Tractor tension wheel adjusting convenient mechanism

Abstract

The utility model provides a tractor tension pulley adjusting convenient mechanism relates to tractor transmission subassembly technical field, including tension pulley, the side surface swing joint of tension pulley has the adjusting support, the bottom end of adjusting support is rotatively connected with fixed support. The utility model rotates knob drive transmission screw rotation, because transmission screw is connected with thread slide plate thread, and thread slide plate is limited by sliding guide rod and cannot rotate, so transmission screw's rotation will convert into thread slide plate along the up and down linear movement of sliding guide rod, further through the support side plate drive buffer assembly and tension pulley synchronous movement, realize the tension degree adjustment, compared with the existing bolt adjustment structure, need not help external tool, only through the manual rotation knob can complete the adjustment, convenient operation, the limiting effect of sliding guide rod ensures that thread slide plate moves stably, avoids the deviation when adjusting, improves the tension degree adjustment precision greatly, solved the existing mechanism adjustment complicated, low precision problem.

Description

Technical Field

[0001] This utility model relates to the field of tractor transmission components technology, and in particular to a convenient mechanism for adjusting the tension wheel of a tractor. Background Technology

[0002] The tractor tensioner is a key component in the tractor transmission system. It is mainly used to adjust the tension of the drive belt or chain to ensure that the belt or chain always maintains the appropriate tension during the operation of the transmission system. This avoids slippage and reduced transmission efficiency caused by the belt or chain being too loose, or abnormal wear and noise caused by the belt or chain being too loose, thus ensuring that all working devices of the tractor can operate stably and efficiently. The tensioner adjustment mechanism is used to adjust the position of the tensioner, thereby changing the tension of the belt or chain. During long-term use of a tractor, the drive belt or chain will gradually lengthen due to wear, stretching, and other factors, resulting in a decrease in tension. At this time, the tensioner adjustment mechanism is needed to move the tensioner to restore the normal tension of the belt or chain and ensure the normal operation of the transmission system.

[0003] The existing technology has the following shortcomings: Existing tensioner adjustment mechanisms mostly use direct bolt tightening or lever adjustment structures. Adjustment requires repeated tightening of bolts with tools such as wrenches, and a smooth movement of the tensioner cannot be achieved through a single operation. This easily leads to over- or under-adjustment, resulting in low tension control accuracy. Furthermore, the operation is cumbersome, consuming manpower and time. Existing devices lack an adjustable spring buffer structure. On the one hand, the buffer force cannot be adjusted according to the drive belt specifications. Insufficient buffer force when the belt is thick can easily cause impact damage to components, while excessive buffer force when the belt is thin can easily cause the belt to become overly tight. On the other hand, vibrations from tractor operation are directly transmitted to the tensioner, causing frequent tension fluctuations between the tensioner and the belt, accelerating wear on the belt, chain, and tensioner, and shortening their service life. The installation angle of existing adjustment mechanisms is fixed, making it impossible to adjust the tensioner's setting direction according to the installation space of the tractor's transmission system. When different transmission positions need to be adapted, different adjustment mechanisms with different structures must be replaced, resulting in poor versatility and increased operating costs. Utility Model Content

[0004] This utility model proposes a convenient adjustment mechanism for the tensioner wheel of a tractor, which has the advantages of convenient and high precision manual adjustment, buffer elasticity that can be adapted to different transmission components, and flexible and adjustable installation angle, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a convenient adjustment mechanism for a tractor tensioner pulley, comprising a tensioner pulley, wherein an adjustment bracket is movably connected to the side of the tensioner pulley, and a fixed bracket is rotatably connected to the bottom end of the adjustment bracket.

[0006] The adjusting bracket includes a square frame. A threaded slide plate is slidably connected to the inner side of the square frame. A transmission screw that runs vertically through the middle of the threaded slide plate is threadedly connected to the middle. The top end of the transmission screw extends through to the top of the square frame and is fixedly connected to a knob. Sliding guide rods that run vertically through the middle are slidably connected to the front and rear sides of the threaded slide plate. The two sliding guide rods are respectively fixedly connected to the front and rear sides of the inner surface of the square frame. Support side plates are fixedly connected to the front and rear ends of the threaded slide plate. A connecting groove that runs vertically through the front and rear is opened on the top of the support side plate. A buffer assembly is provided inside the connecting groove. The tension pulley is rotatably connected to the opposite surfaces of the two buffer assemblies.

