JPH0138155Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a work equipment mounting device that allows a lifting work machine such as a forklift to be mounted on a tractor in place of a ground work machine such as a rotary tiller.

(Prior art) A work equipment mounting device for a tractor is configured by combining a hydraulic system and a link mechanism, especially a three-point link mechanism, and the lift arm of the hydraulic system and a pair of left and right lower links are connected by a lift rod. The work equipment connected to the lower link is attached to be towed so that it can be raised and lowered freely.

The lift rod is installed depending on the work machine to which it is installed.
It is used as a hydraulic lift cylinder. In other words, if the work equipment is a lifting work equipment that is lifted from the ground, such as a forklift or an aerial work device, it would be a problem if the work equipment tilted to the left or right, so a lift rod that does not extend or contract is used, and a rotary tiller or In the case of a ground-based work machine such as a plow, a hydraulic lift cylinder is used to enable the work machine to tilt left and right with respect to a tractor and to horizontally control the work machine.

(Problems to be Solved by the Invention) The above-mentioned mounting device that has a hydraulic lift cylinder and can attach a ground-based work machine is a mounting device that allows a lifting machine to be mounted by simply using a lift rod instead of the hydraulic lift cylinder. Conventionally, it was used as a device, but when the hydraulic lift cylinder is removed, its hydraulic hose is also separated from the tractor, and even though a coupler is attached to the hydraulic hose, a large amount of oil leaks. At the same time, it was difficult to store the hydraulic lift cylinder.

(Means for Solving the Problems) In view of the problems of the conventional device, the present invention is designed to provide a system in which the tractor 1 and the hydraulic hose 28 are connected to the lift rod 12 of the mounting device 13 for the lifting machine 15. All of these problems can be solved by attaching the hydraulic lift cylinder 21 in a detachable manner.

That is, the specific configuration of the problem solving means in the present invention is that the lifting machine 15 is attached to the tractor 1 via a pair of left and right lower links 11, and the left and right lower links 11 and the lift arm 8 of the hydraulic device 7 are connected to the lift rod 12. In the work equipment mounting device connected through It is characterized in that it can be attached and detached with 28 connected.

(Function) Like the conventional device, the lift rod 12 is involved in mounting and raising/lowering the lifting work equipment 15, and the hydraulic lift cylinder 21 installed on the lift rod 12 has a hydraulic hose 28 not separated from the tractor 1, and is not attached to the ground work equipment. The hydraulic lift cylinder 21 can be removed from the lift rod 12 and the lift arm 8 can be replaced in place of the lift rod 12.
When connected to the lower link 11, the mounting device 13
is for mounting on ground-based work equipment.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a tractor, which is a two-axle, four-wheel type tractor having front wheels and rear wheels 3.

Reference numeral 4 denotes a control device, which is composed of a handle 5 and a driver's seat 6, and can be freely changed between a forward driving position (imaginary line) and a backward driving position (solid line), as shown in FIG.

A hydraulic system 7 is attached to the rear of the vehicle body and has a pair of left and right lift arms 8.

9 is a three-point link mechanism, and top link 10
and a pair of left and right lower links 11, one end of each link being pivotally supported by the vehicle body.

Incidentally, in this embodiment, the top link 10 is constituted by a telescoping cylinder.

Reference numeral 12 denotes a lift rod, which connects the lift arm 8 and the lower link 11. When the lift arm 8 is moved up and down, the three-point link mechanism 9 is moved up and down accordingly. The three-point linkage mechanism 9 constitutes a mounting device 13 together with the hydraulic device 7 and the lift rod 12.

Reference numeral 15 denotes a lifting machine, which is a forklift in this example, and the other end of each link of the three-point link mechanism 9 is removably pivoted to the machine frame 16. The work tool 1 is attached to the machine frame 16 via a lifting platform 17.
8. In this example, the fork can be raised and lowered by an unillustrated drive device (such as a motor).

