JP2943093B2 - Hydraulic pump mounting structure for hydraulic oil tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic pump mounting structure for a hydraulic oil tank mounted on the body of an industrial vehicle such as a forklift truck.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 1, a hydraulic pump mounting structure of a hydraulic oil tank mounted on a vehicle body side 1 of an industrial vehicle has an upper surface 3 of a hydraulic oil tank 2 containing oil therein.
An opening 3a is formed in the opening 3, and a flange 4 is fixed to the opening 3a. The flange 4 has a through hole 5 in the vertical direction.
a, the upper flange portion 6 formed at the upper end of the cylindrical body portion 5, and the lower flange portion 7 formed at the lower end of the cylindrical body portion 5. Is the upper surface 3 of the hydraulic oil tank 2
Of the hydraulic oil tank 2 so as to cover the opening 3a
It is designed to be adhered to. A motor 8 is fixed to the upper part of the upper flange 6 of the flange 4 and
A hydraulic pump 9 is fixed below the lower flange 7 of the flange 4 so as to be disposed in the hydraulic oil tank 2. The output portion 8a of the motor 8 has an axial joint 10
The joint 10 is arranged in a through hole 5 a of the cylindrical body 5 of the flange 4, and the lower side thereof is fixed to the input shaft 9 a of the hydraulic pump 9. Then, the upper surface 3 of the hydraulic oil tank 2 and the flange 4
The gasket 11 is interposed between the upper flange 6 and the upper collar 6, and the gasket 11 is interposed between the motor 8 and the upper collar 6 of the flange 4. Alternatively, entry of oil into the motor 8 is prevented.

[0003]

In a conventional hydraulic pump mounting structure for a hydraulic oil tank, a flange and a joint are provided between the motor and the hydraulic pump, and the flange and the joint are arranged in the hydraulic oil tank. Therefore, the hydraulic oil tank has a problem that a space for arranging the flange and the joint must be provided inside, and the whole becomes large. In addition, the number of parts increases during these assembling and assembling operations, so that the number of working steps increases, and there is a problem that the operation is troublesome. An object of the present invention is to solve these problems.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is fixed to an industrial vehicle body side and has an open upper surface.
In the hydraulic oil tank that, an opening on the upper surface of the opening
A detachable upper surface body is provided, and is provided above the upper surface body.
A motor is fixed so that the rotation output shaft faces downward and the opening is completely closed, and the opening is passed through the lower part of the motor.
Connecting fixing the hydraulic pump disposed in the hydraulic oil tank Te
With the surface of the motor that is fixed to the upper body and the motor.
Of the motor and the surface fixed to the hydraulic pump on the same plane
Placed between the motor and upper body, and the motor and hydraulic pump
A flat seal plate is interposed between and .

[0005]

[Function] Since only the hydraulic pump is disposed in the hydraulic oil tank while preventing oil leakage from the hydraulic oil tank or oil from entering the motor with the seal plate, it is possible to prevent the hydraulic oil tank from being enlarged. In addition, since the hydraulic pump is directly fixed to the motor via the seal plate, the number of parts can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a hydraulic pump mounting structure for a hydraulic oil tank according to the present invention will be described. As shown in FIG. 2, a hydraulic oil tank 21 in which oil is stored inside a vehicle body side 20 of an industrial vehicle.
Is fixed by welding. The hydraulic oil tank 21 is made of top member 23 as a box body 22 for opening the upper surface and freely and can contact detachably to the upper surface to form a top surface 23 circularly-shaped opening 23a. And the upper surface of the hydraulic oil tank 21
The motor 24 serving as a greater diameter than the outer diameter of this opening 23a so as to cover the opening 23a in the body 23, i.e. opening
The motor 24 is formed with a ventilation hole 24a at the lower part and a concave output part 24b which is a downward rotation output shaft. I have. A hydraulic pump 26 is connected and fixed to the lower portion of the motor 24 with bolts 27, and the convex input shaft 26a of the hydraulic pump 26 is directly fixed to the output portion 24b of the motor 24. .
The hydraulic pump 26 is provided with a suction pipe 28 and a discharge pipe 29, respectively.
The tip of the 8 oil of the hydraulic oil tank 21 to secure the suction filter 30 with inhalation by a hydraulic pump 26, the upper surface member 2 of the hydraulic oil tank 21 to the discharge pipe 29
3 so as to protrude outside, so that the sucked oil is discharged to the outside.

