JPH07217602A - Oil pressure unit - Google Patents

Abstract

PURPOSE:To miniaturize an oil pressure unit, and facilitate its operation by suppressing the whole height thereof without reducing its capacity for reserving operating oil in an oil tank. CONSTITUTION:A recessed part 4 which is isolated from the inside of an oil tank 1 is formed by sinking it from upper plates 3A, 3B of the oil tank 1 in which operating oil is reserved, a vertical electrically driven motor 6 which is connected integratedly to the hydraulic pump 7 which is oriented upward is mounted in the recessed part 4, the electrically driven motor 6 mounted in the recessed part 4 is provided by opening the side of the recessed part 4 outward so as to take out the electrically driven motor 6 horizontally. In a capacity for reserving operating oil which is reduced by miniaturizing the width size and the lateral size of the oil tank 1, a reducing amount is supplemented by increasing the height of a position other than the recessed part 4 of the oil tank 1, so that increase of the height which is caused by supplementing the reducing amount is not under the influence of the recessed part 4. Even if the height of a position other than the recessed part 4 is increased, both height levels of the electrically driven motor 6 mounted in the recessed part 4 and an oil pressure pump 7 which is connected integratedly to the electrically driven motor 6 are not changed, and the whole height of the hydraulic unit can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pump rotatably driven by an electric motor for sucking and discharging stored hydraulic oil in an oil tank to supply it to an external load or discharging hydraulic oil discharged from an external load in the oil tank. Regarding the hydraulic unit that returns to
Particularly, the hydraulic unit is suitable as a drive source for a residential hydraulic elevator.

[0002]

2. Description of the Related Art Conventionally, this type of hydraulic unit has been disclosed in Japanese Patent Laid-Open No.
A hoistway 2 as shown in FIG. 6 of Japanese Patent No. 152889.
6 is installed inside the machine room 27 adjacent to the hydraulic unit 2
By supplying the hydraulic oil to the cylinder 30 by flowing the pipe 29 from 8, the plunger 31 rises and the plunger 31
When the car 32 at the upper end of the car rises in the hoistway 26 along the guide rail 33, or when the car 32 descends,
The hydraulic oil discharged from the cylinder 30 due to the weight of the car 32 flows through the pipe 29, and the oil tank 34 of the hydraulic unit 28
It is provided so as to be returned to the inside and descend the car 32. The hydraulic unit 28 is constructed by installing an oil tank 34 on a frame 37 in which an electric motor 35, a hydraulic pump 36 and the like are housed inside, separately from the electric motor 35 and the hydraulic pump 36.

[0003]

In recent years, from the viewpoint of space saving, a hydraulic unit 28 has been installed in the hoistway 26 to eliminate the machine room 27. However, since the plunger 31 and the basket 32 are provided in the hoistway 26, the installation space of the hydraulic unit 28 is limited, and the width dimension of the hydraulic unit 28 (the right angle to the plane of FIG. direction)
If the horizontal dimension (horizontal direction in FIG. 6) is reduced, the width dimension and the horizontal dimension of the oil tank 34 are reduced accordingly, and the capacity for storing hydraulic oil is reduced. The height of the tank 34 (vertical direction in FIG. 6) must be increased, and the height of the hydraulic unit 28 as a whole becomes high accordingly. Therefore, when the hydraulic unit 28 is installed in the hoistway 26, it should be handled. There was a problem that it became difficult. The present invention solves such a problem, and provides a small-sized and easy-to-handle hydraulic unit that suppresses the overall height without reducing the capacity of the oil tank for storing the hydraulic oil.

[0004]

Therefore, according to the present invention, an electric motor and a hydraulic pump, which is rotationally driven by the electric motor and sucks and discharges the stored hydraulic oil in the oil tank, are arranged in an oil tank having hydraulic oil stored therein. A hydraulic unit that supplies the hydraulic oil discharged from the hydraulic pump to an external load and recirculates the hydraulic oil discharged from the external load into the oil tank. The hydraulic pump is installed in a vertical position above the electric motor.The oil tank is recessed from the upper plate that closes the upper opening of the oil tank to form a recess that is isolated from the inside of the oil tank. The vertical electric motor connected to the concave portion is accommodated and provided, and the lateral side of the concave portion is opened to the outside so that the electric motor accommodated in the concave portion can be taken out in the horizontal direction.

