JP2671868B2 - Rotary tilling equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cultivating device, and more particularly, a pivot mechanism between an upper cover and a rear cover is vertically moved by an adjusting mechanism. The present invention relates to an improvement of a rotary cultivating device configured to be adjustable. 2. Description of the Related Art
As a rotary cultivator of this type, it has been put into practical use in Shokai 57-15490.
The one disclosed in No. 1 is known. In the one described in this publication, the cultivating cover is rotated in association with the movement of the depth frame, and the depth frame is adjusted by the depth frame adjusting handle, so that the cultivating cover and the rear cover are deep frame. The tilted position is maintained with the rotation of the. The relationship between the height of the tilling shaft and the height of the rear cover and the tilling cover is substantially the same, and the upper surface of the rotary shaft of the tilling claw is always covered with the tilling cover and the rear surface is covered with the rear cover. The rotation adjustment of the depth frame is performed by rotating the depth frame adjustment handle.
If you turn this adjustment handle, the depth frame will move up and down,
Along with this, the position of the cultivating cover is configured to rotate via the connecting rod pivotally connected to the depth frame and the pivot pin. Further, a device using a turnbuckle in place of the connecting rod is also disclosed. That is, the depth frame
Instead of rotating the bar up and down, the length of the turnbuckle is adjusted to rotate the tiller cover back and forth. Moreover, one of the turnbuckles is pivotally attached to the depth frame, and the other is pivotally attached to the rear part of the tillage cover. Since the depth frame rotates with the vertical movement of the tail wheel, the support mechanism of the turnbuckle is unstable and the operation of accurately determining the pivotal fulcrum position of the cover is troublesome. Is. Further, when the pivotal fulcrum positions of the tilling 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 adjusting handle to rotate the depth frame at the height position. To rotate and adjust the tillage cover and the rear cover through the connecting rod, or in the same manner, the operator descends from the driver's seat of the tractor and adjusts the turnbuckle to adjust the tillage cover. Since the rear cover is pivotally adjusted, the operation is troublesome and the workability is poor. Therefore, there arises a technical problem to be solved so that the vertical adjustment operation of the pivotal fulcrum position of the cover can be performed easily, quickly and accurately. Aims to solve this problem. The present invention has been proposed to solve the above problems, and therefore, the following technical means were taken. That is, the rotary cover comprises an upper cover that covers the upper part of the cultivating body and a rear cover that is pivotally attached to the rear part of the upper cover and covers the rear of the cultivating body. In a rotary cultivating device in which a pivotal joint between the rear cover and the rear cover is configured to be vertically adjustable by a cover adjusting mechanism, the cover adjusting mechanism is a linear movement type drive member that can extend and contract in the longitudinal direction. The upper end of the drive member is attached to a machine frame fixed above the upper cover and fixed to the upper cover at the other end, and the rod of the drive member is extended by remote control from the cockpit. The rotary cultivating device is configured so that the pivotal portion moves downward when the rod is shortened and moves upward when the rod is shortened. When the rod of the linear movement type driving member which constitutes the cover adjusting mechanism is expanded and contracted, the rod moves in the front-rear direction, and the upper and lower positions of the pivotal joint between the upper cover and the rear cover are moved. Can be adjusted accurately. At this time, the up and down adjustment can be easily performed by remote control from the cockpit, so the operability is good. Embodiments of the present invention will be described below with reference to the drawings. For the sake of explanation, a conventionally known configuration and related technical matters will be explained at the same time. In the figure, the rotary tiller 4 is connected to the hitch 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 lever 5. The left and right lift arms 8 and 8 which are moved up and down by means of the left and right lift rods 9 and 9 move the connecting arm 3 up and down around the hitch pin 10 to thereby move the rotary tiller 4 to a predetermined vertical position. To control. An upper cover 12 that covers the vicinity of the upper part of the tiller 11 is hinged 15 to a left drive case 14 and a right side station (not shown) as the device frame 13 of the rotary tiller 4, for example. The front part is pivotally attached by means of which the upper cover 12 can be swung in the vertical direction around the hinge 15, and the rear cover 16 covering the rear of the tiller 11 is provided at the rear end of the upper cover 12. The front end of the hinge 17 is pivotally attached so that the rear cover 16 can swing up and down with the hinge 17 as a fulcrum, and the cover is attached to the arm 18 provided rearward from the machine frame 13 of the apparatus. Pushing device 19
