Buffering mechanism of flat tractor

Abstract

The utility model relates to a buffering mechanism of a flat tractor. The buffering mechanism comprises an outer frame, an I-shaped frame and a top cover. The outer frame comprises a frame body and a first pin shaft part. A notch is formed in the first side face of the cavity of the frame body, a counter bore is formed in the second side face, and a spring is arranged in the counter bore. The I-shaped frame is arranged in the cavity of the frame body and comprises a block body and arm plates arranged at the four corners of the block body. Elastic deformation areas are formed in the middle of the outer wall face and the root of the inner wall face of the arm plate respectively. The end of the outer wall face of the arm plate makes contact with the first side face and the second side face. A boss is formed on the end face, facing the second side face, of the block body, and the end, extending out of the counter bore, of the spring sleeves the boss. A second pin shaft part which penetrates through the notch and extends outwards is formed on the end face, facing the first side face, of the block body. And the top cover is fixed at the upper port of the cavity. According to the utility model, the impact strength of the pin shaft part and the pin shaft can be reduced by means of a damping buffer mechanism formed by design in the actions of starting, walking, braking, turning, sudden stop and the like of the flat car.

Description

Technical Field

[0001] The utility model relates to a traction technology, in particular to a buffer mechanism for a flatbed tractor. Background Art

[0002] The tractor and the flatbed trailer are connected by a connecting frame to realize actions such as the tractor pulling the flatbed trailer straight, turning, going uphill and downhill. On the connecting frame connecting the tractor and the flatbed trailer, there are pin shaft parts respectively connected to the tractor and the flatbed trailer. Because the existing pin shaft part structure is relatively simple and is in the form of directly inserting a pin shaft into a pin hole to establish a connection. Therefore, during the processes of the tractor pulling the flatbed trailer (or flatbed vehicle) starting, braking, stopping, turning and other actions, the pin shaft will bear a relatively large impact and be subject to relatively large wear, which will affect the service life of the pin shaft and the pin shaft part, forming a potential safety hazard. Moreover, relatively large noises will also be generated. Summary of the Utility Model

[0003] Aiming at the problems that the connecting mechanism between the flatbed vehicle and the tractor is prone to wear the pin shaft and the pin shaft part and has relatively large impact noises during operation, the utility model provides a buffer mechanism for a flatbed tractor, which can, during the processes of the flatbed vehicle walking, braking, turning, making an emergency stop and other actions, with the help of the buffer mechanism arranged on the connecting frame, reduce the impact intensity on the pin shaft part and the pin shaft, contribute to achieving the purposes of prolonging the service life of the pin shaft part and the pin shaft, and improving the smoothness and reliability of the connection between the flatbed vehicle and the tractor.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a buffer mechanism for a flatbed tractor, including an outer frame, an I-shaped frame and a top cover.

[0005] The outer frame includes a frame body and a first pin shaft part, and the first pin shaft part is fixedly arranged outside the wall body of the frame body. On a pair of opposite surfaces of the cavity of the frame body, a notch is formed on a first side surface, a counterbore is formed on a second side surface and a spring is arranged in the counterbore, and the spring extends out of the counterbore.

[0006] The I-shaped frame is arranged in the cavity of the frame body and includes a block body and arm plates arranged at the four corner positions of the block body. Arc-shaped notch structures are respectively formed at the middle part of the outer wall surface and the root part of the inner wall surface of the arm plates, so that elastic deformation areas are formed at the two positions. The end parts of the outer wall surfaces of the arm plates are always in contact with the first side surface and the second side surface.

[0007] A convex platform is formed on the end surface of the block body facing the second side surface, and one end of the spring extending out of the counterbore is sleeved on the convex platform.

[0008] A second pin shaft part capable of passing through the notch and extending outwards is formed on the end surface of the block body facing the first side surface. The width of the notch is not less than the outer diameter of the second pin shaft part.

[0009] The top cover is fixed to the upper port of the cavity of the frame body.

[0010] Optionally, the notch is strip-shaped and the width of the notch is greater than the outer diameter of a section of the second pin shaft portion that is correspondingly matched at the notch. A groove is formed on the inner top surface of the top cover at a position corresponding to the notch, so that the groove can be relatively buckled with the notch to form a strip-shaped cavity.

