JP2007075048A - Rotary implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary implement which can highly accurately perform tilling works in response to various tilling conditions and various field conditions. <P>SOLUTION: This rotary implement in which a rotary cover 21 for covering a rotary tiller 19 comprises a main cover 22 fixed to an implement frame side to cover the upper side of the rotary tiller 19, an intermediate cover 23 disposed between the main cover 22 and a rear cover 24 and rotatably supported on the main cover 22, and the rear cover 24 rotatably supported on the intermediate cover 23 to cover the rear side of the rotary tiller 19 is characterized by disposing an intermediate cover-switching means for allowing and controlling the free rotation of the intermediate cover 23 in a prescribed range based on the main cover 22 between the main cover 22 and the intermediate cover 23, and a rear cover-switching means for allowing and controlling the free rotation of the rear cover 24 in a prescribed range based on the intermediate cover 23 between the intermediate cover 23 and the rear cover 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary working machine for tillage provided with a rotary tiller.

The rotary cover that covers the rotary for rotation is composed of a main cover that covers the top of the rotary, a rear cover that covers the rear of the rotary, and an intermediate cover that is interposed between the main cover and the rear cover. A rotary working machine is known which is fixed to the machine frame side, the intermediate cover is rotatably supported by the main cover, and the rear cover is rotatably supported by the intermediate cover (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 4-4801

  The rotary cover is configured such that the intermediate cover always rotates freely with respect to the main cover, so that the applicable tillage work is limited, and the accuracy of the tillage work may be reduced depending on the conditions. There was a drawback.

  The rotary working machine of the present invention for solving the above problems includes a rotary cover 21 that covers the rotary tiller 19, a main cover 22 that covers the upper side of the rotary tiller 19, and a rear cover 24 that covers the rear of the rotary tiller 19. An intermediate cover 23 interposed between the main cover 22 and the rear cover 24. The main cover 22 is fixed to the work machine frame side, and the intermediate cover 23 is rotatably supported by the main cover 22. In a rotary working machine in which the rear cover 24 is rotatably supported by the intermediate cover 23, a predetermined range of free rotation allowance and restriction between the main cover 22 and the intermediate cover 23 with respect to the main cover 22 is provided. Intermediate cover switching means is provided for switching between the intermediate cover 23 and the rear cover 24. It is characterized in that a rear cover switch means for switching between allowable and regulation of the free rotation in a predetermined range with respect to the bar 23.

  According to the structure of the present invention configured as described above, for example, the intermediate cover is fixed at a predetermined rotation angle with respect to the main cover (free rotation is restricted), and the rear cover is free with respect to the intermediate cover within a predetermined range. If it is possible to rotate, the intermediate cover functions as a part of the main cover, and the space at the upper rear of the rotary can be adjusted by setting and adjusting the fixed rotation angle of the intermediate cover.

  The rear cover is fixed at a predetermined rotation angle with respect to the intermediate cover (free rotation is restricted), and the intermediate cover can be freely rotated within a predetermined range with respect to the main cover. It functions as a part, can substantially increase the weight of the rear cover, and can move the pivot fulcrum forward. As described above, there is an effect that the tilling work according to various tillage conditions and field conditions can be performed with high accuracy.

  FIG. 1 is a side view of a rotary working machine 1 having a rotary cover of the present invention and a rear portion of a tractor 2 which is a work vehicle for connecting the rotary working machine 1. FIG. 2 is a plan view of the main part of the rotary working machine 1. The rotary work machine 1 includes a gear case 3 to which PTO power is input from the tractor 2 side.

  A top mast 4 made of a pair of left and right plates is attached to the gear case 3. At the upper front part of the top mast 4, there is provided a connecting portion 8 that is connected to an auto hitch 7 attached to a three-point link hitch 6 of the tractor 2. The rotary work machine 1 is connected to the rear of the tractor 1 via a three-point link hitch 6.

  The three-point link hitch 6 includes a top link 9 and left and right lower links 11. The lower link 11 is connected to a lift arm 12 and a lift rod 13 provided at the rear part of the tractor 1. The lift arm 12 is driven to swing up and down by hydraulic pressure or the like.

  The three-point link hitch 6 swings up and down as the lower arm 11 swings up and down as the lift arm 12 swings. The rotary work machine 1 moves up and down by the vertical swing of the three-point link hitch 6. The swing of the lift arm 12 is controlled by a microcomputer unit (not shown) provided on the tractor 1 side. The rotary work machine 1 is controlled to move up and down through a three-point link hitch 6 by a microcomputer unit.

