Bearing seat and electric motor

Abstract

Provided in the embodiments of the present application are a bearing seat and an electric motor. The bearing seat comprises a seat body and a sealing ring, wherein a mounting channel is provided in the seat body in a penetrating manner in an axial direction, and at least part of the sealing ring is arranged in the mounting channel; the mounting channel and an inner side wall of the sealing ring jointly define a connecting through hole, through which a rotary shaft passes; and at least one of the sealing ring and the seat body is provided with a first hollowed-out area. The bearing seat in the embodiments of the present application is structurally divided into at least two components, namely the seat body and the sealing ring, and materials of the sealing ring and the seat body can both be selected according to the respective functions thereof to be achieved, such that the overall design redundancy and material waste of the bearing seat are reduced, and the overall weight of the bearing seat can be reduced; and one of the seat body and the sealing ring is provided with the first hollowed-out area, such that the overall weight of the bearing seat can be further reduced while ensuring the overall structural strength of the bearing seat.

Description

Bearing seat and motor

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202310789347.8 and application date June 29, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of motor technology, and in particular to a bearing seat and a motor. Background Art

[0004] As a power source, the motor's good performance and operational reliability are crucial.

[0005] In the related art, the bearing seat in the motor mainly plays the role of supporting the bearing and providing a certain sealing effect. While it is necessary to prevent dust and other impurities from entering the bearing, it is also necessary to prevent the grease of the bearing from leaking out. Therefore, the bearing seat needs to undertake many functions. However, in order to ensure the bearing capacity of the bearing seat, it is generally necessary to use high-strength materials for manufacturing. Bearing seats with this type of structure have design redundancy and waste, which makes the weight of the bearing seat relatively large.

[0006] Summary of the Invention

[0007] In view of this, the embodiments of the present application hope to provide a bearing seat and a motor that can reduce the overall weight of the bearing seat.

[0008] To achieve the above-mentioned purpose, an embodiment of the present application provides a bearing seat, comprising:

[0009] A seat body, wherein the seat body is provided with an installation passage running through the seat body in the axial direction;

[0010] A sealing ring, at least a portion of which is disposed in the mounting channel, wherein the mounting channel and the inner side wall of the sealing ring jointly define a connecting through hole, wherein the connecting through hole is used for the shaft to pass through, and a first hollowed-out area is formed on at least one of the sealing ring and the seat body.

[0011] In one embodiment, the first hollowed-out area is formed on the base body, and the first hollowed-out area on the base body includes a blind hole and / or a hollow portion.

[0012] In one embodiment, the first hollowed-out area is formed on the sealing ring, and at least a portion of the inner wall of the sealing ring is recessed to form the first hollowed-out area.

[0013] In one embodiment, at least a portion of the side wall of the installation channel protrudes to form a flange, and one axial end of the sealing ring abuts against the flange.

[0014] In one embodiment, the bearing seat includes a sealing gasket, which is sandwiched between the sealing ring and the flange.

[0015] In one embodiment, a groove is formed on one of the sidewall of the installation channel and the sealing ring, and a protrusion is formed on the other side thereof, and the protrusion cooperates with the groove to position the sealing ring and the seat.

[0016] Another embodiment of the present application provides a motor, comprising:

[0017] The bearing seat according to any one of the above embodiments;

[0018] a rotating shaft, the rotating shaft being inserted into the connecting through hole;

[0019] A bearing sleeved on the rotating shaft, wherein the outer wall of the bearing abuts against the side wall of the connecting through hole;

[0020] An outer sealing ring is sleeved on the rotating shaft, and one end of the outer sealing ring along the axial direction abuts against the end surface of the bearing to position the bearing.

[0021] In one embodiment, a second hollowed-out area is formed on the outer sealing ring.

[0022] In one embodiment, the outer sealing ring includes a main body and a sealing portion, the main body is sleeved on the rotating shaft, the sealing portion is sleeved on the main body, and at least one of the main body and the sealing portion is formed with the second hollowed-out area.

[0023] In one embodiment, the second hollowed-out area is formed on the sealing portion, and the second hollowed-out area of ​​the sealing portion is an annular groove, and an opening of the annular groove faces a side of the sealing portion away from the bearing.

[0024] In one embodiment, one end of the sealing portion close to the bearing extends radially inward to form a connecting section, and the connecting section is sandwiched between the main body and the bearing.

[0025] In one embodiment, the sealing portion is an insulating member.

