JP2518228Y2 - Small three-wheel electric vehicle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a small three-wheeled electric vehicle for people with impaired traveling or elderly people, in which the traveling speed is reduced by the steering angle of the steering wheel. The present invention relates to a small three-wheeled electric vehicle provided with a speed reducer for preventing a fall due to a sudden steering wheel or the like.

[Conventional technology]

In this type of small three-wheeled electric vehicle, conventionally, as shown by the phantom line (a) in FIG. 4, the deceleration rate is increased so that the deceleration increases as the steering handle is steered left and right. It was constant. Alternatively, JP-A-60-180402
As shown in FIG. 4 of the publication, there has been one that increases the deceleration rate according to the turning angle of the steering handle.

[Problems to be solved by the device]

Certainly, when these steering handles are turned largely, a large deceleration effect can be obtained and an emergency situation such as a fall can be avoided. Since the deceleration effect appears just by operating, even if the driver is operating with the intention of going straight, if the steering handle is accidentally cut due to unevenness of the road surface regardless of the intention to go straight, Although it was a slight deceleration, it was decelerated unexpectedly, so the riding sensation was not favorable.

An object of the present invention is to provide a vehicle in which the deceleration control is finely changed according to the steering angle so that the feeling of riding can be further improved.

[Means for solving the problem]

According to the characteristic configuration of the present invention, in a small three-wheeled electric vehicle having a front wheel to be steered and a pair of left and right rear wheels, the traveling speed is reduced according to the operation angle of a steering handle for steering the front wheel. A traveling decelerating means is provided, wherein the decelerating means operates such that the traveling speed is equal to or higher than a set value, and the steering wheel is steered to a predetermined first set steering angle or more set on both left and right sides thereof including a straight traveling state. When decelerated when operated, and when the steering operation angle of the steering handle is less than the first set steering angle, the deceleration operation is configured to be inactive, and When the steering handle is steered more than the second set steering angle set larger than the first set steering angle, the first set steering angle operation and the second set steering angle The deceleration rate in the region between Located that it is configured to, the effects thereof are as follows.

(Operation) That is, the deceleration means should be operated only in a high-speed traveling state where there is a risk of falling due to a sudden steering wheel operation, and the deceleration means is not activated when the traveling speed is equal to or lower than the set value.

When the traveling speed is equal to or higher than the set value, the speed reducing means is operated, but the speed means is not operated in the steering state where the steering angle is less than the set steering angle, which makes it difficult to judge whether or not the vehicle is traveling straight.

Further, even when decelerating during steering in a high-speed traveling state, the degree of deceleration is changed between a state in which the steering operation angle is small from the straight traveling state and a state in which the steering angle is considerably large.

[Effect of device]

Therefore, at low traveling speeds below the set speed, there is little risk of falls, etc. during high-speed steering, and conversely, a speedy steering operation can be performed by not operating the deceleration means. Then, by operating the deceleration means and avoiding falls due to a sudden steering wheel, etc., if the state is less than the set operation angle that is almost the same as the straight running state, the deceleration means is not operated and the riding feeling is made preferable. There is.

In addition, the deceleration in the high-speed steering state is also reduced by decelerating when the steering operation angle is small and decelerating when the steering operation angle is large so that the former is gentle and the latter is steeper. In addition to the effect of preventing overturning by means of slowing down, gentle deceleration in an area with a small steering operation angle that is unlikely to cause an immediate fall will avoid sudden deceleration and improve maneuvering operability. It is designed for convenience of use suitable for running and ensuring the fall prevention effect.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, a single front wheel (2) for steering and a front steering wheel (2) are operated on a vehicle body (1) having a metal pipe frame and a resin cover attached thereto. The steering wheel (3), the pair of left and right rear wheels (4), and the seat (5) are provided to form a three-wheel type small three-wheel electric vehicle.

The pair of rear wheels (4) are pivotally supported by a reduction case (7) equipped with an electric motor (6), and the electric motor (6) is supplied with power from a battery (8) arranged under a seat (5). It has become so.

As shown in FIG. 1, a handle shaft (10) is rotatable around a vertical axis (P) on a boss (9) standing on the front part of a pipe frame (1a) constituting a vehicle body (1). The front wheel (2) is rotatably supported by a suspension arm (11) that is vertically supported by a lower part of the handle shaft (10) and is supported by the handle shaft (10). The handle (3) at the upper end, various switches (12) including the forward / reverse switching switch, and the accelerator lever (13),
And an operation box (15) provided with a headlight (14) and the like.

The handle shaft (10) has a handle shaft base (10a) through which a boss (9) is pierced, and a handle shaft upper part (10b) pivotally connected to the upper end of the handle shaft base (10a) via a pin (16). And normally, as shown in FIG. 1,
By externally fitting the sleeve (17) to the pivot connection part, the upper part of the handle shaft (10b) is erected and connected concentrically with the handle base part (10a), and this electric vehicle is loaded into a passenger car and moved. When doing so, by pulling up the sleeve (17) and removing it from the pivotal support portion, the handle shaft upper part (10b)
To store compactly. The seat (5) can be removed from the vehicle body (1) during the loading movement.