[0011] The upper and lower parts of the outer peripheral surface of the second pin shaft portion are in corresponding contact with the upper and lower inner side walls of the cavity formed by the buckling of the notch and the groove. Preferably, the upper and lower parts of the outer peripheral surface of the second pin shaft portion are in tangential contact with the upper and lower inner side walls of the cavity formed by the buckling of the notch and the groove.

[0012] Optionally, a plurality of protrusions are distributed and formed on the first side around the notch. The protrusions extend toward the second side, and a notch is formed at the root of the protrusions, so that the protrusions can generate elastic bending deformation forward and backward at the root. The free end face of the protrusions is in contact with the block and the side of the arm plate facing the first side.

[0013] Optionally, the free end face of the protrusion is a convex spherical surface or a convex cylindrical body. The surfaces of the block and the arm plate facing the first side are in tangential contact with the convex spherical surface or the convex cylindrical body, forming a point-surface contact match or a line-surface contact match relationship.

[0014] Optionally, the protrusion is plate-shaped and the length direction of the plate extends along the depth direction of the cavity on the frame body. A notch formed at the root of the protrusion is a linear groove, and the length direction of the linear groove is along the depth direction of the cavity.

[0015] The thickness of the protrusion, that is, the front-back dimension, is 1 / 3 to 1 / 6 of the length of the protrusion.

[0016] Optionally, at least a section of the second pin shaft portion that is correspondingly matched with the notch is sleeved with an elastic sleeve. The elastic sleeve can be made of rubber, resin, composite polyester material, etc., and is used to increase elastic buffering, reduce friction and noise.

[0017] Optionally, an elastic connecting plate or a connecting spring can be provided between the two arm plates at the same end and between the ends of the opposite inner wall surfaces. The elastic connecting plate and the connecting spring can generate corresponding elastic deformation following the elastic deformation of the arm plate, and the deformation of the elastic connecting plate or the connecting spring mainly exists in the front-back direction.

[0018] The beneficial effects of the present utility model are as follows: The buffer mechanism of the flatbed tractor provided by the present utility model can, during the processes of the flatbed truck walking, braking, turning, making an emergency stop, etc., with the aid of the buffer mechanism provided on the connecting frame, reduce the impact strength on the pin shaft part and the pin shaft, contribute to achieving the technical purposes of extending the service life of the pin shaft part and the pin shaft, and improving the stability and reliability of the connection between the flatbed truck and the tractor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view structural schematic diagram of the present utility model (without a top cover).

[0020] Figure 2 It is a top view structural schematic diagram of the outer frame.

[0021] Figure 3 It is a top view structural schematic diagram of the I-shaped frame.

[0022] Figure 4 It is a top view structural schematic diagram of the present utility model.

[0023] In the figure: 100 tractor, 200 flatbed trailer; 10 outer frame, 11 frame body, 12 side one, 121 protrusion, 122 convex spherical surface, 123 notch, 124 groove; 13 side two, 131 counterbore, 14 pin shaft part one; 20 I-shaped frame, 21 block, 22 arm plate, 221 first elastic deformation area, 222 second elastic deformation area, 23 spring, 24 pin shaft part two; 30 top cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The structures, ratios, sizes, etc. shown in the attached drawings of the specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present utility model.

[0025] As Figures 1 to 4 shown, a buffer mechanism for a flatbed tractor includes an outer frame 10, an I-shaped frame 20, and a top cover 30.

[0026] The outer frame 10 includes a frame body 11 and a first pin shaft portion 14, and the first pin shaft portion 14 is fixedly arranged outside the wall body of the frame body 11. The first pin shaft portion 14 is matched with a tractor 100. In view of the matching structure between the first pin shaft portion 14 and the tractor 100, reference can be made to the prior art, so the detailed structure of the first pin shaft portion 14 will not be elaborated and is only schematic in the drawings.

[0027] Among the inner wall surfaces of the cavity of the frame body 11, the lengths of a pair of opposite left and right side surfaces (defined as the length direction) are greater than the lengths of a pair of opposite front and rear side surfaces (defined as the width direction). The two side surfaces in the length direction are respectively named side surface one 12 and side surface two 13. A notch 124 is formed on the side surface one 12, and a counterbore 131 is formed on the side surface two 13, and a spring 23 is arranged in the counterbore 131, so that one end of the spring 23 is inserted into the counterbore 131, and the other end extends out of the counterbore 131 relatively, to the outside of the counterbore 131.

