JP2004033225A - Method for folding agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for folding an agricultural implement with which folding can be carried out so as to opposing implement parts extending to both the left and the right sides relatively to the central part to the side of the central part, respectively and the operation is performed simply by expanding and contracting operation of a hydraulic cylinder. <P>SOLUTION: The method for folding the agricultural implement is carried out as follows. The agricultural implement 1 is trisected into the central part 4 and the left and the right implement parts 5L and 5R. The left and right ends of the central part 4 and the inner ends of the left and the right implement parts 5L and 5R are rotatably connected by nearly 180° with rotation fulcra 6, respectively. Guide pins 20a are secured to the left and the right implement parts 5L and 5R and the other end of a rotating arm 20 provided with a slidable guide groove 19a in which the guide pins 20a can be fitted and slid is axially supported on the side of the central part 4. The intermediate part of the rotating arm 20 is connected to the piston tip of the hydraulic cylinder 21 having the base end supported on the side of the central part 4. Thereby, the left and the right implement parts 5L and 5R can be folded/developed by expanding and contracting operation of the hydraulic cylinder 21 provided in each of the left and right sides. <P>COPYRIGHT: (C)2004,JPO

Description

  According to the present invention, a central portion in the longitudinal direction is attached to a rear portion of a tractor via a three-point link hitch mechanism so as to be able to move up and down, and working machine portions extending to the left and right sides with respect to the central portion are respectively folded toward the central portion. The present invention relates to a method of folding a farm work machine that has been made possible.

Conventionally, the central part of the length of the agricultural working machine is attached to the rear part of the 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 part of the agricultural working machine. Agricultural working machines are known in which working machine parts extending to both left and right sides from the central portion can be folded toward the central portion in order to shorten the lateral length of the machine body.

And, as a method of folding the left and right working machine parts with respect to the center part,
a. Fold the left and right working machine parts behind the central part.
b. The left and right working machine parts are folded so as to stand obliquely upward from the central part.
Such means are known.

A. In the case of (1), when traveling or moving with the agricultural work machine mounted on the tractor, the front-rear balance is poor, and the overhang to the rear becomes large, so that attention must be paid to a corner. b. In this case, the position of the center of gravity of the agricultural work machine becomes high, and there is a possibility that the agricultural work machine will fall over in the left-right direction when traveling while mounted on the tractor. In addition, the rear view of the tractor operator deteriorates. c. None of the left and right working machine parts can be folded / deployed 180 ° only by the expansion / contraction operation of the hydraulic cylinder.
There was a problem.

The present invention does not deteriorate the front-rear balance when traveling / moving with the agricultural work machine attached to the tractor, and does not increase the machine center of gravity position when the agricultural work machine is folded, and travels while mounted on the tractor. In this case, there is no danger of falling down in the left and right directions, and the left and right working machine parts can be folded and unfolded 180 ° only by the expansion and contraction operation of the hydraulic cylinder to solve the above-mentioned conventional problems. is there.

In order to achieve the above object, the present invention provides
A. At the rear of the tractor, a central part in the longitudinal direction of the agricultural work machine is attached via a three-point link hitch mechanism so as to be able to ascend and descend, and power is transmitted from the tractor to the central part of the agricultural work machine. In the agricultural work machine which can be folded to the center part side, the work machine part extending to the left and right sides from the part,
The agricultural working machine is divided into a central part and left and right working machine parts, and the left and right ends of the central part and the inner ends of the left and right working machine parts are connected to each other by a rotation fulcrum so as to be substantially 180 ° rotatable. At the same time, a guide pin is fixed to the left and right working machine parts, and the other end of the rotary arm provided with a guide groove in which the guide pin can be inserted and slidable is pivotally supported on the central part side, and The middle part is connected to the piston tip of a hydraulic cylinder whose base end is supported on the center part side, and the left and right working machine parts can be folded and deployed by the expansion and contraction operation of the hydraulic cylinders provided on the left and right respectively. I have.

I. A. , The agricultural work machine is divided into three parts: a central part and left and right work equipment parts, and the left and right ends of the central part and the inner ends of the left and right work equipment parts can be rotated by approximately 180 ° by a rotation fulcrum, respectively. A guide pin is fixedly mounted on the left and right working machine parts, and the other end of a rotating arm provided with a guide groove in which the guide pin can be inserted and slidable is pivotally supported on the center part side. The left and right working machine parts can be folded and unfolded by the expansion and contraction operation of the hydraulic cylinders provided on the left and right sides by connecting the piston tip of the hydraulic cylinder whose base end is supported on the center part side to the middle part of the rotating arm. When switching between the left and right working machine parts with respect to the central part of the agricultural working machine between the working position (deployed position) and the folded position by 180 °, the switching can be performed only by the expansion and contraction operation of the hydraulic cylinder. Therefore, the structure can be simplified.

Hereinafter, the best mode for carrying out the present invention will be specifically described with reference to the accompanying drawings.

In the drawing, reference numeral 1 denotes a scraping halo having a long length in the left-right direction (3770 mm in this embodiment) and a crushing and scraping function. Although not shown, a connecting portion 2 for connecting to a tractor, which is connected to a well-known three-point link hitch mechanism including a top link and a lower link of the tractor, is provided at a front portion of the substitute harrow. Numeral 1 is attached to the rear of the tractor so as to be able to move up and down. Further, power is transmitted 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 via an input shaft 3a.

