JP5647886B2 - Rotary work machine - Google Patents

Description

  The present invention relates to a pawl shaft that is rotated by a driving force from a power source, a plurality of tilling claws protruding outward in the radial direction of the pawl shaft, a rotary cover that covers the tilling pawl from above, and a rear cover of the rotary cover. The present invention relates to a rotary working machine having a rear cover attached to an end so as to be rotatable in the vertical direction.

  Conventionally, a rotary work machine is connected to the rear part of a tractor and the like to perform tillage work, etc., a tilling claw that is rotated by a driving force from the tractor, a rotary cover that covers the cultivation claw from above and from the front, and a rear part of the tilling claw A rear cover that covers the ground, and a leveling plate fixed to the lower end of the rear cover. And the tilling claw was rotated and the soil in the field was cultivated to flatten the cultivated soil that became rough terrain with a leveling plate. However, since the rear cover rotates only in the front-rear direction (the advancing direction of the aircraft), the rear cover can follow the undulations in the advancing direction by rotating back and forth, but the vehicle width direction (perpendicular to the advancing direction) There is a problem that the soil thickness of the cultivated soil to be leveled becomes uneven.

  Therefore, as in Patent Document 1, a left and right swinging portion that is attached to the approximate center of the rear end of the rotary cover and that can be rotated in the left and right direction (vehicle width direction of the fuselage), and the center portion are fixed to the left and right swinging portion. A rotary working machine is disclosed that includes an installed rear cover rotation shaft, a rear cover attached to the rear cover rotation shaft, and a leveling plate connected to a lower end of the rear cover. According to this technology, the rear cover can tilt freely in the front / rear / left / right direction of the fuselage, so that the leveling plate can follow complicated undulation terrain and level the cultivated soil with a uniform thickness. to enable.

JP-A-10-56803

  However, in the technique of Patent Document 1, the left and right swinging portion cannot be attached to and detached from the rotary cover. For this reason, when the left / right swinging part that swings in the left / right (vehicle width) direction is worn, it cannot be replaced, and there is a possibility that the service life of the entire rotary working machine may be shortened. Therefore, the present invention is to provide a rotary working machine that is detachably provided with a left and right swinging portion that allows a rear cover to swing left and right.

For this reason, the invention according to claim 1 is a claw shaft that rotates in a traveling direction by a driving force from a power source;
A plurality of tilling claws extending in the radial direction of the claw shaft;
A rotary cover that covers the tillage nail from above;
A left and right swinging portion provided with a swinging member attached to substantially the center of the rear end of the rotary cover and swingable in the width direction of the airframe;
A rear cover rotation shaft that attaches a central portion to the rocking member and is rotatable in the forward / backward direction of the airframe;
In a rotary working machine comprising a rear cover fixed to the rear cover rotating shaft,
And the swing member which is fixed to the rotation shaft provided in the right and left rocking part, connecting plate and is characterized Rukoto is detachably fixed to supporting shaft said rear cover times.

The invention according to claim 2 is the rotary working machine according to claim 1, wherein side frames are respectively fixed to both sides of the rotary cover,
A pair of pivot shaft stays that rotatably supports both ends of the rear cover pivot shaft are attached so as to protrude from the side frame,
A long hole extending in the vertical direction is formed in the rotation shaft stay, and an end of the rear cover rotation shaft is loosely fitted in the long hole.

  According to a third aspect of the present invention, in the rotary working machine according to the second aspect, the rotating shaft stay is detachably attached to the side frame.

According to invention of Claim 1, the nail | claw axis | shaft which rotates in the advancing direction with the driving force from a motive power source, the several tilling nail extended in the radial direction of the nail | claw axis | shaft, and the rotary which covers a tilling nail from upper direction A cover, a left and right swinging portion having a swinging member that can swing in the width direction of the fuselage, attached to the approximate center of the rear end of the rotary cover, and a center part attached to the swinging member to move the aircraft forward and backward and the rear cover rotation shaft pivotable in a rotary working machine provided with a rear cover which is fixed to the rear cover rotary shaft, a swing member which is fixed to the rotation shaft of the right and left swinging portion comprises, a rear cover times a connecting plate for supporting a shaft is Ru is detachably fixed.

