Electric vehicle suspension structure and vehicle including the same

Abstract

The present invention discloses an electric vehicle suspension structure and a vehicle including the suspension structure, wherein the suspension structure comprises an upper rocker arm, an upper rocker arm support connecting the upper rocker arm and a vehicle frame; a lower rocker arm, a lower rocker arm support connecting the lower rocker arm and a vehicle frame; a wheel side reducer and a wheel hub motor; and the wheel hub motor is located between the upper rocker arm and the lower rocker arm. The upper ball head support and the lower ball head support are welded and respectively installed on the electric wheel assembly by bolts. The upper rocker arm support seat and the lower rocker arm support seat are respectively welded to the bottom longitudinal beam of the frame to form an integral structure. In order to realize the integrated installation of the motor and the wheel side, the lower rocker arm support is designed as a bending structure, and the upper ball head support seat and the lower ball head support seat on the electric wheel assembly are respectively designed as structures extending above and below the center line of the axle, which can reserve installation space for the motor on the one hand, and shorten the length of the upper and lower rocker arms on the other hand, and enhance the rigidity.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle structures, and in particular to an electric vehicle suspension structure and a vehicle comprising the suspension structure. Background Art

[0002] The main structural feature of the suspension of a distributed drive four-wheel independent steering electric vehicle is that the drive motor and steering system are distributed to each wheel. It has a short power transmission chain, efficient transmission, few mechanical connections, compact structure, and high space utilization in the vehicle. Distributed drive independent steering electric vehicles can achieve a variety of dynamic controls and have good maneuverability and stability. At present, the commonly used solution for the structural realization of distributed drive independent steering electric vehicles is to equip each wheel with a wheel hub / wheel side drive motor and an electric steering system.

[0003] The public patent document "Suspension and steering system for distributed drive independent steering electric vehicles" (application number: CN201610020862.X) sets a steering knuckle outside the hub motor and connects it to the first rocker arm through the steering knuckle, so that a single wheel has a large steering angle capability. However, this structure sets the hub motor in the wheel. Since brakes and other structures are also required in the wheel, when a larger motor needs to be arranged, the space in the rim will not be able to accommodate the motor and the brake at the same time.

[0004] Distributed drive four-wheel independent steering electric vehicle suspension is currently unable to solve the problem of limited space when arranging the wheel hub motor structure.

[0005] The prior patent application "An integrated electric wheel and vehicle" (application number: CN201710749828.0) proposed to set a brake inside the rim, set a hub motor outside the rim, and connect the steering knuckle to the hub motor to connect the suspension swing arm. However, the axial dimension of this structure is too long, and the connection strength is greatly reduced. At the same time, the axial distance from the electric wheel set to the center of the vehicle cannot be fully utilized, and the design space of the suspension structure is limited. Summary of the invention

[0006] In order to overcome the above defects of the prior art, the present invention provides an electric vehicle suspension structure and a vehicle including the suspension structure, which is convenient for the arrangement of the wheel hub motor, and the technical solution is as follows:

[0007] As a first aspect of the present invention, it is to provide an electric vehicle suspension structure having an upper rocker arm and a lower rocker arm of a unique form; specifically, the electric vehicle suspension structure comprises an upper rocker arm, an upper rocker arm support connecting the upper rocker arm and a vehicle frame;

[0008] A lower rocker arm, a lower rocker arm support connecting the lower rocker arm and the frame;

[0009] Wheel reducer and wheel hub motor;

[0010] The upper rocker arm includes two single walls connected into a Y-shaped structure;

[0011] The lower rocker arm comprises two single arms cross-connected to each other at one end, each single arm has a bending angle of 25° to 35° and is bent upward;

[0012] The wheel hub motor is located between the upper rocker arm and the lower rocker arm. This structure shortens the axial length of the wheel hub and expands the distance and space between the wheel hub and the frame.

[0013] Preferably, the upper rocker arm is connected to the upper end of the wheel-side reducer, and the lower rocker arm is connected to the lower end of the wheel-side reducer.

