JPH06136789A - Self-traveling working machine - Google Patents

Abstract

PURPOSE:To make the heat and the noise generated from a hydraulic operation device provided under the floor of a driver seat hardly transmitted to the driver seat, in a hydraulic working vehicle. CONSTITUTION:On a carriage 11, a cabin 7 and a driver seat 2 are provided deviating to one side in the lateral direction of a box form swing frame 3 holding its center rotatable. At the inside of the swing frame 3 at the opposite side of the driver seat 2, a hydraulic operation device 8 which has a control valve 8a facing laterally is arranged along the swing frame 3 in the longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly provided with a working machine such as a construction machine or an agricultural machine which is operated by a hydraulic cylinder in the front part of a machine body, and a hydraulic operating device arranged under the floor of a driver's seat of the working machine. The present invention relates to improvement of a device adapted to feed hydraulic oil.

[0002]

2. Description of the Related Art Conventionally, a device such as a power shovel in which a working machine 1 provided at a front portion of a machine body is operated by a hydraulic cylinder has a driver's seat 2 left and right on a swing frame 3 as shown in FIG. The fuel tank 4 and the hydraulic oil tank 5 of the hydraulic system are provided on one side of the driver's seat 2 on the opposite side.
(See FIG. 1, which is an embodiment of the present invention), and an engine E covered with an engine hood 6 is arranged at the rear portion. And this driver's seat 2 is covered and the cabin 7
Is provided.

As shown in FIG. 7, the swing frame 3 supporting the driver's seat 2 is assembled in a box shape by welding steel plates, and a number of control valves 8 are provided under the floor of the driver's seat 2.
There is provided a hydraulic operating device 8 which is composed of a, hydraulic hoses, and a large number of operating links 8b for switching operation of these oil passages. The reason why such a configuration is adopted is that the operation pattern can be easily changed by removing the floor plate of the driver's seat 2 to rearrange the connection of the hydraulic valve 8a and the operation link 8b which require inspection and maintenance.

[0004]

However, the hydraulic oil of the hydraulic system becomes a high temperature of about 80 to 90 ° C. during use of the hydraulic system, and the hydraulic operating device 8 through which the hydraulic oil flows has a similar temperature. It will be heated. Further, in the hydraulic operating device 8, the control valve 8a, the operation link 8b, etc. move every time the hydraulic working machine is operated, and the hydraulic oil passes through the control valve 8a and the hydraulic hose. Therefore, when the hydraulic operating device 8 is arranged in front of the driver's seat 2 as shown in FIG. 7, the floor plate of the driver's seat 2 is heated by the heat generated by the hydraulic operating device 8, and the control valve 8a and the hose are also heated. Noise is generated by the hydraulic oil passing through the control valve 8a or the operation link 8b. This noise is transmitted to the swing frame 3 to be magnified, and then reverberates in the cabin 7 arranged on the swing frame 3, and the temperature in the cabin 7 rises, so that the driving environment is deteriorated particularly in summer. There is a problem of causing it.

The present invention solves the above-mentioned problems of the conventional self-propelled working machine, that is, the problems of noise and heat generation, and provides a device for improving the living environment of the driver's seat installed in the cabin 7. It is intended.

[0006]

A self-propelled working machine according to the present invention for achieving the above-mentioned object has a box-shaped swing frame 3 having a center portion rotatably supported on a chassis 11 on one side in the left-right direction. The cabin 7 and the driver's seat 2 are arranged so as to be deviated to the side of the swing frame 3, and the hydraulic operating device 8 having the control valve 8a laterally arranged inside the swing frame 3 on the side opposite to the driver's seat 2 is mounted on the swing frame. 3 are arranged in a vertically long shape.

In the self-propelled working machine according to the present invention, the hydraulic operating device 8 is provided at a position outside the driver's seat 2, preferably outside the cabin 7. The control valves 8a are oriented in the width direction of the swing frame 3 and are continuously arranged in the longitudinal direction.

[0008]

[Operation] The hydraulic operating device installed under the floor in front of the driver's seat on the swing frame is located on the side away from the driver's seat, so the operating noise of this hydraulic operating device is dispersed by the floor plate. As a result, the amount of noise transmitted to the driver's seat decreases because the noise is absorbed by the members arranged above the floor plate. Further, since the hydraulic operating device is provided at a position away from the driver's seat, the operator does not step on the floor plate warmed by the heat generated by the hydraulic operating device, so that the living environment can be prevented from deteriorating.

[0009]

[Examples] The present invention will be specifically described below with reference to illustrated examples. The work machine 1, which is a power shovel,
A chassis 11 is supported by a crawler belt 10 composed of left and right caterpillars or crawlers, and a grounding blade 1 is provided in front of the chassis 11.
2 is arranged, and its base end is supported by a chassis 11 so as to be able to move up and down. The swing frame 3 is rotatably supported by a shaft provided in the center of the chassis 11 in the vertical direction.

