JPS6319403Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an excavator such as a excavator that expands the working range by sliding the excavation device laterally.
This invention relates to a slide device for a drilling rig.

Conventionally, there are two types of horizontal sliding devices for excavation equipment using cylinders: one that uses one cylinder and one that uses two cylinders.
In the case of a book cylinder, in order to fully slide it, it is necessary to stop the slide at an intermediate position, return the cylinder, and attach/detach the pin that connects the slider and cylinder, which is a complicated and time-consuming process. In the case of such a system that uses two cylinders, the structure of the operation valve etc. becomes complicated and space is required for installing the cylinders.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a slide device for an excavator in an excavator that does not require a large space and is easy to operate.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a backhoe implementing the present invention, in which a guide 10 is provided on the side of a turntable 2 placed on a machine body 1, and a slider 9 is supported on this guide 10 so as to be slidable laterally. There is.
Slider 9 has boom 3, arm 4, and bucket 5.
An excavating device A is attached thereto, which includes a boom cylinder 6, an arm cylinder 7, and a bucket cylinder 8 for operating these.

As shown in FIG. 2, a multi-stage telescopic cylinder B is provided on the frame 32 of the turntable adjacent to the guide 10, and the multi-stage telescopic cylinder B is
The piston 11 is in sliding contact with the second piston rod 13 so as to slide in the axial direction, and the first piston 1
One end of a first piston rod 12 is fixed to 1,
The first piston rod 12 is the second piston rod 1
The tip of the second piston rod 13 protrudes from one end of the second piston rod 13, and the second piston 1
4 is fixedly installed, and the second piston 14 is in sliding contact with the inner peripheral surface of the cylinder tube 15 so as to slide in the axial direction within the cylinder tube 15 provided on the outer periphery of the second piston rod 13. Both ends are cylinder tubes 15
The second piston rod 13 protrudes from both ends of the second piston rod 13 when the second piston rod 13 is in the most contracted state.
The distal end surface of the second piston rod 13 is configured to be approximately flush with the distal end surface of the cylinder tube 15, and the rear end surface of the second piston rod 13 is approximately flush with the rear end surface of the cylinder tube 15 when the second piston rod 13 is in the most extended state. , an oil chamber E on the extension side of the cylinder tube 15 and a second oil chamber are provided on the outer periphery of the second piston rod 13.
Port 2 that communicates with the oil chamber in the piston rod 13
5 and a port 26 that communicates the contraction side oil chamber F of the cylinder tube 15 with the oil chamber in the second piston rod 13 are provided on both sides near the second piston 14, and the extension side oil chamber C of the second piston rod is provided on both sides of the second piston rod 13. A port 23 provided in the first piston 11, a pipe line 21 provided in the first piston rod 12, a port 19 and a pipe 30 provided at the tip of the first piston rod 12 communicate with the directional control valve 27, and the second piston rod 13 The reduction side oil chamber D is connected to a directional control valve 27 by a port 24 provided at the base of the first piston rod 12, a pipe 22 inside the first piston rod 12, a port 20 and a pipe 31 provided at the tip of the first piston rod 12. The second
The pressure receiving area of the piston 14 is formed to be larger than the pressure receiving area of the first piston 11, the tip of the first piston rod 12 is pivotally connected to brackets 16, 16 fixed to the end of the frame 32, and the cylinder tube 15 is attached to the brackets. 18 to the slider 9, and the cylinder tube 15 is fixed to the frame 32.
The cylinder tube 15 is installed on cylinder guides 17, 17 fixed to the upper surface of the cylinder parallel to the guide 10, and the cylinder tube 15 slides along the cylinder guides 17, 17.

Directional switching valve 27 connects pump 28 and reservoir 29
The multi-stage telescopic cylinder B expands and contracts by switching the directional switching valve 27.

With the above configuration, when the directional control valve 27 is switched to the extension side, pressure oil is supplied to the extension side oil chamber C of the second piston rod 13.
and the cylinder tube 15 are integrally moved to the right in FIG. 2 relative to the first piston rod 12, so that the first piston 11 moves to the second
The port 25 is located approximately in the center of the piston 13.
The oil chamber C and the oil chamber E communicate with each other, and the pressure oil supplied to the extension side oil chamber E of the cylinder tube 15 through the port 25 causes the cylinder tube 15 to move to the right side in FIG. 3 with respect to the second piston rod 13. As the cylinder tube 15 moves, the cylinder tube 15 reaches the stroke end as shown in FIG. Moving to the right in FIG. 4, the multi-stage telescopic cylinder B reaches its maximum extension as shown in FIG. located at the end of the guide 10 on the opposite side to the side where the

When the directional control valve 27 is switched to the contraction side, the multi-stage telescoping cylinder B operates in the complete opposite manner to the expansion and contraction due to the pressure oil supplied to the contraction side oil chamber D of the second piston rod 13, and the slider 9 moves to the contraction side. 1 is located at the end of the guide 10 on the side to which the piston rod 12 is pivoted, returning to the state shown in FIG.

As described above, the present invention uses one cylinder and allows the drilling equipment to slide over a large stroke simply by operating the directional control valve, and the piping to the cylinder is easy. The present invention provides a slide device for an excavator that does not require a large space and is easy to operate.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a bucket hoe, Fig. 2 is a partially sectional plan view of the slide device, and Figs. 3, 4, 5, and 6 are the slide devices. FIG. A...Drilling equipment, B...Multi-stage telescopic cylinder, 9
...Slider, 11...First piston, 12...
1st piston rod, 13...2nd piston rod, 14...2nd piston, 15...cylinder tube, 25, 26...port, 32...frame.

Claims (1)

[Scope of utility model registration request] A first piston, a first piston rod having one end fixed to the first piston, a second piston rod in sliding contact with the first piston so as to slide in the axial direction on the inner circumference, and an outer circumference of the second piston rod. A fixedly installed second piston, a cylinder tube in sliding contact with which the second piston slides in the axial direction on the inner periphery, an oil chamber on the expansion and contraction side of the cylinder tube, and an oil chamber in the second piston rod. a pair of ports provided on both sides near the second piston on the outer periphery of the second piston rod, and a pair of ports provided at the tip of the first piston rod, communicating with each other;
A port provided in the piston and a port provided in the extension side oil chamber of the second piston rod via a conduit provided in the first piston rod, and a port provided in the tip of the first piston rod and provided in the base of the first piston rod. and a port that communicates with the contraction side oil chamber of the second piston rod through a conduit in the first piston rod, and the ports provided at the tips of the first piston rod are connected to each other by piping through a directional control valve. The tip of the first piston rod of a double-acting rod-type multi-stage telescopic cylinder that communicates with the pump and the reservoir is attached to one end of the frame, and the slider to which the drilling equipment is attached slides laterally on the side of the frame. A slide device for an excavator in an excavator, characterized in that it is fixed to a tube.