Lifting chassis structure of small pure electric vehicle and small pure electric vehicle

Abstract

The utility model provides a lifting chassis structure of a small pure electric vehicle. The lifting chassis structure comprises a chassis body, a movable front suspension, a movable rear suspension, a front lifting device and a rear lifting device. The chassis body comprises a front auxiliary frame and a rear auxiliary frame, the front lifting device is connected to the movable front suspension and the front auxiliary frame, and the rear lifting device is connected to the movable rear suspension and the rear auxiliary frame. The front auxiliary frame or / and the rear auxiliary frame can be driven by the front lifting device or / and the rear lifting device to lift up and down relative to the movable front suspension or / and the movable rear suspension, so that the chassis main body is lifted upwards or lowered downwards along the height; the movable front suspension comprises two groups of shock absorbers and a steering assembly, and the two groups of shock absorbers are respectively connected to the steering assembly; the two groups of front lifting devices are distributed in a splayed shape; the two sets of front lifting devices correspond to the two sets of shock absorbers, and the adjacent front lifting devices are parallel to the shock absorbers.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric vehicle equipment especially a lifting chassis structure of small pure electric vehicle and small pure electric vehicle. BACKGROUND

[0002] In the traditional small pure electric vehicle chassis design, the chassis height is fixed, which is difficult to adapt to complex road conditions. For example, when passing through uneven road surface, the higher chassis can improve the passability, but will increase the wind resistance and energy consumption; while at high speed, the lower chassis can reduce the wind resistance, but is easy to scratch the chassis components.

[0003] With the rapid development of electric vehicle technology, the chassis structure design of small pure electric vehicle is also constantly innovated. In order to meet the driving needs in different road conditions, improve the passability, handling and comfort of the vehicle, the chassis lifting technology has gradually become a research hotspot. SUMMARY

[0004] The main technical problem to be solved by the utility model is to provide a lifting chassis structure of small pure electric vehicle, which meets the needs of lifting chassis of small pure electric vehicle.

[0005] In order to solve the above technical problems, the utility model provides a lifting chassis structure of small pure electric vehicle, which comprises a chassis body, a movable front suspension, a movable rear suspension, a front lifting device and a rear lifting device.

[0006] The chassis body comprises a front subframe and a rear subframe, the front lifting device is connected to the movable front suspension and the front subframe respectively, and the rear lifting device is connected to the movable rear suspension and the rear subframe respectively.

[0007] The front subframe or / and the rear subframe can be lifted up and down relative to the movable front suspension or / and the movable rear suspension through the driving of the front lifting device or / and the rear lifting device, so that the chassis body is lifted up or lowered down along the height.

[0008] The movable front suspension comprises two groups of shock absorbers and a steering assembly, and the two groups of shock absorbers are connected to the steering assembly respectively; the front lifting device is provided with two groups, and the two groups of front lifting devices are distributed in the shape of eight characters.

[0009] The two groups of front lifting devices correspond to the two groups of shock absorbers, and the adjacent front lifting devices and the shock absorbers are parallel to each other.

[0010] In a preferred embodiment, the front subframe comprises a space for placing the movable front suspension, the movable front suspension comprises a first mounting bracket for connecting the steering assembly and a second mounting bracket for connecting the front lifting device, and the first mounting bracket is connected with the second mounting bracket.

[0011] The front sub-frame further comprises a collision-preventing assembly cooperating with the first mounting frame when the front sub-frame is lifted.

[0012] In a preferred embodiment, the collision-preventing assembly comprises an upper collision-preventing pad and a lower collision-preventing pad, which are arranged in a height direction.

[0013] When the front sub-frame is lifted to the highest position, the lower collision-preventing pad is in contact with the bottom of the first mounting frame.

[0014] When the front sub-frame is lowered to the lowest position, the upper collision-preventing pad is in contact with the top of the first mounting frame.

[0015] In a preferred embodiment, the upper and lower collision-preventing pads each comprise a rubber collision-preventing pad.

