JPH1016788A - Electrically-driven vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrically-driven vehicle in which an occupant is comfortably boardable with elbowroom as it is compact in size and high in mobility and further provided with a broad floor excellent in rigidity. SOLUTION: This vehicle is equipped with a main floor 22 being situated in the more rearward than front wheels 10, and with a width of more than the opposite space of both symmetrical inner edges, and a front floor with the width narrower than an inner edge of the front wheels 10, and extendedly installed in the main floor 22 so as to be projected into an interval between both these front wheels 10, while it provided with a main frame 34 bending along both sides and a front end of the main floor 22, and a front frame 32 projectingly installed in a front end of the main frame 34 with an opposite space of less than the width of a front floor, respectively. In this constitution, the main frame 34 holds the main floor 22 and a single seat from the downward, and also this frame 34 supports the front floor from the downward while it holds a steering control part C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle having a pair of left and right front wheels and rear wheels, and more particularly to an electric vehicle in which only one occupant rides.

[0002]

2. Description of the Related Art An electric wheelchair is used when a person with weak legs moves, and a golf carry is used for moving a person on a golf course. In general, these vehicles are electric vehicles powered by a battery. It is. FIGS. 9 (perspective view) and 10 (plan view) show an example of this type of single-seat electric vehicle.

The vehicle shown in FIGS. 9 and 10 has a structure in which front and rear wheels a and b are provided two by two, and the front two wheels a are steered by a steering wheel c. c1 rotates and the front wheel a is directed in the desired steering direction. A battery e is mounted below the single seat (seat) d in the rear half of the vehicle body. The rear wheel b is driven by a motor (not shown) using the battery e as a power source. Further, a rectangular flat floor g on which the occupant rides his / her foot is provided in front of the battery e. Further, in front of the floor g, a front wheel a is located, and between the front wheels,
Handle post c1 and handle post c
A steering mechanism that steers the front wheel by one rotation is interposed, and the steering mechanism and the front wheel a are covered by a semi-cylindrical fender h that rises upward from the front end of the floor f.

[0004]

In order to use such an electric vehicle as an electric wheelchair or a golf carrier for one person, it is important that the vehicle be small and turn around. . For this reason, the configuration of each part is considerably reduced in accordance with the required vehicle size, and the floor g is also kept to a minimum size at present. Therefore, in a conventional vehicle of this type, even if a certain level of performance is obtained in terms of mobility, the occupant may hit the fender h due to the narrow floor on which the feet are placed, resulting in an unnatural riding posture. This causes a problem that the user is forced to take it. Of course, if the position of the fender h is moved forward, it is possible to set the floor wide, but in that case, both the front wheels are moved forward, or the front wheels are protruded left and right. This requires an increase in the overall length or width of the vehicle and an increase in the size of the vehicle, which causes a problem in terms of mobility.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The present invention has a small vehicle having high mobility and a floor having a large area and high rigidity, so that the occupant can afford it. An object of the present invention is to provide an electric vehicle that can be boarded and has excellent comfort.

[0006]

The present invention has the following arrangement to solve the above-mentioned problems. That is, claim 1 of the present application
The described invention supports a pair of left and right front wheels and a rear wheel, a single-seat seat on which one occupant sits, a floor protruding forward below the single-seat seat, and a front wheel provided in front of the floor. In an electric vehicle including a frame structure that supports a steering unit, the floor is located behind the front wheels and has a width equal to or greater than the facing distance between inner edges of the left and right wheels, and an inner edge of the front wheels. A main frame having a narrow width and extending along the main floor so as to protrude between the front wheels and bending along both sides and a front end of the main floor; At the front end of the frame, there is provided a front frame protruding with an opposing interval equal to or less than the width of the front floor, and the main frame is provided with a front frame. Holds the main floor and monodentate sheet from below, the front frame is to hold the steering unit to support the front floor from below.

Therefore, in the invention according to the first aspect of the present invention, the front floor is extended in front of the main floor, so that the vehicle can be seated with a margin without increasing the width of the whole vehicle, and the front floor is provided with the front wheels. Since the width is set to be smaller than the inner edge, the vehicle width is not enlarged and the mobility of the vehicle is not impaired.
Further, since each floor is supported from below by the main frame and the front frame, sufficient rigidity can be obtained for the floor even if the floor area is enlarged.

