CN112326273A

CN112326273A - Double wishbone independent suspension durability test bench

Info

Publication number: CN112326273A
Application number: CN202010324613.6A
Authority: CN
Inventors: 曾洋洋; 卢金良; 邵庆刚
Original assignee: Dongfeng Dana Axle Co Ltd
Current assignee: Dongfeng Dana Axle Co Ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-02-05

Abstract

A durability test bed for a double-cross-arm independent suspension is used for automobile manufacturing. The lateral support, the longitudinal support, the first fixed base, the second fixed base and the upright post are fixed by the floor surface; the beam is fastened between the upright posts and is connected with an air bag and a shock absorber in the suspension assembly; the mounting frame is fastened on the first fixed base and the second fixed base, and a mounting interface which can be directly connected with a swing arm assembly in the suspension assembly is arranged on the mounting frame; the rim clamp is arranged at the end face of a hub of the suspension assembly, the rim clamp is connected with the hub of the suspension assembly, and the lower bottom surface of the rim clamp is connected with the adapter bracket; the switching frame is simultaneously connected with the spherical hinge structures at the actuating ends of the three actuating cylinders; the spherical hinge structures at the fixed ends of the three actuating cylinders are respectively connected with the lateral support, the longitudinal support and the fall surface. The invention can realize the three-way composite loading of the suspension assembly, can control the stress of the suspension assembly in real time, ensures the accuracy and reliability of test loading and solves the problem of the universality of the test bench.

Description

Double-cross arm independent suspension endurance test stand

Technical Field

The invention relates to the technical field of automobile manufacturing, in particular to a double-cross-arm independent suspension endurance test bed.

Background

The double-cross-arm independent suspension needs to use a multi-channel hydraulic comprehensive test bed to carry out three-direction loading endurance tests on the double-cross-arm independent suspension, wherein the three-direction loading endurance tests comprise a vertical force loading test, a lateral force loading test, a longitudinal force loading test, a mixed loading test and the like.

At present, it is still less to two xarm independent suspension endurance test benches scheme of buildding, most racks can only be used for the endurance test of whole rigid bridge, and most all are to single operating mode loading process, a small number can carry out the two-way loading process simultaneously, two xarm independent suspension test benches that exist at present, the three-dimensional actuating cylinder adopts similar "triangular pyramid" structure mostly, three direction actuating cylinder all has certain contained angle with ground promptly, this kind of arrangement structure anchor clamps design is very complicated, and the height of whole rack is also very high, it is very unfavorable to the security of tester. In order to meet the automobile market demand, more and more finished automobile manufacturers try to use an independent suspension to replace an integral rigid bridge in the development of new automobile models, so that a reasonable double-cross-arm independent suspension endurance test method and a complete double-cross-arm independent suspension endurance test bench are very necessary to establish.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a durability test bed for a double-cross-arm independent suspension, which can simulate the actual stress state of the suspension and simultaneously carry out three-way loading and is used for verifying the durability of the double-cross-arm independent suspension.

In order to achieve the purpose, the lateral support, the longitudinal support, the first fixed base, the second fixed base and the upright post are fixed on the floor surface through foundation bolts; the cross beam is fastened between the upright columns through bolts and is connected with an air bag and a shock absorber in the suspension assembly; the mounting frame is fastened on the first fixed base and the second fixed base, and a mounting interface which can be directly connected with a swing arm assembly in the suspension assembly is arranged on the mounting frame; the rim clamp is arranged at the end face of a hub of the suspension assembly, the rim clamp is connected with the hub of the suspension assembly through a flange bolt, and the lower bottom surface of the rim clamp is connected with the adapter bracket; the switching frame is simultaneously connected with the actuating end spherical hinge structures of the lateral actuating cylinder, the longitudinal actuating cylinder and the vertical actuating cylinder; the fixed end spherical hinge structures of the lateral actuating cylinder, the longitudinal actuating cylinder and the vertical actuating cylinder are respectively connected with the lateral support, the longitudinal support and the fall surface; the test bed simultaneously adopts three-way actuating cylinders of a lateral actuating cylinder, a longitudinal actuating cylinder and a vertical actuating cylinder for loading, and the loading in three directions of the suspension assembly is controlled by controlling the magnitude, the loading frequency and the phase angle of the loading force of the three-way actuating cylinders.

The floor surface is a horizontal positioning reference surface of the lateral actuating cylinder, the longitudinal actuating cylinder, the mounting frame and the upright post; the fall plane is another plane parallel to and lower in height than the floor surface.

The height of the mounting interface of the beam on the upright post is adjustable.

