Trailing arm structure and vehicle

Abstract

The utility model relates to the field of suspension control arm parts, and discloses a trailing arm structure and a vehicle. The trailing arm structure comprises a trailing arm body, the trailing arm body is of a cavity box body structure; one end of the trailing arm body is provided with a bushing and is connected with a vehicle body or a vehicle body bracket through the bushing; a steering knuckle connecting part is arranged at the other end of the trailing arm body, and a steering knuckle is assembled and connected to the steering knuckle connecting part; the trailing arm body comprises a first trailing arm plate body and a second trailing arm plate body which are arranged in parallel; the plate body edges of the first trailing arm plate body and the second trailing arm plate body are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body and the second trailing arm plate body. According to the structure, the structural strength of the rear trailing arm assembly is greatly improved, and the service life of the rear trailing arm assembly is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the field of suspension control arm parts, in particular to a trailing arm structure and a vehicle. Background Technique

[0002] The trailing arm structure is a main component of the rear suspension of an automobile. It mainly connects the vehicle body and the steering knuckle structure, transmits the forces and torques decomposed from the whole vehicle, and ensures that the wheels move along the designed trajectory, playing a certain guiding role. The trailing arm structure and other rear suspension control arms are the main load-bearing components of the multi-link suspension, and the trailing arm structure is required to have high structural strength to meet its working environment. Therefore, the rear trailing arm assembly plays a very important role in the vehicle suspension and makes great contributions to the comfort, stability and safety of the whole vehicle. However, the current trailing arm structure is severely affected in its structural durability when subjected to reciprocating tensile and compressive forces and large torsional angles, which will cause serious risks to the stability of the whole vehicle. Content of the Utility Model

[0003] The purpose of the utility model is to provide a trailing arm structure and a vehicle to solve the technical problem of how to improve the structural strength of the trailing arm.

[0004] The utility model is realized through the following technical solutions:

[0005] In the first aspect, the utility model provides a trailing arm structure, including a trailing arm body; the trailing arm body is in a cavity box structure;

[0006] One end of the trailing arm body is provided with a bushing and is connected to the vehicle body or the vehicle body bracket through the bushing;

[0007] The other end of the trailing arm body is provided with a steering knuckle connection part, and the steering knuckle is assembled and connected to the steering knuckle connection part;

[0008] The trailing arm body includes a first trailing arm plate body and a second trailing arm plate body arranged in parallel; the plate edges of the first trailing arm plate body and the second trailing arm plate body are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body and the second trailing arm plate body.

[0009] Preferably, an outer tube assembly groove is provided at the end of the trailing arm body where the bushing is arranged; the groove surface of the outer tube assembly groove is a U-shaped surface; a bushing outer tube is welded in the outer tube assembly groove; the bushing is press-fitted into the bushing outer tube.

[0010] Further, the bushing outer tube and the bushing are arranged on the same axis, and the bushing is provided with damping holes along the direction of the trailing arm body for attenuating the impact vibration in the horizontal direction of the whole vehicle.

[0011] Furthermore, the inner diameter of the bushing outer tube corresponds to the outer diameter of the bushing.

[0012] Preferably, an assembly hole for assembling a steering knuckle is provided on the steering knuckle connecting portion.

[0013] Preferably, reinforcing rib regions are respectively provided on the outer sides of the first trailing arm plate body and the second trailing arm plate body.

[0014] Preferably, mounting holes are provided in the reinforcing rib regions of the first trailing arm plate body and the second trailing arm plate body for assembling resonators.

[0015] Preferably, the resonator includes an inner tube, the outer side of the inner tube is wrapped with rubber, the rubber outside the inner tube is wrapped with a mass block, and a mounting end is provided on the mass block, and the mounting end is assembled in the mounting hole.

[0016] Preferably, a convex structure is provided around the main spring structure in the bushing for restricting the torsional direction angle.

[0017] In a second aspect, the present invention provides a vehicle, including a trailing arm structure as described above.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] The present invention provides a trailing arm structure. One end of the trailing arm body is provided with a bushing, and the body or the body bracket is connected through the bushing; the other end of the trailing arm body is provided with a steering knuckle connecting portion, and a steering knuckle is assembled and connected on the steering knuckle connecting portion, which can attenuate the vibration excitation from the ground and improve the NVH performance of the whole vehicle. The trailing arm body includes a first trailing arm plate body and a second trailing arm plate body arranged in parallel; the edges of the first trailing arm plate body and the second trailing arm plate body are buckled and welded, so that the structural strength and durability life of the rear trailing arm assembly are greatly improved.

