JPH10304515A - Device for accelerating electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for accelerating an electric vehicle, capable of stopping the traveling of the electric vehicle instantly, even if in an emergency, a driver unconsciously operates an accel lever to the high speed side excessively, advantageous in the aspects of assembling and production cost with a simple structure and highly reliable with less failure. SOLUTION: This accelerating device 21A for an electric vehicle is provided with an accel lever 23, an accel volume (volume shaft 37), an interlocking mechanism 38, which interlocks the accel volume in the direction of opening it (opening direction a), in proportion to the operated amount of the accel lever 23, and an accel activating member, which activates the accel lever 23 in the direction of closing the accel volume (closing direction b). In this case, the interlocking mechanism 38 is constituted in such a way as to mechanically break the circular motion of the lever rotating shaft 23a of the accel lever 23 off the accel volume 37 and simultaneously to return the accel volume 37 to a totally closed state at the time, when the accel volume 37 passes a totally opened state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an accelerator device for an electric vehicle.

[0002]

2. Description of the Related Art In a small electric vehicle such as an electric wheelchair, an accelerator device is provided on a handlebar for steering in the traveling direction. This accelerator device, for example, interlocks an accelerator lever operated by an occupant, an accelerator volume (potentiometer, etc.) for varying the voltage applied to the electric motor for traveling, and an opening direction of the accelerator volume in proportion to the operation amount of the accelerator lever. An interlocking mechanism is provided. Then, the movement of the accelerator lever is transmitted to the accelerator volume via the interlocking mechanism, the accelerator volume is opened in proportion to the operation amount of the accelerator lever, the applied voltage to the electric motor for traveling is increased, and the vehicle speed is increased. Has become.

[0003] In such an accelerator device, even if the occupant immediately (erroneously) excessively operates the accelerator lever to the high speed side in an emergency, the voltage applied to the electric motor is automatically reduced to zero to drive the electric vehicle. Some are configured to stop. Specifically, a detection means such as a sensor or a limit switch for detecting that the accelerator lever is excessively operated, and a program for immediately reducing the voltage applied to the electric motor to zero as soon as there is an input from the detection means. A control means such as a microcomputer provided is provided so that the applied voltage to the electric motor becomes zero at the same time as the accelerator lever is operated excessively, thereby preventing runaway of the electric vehicle (for example, JP-A-5-294165). Japanese Patent Application Laid-Open No. 5-338475, Japanese Patent Application Laid-Open No. 5-338476, Japanese Patent Application Laid-Open No. 6-351110, and Japanese Unexamined Utility Model Application No. H5-11702).

[0004]

However, detection means such as a sensor and a limit switch and control means such as a microcomputer are required, and wiring between these electric components is required. Therefore, there is a problem that the configuration of the accelerator device becomes very complicated, and that the assemblability thereof is deteriorated, so that the production becomes difficult and the production cost increases.

[0005] Further, since many electric components are used, if the waterproofness around the accelerator device is not improved, there is a concern that a failure may occur due to intrusion of water or the operation may be uncertain. Lack.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to quickly stop the operation of an electric vehicle even if an occupant immediately operates an accelerator lever excessively to a high speed in an emergency. It is an object of the present invention to provide an accelerator device for an electric vehicle which has a simple structure, is advantageous in terms of assemblability and manufacturing cost, is less likely to cause a failure, and has high reliability.

[0007]

To achieve the above object, an accelerator device for an electric vehicle according to the present invention is provided in claim 1.
As described in, the accelerator lever operated by the occupant,
With an accelerator volume that varies the voltage applied to the electric motor for traveling, an interlocking mechanism that interlocks the opening of the accelerator volume in proportion to the amount of operation of the accelerator lever, and an accelerator that biases the accelerator lever in the direction that the accelerator volume closes In an accelerator device for an electric vehicle configured to include an urging member, when the accelerator volume exceeds a fully opened state, the rotation of the lever rotation axis of the accelerator lever is mechanically cut off with respect to the accelerator volume, and the accelerator volume is fully reduced. An interlocking mechanism is configured to return to the closed state.

Further, the accelerator device is provided with a full-open position indicating means for allowing the occupant to sense the full-open position of the accelerator volume via an accelerator lever.

