Belt anti-reversion transmission mechanism

Abstract

The utility model relates to the technical field of driving motor transmission, in particular to a belt anti-reversion transmission mechanism which effectively reduces reverse rotation caused by jamming or overload of a belt through cooperative work of a transmission shaft and a locking assembly, and reduces the risk of reverse torsion of a driving motor and damage to internal assemblies of the driving motor. The locking assembly comprises a locking block, a connecting seat and a locking column, the locking block is provided with a containing groove, the connecting seat is rotationally borne in the containing groove, the connecting seat is composed of a connecting part and an abutting part, the connecting seat, the transmission shaft and an output shaft of the gear are coaxially fixed, the locking block is provided with a receding opening, the locking column is arranged in the receding opening, and when the connecting seat rotates reversely to a certain angle, the locking column is locked in the receding opening. The abutting part is in contact with the locking column, impact energy caused by reverse rotation of part of the belt is reduced through friction, finally, the locking column abuts against the side wall of the receding opening, the reverse acceleration and the rotation speed of the gear set are limited, and the risk of reverse torsion of the driving motor is further reduced.

Description

Technical Field

[0001] This application relates to the field of drive motor transmission technology, and in particular to a belt anti-reverse transmission mechanism. Background Technology

[0002] As a basic component in industrial production, belts are used in a wide range of modern manufacturing scenarios, from mechanical transmission to electronic manufacturing.

[0003] In related technologies, a belt is fitted onto a pulley, and a drive motor transmits power to the pulley through a gear set. The output shaft of the gear set is coaxial with the pulley, thereby driving the belt to run.

[0004] However, this method has the following drawbacks: when the belt is jammed, overloaded, or suddenly stops, the reverse resistance of the belt will be directly transmitted to the output shaft of the gear set through the pulley, forcing the gear set to reverse. The gear set forces the motor to rotate in the opposite direction. Since the drive motor is usually designed for unidirectional drive, the internal components of the drive motor cannot withstand the impact of sudden reverse rotation, which can easily damage the internal structure of the drive motor. Utility Model Content

[0005] To address the aforementioned problems, this application provides a belt anti-reverse transmission mechanism.

[0006] The belt anti-reverse transmission mechanism provided in this application adopts the following technical solution:

[0007] A belt anti-reverse transmission mechanism includes a drive shaft and a locking assembly. The locking assembly includes a locking block and a connecting seat. The locking block is coaxially fixed to the output shaft of the gear set. The top of the locking block is provided with a receiving groove. The connecting seat is rotatably supported in the receiving groove. The connecting seat is coaxially fixed to the drive shaft. When the connecting seat rotates a certain angle relative to the locking block, the locking block limits the connection seat.

[0008] By adopting the above technical solution, when the belt is jammed, overloaded or suddenly stops, the reverse resistance of the belt will be directly transmitted to the drive shaft through the pulley to the connecting seat, and the connecting seat will rotate relative to the receiving groove. When the rotation angle exceeds a certain angle, the locking block restricts the further rotation of the connecting seat through radial constraint, further restricting the reverse rotation of the gear set and the reverse torsion of the drive motor, reducing the possibility of reverse torsion of the drive motor, and reducing the risk of damage to the internal components of the drive motor by reverse torsion.

[0009] Preferably, the locking assembly further includes a locking pin disposed on the locking block. The connecting seat includes a connecting portion and an abutting portion. The connecting portion is coaxially fixed with the transmission shaft. The abutting portion is disposed on the outer peripheral surface of the connecting portion. A portion of the locking pin extends into the receiving groove. When the connecting portion rotates relative to the locking block at a certain angle, the abutting portion abuts against the locking pin.

[0010] By adopting the above technical solution, when the belt causes reverse resistance to be transmitted to the connecting part through the drive shaft due to jamming, overload or sudden stop, the rotational movement of the connecting part causes the abutting part to gradually approach and contact the locking post. At this time, the contact between the abutting part and the locking post forms a buffer, which reduces some of the impact energy caused by the belt reversal through friction, thus buffering and reducing the risk of damage to the internal components of the drive motor caused by reverse torsion.

[0011] Preferably, the locking block is provided with a clearance opening, the clearance opening is connected to the receiving groove, and the locking pin is built into the clearance opening.