[0014] The reducer can be a fixed-axis gear train reducer, so that the motor is eccentrically arranged to increase the ground clearance of the motor.

[0015] However, in this structure, since the wheel hub motor is located between the upper rocker arm and the lower rocker arm, when the wheel bounces, the upper rocker arm and the lower rocker arm swing, which is likely to cause interference with the wheel hub motor; at the same time, considering that one end of the upper and lower rocker arms are connected to the frame and the other end is connected to the wheel hub structure, if the overall length of the rocker arm is long, it will affect the stiffness and service life of the rocker arm; in order to avoid interference and extend the service life of the rocker arm, the present invention also designs a new structure for the upper rocker arm, the lower rocker arm, the upper rocker arm support seat and the lower rocker arm support seat.

[0016] Preferably, the upper rocker arm also includes an upper rocker arm connecting plate at the bottom end of the Y-shape and an upper rocker arm sleeve at the top end of the Y-shape single wall. A shock-absorbing spring support is also arranged on the upper surface of the upper rocker arm. The shock-absorbing spring support is welded by two side plates and a bottom plate, and is hinged to the shock-absorbing spring through the shock-absorbing spring support. The other end of the shock-absorbing spring is connected to the vehicle body. The upper rocker arm sleeve is hinged to the upper rocker arm support, and the upper rocker arm connecting plate is welded and hinged to the upper ball head support. The upper rocker arm is an integral welded structure to provide support for the shock-absorbing spring.

[0017] Preferably, the lower rocker arm connecting plate is connected to the cross position of the single wall in the lower rocker arm, and a lower rocker arm sleeve is welded to the top end respectively. A transverse support rod is also arranged between the single walls, and the lower rocker arm sleeve is connected to the lower rocker arm support through a pin shaft; the lower rocker arm connecting plate is hinged by welding with the lower ball head support.

[0018] Preferably, the upper rocker arm support is welded into a V-shaped structure by steel plates, and the bottom is welded to the longitudinal beam at the bottom of the frame to form an integral structure. The left and right upper parts of the V-shape extend obliquely upward on both sides of the longitudinal beam at the bottom of the frame, and are rotatably connected to the upper rocker arms on the left and right sides.

[0019] Preferably, the upper rocker arm support includes a front end plate, a rear end plate, an upper right cover plate and an upper left cover plate, the front end plate and the rear end plate have the same structure, including a left side wall and a right side wall, the front end plate and the rear end plate are respectively provided with rectangular openings at the bottom, the angle range between the left side wall and the right side wall is 70° to 80°, and upper rocker arm fixing pin shaft connecting holes are respectively provided on the top, and the rectangular openings are welded and fixed to the bottom longitudinal beam of the frame.

[0020] Taking into account the requirements for vehicle weight reduction, the upper rocker arm support is equipped with 6 left-right symmetrical weight reduction holes and irregular strip weight reduction holes to reduce the weight as much as possible without affecting the strength.

[0021] Preferably, the lower rocker arm support is formed by welding four connecting plates and the longitudinal beam, and the connecting plates are grouped in pairs; the connecting plates are welded and fixed to the bottom end of the longitudinal beam through the rectangular opening at the top; two pin holes are respectively arranged on both sides below the connecting plates, and are respectively pinned to the two lower rocker arms on both sides through the pin holes.

[0022] Since the wheel hub motor is arranged between the upper and lower rocker arms, in order to achieve spatial layout and reduce the force on the rocker arms, upper and lower ball head support welds are provided on the electric wheel assembly, including an upper ball head support weld connected to the upper rocker arm, and a lower ball head support weld connected to the lower rocker arm.

[0023] Preferably, the upper ball head support weld and the lower ball head support weld respectively include a left support vertical plate, an upper connecting plate of the pin shaft, a right support vertical plate, a lower connecting plate of the pin shaft, an end vertical plate and a bottom plate; the left and right sides of the upper connecting plate of the pin shaft and the lower connecting plate of the pin shaft are respectively welded to the left support vertical plate and the right support vertical plate, and the rear is welded to the end vertical plate, and the lower ends of the left support vertical plate, the right support vertical plate and the end vertical plate are plane welded to the bottom plate; in order to shorten the length of the upper rocker arm, the shape of the upper ball head support weld is designed to be a polygonal structure; the bottom plate of the upper ball head support weld is fixedly connected to the upper end of the wheel-side reducer, and the bottom plate of the lower ball head support weld is fixedly connected to the lower end of the wheel-side reducer.

