High-rotating-speed low-noise needle bearing for new energy automobile

Abstract

The invention discloses a high-rotating-speed and low-noise needle bearing for a new energy automobile, and relates to the technical field of bearing noise reduction, the high-rotating-speed and low-noise needle bearing for the new energy automobile comprises a stop ring, the stop ring is connected with one side of a thrust retainer, the other side of the thrust retainer is connected with a bearing outer ring, and the bearing outer ring is connected with the thrust retainer. A bearing inner ring is mounted on the inner sides of the stop ring and the bearing outer ring, a bearing retainer is mounted between the bearing outer ring and the bearing inner ring, and a sealing cover ring is mounted on the outer sides of the stop ring and the bearing outer ring; the first labyrinth seal and the second labyrinth seal which are arranged in gaps generated by connection of the two ends of the bearing can seal the bearing in the rotating process, external dust and other impurities are prevented from entering the bearing to cause abrasion of the roller pin, and then the situation that the roller pin loosens to generate large noise is avoided; and the stop ring and the thrust retainer can bear larger axial force, so that the good stability of the bearing during high-speed rotation is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing noise reduction, and particularly relates to a high-rotation-speed and low-noise needle bearing for a new energy vehicle. BACKGROUND

[0002] With the rapid development of the new energy vehicle industry, high requirements are put forward for the performance of core components such as driving motors and reducers. As the basic supporting elements of these core transmission systems, the performance of bearings is directly related to the efficiency, noise and reliability of the assembly. The driving motor of a new energy vehicle usually has the characteristics of high rotation speed and low vibration noise. The noise control and durability of traditional needle bearings are often difficult to meet the stringent standards of the new generation of electric drive systems under long-term high-speed operation conditions.

[0003] There are many factors that cause abnormal noise of bearings during high-speed operation, among which, the invasion of external pollutants is a crucial but often neglected reason. During vehicle operation, especially in complex road conditions and harsh environments, dust, water vapor, metal debris and other small particulate matters can easily penetrate the sealing gap of the bearing and invade the internal lubricating grease and raceway area. These invaders can cause multiple hazards: first, hard particles between the needle and the raceway can cause abrasive wear, damaging the smooth surface that has been precisely ground, forming scratches and pits. This not only increases the friction torque and reduces the transmission efficiency, but more importantly, at high speed, the periodic rolling of the needle over these damaged points will produce significant vibration and periodic impact noise; second, pollutants can contaminate and degrade the lubricating grease, reducing its lubricating performance and exacerbating dry friction, further leading to an increase in noise decibel value and abnormal bearing temperature rise.

[0004] At present, the conventional needle bearings on the market mostly adopt contact type lip seal or non-contact type gap seal structure. The former has a certain dustproof effect, but the friction torque generated by the contact between the lip and the ring is large, which is not conducive to reducing the power loss at high speed, and the lip is easy to wear, and the long-term sealing reliability decreases; the latter has small friction, but the dustproof effect is limited, and it is difficult to effectively block the invasion of fine dust. Therefore, there is an urgent need in the art for a new energy vehicle high-rotation-speed needle bearing capable of reducing dust wear on the needle through a sealing structure. SUMMARY

[0005] The present application aims to provide a high-rotation-speed and low-noise needle bearing for a new energy vehicle to solve the problems in the prior art.

[0006] In order to achieve the above object, the application provides the following technical scheme: the high-rotation and low-noise needle bearing for new energy vehicles comprises a stop ring, one side of the stop ring is connected with a thrust retainer, the other side of the thrust retainer is connected with a bearing outer ring, a bearing inner ring is installed on the inner side of the stop ring and the bearing outer ring, a bearing retainer is installed between the bearing outer ring and the bearing inner ring, and a sealing cover ring is installed on the outer side of the stop ring and the bearing outer ring.

[0007] As a preferred technical scheme, a mounting groove is formed at the outermost end of the stop ring, a plurality of screw holes are formed on the bottom surface of the mounting groove, a first needle groove is formed on the other end surface of the stop ring, a plurality of first sealing grooves are sequentially formed on the inner wall of the stop ring, the first sealing grooves are sequentially an outermost sealing groove, an intermediate sealing groove and an innermost sealing groove from outside to inside, the groove depth of the first sealing grooves sequentially increases from outside to inside, and the groove width of the first sealing grooves sequentially decreases from outside to inside.

