CN115366596A

CN115366596A - Double trailing arm type suspension system

Info

Publication number: CN115366596A
Application number: CN202211011613.6A
Authority: CN
Inventors: 邵愈栋; 滕伟; 万燕霞
Original assignee: Kewo New Energy Automobile Group Co ltd
Current assignee: Kewo New Energy Automobile Group Co ltd
Priority date: 2022-08-23
Filing date: 2022-08-23
Publication date: 2022-11-22

Abstract

The invention discloses a double-trailing-arm suspension system which comprises a steering driven axle, wherein the steering driven axle comprises an axle pipe and two trailing-arm supports welded on the axle pipe at intervals, each trailing-arm support comprises an upper tail end extending to the upper part of the axle pipe and a lower tail end extending to the lower part of the axle pipe, an upper trailing arm is arranged at the upper tail end of each trailing-arm support, a lower trailing arm is arranged at the lower tail end of each trailing-arm support, strut supports are welded on the outer sides of the two trailing-arm supports on the axle pipe respectively, a strut assembly is arranged on each strut support, and each strut assembly comprises a shock absorber and a spiral spring, wherein the shock absorber is arranged together with the strut supports, and the spiral spring is sleeved on the outer sides of the shock absorbers. The spiral spring on the support pillar support is not required to be arranged above the wheel, so that the height of the frame can be greatly reduced, and more design space is provided for the frame and the vehicle.

Description

Double trailing arm type suspension system

The technical field is as follows:

the invention relates to a double trailing arm type suspension system, and belongs to the technical field of automobile chassis components.

Background art:

with the high scale penetration rate of the Chinese autopilot market, the autodrive market is full of flowers in the future. With the addition of AI technology, the step of driving the car to intelligent step is not blocked. The demand of the universal modularized flat wire control chassis arises, and the wire control chassis which is developed and applied to a low-speed cargo-carrying scene can meet the large-scale application scene demand of unmanned delivery logistics vehicles.

For many chassis carrying macpherson suspension systems, the following disadvantages are readily found: 1. the camber angle of the wheel is greatly influenced by the height of the suspension, an engineer is required to divide the wheel jumping range, and a CAE analysis technology is used for adjusting the suspension system, so that the process control difficulty is high, the cost is high, and the problems of tire damage and the like possibly occur in the follow-up process; 2. the use of a wide front wheel is not suitable, the steering characteristic is deteriorated due to the large kingpin inclination angle, and for the Macpherson suspension, the limit of the kingpin inclination angle is equal to the limit of the width of the front wheel; 3. it is generally not suitable for low bodies, also because of the castor angle, and the springs are generally designed above the wheels in order to avoid them.

Therefore, there is a need to improve the prior art to overcome the deficiencies of the prior art.

The invention content is as follows:

the present invention provides a double trailing arm suspension system to solve the above problems of the prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a two trailing arm type suspension systems, is including turning to driven axle, turn to driven axle and include bridge tube and two trailing arm supports of interval welding on the bridge tube, the trailing arm support is including extending to the last end of bridge tube top and extending to the lower end of bridge tube below the trailing arm is installed to the last end of trailing arm support the lower end of trailing arm support is installed down the trailing arm, the pillar support has been welded respectively in the outside that lies in two trailing arm supports on the bridge tube, install the pillar assembly on the pillar support, the pillar assembly includes locates the coil spring in the bumper shock absorber outside with pillar support mounting together and cover.

Furthermore, the upper trailing arm and the lower trailing arm are respectively composed of a connecting pipe, a liner pipe and a buffer sleeve, and the liner pipe comprises two pipes welded at the front end and the rear end of the connecting pipe.

Further, the cushion collar is fixed in the liner tube by press fitting.

Furthermore, bolts penetrate through the upper tail end and the lower tail end of the longitudinal arm support, the bolts penetrate through the buffer sleeve, and nuts are mounted at the two tail ends of the bolts respectively to mount the upper longitudinal arm, the lower longitudinal arm and the longitudinal arm support together.

Further, the lengths of the upper trailing arm and the lower trailing arm are designed to be equal.

Further, one end of the shock absorber is fixed by a bolt and a nut after being mounted with the strut mount.

Furthermore, the steering driven axle also comprises a wheel side brake assembly, a main pin and a steering knuckle arm, wherein the main pin and the steering knuckle arm are welded at two tail ends of the axle tube.

Further, the wheel brake assembly is bolted to the kingpin and the track arm.

The invention has the following beneficial effects:

1. the spiral spring on the pillar support does not need to be arranged above the wheel, so that the height of the frame can be greatly reduced, and more design space is provided for the frame and the vehicle;

2. the front wheel positioning parameter has good production consistency due to unique structural characteristics, and can avoid the problems of tire drop and the like in the follow-up process;

3. due to the modular design, the subsequent vehicle type expansion development (such as lengthening of the wheelbase, increase of the wheel base and the like) is facilitated, and the development cost and the development period are reduced.

Description of the drawings:

FIG. 1 is a schematic view of a dual trailing arm suspension system of the present invention.

FIG. 2 is a side view of the dual trailing arm suspension system of the present invention.

FIG. 3 is a front view of the dual trailing arm suspension of the present invention.

FIG. 4 is a top view of the dual trailing arm suspension of the present invention.

The specific implementation mode is as follows:

the invention is further described below with reference to the accompanying drawings.

