Self-adaptive adjustment transmission system based on chain shaking and abrasion elongation

Abstract

A self-adaptive adjusting transmission system based on chain shaking and abrasion elongation belongs to the technical field of chain transmission and comprises a driving chain wheel, a driven chain wheel and a chain in transmission connection between the driving chain wheel and the driven chain wheel, and a self-adaptive telescopic mechanism is connected between central shafts of the driving chain wheel and the driven chain wheel. The self-adaptive telescopic mechanism is connected with a self-adaptive jitter amplitude adjusting mechanism through a lever, the self-adaptive jitter amplitude adjusting mechanism is located above the chain tight edge and comprises a plurality of jitter amplitude adjusting units, and the jitter amplitude adjusting units are used for conducting self-adaptive regulation and control on the jitter amplitude of all parts of the chain tight edge. Aiming at continuous abrasion and elongation of the chain, on the premise that the wrap angle of the chain and the chain wheel is not changed, self-adaptive tensioning adjustment is carried out on the chain, and the shaking amplitude of the tight edge of the chain is self-adaptively adjusted.

Description

Technical Field

[0001] This invention belongs to the field of chain drive technology, specifically relating to an adaptive adjustment transmission system based on chain vibration and wear elongation. Background Technology

[0002] Over time, chains wear and stretch, leading to chain slack and affecting normal transmission. This also increases chain vibration. To address this issue, chain tensioners are typically used.

[0003] The chain tensioner is a core component of a chain drive system, primarily used to automatically adjust the chain tension to ensure the chain is always in optimal working condition. It uses elastic or hydraulic structures to compensate for chain slack caused by wear, stretching, or temperature changes in real time, preventing chain jumping, slippage, chain derailment, or excessive wear, thereby ensuring the stability, accuracy, and lifespan of the drive system.

[0004] Chain tensioners (or tension pulleys) are typically installed on the slack side of the chain. This is because the slack side has less chain tension, and placing the tension pulley here allows for more effective adjustment of chain tension, preventing skipping, chain slippage, or vibration caused by excessive sag, while also avoiding additional strain on the tight side, reducing wear and noise.

[0005] However, traditional chain tensioners increase the wrap angle between the chain and sprocket as they compress the chain upwards throughout its lifespan, making it difficult to guarantee the long-term stability of the chain drive system. At the same time, the tight side of the chain experiences wavy vibrations during operation, which also affects the stability of the transmission. Existing tensioners do not have effective measures for the tight side, and the actual vibration amplitude of different parts on the tight side is not consistent. Current equipment lacks a device for adaptive adjustment of the different vibration amplitudes of different parts.

[0006] In summary, the technical problems that need to be solved are how to adaptively adjust the tension and the vibration amplitude of the tight side of the chain while ensuring the size of the wrap angle between the chain and the sprocket as the chain continues to wear and elongate. Summary of the Invention

[0007] This invention discloses an adaptive adjustment transmission system based on chain vibration and wear elongation, aiming to solve the following technical problems: how to adaptively adjust the tension and the vibration amplitude of the tight side of the chain while ensuring the size of the wrap angle between the chain and the sprocket, in response to the continuous wear and elongation of the chain.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: An adaptive adjustment transmission system based on chain vibration and wear elongation includes a drive sprocket, a driven sprocket, and a chain drivingly connected between the drive sprocket and the driven sprocket. An adaptive telescopic mechanism is connected between the central shafts of the drive sprocket and the driven sprocket. The adaptive telescopic mechanism is connected to an adaptive vibration amplitude adjustment mechanism via a lever. The adaptive vibration amplitude adjustment mechanism is located above the tight side of the chain and includes several vibration amplitude adjustment units. Each vibration amplitude adjustment unit is used to adaptively control the vibration amplitude of different parts of the tight side of the chain.

[0009] Preferably, the central shaft of the drive sprocket is rotatably connected to the frame of the system, and the central shaft of the driven sprocket is slidably connected to the frame in a horizontal direction via a slider one, and the central shaft of the driven sprocket is rotatably connected to the slider one. Alternatively, the central shaft of the drive sprocket is slidably connected to the frame in a horizontal direction via a slider two, and the central shaft of the driven sprocket is slidably connected to the frame in a horizontal direction via a slider one, and the central shaft of the drive sprocket is rotatably connected to the slider two.