[0016] In a preferred embodiment, the front lifting device comprises a front electric push rod, the front sub-frame comprises an upper mounting seat, and the second mounting frame comprises a lower mounting seat and a shock-absorbing mounting seat.

[0017] Two ends of the front electric push rod are respectively hinged to the upper mounting seat and the lower mounting seat, and one end of the front electric push rod for hinging the upper mounting seat is a lifting end. Two ends of the shock absorber are respectively hinged to the shock-absorbing mounting seat and the steering assembly, and the shock-absorbing mounting seat is arranged close to the upper mounting seat in a height direction.

[0018] In a preferred embodiment, the movable rear suspension comprises two groups of dampers, which are respectively connected to the motor driving mechanisms of two rear wheels.

[0019] The rear lifting device is provided in two groups, and the two groups of rear lifting devices correspond to the two groups of dampers.

[0020] In a preferred embodiment, the movable rear suspension comprises a lower mounting cross bar, the rear sub-frame comprises an upper mounting cross bar, and the rear lifting device comprises a rear electric push rod.

[0021] Two ends of the rear electric push rod are respectively hinged to the upper mounting cross bar and the lower mounting cross bar, and one end of the rear electric push rod for hinging the upper mounting cross bar is a lifting end.

[0022] In a preferred embodiment, the rear sub-frame covers the movable rear suspension, the rear sub-frame is provided with first support rods on both sides in a width direction, and the movable rear suspension is provided with second support rods on both sides in the width direction.

[0023] The first support rod is arranged above the second support rod, and the upper surface of the second support rod is provided with a rubber anti-collision pad; when the rear subframe is lowered to the lowest position, the rubber anti-collision pad abuts against the first support rod.

[0024] In a preferred embodiment, the rear subframe comprises a storage rack arranged between the second support rods on both sides of the width of the movable rear suspension;

[0025] The side of the second support rod towards the storage rack is provided with a nylon pad, the two sides of the width of the storage rack are provided with third support rods, and the nylon pad is in frictional cooperation with the third support rods.

[0026] The utility model also provides a small pure electric vehicle, including the lifting chassis structure, the small pure electric vehicle includes one of golf carts, sightseeing cars, shared electric cars, passenger electric cars.

[0027] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0028] 1. By setting the front lifting device and the rear lifting device at the positions of the chassis body corresponding to the movable front suspension and the movable rear suspension, the lifting function is realized through the lifting device, the flexibility of the chassis height is realized, and the passability, the controllability and the comfort of the vehicle are improved.

[0029] 2. Through the independent control of the front lifting device and the rear lifting device, the flexibility of the chassis height is realized, and the passability and the controllability of the vehicle under different road conditions are improved.

[0030] 3. The front lifting device serves as the power source of the lifting movable front suspension, two groups of front lifting devices are distributed in a splayed shape, and the movable front suspension is better stably lifted up and down and left and right.

[0031] 4. The shock absorber is arranged in parallel with the front lifting device, so that the front lifting device and the shock absorber cooperate with each other in space, the front lifting device and the shock absorber are more uniform in stress when working, and system instability caused by inconsistent force direction is avoided.

[0032] 5. The shock absorber is arranged in parallel with the front lifting device, in the process of vehicle driving, parallel arrangement can effectively reduce the influence of lateral force on the electric push rod and the shock absorber, improve the stability and reliability of the system, and after the electric push rod and the shock absorber are arranged in parallel, the two can work cooperatively in the process of vehicle driving, better absorb and buffer the impact and vibration from the road, optimize the damping effect, and improve the comfort of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a whole schematic view of the lifting chassis structure of the small pure electric vehicle in the preferred embodiment of the utility model.

