Front independent suspension system of a four-wheel electric vehicle

Abstract

The present invention discloses a front independent suspension system for a four-wheeled electric vehicle, comprising two wheel assemblies and a frame, wherein two groups of independent front suspensions are symmetrically arranged on the front of the frame; a single group of independent front suspensions comprises at least a wheel hub steering knuckle, a shock absorber and a lower swing arm; the wheel hub of the wheel assembly is rotatably mounted on the wheel hub steering knuckle via a bearing; a lower connecting seat is integrally provided at the lower end of the wheel hub steering knuckle, the oblique upper end of the lower swing arm is hingedly connected to the lower side of the front of the frame via an A hinge; the oblique lower end of the lower swing arm is connected to the lower connecting seat via a ball joint; the driving stability and comfort of the vehicle are improved, and the vehicle can adapt to different road conditions.

Description

Technical Field

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

[0002] The traditional suspension system has limited stiffness, which can easily cause the vehicle to experience large bumps during driving. Once a component has a problem, it may affect the performance of the entire suspension system. The front independent suspension structure of the vehicle came into being to solve the problems existing in the traditional suspension system; by adopting an independent suspension design, the independent movement of the front suspension system can be achieved, thereby improving the vehicle's driving stability and driving comfort; however, the independent suspension has problems such as weak roll suppression force and unadjustable roll suppression force. 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-wheeled electric vehicle, which improves the vehicle's driving stability and comfort; at the same time, it can adapt to different road conditions.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides a front independent suspension system for a four-wheel electric vehicle, comprising two wheel assemblies and a frame, with two sets of independent front suspensions symmetrically arranged on the left and right sides of the front of the frame; a single set of independent front suspension comprises at least a hub steering knuckle, a shock absorber and a lower control arm; the hub of the wheel assembly is rotatably mounted on the hub steering knuckle through a bearing; a lower connecting seat is integrally provided at the lower end of the hub steering knuckle, and the oblique upper end of the lower control arm is hingedly connected to the lower side of the front of the frame through a hinge; the oblique lower end of the lower control 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 mounted on the rod portion of the lower end of the shock absorber, and a connecting seat is integrally provided on the 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 nodes a at both ends of the fixed arm are detachably connected to two nodes b on the connecting seat by bolt locking members, thereby synchronizing the connecting seat 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 through a fixed connector, and the upper end of the vertical arm is hingedly connected to the end of the transverse steering rod through 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 cables are symmetrically arranged on the left and right sides of the lifting part, and the two catenary cables correspond to the two sets of independent front suspensions symmetrically arranged on the left and right sides of the front of the frame; the right end of the left catenary cable 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 cable is in the shape of a catenary arc with a naturally downward convex middle part, and the two ends of the catenary cable are at the same height.

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

[0012] Beneficial effects: The present invention has a simple structure: the suspension consists 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 Front view of

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

[0016] Figure 4 for Figure 3 Disassembly diagram;

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

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

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

[0020] The upper end of the wheel hub steering knuckle 14 is integrally provided with an upper hinge seat 15, which is hingedly connected to the oblique lower end of the oblique upper arm 7. The oblique upper end of the oblique upper arm 7 is integrally connected to a fixed arm 19. The two a nodes 17 at both ends of the fixed arm 19 are detachably connected to the two b nodes 18 on the connecting seat 4 through bolt locking parts, so that the connecting seat 4 is synchronized with the oblique upper arm 7; the lower end of the wheel hub steering knuckle 14 is integrally provided with a lower connecting seat 11, 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 tube shock absorber; the lower swing arm 13 is an A-shaped lower swing arm.

[0021] The front side of the wheel hub steering knuckle 14 is integrally provided with a steering arm 10 extending forward. The end of the steering arm 10 is fixedly connected to the vertical arm 8 through a fixed connector 9. The upper end of the vertical arm 8 is hingedly connected to the end of the transverse steering rod 5 through 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 arms. It is easy to install and maintain, which improves the vehicle's driving stability and comfort. It can adapt to different road conditions and provide a better driving experience. It effectively reduces the vibration and noise of the vehicle during driving, improves ride comfort, and has good grip performance: Due to its good handling, the McPherson suspension can provide better grip performance.

[0023] On the basis of the above-mentioned independent suspension, this solution also expands the following structures: 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 of the frame 2; the right end of the left catenary cable 20 is fixedly connected to one side of the lifting part 21, and the left end is fixedly connected to the waist of the lower control 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 the right catenary cable 20 is fixedly connected to one side of the lifting part 21, and the right end is fixedly connected to the waist of the lower control arm 13 of the right independent front suspension 1. In the initial state, the right 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.

[0024] When the four-wheel vehicle is driving normally, cornering normally, or experiencing normal bumps, the catenary cable 20 of the catenary cable structure is always in a non-tensioned and relaxed state, and does not hinder the normal function of the suspension. When there is an excessive tendency for one side of the vehicle to roll, such as unexpected sharp turns, serious uneven load on the left and right sides of the vehicle body, or passing through unexpected deep potholes, 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 movement of the lifting part 21; this structure has more imaginative functions to be developed, such as when the four-wheel vehicle is expected to be subjected to excessively large 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 stacked evenly 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 fully tightened, thereby achieving 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 principles 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 by: The invention comprises two wheel assemblies and a vehicle frame (2), wherein two groups of independent front suspensions (1) are symmetrically arranged on the front of the vehicle frame (2); 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 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); The upper end of the shock absorber (3) is connected to the vehicle frame (2); a rotating drum (16) is coaxially mounted on the lower end rod portion (31) of the shock absorber (3); a connecting seat (4) is integrally provided on a side of the rotating drum (16) close to the wheel hub; The upper end of the wheel hub steering knuckle (14) is integrally provided with an upper hinge seat (15), the upper hinge seat (15) is hingedly connected to the oblique lower end of the oblique upper arm (7), 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) and the oblique upper arm (7) are synchronized; 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); A vertical hydraulic telescopic compensator (22) is fixedly installed in the middle of the front end of the vehicle 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) respectively correspond to two groups of independent front suspensions (1) symmetrically arranged on the left and right sides of the front part of the vehicle 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 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.

2. The front independent suspension system of a four-wheel electric vehicle according to claim 1, characterized in that: The shock absorber (3) is a coil spring cylinder type shock absorber.

3. The front independent suspension system of a four-wheel electric vehicle according to claim 2, characterized in that: The lower swing arm (13) is an A-shaped lower swing arm.

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

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