The swing frame 3 has a box shape assembled by welding steel plates, and a shovel mechanism 13 is provided at a front portion thereof.
Is provided. A driver's seat 2 is provided on one side of a central portion on a floor plate F forming the swing frame 3, and an oil tank such as a fuel tank 4 and a hydraulic oil tank 5 is arranged on the other side. As shown in FIGS. 4 and 5, the hydraulic operating device 8 is arranged at the front corner on the opposite side of the driver's seat 2. Therefore, this hydraulic operating device 8 is arranged at a position apart from the front part of the driver's seat 2.

As shown in FIGS. 1 to 3, the shovel mechanism 13 comprises a boom 15 having a lower end supported by a rotating member pivotally supported by the front end of the swing frame 3, and a boom cylinder 16 for hoisting the boom 15. . Excavator mechanism 13
Is connected to a swing cylinder 18 via an arm 17 protruding laterally, and the other end of the swing cylinder 18 is rotatably attached to the swing frame 3.
When the swing cylinder 18 expands and contracts, the rotating member 14 rotates in the left-right direction together with the boom 15.

The shovel mechanism 13 is constructed such that an operating arm 19 is pivotally supported at the tip of the boom 15 and the arm cylinder 20 is used to lie down. Then, the bucket 21 provided at the tip of the operating arm 19 is attached to the bucket cylinder 2
This is a bucket 2
1 is operated from the driver's seat 2 by operating the control device 23 to rotate, move forward and backward, and move up and down.

Now, as shown in FIGS. 4 and 5, the hydraulic operating device 8 has a supporting plate 25 supported by the swing frame 3.
The hydraulic valve 26 and the operation links 27a, 27b, 27
It is composed of c and actuating wires. The operation links 27a and 27b are connected to pattern switching links 29a and 29b of an operation post 28 provided in front of the driver's seat 2, and the links 29a and 29b are operated by the left and right operation levers 30a and 30b. Is configured. A traveling lever 31 is provided between the two operation levers 30a and 30b, and is connected to the hydraulic valve 26 via a rod 29c and an operation link 27c.

A hydraulic hose 32 connected to the hydraulic operating device 8.
The floor plate F behind the boom 15 as shown in FIG.
It is taken out from the lower side to the upper side, and is supported by a clamp member 33 provided at the front end of the swing frame 3. Then, it extends upward and is connected to an oil passage provided on the boom 15. Therefore, unlike the conventional device which is supported on the side of the boom 15 and is connected to the oil passage provided on the boom 15, there is no problem that the required length of the hose 33 is largely changed by the rotation of the boom 15. In other words, it is possible to reduce the extra length of the hose, and the shortest length is sufficient, which not only reduces the cost of parts but also reduces the bend angle, which improves the durability of the hose. it can.

Further, by arranging the hydraulic operating device 8 outside the vertical frame 3a forming the strength of the swing frame 3, noise generated from this is strongly blocked and transmitted to the driver's seat 2. Never. Furthermore, since the spool of the control valve 8a forms a valve assembly that is directed in the left-right direction with respect to the chassis 11, in a vertically long state in the space of the swing frame 3 on the side apart from the driver's seat 2. It can be arranged and the actuation link connected to it can be easily adjusted.

[0016]

According to the self-propelled working machine of the present invention, a box-shaped swing frame 3 having a central portion rotatably supported on a chassis 11 is provided.
A hydraulic operating device having a cabin 7 and a driver's seat 2 which are deviated to one side in the left-right direction, and a control valve 8a arranged laterally on the opposite side of the driver's seat 2 inside the swing frame 3. 8 are vertically arranged along the swing frame 3, and the following effects can be obtained.

1) Since the hydraulic operating device 8 is provided on the opposite side of the driver's seat 2, the noise and a large amount of heat generated from the hydraulic operating device 8 during driving are absorbed by the swing frame 3 and the like. Therefore, it is not strongly transmitted to the driver's seat 2 and there is no fear of deteriorating the living environment in the cabin 7. 2) By stacking the control valves 8a sideways, the entire hydraulic operating device 8 becomes vertically long and can be housed in the space on the swing frame 3 opposite to the cabin 7.

[Brief description of drawings]

FIG. 1 is an external perspective view of a power shovel according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a plan view showing a swing frame with a floor plate removed.

FIG. 4 is a front view showing a main part of a hydraulic operating device.

FIG. 5 is a plan view showing a main part of the hydraulic operating device.

FIG. 6 is a plan view showing a relationship between a hydraulic operating device and a driver's seat.

FIG. 7 is a plan view showing a swing frame of a conventional power shovel.

[Explanation of symbols]

1 Working Machine (Power Shovel) 2 Driver's Seat 3 Swing Frame 7 Cabin 8 Hydraulic Operating Device 8a Control Valve 8b Control Link 10 Chassis 23 Control Device 27a, 27b, 2
7c operation link 28 operation post 29a, 29b pattern switching link

Claims (1)

[Claims] 1. A cabin 7 and a driver's seat 2 are arranged with a box-shaped swing frame 3 rotatably supporting a central portion thereof on a chassis 11 so that the cabin 7 and a driver's seat 2 are disposed inside the swing frame 3. A self-propelled working machine in which a hydraulic operating device 8 having a control valve 8a arranged in a horizontal direction is vertically arranged along the swing frame 3 on the side opposite to the driver's seat 2.