Motor bearing locking protection structure and motor

Abstract

The invention discloses a motor bearing locking protection structure and a motor, and relates to the technical field of motors, the motor bearing locking protection structure is integrated on the motor, a bearing cover is arranged on an end cover of the motor, one side, facing the end cover, of the bearing cover is provided with a counter bore, and the bearing cover is provided with a through hole which is communicated with the counter bore and leads to one side, back to the end cover, of the bearing cover; the outer oil seal is arranged on a rotor of the motor; the locking disc is arranged on one side, back to the end cover, of the bearing cover; the locking screw is arranged on the bearing cover, the head of the locking screw is arranged in the counter bore, the rod portion of the locking screw penetrates through the through hole and is in threaded connection with the locking disc, the tail end of the rod portion penetrates out of the locking disc, and an operation structure is arranged at the tail end of the rod portion. According to the motor bearing locking protection structure, through the integrated motor bearing locking protection structure, stable fixation of the bearing in the transportation and storage process is achieved, bearing displacement and damage caused by vibration and impact are prevented, meanwhile, effective operation clearance control is provided, and the reliability and safety of a motor are enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a motor bearing locking protection structure and a motor. Background Art

[0002] In modern industrial applications, motors are used as key power conversion components in a wide range of machinery and equipment. Their performance and reliability directly affect the stability and safety of the entire system. During the transportation and storage of motors, due to vibration and impact, the bearing assembly may be displaced, resulting in bearing damage or functional failure, thus affecting the overall performance of the motor. In addition, during the operation of the motor, electrical corrosion is also one of the important reasons for premature bearing failure.

[0003] At present, the protection structure of motor bearings has some obvious shortcomings. Traditional protection schemes usually rely on external tooling or complex mechanical structures to fix the bearings. These methods are often closely related to shaft heads of specific sizes and lack versatility. In addition, these schemes have problems such as difficult installation, complicated operation and high cost in actual operation. For whole vehicle transportation, although the decoupling method is feasible, it requires the disassembly of multiple parts, which increases the complexity and time cost of the operation. More importantly, the existing protection schemes often ignore the problem of electrocorrosion and do not provide effective solutions to prevent electrocorrosion damage to bearings. These defects limit the development and application of motor bearing protection technology. Summary of the invention

[0004] The purpose of the present application is to provide a motor bearing locking and protection structure. Through the integrated motor bearing locking and protection structure, a reverse-installed locking screw and a locking plate that precisely matches the external oil seal are used to achieve stable fixation of the bearing during transportation and storage, effectively preventing bearing displacement and damage caused by vibration and impact. At the same time, a simple operating structure is used to achieve convenient control of bearing locking and release, thereby improving the reliability of the motor and the convenience of maintenance.

[0005] To achieve the above-mentioned purpose, the present application provides a motor bearing locking protection structure, which is integrated in the motor, and the motor bearing locking protection structure includes:

[0006] A bearing cover is arranged on the end cover of the motor, wherein the bearing cover is provided with a countersunk hole on a side facing the end cover, and the bearing cover is provided with a through hole connected to the countersunk hole and leading to a side of the bearing cover facing away from the end cover;

[0007] External oil seal, installed on the rotor of the motor;

[0008] A locking plate, arranged on a side of the bearing cover facing away from the end cover;

[0009] A locking screw is arranged on the bearing cover, the head of the locking screw is arranged in the countersunk hole, the rod of the locking screw passes through the through hole and is threadedly connected with the locking disk, the end of the rod passes through the locking disk, and an operating structure is arranged on the end of the rod. The locking screw is rotated by the operating structure to drive the locking disk to move axially, control the locking disk to lock the rotor of the compression bearing when it abuts against the outer oil seal, and control the locking disk to form a running gap when it is separated from the outer oil seal.

[0010] In some embodiments, the outer oil seal and the locking plate are matched at a radial bevel, the rotor includes a rotating shaft provided with a shoulder, the bearing is arranged in the shoulder of the rotating shaft, and the outer oil seal is located on the side of the bearing away from the shoulder; in the direction of the outer oil cover toward the bearing, the outer oil seal and the bevel of the locking plate are inclined radially toward one side of the rotating shaft, so that when the locking plate moves away from the bearing cover, the bearing is axially locked between the shoulder and the outer oil seal.

[0011] In some embodiments, the bearing cover is further provided with a carbon brush, which is extended toward the rotor and is used to guide the shaft current of the rotor to the end cover.

[0012] In some embodiments, the operating structure is a hexagonal hole.

[0013] In some embodiments, a rubber pad is provided in the counterbore, and two ends of the rubber pad abut against the end cover and the head.

