Deep groove ball bearing, driving motor and new energy automobile

Abstract

The utility model relates to the technical field of bearings, in particular to a deep groove ball bearing, a driving motor and a new energy automobile. The deep groove ball bearing comprises a bearing outer ring, a bearing inner ring and a ball, and when the deep groove ball bearing is applied, lubricating oil can enter the space between the bearing outer ring and the bearing inner ring through a first oil inlet through hole and a second oil inlet through hole and directly enter a first annular groove and a second annular groove so as to provide lubrication for the movement process of the ball; the friction and heat of the balls during movement in the raceway are reduced, and a bearing lubrication system is stably optimized for a long time. Lubricating oil can enter the first oil inlet through hole more easily through the first arc-shaped wall face, and lubricating oil can enter the second oil inlet through hole more easily through the second arc-shaped wall face.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearings, in particular to a deep groove ball bearing, a driving motor and a new energy vehicle. BACKGROUND

[0002] With the rapid development of the new energy vehicle industry, high power density driving motors have put forward more stringent requirements for the reliability of key components. As the core supporting component of the motor rotor system, the open deep groove ball bearing is widely used due to its compact structure and strong load capacity. However, under the condition of continuous high-speed operation, the bearing faces the technical bottleneck of lubricating medium failure of the rolling ball: the axial / radial composite load generated during the operation of the motor causes significant accumulation of friction heat in the contact area, and the working temperature is continuously in a high temperature state. The traditional lithium-based lubricating grease is prone to viscosity recession and base oil precipitation. How to build a long-term stable bearing lubrication system has become a key technical challenge to improve the service life and operation reliability of the driving motor. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a deep groove ball bearing, a driving motor and a new energy vehicle, which can continuously supplement lubricating oil in the raceway, thereby building a long-term stable bearing lubrication system.

[0004] In a first aspect, the present application provides a deep groove ball bearing, comprising: a bearing outer ring, a plurality of first oil inlet through holes are arranged along the radial direction, and a first arc-shaped wall surface is arranged at the opening of the first oil inlet through hole on the circumferential surface of the bearing outer ring; a bearing inner ring, a plurality of second oil inlet through holes are arranged along the radial direction, and a second arc-shaped wall surface is arranged at the opening of the second oil inlet through hole on the inner side wall of the bearing inner ring, a first annular groove is arranged on the inner side wall of the bearing outer ring facing the bearing inner ring, a second annular groove is arranged on the circumferential surface of the bearing inner ring facing the bearing outer ring, and the first annular groove and the second annular groove are matched to form a raceway; and a rolling ball, which is movably arranged in the raceway; wherein at least one first oil inlet through hole is connected to the first annular groove, and at least one second oil inlet through hole is connected to the second annular groove.

[0005] In combination with the first aspect, in a possible implementation manner, the first size of the opening of the first oil inlet through hole on the inner side wall of the bearing outer ring is smaller than the second size of the opening of the first oil inlet through hole on the circumferential surface of the bearing outer ring.

[0006] In combination with the first aspect, in a possible implementation manner, the caliber of the first oil inlet through hole gradually decreases along a first direction, and the first direction is the direction of the radial direction of the bearing outer ring inward.

[0007] In conjunction with the first aspect, in one possible implementation, the third dimension of the opening of the second oil inlet hole on the circumferential surface of the bearing inner ring is smaller than the fourth dimension of the opening of the second oil inlet hole on the inner sidewall of the bearing outer ring.

[0008] In conjunction with the first aspect, in one possible implementation, the diameter of the second oil inlet gradually decreases along a second direction, which is the radially outward direction of the inner ring of the bearing.

[0009] In conjunction with the first aspect, in one possible implementation, there are multiple first oil inlet holes, the positions of the first oil inlet holes on both sides of the first cross section are symmetrical and the number is the same, and the first cross section is a radial cross section passing through the geometric center of the outer ring of the bearing.

[0010] In conjunction with the first aspect, in one possible implementation, there are multiple second oil inlet holes, the positions of the second oil inlet holes on both sides of the second cross section are symmetrical and the number is the same, and the second cross section is a radial cross section passing through the geometric center of the bearing inner ring.

[0011] In conjunction with the first aspect, one possible implementation further includes: a retainer disposed between the outer ring and the inner ring of the bearing and connected to the balls.

[0012] Secondly, this application provides a drive motor, including the aforementioned deep groove ball bearing.

[0013] Thirdly, this application provides a new energy vehicle, including the aforementioned drive motor.

[0014] In application, lubricating oil can enter the space between the outer and inner rings of the bearing through the first and second oil inlet holes, and directly into the first and second annular grooves, thereby providing lubrication for the movement of the balls, reducing friction and heat during the movement of the balls in the raceway, and optimizing the bearing lubrication system in a long-term and stable manner. The first arc-shaped wall surface facilitates easier entry of lubricating oil into the first oil inlet hole, and the second arc-shaped wall surface facilitates easier entry of lubricating oil into the second oil inlet hole. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural schematic of a deep groove ball bearing provided in an embodiment of this application.

