JP2550072Y2 - Accelerator switch device for special vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator switch device for a special vehicle, such as a forklift, having a function of moving a special vehicle forward and backward by rotating a control lever. More specifically, a rotor that rotates together with the operation lever and has a cam portion and a tooth portion,
The present invention relates to an accelerator switch device for a special vehicle having a pole plate provided with a movable contact piece and a fixed contact piece operated by the rotor.
The special vehicle is, for example, a low-speed traveling vehicle such as a forklift, a work vehicle in a factory, a vehicle for transporting construction personnel, and an amusement vehicle.

[0002]

2. Description of the Related Art Conventionally, as a technique for operating a switch piece by a cam, for example, Japanese Utility Model Publication No.
There is a technique disclosed in Japanese Patent Publication No. 78-78. The cam is rotated by a gear to move the contact piece into and out of contact. The cam and the gear are mounted on the main shaft.

[0003] The pole boards of the switches S1, S2 and S3 are:
The shapes are different from each other. Then, the switch S1,
In S2 and S3, contact pieces having different shapes are insert-molded. The pole boards of the switches S1, S2, and S3 are stacked in three stages.

[0004]

In the above-mentioned prior art, the cam, the gear, and the main shaft are formed of different members. For this reason, the number of parts is large, which has caused an increase in cost.

The pole plates of the switches S1, S2, and S3 have different shapes. For this reason, there are many types of pole plates, the management of the mold is complicated, and the cost of the mold is increased.

[0006]

An accelerator switch for a special vehicle according to the present invention moves a special vehicle forward by turning operation.
An operation lever for retreating and a new operation lever
A return spring that returns to the neutral position, and a projection that rotates together with the operation lever and presses against both ends of the return spring.
The fixed flange , the meshing teeth meshing with other gears, and the movable contact piece are fixed.
Keep the large diameter part and movable contact piece in contact with the fixed contact piece in the OFF state.
A small diameter portion to be held, and a shape between the large diameter portion and the small diameter portion.
A rotor which is integrally formed with the cam portion, a having a curved portion which forms a movable contact piece which is pressed against the cam portion, a stationary contact piece which contacts the movable Dose' piece, the movable contact piece and fixed contact piece Yes
And the sliding contact piece meshed with the toothed portion of the rotor
And a base for an accelerator with which the sliding contact piece comes into contact.
It consists of a board and

Further, in the accelerator switch device for a special vehicle according to the present invention, the movable contact piece is provided on a cam portion of the rotor.
A bobbin-shaped sliding body to be pressed against is disposed at the tip,
However, the same shape of the pole plates was
You.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the accelerator switch device for a special vehicle according to the present invention will be described in detail with reference to FIGS. 1, 2, 3, 4 and 5. FIG.

Reference numeral 1 denotes an operation lever of an accelerator switch mounted on a special vehicle. The operation lever is fixed to the shaft 2 a of the rotor 2. The operation lever 1 rotates in the directions indicated by the arrows F and R about the shaft 2a.
Automatically returns to the N position. The rotation range of the operation lever 1 is regulated by stoppers 4 a and 4 b protruding from the case 4. When the operation lever 1 is turned in the direction of arrow F, the special vehicle moves forward, and the forward vehicle speed increases according to the turning angle. When the operation lever is turned in the direction of arrow R, the special vehicle moves backward, and the retreat speed increases according to the turning angle. The rotor 2 has a shaft 2 a fixed to the operation lever 1 via a bearing 4 c of the case 4. The rotor 2 integrally forms a shaft 2a, a flange 2b, a tooth 2c, and a cam 2d. The flange 2b is a disk-shaped member formed at the center of the rotor 2. The toothed portion 2c of the rotor 2 meshed with the gear 5 is formed on the flange 2b. The flange 2b has a projection 6 inserted between both ends 3a and 3b of the return spring 3. The cam portion 2d is, as shown in FIG.
The small diameter portion 2e, the large diameter portion 2f, the small diameter portion and the small diameter
A cylindrical body having a curved portion 2g formed between
You. The said cam portion 2d, variable dynamic contact piece 8, 9, 10, and 1
The sliding bodies 13, 14, 15, and 16 provided at the front end of one are in pressure contact. The operating lever 1 is in the neutral position
(N), as shown in FIG.
4, 15, and 16 are in pressure contact with the curved portion 2g. The
When the operation lever 1 is in a position where the operation lever 1 is turned in the direction of arrow F,
The cam portion 2d rotates in the direction of arrow A, and
And 14 are pressed against the large diameter portion 2f to fix the movable contact pieces 8 and 9
The contact pieces 17 and 18 come into contact with each other, and the sliding bodies 15 and 16 have a small diameter.
It presses against the part 2e. The operation lever 1 rotates in the direction of arrow R
When in the operated position, the cam portion 2d moves in the direction of arrow B.
The sliding members 15 and 16 rotate and press against the large diameter portion 2f.
The moving contact pieces 10 and 11 contact the fixed contact pieces 19 and 20,
The sliding members 13 and 14 are pressed against the small diameter portion 2e. The return spring 3 is formed of a torsion coil spring. The return spring 3 is inserted between a cylindrical portion 4d and a cylindrical portion 4e formed around the bearing 4c. The return spring 3 has ends 3a and 3b protruding from a notch 4f formed in the cylindrical portion 4e to the outside of the cylindrical portion 4e. Between the end 3a and the end 3b, a contact portion 4g protruding from the case 4 and a projection 6
Intervening. The gear 5 has a sliding contact piece 7 fixed to the lower surface. The sliding contact piece 7 is in pressure contact with an accelerator resistor (not shown) of the substrate 12. Movable contact pieces 8, 9, 10,
And 11 have bobbin-shaped sliding bodies 13, 14, 15, 16 which are pressed against the cam portion 2 d. Movable contact pieces 8 and 9
When the rotor 2 rotates in the direction of arrow A, it is pressed by the cam portion 2d and comes into contact with the fixed contact pieces 17, 18. When the rotor rotates in the direction of arrow B, the movable contact pieces 10 and 11 are pressed by the cam portion 2d and come into contact with the fixed contact pieces 19 and 20. The pole plate 21 includes the movable contact pieces 8 and 10 and the fixed contact piece 1.
7 and 19 are insert-molded. In the pole plate 22, the movable contact pieces 9 and 11 and the fixed contact pieces 18 and 20 are insert-molded. The pole board 21 is the same member as the pole board 22. The pole board 21 is laid on the case 4 via the pole board 22. Reference numeral 23 denotes a lid member, which is screwed to the case 4.

