JP2008039021A - Hydraulic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic device wherein a plurality of control valves can be placed on the side surface of a manifold in the horizontal direction on an upper plate of an oil tank equipped with an electric motor and a hydraulic pump rotated and driven by the electric motor, an increase in the occupied area of the whole device in the horizontal direction is restrained, and the limitation of an installation place is prevented. <P>SOLUTION: The hydraulic pump 4 sucking and delivering a stored working fluid and the electric motor 3 rotating and driving the hydraulic pump 4 are installed on the upper plate 2 of the oil tank 1. A bracket member 13 is vertically arranged on the upper plate 2, and an upper part of the bracket member 13 is positioned in a section higher than the hydraulic pump 4 and the electric motor 3. The manifold 15 is vertically provided on the upper part of the bracket member 13, and a plurality of control valves 17, 18, 19 and 20 each controlling the working fluid are placed on the side surface of the manifold 15 in the horizontal direction. The control valves 17 to 20 are arranged to be overlapped with one another over the hydraulic pump 4 and the electric motor 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention places a hydraulic pump that sucks and discharges stored hydraulic oil on an upper plate of an oil tank that stores hydraulic oil, and an electric motor that rotationally drives the hydraulic pump, and controls hydraulic oil discharged from the hydraulic pump The present invention relates to a hydraulic apparatus having a manifold provided with a control valve.

In this type of hydraulic device, a hydraulic pump and an electric motor that rotationally drives the hydraulic pump are mounted on an upper plate of an oil tank that stores hydraulic oil, and the hydraulic oil stored in the oil tank is sucked by the rotational drive of the hydraulic pump. The discharged hydraulic oil is controlled by a control valve such as a directional control valve, a flow rate control valve, or a pressure control valve and supplied to the actuator, and the hydraulic oil returning from the actuator is controlled by the control valve. Reflux to the tank. And the said control valve is arrange | positioned at the manifold which stood and stood on the side of the hydraulic pump and the electric motor on the upper board of the oil tank.
Japanese Utility Model Publication No. 61-28481

  However, in such a conventional hydraulic apparatus, the control valve is disposed horizontally on the side surface of the manifold, so that the control valve does not interfere with the hydraulic pump and the electric motor. This increases the horizontal occupied area of the entire device, especially when a plurality of control valves are stacked and arranged outward in the horizontal direction. There is a problem that the increase is remarkable and the installation place of the apparatus is restricted.

  An object of the present invention is to arrange a plurality of control valves in a horizontal direction on the side surface of a manifold on an upper plate of an oil tank including an electric motor and a hydraulic pump that is rotationally driven by the electric motor. It is an object of the present invention to provide a hydraulic device that suppresses an increase in the area occupied in the horizontal direction and is less likely to be restricted by the installation location.

In order to achieve this problem, the present invention has taken the following measures. That is,
A hydraulic pump that sucks and discharges stored hydraulic oil and an electric motor that rotationally drives the hydraulic pump are mounted on an upper plate of an oil tank that stores hydraulic oil therein, and a bracket member is mounted on the upper plate of the oil tank. The bracket member has its upper part positioned above the hydraulic pump and motor, and a manifold is erected on the bracket member located above the hydraulic pump and motor. A plurality of control valves for controlling the hydraulic oil supplied to the actuator and the hydraulic oil flowing back from the actuator to the oil tank are stacked in the horizontal direction, and a plurality of control valves are stacked in the horizontal direction above the hydraulic pump and the motor. This is a hydraulic device characterized in that it is arranged so as to overlap with each other. In this case, between the bracket member and the manifold, there may be provided an oil receiver that accommodates hydraulic fluid that has leaked between the manifold and the stacked control valves or between the stacked control valves. .

