Motor shaft seal

Abstract

The present invention provides a motor shaft seal, comprising: a housing having a first escape hole for evading the motor shaft; a housing having a storage space connected to the first escape hole; a first conductive structure movably disposed on the housing and conductively connected to the housing, and located within the storage space; the first conductive structure having a first conductive state in contact with the motor shaft and a first separated state in which the first conductive structure is separated from the motor shaft; a first electromagnet disposed on the first conductive structure so that when current flows through the motor shaft, the first conductive structure switches from the first separated state to the first conductive state; a second electromagnet disposed opposite the first electromagnet and located on either side of the motor shaft; a first elastic return member disposed between the first conductive structure and the inner wall of the housing to maintain the first conductive structure in the first separated state; and a conductive wire disposed on the outer wall of the housing. The technical solution of this application effectively solves the problem of motor shaft deviation.

Description

Technical Field

[0001] The present invention relates to the technical field of motor shaft seals, and in particular to a motor shaft seal. Background Art

[0002] The motor shaft seal is a friction seal or stuffing box used to prevent liquid leakage between the shaft and bearing of the compressor or other fluid conveying equipment. It is also a sealing device set to prevent leakage between the pump shaft and the housing. Common shaft seal types include packing seals, mechanical seals and power seals.

[0003] When the motor is running, the drive shaft will generate current interference, causing the motor's drive shaft to deviate. The existing motor shaft seal is made of rubber material and cannot conduct the current, causing the motor's drive shaft to rub against the shaft seal for a long time, causing damage to the motor's drive shaft. Summary of the Invention

[0004] The main purpose of the present invention is to provide a motor shaft seal to solve the problem of motor shaft deviation in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a motor shaft seal is provided, comprising: a shell, a first avoidance through hole is provided on the shell for avoiding the motor shaft, and an accommodating space connected to the first avoidance through hole is provided in the shell; a first conductive structure, the first conductive structure is movably provided on the shell and conductively connected to the shell, the first conductive structure is located in the accommodating space, the first conductive structure has a first conductive state abutting against the motor shaft and a first separated state separated from the motor shaft; a first electromagnet, the first electromagnet is provided on the first conductive structure, so that when current flows through the motor shaft, the first conductive structure switches from the first separated state to the first conductive state; a second electromagnet, the second electromagnet is provided opposite to the first electromagnet, and the second electromagnet and the first electromagnet are respectively located on both sides of the motor shaft; a first elastic reset member, the first elastic reset member is provided between the first conductive structure and the inner wall of the shell, so that the first conductive structure remains in the first separated state; a conductive wire, the conductive wire is provided on the outer wall of the shell.

[0006] Furthermore, the first conductive structure includes a mounting seat and a push piece. The mounting seat is movably arranged on the shell in a direction perpendicular to the axis of the first avoidance through hole and cooperates with the shell guide. The first elastic reset piece is arranged between the mounting seat and the inner wall of the shell. The first end of the push piece is connected to the mounting seat. The first electromagnet is arranged at the second end of the push piece. When the first conductive structure is in the first conductive state, the second end of the push piece abuts against the motor shaft.

[0007] Furthermore, the resisting member includes a connecting rod and a resisting ball, the first end of the connecting rod is connected to the mounting seat, the second end of the connecting rod is provided with a concave cavity, the first electromagnet is provided at the second end of the connecting rod, and the resisting ball is movably provided in the concave cavity.

[0008] Furthermore, the mounting seat includes a seat body and a slider connected to the seat body, the first elastic reset member is arranged between the seat body and the inner wall of the shell, a slide groove is provided on the end wall of the shell, the slider is movably arranged in the slide groove, and the first end of the connecting rod is connected to the seat body.

[0009] Furthermore, a stop plate is provided on the shell, the stop plate is arranged at the notch of the slide groove, and an avoidance groove is provided on the slider, and the stop plate and the avoidance groove are arranged correspondingly.

[0010] Furthermore, the first conductive structure also includes a sliding rod, a second avoidance through hole is provided on the side wall of the shell, the first end of the sliding rod is connected to the first end of the connecting rod, the middle part of the sliding rod is passed through the second avoidance through hole, the second end of the sliding rod is located outside the shell, and the first elastic reset part is sleeved on the outer periphery of the sliding rod.

