Driving three-phase motor capable of quickly parking

Abstract

The invention provides a driving three-phase motor capable of quickly parking, and relates to the technical field of three-phase motors, and the motor comprises a housing which is of a cylindrical cavity structure and is internally provided with a stator, and the stator is internally provided with a rotor; a connecting shaft is arranged in front of the rotor; an adjusting assembly is arranged on the connecting shaft, by rotating an adjusting nut and utilizing the springback process of a first compression spring, the pressing effect on the connecting shaft can be relieved, a limiting protruding shaft can be made to be separated from a limiting clamping groove in a sliding mode, meanwhile, a tool is used for disassembling the bearing seat, and the connecting shaft is driven to be taken out forwards; therefore, when the connecting shaft deforms or is damaged due to long-time use, the connecting shaft can be conveniently and quickly replaced, the structure is simple, the assembly and disassembly operation is flexible, and the problems that when an existing three-phase motor for driving is used, a driving shaft is prone to deformation or damage in the long-time rotation driving process, and a rotor assembly and the driving shaft are generally arranged to be of an integral structure, and the cost is low are solved. Therefore, the disassembly and replacement processes of the driving shaft are tedious.

Description

Technical Field

[0001] The invention relates to the technical field of three-phase motors, and in particular to a three-phase driving motor capable of rapid parking. Background Art

[0002] Three-phase motors work on the principle of rotating magnetic fields from AC power. They are usually composed of three electromagnetic coils, each powered by a single phase of power. The three phases of the AC power are 120 degrees out of phase, so the currents in the coils are also 120 degrees out of phase, which enables the magnetic field to rotate. When the magnetic field interacts with the motor rotor, a rotational force and torque are generated, causing the motor's rotor to rotate. Three-phase motors are widely used in industry, agriculture, and homes.

[0003] When the existing three-phase driving motor is in use, the driving shaft is prone to deformation or damage during long-term rotation and driving. Since the rotor assembly and the driving shaft are usually configured as an integral structure, the process of disassembling and replacing the driving shaft is relatively cumbersome. In addition, the rotor assembly is prone to vibration during rotation, and its axis will shift, resulting in increased axial load and affecting the service life of the motor. In addition, the speed and stop position of the motor are difficult to control, and the rotational inertia of the rotor assembly can easily cause unnecessary injuries and equipment damage. Summary of the invention

[0004] The disclosed embodiment relates to a three-phase driving motor that can stop quickly. By rotating the adjusting nut and utilizing the rebound process of the first compression spring, the clamping effect on the connecting shaft can be released, and the limiting cam can be slid out of the limiting groove. At the same time, the bearing seat can be disassembled by using tools to drive the connecting shaft to be taken out forward. Therefore, when the connecting shaft is deformed or damaged after long-term use, it is convenient to quickly replace it. It has a simple structure and flexible loading and unloading operations.

[0005] According to a first aspect of the present disclosure, a three-phase driving motor capable of rapid stopping is provided, specifically comprising: a shell, wherein the shell is a cylindrical cavity structure, and a stator is arranged in the shell, and a rotor is arranged in the stator; a connecting shaft is arranged in front of the rotor; an adjusting assembly is arranged on the connecting shaft; a fixed circular plate is arranged between the rotor and the connecting shaft; adjusting frames are arranged on the left and right sides of the front of the shell, and the two adjusting frames are distributed in a vertically parallel manner; and a is arranged between the bottom ends of the two adjusting frames.

[0006] In at least some embodiments, a fixing frame is provided at the bottom of the shell, a front end cover is provided at the front of the shell, and the front end cover is fixedly connected to the shell by a locking bolt, and a rear end cover is provided at the rear of the shell.

[0007] In at least some embodiments, the front end cover is a cylindrical cavity structure, and the front inner wall of the cavity of the front end cover is provided with two connecting seats, and the two connecting seats are distributed symmetrically in an upper and lower manner, a mounting groove is provided at the front center position of the front end cover, and the outer peripheral side wall of the front end cover is provided with two limiting through holes, and the two limiting through holes are distributed in a left-right symmetrical manner, and the limiting through holes correspond to the position of the adjustment frame.

