Accurate measurement and adjustment device for bicycle chain pitch

Abstract

The utility model discloses a bicycle chain pitch precision measurement and adjusting device, including L type board, the top fixed connection of L type board has the connecting plate, be provided with positioning mechanism on the connecting plate, the side surface clamping of L type board is close to the fixed link of top, be provided with measuring mechanism on the fixed link. The utility model discloses, through the positioning mechanism of setting, can install L type board fast in bicycle rear lower fork, so that the equipment can be adapted to different models of bicycle, increase its practicality, then utilize the measuring mechanism on fixed link, the pitch of bicycle chain is measured, then through electric push rod drive connecting block, the height of rotating shaft and sprocket is adjusted, thereby reach the purpose of chain tightening, make chain emergency use, and then reach the purpose of bicycle emergency riding, reduce the risk when driving.

Description

Technical Field

[0001] This utility model relates to the field of bicycle parts technology, and in particular to a device for precise measurement and adjustment of bicycle chain pitch. Background Technology

[0002] The bicycle chain is the core component of the bicycle drivetrain, used to connect the freewheel and gears, converting the rider's pedaling force into the power of the wheel's rotation. Chain pitch generally refers to the chain pitch, that is, the center distance between the chain rollers, but it can also refer to gear pitch and thread pitch, indicating the distance between corresponding points on two adjacent thread profiles.

[0003] In existing technologies, after prolonged use and wear, the chain pitch of bicycles increases, leading to chain slippage or skipped teeth. This shortens the lifespan of the bicycle, increases the danger of riding, affects the safety of riders, and greatly reduces the performance of the equipment. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device for precise measurement and adjustment of bicycle chain pitch.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bicycle chain pitch precision measurement and adjustment device, comprising an L-shaped plate, a connecting plate fixedly connected to the top of the L-shaped plate, a positioning mechanism provided on the connecting plate, a fixing rod snapped onto the side of the L-shaped plate near the top, a measuring mechanism provided on the fixing rod, an electric push rod fixedly connected to the top of the L-shaped plate, a connecting block fixedly connected to the top of the electric push rod, a rotating shaft provided on the surface of the connecting block, a sprocket keyed to the outer contour of the rotating shaft, a sliding groove formed on the surface of the L-shaped plate, and a slider with a limit and sliding connection fixedly connected to the connecting block near the sliding groove.

[0006] As a further description of the above technical solution:

[0007] The positioning mechanism includes a mounting block disposed on the inner wall of the connecting plate near the top. Sliding rods are symmetrically mounted on the inner wall of the connecting plate near the top. Sliding grooves adapted to the sliding rods are opened on both sides of the mounting block. Snap-fit ​​parts are symmetrically disposed on the side of the mounting block.

[0008] As a further description of the above technical solution:

[0009] The snap-fit ​​component includes symmetrically formed movable grooves on the side of the mounting block. The inner wall of the movable groove is provided with an adjustment groove. A return spring is provided on the inner wall of the adjustment groove. A snap-fit ​​rod is provided on the inner wall of the adjustment groove, which contacts the end of the return spring. A snap-fit ​​groove for snap-fit ​​rod to snap through is provided on the sliding rod and the sliding groove. A movable rod is slidably connected to the snap-fit ​​rod on the side near the movable groove. A movable block is fixedly connected to the end of the movable rod.

[0010] As a further description of the above technical solution:

[0011] The measuring mechanism includes a connecting rod 1 fixedly connected to a fixed rod near the L-shaped plate. A movable groove is formed through the fixed rod near the connecting rod 1. A movable plate is slidably connected to the inner wall of the movable groove away from the connecting rod 1. A connecting rod 2 is formed through the movable plate. Both the ends of the connecting rod 1 and the connecting rod 2 are fixedly connected to locking blocks. A movable block is fixedly connected to the movable plate away from the locking blocks. A connecting shaft that penetrates the movable plate is provided on the inner wall of the movable groove. A return spring 2 is sleeved on the outer contour of the connecting shaft. An insertion hole is provided on the L-shaped plate for the two locking blocks to engage. A scale is provided on the side of the fixed rod.

