Front independent suspension system of four-wheel electric vehicle

Abstract

The front independent suspension system of the four-wheel electric vehicle comprises two wheel assemblies and a frame, and two sets of independent front suspensions are arranged on the front portion of the frame in a bilateral symmetry mode. The single-group independent front suspension at least comprises a hub steering knuckle, a shock absorber and a lower swing arm; a hub of the wheel assembly is rotationally mounted on the hub steering knuckle through a bearing; a lower connecting seat is integrally arranged at the lower end of the hub knuckle; the inclined upper end of the lower swing arm is hinged to the lower side of the front part of the frame through a hinge a; the inclined lower end of the lower swing arm is connected with a lower connecting seat through a spherical hinge; the driving stability and comfort of the vehicle are improved; and meanwhile, different road conditions can be adapted.

Description

Technical Field

[0001] The invention belongs to the field of four-wheel vehicle suspension. Background Art

[0002] The rigidity of traditional suspension systems is limited, which can easily cause large bumps in the vehicle during driving. Once a component has a problem, it may affect the performance of the entire suspension system. The independent front suspension structure came into being to solve the problems of traditional suspension systems. By adopting an independent suspension design, the independent movement of the front suspension system can be achieved, improving the vehicle's driving stability and driving comfort. However, independent suspension has problems such as weak roll suppression and unadjustable roll suppression. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a front independent suspension system for a four-wheel electric vehicle, which improves the driving stability and comfort of the vehicle and can adapt to different road conditions.

[0004] Technical solution: To achieve the above-mentioned purpose, a front independent suspension system of a four-wheel electric vehicle of the present invention comprises two wheel assemblies and a frame, and two sets of independent front suspensions are symmetrically arranged on the front part of the frame; a single set of independent front suspension comprises at least a wheel hub knuckle, a shock absorber and a lower swing arm; the wheel hub of the wheel assembly is rotatably mounted on the wheel hub knuckle through a bearing; a lower connecting seat is integrally provided at the lower end of the wheel hub knuckle, and the oblique upper end of the lower swing arm is hingedly connected to the lower side of the front part of the frame through a hinge; the oblique lower end of the lower swing arm is connected to the lower connecting seat through a ball joint.

[0005] Furthermore, the upper end of the shock absorber is connected to the vehicle frame; a rotating drum is coaxially rotatably mounted on the rod portion at the lower end of the shock absorber, and a connecting seat is integrally provided on one side of the rotating drum close to the wheel hub.

[0006] Furthermore, an upper hinge seat is integrally provided at the upper end of the wheel hub steering knuckle, the upper hinge seat is hingedly connected to the oblique lower end of the oblique upper arm, the oblique upper end of the oblique upper arm is integrally connected to the fixed arm, and two a nodes at both ends of the fixed arm are detachably connected to two b nodes on the connecting seat through bolt locking members, so that the connecting seat is synchronized with the oblique upper arm;

[0007] Furthermore, the shock absorber is a coil spring tube type shock absorber.

[0008] Furthermore, the lower control arm is an A-shaped lower control arm.

[0009] Furthermore, a steering arm extending forward is integrally provided on the front side of the wheel hub steering knuckle, the end of the steering arm is fixedly connected to the vertical arm via a fixed connector, and the upper end of the vertical arm is hingedly connected to the end of the lateral steering tie rod via a steering ball joint.

[0010] Furthermore, a vertical hydraulic telescopic compensator is fixedly installed in the middle of the front end of the frame, and the lower end of the hydraulic telescopic compensator is a lifting part that can move up and down; two catenary steel cables are symmetrically arranged on the left and right sides of the lifting part, and the two catenary steel cables correspond to two groups of independent front suspensions symmetrically arranged on the left and right sides of the front part of the frame; the right end of a catenary steel cable on the left is fixedly connected to one side of the lifting part, and the left end is fixedly connected to the waist of the lower arm of the left independent front suspension. In the initial state, the catenary steel cable is in the shape of a catenary arc with a naturally downward convex middle part, and the two ends of the catenary steel cable are at the same height.

[0011] When the four-wheel vehicle is expected to be subjected to a short-term excessively large uneven load on the left and right sides, the lifting part is controlled to extend downward in advance before receiving the load.

