JPH0645404Y2 - Parking brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a parking brake device capable of operating a parking brake with both an operating lever and an operating switch.

[Prior Art] As a conventional parking brake, for example, one using an actuator to actuate the parking brake with an operation lever and reduce the operation force of the operation lever is known. The advantage of this parking brake is that it is only necessary to lightly pull the operating lever by power assist from the actuator.

On the other hand, it is also known to operate an actuator by operating an operation switch to operate a parking brake.

The advantage of this parking brake is that the operation of the operation lever is not required and the operation and release of the parking brake can be easily performed only by operating the switch.

[Problems to be Solved by the Invention] However, such a conventional parking brake has a problem that the operation becomes complicated because the operation lever needs to be operated in the former case.

On the other hand, in the latter case, the lever operation is not necessary, but it is difficult to operate because there is no familiar lever, and some people prefer lever operation. In particular, in the case of a manual transmission vehicle, it is preferable to operate the lever to start on a slope.

As described above, there is no parking brake that can be operated by both the operation lever and the operation switch.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a parking brake device capable of operating and releasing the parking brake by both of the operation lever and the operation switch. .

[Means for Solving the Problems] In order to achieve the above object, the present invention provides an operation lever,
An actuator, and a balance lever on which an operating force of the operating lever acts on one end and an operating force of the actuator acts on the other end, and a braking force acts on an intermediate portion,
Operation switches for actuation and release, relative position displacement detection means for detecting relative position displacement of the operation lever and actuator, braking force detection means for detecting braking force, output of the operation switch, relative position displacement And control means for controlling the actuator based on the output of the detection means and the output of the braking force detection means.

[Operation] In the present invention, the actuator can be operated by operating the operation lever, and the power brake can operate and release the parking brake.

In addition, the parking brake can be operated and released by operating the actuator by operating the operation switch without operating the operation lever. That is, it is possible to realize a parking brake device capable of operating both the operating lever and the operating switch.

Further, in the case of operating the operation switch, the parking brake can be automatically released by depressing the accelerator pedal.

[Embodiment] An embodiment of the present invention will be described below based on the ground.

1 to 4 are views showing an embodiment of the present invention.

First, the configuration will be described. In FIG. 1, 1 is a brake pedal, 2 is a brake detection switch for detecting an operation of the brake pedal 1, and a detection signal of the brake detection switch 2 is input to a control circuit 3 which is a control means. To do. 4 is an accelerator pedal, 5 is an accelerator detection switch for detecting the operation of the accelerator pedal 4, and the accelerator detection switch 5
The detection signal of is input to the control circuit 3.

Reference numeral 6 is an operating switch, and 7 is a releasing switch. The outputs of these operating switches 6 and 7 are input to the control circuit 3, respectively. Reference numeral 8 is a battery, and the battery 8 supplies electric power to the control circuit 3.

Reference numeral 9 is an operation lever, and the operation lever 9 applies a parking brake force to a brake unit (not shown) of the rear wheels 10A and 10B. Reference numeral 11 denotes an actuator controlled by the control circuit 3, and the actuator 11 has a speed reducer 12 and an electric motor 13. The actuator 11 power-assists the operation lever 9 and applies parking brake force to the brake unit by operating the operation switches 6 and 7.

Next, as shown in FIG. 2, the operating force of the operating lever 9 acts on one end of the balance lever 14, the operating force of the actuator 11 acts on the other end of the balance lever 14, and the intermediate portion of the balance lever 14 acts. The parking brake force is applied. The balance lever 14 is connected to the equalizer 16 via the connecting mechanism 15, and the connecting mechanism 15 includes the connecting member 17 on the balance lever 14 side and the connecting member on the equalizer 16 side.
18, a cylindrical member 19 fixed to the connecting member 17 with a small gap in the large diameter portion 18A of the connecting member 18, and a spring 20 interposed between the cylindrical member 19 and the large diameter portion 18A. , Cylindrical member 19
Relative position displacement detection switch which is a brake force detection switch 21 for detecting a braking force for preventing creep and a relative position displacement detection unit for detecting relative position displacement between the operating lever 9 and the actuator 11. 22 and 23.

