JPH06217605A - Device for driving rotary cover - Google Patents

Abstract

PURPOSE:To smoothly move an upper cover back and forth by connecting an end of a rack meshing with a pinion rotated by an operating handle rotatably around a transverse shaft to the upper cover. CONSTITUTION:An upper cover 3 is supported movably back and forth in the peripheral direction of a tillage part 2 relatively to a rotary machine casing 5 and an operating handle 7 is arranged in the lateral part of a top mast 6 in nearly the center in the right and left directions of the rotary machine casing. A pinion 8 rotated by the operating handle is supported by the top mast and an end of a rack 9 meshing with the pinion is connected rotatably around a transverse shaft to the upper cover. The rack is connected to nearly the center in the right and left directions of the upper cover. Thereby, a great twisting force is not applied to the upper cover.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cover driving device in which an upper cover can be moved back and forth.

[0002]

2. Description of the Related Art Conventionally, in a cover device for a rotary cultivator, a rear cover that covers the rear of the cultivating part and has a leveling action is provided at the rear end of an upper cover that is arcuate in side view and covers the upper part of the cultivating part. It supports the upper cover and the rear cover so that they can be moved to the proper height according to the working depth during cultivating or slaughtering work, so that the upper cover can be moved forward and backward in the circumferential direction of the cultivating part. is doing.

In this prior art, a telescopic rod means is provided between the rotary machine frame and the upper cover, and by rotating one of the rods, the distance from the other rod is expanded and contracted to form a rotary machine frame. On the other hand, the upper cover is moved back and forth in the arc direction, and the position of the upper end of the rear cover is moved up and down. By the way, normally, a top mast is fixed on the gear case in the center of the rotary machine frame, and height adjusting means for adjusting the height of the rear gauge wheel from the top mast to the rear is provided to drive the upper cover. The telescopic rod means has a structure that it is difficult to dispose not only in the center of the rotary machine frame but also in the vicinity of the side surface of the top mast. Therefore, in the above-mentioned prior art, the distance at which the handle attached to one rod can be rotated. Only, the telescopic rod means are arranged away from the top mast.

[0004]

Therefore, the telescopic rod means may be largely separated from the center of the upper cover in the left-right direction, and a twisting force may be applied to the upper cover, which makes it difficult to smoothly move back and forth. . According to the present invention, a rack in which an upper cover is connected to move back and forth is made movable by a pinion, the pinion is supported on a top mast, and an operation handle for rotating the pinion is arranged close to a side surface of the top mast. Thus, it is an object of the present invention to provide a rotary cover drive device capable of always moving the upper cover back and forth smoothly.

[0005]

A concrete means for solving the problem in the present invention is to pivot a rear cover 4 covering the rear of the tiller 2 at the rear end of an upper cover 3 covering the upper part of the tiller 2. , A rotary cover in which an upper cover 3 is movably supported in the circumferential direction of the tilling section 2 with respect to the rotary machine frame 5, and is operated on a side portion of the top mast 6 located substantially in the center in the horizontal direction of the rotary machine frame 5. The handle 7 is arranged, and the pinion 8 rotated by the operation handle 7 is attached to the top mast 6
The end portion of the rack 9 which is supported by the upper cover 3 and is engaged with the pinion 8 is connected to the upper cover 3 so as to be rotatable around the horizontal axis.

[0006]

When the height of the rotary cultivator 13 is changed with respect to the tractor 14 via the three-point link mechanism 15 to adjust the working depth, when the pinion 8 is rotated via the operation handle 7, The engaged rack 9 moves in the axial direction to move the upper cover 3 back and forth to adjust the posture of the upper cover 3 and the height of the rear cover 4.

Since the pinion 8 is supported by the top mast 6, the rack 9 is arranged close to the top mast 6,
The connecting portion with the upper cover 3 is close to the center of the upper cover 3 in the left-right direction, and the upper cover 3 is moved back and forth without being twisted.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 13 is a rotary cultivator, which is mounted behind the tractor 14 via a three-point link mechanism 15. A top link 16 is provided at the rear of the three-point link mechanism 15.
And a connecting device 18 connected to the rear end of the lower link 17
Is provided, and the rotary cultivator 13 is automatically connected through the connecting device 18.

1 to 4, a rotary cultivator 13 has a rotary machine frame 5 provided with a cover device 1 for covering the cultivating part 2. The rotary machine frame 5 projects a support arm 22 left and right from a gear case 21 located substantially in the center in the left-right direction (width direction), a transmission case 23 is attached to the left support arm 22, and a side frame 24 is attached to the right support arm 22, respectively. The top mast 6 is fixed to the upper part of the bolt 21 by bolts.

The transmission case 23 and the side frame 24
Claw shaft 30 having a large number of tilling claws 29 between the lower ends of and
Are rotatably supported around a horizontal axis and form a tilling section 2. The power for driving the pawl shaft 30 is the tractor 1
4 from the PTO shaft 31 through the universal joint shaft 32 to the input shaft 3
3 is transmitted to the pawl shaft 30 from the input shaft 33 via the gear transmission means in the gear case 21 and the chain transmission means in the transmission case 23.

