WO2011093807A1 - Bottom plate with bumper, made of thermoplastic material, used at air suspension systems - Google Patents
Bottom plate with bumper, made of thermoplastic material, used at air suspension systems Download PDFInfo
- Publication number
- WO2011093807A1 WO2011093807A1 PCT/TR2010/000264 TR2010000264W WO2011093807A1 WO 2011093807 A1 WO2011093807 A1 WO 2011093807A1 TR 2010000264 W TR2010000264 W TR 2010000264W WO 2011093807 A1 WO2011093807 A1 WO 2011093807A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bottom plate
- bumper
- air
- open end
- piston
- Prior art date
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 20
- 239000012815 thermoplastic material Substances 0.000 title description 9
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000004033 plastic Substances 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 210000000078 claw Anatomy 0.000 claims description 13
- 239000005060 rubber Substances 0.000 claims description 12
- 229920001169 thermoplastic Polymers 0.000 claims description 11
- 239000004416 thermosoftening plastic Substances 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000004952 Polyamide Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 229920002647 polyamide Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 6
- 239000011152 fibreglass Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/04—Buffer means for limiting movement of arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
- F16F9/052—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type characterised by the bumper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs
Definitions
- Present invention relates to air suspension systems which are used in transport vehicles such as articulated lorry, autobus, tractor, semi-trailer to provide constant vehicle height under all loading conditions, higher spring capability, ride comfort and vehicle level parallel to the road even though unbalanced loadings.
- Present invention especially relates to a bottom plate with bumper, consisting of two different parts made of thermoplastic material, used at air suspension systems.
- Air suspension systems generally comprise a plastic or metal piston fixed to the vehicle axle by means of a connection flange, an elastomeric air spring part vulcanized air tight manner from its lower open end to the upper part of the piston and from its upper open end to the metal plate which is fixed to the vehicle chassis.
- the inner volume of the elastomeric air spring part which is fixed air tightly to the piston and the plate, is filled with air provided by a compressor and passing through a hole on the plate and in conclusion the suspension system can absorb the vibrations.
- bottom plates which are mounted on the upper side of the piston after that the bottom plate is vulcanized to the lower open end of the elastomeric air spring, are used.
- This bottom plate is made of metal material and has a form of plate having high resistance.
- a bumper made of rubber material is generally mounted onto the bottom plate. Bumpers made of rubber, function as a security element and absorb the force which is occurred as a conclusion that the vehicle chassis suddenly falls down because of the air spring burst or the overloaded vehicle. If the bumper is not used, the whole weight of the vehicle chassis will be loaded onto the piston or bottom plate without absorbing, and in this case the breaking risk of these parts will be increased. So that the security problems will be occurred. Plastic material can also be used as bumper material. EP 0943836 and EP 0501043 numbered European Patent Applications relate to plastic bumper structures.
- Metal based bumper pin is used to mount the bumper onto the bottom plate.
- Rubber or plastic based bumper provides the montage of the bumper onto the bottom plate which undergoes onto the bumper pin fixed by a bolt onto the upper surface of the bottom plate. Bolt threads undergo suitable pitches inside the pin. Thus, bumper pin is fixed on the bottom plate.
- bottom plate and bumper are stand alone each other and then bumper pin, welding etc. are used for assembling the bottom plate and bumper which are independent from each other. Also it increases the production cost with a considerable amount.
- metallic based materials which have a high strength are used to produce the bottom plates.
- bumper is made of rubber, plastic materials or combination of these two materials.
- connection methods like bumper pin, welding etc. have to be used to connect these parts. Thus the labor costs and production costs increase and production speed decreases.
- EP 0969223 numbered European Patent Application relates to an elastomeric shock-absorber mounted over the bumper pin. Elastomeric shock-absorber is supported from its sideways with a solid support placed in a metal or plastic solid support. And thus it is prevented that the flinging of the bumper from the bumper pin.
- EP 0969224 numbered European Patent Application relates to a single-piece support member made of solid hard metal, on which an elastomeric member (shock-absorber) is mounted and which is welded on the bottom plate.
