Adjustable pull rod for semitrailer

Abstract

An adjustable pull rod for a semitrailer comprises a pull rod part, connecting parts located at the two ends of the pull rod part and a clamping assembly located between the pull rod part and the connecting parts, and the pull rod part and the clamping assembly are connected in a threaded meshing mode. The clamping assembly comprises a clamping body, an elastic groove is formed in the side face of the clamping body, two wing plates are arranged on the clamping body, the two wing plates are located on the two sides of the elastic groove, the two wing plates are connected through the bolt assembly, one end of the special-shaped bolt is closed, and two original independent bolts are combined into the whole U-shaped bolt. And secondly, a traditional nut is transformed, so that the two nuts interfere with each other, it is guaranteed that the bolt is locked more tightly and cannot be loosened due to vibration, and therefore the fastening of a clamping body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and more particularly to an adjustable pull rod for a semi-trailer. Background Art

[0002] The function of the semi-trailer suspension tie rod is to improve the rigidity of the vehicle itself and improve stability when cornering at high speed. It plays a pulling role on the suspension spring, and it will pull the entire leaf spring so that the connection between the leaf spring and the bracket will not be broken, thereby improving stability when cornering. At present, the semi-trailer suspension tie rod includes a tie rod, a connecting head at both ends of the tie rod, and a clamping assembly between the tie rod and the connecting head. The clamping assembly includes two symmetrical clamping bodies and a clamping bolt. The clamping bolt is used to fix the clamping body on the tie rod. The existing semi-trailer suspension tie rod can adjust the length of the tie rod itself according to the specific working conditions, and completes the installation by adjusting the connecting rod in the middle of the tie rod and then clamping it with bolts on both sides. Therefore, the bolt is the force-bearing part of the entire tie rod.

[0003] In current use, there is an obvious problem, that is, since the tires are clamped by threaded bolts, the bolts will become loose due to time and vibration during use, resulting in thread slippage. If this continues for a long time, it will cause uneven tire wear. Utility Model Content

[0004] One advantage of the present invention is that it provides an adjustable pull rod for a semi-trailer. One end of the special-shaped bolt is closed, and the two original separate bolts are combined into an integral U-shaped bolt, which ensures that the bolt will not rotate due to vibration. Secondly, the traditional nut is modified so that the two nuts interfere with each other, which ensures that the bolt is locked more tightly and will not loosen due to vibration, thereby ensuring the tightness of the engaging body.

[0005] To achieve at least one of the above advantages of the present invention, the present invention provides an adjustable tie rod for a semi-trailer, comprising a tie rod portion, connecting portions located at both ends of the tie rod portion, and a clamping assembly located between the tie rod portion and the connecting portions, wherein the tie rod portion and the clamping assembly are connected by threaded engagement;

[0006] The clamping assembly includes a clamping body, a side of which is provided with an elastic groove, and two wing plates are provided on the clamping body. The two wing plates are located on both sides of the elastic groove and are connected by a bolt assembly;

[0007] The bolt assembly includes a U-shaped bolt and a first nut and a second nut connected to the U-shaped bolt through thread engagement.

[0008] According to an embodiment of the present invention, two screw holes adapted to fit the U-bolts are provided on the wing plate.

[0009] According to an embodiment of the present invention, a second through hole is provided in the middle of the second nut, and a second thread and a second inclined surface are provided on the inner side surface of the second through hole.

[0010] According to one embodiment of the present invention, a first through hole is provided in the middle of the first nut, a first thread is provided on the inner side of the first through hole, a first inclined surface adapted to the second inclined surface is provided on the first nut, and a plurality of separation slits are provided on the first inclined surface.

[0011] According to an embodiment of the present invention, the inclination angle of the first inclined surface is slightly greater than the inclination angle of the second inclined surface.

[0012] According to an embodiment of the present invention, an elastic hole is provided on the engaging body, the elastic hole is communicated with one end of the elastic groove, and the other end of the elastic groove is connected to the edge of the engaging body.

[0013] According to one embodiment of the present invention, the connecting portion includes a connecting head and a pull ring arranged at one end of the connecting head, the other end of the connecting head is fixedly connected to the locking body, a blind hole is provided inside the locking body, and an inner side surface of the blind hole is provided with an internal thread.

[0014] According to an embodiment of the present invention, the pull rod portion includes a rod body, and both ends of the rod body are provided with external threads that are compatible with the internal threads.

[0015] According to an embodiment of the present invention, a plane is provided in the middle of the rod body.

