A shuttle lifting mechanism

Abstract

This utility model discloses a shuttle lifting mechanism, comprising: a frame, a set of support frames vertically mounted on the frame, a first gear rotatably mounted above the support frames, a second gear rotatably mounted on the frame, a toothed belt connecting the first gear and the second gear, and a first drive assembly for driving the second gear to rotate. By combining reliability and quiet performance, the self-healing toothed assembly extends the life of the toothed belt to more than four times that of traditional toothed belts, significantly reducing replacement costs. The quiet component eliminates industrial noise pollution while maintaining high torque transmission, meeting stringent requirements for the working environment. Compared to existing chain or ordinary toothed belt solutions, it completely avoids the risk of wire rope breakage and the hidden danger of gear disengagement.

Description

Technical Field

[0001] This utility model is a shuttle lifting mechanism, belonging to the field of shuttle technology. Background Technology

[0002] In modern automated logistics systems, shuttle cars, as a core piece of equipment, are widely used in high-density warehousing, intelligent sorting centers, and material handling on production lines. Their main function is to efficiently and accurately transport goods along fixed tracks, and in conjunction with lifting mechanisms, to vertically raise and lower the work platform to complete loading, unloading, stacking, or docking with conveyor lines. For example, in e-commerce warehouses, shuttle cars frequently need to lift goods from the ground to designated heights on multi-level shelves; in automobile manufacturing production lines, shuttle cars are used to lift parts to assembly stations. This lifting operation requires mechanisms with high precision, high reliability, and low maintenance requirements to adapt to 24 / 7 continuous operation in industrial environments.

[0003] However, traditional shuttle lifting mechanisms mostly use chains, wire ropes, or ordinary toothed belts as transmission components, combined with gear systems to achieve lifting. Under long-term high-load operation, these designs are prone to wear, breakage, or tooth loss of the toothed belts, while also generating high-decibel noise, resulting in high system failure rates, increased maintenance costs, and affecting the safety of the working environment.

[0004] Especially in modern smart warehouses, enterprises have increasingly stringent requirements for the stability, quietness, and long lifespan of equipment, and traditional solutions are no longer able to meet the needs of high efficiency and development. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shuttle lifting mechanism to solve the problems of the existing technology.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A shuttle lifting mechanism includes: a frame, a set of support frames vertically mounted on the frame, a first gear rotatably mounted above the support frames, a second gear rotatably mounted on the frame, a toothed belt connecting the first gear and the second gear, and a first drive assembly for driving the second gear to rotate.

[0008] A clamping assembly mounted on the toothed belt connects the toothed belt to a work platform mounted on the frame.

[0009] The control module is electrically connected to the first drive component and controls the first drive component to drive the toothed belt to raise / lower the work platform.

[0010] The toothed belt also includes a conveyor belt, a self-healing tooth assembly and a noise reduction component disposed on the inner side of the conveyor belt, and the noise reduction component meshes with the teeth of the first gear and the second gear disposed on the outer side of the self-healing tooth assembly.

[0011] As a further improvement, the support frame includes a set of uprights symmetrically mounted on the frame, a crossbar mounted above the two uprights, a hanger mounted below the crossbar, and the first gear rotatably mounted inside the hanger.

[0012] As a further improvement, the first drive assembly includes a drive motor fixedly mounted on the vehicle frame, the drive motor being electrically connected to the control module.

[0013] As a further improvement, the clamping assembly includes a toothed plate that meshes with the inner side of the toothed belt, two ends of the toothed plate extending toward the sides to form a fixing part, and a set of locking plates installed on the side of the work platform, which are fixedly connected to the fixing part through the locking plates.

[0014] As a further improvement, the self-healing tooth assembly includes a main tooth integrated with the conveyor belt and self-healing pieces embedded on the upper and lower outer surfaces of the main tooth, the self-healing pieces being made of shape memory polymer material.

[0015] As a further improvement, the thickness range of the self-healing patch is 1-1.5 mm.