[0034] Figure 2 It is the whole schematic view of chassis main body in the lifting chassis structure of the preferred embodiment of the utility model;

[0035] Figure 3 It is the assembly schematic view of front subframe, movable front suspension and front lifting device in the preferred embodiment of the utility model;

[0036] Figure 4 It is the assembly schematic view of rear subframe, movable rear suspension and rear lifting device in the preferred embodiment of the utility model;

[0037] Figure 5 It is the schematic view of front subframe lowering along height in the lifting chassis structure in the preferred embodiment of the utility model;

[0038] Figure 6 It is the schematic view of front subframe lifting along height in the lifting chassis structure in the preferred embodiment of the utility model;

[0039] Figure 7 It is the assembly schematic view of movable front suspension and steering assembly in the preferred embodiment of the utility model;

[0040] Figure 8 It is the assembly schematic view of rear subframe and movable rear suspension in the preferred embodiment of the utility model.

[0041] Mark 1, chassis main body; 11, front subframe; 111, upper anti-collision pad; 112, lower anti-collision pad; 113, upper mounting seat; 12, rear subframe; 121, upper mounting cross bar; 122, first support rod; 123, storage rack; 124, third support rod; 13, intermediate main support frame; 2, movable front suspension; 21, shock absorber; 22, first mounting frame; 23, second mounting frame; 231, lower mounting seat; 232, shock absorbing mounting seat; 24, support connecting rod; 3, movable rear suspension; 31, damper; 32, lower mounting cross bar; 33, second support rod; 34, rubber anti-collision pad; 35, rotating shaft; 36, nylon pad; 4, front lifting device; 41, front electric push rod; 5, rear lifting device; 51, rear electric push rod; 6, front wheel; 7, steering assembly; 71, steering machine; 72, up-down swing arm; 73, universal joint; 8, rear wheel; 9, motor driving mechanism; 91, direct current motor; 92, rear axle. DETAILED DESCRIPTION

[0042] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative work on the basis of the embodiments of the present application shall fall within the scope of the present application.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be wall-mounted connection, can be detachable connection, or integral connection, can be mechanical connection, can be electrical connection, can be direct connection, can be indirect connection through an intermediate medium, can be internal communication of two elements, and for a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Reference Figures 1-6 The embodiment provides a lifting chassis structure of a small pure electric vehicle, which is suitable for various small pure electric vehicles, including one of a golf cart, a sightseeing vehicle, a shared electric trolley and a passenger trolley, has wide applicability and market prospect, and can significantly improve the performance and user experience of the vehicle.

[0046] The small pure electric vehicle is a four-wheel electric vehicle driven by independent hub motors, such as Figure 1 The lifting chassis structure thereof comprises a chassis body 1, a movable front suspension 2, a movable rear suspension 3, a front lifting device 4 and a rear lifting device 5; and Figure 2, the chassis body 1 includes front subframe 11 and rear subframe 12, the front lifting device 4 is connected to the movable front suspension 2, the rear lifting device 5 is connected to the movable rear suspension 3, the rear subframe 12; the front subframe 11 or / and rear subframe 12 is driven by the front lifting device 4 or / and the rear lifting device 5 to be lifted up and down relative to the movable front suspension 2 or / and the movable rear suspension 3, so that the chassis body 1 is lifted up or lowered down along the height; through independent control of the front lifting device 4 and the rear lifting device 5, flexible adjustment of the chassis height is realized, and the passability and maneuverability of the vehicle under different road conditions are improved.

[0047] As Figure 1 , the chassis body 1 further comprises a middle main support frame 13 connecting the front subframe 11 and the rear subframe 12, and the movable front suspension 2 is hinged to the middle main support frame 13 through four support connecting rods 24. During vehicle driving, the support connecting rod 24 serves as an up-down stabilizer to ensure normal driving of the vehicle. The movable rear suspension 3 is rotationally connected to the middle main support frame 13 through two rotating shafts 35. Figure 3 , the movable front suspension 2 includes two groups of shock absorbers 21, and the two groups of shock absorbers 21 are connected to the steering assemblies 7 of the two front wheels 6; the front lifting device 4 is provided with two groups, and the two groups of front lifting devices 4 correspond to the two groups of shock absorbers 21. The adjacent front lifting devices 4 and the shock absorbers 21 are parallel to each other, and the shock absorbers 21 and the front lifting devices 4 are arranged in parallel, so that the front lifting devices 4 and the shock absorbers 21 are more uniform in stress during work, the damping effect is optimized, and the comfort of the vehicle is improved.