[0014] In some embodiments, the number of the countersunk holes, the locking screws and the rubber pads are all multiple, and the multiple countersunk holes have two or more depth dimensions to achieve different deformation amounts of the multiple rubber pads, so that the multiple locking screws are subjected to different axial forces to prevent the locking plate from loosening.

[0015] In some embodiments, there are multiple locking screws, and the multiple locking screws are evenly distributed along the circumference of the bearing cover.

[0016] In some embodiments, the bearing cover is connected to the end cover by bolts, and in the circumferential direction, the hole positions on the bearing cover corresponding to the bolts and the hole positions on the bearing cover corresponding to the locking screws are arranged alternately.

[0017] In some embodiments, in the radial direction, the outer periphery of the locking plate is provided with an annular surface, the inner periphery of the locking plate is provided with a first inclined surface, the inner periphery of the bearing cover is provided with an annular cavity matching with the annular surface to guide the axial movement of the locking plate, and the outer periphery of the outer oil seal is provided with a second inclined surface matching with the first inclined surface, and the first inclined surface and the second inclined surface are conical surfaces.

[0018] The present application also provides a motor, including an end cover, a rotor, a bearing and the above-mentioned motor bearing locking protection structure. In the radial direction, the bearing and the motor bearing locking protection structure are arranged between the end cover and the rotor, and in the axial direction, the motor bearing locking protection structure is arranged at one end of the bearing.

[0019] Compared with the above-mentioned background technology, the motor bearing locking protection structure provided in the present application is integrated in the motor, and the motor bearing locking protection structure mainly includes a bearing cover, an external oil seal, a locking plate and a locking screw. The bearing cover is arranged on the end cover of the motor, and the bearing cover is provided with a countersunk hole on the side facing the end cover, and the bearing cover is provided with a through hole connecting the countersunk hole and leading to the side of the bearing cover facing away from the end cover; the external oil seal is arranged on the rotor of the motor; the locking plate is arranged on the side of the bearing cover facing away from the end cover; the locking screw is arranged on the bearing cover, and the head of the locking screw is arranged in the countersunk hole, the rod of the locking screw passes through the through hole and is threadedly connected with the locking plate, the end of the rod passes through the locking plate, and an operating structure is provided on the end of the rod, and the locking screw is rotated by the operating structure to drive the locking plate to move axially, so as to control the locking plate to lock the rotor of the compression bearing when it abuts against the external oil seal, and to control the locking plate to form a running gap when it is separated from the external oil seal.

[0020] In traditional motor design, bearing fixation usually relies on complex external tooling or structures, which are not only difficult to install and costly, but also lack sufficient versatility to adapt to motor bearings of different sizes and types. In addition, these traditional structures often ignore the problem of electrical corrosion, which leads to premature failure of bearings and affects the reliability and safety of motors.

[0021] In response to these defects, the motor bearing locking protection structure provided in the present application is directly integrated into the motor through an integrated design, avoiding dependence on external tooling. The structure mainly includes a bearing cover, an external oil seal, a locking plate and a locking screw. The bearing cover is fixed to the motor end cover and is designed with a countersunk hole and a through hole. The head of the locking screw is arranged in the countersunk hole, and the rod passes through the through hole and is threadedly connected to the locking plate. This design allows the locking screw to be rotated through the operating structure to drive the locking plate to move axially, thereby controlling the contact between the locking plate and the external oil seal, and realizing the locking and release of the bearing rotor.

[0022] When the locking disk is in contact with the outer oil seal, the bearing rotor is locked and compressed to prevent bearing displacement and damage caused by vibration and impact during transportation and storage. When the locking disk is separated from the outer oil seal, the necessary running clearance is formed to ensure the normal operation of the bearing. This structural design not only simplifies the installation and maintenance process and reduces costs, but also improves the protection effect of the motor bearing. In addition, the universal design of the structure enables it to adapt to motor bearings of different sizes and types, further expanding its application range.

[0023] Combined with the above structure and process description, it can be seen that the motor bearing locking protection structure has at least the following beneficial effects: the motor bearing locking protection structure realizes stable fixation of the bearing during transportation and storage through an integrated motor bearing locking protection structure, prevents bearing displacement and damage caused by vibration and impact, and at the same time provides effective running clearance control, thereby enhancing the reliability and safety of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] FIG1 is a schematic diagram of a motor bearing locking protection structure provided in an embodiment of the present application;

[0026] Fig. 2 is a partial view of A in Fig. 1;

[0027] FIG3 is a partial view of B in FIG1 ;

[0028] FIG4 is a schematic diagram of a bearing cap provided in an embodiment of the present application;

[0029] FIG5 is a schematic diagram of a locking disk provided in an embodiment of the present application;

[0030] FIG6 is a schematic diagram of a motor bearing locking protection structure provided in an embodiment of the present application in a product operation state;

[0031] FIG. 7 is a schematic diagram of the motor bearing locking protection structure provided in an embodiment of the present application in a transport locking state.