[0007] Preferably, the buffer assembly includes a connecting slide plate, which is slidably connected to the inner surface of the connecting groove. A bearing that runs through the front and rear is fixedly connected to the middle of the connecting slide plate, and the inner rings of the two bearings are respectively fixedly connected to the front and rear ends of the tension pulley.

[0008] Preferably, the left and right sides of the connecting slide plate are slidably connected with vertically penetrating support slides, and the upper and lower ends of the support slides are fixedly connected with threaded columns.

[0009] Preferably, the end of the threaded post away from the supporting slide post is fixedly connected to the inner wall of the connecting slide groove, and a rotating nut is threadedly connected to the outer surface of the threaded post.

[0010] Preferably, a buffer spring is fixedly connected to the side of the rotating nut near the connecting slide plate, and the buffer spring is sleeved on the outer surface of the supporting slide column, with the end away from the rotating nut being fixedly connected to the outer surface of the connecting slide plate.

[0011] Preferably, a rotating block is fixedly connected to the bottom of the square frame, and three positioning slots are arranged in a circular array on the outer surface of the rotating block.

[0012] Preferably, the fixed bracket includes a support plate, and a mounting plate is fixedly connected to the rear end of the support plate.

[0013] Preferably, a connecting groove is provided at the center of the front end of the support plate, and the rotating block is rotatably connected to the inner side of the connecting groove.

[0014] Preferably, the support plate has a sliding groove that runs vertically through the middle, and a transverse T-shaped clamping plate is slidably connected to the inner surface of the sliding groove. The front end of the transverse T-shaped clamping plate extends through to the inner side of the connecting groove and is slidably engaged with the inner side of the positioning groove.

[0015] Preferably, sliding pull plates are fixedly connected to both the upper and lower sides of the transverse T-shaped plate, and a tightening spring is fixedly connected to the rear side of the transverse T-shaped plate. The rear end of the tightening spring is fixedly connected to the rear side of the inner wall of the sliding groove.

[0016] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. In this utility model, by adjusting the square frame of the bracket, the threaded slide plate, the transmission screw, the knob, and the sliding guide rod, the rotation of the knob drives the transmission screw to rotate. Since the transmission screw is threadedly connected to the threaded slide plate, and the threaded slide plate is limited by the sliding guide rod and cannot rotate, the rotation of the transmission screw is converted into the threaded slide plate moving linearly up and down along the sliding guide rod. This, in turn, drives the buffer assembly and the tensioning pulley to move synchronously through the support side plate, thereby achieving tension adjustment. Compared with the existing bolt adjustment structure, no external tools are needed; adjustment can be completed simply by manually rotating the knob, making operation convenient. At the same time, the limiting effect of the sliding guide rod ensures that the threaded slide plate moves smoothly, avoiding deviation during adjustment, greatly improving the tension adjustment accuracy, and solving the problems of cumbersome adjustment and low accuracy of existing mechanisms.

[0017] 2. In this utility model, by adjusting the rotating block, connecting groove, transverse T-shaped plate, positioning groove, and tightening spring that cooperate with the fixed bracket, as well as the connecting slide plate, supporting slide column, threaded column, rotating nut, and buffer spring of the buffer assembly, on the one hand, pulling the sliding plate causes the transverse T-shaped plate to move backward and the tightening spring to compress, allowing the rotating block to rotate to the target angle within the connecting groove. After releasing the sliding plate, the tightening spring pushes the plate into the positioning groove to lock the angle, thus achieving flexible adjustment of the installation angle. On the other hand, the rotating nut can change the compression of the buffer spring by moving along the threaded column. When the tractor vibrates during operation, the buffer spring extends and retracts, causing the connecting slide plate to slide along the supporting slide column, achieving a small adaptive movement of the tension pulley. Based on this principle, the installation angle can be flexibly adjusted to adapt to different transmission positions of the tractor. At the same time, the buffer force can be adjusted according to the belt specifications to avoid damage to components caused by unsuitable force. Moreover, the force transmitted to the tension pulley after the vibration is absorbed by the spring is weakened, reducing tension fluctuations and wear, extending the service life of components, and solving the problems of poor versatility, poor buffer adaptability, and easy wear caused by vibration in existing mechanisms. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the convenient adjustment mechanism for the tractor tensioner wheel of this utility model; Figure 2 This is a cross-sectional structural diagram of the adjustment bracket of this utility model; Figure 3 This is a schematic diagram of the structure of the buffer assembly of this utility model; Figure 4This is a schematic diagram of the structure of the fixed bracket of this utility model; Figure 5 This is a cross-sectional structural diagram of the fixed bracket of this utility model.