[0026] In one embodiment, a plurality of step surfaces are formed on the outer side wall of the sealing portion, the step surfaces extend along the circumference of the sealing portion, and the step surfaces are gap-fitted with the sealing ring.

[0027] The present invention provides a bearing seat, comprising a seat body and a sealing ring. The seat body is used for radial and axial positioning of a bearing. The seat body is provided with an installation channel extending axially therethrough. At least a portion of the sealing ring is disposed within the installation channel. The installation channel and the inner sidewall of the sealing ring together define a connecting through-hole for receiving a rotating shaft. The connecting through-hole is provided with a first hollowed-out region. The bearing seat of the present invention utilizes the fact that different parts of the bearing seat perform different functions to separate the bearing seat into at least two components, the seat body and the sealing ring. Compared to an integrated bearing seat, the seat body and the sealing ring each perform part of the functions of the bearing seat. Thus, the material selection of the seat body and the sealing ring can be based on the functions they perform. This reduces design redundancy and material waste in the overall bearing seat and can reduce the overall weight of the bearing seat. Furthermore, the seat body and the sealing ring are only parts of the bearing seat. Compared to the entire bearing seat, the seat body and the sealing ring have smaller structural dimensions, thereby facilitating the processing to form the first hollowed-out region. Furthermore, the first hollowed-out region can further reduce the overall weight of the bearing seat while maintaining the overall structural strength of the bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of a motor according to an embodiment of the present application;

[0029] Figure 2 is an enlarged schematic diagram of point A in Figure 1;

[0030] FIG3 is a schematic structural diagram of a bearing seat according to an embodiment of the present application;

[0031] FIG4 is a schematic structural diagram of an outer sealing ring according to an embodiment of the present application;

[0032] FIG5 is a schematic structural diagram of a sealing member according to an embodiment of the present application;

[0033] FIG6 is a BB cross-sectional view in FIG5 . DETAILED DESCRIPTION

[0034] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0035] In the description of the embodiments of the present application, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] On one hand, an embodiment of the present application provides a motor. Please refer to FIG1 . The motor 100 includes a rotating shaft 20 , a bearing 30 , an outer sealing ring 40 , and a bearing seat 10 according to any embodiment of the present application.

[0037] The type of the motor 100 is not limited, and for example, it can be an electromagnetic motor, a DC motor, a permanent magnet motor, a brushless DC motor, or the like.

[0038] The rotating shaft 20 is the power output component of the motor 100. Specifically, the motor 100 may further include an outer covering 50 and a rotor assembly 60. The outer covering 50 includes a stator assembly 52. ​​The rotor assembly 60 is sleeved on the rotating shaft 20. The stator assembly 52 can generate a rotating magnetic field. The rotor assembly 60 rotates under the action of the rotating magnetic field and drives the rotating shaft 20 to rotate synchronously, thereby realizing power output.

[0039] It can be understood that after the stator assembly 52 generates a rotating magnetic field, there will be a certain adsorption force. In order to prevent dust and other impurities from entering the interior of the motor 100, in some embodiments, the outer cover 50 also includes an end cover 51. The number of end covers 51 can be two, and the two end covers 51 are respectively arranged at the two axial ends of the stator assembly 52. ​​The end cover 51 and the stator assembly 52 are arranged to form a cavity. The rotor assembly 60 is arranged in the cavity. During the operation of the motor 100, dust and other impurities will not enter the interior of the stator assembly 52. ​​In this way, the reliability of the operation of the motor 100 is improved.

[0040] The bearing 30 is sleeved on the rotating shaft 20 to support the rotating shaft 20 and ensure the stability of the rotating shaft 20 during operation.

[0041] The installation position of the bearing 30 is not limited. For example, referring to FIG1 and FIG2 , a bearing chamber 51 a is provided on the end cover 51 to facilitate the installation of the bearing 30 .

[0042] It should be noted that the sizes of the two bearings 30 at the axial ends of the motor 100 may be the same or different.

[0043] It can be understood that one axial end of the rotating shaft 20 needs to be connected to an external driven member to achieve power output. This end carries a larger load than the other end of the rotating shaft 20. Therefore, the bearing 30 can be reasonably selected according to the load size carried by the rotating shaft 20. While ensuring the operating reliability of the rotating shaft 20, the cost of the motor 100 can also be reduced.

