JP3035441B2 - Rotary cover operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cover operating device for a rear cover forming a rotary cover for covering a cultivated portion of a tractor so that the rear cover can be easily operated from a driver's seat.

[0002]

2. Description of the Related Art Conventionally, a rotary cover of a tractor is slidably provided so as to cover a rear cover behind a main cover that covers an upper part of a tilling part and to adjust a height thereof.
It is known that the operation of moving the rear cover forward and backward is performed by operating an electric cylinder installed between the rear cover and the main cover.

[0003]

However, in the operation by the above-mentioned conventional electric cylinder, the rear cover is moved forward and backward by operating a switch. If it is operated in spite of being difficult to move, the rail member and the cover are deformed and may be damaged in some cases because they are forcibly operated by the strong force of the cylinder.

Further, since the electric cylinder is connected to the body of the tractor by a harness, the harness is easily damaged or broken in a tilling apparatus having much vibration, and the weight of the body is large. There is a problem that the balance is deteriorated and the cost is increased. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide an inexpensive rotary turning cover operating device which can reduce the weight with a simple mechanism and has good operability.

[0005]

According to the present invention, there is provided a rotary cover operating device for a rotary cover according to the present invention, in which a tilling device having a rear cover provided at a rear portion of a main cover for covering a tilling portion is provided at a rear portion of a driver's seat. In a tractor tilling device provided to be able to ascend and descend, a main link and a rear cover are connected from above with a bent link composed of an arm that operates respectively, and an operation lever provided on the operation arm is extended toward the vicinity of a driver's seat. The intermediate portion is adjustably locked to a plurality of locking portions formed in a guide hole of a lever guide provided above the main cover in a direction in which the rear cover contacts the main cover and a direction in which the rear cover is separated from the main cover. It is configured to be formed.

[0006]

[Operation] With the above configuration, when the tillage device B is raised as shown in FIG. 1, the operation lever 30 can be brought closer to the driver's seat U side. Therefore, the operator provided the operation lever 30 in the front-rear direction. It is easy to push the lever guide 31 backward along the guide hole 31a.

Therefore, as shown in FIG. 3, the bending link 32 is formed in an expanded shape, and the rear cover 21 can be slid backward by the pushing arm 13a to adjust the shallow till setting position. Further, by pulling the operation lever 30 from the position locked by the locking portion 31b and locking it to the locking portion 31c, the rear cover 21 can be quickly adjusted to the original deep tillage setting position. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the accompanying drawings. The rotary tiller B mounted on the three-point link hick mechanism A at the rear of the driver's seat U of the tractor 1 includes a main cover 1 fixed above the rotary 2.
The front end of the rear cover 21 is pivotally attached to the rear end position of the rear cover 3 via a horizontal frame 17 supported by a slide member (bracket) 22 constituting a slide mechanism S (FIG. 4) by a hinge 33 so as to be vertically rotatable. Then, the slide member 22 and the horizontal frame 17 are moved back and forth along a rail guide 14 (FIG. 4B) provided above the main cover 13 by a moving mechanism 19 described later to move the rear cover 21 back and forth. ing.

The main cover 13 fixed to the gear case, the chain case 12 and the like has a rail guide 1 on its upper surface.
4 is fixed, and a roller 15 is rotatably provided on the rail guide 14. A guide rail 16 curved inward in a U-shaped cross section is fitted in the two rows of rollers 15 on the main cover 13 so as to be slidable. At the rear end of the guide rail 16, a square pipe is provided in the horizontal direction as a rail frame, that is, a horizontal frame 17, and forms a support member for the rear end of the flexible plate 28 (rubber plate). .