[0024] Furthermore, the left support vertical plate and the right support vertical plate welded to the upper ball head support also include an inclined portion, which is a triangle or a quadrilateral and is used to raise the position of the connection with the upper rocker arm, thereby shortening the length of the upper rocker arm and avoiding the loss of strength caused by the excessive length of the upper rocker arm, thereby extending its service life.

[0025] In order to avoid interference between the upper rocker arm and the hub motor when the wheel jumps, the geometric center of the left and right support vertical plates welded with the upper ball head support is designed to be closer to the frame relative to the base plate, and the upper connecting plate and the lower connecting plate of the pin shaft are respectively at an angle of 30° to 35° with the base plate. After the upper rocker arm is installed, the end connected to the frame is tilted upwards, and the gap between the upper rocker arm and the drive motor gradually increases.

[0026] Preferably, the lower ball head support weld is integrally provided with a weight-reducing hole to facilitate vehicle weight reduction. By calculating the motion trajectory of the upper and lower rocker arms, the upper connecting plate and the lower connecting plate of the pin shaft of the lower ball head support weld are respectively designed to be at an angle of 80° to 85° with the bottom plate, which is convenient for the installation of the lower rocker arm on the one hand, and avoids the phenomenon of the ball head connection being damaged due to the inconsistency between the rotation angle of the lower rocker arm ball head and the motion trajectory of the lower rocker arm.

[0027] Preferably, one end of the upper rocker arm is rotatably connected to the longitudinal beam at the bottom of the frame through an upper rocker arm support, and the other end is welded to the wheel-side reducer through an upper ball head support; one end of the lower rocker arm is rotatably connected to the longitudinal beam at the bottom of the frame through a lower rocker arm support, and the other end is welded to the wheel-side reducer through a lower ball head support; one end of the wheel-side reducer is arranged on the wheel hub, and the other end is connected to the wheel hub motor; the wheel hub motor is located between the upper rocker arm and the lower rocker arm, in a space surrounded by the upper rocker arm, the lower rocker arm, the wheel-side reducer, the upper rocker arm support and the lower rocker arm support.

[0028] In order to avoid interference between the upper rocker arm or the lower rocker arm and the hub motor when the wheel bounces up and down, the geometric center of the left supporting upright plate and the right supporting upright plate is designed to be closer to the frame relative to the bottom plate, and the upper connecting plate and the lower connecting plate of the pin shaft form angles with the bottom plate respectively. After the upper rocker arm is installed, the closer it is to the frame, the higher the installation height, the larger the gap with the drive motor, and the less likely interference problems will occur.

[0029] In order to increase the ground clearance of the vehicle, when designing the lower rocker arm, the height of the installation point is raised as much as possible while ensuring that the lower rocker arm does not interfere with the wheel hub motor. Therefore, the lower rocker arm is designed to be an upward bending structure.

[0030] As a second aspect of the present invention, there is provided a vehicle, the vehicle comprising the suspension structure; the vehicle is selected from a mountain off-road vehicle, an all-terrain vehicle or a racing electric vehicle.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The upper rocker arm, the lower rocker arm and the mounting structure thereof provided by the present invention can realize the effect of integrated mounting of the wheel hub motor and the wheel edge assembly. The present invention arranges the wheel hub motor between the upper rocker arm and the lower rocker arm, and this structure shortens the axial length of the wheel hub and expands the distance and space between the wheel hub and the frame.

[0033] 2. The upper ball head support welding provided by the present invention can raise the upper rocker arm installation support point without changing the wheel side structure, so that the upper rocker arm installation point is away from the kingpin center and closer to the frame; by raising the installation point of the upper rocker arm, the length and installation angle of the upper rocker arm can be reduced, the impact of vehicle vibration and stress on the rocker arm can be reduced, and the failure rate in use can be reduced.