[0010] Preferably, the adaptive telescopic mechanism includes a sleeve, a first connecting rod and a second connecting rod slidably connected to both ends of the sleeve. One end of the first connecting rod is rotatably connected to the central shaft of the driving sprocket, and the other end is slidably sleeved inside the sleeve. One end of the second connecting rod is rotatably connected to the central shaft of the driven sprocket, and the other end is slidably sleeved inside the sleeve on the side away from the first connecting rod. A baffle is fixedly provided on the first connecting rod and the second connecting rod respectively. A compression spring is also provided between the baffle and the end on the same side of the sleeve. The compression spring is sleeved on the outside of the first connecting rod or the second connecting rod.

[0011] Preferably, the adaptive jitter amplitude adjustment mechanism includes a fixed rod arranged along the length of the chain, a movable rod arranged above the fixed rod and parallel to the fixed rod, and several jitter amplitude adjustment units arranged side by side below the movable rod. Each jitter amplitude adjustment unit includes a limiting post fixedly arranged on the outer surface of the fixed rod and a jitter amplitude suppression block. The jitter amplitude suppression block has a longitudinally arranged strip hole. The limiting post passes through the strip hole and is slidably connected to the strip hole. An energy absorption component is connected between the upper end of the jitter amplitude suppression block and the bottom end of the movable rod. The fixed rod is fixedly connected to the frame.

[0012] Preferably, the vibration amplitude suppression block is a cubic structure with a concave arc surface at the bottom facing the driven sprocket. The bottom of the vibration amplitude suppression block maintains a set distance from the tight edge of the chain. When the chain is running, the concave arc surface contacts the chain that is displaced upward due to vibration and is used to suppress the wave-like vibration amplitude of the chain.

[0013] Preferably, the vibration damping component is a miniature viscous damper or a vibration damping rubber block, and each vibration amplitude suppression block is used to adaptively suppress the vibration amplitude of each part of the tight edge of the chain.

[0014] Preferably, the movable rod is slidably connected to the frame via a linear guide rail vertically disposed on the frame surface. The lever includes a short rod and a long rod. One end of the short rod is hinged to a connecting lug fixedly disposed on one side of the top of the movable rod. The other end of the short rod is hinged to one end of the long rod. The other end of the long rod is hinged to the outer wall of the second connecting rod. The short rod is hinged to the frame surface via a hinge shaft. In the initial state, the short rod is tilted upward toward the driven sprocket side.

[0015] Preferably, a connecting block is fixedly provided on the outer surface of the connecting ear, the connecting block is provided with a sliding hole for the short rod to pass through, and the end of the short rod is provided with a limiting block to prevent the short rod from disengaging from the sliding hole.

[0016] Preferably, the vibration damping component is configured to dissipate the vibration energy transmitted by the chain's tight-side shaking, and the weight of the movable rod is such that it cannot be lifted by the upward force of the chain shaking, but can be pulled upward by a lever under the action of a compressed spring.

[0017] The beneficial effects of the adaptive adjustment transmission system based on chain vibration and wear elongation of the present invention are as follows: (1) While the chain wears and elongates, the present invention can adaptively adjust the center distance between the driving sprocket and the driven sprocket, and adjust the tension of the chain in real time without changing the wrap angle between the chain and the sprocket.

[0018] (2) The adaptive jitter amplitude adjustment mechanism of the present invention is provided with several jitter amplitude adjustment units, which can adaptively adjust the jitter peaks of different sizes at different positions of the tight side of the chain, thereby effectively reducing the jitter amplitude of the chain and promoting the stable operation of the chain system.

[0019] (3) While the chain wears and elongates, the present invention can also move the movable rod upward simultaneously, thereby driving the vibration amplitude adjustment unit to move upward. In order to adapt to the vibration amplitude control of chains with larger pitches, it avoids the transitional collision with the vibration peak of the chain, thereby achieving a better adaptive control effect. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of the present invention; Figure 2 1. Detailed structural diagram of a portion of the present invention; Figure 3 1. Detailed structural diagram of a portion of the connecting ear of the present invention; Figure 4A top-view schematic diagram of the cooperation between the driving sprocket and the driven sprocket with the frame in one embodiment of the present invention.

[0021] The diagram shows the following markings: 1. Driven sprocket; 2. Chain; 3. Drive sprocket; 4. Movable rod; 5. Energy absorption assembly; 6. Vibration amplitude adjustment unit; 7. Fixed rod; 8. First connecting rod; 9. Compression spring; 10. Sleeve; 11. Baffle; 12. Second connecting rod; 13. Long rod; 14. Connecting ear; 141. Connecting block; 142. Sliding hole; 15. Hinge shaft; 16. Hinge point of long and short rods; 17. Limiting post; 18. Vibration amplitude suppression block; 19. Strip hole; 20. Concave arc surface; 21. Short rod; 211. Limiting block; 22. Linear guide rail; 23. Frame; 24. Linear slide groove two; 25. Slider two; 26. Linear slide groove one; 27. Slider one. Detailed Implementation

[0022] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0023] The following embodiments can be understood as illustrating a part of the structure or method of the present invention individually, or as combining the embodiments to explain the broader structure or method of the present invention.

