Tractor spring telescopic upper pull rod

Abstract

The utility model discloses a tractor spring telescopic upper pull rod which comprises a sleeve, a first pull rod is arranged at one end of the sleeve, and a first connector is arranged at the end, away from the sleeve, of the first pull rod. A second pull rod is arranged at the other end of the sleeve, and a second connector is arranged at the end, away from the sleeve, of the second pull rod; the first pull rod and the second pull rod are connected with the sleeve in a threaded connection mode, a handle is arranged at the position, close to the second pull rod, of the sleeve, and a pressure-adjustable spring is arranged in the middle of the sleeve. According to the utility model, the length of the spring telescopic upper pull rod of the tractor can be quickly and conveniently adjusted. Besides, the spring can be tightly pressed or released by the first jacking support by rotating a rotary handle outside the pressure adjusting nut, so that the pressure of the spring can be conveniently adjusted, and the spring telescopic upper pull rod of the tractor can meet the damping requirements of different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor suspension structures, in particular to a tractor spring telescopic upper pull rod. Background Art

[0002] Tractors are usually used as a power source to carry some additional tools to complete various agricultural tasks during the farming process. For example, a seeder, a fertilizer spreader, etc. are fixed by multiple pull rods. The existing connecting rods are mostly composed of two connecting rods with external bolts and a sleeve threadedly connected to the two connecting rods, and hangers are installed at both ends of the connecting rod. When the current suspension pull rod is in use, the distance between the two pull rods is usually adjusted by rotating the middle sleeve to achieve adjustable distance. However, this adjustment method is very inconvenient during operation, and in order to ensure the shock absorption performance of the tractor suspension system, a spring is generally set on the pull rod, but the pressure of the spring structure of the existing pull rod is also unable to be adjusted. Therefore, a tractor spring telescopic upper pull rod that can conveniently adjust the pull rod length and spring pressure is developed. Utility Model Content

[0003] The utility model aims to provide a tractor spring telescopic upper pull rod to solve the technical problems mentioned in the above background technology.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a spring telescopic upper pull rod for a tractor, comprising a sleeve, wherein a first pull rod is arranged at one end of the sleeve, and a first connector is arranged at an end of the first pull rod away from the sleeve; a second pull rod is arranged at the other end of the sleeve, and a second connector is arranged at an end of the second pull rod away from the sleeve; the first pull rod and the second pull rod are both connected to the sleeve by threaded connection, and a handle is arranged at a position of the sleeve close to the second pull rod, and a pressure-adjustable spring is arranged in the middle of the sleeve.

[0006] Furthermore, the first pull rod and the second pull rod are respectively provided with locking nuts threadedly connected thereto at positions close to the ends of the sleeve.

[0007] Furthermore, the internal threads of the sleeve and each of the locking nuts, and the external threads of the first pull rod and the second pull rod are all configured as trapezoidal threads.

[0008] Furthermore, the first connecting head and the second connecting head include fixed joints respectively fixedly connected to one end of the first pull rod or the second pull rod away from the sleeve, and a joint bearing is arranged in the middle of each of the fixed joints.

[0009] Furthermore, the first connecting head and the second connecting head include movable joints hingedly connected to the first pull rod or the second pull rod respectively, and each of the movable joints is provided with a connecting hole.

[0010] Furthermore, the first connecting head includes a fixed joint fixedly connected to an end of the first pull rod away from the sleeve, and a joint bearing is arranged in the middle of the fixed joint; the second connecting head includes a movable joint hingedly connected to the second pull rod, and a connecting hole is opened on the movable joint.

[0011] Furthermore, the spring is sleeved on the outside of the sleeve, and a first support is provided on the outside of the sleeve near one end of the spring, a pressure-adjusting nut is provided on the end of the first support facing away from the spring, the pressure-adjusting nut is threadedly connected to an external thread opened on the outer wall of the sleeve, and two rotary handles are symmetrically fixed on the outer wall of the pressure-adjusting nut; the sleeve is provided with an elongated limiting hole at a position near the other end of the spring, and is sleeved with a second support in contact with the other end of the spring, a connecting sleeve is provided on the end of the second support facing away from the spring, two limiting heads slidably matched with the limiting holes are symmetrically provided on the end of the first pull rod, a guide rod slidably matched with the limiting hole is fixedly provided on the connecting sleeve and the first pull rod, and a locking pin is provided on the end of the guide rod.