Reference numeral 34 denotes a support frame pivotally connected to the support arm 22. Rear gauge wheels 35 are attached to the left and right sides of the rear end of the support frame 22, and a rear gauge wheel 35 is provided between the top mast 6 and the support frame 34. A height adjusting means 36 in the form of a telescopic rod is provided for adjusting the height of the platter to adjust the working depth. The cover device 1 for covering the cultivating part 2 is roughly classified into an upper cover 3 for covering the upper part of the cultivating part 2, a rear cover 4 for covering the rear part,
A support cover 40 for supporting the left and right side portions of the upper cover 3,
The rear fixed cover 41 and the rear movable cover 3 that cover the rear side
9 and an auxiliary cover 42 capable of covering the upper front.

The upper cover 3 has side plates 45 fixed to the left and right ends of a main plate 46, which is substantially arcuate in side view along the outer periphery of the tillage part 2, and a front reinforcing member 47 is provided at the front part of the upper surface of the main plate 46 and a rear part is provided at the rear part. Reinforcements 48 are each attached over their entire width. A support cover 40 is rotatably supported on the lower ends of the transmission case 23 and the side frame 24 via a bush coaxially with the pawl shaft 30, and the support cover 40 supports the left and right side plates 45 and the rear side plate 45. The side fixing cover 41 is fixed by bolts. The rear fixed cover 41 on the transmission case 23 side is bulged outward so that the soil discharged from the tiller 2 can be supplied to the rear of the transmission case 23.

An upper end of the rear cover 4 is pivotally connected to a rear end of the upper cover 3 via a pivot shaft 50. Between the upper cover 3 and the rear cover 4, the upper cover 3 and the upper cover 3 are connected. A lowering means 51 is provided for lowering the rear cover 4 downward so as to apply a uniform pressure. The rear cover 4 and the upper cover 3 have elastic covers 52, 53 formed of rubber sheets or the like with a gap on the surface on the side of the tilling part 2 respectively.
Is stretched. The elastic covers 52 and 53 may be integrally formed.

The upper cover 3 has a main plate 46 which is a main part of the upper cover 3 when the support cover 40 rotates about the claw shaft 30.
Moves in an arc in the circumferential direction of the tilling part 2, and its rear end, that is, the upper end of the rear cover 4 is vertically displaced.
A drive mechanism 56 for moving the upper cover 3 back and forth is provided between the upper cover 3 and the rotary machine frame 5. The drive mechanism 56 has an operation handle 7, a pinion 8 and a rack 9, and is arranged near the side portion of the top mast 6. 5
Reference numeral 7 denotes a pivot body, the shaft portion 57A of which is rotatably supported by the top mast 6 so as to be rotatable around a horizontal axis, and the pinion 8 is arranged in a block portion 57B fixed to the end portion of the shaft portion 57A. 9 is inserted.

The pinion 8 has a shaft portion 8A arranged in parallel with the shaft portion 57A, an operation handle 7 fixed to the outer end thereof, and a rack 9 having rack teeth formed with rack teeth, and a block portion. It meshes with the pinion 8 in 57B.
The operation handle 7 has a grip shaft 58 on which a grip body 59 is rotatable and axially movable, and a rotation restricting means 61 for preventing unintentional rotation.

The rotation restricting means 58 has a lever 62 whose middle portion is pivotally supported by the operation handle 7, a lock pin 64 connected to one end of the lever 62 via a pin 63, and the lock pin 64. It has a concave portion 65 formed in the block portion 57B so as to be fitted, and a spring 66 for urging the other end of the lever 62 fitted to the grip shaft 58 toward the grip body 59 side.

The lock pin 64 penetrates the operation handle 7 and can freely move back and forth to the block portion 57B side, and the spring 6
By being pressed by 6 and protruding, it engages with the concave portion 65,
By moving the grip body 59 on the grip shaft 58 against the spring 66, the lever 62 rotates and the lock pin 6 moves.
4 can be detached from the recess 65, and the lock pin 6
By removing 4, the rotation restriction of the operation handle 7 is released,
The pinion 8 can be rotated by the operation handle 7.

The operating handle 7 is a rotary tiller 13
It is possible to operate it from above the tractor 14 by lifting it with the three-point link mechanism 15, and it is possible to easily operate and release the lock only by moving the grip body 59, and to securely lock the lock pin 64. 1 and 2,
Reference numeral 68 denotes a power take-off shaft projecting rearward from the gear case 21, and power can be transmitted from the input shaft 33 via a clutch, and a car wash pump 69 and the like can be driven.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the rotary cultivator 13 uses the power take-off shaft 68 and the car wash pump 69.
When the structure is not provided, the pinion 8 and the rack 9 may be arranged in the center of the top mast 6, and only the operation handle 7 may be arranged on the side portion of the top mast 6. Figure 4
6 to 6 show a first example of the rear gauge wheel holding mechanism.

