JPH01311978A - Compact electric motorcar - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a small electric vehicle used primarily as a wheelchair or as a golf cart by disabled or elderly people.

[Conventional technology]

Conventionally, this main type of small electric vehicle has only been provided with a regulating mechanism that regulates the maximum steering angle of the steering wheel.

[Problem to be solved by the invention]

In this case, the steering wheel is always operated to the maximum steering angle, so if you operate the steering wheel to the maximum angle while driving at high speed, the steering wheel will turn suddenly and there is a risk of falling. If the maximum steering angle was kept to a small angle, it would not be possible to turn around when driving down an alley, making it difficult to use.

An object of the present invention is to provide a small electric vehicle that can be used in a state in which it can make small turns and a state in which it is restricted depending on the driving condition.

[Means to solve the problem]

The characteristic configuration according to claim 1 is as follows: (1) a regulating member for regulating the maximum steering angle of the steering wheel; and (2) a mechanism for varying the maximum steering angle by the regulating member. The features of this vehicle are as follows: ■ In order to adjust the distance between the front and rear wheels, a mechanism is provided that allows the position of either the front or rear wheel to be changed forward or backward without changing the mounting height relative to the vehicle body. The effects are as follows.

[Action according to claim 1] For example, as shown in FIG. 2, the swing regulating member (13) of the rod-shaped projection (12) that swings together with the operation of the control handle (3) is By sliding it in the direction of the arrow and fixing it, the maximum swing angle of the rod-shaped projection (12) can be set to either a large or small angle. Therefore, by providing such a mechanism (15) that varies the maximum steering angle, when a small turn is not required when traveling straight, the second
The maximum steering angle is set to a small value by moving the restriction member (13) to the position of the imaginary line shown in the figure, and in back alleys where turning is required and driving at low speed, the restriction member (13) is moved to the position of the solid line shown in Figure 2. (13) By moving backward and increasing the maximum steering angle, you can drive according to the situation.

[Effect according to claim 1] By varying the maximum steering angle according to the necessity of steering operation, driving safety when driving straight at high speed and turning performance when driving at low speed in back alleys etc. are improved. These improvements have made it possible to provide something useful for this type of small electric vehicle, which often takes the form of three wheels and requires strict design for driving safety.

[Operation according to Claim 2] As shown in FIG. 5, for example, by horizontally moving the rear wheels (8) back and forth, the turning radius determined by the distance between the front and rear wheels and the steering angle of the steered wheels can be changed. Therefore, if the distance between the front and rear wheels is narrowed, the turning radius can be made small, making it possible to make a tight turn, and if the distance between the front and rear wheels is increased, the turning radius can be increased.

[Effect according to claim 2] As a result, when a tight turn is particularly required, the distance between the front and rear wheels can be reduced, and it is possible to secure a narrow turn performance that cannot be obtained only by the steering angle of the steered wheels, and to achieve straight-line high-speed turning. When driving, the distance between the front and rear wheels can be increased to ensure driving safety.

Further, when adjusting the distance between the front and rear wheels, the height of the wheels relative to the vehicle body does not change, so there is an advantage that the vehicle height does not change.

By using the maximum steering angle variable mechanism for the steering wheels together with the front and rear wheel spacing adjustment mechanism, the function can be further enhanced.

〔Example〕

As a small electric vehicle, 3 is aimed at disabled vehicles and elderly people.
Explain the shaft type electric vehicle. A pipe frame (1a) forms a framework, and a vertically oriented pipe frame (2) is attached to the front part of the vehicle body frame (1), in which a cover (lb) integrally molded with resin and also used as a step is fixed to the pipe frame (1a).
The operator seat (4) is installed at the rear of the vehicle body frame (1) by fixing the handle support frame (2B) made of sheet metal with a rectangular cross section and attaching the control handle (3).
and a transmission case (5) containing a differential mechanism (not shown), a driving drive motor (6), and a single steering front wheel (7) attached to the steering handle (3) shaft. A three-wheel small electric vehicle is constructed by arranging a pair of left and right driving rear wheels (8), (8) which are pivotally supported on the lateral end of the transmission case (5).

As shown in FIG. 1, a head tube (9) penetrating vertically is fixed to the handle support frame (2B) which spans the left and right vertical pipe frames (2A), and , a handle stem (10) and a fork stem (11) are attached to this head tube (9), and this fork stem (11) is attached to the head tube (9).
) A steering front wheel (7) is pivotally supported at the lower end to form a steering structure.