The invention discloses a double-trailing-arm suspension system, which comprises a steering driven axle 3, wherein the steering driven axle 3 comprises an axle pipe 11 and two trailing-arm supports 4 welded on the axle pipe 11 at intervals, each trailing-arm support 4 comprises an upper tail end extending above the axle pipe 11 and a lower tail end extending below the axle pipe 11, an upper trailing arm 1 is installed at the upper tail end of each trailing-arm support 4, and a lower trailing arm 2 is installed at the lower tail end of each trailing-arm support 4.

The upper trailing arm 1 and the lower trailing arm 2 are respectively composed of a connecting pipe 8, a lining pipe 9 and a buffer sleeve 10, wherein the lining pipe 9 comprises two buffer sleeves welded at the front end and the rear end of the connecting pipe 8, and the rubber-vulcanized buffer sleeves 10 are fixed in the lining pipe 9 through press fitting.

Bolts are arranged at the upper tail end and the lower tail end of the trailing arm support 4 in a penetrating mode, the bolts simultaneously penetrate through the buffer sleeve 10, and the upper trailing arm 1, the lower trailing arm 2 and the trailing arm support 4 are installed together through nuts respectively arranged at the two tail ends of the bolts. The cushion collar 10 is of a structure with large size and adjustable and optimized rigidity, and is beneficial to improving the bearing capacity.

The lengths of the upper longitudinal arm 1 and the lower longitudinal arm 2 are designed to be equal to form a parallelogram mechanism. Two ends of the upper longitudinal arm 1 and the lower longitudinal arm 2 are respectively connected with the steering driven axle 3 and the vehicle frame through a buffer sleeve 10.

The steering driven axle 3 makes up-and-down jumping under the guidance of the upper trailing arm 1 and the lower trailing arm 2. The trailing arm support 4 functions to alleviate impact load transmitted from the wheel in addition to carrying the weight of the chassis.

The outer sides of the two trailing arm supports 4 on the bridge pipe 11 are respectively welded with a strut support 14, a strut assembly 5 is mounted on the strut support 14, and the strut assembly 5 comprises a shock absorber 13 mounted together with the strut support 14 and a spiral spring 12 sleeved outside the shock absorber 13. One end of the shock absorber 13 is fixed to the strut mount 14 by bolts and nuts after being mounted together, and the shock absorber 13 and the strut mount 14 are mounted in a manner similar to that of the upper trailing arm 1 and the lower trailing arm 2 and the trailing arm mount 4, which is not described in detail herein.

The steering driven axle 3 further comprises a wheel-side brake assembly 6 and a main pin and knuckle arm 7, wherein the main pin and knuckle arm 7 is welded at two tail ends of the axle tube 11, and the wheel-side brake assembly 6 is mounted on the main pin and knuckle arm 7 through bolts.

The working principle of the double trailing arm type suspension system is as follows: the steering driven axle is hinged to two longitudinal arms of equal length and makes parallelogram motion under the guide of the longitudinal arms, and the column assembly with spiral spring structure is used as the elastic element and damping element of the suspension to transfer the vertical load between the axle and the frame and absorb energy via its deformation to reach the buffering aim.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.

Claims

1. A double trailing arm suspension system characterized by: including steering driven axle (3), steering driven axle (3) include bridge tube (11) and two trailing arm supports (4) of interval welding on bridge tube (11), trailing arm support (4) are including extending to the last end of bridge tube (11) top and extending to the lower end of bridge tube (11) below trailing arm support (4) last end installation of trailing arm support (4) lower trailing arm (2) are installed to the lower end of trailing arm support (4), the outside that lies in two trailing arm supports (4) on bridge tube (11) has welded pillar support (14) respectively, install pillar assembly (5) on pillar support (14), pillar assembly (5) include with pillar support (14) install in bumper shock absorber (13) together and overlap helical spring (12) of locating bumper shock absorber (13) outside.

2. The dual trailing arm suspension system of claim 1 wherein: go up trailing arm (1) and down trailing arm (2) and constitute by connecting pipe (8), bushing pipe (9) and cushion collar (10) triplex, bushing pipe (9) are including welding in two of connecting pipe (8) front and back terminal.

3. The dual trailing arm suspension system of claim 2 wherein: the buffer sleeve (10) is fixed in the liner tube (9) through press fitting.

4. The dual trailing arm suspension system of claim 3 wherein: bolts penetrate through the upper tail end and the lower tail end of the longitudinal arm support (4), the bolts penetrate through the buffer sleeve (10), and nuts are respectively installed at the two tail ends of the bolts so as to install the upper longitudinal arm (1), the lower longitudinal arm (2) and the longitudinal arm support (4) together.

5. The dual trailing arm suspension system of claim 4 wherein: the lengths of the upper longitudinal arm (1) and the lower longitudinal arm (2) are designed to be equal.

6. The dual trailing arm suspension system of claim 5 wherein: one end of the shock absorber (13) is fixed by a bolt and a nut after being mounted with the strut support (14).

7. The dual trailing arm suspension system of claim 6 wherein: the steering driven axle (3) further comprises a wheel side brake assembly (6) and a main pin and a steering knuckle arm (7), wherein the main pin and the steering knuckle arm (7) are welded at two tail ends of the axle tube (11).

8. The dual trailing arm suspension system of claim 7 wherein: the wheel-side brake assembly (6) is mounted on the kingpin and the knuckle arm (7) by bolts.