The guide rail 16 is connected to a center part of a horizontal frame 17 by a pin 20 with a moving mechanism 19 attached to the top mast 10 and the main cover 13 as shown in FIG. (Fig. 1, Fig. 6)
The main cover 13 is operated by operating the
It is structured to slide up. That is, the moving mechanism 19 includes the main cover 13 that covers the tilling unit (rotary) 2.
To the rear cover 21 via the slide mechanism S (FIG. 4-B).
In the arrangement in which a tilling device B provided so as to be able to move back and forth is provided at the rear of the driver's seat U so as to be able to move up and down, the main cover 13 and the rear cover 21 are respectively raised by a bending link 32 composed of an operating arm 13a and a pushing arm 21a. And an operating lever 30 provided on the operating arm 13a is extended toward the vicinity of the driver's seat U, and an intermediate portion thereof is provided above the main cover 13 (top mast 1).
Locking portions 31b and 31c in which the rear cover 21 is slidably locked in two stages of a shallow till setting position and a deep till setting position at the front and rear portions of the guide hole 31a of the lever guide 31 provided at 0). Is formed.

Therefore, when the tilling device B is raised as shown in FIG. 1, the operator faces the rear from the driver's seat U and sets the operation lever 30 in the guide hole 31a formed in a straight long hole. The height of the rear cover 21 can be easily and reliably operated while preventing the erroneous operation by selectively pushing and pulling the lower cover 31b and the deep tillable stopper 31c. .

The middle part of the operation lever 30 is shown in FIG.
As shown in -A, it is configured such that it can be bent in a thickness direction like a leaf spring, and is urged in a state of being engaged with the locking portions 31b and 31c. The operating arm 13a is formed in an inverted U-shape, and its base is attached to a bracket projecting from the main cover 13 by a pivot pin 13b.
And the base of the operation lever 30 is fixed.

Further, as shown in FIG. 1, a hinge fitting 33a is provided on the lower surface of the horizontal frame 17, and the hinge fitting 33a is provided.
A rear cover 21 is rotatably supported at a shaft, and a rear portion thereof is supported and pressed by a rod 23 rotatably mounted on a bracket 22 fixed to the guide rail 16. 40 is a pressing spring 4 inserted into the rod 23.
This is a positioning stopper for setting the pressing force of No. 1.

Next, the joint between the lower surface of the main cover 13 and the lower surface of the rear cover 21 will be described. Main cover 1
A rubber plate (or a synthetic resin plate) 25 is bolted to a reinforcing plate formed at the rear portion of the lower surface of the lower surface 3, and the rubber plate 25 has a U-shaped space between the rubber plate 25 and the rear end of the main cover 13. Part is formed.

Further, another slightly thin rubber plate 28 is fixed on the lower surface of the rear end portion of the main cover 13 in the forward direction (toward the U-shaped space portion) with a plate and bolts, and is fixed to the horizontal frame (ie, rail frame). ) Secured to the lower surface of 17 with bolts. The rubber plate 28 has a structure in which the rear end portion is slightly projected so as to be in contact with the lower surface of the hinge portion 33 at the front end of the rear cover 21 to prevent intrusion of mud and the like.

FIGS. 1 and 2 show a state during deep plowing operation, in which the operation of the moving mechanism 19 causes the guide rail 16 to slide forward and the rear cover 21 to also move forward. FIG. 3 is a diagram showing a state in which the rail 16 is slid rearward in the shallow tillage operation and the rear cover 21 is also moved rearward.
In any case, a smooth shape without obstacles protruding downward from the lower surface of the rear cover 21 to the lower surface of the main cover 13 so that the soil tilled by the tilling claw 34 rotating in the direction of the arrow flows smoothly forward. Have been.

A leveling plate 50 is foldably attached to both lower ends of the rear cover 21 via hinges 51, as shown in FIG. When deep tilling work is performed by the tilling device configured as described above, the operation lever 30 of the moving function 19 is pulled toward the deep cultivation side (FIGS. 5 and 6) of the lever guide 31 to slide the rail 16 forward. When the rear cover 21 is moved forward as shown in FIG. 2, the rear lower surface of the rear cover 21 is raised, so that the rotary 2 can be deeply plowed in the soil, and the ground surface can be leveled. . At this time, the rubber plate 28, that is, the flexible plate is bent forward into a U-shape and is housed in the space between the rubber plate 25 and the reinforcing plate 24. The flow of the soil carried by the claws 34 becomes smooth, and there is no adhesion or accumulation of soil, so that a good tilling operation can be performed. In addition, the fulcrum position of the rear cover 21 also improves the soil flow by making the connection from the lower surface of the rear cover 21 to the lower surface of the main cover 13 smooth.

