Bearing limiting structure, motor, electric assembly and vehicle

Abstract

The utility model relates to a bearing limiting structure, a motor, an electric assembly and a vehicle, and the bearing limiting structure comprises a bearing seat which is provided with an end face, and the end face is provided with a bearing hole axially perpendicular to the end face; the at least two bearing pressing plates are fixed on the end surface of the bearing seat and are arranged along the circumferential direction of the bearing hole; each bearing pressing plate comprises a fixing part and an abutting part which are connected with each other, the fixing parts are fixed to the bearing seat, the abutting parts abut against the end faces, and at least part of the abutting parts are overlapped with the bearing holes in the axial direction of the bearing holes and used for limiting axial movement of the bearings in the bearing holes. The bearing is axially positioned by adopting a split structure, so that the assembly precision can be reduced, and the assembly difficulty can be reduced. In addition, the split type bearing pressing plate is simple in structure and low in material consumption, the cost can be reduced, the weight is reduced, and the lightweight design pursued by the current automobile industry is met.

Description

Technical Field

[0001] The present application relates to the technical field of automotive parts, and in particular to a bearing limiting structure, a motor, an electric assembly and a vehicle. Background Art

[0002] With the rapid development of the automotive industry, the demand for user-friendly, automated, and high-performance automotive parts and equipment is increasing. Currently, axial positioning of bearings is primarily achieved by using a ring-shaped pressure plate that presses against the outside of the bearing and secures it to the bearing seat with bolts. However, this structure requires high assembly precision, making installation difficult and costly. Utility Model Content

[0003] To address the above-mentioned issues, the present application provides a bearing limit structure. By optimizing the pressure plate in the limit structure in a targeted manner and utilizing a novel split limit structure to achieve axial positioning of the bearing, the bearing can be positioned with reduced assembly precision and difficulty, while also simplifying the structure, achieving a lightweight design, and reducing costs. Furthermore, the present application also provides a motor, electric assembly, and vehicle equipped with the bearing limit structure, specifically including the following solutions:

[0004] In a first aspect, the present application provides a bearing limiting structure, comprising:

[0005] The bearing seat has an end face, and a bearing hole is formed on the end face with an axial direction perpendicular to the end face;

[0006] At least two bearing pressure plates are fixed to the end surface of the bearing seat and arranged along the circumference of the bearing hole;

[0007] Each bearing pressure plate includes a fixing portion and a supporting portion that are connected to each other. The fixing portion is fixed to the bearing seat, and the supporting portion is supported on the end face. Along the axial direction of the bearing hole, the supporting portion at least partially overlaps with the bearing hole to limit the axial movement of the bearing in the bearing hole.

[0008] The bearing retaining structure of this application provides a bearing hole in the bearing seat for mounting the bearing, thereby achieving circumferential positioning of the bearing. A bearing pressure plate is fixedly disposed on the end surface of the bearing hole to achieve axial positioning of the bearing. At least two bearing pressure plates are provided, arranged circumferentially along the bearing hole, thereby improving the reliability of the bearing's axial positioning.

[0009] Specifically, by setting a fixing part and a supporting part in each bearing pressure plate, the fixing part is used to fix the bearing pressure plate and the bearing seat, and the supporting part is used to abut the end face and make it at least partially overlap with the bearing hole, thereby realizing axial positioning of the bearing.

[0010] It is understandable that the bearing limiting structure of the present application achieves axial positioning of the bearing by utilizing at least two bearing pressure plates in conjunction with each other. During assembly, assembly can be achieved by simply fixing the fixed portion of each bearing pressure plate to the bearing seat. In other words, the present application uses a split structure to axially position the bearing, which can reduce assembly accuracy and assembly difficulty. In addition, the split bearing pressure plate has a simple structure and consumes less material, which can reduce costs and weight, and is in line with the lightweight design pursued by the current automotive industry.

[0011] In one embodiment, the supporting portion is arc-shaped, the fixing portion is connected to the middle portion of the supporting portion, and the inner diameter of the supporting portion is smaller than the inner diameter of the bearing hole.

