JP2010124795A - Extended auxiliary leveling plate rotation device of agricultural work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expanded auxiliary landing plate rotation device of an agricultural work vehicle, capable of suppressing increase of cost when changing an synchronization arm damaged or the like. <P>SOLUTION: There is provided a puddling implement 1 having an extended auxiliary leveling plate set freely rotatably around a shaft extending longitudinally, at the end in machine width direction of a second extended leveling plate rotatably supported at the rear end of a first extended leveling plate 24 vertically freely rotatably supported on a shield cover 23 covering the upper part of a tilling rotor freely rotatably supported on a machine body 5, wherein, on the shield cover 23, a normal/reverse rotation motor 43, a gear transmission mechanism 47 attached on its axis and a turn arm 62 set at the lower part of a large gear 50 of the output side of the mechanism 47 are set to unitize, a projecting part 53a is set at the arm 53c of the turn arm 62, and an synchronized arm 53 having an insertion hole 62c to be inserted with the projecting part 53a to connect is freely rotatably attached on the shield cover 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an extension auxiliary leveling plate rotation device for an agricultural machine that rotates an extension auxiliary leveling plate capable of leveling the surface of a farm field flatly over a width wider than a tilling width of a tilling rotor.

  As described in Patent Document 1, a farming machine equipped with such an extended auxiliary leveling plate rotating device is provided with a tiller rotor rotatably on the machine frame and covers the upper part of the tiller rotor on the machine frame. A cover part is provided, arranged on the rear side of the tilling rotor in the direction of travel, a first leveling plate is rotatably provided at the rear end part of the cover part, and a second leveling board is rotated at the rear end part of the first leveling plate It is known that an extended auxiliary leveling plate can be rotated around a shaft portion extending in the front-rear direction at the end of the second leveling plate in the body width direction.

  The extension auxiliary leveling plate rotation device pivotally supports the interlocking arm on a bracket attached to the main frame extending in the body width direction, and connects the extension auxiliary leveling plate to the interlocking arm via the interlocking body. A forward / reverse rotation motor for rotating the interlocking arm is provided on the bracket, and a remote operation switch for controlling the motor is provided in the driver seat of the tractor.

  The interlocking arm is integrally formed with a gear body on the rotation center side, and the gear body is meshed with a pinion that meshes with a worm gear provided in the motor. For this reason, when the motor rotates, the gear body rotates via the worm gear and the pinion, and the interlocking arm rotates about the gear body side as the center of rotation to fold the extended auxiliary leveling plate above the second leveling plate. It can be rotated between the folding position and the unfolded position projecting laterally in the longitudinal direction of the second leveling plate.

Japanese Patent No. 2872530 (paragraphs 0009 to 0017, FIG. 2)

  In this conventional extended auxiliary leveling plate rotating device, if the extended auxiliary leveling plate is rotated to the folding position side while a large amount of mud is placed on the extended auxiliary leveling plate, an overload acts on the interlocking arm. As a result, the interlocking arm may be bent or damaged. In this case, it is uneconomic to replace the interlocking arm having an integrally formed gear body.

  This invention is made in view of such a background, and provides the extension auxiliary leveling board rotation apparatus of the agricultural machine which can suppress an increase in cost, when exchanging interlocking arms which damaged etc. With the goal.

  In order to solve such a problem, the present invention is provided with a tilling rotor that is rotatably supported by the fuselage, a cover that is provided on the fuselage and covers an upper portion of the tillage rotor, and a rear side in the traveling direction of the tillage rotor. A first leveling plate supported on the cover portion so as to be pivotable in the vertical direction, a second leveling plate pivotally supported on the rear end portion of the first leveling plate, and a body width of the second leveling plate Forward and reverse rotation motor provided in the cover portion and forward and reverse rotation in an agricultural working machine provided with an extended auxiliary leveling plate provided rotatably at the end portion in the direction about a shaft portion extending in the front-rear direction A gear transmission mechanism attached to the rotating shaft of the motor, an interlocking arm that is rotatably supported by the cover and that receives the rotational force from the gear transmission mechanism, and an interlocking arm and an extension auxiliary leveling plate. Agricultural work machine extended auxiliary leveling board having a connecting body connected in between A rotation arm provided on the rotation center axis of the output side gear of the gear transmission mechanism and extending to the outside in the radial direction of the rotation center axis to rotate together with the gear; One of the interlocking arms is provided with a protrusion that protrudes toward the other arm, and one of the rotating arm and the interlocking arm is provided with a connecting portion that is connected to the protrusion, and the interlocking arm is connected to the protrusion. In a state where the connecting portion is connected, it is rotated in conjunction with the rotation of the rotating arm, and the extended auxiliary leveling plate is folded above the second leveling plate and to the side in the longitudinal direction of the second leveling plate. Rotating between the extended deployment positions is a constituent requirement.

