Suspension device and electric automobile
By adopting a double-sided limit vibration isolation assembly and a rubber main spring design in the suspension device, the stability and noise problems of the motor assembly on the frame are solved, and the stable connection and noise reduction effect of electric vehicles are achieved.
Patent Information
- Application Number
- CN202311870250.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
AI Technical Summary
It is difficult for existing suspension devices to effectively control the stability of the motor assembly on the frame and reduce vibration and noise transmission. Especially when the motor power and torque increase, the single-sided limit structure and bonded vibration isolation gaskets are difficult to meet the performance requirements of electric vehicles.
A double-sided limit vibration isolation assembly is adopted, including a first limit vibration isolation member and a second limit vibration isolation member, which is fixedly connected by both sides of the suspension bracket, combined with the design of the rubber main spring and bushing, and realizes bidirectional limit and vibration isolation of the motor assembly to reduce vibration and noise transmission.
It improves the connection stability between the motor assembly and the frame, effectively reduces the vibration and noise transmission of the motor assembly, and improves the riding comfort of electric vehicles.
Smart Images
Figure CN120229078A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of electric vehicles, and more particularly, to a mounting device and an electric vehicle using the mounting device. Background Art
[0003] Compared with traditional fuel vehicles, the drive sources of electric vehicles are significantly different. Traditional fuel vehicles are driven by internal combustion engines, while electric vehicles are driven by electric motors. Compared with internal combustion engines, electric motors have very different structures. Electric motors are smaller in volume and lighter in weight. However, due to the different external characteristics of drive motors and traditional internal combustion engines, the torque response of electric motors is faster and the output torque is also very large.
[0004] As a very important elastic component of electric vehicles, the mounting plays a role in supporting the power assembly and restricting the movement of the power assembly, and can also effectively isolate vibrations. In related technologies, the mounting mainly adopts a single-sided limit configuration with a single rubber main spring structure, and some are traditional adhesive vibration isolation gaskets that need to be manually pasted. When the power and torque of the motor assembly are getting larger and larger, the single-sided limit structure is difficult to ensure the stability of the motor assembly and effectively reduce the generation of noise. The adhesive vibration isolation gasket is mainly pasted by hand, and both are difficult to meet the requirements for the performance of electric vehicles. Summary of the Invention
[0005] The purpose of the present disclosure is to provide a mounting device that has good vibration isolation performance and is convenient for installation.
[0006] To achieve the above purpose, the present disclosure provides a mounting device, including:
[0007] A mounting bracket having a first end and a second end disposed opposite to each other. The first end is used to connect the mounting bracket to the vehicle frame, and the second end is used to connect the mounting bracket to the motor assembly; a first limit vibration isolation component including a first limit vibration isolation member and a second limit vibration isolation member. The first limit vibration isolation member is fixedly connected to the first end of the mounting bracket through the first side in the thickness direction of the mounting bracket, and the second limit vibration isolation member is fixedly connected to the first end of the mounting bracket through the second side opposite to the first side in the thickness direction of the mounting bracket; and a second limit vibration isolation component fixedly connected to the second end.
[0008] Optionally, a first connection hole is provided at the first end of the mounting bracket. The first connection hole penetrates the first end of the mounting bracket. The first limit vibration isolation member and the second limit vibration isolation member are respectively located on opposite sides of the axis of the first connection hole and are press-fitted into the first connection hole.
[0009] Optionally, the first limiting vibration isolator and the second limiting vibration isolator include a connecting cylinder. A limiting flange is provided at an edge of one end of the connecting cylinder. A vibration isolation pad is provided on a side of the limiting flange away from the connecting cylinder. The connecting cylinder is configured to be in interference fit with the first connection hole. The limiting flange is used to snap the first limiting vibration isolator and the second limiting vibration isolator onto the suspension bracket.
[0010] Optionally, the first limiting vibration isolator further includes a rubber main spring and an inner core. The rubber main spring is located in the connecting cylinder of the first limiting vibration isolator. The inner core is located in the rubber main spring. The length of the connecting cylinder in the first limiting vibration isolator is greater than the length of the connecting cylinder in the second limiting vibration isolator.