- the purpose of the present invention is to design a bottom plate with bumper, used at air suspension systems, which is obtained by the connection of the two thermoplastic parts passing into each other without using any connection element (bumper pin etc.) or welding method. Since an additional connection apparatus or a connection method is not used, cost losses and labor are minimized.
- the other purpose of the invention is, designed thermoplastic bottom plate with bumper, realizes the function of the bumper absorbing the loads and the bottom plate vulcanized on the lower end of the elastomeric bellows in prior art, which are independent from each other.
- the bumper and bottom plate production will be completely made from the thermoplastic material (polyamide and polypropylene) with a new production method (plastic injection) and these two parts will be connected to each other without using any welding, connection part etc.
- the bottom plate and the bumper will be joined by engaging to each other and this joining process will be realized by using the contraction feature of the thermoplastic material and any weld, additional connection part etc. will not be used to join these two parts.
- the production costs will be significantly decreased by the new designed thermoplastic bottom plate with bumper.
- Each part composing the bottom plate with bumper will be serially produced in a plastic injection machine with one process and these parts will be joined to each other by only using the contraction feature of the thermoplastic material without any additional connection part or method. Thanks to this, production and labor costs will be decreased 50 percent in comparison with present bottom plate and bumper.
- the production speed also will be increased.
- the another advantage of the invention since the bottom plate and the bumper are produced from the plastic based material, the applications such as bumper pin, weld etc. used to join the bottom plate and the bumper to each other, will be eliminated. Thanks to this, cost and labor losses will be eliminated caused by additional connection parts or connection methods and no need the qualified personal.
- an air suspension system which comprises a plastic or metal piston fixed to the vehicle axle and an elastomeric bellows which is air tightly fixed from its lower open end to the upper part of the piston and from its upper open end to the metal plate connected with the vehicle chassis to form a pressured air chamber, characterized in that; it comprises
- a bottom plate made of thermoplastic based material completely, consisting of a body and a compression part as integral and said bottom plate is mounted to the upper side of the piston after that it is vulcanized to the lower open end of the elastomeric bellows or after that it is fixed to the lower open end of the elastomeric bellows in an air tight manner
- a bumper which is completely made of thermoplastic or rubber based material, mounted to the upper part of the body of the said bottom plate.
- Figure 1 the side cross-sectional view of the air suspension system.
- Figure 2 the perspective view of the bottom plate with bumper.
- FIG. 3 the upper view of the bottom plate with bumper.
- Figure 4 the A-A cross-sectional view in figure 3.
- Air suspension systems (1) generally comprise a plastic or metal piston (4) fixed to the vehicle axle and an elastomeric bellows (2) which is air tightly vulcanized from its lower open end to the upper part of the piston (4) and from its upper open end to the metal plate (3) fixed to the vehicle chassis.
- the lower and upper open ends of the elastomeric bellows (2) are fixed onto the piston (4) and plate
- connection element (8) provides the fixation of the bottom plate (5) to the piston (4) by engaging into the metal based connection apparatus (7) which is formed in inner part of the bottom plate (5) and which has gains in its inner side.
- a bolt is used as the connection element (8).
- Bottom plate (5) provides the absorption of the loads and further that provides the fixation of the elastomeric bellows (2) onto the piston (4) air tightly in a manner thanks to the bottom plate (5) is vulcanized to the lower end of the elastomeric bellows (2) and after that it is mounted onto the piston (4).
- bottom plate (5) is completely made of reinforced thermoplastic material.
- Polyamide (PA) reinforced with fiberglass is preferably used as bottom plate (5) material.
- bottom plate (5) can be produced from rubber based material.
- Bottom plate (5) consists of, a body (5.1) and a compression part (5.2), which are formed as a single-piece. Compression part (5.2) is vulcanized to the lower open end of the elastomeric bellows (2) in air-tightly manner or it is fixed to the lower open end of the elastomeric bellows (2) in air-tightly manner without vulcanization.
