JPH0568406A - Multipurpose work machine - Google Patents

Abstract

(57) [Summary] [Purpose] A hydraulic pump unit can be installed compactly without changing the structure of the machine. [Configuration] An engine 3 and a mission case 5 having a control seat 6 arranged above are mounted on a rear part of a body 2 supported by a pair of left and right crawler traveling devices 1, and a working device 8 is mounted on a front part of the body 2. A multi-purpose work machine detachably provided at a position forward of the control tower 7, wherein a hydraulic pump unit 14 for raising and lowering the work device is extended between the pair of left and right crawler traveling devices 1 and forward of the mission case 5. It is arranged in the lower abdominal space of the fuselage below the output shaft 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a mission case having an engine and a control seat arranged above it on the rear part of a machine body supported by a pair of left and right crawler traveling devices, and a working device on the front side of the machine body. The present invention relates to a multipurpose working machine that is detachably provided at a position ahead of a control tower of a section.

[0002]

2. Description of the Related Art Conventionally, as a multipurpose working machine, a walking type working machine has been used for the purpose of performing management work such as mowing and tilling, but in recent years, with the increase in size of working equipment, Since it has become difficult to manually hold the handle, a riding-type working machine, which is a modification of the walk-type working machine having the conventional structure, has come to be provided.

[0003]

Therefore, the engine, the mission case, the crawler traveling device, etc. of the conventional walk-type working machine are assembled in the same manner as in the conventional case, and the control seat is located above the mission case. However, the control tower is arranged in front of the control seat, and the working device is attached further in front of the control tower. However, in the above-described conventional structure, the hydraulic pump unit for operating the working device to move up and down relative to the machine body is installed on the upper side of the machine body frame near the mission case. It was necessary to secure a space, and it was difficult to secure that space.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a multipurpose working machine in which a hydraulic pump unit can be compactly installed without changing the structure of the machine body.

[0005]

In order to achieve the above-mentioned object, a multipurpose working machine according to the present invention has a structure as described above, in which a hydraulic pump unit for raising and lowering the working apparatus is provided with the pair of left and right crawler traveling devices. Between the mission case and the control tower, and is disposed in the lower abdominal space of the fuselage below the output shaft extending forward from the mission case. The actions and effects of this characteristic configuration are as follows.

[0006]

That is, the hydraulic pump unit is located between the pair of left and right crawler traveling devices, which originally have a space, and below the output shaft extending forward from the mission case between the mission case and the control tower. Since it is deployed in the lower abdomen space of the aircraft, without securing a special installation space,
The heavy-duty hydraulic pump unit can be installed at a low position to stabilize the machine body.

[0007]

Therefore, since the hydraulic pump unit can be installed at a low center of gravity by effectively utilizing the space that is inevitably generated in the airframe structure, the airframe structure can be made compact and the airframe can be easily stabilized. Came to.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1, 2 and 4 show a type of multipurpose working machine according to the present invention. In this multipurpose working machine, an engine 3 is mounted on the rearmost portion of a machine body 2 having a frame structure supported by a pair of left and right crawler traveling devices 1, 1, and the power from the engine 3 is supplied to a main clutch and a hydrostatic stepless. A mission case 5 input via the transmission 4 is mounted in front of the engine 3,
A seat installation frame 2B constituting the airframe 2 is erected above the main frame 2A, and a steering seat 6 is attached to the frame 2B, and a steering lever 22, a clutch lever, etc. are provided in front of the steering seat 6. A control tower 7 provided with is installed upright, and a working device 8 such as a mowing device is attached to the front of the control tower 7 so as to be vertically swingable and detachably attached via a hitch 9. There is.