[0012] By adopting the above technical solution, the clearance port provides clearance and movement path for the locking pin. The clearance port is connected to the receiving groove, allowing the locking pin to abut against the abutment part. This achieves a gradual transition of the abutment part from a buffer state to a limiting state. After the connecting part rotates a certain angle relative to the locking block, the abutment part abuts against the locking pin. The abutment part pushes the locking pin until the locking pin abuts against the side wall of the clearance port. This reduces the instantaneous acceleration of the gear set being forced to reverse, limits the speed of the gear set rotating in reverse, further reduces the possibility of the drive motor reversing, and reduces the risk of damage to the internal components of the drive motor caused by reverse reversal.

[0013] Preferably, the side of the abutting part is provided with an arcuate surface, and the outer wall of the arcuate surface abuts against the inner wall of the receiving groove.

[0014] By adopting the above technical solution, the arc surface reduces the frictional resistance between the contact part and the receiving groove, reduces the feeling of jamming during rotation, and improves the stability during rotation.

[0015] Preferably, the bottom of the connecting part is provided with a relief groove, the output shaft of the gear set is interference-fitted with the locking block and passes through the bottom groove wall of the receiving groove, and the relief groove is provided for receiving the output shaft of the gear set.

[0016] By adopting the above technical solution, the locking block and the output shaft of the gear set are interference-fitted, and the output shaft part of the gear set passes through the upper surface of the receiving groove. The clearance groove provided at the bottom of the connecting part makes way for the part of the output shaft of the gear set that passes through the bottom wall of the receiving groove.

[0017] Preferably, it further includes a housing, which covers the outside of the locking assembly, the inner wall of the housing abuts against the outer wall of the locking post, and the top of the drive shaft penetrates through the top of the housing.

[0018] By adopting the above technical solution, the housing can limit the locking pin, reduce the locking pin from falling out of the clearance opening due to external force, and isolate the locking assembly from the outside, thus playing a protective role.

[0019] Preferably, the outer peripheral wall of the housing is further provided with a mounting part, which is fixedly connected to the equipment by bolts.

[0020] By adopting the above technical solution, the housing is fixedly connected to the equipment with bolts, which reduces the displacement of the housing due to vibration or external force during rotation and ensures that the positions of the locking block, connecting seat and locking pin are relatively stable.

[0021] Preferably, the connecting part, the abutting part, and the drive shaft are integrally formed.

[0022] By adopting the above technical solution, the structural strength and stability are improved by setting the connecting part, the abutting part and the transmission shaft as an integral molded structure.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The belt anti-reverse transmission mechanism is set by the coaxial cooperation of the locking block and the connecting seat. When the belt causes the transmission shaft to reverse, the angle limit in the receiving groove realizes mechanical locking, which reduces the possibility of the drive motor reversing and reduces the risk of damage to the internal components of the drive motor by the reverse impact.

[0025] 2. The contact friction between the locking pin and the abutment part forms a buffer, which reduces some of the impact energy brought by the reverse belt rotation through friction, thus buffering and reducing the risk of damage to the internal components of the drive motor caused by reverse torsion;

[0026] 3. By guiding the locking pin's movement path through the clearance port, the buffer contact gradually transitions to the limit position, effectively slowing down the reverse rotation speed of the gear set and reducing the risk of reverse torque of the drive motor. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the connection between the drive motor and the gear set in the equipment.

[0028] Figure 2 This is a schematic diagram of the installation of the drive shaft and locking assembly on the equipment.

[0029] Figure 3 This is a structural diagram of the drive shaft and locking assembly.

[0030] Figure 4 This is a structural diagram of the locking block and locking pin.

[0031] Figure 5 This is a structural diagram of the connecting seat and the drive shaft.

[0032] Figure 6 This is a schematic diagram of the structure of the housing covering the locking assembly.

[0033] Figure 7 This is a schematic diagram of the shell structure.

[0034] Explanation of reference numerals in the attached drawings: 1. Drive shaft; 2. Locking assembly; 21. Locking block; 211. Receiving groove; 212. Relief opening; 213. Fixing hole; 22. Connecting seat; 221. Connecting part; 222. Arc surface; 223. Abutting part; 224. Relief groove; 23. Locking pin; 3. Housing; 4. Mounting part; 41. Screw hole. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] This application discloses a belt anti-reverse transmission mechanism. (Refer to...) Figure 2 A belt anti-reverse transmission mechanism includes a drive shaft 1 and a locking assembly 2. One end of the drive shaft 1 is coaxially fixed to a pulley, and the other end of the drive shaft 1 is fixedly connected to the locking assembly 2. The locking assembly 2 is coaxially fixed to the output shaft of the gear set. When the belt is jammed, overloaded, or suddenly stops, the reverse resistance of the belt will be directly transmitted to the drive shaft 1 through the pulley. The locking assembly 2 will restrict the further rotation of the drive shaft 1, further restrict the reverse rotation of the gear set and the reverse torsion of the drive motor, reduce the possibility of reverse torsion of the drive motor, and reduce the risk of damage to the internal components of the drive motor by reverse torsion.