[0019] Legend: 1. Tensioning pulley; 2. Adjusting bracket; 21. Square frame; 22. Threaded slide plate; 23. Transmission screw; 24. Knob; 25. Sliding guide rod; 26. Support side plate; 27. Connecting slide groove; 28. Buffer assembly; 281. Connecting slide plate; 282. Bearing; 283. Support slide column; 284. Threaded column; 285. Rotating nut; 286. Buffer spring; 29. ​​Rotating block; 210. Positioning slot; 3. Fixed bracket; 31. Support plate; 32. Mounting plate; 33. Connecting groove; 34. Sliding groove; 35. Horizontal T-shaped clamping plate; 36. Sliding pull plate; 37. Tightening spring. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1: As Figure 1 , Figure 2 and Figure 3As shown, this utility model provides a technical solution: it includes a tension pulley 1, an adjusting bracket 2 movably connected to the side of the tension pulley 1, a fixed bracket 3 rotatably connected to the bottom of the adjusting bracket 2, the adjusting bracket 2 includes a square frame 21, a threaded slide plate 22 slidably connected to the inner side of the square frame 21, a transmission screw 23 threaded through the middle of the threaded slide plate 22, the top of the transmission screw 23 penetrating to the top of the square frame 21 and fixedly connected to a knob 24, sliding guide rods 25 slidably connected to the front and rear sides of the threaded slide plate 22, the two sliding guide rods 25 being fixedly connected to the front and rear sides of the inner surface of the square frame 21 respectively, support side plates 26 being fixedly connected to the front and rear ends of the threaded slide plate 22, a connecting groove 27 penetrating the front and rear of the top of the support side plate 26, a buffer assembly 28 being provided inside the connecting groove 27, and the tension pulley 1 being rotatably connected to the two buffers. On the opposite side of component 28, buffer component 28 includes a connecting slide plate 281, which is slidably connected to the inner surface of the connecting groove 27. A bearing 282 that runs through the front and rear is fixedly connected to the middle of the connecting slide plate 281. The inner rings of the two bearings 282 are fixedly connected to the front and rear ends of the tension pulley 1, respectively. Supporting slide columns 283 that run through the top and bottom are slidably connected to the left and right sides of the connecting slide plate 281. Threaded columns 284 are fixedly connected to the upper and lower ends of the supporting slide columns 283. The end of the threaded column 284 away from the supporting slide column 283 is fixedly connected to the inner wall of the connecting groove 27. A rotating nut 285 is threadedly connected to the outer surface of the threaded column 284. A buffer spring 286 is fixedly connected to the side of the rotating nut 285 near the connecting slide plate 281. The buffer spring 286 is sleeved on the outer surface of the supporting slide column 283 and the end away from the rotating nut 285 is fixedly connected to the outer surface of the connecting slide plate 281. The overall effect of Embodiment 1 is as follows: the transmission screw 23 is driven to rotate by the knob 24, and the threaded slide plate 22 slides up and down along the inner side of the square frame 21 under the limit of the sliding guide rod 25, which drives the support side plate 26 to move synchronously. The support side plate 26 drives the tension pulley 1 to move smoothly through the connecting slide plate 281 in the connecting groove 27 and the bearing 282 to achieve tension adjustment. The bearing 282 ensures that the tension pulley 1 rotates smoothly with the belt. The support slide column 283 provides sliding guidance for the connecting slide plate 281. The compression of the buffer spring 286 can be adjusted by rotating the nut 285 along the threaded column 284, which can adapt to different belt specifications and absorb vibration, reducing component wear.

