JP4160176B2 - hydraulic unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydraulic unit used as a drive source for a hydraulic elevator or the like, and more particularly to a hydraulic unit suitable for a residential hydraulic elevator.
[0002]
[Prior art]
Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 10-78001, a rectangular box having an upper opening is partitioned by a substantially vertical partition plate, one of which is an oil storage chamber for storing hydraulic oil, and the other is an electric motor and an electric motor. There has been proposed a hydraulic unit having a storage chamber that stores a hydraulic pump that is driven to rotate and sucks and discharges hydraulic oil in an oil storage chamber. In this hydraulic unit, a control valve that controls the supply and discharge of hydraulic fluid to and from the actuator is stored in a storage chamber above the hydraulic pump, and the opening is closed by a detachable upper plate.
[0003]
[Problems to be solved by the invention]
However, in such a conventional hydraulic unit, since the control valve stored in the storage chamber is arranged in the upper part in the vertical direction of the hydraulic pump, the overall height of the hydraulic unit is high, and the pit where the hydraulic unit is installed is located in the hydraulic unit. The depth according to the high height dimension was necessary.
[0004]
In addition, since the dimension of the upper opening of the storage chamber is set according to the size of a substantially cylindrical motor having a long axial dimension relative to the outer diameter dimension and the hydraulic pump connected to the axial end, the motor The width of the upper opening that is set to be slightly larger corresponding to the outer diameter of the motor is narrow, and it is difficult to insert and remove from the upper opening of the electric motor accompanying repair.
[0005]
An object of the present invention is to provide a hydraulic unit that reduces the height dimension and enlarges the upper opening of the storage chamber so that the electric motor can be easily taken in and out of the storage chamber during repair.
[0006]
[Means for Solving the Problems]
In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
A box having a storage chamber connected to the side of an oil storage chamber for storing hydraulic oil is provided, the upper portion of the oil storage chamber and the storage chamber is opened, and the upper opening is closed with a detachable upper plate, An electric motor in the storage chamber, a hydraulic pump that is rotationally driven by the electric motor and sucks and discharges the hydraulic oil in the oil storage chamber, and an operation that controls the hydraulic oil from the hydraulic pump to be supplied to and discharged from the actuator A control valve for controlling oil and returning it to the oil storage chamber is housed, and the electric motor is substantially cylindrical and has a long axial dimension with respect to an outer diameter dimension, and the hydraulic pump is connected to an axial end thereof, The axial direction of the electric motor is arranged in parallel with the bottom plate of the box body, the control valve is arranged side by side on the hydraulic pump and the bottom plate on the side of the hydraulic pump, and is operated by being connected to the control valve. Hydraulic muff to reduce oil pulsation Are arranged on the side of the motor and on the bottom plate on the same side as the control valve, and the hydraulic pump and the oil storage chamber are connected via a suction hose, and the control valve And the oil storage chamber are connected via a return hose, and the control valve and the hydraulic muffler are connected via a supply hose .
[0007]
Furthermore, it is good also as a structure which has arrange | positioned the sound absorption material in the inner surface of the said storage chamber except the inner surface by the side of the said oil storage chamber.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1 and FIG. 2, reference numeral 1 denotes a box, and the box 1 is a cube having a low height with a bottom plate 1a and side plates 1b, 1c, 1d, and 1e surrounding the four sides of the bottom plate 1a being closely fixed. The opening 2 is formed upward. Further, the box 1 is partitioned by a partition plate 4 that is closely and substantially vertically fixed to the bottom plate 1a and the side plates 1c and 1e.
[0009]
One of the partitions is an oil storage chamber 6 in which hydraulic oil is stored, and the other is a storage chamber 8. The opening 2 of the box 1 is closed by separate upper plates 10 and 12 according to the oil storage chamber 6 and the storage chamber 8, and both the upper plates 10 and 12 are detachably attached to the box 1. . In the storage chamber 8, sound absorbing materials 14 a to 14 e are attached to the inner surfaces of the bottom plate 1 a, the side plates 1 b, 1 c and 1 e, and the upper plate 12 except for the partition plate 4 which is the inner surface on the oil storage chamber 6 side. Yes.
