CN111890861A

CN111890861A - Suspension system of electric kart

Info

Publication number: CN111890861A
Application number: CN202010915441.XA
Authority: CN
Inventors: 王磊
Original assignee: Blue Research Beijing Technology Co ltd
Current assignee: Blue Research Beijing Technology Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2020-11-06

Abstract

The invention provides a suspension system of an electric kart, which solves the technical problems of no suspension system and poor driving comfort of the kart on the premise of ensuring driving controllability. The suspension system of the electric kart comprises a pair of front suspension components and a pair of rear suspension components which are symmetrically arranged at two sides of a frame; the two front wheels are respectively connected with the frame through the two front suspension assemblies, and the two rear wheels are respectively connected with the frame through the two rear suspension assemblies; the front suspension component and the rear suspension component are both of double-cross arm type suspension structures with different lengths; the shock absorption assembly is arranged between the front suspension assembly and the frame and between the rear suspension assembly and the frame. The invention improves the comfort of driving; the light weight design is adopted, the weight is light, the size is small, the competition and the entertainment can be better met, and the device can also be used for juvenile automobile education; ground clearance can adjust according to the road surface condition, when guaranteeing that electronic kart controls the enjoyment, can satisfy more place demands.

Description

Suspension system of electric kart

Technical Field

The invention relates to the technical field of racing cars, in particular to a suspension system of an electric kart.

Background

With the development of science and technology and the improvement of living standard of people, people have more and more leisure and entertainment activities, and the racing sports are pursued by young fans more and more. The electric kart comprises a frame and connecting lugs arranged on the frame, and all system assemblies forming the racing car are installed on the frame through the connecting lugs.

The applicant has found that the prior art has at least the following technical problems:

all systems of the entertainment type carting car on the market are directly installed on the car frame through the connecting lug plates, hard connection is adopted, a suspension system is not arranged, and a driver cannot obtain better comfort in the driving process.

Disclosure of Invention

The invention aims to provide a suspension system of an electric kart, and aims to solve the technical problems that the kart in the prior art has no suspension system and is poor in driving comfort.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a suspension system of an electric kart, which comprises a pair of front suspension components and a pair of rear suspension components, wherein the front suspension components and the rear suspension components are symmetrically arranged on two sides of a frame; the two front wheels are respectively connected with the frame through the two front suspension assemblies, and the two rear wheels are respectively connected with the frame through the two rear suspension assemblies; the front suspension assembly and the rear suspension assembly are both of unequal-length double-cross-arm type suspension structures; the shock absorption assembly is arranged between the front suspension assembly and the frame and between the rear suspension assembly and the frame.

On the basis of the technical scheme, the invention can be further improved as follows.

As a further improvement of the invention, the front suspension assembly comprises a front suspension upper cross arm, a front suspension lower cross arm and a front wheel edge, the front suspension upper cross arm and the front suspension lower cross arm are arranged side by side up and down and are connected with the front wheel edge, and the front wheel edge is respectively connected with a steering engine and a front wheel of the electric kart.

As a further improvement of the invention, the upper cross arm of the front suspension comprises an upper cross arm main body of the front suspension, which is approximately in an isosceles triangle structure, a first bushing arranged at two ends of one side of the upper cross arm main body of the front suspension, a first threaded hole arranged at one vertex of the upper cross arm main body of the front suspension, a first rod end joint bearing screwed on the first threaded hole, a first rod end lock nut screwed on the first rod end joint bearing, and first tapered gaskets arranged at the upper side and the lower side of the first rod end joint bearing; a bolt penetrates through the first conical gasket and the first rod end joint bearing and then is connected with the upper part of the front wheel edge; and the bolt penetrates through the first bushing and the upper cross arm main body of the front suspension and then is connected with the frame.

As a further improvement of the invention, the front suspension lower cross arm comprises a front suspension lower cross arm main body in an approximate isosceles triangle structure, second bushings arranged at two ends of one side of the front suspension lower cross arm main body, a second threaded hole arranged at one vertex of the front suspension lower cross arm main body, a second rod end joint bearing screwed on the second threaded hole, a second rod end lock nut screwed on the second rod end joint bearing, and second tapered gaskets arranged on the upper side and the lower side of the second rod end joint bearing; a bolt penetrates through the second conical gasket and the second rod end joint bearing and then is connected with the lower part of the front wheel edge; a bolt penetrates through the second bushing and the upper cross arm main body of the front suspension and then is connected with the frame; and one end of the shock absorption assembly is connected to the lower cross arm main body of the front suspension, and the other end of the shock absorption assembly is connected to the frame.

