JPS5828040Y2 - backhoe work machine - Google Patents

Description

[Detailed description of the invention] This invention is a backhoe in which a working arm is installed on a swivel base so that the mounting direction can be changed freely around the vertical axis in order to enable trench digging on the sides of the aircraft, so-called side ditch digging. Regarding work equipment.

Conventionally, the above-mentioned work machine has been configured so that the rotation operation and the arm direction changing operation are performed by separate operation tools, and the swivel base operation tool is configured so that the arm rotation around the vertical axis is mainly performed by rotation of the swivel base. However, due to the risk of collision with other objects, there are cases where the swivel base is fixed and the arm is rotated, or the swivel base is used to increase the work speed. When simultaneously rotating the boom part, arm part, and packet, the three operating tools must be selectively changed and operated, making the operation difficult and slow. The drawback was that it tended to reduce efficiency and cause pilot fatigue.

In view of the above-mentioned circumstances, the present invention aims to improve operability by allowing simultaneous or alternative operation of turning operation and arm direction changing operation without the need to change the operation tool. In order to improve work efficiency and reduce fatigue, and to obtain a configuration that allows operations to be carried out without having to change hands, it is possible to safely and easily make delicate adjustments when performing operations using the operating tools. The purpose of the present invention is to provide a backhoe working machine with a structured structure.

Next, embodiments of the present invention will be described based on the drawings.

A swivel base 2 capable of full rotation is provided on a traveling machine base equipped with a pair of left and right crawler type traveling devices 1, 1, and a working arm 7 consisting of a boom portion 7a and an arm portion 7b is mounted on the swivel base 2. The boom cylinder 5 and the arm cylinder 6 as an actuator for vertical swing drive are configured to perform raising and lowering operations and bending and stretching operations, and the swing cylinder 3 as an actuator for changing direction around the vertical axis 4 It is configured and installed so that the mounting direction can be changed freely.Furthermore, a packet 10 is attached to the tip of this arm 7, which can swing up and down by a tilt cylinder 8 and a link mechanism 9, and each cylinder can be operated to perform excavation work. In particular, the backhoe machine is configured to be capable of digging ditches.

A hydraulic drive operation system for the crawler type traveling device 1, the swivel table 2, and each of the cylinders 3, 5, 6.8 is arranged as shown in FIG.

That is, by operating the pulp 12 with the operating tool 11, the hydraulic oil supply from the pump 13 to the motor 14 for driving the left side crawler traveling device 1 can be controlled, and by operating the pulp 16 with the operating tool 15, the pump 17 can be controlled.
A motor 1 for driving the right side crawler traveling device 1 from
The hydraulic oil supply to 8 can be controlled.

Further, by operating the pulp 19, it is possible to control the supply of hydraulic oil from the pump 17 to the swing motor 20, which serves as a swing actuator for driving the swing base 2.

Moreover, the structure is such that the supply of hydraulic oil from the pump 17 to the swing cylinder 3 can be controlled by operating the pulp 21, so that the swing cylinder 3 can be expanded and contracted.

The pump 22 is operated to control the supply of hydraulic oil from the pump 13 to the boom cylinder 5, so that the boom cylinder 5 can be expanded and contracted.

Further, by operating the pulp 23, the supply of hydraulic oil from the pump 17 to the arm cylinder 6 is controlled so that the arm cylinder 6 can be extended and contracted.

Further, by operating the pulp 24, the supply of hydraulic oil from the pump 13 to the tilt cylinder 8 is controlled so that the tilt cylinder 8 can be expanded and contracted.

The valve 22 for operating the boom cylinder 5 and the valve 24 for operating the tilt cylinder 8 are interlocked and connected to one operating tool 25, and by operating the operating tool 25 in a cross direction, both valves 22 and 24 can be operated simultaneously. Alternatively, it is configured to allow alternative operations.

Further, the valve 19 as a control valve for controlling the swing motor 20 and the valve 23 as a control valve for operating the arm cylinder 6 are interlocked and connected to one operating tool 26,
The configuration is such that both valves 19 and 23 can be operated simultaneously or alternatively by operating the operating tool 26 crosswise.

