Lower swing arm structure, suspension system and vehicle

Abstract

The utility model discloses a lower swing arm structure, a suspension system and a vehicle, the lower swing arm structure comprises a lower swing arm, one end of the lower swing arm along the Y direction is provided with a first installation part hinged with a vehicle frame, the lower swing arm is also provided with an installation boss hinged with a stabilizer bar pull rod and a second installation part hinged with a shock absorber, the second installation part is located on the side, away from the first installation part, of the installation boss. The installation boss and the second installation part are located on the two sides of the lower swing arm in the Z direction respectively. According to the lower swing arm structure, the mounting boss is located between the first mounting part and the second mounting part, the mounting boss and the second mounting part are located on the two sides of the lower swing arm in the Z direction respectively, the positions of connecting points of the lower swing arm are reasonably arranged, the weight and cost of the lower swing arm are reduced, the unsprung mass of a suspension system is reduced, and the service life of the suspension system is prolonged. And the impact load of the suspension system is reduced, and the comfort and the stability of the vehicle are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of suspensions, and particularly to a lower arm structure, a suspension system and a vehicle. Background Art

[0002] In the related art, the function of an automobile suspension is to transmit all forces and torques acting between the wheels and the vehicle body, and it is an assembly of all transmission connection devices between the vehicle body and the wheels. The suspension arm assembly of an automobile is mainly connected to the front subframe assembly through a front bushing and a rear bushing, and is connected to the steering knuckle and the steering guide mechanism through a ball pin assembly. Since the lower suspension arm is the main load-bearing component and needs to meet relatively high strength and stiffness requirements, the strength requirement for the lower suspension arm is high, resulting in high manufacturing costs. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, an object of the utility model is to provide a lower arm structure, which is beneficial to reducing the weight and cost of the lower arm, enabling the lower arm to have relatively high strength and stiffness, reducing the unsprung mass of the suspension system, and also reducing the impact load of the suspension system, thereby improving the comfort and stability of the vehicle.

[0004] The utility model also provides a suspension system having the above-mentioned lower arm structure.

[0005] The utility model also provides a vehicle having the above-mentioned suspension system.

[0006] According to the lower arm structure of the first aspect embodiment of the utility model, it includes: a lower arm, one end of the lower arm in the Y direction has a first mounting portion hinged to the vehicle frame, the lower arm also has a mounting boss hinged to the stabilizer bar tie rod and a second mounting portion hinged to the shock absorber, the second mounting portion is located on a side of the mounting boss away from the first mounting portion, and the mounting boss and the second mounting portion are respectively located on both sides of the lower arm in the Z direction.

[0007] According to the lower arm structure of the embodiment of the utility model, the lower arm includes a first mounting portion, a second mounting portion and a mounting boss. The first mounting portion is hinged to the vehicle frame, the second mounting portion is hinged to the shock absorber, the mounting boss is hinged to the stabilizer bar tie rod, the mounting boss is located between the first mounting portion and the second mounting portion, and the mounting boss and the second mounting portion are respectively located on both sides of the lower arm in the Z direction. Reasonably arranging the positions of the connection points of the lower arm is beneficial to reducing the weight and cost of the lower arm, reducing the unsprung mass of the suspension system, and also reducing the impact load of the suspension system, thereby improving the comfort and stability of the vehicle.

[0008] According to some embodiments of the present utility model, the other end of the lower control arm in the Y direction has a ball pin for cooperating with the steering knuckle, and the ball pin is disposed adjacent to the second mounting portion.

[0009] According to some embodiments of the present utility model, the lower control arm includes a connecting arm main body, a first connecting arm and a second connecting arm connected to the same end of the connecting arm main body. The ends of the first connecting arm and the second connecting arm facing away from the connecting arm main body extend in directions away from each other. The mounting boss and the second mounting portion are both located on the connecting arm main body. The first mounting portion includes a first mounting hole located on the first connecting arm and a first mounting rod located on the second connecting arm. A first mounting bushing for cooperating with the vehicle frame is installed in the first mounting hole, and a second mounting bushing for cooperating with the vehicle frame is sleeved outside the first mounting rod. The first mounting bushing and the second mounting bushing are coaxially arranged, and the axial direction is the X direction.

