Conveniently overhauled one-way torque limiter

Abstract

The utility model relates to the field of torsion limiter, especially one -way torsion limiter convenient to overhaul. Including driving shaft, driving shaft cover is equipped with copper ring, tablet, disc spring, fixed sheet, copper ring cover is equipped with first friction piece, sprocket and second friction piece, and sprocket both ends are respectively with first friction piece and second friction piece mutually cooperate, and tablet and second friction piece mutually cooperate, and disc spring and tablet are engaged, and fixed sheet and disc spring mutually cooperate, and driving shaft is connected with end cover, and end cover is connected with bolt, and bolt and fixed sheet resist, and driving shaft is connected with ratchet wheel, and sprocket rotatably connects with stand, and stand is connected with pawl, and sprocket detachably connects with vertical plate, and vertical plate is connected with spring no.

Description

Technical Field

[0001] This utility model relates to the field of torque limiters, and in particular to a one-way torque limiter that is easy to maintain. Background Technology

[0002] As a key protective component in mechanical transmission systems, one-way torque limiters are widely used in conveyor belts, printing presses, agricultural machinery, gearboxes, and other applications. Their core function is to cut off torque transmission by friction slippage when the load torque exceeds a preset value during torque transmission in a preset direction, thus preventing damage to the power source and load components due to overload. At the same time, they limit reverse torque transmission to prevent equipment reversal and safety accidents.

[0003] When a traditional torque limiter transmits torque in both directions, if the load experiences a reverse impact, the reverse torque will be directly transmitted to the power source components such as the motor and reducer through the torque limiter. Utility Model Content

[0004] The present invention aims to provide a one-way torque limiter that is easy to maintain, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A convenient unidirectional torque limiter includes a drive shaft. The drive shaft is fitted with a copper ring, a pressure plate, a disc spring, and a fixing plate. The copper ring is fitted with a first friction plate, a sprocket, and a second friction plate. Both ends of the sprocket engage with the first and second friction plates respectively. The pressure plate engages with the second friction plate. The disc spring engages with the pressure plate. The fixing plate engages with the disc spring. The drive shaft is threadedly connected to an end cap, which is threadedly connected to a bolt. The bolt abuts against the fixing plate. The drive shaft is connected to a ratchet. The sprocket is rotatably connected to a column, which is threadedly connected to a pawl. The sprocket is detachably connected to a vertical plate, which is connected to a spring. The other end of the spring is connected to the pawl, which engages with the ratchet.

[0007] Preferably, the sprocket has a sliding groove, a pin is slidably connected to the side wall of the sliding groove, the upright plate has a insertion hole, the pin and the insertion hole cooperate with each other, the pin is connected to a second spring, and the other end of the second spring is connected to the side wall of the sliding groove.

[0008] Preferably, the end of the pin is arc-shaped.

[0009] Preferably, the teeth of the sprocket are surface hardened.

[0010] Preferably, the sprocket teeth are coated with a wear-resistant coating.

[0011] Preferably, the threads of the bolt are coated with thread-locking adhesive.

[0012] Preferably, a lubricating bushing is provided at the hinge point connecting the pawl and the column.

[0013] Preferably, the end of the pawl that engages with the ratchet is inlaid with a wear-resistant alloy block.

[0014] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0015] (1) This solution achieves unidirectional torque transmission by setting up a ratchet, pawl, and spring structure. The ratchet rotates synchronously with the drive shaft, and the pawl is always in contact with the ratchet tooth surface by the preload of the spring. When the drive shaft rotates in the preset direction, it ensures that the torque is stably transmitted to the load end. When the drive shaft rotates in the opposite direction, the ratchet tooth surface pushes the pawl, the pawl is stuck in the tooth groove, the sprocket stops rotating, and the reverse torque transmission is completely cut off. This unidirectional limit function can effectively avoid the risk of equipment reversal and significantly improve the safety of equipment operation. At the same time, it prevents the reverse torque from being transmitted to the power source through the drive shaft, effectively protecting core components such as motors and reducers, reducing the equipment damage rate caused by reverse impact, and solving the shortcomings of traditional torque limiters that cannot resist reverse load impact.

[0016] (2) By setting up structures such as sliding grooves, pins, springs, and sockets, during assembly, the pins automatically embed into the sockets of the upright plate under the elastic force of springs, thus completing the positioning of the upright plate. During maintenance, simply press the pins into the sliding grooves to release the engagement between the pins and the sockets, and directly remove the upright plate to maintain springs or pawls without the need for tools, greatly shortening the disassembly time and significantly improving the maintenance efficiency of the pawl assembly. On the other hand, the elastic force of springs ensures that the pins are always tightly engaged with the sockets, preventing the pins from falling off due to equipment vibration, ensuring the stability of the connection between the upright plate and the sprocket. At the same time, springs are hidden in the sliding grooves, making them less susceptible to dust contamination and extending their service life.

