JPH0634641B2 - Rotary tiller - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cultivator, and more particularly, to an improvement of a rotary cultivator configured such that a pivotal joint between an upper cover and a rear cover can be vertically adjusted by an adjusting mechanism.

[Prior Art and Problems to be Solved by the Invention]

Conventionally, as a rotary cultivator of this kind, it has been put into practical use as Shokai 57-154
The one disclosed in No. 901 is known. Thus, in the one disclosed in the publication, the tilling cover rotates in conjunction with the movement of the depth frame, and the depth frame is adjusted by the depth frame adjusting handle so that the tilling cover and the rear cover are moved. The tilting position is maintained as the depth frame rotates. Thus, the relationship between the height of the tilling shaft and the heights of the rear cover and the tilling cover is almost the same, and the upper surface of the tilling claw rotating shaft trace is always covered with the tilling cover,
The rear surface is covered with a rear cover. The rotation adjustment of the depth frame is performed by rotating the depth frame adjustment handle. When the adjusting handle is turned, the depth frame moves up and down, and accordingly, the position of the tilling cover is rotated via a connecting rod pivotally connected to the depth frame by a pivot pin. Further, a device using a turnbuckle instead of the connecting rod is also disclosed. That is, instead of vertically rotating the depth frame, the length of the turnbuckle is adjusted to rotate the tillage cover back and forth. Moreover, one of the turnbuckles is pivotally supported on the depth frame, and the other is pivotally supported on the rear part of the tillage cover. Since the depth frame rotates with the vertical movement of the tail wheel, the supporting mechanism of the turnbuckle is unstable and the operation of accurately determining the pivot point of the cover is troublesome. Further, when the pivot support positions of the tillage cover and the rear cover are to be adjusted, the operator descends from the driver's seat of the tractor and rotates the depth frame adjustment handle to rotate the height position of the depth frame. The rotary cover and rear cover via the connecting rod, or similarly, the operator descends from the driver's seat of the tractor and rotationally adjusts the turnbuckle to adjust the rotary cover and rear cover. Therefore, the operation is troublesome and the workability is poor. Therefore, there arises a technical problem to be solved in order to enable the vertical adjustment operation of the pivotal fulcrum position of the cover to be performed easily and quickly, and accurately.
The present invention aims to solve the problems.

[Means for Solving the Problems]

The present invention has been proposed in order to achieve the above object, and an upper cover that covers the upper part of a cultivating body of a rotary cultivating device, and a rear cover that is pivotally attached to the rear part of the upper cover and covers the rear of the cultivating body. A rotary cultivating device having a pivotally connecting part between the upper cover and the rear cover and being vertically adjustable by a cover adjusting mechanism, wherein the cover adjusting mechanism is fixed to an equipment frame. And
It is interposed between the working arm projecting obliquely upward and rearward and the mounting plate provided on the rear part of the cover, and further, the adjusting mechanism is operated by an operating member provided near the cockpit. A rotary tiller formed is provided.

[Action]

The cover adjusting mechanism is fixed to the machine frame of the apparatus, and is interposed between the working arm projecting obliquely upward and upward, and the mounting plate provided at the rear end of the upper cover. The support for is strong. Therefore, the pivotal position of the cover can be adjusted accurately by operating the operating member. Further, since the operating member is provided in the vicinity of the cockpit, the operator can quickly change the pivotal fulcrum position of the cover while sitting on the cockpit, and the operability is extremely good.

