JP2001227501A - Hydraulic supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize noise, to facilitate maintenance, and to easily cope with an increase in a lifting stroke of an elevator. SOLUTION: A hydraulic motive power part 3 and an oil tank 4 are provided. The hydraulic motive power part 3 is provided with a housing 11 capable of storing oil inside, a pump 12 arranged inside the housing 11 and a motor 13 for driving the pump 12 arranged inside the housing 11. The hydraulic motive power part 3 and the oil tank 4 are mutually connected by a communicating tube 6 for mutually communicating the oil stored inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic supply device used as a drive source for a hydraulic actuator such as a hydraulic jack, a hydraulic cylinder, a hydraulic motor, and a hydraulic elevator.

[0002]

2. Description of the Related Art FIG. 4 is a front view of a conventional hydraulic supply device 80. In FIG. 4, the hydraulic supply device 80 includes an oil tank 81 also serving as a main body, a support plate 86 provided inside the oil tank 81, a motor 82 mounted on the support plate 86, a pump 83, and the like. .

A pump 83 is rotated by a motor 82,
As a result, the working oil in the oil tank 81 is sent to the control valve 84 via the damper 85, and is discharged to the outside according to the switching state of the control valve 84.

[0004]

In the above-described conventional hydraulic supply device 80, since the motor 82 and the pump 83 are of a so-called oil immersion type that sinks in oil, there is an advantage that noise can be suppressed low.

However, in the conventional hydraulic supply device 80, when the motor 82 or the pump 83 breaks down, it cannot be easily replaced and maintenance is not easy.

In other words, in the case of those failures, the lid of the oil tank 81 is removed, the oil in the oil tank 81 is drained, the piping and wiring are removed, and then the motor 82 or the pump 83 is removed and replaced. It will be. The operation is troublesome and time-consuming, so that the external hydraulic equipment cannot be used for a long time.

Further, for example, when a hydraulic cylinder for raising and lowering an elevator is connected as an external hydraulic device, and when the lifting stroke of the elevator is to be increased, the capacity of the oil tank 81 is increased each time. Needs to be changed, and devices such as the motor 82 and the pump 83 need to be installed again.

[0008] Therefore, even in this case, there is a drawback that the operation is troublesome and the elevator cannot be used for a long time. The present invention has been made in view of the above-described problems, and has as its object to provide a hydraulic pressure supply device that can reduce noise, can be easily maintained, and can easily cope with an increase in an elevator up-and-down stroke. I do.

[0009]

According to a first aspect of the present invention, there is provided an apparatus including a hydraulic power unit and an oil tank, wherein the hydraulic power unit is provided inside a housing in which oil can be stored, and inside the housing. And a motor that is provided inside the housing and drives the pump,
The hydraulic power unit and the oil tank are connected to each other by a communication pipe through which oil stored inside communicates with each other.

[0010] The housing is provided with a valve attached to the housing as needed to control oil pumped from the pump. In the device according to the second aspect of the present invention, the pump is disposed below the motor and the suction port thereof is on the lower side, the communication pipe is one, and one end of the communication pipe is connected to the housing. The other end is connected to the lower end of the oil tank.

[0011]

FIG. 1 is a sectional front view of a hydraulic pressure supply device 1 according to the present invention. In FIG. 1, a hydraulic supply device 1
Consists of a hydraulic power unit 3, an oil tank 4, and a frame 5.

The hydraulic power unit 3 includes a housing 11, a pump 12, a motor 13, a control valve 14, and a tank connection port 15. The housing 11 is formed in a substantially rectangular parallelepiped shape by a metal plate or the like, and oil is stored therein.

The pump 12 and the motor 13 are provided inside the housing 11. The motor 13 is fixed using bolts or the like with a gap provided between the motor 13 and the top plate 11a of the housing 11. The pump 12 is integrally connected by a bolt or the like below the motor 13,
The motor 13 is driven to rotate. The pump 12 is arranged so that its suction port is on the lower side, that is, the suction port is near the bottom of the housing 11. In addition, a strainer or the like is appropriately provided at the suction port.

The oil pumped from the pump 12 is supplied to the pipeline 12
After passing through a, it flows into the control valve 14 attached to the upper surface of the top plate 11a. The control valve 14 controls whether or not the pressure oil is discharged, the discharge direction, the discharge pressure, the discharge amount, and the like. The pressure oil sent from the control valve 14 is supplied to an external device, for example, a hydraulic cylinder for an elevator, through the pipe 7. A stop valve 71 is provided in the middle of the pipe 7. The return oil from the control valve 14 is
The fluid flows into the housing 11 through a hole 11b provided in the housing 1a. The inside of the hydraulic power unit 3 is kept airtight by a housing 11.

The control valve 14 is configured by combining various valves to control, for example, an elevator. Such a control valve 14 itself is known.

The tank connection port 15 is provided at the upper end of the housing 11, and one end of the communication pipe 6 is connected thereto. The other end of the communication pipe 6 is connected to a connection part 42 provided at a lower end of the oil tank 4. The oil stored inside the oil tank 4 and the housing 11 communicates with each other through the communication pipe 6. Only one communication pipe 6 is used. In the middle of the communication pipe 6, a stop valve 6 is provided.
1 is provided so as to be operable from outside. An oil supply port (not shown) is provided at an upper portion of the oil tank 4.

The motor 13 is, for example, a three-phase or single-phase induction motor. A cable for supplying power is drawn out of the motor 13 and densely penetrates a wiring hole provided in the top plate 11a. And have been pulled out to the outside.