Next, when performing shallow tillage work, the operation lever 3
0 is pushed to the shallow side of the lever guide 31 to slide the rail 16 rearward as shown in FIG. 3 to move the rear cover 21 rearward. Then, while the rear cover 21 is supported by the suspension rods 23, it is possible to satisfactorily level the surface of the cultivated soil at the lower surface thereof, and to prevent scattering of soil during shallow tillage. At this time, since the rubber plate 28 is stretched from the bent state of FIG. 1 to the straight tension state of FIG. 3, the rubber plate 28 does not hang down, and the plate 31 supports the rubber plate 28 from below even in the middle. Therefore, the tilling nail 34 does not hit and be damaged. Further, the rubber plate 25 is extended rearward so as to close the space K between the rubber plate 28 and the reinforcing plate 24, and has a shape with no accumulation and good soil flow.

[0019]

The rotary cover operating device according to the present invention is a tractor tilling device comprising a tilling device having a rear cover provided at a rear portion of a main cover for covering a tilling portion, which is provided at a rear portion of a driver's seat so as to be able to move up and down. The main cover and the rear cover are connected from above with a bending link composed of an arm that operates respectively, and the operation lever provided on the operation arm is extended toward the vicinity of the driver's seat, and a halfway portion is provided above the main cover. And a plurality of locking portions formed in the guide holes of the lever guide so as to be adjustable so as to be adjustable in a direction in which the rear cover contacts the main cover and in a direction in which the rear cover is separated from the main cover.

Therefore, the operation lever 30 extended near the driver's seat U can be positioned in two steps on the locking portions 31b and 31c formed before and after the lever guide 31 with the tillage device B raised. By simply doing so, the slide adjustment of the rear cover 21 between the shallow till setting position and the deep till setting position can be quickly performed. Further, the operation can be performed quickly and easily from the driver's seat U, and when the mud or the like adheres to the slide mechanism S, the operation lever 30 is slightly moved back and forth without being forcedly operated. It can be performed without erroneous operation.

The main cover 13 and the rear cover 21
With the operation lever 30 linked forward and backward by the bending link 32, there is a feature that a simple and lightweight structure can be configured without any trouble, and that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a tractor according to an embodiment of the present invention.

FIG. 2 is a side view showing the operation of a cover mechanism during deep plowing work.

FIG. 3 is a side view showing an operation of a cover mechanism during a shallow tillage operation.

FIG. 4A is a plan view of a rotary plow.
(B) is a sectional view taken along line AA in (A).

FIG. 5 is a perspective view showing a configuration of a main part of a moving mechanism.

FIG. 6A is a rear view of the moving mechanism. (B) is a top view of a lever guide part.

[Explanation of symbols]

B Tilling device U Driver's seat 2 Rotary (tiling part) 10 Machine frame (top mast) 13 Main cover 13a Working arm 16 Guide rail 19 Moving mechanism 21 Rear cover 21a Push arm 30 Operating lever 31 Lever guide 31a Guide hole 31b, 31
c Locking part

Claims (1)

(57) [Claims] 1. A tractor tilling device having a cultivating device having a rear cover provided at a rear portion of a main cover that covers a cultivating portion and capable of moving up and down at a rear portion of a driver's seat, comprising an arm for operating the main cover and the rear cover. A plurality of latches which are connected from above by a bending link, extend an operation lever provided on the operation arm toward the vicinity of the driver's seat, and have a halfway portion formed in a guide hole of a lever guide provided above the main cover. A rotary cover operating device which is formed so as to be adjustable in a direction in which a rear cover comes into contact with the main cover and a direction in which the rear cover is separated from the main cover.