[0034] 3. The upper rocker arm support provided by the present invention provides longitudinal space for the arrangement of the wheel hub motor, shortens the length of the upper rocker arm in the lateral dimension, realizes the load-bearing capacity transition between the upper rocker arm and the bottom longitudinal beam of the frame, and avoids the stress concentration caused by the direct connection between the upper rocker arm and the bottom longitudinal beam of the frame.

[0035] 4. The present invention reasonably analyzes the interference between the lower rocker arm and the wheel hub motor, and designs the lower rocker arm into an upward bending structure, so that the lower rocker arm support structure on the frame is designed above the lower plane of the frame, thereby improving the ground clearance of the whole vehicle.

[0036] 5. The present invention provides a technical solution for realizing direct connection between the wheel hub motor and the wheel-side reducer, thereby improving the driver's control over the vehicle drive and enhancing driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0038] Figure 1 This is an oblique view of the suspension structure of an electric vehicle according to the present invention;

[0039] Figure 2 This is a front view of an electric vehicle suspension structure according to the present invention;

[0040] Figure 3 It is a schematic diagram of the upper rocker arm support of the present invention;

[0041] Figure 4 This is the appearance diagram of the lower rocker arm support connecting plate of the present invention;

[0042] Figure 5 This is a schematic diagram of the upper ball head support welding of the present invention;

[0043] Figure 6 It is a side view of the upper ball head support welding of the present invention;

[0044] Figure 7 This is a schematic diagram of the lower ball head support welding of the present invention;

[0045] Figure 8 It is a schematic diagram of the upper rocker arm of the present invention;

[0046] Fig. 9 Schematic diagram of the lower rocker arm of the present invention.

[0047] Among them, 1-lower rocker arm; 2-upper rocker arm; 3-upper rocker arm support; 4-lower rocker arm support; 5-upper ball head support welding; 6-lower ball head support welding; 7-longitudinal beam; 8-wheel hub motor; 9-shock absorber spring; 10-wheel side reducer;

[0048] 101-lower rocker arm sleeve, 102-lower rocker arm connecting plate, 103-support rod;

[0049] 201- shock-absorbing spring support, 202- upper rocker arm sleeve, 203- upper rocker arm connecting plate;

[0050] 301-front end plate, 302-rear end plate, 303-upper right cover plate, 304-upper left cover plate, 305-rectangular opening;

[0051] 501-left supporting vertical plate, 502-pin shaft upper connecting plate, 503-right supporting vertical plate, 504-pin shaft lower connecting plate, 505-end vertical plate, 506-bottom plate, 507-inclined portion. DETAILED DESCRIPTION

[0052] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Embodiment 1: An electric vehicle suspension structure

[0055] like Figure 1 and Figure 2 As shown, the electric vehicle suspension structure provided by the present invention comprises a lower rocker arm 1, an upper rocker arm 2, an upper rocker arm support 3, a lower rocker arm support 4, an upper ball head support weld 5 and a lower ball head support weld 6; one end of the upper rocker arm 2 is connected to the longitudinal beam 7 at the bottom of the frame through the upper rocker arm support 3, and the other end is connected to the wheel side reducer 10 through the upper ball head support weld 5; one end of the lower rocker arm 1 is connected to the longitudinal beam 7 at the bottom of the frame through the lower rocker arm support 4, and the other end is connected to the wheel side reducer 10 through the lower ball head support weld 6; the wheel hub motor 8 is connected to the wheel side reducer 10, and the wheel hub motor 8 is located between the upper rocker arm 2 and the lower rocker arm 1, in a space surrounded by the upper rocker arm, the lower rocker arm, the wheel side reducer, the upper rocker arm support and the lower rocker arm support. The reducer can select a fixed-axis gear train reducer to set the motor eccentrically and increase the ground clearance of the motor.