[0011] Furthermore, a third avoidance through hole is provided on the seat body, and the slide rod is passed through the third avoidance through hole. The first conductive structure also includes a first threaded sleeve, which is threadedly engaged with the connecting rod. The first threaded sleeve and the slide rod are respectively located on both sides of the seat body.

[0012] Furthermore, the sliding rod includes a rod body and a cylinder body arranged at a first end of the rod body, the second end of the rod body is located outside the shell, and the first end of the connecting rod is threadedly engaged with the cylinder body.

[0013] Furthermore, the first conductive structure also includes a second threaded sleeve, which is arranged outside the shell and is threadably matched with the second end of the rod body.

[0014] The motor shaft seal further includes: a second conductive structure movably disposed on the housing and located within the accommodation space, the second conductive structure having a second conductive state in contact with the motor shaft and a second separated state in contact with the motor shaft; and a second elastic return member disposed between the second conductive structure and the inner wall of the housing to maintain the second conductive structure in the second separated state. A second electromagnet is disposed on the second conductive structure to maintain the second conductive state when current flows through the motor shaft.

[0015] According to the technical solution of the present invention, a motor shaft seal includes a housing, a first conductive structure, a first electromagnet, a second electromagnet, a first elastic return member, and a conductive wire disposed on the outer wall of the housing. The housing is provided with a first clearance hole for clearing the motor shaft. The housing is provided with a storage space that is connected to the first clearance hole. The first conductive structure is movably disposed on the housing and is electrically connected to the housing. The first conductive structure has a first conductive state and a first separated state. When the first conductive structure is in the first conductive state, it abuts the motor shaft. When the first conductive structure is in the first separated state, it is separated from the motor shaft. The first electromagnet is disposed on the first conductive structure. When the first electromagnet causes current to flow through the motor shaft, the first conductive structure switches from the first separated state to the first conductive state. The second electromagnet is disposed opposite the first electromagnet, with the first and second electromagnets located on either side of the motor shaft. The first elastic return member is disposed between the first conductive structure and the inner wall of the housing to maintain the first conductive structure in the first separated state. This arrangement enables the housing to support the first conductive structure, the first electromagnet, the second electromagnet, and the first elastic return member. When the motor shaft rotates, an interference current will be generated on the motor shaft, which will cause the first electromagnet and the second electromagnet to generate a magnetic force, and then under the mutual attraction of the first electromagnet and the second electromagnet, the first electromagnet can move in the direction close to the second electromagnet, and then the first conductive structure can abut the motor shaft, so that the current on the motor shaft can be conducted to the housing through the first conductive structure, and then conducted to the conductive line through the housing, realizing the derivation of the current, thereby preventing the motor shaft from deviating, solving the problem that the motor shaft deviates and causes the motor shaft to rub against the motor shaft seal for a long time, causing damage to the motor shaft, and improving the service life of the motor shaft. When the first electromagnet moves, it can drive the first elastic reset member to move, so that the first elastic reset member can have elastic potential energy, so that after there is no current in the motor shaft, the first elastic reset member can drive the first electromagnet to move in the direction away from the second electromagnet, so that the first conductive structure remains in the first separation state. Therefore, the technical solution of the present application effectively solves the problem of motor shaft deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a motor shaft seal according to the present invention is shown;

[0018] Figure 2 Shown Figure 1 A schematic diagram of the three-dimensional structure of the motor shaft seal housing;

[0019] Figure 3 Shown Figure 1 Schematic cross-sectional view of the motor shaft seal;

[0020] Figure 4 Shown Figure 1 A schematic diagram of the three-dimensional structure of the motor shaft seal seat;

[0021] Figure 5 Shown Figure 1 Schematic diagram of the three-dimensional structure of the motor shaft seal housing.