The interlocking mechanism according to the first aspect is the third aspect.
As described in the above, an accelerator gear having a limited number of teeth and provided integrally with the lever rotation shaft of the accelerator lever,
A volume gear provided on the volume shaft of the accelerator volume and meshing with the accelerator gear, and a configuration provided between the volume shaft and the volume gear so that only the rotation of the volume gear in the direction of opening the accelerator volume is transmitted to the volume shaft. Rotation direction limiting means, comprising a volume axis biasing member that biases the volume axis in the rotation direction of closing the accelerator volume,
The number of teeth of the accelerator gear and the fixed angle of the accelerator gear to the lever rotation shaft are set so that the accelerator gear is disengaged from the volume gear when the accelerator volume exceeds the rotation position of the volume shaft that is fully opened. Is also good.

Alternatively, the interlocking mechanism according to claim 1 is
As described in claim 4, an accelerator arm provided to rotate integrally with the lever rotation shaft of the accelerator lever, and a rotation arm integrally provided to the volume shaft of the accelerator volume, and the arm tip is provided when the lever rotation shaft rotates forward. An accelerator volume, comprising: a volume arm for interlockingly rotating the volume axis in a rotational direction pressed by the accelerator arm to open the accelerator volume; and a volume axis biasing member for biasing the volume axis in the rotational direction for closing the accelerator volume. The contact treatment position relationship between the accelerator arm and the volume arm is set so that the contact between the accelerator arm and the arm tip of the volume arm is cut off when the rotation position of the volume axis becomes fully open,
The arm tip of the volume arm may be provided so as to be able to fall only in the closing direction of the accelerator volume with respect to the arm base.

According to the first aspect of the present invention, even if the occupant immediately squeezes the accelerator lever to the high-speed side in an emergency, the interlock is established when the accelerator volume exceeds the fully opened state. Since the mechanism mechanically shuts off the rotation of the lever rotation shaft of the accelerator lever with respect to the accelerator volume and simultaneously returns the accelerator volume to the fully closed state, the running of the electric vehicle is immediately stopped. Since this interlocking mechanism operates mechanically, there is no need for electrical detection means such as sensors and limit switches, control means such as a microcomputer, and any wiring, which simplifies the configuration of the accelerator device. This is advantageous in terms of assemblability and manufacturing cost.

According to the second aspect of the present invention, the accelerator device of the electric vehicle is configured so that the occupant can detect the fully opened position of the accelerator volume through the accelerator lever, so that the accelerator lever can be further extended during normal traveling. This eliminates the need for operation and prevents the accelerator volume from being unnecessarily returned to the fully closed state during traveling.

Further, when the interlocking mechanism according to the first aspect is configured as described in the third aspect, if the occupant immediately operates the accelerator lever excessively to the high-speed side in an emergency, the accelerator gear changes to the volume gear and the volume gear. The shaft is interlocked and the accelerator volume is fully opened, but the accelerator gear with a limited number of teeth is immediately disengaged from the volume gear, so the volume shaft becomes free, and the volume shaft biasing member acts to accelerate the accelerator volume. The volume shaft rotates in the closing rotation direction, the voltage applied to the electric motor for traveling becomes zero, and the electric vehicle stops.

Thereafter, when the occupant releases the accelerator lever,
Under the action of the accelerator urging member, the accelerator lever and the accelerator gear try to return to the initial position, and the accelerator gear meshes with the volume gear again to rotate the volume gear in a direction to close the accelerator volume. At this time,
Since the accelerator volume is already fully closed, the volume axis does not rotate anymore, but the rotation direction limiting means allows the volume gear to rotate with respect to the volume axis,
Because the volume gear idles around the volume axis,
The accelerator lever and the accelerator gear are returned to the initial positions while the accelerator volume is kept in the fully closed state.

Further, in the case where the interlocking mechanism described in claim 1 is configured as described in claim 4, when the occupant immediately operates the accelerator lever to the high speed side in an emergency,
The accelerator arm presses the arm tip of the volume arm to rotate the volume axis in the direction to open the accelerator volume, and the accelerator volume is fully opened, but immediately the contact between the accelerator arm and the arm tip of the volume arm is cut off. The volume axis becomes free,
The volume shaft rotates in the direction in which the accelerator volume closes due to the action of the volume shaft urging member, and the voltage applied to the traveling electric motor becomes zero, thereby stopping the electric vehicle.