As a further improvement of the invention, the front wheel edge comprises a front steering knuckle, a front wheel hub, a front bearing, a front steel sleeve and a front locknut, and the front steering knuckle comprises a first connecting part and a second connecting part; the first connecting part is rod-shaped, and the tail end of the first connecting part is provided with an external thread section; the second connecting part is arranged perpendicular to the first connecting part, is of an approximate U-shaped structure, and is connected with the upper cross arm of the front suspension and the lower cross arm of the front suspension at two free ends respectively; the middle part of the second connecting part is oppositely provided with a first connector and a second connector, the first connector is connected with a steering gear of the electric kart, and the second connector can be used for being connected with a brake caliper; the number of the front bearings is two, the two front bearings are respectively arranged at two ends of the front hub in an interference fit manner, and the first connecting part sequentially penetrates through the front bearings, the front hub, the front bearings and the front steel sleeve and then is connected with the front locking nut; the first connecting part is connected with the two front bearings in an interference fit manner; one end of the front wheel hub is provided with a third connector which can be connected with a brake disc of the electric kart; the other end is provided with a fourth connector which is connected with the rim of the front wheel.

As a further improvement of the invention, the rear suspension assembly comprises a rear suspension upper cross arm, a rear suspension lower cross arm and a rear wheel edge, the rear suspension upper cross arm and the rear suspension lower cross arm are arranged side by side up and down and are connected with the rear wheel edge, and the rear wheel edge is respectively connected with a speed reduction motor and a rear wheel of the electric kart.

As a further improvement of the present invention, the rear suspension upper cross arm comprises a rear suspension upper cross arm main body, a third bushing and a third connecting portion, wherein the rear suspension upper cross arm main body comprises a U-shaped first main body and a rod-shaped second main body which is arranged at an opening of the first main body and is connected with both free ends of the first main body; the third connecting part is arranged in parallel with the second main body and fixed at the U-shaped vertex of the first main body, and the third bushings are arranged at two ends of the first main body and two ends of the third connecting part; and the bolt penetrates through the third bushing and the second main body and then is connected with the frame, and the bolt penetrates through the third bushing and the third connecting part and then is connected with the upper part of the rear wheel edge.

As a further improvement of the present invention, the rear suspension lower cross arm includes a rear suspension lower cross arm main body, a fourth bush, and a fourth connecting portion, the rear suspension lower cross arm main body includes a U-shaped third body and a rod-shaped fourth body provided at the third body opening and connected to both free ends of the third body; the fourth connecting part and the fourth main body are arranged in parallel and fixed at the U-shaped vertex of the third main body, and the fourth bushings are arranged at two ends of the third main body and two ends of the fourth connecting part; a bolt penetrates through the fourth bushing and the fourth main body and then is connected with the frame, and the bolt penetrates through the fourth bushing and the fourth connecting part and then is connected with the lower part of the rear wheel edge; one end of the shock absorption assembly is connected with the lower cross arm main body of the rear suspension, and the other end of the shock absorption assembly is connected with the frame.

As a further improvement of the invention, the rear wheel edge comprises a rear steering knuckle, a rear wheel hub, a rear bearing and a rear snap spring, the number of the rear bearings is two, the two rear bearings are respectively arranged on two sides of the rear steering knuckle in an interference fit manner, a brake caliper of the electric kart is fixed on the rear steering knuckle through a bolt, and a fixed shaft at one end of the rear wheel hub sequentially penetrates through a brake disc and is connected with the rear bearing in an interference fit manner; one end of the rear wheel hub, which is positioned at the inner side of the fixed shaft, is provided with a fifth connector for connecting with a brake disc of the electric kart, and the other end of the rear wheel hub is provided with a sixth connector for connecting with a rim of a rear wheel; and the top and the bottom of the rear steering knuckle are respectively provided with a seventh connector and an eighth connector which are respectively connected with the upper cross arm of the rear suspension and the lower cross arm of the rear suspension.

As a further improvement of the present invention, the front suspension upper cross arm and the front suspension lower cross arm in the front suspension assembly and the rear suspension upper cross arm and the rear suspension lower cross arm in the rear suspension assembly are all made of steel pipes.