The substitute harrow 1 is divided into a central part 4 (length = 1900 mm) and left and right working machine parts 5L and 5R (length = 930 mm each), and the left and right ends of the central part 4 and the left and right working machines The inner ends of the parts 5L, 5R are connected to each other by rotation shafts (rotation fulcrums) 6, 6 so as to be able to rotate substantially 180 °, and the back surface 4a of the central part 4 and the back surfaces 5La, 5L of the left and right working machine parts 5L, 5R are connected. 5Ra can be folded so as to overlap (face) with 5Ra. As shown in the drawing, the lengths of the left and right working machine parts 5L and 5R are approximately ほ ぼ of 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.

伝 Transmission frames 8 and 8a are provided on both left and right sides of the gear box 3 and serve as body frames and have transmission shafts 7 and 7a therein. From the transmission frames 8, 8a, the chain transmission case 9 is vertically disposed at the center portion 4 behind the tractor tire T, and at the working machine portions 5L, 5R at the outer ends. ing. 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 installed facing the chain transmission case 9 from the transmission frames 8, 8a. On the circumference of the rotary shaft 11, a large number of crushing / scraping claws 12 are attached to form a crushing / scraping rotor 13.

A dog clutch 14 is provided at a portion where the shaft ends of the transmission shafts 7 and 7a face each other. When the entire scratching harrow 1 shown in FIG. 1 is in a working state, the dog clutch 14 is connected to the left and right working machines. When the parts 5L and 5R are rotated about the rotation shaft 6 and folded on the central part 4, the dog clutch 14 is disconnected. The upper part of the crushing / removing rotor 13 is covered by a shield cover 15 supported by the main frame, and a rear end of the shield cover 15 is provided with an apron 16 pivotally supporting a leveler 17 at the rear end. The upper end 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 pin 20a is fixedly mounted on the folding and rotating portion of the working machine portion 5L, and has a guide groove 19a at one end above the guide plate 19, which is inserted into the guide pin 20a. The other end is provided on the center portion 4 side with a shaft 20b so as to be rotatable in the left and right direction by a shaft 20b, and a rotating arm 20 bent in a V-shape is provided, and a hydraulic cylinder is provided between an intermediate portion of the rotating arm 20 and the transmission frame 8. The working machine portion 5L is rotated between the working 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.

That is, the scraper harrow 1 is divided into a central part 4 and left and right working machine parts 5L and 5R, and rotates the left and right ends of the central part 4 and the inner ends of the left and right working machine parts. It is connected by a shaft 6 so as to be able to rotate substantially 180 °. A guide plate 19 having a guide pin 20a is fixed to the left and right working machine parts 5L and 5R, and the other end of the rotary arm 20 provided with a guide groove 19a at one end to be inserted into the guide pin 20a is connected to the other end. It is supported by the shaft 20b on the center part 4 side. A piston end of a hydraulic cylinder 21 having a base end supported on the center portion 4 side is connected to an intermediate portion of the rotary arm 20, and the left and right working machine parts 5 </ b> L and 5 </ b> R are folded and expanded by the expansion and contraction operation of the hydraulic cylinder 21. Making it possible.

When the left and right working machine parts 5L and 5R are folded on the central part 4, the stand with wheels 23 is detachably provided on the support frames 10 at the left and right ends of the central part 4. Further, a residual tillage treatment device is provided below each of the chain transmission cases 9.

By the means of the present invention, the central part in the longitudinal direction is attached to the rear part of the tractor via a three-point link hitch mechanism so as to be able to move up and down, and the working machine parts extending to the left and right sides with respect to the central part are each approximately 180 °. It is possible to provide a method of folding a farm work machine, which can be folded toward a central portion side, and the folding operation can be performed only by the expansion / contraction operation of a hydraulic cylinder.

FIG. 1 is a schematic rear view of the entire foldable creeping harrow according to the present invention. FIG. 2 is a schematic side view from a direction A in FIG. 1. It is a schematic side view in the state where the substitute scratch harrow was folded. FIG. 4 is a schematic plan view from a direction B in FIG. 3. FIG. 2 is a partial plan view of a substitute harrow according to the present invention. It is a side view in the state where the substitute scratch harrow was folded. It is a partial plan view of a substitute scratch harrow. It is a fragmentary top view of a folding mechanism. FIG. 4 is a partial plan view in a folded state.

Explanation of reference numerals

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 Rotation axis (rotation fulcrum)
7, 7a Transmission shaft 8 Transmission frame 9 Chain transmission case 10 Support frame 11 Rotary shaft 12 Crushing / scraping claw 13 Crushing / scraping rotor 14 Dog clutch 15 Shield cover 16 Apron 17 Leveler 18 Hinge 19 Guide plate 19a Guide groove Reference Signs List 20 rotation arm 20a guide pin 20b shaft 21 hydraulic cylinder 22 locking device 23 wheel stand T tractor tire

Claims (1)

At the rear of the tractor, a central part in the longitudinal direction of the agricultural work machine is attached via a three-point link hitch mechanism so as to be able to ascend and descend, and power is transmitted from the tractor to the central part of the agricultural work machine. In the agricultural work machine which can be folded to the center part side, the work machine part extending to the left and right sides from the part,
The agricultural working machine is divided into a central part and left and right working machine parts, and the left and right ends of the central part and the inner ends of the left and right working machine parts are connected to each other by a rotation fulcrum so as to be substantially 180 ° rotatable. At the same time, a guide pin is fixed to the left and right working machine parts, and the other end of the rotary arm provided with a guide groove in which the guide pin can be inserted and slidable is pivotally supported on the central part side, and The middle part is connected to the piston tip of a hydraulic cylinder whose base end is supported on the center part side, so that the left and right working machine parts can be folded and deployed by the expansion and contraction operation of the left and right hydraulic cylinders. Farming machine folding method.

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