WO2008148273A1

WO2008148273A1 - Driving device using permanent magnet

Info

Publication number: WO2008148273A1
Application number: PCT/CN2007/070122
Authority: WO
Inventors: Daming Gong
Original assignee: Daming Gong
Priority date: 2007-06-06
Filing date: 2007-06-15
Publication date: 2008-12-11
Also published as: CN101320935B; CN101320935A

Abstract

A driving device using permanent magnet includes a power take off portion and a driving portion. The power take off portion includes a nonmagnetic main shaft (4) supported by bearings (3). Many attracted pieces (5) are spirally fixed on the surface of the main shaft (4) in axial direction. The driving portion includes a belt (8) and belt carriers (9). Many permanent magnets (10) are fixed on the outer surface of the belt (8). In the working range, the belt (8) and the main shaft (4) are parallel axially. There is a gap between the permanent magnet (10) and the attracted pieces (5). The distance between the adjacent permanent magnets (10) is equal to the spiral pitch of the attracted piece. The driving device transfers linear motion to rotation motion utilizing magnetic force of permanent magnet. There is no direct mechanical friction during transmission and it reduces noise pollution.

Description

Transmission device using permanent magnets

The transmission device using the permanent magnet belongs to the technical field of mechanical transmission, in particular, the magnetic force of the permanent magnet is used to convert the mechanical linear motion into a rotating mechanical device. Background technique

In the prior art, a patent document of 93105855. 4 "a permanent magnetic force rotary motion linear reciprocating motion conversion mechanism" is retrieved, and the technical solution is to use the N and S poles alternately arranged on the disc. The magnetic pole interacts with other discs of the same arrangement, so that one or more discs are rotated, and the disc, which is called a moving disc, is pushed to reciprocate linear motion, thereby realizing the conversion of the motion mode. The CN2526597Y "Magnetic Transmission" patent document was retrieved, and the technical solution is to transmit the mechanical rotation into mechanical rotation, which is substantially equivalent to the magnetic transmission clutch. The Applicant has not found a means of converting mechanical linear motion into continuous mechanical rotation using permanent magnets. Summary of the invention

In order to solve the technical problems existing in the prior art, the object of the invention is to design a magnetic structure of a permanent magnet to have a simple structure, easy manufacture, low cost, no noise, and can effectively prevent mechanical overload when mechanically overloaded. Parts, which can easily convert mechanical linear motion into a continuously rotating transmission.

In order to achieve the above object, the technical solution of the present invention includes a power output portion and a driving portion, wherein the power output portion has a non-magnetic spindle supported on the bearing, and the spindle surface is spirally fixed to the plurality of suction pieces in the axial direction; The utility model has a guide wheel and a transmission belt driven by an external force. The plurality of permanent magnets are fixed on the outer surface of the transmission belt, and the outer surface of the transmission belt in the working area is parallel to the axial direction of the main shaft, and there is a gap between the permanent magnet and the suction piece, adjacent to the permanent The pitch of the magnets is equal to the pitch of the suction helix on the spindle. The suction sheet is a ferromagnetic material that protrudes from the surface of the main shaft and is fixed to the surface of the main shaft along a tangential line. The drive belt surrounds the two guide wheels, and the two guide wheels are fixed to the shaft ends of the two parallel guide wheels. The drive belt is a toothed belt. At least one of the two guide wheels of the driving portion is a driving wheel, and the driving wheel is a toothed wheel that meshes with the toothed belt. The base of the driving portion is provided with a guide rail on the opposite side of the main shaft, and a permanent magnet fixed to the toothed belt is exposed from the middle of the guide rail. Rollers are arranged on both sides of the permanent magnets of the driving part, and the rollers are placed on the permanent magnets through the roller axle pins, and the rollers are in contact with the inner surface of the guide rails. The permanent magnet is fixedly connected to the toothed belt by the permanent magnet seat, and the permanent magnet fixed in the permanent magnet seat is perpendicular to the outer surface of the toothed belt. A slide is provided between the toothed belt and the base. Due to the above technical solution, in use, the driving roller driven by the external force rotates, and the driving belt meshed with the driving wheel is moved between the two guiding wheels, and the permanent magnet fixed on the transmission belt moves linearly, due to the ferromagnetism on the surface of the main shaft. The suction piece of the material is arranged in a spiral shape, the magnetic force of the permanent magnet attracts the suction piece, and the spacing tends to a minimum distance. As the permanent magnet moves forward in the direction parallel to the main axis, the suction piece is spirally arranged on the main shaft. The suctioned piece that has been attracted to the minimum distance is sequentially desorbed, and the front suction piece is sequentially attracted by the magnetic force, and the magnetic force continuously attracts the suction piece that has not reached the minimum distance in front to the minimum distance, and the generated torque is fixedly connected with the suction piece. The spindle produces a rotation. Moreover, since the pitch of the permanent magnets is equal to the pitch of the suction-receiving piece arranged spirally on the main shaft, when the current permanent magnet moves to the working state of the guide wheel, the latter permanent magnet enters the working state, so that the main shaft can be continuously stable. Running. There is a gap between the permanent magnet and the suction piece to avoid direct contact between the two to generate mechanical friction, reduce the resistance, and at the same time effectively prevent the mechanical parts from being damaged when the mechanical overload is broken, thereby invalidating the overall mechanical device, thereby ensuring the overall mechanical The operation of the device is safe; since there is no direct mechanical friction, no mechanical noise pollution occurs. The invention has the advantages of simple structure, easy manufacture and low cost, and can easily and effectively convert the linear motion of the machine into continuous rotation. DRAWINGS