[0008] In at least some embodiments, a drive shaft is provided at the center position of the rotor, and the rear drive shaft is rotatably connected to the rear end cover through a bearing, and the front drive shaft is rotatably connected to the fixed circular plate through a bearing, a connecting sleeve is provided at the front end of the drive shaft, and two limit slots are provided at the front end of the connecting sleeve near the port, the limit slot is L-shaped, and the two limit slots are distributed in a centrally symmetrical manner.

[0009] In at least some embodiments, the connecting shaft is provided with two limiting cams on the outer peripheral surface near the rear end, and the two limiting cams are distributed in a symmetrical manner. The rear end of the limiting cam is slidably inserted into the connecting sleeve, and the limiting cam is clamped with the limiting groove. A threaded surface is provided on the outer peripheral surface at the middle section of the connecting shaft, and the threaded surface corresponds to the position of the adjustment component.

[0010] In at least some embodiments, the adjustment assembly includes a rotating tube, a bearing seat, an adjusting nut and a first compression spring. The bearing seat is rotatably mounted on the rotating tube, and the bearing seat is arranged in the mounting groove of the front end cover and is controlled by a locking bolt. An adjusting nut is provided at the front end of the rotating tube, the rotating tube is sleeved on the connecting shaft, and the adjusting nut is arranged on the threaded surface, and a first compression spring is provided at the rear end of the rotating tube, and the first compression spring is supported between the rotating tube and the connecting sleeve.

[0011] In at least some embodiments, a mounting frame is fixedly installed on the front side of the fixed circular plate by locking bolts, a limiting groove is provided on the front side of the mounting frame, and the connecting sleeve is located in the middle position of the limiting groove, and spline sleeves are provided on the left and right sides of the mounting frame, and the two spline sleeves are distributed in a symmetrical manner.

[0012] In at least some embodiments, telescopic rods are provided at the top positions on the relatively inner sides of the two adjustment frames, and the telescopic rods slide through the limiting through holes, spline shafts are provided at the relatively inner ends of the two telescopic rods, and the spline shafts slide through the spline sleeves, support frames are provided at the relatively inner ends of the two spline shafts, and the support frames are located in the limiting grooves, two rotating rollers are rotatably installed on the support frames, and the two rotating rollers are distributed in an upper and lower parallel manner, and the rotating rollers are rollingly connected to the connecting sleeves, a second compression spring is mounted on the spline shaft, and the second compression spring is supported between the mounting frame and the support frame.

[0013] In at least some embodiments, the adjustment frame is provided with limit sliders on the front and rear sides of the bottom end, and the two limit sliders are symmetrically distributed. Two adjustment frames are provided with mounting plates on the inner sides relatively to the bottom ends, and the two mounting plates are distributed in parallel up and down. Tooth plates are provided at the middle positions relatively to the inner sides of the two mounting plates, and the two tooth plates are distributed symmetrically up and down.

[0014] In at least some embodiments, a connecting frame is provided at the middle position of the top of the guide frame, and the connecting frame is connected to the front end cover, two limiting slide grooves are provided on the inner wall of the through groove of the guide frame, and the adjustment frame is slidably connected to the limiting slide grooves through a limiting slider, a micro motor is provided at the middle position of the rear part of the guide frame, a rotating shaft is provided at the end of the rotating shaft of the micro motor, and the rotating shaft is rotatably connected to the guide frame through a bearing, and the rotating shaft is located between the two mounting plates, a gear is provided on the rotating shaft, and the gear is meshingly connected to the gear plate.

[0015] The present invention provides a three-phase driving motor capable of rapid parking, which has the following beneficial effects: In the present invention, by rotating the adjusting nut and utilizing the rebound process of the first compression spring, the clamping effect on the connecting shaft can be released, and the limiting cam can be slid out of the limiting groove. At the same time, the bearing seat can be disassembled using tools to drive the connecting shaft forward and taken out. Therefore, when the connecting shaft is deformed or damaged after long-term use, it is convenient to quickly replace it. The structure is simple and the loading and unloading operations are flexible.

