A protection mechanism for the output shaft of an electric motor

Abstract

The present invention relates to the technical field of motors, and specifically to a protection mechanism for the output shaft of a motor, which includes a motor body. A monitoring module is arranged outside the output shaft of the motor body. The monitoring module includes an oil storage box, an abutting structure, an oil delivery structure, and an oil drainage structure installed on an installation structure. The installation structure includes an installation shell, and a through hole, an installation groove, and a sliding port are formed inside the installation shell; among them, the abutting structure is located outside the installation structure, a first transmission structure is installed between the abutting structure and the oil storage box, and a second transmission structure is installed between the abutting structure and the oil delivery structure; the abutting structure includes a vertically installed plate and an abutting block that can be detachably installed. The abutting block is located outside the output shaft of the motor body, and a pressure pad for monitoring the motor body is installed inside the abutting block. The present invention realizes the functions of real-time monitoring, automatic lubrication, and oil drainage of the motor through ingenious mechanical design, and has the advantages of simple structure, strong reliability, and strong adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and specifically to a protection mechanism for the output shaft of a motor. Background Art

[0002] A motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by a current-carrying coil and acts on the rotor to form a magnetoelectric driving rotational torque. A motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying wire in a magnetic field is related to the current direction and the magnetic induction line direction; the motor shaft is a cylindrical object that passes through the middle of a bearing, or the middle of a wheel, or the middle of a gear, but there are also a small number of square-shaped ones. The shaft is a mechanical part that supports rotating parts and rotates with them to transmit motion, torque, or bending moment, and is generally a metal round rod. When the shaft contacts the transmission structure, a certain frictional force will be generated, and appropriate lubricating oil needs to be added to reduce the friction coefficient on the circumferential side of the bearing, thereby increasing the service life of the bearing.

[0003] Chinese Patent Publication No. CN218335607U discloses a wear-resistant self-lubricating motor output shaft, including a machine shell. One side of the machine shell is fixedly connected with an end cover. One side of the end cover is provided with a bearing. The inner wall of the bearing is provided with a rotating shaft. The outer surface of the rotating shaft is sleeved with a lubricating seat. The inner part of the lubricating seat is provided with a first lubricating cavity. The outer surface of the lubricating seat is fixedly connected with an oil storage seat. The inner part of the oil storage seat is provided with an oil storage cavity. This application can lubricate the rotating shaft by installing a new driving source.

[0004] However, the above patent still has the following defects: For example, to lubricate the rotating shaft, it is necessary for the staff to drive a new driving source to achieve it. Installing a new driving source means additional equipment purchase costs, and at the same time, it is also necessary to consider the installation, debugging, and subsequent maintenance costs of the driving source. Moreover, this lubrication method depends on the regular operation of the staff. If the staff forgets to start or operates improperly, it may lead to problems such as insufficient lubrication or untimely lubrication.

[0005] Therefore, it is urgent to improve the above patent to solve the above existing problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a protection mechanism for the output shaft of a motor, which realizes real-time monitoring, automatic lubrication, and oil drainage functions of the motor through a clever mechanical design, and has the advantages of simple structure, strong reliability, strong adaptability, energy conservation, and environmental protection.

[0007] To achieve the above object, the main technical solutions adopted by the present invention include: a motor body, a monitoring module is provided outside the output shaft of the motor body, the monitoring module includes an oil storage box, a contact structure, an oil delivery structure and an oil drainage structure installed on an installation structure, the installation structure includes an installation shell, and a through hole, an installation groove and a sliding opening are formed inside the installation shell;

[0008] Among them, the contact structure is located outside the installation structure, a first transmission structure is installed between the contact structure and the oil storage box, and a second transmission structure is installed between the contact structure and the oil delivery structure;

[0009] The contact structure includes a vertically arranged plate and a contact block that are detachably installed. The contact block is located outside the output shaft of the motor body, and a pressure pad for monitoring the motor body is installed inside the contact block. The contact structure drives the vertically arranged plate to reciprocate by fitting the contact block with the vibration of the motor body;

[0010] A linkage structure is installed between the contact structure and the oil drainage structure. The oil drainage structure realizes the oil drainage work through the reciprocating motion of the linkage structure and the contact structure.