[0012] Beneficial effects: The present invention has a simple structure: the suspension is composed of a coil spring, a shock absorber and an A-shaped lower arm, has a simple structure, is easy to install and maintain, improves the driving stability and comfort of the vehicle; and can adapt to different road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall structure diagram;

[0014] Figure 2 for Figure 1 A front view of

[0015] Figure 3 for Figure 2 The left side enlarged schematic diagram;

[0016] Figure 4 for Figure 3 Disassembly diagram of

[0017] Figure 5 For Figure 2 Schematic diagram of the further expanded structure based on . DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] As attached Figures 1 to 4 A front independent suspension system of a four-wheel electric vehicle shown in the figure comprises a frame 2, and two sets of independent front suspensions 1 are symmetrically arranged on the front part of the frame 2; the single set of independent front suspension 1 comprises at least a wheel hub knuckle 14, a shock absorber 3 and a lower swing arm 13; the wheel hub of the wheel assembly is rotatably mounted on the wheel hub knuckle 14 through a bearing; the upper end of the shock absorber 3 is connected to the frame 2; a rotating drum 16 is rotatably mounted on the lower end rod portion 31 of the shock absorber 3 coaxially, and a connecting seat 4 is integrally arranged on the side of the rotating drum 16 close to the wheel hub.

[0020] An upper hinge seat 15 is integrally provided at the upper end of the wheel hub steering knuckle 14, and the upper hinge seat 15 is hingedly connected to the oblique lower end of the oblique upper arm 7, and the oblique upper end of the oblique upper arm 7 is integrally connected to a fixed arm 19, and two a nodes 17 at both ends of the fixed arm 19 are detachably connected to two b nodes 18 on the connecting seat 4 through bolt locking members, so that the connecting seat 4 is synchronized with the oblique upper arm 7; a lower connecting seat 11 is integrally provided at the lower end of the wheel hub steering knuckle 14, and the oblique upper end of the lower swing arm 13 is hingedly connected to the lower side of the front part of the frame 2 through an a hinge 41; the oblique lower end of the lower swing arm 13 is connected to the lower connecting seat 11 through a ball joint 12; the shock absorber 3 is a coil spring cylinder shock absorber; and the lower swing arm 13 is an A-shaped lower swing arm.

[0021] A steering arm 10 extending forward is integrally provided on the front side of the wheel hub steering knuckle 14 , the end of the steering arm 10 is fixedly connected to a vertical arm 8 via a fixed connector 9 , and the upper end of the vertical arm 8 is hingedly connected to the end of a transverse steering tie rod 5 via a steering ball joint 6 .

[0022] The above structure has the characteristics of simple structure. The suspension consists of coil springs, shock absorbers and A-shaped lower arm, which is easy to install and maintain. It improves the driving stability and comfort of the vehicle, can adapt to different road conditions, and provides a better driving experience. It effectively reduces the vibration and noise of the vehicle during driving and improves the riding comfort. 5. Good grip performance: Due to its good handling, the McPherson suspension can provide better grip performance.

[0023] Based on the above independent suspension, this solution also expands the following structure: Figure 5 As shown, a vertical hydraulic telescopic compensator 22 is fixedly installed in the middle of the front end of the frame 2, and the lower end of the hydraulic telescopic compensator 22 is a lifting part 21 that can move up and down; two catenary cables 20 are symmetrically arranged on the left and right sides of the lifting part 21, and the two catenary cables 20 correspond to the two groups of independent front suspensions 1 symmetrically arranged on the left and right sides of the front part of the frame 2; the right end of a catenary cable 20 on the left is fixedly connected to one side of the lifting part 21, and the left end is fixedly connected to the waist of the lower swing arm 13 of the left independent front suspension 1. In the initial state, the catenary cable 20 is in the shape of a catenary arc with a natural downward convexity in the middle, and the two ends of the catenary cable 20 are at the same height; the left end of a catenary cable 20 on the right is fixedly connected to one side of the lifting part 21, and the right end is fixedly connected to the waist of the lower swing arm 13 of the right independent front suspension 1. In the initial state, the catenary cable 20 on the right is in the shape of a catenary arc with a natural downward convexity in the middle; and the two ends of the catenary cable 20 are at the same height.

