Traction pin device of semitrailer

Abstract

The utility model discloses a semitrailer traction pin device, which relates to the technical field of semitrailers and comprises a traction pin body and a traction pin seat, the traction pin body is connected with the traction pin seat through bolts, and the traction pin seat is respectively provided with an anti-loosening mechanism corresponding to each bolt. The anti-loosening mechanism comprises an elastic piece and an anti-loosening piece, one end of the elastic piece is connected with the traction pin base, and the other end of the elastic piece is connected with the anti-loosening piece. The anti-loosening piece comprises a clamping part, and the bolt head is provided with a clamping structure capable of being matched with the clamping part in a clamping mode. According to the semitrailer traction pin device, the anti-loosening mechanism is arranged on the traction pin base, elastic force is applied to the anti-loosening piece through the elastic piece, the clamping portion of the anti-loosening piece is matched with the clamping structure of the head of the bolt in a clamped mode, the bolt is effectively prevented from falling off due to vibration in the vehicle running process, and the safety and reliability of the semitrailer traction pin device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a half trailer technical field, especially a half trailer traction pin device. BACKGROUND

[0002] Traction pin is an important component for connecting tractor and trailer in half trailer. At present, traction pin can be divided into two kinds of welding type and assembly type according to assembly mode.

[0003] Welding type traction pin has the advantage of not easy to fall off, but has the disadvantage of inconvenient disassembly. When traction pin is locally damaged, welding seam needs to be cut, and traction pin needs to be replaced as a whole, so that operation is inconvenient, and maintenance cost is high.

[0004] And although assembly type traction pin is convenient to disassemble, but in use, fastening screw and other fastening connecting parts vibrate along with vehicle running, are easy to fall off after long time work, and have great safety hidden danger. Therefore, it has important practical significance to research and develop a traction pin device capable of effectively preventing screw from falling off. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a half trailer traction pin device capable of effectively preventing screw from falling off in view of the problem of screw easy to fall off of the existing assembly type traction pin device.

[0006] In order to achieve the above purpose, the utility model provides a half trailer traction pin device, which comprises a traction pin body and a traction pin seat, the traction pin body is connected with the traction pin seat through bolts, and a loosening prevention mechanism is arranged on the traction pin seat corresponding to each bolt; the loosening prevention mechanism comprises an elastic member and a loosening prevention member, one end of the elastic member is connected with the traction pin seat, and the other end is connected with the loosening prevention member; the loosening prevention member comprises a clamping part, the bolt head has a clamping structure capable of clamping cooperation with the clamping part; the elastic member is configured to apply elastic force to the loosening prevention member, so that the clamping part has a tendency to move towards the corresponding bolt, and the bolt is prevented from falling off due to vibration.

[0007] Preferably, the loosening prevention mechanism further comprises a mounting column and a fixing column, the mounting column and the fixing column are fixedly installed on the traction pin seat, the elastic member is a torsional spring installed on the mounting column, one end of the torsional spring abuts against the fixing column, and the other end is fixedly connected with the loosening prevention member. Such setting enables the elastic member to be stably installed on the traction pin seat, and through the elastic force of the torsional spring, force towards the bolt is continuously applied to the loosening prevention member, so that the clamping effect of the clamping part and the clamping structure is guaranteed.

[0008] Preferably, the mounting column is provided with a insertion hole, and a pin shaft for limiting the elastic member from separating from the mounting column is inserted in the insertion hole. The setting of the pin shaft can prevent the elastic member from falling off from the mounting column during work, and improve the reliability of the loosening prevention mechanism.

[0009] Preferably, the anti-loosening piece further comprises a connecting portion, one end of the connecting portion being connected with the elastic piece, and the other end being connected with the clamping portion. The connecting portion connects the elastic piece and the clamping portion into a whole, so that the elastic force of the elastic piece can be effectively transmitted to the clamping portion, and the clamping portion can be accurately matched with the clamping structure of the bolt head.

[0010] Preferably, the anti-loosening mechanism further comprises an intercepting column, the intercepting column being fixedly installed on the towing pin seat and being used for contacting and matching with the connecting portion. The intercepting column is used for limiting the connecting portion when the bolt is disassembled, so that the clamping portion is away from the position of the bolt mounting hole on the towing pin body, and the clamping portion will not hinder the disassembly of the bolt.

[0011] Preferably, the elastic piece can move up and down along the axis direction of the mounting column; when the elastic piece is at the upper dead point, the connecting portion can rotate around the mounting column and contact with the intercepting column, and when the intercepting column abuts against the end face of the connecting portion on the side corresponding to the bolt, the vertical projection of the anti-loosening piece on the towing pin body does not coincide; when the elastic piece is at the lower dead point, the top end of the connecting portion is lower than the bottom end of the intercepting column, and the clamping portion is higher than the bottom end of the clamping structure. This design can make the elastic piece flexibly contact and match with the intercepting column through up and down movement and rotation when the bolt is installed and disassembled, so that the position of the anti-loosening piece can be conveniently adjusted, the loosening effect is ensured, and the operation of disassembling the bolt and the towing pin body is facilitated.