[0011] Preferably, a screw rod is fixed on the upper surface of the contact block, and the screw rod is threadedly connected with the vertically arranged plate. The oil storage box is fixed inside the installation shell. A stirring rod extending outside the installation shell is installed in the oil storage box through a bearing, and the stirring rod is connected with the first transmission structure and realizes stirring through the reciprocation of the contact structure.

[0012] Preferably, the first transmission structure includes a connecting block fixed on the outer surface of the stirring rod and a connecting plate fixed on the top side of the vertically arranged plate and slidably matched with the connecting block. A first connecting shaft is fixed on the top side of the connecting plate, and the other end of the first connecting shaft is installed through a bearing with a first roller extending into the connecting block.

[0013] Preferably, a first sliding groove adapted to the first roller is formed inside the connecting block. The outer shape of the connecting block is arc-shaped, and a pressure monitoring sensor block is detachably installed inside the pressure pad. An extension plate that can extend outside the contact block is slidably installed inside the contact block, and an adjusting rod inserted into the extension plate is installed inside the contact block.

[0014] Preferably, the oil delivery structure includes a pump housing and a valve pipe that are fixedly communicated. Among them, a diaphragm is fixed inside the pump housing, and two valve plates for cooperating with the diaphragm to bulge are elastically hinged and installed inside the valve pipe. Communication pipes are fixedly connected to both the upper and lower ends of the valve pipe. The pump housing and the valve pipe are both fixed in the installation groove.

[0015] Preferably, the upper communication pipe is fixedly communicated with the lower surface of the oil storage box. A valve rod extending outside the pump housing is fixed on the outer surface of the diaphragm, and a second connecting shaft connected with the second transmission structure is installed on the outer surface of the valve rod.

[0016] Preferably, the second transmission structure includes a sliding seat fixed to the outer surface of the vertical plate. A second sliding groove is formed inside the sliding seat and is inclined. A second roller is rotatably connected inside the second sliding groove. One end of the second connecting shaft away from the valve stem is connected to the second roller by a bearing. The sliding seat penetrates through the sliding opening and extends into the installation shell.

[0017] Preferably, the oil drainage structure includes a material receiving box fixed to the inner wall of the installation groove and an oil storage cotton detachably installed inside the material receiving box. A butt joint pipe is fixedly connected between the bottom communication pipe and the oil drainage structure. An oil drainage hole communicating with the through hole is formed inside the material receiving box.

[0018] Preferably, the linkage structure includes a connecting arm fixed to the outer surface of the vertical plate and penetrating through the sliding opening and extending into the installation shell, a collar welded to the other end of the connecting arm and sleeved on the outer surface of the bottom communication pipe, and a guiding member fixed to the top side of the butt joint pipe and penetrating through the connecting arm. A shock-absorbing pad is fixed inside the collar.

[0019] The guiding member includes a guide rod and a spring fixed to the top side of the butt joint pipe. The top side of the spring is fixed to the lower surface of the collar, and the guide rod penetrates through the inside of the connecting arm.

[0020] Preferably, the linkage structure further includes a push rod fixed to the lower surface of the connecting arm and extending into the material receiving box. A pressing block located above the oil storage cotton is fixed to the bottom end of the push rod.

[0021] The present invention has at least the following beneficial effects:

[0022] 1. For the protection mechanism of the motor output shaft, the vibration state of the motor is monitored in real time through the abutting block and the pressure pad, and the abnormality is responded to in time, improving the safety of the equipment. Using the vibration of the motor as the power source, the lubricating oil is automatically stirred and pumped, reducing manual intervention and improving work efficiency. The automatic oil drainage mechanism ensures the renewal and circulation of the lubricating oil, maintaining the good lubrication state of the equipment.

[0023] 2. For the protection mechanism of the motor output shaft, a mechanical transmission structure is adopted, without the need for a power or pneumatic source, simplifying the equipment structure and improving reliability. The functions are realized through simple connection and transmission between components, which is easy to maintain and replace. The position of the abutting block and the sensitivity of the pressure pad can be adjusted according to the different models and vibration characteristics of the motor, with strong adaptability.

