Integrated bearing unit of motor

Abstract

The invention discloses a motor integrated bearing unit, and relates to the technical field of motor bearings, and the motor integrated bearing unit comprises a bearing inner ring which sleeves the circumferential outer side of a motor rotating shaft; the bearing outer ring is arranged on the circumferential outer side of the bearing inner ring, a bearing flange is integrated on the bearing outer ring, and the bearing flange is connected to the motor end cover through a bolt; the inner side part of the grease storage cover plate is connected with the bearing inner ring, the outer side part of the grease storage cover plate is connected with the bearing outer ring, and a grease storage chamber is formed among the bearing inner ring, the bearing outer ring and the grease storage cover plate. The integrated bearing unit solves the technical problems that an existing motor open type bearing is provided with a large number of parts, installation and disassembly are complex, the occupied axial space size of the motor is large, and the weight of the motor is heavy. The bearing inner ring, the bearing outer ring, the grease storage cover plate and the bearing flange are integrated, so that the bearing is simple and compact in overall structure and simple and convenient to mount, dismount and maintain, the axial space of the motor is effectively saved, the space size and weight of the motor are reduced, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor bearings, and in particular to a motor integrated bearing unit. Background Art

[0002] Bearings are important parts of motors. They are mainly used to support the motor rotor to ensure its normal and stable high-speed rotation. The operating condition of the bearing directly affects the normal operation of the motor. However, as motors develop towards high power density, long life, and maintenance-free, open bearing configurations can no longer meet development needs and have become a key factor restricting their development.

[0003] At present, the motor bearing configurations disclosed in the prior art are all open bearing configurations, which are generally composed of components such as a bearing seat, a sealing gasket, an inner grease storage chamber, an outer grease storage chamber, an inner oil seal and an outer oil seal. There are many components involved, which are complicated to install and disassemble, and the motor axial space occupied is large, resulting in large motor space size and weight, and high production costs. On the other hand, the existing motor bearings are single components, that is, the transmission end and non-transmission end bearing units of the motor are open bearing configurations, and grease needs to be regularly added to the bearings through the grease replenishing channel to achieve good lubrication of the bearings, and the bearings cannot be maintenance-free for life. Therefore, a motor integrated bearing unit is proposed to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide a motor integrated bearing unit, which solves the technical problems that the existing motor has many parts, is complicated to install and disassemble, occupies a large axial space of the motor, resulting in large motor space size and weight, and high production cost.

[0005] To achieve the above object, the present invention provides a motor integrated bearing unit, comprising:

[0006] Motor shaft;

[0007] A bearing inner ring is sleeved and arranged on the circumferential outer side of the motor shaft, and the bearing inner ring and the motor shaft are interference fit;

[0008] A bearing outer ring is arranged on the circumferential outer side of the bearing inner ring, a rolling track is arranged at the connection position between the bearing outer ring and the bearing inner ring, an insulating rolling body is arranged in the rolling track, a bearing flange is integrally arranged on the circumferential outer side of the bearing outer ring, and the bearing flange is connected to the motor end cover through a plurality of first bolts;

[0009] A grease storage cover plate, wherein the inner side of the grease storage cover plate is connected to the inner ring of the bearing, the inner ring of the bearing can rotate relative to the grease storage cover plate, the outer side of the grease storage cover plate is connected to the outer ring of the bearing, a grease storage chamber is formed between the inner ring of the bearing, the outer ring of the bearing and the grease storage cover plate, the grease storage chamber is filled with grease, and the grease storage chamber is connected to the rolling track.

[0010] Preferably, a plurality of flange holes are arranged in an array on the end face of the outer ring of the bearing, a plurality of through holes are arranged in an array on the outer side of the grease storage cover plate, and a second bolt passes through the through holes to connect the flange holes to connect the grease storage cover plate to the end face of the outer ring of the bearing.

[0011] Preferably, a first annular stepped groove is provided on the inner circumferential side of the bearing outer ring, and an annular connecting portion is provided on the outer side of the grease storage cover plate facing the side of the bearing inner ring, and the outer circumferential side of the annular connecting portion is interference fit with the inner circumferential side of the first annular stepped groove.