[0008] As a preferred technical scheme, a plurality of first open grooves are uniformly arranged on the thrust retainer, a first needle is embedded in each of the first open grooves, a first inclined opening is arranged on one side of the first open groove, and a curved surface recessed inward is arranged on the side wall of the first open groove.

[0009] As a preferred technical scheme, a shaft shoulder is arranged at one end of the bearing outer ring, a second needle groove is formed on the end surface of the shaft shoulder, a containing groove is formed on the inner wall of the bearing outer ring, a third needle groove is formed on the side wall of the containing groove, a second sealing groove is formed on the other end surface of the bearing outer ring, the second sealing groove is sequentially an outermost layer sealing groove, an intermediate layer sealing groove and an innermost layer sealing groove from outside to inside, the groove depth of the second sealing groove sequentially increases from the outermost layer to the innermost layer, and the groove width of the second sealing groove sequentially decreases from the outermost layer to the innermost layer.

[0010] As a preferred technical scheme, a fourth needle groove is formed on the outer wall of the bearing inner ring, a first sealing tooth is arranged on the outer wall of one end of the bearing inner ring, the first sealing tooth comprises an outermost sealing tooth, an intermediate sealing tooth and an innermost sealing tooth, the tooth height of the first sealing tooth gradually increases from the outermost side to the innermost side, the tooth width of the first sealing tooth is uniform, the tooth spacing of the first sealing tooth sequentially decreases from the outermost side to the innermost side, a dust storage groove is formed in the middle of the top of the first sealing tooth, a plurality of rotational flow grooves are uniformly formed on the first sealing tooth, and a dust storage groove is also formed in the rotational flow groove; The other end of the bearing inner ring is provided with a baffle, one side of the baffle close to the fourth needle groove is provided with a second sealing tooth, the second sealing tooth comprises an outermost sealing tooth, an intermediate layer sealing tooth and an innermost sealing tooth, the tooth height of the second sealing tooth gradually increases from the outermost to the innermost, the tooth width of the second sealing tooth is uniform, and the tooth spacing of the second sealing tooth gradually decreases from the outermost to the innermost, a dust storage groove is formed in the middle of the second sealing tooth, and a plurality of rotational flow grooves are uniformly formed in the second sealing tooth.

[0011] As a preferred technical solution, a plurality of second open grooves are uniformly arranged on the bearing retainer, and a second needle is embedded in each second open groove, and a second bevel is arranged on one side of the second open groove.

[0012] As a preferred technical solution, an oil inlet is formed in the side wall of the sealing cover ring, the oil inlet is sealed by rubber, a plurality of mounting holes are uniformly formed in one end of the sealing cover ring, a sealing ring is arranged at the bottom of each mounting hole, and a screw rod is arranged in each mounting hole.

[0013] As a preferred technical solution, the first sealing tooth of the bearing inner ring is embedded in the first sealing groove of the inner wall of the stop ring to form a first labyrinth seal, the gap formed when the first sealing tooth is embedded in the first sealing groove is a first labyrinth gap, and the width of the first labyrinth gap gradually decreases from the outermost side to the innermost side.

[0014] As a preferred technical solution, the second sealing tooth of the bearing inner ring is embedded in the second sealing groove of the end face of the bearing outer ring to form a second labyrinth seal, the gap formed when the second sealing tooth is embedded in the second sealing groove is a second labyrinth gap, and the width of the second labyrinth gap gradually decreases from the outermost layer to the innermost layer.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. The first labyrinth seal and the second labyrinth seal arranged in the gap generated by the connection of the two ends of the bearing can seal the bearing during rotation, prevent foreign matter such as dust from entering the inside of the bearing and causing wear of the needle, thereby avoiding the generation of large noise due to the loosening of the needle, and the stop ring and the thrust retainer can withstand a large axial force, ensuring good stability of the bearing during high-speed rotation. 2. The dust storage groove arranged at the top of the sealing tooth can store dust entering the labyrinth seal structure, avoid the dust remaining in the labyrinth gap, and prevent the dust from contacting the inner wall of the rotating labyrinth for a long time, thereby preventing the wear of the labyrinth. The dust storage groove can ensure a long service life of the labyrinth seal structure. 3. The rotational flow grooves arranged on the sealing tooth surface make the surface uneven, which can greatly reduce the circulation speed of the sealing structure, slightly increase the leakage amount, and greatly improve the stability of the bearing during high-speed rotation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the main body of the present invention; Figure 3 This is a schematic diagram of the thrust cage structure of the present invention; Figure 4 This is a schematic diagram of the bearing cage structure of the present invention; Figure 5 This is a cross-sectional view of the main body of the invention from another angle; Figure 6 yes Figure 2 Enlarged structural diagram at point A; Figure 7 yes Figure 2 Enlarged structural diagram at point B; Figure 8 yes Figure 5 Enlarged structural diagram at point C; Figure 9 yes Figure 5 A magnified structural diagram at point D.