[0024] 3. For the protection mechanism of the motor output shaft, the abutting structure and its linkage design with related components realize functions such as real-time monitoring of the motor, automatic stirring lubrication, and automatic oil drainage maintenance of the motor, with the advantages of simple structure, high reliability, strong adaptability, and convenient maintenance.

[0025] 4. The protection mechanism for the output shaft of the motor realizes the automatic linkage between the abutting structure and the oil delivery structure through the design of the second transmission structure. When the motor body vibrates, the vertical plate of the abutting structure will reciprocate. This movement is transmitted through the sliding seat, the second chute, and the second roller, and finally converted into the agitation of the diaphragm. This process requires no manual intervention, realizes the automatic delivery of lubricating oil, and improves the automation degree and working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0027] Figure 1 is a three-dimensional view of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the overall structure of the monitoring module of the present invention;

[0029] Figure 3 is a sectional view of the structure of the mounting shell of the present invention;

[0030] Figure 4 is a schematic diagram of a partial structure of the monitoring module of the present invention;

[0031] Figure 5 is a schematic diagram of the structures of the abutting structure and the second transmission structure of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the first transmission structure of the present invention;

[0033] Figure 7 is a schematic diagram of the structure of the oil delivery structure of the present invention;

[0034] Figure 8 is a sectional view of the overall structure of the oil delivery structure of the present invention;

[0035] Figure 9 of the present invention Figure 3 is an enlarged schematic diagram of the structure of A shown;

[0036] Figure 10 is a sectional view of the structure of the oil drainage structure of the present invention.

[0037] In the figure, 1 is the motor body; 2 is the monitoring module; 3 is the mounting structure; 301 is the mounting shell; 302 is the perforation; 303 is the mounting groove; 304 is the sliding opening; 4 is the oil storage box; 41 is the stirring rod; 5 is the abutting structure; 501 is the vertical plate; 502 is the screw rod; 503 is the abutting block; 504 is the pressure pad; 505 is the extension plate; 506 is the adjusting rod; 6 is the first transmission structure; 601 is the connecting block; 602 is the connecting plate; 603 is the first connecting shaft; 604 is the first roller; 605 is the first sliding groove; 7 is the oil delivery structure; 701 is the pump housing; 702 is the valve pipe; 703 is the diaphragm; 704 is the valve rod; 705 is the second connecting shaft; 706 is the valve plate; 707 is the connecting pipe; 708 is the docking pipe; 8 is the oil drainage structure; 801 is the receiving box; 802 is the oil storage cotton; 803 is the oil drainage hole; 9 is the linkage structure; 901 is the connecting arm; 902 is the collar; 903 is the shock guide pad; 904 is the guide rod; 905 is the spring; 906 is the push rod; 907 is the pressing block; 10 is the second transmission structure; 1001 is the sliding seat; 1002 is the second sliding groove; 1003 is the second roller. Detailed implementation mode

[0038] The following will cooperate with the drawings and embodiments to elaborate on the implementation mode of the present application in detail, so as to fully understand the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects and implement accordingly.

[0039] As Figures 1 - 10 shown, the motor output shaft protection mechanism provided in this embodiment includes a motor body 1. A monitoring module 2 is arranged outside the output shaft of the motor body 1. The monitoring module 2 includes an oil storage box 4, an abutting structure 5, an oil delivery structure 7 and an oil drainage structure 8 mounted on a mounting structure 3. The mounting structure 3 includes a mounting shell 301. A perforation 302, a mounting groove 303 and a sliding opening 304 are formed inside the mounting shell 301; the number of mounting shells 301 is two, and the two mounting shells 301 are bolt-mounted. An oil inlet hole is formed in the oil storage box 4. Specifically, one of the mounting shells 301 is provided with an oil delivery pipe communicated with the oil inlet hole. The abutting structure 5 is located outside the mounting structure 3. A first transmission structure 6 is mounted between the abutting structure 5 and the oil storage box 4, and a second transmission structure 10 is mounted between the abutting structure 5 and the oil delivery structure 7; as Figures 2 - 5 shown, the abutting structure 5 includes a vertically arranged plate 501 and an abutting block 503 that are detachably mounted. The abutting block 503 is located outside the output shaft of the motor body 1, and a pressure pad 504 for monitoring the motor body 1 is mounted inside the abutting block 503. The abutting structure 5 drives the vertically arranged plate 501 to reciprocate by fitting with the abutting block 503 by means of the vibration of the motor body 1. It should be noted that a guiding structure for guiding the vertically arranged plate 501 is mounted on the outer surface of the mounting shell 301 to enable it to move linearly and stably.

