JP2553445Y2 - Tilling machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a power transmission system extending left and right from a gear box to a left and right working machine such as a rotary earth crushing and scraping device, which is mounted on a rear part of a tractor via a three-point link mechanism. The present invention relates to a tilling work machine that is configured to fold a working device portion including a rearward body.

[0002]

2. Description of the Related Art Conventionally, a long tilling machine, such as a rotary crusher / scraper, is mounted at the rear of a tractor through a three-point link mechanism, and is mounted on a tractor PTO shaft and from a tilling machine gearbox. Power is transmitted to the input shaft that protrudes forward, and the working equipment including the transmission system that extends to the left and right sides from the gear box is folded toward the rear of the machine so that it does not hinder movement or running outside the field. The tillage working machine is, for example,
No. 106, Japanese Utility Model Laid-Open No. 1-163907, Japanese Utility Model Laid-Open No. 2-1208, and the like. And
In these tilling implements of the prior art, a gap is formed in the opposing portion when the working device portion is expanded, at the gear box side end of the tilling shaft of the working device portion to be folded, which causes residual tillage. Therefore, there is a case in which a round bar projecting downward is provided on one of the frames of the opposing portion so that the remaining tillage treatment is performed. It is also considered that an inclined shaft is provided on one of the tilling shafts of this portion, and tilling claws are arranged on the outer periphery thereof to perform residual tilling.

[0003]

However, as described above, one of the frames facing the working device portion is
In the case where the round bar protruding downward is provided, the residual tillage treatment is not sufficiently performed, and the residual tillage still occurs.
In addition, when providing an inclined shaft on one of the tilling shafts of the opposed portion and providing a tilling claw on the outer periphery thereof to perform residual cultivation, residual cultivation can be eliminated, but production costs are significantly increased.
There was a problem. The present invention has been made to solve the above problems.

[0004]

In order to achieve the above-mentioned object, according to the present invention, a tilling work machine 3 is mounted on a rear portion of a tractor via a three-point link mechanism 1, and the tractor is driven from a PTO shaft.
Power is transmitted to an input shaft 6 protruding forward from a gear box 5 of the tilling work machine 3 so that a working device portion 8 including a transmission system 7 extending from the gear box 5 to both left and right sides can be folded toward the rear of the machine. In the tilling work machine 3, a support shaft 14 projecting from the center of the machine body in the width direction is extended to one of the inner ends of the working device portion 8 to be folded, on the side of the gear box 5 of the cultivation shaft 13. It is characterized in that a tilling claw 15 is disposed on the outer periphery of the rim 14.

[0005]

According to the present invention, the support shaft 14 protruding from the center of the machine body in the width direction is extended to one of the inner ends of the tilling shaft 13 on the gear box 5 side of the working device portion 8 to be folded. Since the tilling claw 15 is arranged on the outer periphery of the support shaft 14, the remaining portion of the opposing portion in the state where the working device portion 8 is expanded, that is, the center portion in the width direction of the body (the lower portion of the gear box 5) is removed. Can be almost eliminated. Moreover, the production cost does not increase much.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. 3 to 6, reference numeral 1 denotes a well-known three-point link mechanism provided at the rear of the tractor (not shown), which includes a top link and a lower link. The connecting portion 4 of the tilling machine (rotary earth crusher in this embodiment) 3 is automatically connected to the auto hitch arm 2 so that the tilling machine 3 is mounted. Also,
Power is transmitted from the PTO shaft of the tractor to an input shaft 6 protruding forward from a gear box 5 of the tilling machine 3 via a universal joint, a transmission shaft, and the like, not shown. The working device (rotary soil crushing device) portions 8 and 8 including the transmission systems 7 and 7 extending to the left and right sides from the gear box 5
In the state of being connected by the connecting link 11, the hinge portion 9,
Folded toward the rear of the aircraft by human power around 9,
It can be expanded. The working device portions 8 and 8 are provided with a fold lock fitting 8a for locking the working device portion 8 in a folded state and work lock fittings 8b and 8b for locking the working device portion 8 in a spread working state. .

The end of the working device portion 8 on the side of the gear box 5 is extended so that the lower side of the gear box 5 can be crushed. As shown in FIGS. 1 and 2, a support shaft 1 is attached to one of the tilling shafts 13, 13 supported by the support arms 12, 12.
4 is extended, an eccentric cultivating claw 15 is disposed on the outer periphery of the support shaft 14, the gap between the shield covers is covered with the overlapping cover 16, and when the working device portion 8 is expanded, both extended ends are close and continuous. It has become. Also, when the working device portion 8 is folded, the transmission systems 7, 7 are separated and the transmission is interrupted, and when the working device portion 8 is expanded, the transmission systems 7, 7 are separated.
7 is connected to be in a transmission state. Also, the working device part 8
Is equipped with a crushing rotor having a large number of crushing claws 10, 10.
The direction in which the body is folded rearward around the center is the input center line where power is transmitted from the PTO shaft of the tractor to the input shaft 6 of the tilling work machine 3, and the working device portion 8 of θ degrees (15 degrees in this embodiment). Are folded downward and downward with respect to the horizontal line.

When the tilling implement 3 is lowered by the three-point link mechanism 1 when removing the tilling implement 3 from the three-point link mechanism 1 of the tractor, the lower end 10a of the rear end 10a of the working unit 8 is first grounded. When the three-point link mechanism 1 is further lowered, the lower portion of the working device portion 8, that is, the entire lower portion of the working device portion 8 is grounded, and the auto hitch arm 2
, The connecting portion 4 of the tilling work machine 3 can be easily removed. The folding operation of the working device portion 8 can be performed with a small force in a state where the tilling work machine 3 is supported at a low position by the three-point link mechanism 1. Further, when the working device portion 8 is spread, the rear portion of the working device portion 8 is raised by raising the tilling work machine 3 by the three-point link mechanism 1, and can be easily spread.

