JP3217295B2 - Cover joint structure of folding agricultural work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a work part on both left and right sides of a center part which can be folded toward the center part.
The present invention relates to a cover joint structure of a folding agricultural working machine in which a cover end portion of a central portion and a cover end portion of a left and right working machine portion are wrapped in a working state in which left and right working machine portions are deployed.

[0002]

2. Description of the Related Art Conventionally, a central portion in the longitudinal direction of an agricultural work machine is mounted on a rear portion of a tractor via a three-point link hitch mechanism so as to be able to move up and down, and power is transmitted from the tractor to the central portion of the agricultural work machine. 2. Description of the Related Art There is a well-known agricultural working machine in which a working machine portion extending to both left and right sides from the center portion can be folded toward the center portion. Then, the left and right working machine parts are folded toward the center part side, so that the left and right working machine parts are unfolded in a working state, and a mutual end is formed between the center end cover end and the left and right working machine part cover ends. There is a gap that does not abut the gap.

[0003]

In the working state where the left and right working machine parts are deployed as described above, a gap is formed between the cover end of the central part and the cover end of the left and right working machine parts. Therefore, when the agricultural working machine performs the work, the mud that has been tilled, crushed, and scraped in the working portion leaks upward from the gap between the covers and scatters. For this reason, there has been a problem that the work finish in the field is deteriorated and that the upper surface of the agricultural work machine is soiled with mud.

The present invention eliminates the gap between the cover end portion of the central portion and the cover end portions of the left and right working machine portions in a plan view, and prevents mud from the working portion from leaking above the cover and scattering. Another object of the present invention is to provide a cover joint structure of a folded agricultural working machine that improves the work finish in a field and prevents the upper surface of the farm working machine from being soiled with mud.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tractor having a longitudinally central portion mounted on a rear part of a tractor via a three-point link hitch mechanism. In the agricultural working machine, the power is transmitted to the central part of the agricultural working machine from the central working part, and the working machine part extending to the left and right sides from the central part with respect to the central part is foldable toward the central part, respectively. The machine is divided into three parts, a central part and a left and right working machine part, and the left and right ends of the central part and the inner ends of the left and right working machine parts are connected by a rotation fulcrum so as to be substantially 180 ° rotatable, The upper part of each working part is covered with a cover, and when the left and right working machine parts are developed into a working state, the cover end of the central part and the cover of the left and right working machine parts are wrapped in a plan view. It is characterized by a door.

[0006]

With the above construction, the cover joint structure of the folding agricultural working machine according to the present invention is such that when the left and right working machine parts are deployed in the working state, the cover end of the central part and the covers of the left and right working machine parts are viewed in plan. This prevents the mud from the working part from leaking upward from the cover joint and scattering. As a result, the work finish of the field is improved,
Do not pollute the top surface of the farm work machine with mud.

[0007]

Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In the figure, reference numeral 1 indicates that the length in the left-right direction is long (3770 m in this embodiment).
m) It is a scraping halo having a crushing and scraping function. Although not shown, a connecting portion 2 for connecting to a tractor, which is not shown, is connected to a well-known three-point link hitch mechanism including a top link and a lower link of the tractor. 1 is attached to the rear of the tractor so as to be able to move up and down. Also, the input shaft 3 is provided from the PTO shaft of the tractor to the transmission gear box 3 provided at the front center of the substitute harrow 1 via a universal joint, a transmission shaft and the like.
Power is transmitted via a.

The substitute harrow 1 has a central portion 4 (length = 19).
00 mm) and left and right working machine parts 5L, 5R (length = 9 each)
30 mm), and the left and right ends of the central portion 4 and the inner ends of the left and right working machine portions 5L and 5R are connected by rotating shafts (rotation fulcrums) 6 and 6 so as to be able to rotate substantially 180 °. The back surface 4a of the central portion 4 and the left and right working machine portions 5
The back surface 5La, 5Ra of L, 5R is foldable so as to overlap. As shown in the drawing, the length of the left and right working machine parts 5L and 5R is approximately half the length of the central part 4. Since the working machine parts 5L and 5R are symmetrical and have the same configuration, only one working machine part 5L will be described.

Transmission frames 8 and 8a are provided on both left and right sides of the gear box 3 and serve as a main body frame and include transmission shafts 7 and 7a. From the transmission frames 8 and 8a, the chain transmission case 9 is located at the rear of the tractor tire T in the central portion 4 and at the outer end of the working machine portions 5L and 5R.
Is hanging. A rotary shaft 11 is suspended between the lower end of each of the chain transmission cases 9 and the lower end of a support frame 10 vertically suspended from the transmission frames 8, 8a so as to face the chain transmission case 9. On the circumference of the rotary shaft 11, a large number of soil crushing / scraping claws 12 are attached, and
The data 13 is constituted.

A dog clutch 14 is provided at a portion where the shaft ends of the transmission shafts 7 and 7a face each other.
The dog clutch 14 is connected when the whole scratching harrow 1 is in the working state, and the dog clutch 14 is turned when the left and right working machine parts 5L, 5R are turned around the rotation shaft 6 and folded on the central part 4. Is disconnected. Soil crushing and scraping rotor 1
The upper part of 3 is covered with a shield cover 15 supported by the main body frame, and at the rear end of the shield cover 15, the upper end of an apron 16 pivotally supporting a leveler (flat plate) 17 at the rear end position. It is pivotally mounted so as to be rotatable vertically. The folded opposing portions of the leveler 17 are connected by a hinge 18 that rotates about an axis substantially equal to the axis of the rotating shaft 6. Further, the leveler 17 can be displaced between a leveling position for leveling the soil and a soil collecting position for scraping the soil.