1 is a schematic view showing the overall configuration of a first embodiment of a transmission device using a permanent magnet according to the present invention;

Figure 2 is a cross-sectional view taken along line A - A of Figure 1;

3 is a schematic view showing a connection relationship between a main shaft and a suction piece in the first embodiment of the transmission device using the permanent magnet of the present invention;

4 is a partially enlarged schematic view showing a portion of a permanent magnet, a guide rail and a toothed belt in a first embodiment of a transmission device using a permanent magnet according to the present invention;

Figure 5 is a top plan view of Figure 4;

Figure 6 is a left side view of the B-B section of Figure 4;

7 is a schematic view showing the overall configuration of a second embodiment of a transmission device using a permanent magnet according to the present invention;

Figure 8 is a top plan view of Figure 7;

Figure 9 is a partially enlarged schematic view showing the permanent magnet, the toothed belt and the guide wheel in the C-C section of Figure 8;

10 is an enlarged schematic partial cross-sectional view showing a permanent magnet, a toothed belt, and a slide in a second embodiment of a transmission device using a permanent magnet according to the present invention;

Figure 1 is a top plan view of Figure 10;

Figure 12 is a left side elevational view, taken along the line D-D of Figure 10; detailed description

The technical solutions of the present application are further described below in conjunction with the specific embodiments shown in the drawings. Referring to Fig. 1, a first embodiment of a transmission using a permanent magnet includes a power output portion and a driving portion, wherein the power output portion includes a non-magnetic spindle 4, and both ends thereof pass through a bearing seat 2 equipped with a bearing 3. Mounting and fixing, obviously, the bearing 3 reduces the rotational frictional resistance of the main shaft 4, and the output wheel 1 is fixed at one end of the main shaft 4 as a power output end of the transmission device using the permanent magnet; the surface of the main shaft 4 is spirally fixed in the axial direction Suction sheet 5. The drive portion has a guide pulley 9 and a belt, and the belt can be a flat belt or a toothed belt. In the embodiment, the toothed belt 8 surrounds the two guide wheels 9, and the two guide wheels 9 are fixed to the ends of the two parallel guide shafts 13. The plurality of permanent magnets 10 are directly fixed on the outer surface of the toothed belt 8, and the tooth shape in the working area The belt 8 is axially parallel to the main shaft 4, and has a gap between the permanent magnet 10 and the suction piece 5, and the pitch of the adjacent permanent magnets 10 is equal to the pitch of the spiral of the suction piece 5 on the main shaft 4. At least one of the two guide wheels 9 of the drive portion is a drive wheel, which is a toothed wheel that meshes with the toothed belt 8. When the driving guide 9 driven by the external force rotates, the toothed belt 8 that meshes with the guide pulley 9 is moved between the two guide wheels 9, and the permanent magnet 10 fixed to the toothed belt 8 moves linearly.