[0022] The above drawings include the following reference numerals:

[0023] 1. Motor shaft; 10. Housing; 11. First avoidance hole; 12. Accommodating space; 13. Slide groove; 14. Stop plate; 15. Second avoidance hole; 20. First conductive structure; 21. Mounting seat; 211. Seat body; 2111. Third avoidance hole; 212. Slider; 2121. Avoidance groove; 22. Pushing member; 221. Connecting rod; 222. Pushing ball; 23. Slide rod; 231. Rod body; 232. Cylinder body; 24. First threaded sleeve; 25. Second threaded sleeve; 30. First electromagnet; 40. Second electromagnet; 50. First elastic reset member; 60. Conducting wire; 70. Second conductive structure; 80. Second elastic reset member; 90. Transmission structure; 91. First connecting rod; 92. Second connecting rod. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0027] like Figures 1 to 3 As shown, the motor shaft seal in this embodiment includes: a housing 10, a first conductive structure 20, a first electromagnet 30, a second electromagnet 40, a first elastic return member 50, and a conductive wire 60. The housing 10 is provided with a first avoidance through-hole 11 for avoiding the motor shaft 1. The housing 10 is provided with a storage space 12 connected to the first avoidance through-hole 11. The first conductive structure 20 is movably disposed on the housing 10 and is electrically connected to the housing 10. The first conductive structure 20 is located in the storage space 12. The first conductive structure 20 has a first conductive state in contact with the motor shaft 1 and a first separated state separated from the motor shaft 1. The first electromagnet 30 is disposed on the first conductive structure 20 so that when current flows through the motor shaft 1, the first conductive structure 20 switches from the first separated state to the first conductive state. The second electromagnet 40 is disposed opposite the first electromagnet 30, and the second electromagnet 40 and the first electromagnet 30 are respectively located on either side of the motor shaft 1. The first elastic return member 50 is disposed between the first conductive structure 20 and the inner wall of the housing 10 to keep the first conductive structure 20 in the first separation state. The conductive wire 60 is disposed on the outer wall of the housing 10 .

[0028] Applying the technical solution of this embodiment, the motor shaft seal includes a housing 10, a first conductive structure 20, a first electromagnet 30, a second electromagnet 40, a first elastic return member 50, and a conductive wire 60 disposed on the outer wall of the housing 10. The housing 10 is provided with a first avoidance through-hole 11, which is used to avoid the motor shaft 1. The housing 10 is provided with a receiving space 12, which is connected to the first avoidance through-hole 11. The first conductive structure 20 is movably disposed on the housing 10 and is electrically connected to the housing 10. The first conductive structure 20 has a first conductive state and a first separated state. When the first conductive structure 20 is in the first conductive state, the first conductive structure 20 abuts the motor shaft 1. When the first conductive structure 20 is in the first separated state, the first conductive structure 20 is separated from the motor shaft 1. The first electromagnet 30 is disposed on the first conductive structure 20. When current flows through the motor shaft 1, the first conductive structure 20 switches from the first separated state to the first conductive state. The second electromagnet 40 is positioned opposite the first electromagnet 30, with the first and second electromagnets 30 and 40 located on either side of the motor shaft 1. A first elastic return member 50 is positioned between the first conductive structure 20 and the inner wall of the housing 10 to maintain the first conductive structure 20 in the first separated state. This arrangement enables the housing 10 to support the first conductive structure 20, the first electromagnet 30, the second electromagnet 40, and the first elastic return member 50. When the motor shaft 1 rotates, an interference current is generated on the motor shaft 1, which causes the first electromagnet 30 and the second electromagnet 40 to generate a magnetic force. Then, under the mutual attraction between the first electromagnet 30 and the second electromagnet 40, the first electromagnet 30 can move in a direction close to the second electromagnet 40, and then the first conductive structure 20 can abut the motor shaft 1, so that the current on the motor shaft 1 can be conducted to the housing 10 through the first conductive structure 20, and then conducted to the conductive line 60 through the housing 10, realizing the derivation of the current, thereby preventing the motor shaft from deviating, solving the problem that the motor shaft 1 deviates and causes the motor shaft 1 to rub against the motor shaft seal for a long time, causing damage to the motor shaft 1, and improving the service life of the motor shaft 1. When the first electromagnet 30 moves, it can drive the first elastic reset member 50 to move, so that the first elastic reset member 50 can have elastic potential energy, so that after there is no current on the motor shaft 1, the first elastic reset member 50 can drive the first electromagnet 30 to move in a direction away from the second electromagnet 40, so that the first conductive structure 20 remains in the first separation state. Therefore, the technical solution of this embodiment effectively solves the problem of motor shaft deviation.