  Pipe frames 14 protrude from the gear case 3 to the left and right. In FIG. 2, the tip side of the right pipe frame 14 is omitted. A chain case 16 is integrally provided at the outer end of the left pipe frame 14. A side frame (not shown) is integrally provided at the outer end of the right pipe frame 14.

The work machine frame is configured by the gear case 3, the pipe frame 14, the chain case 16, the side frame, and the like, and the claw shaft 17 is rotatably supported between the lower end side of the chain case 16 and the lower end side of the side frame. .

  The rotational driving force to the claw shaft 17 is transmitted from the chain case 16 to the claw shaft 17 side. A plurality of tilling claws 18 that perform tilling work on the field by rotation as in the past are attached to the pawl shaft 17 to constitute a rotary tilling device 19 serving as a tilling work section. In the rotary working machine 1, the rotary tiller 19 (cultivation claw 18) performs the cultivation work on the field by rotating the claw shaft 17.

  The rotary tiller 19 is covered with a rotary cover 21 at the upper and rear sides. The rotary cover 21 includes a main cover 22 that covers the upper front side of the rotary tiller 19, an intermediate cover 23 that covers the upper rear side of the rotary tiller 19, and a rear cover 24 that covers the rear side of the rotary tiller 19. ing.

  The main cover 22 is fixedly attached to the chain case 16 and the side frame side, and has an arc shape along the rotation trajectory of the tilling claw 18. The intermediate cover 23 is attached so that the front end thereof is pivotally supported on the main cover 22 side. The front end of the rear cover 24 is pivotally supported and attached to the intermediate cover 23 side.

  Main cover brackets 26 each having a substantially inverted U shape in plan view are fixedly attached to the left and right sides of the rear portion of the main cover 22. Intermediate cover brackets 27 having a substantially inverted U shape in plan view are fixedly attached to the left and right sides of the rear portion of the intermediate cover 23. A rear cover bracket 28 composed of a pair of left and right plates is fixedly attached to the left and right sides of the rear portion of the rear cover 24.

  A support shaft 29 is rotatably attached to the main cover bracket 26. A first suspension rod 31 is inserted into the support shaft 29 so as to be slidable back and forth. Thus, the first suspension rod 31 is attached to the main cover bracket 26 so as to be swingable up and down and slidable back and forth.

  A flange 32 is provided at the tip of the first suspension rod 31. The flange 32 prevents the first suspension rod 31 from coming off from the main cover bracket 26. The rear end of the first suspension rod 31 is pivotally connected to the intermediate cover bracket 27 so as to be rotatable. The intermediate cover 23 is suspended from the main cover 22 by the first suspension rod 31.

  A support shaft 33 is rotatably attached to the intermediate cover bracket 27 at a position above the connection point with the first suspension rod 31. A second suspension rod 34 is inserted into the support shaft 33 so as to be slidable back and forth. Thus, the second suspension rod 34 is attached to the intermediate cover bracket 27 so as to be swingable up and down and slidable back and forth.

  A flange 36 is provided at the tip of the second suspension rod 34. The flange 36 prevents the second suspension rod 34 from coming off from the intermediate cover bracket 27. The rear end of the second suspension rod 34 is pivotally connected to the rear cover bracket 28 so as to be rotatable. The rear cover 24 is suspended from the intermediate cover 23 by a second suspension rod 34.

  The first suspension rod 31 and the second suspension rod 34 are provided with a plurality of pin holes 37 perpendicular to the axis. As shown in FIG. 3, the main cover bracket 26 and the intermediate cover bracket 27 are provided with a pin insertion mechanism 39 through which a pin 38 can be inserted into and removed from the pin hole 37.

  The pin insertion mechanism 39 is configured integrally with the support shaft 29 of the main cover bracket 26 and the support shaft 33 of the intermediate cover bracket 27. Each of the support shafts 29 and 33 is hollow, and the above-described pin 38 is inserted coaxially and slidably. The pin 38 is stepped. A compression spring 41 is provided between the step portion 35 of the pin 38 and the end surfaces of the support shafts 29 and 33 so as to be fitted on the pin 38.

