JPH0539207U - Rotary tiller - Google Patents

Abstract

(57) [Summary] [Object] To prevent the rear cover 11 from being deformed and damaged due to contact with a field scene by automatically raising the rear cover 11 to the upper position in accordance with the backward operation of the agricultural tractor. [Structure] The traveling transmission of a mobile agricultural machine and the rear cover moving means 14, 14a are connected to each other, and when the transmission is operated backward, the rear cover moving means pulls up the rear cover 11 to an upper position. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to moving a rear cover of a rotary tiller mounted on a mobile agricultural machine.

[0002]

[Prior Art]

 Conventionally, the rear cover 11 provided on the rotary cultivator 3 is configured to be vertically swingable, and the rear cover swing fulcrum (fulcrum 12) is vertically adjusted according to the change of the working depth of the tillage, whereby the rear cover 11 is adjusted. The grounding posture of the plant is maintained in an appropriate state to improve the accuracy of rotary tillage. That is, when the plowing depth is shallow, the rear cover swinging fulcrum is moved rearward and downward, and when the plowing depth is deep, the rear cover swinging fulcrum is moved forward and upward to perform the rotary plowing work.

[0003]

[Problems to be solved by the device]

 However, conventionally, for example, when the plowing depth is shallow, the rear cover moving means is operated to move the rear cover swinging fulcrum rearward and downward so that the tip of the rear cover 11 is located below the lower end of the rotary tiller 3. . When the rear cover swinging fulcrum is moved rearward and downward, when the operator moves the rotary farming device 3 backward while moving the rotary tiller 3 in order to match the tilling start position with the already tilled position, as shown in FIG. As shown by the two-dot chain line, there is a problem that the tip of the rear cover 11 hits the field first, and the rear cover 11 is deformed and damaged if the aircraft moves backward while the tip is hit. Also, when performing work while maintaining the rotary tiller 3 at a predetermined working depth in the reverse state of the machine, if the rear cover swing fulcrum is in a state of being moved rearward and downward, similar to the above, the rear cover 11 of the rear cover 11 is moved. Deformation and damage will occur.

[0004]

[Means for Solving the Problems] The present invention was devised with the object of providing a rotary tiller capable of eliminating these drawbacks in view of the above-mentioned circumstances, and provides a mobile farming machine. In the rotary cultivating device, in which a rear cover 11 is provided at the rear part of the mounted rotary cultivating device 3 so as to be vertically swingable, and rear cover moving means 14, 14a are connected to the rear cover 11, the traveling transmission device and the rear cover of the mobile agricultural machine. When the moving means 14 and 14a are connected to each other and the transmission is operated in the backward direction, the rear cover moving means pulls up the rear cover 11 to the upper position and operates to solve the above problems.

[0005]

[Operation effect]

 Based on the above structure, the rear cover swing fulcrum is moved downward and rearward when the working depth is shallow, and the rear cover swing fulcrum is moved forward and upward when the working depth is deep so that the rear cover 11 is in the proper grounding posture. The rear cover 11 can be automatically lifted to the upper position by the rear cover moving means 14 and 14a when the mobile agricultural machine is operated in the reverse direction, while the rotary cultivating work can be carried out with high accuracy. It Therefore, the rear cover 11 of the rotary tiller 3 moves rearward and downward at the swing fulcrum of the rear cover when the plowing depth is shallow, and the tip of the rear cover 11 is located below the lower end of the rotary tiller 3. Even when the worker moves the mobile agricultural machine backward while lowering the rotary tiller 3, the rear cover 11 is automatically pulled up to the upper position according to the backward operation, and the front end of the rear cover 11 is moved to the field first as in the conventional case. It is possible to prevent the rear cover 11 from being deformed and damaged by hitting and hitting, or the body moving backward while hitting. In addition, even when performing work while maintaining the rotary tiller 3 at a predetermined working depth in the reverse state of the machine, if the rear cover swing fulcrum is moved rearward and downward, the mobile agricultural machine is similarly moved. The rear cover 11 is automatically pulled up to the upper position when the vehicle is moved backward, and deformation and damage of the rear cover 11 can be prevented.

[0006]

Embodiment Next, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes an agricultural tractor body of a mobile agricultural machine, and a rotary tiller 3 is movably connected to a rear portion of the body 1 through an elevating link mechanism 2. The basic structure such as lifting and lowering by the swing of the lift arm 5 accompanying the expansion and contraction operation of the hydraulic cylinder 4 is the same as the conventional one.

Reference numeral 6 denotes a main cover of the device 3, which is formed in an arc shape so as to cover a tilling claw 8 attached to a tilling claw shaft 7, and has a front and rear facing direction on its upper surface. A pair of right and left roller brackets 10 to which a plurality of guide rollers 9 arranged in parallel are attached. Further, 11 is a rear cover provided at the rear end portion of the rotary tiller 3, the rear cover 11 being attached to a support shaft 12 which is a swing fulcrum of the rear cover 11 so as to be vertically swingable. As shown in FIG. 3, a pair of guide rails 13 curved in an arc shape along the peripheral surface of the main cover 6 and having a substantially U-shaped cross section are fixedly mounted. The guide rollers 9 of the bracket 10 are fitted onto the respective rollers. In other words, the rear cover 11 is movable along an arc centered on the tillage pawl shaft 7, and moves to the deep plowing posture side moved to the front and the shallow plowing posture side moved to the rear to always provide an optimum condition. It is possible to maintain the grounding posture.