[0012] Preferably, an annular protrusion is integrally provided on the end face of the bearing outer ring, an annular connecting portion is provided on the outer side of the grease storage cover plate facing the bearing inner ring, and the inner peripheral side surface of the annular connecting portion is interference fit with the outer peripheral side surface of the annular protrusion.

[0013] Preferably, a plurality of labyrinth grooves are arranged on both end surfaces of the inner ring of the bearing, and a clamping portion is arranged on the inner side of the grease storage cover plate facing the inner ring of the bearing, and the clamping portion is rotatably connected to the labyrinth grooves.

[0014] Preferably, a sealing lip is integrated into the inner side of the grease storage cover plate, a second annular step groove is arranged on the outer peripheral side of the bearing inner ring, the outer side surface of the sealing lip abuts against the second annular step groove to form a light contact lip seal, and the sealing lip is rotatably connected to the second annular step groove.

[0015] Preferably, a first assembly groove is provided on the inner peripheral side of the bearing outer ring, and a second assembly groove is provided on the outer peripheral side of the bearing inner ring, and the first assembly groove and the second assembly groove are combined to form the rolling track.

[0016] Preferably, the insulating rolling element is in any one of a spherical, cylindrical or conical shape as a whole.

[0017] Preferably, a retaining frame is arranged in the rolling track, and the insulating rolling element array is arranged on the retaining frame.

[0018] Preferably, a shaft shoulder and a plurality of positioning nuts are provided on the outer peripheral side surface of the motor shaft, and the shaft shoulder and the plurality of positioning nuts respectively support the two end surfaces of the bearing inner ring to axially position the bearing inner ring.

[0019] Compared with the above background technology, the motor integrated bearing unit provided by the present invention has the following beneficial effects: by integrating the inner ring of the bearing, the outer ring of the bearing, the insulating rolling element, the cage, the grease storage cover plate, the bearing flange and the grease into one, the overall structure of the bearing is simple and compact, and the bearing can be directly assembled on the motor end cover, effectively saving the axial space of the motor, reducing the spatial size and weight of the motor, thereby reducing the production cost of the motor, and the installation and disassembly of the bearing is more convenient, and the bearing maintenance and replacement can be realized without disassembling the motor. On the other hand, a grease storage cover plate is arranged at both ends of the bearing, and a grease storage chamber is formed by the inner ring of the bearing, the outer ring of the bearing and the grease storage cover plate. The grease filled in the grease storage chamber can be provided to the connection position of the inner ring of the bearing and the outer ring of the bearing in real time to achieve good lubrication of the bearing, and there is no need to regularly add grease to the bearing. In addition, the insulating rolling element has good anti-electrical corrosion ability, which can effectively prevent the bearing from being corroded during operation, further extending the service life of the bearing, and realizing lifelong maintenance-free bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A three-dimensional structural diagram of a motor integrated bearing unit provided in a preferred embodiment of the present invention;

[0022] Figure 2 A side view of a motor integrated bearing unit provided by a preferred embodiment of the present invention;

[0023] Figure 3 A partial cross-sectional schematic diagram of a motor integrated bearing unit provided in a preferred embodiment of the present invention;

[0024] Figure 4 A partial cross-sectional schematic diagram of a motor integrated bearing unit provided in a second embodiment of the present invention;

[0025] Figure 5 A partial cross-sectional schematic diagram of a motor integrated bearing unit provided in a third embodiment of the present invention;

[0026] Figure 6 A partial cross-sectional schematic diagram of a motor integrated bearing unit provided in a fourth embodiment of the present invention;

[0027] Figure 7 A partial cross-sectional schematic diagram of a motor integrated bearing unit provided in a fifth embodiment of the present invention;

[0028] Figure 8 A partial cross-sectional schematic diagram of a motor-integrated bearing unit provided in accordance with a sixth embodiment of the present invention.

