Bearing pressing plate assembly and motor

Abstract

The utility model provides a bearing pressing plate assembly and a motor. The bearing pressing plate assembly comprises a pressing plate body, an oil injection ring and a conducting ring, wherein the pressing plate body is used for pressing a motor bearing on an end cover; the oil injection ring and the conducting ring are fixedly arranged on the pressing plate body, an oil inlet of the oil injection ring corresponds to an oil outlet in the end cover, and the conducting ring corresponds to a rotating shaft of the motor; when the pressing plate body is installed on the end cover in place, the oil inlet and the oil outlet are in butt joint and communicated, and the conductive ring forms conductive connection between the rotating shaft and the end cover. According to the bearing pressing plate assembly provided by the utility model, the oil injection ring and the conducting ring are integrally arranged on the pressing plate body of the bearing pressing plate assembly, so that the oil injection ring and the conducting ring can be conveniently assembled inside the motor while the pressing plate body is mounted, and a mounting structure scheme that the oil injection ring and the conducting ring are arranged inside the motor is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and in particular to a bearing pressure plate assembly. In addition, the utility model also relates to a motor. Background Art

[0002] With the rapid development of new energy vehicles, the electric drive system assembly is developing towards high power density, high speed and integration. As the main component of the electric drive system, the motor needs to be more miniaturized and integrated, and the requirements for the motor cooling system are getting higher and higher. At present, some oil-cooled motors add an oil injection ring on the inner side of the end of the stator winding, and cool the motor by spraying oil through the oil injection hole. The oil injection ring needs to be fixed on the motor housing or end cover to ensure the accurate position of the oil injection. At the same time, high-voltage motors need to install conductive rings or carbon brushes on the motor to avoid the electrical corrosion of the bearing caused by the shaft current.

[0003] Existing motors that use oil injection rings for oil cooling need to ensure the accuracy of the oil injection position and have high requirements for the position accuracy of the oil injection holes. However, as thin-walled parts, the oil injection rings are very difficult to process and manufacture, and the ring forming accuracy is difficult to control. At the same time, fixed points need to be added to the motor housing or end cover to ensure the position. During the assembly process, care must also be taken to prevent the fixed points from rotating and shifting to avoid deformation of the oil injection ring that affects the cooling effect.

[0004] At the same time, in order to prevent electrical corrosion of the bearings, the existing motors need to install conductive rings, and also need to add assembly positions on the motor housing or end cover to accommodate the conductive rings, which increases the axial length of the motor and the processing cost of the motor. It also needs to be installed separately, which increases the difficulty and cost of assembly.

[0005] It is precisely because the oil injection ring and the conductive ring need to be assembled at similar positions at the same time that the assembly conditions of the corresponding parts on the motor housing are poor, making the structural design of the oil injection ring and the conductive ring, as well as their installation structure design on the motor housing more difficult; and the assembly of the oil injection ring and the conductive ring on the motor housing is more difficult. Utility Model Content

[0006] In view of this, the utility model aims to propose a bearing pressure plate assembly to provide a mounting structure solution for arranging an oil injection ring and a conductive ring inside a motor.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A bearing pressure plate assembly,

[0009] It includes a pressing plate body for pressing the motor bearing on the end cover, an oil injection ring and a conductive ring;

[0010] The oil injection ring and the conductive ring are both fixedly mounted on the pressure plate body, and the oil inlet of the oil injection ring is arranged corresponding to the oil outlet on the end cover, and the conductive ring is arranged corresponding to the rotating shaft of the motor; when the pressure plate body is installed in place on the end cover, the oil inlet is connected to the oil outlet, and the conductive ring constitutes a conductive connection between the rotating shaft and the end cover.

[0011] Furthermore, the pressure plate body includes a base plate for connecting the end cover, and a pressure ring integrally formed on the base plate; a through hole for the rotating shaft to pass through is provided in the middle of the base plate, and the pressure ring is located at the edge of the through hole; the conductive ring is provided on the pressure ring.

