JPS5814643Y2 - Accelerator device for electric cars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an accelerator device for an electric vehicle that operates an accelerator control means for controlling the speed of the electric vehicle when moving forward or backward.

A conventional accelerator device for electric vehicles of this type will be explained with reference to FIGS. 1 and 2.

Reference numeral 19 denotes a control lever, which moves the electric car forward when operated from the neutral point A in the direction of arrow A, and moves backward when operated in the direction of arrow A.

15 is a substrate, and 2.14 is a bearing 2 and a stopper 14 attached to the substrate 15.

13 is an E-type circlip that prevents the operating lever 19 from slipping out in the axial direction.

Reference numeral 6 denotes a rotary accelerator control means for controlling the speed of the electric vehicle when moving forward or backward, and is composed of, for example, a potentiometer.

Reference numeral 17 denotes a fan-shaped gear which is connected to the operating lever 19 with a pin 16 and rotates together with the operating lever 19; 18 is a gear that meshes with the sector-shaped gear 17; and 6a is connected to the gear 18 with a pin 20; This is the axis for operating the accelerator control means 6.

In addition, 10.12 is a small switch, generally called a micro switch, which electrically prompts the operation of an electromagnetic switch.
This short-circuits the chopper that supplies power from a battery or other power source to the electric motor, applies full voltage to the electric motor, and runs the electric car at maximum speed.

11 is an insulator for insulating the small switch 10.12, and 23 is a screw for attaching the small switch 10.12 and the insulator 11 to the board 15.

21.22 is a small switch 10 provided on the fan-shaped gear 17
．． 12 is a cam surface that opens and closes.

Next, the operation of the above conventional device will be explained.

First, when the operating lever 19 is operated in the direction of arrow A, the fan-shaped gear 17 and gear 18 fixed to the operating lever 19 rotate, and the gear 18 rotates clockwise, causing the rotary accelerator control means 6 to rotate.
is operated to rotate clockwise, the characteristic value of the control mechanism within the control means 6 changes, and the electric vehicle is accelerated in the forward direction.

By increasing the operation of the operating lever 19, the small switch 10 is closed, the chopper etc. are short-circuited, the full voltage is applied to the electric motor, and the electric car runs at maximum speed.

Furthermore, when the operating lever 19 is operated in the direction of the arrow, the gear 18 rotates to the left, the rotary accelerator control means 6 is operated to the left, the electric vehicle is similarly accelerated in the reverse direction, and the small switch 12 is closed. Electric cars run at maximum speed.

However, in the conventional accelerator device, the sector gear 17,
Since the gear 18 has a complicated structure and is large, a small switch 10 is used.
．． It is not suitable for fine adjustment of 12, and has the disadvantage of being difficult to assemble, requiring a large amount of adjustment man-hours, and increasing costs.

In addition, since the cam surfaces 21 and 22 of the sector gear 17 that opens and closes the small switch 10 and 12 are located in the same place as the gear surface, the shape of the cam is limited to some extent, making it unsuitable for downsizing. Ta.

Although it is an important part that affects safety, the cam surface and gear surface of the sector gear 17 have been subjected to complicated cutting processes, resulting in an unstable shape and uneven operating angles, reducing safety. There were drawbacks.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an inexpensive, safe, and compact accelerator device for electric vehicles.

The present invention will be described below with reference to an embodiment shown in the drawings.

In FIGS. 3 and 4, reference numeral 1 denotes a control lever, and when operated from the neutral point A in the direction of arrow A, the electric car moves forward, and when operated in the direction of arrow A, the electric car moves backward.

2 is a bearing into which a part of the operating lever that is integrated with the cam shaft is inserted.

Reference numeral 3 denotes a cam which is adjustable and fixed to the operating lever 1 with a nut 4 and a washer 5 and rotates following the operation of the operating lever 1, and has a groove (hereinafter referred to as cam groove) 3a.

3b is a cam surface which opens and closes a small switch 10.12, which serves as a small opening/closing means.

The rotary accelerator control means 6 is fixed to a base plate 15, and an arm 7 is attached to an input shaft 6a of the accelerator control means 6 with screws 9 so as to be adjustable.