[0016] In addition, since the two sets of rotating rollers are rollingly connected to the connecting sleeve, and the spline shaft and the spline sleeve are slidingly matched, and the elastic action of the second compression spring is utilized, the drive shaft and the connecting sleeve can be supported. When the motor is started and operated, the drive shaft of the rotor can be stably positioned, effectively avoiding vibration when the rotor rotates, preventing its axis from shifting, and ensuring the reliability of the operation of the three-phase motor.

[0017] In addition, the micro motor provides power to drive the rotating shaft to rotate, and the gear and tooth plate meshing transmission can drive two mounting plates at the same time, driving the adjustment frame to slide toward each other along the limiting slide groove, and the telescopic rods and spline shafts on both sides drive two groups of rotating rollers to tighten the connecting sleeve, thereby realizing the control of the speed and stop position of the three-phase motor, avoiding unnecessary injuries and equipment damage caused by the rotational inertia of the rotor, and the structure is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture: Figure 1 A schematic diagram showing the overall axial viewing angle structure of the present application is shown; Figure 2 This application shows Figure 1 The schematic diagram after the front end cover is removed; Figure 3 A schematic diagram showing the rotor, connecting shaft and adjustment assembly of the present application is shown; Figure 4 A schematic diagram showing the explosion state of the connecting sleeve, the connecting shaft and the adjusting assembly of the present application; Figure 5 A schematic diagram showing the front end cover, fixed circular plate, adjustment frame and support frame of the present application is shown; Figure 6 A schematic diagram showing the explosion state of the front end cover, the bearing seat and the fixed circular plate of the present application is shown; Figure 7 A schematic diagram of a fixed circular plate, an adjustment frame and a support frame of the present application is shown; Figure 8 A schematic diagram showing the explosion state of the adjustment frame and the support frame of the present application is shown.

[0021] List of reference numerals: 1. Shell; 101. Fixing frame; 102. Front end cover; 1021. Connecting seat; 1022. Mounting slot; 1023. Position limiting through hole; 103. Rear end cover; 2. rotor; 201. driving shaft; 202. connecting sleeve; 203. limiting slot; 3. Connecting shaft; 301. Position limiting cam; 302. Threaded surface; 4. Adjustment assembly; 401. Rotating pipe; 402. Bearing seat; 403. Adjustment nut; 404. First compression spring; 5. Fixed circular plate; 501. Mounting frame; 502. Limiting groove; 503. Spline sleeve; 6. Adjustment frame; 601. Telescopic rod; 602. Spline shaft; 603. Support frame; 604. Rotating roller; 605. Second compression spring; 606. Limiting slider; 607. Mounting plate; 608. Tooth plate; 7. Guide frame; 701. Connecting frame; 702. Limiting slide; 703. Micro motor; 704. Rotating shaft; 705. Gear. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figures 1 to 8 : The present invention proposes a three-phase driving motor capable of rapid parking, comprising: a housing 1, the housing 1 being a cylindrical cavity structure, a stator being arranged in the housing 1, and a rotor 2 being arranged in the stator; a connecting shaft 3 being arranged in front of the rotor 2; an adjusting assembly 4 being arranged on the connecting shaft 3; a fixing circular plate 5 being arranged between the rotor 2 and the connecting shaft 3; adjusting frames 6 being arranged on the left and right sides of the front of the housing 1, and the two adjusting frames 6 being arranged in a vertically parallel manner; and a connecting shaft 3 being arranged between the bottom ends of the two adjusting frames 6; A fixing frame 101 is provided at the bottom of the shell 1, a front end cover 102 is provided at the front of the shell 1, and the front end cover 102 is fixedly connected to the shell 1 by locking bolts, and a rear end cover 103 is provided at the rear of the shell 1; The front end cover 102 is a cylindrical cavity structure, and the front inner wall of the cavity of the front end cover 102 is provided with two connecting seats 1021, and the two connecting seats 1021 are distributed in an upper and lower symmetrical manner, and a mounting groove 1022 is provided at the front center position of the front end cover 102, and the outer peripheral side wall of the front end cover 102 is provided with two limiting through holes 1023, and the two limiting through holes 1023 are distributed in a left-right symmetrical manner, and the limiting through holes 1023 correspond to the position of the adjustment frame 6.

