High-speed ball bearing for power motor

Abstract

The embodiment of the invention provides a high-speed ball bearing for a power motor, and relates to the technical field of bearings. The high-speed ball bearing for the power motor comprises a bearing outer ring, a front end cover is integrally formed at the front end of the bearing outer ring, a rear end cover is integrally formed at the rear end of the bearing outer ring, a bearing inner ring is arranged in an inner cavity of the bearing outer ring in a sleeved mode, and a bearing isolation ring is arranged between the bearing outer ring and the bearing inner ring; a rolling assembly which is in running fit with the bearing outer ring and the bearing inner ring is arranged on the circumference of the bearing isolation ring, three groups of rolling bodies are adopted to supply stable rolling between the bearing outer ring and the bearing isolation ring and between the bearing outer ring and the bearing inner ring, and a lubricating assembly which supplies oil to the rolling assembly for lubrication is arranged between the bearing outer ring and the bearing isolation ring. The arrangement mode of the three rows of staggered balls is used for enhancing the overall meshing force in the rotating process of the high-speed ball bearing, and meanwhile the high-speed ball bearing has the efficient lubricating and double-sealing functions.

Description

Technical Field

[0001] The invention belongs to the technical field of bearings, and in particular relates to a high-speed ball bearing for a power motor. Background Art

[0002] High-speed ball bearings are high-rigidity industrial accessories, mainly used in high-speed and high-precision scenarios such as machine tool spindles, drone motors, and medical centrifuges. The product of their average diameter and the inner ring speed defines the performance level. Common models include angular contact ball bearings, spherical roller bearings, etc. High-speed ball bearings are commonly used components in power motors.

[0003] In the prior art (Patent Application No. CN104806637B, Patent Name: Noise Reduction Bearing), rollers are placed in self-lubricating grooves to maintain good lubrication between the rollers and the spacer blocks even after prolonged rotation, preventing the rollers from generating noise on the cage and thus reducing bearing noise. During the implementation of this technical solution, it was discovered that the prior art has at least the following problems:

[0004] When the output shaft of a power motor is used in conjunction with a high-speed ball bearing, it will be subjected to large stress generated by the output shaft's rotating torque. However, most of the high-speed ball bearings currently used adopt a single-row ball design and cannot utilize a three-row staggered ball arrangement to enhance the overall bite force during the rotation of the high-speed ball bearing. Over time, this causes the balls in the high-speed ball bearing to shift or even fall apart, resulting in a short service life and high maintenance frequency, which is not worth the cost. Summary of the Invention

[0005] This application aims to at least address the technical issues in the prior art, such as the inability to utilize a three-row staggered arrangement of balls to enhance the overall engagement force during rotation of high-speed ball bearings, as well as the lack of efficient lubrication and dual sealing. To this end, this application proposes a high-speed ball bearing for a power motor.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0007] A high-speed ball bearing for a power motor includes a bearing outer ring, a front end cover integrally formed at the front end of the bearing outer ring, and a rear end cover integrally formed at the rear end of the bearing outer ring, an inner ring of the bearing is sleeved in the inner cavity of the bearing outer ring, and a bearing isolation ring is provided between the bearing outer ring and the bearing inner ring;

[0008] The upper circumference of the bearing isolation ring is provided with a rolling assembly that rotates with the bearing outer ring and the bearing inner ring, and three sets of rolling elements are used to provide stable rolling between the bearing outer ring, the bearing isolation ring and the bearing inner ring, and a lubrication assembly is provided between the bearing outer ring and the bearing isolation ring to supply oil lubrication to the rolling assembly;

[0009] The rolling assembly includes an inner raceway and an outer raceway circumferentially opened on the inner side of the bearing outer ring and the bearing isolation ring, and the lubrication assembly includes an oil storage cavity annularly opened in the bearing outer ring, and an oil seepage hole circumferentially opened on one side of the bearing outer ring close to the inner raceway and the outer raceway for supplying oil to the inner roller and the outer roller for lubrication.