Therefore, the left / right swinging portion can be detached from the rotary cover, and the left / right swinging portion can be replaced. As a result, the service life of the entire rotary working machine is not shortened due to the consumption of the left and right rocking parts. Therefore, it is possible to provide a rotary working machine that is detachably provided with a left and right swinging portion that allows the rear cover to swing left and right.

  According to the second aspect of the present invention, the side frames are fixed on both sides of the rotary cover, and the pair of rotation shaft stays that rotatably support both ends of the rear cover rotation shaft are projected from the side frame. A long hole extending in the vertical direction is formed in the rotation shaft stay, and the end of the rear cover rotation shaft is loosely fitted in the long hole. As a result, the range in which the rear cover rotation shaft swings in the width direction of the machine body can be restricted. As a result, when there is an extremely large undulation, the rear cover can follow and prevent it from swinging greatly, and the rear cover can be prevented from being damaged by contact with other components. it can.

  According to the third aspect of the present invention, since the rotation shaft stay is detachably attached to the side frame, the rear cover rotation shaft can be swung in the width direction of the airframe without restricting the swing range. Can do.

It is a perspective view from the left rear of the rotary working machine of an example of this invention. It is the partially expanded view. (A), (b) is a figure for demonstrating attachment of a left-right rocking | swiveling part. (A) is a perspective view of a left-right swing part, (b) is a perspective view of a connection plate, (c) is a view for explaining attachment of the connection plate and a cylindrical part, and (d) is a perspective view of a rotation plate. FIG. 4E is a diagram for explaining a state in which the rotating portion is attached to the substrate. (A) is a figure which shows the state which made the rear cover rotating shaft loosely fit in the rotating shaft stay, (b) is a figure for demonstrating attachment of a rear cover rotating shaft and a side rib. It is a rear view for demonstrating a state which performs a tilling work using a rotary working machine, (a) is a figure which shows the state in which the rear cover was tilted to the right, (b) was a figure in which the rear cover was tilted to the left It is. It is a side view for demonstrating a state where tilling work is performed using a rotary working machine, (a) is a figure which shows the state in which the rear cover was tilted forward, (b) is a figure in which the rear cover was tilted behind. is there. It is a figure for demonstrating the attachment condition of the right side of the leveling leveler of the rotary working machine of this example, (a) is the assembled | attached figure, (b) is a figure of a rear cover single-piece | unit, (c) is a figure of the leveling leveler single-piece | unit. is there. It is a figure for demonstrating the attachment condition of the left side of the leveling leveler of the rotary working machine of this example, (a) is the assembled | attached figure, (b) is a figure of a rear cover single-piece | unit, (c) is a figure of the leveling leveler single-piece | unit. is there. It is a figure which shows a mode that the leveling leveler rotates according to undulations. It is a figure which shows the rotation connection part which connects the leveling leveler and the center part of a rear cover so that rotation is possible.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a rotary work machine 10 as an example of the present invention includes an input shaft 11 that receives a driving force from a tractor engine (power source), and the driving force of the input shaft 11 in an orthogonal direction (vehicle width). Direction), a transmission case 12 extending from the gear box GB on both sides in the vehicle width direction, a transmission shaft incorporated in the transmission case 12, and the like. Further, side plates (side frames) 30A and 30B are fixed to both ends of the transmission case 12, respectively. Further, the transmission case 13 is fixed to the side plate 30A. An upper end of the transmission case 13 is provided with one end of the aforementioned transmission shaft rotatably inserted therein, and a gear is fixed to the end of the transmission shaft. Another gear is provided in the lower part of the transmission case 13, and a chain is hung between the two gears. Reference numeral 13A denotes a transmission case cover for protecting the transmission case 13 from the road surface.