[0012] Preferably, the clamping structure is a hexagonal head structure, a square head structure or a T-shaped head structure. These common clamping structures can be well matched with the clamping portion of the anti-loosening piece, so that reliable clamping can be realized and the bolt can be prevented from falling off.

[0013] Preferably, the clamping portion has a clamping groove matched with the clamping structure. The clamping groove can be accurately matched with the clamping structure of the bolt head, so that the stability and reliability of clamping are enhanced.

[0014] The beneficial effects of the technical scheme are as follows:

[0015] By arranging the anti-loosening mechanism on the towing pin seat, the elastic piece is used to apply elastic force to the anti-loosening piece, so that the clamping portion of the anti-loosening piece is clamped and matched with the clamping structure of the bolt head. Therefore, the bolt can be effectively prevented from falling off due to vibration during vehicle driving, and the safety and reliability of the towing pin device of the semitrailer are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The three-dimensional view of the towing pin device of the semitrailer provided by the embodiment of the present application Figure 1 ;

[0017] Figure 2 The partial local enlarged view of A in FIG. 4 Figure 1 ; and ; and

[0018] Figure 3 The use state diagram of the semi-trailer draw pin device is provided for the embodiment of the utility model;

[0019] Figure 4 The bottom view of the semi-trailer draw pin device is provided for the embodiment of the utility model Figure 1 The card joint part and the card joint structure are in the card joint state.

[0020] Figure 5 The bottom view of the semi-trailer draw pin device is provided for the embodiment of the utility model Figure 2 The card joint part and the card joint structure are in the separation state.

[0021] Figure 6 The three-dimensional view of the semi-trailer draw pin device is provided for the embodiment of the utility model Figure 2 ;

[0022] Figure 7 The front view of the semi-trailer draw pin device is provided for the embodiment of the utility model.

[0023] In the figure, 1, draw pin body; 2, draw pin seat; 3, bolt; 31, card joint structure; 4, anti-loosening mechanism; 41, elastic piece; 42, anti-loosening piece; 421, card joint part; 422, connecting part; 43, mounting column; 44, fixed column; 45, pin shaft; 46, intercepting column. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] Please refer to Figures 1 to 7 The embodiment of the application provides a kind of semi-trailer draw pin device, including draw pin body 1 and draw pin seat 2, draw pin body 1 is connected with draw pin seat 2 by bolt 3, as shown in Figure 3 Draw pin seat 2 is fixedly connected with the frame of semi-trailer, draw pin seat 2 is provided with anti-loosening mechanism 4 corresponding to each bolt 3;Bolt 3 and anti-loosening mechanism 4 are all set to eight;Anti-loosening mechanism 4 includes elastic piece 41 and anti-loosening piece 42, one end of elastic piece 41 is connected with draw pin seat 2, and the other end is fixedly connected with anti-loosening piece 42, and specific can be realized fixed connection by welding mode, or by the mode of fastener fixed.

[0026] The anti-loosening piece 42 comprises a clamping portion 421, and the head of the bolt 3 has a clamping structure 31 capable of clamping with the clamping portion 421; the elastic piece 41 is configured to apply elastic force to the anti-loosening piece 42, so that the clamping portion 421 has a tendency to move towards the corresponding bolt 3, preventing the bolt 3 from falling off due to vibration.

[0027] The clamping structure 31 is a hexagonal head structure, a square head structure or a T-shaped head structure. The bolt 3 can be a hexagonal head bolt 3, a square head bolt 3 or a T-shaped head bolt 3. The clamping structure 31 is the head structure of the bolt 3. The clamping structure 31 of the head of the hexagonal head bolt 3 is a hexagonal head structure, the clamping structure 31 of the head of the square head bolt 3 is a square head structure, and the clamping structure 31 of the head of the T-shaped head bolt 3 is a T-shaped head structure. The clamping structure 31 of the present embodiment is preferably a hexagonal head structure, and the bolt 3 is a flange hexagonal head bolt 3. These common bolts 3 themselves have clamping structures 31, which can well cooperate with the clamping portion 421 of the anti-loosening piece 42, realize reliable clamping, and prevent the bolt 3 from falling off.

[0028] In order to facilitate the stable clamping of the clamping portion 421 and the clamping structure 31, thereby limiting the rotation of the bolt 3, the clamping portion 421 is provided with a clamping groove capable of clamping with the clamping structure 31. The clamping groove can accurately cooperate with the clamping structure 31 of the head of the bolt 3, thereby enhancing the stability and reliability of clamping. In the present embodiment, the clamping groove is a U-shaped groove structure adapted to the hexagonal head structure.