[0056] like Figure 3As shown, the upper rocker arm support 3 is welded into a V-shaped structure by steel plates, and is composed of a front end plate 301, a rear end plate 302, an upper right cover plate 303 and an upper left cover plate 304. The front end plate 301 and the rear end plate 302 have the same structure, including a left wall and a right wall. The front end plate 301 and the rear end plate 302 are respectively provided with rectangular openings 305 at the bottom, and the angle between the left wall and the right wall is in the range of 70° to 80°. The top is respectively provided with upper rocker arm fixing pin connection holes, and the rectangular openings 305 are welded and fixed to the bottom longitudinal beam 7 of the frame. The upper rocker arm support 3 is designed to extend obliquely upward to the frame, and is connected to the upper rockers on the left and right sides respectively through pins. The mounting point of the upper rocker arm 2 and the frame 7 is set above the frame and extends to one side. This structure can shorten the lateral distance between the upper rocker arm 2 and the frame 7, and shorten the length of the upper rocker arm 2.

[0057] As a typical embodiment, taking into account the requirements for weight reduction of the entire vehicle, a total of 6 left-right symmetrical weight reduction holes are arranged on the upper right cover plate and the upper left cover plate of the upper rocker arm support seat, and two irregular strip weight reduction holes are arranged on the front end plate and the rear end plate respectively, so as to reduce the weight as much as possible without affecting the strength.

[0058] like Figure 4 As shown, the lower rocker support 4 is formed by welding four connecting plates and longitudinal beams as shown in the figure, and the connecting plates are grouped in pairs; the connecting plates are welded and fixed to the bottom end of the longitudinal beam through the rectangular opening at the top; two pin holes are respectively set on both sides of the lower connecting plate, and are pinned to the two lower rocker arms 1 on both sides through the pin holes. Figure 5 As shown, the upper ball head support weld 5 is composed of a left support vertical plate 501, a pin shaft upper connecting plate 502, a right support vertical plate 503, a pin shaft lower connecting plate 504, an end vertical plate 505 and a bottom plate 506. The left and right sides of the pin shaft upper connecting plate 502 and the pin shaft lower connecting plate 504 are respectively welded to the left support vertical plate 501 and the right support vertical plate 503, and the rear is welded to the end vertical plate 505. The lower ends of the left support vertical plate 501, the right support vertical plate 503 and the end vertical plate 505 are welded to the upper plane of the bottom plate 506, and the whole is provided with weight reduction holes to facilitate weight reduction of the whole vehicle. The bottom plate 506 is connected to the upper end of the wheel side reducer 10 by four connecting bolts.

[0059] In order to reduce weight and facilitate installation, strip-shaped opening structures are designed on the left and right support plates, and process holes are designed on the end plates. In order to avoid interference between the upper rocker arm and the hub motor when the wheel jumps up, the geometric center of the left support plate 501 and the right support plate 503 is designed to be closer to the frame relative to the bottom plate 506, such as Figure 6 As shown, the upper connecting plate 502 of the pin shaft and the lower connecting plate 504 of the pin shaft respectively form an angle of 30° to 35° with the bottom plate 506. After the upper rocker arm is installed, the end connected to the frame is tilted upwards of the frame, and the gap between the upper rocker arm and the drive motor 8 is gradually increased.

[0060] like Figure 7 As shown, the lower ball head support weld 6 also includes a right support vertical plate, a left support vertical plate, a pin shaft upper connecting plate, an end vertical plate, a pin shaft lower connecting plate and a bottom plate. The upper connecting plate and the lower connecting plate of the pin shaft are welded to the right support vertical plate and the left support vertical plate on the left and right sides respectively, and the rear is welded to the end vertical plate. The lower ends of the right support vertical plate, the left support vertical plate and the end vertical plate 1 are welded to the upper plane of the bottom plate, and are connected to the lower end of the wheel side reducer 10 through the bottom plate. Weight reduction holes are provided as a whole to facilitate weight reduction of the whole vehicle. Through the calculation of the motion trajectory of the upper and lower rocker arms, the upper connecting plate and the lower connecting plate of the pin shaft of the lower ball head support weld are designed to be at an angle of 80° to 85° with the bottom plate respectively. On the one hand, it is convenient for the installation of the lower rocker arm, and on the other hand, it avoids the stress caused by the inconsistent motion trajectory. The increase in the angle here is prone to interference when the wheel jumps up and down.