[0032] in:

[0033] End cover 1, bearing cover 2, annular cavity 201, locking plate 3, annular surface 301, first inclined surface 302, outer oil seal 4, second inclined surface 401, bolt 5, locking screw 6, rubber pad 7, carbon brush 8, rotor 9, bearing 10, rotating shaft 11, shaft shoulder 12, countersunk hole 13, through hole 14, hexagon socket hole 15. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Please refer to Figures 1 to 3, wherein Figure 1 is a schematic diagram of a motor bearing locking protection structure provided in an embodiment of the present application, Figure 2 is a partial view of A in Figure 1, and Figure 3 is a partial view of B in Figure 1.

[0037] In a first specific implementation manner, the motor bearing locking protection structure provided in the implementation manner of the present application is integrated into the motor, and the motor bearing locking protection structure mainly includes a bearing cover 2, an external oil seal 4, a locking plate 3 and a locking screw 6. The bearing cover 2 is arranged on the end cover 1 of the motor, and the bearing cover 2 is provided with a countersunk hole 13 on the side facing the end cover 1. The bearing cover 2 is provided with a through hole 14 connecting the countersunk hole 13 and leading to the side of the bearing cover 2 facing away from the end cover 1; the external oil seal 4 is arranged on the rotor 9 of the motor; the locking plate 3 is arranged on the back of the bearing cover 2 Toward one side of the end cover 1; the locking screw 6 is arranged on the bearing cover 2, the head of the locking screw 6 is arranged on the countersunk hole 13, the rod of the locking screw 6 passes through the through hole 14 and is threadedly connected with the locking plate 3, the end of the rod passes through the locking plate 3, and the end of the rod is provided with a hexagonal hole 15. The locking screw 6 is rotated through the hexagonal hole 15 to drive the locking plate 3 to move axially, control the locking plate 3 to lock the rotor 9 of the compression bearing 10 when it abuts against the outer oil seal 4, and control the locking plate 3 to form a running gap when it is separated from the outer oil seal 4.

[0038] In traditional motor design, bearing fixation usually relies on complex external tooling or structures, which are not only difficult to install and costly, but also lack sufficient versatility to adapt to motor bearings of different sizes and types. In addition, these traditional structures often ignore the problem of electrical corrosion, which leads to premature failure of bearings and affects the reliability and safety of motors.

[0039] In response to these defects, the motor bearing locking protection structure provided in the present application is directly integrated into the motor through an integrated design, avoiding dependence on external tooling. The structure mainly includes a bearing cover 2, an external oil seal 4, a locking plate 3 and a locking screw 6. The bearing cover 2 is fixed to the motor end cover 1, and is designed with a countersunk hole 13 and a through hole 14. The head of the locking screw 6 is arranged in the countersunk hole 13, and the rod passes through the through hole 14 and is threadedly connected to the locking plate 3. This design allows the locking screw 6 to be rotated through the hexagonal hole 15, driving the locking plate 3 to move axially, thereby controlling the contact between the locking plate 3 and the external oil seal 4, and realizing the locking and release of the bearing 10 rotor 9.

[0040] When the locking disk 3 is in contact with the outer oil seal 4, the bearing 10 and the rotor 9 are locked and compressed to prevent the bearing 10 from displacement and damage due to vibration and impact during transportation and storage. When the locking disk 3 is separated from the outer oil seal 4, the necessary running clearance is formed to ensure the normal operation of the bearing 10. This structural design not only simplifies the installation and maintenance process and reduces costs, but also improves the protection effect of the motor bearing 10. In addition, the universal design of the structure enables it to adapt to motor bearings of different sizes and types, further expanding its application range.

[0041] Combined with the above structure and process description, it can be seen that the motor bearing locking protection structure has at least the following beneficial effects: the motor bearing locking protection structure realizes stable fixation of the bearing 10 during transportation and storage through an integrated motor bearing locking protection structure, prevents displacement and damage of the bearing 10 due to vibration and impact, and at the same time provides effective running clearance control, thereby enhancing the reliability and safety of the motor.

[0042] Taking the traction motor as an example, since the motor bearing locking protection structure is part of the structure of the traction motor product, it not only saves separate transportation protection tooling, but also eliminates the management problem of recycling and reuse, and has a great cost advantage.