The braking force detection switch 21 detects the braking force by the movement of the cylindrical member 19 caused by the movement of the connecting member 17, and the relative position displacement detection switch 22 on the other hand is caused by the tilt of the balance lever 14 caused by the operation of the operation lever 9 and the operation lever 9 and the actuator.
The relative position displacement detection switch 23 detects the relative position displacement of the operating lever 9 and the actuator 11 by the inclination of the balance lever 10 caused by the operating force of the actuator 11. Relative position displacement detection switch 2
The outputs of 2, 23 and the braking force detection switch 21 are input to the control circuit 3, and the control circuit 3 detects the relative position displacement detection switch.
22,23, brake force detection switch 21, operation switch 6,7,
Accelerator detection switch 5 and brake detection switch 2
The actuator 11 is controlled based on each output of the. Reference numeral 24 is a bracket member for fixing the sheath of the cable to the vehicle body.

Next, the control circuit 3 will be described with reference to FIG.

In FIG. 4, 31 is a normally open contact of the ignition relay,
6 is an operation operation switch, 2 is a brake detection switch, 21
Brake force detection switches 21 and 32 are first relays for creep prevention operation. 33, 34 and 35 are the normally open contacts of the first relay 32, 33 is for the self-holding of the first relay 32, 34 is for activating the second relay 36 for maintaining the creep prevention state, and 35 is The third relay 37 for the electric motor is operated.

7 is a release operation switch, 5 is an accelerator detection switch,
Reference numeral 38 is a normally open contact of the second relay 36, and 39 is a normally closed contact of the second relay 36.

22 is one relative position displacement detection switch, 23 is the other relative position displacement detection switch, 40 is the third relay 37 for the electric motor
Is a normally open contact, and 41 is a normally closed contact of the third relay 37.

42 is the fourth relay for the electric motor, 43 is the fourth relay 42
A normally open contact, and 44 is a normally closed contact of the fourth relay 42. 13 is an electric motor constituting the actuator 11, 45 is a battery 8
Is a resistance provided between the contact and the normally open contact. Electric motor
When the normally open contact 40 is closed and the normally closed contact 41 is opened by the operation of the third relay 37, the normal rotation of 13 is performed by the operation of the fourth relay 42 and the normally open contact 43 is closed, and when the normally closed contact 40 is opened, the reverse rotation is performed. .

“When the control circuit 3 is operated by the operation lever 9, when the relative position displacement detection switch 22 is turned on, the electric motor
When 13 is rotated in the normal direction and the relative position displacement detection switch 22 is turned off, the electric motor 13 is stopped. When released by the operation lever 9, the control circuit 3 reverses the electric motor 13 when the relative position displacement detection switch 23 is turned on, and stops the electric motor 13 when the relative position displacement detection switch 23 is turned off.

When operating with the operating switch 6, the control circuit 3
When the brake detection switch 2 and the braking force detection switch 21 are turned on and the operation control switch 6 is turned on, the electric motor 13 is rotated in the normal direction, the relative position displacement detection switch 23 is turned on, and the braking force detection switch 21 is turned off. Then, the electric motor 13 is stopped.

In the case of release by the release operation switch 7, the control circuit 3
When the release operation switch 7 is turned off and the relative position displacement detection switch 23 is turned on, the electric motor 13 is rotated in the reverse direction, and when the relative position displacement detection switch 23 is turned off, the electric motor 13 is stopped.

Next, the operation will be described.

First, the case of operating the operation lever 9 will be described.

When the operation lever 9 is pulled up, the balance lever 14 is tilted, one relative position displacement detection switch 22 is closed, and the third relay 37 is turned on. Normally open contact by turning on the third relay 37
When 40 is closed and the normally closed contact 41 is opened, the electric motor 13 rotates in the normal direction to assist the operating force of the operating lever 9. When the balance lever 14 is balanced by the operation of the electric motor 13, the relative position displacement detection switch 22 is opened and the third relay 37 is turned off, so that the electric motor 13 is stopped. In this way, the parking brake is operated by the operating lever 9 and the electric motor 13.

Next, when the operation lever 9 is returned, the balance lever 14 tilts and the other relative position displacement detection switch 23 closes, and the fourth
The relay 42 is turned on. Therefore, the normally open contact 43 is closed,
Since the normally closed contact 44 opens, the electric motor 13 rotates in the reverse direction. When the balance lever 14 is balanced by the operation of the electric motor 13,
The relative position displacement detection switch 23 opens, the fourth relay 42 turns off, and the electric motor 13 stops. In this way, the parking brake is released.

Next, a case where the operation switches 6 and 7 are operated will be described.

Brake detection switch 2 and brake force detection switch
When the operating switch 6 is turned on while both 21 are closed, the first relay 32 is turned on.

When the first relay 32 is turned on, the normally closed contacts 33, 34, 35 are closed,
The first relay 32 is self-held and the third relay 37 is turned on. Further, the second relay 36 is also turned on, the normally open contact 38 is closed and self-held, and the normally closed contact 39 is opened.

