Suspension structure and automobile

Abstract

The utility model relates to the technical field of automobile suspensions, in particular to a suspension structure and an automobile. The suspension structure comprises an auxiliary frame, a connecting rod assembly and a plate spring, and an avoiding hole is formed in the auxiliary frame. The number of the connecting rod assemblies is two, the two connecting rod assemblies are arranged on the two opposite sides of the auxiliary frame respectively, each connecting rod assembly comprises a steering knuckle and a rear lower swing arm, one end of each rear lower swing arm is connected with the corresponding steering knuckle, and the other end of each rear lower swing arm is connected with the auxiliary frame. The plate spring extends in the length direction of the auxiliary frame, the two ends of the plate spring are connected with the two rear lower swing arms respectively, the plate spring penetrates through the receding hole, and the outer wall of the plate spring and the inner wall of the receding hole are arranged in a spaced mode. According to the suspension structure and the automobile, the problems that an existing suspension structure is high in cost and large in occupied space are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile suspension, in particular to a suspension structure and an automobile. BACKGROUND

[0002] Suspension is an important part of a vehicle, which can transmit the force received by the wheel to the vehicle body, and can also absorb impact and attenuate vibration, thereby improving the safety and comfort of the vehicle.

[0003] In the related art, the automobile suspension often uses a subframe and an air spring to bear the load, and uses a stabilizer bar to improve lateral support and prevent tilting. However, the manufacturing process of the air spring is complex, the cost is high, and it is not easy to maintain. The setting of the stabilizer bar occupies a large longitudinal space, which is not conducive to the arrangement of other parts. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a suspension structure and an automobile to solve the problems of high cost and large space occupation of the existing suspension structure.

[0005] The present application provides a suspension structure, which comprises a subframe, a connecting rod assembly and a leaf spring, the subframe is provided with a clearance hole; the number of the connecting rod assembly is two, and the two connecting rod assemblies are respectively arranged on opposite sides of the subframe, the connecting rod assembly comprises a steering knuckle and a rear lower swing arm, one end of the rear lower swing arm is connected to the steering knuckle, and the other end is connected to the subframe; the leaf spring extends along the length direction of the subframe, and the two ends of the leaf spring are respectively connected to the two rear lower swing arms, wherein the leaf spring is arranged in the clearance hole, and the outer wall of the leaf spring and the inner wall of the clearance hole are arranged in a spaced manner.

[0006] In one embodiment, the gap between the outer wall of the leaf spring and the inner wall of the clearance hole is L, and L is greater than or equal to 10mm.

[0007] In one embodiment, the leaf spring is provided in a glass fiber structure or a carbon fiber composite structure.

[0008] In one embodiment, the leaf spring is a single-piece structure.

[0009] In one embodiment, the leaf spring is arranged in an arc shape.

[0010] In one of the embodiments, the suspension structure further comprises a shock absorber, the shock absorber extends along the height direction of the sub-frame, and one end of the shock absorber is connected to the rear lower swing arm, and the other end is used for connecting the vehicle body; the connecting point of the shock absorber on the rear lower swing arm is defined as a first connecting point, and the connecting point of the leaf spring on the rear lower swing arm is defined as a second connecting point, wherein the first connecting point is arranged close to the second connecting point, and the first connecting point is arranged spaced apart from the second connecting point.

[0011] In one of the embodiments, the rear lower swing arm comprises an arm body and a connecting part, one end of the arm body is provided with a first U-shaped groove, the steering knuckle and the shock absorber are connected with the arm body through the first U-shaped groove, and the other end of the arm body is connected with the sub-frame; the connecting part extends along the height direction of the sub-frame and is connected with the arm body, wherein the connecting part is provided with a second U-shaped groove, and the end part of the leaf spring is inserted into the second U-shaped groove and connected with the connecting part.

[0012] In one of the embodiments, the steering knuckle, the shock absorber and the sub-frame are flexibly connected with the rear lower swing arm through a bushing.

[0013] In one of the embodiments, the linkage assembly further comprises a rear upper swing arm, a front lower swing arm, a front upper swing arm and a toe control rod, the rear upper swing arm is arranged above the rear lower swing arm, one end of the rear upper swing arm is connected with the steering knuckle, and the other end is connected with the sub-frame; the front lower swing arm is arranged in front of the rear lower swing arm, one end of the front lower swing arm is connected with the steering knuckle, and the other end is connected with the sub-frame; the front upper swing arm is arranged above the front lower swing arm, one end of the front upper swing arm is connected with the steering knuckle, and the other end is connected with the sub-frame; the toe control rod is arranged between the front upper swing arm and the front lower swing arm, one end of the toe control rod is connected with the steering knuckle, and the other end is connected with the sub-frame.