  The pivot arm is provided on the pivot center axis so as to project outward in the radial direction of the pivot center axis. Specifically, the pivot arm is provided in a direction orthogonal to the pivot center axis. Or provided in an oblique direction with respect to the rotation center axis, or a part of the rotation arm is provided in an orthogonal or oblique direction with respect to the rotation center axis. For this reason, the rotating arm is not limited to a linear shape, and may be a bent middle portion.

  The rotation arm attached to the rotation center shaft of the gear is formed by extending the rotation center shaft from the gear and attaching the rotation arm directly to the extended rotation shaft. Alternatively, an intermediate member such as a collar may be inserted into and fixed to the rotation center axis on the extended rotation center axis, and a rotation arm may be attached to the intermediate member.

  The projecting portion may be any member that can be connected to the connecting portion, and in addition to a member extending in a rod shape, a bifurcated portion that can be engaged with the arm portion of the interlocking arm or the rotating arm by splitting into the tip portion of the rod-like member. It may be provided, or a rod-like member provided with a locking part that can be fitted to the arm part of the interlocking arm or the rotating arm at the tip part. In addition, what has the forked part and the latching | locking part in the front-end | tip part can be used only when the rotation center axis | shaft of a rotation arm and an interlocking arm is coaxially arrange | positioned.

  The connecting portion is configured corresponding to the shape of the protruding portion. Specifically, when the protrusion is a rod-shaped member, it may be an insertion groove into which the protrusion can be inserted (claim 2). In this case, if the protruding portion is configured to protrude from the outlet side of the insertion groove while being inserted into the insertion groove (Claim 2), even if the vertical mounting positions of the rotating arm and the interlocking arm are changed. It is possible to connect the pivot arm and the interlocking arm with the protruding portion inserted into the insertion groove. The axial length of the projecting portion is determined from the distance between the predicted mounting position of the pivot arm and the interlocking arm in the vertical direction. The insertion groove may have an inner diameter that is substantially the same as the outer diameter of the protrusion when the pivot center axis of the pivot arm and the interlocking arm is coaxially arranged. If the axis is not coaxial, it may be difficult to move the pivot arm. For this reason, the inner diameter of the insertion groove is preferably formed larger than the outer diameter of the protrusion. The insertion groove may be a recess, a hole, a notch or the like.

  In addition, what the front-end | tip part of the protrusion part has a bifurcated part, and what provided the latching | locking part which can be fitted to the arm part of an interlocking arm may be used. Note that, in the protruding portion having a bifurcated portion or a locking portion at the distal end portion, the connecting portion is a connecting portion that is an arm portion of a rotating arm or an interlocking arm. In this case, the rotation center axis of the rotation arm and the interlocking arm needs to be coaxially arranged.

  If the rotation center axis of the rotation arm and the interlocking arm is not coaxially arranged, the rotation arm and the interlocking arm may not be able to rotate. Therefore, the insertion groove into which the protruding portion is inserted may be formed in a long hole shape extending in the arm longitudinal direction in any of the rotating arm and the interlocking arm provided with the groove (Claim 3). By making the insertion groove into a long hole shape, the interlocking arm can be rotated with the rotation of the rotation arm even if the rotation center axis of the rotation arm and the interlocking arm is not coaxially arranged. it can.

  When replacing the interlocking arm by unitizing the forward / reverse rotation motor and gear transmission mechanism and providing the interlocking arm separately from the unitized forward / reverse rotation motor and gear transmission mechanism (Claim 4) Therefore, it is not necessary to disassemble the motor for forward / reverse rotation that is unitized into a single unit, and it is possible to easily replace the interlocking arm.

