JP2000314151A - Sluing working-vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute the upper surface of a hydraulic fluid tank widely, to mount and insert a suction filter and a return filter to be arranged in the hydraulic fluid tank into the hydraulic fluid tank from the upper surface of the tank, to improve maintainability, to secure not only a space above a hydraulic pump but also a space above an engine as the capacity of the tank, and to obtain a sufficient capacity of the hydraulic fluid tank. SOLUTION: An engine 21 and hydraulic fluid tank 25 for hydraulic equipment are arranged in a hood 14 in the rear of a sluing body 2. In this case, the tank 25 is arranged above the engine 21 and a hydraulic pump 22 attached to the engine 21 to extend the tank 25 to the side of the engine 21 in such a way that the tank 25 is overlapped with the engine 21 by the size D when viewed in a plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning work vehicle equipped with a working machine such as a backhoe, and more particularly to a structure of a hydraulic oil tank for hydraulic equipment disposed in a hood of the turning work vehicle.

[0002]

2. Description of the Related Art Conventionally, in a turning work vehicle equipped with a working machine such as a backhoe, a bonnet is arranged at a rear portion of a revolving structure, and a working oil for storing a working oil for an engine or hydraulic equipment in the hood. A tank was installed. The engine is provided with a hydraulic pump, and the hydraulic pump is connected to a suction filter provided in the hydraulic oil tank by a hydraulic pipe, and the hydraulic oil stored in the hydraulic oil tank is supplied to the suction filter and the hydraulic pump. The hydraulic pump was supplied through a pipe. Further, a return filter is provided in the hydraulic oil tank, and the hydraulic oil from each hydraulic device is returned to the hydraulic oil tank through the return filter. The hood is configured so that the interior is opened and maintenance of the device is performed by rotating the rear end of the bonnet around the front portion upward. As shown in FIG. 7, a hydraulic oil tank 103 is provided with a hydraulic pump 1 attached to a flywheel case 101a of the engine 101.
02. Then, as shown in FIG. 8, the return filter 105 provided in the hydraulic oil tank 103 was inserted into the hydraulic oil tank 103 from the upper surface of the hydraulic oil tank 103.

[0003]

However, in the turning work vehicle constructed as described above, the hydraulic pipe connecting the hydraulic pump and the suction filter in the hydraulic oil tank is provided on the front side of the bonnet, for example, ahead of the engine. When the bonnet was opened from the rear end, the hydraulic piping was inaccessible and maintenance was poor. Also,
The hydraulic oil tank is located above the hydraulic pump attached to the engine, but the space above the hydraulic pump is not large, so the area of the hydraulic oil tank upper surface is small, and the return filter and the suction filter are connected to the hydraulic oil tank. They could not be installed from the top, and their maintenance was poor. Further, when the hydraulic oil tank is disposed above the hydraulic pump, the pump port of the hydraulic pump projects upward from the upper end of the pump body, so that the vertical dimension of the hydraulic oil tank is reduced by the amount of the pump port, It was difficult to secure sufficient capacity of the hydraulic oil tank. Further, as shown in FIG.
05 is the hydraulic oil tank 1 from the upper surface of the hydraulic oil tank 103.
03, the return filter 105
Filter portion 105a extends downward from the upper surface of the hydraulic oil tank, so that the entire filter portion 105a is not immersed in the hydraulic oil, and the filter portion 105a
Was to be arranged. As a result, air is likely to be mixed into the hydraulic oil, causing the hydraulic pump to generate a loud noise due to air biting or the like, or to cause an abnormality in each hydraulic device.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, according to claim 1, a boom rotatably attached to a revolving body configured to be pivotable, an arm rotatably attached to the boom, and a work attachment rotatably attached to the arm. A working machine having a working machine having a hydraulic oil tank for an engine and a hydraulic device disposed in a bonnet at a rear portion of the swiveling body, wherein the hydraulic oil is provided above the engine and a hydraulic pump attached to the engine. A tank was arranged, the hydraulic oil tank was extended toward the engine, and the hydraulic oil tank and the engine were overlapped in a plan view.

According to a second aspect of the present invention, a hydraulic piping connecting the suction filter provided in the hydraulic oil tank to the hydraulic pump is disposed near an opening of the bonnet.

According to a third aspect of the present invention, a return filter is provided in the hydraulic oil tank, and a filter portion disposed in the hydraulic oil tank and a mounting portion for mounting and fixing the filter portion to the hydraulic oil tank. Composed by
The mounting portion and the filter portion were connected by a tubular member, and the entire filter portion was immersed in hydraulic oil.