[0012] In this embodiment, by configuring the retaining portion in an arc shape to optimize the spatial layout of the limiting structure, interference between the retaining portion and surrounding components of the bearing seat can be avoided. A fixed portion is provided, connected to the middle portion of the retaining portion, so that each bearing pressure plate extends two clamp arms along the circumference of the bearing hole, starting from the fixed portion fixed to the bearing seat. These clamp arms support the bearing and prevent axial movement of the bearing. Furthermore, by limiting the inner diameter of the retaining portion to less than the inner diameter of the bearing hole, it is ensured that the retaining portion can reliably contact the end face of the bearing.

[0013] In one embodiment, there are two bearing pressure plates, and the abutting portions of the two bearing pressure plates are located on the same diameter of the bearing hole.

[0014] In this embodiment, the supporting portions of the two bearing pressure plates are arranged on the same diameter of the bearing hole so that the supporting portions of the two bearing pressure plates are symmetrical with the center of the bearing hole as the center of symmetry, thereby making the supporting portions of the two bearing pressure plates evenly distributed in the circumferential direction of the bearing, thereby ensuring that the bearing is subjected to relatively balanced forces in the circumferential direction, and further improving the reliability of the axial positioning of the bearing by the axial pressure plate.

[0015] In one embodiment, each bearing pressure plate is provided with a limiting protrusion, which is provided on the abutting portion and extends axially along the bearing hole to abut the bearing seat, and the limiting protrusion is used to limit the abutting portion from rotating around the fixing portion.

[0016] In this embodiment, a limiting protrusion is provided on the supporting portion and the limiting protrusion is used to support the bearing seat. This structure is not only simple in construction and can play a role in pre-positioning when assembling the bearing pressure plate and the bearing, but can also prevent the supporting portion from rotating around the fixed portion, thereby improving the reliability of the axial positioning of the bearing pressure plate on the bearing.

[0017] In one embodiment, the number of the limiting protrusions is at least two, wherein one limiting protrusion is provided at one end of the supporting portion, and the other limiting protrusion is provided at the other end of the supporting portion.

[0018] In one embodiment, a limiting hole adapted to the limiting protrusion is opened on the end surface, and the limiting protrusion is supported in the limiting hole.

[0019] In one embodiment, the bearing seat includes an outer peripheral wall connected to the end surface, and the limiting protrusion abuts against the outer peripheral wall.

[0020] In one embodiment, the at least two bearing pressure plates are evenly distributed in the circumferential direction of the bearing hole.

[0021] In one embodiment, at least one bearing pressure plate further includes an oil guide portion, which is connected to the fixing portion and extends away from the bearing hole in a radial direction of the bearing hole.

[0022] In one embodiment, along the circumference of the bearing hole, the thickness of the end of the supporting portion away from the fixing portion is greater than the thickness of the end of the supporting portion close to the fixing portion, and the thickness direction of the supporting portion is parallel to the axial direction of the bearing hole.

[0023] In this embodiment, since the fixing portion is connected to the middle portion of the abutting portion, the abutting portion can be considered a cantilever beam extending from the fixing portion. By setting the thickness of the abutting portion at the end relatively far from the fixing portion to be greater than the thickness at the end relatively close to the fixing portion, the end of the abutting portion relatively far from the fixing portion can abut the bearing, thereby increasing the effective contact area between the abutting portion and the bearing, thereby improving the reliability of the bearing pressure plate in axially positioning the bearing.

[0024] In one embodiment, the thickness of the supporting portion in the axial direction of the bearing hole gradually increases from a position close to the fixing portion toward a position far from the fixing portion.

[0025] In this embodiment, the abutting portion can be regarded as a cantilever beam of the fixing portion, and the end of the abutting portion away from the fixing portion may be tilted. The thickness of the abutting portion is set to a gradual trend to ensure that the entire abutting portion can abut against the bearing, thereby further increasing the reliability of the bearing axial positioning.

[0026] In one embodiment, the fixing portion includes a through hole, the bearing seat includes a threaded hole, the threaded hole is located on the end surface and is spaced apart from the bearing hole, and the fixing portion is fixed to the threaded hole by a bolt passing through the through hole.

[0027] In this embodiment, the bearing pressure plate is fixed to the bearing seat by bolts. This fixing method is not only reliable but also easy to disassemble and assemble.