  According to the extension auxiliary leveling plate rotating device for an agricultural machine according to the present invention, the rotation that projects radially outward of this shaft to the rotation center shaft of the gear on the output side of the gear transmission mechanism and rotates together with the gear. By providing an arm, providing either one of the rotating arm or the interlocking arm with a protruding portion that protrudes toward the other arm, and providing either of the rotating arm or the interlocking arm with a connecting portion that is connected to the protruding portion. Further, it is not necessary to form a gear body that meshes with the gear of the gear transmission mechanism in the interlock arm itself, the structure of the interlock arm can be simplified, and the cost of the interlock arm itself can be reduced. For this reason, even if an interlocking arm is damaged and it becomes necessary to replace the interlocking arm, it is possible to provide an extension auxiliary leveling plate rotating device for an agricultural machine that can suppress an increase in cost.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. First, before explaining the extended auxiliary leveling plate rotating device according to the present invention, a scraping work machine as an example of an agricultural working machine equipped with the extended auxiliary leveling plate rotating device will be described.

  As shown in FIG. 2 (plan view) and FIG. 3 (side view), the scraping work machine 1 has a work machine main body 2 disposed at the center in the left-right direction with respect to the forward direction of the machine, An extension work body 20 that is pivotably mounted in the vertical direction, and a shaft section 21 that extends in the front-rear direction is attached to the lateral outer end of the extension work body 20 so as to be pivotable in the vertical direction. An extension auxiliary leveling plate 30 is provided, and the work machine body 2 and the extension work bodies 20 and 20 form a three-part structure.

  The work machine main body 2 is connected to a front mast 5 having a main frame 3 extending in the left-right direction and a lower mast link to a top mast 4a connected to a three-point link connection mechanism (not shown) provided at the rear of the traveling machine body 90. A portion 4b is provided and is mounted on the rear portion of the traveling machine body 90 so as to be movable up and down. A gear box 6 having an input shaft 6a protruding forward is provided at the center in the left-right direction of the main frame 3, and power is input from the PTO shaft of the traveling machine body 90 through a power transmission means such as a universal joint to the input shaft 6a. To be communicated to.

  A chain transmission case 8 is suspended from the left end of the main frame 3 in the traveling direction, and a side frame 9 is suspended from the right end of the main frame 3 so as to face the chain transmission case 8. A transmission mechanism is provided in the left side of the main frame 3 connected to the chain transmission case 8 and in the chain transmission case 8, and a plurality of tilling claws are attached between the lower ends of the chain transmission case 8 and the side frame 9. A rotor 11 is rotatably provided. The power transmitted to the input shaft 6a is transmitted to the transmission mechanism in the main frame 3 and the chain transmission case 8 via the gear box 6 to rotate the tilling rotor 11 in a predetermined direction. The upper side of the tilling rotor 11 is covered with a shield cover 12, and side covers 13 are provided at both ends of the shield cover 12 in the left-right direction.

  A first leveling plate 15 is attached to the rear end portion of the shield cover 12 so that the front end portion is attached to be rotatable in the vertical direction and the rear side extends obliquely downward. The rear end portion 15a of the first leveling plate 15 is formed in a substantially straight shape in the left-right direction, and the rear end portion 15a flattens the surface of the cultivated soil. A second leveling plate 17 is attached to the rear end portion 15a of the first leveling plate 15 so as to be rotatable in the vertical direction. The 2nd leveling board 17 is formed in plate shape, and leveles the cultivated soil surface flat, the back surface contacting the surface of a farm field. At both left and right ends of the second leveling plate 17, extension working bodies 20 and 20 are provided that are rotatable about the shaft portion 18 as a rotation center.

  The extension working bodies 20 and 20 have a bilaterally symmetric structure. The tilling rotor 11 ′ rotatably supported between a pair of side plates 22 arranged on the left and right sides and a pair of side plates covering the top of the tilling rotor 11 ′. , A first extension leveling plate 24 disposed on the rear side of the tilling rotor 11 ′ in the traveling direction and supported by the shield cover 23 so as to be rotatable in the vertical direction, and a first extension. It has the 2nd extended leveling board 25 supported by the rear-end part of the leveling board 24 so that rotation was possible.

