CN-122008756-A - Novel angle-adjustable air spring installation device

Abstract

The invention discloses a novel angle-adjustable air spring installation device applied to a vehicle air suspension, which comprises a guide rail assembly, a ball screw assembly, an angle adjusting actuating mechanism and a motor driving system, wherein the guide rail assembly is arranged on a lower swing arm, the ball screw assembly is matched with the guide rail assembly and is responsible for transmitting power, the angle adjusting actuating mechanism is matched with the ball screw assembly to realize the change of an air spring installation angle, the motor driving system is connected with the ball screw assembly and is used for driving the ball screw assembly to move so as to change the angle adjusting actuating mechanism, the lower swing arm is used as a fixed base, the whole structure is simplified, the active adjustment of the air spring installation angle is realized, the rigidity performance of the suspension is optimized, the running stability and the comfort of a vehicle are improved, and the road condition adaptability of the suspension system is enhanced.

Inventors

• CHEN JUNJIE
• HUANG YONGHUI
• GAN YUFENG
• ZHONG HONG

Assignees

• 江西理工大学

Dates

Publication Date

20260512

Application Date

20260407

Claims (9)

1. 1. Novel angularly adjustable air spring installs device, its characterized in that includes: a fixed base; a guide rail assembly disposed above the fixed base; the ball screw assembly is arranged in the middle of the guide rail mechanism; The angle adjusting executing mechanism is arranged above the ball screw assembly and the guide rail assembly; And a motor driving system disposed above the fixed base.
2. 2. The stationary base of claim 1, wherein the stationary base is comprised of a frame and a lower swing arm, the rail assembly and the ball screw assembly being mounted directly on the lower swing arm, the motor drive system being mounted directly on the frame.
3. 3. The guide rail assembly according to claim 1, wherein the guide rail assembly comprises a guide rail and two sliding blocks, the guide rail is of a double-guide-rail structure, the guide rail is symmetrically arranged on two sides of the ball screw assembly and is fixed on the lower swing arm, and the two sliding blocks are respectively arranged below the left side and the right side of the movable platform and do linear reciprocating motion along the guide rail.
4. 4. The ball screw assembly according to claim 1, wherein the ball screw assembly comprises a screw, a nut bracket and a bearing seat, wherein two ends of the screw are supported in the bearing seat on the lower swing arm through bearings, the nut is in threaded fit with the screw to convert rotary motion of a motor into linear motion, and the nut bracket is fixedly connected with the nut.
5. 5. The ball screw assembly of claim 4, wherein the ball screw assembly employs a pre-tightened nut configuration to eliminate back lash and improve drive stiffness and repeatability.
6. 6. The angle adjusting actuator of claim 1, wherein the angle adjusting actuator comprises a moving platform, a connecting rod and an air spring mounting plate, the moving platform is fixedly connected with the sliding block, the nut bracket is arranged below the middle of the moving platform and is fixedly connected with the moving platform, the nut bracket and the moving platform are directly fixed through bolts or are in an integrated structure, one end of the connecting rod is hinged to the moving platform, the other end of the connecting rod is hinged to the air spring mounting plate, and the other end of the air spring mounting plate is hinged to the lower swing arm through a revolute pair.
7. 7. The angle adjustment actuator of claim 6, wherein the linkage is a single linkage or a side-to-side symmetrical double linkage or other supportable multiple linkage.
8. 8. The angle adjustment actuator of claim 1 or 6, wherein the air spring mounting plate has an adjustable angle about its hinge point with the lower swing arm in the range of 5 ° -25 °.
9. 9. The motor drive system of claim 1, wherein the motor drive system comprises a motor, a speed reducer and a bi-directional universal joint, wherein the motor output shaft is connected with the bi-directional universal joint through the speed reducer, and the bi-directional universal joint is connected with one end of a screw rod of the ball screw assembly and is used for compensating shaft system installation deviation and dynamic deviation caused by suspension movement.

Description

Novel angle-adjustable air spring installation device Technical Field The invention relates to the technical field of automobile suspension systems, in particular to an air spring installation angle adjusting device integrated on a lower swing arm of a vehicle, which is particularly suitable for an intelligent suspension system needing to dynamically adjust the air spring installation angle to optimize suspension performance. Background In modern vehicle suspension systems, air springs are widely applied to high-end passenger vehicles, commercial vehicles and special vehicles due to variable rigidity and height adjustment capability, and traditional air springs mostly adopt fixed mounting structures, wherein the mounting angles of the air springs are determined in a design stage and cannot be actively adjusted along with the change of driving working conditions, so that optimal suspension geometric characteristics are difficult to realize under different loads, road conditions or driving modes, and the control stability, riding comfort and tire grounding performance of the vehicles are affected. In the prior art, although the suspension performance parameters are changed by partially adopting the scheme of adjusting the height of the suspension by an active push rod or a hydraulic cylinder, no structural scheme for changing the suspension performance parameters by continuously and actively adjusting the mounting angle of an air spring exists, and most of the structural schemes have complex structures, large occupied space and are difficult to integrate in a compact chassis environment. Therefore, there is a need for an air spring angle adjustment device that is compact in structure, quick in response, and capable of being integrated into existing suspension systems, and that achieves real-time optimization of suspension geometry and performance parameters. Disclosure of Invention An object of the present invention is to solve the above-described problems and provide advantages to be described later. The invention further aims to provide a novel angle-adjustable air spring mounting device applied to the air suspension of the distributed electric drive vehicle, which is characterized in that the lower swing arm is used as a fixed base, all adjusting mechanisms are integrated on the lower swing arm, an additional support is not needed, the structure is remarkably simplified, the space of a chassis is saved, the whole structure is compact, the rigidity is good, the integration level of the distributed electric drive vehicle is greatly improved, and the air spring mounting device is particularly suitable for application scenes with high requirements on the integration level of the chassis, such as the distributed electric drive vehicle. More specifically, the invention is realized by the following technical scheme: the invention provides a novel angle-adjustable air spring installation device, which is characterized by comprising: a fixed base; a guide rail assembly disposed above the fixed base; the ball screw assembly is arranged in the middle of the guide rail mechanism; The angle adjusting executing mechanism is arranged above the ball screw assembly and the guide rail assembly; And a motor driving system disposed above the fixed base. In some technical schemes, the fixed base is composed of a frame and a lower swing arm, wherein one end of the lower swing arm is hinged with the frame through a revolute pair, the other end of the lower swing arm is connected with a wheel through a spherical pair, the guide rail component and the ball screw component are directly and integrally arranged on the lower swing arm, and the motor driving system is arranged on the frame to realize the separation layout of driving and bearing. In some technical schemes, the guide rail assembly adopts a double guide rail structure, two guide rails are symmetrically arranged on two sides of the ball screw assembly and fixed on the surface of the lower swing arm, the sliding blocks and the guide rails form a linear sliding pair, and the two sliding blocks are respectively connected with the left side and the right side of the movable platform so as to improve the unbalanced load resistance in the movement process. In some technical schemes, the ball screw assembly comprises a screw, a nut bracket and bearing seats at two ends, the screw is supported in the bearing seats on the swing arm through bearings, the nut and the screw form a precise thread transmission pair, and the nut bracket is rigidly connected with the nut and is used for transmitting linear driving force. In some technical schemes, the nut in the ball screw assembly adopts a pre-tightening structure design, and the transmission reverse gap is eliminated through internal pre-loading, so that the rigidity and the repeated positioning precision of the system are improved. In some technical schemes, the angle adjustment actuating mechanism comprises a moving platform, a connec