[0024] In the present disclosure, Figure 3 and Figure 4 As shown, a driving shaft 201 is provided at the center of the rotor 2, and the rear driving shaft 201 is rotatably connected to the rear end cover 103 through a bearing, and the front driving shaft 201 is rotatably connected to the fixed circular plate 5 through a bearing, a connecting sleeve 202 is provided at the front end of the driving shaft 201, and two limiting grooves 203 are provided at the front end of the connecting sleeve 202 near the port, the limiting grooves 203 are L-shaped, and the two limiting grooves 203 are distributed in a centrally symmetrical manner; Two limiting convex shafts 301 are provided on the outer circumference near the rear end of the connecting shaft 3, and the two limiting convex shafts 301 are symmetrically distributed. The rear end of the limiting convex shaft 301 is slidably inserted into the connecting sleeve 202, and the limiting convex shaft 301 is engaged with the limiting groove 203. A threaded surface 302 is provided on the outer circumference at the middle section of the connecting shaft 3, and the threaded surface 302 corresponds to the position of the adjustment component 4. The adjusting assembly 4 includes a rotating pipe 401, a bearing seat 402, an adjusting nut 403 and a first compression spring 404. The bearing seat 402 is rotatably mounted on the rotating pipe 401, and the bearing seat 402 is arranged in the mounting groove 1022 of the front end cover 102 and is controlled by a locking bolt. An adjusting nut 403 is arranged at the front end of the rotating pipe 401, and the rotating pipe 401 is sleeved on the connecting shaft 3, and the adjusting nut 403 is arranged at the threaded surface 302. The rear end of the rotating pipe 401 is provided with a first compression spring. The first compression spring 404 is supported between the rotating tube 401 and the connecting sleeve 202. By rotating the adjusting nut 403 and utilizing the rebound process of the first compression spring 404, the clamping effect on the connecting shaft 3 can be released, so that the limiting cam 301 can slide out of the limiting slot 203. At the same time, the bearing seat 402 is disassembled by using tools to drive the connecting shaft 3 to be taken out forward, so that when the connecting shaft 3 is deformed or damaged after long-term use, it is convenient to quickly replace it.

[0025] In the present disclosure, Figure 7 As shown, a mounting frame 501 is fixedly installed on the front side of the fixed circular plate 5 by means of locking bolts, a limiting groove 502 is provided on the front side of the mounting frame 501, and the connecting sleeve 202 is located in the middle of the limiting groove 502, and a spline sleeve 503 is provided on the left and right sides of the mounting frame 501, and the two spline sleeves 503 are distributed in a symmetrical manner; A telescopic rod 601 is provided at the top position of the two adjustment frames 6 on the inner side relative to each other, and the telescopic rod 601 slides through the limiting through hole 1023, a spline shaft 602 is provided at the inner end relative to the two telescopic rods 601, and the spline shaft 602 slides through the spline sleeve 503, a support frame 603 is provided at the inner end relative to the two spline shafts 602, and the support frame 603 is located in the limiting groove 502, and two rotating rollers 604 are rotatably installed on the support frame 603, and the two rotating rollers 604 are distributed in an upper and lower parallel manner, and the rotating rollers 604 are connected to the connecting sleeve 202. Rolling connection, a second compression spring 605 is mounted on the spline shaft 602, and the second compression spring 605 is supported between the mounting frame 501 and the support frame 603. Since the two sets of rotating rollers 604 are rollingly connected to the connecting sleeve 202, and the spline shaft 602 and the spline sleeve 503 are slidably fitted, and the elastic effect of the second compression spring 605 is utilized, the drive shaft 201 and the connecting sleeve 202 can be supported. When the motor is in the process of starting and running, the drive shaft 201 of the rotor 2 can be stably positioned, and vibration when the rotor 2 rotates can be effectively avoided.