  One end of a claw shaft (not shown) is fixed to the center of the gear disposed in the lower part of the transmission case 13. The claw shaft extends over the entire region in the vehicle width direction, and a plurality of tilling claws (not shown) project from the claw shaft radially outward. Therefore, the driving force input from the input shaft 11 is transmitted to the transmission shaft through the gear box GB, and is transmitted from the transmission shaft to the claw shaft through the chain.

  Moreover, the rotary cover 16 is provided so that a tilling nail | claw may be covered from upper direction. The rotary cover 16 is for preventing the cultivation soil from jumping up, and is provided with a rear cover 17 attached to the rear end thereof so as to be rotatable in the vertical and horizontal directions. A leveling leveler (leveling plate) 18 is attached to the lower end of the rear cover 17 so as to be rotatable in the vertical direction.

  Note that both sides of the rotary cover 16 are fixed to the side plates 30A and 30B. A pair of reinforcing ribs 16A and 16A are fixed to the outer surface of the rotary cover 16 so as to extend in the traveling direction. An upper link member H1 is fixed to the gear box GB, and lower link members H2 and H3 are fixed to the transmission case 12 extending on both sides of the gear box GB, respectively. The upper link member H1 and the lower link members H2, H3 are for connecting to the rear part of the tractor.

  A pair of reinforcing ribs 21 and 21 are fixed to the outer surface of the rear cover 17 by welding in the vertical direction. A stay 22 is provided in the vicinity of the center of the reinforcing rib 21. A pair of stays 23 are fixed with bolts near the rear end of the rotary cover 16, and sub rods 24 and 24 are attached between the stays 22 and 22 of the rear cover 17, respectively. The upper end of the sub rod 24 is slidably attached to the stay 23 via a holding member 27. The holding member 27 is formed by bending a metal plate into a substantially gate shape when viewed from the side. The top surface is provided with a through-hole through which the sub rod 24 is slidable, and the fixing pin P1 is penetrated on both side surfaces. The through-hole is provided. A coil spring 25 is provided on the outer periphery of the upper end of the sub rod 24, and a snap pin for preventing the coil spring 25 from coming off is hooked on the upper end of the sub rod 24. The lower end of the coil spring 25 is in contact with the top surface of the holding member 27. On the other hand, the lower end of the sub rod 24 is fixed to the stay 22 so as to be rotatable. Reference numeral 28 denotes a side cover, and reference numeral 29 denotes a thread member for easily following the cultivation surface smoothly.

  As shown in FIG. 2, the center portion of the upper end of the rear cover 17 and the center portion of the rear end of the rotary cover 16 are connected by a left and right swinging portion 60. Further, a rear cover rotation shaft 61 is fixed to the left / right swinging portion 60. The rear cover rotation shaft 61 extends along the width direction of the fuselage on the back side of the upper end of the rear cover 17. Both end portions thereof are supported by the long holes 62LH of the rotary shaft stays 62 and 62, respectively. The rotating shaft stays 62 are fixed to the side plates 30A and 30B by bolts on the left and right sides, respectively. The long hole 62LH extends in the up-down direction (substantially vertical direction) in the rotation shaft stay 62 and is linearly formed.

  3 and 4 show the detailed mounting and detailed structure of the left and right rocking portion 60. FIG. The left / right swinging portion 60 is made of metal and includes a rotating portion 60A, a substrate 60C, a mounting plate 60B, and a rotating plate (swinging member) 60D. The rotation part 60A is configured by rotatably mounting a shaft-shaped rotation shaft 60AI on a cylindrical outer cylinder 60AO. A sliding bearing is formed by hydraulic fluid between the rotation shaft 60AI and the outer cylinder 60AO. The rotating portion 60A is fixed on the substrate 60C using the mounting plate 60B. Specifically, two mounting plates 60B and 60B cut out along the outer periphery of the outer cylinder 60AO are arranged at regular intervals in the longitudinal direction of the rotating portion 60A, and the lower ends of the mounting plates 60B and 60B are welded to the substrate 60C. Install by.

  The rotating plate 60D is formed with a through hole 60DX in the approximate center and two through holes 60DH on each side of the through hole 60DX. The rotation shaft 60AI is fitted into the through hole 60DX and fixed by welding or the like.