The accelerator switch device for a special vehicle according to the present invention is configured as described above, and the assembling procedure will be described in detail below. The return spring 3 is inserted between the cylindrical portions 4d and 4e.
The ends 3a and 3b are protruded from the notch 4f to the outside of the cylindrical portion 4e, and the ends 3a and 3b are brought into contact with the contact portion 4g. The shaft 2a of the rotor 2 is inserted into the bearing 4c. The operation lever 1 is screwed to the shaft 2a. The rotor 2
The shaft portion 2a, the flange portion 2b, the tooth portion 2c, and the cam portion 2d are integrally formed. Therefore, the rotor 2 can reduce the number of parts and the number of assembling steps. Then, the configuration of the rotor 2 is simplified. A protrusion 6 is provided on the flange 2b. The tip of the projection 6 is inserted between the ends 3a and 3b. The pole plate 22 in which the movable contact pieces 9 and 11 and the fixed contact pieces 18 and 20 are insert-molded is arranged in the case 4. At this time, the sliding members 14 and 16 are pressed against the cam portion 2d. The pole plate 21 in which the movable contact pieces 8 and 10 and the fixed contact pieces 17 and 19 are insert-molded is placed on the pole plate 22 and screwed to the case 4. The pole board 21 and the pole board 22 are the same. The pole plates 21 and 22 can simplify die management, reduce the types of pole plates, and reduce die costs. Next, the gear 5 having the sliding contact piece 7 is rotatably supported on the substrate 12. The gear 5 is meshed with the teeth 2 c of the rotor 2. The substrate 12 is fixed to the case 4. Movable contact pieces 8, 9, 10,
The cord 24 is soldered to the fixing contacts 17, 18, 19, and 20, the sliding contact 7, and the substrate 12.
Then, the assembly is completed by screwing the lid member 23 to the case 4.

Next, the operation of the present invention will be described in detail. When the operation lever 1 is not operated, it is in the state shown in FIGS. 1, 2, 3, 4, and 5. The return spring 3 is in contact with the contact portion 4g between both ends 3a and 3b. The rotor 2 is stationary because the protrusion 6 is inserted between both ends 3a and 3b. The operation lever 1 is at the neutral position (N) by the return spring 3. The movable contact pieces 8, 9, 10, and 11 are fixed contact pieces 17, 18, 1,
No contact with 9 and 20. Special vehicles are stationary.

When moving the special vehicle forward, the operation lever 1 is rotated in the direction of arrow F. The rotor 2 rotates together with the operation lever 1 in the direction of arrow B. Sliding bodies 13 and 14
Is pressed by the cam portion 2d. Then, the movable contact pieces 8 and 9 to which the sliding bodies 13 and 14 are fixed come into contact with the fixed contact pieces 17 and 18. This causes the special vehicle to move forward. The protrusion 6 installed on the rotor 2 is provided at the end 3 a of the return spring 3.
Press. The tooth portion 2c rotates the gear 5 in the direction of arrow D. The sliding contact piece 7 rotates together with the gear 5. The sliding contact piece 7 slides on the resistor. The speed of the special vehicle is
It increases in proportion to the rotation angle at which the sliding contact piece 7 rotates in the direction of arrow D. The special vehicle moves forward when the operation bar 1 is swung in the direction of arrow F. The forward speed of the special vehicle increases in accordance with the rotation angle of the operation lever 1 in the direction of arrow F.

