JP2012187065A - Rotation apparatus for extended leveling plate of agricultural working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation apparatus for an extended leveling plate of an agricultural working machine that has no risk of damage even if an interlocking arm is brought into contact with obstacles, etc., when the agricultural working machine is moved in a state in which the extended leveling plate is developed.SOLUTION: The rotation apparatus 40 for an extended leveling plate includes: a motor 43 for forward and reverse rotations that is arranged at the upper side of the plowing rotor of a soil puddling working machine 1; a power transmission mechanism part 47 that is connected to the revolving shaft of the motor and transmits the rotating power of the motor; the interlocking arm 53 that is connected to the output shaft of the power transmission mechanism part and is rotated together with the output shaft; and a connected body 60 that is connected to between the interlocking arm 53 and an extended leveling plate (left) 30L and rotates the extended leveling plate (left) 30L following the rotation of the interlocking arm 53. The interlocking arm 53 has an arm body part 56 and an arm support part 55 that is fixed on the base of the arm body part, is connected to the output shaft of the power transmission mechanism part 47 and is rotated together with the output shaft. The arm body part 56 has its base side rotatably connected to the arm support part 55 and is fixed on the arm support part 55 through a shear pin 57.

Description

  The present invention relates to an extended leveling plate rotating device of an agricultural machine that rotates an extended leveling plate capable of leveling the surface of a farm field flatly over a width wider than a tilling width of a tilling rotor between a retracted position and an unfolded position. .

  Such an extended leveling plate rotating device is provided in a tiller working machine as described in Patent Document 1, for example. This tillage working machine is attached to the rear part of the traveling machine body and proceeds along with the traveling of the traveling machine body to perform the shaving work. The tilling work machine is positioned behind the tilling rotor and is pivotally connected in the vertical direction. A leveling plate (second extension leveling plate in the literature) that leveles the cultivated soil cultivated by, and an extension that is rotatably supported around a spindle extending in the front-rear direction at the widthwise end of this leveling plate And a leveling plate (in the literature, an extended auxiliary leveling plate).

  The extended leveling plate rotating device is installed on a cover body (shield cover in the literature) that covers the top of the tilling rotor. The extended leveling plate rotating device is coupled to a motor capable of rotating forward and reverse on a pedestal attached to a cover body, a gear transmission mechanism connected to a rotation shaft of the motor, and an output shaft of the gear transmission mechanism. A rotating arm that rotates together with the output shaft, an interlocking arm that is pivotally connected to the shaft protruding from the shield cover facing the pedestal, and is connected to the rotating arm, an interlocking arm, and an extension leveling plate And a wire connected between the two.

  In this extended leveling plate rotating device, when the rotation shaft of the motor rotates in one direction, the power of the motor is transmitted to the rotating arm via the gear transmission mechanism, and the interlocking arm is rotated along with the rotation of the rotating arm. Rotate. As a result, the extended leveling plate moves from the retracted position to the deployed position or from the deployed position to the retracted position via the wire.

JP 2010-1224795 A

  In this conventional extended leveling plate rotating device, when the extended leveling plate is in the unfolded state, the interlocking arm moves to a position extending outward in the width direction of the tillage work machine. For this reason, with the extended leveling plate moved to the unfolded position, the tilling work machine is lifted and supported with respect to the traveling machine body so that the running machine turns or moves forward, or the width of the tilling work machine during the cultivation work. When the interlocking arm extending from the end of the direction is directly hooked on an obstacle, etc., and the extended leveling board is hooked on the obstacle, etc., a large load acts on the interlocking arm and the gear transmission mechanism connected thereto, There is a risk that they will be damaged.

  The present invention has been made in view of such problems, and the interlocking arm or the extension leveling plate is caught by an obstacle or the like during the movement of the farming machine or the plowing work with the extension leveling plate deployed. It is another object of the present invention to provide an extended leveling plate rotating device for agricultural machines that does not damage the interlocking arm and the gear transmission mechanism.

