Clutch lifter

Abstract

The utility model discloses a kind of clutch lifting devices, including clutch mechanism, output shaft mechanism and sliding table mechanism, the output shaft mechanism is inserted to the inside of clutch mechanism, the sliding table mechanism is provided on the clutch mechanism, the clutch mechanism includes worm mechanism, clutch shaft mechanism, disc spring, clutch washer and cap mechanism. The utility model and the recessed and protruding block setting on clutch shaft mechanism select appropriate step height and angle, can reduce working torque and improve rotation accuracy;When the output shaft mechanism is blocked by external force and cannot rotate normally, worm mechanism can still drive clutch shaft mechanism to operate, and in order to prevent motor from burning due to long-time block, the recessed and protruding structure with slope that is set between worm mechanism and clutch shaft mechanism cooperates, can make worm mechanism overcome disc spring counterforce under certain conditions, force clutch shaft mechanism to be pressed away from a certain height.

Description

Technical Field

[0001] This utility model relates to the technical field of drive devices for electric rearview mirrors for automobiles, specifically a clutch lifting device. Background Technology

[0002] In the drive mechanism of an electric folding rearview mirror, when the mirror is jammed due to icing or external impact, the motor continues to operate, generating excessive torque that can easily damage its internal transmission components. Therefore, the overload protection clutch becomes a critical component of this system, its function being to cut off power transmission when external resistance exceeds a set value, thus protecting the core transmission mechanism.

[0003] Currently, the clutch technologies used in this application mainly include the following solutions:

[0004] Helical spring clutch: It transmits torque by cooperating with the groove of the gear ring, and slips when overloaded. However, it often requires two springs with opposite directions of helix to be arranged symmetrically, which increases the variety of parts and the complexity of assembly.

[0005] C-shaped snap ring clutch: Engagement and disengagement are achieved through the elastic deformation of a C-shaped snap ring. To balance the force, multiple snap rings are usually installed side by side, which places high demands on space layout and may affect the stability and accuracy of torque setting.

[0006] Spring-type clutch: It uses the deformation of the spring to achieve clutch, but its response characteristics and durability may face challenges in different environments.

[0007] Therefore, we propose a clutch lifting device. Utility Model Content

[0008] The purpose of this invention is to provide a clutch lifting device to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a clutch lifting device, comprising a clutch mechanism, an output shaft mechanism, and a slide mechanism. The output shaft mechanism is inserted into the interior of the clutch mechanism. The slide mechanism is provided on the clutch mechanism. The clutch mechanism includes a worm gear mechanism, a clutch shaft mechanism, disc springs, clutch washers, and a retaining cover mechanism. The retaining cover mechanism is engaged with the bottom of the worm gear mechanism. The output shaft mechanism is inserted into the interior of the worm gear mechanism. The clutch shaft mechanism is provided inside the worm gear mechanism. Two sets of clutch washers are provided inside the worm gear mechanism and outside the output shaft mechanism. Multiple sets of disc springs are provided between the two sets of clutch washers and outside the output shaft mechanism.

[0010] Furthermore, the worm gear mechanism includes a worm body and a concave-convex ring, with the concave-convex ring fixedly installed inside the worm body. The cover mechanism includes a cover body and a pawl, with multiple sets of pawls fixedly connected to the cover body and inserted into the worm gear mechanism.

[0011] Furthermore, the clutch shaft mechanism includes a clutch shaft body and a convex-concave block. The clutch shaft body is disposed inside the worm gear body, and the convex-concave block is fixedly installed on the top of the clutch shaft body at the recessed position corresponding to the convex-concave ring.

[0012] Furthermore, the output shaft mechanism includes an output shaft body and a second boss. The output shaft body is inserted into the worm gear body, and multiple sets of second bosses are fixedly connected to the outer wall of the output shaft body.

[0013] Furthermore, the slide mechanism includes a slide body, a first boss and a positioning groove. Multiple sets of first bosses are fixedly connected to the top of the slide body, and a positioning groove is formed between two adjacent sets of first bosses. The second boss is inserted into the positioning groove.

[0014] Furthermore, both the cover mechanism and the clutch shaft mechanism are made of plastic materials.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the entire device is in operation, the present invention changes the contact area between the slide mechanism and the output shaft mechanism, thereby reducing the contact area between the output shaft mechanism and the slide mechanism. This setting not only reduces the loss during the rotation process, but also reduces wear, thereby reducing the subsequent maintenance costs.