[0012] Furthermore, the pressure ring includes a bearing pressing portion for pressing the motor bearing, and a raised portion protruding relative to the substrate toward a side away from the motor bearing; and a mounting groove for mounting the conductive ring is provided on the raised portion.

[0013] Furthermore, the conductive ring includes a mounting portion inserted into the mounting groove, and a plurality of conductive portions arranged on the mounting portion; each of the conductive portions is distributed at intervals along the circumference of the motor bearing and extends in the direction of the motor bearing; as the pressure plate body is installed in place on the end cover, the conductive portion contacts the circumferential surface of the motor bearing.

[0014] Furthermore, the oil injection ring is sleeved on the outside of the raised portion and is abutted and connected to the outer peripheral surface of the raised portion and the surface of the substrate.

[0015] Furthermore, a plurality of mounting ears are arranged at the edge of the base plate, and mounting holes for connecting the end cover are opened on the mounting ears.

[0016] Furthermore, the oil injection ring comprises a tube body in the shape of an annular ring, the oil inlet is arranged on the tube body; the flow channel inside the tube body is connected to the oil inlet, and a plurality of oil injection holes connected to the flow channel are arranged at intervals on the tube body.

[0017] Furthermore, a mounting seat is provided on the pressure plate body, and an oil injection ring fixing hole is provided on the mounting seat; the tube body is inserted into the oil injection ring fixing hole.

[0018] Furthermore, each of the oil injection holes is divided into two groups, the oil outlet direction of one group of the oil injection holes is arranged toward the stator armature end of the motor, and the oil outlet direction of the other group of the oil injection holes is arranged toward the rotor of the motor.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The bearing pressure plate assembly of the utility model integrates the oil injection ring and the conductive ring on the pressure plate body of the bearing pressure plate assembly, and fixes the positions of the oil injection ring and the conductive ring on the pressure plate body. After the pressure plate body is installed in place, the oil inlet of the oil injection ring and the oil outlet on the end cover are connected to each other, and the conductive connection between the rotating shaft and the end cover of the conductive ring is realized. Therefore, when the pressure plate body is installed, the oil injection ring and the conductive ring can be conveniently assembled into the motor, and a mounting structure scheme for setting the oil injection ring and the conductive ring inside the motor is provided. The bearing pressure plate assembly of the utility model can not only realize the cooling of the motor, but also enable the shaft current on the rotating shaft to reach the end cover through the conductive ring and the pressure plate body, so as to eliminate the static electricity on the rotating shaft, protect the motor bearing, and avoid the shaft current passing through the motor bearing and causing the bearing to fail due to electrical corrosion.

[0021] In addition, the pressure plate body is designed to be composed of two parts: a base plate and a pressure ring, which are used for installation and connection and for pressing and fixing the motor bearings, respectively, so as to achieve good functional zoning. The conductive ring is arranged on the pressure ring, which is suitable for the situation that the pressure ring is arranged around the rotating shaft, so as to facilitate the conductive connection between the conductive ring and the rotating shaft. While the pressure ring is provided with a bearing pressing part for pressing the motor bearing, a raised part is provided, so as to facilitate the installation structure of the conductive ring on the raised part. The installation structure of the installation groove is adopted, so that the conductive ring can be inserted into the installation groove, and the assembly convenience between the conductive ring and the pressure plate body is improved.

[0022] Another object of the utility model is to provide a motor, on which the bearing pressure plate assembly of the utility model is provided. The motor of the utility model has the technical advantages possessed by the bearing pressure plate assembly described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, top and bottom involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the bearing pressure plate assembly according to an embodiment of the utility model;

[0025] Figure 2 It is a front view of the bearing pressure plate assembly according to an embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of the pressing plate body according to an embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the overall structure of the bearing pressure plate assembly according to an embodiment of the utility model installed on the end cover;

[0028] Figure 5 for Figure 4 A schematic cross-sectional view of the components shown;

[0029] Figure 6 for Figure 5 A partial enlarged view of the location of the middle mounting seat.