As shown in FIG. 1, the bracket (18) is extended from the lower end of the boss (9) and
8) The pontentiometer (19) is attached to the handle (3), and the gear interlocking mechanism (20) is provided on the pontentiometer (19) shaft and the lower end of the handle shaft base (10a).
It is formed as a mechanism for detecting the steering angle of the.

As shown in FIG. 5, a channel-shaped handle pedestal (21) is attached to the upper end of the handle shaft upper part (10b), and an exterior cover (22) is fixed from below the handle pedestal (21). It is configured accordingly. On both side walls (21A) and (21A) of the handle cradle (21), side walls (21
A) and (21A) are formed with front and rear notches (21a) and (21a) that are recessed forward from the rear end face, and side walls (22A) and (22A) of the exterior cover (22) on both side walls thereof. Upper and lower cutouts (22a), (22a) are formed downward from the upper end surface of the crankshaft, and first, the base end of the crank-shaped accelerator lever (13) is inserted into and supported by the front and rear cutouts (21a), (21a). At the same time, by covering the handle cradle (21) with the exterior cover (22) from below, and fitting the upper and lower cutouts (22a) and (22a) into the base end of the accelerator lever, the handle cradle (21) is removed. The accelerator lever (13) can be positioned. In this mounted state, the accelerator lever (13) can swing up and down around the shaft center of its base end, and the accelerator potentiometer (25) and link mechanism (24) mounted on the handle rest (21) Are linked through.

As shown in FIG. 2, a control box (23) incorporating a control device (A) is installed below the seat, and an electric motor drive circuit (26) and a control box (23) are installed in the control box (23). This electric motor drive circuit (26)
And a deceleration means (B) for issuing a deceleration command to the. In other words, the deceleration means (B) receives a command from the CPU in the control device, reduces the motor applied current given by the electric motor (6) drive circuit (26) by the accelerator lever (13), and changes the rotation speed. To change.

Here, the deceleration means (B) operates in accordance with the steering operation of the handle (3), and automatically operates in order to prevent a fall or the like due to an abrupt steering operation. Specifically, i) The deceleration means (B) is operated when the high / low changeover switch (12) for setting the traveling speed is operated at high speed (of course, when operated at high or medium speed). May be).

ii) The deceleration degree is changed according to the steering angle of the handle (3).

 Next, a concrete form of the deceleration degree is shown in FIG.

(A) If the vehicle is traveling straight at the traveling speed (V1), the deceleration means (B) does not operate even if the steering operation is performed up to the first steering angle (Q1).

(B) Next, from the first steering angle (Q1) to the second steering angle (Q2 = 20
The deceleration means (B) operates with a constant deceleration rate up to (°). Therefore, in the region from the first steering angle (Q1) to the second steering angle (Q2), the traveling deceleration that was the speed (V1) at the first steering angle (Q1) is the second steering angle. Handle (3) so that when it reaches the corner (Q2) it will reach the speed (V2)
As the steering operation angle is increased, the vehicle is decelerated proportionally at a predetermined deceleration rate.

(C) When the steering operation angle of the steering wheel (3) further increases and becomes equal to or greater than the second steering angle (Q2), the traveling speed is rapidly switched to a constant low traveling speed (V3).

[Another embodiment]

The deceleration means (B) may be operated in such a manner that when the steering angle exceeds the set angle (Q1), the deceleration rate increases as the steering angle increases, and is limited to that shown in FIG. Not done.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a small three-wheeled electric vehicle according to the present invention. Fig. 1 is a vertical sectional side view showing a steering structure, Fig. 2 is an overall side view, Fig. 3 is a control configuration diagram, and Fig. 4 is a steering system. FIG. 5 is a graph showing a deceleration state with respect to a heading angle, and FIG. 5 is a perspective view showing an accelerator lever mounting structure. (2) ... front wheel, (3) ... steering handle, (4) ...
... rear wheel, (B) ... deceleration means, (Q1) ... first set steering angle, (Q2) ... second set steering angle.

Front page continued (72) Inventor Masahiro Ichihara 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Sakai Works (72) Inventor Shigenori Kimura 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. (72 ) Inventor Yasuhiro Yamamoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Sakai Works (56) References: 57-65506 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A small three-wheeled electric vehicle having a front wheel (2) to be steered and a pair of left and right rear wheels (4), wherein a steering handle for steering the front wheel (2). The traveling speed reducing means (B) for reducing the traveling speed according to the operation angle of (3) is provided, and the traveling speed becomes equal to or higher than a set value, and the steering handle (3) is in the straight traveling state. In addition, when the steering operation is performed at a predetermined first set steering angle (Q1) or more set on both the left and right sides, deceleration operation is performed and the steering operation angle of the steering handle (3) is set to the first steering angle (Q1). If it is less than the first set steering angle (Q1), the deceleration operation is configured to be inactive, and the second set steering angle is set to be larger than the first set steering angle (Q1). When the steering handle (3) is steered beyond the steering angle (Q2), the first set steering angle is set. Q1) and a small three-wheeled motorized vehicle that is configured to more rapidly decelerated than deceleration degree in the area between the second set steering angle (Q2).