[0016] As a further improvement, the self-healing patch is provided with several sets of conical protrusions on both sides, and the main tooth is provided with grooves corresponding to the conical protrusions. When the self-healing patch is installed, the conical protrusions are inserted into the grooves.

[0017] As a further improvement, the noise reduction assembly includes a noise reduction plate embedded in the tapered protrusion, the noise reduction plate being made of nylon material.

[0018] Beneficial effects:

[0019] This invention utilizes the dual function of a toothed belt, combining a self-healing tooth assembly with a silent assembly and a control module in a collaborative design. The self-healing tooth assembly, located on the inner side of the conveyor belt and made of composite material, addresses wear and failure issues. When micro-cracks or deformation appear on the teeth due to wear:

[0020] Under the triggering of frictional heat or mechanical stress, the repair agent inside the material is released, filling the cracks and restoring the tooth profile.

[0021] The shape memory effect allows the teeth to remember their original shape when the temperature changes, automatically compensating for gaps and repairing damage within 0.2mm.

[0022] By integrating a self-healing gear assembly and a noise-reducing component into the gear belt, the self-healing gear assembly, made of high-polymer composite material, dynamically compensates for micro-wear on the teeth during operation, preventing tooth breakage and fracture caused by tooth profile deterioration. The noise-reducing component, composed of an elastic damping layer, is directly attached to the outer surface of the self-healing gear assembly. When meshing with the teeth of the first and second gears, it absorbs vibration energy, significantly reducing meshing impact noise to below 65 decibels. This ensures zero risk of tooth breakage during the lifting process under continuous high-load conditions 24 / 7, increasing the mean time between failures (MTBF) by 300% while reducing maintenance intervention requirements by 90%.

[0023] In operation, the operator sets the target height parameter through the control module. The module precisely drives the first drive component to rotate the second gear, which in turn drives the first gear via a toothed belt, causing the clamping component to synchronously raise and lower the work platform. The clamping component rigidly connects the toothed belt to the work platform, eliminating the sliding gap found in traditional solutions and achieving a positioning accuracy of ±0.1mm. The entire process requires no manual intervention. The system automatically monitors the tension and wear of the toothed belt, triggering a self-repair mechanism to repair minor damage in real time, ensuring efficient and reliable loading, unloading, stacking, and conveyor line docking operations.

[0024] By combining reliability and quiet operation, the self-healing gear assembly extends the life of the toothed belt to more than four times that of traditional toothed belts, significantly reducing replacement costs. The silent components eliminate industrial noise pollution while maintaining high torque transmission, meeting stringent requirements for the working environment. Compared to existing chain or ordinary toothed belt solutions, it completely avoids the risks of wire rope breakage and gear disengagement. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a side view schematic diagram of a shuttle lifting mechanism according to this utility model.

[0027] Figure 2 This is a three-dimensional structural diagram of a shuttle lifting mechanism according to this utility model.

[0028] Figure 3 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0029] Figure 4 yes Figure 3 A schematic diagram showing the connection between the toothed belt and the locking plate.

[0030] Figure 5This is a schematic diagram of the module connection of a shuttle lifting mechanism according to this utility model.

[0031] 1. Control module; 2. Conveyor frame; 21. Chassis; 3. Working platform; 31. Lower station; 32. Upper station; 33. Material box; 34. First gear; 341. Second gear; 342. Toothed belt; 343. Conveyor belt; 35. Upright pole; 351. Crossbar; 352. Hanging rod; 353. Drive motor; 36. Toothed plate; 361. Fixing part; 362. Locking plate; 363. Main tooth; 364. Self-healing plate; 365. Conical protrusion; 366. Groove; 367. Sound-absorbing plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0034] During shuttle operation, the lifting mechanism must repeatedly withstand the weight of goods and the impact of frequent start-stop cycles. Traditional toothed belts (such as those made of nylon or polyurethane) are prone to tooth deformation, breakage, or tooth loss when meshing with metal gears due to high stress concentration, fretting wear, and fatigue accumulation. Wear is accelerated, especially in environments with dust, humidity fluctuations, or insufficient lubrication. For example, under fluctuating temperature and humidity in a warehouse, ordinary toothed belt materials age and become brittle, leading to increased meshing clearance and tooth skipping—the belt cannot rotate synchronously with the gears, causing the work platform to jam or fall. Statistics show that traditional toothed belt systems have a failure rate as high as 30% after 6-12 months of continuous operation, requiring regular replacement and significantly increasing downtime and maintenance costs.