[0010] According to some embodiments of the present utility model, the second mounting portion includes a second mounting hole located below the lower control arm. A third mounting bushing for cooperating with the shock absorber is provided in the second mounting hole, and the axis of the third mounting bushing extends along the X direction.

[0011] According to some embodiments of the present utility model, there is a shock absorber mounting bracket. The mounting bracket includes a main body portion, a first leg portion and a second leg portion connected to the lower end of the main body portion. The first leg portion and the second leg portion are respectively connected to two sides of the third mounting bushing in the X direction and are fixedly connected to the third mounting bushing by a first bolt.

[0012] According to some embodiments of the present utility model, the mounting boss is located above the lower control arm, and a third mounting hole for hinged connection with the stabilizer bar tie rod is provided on the mounting boss.

[0013] According to some embodiments of the present utility model, the lower control arm has a groove with an opening facing one side in the Z direction.

[0014] According to some embodiments of the present utility model, the lower control arm further has a reinforcing rib surrounding the groove.

[0015] The suspension system according to the second aspect embodiment of the present utility model includes the lower control arm structure according to the first aspect embodiment of the present utility model as described above.

[0016] According to the suspension system of the embodiments of the present utility model, by providing the above-mentioned lower control arm structure, it is beneficial to reduce the weight and cost of the lower control arm structure, reduce the unsprung mass of the suspension system, and can also reduce the impact load of the suspension system, thereby improving the comfort and stability of the vehicle.

[0017] A vehicle according to a third aspect embodiment of the present utility model includes a suspension system according to the second aspect embodiment of the present utility model as described above.

[0018] For the vehicle according to the embodiment of the present utility model, by providing the above suspension system, the unsprung mass of the suspension system is reduced, and the impact load of the suspension system can also be reduced, improving the comfort and stability of the vehicle.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a mating diagram of a lower control arm structure with a suspension system and a vehicle frame according to some embodiments of the present utility model;

[0022] Figure 2 is a mating diagram of a lower control arm structure with a suspension system according to some embodiments of the present utility model;

[0023] Figure 3 is a schematic diagram of a lower control arm structure according to some embodiments of the present utility model;

[0024] Figure 4 is a schematic diagram of a lower control arm according to some embodiments of the present utility model.

[0025] REFERENCE SIGNS:

[0026] 100, lower control arm structure;

[0027] 10, lower control arm;

[0028] 11, connecting arm body; 12, first connecting arm; 13, second connecting arm; 14, first mounting portion; 141, first mounting hole; 142, first mounting bushing; 143, first mounting rod; 144, second mounting bushing; 145, fixing bracket; 15, second mounting portion; 151, second mounting hole; 152, third mounting bushing; 16, mounting boss; 161, third mounting hole; 17, ball pin; 171, fixing rod; 172, ball pin mounting seat; 18, groove; 19, reinforcing rib;

[0029] 21, vehicle frame; 22, stabilizer link; 23, steering knuckle; 24, mounting bracket; 241, main body portion; 242, first leg portion; 243, second leg portion; 244, mounting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] Next, refer to Figures 1-4 to describe a lower arm structure 100 according to an embodiment of the present utility model.

[0034] According to a lower arm structure 100 of an embodiment of the first aspect of the present utility model, the lower arm structure 100 includes a lower arm 10. The lower arm 10 has a first mounting portion 14, and the first mounting portion 14 is located at one end of the lower arm 10 along the Y direction (the Y direction is the left-right direction of the vehicle). The lower arm 10 further has a mounting boss 16 and a second mounting portion 15. The second mounting portion 15 is located on the side of the mounting boss 16 away from the first mounting portion 14. The mounting boss 16 and the second mounting portion 15 are respectively located on both sides of the lower arm 10 along the Z direction (the Z direction is the up-down direction of the vehicle).