[0011] Optionally, the vibration isolation pad is annular and fixedly connected to the limiting flange. A plurality of grooves are provided on a side of the vibration isolation pad away from the limiting flange. The grooves are evenly distributed along the circumferential direction of the vibration isolation pad.
[0012] Optionally, at least two second connection holes are provided at the second end of the suspension bracket. The second connection holes penetrate through the second end of the suspension bracket. A plurality of second limiting vibration isolation assemblies are also provided and are consistent in number with the second connection holes. The second limiting vibration isolation assemblies are in interference connection in the second connection holes.
[0013] Optionally, the second limiting vibration isolation assembly includes an outer sleeve, an inner sleeve and a bushing. The inner sleeve is located in the outer sleeve, and an annular gap is formed between the inner sleeve and the inner wall of the outer sleeve. The bushing is located in the annular gap and is connected to the inner wall of the outer sleeve and the outer wall of the inner sleeve. The outer sleeve can be in interference fit with the second connection hole.
[0014] Optionally, a connecting protrusion protruding from the suspension bracket is provided on a side of the inner sleeve away from the motor assembly. The second limiting vibration isolation assembly further includes a limiting baffle and a second bolt. The limiting baffle is in contact with the connecting protrusion. The second bolt sequentially passes through the limiting baffle, the inner sleeve and the motor assembly and is fixedly connected to the motor assembly.
[0015] Optionally, a connecting plate is provided between the limiting baffles between two adjacent second connection holes. The connecting plate is fixedly connected to the two limiting baffles. Limiting protrusions are provided on the suspension bracket. The limiting protrusions are located on opposite sides of the connecting plate and are used to limit the position of the connecting plate on the suspension bracket.
[0016] According to a second aspect of the present disclosure, an electric vehicle is further provided, including: a vehicle frame, a motor assembly, and the suspension device described in the above embodiments, wherein a first end of the suspension bracket is fixedly connected to the vehicle frame, and a second end is fixedly connected to the motor assembly.
[0017] Compared with the prior art, the advantages of the present disclosure are as follows: The suspension device of the present disclosure includes a suspension device, a first limiting and vibration isolation component, and a second limiting and vibration isolation component. Among them, the first limiting and vibration isolation component includes a first limiting and vibration isolation member and a second limiting and vibration isolation member. The two vibration isolation members are respectively located on both sides in the thickness direction of the suspension bracket, which can effectively control the displacement of the motor assembly on the vehicle frame, improve the stability of the connection between the motor assembly and the vehicle frame, and can also greatly reduce the vibration and noise transmission of the motor assembly through the first limiting and vibration isolation component and the second limiting and vibration isolation component.
[0018] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:
[0020] Figure 1 is a schematic structural diagram of the suspension device provided in an exemplary embodiment of the present disclosure;
[0021] Figure 2 is a schematic structural diagram of the suspension bracket in the suspension device provided in an exemplary embodiment of the present disclosure;
[0022] Figure 3 is a schematic structural diagram of the first limiting and vibration isolation member in the suspension device provided in an exemplary embodiment of the present disclosure;
[0023] Figure 4 is a schematic structural diagram of the second limiting and vibration isolation member assembly in the suspension device provided in an exemplary embodiment of the present disclosure.
[0024] DESCRIPTION OF REFERENCE NUMERALS
[0025] 1 - suspension bracket; 11 - first end; 111 - first connection hole; 12 - second end; 121 - second connection hole; 13 - limiting protrusion;
[0026] 2 - first limiting and vibration isolation component; 21 - first limiting and vibration isolation member; 211 - rubber main spring; 212 - inner core; 22 - second limiting and vibration isolation member; 23 - connecting cylinder; 231 - limiting flange; 232 - vibration isolation pad; 2321 - groove;
[0027] 3 - Second limiting vibration isolation component; 31 - Outer sleeve; 32 - Bushing; 33 - Inner sleeve; 331 - Connecting protrusion; 34 - Limiting baffle; 35 - Connecting plate. Detailed implementation manners
[0028] The following will describe in detail the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.