Referring to Figures 2 and 3, the driving portion is disposed in the base 7, and the two guide wheels 9 are fixed to the ends of the two parallel guide shafts 13. Fix the guide rail 6 on the base 7. The permanent magnet 10 has a trajectory parallel to the axis of the main shaft 4. The suction sheet 5 is made of a ferromagnetic material so as to be attracted to the permanent magnet 10. It protrudes from the surface of the main shaft 4 and is tangentially fixed to the surface of the main shaft 4, so that the sheet-like receiving sheet 5 is attracted by the permanent magnet 10 with the largest area to obtain the maximum rotational moment, and at the same time, the permanent magnet 10 is separated by the minimum area. attract. The suction piece 5 can also be directly spirally embedded on the surface of the main shaft 4, and does not protrude from the surface of the main shaft 3, and can still generate a rotational moment. The suction piece 5 can also be made of a permanent magnet material, and the spindle 4 is mounted such that its magnetic poles are opposite to the magnetic poles of the opposite permanent magnets 10 to generate a rotational moment.

There is a gap between the permanent magnet 10 and the suction-receiving piece 5, which does not cause mechanical friction, reduces mechanical noise and reduces running resistance, and at the same time, cushioning can be realized here in the event of mechanical overload, thereby ensuring the safety of the overall machine. Of course, the gap should be small to improve the magnetic attraction efficiency of the permanent magnet 10. In order to ensure the gap between the permanent magnet 10 and the receiving sheet 5, the driving portion of the permanent magnet 10 is disposed in the base 7, and the base 7 is fixed to the main shaft 4 in the direction of the main shaft 4, and the guide rail 6 limits the toothed belt 8 to the main shaft. The direction of 4 is close, and the gap between the permanent magnet 10 and the suction piece 5 is ensured.

Referring to Figures 4, 5 and 6, in order to reduce the mechanical friction between the toothed belt 8 and the guide rail 6, the permanent magnet 10 is fixed to the toothed belt 8, and is mounted on both sides of the permanent magnet 10 by the roller axle pin 12, respectively. With the roller 1 1, the roller 1 1 is in contact with the inner surface of the guide rail 6 and rolls along the guide rail 6, so that the permanent magnet 10 can maintain a small gap with the suction piece 5, Further, the mechanical contact friction between the toothed belt 8 and the guide rail 6 is changed to the rolling friction with the roller 11, that is, the frictional resistance is reduced. The fixed connection between the permanent magnet 10 and the toothed belt 8 can be a rivet connection or a bolted connection.

The working principle of the invention: under the driving of the external force, the permanent magnet 10 moves forward in the direction parallel to the main shaft 4, and the suction piece 5 which is spirally arranged on the main shaft 4 has been attracted to the minimum distance and is sequentially separated from the suction, the front The suction-receiving piece 5 is sequentially attracted by the magnetic force, and the magnetic force continuously attracts the suction-receiving piece 5 which has not reached the minimum distance in front to the minimum distance, since the plurality of suction-receiving pieces 5 are spirally fixed to the surface of the main shaft 4 in a continuous manner. Above, the generated torque causes the spindle 4 to rotate. Moreover, since the distance between the permanent magnets 10 is equal to the pitch of the spirally-shaped suction piece 5 on the main shaft 4, when the current permanent magnet 10 moves to the guide wheel 9 to exit the working state, the latter permanent magnet 10 just enters the working state, thereby The main shaft 4 is capable of continuous and stable operation. The input force can be changed and adjusted by changing the magnetic strength of the permanent magnet 10, the size and number of the suction piece 5, and the number of the spirals of the suction piece 5 on the main shaft 4, depending on the requirements for the transmission force in use. Match the output force to meet the usage requirements.

Referring to Figures 7 and 8, this is a second embodiment of the transmission device using the permanent magnet of the present invention, which differs from the first embodiment in that the orientation of the driving portion is changed, i.e., the outer surface of the toothed belt of the transmission It is rotated in a direction perpendicular to the main shaft, and the former is rotated in a direction parallel to the main shaft; the power output portion is not changed. Due to the change in the relative position between the driving portion and the power output portion, the arrangement of the permanent magnet 10 on the toothed belt 8 is correspondingly changed to maintain the correct working state between the permanent magnet 10 and the sucked sheet 5. Since the guide wheel 9, the toothed belt 8, and the permanent magnet 10 are operated in the horizontal direction, in order to enable the permanent magnet 10 to correctly enter the working area and push out the working area, a permanent between the permanent magnet 10 and the toothed belt 8 is added. Magnet holder 15.

