JPH10295113A - Locking method for folding farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously operate a locking device by mounting the center part of a longitudinal direction to the rear part of a tractor through a three- point link hitch mechanism in the state of being vertically movable to fold working machine parts extended to both right/left sides with respect to the center part respectively to the side of a center part. SOLUTION: The farm working machine is divided into the three parts of a center part 4 and left and right working machine parts 5L. The right/left tip parts of the part 4 and the inner tip parts of the right/left working machine parts 5L are connected in the state of being rotatable by nearly 180 deg. respectively from a rotation supporting point 6, a guiding board 19a with the guiding groove 19a is fixed to the parts 5L, the other tip of a rotating arm 22f provided with a guide pin 20a for fit-inserting to the groove 19a at its one tip part is pivoted to the side of the part 4, and the piston tip of a hydraulic cylinder 21 whose base tip is supported to the side of the part 4 is connected to the intermediate part of the arm 22f to fold and develop the parts 5L by the extending and contracting operation of the cylinder 21 and to operate the locking device 22 by the extending and contracting operation of the cylinder 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine portion having a longitudinal central portion 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 extending to the left and right sides with respect to the central portion. And a lock method of the agricultural work machine, which can be folded toward a central portion.

[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. With respect to the central portion, the working machine portion extending to the left and right sides from the central portion can be folded toward the central portion side in order to reduce the length of the body in the lateral direction, and the working machine portion is brought into a working state. 2. Description of the Related Art Agricultural working machines are known in which a locking device locks a central portion when deployed.

[0003] The operation of the lock device is performed by operating a separately provided cylinder device in conjunction with a hydraulic cylinder for folding and unfolding the left and right working machine portions when the left and right working machine portions are folded and unfolded. Alternatively, the locking device is operated manually or by a dedicated cylinder device.

[0004]

In the above-mentioned conventional lock device, when a separately provided cylinder device is operated in conjunction with a hydraulic cylinder that folds and expands left and right working machine parts, the number of parts is reduced. Increases the cost. Further, when the lock device is operated manually or by a dedicated cylinder device, the user sometimes forgets to release the lock / lock. There was a problem.

[0005] The present invention folds the left and right working machine parts.
By operating the lock device by operating the hydraulic cylinder to deploy and release the lock, and also to lock,
The purpose of the present invention is to solve the above conventional problems.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an A.I. At the rear of the tractor, the central part in the longitudinal direction of the agricultural working machine is mounted 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. A working machine portion extending to the left and right sides from the portion, each of which is foldable toward a central portion side, wherein the working machine portion is locked by a lock device when the working machine portion is deployed in a working state; 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 able to rotate substantially 180 °. A guide plate having a guide groove is fixedly mounted on the work machine portion, and the other end of a rotary arm provided with a guide pin to be inserted into the guide groove at one end is pivotally supported on the central portion side. The middle part of the hydraulic cylinder is connected to the piston tip of a hydraulic cylinder whose base end is supported on the center part side, so that the right and left working machine parts can be folded and unfolded by the expansion and contraction operation of the hydraulic cylinder, and the hydraulic cylinder can be expanded and contracted. The locking device is operated by an operation.

B. In the guide groove of the guide plate, a portion for operating the lock device and a portion for folding and unfolding the left and right working machine portions are provided, and the locking device is operated independently of the operation of folding and unfolding the left and right working machine portions. It is characterized by being operated.

[0008]

According to the above-mentioned means, in the method for locking a folding agricultural working machine of the present invention, when the left and right working machine parts are folded and unfolded by the expansion and contraction operation of the hydraulic cylinder, the locking device is always operated by the expansion and contraction operation of the hydraulic cylinder. The lock is released when the left and right working machine parts are unfolded from the folded state, and when the left and right working machine parts are folded from the unfolded working state, the lock is performed when the folding is completed.

[0009]

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 the apron 3 is covered with a shield cover 15 supported by the main body frame, and a rear end of the shield cover 15 has an apron 1 pivotally supporting a leveler 17 at a rear end position.
The upper end of 6 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 fixed to the folding and rotating portion of the working machine portion 5L, and a guide pin 20a 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.

The lock device 22 will be described with reference to the principle diagram of FIG. The locking hook 22a provided on the working machine portion 5L side is adapted to engage / disengage with the lock pin 22b provided on the central portion 4 side, and is provided with a connecting arm 22c integral with the locking hook 22a. The base is pivotally supported by a pivot shaft 22d, and a torsion spring (not shown) is wound around the pivot shaft 22d.
2a biases in a direction away from the lock pin 22b. On the other hand, the base end of the turning arm 22f is pivotally mounted so as to cross the guide groove 19a.
The tip of 2f and the tip of the connection arm 22c are connected by a link arm 22e whose length can be adjusted.