In the present invention, the upper end of the pump port protruding from the outer peripheral portion of the pump main body of the hydraulic pump is disposed below the upper end of the pump main body.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. 1 is an overall side view showing the turning work vehicle of the present invention, FIG. 2 is a plan view showing the inside of the hood, FIG. 3 is a rear view thereof, FIG. 4 is a side view thereof, and FIG. 5 is a perspective view showing a return filter. 6 is a side view showing the return filter similarly attached to the hydraulic oil tank,
FIG. 7 is a rear view showing an arrangement position of a conventional hydraulic oil tank, and FIG. 8 is a side view showing a return filter attached to the conventional hydraulic oil tank.

First, the configuration of the turning work vehicle of the present invention will be described. In FIG. 1, the turning work vehicle supports a revolving unit 2 at the upper center of the crawler type traveling device 1 so as to be able to turn left and right. Arranged freely. A hood 14 for covering an engine or the like is provided above the revolving superstructure 2, and a seat 16 is attached above the hood 14. A lever guide 19 is provided in front of the seat 16.
Is provided with a driving operation unit 15 configured by disposing levers for performing driving operation and the like. A step 20 is arranged between the lever guide 19 of the operation section 15 and the hood 14.

A counterweight 17 is attached to the rear end of the revolving unit 2, and a canopy support member 18 is provided upright on the counterweight 17. Then, the canopy 8 covering the driving operation unit 15 and the seat 16 from above.
Are removably attached to the canopy support member 18. The bonnet 14 is configured such that its rear end can be vertically rotated about a front rotation center 14a, and the hood 14 is turned upward with the rear end of the hood 14 to open the inside of the hood 14. I am trying to do it.

A boom bracket 12 is attached to the front end of the swing body 2 so as to be rotatable left and right, and the lower end of the boom 6 is supported by the boom bracket 12 so as to be vertically rotatable. The boom 6 is bent forward at an intermediate portion, and is formed in a substantially “C” shape having a bent portion 6 d in a side view. The arm 5 is rotatably supported at the upper end of the boom 6, A bucket 4 as a work attachment is rotatably supported at the tip of the arm 5. A working machine 7 is configured by the boom 6, the arm 5, the bucket 4, and the like.

The boom 6 is connected to the boom cylinder 1
1, the arm 5 is rotated by the arm cylinder 10
The bucket 4 is rotated by the
Is rotated. The boom cylinder 11, the arm cylinder 10, and the bucket cylinder 9 are configured as hydraulic cylinders.
The hydraulic pump is disposed in the hood 4 and supplies hydraulic oil through a hydraulic hose to be driven to expand and contract. The boom cylinder 11 is connected to the boom bracket 12
The arm cylinder 10 is interposed between the cylinder support portion 12b of the boom 6 and a boom cylinder bracket 36 provided on the front of the middle of the boom 6, and the arm cylinder 10 is provided with an arm cylinder bottom bracket 31 and an arm 5 provided on the back of the middle of the boom 6.
The bucket cylinder 9 is interposed between the bucket cylinder bracket 30 and the bucket bracket 29 connected to the bucket 4.

Next, the configuration inside the hood 14 will be described. As shown in FIG. 2 to FIG.
An engine 21 is installed in the inside, and a flywheel 21a attached to the engine 21 is horizontally installed in a substantially right and left direction so as to be arranged on one side on the left and right sides. A hydraulic pump 22 is attached to an end of the engine 21 on the side of a flywheel case 21 a that houses a flywheel, and the hydraulic pump 22 is driven by a crankshaft (output shaft) of the engine 21. In the bonnet 14, a hydraulic oil tank 25 for storing hydraulic oil for hydraulic equipment is provided.
The hydraulic oil tank 25 is disposed above the hydraulic pump 22, and the engine 21 side of the hydraulic oil tank 25 extends to above the flywheel case 21a. That is, the hydraulic oil tank 25 is moved from above the hydraulic pump 22 to the engine 21.
The hydraulic oil tank 25 and the engine 21 overlap each other by a dimension D. As described above, the hydraulic oil tank 25 is disposed not only above the hydraulic pump 22 but also above the flywheel case 21a to increase the capacity of the hydraulic oil tank 25 and increase the area of the upper surface of the hydraulic oil tank 25. Is secured.

In the hydraulic oil tank 25, a suction filter 26 and a return filter 27 are provided. The suction filter 26 includes a filter part 26b and a mounting part 2.
6a, and is inserted into the hydraulic oil tank 25 from the upper surface. The entire filter part 26b is immersed in the hydraulic oil stored in the hydraulic oil tank 25, and the mounting part 26a is mounted and fixed on the upper surface of the hydraulic oil tank 25 to support the filter part 26b. .