[0020] Further, an outer tube assembly groove is provided at the end of the trailing arm body where the bushing is provided; the groove surface of the outer tube assembly groove is a U-shaped surface; the outer tube of the bushing is welded in the outer tube assembly groove; the bushing is press-fitted into the outer tube of the bushing, which can effectively filter the impact from the whole vehicle in the horizontal direction.

[0021] Further, reinforcing rib regions are respectively provided on the outer sides of the first trailing arm plate body and the second trailing arm plate body. The structure is strengthened at the stress concentration position, the overall structure of the trailing arm is lightened, the overall strength of the trailing arm is greatly improved, and the structural strength and durability of the product are effectively improved.

[0022] Furthermore, mounting holes are provided in the reinforcing rib areas of the first trailing arm plate body and the second trailing arm plate body for assembling resonators. The resonator includes an inner tube, with rubber wrapped around the outer side of the inner tube, and a mass block is provided inside the inner tube. An installation end is provided on the mass block and is assembled in the mounting hole. By changing the resonance frequency of the suspension system through the resonance block, the vibration peak value is reduced, effectively improving the NVH performance of the whole vehicle.

[0023] Furthermore, a convex structure is provided at the end of the bushing, which can effectively limit the stress in the torsional direction of the bushing and improve the durability of the bushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the trailing arm structure in the present invention;

[0025] Figure 2 Exploded view of the trailing arm in the present invention;

[0026] Figure 3 Side view of the trailing arm structure in the present invention;

[0027] Figure 4 Schematic diagram of the position of the trailing arm in the whole vehicle in the present invention;

[0028] Figure 5 is Figure 4 side view of.

[0029] In the figure: 1 - trailing arm body; 2 - bushing; 3 - resonator; 4 - outer tube of the bushing; 5 - outer tube assembly groove; 6 - knuckle connection part; 7 - assembly hole; 8 - reinforcing rib area; 9 - mounting hole; 10 - knuckle; 11 - first trailing arm plate body; 12 - second trailing arm plate body; 21 - convex structure; 31 - mass block; 32 - inner tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] The following further describes the present utility model in detail with reference to the drawings:

[0033] The purpose of the present utility model is to provide a trailing arm structure and a vehicle to solve the technical problem of how to improve the strength of the trailing arm structure.

[0034] Embodiment 1

[0035] See Figure 1 and Figure 2 In an embodiment of the present utility model, a trailing arm structure is provided, including a trailing arm body 1; the trailing arm body 1 has a cavity box structure; one end of the trailing arm body 1 is provided with a bushing 2 and is connected to the vehicle body or a vehicle body bracket through the bushing 2; the other end of the trailing arm body 1 is provided with a knuckle connecting portion 6, and a knuckle 10 is assembled and connected to the knuckle connecting portion 6; the trailing arm body 1 includes a first trailing arm plate body 11 and a second trailing arm plate body 12 arranged in parallel; the plate edges of the first trailing arm plate body 11 and the second trailing arm plate body 12 are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body 11 and the second trailing arm plate body 12, as Figure 3 shown.

[0036] Specifically, an outer tube assembly groove 5 is provided at the end of the trailing arm body 1 where the bushing 2 is provided; the groove surface of the outer tube assembly groove 5 is a U-shaped surface; a bushing outer tube 4 is welded in the outer tube assembly groove 5; the bushing 2 is press-fitted into the bushing outer tube 4.

[0037] In this embodiment, for the outer tube assembly groove 5 involved in the trailing arm body 1, its groove surface is a U-shaped surface, and the U-shaped surface has a 120° wrap angle design, which greatly improves the strength and design life between the bushing outer tube 4 and the trailing arm body 1.

[0038] Among them, the outer bushing tube 4 and the bushing 2 are arranged on the same axis, and the axes of the outer bushing tube 4 and the bushing 2 are perpendicular to the cavity axis of the trailing arm body 1; the inner diameter of the outer bushing tube 4 corresponds to the outer diameter of the bushing 2, and the steering knuckle connecting portion 6 is provided with an assembly hole 7 for assembling the steering knuckle 10.

