JP5926049B2 - Hydraulic device - Google Patents

Description

  The present invention relates to a hydraulic apparatus that drives a hydraulic pump by an electric motor and pressurizes and discharges hydraulic oil sucked from a hydraulic tank by the hydraulic pump.

  Conventionally, as disclosed in Patent Document 1, a housing having a storage chamber connected to a side of a hydraulic tank is provided, the hydraulic tank and the storage chamber are opened above, and the opening is closed with a detachable upper plate. An electric motor, a hydraulic pump that is rotationally driven by the electric motor, and a control valve that controls hydraulic oil from the hydraulic pump and supplies the actuator to the actuator are stored in the storage chamber. The axial direction of the electric motor is arranged parallel to the bottom plate of the housing, and the control valve is arranged side by side on the hydraulic pump and the bottom plate on the side of the hydraulic pump. There are proposals that make work easier.

JP2000-120601A

  However, in such conventional devices, the casing is flat and the electric motor, hydraulic pump, and control valve are arranged side by side on the bottom plate of the casing, so the area required for installation is large, and a large installation area is required. If it could not be secured, there was a problem that it could not be installed. In order to reduce the installation area, the electric motor, hydraulic pump, and control valve must be closely arranged or stacked one above the other, and assembly, maintenance, and inspection work in the storage room can be performed. There was a problem that it became difficult.

  An object of the present invention is to provide a hydraulic apparatus that can be installed even with a small installation area and is easy to assemble, maintain, and inspect.

In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
Provided with a housing with a hydraulic tank on the upper side and a storage chamber on the lower side,
In the axial direction of the electric motor, a hydraulic unit in which a hydraulic pump and a valve device are stacked and integrated in order is stored in the storage chamber with the axial direction set up and down, and a mounting member is integrated with the lower end of the hydraulic unit. The mounting member is mounted on a leg member provided in the storage chamber to form a work space below the mounting member, and the leg member and the mounting member are detachably attached. That is the hydraulic system.

  The leg member attached to the bottom plate of the housing may be erected in the storage chamber, and the attachment member may be placed on the leg member and detachably attached. The leg member and the mounting member may be detachable by screwing by rotation around an axis parallel to the axial direction of the electric motor. Furthermore, it is good also as a structure which pulled out downward from the lower end of the said hydraulic unit through the working space to the side.

  The hydraulic device according to the present invention has a hydraulic tank on the upper side of the housing and a storage chamber on the lower side, and a mounting member attached to the lower end of the hydraulic unit is placed on a leg member provided in the storage chamber to work on the lower side of the mounting member. Since the space is formed and the leg member and the attachment member are detachably attached, the installation can be performed even with a small installation area, and the assembly, maintenance, and inspection work can be easily performed.

  In addition, the leg member attached to the bottom plate of the housing is erected in the storage chamber, so that the attachment and detachment is further facilitated. By attaching and detaching the leg member and the attachment member by screwing by rotation around an axis parallel to the axial direction of the electric motor, attachment is possible even by fastening with screws. By pulling the pipe drawn downward from the lower end of the hydraulic unit to the side through the work space, the pipe can be provided through the work space, and the degree of freedom in the connection direction to the outside is improved.

It is sectional drawing of the hydraulic device as one Embodiment of this invention. It is an AA cross-sectional arrow view of FIG. It is a hydraulic circuit diagram of the hydraulic apparatus of this embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, reference numeral 1 denotes a closed box-shaped housing having a hollow inside. The housing 1 is provided with a hydraulic tank 2 on the upper side and a storage chamber 4 on the lower side of the hydraulic tank 2. It has been. The casing 1 is formed in a rectangular parallelepiped shape so as to be elongated in the vertical direction, and a plurality of suspension bolts 6 are attached to the upper surface of the casing 1.

  The hydraulic tank 2 and the storage chamber 4 are partitioned by an intermediate plate 10, and a bottom plate 12 is provided on the lower surface of the housing 1. Further, a cover plate 14 is attached to the housing 1 by a plurality of bolts 16 so as to be detachable from the side surface of the housing 1 corresponding to the storage chamber 4. By removing the cover plate 14, the side surface of the storage chamber 4 is opened.

  A hydraulic unit 18 is stored in the storage chamber 4, and the hydraulic unit 18 includes an electric motor 20, a hydraulic pump 22, and a valve device 24. In the hydraulic unit 18, a hydraulic pump 22 and a valve device 24 are sequentially stacked and integrated in the axial direction of the electric motor 20. In this embodiment, the hydraulic pump 22 is disposed on the end side of the output shaft (not shown) of the electric motor 20. Further, a valve device 24 is attached to the hydraulic pump 22.