[0017] (3) By setting the end arc-shaped pin, the fitting resistance between the pin and the vertical plate socket can be significantly reduced, and the rigid collision between the right-angle edge of the pin and the socket can be avoided, thus reducing the wear of both.

[0018] (4) By setting the sprocket teeth with surface hardening treatment, the surface hardness and wear resistance of the sprocket teeth can be significantly improved, the wear resistance of the teeth can be greatly improved, and the tooth surface wear and tooth tip collapse can be avoided prematurely, thus extending the service life of the sprocket. At the same time, hardening treatment can enhance the fatigue strength of the teeth, reduce tooth cracks caused by high frequency meshing, ensure stable torque transmission of the sprocket in heavy load scenarios, and reduce the risk of equipment downtime due to sprocket failure.

[0019] (5) By setting a pawl with an embedded wear-resistant alloy block, the wear-resistant alloy block is embedded at the end of the pawl. The alloy block has higher hardness and stronger wear resistance, and can withstand meshing impact and friction, which greatly improves the service life of the pawl end. At the same time, the embedded connection between the alloy block and the pawl is firm and not easy to fall off, ensuring the meshing accuracy between the pawl and the ratchet, and avoiding meshing noise and one-way torque interruption caused by end wear. In addition, the alloy block can be repaired by welding after wear, which extends the overall service life of the pawl and reduces the need for spare parts replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a top view of the present invention;

[0022] Figure 3 This is a front sectional view of the present invention;

[0023] Figure 4 A front sectional view of the sliding groove provided by this utility model;

[0024] Reference numerals: 1. Ratchet, 2. Stand plate, 3. Sprocket, 4. Second friction plate, 5. Pressure plate, 6. Fixing plate, 7. End cap, 8. Bolt, 9. Column, 10. Spring 1, 11. Pawl, 12. Drive shaft, 13. First friction plate, 14. Disc spring, 15. Copper ring, 16. Insertion hole, 17. Spring 2, 18. Sliding groove, 19. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0026] like Figure 1-4The diagram illustrates a convenient unidirectional torque limiter, comprising a drive shaft 12. The drive shaft 12 is fitted with a copper ring 15, a pressure plate 5, a disc spring 14, and a fixing plate 6. The copper ring 15 houses a first friction plate 13, a sprocket 3, and a second friction plate 4. The copper ring 15 positions the first friction plate 13, the sprocket 3, and the second friction plate 4. The copper ring 15 has excellent thermal conductivity, quickly dissipating the heat generated during friction plate operation and preventing localized overheating that could lead to a decrease in the coefficient of friction. The sprocket 3 engages with the first friction plate 13 and the second friction plate 4 at both ends. The friction plates are machined with a diamond pattern to increase friction with the sprocket 3, ensuring stable torque transmission. Furthermore, the friction plates are independent components and can be replaced individually after wear, without requiring replacement of the copper ring 15 or the sprocket 3. The pressure plate 5 engages with the second friction plate 4, and the disc spring 14 engages with the pressure plate 5, ensuring that the pressure from the disc spring 14 is evenly transmitted to the pressure plate 5. The fixed plate 6 and the disc spring 14 cooperate with each other. The drive shaft 12 is threadedly connected to the end cover 7, and the end cover 7 is threadedly connected to the bolt 8. The bolt 8 abuts against the fixed plate 6, which can adjust the compression of the disc spring 14 by the fixed plate 6, thereby changing the pressure of the disc spring 14 on the pressure plate 5, and finally adjusting the friction between the friction plate and the sprocket 3. The adjustment range can be set according to the equipment requirements. The drive shaft 12 is connected to the ratchet 1, which has an asymmetrical sawtooth tooth shape. The sprocket 3 is rotatably connected to the column 9, which is threadedly connected to the pawl 11. During assembly, only the pawl 11 needs to be rotated to complete the fixation, without the need for a pin. It can be quickly disassembled during maintenance. The sprocket 3 is detachably connected to the upright plate 2, which is connected to the spring 10. The other end of the spring 10 is connected to the pawl 11. The preload of the spring 10 ensures that the pawl 11 is always in contact with the tooth surface of the ratchet 1, and the pawl 11 and the ratchet 1 cooperate with each other.

[0027] like Figure 4 As shown, the sprocket 3 has two sliding grooves 19 corresponding to the upright plate 2. Pins 17 are slidably connected to the side walls of the two sliding grooves 19. The upright plate 2 has insertion holes 16 at both ends. The two pins 17 engage with their corresponding insertion holes 16. Each pin 17 is connected to a second spring 18, and the other end of each second spring 18 is connected to the side wall of its corresponding sliding groove 19. The ends of both pins 17 are arc-shaped. During assembly, the pins 17 automatically engage with the insertion holes 16 under the elastic force of the second spring 18, thus fixing the upright plate 2 to the sprocket 3. During maintenance, simply press the pins 17 into the sliding grooves 19 to compress the second spring 18, thus releasing the engagement between the pins 17 and the insertion holes 16. The upright plate 2 can then be directly removed to maintain the first spring 10 or the pawl 11, all without the need for tools.