[0048] As Figure 7 , the movable front suspension 2 is connected to the two front wheels 6 through the steering assembly 7, and the movable front suspension 2 contains the steering assembly 7, which includes a steering machine 71, an up-down swing arm 72 and a universal joint 73. The universal joint 73 is used to connect with the steering wheel assembly, the steering machine 71 is used to control the steering of the two front wheels 6, and the shock absorber 21 is connected with the upper swing arm in the up-down swing arm 72. During vehicle driving, the universal joint 73 is raised or lowered with the vehicle, the shock absorber 21 is lifted synchronously with the steering machine 71 and the up-down swing arm 72, the performance of normal driving is maintained during lifting, and there is no tire change. Avoiding the defects of traditional lifting chassis such as tire wear and instability during the journey.

[0049] As Figure 3, the front subframe 11 includes a space for placing the movable front suspension 2, the movable front suspension 2 includes a first mounting bracket 22 for connecting the steering assembly 7 and a second mounting bracket 23 for connecting the front lifting device 4; the front subframe 11 further includes a collision prevention assembly, which cooperates with the first mounting bracket 22 when the front subframe 11 is lifted, the cooperation of the collision prevention assembly and the first mounting bracket 22 effectively protects the front subframe 11 from collision damage during lifting, improves the safety and durability of the vehicle.

[0050] As Figure 5 , the collision prevention assembly includes an upper collision pad 111 and a lower collision pad 112, which are arranged in a height direction; when the front subframe 11 is lifted to the highest position, the lower collision pad 112 abuts against the bottom of the first mounting bracket 22 (as Figure 6 ); when the front subframe 11 is lowered to the lowest position, the upper collision pad 111 abuts against the top of the first mounting bracket 22 (as Figure 5 ). Through the arrangement of the upper collision pad 111 and the lower collision pad 112, the position limiting and buffering of the front subframe 11 during lifting are ensured, further improving the stability and safety of the vehicle.

[0051] Specifically, the upper collision pad 111 and the lower collision pad 112 each include a rubber collision pad, which has good elasticity and wear resistance, can effectively absorb collision energy, protect vehicle parts, and prolong service life.

[0052] As Figure 3 , the assembly structure of the front lifting device 4 is that the front lifting device 4 includes a front electric push rod 41, the front subframe 11 includes an upper mounting seat 113, the second mounting bracket 23 includes a lower mounting seat 231 and a shock absorbing mounting seat 232; the two ends of the front electric push rod 41 are respectively hinged to the upper mounting seat 113 and the lower mounting seat 231; the two ends of the shock absorber 21 are respectively hinged to the shock absorbing mounting seat 232 and the steering assembly 7. The end of the front electric push rod 41 for hinging the upper mounting seat 113 is a lifting end, the shock absorbing mounting seat 232 is arranged close to the upper mounting seat 113 in a height direction, the shock absorbing mounting seat 232 is arranged close to the upper mounting seat 113, which optimizes the installation position of the shock absorber 21, the front electric push rod 41 and the shock absorber 21 can work cooperatively during vehicle driving, improving the shock absorbing effect and reducing vibration and impact during vehicle driving.

[0053] As Figure 4The active rear suspension 3 comprises two groups of dampers 31 connected to the motor driving mechanisms 9 of the two rear wheels 8 respectively; the rear lifting device 5 is provided with two groups, and the two groups of rear lifting devices 5 correspond to the two groups of dampers 31. The combination of the dampers 31 and the motor driving mechanisms 9 realizes independent control of the rear suspension, improves the controllability and stability of the vehicle, and optimizes the driving performance of the rear wheels 8.