  The pin 38 is urged by the compression spring 41 in the direction to be inserted into the pin hole 37. However, a handle 43 having a cam surface 42 is pivotally supported at the projecting ends of the pins 38 from the support shafts 29 and 33. The cam surface 42 has a configuration in which an insertion restricting cam surface 42a and an insertion cam surface 42b in which the distance from the fulcrum shaft 44 of the handle 43 is long and short are continuous.

  The pin 38 is slid and fixed so that the pin 38 is separated from the pin hole 37 by bringing the insertion restricting cam surface 42 a into contact with the end surfaces of the support shafts 29 and 33, and the pin 38 is inserted into the pin hole 37. I will not. By bringing the insertion cam surface 42 b into contact with the end surfaces of the support shafts 29 and 33, the pin 38 is slid toward the pin hole 37 by the urging force of the compression spring 41 and is inserted into one of the pin holes 37.

  The pin insertion mechanism 39 is configured as described above. By restricting the insertion of the pin 38 into one of the pin holes 37 and the insertion of the pin 38 into the pin hole 37 by operating the handle 43, it can be performed.

  By restricting the insertion of the pin 38 into the pin hole 37, the flanges 32, 36 are connected to the support shaft 29, the first suspension rod 31 or the second suspension rod 34 with respect to the main cover bracket 26 or the intermediate cover bracket 27. It can be slid freely within the range of contact with 33. Thereby, the rotation of the intermediate cover 23 with respect to the main cover 22 and the rotation of the rear cover 24 with respect to the intermediate cover 23 can be made free (free rotation) within a predetermined range.

  By inserting the pin 38 into one of the pin holes 37, the above-mentioned free slide of the first suspension rod 31 or the second suspension rod 34 with respect to the main cover bracket 26 or the intermediate cover bracket 27 is restricted, and the main cover bracket 26 or the intermediate The protruding length of the first suspension rod 31 or the second suspension rod 34 from the cover bracket 27 to the rear can be adjusted and fixed.

  Thus, the free rotation of the intermediate cover 23 with respect to the main cover 22 or the free rotation of the rear cover 24 with respect to the intermediate cover 23 is restricted, and the rotation angle of the intermediate cover 23 with respect to the main cover 22 and the rear cover 24 with respect to the intermediate cover 23 are controlled. The rotation angle can be fixed in steps.

  A pin insertion mechanism 39 formed on the support shaft 29 of the main cover bracket 26 constitutes intermediate cover switching means for switching between allowing and restricting free rotation of the intermediate cover 23 with respect to the main cover 22 within a predetermined range. A pin insertion mechanism 39 formed on the support shaft 33 of the intermediate cover bracket 27 constitutes a rear cover switching means for switching between allowing and restricting free rotation within a predetermined range with respect to the intermediate cover of the rear cover.

  Potentiometers 46 and 47 are attached to the outer surfaces of one main cover bracket 26 and one intermediate cover bracket 27, respectively. As shown in FIG. 4, arms 48 are attached to the operation shafts of the potentiometers 46 and 47, respectively. The arm 48 of the potentiometer 46 of the main cover bracket 26 and the intermediate cover 23 are connected by a first rod 49.

  The arm 48 of the potentiometer 47 of the intermediate cover bracket 27 and the rear cover 24 are connected by the second rod 51. A rotation angle of the intermediate cover 23 with respect to the main cover 22 can be detected by a potentiometer 46 of the main cover bracket 26. A rotation angle of the rear cover 24 with respect to the intermediate cover 23 can be detected by a potentiometer 47 of the intermediate cover bracket 27.

  The outputs of both potentiometers 46 and 47 are input to the aforementioned microcomputer unit. The microcomputer unit is configured to control the swing drive of the lift arm 12 based on the outputs of both potentiometers 46 and 47. As a result, the rotary work machine 1 moves up and down based on the rotation angle of the intermediate cover 23 relative to the main cover 22 and the rotation angle of the rear cover 24 relative to the intermediate cover 23.

  The tilling depth is controlled by raising and lowering the rotary working machine 1. For this reason, for example, by adding the output values of the potentiometers 46 and 47 to control the tilling depth (raising and lowering the rotary work machine 1), the microcomputer unit is configured to provide more delicate and accurate control of the tilling depth. (Plowing depth control) can be performed. As a result, the tilling depth can be maintained by adding the output values of the potentiometers 46 and 47 regardless of which of the intermediate cover 23 and the rear cover 24 is fixed and which is free to rotate.