[0012] Further, the sleeve includes an adjusting sleeve, and a first mounting sleeve and a second mounting sleeve are respectively provided at both ends of the adjusting sleeve, the first pull rod is threadedly connected to one end of the first mounting sleeve, the second pull rod is threadedly connected to one end of the second mounting sleeve, the other end of the first mounting sleeve is fixedly connected to one end of the adjusting sleeve, the other end of the adjusting sleeve is fixedly provided with a pressure-adjusting locking nut, the outside of the other end of the second mounting sleeve is provided with an external thread matched with the pressure-adjusting locking nut and is threadedly connected to the pressure-adjusting locking nut, the handle is fixedly provided on the outside of the adjusting sleeve, and the spring is provided on the inside of the adjusting sleeve.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] The utility model can rotate the locking nut corresponding to the second pull rod and then rotate the handle mechanism to rotate the sleeve relative to the second pull rod, thereby adjusting the spacing between the first connector and the second connector, that is, quickly and conveniently adjusting the length of the tractor spring telescopic upper pull rod. In addition, the utility model can also rotate the rotary handle outside the pressure-adjusting nut to make the first top support press or release the spring, thereby conveniently adjusting the spring pressure, so that the tractor spring telescopic upper pull rod can adapt to the shock absorption requirements of different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0019] Figure 4 for Figure 2 A top view of

[0020] Figure 5 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0021] Figure 6 for Figure 5 A top view of

[0022] Figure 7 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0023] Figure 8 Bit Figure 7 A top view of

[0024] Fig. 9 This is a schematic diagram of the structure of Embodiment 5 of the present utility model;

[0025] Fig.10 for Fig. 9 A top view of

[0026] Fig.11 This is a schematic diagram of the structure of the sixth embodiment of the utility model;

[0027] Fig.12 for Fig.11 A top view of

[0028] Explanation of the accompanying drawings: 1. sleeve; 1-1. adjusting sleeve; 1-2. first mounting sleeve; 1-3. second mounting sleeve; 2. first pull rod; 3-1. fixed joint; 3-2. joint bearing; 4. second pull rod; 5-1. movable joint; 5-2. connecting hole; 6. handle; 7. spring; 8. locking nut; 9. first jacking support; 10. pressure-adjusting nut; 11. rotary handle; 12. limiting long hole; 13. second jacking support; 14. connecting sleeve; 15. limiting head; 16. guide rod; 17. locking pin; 18. pressure-adjusting locking nut. DETAILED DESCRIPTION

[0029] Embodiment 1: Figure 1-Figure 2 As shown, a tractor spring telescopic upper pull rod comprises a sleeve 1, a first pull rod 2 is installed at one end of the sleeve 1, and a first connector is installed at the end of the first pull rod 2 away from the sleeve. A second pull rod 4 is arranged at the other end of the sleeve 1, and a second connector is arranged at the end of the second pull rod 4 away from the sleeve 1. The first pull rod 2 and the second pull rod 4 are both connected to the sleeve 1 by threaded connection, and the sleeve 1 is provided with a handle 6 at a position close to the second pull rod, and a pressure-adjustable spring 7 is installed in the middle of the sleeve 1.

[0030] The first tie rod 2 and the second tie rod 4 are respectively installed with locking nuts 8 threadedly connected thereto at the positions near the ends of the sleeve 1. The internal threads of the sleeve 1 and the locking nuts 8, and the external threads of the first tie rod 2 and the second tie rod 4 are all set as trapezoidal threads to ensure the firmness and durability of the threaded connection structure. Moreover, the cross-section of the outer edge structure of the sleeve near the end of the second tie rod is hexagonal, making the sleeve firm and durable and not easy to deform.