[0043] Please refer to Figures 4 to 7, wherein Figure 4 is a schematic diagram of the bearing cover provided in an embodiment of the present application, Figure 5 is a schematic diagram of the locking plate provided in an embodiment of the present application, Figure 6 is a schematic diagram of the motor bearing locking protection structure provided in an embodiment of the present application in a product operating state, and Figure 7 is a schematic diagram of the motor bearing locking protection structure provided in an embodiment of the present application in a transport locking state.

[0044] In some embodiments, the outer oil seal 4 and the locking plate 3 are matched with each other at a radial bevel, the rotor 9 includes a rotating shaft 11 provided with a shoulder 12, the bearing 10 is arranged in the shoulder 12 of the rotating shaft 11, and the outer oil seal 4 is located on the side of the bearing 10 away from the shoulder 12; in the direction in which the outer oil seal 4 faces the bearing 10, the bevel of the outer oil seal 4 and the locking plate 3 are inclined radially toward the side of the rotating shaft 11, so that when the locking plate 3 moves away from the bearing cover 2, the bearing 10 is locked axially between the shoulder 12 and the outer oil seal 4.

[0045] In this embodiment, the rotor 9 is composed of a shaft 11 and a shoulder 12, and the bearing 10 is installed in the shoulder 12 of the shaft 11. Such a design allows the bearing 10 to have a clear installation position on the shaft 11. The external oil seal 4 is located on one side of the bearing 10 and in the opposite direction of the shoulder 12. This layout is intended to protect the bearing 10 from the intrusion of contaminants and also helps to maintain the lubrication of the bearing 10.

[0046] The radial bevel fit between the locking plate 3 and the outer oil seal 4 is one of the key features of this design. The design of the bevel enables the locking plate 3 to push the outer oil seal 4 when it moves away from the bearing cover 2, and the thrust generated by the bevel is used to press the bearing 10 between the shaft shoulder 12 and the outer oil seal 4 in the axial direction. This locking mechanism not only provides a simple and effective bearing fixing method, but also realizes self-positioning and tightening of the bearing 10 through the design of the bevel.

[0047] When the bearing 10 needs to be fixed at a specific position, the locking screw 6 is rotated to push the locking plate 3 to move axially along the rotating shaft 11. The movement of the locking plate 3 changes the relative position between it and the outer oil seal 4, so that the bearing 10 is compressed, thereby providing a firm fixation. This design reduces the risk of displacement of the bearing 10 due to vibration and impact during transportation and storage, and improves the reliability of the motor.

[0048] In addition, the design of the inclined surface also allows a proper gap to be formed between the outer oil seal 4 and the locking disk 3 when the locking disk 3 is released, which provides the necessary operating space for the bearing 10 and ensures the normal operation and long life of the bearing 10. Therefore, this structure not only strengthens the fixation of the bearing 10, but also takes into account the operating requirements of the bearing 10, reflecting an efficient and reliable design concept.

[0049] Taking Figures 6 and 7 as examples, the inclined surface of the locking plate 3 is the first inclined surface 302, and the inclined surface of the outer oil seal 4 is the second inclined surface 401. When the locking plate 3 moves away from the bearing cover 2, the first inclined surface 302 and the second inclined surface 401 form mechanical contact, and the interaction force is perpendicular to the direction of the inclined surface and can be decomposed into two components: radial force and axial force.

[0050] In the radial direction, the locking plate 3 is supported by the bearing cover 2. The locking plate 3 supports the rotor 9 to unload the load of the bearing 10. The locking plate 3 temporarily replaces the supporting function of the bearing 10, so that the force on the bearing 10 is zero, thereby achieving the purpose of protecting the bearing 10.

[0051] In the axial direction, the rotor 9 is made to axially press the bearing 10 and lock it. During the locking process, the inclined surfaces of the locking plate 3 and the outer oil seal 4 are in contact. After the axial displacement of the rotor 9 reaches the positioning size, the locking force is proportional to the tightening torque of the locking screw 6.

[0052] Therefore, the interaction force between the locking plate 3 and the inclined surface of the outer oil seal 4 can ensure that the bearing 10 is in a completely locked state, thus playing a role in transportation protection.

[0053] In some embodiments, the bearing cover 2 is further provided with a carbon brush 8 , which is extended toward the rotor 9 , and the carbon brush 8 is used to guide the shaft current of the rotor 9 to the end cover 1 .

[0054] In this embodiment, the bearing cap 2 is additionally provided with a carbon brush 8, which is an important design improvement because it adds a function of preventing shaft electrical corrosion to the motor bearing locking protection structure. The carbon brush 8 is particularly extended toward the rotor 9, thereby effectively collecting the shaft current generated by the rotor 9.