[0035] The first mounting portion 14 is hingedly connected to the vehicle frame 21, that is, the lower control arm 10 is hingedly connected to the vehicle frame 21, which can reduce the acting force of the up-and-down movement of the wheel on one end of the vehicle frame 21 and reduce the transmission of external excitations such as road surfaces to the vehicle body; the mounting boss 16 is hingedly connected to the stabilizer bar link 22, that is, the lower control arm 10 is hingedly connected to the stabilizer bar link 22. A stabilizer bar is connected between the two stabilizer bar links 22. When the vehicle is running, the stabilizer bar and the stabilizer bar links 22 can keep the vehicle body balanced and prevent the vehicle from having excessive lateral roll during turning; the second mounting portion 15 is hingedly connected to the shock absorber, that is, the lower control arm 10 is hingedly connected to the shock absorber, improving the comfort and stability of the vehicle; the lower control arm 10 hingedly connects structural components such as the vehicle frame 21, the stabilizer bar link 22, and the shock absorber to improve the handling stability and shock absorption ability of the vehicle during operation.

[0036] The mounting boss 16 and the second mounting portion 15 are respectively located on both sides of the lower control arm 10 along the Z direction. The positions of the mounting boss 16 and the second mounting portion 15 are reasonably arranged, and then the connection positions of the lower control arm 10 with the stabilizer bar link 22 and the lower control arm 10 with the shock absorber are reasonably arranged, which is beneficial to reducing the weight and cost of the lower control arm 10, enabling the lower control arm 10 to have high strength and stiffness, reducing the unsprung mass of the suspension system, and also reducing the impact load of the suspension system, improving the comfort and stability of the vehicle.

[0037] According to the lower control arm structure 100 of the embodiment of the present invention, the lower control arm 10 includes a first mounting portion 14, a second mounting portion 15, and a mounting boss 16. The first mounting portion 14 is hingedly connected to the vehicle frame 21, the second mounting portion 15 is hingedly connected to the shock absorber, the mounting boss 16 is hingedly connected to the stabilizer bar link 22. The mounting boss 16 is located between the first mounting portion 14 and the second mounting portion 15, and the mounting boss 16 and the second mounting portion 15 are respectively located on both sides of the lower control arm 10 along the Z direction. Reasonably arranging the positions of the connection points of the lower control arm 10 is beneficial to reducing the weight and cost of the lower control arm 10, reducing the unsprung mass of the suspension system, and also reducing the impact load of the suspension system, improving the comfort and stability of the vehicle.

[0038] According to some embodiments of the present invention, referring to Figures 1-4 , at the other end of the lower control arm 10 along the Y direction, there is a ball joint 17 that cooperates with the steering knuckle 23. The ball joint 17 is arranged adjacent to the second mounting portion 15. The lower control arm 10 has a ball joint mounting seat 172 that cooperates with the ball joint 17. The ball joint 17 is located within the ball joint mounting seat 172 and can achieve rotational freedom relative to the ball joint mounting seat 172. The ball joint 17 has a fixing rod 171. One end of the fixing rod 171 is connected to the ball joint 17, and the other end is connected to the steering knuckle 23. The steering knuckle 23 is connected to the wheel. When the vehicle steers, the steering knuckle 23 acts on the vehicle, thereby steering the wheel.

[0039] According to some embodiments of the present invention, referring to Figures 1-4 The lower swing arm 10 includes a connecting arm body 11, a first connecting arm 12, and a second connecting arm 13. The first connecting arm 12 and the second connecting arm 13 are connected to the same end of the connecting arm body 11, and the first connecting arm 12 and the second connecting arm 13 extend in a direction away from each other from one end of the connecting arm body 11, that is, the first connecting arm 12 and the second connecting arm 13 are arranged at an angle. The mounting boss 16 and the second mounting portion 15 are both located on the connecting arm body 11. The first mounting portion 14 includes a first mounting hole 141 and a first mounting rod 143. The first mounting hole 141 is located on the first connecting arm 12, and the first mounting rod 143 is located on the second connecting arm 13. A first mounting bushing 142 matching with the vehicle frame 21 is installed in the first mounting hole 141. The outer side of the first mounting rod 143 is sleeved with a second mounting bushing 144 matching with the vehicle frame 21. The first mounting bushing 142 and the second mounting bushing 144 are coaxially arranged, and the axial direction is the X direction (the X direction is the front and rear direction of the vehicle).