[0029] In the present disclosure, unless otherwise stated, the orientation terms such as "upper, lower, high, low, top, bottom" generally refer to the orientation of the corresponding components or structures in the direction of gravity, and specifically can refer to Figure 1 the direction of the drawing shown. "Inner, outer" refer to the inside and outside of the contour of the corresponding component. In addition, it should be noted that the terms such as "first, second" are used to distinguish one element from another, and do not have sequence and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements. The above definitions are only used to explain and illustrate the present disclosure, and should not be construed as a limitation to the present disclosure.
[0030] For the convenience of understanding, the following will refer to the attached Figures 1 to 4 drawings and describe in detail the specific structure and working principle of the suspension device of the present disclosure in combination with the embodiments.
[0031] In an embodiment of the present disclosure, referring to Figure 1 and Figure 2 , the suspension device includes a suspension bracket 1, a first limiting vibration isolation component 2, and a second limiting vibration isolation component 3. The suspension bracket 1 constitutes the main body of the entire suspension device. The suspension bracket 1 can provide an installation basis for other components on the suspension device. The suspension bracket 1 is usually made of a metal material, so as to have better strength and stability. The suspension bracket 1 includes a first end 11 and a second end 12. Through the first end 11, the suspension bracket 1 can be connected to the vehicle frame, and through the second end 12, the suspension bracket 1 can be connected to the motor assembly, so as to play a role in connecting the motor assembly to the vehicle frame.
[0032] The first limiting vibration isolation assembly 2 includes a first limiting vibration isolator 21 and a second limiting vibration isolator 22. Among them, the first limiting vibration isolator 21 is fixedly connected to the first end 11 of the suspension bracket 1 through the first side in the thickness direction of the suspension bracket 1, and the second limiting vibration isolator 22 is fixedly connected to the first end 11 of the suspension bracket 1 through the second side opposite to the first side in the thickness direction of the suspension bracket 1. With such a setting, it can be ensured that limiting vibration isolators are provided on both sides in the thickness direction of the suspension bracket 1. Compared with the traditional single-sided setting of the limiting vibration isolation assembly, it can limit the suspension device in two directions, avoid large displacements between the suspension device and the vehicle frame during operation, improve the stability of the suspension device, and since the vibration isolation and limiting assemblies are provided on both sides, it also has good vibration isolation performance.
[0033] The second limiting vibration isolation assembly 3 is fixedly connected to the second end 12 of the suspension bracket 1. Through the second limiting vibration isolation assembly 3, the vibration transmission of the motor assembly can be attenuated, effectively improving the high-frequency noise of the motor assembly and enhancing the riding comfort of the vehicle.
[0034] In an embodiment of the present disclosure, refer to Figure 1 and Figure 2 , a first connection hole 111 is provided on the first end 11 of the suspension bracket 1. The first connection hole 111 is a through hole penetrating the first end 11 of the suspension bracket 1. The first limiting vibration isolator 21 and the second limiting vibration isolator 22 can be fixedly connected to the first end 11 of the suspension bracket 1 through the first connection hole 111 and are respectively located on both sides of the first connection hole 111, so that the first limiting vibration isolator 21 and the second limiting vibration isolator 22 can be respectively located on both sides of the suspension bracket 1. In this embodiment, the connection manner between the first limiting vibration isolator 21 and the second limiting vibration isolator 22 and the first connection hole 111 is an interference fit connection. Connecting in this way has good stability and is convenient for processing. Of course, in other embodiments, the first limiting vibration isolator 21 and the second limiting vibration isolator 22 can also be fixed to the suspension bracket 1 in other ways, such as bonding, clamping, etc., or other connection methods known to those skilled in the art, which will not be elaborated here.