[0029] Specifically, 1-motor shaft; 2-bearing inner ring; 3-bearing outer ring; 4-insulating rolling element; 5-grease storage cover plate; 6-grease storage chamber; 7-retaining frame; 8-first annular step groove; 9-annular connecting part; 10-annular protrusion; 11-labyrinth groove; 12-clamping part; 13-sealing lip; 14-second annular step groove; 15-bearing flange; 16-motor end cover; 17-positioning nut; 18-shaft shoulder. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1 and Figure 2 As shown, in order to achieve the above-mentioned purpose, the present invention provides a motor integrated bearing unit, including: a bearing inner ring 2, a bearing outer ring 3 and a grease storage cover plate 5, an insulating rolling element 4, a retaining frame 7 and grease.

[0033] Among them, the bearing inner ring 2 is sleeved on the circumferential outer side of the motor shaft 1, the bearing inner ring 2 and the motor shaft 1 rotate synchronously, and the bearing inner ring 2 and the motor shaft 1 have an interference fit to ensure that there is no mutual friction between the motor shaft 1 and the bearing inner ring 2, thereby protecting the motor shaft 1.

[0034] The outer ring 3 of the bearing is arranged on the circumferential outer side of the inner ring 2 of the bearing. The outer ring 3 of the bearing can rotate freely relative to the inner ring 2 of the bearing. A rolling track is arranged at the connection position between the outer ring 3 of the bearing and the inner ring 2 of the bearing. An insulating rolling body is arranged in the rolling track. Both end faces of the inner ring 2 of the bearing and both end faces of the outer ring 3 of the bearing are connected to the grease storage cover plate 5. Specifically, the outer side of the grease storage cover plate 5 is connected to the outer ring 3 of the bearing. A grease storage chamber 6 is formed between the inner ring 2 of the bearing, the outer ring 3 of the bearing and the grease storage cover plate 5. The grease is filled in the grease storage chamber 6, and the grease storage chamber 6 is connected to the rolling track. The grease filled in the grease storage chamber 6 is provided to the connection position between the inner ring 2 of the bearing and the outer ring 3 of the bearing in real time to achieve good lubrication of the bearing, and there is no need to regularly add grease to the bearing. At the same time, the insulating rolling body 4 has good anti-electrical corrosion ability, which can effectively prevent the bearing from being corroded during operation, further extend the service life of the bearing, and achieve lifelong maintenance-free bearing.

[0035] Among them, a bearing flange 15 is integrally arranged on the circumferential outer side of the bearing outer ring 3, and a plurality of bolt holes are arranged in an array on the side of the bearing flange 15. The bolt holes are threadedly connected to the first bolts, and the bearing outer ring 3 is assembled on the motor end cover 16 by the first bolts, and the bearing outer ring 3 is fixed and stationary relative to the motor end cover 16. At the same time, the bearing inner ring 2 and the bearing outer ring 3 are both connected to the grease storage cover plate 5, and the bearing inner ring 2 is rotatably connected to the grease storage cover plate 5. By integrating the bearing inner ring 2, the bearing outer ring 3, the insulating rolling element 4, the retaining frame 7, the grease storage cover plate 5 and the bearing flange 15 into one, the bearing can be directly assembled on the motor end cover. Compared with the existing motor bearing, the bearing seat, the sealing gasket, the inner oil seal, the outer oil seal and other parts are omitted, so that the overall structure of the bearing is simple and compact, effectively saving the axial space of the motor, reducing the space size and weight of the motor, thereby reducing the production cost of the motor, and the installation and disassembly of the bearing is more convenient, which can realize the maintenance and replacement of the bearing without disassembly of the motor.

[0036] Preferably, the grease storage cover plate 5 is in a C shape as a whole, and the opening of the grease storage cover plate 5 faces the bearing inner ring 2, so as to maximize the volume of the grease storage chamber 6 formed by the grease storage cover plate 5, the bearing inner ring 2 and the bearing outer ring 3, thereby storing more grease and further improving the service life of the bearing. On the other hand, the side of the grease storage cover plate 5 away from the bearing inner ring 2 is concave in the end face of the bearing inner ring 2, so as to ensure that the setting of the grease storage cover plate 5 does not increase the axial length of the entire bearing, further making the overall structure of the bearing simple and compact, and saving the axial space of the motor.