[0008] The invention described in claim 2 of the present application is the above-described claim 1.
A steering shaft having a steering wheel fixed to an upper end portion, a steering shaft support portion rotatably supporting the steering shaft, and changing a directivity angle of the front wheel to a rotational motion of the steering shaft. A front-wheel directing mechanism that converts the motion into a directional motion to be performed, wherein the steering shaft support is an upper steering shaft support that supports an intermediate portion of the steering shaft, and a lower side that rotatably supports a lower end of the steering shaft. The lower steering shaft support, the front wheel support mechanism, and the front wheel directing mechanism are held below the front frame by a front frame.

As described above, since the lower steering shaft support, the front wheel support mechanism, the front wheel directing mechanism, and the like are held below the front frame, they do not hinder the setting of the front floor. A sufficient area can be easily set on the floor.

According to a third aspect of the present invention, a front wheel support mechanism includes a support plate portion held below a front frame, a pair of left and right suspension arm brackets fixed to the support plate portion, and A pair of left and right suspension arms are supported by a suspension arm bracket so as to be swingable in the vertical direction and rotatably support the front wheels, and the front wheel pointing mechanism is configured to direct each front wheel in the pointing direction and the turning direction. A pair of left and right front wheel brackets movably supported, a connection plate fixed to a lower portion of a steering shaft, and a pair of left and right tie rods axially mounted on the connection plate and each of the front wheel brackets; Is in the straight traveling direction, the center of the shaft attachment portion between the connection plate and each tie rod is aligned with the suspension. And it is obtained by so as to coincide with the swing center axis in the vertical direction of emission Deployment arm.

According to the third aspect of the present invention, when the suspension arm swings up and down, the tie rod also swings. At this time, the center of the shaft attachment portion of the tie rod is at the center of the suspension arm. Since the suspension axis and the arm bracket are aligned with each other, no excessive force is applied to the suspension arm or the arm bracket, and the swing can be smoothly performed, and good durability and life can be obtained.

In the invention according to claim 4 of the present application, in order to simplify the configuration, a lower steering shaft support portion for rotatably supporting the lower end of the steering shaft is provided on the support plate portion. ing.

Further, in the invention described in claim 5 of the present application, the lower steering shaft support portion is formed by a cylindrical member that rotatably supports the lower end portion of the steering shaft, and the support plate is orthogonal to the steering shaft. To have an inclined portion that is inclined obliquely upward from the rear to the front, and the cylindrical member is fixed to the inclined portion so that the center axis thereof is orthogonal to the inclined portion, so that the steering shaft can be easily assembled. In addition, when welding the cylindrical member, the work becomes easier.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an overall explanatory view of a vehicle body structure of an electric four-wheeled vehicle according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a plan view, FIG. 6 is a plan view illustrating the frame and the steering unit, FIG. 7 is a plan view showing only the structure of the frame shown in FIG. 3, and FIG. 8 is a side view of the one shown in FIG.

As shown in FIGS. 1 to 3, the electric four-wheeled vehicle according to this embodiment has a pair of left and right front wheels 10, 10 and rear wheels 12, 12, and the vehicle body is mainly a front front body. A and a rear body B at the rear. Rear body B
Is provided with a single-seat seat 14 on which an occupant sits alone.

As shown in FIG. 4 and FIG. 5, the electric four-wheeled vehicle
A steering unit (steering unit) C for directing 0, 10 to the left, right, or front of the vehicle is provided. The steering unit C includes a steering shaft (steering shaft) 60 that is rotated by an occupant operating the steering wheel 16, and a steering shaft 60. A steering shaft support portion 62 that rotatably mounts a steering shaft 60 at a front portion of the vehicle body;
A front wheel directing mechanism 64 for converting the turning motion of the front wheels 10 into left and right or frontal directing motions;
0, a front cover (front cover) 66 that covers the upper steering shaft support 62, the lower steering shaft support 78c, the front wheel directing mechanism 64, and the like, and a front cover support 68 for fixing the front cover 66 to the vehicle body. Have. The steering shaft support 62 is fixed to the front frame 32 of the vehicle. Further, the cover support portion 68 is located in front of the steering shaft 60 and at the center of the vehicle body, and stands upright on the steering shaft support portion 62 to be fastened. The front cover 66 is supported and fixed to the front side of the cover support 68.