Compared with the prior art, the invention has the following beneficial effects:

the suspension system provided by the invention is applied to the electric kart, and not only improves the comfort of a driver in driving on the basis of ensuring the controllability of the electric kart by changing a direct rigid connection structure of a frame and wheels in the prior art into a flexible connection structure connected through the suspension system; the front and rear cantilever assemblies of the suspension system are in a double-cross-arm suspension structure with different lengths, so that the electric kart has good controllability; the conical gasket is used at the position where the rod end joint bearing is connected, so that the conical gasket is used for fastening connection and ensuring that a suspension cross arm does not generate motion interference on a wheel side system; the suspension cross arms are welded by adopting steel tube structures, and finite element analysis is carried out on a wheel side system, so that the light weight design of the suspension system of the electric kart is realized, the weight is light, and the size is small; the rear suspension assembly is compact and reasonable in layout, can realize double-wheel driving, and the electric kart has good power performance; the suspension system has the characteristics of small volume and light weight, can better meet the requirements of competition and entertainment, and can also be used for juvenile automobile education; the damping component has a damping effect, the ground clearance of the racing car can be adjusted by adjusting the length of the damping component, a higher ground clearance design can be realized, and more field requirements can be met while the control pleasure of the electric kart is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the suspension system of the present invention;

FIG. 2 is a top plan view of the suspension system of the present invention;

FIG. 3 is a side view of the suspension system of the present invention;

FIG. 4 is a schematic perspective view of the suspension system of the present invention;

FIG. 5 is a schematic perspective view of a cross arm on a front suspension of the front suspension assembly of the suspension system of the present invention;

FIG. 6 is a schematic perspective view of a lower cross arm of a front suspension of the suspension system of the present invention;

FIG. 7 is a schematic perspective view of a cross arm on a rear suspension of the front suspension assembly of the suspension system of the present invention;

FIG. 8 is a schematic perspective view of a lower cross arm of a rear suspension of the front suspension assembly of the suspension system of the present invention;

FIG. 9 is an exploded view of the front wheel rim of the front suspension assembly of the suspension system of the present invention;

FIG. 10 is an exploded view of the rear wheel rim of the front suspension assembly of the suspension system of the present invention;

FIG. 11 is a schematic perspective view of a front suspension assembly of the suspension system of the present invention mounted to a vehicle frame;

FIG. 12 is a schematic perspective view of a rear suspension assembly of the suspension system of the present invention mounted to a vehicle frame;

fig. 13 is a perspective view of a suspension assembly of the suspension system of the present invention in connection with a vehicle frame.

Fig. 1, front suspension assembly; 11. a front suspension upper cross arm; 111. a front suspension upper cross arm main body; 112. a first bushing; 113. a first threaded hole; 114. a first rod end knuckle bearing; 115. a first rod end locking nut; 116. a first tapered shim; 12. a front suspension lower cross arm; 121. a front suspension lower cross arm main body; 122. a second bushing; 123. a second threaded hole; 124. a second rod end knuckle bearing; 125. a second rod end locking nut; 126. a second tapered gasket; 13. a front wheel edge; 131. a front knuckle; 1311. a first connection portion; 1312. a second connecting portion; 1313. a first connector; 1314. a second connector; 132. a front hub; 1321. a third connector; 1322. a fourth connector; 133. a front bearing; 134. a front steel sleeve; 135. a front lock nut; 2. a rear suspension assembly; 21. a rear suspension upper cross arm; 211. a rear suspension upper cross arm main body; 212. a third bushing; 213. a third connecting portion; 22. a rear suspension lower cross arm; 221. a rear suspension lower cross arm main body; 222. a fourth bushing; 223. a fourth connecting portion; 23. a rear wheel edge; 231. a rear knuckle; 232. a rear hub; 233. a rear bearing; 234. a back clamp spring; 3. a shock absorbing assembly; 100. a frame; 200. a front wheel; 300. a rear wheel; 400. a brake caliper; 500. a brake disc; 600. a rim; 700. a motor; 800. and a speed reducer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

As shown in fig. 1, 2, 3, 4, 11, 12 and 13, the present invention provides a suspension system of an electric kart, including a pair of front suspension assemblies 1 and a pair of rear suspension assemblies 2 symmetrically installed at both sides of a frame 100; the two front wheels 200 are respectively connected with the frame 100 through the two front suspension assemblies 1, and the two rear wheels 300 are respectively connected with the frame 100 through the two rear suspension assemblies 2; the front suspension component 1 and the rear suspension component 2 are both of double-cross arm type suspension structures with different lengths; and a shock absorbing assembly 3 disposed between the front suspension assembly 1 and the vehicle frame 100 and between the rear suspension assembly 2 and the vehicle frame 100.