[0029] like Figure 2 and Figure 3As shown, in this embodiment, the first conductive structure 20 includes a mounting seat 21 and a push piece 22. The mounting seat 21 is movably arranged on the housing 10 in a direction perpendicular to the axis of the first avoidance through hole 11 and is guided and matched with the housing 10. The first elastic return member 50 is arranged between the mounting seat 21 and the inner wall of the housing 10. The first end of the push piece 22 is connected to the mounting seat 21. The first electromagnet 30 is arranged at the second end of the push piece 22. When the first conductive structure 20 is in the first conductive state, the second end of the push piece 22 abuts against the motor shaft 1. When the first electromagnet 30 moves, it can drive the mounting seat 21 to move through the push piece 22. The mounting seat 21 can be guided and matched with the housing 10, so that the movement of the mounting seat 21 is smoother. The second end of the push piece 22 abuts against the motor shaft 1, so that the current can be conducted through the push piece 22.

[0030] like Figure 2 and Figure 3 As shown, in this embodiment, the push member 22 includes a connecting rod 221 and a push ball 222. The first end of the connecting rod 221 is connected to the mounting seat 21, and the second end of the connecting rod 221 is provided with a concave cavity. The first electromagnet 30 is provided at the second end of the connecting rod 221, and the push ball 222 is movably provided in the concave cavity. Through the above-mentioned arrangement, the push ball 222 can move in the concave cavity, so that there is sliding friction between the push ball 222 and the motor shaft 1, thereby reducing the wear of the motor shaft 1. When the first conductive structure 20 is in the first conductive state, the push ball 222 can abut against the motor shaft 1 to achieve current conduction.

[0031] The concave cavity is a spherical cavity, which wraps the abutting ball. The diameter of the opening of the spherical cavity is smaller than the ball diameter of the abutting ball, so that the abutting ball can be prevented from falling out of the concave cavity.

[0032] like Figures 2 to 4 As shown, in this embodiment, the mounting base 21 includes a base body 211 and a slider 212 connected to the base body 211. The first elastic reset member 50 is arranged between the base body 211 and the inner wall of the housing 10. A slide groove 13 is provided on the end wall of the housing 10. The slider 212 is movably arranged in the slide groove 13. The first end of the connecting rod 221 is connected to the base body 211. The slider 212 can slide in cooperation with the slide groove 13, making the movement of the base body 211 smoother. When the base body 211 moves, it can drive the first elastic reset member 50 to move, so that after the current is cut off on the motor shaft 1, the first elastic reset member 50 drives the supporting member 22 to move in a direction away from the motor shaft 1.

[0033] The sliding groove 13 is communicated with the first avoidance through hole 11 , which facilitates the installation of the slider 212 from the first avoidance through hole 11 into the sliding groove 13 .

[0034] like Figure 2 、 Figure 3 as well as Figure 5As shown, in this embodiment, the housing 10 is further provided with a stop plate 14, which is arranged at the notch of the chute 13. The slider 212 is provided with an escape groove 2121, and the stop plate 14 is arranged corresponding to the escape groove 2121. Through the above arrangement, the stop plate 14 can stop the slider 212 and prevent the slider 212 from falling out of the chute 13.

[0035] like Figure 2 and Figure 3 As shown, in this embodiment, the first conductive structure 20 further includes a slide bar 23. A second avoidance through-hole 15 is provided on the side wall of the housing 10. The first end of the slide bar 23 is connected to the first end of the connecting rod 221. The middle portion of the slide bar 23 is inserted into the second avoidance through-hole 15. The second end of the slide bar 23 is located outside the housing 10. The first elastic return member 50 is sleeved on the outer periphery of the slide bar 23. The slide bar 23 can guide the first elastic return member 50, making the movement of the first elastic return member 50 smoother.