[0016] According to an embodiment of the present invention, a groove adapted to fit the U-bolt is provided on the wing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is an exploded view of the structure of the utility model;

[0019] Figure 3 This is a top view of the second nut of the utility model;

[0020] Figure 4 This is a side view of the second nut of the utility model;

[0021] Figure 5 This is a top view of the first nut of the utility model;

[0022] Figure 6 This is a side view of the first nut of the utility model;

[0023] In the accompanying drawings: 1. pull ring, 2. connecting head, 3. snap-fitting body, 4. external thread, 5. rod body, 6. wing plate, 7. groove, 8. screw hole, 9. elastic hole, 10. elastic groove, 11. U-bolt, 12. second nut, 13. first nut, 14. second thread, 15. second bevel, 16. first bevel, 17. first thread. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following will be combined with the appendix of the present invention. Figure 1 ~Attached Figure 6 , the utility model is described in more detail.

[0025] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0026] Those skilled in the art should understand that, in the disclosure of the specification, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0027] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0028] The utility model provides an adjustable pull rod for a semi-trailer, comprising a pull rod portion, a connecting portion located at both ends of the pull rod portion, and a clamping assembly located between the pull rod portion and the connecting portion, wherein the pull rod portion and the clamping assembly are connected by a threaded engagement manner; the clamping assembly comprises a clamping body 3, a side surface of the clamping body 3 is provided with an elastic groove 10, two wing plates 6 are provided on the clamping body 3, the two wing plates 6 are located on both sides of the elastic groove 10, and the two wing plates 6 are connected by a bolt assembly; the bolt assembly comprises a U-bolt 11 and a first nut 13 and a second nut 12 connected thereto by threaded engagement; the wing plate 6 is provided with two screw holes 8 adapted to the U-bolt 11; a second through hole is provided in the middle of the second nut 12, and a second thread 14 and a second inclined surface 15 are provided on the inner side surface of the second through hole; the middle portion of the first nut 13 is provided with a second screw thread 14 and a second inclined surface 15 A through hole, the inner side surface of the first through hole is provided with a first thread 17, the first nut 13 is provided with a first bevel 16 adapted to the second bevel 15, and the first bevel 16 is provided with a plurality of separation seams; the inclination angle of the first bevel 16 is slightly larger than the inclination angle of the second bevel 15; an elastic hole 9 is provided on the engaging body 3, the elastic hole 9 is connected to one end of the elastic groove 10, and the other end of the elastic groove 10 is connected to the edge of the engaging body 3; the connecting part includes a connecting head 2 and a pull ring 1 provided at one end of the connecting head 2, the other end of the connecting head 2 is fixedly connected to the engaging body 3, a blind hole is provided inside the engaging body 3, and an internal thread is provided on the inner side surface of the blind hole; the pull rod part includes a rod body 5, both ends of the rod body 5 are provided with external threads 4 adapted to the internal threads; a plane is provided in the middle of the rod body 5; a groove 7 adapted to the U-bolt 11 is provided on the wing plate 6.

[0029] The first embodiment of the present utility model is as follows:

[0030] The invention relates to an adjustable pull rod for a semi-trailer, comprising a pull rod portion, connecting portions located at both ends of the pull rod portion and a clamping assembly located between the pull rod portion and the connecting portion, the connecting portion comprising a connecting head 2 and a pull ring 1 arranged at one end of the connecting head 2, the other end of the connecting head 2 is fixedly connected to a clamping body 3, a blind hole is arranged inside the clamping body 3, and an inner side surface of the blind hole is provided with an internal thread, the pull rod portion comprises a rod body 5, both ends of the rod body 5 are provided with external threads 4 adapted to the internal threads, the pull rod portion and the clamping assembly are connected by threaded engagement, a plane is provided in the middle of the rod body 5, when in use, connecting portions are provided at both ends of the rod body 5 by engaging the internal thread and the external thread 4, and then the U-bolt 11 is tightened to make the internal thread and the external thread 4 tightly engaged, when the length needs to be adjusted, the U-bolt 11 is loosened to a certain extent, and then a wrench is used to clamp the plane and rotate the rod body 5.