[0030] Description of reference numerals:

[0031] 1. Pressing plate body; 10. Base plate; 100. Mounting seat; 101. Oil injection ring fixing hole; 102. Mounting ear; 103. Mounting hole; 11. Pressing ring; 110. Bearing pressing part; 111. Protruding part; 112. Mounting groove;

[0032] 2. Oil injection ring; 20. Oil inlet; 21. Pipe body; 210. Flow channel; 211. Oil injection hole; 212. Bearing oil injection hole;

[0033] 3. conductive ring; 30. mounting portion; 31. conductive portion;

[0034] 4. Motor bearing; 5. Rotating shaft;

[0035] 6. End cover; 60. Bearing seat; 600. Bearing cavity; 61. Cooling oil channel; 610. Oil outlet. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be stated that if there are terms indicating directions or positional relationships such as "up, down, left, right, front, back, inside, outside", etc., they are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operate in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0038] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] Embodiment 1

[0041] This embodiment relates to a bearing pressure plate assembly, and provides a mounting structure scheme for arranging an oil injection ring 2 and a conductive ring 3 inside a motor; an exemplary structure thereof is as follows Figure 1 , Figure 2 and Figure 3 shown.

[0042] In general, the bearing pressure plate assembly includes a pressure plate body 1 for pressing the motor bearing 4 on the end cover 6, as well as an oil injection ring 2 and a conductive ring 3. The oil injection ring 2 and the conductive ring 3 are both fixedly mounted on the pressure plate body 1, and the oil inlet 20 of the oil injection ring 2 is arranged corresponding to the oil outlet 610 on the end cover 6, and the conductive ring 3 is arranged corresponding to the rotating shaft 5 of the motor; when the pressure plate body 1 is installed in place on the end cover 6, the oil inlet 20 is connected to the oil outlet 610, and the conductive ring 3 forms a conductive connection between the rotating shaft 5 and the end cover 6.

[0043] It should be pointed out that, based on the above-mentioned overall design concept, the technical solution of the utility model can adopt a variety of different specific implementation structures, forms or configuration sequences. For example, the above-mentioned pressure plate body 1 can adopt a variety of different specific processing methods such as integrated stamping and cutting, and its structural form also has multiple specific design schemes. For the parts required for the implementation of the overall solution but not involved in the above-mentioned overall setting, reasonable and flexible designs can be made with reference to the mature setting means in the field, the actual situation during implementation, etc. The specific implementation scheme described below in this embodiment is only one of the better solutions among the many solutions that can be formed by the above-mentioned various combinations and changes. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on the actual situation. Obviously, the many solutions that can be formed by the above-mentioned combinations and changes of various specific forms, as well as the specific implementation scheme of this embodiment, are all within the protection scope of the utility model.

[0044] Specifically, if Figure 3 As shown, in this embodiment, the pressure plate body 1 includes a base plate 10 for connecting the end cover 6, and a pressure ring 11 integrally formed on the base plate 10. Among them, a through hole is provided in the middle of the base plate 10 for the rotating shaft 5 to pass through, and the pressure ring 11 is located at the edge of the through hole; the conductive ring 3 is arranged on the pressure ring 11. The pressure plate body 1 is designed as two parts, the base plate 10 and the pressure ring 11, which are respectively used for installation and connection and for pressing and fixing the motor bearing 4, so as to achieve good functional zoning. The conductive ring 3 is arranged on the pressure ring 11, which is suitable for the situation that the pressure ring 11 is arranged around the rotating shaft 5, so as to facilitate the conductive connection between the conductive ring 3 and the rotating shaft 5.