[0036] like Figure 2 and Figure 3 As shown, in this embodiment, the base body 211 is provided with a third avoidance through-hole 2111, and the slide rod 23 is disposed within the third avoidance through-hole 2111. The first conductive structure 20 further includes a first threaded sleeve 24, which is threadably engaged with the connecting rod 221. The first threaded sleeve 24 and the slide rod 23 are respectively located on either side of the base body 211. The third avoidance through-hole 2111 allows for the slide rod 23 to pass through. The first threaded sleeve 24 and the slide rod 23 connect the connecting rod 221 to the base body 211.

[0037] The base body 211 includes a first plate body and a second plate body vertically arranged to the second plate body.

[0038] The slider 212 is disposed at one end of the first plate body close to the end wall of the housing 10. The second plate body is disposed on a side of the first plate body facing the second electromagnet 40.

[0039] The third avoidance through hole 2111 is provided on the first plate body. The third avoidance through hole 2111 is located at an end of the first plate body away from the slider.

[0040] like Figure 2 and Figure 3 As shown, in this embodiment, the slide rod 23 includes a rod body 231 and a cylinder 232 provided at a first end of the rod body 231. The second end of the rod body 231 is located outside the housing 10. The first end of the connecting rod 221 is threadedly engaged with the cylinder 232. The cylinder 232 and the first threaded sleeve 24 cooperate with each other to connect the connecting rod 221 to the base 211.

[0041] By moving the barrel 232 and the first threaded sleeve 24 away from each other on the connecting rod 221, the relative position of the connecting rod 221 and the base 211 can be adjusted, facilitating adjustment of the relative positions of the first conductive structure 20 and the second conductive structure 70 based on the diameter of the motor shaft 1. After adjustment, the barrel 232 and the first threaded sleeve 24 are brought closer together and clamped on both sides of the base 211 to secure the connecting rod 221.

[0042] like Figure 2 and Figure 3 As shown, in this embodiment, the first conductive structure 20 further includes a second threaded sleeve 25, which is disposed outside the housing 10 and is threadably engaged with the second end of the rod 231. The second threaded sleeve 25 prevents the second end of the rod 231 from moving into the housing 10.

[0043] like Figure 2 and Figure 3 As shown, in this embodiment, the motor shaft seal further includes: a second conductive structure 70 and a second elastic reset member 80. The second conductive structure 70 is movably disposed on the housing 10 and located within the accommodating space 12. The second conductive structure 70 has a second conductive state in contact with the motor shaft 1 and a second separated state in contact with the motor shaft 1. The second elastic reset member 80 is disposed between the second conductive structure 70 and the inner wall of the housing 10 to maintain the second conductive structure 70 in the second separated state. The second electromagnet 40 is disposed on the second conductive structure 70 so that when current flows through the motor shaft 1, the second conductive structure 70 is in the second conductive state. When current flows through the motor shaft 1, under the mutual attraction between the first electromagnet 30 and the second electromagnet 40, the second electromagnet 40 can move toward the direction closer to the first electromagnet 30, thereby enabling the first conductive structure 20 to abut against the motor shaft 1, so that the current on the motor shaft 1 can be conducted to the housing 10 via the second conductive structure 70, and then conducted to the conductive wire 60 via the housing 10, thereby achieving current diversion. When the second electromagnet 40 moves, it can drive the second elastic return member 80 to move, so that the second elastic return member 80 can have elastic potential energy, so that after there is no current in the motor shaft 1, the second elastic return member 80 can drive the second electromagnet 40 to move in the direction away from the first electromagnet 30, so that the second conductive structure 70 remains in the second separation state.

[0044] A sliding groove corresponding to the sliding block 212 of the second conductive structure 70 is further provided on the end wall of the housing 10 .

[0045] The first elastic return member 50 and the second elastic return member 80 are both tension springs.

[0046] The motor shaft seal further includes a transmission structure 90 , which is disposed between the first conductive structure 20 and the second conductive structure 70 to enable the first conductive structure 20 and the second conductive structure 70 to move closer to or farther from each other.

[0047] The transmission structure 90 includes a first connecting rod 91 and a second connecting rod 92. The first end of the first connecting rod 91 is connected to the first conductive structure 20, the second end of the first connecting rod 91 is hingedly connected to the first end of the second connecting rod 92, the middle part of the second connecting rod 92 is hingedly connected to the shell 10, and the second end of the second connecting rod 92 is hingedly connected to the second conductive structure 70.

