JP2602961Y2 - Brake control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a brake device used for a traveling vehicle for construction equipment such as a remotely operated vehicle, which is provided with a brake control device using hydraulic pressure or electric or hydraulic pressure in addition to a normal brake control device using a brake pedal or the like. And a brake control device.

[0002]

2. Description of the Related Art FIG. 2 is a system explanatory diagram of a first specific example of a conventional brake control device. In the drawing, when a brake pedal a is depressed in a direction of an arrow b, a brake valve (not shown) is connected via a link fulcrum c and a rod d.
Is operated to perform a braking action. In a remote-controlled vehicle, when a control signal is input to the electric / hydraulic (pneumatic) pressure control device e, the cylinder f is moved to the lever g.
Is rotated in the direction of arrow b, and the brake valve is actuated in the same manner as when the brake pedal a is depressed, so that the braking action is performed.

[0003] Fig. 3 is a system explanatory diagram of a second specific example of the conventional brake control device. In the figure, when a brake pedal h is depressed, a brake valve i is actuated, and pressure oil from an oil tank j passes through a first position k1 of a switching valve k to actuate a brake piston (not shown), and a braking action is performed. Is to be done. And the hydraulic control device m
When a control signal is input to the solenoid valve m, an output signal from the hydraulic control device m operates the solenoid p of the switching valve k via the electric wiring n to switch the switching valve k from the first position k1 to the second position k2, The pressure oil from the oil tank q passes through the hydraulic control device m and the second position k2 of the switching valve k1, actuates the brake piston, and a braking action is performed.

[0004]

In the first embodiment shown in FIG. 2 of the conventional brake control device, the frictional resistance of the piston f1 of the cylinder f and the frictional resistance of the piston f1 during the normal braking operation by depressing the brake pedal a The operation performance of the brake pedal a is significantly reduced by the back pressure on the cylinder bottom side f2. Further, in the second specific example shown in FIG. 3, when the oil tank j and the oil tank q are separate systems, oil moves from one oil tank to the other oil tank due to leakage in the switching valve k. That is, the overflow of oil in one oil tank,
This may cause a shortage of oil in the other oil tank. When the types of the oils in the oil tanks j and q are different, the oil is mixed for the same reason as described above.
It is not possible to employ a specific example device.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is directed to a hydraulic pipe between a brake valve and a brake piston operated by a brake pedal which is a first hydraulic control device. A split cylinder is provided in the passage, a hydraulic line from the brake valve is connected to a first port of the split cylinder, a hydraulic line from the brake piston is connected to a second port of the split cylinder, and a hydraulic line from the second hydraulic control device is A brake control device that connects a hydraulic line to a third port of a split cylinder.
Te, a piston provided inside the split cylinder, the
When pressure is not generated at port 3, the piston is in a straw.
To connect the first port and the second port.
When pressure is generated at 3 ports, reverse piston
Side, and the first port is shut off . Therefore, the case where the first control device such as the brake pedal is operated and the case where the second control device is operated based on the control input signal or the like do not interfere with each other, and therefore, the operability does not affect each other. Further, since the hydraulic oil in the first and second control devices is completely separated by the piston of the split cylinder, it is possible to use different kinds of oil.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a system of an embodiment of a brake control device according to the present invention. FIG. 1 shows a hydraulic pipeline between a brake valve 2 operated by a brake pedal 1 as a first hydraulic control device and a brake piston 3. A split cylinder 4 is provided on the way, the hydraulic line 5 from the brake valve 2 is connected to a port 41 of the split cylinder 4, the hydraulic line 6 from the brake piston 3 is connected to a port 42 of the split cylinder 4, The hydraulic line 8 from the hydraulic control device 7 is connected to the port 4 of the split cylinder 4.
3 is connected. And, inside the split cylinder 4, a piston 44, a spring 45, stoppers 46 and 4
9 are provided. Further, 13 and 14 are oil tanks, and 15 is a brake oil tank.

Next, the operation will be described. In a normal brake control operation, when the brake pedal 1 is depressed, the brake valve 2 operates and the brake oil tank 1
The pressure oil from 5 enters the port 41 of the split cylinder 4 through the hydraulic pipe 5 and activates the brake piston 3 through the hydraulic line 6 from the port 42 while pressing the piston 44 in the direction of arrow 47.

When a normal brake control operation by the brake pedal 1 is not performed and a control input signal such as a remote control signal enters the second hydraulic control device 7 via the electric circuit 9, the hydraulic control device 7 Through passage 8, pressure oil enters split cylinder 4 through port 43, pushing piston 44 in the direction of arrow 48, closing port 41 and disengaging brake piston 3 from port 42 through hydraulic line 6. Activate. When the control input signal disappears and the hydraulic pressure from the second hydraulic control device 7 decreases, the spring 4
5, the piston 44 is returned in the direction of the arrow 47 to restore the state in which the first brake control device using the normal brake pedal 1 can be operated.

[0009]

Since the present invention has been described in detail, the operability of the first control device can be obtained even if a second control device of a different system is added to the normal first brake control device using a brake pedal or the like. Therefore, it is easy to interrupt the emergency brake and to automatically control the brake in the case of using both the manual operation and the wireless operation in a radio-controlled vehicle or the like. In addition, since the oil on the brake piston side can be separated, low-viscosity oil can be used in cold district specifications. In the present invention, a split cylinder may be added in the middle of an existing circuit, and an independent second hydraulic control device may be added. Therefore, equipment can be arranged at the most appropriate position in a narrow vehicle, and the system configuration is easy. . Further, since the operating oil in the first and second control devices is completely separated by the split cylinder, it is possible to use different types of oil. Further, the normal control device and the added control device have a great effect that mechanical / electrical switching is unnecessary and safety is excellent.

[Brief description of the drawings]

FIG. 1 is a system explanatory diagram of an embodiment of a brake control device according to the present invention.

FIG. 2 is a system explanatory diagram of a first specific example of a conventional brake control device.

FIG. 3 is a system explanatory diagram of a second specific example.

[Description of Signs] 1 Brake pedal 2 Brake valve 3 Brake piston 4 Split cylinder 5 Hydraulic line 6 Hydraulic line 7 Hydraulic control device 8 Hydraulic line 41 First port 42 Second port 43 Third port 44 Piston

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masao Fukuda 1-9-9 Minamidai, Kawagoe-shi, Saitama In-house factory of Komatsu Mek Co., Ltd. (56) References

Claims (1)

(57) [Scope of request for utility model registration] 1. A brake pedal as a first hydraulic control device
A split cylinder (4) is provided in the hydraulic line between the brake valve (2) operated by (1) and the brake piston (3), and the hydraulic line (5) from the brake valve (2) is connected to the split cylinder (5). 4) to the first port (41), and connect the hydraulic line (6) from the brake piston (3) to the split cylinder
(4) connected to the second port (42) of the second hydraulic control device (7)
A hydraulic line (8) connected to a third port (43) of a split cylinder (4) .
Install the piston (44) inside the split cylinder (4),
When pressure is not generated at port (43), piston (44)
Troke to connect the first port (41) and the second port (42).
When pressure is generated at the third port (43),
Stroke the stone (44) to the opposite side to
(41) A brake control device , wherein the brake control device is adapted to shut off the brake.