RU2613655C1 - Motor-car trailer support framework - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention refers to transport machine building The motor-car trailer support framework comprises supporting frame rectangular in shape and loading frame rectangular in shape. The supporting frame is made of metal and is connected to the trailer wheel assembly. The support frame comprises side members and cross members attached to these side members by means of permanent connection. Loading frame is made of metal and the trailer body is being installed on it. Loading frame comprises side members and front, middle and rear cross members attached to the loading frame side members by a fixed releasable connection. The supporting frame side members are arranged under the loading frame side members, in parallel with loading frame side members and fixed to the loading frame side members by a fixed releasable connection. The length of the support frame side members is less than the length of the loading frame side members.

EFFECT: motor-car trailer support framework, which reduces assembly time of the trailer frame construction.

9 cl, 9 dwg

Description

Technical field

The invention relates to structural elements and devices of trailers of passenger cars, namely to chassis frames, consisting of longitudinal and transverse elements.

State of the art

A frame bearing structure of a car trailer is known, which is a rectangular frame for attaching a wheel assembly and a trailer body to it and consisting of two spars and several crossbars (at least two - front and rear); while the cross members are attached to the side members by welding (see, for example, author's certificate. USSR No. 1416362 A1 “Vehicle frame”, IPC: B62D 21/02, published 08.15.1988; patent RU No. 2032574 C1 “Frame of the trailer swivel truck” , IPC: B62D 21/02, B62D 63/08, published on 04/10/19955; Patent RU No. 2032573 C1, “The frame of a trailer trolley, IPC: B62D 21/02, B62D 63/08, published on 04/10/19955).

Signs of the well-known frame, coinciding with the features of the claimed invention, are the presence of spars and connected cross-beams.

The reason that prevents obtaining a technical result in a known frame, which is ensured by the claimed invention, is because the cross members are attached to the side members by welding, which complicates the transport and logistics operations associated with the promotion of trailers on the market.

The closest analogue (prototype) is the frame of the vehicle, made of a rectangular shape and containing the side members and cross members attached to the side members using a rivet connection. At the same time, flanges with reinforcing brackets are fixed at the ends of the cross members by welding, containing holes for rivets fastening the cross members to the side members (see utility model description to patent RU No. 142042 U1 “Vehicle frame”, IPC: B62D 21/02, published 20.06 .2014).

Signs of the known frame, matching with the features of the claimed invention, are the presence of spars and cross members connected to the spars without welding.

The reason that prevents the technical result obtained in the known frame, which is provided by the claimed invention, is because the cross members are attached to the side members by means of a rivet connection, which complicates the transport and logistics operations associated with the promotion of trailers on the market.

Disclosure of invention

The problem to which the claimed invention is directed, is to simplify transport and logistics operations related to the promotion of trailers on the market by providing the possibility of transporting the frame supporting structure of the trailer in an unassembled form (i.e. as a compact constructor), to simplify assembly operations and reducing the assembly time of the trailer (its frame bearing structure) at the final point of transportation, in the possibility of disassembling the trailer for compact storage.

The technical result, which mediates the solution of this problem, consists in the operative detachability of the elements of the frame supporting structure of the trailer (the ability to quickly assemble and disassemble the frame supporting structure) while maintaining its spatial rigidity, characteristic of a non-separable (welded) frame supporting structure.

The technical result is achieved in that the frame supporting structure of the trailer of a car contains a rectangular support frame made of metal and intended for its detachable connection with the trailer wheel assembly, and a rectangular cargo frame made of metal and designed for detachable installation of the trailer body on it while the supporting frame contains spars and cross members attached to these spars by means of an integral connection, the cargo frame contains spars, as well as the front, the rear and at least one intermediate cross members attached to the spars of the cargo frame by means of a fixed detachable connection, in addition, the spars of the support frame are located under the spars of the cargo frame, parallel to the spars of the cargo frame and are attached to the spars of the cargo frame by means of a fixed detachable connection, and the length of the support spars of the support frames less than the length of the spars of the cargo frame.

The technical result is also achieved by the fact that:

- the side members and cross members of the cargo frame are beam profiles with a vertical orientation of their walls;

- at least one beam of the cargo frame contains at least one transverse stiffener attached to the wall and shelves of this beam by means of an integral connection;

- at least one beam of the cargo frame contains a longitudinal stiffener made in the form of a corresponding bend of the upper shelf of this beam;

- at least one beam of the cargo frame is made with holes in its wall, reducing the mass of this beam;

- each spar of the supporting frame is a beam of a channel profile, the wall of which is horizontal and the shelves are oriented downward relative to the wall, while this wall is conjugated and fastened by means of a fixed detachable connection with the lower shelf of the beam of the corresponding spar of the cargo frame;

- each cross member of the support frame is a box-shaped beam;

- said one-piece joints are made in the form of welding, and said fixed plug-in joints are made in the form of bolted joints.