[0048] The arrangement of the first connecting rod 91 and the second connecting rod 92 enables, when the first conductive structure 20 moves toward the second conductive structure 70, the first conductive structure 20 can drive the first connecting rod 91 to move in the direction from the first conductive structure 20 to the second conductive structure 70. Furthermore, the first connecting rod 91 can drive the second connecting rod 92 to swing, so that the second end of the second connecting rod 92 can drive the second conductive structure 70 to move toward the first conductive structure 20. When the first conductive structure 20 moves away from the second conductive structure 70, the first conductive structure 20 can drive the first connecting rod 91 to move in the direction from the second conductive structure 70 to the first conductive structure 20. Furthermore, the first connecting rod 91 can drive the second connecting rod 92 to swing, so that the second end of the second connecting rod 92 can drive the second conductive structure 70 to move away from the first conductive structure 20.

[0049] The second end of the second connecting rod 92 is hingedly connected to the base 211 of the mounting base 21 of the second conductive structure 70 .

[0050] The middle portion of the first connecting rod extends in a direction away from the avoidance through hole.

[0051] The first connecting rod 91 includes a curved section and a straight section. The first end of the curved section is hingedly connected to the mounting seat 21, the second end of the curved section is hingedly connected to the first end of the straight section, and the second end of the straight section is hingedly connected to the base body 211 of the mounting seat 21 of the second conductive structure 70.

[0052] The structure of the second conductive structure 70 is the same as that of the first conductive structure 20 except for the base 211 of the second conductive structure 70 .

[0053] The first end of the first connecting rod 91 is connected to the second plate of the base 211 of the first conductive structure 20 by screws.

[0054] The second end of the second connecting rod 92 is hingedly connected to the second plate of the base 211 of the second conductive structure 70 via a first connecting shaft.

[0055] The second end of the first connecting rod 91 is hingedly connected to the first end of the second connecting rod 92 via a second connecting shaft.

[0056] The middle portion of the second connecting rod 92 is hingedly connected to the housing 10 via a third connecting shaft.

[0057] The motor shaft seal further comprises a cover body, which is arranged on the housing.

[0058] The motor shaft seal further includes a plurality of screws, which are connected between the shell and the cover.

[0059] The first avoidance through hole 11 is provided on the first end wall of the housing, and the opening of the accommodating space 12 is located on the second end wall of the housing.

[0060] The direction from the first end wall of the housing 10 to the second end wall of the housing 10 is parallel to the axial direction of the first avoidance through hole 11 .

[0061] The sliding groove 13 is arranged on the first end wall of the housing.

[0062] When working, the shell 10 is installed on the outside of the motor shaft when in use. At this time, the motor shaft can operate normally. When an interference current is generated on the motor shaft, the first electromagnet 30 and the second electromagnet 40 will generate magnetic force. The first electromagnet 30 and the second electromagnet 40 attract each other, and the top ball 222 will fit with the motor shaft. At this time, the current will be conducted along the top ball 222 to the connecting rod 221, and the rotation of the top ball 222 inside the concave cavity can ensure the smooth rotation of the motor shaft. The interference current generated on the motor shaft is conducted along the top ball 222 and the connecting rod 221 to the first elastic reset member 50, and then the first elastic reset member 50 conducts the current to the outside of the shell 10, at this time, the interference voltage can be dispersed. After the interference voltage is dispersed, the first electromagnet 30 and the second electromagnet 40 lose their magnetic force. At this time, the first elastic reset member 50 will pull the connecting rod 221 and the top ball 222 to reset, thereby preventing the motor shaft from deviating, solving the problem that the motor shaft deviation causes the motor drive shaft to rub against the shaft seal for a long time, causing damage to the motor drive shaft, and improving the service life of the motor shaft.

[0063] The working process of the second conductive structure 70 is the same as that of the first conductive structure 20 .

