A gear coupling with torque transmission safety

Abstract

This utility model relates to the field of coupling technology, specifically a torque transmission safety gear coupling. The utility model includes a first coupling and a second coupling; a four-jaw key is fixedly connected to the side wall of the first coupling, and a keyway is formed on the side wall of the second coupling near the first coupling, the keyway engaging with the four-jaw key; by fixing the four-jaw key to the side wall of the first coupling and forming a keyway on the side wall of the second coupling, the torque of the motor drive is distributed between the teeth and the key after the first and second couplings are installed on the equipment. This reduces the impact force on the teeth during equipment operation, ensuring the service life of both couplings; even in the event of tooth breakage, the protective four-jaw key can temporarily transmit torque, ensuring the load can be safely lowered to the ground and preventing serious accidents.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to a gear coupling with torque transmission safety. Background Technology

[0002] The overhead crane in the workshop is driven by a combination of a motor and a reducer. The motor and reducer are connected by a gear coupling. Because the motor rotates at high speed and the reducer reduces speed to increase torque, the gear coupling responsible for transmitting rotation is subjected to a very large torque. Moreover, the operation of the overhead crane requires frequent acceleration, deceleration and steering movements.

[0003] Chinese patent CN106838034B discloses a coupling for a horizontal shaft tidal current generator with overload protection. The coupling includes an input flange, a transmission flange, a transmission shaft, a splined sleeve, a first sealing sleeve, a second sealing sleeve, an elastic component, an insulating flange, and an output flange. An overload protection device is provided between the output flange and the insulating flange. In this coupling, a certain installation angle is allowed between the output shaft of the gearbox and the transmission shaft of the coupling, sufficient to compensate for radial and angular displacements caused by vibration and impact. A lubrication cavity is formed at the spline engagement point to provide long-term lubrication for the spline engagement part and prevent wear. The elastic component effectively prevents axial movement of the splined sleeve, avoiding uneven wear at the spline engagement point. The insulating shaft prevents parasitic current from flowing from the generator end to the gearbox. When the torque generated by the system is too large, the overload protection device between the insulating flange and the output flange interrupts torque transmission, thus protecting the generator set.

[0004] In current technology, the contact tooth surface of the gear coupling, which transmits torque, is subjected to a very large impact force at the moment the equipment starts up; coupled with wear and tear over a long period of use, the tooth root of the gear coupling may break, and the coupling with broken tooth roots cannot transmit torque.

[0005] Therefore, a gear coupling with torque transmission safety is proposed to address the above problems. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the defect in the prior art where the tooth root of the gear coupling breaks and cannot transmit torque.

[0007] To solve the above-mentioned technical problems, this utility model provides a gear coupling with torque transmission safety.

[0008] In one embodiment of this utility model, a first coupling and a second coupling are included; a four-jaw key is fixedly connected to the side wall of the first coupling, and a keyway is formed on the side wall of the second coupling near the first coupling, the keyway engaging with the four-jaw key; an external gear disc is fixedly connected to the outer wall of both the first and second couplings; a retaining sleeve is fitted onto the outer wall of both the first and second couplings, and an internal gear disc is fixedly connected to the inner wall of each retaining sleeve, the internal gear disc meshing with the external gear disc; the two retaining sleeves are connected by a plurality of first fixing bolts.

[0009] In one embodiment of the present invention, the first coupling and the second coupling are provided with two outer shells on their outer walls, and multiple fixing plates are fixedly connected to the outer walls of each outer shell. Adjacent fixing plates are connected by a second fixing bolt.

[0010] In one embodiment of this utility model, a plurality of water-absorbing grooves are provided on the inner wall of the outer shell, and each water-absorbing groove is filled with water-absorbing silicone; the two outer shells are connected by a sealing strip.

[0011] In one embodiment of the present invention, an oil injection pipe is fixedly connected to one of the ferrules, one end of the oil injection pipe extends between the ferrule and the first coupling, and the other end of the oil injection pipe is provided with an oil injection mechanism.

[0012] In one embodiment of the present invention, the oil filling mechanism includes an oil tank fixedly attached to the outer wall of the outer shell, an electric push rod fixedly attached to the outer wall of the oil tank, the output end of the electric push rod extending to the inner wall of the oil tank and fixedly attached to a conical block, the conical block being inserted into one end of the oil filling pipe; a refueling pipe is connected and fixedly attached to one side of the oil tank, and a plug is inserted into one end of the refueling pipe.

[0013] In one embodiment of this utility model, a vibration sensor is fixedly attached to the outer wall of the sleeve, and the vibration sensor is electrically connected to the electric push rod.