[0040] Specifically, as Figures 4 - 6As shown, a screw rod 502 is fixed to the upper surface of the abutting block 503, and the screw rod 502 is in threaded connection with the vertical plate 501. The oil storage box 4 is fixed inside the installation shell 301. A stirring rod 41 extending to the outside of the installation shell 301 is installed in the oil storage box 4 through a bearing, and the stirring rod 41 is connected to the first transmission structure 6 and realizes stirring through the reciprocation of the abutting structure 5. To activate the lubricating oil in the oil storage box 4, the reciprocating motion of the abutting structure 5 is transmitted to the stirring rod 41 through the first transmission structure 6, realizing automatic stirring of the lubricating oil in the oil storage box 4. This helps to maintain the uniformity and fluidity of the lubricating oil, ensure good lubrication of the motor, and reduce wear and failures.

[0041] As Figures 2 - 4 and Figure 6 shown, the first transmission structure 6 includes a connection block 601 fixed to the outer surface of the stirring rod 41 and a connection plate 602 fixed to the top side of the vertical plate 501 and slidably matched with the connection block 601. A first connecting shaft 603 is fixed to the top side of the connection plate 602, and the other end of the first connecting shaft 603 is installed through a bearing with a first roller 604 extending into the connection block 601. Among them, a first sliding groove 605 adapted to the first roller 604 is formed inside the connection block 601. The abutting block 503 is arc-shaped, and a pressure monitoring sensing block is detachably installed inside the pressure pad 504. The abutting block 503 is located outside the output shaft of the motor body 1 and is equipped with a pressure pad 504, which can directly monitor the vibration and abnormal conditions of the motor. When the motor has abnormal vibration, the abutting block 503 will move accordingly, driving the vertical plate 501 to reciprocate through the screw rod 502, thereby quickly triggering subsequent protection or monitoring mechanisms. An extension plate 505 that can extend to the outside of the abutting block 503 is slidably installed inside the abutting block 503, and an adjusting rod 506 inserted into the extension plate 505 is installed inside the abutting block 503. When the extension plate 505 extends out of the abutting block 503, it is fixed through the adjusting rod 506, and the outer shape of the extension plate 505 is adapted to the abutting block 503. The design of the extension plate 505 and the adjusting rod 506 enables the abutting block 503 to be adjusted according to requirements and vibration characteristics. By extending and fixing the extension plate 505, it can be ensured that the abutting block 503 maintains good contact with the motor body 1, thereby improving the accuracy and reliability of vibration monitoring. It should be noted that the screw rod 502 is connected to the vertical plate 501. When the output shaft of the motor vibrates, the movement of the abutting block 503 is transmitted to the vertical plate 501 through the screw rod 502, causing the vertical plate 501 to also reciprocate.

