An adjustable clearance gradually thick tooth worm gear transmission mechanism

Abstract

This utility model discloses an adjustable clearance gradually thickened tooth worm gear transmission mechanism, relating to the field of friction plate processing and production technology. It includes a worktable with a rotating worm gear at its bottom; a worm with helical teeth of varying thickness, the helical teeth being divided into thick and thin tooth sections; the worm being axially slidably connected to the worktable and axially movable; the helical teeth meshing with the worm gear; and an adjusting seat rotatably connected to and axially limited by the worm, which is engaged with the worktable by an adjusting locking ring. The adjusting locking ring is threadedly connected to the adjusting seat and fixedly connected to the worktable. This utility model allows for adjustment after gaps appear during a period of use, preventing excessive tooth backlash.

Description

Technical Field

[0001] This utility model relates to the field of friction plate processing and production technology, specifically to an adjustable clearance gradually thickened tooth worm gear transmission mechanism. Background Technology

[0002] Friction plates and clutch plates are common mechanical components. To improve the braking effect of friction plates and the disengagement or engagement effect of clutch plates, oil grooves need to be machined on the surface of the friction plates or clutch plates. Existing oil groove machining is generally achieved by modifying bench drills, manual mechanical indexing tables, and electromagnetic chucks. Existing machine tools consist of five main parts: the bed assembly, column assembly, worktable assembly, tool post assembly, and differential mechanism. These components are controlled by a simple PLC and require real-time manual operation. The worktable assembly has a rotating function, with a worm gear at the bottom for rotation. The worm gear meshes with a worm shaft, which is connected to the drive mechanism. The backlash (also called clearance or free play) between the worm shaft and the worm gear is a factor typically considered in the design, as it is crucial for preventing jamming due to thermal expansion and ensuring smooth operation. However, excessive backlash can lead to decreased transmission accuracy, increased noise, and aggravated vibration. Conversely, excessive backlash can cause overheating and accelerated wear. Utility Model Content

[0003] Technical problem to be solved by the utility model

[0004] To address the technical problems of existing worktables where gaps easily develop between the worm gear and worm shaft over time, leading to decreased transmission accuracy, increased noise, and aggravated vibration, and the risk of overheating and accelerated wear if the tooth backlash is adjusted too small during assembly, this utility model provides an adjustable gap gradually thickening tooth gear transmission mechanism. This mechanism can be adjusted after gaps appear during a period of use to prevent excessive tooth backlash.

[0005] Technical solution

[0006] To solve the above problems, the technical solution provided by this utility model is as follows:

[0007] An adjustable clearance gradually thickened tooth worm gear transmission mechanism includes a worktable with a worm gear for rotation at the bottom; a worm with helical teeth of uneven thickness, the helical teeth being divided into thick tooth sections and thin tooth sections, the worm being axially slidably connected to the worktable and axially movable, the helical teeth meshing with the worm gear; and an adjusting seat rotatably connected to and axially limited within the worm, the adjusting seat being engaged with the worktable by an adjusting locking ring, the adjusting locking ring being threadedly connected to the adjusting seat and fixedly connected to the worktable.

[0008] The worm gear is fixed to the bottom of the worktable and acts as the driven component, rotated by the worm. The helical teeth on the worm are divided into thick and thin sections. This design allows the backlash between the worm and worm gear to be altered by changing the worm's axial position relative to the worm gear. The worm and worktable are axially slidingly connected, meaning the worm can move along its axis. An adjusting seat is rotatably connected to the worm and axially limited, meaning the adjusting seat can rotate around the worm but cannot move axially. Adjusting the axial position of the adjusting seat controls the worm's axial position, thus controlling which portion of the thick and thin helical teeth meshes with the worm gear. The adjusting seat is fixed to the worktable by an adjusting locking ring, which is threaded to the adjusting seat. Rotating the adjusting seat changes the worm's position relative to the worm gear, allowing for fine-tuning of the backlash. When backlash needs to be reduced, the worm can be moved towards the worm wheel by rotating the adjusting seat, allowing the thicker teeth on the worm to mesh with the worm wheel. Conversely, to increase backlash, the worm can be moved away from the worm wheel, allowing the thinner teeth to contact the worm wheel. This real-time adjustment avoids problems such as reduced transmission efficiency, increased noise and vibration caused by excessive backlash, while preventing overheating and accelerated wear caused by insufficient backlash.

[0009] Optionally, the tooth thickness of the thick and thin tooth segments varies uniformly.

[0010] The uniformly varying tooth thickness allows for a smooth change in the tooth thickness meshing with the worm wheel during worm movement, reducing impact forces caused by abrupt changes, thereby lowering noise and vibration and improving transmission smoothness. Continuous and precise adjustment of the backlash between the worm and worm wheel can be achieved through the axial movement of the worm. Because the tooth thickness change is uniform, each adjustment can alter the backlash in very small increments, making the adjustment process more accurate and controllable.

[0011] Optionally, the worm gear is connected to a motor.

[0012] The electric motor acts as a power source, directly connecting to the worm gear to convert electrical energy into mechanical energy, driving the worm to rotate. The worm then transmits the rotational motion to the worm wheel through meshing, thereby driving the load.

[0013] Optionally, the workbench is provided with mounting hole one and mounting hole two. Mounting hole one mates with the adjusting seat, and mounting hole two mates with the bearing seat. The bearing seat is fixed to the workbench and the motor, and the worm gear is rotatably connected to the bearing seat through a bearing.

[0014] Mounting hole one mates with the adjusting seat to fix and position it. This ensures the adjusting seat remains stable on the worktable while allowing it to rotate around the worm gear axis for backlash adjustment. Mounting hole two mates with the bearing housing to fix and position it. This ensures the bearing housing is securely mounted on the worktable, providing a stable support point and guaranteeing smooth worm gear rotation.

[0015] Optionally, the sidewalls of the worktable at mounting hole one and mounting hole two are thickened.

[0016] The thickened sidewalls can withstand greater loads, ensuring that the worktable will not deform or be damaged under high-intensity working conditions. The thickened sidewalls also reduce vibration of the worktable during high-speed operation, improving system stability and accuracy.

[0017] Optionally, the end of the worm gear is provided with a limiting bolt and an annular step structure, and a bearing is engaged between the limiting bolt and the annular step structure and is rotatably connected to the adjusting seat through the bearing.

[0018] The main function of the limiting bolt and the annular step structure is to restrict the worm's axial movement and to engage the worm and bearing.

[0019] Optionally, the other end of the worm gear is provided with a limiting bolt and an annular step structure, and is connected to the output shaft of the motor via a coupling.

[0020] The coupling connects the worm gear and the motor output shaft to transmit power. It is easy to install and disassemble, and convenient to maintain and replace.

[0021] Optionally, the adjusting locking ring is fitted with a bolt, and the worktable is provided with a threaded hole, with the bolt engaging with the threaded hole.

[0022] By tightening the bolts, the adjusting locking ring can be fixed to the worktable to prevent it from loosening during operation.

[0023] Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] The technical solution provided by this utility model includes a worktable with a worm gear at the bottom for rotation; a worm with helical teeth of uneven thickness, the helical teeth being divided into thick and thin tooth sections, the worm being axially slidably connected to the worktable and axially movable, the helical teeth meshing with the worm gear; and an adjusting seat rotatably connected to and axially limited by the worm, which is engaged with the worktable by an adjusting locking ring, the adjusting locking ring being threadedly connected to the adjusting seat and fixed to the worktable. This provides a simple and effective means to maintain appropriate tooth backlash, avoiding problems such as reduced transmission efficiency, increased noise and vibration caused by excessive tooth backlash, and preventing overheating and accelerated wear caused by excessive tooth backlash. Furthermore, since adjustments can be made at any time according to actual working conditions, the reliability and service life of the system can be significantly improved. Attached Figure Description

[0026] Figure 1 A bottom cross-sectional view of an adjustable clearance gradually thick tooth worm gear transmission mechanism proposed for an embodiment of this utility model.

[0027] 1. Worm gear; 2. Worm; 201. Thick tooth section; 202. Thin tooth section; 3. Adjusting seat; 4. Adjusting lock ring; 5. Bearing seat; 6. Worktable; 7. Mounting hole one; 8. Motor; 9. Mounting hole two; 10. Coupling; Detailed Implementation

[0028] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0029] Example

[0030] Combined with appendix Figure 1 An adjustable clearance gradually thickened tooth worm gear transmission mechanism includes a worktable 6, with a worm gear 1 for rotation at the bottom of the worktable 6. The worktable 6 rotates by means of the worm gear 1, and a tooling fixing friction plate and a clutch plate are provided on the worktable 6.

[0031] The worm 2 has helical teeth of varying thickness, divided into thick tooth section 201 and thin tooth section 202. The worm 2 is axially slidably connected to the worktable 6 and can move axially. The helical teeth mesh with the worm wheel 1. The helical teeth are trapezoidal, meaning the tooth tip and root widths are different, typically narrower at the tip and wider at the root. The angle of the helical teeth can be optimized according to specific application requirements to improve transmission efficiency and reduce friction. The tooth thickness of the thick tooth section 201 and the thin tooth section 202 varies uniformly. The uniform variation in tooth thickness from one end of the worm 2 to the other facilitates continuous and precise adjustment of the backlash when adjusting the position of the worm 2. The trapezoidal tooth design reduces the contact area between the worm 2 and the worm wheel, thereby reducing friction loss and improving transmission efficiency. The trapezoidal tooth shape better adapts to the tooth shape of the worm wheel, improving meshing quality and reducing energy loss. The smooth transition of the trapezoidal tooth shape reduces impact and vibration, lowering noise during transmission. The uniform tooth thickness distribution results in a more even load distribution, reducing localized overload. The trapezoidal tooth profile design improves the fatigue resistance of the tooth surface, extending the system's service life. The uniform tooth thickness variation and optimized tooth profile reduce wear and improve system reliability. The trapezoidal helical tooth design allows the worm gear 2 to adjust backlash via axial movement, adapting to different working conditions and requirements. The uniform tooth thickness helps to cope with material expansion or contraction caused by temperature changes, maintaining stable transmission performance.

[0032] The adjusting seat 3 is rotatably connected to and axially limited by the worm gear 2. The adjusting seat 3 is engaged with the worktable 6 via an adjusting locking ring 4. The adjusting locking ring 4 is threadedly connected to the adjusting seat 3 and fixed to the worktable 6. The inner wall of the adjusting locking ring 4 is threaded, and the outer wall of the adjusting seat 3 is threaded. The worm gear 2 and the adjusting seat 3 are fixed axially. Rotating the adjusting seat 3 allows adjustment of its axial position relative to the adjusting locking ring 4. Since the adjusting locking ring 4 is fixed to the worktable 6, rotating the adjusting seat 3 allows adjustment of its axial position relative to the worktable 6.

[0033] The worm gear 2 is connected to a motor 8. The speed of the worm gear 2 can be easily controlled via the speed regulation function of the motor 8, which in turn affects the speed of the worm wheel. This is particularly important for applications requiring precise speed control, such as precision machining equipment and automated production lines. Transmission path: Motor 8, worm gear 2, worm wheel, load. The motor 8 transmits power to the worm wheel via the worm gear 2, and the worm wheel then drives the load.

[0034] The workbench 6 is provided with mounting hole 1 7 and mounting hole 2 9. Mounting hole 1 7 mates with adjusting seat 3, and mounting hole 2 9 mates with bearing seat 5. Bearing seat 5 is fixed to workbench 6 and motor 8. The bearing seat 5 is rotatably connected to worm gear 2 through bearing.

[0035] The side walls of the workbench 6 at mounting holes 1-7 and 2-9 are thickened.

[0036] The end of the worm gear 2 is provided with a limiting bolt and an annular step structure. A bearing is engaged between the limiting bolt and the annular step structure and is rotatably connected to the adjusting seat 3 through the bearing.

[0037] The other end of the worm gear 2 is provided with a limiting bolt and an annular step structure, as well as an output shaft connected to the motor 8 via a coupling 10.

[0038] The adjusting locking ring 4 is equipped with a bolt, and the worktable 6 is equipped with a threaded hole, with the bolt engaging with the threaded hole.

[0039] Adjustment method:

[0040] When a gap appears in the worm gear 2, loosen the adjusting locking ring 4 and the coupling 10, and use an Allen wrench to adjust the adjusting seat 3. Turning it counterclockwise tightens the worm gear 2 and turning it clockwise loosens it. After rotation, the axial position of the worm gear 2 changes, and the tooth thickness at the meshing position with the worm gear 1 also changes. After adjustment, lock the worm gear 2, adjust the locking ring 4 and the coupling 10 in the bearing seat 5 of the motor 8 to complete the adjustment.

[0041] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A worm gear transmission mechanism with adjustable clearance and gradually increasing tooth thickness, characterized in that, include The worktable has a worm gear at the bottom for rotation; A worm gear has helical teeth of varying thickness, the helical teeth being divided into thick tooth sections and thin tooth sections. The worm gear is axially slidably connected to the worktable and can move axially. The helical teeth mesh with the worm wheel. An adjusting seat is rotatably connected to and axially limited by the worm gear, and is engaged with the worktable by an adjusting locking ring. The adjusting locking ring is threadedly connected to the adjusting seat and fixed to the worktable.

2. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 1, characterized in that, The tooth thickness of the thick and thin tooth segments varies uniformly.

3. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 1, characterized in that, The worm gear is connected to a motor.

4. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 3, characterized in that, The workbench is provided with mounting hole one and mounting hole two. Mounting hole one mates with the adjusting seat, and mounting hole two mates with the bearing seat. The bearing seat is fixed to the workbench and the motor, and the worm gear is rotatably connected to the bearing seat through a bearing.

5. The adjustable clearance gradually thick tooth worm gear transmission mechanism according to claim 4, characterized in that, The sidewalls of the workbench at mounting hole one and mounting hole two are thickened.

6. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 3, characterized in that, The end of the worm gear is provided with a limiting bolt and an annular step structure. A bearing is engaged between the limiting bolt and the annular step structure and is rotatably connected to the adjusting seat through the bearing.

7. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 6, characterized in that, The other end of the worm gear is provided with a limiting bolt and an annular step structure, and is connected to the output shaft of the motor via a coupling.

8. The adjustable clearance gradually thickening tooth worm gear transmission mechanism according to claim 1, characterized in that, The adjusting locking ring is fitted with a bolt, and the worktable is provided with a threaded hole, with the bolt engaging with the threaded hole.

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