Front suspension structure of electric vehicle

Abstract

The utility model relates to the technical field of electric vehicle suspension, in particular to an electric vehicle front suspension structure which comprises a lower frame body, a middle frame body fixed to the top of the lower frame body, an upper frame body fixed to the top of the middle frame body, a steering gear box arranged on the lower frame body, pull rods in transmission connection with the two sides of the steering gear box, and a ball head at one end of each pull rod is connected with a claw. The connecting arm is arranged above the steel plate spring; a connecting arm ball head is connected with a balance rod; the other end of the balance rod is connected with an upper frame body ball head; a cleat bottom ball head is connected with a triangular arm, the triangular arm is hinged to the lower frame body, a damper is hinged to the top of the triangular arm, and the damper is hinged to the upper frame body; the steel plate spring, the triangular arm, the balance rod and the cleat restrain the wheel, so that the caster angle of a main pin of the wheel is 3 + / -0.5 degrees, the camber angle of the main pin is 1 + / -0.5 degrees, a left pull rod and a right pull rod of a steering gear are adjusted to ensure that the toe-in is 3-5mm, the driving performance and the stability of an automobile are improved, the front wheel is automatically returned after turning, side inclination is prevented, and tire abrasion deviation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle suspension technology, and in particular to a front suspension structure for an electric vehicle. Background Technology

[0002] The existing electric vehicles usually use a MacPherson strut suspension structure. The MacPherson strut suspension is a type of independent suspension and is one of the most common independent suspensions. It is generally used on the front wheels of cars.

[0003] The main structure of a MacPherson strut suspension consists of a coil spring and a shock absorber. The shock absorber can prevent the coil spring from shifting forward, backward, left, or right when it is under force, and restrict the spring to vibrate only in the up and down direction. The stiffness and performance of the suspension can be set by adjusting the length and tension of the shock absorber.

[0004] MacPherson strut suspension is compact in size and occupies little space, effectively expanding interior passenger space. It offers good responsiveness and handling, and its simple structure makes it suitable for mounting large engines on small car bodies. However, due to its overly simple straight-tube structure, it relies solely on the lower control arm and shock absorber strut to withstand strong wheel impacts, making it prone to geometric deformation. It lacks resistance to lateral impacts, has weak anti-roll and anti-dive capabilities, poor stability, low durability, and the shock absorbers are prone to oil leaks and require regular replacement.

[0005] This deformation manifests in the driving experience as a noticeable decrease in vehicle stability, especially noticeable body roll when cornering.

[0006] Therefore, this application provides a front suspension structure for electric vehicles to overcome the shortcomings of the prior art. Utility Model Content

[0007] The purpose of this invention is to solve the problems of existing MacPherson strut suspensions lacking resistance to impacts from both sides, poor roll resistance, and poor stability.

[0008] This utility model provides a front suspension structure for an electric vehicle, including a lower frame, a middle frame fixedly connected to the top of the lower frame, an upper frame fixedly connected to the top of the middle frame, a steering gear above the lower frame, a tie rod connected to each side of the steering gear, a steering horn connected to the ball joint at the end of each tie rod away from the steering gear, a leaf spring and a connecting arm connected to the top of the steering horn via a ball joint, the connecting arm being located above the leaf spring, a balance bar connected to the ball joint at the end of the connecting arm away from the steering horn, the other end of the balance bar being connected to the ball joint of the upper frame, a triangular arm connected to the ball joint at the bottom of the steering horn, a hinged end of the triangular arm away from the steering horn to the lower frame, one corner of the triangular arm being connected to the ball joint of the steering horn, and the other two corners being hinged to the lower frame, a damper hinged to the top of the triangular arm, and the top of the damper being hinged to the upper frame.

[0009] As a preferred technical solution, a support platform is fixed to the top of the lower frame, and the leaf spring is located on the top of the support platform. The support platform is equipped with two oppositely arranged connectors, which are inverted "U" shapes. The two connectors work together with the support platform to fix the leaf spring in place, preventing it from falling off and also preventing it from deforming to some extent. Two washers are provided on the top of the leaf spring, and these washers are placed between the leaf spring and the connectors to prevent it from falling off during operation. Bolts are installed on the leaf spring, and these bolts are connected to the support platform, which further prevents the leaf spring from falling off.

[0010] As a preferred technical solution, the support platform includes a first connecting beam, which is vertical. The bottom wall of the first connecting beam is fixedly connected to the top wall of the lower frame. A horizontal connecting plate is fixed on the top wall of the first connecting beam. Two oppositely arranged connecting parts are installed on the connecting plate. A steel leaf spring is placed on the top of the connecting plate. A second connecting beam is fixed on the side of the top wall of the connecting plate away from the first connecting beam. The top wall of the second connecting beam is fixedly connected to the bottom wall of the upper frame.