[0028] The I-shaped frame 20 is arranged in the cavity of the frame body 11, and includes a block body 21 and arm plates 22 arranged at four corner positions of the block body 21. The lower end surface of the I-shaped frame 20 contacts the inner bottom surface of the upper cavity of the frame body 11. The top cover 30 is fixed at the upper port of the cavity of the frame body 11, and the upper end surface of the I-shaped frame 20 contacts the inner top surface of the top cover 30. The upper and lower end surfaces of the I-shaped frame 20, that is, the upper and lower end surfaces of the block body 21 and the upper and lower end surfaces of the arm plates 22.

[0029] Arc-shaped notch structures are respectively formed at the middle part of the outer wall surface and the root part of the inner wall surface of the arm plate 22, so that elastic deformation areas are formed at the two positions, that is, the elastic deformation area one 221 and the elastic deformation area two 222 shown in the drawings. The end of the outer wall surface of the arm plate 22 contacts the side surface one 12 and the side surface two 13.

[0030] A second pin shaft portion 24 that can extend outwards through the notch 124 is formed on the end surface of the block body 21 facing the side surface one 12. The width (inner diameter) of the notch 124 is greater than the outer diameter of the second pin shaft portion 24 (a section corresponding to the matching in the notch 124), and a radial distance is formed between the opposite surfaces of the notch 124 and the second pin shaft portion 24. The second pin shaft portion 24 is matched with a flatbed trailer 200. In view of the matching structure between the second pin shaft portion 24 and the flatbed trailer 200, reference can be made to the prior art, so the detailed structure of the second pin shaft portion 24 will not be elaborated and is only schematic in the drawings.

[0031] A boss is formed on the end surface of the block body 21 facing the side surface two 13, and the end of the spring 23 extending out of the counterbore 131 is sleeved on the boss.

[0032] On the inner top surface of the top cover 30, a groove is formed at a position corresponding to the notch 124. The groove can be relatively buckled with the notch 124 to form a hole cavity for the second pin portion 24 to pass through, so that the lower part of the outer wall of the second pin portion 24 contacts the lower part of the inner wall surface of the hole cavity. Therefore, it is only necessary to make the width of the notch 124 (the front-back dimension shown in the figure) larger than the outer diameter of the second pin portion 24, and the hole cavity formed by buckling the top cover 30 and the notch 124 is a long strip-shaped hole cavity.

[0033] In the above solution, a fixed connection is established between the outer frame 10 and the tractor 100. At the same time, a fixed connection is established between the I-shaped frame 20 and the flatbed trailer 200, and the tractor 100 and the flatbed trailer 200 are connected, so that the tractor 100 can tow the flatbed trailer 200 to move. Through the elastic matching structure formed between the outer frame 10 and the I-shaped frame 20, that is, the power transmission mechanism formed between the first pin portion 14 and the second pin portion 24 has damping and buffering capabilities. In this way, when the tractor 100 drives the flatbed trailer 200 to make turning, starting, sudden stopping and other actions, the existing inertia force will be resisted by the damping force transmission mechanism, so that a considerable part of the kinetic energy is offset, buffered and released, which helps to reduce the impact strength on the two pin portions and the pins matched therewith. The solution of the present invention not only helps to achieve the advantage of extending the service life of the pin portion and the pin, but also can improve the stability, reliability of the connection structure between the flatbed trailer 200 and the tractor 100, and the advantage of reducing noise.

[0034] On the first side 12 and around the notch 124, a plurality of protrusions 121 are distributed and formed. The protrusions 121 extend towards the second side 13, and an annular notch 123 is formed at the root of the protrusions 121, so that the protrusions 121 can elastically bend and deform at the root. The free end face of the protrusion 121 contacts the side faces of the block 21 and the arm plate 22 facing the first side 12, and can form a relatively larger contact surface between the I-shaped frame 20 and the first side 12, which can improve the transmission effect of the driving force between the outer frame 10 and the I-shaped frame 20. At the same time, a good flexible contact can be formed between the two opposite faces to suppress the adverse effects on the elastic deformation of the elastic deformation area on the arm plate 22.