[0037] Reference Figure 3 Correspondingly, the locking assembly 2 includes a locking block 21, a connecting seat 22, and a locking pin 23. (Refer to...) Figure 4 Specifically, the locking block 21 has a ring-shaped geometric structure and is provided with a receiving groove 211. The receiving groove 211 is provided with a fixing hole 213. The structure of the fixing hole 213 matches the structure of the output shaft of the gear set. When the output shaft of the gear set is inserted into the fixing hole 213, the output shaft of the gear set and the locking block 21 are coaxially fixed. At the same time, the output shaft of the gear set and the fixing hole 213 are interference fit, thereby realizing the relative fixation between the output shaft of the gear set and the locking block 21.

[0038] Reference Figure 5Furthermore, the structure of the connecting seat 22 matches the internal structure of the receiving groove 211. The connecting seat 22 is rotatably supported in the receiving groove 211. The connecting seat 22 includes a connecting part 221 and an abutting part 223. The connecting part 221 has a cylindrical structure. The abutting part 223 is provided on the outer peripheral wall of the connecting part 221. The height of the abutting part 223 matches the height of the receiving groove 211. There are three abutting parts 223, which are evenly distributed on the outer peripheral wall of the connecting part 221. The side of the abutting part 223 is provided with an arc surface 222. When the connecting seat 22 is rotatably supported in the receiving groove 211, the outer wall of the arc surface 222 abuts against the inner wall of the receiving groove 211.

[0039] It should be noted that the drive shaft 1 and the connecting part 221 are coaxially fixed. The connecting part 221, the abutment part 223 and the drive shaft 1 are integrally formed, which improves the structural strength and stability.

[0040] Furthermore, when the gear set is fixed coaxially with the locking block 21, the output shaft of the gear set is interference-fitted with the locking block 21 and passes through the bottom wall of the receiving groove 211. The bottom of the connecting part 221 is provided with a relief groove 224. When the connecting seat 22 rotates and is supported in the receiving groove 211, the output shaft of the gear is built into the relief groove 224.

[0041] On the other hand, the locking block 21 is provided with three clearance openings 212, which are evenly distributed on the outer wall of the locking block 21. The clearance openings 212 are connected to the receiving grooves 211. The locking pins 23 are cylindrical structures, and three locking pins 23 are provided. The three locking pins 23 are respectively built into the three clearance openings 212. The clearance openings 212 provide clearance and a movement path for the locking pins 23, so that the locking pins 23 can abut against the abutment part 223. The height of the locking pin 23 is equal to the height of the abutment portion 223. The diameter of the locking pin 23 is greater than the distance between the edge of the abutment portion 223 and the edge of the relief opening 212. When the locking pin 23 is installed in the relief opening 212, since the diameter of the locking pin 23 is greater than the distance between the edge of the abutment portion 223 and the edge of the relief opening 212, and the relief groove 224 is connected to the receiving groove 211, part of the structure of the locking pin 23 extends to the outside of the receiving groove 211 and the relief opening 212.

[0042] This explains that when the equipment is running normally, the output of the drive motor rotates, which drives the gear set to rotate. Since the gear set is coaxially fixed with the locking block 21, it further drives the locking block 21 to rotate. At this time, the locking pin 23 is built into the relief opening 212. The rotation of the locking block 21 drives the locking pin 23 to rotate. When it rotates to a certain angle, the locking pin 23 abuts against the abutment part 223, pushing the abutment part 223 to rotate. Since the connecting part 221, the abutment part 223 and the transmission shaft 1 are integrally formed, the connecting part 221 and the transmission shaft 1 are driven to rotate. Since the other end of the transmission shaft 1 is fixed to the pulley, the belt is sleeved on the pulley, driving the belt to rotate.