[0010] Preferably: the rolling assembly also includes an inner tooth groove opened in the inner raceway located on the bearing isolation ring, and an outer tooth groove in the outer raceway, and the inner cavity of the inner raceway is rollingly connected to the inner roller and adopts an elliptical ball design, as well as the inner teeth circumferentially fixed on the inner roller and engaged with the inner tooth groove, the inner cavity of the outer raceway is rollingly connected to the outer roller and adopts a spherical ball design, as well as the outer teeth circumferentially fixed on the outer roller and engaged with the outer tooth groove.

[0011] Preferably: the lubrication assembly also includes an inner oil channel and an outer oil channel which are staggeredly arranged on the outer ring of the bearing and the bearing isolation ring near the outer ends of the inner raceway and the outer raceway, and an inner flow groove and an outer flow groove which cooperate with the flow of the inner oil channel and the outer oil channel are respectively annularly arranged at the center of the inner roller and the outer roller, and both ends of the inner roller are fixedly connected with a spoiler head which cooperates with the spoiler of the outer oil channel, and a dirt suction piece is embedded in the spoiler head.

[0012] Preferably, the inner raceway and the outer raceway are staggered along the transverse axis of the bearing outer ring and the bearing isolation ring, and the inner teeth on the inner roller and the outer teeth on the outer roller are rollingly connected with the inner raceway and the outer raceway on the bearing outer ring.

[0013] Preferably, the depths of the inner oil passages and the outer oil passages are greater than the depths of the inner raceway and the outer raceway, and the inner oil passages and the outer oil passages are also distributed in a circumferentially staggered manner as are the inner and outer tooth grooves.

[0014] Preferably, the inner cavity of the bearing outer ring close to the oil storage cavity is fixedly connected with a guide block and is distributed in a circular shape, and the four corners of the guide block are designed with arc chamfers.

[0015] Preferably, an oil filling channel and an oil discharge channel are respectively provided at the upper and lower ends of the bearing outer ring close to the oil storage cavity, and the outer ends of the oil filling channel and the oil discharge channel are both threadedly connected with a plugging head with a hexagonal groove.

[0016] Preferably, annular tracks are provided at both ends of the bearing outer ring close to the bearing inner ring, and the inner cavity of the annular track is connected to a fan-shaped slide fixedly matched with the bearing inner ring in a triangular equidistant sliding manner.

[0017] Preferably, both ends of the bearing isolation ring close to the bearing inner ring are fixedly connected with limit rings used in conjunction with the inner roller and the outer roller.

[0018] Preferably, a sealing ring is embedded on the rear end cover, a front oil seal is embedded on the front side of the front end cover, and a rear oil seal is embedded on the back side of the rear end cover.

[0019] The high-speed ball bearing for a power motor of the present invention has the following advantages:

[0020] 1. The high-speed ball bearing used for power motors first provides rolling support for the inner and outer rollers by three rows of staggered inner and outer raceways. The three rows of staggered balls are arranged to enhance the overall bite force during the rotation of the high-speed ball bearing. Then, three sets of staggered inner and outer tooth grooves further provide meshing force to the inner and outer teeth on the inner and outer rollers in the rolling state, forcing the inner ring of the bearing and the bearing isolation ring to rotate stably within the outer ring of the bearing to prevent the balls from shifting or falling apart, thereby improving the overall firmness and stability of the high-speed ball bearing, extending the service life of the high-speed ball bearing, reducing the maintenance frequency of the high-speed ball bearing, saving time and effort, and also saving costs.

[0021] 2. The high-speed ball bearing for the power motor first temporarily stores the lubricating oil in the oil storage chamber, and then evenly penetrates the inner and outer rollers in the rolling state through tiny oil seepage holes, and the excess lubricating oil that seeps in is circulated through the inner and outer oil channels for the inner and outer rollers to be used for circulating lubrication, and then the inner flow groove and the outer flow groove further enhance the contact effect between the inner and outer rollers and the lubricating oil, so that the inner and outer rollers are adequately lubricated, the wear of the inner and outer rollers is reduced, and the service life of the high-speed ball bearing is further extended. At the same time, the inner roller drives the spoiler and the dirt suction piece to assist in disturbing the flow of the lubricating oil in the outer oil channel to prevent the lubricating oil from blocking and affecting the normal rolling of the outer roller. At the same time, the oil stains in the lubricating oil in the outer oil channel are adhered and temporarily stored to prevent the outer roller from rolling block caused by excessive oil stains, thereby improving the rolling smoothness of the outer roller.