[0044] The outer sealing ring 40 is sleeved on the rotating shaft 20, and one axial end of the outer sealing ring 40 abuts against the end face of the bearing 30 to position the bearing 30. For example, during installation, the bearing 30 is generally inserted from one end of the rotating shaft 20 and moved to the target installation position from the other end. In other words, the bearing 30 can move on the rotating shaft 20 between the end where the bearing 30 is inserted and the target installation position. After the bearing 30 reaches the target installation position, the outer sealing ring 40 abuts against the surface of the bearing 30 facing the insertion end. In this way, the bearing 30 is restricted from moving toward the insertion end, and the bearing 30 can be stably installed in the target installation position, thereby ensuring the reliability of the operation of the motor 100.

[0045] It is understandable that, in some embodiments, the outer sealing ring 40 can rotate synchronously with the rotating shaft 20 .

[0046] Referring to Figures 1 to 3 , the bearing housing 10 is formed with a connecting through-hole 10a, which extends axially through both ends of the bearing housing 10. The rotating shaft 20 is disposed within the connecting through-hole 10a, and the outer wall of the bearing 30 abuts against the sidewall of the connecting through-hole 10a. In other words, the bearing 30 is sandwiched between the rotating shaft 20 and the bearing housing 10, providing support for the bearing 30 while also ensuring radial positioning of the bearing 30.

[0047] Exemplarily, the bearing 30 includes an inner ring (not shown) and an outer ring (not shown). The outer ring can be axially positioned by the bearing seat 10 and the end cover 51 , and the inner ring can be axially positioned by the outer sealing ring 40 and the rotating shaft 20 .

[0048] It is understood that when the bearing chamber 51a is provided on the end cap 51, at least a portion of the bearing seat 10 can also extend into the bearing chamber 51a. For example, referring to Figures 1 and 2, the outer wall of the portion of the bearing seat 10 extending into the bearing chamber 51a abuts against the circumferential sidewalls of the bearing chamber 51a. The bearing seat 10 can provide a certain degree of sealing for the bearing chamber 51a, effectively preventing dust and other impurities from entering the bearing chamber 51a, thereby improving the operational reliability of the bearing 30 and thereby extending the service life of the bearing 30.

[0049] The bearing 30 needs to be kept in a lubricated state during operation. Therefore, an oil storage chamber 100 a may be provided on the motor 100 to provide grease for the bearing 30 .

[0050] The position of the oil storage chamber 100a on the motor 100 is not limited. For example, please continue to refer to Figures 1 and 2. The bearing seat 10, the outer sealing ring 40, the rotating shaft 20 and the bearing 30 jointly define the oil storage chamber 100a, thereby facilitating lubrication of one axial end of the bearing 30.

[0051] In some embodiments, please continue to refer to FIG. 1 and FIG. 2 , the end cover 51 , the rotating shaft 20 , and the bearing 30 can also define an oil storage chamber 100 a , thereby facilitating lubrication of the other axial end of the bearing 30 .

[0052] The structure of the bearing seat 10 is not limited. For example, referring to FIG. 3 , the bearing seat 10 includes a seat body 11 and a sealing ring 12 .

[0053] The seat body 11 is provided with a mounting channel 11 a running through it in the axial direction. It is understandable that the outer axial wall of the bearing 30 abuts against the side wall of the mounting channel 11 a, thereby achieving the fixation and support of the bearing 30 .

[0054] The material of the base body 11 is not limited, and can be made of, for example, high-strength materials such as alloy steel, so as to ensure the structural strength of the base body 11 .

[0055] Referring to Figures 1 to 3 , at least a portion of the sealing ring 12 is disposed within the mounting channel 11a. The mounting channel 11a and the inner sidewall of the sealing ring 12 together define a connecting through-hole 10a. In other words, the sealing ring 12 can be completely or partially disposed within the mounting channel 11a. The outer sidewall of the sealing ring 12 can abut against the sidewall of the mounting channel 11a, effectively preventing grease from leaking out of the oil reservoir 100a.

[0056] For example, the cross-section of the sealing ring 12 along the axial direction of the rotating shaft 20 at one end close to the bearing 30 is L-shaped. The sealing ring 12 with this structure is equivalent to forming a bending area at one end close to the oil storage chamber 100a, so that the sealing effect of the oil storage chamber 100a can be further enhanced.

[0057] Furthermore, the "L"-shaped portion of the sealing ring 12, the seat body 11, the bearing 30 and the outer sealing ring 40 form an oil storage chamber 100a. Along the radial outward direction of the rotating shaft 20, the gap between the sealing ring 12 and the bearing 30 can gradually increase, so that the grease can gradually release pressure through this gap.

[0058] At least one of the sealing ring 12 and the seat body 11 is formed with a first hollow area 10 b.