The three-way actuating cylinder is adopted, the three-way composite loading of the suspension assembly can be realized, the stress of the suspension assembly is controlled in real time by adjusting the load size, the loading frequency and the phase angle of the three-way actuating cylinder, and the accuracy of test loading is ensured; by adopting the structure of the upright post and the cross beam, the mounting height of the air bag and the shock absorber can be adjusted, the suspension assemblies with different mounting heights can be met, the problem of universality of a test bed is well solved, the reverse constraint force generated by the cross beam on the air bag can be equivalent to the load of the air bag in a design state, and the consistency of the stress state of the suspension assembly bed and a real vehicle is ensured; the rim clamp is adopted to replace an actual rim, so that the constraint state of the hub of the suspension assembly is simulated really, and the cost is reduced; the switching frame structure is adopted, so that the loading position of the ground to the acting force of the wheels can be simulated really; by adopting the spherical hinge structure, the over-constrained state of the rack can be solved, and the problem of motion interference caused by simultaneous loading of a plurality of actuating cylinders is avoided. The test bed has the advantages of simple structure, convenience in construction, low manufacturing cost and high reliability.

Drawings

Fig. 1 is a front perspective view of the present invention.

Fig. 2 is a rear perspective view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a connection structure diagram of the cylinder of fig. 1.

In the figure: 1. a floor surface; 2. a drop surface; 3. a lateral actuating cylinder; 4. a longitudinal actuating cylinder; 5. a vertical actuating cylinder; 6. a lateral support; 7. a longitudinal support; 8. a first fixed base; 9. a second fixed base; 10. a mounting frame; 11. a transfer rack; 12. a column; 13. a cross beam; 14. a rim clamp; 15. a suspension assembly; 16. a spherical hinge structure; 17. an actuating end; 18. and a fixed end.

Detailed Description

As shown in fig. 1, 2, 3 and 4, the durability test bed for the double-wishbone independent suspension provided by the invention mainly comprises a floor surface 1, a drop surface 2, a lateral actuating cylinder 3, a longitudinal actuating cylinder 4, a vertical actuating cylinder 5, a lateral support 6, a longitudinal support 7, a first fixed base 8, a second fixed base 9, an installation frame 10, an adapter frame 11, an upright post 12, a cross beam 13, a rim clamp 14 and the like.

The floor surface 1 is a horizontal reference surface, the floor surface 1 is a positioning reference of the whole test bench device, the installation angles of the lateral actuating cylinders 3 and the longitudinal actuating cylinders 4 are determined by the floor surface 1, the drop surface 2 is the other plane which is parallel to and lower than the floor surface 1 in height, and the drop surface 2 is mainly used for arranging the vertical actuating cylinders 5, so that the arrangement height of the vertical actuating cylinders 5 can be reduced, and the space height of the whole test bench device is reduced. The iron floor surface 1 fixes the lateral support 6, the longitudinal support 7, the first fixing base 8, the second fixing base 9 and the upright post 12 through foundation bolts so as to ensure that the whole rack system has enough supporting strength and stability. The height difference exists between the fall surface 2 and the floor surface 1 in the vertical direction, the fall surface 2 is connected with a spherical hinge structure 16 of a fixed end 18 in the vertical actuating cylinder 5 through a foundation bolt, meanwhile, the spherical hinge structure 16 in an actuating end 17 of the vertical actuating cylinder 5 is connected with the bottom surface of the adapter bracket 11 through a bolt, and the adapter bracket 11 is of a cubic structure. The adapter 11 is fastened from the side to the actuating end 17 of the lateral cylinder 3, the lateral cylinder 3 is arranged parallel to the floor surface 1, and its fastening end 18 is fastened to the lateral support 6. The main viewing surface of the adapter 11 is connected to the actuating end 17 of the longitudinal cylinder 4, while the fixed end 18 of the longitudinal cylinder 4 is fastened to the longitudinal support 7. The upper top surface of the adapter 11 is fixedly connected with the lower bottom surface of the rim clamp 14, the side surface of the rim clamp 14 is provided with a flange bolt hole, the wheel end of the suspension assembly 15 can be tightly connected with the rim clamp 14 through the flange bolt, and the rim clamp 14 can replace the action of a rim, so that forces in different directions generated by a road surface to a wheel can be coupled to a wheel hub. The beam 13 is provided with a mounting interface of a suspension assembly 15 air bag and a shock absorber, and two ends of the beam 13 are fixedly connected with the upright post 12. The bottom surface of the mounting frame 10 is connected with the first fixed base 8 and the second fixed base 9, and the mounting frame 10 can provide mounting interfaces for the upper cross arm and the lower cross arm of the suspension assembly 15.