  As described above in detail, according to the first aspect of the present invention, the bracket member is erected on the upper plate of the oil tank on which the hydraulic pump and the electric motor are mounted, and the bracket member is positioned above the hydraulic pump and the electric motor. A manifold is erected on the top of the cylinder, and on the side of the manifold, a plurality of control valves are stacked in the horizontal direction to control the hydraulic oil supplied from the hydraulic pump to the actuator and the hydraulic oil returned from the actuator to the oil tank. A plurality of control valves stacked in the horizontal direction are arranged above the hydraulic pump and the electric motor. Therefore, compared to the conventional device in which a manifold with a plurality of control valves stacked in a horizontal direction from the side is installed on the upper plate of the oil tank, the bracket is installed on the upper plate of the oil tank. Since the member can reduce the occupied area in the horizontal direction, an increase in the occupied area in the horizontal direction of the entire apparatus can be suppressed, and the installation place can be made less likely to be restricted.

  In addition to the effect of the invention described in claim 1, the invention described in claim 2 is provided between the bracket member and the manifold, between the manifold and the stacked control valves, or between the stacked control valves. Since the oil receiver for containing the leaked hydraulic oil is provided, the leaked hydraulic oil can be recovered well, and the hydraulic pump, the electric motor, and the oil tank can be prevented from being contaminated by the leaked hydraulic oil.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 4, reference numeral 1 denotes a tank for storing hydraulic oil therein, which is formed in a substantially rectangular parallelepiped shape having an upper opening, and the upper opening is closed by a detachable upper plate 2. Reference numeral 3 denotes an electric motor that rotationally drives the hydraulic pump 4 and is mounted and fixed on the upper plate 2 via a plurality of buffer members 5. The hydraulic pump 4 is fixed to one side of the electric motor 3 on the upper plate 2, and the stored hydraulic oil in the oil tank 1 is sucked from the suction line 4A and discharged to the discharge line 4B by the rotation of the electric motor 3. An oil level gauge 6 for visually recognizing the amount of hydraulic oil stored from the outside is disposed above one side of the oil tank 1, and a discharge port for discharging the stored hydraulic oil is detachably closed below one side of the oil tank 1. A plug member 7 is provided. Drained into the upper plate 2 of the oil tank 1 is an oil inlet / air breather 8 for injecting hydraulic oil into the oil tank 1, a plurality of hook members 9 for lifting and moving the device, and a drain of the hydraulic pump 4. A cooler 12 is provided which is introduced and cooled from the conduit 10 and returns the cooled drain to the oil tank 1 from the drain outlet conduit 11.

  Reference numeral 13 denotes a bracket member standing on the upper plate 2 of the oil tank 1 on the side of the electric motor 3, and is composed of a first side plate 13A extending in parallel with the electric motor 3 and a second side plate 13B orthogonal to the first side plate 13A. It is formed in an L shape, and its upper part is located above the hydraulic pump 4 and the electric motor 3. On the upper part of the bracket member 13, four manifolds 15 having a substantially rectangular parallelepiped shape are erected with an oil tank 14 interposed and with long sides in a vertical direction. A discharge pipe 4B is connected to the upper portion of the manifold 15 so as to introduce the hydraulic oil discharged from the hydraulic pump 4 into the interior. On one side of the manifold 15, there are four rows of the first group 16A, the second group 16B, the third group 16C, and the fourth group 16D in the vertical direction, and four control valves 17 and 18 for each of the groups 16A to 16D. , 19, 20 are sequentially stacked in the horizontal direction, and are superimposed on the hydraulic pump 4 and the electric motor 3. The control valve 17 is a throttle valve that controls the flow rate of the hydraulic oil, the control valve 18 is a pilot operated check valve that allows the flow to the actuator side (not shown) to be a free flow, and the control valve 19 is changed from the hydraulic pump 4 to an actuator (not shown). A pressure reducing valve 20 for controlling the pressure of the hydraulic oil to be supplied, and an electromagnetic direction switching valve 20 for switching the flow direction of the hydraulic oil to be supplied to an actuator (not shown). The hydraulic fluid that flows back to the oil tank is controlled.