The vehicle has a luggage storage basket 7 at its front.
The storage basket 70 is fastened and fixed to the front cover support portion 68 with the front cover 66 interposed therebetween. Furthermore, a main frame 34 located below the main floor 22 of the vehicle
A front frame 32 having a width narrower than the main frame 34 is extended slightly obliquely upward and forward from the front end of the main floor 34, and the front floor 23 protruding forward and toward the center of the front end of the main floor 22. Support,
The steering shaft support 62 is tilted backward and the front frame 3
2 is fixed by welding at a position forward of the center.

Further, the embodiment will be described in detail. Figure 1
As shown in FIG. 3, the front wheels 10, 10 are located substantially at the center and above the left and right front wheels 10, 10 at the front of the vehicle body of the electric four-wheeled vehicle.
10 Steering handle (tiller handle type) 16
Is provided. The front cover 66, which covers the front body A below the handle 16, protrudes forward from the front wheels at the center in the width direction sandwiched by the front wheels 10 and covers the front end of the vehicle body. Front fender covering 10 (the lower part becomes a tire house) 20, 20
The upper part is integrally formed with a front leg shield 18 standing upright.

On the left and right sides of the front body A, front fenders 20, 20 are provided in a substantially arc shape that project upward to cover the front wheels 10, 10, respectively. Is formed between the left and right front fenders 20, and a headlamp house 21a for accommodating the headlamp 21 is formed at the front. A recess 18a is formed forward and inward at the lower left and right sides of the front leg shield 18 adjacent to the front fenders 20, 20, so that the upper part of the front fender 20 is widely opened.

In the front body A, the front wheels 10, 1
A flat main floor 22, which is a footrest, is formed at the rear of 0, and the main floor 22 has a width equal to or larger than the interval between the inner edges of the left and right front wheels when the vehicle is traveling straight. A front floor 22a narrower than the main floor 22 is formed at a front portion of the main floor 22, and is located between the fenders 20 and 20 that cover the front wheels 10 and 10. The side edges of the main floor 22 are front fenders 20, 20.
A portion 22b is formed extending from the rear to the rear in a mountain-like manner. With this protruding portion 22b, the occupant can prevent the foot from being shifted outward from above the main floor 22.

Further, on the rear side of the front leg shield 18, the front of the front floor 23 is stepped higher from the front edge thereof so that the left and right front fenders 20, 20 are formed.
The lower part of the steering shaft cover body 72 that covers the steering shaft 62 from the rear is slightly recessed into the center of the raised portion in the width direction of the vehicle body. It is erected in. When the lower portion of the steering shaft cover body 72 is recessed in this way, the rear surface is not recessed and is formed on a surface parallel to the steering shaft 60 (7 in FIG. 4).
2 ′), the length of the front floor 23 in the front-rear direction can be increased, and the floor area and footrest space can be greatly increased.

The rear body B is located rearward from the main floor 22 and has a substantially rectangular shape as a whole, and has a case structure 26 at the front for accommodating a battery and a motor drive unit 24. At the front of the case structure 26, a cover body 26a of the battery storage portion is provided detachably, and at the rear of the structure 26 at the side of the vehicle body in the left-right direction, the rear wheels 12, 1 are provided.
The rear fender 28 covering the projection 2 protrudes and is provided smoothly and continuously. The single seat 14 on which an occupant sits is fixedly or rotatably mounted on the upper part of the case structure 26.

In the front body A and the rear body B of the electric four-wheeled vehicle, a frame for supporting a stress on the vehicle body is provided. In this frame, as shown in FIGS. 4 to 8, a front frame 32 having a narrow U-shape is provided at a front portion of the vehicle body, and a wide U-shaped main frame 34 is provided at a center portion. And each is made of a pipe material. The front frame 32 is welded and fixed to the front end of the in-frame 34 with a U-shaped base end portion facing forward and both end portions facing rearward.

A rear frame 36 extends rearward from the rear of the main frame 34. The main frame 32 has a shape along both sides and the front end of the main floor 22, and holds the main floor 22 from below, so that the main floor 22 has sufficient rigidity. . A bottom plate 34b is fixed by welding to a portion of the main frame 34 that is sandwiched between the U-shaped portions and that is located below the main floor 22. The front frame 32 has a shape along both sides of the front floor 22a.
a is held from below, and sufficient rigidity is obtained for the front floor 22a. In addition, since both the front frame 32 and the main frame 34 have a simple U-shape, they can be configured at low cost and can have high strength and rigidity. The main frame 34 in this embodiment has its front end center deformed into an oval cross section as shown in 34d in FIG. 5, so that the main frame 34 is located between the deformed portion and the main floor located above it. A gap is formed, and the main harness and the brake cable CA pass through the gap.