【Example】

An embodiment of the present invention will be described below with reference to the attached drawings. For the sake of convenience of description, a conventionally known configuration and related technical matters will be described at the same time. In the figure, the rotary tiller 4 is connected to the hitch portion 2 of the tractor 1 via the connecting arm 3, and the lift piston 7 of the lift cylinder 6 of the hydraulic lift mechanism is moved in and out with the operation of the lift operation lever 5. The left and right lift arms 8 and 8 that operate move the connecting arm 3 up and down around the hitch pin 10 via the left and right lift rods 9 and 9, thereby controlling the rotary tiller 4 to a predetermined vertical position. is there. An upper cover 12 which covers the vicinity of the upper part of the cultivator 11 is attached to a front part of the rotary cultivator 4 by means of a hinge 15 on a drive case 14 on the left side and a side stay (not shown) on the right side as a device frame 13, for example. To allow the upper cover 12 to swing up and down about the hinge 15,
A rear cover 16 covering the rear of the tiller 11 is pivotally attached to a rear edge of the upper cover 12 by a hinge 17 so that the rear cover 16 can swing up and down with the hinge 17 as a pivot. The rear cover 16 is pushed down by the cover pushing device 19 attached to the arm 18 provided rearward from the machine frame 13, whereby the rear edge of the rear cover 16 is elastically pressed against the cultivated soil surface. I am trying to do it. The position of the pivot point of the upper cover 12 and the rear cover 16 can be adjusted to a desired height by a cover adjusting mechanism 20. The cover adjusting mechanism 20 in the illustrated example is obliquely rearward and upward from the device frame 13. The adjusting cylinder 22 is connected to the working arm 21 protruding from the mounting arm 12 and the adjusting piston 23 of the adjusting cylinder 22 is attached to the mounting plate 12a provided at the rear of the upper cover 12.
The control valve 25 acts to supply or discharge the pressure oil of the hydraulic pump to or from the adjusting cylinder 22 by operating the adjusting lever 24 provided in the vicinity of the cockpit. The rear portion of the upper cover 12 and the front portion of the rear cover 16 are vertically moved. In the cover pushing device 19 of the illustrated example, a pushing rod 28 is movably inserted into a boss 27 pivotally attached to the arm 18 by a pin 26 so that the pushing rod 28 is vertically movable, and the pushing rod 28 connecting the lower portion to the rear cover 16 is Spring 3 interposed between 27 and seat plate 29
It is pushed down by 0. In the illustrated embodiment, the protrusion length l of the push rod 28 protruding from the boss 27 from above is detected by a protrusion length sensor S such as a linear movement type potentiometer to change the working depth. When the rear cover 16 swings, the projection length l also changes. However, by vertically moving the pivot positions of the rear cover 16 and the upper cover 12, the projection length 1 is always substantially constant. The operation of the control valve 25 is automatically controlled by a command from the control unit in the illustrated example so as to be maintained at the set value of. Therefore, since the pivotal positions of the upper cover 12 and the rear cover 16 are vertically adjusted by operating the cover adjusting mechanism 20, when the tiller 11 is lowered to deepen the plowing depth, the grounding position of this pivoting position is increased. If the height of the rear cover 16 is adjusted so as to raise the pivot position with respect to the equipment frame 13, the rear portion of the rear cover 16 approaches the cultivated body 11, so that the cultivated body 11 It is possible to prevent the cultivated soil that is scattered from the rearward and far away from the cultivated body 11, and to store the cultivated soil near the rear of the cultivated body 11, which is suitable for embankment at the time of ridge work. If the ground height of the pivot position is not changed, that is, if the pivot position is adjusted so as to be lowered with respect to the machine frame 13,
Since the rear cover 16 is moved away from the cultivated body 11, the collision force of the cultivated soil scattered from the cultivated body 11 is reduced, and the leveling function of the rear cover 16 is sufficiently maintained.

【The invention's effect】

As will be described in detail in the above embodiment, the present invention has a cover adjusting mechanism fixed to the machine frame of the apparatus, and is provided at the rear end portion of the upper cover and the working arm projecting obliquely upward. Since it is interposed between the cover adjusting mechanism and the mounting plate, the support of the cover adjusting mechanism is strong. Therefore, if the operator operates the operation member, the pivot point of the cover can be adjusted accurately. At this time, since the operation member is provided in the vicinity of the cockpit, the operator can operate it while sitting in the cockpit, and therefore the vertical adjustment of the pivot point of the cover can be performed very easily and quickly. Therefore, workability is also improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 4 ... Rotary tiller, 11 ... Tiller, 12 ... Top cover, 13 ... Machine frame, 16 ... Rear cover, 17 ... Hinge, 20 ... Cover adjusting mechanism, 21 ... Working arm, 24 ... Adjusting lever

Claims (1)

[Claims] 1. A rotary tiller having an upper cover for covering an upper part of a tiller and a rear cover pivotally attached to a rear part of the upper cover for covering a rear part of the tiller, and the upper cover and the rear cover. In a rotary cultivating device having a pivot adjusting portion which can be vertically adjusted by a cover adjusting mechanism, the cover adjusting mechanism is fixed to the machine frame and is obliquely projected upward. The rotary mechanism, which is interposed between the arm and a mounting plate provided on the rear portion of the cover, and further, the adjusting mechanism is formed so as to be operated by an operating member provided near the cockpit. Tillage equipment.