In this state, when the hydraulic cylinder 21 is contracted to unfold the working machine portion 5L from the folded state, the lock arm 22 causes the rotating arm 20 to rotate the shaft 20.
The guide pin 20a rotates by a radius R around the center b in the guide groove 19a and moves by B in the guide groove 19a.
, The lock pin 22b is engaged with the lock hook 22a, and the lock state is changed to the lock release state by the torsion spring. Thereafter, the hydraulic cylinder 21 further contracts, the guide pin 20a moves by A, and the work machine portion 5L is rotated by 180 ° and folded. When the hydraulic cylinder 21 is extended and the working machine portion 5L is folded from the deployed working state, the guide pin 20a moves by B when the folding is completed, and the guide pin 20a presses the rotating arm 22f. By rotating, the lock hook 22a is engaged with the lock pin 22b to be in a locked state.

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. A residual tillage treatment device is provided below each of the chain transmission cases 9.

[0017]

As described above, according to the method for locking a folding agricultural machine of the present invention, the following effects are obtained by the above means.

[0018] 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 substantially 180 degrees by a rotation fulcrum.
° rotatably connected, a guide plate having a guide groove is fixed to the left and right working machine parts, and the other end of the rotating arm provided with a guide pin at one end fitted in the guide groove is connected to the center part. The left and right working machine parts can be folded and unfolded by the expansion and contraction operation of the hydraulic cylinder by connecting the piston tip of the hydraulic cylinder whose base end is supported on the center part side to the intermediate part of the rotating arm In addition, since the locking device is operated by the expansion and contraction operation of the hydraulic cylinder, when the left and right working machine parts are folded and unfolded by the expansion and contraction operation of the hydraulic cylinder, the lock device must be operated to lock and unlock. be able to. Therefore, when folding and unfolding the left and right working machine parts, there is no need to forget to lock and unlock.

[0019] In the guide groove of the guide plate, a part for operating the lock device and a part for folding and unfolding the left and right working machine parts are provided, and the left and right working machine parts are folded and unfolded.
Since the locking device is operated regardless of the operation of deployment, two operations can be performed by the expansion and contraction operation of one hydraulic cylinder, and the configuration can be simplified and provided at low cost. In addition, there is no need to separately operate the lock device, and the folding and unfolding operations of the left and right working machine parts are reliably performed.
It can be performed efficiently.

[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 diagram illustrating the operation principle of the lock device.

FIG. 10 is a partial plan view in a folded state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Scraper harrow 2 Connection part to tractor 3 Speed change gearbox 3a Input shaft 4 Central part of clasp harrow 4a Back of central part 5L Left working machine part 5R Right working machine part 5La Left working machine part back 5Ra Right working machine Back surface of part 6 Rotating shaft (rotation fulcrum) 7, 7a Transmission shaft 8 Transmission frame 9 Chain transmission case 10 Support 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 22a locking hook 22b
Lock pin 22c Connecting arm 22d Pivot shaft with torsion spring 22e Link arm 22f Rotating arm 2
3 Wheel stand T Tractor tire

Claims (2)

[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 foldable toward the center portion side, and is locked by a lock device when the working machine portion is deployed in a working state. In the above, the agricultural working machine is divided into a central part and right and left working machine parts into three parts, and the left and right ends of the central part and the inner ends of the left and right working machine parts can be rotated by approximately 180 ° by a rotation fulcrum, respectively. A guide plate having a guide groove is fixedly connected to the left and right working machine parts, and a guide pin to be inserted into the guide groove is provided at one end. I The middle part of the rotary arm is connected to the piston tip of a hydraulic cylinder whose base end is supported on the center part side, so that the right and left working machine parts can be folded and unfolded by the expansion and contraction operation of the hydraulic cylinder. A method for locking a folding farm working machine, wherein the locking device is operated by an expansion and contraction operation of a hydraulic cylinder. 2. The method according to claim 1, further comprising: providing, in the guide groove of the guide plate, a portion for operating the locking device and a portion for folding and unfolding the left and right working machine portions, and relating to the operation of folding and unfolding the left and right working machine portions. 2. The method according to claim 1, wherein the lock device is operated without the lock.