[0045] Based on the above settings, combined with Figure 4 , Figure 5As shown, the pressure ring 11 of this embodiment includes a bearing pressing portion 110 for pressing the motor bearing 4, and a protruding portion 111 protruding relative to the base plate 10 toward the side away from the motor bearing 4. At the same time, a mounting groove 112 for mounting the conductive ring 3 is provided on the protruding portion 111. While the bearing pressing portion 110 for pressing the motor bearing 4 is provided on the pressure ring 11, the protruding portion 111 is provided to facilitate the installation structure of the conductive ring 3 on the protruding portion 111. The installation structure using the installation groove 112 facilitates the insertion of the conductive ring 3 into the installation groove 112, thereby improving the convenience of assembly between the conductive ring 3 and the pressure plate body 1.

[0046] There are of course many different structural solutions available for the arrangement of the conductive ring 3. Figure 1 , Figure 2 as well as Figure 5 As shown, the conductive ring 3 includes a mounting portion 30 inserted into the mounting groove 112, and a plurality of conductive portions 31 disposed on the mounting portion 30; each conductive portion 31 is distributed along the circumference of the motor bearing 4 at intervals and extends toward the motor bearing 4. As the pressure plate body 1 is installed in place on the end cover 6, the conductive portion 31 contacts the circumferential surface of the motor bearing 4.

[0047] A plurality of conductive parts 31 are arranged at intervals on the mounting part 30 of the conductive ring 3, and a plurality of conductive connection points can be formed between the mounting part 30 and the rotating shaft 5, thereby ensuring the reliability of the conduction between the rotating shaft 5 and the end cover 6. There are of course a variety of options for the specific arrangement of the conductive parts 31. In principle, the elastic deformation performance of each conductive part 31 should be ensured; so that an elastic contact mode is formed between the conductive part 31 and the peripheral surface of the rotating shaft 5, avoiding hard friction between the conductive part 31 and the rotating shaft 5. For example, each conductive part 31 can be made of a carbon brush, a metal spring, or other structural forms, or can be made of conductive PTFE, carbon fiber, or other materials.

[0048] It should be pointed out that the above-mentioned conductive part 31 is integrated and installed on the pressure plate body 1, and is fixed by the pressure ring 11. Each conductive part 31 contacts the rotating shaft 5, connects the rotating shaft 5, the conductive ring 3, the pressure plate body 1 and the end cover 6, so that the shaft current on the rotating shaft 5 flows out from the end cover 6, protects the motor bearing 4, and prevents the shaft current from passing through the motor bearing 4 and causing the bearing to fail due to electrical corrosion. The conductive ring 3 is integrated into the pressure plate body 1, and the pressure plate body 1 is used to form the installation framework of the conductive ring 3, which has high reliability and rationally utilizes the space in the motor. There is no need to design and process the conductive ring installation structure or installation components separately, nor is there any need to assemble the conductive ring 3 separately; the axial size of the motor is effectively shortened, which is convenient for the miniaturization design of the motor and reduces the overall manufacturing cost of the motor.

[0049] For the arrangement of the oil injection ring 2, the following structural scheme is preferably adopted. Figure 4 , Figure 5 As shown, the oil injection ring 2 of this embodiment is sleeved on the outside of the protrusion 111, and is connected to the outer peripheral surface of the protrusion 111 and the surface of the substrate 10. Based on the cylindrical structure of the protrusion 111 of the pressure ring 11, the oil injection ring 2 is sleeved on the outside of the protrusion 111, and the inner side of the oil injection ring 2 is abutted against the cylindrical outer surface of the protrusion 111, so that one side of the end of the oil injection ring 2 is abutted against the end surface of the substrate 10, which can improve the assembly stability of the oil injection ring 2 on the pressure plate body 1; because the oil injection ring 2 is a thin-walled round tube part, it is easy to deform during processing and assembly, and deformation will cause the oil injection angle of the oil injection hole 211 to change, affecting the cooling effect of the motor. With the above-mentioned abutment positioning structure, the outer peripheral surface of the protrusion 111 (i.e., the outer surface of the cylinder) and the end surface of the substrate 10 jointly form the process positioning of the oil injection ring 2, and the oil injection ring 2 with a thin-walled pipe structure is formed with the outer peripheral surface of the above-mentioned protrusion 111 as the reference during production, ensuring the roundness of the oil injection ring 2, thereby ensuring the accuracy of the position and oil outlet angle of each oil injection hole 211 on the oil injection ring 2, which is conducive to improving the cooling effect of the oil injection ring 2 on the motor. At the same time, the substrate 10 and the protrusion 111 partially wrap the oil injection ring 2 to protect the oil injection ring 2 and avoid collision during transportation or assembly, which may cause deformation of the oil injection ring 2.

