JPH0761739A - Hydraulic power unit for hydraulic elevator - Google Patents

Abstract

PURPOSE:To provide a hydraulic power unit for a hydraulic elevator which reduces oscillation of hydraulic oil in an oil tank so as to prevent overflow of the hydraulic oil and exposure of an oil pump into the air. CONSTITUTION:A motor 3 is suspended by screw rods 11, and is submerged in hydraulic oil 2 in an oil tank 1 together with a hydraulic pump 4 coupled to the motor 3. Further, a plurality of partition plates 21 are welded to the inner wall of the oil tank 1 so that the partition plates 21 is extended from the bottom surface of the oil tank 1 and is projected from the oil level of the hydraulic oil 2, one of the partition plates 21 at a position where it interferes with the motor 3 or the like, being vertically divided. These partition plates 21 constitute a partition body 20 which divides the inside of the oil tank 1 into four parts in the axial direction of the motor 3, and three parts in a direction orthogonal to the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic power unit for a hydraulic elevator in which an electric motor and a hydraulic pump directly connected to the electric motor are immersed in the hydraulic oil and disposed in an oil tank containing the hydraulic oil. It is a thing.

[0002]

2. Description of the Related Art FIG. 11 is a vertical cross-sectional view showing an example of a hydraulic power unit of a conventional hydraulic elevator described in, for example, Japanese Patent Laid-Open No. 3-18585, in which 1 is an oil tank filled with hydraulic oil 2. Reference numeral 3 denotes an electric motor arranged by being immersed in the hydraulic oil 2 in the oil tank 1, 4 is a hydraulic pump directly connected to the electric motor 3 and driven by the electric motor 3, and 5 is a discharge pipe connected to the hydraulic pump 4. , 6 is a flow rate control valve connected to the discharge pipe 5, 7 is a hydraulic jack connected to the flow rate control valve 6 through a pipe 8 for moving up and down a car 9, and 10 is a tip 10a.
Is a return pipe which is inserted into the hydraulic oil 2 and whose rear end is connected to the flow rate connection valve 6. Reference numeral 11 is a threaded rod as a suspension rod attached to a mounting plate 12 attached to the inner wall surface of the oil tank 1, and 13 is a mounting plate attached to the electric motor 3 and having a through hole. Here, in the electric motor 3, the screw rod 11 is passed through the through hole of the mounting plate 13, and the mounting plate 1 is attached to the screw rod 11 with a nut.
3 is fixed by tightening and is suspended in the oil tank 1.

Next, the operation of the conventional hydraulic power unit will be described. When the hydraulic pump 4 is rotated by the electric motor 3, the hydraulic oil 2 is delivered to the hydraulic jack 7 through the discharge pipe 5, the flow rate control valve 6 and the pipe 8, and the car 9 rises. When the flow control valve 6 is switched, the hydraulic oil 2 in the hydraulic jack 7 flows back into the oil tank 1 through the pipe 8, the flow control valve 6 and the return pipe 10, and the car 9 descends.

[0004]

Since the hydraulic power unit of the conventional hydraulic elevator is constructed as described above, when the building in which the hydraulic elevator is installed shakes due to an earthquake or wind, the operation in the oil tank 1 will start. Oil 2 rocks. When the oil level of the hydraulic oil 2 in the oil tank 1 is the highest, the hydraulic oil 2 overflows with the rocking of the hydraulic oil 2 and is applied to the surrounding electronic devices, causing a failure of the electronic devices. When the oil level of the hydraulic oil 2 in the oil tank 1 is the lowest, the hydraulic pump 4 is exposed to the air as the hydraulic oil 2 swings, and the hydraulic pump 4 sucks in the air. There is a problem that the cavitation phenomenon occurs and the hydraulic pump 4 is damaged.

The present invention has been made in order to solve the above problems, and reduces the swing of the hydraulic oil in the oil tank to prevent the hydraulic oil from overflowing and the hydraulic pump being exposed to the air. An object of the present invention is to obtain a hydraulic power unit for a hydraulic elevator that can suppress the breakdown of electronic equipment and the damage of a hydraulic pump.

[0006]

In a hydraulic power unit for a hydraulic elevator according to the present invention, a partition body for partitioning hydraulic oil into a plurality of compartments has its upper end protruding from the oil surface of the hydraulic oil, and It is arranged in the oil tank so as to communicate with the working oil.

Further, a mounting plate is mounted in the oil tank, a suspension rod for suspending the electric motor is mounted on the mounting plate, and a partition is fastened to the suspension rod.