[0055] When the motor is running, the rotor 9 may generate shaft currents for various reasons. If these currents are not controlled, they will be conducted through the bearings 10, causing so-called electrical corrosion, which will reduce the service life of the bearings 10 and affect their performance. In order to reduce this risk, the role of the carbon brushes 8 is to guide these shaft currents from the rotor 9 to the end cover 1.

[0056] The end cap 1 acts as a collection point for the current and can be grounded through the motor frame to safely direct the current to the ground. This grounding mechanism effectively provides a low-impedance path for the current to bypass the bearing 10, thereby preventing electrical corrosion that may occur when the current passes through the bearing 10.

[0057] In this way, the use of the carbon brush 8 and the end cover 1 not only improves the reliability of the motor and the durability of the bearing 10, but also simplifies the maintenance and operation of the motor. This design embodies a comprehensive solution that comprehensively considers various factors affecting the operation of the motor, ensuring that the motor can operate stably in various environments.

[0058] Taking FIG. 6 as an example, the outer diameter side of the carbon brush 8 is arranged on the bearing cover 2 , and the inner diameter side of the carbon brush 8 faces the outer oil seal 4 and the rotor 9 .

[0059] In some embodiments, the operating structure is a hexagonal hole 15 .

[0060] The reverse installation of the locking screw 6 has important functional advantages. When the locking screw 6 rotates, it does not move axially itself, but drives the locking disk 3 to move axially through the transmission effect of the thread. This design allows the locking screw 6 to control the position of the locking disk 3 by rotating without moving the locking screw 6 itself in the axial direction, effectively preventing the locking screw 6 from falling off.

[0061] When the bearing 10 needs to be locked or released, the locking screw 6 with an inner hexagon socket is rotated to achieve the axial movement of the locking plate 3. The inclined surface of the locking plate 3 forms a mechanical contact with the inclined surface of the outer oil seal 4, and this contact is achieved by the rotation of the locking screw 6 and the axial movement of the locking plate 3. When the locking plate 3 is pushed out and contacts the outer oil seal 4, sufficient force can be generated to press the bearing 10 on the rotor 9, thereby achieving the fixation and protection of the bearing 10.

[0062] In addition, a hexagonal hole 15 is provided at the end of the rod of the locking screw 6. This design facilitates the rotation operation of the locking screw 6, making the entire locking and releasing process more efficient and convenient.

[0063] In some embodiments, a rubber pad 7 is disposed in the counterbore 13 , and two ends of the rubber pad 7 abut against the end cover 1 and the head.

[0064] In this embodiment, the rubber pad 7 is introduced to enhance the stability and reliability of the entire locking structure. The main function of the rubber pad 7 is to compress the locking screw 6 to prevent it from being displaced or loosened under vibration or other external forces. Since the locking screw 6 may be subjected to axial and radial forces during operation, the rubber pad 7 provides a certain pre-tightening force through its elastic properties to ensure that the locking screw 6 is firmly fixed in the countersunk hole 13.

[0065] Through the elastic compression of the rubber pad 7, a tight seal can be formed between the head of the locking screw 6 and the end cover 1, which not only helps to improve the rigidity of the structure, but also reduces any potential noise or wear caused by vibration. In addition, under the axial force of the locking screw 6, the rubber pad 7 can provide a reverse buffer resistance, further ensuring the stability of the entire locking mechanism.

[0066] In some embodiments, the number of countersunk holes 13, locking screws 6 and rubber pads 7 is multiple, and the multiple countersunk holes 13 have two or more depth dimensions to achieve different deformation amounts of the multiple rubber pads 7, so that the multiple locking screws 6 are subjected to different axial forces to prevent the locking plate 3 from loosening.

[0067] In this embodiment, in order to further enhance the stability of the locking mechanism, the design uses a plurality of countersunk holes 13, a plurality of corresponding locking screws 6, and a plurality of rubber pads 7. The number of these components is consistent, and the design intentionally allows the countersunk holes 13 to have at least two different depth sizes.

[0068] This design allows the rubber pad 7 to produce different deformation amounts when compressed by the locking screw 6. Due to the different depths of the countersunk holes 13, the compression degree of each rubber pad 7 will be different, resulting in different axial forces on each locking screw 6. This differentiated axial force design is the key to preventing the locking disk 3 from loosening.

[0069] When the locking screws 6 rotate synchronously, only under this condition can the locking disk 3 achieve axial movement. However, in normal operation, due to the different deformation amounts of the rubber pads 7, the locking screws 6 cannot move synchronously because each locking screw 6 is subject to different resistances. In this way, even in an environment with high vibration or impact, the locking disk 3 cannot be loosened due to the slight movement of the locking screws 6.