- a vulcanization region (5.3) is formed between the elastomeric bellows (2) and compression part (5.2) after the vulcanization process (See Fig 1).
- Ribs (5.4) providing the resistance increase, are formed between the body (5.1) of the bottom plate (5) and compression part (5.2). These ribs (5.4) minimize the breaking risk of the bottom plate (5) because of the first load coming onto the bottom plate (5) and increase the resistance, if the air inside the air spring is discharged or the vehicle is over-loaded.
- Slots (5.1.1) are formed on the upper part of the body (5.1) of the bottom plate (5) as it seen in Figure 4.
- Bottom plate (5) is produced in a plastic injection machine. Core gaps (5.5) are formed on the bottom plate (5) to realize this injection process.
- a thermoplastic or rubber based bumper (6) is mounted onto the bottom plate (5) made of reinforced thermoplastic material.
- a connection means or method is not used for this montage process.
- Two parts are mounted by engaging to each other. As it seen in Figure 4, the claws (6.1) formed on the bumper (6) get into the slots (5.1.1) formed on the body (5.1) of the bottom plate (5).
- Bumper (6) is completely made of polypropylene (PP) material.
- Bumper (6) is produced with one process in a plastic injection machine such as bottom plate (5).
- Bumper (6) can be alternatively produced from rubber based material.
- the montage process of the bottom plate (5) and the bumper (6) is realized as following. Firstly, the production of the bumpers (6) made of polypropylene (PP) material, is realized in a plastic injection machine. Claws (6.1) are formed on the bumpers (6) during the injection process by means of the special injection molds. The obtained bumper (6) with claws (6.1) after the injection process, is cooled.
- PP polypropylene
- the bottom plates (5) made of polyamide (PA) reinforced with fiberglass, are produced.
- slots (5.1.1) which are consistent with the claws (6.1) on the bumper (6), are formed on the body (5.1) of the bottom plates (5) by the special injection molds.
- the bumper (6) is placed into the gap on the body (5.1).
- the claws (6.1) on the bumper (6) are engaged into the slots (5.1.1) inside the bottom plate (5).
- the bottom plate (5) makes a contraction in a certain rate and diameter contraction is occurred.
- the slots (5.1.1) around the circular surface inside the bottom plate (5) grips the claws (6.1) on the bumper (6) completely and so that the montage of the bumper (6) onto the bottom plate (5) in an undetachable manner, is provided.
- the bumper (6) can not be detached, even though it is pulled out by a major force applied from the outer side.
- the metal based connection apparatus (7) is formed integral with said bottom plate (5) during the plastic injection process. After the connection apparatus (7) is placed into the mold of the plastic injection machine, plastic injection process is made. After the plastic injection process, the surround of the connection apparatus (7) is completely covered with reinforced thermoplastic and the bottom plate (5) is obtained.
- the thermoplastic material used to produce the bottom plate (5) and the bumper (6), is preferably reinforced with fiberglass etc. and the endurance of the bottom plate with bumper is increased.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Present invention relates to a production and assembly method of a bottom plate (5) and a bumper (6) of an air suspension system (1) comprising a plastic or metal piston (4) fixed to the vehicle axle and an elastomeric bellows (2) which is air tightly fixed from its lower open end to the upper part of the piston (4) and from its upper open end to the metal plate (3) connected with the vehicle chassis to form a pressured air chamber.
Description
DESCRIPTION
BOTTOM PLATE WITH BUMPER, MADE OF THERMOPLASTIC MATERIAL, USED AT AIR
SUSPENSION SYSTEMS
Technical Field
Present invention relates to air suspension systems which are used in transport vehicles such as articulated lorry, autobus, tractor, semi-trailer to provide constant vehicle height under all loading conditions, higher spring capability, ride comfort and vehicle level parallel to the road even though unbalanced loadings.
Present invention especially relates to a bottom plate with bumper, consisting of two different parts made of thermoplastic material, used at air suspension systems.