[0037] like Figure 3 and Figure 4As shown, in one embodiment of the present invention, a plurality of flange holes are arranged in an array on the end surface of the bearing outer ring 3, and a plurality of through holes are arranged in an array on the outer side of the grease storage cover plate 5, and each second bolt passes through the through hole to connect the flange hole, so as to connect the grease storage cover plate 5 to the end surface of the bearing outer ring 3. In addition, a plurality of labyrinth grooves 11 are arranged on both end surfaces of the bearing inner ring 2, and preferably, a labyrinth groove 11 is arranged on both end surfaces of the bearing inner ring 2, and a clamping portion 12 is arranged on the inner side of the grease storage cover plate 5 facing the bearing inner ring 2, and the clamping portion 12 is rotatably connected to the labyrinth groove 11, and the grease storage cover plate 5 is sealed and connected to the bearing inner ring 2 through the cooperation of the clamping portion 12 and the labyrinth groove 11, wherein the bearing inner ring 2 is rotatable relative to the grease storage cover plate 5, and the grease storage cover plate 5 is sealed and connected to the bearing outer ring 3 to form a grease storage chamber 6, and the grease is effectively sealed in the grease storage chamber 6. It should be noted that the inner side of the grease storage cover plate 5 is located at the outer peripheral part of the grease storage cover plate 5 close to the axial position of the grease storage cover plate 5, and the inner side of the grease storage cover plate 5 is located at the inner peripheral part of the grease storage cover plate 5 away from the axial position of the grease storage cover plate 5. By setting a groove on the inner ring of the bearing itself, a labyrinth seal is formed with the grease storage cover plate, and no additional components are required to form a seal, which can also further make the overall structure of the bearing simple and compact, saving the axial space of the motor.

[0038] Of course, two or more labyrinth grooves 11 may also be provided on both end surfaces of the bearing inner ring 2, such as Figure 8 As shown, a clamping portion 12 corresponding to the number of the labyrinth grooves 11 is provided on the inner side of the grease storage cover plate 5 facing the bearing inner ring 2, and each clamping portion 12 is rotatably connected to a labyrinth groove 11. The corresponding labyrinth grooves 11 are sealed and connected by multiple clamping portions 12, thereby further enhancing the sealing strength between the grease storage cover plate 5 and the bearing inner ring 2. At the same time, the grease storage cover plate 5 is sealed and connected to the bearing outer ring 3 to form a grease storage chamber 6, and the grease is sealed in the grease storage chamber 6.

[0039] It should be noted that the bearing inner ring 2 and the grease storage cover plate 5 are assembled to form a non-contact gap labyrinth seal by cooperating with the clamping part 12 and the labyrinth groove 11. On the one hand, it can prevent grease leakage and contaminants from entering the interior of the bearing, and on the other hand, it can reduce the friction and heat of the bearing and improve the high-speed operation performance of the bearing.

[0040] like Figure 5 As shown, in one embodiment of the present invention, a first annular stepped groove 8 is provided on the inner peripheral side surface of the bearing outer ring 3, and an annular connecting portion 9 is provided on the side of the outer side of the grease storage cover plate 5 facing the bearing inner ring 2. The outer peripheral side surface of the annular connecting portion 9 is interference fit with the inner peripheral side surface of the first annular stepped groove 8 to connect the grease storage cover plate 5 to the end surface of the bearing outer ring 3, and the grease storage cover plate 5 is sealed and connected to the bearing inner ring 2 to form a grease storage chamber 6, and the grease is sealed in the grease storage chamber 6, wherein the bearing inner ring 2 is rotatable relative to the grease storage cover plate 5.

[0041] like Figure 6 As shown, in one embodiment of the present invention, an annular protrusion 10 is integrally provided on the end face of the bearing outer ring 3, and an annular connecting portion 9 is provided on the side of the outer side of the grease storage cover plate 5 facing the bearing inner ring 2. The inner peripheral side surface of the annular connecting portion 9 is interference fit with the outer peripheral side surface of the annular protrusion 10 to connect the grease storage cover plate 5 to the end face of the bearing outer ring 3, and the grease storage cover plate 5 is sealed and connected to the bearing inner ring 2 to form a grease storage chamber 6, and the grease is sealed in the grease storage chamber 6, wherein the bearing inner ring 2 is rotatable relative to the grease storage cover plate 5.