Then, as shown in FIG. 1, a power transmission shaft 10 as an output shaft for driving the working device 8 through the lower part of the mission case 5 and driving the working device 8 forward from the front part thereof is extended. At the same time, a traveling output shaft that is interlocked with the drive sprockets 1A, 1A of the left and right crawler traveling devices 1, 1 projects laterally from the lower lateral sides of the mission case 5. The power transmission shaft 10 extends to the most distal end of the machine body 2 via two universal joints 11 and 11, and its tip end is pivotally attached to the hitch 9. As shown in FIGS. 1 and 2, the hitch 9 has a power transmission shaft in a state in which a hitch main body 9A machined into a box-shaped sheet metal faces a meshing clutch portion 12 meshingly connected to an input shaft of a working device 8. It has 10 pivot points. Further, as shown in FIG. 1, the hitch 9 can swing up and down about the horizontal axis P in the main frame 2A of the machine body 2 in a pair of left and right arm members 9B, 9B extending rearward from the hitch body 9A. Is pivotally attached to. A cylinder rod 13a of a hydraulic cylinder 13 for vertically swinging the hitch 9 is pivotally attached to a pin provided on the free ends of the arm members 9B and 9B.
The cylinder case 13b of the hydraulic cylinder 13 is pivotally mounted while being arranged inside the exterior box case 7A of the control tower 7. Further, a solenoid valve and the like are also incorporated in the exterior box case 7A.

The crawler traveling device 1, 1 comprises four rolling wheels 1B, and the rearmost rolling wheel 1B among the rolling wheels 1B is arranged behind the drive sprocket 1A. On the other hand, the most advanced wheel 1B
Are arranged so as to be located between the hitch 9 and the control tower 7 in the front-rear direction.

A hydraulic pump unit 14 integrally assembled with a hydraulic pump for supplying pressure oil for driving the hydraulic cylinder 13 to expand and contract, an oil tank, and a switching valve for switching supply and discharge of the pressure oil passage. As shown in FIGS. 1 to 4, the crawler traveling devices 1 and 1 are arranged in the space below the power transmission shaft 10 between the left and right crawler traveling devices 1 and 1 and between the mission case 5 and the control tower 7. ing. That is, the hydraulic pump unit 14 is connected and fixed to the track frames 1C, 1C of the crawler traveling devices 1, 1 via the connecting member 15. The hydraulic pump unit 14 is driven by a belt transmission mechanism in which a belt 18 is stretched over a driven pulley 16 provided on the input shaft of the hydraulic pump and a drive pulley 17 connected to the power transmission shaft 10. The transmission / reception of power transmission to / from the work device 8 is performed by a dog clutch 19 which is operated to shift. That is, the shift member 20 locked to the lower end of the clutch operating lever 21 beside the control seat 6 is spline-fitted to the power transmission shaft 10 so as to be slidable in the perspective direction with respect to the drive pulley 17. The gear-shaped fitting portion 20A formed at the end of the shift member 20 facing the drive pulley 17 is a fitting recess 1 formed on the surface of the drive pulley 17 facing the shift member 20.
7A can be inserted and removed by sliding the shift member 20.
The dog clutch 19 is configured.

As a result, by swinging the clutch lever 21 back and forth, the working device 8 can be appropriately turned on and off. Incidentally, the transmission of power to the hydraulic pump unit 14 is switched on and off by a main clutch (not shown) provided on the upper side of the transmission of the power transmission shaft 10. Further, the steering lever 22 also serves as an operation lever for vertically swinging the hitch 9 when attaching or detaching the work device 8. That is,
By selecting one of the steering levers 22 left and right and swinging the steering levers 22, a pair of left and right steering clutch operating hydraulic cylinders mounted in front of the mission case 5 and below the control seat 6 are operated. The hitch 9 is selected and driven, and on the other hand, the hitch 9 is vertically swung in response to the forward and backward swing operation of the steering lever 22.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the above description.

[Brief description of drawings]

FIG. 1 is an overall side view showing a multipurpose working machine.

FIG. 2 is a plan view showing a multipurpose working machine.

FIG. 3 is a vertical sectional side view showing a hydraulic pump unit and a power transmission shaft.

FIG. 4 is a side view showing a multipurpose working machine equipped with a working device.

[Explanation of symbols]

 1 Crawler traveling device 2 Airframe 3 Engine 5 Mission case 6 Control seat 8 Working device 10 Output shaft 14 Hydraulic pump unit

Claims (1)

[Claims] 1. An engine (3) and a control seat (6)
The mission case (5) arranged above is mounted on the rear part of the machine body (2) supported by the pair of left and right crawler traveling devices (1), and the working device (8) is mounted on the front part of the machine body (2). A multipurpose working machine detachably provided in a position forward of a control tower (7), wherein a hydraulic pump unit (14) for lifting a working device is provided between the pair of left and right crawler traveling devices (1) and the mission. A multipurpose working machine disposed between the case (5) and the control tower (7) in an abdominal space below the output shaft (10) extending forward from the mission case (5).