[0050] Furthermore, the oil injection ring 2 of the present embodiment includes a tube body 21 in the shape of an annular ring, and an oil inlet 20 is arranged on the tube body 21; a flow channel 210 inside the tube body 21 is connected to the oil inlet 20, and a plurality of oil injection holes 211 connected to the flow channel 210 are arranged at intervals on the tube body 21. The tube body 21 of the oil injection ring 2 adopts an annular tube body structure, which is suitable for the cooling and temperature reduction conditions of the winding at the end of the stator armature inside the oil injection ring 2 and the assembly conditions on the pressure plate body 1; a plurality of oil injection holes 211 are arranged at intervals on the tube body 21, so that the cooling oil in the flow channel 210 is sprayed out through each oil injection hole 211, which can achieve a good motor cooling effect.

[0051] In order to facilitate the installation of the oil injection ring 2 on the platen body 1, a mounting seat 100 is provided on the platen body 1 of the present embodiment, and an oil injection ring fixing hole 101 is provided on the mounting seat 100; the tube body 21 is installed in the oil injection ring fixing hole 101. The arrangement of the mounting seat 100 not only provides good conditions for the installation and fixing of the oil injection ring 2 on the platen body 1, but also the oil inlet 20 of the oil injection ring 2 can be correspondingly arranged at the mounting seat 100, and the oil inlet 20 extends to the surface of the mounting seat 100 toward the side of the mounting seat 100 facing the end cover 6, and at the same time, the oil outlet 610 of the cooling oil channel 61 connected to the inside of the end cover 6 corresponds to the mounting seat 100, so that when the platen body 1 is fixed to the end cover 6, the oil outlet 610 and the oil inlet 20 can be accurately and conveniently connected, so that the cooling oil in the cooling oil channel 61 can smoothly flow into the flow channel 210 in the oil inlet 20, and then spray out from the oil injection hole 211.

[0052] In addition, in addition to the fixation of the oil injection ring 2 by the oil injection ring fixing hole 101, and the positioning of the oil injection ring 2 by the above-mentioned raised portion 111 and the end face of the base plate 10, in the present embodiment, the oil injection ring 2 is also fixed to the pressure plate body 1 by welding, and the above-mentioned installation and fixing assembly is completed when the bearing pressure plate assembly is processed, and there is no need to perform a separate fixing operation when installing the pressure plate body 1 on the end cover 6, which reduces the design and processing of the fixing points on the oil injection ring 2 fixing bracket and the end cover 6, saves the number of fasteners, and reduces the assembly process, which not only reduces the overall weight of the bearing pressure plate assembly, but also saves material costs and assembly costs.

[0053] There are of course many options for the number and position of the oil injection holes 211. Figure 1 Combined with Figure 5 , Figure 6 As shown, each oil injection hole 211 is divided into two groups, one group of oil injection holes 211 is arranged toward the end of the stator armature of the motor, and the other group of oil injection holes 211 is arranged toward the rotor of the motor. Specifically, in this embodiment, the tube body 21 of the oil injection ring 2 is a circular hollow tube, and there are fifteen oil injection holes 211 in total and divided into two groups; the first group of oil injection holes 211 is eight, arranged toward the rotor of the motor; these eight oil injection holes 211 are evenly spaced on the tube body 21, and the cooling oil is sprayed onto the rotor balance plate to cool the rotor; the second group of oil injection holes 211 is seven, arranged toward the end of the stator armature of the motor, and these seven oil injection holes 211 are evenly spaced on the tube body 21, and the cooling oil is sprayed onto the inner ring of the winding at the end of the stator armature to directly cool the winding.

