JP3269985B2 - Driving method of folding agricultural work machine - Google Patents

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 driving method of a foldable agricultural working machine, each of which is foldable 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. 2. Description of the Related Art There is a well-known agricultural working machine in which a working machine portion extending to the left and right sides from the center portion can be folded toward the center portion in order to shorten the lateral length of the machine body.

[0003] As a method of driving the central portion and the left and right working machine portions, a chain transmission case is provided at one end on one side of the left and right working machine portions, and when the left and right working machine portions are brought into a working state, The lower working shaft driven by the chain transmission case drives all the working shafts of the central portion and the left and right working machine portions.

[0004]

In the case of the above-mentioned conventional agricultural working machine, the working shaft connecting portion provided with the clutch enters the soil, so that the durability is deteriorated. Also, since all the working parts are driven by one chain transmission case at the end of the working part,
There was a problem that it was difficult to balance strength.

According to the present invention, each of the three divided working parts is driven by a respective chain transmission case,
An object of the present invention is to provide a driving method of a folding agricultural work machine in which the durability of a connecting portion (folding portion) is improved and the working portion can be driven evenly.

[0006]

In order to achieve the above object, the present invention provides: 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. The working machine portion extending to the left and right sides from the portion can be folded toward the center portion side, and the farm working machine is divided into a center portion and left and right working machine portions into three parts. And the inner end of the left and right working machine parts are connected by a rotation fulcrum so that they can be rotated by approximately 180 °, and the center part and the left and right working machine parts can be folded so that they overlap each other. In addition, a chain transmission case is provided in each of the divided central portion and the left and right working machine portions to drive the working portion.

B. The length of the left and right working machine parts is made about half the length of the central part, and the chain transmission cases of the left and right working machine parts are provided at the outer ends, respectively.

[0008]

According to the above-mentioned means, the driving method of the folding agricultural working machine of the present invention does not allow soil to enter the drive connecting portions of the central portion and the left and right working machine portions, and the durability of the clutch and the like is improved. In addition, the strengths of the drive connection portions, the working shafts, and the like of the central portion and the left and right working machine portions are equalized, and the strength of each member can be reduced.

[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 fixedly mounted on the folding and rotating portion of the working machine portion 5L. 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.

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.

[0015]

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

The agricultural working machine is divided into a central part and left and right 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 rotating fulcrums. Connect the back of the central part and the back of the left and right working machine parts so that they can be folded, and provide a chain transmission case in each of the divided central part and left and right working machine parts to perform work. Since the parts are driven, no dirt gets into the drive connecting parts of the central part and the left and right working machine parts, and the durability of the clutch and the like can be improved. In addition, the strengths of the drive connection portions, the working shafts, and the like of the central portion and the left and right working machine portions are equalized, and the strength of each member can be reduced.

Since the lengths of the left and right working machine parts are almost halved with respect to the length of the central part, and the chain transmission cases of the left and right working machine parts are provided at the outer ends, respectively. The body balance when the work machine portion is folded over the central portion is improved, and the vehicle can run and move stably.

[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.

[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 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 T Tractor tire

Claims (2)

(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. Left and right ends of the central part and inner ends of left and right working machine parts
And each part can be rotated approximately 180 ° by a rotation fulcrum.
Connect the back of the central part and the back of the left and right working machine parts
Can be folded by overlapping
To, the divided central portion and right and left working machine driving method of folding agricultural machine is characterized in that so as to drive the working unit provided with a chain transmission case to each part. 2. The right and left working machines with respect to the length of the central portion.
2. The method for driving a folding agricultural working machine according to claim 1 , wherein the length of the portion is reduced to approximately one half, and the chain transmission cases of the left and right working machine portions are respectively provided at outer ends.