JPH053564Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is used in the field of preventing the rotation of a telescopic cylinder that is installed between the vehicle body side and the board and allows the board to slide along the rail. It is something.

(b) Prior art A conventional reciprocating telescopic cylinder operated by hydraulic oil is composed of a base barrel, a tip barrel built into the base barrel, and a rod built into the tip barrel. There are two-port types with a port on each rod and two ports on the rod only, but in these cases the disadvantage is that the internal structure of the cylinder is complicated, so the cylinder 2 ports on the base barrel to simplify the internal structure,
It is a 3-port type with one port on the barrel at the front.

(c) Problems to be solved by the invention Because of the above structure, the base barrel and rod of the telescopic cylinder are supported by the vehicle body and the base plate, respectively, so they do not rotate when the telescopic cylinder expands and contracts, or the tip part Since the barrel is not pivoted anywhere, it rotates, causing the rubber hose connected to the barrel at the tip to twist and eventually break.

(d) Means for solving the problem The present invention was made to solve the above-mentioned problem. ,
The space between the vehicle body side and the board is composed of a base barrel, a tip barrel built into the base barrel, and a rod built into the tip barrel. Ports are provided in the base barrel and the tip barrel, respectively, and each port is connected to the base barrel. A telescopic cylinder is provided which is reciprocated by supplying and discharging hydraulic oil, a protruding piece is provided on the tip barrel, and a guide member is provided on the base plate to guide the protruding piece along the expansion and contraction direction of the telescopic cylinder. That's what happened.

(e) Embodiment Hereinafter, an embodiment of the present invention will be explained based on the drawings. Reference numeral 1 denotes a subframe fixed on the vehicle body 2, and a hydraulic motor 3 is installed at the rear end of the subframe 1.
A swivel table 4 is provided, and a pair of front and rear rails 5 extending in the left-right direction are provided on the swivel table 4.
A rail member 6 having a number 5 is attached, and a flat board 7 having a mounting body attached to its upper surface is supported by the rail member 6 so as to be slidable in the left and right direction.

A telescopic cylinder 8 that slides the board 7 by expanding and contracting is provided between the rail members 6, 6 and the board 7, parallel to the rails 5, 5,
This telescopic cylinder 8 is composed of a base barrel 9, a tip barrel 10 housed inside the base barrel 9, and a rod 11 housed inside the tip barrel 10.The base barrel 9 side is connected to the rail member 6, and the rod 11 The side is attached to the board 7 with a bracket 12, respectively.
It is pivotally supported via 13.

Reference numeral 14 denotes a plate-shaped protrusion piece provided above the tip barrel 10, and this protrusion piece 14 is fitted into a pair of guide members 15, 15 provided below the base plate 7, so that the tip barrel 10 slides. At this time, the protruding piece 14 slides within the guide members 15, 15, and the protruding piece 14 is prevented from rotating.

A first port 17 and a second port 18 are provided at the base and the tip of the base barrel 9 of the telescopic cylinder 8, respectively, and a third port 19 is provided at the tip of the tip barrel 10. Rubber hoses 20 and 21 connected to the hydraulic motor 3 are provided at the first port 17 and the second port 18, and a rubber hose 22 is provided between the second port 18 and the third port 19, respectively.

In addition, 23 is a power unit attached to the front end of the subframe 1 and operates the hydraulic motor 3;
Reference numerals 4 and 25 are a boom device, which is a mounting body provided on the base plate 7, and a driver's cab.

By the way, in this embodiment, the base barrel of the telescopic cylinder is attached to the rail member, but it may be attached to the vehicle body side such as the subframe, and the base barrel is attached to the rail member and the rod is attached to the board. The rod may be attached to the board and the rod to the rail member.

Furthermore, although the number of barrels at the tip is one, it may be two or more.

The present invention has the above-mentioned configuration. Next, the operation will be explained. This work vehicle operates the hydraulic motor 3 by the power unit 23 and operates the boom device 24 to perform the hoe operation. The base plate 7 is made slidable in order to align the boom device 24, which is a mounting body, and the operator's cab 25 to the working position for hoe work.

First, in order to slide the board 7 to the left, hydraulic oil from the hydraulic motor 3 is supplied from the rubber hose 20 to the first port 17 .

Then, the tip barrel 10 extends and the second port 1
The hydraulic oil is discharged from the third port 19 to the rubber hose 21, and then the rod 11 is extended, the hydraulic oil is discharged from the third port 19 to the rubber hoses 22, 21, and the board 7 slides to the left along the rails 5, 5.

At this time, the base barrel 9 and the rod 11 are pivotally supported by the rail member 6 and the base plate 7 via the brackets 12 and 13, so they do not rotate, and the tip barrel 10 also has the projection piece 14 inside the guide member 15. It does not rotate because it slides.

Next, in order to slide the board 7 to the right, hydraulic oil is supplied from the rubber hose 21 to the second port 18 .

Then, the tip barrel 10 contracts and the first port 1
The hydraulic oil is discharged from the rubber hose 20 through the rubber hose 22, and then the hydraulic oil is supplied from the rubber hose 22 to the third port 19, the rod 11 contracts, and the first port 17
The hydraulic oil is discharged to the rubber hose 20 and the board 7
slides to the right along rails 5,5.

At this time as well, the tip barrel 10 does not rotate, as described above.

(f) Effect of the invention As explained in detail above, this invention provides a protrusion piece on the tip barrel of the telescopic cylinder provided between the vehicle body side and the board, and the protrusion piece slides on the board together with the tip barrel. Since a guide member is provided to prevent the protrusion from rotating when the telescopic cylinder is expanded or contracted, the rubber hose connected to the tip barrel will not be twisted and damaged due to rotation of the tip barrel when the telescopic cylinder expands and contracts.

[Brief explanation of the drawing]

Figure 1 is an overall view of a working vehicle equipped with the present invention, Figure 2 is a perspective view of the telescopic cylinder of the present invention, and Figure 3 is a perspective view of the telescopic cylinder of the present invention.
The figure is a sectional view of a telescopic cylinder. 2 is a vehicle body, 5 is a rail, 7 is a base plate, 8 is a telescopic cylinder, 9 is a base barrel, 10 is a tip barrel, 11 is a rod, 14 is a projection piece, and 15 is a guide member.

Claims (1)

[Scope of utility model registration request] In a work vehicle in which a board with a mounting body attached thereto is slidably provided along a rail on the vehicle body, a base barrel is provided between the vehicle body side and the board, a tip barrel inside the base barrel, and a tip barrel. The base barrel and the tip barrel each have ports, and a telescopic cylinder is provided for reciprocating movement by supplying and discharging hydraulic oil to each port, and the tip barrel is provided with a protruding piece. ,
The working vehicle includes a guide member provided on the base plate along the expansion/contraction direction of the telescopic cylinder and guiding the protrusion piece.