[0054] As Figure 8 The motor driving mechanism 9 adopts a direct current motor 91 as the power source of the whole vehicle, and forms a power source through motor driving of the rear axle 92. The rear axle 92 converts the power source of the whole vehicle, and drives the rear wheels 8 through the cooperation of the direct current motor 91 and the rear axle 92. The active front suspension 2 is connected with the front wheels 6, and the front wheels 6 are passive wheels. The motor driving mechanism 9 is a prior art and is widely used in small pure electric vehicles such as golf carts, sightseeing vehicles, shared battery cars, and passenger battery cars.

[0055] As Figure 4 The assembly structure of the rear lifting device 5 is that the active rear suspension 3 comprises a lower mounting cross bar 32, the rear subframe 12 comprises an upper mounting cross bar 121, and the rear lifting device 5 comprises a rear electric push rod 51. The two ends of the rear electric push rod 51 are respectively hinged to the upper mounting cross bar 121 and the lower mounting cross bar 32, and the rear electric push rod 51 is used for hinging one end of the upper mounting cross bar 121 as a lifting end. The rear electric push rod 51 is the power source of the lifting function of the active rear suspension 3, and through the setting of the rear electric push rod 51, the lifting function of the rear subframe 12 is realized, and the rear electric push rod 51 cooperates with the front lifting device 4 to further optimize the passability and controllability of the vehicle.

[0056] As Figures 5-6 The rear subframe 12 covers the active rear suspension 3, the rear subframe 12 is provided with a first support rod 122 on both sides along the width, and the active rear suspension 3 is provided with a second support rod 33 on both sides along the width; the first support rod 122 is arranged above the second support rod 33, and the upper surface of the second support rod 33 is provided with a rubber anti-collision pad 34; when the rear subframe 12 is lowered to the bottommost position, the rubber anti-collision pad 34 abuts against the first support rod 122. The setting of the rubber anti-collision pad 34 effectively buffers the collision between the rear subframe 12 and the active rear suspension 3, protects the vehicle parts, and improves the safety and durability of the vehicle.

[0057] As Figure 8The rear subframe 12 comprises a storage rack 123 for mounting a storage basket to facilitate the placement of articles. The storage rack 123 is disposed between the second support rods 33 on both sides of the width of the movable rear suspension 3, and a nylon pad 36 is arranged on the side of the second support rod 33 facing the storage rack 123. The storage rack 123 is provided with a third support rod 124 on both sides of the width, and the nylon pad 36 is in frictional engagement with the third support rod 124. By virtue of the wear-resistant lifting of the nylon pad 36, the left-right stability of the rear subframe 12 during lifting is ensured.

[0058] In the embodiment, the lifting chassis structure of the small pure electric vehicle realizes flexible adjustment of the chassis height through independent control of the front and rear lifting devices 5. The front and rear subframes 11 and 12 are respectively driven by the front and rear lifting devices 5 to realize the up-down lifting function. The movable front and rear suspensions 2 and 3 are respectively provided with shock absorbers 21 and dampers 31 to optimize the shock absorption and handling performance of the vehicle. The arrangement of the anti-collision assembly and the rubber anti-collision pad 34 further improves the safety and durability of the vehicle. The structure is suitable for various small pure electric vehicles and has significant market application value.

[0059] The above is only a preferred specific embodiment of the present application, but the design concept of the present application is not limited thereto. Any skilled person in the art can make non-essential changes to the present application within the technical scope disclosed by the present application, and such changes shall not be deemed to be within the scope of the present application.

