JPH09105143A - Back dozer mounting device in tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to mount a back dozer without remodeling a tractor dramatically. SOLUTION: A working machine B of a cultivating device or the like is removably mounted on a mounting part 2 of a three point mechanism 10 set up in the rear part of a tractor A. In the tractor, which operates a lift height under control by moving vertically the three point link mechanism 10 with an operation lever 1L, a back dozer 3 is removably mounted on the mounting part 2 of the three point link mechanism 10. A hydraulic cylinder 35 for turning a bucket 31 of this back dozer 3 is removably mounted on a hydraulic coupler 1U which operates a horizontal control hydraulic cylinder 11U provided on a lower link 11 of the three point link mechanism 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backdozer mounting structure for a tractor, which allows a backdozer to be removably mounted on a tractor having a three-point link mechanism.

[0002]

2. Description of the Related Art Conventionally, a working machine such as a cultivator is attached to a three-point link mechanism installed at the rear part of a tractor body to carry out cultivating work, and a bucket is provided to perform a pushing work or a soil carrying work. A tractor with a dozer work machine for performing work (hereinafter referred to as "dozer work") is well known, and such a tractor dozer work machine is mounted on the front part of the tractor by attaching a mounting frame to the tractor and separately. A dozer operation is performed by connecting a hydraulic cylinder for vertically moving and rotating a bucket to the hydraulic outlet of a hydraulic valve provided exclusively for the bucket.

[0003]

However, the tractor for performing the dozer work having the above-mentioned conventional structure is costly because the dozer work machine is attached to the tractor main body by providing the mounting frame and hydraulic equipment which are specially constructed separately. It becomes high and becomes an obstacle when cultivating work. Therefore, when it is desired to remove this, there is a problem that complicated work such as removing a large number of bolts is required and it takes time to attach and detach.

[0004]

According to the present invention, a working machine B such as a cultivator is attached to a mounting portion 2 of a three-point link mechanism 10 of a tractor A.
In the tractor in which the work machine B is detachably mounted and the three-point link mechanism 10 is moved up and down by the operating lever 1L to adjust the elevation height, the back dozer 3 is attached to the mounting portion 2 of the three-point link mechanism 10. Is detachably mounted, and the hydraulic cylinder 35 for rotating the bucket 31 of the back dozer 3 operates the hydraulic cylinder 11U for horizontal control provided on the lower link 11 of the three-point link mechanism 10. It is configured to be detachably connected to.

The mounting portion 2 of the three-point link mechanism 10 is also described.
The cultivating device B having the toolbar 5 is mounted on the tool bar 5, and the back dozer 3 is attached to the tool bar 5.

[0006]

Embodiments of the present invention will be described with reference to the drawings. The tractor A is equipped with an engine section 1e and a control section 1s from the front on a machine body 1 having front and rear wheels 1a and 1b. At the rear part of the machine body 1, a working machine B such as a tiller is provided.
Is attached via a mounting portion 2 (a mounting portion of the working machine capable of mounting the working machine with one touch) which will be described later.
A three-point link mechanism 10 that is vertically moved up and down by an operation lever 1L provided on S is provided, and a back dozer 3 having the attachment / detachment mechanism of the present invention is detachably attached to the attachment portion 2.

The three-point link mechanism 10 and the mounting portion 2 are constituted by the known mechanism shown in FIG. 5, and the three-point link mechanism 10 is a lower portion of the body 1 which is rotatably supported by projecting rearward. The lift arm 12 and the lift rod 1 are hydraulically moved up and down by operating the operating lever 1L.
Top link bracket 14 and top link 20 in which the top hook 20 of the attachment portion 2 supported by the lower link 11 is projected above the rear portion of the machine body 1
5 are connected to form a closed link.

The mounting portion 2 has a hook-shaped receiving portion 21a with a lock piece 22 that is open upward on the receiving plate 21 supported by the lower link 11, and the receiving portion that is open upward on the top hook 20. 20a, and the support frames 30 of the back dozer 3 are provided on the receiving portions 21a and 20a.
With the mounting rods 30a and 30b provided on the upper and lower sides corresponding to each other and fitted together, one mounting rod 30a is operated.
With the a and 30b fitted in correspondence with each other, the one mounting rod 30a is hooked by the lock piece 22 by the operation of the operating tool 22a, so that the back dozer 3 is easily attached and fixed. There is.

Incidentally, when removing the mounted dozer 3, the mounting portion 2 is lowered through the three-point link mechanism 10 while the lock piece 22 is moved upward, so that the receiving portion 21a,
It is simply performed by disengaging the engagement between the mounting rods 30a and 30b and the mounting rods 20a and 30b. As shown in FIGS. 1 and 6, the lower link 11 and the lift arm 12 on the left side are connected via a hose 1H from a hydraulic outlet (hydraulic coupler) 10 that communicates with a hydraulic device provided on the machine body 1 side. It is connected by a hydraulic cylinder 11U for horizontal posture control of the working machine B to be operated. In addition, 1K shown in FIG. 7 is the hydraulic coupler 1U.
Is an auxiliary coupler that temporarily supports when the hose 1H installed below is removed.