  The 1st extension leveling board 24 is comprised similarly to the 1st leveling board 15, and leveles the cultivated soil surface flatly by the rear-end part 24a of the 1st extension leveling board 24. FIG. The 2nd extension leveling board 25 is comprised similarly to the 2nd leveling board 17 mentioned above, and performs leveling work. The second extension leveling plate 25 is joined and connected to the outer end portion of the second leveling body 17 when the extension work body 20 is deployed, and the outer end of the second leveling body 17 when the second extension leveling plate 25 is folded. The joint with the second leveling body 17 is released away from the part.

  The extension auxiliary leveling plate 30 described above is provided at the outer end of the second extension leveling plate 25. The extension auxiliary leveling plate 30 rotates about the shaft portion 21 extending on the second extension leveling plate 25 as a rotation center, and extends to the outside of the second extension leveling plate 25 in the unfolded state. The ground leveling operation of the main plate 25 is assisted, and when folded (not in use), the ground plate 25 is folded to the surface side of the second extended leveling plate 25 and overlaps the second extended leveling plate 25.

  An extension auxiliary leveling plate rotating device 40 for rotating the extension auxiliary leveling plate 30 is provided on the shield cover 23 of the extension work body 20. As shown in FIG. 1 (partial sectional view) and FIG. 4 (plan view), the extension auxiliary leveling plate rotating device 40 includes a pedestal 41 attached on the shield cover 23 and a forward / reverse provided on the pedestal 41. A rotation motor 43; a gear transmission mechanism 47 attached to the rotation shaft of the forward / reverse rotation motor 43; an interlocking arm 53 rotatably supported on the shield cover 23 facing the base 41; It has the coupling body 57 connected between the extension auxiliary leveling boards 30.

  The pedestal 41 is formed by bending a sheet metal or the like, and includes a flat portion 41a to which a motor or the like is attached and a leg portion 41b that is bent downward from both sides in the width direction of the flat portion 41a and extends downward. The leg portion 41b is detachably mounted on the shield cover 23 with a bolt 41c. The forward / reverse rotation motor 43 has a motor main body 43a in which the rotation shaft of the motor rotates forward and backward by current supplied to the winding. The motor main body 43a decelerates the rotation of the rotation shaft and serves as an output shaft. A speed reduction mechanism 48 forming a part of the transmission gear transmission mechanism 47 is integrally attached.

  The forward / reverse rotation motor 43 is mounted on the flat surface portion 41a of the pedestal 41 via a bracket (not shown) so that the speed reduction mechanism 48 is disposed at the end in the width direction of the flat surface portion 41a. A switch 44 for remote operation is electrically connected to the forward / reverse rotation motor 43, and this switch 44 is disposed near the driver's seat of the traveling machine body 90 (see FIG. 2). Therefore, when the forward / reverse rotation motor 43 is driven by the operation of the switch 44, as will be described in detail later, the interlock arm 53 can be rotated to rotate the extended auxiliary leveling plate 30.

  The speed reduction mechanism 48 includes a worm gear (not shown) attached to the rotation shaft of the forward / reverse rotation motor 43 and a small gear (pinion) 49 that meshes with the worm gear. The small gear 49 is rotatably supported by the flat portion 41 a and meshes with a large gear 50 having a larger diameter than the small gear 49. The large gear 50 is rotatably supported on the rear side of the flat portion 41a. The attachment structure of the large gear 50 will be described later. That is, the gear transmission mechanism 47 is configured by the worm gear, the small gear 49, and the large gear 50. The gear ratio between the small gear 49 and the large gear 50 is set based on the rotation speed of the forward / reverse rotation motor 43 and the rotation speed of the interlocking arm 53.

  An annular support body 60 disposed coaxially with the rotation center axis of the large gear 50 is integrally attached to the lower surface of the large gear 50 by welding or the like. The support body 60 is rotatably inserted into a hole 41d provided in the flat portion 41a. An insertion hole 60a having a spline groove 60b formed on the inner surface is provided inside the support 60, and a transmission shaft 61 having a spline shaft 61a that can be fitted in the spline groove 60b is inserted into the insertion hole 60a. . For this reason, when the large gear 50 rotates, the transmission shaft 61 also rotates in the same direction as the large gear 50 via the support body 60.

