Swing arm, swing arm assembly and automobile
By designing weight-reduction holes on the main body of the swing arm and adopting a support arm structure with an acute angle layout, the problem of low material utilization in the lightweight design of the swing arm is solved, achieving weight reduction and improved vehicle performance while ensuring strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-06-12
Smart Images
Figure CN224348702U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of automotive parts technology, such as a control arm, a control arm assembly, and an automobile. Background Technology
[0002] With the continuous development of the automotive industry, lightweight design has become one of the important means to improve the overall vehicle performance. In automotive structure, the suspension system is a key component affecting the dynamic performance of the entire vehicle, and the control arm, as one of the core components of the suspension system, typically connects the frame and wheels, undertaking the functions of transmitting torque, damping vibrations, and maintaining wheel contact with the ground. Studies have shown that every 1 kg reduction in unsprung mass is equivalent to a reduction of approximately 10 kg in sprung mass; therefore, lightweighting of the control arm is particularly crucial.
[0003] Related technologies can use high-strength, lightweight materials (such as aluminum alloys) to manufacture swing arms, effectively reducing the weight of the swing arms while ensuring structural strength. However, although swing arms manufactured using these technologies can achieve lightweight design to some extent, they still suffer from problems such as insufficient optimization of the weight-reduction structural design and low material utilization, which limit the weight reduction effect of the swing arms.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0006] This disclosure provides a swing arm, a swing arm assembly, and a vehicle. The swing arm can effectively reduce the overall weight of the swing arm while ensuring structural strength and optimizing material utilization.
[0007] According to a first aspect of this disclosure, a swing arm is provided, including a swing arm body, a first arm, and a second arm;
[0008] The swing arm body includes a first end and a second end. A connecting hole is provided in the area near the first end. Multiple weight-reducing holes are provided at intervals along the direction from the first end to the second end. The hollow area of each weight-reducing hole is positively correlated with the width of the area of the swing arm body in which it is located.
[0009] The first arm has one end connected to the second end of the swing arm body, and the other end of the first arm extends toward the first direction and is provided with a bushing.
[0010] The second arm has one end connected to the second end of the swing arm body, and the other end of the second arm extends toward the second direction and is provided with a mounting shaft. The angle between the first direction and the second direction is an acute angle.
[0011] In some embodiments, the swing arm body includes a first body and a second body disposed adjacent to each other, wherein the thickness of the first body is less than the thickness of the second body;
[0012] The end of the first body serves as the first end of the swing arm body, and the end of the second body serves as the second end of the swing arm body. The first body is provided with a connecting hole, and the second body is provided with a plurality of weight reduction holes at intervals along the direction from the first end to the second end.
[0013] In some embodiments, the perforated area of each weight-reducing hole distributed in the second body along the direction from the first end to the second end gradually increases.
[0014] In some embodiments, the width of the second body gradually increases along the direction from the first end to the second end.
[0015] In some embodiments, the thickness of the second body gradually increases along the direction from the first end to the second end.
[0016] In some embodiments, there are multiple connection holes, with some connection holes located in the region of the first body near the second body and other connection holes located in the region of the first body near the first end.
[0017] In some embodiments, the width of the first arm gradually decreases along the direction away from the second end of the swing arm body; and / or, the width of the second arm gradually decreases along the direction away from the second end of the swing arm body.
[0018] In some embodiments, the second arm is provided with a weight-reducing hole, and the shape of the weight-reducing hole matches the contour of the second arm.
[0019] According to a second aspect of this disclosure, a swing arm assembly is provided, including a pin, a hydraulic bushing, and the swing arm provided in the first aspect of this disclosure, wherein the pin is mounted on the bushing and the hydraulic bushing is mounted on the mounting shaft.
[0020] According to a third aspect of this disclosure, an automobile is provided, including the swing arm assembly provided in the second aspect of this disclosure.
[0021] The control arm, control arm assembly, and automobile provided in this disclosure can achieve the following technical effects:
[0022] The swing arm provided in this embodiment has multiple weight-reducing holes spaced apart along the direction from the first end to the second end of the swing arm body. The hollow area of each weight-reducing hole is positively correlated with the width of the area of the swing arm body where it is located. This design can effectively reduce the overall weight of the swing arm while ensuring structural strength and optimizing material utilization. At the same time, the first arm with the bushing and the first arm with the mounting shaft extend in two directions forming acute angles. This layout not only helps to make effective use of space but also reduces mutual interference and improves the stability of the overall structure.