[0022] 3. The high-speed ball bearing used for the power motor first performs double sealing on the front cover and the rear cover on the outer ring of the bearing by the inner lip and the outer lip on the front oil seal and the rear oil seal respectively, and then elastically tightens the inner lip and the outer lip on the front oil seal and the rear oil seal by two sets of inner spring rings and inner elastic rings as well as outer spring rings and outer elastic rings, thereby improving the compressive strength of the front oil seal and the rear oil seal while preventing the front oil seal and the rear oil seal from being deformed under pressure and causing oil leakage, thereby improving the overall sealing performance of the high-speed ball bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a high-speed ball bearing for a power motor according to the present invention;

[0025] Figure 2 This is a rear view of the high-speed ball bearing structure for a power motor of the present invention;

[0026] Figure 3 This is a cross-sectional view of the high-speed ball bearing structure for a power motor of the present invention;

[0027] Figure 4 This is an exploded side view of a high-speed ball bearing structure for a power motor according to the present invention;

[0028] Figure 5 This is a partial exploded view of the high-speed ball bearing structure for a power motor of the present invention;

[0029] Figure 6 A side cross-sectional view of the bearing outer ring structure of the present invention;

[0030] Figure 7 This is a front view of the bearing isolation ring structure of the present invention;

[0031] Figure 8 This is a front view of the inner roller and outer roller structure of the present invention;

[0032] Figure 9 This is a front view of the inner roller structure of the present invention;

[0033] Figure 10 This is a front view of the outer roller structure of the present invention;

[0034] Figure 11 A bottom sectional view of the sealing assembly structure of the present invention;

[0035] Figure 12 This is an exploded side view of the rear oil seal structure of the present invention.

[0036] Explanation of the marks in the figure: 1. Bearing outer ring; 2. Front end cover; 3. Rear end cover; 4. Bearing inner ring; 5. Bearing isolation ring; 61. Inner raceway; 62. Inner tooth groove; 63. Outer raceway; 64. Outer tooth groove; 65. Inner roller; 66. Inner teeth; 67. Outer roller; 68. Outer teeth; 71. Oil storage chamber; 72. Oil seepage hole; 73. Inner oil channel; 74. Outer oil channel; 75. Inner flow groove; 76. Outer flow groove; 77. Spoiler; 78. Dirt suction piece; 81. Inner lip; 82. Outer lip; 83. Inner spring ring; 84. Outer spring ring; 85. Inner elastic ring; 86. Outer elastic ring; 9. Guide block; 10. Sealing head; 11. Annular track; 12. Fan-shaped slide; 13. Limiting ring; 14. Sealing ring; 15. Front oil seal; 16. Rear oil seal. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0038] like Figures 1-12 As shown, the high-speed ball bearing for a power motor of the present invention comprises a bearing outer ring 1, a front end cover 2 is integrally formed at the front end of the bearing outer ring 1, and a rear end cover 3 is integrally formed at the rear end of the bearing outer ring 1, the inner cavity of the bearing outer ring 1 is sleeved with a bearing inner ring 4, and a bearing isolation ring 5 is provided between the bearing outer ring 1 and the bearing inner ring 4, an annular track 11 is provided at both ends of the bearing outer ring 1 close to the bearing inner ring 4, and the inner cavity of the annular track 11 is connected to a fan-shaped slide 12 fixedly matched with the bearing inner ring 4 in a triangular equidistant sliding manner, so as to ensure the stability of the bearing outer ring 1 and the shaft. The inner ring 4 of the bearing plays the role of rotation support, improving its overall rotation stability. The two ends of the bearing isolation ring 5 close to the inner ring 4 of the bearing are fixedly connected with the limit ring 13 used in conjunction with the inner roller 65 and the outer roller 67. The internal components of the limit ring 13 are protected. A sealing ring 14 is embedded in the rear end cover 3, and a front oil seal 15 is embedded in the front side of the front end cover 2, and a rear oil seal 16 is embedded in the back of the rear end cover 3. Multiple sealing treatments are performed on the front end cover 2, the rear end cover 3 and the entire body to prevent oil leakage due to the torque squeeze of the power motor output shaft;