[0012] As a further description of the above technical solution:

[0013] The mounting block has a threaded rod at its top, a rotating block fixedly connected to the top of the threaded rod, a clamping plate at the bottom of the threaded rod, a bearing on the clamping plate, and the inner ring of the bearing connected to the outer contour of the threaded rod near the bottom.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the adjustment groove is provided with a plug hole for the moving rod to be engaged.

[0016] This utility model has the following beneficial effects:

[0017] Compared with existing technologies, this bicycle chain pitch precision measurement and adjustment device, through its positioning mechanism, can quickly install an L-shaped plate on the bicycle's rear chainstay, making the device adaptable to different bicycle models and increasing its practicality. Then, the measuring mechanism on the fixed rod measures the bicycle chain pitch, and subsequently, the height of the connecting block, rotating shaft, and sprocket is adjusted by an electric push rod, thereby achieving the purpose of tightening the chain. This allows the chain to be used in emergencies, enabling emergency riding and reducing the danger of riding. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall main structure of the bicycle chain pitch precision measurement and adjustment device proposed in this utility model.

[0019] Figure 2 This is a partial side view of the overall structure of the bicycle chain pitch precision measurement and adjustment device proposed in this utility model.

[0020] Figure 3 The present invention provides a device for precise measurement and adjustment of bicycle chain pitch. Figure 1 A magnified structural diagram at point A;

[0021] Figure 4 This is a cross-sectional view of the positioning mechanism of the bicycle chain pitch precision measurement and adjustment device proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the main structure of the measuring mechanism of the bicycle chain pitch precision measuring and adjustment device proposed in this utility model.

[0023] Figure 6 This is a side view of the measuring mechanism of the bicycle chain pitch precision measuring and adjustment device proposed in this utility model.

[0024] Legend:

[0025] 1. L-shaped plate; 2. Connecting plate; 3. Fixed rod; 4. Electric push rod; 5. Connecting block; 51. Slide groove; 6. Rotating shaft; 7. Sprocket; 8. Mounting block; 81. Threaded rod; 82. Rotating block; 83. Clamping plate; 9. Sliding rod; 10. Sliding groove; 11. Moving groove; 12. Adjusting groove; 13. Return spring one; 14. Snap-fit ​​rod; 15. Moving rod; 16. Moving block; 17. Insertion hole; 18. Connecting rod one; 19. Movable groove; 20. Movable plate; 21. Connecting rod two; 22. Snap-fit ​​block; 23. Scale; 24. Movable block; 25. Connecting shaft; 26. Return spring two. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figure 1-6The present invention provides a bicycle chain pitch precision measurement and adjustment device, including an L-shaped plate 1, a connecting plate 2 fixedly connected to the top of the L-shaped plate 1, a positioning mechanism provided on the connecting plate 2, a fixing rod 3 snapped onto the side of the L-shaped plate 1 near the top, a measuring mechanism provided on the fixing rod 3, an electric push rod 4 fixedly connected to the top of the L-shaped plate 1, a connecting block 5 fixedly connected to the top of the electric push rod 4, a rotating shaft 6 provided on the surface of the connecting block 5, a sprocket 7 keyed to the outer contour of the rotating shaft 6, a groove 51 opened on the surface of the L-shaped plate 1, and a slider with a limit and sliding connection in the groove 51 fixedly connected to the side of the connecting block 5 near the groove 51.

[0028] First, the L-shaped plate 1 is quickly installed on the rear chainstay of the bicycle using the positioning mechanism, making the device compatible with different bicycle models and increasing its practicality. Then, the measuring mechanism on the fixing rod 3 is used to measure the pitch of the bicycle chain. Subsequently, the height of the connecting block 5, the rotating shaft 6, and the sprocket 7 are adjusted by activating the electric push rod 4, thereby achieving the purpose of tightening the chain and enabling emergency use of the chain, thus achieving the purpose of emergency riding of the bicycle. When the connecting block 5 moves, the slider on the connecting block 5 slides in the slide groove 51, reducing the friction when the connecting block 5 moves, further increasing the practicality of the device during use.