[0042] To achieve automatic oil delivery, as Figure 3 , Figure 4 , Figures 7 - 9As shown in the figure, the oil delivery structure 7 includes a pump housing 701 and a valve pipe 702 that are fixedly connected. Among them, a diaphragm 703 is fixedly installed inside the pump housing 701, and two valve plates 706 for cooperating with the diaphragm 703 to bulge are elastically hinged and installed inside the valve pipe 702. Both upper and lower ends of the valve pipe 702 are fixedly connected with connecting pipes 707. The pump housing 701 and the valve pipe 702 are both fixedly installed in the installation groove 303. Among them, the top connecting pipe 707 is fixedly connected with the lower surface of the oil storage box 4. A valve rod 704 extending outside the pump housing 701 is fixedly installed on the outer surface of the diaphragm 703, and a second connecting shaft 705 connected to the second transmission structure 10 is installed on the outer surface of the valve rod 704. To realize the linkage between the oil delivery structure 7 and the abutting structure 5, as Figure 4 and Figure 5 shown, the second transmission structure 10 includes a sliding seat 1001 fixedly installed on the outer surface of the vertical plate 501. A second sliding groove 1002 is opened inside the sliding seat 1001, and the second sliding groove 1002 is inclined. A second roller 1003 that is rollingly connected inside the second sliding groove 1002. One end of the second connecting shaft 705 away from the valve rod 704 is connected to the second roller 1003 by a bearing. The sliding seat 1001 extends through the sliding opening 304 to the inside of the installation shell 301. Through the design of the second transmission structure 10, the automatic linkage between the abutting structure 5 and the oil delivery structure 7 is realized. When the motor body 1 vibrates, the vertical plate 501 of the abutting structure 5 will reciprocate. This movement is transmitted through the sliding seat 1001, the second sliding groove 1002 and the second roller 1003, and finally converted into the bulging of the diaphragm 703. This process does not require manual intervention, realizing the automatic delivery of lubricating oil and improving the automation degree and working efficiency of the device.

[0043] In addition, by adjusting the parameters of the second transmission structure 10 (such as the inclination angle of the second sliding groove 1002, the size of the second roller 1003, etc.), it is possible to adapt to the motor output shaft protection mechanisms of different models and specifications. This design makes the device have strong adaptability and flexibility and can be applied to a variety of different motor protection scenarios.

[0044] As Figures 7 - 10 shown, the oil drainage structure 8 includes a material receiving box 801 fixedly installed on the inner wall of the installation groove 303 and an oil storage cotton 802 detachably installed inside the material receiving box 801. A docking pipe 708 is fixedly connected between the bottom connecting pipe 707 and the oil drainage structure 8. An oil drainage hole 803 communicating with the through hole 302 is opened inside the material receiving box 801. A linkage structure 9 is installed between the abutting structure 5 and the oil drainage structure 8. The oil drainage structure 8 realizes the oil drainage work through the reciprocating movement of the linkage structure 9 and the abutting structure 5. The reciprocating movement of the abutting structure 5 is also transmitted to the oil drainage structure 8 through the linkage structure 9 to realize the automatic oil drainage of the lubricating oil. This helps to regularly replace or update the lubricating oil, keep the motor clean and operate efficiently, and reduce the maintenance cost and workload. As Figure 3 、 Figure 9 andFigure 10 As shown in the figure, the linkage structure 9 includes a connecting arm 901 fixed to the outer surface of the vertical plate 501 and extending into the interior of the mounting shell 301 through the sliding port 304, a collar 902 welded to the other end of the connecting arm 901 and sleeved on the outer surface of the bottom connecting pipe 707, and a guiding member fixed to the top side of the docking pipe 708 and passing through the connecting arm 901. A shock-absorbing pad 903 is fixed to the inner side of the collar 902. Specifically, the linkage structure 9 further includes a push rod 906 fixed to the lower surface of the connecting arm 901 and extending into the interior of the material receiving box 801. A pressing block 907 located above the oil storage cotton 802 is fixed to the bottom end of the push rod 906.

[0045] As Figure 9 and Figure 10 shown in the figure, among them, the guiding member includes a guide rod 904 and a spring 905 fixed to the top side of the docking pipe 708. The top side of the spring 905 is fixed to the lower surface of the collar 902, and the guide rod 904 passes through the interior of the connecting arm 901. The number of guiding members is two, and the two guiding members are symmetrically arranged. The collar 902 is sleeved on the outer surface of the bottom connecting pipe 707 and contacts the connecting pipe 707 through the shock-absorbing pad 903. This design can effectively transmit the vibration of the abutting structure 5 while reducing friction and wear during the transmission process. The guide rod 904 passes through the connecting arm 901, providing a stable guiding effect for the connecting arm 901 and ensuring the accuracy and reliability of the transmission. The addition of the spring 905 enables the linkage structure 9 to have a certain buffering capacity, capable of absorbing part of the vibration energy and further improving the stability of the transmission.