[0029] In order to facilitate the installation of the elastic piece 41, the anti-loosening mechanism 4 further comprises a mounting column 43 and a fixing column 44, both of which are fixedly installed on the traction pin seat 2. The elastic piece 41 is a torsion spring installed on the mounting column 43, one end of which abuts against the fixing column 44, and the other end is fixedly connected with the anti-loosening piece 42. The fixing column 44 limits the torsion of one end of the elastic piece 41. Such a configuration enables the elastic piece 41 to be stably installed on the traction pin seat 2, and through the elastic force of the torsion spring, continuously applies force to the anti-loosening piece 42 towards the bolt 3, thereby ensuring the clamping effect of the clamping portion 421 and the clamping structure 31. Moreover, the elastic piece 41 can also axially move on the mounting column 43 and the fixing column 44.

[0030] In order to avoid the elastic piece 41 from being detached from the mounting column 43, the mounting column 43 is provided with a insertion hole, and a pin shaft 45 for limiting the elastic piece 41 from being detached from the mounting column 43 is inserted into the insertion hole. The pin shaft 45 can prevent the elastic piece 41 from falling off from the mounting column 43 during work, thereby improving the reliability of the anti-loosening mechanism 4. The pin shaft 45 is a pin shaft 45 with a through hole at the tail end, and the through hole is passed through a mounting cotter pin, so that the pin shaft 45 cannot be detached from the insertion hole.

[0031] The anti-loosening piece 42 further comprises a connecting portion 422, one end of which is connected with the elastic piece 41, and the other end of which is connected with the clamping portion 421. The connecting portion 422 connects the elastic piece 41 and the clamping portion 421 into an integral whole, so that the elastic force of the elastic piece 41 can be effectively transmitted to the clamping portion 421, and the clamping portion 421 can be accurately matched with the clamping structure 31 of the head of the bolt 3.

[0032] In order to avoid that the clamping portion 421 moves to the bolt 3 when the bolt 3 is disassembled, the anti-loosening mechanism 4 further comprises an intercepting column 46, which is fixedly installed on the traction pin seat 2 and is used to contact and match with the connecting portion 422. The intercepting column 46 is used to limit the connecting portion 422 when the bolt 3 is disassembled, so that the clamping portion 421 is away from the position of the bolt 3 mounting hole on the traction pin body 1, and the clamping portion 421 is not located at the position of the bolt 3 mounting hole, so as not to hinder the disassembly of the bolt 3.

[0033] The elastic piece 41 can move up and down along the axis direction of the mounting column 43; when the elastic piece 41 is located at the upper dead point, the connecting portion 422 can rotate around the mounting column 43 and contact with the intercepting column 46, and when the intercepting column 46 and the connecting portion 422 abut against the end face on the side corresponding to the bolt 3, the vertical projection of the anti-loosening piece 42 does not coincide with the traction pin body 1; when the elastic piece 41 is located at the lower dead point, the elastic piece 41 abuts against the pin shaft 45, the pin shaft 45 limits the elastic piece 41 from continuing to descend so as to avoid that the elastic piece 41 is separated from the mounting column 43, and at this time, the top end of the connecting portion 422 is lower than the bottom end of the intercepting column 46, and the clamping portion 421 is higher than the bottom end of the clamping structure 31. When the elastic piece 41 moves between the lower dead point and the upper dead point, the clamping portion 421 is always at a height that can be clamped with the clamping structure 31. When the clamping portion 421 is clamped with the clamping structure 31, the movable elastic piece 41 can still move between the lower dead point and the upper dead point, but if the clamping portion 421 is to be separated from the clamping structure 31, the anti-loosening piece 42 needs to be rotated, so that the elastic piece 41 is deformed.

[0034] This design makes it possible to flexibly contact and match with the intercepting column 46 through the up-and-down movement and rotation of the elastic piece 41 when the bolt 3 is installed and disassembled, and the position of the anti-loosening piece 42 can be conveniently adjusted, which not only ensures the anti-loosening effect, but also facilitates the operation of disassembling the bolt 3 and the traction pin body 1.

[0035] In actual use, when the bolt 3 needs to be installed, the elastic member 41 is moved downward to the lower dead point, the anti-loosening member 42 is rotated, the connecting portion 422 is rotated to the side of the intercepting column 46 which is away from the bolt 3, at this time, the vertical projection of the anti-loosening member 42 does not coincide with the traction pin body 1, then the elastic member 41 is moved upward to the upper dead point, at this time, the anti-loosening member 42, under the elastic force of the elastic member 41, the connecting portion 422 abuts against the intercepting column 46, the friction force between the anti-loosening member 42 and the intercepting column 46 is far greater than the gravity, so the anti-loosening member 42 will not descend due to gravity, thereby the position of the anti-loosening member 42 is limited.