[0042] like Figure 7 As shown, in one embodiment of the present invention, a sealing lip 13 is integrated on the inner side of the grease storage cover plate 5, and a second annular step groove 14 is arranged on the outer peripheral side of the bearing inner ring 2. The second annular step groove 14 replaces the labyrinth groove 11. The outer side surface of the sealing lip 13 abuts against the second annular step groove 14 to form a light contact lip seal, and the sealing lip 13 is rotatably connected to the second annular step groove 14. The sealing lip 13 cooperates with the bearing inner ring 2 to form a light contact lip seal, thereby making the sealing effect better, better preventing grease leakage and contaminants from entering the bearing, and improving the service life of the bearing.

[0043] A first assembly groove is set on the inner peripheral side of the bearing outer ring 3, and a second assembly groove is set on the outer peripheral side of the bearing inner ring 2. The first assembly groove and the second assembly groove are combined to form a rolling track. The rolling track is ring-shaped as a whole. The grease in the grease storage chamber 6 enters the rolling track to lubricate the insulating rolling element 4, thereby ensuring the use effect of the bearing. Preferably, the insulating rolling element 4 is made of ceramic material, making full use of the advantage of ceramic material having good resistance to electrical corrosion.

[0044] In addition, matching grooves are provided in both the first assembly groove and the second assembly groove, and the matching grooves are used to position and install the insulating rolling element 4 to ensure that the insulating rolling element 4 always runs stably in the rolling track. It should be noted that the insulating rolling element 4 is spherical, cylindrical or conical as a whole, and the matching groove is designed according to the shape of the insulating rolling element 4 to ensure stable matching between the matching groove and the insulating rolling element 4.

[0045] In one embodiment of the present invention, a retaining frame 7 is provided in the rolling track, and an array of insulating rolling bodies 4 is arranged on the retaining frame 7. The retaining frame 7 can be used to evacuate the rotating bodies, and the insulating rolling bodies 4 are spaced at equal distances and evenly distributed on the circumference of the rolling track to prevent collision and friction between two adjacent insulating rolling bodies 4 when the outer ring 3 of the bearing and the inner ring 2 of the bearing rotate relative to each other, guide the rotating bodies to rotate on the rolling track and work evenly, and at the same time limit and correct the position and posture of the insulating rolling bodies 4 in the rolling track to prevent the insulating rolling bodies 4 from falling off.

[0046] It should be noted that a shaft shoulder 18 and a plurality of positioning nuts 17 are provided on the outer peripheral side of the motor shaft 1, and the shaft shoulder 18 and the plurality of positioning nuts 17 respectively support the two end surfaces of the bearing inner ring 2. Specifically, Figure 3 and Figure 4 As shown, the shaft shoulder 18 supports the right end surface of the bearing inner ring 2, and the positioning nut 17 supports the left end surface of the bearing inner ring 2 to axially position the bearing inner ring 2 to prevent the bearing inner ring 2 from separating from the motor shaft 1 during operation, thereby effectively improving the stability of the bearing during operation.

[0047] During assembly, the bearing outer ring 3 is assembled on the motor end cover 16 through the first bolt connecting the bolt holes. The bearing outer ring 3 is fixed and stationary relative to the motor end cover 16, and the bearing inner ring 2 is sleeved and arranged on the circumferential outer side of the motor shaft 1. The bearing inner ring 2 and the motor shaft 1 are interference fit. The motor shaft 1 drives the bearing inner ring 2 to rotate synchronously, and the grease in the grease storage chamber 6 provides grease to the rolling track in real time.