[0064] During operation, after the magnetic force of the first electromagnet 30 and the second electromagnet 40 disappears, the first elastic reset member 50 pulls the connecting rod 221 to reset, and the slide rod 23 can limit the position of the connecting rod 221. When the first electromagnet 30 and the second electromagnet 40 generate magnetic force, the first electromagnet 30 will pull the connecting rod 221, causing the first elastic reset member 50 to be stretched, and the slide rod 23 will move with the connecting rod 221, and the second threaded sleeve 25 can prevent the slide rod 23 from entering the accommodating space 12 opened in the shell 10, avoiding the slide rod 23 from entering the accommodating space 12 and being unable to be taken out, thereby improving the stability of the extension and retraction of the connecting rod 221.

[0065] The outside of the housing 10 is fixedly connected to a connecting rubber seat, and one end of the connecting rubber seat away from the housing 10 is fixedly connected to a conductive wire 60 . The connecting rubber seat is arranged in a cone shape.

[0066] During operation, the slide rod 23 slides inside the second avoidance hole 15 to ensure the position of the slide rod 23. When the interference current is dispersed to the shell 10, the interference current can be quickly discharged by connecting the rubber seat and the conductive wire 60, and the conical structure of the connecting rubber seat can ensure the stable connection between the conductive wire 60 and the shell 10, thereby improving the dispersion effect of the interference current of the shell 10.

[0067] Working principle: When in use, the shell 10 is installed on the outside of the motor shaft 1. At this time, the motor shaft 1 can operate normally. When an interference current is generated on the motor shaft 1, the first electromagnet 30 and the second electromagnet 40 will generate magnetic force. The first electromagnet 30 and the second electromagnet 40 will attract each other, and the top ball 222 will fit with the motor shaft. At this time, the current will be conducted along the top ball 222 to the connecting rod 221, and the top ball 222 rotates inside the concave cavity to ensure the smooth rotation of the motor shaft. The interference current generated on the motor shaft is conducted along the top ball 222 and the connecting rod 221 to the first elastic reset member 50, and then the first elastic reset member 50 conducts the current to the outside of the shell 10. At this time, the interference voltage can be dispersed. After the interference voltage is dispersed, the first electromagnet 30 and the second electromagnet 40 lose their magnetic force. At this time, the first elastic reset member 50 will pull the connecting rod 221 and the top ball 222 to reset, thereby preventing the motor shaft from deviating, and solving the problem of long-term contact between the drive shaft of the motor and the motor caused by the deviation of the motor shaft. The shaft seal friction causes the problem of damage to the drive shaft of the motor, which improves the service life of the motor shaft. After the magnetic force of the first electromagnet 30 and the second electromagnet 40 disappears, the first elastic reset member 50 pulls the connecting rod 221 to reset. The slide rod 23 can limit the position of the connecting rod 221. When the first electromagnet 30 and the second electromagnet 40 generate magnetic force, the first electromagnet 30 will pull the connecting rod 221, causing the first elastic reset member 50 to be stretched, and the slide rod 23 will move with the connecting rod 221. The second threaded sleeve 25 can prevent the slide rod 23 from entering the interior of the shell 10 and being unable to be removed, thereby improving the stability of the extension and retraction of the connecting rod 221. The slide rod 23 slides inside the second avoidance through hole 15 to ensure the position of the slide rod 23. When the interference current is dispersed to the shell 10, the interference current can be quickly discharged by connecting the rubber seat and the conductive wire 60, and the conical structure of the connecting rubber seat can ensure the stable connection between the conductive wire 60 and the shell 10, thereby improving the dispersion effect of the interference current of the shell 10.

[0068] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0069] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0070] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0071] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A motor shaft seal, characterized in that: include: A housing (10), wherein a first avoidance through hole (11) is provided on the housing (10) for avoiding the motor shaft (1), and an accommodating space (12) in communication with the first avoidance through hole (11) is provided in the housing (10); a first conductive structure (20), the first conductive structure (20) being movably disposed on the housing (10) and conductively connected to the housing (10), the first conductive structure (20) being located in the accommodating space (12), the first conductive structure (20) having a first conductive state in contact with the motor shaft (1) and a first separated state in which the first conductive structure is separated from the motor shaft (1); a first electromagnet (30), the first electromagnet (30) being arranged on the first conductive structure (20) so that when current flows through the motor shaft (1), the first conductive structure (20) switches from the first separation state to the first conductive state; a second electromagnet (40), the second electromagnet (40) being arranged opposite to the first electromagnet (30), and the second electromagnet (40) and the first electromagnet (30) being respectively located on both sides of the motor shaft (1); a first elastic return member (50), the first elastic return member (50) being arranged between the first conductive structure (20) and the inner wall of the housing (10) so as to keep the first conductive structure (20) in the first separated state; A conductive line (60) is provided on the outer wall of the housing (10).

