Self-adjusting tensioner for transmission chain of all-terrain robot

Abstract

The utility model relates to a self-adjusting tensioner for a transmission chain of an all-terrain robot, the self-adjusting tensioner is movably arranged on a frame on one side and supports the lower half section of the chain, the tensioner comprises a supporting base and a wear-resistant supporting block, and the supporting base comprises a rotating shaft, a baffle, a first torsion spring and a second torsion spring. The two ends of the rotating shaft are movably arranged on the two side walls of the frame, the rotating shaft is provided with a wear-resisting supporting block, and the top of the wear-resisting supporting block is of a cambered surface structure and abuts against the bottom of the chain. The first torsion spring is arranged on the frame and upwards supports one end of the rotating shaft, so that one end of the supporting base is supported by the first torsion spring; and the second torsion spring is arranged at the other end of the rotating shaft and upwards supports the clamping strip at one end of the baffle, so that the other end of the supporting base is supported by the second torsion spring, and the stability of the supporting base is guaranteed.

Description

Technical Field

[0001] The utility model relates to a chain tensioner, in particular to a self-adjusting tensioner for a transmission chain of an all-terrain robot. Background Art

[0002] An all-terrain wheeled robot refers to a robot that can travel on any terrain and move freely on terrains where ordinary vehicles have difficulty maneuvering. All-terrain robots have various uses and are not restricted by road conditions. Currently, in the transmission system of all-terrain robots, the transmission between each wheel axle mainly relies on a sprocket chain. Under the influence of load and movement during long-term use, due to the wear of the pins and rollers of the chain or the plastic deformation of the metal material, the chain elongates, resulting in a slack phenomenon, and ultimately affecting the transmission force between each wheel axle. The transmission chain is in a tightness state. Chinese patent document: CN201610091136.7, discloses a tensioning device rod. The inside of the rod body in this application is a hollow structure and a torsion spring is sleeved through a boss portion to support the chain by the rod body. This causes the rod body structure in this application to be thin and the contact surface with the chain is prone to wear and needs to be frequently replaced. Summary of the Utility Model

[0003] Aiming at the above problems, the utility model discloses a self-adjusting tensioner for a transmission chain of an all-terrain robot, which uses a wear-resistant solid support block to support the chain and avoids the problem that the support block is prone to wear and needs to be frequently replaced.

[0004] The specific technical solutions are as follows:

[0005] A self-adjusting tensioner for a transmission chain of an all-terrain robot is movably arranged on one side of the vehicle frame and supports the lower half of the chain. The tensioner includes a support base and a wear-resistant support block. The support base includes a rotating shaft, a baffle, a first torsion spring, and a second torsion spring. The two ends of the rotating shaft are longitudinally movably arranged on the two side walls of the vehicle frame. The wear-resistant support block is arranged on the rotating shaft. The top of the wear-resistant support block is an arc surface structure and abuts against the bottom of the chain. A baffle is fixedly arranged on each side of the rotating shaft where the wear-resistant support block is located. One end of the baffle is connected to the rotating shaft, and a clamping bar protrudes outward from the other end of one of the baffles; the first torsion spring is arranged on the vehicle frame and upwardly supports one end of the rotating shaft, so as to realize the upward support of the first torsion spring on one end of the support base; the second torsion spring is arranged on the other end of the rotating shaft and upwardly supports the clamping bar at one end of the baffle, so as to realize the upward support of the second torsion spring on the other end of the support base.

[0006] Furthermore, sliding grooves for accommodating the rotating shaft are symmetrically arranged on the two side walls of the vehicle frame, and the width dimension of the sliding grooves is adapted to the diameter of the rotating shaft.

[0007] Further, a groove adapted to the rotating shaft is provided at the center of the bottom of the wear-resistant support block, so that the wear-resistant support block is sleeved on the rotating shaft through the groove.

[0008] Further, the front and rear ends of the wear-resistant support block are arranged in an arc shape, and the two sides of the wear-resistant support block are arranged in a plane and there is a gap between each side and the two baffles respectively.

[0009] Further, the first torsion spring is sleeved on the convex shaft on the vehicle frame. One end of the first torsion spring is positioned by the vehicle frame, and the other end of the first torsion spring is bent and abuts upward against one end of the rotating shaft.

[0010] Further, the second torsion spring is sleeved on the rotating shaft. One end of the second torsion spring is positioned by the vehicle frame, and the other end of the second torsion spring abuts upward against the clamping strip.