[0048] In summary, by integrating the bearing inner ring 2, the bearing outer ring 3, the insulating rolling element 4, the retaining frame 7, the grease storage cover plate 5 and the bearing flange 15 into one, the bearing can be directly assembled on the motor end cover. Compared with the existing motor open bearing, the bearing seat, the sealing gasket, the inner oil seal, the outer oil seal and other parts are omitted, so that the overall structure of the bearing is simple and compact, which effectively saves the axial space of the motor, reduces the space and weight of the motor, and thus reduces the production cost of the motor.

[0049] 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.

[0050] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A motor integrated bearing unit, characterized in that: include: Motor shaft; A bearing inner ring is sleeved and arranged on the circumferential outer side of the motor shaft, and the bearing inner ring and the motor shaft are interference fit; A bearing outer ring is arranged on the circumferential outer side of the bearing inner ring, a rolling track is arranged at the connection position between the bearing outer ring and the bearing inner ring, an insulating rolling body is arranged in the rolling track, a bearing flange is integrally arranged on the circumferential outer side of the bearing outer ring, and the bearing flange is connected to the motor end cover through a plurality of first bolts; A grease storage cover plate, wherein the inner side of the grease storage cover plate is connected to the inner ring of the bearing, the inner ring of the bearing can rotate relative to the grease storage cover plate, the outer side of the grease storage cover plate is connected to the outer ring of the bearing, a grease storage chamber is formed between the inner ring of the bearing, the outer ring of the bearing and the grease storage cover plate, the grease storage chamber is filled with grease, and the grease storage chamber is connected to the rolling track.

2. The motor integrated bearing unit according to claim 1, characterized in that: The end face of the outer ring of the bearing is arrayed with a plurality of flange holes, the outer side of the grease storage cover plate is arrayed with a plurality of through holes, and the second bolt passes through the through holes to connect the flange holes to connect the grease storage cover plate to the end face of the outer ring of the bearing.

3. The motor integrated bearing unit according to claim 1, characterized in that: A first annular stepped groove is arranged on the inner circumferential side of the bearing outer ring, and an annular connecting portion is arranged on the outer side of the grease storage cover plate facing the side of the bearing inner ring, and the outer circumferential side of the annular connecting portion is interference fit with the inner circumferential side of the first annular stepped groove.

4. The motor integrated bearing unit according to claim 1, characterized in that: An annular protrusion is integrally provided on the end face of the bearing outer ring, an annular connecting portion is provided on the outer side of the grease storage cover plate facing the bearing inner ring, and the inner peripheral side surface of the annular connecting portion is interference fit with the outer peripheral side surface of the annular protrusion.

5. A motor integrated bearing unit according to any one of claims 1 to 4, characterized in that: A plurality of labyrinth grooves are arranged on both end surfaces of the inner ring of the bearing, and a clamping portion is arranged on the inner side of the grease storage cover plate facing the inner ring of the bearing, and the clamping portion is rotatably connected to the labyrinth grooves.

6. A motor integrated bearing unit according to any one of claims 1 to 4, characterized in that: The inner side of the grease storage cover plate is integrated with a sealing lip, and the outer peripheral side of the bearing inner ring is provided with a second annular step groove. The outer side surface of the sealing lip abuts against the second annular step groove to form a light contact lip seal, and the sealing lip is rotatably connected to the second annular step groove.

7. A motor integrated bearing unit according to any one of claims 1 to 4, characterized in that: A first assembly groove is arranged on the inner peripheral side of the bearing outer ring, and a second assembly groove is arranged on the outer peripheral side of the bearing inner ring. The first assembly groove and the second assembly groove are combined to form the rolling track.

8. The motor integrated bearing unit according to claim 7, characterized in that: The insulating rolling element is in any one of a spherical shape, a cylindrical shape or a conical shape as a whole.

9. The motor integrated bearing unit according to claim 8, characterized in that: A retaining frame is arranged in the rolling track, and the insulating rolling element array is arranged on the retaining frame.

10. A motor integrated bearing unit according to any one of claims 1 to 4, characterized in that: A shaft shoulder and a plurality of positioning nuts are arranged on the outer peripheral side surface of the motor shaft, and the shaft shoulder and the plurality of positioning nuts respectively support the two end surfaces of the inner ring of the bearing to axially position the inner ring of the bearing.

Images