Thereafter, when the occupant releases the accelerator lever,
The accelerator lever and the accelerator arm attempt to return to the initial position under the action of the accelerator urging member, and the accelerator arm again comes into contact with the arm tip of the volume arm from the opposite side and rotates the volume arm in the direction to close the accelerator volume. Try to move it. At this time, since the accelerator volume is already fully closed, the volume axis does not rotate, but the tip of the arm can fall in the direction of closing the accelerator volume with respect to the arm base,
Rubbing between the arm tip and the accelerator arm becomes possible, and the accelerator lever and the accelerator arm are returned to the initial positions while the accelerator volume is kept in the fully closed state.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an electric tricycle, which is an example of an electric vehicle to which the present invention is applied, as viewed obliquely from the front right. The electric tricycle 1 includes a platform-type body 4 supported by one front wheel 2 and a pair of left and right rear wheels 3.

The front wheel 2 is supported by a front fork 5 rotatably supported by the front head of the vehicle body 4. A steering handle bar 6 and a control box 7 are provided above the front fork 5. , A basket 8 is provided so as to rotate integrally.

On the other hand, a pedestal 9 is formed at a rear portion of the vehicle body 4 and is higher than the pedestal 9 by which a seat 10 is provided. Inside the pedestal 9, a driving electric motor (not shown) for driving the rear wheel 3 and devices such as a power supply battery, a control device, and a charger are built.

An occupant of the electric tricycle 1 sits down on a seat 10 and places his / her feet on the vehicle body 4 with both hands.
, The front wheel 2 is steered, and the electric tricycle 1 is driven while operating an accelerator lever and various switches, which will be described later, provided on the control box 7.

FIG. 2 is a perspective view of the handlebar 6 and the control box 7, and FIGS. 3 and 4 are a plan view and a right side view of the control box 7, respectively. The handlebar 6 is shaped like a loop that extends right and left from the axis of the front fork 5 and then makes a U-turn toward the center again. A rubber grip 12 is attached to the end so that the occupant can easily grip it. I have.

On the other hand, on the upper surface of the control box 7, a knob 13 for setting a maximum speed and a knob 14 for switching between forward and backward traveling are provided.
Are provided, and several indicator lamps 15 are further provided. Switches 16 and 17 for blinking left and right direction indicators (not shown) are provided on the rear surface of the control box 7.
A horn button 18 and an ignition key 19 are provided.

The accelerator devices 21A and 21B according to the present invention are installed inside the control box 7. The accelerator devices 21A and 21B are arranged, for example, at the rear of a base chassis 22 housed in the control box 7 and have an accelerator lever 23 extending in the vehicle width direction.

The accelerator lever 23 includes an accelerator device 21A,
It is bent and formed into a crank handle shape having a lever rotation shaft 23a pivotally supported by 21B and a lever operation shaft 23b manually operated by an occupant. The portion of the lever operating shaft 23b projects outward from the right side of the control box 7 and is covered with a rubber sleeve 24 for preventing slipping, and the occupant pushes down this portion downward with the right hand to move the lever rotating shaft 23a in the normal rotation direction A. Operate to rotate.

Next, a first embodiment of the accelerator device according to the present invention will be described with reference to FIGS. 5 and 6 (a) to 6 (d).
FIG. 5 is a plan view of the accelerator device 21A, and FIGS.
(d) is a longitudinal sectional view of the accelerator device 21A along the line VI-VI in FIG. The accelerator device 21A is configured as follows.

First, a separate accelerator chassis 26 is fixed on the rear upper surface of the base chassis 22, and a pair of support plates 27L, 27L,
A lever rotation shaft 23a of the accelerator lever 23 is rotatably supported at a portion 27R. A flange 28 is provided near the right end of the lever rotation shaft 23a, and a coil-shaped lever spring 29 is axially mounted between the flange 28 and the right support plate 27R of the accelerator chassis 26.

The left and right ends of the lever spring 29 are respectively engaged with the right support plate 27R and the flange 28, and the lever rotating shaft 23a (the accelerator lever 23) is rotated in the reverse rotation direction B by the torsional biasing force of the lever spring 29, that is, It is always urged in a closing direction b for closing an accelerator volume 36 described later. The lever spring 29 functions as an accelerator urging member according to the first aspect.

A short columnar stopper 30 is provided on the lever rotation shaft 23a so as to rotate integrally with the lever rotation shaft 23a. The stopper 30 projects downward from a square hole 31 formed on the bottom surface of the base chassis 22 (accelerator chassis 26). For this reason, the stopper 30
The rotation of the lever rotation shaft 23a (accelerator lever 23) is allowed by the angle between the contact between the front edge and the rear edge of the square hole 31.
Lever spring when accelerator lever 23 is not operated
The stopper 30 is kept in contact with the front edge of the square hole 31 by the urging force of 29 (see FIG. 6A).