Further, the front frame 32 includes a front portion of the front body A, the front wheels 10, 10, and the steering shaft support portion 6.
2. Supports front suspension, etc. That is, U-shaped front wheel support frames 74f and 74r are provided at the front and rear two places of the front frame 32 as support members of the front suspension.
Are welded and fixed so as to connect both side parts.

The supporting frame members 74f and 74
r, a connecting portion 78a that pivotally supports a swing shaft 76a at the base end of the left and right suspension arms 76 so as to swing freely.
And a support plate portion 78b made of a bent band material fixed so as to span the frame bodies 74f and 74r.
And a steering shaft 6 provided in front of the plate portion 78b.
A suspension arm bracket 78 provided with a lower steering shaft support portion 78c formed of a cylindrical member that rotatably supports the lower end of the zero is attached and fixed by welding.

The support plate portion 78b has an inclined portion 78b1 which is inclined obliquely upward from the rear to the front.
The steering shaft support portion 78c, which is a cylinder, is fixed upright on the inclined member 78b1 so that its central axis is orthogonal to the steering shaft support portion 78c, and is set so as to coincide with the central axis of the steering shaft 60. Have been. That is, the support plate portion 78b is bent at an angle such that the inclined portion 78b1 is perpendicular to the central axis of the steering shaft 60.
For this reason, the assembling work of the steering shaft 60 can be easily performed, and the shape of the steering shaft support portion 78c can be made a simple cylindrical shape, so that the welding operation to the support plate portion 78b can be easily performed. become able to. The bent shape of the support plate portion 78b is
This is also advantageous in increasing the durability of the slab.

The suspension arm 76 has a bifurcated shape in which two swing shafts 76a are provided at each of the right and left base ends, and the tip is fixed to the same position.
The front end of the suspension arm 76 is provided with a front wheel bracket 76b which pivotally supports the front wheels 10, 10 so as to be rotatable and swingable right and left.

(Upper steering shaft support 62) The steering shaft 60 is supported on the floor via the upper steering shaft support 62. As shown in FIGS. 4 to 8, the upper steering shaft support 62 is provided. The lower part 62a1 of the bent part is welded to the front inner part of the float frame 32 with the end directed forward, and the upper part 62a2 of the bent part is formed of a pipe material bent in an L-shape when viewed from the side. Frame 3
2 and right and left support pipes 62a, 62a standing substantially vertically upward, and a plate material having a substantially triangular shape, the width of which is reduced toward the front, and the upper side 62 of the pipe 62a.
a2 left and right reinforcing plates 62b, 62b connecting the front surface and the front end of the front frame 32;
a and a plate plate 62c connecting the upper ends of the plate plates 62a and 62a.
And a holder 62d for pivotally supporting the steering shaft 60.

Between the left and right reinforcing plates 62b, both ends of a headlamp bracket 84 for mounting a headlamp are fixed.
b, 62b are brackets 6 of the front cover support.
8b. For this reason, the reinforcing plate 62
A large lateral rigidity is obtained for b and 62b by both members 84 and 68b.

The steering shaft 60 is formed at one end thereof with an elongated hole 60a so that the steering shaft 60 can be bent at a certain angle above the position of the holder 62d (to be tiltable). The angle of the upper part of the steering shaft 60 can be changed by changing the mounting position of one of the bolts 60b with one long hole. The upper steering shaft support 62 and the lower steering shaft support 78c constitute a steering shaft support that supports the entire steering shaft.

(Front wheel pointing mechanism 64) This front wheel pointing mechanism 6
4 includes a pair of left and right front wheel brackets 76 that movably support the front wheels 10, 10 in the pointing direction and the turning direction.
b, 76b, a connection plate 82 fixed near the lower end of the steering shaft 60, and a pair of left and right tie rods 80 respectively mounted on the connection plate 82 and the front wheel brackets 76b, 76b. ing. Then, the steering shaft 60 is rotated by the operation of the steering wheel 16 by the occupant, and when the tie rod connecting plate 82 swings, the front wheel bracket 76 b
Swings the front wheels 10,10. Therefore, handle 1
The left and right front wheels 10, 10 can be directed leftward, rightward, or forward according to the steering direction of the steering wheel 16 according to the rotation direction of the vehicle 6, and the electric vehicle can be directed in a desired direction of the occupant.