[0011] Further, one ends of the baffles are fixedly connected to the rotating shaft respectively. The other ends of the baffles extend along the direction of the chain and are provided with the clamping strips, and the upper ends of the baffles are higher than the top of the wear-resistant support block.

[0012] Further, the wear-resistant support block is made of polytetrafluoroethylene.

[0013] The beneficial effects of the present utility model are embodied in:

[0014] (1) The present utility model uses a support base and a support block to support the chain. The support block is made of polytetrafluoroethylene with high lubricity and high wear resistance, which reduces the resistance to the chain and effectively ensures the service life of the tensioner.

[0015] (2) Both sides of the support base are supported by torsion springs, so that the support block can be fully abutted against the chain. And when the chain becomes slack, under the pre-tightening force of the torsion springs, the chain tension can still be maintained, realizing the self-adjusting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural view of the present utility model.

[0017] Figure 2 is a perspective view of the present utility model.

[0018] Figure 3 is a side view of the present utility model.

[0019] Figure 4 is a schematic structural view of the tensioner of the present utility model installed on the frame.

[0020] Figure 5 is a top view of the present utility model.

[0021] Figure 6This is the bottom view of the present utility model.

[0022] Figure 7 This is the structural schematic diagram of the wear-resistant support block of the present utility model.

[0023] Explanation of reference numerals in the drawings: chain 1, vehicle frame 2, convex shaft 21, chute 22, support base 3, rotating shaft 31, baffle 32, clamping strip 321, first torsion spring 33, second torsion spring 34, wear-resistant support block 4, groove 41. Detailed implementation manners

[0024] To make the technical solution of the present utility model clearer and more definite, the present utility model will be further described below with reference to the drawings. Any solution obtained by equivalent replacement of the technical features of the technical solution of the present utility model and through conventional reasoning falls within the protection scope of the present utility model. The fixed connection and fixed setting mentioned in the present utility model are all common connection methods in the mechanical field, and welding, bolt and nut connection, and screw connection are all applicable.

[0025] In the description of the present creation of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present creation of the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] Please refer to Figures 1-6The present embodiment provides a self-adjusting tensioner for the transmission chain of an all-terrain robot, which is movably arranged on one side of the frame and supports the lower half of the chain. The tensioner includes a support base 3 and a wear-resistant support block 4. The support base 3 includes a rotating shaft 31, a baffle 32, a first torsion spring 33, and a second torsion spring 34. Both ends of the rotating shaft 31 are longitudinally movably arranged on the two side walls of the frame. The two side walls of the frame 2 are symmetrically provided with slide grooves 22 for accommodating the rotating shaft 31. The width of the slide groove 22 is adapted to the diameter of the rotating shaft 31, so that the support base 3 can be raised and lowered under the guidance of the slide groove 22. A wear-resistant support block 4 is arranged on the rotating shaft 31. In this embodiment, the material of the wear-resistant support block 4 is polytetrafluoroethylene with high lubricity and high wear resistance. A groove 41 matching the rotating shaft 31 is arranged at the center of the bottom of the wear-resistant support block 4, so that the wear-resistant support block 4 is mounted on the rotating shaft 31 through the groove 41; the top of the wear-resistant support block 4 is an arc surface structure and abuts against the bottom of the chain 1. A baffle 32 is arranged at both ends of the rotating shaft 31. The two baffles 32 are respectively located on both sides of the wear-resistant support block 4. The rear ends of the baffles 32 are fixedly connected to the rotating shaft 31. The front ends of the baffles 32 extend along the chain direction, and the upper ends of the baffles 32 are higher than the top of the wear-resistant support block 4, and the chain is limited to prevent the chain from detaching from the top of the wear-resistant support block 4; a clamping strip 321 is protruded outwardly on the outer wall of the front end of one of the baffles 32. The first torsion spring 33 is arranged on the frame 2 and supports one end of the rotating shaft 31 upward, so that the first torsion spring 33 supports one end of the support base 3. The second torsion spring 34 is arranged on the other end of the rotating shaft 31 and supports the clamping strip 321 at one end of the baffle 32 upward, so that the second torsion spring 34 supports the other end of the support base 3. The two torsion springs respectively support the front and rear ends of the support base 3 to ensure the stability of the support base 3 and make the top of the wear-resistant support block 4 fully fit with the bottom of the chain 1.