[0046] As Figures 1 - 10 shown in the figure, the principle of the motor output shaft protection mechanism provided in this embodiment is as follows:

[0047] When the motor body 1 is in a stationary or normal operating state, the abutting block 503 in the abutting structure 5 maintains a certain distance from the output shaft of the motor body 1 but does not contact or is in a slightly contacting state, which does not affect the normal operation of the motor. The oil storage box 4 is filled with lubricating oil, the stirring rod 41 is stationary, the diaphragm 703 of the oil delivery structure 7 is in the initial position, and the valve plate 706 in the valve pipe 702 remains in the closed state;

[0048] When the motor body 1 vibrates or malfunctions, the abutting block 503 is affected by the vibration and starts to reciprocate. The movement of the abutting block 503 is transmitted to the vertical plate 501 through the screw rod 502, causing the vertical plate 501 to also reciprocate. The movement of the vertical plate 501 drives the first roller 604 to slide in the first chute 605 through the connecting plate 602 and the first connecting shaft 603. The sliding of the first roller 604 is converted into the reciprocating rotational movement of the stirring rod 41, thereby stirring the lubricating oil in the oil storage box 4. The movement of the vertical plate 501 also drives the second roller 1003 to roll through the sliding seat 1001 and the second chute 1002. The rolling of the second roller 1003 drives the valve rod 704 to move up and down through the second connecting shaft 705, causing the diaphragm 703 to pulsate in the pump housing 701. The pulsation of the diaphragm 703 causes the valve plate 706 in the valve pipe 702 to open and close alternately, thereby pumping the lubricating oil in the oil storage box 4 into the docking pipe 708 through the connecting pipe 707;

[0049] The movement of the vertical plate 501 drives the collar 902 and the shock-absorbing pad 903 to move up and down through the connecting arm 901. The movement of the collar 902 is stabilized by the guide rod 904 and the spring 905 of the guiding member and transmitted to the docking pipe 708, but the main function is to link the push rod 906. The up and down movement of the push rod 906 drives the pressing block 907 to press the oil storage cotton 802, squeezing the lubricating oil out of the oil storage cotton 802 and discharging it through the oil discharge hole 803. The discharged lubricating oil is discharged from the oil discharge hole 803 into the material receiving box 801 to lubricate the motor body 1.

[0050] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but rather use the difference in functions of components as the criterion for distinction. As used throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effect.

Claims

1. A protection mechanism for the output shaft of a motor, comprising a motor body (1), characterized in that, Outside the output shaft of the motor body (1), a monitoring module (2) is provided. The monitoring module (2) includes an oil storage box (4), a contact structure (5), an oil delivery structure (7), and an oil drainage structure (8) installed on an installation structure (3). The installation structure (3) includes an installation shell (301), and a through hole (302), an installation groove (303), and a sliding opening (304) are formed inside the installation shell (301); Among them, the contact structure (5) is located outside the installation structure (3). A first transmission structure (6) is installed between the contact structure (5) and the oil storage box (4), and a second transmission structure (10) is installed between the contact structure (5) and the oil delivery structure (7); The contact structure (5) includes a vertically installed plate (501) and a contact block (503) that are detachably installed. The contact block (503) is located outside the output shaft of the motor body (1), and a pressure pad (504) for monitoring the motor body (1) is installed inside the contact block (503). The contact structure (5) drives the vertically installed plate (501) to reciprocate by fitting with the contact block (503) due to the vibration of the motor body (1); A linkage structure (9) is installed between the contact structure (5) and the oil drainage structure (8). The oil drainage structure (8) realizes the oil drainage work through the reciprocating movement of the linkage structure (9) and the contact structure (5); The oil delivery structure (7) includes a pump shell (701) and a valve pipe (702) that are fixedly connected. Among them, a diaphragm (703) is fixed inside the pump shell (701), and two valve plates (706) for cooperating with the diaphragm (703) to bulge are elastically hinged and installed inside the valve pipe (702). Both the upper and lower ends of the valve pipe (702) are fixedly connected with a communicating pipe (707). The pump shell (701) and the valve pipe (702) are both fixed in the installation groove (303); The upper communicating pipe (707) is fixedly connected to the lower surface of the oil storage box (4). The outer surface of the diaphragm (703) is fixed with a valve rod (704) extending outside the pump shell (701), and a second connecting shaft (705) connected to the second transmission structure (10) is installed on the outer surface of the valve rod (704).