  A cylindrical portion 64 is provided on the outer periphery of the center portion of the rear cover rotation shaft 61. The cylindrical portion 64 is formed of a metal cylinder and supports the rear cover rotation shaft 61 so as to be rotatable. A sliding bearing is formed between the cylindrical portion 64 and the rear cover rotating shaft 61 with hydraulic oil. A connecting plate 64 </ b> A is fixed to the outer periphery of the cylindrical portion 64. The connecting plate 64A is formed with a notch 64AX in the approximate center and two through holes 64AH on each side of the notch 64AX. In addition, a bottom face 64AA formed obliquely at the lower end thereof is provided. The bottom surface 64AA is fixed to the outer periphery of the cylindrical portion 64 by welding or the like.

  Through holes are formed at the four corners of the substrate 60C, and this is combined with a through hole formed at the approximate center of the rear end of the rotary cover 16 so that the bolt BT1 can swing left and right through the substrate 60C. The part 60 is fixed to the rotary cover 16. Further, the through hole 60DH of the rotating plate 60D and the through hole 64AH of the connecting plate 64A are combined and tightened with the bolt BT2 (at this time, the tip of the rotating shaft 60AI is positioned at the notch 64AX). As a result, the left / right swinging portion 60 is fixed to the rear cover 17. As described above, the left and right swinging portion 60 is detachably attached to the rear cover rotating shaft 61 by the rotating plate (swinging member) 60D.

  3A, the rear cover rotation shaft 61 can rotate in the AB direction (that is, the forward / backward direction of the rotary working machine (machine body) 10) with respect to the cylindrical portion 64. is there. In addition, the rear cover rotation shaft 61 can also rotate in the CD direction (that is, in the vehicle width direction of the rotary working machine (machine body) 10) with respect to the axis of the rotation shaft 60 </ b> AI of the left / right swinging unit 60. . That is, the rear cover 17 can be rotated in the vertical direction (forward and backward direction) with respect to the rotary cover 16 and also in the horizontal direction (vehicle width direction).

The rotation range of the rear cover rotation shaft 61 in the left-right direction (vehicle width direction) is restricted by the rotation shaft stay 62. Pivot shaft stay 62, as shown in FIG. 5 (a), is formed by metallic plate, it comprises a long hole 62LH which are linearly formed in the vertical direction. The rotation shaft stays 62 and 62 are fixed to the side plates 30A and 30B by bolts, respectively. Therefore, the rotation shaft stay 62 can be detached from the side plates 30A and 30B.

  On the other hand, the end portions on both sides of the rear cover rotating shaft 61 are fixed to the upper ends of the side ribs 17A of the rear cover 17 as shown in FIG. The side rib 17A is formed of a metal plate, and has a through hole at its upper end. The end portion 61T of the rear cover rotating shaft 61 is penetrated by a predetermined amount through the through hole, and both are fixed by welding or the like. Then, the end 61T is inserted into the long hole 62LH. Note that the end portion 61T is movable up and down and rotatable in the long hole 62LH.

  In addition, since the left-right rocking | swiveling part 60 is attached to the rotary cover 16 with the volt | bolt BT1, replacement | exchange of each structural member (for example, rotating shaft 60AI etc.) is easy by removing volt | bolt BT1.

  An operation of performing a tilling work using the rotary working machine 10 configured as described above will be described with reference to FIGS. First, the rotary working machine 10 is connected to the tractor. Specifically, the PTO shaft of the tractor is connected to the input shaft 11 so that the driving force of the tractor engine can be transmitted to the rotary work machine 10. Further, the hitch provided at the rear portion of the tractor is connected to the upper link member H1 and the lower link members H2, H3.

