Plate spring, suspension assembly with plate spring and vehicle

Abstract

The utility model discloses a leaf spring and a suspension assembly and a vehicle with the leaf spring, the leaf spring comprises a leaf spring main body, the leaf spring main body extends along the width direction of the vehicle, the two ends of the leaf spring main body are provided with first connecting parts, the first connecting parts are used for connecting a lower swing arm of the vehicle, the leaf spring main body is provided with two protruding sections protruding upwards along the height direction of the vehicle, and the two protruding sections are connected with the lower swing arm. The two protruding sections are arranged between the two first connecting parts in the width direction of the vehicle in a spaced mode, and the protruding sections are configured to be used for being connected with an auxiliary frame. According to the plate spring, the structural strength of the plate spring can be well improved, the limit displacement amount of the first connecting part in the vertical direction is increased when the plate spring is subjected to buffering deformation, and therefore when wheels of a vehicle jump upwards, the plate spring can be always under the limit working condition, fatigue damage of the plate spring is well relieved, and the service life of the plate spring is prolonged. And the plate spring can be stably buffered, so that the service life of the plate spring is longer.

Description

[0001] This application is based on and claims priority to Chinese patent application No. 202311868595.8, filed on December 29, 2023, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The utility model relates to vehicle technical field especially is related to a leaf spring and have its suspension assembly and vehicle. BACKGROUND

[0003] The vehicle usually sets up the spring in the suspension and buffers the impact from the road, the spring is generally sleeved on the shock absorber and cooperates with the shock absorber, when the shock absorber is assembled with the spring, the arrangement of the shock absorber in the front and rear direction and the width direction of the vehicle is greatly limited by the spring, which makes it difficult for the shock absorber to reduce the arrangement height in the up and down direction, thereby making the Z-direction space of the passenger compartment smaller, making the passengers more uncomfortable.

[0004] Therefore, in the related art, a transversely arranged leaf spring is provided in the vehicle to replace the spring, thereby effectively increasing the arrangement space of the passenger compartment in the Z-direction and improving the comfort of the passengers. However, the leaf spring may be subject to fatigue damage when it is in operation in the vehicle, which shortens the service life of the leaf spring. SUMMARY

[0005] The present utility model is based on the discovery of the following facts and problems by the inventors of the present application:

[0006] The transversely arranged leaf spring is connected to the subframe and the vehicle, when the vehicle jumps up, the fixed point of the leaf spring connected to the vehicle moves upward relative to the connection point of the leaf spring and the subframe to form elastic deformation to absorb and buffer the vibration, when the jumping amplitude of the vehicle is too large, the fixed point of the leaf spring connected to the vehicle moves upward relative to the connection point of the leaf spring and the subframe too much, thereby exceeding the maximum deformation of the elastic deformation of the leaf spring, causing plastic deformation of the leaf spring, thereby intensifying the fatigue damage of the leaf spring in the long-term use, which shortens the service life of the leaf spring.

[0007] The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the present utility model proposes a leaf spring which can effectively alleviate the fatigue damage of the leaf spring and prolong the service life of the leaf spring.

[0008] The present utility model further proposes a suspension assembly having the above-mentioned leaf spring.

[0009] The present utility model further proposes a vehicle having the above-mentioned suspension assembly.

[0010] According to the leaf spring of the first aspect of the present utility model, the leaf spring includes: a leaf spring main body, the leaf spring main body extends along the width direction of the vehicle, and a first connecting part is provided at both ends of the leaf spring main body, the first connecting part is used to connect to the lower control arm of the vehicle, and the leaf spring main body is formed with two raised sections that protrude upward along the height direction of the vehicle, and the two raised sections are arranged between the two first connecting parts at intervals along the width direction of the vehicle, and the raised sections are configured to be used for connecting to the subframe.

[0011] According to the leaf spring of the present invention, a leaf spring body is provided, and first connecting parts connected to the lower swing arm are formed at both ends of the leaf spring body, and two raised sections are formed on the leaf spring body, so that the structural strength of the leaf spring is greatly improved, thereby increasing the maximum displacement of the first connecting part in the up and down directions when the leaf spring performs buffering deformation, so that when the vehicle wheel jumps, the leaf spring can always be below the limit working condition, thereby greatly reducing the fatigue damage of the leaf spring, allowing the leaf spring to stably perform buffering operations, and extending the service life of the leaf spring.

[0012] In addition, the leaf spring according to the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, the raised section has a first surface for abutting and connecting with the subframe, and the distance between the first surface and the center line of the first connection part in the vehicle height direction is a first spacing, wherein the first spacing is greater than the maximum deflection of the leaf spring at the position of the first connection part.

[0014] In one embodiment of the present invention, the raised section is formed by a portion of the leaf spring body that is raised from bottom to top.

[0015] In some examples of the present invention, the raised segment includes a body, and the first surface is formed on the body.

[0016] In some examples of the present invention, the raised section includes a body and a buffer member, the buffer member is formed on the body, and the first surface is formed on a surface of the buffer member on a side facing away from the body.

[0017] In some embodiments of the present invention, the leaf spring body includes: a main body section, the main body section is a flat plate extending along the width direction of the vehicle, the two raised sections are respectively connected to the two ends of the main body section along the width direction of the vehicle, and the two first connecting parts are respectively connected to the ends of the two raised sections away from the main body section.

[0018] In one embodiment of the utility model, the protruding section includes: a first plate portion, a second plate portion and a third plate portion, the first plate portion and the second plate portion are opposite and extend upwardly in the vehicle width direction, the lower end of the first plate portion is connected to the main body section, the lower end of the second plate portion is connected to the first connecting portion, the third plate portion is connected between the upper end of the first plate portion and the upper end of the second plate portion, and the third plate portion is used for connecting the auxiliary frame.

[0019] In some examples of the utility model, the third plate portion is a flat plate extending in the vehicle width direction.

[0020] In some examples of the utility model, the width and / or thickness of the second plate portion gradually decreases in the direction from the third plate portion to the first connecting portion.

[0021] In some examples of the utility model, the third plate portion is connected to the first plate portion and the second plate portion by an arc, and the protruding section is connected to the main body section and the first connecting portion by an arc.

[0022] In some examples of the utility model, the leaf spring further includes a buffer, and the buffer is arranged on the upper side surface of the third plate portion.