It should be noted that, in the present invention, the damping component 3 is made of a damper; the front suspension assembly 1, the front wheel 200 and the frame 100 are connected in a movable connection relationship, the rear suspension assembly 2, the rear wheel 300 and the frame 100 are connected in a movable connection relationship, the movable connection relationship comprises mutual rotation, mutual movement and the like, and specifically which movable connection relationship is selected needs to consider the requirement of mutual movement between two connected components.

As shown in fig. 1, 2, 4 and 5, the front suspension assembly 1 includes a front suspension upper arm 11, a front suspension lower arm 12 and front wheel rims 13, the front suspension upper arm 11 and the front suspension lower arm 12 are disposed side by side up and down and are connected to the front wheel rims 13, and the front wheel rims 13 are connected to a steering gear and front wheels 200 of the electric kart.

The front wheel edge 13 is pulled by the steering engine to rotate relative to the front suspension upper cross arm 11 and the front suspension lower cross arm 12, the front wheel edge 13 rotates to drive the front wheel 200 to rotate, and therefore the front wheel steering action of the electric kart is achieved. The front suspension upper arm 11, the front suspension lower arm 12 and the vehicle frame 100 are connected to each other so as to be rotatable in the vertical direction, and the front suspension upper arm 11, the front suspension lower arm 12 and the front wheel rim 13 are connected to each other so as to be movable in the vertical direction and rotatable in the horizontal direction.

The front suspension upper cross arm 11 and the front suspension lower cross arm 12 in the front suspension assembly 1 and the rear suspension upper cross arm 21 and the rear suspension lower cross arm 22 in the rear suspension assembly 2 are all made of steel pipes through welding.

As shown in fig. 5, the front suspension upper cross arm 11 includes a front suspension upper cross arm main body 111 having an approximately isosceles triangle structure, first bushings 112 disposed at both ends of one side of the front suspension upper cross arm main body 111, a first threaded hole 113 disposed at one vertex of the front suspension upper cross arm main body 111, a first rod end joint bearing 114 screwed into the first threaded hole 113, a first rod end lock nut 115 screwed into the first rod end joint bearing 114, and first tapered washers 116 mounted on both upper and lower sides of the first rod end joint bearing 114; the bolt penetrates through the first conical gasket 116 and the first rod end knuckle bearing 114 and then is connected with the upper part of the front wheel edge 13; the bolt passes through the first bushing 112 and the front suspension upper cross arm main body 111 and is connected to the frame 100.

As shown in fig. 6, the front suspension lower cross arm 12 includes a front suspension lower cross arm main body 121 having an approximately isosceles triangle structure, a second bushing 122 disposed at both ends of one side of the front suspension lower cross arm main body 121, a second screw hole 123 disposed at one vertex of the front suspension lower cross arm main body 121, a second rod end joint bearing 124 screwed to the second screw hole 123, a second rod end lock nut 125 screwed to the second rod end joint bearing 124, and second tapered washers 126 mounted on both upper and lower sides of the second rod end joint bearing 124; the bolt penetrates through the second conical gasket 126 and the second rod end joint bearing 124 and is connected with the lower part of the front wheel edge 13; the bolt passes through the second bushing 122 and the upper cross arm main body 111 of the front suspension and then is connected with the frame 100; the damper assembly 3 has one end connected to the front suspension lower cross arm body 121 and the other end connected to the vehicle frame 100. Specifically, a shock absorber connection tab is provided at one end of one side of the front suspension lower cross arm main body 121, that is, at a position close to one of the second bushings 122, and the shock absorber is mounted on the front suspension lower cross arm main body 121 through the connection tab, which is a hollow structure in order to reduce the weight.

One end of the front suspension upper cross arm 11 is aligned with a suspension fixing lug mounting hole of the frame 100, and is mechanically connected by bolts and nuts, and the other end fixes the first rod end joint bearing 114 and a mounting point on the front wheel edge 13 by bolts. One end of the front suspension lower cross arm 12 is aligned with a suspension fixing lifting lug mounting hole of the frame 100, and is mechanically connected by bolts and nuts, and the other end fixes the second rod end joint bearing 124 and a front wheel edge 13 lower mounting point by bolts. The parameters of the traveling system of the front suspension assembly 1 can be finely adjusted by adjusting the rod end joint bearing.