[0014] In one embodiment of this utility model, a plurality of thermocouples are also fixedly connected to the side wall of the sleeve, and all thermocouples are electrically connected to the electric push rod.

[0015] In one embodiment of this utility model, sealing rings are embedded in the inner wall of the outer shell, and the sealing rings are tightly fitted with the first coupling and the second coupling respectively.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0017] This utility model discloses a torque transmission safety gear coupling. By setting a four-jaw key and a keyway, the four-jaw key is fixed to the side wall of the first coupling, and the keyway is opened on the side wall of the second coupling. The keyway and the four-jaw key are interlocked. In this way, after the first and second couplings are installed on the equipment, the torque of the motor drive is distributed between the teeth and the key. The impact force on the teeth during equipment operation is reduced, which protects and extends the service life of the first and second couplings. At the same time, even if the teeth break, the protective four-jaw key can temporarily transmit torque, ensuring that the suspended load can be smoothly lowered to the ground and avoiding serious accidents.

[0018] This utility model discloses a gear coupling with torque transmission safety. By incorporating a vibration sensor, abnormal vibration, potentially indicating wear on the gear disc, is transmitted to the system. The system then controls an electric actuator to open and initiate lubrication, reducing wear. When lubrication is required, the electric actuator moves a conical block away from the lubrication pipe, allowing lubricating oil from the oil tank to be injected through the lubrication pipe. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention;

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

[0022] Figure 3 This is a perspective view of the first coupling in this utility model;

[0023] Figure 4 This is a perspective view of the keyway in this utility model;

[0024] Figure 5 This is a perspective view of the card holder in this utility model;

[0025] Figure 6 This is a cross-sectional view of the fuel tank in this utility model;

[0026] Figure 7 This is an enlarged view of point A in this utility model;

[0027] Figure 8 This is a perspective view of the outer shell of this utility model;

[0028] Explanation of reference numerals in the accompanying drawings: 1. First coupling; 11. Second coupling; 12. Compression sleeve; 13. Four-jaw key; 14. Keyway; 15. First fixing bolt; 16. Vibration sensor; 17. Thermocouple; 2. Housing; 21. Fixing plate; 22. Second fixing bolt; 23. Sealing ring; 24. Water suction tank; 25. Oil filling pipe; 26. Oil tank; 261. Electric push rod; 262. Conical block; 263. Oil filling pipe; 264. Plug; 27. Sealing strip. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0030] Reference Figures 1-8 As shown, this utility model discloses a torque transmission safety gear coupling, comprising a first coupling 1 and a second coupling 11; a four-jaw key 13 is fixedly connected to the side wall of the first coupling 1, and a keyway 14 is formed on the side wall of the second coupling 11 near the first coupling 1, the keyway 14 engaging with the four-jaw key 13; external gear discs are fixedly connected to the outer walls of both the first coupling 1 and the second coupling 11; a retaining sleeve 12 is fitted onto the outer walls of both the first coupling 1 and the second coupling 11, and an internal gear disc is fixedly connected to the inner wall of each retaining sleeve 12, the internal gear disc meshing with the external gear disc; the two retaining sleeves 12 are connected by a plurality of first fixing bolts 15.

[0031] The overhead crane in the workshop is driven by a combination of a motor and a reducer. The motor and reducer are connected by a gear coupling. Because the motor rotates at high speed and the reducer reduces speed to increase torque, the gear coupling responsible for transmitting rotation is subjected to a very large torque. Moreover, the operation of the overhead crane requires frequent acceleration, deceleration and steering movements. During operation, torque transmission occurs through the meshing of the outer gear discs of the first coupling 1 and the second coupling 11 with the inner gear discs of the ferrule 12. Therefore, all forces in the gear coupling are concentrated on the teeth. To prevent the instantaneous loss of torque transmission function in case of tooth breakage, a torque safety feature is added to ensure continued torque transmission even in the event of tooth breakage. Therefore, a four-jaw key 13 is fixed to the side wall of the first coupling 1, and a keyway 14 is provided on the side wall of the second coupling 11. The keyway 14 engages with the four-jaw key 13. Thus, after the first coupling 1 and the second coupling 11 are installed on the equipment, the torque of the motor drive is distributed between the teeth and the keyway, reducing the impact force on the teeth during equipment operation and ensuring and extending the service life of the first coupling 1 and the second coupling 11. Furthermore, even in the event of tooth breakage, the protective four-jaw key 13 can temporarily transmit torque, ensuring that the suspended load can be smoothly lowered to the ground and preventing serious accidents.