[0035] The provided spring 23 can push the block 21, so that the surfaces of the block 21 and the arm plate 22 facing the first side 12 are pressed against the first side 12 and remain in contact with the end face of the protrusion 121.

[0036] Preferably, the free end face of the protrusion 121 can be an outwardly convex spherical surface 122, so that the surfaces of the block 21 and the arm plate 22 facing the side surface 12 are in tangential contact with the outwardly convex spherical surface 122.

[0037] An elastic connecting plate or a connecting spring can be provided between two arm plates 22 at the same end (front end and rear end) and between the ends of the opposite inner wall surfaces of the arm plates 22. Both the elastic connecting plate and the connecting spring can undergo elastic deformations adapted to them following the elastic deformations of the arm plates 22. The deformations occurring in the elastic connecting plate or the connecting spring mainly exist in the front-rear direction.

[0038] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. There are many aspects of the present invention that can be improved without departing from the overall idea. Those familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A buffer mechanism for a flatbed tractor, characterized in that: Including outer frame, I-frame and top cover; The outer frame includes a frame body and a pin shaft part 1, and the pin shaft part 1 is fixedly arranged outside the wall of the frame body; a notch is formed on the side surface 1 and the side surface 2 of the cavity of the frame body, a countersunk hole is formed on the side surface 1, and a spring is arranged in the countersunk hole, so that the spring extends out of the countersunk hole; The I-shaped frame is arranged in the cavity of the frame body, and includes a block body and arm plates arranged at the four corners of the block body; arc-surface concave structures are respectively formed at the middle of the outer wall surface of the arm plate and at the root of the inner wall surface, so that elastic deformation zones are formed at the two positions; the end of the outer wall surface of the arm plate is in contact with the side surface one and the side surface two; a pin shaft part two that can pass through the notch and extend outward is formed on the end surface of the block body facing the side surface one, and the width of the notch is not less than the outer diameter of the pin shaft part two; a boss is formed on the end surface of the block body facing the side surface two, and one end of the spring extending out of the countersunk hole is sleeved on the boss; The top cover is fixed to the upper port of the cavity of the frame body.

2. The buffer mechanism of the flatbed tractor according to claim 1, characterized in that: The notch is in the shape of an elongated strip and the width of the notch is greater than the outer diameter of a section of the second pin shaft portion that matches the notch; A groove is formed on the inner top surface of the top cover at a position corresponding to the notch, so that the groove and the notch are relatively buckled to form a long strip-shaped cavity.

3. The buffer mechanism of the flatbed tractor according to claim 2, characterized in that: The upper and lower parts of the outer peripheral surface of the second pin shaft part are in tangential contact with the upper inner wall and the lower inner wall of the hole cavity formed by the snap fit of the notch and the groove.

4. The buffer mechanism of the flatbed tractor according to claim 1, characterized in that: A plurality of protrusions are formed on the first side and distributed around the periphery of the notch; The protrusion extends toward the second side and an annular notch is formed at the root of the protrusion, so that the protrusion can undergo elastic deformation toward the front and rear sides at the root; the free end of the protrusion contacts the side of the block and the arm plate toward the first side.

5. The buffer mechanism of the flatbed tractor according to claim 4, characterized in that: The free end surface of the protrusion is an external convex spherical surface or an external convex cylindrical surface; the surfaces of the block and the arm plate facing the side surface one are tangentially in contact with the external convex spherical surface or the external convex cylindrical surface.

6. The buffer mechanism of the flatbed tractor according to claim 4, characterized in that: The protrusion is in the shape of a plate, and the length direction of the plate extends along the depth direction of the upper cavity of the frame body.

7. The buffer mechanism of a flatbed tractor according to any one of claims 1 to 6, characterized in that: An elastic sleeve is sleeved on at least a section of the second pin shaft portion that corresponds to and matches the notch.

8. The buffer mechanism of a flatbed tractor according to any one of claims 1 to 6, characterized in that: An elastic connecting plate or a connecting spring is arranged between two arm plates at the same end and between the ends of opposite inner wall surfaces; the elastic connecting plate and the connecting spring can be elastically deformed along with the elastic deformation of the arm plates.

Images