JPS5811121Y2 - Work equipment lifting device for tractors - Google Patents

Description

[Detailed description of the invention] The present invention is an agricultural tractor that can be operated up and down regardless of whether it is equipped with a rear working device such as a rotary tiller or a front working device such as a dozer blade. This relates to a working machine lifting device.

Conventionally, agricultural tractors have only been equipped with a hydraulic lift arm at the rear of the machine as a permanent lifting device for the machine, so in the case of front work machines such as dozer blades that are attached to the front of the machine, Either a special link mechanism must be installed on the belly of the aircraft to transmit the movement of the rear hydraulic lift arm to the front working equipment, or a separate hydraulic cylinder for the front working equipment must be installed at the front of the aircraft. In either case, the structure cannot be complicated, and installing the front implement requires advanced technology, so many users of agricultural tractors do not consider its original function. In reality, the versatility of the machine could not be fully utilized, and the reality was that it had no choice but to be used as a single-purpose machine that only performed tasks at the rear of the machine, such as plowing.

The present invention has been devised in view of the above-mentioned circumstances, and its purpose is to provide a pair of left and right pairs that can swing freely back and forth around a rotation fulcrum provided approximately in the center of the front and back of the fuselage. A beam is provided so that it can be alternately supported at the front and rear of the fuselage via a transfer support mechanism, and a lift arm is fixed to a rotating shaft pivoted between the tips of the pair of left and right vinyls, and a rotation shaft to which the lift arm is fixed is attached. By configuring the moving shaft to be rotatable in conjunction with a hydraulic cylinder attached to the beam, the rear working equipment attached to the rear of the machine can be raised and lowered by redirecting and supporting the pair of left and right beams to the rear of the machine. By simply transferring and supporting the beam to the front side of the machine body, the front work equipment attached to the front part of the machine body can be raised and lowered, thereby providing the agricultural tractor with its original function of versatility. can.

The present invention aims to provide a working machine lifting device for a tractor.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a frame of a tractor. At approximately the center of the frame 1, a pivot shaft 2 protrudes from the left and right sides and rotates. The base ends of a pair of left and right beams 3, 3 are attached to both ends of this pivot shaft 2, and the pair of left and right beams 3, 3 use the pivot shaft 2 as a rotation fulcrum. As a result, the aircraft can swing back and forth.

A boss 4 is provided at the tips of the pair of left and right beams 3, 3.
, 4 are integrally attached, and a rotation shaft 5 is rotatably supported between the bosses 4, 4, and both ends thereof protrude to the sides of the bosses 4, 4.

Lift arms 6.6 are integrally attached to the rotation shaft 5 on its left and right sides.

At the ends of the pair of left and right beams 3, 3, a stay 7.7 is rotatably mounted with bosses 8, 8 formed at one end thereof being pivotally connected to a protrusion of the rotation shaft 5.

Bosses 9, 9 are also integrally formed at the other end of the stay 7.7.

Further, a pivot boss 10 for pivotally supporting the stay 7.7 is fixed to the rear part of the frame 1, and a similar pivot boss 10' is fixed to the front part of the frame 1.
When the beams 3, 3 are directed rearward, the bosses 9, 9 of the stays 7.7 are pivoted to the pivot boss 10 with the pivot pins 11, and conversely, when the beams 3, 3 are moved forward, the stays 7. The bosses 9, 9 of 7 are pivotally supported by a pivot boss 10' with a pivot pin 11, so that the beams 3, 3 can be alternately supported in either the front or the rear.

In addition, if the pivot pin 11 is of a center-folding type as shown in the drawing, it can be easily inserted into the rear pivot boss 10 even if a side wheel interferes with the insertion.

Reference numeral 12.12 denotes a hydraulic cylinder that is connected to a pressure oil generating device and a control device provided at appropriate locations in the aircraft body through a flexible hydraulic hose, and the hydraulic cylinder 12.12
are attached to beams 3, 3, and their piston rods 1
3, 13 is a drive arm 14 fixed to the rotation shaft 5.
14, the rotation shaft 5 is rotated by a hydraulic cylinder 12.12, and the lift arm 6.6 is configured to move up and down.

Reference numeral 15 denotes a rotary tilling machine (rear working machine), which is pivotally attached to the rear part of the frame 1 so as to be vertically movable, and connected to the lift arm 6.1 through a lift rod 16.16. It is connected to the tip of 6 and suspended.

Further, the front working machine indicated by a chain line in FIG. 1 is a dozer blade 17.

In the configuration as described above, when installing a rear working machine, for example, a rotary tilling machine 15 as shown in the figure, on the tractor, the left and right beams 3, 3 should be directed rearward, and the bosses 9, 9 of the stays 7.7 should be pivoted. It is fixed to a support boss 10 with a pivot pin 11, and the beams 3, 3 are fixedly supported rearward.