[0024] Example 1: An adaptive adjustment transmission system based on chain vibration and wear elongation, such as Figure 1 , 2 As shown, the device includes a drive sprocket 3, a driven sprocket 1, and a chain 2 that is connected between the drive sprocket 3 and the driven sprocket 1. An adaptive telescopic mechanism is connected between the central shafts of the drive sprocket 3 and the driven sprocket 1. The adaptive telescopic mechanism is connected to an adaptive vibration amplitude adjustment mechanism via a lever. The adaptive vibration amplitude adjustment mechanism is located above the tight side of the chain 2 and includes several vibration amplitude adjustment units 6. Each vibration amplitude adjustment unit 6 is used to adaptively adjust the vibration amplitude of each part of the tight side of the chain.

[0025] Example 2: like Figure 1 , 4As shown, the central shaft of the driving sprocket 3 is rotatably connected to the frame 23 where the system is located, and the central shaft of the driven sprocket 1 is slidably connected to the frame 23 in a horizontal direction via slider 1 27. The central shaft of the driven sprocket 1 is rotatably connected to slider 1 27. Alternatively, the central shaft of the driving sprocket 3 is slidably connected to the frame 23 in a horizontal direction via slider 25, and the central shaft of the driven sprocket 1 is slidably connected to the frame 23 in a horizontal direction via slider 1 27. The central shaft of the driving sprocket 3 is rotatably connected to slider 25. In other words, The driving sprocket 3 and driven sprocket 1 have two installation configurations. In one configuration, the driving sprocket 3 is fixed relative to the frame 23 and can only rotate relative to it, while the driven sprocket 1 can move horizontally and rotate relative to slider 27. In the other configuration, both the driving sprocket 3 and driven sprocket 1 can move back and forth horizontally and rotate relative to slider 25 and slider 27, respectively. The surface of the frame 23 should be provided with linear grooves (24 / 26) for sliding slider 27 or slider 25 to precisely control the movement trajectory of the central shaft. The frame 23 can be installed at both ends of the central shaft and slidably connected to the frame 23 via slider 27 or slider 25, respectively.

[0026] Example 3: like Figure 1 As shown, the adaptive telescopic mechanism includes a sleeve 10, a first connecting rod 8 and a second connecting rod 12 slidably connected to both ends of the sleeve 10. One end of the first connecting rod 8 is rotatably connected to the central axis of the drive sprocket 3, and the other end is slidably sleeved inside the sleeve 10. One end of the second connecting rod 12 is rotatably connected to the central axis of the driven sprocket 1, and the other end is slidably sleeved inside the sleeve 10 on the side away from the first connecting rod 8. A baffle 11 is fixedly provided on the first connecting rod 8 and the second connecting rod 12 respectively. A compression spring 9 is also provided between the baffle 11 and the end on the same side of the sleeve 10. The compression spring 9 is sleeved on the outside of the first connecting rod 8 or the second connecting rod 12. The compression spring is pre-compressed. When the chain wears and elongates, the center distance between the drive sprocket and the driven sprocket increases. The two compression springs drive the first connecting rod and the second connecting rod to extend outward, continuing to provide thrust to the central axis of the drive sprocket and the driven sprocket. Thus, without changing the chain wrap angle with the sprocket, the chain tension is achieved synchronously with the chain elongation.

[0027] Example 4: like Figure 1 , 2As shown, the adaptive jitter amplitude adjustment mechanism includes a fixed rod 7 arranged along the length of the chain 2, a movable rod 4 arranged above the fixed rod 7 and parallel to the fixed rod 7, and several jitter amplitude adjustment units arranged side by side below the movable rod 4. The jitter amplitude adjustment unit includes a limiting post 17 fixedly arranged on the outer surface of the fixed rod 7 and a jitter amplitude suppression block 18. The jitter amplitude suppression block 18 is provided with a longitudinally arranged strip hole 19. The limiting post 17 passes through the strip hole 19 and is slidably connected to the strip hole 19. An energy absorption component 5 is connected between the upper end of the jitter amplitude suppression block 18 and the bottom end of the movable rod 4. The fixed rod 7 is fixedly connected to the frame.

