Guide arm for automobile

Abstract

The utility model discloses a guide arm for an automobile, which relates to the technical field of guide arms, and comprises a guide arm main body, a bending part, a rolling lug part, a bending part and a connecting platform, the bending part is arranged on one side of the guide arm main body, the section of the bending part is arc-shaped, the rolling lug part is arranged at the end part of the bending part, the bending part is arranged on the other side of the bending part, and the connecting platform is connected with the bending part. And the connecting platform is fixedly connected with the bending part. According to the guide arm, the arrangement mode that the guide arm body, the bent part, the lug winding part, the bent part and the connecting platform are matched is utilized, the bent part and the lug winding part are not located on the same horizontal line, and the bent part has the bending trend of tilting upwards from the straight part, so that a height difference is formed between the axis of the lug winding part and the upper surface of the guide arm body; and the displacement of the axle in the vehicle advancing direction can be greatly reduced, meanwhile, the force and torque borne by the guide arm can be greatly reduced, and the stability of the guide arm in the vehicle running process is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of guide arm technology, and in particular to a guide arm for automobiles. Background Technology

[0002] The guide arm is a key component of the automotive suspension system. It is connected to the frame at one end, the axle in the middle, and the airbag at the other end. Its main function is to transmit longitudinal and lateral forces, ensuring that the wheels move along a predetermined trajectory. It can effectively buffer road impacts and improve ride comfort when the vehicle is in motion. At the same time, it can also restrain the relative movement between the axle and the frame, maintain vehicle stability, and has a positive impact on the precision of steering and braking operations. It is of great significance in ensuring the safe and stable operation of the vehicle.

[0003] The existing automotive guide arm connects the vehicle frame and the airbag, and the guide arm is a straight single leaf spring. As a result, the installation connection point between the guide arm bracket and the guide arm is far from the center of the axle in the vehicle height direction, which causes the axle to move significantly in the forward direction of the vehicle and interferes greatly with the movement trajectory of the axle in the vehicle width direction. At the same time, the guide arm bears a large horizontal force and torque from the center of the axle, which makes the connecting bolts between the guide arm and the axle unstable. As the vehicle is running, the bolts are prone to come loose, increasing the driving danger of the vehicle. Utility Model Content

[0004] The purpose of this invention is to provide a guide arm for automobiles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a guide arm for automobiles, comprising:

[0006] Guide arm body;

[0007] A curved section is provided on one side of the guide arm body, and the cross-section of the curved section is arc-shaped;

[0008] The rolled ear portion has a curved end portion;

[0009] A bend, wherein the bend is disposed on the other side of the bend;

[0010] A connecting platform is fixedly connected to the bending part, and the connecting platform is provided with connecting holes for connecting airbags at equal intervals.

[0011] Preferably, a blind hole is provided in the middle of the guide arm body, the blind hole is used to connect the axle, the blind hole is 30mm long and 20mm wide, and both sides of the blind hole are semi-circular.

[0012] Preferably, the guide arm body has symmetrical clearance grooves on both sides, which are used to avoid bolts used for mounting the axle.

[0013] Preferably, grooves are provided on both sides of the rolled ear portion, the distance between the inner walls of the grooves is 100±0.3mm, and the vertical distance between the center of the rolled ear portion and the bottom end of the guide arm body is 180~210mm.

[0014] Preferably, the cross-section of the bent portion is S-shaped, the outer radius between the bent portion and the connecting platform is 30mm, and the inner radius between the bent portion and the guide arm body is 25mm.

[0015] Preferably, the guide arm body is parallel to the connecting platform in the horizontal direction, the diameter of the center circle of the connecting hole is 200±0.15mm, and the blind hole is 65mm away from the center circle of the connecting hole in the horizontal direction.

[0016] Preferably, the angle between the guide arm body and the connecting platform is 164°, and the vertical height of the connecting platform gradually decreases from the bent part to the end of the connecting platform.

[0017] Preferably, the horizontal distance between the centers of two adjacent connecting holes on the connecting platform is 52mm, and the end of the connecting platform is formed by an arc-shaped surface with a radius of 127.5mm.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] This invention utilizes a combination of a guide arm body, a curved section, a rolled ear section, a bent section, and a connecting platform. The curved section and the rolled ear section are not located on the same horizontal line. The curved section has a tendency to curve upwards from the straight section, creating a height difference between the axis of the rolled ear section and the upper surface of the guide arm body. This height difference makes the axis of the rolled ear section approximately at the same horizontal level as the center point of the axle. The existence of this height difference makes the installation position approximately horizontal with the center point of the axle, which can greatly reduce the amount of axle movement in the vehicle's forward direction, reduce the amount of interference of the axle in the vehicle's forward direction and width direction, and at the same time greatly reduce the force and torque on the guide arm, ensuring the stability of the guide arm during vehicle operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model from a bottom view.