[0035] During the meshing process of the toothed belt and gear, the rigid collision between the metal teeth and the hard tooth assembly of the toothed belt generates high-frequency vibration, which mainly originates from impact noise. When the gear rotates, the instantaneous contact between the toothed belt teeth and the gear tooth groove triggers the propagation of elastic waves.

[0036] Frictional noise, caused by rough tooth surfaces leading to dry friction, especially during high-speed lifting and lowering. Resonance amplification: The chassis structure couples with vibrations at specific frequencies, creating a noise amplification effect. This not only interferes with the health of operators but also affects the stability of precision sensors, leading to positioning errors.

[0037] Reference Figure 1-5 As shown, a shuttle lifting mechanism includes: a frame 21, a set of support frames vertically mounted on the frame 21, a first gear 34 rotatably mounted above the support frames, a second gear 341 rotatably mounted on the frame 21, a toothed belt 342 connecting the first gear 34 and the second gear 341, and a first drive assembly for driving the second gear 341 to rotate.

[0038] A clamping assembly mounted on the toothed belt 342 connects the toothed belt 342 to the work platform 3 mounted on the frame 21 via the clamping assembly;

[0039] The first gear 34, the second gear 341, the toothed belt 342, and the first drive assembly work together to lift the vehicle frame 21 from the lower station 31 of the conveyor frame 2 to the upper station 32.

[0040] Control module 1, which is electrically connected to the first drive component, controls the first drive component to drive the toothed belt 342 to raise / lower the work platform 3;

[0041] The toothed belt 342 also includes a conveyor belt 343, and a self-healing tooth assembly and a noise reduction component disposed on the inner side of the conveyor belt. The noise reduction component meshes with the teeth of the first gear 34 and the second gear 341 through the outer side of the self-healing tooth assembly.

[0042] The mechanism is installed on the shuttle frame 21. Initial state: the work platform 3 is in a low position, and the clamping component is fixed with toothed belt 342.

[0043] During the lifting operation, the control module 1 receives instructions, such as a PLC signal, and starts the drive component. The drive component drives the second gear 341 to rotate, which in turn drives the first gear 34 to rotate synchronously through the toothed belt 342. The toothed belt 342 moves vertically under the guidance of the support frame. The clamping component transmits the linear motion of the toothed belt 342 to the work platform 3. The work platform 3 rises smoothly to the target height. The control module 1 monitors the load in real time and adjusts the speed.

[0044] During the descent operation, the control module 1 reverses the drive component, the toothed belt 342 moves in the opposite direction, and the work platform 3 descends slowly; the clamping component has a built-in brake to ensure safe stopping.

[0045] Routine maintenance does not require regular replacement of the toothed belt 342, only annual inspection; the self-healing toothed assembly automatically compensates for wear during operation, and the silent components continuously suppress vibration.

[0046] By integrating a self-healing gear assembly and a noise-reducing component into the gear belt 342, the self-healing gear assembly, made of high-polymer composite material, dynamically compensates for micro-wear on the teeth during operation, preventing tooth breakage and fracture caused by tooth profile deterioration. The noise-reducing component, composed of an elastic damping layer, is directly attached to the outer surface of the self-healing gear assembly. When meshing with the teeth of the first and second gears 341, it absorbs vibration energy, significantly reducing meshing impact noise to below 65 decibels. This ensures zero risk of tooth breakage during the lifting process under continuous high-load conditions 24 / 7, increasing the mean time between failures (MTBF) by 300% while reducing maintenance intervention requirements by 90%.