[0039] A rolling assembly that rotates with the bearing outer ring 1 and the bearing inner ring 4 is provided on the circumference of the bearing isolation ring 5, and three sets of rolling elements are used to provide stable rolling between the bearing outer ring 1, the bearing isolation ring 5 and the bearing inner ring 4. A lubrication assembly that supplies oil lubrication to the rolling assembly is provided between the bearing outer ring 1 and the bearing isolation ring 5; the rolling assembly includes an inner raceway 61 and an outer raceway 63 that are circumferentially opened on the inner side of the bearing outer ring 1 and the bearing isolation ring 5, which provide bite and meshing force for the rolling elements in the high-speed ball bearing, thereby improving the overall firmness of the high-speed ball bearing. and stability, and extend the service life of the high-speed ball bearing, reduce the maintenance frequency of the high-speed ball bearing, save time and effort, and save costs. The lubrication component includes an oil storage cavity 71 annularly opened in the outer ring 1 of the bearing, and an oil seepage hole 72 is opened on one side of the outer ring 1 of the bearing close to the inner raceway 61 and the outer raceway 63 to supply oil to the inner roller 65 and the outer roller 67, so that the inner roller 65 and the outer roller 67 are adequately lubricated, reducing the wear of the inner roller 65 and the outer roller 67, and further extending the service life of the high-speed ball bearing.

[0040] like Figures 5-10 As shown, the rolling assembly also includes an inner tooth groove 62 provided in the inner raceway 61 on the bearing isolation ring 5, and an outer tooth groove 64 in the outer raceway 63, and the inner cavity of the inner raceway 61 is rolling connected with an inner roller 65 and adopts an elliptical ball design, and the inner teeth 66 circumferentially fixed on the inner roller 65 and meshing with the inner tooth groove 62, and the inner cavity of the outer raceway 63 is rolling connected with an outer roller 67 and adopts a spherical ball design, and the inner roller 65 and the outer roller 67 are rolling provided by three rows of inner raceways 61 and outer raceways 63 distributed in an alternating manner. The staggered arrangement of the balls enhances the overall bite force of the high-speed ball bearing during rotation. The outer teeth 68 circumferentially fixed to the outer roller 67 mesh with the outer tooth grooves 64. The three sets of staggered inner tooth grooves 62 and outer tooth grooves 64 further provide meshing force to the inner teeth 66 and outer teeth 68 on the inner roller 65 and outer roller 67 in a rolling state, forcing the bearing inner ring 4 and the bearing spacer 5 to rotate stably within the bearing outer ring 1 to prevent the balls from shifting or falling apart, thereby improving the overall firmness and stability of the high-speed ball bearing.

[0041] The inner raceway 61 and the outer raceway 63 are staggered along the transverse axis of the bearing outer ring 1 and the bearing isolation ring 5, which is conducive to the reasonable distribution of the inner roller 65 and the outer roller 67 and improves their overall bite force. The inner teeth 66 on the inner roller 65 and the outer teeth 68 on the outer roller 67 are rollingly connected with the inner raceway 61 and the outer raceway 63 on the bearing outer ring 1. During the period when the inner teeth 66 on the inner roller 65 and the outer teeth 68 on the outer roller 67 are meshing and rolling in the inner tooth grooves 62 in the inner raceway 61 on the bearing isolation ring 5, the inner raceway 61 and the outer raceway 63 on the bearing outer ring 1 limit the rolling of the inner roller 65 and the outer roller 67 to ensure the rolling stability of the inner roller 65 and the outer roller 67 to avoid unstable displacement.

