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CN-224229103-U - Eccentric bearing in steering system

CN224229103UCN 224229103 UCN224229103 UCN 224229103UCN-224229103-U

Abstract

The utility model belongs to the technical field of steering systems, and particularly relates to an eccentric bearing in a steering system; the eccentric bearing comprises an eccentric bearing outer ring, a plurality of rollers, a sealing ring, a locking block and a through groove, wherein the first roller path is arranged on the inner side of the eccentric bearing outer ring, the rollers are assembled in the first roller path of the eccentric bearing outer ring, the rollers are distributed at intervals in the circumferential direction of the first roller path, the sealing ring is arranged in the middle of the eccentric bearing outer ring, the axes of the first roller path and the sealing ring are not overlapped with the axis of the eccentric bearing outer ring, the locking block is arranged in the first roller path and between the two rollers, and the through groove is formed in the locking block. The utility model provides an eccentric bearing in a steering system, which can effectively adjust the clearance of sector gear transmission in the steering system.

Inventors

  • ZHOU XIAOLIN
  • LI HAO

Assignees

  • 杭州驰创轴研科技有限公司

Dates

Publication Date
20260512
Application Date
20250624

Claims (9)

  1. 1. An eccentric bearing in a steering system, comprising: an eccentric bearing outer ring (1), the inner side of which is provided with a first rollaway nest (2); The rollers (3) are assembled in the first rollaway nest (2) of the eccentric bearing outer ring (1), and the rollers (3) are a plurality of and uniformly distributed at intervals along the circumferential direction of the first rollaway nest (2); The sealing ring (4) is arranged in the middle of the eccentric bearing outer ring (1), and the axle center of the first rollaway nest (2) and the sealing ring (4) is not overlapped with the axle center of the eccentric bearing outer ring (1); a locking block (5) which is arranged in the first rollaway nest (2) and is positioned between two rollers (3); The through groove (6) is arranged on the locking block (5).
  2. 2. An eccentric bearing in a steering system according to claim 1, characterized in that the surface of the locking block (5) in contact with the roller (3) is provided with grooves (51), said grooves (51) being adapted to the surface of the roller (3).
  3. 3. The eccentric bearing in the steering system according to claim 1, wherein a barb (7) is arranged at the end face of the eccentric bearing outer ring (1), a first annular groove (8) is arranged between the barb (7) and the eccentric bearing outer ring (1), the diameters of the barb (7) and the first annular groove (8) are smaller than the outer diameter of the eccentric bearing outer ring (1), a second annular groove (9) is arranged at the end face of the eccentric bearing outer ring (1), and the end face of the second annular groove (9) is parallel to the axis of the eccentric bearing outer ring (1).
  4. 4. An eccentric bearing in a steering system according to claim 3, characterized in that the end face of the outer ring (1) of the eccentric bearing is provided with a U-shaped groove (10U) and a countersink (11), and the U-shaped groove (10U) and the countersink (11) penetrate through the barb (7) and the annular groove I (8).
  5. 5. An eccentric bearing in a steering system according to claim 1, characterized in that the eccentric bearing outer ring (1) is internally provided with a mounting groove (41) adapted to the sealing ring (4).
  6. 6. An eccentric bearing in a steering system according to claim 1, characterized in that the outer ring (1) of the eccentric bearing is provided with a second raceway (12) on an end surface remote from the barb (7), and that the second raceway (12) is internally provided with a number of balls (13).
  7. 7. The eccentric bearing in the steering system according to claim 6, wherein a rotating shaft sleeve (14) is arranged in the roller path, the rotating shaft sleeve (14) is in contact with the outer surface of the roller (3), a rotating plate (15) is arranged on the end face of the outer ring (1) of the eccentric bearing, the rotating plate (15) covers the balls (13) on the second roller path (12), the balls (13) are in contact with the surface of the rotating plate (15), the axes of the rotating shaft sleeve (14) and the rotating plate (15) are coincident with the axis of the outer ring (1) of the eccentric bearing, and the rotating shaft sleeve (14) is integrated with the rotating plate (15).
  8. 8. An eccentric bearing in a steering system according to claim 1, characterized in that the outer ring (1) of the eccentric bearing is provided with a plurality of heat dissipation holes (16) in the circumferential direction, which heat dissipation holes (16) extend from the outer surface of the outer ring (1) of the eccentric bearing into the first raceway (2).
  9. 9. An eccentric bearing in a steering system according to claim 8, wherein a rotating shaft (17) is rotatably arranged in the heat dissipation hole (16), a plurality of fins (18) are arranged on the rotating shaft (17), and the fins (18) extend out of the heat dissipation hole (16).