[0016] Figure 2 As shown Figure 1 A magnified schematic diagram of part of the structure.

[0017] Figure 3 As shown Figure 1 A schematic diagram illustrating the use of deep groove ball bearings. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] An example deep groove ball bearing is as follows:

[0020] Figure 1 The diagram shown is a structural schematic of a deep groove ball bearing provided in an embodiment of this application. Figure 2 As shown Figure 1 A partially enlarged structural schematic diagram. This application provides a deep groove ball bearing, in one embodiment, such as... Figure 1 and Figure 2 As shown, the deep groove ball bearing includes: an outer ring 1, an inner ring 2, and balls 3. The outer ring 1 has multiple first oil inlet holes 101 radially, and each first oil inlet hole 101 has a first arc-shaped wall surface 1011 at its opening on the circumferential surface of the outer ring 1. The inner ring 2 has multiple second oil inlet holes 201 radially, and each second oil inlet hole 201 has a second arc-shaped wall surface 2011 at its opening on the inner sidewall of the inner ring 2. The inner sidewall of the outer ring 1 facing the inner ring 2 has a first annular groove 102, and the circumferential surface of the inner ring 2 facing the outer ring 1 has a second annular groove 202. The first and second annular grooves 102 cooperate to form a raceway 100. The balls 3 are movably disposed in the raceway 100. At least one first oil inlet hole 101 connects to the first annular groove 102, and at least one second oil inlet hole 201 connects to the second annular groove 202.

[0021] The bearing structure in this embodiment is an open bearing. The entire bearing is installed in a bearing housing, which circulates lubricating oil. The lubricating oil can enter between the outer ring 1 and the inner ring 2 of the bearing through the first oil inlet hole 101 and the second oil inlet hole 201, and directly enter the first annular groove 102 and the second annular groove 202, thereby providing lubrication for the movement of the balls 3, reducing the friction and heat of the balls 3 when moving in the raceway 100, and optimizing the bearing lubrication system in a long-term and stable manner. The first arc-shaped wall surface 1011 facilitates the easier entry of lubricating oil into the first oil inlet hole 101, and the second arc-shaped wall surface 2011 facilitates the easier entry of lubricating oil into the second oil inlet hole 201.

[0022] Figure 3 As shown Figure 1 A schematic diagram illustrating the use of deep groove ball bearings. When using them, as follows... Figure 3As shown, the rotating shaft 5 is inserted into the bearing inner ring 2, the whole bearing is installed in the bearing chamber 6, the outside of the bearing outer ring 1 is provided with an oil cavity 601, the lubricating oil in the oil cavity 601 can enter the bearing outer ring 1 and the bearing inner ring 2 through the first oil inlet hole 101 to lubricate the ball 3, and then pass through the second oil inlet hole 201 to the rotating shaft 5. The rotating shaft 5 is a hollow rotating shaft and is provided with an oil delivery hole 501, which can guide the lubricating oil into the rotating shaft. The lubricating oil in the rotating shaft and the oil cavity 601 form a lubricating oil circulation.

[0023] Specifically, the first size of the opening of the first oil inlet hole 101 on the inner side wall of the bearing outer ring 1 is smaller than the second size of the opening of the first oil inlet hole 101 on the circumferential surface of the bearing outer ring 1, which can facilitate the lubricating oil to enter the bearing outer ring 1 and the bearing inner ring 2 through the first oil inlet hole 101, and can to some extent inhibit the lubricating oil from escaping from the bearing outer ring 1 and the bearing inner ring 2.

[0024] Specifically, as shown in the figure, Figure 2 The caliber of the first oil inlet hole 101 gradually decreases along the first direction, and the first direction is the direction of the radial direction of the bearing outer ring 1 inward, which can further prevent the lubricating oil from escaping from the bearing outer ring 1 and the bearing inner ring 2. The gradually decreasing manner of the caliber of the first oil inlet hole 101 can be linear change or nonlinear change of the caliber of other parts except the first arc-shaped wall 1011.

[0025] Specifically, the third size of the opening of the second oil inlet hole 201 on the circumferential surface of the bearing inner ring 2 is smaller than the fourth size of the opening of the second oil inlet hole 201 on the inner side wall of the bearing inner ring 2, which can facilitate the lubricating oil to enter the bearing outer ring 1 and the bearing inner ring 2 through the second oil inlet hole 201, and can to some extent inhibit the lubricating oil from escaping from the bearing outer ring 1 and the bearing inner ring 2.

[0026] Specifically, as shown in the figure, Figure 2 The caliber of the second oil inlet hole 201 gradually decreases along the second direction, and the second direction is the direction of the radial direction of the bearing inner ring 2 outward, which can further prevent the lubricating oil from escaping from the bearing outer ring 1 and the bearing inner ring 2. The gradually decreasing manner of the caliber of the second oil inlet hole 201 can be linear change or nonlinear change of the caliber of other parts except the second arc-shaped wall 2011.