[0022] Figure 3 This is a top view of the internal structure of the rolled ear part of this utility model.

[0023] In the diagram: 1. Guide arm body; 2. Bending part; 3. Ear-shaped part; 4. Bending part; 5. Connecting platform; 6. Connecting hole; 7. Blind hole; 8. Clearance groove; 9. Groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figure 1-3 The guide arm shown includes a guide arm body 1, a curved portion 2, a coiled portion 3, a bent portion 4, and a connecting platform 5. The curved portion 2 is located on one side of the guide arm body 1, and the cross-section of the curved portion 2 is arc-shaped. The coiled portion 3 is located at the end of the curved portion 2. The bent portion 4 is located on the other side of the curved portion 2. The connecting platform 5 is fixedly connected to the bent portion 4, and connecting holes 6 for connecting airbags are equidistantly provided on the connecting platform 5. The curved portion 2 and the coiled portion 3 are not located on the same horizontal line. The curved portion 2 has a bend that curves upwards from a straight portion. The curved trend creates a height difference between the axis of the ear portion 3 and the upper surface of the guide arm body 1. This height difference makes the axis of the ear portion 3 approximately at the same horizontal level as the center point of the axle. The existence of this height difference makes the installation position approximately horizontal with the center point of the axle, which can greatly reduce the amount of axle movement in the vehicle's forward direction, reduce the amount of interference of the axle in the vehicle's forward direction and width direction, and at the same time greatly reduce the force and torque on the guide arm, ensuring the stability of the guide arm during vehicle operation.

[0026] Furthermore, a blind hole 7 is provided in the middle of the guide arm body 1. The blind hole 7 is used to connect the axle. The blind hole 7 is 30mm long and 20mm wide, and both sides of the blind hole 7 are semi-circular. The blind hole 7 has a racetrack-like design. The semi-circular ends can effectively eliminate stress concentration at right angles and avoid crack propagation at the hole edge due to repeated loads. The elongated hole design disperses the longitudinal force transmitted by the axle through a larger longitudinal contact area, such as the impact during acceleration or braking, while limiting lateral displacement to maintain stability. Secondly, this structure provides a small lateral displacement space, which is convenient for aligning bolts and compensating for manufacturing tolerances during assembly. It can also adapt to slight deformation of the axle during driving and reduce the risk of metal fatigue caused by rigid connections. In addition, the semi-circular end fits tightly with the cylindrical bolt or bushing to prevent the bolt from loosening and enhance shear resistance. It is especially suitable for use with rubber or hydraulic bushings, which can improve the shock absorption effect and facilitate later maintenance and replacement. Compared with pure circular holes, oblong holes reduce the amount of material used while ensuring strength, achieving a lightweight design. It is particularly suitable for non-independent suspension axles or heavy vehicles, allowing the axle to swing slightly during bumps to reduce the impact on the guide arm.

[0027] Furthermore, the guide arm body 1 has symmetrical clearance grooves 8 on both sides. The clearance grooves 8 are used to avoid the bolts of the axle, ensuring balance and stability during assembly and avoiding uneven stress caused by unilateral clearance. Secondly, the clearance grooves 8 provide precise accommodation space for the axle bolt heads or nuts, ensuring that the bolts are fully tightened without interfering with the surrounding structure, especially achieving a compact layout in a narrow space. Moreover, the grooves allow the use of larger installation tools, significantly improving the convenience of assembly and subsequent maintenance.

[0028] Furthermore, grooves 9 are provided on both sides of the rolled ear portion 3. The distance between the inner walls of the grooves 9 is 100±0.3mm. The double-sided symmetrical groove structure ensures precise alignment and installation with connecting components, such as shock absorbers or stabilizer bars. The high tolerance control of ±0.3mm effectively avoids assembly interference and provides a stable clamping space for bolts or bushings. The vertical distance between the center of the rolled ear portion 3 and the bottom end of the guide arm body 1 is 180~210mm. The vertical distance design of 180~210mm meets the suspension geometry parameters, ensures the matching efficiency of the shock absorber and spring, and leaves a reasonable margin for the chassis ground clearance.

[0029] Furthermore, the cross-section of the bending section 4 is S-shaped. The outer radius between the bending section 4 and the connecting platform 5 is 30mm, and the inner radius between the bending section 4 and the guide arm body 1 is 25mm. The S-shaped curve effectively disperses stress concentration through a gradual transition, improving fatigue life. Secondly, the 30mm outer radius ensures a smooth transition with the connecting platform 5, providing sufficient operating space and structural strength for welding or bolting connections. The 25mm inner radius maximizes material utilization within a limited space, achieving a balance between lightweight and rigidity. Moreover, this asymmetric radius design forms an optimized force transmission path, allowing longitudinal impact force to be naturally converted into elastic deformation through the S-shaped curve, which not only buffers road vibration but also maintains sufficient lateral support stiffness.