Prior Art
Currently air springs are used in transport vehicles such as articulated lorry, autobus, tractor, semi-trailer to provide constant vehicle height under all loading conditions, higher spring capability, ride comfort and vehicle level parallel to the road even though unbalanced loadings. Air suspension systems generally comprise a plastic or metal piston fixed to the vehicle axle by means of a connection flange, an elastomeric air spring part vulcanized air tight manner from its lower open end to the upper part of the piston and from its upper open end to the metal plate which is fixed to the vehicle chassis. The inner volume of the elastomeric air spring part which is fixed air tightly to the piston and the plate, is filled with air provided by a compressor and passing through a hole on the plate and in conclusion the suspension system can absorb the vibrations.
At some types of the air springs, bottom plates, which are mounted on the upper side of the piston after that the bottom plate is vulcanized to the lower open end of the elastomeric air spring, are used. This bottom plate is made of metal material and has a form of plate having high resistance.
A bumper made of rubber material, is generally mounted onto the bottom plate. Bumpers made of rubber, function as a security element and absorb the force which is occurred as a conclusion
that the vehicle chassis suddenly falls down because of the air spring burst or the overloaded vehicle. If the bumper is not used, the whole weight of the vehicle chassis will be loaded onto the piston or bottom plate without absorbing, and in this case the breaking risk of these parts will be increased. So that the security problems will be occurred. Plastic material can also be used as bumper material. EP 0943836 and EP 0501043 numbered European Patent Applications relate to plastic bumper structures.
Metal based bumper pin is used to mount the bumper onto the bottom plate. Rubber or plastic based bumper provides the montage of the bumper onto the bottom plate which undergoes onto the bumper pin fixed by a bolt onto the upper surface of the bottom plate. Bolt threads undergo suitable pitches inside the pin. Thus, bumper pin is fixed on the bottom plate.
At the present technique, bottom plate and bumper are stand alone each other and then bumper pin, welding etc. are used for assembling the bottom plate and bumper which are independent from each other. Also it increases the production cost with a considerable amount. Currently, metallic based materials which have a high strength are used to produce the bottom plates. On the other hand bumper is made of rubber, plastic materials or combination of these two materials. To fix these two different parts, connection methods like bumper pin, welding etc. have to be used to connect these parts. Thus the labor costs and production costs increase and production speed decreases.
EP 0969223 numbered European Patent Application relates to an elastomeric shock-absorber mounted over the bumper pin. Elastomeric shock-absorber is supported from its sideways with a solid support placed in a metal or plastic solid support. And thus it is prevented that the flinging of the bumper from the bumper pin.
EP 0969224 numbered European Patent Application relates to a single-piece support member made of solid hard metal, on which an elastomeric member (shock-absorber) is mounted and which is welded on the bottom plate.
In EP 0501043 numbered European Patent Application, single-piece bumper is made of solid plastic material and the inward and upward slopped claws comes into the slots on the bumper pin, thus flinging of the bumper over the bumper pin is prevented.
If the present patent applications are examined, it is seen that the bottom plate and bumper are independent from each other and different connection parts and methods are used to connect these two parts. Further that it is seen in all patent applications that the bottom plate is made of metal material. On the other hand, bumper is made of rubber, plastic material or combination of these two materials (plastic+rubber) and is subsequently mounted onto the bottom plate. Because of this operation montage time and labor costs will be increased.
Brief Description of the Invention The purpose of the present invention is to design a bottom plate with bumper, used at air suspension systems, which is obtained by the connection of the two thermoplastic parts passing into each other without using any connection element (bumper pin etc.) or welding method. Since an additional connection apparatus or a connection method is not used, cost losses and labor are minimized.
