JP3269986B2 - Arrangement structure of chain transmission case in 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 an arrangement position of a chain transmission case which is mounted on a rear part of a tractor via a three-point link hitch mechanism so as to be able to ascend and descend in a longitudinal direction, and which is disposed in the central part. And an improved arrangement structure.

[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 known a so-called center drive type agricultural working machine in which power transmitted from an upper portion of a central portion of the machine is directly transmitted to a lower working portion via a chain transmission case.

[0003]

In the case of the above-mentioned conventional agricultural working machine, it is necessary to carry out the residual cultivation processing under the chain transmission case and the processing of the portion which is depressed by the wheels of the tractor. There was a problem that it would be up.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an arrangement structure of a chain transmission case in an agricultural work machine which simultaneously performs a residual cultivation process under a chain transmission case and a process of tractor wheel marks.

[0005]

In order to achieve the above object, the present invention provides: The agricultural work machine according to claim 1, wherein a longitudinal center portion of the farm work machine is mounted on a rear portion 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 center portion of the farm work 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. The back of the part and the back of the left and right working machine parts are overlapped so as to be foldable, and the power transmitted to the upper part of the farm working machine is transmitted to the working part provided below the farm working machine. A chain transmission case for transmission is arranged behind wheels of the tractor.

B. The length of the left and right working machine parts is made about half the length of the central part, and the left and right working machine parts are foldable with respect to the central part. It is characterized by being provided in.

[0007]

The arrangement of the chain transmission case in the agricultural working machine according to the present invention by the above-described configuration allows the tractor wheel traces to be simultaneously processed by performing the remaining tillage treatment below the chain transmission case. Further, the configuration is simplified, and the cost can be reduced. Furthermore, it is also effective for a foldable agricultural work machine.

[0008]

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 scratching 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 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, 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.

[0014]

As described above, according to the arrangement structure of the chain transmission case in the agricultural working machine of the present invention, the following effects can be obtained by the above-described configuration steps.

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 about 180 ° about a rotation fulcrum, respectively. The power transmission transmitted to the upper part of the agricultural working machine is performed by connecting the rear surface of the central part and the rear surfaces of the left and right working machine parts so as to be foldable. Since the chain transmission case for transmitting power to the section is disposed behind the wheel of the tractor, the tractor wheel trace can be simultaneously processed by performing the residual cultivation process below the chain transmission case. Further, the configuration can be simplified, and the cost can be reduced.

The length of the left and right working machine parts is about half the length of the central part, and the left and right working machine parts are foldable with respect to the central part. Since it is provided in the central portion, it can be effectively operated even in a foldable agricultural work machine.

[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 farm working machine having a longitudinally 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 transmitting power from the tractor to a central portion of the farm working machine. , The above-mentioned agricultural work machine is divided into a central part and left and right work equipment parts
And the left and right ends of the central portion and the inner ends of the left and right working machine portions.
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, farm work, characterized in that the power transmitted to the upper part of the agricultural machine, the chain transmission case for power transmission to the working unit provided below the agricultural machine, is disposed on the wheel behind the tractor Arrangement structure of the chain transmission case in the machine. 2. The right and left working machines with respect to the length of the central portion.
2. The device according to claim 1, wherein the length of the portion is reduced to approximately half, the left and right working machine portions are foldable with respect to the central portion, and the chain transmission case is provided in the central portion. The arrangement structure of the chain transmission case in the described agricultural work machine.