[0059] It should be noted that the first hollowed-out area 10b refers to a hollow area. In other words, the bearing seat 10 includes a hollow area other than the connecting through hole 10a. This makes the bearing seat 10 lighter, thereby reducing the overall weight of the motor 100 and the production cost of the motor 100.

[0060] The type of the first hollowed-out area 10b is not limited, and may be, for example, at least one of a blind hole and a hollow portion.

[0061] On the other hand, an embodiment of the present application provides a bearing seat 10 as described in the above embodiment.

[0062] In the related art, the bearing seat is an integrated structure. In order to meet the bearing capacity of the bearing seat, it needs to be manufactured with a higher-strength material, and the overall weight is relatively large. At the same time, the integrated bearing seat is limited by processing capabilities and costs, making it difficult to reduce the weight of the bearing seat.

[0063] As for the bearing seat of the embodiment of the present application, on the one hand, the bearing seat 10 is divided into at least two parts, namely a seat body 11 and a sealing ring 12, by utilizing the fact that different parts of the bearing seat 10 perform different functions. Compared with the integrated bearing seat 10, the seat body 11 and the sealing ring 12 respectively assume part of the functions of the bearing seat 10. Therefore, the seat body 11 and the sealing ring 12 can be selected for materials based on the functions they need to assume. In this way, the overall design redundancy and material waste of the bearing seat 10 are reduced, and the overall weight of the bearing seat 10 can be reduced. On the other hand, the seat body 11 and the sealing ring 12 are only part of the bearing seat 10. Compared with the bearing seat 10 as a whole, the structural dimensions of the seat body 11 and the sealing ring 12 are smaller, which facilitates processing to form the first hollow area 10b. At the same time, the first hollow area 10b can further reduce the overall weight of the bearing seat 10 on the basis of ensuring the overall structural strength of the bearing seat 10.

[0064] In one embodiment, referring to FIG. 1 to FIG. 3 , a first hollow area 10 b is formed on the base body 11 . The first hollow area 10 b on the base body 11 includes at least one of a blind hole and a hollow portion.

[0065] It is understandable that at least one end of the blind hole and the hollow portion will be in a closed state, which will not affect the overall sealing effect of the bearing seat 10. At the same time, the weight of the seat body 11 is reduced, which is conducive to the lightweighting of the bearing seat 10.

[0066] It should be noted that the number of blind holes and hollow parts is not limited and can be opened according to actual needs.

[0067] Reinforcing ribs may be provided inside the first hollowed-out area 10 b of the base body 11 . Thus, after the first hollowed-out area 10 b is formed on the base body 11 , the overall structural strength of the base body 11 can be ensured.

[0068] The forming method of the seat body 11 is not limited. For example, it can be formed by forging or additive manufacturing.

[0069] Additive manufacturing can shorten processing cycles, improve production efficiency, and save materials.

[0070] In one embodiment, referring again to Figures 1 and 3 , a first hollowed-out region 10b is formed on the sealing ring 12. At least a portion of the inner wall of the sealing ring 12 is recessed to form the first hollowed-out region 10b. In other words, the first hollowed-out regions 10b may extend circumferentially along the inner wall of the sealing ring 12, or may be spaced apart along the circumference of the inner wall of the sealing ring 12.

[0071] In some embodiments, the first hollowed-out area 10 b may be an annular groove formed in the sealing ring 12 , and the annular groove is more convenient to process and easier to implement.

[0072] In other embodiments, the first hollowed-out area 10 b may be a tooth groove formed in the sealing ring 12 . In this structural state, the cross-sectional structure of the sealing ring 12 along the axial direction perpendicular to the shaft 20 is similar to that of the inner gear ring.

[0073] The number of first hollowed-out regions 10b on the sealing ring 12 is not limited. For example, referring to Figures 1 and 2 , the first hollowed-out region 10b is shaped like an annular groove. Multiple annular grooves are provided, spaced apart along the axial direction of the sealing ring 12. Multiple annular grooves can further reduce the weight of the sealing ring 12. The walls between adjacent annular grooves can provide support for the entire sealing ring 12, providing the sealing ring 12 with a certain degree of structural strength and preventing failure.

[0074] It should be noted that, in the embodiments of the present application, "a plurality" refers to two or more.

[0075] The thickness of the wall between two adjacent annular grooves is not limited. In some embodiments, the thickness of the wall between two adjacent annular grooves can be set to be equal.