[0028] In one embodiment, each bearing pressure plate is further provided with an oil baffle, which is located on the side of the fixed portion away from the bearing hole along the radial direction of the bearing hole. The oil baffle is used to block splashing oil and guide it to the bearing hole.

[0029] In this embodiment, an oil baffle is integrated on the bearing pressure plate to utilize the structure to block splashing oil and guide it to the bearing hole, thereby improving the lubrication condition of the bearing.

[0030] In one embodiment, the bearing pressure plate is further provided with an oil guide groove, which is located at the end of the bearing pressure plate away from the bearing along the axial direction of the bearing hole, and extends from away from the bearing hole toward close to the bearing hole along the radial direction of the bearing hole.

[0031] In this embodiment, an oil guide groove is provided in the bearing pressure plate to limit the flow path of the oil splashing onto the bearing pressure plate, so that the oil can accurately flow into the bearing hole to lubricate the bearing, thereby improving the utilization rate of the oil.

[0032] In a second aspect, the present application provides a motor, comprising a bearing and a bearing retaining structure as described in any of the above embodiments, wherein the bearing is installed in a bearing hole of the bearing retaining structure.

[0033] It can be understood that the motor provided in the second aspect of the present application, because it adopts the bearing limiting structure provided in the first aspect of the present application, also has all possible beneficial effects of any embodiment provided in the first aspect of the present application.

[0034] In one embodiment, the abutting portion abuts against the outer ring of the bearing.

[0035] In a third aspect, the present application provides an electric assembly comprising a reducer and the motor provided in the second aspect of the present application, wherein the reducer is in driving connection with the motor and is used to adjust the speed and / or torque output by the motor.

[0036] It can be understood that the electric assembly provided in the third aspect of the present application, because it adopts the motor provided in the second aspect of the present application, also has all possible beneficial effects of any embodiment provided in the second aspect of the present application.

[0037] In a fourth aspect, the present application provides a vehicle comprising a vehicle body and the electric assembly provided in the third aspect of the present application, wherein the electric assembly is fixed to the vehicle body and is used to provide power to the vehicle body.

[0038] It can be understood that the vehicle provided in the fourth aspect of the present application, because it adopts the electric assembly provided in the third aspect of the present application, also has all possible beneficial effects of any embodiment provided in the third aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 This is a schematic structural diagram of a motor provided in one embodiment of the present application;

[0041] Figure 2 This is a schematic cross-sectional structural diagram of a motor provided in one embodiment of the present application;

[0042] Figure 3 This is a structural schematic diagram of a bearing limiting structure provided in one embodiment of the present application from one side perspective;

[0043] Figure 4 This is a structural schematic diagram of a bearing pressure plate provided in one embodiment of the present application;

[0044] Figure 5 This is a schematic structural diagram of a motor provided in one embodiment of the present application from an axial perspective of a bearing;

[0045] Figure 6 This is a structural schematic diagram of a bearing limiting structure provided in one embodiment of the present application from another side perspective;

[0046] Figure 7 This is a structural diagram of a motor provided in another embodiment of the present application;

[0047] Figure 8 A schematic cross-sectional view of a motor provided in another embodiment of the present application;

[0048] Figure 9 This is a structural schematic diagram of a bearing limiting structure provided in another embodiment of the present application from one side perspective;

[0049] Figure 10 This is a schematic structural diagram of a bearing pressure plate provided in another embodiment of the present application.

[0050] Figure numbers: 200-motor; 201-rotating shaft; 202-bearing; 203-inner ring; 204-outer ring; 100-bearing limiting structure; 10-bearing seat; 11-end face; 12-bearing hole; 13-outer peripheral wall; 14-threaded hole; 20-bearing pressure plate; 21-fixing part; 211-through hole; 22-supporting part; 221-first arc segment; 222-second arc segment; 30-limiting protrusion; 40-bolt; 50-oil guide part; 51-oil baffle. DETAILED DESCRIPTION

[0051] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0052] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," and so on, in the specification, claims, and accompanying drawings of this application are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "include," "may include," "comprise," or "may include" as used in this application indicate the presence of the corresponding functions, operations, components, etc. disclosed, and do not limit the presence or absence of one or more additional functions, operations, components, etc. Furthermore, the terms "include" or "comprising" indicate the presence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0055] Please see Figures 1 to 4 ,in Figure 1 This is a structural diagram of a motor 200 provided in one embodiment of the present application; Figure 2 A schematic cross-sectional view of a motor 200 provided in one embodiment of the present application; Figure 3 This is a structural schematic diagram of a bearing limiting structure 100 provided in one embodiment of the present application from one side perspective; Figure 4 This is a structural schematic diagram of a bearing pressure plate 20 provided in an embodiment of the present application.