Referring to Figures 9, 10, 11, and 12, the changes of the second embodiment will be described in detail. The permanent magnet 10 is disposed on the top surface of the permanent magnet seat 15, and the permanent magnet seat 15 is provided with a mounting surface at an angle of 90 degrees to the top surface thereof, and the mounting surface is fixedly connected with the outer surface of the toothed belt 8, so that the mounting is performed. The permanent magnet 10 on the outer surface of the toothed belt 8 is still able to maintain the correct working state with the main shaft 4 of the power output portion. At this time, since the toothed belt 8 is in the vertical direction in the working state, the toothed belt 8 will sag in the working area, so that the distance between the permanent magnet 10 and the main shaft 4 is increased, and the permanent magnet 10 is subjected to the vertical The attraction between the suction pieces 5 is reduced, resulting in deterioration of the working state. In order to solve the problem of the spacing between the two, a slide 14 is added below the toothed belt 8 on the base 7, so that the toothed belt 8 is supported by the slide rail 14, and the roller 1 1 and the guide rail 6 above the permanent magnet seat 15 The joint is clamped from the upper and lower directions to maintain the correct working state of the toothed belt 8 and the permanent magnet 10. The operation of the toothed belt 8 in the slide 14 produces frictional resistance, so that the slide 14 can be set as a ball slide or a roller slide to make the operation smoother. Industrial applicability

The invention utilizes a transmission device of a permanent magnet for changing the state of mechanical motion in the field of mechanical technology. That is, in use, the linear motion of the permanent magnet can be converted into the rotation of the main shaft. The permanent magnet and the suction piece maintain a small gap to avoid contact friction, that is to say, there is no direct mechanical friction between them, and no mechanical noise pollution occurs. At the same time, the frictional resistance between the belt and the guide rail is also small. The transmission device has the advantages of simple structure, easy manufacture and low cost, and can easily and effectively convert the linear motion of the machine into continuous rotation.

Claims

Rights request

A transmission device using a permanent magnet, comprising: a power output portion and a driving portion, wherein a power output portion has a non-magnetic spindle supported on the bearing, and the spindle surface is spirally fixed to the plurality of suction blades in the axial direction ;

A driving portion has a guide wheel and a transmission belt driven by an external force, and a plurality of permanent magnets are fixed on an outer surface of the transmission belt, and an outer surface of the transmission belt in the working area is parallel to the axial direction of the main shaft, and a gap is formed between the permanent magnet and the suction receiving piece. The spacing of adjacent permanent magnets is equal to the pitch of the suction helix on the spindle.

The transmission device using a permanent magnet according to claim 1, wherein the suction piece is a ferromagnetic material which protrudes from the surface of the main shaft and is fixed to the surface of the main shaft along a tangential line.

3. The transmission device using permanent magnets according to claim 2, wherein the transmission belt surrounds the two guide wheels, and the two guide wheels are fixed to the shaft ends of the two parallel guide wheels.

4. The transmission device using permanent magnets according to claim 3, wherein the transmission belt is a toothed belt.

The transmission device using permanent magnets according to claim 4, wherein at least one of the two guide wheels of the driving portion is a driving wheel, and the driving wheel is a toothed wheel that meshes with the toothed belt.

A transmission device using a permanent magnet according to claim 5, wherein the base of the driving portion is provided with a guide rail on the opposite side of the main shaft, and the permanent magnet fixed to the toothed belt is exposed from the middle of the guide rail.

The transmission device using a permanent magnet according to claim 6, wherein a roller is disposed on both sides of the permanent magnet of the driving portion, and the roller is placed on the permanent magnet through the roller pin, and the roller is in contact with the inner surface of the rail.

8. The transmission device according to claim 7, wherein the permanent magnet is fixedly connected to the toothed belt by the permanent magnet seat, and the outer surface of the permanent magnet and the outer surface of the toothed belt fixed in the permanent magnet seat The face is vertical.

The transmission device using a permanent magnet according to claim 8, wherein a chute is provided between the toothed belt and the base.