The other purpose of the invention is, designed thermoplastic bottom plate with bumper, realizes the function of the bumper absorbing the loads and the bottom plate vulcanized on the lower end of the elastomeric bellows in prior art, which are independent from each other. Thanks to the invention, the bumper and bottom plate production will be completely made from the thermoplastic material (polyamide and polypropylene) with a new production method (plastic injection) and these two parts will be connected to each other without using any welding, connection part etc. It will be provided that the bottom plate and the bumper will be joined by engaging to each other and this joining process will be realized by using the contraction feature of the thermoplastic material and any weld, additional connection part etc. will not be used to join these two parts. The production costs will be significantly decreased by the new designed thermoplastic bottom plate with bumper. Each part composing the bottom plate with bumper will be serially produced in a plastic injection machine with one process and these parts will be joined to each other by only using the contraction feature of the thermoplastic material without any additional connection part or method. Thanks to this, production and labor costs will be decreased 50 percent in comparison with present bottom plate and bumper. The production speed also will be increased.
The another advantage of the invention, since the bottom plate and the bumper are produced from the plastic based material, the applications such as bumper pin, weld etc. used to join the bottom plate and the bumper to each other, will be eliminated. Thanks to this, cost and labor losses will be eliminated caused by additional connection parts or connection methods and no need the qualified personal.
In order to attain the aforesaid objectives, an air suspension system is designed which comprises a plastic or metal piston fixed to the vehicle axle and an elastomeric bellows which is air tightly fixed from its lower open end to the upper part of the piston and from its upper open end to the metal plate connected with the vehicle chassis to form a pressured air chamber, characterized in that; it comprises
- a bottom plate, made of thermoplastic based material completely, consisting of a body and a compression part as integral and said bottom plate is mounted to the upper side of the piston after that it is vulcanized to the lower open end of the elastomeric bellows or after that it is fixed to the lower open end of the elastomeric bellows in an air tight manner,
- a bumper, which is completely made of thermoplastic or rubber based material, mounted to the upper part of the body of the said bottom plate.
Explanation of the Figures
Figure 1 , the side cross-sectional view of the air suspension system.
Figure 2, the perspective view of the bottom plate with bumper.
Figure 3, the upper view of the bottom plate with bumper.
Figure 4, the A-A cross-sectional view in figure 3.
Reference Numbers
1. Air suspension system
2. Elastomeric bellows
3. Plate
3.1 Air inlet/outlet hole
3.2 Connection bolt
4. Piston
5. Bottom plate
5.1 Body
5.1.1 Slot
5.2 Compression part
5.3 Vulcanization region
5.4 Rib
5.5 Core gap
6. Bumper
6.1 Claw
7. Connection apparatus
8. Connection element
Detailed Description of the Invention
In Figure 1 , the perspective view of the air suspension system (1) is given. Air suspension systems (1) generally comprise a plastic or metal piston (4) fixed to the vehicle axle and an elastomeric bellows (2) which is air tightly vulcanized from its lower open end to the upper part of the piston (4) and from its upper open end to the metal plate (3) fixed to the vehicle chassis. The lower and upper open ends of the elastomeric bellows (2) are fixed onto the piston (4) and plate
(3) in air-tightly manner. Thanks to this, a pressured air chamber is formed inside the elastomeric bellows (2), which absorbs the loads and the vibrations occurred during the vehicle motion.
There is an air inlet/outlet hole (3.1) on the plate (3) to fill the pressured air into the elastomeric bellows (2) or to discharge the pressured air inside the bellows (2) to the outside. Further that, there is at least one connection bolt (3.2) on the plate (3) to provide the connection between the plate (3) and the vehicle chassis.
As it seen in Figure 1 , a bottom plate (5), which is mounted onto the upper surface of the piston
(4) after it is vulcanized or fixed to the lower open end of the elastomeric bellows (2), is used at air suspension system (1). Bottom plate (5) is fixed piston (4) upper surface by a connection element (8). Connection element (8) provides the fixation of the bottom plate (5) to the piston (4) by engaging into the metal based connection apparatus (7) which is formed in inner part of the bottom plate (5) and which has gains in its inner side. Preferably a bolt is used as the connection element (8). Bottom plate (5) provides the absorption of the loads and further that provides the fixation of the elastomeric bellows (2) onto the piston (4) air tightly in a manner thanks to the bottom plate (5) is vulcanized to the lower end of the elastomeric bellows (2) and after that it is mounted onto the piston (4).