Description

Eccentric bearing in steering system Technical Field The utility model belongs to the technical field of steering systems, and particularly relates to an eccentric bearing in a steering system. Background In the modern automotive industry, steering systems are used as a core component for vehicle handling, directly related to driving safety and driving experience. The circulating ball sector gear transmission has unique performance advantages and is widely applied to an automobile steering system. The steering wheel has the core functions of efficiently converting the rotary motion of the steering wheel into the linear steering force of the wheels, and remarkably reducing the operation load of a driver by means of hydraulic or electric power assistance. For example, in terms of transmission performance, the circulating ball sector gear can realize large torque transmission among staggered shafts, the transmission ratio can reach 16000Nm, the steering precision is greatly improved, and in terms of space utilization, the compact structural design meets the requirement of complex space layout in the automobile. However, this transmission system presents a significant technical pain point. When insufficient mounting contact occurs, two main classes of failure modes are induced. Firstly, partial point contact or line contact is adopted, at the moment, only partial areas of tooth surfaces participate in meshing, so that stress concentration overruns, the hot gluing risk is greatly increased, the stability and the service life of a transmission system are seriously influenced, and secondly, the problem of abnormal side gaps is solved, and in an automatic driving application scene, normal side gaps are uneven due to installation deviation. When the backlash is too small, the rotation torque can be increased sharply, so that the running resistance of the system is increased, and when the backlash is too large, the backlash error can be increased remarkably, so that the steering precision is reduced seriously, and even the severe requirement of automatic driving on the steering precision can not be met. Currently, there are significant limitations to the prior art in industry for controlling contact quality. Taking rigid positioning assembly as an example, the method is highly dependent on high-precision box hole machining, requires zero transmission clearance, has extremely high installation difficulty, and is difficult to realize in actual production. In addition, thermal deformation generated in the working process of the box body can cause the installation standard to drift, and meanwhile, the elastic deformation of the steering shaft during operation cannot be compensated, so that the long-term stable working performance of the steering system is difficult to ensure. Disclosure of utility model The utility model aims to solve the technical problems, and provides an eccentric bearing in a steering system, which can effectively adjust the clearance of sector gear transmission in the steering system. In view of the above, the present utility model provides an eccentric bearing in a steering system, comprising: the inner side of the eccentric bearing outer ring is provided with a first rollaway nest; The rollers are assembled in the first roller path of the eccentric bearing outer ring, are multiple and are uniformly distributed at intervals along the circumferential direction of the first roller path; The sealing ring is arranged in the middle of the outer ring of the eccentric bearing, and the axle center of the first rollaway nest and the axle center of the outer ring of the eccentric bearing are not overlapped with the axle center of the outer ring of the eccentric bearing; The locking block is arranged in the first roller path and positioned between two rollers; the through groove is arranged on the locking block. In the above technical scheme, further, the surface of the locking block, which is contacted with the roller, is provided with a groove, and the groove is matched with the surface of the roller. In any of the above technical schemes, further, a barb is arranged at the end face of the eccentric bearing outer ring, a first annular groove is arranged between the barb and the eccentric bearing outer ring, the diameters of the barb and the first annular groove are smaller than the outer diameter of the eccentric bearing outer ring, a second annular groove is arranged at the end face of the eccentric bearing outer ring, and the end face of the second annular groove is parallel to the axis of the eccentric bearing outer ring. In any of the above technical solutions, further, a U-shaped groove and a countersink are provided on an end face of the outer ring of the eccentric bearing, and the U-shaped groove and the countersink penetrate through the barb and the annular groove. In any of the above technical solutions, further, a mounting groove adapted to the sealing ring is provided inside the outer ring of the