JPH021350Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an auxiliary winch circuit for a crawler crane or the like, and particularly to an auxiliary winch circuit that can be driven using swing hydraulic pressure.

[Prior Art] Conventionally, crawler cranes and the like equipped with an auxiliary winch are equipped with a switching valve for the auxiliary winch, and
A control lever for operating the auxiliary winch was installed in the driver's cab.

[Problems with the prior art] Conventionally, when installing an auxiliary winch, a switching valve for the auxiliary winch is provided and an operating lever for operating the auxiliary winch is provided in the operator's cab, which requires space in the narrow operator's cabin. It was necessary.

On the other hand, the use of an auxiliary winch requires wiring, etc.
It is limited to specific tasks such as disassembly and assembly,
Considering the frequency of its use, there was a problem in that it wasted a lot of space.

[Means for solving the problem] This invention connects the hydraulic power source 4 through the swing switching valve 3.
An auxiliary winch hydraulic motor 7 is connected via an auxiliary winch electromagnetic switching valve 6 to branch pipes 5 and 5' branched from the supply/discharge pipes 2 and 2' of the swing hydraulic motor 1 connected to the , and the swing brake 8 is connected to the hydraulic power source 10 via the swing brake electromagnetic switching valve 9, and the excitation coil 6a of the auxiliary winch electromagnetic switching valve 6 is switched in conjunction with the operation of the swing switching valve 3. switch 13 and turning;
Power supply 1 via auxiliary winch selection switch 12
1 and the excitation coil 9a of the swing brake electromagnetic switching valve 9 is connected to the power source 11 via the swing brake switch 14 and the swing/auxiliary winch selection switch 12. It is designed to be used for driving as well, and to effectively utilize the space inside the driver's cab.

[Example] The embodiments shown in the drawings will be described below.

1 is a hydraulic motor for swinging, and supply/discharge pipes 2, 2'
It is connected to the outlet port of the swing switching valve 3 via.

The inlet port of the swing switching valve 3 is connected to a hydraulic power source such as a hydraulic pump 4.

In addition, a hydraulic motor 7 for the auxiliary winch is connected to the supply/discharge pipes 2, 2' via an auxiliary winch electromagnetic switching valve 6 to the branch pipes 5, 5' branched from these, respectively.
is connected.

The swing hydraulic motor 1 is equipped with a negative swing brake 8 that always acts on the braking side and releases the brake by hydraulic pressure.
is connected to a hydraulic power source such as a hydraulic pump 10 via a swing brake electromagnetic switching valve 9.

Note that the swing brake 8 may be a positive swing brake, and in this case, the hydraulic pressure supplied to and discharged from the brake may be reversed from that in the case of a negative swing brake.

Reference numeral 11 denotes a power source, and the power source 11 is connected in parallel via a swing/auxiliary winch selection switch 12, one of which is turned on when the swing switching valve 3 is in the operating position.
The other is connected to the excitation coil 6a of the auxiliary winch electromagnetic switching valve 6 via a micro switch 13, and the other is connected to the swing brake electromagnetic switching valve 9 via a normally open swing brake switch 14 provided in the driver's cab. The excitation coil 9a is connected to the excitation coil 9a.

15 is a manual operation lever 16 of the swing switching valve 3, which is a winch drum, and 17 is a relief valve.

It goes without saying that the manual operation lever 15 may be replaced with an electromagnetic operation.

Next, its effect will be explained.

(During turning operation) First, as shown in FIG. 1, the turning/auxiliary winch selection switch 12 is switched to the turning side.

Next, as shown in FIG. 2, when the swing brake switch 14 is turned on, the swing brake electromagnetic switching valve 9
is activated and hydraulic pressure from the hydraulic pump 10 is supplied to the swing brake 8, so the swing brake 8 is released.

Therefore, by operating the swing switching valve 3, hydraulic pressure from the hydraulic pump 4 is supplied to the swing hydraulic motor 1, and the hydraulic motor 1 rotates. (It turns.) At this time, the micro switch 13 is also turned on in conjunction with the operation of the turning switching valve 3, but since it is cut off from the power supply 11 by the turning/auxiliary winch selection switch 12, the auxiliary winch electromagnetic Switching valve 6
is not energized and the auxiliary winch does not operate.

(When operating the auxiliary winch) First, as shown in FIG. 3, by switching the swing/auxiliary winch selection switch 12 to the auxiliary side, the swing brake electromagnetic switching valve 9 is not excited, so the swing brake 8 is maintained in a braking state.

Next, as shown in FIG. 4, when the turning switching valve 3 is operated, the micro switch 13 is turned ON in conjunction with this operation, and the excitation coil 6a of the auxiliary winch electromagnetic switching valve 6 is energized, and the auxiliary winch The electromagnetic switching valve 6 operates to connect the branch pipes 5 and 5'.

Therefore, the hydraulic pressure from the hydraulic pump 4 is supplied to the auxiliary winch hydraulic motor 7 via the swing switching valve 3 and the auxiliary winch electromagnetic switching valve 6.
The motor 7 rotates. (The winch drum rotates.) At this time, the hydraulic pressure from the hydraulic pump 4 is also supplied to the supply/discharge pipes 2 and 2', but since the swing brake 8 is in the braking state as described above, the swing hydraulic pressure is Motor 1 does not rotate.

[Effects of the invention] According to the invention, since the hydraulic circuit for the auxiliary winch is constructed using hydraulic equipment for swinging, an operating lever for the auxiliary winch, a directional control valve for the auxiliary winch, etc. are no longer necessary. In addition to being able to reduce costs, there is no need to install these devices in the driver's cab, so the driver's cab can be used effectively and comfort can be improved.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, where Figure 1 is a state diagram when the swing is stopped, Figure 2 is a state diagram during the swing operation, and Figure 3 is a state diagram when the auxiliary winch is stopped. State Diagram FIG. 4 is a state diagram during operation of the auxiliary winch. 1: Hydraulic motor for swing, 2, 2': Supply/discharge pipe line,
3: Swing switching valve, 4, 10: Hydraulic source, 5,
5': Branch pipe line, 6: Solenoid switching valve for auxiliary winch,
6a, 9a: Excitation coil, 7: Hydraulic motor for auxiliary winch, 11: Power supply, 12: Swivel/auxiliary winch selection switch, 13: Micro switch, 1
4: Swing brake switch.

Claims (1)

[Scope of utility model registration request] A hydraulic motor for an auxiliary winch is connected via an electromagnetic switching valve for an auxiliary winch to branch pipes branched from the supply/discharge pipes of the hydraulic motor for a swing, which are connected to a hydraulic power source via a switching valve for a swing, and The swing brake is connected to the hydraulic power source via the swing brake electromagnetic switching valve, and the excitation coil of the auxiliary winch electromagnetic switching valve is switched in conjunction with the operation of the swing switching valve using a micro switch for selecting the swing/auxiliary winch. An auxiliary device that utilizes hydraulic pressure for swinging, characterized in that it is connected to a power source via a switch, and the excitation coil of the electromagnetic switching valve for swing brake is connected to the power source via a swing brake switch and a swing/auxiliary winch selection switch. winch circuit.