A hydraulic lift cylinder 21 is detachably attached to one of the lift rods 12 and can be used in place of the lift rod 12. That is, the hydraulic lift cylinder 21 has a fitting part 24 at the upper end of the cylinder body 22 that can fit into the pin 23 of the lift arm 8, and a lower link 11 at the lower end of the piston rod 25.
It has a bifurcated connecting part 27 that can be connected via a pin 26, and when a ground work machine such as a rotary tiller is installed in place of the lifting work machine 15, the lift arm 8 and the lower link 11 can be connected. provided in between to enable horizontal control of ground-based implements.

Hydraulic hose 28 of the hydraulic lift cylinder 21
is connected via a coupler 30 to a hydraulic hose 29 connected to a hydraulic pump and valve device (not shown) of the tractor 1, and is in a connected state in which pressure oil can be supplied.

The lift rod 12 includes a pin 32 into which the fitting portion 24 of the hydraulic lift cylinder 21 can be fitted, and a pin 33 into which the pin hole 27a of the bifurcated connecting portion 27 can be fitted.
are protruding from each other, and the hydraulic lift cylinder 2
1 has a fitting part 24 and a pin hole 2 for each pin 32, 33.
7a is fitted and secured with a retaining pin.

In the second embodiment shown in FIG. 4, a square frame member 3 is provided at the bottom of the lift rod 12 instead of the pin 33.
4 is welded to hold the bifurcated connecting portion 27 of the hydraulic lift cylinder 21.

In the third embodiment shown in FIG. 5, a U-shaped member 35 made of spring steel is fixed to the middle part of the lift rod 12 so as to sandwich the cylinder body 22 of the hydraulic lift cylinder 21.

In the second and third embodiments, malfunction of the hydraulic lift cylinder 21, that is, the hydraulic lift cylinder 21
Even if pressure oil is accidentally supplied to the piston rod 25, it is configured to allow the piston rod 25 to expand and contract.

Note that the upper holding part for mounting the hydraulic lift cylinder 21 provided on the lift rod 12 may have a long pin 23 instead of the pin 32, and the lower holding part may have the pin 33, the square frame member 34, U
Instead of the shape member 35, members of other shapes may be used.

Further, it is preferable that the hydraulic lift cylinder 21 is provided with a holding portion for detachably attaching an unused lift rod 12 when the hydraulic lift cylinder 21 is used.

(Effect of the invention) According to the invention detailed above, the lifting machine 1
Lift rod 12 of mounting device 13 with 5 attached
Since the hydraulic lift cylinder 21 used when the ground work machine is attached is detachably attached to the hydraulic lift cylinder 21, it is easy to store and handle the hydraulic lift cylinder 21 when not in use. Since the hydraulic hose 28 remains connected to the tractor 1, there is no need to separate and connect the hydraulic hose 28, and there is no fear of oil leakage.

[Brief explanation of drawings]

Figures 1 to 3 show the first embodiment of the present invention, where Figure 1 is a rear view, Figure 2 is an enlarged perspective view of the main parts, Figure 3 is a side view of the lifting machine installed, and Figure 3 is a side view of the lifting machine installed. Figures 4 and 5 are enlarged perspective views of essential parts showing second and third embodiments of the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Tractor, 7... Hydraulic device, 8... Lift arm, 11... Lower link, 12... Lift rod, 13... Mounting device, 15... Lifting work machine, 21... Hydraulic lift cylinder, 28... ...Hydraulic hose, 32, 33...pin.

Claims (1)

[Scope of utility model registration request] A lifting machine 15 is attached to the tractor 1 via a pair of left and right lower links 11, and the left and right lower links 1
1 and a lift arm 8 of a hydraulic system 7 are connected via a lift rod 12.
A work equipment installation characterized in that a hydraulic lift cylinder 21 for horizontally controlling a ground work equipment when it is installed instead of 5 is detachably installed while the tractor 1 and hydraulic hose 28 are connected. Device.