JP2001241401A - Hydraulic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic device capable of reducing dimensions and of preventing fluid leakages. SOLUTION: This device is provided with a tank 4, a hydraulic pump 3 and a motor 2 driving the hydraulic pump 3 in one body and is mounted on a standing up mounting surface 12 provided on a vehicle or the like with facing a longitudinal side surface of the tank 4. An opening part 4A is provided on a side surface of the tank 4 and is sealed by a cover 11. The tank 4 is mounted on the standing up mounting surface 12 through the cover 11. Close adhesion of the cover 11 to the opening part 4a, thereby is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic device called a hydraulic package which is suitably used for a carrier driving device or the like mounted on an industrial vehicle or the like.

[0002]

2. Description of the Related Art A hydraulic device of this type can easily generate hydraulic pressure only by supplying electric power, has a high degree of freedom in installation location, and can be provided near an actuator to shorten a hydraulic pipe as much as possible. Therefore, it is suitably used for driving a hydraulic actuator of an industrial vehicle or the like. An electric motor and a hydraulic pump (not shown) are arranged in an area surrounded by an L-shaped tank composed of lower tanks 21 and 27 and side tanks 20 and 25 as shown in FIGS. Are known.

[0003]

However, FIG. 6 and FIG.
Since the height of the lower tanks 21 and 27 is high, it is difficult to use a low floor vehicle with a low vehicle height. When the hydraulic device is mounted on the vehicle via the side tanks 20 and 25, a jig such as a bolt for fixing the lower tank 21 and the side tank 20 and a lid 26 provided on the lower surface are connected to the lower tank 27. A jig such as a bolt fixed to the vehicle may be easily loosened by vertical vibration of the vehicle, which may cause oil leakage. In addition, the lower tank 21 and the lid 26 are
The tank is detachable from the tank body 27 because maintenance such as replacement of a filter of an oil suction port in piping (not shown) provided inside the tank is required.

[0004] In view of the above, it is an object of the present invention to provide a hydraulic device capable of reducing the length of a tank in the vertical direction and preventing oil leakage due to loosening of a connecting portion of the tank.

[0005]

According to the present invention, there is provided a hydraulic apparatus comprising a tank having an opening provided in a tank body closed by a lid, a hydraulic pump, and an electric motor for driving the hydraulic pump. The tank is mounted on an upright mounting surface provided on a vehicle or the like so that the longitudinal side surface of the tank faces. The tank has an opening on the side surface, and the opening is provided with a lid. Since the tank is closed by the body and the tank is mounted on the upright mounting surface via the lid, the adhesion between the lid and the opening is improved.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a hydraulic device 10 of this embodiment integrally includes a rectangular parallelepiped tank 4, a hydraulic pump 3 provided on one side of the tank 4, and an electric motor 2 for driving the same. For example, it can be mounted on an upright mounting surface 12 provided on an upright mounting wall K which is a part of a chassis of a tailgate car C as an industrial vehicle. In this embodiment, the tail gate TG is used for driving.

As shown in FIG. 2 and FIG. 3, the hydraulic device 10 comprises a tank 4 containing hydraulic oil therein, a lid 11 for closing an opening 4a of the tank 4, and internal components together with the tank 4. And the internal components thereof.

The internal components are mainly a motor 2 and
The hydraulic pump 3 includes a hydraulic pump 3 driven by the electric motor 2 and supplied with hydraulic oil from a tank 4 through a pipe 7, and a valve block 8 that guides hydraulic oil sent from the hydraulic pump to the outside. The hydraulic oil guided to the outside is sent to, for example, a cylinder L which is an external load, as shown in FIG. Then, the hydraulic oil returns from the cylinder L to the tank 4 through the pipe 9.

The tank 4 is a space for storing hydraulic oil on the side, and a base 13 which projects laterally is provided at the bottom of the tank 4.
The lower tank, which was conventionally configured, has been removed, merely functioning as a base for mounting internal components. As a further characteristic configuration, a detachable lid 11 is provided on the side surface, and maintenance such as replacement of an oil filter provided at an oil supply port of the pipe 7 led into the tank is performed.

Then, the lid 1 is placed on the opening 4a of the tank 4.
As shown in FIG. 5, a plurality of bolts 51 are used to fix the opening 4a of the tank 4 and the lid 11 with the plurality of bolts 51 and to fix the tank 4 to the upright mounting surface 12 of the vehicle. 52 also has a function of fixing the opening 4a of the tank 4 and the lid 11, and the opening 4a of the tank 4
a and the fixing of the lid 11 is strengthened. Further, since the vehicle is fixed by bolts along the lateral direction, loosening of the fixing portion is reduced with respect to vertical vibration which is likely to occur during the movement of the vehicle.

The pump 3 is mounted on the bottom surface of the tank 4 through the boss 5 and the vibration isolating rubber 6, so that the vibration of the motor 2 can be reduced by the vibration isolating rubber 6 without being transmitted to the tank 4.

An electric motor 2 is arranged above the pump 3, and a valve block 8 is attached to a side of the pump 3. The tank 4 is connected by a pipe 7 using a space beside the pump.

FIG. 4 shows a hydraulic circuit diagram of the present embodiment. The valve block 8 mainly includes a solenoid valve 81, a return flow controller 82, a relief valve 83, a check valve 84.
Consists of

When the pump 3 is driven by the electric motor 2 to discharge the hydraulic oil, the hydraulic oil is sent to the cylinder L through the check valve 84. When the solenoid valve 81 is energized, hydraulic oil from the cylinder L returns to the tank 4 through the return flow controller 82 and the pipe 9. Return Flocon 8
Numeral 2 controls the flow rate of hydraulic oil. The relief valve 83 supplies the hydraulic oil to the tank 4 when the pressure of the circuit exceeds a predetermined pressure.
, The normal operation of the hydraulic device is performed.

[0015]

As described above, according to the hydraulic apparatus of the present invention, since the lower tank is removed, the vertical dimension can be shortened. For example, the hydraulic apparatus can be used in a low-floor vehicle having a low vehicle height. It has become possible. In addition, since the opening of the tank is provided on the side, the lid loosens less against vertical vibration of the vehicle,
In addition, since the lid is fixed to the tank using a fixing jig to the upright mounting surface of the tank, the fixing of the lid is strengthened.

[Brief description of the drawings]

FIG. 1 is a diagram showing a method for mounting a hydraulic device of the present invention to a vehicle.

FIG. 2 is a front view of the hydraulic device of the present invention.

FIG. 3 is a plan view of the hydraulic device of the present invention.

FIG. 4 is a hydraulic circuit diagram of the hydraulic device of the present invention.

FIG. 5 is an enlarged view of a tank of the hydraulic device of the present invention.

FIG. 6 is a view showing an L-shaped tank (1) of a conventional hydraulic device.

FIG. 7 is a view showing an L-shaped tank (2) of a conventional hydraulic device.

[Explanation of symbols]

 2 Electric motor 3 Hydraulic pump 4 Tank 4a Opening 11 Lid 12 Standing mounting surface

Claims (1)

[Claims] 1. A tank having an opening provided in a tank body closed by a lid, a hydraulic pump, and an electric motor for driving the hydraulic pump, which are at least integrated with each other. The tank is attached to a mounting surface such that a longitudinal side surface of the tank faces, and the tank is provided with the opening on the side surface, and the lid is closed while closing the opening with the lid. A hydraulic device, wherein the tank is configured to be mounted on the upright mounting surface via a hydraulic pump.