CN-121990034-A - Suspension structure

Abstract

The present invention can provide a suspension structure capable of improving steering feeling. In the suspension structure according to the present invention, the steering gear box is fastened to a boss provided to the suspension member and having a screw hole for fastening the steering gear box, wherein the diameter of the boss is larger on the side where the steering gear box is fastened than on the front side of the vehicle body.

Inventors

• Ze Tengren

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260508

Application Date

20251030

Priority Date

20241106

Claims (3)

1. 1. A suspension structure is characterized in that, A steering gear box is fastened to a hollow boss provided on a suspension member, The diameter of the outer periphery of the boss is larger on the side where the steering gear box is fastened than on the front side of the vehicle body.
2. 2. The suspension structure according to claim 1, wherein, An opening is provided near the boss of the suspension member.
3. 3. Suspension structure according to claim 1 or 2, characterized in that, The diameter of the outer periphery of the boss becomes smaller from the side where the steering gear box is fastened to the vehicle body front side.

Description

Suspension structure Technical Field The present invention relates to a suspension structure. Background Patent document 1 discloses a suspension device for an automobile, which improves steering responsiveness by adjusting the hardness of a bushing in a multi-link suspension structure. Patent document 1 Japanese patent application laid-open No. 2022-154818 Disclosure of Invention Here, in order to reduce the weight of an automobile, it is proposed to change the material of the suspension structure from iron to aluminum. Fig. 4 illustrates the toe stiffness in the case of the iron suspension structure 35 and the aluminum suspension structure 30. In fig. 4, the horizontal axis represents the lateral force applied to the wheel, and the vertical axis represents the toe angle. In fig. 4, although the values on the horizontal axis and the vertical axis are omitted, the right-side value on the horizontal axis is larger and the upper-side value on the vertical axis is larger. As shown in fig. 4, in the aluminum suspension structure 30 (the suspension structure according to the comparative example described later), the toe angle is smaller for the same lateral force than for the iron suspension structure 35. Therefore, it is known that the front beam rigidity of the aluminum suspension structure 30 (the suspension structure according to the comparative example described later) is higher than that of the iron suspension structure 35. Fig. 5 illustrates yaw rates with respect to the steering wheel angle in the case of an iron suspension structure and an aluminum suspension structure. In fig. 5, the values on the vertical axis are omitted, but the values on the upper side of the vertical axis are larger. Focusing on the periphery of the steering wheel angle of 0 degrees shown in fig. 5, in the case of the iron suspension structure, the data deviation is large and the yaw rate is unstable. In contrast, in the case of an aluminum suspension structure (suspension structure according to a comparative example described later), the data deviation is small and the yaw rate is stable. That is, as shown in fig. 4 and 5, in the aluminum suspension structure, the toe stiffness is higher and the yaw rate is also stabilized as compared with the iron suspension structure. However, in the aluminum suspension structure, there is a case where the steering feeling is not appropriate in the functional evaluation. The present invention has been made in view of such circumstances, and provides a suspension structure capable of improving steering feeling. In the suspension structure according to the present invention, a steering gear box is fastened to a hollow boss provided to a suspension member, wherein the diameter of the outer periphery of the boss is larger on the side where the steering gear box is fastened than on the front side of a vehicle body. In the suspension structure according to the present invention, the diameter of the outer periphery of the boss is larger on the side where the steering gear box is fastened than on the vehicle body front side. With such a configuration, in the suspension structure according to the present invention, the steering gear box is further deformed, and the steering reaction force increases. Therefore, in the suspension structure according to the present invention, the appropriate steering reaction force is obtained, and the gap between the steering reaction force and the turning operation of the vehicle is reduced, so that the steering feel can be improved. In the suspension structure according to the present invention, an opening may be provided near the boss of the suspension member. Even in this configuration, an appropriate steering reaction force can be formed, and a gap between the steering reaction force and the turning operation of the vehicle can be reduced, so that the steering feel can be improved. The diameter of the outer periphery of the boss may be reduced from the side where the steering gear box is fastened to the front side of the vehicle body. Even in this configuration, an appropriate steering reaction force can be formed, and a gap between the steering reaction force and the turning operation of the vehicle can be reduced, so that the steering feel can be improved. Effects of the invention The present invention can provide a suspension structure capable of improving steering feeling. Drawings Fig. 1 is an xz plan view of the suspension structure according to embodiment 1. Fig. 2 is a yz cross-sectional view of the suspension structure according to embodiment 1. Fig. 3 is a graph showing the results of analysis of the amounts of deformation of the suspension structure according to the comparative example and the suspension structure according to embodiment 1. Fig. 4 is a diagram showing the toe stiffness in the case of an iron suspension structure and an aluminum suspension structure. Fig. 5 is a graph showing yaw rate with respect to a steering wheel angle in the case of an