A coupling for continuous rolling mill with online pin replacement

Abstract

This invention provides a coupling for online pin replacement in continuous rolling mills, comprising a motor, the output shaft of which corresponds to the center of the roller shaft to be rotated, a motor bushing and a roller bushing respectively fitted on the output shaft and the roller shaft, a control structure fitted on the motor bushing, and a housing fixed to the outer shell of the motor, the housing having a hopper for storing pins; rotation of the motor bushing drives the control structure to reciprocate within the housing, pushing the pins through the motor bushing and the roller bushing, a detection structure connected to the control structure fitted on the roller bushing, the detection structure driving the control structure to replace worn pins. The coupling provided by this invention has low maintenance costs, is easy to disassemble, and can automatically detect and replace worn pins online, greatly improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of coupling technology, and more specifically to a coupling for continuous rolling mill with online replacement of pins. Background Technology

[0002] The high-speed input shaft of the tension roller reducer in the stainless steel continuous rolling and washing line generally uses a high-torque coupling to transmit power. It usually needs to have advantages such as compact structure, small turning radius, large load capacity, high transmission efficiency, low noise and long maintenance cycle.

[0003] Commonly used couplings are classified into drum gear couplings, plum blossom couplings, and pin couplings. Drum gear couplings, which are more commonly used, rely on tooth surface contact for transmission. During rotation, they are easily affected by vibration, leading to increased noise and even tooth surface damage. Furthermore, drum gear couplings require regular lubrication to reduce tooth surface wear. Frequent downtime for maintenance affects production efficiency and increases maintenance costs. When replacing couplings, it is necessary to disassemble the shaft ends of adjacent equipment, and each reinstallation requires high-precision alignment adjustment, which is time-consuming and labor-intensive.

[0004] Flower-shaped couplings and pin-type couplings do not require regular lubrication, but the wear caused by long-term use can lead to a decrease in machining accuracy that is not easily detected, and can easily result in defective products. Summary of the Invention

[0005] In view of the above, it is necessary for the present invention to provide a coupling that has low maintenance cost, is easy to disassemble, and can be automatically detected and replaced online.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coupling for online pin replacement in continuous rolling mill includes a motor bushing, a roller bushing, and a pin. The motor bushing and the roller bushing are aligned and abut against each other. The pin passes through the abutting end of the motor bushing and the roller bushing. A control structure is fitted on the motor bushing, and a housing is fitted on the control structure. The housing abuts against the outer circumferential surface of the motor bushing to seal the housing.

[0008] The housing includes a hopper, which is correspondingly arranged with the control structure, and the hopper stores column pins.

[0009] The roller sleeve is equipped with a detection structure located inside the housing. The control structure drives the detection structure to move, which in turn drives the pin in the hopper into the control structure to replace the pin.

[0010] Furthermore, the motor bushing abuts against the roller bushing at one end with several pin holes at equal intervals. A pin is inserted into each pin hole, and the diameter of each pin hole is smaller than the diameter of the pin. A pressure relief hole is provided between two adjacent pin holes. A sealing plate is provided at the end of the pressure relief hole away from the roller bushing. The sealing plate is rotatably fitted onto the motor bushing to block the pressure relief hole. A rotatable lever is provided on the motor bushing to abut against the sealing plate. The end of the lever away from the sealing plate is connected to a detection structure. The detection structure presses the lever to rotate, pushing the sealing plate to release the blockage of the pressure relief hole, so that the gas in the housing can be discharged.

[0011] Furthermore, the control structure is installed on the motor bushing at one end near the sealing plate, and includes a receiving component, several stop rods and a push plate. The receiving component is fixed on the motor bushing and one end is close to the sealing plate. Several stop rods are respectively set at both ends of the receiving component. The push plate is set at the end of the receiving component away from the sealing plate. A track block is set on the outer circumferential surface of the push plate. The track block cooperates with the housing to drive the push plate to move back and forth.

[0012] Furthermore, the push plate is equipped with several one-way valves. When the push plate moves closer to the receiving part, it causes the one-way valves to close, compressing the air in the housing. When the push plate moves in the opposite direction, it causes the one-way valves to open, drawing air into the housing.

[0013] Furthermore, the housing includes a shaft housing, a roller housing, and a seal. The shaft housing is fitted onto the roller housing. One end of the shaft housing is fixedly connected to the outer casing of the motor, and the other end is fixedly connected to the roller housing. The roller housing is fitted onto the detection structure. The seal is installed inside the shaft housing and extends into the roller housing to seal the connection between the shaft housing and the roller housing.