[0026] Embodiment 2, based on embodiment 1, as Figure 8As shown, the adjusting frame 6 is provided with limit sliders 606 on both sides of the front and rear ends near the bottom, and the two limit sliders 606 are symmetrically distributed, two adjusting frames 6 are provided with mounting plates 607 on the inner sides opposite to the bottom ends, and the two mounting plates 607 are distributed in parallel up and down, and tooth plates 608 are provided at the middle positions of the inner sides opposite to the two mounting plates 607, and the two tooth plates 608 are distributed in a symmetrical manner up and down; A connecting frame 701 is provided at the middle position of the top of the guide frame 7, and the connecting frame 701 is connected to the front end cover 102. Two limiting slide grooves 702 are provided on the inner wall of the through groove of the guide frame 7, and the adjustment frame 6 is slidably connected to the limiting slide groove 702 through a limiting slider 606. A micro motor 703 is provided at the middle position of the rear part of the guide frame 7. A rotating shaft rod 704 is provided at the end of the rotating shaft of the micro motor 703. The rotating shaft rod 704 is rotatably connected to the guide frame 7 through a bearing, and the rotating shaft rod 704 is located between the two mounting plates 607. The rotating shaft rod 704 A gear 705 is provided on it, and the gear 705 is meshed and connected with the tooth plate 608. When the motor needs to stop or slow down, the micro motor 703 provides power to drive the rotating shaft 704 to rotate. The gear 705 is meshed and transmitted with the tooth plate 608, so that the two mounting plates 607 can be driven at the same time, and the adjustment frame 6 can be driven to slide toward each other along the limiting slide groove 702. The two sets of rotating rollers 604 are driven by the telescopic rods 601 and the spline shaft 602 on both sides to press the connecting sleeve 202, thereby realizing the control of the speed and stop position of the three-phase motor.

[0027] The working principle of this embodiment is as follows: when in use, by rotating the adjusting nut 403 and utilizing the rebound process of the first compression spring 404, the pressing effect on the connecting shaft 3 can be released, so that the limiting convex shaft 301 can slide out of the limiting slot 203, and at the same time, the bearing seat 402 is disassembled by a tool to drive the connecting shaft 3 to be taken out forward, so that when the connecting shaft 3 is deformed or damaged after long-term use, it is convenient to quickly replace it; the two sets of rotating rollers 604 are rollingly connected with the connecting sleeve 202, and the spline shaft 602 is slidably matched with the spline sleeve 503, and the elastic effect of the second compression spring 605 can be used to adjust the driving shaft 201 and The connecting sleeve 202 is supported, and when the motor is in the process of starting and running, the driving shaft 201 of the rotor 2 can be stably positioned to effectively avoid vibration when the rotor 2 rotates; when the motor needs to stop or slow down, the micro motor 703 provides power to drive the rotating shaft 704 to rotate, and the gear 705 is engaged with the tooth plate 608 to drive the two mounting plates 607 at the same time, driving the adjustment frame 6 to slide toward each other along the limiting slide groove 702, and the two sets of rotating rollers 604 are driven by the telescopic rods 601 and the spline shaft 602 on both sides to press the connecting sleeve 202, thereby realizing the control of the speed and stop position of the three-phase motor.

[0028] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A three-phase motor for driving that can stop quickly. It is characterized in that include: The shell is a cylindrical cavity structure, and a stator is arranged in the shell, and a rotor is arranged in the stator; a connecting shaft is arranged in front of the rotor; an adjusting component is arranged on the connecting shaft; a fixed circular plate is arranged between the rotor and the connecting shaft; adjusting frames are arranged on the left and right sides of the front of the shell, and the two adjusting frames are distributed in a vertical and parallel manner; between the bottom ends of the two adjusting frames is arranged.

2. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that A fixing frame is provided at the bottom of the shell, a front end cover is provided at the front of the shell, and the front end cover is fixedly connected to the shell through a locking bolt, and a rear end cover is provided at the rear of the shell.

