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CN-224225139-U - Rack hard limiting and supporting mechanism for four-wheel independent steering

CN224225139UCN 224225139 UCN224225139 UCN 224225139UCN-224225139-U

Abstract

The utility model relates to the technical field of steering systems, in particular to a rack hard limiting and supporting mechanism for four-wheel independent steering. A rack hard limiting and supporting mechanism for four-wheel independent steering comprises a supporting ring and a supporting frame and is characterized in that the supporting frame is sleeved on the outer side of the rack, the supporting frame is of a cylindrical structure, a plurality of annular grooves are formed in the outer edge of the supporting frame, O-shaped rings are embedded in the annular grooves respectively, the supporting ring is sleeved on the outer side of the O-shaped rings, the supporting ring is of an annular structure, and a plurality of weight reduction grooves are formed in one side of the supporting ring. Compared with the prior art, the steering gear has the advantages that under the conditions that the racks are normally meshed and subjected to the action of pull rod forces with different angles, the swing amount in the steering gear shell hole can be controlled to be as small as possible, and meanwhile, in order to ensure the transmission efficiency, a support ring with low friction materials is arranged at the contact position with the steering gear shell to reduce the friction force of the racks sliding in the steering gear shell hole.

Inventors

  • JIANG NAN
  • LUO WEI
  • XU YANGPENG
  • FENG XINGHUI
  • JIANG ZHUO

Assignees

  • 博世华域转向系统有限公司

Dates

Publication Date
20260512
Application Date
20250613

Claims (6)

  1. 1. A rack hard limiting and supporting mechanism for four-wheel independent steering comprises a supporting ring and a supporting frame and is characterized in that the supporting frame (5) is sleeved on the outer side of a rack (4), the supporting frame (5) is of a cylindrical structure, a plurality of annular grooves (5-1) are formed in the outer edge of the supporting frame (5), O-shaped rings (3) are embedded in the annular grooves (5-1) respectively, a supporting ring (2) is sleeved on the outer side of the O-shaped rings (3), the supporting ring (2) is of an annular structure, and a plurality of weight reduction grooves (2-1) are formed in one side of the supporting ring (2).
  2. 2. The rack hard limit and support mechanism for four-wheel independent steering as claimed in claim 1, wherein the support ring (2) is of a circular ring structure, the weight reduction groove (2-1) on the support ring (2) is of an arc-shaped groove structure, and the weight reduction groove (2-1) is positioned on the side end face of the support ring (2).
  3. 3. The rack hard limiting and supporting mechanism for four-wheel independent steering according to claim 1 or 2 is characterized in that at least 4 weight reducing grooves (2-1) are formed, and the 4 weight reducing grooves (2-1) are uniformly distributed on the side end face of the supporting ring (2).
  4. 4. The rack hard limit and support mechanism for four-wheel independent steering as set forth in claim 1, wherein the thickness of the middle part of the support frame (5) is greater than the thickness of the left and right sides of the support frame (5).
  5. 5. The rack hard limiting and supporting mechanism for four-wheel independent steering as set forth in claim 1 or 4, wherein the number of ring grooves (5-1) on the supporting frame (5) is at least 2.
  6. 6. The rack hard limiting and supporting mechanism for four-wheel independent steering as set forth in claim 1 or 4, wherein the outer side of the supporting frame (5) is sleeved with a steering gear shell (1), the inner side wall of the steering gear shell (1) is in contact with the outer edge of the supporting ring (2), the inner side wall of the supporting ring (2) is in contact with the outer edge of the O-shaped ring (3), and the O-shaped ring (3) is embedded in the annular groove (5-1) of the supporting frame (5).

Description

Rack hard limiting and supporting mechanism for four-wheel independent steering Technical Field The utility model relates to the technical field of steering systems, in particular to a rack hard limiting and supporting mechanism for four-wheel independent steering. Background In the design of a general four-wheel independent steering gear, in order to realize the requirement of independent driving of left and right wheels, the left and right racks are of a split design, so that the racks are only supported at a single point at the meshing position of the racks in the system, the stability and the noise performance in the gear-rack transmission process are greatly uncertain, and the other end of the rack is not connected with a pull rod any more, and the rack has no hard limiting characteristic. Therefore, a brand new rack supporting mechanism needs to be designed, so that low-friction radial limiting support is provided for the rack, and meanwhile, the axial stroke hard limiting requirement is met. Disclosure of Invention The utility model provides a rack hard limiting and supporting mechanism for four-wheel independent steering, which aims to overcome the defects of the prior art, ensure that the swing amount of a rack in a steering gear shell hole can be controlled in a range as small as possible under the conditions of normal engagement and the action of pull rod forces with different angles, simultaneously design a supporting ring with low friction materials at the contact position with the steering gear shell to reduce the friction force of the rack sliding in the steering gear shell hole, and design an O-shaped ring to provide certain flexibility for the supporting mechanism so as to avoid the jamming risk caused by overlarge impact energy. The rack hard limiting and supporting mechanism for the four-wheel independent steering is characterized in that the rack is sleeved with the supporting frame, the supporting frame is of a cylindrical structure, a plurality of annular grooves are formed in the outer edge of the supporting frame, O-shaped rings are respectively embedded in the annular grooves, the supporting ring is sleeved on the outer side of the O-shaped rings, the supporting ring is of an annular structure, and a plurality of weight reduction grooves are formed in one side of the supporting ring. The support ring is of a circular ring structure, the weight-reducing groove on the support ring is of an arc-shaped groove structure, and the weight-reducing groove is positioned on the side end face of the support ring. The weight-reducing grooves are at least 4, and the 4 weight-reducing grooves are uniformly distributed on the side end face of the support ring. The thickness of the middle part of the support frame is larger than that of the left side and the right side of the support frame. At least 2 ring grooves are arranged on the supporting frame. The outside cover of support frame be equipped with the steering gear casing to the inside wall of steering gear casing contacts with the outer fringe of holding ring, the inside wall of holding ring contacts with the outer fringe of O type circle, O type circle inlays and establishes in the annular of support frame. Compared with the prior art, the utility model provides the rack hard limiting and supporting mechanism for four-wheel independent steering, which ensures that the swing amount of the rack in the steering gear shell hole can be controlled in the smallest possible range under the conditions of normal engagement and the action of pull rod forces with different angles, simultaneously, in order to ensure the transmission efficiency, the supporting ring with low friction materials is designed at the contact position with the steering gear shell to reduce the friction force of the rack sliding in the steering gear shell hole, and in addition, the O-shaped ring is designed to provide certain flexibility for the supporting mechanism, so that the clamping stagnation risk caused by overlarge impact energy is avoided. Drawings Fig. 1 is a cross-sectional view of the structure of the present utility model. Fig. 2 is a schematic view of a support frame structure in the present utility model. FIG. 3 is a schematic view of the structure of the support ring according to the present utility model. FIG. 4 is a schematic view of an O-ring structure according to the present utility model. Fig. 5 is a flow chart of the installation of the inventive structure in a steering gear housing. FIG. 6 is a schematic view of the structure of the present utility model at the end of the steering housing. Detailed Description The utility model is further described below with reference to the accompanying drawings. As shown in fig. 1 to 4, a supporting frame 5 is sleeved on the outer side of the rack 4, the supporting frame 5 is of a cylindrical structure, a plurality of annular grooves 5-1 are formed in the outer edge of the supporting frame 5, O-shaped rings 3 are respect