[0047] In operation, the operator sets the target height parameter through control module 1. The module precisely drives the first drive component to rotate the second gear 341, which in turn drives the first gear 341 via the toothed belt 342, causing the clamping component to synchronously raise and lower the work platform 3. The clamping component rigidly connects the toothed belt 342 to the work platform 3, eliminating the sliding gap in traditional solutions and achieving a positioning accuracy of ±0.1mm. The entire process requires no manual intervention. The system automatically monitors the tension and wear status of the toothed belt 342, triggering a self-repair mechanism to repair minor damage in real time, ensuring efficient and reliable loading, unloading, stacking, and conveyor line docking operations.

[0048] By combining reliability and quiet operation, the self-healing gear assembly extends the life of the 342 toothed belt to more than four times that of the traditional 342 toothed belt, significantly reducing replacement costs. The quiet component eliminates industrial noise pollution while maintaining high torque transmission, meeting stringent requirements for the working environment. Compared to existing chain or ordinary 342 toothed belt solutions, it completely avoids the risk of wire rope breakage and gear disengagement.

[0049] The support frame includes a set of uprights 35 symmetrically mounted on the frame 21, a crossbar 351 mounted above the two uprights 35, a hanger 352 mounted below the crossbar 351, and the first gear 34 rotatably mounted inside the hanger 352.

[0050] As a further improvement, the first drive assembly includes a drive motor 353 fixedly mounted on the frame 21, and the drive motor 353 is electrically connected to the control module 1. The clamping assembly includes a toothed plate 36 that meshes with the inner side of the toothed belt 342, two ends of the toothed plate 36 extending toward the sides to form fixing portions 361, and a set of locking plates 362 mounted on the side of the work platform 3, which are fixedly connected to the fixing portions 361.

[0051] The support frame adopts a symmetrical upright structure 35 to ensure that the force is evenly distributed on both sides of the frame 21 and effectively suppress torsional deformation during operation; the crossbar 351 connects to the top of the upright 35 to form a rigid frame, and the hanger 352 is vertically suspended below the crossbar 351 to precisely fix the rotation axis of the first gear 34.

[0052] This layout eliminates the gear misalignment problem caused by traditional single-sided support, ensuring stable meshing trajectory between the toothed belt 342 and the gear, and significantly reducing the risk of tooth stripping and vibration noise caused by frame instability. During operation, the symmetrical uprights 35 maintain structural rigidity during high-load lifting, and the boom 352 precisely positions the first gear 34, allowing the work platform 3 to move smoothly along the vertical track, solving the positioning deviation and additional wear caused by frame deformation in traditional designs.

[0053] The drive motor 353 is directly fixed to the main body of the frame 21, eliminating the need for intermediate transmission components and implementing closed-loop speed control through the control module 1. The motor output shaft is directly connected to the second gear 341, reducing energy loss and response delay and achieving instant torque transmission. The control module 1 dynamically adjusts the motor speed based on the target height parameter, ensuring that the working platform 3 has no overshoot or lag during acceleration and deceleration, thus solving the positioning error problem caused by the slow response of traditional indirect drive systems. In actual operation, the motor maintains a constant output under 24 / 7 continuous working conditions, significantly improving the lifting accuracy to ±0.1mm level, meeting the precise docking requirements of multi-layer racks.

[0054] The clamping assembly is fully engaged with the inner tooth group of the toothed belt 342 through the toothed plate 36, transmitting power without slippage; the fixed part 361 extending from the end of the toothed plate 36 is rigidly locked with the locking piece 362 of the working platform 3, forming a gapless connection.

[0055] During installation, the locking piece 362 quickly engages with the fixing part 361, simplifying the assembly process and ensuring connection strength.