[0061] For the convenience of installation, a process hole is designed on the end vertical plate 1. For the convenience of designing and installing the lower rocker arm, the upper and lower pin shaft mounting plates 1 are designed to have an angle less than 90° with the end vertical plate 1. The lower ball head support weld 6 is similar to the upper ball head support weld 5 in structure and function. The difference is that the left and right support vertical plates of the lower ball head support weld 6 are square, and the upper ball head support weld 5 is designed to be a polygonal structure in order to shorten the length of the upper rocker arm 2. Figure 6 As shown, the left support plate 501 and the right support plate 503 of the upper ball head support weld 5 include an inclined portion 507, and the inclined portion 507 is triangular or as shown in FIG. Figure 6 The quadrilateral shown is used to raise the position of the connection with the upper rocker arm, thereby shortening the length of the upper rocker arm 2, avoiding the loss of strength caused by the excessive length of the upper rocker arm, and thus extending its service life.

[0062] like Figure 8 As shown, the upper rocker arm 2 includes two single walls connected to form a Y-shaped structure, and also includes an upper rocker arm connecting plate 203 at the bottom end of the Y and upper rocker arm sleeves 202 on both sides of the top of the Y-shaped single wall. A shock-absorbing spring support 201 is also arranged on the upper surface of the upper rocker arm 2. The shock-absorbing spring support 201 is welded by two side plates and a bottom plate, and is hinged to the shock-absorbing spring 9 through the shock-absorbing spring support 201. The other end of the shock-absorbing spring 9 is connected to the vehicle body. The shock-absorbing spring 9 absorbs the vibration energy transmitted by the wheel to protect other parts of the vehicle from vibration damage; the upper rocker arm sleeve 202 is connected to the upper rocker arm support 3 through a pin shaft, as shown in FIG. Figure 6 As shown, the upper rocker arm connecting plate 203 is provided with a circular hole and is connected by welding 5 on the ball head support of the pin shaft. The upper rocker arm 2 is an integral welded structure to provide support for the shock absorbing spring.

[0063] like Figure 2 and 9As shown, the lower rocker arm 1 includes two single walls connected to each other at one end, each single arm has a bending angle of about 120°, and is bent upward. The cross position of the single wall is connected to the lower rocker arm connecting plate 102, and the top end is respectively welded to a lower rocker arm sleeve 101. A transverse support rod 103 is also arranged between the single walls, and the lower rocker arm sleeve 101 is connected to the lower rocker arm support 4 through a pin. The lower rocker arm connecting plate 102 is connected to the lower ball head support weld 6 through a pin. The lower rocker arm 1 is an integrally welded structure, which serves to connect the frame 7 and the wheel-side reducer 10.

[0064] like Figure 2 As shown, the upper rocker arm provided by the present invention, the lower rocker arm with a bent structure, the wheel-side reducer 21, the upper rocker arm support 3, and the lower rocker arm support 4 form a space approximately in a pentagon, which provides space for the arrangement of the wheel hub motor 8. At the same time, when the upper rocker arm and the lower rocker arm of the suspension swing up and down, there will be no interference with the wheel hub motor.