  The oil receiver 14 interposed between the bracket member 13 and the manifold 15 is formed in a substantially box shape having an upper opening, extends in the stacking direction of the control valves 17 to 20, and extends between the manifold 15 and the control valve 17. In addition, hydraulic fluid leaking from between the plurality of stacked control valves 17, 18, 19, and 20 is accommodated. A total of eight connection ports 21A and 21B are opened in each of the groups 16A to 16D on the two side surfaces orthogonal to the one side surface where the control valves 17 to 20 of the manifold 15 are stacked, and the connection ports 21A and 21B are opened. Can be connected to an actuator (not shown) by piping. Three side surfaces opposite to the two side surfaces where the connection ports 21A and 21B are opened orthogonal to one side surface where the control valves 17 to 20 of the manifold 15 are stacked correspond to the connection ports 21A and 21B of the groups 16A to 16D. A total of eight pressure switches 22A and 22B are provided for each two, and a signal is generated when the pressure of hydraulic oil supplied to an actuator (not shown) reaches a set pressure. Reference numeral 23 denotes a return conduit for returning the working oil from an actuator (not shown) to the oil tank 1, and a lower part of the manifold 15 at an inward position from the horizontal front ends of the first side plate 13A and the second side plate 13B orthogonal to the bracket member 13. Further, it hangs down and penetrates the upper plate 2 so that its tip is immersed in stored hydraulic oil inside the oil tank 1.

Next, the operation of this configuration will be described.
When the connection ports 21A and 21B of the groups 16A to 16D are connected to an actuator (not shown) and the hydraulic pump 4 is rotationally driven by the electric motor 3, the hydraulic pump 4 sucks the hydraulic oil stored in the oil tank 1 from the suction pipe 4A. The discharged hydraulic fluid flows through the inside of the manifold 15 and is controlled by the control valves 17 to 20 of the groups 16A to 16D to be supplied to an actuator (not shown) from the control port 21A or 21B. The return oil from the actuator flows through the control port 21B or 21A and is controlled by the control valves 17 to 20 of the groups 16A to 16D, flows inside the manifold 15 and returns to the oil tank 1 from the return line 23. At this time, the pressure switch 22A or 22B generates a signal when the pressure of hydraulic oil supplied to an actuator (not shown) reaches a set pressure.

  With this operation, the bracket member 13 is erected on the upper plate 2 of the oil tank 1 on which the hydraulic pump 4 and the electric motor 3 are mounted, and the manifold is formed above the bracket member 13 located above the hydraulic pump 4 and the electric motor 3. 15, and a plurality of control valves 17 to 20 for controlling the hydraulic oil supplied from the hydraulic pump 4 to the actuator and the hydraulic oil returning from the actuator to the oil tank 1 are horizontally arranged on the side surface of the manifold 15. The control valves 17 to 20 which are stacked and stacked in the horizontal direction are arranged above the hydraulic pump 4 and the electric motor 3 so as to overlap each other. For this reason, a manifold in which a plurality of control valves are stacked in a horizontal direction from the side surface is erected on the upper plate 2 of the oil tank 1 as compared with a conventional device in which the manifold is erected on the upper plate of the oil tank. Since the bracket member 13 can reduce the occupied area in the horizontal direction, an increase in the occupied area in the horizontal direction of the entire apparatus can be suppressed, and the installation place can be hardly restricted.

  Further, between the bracket member 13 and the manifold 15, an oil receiver 14 that stores hydraulic fluid leaked between the manifold 15 and the stacked control valves 17 or between the stacked control valves 17, 18, 19, 20. Therefore, the leaked hydraulic oil can be recovered satisfactorily, and the hydraulic pump 4, the electric motor 3, and the upper plate 2 of the oil tank 1 can be prevented from being contaminated by the leaked hydraulic oil. In addition, since a plurality of control valves 17 to 20 are stacked in the horizontal direction in four rows from the first group 16A to the fourth group 16D in the vertical direction on the side surface of the upright manifold 15, four manifolds 15 are provided. Even if the number of rows is increased to 5 or 6 and the number of rows increases to 5 or 6 rows, an increase in the horizontal occupied area can be prevented. It can be applied to a wide range of uses without increasing.