[0028] like Figure 1 As shown, the driven sprocket rotates counterclockwise, causing the chain to vibrate in a wave-like manner. This vibration is different from ordinary vibration (the principle of vibration refers to the phenomenon of an object or system making periodic reciprocating motions near its equilibrium position). In order to avoid the chain system from becoming unstable due to excessive vibration amplitude, an adaptive vibration amplitude adjustment mechanism is set up. This mechanism is essentially a control of the vibration amplitude rather than a control of the vibration amplitude. The vibration amplitude suppression block 18 can float up and down along the limit post 17 through the strip hole 19, and the force transmitted by the chain vibration is consumed by the energy absorption component 5.

[0029] Specifically, the vibration amplitude suppression block 18 has a cubic structure. The bottom of the cubic structure facing the driven sprocket 1 has a concave arc surface 20. The bottom end of the vibration amplitude suppression block 18 maintains a set distance from the tight edge of the chain. When the chain is running, the concave arc surface 20 contacts the chain that is displaced upward due to vibration and is used to suppress the wave-like vibration amplitude of the chain.

[0030] During chain vibration, several wave-shaped peaks are formed. These peaks impact the concave arc surface 20, causing the vibration amplitude suppression block 18 to move upwards. The energy-absorbing component 5 dissipates the vibration energy, suppressing the vibration amplitude. Simultaneously, due to the chain's force transmission, a wave peak suppressed by a vibration amplitude suppression block 18 transforms into a vibration peak at the next position. Under the combined effect, wave peaks at different positions of the chain impact different vibration amplitude suppression blocks 18, thus having their energy dissipated by the corresponding energy-absorbing components. From another perspective, the amplitude of the wave peaks generated by the chain driven by the driven sprocket varies at different positions on the tight side. Therefore, by setting several vibration amplitude adjustment units, adjustment functions can be achieved for wave peaks of different heights. Because the impact energy brought by the wave peaks is different, the elastic contraction amplitude of the energy-absorbing component 5 is different, thus allowing for targeted vibration amplitude control of each wave peak. However, if a single tension plate is used to control the jitter amplitude, it cannot adaptively adjust to each wave peak; it can only cause a hard collision with a number of wave peaks. This not only increases noise but also results in a less effective control over the stability of the tight side compared to the solution provided in this embodiment. This embodiment, by setting several jitter amplitude adjustment units, can adaptively adjust the wave peaks at different positions on the tight side, making the chain system operate more stably.

[0031] Example 5: like Figure 1 , 2 As shown, the vibration damping component 5 is a miniature viscous damper or a vibration damping rubber block, and each vibration amplitude suppression block 18 is used to adaptively suppress the vibration amplitude of each part of the tight edge of the chain.

[0032] Example 6: like Figure 1 , 2 As shown, the movable rod 4 is slidably connected to the frame via a linear guide rail 22 vertically disposed on the surface of the frame. The lever includes a short rod 21 and a long rod 13 (the long rod can be a straight rod or a curved rod to avoid interference with the chain). One end of the short rod 21 is hinged to a connecting lug 14 fixedly disposed on the top side of the movable rod 4, and the other end of the short rod 21 is hinged to one end of the long rod 13. The other end of the long rod 13 is hinged to the outer wall of the second connecting rod 12. The short rod 21 is hinged to the surface of the frame via a hinge shaft 15. In the initial state, the short rod is tilted upward toward the driven sprocket side.

[0033] In this embodiment, when the chain elongates, the compression spring drives the second connecting rod to push the driven sprocket outward. The second connecting rod drives the long rod to pull the short rod. According to the lever principle, the other end of the short rod pulls the connecting ear upward, which in turn drives the movable rod 4 upward. The movable rod drives each set of vibration amplitude adjustment units to move upward, increasing the distance between them and the chain. The principle behind this design is that as the chain lengthens due to wear, its pitch increases, and the vibration amplitude increases. By increasing the distance between the vibration amplitude adjustment units and the chain, it can adapt to the vibration amplitude of the elongated chain and adjust it adaptively, while also avoiding excessive impact with the chain's wave crests.

[0034] Example 7: like Figure 3 As shown, a connecting block 141 is fixedly provided on the outer surface of the connecting ear 14. The connecting block 141 has a sliding hole 142 for the short rod 21 to pass through, and a limiting block 211 is provided at the end of the short rod 21 to prevent the short rod 21 from disengaging from the sliding hole 142. During the process of the short rod driving the connecting ear to move upward, the short rod can adaptively adjust its position within the sliding hole.