As shown in fig. 9, the front wheel rim 13 includes a front knuckle 131, a front hub 132, a front bearing 133, a front steel sleeve 134, and a front locknut 135, and the front knuckle 131 includes a first connecting portion 1311 and a second connecting portion 1312; the first connecting part 1311 is rod-shaped, and the tail end of the first connecting part is provided with an external thread section; the second connecting portion 1312 is arranged perpendicular to the first connecting portion 1311, the second connecting portion 1312 is of an approximately U-shaped structure and is machined, two free ends of the second connecting portion 1312 are respectively connected with the front suspension upper cross arm 11 and the front suspension lower cross arm 12, specifically, the second connecting portion 1312 is arranged vertically, the upper free end and the lower free end are both horizontal, the free ends are provided with light holes, the first rod end knuckle bearing 114 in the front suspension upper cross arm 11 is connected with the light holes through bolts, the second rod end knuckle bearing 124 in the front suspension lower cross arm 12 is connected with the light holes through bolts, and when a wheel moves, the front wheel edge 13 is interfered with the front suspension upper cross arm 11 and the front suspension lower cross arm 12, so that tapered gaskets are respectively arranged on the upper portion and the lower portion of the knuckle bearings; the middle part of the second connecting part 1312 is oppositely provided with a first connecting head 1313 and a second connecting head 1314, the first connecting head 1313 and the second connecting head 1314 are both of sheet structures, connecting through holes are formed in the tail ends of the first connecting head 1313 and the steering gear of the electric kart, the number of the second connecting heads 1314 is two, the two second connecting heads are arranged side by side up and down and can be used for being connected with the brake caliper 400; the number of the front bearings 133 is two, the two front bearings are respectively arranged at two ends of the front hub 132 in an interference fit manner, and the first connecting part 1311 sequentially penetrates through the front bearings 133, the front hub 132, the front bearings 133 and the front steel sleeve 134 and then is connected with the front locking nut 135; the first connecting part 1311 is connected with the two front bearings 133 in an interference fit manner; one end of the front wheel hub 132 is provided with a third connector 1321 which can be connected with a brake disc 500 of the electric kart; the other end is provided with a fourth connector 1322 to which the rim 600 of the front wheel 200 is connected. The brake disc 500 and the brake caliper 400 may be installed when the electric kart brakes for the front wheels, and may not be installed if the electric kart brakes for the rear wheels. The front steering knuckle 131 is assembled with the front hub 132 through the front bearing 133 in an interference fit mode, and the front bearing 133 is arranged on two sides of the front hub 132 to guarantee that the wheel can normally run. The front steel sleeve 134 and the front lock nut 135 are arranged on the outer side of the front hub 132, so that the front steering knuckle 131 can be locked, and the front wheel edge 13 system cannot be separated when the vehicle moves.

As shown in fig. 4 and 7, the rear suspension assembly 2 includes a rear suspension upper crossbar 21, a rear suspension lower crossbar 22, and a rear wheel rim 23, the rear suspension upper crossbar 21 and the rear suspension lower crossbar 22 are arranged side by side up and down and are connected to the rear wheel rim 23, and the rear wheel rim 23 is connected to a reduction motor and a rear wheel 300 of the electric kart. The reduction motor includes a motor 700 and a reducer 800 to power the rear wheels. Since the rear suspension assemblies 2 are provided in pairs and located at two sides of the frame 100, two sets of reduction motors are provided for starting the rear wheels 300, and are used for driving the two rear wheels 300 respectively to form a two-wheel drive.

The motor 700 is fixed to the rear retarder 800 by bolts, and the motor 700 and the retarder 800 are coupled in the form of a key groove. The other end of the speed reducer 800 is fixed to the rear wheel rim 23, and the speed reducer 800 and the rear wheel rim 23 are mechanically connected by bolts and nuts, or the speed reducer 800 and the rear wheel rim 23 are connected by a key way. The rear wheel serves as a driving wheel of the electric kart, and the motor 700 transmits power to the speed reducer 800, transmits power to the rear wheel rim 23 through the speed reducer 800, and finally transmits power to the wheel. And finally, the rear driving system can realize double-wheel driving.