[0030] Furthermore, the guide arm body 1 is parallel to the connecting platform 5 in the horizontal direction. The diameter of the center circle of the connecting hole 6 is 200±0.15mm, and the blind hole 7 is 65mm away from the center circle of the connecting hole 6 in the horizontal direction. The parallel structure ensures the straightness of the load transmission path, so that the impact force can be efficiently distributed to the subframe in the horizontal direction, avoiding additional bending moment caused by angular deviation. Secondly, the precision center circle diameter of 200±0.15mm not only ensures zero interference assembly with the subframe bolt group, but its sub-millimeter tolerance control also makes the force on each connection point uniform, extending the service life of the bushing. Furthermore, the 65mm horizontal spacing design creates the optimal lever arm ratio, which provides sufficient installation rigidity to resist longitudinal impacts, such as braking torque, and optimizes the suspension geometry characteristics, such as anti-nose angle, through precise leverage effect. At the same time, it is easy to expand the modular platform, and the same guide arm can be adapted to different wheelbase models.

[0031] Furthermore, the guide arm body 1 and the connecting platform 5 have an angle of 164°. This specific angle design of 164° ensures structural compactness while creating an optimal force transmission path for the suspension system, allowing longitudinal impact force to be smoothly converted into elastic deformation. This effectively buffers road vibrations and avoids stress concentration caused by an excessively small angle. The vertical height of the connecting platform 5 gradually decreases from the bend 4 to the end of the connecting platform 5. The gradual height design of the connecting platform 5 forms an optimized equal-strength beam structure, which reduces weight while ensuring the rigidity of key connection parts. Its tapered profile provides ample operating space for welding or bolting connections and achieves a natural transition of stress flow through progressive cross-sectional changes, reducing the risk of fatigue fracture.

[0032] Furthermore, the horizontal distance between the centers of two adjacent connecting holes 6 on the connecting platform 5 is 52mm. The end of the connecting platform 5 is opened into an arc-shaped surface with a radius of 127.5mm. The arc-shaped surface can distribute stress more evenly, avoid stress concentration at sharp corners or edges, enhance the structural strength and durability of the connecting platform 5, and reduce damage and fatigue cracks caused by stress concentration.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A guide arm for automobiles, characterized in that, include: Guide arm body (1); A curved section (2) is provided on one side of the guide arm body (1), and the cross section of the curved section (2) is arc-shaped; The ear-shaped portion (3) is provided with the end of the curved portion (2); A bend (4) is provided on the other side of the bend (2); A connecting platform (5) is fixedly connected to the bending part (4), and connecting holes (6) for connecting airbags are provided at equal intervals on the connecting platform (5).

2. A guide arm for an automobile according to claim 1, characterized in that, The guide arm body (1) has a blind hole (7) in the middle. The blind hole (7) is used to connect the axle. The blind hole (7) is 30mm long and 20mm wide. Both sides of the blind hole (7) are semi-circular.

3. A guide arm for an automobile according to claim 1, characterized in that, The guide arm body (1) has symmetrical clearance grooves (8) on both sides, which are used to avoid the bolts for installing the axle.

4. A guide arm for an automobile according to claim 1, characterized in that, The ear section (3) has grooves (9) on both sides. The distance between the inner walls of the grooves (9) is 100±0.3mm. The vertical distance between the center of the ear section (3) and the bottom of the guide arm body (1) is 180~210mm.

5. A guide arm for an automobile according to claim 1, characterized in that, The cross-section of the bent part (4) is S-shaped. The outer radius between the bent part (4) and the connecting platform (5) is 30mm, and the inner radius between the bent part (4) and the guide arm body (1) is 25mm.

6. A guide arm for an automobile according to claim 2, characterized in that, The guide arm body (1) is parallel to the connecting platform (5) in the horizontal direction. The diameter of the center circle of the connecting hole (6) is 200±0.15mm. The blind hole (7) is 65mm away from the center circle of the connecting hole (6) in the horizontal direction.

7. A guide arm for an automobile according to claim 1, characterized in that, The guide arm body (1) and the connecting platform (5) have an angle of 164°, and the vertical height of the connecting platform (5) gradually decreases from the bent part (4) to the end of the connecting platform (5).

8. A guide arm for an automobile according to claim 1, characterized in that, The horizontal distance between the centers of two adjacent connecting holes (6) on the connecting platform (5) is 52mm. The end of the connecting platform (5) is opened into an arc surface with a radius of 127.5mm.

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