[0056] like Figures 1 to 4 As shown, in one embodiment, the motor 200 provided in the present application includes a rotating shaft 201, a bearing 202, and a bearing retaining structure 100. The rotating shaft 201 is connected to the inner ring 203 of the bearing 202 and can rotate relative to the outer ring 204 of the bearing 202. The bearing retaining structure 100 is used to limit the axial displacement of the bearing 202. Specifically, the bearing retaining structure 100 includes a bearing seat 10 and a bearing pressure plate 20. The bearing seat 10 has an end face 11, which is provided with a bearing hole 12. The axis of the bearing hole 12 is perpendicular to the end face 11. The bearing 202 is installed in the bearing hole 12 of the bearing retaining structure 100. That is, the outer ring 204 of the bearing 202 is installed in the bearing hole 12. The bearing seat 10 is used to support and fix the bearing 202. The inner ring 203 of the bearing 202 is rotatable relative to the bearing seat 10. The bearing 202 is used to reduce friction loss during the movement of the rotating shaft 201.

[0057] There are two bearing pressure plates 20, and both bearing pressure plates 20 are fixed to the end face of the bearing seat 10 and arranged along the circumference of the bearing hole 12, and the two bearing pressure plates 20 are symmetrically arranged about the axial cross-section of the rotating shaft 201. Furthermore, each bearing pressure plate 20 includes a fixing portion 21 and a supporting portion 22 that are connected to each other. The fixing portion 21 is fixed to the bearing seat 10, and the supporting portion 22 is located on the side of the fixing portion 21 close to the center of the bearing hole 12, that is, the supporting portion 22 is located on the side of the fixing portion 21 close to the bearing 202 along the radial direction of the bearing 202. The supporting portion 22 is supported on the end face 11, and along the axial direction of the bearing hole 12, the supporting portion 22 at least partially overlaps with the bearing hole 12. That is, along the axial direction of the bearing hole 12, the supporting portion 22 at least partially overlaps with the projection of the bearing hole 12 on any cross section of the rotating shaft 201. Alternatively, it can be understood that the abutting portion 22 extends from the end surface 11 toward the bearing hole 12 along the radial direction of the bearing hole 12, and at least partially extends to the corresponding area of ​​the bearing hole 12, so that the abutting portion 22 can abut the bearing 202. In this way, the abutting portion 22 can limit the axial movement of the bearing 202 in the bearing hole 12.

[0058] It can be understood that the bearing limiting structure 100 provided in the present application realizes circumferential positioning of the bearing 202 by setting a bearing seat 10, so as to fix and support the bearing 202 in the circumferential direction. At the same time, a bearing pressure plate 20 is set on the end face 11 of the bearing seat 10 to limit the axial displacement of the bearing 202 in the axial direction. Furthermore, the bearing limiting structure 100 of the present application realizes axial positioning of the bearing 202 by utilizing two bearing pressure plates 20 to cooperate with each other. During assembly, as long as the fixing portion 21 of each bearing pressure plate 20 is fixed to the bearing seat 10 respectively, assembly can be achieved. That is, the present application adopts a split structure to perform axial positioning of the bearing 202, which can reduce assembly accuracy and reduce assembly difficulty. In addition, the split bearing pressure plate 20 has a simple structure and low material consumption, which can reduce costs and reduce weight, and is in line with the lightweight design pursued by the current automotive industry.