  In order to solve such a problem, the extended leveling plate rotating device of the agricultural working machine (practice working machine 1 in the embodiment) of the present invention has a cover portion (shield cover left 27L in the embodiment) that covers the top of the tilling rotor. , A shield cover right 27R), and a leveling plate (second leveling plate left 29L in the embodiment, the second leveling plate left 29L in the embodiment) that is disposed behind the cover portion so as to be pivotable in the vertical direction and cultivates the soil cultivated by the tilling rotor 2R leveling plate right 29R) and a support shaft (shaft portion 31 in the embodiment) extending in the front-rear direction at the end portion in the left-right direction with respect to the traveling direction of the leveling plate. An extended leveling plate rotating device for a farm working machine including an extended leveling plate (the extended leveling plate left 30L and the extended leveling plate right 30R in the embodiment), and a motor disposed above the cover portion of the farm working machine (Embodiment Forward / reverse rotation motor 43), a power transmission mechanism portion connected to the rotation shaft of the motor to transmit the rotational force of the motor, and connected to the output shaft of the power transmission mechanism portion to rotate together with the output shaft. The interlocking arm and a connecting body connected between the interlocking arm and the extended leveling plate and rotating the extended leveling plate as the interlocking arm rotates, the interlocking arm extending outward in the left-right direction of the leveling plate. It is provided with a connection release supporting means for releasing the connection with the power transmission mechanism portion and pivotally supporting the interlocking arm when pushed to the rear side in the traveling direction in the extended state. 1).

  The interlocking arm of the present invention includes an arm main body and an arm support that is fixed to the base of the arm main body and connected to the output shaft of the power transmission mechanism and rotates together with the output shaft. The connection release support means includes a shaft portion that rotatably supports the base side of the arm body portion on the arm support portion, and a shear pin that fixes the base side of the arm body portion to the arm support portion. It is characterized (claim 2).

  According to the extended leveling plate rotating device for an agricultural machine according to the present invention, when the interlocking arm is pushed rearward in the traveling direction in a state of extending outward in the left-right direction of the leveling plate, the connection with the power transmission mechanism unit is performed. By providing a connection release support means for releasing and supporting the interlocking arm in a rotatable manner, the interlocking arm is directly hooked to an obstacle or the like when the agricultural implement is moved or working with the extended leveling plate deployed. In addition, it is possible to provide an extended leveling plate rotating device for an agricultural machine that does not cause damage to the interlocking arm, the gear transmission mechanism, and the like even when the extended leveling plate is caught by an obstacle or the like.

The fragmentary top view of the substitute working machine for demonstrating the action | operation content of the extended leveling board rotation apparatus concerning one Embodiment of this invention is shown. It is a rear view of the shaving work machine in which this extended leveling board rotation apparatus was mounted. 1 shows a scribing work machine equipped with the extended leveling plate rotating device of the present invention, wherein FIG. 1 (a) is a side view of the scribing work machine, and FIG. 2 (b) is a partial plan view of the scribing work machine; FIG. 3C is a partial rear view of the scribing work machine. The partial top view of the scribing work machine for demonstrating the internal structure of an extended leveling board rotation apparatus is shown. The partial top view of the scribing work machine for demonstrating the internal structure of an extended leveling board rotation apparatus is shown. It is a figure for demonstrating the action | operation of an extended leveling board rotation apparatus, The figure (a) is a partial top view of a shaving work machine when an extension leveling board exists at the time of rotation, The figure (b) is extended. It is a partial rear view of the scribing work machine when the leveling plate is rotating. It is a figure for demonstrating the action | operation of an extended leveling board rotation apparatus, The figure (a) is a partial top view of the scribing work machine when an extended leveling board exists in an expansion | deployment position, The figure (b) is extended. It is a partial rear view of the scribing work machine when the leveling plate is in the unfolded position.

  Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. First, before explaining the extended leveling plate rotating device according to the present invention, an outline of a substitute working machine that is an example of an agricultural working machine equipped with the extended leveling plate rotating device will be described. In the present embodiment, an example in which the left and right work bodies are provided so as to be folded and unfolded on both sides of the work machine body will be described as an example of the substitute work machine.

  As shown in FIG. 2 (rear view) and FIG. 3 (a) (side view), the substitute working machine 1 is attached to the rear part of the traveling machine body 90 and proceeds with the forward traveling of the traveling machine body 90 to perform the writing work. A working machine main body 2 disposed at the center in the left-right direction with respect to the forward direction of the machine, and a left working body 20L and a right working body 20R attached to both left and right ends so as to be rotatable in the vertical direction. And has a three-part structure by the work implement body 2, the left work body 20L, and the right work body 20R.

  The work machine body 2 is connected to a front part of a machine body 5 having a main frame 3 extending in the left-right direction, and a three-point link coupling mechanism (not shown) provided at the rear part of the travel machine body 90 is connected to the rear part of the travel machine body 90. On the other hand, it is mounted so that it can be lifted. 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 transmission frame (chain case) 8 and a side frame 9 are suspended from the left and right ends of the main frame 3, and a number of tilling claws are attached between the transmission frame (chain case) 8 and the lower portion of the side frame 9. A tilling rotor is rotatably supported. A transmission mechanism is provided in the main frame 3, and this transmission mechanism is connected to the transmission mechanisms in the left working body 20L, the main working frame left 21L, and the main working frame right 21R provided on the upper part of the right working structure 20R, which will be described later. The power transmitted to the input shaft 6a is transmitted to the tilling rotor of the work machine body 2 and the tilling rotor 23 provided on the left work body 20L and the right work body 20R via these transmission mechanisms, and the work machine body 2 The tilling rotor 23, the left working body 20L, and the right working body 20R are configured to rotate the tilling rotor 23 provided in a predetermined direction.

  A shield cover 10 is provided between the transmission frame (chain case) 8 and the side frame 9 to cover the top of the tillage rotor. A first leveling plate 11 is attached to the rear end portion of the shield cover 10 so that the front end portion is rotatably attached in the vertical direction and the rear side extends obliquely downward. The rear end portion of the first leveling plate 11 cultivates the soil. The surface is leveled. A second leveling plate 12 is attached to the rear end portion of the first leveling plate 11 so as to be rotatable in the vertical direction, and the cultivated soil surface of the field is leveled by the second leveling plate 12.

  The left and right ends of the work implement body 2 are provided with shaft portions 14 extending in the front-rear direction at positions above the shield cover 10, and the left work body 20 </ b> L and the right work body 20 </ b> R rotate up and down around the shaft portion 14. It is provided freely. A hydraulic cylinder 15 is provided between the work machine main body 2 and the upper part of the left work body 20L and the right work body 20R. By extension and contraction of the hydraulic cylinder 15, the left work body 20L and the right work body 20R are located above the work machine main body 2. The left working body 20 </ b> L and the right working body 20 </ b> R move between the retracted position Pt where the left working body 20 </ b> L and the right working body 20 </ b> R are deployed to the side of the work machine body 2.

  The left working body 20L and the right working body 20R have a bilaterally symmetric structure. When the left working body 20L is described, a chain case left 25L is provided vertically on the outer end of the main frame left 21L extending in the left-right direction. A left side frame 26L is suspended from the inner end of the left 21L. A tilling rotor 23 is rotatably supported between the lower part of the chain case left 25L and the side frame left 26L, and a shield cover left 27L covering the upper part of the tilling rotor 23 is provided between the upper part of the chain case left 25L and the side frame left 26L. Is provided. A first leveling plate left 28L is attached to the rear end of the shield cover 27, and a second leveling plate left 29L is attached to the rear end of the first leveling plate left 28L so as to be rotatable in the vertical direction.