[0017] In the diagram: 1. Stop ring; 2. Thrust cage; 3. Bearing outer ring; 4. Bearing inner ring; 5. Bearing cage; 6. Sealing cap ring; 7. First labyrinth seal; 8. Second labyrinth seal; 11. Mounting groove; 12. First needle roller groove; 13. First sealing groove; 21. First opening groove; 22. First needle roller; 31. Shoulder; 32. Receiving groove; 33. Second sealing groove; 41. Fourth needle roller groove; 42. First sealing tooth; 43. Ash storage groove; 44. Swirl groove; 45. Baffle; 46. Second sealing tooth; 51. Second opening groove; 52. Second needle roller; 61. Sealing cover ring; 62. Mounting hole; 63. Sealing ring; 64. Screw; 71. First sealing gap; 81. Second sealing gap; 1101, Screw hole; 1301, Outermost sealing groove; 1302, Middle sealing groove; 1303, Innermost sealing groove; 2101, First bevel; 2102, Curved surface; 3101, Second needle roller groove; 3201, Third needle roller groove; 3301, Outermost sealing groove; 3302, Middle sealing groove; 3303, Innermost sealing groove; 4201, Outermost sealing tooth; 4202, Middle sealing tooth; 4203, Innermost sealing tooth; 4601, Outermost sealing tooth; 4602, Middle sealing tooth; 4603, Innermost sealing tooth; 5101, Second bevel. Detailed Implementation

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

[0019] Example: Figures 1-9 As shown, this invention provides a technical solution for a high-speed, low-noise needle roller bearing for new energy vehicles. This high-speed, low-noise needle roller bearing for new energy vehicles includes a retaining ring 1, which is connected to one side of a thrust cage 2. The other side of the thrust cage 2 is connected to a bearing outer ring 3. A bearing inner ring 4 is installed inside the retaining ring 1 and the bearing outer ring 3. A bearing cage 5 is installed between the bearing outer ring 3 and the bearing inner ring 4. A sealing cap ring 6 is installed outside the retaining ring 1 and the bearing outer ring 3. After the bearing is installed, since the thrust cage 2 and the bearing cage 5 have fixed the bearing inner ring 4, when the first sealing teeth 42 are sequentially embedded into the first sealing groove 13, a gap is formed between them, which is a first labyrinth gap 71. Due to the special design of the first sealing groove 13 and the first sealing teeth 42, the width of the first labyrinth gap 71 gradually decreases from the outside to the inside, while the height of the first labyrinth gap gradually decreases. The height gradually increases, so air carrying dust from the outside becomes increasingly difficult to pass through as it goes deeper into the maze. Eventually, most of the dust is collected in the dust storage tank 43, preventing dust from being in prolonged contact with the maze sidewalls during high-speed rotation, which would lead to accelerated wear of the maze structure and affect its service life. On the other hand, the high-speed rotation of the first maze seal 7 generates heat, so the air pressure inside the first maze seal 7 will be slightly higher than the outside air pressure. Under normal circumstances, it will be more difficult for outside air to enter the first maze gap 71 through the gap. In addition, due to the air pressure difference inside and outside the first maze gap 71, some of the dust trapped inside the first maze gap 71 will be blown out, playing a certain cleaning role. In summary, by setting up a maze sealing structure, most of the dust can be blocked, thereby preventing dust or metal debris from entering the bearing and causing impact noise and wear.