[0011] As a preferred technical solution, a support frame is also fixed to the top of the lower frame. The support frame is in the shape of an inverted "U". The steering gear is placed on the support frame. Two opposing pipe clamps are bolted to the top of the support frame. The pipe clamps and the top wall of the support frame form a space, and the steering gear is placed in this space.

[0012] As a preferred technical solution, a brake disc is bolted to the side of the ram's horn away from the lower frame, and a brake caliper is installed on the brake disc.

[0013] The beneficial effects of the electric vehicle front suspension structure provided by this utility model are:

[0014] This invention constrains the wheels by using leaf springs, triangular arms, stabilizer bars, and steering knuckles, resulting in a caster angle of 3°±0.5° and a camber angle of 1°±0.5°. By adjusting the left and right tie rods of the steering gear, the toe-in is maintained at 3-5mm, improving the straight-line driving performance and stability of the vehicle. It also promotes automatic return of the front wheels to center after turning, preventing body roll, reducing tire wear, and correcting the outward rotation of the wheels caused by the camber angle. When the steering wheels deflect due to an external force, they can automatically return to the straight driving position immediately after the force disappears, automatically returning to center and ensuring straight rolling without lateral slippage. This reduces tire wear, improves resistance to impacts from both sides, and enhances vehicle stability.

[0015] By installing dampers that are hinged at the top to the upper frame and at the bottom to the triangular arm, as well as connecting arms and stabilizer bars, the vehicle's shock absorption effect can be enhanced, and comfort can be improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a front view of an embodiment of the present utility model;

[0018] Figure 3 This is a left view of an embodiment of the present utility model;

[0019] Figure 4 This is a top view of an embodiment of the present utility model;

[0020] Figure 5 This is a front view of the support platform according to an embodiment of the present utility model;

[0021] Figure 6 This is a front view of the support frame according to an embodiment of the present utility model.

[0022] The components are as follows: 1. Lower frame; 2. Middle frame; 3. Upper frame; 4. Steering gear; 5. Tie rod; 6. Steering knuckle; 7. Leaf spring; 8. Connecting arm; 9. Stabilizer bar; 10. Brake disc; 11. Brake caliper; 12. Triangular arm; 13. Damper; 14. Bolt; 15. Support platform; 151. Connecting beam one; 152. Connecting plate; 153. Connecting beam two; 16. Connecting parts; 17. Gasket; 18. Support frame; 19. Pipe clamp. Detailed Implementation

[0023] To make the technical means, technical features, utility model purpose and technical effects of this utility model easy to understand, the present utility model will be further described below with reference to specific illustrations. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model. Example

[0024] like Figures 1 to 6 As shown: A front suspension structure for an electric vehicle includes a lower frame 1, a middle frame 2 fixedly connected to the top of the lower frame 1, an upper frame 3 fixedly connected to the top of the middle frame 2, a steering gear 4 disposed above the lower frame 1, and a tie rod 5 drivenly connected to each side of the steering gear 4. Each tie rod 5 has a ball joint connected to a steering knuckle 6 at its end away from the steering gear 4. A leaf spring 7 and a connecting arm 8 are connected to the top of the steering knuckle 6 via the ball joint. The connecting arm 8 is located on the leaf spring 7. Above, the ball end of the connecting arm 8 away from the ram's horn 6 is connected to a balance bar 9, and the other end of the balance bar 9 is connected to the ball end of the upper frame 3. The ball end of the ram's horn 6 is connected to a triangular arm 12, and the end of the triangular arm 12 away from the ram's horn 6 is hinged to the lower frame 1. One corner of the triangular arm 12 is connected to the ball end of the ram's horn 6, and the other two corners are hinged to the lower frame 1. The top of the triangular arm 12 is hinged to a damper 13, and the top of the damper 13 is hinged to the upper frame 3.

[0025] like Figures 1 to 5 As shown: A support platform 15 is fixed to the top of the lower frame 1. The leaf spring 7 is located on the top of the support platform 15. The support platform 15 is equipped with two oppositely arranged connectors 16. The connectors 16 are inverted "U" shape. The two connectors 16 work together with the support platform 15 to fix the leaf spring 7, preventing the leaf spring 7 from falling off and also preventing the leaf spring 7 from deforming to a certain extent. The top of the leaf spring 7 is provided with two washers 17. The two washers 17 are located between the leaf spring 7 and the connectors 16 to prevent the leaf spring 7 from falling off during operation. The leaf spring 7 is equipped with bolts 14, which are connected to the support platform 15, to further prevent the leaf spring 7 from falling off.