[0014] The application further provides an automobile comprising the suspension structure according to any one of the embodiments.

[0015] Compared with the prior art, the suspension structure and the automobile provided by the application can effectively reduce the number and weight of parts, realize lightweight of the suspension, and optimize the arrangement space, facilitating installation of other parts (such as a battery pack) in the vehicle body. Moreover, the two ends of the leaf spring are connected to the rear lower swing arms on the left and right sides of the subframe, which can more effectively take into account the functions of air spring damping and support and the function of stabilizer bar anti-rolling, and is convenient to disassemble, replace and maintain. Meanwhile, the subframe avoids the leaf spring through the avoiding hole, so that the middle part of the leaf spring is not connected to any other parts, reducing the stress abrasion of the leaf spring, increasing the service life of the leaf spring, and ensuring the use performance of the leaf spring. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A top view of the suspension structure of an embodiment provided by the present application;

[0018] Figure 2 A front view of the suspension structure of an embodiment provided by the present application;

[0019] Figure 3 A structural schematic view of the suspension structure of an embodiment provided by the present application;

[0020] Figure 4 An enlarged view of A in FIG. Figure 3

[0021] Figure 5 A schematic view of the cooperation of the leaf spring and the avoiding hole of an embodiment provided by the present application.

[0022] The meanings of the symbols in the drawings are as follows:

[0023] 100, suspension structure; 10, subframe; 101, avoiding hole; 20, connecting rod assembly; 21, steering knuckle; 22, rear lower swing arm; 2201, first U-shaped groove; 2202, second U-shaped groove; 221, arm body; 222, connecting part; 23, rear upper swing arm; 24, front lower swing arm; 25, front upper swing arm; 26, toe control rod; 30, leaf spring; 40, shock absorber. DETAILED DESCRIPTION

[0024] ​In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the detailed description of the specific embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners according to the teachings of the present application, and so the present application is not limited to the specific embodiments described below. Instead, any improvement similar to the technical solutions disclosed herein falls within the scope of the present application.

[0025] It should be noted that when a component is referred to as being "on" or "set on" another component, it can be directly on the other component or there can be an intermediate component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intermediate component. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for the purpose of illustration only and do not indicate the only implementation.

[0026] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0029] Suspension is an important part of a vehicle, which can transmit the force received by the wheels to the body and cushion the impact, attenuate the vibration, thereby improving the safety and comfort of the vehicle driving.

[0030] In the related art, the automobile suspension often uses a subframe and an air spring to bear the load, and uses a stabilizer bar to improve lateral support and prevent tilting. However, the manufacturing process of the air spring is complex, the cost is high, and the air spring is not easy to maintain. The setting of the stabilizer bar occupies a large longitudinal space, which is not conducive to the arrangement of other parts.

[0031] Please refer to Figures 1-5 To solve the problems of high cost and large space occupation of the existing suspension structure, the present application provides a suspension structure 100 applied to an automobile.

[0032] Specifically, the suspension structure 100 includes a subframe 10, a connecting rod assembly 20, and a leaf spring 30. The subframe 10 is provided with a clearance hole 101. The number of connecting rod assemblies 20 is two, and the two connecting rod assemblies 20 are respectively arranged on opposite sides of the subframe 10. The connecting rod assembly 20 includes a steering knuckle 21 and a rear lower swing arm 22. One end of the rear lower swing arm 22 is connected to the steering knuckle 21, and the other end is connected to the subframe 10. The leaf spring 30 extends along the length direction of the subframe 10, and the two ends of the leaf spring 30 are respectively connected to the two rear lower swing arms 22. The leaf spring 30 is arranged in the clearance hole 101, and the outer wall of the leaf spring 30 and the inner wall of the clearance hole 101 are arranged in a spaced manner.

[0033] It can be understood that, by arranging the leaf spring 30 to replace the air spring and the stabilizer bar structure in the prior art, the number and weight of parts can be effectively reduced, the suspension can be lightened, the arrangement space can be optimized, and the installation of other parts (such as a battery pack) in the vehicle body is facilitated. Moreover, the two ends of the leaf spring 30 are connected to the rear lower swing arms 22 on the left and right sides of the subframe 10, which can more effectively take into account the functions of the air spring for damping and supporting and the function of the stabilizer bar for preventing tilting, and the leaf spring 30 is easy to disassemble, replace and maintain. At the same time, the subframe 10 avoids the leaf spring 30 by means of the clearance hole 101, so that the middle part of the leaf spring 30 is not connected to any other part, reducing the stress and wear of the leaf spring 30, increasing the service life of the leaf spring 30, and ensuring the use performance of the leaf spring 30.

[0034] Specifically, as Figure 5 shown, the gap between the outer wall of the leaf spring 30 and the inner wall of the clearance hole 101 is L, and L≥10mm. In this way, it is further ensured that the subframe 10 will not interfere with the leaf spring 30, and the leaf spring 30 can be normally used. For example, the value of L can be 10mm, 11mm or 12mm, etc.

[0035] In an embodiment, the leaf spring 30 is a single-piece structure. Here, the thickness of the single-piece leaf spring 30 can be increased to ensure the same or stronger performance as the leaf spring 30 structure in the form of multiple layers stacked together. Moreover, the single-piece leaf spring 30 structure is simple, further reducing the disassembly difficulty.

[0036] The leaf spring 30 can be configured as a glass fiber structure or a carbon fiber composite structure. Glass fiber and carbon fiber composite materials have high strength and are lighter than traditional steel materials. After being processed into the leaf spring 30, the suspension can be lightweight while maintaining the strength of the leaf spring 30. Furthermore, the leaf spring 30 made of glass fiber and carbon fiber composite materials also has high corrosion resistance and can withstand greater stress and more complex stress states, effectively extending the service life of the leaf spring 30 and improving the reliability and durability of the suspension structure 100.

[0037] Furthermore, the leaf spring 30 is arranged in a downward arc shape. The arc-shaped leaf spring 30 has a stronger load-bearing and anti-roll effect, which is conducive to improving the overall performance of the suspension structure 100.

[0038] For ease of explanation, this application defines as follows: Figure 1 The front and rear directions shown, parallel to the width direction of the subframe 10, define the following: Figure 2 The upper and lower sections shown are parallel to the height direction of the subframe 10.

[0039] In one embodiment, such as Figure 2 As shown, the suspension structure 100 also includes a shock absorber 40, which extends along the height of the subframe 10. One end of the shock absorber 40 is connected to the rear lower control arm 22, and the other end is connected to the vehicle body. The shock absorber 40 can dampen excitation from the road surface, thereby improving the ride comfort of the vehicle.

[0040] Furthermore, such as Figure 3 and Figure 4 As shown, the connection point of the shock absorber 40 on the rear lower control arm 22 is defined as the first connection point, and the connection point of the leaf spring 30 on the rear lower control arm 22 is defined as the second connection point. The first connection point is positioned close to the second connection point, and the first connection point and the second connection point are spaced apart. By positioning the end of the leaf spring 30 close to the shock absorber 40 and controlling the distance between the leaf spring 30 and the shock absorber 40, the leaf spring 30 can cooperate with the shock absorber 40, further improving the wheel's motion response and enhancing the vehicle's handling stability.

[0041] Specifically, the rear lower swing arm 22 comprises an arm body 221 and a connecting portion 222, the arm body 221 is provided with a first U-shaped groove 2201 at one end, the steering knuckle 21 and the shock absorber 40 are connected with the arm body 221 through the first U-shaped groove 2201, the other end of the arm body 221 is connected with the auxiliary frame 10, that is, the first U-shaped groove 2201 forms a first connecting point of the shock absorber 40 connected on the rear lower swing arm 22. At the same time, the connecting portion 222 extends along the height direction of the auxiliary frame 10 and is connected with the arm body 221, wherein the connecting portion 222 is provided with a second U-shaped groove 2202, the end of the leaf spring 30 is inserted into the second U-shaped groove 2202 and connected with the connecting portion 222, that is, the second U-shaped groove 2202 forms a second connecting point of the leaf spring 30 connected on the rear lower swing arm 22. In this way, through the arrangement of the first U-shaped groove 2201 and the second U-shaped groove 2202, the connection efficiency of the steering knuckle 21, the shock absorber 40 and the leaf spring 30 with the rear lower swing arm 22 is improved, and the connection difficulty is reduced.

[0042] Wherein, the steering knuckle 21, the shock absorber 40 and the auxiliary frame 10 are all flexibly connected with the rear lower swing arm 22 through the bushings. Since the bushing is usually of soft structure such as rubber, when the bushing is used for connection, the impact and vibration transmitted to the vehicle body can be effectively reduced, and the safety and comfort of the vehicle driving are improved.

[0043] But not limited to this, in other embodiments, ball hinge or the like can also be used for connection.

[0044] In an embodiment, as shown in Figure 1 and Figure 2 The connecting rod assembly 20 further comprises a rear upper swing arm 23, a front lower swing arm 24, a front upper swing arm 25 and a toe control rod 26, that is, in this embodiment, the suspension structure 100 adopts a five-link independent suspension structure 100, which has strong control stability, high comfort and is easy to control.

[0045] Specifically, the rear upper swing arm 23 is arranged above the rear lower swing arm 22, one end of the rear upper swing arm 23 is connected with the steering knuckle 21, and the other end is connected with the auxiliary frame 10. The front lower swing arm 24 is arranged in front of the rear lower swing arm 22, one end of the front lower swing arm 24 is connected with the steering knuckle 21, and the other end is connected with the auxiliary frame 10, which mainly plays a role in supporting the lateral force from the wheel hub. The front upper swing arm 25 is arranged above the front lower swing arm 24, one end of the front upper swing arm 25 is connected with the steering knuckle 21, and the other end is connected with the auxiliary frame 10, which mainly plays a role in adjusting the camber angle. The toe control rod 26 is arranged between the front upper swing arm 25 and the front lower swing arm 24, one end of the toe control rod 26 is connected with the steering knuckle 21, and the other end is connected with the auxiliary frame 10, which mainly plays a role in adjusting the toe angle. Here, the rear upper swing arm 23, the front lower swing arm 24, the front upper swing arm 25 and the toe control rod 26 can also be flexibly connected with the steering knuckle 21 and the auxiliary frame 10 by using bushings or ball hinges and the like.

[0046] In other embodiments, the linkage assembly 20 can also employ a conventional three-link or four-link linkage structure.

[0047] The application also provides an automobile comprising the suspension structure 100 of any one of the above embodiments.

[0048] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0049] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A suspension structure, characterized by, The suspension structure comprises: a subframe (10) provided with a clearance hole (101); two connecting rod assemblies (20) arranged on opposite sides of the subframe (10), each of the connecting rod assemblies (20) comprising a knuckle (21) and a rear lower swing arm (22), one end of the rear lower swing arm (22) being connected to the knuckle (21) and the other end being connected to the subframe (10); a leaf spring (30) extending along the length direction of the subframe (10), both ends of the leaf spring (30) being connected to the two rear lower swing arms (22), wherein the leaf spring (30) is arranged in the clearance hole (101), and the outer wall of the leaf spring (30) is spaced apart from the inner wall of the clearance hole (101).

2. The suspension structure according to claim 1, characterized by The gap between the outer wall of the leaf spring (30) and the inner wall of the clearance hole (101) is L, and L is greater than or equal to 10 mm.

3. The suspension structure according to claim 1, characterized by The leaf spring (30) is made of glass fiber structure or carbon fiber composite structure.

4. The suspension structure according to claim 1, characterized by The leaf spring (30) is a single-piece structure.

5. The suspension structure according to claim 1, characterized by The leaf spring (30) is arranged in an arc shape.

6. The suspension structure according to claim 1, characterized by The suspension structure further comprises a shock absorber (40) extending along the height direction of the subframe (10), one end of the shock absorber (40) being connected to the rear lower swing arm (22) and the other end being used for connecting a vehicle body; the connection point of the shock absorber (40) on the rear lower swing arm (22) is defined as a first connection point, and the connection point of the leaf spring (30) on the rear lower swing arm (22) is defined as a second connection point, wherein the first connection point is arranged close to the second connection point, and the first connection point is spaced apart from the second connection point.

7. The suspension structure according to claim 6, characterized in that The rear lower swing arm (22) comprises: an arm body (221) provided with a first U-shaped groove (2201) at one end, the knuckle (21) and the shock absorber (40) being connected to the arm body (221) through the first U-shaped groove (2201), the other end of the arm body (221) being connected to the subframe (10); a connecting portion (222) extending along the height direction of the subframe (10) and connected to the arm body (221), wherein the connecting portion (222) is provided with a second U-shaped groove (2202), and the end of the leaf spring (30) is inserted into the second U-shaped groove (2202) and connected to the connecting portion (222).

8. The suspension structure according to claim 7, characterized by The knuckle (21), the shock absorber (40) and the subframe (10) are flexibly connected to the rear lower swing arm (22) through bushings.

9. The suspension structure according to claim 1, characterized by The connecting rod assembly (20) further comprises: a rear upper swing arm (23) arranged above the rear lower swing arm (22), one end of the rear upper swing arm (23) being connected to the knuckle (21) and the other end being connected to the subframe (10). A front lower swing arm (24) is arranged in front of the rear lower swing arm (22), and one end of the front lower swing arm (24) is connected to the knuckle (21) and the other end is connected to the subframe (10); A front upper swing arm (25) is arranged above the front lower swing arm (24), and one end of the front upper swing arm (25) is connected to the knuckle (21) and the other end is connected to the subframe (10); A front toe control rod (26) is arranged between the front upper swing arm (25) and the front lower swing arm (24), and one end of the front toe control rod (26) is connected to the knuckle (21) and the other end is connected to the subframe (10).

10. An automobile characterized by comprising: The suspension structure as claimed in any one of claims 1 to 9. The suspension structure as claimed in any one of claims 1 to 9.

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