Further, a mounting plate is mounted in the oil tank, a suspension frame for suspending the electric motor is mounted on the mounting plate, and a partition body is mounted on the suspension frame.

Further, the lower end side of the suspension frame for suspending the electric motor is immersed in the hydraulic oil, and the upper end portion thereof is projected from the oil surface of the hydraulic oil to partition the hydraulic oil into a plurality of compartments. is there.

[0010]

In the present invention, since the partition body for partitioning the hydraulic oil into a plurality of compartments is arranged in the oil tank so that the upper end portion of the partition body projects from the oil surface of the hydraulic oil, even if the hydraulic power unit shakes. The fluid motion of the hydraulic oil in the oil tank is hindered and the resonance of the surface wave of the hydraulic oil is suppressed, so that the vibration of the hydraulic oil is reduced. Further, since the plurality of compartments partitioned by the partition body communicate with each other in the hydraulic oil, the supply of hydraulic oil to the hydraulic pump is not hindered and the hydraulic pump operates normally.

Further, since the mounting plate is mounted in the oil tank, the suspension rod for suspending the electric motor is mounted on the mounting plate, and the partition body is fastened and attached to the suspension rod.
Installation of the partition does not require welding work on the inner wall surface of the oil tank or special mounting hardware, and can be easily installed.

Further, since the mounting plate is mounted in the oil tank, the suspension frame for suspending the electric motor is mounted on the mounting plate, and the partition body is mounted on the suspension frame, the width and length of the suspension frame can be increased. The degree of freedom of the mounting position of the partition body is increased.

Further, since the lower end side of the suspension frame for suspending the electric motor is immersed in the hydraulic oil and the upper end portion thereof is projected from the oil surface of the hydraulic oil, the hydraulic oil is partitioned into a plurality of compartments. The suspension frame has the same effect of suppressing the swing of the hydraulic oil as the partition body, and the partition body can be omitted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Example 1. 1 is a sectional side view of a hydraulic power unit of a hydraulic elevator showing Embodiment 1 of the present invention, and FIG.
FIG. 12 is a cross-sectional view taken along line II, in which the same or corresponding parts as those of the conventional hydraulic power unit shown in FIG. 11 are designated by the same reference numerals, and description thereof will be omitted.

In the figure, numeral 20 is welded to the inner wall of the oil tank 1 so as to extend from the bottom surface of the oil tank 1 to above the oil surface of the hydraulic oil 2 and to be perpendicular to the bottom surface of the oil tank 1. The oil tank 1 is composed of a plurality of partition plates 21
It is a partition body that partitions the inside into four in the axial direction of the electric motor 3 and into three in the direction perpendicular to the axial direction. Here, the upper end of the partition plate 21 is configured to protrude from the oil level of the hydraulic oil 2 in the oil tank 1 when the oil level of the hydraulic oil 2 is highest. The partition plate 21 arranged at a position where it interferes with the electric motor 3 and the hydraulic pump 4 has an upper partition plate 21 a so as to avoid interference with the electric motor 3 and the hydraulic pump 4.
And a lower partition plate 21b. further,
Each partition partitioned by the partition plate 21 has a partition plate 21.
Is provided with an opening or the like, and is configured to communicate at a position below the oil level of the hydraulic oil 2 at least when the oil level of the hydraulic oil 2 in the oil tank 1 is the lowest. It should be noted that the construction is similar to that of the conventional hydraulic power unit shown in FIG. 11, except that the partition body 20 is arranged in the oil tank 1.

According to the first embodiment, a plurality of partition plates 2 projecting from the oil surface of the hydraulic oil 2 in the state where the oil surface of the hydraulic oil 2 in the oil tank 1 is highest from the bottom surface of the oil tank 1.
Since the partition body 20 composed of No. 1 is disposed in the oil tank 1, the partition body 20 acts as a resistance that hinders the fluid movement of the hydraulic oil 2, and the oil tank 1 is partitioned into a plurality of compartments. As a result, the resonance of the surface wave of the hydraulic oil 2 is suppressed. Therefore, even if the building in which the hydraulic elevator is installed shakes due to an earthquake or wind, the working oil 2 in the oil tank 1 is prevented from swinging. As a result, even when the oil level of the hydraulic oil 2 in the oil tank 1 is highest, the hydraulic oil 2 swings and the hydraulic oil 2
Can be prevented from overflowing, and the occurrence of failures in peripheral electronic devices can be suppressed. Further, even when the oil level of the hydraulic oil 2 in the oil tank 1 is the lowest, it is possible to prevent the hydraulic pump 4 from rocking and exposing the hydraulic pump 4 to the air, and the hydraulic pump 4 is damaged. Can be prevented.