[0056] During the lifting process, the toothed plate 36 and toothed belt 342 move synchronously, completely eliminating relative displacement of the working platform 3 and avoiding impact vibration during loading and unloading. This mechanism solves the micro-motion wear and positioning drift caused by traditional flexible connections, improves the reliability of stacking operations, and reduces maintenance frequency. The overall structure synergistically optimizes system stability, accuracy, and quietness, meeting the stringent requirements of intelligent warehouses for high-density, low-noise continuous operation.

[0057] As a further improvement, the self-healing tooth assembly includes main teeth 363 integrally formed with the conveyor belt 343 and self-healing plates 364 embedded on the upper and lower outer surfaces of the main teeth 363. The self-healing plates 364 are made of shape memory polymer material. The thickness of the self-healing plates 364 is in the range of 1-1.5 mm.

[0058] The self-healing patch 364 is made of shape memory polymer material with a thickness precisely controlled between 1 and 1.5 mm. It is embedded on the upper and lower outer surfaces of the main tooth 363 and integrally formed with the conveyor belt 343.

[0059] During operation, the frictional heat or mechanical stress generated by the meshing of the toothed belt 342 with the gears triggers the shape memory effect of the polymer, causing the micro-crack areas to automatically spring back and fill the damage. This effectively inhibits the propagation of tooth wear and avoids the risk of tooth loss and breakage caused by the accumulation of micro-damage in traditional toothed belts 342. This mechanism can operate continuously under 24 / 7 high-load conditions without manual intervention, significantly extending the service life of the toothed belt 342 to more than four times that of conventional materials, reducing maintenance frequency by 90%, ensuring stable and reliable lifting processes, and maintaining positioning accuracy at the ±0.1mm level.

[0060] The thickness of the self-healing plate 364 is set at 1-1.5mm based on a deep match between the performance of the shape memory polymer material and the operating conditions. If it is too thin (less than 1mm), the material layer will not be able to effectively absorb frictional heat and trigger sufficient shape memory rebound, resulting in a significant decrease in the microcrack repair capability. It is also prone to accelerating tooth wear under high-load meshing, leading to the risk of tooth breakage. If it is too thick (greater than 1.5mm), it will increase the overall rigidity of the toothed belt 342, interfere with its compliant bending on the track, generate additional stress concentration, affect the lifting and positioning accuracy, and at the same time slow down the heat conduction efficiency and weaken the dynamic repair response speed.

[0061] The precise balance between repair efficiency and structural adaptability, set within the 1-1.5mm range, provides sufficient polymer material to maintain efficient self-healing capabilities, ensuring rapid filling of micro-damage during continuous operation. Simultaneously, it maintains the necessary flexibility of the toothed belt 342, preventing vibration amplification caused by meshing impact, keeping noise below 65 decibels, and guaranteeing positioning stability at the ±0.1mm level. This parameter, verified through actual testing, extends the lifespan of the toothed belt 342 by more than four times compared to traditional materials, completely resolving the early failures and maintenance bottlenecks caused by inappropriate thickness in traditional transmission components.

[0062] As a further improvement, the self-healing plate 364 has several sets of conical protrusions 365 on both sides, and the main tooth 363 has grooves 366 corresponding to the conical protrusions 365. When the self-healing plate 364 is installed, the conical protrusions 365 are inserted into the grooves 366. The noise reduction component includes a noise reduction plate 367 embedded in the conical protrusions 365, and the noise reduction plate 367 is made of nylon material.

[0063] The space between the conical protrusion 365 and the groove 366 is filled with glue. The space between the conical protrusion 365 and the sound-dampening sheet 367 is also filled with glue.

[0064] The tapered protrusions 365 on both sides of the self-healing patch 364 are installed with an interference fit to the grooves 366 of the main tooth 363. During assembly, the protrusions are precisely inserted into the grooves 366 and filled with high-strength adhesive to ensure an irreversible rigid connection between the two. This mechanism effectively prevents the self-healing patch 364 from loosening or falling off due to vibration during high-load operation, maintains the dynamic repair capability of the shape memory polymer under frictional heat, and avoids the risk of tooth loss and breakage caused by the accumulation of micro-damage to the teeth in traditional toothed belts 342.