  In the storage chamber 4, the electric motor 20 is stored in an inverted state with the axial direction of the electric motor 20 being the vertical direction, and an attachment member 26 is integrally attached to the lower end of the hydraulic unit 18. In the present embodiment, a plate-like attachment member 26 is attached to the lower surface of the valve device 24, and the attachment member 26 is formed in a size that projects from the valve device 24 in the horizontal direction.

  A pair of leg members 28 and 30 standing from the bottom plate 12 in the storage chamber 4 are provided. In this embodiment, the leg members 28 and 30 are formed in a shape obtained by bending a narrow plate material into a substantially gate shape. The opening side is fixed to the bottom plate 12 with the bottom plate 12 side.

  The mounting member 26 is placed on the leg members 28 and 30 via vibration isolating members 32 made of an elastic body such as rubber provided at the four corners of the mounting member 26, and the mounting member 26 and the vibration isolating member 32 are connected to the electric motor. 20 is screwed by rotation around an axis parallel to the axial direction of the shaft 20, for example, is detachably attached by screw fastening of bolts and nuts, and the vibration isolation member 32 and the leg members 28, 30 are axially connected to the electric motor 20. The screw is removably attached by, for example, screwing of a bolt and a nut by rotation around a shaft parallel to the screw.

  The height of the leg members 28 and 30 is formed on the lower side of the attachment member 26 so as to ensure a work space 34 between the attachment member 26 and the bottom plate 12. The work space 34 is sized so that the attachment member 26 and the leg members 28 and 30 can be easily attached and detached, for example, tightening or loosening of the screw fastening of the vibration isolation member 32 and the leg members 28 and 30 by bolts and nuts. It is formed in a size that allows easy work.

  A joint member 36 protrudes from the valve device 24 through the attachment member 26 into the working space 34, and a high-pressure pipe 38 is connected to the joint member 36. The high-pressure pipe 38 extends from the housing 1 through the side plate 40 to the outside.

  A pressure sensor 42 for detecting the pressure on the discharge side is provided so as to protrude from the mounting member 26 into the work space 34, and a wiring (not shown) is connected to the pressure sensor 42 and pulled out of the housing 1.

  An L-shaped metal fitting 46 is attached to the electric motor 20 at the end on the hydraulic pump 22 side, and the L-shaped metal fitting 46 is provided so as to protrude horizontally. An L-shaped bracket 48 is attached to the side plate 40 of the casing 1, and the L-shaped bracket 48 is provided so as to protrude horizontally, and the L-shaped bracket 46 of the electric motor 20 and the L-shaped bracket on the casing 1 side. It arrange | positions so that the metal fitting 48 may oppose.

  An anti-vibration member 50 is sandwiched between the L-shaped metal fittings 46 and 48, and one of the L-shaped metal fitting 46 and the anti-vibration member 50, and the anti-vibration member 50 and the other L-shaped metal fitting 48 are provided. It is detachably attached by tightening bolts and nuts. The inside of the hydraulic tank 2 and the hydraulic pump 22 are connected by a low-pressure pipe 54 through a filter 52 provided in the hydraulic tank 2.

  Next, the hydraulic circuit of this embodiment will be described with reference to FIG. In the present embodiment, it is used for supplying and discharging hydraulic oil to and from a cylinder that moves up and down a home elevator car. The electric motor 20 is controlled by inverter control, and the hydraulic pump 22 can rotate forward and backward. It is.

  As shown in FIG. 3, a throttle 62 is interposed in the high-pressure flow path 60 of the valve device 24 connected to the discharge side of the hydraulic pump 22, and a check valve 64 is connected in parallel with the throttle 62. Further, a pressure compensation valve 66 is interposed in the high-pressure flow path 60, and two electromagnetically operated pilot operation check valves 68 and 70 are interposed in series.

  The high-pressure channel 60 is connected to the high-pressure pipe 38 via the filter 71. A pressure sensor 42 is connected to the high-pressure flow path 60 on the high-pressure piping 38 side of the two pilot operation check valves 68 and 70.

  A relief valve 72 is connected to the high-pressure flow path 60 on the discharge side of the hydraulic pump 22, and the relief valve 72 is connected to the suction side of the hydraulic pump 22. A pilot relief valve 74 for controlling the relief pressure of the relief valve 72 is also provided.

  When the high-pressure flow path 60 on the discharge side of the hydraulic pump 22 and the suction side of the hydraulic pump 22 are connected via a check valve 76 and a filter 78, the rotation speed of the hydraulic pump 22 cannot be controlled in an emergency. When the elevator car (not shown) starts to descend, the fluid pressure using the lift is applied from the hydraulic tank 2 to reduce the shock.