[0031] In this embodiment, the spring 7 is sleeved on the outside of the sleeve 1, and a first support 9 is sleeved and installed on the outside of the sleeve 1 near one end of the spring 7. A pressure-adjusting nut 10 is fixedly arranged on the end of the first support 9 away from the spring 7. The pressure-adjusting nut 10 is threadedly connected with the external thread opened on the outer wall of the sleeve, and two rotary handles 11 are symmetrically fixedly arranged on the outer wall of the pressure-adjusting nut 10. The sleeve 1 is provided with a long strip-shaped limiting long hole 12 at the part near the other end of the spring 7, and is sleeved with a second support 13 in contact with the other end of the spring 7, and a connecting sleeve 14 is arranged on the end of the second support 13 away from the spring. Two limiting heads 15 that are slidably matched with the limiting long hole 12 are symmetrically arranged at the end of the first pull rod 2, and a guide rod 16 that is slidably matched with the limiting long hole 12 is fixedly arranged on the connecting sleeve 14 and the first pull rod 2, and a locking pin 17 is arranged at the end of the guide rod 16.

[0032] The first connector 3 and the second connector 5 include a fixed joint 3-1 fixedly connected to one end of the first pull rod 2 or the second pull rod 4 away from the sleeve 1, and a spherical bearing 3-2 is installed in the middle of each fixed joint 3-1.

[0033] The utility model can rotate the locking nut corresponding to the second pull rod and then rotate the handle mechanism to rotate the sleeve relative to the second pull rod, thereby adjusting the spacing between the first connector and the second connector, that is, quickly and conveniently adjusting the length of the tractor spring telescopic upper pull rod. In addition, the utility model can also rotate the rotary handle outside the pressure-adjusting nut to make the first top support press or release the spring, thereby conveniently adjusting the spring pressure, so that the tractor spring telescopic upper pull rod can adapt to the shock absorption requirements of different working conditions.

[0034] Embodiment 2: Figure 3 and Figure 4 As shown, this embodiment adjusts the structures of the first connecting head and the second connecting head without changing other structures of the first embodiment. The first connecting head and the second connecting head include movable joints 5-1 hingedly connected to the first pull rod 2 or the second pull rod 4 respectively, and each of the movable joints 5-1 is provided with a connecting hole 5-2.

[0035] Embodiment 3: Figure 5 and Figure 6 As shown, this embodiment adjusts the structures of the first connector and the second connector without changing other structures of the first embodiment, and the first connector includes a fixed joint 3-1 fixedly connected to the end of the first pull rod 2 away from the sleeve 1, and a joint bearing 3-2 is provided in the middle of the fixed joint 3-1. The second connector includes a movable joint 5-1 hingedly connected to the second pull rod 4, and a connecting hole 5-2 is provided on the movable joint 5-1.

[0036] Embodiment 4, as Figure 7 and Figure 8As shown, this embodiment adjusts the structure of the sleeve 1 without changing other structures of the first embodiment. Specifically, the sleeve includes an adjusting sleeve 1-1, and the first mounting sleeve 1-2 and the second mounting sleeve 1-3 are respectively provided at both ends of the adjusting sleeve 1-1. The first pull rod 2 is threadedly connected to one end of the first mounting sleeve 1-2, and the second pull rod 4 is threadedly connected to one end of the second mounting sleeve 1-3. The other end of the first mounting sleeve 1-2 is fixedly connected to one end of the adjusting sleeve 1-1, and the other end of the adjusting sleeve 1-1 is fixedly provided with a pressure-adjusting locking nut 18, and the other end of the second mounting sleeve 1-3 is provided with an external thread matched with the pressure-adjusting locking nut 18 and is threadedly connected to the pressure-adjusting locking nut 18, the handle 6 is fixedly provided on the outside of the adjusting sleeve 1-1, and the spring 7 is installed inside the adjusting sleeve 1-1. The structure of the spring 7 in this embodiment can be specifically set as a structural combination of a large spring outer sleeve and a small spring, so as to realize a bidirectional buffering function. In this embodiment, the adjusting sleeve can be moved relative to the second mounting sleeve directly by rotating the handle, thereby achieving synchronous adjustment of the length of the entire suspension upper pull rod and the spring pressure.