[0029] The positioning mechanism includes a mounting block 8 disposed on the inner wall of the connecting plate 2 near the top. Sliding rods 9 are symmetrically mounted on the inner wall of the connecting plate 2 near the top. Sliding grooves 10, adapted to the sliding rods 9, are provided on both sides of the mounting block 8. Snap-fit ​​components are symmetrically arranged on the sides of the mounting block 8. Each snap-fit ​​component includes a moving groove 11 symmetrically opened on the sides of the mounting block 8. An adjusting groove 12 is provided on the inner wall of the moving groove 11. A return spring 13 is disposed on the inner wall of the adjusting groove 12. A snap-fit ​​rod 14, contacting the end of the return spring 13, is disposed on the inner wall of the adjusting groove 12. The sliding rods 9 and... A snap-fit ​​groove for snap-fitting rod 14 is provided through the sliding groove 10. A moving rod 15 is slidably connected to the side of the snap-fit ​​rod 14 near the moving groove 11. A moving block 16 is fixedly connected to the end of the moving rod 15. A threaded rod 81 is provided on the top of the mounting block 8. A rotating block 82 is fixedly connected to the top of the threaded rod 81. A clamping plate 83 is provided at the bottom of the threaded rod 81. A bearing is provided on the clamping plate 83. The inner ring of the bearing is connected to the outer contour of the threaded rod 81 near the bottom. An insertion hole 17 for snap-fitting moving rod 15 is provided on the inner wall of the adjusting groove 12.

[0030] First, pull the moving block 16 deeper into the adjusting groove 12. This causes the moving block 16 to move the moving rod 15 within the moving groove 11, simultaneously moving the locking rod 14 within the adjusting groove 12. The locking rod 14 then sequentially enters the adjusting groove 12 through the locking slots on the sliding rod 9 and the sliding groove 10. The locking rod 14, now inside the adjusting groove 12, compresses the return spring 13. After the moving block 16 can no longer move, push the moving block 16 to push the moving rod 15 towards the insertion hole 17, locking the moving rod 15 into the insertion hole 17. At this point, the moving rod 15 in another positioning mechanism is locked into the insertion hole 17 using the same method. Then, pull down the mounting block 8, separating the sliding groove 10 on the mounting block 8 from the sliding rod 9 on the connecting plate 2. Next, connect the connecting plate 2 to the bicycle rear fork, and then... The sliding groove 10 on the upper part engages with the sliding rod 9 on the connecting plate 2, moving the mounting block 8 to the inner wall of the connecting plate 2. Then, the operator pulls the two moving blocks 16 outward in sequence, causing the moving blocks 16 to remove the moving rod 15 from the insertion hole 17. Then, the elastic potential energy generated by the compressed return spring 13 is used to fix the locking rod 14 in place and reset it. Then, the locking rod 14 passes through the locking groove on the sliding groove 10 and enters the locking groove opened on the sliding rod 9. Then, the threaded rod 81 is rotated, causing the rotating block 82 to rotate downward. At the same time, the rotating block 82 and the clamping plate 83 also move downward. Because of the bearing, the clamping plate 83 will not rotate with the rotating block 82. The cooperation of the connecting plate 2 and the clamping plate 83 can clamp the top of the bicycle rear chainstay, making the equipment compatible with different models of bicycles, thus increasing the practicality of the equipment.