The valve 21 as a control valve for operating the swing cylinder 3 is interlocked and connected to the operating tool 26 for swing operation, and by operating this operating tool 26, the valve 21 and the valve 19 for swing operation are integrated. In the hydraulic oil supply path from the pump 17 to the swing motor 20 and the swing cylinder 3, a hydraulic oil supply path to both actuators 3, 20 is alternatively provided. Solenoid valve 27 as a switching valve for opening and closing
An operating tool 28 for operating the electromagnetic valve 27 is provided on the operating tool 26 for turning operation, so that by operating the electromagnetic valve operating tool 28, the operating tool 26
The target operating system is switched between a hydraulic drive operating system for turning and an operating system for changing the mounting direction of the working arm 7.

In other words, by operating the operating tool 28 for switching the operating system while gripping the operating tool 26, it is possible to perform an alternative operation between the rotation operation and the arm installation direction changing operation without having to change the grip of the operating tool. It is configured.

In addition, in the above embodiment, for switching the operating system or
Although a case is shown in which the operating tool 28 for operating the swing cylinder 3 is provided on the operating tool 26 for rotating operation, these attachments may be reversed. It is sufficient if the simultaneous operation or alternative operation of the above can be performed without changing the operating tool. It is called 28.

As shown in the above embodiments, the backhoe work vehicle according to the present invention is characterized by a control valve for the swing actuator that drives the swing base, and a control valve for the actuator that drives the work arm to swing vertically. In order to operate the control valve of the actuator for changing the direction of the working arm with a single first operating tool, the first operating tool is configured to be swingable in two different directions, and the control valve of each of the control valves is operated by a single first operating tool. One of the control valves is linked to the operation of the first operating tool in one direction, and the other two control valves are linked to the operation in the position direction, and the other two control valves are linked to the operation in the other direction. A switching valve is provided on the upper side of the pressure oil supply path for the two control valves for selectively supplying pressure oil to only one side of the control valves, and furthermore, for switching operation of this switching valve. The second operating tool is arranged adjacent to the grip of the first operating tool, and this configuration provides the following effects.

That is, the control valves 19° 21.23 provided in the operating system of the swivel base 2, the vertical swing operating system of the working arm 7, and the direction change operating system of the working arm 7 are operated in two different directions. A first operating tool 26 that is flexible and a switching valve 27 that selects one of the control valves 19 and 23 of the two operating systems are used, and a second operating tool for operating the switching valve is used. By adding the configuration in which the tool 28 is provided near the grip of the first operating tool 26, it becomes possible to operate two types of required operating systems without having to change the operating tool, which is a remarkable improvement. This is effective in improving operability, improving work efficiency, and reducing operator fatigue.

Furthermore, the second operating tool 28, which is connected to the grip of the first operating tool 26, is only used as a switching tool, and is not intended to operate the control valves of each operating system. Since it is operated using the first operating tool which is provided with a simple structure, there is an advantage that delicate control can be easily performed.

[Brief explanation of drawings]

The drawings show an embodiment of the backhoe working machine according to the present invention,
FIG. 1 is an overall side view of the backhoe working machine, FIG. 2 is a hydraulic drive system diagram, and FIG. 3 is a perspective view showing the main parts. 2... Swivel base, 3... Actuator, 4... Vertical axis, 6... Actuator, 7... Working arm, 19°21.23・
... Control valve, 26 ... First operating tool, 27
......Switching valve, 28...Second operating tool.

Claims (1)

[Scope of utility model registration request] A backhoe working machine in which a swivel base 2 is mounted on a traveling machine base, and a working arm 7 is installed on the swivel base 2, which is configured to be able to swing vertically and freely change direction around a vertical axis 4. , a control valve 19 of the swing actuator 20 that drives the swing table 2, a control valve 23 of the actuator 6 that drives the working arm 7 to swing vertically, and a control valve of the actuator 3 that changes the direction of the working arm 7. 21 is operated by a single first operating tool 26, the first operating tool 26 is configured to be swingable in two different directions, and one of the control valves 19, 21, and 23 is controlled. The valve 21 is linked to the operation in one direction of the first operating tool 26, and the other two control valves 19 and 23 are linked to the operation in the other direction, and are linked to the operation in the other direction. A switching valve 27 is provided on the upper side of the pressure oil supply path to the two control valves 19.23 for selectively supplying pressure oil to only one side of the control valves 19.23. Switching valve 2
The second operation tool 28 for switching operation of the
A backhoe working machine that is connected to the operating tool 26 near the grip part.