[0059] It should be noted that, in the above embodiment, the number and relative position of the bearing pressure plates 20 are only introduced as an embodiment. That is, in other embodiments, the number and relative position of the bearing pressure plates 20 can be adaptively adjusted according to actual conditions, and this application does not specifically limit this. For example, in another embodiment, the number of bearing pressure plates 20 can be three, four, or other numbers. When the number of bearing pressure plates 20 is three, each two adjacent bearing pressure plates 20 can be arranged at a central angle of 120°, thereby ensuring that the bearing 202 is uniformly stressed in the axial direction; when the number of bearing pressure plates 20 is four, each two adjacent bearing pressure plates 20 can be arranged at a central angle of 90°, thereby ensuring that the bearing 202 is uniformly stressed in the axial direction. In the above embodiment, only two symmetrically distributed bearing pressure plates 20 are used to limit the axial displacement of the bearing 202, which can not only ensure uniform force and positioning reliability, but also reduce material consumption and manufacturing costs.

[0060] In one embodiment, there are at least two bearing pressure plates 20, and the at least two bearing pressure plates 20 are evenly distributed along the circumference of the bearing hole 12. It will be understood that the at least two bearing pressure plates 20 are evenly distributed along the circumference of the bearing hole 12, that is, the split bearing pressure plates 20 of the present application are arranged in a symmetrical structure, thereby ensuring that the bearing pressure plates 20 can reliably press the bearing 202 in the axial direction of the bearing hole 12, thereby improving the reliability of the axial positioning of the bearing 202.

[0061] Please see Figure 5 , Figure 5 Schematic diagram of the structure of the motor 200 provided in one embodiment of the present application from the axial perspective of the bearing 202 .

[0062] like Figure 5As shown, in one embodiment, the supporting portion 22 is arc-shaped, and the fixing portion 21 is connected to the middle of the supporting portion 22. The inner diameter of the supporting portion 22 is smaller than the inner diameter of the bearing hole 12, and the inner diameter of the supporting portion 22 is also larger than the inner diameter of the outer ring 204 of the bearing 202. It can be understood that in this embodiment, setting the supporting portion 22 to be arc-shaped can optimize the spatial layout of the bearing limiting structure 100 and avoid motion interference between the supporting portion 22 and the rotating shaft 201 or other components of the motor 200. The fixing portion 21 is connected to the middle of the supporting portion 22, so that each bearing pressure plate 20 takes the fixing portion 21 fixed to the bearing seat 10 as the starting point, and extends two clamp arms along the circumference of the bearing hole 12, and uses the clamp arms to support the bearing 202 to prevent the bearing 202 from axial movement.

[0063] Furthermore, by limiting the inner diameter of the abutting portion 22 to be smaller than the inner diameter of the bearing hole 12, it is ensured that the abutting portion 22 can reliably abut the end face of the bearing 202 located in the bearing hole 12. At the same time, by limiting the inner diameter of the abutting portion 22 to be larger than the inner diameter of the outer ring 204 of the bearing 202, that is, by ensuring that the inner diameter of the abutting portion 22 is between the inner and outer diameters of the outer ring of the bearing 202, it is possible to prevent the abutting portion 22 from interfering with the movement of the balls sleeved within the outer ring 204 of the bearing 202, thereby ensuring that the bearing 202 can function properly.

[0064] In one embodiment, there are two bearing pressure plates 20, and the abutting portions 22 of the two bearing pressure plates 20 are located on the same diameter of the bearing hole 12, that is, the abutting portions 22 of the two bearing pressure plates 20 are symmetrical with the center of the bearing hole 12 as the center of symmetry. It can be understood that since the abutting portion 22 is the contact portion between the bearing pressure plate 20 and the bearing 202, the abutting portion 22 of one bearing pressure plate 20 is set to be symmetrical with the abutting portion 22 of the other bearing pressure plate 20, so that the abutting portions 22 of the two bearing pressure plates 20 are evenly distributed in the circumferential direction of the bearing 202, thereby ensuring that the force on the bearing 202 in the circumferential direction is relatively balanced, and further improving the reliability of the axial positioning of the bearing 202 by the axial pressure plate.

[0065] Please see Figure 6 , Figure 6 This is a structural schematic diagram of the bearing limiting structure 100 provided in an embodiment of the present application from another side perspective.