[0070] In this way, multiple countersunk holes 13 with different depths and corresponding deformation amounts of rubber pads 7 provide customized axial forces for each locking screw 6, thereby effectively realizing the anti-loosening function of the locking mechanism. This meticulous design consideration not only improves the reliability of the entire motor bearing locking protection structure, but also enhances its stability and safety under various working conditions.

[0071] In some embodiments, there are multiple locking screws 6 , and the multiple locking screws 6 are evenly distributed along the circumference of the bearing cover 2 .

[0072] In this embodiment, a plurality of locking screws 6 are evenly distributed around the bearing cover 2, and the main function of these locking screws 6 is to connect the bearing cover 2 and the locking plate 3. Through this evenly distributed layout, the locking plate 3 can be evenly locked on the bearing 10, thereby ensuring the stability of the bearing during transportation and storage. When the locking screws 6 evenly fix the locking plate 3, deformation of the bearing cover 2 or the locking plate 3 caused by uneven force distribution can be avoided, ensuring the stability and durability of the entire structure.

[0073] In addition, the evenly distributed locking screws 6 also help to improve the efficiency of installation and maintenance. When the locking plate 3 needs to be adjusted or maintained, each locking screw 6 can be operated separately without disassembling the entire structure. This design simplifies the maintenance process and reduces maintenance costs.

[0074] In practical applications, the uniform distribution of the locking screws 6 also helps to achieve precise control of the locking disk 3. By adjusting the tightening degree of the locking screws 6, the gap between the locking disk 3 and the outer oil seal 4 can be fine-tuned, thereby achieving precise control of the running clearance of the bearing 10. This precise control not only helps to improve the operating efficiency of the bearing 10, but also prolongs the service life of the bearing.

[0075] In some embodiments, the bearing cover 2 is connected to the end cover 1 by bolts 5 , and in the circumferential direction, the hole positions on the bearing cover 2 corresponding to the bolts 5 and the hole positions on the bearing cover 2 corresponding to the locking screws 6 are arranged alternately.

[0076] In this embodiment, the bearing cover 2 is fixed by a combination of bolts 5 and locking screws 6, wherein the bolts 5 are used to connect the bearing cover 2 to the end cover 1. In order to ensure the stability of the structure and provide sufficient installation flexibility, the holes on the bearing cover 2 corresponding to the bolts 5 and the holes on the bearing cover 2 corresponding to the locking screws 6 are arranged alternately.

[0077] This staggered hole layout allows the bolt 5 and the locking screw 6 to be installed and adjusted independently. The bolt 5, as a normal installation element, passes through the holes of the end cover 1 and the bearing cover 2 to fix the bearing cover 2. The locking screw 6 is installed in reverse, that is, it passes through the locking plate 3 from the inside of the bearing cover 2 to the outside to achieve axial control of the locking plate 3.

[0078] The staggered hole design ensures that the axial adjustment of the locking screw 6 will not be disturbed by the bolt 5, thereby ensuring the flexibility and reliability of the locking mechanism. At the same time, the installation and removal of the bolt 5 are also more convenient, making it easier to maintain or replace the bearing cover 2 when necessary.

[0079] In addition, this design also helps to disperse the stress on the bearing cover 2 and avoid deformation or damage due to force concentration. The independent operation capability of the bolt 5 and the locking screw 6 makes the entire structure more stable when subjected to external loads, thereby improving the durability and reliability of the motor bearing locking protection structure.

[0080] In some embodiments, in the radial direction, the outer periphery of the locking plate 3 is provided with an annular surface 301, the inner periphery of the locking plate 3 is provided with a first inclined surface 302, the inner periphery of the bearing cover 2 is provided with an annular cavity 201 that cooperates with the annular surface 301 to guide the axial movement of the locking plate 3, and the outer periphery of the outer oil seal 4 is provided with a second inclined surface 401 that cooperates with the first inclined surface 302, and the first inclined surface 302 and the second inclined surface 401 are conical surfaces.

[0081] In this embodiment, the design of the locking plate 3 includes an outer annular surface 301 and an inner first inclined surface 302. This structure, in combination with the bearing cover 2 and the outer oil seal 4, achieves efficient mechanical locking. The inner circumference of the bearing cover 2 is provided with an annular cavity 201, which cooperates with the annular surface 301 of the locking plate 3. This design provides precise guidance for the axial movement of the locking plate 3, ensuring the stability and accuracy of the movement.

[0082] The first inclined surface 302 of the locking plate 3 cooperates with the second inclined surface 401 of the outer oil seal 4. Both inclined surfaces are conical, and such cooperation can achieve mechanical locking when the locking plate 3 moves. When the locking screw 6 is driven to make the locking plate 3 move axially, the cooperation between the first inclined surface 302 and the second inclined surface 401 generates a uniform and stable force, which acts in the axial and radial directions at the same time, thereby achieving stable locking of the bearing 10.

