JPH086655Y2 - Parking brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a parking brake device that reduces the operating force of a parking brake by the driving force of an actuator.

[Prior Art] Conventionally, there was a parking brake device that reduces the operating force of the operation lever by operating the actuator in conjunction with the manual operation of the brake operation lever of the stick type or the like. For the purpose of improvement, a parking brake device has been developed in which the actuator is actuated and braked simply by instructing with a push button switch etc. without operating the operation lever (Japanese Utility Model Application No. 63-9274).
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[Problems to be Solved by the Invention] However, in such a conventional parking brake device, uniform braking is performed by a switch operation, and control for exerting a braking force according to a use condition is performed. Absent.

Therefore, even if the usage conditions are different, such as on a flat road, a gentle slope, or a steep slope, the brakes are always applied with a uniform braking force, which causes a problem in safety and discomfort in operation. there were.

The present invention has been made in view of such a problem, and an object thereof is to provide a parking brake device that reduces an operating force of an operator and exerts a braking force according to a use situation.

[Means for Solving the Problem] In order to achieve such an object, the present invention provides a switch device having a switch for designating a plurality of braking modes,
A control circuit that exerts a braking force specified in the parking brake unit by controlling the operation of the actuator according to the braking mode specified by the switch device, and the operator operates the switch device, An appropriate braking force can be obtained according to the road surface condition and the like.

Further, in the case of a parking brake device that controls the braking force of the parking brake unit by winding a cable that controls the parking brake unit with an actuator, if the braking mode is specified by a switch device that can specify a plurality of braking modes, According to the braking mode, the parking brake unit is activated by activating the actuator and stopping the operation of the actuator by detecting that the cable has reached a predetermined pulling force or stroke corresponding to each control mode. It was decided to provide a control circuit that maintains the braking force.

[Operation] According to the parking brake device having such a configuration, it is possible to apply the parking brake with a braking force according to various situations such as a flat road or a slope by simply operating the switch device. It is possible to improve security and safety.

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

First, the structure will be described with reference to FIG. 1. Reference numeral 1 is a power assist type parking brake mechanism, in which an actuate lever 2 is connected to a brake unit 4 via a cable 3 and an assist lever 5 is connected via a cable 6. Connected to the actuator 7.

A detection sensor 8 detects a pulling force or a stroke of the cable 6, and supplies a detection signal S1 to the control circuit 9.

The control circuit 9 is a switch device including a plurality of push button switches 10a to 10e for setting a plurality of braking modes.
The signal S2 from 10 is received, and the actuator 7 is instructed to perform the winding operation of the cable 6 corresponding to the designated control mode.

In the parking brake device having such a configuration,
First, when the operation lever 1a provided in the parking brake mechanism 1 is pulled toward the braking side, the actuator 7 follows the operation stroke of the operation lever 1a and winds the cable 6, and follows the winding operation to assist the operation. The lever 5 and the actuate lever 2 pull the cable 3 to cause the brake unit 4 to perform a braking operation.

Further, when the appropriate braking mode setting button of the switch device 10 is pressed while the parking brake mechanism 1 is not braking, the control circuit 9 instructs the actuator 7 to wind the cable 6 and the assist lever 5 And pulling the cable 3 via the actuate lever 2 causes the brake unit 4 to perform a braking operation,
When the pulling force or stroke of the cable 6 reaches a predetermined value specified in the braking mode, the control circuit 9 causes the actuator 7 to stop the winding operation based on the detection signal S1 from the sensor 8. That is, the switches of the switch device 10 are, for example, 10a for braking on a flat road, 10b for braking on a gentle slope, 10c for braking on a moderate slope, and 10d.
Is determined for braking on a steep slope and 10e for releasing the braking. The braking circuit 9 controls the pulling force or stroke of the cable 6 from the control signal S2 and the detection sensor 8 designated by those switches. By controlling the driving and stopping of the actuator 7 by comparing and judging the detection signal S1 of 1, the specified braking force is exerted on the brake unit 4.

Thus, according to this embodiment, the operation lever provided in the conventional power assist type parking brake mechanism is
Braking can be performed by 1a, and a proper braking force can be designated by designating an appropriate switch of the switch device 10 while observing road surface conditions and the like. As a result, the desired braking force can be obtained by operating the switch device 10 in the same manner as the conventional braking force according to the operation stroke of the brake operating lever can be obtained, so that the operability and the safety are improved. be able to.

It should be noted that in this embodiment, the case where the push button type switch device 10 is applied has been described, but the present invention is not limited to this.
For example, as shown in FIG. 2, a rotary switch for rotating the switching lever 11 and setting a plurality of types of mode switching may be used.

[Effects of the Invention] As described above, according to the present invention, the parking brake can be applied with a braking force according to various situations such as a flat road or a hill by simply operating the switch device. It is possible to improve security and safety.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of an embodiment of a parking brake device according to the present invention, and FIG. 2 is a structural explanatory view showing another embodiment of a switching device for mode switching. Reference numeral in the figure: 1; parking brake mechanism 1a; brake operating lever 2; actuate lever 3,6; cable 4; brake unit 5; assist lever 7; actuator 8; detection sensor 9; control circuit 10, 11; switch device .

Claims (2)

[Scope of utility model registration request] 1. A parking brake device for controlling a braking force of a parking brake unit by a driving force of an actuator, comprising: a switch device having a switch for designating a plurality of braking modes; and a braking mode designated by the switch device. A parking brake device comprising: a control circuit that exerts a braking force specified by a parking brake unit by controlling the operation of the actuator. 2. A parking brake device for controlling a braking force of a parking brake unit by winding a cable for controlling the parking brake unit with an actuator, the switch device having a switch for designating a plurality of braking modes, and the switch. When the detection sensor detects that the cable has reached a predetermined pulling force or stroke corresponding to each control mode by activating the actuator according to the braking mode specified by the device, the actuator operation is stopped and parking is performed. A parking brake device, comprising: a control circuit for maintaining a braking force by a brake unit.