JP3510765B2 - Folding farm work machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to fold the working machine parts on both the left and right sides of the central part toward the central part,
The present invention relates to a folding agricultural work machine in which a stand is detachably provided on both sides of a central part in a state where the left and right work machine parts are folded.

[0002]

2. Description of the Related Art Conventionally, a longitudinal center portion of a farm work machine is mounted on a rear portion of a tractor via a three-point link hitch mechanism so as to be vertically movable, and power is transmitted from the tractor to the center portion of the farm work machine. BACKGROUND ART There is a well-known agricultural working machine in which working machine parts extending from the central part to the left and right sides of the central part can be folded toward the central part. In order to mount a stand with wheels (casters) on the agricultural working machine, a stand mounting portion is provided in front of the frame so that the stand can be mounted and dismounted even though the center of gravity of the machine is at the rear. In addition, there is also one in which a total of four stands are provided on the front, rear, left and right of the agricultural work machine.

[0003]

In the above-mentioned conventional stand for agricultural working machine, in the former case, the front-rear length of the stand becomes long and large, and the weight becomes heavy. Further, in the latter case, there is a problem that four stands are required and the attaching and detaching operation is troublesome.

The present invention provides a folding agricultural working machine in which the weight of the stand can be reduced, the stand can be easily attached and detached, and the stand member is prevented from rotating in the front-rear direction to increase the strength. With the goal.

[0005]

In order to achieve the above object, the present invention provides: The central portion 4 in the length direction of the agricultural work machine 1 is mounted on the rear part of the tractor T via a three-point link hitch mechanism so as to be able to move up and down,
While transmitting power to the central portion 4 of the agricultural machine from the tractor T, with respect to the central portion 4, the working machine part 5 which extends to the left and right sides from the central portion 4, foldable on each central portion 4 side in agricultural machine 1 and, working machine parts 5L, 5 of the left and right of the agricultural machine 1 and the central portion 4
R is divided into three parts, and the left and right end portions of the central portion 4 and the inner end portions of the left and right working machine portions 5L and 5R are connected by a rotation fulcrum 6 so as to be rotatable by approximately 180 ° .
The back surface 4a and the back surfaces 5La and 5Ra of the left and right working machine parts
Foldable by stacking them, and with the left and right work machine parts 5L and 5R folded, the wheeled stands 23 are detachably arranged at the left and right ends of the central frame 24 of the central part 4 . It is characterized by that.

B. In the wheeled stand 23 , the connecting portions 23a are fitted and inserted at both ends of a pipe-shaped central portion frame 24 which penetrates the central portion 4 in the left-right length direction, and the engaging pin 25 is inserted and locked. together, stand with the wheel 2
It is characterized in that a backing plate 26 for restricting the front-rear direction rotation of 3 is projected laterally from both left and right end portions of the central portion 4 .

[0007]

The folding agricultural working machine of the present invention having the above structure
Can reduce the weight of the wheeled stand 23, and can be easily attached to and detached from the central portion 4 of the agricultural work machine. Further, the rotation of the wheeled stand 23 in the front-rear direction causes the contact plate 26 to rotate.
Will be blocked by and the strength will be increased.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. In the figure, reference numeral 1 is long in the left-right direction (3770 m in this embodiment).
m) It is a surrogate harrow that has the function of crushed soil and scrape. Although not shown, the front portion of the substitute harrow 1 is provided with a connecting portion 2 to the tractor, which 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 part of the tractor so as to be able to move up and down. Further, from the PTO shaft of the tractor, through the universal joint, the transmission shaft, etc., to the transmission gear box 3 provided in the central portion on the front side of the scraping harrow 1, the input shaft 3
Power is transmitted via a.

The substitute harrow 1 has a central portion 4 (length = 19.
00mm) and the left and right work machine parts 5L, 5R (length = 9 for each)
30 mm), and the left and right end portions of the central portion 4 and the inner end portions of the left and right working machine portions 5L and 5R are connected by rotary shafts (rotation fulcrums) 6 and 6 so that they can be rotated by approximately 180 °. , The rear surface 4a of the central portion 4 and the left and right working machine portions 5
The back surfaces 5La and 5Ra of the L and 5R can be folded so as to overlap each other. As shown in the drawing, the lengths of the left and right working machine portions 5L and 5R are approximately half the length of the central portion 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.

On the left and right sides of the gear box 3, transmission frames 8 and 8a, which also serve as a main body frame and are internally provided with transmission shafts 7 and 7a, are provided. From the transmission frames 8 and 8a, the central portion 4 is located behind the tire T of the tractor, and the working machine portions 5L and 5R are located at the outer ends, respectively, and the chain transmission case 9 is provided.
Is installed vertically. A rotary shaft 11 is mounted between the lower end of each of the chain transmission cases 9 and the lower end of a support frame 10 that extends vertically from the transmission frames 8 and 8a so as to face the chain transmission case 9. A large number of crushed soil / scraping claws 12 are attached to the circumference of the rotary shaft 11 so
Data 13 is configured.

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 entire scraping harrow 1 shown in FIG. 2 is in a working state, and when the left and right working machine parts 5L and 5R are rotated around the rotation shaft 6 and folded on the central part 4, the dog clutch 14 is rotated. Is disconnected. Crushed soil / Substitute rotor 1
The upper part of 3 is covered with a shield cover 15 supported by the main body frame. At the rear end of the shield cover 15, an upper end of an apron 16 having a leveler (flat plate) 17 pivotally supported at the rear end is provided. It is pivotally attached in a vertically rotatable manner. The folding facing portions of the leveler 17 are connected by a hinge 18 that rotates about an axis substantially equal to the axis of the rotary shaft 6. Further, the leveler 17 can be displaced between a leveling position for leveling the soil and a leveling position for scraping the soil.