[0054] In addition, in this embodiment, Figure 6 As shown, a bearing oil spray hole 212 is also provided on the tube body 21 at a position in the oil spray ring fixing hole 101. The bearing oil spray hole 212 is arranged toward the position of the motor bearing 4, and the cooling oil is sprayed from the flow channel 210 onto the balls in the motor bearing 4, thereby lubricating and cooling the motor bearing 4.

[0055] There are of course many solutions for the installation and fixing method between the pressing plate body 1 and the end cover 6. Figure 1 , Figure 2As shown, a plurality of mounting ears 102 are provided at the edge of the base plate 10, and mounting holes 103 for connecting the end cover 6 are provided on the mounting ears 102. By providing the mounting ears 102 at the edge of the base plate 10, the pressure plate body 1 can be conveniently fixed to the bearing seat 60 of the end cover 6 by fastening bolts, so that the pressure ring 11 presses the motor bearing 4 located in the bearing cavity 600 of the bearing seat 60 to press and restrict the motor bearing 4 in the bearing cavity 600. Preferably, the base plate 10 is designed to be disc-shaped, matching the shape and size of the end face of the bearing seat 60, and the mounting ears 102 are three evenly spaced along the circumference of the base plate 10. At the same time, three fixing screw holes are correspondingly provided on the bearing seat 60, and the screw holes correspond to the mounting holes 103 on the mounting ears 102. The fastening bolts pass through the mounting holes 103 and are screwed into the fixing screw holes to realize the fixing of the pressure plate body 1 on the end cover 6.

[0056] To summarize, the bearing pressure plate assembly of the present embodiment integrates the oil injection ring 2 and the conductive ring 3 on the pressure plate body 1 of the bearing pressure plate assembly, and fixes the positions of the oil injection ring 2 and the conductive ring 3 on the pressure plate body 1. After the pressure plate body 1 is installed in place, the oil inlet 20 of the oil injection ring 2 and the oil outlet 610 on the end cover 6 are connected to each other, and the conductive connection between the rotating shaft 5 and the end cover 6 of the conductive ring 3 is achieved. Therefore, when the pressure plate body 1 is installed, the oil injection ring 2 and the conductive ring 3 can be conveniently assembled into the interior of the motor, thereby providing an installation structure scheme for arranging the oil injection ring 2 and the conductive ring 3 inside the motor.

[0057] Moreover, the bearing pressure plate assembly of this embodiment can not only cool the motor, but also enable the shaft current on the rotating shaft 5 to pass through the conductive ring 3 and the pressure plate body 1 to reach the end cover 6, so as to eliminate static electricity on the rotating shaft 5, protect the motor bearing 4, and prevent the shaft current from passing through the motor bearing 4 and causing electrical corrosion failure of the bearing.

[0058] Embodiment 2

[0059] This embodiment relates to a motor, on which the bearing pressure plate assembly provided in the first embodiment is provided.

[0060] It can be seen that after the bearing pressure plate assembly of the utility model is applied to the motor, direct oil spray cooling of the rotor core and stator winding, axial fixation and lubrication of the motor bearing 4 are realized, and the axial current of the motor shaft 5 can be diverted to prevent the motor bearing 4 from electrical corrosion. In addition, the bearing pressure plate assembly adopts an integrated design of the pressure plate body 1, the oil spray ring 2 and the conductive ring 3, which reduces the difficulty of processing and assembling the oil spray ring 2, better guarantees the position accuracy of the oil spray hole 211 of the oil spray ring 2, and thus ensures the oil spray cooling effect; reduces the number of motor fasteners, and greatly reduces the difficulty and cost of assembly. At the same time, the integrated design effectively shortens the axial size of the motor, reduces the overall weight and cost of the motor, and facilitates the miniaturization design of the motor.

[0061] The above is only a preferred embodiment of the present invention. The detailed explanation of the configuration, the examples of the specific structural setting, or the description of the assembly connection method, etc., are all for the purpose of full disclosure so that those skilled in the art can better implement the present invention, and are not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A bearing pressure plate assembly, characterized in that: It comprises a pressing plate body (1) for pressing a motor bearing (4) on an end cover (6), an oil injection ring (2) and a conductive ring (3); The oil injection ring (2) and the conductive ring (3) are both fixedly mounted on the pressure plate body (1), and the oil inlet (20) of the oil injection ring (2) is arranged corresponding to the oil outlet (610) on the end cover (6), and the conductive ring (3) is arranged corresponding to the rotating shaft (5) of the motor; As the pressure plate body (1) is installed in place on the end cover (6), the oil inlet (20) is connected to the oil outlet (610), and the conductive ring (3) forms a conductive connection between the rotating shaft (5) and the end cover (6).

2. The bearing pressure plate assembly according to claim 1, characterized in that: The pressure plate body (1) comprises a base plate (10) for connecting the end cover (6), and a pressure ring (11) integrally formed on the base plate (10); a through hole for the rotating shaft (5) to pass through is provided in the middle of the base plate (10), and the pressure ring (11) is located at the edge of the through hole; the conductive ring (3) is provided on the pressure ring (11).

3. The bearing pressure plate assembly according to claim 2, characterized in that: The pressure ring (11) comprises a bearing pressing portion (110) for pressing against the motor bearing (4), and a raised portion (111) raised relative to the base plate (10) toward a side away from the motor bearing (4); a mounting groove (112) for mounting the conductive ring (3) is provided on the raised portion (111).

4. The bearing pressure plate assembly according to claim 3 is characterized in that: The conductive ring (3) comprises a mounting portion (30) inserted into the mounting groove (112), and a plurality of conductive portions (31) arranged on the mounting portion (30); The conductive parts (31) are spaced apart along the circumference of the motor bearing (4) and extend in the direction of the motor bearing (4); when the pressure plate body (1) is installed in place on the end cover (6), the conductive parts (31) are in contact with the circumferential surface of the motor bearing (4).

5. The bearing pressure plate assembly according to claim 3, characterized in that: The oil injection ring (2) is sleeved on the outside of the raised portion (111) and is abutted and connected to the outer peripheral surface of the raised portion (111) and the surface of the substrate (10).

6. The bearing pressure plate assembly according to claim 2, characterized in that: A plurality of mounting ears (102) are arranged at the edge of the base plate (10), and mounting holes (103) for connecting the end cover (6) are provided on the mounting ears (102).

7. The bearing pressure plate assembly according to any one of claims 1 to 6, characterized in that: The oil injection ring (2) comprises a tube body (21) in the shape of an annulus, and the oil inlet (20) is arranged on the tube body (21); The flow channel (210) inside the tube body (21) is in communication with the oil inlet (20), and a plurality of oil injection holes (211) in communication with the flow channel (210) are arranged at intervals on the tube body (21).

8. The bearing pressure plate assembly according to claim 7, characterized in that: The pressure plate body (1) is provided with a mounting seat (100), and the mounting seat (100) is provided with an oil injection ring fixing hole (101); the tube body (21) is inserted into the oil injection ring fixing hole (101).

9. The bearing pressure plate assembly according to claim 7, characterized in that: The oil injection holes (211) are divided into two groups, the oil outlet direction of one group of oil injection holes (211) is arranged toward the stator armature end of the motor, and the oil outlet direction of the other group of oil injection holes (211) is arranged toward the rotor of the motor.

10. A motor, characterized in that: The motor is provided with a bearing pressure plate assembly as claimed in any one of claims 1 to 9.

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