JPH09100551A - Back-hoe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to get on and off a back-hoe from both right and left sides of a swivel-base in the miniaturized back-hoe equipped with an excavation device capable oscillating right and left around a vertical shaft on the front of the swivel-base. SOLUTION: An engine E is provided on the rear side of a swivel-base 3, at the same time, a balance weight 9 forming an operating fluid tank section 9a therein is provided backward of the engine E, a swing cylinder 16 of an excavation device is provided in the inside of the swivel-base on one side of the horizontal engine E and, at the same time, a fuel tank 18 is provided in the inside of the swivel-base on the ther side of the horizontal engine E. Then, an operator's seat is provided on the upper pat of an engine hood 7, at the same time, an operation box 6 is provided forward of the operator's seat, and a passage R capable of getting on and off from both right and left sides of the back-hoe body is formed between the operation box 6 and engine hood 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small backhoe provided with an excavating device at a front portion of a swivel, which is swingable right and left around a vertical axis.

[0002]

2. Description of the Related Art A conventional backhoe is the actual one, Shokai Sho 61-13.
As disclosed in Japanese Patent Publication No. 0659 and Japanese Utility Model Laid-Open No. 62-7461, levers for driving and operating an excavator and a crawler traveling device are provided in the front part of the swivel base, and an engine is mounted in the rear part of the swivel base. A fuel tank is arranged under the driver's seat arranged in front of the engine, and a hydraulic oil tank is arranged on one lateral side of the driver's seat.

[0003]

Since the backhoe has a rotary joint in the center of the inside of the swivel and a swing cylinder of the excavator on the right side, the engine and tanks are arranged on the upper surface of the swivel. Since the structure is required and the engine and tanks must be placed in the limited space on the upper surface of the swivel base, the tanks must be placed in the empty space on the side of the driver's seat. It is not there. As a result, the structure is such that the passenger can get on and off only from one lateral side of the machine body, and when getting on and off, it is necessary to turn to the lateral one side of the machine body one by one, which is inconvenient for getting on and off. Further, since the hydraulic oil tank is arranged on the same side as the swing cylinder of the excavator, the lateral balance of the machine body is not so good.

Therefore, as means for solving the above-mentioned drawbacks,
It is conceivable to dispose the hydraulic oil tank on the lateral side of the control box in front of the driver's seat, but in such a case, there is a disadvantage that the hydraulic oil tank blocks the front view.

An object of the present invention is to devise the layout of the engine and fuel tanks so that the left and right sides of the swivel can be used to get on and off the vehicle while balancing the left and right sides of the machine body.

[0006]

According to a characteristic construction of the present invention, an engine is arranged on the rear side of a swivel base, and a balance weight having a hydraulic oil tank inside is installed behind the engine. The swing cylinder of the excavator is arranged in the swivel on one side of the engine, the fuel tank is arranged in the swivel on the other side of the engine, and a driver's seat is provided above the engine bonnet. A steering box is provided in front of the driver's seat, and a passage is formed between the steering box and the driver's seat so that passengers can get on and off the vehicle from the left and right sides.

[Operation] By arranging the fuel tank and the swing cylinder of the excavator separately on the left and right of the swivel base, the left and right of the machine body are balanced, and the hydraulic oil is provided inside the balance weight forming the rear frame of the swivel base. By providing the tank portion, it is not necessary to dispose the hydraulic oil tank in the space on the side of the driver's seat, and a space for getting on and off can be secured on the side of the driver's seat.

[Effect] As a result of the above configuration, the left and right of the machine body are not balanced, and tanks for obstructing the passage for getting on and off are not provided at the lateral side of the driver's seat, so that getting on and off from the left and right of the swivel platform It will be possible.