The base chassis 22 (accel chassis)
On the bottom surface of 26), a forwardly inclined protrusion 32 located behind the lever rotation shaft 23a is formed, and an elastic member 33 formed of a spring, rubber, or the like is provided on the front surface of the protrusion 32. The projection 32 and the elastic member 33 function as a fully open position indicating means according to the second aspect. As the accelerator lever 23 rotates in the normal rotation direction A and the stopper 30 of the lever rotation shaft 23a tilts backward, the stopper 30 first comes into contact with the elastic member 33 (see FIG. 6B), and then the stopper
The compression member 30 abuts against the rear edge of the square hole 31 while compressing the elastic member 33 to stop the rotation of the accelerator lever 23 (see FIG. 6C).

On the other hand, an accelerator volume 36 is fixed laterally to a support plate 35 erected at the front of the accelerator chassis 26, and its volume axis 37 is parallel to the lever rotation axis 23a. The accelerator volume 36 is a potentiometer or a similar variable resistor, and adjusts the speed of the electric tricycle 1 by varying the voltage applied from the battery for the power supply to the electric motor for traveling.

Further, the volume shaft 37 is opened in the direction of opening the accelerator volume 36 in proportion to the operation amount of the accelerator lever 23.
There is provided an interlocking mechanism 38 for interlocking and rotating the. This interlocking mechanism 38 includes, as described below, an accelerator gear 39,
A volume gear 40, a one-way clutch 41, and a volume spring 42 are provided.

The accelerator gear 39 is a large gear that is provided integrally with the lever rotation shaft 23a and has a limited number of teeth, and the volume gear 40 is provided on the volume shaft 37 of the accelerator volume 36 and the accelerator gear 39 It is a small gear that meshes with. The one-way clutch 41 is configured to transmit only rotation of the volume gear 40 in the opening direction a, that is, rotation of the accelerator volume 36 in the opening direction, to the volume shaft 37.

It should be noted that the one-way clutch 41 functions as the rotation direction limiting means described in claim 3, but is not limited to the one-way clutch 41, and may be a one-way rotation transmission mechanism such as a ratchet (freewheel). It may be provided as rotation direction limiting means.

One end of the coil-shaped volume spring 42 mounted on the volume shaft 37 of the accelerator volume 36 is connected to the volume shaft 37 (or the one-way clutch 41).
The other end is locked to the accelerator volume 36 itself, and the volume shaft 37 is always attached in the closing direction b by the torsional biasing force of the volume spring 42, that is, in the direction to close the accelerator volume 36. It is getting energized. The volume spring 42 functions as a volume shaft urging member according to the third aspect.

The number of teeth of the accelerator gear 39 and the angle at which the accelerator gear 39 is fixed to the lever rotation shaft 23a exceed the rotational position of the volume shaft 37 where the accelerator volume 36 is fully opened (the state shown in FIG. 6B). At this point, the accelerator gear 39 is set out of engagement with the volume gear 40 as shown in FIG. In this embodiment, the number of teeth of the accelerator gear 39 is four.

Also, as shown in FIG. 6 (b), the stopper 30 provided on the lever rotation shaft 23a is brought into contact with the elastic member 33 at the rotational position of the volume shaft 37 where the accelerator volume 36 is fully opened. The position and shape are determined.

When the accelerator lever 23 is not operated, the accelerator lever 23 is moved to the lever spring 29 as shown in FIG.
Of the lever rotation shaft 23.
The stopper 30 a contacts the front edge of the square hole 31, the accelerator volume 36 is also closed, the voltage of the battery for power supply is not applied to the electric motor for traveling, and the electric tricycle 1 is stopped.

When the occupant depresses the lever operation shaft 23b of the accelerator lever 23 by hand, the lever rotation shaft 23a rotates in the normal rotation direction A, and the accelerator gear 39 also rotates in the normal rotation direction A, thereby turning the volume gear. The rotation of the volume gear 40 is transmitted to the volume shaft 37 via the one-way clutch 41. Therefore, the accelerator lever 23
The accelerator volume 36 is opened in accordance with the amount of rotation of the vehicle, the electric tricycle 1 starts moving, and the vehicle speed is improved.

When the accelerator volume 36 is fully opened, FIG.
Since the stopper 30 of the lever rotation shaft 23a abuts on the elastic member 33 as shown in (b), the occupant can sense the fully opened position of the accelerator volume 36 via the accelerator lever 23.

