A suspension KC test fixture

Abstract

A suspension KC test fixture is used for automobile suspension KC characteristic test. The height of the fixture is adjusted by sliding between the column and the crossbeam; the crossbeam is provided with a vertical guide rail and a transverse guide rail, which are respectively used to connect the longitudinal guide frame in the bushing installation and positioning device and the airbag transverse slider in the airbag installation and positioning device, the airbag transverse slider is fixed to the airbag longitudinal guide frame, the inner side of the airbag longitudinal guide frame has a longitudinal guide rail connected to the airbag longitudinal slider, and the airbag mounting seat is connected to the airbag longitudinal slider by bolts; the bushing longitudinal slider is slidably connected to the longitudinal guide rail of the longitudinal guide frame, and the bushing longitudinal slider has vertical slide rails at both ends to connect the bushing vertical slider, and at the same time, the bushing vertical slider has transverse slide rails to connect the bushing mounting seat; the shock absorber longitudinal slider has vertical slide rails at both ends to connect the shock absorber mounting seat. The present invention is mainly designed for double wishbone independent suspension, and all suspension interface positions can be adjusted in the three coordinate axis directions, which has great versatility.

Description

Technical Field

[0001] The invention relates to the technical field of KC test of vehicle chassis system, in particular to a KC test bench fixture for suspension of vehicle chassis system. Background Art

[0002] In recent years, with the development of technology in the automotive field in my country, people's requirements for vehicle maneuverability have also been greatly improved. Vehicle handling stability not only affects the ease of driving, but is also an important indicator for determining vehicle safety during driving. Suspension KC performance specifically refers to Kinematics (geometric spatial motion characteristics of suspension and steering systems) and Compliance (force and deformation of suspension components), which is an important basis for vehicle dynamics. The KC performance of the suspension directly affects the handling stability of the vehicle. The suspension K and C characteristics respectively reflect the changes in wheel alignment parameters and the deformation of each elastic element and the force at the hard point when the tire is subjected to external loads. Through KC performance analysis, the handling stability of the vehicle can be predicted, optimized and improved. The suspension KC test bench is built based on KC performance analysis. At present, most of the domestic KC test benches are installed on the suspension and then loaded. Due to the lack of special fixtures, it is difficult to directly perform KC test loading at the suspension level. Therefore, many suspension level problems need to be verified at the vehicle level, which prolongs the suspension development cycle. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a suspension KC test fixture so that a separate suspension assembly can be loaded with a KC test.

[0004] To achieve the above-mentioned purpose of the invention, the interface of the clamp of the present invention includes an airbag installation positioning device, a bushing installation positioning device and a shock absorber installation positioning device; the supporting structure of the clamp is a column, and the two cross beams are slidably matched with the guide rails on the four columns. The cross beams are simultaneously connected to the airbag transverse slider, longitudinal guide frame 1, and longitudinal guide frame 2. The longitudinal guide frame 1 and the longitudinal guide frame 2 are both placed between the two airbag longitudinal guide frames, and the longitudinal guide frame 1 is simultaneously connected to the bushing longitudinal slider of the upper swing arm of the suspension and the shock absorber longitudinal slider, and the longitudinal guide frame 2 is connected to the bushing longitudinal slider of the lower swing arm of the suspension.

[0005] The airbag installation and positioning device is composed of an airbag transverse slider, an airbag longitudinal guide frame, an airbag longitudinal slider, an airbag vertical slider, and an airbag mounting seat; the bushing installation and positioning device is composed of a longitudinal guide frame 1, a longitudinal guide frame 2, a bushing longitudinal slider, a bushing vertical slider, and a bushing mounting seat; the shock absorber installation and positioning device is composed of a shock absorber longitudinal slider, a shock absorber mounting seat, and a longitudinal guide frame 1.

[0006] The airbag installation and positioning device is symmetrical with respect to the center plane of the suspension, and one set is arranged on the left and right sides of the crossbeam. The airbag transverse slider is slidably connected to the transverse guide rail of the crossbeam, the airbag vertical slider is slidably connected to the vertical guide rail of the airbag transverse slider, the airbag vertical slider is fixed at both ends of the airbag longitudinal guide frame, the airbag longitudinal slider is slidably connected to the longitudinal slide rail on the inner side of the airbag longitudinal guide frame, and the airbag mounting seat is fixed to the airbag longitudinal slider with bolts.