[0042] The lubrication assembly also includes an inner oil channel 73 and an outer oil channel 74 which are staggeredly arranged on the outer ring 1 of the bearing and the bearing isolation ring 5 near the outer ends of the inner raceway 61 and the outer raceway 63. The lubricating oil is temporarily stored in the oil storage chamber 71, and is evenly infiltrated into the inner roller 65 and the outer roller 67 in the rolling state through the tiny oil seepage holes 72. The excess lubricating oil that has seeped in is flowed by the inner oil channel 73 and the outer oil channel 74 to provide circulating lubrication for the inner roller 65 and the outer roller 67. In addition, an inner flow groove 75 and an outer flow groove 76 are respectively annularly arranged at the center of the inner roller 65 and the outer roller 67 to cooperate with the flow of the inner oil channel 73 and the outer oil channel 74. The inner flow groove 75 and the outer flow groove 76 further enhance the inner roller 65 and the outer roller The contact effect between 67 and the lubricating oil ensures that the inner roller 65 and the outer roller 67 are adequately lubricated, reducing the wear of the inner roller 65 and the outer roller 67, and further extending the service life of the high-speed ball bearing. Both ends of the inner roller 65 are fixedly connected with a spoiler head 77 that cooperates with the spoiler of the outer oil channel 74, and the spoiler head 77 is embedded with a dirt suction piece 78. The inner roller 65 drives the spoiler head 77 and the dirt suction piece 78 to assist the spoiler flow of the lubricating oil in the outer oil channel 74 to prevent the lubricating oil from being blocked and affecting the normal rolling of the outer roller 67. At the same time, the oil stains in the lubricating oil in the outer oil channel 74 are temporarily adhered and stored to prevent the outer roller 67 from rolling obstruction caused by excessive oil stains, thereby improving the rolling smoothness of the outer roller 67.

[0043] The depth of the inner oil channel 73 and the outer oil channel 74 is greater than the depth of the inner raceway 61 and the outer raceway 63, leaving space for the inner roller 65 and the outer roller 67 to roll in the inner raceway 61 and the outer raceway 63, which is beneficial to the temporary storage and flow of lubricating oil, and the inner oil channel 73 and the outer oil channel 74 are also distributed in a circumferential staggered state with the inner tooth groove 62 and the outer tooth groove 64, which is beneficial to the distribution and flow of lubricating oil. The inner cavity of the bearing outer ring 1 near the oil storage chamber 71 is fixedly connected with a guide block 9 and is distributed in a circular shape, and the four corners of the guide block 9 are designed with arc chamfers to guide the lubricating oil in the oil storage chamber 71 so that the lubricating oil quickly fills the oil storage chamber 71. The bearing outer ring 1 is respectively provided with an oil filling channel and an oil drain channel near the upper and lower ends of the oil storage chamber 71, and the outer ends of the oil filling channel and the oil drain channel are threadedly connected to a sealing head 10 with a hexagonal groove, which is convenient for supplying and discharging lubricating oil to the oil storage chamber 71.

[0044] like Figure 11-12 As shown, during the use of the output shaft on the power motor and the high-speed ball bearing, the stress generated by the rotating torque of the output shaft causes the high-speed ball bearing to leak oil, and it does not have an effective double sealing function. The front oil seal 15 and the rear oil seal 16 are both provided with a sealing assembly that seals with the bearing outer ring 1, the bearing inner ring 4 and the bearing isolation ring 5, and the inner ends of the front oil seal 15 and the rear oil seal 16 are respectively integrally formed with an inner lip 81 and an outer lip 82, which respectively perform double sealing on the front cover 2 and the rear cover 3 on the bearing outer ring 1 by the inner lip 81 and the outer lip 82 on the front oil seal 15 and the rear oil seal 16. Sealing, the inner lip 81 is provided with an inner spring ring 83, and the inner spring ring 83 is provided with an inner elastic ring 85, and the outer lip 82 is provided with an outer spring ring 84, and the outer spring ring 84 is provided with an outer elastic ring 86. The two groups of inner spring rings 83 and inner elastic rings 85 and outer spring rings 84 and outer elastic rings 86 elastically tighten the inner lip 81 and outer lip 82 on the front oil seal 15 and the rear oil seal 16, thereby improving the compressive strength of the front oil seal 15 and the rear oil seal 16, and preventing the front oil seal 15 and the rear oil seal 16 from being deformed by pressure and leaking oil, thereby improving the overall sealing performance of the high-speed ball bearing.