When an occupant immediately pushes down the lever operation shaft 23b of the accelerator lever 23 excessively in an emergency, the accelerator volume 36 is fully opened temporarily, but immediately as shown in FIG. 6 (c). Since the accelerator gear 39 with a limited number of teeth is disengaged from the volume gear 40, the rotation of the lever rotation shaft 23a is mechanically interrupted with respect to the volume shaft 37, and the volume shaft 37 becomes free, and the volume spring By the operation of 42, the volume shaft 37 rotates in the closing direction b of the accelerator volume 36, the voltage applied to the traveling electric motor becomes zero, and the electric tricycle 1 stops.

Thereafter, when the occupant releases the accelerator lever 23, the accelerator spring 23 is acted upon to release the accelerator lever 23.
23 and the accelerator gear 39 rotate in the reverse rotation direction B, and FIG.
As shown in (d), the accelerator gear 39 is engaged with the volume gear 40 again to rotate the volume gear 40 in the closing direction b for closing the accelerator volume 36.

At this time, since the accelerator volume 36 is already fully closed, the volume shaft 37 does not further rotate in the closing direction b, but the one-way clutch 41 moves in the closing direction b of the volume gear 40 with respect to the volume shaft 37. And the volume gear 40 idles around the volume shaft 37 in the direction b, so that the accelerator lever 23 and the accelerator gear 39 are maintained while the accelerator volume 36 is kept in the fully closed state.
Is returned to the initial position.

Next, a second embodiment of the accelerator device according to the present invention will be described with reference to FIGS. 7, 8 and 9A to 9D. FIG. 7 is a plan view of the accelerator device 21B, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG.
(d) is a longitudinal sectional view of the accelerator device 21B along the line IX-IX in FIG. The accelerator device 21B is configured as follows.

First, similarly to the accelerator device 21A of the first embodiment, the lever rotation shaft 23a of the accelerator lever 23 is rotatable on a pair of support plates 47L, 47R provided upright at the left and right ends of the accelerator chassis 46. It is supported by. Lever rotation axis
A flange-shaped flange 48 is provided near the right end of 23a, and a coil-shaped lever spring 49 is mounted between the flange 48 and the right support plate 47R of the accelerator chassis 46. The left and right ends of the lever spring 49 are respectively locked by the support plate 47R and the flange 48, and the lever rotating shaft 23a (the accelerator lever 23) is constantly urged in the reverse rotation direction B by the torsional urging force of the lever spring 49. This lever spring 49
Functions as an accelerator urging member according to the first aspect.

On the bottom surface of the accelerator chassis 46, there is provided an elastic member 50 formed of a spring, rubber or the like located below the lever rotation shaft 23a. This elastic member 50
Functions as the fully open position indicating means described in claim 2.

On the other hand, an accelerator volume 53 is fixed laterally to a support plate 52 erected at the front of the accelerator chassis 46, and its volume shaft 54 is parallel to the lever rotation shaft 23a. Then, in response to the operation amount of the accelerator lever 23, the volume axis is set in the direction of opening the accelerator volume 53.
An interlocking mechanism 55 for interlocking rotation of the 54 is provided. This interlocking mechanism 55 includes an accelerator arm 56 as described below.
, A volume arm 57, and a volume spring 58.

The accelerator arm 56 is provided rotatably on the lever rotation shaft 23a and extends forward. The tip 56a has the shape of a gear tip. Further, a volume arm 57 is provided with an arm base 57a provided integrally with the volume shaft 54 of the accelerator volume 53 for rotation.
Arm end pivotally provided on shaft 57a via shaft 59
The arm tip 57b is provided so as to be able to fall only in the closing direction b of the volume shaft 54 with respect to the arm base 57a, that is, only in the closing direction of the accelerator volume 53, and the arm spring 60 ( 8 (see FIG. 8). The arm tip
The tip end of the gear 57b has the same shape as the tip end 56a of the accelerator arm 56.

The coil-shaped volume spring 58 mounted on the volume shaft 54 of the accelerator volume 53
One end is locked to the arm base 57a of the volume arm 57, and the other end is locked to the support plate 52 or the accelerator volume 53 itself, and the volume shaft 54 is moved in the closing direction b by the torsional biasing force of the volume spring 58. It is always energized. This volume spring
Numeral 58 functions as a volume shaft urging member according to the fourth aspect.