The frame 5 is framed in a rectangular parallelepiped shape using an angle material or the like. Oil tank 4
It is installed on the upper part of the frame 5 and is fixed with bolts or the like. The hydraulic power unit 3 is detachably attached to an appropriate position inside the frame 5 with a bolt or the like.

As described above, the hydraulic power unit 3 includes the housing 11, the pump 12, the motor 13, and the control valve 14.
Are configured as components. Moreover, since the fluid connection between the oil tank 4 and the load is only the communication pipe 6 and the pipe 7, they can be easily and quickly attached and detached in a short time. Therefore, the entire hydraulic power unit 3 can be easily transported, moved, attached to or detached from the frame 5, and the operation can be performed in a short time.

Therefore, the pump 12 or the motor 13
In case of failure, by replacing the entire hydraulic power unit 3 with a new one, the hydraulic supply device 1 can be restored and operated in a short time. The failed hydraulic power unit 3 may be later slowly disassembled and repaired after determining the cause of the failure. Thus, the maintenance of the hydraulic pressure supply device 1 is easy.

In the housing 11, the suction port of the pump 12 is located near the bottom of the housing 11, and the tank connection port 15 is provided at the upper end of the housing 11. Communication pipe 6 connected to
Therefore, even if air is mixed into the housing 11, the air is easily separated from the oil and naturally flows out toward the oil tank 4 through the communication pipe 6. Therefore, there is no need to separately provide a flow path for air bleeding, and a single communication pipe 6 is sufficient, and the structure is simplified.

Further, since the motor 13 and the pump 12 are immersed in the oil in the housing 11, noise can be suppressed low. Since the hydraulic power unit 3 and the oil tank 4 are completely separable, the degrees of freedom of the hydraulic power unit 3 and the oil tank 4 are increased. Further, for example, when the elevator stroke increases, the oil tank 4 can be easily dealt with by replacing the oil tank 4 with a larger one.

Next, a hydraulic supply device 1B according to another embodiment will be described. FIG. 2 shows a hydraulic supply device 1 according to another embodiment.
It is sectional front view of B. In FIG. 2, a hydraulic supply device 1
B comprises a hydraulic power unit 3 and an oil tank 4B. The port of the hydraulic jack HC is connected to the tip of the pipe 7 of the hydraulic power unit 3. Since the hydraulic power unit 3 is the same as that described in FIG. 1, the description here is omitted.

The oil tank 4B has the same function as the oil tank 4 described with reference to FIG.
Instead of being attached to the frame 5 as shown in FIG. 1, it is attached to the wall surface WL as shown in FIG.
The oil tank 4B is arranged such that the height position of the bottom surface portion thereof is substantially the same as the height position of the upper surface of the housing 11 of the hydraulic power unit 3. The hydraulic power unit 3 and the oil tank 4B are connected by a communication pipe 6.

That is, in the hydraulic supply device 1B, the hydraulic power unit 3 and the oil tank 4B can be separately installed at appropriate places. Therefore, for example, even if there is no dedicated machine room, it can be easily installed in an empty place.

Therefore, the hydraulic supply device 1B is suitable as a hydraulic supply device for a machine room-less type hydraulic elevator, a staircase type hydraulic elevator, a hydraulic lifter, and the like.

FIG. 3 is a view showing an oil tank 4C of another embodiment. In FIG. 3, the oil tank 4C also serves as a pillar of the building. That is, the pillar of the building is the oil tank 4C. This eliminates the need for a special installation space for the oil tank 4C, so that the hydraulic supply devices 1 and 1B can be further reduced in space.

In the above embodiment, the tank connection port 15
As the connecting portion 42, a pipe, a screw hole, various pipe joints, or the like can be used. As the communication pipe 6 and the pipe 7, a fixed pipe or a flexible pipe such as a hose can be used. In addition, the structure, shape, number, material, and the like of the housing 11, the hydraulic power unit 3, the oil tanks 4, 4 </ b> B, 4 </ b> C, and the hydraulic supply units 1, 1 </ b> B are all different from those described above. Can be.

[0029]

According to the present invention, noise can be suppressed low and maintenance is easy. Moreover, it is easy to cope with a change in the amount of oil, such as an increase in the elevator up-and-down stroke.

[Brief description of the drawings]

FIG. 1 is a sectional front view of a hydraulic pressure supply device according to the present invention.

FIG. 2 is a sectional front view of a hydraulic supply device according to another embodiment.

FIG. 3 is a diagram showing an oil tank according to another embodiment.

FIG. 4 is a front view of a conventional hydraulic supply device.

[Explanation of symbols]

 1, 1B Hydraulic supply device 3 Hydraulic power unit 4, 4B, 4C Oil tank 6 Communication pipe 11 Housing 12 Pump 13 Motor 14 Control valve (valve)

Claims (2)

[Claims] 1. A hydraulic power unit and an oil tank, wherein the hydraulic power unit includes a housing in which oil can be stored, a pump provided in the housing, and a pump provided in the housing. A hydraulic motor, comprising: a motor for driving a pump; wherein the hydraulic power unit and the oil tank are connected to each other by a communication pipe for communicating oil stored in each of the hydraulic power units and the oil tank. apparatus. 2. The pump according to claim 1, wherein the pump is disposed below the motor and a suction port thereof is positioned below the motor, the communication pipe is one, and one end is connected to an upper end of the housing. The hydraulic supply device according to claim 1, wherein the other end is connected to a lower end of the oil tank.