[0009]

1 shows an entire backhoe A equipped with a dozer device 1, in which a swivel base 3 is attached to an upper part of a crawler traveling device 2 so as to be rotatable around a vertical axis P, and the swivel base is shown. The swing bracket 4 is attached to the front part of 3 so as to be swingable right and left around the vertical axis, and the swing bracket 4 is attached to the swing bracket 4.
An excavator 5 including a boom 5a, an arm 5b, and a bucket 5c is attached so as to be vertically swingable around a horizontal axis X, and
On the left front side of the swivel base 3, there is provided a control box 6 in which a lever for driving and operating the crawler traveling device 2, the excavation device 5 and the like is provided, and a control seat 8 is provided on an upper surface of an engine hood 7 at a rear portion.
And a balance weight 9 is provided at the rear of the swivel base 3.

As shown in FIGS. 2 and 3, an opening 3a is formed on the rear side of the swivel base 3 for placing the lower part of the engine E in the swivel base 3 and placing it therein.
At a position a, the radiator E and the radiator cooling fan 11 are located on the right side, and the engine E is arranged sideways, and the air cleaner 1 is installed above the right rear portion of the engine E.
2, muffler 13 above the left side of the engine,
The hydraulic pump 14 on the left side of the engine E.
Is attached. Then, a rotary joint 15 is provided in the center of the inside of the swivel base 3, a swing cylinder 16 of the excavator is located on the right side, a swing motor 17 is located slightly to the right of the center, a fuel tank 18 is located on the left side, and a cylinder of the excavator is located on the left front. A valve group 19 for the hydraulic motor of the crawler traveling device is arranged.

The balance weight 9 at the rear of the swivel base is
The balance weight doubles as a hydraulic oil tank, is made of cast metal, and an upper portion of a recess 9a forming a hydraulic oil tank portion is sealed with a lid 9b. An auxiliary tank portion 9c for increasing the amount of hydraulic oil is provided on the upper left side of the lid 9b, and an oil gauge 9d is provided on the left side surface of the auxiliary tank portion 9c. The battery 20 is arranged on the upper surface of the balance weight 9.

The engine bonnet 7 is formed in a shape that covers substantially the entire lateral width of the swivel 3 from the center to the rear of the swivel 3 in the front-rear direction, and a bracket 21 provided on the lid 9b of the hydraulic oil tank 9a. And a bracket 22 provided on the inner surface of the bonnet 7 via an unequal side link mechanism 23 that can swing and open rearward of the machine body.

The upper surface of the front part of the swivel base 3 is formed into a flat flat step 3A, and a passage R is formed between the control box 6 and the engine bonnet 7 so that the passenger can get on and off the vehicle from either side of the airframe. ing.

On the right side surface of the engine bonnet 7,
An intake grill (not shown) is formed for the radiator cooling fan 11, and exhaust air after cooling the radiator is exhausted from a lower opening of the swivel base 3.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

1] Overall side view of backhoe

FIG. 2 is a partially cutaway side view of the swivel base.

FIG. 3 is a plan view of a swivel base.

[Explanation of symbols]

 3 swivel 5 excavator 6 control box 7 engine bonnet 8 driver's seat 9 balance weight 9a hydraulic oil tank section 16 swing cylinder 18 fuel tank E engine R entry / exit passage

Claims (1)

[Claims] 1. A backhoe provided with an excavation device (5) swingable left and right around a vertical axis at a front portion of a swivel base (3), wherein an engine (E) is provided at a rear side of the swivel base (3). A balance weight (9) having a hydraulic oil tank portion (9a) formed therein is installed behind the engine (E), and a swivel base (3) on one lateral side of the engine (E) is installed. The swing cylinder (16) of the excavator is arranged inside, and the fuel tank (18) is arranged inside the swivel base (3) on the other lateral side of the engine (E), and further, the engine bonnet (7) is arranged. A driver's seat (8) is provided on the upper part, and a control box (6) is provided in front of this driver's seat (8), and it is possible to get on and off from the left and right of the aircraft between the control box (6) and the engine bonnet (7). A backhoe with a wide passage (R).