[0035] like Figure 1 , 2 As shown, the vibration damping component 5 is configured to dissipate the vibration energy transmitted by the chain's tight-side vibration. The weight of the movable rod satisfies the condition that it cannot be lifted by the upward force of the chain vibration, but can be pulled upward by a lever under the action of a compressed spring. Therefore, the energy of the chain vibration will not be transmitted to the adaptive telescopic mechanism.

Claims

1. An adaptive adjustment transmission system based on chain vibration and wear elongation, characterized in that: It includes a drive sprocket, a driven sprocket, and a chain that drives between the drive sprocket and the driven sprocket. An adaptive telescopic mechanism is connected between the central shafts of the drive sprocket and the driven sprocket. The adaptive telescopic mechanism is connected to an adaptive vibration amplitude adjustment mechanism via a lever. The adaptive vibration amplitude adjustment mechanism is located above the tight side of the chain and includes several vibration amplitude adjustment units. Each vibration amplitude adjustment unit is used to adaptively adjust the vibration amplitude of different parts of the tight side of the chain.

2. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 1, characterized in that: The central shaft of the drive sprocket is rotatably connected to the frame of the system. The central shaft of the driven sprocket is slidably connected to the frame in a horizontal direction via slider one. The central shaft of the driven sprocket is rotatably connected to slider one. Alternatively, the central shaft of the drive sprocket is slidably connected to the frame in a horizontal direction via slider two. The central shaft of the driven sprocket is slidably connected to the frame in a horizontal direction via slider one. The central shaft of the drive sprocket is rotatably connected to slider two.

3. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 2, characterized in that: The adaptive telescopic mechanism includes a sleeve, a first connecting rod and a second connecting rod slidably connected to both ends of the sleeve. One end of the first connecting rod is rotatably connected to the central shaft of the driving sprocket, and the other end is slidably sleeved inside the sleeve. One end of the second connecting rod is rotatably connected to the central shaft of the driven sprocket, and the other end is slidably sleeved inside the sleeve on the side away from the first connecting rod. Baffles are fixedly provided on the first connecting rod and the second connecting rod respectively. A compression spring is also provided between the end of the baffle and the end on the same side of the sleeve. The compression spring is sleeved on the outside of the first connecting rod or the second connecting rod.

4. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 3, characterized in that: The adaptive jitter amplitude adjustment mechanism includes a fixed rod arranged along the length of the chain, a movable rod arranged above the fixed rod and parallel to the fixed rod, and several jitter amplitude adjustment units arranged side by side below the movable rod. Each jitter amplitude adjustment unit includes a limiting post fixedly arranged on the outer surface of the fixed rod and a jitter amplitude suppression block. The jitter amplitude suppression block has a longitudinally arranged strip hole. The limiting post passes through the strip hole and is slidably connected to the strip hole. An energy absorption component is connected between the upper end of the jitter amplitude suppression block and the bottom end of the movable rod. The fixed rod is fixedly connected to the frame.

5. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 4, characterized in that: The vibration amplitude suppression block is a cubic structure. The bottom of the cubic structure facing the driven sprocket has a concave arc surface. The bottom of the vibration amplitude suppression block maintains a set distance from the tight edge of the chain. When the chain is running, the concave arc surface contacts the chain that is displaced upward due to vibration and is used to suppress the wave-like vibration amplitude of the chain.

6. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 5, characterized in that: The vibration damping components are miniature viscous dampers or vibration damping rubber blocks, and each vibration amplitude suppression block is used to adaptively suppress the vibration amplitude of each part of the tight side of the chain.

7. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 6, characterized in that: The movable rod is slidably connected to the frame via a linear guide rail vertically mounted on the frame surface. The lever includes a short rod and a long rod. One end of the short rod is hinged to a connecting lug fixedly mounted on one side of the top of the movable rod. The other end of the short rod is hinged to one end of the long rod. The other end of the long rod is hinged to the outer wall of the second connecting rod. The short rod is hinged to the frame surface via a hinge shaft. In the initial state, the short rod is tilted upwards towards the driven sprocket.

8. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 7, characterized in that: A connecting block is fixedly provided on the outer surface of the connecting ear. The connecting block is provided with a sliding hole for the short rod to pass through. The end of the short rod is provided with a limiting block to prevent the short rod from dislodging from the sliding hole.

9. The adaptive adjustment transmission system based on chain vibration and wear elongation as described in claim 8, characterized in that: The vibration damping component is configured to dissipate the vibration energy transmitted by the chain's tight-side shaking, and the weight of the movable rod is such that it cannot be lifted by the upward force of the chain shaking, but can be pulled upward by a lever under the action of a compressed spring.

Images