[0023] The above-mentioned control arm adopts a reasonable weight reduction hole design, and adjusts the hollow area according to the width of different areas of the control arm body, thereby achieving lightweighting while ensuring structural strength. At the same time, the acute angle layout of the first and second arms improves the space utilization and mechanical balance of the structure, ultimately achieving the goal of reducing unsprung mass and improving vehicle handling and comfort.
[0024] The above general description and the description below are exemplary and illustrative only and are not intended to limit this disclosure. Attached Figure Description
[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:
[0026] Figure 1 This is an axonometric view of a swing arm provided in an embodiment of this disclosure;
[0027] Figure 2 This is a top view of a swing arm provided in an embodiment of this disclosure;
[0028] Figure 3 This is a right view of a swing arm provided in an embodiment of this disclosure;
[0029] Figure 4 This is a left view of a swing arm provided in an embodiment of this disclosure;
[0030] Figure 5 This is a schematic diagram of a swing arm assembly provided in an embodiment of the present disclosure.
[0031] The explanations of the symbols in the attached figures are as follows:
[0032] 100° swing arm;
[0033] 1. Main body of the swing arm; 101. First main body; 102. Second main body;
[0034] 11 First end, 12 Second end, 13 Connecting hole, 14 Weight reduction hole;
[0035] 2 First arm, 3 Second arm, 4 Bushing, 5 Mounting shaft;
[0036] 200 pin, 300 hydraulic bushing. Detailed Implementation
[0037] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0038] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0039] Unless otherwise stated, the term "multiple" means two or more.
[0040] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.
[0041] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0042] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.
[0043] Combination Figures 1 to 4 As shown, this embodiment of the disclosure provides a swing arm 100, which includes a swing arm body 1, a first support arm 2, and a second support arm 3. Figure 1 and Figure 2 In the diagram, the dashed line A represents the boundary between the main body 1 of the swing arm and the first support arm 2 and the second support arm 3. One side of the dashed line A is the main body 1 of the swing arm, and the other side is the first support arm 2 and the second support arm 3.
[0044] The material of the swing arm 100 can be determined according to actual design requirements. For example, the material of the swing arm 100 can be steel, aluminum alloy, magnesium alloy, and composite materials (such as carbon fiber reinforced plastic). The main body 1, the first arm 2, and the second arm 3 can be manufactured as a single piece, for example, by casting.
[0045] The swing arm body 1 includes a first end 11 and a second end 12. A connecting hole 13 is provided in the area near the first end 11, and a plurality of weight-reducing holes 14 are provided at intervals along the direction from the first end 11 to the second end 12. The swing arm body 1 can be connected to the ball joint seat of the automobile based on the connecting hole 13 and bolts. The hollow area of each weight-reducing hole 14 is positively correlated with the width of the area of the swing arm body 1 in which it is located. That is, the wider the area of the swing arm body 1 in which the weight-reducing hole 14 is located, the larger the hollow area of the weight-reducing hole 14.
[0046] One end of the first support arm 2 is connected to the second end 12 of the swing arm body 1, and the other end of the first support arm 2 extends in a first direction and is provided with a bushing 4, which is used to install the pin 200. One end of the second support arm 3 is connected to the second end 12 of the swing arm body 1, and the other end of the second support arm 3 extends in a second direction and is provided with a mounting shaft 5, which is used to install the hydraulic bushing 300. Figure 2 As shown, the first direction and the second direction are represented by arrows L and N, respectively, and the angle between the first direction and the second direction is an acute angle.
[0047] In this embodiment, the layout of the weight-reducing holes 14 is designed using topology optimization technology based on mathematical algorithm optimization methods. During the structural design process, the stress distribution of the swing arm 100 under various strength conditions is comprehensively considered. High-stress areas and main force transmission paths are identified through simulation calculations. Material is retained in these key areas to ensure structural strength; at the same time, material in low-stress areas is removed to form the weight-reducing holes 14, thereby achieving the optimal distribution of materials.