[0066] like Figures 1 to 6In one embodiment, each bearing pressure plate 20 is provided with a limiting protrusion 30, which is provided on the abutting portion 22. The limiting protrusion 30 extends along the axial direction of the bearing hole 12 toward the bearing seat 10 to abut the bearing seat 10. The limiting protrusion 30 is used to limit the rotation of the abutting portion 22 around the fixed portion 21. It can be understood that in this embodiment, the limiting protrusion 30 is used to abut the bearing seat 10. This structure is not only simple in structure and can play a role in pre-positioning when assembling the bearing pressure plate 20 and the bearing 202, but also can prevent the abutting portion 22 from rotating around the fixed portion 21, thereby improving the reliability of the axial positioning of the bearing pressure plate 20 with respect to the bearing 202.

[0067] In one embodiment, the abutting portion 22 includes a first arc segment 221 and a second arc segment 222. The first arc segment 221 is connected to the second arc segment 222 and is symmetrical about a line passing through the midpoint of the fixing portion 21. There are two limiting protrusions 30. One of the limiting protrusions 30 is provided at one end of the abutting portion 22, and the other limiting protrusion 30 is provided at the other end of the abutting portion 22. That is, one of the limiting protrusions 30 is provided on the first arc segment 221, and the other limiting protrusion 30 is provided on the second arc segment 222. Both limiting protrusions 30 abut the bearing seat 10.

[0068] It is understandable that, since the abutting portion 22 is located on the periphery of the rotating shaft 201, the rotating shaft 201 may abut the abutting portion 22 from any circumferential direction when rotating, causing the abutting portion 22 to move in a direction away from the rotating shaft 201. The present application provides at least two limiting protrusions 30 at both ends of the abutting portion 22, which can reliably limit the position of the abutting portion 22 and prevent the abutting portion 22 from moving under the abutment of the rotating shaft 201. In addition, this design can also avoid force concentration and disperse the force to both ends of the abutting portion 22, which can increase the service life of the bearing pressure plate 20. Furthermore, each limiting protrusion 30 is provided at one end of the abutting portion 22 away from the fixed portion 21.

[0069] It should be noted that the number of the limiting protrusions 30 in the above embodiment is only introduced as an embodiment, that is, in other embodiments, the number of the limiting protrusions 30 includes but is not limited to two, and this application does not make any special limitation on this.

[0070] In one embodiment, the end surface 11 is provided with limiting holes (not shown). The number and position of the limiting holes correspond to the number and position of the limiting protrusions 30. Each limiting hole is adapted to fit a limiting protrusion 30. The limiting protrusions 30 extend into the limiting holes and abut against them, thereby reliably positioning the abutting portion 22.

[0071] In one embodiment, the bearing seat 10 includes an outer peripheral wall 13 connected to the end surface 11. The outer peripheral wall 13 surrounds the outer periphery of the bearing hole 12. The limiting protrusion 30 abuts against the outer peripheral wall 13. As will be appreciated, abutting the limiting protrusion 30 against the outer peripheral wall 13 ensures that the limiting protrusion 30 reliably prevents the bearing pressure plate 20 from rotating. Furthermore, it avoids the need for holes in the bearing seat 10, simplifying the structure while minimizing any impact on the strength of the bearing seat 10.

[0072] In one embodiment, along the circumference of the bearing hole 12 , the thickness of the end of the supporting portion 22 relatively away from the fixing portion 21 is greater than the thickness of the end of the supporting portion 22 relatively close to the fixing portion 21 , wherein the thickness direction of the supporting portion 22 is parallel to the axial direction of the bearing hole 12 .

[0073] It can be understood that in this embodiment, since the fixing portion 21 is connected to the middle portion of the supporting portion 22, the supporting portion 22 can be regarded as two cantilever beams extending from the fixing portion 21 along the circumference of the bearing hole 12, respectively. Each cantilever beam has an end relatively far away from the fixing portion 21 and an end relatively close to the fixing portion 21, and the thickness of the end of each cantilever beam far away from the fixing portion 21 is greater than the thickness of the end close to the fixing portion 21. Since the end of the supporting portion 22 far away from the fixing portion 21 may be tilted and thus unable to reliably abut the bearing 202, the present application sets the thickness of the end of the supporting portion 22 relatively far away from the fixing portion 21 to be greater than the thickness of the end relatively close to the fixing portion 21, so as to ensure that the end of the supporting portion 22 relatively far away from the fixing portion 21 can abut the bearing 202, thereby increasing the effective contact area between the supporting portion 22 and the bearing 202, thereby improving the reliability of the axial positioning of the bearing 202 by the bearing pressure plate 20.