As shown in fig. 7, the rear suspension upper cross arm 21 includes a rear suspension upper cross arm main body 211, a third bushing 212, and a third connecting portion 213, and the rear suspension upper cross arm main body 211 includes a U-shaped first main body and a rod-shaped second main body provided at the first main body opening to be connected to both free ends of the first main body; the third connecting portion 213 is arranged in parallel with the second main body and fixed at the U-shaped vertex of the first main body, it should be noted that the third connecting portion 213 is a short section made of steel pipe, and the third bushings 212 are arranged at two ends of the first main body and two ends of the third connecting portion 213; the bolt is connected to the frame 100 after passing through the third bushing 212 and the second body, and the bolt is connected to the upper portion of the rear wheel rim 23 after passing through the third bushing 212 and the third connecting portion 213.

The rear suspension upper arm 21, the rear suspension lower arm 22 and the frame 100 are connected to each other so as to be rotatable in the vertical direction, and the rear suspension upper arm 21, the rear suspension lower arm 22 and the rear wheel rim 23 are connected to each other so as to be movable in the vertical direction and rotatable in the horizontal direction.

As shown in fig. 8, the rear suspension lower cross arm 22 includes a rear suspension lower cross arm main body 221, a fourth bushing 222, and a fourth connecting portion 223, and the rear suspension lower cross arm main body 221 includes a U-shaped third main body and a rod-shaped fourth main body provided at an opening of the third main body to be connected to both free ends of the third main body; the fourth connecting part 223 is arranged in parallel with the fourth main body and fixed at the U-shaped vertex of the third main body, the fourth connecting part 223 is a short section made of a steel pipe, and the fourth bushing 222 is arranged at two ends of the third main body and two ends of the fourth connecting part 223; the bolt passes through the fourth bush 222 and the fourth body and then is connected with the frame 100, and the bolt passes through the fourth bush 222 and the fourth connecting part 223 and then is connected with the lower part of the rear wheel edge 23; the shock-absorbing unit 3 has one end connected to the rear suspension lower arm main body 221 and the other end connected to the vehicle frame 100. It should be noted that, for convenience of installation, a connection lug is arranged at one end of the fourth main body of the rear suspension lower cross arm main body 221, and the connection lug is designed in a hollow structure, so that the weight can be reduced.

As shown in fig. 10, the rear wheel rim 23 includes a rear knuckle 231, a rear hub 232, a rear bearing 233 and a rear snap spring 234, the number of the rear bearings 233 is two, and the two rear bearings 233 are respectively installed on two sides of the rear knuckle 231 in an interference fit manner, the brake caliper 400 of the electric kart is fixed on the rear knuckle 231 through bolts, and a fixed shaft at one end of the rear hub 232 sequentially penetrates through the brake disc 500, the rear bearing 233, the rear knuckle 231, and the fixed shaft of the rear hub 232 and the rear bearing 233 to be connected in an interference fit manner; one end of the rear wheel hub 232, which is positioned at the inner side of the fixed shaft, is provided with a fifth connector for connecting with a brake disc 500 of the electric kart, and the other end of the rear wheel hub 232 is provided with a sixth connector for connecting with a rim 600 of a rear wheel 300; the top and bottom of the rear knuckle 231 are respectively provided with a seventh connector and an eighth connector, which are respectively connected with the rear suspension upper cross arm 21 and the rear suspension lower cross arm 22. In order to reduce the weight, the seventh connector and the eighth connector are also designed to be hollow structures respectively.

Wherein the rear wheel belongs to a driving wheel of the vehicle, the brake caliper 400 is fixed to the rear knuckle 231 by bolts, and the brake disc 500 is fixed to the rear hub 232 by bolts. The rear wheel hub 232 is provided with a clamp spring groove, the rear wheel hub 232 and the rear steering knuckle 231 are matched together through an inner rear bearing 233 and an outer rear bearing 233, and a rear clamp spring 234 is installed to ensure that the wheel does not fall out of the rear bearing 233 during movement. The rear knuckle 231 is subjected to finite element analysis during design, and is subjected to hollow-out treatment and lightweight wheel edge design.

When the suspension is installed, tapered gaskets are arranged on the upper cross arm 11 of the front suspension, the lower cross arm 12 of the front suspension and the rod end knuckle bearing, so that the suspension does not interfere with the front wheel edge 13 when jumping up and down.