[0031] The clamping assembly includes a clamping body 3, and an elastic groove 10 and an elastic hole 9 are provided on the side of the clamping body 3. The elastic hole 9 is connected to one end of the elastic groove 10, and the other end of the elastic groove 10 is connected to the edge of the clamping body 3, so that the clamping body 3 has a certain elasticity, so that when the U-bolt 11 is tightened, the clamping body 3 can hold the internal thread tightly. The clamping body 3 is provided with two wing plates 6, which are located on both sides of the elastic groove 10 and are connected by a bolt assembly;

[0032] Two screw holes 8 are provided on the wing plate 6 and are compatible with the U-shaped bolt 11. The bolt assembly includes a U-shaped bolt 11 and a first nut 13 and a second nut 12 connected thereto by threaded engagement. A second through hole is provided in the middle of the second nut 12, and a second thread 14 and a second inclined surface 15 are provided on the inner side surface of the second through hole. A first through hole is provided in the middle of the first nut 13, and a first thread 17 is provided on the inner side surface of the first through hole. A first inclined surface 16 is provided on the first nut 13 and is compatible with the second inclined surface 15. A plurality of separating slits are provided on the first inclined surface 16.

[0033] The first nut 13 and the second nut 12 form a tightening nut, and the internal threads of the two are at the same distance as the threads on the U-bolt 11, and are connected by meshing. When in use, the first nut 13 is first tightened on the U-bolt 11, and then the second nut 12 is tightened on the second nut 12. Since the inclination angle of the first inclined surface 16 is slightly larger than the inclination angle of the second inclined surface 15, when tightening, the second inclined surface 15 will squeeze the first inclined surface 16, so that the first nut 13 holds the U-bolt 11 tighter. At the same time, the first nut 13 and the second nut 12 will have interference, and will not loosen even when encountering vibration. The first nut 13 is supported by the second nut 12 and will not loosen. The second nut 12 will not loosen due to the static friction between the first inclined surface 16 and the second inclined surface 15, thereby ensuring that the distance between the two wing plates 6 does not change, so that the external thread 4 can always hold the internal thread.

[0034] The wing plate 6 is provided with a groove 7 adapted to the U-bolt 11 , and the middle portion of the U-bolt 11 is embedded in the groove 7 to improve the fixing degree.

[0035] It should be noted that the terms "first, second and third" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0036] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles herein.

Claims

1. An adjustable pull rod for a semi-trailer, characterized by: It includes a pull rod portion, connecting portions located at both ends of the pull rod portion, and a clamping assembly located between the pull rod portion and the connecting portions, wherein the pull rod portion and the clamping assembly are connected by threaded engagement; The clamping assembly includes a clamping body, a side of which is provided with an elastic groove, and two wing plates are provided on the clamping body. The two wing plates are located on both sides of the elastic groove, and the two wing plates are connected by a bolt assembly; The bolt assembly includes a U-bolt and a first nut and a second nut connected to the U-bolt by threaded engagement.

2. The adjustable tie rod for a semi-trailer according to claim 1, characterized in that: The wing plate is provided with two screw holes adapted to the U-bolts.

3. The adjustable tie rod for a semi-trailer according to claim 1, characterized in that: A second through hole is provided in the middle of the second nut, and a second thread and a second inclined surface are provided on the inner side surface of the second through hole.

4. The adjustable tie rod for a semitrailer according to claim 3, characterized in that: A first through hole is provided in the middle of the first nut, a first thread is provided on the inner side of the first through hole, a first inclined surface matched with the second inclined surface is provided on the first nut, and a plurality of separation slits are provided on the first inclined surface.

5. The adjustable tie rod for a semitrailer according to claim 4, characterized in that: The inclination angle of the first inclined surface is slightly greater than the inclination angle of the second inclined surface.

6. The adjustable tie rod for a semitrailer according to claim 1, characterized in that: The engaging body is provided with an elastic hole, the elastic hole is communicated with one end of the elastic groove, and the other end of the elastic groove is connected to the edge of the engaging body.

7. The adjustable tie rod for a semitrailer according to claim 1, characterized in that: The connecting portion includes a connecting head and a pull ring arranged at one end of the connecting head. The other end of the connecting head is fixedly connected to the engaging body. A blind hole is arranged inside the engaging body, and an inner side surface of the blind hole is provided with an internal thread.

8. The adjustable tie rod for a semitrailer according to claim 7, characterized in that: The pull rod portion includes a rod body, and both ends of the rod body are provided with external threads adapted to the internal threads.

9. The adjustable tie rod for a semitrailer according to claim 8, characterized in that: A plane is provided in the middle of the rod body.

10. The adjustable tie rod for a semi-trailer according to claim 1, characterized in that: The wing plate is provided with a groove adapted to the U-bolt.

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