[0039] The bushing 2 is provided with damping holes along the direction of the trailing arm body 1 for attenuating the impact vibration in the horizontal direction of the whole vehicle and improving the comfort of the whole vehicle. Setting damping holes in the direction parallel to the spatial axis of the trailing arm body 1 can effectively filter the impact in the horizontal direction of the whole vehicle; at the same time, a convex structure is added to the main spring structure of the bushing 2 in the horizontal direction, which can effectively limit the stress in the torsional direction of the bushing and improve the durability of the bushing.

[0040] Embodiment 2

[0041] See Figure 1 In an embodiment of the present utility model, a trailing arm structure is provided, including a trailing arm body 1; the trailing arm body 1 has a cavity box structure; one end of the trailing arm body 1 is provided with a bushing 2, and is connected to the vehicle body or the vehicle body bracket through the bushing 2; the other end of the trailing arm body 1 is provided with a steering knuckle connecting portion 6, and the steering knuckle 10 is assembled and connected on the steering knuckle connecting portion 6; the trailing arm body 1 includes a first trailing arm plate body 11 and a second trailing arm plate body 12 arranged in parallel; the plate edges of the first trailing arm plate body 11 and the second trailing arm plate body 12 are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body 11 and the second trailing arm plate body 12.

[0042] Specifically, the outer sides of the first trailing arm plate body 11 and the second trailing arm plate body 12 are respectively provided with reinforcing rib areas 8.

[0043] The strengthened structural features in this embodiment greatly improve the structural strength and durability life of the rear trailing arm assembly. At the same time, the rear trailing arm body considers weight reduction design during design, strengthens the structure at the stress concentration position, and conversely, makes a weight reduction design at the position with smaller stress.

[0044] Specifically, the reinforcing rib areas 8 of the first trailing arm plate body 11 and the second trailing arm plate body 12 are provided with mounting holes 9 for assembling the resonator 3.

[0045] Among them, the resonator 3 includes an inner tube 32, the outside of the inner tube 32 is wrapped with rubber, the rubber outside the inner tube 32 is wrapped with a mass block 31, and the mass block 31 is provided with a mounting end, and the mounting end is assembled in the mounting hole 9.

[0046] In this embodiment, the resonance frequency of the suspension system is changed by the resonance block, the vibration peak value is reduced, and the NVH performance of the whole vehicle is effectively improved. By changing the suspension frequency with the resonance block, the comfort of the whole vehicle is effectively improved.

[0047] Embodiment 3

[0048] According to Figure 4 and Figure 5 As shown, this embodiment provides a vehicle, including a trailing arm structure as described above, wherein the trailing arm structure includes a trailing arm body 1; the trailing arm body 1 has a cavity box structure; one end of the trailing arm body 1 is provided with a bushing 2 and is connected to the vehicle body or the vehicle body bracket through the bushing 2; the other end of the trailing arm body 1 is provided with a knuckle connecting portion 6, and a knuckle 10 is assembled and connected to the knuckle connecting portion 6; the trailing arm body 1 includes a first trailing arm plate body 11 and a second trailing arm plate body 12 arranged in parallel; the plate edges of the first trailing arm plate body 11 and the second trailing arm plate body 12 are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body 11 and the second trailing arm plate body 12.

[0049] In this embodiment, considering platformization and generalization, the left and right sides of the whole vehicle are shared. As Figure 4 shown, the number of developed parts is reduced, and the left and right sides can be made general by translation, reducing the product development cost and lowering the R & D cost of the whole vehicle.

[0050] For a trailing arm structure provided by the present utility model, the trailing arm body 1 includes a first trailing arm plate body 11 and a second trailing arm plate body 12 arranged in parallel; the plate edges of the first trailing arm plate body 11 and the second trailing arm plate body 12 are buckled and welded, and a cavity structure is formed between the inner sides of the first trailing arm plate body 11 and the second trailing arm plate body 12; wherein, the first trailing arm plate body 11 and the second trailing arm plate body 12 are made of high-strength steel plates, and are welded by upper and lower plate splicing, and the weld seams adopt a cross-welding design, effectively improving the structural strength and durability of the product.

[0051] Wherein, the first trailing arm plate body 11 and the second trailing arm plate body 12 adopt a non-uniform cross-section design, and a weight reduction design is carried out according to the CAE analysis results, effectively controlling the cost of the product.

