Motor bearing locking protection structure and motor

Abstract

The utility model 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 field of motor technology, and in particular to a motor bearing locking protection structure and a motor. Background Art

[0002] In modern industrial applications, motors, as key power conversion components, are widely used in various machinery and equipment. Their performance and reliability directly impact the stability and safety of the entire system. During transportation and storage, vibration and impact can cause bearing displacement, leading to bearing damage or failure, thus compromising overall motor performance. Furthermore, electrical corrosion during motor operation is a major cause of premature bearing failure.

[0003] At present, the protection structure of motor bearings has some obvious shortcomings. Traditional protection solutions usually rely on external tooling or complex mechanical structures to fix the bearings. These methods are often closely related to the shaft head of a specific size and lack versatility. In addition, these solutions have problems such as difficult installation, complex operation and high cost in actual operation. For whole vehicle transportation, although the decoupling method is feasible, it requires the disassembly of multiple components, which increases the complexity and time cost of the operation. More importantly, existing protection solutions 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. Utility Model Content

[0004] The purpose of this 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 objectives, the present application provides a motor bearing locking and protection structure integrated into the motor, the motor bearing locking and protection structure comprising:

[0006] A bearing cover is provided 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 communicating with 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 is provided on the side of the bearing cover facing away from the end cover;

[0009] A locking screw is provided on the bearing cover, the head of the locking screw is provided in the countersunk hole, the rod of the locking screw passes through the through hole and is threadedly connected to the locking disk, the end of the rod passes through the locking disk, and an operating structure is provided 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 radially inclined 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 socket.

[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 is multiple, and the multiple countersunk holes have two or more depth sizes 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.

[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 staggered.

[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 that cooperates 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 that cooperates 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 into the motor. 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. 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 to the locking plate, and the end of the rod passes through the locking plate. 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, control the locking plate to lock the rotor of the compression bearing when it abuts against the external oil seal, and control the locking plate to form a running gap when it is separated from the external oil seal.

[0020] In traditional motor designs, bearing fixation typically relies on complex external fixtures or structures. These methods are not only difficult and costly to install, but also lack sufficient versatility to accommodate motor bearings of varying sizes and types. Furthermore, these traditional structures often overlook the issue of electrical corrosion, leading to premature bearing failure and compromising motor reliability and safety.

[0021] To address these shortcomings, the motor bearing locking protection structure provided in this 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, driving 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 disc abuts the outer oil seal, the bearing rotor is locked and compressed, preventing bearing displacement and damage caused by vibration and impact during transportation and storage. When the locking disc and outer oil seal are separated, the necessary running clearance is established to ensure normal operation of the bearing. This structural design not only simplifies installation and maintenance, reducing costs, but also improves the protection of motor bearings. Furthermore, the universal design of this structure allows 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 the integrated motor bearing locking protection structure, prevents bearing displacement and damage caused by vibration and impact, and at the same time provides effective operating 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0025] Figure 1 A schematic diagram of a motor bearing locking protection structure provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A local graph of ;

[0027] Figure 3 for Figure 1 Partial graph B of ;

[0028] Figure 4 A schematic diagram of a bearing cover provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of a locking disk provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the motor bearing locking protection structure provided in an embodiment of the present application in the product operating state;

[0031] Figure 7 This is a schematic diagram of the motor bearing locking protection structure provided in an embodiment of the present application in the 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 gasket 7, carbon brush 8, rotor 9, bearing 10, rotating shaft 11, shaft shoulder 12, countersunk hole 13, through hole 14, hexagonal socket hole 15. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts 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 with reference to the accompanying drawings and specific implementation methods.

[0036] Please refer to Figures 1 to 3 ,in, Figure 1 A schematic diagram of a motor bearing locking protection structure provided in an embodiment of the present application, Figure 2 for Figure 1 A local graph of Figure 3 for Figure 1 Partial graph B of .

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

[0038] In traditional motor designs, bearing fixation typically relies on complex external fixtures or structures. These methods are not only difficult and costly to install, but also lack sufficient versatility to accommodate motor bearings of varying sizes and types. Furthermore, these traditional structures often overlook the issue of electrical corrosion, leading to premature bearing failure and compromising motor reliability and safety.

[0039] In response to these defects, the motor bearing locking protection structure provided in this 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 outer 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 outer oil seal 4, and realizing the locking and release of the bearing 10 and the rotor 9.

