JPS5845327Y2 - Operation structure of work vehicle - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a swivel base that can be freely driven and rotated around the vertical axis of the traveling aircraft, and that can freely swing horizontally and vertically around the vertical axis with respect to the swivel base. The present invention relates to an operating structure for a working vehicle equipped with a working device that can be driven and oscillated in any direction.

As for the above-mentioned work vehicle, for example, when we look at backhoes, their working style is to perform excavation work along an obstacle such as a building, that is, with the machine body positioned near a building, the vertical The boom is swung around the core in the opposite direction from the building, and the swivel table is rotated in the opposite direction to carry out excavation work, so-called ditch digging, with the packet aligned with the building. It can take any suitable form.

By the way, considering the relationship between the operating levers in this type of work vehicle, conventionally, two operating levers that can swing in two different directions are used to swing the arm up and down and rotate the swivel base with one lever. The boom is configured so that the other lever is used to swing the boom and the packet up and down, and another lever other than the two swingable operating levers is used to swing the boom left and right. There is.

Here, when performing the above-mentioned side ditch digging work, the soil removal work can be carried out with high work efficiency by combining the vertical swing of the arm, the rotation of the swivel table, and the vertical swing of the boom and packet. The work is being carried out, but if the swivel table located close to the building is rotated every time soil is removed, if there is a building within the swivel radius of the swivel table, the turning operation will be difficult. This places a huge mental burden on the workers.

However, in order to swing the boom, it is not only necessary to have to change the control lever each time, but there is also a problem that it may lead to erroneous operation.

The technical problem that this invention aims to solve is as before:
The swivel base and work equipment are operated by a combination of multiple operating levers that can be swung in two directions or in one direction, that is, by a combination of structures that operate one operating system by operating the levers in one direction. Instead, it is designed so that three operating systems can be operated with a single operating lever that can swing in two directions, allowing for more operating systems to be operated separately than the number of swinging directions of the lever. , it simplifies the control operations associated with work, reduces the risk of erroneous operation, and also rationalizes the combination of the operating direction of the operating lever and the working form of the operating system that is operated accordingly. The objective is to obtain an operating structure that is less dangerous in the unlikely event that an erroneous operation occurs.

The technical means of the present invention taken to solve the above-mentioned technical problems is to provide a swivel base to the traveling aircraft so that it can freely rotate around the vertical axis, and to swivel the swivel base to the left and right around the vertical axis. A working device is provided so as to be movable and movable in the vertical direction, and each of the rotating operation system of the swivel base, the left-right swinging operating system of the working device, and the vertical swinging operating system of the working device. An operating mechanism for controlling each of the drives separately is provided, and each operating mechanism is linked to a single operating lever that is configured to swing freely in two different directions, thereby controlling each operating system. In the operation structure of the work vehicle configured to control the operation lever and each of the operation mechanisms, when the operation lever is operated in one direction, the operation mechanism of the vertical swing operation system of the work device is operated. The interlocking mechanism is linked with an interlocking mechanism that operates the operating mechanisms of two operating systems, the swivel operating system of the swivel base and the left-right swing operating system of the working device, when operated in the other direction, and The interlocking mechanism for operating each operating mechanism of the two operating systems is provided with a selection mechanism for selectively selecting one of the two operating mechanisms and interlocking the operating mechanism with the operating lever. .

The effects obtained by taking the above technical measures are as follows.

■ In other words, among the interlocking mechanisms that are linked to the operating directions of the operating levers, a selection mechanism is provided in the interlocking mechanism that provides two operating systems, and a selection mechanism is provided in the interlocking mechanism that provides two operating systems. Since the operation mechanism of the other operation system is essentially checked, this selection switch allows the operation of three operation systems, which are greater than the number of swing directions of the operation lever, to be performed in one operation. This has resulted in an extremely easy-to-operate operation structure for a work vehicle that can be operated individually using a lever, eliminating the need to change the levers. Since the number of levers can be reduced in the operating section, the risk of erroneous operation due to incorrect selection of the lever itself is reduced, and safe work can be performed.

■Furthermore, the two operating systems that are selectively linked in response to the operation of the operating lever in one direction are the swivel operating system for the swivel base and the left-right swing operating system for the working equipment, both of which are directed in the direction of the working equipment. Since it is a rotating operation system for changing the
Even if the selection of the operating system itself is incorrect, the only difference is whether the direction of the working device is changed by itself or by the rotation of the swivel table, and therefore, a completely unexpected device may occur due to an erroneous operation. There is less danger from erroneous operation than when the device operates unexpectedly.
In this respect as well, it is easy to ensure work safety.

Embodiments of the configuration of the present invention will be described below with reference to the drawings.

FIG. 1 shows a backhoe as an example of a work vehicle. A swivel base 4 on which a driver's cab 3 is mounted is attached to a machine base 2 equipped with a crawler traveling device 1 so as to be fully rotatable. It is configured to be equipped with an excavation work device 6, which is an example of a work device.

The excavation work device 6 includes a boom bracket 7 that swings left and right around a vertical axis with respect to the swivel base 4, and a boom 8 that swings up and down around a horizontal axis with respect to the bracket 7.
An arm 9 connected to the tip of the boom 8, a packet 10 connected to the tip of the arm 9, and a fluid pressure actuator 11 for driving and swinging these around the axis.
・Each actuator 11... has an operating mechanism 13... by an operating lever 12.12H.
It is operated by switching...