  The first leveling plate left 28L and the second leveling plate left 29L are joined and connected to the first leveling plate 11 and the second leveling plate 12 of the work machine body 2 when the left working body 20L is deployed, and the left working body At the time of 20L folding posture, the first leveling plate left 28L and the second leveling plate left 29L are separated from the outer end portion of the work machine body 2, and the joining with the first leveling plate 11 and the second leveling plate 12 is released. It is like that.

  An extended leveling plate left 30L is provided at the outer end of the second leveling plate left 29L so as to be rotatable in the vertical direction. This extended leveling plate left 30L rotates around a shaft portion 31 extending in the front-rear direction at the left and right outer ends of the second leveling plate left 29L, and is outside the second leveling plate left 29L when deployed. The second leveling plate left 29L is assisted in leveling work, and when folded (not in use), it is folded to the surface side of the second leveling plate left 29L and stored on the second leveling plate left 29L.

  This extended leveling plate left 30L is brought into a deployed state or a retracted state by the extended leveling plate rotating device 40 provided above the shield cover left 27L of the left working body 20L. As shown in FIG. 3A (side view), FIG. 3B (plan view), FIG. 3C (rear view), and FIG. The left work body 20L has a shield cover 27L attached to the left side of the left side 27L, a pedestal 41, a forward / reverse rotation motor 43 provided on the pedestal 41, and a rotation shaft of the forward / reverse rotation motor 43. Power transmission mechanism 47, interlocking arm 53 rotatably supported on shield cover left 27L facing base 41, and connecting body 60 connected between interlocking arm 53 and extended leveling plate left 30L. It has.

  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 leg portions 41b that bend and extend downward from both left and right sides of the flat portion 41a. The lower portion of the leg portion 41b is detachably attached to the shield cover left 27L via a bolt 42.

  The forward / reverse rotation motor 43 has a motor body 43a in which the rotation shaft of the motor rotates in the forward / reverse direction depending on the direction of the flowing current, and the motor body 43a transmits power to decelerate the rotation of the rotation shaft and increase the torque. A speed reduction mechanism 48 which is a part of the mechanism portion 47 is integrally attached.

  The forward / reverse rotation motor 43 is mounted on the flat surface portion 41a of the base 41 via a bracket (not shown). A remote operation switch is electrically connected to the forward / reverse rotation motor 43, and this switch is disposed near the driver's seat of the traveling machine body 90. By operating this switch, the forward / reverse rotation motor 43 can be driven and stopped.

  A worm gear is provided on the output shaft of the speed reduction mechanism 48, and a small gear (pinion) is meshed with the worm gear, and a large gear 50 having a larger diameter is meshed with the small gear. The speed reduction mechanism 48 and these worm gear, small gear, and large gear 50 constitute the power transmission mechanism 47 described above. The small gear and the large gear 50 are rotatably supported by the flat portion 41a. The gear ratio between the small gear and the large gear 50 is determined from the rotation speed of the forward / reverse rotation motor 43 and the rotation speed of the interlocking arm 53.

  As shown in FIGS. 3A and 5, a connecting member 51 is attached to the lower surface of the large gear 50 so as to be coaxially inserted into the rotation shaft of the large gear 50. The connecting member 51 has a flange portion 51a, and an arm support portion 55 constituting a part of the interlocking arm 53 is detachably fixed to the flange portion 51a via a bolt or the like.

  The arm support portion 55 has a cylindrical portion 55a disposed coaxially with the rotation shaft of the large gear 50 on one end side, and a plate-like support main body portion 55b extending outward in the other direction from the upper portion of the cylindrical portion 55a. Become.

