JPH0349166Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a power swivel operator's cab that makes it easy to get on and off the vehicle.

BACKGROUND TECHNOLOGY Conventionally, the operator's cab of a power swivel is installed at the front of the upper revolving structure.

Problems that the invention aims to solve: For this reason, when the driver gets on and off the vehicle, steps are used around the undercarriage, but as vehicles become larger, the height of the undercarriage also increases, resulting in the problem that it is not easy to get on and off the vehicle. Ta.

In addition, in conventional power swivels, a driver's cab is provided at the very front of the upper revolving structure to improve forward visibility.

As a result, the distance from the center of rotation of the upper revolving structure to the driver's cab becomes large, causing problems such as the driver in the operator's cab being shaken considerably when the upper revolving structure turns, causing early fatigue of the driver.

This invention was made for the purpose of improving the above-mentioned problems.

Means and action for solving the problem A guide rail is installed in the front and back direction on the upper revolving body which is rotatably provided on the undercarriage, and the upper revolving body moves back and forth on this guide rail in conjunction with the rotation of the upper revolving body. A slide base is provided, a rotating arm that can be raised and lowered is provided on the slide base, and the driver's cab body is swingably suspended from the tip of the rotating arm via a telescopic boom. , a power swivel driver's cab that allows the bottom of the cab to be grounded.

Embodiment An embodiment of this invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a tracked undercarriage, and an upper revolving body 2 is installed on the undercarriage 1 so as to be freely swingable. A working machine 3 is attached to the center of the front part of the upper revolving body 2, and a driver's cab main body 4 is installed on the side thereof. The driver's cab main body 4 is placed on a guide rail 5 installed in the front-rear direction on the upper revolving structure 2,
It is mounted on a slide base 7 that is moved back and forth in conjunction with the rotation of the upper revolving body 2 by a driving means 6 such as a hydraulic cylinder as follows.

That is, hydraulic motors (not shown) are installed inside both sides of the slide base 7, and the base ends of a pair of rotating arms 9 are fixed to a rotating shaft 8 rotated by the hydraulic motor. Each rotating arm 9
A telescopic boom 12 is provided on the leading end side of the operator's cab body 4, which is guided by a guide roll 10 and is telescopically extendable from the leading end of the rotating arm 9 by means of a telescopic cylinder 11. Both sides of 4a are pivotally supported by a support shaft 13. The support shaft 13 is located on a perpendicular line passing through the center of gravity of the driver's cab body 4, and is always kept horizontal even when the rotating arm 9 is rotated about the rotating shaft 8.

Further, various control devices (not shown) are provided in the driver's cab 4.

In addition to a group of electric switches controlled by operating levers, the control device is provided with an interlocking switch 14 that interlocks the rotation of the upper revolving structure 2 and the forward and backward movement of the driver's cab 4.

Signals from the electric switch group and the interlocking switch 14 are transmitted to a control circuit 15 provided on the upper revolving structure 2 side by an electric cable (not shown).

The above-mentioned electric cable is set in advance to have a sufficient length so as not to interfere with the longitudinal and vertical movement of the driver's cab 4, and is routed along the telescopic boom 12 and the rotating arm 9 to the slide base 7 side. Furthermore, the control circuit 15 is wired from the slide base 7 to the upper rotating body 2 side, and based on signals from the electric switches, a control signal is sent to a work operation valve (not shown) provided in the work machine hydraulic circuit. The operation of the actuators provided in each part of the work machine 3 is controlled by the work machine operation valve.

Based on the signal sent from the interlock switch 14 to the control circuit 15, the operator's cab 4 and the upper revolving structure 2 are interlocked as follows. In other words, the driver's cab body 4
When the interlocking switch 14 provided inside is turned on, the operation valves 16 and 17 are controlled based on the program inputted in advance to the control circuit 15, and the hydraulic pressure supplied from the operation valves 16 and 17 causes the rotation. The motor 18 is rotated, and the driver's cab body 4 is driven to rotate. At the same time, the rotation of the upper revolving body 2 is detected by a rotation detector (not shown) and inputted to the control circuit 15, and a signal corresponding to the rotation speed is sent to the control circuit 15.
The signal is output to the operating valve 17, and the driver's cab body 4 is moved back and forth in synchronization with the rotation of the upper rotating structure 2.

For example, when the upper rotating body 2 rotates to the right from the position shown in FIG. 4A and reaches the position shown in FIG. It will be pushed back as much as possible. Thereafter, when the cab body 4 is further turned to the position shown in FIG. As a result, upper rotating body 2
Even if the driver's cab body 4 is turned, the operator's cab body 4 only changes direction at approximately the same position, and the operator inside the driver's cab body 4 can be prevented from being swung left or right.

Effects of the invention As detailed above, in this invention, the operator's cab body 4 is suspended from the tip of the rotary arm 9 which is movably provided on the slide base 7 via the telescopic boom 12. When getting on or off the cab main body 4, by tilting the rotating arm 9 forward until the bottom of the cab main body 4 touches the ground, the cab main body 4
It becomes easier to get in and out of the vehicle. In addition, since the operator's cab main body 4 is located at the very front of the upper revolving structure 2 during work, the forward visibility is good, and especially when excavating a deep hole etc. with the work equipment 3, the tip of the work equipment 3 can be clearly seen. In addition to efficient excavation work, when the revolving structure 2 turns, the upper revolving structure 2 moves backward in conjunction with the rotation, so the distance from the center of rotation to the operator's cab main body 4 becomes smaller, and as a result, the distance between the operator's cab and the Since the driver inside the main body 4 is not shaken greatly, fatigue during work can be reduced.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, with FIG. 1 being a side view, FIG. 2 being a block diagram of the control system, and FIGS. 1 is the suspension, 2 is the upper revolving body, 3 is the work equipment,
4 is the operator's cab body, 5 is a guide rail, 6 is a driving means, 7 is a slide base, 8 is a rotating arm, and 9 is a telescopic boom.

Claims (1)

[Scope of utility model registration request] In a structure in which a working machine 3 and a driver's cab main body 4 are provided at the front part of an upper revolving body 2 which is rotatably provided on an undercarriage 1, a guide rail 5 is installed in the front and back direction on the upper revolving body 2, A slide base 7 is provided on this guide rail 5 and is movable back and forth by a drive means 6 in conjunction with the rotation of the upper revolving body 2. A rotating arm 8 that is movable forward and backward is provided on this slide base 7. The operator's cab of a power swivel is formed by hanging the upper part of the operator's cab main body 4 swingably from the tip of a rotating arm 8 via a telescopic boom 9.