[0043] Furthermore, when the belt rotates in the opposite direction due to jamming or overload, or when the drive motor stops running, the belt drives the pulley to rotate in the opposite direction. Since one end of the drive shaft 1 is fixed coaxially with the pulley, the pulley drives the drive shaft 1 to move in the opposite direction. Since the other end of the drive shaft 1 is fixed coaxially with the connecting part 221, the connecting part 221, the abutment part 223, and the drive shaft 1 are integrally formed. The drive shaft 1 drives the connecting part 221 and the abutment part 223 to rotate in the opposite direction. Since the side of the abutment part 223 is provided with an arc surface 222, the arc surface 222 reduces the frictional resistance between the abutment part 223 and the receiving part, reduces the jamming feeling during rotation, and improves the stability during rotation.

[0044] Furthermore, since the drive motor stops running, the locking block 21 and the locking pin 23 stop rotating. At this time, the connecting part 221 and the abutting part 223 rotate within the receiving groove 211. When they rotate to a certain angle, the abutting part 223 abuts against the locking pin 23, pushing the locking pin 23 to move within the clearance opening 212. Since the abutting part 223 abuts against the locking pin 23, the contact between the abutting part 223 and the locking pin 23 forms a buffer, reducing some of the energy of the reverse rotation impact through friction, and reducing the possibility of the drive motor reversing. When they rotate to a certain angle again, the abutting part 223 pushes the locking pin 23 until the locking pin 23 abuts against the side wall of the clearance opening 212. Since the locking block 21 is coaxially fixed with the output shaft of the gear set, the instantaneous acceleration of the gear set being forced to reverse can be reduced, limiting the speed of the gear set's reverse rotation, further reducing the possibility of the drive motor reversing, and reducing the risk of damage to the internal components of the drive motor from the reverse impact.

[0045] Reference Figure 6In addition, the belt anti-reverse mechanism also includes a housing 3, which is a cylindrical structure. When the housing 3 is placed over the locking assembly 2, the inner wall of the housing 3 abuts against the outer wall of the locking pin 23, and the top of the drive shaft 1 passes through the top of the housing 3. The housing 3 protects the locking assembly 2, limits the locking pin 23, reduces the chance of the locking pin 23 falling out of the clearance opening 212 due to external force, and isolates the locking assembly 2 from the outside.

[0046] Reference Figure 7 Furthermore, the outer peripheral wall of the housing 3 is also provided with a mounting part 4, which is integrally formed with the housing 3. The mounting part 4 is provided with a screw hole, and the mounting part 4 is fixedly connected to the external equipment by inserting bolts into the screw hole. By fixing the housing 3 to the external equipment with bolts, the displacement of the housing 3 due to vibration or external force during rotation is reduced, and the positions of the locking block 21, the connecting seat 22 and the locking pin 23 are relatively stable.

[0047] The implementation principle of a belt anti-reverse transmission mechanism according to an embodiment of this application is as follows:

[0048] The belt anti-reverse transmission mechanism works in conjunction with the drive shaft and locking assembly. One end of the drive shaft is fixed coaxially with the pulley, and the other end is fixedly connected to the locking assembly. The locking assembly is fixed coaxially with the output shaft of the gear set. When the belt is jammed, overloaded, or suddenly stops, the reverse resistance of the belt is directly transmitted to the drive shaft through the pulley. The locking assembly restricts the further rotation of the drive shaft, further restricts the reverse rotation of the gear set and the reverse torsion of the drive motor, reduces the possibility of the drive motor reversing, and reduces the risk of damage to the internal components of the drive motor by reverse impact.

[0049] The locking assembly includes a locking block, a locking pin, and a connecting seat. The locking block is coaxially fixed to the output shaft of the gear set by an interference fit. The connecting seat includes a connecting part and an abutting part, which are integrally formed with the transmission shaft. The locking block is provided with an annular receiving groove and a clearance opening. The connecting seat is rotatably supported on the receiving groove, and the locking pin is built into the clearance opening.

[0050] When the equipment starts running, the drive motor starts and the output shaft of the drive motor drives the gear set to rotate. The locking block rotates synchronously with the gear set. The locking pin is located in the clearance opening and does not contact the abutment part of the connecting seat. At this time, the locking pin rotates with the locking block. When it rotates to a certain angle, the locking pin abuts against the abutment part. Since the connecting part, the abutment part and the transmission shaft are integrally formed, the connecting part and the transmission shaft are driven to rotate, thereby driving the pulley and belt to run.