[0035] In an embodiment of the present disclosure, refer to Figure 1 and Figure 3, the first limiting vibration isolation member 21 and the second limiting vibration isolation member 22 include a connecting cylinder 23. The connecting cylinder 23 can be in interference fit with the first connecting hole 111, so that the first limiting vibration isolation member 21 and the second limiting vibration isolation member 22 can be connected to the first connecting hole 111 through the connecting cylinder 23. A limiting flange 231 is provided at the edge of one end of the connecting cylinder 23. When installing the first limiting vibration isolation member 21 and the second limiting vibration isolation member 22, it is necessary to insert the end of the connecting cylinder 23 without the limiting flange 231 into the first connecting hole 111 until the limiting flange 231 at the other end of the connecting cylinder 23 abuts against the suspension bracket 1, then the installation can be completed. The limiting flange 231 can facilitate the installation of the connecting cylinder 23 and also improve the stability of the first limiting vibration isolation member 21 and the second limiting vibration isolation member 22 in the first connecting hole 111.
[0036] A vibration isolation pad 232 is provided on the side of the limiting flange 231 away from the connecting cylinder 23. When both the first limiting vibration isolation member 21 and the second limiting vibration isolation member 22 are connected to the first connecting hole 111, the vibration isolation pads 232 on the limiting flanges 231 of both can abut against the vehicle frame when the suspension bracket 1 is installed on the vehicle frame, thereby reducing the vibration transmitted from the motor assembly to the vehicle frame.
[0037] In an embodiment of the present disclosure, refer to Figure 1 and Figure 3 , the vibration isolation pad 232 is annular and fixedly connected to the limiting flange 231. The way of fixed connection can be vulcanized on the limiting flange 231 or can be bonding, etc. The present disclosure does not limit this. A plurality of grooves 2321 are provided on the side of the vibration isolation pad 232 away from the limiting flange 231. The plurality of grooves 2321 are evenly distributed along the circumferential direction of the vibration isolation pad 232. The shape of the grooves 2321 can be rectangular or circular, and penetrate through the inner ring and the outer ring of the vibration isolation pad 232. By providing the grooves 2321, the noise generated after the vibration isolation pad 232 contacts and rubs against the vehicle frame can be reduced, thereby improving the performance of the suspension device and the user experience during use. Of course, in other embodiments, other structures can also be provided on the vibration isolation pad 232, such as annular grooves, or dot-like protrusions are provided on the vibration isolation pad 232, etc., which can all play a certain role in reducing noise, and can be determined according to the actual situation specifically. The present disclosure does not limit this.
[0038] In an embodiment of the present disclosure, refer to Figure 1 and Figure 3, the first limiting vibration isolator 21 further includes a rubber main spring 211 and an inner core 212. The rubber main spring 211 is located in the connecting cylinder 23 of the first limiting vibration isolator 21, and the inner core 212 is located in the rubber main spring 211. A bolt hole is provided on the inner core 212, and the bolt can connect the first limiting vibration isolator 21 to the vehicle frame through the inner core 212, thereby connecting the suspension bracket 1 to the vehicle frame. Through the rubber main spring 211, the vibration transmitted from the motor assembly to the inner core 212 can be effectively reduced, the stability of the suspension bracket 1 on the vehicle frame can be improved, and a small amount of noise can be reduced.
[0039] In this embodiment, refer to Figure 3 , the length of the connecting cylinder 23 in the first limiting vibration isolator 21 is greater than the length of the connecting cylinder 23 in the second limiting vibration isolator 22. With such a setting, on the one hand, the rubber main spring 211 and the inner core 212 are located in the first limiting vibration isolator 21, and the longer connecting cylinder 23 can better wrap and stabilize the rubber main spring 211 and the inner core 212 in the suspension bracket 1. On the other hand, a longer connecting cylinder 23 is designed in the first limiting vibration isolator 21 and a shorter connecting cylinder 23 is designed in the second limiting vibration isolator 22, which can also facilitate the installation of the second limiting vibration isolator 22.