[0016] By selecting appropriate step height and angle for the protrusions and concave blocks on the clutch shaft mechanism, the working torque can be reduced and the rotational accuracy improved.

[0017] When the output shaft mechanism is blocked by external force and cannot rotate normally, the worm gear mechanism can still drive the clutch shaft mechanism to operate. Moreover, in order to prevent the motor from burning out due to prolonged stalling, the interlocking concave and convex structure between the worm gear mechanism and the clutch shaft mechanism is inclined. Under certain conditions, the worm gear mechanism can overcome the disc spring reaction force and force the clutch shaft mechanism to be pressed away from a certain height, forming a "slippage" phenomenon, thereby cutting off the transmission chain and playing a protective role.

[0018] The different step heights and angles of the convex and concave blocks on the clutch shaft mechanism affect the magnitude of the working torque. This allows the clutch shaft mechanism to adjust the step coverage and angle of the convex and concave blocks according to specific application requirements to adapt to working conditions in different scenarios. At the same time, the two clutch washers ensure that the disc spring can slide circumferentially, avoiding direct contact with the plastic cover mechanism and clutch shaft mechanism, thus solving the problems of scraping or poor rotation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 This is a perspective view of the clutch mechanism, output shaft mechanism and slide mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the slide mechanism of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the output shaft mechanism of this utility model.

[0024] In the diagram: 1. Clutch mechanism; 2. Output shaft mechanism; 3. Slide mechanism; 4. Worm gear mechanism; 5. Clutch shaft mechanism; 6. Disc spring; 7. Clutch washer; 8. Cover mechanism; 9. Slide body; 10. First boss; 11. Positioning groove; 12. Worm gear body; 13. Concave-convex ring; 14. Clutch shaft body; 15. Concave-convex block; 16. Cover body; 17. Claw; 18. Output shaft body; 19. Second boss. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-5 This utility model provides a technical solution: a clutch lifting device, including a clutch mechanism 1, an output shaft mechanism 2, and a slide mechanism 3. The output shaft mechanism 2 is inserted into the clutch mechanism 1. The slide mechanism 3 is provided on the clutch mechanism 1. The clutch mechanism 1 includes a worm gear mechanism 4, a clutch shaft mechanism 5, a disc spring 6, a clutch washer 7, and a retaining cover mechanism 8. The retaining cover mechanism 8 is engaged with the bottom of the worm gear mechanism 4. The output shaft mechanism 2 is inserted into the worm gear mechanism 4. The clutch shaft mechanism 5 is provided inside the worm gear mechanism 4. Two sets of clutch washers 7 are provided inside the worm gear mechanism 4 and outside the output shaft mechanism 2. Multiple sets of disc springs 6 are provided between the two sets of clutch washers 7 and outside the output shaft mechanism 2.

[0027] In this device, by changing the contact area between the slide mechanism 3 and the output shaft mechanism 2 during operation, the contact area between the output shaft mechanism 2 and the slide mechanism 3 is reduced. This not only reduces losses during rotation but also reduces wear, thereby lowering subsequent maintenance costs. The appropriate step height and angle of the protrusions 15 on the clutch shaft mechanism 1 can reduce the working torque and improve rotational accuracy. When the output shaft mechanism 2 is blocked by external force and cannot rotate normally, the worm gear mechanism 4 can still drive the clutch shaft mechanism 5. Furthermore, to prevent the motor from burning out due to prolonged stalling, the interlocking protrusions between the worm gear mechanism 4 and the clutch shaft mechanism 5 have a certain slope. Under specific conditions, this allows the worm gear mechanism 4 to overcome the reaction force of the disc spring 6 and forcibly press the clutch shaft mechanism 5 away from a certain height, creating a "slippage" phenomenon, thus cutting off the transmission chain and providing protection. The different step heights and angles of the protrusions 15 on the clutch shaft mechanism 5 affect the working torque, allowing the clutch shaft mechanism 5 to adjust the step coverage and angle of the protrusions 15 according to specific application requirements to adapt to different working conditions.