[0007] The fixture is equipped with four sets of bushing installation and positioning devices, two sets are installed on each of the longitudinal guide frame 1 and the longitudinal guide frame 2, each bushing installation and positioning device installs and positions the bushings of the left and right suspensions, the longitudinal guide frame 1 and the longitudinal guide frame 2 are both matched with the vertical guide rails on the crossbeam, the bushing longitudinal slider is slidably connected to the longitudinal guide rails of the longitudinal guide frame 1 and the longitudinal guide frame 2, the bushing vertical slider is slidably connected to the vertical guide rails at both ends of the bushing longitudinal slider, and the bushing mounting seat is slidably connected to the transverse guide rails on the bushing vertical slider.

[0008] The longitudinal guide frame 1 is slidably connected to the longitudinal slider of the shock absorber, and the shock absorber mounting seat is slidably connected to the vertical guide rails at both ends of the longitudinal slider of the shock absorber.

[0009] The bushing longitudinal slider at the front position of the suspension lower swing arm is connected to the tie rod joint mounting seat by bolts.

[0010] The cross beam is provided with a transverse stabilizer bar mounting seat mounted with bolts, and the height of the transverse stabilizer bar mounting seat can be adjusted according to the height change of the connecting bolt hole.

[0011] The airbag mounting seat, bushing mounting seat, shock absorber mounting seat, tie rod joint mounting seat, and lateral stabilizer bar mounting seat all need to be designed and installed according to different suspension interface installation angles.

[0012] Compared with the prior art, the fixture of the present invention is built based on the KC performance analysis of the suspension. By clamping the suspension and performing KC performance analysis, it can predict, optimize and improve the handling stability of the whole vehicle, and can directly perform KC test loading at the suspension level. Problems at the suspension level can be reliably verified directly through the test bench, and no vehicle test verification is required, which effectively shortens the suspension development cycle. All suspension interface positions provided in the fixture can be adjusted in the three coordinate axis directions, and it has great versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the application structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the structure of the present invention.

[0015] Figure 3 for Figure 2 main view.

[0016] Figure 4 for Figure 2 Top view of the .

[0017] Figure 5 for Figure 2 Left view of .

[0018] Figure 6 for Figure 2 Schematic diagram of the structure of the airbag installation and positioning device.

[0019] Figure 7 for Figure 2 Schematic diagram of the structure of the middle bushing installation and positioning device.

[0020] Figure 8 for Figure 2 Schematic diagram of the structure of the central shock absorber installation and positioning device.

[0021] Fig. 9 for Figure 2 Schematic diagram of the local structure of the front bushing of the middle and lower swing arm.

[0022] In the figure: 1-clamp, 2-suspension, 3-column, 4-crossbeam, 5-airbag longitudinal guide frame, 6-longitudinal guide frame one, 7-airbag transverse slider, 8-airbag vertical slider, 9-shock absorber mounting seat, 10-shock absorber longitudinal slider, 11-airbag longitudinal slider, 12-lateral stabilizer bar mounting seat, 13-bushing longitudinal slider, 14-bushing vertical slider, 15-bushing mounting seat, 16-airbag mounting seat, 17-transverse tie rod joint mounting seat, 18-longitudinal guide frame two. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9As shown, the suspension 2 of the present invention is installed on the KC test fixture 1 through the interfaces of the airbag installation positioning device, the bushing installation positioning device and the shock absorber installation positioning device. The supporting structure of the fixture 1 is four columns 3, and the two ends of the two crossbeams 4 are slidably matched with the vertical guide rails of the columns 3. For different suspensions 2, the crossbeams 4 can slide on the columns 3 to adjust the height. After the height position is determined, the crossbeams 4 are fastened to the columns 3 with bolts to facilitate the rough adjustment of the vertical position of the suspension 2 interface. There is a vertical guide rail at the center line of the crossbeam 4, and there are transverse guide rails on both sides of the center line, which are mainly used to connect the airbag installation positioning device and the bushing installation positioning device. At the same time, the lower part of the crossbeam 4 is also provided with a transverse stabilizer bar mounting seat 12 for mounting the transverse stabilizer bar of the suspension 2. The vertical position of the transverse stabilizer bar mounting seat 12 is adjustable, and the height of the transverse stabilizer bar mounting seat 12 can be adjusted by adjusting the height of the connecting bolt hole.