[0040] When the locking disk 3 abuts the outer oil seal 4, the bearing 10 and rotor 9 are locked and compressed, preventing displacement and damage to the bearing 10 caused by vibration and impact during transportation and storage. When the locking disk 3 separates from the outer oil seal 4, the necessary operating clearance is established, ensuring the normal operation of the bearing 10. This structural design not only simplifies installation and maintenance, reducing costs, but also improves the protection of the motor bearing 10. Furthermore, the universal design of this 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 the stable fixation of the bearing 10 during transportation and storage through the integrated motor bearing locking protection structure, prevents the displacement and damage of the bearing 10 caused by vibration and impact, and at the same time provides effective operating 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 traction motor product structure, it not only saves separate transportation protection tooling, but also eliminates the management issues of recycling and reuse, which has a great cost advantage.

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

[0044] In some embodiments, the outer oil seal 4 and the locking plate 3 are matched with each other in a radially inclined surface, the rotor 9 includes a rotating shaft 11 provided with a shaft shoulder 12, the bearing 10 is arranged in the shaft 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 shaft shoulder 12; in the direction in which the outer oil seal 4 faces the bearing 10, the inclined surface of the outer oil seal 4 and the locking plate 3 are radially inclined 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 axially locked between the shaft shoulder 12 and the outer oil seal 4.

[0045] In this embodiment, rotor 9 comprises a shaft 11 and a shoulder 12, with bearing 10 mounted within shoulder 12 of shaft 11. This design allows bearing 10 to have a clear mounting position on shaft 11. External oil seal 4 is located on one side of bearing 10, opposite shoulder 12. This arrangement protects bearing 10 from the intrusion of contaminants while also helping to maintain lubrication.

[0046] The radially inclined surface between the locking plate 3 and the outer oil seal 4 is a key feature of this design. This inclined surface allows the locking plate 3 to push against the outer oil seal 4 as it moves away from the bearing cap 2. The thrust generated by the inclined surface axially compresses the bearing 10 between the shaft shoulder 12 and the outer oil seal 4. This locking mechanism not only provides a simple and effective bearing securing method, but also achieves self-positioning and tightening of the bearing 10 through the inclined surface design.

[0047] To secure bearing 10 in a specific position, tightening screw 6 is rotated, pushing locking plate 3 axially along rotating shaft 11. This movement of locking plate 3 changes its relative position to outer oil seal 4, compressing bearing 10 and providing a secure fixation. This design reduces the risk of bearing 10 displacement due to vibration and impact during transportation and storage, thereby improving motor reliability.

[0048] Furthermore, the inclined surface design allows for an appropriate gap to form between the outer oil seal 4 and the locking disk 3 when the locking disk 3 is released. This provides the necessary operating space for the bearing 10, ensuring 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 operational requirements of the bearing 10, embodying an efficient and reliable design approach.

[0049] by Figure 6 and Figure 7 For example, 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, so that the load of the bearing 10 is unloaded. 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 axially pressed against the bearing 10 and locked. During the locking process, the inclined surfaces of the locking plate 3 and the outer oil seal 4 come into contact. After the axial displacement of the rotor 9 reaches the positioning dimension, the locking force is proportional to the tightening torque of the locking screw 6.

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

[0053] In some embodiments, the bearing cover 2 is further provided with a carbon brush 8 , which extends toward the rotor 9 . 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 carbon brushes 8, which is an important design improvement because it adds the function of preventing shaft electrical corrosion to the motor bearing locking protection structure. The carbon brushes 8 are specifically extended toward the rotor 9, thereby effectively collecting the shaft current generated by the rotor 9.

[0055] When the motor is running, shaft currents may be generated in the rotor 9 for various reasons. If these currents are not controlled, they can be conducted through the bearings 10, causing so-called galvanic corrosion, which can reduce the service life and performance of the bearings 10. To reduce this risk, carbon brushes 8 are used to direct these shaft currents from the rotor 9 to the end shield 1.

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

[0057] In this way, the coordinated use of carbon brushes 8 and end caps 1 not only improves the reliability of the motor and the durability of bearings 10, but also simplifies motor maintenance and operation. This design embodies a comprehensive solution that considers multiple factors affecting motor operation, ensuring stable operation of the motor in various environments.

[0058] by Figure 6 For 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 socket 15 .

[0060] The reverse installation of locking screw 6 offers significant functional advantages. When locking screw 6 rotates, it does not itself move axially. Instead, the threaded mechanism drives the locking disc 3 axially. This design allows the locking screw 6 to control the position of the locking disc 3 by rotating it without requiring axial movement of the locking screw 6 itself, effectively preventing the locking screw 6 from falling out.