[0065] Embodiment 2: A vehicle

[0066] This embodiment provides a vehicle including the suspension structure described in Embodiment 1. The vehicle may be a variety of electric vehicle products such as a mountain off-road vehicle, an all-terrain vehicle, a racing vehicle, etc. The suspension structure provided by the present invention provides a technical solution for realizing direct connection between the wheel hub motor and the wheel side reducer, thereby improving the driver's control over the vehicle drive and improving driving comfort.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric vehicle suspension structure, comprising an upper rocker arm and an upper rocker arm support connecting the upper rocker arm and a vehicle frame; A lower rocker arm, a lower rocker arm support connecting the lower rocker arm and the frame; Wheel reducer and wheel hub motor; characterized in that, The upper rocker arm includes two single arms connected into a Y-shaped structure; The lower rocker arm comprises two single arms cross-connected to each other at one end, each single arm has a bending angle of 25° to 35° and is bent upward; The wheel hub motor is located between the upper rocker arm and the lower rocker arm; The upper rocker arm also includes an upper rocker arm connecting plate at the bottom end of the Y-shaped shape and an upper rocker arm sleeve at the top end of the Y-shaped single arm. A shock-absorbing spring support is also provided on the upper surface of the upper rocker arm, which is hinged to the shock-absorbing spring through the shock-absorbing spring support, and the other end of the shock-absorbing spring is connected to the vehicle body; the upper rocker arm sleeve is hinged to the upper rocker arm support, and the upper rocker arm connecting plate is welded and hinged to the upper ball head support; the lower rocker arm connecting plate is connected to the cross position of the single wall in the lower rocker arm, and the top end is respectively connected to a lower rocker arm sleeve, and a transverse support rod is also provided between the single walls, and the lower rocker arm sleeve is hinged to the lower rocker arm support; the lower rocker arm connecting plate is welded and hinged to the lower ball head support; The upper ball head support weld and the lower ball head support weld each include a left support vertical plate, an upper connecting plate of a pin shaft, a right support vertical plate, a lower connecting plate of a pin shaft, an end vertical plate and a bottom plate; the left and right sides of the upper connecting plate of the pin shaft and the lower connecting plate of the pin shaft are respectively welded to the left support vertical plate and the right support vertical plate, and the rear part is welded to the end vertical plate, and the lower ends of the left support vertical plate, the right support vertical plate and the end vertical plate are plane-welded to the bottom plate; the left support vertical plate and the right support vertical plate of the upper ball head support weld also include an inclined portion, and the inclined portion is a triangle or a quadrilateral; The upper ball head supports the upper connecting plate and the lower connecting plate of the pin shaft welded to the left supporting plate and the right supporting plate, and they are respectively at an angle of 30° to 35° with the bottom plate; The upper connecting plate of the pin shaft and the lower connecting plate of the pin shaft, which are welded to the lower ball head support, respectively form an angle of 80° to 85° with the bottom plate.

2. The electric vehicle suspension structure according to claim 1, characterized in that: The upper rocker arm is connected to the upper end of the wheel-side reducer, and the lower rocker arm is connected to the lower end of the wheel-side reducer.

3. The electric vehicle suspension structure according to claim 1, characterized in that: The upper rocker arm support is a V-shaped structure, and the bottom is an integral structure with the longitudinal beam at the bottom of the frame. The left and right upper parts of the V-shape extend obliquely upward on both sides of the longitudinal beam at the bottom of the frame, and are rotatably connected to the left and right upper rocker arms.

4. The electric vehicle suspension structure according to claim 3, characterized in that: The upper rocker arm support includes a front end plate, a rear end plate, an upper right cover plate and an upper left cover plate. The front end plate and the rear end plate have the same structure, including a left side wall and a right side wall. The front end plate and the rear end plate are respectively provided with rectangular openings at the bottom, and the angle between the left side wall and the right side wall is in the range of 70° to 80°. Upper rocker arm fixing pin shaft connecting holes are respectively provided on the top, and the rectangular openings are welded and fixed to the bottom longitudinal beam of the frame.

5. The electric vehicle suspension structure according to claim 1, characterized in that: The lower rocker arm support is formed by welding four connecting plates and longitudinal beams, and the connecting plates are grouped in pairs; the connecting plates are welded and fixed to the bottom end of the longitudinal beam through the rectangular opening on the top; two pin holes are respectively arranged on both sides below the connecting plates, and are pinned to the two lower rocker arms on both sides through the pin holes.

6. A vehicle, characterized in that: The electric vehicle suspension structure comprises any one of claims 1 to 5; the vehicle is selected from a mountain off-road vehicle, an all-terrain vehicle or a racing electric vehicle.

Images