[0032] Furthermore, such as Figure 1 As shown, the first coupling 1 and the second coupling 11 are provided with two outer shells 2 on their outer walls. Multiple fixing plates 21 are fixedly connected to the outer walls of the outer shells 2. The two adjacent fixing plates 21 are connected by a second fixing bolt 22.

[0033] During operation, the outer casing 2 is used to protect the ferrule 12, the first coupling 1 and the second coupling 11, and the first fixing bolt 15 to prevent rusting, which could cause the connection between the two ferrules 12 to break and prevent torque transmission. The outer casing 2 is fixed to the outside of the first coupling 1 and the second coupling 11 by the second fixing bolt 22, forming a sealed protective space.

[0034] Furthermore, such as Figure 6 and Figure 8 As shown, multiple water-absorbing grooves 24 are provided on the inner wall of the outer shell 2, and each water-absorbing groove 24 is filled with water-absorbing silicone; the two outer shells 2 are connected by a sealing strip 27.

[0035] During operation, multiple water-absorbing grooves 24 are opened on the inner wall of the outer casing 2, and water-absorbing silicone is filled in the water-absorbing grooves 24 to facilitate the absorption of water seepage and reduce water seepage and rusting of the internal components of the outer casing 2; the sealing strip 27 strengthens the sealing of the inside of the outer casing 2.

[0036] Furthermore, such as Figure 6 and Figure 7 As shown, one of the ferrules 12 is connected to an oil injection pipe 25. One end of the oil injection pipe 25 extends between the ferrule 12 and the first coupling 1, and the other end of the oil injection pipe 25 is provided with an oil injection mechanism.

[0037] During operation, after the outer and inner gear discs mesh and rotate for a period of time, wear may occur. Oil is injected through the oil injection pipe 25 to lubricate the gear disc between the ferrule 12 and the coupling, thereby reducing wear.

[0038] Furthermore, such as Figure 1 and Figure 7 As shown, the oil filling mechanism includes an oil tank 26 fixed to the outer wall of the outer casing 2. An electric push rod 261 is fixed to the outer wall of the oil tank 26. The output end of the electric push rod 261 extends to the inner wall of the oil tank 26 and is fixed to a conical block 262. The conical block 262 is inserted into one end of the oil filling pipe 25. A refueling pipe 263 is connected and fixed to one side of the oil tank 26. A plug 264 is inserted into one end of the refueling pipe 263.

[0039] During operation, by setting up an oil injection mechanism, when oil injection is required, the electric push rod 261 drives the conical block 262 to move away from the oil injection pipe 25, and the lubricating oil in the oil tank 26 is injected through the oil injection pipe 25 for lubrication. In addition, when the lubricating oil in the oil tank 26 needs to be added, the plug 264 is opened and the oil can be added through the oil filling pipe 263.

[0040] Furthermore, such as Figure 5 As shown, vibration sensors 16 are fixedly attached to the outer wall of the sleeve 12, and the vibration sensors 16 are electrically connected to the electric push rod 261.

[0041] During operation, by setting up vibration sensor 16, if the vibration of vibration sensor 16 is abnormal, it may be due to wear on the gear plate. The signal will be transmitted to the system, which will control the electric push rod 261 to open and then inject oil to reduce wear through lubrication.

[0042] Furthermore, such as Figure 5 As shown, multiple thermocouples 17 are also fixedly connected to the side wall of the sleeve 12, and all thermocouples 17 are electrically connected to the electric push rod 261.

[0043] During operation, thermocouple 17 is used to monitor the temperature of the ferrule 12 surface. If the temperature of the ferrule 12 is higher than the set value, the signal will be transmitted to the system, and the system will control the electric push rod 261 to open and then inject oil to cool it down. If the cooling effect is not obvious, it is necessary to stop the operation or start the external cooling equipment.

[0044] Furthermore, such as Figure 6 As shown, sealing rings 23 are embedded in the inner wall of the outer shell 2, and the sealing rings 23 are tightly fitted to the first coupling 1 and the second coupling 11 respectively.

[0045] During operation, a sealing ring 23 is provided to seal the connection between the outer casing 2 and the first coupling 1 and the second coupling 11, thereby reducing rainwater infiltration.