A guide plate 19 having a guide groove 19a is fixedly provided on the folding and rotating portion of the working machine portion 5L. A guide pin 20a which is inserted into the guide groove 19a at one end is provided above the guide plate 19. Having the other end in the central part 4
A rotary arm 20 which is rotatably supported by a shaft 20b so as to be rotatable in the left-right direction and is bent in a V-shape is provided between the transmission arm 8 and an intermediate portion of the rotary arm 20.
The work machine portion 5L is rotated between the work position and the folded position by the expansion and contraction operation of the hydraulic cylinder 21. When the working machine portion 5L is in the working position, it is locked by the lock device 22.

When the left and right working machine parts 5L and 5R are folded on the central part 4, stands 23 with wheels are detachably provided at the positions of the support frames 10 on the left and right ends of the central part 4. In addition, a residual tillage (at the ridge) processing device is provided at the lower front side of each of the chain transmission cases 9.

The shield cover 15 and the apron 16
Covers the working part of the central part 4 and the left and right working machine parts 5L,
The working portion of 5R is covered by shield covers 15L and 15R and aprons 16L and 16R. Lateral projections 4 are formed at the inner ends of the shield covers 15L and 15R facing the left and right ends of the shield cover 15 and the apron 16 in the central portion 4, and the left and right working machine portions 5L and 5L are formed.
When the 5R is deployed in the working state, it is wrapped by W in plan view. Also, aprons 16, 16L, 16
In R, side projections 26 are formed at both ends of the apron 16 and side projections 27 are also formed at the inner ends of the aprons 16L and 16R, so that the left and right working machine parts 5L and 5R are deployed in a working state. At this time, the projections 26 and 27 on both sides are wrapped by W in plan view.

As described above, the shield covers 15, 15
In the L and 15R and the aprons 16, 16L and 16R, when the left and right working machine parts 5L and 5R are deployed in the working state, both are wrapped by W in plan view.
When the scraper rotor 13 is performing the crushing and scraping work, mud is formed between the shield cover 15 and the shield covers 15L and 15R and between the apron 16 and the aprons 16L and 16R. , 15R and aprons 16, 16L, 16R. Therefore, the work finish in the field is improved, and the upper surface of the substitute scratch harrow 1 is not stained with mud.

[0015]

As described above, according to the cover joint structure of the folding agricultural working machine of the present invention, the agricultural working machine is divided into a central portion and left and right working machine portions, and the left and right ends of the central portion are separated from each other. When the inner ends of the left and right working machine parts are connected by a rotation fulcrum so as to be able to rotate substantially 180 °, the upper part of each working unit is covered with a cover, and when the left and right working machine parts are deployed to a working state, Since the cover end portion of the central portion and the covers of the left and right working machine portions are wrapped in a plan view, it is possible to prevent mud from the working portion from leaking upward from the joint of the cover and being scattered. as a result,
The work finish in the field is improved, and the upper surface of the farm work machine is not stained with mud.

[Brief description of the drawings]

FIG. 1 is a schematic rear view of an entire folding-type scrap harrow according to the present invention.

FIG. 2 is a schematic side view from the direction A in FIG. 1;

FIG. 3 is a schematic side view showing a state in which a substitute harrow is folded.

FIG. 4 is a schematic plan view from the direction B in FIG. 3;

FIG. 5 is a partial plan view of a substitute harrow according to the present invention.

FIG. 6 is a side view showing a state in which a substitute harrow is folded.

FIG. 7 is a partial plan view of a substitute harrow.

FIG. 8 is a partial plan view of the folding mechanism.

FIG. 9 is a partial plan view in a folded state.

10A is a sectional view of a shield cover, and FIG. 10B is a side view of FIG.

11A is a sectional view of an apron, and FIG. 11B is a side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Alternating harrow 2 Connecting part to tractor 3 Speed change gearbox 3a Input shaft 4 Central portion of altering harrow 4a Back of central portion 5L Left working machine portion 5R Right working machine portion 5La Back of left working machine portion 5Ra Right working machine Back of part 6 Rotating shaft (rotating fulcrum) 7, 7a Transmission shaft 8 Transmission frame 9 Chain transmission case 10 Supporting frame 11 Rotary shaft 12 Crushed soil / scraping claw 13 Crushed soil / scraping rotor 14 Dog clutch 15 Shield cover 16 Apron Reference Signs List 17 Leveler 18 Hinge 19 Guide plate 19a Guide groove 20 Rotating arm 20a Guide pin 20b Shaft 21 Hydraulic cylinder 22 Locking device 23 Stand with wheels 24 Side projection from shield cover of work machine part 25 Side plate of shield cover 26 Apron at central part Side projection from the 27 of the working machine part Tire W viewed lap portion of the cover of the lateral projections T tractor from prong

Claims (1)

(57) [Claims] 1. A longitudinally central portion of a farming machine is mounted on a rear portion of a tractor via a three-point link hitch mechanism so as to be able to move up and down, and power is transmitted from the tractor to a central portion of the farming machine. On the other hand, a working machine portion extending to the left and right sides from the center portion is a farm working machine that can be folded toward the center portion side, respectively. The farm working machine is divided into a central portion and left and right working machine portions by three. The left and right end portions of the central portion and the inner end portions of the left and right working machine portions are connected to each other so as to be rotatable by approximately 180 ° by a rotation fulcrum, and the upper portions of the working portions are covered with covers. Wherein the cover end portion of the central portion and the covers of the left and right working machine portions are wrapped in a plan view when the machine is deployed in a working state.