  Then, the tractor engine is turned on and the tilling work is started. The tilling claw is rotated by the driving force from the input shaft 11 and tills the field. The cultivated soil that has become uneven is leveled by the leveling leveler 18 provided at the rear end of the rotary working machine 10. Here, at a location where the terrain undulates in the vehicle width direction of the aircraft (the vehicle width direction of the rotary work machine 10), as shown in FIGS. 6 (a) and 6 (b), the leveling leveler 18 is used to undulate the terrain. Try to follow. The rear cover 17 connected to the leveling leveler 18 swings to the left and right in the vehicle width direction in accordance with the left-right tilt of the leveling leveler 18 about the axis of the rotation shaft 60AI of the left-right swinging portion 60, and Enables leveling according to undulations. Note that the rotation angle of the rear cover 17 to the left and right is restricted to the range of the long hole 62LH of the rotation shaft stay 62 as described above.

  In addition, in a place where the terrain undulates in the longitudinal direction of the aircraft (the forward / backward direction of the rotary work machine 10), as shown in FIGS. 7A and 7B, the leveling leveler 18 follows the undulation of the terrain. And The rear cover 17 connected to the leveling leveler 18 via a bolt rotates around the rear cover rotation shaft 61 in the front-rear direction (vertical direction in rear view) in accordance with the vertical movement of the leveling leveler 18, and the landform of the field Enables leveling according to the undulations.

In addition, the attachment of the both sides of the rear cover 17 and the leveling leveler 18 may be as shown in FIGS. Arc-shaped long holes LH and round holes H1 are formed at the lower ends of the side ribs (guide plates) 17A and 17A on both sides of the rear cover 17, respectively. On the other hand, mounting ribs 181 and 181 are formed upright on both sides of the leveling leveler 18, respectively. Round holes H2 and H3 are formed in the mounting rib 181. Then, the round hole H3 of the mounting rib 181 and the round hole H1 of the side rib 17A are aligned, and the bolt BT2 is inserted and tightened with a nut. At this time, the mounting rib 181 and the side rib 17A are made rotatable with respect to the bolt BT2. Next, the round hole H2 of the mounting rib 181 and the long hole LH of the side rib 17A are aligned, and a bolt (bar-shaped member) BT1 is inserted and a nut is screwed. At this time, the mounting rib 181 and the side rib 17A are screwed so as to be rotatable with respect to the bolt BT1. Accordingly, the bolt BT1 is loosely fitted in the long hole LH. The bolt BT1 can be removed by loosening the nut.

  The side ribs 17 </ b> A may not be provided continuously from top to bottom along the side portion of the rear cover 17. For example, ribs for attaching the rotation support pins P <b> 2 may be provided on both upper sides of the rear cover 17, and other ribs for forming the long holes LH may be provided on both lower sides of the rear cover 17. Further, the bolt BT1 is not limited to this, and may be any rod-like member that is loosely fitted into the long hole LH.

  Reference numerals 18A and 18B denote extensions of the leveling leveler. The extension portions 18 </ b> A and 18 </ b> B are rotatably connected to the leveling leveler 18 via the rotation connecting portion 51. The extension portions 18A and 18B can be folded in the direction of the arrow (FIGS. 8A, 8C, 9A, and 9C) by hand, as necessary, as necessary. Can be expanded (foldable). In addition, both ends of the coil springs 52 and 52 are attached between the both ends of the leveling leveler 18 and the extension portions 18A and 18B, respectively, and the operation of closing the extension portions 18A and 18B is facilitated.

  Furthermore, a plurality of groove portions 18G are formed at the rear end of the leveling leveler 18, and the convex portions formed between the groove portions 18G function as leveling rakes, so that the cultivated soil can be made fine.

  As shown in FIG. 10, the leveling leveler 18 configured as described above can rotate within the range of the long hole LH formed in the side rib 17 </ b> A of the rear cover 17. Since the left and right end mounting ribs 181 and 181 of the leveling leveler 18 are disposed close to the left and right side ribs 17A and 17A, the leveling leveler 18 can be rotated vertically evenly without being biased in the vehicle width direction. can do.