Reference numeral 14 denotes an electric cylinder attached to the top mast 15 of the rotary tiller 3, and the electric cylinder 14 and the electric motor 14a constitute rear cover moving means. Then, the rear cover 11 (support shaft 12) to which the tip of the electric cylinder 14 is pivotally connected is moved by expanding and contracting the electric cylinder 14 by the rotation of the electric motor 14a based on an operation command from the control unit 16 described later. It is like this. Reference numeral 17 is a pressure rod for constantly urging the rear cover 11 downward. The tip side of the pressure rod 17 is pivotally connected to the rear cover 11, and the base end side of the pressure rod 17 has the above-mentioned guides. The rail 13 is pivotally supported between a pair of left and right support plates 18 fixed to the upper surface of the rear end of the rail 13. Further, 19 is a tilling depth sensor, and this tilling depth sensor 19 is constituted by a so-called potentiometer, which is fixed to the outer surface of the support plate 18, and has a sensor arm 21 and a sensor rod 22. It is connected to a bracket 23 which is integral with the rear cover 11 via. Therefore, the tillage depth sensor 19 attached to the support plate 18 detects the swing of the rear cover 11 due to the change in tillage depth, and outputs the detection result to the control unit 16.

Then, the control unit 16 controls the electric cylinder 14 based on the tilling depth setting set by rotating the tilling depth setting dial 25 attached to the control panel 24 provided near the driver's seat of the machine body 1. The expansion / contraction target value is determined, the electric motor 14a is rotationally controlled until the value of the stroke sensor 14b matches the target value, and when the plowing depth is shallow, the support shaft 12 of the rear cover 11 is moved downward and rearward. When the depth is deep, the support shaft 12 of the rear cover 11 is moved forward and upward to maintain the rear cover 11 in the optimum grounding posture corresponding to the set value of the working depth. Reference numeral 26 is a position lever for raising and lowering the rotary tiller 3, and 27 is an ON / OFF switch for automatic plowing depth / inclination. Reference numeral 28 schematically shown in FIG. 5 denotes a PTO gear shift lever switch, and 29 denotes a traveling gear shift lever switch. The detection results of the switches 28 and 29 are also output to the control unit 16.

As shown in the operation explanatory view of FIG. 6, when the plowing depth is set to shallow plowing and the PTO shift lever switch 28 detects the neutral (N) of the PTO shift, the electric cylinder 14 contracts and the rear cover 11 is moved to the upper position. Pull it up to operate. Further, when the PTO gear shift switch 28 is in the ON state of the PTO gear shift and the traveling gear shift lever switch 29 detects that the traveling gear shift is backward (back), the electric cylinder 14 is also contracted at this time and the rear cover 11 is pulled up. Make it work. In this way, the traveling transmission and the electric cylinder 14 that is the rear cover moving means are connected.

In the embodiment of the present invention configured as described above, with the setting of the plowing depth of the automatic plowing depth control, the support shaft 12 serving as the swinging fulcrum of the rear cover is moved in the vertical direction, and the rear cover 11 is moved. The grounding posture of the vehicle is maintained in an appropriate state to improve the accuracy of rotary tilling work. Further, the rear cover 11 is an electric cylinder 14 which is a rear cover moving means when the vehicle is operated backward by the traveling transmission of the machine body 1. And the electric motor 14a automatically raises it to the upper position. Therefore, when a worker moves the agricultural tractor backward while lowering the rotary tiller 3, or when the agricultural tractor moves backward, the position lever 26 is used. Even when performing work while maintaining the rotary tiller 3 at a predetermined working depth, the swinging fulcrum of the rear cover should be moved downward and rearward. Then, the rear cover 11 is automatically pulled up to the upper position with the backward operation of the agricultural tractor, and the deformation and damage of the rear cover 11 can be prevented.

[Brief description of drawings]

FIG. 1 is a side view in which a rotary cultivating device 3 is mounted on an agricultural tractor body 1.

FIG. 2 is a plan view of the rotary tiller 3.

FIG. 3 is an exploded perspective view of the rotary tiller 3.

FIG. 4 is a plan view of a control panel 24.

5 is an explanatory diagram showing a circuit configuration of a control unit 16. FIG.

FIG. 6 is an operation explanatory view according to the present invention.

[Explanation of symbols]

 3 Rotary Tilling Device 11 Rear Cover 12 Rear Cover 11 Support Shaft as a Swing Support Point 14 Electric Cylinder 14a Electric Motor 29 Travel Gear Shifter Switch

Claims (1)

[Scope of utility model registration request] 1. A rotary device (3) mounted on a mobile agricultural machine.
A rear cover (11) is provided on the rear part so that it can swing up and down.
Rear cover moving means (14, 1) is attached to the rear cover (11).
4a) are connected to each other in a rotary cultivating device, wherein the traveling transmission device and the rear cover moving means (14,
14a), and when the transmission is operated in the reverse direction, the rear cover moving means pulls up the rear cover (11) to an upper position to operate the rotary tiller.