[0028] like Figure 1 As shown, the teeth of sprocket 3 have undergone surface hardening treatment. The surface of the sprocket teeth of sprocket 3 is coated with a wear-resistant coating. The threads of bolt 8 are coated with thread-locking adhesive. A lubrication bushing is provided at the hinge point connecting pawl 11 and column 9.

[0029] like Figure 2 As shown, the end of the pawl 11 that engages with the ratchet 1 is inlaid with a wear-resistant alloy block. The alloy block contacts the tooth surface of the ratchet 1 to improve wear resistance.

[0030] The specific implementation process is as follows:

[0031] When the power source drives the drive shaft 12 to rotate clockwise, the teeth of the ratchet 1 push the pawl 11 to compress the spring 10, and the pawl 11 disengages from the ratchet 1, thus not obstructing the rotation of the sprocket 3. When the drive shaft 12 rotates counterclockwise, the pawl 11 engages the ratchet 1, the sprocket 3 stops rotating, cuts off the reverse torque, and prevents the load from reversing.

[0032] When the load torque exceeds the preset value, the static friction between the friction plate and the sprocket 3 is broken and turns into sliding friction. The drive shaft 12 drives the ratchet 1 and the friction plate to continue rotating. The sprocket 3 stops rotating due to the load resistance, cutting off the torque transmission. During the sliding process, the copper ring 15 quickly conducts heat to prevent the friction coefficient from dropping sharply. The pawl 11 intermittently meshes with the ratchet 1 to buffer the impact. At the same time, a warning noise is generated to remind troubleshooting. After the load fault is eliminated, the friction plate and the sprocket 3 resume static friction and automatically resume normal torque transmission.

[0033] Press the pin 17 in the sliding groove 19 of the sprocket 3 to release the fixing of the upright plate 2. After removing the upright plate 2, unscrew the pawl 11 to clean or replace the parts. Loosen the bolt 8 of the end cover 7, remove the fixing plate 6, disc spring 14, and pressure plate 5, and directly pull out the friction plate for replacement. After resetting, adjust the compression of the disc spring 14. There is no need to separate the drive shaft 12 from the external equipment.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A one-way torque limiter that is easy to maintain, characterized in that: The system includes a drive shaft (12), on which a copper ring (15), a pressure plate (5), a disc spring (14), and a fixing plate (6) are fitted. The copper ring (15) is fitted with a first friction plate (13), a sprocket (3), and a second friction plate (4). The two ends of the sprocket (3) respectively cooperate with the first friction plate (13) and the second friction plate (4). The pressure plate (5) cooperates with the second friction plate (4). The disc spring (14) engages with the pressure plate (5). The fixing plate (6) cooperates with the disc spring (14). The drive shaft... (12) A threaded end cap (7) is connected to the end cap (7), and a bolt (8) is threaded to the end cap (7). The bolt (8) abuts against the fixing plate (6). A ratchet (1) is connected to the drive shaft (12). A column (9) is rotatably connected to the sprocket (3). A pawl (11) is threaded to the column (9). A plate (2) is detachably connected to the sprocket (3). A spring (10) is connected to the plate (2). The other end of the spring (10) is connected to the pawl (11). The pawl (11) and the ratchet (1) cooperate with each other.

2. The easy-to-maintain unidirectional torque limiter as described in claim 1, characterized in that: The sprocket (3) has a sliding groove (19), and a pin (17) is slidably connected to the side wall of the sliding groove (19). The upright plate (2) has a socket (16), and the pin (17) and the socket (16) cooperate with each other. The pin (17) is connected to a second spring (18), and the other end of the second spring (18) is connected to the side wall of the sliding groove (19).

3. A unidirectional torque limiter that is easy to maintain as described in claim 2, characterized in that: The end of the pin (17) is arc-shaped.

4. A unidirectional torque limiter that is easy to maintain as described in claim 1, characterized in that: The teeth of the sprocket (3) are surface hardened.

5. A unidirectional torque limiter that is easy to maintain as described in claim 1, characterized in that: The teeth of the sprocket (3) are coated with a wear-resistant coating.

6. A convenient unidirectional torque limiter as described in claim 1, characterized in that: The threads of the bolt (8) are coated with thread-locking adhesive.

7. A convenient unidirectional torque limiter as described in claim 1, characterized in that: A lubricating bushing is provided at the connection hinge point between the pawl (11) and the column (9).

8. A convenient unidirectional torque limiter as described in claim 1, characterized in that: The end of the pawl (11) that engages with the ratchet (1) is inlaid with a wear-resistant alloy block.

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