[0031] The measuring mechanism includes a connecting rod 18 fixedly connected to the fixed rod 3 near the L-shaped plate 1. A movable groove 19 is provided through the fixed rod 3 near the connecting rod 18. A movable plate 20 is slidably connected to the inner wall of the movable groove 19 away from the connecting rod 18. A connecting rod 21 is provided through the movable plate 20. The ends of both the connecting rod 18 and the connecting rod 21 are fixedly connected to a locking block 22. A movable block 24 is fixedly connected to the movable plate 20 away from the locking block 22. A connecting shaft 25 is provided through the movable plate 20 on the inner wall of the movable groove 19. A return spring 26 is sleeved on the outer contour of the connecting shaft 25. An insertion hole is provided on the L-shaped plate 1 for the two locking blocks 22 to engage. A scale 23 is provided on the side of the fixed rod 3.

[0032] When using the equipment, remove the two snap-fit ​​blocks 22 from the holes on the L-shaped plate 1, then remove the fixing rod 3 from the L-shaped plate 1. Next, move the movable block 24 to move the movable plate 20 on the outer contour of the connecting shaft 25, thereby pressing the connecting rod 21 through the movable plate 20. After the connecting rod 21 moves, insert the connecting rod 21 and the connecting rod 18 into the chain to measure its pitch. Observe the pitch value through the scale 23. Then remove the connecting rod 21 and the connecting rod 18 from the chain. Use the elastic potential energy generated by the pressed return spring 26 to reset the movable plate 20. This allows for accurate measurement of the chain pitch during use, increasing the practicality of the equipment.

[0033] Working principle: First, pull the moving block 16 deeper into the adjusting groove 12, so that the moving block 16 drives the moving rod 15 to move in the moving groove 11, and at the same time, drives the locking rod 14 to move in the adjusting groove 12. The locking rod 14 enters the adjusting groove 12 sequentially from the locking groove on the sliding rod 9 and the locking groove on the sliding groove 10. The locking rod 14 in the adjusting groove 12 compresses the return spring 13. After the moving block 16 can no longer move, push the moving block 16 to push the moving rod 15 towards the insertion hole 17, and lock the moving rod 15 into the insertion hole 17. At this time, the moving rod 15 in another positioning mechanism is locked into the insertion hole 17 by the above method. Then, pull down the mounting block 8, so that the sliding groove 10 on the mounting block 8 separates from the sliding rod 9 on the connecting plate 2. Then, the connecting plate 2 and The bicycle rear fork is connected, and then the sliding groove 10 on the mounting block 8 is engaged with the sliding rod 9 on the connecting plate 2. The mounting block 8 is moved to the inner wall of the connecting plate 2. Then, the worker pulls the two moving blocks 16 outward in turn, so that the moving blocks 16 drive the moving rod 15 to be removed from the insertion hole 17. Then, the elastic potential energy generated by the compressed return spring 13 is used to fix the locking rod 14 and reset it. Then, the locking rod 14 passes through the locking groove on the sliding groove 10 and enters the locking groove opened on the sliding rod 9. Then, the threaded rod 81 is rotated, so that the rotating block 82 rotates downward and the rotating block 82 and the clamping plate 83 also move downward. Because of the bearing, the clamping plate 83 does not rotate with the rotating block 82. The top of the bicycle rear lower fork can be clamped by the cooperation of the connecting plate 2 and the clamping plate 83.

[0034] Subsequently, the two snap-fit ​​blocks 22 are removed from the insertion holes on the L-shaped plate 1. Then, the fixing rod 3 is removed from the L-shaped plate 1. Next, the movable block 24 is moved to drive the movable plate 20 on the outer contour of the connecting shaft 25 to move, thereby pressing the connecting rod 21 through the movable plate 20. After the connecting rod 21 moves, the connecting rod 21 and the connecting rod 18 are inserted into the chain to measure their pitch. The pitch value is observed through the scale 23. Then, the connecting rod 21 and the connecting rod 18 are removed from the chain. The movable plate 20 is reset by the elastic potential energy generated by the compressed return spring 26, so that the chain pitch can be accurately measured when the equipment is used.