[0076] The material of the sealing ring 12 is not limited, and it can be made of a composite material such as polyetheretherketone resin. Polyetheretherketone resin (PEEK) is a semi-crystalline, high-performance thermoplastic engineering plastic with good heat resistance. It can maintain stable physical properties in a working environment where the motor 100 is heated due to long-term operation. It has a small linear expansion coefficient and is easy to be injection molded and extruded. It has good processing performance and high molding efficiency. At the same time, the sealing ring 12 made of polyetheretherketone resin can facilitate the opening of the first hollowed-out area 10b, so that the wall thickness of each area of ​​the sealing ring 12 and the diameter of the first hole area can be greatly reduced, thereby compressing the size of the sealing ring 12, reducing the space occupied by the sealing ring 12, and reducing the weight of the sealing ring 12, thereby reducing the overall weight of the bearing seat 10.

[0077] The sealing ring 12 may be formed in any manner, for example, by additive manufacturing, die casting, or machining.

[0078] Reinforcement ribs can be provided on the sealing ring 12 to further enhance structural strength. For example, referring to Figures 1 and 2 , the sealing ring 12 comprises a first section and a second section that are axially connected to the rotating shaft 20 . The outer wall of the first section abuts the side wall of the mounting channel 11 a , while the diameter of the second section is smaller than that of the first section. The reinforcement ribs overlap the side walls of the first and second sections.

[0079] The connection method between the sealing ring 12 and the base body 11 is not limited, and the connection can be achieved by, for example, snap fastening, bonding, or die-casting.

[0080] In some embodiments, referring to Figures 1 to 3 , a groove 11c is formed between the sidewall of mounting channel 11a and one of sealing rings 12, and a protrusion 12a is formed on the other side. Protrusion 12a cooperates with groove 11c to position sealing ring 12 relative to base 11. The simple structure of protrusion 12a and groove 11c facilitates positioning of sealing ring 12 relative to base 11. Once positioned, this reduces the chance of sealing ring 12 falling off and improves the reliability of motor 100.

[0081] Specifically, referring to Figure 3, a protrusion 12a is circumferentially provided at one end of the sealing ring 12 close to the bearing 30, and the side wall of the mounting channel 11a is radially recessed to form a groove 11c. During the assembly process, the sealing ring 12 can enter the mounting channel 11a by extrusion or the like, and snap the protrusion 12a into the groove 11c to achieve positioning.

[0082] The structural form of the protrusion 12a is not limited, and the structure of the slot 11c matches the structure of the protrusion 12a.

[0083] In some embodiments, a plurality of protrusions 12a may be arranged at intervals along the circumference of the sealing ring 12, and a plurality of grooves 11c may be arranged along the circumference on the side wall of the mounting channel 11a. The protrusions 12a correspond one-to-one with the grooves 11c, thereby achieving axial positioning of the sealing ring 12 and the seat body 11 while preventing the sealing ring 12 from rotating relative to the seat body 11.

[0084] In other embodiments, the sealing ring 12 may also be provided with a protrusion 12a extending circumferentially, and the protrusion 12a may be connected end to end along the circumferential direction. In this way, after the protrusion 12a is matched with the groove 11c, the sealing ring 12 can be subjected to force in the circumferential direction, thereby increasing the matching area of ​​the protrusion 12a and the groove 11c, and making the connection strength between the sealing ring 12 and the seat body 11 higher.

[0085] In one embodiment, referring to Figures 2 and 3 , at least a portion of the sidewall of the mounting channel 11a protrudes to form a flange 11b, with one axial end of the sealing ring 12 abutting against the flange 11b. It will be appreciated that the flange 11b can be interposed between the bearing 30 and the sealing ring 12. On the one hand, the flange 11b, together with other components such as the end cap 51, can axially position the bearing 30 on the rotating shaft 20. On the other hand, the flange 11b creates a curved area on the sidewall of the mounting channel 11a, thereby reducing the possibility of grease leaking from the oil reservoir 100a.

[0086] It can be understood, please continue to refer to Figures 2 and 3, that when a groove 11c is also formed in the installation channel 11a, the groove 11c can be formed by the end surface of one axial end of the flange 11b extending radially outward along the installation channel 11a. In this way, the groove 11c and the flange 11b are processed and formed at the same time, thereby improving the processing efficiency of the seat body 11.

[0087] In one embodiment, referring to FIG. 1 and FIG. 2 , the bearing seat 10 includes a sealing gasket 13 . The sealing gasket 13 is sandwiched between the sealing ring 12 and the flange 11 b .