[0040] The axes of the first mounting bushing 142 and the second mounting bushing 144 extend along the X direction, so that the lateral and vertical stiffness of the first mounting bushing 142 and the second mounting bushing 144 are large and the longitudinal rotational stiffness is low, thereby reducing the force exerted by the up and down bouncing of the wheel on one end of the frame 21 and reducing the transmission of external excitations such as the road surface to the vehicle body, effectively improving road noise and tire noise, and enhancing the NVH performance of the vehicle, while also increasing the service life of the first mounting bushing 142 and the second mounting bushing 144 and reducing maintenance costs.

[0041] A second bolt is passed through the center hole of the first mounting bushing 142 to connect with the frame 21. A fixing bracket 145 is provided on the second mounting bushing 144. The fixing bracket 145 and the frame 21 are fixedly connected by a third bolt, so that the assembly process of the lower swing arm 10 and the frame 21 is simple and convenient for maintenance and disassembly.

[0042] For example, the first mounting bushing 142 and the second mounting bushing 144 are both rubber bushings.

[0043] According to some embodiments of the present invention, referring to Figures 1-4 The second mounting portion 15 includes a second mounting hole 151, and the second mounting hole 151 is located below the lower arm 10. The second mounting hole 151 has a third mounting bushing 152 that cooperates with the shock absorber. The third mounting bushing 152 and the shock absorber together have a dual shock-absorbing effect, which reduces the impact of the external load on the suspension system and improves the comfort and stability of the vehicle.

[0044] The axis of the third mounting bushing 152 extends along the X direction, so that the third mounting bushing 152 has small longitudinal rotational stiffness and large lateral and vertical stiffness, which is beneficial to reducing the resistance of the suspension system to up and down bouncing and can also improve the lateral and vertical stiffness.

[0045] For example, the third mounting bushing 152 is a rubber bushing.

[0046] According to some embodiments of the present invention, referring to Figures 1-4 , the shock absorber includes a mounting bracket 24. The mounting bracket 24 includes a main body portion 241 and a first leg portion 242 and a second leg portion 243 connected to the lower end of the main body portion 241. The first leg portion 242 and the second leg portion 243 are respectively connected to both sides of the third mounting bushing 152 along the X direction, and the first leg portion 242 and the second leg portion 243 are fixedly connected to the third mounting bushing 152 by a first bolt, which facilitates the installation and maintenance of the shock absorber.

[0047] An air spring is installed above the mounting bracket 24. An installation groove 244 is formed above the mounting bracket 24. The air spring is located in the installation groove 244. The first leg portion 242 and the second leg portion 243 are connected to the lower side of the lower control arm 10, reducing the size and weight of the mounting bracket 24 at the lower end of the shock absorber, increasing the stroke of the air spring of the suspension system, correspondingly reducing the outer diameter of the air spring, reducing the vertical height of the suspension system, and narrowing the layout space of the suspension system, thereby reducing the cost of the entire suspension system.

[0048] According to some embodiments of the present invention, referring to Figures 1-4 , the mounting boss 16 is located above the lower control arm 10. A third mounting hole 161 is provided on the mounting boss 16. The third mounting hole 161 is hingedly connected to the stabilizer link 22, which facilitates the connection and fixation of the stabilizer link 22.

[0049] Both wheels at the front or rear of the vehicle each have a lower control arm 10. Each lower control arm 10 is correspondingly connected to a stabilizer link 22, that is, two stabilizer links 22 are provided. A stabilizer bar is connected between the two stabilizer links 22. When the vehicle is running, the stabilizer bar and the stabilizer links 22 can keep the vehicle body balanced and prevent the vehicle from experiencing excessive lateral roll during turning. The stabilizer link 22 is connected above the lower control arm 10, which is beneficial for reducing the lever arm length from the outer end of the stabilizer bar to the installation and fixation point, thereby being beneficial for reducing the wire diameter of the stabilizer bar and the force on the stabilizer bar fixation point.