[0027] Specifically, as shown in the figure, Figure 2As shown, the number of first oil inlet holes 101 is multiple, the positions of the first oil inlet holes 101 on both sides of the first cross section are symmetrical to each other and the number is the same, and the first cross section is a radial cross section passing through the geometric center of the bearing outer ring 1. The number of second oil inlet holes 201 is multiple, the positions of the second oil inlet holes 201 on both sides of the second cross section are symmetrical to each other and the number is the same, and the second cross section is a radial cross section passing through the geometric center of the bearing inner ring 2. This can make the lubricating oil uniformly enter between the bearing outer ring 1 and the bearing inner ring 2, avoid uneven distribution of the amount of lubricating oil on both sides of the first cross section and the second cross section to a certain extent, and be beneficial to improving the service life of the ball 3. The plurality of first oil inlet holes 101 are uniformly arranged around the center of the bearing outer ring 1, and the plurality of second oil inlet holes 201 are uniformly arranged around the center of the bearing inner ring 2.

[0028] In an embodiment, as shown in Figure 1 and 2 The deep groove ball bearing further comprises a retainer 4 arranged between the bearing outer ring 1 and the bearing inner ring 2 and connected with the ball 3 to improve the stability of the ball 3.

[0029] An exemplary drive motor is as follows:

[0030] The application provides a drive motor comprising the aforementioned deep groove ball bearing.

[0031] An exemplary new energy vehicle is as follows:

[0032] The application provides a new energy vehicle comprising the aforementioned drive motor.

[0033] The above describes the basic principles of the application in combination with specific embodiments, but it should be pointed out that the advantages, advantages, effects and the like mentioned in the application are only examples and not limitations, and these advantages, advantages, effects and the like cannot be considered as the must-have of each embodiment of the application. In addition, the above specific details are only for the purpose of example and understanding, and are not limited to the application.

[0034] The block diagram of the device, apparatus, equipment, system involved in the application is only an illustrative example and is not intended to require or imply the connection, arrangement and configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatus, equipment, system can be connected, arranged and configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "include but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0035] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0036] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features of the present invention.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A deep groove ball bearing, characterized in that, The deep groove ball bearing comprises: a bearing outer ring (1) provided with a plurality of first oil inlet holes (101) in the radial direction, the first oil inlet holes (101) being provided with a first arc-shaped wall (1011) at the opening on the inner side wall of the bearing outer ring (1); a bearing inner ring (2) provided with a plurality of second oil inlet holes (201) in the radial direction, the second oil inlet holes (201) being provided with a second arc-shaped wall (2011) at the opening on the inner side wall of the bearing inner ring (2), the bearing outer ring (1) being provided with a first annular groove (102) on the inner side wall facing the bearing inner ring (2), the bearing inner ring (2) being provided with a second annular groove (202) on the circumferential surface facing the bearing outer ring (1), the first annular groove (102) and the second annular groove (202) cooperating to form a raceway (100); and a plurality of rolling balls (3) movably arranged in the raceway (100). At least one of the first oil inlet holes (101) is connected to the first annular groove (102), and at least one of the second oil inlet holes (201) is connected to the second annular groove (202).

2. The deep groove ball bearing according to claim 1, wherein the first size of the opening of the first oil inlet hole (101) on the inner side wall of the bearing outer ring (1) is smaller than the second size of the opening of the first oil inlet hole (101) on the circumferential surface of the bearing outer ring (1).

3. The deep groove ball bearing according to claim 2, wherein the caliber of the first oil inlet hole (101) gradually decreases along a first direction, and the first direction is the direction of the radial direction of the bearing outer ring (1) inward.

4. The deep groove ball bearing according to claim 1, wherein the third size of the opening of the second oil inlet hole (201) on the circumferential surface of the bearing inner ring (2) is smaller than the fourth size of the opening of the second oil inlet hole (201) on the inner side wall of the bearing outer ring (2).

5. The deep groove ball bearing according to claim 4, wherein the caliber of the second oil inlet hole (201) gradually decreases along a second direction, and the second direction is the direction of the radial direction of the bearing inner ring (2) outward.

6. The deep groove ball bearing according to claim 1, wherein the number of the first oil inlet holes (101) is multiple, the positions of the first oil inlet holes (101) on both sides of a first cross section are symmetrical and the same in number, and the first cross section is a radial cross section passing through the geometric center of the bearing outer ring (1).

7. The deep groove ball bearing according to claim 1, wherein the number of the second oil inlet holes (201) is multiple, the positions of the second oil inlet holes (201) on both sides of a second cross section are symmetrical and the same in number, and the second cross section is a radial cross section passing through the geometric center of the bearing inner ring (2).

8. The deep groove ball bearing of claim 1, wherein, Further comprising: a retainer (4) arranged between the bearing outer ring (1) and the bearing inner ring (2) and connected with the rolling balls (3).

9. A drive motor characterized by The deep groove ball bearing according to any one of claims 1 to 8.

10. A new energy vehicle, characterized in that, The motor drive according to claim 9.

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