[0052] In summary, the present utility model provides a trailing arm structure. One end of the trailing arm body is provided with a bushing and is connected to the vehicle body or the vehicle body bracket through the bushing; the other end of the trailing arm body is provided with a knuckle connecting portion, and a knuckle is assembled and connected to the knuckle connecting portion, which can attenuate the vibration excitation from the ground and improve the NVH performance of the whole vehicle. Through the trailing arm body including a first trailing arm plate body and a second trailing arm plate body arranged in parallel; the plate edges of the first trailing arm plate body and the second trailing arm plate body are buckled and welded, the structural strength and durability life of the rear trailing arm assembly are greatly improved.

[0053] The trailing arm structure designed by the utility model ensures that the product has high stiffness and strength and a long design life. At the same time, it takes into account the overall vehicle performance and is conducive to the improvement of the overall vehicle NVH performance. The rear trailing arm body is strengthened by a double-plate welding structure, and strengthened structural features are applied to the upper and lower plates, so that the structural strength and durability life of the rear trailing arm assembly are greatly improved. At the same time, the rear trailing arm body considers weight reduction design during design, strengthens the structure at the stress concentration position, and conversely, makes a weight reduction design at the position with relatively small stress. At the beginning of the design of the rear trailing arm, platformization and generalization are fully considered, and it is shared by the left and right of the whole vehicle, reducing the number of developed parts. In addition, by changing the suspension frequency through the resonance block, the comfort of the whole vehicle is effectively improved.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered by the protection scope of the claims of the present invention.

Claims

1. A trailing arm structure, characterized in that: It comprises a trailing arm body (1); the trailing arm body (1) is in a hollow box structure; A bushing (2) is provided at one end of the trailing arm body (1), and the body or body bracket is connected via the bushing (2); The other end of the trailing arm body (1) is provided with a steering knuckle connection portion (6), and a steering knuckle (10) is assembled and connected to the steering knuckle connection portion (6); The trailing arm body (1) comprises a first trailing arm plate body (11) and a second trailing arm plate body (12) which are arranged in parallel; the plate body edges of the first trailing arm plate body (11) and the second trailing arm plate body (12) are arranged by snap-fitting and welding, and a cavity structure is formed between the inner sides of the first trailing arm plate body (11) and the second trailing arm plate body (12).

2. A trailing arm structure according to claim 1, characterized in that: The end of the trailing arm body (1) where the bushing (2) is arranged is provided with an outer tube assembly groove (5); the groove surface of the outer tube assembly groove (5) is a U-shaped surface; the bushing outer tube (4) is welded inside the outer tube assembly groove (5); and the bushing (2) is press-fitted into the bushing outer tube (4).

3. A trailing arm structure according to claim 2, characterized in that: The bushing outer tube (4) and the bushing (2) are arranged on the same axis, and the bushing (2) is provided with a damping hole in the direction along the trailing arm body (1) for attenuating the impact vibration of the entire vehicle in the horizontal direction.

4. A trailing arm structure according to claim 3, characterized in that: The inner diameter of the bushing outer tube (4) is set corresponding to the outer diameter of the bushing (2).

5. The trailing arm structure according to claim 1, characterized in that: The steering knuckle connecting portion (6) is provided with an assembly hole (7) for assembling the steering knuckle (10).

6. The trailing arm structure according to claim 1, characterized in that: The outer side surfaces of the first trailing arm plate body (11) and the second trailing arm plate body (12) are respectively provided with reinforcing rib areas (8).

7. The trailing arm structure according to claim 1, characterized in that: The reinforcing rib areas (8) of the first trailing arm plate body (11) and the second trailing arm plate body (12) are provided with mounting holes (9) for assembling the resonator (3).

8. A trailing arm structure according to claim 7, characterized in that: The resonator (3) comprises an inner tube (32), the outer side of the inner tube (32) is wrapped with rubber, the rubber outside of the inner tube (32) wraps a mass block (31), and a mounting end is provided on the mass block (31), and the mounting end is assembled in the mounting hole (9).

9. The trailing arm structure according to claim 1, characterized in that: A protrusion structure (21) is provided around the main spring structure in the bushing (2) to limit the torsion direction angle.

10. A vehicle, characterized in that: It comprises a trailing arm structure as described in any one of claims 1-9.

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