The perspective view of the bottom plate with bumper, is given in Figure 2. Preferably bottom plate (5) is completely made of reinforced thermoplastic material. Polyamide (PA) reinforced with fiberglass is preferably used as bottom plate (5) material. Alternatively bottom plate (5) can be produced from rubber based material. Bottom plate (5) consists of, a body (5.1) and a compression part (5.2), which are formed as a single-piece. Compression part (5.2) is vulcanized to the lower open end of the elastomeric bellows (2) in air-tightly manner or it is fixed to the lower open end of the elastomeric bellows (2) in air-tightly manner without vulcanization. A
vulcanization region (5.3) is formed between the elastomeric bellows (2) and compression part (5.2) after the vulcanization process (See Fig 1). Ribs (5.4), providing the resistance increase, are formed between the body (5.1) of the bottom plate (5) and compression part (5.2). These ribs (5.4) minimize the breaking risk of the bottom plate (5) because of the first load coming onto the bottom plate (5) and increase the resistance, if the air inside the air spring is discharged or the vehicle is over-loaded. Slots (5.1.1) are formed on the upper part of the body (5.1) of the bottom plate (5) as it seen in Figure 4. Bottom plate (5) is produced in a plastic injection machine. Core gaps (5.5) are formed on the bottom plate (5) to realize this injection process. A thermoplastic or rubber based bumper (6) is mounted onto the bottom plate (5) made of reinforced thermoplastic material. However, a connection means or method is not used for this montage process. Two parts are mounted by engaging to each other. As it seen in Figure 4, the claws (6.1) formed on the bumper (6) get into the slots (5.1.1) formed on the body (5.1) of the bottom plate (5). Bumper (6) is completely made of polypropylene (PP) material. Bumper (6) is produced with one process in a plastic injection machine such as bottom plate (5). Bumper (6) can be alternatively produced from rubber based material.
The montage process of the bottom plate (5) and the bumper (6) is realized as following. Firstly, the production of the bumpers (6) made of polypropylene (PP) material, is realized in a plastic injection machine. Claws (6.1) are formed on the bumpers (6) during the injection process by means of the special injection molds. The obtained bumper (6) with claws (6.1) after the injection process, is cooled.
After that, the bottom plates (5) made of polyamide (PA) reinforced with fiberglass, are produced. After this process, slots (5.1.1), which are consistent with the claws (6.1) on the bumper (6), are formed on the body (5.1) of the bottom plates (5) by the special injection molds. After the hot bottom plate (5) is put out from the plastic injection machine, the bumper (6) is placed into the gap on the body (5.1). After this process, the claws (6.1) on the bumper (6), are engaged into the slots (5.1.1) inside the bottom plate (5). After that, as a conclusion of the cooling of the hot bottom plate (5), the bottom plate (5) makes a contraction in a certain rate and diameter contraction is occurred. As a result of the contraction and diameter shrinkage, the slots (5.1.1) around the circular surface inside the bottom plate (5), grips the claws (6.1) on the bumper (6) completely and so that the montage of the bumper (6) onto the bottom plate (5) in an
undetachable manner, is provided. The bumper (6) can not be detached, even though it is pulled out by a major force applied from the outer side.
The metal based connection apparatus (7) is formed integral with said bottom plate (5) during the plastic injection process. After the connection apparatus (7) is placed into the mold of the plastic injection machine, plastic injection process is made. After the plastic injection process, the surround of the connection apparatus (7) is completely covered with reinforced thermoplastic and the bottom plate (5) is obtained. The thermoplastic material used to produce the bottom plate (5) and the bumper (6), is preferably reinforced with fiberglass etc. and the endurance of the bottom plate with bumper is increased.