[0051] When the belt rotates in the opposite direction due to jamming, overload, or power failure, the reverse movement of the belt drives the pulley, and the drive shaft rotates in the opposite direction, pushing the connecting part and the abutting part to rotate in the opposite direction in the receiving groove. The arc surface set on the abutting part reduces frictional resistance when the abutting part abuts against the inner wall of the receiving groove, ensuring a smooth and jam-free rotation process.

[0052] When the connecting seat rotates to a certain angle, the abutting part abuts against the locking pin, generating frictional resistance. The contact between the abutting part and the locking pin forms a buffer, reducing some of the energy of the reverse rotation impact through friction. The abutting part further pushes the locking pin to move along the clearance opening. When it continues to rotate in the opposite direction for a certain angle, the locking pin abuts against the side wall of the clearance opening. Since the locking block is coaxially fixed with the output shaft of the gear set, it can reduce the instantaneous acceleration of the gear set being forced to reverse, limit the speed of the gear set's reverse rotation, further reduce the possibility of the drive motor's reverse twisting, and reduce the risk of damage to the internal components of the drive motor from the reverse impact.

[0053] In addition, the belt anti-reverse mechanism also includes a housing, which is a cylindrical structure. When the housing is placed over the locking assembly, it protects the locking assembly. The housing can limit the locking pin, reducing the chance of the locking pin falling out of the clearance opening due to external force, and isolating the locking assembly from the outside.

[0054] Furthermore, the outer peripheral wall of the housing is also provided with a mounting part, which is fixedly connected to the external equipment by bolts. By fixing the housing to the external equipment with bolts, the displacement of the housing due to vibration or external force during rotation is reduced, ensuring that the positions of the locking block, connecting seat and locking pin are relatively stable.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A belt anti-reverse transmission mechanism, connected between a gear set and a pulley, installed on equipment, characterized in that, The device includes a drive shaft (1) and a locking assembly (2). The locking assembly (2) includes a locking block (21) and a connecting seat (22). The locking block (21) is coaxially fixed with the output shaft of the gear set. The top of the locking block (21) is provided with a receiving groove (211). The connecting seat (22) is rotatably supported in the receiving groove (211). The connecting seat (22) is coaxially fixed with the drive shaft (1). When the connecting seat (22) rotates a certain angle relative to the locking block (21), the locking block (21) limits the connection seat (22).

2. The belt anti-reverse transmission mechanism according to claim 1, characterized in that, The locking assembly (2) further includes a locking pin (23), which is disposed on the locking block (21). The connecting seat (22) includes a connecting part (221) and an abutting part (223). The connecting part (221) is coaxially fixed with the transmission shaft (1). The abutting part (223) is disposed on the outer peripheral surface of the connecting part (221). Part of the structure of the locking pin (23) extends into the receiving groove (211). When the connecting part (221) rotates a certain angle relative to the locking block (21), the abutting part (223) abuts against the locking pin (23).

3. The belt anti-reverse transmission mechanism according to claim 2, characterized in that, The locking block (21) is provided with a clearance opening (212), which is connected to the receiving groove (211), and the locking pin (23) is built into the clearance opening (212).

4. The belt anti-reverse transmission mechanism according to claim 2, characterized in that, The side of the abutting part (223) is provided with an arc surface (222), and the outer wall of the arc surface (222) abuts against the inner wall of the receiving groove (211).

5. A belt anti-reverse transmission mechanism according to claim 2, characterized in that, The bottom of the connecting part (221) is provided with a relief groove (224). The output shaft of the gear set is interference-fitted with the locking block (21) and passes through the bottom groove wall of the receiving groove (211). The relief groove (224) is used to accommodate the output shaft of the gear set.

6. The belt anti-reverse transmission mechanism according to claim 2, characterized in that, It also includes a housing (3), which covers the outside of the locking assembly (2), the inner wall of the housing (3) abuts against the outer wall of the locking post (23), and the top of the drive shaft (1) passes through the top of the housing (3).

7. The belt anti-reverse transmission mechanism according to claim 6, characterized in that, The outer peripheral wall of the housing (3) is also provided with a mounting part (4), which is fixedly connected to the equipment by bolts.

8. A belt anti-reverse transmission mechanism according to claim 2, characterized in that, The connecting part (221), the abutting part (223) and the transmission shaft (1) are integrally formed 2.

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