A cushion unit 7 composed of a coil spring is provided between the vicinity of the front wheel bracket 76b of the suspension arm 76 and the center of the fender support frame 38.
6c is interposed to improve ride comfort and running stability. Also, in the front wheel directing mechanism 64, the center of the shaft attachment portion between the connection plate 82 and each tie rod 80 is
When the front wheels 10, 10 are oriented in the straight running direction, the center of the connecting portion between the connection plate 82 and the tie rods 80, 80 coincides with the vertical axis of the suspension arm 76 in the vertical direction. I have. For this reason,
When the suspension arm 76 swings up and down, no excessive force is applied to the swing shaft 76a and the suspension arm 76, and the durability and life of each member can be improved.

Here, a fender support frame 38 for supporting a load on the front fender 20 is provided on the rear surface of the front fender 20. The support frame 38 is fixed to the front frame 32 and the main frame 34 by welding. That is, as shown in FIGS. 2 and 3, the support frame 38 includes a front part 38a, a center part 38b, and a rear part 38c. The front end 38a1 of the support frame 38 is
The front portion 38a is welded and fixed to the side surface of the front fender 20 and extends rearward along a lower surface portion of the front fender 20 from a position in contact with the fender 20. Central part 3
8b, the fender 2 is bent outward in the left-right direction.
0, the rear end 38c bends slightly inward from near the outer end, and the rear end 38c1 is fixed to the shoulder 34a of the main frame 34 by welding.

Here, as shown in FIG. 2, the fender support frame 38 has a generally C-shape with a downward opening in a side view, and the upper portion thereof has the fender support frame 38 in a side view.
0 along the back. Further, a support portion 40 for a cushion unit of a front suspension is formed in the upper part of the front portion 38a of the support frame. In addition, from the center portion 38b of the support frame to the rear portion 38c, it bends in an L shape in plan view, and
It is formed in a shape widely corresponding to the foot rest surface portion 20f on the upper surface. Since the fender support frame 38 is provided as described above, the support rigidity of the front fender 20 is increased.

As shown in plan view in FIG. 3, the main floor 2 is located substantially at the center of the vehicle body and at the rear of the front body A.
There are two. The central portion of the vehicle body having the main floor 22 in the front body A is recessed so that the side edges are recessed compared to the front and rear of the vehicle body (a recess 42 is formed).

That is, the side edges of the front fenders 20, 20 near the front wheels 10, 10 are the front-wheel-side maximum vehicle body width Tf.
In addition, the side edges of the rear fenders 28, 28 near the rear wheels 12, 12 are the rear-wheel-side maximum vehicle body width Tr, and the vehicle body center width Tc is the front-wheel-side maximum vehicle body width Tf. And the width is smaller than both of the rear-wheel-side body maximum width Tr (Tc <Tf, Tc <Tr). Further, the width Tc of the narrowest portion at the center of the vehicle body is determined by the seat 1
4 (Ts ≒ Tc). Therefore, when the occupant gets on the electric four-wheeled vehicle and aligns his / her feet, he / she can put his / her feet from the main floor 22 to the front floor 22a.

[0038]

As described above, in the invention according to the first aspect of the present invention, the front floor projecting between the front wheels is formed in front of the main floor, so that a large floor area can be obtained, and the occupant can afford a single seat. Since the seat can be seated and each floor is supported from below by the frame, high support rigidity can be obtained.

According to the second aspect of the present invention, the lower steering shaft support portion of the steering portion can be held below by the front frame, and the front wheel support mechanism and the front wheel directing mechanism can be held below the front frame. Thus, the mechanism does not hinder the setting of the front floor, and a sufficient area can be easily set on the front floor.

According to a third aspect of the present invention, in the front wheel supporting mechanism, the center of the shaft attachment portion between the connection plate and each of the tie rods is set such that when the front wheel is directed straight, the connection plate and each of the tie rods are aligned. The center of the shaft attachment portion is made to coincide with the swing center axis in the vertical direction of the suspension arm, so that no excessive force is applied to the tie rod when the suspension arm swings. In addition, the durability and life of the tie rod can be improved.

In the invention according to the fourth aspect of the present invention, the lower plate for supporting the lower end of the steering shaft is rotatably provided on the support plate, so that the structure is simplified. Can be achieved.