Claims
1. An air suspension system (1) comprising a plastic or metal piston (4) fixed to the vehicle axle and an elastomeric bellows (2) which is air tightly fixed from its lower open end to the upper part of the piston (4) and from its upper open end to the metal plate (3) connected with the vehicle chassis to form a pressured air chamber, characterized in that; it comprises a bottom plate (5), made of thermoplastic based material completely, consisting of a body (5.1) and a compression part (5.2) as integral and said bottom plate (5) is mounted to the upper side of the piston (4) after that it is vulcanized to the lower open end of the elastomeric bellows (2) or after that it is fixed to the lower open end of the elastomeric bellows in an air tight manner,
and, a bumper (6), which is completely made of thermoplastic or rubber based material, mounted to the upper part of the body (5.1 ) of the said bottom plate (5).
2. Air suspension system (1) according to Claim 1 , characterized in that; ribs (5.4) are formed between the body (5.1) of the bottom plate (5) and the compression part (5.2) to provide the resistance increase.
3. Air suspension system (1) according to Claim 1 , characterized in that; slots (5.1.1) are formed on the upper part of the body (5.1 ) of the bottom plate (5).
4. Air suspension system (1) according to Claim 1 , characterized in that; claws (6.1 ), which are consistent with the slots (5.1.1) of the bottom plate (5), are formed on the bumper (6).
5. Air suspension system (1) according to Claim 1 , characterized in that; the bottom plate (5) is made of polyamide (PA) material reinforced with fiberglass, the bumper (6) is completely made of polypropylene (PP) material or alternatively rubber based material.
6. A production and assembly method of a bottom plate (5) and a bumper (6) of an air suspension system (1) comprising a plastic or metal piston (4) fixed to the vehicle axle and an elastomeric bellows (2) which is air tightly fixed from its lower open end to the upper part of the piston (4) and from its upper open end to the metal plate (3) connected with the vehicle chassis to form a pressured air chamber, characterized in that; it comprises the following process steps, firstly, the thermoplastic based bumpers (6) are produced in a plastic injection machine, as a result of this process claws (6.1) are formed on the bumpers (6) by the special injection molds,
the bumpers (6) are cooled after the injection process,
after that, thermoplastic based bottom plates (5) are produced in a plastic injection machine, as a result of this process, slots (5.1.1), which are consistent with the claws (6.1) on the bumper (6), are formed on the upper part of the body (5.1) of the bottom plate (5) by means of the special injection molds,
the cooled bumper (6) is placed into a gap on the upper part of the body (5.1) after the hot bottom plate (5) is taken out from the plastic injection machine, as a result of this placement process, the claws (6.1) on the bumper (6) engage into the slots (5.1.1) inside the bottom plate (5),
after that, thanks to the cooling of the hot bottom plate (5), a contraction and a diameter shrinkage occurs on the bottom plate (5), the slots (5.1.1) around the circular surface of the body (5.1) of the bottom plate (5), grips the claws (6.1) on the bumper (6) completely and so that the montage of the bumper (6) onto the bottom plate (5) in an undetachable manner, is provided.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2010/00543 | 2010-01-26 | ||
| TR2010/00543A TR201000543A2 (en) | 2010-01-26 | 2010-01-26 | Thermoplastic material based wedge bottom bowl for air suspension systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011093807A1 true WO2011093807A1 (en) | 2011-08-04 |
Family
ID=43780963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2010/000264 WO2011093807A1 (en) | 2010-01-26 | 2010-12-28 | Bottom plate with bumper, made of thermoplastic material, used at air suspension systems |