  A support-side flange portion 55c connected to the flange portion 51a of the connecting member 51 is formed on one end side of the support main body portion 55b, and the connecting member is connected by a bolt or the like inserted between the flange portion 51a and the support-side flange portion 55c. An arm support portion 55 is detachably fixed to 51. For this reason, when the large gear 50 rotates, the arm main body portion 56 connected to the arm support portion 55 rotates in the same direction as the large gear 50 via the connecting member 51 and the arm support portion 55. In addition, the arm main body 56 has a direction in which the distal end side of the arm main body 56 extends inward in the left-right direction of the left working body 20L (see FIG. 1) and a direction in which it extends outward in the left-right direction (see FIG. 7A). ))).

  Inside the cylindrical portion 55a of the arm support portion 55, a shaft portion that protrudes from the shield cover left 27L and is disposed substantially coaxially with the rotation shaft of the large gear 50 is inserted, so that the arm support portion 55 is stable. Is supported by the rotation. The shaft portion may be provided on a plate member (not shown) that is provided between the leg portions 41b of the base 41 and faces the shield cover left 27L.

  The support main body portion 55b is formed in a rectangular shape in plan view (see FIG. 5), and a protruding piece 55d that bends upward and positions the arm main body portion 56 is formed at the right rear end portion thereof.

  The interlocking arm 53 includes the above-described arm support portion 55 and an arm main body portion 56 connected thereto. The arm main body 56 extends in a rod shape, the base side thereof extends linearly, and the distal end side is bent toward the extended leveling plate left 30L side. A connection support plate 55e is attached to the base of the arm body 56 by welding or the like. The connection support plate 55e extends so as to protrude from the base end portion of the arm main body portion 56, and an engagement plate 55f that is bent upward is provided at the rear end portion. The engagement plate 55f is disposed so as to be in contact with the protruding piece 55d of the arm support portion 55, and positions the arm main body portion 56 in the extending direction with respect to the arm support portion 55.

  A fulcrum bolt 58 that pivotally fixes the connection support plate 55e to the support main body portion 55b is inserted in the central portion of the connection support plate 55e. In addition, a through hole (not shown) through which the shear pin 57 is inserted is provided at the tip of the connection support plate 55e. The shear pin 57 inserted through the through-hole is inserted and fixed in a hole provided in the support main body 55b. As a result, the arm body 56 is fixed to the arm support 55.

  This shear pin 57 is sheared when an obstacle or the like comes into contact with the interlocking arm 53 when the extended leveling plate left 30L is deployed and the interlocking arm 53 extends outward from the left and right ends of the left working body 20L. It is comprised so that. For this reason, the shear strength of the shear pin 57 is set in accordance with the strength of the interlocking arm 53 and the power transmission mechanism 47, and the allowable strength that there is no risk of damaging them due to the load acting on the interlocking arm 53 and the power transmission mechanism 47. Is set to a maximum intensity or a lower intensity. The shear pin 57 and the fulcrum bolt 58 are collectively referred to as connection release support means 59 hereinafter.

  The connecting body 60 is made of a flexible wire that does not stretch. The connection body 60 is not limited to a wire, and may be a metal chain, a synthetic resin material string, or the like.

  The extended leveling plate rotating device 40 configured as described above has an extended leveling plate left 30L as shown in FIGS. 5, 6A, 6B, 7A, and 7B. When the forward / reverse rotation motor 43 is driven in a state in which is folded on the second leveling plate left 29L, the interlocking arm 53 rotates in the clockwise direction (arrow A direction), and the direction of the interlocking arm 53 is extended. The direction of the body 20 is changed from the direction extending inward in the left-right direction to the direction extending outward in the left-right direction, and the extended leveling plate left 30L is set in a deployed state (see FIGS. 7A and 7B).

  Accordingly, as shown in FIGS. 7A and 7B, the interlocking arm 53 is in a state of extending outward from the left and right end portions of the left working body 20L. In order to move the substitute work machine 1 to another position in this state, the traveling machine body 90 moves forward or travels while lifting and supporting the substitute work machine 1, and even during the substitute work, as described above, an obstacle or the like May contact the interlocking arm 53, or the extension leveling plate may contact an obstacle and the extension leveling plate may rotate upward, and the interlocking arm 53 may be pulled by force through the coupling body 60. The moving device 40 may be damaged.