Further, according to the fifth aspect of the present invention, the inclined surface of the support plate is formed so as to be orthogonal to the center axis of the steering shaft, and a cylindrical member is fixed to the inclined surface so as to be orthogonal to the inclined surface. Since the member is a lower steering shaft supporting portion that rotatably supports the lower end of the steering shaft, the steering shaft can be easily assembled, and work is easy when welding the cylindrical member. Can be done.

[Brief description of the drawings]

FIG. 1 is an overall explanatory diagram of a vehicle body structure of an electric four-wheeled vehicle according to one embodiment of the present invention.

FIG. 2 is a side view of the electric four-wheeled vehicle.

FIG. 3 is a plan view of the electric four-wheeled vehicle.

FIG. 4 is a side view illustrating the structure of the front part of the vehicle body of the electric four-wheeled vehicle.

FIG. 5 is a perspective view of a front portion of a vehicle body of the electric four-wheeled vehicle.

FIG. 6 is a plan view illustrating a frame and a steering unit of the electric four-wheeled vehicle.

FIG. 7 is a plan view showing only the structure of the frame of the electric four-wheeled vehicle.

FIG. 8 is a side view shown in FIG.

FIG. 9 is a perspective view showing a conventional electric four-wheeled vehicle.

FIG. 10 is a plan view of a conventional electric four-wheeled vehicle.

[Explanation of symbols]

 10, 10 Front wheel 12, 12 Rear wheel 14 Single seat 22 Main floor 22a Front floor 23 Front floor 32 Front frame 34 Main frame C Steering unit 60 Steering shaft 62 Steering shaft support 62a Upper steering shaft support 64 Front wheel pointing mechanism 76 Suspension Arm (front wheel support) 76b Front wheel bracket 78b Support plate 78b1 Inclined portion 78c Lower steering shaft support 80 Tie rod 82 Connection plate

Claims (5)

[Claims] 1. A single seat that supports a pair of left and right front wheels and a rear wheel, and in which one occupant sits, a floor protruding forward below the single seat, and a front wheel provided in front of the floor. An electric vehicle having a frame structure that supports a steering portion, wherein the floor is located behind the front wheels and has a width equal to or greater than the facing distance between inner edges of the left and right front wheels, and the facing distance between the front wheels. A main frame having a narrower width and extending along the main floor so as to protrude between the front wheels, and a main frame bent along both sides and a front end of the main floor; A front frame protruding from the front end of the main frame with an opposing interval equal to or less than the width of the front floor; , Said holds the main floor and monodentate sheet from below, the front frame includes a frame structure for an electric vehicle, characterized in that to hold the steering unit to support the front floor from below. A steering shaft having a handle fixed to an upper end portion; a steering shaft support portion rotatably supporting the steering shaft; and a steering movement of the steering shaft directed to the front wheels. A front-wheel directing mechanism that converts the angle into a directional motion that changes the angle, wherein the steering shaft support portion includes an upper support portion that supports an intermediate portion of the steering shaft, and a lower portion that rotatably supports a lower end portion of the steering shaft. The electric motor according to claim 1, further comprising a side steering shaft support, wherein the lower steering shaft support, the front wheel support mechanism, and the front wheel directing mechanism are held below the front frame by a front frame. vehicle. 3. A support mechanism for a front wheel includes a support plate portion held below a front frame, a pair of left and right suspension arm brackets fixed to the support plate portion, and swings up and down by the suspension arm bracket. A pair of left and right suspension arms that are freely supported and rotatably support the front wheel, and the pointing mechanism is a pair of left and right front wheel brackets that movably support each front wheel in a pointing direction and a turning direction. A connection plate fixed to a lower portion of the steering shaft, and a pair of left and right tie rods respectively attached to the connection plate and the front wheel brackets. When the front direction of the front wheel is in the straight traveling direction, the connection plate The center of the shaft attachment part with each tie rod is the swing center in the vertical direction of the suspension arm. Electric vehicle according to claim 2, characterized in that so as to coincide with the line. 4. The electric vehicle according to claim 3, wherein a lower steering shaft support portion for rotatably supporting a lower end of the steering shaft is provided on the support plate portion. 5. The lower steering shaft support portion is formed by a cylindrical member that rotatably supports the lower end of the steering shaft, and the support plate is obliquely upward from the rear to the front so as to be orthogonal to the steering shaft. The electric vehicle according to claim 4, further comprising an inclined portion inclined to the cylindrical member, wherein the cylindrical member is fixed to the inclined portion such that a center axis thereof is orthogonal to the inclined portion.