  A rotating arm 62 is provided below the transmission shaft 61 so as to project in a direction perpendicular to the transmission shaft 61. The rotating arm 62 includes a cylindrical base portion 62a through which the transmission shaft 61 is inserted and an arm portion 62b projecting from the outer surface of the base portion 62a. The base 62 a is inserted below the transmission shaft 61 and is fixed to the transmission shaft 61 by a set screw 63. For this reason, when the transmission shaft 61 rotates, the rotation arm 62 also rotates in the same direction as the transmission shaft 61.

  The arm portion 62 b is bent toward the interlocking arm 53 side and extends along the interlocking arm 53. An insertion hole 62c is formed at the tip of the arm portion 62b. A protruding portion 53a protruding from the interlocking arm 53 is inserted into the insertion hole 62c. The length of the arm portion 62b is determined in consideration of the torque of the forward / reverse rotation motor 43, the magnitude of the load acting on the extended auxiliary leveling plate 30, and the like.

  As described above, the forward / reverse rotation motor 43, the gear transmission mechanism 47, and the rotation arm 62 are integrally attached to the base 41 to form a unit. The unitized forward / reverse rotation motor 43 and the like are covered with a cover 55 having a rectangular shape in plan view as shown in FIG.

  As shown in FIG. 1, the interlocking arm 53 includes a cylindrical rotating portion 53 b provided at an end portion and an arm portion 53 c that protrudes in a direction orthogonal to the side surface of the rotating portion 53 b. ing. The rotating portion 53b is rotatably inserted into the shaft portion 26 protruding from the shield cover 23 facing the flat surface portion 41a, and is rotatable about the shaft portion 26 as a rotation center. A protruding portion 53a projects from the upper portion of the rotating portion side of the arm portion 53c protruding from the rotating portion 53b. The shaft portion 26 is provided so that the rotation center axis thereof is located on the substantially same axis as the rotation center axis of the transmission shaft 61.

  The protrusion 53a is configured so that the outer diameter of the protrusion 53a is larger than the inner diameter of the insertion hole 62c so that the protrusion 53a can be easily inserted into the insertion hole 62c. The protruding portion 53a protrudes upward from the upper portion of the insertion hole 62c while being inserted into the insertion hole 62c. For this reason, when the extension auxiliary leveling plate rotating device 40 according to the present invention is attached to a scraping work machine of a different model, even if the vertical mounting positions of the rotating arm 62 and the interlocking arm 53 are changed, the protruding portion 53a. Can be inserted into the insertion hole 62c. The axial length of the protruding portion 53a is determined from the distance between the predicted mounting positions of the pivot arm 62 and the interlocking arm 53 in the vertical direction. In addition, by inserting the split pin 64 into the distal end portion of the projecting portion 53a projecting upward from the upper portion of the insertion hole 62c, the situation where the distal end portion of the rotating arm 62 is removed from the projecting portion 53a is prevented. can do.

  A bolt 65 is attached to the flat surface portion 41a of the base 41 so that the shaft portion 65a protrudes downward from the lower surface of the flat surface portion 41a. The projecting shaft portion 65a is in contact with the arm portion 62b of the rotating arm 62 to restrict the rotation of the rotating arm 62 in the counterclockwise direction, and is connected to the interlocking arm 53 via the connecting body 57. The situation where an unnecessary load acts on the extended auxiliary leveling plate 30 is prevented in advance.

  As shown in FIG. 4 (plan view), one end of a wire as a connecting body 57 is attached to the distal end of the interlocking arm 53, and the other end of the wire is attached to the front end of the extension auxiliary leveling plate 30. It has been.

  As described above, the interlock arm 53 is attached to the same shield cover 23 as the unitized forward / reverse rotation motor 43 and the like, but is provided separately from the unitized forward / reverse rotation motor 43 and the like. .

  When the extended auxiliary leveling plate rotating device 40 configured as described above is provided on the shield cover 23, as shown in FIGS. 1 and 4, the shaft arm 26 protruding from the shield cover 23 is attached to the interlock arm 53. The rotation part 53b is inserted, and the forward / reverse rotation motor 43, the large gear 50 of the gear transmission mechanism 47, and the rotation arm 62 are attached to the pedestal 41 to form a unit, and the unitized forward / reverse rotation motor 43 and the like are shielded. The cover 23 is attached to a predetermined position. At this time, the protruding portion 53 a provided in the interlocking arm 53 is inserted into the insertion hole 62 c provided in the rotating arm 62. And the coupling body 57 is connected between the front-end | tip part of the interlocking arm 53, and the extension auxiliary leveling board 30. FIG.