Claims

1. A lifting chassis structure for a small pure electric vehicle, characterized in that: Includes the main chassis, movable front suspension, movable rear suspension, front lifting device, and rear lifting device; The chassis body includes a front subframe and a rear subframe. The front lifting device is connected to the movable front suspension and the front subframe, and the rear lifting device is connected to the movable rear suspension and the rear subframe. The front subframe and / or rear subframe can be raised and lowered relative to the movable front suspension and / or the movable rear suspension by the drive of the front lifting device and / or the rear lifting device, so that the chassis body can be raised or lowered along the height. The movable front suspension includes two sets of shock absorbers and a steering assembly, with the two sets of shock absorbers respectively connected to the steering assembly; the front lifting device is provided in two sets, which are arranged in a figure-eight pattern. The two sets of front lifting devices correspond to the two sets of shock absorbers, and the adjacent front lifting devices and shock absorbers are parallel to each other.

2. The lifting chassis structure for a small pure electric vehicle according to claim 1, characterized in that: The front subframe includes a space for housing the movable front suspension, the movable front suspension including a first mounting bracket for connecting the steering assembly and a second mounting bracket for connecting the front lifting device, the first mounting bracket being connected to the second mounting bracket; The front subframe also includes a collision avoidance component, which cooperates with the first mounting bracket when the front subframe is raised or lowered.

3. The lifting chassis structure for a small pure electric vehicle according to claim 2, characterized in that: The anti-collision assembly includes an upper anti-collision pad and a lower anti-collision pad, which are spaced apart along the height direction; When the front subframe is raised to its highest position, the lower anti-collision pad abuts against the bottom of the first mounting bracket; When the front subframe is lowered to its lowest position, the upper anti-collision pad comes into contact with the top of the first mounting bracket.

4. The lifting chassis structure for a small pure electric vehicle according to claim 3, characterized in that: Both the upper and lower anti-collision pads include rubber anti-collision pads.

5. The lifting chassis structure for a small pure electric vehicle according to claim 2, characterized in that: The front lifting device includes a front electric push rod, the front subframe includes an upper mounting base, and the second mounting frame includes a lower mounting base and a shock-absorbing mounting base; The two ends of the front electric push rod are respectively hinged to the upper mounting base and the lower mounting base, and the end of the front electric push rod used to hinge to the upper mounting base is the lifting end; the two ends of the shock absorber are respectively hinged to the shock absorber mounting base and the steering assembly, and the shock absorber mounting base is set close to the upper mounting base along the height direction.

6. The lifting chassis structure for a small pure electric vehicle according to claim 1, characterized in that: The movable rear suspension includes two sets of dampers, which are respectively connected to the motor drive mechanism of the two rear wheels; The rear lifting device is provided in two sets, and the two sets of rear lifting devices correspond to the two sets of dampers.

7. The lifting chassis structure for a small pure electric vehicle according to claim 6, characterized in that: The movable rear suspension includes a lower mounting crossbar, the rear subframe includes an upper mounting crossbar, and the rear lifting device includes a rear electric push rod; The two ends of the rear electric push rod are respectively hinged to the upper mounting crossbar and the lower mounting crossbar, and the end of the rear electric push rod used to hinge to the upper mounting crossbar is the lifting end.

8. The lifting chassis structure for a small pure electric vehicle according to claim 1, characterized in that: The rear subframe is mounted above the movable rear suspension. The rear subframe is provided with first support rods on both sides of its width, and the movable rear suspension is provided with second support rods on both sides of its width. The first support rod is positioned above the second support rod, and the upper surface of the second support rod is provided with a rubber anti-collision pad; when the rear subframe is lowered to its lowest position, the rubber anti-collision pad comes into contact with the first support rod.

9. The lifting chassis structure for a small pure electric vehicle according to claim 8, characterized in that: The rear subframe includes a storage rack, which is positioned between the second support rods on both sides of the width of the movable rear suspension; The second support rod has a nylon pad on the side facing the shelf, and the shelf has a third support rod on both sides along its width, with the nylon pad and the third support rod in frictional engagement.

10. A small pure electric vehicle, characterized in that: The vehicle includes the lifting chassis structure as described in any one of claims 1-9; the small pure electric vehicle includes one of golf carts, sightseeing vehicles, shared electric vehicles, and passenger electric vehicles.

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