[0088] It is understandable that there may be some machining errors when processing the groove 11c and the protrusion 12a. That is, after the protrusion 12a and the groove 11c are matched, there may be a certain installation gap, which may cause the sealing ring 12 to move in the axial direction. The sealing gasket 13 can fill the installation gap, thereby achieving axial positioning of the sealing ring 12 and improving the sealing effect of the sealing ring 12.

[0089] It should be noted that the bearing seat 10 can reduce the overall weight of the motor 100 to a certain extent, and the overall weight of the motor 100 can be further reduced by structurally modifying components such as the outer sealing ring 40 and the end cover 51.

[0090] For example, referring to Figures 1, 2, and 4, a second hollowed-out area 40a is formed on the outer sealing ring 40. The second hollowed-out area 40a can be at least one of a blind hole, a hollow portion, etc. This reduces the weight of the outer sealing ring 40, thereby reducing the overall weight of the motor 100.

[0091] It is understandable that reinforcing ribs may be provided inside the second hollowed-out area 40 a to ensure the overall structural strength of the outer sealing ring 40 .

[0092] It should be noted that the structure of the outer sealing ring 40 is not limited. For example, referring to FIG4 , the outer sealing ring 40 includes a main body 41 and a sealing portion 42 , and at least one of the main body 41 and the sealing portion 42 is formed with a second hollowed area 40 a.

[0093] The main body 41 is sleeved on the rotating shaft 20 for axial positioning of the rotating shaft 20 .

[0094] The main body 41 is made of a material with high structural strength, such as alloy steel, so that the bearing capacity of the outer sealing ring 40 can be guaranteed.

[0095] The sealing portion 42 is sleeved on the main body 41 and is used to seal the oil storage chamber 100 a.

[0096] It can be understood that, according to the different functions implemented by various parts of the outer sealing ring 40, the outer sealing ring 40 is divided into the main body 41 and the sealing part 42. On the one hand, the materials of the main body 41 and the sealing part 42 can be selected based on the functions they need to perform. In this way, the design redundancy and material waste of the entire outer sealing ring 40 are reduced, and the overall weight of the outer sealing ring 40 can be reduced. On the other hand, the main body 41 and the sealing part 42 are only part of the outer sealing ring 40. Compared with the outer sealing ring 40 as a whole, the structural dimensions of the main body 41 and the sealing part 42 are smaller, thereby facilitating the processing to form the second hollowed-out area 40a. At the same time, the second hollowed-out area 40a can further reduce the overall weight of the outer sealing ring 40 while ensuring the overall structural strength of the outer sealing ring 40.

[0097] The connection method between the sealing part 42 and the main body 41 is not limited. For example, please refer to Figures 1 and 2. One of the main body 41 and the sealing part 42 is provided with a limiting rib along the circumferential direction, and the other is provided with a limiting groove. The limiting rib cooperates with the limiting groove to achieve axial positioning of the sealing part 42 and the main body 41.

[0098] The material of the sealing portion 42 is not limited, and can be made of a composite material such as polyetheretherketone resin, for example. This facilitates the creation of the second hollowed-out area 40 a.

[0099] In one embodiment, referring to Figures 1, 2, and 4, a second hollowed-out area 40a is formed on the sealing portion 42. This second hollowed-out area 40a of the sealing portion 42 is an annular groove 42a. The opening of the annular groove 42a faces the side of the sealing portion 42 facing away from the bearing 30. In other words, the side of the sealing portion 42 facing the bearing 30 does not have an opening, thereby preventing grease from escaping the oil reservoir 100a. Furthermore, the annular groove 42a is easy to create, facilitating the processing and molding of the sealing portion 42.

[0100] In one embodiment, referring to Figures 1 and 2 , the end of the sealing portion 42 proximate the bearing 30 extends radially inward to form a connecting segment 42b, which is interposed between the main body 41 and the bearing 30. In other words, the sidewall of the sealing portion 42, the bearing 30, and the bearing seat 10 collectively define an oil reservoir 100a. The sealing portion 42 effectively seals the oil reservoir 100a, reducing the possibility of grease leakage.

[0101] In one embodiment, the sealing portion 42 is an insulating member. It is understood that the connecting section 42b of the sealing portion 42 is sandwiched between the bearing 30 and the main body 41. Using the sealing portion 42 as an insulating member effectively prevents shaft current from being directed into the bearing 30 via the outer sealing ring 40, thereby reducing the impact of the shaft current on the bearing 30 and increasing the service life of the bearing 30.

[0102] It should be noted that the material of the insulating member is not limited, and may be, for example, a resin material such as polyetheretherketone resin.