On the other hand, in the motor 24,
And the hydraulic pump 26
And the lower surface of the motor 24 (the hydraulic pump ) between the lower end of the motor 24 (the surface to be fixed to the upper body 23) and the upper body 23 of the hydraulic oil tank 21.
During fixing surface to flop 26) and the upper end of the hydraulic pump 26 Toniwa
Standing by the opening 23a of the upper surface 23 of the hydraulic oil tank 21
Is interposed between the seal plate 31 and the seal plate 31 that seals the seal. As shown in FIG. 3, the seal plate 31 is a flat plate having a thickness substantially equal to the outer periphery of the motor 24 and having a small thickness, and a liquid packing material 32 is applied to both surfaces thereof. A bolt 25 for fixing the oil tank 21 and the motor 24,
A bolt 27 for fixing the motor 24 and the hydraulic pump 26,
While forming the hole part 33 which can penetrate each,
Hole 34 for attaching hydraulic pump 26 to motor 24
Is formed. By interposing the seal plate 31 in this manner, oil leakage from the opening 23a of the hydraulic oil tank 21 is eliminated.

With such a structure, only the hydraulic pump 26 is disposed in the hydraulic oil tank 21 while preventing the oil leakage from the hydraulic oil tank 21 or the intrusion of oil into the motor 24 by the seal plate 31. So the hydraulic oil tank 21
Can be prevented from increasing in size, and the size can be reduced to the minimum required. Also, since the seal plate 31 used as a mere flat plate, it no weight, etc. increases here, deer
Also, in the motor 24, the motor 24 is fixed to the upper body 23.
Surface and the surface fixed to the hydraulic pump 26 are arranged on the same plane.
The height dimension when attaching the motor 24
Therefore, the size of the hydraulic oil tank 21 can be prevented from increasing. Further, by eliminating parts such as the conventional flanges and joints, the number of parts can be reduced, and the number of work steps in assembling and assembling work can be reduced, thereby improving workability.

The procedure for assembling these parts is as follows.
Is removed, and a motor 24 is fixed to the upper surface 23 with a seal plate 31 interposed therebetween.
6 is fixed with a seal plate 31 interposed therebetween. Then, a discharge pipe 29 provided in the hydraulic pump 26 is provided so as to protrude from the upper surface 23, and components are assembled on the upper surface 23 of the hydraulic oil tank 21. After assembling, the upper surface 23 on which the parts are assembled is brought into close contact with the box 22. This facilitates attachment of each component, particularly attachment of the discharge pipe 29.

[0010]

According to the present invention, oil leakage from the hydraulic oil tank
Alternatively, since only the hydraulic pump is arranged in the hydraulic oil tank while preventing the oil from entering the motor with the seal plate,
It is possible to prevent the hydraulic oil tank from becoming large and to minimize the size of the hydraulic oil tank, and to use a simple flat plate for the seal plate . For the surface fixed to the top body and the motor
And the surface fixed to the hydraulic pump in the same plane
As a result, the height when mounting the motor is reduced.
The size of the area around the hydraulic oil tank can be prevented. Thus, the entire hydraulic oil tank and its periphery can be made simple and compact. In addition, the number of components can be reduced by eliminating the conventional components such as flanges and joints, and the number of man-hours in assembling and assembling operations can be reduced, thereby improving workability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a conventional hydraulic pump mounting structure for a hydraulic oil tank.

FIG. 2 is a longitudinal sectional view showing a hydraulic pump mounting structure for a hydraulic oil tank according to the present invention.

FIG. 3 (a) is a plan view showing a seal plate according to the present invention. (B) It is a side view which shows the seal plate by this invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body side, 2 ... Hydraulic oil tank, 3 ... Upper surface, 3a ... Opening, 4 ... Flange, 5 ... Cylindrical body, 5a ... Through hole, 6 ... Upper collar, 7 ... Lower collar, 8 ... Motor , 8a ... output unit, 9
... Hydraulic pump, 9a ... Input shaft, 10 ... Joint, 11
... gasket, 20 ... body side, 21 ... hydraulic oil tank, 2
2 ... box body , 23 ... top body , 23a ... opening, 24 ... motor, 24a ... ventilation hole, 24b ... output part, 25 ... bolt,
26: hydraulic pump, 26a: input shaft, 27: bolt, 2
Reference numeral 8: suction pipe, 29: discharge pipe, 30: suction filter, 31: seal plate, 32: liquid packing material, 3
3 ... hole, 34 ... hole.

Claims (1)

(57) [Claims] 1. An upper surface of an industrial vehicle fixed to a vehicle body side 20.
In the hydraulic oil tank 21 open to, set an upper body 23 to be detachable with an opening 23a on the upper surface of the opening
With the rotary output shaft directed downward above the upper body 23.
A motor 24 is fixed so as to completely cover the opening 23a , and a hydraulic pump 26 disposed in the hydraulic oil tank 21 through the opening 23a is connected and fixed to a lower portion of the motor 24.
To the upper body 23 of the motor 24
To the hydraulic pump 26 in the motor 24
The fixing surface and the motor 24 are arranged on the same plane.
23 and between the motor 24 and the hydraulic pump 26.
A hydraulic pump mounting structure for a hydraulic oil tank, wherein a seal plate 31 having a flat plate shape is interposed.