  When performing deep tillage work in a field or the like, as shown in FIG. 1, the intermediate cover 23 is fixed at a position where the intermediate cover 23 is rotated upward, and the rear cover 24 is free to rotate. Functions as a part of the main cover 22, and a relatively large space can be provided in the upper rear portion of the rotary tiller 19. Thereby, the flow of tilling soil behind becomes smooth.

  And since the tilled soil is leveled only with the rear cover 24, the leveling force (gravity for leveling) is light, and the tilling surface can be pushed excessively, dragging due to excessive pressing of the tilling surface, power loss, etc. can be reduced. The tillage work can be done smoothly.

  In the case of performing plowing or shallow tillage work, as shown in FIG. 5, the rear cover 24 is rotated downward and fixed in a state along the rotation locus of the tillage claw 18, and the intermediate cover 23 is rotated. Is made free, the space at the upper rear of the rotary tiller 19 is made relatively small, and the intermediate cover 23 substantially functions as a part of the rear cover 24.

  As a result, rearward tillage of the tillable soil is restricted, the rotation of the tillable soil by the rotary tiller 19 (cultivation pawl 18) increases, and the soil breaking performance is improved. Further, since the intermediate cover 23 and the rear cover 24 integrally level the cultivated soil, the leveling force (gravity for leveling) increases and leveling performance is improved.

  When the rotation of the rear cover 24 with respect to the intermediate cover 23 is fixed, the rear cover 24 and the intermediate cover 23 rotate integrally around the rotation fulcrum of the intermediate cover 23, so that the rear cover 24 and the intermediate cover 23 substantially serve as the rear cover. And the length of the rear cover is extended.

  For this reason, the amount of lift of the rotary work machine 1 based on the detection of the rotation amount of the rear cover 24 by the potentiometer 47 of the intermediate cover bracket 27 is used as the rotary work machine 1 based on the detection of the rotation amount of the intermediate cover 23 by the potentiometer 46 of the main cover bracket 26. As compared with the rear cover constituted by the integrated intermediate cover 23 and rear cover 24, the amount of lift of the rotary working machine 1 when the rear cover 24 alone swings is reduced. Decrease. As a result, the rotary working machine 1 is prevented from being lifted and lowered by a slight swing of the rear cover 24, stable tilling control is performed, and tilling work is performed stably.

  Even when general (standard) tillage work is performed, the rotation of the intermediate cover 23 and the rear cover 24 is arbitrarily fixed or free according to the field condition and the work condition. The space at the upper rear can be adjusted, and by increasing the space, the reversing performance of the cultivated soil can be improved, and by reducing the space, the ground breaking and leveling performance can be improved, and the finishing can be improved. Can be.

  Further, the rotation angle of the intermediate cover 23 can be arbitrarily set according to various heights of working machines such as a vertical machine and a molding machine mounted on the rear side of the rotary 19, and it is easy for the above various working machines. It can correspond to.

  The intermediate cover 23 is formed in a box shape by bending or bending the plate, and the longitudinal length thereof is substantially the same as or slightly shorter than the longitudinal length of the rear cover 24, thereby increasing the strength of the intermediate cover 23. be able to.

It is a side view of the rear part of the tractor which connects the rotary working machine of a deep tillage work state, and a rotary working machine. It is a principal part top view of a rotary working machine. It is principal part sectional drawing of the spindle periphery which shows a pin insertion mechanism. It is a principal part top view around a potentiometer. It is a side view of the rear part of the tractor which connects the rotary working machine of a shallow tillage work state, and a rotary working machine.

Explanation of symbols

19 Rotary tiller 21 Rotary cover 22 Main cover 23 Intermediate cover 24 Rear cover

Claims (1)

  A rotary cover (21) covering the rotary tiller (19), a main cover (22) covering the top of the rotary tiller (19), a rear cover (24) covering the rear of the rotary tiller (19), and a main cover (22) and an intermediate cover (23) interposed between the rear cover (24), the main cover (22) is fixed to the work machine frame side, and the intermediate cover (23) is the main cover (22). ) And a rear cover (24) rotatably supported by the intermediate cover (23), the intermediate cover is interposed between the main cover (22) and the intermediate cover (23). Intermediate cover switching means for switching between allowing and restricting free rotation within a predetermined range with respect to the main cover (22) of (23) is provided, and the intermediate cover (23) and the rear cover (24) During the rotary working machine provided with a rear cover switch means for switching between allowable and regulation of the free rotation in a predetermined range relative to the intermediate cover (23) of the rear cover (24).

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