Further, the respective compartments partitioned by the partition plate 21 are communicated with each other at a position lower than the oil level of the hydraulic oil 2 at least when the oil level of the hydraulic oil 2 in the oil tank 1 is the lowest. Since the hydraulic oil 2 is allowed to flow between the compartments, it is possible to prevent the hydraulic oil 4 around the hydraulic pump 4 from decreasing due to the operation of the hydraulic pump 4 and sucking air. The operation of 4 can be made normal.

In the first embodiment, the electric motor 3 is suspended and disposed in the oil tank 1. However, even in the hydraulic power unit in which the electric motor 3 is not suspended and arranged, the interior of the oil tank 1 may be plural. The same effect can be obtained by arranging the partition body 20 for partitioning into compartments.

Example 2. 3 and 4 are a vertical sectional view and a side sectional view of a hydraulic power unit of a hydraulic elevator showing Embodiment 2 of the present invention. In the drawings, 22 is composed of a plurality of partition plates 23, and an electric motor 3 is provided inside the oil tank 1. The partition body that divides into five in the axial direction and into three in the direction perpendicular to the axial direction, 24 is an L-shaped mounting plate attached to the partition plate 23, and the mounting plate 24 has a through hole. It is set up. Here, the partition body 22 is assembled before being installed in the oil tank 1, and when the electric motor 3 is installed, the screw rod 11 is passed through the through hole of the mounting plate 24, and the screw rod 11 is attached to the electric motor 3 by a nut.
The mounting plate 24 is installed in the oil tank 1 by tightening and fixing the mounting plate 24 together with the mounting plate 13. At this time, the lower end of the partition body 22 is installed with a predetermined gap from the bottom surface of the oil tank 1. Then, the upper end of the partition plate 23 is configured to project from the oil surface of the hydraulic oil 2 in the oil tank 1 in the state where the oil surface of the hydraulic oil 2 is highest. Further, the partition plate 23 arranged at a position where it interferes with the electric motor 3 and the hydraulic pump 4 is divided into two parts, an upper partition plate 23a and a lower partition plate 23b, so as to avoid interference with the electric motor 3 and the hydraulic pump 4. There is.

According to the second embodiment, a plurality of partition plates 2
3 in the oil tank 1 in the axial direction of the electric motor 3
First, a partition body 22 that divides it into three parts in a direction perpendicular to the axial direction.
However, the upper end of the partition plate 23 projects from the oil surface of the hydraulic oil 2,
Moreover, since the partitions are installed in the oil tank 1 so as to communicate with each other, the same effect as that of the first embodiment can be obtained. Further, an L-shaped mounting plate 24 having a through hole is attached to the partition plate 23, and the mounting plate 1 of the electric motor 3 is attached to the screw rod 11.
Since it is tightened and fixed with nuts together with 3, the partition body 22 can be assembled in advance before installation, and the oil tank 1
When it is installed in the inside, welding work and a special mounting bracket are not required, and the workability of installing the partition 22 can be improved.

Example 3. 5 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a third embodiment of the present invention, and FIG. 6 is a sectional view taken along line XI-XI of FIG. 5, where 25 is a length relative to the electric motor 3. And a suspension frame having a large width and provided with fixing holes for mounting the electric motor 3 and the screw rod 11, and 26 is a partition body composed of a plurality of partition plates 27. Here, the suspension frame 25 is hung in the oil tank 1 by passing the threaded rod 11 through the fixing hole, fastening and fixing the threaded rod 11 with the nut. Then, the fixing frame and the through hole of the mounting plate 13 of the electric motor 3 are fixed to the suspension frame 25 with bolts / nuts, and the electric motor 3 is attached. Further, a plurality of partition plates 27 are vertically welded to the suspension frame 25 in the vertical direction, so that the oil tank 1
There are four in the axial direction of the electric motor 3 and three in the direction perpendicular to the axial direction.
It is divided into two. At this time, the upper end of the partition plate 27 provided upright on the suspension frame 25 protrudes from the oil surface of the hydraulic oil 2 in the state in which the oil surface of the hydraulic oil 2 is highest, and the partitioned partitions communicate with each other. Further, the partition plate 27 arranged at a position where it interferes with the electric motor 3 and the hydraulic pump 4 has a notch 27 a so as to avoid interference with the electric motor 3 and the hydraulic pump 4.
Is provided.