[0027] In this embodiment, both front and rear ends of the wear-resistant support block 4 are arranged in arcuate surfaces, and both sides of the wear-resistant support block 4 are arranged in planes and have a spacing between them and the two baffles 32 .

[0028] In this embodiment, the first torsion spring 33 is sleeved on the convex shaft 21 on the frame 2, one end of the first torsion spring 33 is positioned by the frame 2, and the other end of the first torsion spring 33 is bent and upwardly abuts against one end of the rotating shaft 31. The second torsion spring 34 is sleeved on the rotating shaft 31, one end of the second torsion spring 34 is positioned by the frame 2, and the other end of the second torsion spring 34 upwardly abuts against the clamping strip 321.

[0029] In the present utility model, the wear-resistant support block 4 is made of polytetrafluoroethylene material with high lubricity and high wear resistance, which effectively reduces the frictional resistance to the chain and also improves the service life of the support block. The support base 3 is supported by the first torsion spring 33 and the second torsion spring 34 to ensure that the wear-resistant support block 4 can be fully abutted against the chain. Even after the chain becomes loose, under the pre-tightening force of the torsion spring, the support base 3 and the wear-resistant support block 4 rise and fit the chain, so as to maintain the chain tension.

[0030] As mentioned above, the above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. An automatic tensioner for the drive chain of an all-terrain robot, which is movably arranged on one side of the vehicle frame and supports the lower half of the chain, characterized in that, The tensioner includes a support base (3) and wear-resistant support blocks (4). The support base (3) includes a rotating shaft (31), baffles (32), a first torsion spring (33), and a second torsion spring (34). Both ends of the rotating shaft (31) are longitudinally movably arranged on the two side walls of the vehicle frame. The wear-resistant support blocks (4) are arranged on the rotating shaft (31). The top of the wear-resistant support block is an arc surface structure and abuts against the bottom of the chain (1). On both sides of the wear-resistant support block (4) on the rotating shaft (31), a baffle (32) is fixedly arranged respectively. One end of the baffle (32) is connected to the rotating shaft. On the other end of one of the baffles (32), a clamping strip (321) protrudes outwards; the first torsion spring (33) is arranged on the vehicle frame and upwardly supports one end of the rotating shaft (31), so that the first torsion spring (33) supports one end of the support base; the second torsion spring (34) is arranged on the other end of the rotating shaft (31) and upwardly supports the clamping strip (321) at one end of the baffle, so that the second torsion spring (34) supports the other end of the support base.

2. The self-adjusting tensioner for the drive chain of an all-terrain robot according to claim 1, characterized in that, Chute grooves (22) for accommodating the rotating shaft (31) are symmetrically arranged on the two side walls of the vehicle frame. The width dimension of the chute groove (22) is adapted to the diameter of the rotating shaft (31).

3. An automatic tensioner for a drive chain of an all-terrain robot according to claim 1, characterized in that, A groove (41) adapted to the rotating shaft (31) is provided at the center of the bottom of the wear-resistant support block (4), so that the wear-resistant support block (4) is sleeved on the rotating shaft (31) through the groove (41).

4. An automatic tensioner for a drive chain of an all-terrain robot according to claim 3, characterized in that, The front and rear ends of the wear-resistant support block (4) are arranged in an arc shape. The two sides of the wear-resistant support block (4) are arranged in a plane and there is a gap between the two sides and the two baffles (32) respectively.

5. An automatic tensioner for a drive chain of an all-terrain robot according to claim 1, characterized in that, The first torsion spring (33) is sleeved on a convex shaft (21) on the vehicle frame (2). One end of the first torsion spring (33) is positioned by the vehicle frame (2). The other end of the first torsion spring (33) is bent and abuts upwardly against one end of the rotating shaft (31).

6. The self-adjusting tensioner for the drive chain of an all-terrain robot according to claim 1, wherein, The second torsion spring (34) is sleeved on the rotating shaft (31). One end of the second torsion spring (34) is positioned by the vehicle frame (2). The other end of the second torsion spring (34) abuts upwardly against the clamping strip (321).

7. The self - adjusting tensioner for the drive chain of an all - terrain robot according to claim 1, wherein, One end of each of the baffles (32) is fixedly connected to the rotating shaft (31). The other end of the baffle (32) extends along the direction of the chain and the clamping strip (321) is arranged, and the upper end of the baffle (32) is higher than the top of the wear-resistant support block (4).

Images