The front wheel 200 and the rear wheel 300 both comprise a rim 600 and tires, the tires are mounted on the rim 600, and the rim 600 is fixed on the front wheel edge 13 and the rear wheel edge 23 through nuts, so that four wheels of the whole vehicle are formed.

In the invention, all the bushings and the steel pipes at the corresponding mounting positions are in interference fit.

In the invention:

1. tapered gaskets are arranged on the upper cross arm of the front suspension, the lower cross arm of the front suspension and the rod end joint bearing in an up-and-down mode, and therefore the suspension does not interfere with the front wheel edge when jumping up and down.

2. The suspension cross arm is formed by welding a steel pipe structure, and a lightweight suspension system is designed.

3. And the rear steering knuckle is subjected to finite element analysis during design, and is subjected to hollow-out treatment, so that the light wheel rim is designed.

4. In the scheme, the front and the back of the suspension system adopt unequal-length double-cross-arm type suspensions, so that the suspension system has good comfort and controllability.

5. The parameters of the front running system can be finely adjusted by adjusting the rod end joint bearing.

6. The rear driving system can realize double-wheel driving.

Under the premise of ensuring the safety and the strength of the suspension system, the electric kart adopts the unequal-length double-cross-arm type suspension system, and the wheel rim system is designed in a light weight manner through finite element analysis, so that the controllability and the driving comfort of the electric kart can be ensured. The suspension system has the characteristics of small volume and light weight, and can better meet the requirements of competition and entertainment and can also be used for juvenile automobile education.

Adopt unequal length two horizontal arm formula suspensions in this scheme, cycle racing ground clearance can be adjusted according to the road surface condition, when guaranteeing that electronic kart controls the enjoyment, can satisfy more place demands.

When adopting two xarm suspensions in this scheme, install the bumper shock absorber, let the driver more comfortable in driving.

In this scheme the suspension xarm adopts TIG welding technique, and in order to make things convenient for the debugging of later stage cycle racing, the adjustment can be realized to front wheel suspension system parameter.

The electronic kart suspension system is redesigned, manufactured by using a steel pipe, and has the advantages of small size and light weight, and the automobile suspension system can be conveniently subjected to related teaching in the later period.

It should be noted that "inward" is a direction toward the center of the accommodating space, and "outward" is a direction away from the center of the accommodating space.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in fig. 1 to facilitate the description of the invention and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A suspension system of an electric kart is characterized by comprising a pair of front suspension components and a pair of rear suspension components which are symmetrically arranged at two sides of a frame; the two front wheels are respectively connected with the frame through the two front suspension assemblies, and the two rear wheels are respectively connected with the frame through the two rear suspension assemblies; the front suspension assembly and the rear suspension assembly are both of unequal-length double-cross-arm type suspension structures; the shock absorption assembly is arranged between the front suspension assembly and the frame and between the rear suspension assembly and the frame.

2. The suspension system of an electric kart according to claim 1, wherein the front suspension assembly includes a front suspension upper arm, a front suspension lower arm, and a front wheel rim, the front suspension upper arm and the front suspension lower arm being disposed side by side up and down and each being connected to the front wheel rim, the front wheel rim being connected to a steering gear and a front wheel of the electric kart, respectively.

3. The suspension system of an electric kart according to claim 2, wherein the front suspension upper cross arm includes a front suspension upper cross arm main body having an approximately isosceles triangle configuration, a first bushing provided at both ends of one side of the front suspension upper cross arm main body, a first screw hole provided at one vertex of the front suspension upper cross arm main body, a first rod end joint bearing screwed to the first screw hole, a first rod end lock nut screwed to the first rod end joint bearing, and first tapered washers installed at upper and lower sides of the first rod end joint bearing; a bolt penetrates through the first conical gasket and the first rod end joint bearing and then is connected with the upper part of the front wheel edge; and the bolt penetrates through the first bushing and the upper cross arm main body of the front suspension and then is connected with the frame.

4. The suspension system of an electric kart according to claim 2, wherein the front suspension lower cross arm includes a front suspension lower cross arm main body having an approximately isosceles triangle configuration, a second bushing provided at both ends of one side of the front suspension lower cross arm main body, a second screw hole provided at one vertex of the front suspension lower cross arm main body, a second rod end joint bearing screwed to the second screw hole, a second rod end lock nut screwed to the second rod end joint bearing, and second tapered washers installed at both upper and lower sides of the second rod end joint bearing; a bolt penetrates through the second conical gasket and the second rod end joint bearing and then is connected with the lower part of the front wheel edge; a bolt penetrates through the second bushing and the upper cross arm main body of the front suspension and then is connected with the frame; and one end of the shock absorption assembly is connected to the lower cross arm main body of the front suspension, and the other end of the shock absorption assembly is connected to the frame.

