Hydraulic power unit for hydraulic elevator system, and hydraulic elevator system

Abstract

To provide a hydraulic power unit that can reduce hydraulic oil consumption and simplify a manufacturing process.SOLUTION: A hydraulic power unit comprises: a tank for storing hydraulic oil; piping for sucking the hydraulic oil stored in the tank; and a filter provided at a suction port of the piping to prevent foreign matters mixed in the hydraulic oil from entering the piping. The tank has a bottom surface section having an upper step section and a lower step section at different heights, the lower step section is formed entirely on the bottom surface section of the tank over a first direction, a step is provided between the upper step section and the lower step section in a second direction of the bottom surface section of the tank, and the filter is disposed in the lower step section.SELECTED DRAWING: Figure 3

Claims

1. A hydraulic power unit for a hydraulic elevator system, A hydraulic tank for storing hydraulic fluid, A pipe for drawing in the hydraulic fluid stored in the aforementioned hydraulic tank, The piping is provided with a filter at the suction port to prevent foreign matter mixed in the hydraulic fluid from entering the piping, The hydraulic tank has a bottom surface consisting of an upper section and a lower section, which are of different heights. In the bottom portion, the lower portion is formed over the entire first direction of the hydraulic tank, In the second direction of the bottom surface of the hydraulic tank, a step difference is provided between the upper section and the lower section. The filter is positioned in the lower section. Hydraulic power unit.

2. The hydraulic tank has a first lower section and a second lower section as the lower section. The hydraulic power unit according to claim 1.

3. The hydraulic tank has a lower section, with a first lower section and a second lower section at both ends of the bottom surface in the second direction. The filters are arranged in the first lower section and the second lower section, respectively. The hydraulic power unit according to claim 2.

4. The hydraulic tank has multiple side sections formed from rectangular plate-like members of the same height, and the bottom section is connected to the bottom surface of a rectangular parallelepiped to which the side sections are connected. The hydraulic power unit according to claim 3.

5. In the hydraulic tank, the upper section between the first lower section and the second lower section is equipped with electronic components. The hydraulic power unit according to claim 4.

6. The electronic component is partially exposed above the bottom surface and partially exposed below the bottom surface. The hydraulic power unit according to claim 5.

7. Below the upper portion of the bottom surface, the side surface of the space in which the electronic component is exposed is covered by the side surface. The hydraulic power unit according to claim 6.

8. The external shape of the hydraulic tank is a rectangular parallelepiped, the first direction is the direction of the short side of the bottom surface of the rectangular parallelepiped, and the second direction is the direction of the long side of the bottom surface of the rectangular parallelepiped. The hydraulic power unit according to claim 1.

9. The bottom surface of the hydraulic tank is formed by a continuous plate-like member that is bent into the shape of the upper and lower sections. The hydraulic power unit according to claim 1.

10. In the hydraulic tank, the difference in height between the upper section and the lower section is lower than the minimum oil level of the hydraulic fluid. The hydraulic power unit according to claim 1.

11. Carriage, A hydraulic jack for raising and lowering the aforementioned elevator car, The hydraulic power unit supplies hydraulic fluid to the hydraulic jack, The aforementioned hydraulic power unit is The hydraulic fluid is stored in a hydraulic tank, A pipe for drawing in the hydraulic fluid stored in the aforementioned hydraulic tank, The piping is provided with a filter at the suction port to prevent foreign matter mixed in the hydraulic fluid from entering the piping, The hydraulic tank has a bottom surface consisting of an upper section and a lower section, which are of different heights. In the bottom portion, the lower portion is formed over the entire first direction of the hydraulic tank, In the second direction of the bottom surface of the hydraulic tank, a step difference is provided between the upper section and the lower section. The filter is positioned in the lower section. Hydraulic elevator system.

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