3. The three-phase driving motor capable of rapid parking according to claim 2, It is characterized in that The front end cover is a cylindrical cavity structure, and the front inner wall of the cavity of the front end cover is provided with two connecting seats, and the two connecting seats are distributed in an upper and lower symmetrical manner. A mounting groove is provided at the front center position of the front end cover, and the outer peripheral side wall of the front end cover is provided with two limiting through holes, and the two limiting through holes are distributed in a left-right symmetrical manner, and the limiting through holes correspond to the position of the adjustment frame.

4. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that A driving shaft is provided at the center position of the rotor, and the rear driving shaft is rotatably connected to the rear end cover through a bearing, and the front driving shaft is rotatably connected to the fixed circular plate through a bearing. A connecting sleeve is provided at the front end of the driving shaft, and two limit slots are provided at the front end of the connecting sleeve near the port. The limit slot is L-shaped, and the two limit slots are distributed in a centrally symmetrical manner.

5. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that The connecting shaft is provided with two limit cams on the outer circumferential surface near the rear end, and the two limit cams are distributed in a symmetrical manner. The rear end of the limit cam is slidably inserted into the connecting sleeve, and the limit cam is clamped with the limit slot. The outer circumferential surface at the middle section of the connecting shaft is provided with a threaded surface, and the threaded surface corresponds to the position of the adjustment component.

6. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that The adjusting assembly includes a rotating pipe, a bearing seat, an adjusting nut and a first compression spring. The bearing seat is rotatably mounted on the rotating pipe, and the bearing seat is arranged in the mounting groove of the front end cover and is controlled by a locking bolt. An adjusting nut is provided at the front end of the rotating pipe, and the rotating pipe is sleeved on the connecting shaft, and the adjusting nut is arranged on the threaded surface. A first compression spring is provided at the rear end of the rotating pipe, and the first compression spring is supported between the rotating pipe and the connecting sleeve.

7. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that The front side of the fixed circular plate is fixed with a mounting frame by means of locking bolts, the front side of the mounting frame is provided with a limiting groove, and the connecting sleeve is located in the middle of the limiting groove, and the left and right sides of the mounting frame are provided with spline sleeves, and the two spline sleeves are distributed in a symmetrical manner.

8. The three-phase driving motor capable of rapid parking according to claim 1, It is characterized in that A telescopic rod is provided at the top position on the inner side relative to the two adjustment frames, and the telescopic rod slides through the limiting through hole, a spline shaft is provided at the inner end portion relative to the two telescopic rods, and the spline shaft slides through the spline sleeve, a support frame is provided at the inner end portion relative to the two spline shafts, and the support frame is located in the limiting groove, two rotating rollers are rotatably installed on the support frame, and the two rotating rollers are distributed in an upper and lower parallel manner, and the rotating rollers are rollingly connected to the connecting sleeve, a second compression spring is mounted on the spline shaft, and the second compression spring is supported between the mounting frame and the support frame.

9. The three-phase driving motor capable of rapid parking according to claim 8, It is characterized in that The adjustment frame is provided with limit sliders on the front and rear sides of the bottom end, and the two limit sliders are distributed in a symmetrical manner. The two adjustment frames are provided with mounting plates on the inner sides relatively to the bottom ends, and the two mounting plates are distributed in parallel up and down. Tooth plates are provided at the middle positions relatively to the inner sides of the two mounting plates, and the two tooth plates are distributed in a symmetrical manner up and down.

10. The three-phase driving motor capable of rapid parking according to claim 1, Features , A connecting frame is provided at the middle position of the top of the guide frame, and the connecting frame is connected to the front end cover, two limiting slide grooves are provided on the inner wall of the through groove of the guide frame, and the adjustment frame is slidably connected to the limiting slide grooves through a limiting slider, a micro motor is provided at the middle position of the rear part of the guide frame, a rotating shaft rod is provided at the end of the rotating shaft of the micro motor, and the rotating shaft rod is rotatably connected to the guide frame through a bearing, and the rotating shaft rod is located between the two mounting plates, a gear is provided on the rotating shaft rod, and the gear is meshed with the gear plate.

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