[0050] According to some embodiments of the present invention, referring to Figures 1-4 , the lower control arm 10 has a groove 18 with an opening facing one side in the Z direction. The Z direction is the up and down direction of the vehicle. The opening of the groove 18 can face upward or downward. By providing the groove 18 on the lower control arm 10, the weight of the lower control arm 10 can be reduced, and further the weight of the suspension system can be reduced.

[0051] According to some embodiments of the present invention, referring to Figures 1-4, the lower control arm 10 further has a reinforcing rib 19 disposed around the groove 18. The reinforcing rib 19 can improve the overall stiffness and strength of the lower control arm 10, enabling the vehicle to obtain better stability and reliable performance.

[0052] The suspension system according to the second aspect embodiment of the present invention includes the lower control arm structure 100 according to the first aspect embodiment of the present invention described above.

[0053] The suspension system according to the embodiment of the present invention, by providing the above-mentioned lower control arm structure 100, is beneficial to reducing the weight and cost of the lower control arm structure 100, reducing the unsprung mass of the suspension system, and can also reduce the impact load of the suspension system, improving the comfort and stability of the vehicle.

[0054] The vehicle according to the third aspect embodiment of the present invention includes the suspension system according to the second aspect embodiment of the present invention described above.

[0055] The vehicle according to the embodiment of the present invention, by providing the above-mentioned suspension system, reduces the unsprung mass of the suspension system, and can also reduce the impact load of the suspension system, improving the comfort and stability of the vehicle.

[0056] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "optionally", "further", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lower swing arm structure, characterized in that: include: A lower swing arm, wherein one end of the lower swing arm along the Y direction has a first mounting portion hingedly connected to the vehicle frame, the lower swing arm also has a mounting boss hingedly connected to the stabilizer rod and a second mounting portion hingedly connected to the shock absorber, the second mounting portion is located on a side of the mounting boss away from the first mounting portion, and the mounting boss and the second mounting portion are respectively located on both sides of the lower swing arm along the Z direction.

2. The lower swing arm structure according to claim 1, characterized in that: The other end of the lower swing arm along the Y direction has a ball pin hinged with the steering knuckle, and the ball pin is arranged adjacent to the second mounting portion.

3. The lower swing arm structure according to claim 1, characterized in that: The lower swing arm includes a connecting arm body and a first connecting arm and a second connecting arm connected to the same end of the connecting arm body, the first connecting arm and the second connecting arm extend in directions away from each other at one end of the connecting arm body away from each other, the mounting boss and the second mounting portion are both located on the connecting arm body, the first mounting portion includes a first mounting hole located in the first connecting arm and a first mounting rod located in the second connecting arm, a first mounting bushing matching the frame is installed in the first mounting hole, a second mounting bushing matching the frame is sleeved on the outer side of the first mounting rod, the first mounting bushing and the second mounting bushing are coaxially arranged, and the axial direction is in the X direction.

4. The lower swing arm structure according to claim 1, characterized in that: The second mounting portion includes a second mounting hole, the second mounting hole is located below the lower swing arm, a third mounting bushing matched with the shock absorber is provided in the second mounting hole, and the axis of the third mounting bushing extends along the X direction.

5. The lower swing arm structure according to claim 4, characterized in that: The shock absorber includes a mounting bracket, which includes a main body and a first leg and a second leg connected to the lower end of the main body, the first leg and the second leg are respectively connected to both sides of the third mounting bushing along the X direction, and are fixedly connected to the third mounting bushing by a first bolt.

6. The lower swing arm structure according to claim 1, characterized in that: The mounting boss is located above the lower swing arm, and a third mounting hole hingedly connected to the stabilizer bar tie rod is provided on the mounting boss.

7. The lower swing arm structure according to claim 1, characterized in that: The lower swing arm is provided with a groove with an opening toward one side of the Z direction.

8. The lower swing arm structure according to claim 7, characterized in that: The lower swing arm also has a reinforcing rib arranged around the groove.

9. A suspension system, characterized in that: The invention comprises the lower swing arm structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the suspension system of claim 9.

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