[0048] The swing arm 100 provided in this embodiment has a plurality of weight-reducing holes 14 spaced apart along the direction from the first end 11 to the second end 12 on the main body 1 of the swing arm. The hollow area of each weight-reducing hole 14 is positively correlated with the width of the area of the swing arm main body 1 in which it is located. This design can effectively reduce the overall weight of the swing arm 100 while ensuring structural strength and optimizing material utilization. At the same time, the first arm 2, which is provided with a bushing 4, and the second arm 3, which is provided with a mounting shaft 5, extend in two directions forming acute angles. This layout helps to make effective use of space and improve the stability of the overall structure while ensuring that the first arm 2 and the second arm 3 do not interfere with each other.
[0049] The above-mentioned swing arm 100 adopts a reasonable weight reduction hole 14 design, and adjusts the hollow area according to the width of different areas of the swing arm body 1, thereby achieving lightweighting while ensuring structural strength; at the same time, the acute angle layout of the first arm 2 and the second arm 3 improves the space utilization and mechanical balance of the structure, ultimately achieving the purpose of reducing unsprung mass and improving vehicle handling and comfort.
[0050] In some embodiments, the swing arm body 1 includes a first body 101 and a second body 102 disposed adjacent to each other, wherein the thickness of the first body 101 is less than the thickness of the second body 102. The end of the first body 101 serves as the first end 11 of the swing arm body 1, and the end of the second body 102 serves as the second end 12 of the swing arm body 1. Figure 1 and Figure 2 In the diagram, dashed line B represents the boundary between the first body 101 and the second body 102, with the first body 101 on one side and the second body 102 on the other. The first body 101 is provided with a connecting hole 13, and the second body 102 is provided with a plurality of weight-reducing holes 14 at intervals along the direction from the first end 11 to the second end 12.
[0051] The first main body 101 is thinner and mainly serves a connecting function (through the connection holes 13). Its stress is relatively small, so it can be appropriately thinned to reduce weight. The second main body 102 is thicker and, as the part bearing the main load, ensures the strength and stiffness of the overall structure. This thickness difference design achieves the goal of retaining sufficient material in critical stress areas and reasonably reducing weight in non-critical areas, thus achieving lightweighting without sacrificing strength.
[0052] In some embodiments, the hollow areas of the weight-reducing holes 14 distributed along the direction from the first end 11 to the second end 12 in the second body 102 gradually increase. During the operation of the swing arm 100, the force usually gradually increases from the connecting end (first end 11) to the arm connecting end (second end 12), so the stress distribution along the length also shows a trend of increasing from small to large. By gradually increasing the hollow area of the weight-reducing holes 14 along the direction from the first end 11 to the second end 12, more material can be retained in high-stress areas to ensure strength, while more material can be removed in low-stress areas to achieve weight reduction, thereby achieving optimal material utilization. The design of gradually changing area of the weight-reducing holes 14 allows the material on the critical force transmission path to be retained when the swing arm 100 is under load, while non-critical areas are reasonably reduced in material, which avoids local strength deficiency and effectively reduces the overall weight.
[0053] In some embodiments, the width and thickness of the second body 102 gradually increase along the direction from the first end 11 to the second end 12. During operation, the force on the swing arm 100 typically increases gradually from the connecting end (first end 11) to the arm connecting end (second end 12). Therefore, as the main load-bearing area, the gradual increase in width and thickness of the second body 102 along the direction from the first end 11 to the second end 12 better adapts to the increasing load trend, thereby providing stronger structural support in areas with higher stress and improving overall strength. The gradually changing width design helps guide stress to be evenly distributed in the structure, avoiding stress concentration caused by abrupt changes in cross-section.
[0054] In some embodiments, there are multiple connecting holes 13. Some connecting holes 13 are located in the region of the first body 101 near the second body 102, and other connecting holes 13 are located in the region of the first body 101 near the first end 11. For example, there are three connecting holes 13. One connecting hole 13 is located in the region of the first body 101 near the second body 102, and the other two are located in the region of the first body 101 near the first end 11. The connecting holes 13 are distributed in different regions of the first body 101 (the side near the second body 102 and the side near the first end 11), which helps to distribute the force to the entire swing arm body 1 and avoid local stress concentration caused by a single concentrated force.
[0055] In some embodiments, the width of the first arm 2 gradually decreases along the direction away from the second end 12 of the swing arm body 1, and the width of the second arm 3 also gradually decreases along the direction away from the second end 12 of the swing arm body 1. By adopting a tapered width design, the first arm 2 and the second arm reduce material usage while meeting structural strength requirements, thus helping to further reduce their weight. Compared to a constant-width structure, the tapered structure is more conducive to guiding a smooth stress transition and reducing stress concentration caused by abrupt changes in cross-section.
[0056] In some embodiments, the second arm 3 is provided with weight-reducing holes 14, and the shape of the weight-reducing holes 14 matches the contour of the second arm 3. Providing weight-reducing holes 14 on the second arm 3 directly reduces the amount of material used in that area, thereby effectively reducing the overall weight of the swing arm 100. The fact that the shape of the weight-reducing holes 14 matches the contour of the second arm 3 means that the weight-reducing holes 14 are rationally laid out based on the arm's shape and force transmission path. This design can remove redundant material while avoiding disruption of critical force transmission paths.
[0057] Combination Figure 5 As shown, this embodiment of the present disclosure provides a swing arm assembly, which includes a swing arm 100, a pin 200 and a hydraulic bushing 300. The pin 200 is mounted on a bushing 4 and the hydraulic bushing 300 is mounted on a mounting shaft 5.
[0058] This disclosure provides an automobile, which includes a control arm assembly. The control arm body 1 can be connected to the ball joint seat of the automobile via a connection hole 13 and bolts. The pin shaft 200 is connected to the subframe of the automobile, and the hydraulic bushing 300 is connected to the subframe of the automobile via bolts.
[0059] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A swing arm, characterized in that, Includes the main body of the swing arm, the first arm, and the second arm; The swing arm body includes a first end and a second end. A connecting hole is provided in the area near the first end. Multiple weight-reducing holes are provided at intervals along the direction from the first end to the second end. The hollow area of each weight-reducing hole is positively correlated with the width of the area of the swing arm body in which it is located. The first arm has one end connected to the second end of the swing arm body, and the other end of the first arm extends toward the first direction and is provided with a bushing. The second arm has one end connected to the second end of the swing arm body, and the other end of the second arm extends toward the second direction and is provided with a mounting shaft. The angle between the first direction and the second direction is an acute angle.
2. The swing arm according to claim 1, characterized in that, The swing arm body includes a first body and a second body arranged adjacent to each other, and the thickness of the first body is less than the thickness of the second body; The end of the first body serves as the first end of the swing arm body, and the end of the second body serves as the second end of the swing arm body. The first body is provided with a connecting hole, and the second body is provided with a plurality of weight reduction holes at intervals along the direction from the first end to the second end.
3. The swing arm according to claim 2, characterized in that, The perforated area of each weight-reducing hole distributed along the direction from the first end to the second end in the second main body gradually increases.
4. The swing arm according to claim 3, characterized in that, The width of the second body gradually increases from the first end to the second end.
5. The swing arm according to claim 3, characterized in that, The thickness of the second body gradually increases from the first end to the second end.
6. The swing arm according to claim 2, characterized in that, There are multiple connection holes. Some connection holes are located in the area of the first body near the second body, and other connection holes are located in the area of the first body near the first end.
7. The swing arm according to claim 1, characterized in that, The width of the first arm gradually decreases along the direction away from the second end of the swing arm body; And / or, the width of the second arm gradually decreases along the direction away from the second end of the swing arm body.
8. The swing arm according to claim 1, characterized in that, The second arm is provided with a weight-reducing hole, and the shape of the weight-reducing hole matches the outline of the second arm.
9. A swing arm assembly, characterized in that, It includes a pin, a hydraulic bushing, and a swing arm as described in any one of claims 1 to 8, wherein the pin is mounted on the bushing and the hydraulic bushing is mounted on the mounting shaft.
10. A car, characterized in that, Includes the swing arm assembly as described in claim 9.