[0010]
An electric motor 16 and a hydraulic pump 18 are accommodated in the storage chamber 8. The electric motor 16 is substantially cylindrical and has a longer axial dimension than the outer diameter. The hydraulic pump 18 is connected to the axial end of the electric motor 16. In the present embodiment, the housing of the hydraulic pump 18 is fixedly connected to the housing of the electric motor 16, and the rotating shaft (not shown) of the electric motor 16 and the input shaft (not shown) of the hydraulic pump 18 are key-coupled or coupled. Thus, the hydraulic pump 18 is rotationally driven by the electric motor 16. The electric motor 16 is arranged so that the axial direction of the electric motor 16 is parallel to the bottom plate 1 a and also to the parallel with the partition plate 4, and the electric motor 16 is connected to the bottom plate 1 a of the box 1 through the vibration isolating rubber 19. Are fixed to substantially L-shaped fixing portions 40a and 40b.
[0011]
One end of the suction hose 20 is connected to the suction side of the hydraulic pump 18, and the other end of the suction hose 20 is connected to the strainer 22 provided in the oil storage chamber 6 via the partition plate 4. A control valve 24 is connected to the discharge side of the hydraulic pump 18, and one end of a supply hose 26 is connected to the control valve 24. The other end of the supply hose 26 is connected to a hydraulic muffler 28 that reduces the pulsating flow of hydraulic oil.
[0012]
The control valve 24 is fixed to the hydraulic pump 18 via a pipe 29 that is orthogonal to the axial direction of the electric motor 16 and that protrudes in the horizontal direction parallel to the bottom plate 1a. The hydraulic pump 18 and the bottom plate 1a are located laterally of the hydraulic pump 18. They are stored and arranged in the storage chamber 8 side by side. Since the control valve 24 is fixed to the hydraulic pump 18 via the pipe 29, there is a gap between the control valve 24 and the bottom plate 1a.
[0013]
The hydraulic muffler 28 is arranged at one corner of the storage chamber 8, on the side of the electric motor 16, and on the bottom plate 1a and on the same side as the control valve 24. The hydraulic muffler 28 is disposed on the base plate 28a. It is being fixed to the standing substantially L-shaped fixing | fixed part 40a, 40c. Thereby, each arrangement | positioning of the electric motor 16, the hydraulic pump 18, the control valve 24, and the hydraulic muffler 28 is made to fit compactly within the rectangular range.
[0014]
Connected to the hydraulic muffler 28 is a connection pipe 30 that penetrates the side plate 1 b from the storage chamber 8 and protrudes to the outside, and an actuator (not shown) is connected to the connection pipe 30. Further, the other end of the return hose 34 having one end connected to the control valve 24 is connected to a return pipe 36 provided in the oil storage chamber 6 and opened through the partition plate 4. Note that a pair of leg portions 39a and 39b are formed on the outer bottom portion of the box body 1, and the leg portions 39a and 39b are configured to be installed on a floor surface or the like.
[0015]
In the present embodiment, the hydraulic unit U described above is used in a residential hydraulic elevator as shown in FIG. 3. In this hydraulic elevator, the first floor surface 1FL of the house is dug down, and a shallow pit 40 is formed. Is formed. In the pit 40, pillars 42 to 45 are erected at the four corners, and open / close doors 46 to 48 are provided corresponding to the first to third floors of the house.
[0016]
Further, an elevator room 50 is provided in the four pillars 42 to 45 so as to be movable up and down, and the elevator room 50 is lifted and lowered by a single acting cylinder 52 erected in parallel with the pillars 42 to 45. It is configured. The single acting cylinder 52 is connected to the connecting pipe 30 of the hydraulic unit U, and the hydraulic unit U is installed below the elevator room 50 in the pit 40.
[0017]
Next, the operation of the above-described hydraulic unit U of the present embodiment will be described.
First, when the discharge side of the hydraulic pump 18 and the supply hose 26 are communicated by the control valve 24 and the electric motor 16 is driven to rotate, the hydraulic pump 18 is moved from the oil storage chamber 6 through the strainer 22 and the suction hose 20 to the hydraulic oil. The high-pressure hydraulic oil is supplied to the single-acting cylinder 52 through the control valve 24, the supply hose 26, the hydraulic muffler 28, and the connecting pipe 30. Therefore, the single acting cylinder 52 is driven to the extension side and raises the elevator room 50.
[0018]
Further, when the elevator room 50 is lowered, the control valve 24 is switched to allow the supply hose 26 and the return hose 34 to communicate with each other. Therefore, the hydraulic oil discharged from the single acting cylinder 52 is returned to the oil storage chamber 6 through the connection pipe 30, the hydraulic muffler 28, the supply hose 26, the return hose 34, and the return pipe 36.
[0019]
As described above, the hydraulic unit U includes the electric motor 16, the hydraulic pump 18, the control valve 24, and the hydraulic muffler 28 stored in the storage chamber 8 on the bottom plate 4 a, so that the height of the hydraulic unit U is low, The pit 40 to be installed can be shallow. In maintenance / inspection of the hydraulic unit U, first, the elevator room 50 is raised to the second floor or higher, and the opening / closing door 46 on the first floor is opened.