[0023] Example 2: As Figure 2 , Figure 4 and Figure 5As shown, this utility model provides a technical solution: a rotating block 29 is fixedly connected to the bottom of a square frame 21. Three positioning slots 210 are arranged in a ring array on the outer surface of the rotating block 29. The fixed bracket 3 includes a support plate 31. An installation plate 32 is fixedly connected to the rear end of the support plate 31. A connecting groove 33 is opened in the middle of the front end of the support plate 31. The rotating block 29 is rotatably connected to the inner side of the connecting groove 33. A sliding groove 34 that runs vertically through the middle of the support plate 31 is opened. A transverse T-shaped plate 35 is slidably connected to the inner surface of the sliding groove 34. The front end of the transverse T-shaped plate 35 extends through to the inner side of the connecting groove 33 and is slidably engaged with the inner side of the positioning slot 210. Sliding pull plates 36 are fixedly connected to both the upper and lower sides of the transverse T-shaped plate 35. A tightening spring 37 is fixedly connected to the rear side of the transverse T-shaped plate 35. The rear end of the tightening spring 37 is fixedly connected to the rear side of the inner wall of the sliding groove 34. The overall effect of embodiment 2 is as follows: the mounting plate 32 fixes the support plate 31 on the tractor, the sliding pull plate 36 is pulled to move the transverse T-shaped clamping plate 35 backward along the sliding groove 34, the top spring 37 is compressed, the transverse T-shaped clamping plate 35 is disengaged from the positioning groove 210 of the rotating block 29, the rotating block 29 can rotate in the connecting groove 33 to adjust the angle of the square frame 21, after the sliding pull plate 36 is released, the top spring 37 pushes the clamping plate to reset and lock, adapting to different transmission positions.

[0024] The working principle of the entire device is as follows: First, the support plate 31 is fixed in the designated position of the tractor transmission system by the mounting plate 32 of the fixed bracket 3, completing the overall installation of the mechanism; according to the belt drive direction, the sliding plates 36 on both sides of the transverse T-shaped clamp 35 are pulled, so that the transverse T-shaped clamp 35 moves backward along the sliding groove 34 and compresses the top spring 37, and its front end disengages from the positioning slot 210 of the rotating block 29. At this time, the square frame 21 of the adjusting bracket 2 is rotated, and the rotating block 29 at the bottom of the square frame 21 rotates in the connecting groove 33 of the support plate 31. After the angle of the tension pulley 1 matches the belt direction, the sliding plate 36 is released, the top spring 37 is reset and pushes the front end of the transverse T-shaped clamp 35 into the corresponding positioning slot 210, locking the angle of the adjusting bracket 2; then the knob 24 on the top of the square frame 21 is rotated, and the knob 24 drives the transmission screw 23 to rotate. Because the transmission screw 23 is threadedly connected to the threaded slide plate 22, and the threaded slide plate 22 is subjected to front and rear... The sliding guide rods 25 on both sides are limited and cannot rotate. The threaded slide plate 22 slides up and down along the inner side of the square frame 21. The supporting side plates 26 at the front and rear ends move synchronously. The supporting side plates 26 drive the bearing 282 and the tension pulley 1 to approach the belt through the connecting slide plate 281 in the top connecting groove 27, until the tension pulley 1 contacts the belt and reaches the appropriate tension. Then, according to the belt thickness, the rotating nuts 285 at both ends of the supporting slide column 283 in the buffer assembly 28 are rotated. The rotating nuts 285 move along the threaded column 284 to change the compression of the buffer spring 286 and set the appropriate buffer force. When the tractor is working, the vibration causes the tension pulley 1 to move up and down slightly. The tension pulley 1 drives the connecting slide plate 281 to slide along the supporting slide column 283 through the bearing 282. The buffer spring 286 absorbs the vibration energy by extending and contracting, so that the tension pulley 1 adapts within the range of the connecting groove 27 and always maintains stable contact with the belt to ensure the normal operation of the transmission system.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A convenient adjustment mechanism for a tractor tensioner wheel, characterized in that: It includes a tension pulley (1), an adjusting bracket (2) is movably connected to the side of the tension pulley (1), and a fixed bracket (3) is rotatably connected to the bottom end of the adjusting bracket (2). The adjusting bracket (2) includes a square frame (21). A threaded slide plate (22) is slidably connected to the inner side of the square frame (21). A transmission screw (23) that runs vertically through the middle of the threaded slide plate (22) is threadedly connected to the middle. The top of the transmission screw (23) runs through the top of the square frame (21) and is fixedly connected to a knob (24). A sliding guide rod (25) that runs vertically through the middle is slidably connected to both the front and rear sides of the threaded slide plate (22). The two sliding guide rods (25) are fixedly connected to the front and rear sides of the inner surface of the square frame (21). Support side plates (26) are fixedly connected to both the front and rear ends of the threaded slide plate (22). A connecting groove (27) that runs vertically through the middle is opened on the top of the support side plate (26). A buffer assembly (28) is provided inside the connecting groove (27). The tensioning pulley (1) is rotatably connected to the opposite side of the two buffer assemblies (28).

