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KR-102962222-B1 - Independent Steering System

KR102962222B1KR 102962222 B1KR102962222 B1KR 102962222B1KR-102962222-B1

Abstract

The present invention relates to an independent steering system, and more preferably, as an embodiment of the present invention, the independent steering system comprises a knuckle connected to the inner side of a wheel and driven integrally with the wheel, an upper arm connected to the upper end of the knuckle, a lower arm connected to the lower end of the knuckle, a steering motor located on the lower arm, and a steering gear unit having one end connected to the steering motor and rotating integrally with the knuckle according to the rotational force of the steering motor.

Inventors

  • 장세현
  • 황상우
  • 김민준
  • 손영일

Assignees

  • 현대자동차주식회사
  • 기아 주식회사

Dates

Publication Date
20260507
Application Date
20210812

Claims (8)

  1. A knuckle fastened to the inner side of the wheel and driven integrally with the wheel; An upper arm connected to the top of the above knuckle; A lower arm connected to the lower end of the above knuckle; A steering motor located on the lower arm; and A steering gear unit comprising one end connected to the steering motor and rotating integrally with the knuckle according to the rotational force of the steering motor; The above steering gear unit is an independent steering system in which one end facing the steering motor is configured in a semicircular shape.
  2. In Article 1, A push rod connected to a lower arm at one end; and An independent steering system further comprising: a crank connected to the other end of the push rod and the upper arm, and operating integrally with the shock absorber.
  3. In Article 1, An independent steering system further comprising a fastening unit located between the upper end of the lower arm and the knuckle.
  4. In Paragraph 3, The above-mentioned fastening unit is, An independent steering system connected to one end of the steering gear unit and configured to have a vertical rotation axis based on the lower arm.
  5. In Paragraph 3, The above-mentioned fastening unit is, A universal joint fastening portion located on the above knuckle; and An independent steering system comprising: a universal joint rotating part located on the lower arm and fixed to the steering gear part, and configured to have a vertical rotation axis with respect to the lower arm.
  6. In Paragraph 5, The above universal joint connecting part is configured to rotate by a predetermined angle in the width direction of the vehicle relative to the above universal joint rotating part, in an independent steering system.
  7. delete
  8. In Article 1, An independent steering system further comprising a bearing located between the steering gear unit and the lower arm.

Description

Independent Steering System The present invention relates to an independent steering system, and more preferably, to an independent steering system configured to perform independent steering of each wheel, wherein the steering angle is improved by engaging a steering motor and a steering gear unit. Conventional vehicle suspension systems connect the axle and the vehicle body to prevent vibrations or shocks received by the axle from the road surface from being directly transmitted to the vehicle body while the vehicle is in motion, thereby preventing damage to the vehicle body or cargo and improving ride comfort. Such suspension systems are equipped with suspension springs that mitigate shocks received from the road surface, shock absorbers that suppress free vibrations of the suspension springs to improve ride comfort, and stabilizers that suppress rolling of the vehicle. Commercial vehicles primarily use monoaxial suspension systems in which the left and right wheels are connected by a single axle, and leaf springs or air springs are mainly used as suspension springs. Meanwhile, the steering system of a commercial vehicle using a monoaxial suspension consists of a pitman arm mounted on the output shaft of the steering gear and rotating, a drag link that transmits the motion of the pitman arm to the knuckle arm, a knuckle arm that operates the knuckle spindle by receiving the motion of the drag link, and a tie rod connecting the left and right knuckle arms. As disclosed in FIG. 1, a suspension system is illustrated in which one end of a shock absorber is fixed to a vehicle body frame. In a vehicle equipped with an integral axle suspension and steering system using air springs as described above, the air springs merely serve to replace leaf springs and do not significantly contribute to improving ride comfort and handling characteristics, and due to structural characteristics, it is difficult to secure design freedom to implement precise geometry. Furthermore, recently, independent steering suspension systems are being developed that perform steering angle input of the wheel through a motor assembly in each suspension system. However, in the case of such independent steering suspension systems, there was a problem in stably transmitting the rotational force applied from the steering motor to the knuckle and the wheel. Figure 1 illustrates the connection relationship of a rebonuckle as a prior art. FIG. 2 illustrates a perspective view of an independent steering system as an embodiment of the present invention. FIG. 3 illustrates an enlarged view of an independent steering system as an embodiment of the present invention. FIG. 4 illustrates a side view of an independent steering system as an embodiment of the present invention. FIG. 5a illustrates a top view of an independent steering system in a state where the steering angle is 0 degrees, as an embodiment of the present invention. FIG. 5b illustrates a top view of an independent steering system with a steering angle of 90 degrees to the left as an embodiment of the present invention. FIG. 5c illustrates a top view of an independent steering system with the steering angle turned 90 degrees to the right as an embodiment of the present invention. FIG. 6a illustrates the structure of a wheel during a bump as an embodiment of the present invention. FIG. 6b illustrates the structure of a wheel during rebound as an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments below. These embodiments are provided to more completely explain the present invention to those with average knowledge in the art. Additionally, terms such as "...knuckle," "...unit," and "...part" described in the specification refer to a unit that processes at least one function or operation, and this may be implemented as hardware or a combination of hardware. Hereinafter, embodiments will be described in detail with reference to the attached drawings. In describing with reference to the attached drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. The present invention relates to an independent steering system, and more specifically to a steering system capable of steering a knuckle (100) through the rotational force of a steering gear unit (500) located adjacent to a lower arm (300). More preferably, the steering motor (400) and the steering gear unit (500) can be connected through a rack and pinion coupling. Furthermore, the independent steering system of the present invention is applicable to each steering system including a wheel, and as an embodiment of the present invention, a steering system including a single wheel will be des