[0074] In another embodiment, the thickness of the abutting portion 22 in the axial direction of the bearing hole 12 may gradually increase from a position close to the fixing portion 21 to a position away from the fixing portion 21. It is understood that the thickness of the abutting portion 22 is set to have a gradual trend to ensure that the entire abutting portion 22 can abut against the bearing 202, thereby further increasing the reliability of the axial positioning of the bearing 202.

[0075] exist Figures 1 to 4 In the illustrated embodiment, the fixing portion 21 includes a through hole 211, and the bearing seat 10 includes a threaded hole 14. The threaded hole 14 is located on the end surface 11 and is spaced apart from the bearing hole 12. The fixing portion 21 is fixed to the threaded hole 14 by a bolt 40 passing through the through hole 211. As can be understood, the use of the bolt 40 to fix the bearing pressure plate 20 to the bearing seat 10 is not only reliable but also easy to assemble and disassemble.

[0076] In one embodiment, the present application provides an electric assembly, which includes a reducer and a motor 200 as provided in any of the above embodiments. The reducer is in driving connection with the motor 200 and is used to adjust the speed and / or torque output by the motor 200.

[0077] In one embodiment, the present application provides a vehicle, comprising a vehicle body and an electric assembly as provided in any of the above embodiments. The electric assembly is fixed to the vehicle body and is used to provide power to the vehicle body.

[0078] Please see Figures 7 to 10 ,in Figure 7 This is a structural diagram of a motor 200 provided in another embodiment of the present application; Figure 8 A schematic cross-sectional view of a motor 200 provided in another embodiment of the present application; Figure 9 This is a structural schematic diagram of a bearing limiting structure 100 provided in another embodiment of the present application from one side perspective; Figure 10 This is a structural schematic diagram of a bearing pressure plate 20 provided in another embodiment of the present application.

[0079] like Figures 7 to 10 In one embodiment, the motor 200 of the present application is applied to a gearbox of a vehicle (not shown in the figure), and the gearbox has a reducer. The reducer is connected to the motor 200 in a transmission manner. Specifically, the reduction gear set of the reducer is connected to the rotating shaft 201 of the motor 200 in a transmission manner and cooperates with each other to adjust the speed and / or torque output by the motor 200 to adapt to different driving conditions and road conditions. The gearbox is usually filled with oil to lubricate components such as the reduction gear assembly and the bearings 202 in the motor 200. At least one bearing pressure plate 20 also includes an oil guide portion 50. The oil guide portion 50 is connected to the fixed portion 21. The oil guide portion 50 extends away from the bearing hole 12 along the radial direction of the bearing hole 12. It can be understood that the oil guide portion 50 is provided on the bearing pressure plate 20, and the oil splashed onto the bearing pressure plate 20 can be partially attached to the oil guide portion 50 and can enter the bearing 202 along the oil guide portion 50 to improve the lubrication of the bearing 202.

[0080] Specifically, in one embodiment, the bearing pressure plate 20 includes an oil baffle 51. The oil baffle 51 is located on the side of the fixing portion 21 facing away from the bearing hole 12 in the radial direction of the bearing hole 12. Alternatively, the oil baffle 51 extends from the fixing portion 21 in the direction away from the bearing hole 12 in the radial direction of the bearing hole 12. The oil baffle 51 is used to block oil splashing from the transmission case and guide it to the bearing hole 12.

[0081] As will be appreciated, in this embodiment, an oil baffle 51 is integrated on the bearing pressure plate 20 to utilize this structure to block splashing oil and direct it to the bearing hole 12, thereby improving the lubrication of the bearing 202. Furthermore, the oil baffle 51 has a simple structure, is easy to manufacture, and does not affect the structural strength of the bearing pressure plate 20.