Country Status (2)
| Country | Link |
|---|---|
| TR (1) | TR201000543A2 (en) |
| WO (1) | WO2011093807A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014036316A1 (en) * | 2012-08-29 | 2014-03-06 | Firestone Industrial Products Company, Llc | End members and gas spring assemblies including same |
| CN105730175A (en) * | 2016-03-31 | 2016-07-06 | 山东正凯机械科技有限公司 | Guiding stabilizer for air suspension |
| TWI548822B (en) * | 2012-01-09 | 2016-09-11 | Sumitomo Electric Industries | An air spring for a vehicle and a trolley using the air spring |
| CN107882909A (en) * | 2017-12-11 | 2018-04-06 | 广东溢康通空气弹簧有限公司 | A kind of air spring constructions with auxiliary chamber |
| WO2022169430A1 (en) * | 2021-02-05 | 2022-08-11 | Vi̇bracousti̇c Cv Ai̇r Spri̇ng Otomoti̇v Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Structure preventing piston deformation in commercial vehicle suspension systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0501043A1 (en) | 1991-02-26 | 1992-09-02 | Bridgestone/Firestone, Inc. | Snap-on bumper for air spring |
| EP0864453A1 (en) * | 1997-03-15 | 1998-09-16 | BPW Bergische Achsen Kommanditgesellschaft | Air spring for axles with pneumtic springs |
| EP0943836A2 (en) | 1998-03-12 | 1999-09-22 | BRIDGESTONE/FIRESTONE, Inc. | Bumper extension for use with a bumper on an air spring |
| EP0969224A1 (en) | 1998-06-30 | 2000-01-05 | BRIDGESTONE/FIRESTONE, Inc. | A metal/elastomeric bumper for air springs |
| EP0969223A1 (en) | 1998-06-30 | 2000-01-05 | BRIDGESTONE/FIRESTONE, Inc. | Snap-on bumper for air spring |
| US6460836B1 (en) * | 1997-03-13 | 2002-10-08 | The Goodyear Tire & Rubber Company | Press together air spring |
| EP1300264A2 (en) * | 2001-10-05 | 2003-04-09 | BPW Bergische Achsen Kommanditgesellschaft | Airspring for a vehicle axle suspension |
-
2010
- 2010-01-26 TR TR2010/00543A patent/TR201000543A2/en unknown
- 2010-12-28 WO PCT/TR2010/000264 patent/WO2011093807A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0501043A1 (en) | 1991-02-26 | 1992-09-02 | Bridgestone/Firestone, Inc. | Snap-on bumper for air spring |
| US6460836B1 (en) * | 1997-03-13 | 2002-10-08 | The Goodyear Tire & Rubber Company | Press together air spring |
| EP0864453A1 (en) * | 1997-03-15 | 1998-09-16 | BPW Bergische Achsen Kommanditgesellschaft | Air spring for axles with pneumtic springs |
| EP0943836A2 (en) | 1998-03-12 | 1999-09-22 | BRIDGESTONE/FIRESTONE, Inc. | Bumper extension for use with a bumper on an air spring |
| EP0969224A1 (en) | 1998-06-30 | 2000-01-05 | BRIDGESTONE/FIRESTONE, Inc. | A metal/elastomeric bumper for air springs |
| EP0969223A1 (en) | 1998-06-30 | 2000-01-05 | BRIDGESTONE/FIRESTONE, Inc. | Snap-on bumper for air spring |
| EP1300264A2 (en) * | 2001-10-05 | 2003-04-09 | BPW Bergische Achsen Kommanditgesellschaft | Airspring for a vehicle axle suspension |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI548822B (en) * | 2012-01-09 | 2016-09-11 | Sumitomo Electric Industries | An air spring for a vehicle and a trolley using the air spring |
| WO2014036316A1 (en) * | 2012-08-29 | 2014-03-06 | Firestone Industrial Products Company, Llc | End members and gas spring assemblies including same |
| US9556922B2 (en) | 2012-08-29 | 2017-01-31 | Firestone Industrial Products Company, Llc | End members and gas spring assemblies including same |
| CN105730175A (en) * | 2016-03-31 | 2016-07-06 | 山东正凯机械科技有限公司 | Guiding stabilizer for air suspension |
| CN107882909A (en) * | 2017-12-11 | 2018-04-06 | 广东溢康通空气弹簧有限公司 | A kind of air spring constructions with auxiliary chamber |
| WO2022169430A1 (en) * | 2021-02-05 | 2022-08-11 | Vi̇bracousti̇c Cv Ai̇r Spri̇ng Otomoti̇v Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Structure preventing piston deformation in commercial vehicle suspension systems |
Also Published As
| Publication number | Publication date |
|---|---|
| TR201000543A2 (en) | 2011-01-21 |
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