[0023] In one example of the utility model, the buffer includes: a sleeve portion, a first abutting portion and a first elastic connecting portion, the sleeve portion is sleeved on the third plate portion, the first abutting portion is arranged on the upper side of the sleeve portion, the first abutting portion is adapted to be connected to the auxiliary frame by abutting, and the first elastic connecting portion is connected between the sleeve portion and the first abutting portion.

[0024] In some specific embodiments of the utility model, the buffer further includes: a second abutting portion and a second elastic connecting portion, the second abutting portion is arranged on the lower side of the sleeve portion, the second elastic connecting portion is connected between the sleeve portion and the second abutting portion, and the second abutting portion is adapted to be connected to the connecting support for connecting the protruding section and the auxiliary frame by abutting.

[0025] In one specific embodiment of the utility model, in a horizontal projection plane, the projection of the first elastic connecting portion is located in the projection of the first abutting portion, and the projection of the second elastic connecting portion is located in the projection of the second abutting portion.

[0026] In some embodiments of the utility model, the leaf spring further includes: a first bushing, the first connecting portion is formed with a first connecting hole penetrating through the first connecting portion in the front-rear direction, and the first bushing is arranged in the first connecting hole.

[0027] The suspension assembly according to the second aspect of the present utility model includes the leaf spring according to the first aspect of the present utility model.

[0028] According to the suspension assembly of the present invention, by setting the leaf spring of the first aspect mentioned above, by setting the leaf spring main body, a first connecting part connected to the lower swing arm is formed at both ends of the leaf spring main body, and the leaf spring main body is formed with two raised sections, so that the structural strength of the leaf spring is greatly improved, thereby increasing the maximum displacement of the first connecting part in the up and down directions when the leaf spring performs buffering deformation, so that when the vehicle wheel jumps, the leaf spring can always be below the limit working condition, thereby greatly reducing the fatigue damage of the leaf spring, allowing the leaf spring to stably perform buffering operations, and extending the service life of the leaf spring.

[0029] In some embodiments of the present invention, the suspension assembly further includes a lower arm, and the number of the lower arms is two. The two lower arms are respectively arranged on both sides of the leaf spring in the width direction of the vehicle, and the leaf spring is rotatably connected to the lower arm through the first connecting portion.

[0030] In some embodiments of the present invention, the suspension assembly further includes a subframe, the subframe is disposed on an upper side of the leaf spring, and the raised section is connected to the subframe.

[0031] In some embodiments of the present invention, the suspension assembly further includes: a connecting bracket, and the raised section is connected to the subframe via the connecting bracket.

[0032] In one embodiment of the present invention, the connecting bracket is in the shape of a plate extending forward and backward, and is arranged on the lower side of the raised section. The front and rear ends of the connecting bracket extend upward and are connected to the subframe.

[0033] A vehicle according to a third aspect of the present utility model includes the suspension assembly according to the second aspect of the present utility model.

[0034] According to the vehicle of the present invention, by setting the suspension assembly of the second aspect mentioned above, the suspension assembly is provided with a leaf spring body, and the two ends of the leaf spring body are formed with a first connecting part connected to the lower arm, and the leaf spring body is formed with two raised sections, so that the structural strength of the leaf spring is greatly improved, thereby increasing the maximum displacement of the first connecting part in the up and down directions when the leaf spring is performing buffering deformation, so that when the wheel of the vehicle jumps, the leaf spring can always be below the limit working condition, thereby greatly reducing the fatigue damage of the leaf spring, allowing the leaf spring to stably perform buffering operations, and extending the service life of the leaf spring.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic view of a suspension assembly according to an embodiment of the present application;

[0037] Figure 2 is a sectional view of a suspension assembly and a wheel in a vehicle according to an embodiment of the present application;

[0038] Figure 3 is Figure 2 is a schematic view of a suspension assembly according to an embodiment of the present application;

[0039] Figure 4 is a schematic view of a suspension assembly according to an embodiment of the present application;

[0040] Figure 5 is a schematic view of a leaf spring according to an embodiment of the present application.

[0041] Reference signs:

[0042] 10, leaf spring;

[0043] 11, leaf spring body; 111, first connecting portion; 112, main body section;

[0044] 113, protruding section; 1131, first plate portion; 1132, second plate portion; 1133, third plate portion;

[0045] 12, damping member; 121, sleeve portion; 122, first abutting portion; 123, first elastic connecting portion; 124, second abutting portion; 125, second elastic connecting portion;

[0046] 13, first bushing;

[0047] 20, lower swing arm; 21, first supporting arm; 22, second supporting arm; 23, third supporting arm;

[0048] 30, connecting bracket; 40, knuckle; 50, subframe; 60, second bushing; 70, third bushing; 80, shock absorber;

[0049] 100, suspension assembly; 200, wheel;

[0050] 1000, vehicle. DETAILED DESCRIPTION

[0051] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0052] Reference will first be made to Figures 1-5 A vehicle 1000 according to a third aspect embodiment of the present application is briefly described. As shown in Figure 1 and Figure 2 shown, the vehicle 1000 according to an embodiment of the present application comprises a suspension assembly 100, the suspension assembly 100 comprising a leaf spring 10, a subframe 50 and a lower swing arm 20, the leaf spring 10 being connected between the subframe 50 and the lower swing arm 20.

[0053] A leaf spring 10 according to a first aspect embodiment of the present application is described below with reference to Figures 1-5

[0054] As shown in Figures 1-5 , the leaf spring 10 according to the first aspect embodiment of the present application comprises: a leaf spring body 11, the leaf spring body 11 extending along a width direction (e.g. the left-right direction as shown) of the vehicle 1000, both ends of the leaf spring body 11 being provided with a first connecting portion 111, the first connecting portion 111 being used to connect the lower swing arm 20 of the vehicle 1000, the leaf spring body 11 being formed with two protruding sections 113 protruding upward along a height direction (e.g. the up-down direction as shown) of the vehicle 1000, the two protruding sections 113 being arranged between the two first connecting portions 111 along the width direction of the vehicle 1000, the protruding section 113 being configured to be used to connect the subframe 50. Figure 2 Figure 2 In this embodiment, both ends of the leaf spring body 11 are provided with the first connecting portion 111, the leaf spring body 11 is formed with the two protruding sections 113 connected with the subframe 50, when the leaf spring 10 is assembled with the vehicle 1000, the two first connecting portions 111 of the leaf spring 10 are respectively connected with the lower swing arm 20, and the two protruding sections 113 are respectively connected with the subframe 50, so that when the vehicle 1000 is running and jolts and vibrations occur, the leaf spring 10 can be bent and deformed upward and downward (e.g. the up-down direction as shown) to play a good buffering role on the impact from the road surface, reduce the vibration of the subframe 50, and make the passengers more comfortable when riding the vehicle 1000.

[0055] Figure 2

[0056] ​​​​It can be understood that when the suspension assembly 100 of the vehicle 1000 is designed and manufactured, the maximum upward jump height of the suspension assembly 100 can be set to meet the use requirements of the vehicle 1000, and the maximum upward jump height of the suspension assembly 100 can refer to the maximum displacement of the suspension assembly 100 in the up-down direction when the wheels 200 of the vehicle 1000 jump, at this time, the part connected with the lower swing arm 20 of the leaf spring 10 is displaced and deformed upward relative to the part connected with the auxiliary frame 50 of the leaf spring 10, thereby forming the maximum displacement of the part connected with the lower swing arm 20 of the leaf spring 10 during operation. Specifically, when the suspension assembly 100 of the vehicle 1000 is designed and manufactured, the suspension assembly 100 jumps under the action of the preset maximum impact force, and the leaf spring 10 deforms and buffers under the action of the impact force, thereby forming the maximum displacement. When the part connected with the lower swing arm 20 of the leaf spring 10 frequently reaches or exceeds the limit working condition of the maximum displacement, the leaf spring 10 is prone to fatigue damage or even fatigue fracture, which reduces the buffering effect of the leaf spring 10 and leads to a decrease in the service life of the leaf spring 10.

[0057] In the embodiment, two upward protruding protruding sections 113 are formed on the leaf spring body 11, the protruding sections 113 are located between the first connecting parts 111 at both ends of the leaf spring 10, and the protruding sections 113 can well strengthen the structure of the leaf spring 10 and improve the structural strength of the leaf spring 10, so that the first connecting part 111 of the leaf spring 10 can have a smaller deformation displacement in the height direction of the vehicle 1000 under the action of the same maximum impact force, in other words, the displacement of the first connecting part 111 of the leaf spring 10 in the height direction of the vehicle 1000 can be below the limit working condition under the action of the same maximum impact force, thereby well reducing the fatigue damage of the leaf spring 10, enabling the leaf spring 10 to stably perform the buffering operation, and prolonging the service life of the leaf spring 10.

[0058] According to the leaf spring 10 in the embodiment of the utility model, the leaf spring body 11 is arranged, the first connecting part 111 connected with the lower swing arm 20 is formed at both ends of the leaf spring body 11, the leaf spring body 11 is formed with two protruding sections 113, the structural strength of the leaf spring 10 is well improved, and then the limit displacement amount of the first connecting part 111 in the up-down direction when the leaf spring 10 deforms and buffers is increased, so that the leaf spring 10 can always be below the limit working condition when the wheels 200 of the vehicle 1000 jump, thereby well reducing the fatigue damage of the leaf spring 10, enabling the leaf spring 10 to stably perform the buffering operation, and prolonging the service life of the leaf spring 10.

[0059] In some embodiments of the utility model, as shown in Figure 2As shown, the convex section 113 can have a first surface for abutting connection with the auxiliary frame 50, and the distance between the first surface and the center line of the first connecting portion 111 in the vehicle height direction is a first distance, wherein the first distance is greater than the maximum deflection of the leaf spring 10 at the position of the first connecting portion 111.

[0060] The maximum deflection refers to the displacement of the first connecting portion 111 in the vehicle 1000 height direction under the maximum up-jump height of the suspension after the leaf spring 10 is assembled with the lower swing arm 20 and the auxiliary frame 50. In the embodiment, the first distance is set to be greater than the maximum deflection of the leaf spring 10 at the position of the first connecting portion 111, that is, the first connecting portion 111 is always below the first surface when moving upward in the vehicle 1000 height direction, so that the leaf spring body 11 is less likely to be damaged and broken. Specifically, the leaf spring 10 is stretched and deformed when the first connecting portion 111 moves upward relative to the position of the first surface, and when the first connecting portion 111 moves upward too much, the tensile force on the leaf spring body 11 exceeds the range of tensile deformation, causing plastic deformation of the leaf spring 10, thereby accelerating the fatigue damage of the leaf spring 10 during long-term use and reducing the service life of the leaf spring 10.

[0061] In the embodiment, by setting the first distance to be greater than the maximum deflection of the leaf spring 10 at the position of the first connecting portion 111, the leaf spring 10 can be stably within the good tensile deformation range during use, thereby effectively delaying the fatigue damage of the leaf spring 10 and improving the service life of the leaf spring 10. For example Figure 2 As shown, h in the figure represents the first distance, and the first distance h is greater than the maximum deflection of the leaf spring 10 at the position of the first connecting portion 111.

[0062] In an embodiment of the utility model, as shown in Figure 2 As shown, the convex section 113 can be formed by a part of the leaf spring body 11 being raised upward from bottom to top.

[0063] In the embodiment, the part of the leaf spring body 11 is raised upward from bottom to top to form the convex section 113, which is simple in structure and convenient to process, and makes the overall leaf spring 10 more convenient and easy to assemble and arrange.

[0064] In some examples of the utility model, as shown in Figure 1 As shown, the convex section 113 can include a body, and the first surface is formed on the body.

[0065] In the embodiment, the convex section 113 includes a body, and the first surface for abutting with the auxiliary frame 50 is formed on the body, which is simple in structure and facilitates the connection and fixation of the leaf spring body 11 and the auxiliary frame 50.

[0066] In some examples of the utility model, as shown in Figure 5As shown, the protruding section 113 can include a body and a buffer piece, the first surface is formed on the side surface of the buffer piece away from the body.

[0067] The protruding section 113 in the embodiment is provided with a body and a buffer piece, the first surface is formed on the side of the buffer piece away from the body, when the plate spring body 11 is assembled with the auxiliary frame 50, the auxiliary frame 50 abuts against the buffer piece of the protruding section 113, and the buffer piece can play a buffering role, so that the connection and fixation of the plate spring 10 and the auxiliary frame 50 are more stable and reliable.

[0068] In some embodiments of the utility model, as shown in Figure 5 As shown, the plate spring body 11 can include: a main body section 112, the main body section 112 is a flat plate extending along the width direction of the vehicle 1000, two protruding sections 113 are respectively connected to the two ends of the main body section 112 along the width direction of the vehicle 1000, and two first connecting parts 111 are respectively connected to one end of the two protruding sections 113 away from the main body section 112.

[0069] In the embodiment, the main body section 112 is a flat plate extending along the width direction of the vehicle 1000, which is simple in structure and convenient to manufacture, the main body section 112 occupies less space in the height direction of the vehicle 1000, and the installation and arrangement of the plate spring 10 between the auxiliary frame 50 and the lower swing arm 20 are more convenient. In the embodiment, the two protruding sections 113 are respectively connected to the two ends of the main body section 112 along the width direction of the vehicle 1000, and the first connecting parts 111 are respectively connected to the protruding sections 113, so that the two first connecting parts 111 and the protruding sections 113 on the plate spring 10 can form a symmetrical structure in the width direction of the vehicle 1000, thereby making the plate spring 10 more stable in connection with the auxiliary frame 50 and the lower swing arm 20, and the plate spring 10 can stably perform buffering and damping operations.

[0070] In an embodiment of the utility model, as shown in Figure 5 As shown, the protruding section 113 can include: a first plate part 1131, a second plate part 1132 and a third plate part 1133, the first plate part 1131 and the second plate part 1132 extend towards each other and upwardly in the width direction of the vehicle, the lower end of the first plate part 1131 is connected to the main body section 112, the lower end of the second plate part 1132 is connected to the first connecting part 111, the third plate part 1133 is connected between the upper end of the first plate part 1131 and the upper end of the second plate part 1132, and the third plate part 1133 is used for connecting the auxiliary frame 50.

[0071] In the embodiment, the protruding section 113 is provided as a first plate portion 1131, a second plate portion 1132 and a third plate portion 1133, the first plate portion 1131 and the second plate portion 1132 cooperate to form a protruding structure extending upwardly and obliquely, and the first plate portion 1131, the second plate portion 1132 and the third plate portion 1133 cooperate to form the protruding section 113 of the leaf spring 10, thus simplifying the structure and facilitating the processing.

[0072] In some examples of the utility model, as shown in Figure 5 The third plate portion 1133 can be a flat plate extending along the width direction of the vehicle, thus facilitating the connection and fixation of the third plate portion 1133 with the subframe 50.

[0073] In some examples of the utility model, as shown in Figure 2 and Figure 5 In the direction from the third plate portion 1133 to the first connecting portion 111, the width and / or thickness of the second plate portion 1132 can gradually decrease.

[0074] In the embodiment, the width of the second plate portion 1132 can gradually decrease in the direction from the third plate portion 1133 to the first connecting portion 111, the thickness of the second plate portion 1132 can gradually decrease in the direction from the third plate portion 1133 to the first connecting portion 111, or both the width and the thickness of the second plate portion 1132 can gradually decrease in the direction from the third plate portion 1133 to the first connecting portion 111. Here, the direction from the third plate portion 1133 to the first connecting portion 111 refers to the direction from the third plate portion 1133 to the first connecting portion 111 connected with the protruding section 113 where the third plate portion 1133 is located in the width direction of the vehicle 1000.

[0075] In the embodiment, the width and / or thickness of the second plate portion 1132 is set to gradually decrease toward the first connecting portion 111, thus making the leaf spring 10 have a smaller volume at both ends in the width direction of the vehicle 1000, facilitating the connection of the leaf spring 10 with the lower swing arm 20, and reducing the interference between the first connecting portion 111 and other structural components when the first connecting portion 111 swings up and down, thus making the leaf spring 10 operate more stably during use.

[0076] In some examples of the utility model, as shown in Figure 2 and Figure 5As shown, the third plate part 1133 can be connected with the first plate part 1131 and the second plate part 1132 through a circular arc, and the convex section 113 can be connected with the main body section 112 and the first connecting part 111 through a circular arc.

[0077] In the embodiment, the third plate part 1133 is connected with the first plate part 1131 and the second plate part 1132 through a circular arc, and the convex section 113 is connected with the main body section 112 and the first connecting part 111 through a circular arc, so that the stress concentration of the leaf spring 10 during stretching deformation can be reduced, the leaf spring 10 can deform and buffer more stably and well, the fatigue damage of the leaf spring 10 during use can be reduced, and the service life of the leaf spring 10 is longer.

[0078] In some examples of the utility model, as shown in Figures 2-5 The leaf spring 10 can further include a buffer 12, and the buffer 12 is arranged on at least the upper side surface of the third plate part 1133.

[0079] The buffer 12 is arranged on at least the upper side surface of the third plate part 1133, that is, the buffer 12 can be arranged only on the upper side surface of the third plate part 1133, or the buffer 12 can be arranged on the upper side surface, the lower side surface, the front side surface and the rear side surface of the third plate part 1133. In the embodiment, the buffer 12 is arranged between the auxiliary frame 50 and the third plate part 1133, so that the impact of the leaf spring 10 on the auxiliary frame 50 during deformation can be alleviated, the connection and fixation of the leaf spring 10 and the auxiliary frame 50 are more stable, and the leaf spring 10 and the auxiliary frame 50 can be used stably and well in the vehicle 1000 without large extrusion and friction when the leaf spring 10 and the auxiliary frame 50 are directly connected.

[0080] In an example of the utility model, as shown in Figure 3 and Figure 5 The buffer 12 can include a sleeve part 121, a first abutting part 122 and a first elastic connecting part 123, the sleeve part 121 is sleeved on the third plate part 1133, the first abutting part 122 is arranged on the upper side of the sleeve part 121, the first abutting part 122 is suitable for abutting and connecting with the auxiliary frame 50, and the first elastic connecting part 123 is connected between the sleeve part 121 and the first abutting part 122.

[0081] When the leaf spring 10 deforms and buffers, the sleeve part 121 can deflect or displace in the height direction and the width direction of the vehicle 1000 along with the deformation of the leaf spring 10, the first elastic connecting part 123 can be reliably connected with the sleeve part 121 by elastic deformation to adapt to the change of the relative position of the sleeve part 121 and the auxiliary frame 50, so that the first abutting part 122 and the auxiliary frame 50 are reliably abutted and fixed, and then the leaf spring 10 can be stably connected with the auxiliary frame 50 during use.

[0082] In some specific embodiments of the utility model, as shown in Figure 3 The buffer 12 can further include a second abutting portion 124 and a second elastic connecting portion 125. The second abutting portion 124 is arranged on the lower side of the sleeve body portion 121, and the second elastic connecting portion 125 is connected between the sleeve body portion 121 and the second abutting portion 124. The second abutting portion 124 is adapted to abut and connect with the connecting bracket 30 for connecting the protruding section 113 and the auxiliary frame 50.

[0083] In the present embodiment, the second elastic connecting portion 125 and the second abutting portion 124 are arranged between the leaf spring 10 and the connecting bracket 30. When the leaf spring 10 deforms and buffers, the second elastic connecting portion 125 can reliably connect with the sleeve body portion 121 by elastic deformation to adapt to the change in the relative position of the sleeve body portion 121 and the connecting bracket 30. Thus, the second abutting portion 124 can stably and reliably abut and fix with the connecting bracket 30, so that the connecting bracket 30 can more stably connect and fix the leaf spring 10 with the auxiliary frame 50. The second elastic connecting portion 125 and the second abutting portion 124 can reduce the friction and collision caused by the direct contact between the connecting bracket 30 and the leaf spring 10, so that the connecting bracket 30 and the leaf spring 10 can be stably and well used in the vehicle 1000.

[0084] In one specific embodiment of the utility model, as shown in Figure 3 In the horizontal projection plane, the projection of the first elastic connecting portion 123 can be located within the projection of the first abutting portion 122, and the projection of the second elastic connecting portion 125 can be located within the projection of the second abutting portion 124.

[0085] In the present embodiment, the projection of the first elastic connecting portion 123 in the horizontal projection plane is located within the projection of the first abutting portion 122. When the first elastic connecting portion 123 is connected with the first abutting portion 122, it has a small connection area. When the first elastic connecting portion 123 deforms, the first abutting portion 122 can be less affected by the first elastic connecting portion 123, so that the first abutting portion 122 can maintain a good structural state and abut and connect with the auxiliary frame 50. The first elastic connecting portion 123 has a large space in the front-rear direction (e.g., the front-rear direction shown in Figure 5 The projection of the second elastic connecting portion 125 in the horizontal projection plane is located within the projection of the second abutting portion 124. When the second elastic connecting portion 125 deforms, the second abutting portion 124 can be less affected by the second elastic connecting portion 125, so that the second abutting portion 124 can maintain a good structural state and abut and connect with the connecting bracket 30. The second elastic connecting portion 125 has a large space in the front-rear direction (e.g., the front-rear direction shown in

[0086] The projection of the second elastic connecting part 125 is located in the projection of the second abutting part 124, the second elastic connecting part 125 has a small connecting area when being connected with the second abutting part 124, the second abutting part 124 can be less affected by the second elastic connecting part 125 when the second elastic connecting part 125 deforms, so that the second abutting part 124 can maintain a good structural state and abut and connect with the connecting bracket 30, the second elastic connecting part 125 can have a larger space in the front-rear direction and the vehicle 1000 width direction to deform stably, so that the change of the relative position between the sleeve part 121 and the second abutting part 124 can be better adapted to a certain extent, the impact of the deformation of the leaf spring 10 can be better buffered by the buffer 12, and the connection of the leaf spring 10 and the connecting bracket 30 is more stable.

[0087] In one specific example of the present application, as shown in Figure 3 and Figure 4 , the side surface of the first abutting part 122 facing the auxiliary frame 50 and / or the side surface of the second abutting part 124 away from the leaf spring body 11 can be formed with a positioning protrusion.

[0088] In the present embodiment, the positioning protrusion is formed on the side surface of the first abutting part 122 facing the auxiliary frame 50 and / or the side surface of the second abutting part 124 away from the leaf spring body 11, so that when the leaf spring 10 and the auxiliary frame 50 are assembled and fixed through the connecting bracket 30, the buffer 12 can be well positioned and assembled with the auxiliary frame 50 and / or the connecting bracket 30, so that the positioning of the buffer 12 is more convenient and the assembly is easier when the buffer 12 is assembled with the auxiliary frame 50 and the leaf spring 10, and the relative slipping of the buffer 12 and the auxiliary frame 50 and / or the connecting bracket 30 is well avoided after the buffer 12 is assembled with the leaf spring 10 and the auxiliary frame 50, so that the connection and fixation of the buffer 12 with the auxiliary frame 50 and / or the connecting bracket 30 are more stable and reliable.

[0089] For example, the side surface of the first abutting part 122 facing the auxiliary frame 50 can be formed with a positioning protrusion, the side surface of the second abutting part 124 away from the leaf spring body 11 can also be formed with a positioning protrusion, or both the side surface of the first abutting part 122 facing the auxiliary frame 50 and the side surface of the second abutting part 124 away from the leaf spring body 11 can be formed with a positioning protrusion.

[0090] In some embodiments of the present application, as shown in Figure 2 and Figure 5 , the leaf spring 10 can further include a first bushing 13, the first connecting part 111 is formed with a first connecting hole penetrating through the first connecting part 111 in the front-rear direction, and the first bushing 13 is arranged in the first connecting hole.

[0091] The first bushing 13 is arranged at the first connecting portion 111, and when the leaf spring 10 is connected with the lower swing arm 20, the leaf spring 10 can be connected with the lower swing arm 20 through the first bushing 13, so that the lower swing arm 20 can swing around the axis of the first connecting hole to meet the use requirement of the suspension, the first bushing 13 can play a role of energy absorption and vibration reduction, and the lower swing arm 20 and the leaf spring 10 form a certain damping and buffering effect.

[0092] Reference will be made to Figures 1-5 The suspension assembly 100 according to the second aspect of the present application is described.

[0093] The suspension assembly 100 according to the present application comprises the leaf spring 10 according to the first aspect of the present application.

[0094] According to the suspension assembly 100 of the present application, the leaf spring 10 according to the first aspect is arranged, the leaf spring 10 is provided with the leaf spring body 11, the two ends of the leaf spring body 11 are provided with the first connecting portion 111 connected with the lower swing arm 20, and the leaf spring body 11 is provided with two protruding sections 113, so that the structural strength of the leaf spring 10 is improved, and the limit displacement amount of the first connecting portion 111 in the up-down direction when the leaf spring 10 is deformed for buffering is increased, so that when the wheel 200 of the vehicle 1000 jumps, the leaf spring 10 can always be below the limit working condition, the fatigue damage of the leaf spring 10 is reduced, the leaf spring 10 can stably perform the buffering operation, and the service life of the leaf spring 10 is longer.

[0095] In some embodiments of the present application, as shown in Figure 1 and Figure 2 The suspension assembly 100 can further comprise the lower swing arm 20, the number of the lower swing arms 20 is two, the two lower swing arms 20 are arranged on the two sides of the leaf spring 10 in the width direction of the vehicle 1000, and the leaf spring 10 is rotatably connected with the lower swing arm 20 through the first connecting portion 111.

[0096] In the present embodiment, the suspension assembly 100 is arranged to connect the lower swing arm 20 with the leaf spring 10 on the two sides in the width direction of the vehicle 1000, can cooperate with the leaf spring 10 to better play the role of vibration isolation and buffering for the vehicle 1000, and make the driving comfort of the vehicle 1000 better.

[0097] In some embodiments of the present application, as shown in Figure 1 and Figure 2 The suspension assembly 100 can further comprise the auxiliary frame 50, the auxiliary frame 50 is arranged on the upper side of the leaf spring 10, and the protruding section 113 is connected with the auxiliary frame 50.

[0098] The auxiliary frame 50 is connected with the protruding section 113 in the embodiment, the auxiliary frame 50 can be well fixed to the leaf spring 10, a good mounting and fixing position is provided for the fixing of the leaf spring 10, the leaf spring 10 is arranged conveniently in the vehicle 1000, and the leaf spring 10 can be well damped and buffered in cooperation with the auxiliary frame 50.

[0099] In some embodiments of the utility model, as shown in Figure 4 The suspension assembly 100 can also include a connecting bracket 30, and the protruding section 113 is connected with the auxiliary frame 50 through the connecting bracket 30.

[0100] In the embodiment, the leaf spring 10 is connected with the auxiliary frame 50 through the connecting bracket 30, and the structure is simple and convenient to assemble.

[0101] In some embodiments of the utility model, as shown in Figure 4 The connecting bracket 30 can be a plate shape extending along the front and back, the connecting bracket 30 is arranged on the lower side of the protruding section 113, and the front and back ends of the connecting bracket 30 extend upward and are connected with the auxiliary frame 50.

[0102] When the leaf spring 10 is assembled with the auxiliary frame 50, the connecting bracket 30 is arranged on the lower side of the protruding section 113, the front and back ends of the connecting bracket 30 extend upward from the two sides of the leaf spring 10 in the front and back direction, the connecting bracket 30 is supported on the bottom of the leaf spring 10, the front and back ends of the connecting bracket 30 are connected with the auxiliary frame 50, the leaf spring 10 is fixed with the auxiliary frame 50 under the clamping action of the connecting bracket 30 and the auxiliary frame 50, and specifically, the buffer 12 on the protruding section 113 is clamped between the auxiliary frame 50, the leaf spring 10 and the connecting bracket 30 under the clamping action of the connecting bracket 30 and the auxiliary frame 50. Preferably, the connecting bracket 30 and the auxiliary frame 50 can be connected and fixed through fasteners.

[0103] In the embodiment, the connecting bracket 30 is provided in a plate shape extending along the front and back, which can be conveniently connected with the auxiliary frame 50, the connecting bracket 30 has a simple structure and is convenient to manufacture, and the connection and assembly of the leaf spring 10 and the auxiliary frame 50 are convenient and stable.

[0104] In some embodiments of the utility model, as shown in Figure 2 The suspension assembly 100 can also include a shock absorber 80, and the lower end of the shock absorber 80 is connected with the lower swing arm 20 and the upper end is used to connect the vehicle body.

[0105] The shock absorber 80 in the embodiment can play a good role in attenuating vibration, so that the vehicle body is more stable during driving of the vehicle 1000, and the driver and passenger have a good driving experience. In the embodiment, the leaf spring 10 is used to replace the original spring structure, so that the shock absorber 80 has a larger arrangement space in the front-rear direction and the width direction of the vehicle 1000 when arranged in the vehicle 1000.

[0106] Referring to Figure 2 As shown in the figure, the arrangement height of the shock absorber 80 in the up-down direction can be reduced to a certain extent, for example, the shock absorber can be arranged more obliquely along the width direction of the vehicle 1000 to reduce the overall height, so that the driver and passenger compartment has a larger arrangement space in the up-down direction, and the driver and passenger are more comfortable when sitting in the driver and passenger compartment. The shock absorber 80 has a larger external space, so that the heat dissipation effect of the shock absorber 80 is better.

[0107] In some embodiments of the utility model, as Figure 4 As shown in the figure, the lower swing arm 20 can include a first branch arm 21, a second branch arm 22 and a third branch arm 23, the first branch arm 21 extends along the width direction of the vehicle 1000 and is connected with the first connecting part 111, one end of the second branch arm 22 is connected with one end of the first branch arm 21 towards the auxiliary frame 50, the other end of the second branch arm 22 extends obliquely forward and towards the auxiliary frame 50, and the other end of the second branch arm 22 is rotatably connected with the auxiliary frame 50, one end of the third branch arm 23 is connected with one end of the first branch arm 21 towards the auxiliary frame 50, the other end of the third branch arm 23 extends obliquely backward and towards the auxiliary frame 50, and the other end of the third branch arm 23 is rotatably connected with the auxiliary frame 50.

[0108] In the embodiment, the lower swing arm 20 is provided with the first branch arm 21, the second branch arm 22 and the third branch arm 23, the first branch arm 21 is connected with the leaf spring 10 through the first bushing 13, the second branch arm 22 and the third branch arm 23 are rotatably connected with the auxiliary frame 50 in the front-rear direction respectively, the connection is more convenient, the lower swing arm 20 is more stable and reliable in connection and fixation with the auxiliary frame 50, and then the lower swing arm 20 can stably and reliably support the vehicle body of the vehicle 1000.

[0109] In the embodiment, the first branch arm 21 can rotate relative to the leaf spring 10, the second branch arm 22 is rotatably connected with the auxiliary frame 50, and the third branch arm 23 is rotatably connected with the auxiliary frame 50, so that the lower swing arm 20 and the auxiliary frame 50 and the lower swing arm 20 and the leaf spring 10 can rotate relative to each other, to a certain extent, the transmission of vibration can be reduced, the auxiliary frame 50 can maintain a stable structural state, and then the vehicle 1000 is more stable during driving.

[0110] In an embodiment of the utility model, as Figure 4As shown, the suspension assembly 100 may further include: a second bushing 60 and a third bushing 70. The second bushing 60 is fastened to the subframe 50. The second bushing 60 is formed with a second connecting hole that passes through the second bushing 60 front to back. The other end of the second arm 22 extends into the second connecting hole and is connected to the second bushing 60. The other end of the third arm 23 is formed with a third connecting hole that passes through the third arm 23 front to back. The third bushing 70 is arranged in the third connecting hole.

[0111] In this embodiment, the second arm 22 is connected to the subframe 50 via the second bushing 60, and the third arm 23 is connected to the subframe 50 via the third bushing 70, which can well meet the connection and fixation requirements of the lower arm 20 and the subframe 50. The second bushing 60 cooperates with the third bushing 70 and the first bushing 13 to play a good role in buffering and vibration isolation, so that the subframe 50 maintains good stability during the driving of the vehicle 1000, thereby providing the driver and passengers with a good driving experience.

[0112] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the suspension assembly 100 may further include a steering knuckle 40 , which is connected to a side of the lower arm 20 away from the leaf spring 10 , and is used to connect to the wheel 200 .

[0113] In this embodiment, the steering knuckle 40 is provided to meet the steering operation requirements of the vehicle 1000 , and has a simple structure and is easy to use.

[0114] Reference below Figures 1-5 A vehicle 1000 according to an embodiment of the third aspect of the present invention will be described.

[0115] A vehicle 1000 according to an embodiment of the present invention includes a suspension assembly 100 according to an embodiment of the second aspect of the present invention.

[0116] Other structures and operations of the vehicle 1000 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0117] According to the vehicle 1000 of the embodiment of the utility model, by setting the suspension assembly 100 of the above-mentioned second aspect embodiment, the suspension assembly is provided with a leaf spring 10, and the leaf spring 10 is provided with a leaf spring body 11. The two ends of the leaf spring body 11 are formed with a first connecting part 111 connected to the lower arm 20, and the leaf spring body 11 is formed with two raised sections 113, so that the structural strength of the leaf spring 10 is greatly improved, thereby increasing the maximum displacement of the first connecting part 111 in the upper and lower directions when the leaf spring 10 performs buffering deformation, so that when the wheel 200 of the vehicle 1000 jumps, the leaf spring 10 can always be below the limit working condition, thereby greatly reducing the fatigue damage of the leaf spring 10, so that the leaf spring 10 can stably perform buffering operations, and the service life of the leaf spring 10 is extended.

[0118] The following will refer to Figures 1-5 A vehicle 1000 according to a specific embodiment of the present invention is described.

[0119] like Figures 1-5 As shown, the vehicle 1000 includes a body and a suspension assembly 100. The suspension assembly 100 can be arranged at the front wheel position of the vehicle 1000, or at the rear wheel position of the vehicle 1000. This embodiment is described by taking the suspension assembly 100 arranged at the front wheel position of the vehicle 1000 as an example.

[0120] The suspension assembly 100 includes a subframe 50 , a lower suspension arm 20 , a connecting bracket 30 , a steering knuckle 40 , a shock absorber 80 and a leaf spring 10 . The subframe 50 is fixed to the bottom of the vehicle 1000, and there are two steering knuckles 40. The two steering knuckles 40 are respectively connected to the wheels 200 on both sides of the width direction of the vehicle 1000, and the steering knuckles 40 are connected to the lower control arm 20; the lower control arm 20 is an integral part, and the lower control arm 20 is formed with a first arm 21, a second arm 22 and a third arm 23. The first arm 21 is connected to the leaf spring 10, the second arm 22 is rotatably connected to the subframe 50 through the second bushing 60, and the third arm 23 is rotatably connected to the subframe 50 through the third bushing 70. The position where the second arm 22 is connected to the subframe 50 is located in front of the position where the third arm 23 is connected to the subframe 50; the shock absorber 80 is arranged vertically and the upper end extends obliquely toward the subframe 50 along the width direction of the vehicle 1000. The upper end of the shock absorber 80 is connected to the vehicle body and the lower end is connected and fixed to the lower control arm 20.

[0121] The plate spring 10 comprises a plate spring body 11, a buffer 12 and a first bushing 13, the plate spring body 11 extends along the width direction of the vehicle 1000 and two ends of the plate spring body 11 are formed with first connecting holes, the first connecting holes penetrate through the plate spring body 11 along the front-rear direction, the first bushing 13 is arranged in the first connecting hole, and the plate spring body 11 is rotatably connected with the first branch arm 21 through the first bushing 13; the plate spring body 11 is partially protruded to form two protruding sections 113 arranged along the width direction of the vehicle 1000, the protruding section 113 comprises a first plate section 1131, a second plate section 1132 and a third plate section 1133, the first plate section 1131 and the second plate section 1132 are oppositely arranged and extend upwardly and obliquely, and the upper end of the first plate section 1131 and the upper end of the second plate section 1132 are connected with the third plate section 1133 at both ends in the width direction of the vehicle 1000, so as to form the protruding section 113 of the plate spring body 11.

[0122] The buffer 12 is a rubber part, and the buffer 12 comprises a sleeve part 121, a first elastic connecting part 123, a first abutting part 122, a second elastic connecting part 125 and a second abutting part 124, the sleeve part 121 is sleeved on the third plate section, the first elastic connecting part 123 and the second elastic connecting part 125 are arranged on the upper and lower sides of the plate spring body 11 and connected with the sleeve part 121, and the first abutting part 122 and the second abutting part 124 are arranged on the upper and lower sides of the plate spring body 11 and connected with the first elastic connecting part 123 and the second elastic connecting part 125 respectively. The side surface of the first abutting part 122 facing the auxiliary frame 50 is formed with positioning protrusions, the positioning protrusions are three, and the positioning protrusions can be positioning columns and positioning blocks. The side surface of the second abutting part 124 facing the connecting support 30 is also formed with positioning protrusions.

[0123] The connecting support 30 extends forwardly and rearwardly and abuts against the surface of the second abutting part 124 on the lower side of the buffer 12, the connecting support 30 extends upwardly at both ends and is formed with a connecting flange fixed with the auxiliary frame 50, and the connecting support 30 is clamped with the auxiliary frame 50 to fix the buffer 12 and the third plate section 1133, so that the suspension assembly 100 is compact in structure.

[0124] According to the vehicle 1000 of the embodiment of the utility model, through the plate spring 10, the plate spring body 11 of the plate spring 10 is arranged, the two ends of the plate spring body 11 are formed with the first connecting part 111 connected with the lower swing arm 20, the plate spring body 11 is formed with two protruding sections 113, the structural strength of the plate spring 10 is greatly improved, and then the limit displacement amount of the first connecting part 111 in the up-down direction when the plate spring 10 is deformed in buffering is increased, so that when the wheel 200 of the vehicle 1000 jumps, the plate spring 10 can always be below the limit working condition, thereby the fatigue damage of the plate spring 10 is well alleviated, the plate spring 10 can stably perform the buffering operation, and the service life of the plate spring 10 is longer.

[0125] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0126] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0127] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0128] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0129] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A leaf spring, characterized in that: The leaf spring comprises: A leaf spring body, the leaf spring body extending in the vehicle width direction, a first connection portion being provided at both ends of the leaf spring body, the first connection portion being used to connect to the vehicle's lower control arm, the leaf spring body being formed with two raised sections protruding upward in the vehicle height direction, the two raised sections being arranged between the two first connection portions at intervals in the vehicle width direction, the raised sections being configured to connect to a subframe.

2. The leaf spring according to claim 1, wherein The raised section has a first surface for abutting and connecting with the subframe, and the distance between the first surface and the center line of the first connecting portion in the vehicle height direction is a first spacing. Wherein, the first spacing is greater than the maximum deflection of the leaf spring at the first connection portion.

3. The leaf spring according to claim 2, wherein: The raised section is formed by a portion of the leaf spring body protruding upward from bottom to top.

4. The leaf spring according to claim 3, wherein The raised segment includes a body, and the first surface is formed on the body.

5. The leaf spring according to claim 3, wherein The raised section includes a body and a buffer member, the buffer member is formed on the body, and the first surface is formed on a surface of the buffer member on a side away from the body.

6. The leaf spring according to claim 1, wherein The leaf spring body includes: a main body section, which is a flat plate extending along the width direction of the vehicle, the two raised sections are respectively connected to the two ends of the main body section along the width direction of the vehicle, and the two first connecting parts are respectively connected to the ends of the two raised sections away from the main body section.

7. The leaf spring according to claim 6, characterized in that The raised section includes: a first plate portion, a second plate portion, and a third plate portion. In the vehicle width direction, the first plate portion and the second plate portion extend toward each other and obliquely upward. The lower end of the first plate portion is connected to the main section, the lower end of the second plate portion is connected to the first connecting portion, and the third plate portion is connected between the upper ends of the first plate portion and the second plate portion, and the third plate portion is used to connect to the subframe.

8. The leaf spring according to claim 7, wherein: The third plate portion is a flat plate extending in the vehicle width direction.

9. The leaf spring according to claim 7, wherein: In a direction from the third plate portion toward the first connecting portion, the width and / or thickness of the second plate portion gradually decreases.

10. The leaf spring according to claim 7, wherein The third plate portion is connected to the first plate portion and the second plate portion in a circular arc, and the raised section is connected to the main body section and the first connecting portion in a circular arc.

11. The leaf spring according to claim 7, wherein A buffer member is further included, and the buffer member is at least provided on the upper side surface of the third plate portion.

12. The leaf spring according to claim 11, wherein The buffer component includes: a sleeve portion, a first abutting portion and a first elastic connecting portion, the sleeve portion is sleeved on the third plate portion, the first abutting portion is arranged on the upper side of the sleeve portion, the first abutting portion is suitable for abutting and connecting with the sub-frame, and the first elastic connecting portion is connected between the sleeve portion and the first abutting portion.

13. The leaf spring according to claim 12, wherein: The buffer component also includes: a second abutment portion and a second elastic connection portion, the second abutment portion is arranged on the lower side of the sleeve portion, the second elastic connection portion is connected between the sleeve portion and the second abutment portion, and the second abutment portion is suitable for abutting and connecting with a connecting bracket used to connect the raised section and the subframe.

14. The leaf spring according to claim 13, wherein In a horizontal projection plane, the projection of the first elastic connecting portion is located within the projection of the first abutting portion, and the projection of the second elastic connecting portion is located within the projection of the second abutting portion.

15. The leaf spring according to claim 1, wherein Also includes: The first bushing is formed with a first connection hole that passes through the first connection part in the front-to-back direction, and the first bushing is arranged in the first connection hole.

16. A suspension assembly, characterized in that: include: A leaf spring according to any one of claims 1 to 15.

17. The suspension assembly according to claim 16, characterized in that: It also includes two lower swing arms, which are respectively arranged on both sides of the leaf spring in the vehicle width direction, and the leaf spring is rotatably connected to the lower swing arm through the first connecting portion.

18. The suspension assembly according to claim 16, characterized in that The vehicle further comprises a sub-frame, which is arranged on the upper side of the leaf spring, and the raised section is connected to the sub-frame.

19. The suspension assembly according to claim 16, wherein: Also includes: A connecting bracket, through which the raised section is connected to the subframe.

20. The suspension assembly according to claim 19, wherein: The connecting bracket is in the shape of a plate extending forward and backward. The connecting bracket is arranged on the lower side of the raised section. The front and rear ends of the connecting bracket extend upward and are connected to the sub-frame.

21. A vehicle, characterized in that: Comprising a suspension assembly according to any one of claims 16-20.

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