[0026] like Figure 5As shown: The support platform 15 includes a first connecting beam 151, which is vertical. The bottom wall of the first connecting beam 151 is fixedly connected to the top wall of the lower frame 1. A horizontal connecting plate 152 is fixed on the top wall of the first connecting beam 151. Two oppositely arranged connecting pieces 16 are installed on the connecting plate 152. The steel leaf spring 7 is placed on the top of the connecting plate 152. A second connecting beam 153 is fixed on the side of the top wall of the connecting plate 152 away from the first connecting beam 151. The top wall of the second connecting beam 153 is fixedly connected to the bottom wall of the upper frame 3.

[0027] like Figures 2 to 4 and Figure 6 As shown: A support frame 18 is also fixed to the top of the lower frame 1. The support frame 18 is inverted "U" shape. The steering gear 4 is placed on the support frame 18. The top bolt 14 of the support frame 18 connects two oppositely arranged pipe clamps 19. The pipe clamps 19 and the top wall of the support frame 18 form a space. The steering gear 4 is placed in this space. The pipe clamps 19 and the support frame 18 work together to fix the steering gear 4.

[0028] like Figures 1 to 4 As shown: The brake disc 10 is connected to the side of the ram horn 6 away from the lower frame 1 by bolts 14, and a brake caliper 11 is installed on the brake disc 10.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the content of the claims of the present utility model shall fall within the technical scope of the present utility model.

Claims

1. An electric vehicle front suspension structure, comprising a lower frame body (1), a middle frame body (2) fixedly connected to the top of the lower frame body (1), and an upper frame body (3) fixedly connected to the top of the middle frame body (2), characterized in that: The upper side of the lower frame body (1) is provided with a direction machine (4), the two sides of the direction machine (4) are each transmission connected with a pull rod (5), the one end of each pull rod (5) away from the direction machine (4) is ball head connected with a horn (6), the top of the horn (6) is ball head connected with a steel plate spring (7) and a connecting arm (8), the connecting arm (8) is arranged above the steel plate spring (7), the one end of the connecting arm (8) away from the horn (6) is ball head connected with a balance bar (9), the other end of the balance bar (9) is ball head connected with the upper frame body (3), the bottom of the horn (6) is ball head connected with a triangular arm (12), the one end of the triangular arm (12) away from the horn (6) is hinged with the lower frame body (1), the top of the triangular arm (12) is hinged with a damper (13), the top end of the damper (13) is hinged with the upper frame body (3).

2. The front suspension structure of an electric vehicle according to claim 1, characterized by: The top of the lower frame body (1) is fixedly provided with a support table (15), the steel plate spring (7) is arranged on the top of the support table (15), the support table (15) is provided with two oppositely arranged connecting pieces (16), the connecting piece (16) is inverted "U" type, the top of the steel plate spring (7) is provided with two gaskets (17), the two gaskets (17) are arranged between the steel plate spring (7) and the connecting piece (16), the steel plate spring (7) is provided with a bolt (14), and the bolt (14) is connected with the support table (15).

3. The front suspension structure of an electric vehicle according to claim 2, characterized by: The support table (15) comprises a connecting beam one (151), the connecting beam one (151) is vertical, the bottom wall of the connecting beam one (151) is fixedly connected with the top wall of the lower frame body (1), a horizontal connecting plate (152) is fixedly arranged on the top wall of the connecting beam one (151), two oppositely arranged connecting pieces (16) are arranged on the connecting plate (152), the steel plate spring (7) is arranged on the top of the connecting plate (152), a connecting beam two (153) is fixedly arranged on the side of the top wall of the connecting plate (152) away from the connecting beam one (151), and the top wall of the connecting beam two (153) is fixedly connected with the bottom wall of the upper frame body (3).

4. The front suspension structure of an electric vehicle according to claim 1, characterized by: The top of the lower frame body (1) is further fixedly provided with a support frame (18), the support frame (18) is inverted "U" type, the direction machine (4) is arranged on the support frame (18), two oppositely arranged pipe clamps (19) are connected with the top of the support frame (18) through bolts (14), the pipe clamps (19) and the top wall of the support frame (18) form a space, and the direction machine (4) is arranged in the space.

5. The front suspension structure of an electric vehicle according to claim 1, characterized by: The side of the horn (6) away from the lower frame body (1) is connected with a brake disc (10) through bolts (14), and the brake disc (10) is provided with a brake caliper (11).

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