[0024] Symmetrically with the central plane of the suspension 2, an airbag installation and positioning device is provided on the left and right sides of the crossbeam 4, and the airbag installation and positioning device mainly includes an airbag transverse slider 7, an airbag longitudinal guide frame 5, an airbag longitudinal slider 11, an airbag vertical slider 8, and an airbag mounting seat 16. The airbag transverse slider 7 is slidably connected to the transverse guide rail of the crossbeam 4 and can slide along the transverse guide rail of the crossbeam 4. When the airbag interface of the airbag mounting seat 16 is adjusted to a suitable position in the transverse direction, the airbag transverse slider 7 is fixed to the crossbeam 4 by bolts. There is a vertical guide rail on the airbag transverse slider 7. The airbag vertical slider 8 is slidably connected to the vertical guide rail on the airbag transverse slider 7. The airbag vertical slider 8 can slide along the guide rail to adjust the vertical position of the airbag interface. After the position is adjusted, it is fixed with bolts. The airbag vertical slider 8 is fixed together with the two ends of the airbag longitudinal guide frame 5. The inner side of the airbag longitudinal guide frame 5 is provided with a longitudinal slide rail, and the airbag longitudinal slider 11 can slide along it. When the position of the airbag interface of the airbag mounting seat 16 is adjusted to a suitable position, the airbag longitudinal slider 11 is fastened to the airbag longitudinal guide frame 15 by bolts, and the airbag mounting seat 16 and the airbag longitudinal slider 11 are connected by bolts.

[0025] The suspension 2 has a total of four sets of bushings, one on the left and one on the right of each set (left and right bushings in front of the upper swing arm, left and right bushings in the rear of the upper swing arm, left and right bushings in front of the lower swing arm, left and right bushings in the rear of the lower swing arm, longitudinal direction is the front-to-back direction, transverse direction is the left-right direction, and up and down is the vertical direction). The fixture 1 is equipped with four sets of bushing installation and positioning devices, two sets are installed on the longitudinal guide frame 1 6 and the longitudinal guide frame 2 18 respectively, and each bushing installation and positioning device installs and positions the bushings of the left and right suspensions 2. The device is mainly used to adjust the installation position of the upper and lower swing arm bushings in the double wishbone independent suspension 2. The bushing installation and positioning device mainly includes the longitudinal guide frame 1 6, the longitudinal guide frame 2 18, the bushing longitudinal slider 13, the bushing vertical slider 14, and the bushing mounting seat 15. The longitudinal guide frame 16 and the longitudinal guide frame 2 18 are both slidably matched with the vertical guide rails on the crossbeam 4. The longitudinal guide frame 16 is mainly used to adjust the position of the upper swing arm bushing and the shock absorber of the suspension 2, and the longitudinal guide frame 2 18 is mainly used to adjust the position of the lower swing arm bushing of the suspension 2. The bushing longitudinal slider 13 is slidably connected with the longitudinal guide rails of the longitudinal guide frame 16 and the longitudinal guide frame 2 18, and can slide along the longitudinal guide frame 16 and the longitudinal guide frame 2 18. After the position is adjusted, bolts are used to fix it. The bushing vertical slider 14 is slidably connected with the vertical guide rails at both ends of the bushing longitudinal slider 13, and can slide along the vertical guide rails. After the position is determined, bolts are used to fix the bushing vertical slider 14 to the vertical guide rails on the bushing longitudinal slider 13. The bushing mounting seat 15 is slidably connected to the transverse guide rail on the bushing vertical slider 14. The bushing mounting seat 15 can slide laterally along this transverse guide rail to adjust the transverse distance between the left and right bushings. After the distance between the left and right bushings is determined, the bushing mounting seat 15 is fastened to the bushing vertical slider 14 with bolts.

[0026] The shock absorber installation and positioning device mainly includes a shock absorber longitudinal slider 10, a shock absorber mounting seat 9, and a longitudinal guide frame 6. The shock absorber longitudinal slider 10 is slidably connected to the longitudinal guide frame 6 and can slide along the longitudinal guide frame 6. After the position is adjusted, the shock absorber longitudinal slider 10 is fixed to the longitudinal guide frame 6 by bolts. The shock absorber longitudinal slider 10 is also provided with a vertical guide rail. The shock absorber mounting seat 9 is slidably connected to the vertical guide rails at both ends of the shock absorber longitudinal slider 10 and can slide vertically along the guide rails. After the position of the shock absorber mounting seat 9 is adjusted, it is fixed to the shock absorber longitudinal slider 10 by bolts.

[0027] At the front position of the lower arm of the suspension 2, the bushing longitudinal slider 13 is connected to the tie rod joint mounting seat 17 by bolts. The tie rod joint mounting seat 17 is mainly used to lock the steering system. This suspension KC test bench does not perform self-aligning torque loading.