The features of the claimed technical solution, distinctive from the prototype, are in the detachable connection between the elements of the cargo frame, as well as in the presence of a support frame, the elements of which are connected together inseparably, while the support frame is located under the cargo frame, the length of the spars of the support frame is less than the length of the cargo spars frames, spars of the supporting frame are detachably connected to the spars of the cargo frame.

Brief Description of the Drawings

In FIG. 1 schematically shows the claimed frame supporting structure, side view; in FIG. 2 schematically in plan shows separately the cargo (upper) frame; in FIG. 3 schematically in plan shows separately the supporting (lower) frame; in FIG. 4 shows a cross section of a beam of a spar of a cargo frame; in FIG. 5 shows a cross section of a beam of a cross member of a load frame; in FIG. 6 is a photograph of a fragment of a beam of a cross member of a cargo frame; in FIG. 7 shows a cross-section of a spar beam of a support frame; in FIG. 8 is a photograph of a fragment of a support frame, bottom view; in FIG. 9 shows (in cross section) the relative position of the beams of the respective cargo side members and supporting frames.

The implementation of the invention

The frame supporting structure of the trailer of the car contains interconnected cargo (upper) frame 1 and the support (lower) frame 2 (Fig. 1). The cargo frame 1 is made of metal, has a rectangular shape and is designed for detachable installation on it of a body and drawbar (not shown). The supporting frame 2 is made of metal, has a rectangular shape and is designed for detachable installation of a wheel assembly (not shown) on it.

The cargo frame 1 contains two spars 3, a front cross member 4, a rear cross member 5 and at least one intermediate cross member 6 (Fig. 2, where two cross members 6 are shown). The cross members 4, 5 and 6 are connected to the side members 3 by means of a fixed detachable connection, preferably a bolt (not shown).

In a preferred embodiment of the cargo frame 1, the side members 3 are beam profiles with a vertical orientation of their walls 7 and a horizontal orientation of their shelves 8 inward of the frame 1 (Fig. 4, 9). The beams of the cross members 4 and 5 have the same profile. As for the intermediate cross member 6, in the preferred embodiment of the frame 1, said cross member is a channel profile beam with a vertical orientation of its walls 9 and a horizontal orientation of its shelves 10 (Figs. 5, 6). In addition, the beam of the intermediate cross member 6 contains at least one longitudinal stiffener 11, made in the form of a corresponding bend of the upper shelf 10, as well as at least one transverse stiffener 12, attached to the wall 9 and the shelves 10 of this beam by means of an integral connection , namely, welding, and in the wall 9 of the beam holes 13 are made, reducing the mass of this beam (Fig. 5, 6).

In another possible embodiment of the cargo frame 1, the side members 3 and, possibly, the cross members 4, 5 are the beams shown in FIG. 5, 6. In a third possible embodiment of the load frame 1, the intermediate cross member 6 is the beam shown in FIG. four.

The support frame 2 contains two spars 14, the length of which is less than the length of the spars 3 of the cargo frame 1, namely, the length of the spar 14 is 20 ÷ 70% of the length of the spar 3, which is determined, on the one hand, by the need to install the trailer wheel springs on the spars 14 ( i.e., it is determined by the dimensions of the springs), and on the other hand, the need to minimize the weight and dimensions of the support frame 2 in order to simplify the transportation of the disassembled frame structure. In a preferred embodiment, the length of the spar 14 is chosen to be the smallest possible for the installation of the spring of the wheel assembly, which is determined by the size of this spring falling within the mentioned 20 ÷ 70% of the length of the spar 3. This condition provides a possible (determined by the size of the spring) minimization of the weight of the support frame 2, which simplifies its transportation as part of the designer of the frame supporting structure. The support frame 2 also contains at least two cross members 15, which are connected to the side members 14 by means of an integral connection, preferably by welding (Fig. 3, 8).

In this case, the side members 14 are channel beam profiles with a horizontal orientation of their walls 16 and a downward orientation of their shelves 17 (Figs. 7, 9), and the cross members 15 are box-shaped beams (Fig. 8). The beams of the side members 14 of the support frame 2 are located directly under the beams of the side members 3 of the cargo frame 1, parallel to them and at the same time connected to the lower shelves 8 of the beams of the side members 3 by means of a fixed detachable connection, namely a bolt connection (Fig. 9). In the wall 16 of the spar beam 14, holes 18 are made (Fig. 8), which are designed for bolting the wall 16 to the corresponding lower shelf 8 of the spar beam 3, as shown in FIG. 9. A plate 19 is fixed to the shelves 17 of the spar beam 14 at one end by welding, and through holes 20 are made at the other end in the shelves 17 (Fig. 8). The plate 19 and the holes 20 are designed for detachable attachment to this spar of the corresponding spring wheel assembly (spring is not shown). In addition, a pin 21 is mounted to the shelf 17 of the beam of the spar 14 by welding, oriented parallel to the cross members 15 towards the other spar 14 and intended for detachable mounting of the shock absorber of the wheel axis (the shock absorber is not shown).