[0035] Finally, the electric push rod 4 is activated to adjust the height of the connecting block 5, the rotating shaft 6, and the sprocket 7, thereby tightening the chain and enabling emergency use of the chain, thus achieving the purpose of emergency riding of the bicycle.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for precise measurement and adjustment of bicycle chain pitch, comprising an L-shaped plate (1), characterized in that: A connecting plate (2) is fixedly connected to the top of the L-shaped plate (1). A positioning mechanism is provided on the connecting plate (2). A fixing rod (3) is snapped onto the side of the L-shaped plate (1) near the top. A measuring mechanism is provided on the fixing rod (3). An electric push rod (4) is fixedly connected to the top of the L-shaped plate (1). A connecting block (5) is fixedly connected to the top of the electric push rod (4). A rotating shaft (6) is provided on the surface of the connecting block (5). A sprocket (7) is keyed onto the outer contour of the rotating shaft (6). A sliding groove (51) is opened on the surface of the L-shaped plate (1). A slider with a limit and sliding connection in the sliding groove (51) is fixedly connected to the side of the connecting block (5) near the sliding groove (51).

2. The bicycle chain pitch precision measurement and adjustment device according to claim 1, characterized in that: The positioning mechanism includes an installation block (8) disposed on the inner wall of the connecting plate (2) near the top. A sliding rod (9) is symmetrically installed on the inner wall of the connecting plate (2) near the top. Sliding grooves (10) adapted to the sliding rods (9) are opened on both sides of the installation block (8). Snap-fit ​​parts are symmetrically arranged on the side of the installation block (8).

3. The bicycle chain pitch precision measurement and adjustment device according to claim 2, characterized in that: The snap-fit ​​component includes a movable groove (11) symmetrically opened on the side of the mounting block (8). The inner wall of the movable groove (11) is provided with an adjustment groove (12). The inner wall of the adjustment groove (12) is provided with a return spring (13). The inner wall of the adjustment groove (12) is provided with a snap-fit ​​rod (14) that contacts the end of the return spring (13). The sliding rod (9) and the sliding groove (10) are provided with snap-fit ​​grooves for snap-fit ​​rod (14) to snap-fit. A movable rod (15) is slidably connected to the side of the snap-fit ​​rod (14) near the movable groove (11). The end of the movable rod (15) is fixedly connected to a movable block (16).

4. The bicycle chain pitch precision measurement and adjustment device according to claim 1, characterized in that: The measuring mechanism includes a connecting rod 1 (18) fixedly connected to the side of the fixed rod (3) near the L-shaped plate (1). A movable groove (19) is provided through the side of the fixed rod (3) near the connecting rod 1 (18). A movable plate (20) is slidably connected to the inner wall of the movable groove (19) away from the connecting rod 1 (18). A connecting rod 2 (21) is provided through the movable plate (20). A snap-fit ​​block (22) is fixedly connected to the ends of both the connecting rod 1 (18) and the connecting rod 2 (21). A movable block (24) is fixedly connected to the side of the movable plate (20) away from the snap-fit ​​block (22). A connecting shaft (25) is provided through the inner wall of the movable groove (19) and passes through the movable plate (20). A reset spring 2 (26) is sleeved on the outer contour of the connecting shaft (25). An insertion hole is provided on the L-shaped plate (1) for the two snap-fit ​​blocks (22) to snap into. A scale (23) is provided on the side of the fixed rod (3).

5. The bicycle chain pitch precision measurement and adjustment device according to claim 2, characterized in that: The mounting block (8) is provided with a threaded rod (81) at the top, and a rotating block (82) is fixedly connected to the top end of the threaded rod (81). A clamping plate (83) is provided at the bottom end of the threaded rod (81), and a bearing is provided on the clamping plate (83). The inner ring of the bearing is connected to the outer contour of the threaded rod (81) near the bottom.

6. The bicycle chain pitch precision measurement and adjustment device according to claim 3, characterized in that: The inner wall of the adjustment groove (12) is provided with a plug hole (17) for the moving rod (15) to be engaged.

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