[0040] In an embodiment of the present disclosure, refer to Figure 1 and Figure 2 , at least two second connection holes 121 are provided on the second end 12 of the suspension bracket 1, and the second connection holes 121 are through holes penetrating the second end 12 of the suspension bracket 1. At least two second limiting vibration isolation assemblies 3 are also provided, and the number is the same as that of the second connection holes 121, and the second limiting vibration isolation assemblies 3 can be fixedly connected to the second end 12 of the suspension bracket 1 through the second connection holes 121. In this embodiment, the connection method between the second limiting vibration isolation assembly 3 and the second connection hole 121 is an interference fit connection. By connecting in this way, it has good stability and is convenient for processing. Of course, in other embodiments, the second limiting vibration isolation assembly 3 can also be fixed to the suspension bracket 1 in other ways, such as bonding, clamping, etc., or other connection methods known to those skilled in the art, which will not be elaborated here.
[0041] In an embodiment of the present disclosure, refer to Figure 1 and Figure 4, the second limiting vibration isolation component 3 includes an outer sleeve 31, an inner sleeve 33 and a bushing 32. Among them, the inner sleeve 33 is located in the outer sleeve 31, and an annular gap can be formed between the inner sleeve 33 and the outer sleeve 31. The bushing 32 is located in the annular gap and is fixedly connected to the inner wall of the outer sleeve 31 and the outer wall of the inner sleeve 33. The outer sleeve 31 can be in interference fit with the second connection hole 121, so that the second limiting vibration isolation component 3 can be connected in the second connection hole 121. The bushing 32 can be made of rubber material, and the rubber material has a good vibration isolation effect. The connection mode between the bushing 32, the inner sleeve 33 and the outer sleeve 31 can also be vulcanization connection. Of course, in other embodiments, the structure of the second limiting vibration isolation component 3 and the material of the bushing 32 can also be of other types, which can be determined according to the actual situation, and the present disclosure does not limit this.
[0042] In an embodiment of the present disclosure, refer to Figure 1 and Figure 4 , a connecting protrusion 331 protruding from the suspension bracket 1 is provided on the side of the inner sleeve 33 away from the motor assembly. The second limiting vibration isolation component 3 further includes a limiting baffle 34 and a second bolt. The limiting baffle 34 is in contact with the connecting protrusion 331 on the inner sleeve 33. When the suspension bracket 1 needs to be fixedly connected to the motor assembly, the connecting end of the second bolt needs to pass through the limiting baffle 34, the connecting protrusion 331 and the inner sleeve 33 in sequence, and finally be fixedly connected to the motor assembly, while the flange end of the second bolt will abut against the limiting baffle 34, thereby completing the fixation of the suspension bracket 1 and the motor assembly.
[0043] Since the limiting baffle 34 is in contact with the connecting protrusion 331 on the inner sleeve 33, there will be a gap between the limiting baffle 34 and the suspension bracket 1 with a length equivalent to that of the connecting protrusion 331. Since the bushing 32 is usually made of a flexible material capable of isolating vibration, when the power of the motor assembly is relatively large, the inner sleeve 33 and the bushing 32 will be driven by the second bolt to move relative to the outer sleeve 31. At this time, the limiting baffle 34 can block the continuous movement of the inner sleeve 33 and the bushing 32, and the distance that the inner sleeve 33 and the bushing 32 can move can also be limited by the gap between the limiting baffle 34 and the suspension bracket 1, so as to avoid damage to the second limiting vibration isolation component 3 due to the inability of the inner sleeve 33 and the bushing 32 to move and the resulting large impact force.
[0044] Of course, in other embodiments, connection protrusions 331 can be provided on both sides of the inner sleeve 33. With such a setting, when the staff assembles the inner sleeve 33 and the suspension bracket 1, they can avoid the steps of first observing the position of the connection protrusion 331 on the inner sleeve 33 and then installing the inner sleeve 33, and directly install the inner sleeve 33, thereby improving the assembly speed and convenience between the inner sleeve 33 and the suspension bracket 1. Moreover, by providing connection protrusions 331 at both ends of the inner sleeve 33, the connection protrusion 331 at one end of the inner sleeve 33 can be used to cooperate with the limit baffle 34, and the connection protrusion 331 at the other end can abut against the installation point of the motor assembly. When the motor moves towards the limit baffle 34, the vibration transmission of the motor assembly is reduced through the buffering of the bushing 32.