[0045] The working principle of the high-speed ball bearing for the power motor is as follows: when the output shaft of the power motor drives the bearing inner ring 4 and the bearing isolation ring 5 on the high-speed ball bearing to rotate, the inner rollers 65 and outer rollers 67 with three rows of circumferentially staggered distribution are forced to roll in the inner raceway 61 and the outer raceway 63 between the bearing outer ring 1 and the bearing isolation ring 5. The reasonable arrangement of the rollers is used to improve the overall bite force of the high-speed ball bearing. Since the bearing outer ring 1 is in a stationary state, the inner rollers 65 and outer rollers 67 in the force rolling state drive the inner teeth 66 and the outer teeth 68 to mesh and roll with the inner tooth grooves 62 and the outer tooth grooves 64 in the inner raceway 61 and the outer raceway 63 on the bearing isolation ring 5, and the inner raceway 61 and the outer raceway 63 on the bearing outer ring 1 perform rolling limit processing on the inner teeth 66 and the outer teeth 68 on the inner roller 65 and the outer roller 67, and the limit ring 13 is used to limit and prevent the inner parts, thereby further improving the overall meshing force of the high-speed ball bearing.

[0046] During this period, the plugging head 10 at the oil filling channel is opened in advance, and the lubricating oil is quantitatively added to the oil storage chamber 71 in the bearing outer ring 1. With the guidance of the guide block 9, the lubricating oil fills the oil storage chamber 71, and then penetrates to the inner roller 65 and the outer roller 67 through the tiny oil seepage holes 72, lubricating the inner roller 65 and the outer roller 67 in the rolling state, and the excess lubricating oil flows into the inner oil channel 73 and the outer oil channel 74 between the bearing outer ring 1 and the bearing isolation ring 5 for temporary storage, and is supplied to the inner roller 65 and the outer roller 67 for multiple circulation. At the same time, the inner roller in the rolling state 65 and the outer roller 67 are in full contact with the lubricating oil through the inner flow groove 75 and the outer flow groove 76 respectively, thereby improving the rolling smoothness of the inner roller 65 and the outer roller 67. At the same time, the inner roller 65 in the rolling state drives the spoiler heads 77 at both ends and the dirt suction pieces 78 thereon to rotate in the outer oil channel 74, thereby diverting the lubricating oil in the outer oil channel 74 to prevent excessive lubricating oil from clogging and affecting the rolling of the outer roller 67. At the same time, the dirt suction piece 78 adheres to the oil stains in the lubricating oil in the outer oil channel 74 to prevent excessive oil stains from affecting the normal flow of the lubricating oil in the outer oil channel 74, thereby improving the overall smoothness of the high-speed ball bearing.

[0047] At the same time, the sealing ring 14 first seals the installation position of the rear end cover 3 and the power motor output shaft, and the inner lip 81 and outer lip 82 on the front oil seal 15 and the rear oil seal 16 respectively perform double sealing on the front end cover 2 and the rear end cover 3. When the front oil seal 15 and the rear oil seal 16 are subjected to the stress generated by the torque of the power motor output shaft, the two groups of inner spring rings 83 and the inner elastic ring 85 elastically tighten the inner lip 81 on the front oil seal 15 and the rear oil seal 16, and the two groups of outer spring rings 84 and the outer elastic ring 86 elastically tighten the outer lip 82 on the front oil seal 15 and the rear oil seal 16 to prevent the inner lip 81 and the outer lip 82 from being affected by the stress and causing deformation and oil leakage, thereby improving the overall sealing performance of the high-speed ball bearing.

[0048] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A high-speed ball bearing for a power motor, comprising a bearing outer ring (1), characterized in that: The front end of the bearing outer ring (1) is integrally formed with a front end cover (2), and the rear end of the bearing outer ring (1) is integrally formed with a rear end cover (3), the inner cavity of the bearing outer ring (1) is sleeved with a bearing inner ring (4), and a bearing isolation ring (5) is provided between the bearing outer ring (1) and the bearing inner ring (4); The upper circumference of the bearing isolation ring (5) is provided with a rolling assembly that rotates with the bearing outer ring (1) and the bearing inner ring (4), and three groups of rolling bodies are used to provide stable rolling between the bearing outer ring (1), the bearing isolation ring (5) and the bearing inner ring (4), and a lubrication assembly is provided between the bearing outer ring (1) and the bearing isolation ring (5) to supply oil lubrication to the rolling assembly; The rolling assembly comprises an inner raceway (61) and an outer raceway (63) circumferentially opened on the inner side of the bearing outer ring (1) and the bearing isolation ring (5), and the lubrication assembly comprises an oil storage cavity (71) annularly opened in the bearing outer ring (1), and an oil seepage hole (72) circumferentially opened on one side of the bearing outer ring (1) close to the inner raceway (61) and the outer raceway (63) for supplying oil to the inner roller (65) and the outer roller (67).