  On the other hand, when detaching the interlocking arm 53 from the shaft portion 26, the base 41 to which the unitized forward / reverse rotation motor 43 is attached is detached from the shield cover 23, and the split pin 64 is pulled out from the projecting portion 53a. The rotating arm 62 is removed from 53 a and the rotating portion 53 b of the interlocking arm 53 is removed from the shaft portion 26.

  Further, when performing the scraping operation with the extended auxiliary leveling plate 30 deployed, the extended working bodies 20 and 20 are set in the deployed posture in the field (see FIG. 2), and the switch 44 of the extended auxiliary leveling plate rotating device 40 is operated. Then, the forward / reverse rotation motor 43 is driven, the rotation arm 62 is rotated clockwise via the gear transmission mechanism 47 (see FIG. 4), and the interlocking arm 53 is rotated via the coupling body 57. The extended auxiliary leveling board 30 is set in the unfolded state.

  When the entire plowing work machine 1 is in the unfolded posture, the traveling machine body 90 equipped with the plowing work machine 1 is moved forward, and the cultivated soil in the field is cultivated by the cultivating rotors 11 and 11 ′. The field surface is leveled by 17. The cultivated soil surface on the axially outer side of the tilling rotors 11, 11 ′ is leveled by the extended auxiliary leveling plate 30.

  Thus, the interlocking arm 53 of the extension auxiliary leveling plate rotating device 40 of the present invention is connected to the gear transmission mechanism 47 via the rotating arm 62 and the protrusion 53a provided on the interlocking arm 53. The connection state with the gear transmission mechanism 47 can be released simply by removing the rotating arm 62 from the protrusion 53a. Further, since the interlocking arm 53 has a simple structure including the rotating portion 53b and the arm portion 53c, the cost of the interlocking arm 53 itself can be reduced. Therefore, even if the overload or the like acts on the interlocking arm 53 and the interlocking arm 53 is damaged, it can be easily replaced, and the extended auxiliary leveling plate rotating device 40 can suppress an increase in cost. Can be provided.

  In the above-described embodiment, the case where the unitized forward / reverse rotation motor 43 and the interlocking arm 53 are provided on the shield cover 23 has been described, but the attachment positions thereof are not limited thereto. For example, the unitized forward / reverse rotation motor 43 and the interlocking arm 53 are attached to the main frame 3, or the unitized forward / reverse rotation motor 43 and the like are attached to the main frame 3, and the interlocking arm 53 is attached to the shield cover 23. Or a unitized forward / reverse rotation motor 43 or the like may be attached to the side plate 22 at the outer end in the width direction of the extension work body 20, and the interlocking arm 53 may be attached to the shield cover 23.

  Further, in the above-described embodiment, as shown in FIG. 1, the rotation center axis of the rotation arm 62 and the interlocking arm 53 is arranged substantially coaxially. However, these rotation center axes are shifted. In this case, there is a possibility that the turning arm 62 and the interlocking arm 53 cannot be turned. Therefore, as shown in FIG. 6, the insertion hole 62c provided in the rotating arm 62 is formed in a long hole shape extending in the longitudinal direction of the rotating arm.

  In this way, when the rotating arm 62 shown by the solid line rotates counterclockwise (arrow A direction) with the transmission shaft 61 as the rotation center, the protruding portion 53a is relative to the transmission shaft 61 of the insertion hole 62c. After moving in the direction away from each other, it moves in the direction approaching the transmission shaft 61, and the interlocking arm 53 indicated by the solid line rotates to the position of the interlocking arm 53 indicated by the two-dot chain line. When the rotating arm 62 indicated by the two-dot chain line rotates clockwise (arrow B direction) with the transmission shaft 61 as the rotation center, it is the same as when the rotating arm 62 rotates counterclockwise. Then, after the protruding portion 53a moves in the direction away from the transmission shaft 61 of the insertion hole 62c, it moves in the direction approaching the transmission shaft 61, and the interlocking arm 53 indicated by a two-dot chain line indicates the interlocking arm indicated by a solid line. Rotate to position 53.