[0045] In one embodiment of the present disclosure, referring to Figure 1 and Figure 4 , a connecting plate 35 is provided on the limit baffle 34 between two adjacent second connection holes 121. One end of the connecting plate 35 is fixedly connected to one of the limit baffles 34, and the other end is connected to the other limit baffle 34. The two limit baffles 34 can be connected into an integral body through the connecting plate 35. A limit protrusion 13 is further provided on the suspension bracket 1. According to the length, shape, etc. of the connecting plate 35, there can be multiple limit protrusions 13, which are located on opposite sides of the connecting plate 35. The position of the connecting plate 35 on the suspension bracket 1 can be limited through the limit protrusion 13, which can play a certain guiding role for the connecting plate 35 and facilitate the installation and disassembly of the limit baffle 34 by the staff.
[0046] In this embodiment, referring to Figure 1 and Figure 2 , the second end 12 of the suspension bracket 1 has two branches away from the first end 11. Two second connection holes 121 and second limit vibration isolation components 3 are provided on each branch. Two limit protrusions 13 are provided between the two connection holes 121. The connecting plate 35 is rectangular, and the width is equal to the distance between the two limit protrusions 13. When the limit baffle 34 needs to be installed, only by snapping the connecting plate 35 between the two limit protrusions 13, the position of the limit baffle 34 can be fixed to a certain extent, thereby facilitating the subsequent installation of the second bolt. Of course, in other embodiments, the number of the connection holes 121 and the second limit vibration isolation components 3 can also be more, for example, three are provided, and the connecting plate 35 can connect three limit baffles 34. The specific structure can be determined according to the actual situation, and the present disclosure does not limit this.
[0047] When assembling the suspension device of the present disclosure, first, the installation of the first limiting and vibration isolation component 2 can be carried out. The connecting cylinder 23 of the first limiting and vibration isolation member 21 and the second limiting and vibration isolation member 22 is interference-fitted into the first connecting hole 111 on the suspension bracket 1 until the limiting flange 231 on both of them abuts against the suspension bracket 1. Then, the installation of the second limiting and vibration isolation component 3 is carried out, and the outer sleeve 31 is interference-fitted into the second connecting hole 121 on the suspension bracket 1.
[0048] After the assembly is completed, it is necessary to connect the suspension bracket 1 to the vehicle frame and the motor assembly. First, the connection between the suspension bracket 1 and the vehicle frame can be carried out. The first limiting and vibration isolation component 2 is connected to the vehicle frame by passing bolts through the inner core 212. Then, the suspension bracket 1 is connected to the motor assembly. The second limiting and vibration isolation component 3 is finally connected to the motor assembly by passing the second bolt through the limiting baffle 34 and the inner sleeve 33 in sequence, thereby completing the connection between the vehicle frame, the motor assembly and the suspension device. In the suspension device of the present disclosure, by arranging limiting and vibration isolation members on both sides of the suspension bracket 1, the displacement of the suspension device relative to the vehicle frame during the operation of the motor assembly can be reduced, the stability of the suspension device on the vehicle frame can be improved, and the cooperation between the first limiting and vibration isolation component 2 and the second limiting and vibration isolation component 3 can effectively reduce the transmission of vibration and noise of the motor assembly.
[0049] In the second aspect of the present disclosure, an electric vehicle is further provided. The electric vehicle of the present disclosure includes the suspension device described in the above embodiments. The motor assembly in the electric vehicle can be connected to the vehicle frame through the suspension device, which can effectively reduce the vibration transmitted from the motor assembly to the vehicle frame and can also reduce the generation of noise to a certain extent. In this embodiment, the structures, connection relationships, and positional relationships of the various components of the suspension device and the corresponding assembly and installation processes are the same as those of the suspension device described in the above description of the present disclosure, and will not be elaborated here.
[0050] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
[0051] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.
[0052] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.