According to the third embodiment, a plurality of partition plates 2
7 in the oil tank 1 in the axial direction of the electric motor 3
First, a partition body 26 that divides into three parts in a direction perpendicular to the axial direction.
However, the upper end of the partition plate 27 projects from the oil surface of the hydraulic oil 2,
Moreover, since the partitions are installed in the oil tank 1 so as to communicate with each other, the same effect as that of the first embodiment can be obtained. Further, since the electric motor 3 is attached to the suspension frame 25 suspended from the screw rod 11, and the partition plate 27 is welded to the suspension frame 25, the flexibility of the mounting position and the number of the partition plates 27 is increased. However, the workability of installing the partition 26 can be improved.

Example 4. 7 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a fourth embodiment of the present invention, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7, in which a plurality of 28 are attached to a hanging frame 25. It is an L-shaped mounting bracket, and the mounting bracket 28 is provided with a fixing hole. In the fourth embodiment, the partition plate 26 is configured by tightening and fixing the partition plate 27 with bolts / nuts using the fixing holes of the mounting fitting 28. The other structure is the same as that of the third embodiment.

According to the fourth embodiment, in addition to the effect of the third embodiment, since the mounting bracket 28 for mounting the partition plate 27 on the suspension frame 25 is provided, the partition plate 27 can be added or the mounting position can be improved. Changes can be made easily.

Example 5. 9 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a fifth embodiment of the present invention, FIG. 10 is a sectional view taken along line XX of FIG. 9, and 29 is a length relative to the electric motor 3. And a suspension frame having a U-shaped cross-section with a large width, and fixing holes for mounting the screw rods 11 are provided at the upper ends of both side walls of the suspension frame 29,
A fixing hole for mounting the electric motor 3 is provided on the bottom surface.
Reference numeral 30 denotes a reinforcing plate that is welded so as to be perpendicular to the bottom surface of the suspension frame 29 and orthogonal to the side surface. Here, the hanging frame 29
The threaded rod 11 is passed through the fixing holes provided at the upper ends of both side walls, and the threaded rod 11 is tightened and fixed to the threaded rod 11 with a nut and suspended in the oil tank 1. Then, a fixing hole provided on the bottom surface of the hanging frame 29 and a through hole of the mounting plate 13 of the electric motor 3 are tightened and fixed by bolts / nuts, and the electric motor 3
Is attached. Further, the inside of the oil tank 1 is partitioned into three parts in the axial direction of the electric motor 3 by the two reinforcing plates 30 welded to the bottom surface of the hanging frame 29, and both side walls of the hanging frame 29 are formed in a direction perpendicular to the axial direction. It is divided into three. At this time, both side walls of the suspension frame 29 and the upper end of the reinforcing plate 30 protrude from the oil surface of the hydraulic oil 2 when the oil surface is highest, and the reinforcing plate 30 is provided with a notch or the like between the partitioned sections. To communicate with each other.

According to the fifth embodiment, the suspension frame 29 and the reinforcing plate 30 allow the inside of the oil tank 1 to move in the axial direction of the electric motor 3.
First, the suspension frame 29 and the reinforcing plate 30 are divided into three parts in the direction perpendicular to the axial direction, and the upper ends of the suspension frame 29 and the reinforcing plate 30 are projected from the oil surface of the hydraulic oil 2. 29 and the reinforcing plate 30 serve to suppress the swing of the hydraulic oil 2 and have the same effect as that of the first embodiment.

In the first to fourth embodiments, the oil tank 1 is partitioned by the partition body in the axial direction of the electric motor 3 and in the direction perpendicular to the axial direction.
It is not limited to the axial direction and the direction perpendicular to the axial direction.

In the first to fourth embodiments, the partition plate forming the partition body is arranged vertically to the bottom surface of the oil tank 1, but the partition plate is inclined with respect to the bottom surface of the oil tank 1. You may let it arrange.

In the first and second embodiments, the partition plate installed at the position where it interferes with the electric motor 3 and the hydraulic pump 4 is divided into upper and lower partition plates to avoid interference with them. Form the plate in a U shape,
Alternatively, notches may be provided to avoid interference with them.

Further, in each of the above-described embodiments, the partition body partitions the oil tank 1 into a number of compartments, but the partition body partitioning into two compartments can also provide the effect of suppressing the swinging of the hydraulic oil 2.

[0031]

Since the present invention is constituted as described above, it has the following effects.