[0083] The design of the conical surface contact makes the locking force evenly distributed, avoiding the generation of local high pressure points, which can reduce the risk of damage to the bearing 10 or other components, and also increase the service life of the locking structure. In addition, this uniform and stable force helps to improve the stability of the bearing 10 during transportation and operation, and prevent damage caused by vibration and impact.

[0084] The present application also provides a motor, including an end cover 1, a rotor 9, a bearing 10 and the above-mentioned motor bearing locking protection structure. In the radial direction, the bearing 10 and the motor bearing locking protection structure are arranged between the end cover 1 and the rotor 9, and in the axial direction, the motor bearing locking protection structure is arranged at one end of the bearing 10.

[0085] The motor includes the above-mentioned motor bearing locking and protection structure and should have all the beneficial effects of the above-mentioned motor bearing locking and protection structure.

[0086] The carbon brush 8 is fixed on the bearing cover 2 with a simple interference fit structure, which can guide the shaft current to the end cover 1 and then to the earth through the grounding point of the machine base to avoid electrical corrosion caused by flowing through the bearing 10; the bearing cover 2 is installed on the end cover 1 by six bolts 5, and the locking plate 3 is fastened to the bearing cover 2 by six locking screws 6; the locking screws 6 are reversely installed in the countersunk holes 13 of the bearing cover 2, and the depths h of the six countersunk holes 13 of the bearing cover 2 can be designed to have different values, and the rubber pads 7 at the corresponding positions produce different deformations, providing different axial forces for each locking screw 6 (the locking plate 3 can only move axially when the six locking screws rotate synchronously; and the six locking screws cannot move synchronously under the action of different deformations of the rubber pads), thereby achieving the effect of preventing loosening.

[0087] The inclined surfaces of the locking plate 3 and the outer oil seal 4 are designed to have an angle of a, and a normal matching clearance of △. In actual use, the protective function of the bearing 10 is achieved through the inclined surfaces of these two components.

[0088] In a specific implementation, for the product running state, the locking disk 3 and the bearing cover 2 are matched with a small clearance, that is, the clearance between the annular cavity 201 and the annular surface 301 is smaller than the radial clearance of the bearing 10, the locking screw 6 is reversed and tightened, and the anti-loosening effect is achieved through the rubber pad 7 and the different depths h of the countersunk holes 13 of the bearing cover 2. The normal matching clearance between the locking disk 3 and the external oil seal 4 is △, providing a labyrinth clearance for the sealing and air pressure balance of the bearing 10 to ensure the normal operation of the bearing 10.

[0089] For the transport locking state, the locking disk 3 is pushed out axially by the locking screw 6 with an inner hexagon socket, and the inclined surface of the locking disk 3 forms a mechanical contact with the inclined surface of the outer oil seal 4. The interaction force is perpendicular to the direction of the inclined surface and can be decomposed into two components: radial force and axial force.

[0090] In the radial direction, the outer circle of the locking plate 3, i.e., the annular surface 301, contacts the inner circle of the bearing cover 2, i.e., the inner wall of the annular cavity 201, and supports the rotor 9 to unload the load of the bearing 10. The locking plate 3 temporarily replaces the supporting function of the bearing 10, so that the force on the bearing 10 is zero, thereby achieving the purpose of protecting the bearing 10. In the axial direction, the rotor 9 is axially pressed against the ball bearing, i.e., the bearing 10, and locked. During the locking process, the inclined surfaces of the locking plate 3 and the outer oil seal 4 are in contact. After the axial displacement of the rotor 9 reaches the positioning size, the magnitude of the locking force is proportional to the tightening torque of the locking screw 6. Therefore, the interaction force between the inclined surfaces of the locking plate 3 and the outer oil seal 4 can ensure that the bearing 10 is in a completely locked state, which plays a role in transportation protection. The inclined surfaces of the locking plate 3 and the outer oil seal 4 are in contact with each other, and the force is uniform and stable, and the locking effect is good.

[0091] For the switching between the product operation state and the transportation locking state, in the operation state, the six locking screws 6 are tightened evenly, the locking plate 3 is away from the outer oil seal 4, and a labyrinth gap is formed between the matching inclined surfaces of the two, thus reaching the operation state. The locking plate 3 is finally fastened to the bearing cover 2. Since the outer circle of the locking plate 3 and the bearing cover 2 only have axial and rotational freedom, and the locking screws 6 only have rotational freedom, the locking plate 3 will only loosen axially when the six locking screws 6 rotate synchronously. When the six locking screws 6 are not synchronized, the outer circle of the locking plate 3 will tilt, thereby generating axial motion interference to prevent loosening and achieve the maintenance of the operating state. To achieve the transportation locking function, it is only necessary to reversely unscrew the six locking screws 6 to push out the locking plate 3, so that the locking plate 3 and the inclined surface of the outer oil seal 4 are in mechanical contact, and a certain tightening torque is applied.