When the operating lever 1 is released, the rotor 2
When the projection 6 is pushed back to the end 3 a of the return spring 3, it rotates in the direction of arrow A and returns to the original position. The return spring 3 is restored and the end 3a abuts against the contact portion 4g. The gear 5 and the sliding contact 7 return to the original position together with the rotor 2. The operation lever 1 returns to the neutral position (N). The special vehicle slows down and stops.

To move the special vehicle backward, the operation lever 1 is rotated in the direction of arrow R. The rotor 2 rotates together with the operation lever 1 in the direction of arrow A. Sliding bodies 15 and 16
Is pressed by the cam portion 2d. Then, the movable contact pieces 10 and 11 come into contact with the fixed contact pieces 19 and 20. As a result, the special vehicle moves backward. The protrusion 6 installed on the rotor 2
Presses the end 3 b of the return spring 3. The tooth portion 2c is
The gear 5 is rotated in the direction of arrow C. The sliding contact piece 7 rotates together with the gear 5. The sliding contact piece 7 slides on the resistor. The speed of the special vehicle increases in proportion to the rotation angle at which the sliding contact piece 7 rotates in the direction of arrow C. The special vehicle moves backward when the operation lever 1 is rotated in the direction of arrow R. And
The special vehicle increases the retreat speed according to the rotation angle of the operation lever 1 in the direction of the arrow R.

When the operating lever 1 is released, the rotor 2
When the projection 6 is pushed back to the end 3b of the return spring 3, the projection 6 rotates in the direction of arrow B and returns to the original position. The return spring 3 is restored, and the end 3b abuts against the contact portion 4g.
The gear 5 and the sliding contact 7 return to the original position together with the rotor 2. The operation lever 1 returns to the neutral position (N). The special vehicle slows down and stops.

[0016]

The present invention is configured as described above, and has the following effects. According to the first aspect, the rotor has a projection on which both ends of the return spring are pressed.
A flange portion, a噛歯portion meshing with other gears, the movable contact piece fixed
Large diameter part to be in contact with contact piece, movable contact piece kept in OFF state
A small diameter portion to be formed, and formed between the large diameter portion and the small diameter portion.
A cam portion having the curved portion, since the integrally formed,
Acceleration for special vehicles by reducing the number of parts and assembly man-hours
The structure of the switch device can be simplified. Claim 2
, The movable contact piece is pressed against the cam portion of the rotor.
With the bobbin-shaped sliding body at the tip,
And the pole plate has the same shape as the pole.
Prevent erroneous assembly of pole board by stacking boards in multiple stages
In addition, the cost of the mold and the types of parts can be reduced, and the mold management can be simplified.

[Brief description of the drawings]

FIG. 1 is a front view.

FIG. 2 is a sectional view taken along line XX of FIG. 1;

FIG. 3 is an enlarged rear view of a case in which an operation lever and a lid member are detached.

FIG. 4 is a sectional view taken along line YY in FIG. 3;

FIG. 5 is an enlarged exploded perspective view of a pole plate and a rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operating lever 2 Rotor 2a Shaft part 2b Flange part 2c Mesh part 2d Cam part 4 Case 5 Gear 8, 9, 10, 11 Movable contact piece 17, 18, 19, 20 Fixed contact piece 21, 22 Pole plate

Claims (2)

(57) [Scope of request for utility model registration] 1. A special vehicle is moved forward and backward by a turning operation.
Operating lever for returning the operating lever to a neutral position
And the operating lever rotates together with the operation lever , and both ends of the return spring are compressed.
A flange having a contacting projection, and a meshing portion meshing with another gear
And a large-diameter part that makes the movable contact piece contact the fixed contact piece,
A small-diameter part for maintaining the OFF state, and the large-diameter part and the
A rotor which is integrally formed with the cam portion, a having a curved portion formed between the small diameter portion, and the movable contact piece which is pressed against the cam portion, a stationary contact piece which contacts the movable Dose' piece, the movable contact A pole plate having a piece and a fixed contact piece, and the tooth having a sliding contact piece meshed with the tooth portion of the rotor.
An accelerator switch device for a special vehicle , comprising a vehicle and an accelerator substrate with which the sliding contact piece comes into contact . 2. The movable contact piece is provided on a cam portion of the rotor.
2. The accelerator switch device for a special vehicle according to claim 1 , wherein a bobbin-shaped sliding body to be pressed against is disposed at a tip end, and the pole plates are formed by overlapping the pole plates of the same shape in a plurality of stages.