[0020] The outermost edge of one end of the stop ring 1 is provided with a mounting groove 11, and the bottom surface of the mounting groove 11 is provided with a plurality of screw holes 1101. The other end face of the stop ring 1 is provided with a first needle roller groove 12. The inner wall of the stop ring 1 is provided with a plurality of first sealing grooves 13 in sequence. The first sealing grooves 13 are, from the outside to the inside, the outermost sealing groove 1301, the middle sealing groove 1302 and the innermost sealing groove 1303. The groove depth of the first sealing groove 13 increases from the outside to the inside, and the groove width of the first sealing groove 13 decreases from the outside to the inside.

[0021] The thrust retainer 2 is uniformly provided with a plurality of first open grooves 21, and the first open grooves 21 are embedded with first needle rollers 22. The first open grooves 21 are provided with first inclined openings 2101 on one side, and the side walls of the first open grooves 21 are provided with inwardly recessed curved surfaces 2102. The first inclined openings 2101 can facilitate the placement of the first needle rollers 22 into the first open grooves 21. The curved surfaces 2102 have the same curvature as the surface of the first needle rollers 22. After the first needle rollers 22 are placed into the first open grooves 21, the curved surfaces 2102 tightly fit the first needle rollers 22 to fix the first needle rollers 22 and prevent the first needle rollers 22 from loosening and generating impact noise during high-speed rotation.

[0022] The bearing outer ring 3 is provided with a shaft shoulder 31 at one end, and the shaft shoulder 31 is provided with a second needle roller groove 3101 on the end face. The inner wall of the bearing outer ring 3 is provided with a containing groove 32, and the side wall of the containing groove 32 is provided with a third needle roller groove 3201. The other end face of the bearing outer ring 3 is provided with a second sealing groove 33. The second sealing groove 33 is divided into an outermost sealing groove 3301, an intermediate sealing groove 3302, and an innermost sealing groove 3303 from outside to inside. The groove depth of the second sealing groove 33 gradually increases from the outermost to the innermost. The groove width of the second sealing groove 33 gradually decreases from the outermost to the innermost.

[0023] The bearing inner ring 4 is provided with a fourth needle roller groove 41 on the outer wall. The outer wall of one end of the bearing inner ring 4 is provided with a first sealing tooth 42. The first sealing tooth 42 includes an outermost sealing tooth 4201, an intermediate sealing tooth 4202, and an innermost sealing tooth 4203. The tooth height of the first sealing tooth 42 gradually increases from the outermost to the innermost. The tooth width of the first sealing tooth 42 is uniform. The tooth spacing of the first sealing tooth 42 gradually decreases from the outermost to the innermost. The intermediate of the top of the first sealing tooth 42 is provided with a dust storage groove 43. A plurality of rotational flow grooves 44 are uniformly provided on the first sealing tooth 42, and the rotational flow grooves 44 are also provided with dust storage grooves 43. The other end of the bearing inner ring 4 is provided with a baffle 45. The baffle 45 is provided with a second sealing tooth 46 on the side close to the fourth needle roller groove 41. The second sealing tooth 46 includes an outermost sealing tooth 4601, an intermediate sealing tooth 4602, and an innermost sealing tooth 4603. The tooth height of the second sealing tooth 46 gradually increases from the outermost to the innermost. The tooth width of the second sealing tooth 46 is uniform. The tooth spacing of the second sealing tooth 46 gradually decreases from the outermost to the innermost. The intermediate of the top of the second sealing tooth 46 is provided with a dust storage groove 43. A plurality of rotational flow grooves 44 are uniformly provided on the second sealing tooth 46.

[0024] The bearing retainer 5 is uniformly provided with a plurality of second open grooves 51, and the second open grooves 51 are embedded with second needle rollers 52. The second open grooves 51 are provided with second inclined openings 5101 on one side.

[0025] The sealing cover ring 6 is provided with an oil inlet 61 in the side wall, the oil inlet 61 is sealed by rubber, the sealing cover ring 6 is uniformly provided with a plurality of mounting holes 62 at one end, the bottom of the mounting hole 62 is provided with a sealing ring 63, and the mounting hole 62 is loaded with a screw rod 64.