[0092] In a specific embodiment, the motor bearing locking protection structure of the present application is integrated on the bearing cover 2, and the anti-loosening requirements of the bolts are taken into consideration from the perspective of structural design, ensuring stable state and free switching, simplifying the operation process, making the operation simpler, and suitable for very limited structural space and operating space. The conversion between the product operation state and the transport locking state has nothing to do with the installation form, installation state, and transmission structure of the traction motor, but is only strongly related to the structure of the traction motor itself, and the motor bearing locking protection structure of the present application can be shared by the whole vehicle transportation and single motor transportation, without limiting the transportation form. At the same time, the conversion between the product operation state and the transport locking state does not affect the grounding function of the carbon brush.

[0093] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0094] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0095] The motor bearing locking protection structure and the motor provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A motor bearing locking protection structure, integrated in the motor, characterized in that: The motor bearing locking protection structure comprises: A bearing cover is arranged on the end cover of the motor, wherein the bearing cover is provided with a countersunk hole on a side facing the end cover, and the bearing cover is provided with a through hole connected to the countersunk hole and leading to a side of the bearing cover facing away from the end cover; External oil seal, installed on the rotor of the motor; A locking plate, arranged on a side of the bearing cover facing away from the end cover; A locking screw is arranged on the bearing cover, the head of the locking screw is arranged in the countersunk hole, the rod of the locking screw passes through the through hole and is threadedly connected with the locking disk, the end of the rod passes through the locking disk, and an operating structure is arranged on the end of the rod. The locking screw is rotated by the operating structure to drive the locking disk to move axially, control the locking disk to lock the rotor of the compression bearing when it abuts against the outer oil seal, and control the locking disk to form a running gap when it is separated from the outer oil seal.

2. The motor bearing locking and protection structure according to claim 1, characterized in that: The outer oil seal and the locking plate are matched with each other at a radial bevel, the rotor includes a rotating shaft provided with a shoulder, the bearing is arranged in the shoulder of the rotating shaft, and the outer oil seal is located on the side of the bearing away from the shoulder; in the direction from the outer oil cover to the bearing, the outer oil seal and the bevel of the locking plate are inclined radially toward one side of the rotating shaft, so that when the locking plate moves away from the bearing cover, the bearing is axially locked between the shoulder and the outer oil seal.

3. The motor bearing locking and protection structure according to claim 1, characterized in that: The bearing cover is also provided with a carbon brush, which is extended toward the rotor and is used to guide the shaft current of the rotor to the end cover.

4. The motor bearing locking and protection structure according to claim 1, characterized in that: The operating structure is a hexagonal hole.

5. The motor bearing locking and protection structure according to claim 1, characterized in that: A rubber pad is arranged in the countersunk hole, and two ends of the rubber pad abut against the end cover and the head.

6. The motor bearing locking and protection structure according to claim 5, characterized in that: The number of the countersunk holes, the locking screws and the rubber pads are all multiple, and the multiple countersunk holes have two or more depth dimensions to achieve different deformation amounts of the multiple rubber pads, so that the multiple locking screws are subjected to different axial forces to prevent the locking disk from loosening.

7. The motor bearing locking and protection structure according to claim 1, characterized in that: There are multiple locking screws, and the multiple locking screws are evenly distributed along the circumference of the bearing cover.

8. The motor bearing locking and protection structure according to claim 7, characterized in that: The bearing cover is connected to the end cover by bolts. In the circumferential direction, the hole positions on the bearing cover corresponding to the bolts and the hole positions on the bearing cover corresponding to the locking screws are arranged alternately.

9. The motor bearing locking and protection structure according to claim 1, characterized in that: In the radial direction, the outer periphery of the locking plate is provided with an annular surface, the inner periphery of the locking plate is provided with a first inclined surface, the inner periphery of the bearing cover is provided with an annular cavity matching with the annular surface to guide the axial movement of the locking plate, and the outer periphery of the outer oil seal is provided with a second inclined surface matching with the first inclined surface, and the first inclined surface and the second inclined surface are conical surfaces.

10. A motor, characterized in that: It includes an end cover, a rotor, a bearing and a motor bearing locking protection structure as described in any one of claims 1 to 9, wherein in the radial direction, the bearing and the motor bearing locking protection structure are arranged between the end cover and the rotor, and in the axial direction, the motor bearing locking protection structure is arranged at one end of the bearing.

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