As shown in FIG. 9A, the arm tip 57b of the volume arm 57 is positioned so as to overlap below the tip 56a of the accelerator arm 56, and the lever rotation shaft 23a is moved in the normal rotation direction A. The tip 56a of the accelerator arm 56 becomes the arm tip of the volume arm 57
The volume shaft 54 is interlockingly rotated in the direction a in which the accelerator volume 53 is opened by pushing down the 57b.

The contact treatment position relationship between the accelerator arm 56 and the volume arm 57 is such that when the accelerator volume 53 exceeds the rotational position (the state of FIG. 9B) of the volume shaft 54 at which the accelerator volume 53 is fully opened, as shown in FIG. c) accelerator arm 56 as shown
Is set so that the contact with the arm tip 57b of the volume arm 57 is cut off. The position and shape of the elastic member 50 are determined so that the lower surface of the accelerator arm 56 contacts the elastic member 50 at the rotation position of the volume shaft 54 where the accelerator volume 53 is fully opened as shown in FIG. 9B. .

When the accelerator lever 23 is not operated, the accelerator lever 23 is moved to the lever spring 49 as shown in FIG.
Of the accelerator arm.
The tip 56a of 56 is the arm tip 57b of the volume arm 57
It is located a little away above. In this state, the accelerator volume 53 is closed, the voltage of the battery for the power supply is not applied to the electric motor for traveling, and the electric tricycle 1 is stopped.

The driver operates the lever operating shaft 23 of the accelerator lever 23.
b by hand, the lever rotation shaft 23a rotates in the normal rotation direction A.
, The accelerator arm 56 also rotates in the normal rotation direction A to rotate the volume arm 57 in the opening direction a, and the rotation of the volume arm 57 is transmitted to the volume shaft 54.
Accelerator volume according to the amount of rotation of the accelerator lever 23
53 is opened, and the electric tricycle 1 starts running and the vehicle speed increases.

When the accelerator volume 53 is fully opened, FIG.
Since the accelerator arm 56 contacts the elastic member 50 as shown in (b), the occupant can sense the fully opened position of the accelerator volume 53 via the accelerator lever 23.

When the occupant immediately pushes down the lever operation shaft 23b of the accelerator lever 23 excessively in an emergency, the accelerator volume 53 is fully opened temporarily, but immediately as shown in FIG. 9 (c). Since the contact between the accelerator arm 56 and the arm end portion 57b of the volume arm 57 is cut off, the rotation of the lever rotation shaft 23a is mechanically interrupted with respect to the volume shaft 54, and the volume shaft 54 becomes free. The volume shaft 54 rotates in the closing direction “b” of the accelerator volume 53 by the action of the spring 58, the voltage applied to the electric motor for traveling becomes zero, and the electric tricycle 1 stops.

Thereafter, when the occupant releases the accelerator lever 23, the accelerator lever 23 is acted upon by the action of the lever spring 49.
23 and the accelerator arm 56 try to return to their initial position,
As shown in FIG. 9D, the accelerator arm 56 again comes into contact with the arm tip 57b of the volume arm 57 from below to try to rotate the volume arm 57 in the closing direction b to close the accelerator volume 53.

At this time, since the accelerator volume 53 is already fully closed, the volume shaft 54 does not further rotate in the closing direction b, but the arm tip 57b is moved to the arm base 57a.
The arm tip 57b and the accelerator arm 56 can be rubbed against each other, and the accelerator lever 23 and the accelerator arm 56 can be initialized while the accelerator volume 53 is kept in the fully closed state. Is returned to the position.

As described above, according to the accelerator device 21A of the first embodiment and the accelerator device 21B of the second embodiment, the interlocking mechanisms 38, 55 are provided by the accelerator volumes 36, 53.
When the throttle lever exceeds the fully opened state, the rotation of the lever rotation shaft 23a of the accelerator lever 23 is mechanically cut off with respect to the accelerator volumes 36, 53 (volume shafts 37, 54), and the accelerator volumes 36, 53 are fully closed. Since it is configured to return, no electrical detection means such as sensors and limit switches, control means such as a microcomputer, and wiring are not required at all, thereby simplifying the configuration of the accelerator devices 21A and 21B. It can be very advantageous in terms of assemblability and manufacturing cost.

The accelerator devices 21A and 21B are provided with projections 32 and elastic members 33 and 50 as fully open position indicating means for allowing the occupant to sense the fully open positions of the accelerator volumes 36 and 53 via the accelerator lever 23. As a result, the occupant can easily detect the fully opened position of the accelerator volume, and cannot further hold the accelerator lever 23, so that the accelerator volumes 36 and 53 are unnecessarily returned to the fully closed state during normal driving. Can be prevented.