In the tilling implement of the embodiment constructed as described above, when the tilling implement 3 is mounted on the three-point link mechanism 1 of the tractor and moves on a road or a narrow passage, the working device parts 8, 8 are used. In the state where is spread, it becomes an obstacle to traffic. Therefore, the working device portions 8 and 8 are rotated rearward from the hinge portions 9 and 9 and locked by the folding lock fittings 8a. At this time, the transmission systems 7, 7 are separated and the transmission is cut off. Further, when performing the crushing work, the folding lock fitting 8a is detached, the working device portion 8 is rotated and opened from the hinge portion 9 by human power, and locked by the working lock fittings 8b, 8b. At this time, the transmission systems 7, 7 are connected, and a power transmission state is established. In addition, both extended ends of the working device portions 8 and 8 are close to each other to form a single earth crushing rotor, and opposing portions of both extended ends are crushed by the eccentric tilling claws 15 and there is almost no residual tilling. The folding operation of the working device portion 8 can be performed with a small force in a state where the tilling work machine 3 is supported at a low position by the three-point link mechanism 1. When the working device portion 8 is expanded, the rear portion of the working device portion 8 is raised by lifting the tillage working machine 3 by the three-point link mechanism 1,
Can be easily spread.

An automatic hitch arm 2 is attached to the three-point link mechanism 1.
When the connecting portion 4 of the tilling work machine 3 is connected to the auto hitch arm 2 in a state in which the cultivation work is attached, the tilling work machine 3 (the working device portions 8, 8 may be in either a folded state or an expanded state). When the tractor is retracted on the ground and the upper hook of the auto-hitch arm 2 is hooked on the top mast 4a of the connecting portion 4 to raise the three-point link mechanism 1, the tilling work machine 3 is lifted and the auto-hitch arm 2 is lifted. A pair of left and right pin gripping portions at the bottom of the
4b are automatically engaged while approaching. When removing the tilling work machine 3 from the three-point link mechanism 1 of the tractor, when the tilling work machine 3 is lowered by the three-point link mechanism 1, first, the rear end lower part 10a of the working device portion 8 is grounded, and By lowering the point link mechanism 1, the lower end of the working device portion 8 is grounded, and the connection portion 4 of the tilling work machine 3 can be easily removed from the autohitch arm 2.

FIG. 7 shows a scraping and crushing operation state by the tilling machine 3 of the present invention, and the total length L of the tilling machine 3 is 340.
0mm, working part M of working equipment part 8, 8 is 1650m
m, the working portion N with the eccentric cultivation claw 15 is 50 mm, and the remaining tillage portion S corresponding to the support arms 12, 12 is 30 mm.
It is weak. Therefore, residual tillage S occurs only slightly less than 30 mm on both sides of the eccentric tilling claw 15 between the working device portions 8 and 8. For example, in the case of scraping and crushing work, there is no problem in the crushing and leveling. Does not occur. If this is the case where the support shaft 14 and the eccentric tilling claw 15 of the present invention are not provided, a residual tilling of approximately 100 mm will occur, and, as in the above-described conventional example, the cultivation will be directed downward to one of the opposing portions. It is much better than when a protruding round bar is provided.

[0012]

As described above, according to the tilling machine of the present invention, the tilling shaft 13 of the working device portion 8 to be folded can be used.
The support shaft 14 protruding at the center of the body in the width direction is extended to one of the inner ends of the gear box 5 side, and the tilling claw 15 is disposed on the outer periphery of the support shaft 14.
It is possible to perform almost uniform work with almost no residual tillage in the opposing portion (the center of the machine body in the width direction, the lower side of the gear box 5) when working with the working device portion 8 expanded. Moreover, the production cost does not increase so much and does not greatly affect the product price.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a partial sectional view of the same.

FIG. 3 is a side view of the working device according to the embodiment of the present invention in a folded state.

FIG. 4 is a plan view showing a state where the working device is expanded.

FIG. 5 is a plan view showing a state where the working device is folded.

FIG. 6 is a rear view of a state where the working device is expanded.

FIG. 7 is an explanatory diagram of a working state according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 3-point link mechanism of tractor 2 Auto hitch arm 3 Tilling work machine 4 Connecting part 5 Gear box 6 Input shaft 7 Power transmission system 8 Working device part 8a Folding lock fitting 8b Work lock fitting 9 Hinge part 10 Crushing soil 11 Connecting link 12 Support Arm 13 Tilling shaft 14 Support shaft 15 Eccentric tillage claw 16 Overlay cover

Claims (1)

(57) [Scope of request for utility model registration] 1. A three-point link mechanism (1) at a rear part of a tractor.
Cultivator (3) is installed via the
The power is transmitted from the shaft to an input shaft (6) projecting forward from a gear box (5) of the cultivator (3) ,
Transmission system (7) extending from gearbox (5) to both left and right sides
Working device part (8) including. In a tilling work machine (3) that can be folded rearward of the fuselage, the cultivating shaft (1 ) of the working device portion (8) to be folded is used.
On one of the gear box (5) side within the end of 3), the width of the machine body
Extending the support shaft (14) projecting toward the center, tilling claws (1 the outer periphery of the support shaft (14)
5) A tilling machine equipped with: