Two-leaf-spring structure, balanced suspension and automobile

Abstract

The invention relates to a two-leaf spring structure, a balanced suspension and an automobile, and belongs to the field of two-leaf springs. Wherein the two leaf spring structures comprise a first leaf spring, and a first center hole is formed in the top of the first leaf spring; a second center hole is formed in the bottom of the second leaf spring, and a third center hole is formed in the top of the second leaf spring; one end of the connecting piece is connected with the first center hole, and the other end of the connecting piece is connected with the second center hole; and the cover plate is provided with a first positioning pin, the first positioning pin is inserted into the third center hole, the cover plate is further connected with a fixing assembly, and the fixing assembly is used for fixing the cover plate to the balance bearing hub. The design of a center through hole is omitted, the first center hole is formed in the top of the first leaf spring, the second center hole is formed in the bottom of the second leaf spring, and the third center hole is formed in the top of the second leaf spring, so that the problem of stress concentration can be reduced, and the overall structural strength is improved.

Description

Technical Field

[0001] The present application relates to the field of two-leaf springs, and in particular to a two-leaf spring structure, a balanced suspension and a car. Background Art

[0002] The original intention of the two-leaf spring design is to provide sufficient load-bearing capacity and guiding function to meet the needs of the vehicle suspension system. However, there may be some defects in the design, such as the size and shape of the center hole and the connection method of the bolt and nut, which may affect the fatigue life of the leaf spring.

[0003] The existing two-leaf spring center hole is a through hole structure. The center of the first and second leaf springs is a through hole. The first and second leaves are assembled into an assembly with a center bolt and a center bolt nut. This structure has a large stress on the tensile stress surface of the center hole, which causes the leaf spring assembly to frequently break at the center hole. Currently, the center hole breakage accounts for as much as 90% of the two-leaf spring breakages in the market. Therefore, the through hole structure of the center hole of the two-leaf spring affects the fatigue life of the leaf spring assembly. The leaf spring assembly can no longer play a guiding and load-bearing role, affecting the normal operation of the vehicle. Summary of the invention

[0004] The embodiments of the present application provide a two-leaf spring structure, a balanced suspension and a car to solve the defects in the related art that the center holes of the two leaf springs are through-hole structures, which affects the fatigue life of the leaf spring assembly, and the leaf spring assembly can no longer play a guiding and bearing role, thereby affecting the normal operation of the vehicle.

[0005] An embodiment of the present application provides a two-leaf spring structure, including: a first leaf spring, having a first center hole on the top; a second leaf spring, having a second center hole on the bottom and a third center hole on the top; a connecting piece, one end of which is connected to the first center hole and the other end is connected to the second center hole; a cover plate, having a first locating pin on it, the first locating pin is inserted into the third center hole, and a fixing assembly is also connected to the cover plate, and the fixing assembly is used to fix the cover plate on the balance bearing hub.

[0006] By adopting the above technical solution: a first center hole is set on the top of the first leaf spring, and drilling on the tension surface of the first leaf spring is eliminated, which helps to avoid stress concentration in this area, thereby improving the fatigue life and overall structural strength of the first leaf spring; a second center hole is set at the bottom of the second leaf spring, that is, a blind hole is set on the tension surface of the second leaf spring, which is not easy to cause stress concentration in the leaf spring, which also helps to improve the durability of the second leaf spring; the third center hole is also set by inserting with the first locating pin, so that the second leaf spring can be connected to the cover plate, and the first center hole on the first leaf spring and the second center hole and the third center hole on the second leaf spring are all blind holes, which helps to reduce stress concentration and further improve the bearing capacity of the leaf spring.

[0007] In some embodiments, the connecting member includes a second positioning pin, one end of the second positioning pin is connected to the first center hole, and the other end of the second positioning pin is connected to the second center hole.

[0008] By adopting the above technical solution: the second locating pin ensures that the two leaf springs can maintain precise alignment when connected by precisely matching the first center hole and the second center hole, making the connection between the first leaf spring and the second leaf spring simple and quick, and the insertion and removal of the second locating pin is relatively easy, thereby simplifying the assembly and disassembly process.

[0009] In some embodiments, the second positioning pin has a conical cross-section.

[0010] By adopting the above technical solution: the cross-section of the second locating pin is set to be conical, which can significantly reduce the error in the assembly process. The precise matching of the second locating pin helps to avoid deviation and misalignment in the assembly process, thereby improving the assembly quality and efficiency.

[0011] In some embodiments, the second center hole is made by stamping.

[0012] By adopting the above technical solution: the second center hole is made by stamping. Compared with the drilling process, the punching operation is simpler and less costly, which helps to reduce the overall manufacturing cost.

[0013] In some embodiments, the fixing assembly includes: a U-shaped bolt, which is mounted on the cover plate; a connecting ring, which is encircled on the balance bearing hub, and both ends of the connecting ring are provided with through holes, and both ends of the U-shaped bolt are respectively passed through the two through holes and connected with nuts.

[0014] By adopting the above technical solution: the U-shaped bolt is mounted on the cover plate, the connecting ring is embraced on the balancing bearing hub, and through holes are provided at both ends of the connecting ring. Finally, the two ends of the U-shaped bolt are respectively passed through the two through holes and connected with nuts, and the cover plate is fixed by tightening the nuts; when the cover plate is fixed, the first leaf spring and the second leaf spring are also firmly fixed on the balancing bearing hub, so that the first leaf spring and the second leaf spring are installed, and can effectively prevent rotation or displacement during use.

[0015] In some embodiments, the tightening torque of the nut is set to 930±8% Nm.

[0016] By adopting the above technical solution, appropriate tightening torque can generate sufficient friction between the nut and the U-bolt, thereby ensuring that the connected parts are tightly fixed together to prevent loosening, sliding or rotation.

[0017] In some embodiments, the cover plate is provided with a groove adapted to the U-shaped bolt, and the U-shaped bolt is pressed into the groove.

[0018] By adopting the above technical solution, the groove has a limiting effect on the U-bolt, thereby avoiding shaking and deviation.

[0019] An embodiment of the present application provides a balanced suspension, including the two leaf spring structures, a balanced bearing hub and a drive axle described above, wherein the middle parts of the first leaf spring and the second leaf spring are installed on the balanced bearing hub, and the two ends of the first leaf spring and the second leaf spring are connected to the drive axle.

[0020] By adopting the above technical solution: the balancing suspension improves the vehicle's handling performance and stability through the synergistic effect of the two-leaf spring structure, the balancing bearing hub and the drive axle. Especially when driving on uneven roads, the balancing suspension can effectively reduce the vehicle's roll and bumps, and improve the driver's confidence and safety.

[0021] In some embodiments, the balancing suspension further includes an iron limit block, which is used to be installed on the frame. Both ends of the first leaf spring and the second leaf spring are provided with extended sections, and the iron limit block abuts against the extended section of the second leaf spring.

[0022] By adopting the above technical solution: designing an iron limit block and setting an extended section on the second leaf spring, the iron limit block is abutted against the second leaf spring, thereby ensuring that the iron limit block has a buffering effect, which can further save costs compared to using an elastic limit block.

[0023] An embodiment of the present application provides a car, comprising the above-mentioned balancing suspension.

[0024] By adopting the above technical solution: the above-mentioned balanced suspension is adopted on the automobile, the overall structural strength is high, the breakage of the leaf spring structure can be reduced, and the cost is also reduced.

[0025] The beneficial effects of the technical solution provided by this application include:

[0026] The embodiments of the present application provide a two-leaf spring structure, a balanced suspension and a car. Compared with the prior art, the present application eliminates the through-hole design on the first leaf spring and the second leaf spring, and reduces the problem of stress concentration by setting a first center hole on the top of the first leaf spring and a second center hole on the bottom of the second leaf spring, thereby improving the overall structural strength. The first leaf spring and the second leaf spring are first connected under the action of a connecting member, and the first locating pin on the cover plate is connected to the third center hole under the action of a third center hole, a cover plate and a fixing assembly. The fixing assembly fixes the cover plate on the balanced bearing hub, thereby effectively realizing the installation of the first leaf spring and the second leaf spring. Compared with the prior art, the installation design of the center bolt is eliminated, which not only enables installation, but also increases structural strength and reduces the occurrence of breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the overall structure of the two leaf spring structures provided in the embodiment of the present application;

[0029] Figure 2 Provided for the embodiments of this application Figure 1 Sectional view along AA;

[0030] Figure 3 An exploded schematic diagram of a two-leaf spring structure provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of the overall structure of a balancing suspension provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the overall structure of a car provided in an embodiment of the present application;

[0033] Reference numerals:

[0034] 1. First leaf spring; 10. First center hole; 2. Second leaf spring; 20. Second center hole; 21. Third center hole; 3. Cover plate; 30. Groove; 4. First locating pin; 5. Second locating pin; 6. U-shaped bolt; 60. Nut; 7. Connecting ring; 80. Balance bearing hub; 81. Drive axle; 9. Iron limit block; 90. Extension section. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] The embodiments of the present application provide a two-leaf spring structure, a balanced suspension and a car, which can solve the defects that the center holes of the two leaf springs are through-hole structures, which affect the fatigue life of the leaf spring assembly, and the leaf spring assembly can no longer play a guiding and bearing role, thus affecting the normal operation of the vehicle.

[0037] Because the original intention of the design of the two-leaf spring is to provide sufficient load-bearing capacity and guiding function to meet the needs of the vehicle suspension system. However, there may be some defects in the design, such as the size and shape of the center hole and the connection method of the bolts and nuts, etc. These design factors may affect the fatigue life of the leaf spring. Especially when the center hole is designed as a through-hole structure, the stress concentration problem on the tensile stress surface is particularly prominent, which can easily lead to fracture. At present, the center hole fracture accounts for as high as 90% of the two-leaf spring fractures on the market, which reflects the quality and reliability problems of leaf spring products on the market. On the one hand, due to fierce market competition, some manufacturers have sacrificed product quality in order to reduce costs; on the other hand, due to manufacturers’ lack of understanding of the design, manufacturing and use environment of leaf springs, the product has defects. In order to solve this problem, this application starts from multiple aspects such as design, materials, manufacturing, use and market environment, and conducts comprehensive analysis and improvement.

[0038] See also Figures 1 to 3 As shown, the embodiment of the present application provides a two-leaf spring structure including: a first leaf spring 1, a second leaf spring 2, a connecting member and a cover plate 3. The first leaf spring 1 is a part of the structure, and a first center hole 10 is provided on its top; the second leaf spring 2 is also a key part of the structure, and a second center hole 20 is provided on its bottom and a third center hole 21 is provided on its top; one end of the connecting member is connected to the first center hole 10, and the other end is connected to the second center hole 20, so as to ensure that the first leaf spring 1 and the second leaf spring can be effectively connected; finally, a first positioning pin 4 is provided on the set cover plate 3, and the first positioning pin 4 is inserted into the third center hole 21, and the third center hole 21 is gap-matched to prevent forward and backward movement, so as to connect the cover plate 3 with the second leaf spring 2, and finally, a fixing assembly is also connected to the cover plate 3, and the fixing assembly is used to fix the cover plate 3 on the balance bearing hub 80. Thus, the first leaf spring 1 and the second leaf spring 2 are effectively installed on the balance bearing hub 80 together, and the normal use of the first leaf spring 1 and the second leaf spring 2 is realized, and the normal operation and stable performance of the equipment are ensured.

[0039] Compared with other related technologies that adopt the central through-hole design, the first central hole 10 is set on the top of the first leaf spring 1 of the present application, that is, a blind hole is drilled on the compression surface of the first leaf spring 1, and the drilling on the tension surface of the first leaf spring 1 is cancelled, which helps to avoid stress concentration in this area, thereby improving the fatigue life and overall structural strength of the first leaf spring 1. The second central hole 20 is set at the bottom of the second leaf spring 2, and the second central hole 20 is made by stamping, that is, a blind hole is set on the tension surface of the second leaf spring 2 by a punching process. Punching is not easy to produce stress concentration in the leaf spring, which also helps to improve the durability of the second leaf spring 2. In addition, a third central hole 21 is set, that is, a blind hole is drilled on the compression surface of the second leaf spring 2. The third central hole 21 is inserted with the first locating pin 4, so that the second leaf spring 2 can be connected to the cover plate 3, preparing for the subsequent installation of the first leaf spring 1 and the second leaf spring 2. And the second central hole 20 is made by stamping. Compared with the drilling process, the punching operation is simpler and the cost is lower, which helps to reduce the overall manufacturing cost. Generally speaking, the first center hole 10 on the first leaf spring 1 and the second center hole 20 and the third center hole 21 on the second leaf spring 2 are all blind holes, which helps to reduce stress concentration and further improve the bearing capacity of the leaf spring. No center bolt is used in the entire design, which not only simplifies the assembly process, but also reduces material costs and overall weight.

[0040] In addition, from the perspective of installation design, the connector and the first locating pin 4 make the connection between the first leaf spring 1, the second leaf spring 2 and the cover plate 3 simple and quick. At the same time, the design of the fixing assembly also facilitates fixing the cover plate 3 on the balance bearing hub 80, thereby simplifying the installation and maintenance process. The first leaf spring 1 and the second leaf spring 2 are connected by the first locating pin 4. This connection method not only ensures the precise alignment of the leaf spring, but also increases the overall structural strength of the leaf spring and optimizes the weight and cost, significantly improving the durability, reliability and market competitiveness of the leaf spring. These advantages and effects make the design scheme have broad application prospects and significant economic benefits in practical applications.

[0041] In the present application, the connecting member provided includes a second locating pin 5, one end of the second locating pin 5 is connected to the first center hole 10, and the other end is connected to the second center hole 20. The second locating pin 5 ensures that the two leaf springs can maintain precise alignment when connected by precisely matching the first center hole 10 and the second center hole 20. In addition, the cross-section of the second locating pin 5 is set to be conical, which can significantly reduce the error in the assembly process. The precise matching of the second locating pin 5 helps to avoid deviation and misalignment in the assembly process, thereby improving the assembly quality and efficiency. The design of the second locating pin 5 makes the connection between the first leaf spring 1 and the second leaf spring 2 simple and quick, and the insertion and removal operations of the second locating pin 5 are relatively easy, thereby simplifying the assembly and disassembly process.

[0042] In the present application, the fixing assembly includes a U-bolt 6 and a connecting ring 7. When in use, the U-bolt 6 is mounted on the cover plate 3; the connecting ring 7 is encircled on the balance bearing hub 80, and both ends of the connecting ring 7 are provided with through holes. Finally, the two ends of the U-bolt 6 are respectively passed through the two through holes and connected with nuts 60. By tightening the nuts 60, the cover plate 3 is firmly fixed. When the cover plate 3 is fixed, the first leaf spring 1 and the second leaf spring 2 are also firmly fixed on the balance bearing hub 80, so that the first leaf spring 1 and the second leaf spring 2 are installed, and rotation or displacement during use can be effectively prevented. Moreover, this connection scheme does not need to continue to drill installation holes on the first leaf spring 1 and the second leaf spring 2. Compared with the connection using the central bolt, the connection strength is increased, the cost is reduced, the bearing capacity on the first leaf spring 1 and the second leaf spring 2 is reduced, and the structure is reliable.

[0043] In the present application, the tightening torque of the nut 60 is set to 930±8% Nm. Appropriate tightening torque can generate sufficient friction between the nut 60 and the U-bolt 6, thereby ensuring that the connected parts are tightly fixed together to prevent loosening, sliding or rotation.

[0044] In the present application, a groove 30 adapted to the U-shaped bolt 6 is further provided on the cover plate 3, and the U-shaped bolt 6 is pressed into the groove 30. The groove 30 has a limiting effect on the U-shaped bolt 6 to avoid shaking and offset, and accurate assembly can be achieved without drilling holes on the balance bearing hub 80, reducing processing procedures and reducing manufacturing costs.

[0045] The implementation principle of the embodiment of the present application is: by using the second positioning pin 5 to connect the first leaf spring 1 and the second leaf spring 2, and then connecting the first positioning pin 4 with the second leaf spring 2, and finally fixing the first leaf spring 1 and the second leaf spring 2 on the balance bearing hub 80, specifically by connecting the U-bolt 6 on the cover plate 3, connecting the connecting ring 7 on the balance bearing hub 80, and then using the nut 60 to fix the U-bolt 6 with the connecting ring 7, the first leaf spring 1 and the second leaf spring 2 are installed. Due to the first center hole 10 set on the top of the first leaf spring 1, the drilling of the tension surface of the first leaf spring 1 is cancelled, which helps to avoid stress concentration in this area, thereby improving the fatigue life and overall structural strength of the first leaf spring 1; the second center hole 20 is set at the bottom of the second leaf spring 2, and the second center hole 20 is made by stamping, that is, a blind hole is set on the tension surface of the second leaf spring 2 by punching technology, and punching is not easy to generate stress concentration in the leaf spring, which also helps to improve the durability of the second leaf spring 2. In addition, the third center hole 21 is set, that is, a blind hole is drilled on the pressure surface of the second leaf spring 2. Generally speaking, the first center hole 10 on the first leaf spring 1 and the second center hole 20 and the third center hole 21 on the second leaf spring 2 are all blind holes, which helps to reduce stress concentration and further improve the bearing capacity of the leaf spring.

[0046] See also Figure 4 and Figure 5 The embodiment of the present application provides a balancing suspension, including the above-mentioned two-leaf spring structure, a balancing bearing hub 80 and a driving axle 81, wherein the middle parts of the first leaf spring 1 and the second leaf spring 2 are installed on the balancing bearing hub 80, and the two ends of the first leaf spring 1 and the second leaf spring 2 are connected to the driving axle 81. The balancing suspension improves the handling performance and stability of the vehicle through the synergistic effect of the two-leaf spring structure, the balancing bearing hub 80 and the driving axle 81. Especially when driving on uneven roads, the balancing suspension can effectively reduce the roll and bumping of the vehicle and improve the driver's confidence and safety.

[0047] The balancing suspension also includes an iron stopper 9, which is used to be installed on the vehicle frame. Both ends of the first leaf spring 1 and the second leaf spring 2 are provided with an extension section 90, and the iron stopper 9 abuts against the extension section 90 of the second leaf spring 2. Through the design of the iron stopper 9 and the provision of the extension section 90 on the second leaf spring 2, the iron stopper 9 abuts against the second leaf spring 2, thereby ensuring that the iron stopper 9 has a buffering effect, which can further save costs compared to the use of elastic stoppers. In order to improve the structural strength, an extension section 90 is also provided on the first leaf spring 1.

[0048] See also Figure 4 and Figure 5, the embodiment of the present application provides a car, including the above-mentioned balancing suspension. The balancing suspension includes two leaf spring structures, a balancing bearing hub 80 and a driving axle 81, wherein the middle parts of the first leaf spring 1 and the second leaf spring 2 are installed on the balancing bearing hub 80, and the two ends of the first leaf spring 1 and the second leaf spring 2 are connected to the driving axle 81. The two leaf spring structures include a first leaf spring 1, a first center hole 10 is provided on the top of the first leaf spring; a second leaf spring 2, a second center hole 20 is provided on the bottom of the second leaf spring, and a third center hole 21 is provided on the top of the second leaf spring; a connecting member, one end of which is connected to the first center hole 10, and the other end is connected to the second center hole 20; a cover plate 3, a first positioning pin 4 is provided on it, and the first positioning pin 4 is inserted in the third center hole 21, and a fixing component is also connected to the cover plate 3, and the fixing component is used to fix the cover plate 3 on the balancing bearing hub 80. During the actual processing of the automobile designed in the present application, the through hole design on the first leaf spring 1 and the second leaf spring 2 is cancelled, and a first center hole 10 is set on the top of the first leaf spring 1 and a second center hole 20 is set on the bottom of the second leaf spring 2, so as to reduce the problem of stress concentration and improve the overall structural strength. The first leaf spring 1 and the second leaf spring 2 are first connected with each other under the action of the connecting piece, and the first locating pin 4 on the cover plate 3 is connected with the third center hole 21 under the action of the third center hole 21, the cover plate 3 and the fixing assembly. The fixing assembly fixes the cover plate 3 on the balancing bearing hub 80, thereby effectively realizing the installation of the first leaf spring 1 and the second leaf spring 2. Compared with the prior art, the installation design of the center bolt is cancelled, which not only realizes the installation, but also increases the structural strength, reduces the possibility of breakage, and also reduces the cost.

[0049] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0050] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0051] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A two-leaf spring structure, characterized in that: include: A first leaf spring (1) having a first central hole (10) at the top thereof; A second leaf spring (2), having a second center hole (20) at its bottom and a third center hole (21) at its top; a connecting piece, one end of which is connected to the first center hole (10) and the other end of which is connected to the second center hole (20); A cover plate (3) is provided with a first positioning pin (4), the first positioning pin (4) is inserted into the third center hole (21), and the cover plate (3) is also connected to a fixing component, the fixing component is used to fix the cover plate (3) on the balance bearing hub (80).

2. A two-leaf spring structure as claimed in claim 1, characterized in that: The connecting member comprises a second positioning pin (5), one end of the second positioning pin (5) is connected to the first center hole (10), and the other end is connected to the second center hole (20).

3. A two-leaf spring structure as claimed in claim 2, characterized in that: The second positioning pin (5) has a conical cross section.

4. A two-leaf spring structure as claimed in claim 1, characterized in that: The second center hole (20) is made by stamping.

5. A two-leaf spring structure as claimed in claim 1, characterized in that: The fixing assembly comprises: A U-shaped bolt (6), wherein the U-shaped bolt (6) is mounted on the cover plate (3); A connecting ring (7) is encircled on the balancing bearing hub (80), and through holes are provided at both ends of the connecting ring (7). Both ends of the U-shaped bolt (6) pass through the two through holes and are connected to nuts (60).

6. A two-leaf spring structure as claimed in claim 5, characterized in that: The tightening torque of the nut (60) is set to 930±8% Nm.

7. A two-leaf spring structure as claimed in claim 5, characterized in that: The cover plate (3) is provided with a groove (30) adapted to the U-shaped bolt (6), and the U-shaped bolt (6) is pressed into the groove (30).

8. A balanced suspension, characterized in that: It comprises a two-leaf spring structure as described in any one of claims 1 to 7, a balancing bearing hub (80) and a drive axle (81), wherein the middle parts of the first leaf spring (1) and the second leaf spring (2) are mounted on the balancing bearing hub (80), and the two ends of the first leaf spring (1) and the second leaf spring (2) are connected to the drive axle (81).

9. A balanced suspension as claimed in claim 8, characterized in that: The balancing suspension further comprises an iron limit block (9) which is used for being mounted on a vehicle frame. Both ends of the first leaf spring (1) and the second leaf spring (2) are provided with an extended section (90), and the iron limit block (9) abuts against the extended section (90) of the second leaf spring (2).

10. An automobile, characterized in that: Comprising a balancing suspension as described in any one of claims 8-9.

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