[0014] Furthermore, a number of air intake valves are installed at one end of the shaft housing near the motor, and the air intake valves draw air from outside the shaft housing into the shaft housing in one direction.

[0015] Furthermore, the shaft housing also includes a feed plate, which is slidably connected to one end of the hopper near the receiving part. The stop bar pushes against the feed plate to slide open the hopper, allowing the pin in the hopper to enter the receiving part.

[0016] Furthermore, the detection structure includes several detection tubes, several detection plates, and a detection ring. The detection tubes are arranged on the roller sleeve and correspond to the center of each pin hole. Each detection plate is installed inside the detection tube to seal the detection tube. The detection ring is sleeved on the roller sleeve and close to the sealing ring.

[0017] Furthermore, each of the aforementioned detection plates has a transmission rod extending from it and abutting against the detection ring, thereby driving the detection ring to move. A drive rod is connected to the transmission rod and passes through the roller bushing. The motor bushing extends to the side of the receiving part and connects to two adjacent stop rods, driving the two stop rods to move away from each other.

[0018] Furthermore, a sliding rod protrudes from the detection ring, extending through the sealing ring to correspond with the lever, and the sliding rod pushes the lever to rotate.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. By setting a reciprocating push plate inside the housing, the air inside the housing is compressed, and the pressurized air passes through the gap between the pin and the pin hole to drive the detection structure to move, thereby causing the new pin to fall into the control structure to replace the worn pin. This realizes online automatic replacement of the pin and avoids downtime.

[0021] 2. After the push plate compresses the air inside the housing, if the detection structure does not detect the pin that needs to be replaced, the pressure lever rotates, causing the sealing plate to move and open the pressure relief hole, so that the rapidly flowing air can blow out the dust scattered inside the housing.

[0022] 3. By setting a protrusion on the detection tube and cooperating with a reciprocating push plate, the stability of the pin in the pin hole is achieved, and the axial movement of the pin is avoided after long-term operation. Attached Figure Description

[0023] Figure 1 This is a perspective structural diagram of an embodiment of this application;

[0024] Figure 2 Exploded view of the coupling;

[0025] Figure 3 Structural diagram of motor bushing and roller bushing;

[0026] Figure 4 This is a diagram of the internal structure of the coupling;

[0027] Figure 5 Here is a structural diagram of the shaft housing;

[0028] Figure 6 This is a three-dimensional view of the internal structure of the coupling.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Electric motor; 2. Motor bushing; 201. Pin hole; 202. Pressure relief hole; 21. Roller bushing; 22. Sealing plate; 23. Lever; 3. Control structure; 31. Receiving component; 311. Receiving groove; 32. Stop bar; 33. Push plate; 331. Track block; 332. One-way valve; 4. Housing; 41. Shaft housing; 411. Hopper; 412. Discharge plate; 413. Air inlet valve; 42. Roller housing; 43. Seal; 5. Pin; 6. Detection structure; 61. Detection tube; 611. Fixed tube; 612. Sliding tube; 62. Detection plate; 621. Transmission rod; 622. Drive rod; 63. Detection ring; 631. Slide rod. Detailed Implementation

[0031] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0032] like Figure 1 , Figure 2 , Figure 4 As shown, this embodiment of the invention provides a coupling for online replacement of pins in continuous rolling mills, including a motor 1. The output shaft of the motor 1 corresponds to the center of the roller shaft to be rotated. A motor bushing 2 and a roller shaft sleeve 21 are respectively fitted onto the output shaft of the motor 1 and the roller shaft. A control structure 3 is fitted onto the motor bushing 2. A housing 4 is provided over the control structure 3. The housing 4 is fixed to the outer shell of the motor 1, and a hopper 411 for storing pins 5 is provided on the housing 4. The rotation of the motor bushing 2 drives the control structure 3 to reciprocate within the housing 4, pushing the pins 5 through the motor bushing 2 and the roller shaft sleeve 21. A detection structure 6 is fitted onto the roller shaft sleeve 21 and connected to the control structure 3. The detection structure 6 drives the control structure 3 to replace the worn pins 5.

[0033] When the worn pin 5 needs to be replaced, the motor 1 drives the motor bushing 2 to rotate, which in turn drives the control structure 3 to reciprocate within the housing 4. Air is drawn into the housing 4 and compressed. The air passes through the gap between the worn pin 5 and the motor bushing 2 and roller bushing 21, pushing the detection structure 6 to move. The detection structure 6 drives the control structure 3 to move synchronously, so that the new pin 5 in the receiving hopper 411 aligns with the center of the worn pin 5. Then, the reciprocating control structure 3 pushes the new pin 5 to replace the worn pin 5. The worn pin 5 is discharged from the detection structure 6, thus completing the online replacement of the coupling pin 5, avoiding downtime during coupling maintenance, and improving production efficiency.