5. The suspension system of the electric kart according to claim 2, 3 or 4, wherein the front wheel rim comprises a front knuckle, a front hub, a front bearing, a front steel sleeve and a front locknut, the front knuckle comprising a first connecting portion and a second connecting portion; the first connecting part is rod-shaped, and the tail end of the first connecting part is provided with an external thread section; the second connecting part is arranged perpendicular to the first connecting part, is of an approximate U-shaped structure, and is connected with the upper cross arm of the front suspension and the lower cross arm of the front suspension at two free ends respectively; the middle part of the second connecting part is oppositely provided with a first connector and a second connector, the first connector is connected with a steering gear of the electric kart, and the second connector can be used for being connected with a brake caliper; the number of the front bearings is two, the two front bearings are respectively arranged at two ends of the front hub in an interference fit manner, and the first connecting part sequentially penetrates through the front bearings, the front hub, the front bearings and the front steel sleeve and then is connected with the front locking nut; the first connecting part is connected with the two front bearings in an interference fit manner; one end of the front wheel hub is provided with a third connector which can be connected with a brake disc of the electric kart; the other end is provided with a fourth connector which is connected with the rim of the front wheel.

6. The suspension system of an electric kart according to claim 1, wherein the rear suspension assembly includes a rear suspension upper arm, a rear suspension lower arm, and a rear wheel rim, the rear suspension upper arm and the rear suspension lower arm being disposed side by side up and down and each being connected to the rear wheel rim, and the rear wheel rim being connected to a reduction motor and a rear wheel of the electric kart, respectively.

7. The suspension system of an electric kart according to claim 6, wherein the rear suspension upper cross arm includes a rear suspension upper cross arm main body including a U-shaped first body and a rod-shaped second body provided at the first body opening to be connected to both free ends of the first body; the third connecting part is arranged in parallel with the second main body and fixed at the U-shaped vertex of the first main body, and the third bushings are arranged at two ends of the first main body and two ends of the third connecting part; and the bolt penetrates through the third bushing and the second main body and then is connected with the frame, and the bolt penetrates through the third bushing and the third connecting part and then is connected with the upper part of the rear wheel edge.

8. The suspension system of an electric kart according to claim 6, wherein the rear suspension lower cross arm includes a rear suspension lower cross arm main body including a U-shaped third body and a rod-shaped fourth body provided at the third body opening to be connected to both free ends of the third body; the fourth connecting part and the fourth main body are arranged in parallel and fixed at the U-shaped vertex of the third main body, and the fourth bushings are arranged at two ends of the third main body and two ends of the fourth connecting part; a bolt penetrates through the fourth bushing and the fourth main body and then is connected with the frame, and the bolt penetrates through the fourth bushing and the fourth connecting part and then is connected with the lower part of the rear wheel edge; one end of the shock absorption assembly is connected with the lower cross arm main body of the rear suspension, and the other end of the shock absorption assembly is connected with the frame.

9. The suspension system of the electric kart according to claim 6, 7 or 8, wherein the rear wheel rim comprises a rear steering knuckle, a rear hub, a rear bearing and a rear snap spring, the number of the rear bearings is two, the two rear bearings are respectively arranged on two sides of the rear steering knuckle in an interference fit manner, a brake caliper of the electric kart is fixed on the rear steering knuckle through a bolt, and a fixed shaft at one end of the rear hub sequentially penetrates through a brake disc and is connected with the rear bearing in an interference fit manner; one end of the rear wheel hub, which is positioned at the inner side of the fixed shaft, is provided with a fifth connector for connecting with a brake disc of the electric kart, and the other end of the rear wheel hub is provided with a sixth connector for connecting with a rim of a rear wheel; and the top and the bottom of the rear steering knuckle are respectively provided with a seventh connector and an eighth connector which are respectively connected with the upper cross arm of the rear suspension and the lower cross arm of the rear suspension.

10. The suspension system of an electric kart as recited in claim 1, wherein the front upper cross arm and the front lower cross arm of the front suspension assembly and the rear upper cross arm and the rear lower cross arm of the rear suspension assembly are made of steel pipes.