[0046] Working principle: During operation, torque transmission occurs through the meshing between the outer gear discs of the first coupling 1 and the second coupling 11 and the inner gear disc of the ferrule 12. Therefore, all forces in the gear coupling are concentrated on the teeth. To prevent the instantaneous loss of torque transmission function in case of tooth breakage, a torque safety feature is added to ensure continued torque transmission even in the event of tooth breakage. Therefore, a four-jaw key 13 is fixed to the side wall of the first coupling 1, and a keyway 14 is provided on the side wall of the second coupling 11. The keyway 14 engages with the four-jaw key 13. Thus, after the first coupling 1 and the second coupling 11 are installed on the equipment, the torque of the motor drive is distributed between the teeth and the keyway, reducing the impact force on the teeth during equipment operation and ensuring and extending the service life of the first coupling 1 and the second coupling 11. Furthermore, even in the event of tooth breakage, the protective four-jaw key 13 can temporarily transmit torque, ensuring that the suspended load can be smoothly lowered to the ground and preventing serious accidents.

[0047] The outer casing 2 protects the ferrule 12, the first coupling 1, and the second coupling 11, as well as the first fixing bolt 15, preventing rust and potential breakage of the connection between the two ferrules 12, thus hindering torque transmission. The outer casing 2 is secured to the outside of the first coupling 1 and the second coupling 11 by the second fixing bolt 22, forming a sealed protective space. Multiple water-absorbing grooves 24 are formed on the inner wall of the outer casing 2, filled with absorbent silica gel to absorb any seeping water, reducing the risk of water seepage and rusting of the internal components. A sealing strip 27 further reinforces the internal airtightness of the outer casing 2.

[0048] By setting up a vibration sensor 16, if abnormal vibration is detected by the sensor, possibly indicating wear on the gear disc, a signal will be transmitted to the system. The system will then control the electric push rod 261 to open and initiate lubrication, reducing wear through lubrication. When lubrication is needed, the electric push rod 261 drives the conical block 262 to move away from the lubrication pipe 25, allowing lubricating oil from the oil tank 26 to be injected through the lubrication pipe 25. Additionally, when the lubricating oil in the oil tank 26 needs to be added, the plug 264 will be opened, and the oil tank 26 can be replenished through the filling pipe 263.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A torque transmitting safety gear coupling comprising a first coupling (1) and a second coupling (11); characterized in that: A four-jaw key (13) is fixedly connected to the side wall of the first coupling (1), and a keyway (14) is provided on the side wall of the second coupling (11) near the first coupling (1). The keyway (14) is engaged with the four-jaw key (13). An external gear plate is fixedly connected to the outer wall of both the first coupling (1) and the second coupling (11). A sleeve (12) is fitted on the outer wall of both the first coupling (1) and the second coupling (11). An internal gear plate is fixedly connected to the inner wall of the sleeve (12). The internal gear plate meshes with the external gear plate. The two sleeves (12) are connected by a plurality of first fixing bolts (15).

2. A torque transmitting safety gear coupling according to claim 1, characterized in that: The first coupling (1) and the second coupling (11) are provided with two outer shells (2), and multiple fixing plates (21) are fixedly connected to the outer walls of the outer shells (2). The two adjacent fixing plates (21) are connected by a second fixing bolt (22).

3. A torque transmitting safety gear coupling according to claim 2, characterised in that: Multiple water-absorbing grooves (24) are provided on the inner wall of the outer shell (2), and each water-absorbing groove (24) is filled with water-absorbing silicone; the two outer shells (2) are connected by a sealing strip (27).

4. A torque transmitting overrunning clutch coupling according to claim 3, wherein: One of the ferrules (12) is connected to an oil injection pipe (25), one end of which extends between the ferrule (12) and the first coupling (1), and the other end of which is provided with an oil injection mechanism.

5. A torque transmitting overrunning clutch coupling according to claim 4, wherein: The oil filling mechanism includes an oil tank (26) fixed to the outer wall of the outer shell (2), an electric push rod (261) fixed to the outer wall of the oil tank (26), the output end of the electric push rod (261) extends to the inner wall of the oil tank (26) and is fixed to a conical block (262), the conical block (262) is inserted into one end of the oil filling pipe (25); a refueling pipe (263) is connected and fixed to one side of the oil tank (26), and a plug (264) is inserted into one end of the refueling pipe (263).

6. A torque transmitting overrunning clutch coupling according to claim 5, wherein: Vibration sensors (16) are fixed to the outer wall of each sleeve (12), and the vibration sensors (16) are electrically connected to the electric push rod (261).

7. A torque transmitting overrunning clutch coupling according to claim 6, wherein: Multiple thermocouples (17) are also fixed to the side wall of the sleeve (12), and the thermocouples (17) are all electrically connected to the electric push rod (261).

8. A torque transmitting overrunning clutch coupling according to claim 7, wherein: Sealing rings (23) are embedded in the inner wall of the outer shell (2), and the sealing rings (23) are tightly fitted to the first coupling (1) and the second coupling (11) respectively.

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