2. The tractor tensioner adjustment mechanism according to claim 1, characterized in that: The buffer assembly (28) includes a connecting slide plate (281), which is slidably connected to the inner surface of the connecting groove (27). A bearing (282) that runs through the front and back is fixedly connected to the middle of the connecting slide plate (281), and the inner rings of the two bearings (282) are fixedly connected to the front and rear ends of the tension pulley (1) respectively.

3. The tractor tensioner adjustment mechanism according to claim 2, characterized in that: The left and right sides of the connecting slide plate (281) are slidably connected with support slides (283) that run vertically through each other, and the upper and lower ends of the support slides (283) are fixedly connected with threaded columns (284).

4. The tractor tensioner adjustment mechanism according to claim 3, characterized in that: The end of the threaded post (284) away from the supporting slide post (283) is fixedly connected to the inner wall of the connecting slide groove (27), and the outer surface of the threaded post (284) is threaded with a rotating nut (285).

5. The tractor tensioner adjustment mechanism according to claim 4, characterized in that: A buffer spring (286) is fixedly connected to the side of the rotating nut (285) near the connecting slide plate (281). The buffer spring (286) is sleeved on the outer surface of the supporting slide (283) and the end away from the rotating nut (285) is fixedly connected to the outer surface of the connecting slide plate (281).

6. The tractor tensioner adjustment mechanism according to claim 1, characterized in that: The bottom of the square frame (21) is fixedly connected to a rotating block (29), and the outer surface of the rotating block (29) is provided with three positioning slots (210) in a ring array.

7. The tractor tensioner adjustment mechanism according to claim 6, characterized in that: The fixed bracket (3) includes a support plate (31), and a mounting plate (32) is fixedly connected to the rear end of the support plate (31).

8. The tractor tensioner adjustment mechanism according to claim 7, characterized in that: The support plate (31) has a connecting groove (33) at the center of its front end, and the rotating block (29) is rotatably connected to the inside of the connecting groove (33).

9. A convenient adjustment mechanism for a tractor tensioner wheel according to claim 8, characterized in that: The support plate (31) has a sliding groove (34) that runs vertically through the middle. A transverse T-shaped card plate (35) is slidably connected to the inner surface of the sliding groove (34). The front end of the transverse T-shaped card plate (35) runs through the inner side of the connecting groove (33) and is slidably engaged with the inner side of the positioning slot (210).

10. A convenient adjustment mechanism for a tractor tensioner wheel according to claim 9, characterized in that: The upper and lower sides of the transverse T-shaped plate (35) are fixedly connected with sliding pull plates (36), and the rear side of the transverse T-shaped plate (35) is fixedly connected with a top spring (37). The rear end of the top spring (37) is fixedly connected to the rear side of the inner wall of the sliding groove (34).

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