JP3731269B2 - Hydraulic generation mechanism of hydraulic clutch for shield machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shield machine, and more particularly to a hydraulic pressure generating mechanism of a hydraulic clutch for a shield machine.
[0002]
[Prior art]
First, the mechanism of the shield machine according to the prior art will be described with reference to FIG. 4A and 4B show a configuration of a shield machine according to the prior art , in which FIG. 4A is a schematic side view, and FIG. 4B is a side view showing an arrangement of units including a main motor, a speed reducer, and the like. In FIG. 4, the shield machine according to the prior art includes an internal gear 2 in the cutter disk 1 (tunnel diameter), a main motor 6, a hydraulic clutch 5, a speed reducer 4 and a pinion 3, as shown in FIG. A plurality of sets of units are attached. The details of the unit are connected in series and cantilevered as shown in (B). A clutch disk is used for the cutter disk drive part of the shield machine to suppress the current value at the time of starting the electric motor and reduce the power supply preparation capacity. Conventionally, many electromagnetic clutches have been used. If explosion-proof standards are specified for the entire shield machine, the clutch part is exempted by using a hydraulic clutch.
[0003]
[Problems to be solved by the invention]
There are many general-purpose products on the market as an integrated component of an electric motor and a hydraulic pump as a hydraulic pressure generation source of a hydraulic clutch. If explosion-proof specifications are required, the volume and size of the electric motor alone will increase, and if a plurality of small-diameter shields are arranged, the outer diameter of the cutter disk may be exceeded. A conventional shield machine normally rotates during excavation, and reverses when it is digged into the ground or rock. For this reason, it is necessary to eliminate the electric motor that has been a hydraulic pressure generation source of the hydraulic clutch, to generate a specified pressure in both the forward rotation and the reverse rotation, and to operate the hydraulic clutch normally. there were.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention includes a plurality of sets of units each including a main motor, a hydraulic clutch, a speed reducer, and a pinion, and a cutter disk. The pinion serves as an internal gear in the cutter disk. In the shield machine that is engaged,
Two hydraulic pumps are mounted on the outer periphery of the hydraulic clutch storage case,
The hydraulic pump is adapted to generate a hydraulic pressure that operates the hydraulic clutch when the main motor rotates.
Inside the hydraulic pump gear, a one-way clutch that incorporates the operating direction coincides with the operating rotational direction of the two hydraulic pumps and is free during non-designated rotation ,
Each of the two hydraulic pumps uses a pump whose rotation direction is opposite,
And, by utilizing the function of the one-way clutch the main motor forward rotation, one of said two hydraulic pumps in each case reversal generates a hydraulic pressure to operate, the main motor forward, reverse It is an object of the present invention to provide a hydraulic pressure generating mechanism for a hydraulic clutch for a shield machine that can be used for both.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter will be described with reference to FIGS embodiments of the oil pressure generating mechanism of a hydraulic clutch shield machine according to the present invention.
FIG. 1 shows an embodiment of a hydraulic pressure generating mechanism of a hydraulic clutch for a shield machine according to the present invention, and a sectional side view of a case where a hydraulic clutch 11 is housed and attached to a hydraulic clutch housing case 14 .
2 is a cross-sectional view taken along line AA ′ of FIG.
FIG. 3 is a system diagram of the oil distribution path in FIG.
In the present invention, the hydraulic pressure source of the hydraulic clutch 11 incorporated between the main motor 6 to the speed reducer 4 that drives the cutter disk 1 as shown in FIGS. 1 and 3 is used as the hydraulic clutch as shown in FIG. It is generated by two hydraulic pumps P1 and P2 mounted on the storage case 14, and does not require a hydraulic pressure generating motor, and oil of a specified pressure is hydraulically supplied regardless of whether the main motor 6 rotates forward or backward. This is supplied to the clutch 11.
That is, the hydraulic pressure generating mechanism of the hydraulic clutch for the shield machine according to the present invention is:
A shield comprising a plurality of units each consisting of a main motor 6, a hydraulic clutch 11, a speed reducer 4 and a pinion 3, and a cutter disk 1, wherein the pinion 3 is meshed with an internal gear 2 in the cutter disk 1. In the excavator
Two hydraulic pumps P1 and P2 are mounted on the outer periphery of the hydraulic clutch storage case 14, and the hydraulic pumps P1 and P2 generate hydraulic pressure when the main motor 6 rotates.
A one-way clutch 20 is incorporated in the hydraulic pump gear 17,
The two hydraulic pumps P1 and P2 each have a reverse operating rotational direction, and can be used for either forward rotation or reverse rotation by utilizing the function of the one-way clutch 20.
Next, the description will be supplemented with reference to FIGS.
(1) A gear 12 a is attached to the outer periphery of the main motor output shaft insertion boss 12, and the hydraulic pumps P 1 and P 2 are always rotated via the idle gear 18.
(2) As shown in FIG. 2, two hydraulic pumps P1 and P2 are attached, and the hydraulic pumps P1 and P2 have opposite rotation directions (operation rotation directions).
(3) A one-way clutch 20 is incorporated in the hydraulic pump gear 17, and the operating direction coincides with the operating rotational direction of the hydraulic pumps P1, P2.
(4) The one-way clutch 20 incorporated in the hydraulic pump gear 17 of each of the hydraulic pumps P1, P2 is free during non-designated rotation.
(5) The suction ports of the hydraulic pumps P1 and P2 are attached to the bottom surface of the hydraulic clutch housing case 14 (not shown), and an in-line check valve (one-way oil valve) 23 is incorporated in the middle of the suction pipe (see FIG. 3). ), Not to interfere.
(6) The pump discharge port is distributed to the hydraulic clutch 11 via the solenoid valve 21 and the block 22 (see FIG. 3).
Next, the flow of the two oil passages (A) and (B) will be described with reference to FIG.
As for the oil passage (B), when the electric motor rotates, a small amount of lubricating oil is simultaneously fed to the friction surface.
For the oil passage (A), oil is fed only when the solenoid valve is actuated, and the hydraulic clutch 11 is actuated.
[0006]
【The invention's effect】
Since the hydraulic pressure generating mechanism of the hydraulic clutch for the shield machine according to the present invention is configured as described above, the electric motor that has conventionally been the hydraulic pressure generating source of the hydraulic clutch is eliminated, and the hydraulic pressure generating source is used during normal rotation. In both cases, the specified pressure is generated and the hydraulic clutch can be operated normally.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a case where a hydraulic clutch is housed and attached to a hydraulic clutch housing case according to an embodiment of a hydraulic pressure generating mechanism of a hydraulic clutch for a shield machine according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA ′ of FIG.
FIG. 3 is a system diagram of an oil distribution path in FIG. 1;
4A and 4B show a configuration of a shield machine according to the related art , in which FIG. 4A is a schematic side view, and FIG. 4B is a side view showing the arrangement of units such as an electric motor and a speed reducer.
[Explanation of symbols]
1: Cutter disc 2: Internal gear 3: Pinion 4: Reduction gear 5: Hydraulic clutch 6: Main motor 11: Hydraulic clutch 12: Main motor output shaft insertion boss 13: Reduction gear input shaft insertion spline 14: Hydraulic clutch storage case 15: Oil tank 17: Hydraulic pump gear 18: Idle gear 19: Motor flange mounting screw 20: One-way clutch 21: Electromagnetic valve 22: Block 23: In-line check valve P1, P2: Hydraulic pump

Claims (1)

In the shield machine, which is composed of a plurality of units each consisting of a main motor, a hydraulic clutch, a reduction gear and a pinion, and a cutter disk, and the pinion is meshed with an internal gear in the cutter disk.
Two hydraulic pumps are mounted on the outer periphery of the hydraulic clutch storage case,
The hydraulic pump is adapted to generate a hydraulic pressure that operates the hydraulic clutch when the main motor rotates.
Inside the hydraulic pump gear, a one-way clutch that incorporates the operating direction coincides with the operating rotational direction of the two hydraulic pumps and is free during non-designated rotation ,
Each of the two hydraulic pumps uses a pump whose rotation direction is opposite,
And, by utilizing the function of the one-way clutch the main motor forward rotation, one of said two hydraulic pumps in each case reversal generates a hydraulic pressure to operate, the main motor forward, reverse A hydraulic pressure generating mechanism for a hydraulic clutch for a shield machine, which can be used for both.

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