[0034] Reference Figure 2 , Figure 3As shown, the ends of the motor bushing 2 and the roller bushing 21 that abut against each other both have radially extending flanges. Several pin holes 201 are evenly spaced on the flanges for inserting pins 5. The pins 5 drive the motor bushing 2 and the roller bushing 21 to rotate synchronously. The diameter of each pin hole 201 is slightly smaller than the diameter of the pin 5, ensuring an interference fit between the pin 5 and the pin hole 201. A pressure relief hole 202 is provided between every two adjacent pin holes 201 to discharge high-pressure air from the housing 4. Each pressure relief hole 202 is sealed by a sealing plate 22 fitted on the motor bushing 2. A rotatable lever 23 is also provided on the motor bushing 2, abutting against the sealing plate 22. The end of the lever 23 away from the sealing plate 22 is connected to a detection structure 6. The detection structure 6 presses the lever 23 to rotate, thereby pushing the sealing plate 22 to release the seal on the pressure relief hole 202, allowing the high-pressure gas inside the housing 4 to escape. Understandably, the pin 5 is made of modified nylon (PA66 + 30% glass fiber) to give it self-lubricating properties and high impact resistance; a copper rod can also be inserted into the center of the pin 5 to increase its impact resistance.

[0035] When the pin 5 is not worn, the motor 1 rotates, causing the motor bushing 2 to rotate synchronously. The motor bushing 2 then moves the control structure 3 away from the motor 1, pressurizing the air stored in the housing 4. Simultaneously, the lever 23 rotates synchronously with the motor bushing 2. Each rotation of the lever 23 contacts the detection structure 6, causing the detection structure 6 to rotate and push the sealing plate 22 to expel the pressurized air from the housing 4. The expelled air flows rapidly within the housing 4, simultaneously blowing out the dust generated by the wear of the pin 5. After one rotation of the motor bushing 2, the lever 23 passes the detection structure 6, causing the sealing plate 22 to return to its original position.

[0036] Please see Figure 4 , Figure 6The control structure 3 is installed on the motor bushing 2 near the end of the sealing plate 22, and includes a receiving component 31, a stop bar 32, and a push plate 33. The receiving component 31 is fixedly sleeved on the motor bushing 2, and several "U"-shaped receiving grooves 311 are provided on the outer circumference of the receiving component 31. Each receiving groove 311 corresponds to each pin hole 201 and its opening faces the housing 4, for receiving the pin 5 in the hopper 411. Two stop bars 32 that can slide towards each other are installed on each receiving groove 311. The two stop bars 32 are respectively located at both ends of the opening of the receiving groove 311, and both ends of each stop bar 32 extend outside the 311. The initial distance between the two stop bars 32 is less than the length of the pin 5, preventing the pin 5 in the hopper 411 from falling directly into the receiving groove 311; when the two stop bars 32 slide away from each other, the obstruction of the pin 5 is released. The push plate 33 is located at the end of the receiving part 31 away from the sealing plate 22. Several push posts protrude from the push plate 33, each push post corresponding to the center of each receiving groove 311. A track block 331 is provided on the outer peripheral surface of the push plate 33. The track block 331 is inserted into the housing 4. A corresponding spiral track groove is provided inside the housing 4 to cooperate with the track block 331, so that the track block 331 moves back and forth along the track groove inside the housing 4.

[0037] Furthermore, several one-way valves 332 are installed on the push plate 33. When the push plate 33 moves closer to the receiving part 31, the one-way valves 332 close, causing the air pressure on the side of the push plate 33 closer to the receiving part 31 to increase. When the push plate 33 moves in the opposite direction, the one-way valves 332 open, drawing the air from the side of the push plate 33 away from the receiving part 31 into the side closer to the receiving part 31.