The operating lever 12 a is used to operate the boom 8 in the vertical direction and to operate the packet 10 in the horizontal direction. By swinging in the other direction, the boom 8 can be swinged in the left-right direction or the swivel base 4 can be turned.

The mechanism for interlocking and connecting the lever 12a and the operating mechanism 13.13 is a cylinder body 15 that is loosely fitted to the shaft 14, and a rod that can freely bend the operating lever 12a around an axis P1 perpendicular to the axis P. 16. The arm 17, which is constructed from T6' and is connected in series and extends in a direction perpendicular to the cylinder 15, and the packet operating mechanism 13 are interlocked and connected via a rod 18,
The rod 16 that swings around the axis 21 is provided with an arm 19 extending in a direction parallel to the axis P, and the arm 19 is provided with an arm 19 extending in a direction parallel to the axis P.
2 is loosely fitted with a cylinder 22 on which an arm 21 extends on the axis 20 parallel to the axis P, and the arm 19 is parallel to the axis P1, and the arm 21 is parallel to the axis P. Both arms 19.21 are connected to the lever 23 via a shaft concentric with the
An arm 24 is pivotally connected to the cylindrical body 22 by
and the boom vertical swing operation mechanism 13 are pivotally connected via a rod 25, so that the bucket 1-10 can be operated by operating the lever 12a around the axis P, and the lever around the axis P1 can be operated by operating the lever 12a around the axis P1. The vertical swing operation of the boom 8 can be performed selectively or in combination by the 12 operations.

The interlocking mechanism between the lever 12 and the operating mechanism 13 is such that a shaft 28 having an axis P1 perpendicular to the axis P is connected to a cylinder 27 which is loosely fitted onto the shaft 26 via a frame 29. Three cylindrical bodies 30 are loosely fitted to the shaft 28, and the operating lever 12 is connected to the intermediate cylindrical body 30, and a lever 31 extending from the cylindrical body 27 and an operating mechanism 13 for the arm 9 are connected. are pivotally connected via a rod 32.

An arm 33 is attached to each of the cylindrical bodies 30 and 30 on both sides.
33 is extended, and a cylindrical body 36, 26 is loosely fitted to an axis 34 whose axis P2 is parallel to the axis P. Both arms 33 and 35 are pivotally connected by a lever 37 via a shaft parallel to the arm 25 and coaxial with the axis P, and the left and right operation mechanism 13 of the boom 8 and the rotation operation of the rotation base 4 are controlled. Mechanism 13
are pivotally connected to levers 39 extending to the cylinders 36 and 36 via rods 38, and the cylinders 3 on both sides
A selection mechanism 40 for selectively connecting the levers 0 and 30 to the lever 12 is provided.

In other words, each member connected to the intermediate cylinder 30 constitutes an interlocking mechanism for connecting one operating system to the operating lever 12, and each member connected to the cylinders 30 and 30 on both sides constitutes an interlocking mechanism for connecting two operating systems to the operating lever 12. A selection mechanism 40 constitutes an interlocking mechanism for interlocking with the control lever 12, and selects one of the cylinders 30, 30 on both sides thereof to be interlocked with the operation lever 12, and operates the two operation systems. It is a selection mechanism in the interlocking mechanism, and the arm 9 is operated by swinging the lever 12 around the axis P, and the lever 12 swings around the axis P1 after selection is connected by the selection mechanism 40. It is configured so that the boom 8 or the whirling wind 4 can be rotated selectively or in combination.

The selection mechanism 40 pivots the locking piece 42 on the operating lever 12 via a shaft 41 perpendicular to the axis P1, and selects one of the ends of the locking piece 42 when the lever 12 is in a neutral state. The engaging portions 43.43 that allow engagement are connected to the cylindrical bodies 30.3 on both sides.
0, and is normally used as the rotating operation cylinder 30 of the rotating base 4.
A biasing mechanism 44 for engaging and biasing the locking piece 42 is provided in the engaging portion 43 of the locking piece 42, and the locking piece 4
The lever 12 is provided with a bell crank lever 45 and a wire or rod 46 for switching and engaging the locking portion 2 with the other retaining portion 43.

[Brief explanation of the drawing]

The drawings show an embodiment of the excavator vehicle according to the present invention, with FIG. 1 being an overall side view and FIG. 2 being a perspective view of the operating lever interlocking mechanism. 4... Swivel base, 6... Working device, 12
......operating lever, 13...... operating mechanism,
40... Selection mechanism.

Claims (1)

[Scope of utility model registration request] The swivel base 4 can be driven and rotated freely around the vertical axis relative to the traveling aircraft.
A working device 6 is provided so as to be able to swing left and right about the vertical axis with respect to the swivel base 4 and to be driven and oscillate in the vertical direction.
An operation mechanism 13 that separately controls the drive of the left-right swing operation system of the working device 6 and the vertical swing operation system of the working device 6.
. . . are arranged, and each operating mechanism 13 . . .
An operation structure for a work vehicle, in which the operation lever 12 is connected to one operation lever 12 configured to be swingable in two different directions to control the respective operation systems, wherein the operation lever 1
2 and each of the operating mechanisms 13 . The operation mechanism 13 of two operation systems, the rotation operation system of the swivel base 4 and the left-right swing operation system of the working device, is operated in the other direction.
．． The interlocking mechanism that operates the operating mechanism 13.13 and the interlocking mechanism that operates each operating mechanism 13. An operating structure for a work vehicle, characterized in that a selection mechanism 40 is provided for selecting and interlocking with the operating lever 12.