A hydraulic oil supply pipe 32 extends from the lower surface of the filter portion 26b.
4 is connected to the hydraulic pump 22. And
The hydraulic oil in the hydraulic oil tank 25 is supplied to the suction filter 2
6. The hydraulic pump 22 is supplied to the hydraulic pump 22 through the hydraulic oil supply pipe 32 and the hydraulic hose 34. Filter part 2
The hydraulic oil supply pipe 32 extending from 6b is extended to the outside from the rear end of the side surface of the hydraulic oil tank 25 on the engine 21 side after being piped into the hydraulic oil tank 25 to an intermediate portion. The hydraulic oil supply pipe 32 extended to the outside is the bonnet 1
4 is connected to the rear end of the hydraulic hose 3
4 is connected to one end. The hydraulic hose 34 is also piped to the rear end of the bonnet 14, and the other end is connected to the hydraulic pump 22 below the hydraulic oil tank 25.

As described above, the hydraulic oil supply pipe 32 and the hydraulic hose 34, which are hydraulic pipes connecting the suction filter 26 and the hydraulic pump 22, are connected to the rear end of the bonnet 14,
That is, by piping the vicinity of the opening of the bonnet 14, it is possible to improve the workability when the bonnet 14 is opened and the maintenance and the piping work / replacement work of the hydraulic oil supply pipe 32 and the hydraulic hose 34 are performed.

On the other hand, the return filter 27 is composed of a filter portion 27b and a mounting portion 27a which are connected to each other by a tubular member 27c, as shown in FIGS. Has been inserted. The filter part 27b is entirely composed of the hydraulic oil tank 2
5 is immersed in the hydraulic oil stored in the
7a is mounted and fixed on the upper surface of the hydraulic oil tank 25 and supports the filter 27b. And the hydraulic oil tank 25
Hydraulic oil returned to the inside is supplied from the mounting portion 27a to the tubular member 27.
c and the filter portion 27b so as to return to the inside of the hydraulic oil tank 25.

The return filter 27 includes a filter unit 27
If a part of b is raised above the oil level, air is mixed into the hydraulic oil when the hydraulic oil is returned to the hydraulic oil tank 25 through the return filter 27, thereby generating noise of the hydraulic pump and hydraulic equipment. Cause an abnormality in Therefore, in the present return filter 27, the filter part 27b and the mounting part 27a are connected by a tubular member 27c having a fixed length, and the return filter 27 is inserted from the upper surface of the hydraulic oil tank 25. Also, the filter portion 27b is located below the oil level so that the whole is immersed in the hydraulic oil. As a result, air does not mix with the hydraulic oil returned into the hydraulic oil tank 25, and it is possible to prevent the occurrence of noise from the hydraulic pump and the occurrence of abnormalities in the hydraulic equipment.

The hydraulic oil tank 25 is provided with the hydraulic pump 2
2 as well as above the flywheel case 21a of the engine 21, the upper surface of the hydraulic oil tank 25 can be made wider, and both the suction filter 26 and the return filter 27 can be used. Can be inserted into the inside from the upper surface of the hydraulic oil tank 25 and attached. Thus, when the rear end of the bonnet 14 is pivoted upward to perform maintenance or the like inside the bonnet 14, it is possible to easily attach and detach the suction filter 26 and the return filter 27.
Further, the suction filter 26 and the return filter 2
When the filters 26 and 27 are to be maintained when the filter 7 is attached from the side of the hydraulic oil tank 25, it is necessary to remove the filters 26 and 27 after extracting the hydraulic oil from the hydraulic oil tank 25 once. The hydraulic oil tank 25
Even if the hydraulic oil is stored in the filter 26/27
Can be attached and detached, so that maintainability can be improved. Further, the capacity of the hydraulic oil tank 25 can be ensured not only in the space above the hydraulic pump 22 but also in the space above the flywheel 21a, so that the capacity of the hydraulic oil tank 25 can be sufficiently obtained.

Also, as shown in FIG.
Is formed with a pump port 22a for sending hydraulic oil to a control valve and each hydraulic device, and the pump port 22a protrudes outward from an outer peripheral portion of the pump body 22b. The hydraulic pump 22 is attached to the engine 21 such that the upper end of the pump port 22a is located below the upper end of the pump body 22b. By attaching the hydraulic pump 22 in such a posture, the lower end of the hydraulic oil tank 25 disposed above the hydraulic pump 22 can be extended downward to just below the upper end of the pump main body 22b. Thereby, the capacity of the hydraulic oil tank can be configured to be larger than when the hydraulic pump 22 is mounted so that the pump port 22a projects upward from the upper end of the pump body 22b, and the necessary capacity is sufficiently secured. It is possible to do.