[0005]

In the structure of the present invention, the hydraulic oil that is reduced by increasing the height of the oil tank other than the concave portion for accommodating the electric motor to reduce the width and lateral dimensions of the oil tank is stored. The increase in height by compensating for the decrease in capacity and compensating for the decrease does not affect the recess. For this reason,
Even if the height of the parts other than the recess is increased, the height of the electric motor housed in the recess and the hydraulic pump integrally connected to the upper direction of the electric motor does not change, and it is installed specially on the electric motor and hydraulic pump. Compared with the conventional hydraulic unit in which the height of the oil tank is inevitably increased by increasing the height of the oil tank, the height of the entire hydraulic unit can be suppressed, and the size and size of the hydraulic unit can be easily handled. The electric motor housed in the recess can be taken out horizontally along with the hydraulic pump from the side of the recess that is open to the outside, so maintenance and inspection can be performed well even when the installation location of the hydraulic unit is restricted upward. Can be done

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, 1 is a hydraulic unit 2
In this oil tank, the upper part is opened to form a concave shape capable of storing hydraulic oil therein. 3A and 3B are upper plates of the oil tank 1, which are arranged to close the upper opening of the oil tank 1.
It is fixed to and detached from. Reference numeral 4 denotes a recess formed by being recessed from the upper plates 3A, 3B of the oil tank 1.
A substantially U-shaped plate member 5 having a width dimension equal to the width dimension between B is welded and fixed to be provided separately from the inside for storing the hydraulic oil, and is provided laterally on the side plate 1A side and lateral side plate 1B side. Are opened to the outside respectively.

Reference numeral 6 denotes an electric motor integrally connected to a hydraulic pump 7. A rectangular bracket 6A is integrally formed at the upper end of the electric motor so as to project in the left-right direction in FIG. It is provided as a vertical shape positioned in the direction. The electric motor 6 is housed in the recess 4, and in this housed state, the bracket 6 located on the upper plates 3A, 3B.
A is the upper plate 3 through the four cushioning members 8 made of vibration-proof rubber.
It is detachably fixed to A and 3B by four screw members 9. The hydraulic pump 7 is located near the upper plates 3A and 3B in a state where the electric motor 6 is housed in the concave portion 4, and is driven by the electric motor 6 so as to suck and discharge the stored working oil in the oil tank 1. There is. Reference numeral 10 denotes a suction pipe, which is connected to the hydraulic pump 7 and is inserted through the upper plate 3A so that one end side having the strainer 11 is immersed in the stored hydraulic oil.

Reference numeral 12 is a control valve connected to the discharge side of the hydraulic pump 7, which controls the hydraulic oil discharged from the hydraulic pump 7 to supply it to a cylinder of a residential hydraulic elevator as an external load (not shown) or discharge it from this cylinder. It is provided so that the generated hydraulic oil is controlled to flow back into the oil tank 1. Reference numeral 13 is a return pipe which circulates the hydraulic oil discharged from the cylinder and controlled by the control valve into the oil tank 1. The return pipe 13 is connected to the control valve 12, the upper plate 3B is inserted, and one end side is immersed in the stored hydraulic oil. ing. Reference numeral 14 is a hydraulic muffler for reducing the pulsating flow of the hydraulic oil supplied to the cylinder and the hydraulic oil discharged from the cylinder. The hydraulic muffler is connected to the control valve 12 via the first supply / discharge pipe 15, and the second supply / discharge pipe 16 is connected. It is provided by connecting to the cylinder. Then, the hydraulic muffler 14 is provided with a rectangular plate-shaped flange member 17 welded and fixed to an upper end thereof,
Four cushioning members 1 made of vibration-proof rubber for the flange member 17
By being detachably fixed to the upper plate 3B by means of four screw members 19 via 8, the upper plate 3B is inserted by loose fitting and arranged in the oil tank 1. A control valve 12 is mounted on the flange member 17 of the hydraulic muffler 14, and the control valve 12 is detachably fixed by four screw members 21 via an L-shaped member 20.

Reference numeral 22 denotes a cover member which is formed in a substantially quadrangular shape and covers the oil tank 1, the electric motor 6, the hydraulic pump 7, the control valve 12, and the hydraulic muffler 14 and is orthogonal to the side plates 1A and 1B of the oil tank 1 and faces each other. 2 side plates 1C, 1D
1B is formed so as to project outwardly and extends above the upper plates 3A, 3B, and the side plates 22 of the same height as the side plates 1C, 1D are provided at the protruding ends of the side plates 1C, 1D.
A and 22B are detachably fixed, and an upper opening surrounded by the side plates 1C and 1D and the side plates 22A and 22B is closed by an upper plate 22C. Gaps 23A and 23B are formed between the outer surfaces of the side plates 1A and 1B of the oil tank 1 and the inner surfaces of the side plates 22A and 22B of the cover member 22, respectively.
Although not shown, a sound absorbing member made of a stretchable flexible urethane urethane foam is adhered to the inner surfaces of the side plates 22A and 22B so as to fill 3B.

Next, the operation 0 of such a configuration will be described. When the hydraulic pump 7 is rotationally driven by the electric motor 6, the hydraulic pump 7 sucks the stored hydraulic oil in the oil tank 1 through the suction pipe 10 and discharges it. The hydraulic oil discharged from the hydraulic pump 7 is the control valve 1
It is controlled by 2 and flows through the first supply / discharge pipe 15 to reduce the pulsating flow by the hydraulic muffler 14 and flows through the second supply / discharge pipe 16 to be supplied to the cylinder to raise the residential hydraulic elevator. And the electric motor 6
And the noise generated by the operation of the hydraulic pump 7 is
Sound is absorbed by the sound absorbing material that is shielded by 2 and provided so as to fill the gaps 23A and 23B, and good quietness can be achieved.

Further, the hydraulic pump 7 is stopped, and the hydraulic oil discharged from the cylinder by the own weight of the hydraulic elevator for home is made to flow through the second supply / discharge pipe 16 and the pulsating flow is reduced by the hydraulic muffler 14 to make the first supply / discharge. The pipe 15 is made to flow and controlled by the control valve 12, and the return pipe 13 is made to flow and is returned into the oil tank 1 to descend the residential hydraulic elevator.

With this operation, the vertical electric motor 6 in which the hydraulic pump 7 is positioned in the upward direction and integrally connected is connected to the oil tank 1.
The width dimension of the oil tank 1 is increased by making it recessed from the upper plates 3A and 3B and accommodating in a recess 4 formed separately from the inside of the oil tank 1 and increasing the height of the oil tank 1 except the recess 4. By compensating for the decrease in the capacity for storing hydraulic oil, which is reduced by reducing the horizontal direction (the vertical direction in FIG. 2) and the lateral dimension (the horizontal direction in FIG. 1),
Since the increase in height by compensating for the decrease does not affect the concave portion 4, even if the height of the parts other than the concave portion 4 is increased,
The heights of the electric motor 6 and the hydraulic pump 7 integrally connected to the electric motor 6 in the upward direction are not changed, and by increasing the height of the electric motor and the oil tank specially installed on the hydraulic pump. Compared with the conventional hydraulic unit in which the overall height inevitably increases, the overall height of the hydraulic unit 2 can be suppressed without reducing the capacity for storing the hydraulic oil in the oil tank 1, and the size is small. Can be easily handled.

Further, the electric motor 6 housed in the recess 4 has the hydraulic pump 7 in which the connection between the suction pipe 10 and the control valve 12 is released by loosening the screw member 9 and releasing the fixation to the upper plates 3A and 3B. At the same time, the side plate 22A or 22B of the cover member 22 is removed, and the side plate 1A of the recess 4 opened to the outside.
It can be taken out horizontally from the side of the side plate or the side of the side plate 1B, so maintenance and inspection should be performed while the installation location of the hydraulic unit 2 is restricted to the upper direction such as the hoistway (see Fig. 6). It can be done well. Furthermore, the electric motor 6 and the hydraulic muffler 1 in which the hydraulic pump 7 is integrally connected.
4 is upper plates 3A, 3 via the cushioning members 8 and 18, respectively.
Since it is fixed to B, the vibrations generated by the operation of the electric motor 6 and the hydraulic pump 7 and the vibrations generated by the introduction of the hydraulic oil into the hydraulic muffler 14 are absorbed by the buffer members 8 and 18 and propagated to the oil tank 1. Can be reduced, and better quietness can be achieved. Furthermore, since the control valve 12 connected to the hydraulic pump 7 is detachably fixed to the flange member 17 of the hydraulic muffler 14, when the hydraulic pump 7 is taken out for maintenance and inspection, it is connected to the hydraulic pump 7. Even if it is released, the fixed state can be maintained, and it is not necessary to take it out together with the hydraulic pump 7, and it can be easily handled. Furthermore,
Since the electric motor 6 and the hydraulic pump 7 are integrally connected to each other and the hydraulic pump 7 is provided as a vertical shape positioned above the electric motor 6 and is housed in the recess 4 of the oil tank 1, the hydraulic pump is positioned below the electric motor. The hydraulic pump 7 can be located in the vicinity of the upper plates 3A and 3B, and the suction pipe 10 and the control located on the upper plates 3A and 3B can be compared with a case where the hydraulic pump 7 is installed as a vertical type and is housed in a recess. The connection with the valve 12 can be made easily.

In the embodiment, the cushioning members 8 and 18 are made of vibration-proof rubber, but it is needless to say that they may be made of spring members.

FIG. 4 shows another embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. Upper plates 3A, 3B of the oil tank 1
The recessed portion 4A formed by further recessing opens the lateral side on the side plate 1A side formed in a concave shape to the outside, but the side plate 1E facing the side plate 1A is formed in a flat plate shape to close the lateral side on the side plate 1E side. Is provided. Then, it is possible to obtain the same operation and effect as the one embodiment.

FIG. 5 shows still another embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described. Recess 4B of oil tank 1
The plate members 24A and 24B are welded and fixed to the opposite side walls of the substantially U-shaped plate member 5A. The electric motor 25, which is integrally connected by positioning the hydraulic pump 7 in the upper direction, has a rectangular bracket 25A in the middle thereof.
Are integrally formed and are provided so as to project in the left-right direction in FIG.
With the electric motor 25 housed in the recess 4B, the plate member 24A,
A bracket 25A located on 24B is detachably fixed to the plate members 24A and 24B by four screw members 9 via four buffer members 8. Then, it is possible to obtain the same operation and effect as the one embodiment.

[0017]

As described above, according to the present invention, the electric motor and the hydraulic pump are integrally connected to each other, and the hydraulic pump is provided as a vertical mold positioned above the electric motor, and the oil tank has an upper plate for closing the upper opening thereof. A recessed part that is further recessed is formed to be isolated from the inside of the oil tank, and a vertical type electric motor integrally connected to the hydraulic pump is installed in this recessed part, and the electric motor housed in the recessed part can be taken out horizontally. By opening the side of the recess to the outside, increasing the height of the oil tank specially installed on the electric motor and hydraulic pump will inevitably increase the overall height. Compared with the unit, the height of the entire hydraulic unit can be suppressed without reducing the capacity for storing the hydraulic oil in the oil tank, and it is small and easy to handle. Also, the electric motor housed in the recess can be taken out horizontally along with the hydraulic pump from the side of the recess that is open to the outside, so good maintenance and inspection is possible even when the installation location of the hydraulic unit is restricted upward. Can be done Furthermore, since the electric motor and the hydraulic pump are integrally connected and the hydraulic pump is provided as a vertical shape that is positioned above the electric motor and is housed in the recess of the oil tank, the hydraulic pump is positioned below the electric motor. Compared to the case where it is installed as a vertical type and is housed in the recess, the hydraulic pump can be located near the upper plate, and there are many devices on the upper plate that connect to the hydraulic pump. It has an effect that connection can be easily performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hydraulic unit showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of an oil tank showing a main part of the embodiment.

FIG. 4 is a perspective view of an oil tank showing a main part of another embodiment of the present invention.

FIG. 5 is a vertical sectional view of a hydraulic unit according to still another embodiment of the present invention.

FIG. 6 is a schematic view showing a conventional example.

[Explanation of symbols]

 1 oil tank 2 hydraulic unit 3A, 3B upper plate 4, 4A, 4B recess 6, 25 electric motor 7 hydraulic pump

Claims (4)

[Claims] 1. An oil tank that stores hydraulic oil inside thereof is provided with an electric motor and a hydraulic pump that is rotationally driven by the electric motor to suck and discharge the stored hydraulic oil in the oil tank. A hydraulic unit that supplies the external load or recirculates the hydraulic oil discharged from the external load into the oil tank. The electric motor and the hydraulic pump are integrally connected, and the hydraulic pump is positioned above the electric motor. It is provided as a vertical type, and the oil tank is recessed from the upper plate that closes the upper opening of the oil tank to form a recess that is isolated from the inside of the oil tank. The hydraulic unit is characterized in that the side of the recess is opened to the outside so that the electric motor accommodated in the recess can be taken out in the horizontal direction. 2. The hydraulic unit according to claim 1, wherein the concave portion accommodating the electric motor has one of its lateral sides opened to the outside and the other closed. 3. The hydraulic unit according to claim 1, wherein the electric motor housed in the recess is detachably fixed to the upper plate of the oil tank. 4. The hydraulic unit according to claim 1, wherein the electric motor housed in the recess is detachably fixed to the recess.