On the other hand, batch 'J-(2) that supplies power to the above-mentioned equipment
5) are arranged in pairs on the left and right below the pilot seat (4),
The rear part of the cover (1b) stretched over the pipe frame (1a) is placed in the storage space (21) into which a part of the cover (1b) is turned backward, and the front end of the cover (1b) is placed in the storage space (21). ) The protrusion (IC) that bulges out prevents it from being pulled out forward. In the figure, (26) is a latch lever that turns on/off power transmission from the drive motor (6) to the transmission.

Next, the maximum steering angle variable mechanism (15) will be explained.

As shown in FIGS. 1 and 2, an arc-shaped elongated hole (2b) centered on the axis of the head tube (9) is formed in the handle support frame (2B), and this elongated hole (
2b), a rod-shaped projection (12) that swings left and right around the head tube axis is erected from the fork stem (11), and this rod-shaped projection (12) is operated as the handle is rubbed. The front wheel (7) and the body are configured to be able to swing left and right, and the steering angle of the steering wheel is regulated by the contact between the end of the elongated hole (2b) and the rod-shaped projection (12). This long hole (2b
), a plate-shaped regulating member (13) is further provided on the handle support frame (2B) in which the maximum steering angle is set to a small value.
is provided, and the opposing V-shaped inner end surfaces of the regulating member (13) are configured to receive the rod-shaped projection (12) before it comes into contact with the end of the elongated hole (2b). . Moreover,
This regulating member (13) is slidable in the front-rear direction, and the further forward it is located, the smaller the maximum steering angle is set, and the tightening pole that allows the regulating member (13) to slide in the longitudinal direction) (14) is fixed in the adjusted position. In this way, while sliding the regulating member (13) back and forth, the tightening pole (14) that fixes it at the adjustment position and the elongated hole for inserting the tightening bolt on the regulating member (13) side are aligned at the maximum steering angle. Variable mechanism (1
5).

The mechanism (19) for changing the front-rear spacing of the wheels will be explained. As shown in Fig. 5, the left bracket (18) fixed to the vibe frame (1a) is provided with a plurality of forward threaded members (20) at equal intervals in the front and back, and this female threaded member (20)
By selecting a corresponding pair of pillow blocks, the mounting position of the pillow block (17) can be changed forward or backward. On the other hand, although not shown, there is also a mechanism for changing the mounting position of the wheel axle (16) on the right side bracket on the opposite side, and the rear wheel (8) is integrally positioned in the front and back positions with respect to the steering front wheel (7). Can be changed. Here, the left bracket (18) and its plural female screw members (20) are referred to as a mechanism (19) that can change the front and rear positions of the wheel.

Note that (22) in the figure is a convex lens-shaped cover that condenses sunlight, and functions to take in the light rays to the solar cell module (23) provided inside this cover (22). Therefore, with this solar cell module (23), batch! Perform supplementary charging of J-(25).

[Another example]

■ The mechanism (15) for varying the maximum steering angle may be constructed by driving and sliding the regulating member (13) with an actuator (or, when the traveling speed increases, the regulating member (13) is automatically moved). A configuration may be adopted in which the steering angle is slid in a direction in which the maximum steering angle becomes smaller, and these are referred to as a mechanism (15) for varying the maximum steering angle.

■ The steering wheel may be either the front or rear wheel.

■ When adjusting the distance between the front and rear wheels, the front wheels may be moved.

■ The small electric vehicle shown in the above embodiment may be used as a transport vehicle.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of a small electric vehicle according to the present invention, in which FIG. 1 is a longitudinal sectional side view showing the mounting structure of the steering front wheels, and FIG. 2 is a plan view showing the mechanism for varying the maximum steering angle. FIG. 3 is an overall side view, FIG. 4 is an overall plan view, FIG. 5 is a side view showing a rear wheel sliding structure, and FIG. 6 is a perspective view showing a battery mounting structure. (1)...Vehicle frame, (7)...
Steering wheel, (13)...Regulation member, (15).
...Mechanism for varying the maximum steering angle, (19)...
... Mechanism that can change its position.

Claims (1)

[Claims] 1. A regulating member (which regulates the maximum steering angle of the steering wheel (7))
13) and a mechanism (15) for varying the maximum steering angle by the regulating member (13). 2. A mechanism (19) that allows at least one of the front and rear wheels (7) and (8) to be repositioned forward and backward without changing the mounting height relative to the vehicle body frame (1) in order to adjust the distance between the front and rear wheels. A small electric car equipped with