  For this reason, even if the rotation center axis line of the rotation arm 62 and the interlocking arm 53 is not arranged substantially coaxially, the interlocking arm 53 can be rotated with the rotation of the rotation arm 62.

  In the above-described embodiment, the scraping work machine 1 having a structure in which the extension work body 20 can be folded with respect to the work machine body 2 is taken as an example. However, the extension work body 20 is eliminated and the end of the work machine body 2 in the width direction is used. Alternatively, the auxiliary auxiliary leveling plate 30 may be pivotally attached to the part.

It is a partial cross-section rear view of the extension auxiliary leveling plate rotating device of the present invention mounted on the scraper working machine. It is a top view of the scraping work machine carrying the extension auxiliary leveling board rotation device of the present invention. It is a side view of the scraping work machine which carries the extension auxiliary leveling board rotation device of the present invention. The top view of the state which the inside of the extension auxiliary leveling board rotation apparatus of this invention mounted in the scratching work machine was exposed is shown. The top view of the extension auxiliary leveling board rotation apparatus of this invention mounted in the scratching work machine is shown. It is principal part explanatory drawing which shows other embodiment of the extension auxiliary leveling board rotation apparatus of this invention.

Explanation of symbols

1st scratching machine (agricultural machine)
5 Airframe 11 'Tillage rotor 21 Shaft part 23 Shield cover (cover part)
24 First extension leveling board (first leveling board)
25 Second extension leveling board (second leveling board)
30 Extension auxiliary leveling plate 40 Extension auxiliary leveling plate rotating device 43 Forward / reverse rotation motor 47 Gear transmission mechanism 50 Large gear (gear)
53 interlocking arm 53a protrusion 57 connecting body 62 rotating arm 62c insertion hole (connecting portion)

Claims (4)

A tilling rotor that is rotatably supported by the body, a cover part that is provided on the body and covers an upper part of the tilling rotor, and is arranged on the rear side in the advancing direction of the tilling rotor and is rotatable up and down on the cover part. The first leveling plate supported by the first leveling plate, the second leveling plate rotatably supported by the rear end portion of the first leveling plate, and the front end of the second leveling plate extending in the front-rear direction. Agricultural work machine including an extended auxiliary leveling plate provided rotatably about a shaft portion as a rotation center, and attached to a forward / reverse rotation motor provided on the cover portion and a rotation shaft of the forward / reverse rotation motor. Connected between the interlocking arm and the extension auxiliary leveling plate, the interlocking arm that is rotatably supported by the cover portion and rotates by receiving the rotational force from the gear transmission mechanism, Extended auxiliary leveling board for agricultural machines having a connected body A moving apparatus,
A rotation arm is provided on the rotation center axis of the gear on the output side of the gear transmission mechanism so as to project outward in the radial direction of the rotation center axis and rotate together with the gear.
One of the rotating arm and the interlocking arm is provided with a protruding portion that protrudes to the other arm side,
A connecting portion connected to the protruding portion is provided on the other of the rotating arm and the interlocking arm,
The interlocking arm rotates in conjunction with the rotation of the rotating arm in a state where the projecting portion and the connecting portion are connected, and the extension auxiliary leveling plate is folded above the second leveling plate. An extension auxiliary leveling plate rotating device for an agricultural working machine, wherein the rotation level is rotated between a position and a deployed position projecting laterally in the longitudinal direction of the second leveling plate. The connecting portion has an insertion groove into which the protruding portion can be inserted,
The extended auxiliary leveling plate rotating device for an agricultural machine according to claim 1, wherein the protruding portion protrudes from an outlet side of the insertion groove in a state of being inserted into the insertion groove.   The extension of the agricultural working machine according to claim 2, wherein the insertion groove is formed in an elongated hole shape extending in an arm longitudinal direction in either the rotating arm or the interlocking arm provided with the insertion groove. Auxiliary leveling plate rotating device. The forward / reverse rotation motor and the gear transmission mechanism are unitized,
The extension interlock for the agricultural machine according to any one of claims 1 to 3, wherein the interlocking arm is provided separately from the unitized motor for forward / reverse rotation and the gear transmission mechanism. Leveling plate rotating device.

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