The upright post 12 is provided with bolt holes distributed according to different heights, the height of the cross beam 13 can be adjusted by changing the connection positions of the bolt holes, and the height of the cross beam 13 determines the installation height of an air bag of the suspension assembly 15, so the rack structure can be suitable for double-cross-arm suspension assemblies with different air bag installation heights, in addition, the cross beam 13 and the upright post 12 are in fastening connection, the expansion of the air bag during inflation can be limited, namely, a reverse force is generated on the expanded air bag, and the reverse force is equivalent to the load of the air bag bearing vehicle body under the whole vehicle state, so the double-cross-arm endurance test stand can truly simulate the stress state of the suspension assembly 15 under the whole vehicle initial state, and the test precision is improved.

During road running of a vehicle, a tire ground contact point is generally subjected to forces from three directions on the ground: longitudinal force, lateral force and vertical force, and the magnitude, the frequency of action, the phase angle of these three forces all change. The switching frame 11 is simultaneously connected with actuating cylinders in three directions, namely a lateral actuating cylinder 3, a longitudinal actuating cylinder 4 and a vertical actuating cylinder 5, and the structure can truly simulate the acting force of the ground on the tire in the whole vehicle road test process, namely the acting line intersection point of the three actuating cylinders is the tire grounding point. The loading frequency and the phase angle of the lateral actuating cylinder 3, the longitudinal actuating cylinder 4 and the vertical actuating cylinder 5 can be different, the magnitude, the acting frequency and the phase angle of the forces of the actuating cylinders in three directions can be set according to real road surface input information to simulate ground dynamic load, the authenticity of the input load of the suspension endurance test stand is improved, the reliability of test results can be improved, the dynamic load of wheels during a road test of the whole vehicle can be accurately simulated, and the authenticity of test boundaries is increased.

The lateral actuating cylinder 3, the longitudinal actuating cylinder 4 and the vertical actuating cylinder 5 are all hydraulic servo actuating cylinders, the actuating cylinders in three directions are independent from each other, the loading process is not influenced, the lateral actuating cylinder 3, the longitudinal actuating cylinder 4 and the fixed end 18 and the actuating end 17 of the vertical actuating cylinder 5 are respectively provided with a spherical hinge structure 16, namely, the cylinder body and the actuating head of the actuating cylinder are not directly connected with the outside, but a spherical hinge structure 16 is adopted for switching, the degrees of freedom of the lateral actuating cylinder 3, the longitudinal actuating cylinder 4 and the vertical actuating cylinder 5 can be increased, the problem of space motion interference caused by the simultaneous action of the three cylinders is avoided, the actuating head of each actuating cylinder only has one degree of freedom relative to the cylinder body, if the actuating heads of the three actuating cylinders are directly and fixedly connected with the switching frame 11, the actuating cylinder body can be deformed and even damaged, and the degrees of freedom of the actuating heads are increased by the spherical hinge structure 16, interference is avoided, and the reasonability of the test bed structure is improved.

The arrangement directions of the actuating cylinders of the invention and the ground are only two types: perpendicular to the ground or parallel to the ground, the design structure of the clamp is simplified, and the height of the whole test bed can be the minimum height within the allowable range.

Claims

1. A double wishbone independent suspension durability test bench, characterized in that: the floor surface (1) connects the lateral support (6), longitudinal support (7), fixed base one (8), The second fixed base (9) and the column (12) are fixed; the beam (13) is fastened between the columns (12) by bolts, and the beam (13) is connected to the airbag and the shock absorber in the suspension assembly (15); installation The frame (10) is fastened on the fixed base one (8) and the fixed base two (9), and the mounting frame (10) is provided with an installation which can be directly connected with the swing arm assembly in the suspension assembly (15). Interface; the rim clamp (14) is installed at the end face of the hub of the suspension assembly (15), the rim clamp (14) and the hub of the suspension assembly (15) are connected by flange bolts, and the lower bottom surface of the rim clamp (14) It is connected with the adapter frame (11); the adapter frame (11) is simultaneously connected with the actuation ends (17) of the lateral actuation cylinder (3), the longitudinal actuation cylinder (4) and the vertical actuation cylinder (5). The spherical hinge structure (16) is connected; The support (6), the longitudinal support (7), and the drop surface (2) are connected; the test bench adopts three lateral actuation cylinders (3), longitudinal actuation cylinders (4), and vertical actuation cylinders (5). The actuating cylinder is loaded, and the three-direction loading control of the suspension assembly (15) is realized by controlling the magnitude of the loading force, the loading frequency and the phase angle of the three-directional actuating cylinder.

2. The double wishbone independent suspension durability test bench according to claim 1, characterized in that: the floor surface (1) is a lateral actuating cylinder (3), a longitudinal actuating cylinder (4), a mounting frame (10) and the horizontal positioning reference plane of the upright column (12); the drop plane (2) is another plane parallel and lower than the floor plane (1).

3. The double wishbone independent suspension durability test bench according to claim 1, wherein the installation interface of the beam (13) on the column (12) is adjustable in height.