The manufacture of the frame supporting structure of the trailer of a car (as well as the trailer as a whole) is carried out in three stages. At the first stage, carried out in the place of production of structural elements, structural elements are made: spars and cross members of the cargo frame with the corresponding fastening elements, the entire support frame using welding, as well as other trailer elements. At the second stage, the structural elements are packaged and transported in packaged form to the trailer assembly site. Then, at the third stage, at the assembly site, the trailer is completely assembled, which begins with the assembly of the frame supporting structure. To do this, spars 3 and cross members 4, 5, 6 of the cargo frame 1 are laid on the mounting table with the lower shelves up. Attach the cross members 4, 5, 6 to the side members 3 by means of a bolted connection. After that, a support frame 2 is mounted on top of the cargo frame 1 so that the spars 14 of the support frame with their walls 16 are directly located on the respective shelves 8 of the spars 3 of the cargo frame 1 and the holes 18 in the walls of the spars 14 are aligned with the corresponding holes in the shelves 8 of the spars 3 (last holes not shown). Then, using the aforementioned holes, with the help of bolts and nuts, they fasten the side members 14 of the support frame 2 with the side members 3 of the load frame 1. The frame supporting structure is ready. After that, other nodes and elements of the trailer are installed on it using the corresponding bolted connections.

Thus, in the claimed frame structure, welding is used only to connect the elements (spars and cross members) of the supporting frame 2 to each other. This is necessary to compensate for the decrease in the rigidity of the frame supporting structure due to the bolted connections between the elements (spars and cross members) of the load frame 1. When this, since the length of the side members 14 of the support frame 2 is significantly less than the length of the side members 3 of the load frame 1 (the length of the side members 14 is the minimum required for the installation of wheel springs on these side members evil trailer), the transportation of the support frame 2 in the preferred embodiment is carried out in assembled form. But it is also possible that the support frame 2 is made by welding in the third stage from the elements made in the first stage.

The structural rigidity is also reinforced by the longitudinal 11 and transverse 12 stiffening ribs of the beams of the cargo frame 1. Moreover, the presence of holes 13 in these beams reduces their weight and the mass of the overall frame supporting structure, which simplifies its transportation.

Claims (9)

1. The frame supporting structure of the trailer of a car, comprising a rectangular support frame made of metal and intended for its detachable connection with the trailer wheel assembly, and a rectangular cargo frame made of metal and designed for detachable installation of the trailer body on it, the support frame contains spars and cross members attached to these spars by means of an integral connection, the cargo frame contains spars, as well as the front, rear and at least one gap chnuyu cross member affixed to spars truck frame by means of a stationary plug connection, in addition, the spars of the support frame disposed under the spars Truck frame parallel spars truck frame and affixed to spars Truck frame by means of a stationary plug connection, and side members of the support frame length less the length of the spar Truck frame. 2. The frame supporting structure according to claim 1 is characterized in that the side members and cross members of the cargo frame are channel beam profiles with a vertical orientation of their walls. 3. The frame supporting structure according to claim 2 is characterized in that at least one beam of the cargo frame contains at least one transverse stiffener attached to the wall and shelves of this beam by means of an integral connection. 4. The frame supporting structure according to claim 2 is characterized in that at least one beam of the cargo frame contains a longitudinal stiffener, made in the form of a corresponding bend of the upper shelf of this beam. 5. The frame supporting structure according to claim 2 is characterized in that at least one beam of the cargo frame is made with holes in its wall, reducing the mass of this beam. 6. The frame bearing structure according to claim 1 is characterized in that each spar of the supporting frame is a channel beam profile, the wall of which is horizontal and the shelves are oriented downward relative to the wall, while this wall is conjugated and fastened by means of a fixed detachable connection with the lower shelf of the beam corresponding spar of the cargo frame. 7. The frame supporting structure according to claim 6 is characterized in that each cross member of the support frame is a box-shaped beam. 8. The frame supporting structure according to claim 1 or 3 is characterized in that said one-piece joints are made in the form of welding. 9. The frame supporting structure according to claim 1 or 6, characterized in that the said fixed detachable joints are made in the form of bolted joints.

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