Search

CN-224225137-U - Recirculating ball mechanical steering gear adopting eccentric bevel gear rocker shaft

CN224225137UCN 224225137 UCN224225137 UCN 224225137UCN-224225137-U

Abstract

The application provides a recirculating ball mechanical steering gear adopting an eccentric bevel gear rocker shaft, which comprises a screw nut assembly, a shell, a rocker shaft, needle bearings, steering verticals, side covers, adjusting screws and a retainer, wherein the rocker shaft is arranged in the screw nut assembly, two needle bearings are arranged between the shell and the rocker shaft, the steering verticals are arranged on the left side of the rocker shaft, the side covers are arranged on the right side surface of the shell, the adjusting screws are arranged in the side covers, and the retainer is arranged between the adjusting screws and the rocker shaft. The rocker shaft is pushed to move by the adjusting screw, so that gaps generated by meshing of the sector teeth of the rocker shaft and the tooth surfaces of the screw nut assembly can be accurately eliminated, the gaps of the steering gear transmission pair in the middle and nearby positions are ensured to be extremely small, and the high-speed straight-line running stability of the automobile is improved.

Inventors

  • TIAN SHIAO
  • CHE MINGXIA
  • HUANG KUN
  • ZHAO RUI

Assignees

  • 湖北三环汽车方向机有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (6)

  1. 1. The circulating ball mechanical steering gear adopting the eccentric bevel gear rocker shaft is characterized by comprising a screw nut assembly (1), a shell (2), the rocker shaft (21), a needle bearing (22), a steering vertical arm (23), a side cover (24), adjusting screws (3) and a retainer (31), wherein the rocker shaft (21) is arranged in the screw nut assembly (1), two needle bearings (22) are arranged between the shell (2) and the rocker shaft (21), the steering vertical arm (23) is arranged on the left side of the rocker shaft (21), the side cover (24) is arranged on the right side surface of the shell (2), the adjusting screws (3) are arranged in the side cover (24), and the retainer (31) is arranged between the adjusting screws (3) and the rocker shaft (21).
  2. 2. A recirculating ball mechanical steering gear employing an eccentric tapered rocker shaft according to claim 1, wherein the scallops of the rocker shaft (21) have a five-tooth bevel configuration.
  3. 3. A recirculating ball mechanical steering gear with an eccentric bevel rocker shaft according to claim 2, characterized in that the cutting angle of the tapered thickened sector of the rocker shaft (21) is 6.5 °.
  4. 4. A recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft according to claim 3, wherein the eccentricity of the rocker shaft (21) is 0.1±0.02mm, and the eccentricity angles on both sides of the sector teeth of the rocker shaft (21) are 3 ° to 7 °.
  5. 5. A recirculating ball mechanical steering gear with an eccentric bevel rocker shaft according to claim 4, wherein the retainer (31) is axially secured to the rocker shaft (21) by a clinch attachment mechanism.
  6. 6. The recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft according to claim 5, wherein the rocker shaft (21) is made of 20CrMnTi steel, surface carburized, carburized layer depth is 0.8-1.2 mm, and surface hardness is 58-63 hrc.

Description

Recirculating ball mechanical steering gear adopting eccentric bevel gear rocker shaft Technical Field The utility model relates to the technical field of automobile steering gears, in particular to a circulating ball mechanical steering gear adopting an eccentric bevel gear rocker shaft. Background The motion pair of the circulating ball mechanical steering gear consists of a ball screw pair consisting of a screw and a steering nut, a rocker shaft and a gear rack meshing pair consisting of the steering nut, and the transmission gap of the transmission pair is very small, preferably gapless, when the steering wheel is positioned in the middle and nearby positions. The existing recirculating ball mechanical steering gear cannot quickly adjust the gap of the steering gear, so that the steering wheel is acted by lateral force, and the wheels deviate from the original running position, so that the automobile is unstable. Therefore, we make improvements to this and propose a recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft. Disclosure of Invention The utility model aims to solve the problems that the conventional recirculating ball mechanical steering gear cannot quickly adjust the gap of the steering gear, so that the steering wheel is subjected to the action of lateral force, and the wheel deviates from the original driving position, so that the automobile is unstable. In order to achieve the above object, the present utility model provides the following technical solutions: a recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft to ameliorate the above problems. The application is specifically as follows: The steering vertical arm is arranged on the left side of the rocker arm shaft, the side cover is arranged on the right side surface of the shell, the adjusting screw is arranged in the side cover, and the retainer is arranged between the adjusting screw and the rocker arm shaft. As a preferable implementation mode of the recirculating ball mechanical steering gear adopting the eccentric bevel gear rocker shaft, the sector gear of the rocker shaft has five teeth with a bevel gear structure. As a preferable embodiment of the recirculating ball mechanical steering gear adopting the eccentric bevel gear rocker shaft, the cutting angle of the tapered thickening gear sector of the rocker shaft is 6.5 degrees. As a preferable implementation mode of the recirculating ball mechanical steering gear adopting the eccentric bevel gear rocker shaft, the eccentricity of the rocker shaft is 0.1+/-0.02 mm, and the eccentric angles of the two sides of the rocker shaft sector gear are 3-7 degrees. As a preferred embodiment of the recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft provided by the utility model, the retainer axially secures the rocker shaft by a press-staking connection mechanism. As a preferred implementation mode of the recirculating ball mechanical steering gear adopting the eccentric bevel gear rocker shaft, the rocker shaft is made of 20CrMnTi steel, the surface carburized layer depth is 0.8-1.2 mm, and the surface hardness is 58-63 HRC. Compared with the prior art, the utility model has the beneficial effects that: The rocker shaft is pushed to move by the adjusting screw, so that gaps generated by meshing of the sector teeth of the rocker shaft and the tooth surfaces of the screw nut assembly can be accurately eliminated, the gaps of the steering gear transmission pair in the middle and nearby positions are ensured to be extremely small, and the high-speed straight-line running stability of the automobile is improved. Drawings FIG. 1 is a schematic diagram of a recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft in accordance with the present application; FIG. 2 is a schematic view of the front cross-section of a housing of the recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft in accordance with the present application; FIG. 3 is an enlarged schematic view of the construction of an A recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft in accordance with the present application; FIG. 4 is a schematic view of a rocker shaft of a recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft in accordance with the present application; Fig. 5 is a schematic diagram of the structure of an eccentric sector of a recirculating ball mechanical steering gear employing an eccentric bevel rocker shaft in accordance with the present application. The figures indicate: 1. Screw nut assembly, 2, shell, 21, rocker shaft, 22, needle bearing, 23, steering vertical arm, 24, side cover, 3, adjusting screw, 31 and retainer. Detailed Description In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the e