2. The high-speed ball bearing for a power motor according to claim 1, characterized in that: The rolling assembly further comprises an inner tooth groove (62) provided in an inner raceway (61) on the bearing isolation ring (5), and an outer tooth groove (64) in an outer raceway (63), wherein the inner cavity of the inner raceway (61) is rollingly connected to an inner roller (65) and adopts an elliptical ball design, and an inner tooth (66) is circumferentially fixed on the inner roller (65) and meshes with the inner tooth groove (62), the inner cavity of the outer raceway (63) is rollingly connected to an outer roller (67) and adopts a spherical ball design, and an outer tooth (68) is circumferentially fixed on the outer roller (67) and meshes with the outer tooth groove (64).

3. The high-speed ball bearing for a power motor according to claim 2, characterized in that: The lubrication assembly further comprises an inner oil passage (73) and an outer oil passage (74) which are staggeredly arranged on the outer ring (1) of the bearing and the bearing isolation ring (5) near the outer ends of the inner raceway (61) and the outer raceway (63), and an inner flow groove (75) and an outer flow groove (76) which are respectively annularly arranged at the center of the inner roller (65) and the outer roller (67) and which are flow-matched with the inner oil passage (73) and the outer oil passage (74), and both ends of the inner roller (65) are fixedly connected with a flow-disturbing head (77) which is flow-matched with the outer oil passage (74), and a dirt-absorbing sheet (78) is embedded in the flow-disturbing head (77).

4. The high-speed ball bearing for a power motor according to claim 3, characterized in that: The inner raceway (61) and the outer raceway (63) are arranged in a staggered state along the transverse axis of the bearing outer ring (1) and the bearing isolation ring (5), and the inner teeth (66) on the inner roller (65) and the outer teeth (68) on the outer roller (67) are rollingly connected with the inner raceway (61) and the outer raceway (63) on the bearing outer ring (1).

5. The high-speed ball bearing for a power motor according to claim 4, characterized in that: The depths of the inner oil passage (73) and the outer oil passage (74) are greater than the depths of the inner raceway (61) and the outer raceway (63), and the inner oil passage (73) and the outer oil passage (74) are also distributed in a circumferentially staggered state as are the inner tooth groove (62) and the outer tooth groove (64).

6. The high-speed ball bearing for a power motor according to claim 5, characterized in that: The bearing outer ring (1) is fixedly connected to the inner cavity of the oil storage cavity (71) with a guide block (9) and is distributed in a circumferential shape, and the four corners of the guide block (9) are all designed with arc chamfers.

7. The high-speed ball bearing for a power motor according to claim 6, characterized in that: The bearing outer ring (1) is provided with an oil injection channel and an oil discharge channel at the upper and lower ends close to the oil storage cavity (71), and the outer ends of the oil injection channel and the oil discharge channel are both threadedly connected to a plug (10) with a hexagonal groove.

8. The high-speed ball bearing for a power motor according to claim 7, characterized in that: The bearing outer ring (1) is provided with annular tracks (11) at both ends close to the bearing inner ring (4), and the inner cavity of the annular track (11) is connected to a fan-shaped slide (12) fixedly matched with the bearing inner ring (4) in a triangular equidistant sliding manner.

9. The high-speed ball bearing for a power motor according to claim 8, characterized in that: Both ends of the bearing isolation ring (5) close to the bearing inner ring (4) are fixedly connected with a limit ring (13) used in conjunction with the inner roller (65) and the outer roller (67).

10. The high-speed ball bearing for a power motor according to claim 9, characterized in that: A sealing ring (14) is embedded on the rear end cover (3), a front oil seal (15) is embedded on the front side of the front end cover (2), and a rear oil seal (16) is embedded on the back side of the rear end cover (3).

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