Claims
1. A suspension device, characterized in that, Comprising: A suspension bracket having a first end and a second end disposed opposite to each other. The first end is used to connect the suspension bracket to the vehicle frame, and the second end is used to connect the suspension bracket to the motor assembly. A first limiting and vibration isolation assembly including a first limiting and vibration isolation member and a second limiting and vibration isolation member. The first limiting and vibration isolation member is fixedly connected to the first end of the suspension bracket through the first side in the thickness direction of the suspension bracket, and the second limiting and vibration isolation member is fixedly connected to the first end of the suspension bracket through the second side opposite to the first side in the thickness direction of the suspension bracket. A second limiting and vibration isolation assembly fixedly connected to the second end.
2. The suspension device according to claim 1, characterized in that A first connection hole is provided at the first end of the suspension bracket, and the first connection hole penetrates through the first end of the suspension bracket. The first limiting and vibration isolation member and the second limiting and vibration isolation member are respectively located on opposite sides of the axis of the first connection hole and are press-fitted into the first connection hole.
3. The suspension device according to claim 2, wherein, The first limiting and vibration isolation member and the second limiting and vibration isolation member include a connecting cylinder. A limiting flange is provided at the edge of one end of the connecting cylinder, and a vibration isolation pad is provided on the side of the limiting flange away from the connecting cylinder. The connecting cylinder is configured to be press-fitted with the first connection hole, and the limiting flange is used to snap the first limiting and vibration isolation member and the second limiting and vibration isolation member onto the suspension bracket.
4. The suspension device according to claim 3, characterized in that, The first limiting and vibration isolation member further includes a rubber main spring and an inner core. The rubber main spring is located in the connecting cylinder of the first limiting and vibration isolation member, and the inner core is located in the rubber main spring. The length of the connecting cylinder in the first limiting and vibration isolation member is greater than the length of the connecting cylinder in the second limiting and vibration isolation member.
5. The suspension device according to claim 3, characterized in that, The vibration isolation pad is annular and fixedly connected to the limiting flange. A plurality of grooves are provided on the side of the vibration isolation pad away from the limiting flange, and the grooves are evenly distributed along the circumferential direction of the vibration isolation pad.
6. The suspension device according to claim 1, characterized in that At least two second connection holes are provided at the second end of the suspension bracket, and the second connection holes penetrate through the second end of the suspension bracket. A plurality of second limiting and vibration isolation assemblies are also provided, and the number is the same as that of the second connection holes. The second limiting and vibration isolation assemblies are press-fitted into the second connection holes.
7. The suspension device according to claim 6, characterized in that, The second limiting and vibration isolation assembly includes an outer sleeve, an inner sleeve, and a bushing. The inner sleeve is located in the outer sleeve, and an annular gap is formed between the inner sleeve and the inner wall of the outer sleeve. The bushing is located in the annular gap and is connected to the inner wall of the outer sleeve and the outer wall of the inner sleeve. The outer sleeve can be press-fitted with the second connection hole.
8. The suspension device according to claim 7, characterized in that, A connecting protrusion protruding from the suspension bracket is provided on the side of the inner sleeve away from the motor assembly. The second limiting and vibration isolation assembly further includes a limiting baffle and a second bolt. The limiting baffle is in contact with the connecting protrusion, and the second bolt sequentially passes through the limiting baffle, the inner sleeve, and the motor assembly and is fixedly connected to the motor assembly.
9. The suspension device according to claim 8, characterized in that, A connecting plate is provided between the limiting baffles adjacent to two adjacent second connecting holes. The connecting plate is fixedly connected to the two limiting baffles. A limiting protrusion is provided on the suspension bracket. The limiting protrusion is located on opposite sides of the connecting plate and is used to limit the position of the connecting plate on the suspension bracket.
10. An electric vehicle, characterized in that, Comprising: A vehicle frame, a motor assembly, and the suspension device according to any one of claims 1-9, wherein a first end of the suspension bracket is fixedly connected to the vehicle frame, and a second end thereof is fixedly connected to the motor assembly.