[0038] Reference Figure 2 , Figure 4 , Figure 5 The housing 4 includes a shaft housing 41, a roller housing 42, and a seal 43. The shaft housing 41 is fitted onto the control structure 3. One end of the shaft housing 41 is fixedly connected to the housing of the motor 1, and the other end is fixedly connected to the roller housing 42. A feed plate 412 is also installed inside the shaft housing 41. The feed plate 412 is slidably connected to the end of the hopper 411 near the receiving groove 311. When the stop rod 32 moves away from each other, it pushes against the feed plate 412 to slide open the hopper 411, and the pin 5 inside the hopper 411 enters the receiving groove 311. The seal 43 is installed inside the shaft housing 41 and extends into the roller housing 42, sealing the connection between the shaft housing 41 and the roller housing 42. The inner wall of the seal 43 also seals the connection between the motor bushing 2 and the roller bushing 21. Furthermore, several air inlet valves 413 are installed at the end of the shaft housing 41 near the motor 1. The air inlet valves 413 allow air from outside the shaft housing 41 to enter the shaft housing 41 in one direction. Furthermore, a receiving bin is provided on the roller shell 42 for collecting worn pins 5, and a filter screen is installed at the bottom of the receiving bin to allow gas inside the roller shell 42 to be discharged.

[0039] Reference Figure 4, Figure 6 The detection structure 6 includes several detection tubes 61, several detection plates 62, and a detection ring 63. The detection tubes 61 are disposed on the roller sleeve 21 and correspond to the center of each pin hole 201. Each detection tube 61 includes a fixed tube 611 and a sliding tube 612. The fixed tube 611 is fixed to the roller sleeve 21, and an elastic plate is provided on the inner wall of the fixed tube 611 to push out the pin 5 that enters the fixed tube 611. The sliding tube 612 is axially slidably mounted on the fixed tube 611 and corresponds to the stop rod 32. The sliding tube 612 abuts against the roller sleeve 21, and a protrusion is provided at the end of the sliding tube 62 that abuts against the pin 5 to prevent the pin 5 from moving axially.

[0040] Each detection plate 62 is installed inside the detection tube 61 and close to the protrusion, sealing the cross-section formed by the fixed tube 611 and the sliding tube 612, allowing high-pressure gas to pass through the gap between the pin 5 and the pin hole 201 and enter the detection tube 61, pushing the detection plate 62 to move. Each detection plate 62 has a transmission rod 621 extending from it, abutting against the sealing ring 42. A drive rod 622 is connected to the transmission rod 621, passing through the roller sleeve 21 and the motor sleeve 2, extending to the side of the receiving trough 311 and connecting to a nearby stop rod 32. The drive rod 622 moves with the detection plate 62, thereby causing the two stop rods 32 to slide away from each other. A detection ring 63 is sleeved on several transmission rods 621. A sliding rod 631 protrudes from the detection ring 63, passing through the sealing ring 42 and extending to correspond to the lever 23. An elastic element is provided between the detection ring 63 and the roller sleeve 21 for resetting after the transmission rod 621 moves the detection ring 63.

[0041] When gas enters the detection tube 61 and pushes the detection plate 62 to move, the detection plate 62 drives the detection ring 63 to move synchronously via the transmission rod 621. This causes the detection rod 631 to disengage from the stop lever 23, preventing air from escaping from the pressure relief hole 202 and allowing it to continuously flow into the detection tube 61. Furthermore, the transmission rod 621 drives the drive rod 622 to move synchronously, which in turn causes the two corresponding stop levers 32 to move in opposite directions.

[0042] The implementation principle of an automatic conveying mechanism for a coating production line according to an embodiment of this application is as follows: First, the motor 1 is started to drive the motor bushing 2 to rotate, which drives the push plate 33 to move back and forth, drawing air into the shaft housing 41 and pressurizing it. The pressurized gas enters the gap between the pin holes 202 of the pin 5 and flows into the detection tube 61, pushing the detection plate 62 to move. This, in turn, drives the slide rod 631 of the detection ring 63 to move synchronously with the transmission rod 621, releasing the obstruction of the lever 23. The lever 23 can no longer push open the sealing plate 22 blocking the pressure relief hole 202, and the pressurized gas in the shaft housing 41 continues to enter the detection tube 61. At the same time, the drive rod 622 moves synchronously with the transmission rod 621, driving the two stop rods 32 to move away from each other. At this time, the stop rods 32 push the material feeding plate 412 to slide, releasing the blockage of the material bin 411, and the pin 5 in the material bin 411 enters the receiving groove 311. Then, the protruding pusher on the push plate 33 pushes the pin 5 to move against the pin hole 202; the worn pin 5 moves against the protrusion of the sliding tube 612, so that the worn pin 5 can fall off when it is completely pushed against the pin hole 202. Finally, all moving parts return to their original positions, and the above process is repeated after the detection tube 61 detects the worn pin 5 again.