A mounting frame 7 is provided at the rear end of the support frame 34.
0 is connected so that the front and rear positions can be adjusted, and this mounting frame 70
A tool bar 71 made of a square tube to which a pottery can be attached is provided at the rear part, and a square shaft part 72A of a mounting shaft 72 is inserted and fixed at both ends of this toolbar 71, and a round shaft part 72B of the mounting shaft 72 is attached. The support cylinder portion 73B of the holder 73 is rotatably fitted, and the column 35A of the rear gauge wheel 35 is inserted into the vertical cylinder portion 73A of the holder 73 in a height-adjustable manner and fixed by a pin 74.

On the round shaft portion 72B of the mounting shaft 72,
Two upper and lower recesses 75 and a peripheral groove 72C are formed, and the tip of a bolt 79 screwed into the supporting cylinder portion 73B is engaged with the peripheral groove 72C. A tubular cam member 76 is fixed to the support tubular portion 73B of the holder 73, and the cam member 76 has an inclined cam surface 76A around the hole. Reference numeral 77 is a lock lever formed by bending spring steel into a substantially V shape. One end of the lock lever 77 is fixed at a right angle to a lock pin 78 inserted into a hole of the cam member 76, and the other end is a lock pin 78. Concentricly, it is rotatably supported by the support cylinder portion 73B.

The lock pin 78 penetrates the support cylinder portion 73B from the cam member 76, and the recess 75 on the lower side of the round shaft portion 72B.
The lock pin 78 can be disengaged from the recess 75 by rotating the lock lever 77 to widen the gap between both ends of the cam surface 76A. In this state, the holder 73 is turned upside down. Then, the lock pin 78 can be engaged with the upper recess 75.

As a result, it is possible to easily change the work posture in which the rear gauge wheel 35 is in contact with the ground and the retracted posture in which the rear gauge wheel 35 is inverted upward,
Moreover, it is possible to surely hold in the changed posture.
The pair of concave portions 65 may be formed at the same height before and after the round shaft portion 72B. The rear gauge wheel 35 is held by a holding body 80 with a caster angle, and the holding body 80
The holding shaft 81 fixed thereto is rotatably supported by the column 35A, and is biased by the coil spring 82 so as to move the rear gauge wheel 35 inward (center side in the width direction of the rotary cultivator). Then, the rear gauge wheel 35 moves inward so that the rear gauge wheel 35 does not sway out of the width of the rotary cultivator 13 and come out.

FIG. 7 shows a second example of the rear gauge wheel holding mechanism. A lock lever 86 is pivotally supported by a supporting cylinder portion 73B of a holder 73 via a bracket 85, and the tip end of the lock lever 86 is supported. The lock pin 78 is connected via a pin, and the lock pin 78 penetrates the support cylinder portion 73B and is detachably coupled to the recess 75 on the lower side of the round shaft portion 72B.

By rotating the lock lever 86 against the spring 87, the lock pin 78 is moved to the lower concave portion 7.
If the rear gauge wheel 35 is turned upside down in this state, the lock pin 78 can be engaged with the upper recess 75. The rear gauge wheel holding mechanism in each of the above-mentioned examples can be operated only by operating the lock levers 77 and 86.
Can be turned upside down, and the posture of the rear gauge wheel 35 can be changed extremely lightly and easily.

[0026]

According to the present invention described in detail above, the operation handle 7 is arranged on the side portion of the top mast 6 located substantially in the center of the rotary machine frame 5 in the left-right direction, and is rotated by the operation handle 7. Since the pinion 8 is supported by the top mast 6 and the end of the rack 9 meshing with the pinion 8 is rotatably connected to the upper cover 3 about the horizontal axis, the rack 9 is substantially centered in the left-right direction of the upper cover 3. Can be connected as close as possible to
The upper cover 3 can always be smoothly moved back and forth without giving a large twisting force.

[Brief description of drawings]

FIG. 1 is a rear view showing an embodiment of the present invention.

FIG. 2 is a side view of the same section.

FIG. 3 is a cross-sectional rear view of the main part.

FIG. 4 is a side view of the same.

FIG. 5 is a sectional rear view showing a first example of the rear gauge wheel holding mechanism.

6 is a cross-sectional view taken along line XX of FIG.

FIG. 7 is a sectional rear view showing a second example of the rear gauge wheel holding mechanism.

[Explanation of symbols]

 1 Cover Device 2 Tillage Section 3 Top Cover 4 Rear Cover 5 Rotary Machine Frame 6 Top Mast 7 Operating Handle 8 Pinion 9 Rack 13 Rotary Tiller 14 Tractor 56 Drive Mechanism 57 Pivot Body

Claims (1)

[Claims] 1. A rear cover (4) for covering the rear of the tiller (2) is pivotally supported at the rear end of an upper cover (3) for covering the upper part of the tiller (2), and the rear cover (4) for the rotary machine frame (5). And a top cover (3) movably supported in the circumferential direction of the tilling part (2), the side cover of the top mast (6) located substantially in the center of the rotary machine frame (5) in the left-right direction. The operation handle (7) is arranged, the pinion (8) rotated by the operation handle (7) is supported on the top mast (6), and the end of the rack (9) meshing with the pinion (8) is fixed. A drive device for a rotary cover, which is connected to an upper cover (3) so as to be rotatable about a horizontal axis.