5 and 6 show another embodiment of the present invention. The same portions as those of the embodiment are denoted by the same reference numerals, the description thereof is omitted, and only different portions will be described.
The oil tank 1A is formed in a substantially rectangular parallelepiped shape with a short capacity by making the long side shorter than the oil tank 1 of one embodiment, and the long side dimension of the upper plate 2 is longer than the long side dimension of the oil tank 1A. The discharge flow path 4B of the hydraulic pump 4 extends upward along the bracket member 13 and is connected to the lower portion of the manifold 15A. The manifold 15A is a triple manifold composed of three rows of a first group 16A, a second group 16B, and a third group 16C. The first group 16A sequentially includes a throttle valve 17, a pilot operated check valve 18, and an electromagnetic direction switching valve 20. The second group 16B is stacked with control valves 17, 18, 19, and 20 in the same manner as in the embodiment, and the third group 16C is stacked with a throttle valve 17 and an electromagnetic directional switching valve 20. Yes. A total of three pressure switches 22B and plugs 24A are arranged on each of the two side surfaces of the manifold 15A, one for each group 16A to 16C. Further, on three side surfaces (not shown) facing the two side surfaces of the manifold 15A, connection ports that can be connected to the actuators by piping are opened. A plate-like member 25 in which pneumatic devices such as an electromagnetic valve 26, a regulator 27, and an air check sensor 28 are disposed is detachably attached to the upper portion of the manifold 15A.

  And like one embodiment, since the bracket member 13 erected on the upper plate 2 of the oil tank 1A can reduce the occupied area in the horizontal direction, the increase in the occupied area in the horizontal direction of the entire apparatus is suppressed, It is difficult to be restricted by the installation location. Moreover, since the hydraulic oil leaked between the manifold 15A and the stacked control valves 17 or between the stacked control valves 17, 18, 19, 20 is accommodated by the oil receiver 14, the leaked hydraulic oil is satisfactorily improved. The oil can be recovered without contaminating the hydraulic pump 4, the electric motor 3, and the upper plate 2 of the oil tank 1A with the leaked hydraulic oil. Further, it can be applied to a wide range of applications without increasing the horizontal occupation area of the entire apparatus due to the change of the manifold 15A. Further, since the plate-like member 25 having the pneumatic device disposed on the upper portion of the manifold 15A is detachably attached, the upper space of the manifold 15A can be effectively utilized.

  In each of the above-described embodiments, the hydraulic pump 4 is fixed to one side surface of the electric motor 3, but the hydraulic pump may be mounted and fixed on the upper plate of the oil tank. Further, the oil receiver 14 interposed between the bracket member 13 and the manifolds 15 and 15A is appropriately provided as necessary and may be omitted.

1 is a front view of a hydraulic apparatus showing an embodiment of the present invention. It is a rear view of FIG. It is a right view of FIG. It is a top view of FIG. It is a front view of the hydraulic device which showed other embodiment of this invention. FIG. 6 is a right side view of FIG. 5.

Explanation of symbols

1, 1A: Oil tank 2: Upper plate 3: Electric motor 4: Hydraulic pump 13: Bracket member 14: Oil receiver 15, 15A: Manifold 17, 18, 19, 20: Control valve

Claims (2)

  A hydraulic pump that sucks and discharges stored hydraulic oil and an electric motor that rotationally drives the hydraulic pump are mounted on an upper plate of an oil tank that stores hydraulic oil therein, and a bracket member is mounted on the upper plate of the oil tank. The bracket member has its upper part positioned above the hydraulic pump and motor, and a manifold is erected on the bracket member located above the hydraulic pump and motor. A plurality of control valves for controlling the hydraulic oil supplied to the actuator and the hydraulic oil flowing back from the actuator to the oil tank are stacked in the horizontal direction, and a plurality of control valves are stacked in the horizontal direction above the hydraulic pump and the motor. A hydraulic device characterized by being arranged so as to be superimposed on.   An oil receiver is provided between the bracket member and the manifold to store hydraulic oil leaked between the manifold and the stacked control valves or between the stacked control valves. Item 2. The hydraulic device according to Item 1.

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