[0082] In the above embodiment, the cross-sectional structure of the oil baffle 51 is similar to a rectangle. In another embodiment, the cross-sectional structure of the oil baffle 51 can be set to be similar to a trapezoid. The end of the oil baffle 51 with a larger area is farther away from the fixed portion 21 than the end with a smaller area. It can be understood that by setting the cross-sectional structure of the oil baffle 51 to be trapezoidal and setting the large area portion on the side away from the fixed portion 21, the larger area portion of the oil baffle 51 can be used to block more oil, and the smaller area portion can be used to concentrate the oil and guide it to the fixed portion 21. The oil can flow along the supporting portion 22 or the fixed portion 21 into the bearing hole 12 to lubricate the bearing 202, thereby improving the lubrication effect.

[0083] In one embodiment, the bearing pressure plate 20 is further provided with an oil guide groove (not shown). The oil guide groove is located at the end of the bearing pressure plate 20 away from the bearing 202 along the axial direction of the bearing hole 12 and extends radially from away from the bearing hole 12 toward closer to the bearing hole 12. It will be appreciated that providing the oil guide groove in the bearing pressure plate 20 can limit the flow path of oil splashing onto the bearing pressure plate 20, allowing the oil to flow accurately into the bearing hole 12 to lubricate the bearing 202, thereby improving oil utilization.

[0084] It should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise specifically defined.

[0085] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] It should be understood that the application of this application is not limited to the above examples. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the scope of protection of the claims appended to this application. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A bearing limiting structure, characterized in that: include: The bearing seat has an end surface, and a bearing hole is formed on the end surface with an axis perpendicular to the end surface; at least two bearing pressure plates fixed to the end surface and arranged along the circumference of the bearing hole; Each of the bearing pressure plates includes a fixing portion and a supporting portion that are interconnected. The fixing portion is fixed to the bearing seat, and the supporting portion is supported on the end face. Along the axial direction of the bearing hole, the supporting portion at least partially overlaps with the bearing hole to limit the axial movement of the bearing in the bearing hole.

2. The bearing limiting structure according to claim 1, characterized in that: The supporting portion is arc-shaped, the fixing portion is connected to the middle portion of the supporting portion, and the inner diameter of the supporting portion is smaller than the inner diameter of the bearing hole.

3. The bearing limiting structure according to claim 2, characterized in that: Each of the bearing pressure plates is provided with a limiting protrusion, which is provided on the abutting portion and extends axially along the bearing hole to abut against the bearing seat. The limiting protrusion is used to limit the abutting portion from rotating around the fixing portion.

4. The bearing limiting structure according to claim 3, characterized in that: The number of the limiting protrusions is at least two, wherein one of the limiting protrusions is arranged at one end of the supporting portion, and the other of the limiting protrusions is arranged at the other end of the supporting portion.

5. The bearing limiting structure according to claim 3, characterized in that: A limiting hole adapted to the limiting protrusion is provided on the end surface, and the limiting protrusion is held in the limiting hole; or, The bearing seat includes an outer peripheral wall connected to the end surface, and the limiting protrusion is supported on the outer peripheral wall.

6. The bearing limiting structure according to claim 1, characterized in that: The at least two bearing pressure plates are evenly distributed in the circumferential direction of the bearing hole.

7. The bearing limiting structure according to claim 1, characterized in that: At least one of the bearing pressure plates further includes an oil guide portion, which is connected to the fixing portion and extends away from the bearing hole in a radial direction of the bearing hole.

8. The bearing limiting structure according to claim 1, characterized in that: Along the circumference of the bearing hole, the thickness of the end of the supporting portion away from the fixing portion is greater than the thickness of the end of the supporting portion close to the fixing portion, and the thickness direction of the supporting portion is parallel to the axial direction of the bearing hole.

9. The bearing limiting structure according to claim 1, characterized in that: The fixing portion includes a through hole, the bearing seat includes a threaded hole, the threaded hole is located on the end surface and is spaced apart from the bearing hole, and the fixing portion is fixed to the threaded hole by a bolt passing through the through hole.

10. A motor, characterized in that: It comprises a bearing and a bearing limiting structure according to any one of claims 1 to 9, and the bearing is installed in the bearing hole.

11. The motor according to claim 10, characterized in that The abutting portion abuts against the outer ring of the bearing.

12. An electric assembly, characterized in that: Comprising the motor according to claim 10 or 11.

13. A vehicle, characterized in that: Comprising the electric assembly as claimed in claim 12.

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