[0061] When tightening or releasing bearing 10, the hexagonal locking screw 6 is rotated to achieve axial movement of the locking plate 3. The inclined surface of the locking plate 3 forms mechanical contact with the inclined surface of the outer oil seal 4, achieved through the rotation of the locking screw 6 and the axial movement of the locking plate 3. When the locking plate 3 pushes out and contacts the outer oil seal 4, it generates sufficient force to compress the bearing 10 against the rotor 9, thereby securing and protecting 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 provided in the counterbore 13 , and both ends of the rubber pad 7 abut against the end cover 1 and the head.

[0064] In this embodiment, the rubber pad 7 is incorporated to enhance the stability and reliability of the entire locking structure. Its primary function is to compress the locking screw 6, preventing it from shifting or loosening due to vibration or other external forces. Because the locking screw 6 may be subject to axial and radial forces during operation, the rubber pad 7, through its elastic properties, provides a certain preload force, ensuring that the locking screw 6 is securely fixed within the countersunk hole 13.

[0065] The elastic compression of rubber pad 7 creates a tight seal between the head of locking screw 6 and end cap 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 locking screw 6, rubber pad 7 can provide a reverse buffering 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 sizes to enable the multiple rubber pads 7 to produce different deformation amounts, so that the multiple locking screws 6 are subjected to different axial forces to prevent the locking disk 3 from loosening.

[0067] In this embodiment, to further enhance the stability of the locking mechanism, the design employs multiple countersunk holes 13, corresponding multiple locking screws 6, and multiple 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 depths.

[0068] This design allows the rubber pad 7 to deform differently when compressed by the locking screw 6. Due to the varying depths of the countersunk holes 13, each rubber pad 7 experiences a different degree of compression, resulting in a different axial force acting on each locking screw 6. This differentiated axial force design is key to preventing the locking disc 3 from loosening.

[0069] Locking disc 3 can only achieve axial movement when locking screws 6 rotate synchronously. However, during normal operation, due to the varying deformation of rubber pads 7, the individual locking screws 6 cannot move synchronously, as each encounters a different amount of resistance. This prevents locking disc 3 from loosening due to even minor movement of locking screws 6, even in environments subject to high vibration or shock.

[0070] In this way, multiple countersunk holes 13 of varying depths, combined with correspondingly deformed rubber pads 7, provide customized axial force to each locking screw 6, effectively preventing the locking mechanism from loosening. This meticulous design not only improves the reliability of the entire motor bearing locking and protection structure, but also enhances its stability and safety under various operating 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, multiple locking screws 6 are evenly distributed around the circumference of the bearing cap 2. These locking screws 6 primarily connect the bearing cap 2 and the shrink disk 3. This evenly distributed arrangement ensures uniform locking of the shrink disk 3 against the bearing 10, thereby ensuring bearing stability during transportation and storage. When the locking screws 6 evenly secure the shrink disk 3, deformation of the bearing cap 2 or shrink disk 3 due to uneven force distribution is avoided, ensuring the stability and durability of the entire structure.

[0073] Furthermore, the evenly distributed locking screws 6 help improve installation and maintenance efficiency. When the locking disc 3 needs to be adjusted or maintained, each locking screw 6 can be operated individually without disassembling the entire structure. This design simplifies maintenance and reduces costs.

[0074] In practice, the even distribution of locking screws 6 also facilitates precise control of the locking disk 3. By adjusting the tightening of 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 operating clearance of the bearing 10. This precise control not only helps improve the operating efficiency of the bearing 10, but also extends the bearing's service life.

[0075] In some embodiments, the bearing cover 2 is connected to the end cover 1 by bolts 5. In the circumferential direction, 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 staggered.

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

[0077] This staggered hole layout allows bolts 5 and locking screws 6 to be installed and adjusted independently. Bolts 5, as normal installation components, pass through holes in end cap 1 and bearing cap 2 to secure bearing cap 2. Locking screws 6, on the other hand, are installed in reverse, passing through locking disc 3 from the inside of bearing cap 2 to the outside, providing axial control of locking disc 3.

[0078] The staggered hole design allows the axial adjustment of the locking screw 6 to be uninterrupted by the bolt 5, 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] This design also helps disperse stress on the bearing cap 2, preventing deformation or damage due to concentrated force. The independent operation of the bolt 5 and the locking screw 6 makes the entire structure more stable when subjected to external loads, 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. The first inclined surface 302 and the second inclined surface 401 are conical surfaces.

[0081] In this embodiment, the design of the locking disk 3 includes an outer annular surface 301 and an inner first inclined surface 302. This structure, combined with the bearing cap 2 and outer oil seal 4, achieves efficient mechanical locking. The inner circumference of the bearing cap 2 is provided with an annular cavity 201, which mates with the annular surface 301 of the locking disk 3. This design provides precise guidance for the axial movement of the locking disk 3, ensuring smooth and accurate movement.