When the third relay 37 is turned on, the normally open contact 40 is closed, and the normally closed contact is
Since 41 is opened, the electric motor 13 rotates in the normal direction. Electric motor 13
The balance lever 14 tilts and the relative position displacement detection switch 23 closes, while the braking force detection switch
21 opens, so the first relay 32 turns off and the third relay
37 will also be off. Therefore, the electric motor 13 stops.

In this way, the parking brake can be operated by operating the operation switch 6.

Next, when the release operation switch 7 is turned off, the second relay 36 is turned off, the open normally closed contact 39 is closed, and the relative position displacement detection switch 23 is closed, so the fourth relay 42 is turned on. Becomes When the fourth relay 42 is turned on, the electric motor 13 is reversely rotated, and when the balance lever 14 is balanced, the relative position displacement detection switch 23 is opened, the fourth relay 42 is turned off, and the electric motor 13 is stopped.

In this way, the parking brake can be released by the release operation switch 7.

When the accelerator pedal 4 is depressed, the accelerator detection switch 5 is opened and the parking brake can be automatically released.

[Effects of the Invention] As described above, according to the present invention, the parking brake can be operated or released by both the operation of the operation lever and the operation of the operation switch, and a common actuator is used, which is inexpensive. You can

In the case of the operation switch, the parking brake can be automatically released by operating the accelerator pedal.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an essential part thereof, FIG. 3 is a sectional view of an essential part, and FIG. In the figure, 1: brake pedal, 2: brake detection switch (brake detection means), 3: control circuit (control means), 4: accelerator pedal, 5: accelerator detection switch (accelerator detection means), 6: operating switch, 7: Release operation switch, 8: Battery, 9: Operation lever, 10A, 10B: Rear wheel, 11: Actuator, 12: Reducer, 13: Electric motor, 14: Balance lever, 15: Connection mechanism, 16: Equalizer , 17, 18: Connection member, 18A: Large diameter part, 19: Cylindrical member, 20: Spring, 21: Brake force detection switch (brake force detection means), 22, 23: Relative position displacement detection switch (Relative position displacement detection) Means), 24: bracket member, 31: normally open contact of ignition relay, 32: first relay, 33 to 35: normally open contact of first relay, 36: second relay, 37: third relay, 38: third 2 relay normally open contact, 39: 2nd relay normally closed contact, 40: 3rd relay Normally open contact, 41: normally-closed contact of the third relay, 42: fourth relay, 43: normally open contacts of the fourth relay, 44: normally-closed contact of the fourth relay, 45: resistance.

Claims (2)

[Scope of utility model registration request] 1. A parking brake device equipped with an actuator that operates by operating a parking brake operating lever to reduce the operating force of the parking brake, and commands activation and release of the actuator without operating the operating lever. An operation switch and control means for activating and releasing the parking brake by the actuator based on the operation output of the operation switch are provided, and the control means operates the operation lever of the operation lever at one end to operate the actuator. A balance lever in which power acts on the other end and a braking force of a parking brake acts on an intermediate portion, relative position displacement detection means for detecting relative position displacement between the operation lever and actuator, and a braking force transmitted to the parking brake. Brake force detection hand to detect A step, and a control unit that controls the actuator based on the output of the operation switch, the output of the relative position displacement detection unit, and the output of the braking force detection unit. Is the balance lever is tilted and the relative position displacement detecting means detects that the operating lever is pulled and advances the actuator, and the relative position displacement detecting means detects that the actuator has operated and the balance lever is balanced. Then, the actuator is stopped, and similarly, when the operation lever is returned, the relative position displacement detection means detects that the operation lever is returned and retracts the actuator so that the relative position displacement detection means causes the balance lever to move. When it detects the equilibrium, it stops the actuator, and the operation switch signal of the operation switch. When it detects that the brake force detection means detects that the braking force has reached the set value, the actuator is stopped, and when the release switch signal of the operation switch is detected, the actuator is retracted, The parking brake device, wherein the relative position displacement detecting means stops the actuator when detecting that the inclination of the balance lever is balanced. 2. The control means is further provided with a brake operation detection means for detecting a control operation of a brake pedal and an accelerator operation detection means for detecting a depression operation of an accelerator pedal, and the control section is provided with the brake operation. When the operation switch is operated while the detection output of the detection means is obtained, the parking brake by the actuator is operated, and the actuator is operated when the detection output of the accelerator operation detection means is obtained after the parking brake is operated. The parking brake device according to claim 1, wherein the parking brake is released by means of.