[0021]

As described above, the present invention has the following advantages. That is, as in claim 1,
The hydraulic oil tank is arranged above the hydraulic pump attached to the engine, and the hydraulic oil tank is extended to the engine side so that the hydraulic oil tank and the engine overlap in a plan view. , The suction filter and the return filter provided in the hydraulic oil tank can be inserted from the upper surface of the hydraulic oil tank and attached. This makes it easy to attach and remove the suction filter and the return filter when performing maintenance or the like inside the hood. In addition, when performing the maintenance of the suction filter and the return filter, the filter can be attached and detached even while the hydraulic oil is stored in the hydraulic oil tank, so that the maintainability can be improved. Further, the capacity of the hydraulic oil tank can be secured not only in the space above the hydraulic pump but also in the space above the engine, so that the capacity of the hydraulic oil tank can be sufficiently obtained.

Further, since the pipeline of the hydraulic pipe connecting the suction filter provided in the hydraulic oil tank and the hydraulic pump is disposed near the opening of the bonnet, the bonnet is opened and the suction is carried out. When performing piping work, replacement work, and maintenance of hydraulic piping connecting the filter and the hydraulic pump, workability and maintainability of these works can be improved.

Further, as set forth in claim 3, a return filter is provided in the hydraulic oil tank, a filter portion disposed in the hydraulic oil tank, and a mounting portion for mounting and fixing the filter portion to the hydraulic oil tank. Since the mounting portion and the filter portion are connected to each other by a tubular member, and the entire filter portion is immersed in the hydraulic oil, air is not mixed into the hydraulic oil returned into the hydraulic oil tank. ,
It is possible to prevent the occurrence of noise from the hydraulic pump and the occurrence of abnormalities in the hydraulic equipment.

Further, the upper end of the pump port protruding from the outer peripheral portion of the pump main body of the hydraulic pump,
Since it is arranged below the upper end of the pump main body, it is possible to extend the lower end of the hydraulic oil tank downward just below the upper end of the pump main body. As a result, the capacity of the hydraulic oil tank can be made larger than when the hydraulic pump is mounted with the pump port protruding upward from the upper end of the pump body, and the necessary capacity can be sufficiently secured. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a turning work vehicle of the present invention.

FIG. 2 is a plan view showing the inside of the hood.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view of the same.

FIG. 5 is a perspective view showing a return filter.

FIG. 6 is a side view showing the return filter attached to the hydraulic oil tank.

FIG. 7 is a rear view showing an arrangement position of a conventional hydraulic oil tank.

FIG. 8 is a side view showing a return filter attached to a conventional hydraulic oil tank.

[Explanation of symbols]

 2 Revolving body 14 Bonnet 21 Engine 21a Flywheel 22 Hydraulic pump 22a Pump port 22b Pump body 25 Hydraulic oil tank 26 Suction filter 27 Return filter 27a Mounting part 27b Filter part 27c Tubular member 32 Hydraulic oil supply pipe 34 Hydraulic hose

Claims (4)

[Claims] 1. A boom rotatably mounted on a revolving structure that is configured to be rotatable, an arm rotatably mounted on the boom, and a work attachment rotatably mounted on the arm. Work vehicle equipped with a working machine and a hydraulic oil tank for an engine and hydraulic equipment disposed in a hood at the rear of the revolving superstructure, the hydraulic oil tank being disposed above the engine and a hydraulic pump attached to the engine. A turning work vehicle characterized in that the hydraulic oil tank is extended toward the engine, and the hydraulic oil tank and the engine are overlapped in a plan view. 2. The turning work according to claim 1, wherein a hydraulic piping connecting the suction filter provided in the hydraulic oil tank to the hydraulic pump is arranged near an opening of the bonnet. car. 3. A return filter is provided in the hydraulic oil tank, the return filter is constituted by a filter portion disposed in the hydraulic oil tank, and a mounting portion for mounting and fixing the filter portion to the hydraulic oil tank. The turning work vehicle according to claim 1, wherein the filter unit and the filter unit are connected by a tubular member, and the entire filter unit is immersed in hydraulic oil. 4. The turning work vehicle according to claim 1, wherein an upper end of a pump port protruding from an outer peripheral portion of the pump main body of the hydraulic pump is disposed below an upper end of the pump main body.