[0036] At this time, the vertical projection of the anti-loosening member 42 does not coincide with the traction pin body 1, which facilitates the bolt 3 to pass through the connecting holes of the traction pin body 1 and the traction pin seat 2 and be tightened.

[0037] After the bolt 3 is installed, the elastic member 41 is moved downward to the lower dead point, at this time, the connecting portion 422 is separated from the intercepting column 46, the elastic force of the elastic member 41 makes the clamping groove of the clamping portion 421 clamp the clamping structure 31 of the head of the bolt 3, and the anti-loosening function is realized.

[0038] When the bolt 3 needs to be disassembled, referring to the operation in the installation process, the anti-loosening member 42 is rotated to the position away from the bolt 3, and the connecting portion 422 is abutted against by the intercepting column 46, so that the anti-loosening member 42 is separated from the clamping structure 31 of the head of the bolt 3, and the bolt 3 can be conveniently disassembled.

[0039] The utility model discloses a traction pin seat 2 is provided with anti-loosening mechanism 4, utilizes the elastic member 41 to the anti-loosening member 42 and applies elastic force, makes the clamping portion 421 of anti-loosening member 42 and the clamping structure 31 of the head of bolt 3 clamping cooperation, effectively prevented the bolt 3 from falling off in the process of driving due to vibration, improved the safety and reliability of semi-trailer traction pin device. Meanwhile, through setting up mounting column 43, fixed column 44, pin shaft 45, intercepting column 46 etc. The structure of anti-loosening mechanism 4 is more reasonable, and the operation of disassembling bolt 3 and traction pin body 1 is more convenient, has good practicality and popularization value.

[0040] In the utility model, unless another definite provision and limit, the terms "installation", "link", "connection", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limit. For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

Claims

1. A semi-trailer draw pin arrangement comprising a draw pin body (1) and a draw pin seat (2), the draw pin body (1) being connected to the draw pin seat (2) by means of a bolt (3), characterised in that: The traction pin seat (2) is provided with an anti-loosening mechanism (4) corresponding to each bolt (3); the anti-loosening mechanism (4) comprises an elastic member (41) and an anti-loosening member (42), one end of the elastic member (41) is connected with the traction pin seat (2), and the other end is connected with the anti-loosening member (42); the anti-loosening member (42) comprises a clamping portion (421), the head of the bolt (3) has a clamping structure (31) capable of clamping with the clamping portion (421); the elastic member (41) is configured to apply elastic force to the anti-loosening member (42), so that the clamping portion (421) has a tendency to move towards the corresponding bolt (3).

2. The semi-trailer drawpin arrangement of claim 1, characterised in that, The anti-loosening mechanism (4) further comprises a mounting column (43) and a fixing column (44), both of which are fixedly installed on the traction pin seat (2), and the elastic member (41) is a torsion spring installed on the mounting column (43), one end of the torsion spring abuts against the fixing column (44), and the other end is fixedly connected with the anti-loosening member (42).

3. The semi-trailer drawpin arrangement of claim 2, characterised in that, The mounting column (43) is provided with a insertion hole, and a pin shaft (45) for limiting the elastic member (41) from being separated from the mounting column (43) is inserted in the insertion hole.

4. The semi-trailer drawpin arrangement of claim 3, characterised in that, The anti-loosening member (42) further comprises a connecting portion (422), one end of the connecting portion (422) is connected with the elastic member (41), and the other end is connected with the clamping portion (421).

5. The semi-trailer drawpin arrangement of claim 4, characterised in that, The anti-loosening mechanism (4) further comprises an intercepting column (46), which is fixedly installed on the traction pin seat (2), and the intercepting column (46) is used for contact cooperation with the connecting portion (422).

6. The semi-trailer drawpin arrangement of claim 5, characterised in that, The elastic member (41) can move up and down along the axis direction of the mounting column (43); when the elastic member (41) is at the upper dead point, the connecting portion (422) can rotate around the mounting column (43) and contact the intercepting column (46), and when the intercepting column (46) abuts against the end face of the connecting portion (422) on the side of the corresponding bolt (3), the vertical projection of the anti-loosening member (42) does not coincide with the traction pin body (1); when the elastic member (41) is at the lower dead point, the top end of the connecting portion (422) is lower than the bottom end of the intercepting column (46), and the clamping portion (421) is higher than the bottom end of the clamping structure (31).

7. The semi-trailer drawpin arrangement of claim 1 wherein, The clamping structure (31) is a hexagonal head structure, a square head structure or a T-shaped head structure.

8. The semi-trailer drawpin arrangement according to claim 7, characterized in that The clamping portion (421) has a clamping groove capable of clamping with the clamping structure (31).

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