[0026] The first sealing groove 13 in the inner wall of the stop ring 1 is embedded with the first sealing teeth 42 of the outer wall of the bearing inner ring 4 to form the first labyrinth seal 7, the gap formed when the first sealing teeth 42 are embedded in the first sealing groove 13 is the first labyrinth gap 71, and the width of the first sealing gap 71 gradually decreases from the outermost side to the innermost side.

[0027] The second sealing groove 33 of the end face of the bearing outer ring 3 is embedded with the second sealing teeth 46 of the bearing inner ring 4 to form the second labyrinth seal 8, the gap formed when the second sealing teeth 46 are embedded in the second sealing groove 33 is the second labyrinth gap 81, and the width of the second labyrinth gap 81 gradually decreases from the outermost layer to the innermost layer.

[0028] The working principle of the application is as follows: After the bearing is installed, since the thrust retainer 2 and the bearing retainer 5 have fixed the bearing inner ring 4, when the first sealing teeth 42 are sequentially embedded in the first sealing groove 13, a gap is formed between them, which is the first labyrinth gap 71, and due to the special arrangement of the first sealing groove 13 and the first sealing teeth 42, the width of the first labyrinth gap 71 gradually decreases from the outside to the inside, and the height of the first labyrinth gap gradually increases, so that the air carrying dust from the outside is more difficult to pass through as it penetrates deeper into the labyrinth, and most of the dust is eventually collected in the dust storage groove 43, avoiding the prolonged contact between the dust and the labyrinth side wall during high-speed rotation of the labyrinth, which can cause the labyrinth structure to wear out and affect the service life. On the other hand, heat is generated during high-speed rotation of the first labyrinth seal 7, so the air pressure in the first labyrinth seal 7 is slightly higher than the outside air pressure, making it more difficult for outside air to enter the first labyrinth gap 71 through the gap under normal circumstances. In addition, due to the pressure difference between the inside and outside of the first labyrinth gap 71, some of the dust trapped in the first labyrinth gap 71 will be blown out, providing a certain cleaning effect.

[0029] The first labyrinth seal 7 and the second labyrinth seal 8 formed by the gap between the two ends of the bearing can seal the bearing during rotation, preventing foreign matter such as dust from entering the bearing and causing wear of the needle roller, thereby preventing the needle roller from loosening and producing loud noise. The stop ring 1 and the thrust retainer 2 can withstand a large axial force, ensuring good stability of the bearing during high-speed rotation.

[0030] The top of the sealing tooth is provided with a dust storage groove 43, which can store dust entering the labyrinth sealing structure from the outside, so as to avoid that the dust stays in the labyrinth gap for a long time, and the dust is in contact with the inner wall of the rotating labyrinth for a long time, which can aggravate the wear of the labyrinth sealing structure. Through the dust storage groove 43, the labyrinth sealing structure can ensure a longer service life.

[0031] The spiral flow groove 44 is arranged to make the surface of the sealing tooth uneven, which can greatly reduce the circulating speed of the labyrinth sealing structure, and slightly improve the leakage while greatly improving the stability of the high-speed rotation of the bearing.

[0032] It is apparent for a person skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A high-rotating-speed and low-noise needle bearing for a new energy vehicle, characterized in that: The high-rotation and low-noise needle bearing for new energy vehicles comprises a stop ring (1), one side of the stop ring (1) is connected with a thrust retainer (2), the other side of the thrust retainer (2) is connected with a bearing outer ring (3), the stop ring (1) and the bearing outer ring (3) are internally provided with a bearing inner ring (4), a bearing retainer (5) is arranged between the bearing outer ring (3) and the bearing inner ring (4), and a sealing cover ring (6) is arranged on the outer side of the stop ring (1) and the bearing outer ring (3). ​ 2. The high-rotating-speed and low-noise needle bearing for a new energy vehicle according to claim 1, characterized in that: An installation groove (11) is formed at the outermost end of the stop ring (1), a plurality of screw holes (1101) are formed in the bottom surface of the installation groove (11), a first needle groove (12) is formed on the other side of the stop ring (1), a plurality of first sealing grooves (13) are sequentially formed in the inner wall of the stop ring (1), the first sealing grooves (13) are sequentially an outermost sealing groove (1301), an intermediate sealing groove (1302) and an innermost sealing groove (1303) from outside to inside, the groove depth of the first sealing grooves (13) gradually increases from outside to inside, and the groove width of the first sealing grooves (13) gradually decreases from outside to inside.

3. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 2, characterized in that: A plurality of first open grooves (21) are uniformly arranged on the thrust retainer (2), a first needle (22) is embedded in each of the first open grooves (21), a first inclined opening (2101) is arranged on one side of the first open groove (21), and a curved surface (2102) recessed inward is arranged on the side wall of the first open groove (21).

4. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 3, characterized in that: An axle shoulder (31) is arranged at one end of the bearing outer ring (3), a second needle groove (3101) is formed on the end surface of the axle shoulder (31), a containing groove (32) is formed in the inner wall of the bearing outer ring (3), a third needle groove (3201) is formed in the side wall of the containing groove (32), a second sealing groove (33) is formed on the other end surface of the bearing outer ring (3), the second sealing groove (33) is sequentially an outermost sealing groove (3301), an intermediate sealing groove (3302) and an innermost sealing groove (3303) from outside to inside, the groove depth of the second sealing groove (33) gradually increases from the outermost layer to the innermost layer, and the groove width of the second sealing groove (33) gradually decreases from the outermost layer to the innermost layer.

5. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 4, characterized in that: A fourth needle groove (41) is formed in the outer wall of the bearing inner ring (4), a first sealing tooth (42) is arranged on the outer wall of one end of the bearing inner ring (4), the first sealing tooth (42) comprises an outermost sealing tooth (4201), an intermediate sealing tooth (4202) and an innermost sealing tooth (4203), the tooth height of the first sealing tooth (42) gradually increases from the outermost side to the innermost side, the tooth width of the first sealing tooth (42) is uniform, the tooth spacing of the first sealing tooth (42) gradually decreases from the outermost side to the innermost side, a dust storage groove (43) is formed in the middle of the top of the first sealing tooth (42), a plurality of rotational flow grooves (44) are uniformly formed on the first sealing tooth (42), and a dust storage groove (43) is also formed in each of the rotational flow grooves (44). The other end of the bearing inner ring (4) is provided with a baffle (45), and a second sealing tooth (46) is arranged on one side of the baffle (45) close to the fourth needle groove (41). The second sealing tooth (46) comprises an outermost sealing tooth (4601), an intermediate layer sealing tooth (4602) and an innermost sealing tooth (4603). The tooth height of the second sealing tooth (46) gradually increases from the outermost to the innermost. The tooth width of the second sealing tooth (46) is uniform. The tooth spacing of the second sealing tooth (46) gradually decreases from the outermost to the innermost. A dust storage groove (43) is arranged above the second sealing tooth (46). A plurality of rotational flow grooves (44) are uniformly arranged on the second sealing tooth (46).

6. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 5, characterized in that: A plurality of second open grooves (51) are uniformly arranged on the bearing retainer (5). Second needles (52) are embedded in the second open grooves (51). A second bevel (5101) is arranged on one side of the second open groove (51).

7. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 6, characterized in that: An oil inlet (61) is arranged on the side wall of the sealing cover ring (6). The oil inlet (61) is sealed by rubber. A plurality of mounting holes (62) are uniformly arranged on one end of the sealing cover ring (6). A sealing ring (63) is arranged at the bottom of the mounting hole (62). A screw rod (64) is arranged in the mounting hole (62).

8. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 7, characterized in that: The first sealing groove (13) in the inner wall of the stop ring (1) is embedded with the first sealing tooth (42) of the outer wall of the bearing inner ring (4) to form a first labyrinth seal (7). The gap formed when the first sealing tooth (42) is embedded in the first sealing groove (13) is a first labyrinth gap (71). The width of the first sealing gap (71) gradually decreases from the outermost to the innermost.

9. The high-rotating-speed and low-noise needle bearing for new energy vehicles according to claim 8, characterized in that: The second sealing groove (33) of the end face of the bearing outer ring (3) is embedded with the second sealing tooth (46) of the bearing inner ring (4) to form a second labyrinth seal (8). The gap formed when the second sealing tooth (46) is embedded in the second sealing groove (33) is a second labyrinth gap (81). The width of the second labyrinth gap (81) gradually decreases from the outermost to the innermost.

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