JPS5837722Y2 - Car parking brake device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automobile parking brake device with improved operability.

Traditionally, parking handbrakes have been put into practical use, such as stick-type ones and lever-type ones installed on the side of the driver's seat, but these handbrakes are generally located on the driver's left hand side. There is nothing more than a □ light switch placed on the dash board around it to turn on the parking lamp.

Therefore, when a power assist device is attached to the handbrake to assist its operating force, it is difficult to use the above limit switch as a switch to turn on and off the power assist device, and it is difficult to use a separate limit switch. However, in any case, it is necessary to separately operate the switch of the power assist device and operate the handbrake lever, resulting in a problem that the operations become cumbersome.

This idea was made in view of the above-mentioned conventional problems, and is a power assist device equipped with a fluid actuator that assists the operating force of the brake lever and an electromagnetic switching valve that controls the fluid supplied to the actuator. for,
The grip part of the brake lever has a first valve that is activated in conjunction with the gripping action of the lever when the brake is operated, and that excites the electromagnetic switching valve.
The switch and a second switch, which operates in conjunction with the ratchet release push button at the tip of the lever to demagnetize the electromagnetic switching valve when the brake is released, are provided directly to improve the operability of the handbrake lever. be.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, in the parking brake device having a lever-type brake lever 37 (see FIG. 3), when the brake lever 37 is pulled up, the brake shoe 4. In this structure, the brake shoe 4.4 is opened and operated, and the brake shoe 4.4 is closed via the guide lever 3 by a brake release operation of pushing down the brake lever 3T.

The power assist device 5 includes a hydraulic actuator 7 that connects a piston rod 6 to the guide lever 3 to assist the operating force of the brake lever 37, and an electromagnetic switch that controls fluid supplied to the actuator 7 from a fluid supply source 8. A valve 9 is provided.

When the electromagnetic switching valve 9 is energized, fluid from the fluid supply source 8 is supplied to one working chamber 7a of the actuator 7 through the electromagnetic switching valve 9 and the throttle valve 10 to move the piston 11 forward. The guide lever 3 is swung in the direction of opening of the brake shoe 4.4.

Also, when demagnetizing the electromagnetic switching valve 9, the working chamber 7a is closed to the throttle valve 1.
0. A return spring for the brake lever 37 that is open to the atmosphere via the electromagnetic switching valve 9 and acts on the guide lever 3 (not shown).

) Alternatively, the return spring 12' provided in the other working chamber 7b of the actuator 7 causes the piston 11 to move back and swing the guide lever 3 in the direction of the closing operation of the brake shoe 4.4.

A key switch 14, a normally open first switch 15, and a normally closed second switch 16 are connected in series between the solenoid 13 of the electromagnetic switching valve 9 and the battery B.

Therefore, unless all the switches 14, 15, and 16 are in the on position, the solenoid 13, that is, the electromagnetic switching valve 9 will not be energized.

In order to assemble the first switch 15 and the second switch 16 into the band brake lever 37 provided on the side of the driver's seat, as shown in FIG. A notch 40 is provided at the bottom of the notch 40, and a one-sided contact piece 42 is attached to the bottom of the notch 40 via an insulating cover 41, and the same outer diameter as the grip part 39 is formed opposite to the one-sided contact piece 42. movable insulating cover 43
The other side contact piece 44 having a contact small protrusion is attached to the inner surface of the switch, and a return spring 45 is interposed between both insulating covers 41 and 43 to constitute the first switch 15.
When gripped with the hand, the first switch 15 is turned on via the movable insulating cover 43, and when the grip part 39 is released, the first switch 15 is turned off.

In addition, an insulating ring 49 is fitted onto the shaft 48 of the ratchet release button 47 having the return spring 46, and the second switch 16 is disposed within the lever 37 opposite to the insulating ring 49. When the insulating ring 49 is pressed down with a finger against the spring 46,
kicks the second switch 16 to turn it on, and when the ratchet release button 47 is released, the insulating ring 49 is separated from the second switch 16 and turned off.

Therefore, when the driver grasps the movable insulating cover 43 together with the grip part 39 of the lever 37, the first switch 15 is turned on, the electromagnetic switching valve 9 is energized, and in this state, the lever 3
7 is pulled upward, fluid is supplied to one working chamber 7a of the actuator 7, the piston 11 is moved forward, and the equalizing lever is swung in the direction of opening of the brake shoe 4.4, so the lever 37 is pulled up. Brakes can be operated easily.

After that, when you release your hand from the grip part 39, the first switch 15
is turned off, the solenoid switching valve 9 is demagnetized, and the actuator 7 is turned off.
The working chamber 7a is opened to the atmosphere.

In this state, the band brake lever 37 is locked at the brake operating position by a ratchet mechanism (not shown).

Next, when the driver grips the lever 37 again and presses the ratchet release button 47 with his finger, the second switch 16 is turned off by the insulating ring 411 of the shaft 48, and the driver grips the movable insulating cover 43 and turns off the first switch 15. Even if it is turned on, the electromagnetic switching valve 9 remains demagnetized, so release the lock by the ratchet mechanism,
When lever 37 is pushed down, the equalizing lever
While discharging the fluid in the working chamber 7a of the actuator 7 to the atmosphere, the piston 11 is moved back and at the same time the J brake is operated.
4, 4 are closed, the brake release operation of pushing down the lever 37 can be performed easily.

As is clear from the above explanation, this invention enables the first and second switches that control the power assist device (hydraulic actuator, electromagnetic switching valve) that assists the operating force of the automobile brake bundle to Since it is provided on the lever, each switch can be turned on and off at the same time as the brake lever is operated for braking and releasing the brake, resulting in a marked improvement in operability.

In addition, since the switch configuration can be configured so that the normal operation of the brake lever can be used as is, there are no important mistakes or strange sensations caused by the switch.

Additionally, if you use the wiring structure for the brake lever switch, you can easily attach a brake lever night indicator lamp, etc.

[Brief explanation of drawings]

FIG. 1 is a side view of a parking brake device for an automobile, FIG. 2 is a system diagram of a power assist device, and FIG. 3 is a longitudinal sectional view of a lever-type brake lever provided on the side of a driver's seat. 3...Guide lever, 4...Crack shoe, 5...Power assist device, 7...
...Fluid actuator, 9...Solenoid switching valve,
15... 1st switch, 16... 2nd switch
Switch, 37... Brake lever 39...
...Gripping part, 43...Movable insulating cover 47
...Ratchet release button.

Claims (1)

[Scope of utility model registration request] In conjunction with the operation of the parking brake lever installed on the side of the driver's seat, the brake is applied mechanically while controlling the supply and discharge of fluid from a fluid actuator that assists the lever operation force by energizing and demagnetizing the electromagnetic switching valve. In the parking brake device configured to be actuated, a first switch is provided on the gripping portion of the lever, the first switch being actuated in conjunction with the gripping action of the lever, and capable of energizing the electromagnetic switching valve and supplying fluid to the actuator; A parking brake device for an automobile, characterized in that a second switch is provided, which operates in conjunction with a ratchet release push button at the tip of the lever, and can demagnetize the electromagnetic switching valve and discharge fluid from the actuator.