[0028] The airbag mounting seat 16, bushing mounting seat 15, shock absorber mounting seat 9, anti-roll bar mounting seat 12, and tie rod joint mounting seat 17 described in the fixture 1 can be selected according to the different tonnages of the suspension 2. The interface of the suspension 2 not only has requirements on the position, but also has requirements on the installation angle of each component. Considering that the suspension 2 sometimes has a certain angle at the interface position during installation, it is necessary to design the mounting seat structure of each component according to the required installation angle to meet the versatility of the KC test fixture.

[0029] The KC test fixture 1 proposed in the present invention is mainly designed for double wishbone independent suspension. The fixture can be suitable for double wishbone independent suspensions with different structures such as different tonnage, wheelbase, airbag installation distance, bushing installation position, etc. The fixture mainly uses guide rails to adjust the interface position and has high installation accuracy.

Claims

1. A suspension KC test fixture, characterized in that: The interface of the fixture (1) includes an airbag installation positioning device, a bushing installation positioning device and a shock absorber installation positioning device; the supporting structure of the fixture (1) is a column (3), two crossbeams (4) are slidably matched with the guide rails on the four columns (3), the crossbeam (4) is simultaneously connected to the airbag transverse slider (7), the longitudinal guide frame 1 (6), and the longitudinal guide frame 2 (18), the longitudinal guide frame 1 (6) and the longitudinal guide frame 2 (18) are both placed between the two airbag longitudinal guide frames (5), and the longitudinal guide frame 1 (6) is simultaneously connected to the bushing longitudinal slider (13) of the suspension upper swing arm and the shock absorber longitudinal slider (10) , the longitudinal guide frame 2 (18) is connected to the bushing longitudinal slider (13) of the suspension lower arm; the airbag installation and positioning device is composed of an airbag transverse slider (7), an airbag longitudinal guide frame (5), an airbag longitudinal slider (11), an airbag vertical slider (8), and an airbag mounting seat (16); the bushing installation and positioning device is composed of a longitudinal guide frame 1 (6), a longitudinal guide frame 2 (18), a bushing longitudinal slider (13), a bushing vertical slider (14), and a bushing mounting seat (15); the shock absorber installation and positioning device is composed of a shock absorber longitudinal slider (10), a shock absorber mounting seat (9), a longitudinal guide frame The airbag mounting and positioning device is symmetrical with respect to the central plane of the suspension (2), and one set is provided on the left and right sides of the crossbeam (4); the airbag transverse slider (7) is slidably connected to the transverse guide rail of the crossbeam (4); the airbag vertical slider (8) is slidably connected to the vertical guide rail of the airbag transverse slider (7); the airbag vertical slider (8) is fixed to both ends of the airbag longitudinal guide frame (5); the airbag longitudinal slider (11) is slidably connected to the longitudinal slide rail on the inner side of the airbag longitudinal guide frame (5); the airbag mounting seat (16) is fixed to the airbag longitudinal slider (11) by bolts; the fixture (1) is equipped with four sets of bushings The positioning device is installed, and two sets are installed on each of the longitudinal guide frame 1 (6) and the longitudinal guide frame 2 (18). Each bushing installation positioning device installs and positions the bushings of the left and right suspensions (2). The longitudinal guide frame 1 (6) and the longitudinal guide frame 2 (18) are both matched with the vertical guide rails on the crossbeam (4). The bushing longitudinal slider (13) is slidably connected to the longitudinal guide rails of the longitudinal guide frame 1 (6) and the longitudinal guide frame 2 (18). The bushing vertical slider (14) is slidably connected to the vertical guide rails at both ends of the bushing longitudinal slider (13). The bushing mounting seat (15) is slidably connected to the transverse guide rails on the bushing vertical slider (14).

2. A suspension KC test fixture according to claim 1, characterized in that: The longitudinal guide frame 1 (6) is slidably connected to the shock absorber longitudinal slider (10), and the shock absorber mounting seat (9) is slidably connected to the vertical guide rails at both ends of the shock absorber longitudinal slider (10).

3. A suspension KC test fixture according to claim 1, characterized in that: The bushing longitudinal slider (13) at the front position of the suspension lower arm is connected to the tie rod joint mounting seat (17) by bolts.

4. A suspension KC test fixture according to claim 1, characterized in that: The crossbeam (4) is provided with a transverse stabilizer bar mounting seat (12) mounted by bolts, and the height of the transverse stabilizer bar mounting seat (12) can be adjusted according to the height change of the connecting bolt hole.

5. The suspension KC test fixture according to claim 1, characterized in that: The airbag mounting seat (16), bushing mounting seat (15), shock absorber mounting seat (9), tie rod joint mounting seat (17), and lateral stabilizer bar mounting seat (12) all need to be designed and installed according to different suspension (2) interface installation angles.

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