A roller pin 8 that engages with the cam groove 3a of the cam 3 is attached to one end of the arm 7.

Although the central axis of rotation of the cam 3 is formed by the end portion 1a of the operating lever 1, a dedicated shaft may be provided and this shaft and the operating lever may be connected.

Next, the operation of the device of the present invention with the above configuration will be explained.

When the operating lever 1 is operated in the direction of arrow A, that is, in the forward direction of the electric vehicle, the cam 3 also rotates, and the cam groove 3a and roller pin 8 are rotated.
Due to this action, the arm 7 slides in the direction of arrow A, the characteristic value of the control mechanism within the accelerator control means 6 changes, and the electric vehicle is accelerated in the forward direction.

As the operation of the operating lever 1 is increased, generally when the operating angle reaches about 80%, the small switch 10 closes, electrically closing an electromagnetic switch (not shown), and disconnecting the power source from a battery or the like. The chopper (not shown) that supplies power to the electric motor is short-circuited, and full voltage is applied to the electric motor, causing the electric car to run at maximum speed.

Furthermore, when the operating lever 1 is operated in the direction of the arrow, that is, in the backward direction of the electric vehicle, the arm 7 slides in the two directions of the arrow by the action of the cam groove 3a and the roller pin 8, and the control mechanism in the accelerator control means 6 is activated. The characteristic value changes, the electric car is accelerated in the backward direction, the small switch 12 is closed, and the electric car runs at maximum speed.

Therefore, by providing the cam groove 3a in the thin plate cam 3, the structure for operating the accelerator control means 6 becomes simple and inexpensive.

Further, even after the cam 3 is assembled, the cam groove 3a can be used as a hole for adjusting the shaft 6a of the accelerator control means 6 with a screwdriver or the like.

Further, by providing cam surfaces 24 and 25 of the cam 3 as shown in FIGS. 5 and 6, the operation of a plurality of small switches can be controlled.

As described above, in the present invention, the cam 3 having the linear groove 3a is made of a thin plate, and the pin 8 of the arm 7 is positioned within the groove 3a of the cam 3, so that the pin 8 of the arm 7 is interlocked with the rotation of the cam 3. The rotation of the arm 7 controls the rotary accelerator control means 6, and since the rotary accelerator control means 6 is positioned between the shaft 1a and the cam surface of the cam 3, the rotary accelerator control means is located directly below the cam 3. In addition, since it is placed in a position covered by the cam 3, a dedicated planar space for the rotary accelerator control means is not required, and the structure can be made compact.

Further, the arm 7 can also be small and inexpensive.

In addition, since the cam is a thin plate, it is suitable for mass production, and since parts management is easy, product prices can be reduced, and machining accuracy, which has often been a problem in the past, is not a problem.Therefore, it is suitable for electric vehicles. This has the excellent effect of stabilizing the operation timing of the accelerator operating device and improving operational safety.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and a side view of a conventional device;
3 and 4 are a plan view and a side view showing one embodiment of the device of the present invention, and FIGS. 5 and 6 are a plan view and a side view showing another embodiment of the cam in the device of the present invention. . 1...Operating lever, 1a...Shaft, 3.
...Cam, 3a...Groove, 3b...
・Cam surface, 6...Rotary accelerator control means, 6
a...Input shaft, 7...Arm, 8...
...Roller pin, 10.12...Small opening/closing means, 15...Substrate.

Claims (1)

[Scope of utility model registration request] A small opening/closing means 10.12 provided on the substrate and a cam surface provided on the small opening/closing means 10.12 that rotates left and right around the shaft 1a to turn on and off the small opening/closing means 10.12, and a linear groove 3a.
A cam 3 made of a thin plate having a cam 3, an operating lever 1 connected to or integrated with the shaft 1a of the cam 3, and an arm 7 having a pin 8 located in a groove of the cam 3 at its tip. The rotation of the electric vehicle causes its own input shaft to rotate, thereby controlling the speed of the electric vehicle during forward and backward movement. The input shaft rotation angle of the rotary accelerator control means 6 is controlled according to the amount of operation of the operating lever 1, and the small opening/closing means 10.12 is operated by displacement of the operating lever 1 by a predetermined amount or more. Accelerator device for electric cars.