2. The motor shaft seal according to claim 1, characterized in that: The first conductive structure (20) includes a mounting seat (21) and a resisting member (22); the mounting seat (21) is movably arranged on the housing (10) in a direction perpendicular to the axis of the first avoidance through hole (11) and is guided and matched with the housing (10); the first elastic reset member (50) is arranged between the mounting seat (21) and the inner wall of the housing (10); the first end of the resisting member (22) is connected to the mounting seat (21); the first electromagnet (30) is arranged at the second end of the resisting member (22); when the first conductive structure (20) is in the first conductive state, the second end of the resisting member (22) is in contact with the motor shaft (1).

3. The motor shaft seal according to claim 2, characterized in that: The resisting member (22) comprises a connecting rod (221) and a resisting ball (222); the first end of the connecting rod (221) is connected to the mounting seat (21); the second end of the connecting rod (221) is provided with a concave cavity; the first electromagnet (30) is provided at the second end of the connecting rod (221); and the resisting ball (222) is movably provided in the concave cavity.

4. The motor shaft seal according to claim 3, characterized in that: The mounting seat (21) includes a seat body (211) and a slider (212) connected to the seat body (211); the first elastic reset member (50) is arranged between the seat body (211) and the inner wall of the shell (10); a slide groove (13) is provided on the end wall of the shell (10); the slider (212) is movably arranged in the slide groove (13); and the first end of the connecting rod (221) is connected to the seat body (211).

5. The motor shaft seal according to claim 4, characterized in that: The housing (10) is further provided with a stop plate (14), the stop plate (14) being arranged at the notch of the slide groove (13), the slider (212) being provided with an avoidance groove (2121), the stop plate (14) being arranged corresponding to the avoidance groove (2121).

6. The motor shaft seal according to claim 4, characterized in that: The first conductive structure (20) also includes a sliding rod (23), a second avoidance through hole (15) is provided on the side wall of the shell (10), the first end of the sliding rod (23) is connected to the first end of the connecting rod (221), the middle part of the sliding rod (23) is passed through the second avoidance through hole (15), the second end of the sliding rod (23) is located outside the shell (10), and the first elastic reset member (50) is sleeved on the outer periphery of the sliding rod (23).

7. The motor shaft seal according to claim 6, characterized in that: The seat body (211) is provided with a third avoidance through hole (2111), and the slide rod (23) is inserted into the third avoidance through hole (2111). The first conductive structure (20) also includes a first threaded sleeve (24), and the first threaded sleeve (24) is threadedly matched with the connecting rod (221). The first threaded sleeve (24) and the slide rod (23) are respectively located on both sides of the seat body (211).

8. The motor shaft seal according to claim 6, characterized in that: The sliding rod (23) includes a rod body (231) and a cylinder body (232) arranged at a first end of the rod body (231); the second end of the rod body (231) is located outside the housing (10); and the first end of the connecting rod (221) is threadedly engaged with the cylinder body (232).

9. The motor shaft seal according to claim 8, characterized in that: The first conductive structure (20) further includes a second threaded sleeve (25), which is arranged outside the housing (10) and is threadably engaged with the second end of the rod body (231).

10. The motor shaft seal according to any one of claims 1 to 9, characterized in that: The motor shaft seal also includes: a second conductive structure (70), the second conductive structure (70) being movably disposed on the housing (10) and located within the accommodating space (12), the second conductive structure (70) having a second conductive state in contact with the motor shaft (1) and a second separated state in which the second conductive structure (70) is separated from the motor shaft (1); a second elastic return member (80), the second elastic return member (80) being arranged between the second conductive structure (70) and the inner wall of the housing (10) so as to keep the second conductive structure (70) in the second separated state; The second electromagnet (40) is arranged on the second conductive structure (70), so that when current flows through the motor shaft (1), the second conductive structure (70) is in the second conductive state.

Images