[0037] Embodiment 5: Fig. 9 and Fig.10 As shown, in this embodiment, without changing other structures of the fourth embodiment, the structures of the first connecting head and the second connecting head are adjusted. The first connecting head and the second connecting head include movable joints 5-1 hingedly connected to the first pull rod 2 or the second pull rod 4 respectively, and each of the movable joints 5-1 is provided with a connecting hole 5-2.

[0038] Example 6: Fig.11 and Fig.12 As shown, this embodiment adjusts the structures of the first connector and the second connector without changing other structures of the first embodiment, and the first connector includes a fixed joint 3-1 fixedly connected to the end of the first pull rod 2 away from the sleeve 1, and a joint bearing 3-2 is provided in the middle of the fixed joint 3-1. The second connector includes a movable joint 5-1 hingedly connected to the second pull rod 4, and a connecting hole 5-2 is provided on the movable joint 5-1.

[0039] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A tractor spring telescopic upper pull rod, Features: It includes a sleeve, a first pull rod is provided at one end of the sleeve, and a first connector is provided at the end of the first pull rod away from the sleeve; a second pull rod is provided at the other end of the sleeve, and a second connector is provided at the end of the second pull rod away from the sleeve; the first pull rod and the second pull rod are both connected to the sleeve by threaded connection, and the sleeve is provided with a handle at a position close to the second pull rod, and a pressure-adjustable spring is provided in the middle of the sleeve.

2. The tractor spring telescopic upper pull rod according to claim 1, Features: The first pull rod and the second pull rod are respectively provided with locking nuts threadedly connected thereto at positions close to the ends of the sleeves.

3. The tractor spring telescopic upper pull rod according to claim 2, Features: The internal threads of the sleeve and each of the locking nuts, and the external threads of the first pull rod and the second pull rod are all arranged as trapezoidal threads.

4. The tractor spring telescopic upper pull rod according to claim 1, Features: The first connecting head and the second connecting head include a fixed joint which is respectively fixedly connected to one end of the first pull rod or the second pull rod away from the sleeve, and a joint bearing is arranged in the middle of each of the fixed joints.

5. The tractor spring telescopic upper pull rod according to claim 1, Features: The first connecting head and the second connecting head include movable joints hingedly connected to the first pull rod or the second pull rod respectively, and each of the movable joints is provided with a connecting hole.

6. The tractor spring telescopic upper pull rod according to claim 1, Features: The first connecting head includes a fixed joint fixedly connected to the end of the first pull rod away from the sleeve, and a joint bearing is arranged in the middle of the fixed joint; the second connecting head includes a movable joint hingedly connected to the second pull rod, and a connecting hole is opened on the movable joint.

7. The tractor spring telescopic upper pull rod according to claim 1, Features: The spring is sleeved on the outside of the sleeve, and a first support is provided on the outside of the sleeve near one end of the spring, a pressure-adjusting nut is provided on the end of the first support facing away from the spring, the pressure-adjusting nut is threadedly connected to an external thread opened on the outer wall of the sleeve, and two rotary handles are symmetrically fixed on the outer wall of the pressure-adjusting nut; a long strip-shaped limiting hole is opened on the sleeve near the other end of the spring, and a second support in contact with the other end of the spring is sleeved, and a connecting sleeve is provided on the end of the second support facing away from the spring, two limiting heads slidably matched with the limiting hole are symmetrically provided on the end of the first pull rod, a guide rod slidably matched with the limiting hole is fixedly provided on the connecting sleeve and the first pull rod, and a locking pin is provided on the end of the guide rod.

8. The tractor spring telescopic upper pull rod according to claim 1, Features: The sleeve includes an adjusting sleeve, and a first mounting sleeve and a second mounting sleeve are respectively provided at both ends of the adjusting sleeve, the first pull rod is threadedly connected to one end of the first mounting sleeve, the second pull rod is threadedly connected to one end of the second mounting sleeve, the other end of the first mounting sleeve is fixedly connected to one end of the adjusting sleeve, and a pressure-adjusting locking nut is fixedly provided at the other end of the adjusting sleeve, and an external thread matching the pressure-adjusting locking nut is provided on the outside of the other end of the second mounting sleeve and is threadedly connected to the pressure-adjusting locking nut, the handle is fixedly provided on the outside of the adjusting sleeve, and the spring is provided on the inside of the adjusting sleeve.

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