2. The protection mechanism for the output shaft of an electric motor according to claim 1, characterized in that: A screw rod (502) is fixed on the upper surface of the contact block (503), and the screw rod (502) is threadedly connected to the vertically installed plate (501). The oil storage box (4) is fixed inside the installation shell (301). A stirring rod (41) extending outside the installation shell (301) is installed in the oil storage box (4) through a bearing, and the stirring rod (41) is connected to the first transmission structure (6) and realizes stirring through the reciprocation of the contact structure (5).

3. The protection mechanism for the output shaft of an electric motor according to claim 2, characterized in that: The first transmission structure (6) includes a connecting block (601) fixed on the outer surface of the stirring rod (41) and a connecting plate (602) fixed on the top side of the vertically installed plate (501) and slidably matched with the connecting block (601). A first connecting shaft (603) is fixed on the top side of the connecting plate (602), and the other end of the first connecting shaft (603) is installed in the connecting block (601) through a bearing with a first roller (604).

4. A protection mechanism for the output shaft of a motor according to claim 3, characterized in that: The connecting block (601) is internally provided with a first chute (605) adapted to the first roller (604). The abutting block (503) has an arc-shaped outer shape, and a pressure monitoring sensor block is detachably installed inside the pressure pad (504). An extension plate (505) that can extend outside thereof is slidably installed inside the abutting block (503), and an adjusting rod (506) inserted into the extension plate (505) is installed inside the abutting block (503).

5. The protection mechanism for the output shaft of an electric motor according to claim 4, characterized in that: The second transmission structure (10) includes a sliding seat (1001) fixed to the outer surface of the vertical plate (501). A second chute (1002) is provided inside the sliding seat (1001), and the second chute (1002) is inclined. A second roller (1003) is rotatably connected inside the second chute (1002). One end of the second connecting shaft (705) away from the valve stem (704) is connected to the second roller (1003) by a bearing. The sliding seat (1001) extends through the sliding opening (304) into the installation shell (301).

6. The protection mechanism for the output shaft of an electric motor according to claim 1, characterized in that: The oil drainage structure (8) includes a material receiving box (801) fixed to the inner wall of the installation groove (303) and an oil storage cotton (802) detachably installed inside the material receiving box (801). A butt joint pipe (708) is fixedly connected between the bottom communication pipe (707) and the oil drainage structure (8). An oil drainage hole (803) communicating with the through hole (302) is provided inside the material receiving box (801).

7. The protection mechanism for the output shaft of an electric motor according to claim 6, characterized in that: The linkage structure (9) includes a connecting arm (901) fixed to the outer surface of the vertical plate (501) and extending into the installation shell (301) through the sliding opening (304), a collar (902) welded to the other end of the connecting arm (901) and sleeved on the outer surface of the bottom communication pipe (707), and a guiding member fixed to the top side of the butt joint pipe (708) and passing through the connecting arm (901). A shock-absorbing pad (903) is fixed to the inner side of the collar (902). The guiding member includes a guide rod (904) and a spring (905) fixed to the top side of the butt joint pipe (708). The top side of the spring (905) is fixed to the lower surface of the collar (902), and the guide rod (904) passes through the inside of the connecting arm (901).

8. A protection mechanism for a motor output shaft according to claim 7, characterized in that: The linkage structure (9) further includes a push rod (906) fixed to the lower surface of the connecting arm (901) and extending into the material receiving box (801). A pressing block (907) located above the oil storage cotton (802) is fixed to the bottom end of the push rod (906).

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