Further, these accelerator devices 21A, 21B
Has reliable operation because its interlocking mechanisms 38 and 55 are made up of very simple mechanical parts.
High reliability. In particular, since the volume shafts 37 and 54 of the accelerator volumes 36 and 53 are constantly urged in the closing direction b of the accelerator volumes 36 and 53 by the volume springs 42 and 58, the accelerator volumes 36 and 53 are emergency stop. The operability when the vehicle is returned to the fully closed state by the volume springs 42 and 58 is very good, and the electric tricycle 1 can be reliably stopped.

Even if moisture such as raindrops enter the inside of the control box 7, the accelerator devices 21A, 21B
Since there is almost no possibility of failure, the sealing structure and the like of the control box 7 can be simplified to reduce costs and reduce weight.

[0061]

As described above, the accelerator device for an electric vehicle according to the present invention includes an interlocking mechanism that interlocks in the direction of opening the accelerator volume in proportion to the operation amount of the accelerator lever beyond the fully open state of the accelerator volume. At this point, the accelerator volume is mechanically shut off from the accelerator volume at the time of the acceleration lever return and the accelerator volume is returned to the fully closed state, so the occupant immediately grips the accelerator lever strongly to the high-speed side in an emergency. Even if it gets stuck, the running of the electric vehicle can be stopped immediately. Since this interlocking mechanism operates mechanically,
No electrical detection means such as sensors and limit switches, no control means such as a microcomputer, and no wiring are required, which simplifies the configuration of the accelerator device and is advantageous in terms of assemblability and manufacturing costs.

Further, the accelerator device for an electric vehicle according to the present invention is provided with full-open position indicating means for allowing the occupant to sense the full-open position of the accelerator volume via the accelerator lever, so that the occupant can fully open the accelerator volume during normal traveling. It is possible to prevent the accelerator lever from being operated more than the position, and to prevent unnecessary return of the accelerator volume to the fully closed state during traveling.

Further, in the accelerator device for an electric vehicle according to the present invention, the interlocking mechanism includes an accelerator gear having a limited number of teeth and provided integrally with a lever rotation shaft of an accelerator lever, and a volume shaft of an accelerator volume. A volume gear provided and meshing with the accelerator gear, and a rotation direction limiting means provided between the volume shaft and the volume gear and configured to transmit only the rotation of the volume gear in the rotation direction for opening the accelerator volume to the volume shaft. And a volume shaft urging member for urging the volume shaft in the direction of rotation of the accelerator volume, and when the accelerator volume exceeds the rotation position of the volume shaft at which the accelerator volume is fully opened, the accelerator gear is engaged with the volume gear. Accelerator gear teeth and accelerator gear lever so that they do not engage Having set a fixed angle to the rotating shaft,
The accelerator device has a simple structure, does not easily cause a failure, and has high reliability.

In the accelerator device for an electric vehicle according to the present invention, the interlocking mechanism is provided so as to rotate integrally with an accelerator arm rotatably provided on a lever rotation shaft of an accelerator lever, and is provided integrally with a volume shaft of an accelerator volume. A volume arm that rotates the volume axis in the direction of rotation that opens the accelerator volume when the tip of the arm is pressed by the accelerator arm when the lever rotation axis rotates forward, and a volume axis that urges the volume axis in the direction of closing the accelerator volume The accelerator arm and the volume arm are configured to include a biasing member, so that contact between the accelerator arm and the arm tip of the volume arm is cut off when the accelerator volume exceeds the rotation position of the volume axis where the accelerator is fully opened. Set the contact treatment position relationship of Is provided with the over arm tip to be collapsed only in the direction of closing the accelerator volume with respect to the arm base, further structure prevents the occurrence of a failure in the simple and it is possible to provide a highly reliable acceleration device.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric tricycle, which is an example of an electric vehicle to which the present invention is applied, as viewed obliquely from the front right.

FIG. 2 is a perspective view of a handlebar and a control box.

FIG. 3 is a plan view of a control box.

FIG. 4 is a right side view of the control box.

FIG. 5 is a plan view showing a first embodiment of the accelerator device.

FIGS. 6A to 6D are views showing one embodiment of the present invention by a longitudinal section along the line VI-VI in FIG. 5, wherein FIGS. FIG. 6 is a diagram showing an operation state of each unit when the operation is performed.

FIG. 7 is a plan view showing a second embodiment of the accelerator device.

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 9 (a).