A guide plate 19 having a guide groove 19a is fixedly mounted on the folding and rotating portion of the working machine portion 5L, and a guide pin 20a which is fitted into the guide groove 19a at one end is provided on the upper side of the guide plate 19. Has a central part 4 with the other end
A rotary arm 20 which is rotatably supported in the left-right direction by a shaft 20b and bent in a dogleg shape is provided on the side of the hydraulic cylinder 2 between the intermediate portion of the rotary arm 20 and the transmission frame 8.
1, and the working machine portion 5L is rotated between the working position and the folding 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 locking device 22.

When the left and right working machine parts 5L and 5R are folded on the central part 4, the stands 2 with wheels (casters) are provided at the positions of the support frames 10 at the left and right ends of the central part 4.
3 is detachably provided. Further, on the front side of the lower portion of each of the chain transmission cases 9, there is provided a residual tillage (edge) treatment device.

The stand 23 with wheels (casters) is
The connecting portions 23a protruding laterally from the upper portion of the stand member are fitted into the opening portions at both ends of the pipe-shaped central portion frame 24 that penetrates the central portion 4 in the left-right length direction, and the central portion frame 24 is pierced. From the established pin hole 24a to the connecting portion 23a
The locking pin 25 is inserted into the pin hole formed in the hole for locking. The rotation of this stand member in the front-back direction is
It is designed to be regulated by a backing plate 26 protruding laterally from the support frame 10.

[0015]

As described above , according to the folding agricultural working machine of the present invention, the following effects can be obtained.

.. Working machine portion 5L of the left and right of the agricultural machine 1 and the central portion 4, and 3 divided into a 5R, said left and right end and the left and right working machine parts 5L of the central portion 4, rotating respectively the inner end of the 5R fulcrum 6 above about 180 ° rotatably connected to the
The rear surface 4a of the central portion 4 and the rear surfaces 5L of the left and right working machine portions
Can be folded by overlapping a and 5Ra
And, the left and right working machine portion 5L, in a folded state 5R, since detachably attached to wheeled stand 23 on the left and right side end portions of the central portion the frame 24 of the central portion 4, the car
Even if the weight of the wheeled stand 23 is reduced, the farm work machine 1 can be sufficiently supported, and can be easily attached to and detached from the central portion 4 .

.. The wheeled stand 23 is the above-mentioned central portion.
Pipe-shaped central frame that penetrates 4 in the left-right length direction
The connecting portion 23a is fitted and inserted into both ends of the locking pin 2
5 with locking by inserting the said central portion 4 of the backing plate 26 for regulating the longitudinal direction of the rotation of the wheel with stand 23
Since projecting laterally from the left and right side end portions, static wheeled
The load in the front-rear rotation direction of the band 23 is received by the contact plate 26 in a wide range, and the front-rear rotation of the wheeled stand 23 is reliably prevented, so that the strength of the stand 23 can be increased.

[Brief description of drawings]

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

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

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

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

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 of a folded state.

FIG. 10 is a plan view showing an arrangement of a stand with wheels.

FIG. 11 is a perspective view showing how to attach and detach the wheeled stand to and from the central portion.

[Explanation of symbols]

1 generation scraping harrow 2 connection part to tractor 3 speed change gear box 3a input shaft 4 central part of generation scraping harrow 4a rear surface of central part 5L left working machine part 5R right working machine part 5La rear working machine part 5Ra right working machine Rear surface 6 Rotation 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 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 Wheel (Caster) Stand 23a Connecting Port 24 Pipe-shaped Central Frame 24a Pin Hole 25 Locking Pin 26 Abutment Plate T tractor tire

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01B 59/042 A01B 33/16 A01B 73/06 B60S 9/02

Claims (2)

(57) [Claims] 1. A longitudinal center portion (4) of an agricultural work machine (1) is mounted on a rear portion of a tractor (T) through a three-point link hitch mechanism so as to be capable of moving up and down. Power is transmitted to the central portion (4), and working machine portions (5) extending from the central portion (4) to the left and right sides of the central portion (4) are respectively attached to the central portion (4) side. In the foldable agricultural working machine (1), the agricultural working machine (1) is divided into a central part (4) and left and right working machine parts (5L, 5R) into three parts. The end portion and the inner end portions of the left and right work machine portions (5L, 5R) are rotatably connected to each other by a rotation fulcrum (6) so that they can be rotated by approximately 180 °. Foldable by overlapping the back of the machine part (5La, 5Ra) With the left and right working machine parts (5L, 5R) folded, the wheeled stands (23) are detachably arranged at the left and right ends of the central frame (24) of the central part (4). Folding farm work machine characterized by being installed . 2. The wheeled stand (23) has a connecting portion (23a) inserted into both ends of a pipe-shaped central portion frame (24) which penetrates the central portion (4) in the left-right length direction. And insert the locking pin (25) to lock it.
2. The contact plate (26) for restricting the rotation of the wheeled stand (23) in the front-rear direction is laterally projected from both left and right end portions of the central portion (4). Folding farm work machine.