[0103] The sealing portion 42 made of insulating parts can achieve the insulation function. No other insulating components need to be installed between the outer sealing ring 40 and the bearing 30 to block the shaft current, which reduces the number of axial parts of the motor 100, thereby making the motor 100 more compact.

[0104] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 4 , a plurality of stepped surfaces 42 c are formed on the outer wall of the sealing portion 42 . The stepped surfaces 42 c extend along the circumference of the sealing portion 42 and are clearance-matched with the sealing ring 12 .

[0105] It is understandable that the sealing portion 42 can rotate synchronously with the main body 41 , and the sealing portion 42 and the sealing ring 12 are loosely matched, so that the rotation of the sealing portion 42 is not disturbed.

[0106] The multiple step surfaces 42 c can form multiple bending areas in the clearance fitting channel between the sealing ring 12 and the sealing portion 42 , thereby preventing the grease in the oil storage chamber 100 a from leaking out.

[0107] The step surface 42 c extends along the circumferential direction of the sealing portion 42 . The sealing portion 42 and the sealing ring 12 can reduce the risk of grease leakage through the multiple step surfaces 42 c in the circumferential direction.

[0108] The diameter change between two adjacent step surfaces 42c is not limited. For example, it can be gradually increased or decreased along the axial side of the sealing portion 42, or it can be irregular.

[0109] For example, please refer to Figures 2 and 4. The diameter of the step surface 42c of the sealing portion 42 increases successively in the direction away from the bearing 30. When a first hollow area 10b in the shape of an annular groove is provided on the sealing ring 12, the annular groove is connected to the clearance fitting channel of the sealing portion 42 and the sealing ring 12. After the grease leaves the oil storage chamber 100a from the clearance fitting channel, it can enter the annular groove. The axial wall of the annular groove can prevent the grease from continuing to flow out. The annular groove cooperates with the step surface 42c to further reduce the risk of grease leakage.

[0110] In one embodiment, referring to FIG. 1 and FIG. 2 , the end cover 51 can protect the rotor assembly 60 and the stator assembly 52 , and at the same time, support the rotating shaft 20 .

[0111] Referring to Figure 2 , multiple enclosed weight-reducing cavities are provided in the end cap 51. The provision of these weight-reducing cavities reduces the weight of the end cap 51 while ensuring that the structural strength of the end cap 51 is sufficient to support the weight of the rotating shaft 20 and the components mounted thereon, thereby contributing to the lightweighting of the motor 100.

[0112] It can be understood that the structure between the weight-reducing chambers forms a force transmission path that supports the weight of the rotating shaft 20 .

[0113] The closed weight-reducing cavity refers to a cavity that is not connected to the outside world to prevent foreign matter from entering the cavity.

[0114] The specific manufacturing method for forming the weight-reducing cavity is not limited. For example, the end cover 51 is manufactured by additive manufacturing.

[0115] The specific shape of the weight reduction cavity is not limited.

[0116] For example, in the axial projection along the rotating shaft 20 , the projection of the weight-reducing cavity is a hexagon, so that a honeycomb structure is formed between the weight-reducing cavities, which improves space utilization on the one hand and improves the structural strength of the end cover 51 on the other hand.

[0117] In one embodiment, referring to FIG. 1 , the motor 100 includes a sealing assembly 70 , which is disposed between the end cover 51 and the rotor assembly 60 . The sealing assembly 70 , the end cover 51 , the rotating shaft 20 , and the bearing 30 together define an oil storage chamber 100 a . The sealing assembly 70 is used to seal the oil storage chamber 100 a .

[0118] A portion of the sealing assembly 70 is connected to the end cover 51, and another portion is connected to the rotor assembly 60. In other words, one portion of the sealing assembly 70 can rotate relative to the other portion without interfering with each other.

[0119] The material of the sealing component 70 is not limited, and can be made of composite materials such as polyetheretherketone resin.

[0120] The sealing assembly 70 is annular and surrounds the rotating shaft 20 along the circumference of the rotating shaft 20 , so that any position of the circumference of the oil storage chamber 100 a can be sealed by the sealing assembly 70 .

[0121] The specific structure of the sealing assembly 70 is not limited.

[0122] Exemplarily, referring to FIG. 2 , FIG. 5 and FIG. 6 , the sealing assembly 70 includes two sealing members 71 , one sealing member 71 is connected to the rotor assembly 60 , and the other sealing member 71 is connected to the end cover 51 .

[0123] The manner of connecting the seal 71 to the rotor assembly 60 or the end cover 51 is not limited.

[0124] Exemplarily, an elastic clip is provided on the circumferential side of the seal 71, and a positioning groove is provided on the rotor assembly 60 and / or the end cover 51. The elastic clip and the positioning groove both extend in the radial direction of the rotating shaft 20. The elastic clip can be embedded in the positioning groove along the rotating shaft 20, thereby realizing the connection between the seal 71 and the rotor assembly 60 and / or the end cover 51.

[0125] The elastic clip can undergo elastic deformation along the radial direction of the rotating shaft 20. During the installation process, the seal 71 can move along the axial direction of the rotating shaft 20, so that the elastic clip can be located on the inner side of the positioning groove along the radial direction of the rotating shaft 20. At this time, the force acting on the elastic clip is removed, and the elastic clip restores its elastic deformation, so that the elastic clip can be clamped into the positioning groove along the radial direction of the rotating shaft 20.

[0126] It can be understood that by applying external force to cause the elastic buckle to generate elastic deformation inward along the radial direction of the rotating shaft 20, a detachable connection of the sealing member 71 can be achieved, thereby improving the convenience of disassembly and assembly of the sealing member 71.

[0127] In some embodiments, as shown in Figures 1, 2, 5, and 6, a sealing member 71 has an annular groove-shaped opening formed on one side, allowing two sealing members 71 to fit together, such that at least one can be embedded in the other and spaced apart. In this way, the sealing members 71 can overlap, resulting in the sealing assembly 70 occupying less axial space on the motor 100, allowing the motor 100 to be designed more compactly. Furthermore, the overall size of the sealing assembly 70 can be reduced, thereby reducing its weight, thereby facilitating a lighter motor 100.

[0128] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0129] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A bearing seat, comprising: A seat body, wherein the seat body is provided with a mounting passage extending through the seat body in the axial direction; A sealing ring, at least a portion of which is disposed in the installation channel, the installation channel and the inner side wall of the sealing ring jointly define a connecting through hole, the connecting through hole is used for the shaft to pass through, and at least one of the sealing ring and the seat body is formed with a first hollowed-out area. 2 . The bearing seat according to claim 1 , wherein the first hollowed-out area is formed on the seat body, and the first hollowed-out area on the seat body includes a blind hole and / or a hollow portion. 3 . The bearing seat according to claim 1 , wherein the first hollow area is formed on the sealing ring, and at least a portion of the inner wall of the sealing ring is recessed to form the first hollow area.

4. The bearing seat according to claim 1, wherein at least a portion of the side wall of the mounting channel protrudes to form a flange, and one axial end of the sealing ring abuts against the flange.

5. The bearing seat according to claim 4, comprising a sealing gasket, wherein the sealing gasket is sandwiched between the sealing ring and the flange.

6. The bearing seat according to claim 1, wherein a groove is formed on the side wall of the mounting channel and one of the sealing rings, and a protrusion is formed on the other one, and the protrusion cooperates with the groove to position the sealing ring and the seat body.

7. A motor, comprising: The bearing seat according to any one of claims 1 to 6; A rotating shaft, wherein the rotating shaft is inserted into the connecting through hole; A bearing sleeved on the rotating shaft, wherein the outer wall of the bearing abuts against the side wall of the connecting through hole; An outer sealing ring is sleeved on the rotating shaft, and one end of the outer sealing ring along the axial direction abuts against the end surface of the bearing to position the bearing. 8 . The motor according to claim 7 , wherein a second hollowed-out area is formed on the outer sealing ring.

9. The motor according to claim 8, wherein the outer sealing ring comprises a main body and a sealing portion, wherein the main body is sleeved on the rotating shaft, and the sealing portion is sleeved on the main body, and at least one of the main body and the sealing portion is formed with the second hollowed-out area. 10 . The motor according to claim 9 , wherein the second hollowed-out area is formed on the sealing portion, the second hollowed-out area of ​​the sealing portion is an annular groove, and an opening of the annular groove faces a side of the sealing portion away from the bearing. 11 . The motor according to claim 9 , wherein one end of the sealing portion close to the bearing extends radially inward to form a connecting section, and the connecting section is sandwiched between the main body and the bearing. The motor according to claim 11 , wherein the sealing portion is an insulating member. 13 . The motor according to claim 9 , wherein a plurality of step surfaces are formed on an outer side wall of the sealing portion, the step surfaces extend along a circumferential direction of the sealing portion, and the step surfaces are gap-matched with the sealing ring.

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