  When the hydraulic pump 22 is rotated forward, hydraulic oil is drawn into the hydraulic pump 22 from the hydraulic tank 2 through the filter 52 and the low-pressure pipe 54. The high-pressure hydraulic oil discharged from the hydraulic pump 22 is supplied to the high-pressure pipe 38 via the check valve 64, the pressure compensation valve 66, the two pilot-operated check valves 68 and 70, and the filter 71, and is not shown in the elevator car. Rises.

  Further, when the elevator car is lowered, the hydraulic pump 22 is reversely rotated and the two pilot operation check valves 68 and 70 are opened by electromagnetic operation so that the hydraulic oil from the high-pressure pipe 38 is filtered by the filters 71 and 2. The two pilot operated check valves 68 and 70, the pressure compensation valve 66, the throttle 62, the hydraulic pump 22, the low pressure pipe 54, and the filter 52 are returned to the hydraulic tank 2.

  Next, operations and effects of the hydraulic apparatus according to the present embodiment will be described. A hydraulic unit 18 provided with a hydraulic tank 2 on the upper side of the housing 1, a storage chamber 4 on the lower side, and a hydraulic pump 22 and a valve device 24 stacked in order in the axial direction of the electric motor 20. It was stored in the storage chamber 4 with the axial direction being the vertical direction. Thereby, the housing | casing 1 can be formed in a rectangular parallelepiped box shape long to an up-down direction, and an installation area can be made small in the case of installation on a floor surface etc.

  Further, since the mounting member 26 is placed on the leg members 28 and 30 and the work space 34 is secured below the mounting member 26, the fixing work using the fastening members such as bolts between the leg members 28 and 30 and the mounting member 26 is performed. At this time, the axial direction of the fastening member becomes the vertical direction, and the fixing work can be easily performed by inserting a tool such as a spanner used for the fixing work into the work space 34. Similarly, during the work of loosening the fastening member during maintenance / inspection of the hydraulic unit 18, the tool can be inserted into the work space 34 and the loosening work can be easily performed. As described above, since the work space 34 is provided, it can be detachably attached by tightening bolts and nuts.

  Since the leg members 28 and 30 attached to the bottom plate 12 of the housing 1 are erected in the storage chamber 4 and the attachment members 26 are placed on the leg members 28 and 30 so as to be detachable, the attachment is more detachable. It becomes even easier.

  Furthermore, since the work space 34 is provided, the connection work between the high pressure pipe 38 and the valve device 24, for example, the connection work using a tool such as a spanner can be easily performed, and the high pressure pipe 38 can be provided through the work space 34. The direction in which the high-pressure pipe 38 is pulled out can be freely set, and the degree of freedom in the direction of connection to the outside is improved. The leg members 28 and 30 are the same as the L-shaped bracket 48 described above, and an L-shaped leg member is attached to the side plate of the housing 1 so that the attachment member 26 is placed on the leg member. Can also be implemented.

  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.

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Hydraulic tank 4 ... Storage chamber 10 ... Intermediate plate 12 ... Bottom plate 14 ... Cover plate 18 ... Hydraulic unit 20 ... Electric motor 22 ... Hydraulic pump 24 ... Valve device 26 ... Mounting member 28, 30 ... Leg member 32 50 ... Vibration isolation member 34 ... Work space 38 ... High pressure pipe 40 ... Side plate 42 ... Pressure sensor 46,48 ... L-shaped bracket 54 ... Low pressure pipe 60 ... High pressure flow path

Claims (4)

Provided with a housing with a hydraulic tank on the upper side and a storage chamber on the lower side,
In the axial direction of the electric motor, a hydraulic unit in which a hydraulic pump and a valve device are stacked and integrated in order is stored in the storage chamber with the axial direction set up and down, and a mounting member is integrated with the lower end of the hydraulic unit. The mounting member is mounted on a leg member provided in the storage chamber to form a work space below the mounting member, and the leg member and the mounting member are detachably mounted , and the side surface of the housing A hydraulic device characterized in that a lid plate is detachably attached to the storage chamber so that the side surface of the storage chamber can be opened .   2. The hydraulic apparatus according to claim 1, wherein the leg member attached to the bottom plate of the casing is erected in the storage chamber, and the attachment member is placed on the leg member so as to be detachably attached. .   The hydraulic device according to claim 1 or 2, wherein the leg member and the mounting member are detachable by screwing by rotation around an axis parallel to the axial direction of the electric motor.   The hydraulic apparatus according to any one of claims 1 to 3, wherein a pipe drawn downward from a lower end of the hydraulic unit is drawn laterally through a work space.

Images