[0043] The embodiments described above merely illustrate implementation methods of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A coupling for online replacement of pins in continuous rolling mill, comprising a motor bushing (2), a roller bushing (21), and a pin (5), wherein the motor bushing (2) and the roller bushing (21) are in abutment with each other at their centers, and the pin (5) passes through the end of the motor bushing (2) and the roller bushing (21) that are in abutment with each other, characterized in that, The motor bushing (2) is fitted with a control structure (3), and the control structure (3) is fitted with a housing (4). The housing (4) abuts against the outer circumferential surface of the motor bushing (2) to seal the housing (4). The housing (4) includes a hopper (411), which is correspondingly arranged with the control structure (3). The hopper (411) stores a pin (5). The roller sleeve (21) is fitted with a detection structure (6), which is located inside the housing (4). The control structure (3) drives the detection structure (6) to move, which in turn drives the pin (5) in the hopper (411) to enter the control structure (3) to replace the pin (5). The motor bushing (2) and the roller bushing (21) are provided with a number of pin holes (201) at equal intervals at one end. The pin (5) is inserted into each pin hole (201). The diameter of each pin hole (201) is smaller than the diameter of the pin (5). A pressure relief hole (202) is provided between two adjacent pin holes (201). A sealing plate (22) is provided at the end of the pressure relief hole (202) away from the roller bushing (21). The sealing plate (22) is rotatably sleeved on the motor bushing (2) to block the pressure relief hole (202). A rotatable lever (23) is provided on the motor bushing (2) to abut against the sealing plate (22). The end of the lever (23) away from the sealing plate (22) is connected to the detection structure (6). The detection structure (6) presses the lever (23) to rotate, pushing the sealing plate (22) to release the blockage of the pressure relief hole (202) so that the gas in the housing (4) can be discharged. The control structure (3) is installed on the motor bushing (2) at one end near the sealing plate (22), including a receiving part (31), several stop rods (32) and a push plate (33). The receiving part (31) is fixed on the motor bushing (2) and one end is close to the sealing plate (22). Several stop rods (32) are respectively set at both ends of the receiving part (31). The push plate (33) is set at the end of the receiving part (31) away from the sealing plate (22). A track block (331) is set on the outer circumferential surface of the push plate (33). The track block (331) cooperates with the housing (4) to drive the push plate (33) to move back and forth.

2. The coupling according to claim 1, characterized in that, The push plate (33) is equipped with several one-way valves (332). When the push plate (33) moves closer to the receiving part (31), it causes the one-way valves (332) to close, compressing the air in the housing (4). When the push plate (33) moves in the opposite direction, it causes the one-way valves (332) to open, drawing air into the housing (4).

3. The coupling according to claim 1, characterized in that, The housing (4) includes a shaft housing (41), a roller housing (42), and a seal (43). The shaft housing (41) is fitted onto the roller sleeve (21). One end of the shaft housing (41) is fixedly connected to the outer casing of the motor (1), and the other end is fixedly connected to the roller housing (42). The roller housing (42) is fitted onto the detection structure (6). The seal (43) is installed inside the shaft housing (41) and extends into the roller housing (42), sealing the connection between the shaft housing (41) and the roller housing (42).

4. The coupling according to claim 3, characterized in that, Several air intake valves (413) are installed at one end of the shaft housing (41) near the motor (1). The air intake valves (413) draw air from outside the shaft housing (41) into the shaft housing (41) in one direction.

5. The coupling according to claim 4, characterized in that, The shaft housing (41) also includes a feed plate (412), which is slidably connected to one end of the hopper (411) near the receiving part (31). The stop bar (32) pushes against the feed plate (412) to slide open the hopper (411) so that the pin (5) in the hopper (411) can enter the receiving part (31).

6. The coupling according to claim 1, characterized in that, The detection structure (6) includes several detection tubes (61), several detection plates (62) and a detection ring (63). Several detection tubes (61) are set on the roller sleeve (21) and correspond to the center of each pin hole (201). Each detection plate (62) is installed inside the detection tube (61) to seal the detection tube (61). The detection ring (63) is sleeved on the roller sleeve (21) and close to the seal (43).

7. The coupling according to claim 6, characterized in that, Each of the detection plates (62) has a transmission rod (621) extending from it and abutting against the detection ring (63), which drives the detection ring (63) to move. A drive rod (622) is connected to the transmission rod (621) and passes through the roller sleeve (21). The motor sleeve (2) extends to the side of the receiving part (31) and connects to two adjacent stop rods (32), driving the two stop rods (32) to move away from each other.

8. The coupling according to claim 7, characterized in that, A slide rod (631) protrudes from the detection ring (63). The slide rod (631) passes through the seal (43) and extends to correspond with the lever (23). The slide rod (631) pushes the lever (23) to rotate.

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