[0028] Please see Figures 1-5 The worm gear mechanism 4 includes a worm body 12 and a concave-convex ring 13. The concave-convex ring 13 is fixedly installed inside the worm body 12. The cover mechanism 8 includes a cover body 16 and a claw 17. Multiple sets of claws 17 that are fixedly connected to the cover body 16 are inserted into the worm gear mechanism 4. The clutch shaft mechanism 5 includes a clutch shaft body 14 and a concave-convex block 15. The clutch shaft body 14 is disposed inside the worm body 12. A concave-convex block 15 is fixedly installed on the top of the clutch shaft body 14 and at the recessed position corresponding to the concave-convex ring 13. The output shaft mechanism 2 includes an output shaft body 18 and a second boss 19. The output shaft body 18 is inserted into the worm body 12. Multiple sets of second bosses 19 are fixedly connected to the outer wall of the output shaft body 18.

[0029] The second boss 19 on the output shaft body 18 can be axially fixed to the worm gear body 12 through a keyway. The pawl 17 on the cover body 16 can be engaged with the worm gear body 12. Between the worm gear body 12 and the cover body 16, there are sequentially arranged a clutch shaft structure 5, a clutch washer 7, a disc spring 6, and another clutch washer 7. This arrangement prevents the output shaft body 18 from rotating normally when blocked by external force. When the worm gear body 12 is outputting normally, it still has the torque to drive the clutch shaft body 14. In the case of motor stall, to avoid motor burnout due to prolonged stall, the concave-convex ring 13 on the worm gear body 12 and the concave-convex block 15 on the clutch shaft body 14 cooperate with each other. Both the concave-convex ring 13 and the concave-convex block 15 have a certain slope. The different step heights and angles of the concave-convex ring 13 and the concave-convex block 15 affect the magnitude of the working torque. When the clutch shaft body 14 is locked by external force, the worm gear body 12 can overcome the disc spring. The reaction force 6 forces the clutch shaft body 14 to a certain height, changing the original interlocking contact between the worm gear body 12 and the clutch shaft body 14 from a convex-convex contact to a convex-convex contact. At this time, the worm gear body 12 can continue to rotate until the next interlocking contact between the concave-convex ring 13 and the concave-convex block 15, and then repeat the above steps. The above is the entire operation process of the clutch mechanism. When the device is in use, the external force drives the output shaft body 18, which indirectly drives the worm gear body 12. The worm gear body 12 is equipped with helical gears and interlocking teeth on its exterior. The reverse drive efficiency is low and there is a self-locking effect. The external force may far exceed the forward drive output torque, which will cause damage to the transmission chain. The clutch mechanism 1 can play a protective role in this scenario, causing the clutch shaft mechanism 5 and the worm gear mechanism 4 to produce a "slippage" phenomenon, cutting off the transmission chain, thereby playing a protective role. The setting of the disc spring 6 reverse drive force is the key factor for the upper limit of the forward drive capability of the entire device, and also the key factor for the upper limit of reverse slippage.

[0030] Please see Figures 1-4 The slide mechanism 3 includes a slide body 9, a first protrusion 10 and a positioning groove 11. Multiple sets of first protrusions 10 are fixedly connected to the top of the slide body 9. A positioning groove 11 is formed between two adjacent sets of first protrusions 10. The second protrusion 19 is inserted into the positioning groove 11.

[0031] The clutch mechanism 1 is equipped with a slide mechanism 3, which is in direct contact with the output shaft mechanism 2 and is relatively fixed. When the parts are not working, the positioning groove 11 between the first protrusions 10 on the slide body 9 and the second protrusion 19 on the output shaft body 18 are in contact. At this time, the contact area is relatively large. When the clutch mechanism 1 and the output shaft mechanism 2 are operating normally, the second protrusion 19 on the output shaft body 18 contacts the first protrusion 10 on the slide body 9, thereby reducing the contact area and reducing friction between the parts during rotation to a certain extent, thus reducing wear.

[0032] Please see Figure 3 The cover mechanism 8 and the clutch shaft mechanism 5 are both made of plastic material. The plastic material used in the cover mechanism 8 and the clutch shaft mechanism 5 reduces the cost of the entire device to some extent.