The rear cover 16 is pushed down by this so that the rear edge of the rear cover 16 is elastically pressed against the surface of the cultivated soil. The positions of the pivot points of the upper cover 12 and the rear cover 16 can be adjusted to a desired height by the cover adjusting mechanism 20, and the cover adjusting mechanism 20 of the illustrated example includes: An adjusting cylinder 22 which is a linear movement type driving member is connected to a fixed side working arm 21 which is obliquely and upwardly projected from the machine frame 13, and an adjusting piston rod 23 of the adjusting cylinder 22 is connected to the upper cover 12. An adjustment lever 24 provided near the cockpit by connecting to a mounting plate 12a provided at the rear of the vehicle.
By operating the control valve 25, the control valve 25 acts to supply or discharge the pressure oil of the hydraulic pump to the adjusting cylinder 22, and the upper cover -1
The rear part 2 and the front part of the rear cover 16 are configured to move up and down. In the cover depressing device 19 of the illustrated example, a depressing rod 28 is freely movably inserted vertically into a boss 27 pivotally attached to the arm 18 by a pin 26, and the lower part is connected to the rear cover 16. The rod 28 is pushed down by a spring 30 interposed between the boss 27 and the seat plate 29. In the illustrated example, the protrusion length l of the push rod 28 protruding upward from the boss 27 is detected by a protrusion length sensor S such as a linear movement type potentiometer to determine the working depth. Rear cover 16 when changed
The length l of the projecting portion also fluctuates with the swinging of the. However, by vertically moving the pivot positions of the rear cover 16 and the upper cover 12, the projecting length l is always set to a substantially constant set value. In order to maintain it, the operation of the control valve 25 is automatically controlled by a command from the control unit in the illustrated example. Therefore, the cover adjusting mechanism 20 is actuated to vertically adjust the pivotal positions of the upper cover 12 and the rear cover 16, so that when the tiller 11 is lowered to deepen the working depth. , The rear cover 16 can be adjusted by adjusting the height of the pivotal position to the ground so that it is almost unchanged, that is, by raising the pivotal position with respect to the machine frame 13.
Since the rear part of the cultivated body 11 approaches the cultivated body 11,
It is possible to prevent the cultivated soil scattered from 1 from being scattered to the rear far away, and to store it near the rear of the cultivated body 11, which makes it suitable for embankment during ridge work, and when the cultivating depth becomes conversely shallow. If the height of the ground at 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, the rear cover 16 moves away from the tiller 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 cover adjusting mechanism according to the present invention is composed of a linearly moving type drive member which is capable of expanding and contracting in the longitudinal direction, and when the rod is extended by remote control from the cockpit, the upper cover and the rear cover are pivoted. The connecting part moves downward, and when the rod is shortened, the pivoting part moves upward, and the vertical position of the pivoting part of the cover can be adjusted simply by expanding and contracting the rod. It has a simple structure and is easy to operate because it can be adjusted by remote control. Further, since the drive member for adjusting the position of the pivotal portion is formed of the linear movement type member, it is not bulky,
It can be installed between the machine frame on the fixed side and the upper cover by inclining above the upper cover, and it does not overhang significantly from the rotary tiller, so the overall structure of the device is rational. Be compact and compact.

[Brief description of the drawings] FIG. 1 is a side view of a rotary tiller. [Explanation of symbols] 4 Rotary Tillage Equipment 11 tillage 12 Upper cover 16 Rear cover 20 cover adjustment mechanism

Claims (1)

(57) [Claims] An upper cover that covers the upper part of the cultivated body of the rotary cultivator.
And a rear cover that is pivotally attached to the rear of the upper cover and covers the rear of the tillage, and the pivotal connection between the upper cover and the rear cover is vertically adjusted by the cover adjusting mechanism. In a rotary cultivator configured to be adjustable to
The cover adjusting mechanism is composed of a linearly movable type driving member that is capable of expanding and contracting in the longitudinal direction, and is above the upper cover and has one end attached to a fixed machine frame and the other end. Is
The top cover - is secured to, before by remote control from the cockpit
The rotary tiller according to the present invention is characterized in that when the rod of the drive member is extended, the pivot portion is moved downward, and when the rod is shortened, the pivot portion is moved upward.