When the leveling leveler 18 is rotated in the vertical direction by the above mechanism, the rotation connecting portion 41 is for more reliably supporting the rotation. As shown in FIG. 11, the rotation connecting portion 41 includes a rotation support rib 183, a rotation portion 18 5 , a fixing portion 171, and the like. The rotation support rib 183 is formed by fixing a pair of metal plate pieces to the leveling leveler 18 by welding at a predetermined interval. Before the end of the pivoting support rib 183 is provided with a through hole. On the other hand, the fixing portion 171 is made of a metal plate piece, and is fixed to the center rear end of the rear cover 17 with a bolt BT3. The rear end of the fixed portion 171 is fixed a pivot portion 18 5. Rotating portion 18 5 is made of a metal cylinder, it is fixed by welding the rear end of the fixing portion 171 on the outer periphery thereof. Then, the center of the rotation unit 18 5 together with the through hole of the rotation support rib 183 is attached and a pivot portion 18 5 and the rotation supporting rib 183 rotatably through a fixed pin PN. In this way, the leveling leveler 18 is attached to the rear cover 17 so as to be rotatable in the vertical direction at both ends and the center thereof. Reference numeral 184 denotes a handle (gripping part). The handle 184 is formed by bending a metal rod, and both ends thereof are fixed to the surface of the leveling leveler 18 by welding. The handle 184 is used when lifting the rear end of the leveling leveler 18 upward.

  The cultivated soil that has become uneven is leveled by the leveling leveler 18 provided at the rear end of the rotary working machine 10. At this time, the leveling leveler 18 rotates upward (forward direction) following the uplift of the agricultural field at the place where the topography is raised (convex land). At this time, since the bolt BT1 is loosely fitted in the long hole LH, the leveling leveler 18 rotates upward within the range of the long hole LH.

  Moreover, in the location where the topography is depressed (concave), the leveling leveler 18 follows the depression of the agricultural field and rotates downward (reverse direction). At this time, since the bolt BT1 is loosely fitted in the long hole LH, the leveling leveler 18 rotates downward within the range of the long hole LH. That is, the leveling level of the leveling leveler 18 is restricted by the long hole LH.

  The leveling leveler 18 can release the regulation of the rotation range by loosening the nut of the bolt BT1 and removing the bolt BT1 from the long hole LH. In this way, it is possible to operate following the terrain with a more steep slope.

  Further, the leveling leveler 18 may be fixed to the rear cover 17 by tightening the bolt BT1 firmly.

  In the above-described example, the bolt BT1 is loosely fitted in the long hole LH to restrict the rotation range of the leveling leveler 18, but the present invention is not limited to this, and instead of the bolt, a pin or the like May be loosely fitted in the long hole LH to restrict the rotation range of the leveling leveler 18.

10 Rotary working machine 16 Rotary cover 17 Rear cover 30A, 30B Side plate (side frame)
41 Rotating connecting portion 60 Left / right oscillating portion 61 Rear cover rotating shaft 60AI Rotating shaft 60D Rotating plate (oscillating member)
61T End 62 Rotating shaft stay 62LH Long hole

Claims (3)

A claw shaft that rotates in a traveling direction by a driving force from a power source;
A plurality of tilling claws extending in the radial direction of the claw shaft;
A rotary cover that covers the tillage nail from above;
A left and right swinging portion provided with a swinging member attached to substantially the center of the rear end of the rotary cover and swingable in the width direction of the airframe;
A rear cover rotation shaft that attaches a central portion to the rocking member and is rotatable in the forward / backward direction of the airframe;
In a rotary working machine comprising a rear cover fixed to the rear cover rotating shaft,
The right and left rocking part the swinging member which is fixed to the rotating shaft with the coupling plate and is characterized Rukoto is detachably fixed to supporting shaft said rear cover times, rotary working machine. Side frames are fixed on both sides of the rotary cover,
A pair of pivot shaft stays that rotatably supports both ends of the rear cover pivot shaft are attached so as to protrude from the side frame,
2. The rotary working machine according to claim 1, wherein a long hole extending in a vertical direction is formed in the rotation shaft stay, and an end of the rear cover rotation shaft is loosely fitted in the long hole.   The rotary working machine according to claim 2, wherein the rotary shaft stay is detachably attached to the side frame.

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