[0033] In use, firstly, the second boss 19 on the output shaft body 18 can be axially fixed to the worm gear body 12 through a keyway. The claw 17 on the cover body 16 can be engaged with the worm gear body 12. Between the worm gear body 12 and the cover body 16, a clutch shaft structure 5, a clutch washer 7, a disc spring 6, and a clutch washer 7 are arranged in sequence. This arrangement prevents the output shaft body 18 from rotating normally when blocked by external force. When the worm gear body 12 is outputting normally, the worm gear body 12 still has the torque to drive the clutch shaft body 14. In the case of motor stall, to avoid motor burnout due to prolonged stall, the worm gear body 12 has a locking mechanism. The concave-convex ring 13 and the concave-convex block 15 on the clutch shaft body 14 engage with each other, and both the concave-convex ring 13 and the concave-convex block 15 have a certain slope. The different step heights and angles of the concave-convex ring 13 and the concave-convex block 15 affect the magnitude of the working torque. When the clutch shaft body 14 is blocked and locked by an external force, the worm gear body 12 can overcome the reaction force of the disc spring 6 and forcibly press the clutch shaft body 14 away from a certain height, so that the original concave-convex engagement between the worm gear body 12 and the clutch shaft body 14 becomes a convex-convex contact. At this time, the worm gear body 12 can continue to rotate until the concave-convex ring 13 and the concave-convex block 15 engage again. Repeating the above steps, the entire operation of the clutch mechanism is described above. During operation, external force drives the output shaft body 18, indirectly driving the worm gear body 12. The worm gear body 12 has helical gears and interlocking teeth on its exterior, resulting in low reverse drive efficiency and a self-locking effect. External force may far exceed the forward drive output torque, potentially damaging the transmission chain. The clutch mechanism 1 acts as a protector in this scenario, causing a "slippage" phenomenon between the clutch shaft mechanism 5 and the worm gear mechanism 4, thus cutting off the transmission chain and providing protection. The reverse drive force of the disc spring 6 is the key factor limiting the forward drive capability of the entire device. This is also a key factor in the upper limit of reverse slippage. The clutch mechanism 1 is equipped with a slide mechanism 3, which is in direct contact with the output shaft mechanism 2 and is relatively fixed. When the parts are not working, the positioning groove 11 between the first protrusions 10 on the slide body 9 and the second protrusion 19 on the output shaft body 18 are in contact. At this time, the contact area is relatively large. When the clutch mechanism 1 and the output shaft mechanism 2 are operating normally, the second protrusion 19 on the output shaft body 18 contacts the first protrusion 10 on the slide body 9, thereby reducing the contact area and reducing friction between the parts during rotation to a certain extent, thus reducing wear.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clutch lifting device, comprising a clutch mechanism (1), an output shaft mechanism (2), and a slide mechanism (3), characterized in that: The output shaft mechanism (2) is inserted into the clutch mechanism (1). The clutch mechanism (1) is provided with a slide mechanism (3). The clutch mechanism (1) includes a worm gear mechanism (4), a clutch shaft mechanism (5), a disc spring (6), a clutch washer (7), and a cover mechanism (8). The cover mechanism (8) is attached to the bottom of the worm gear mechanism (4). The output shaft mechanism (2) is inserted into the worm gear mechanism (4). The clutch shaft mechanism (5) is provided inside the worm gear mechanism (4). Two sets of clutch washers (7) are provided inside the worm gear mechanism (4) and outside the output shaft mechanism (2). Multiple sets of disc springs (6) are provided between the two sets of clutch washers (7) and outside the output shaft mechanism (2).

2. The clutch lifting device according to claim 1, characterized in that: The worm gear mechanism (4) includes a worm body (12) and a concave-convex ring (13). The concave-convex ring (13) is fixedly installed inside the worm body (12). The cover mechanism (8) includes a cover body (16) and a pawl (17). Multiple sets of pawls (17) that are fixedly connected to the cover body (16) and inserted into the worm gear mechanism (4) are fixedly connected to it.

3. The clutch lifting device according to claim 2, characterized in that: The clutch shaft mechanism (5) includes a clutch shaft body (14) and a bump block (15). The clutch shaft body (14) is located inside the worm gear body (12). The bump block (15) is fixedly installed on the top of the clutch shaft body (14) and at the recessed position corresponding to the bump ring (13).

4. A clutch lifting device according to claim 3, characterized in that: The output shaft mechanism (2) includes an output shaft body (18) and a second boss (19). The output shaft body (18) is inserted into the worm gear body (12), and multiple sets of second bosses (19) are fixedly connected to the outer wall of the output shaft body (18).

5. A clutch lifting device according to claim 4, characterized in that: The slide mechanism (3) includes a slide body (9), a first boss (10) and a positioning groove (11). The top of the slide body (9) is fixedly connected to multiple sets of first bosses (10), and a positioning groove (11) is formed between two adjacent sets of first bosses (10). The second boss (19) is inserted into the positioning groove (11).

6. A clutch lifting device according to claim 5, characterized in that: Both the cover mechanism (8) and the clutch shaft mechanism (5) are made of plastic.

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