  However, when an obstacle or the like comes into contact with the interlocking arm 53, or when the extension leveling plate contacts the obstacle and the extension leveling plate rotates upward, the interlocking arm 53 is forcibly pulled through the connecting body 60. As shown in FIG. 1, the shear pin 57 of the connection release support means 59 is broken, and the arm main body 56 is free from the arm support 55, and the arm main body 56 indicated by the two-dot chain line is disconnected. The support means 59 rotates around the fulcrum bolt 58 in the direction of travel. For this reason, it is possible to prevent a situation in which a large load acts on the arm main body 56 and the power transmission mechanism 47 of the extended leveling plate rotating device 40, and it is possible to prevent a situation in which they are damaged.

  In the above-described embodiment, the left working body 20L and the right working body 20R are exemplified as the substitute working machine 1 having a structure in which the left working body 20L and the right working body 20R can be folded with respect to the working machine main body 2. It is also possible to use a grabber working machine that is configured such that the extension leveling plate left 30L and the extension leveling plate right 30R are rotatably attached to the end of the work machine body 2 in the width direction.

  Further, as a connection release support means, when the tip or ball of the pin held via an elastic body instead of the shear pin 57 protrudes into the recess provided in the support main body 55b and the position of the arm main body 56 is fixed, an overload occurs. A connection release support means may be used in which the pin or the ball retreats from the concave portion against the elastic body and the arm main body portion 56 is free from the arm support portion 55.

  In the above-described embodiment, the extended leveling plate rotating device 40 is provided above the shield cover 27, but may be provided on the main frame 21. If it does in this way, the installation position of the extended leveling board rotation apparatus 40 becomes higher, and it can reduce a possibility that it may contact the obstacle with comparatively low height.

1st shaving machine (agricultural machine)
23 Tillage rotor 27L Shield cover left (cover part)
27R Shield cover right (cover part)
29L 2nd leveling board left (leveling board)
29R 2nd leveling board right (leveling board)
30L extension leveling board left (extension leveling board)
30R Extension leveling board right (extension leveling board)
31 Shaft (support shaft)
40 Extension leveling plate rotating device 43 Motor for forward / reverse rotation (motor)
47 Power transmission mechanism part 53 Interlocking arm 55 Arm support part 56 Arm body part 57 Shear pin 58 Support point bolt (shaft part)
59 Connection release support means 60 Linked body 90 Traveling machine body

Claims (2)

A cover portion that covers the top of the tilling rotor, a leveling plate that is disposed behind the cover portion so as to be pivotable in the vertical direction and cultivates the cultivated soil cultivated by the tilling rotor, and a traveling direction of the leveling plate An extension leveling plate rotating device of an agricultural working machine comprising an extended leveling plate supported rotatably about a support shaft extending in the front-rear direction at the end in the left-right direction,
A motor disposed above the cover portion of the agricultural machine;
A power transmission mechanism connected to the rotating shaft of the motor to transmit the rotational force of the motor;
An interlocking arm connected to the output shaft of the power transmission mechanism and rotating together with the output shaft;
A connection body connected between the interlocking arm and the extended leveling plate and rotating the extended leveling plate as the interlocking arm rotates;
When the interlocking arm is pushed rearward in the traveling direction while extending outward in the left-right direction of the ground leveling plate, the connection is released from the power transmission mechanism and supports the interlocking arm rotatably. An extended leveling plate rotating device for an agricultural working machine, comprising a release support means. The interlocking arm has an arm main body, and an arm support that is fixed to the base of the arm main body and connected to the output shaft of the power transmission mechanism and rotates together with the output shaft.
The connection release support means includes a shaft portion that rotatably supports the base side of the arm main body portion on the arm support portion, and a shear pin that fixes the base side of the arm main body portion to the arm support portion. The extended leveling plate rotating device for an agricultural machine according to claim 1, wherein:

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