9 is a longitudinal sectional view taken along line IX-IX in FIG. 7, and (a) to (d).
FIG. 7 is a diagram illustrating an operation state of each unit when an accelerator lever is operated in the accelerator device according to the second embodiment.

[Explanation of symbols]

1 Electric tricycle 21A, 21B as an example of an electric vehicle Accelerator device 23 Accelerator lever 23a Lever rotating shaft 29, 49 Lever spring functioning as accelerator urging member 32 Projection functioning as fully open position indicating means 33, 50 As fully open position indicating means Functioning elastic members 36, 53 Accelerator volume 37, 54 Volume shaft 38, 55 Interlocking mechanism 39 Accelerator gear 40 Volume gear 41 One-way clutch 42, 58 functioning as rotation direction limiting means Volume spring functioning as a volume shaft urging member 56 Accelerator Arm 57 Volume arm 57a Arm base 57b Arm tip A Forward rotation direction of accelerator lever (lever rotation axis) B Reverse rotation direction of accelerator lever (lever rotation axis) a Opening direction that is the rotation direction in which accelerator volume opens b Close accelerator volume The direction of rotation is closed direction

Claims (4)

[Claims] 1. An accelerator lever 23 operated by an occupant, accelerator volumes 36 and 53 for varying the voltage applied to the electric motor for traveling, and a direction in which the accelerator volumes 36 and 53 are opened in proportion to the amount of operation of the accelerator lever 23. (Interlocking mechanisms 38 and 55 for interlocking with (opening direction a)
An accelerator device for an electric vehicle including an accelerator urging member (29, 49) for urging the accelerator lever 23 in a direction (closing direction b) in which the accelerator volume 53 is closed.
When the levers 36 and 53 exceed the fully opened state, the rotation of the lever rotation shaft 23a of the accelerator lever 23 is mechanically controlled by the accelerator volume 3
Accelerator volume 36,5 at the same time as shut off against 6,53
3. Accelerator devices 21A, 21B for an electric vehicle, wherein interlocking mechanisms 38, 55 are configured to return 3 to a fully closed state. 2. An accelerator device 21A for an electric vehicle according to claim 1, further comprising a full-open position indicating means (32, 33, 50) for allowing the occupant to sense the full-open position of the accelerator volumes 36, 53 via the accelerator lever 23. , 21B. 3. An accelerator gear provided with an interlocking mechanism 38 provided on an accelerator gear 39 having a limited number of teeth and integrally provided on a lever rotation shaft 23a of an accelerator lever 23 and a volume shaft 37 of an accelerator volume 36. Volume gear 40 meshing with 39, volume shaft 37 and volume gear 40
A rotation direction limiting means (41) provided between the rotation shaft and the rotation of the volume gear 40 in a rotation direction (opening direction a) for opening the accelerator volume 36 to the volume shaft 37; And a volume shaft urging member (42) for urging the accelerator volume 36 in the closing direction (closing direction b) of the accelerator volume 36, and when the accelerator volume 36 exceeds the rotational position of the volume shaft 37 at which the accelerator volume 36 is fully opened. The accelerator device (21A) for an electric vehicle according to claim 1, wherein the number of teeth of the accelerator gear (39) and a fixed angle of the accelerator gear (39) to the lever rotation shaft (23a) are set so that the accelerator gear (39) is disengaged from the volume gear (40). 4. An interlocking mechanism 55 is provided integrally with an accelerator arm 56 rotatably provided on a lever rotation shaft 23a of an accelerator lever 23 and a volume shaft 54 of an accelerator volume 53, and has an arm tip 57b. Is the lever rotation axis
The volume arm 57 that rotates the volume shaft 54 in the rotation direction (opening direction a) that is pressed by the accelerator arm 56 when the accelerator arm 56 rotates forward to open the accelerator volume 53, and the rotation direction (closed) that closes the volume shaft 54 to the accelerator volume 53 A volume shaft urging member (58) for urging in the direction b), and when the accelerator volume 53 exceeds the rotational position of the volume shaft 54 at which the volume is fully opened, the arm ends of the accelerator arm 56 and the volume arm 57 The contact treatment positional relationship between the accelerator arm 56 and the volume arm 57 is set so that the contact with the portion 57b is cut off, and the volume arm
The accelerator device (21A) for an electric vehicle according to claim 1, wherein the arm tip portion (57b) of the 57 is provided so as to be tilted only in a direction (closing direction b) of the accelerator volume (53) with respect to the arm base portion (57a).