Then, the rotary tiller 15 mounted on the rear part of the frame 1 as described above is connected to the tip of the lift arm 6.6 via the lift rods 16, 16.

Thus, the hydraulic cylinder 12.12 is actuated to rotate the rotation shaft 5.
If you rotate the lift arm 6 fixed to it,
．． 6 rotates up and down, and the rotary work machine 15 can be raised or lowered as desired.

The rear working machine is the rotary tilling machine 1 mentioned above.
5 is a typical example, but there are also plows, pest control machines, etc.

On the other hand, when attaching a front work implement to a tractor, for example, to attach a dozer blade 17 as shown in the figure, the dozer blade 17 is pivoted to the front part of the frame 1 so as to be vertically movable, and a pair of left and right beams are attached. 3,3 with the stay 7 facing forward.
Connect the bosses 9, 9 of 7 to the front pivot boss 10' with the pivot pin 11.
The beam 3.3 is fixedly supported in a posture facing forward.

Then, the dozer blade 17 is moved to the lift rods 16, 16.
If the dozer blade 17 is connected to the tips of the knot arms 6, 6 via the dozer blade 17, the dozer blade 17 can be raised or lowered as desired by the operation of the hydraulic cylinders 12, 12, as in the case of the rear working machine.

In addition to the above-mentioned dozer blade 17, the front working machines include various snow removers, carriers, and the like.

As described above, in order to attach a rear working machine or a front working machine to a tractor, all that is required is to shift and support the pair of left and right beams 3, 3 backward or forward, respectively, and either the rear working machine or the front working machine can be mounted on the tractor. They can be raised and lowered even in the case of a rear work machine or a front work machine, and can be installed extremely easily and quickly.

In short, the present invention enables a pair of left and right beams that can freely swing back and forth to the front and back of the fuselage around a rotation fulcrum provided approximately in the center of the front and rear of the fuselage to be alternately supported in the front and rear of the fuselage via a redirection support mechanism. A lift arm is fixed to a rotating shaft pivoted between the tips of the pair of left and right beams, and the rotating shaft to which the lift arm is fixed is rotatable in conjunction with a hydraulic cylinder attached to the beam. By supporting the pair of left and right beams toward the rear of the machine around the rotation fulcrum, the rear work equipment attached to the rear of the aircraft can be raised and lowered, and the beams can be moved around the rotation fulcrum to raise and lower the rear work equipment. It is possible to provide a work machine lifting device for a tractor that can raise and lower a front work machine attached to the front part of the machine body by transferring support to the front side of the machine body.

Therefore, the agricultural tractor can be provided with its original function of versatility.

In addition, as in the embodiment, the transfer support mechanism includes left and right stays pivotally attached to the tips of a pair of left and right beams, pivot bosses provided at the front and rear of the fuselage, and a lower end of the stay pivoted to either the front or rear. When configured with a removable pivot pin that selectively connects to the support boss, the left and right stays, which are pivoted to the tips of the left and right pair of beams, are effectively utilized.
A pair of left and right beams can be easily transferred and supported at the front and rear of the aircraft.

[Brief explanation of the drawing]

The drawings show an embodiment of the work equipment lifting device for a tractor according to the present invention, in which Fig. 1 is an overall side view of the tractor showing a state in which the work equipment is attached, and Fig. 2 is an overall perspective view of the tractor. 3 is a perspective view of the main parts of the tractor seen from the rear, and FIG. 4 is a perspective view of the main parts of the tractor seen from the front. In the figure, 1 is the frame of the tractor, 2 is a pivot shaft, 3, 3 is a pair of left and right beams, 5 is a rotation axis, 6, 6 is a lift arm, 7, 7 is a stay, 9, 9 is its boss, 10.10' is a pivot boss, 11 is a pivot pin, 12, 12 are hydraulic cylinders, 15 is a rotary work machine (rear work machine), 16.16 is a lift rod, 17 is a dozer blade (front work machine) It is.

Claims (2)

[Scope of utility model registration request] (1) A pair of left and right beams that can freely swing back and forth in the front and back of the fuselage centering on a rotation fulcrum provided at the center of the front and back of the fuselage are provided so that they can be alternately supported in the front and rear of the fuselage via a transfer support mechanism. A lift arm is fixed to a rotating shaft pivotally connected between the tips of a pair of left and right beams, and the rotating shaft to which the lift arm is fixed is configured to be freely rotatable in conjunction with a hydraulic cylinder attached to the beam. A working machine lifting device for a tractor, characterized by: (2) The transfer support mechanism is attached to the left and right stays that are pivoted to the tips of the left and right beams, the pivot bosses provided at the front and rear of the fuselage, and the lower end of the stay to either the front or rear pivot boss. A working machine lifting device for a tractor according to claim 1, which comprises a selectively connected and detachable pivot pin.