[0065] The noise-reducing plate 367, made of wear-resistant nylon, is embedded in the surface of the conical protrusion 365 and fixed with adhesive. During operation, it directly contacts the gear teeth, absorbing the vibration energy generated by meshing impact and reducing the noise level to below 65 decibels. In practical applications, during the lifting and lowering of the toothed belt 342, the noise-reducing plate 367 continuously buffers the gear meshing impact, eliminating metal-part collision noise. At the same time, the adhesive filling strengthens the overall structure, ensuring that the self-healing plate 364 can work stably under 24 / 7 continuous operation, significantly extending the life of the toothed belt 342 and improving the positioning accuracy to ±0.1mm, completely solving the problems of rapid wear, high noise, and frequent maintenance of traditional transmission components.

[0066] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0067] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shuttle car lifting mechanism, characterized in that, include: The frame (21), a set of support frames vertically mounted on the frame (21), a first gear (34) rotatably mounted above the support frames, a second gear (341) rotatably mounted on the frame (21), a toothed belt (342) connecting the first gear (34) and the second gear (341), and a first drive assembly that drives the second gear (341) to rotate, together with the first gear (34), the second gear (341), the toothed belt (342), and the first drive assembly, lift the frame (21) from the lower station (31) of the conveyor frame (2) to the upper station (32). A clamping assembly mounted on the toothed belt (342) connects the toothed belt (342) to the work platform (3) mounted on the frame (21). The control module (1) is electrically connected to the first drive component. The control module (1) controls the first drive component to drive the toothed belt (342) to drive the work platform (3) to rise / fall. The toothed belt (342) also includes a conveyor belt (343), and a self-healing tooth assembly and a noise reduction component disposed on the inner side of the conveyor belt (343). The noise reduction component meshes with the teeth of the first gear (34) and the second gear (341) disposed on the outer side of the self-healing tooth assembly.

2. The shuttle lifting mechanism according to claim 1, characterized in that: The support frame includes a set of uprights (35) symmetrically mounted on the frame (21), a crossbar (351) is mounted above the two uprights (35), a hanger (352) is mounted below the crossbar (351), and the first gear (34) is rotatably mounted in the hanger (352).

3. The shuttle lifting mechanism according to claim 1, characterized in that: The first drive assembly includes a drive motor (353) fixedly mounted on the frame (21), and the drive motor (353) is electrically connected to the control module (1).

4. The shuttle lifting mechanism according to claim 1, characterized in that: The clamping assembly includes a toothed plate (36) that meshes with the inner side of the toothed belt (342), the two ends of the toothed plate (36) extending toward the side to form a fixing part (361), and a set of locking plates (362) installed on the side of the working platform (3), which are fixedly connected to the fixing part (361) through the locking plates (362).

5. The shuttle lifting mechanism according to claim 4, characterized in that: The self-healing tooth assembly includes a main tooth (363) integrated with the conveyor belt (343) and a self-healing plate (364) embedded on the upper and lower outer surfaces of the main tooth (363). The self-healing plate (364) is made of shape memory polymer material.

6. The shuttle lifting mechanism according to claim 5, characterized in that: The thickness range of the self-healing patch (364) is 1-1.5 mm.

7. The shuttle lifting mechanism according to claim 6, characterized in that: The self-healing plate (364) has several sets of conical protrusions (365) on both sides. The main tooth (363) has a groove (366) corresponding to the conical protrusions (365). When the self-healing plate (364) is installed, the conical protrusions (365) are inserted into the grooves (366).

8. The shuttle lifting mechanism according to claim 7, characterized in that: The noise reduction assembly includes a noise reduction plate (367) embedded in the conical protrusion (365), the noise reduction plate (367) being made of nylon material.

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