Next, referring to FIGS. 2 and 3, the back dozer 3
Will be described. Reference numeral 31 is a bucket that is movably supported by a support shaft 32 via a bracket at the lower front end of the support frame 30, and 33 is both support frames 30, 30.
It is a horizontal frame having the attachment rod 30b connecting between the two.
Further, 35 is a mounting shaft 33a of the horizontal frame 33 and the bucket 31.
The hydraulic cylinder 11U is mounted on the mounting shaft 31a, and the hydraulic cylinder 11U is operated by connecting the joints 3J, 3J of the hoses 3H, 3H provided on the cylinder portion to the hydraulic outlets 1U, 1U. Operation tool 1
The bucket 1 is expanded and contracted to adjust the rotating posture of the bucket 31.

With the above-mentioned mounting structure, the back dozer 3 can easily and accurately mount the upper and lower mounting rods 30a and 30b to the mounting portion 2 of the three-point link mechanism 10, and thus the back dozer 3 can be mounted like a conventional back dozer. It is not necessary to provide a special mounting frame or supporting means on the tractor, and a backdozer using the tractor can be easily constructed. That is, as shown in FIG. 3, in the back dozer 3 attached to the mounting portion 2 of the three-point link mechanism 10, the hydraulic cylinder 35 having the hose 3H connected to the hydraulic coupler 1U operates the operating tool 11L to expand and contract. By operating it, the bucket 31 can be set to a desired rotation angle, and the lift arm 12 that moves up and down by the operation lever 1L sets the bucket 31 to an appropriate height via the three-point link mechanism 10. The back-dozer work can be performed easily and satisfactorily by directly using the hydraulic operation mechanism of the working unit originally owned by the above without changing it significantly.

Next, another embodiment of mounting the back dozer 3 will be described with reference to FIGS. That is, the back dozer 3 configured as described above is the three-point link mechanism 1
It may be detachably attached to the tilling device (working machine) B attached to the mounting portion 2 of 0. In this case, the toolbar 5 protruding toward the rear of the tilling device B is attached to this toolbar 5. Back dozer 3 formed in a U shape so that it fits
It is preferable that the back dozer 3 can be easily attached to the tractor A by inserting the mounting portion 30c of 1 and setting both of them with the stop pin 51. Note that 52
Is a stay that connects the tool bar 5 and the support frame 30.

[0013]

According to the invention of claim 1, the back dozer 3
Of the tractor A is easily mounted via the mounting portion provided in the three-point link mechanism 10, and the bucket 31 of the backdozer 3 is provided in the hydraulic cylinder 11 of the three-point link mechanism 10.
By hydraulically operating the structure in which the hydraulic coupler 1U is provided in U, the three-point link mechanism 10 originally possessed by the tractor A is not substantially modified.
With a simple structure, it can be easily attached and detached.

According to the second aspect of the present invention, the back dozer 3 is detachably attached to the tool bar 5 of the tiller mounted on the mounting portion of the three-point link mechanism 10. Therefore, the back dozer 3 is integrated with the tiller. In this state, the tilling work and the back dozer work can be efficiently performed as desired, and the back dozer 3 can be easily attached and detached via the toolbar 5.

[Brief description of the drawings]

FIG. 1 is a plan view of a tractor to which a back dozer is attached.

FIG. 2 is a perspective view of a back dozer.

FIG. 3 is a side view showing a state in which a back dozer is attached to a rear portion of the tractor.

FIG. 4 is an operational view of the device shown in FIG.

FIG. 5 is a side view with the back dozer removed from the mounting portion.

FIG. 6 is a rear view of the tractor.

FIG. 7 is a side view of a hydraulic coupler.

FIG. 8 is a plan view showing another embodiment of the mounting portion of the back dozer.

9 is a perspective view of the back dozer of FIG. 8. FIG.

FIG. 10 is a side view showing a mounted state of the back dozer.

[Explanation of symbols]

1 Airframe 1U Hydraulic coupler 1L Operating lever 2 Mounting part 3 Back dozer 5 Toolbar 10 Three-point link mechanism 11 Lower link 11L Operating tool 11U Hydraulic cylinder 31 Bucket 35 Hydraulic cylinder A Tractor B Tiller

Claims (2)

[Claims] 1. A work machine B such as a cultivator is detachably attached to a mounting portion 2 of a three-point link mechanism 10 of a tractor A, and the work machine B is moved up and down by an operating lever 1L. In the tractor for adjusting the ascending / descending height, the back dozer 3 is detachably attached to the mounting portion 2 of the three-point link mechanism 10, and the hydraulic cylinder 35 for rotating the bucket 31 of the back dozer 3 is A backdozer mounting structure for a tractor that is detachably connected to a hydraulic coupler 1U that operates a hydraulic cylinder 11U for horizontal control provided on a lower link 11 of a three-point link mechanism 10. 2. The backdozer mounting structure for a tractor according to claim 1, wherein the tiller B having a toolbar 5 is mounted on the mounting portion 2 of the three-point link mechanism 10, and the backdozer 3 is mounted on the toolbar 5.