[0024] When the four-wheel vehicle is driving normally, cornering normally, or bumping normally, the catenary cable 20 is always in a non-tensioned and relaxed state, and does not hinder the normal function of the suspension. When there is an excessive roll tendency on one side of the vehicle, such as an unexpected sharp turn, serious uneven load on the left and right sides of the vehicle body, or an unexpected deep pit, the catenary cable 20 is straightened when the lower arm 13 swings up to a certain extent, thereby rigidly suppressing the roll; the threshold value of the rigid roll can be adjusted by the lifting and lowering movement of the lifting part 21; this structure has more functions with imagination space to be developed, such as when the four-wheel vehicle is expected to be subjected to excessive uneven loads on the left and right sides for a short time, for example, in the initial stage of stacking goods on the vehicle, To cause uneven load, before receiving the load, the lifting part 21 can be controlled to extend downward in advance, so that the two catenary cables 20 in the catenary state tend to be straightened first (not completely straightened). At this time, as long as the strength of the catenary cables 20 is sufficient, the tilting during the stacking stage can be rigidly suppressed. At this time, even if the loads on both sides of the four-wheel vehicle are seriously uneven, it will not tilt. After the stacked goods are evenly stacked on the vehicle manually, the lifting part 21 is controlled to move downward to a normal state. In addition, it also has the function of locking the vehicle. When in the parking state, the lifting part 21 is controlled to extend downward in advance, so that the two catenary cables 20 in the catenary state are completely tightened, so as to achieve the function of locking the vehicle. Not only that, this structure has greater room for imagination.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A front independent suspension system for a four-wheel electric vehicle, characterized in that: The invention comprises two wheel assemblies and a vehicle frame (2), wherein the front part of the vehicle frame (2) is symmetrically provided with two groups of independent front suspensions (1); a single group of the independent front suspension (1) comprises at least a wheel hub knuckle (14), a shock absorber (3) and a lower swing arm (13); the wheel hub of the wheel assembly is rotatably mounted on the wheel hub knuckle (14) via a bearing; a lower connecting seat (11) is integrally provided at the lower end of the wheel hub knuckle (14); the oblique upper end of the lower swing arm (13) is hingedly connected to the lower side of the front part of the vehicle frame (2) via a hinge (41); the oblique lower end of the lower swing arm (13) is connected to the lower connecting seat (11) via a ball joint (12).

2. The front independent suspension system of a four-wheel electric vehicle according to claim 1, characterized in that: The upper end of the shock absorber (3) is connected to the vehicle frame (2); a rotating drum (16) is coaxially rotatably mounted on the lower rod portion (31) of the shock absorber (3); and a connecting seat (4) is integrally provided on one side of the rotating drum (16) close to the wheel hub.

3. The front independent suspension system of a four-wheel electric vehicle according to claim 2, characterized in that: An upper hinge seat (15) is integrally provided at the upper end of the wheel hub steering knuckle (14), and the upper hinge seat (15) is hingedly connected to the oblique lower end of the oblique upper arm (7), and the oblique upper end of the oblique upper arm (7) is integrally connected to a fixed arm (19), and two a nodes (17) at both ends of the fixed arm (19) are detachably connected to two b nodes (18) on the connecting seat (4) via bolt locking members, so that the connecting seat (4) and the oblique upper arm (7) are synchronized.

4. The front independent suspension system of a four-wheel electric vehicle according to claim 2, characterized in that: The shock absorber (3) is a spiral spring cylinder type shock absorber.

5. The front independent suspension system of a four-wheel electric vehicle according to claim 4, characterized in that: The lower swing arm (13) is an A-shaped lower swing arm.

6. The front independent suspension system of a four-wheel electric vehicle according to claim 5, characterized in that: A steering arm (10) extending forward is integrally provided on the front side of the wheel hub steering knuckle (14); the end of the steering arm (10) is fixedly connected to a vertical arm (8) via a fixed connector (9); the upper end of the vertical arm (8) is hingedly connected to the end of a transverse steering tie rod (5) via a steering ball joint (6).

7. The front independent suspension system of a four-wheel electric vehicle according to claim 3, characterized in that: A vertical hydraulic telescopic compensator (22) is fixedly installed in the middle of the front end of the frame (2), and the lower end of the hydraulic telescopic compensator (22) is a lifting part (21) that can move up and down; two catenary steel cables (20) are symmetrically arranged on the left and right sides of the lifting part (21), and the two catenary steel cables (20) correspond to two groups of independent front suspensions (1) symmetrically arranged on the left and right sides of the front part of the frame (2); the right end of a catenary steel cable (20) on the left side is fixedly connected to one side of the lifting part (21), and the left end is fixedly connected to the waist of the lower swing arm (13) of the left independent front suspension (1). In the initial state, the catenary steel cable (20) is in the shape of a catenary arc with a naturally downward convex middle part, and the two ends of the catenary steel cable (20) are at the same height.

8. The working method of the front independent suspension system of a four-wheel electric vehicle according to claim 3, characterized in that: When the four-wheel vehicle is expected to be subjected to a short-term excessively large uneven load on the left and right sides, the lifting part (21) is controlled to extend downward in advance before receiving the load.

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