[0020]
Then, the worker enters the pit 40, removes the upper plate 12 of the hydraulic unit U, and performs maintenance and inspection. When the upper plate 12 is removed, the upper portion of the storage chamber 8 is opened, so that the tool can be easily inserted from the opening 2 even in the pit 40 surrounded by the wall, and maintenance and inspection work is easy. In addition, since the opening 2 of the storage chamber 8 is large, the electric motor 16 can be easily put in and out of the storage chamber 8 accompanying the repair.
[0021]
By arranging the hydraulic muffler 28 on the same side as the control valve 24 on the side of the electric motor 16, the hydraulic muffler 28 is arranged in the empty space of the storage chamber 8 as compared with the case where the hydraulic muffler 28 is stored in the oil storage chamber 6. The hydraulic oil storage amount can be increased without increasing the volume of the oil storage chamber 6.
[0022]
Furthermore, since the hydraulic pump 18 and the control valve 24 and the oil storage chamber 6 are connected via the partition plate 4, many pipes do not jump out of the box 1 and installation is easy. Moreover, since the storage chamber 8 is sealed, water can be prevented from entering the storage chamber 8, the electric system of the electric motor 16 and the control valve 24 is protected, and the sound absorbing materials 14a to 14e are provided. In addition, it is possible to block noise generated with the operation of the electric motor 16 and the hydraulic pump 18, reduce noise, and achieve quietness.
[0023]
When the hydraulic unit U is assembled, since the opening 2 of the storage chamber 8 is large, the assembly operation is easy, and after the electric motor 16, the hydraulic pump 18, the control valve 24, and the hydraulic muffler 28 are stored in the storage chamber 8, flexibility is achieved. Since the hoses 20, 26, and 34 are connected, piping work is easy.
[0024]
The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.
[0025]
【The invention's effect】
As described above in detail, the hydraulic unit of the present invention is low in height, can be easily installed in a shallow pit of a residential hydraulic elevator, and has a large opening, so maintenance and inspection work of the hydraulic unit can be performed in the pit. There is an effect that it can be easily performed.
[0026]
In addition, since the hydraulic muffler is placed on the side of the motor on the same side as the control valve , the hydraulic oil storage volume can be reduced without increasing the volume of the oil storage chamber compared to the case where the hydraulic muffler is stored in the oil storage chamber. In addition, since it is connected with a flexible hose, piping work is easy.
[Brief description of the drawings]
FIG. 1 is a plan view in which a side plate of a hydraulic unit showing one embodiment of the present invention is broken.
2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is a schematic perspective view of a residential hydraulic elevator using the hydraulic unit of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Box 1a ... Bottom plate 1b-1e ... Side plate 2 ... Opening 4 ... Partition plate 6 ... Oil storage chamber 8 ... Storage chamber 10, 12 ... Upper plate 16 ... Electric motor 18 ... Hydraulic pump 22 ... Strainer 24 ... Control valve 28 ... Hydraulic muffler 40 ... Pit 52 ... Single acting cylinder

Claims (2)

A box having a storage chamber connected to the side of an oil storage chamber for storing hydraulic oil is provided, the upper portion of the oil storage chamber and the storage chamber is opened, and the upper opening is closed with a detachable upper plate, An electric motor in the storage chamber, a hydraulic pump that is rotationally driven by the electric motor and sucks and discharges the hydraulic oil in the oil storage chamber, and an operation that controls the hydraulic oil from the hydraulic pump to be supplied to and discharged from the actuator A control valve for controlling oil and returning it to the oil storage chamber is housed, and the electric motor is substantially cylindrical and has a long axial dimension with respect to an outer diameter dimension, and the hydraulic pump is connected to an axial end thereof, The axial direction of the electric motor is arranged in parallel with the bottom plate of the box body, the control valve is arranged side by side on the hydraulic pump and the bottom plate on the side of the hydraulic pump, and is operated by being connected to the control valve. Hydraulic muff to reduce oil pulsation Are arranged on the side of the motor and on the bottom plate on the same side as the control valve, and the hydraulic pump and the oil storage chamber are connected via a suction hose, and the control valve And the oil storage chamber are connected via a return hose, and the control valve and the hydraulic muffler are connected via a supply hose .   The hydraulic unit according to claim 1, wherein a sound absorbing material is disposed on an inner surface of the storage chamber excluding an inner surface on the oil storage chamber side.

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