In the hydraulic power unit of the hydraulic elevator according to the present invention, the partition body for partitioning the hydraulic oil into a plurality of compartments has its upper end protruding from the oil surface of the hydraulic oil, and the plurality of compartments communicate with each other in the hydraulic oil. Since it is arranged in the oil tank, even if the hydraulic power unit shakes,
The fluid movement of the hydraulic oil in the oil tank is hindered, the resonance of the surface wave of the hydraulic oil is suppressed, the fluctuation of the hydraulic oil is reduced, and the hydraulic oil does not overflow and impinge on the surrounding electronic devices. Without exposing and sucking air,
It is possible to prevent the occurrence of failures in electronic devices and hydraulic pumps.

Further, since the mounting plate is mounted in the oil tank, the suspension rod for suspending the electric motor is mounted on the mounting plate, and the partition body is fastened and mounted on the suspension rod.
The installation work of the partition body can be improved without the need for welding work on the inner wall surface of the oil tank or special mounting hardware to install the partition body.

Further, since the mounting plate is mounted in the oil tank, the suspension frame for suspending the electric motor is mounted on the mounting plate, and the partition body is mounted on the suspension frame, the width and length of the suspension frame can be increased. The degree of freedom of the mounting position of the partition body is increased, and the workability of installing the partition body can be improved.

Further, since the lower end side of the suspension frame for suspending the electric motor is immersed in the hydraulic oil and the upper end portion thereof is projected from the oil surface of the hydraulic oil, the hydraulic oil is partitioned into a plurality of compartments. The suspension frame acts to suppress the swing of the hydraulic oil, and it is possible to prevent the hydraulic oil from overflowing and the hydraulic pump from being exposed without installing the partition body on the tail.

[Brief description of drawings]

FIG. 1 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a vertical sectional view of a hydraulic power unit of a hydraulic elevator showing a second embodiment of the present invention.

FIG. 4 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a second embodiment of the present invention.

FIG. 5 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a third embodiment of the present invention.

6 is a sectional view taken along line XI-XI of FIG.

FIG. 7 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing Embodiment 4 of the present invention.

8 is a cross-sectional view taken along the line VIII-VIII of FIG.

FIG. 9 is a side sectional view of a hydraulic power unit of a hydraulic elevator showing a fifth embodiment of the present invention.

10 is a cross-sectional view taken along the line XX of FIG.

FIG. 11 is a vertical sectional view showing an example of a hydraulic power unit of a conventional hydraulic elevator.

[Explanation of symbols]

 1 oil tank 2 hydraulic oil 3 electric motor 4 hydraulic pump 7 hydraulic jack 9 basket 11 screw rod (hanging rod) 12 mounting plate 20 partition body 21 partition plate 22 partition body 23 partition plate 25 suspension frame 26 partition body 27 partition plate 29 suspension frame

Claims (4)

[Claims] 1. An electric motor and a hydraulic pump directly connected to the electric motor are provided in an oil tank containing hydraulic oil by being immersed in the hydraulic oil. When the car is raised, the hydraulic pump operates to operate the hydraulic pump. A partition that divides the hydraulic oil into a plurality of compartments in a hydraulic power unit of a hydraulic elevator that sends oil to a hydraulic jack outside the oil tank and returns the hydraulic oil from the hydraulic jack into the oil tank when the car descends. A hydraulic power unit for a hydraulic elevator, characterized in that an upper end portion of the body is projected from an oil surface of the hydraulic oil, and the body is arranged in the oil tank so that the plurality of compartments communicate with each other in the hydraulic oil. . 2. A mounting plate is mounted in the oil tank, a suspension rod for suspending an electric motor is mounted on the mounting plate, and a partition body is fastened and mounted on the suspension rod. Hydraulic power unit for hydraulic elevator. 3. The hydraulic elevator according to claim 1, wherein a mounting plate is mounted in the oil tank, a suspension frame for suspending the electric motor is mounted on the mounting plate, and a partition body is mounted on the suspension frame. Hydraulic power unit. 4. A mounting plate is mounted in an oil tank containing hydraulic oil, and an electric motor suspended through a suspension frame mounted on the mounting plate and a hydraulic pump directly connected to the electric motor are the hydraulic oil. When the car is raised, the hydraulic oil is sent to the hydraulic jack outside the oil tank when the car is raised, and when the car is lowered, the hydraulic oil is returned from the hydraulic jack to the oil tank. In the hydraulic power unit of the hydraulic elevator thus configured, the lower end side of the suspension frame is immersed in the hydraulic oil, and the upper end portion thereof is projected from the oil surface of the hydraulic oil to partition the hydraulic oil into a plurality of compartments. A hydraulic power unit for a hydraulic elevator characterized by the above.