[0082] First bevel 302 of locking plate 3 mates with second bevel 401 of outer oil seal 4. Both bevels are conical, and this fit enables mechanical locking when locking plate 3 moves. When locking screw 6 is driven, causing locking plate 3 to move axially, the fit between first bevel 302 and second bevel 401 generates a uniform and stable force that acts both axially and radially, thereby achieving stable locking of bearing 10.

[0083] The conical contact design evenly distributes the locking force, avoiding localized high-pressure points. This reduces the risk of damage to the bearing 10 or other components, while also extending the life of the locking mechanism. Furthermore, this uniform and stable force distribution helps improve the stability of the bearing 10 during transportation and operation, preventing 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 protective structure and should have all the beneficial effects of the above-mentioned motor bearing locking and protective 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, so as 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 reversed and installed in the countersunk holes 13 of the bearing cover 2. The depths h of the six countersunk holes 13 of the bearing cover 2 can be designed to 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 surface of the locking plate 3 and the outer oil seal 4 is designed to have an angle of a, and the normal fit clearance is △. In actual use, the protection function of the bearing 10 is achieved by the inclined surfaces of these two components.

[0088] In one specific embodiment, during product operation, the locking disc 3 and the bearing cap 2 utilize a small clearance fit. Specifically, the clearance between the annular cavity 201 and the annular surface 301 is less than the radial clearance of the bearing 10. The locking screw 6 is tightened in reverse, and the rubber pad 7 and the varying depths h of the countersunk holes 13 in the bearing cap 2 provide a preventive effect. The normal clearance between the locking disc 3 and the external oil seal 4 is Δ, providing a labyrinthine clearance for sealing and air pressure balance in the bearing 10, ensuring proper operation.

[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 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 disc 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, supporting the rotor 9 to unload the load of the bearing 10. The locking disc 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 compressed and locked on the ball bearing 10. During the locking process, the inclined surfaces of the locking disc 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 disc 3 and the outer oil seal 4 can ensure that the bearing 10 is in a completely locked state, playing a role in transportation protection. The inclined surfaces of the locking disc 3 and the outer oil seal 4 are in contact with each other, with uniform and stable force and good locking effect.

[0091] To switch between the product's operating state and transport locking state, in the operating state, evenly tighten the six locking screws 6, and the locking disc 3 moves away from the outer oil seal 4, forming a labyrinth gap between their mating inclined surfaces, thus achieving the operating state. The locking disc 3 is ultimately fastened to the bearing cover 2. Since the outer diameter of the locking disc 3 and the bearing cover 2 only have axial and rotational freedom of fit, while the locking screws 6 only have rotational freedom, the locking disc 3 will only loosen axially when the six locking screws 6 rotate synchronously. When the six locking screws 6 are not synchronized, the outer diameter of the locking disc 3 will tilt, resulting in axial motion interference to prevent loosening and maintain the operating state. To achieve the transport locking function, simply reverse the six locking screws 6 to push out the locking disc 3, so that the locking disc 3 and the inclined surface of the outer oil seal 4 are in mechanical contact, and apply a certain tightening torque.

[0092] In a specific embodiment, the motor bearing locking protection structure of the present application is integrated into the bearing cover 2. At the same time, the anti-loosening requirements of the bolts are taken into consideration in the structural design to ensure stable state and free switching, simplify the operation process, and make the operation simpler. It is suitable for very limited structural space and operating space. The conversion between the product operation state and the transport locking state is unrelated to the installation form, installation state, and transmission structure of the traction motor, and is only strongly related to the structure of the traction motor itself. Moreover, 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 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 above is a detailed introduction to the motor bearing locking protection structure and the motor provided by the present application. This article uses specific examples 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 into the motor, characterized in that: The motor bearing locking protection structure includes: A bearing cover is provided 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 communicating with 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 is provided on the side of the bearing cover facing away from the end cover; A locking screw is provided on the bearing cover, the head of the locking screw is provided in the countersunk hole, the rod of the locking screw passes through the through hole and is threadedly connected to the locking disk, the end of the rod passes through the locking disk, and an operating structure is provided 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 an inclined surface in the radial direction. The rotor includes a rotating shaft provided with a shoulder. The bearing is provided in the shoulder of the rotating shaft. 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 inclined surface of the outer oil seal and the locking plate are inclined toward one side of the rotating shaft in the radial direction, 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 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.

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 provided 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 is multiple, and the multiple countersunk holes have two or more depth sizes, so that the multiple rubber pads produce different deformation amounts, 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 that cooperates 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 that cooperates 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 according to 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.

Images