JP6332349B2 - Walk-type field cultivator - Google Patents

Description

  The present invention relates to a tail wheel mounting device for a walking type tiller.

  In the walking type tiller, the rear end of the tiller upper cover that covers the top of the tilling nail is provided with a reverse trapezoidal shape rearing body and a rear tilling cover body that rotate in the front-rear direction around the horizontal axis, It is configured to be selectable between a tilling operation for connecting the rear tillage cover body and a tilling operation for releasing the connection between the cultivation body and the rear tillage cover body and rotating the rear tillage cover body upward to fix it. The thing is well-known (patent document 1).

JP 2012-115190 A

  An object of the present invention is to provide a walking type tiller capable of attaching a tail wheel suitable for moving work and tilling work.

  In order to solve such problems, the present invention has taken the following technical means.

The invention of claim 1
A walking type with an engine (E) and a fuel tank (2) on the front side of the fuselage, left and right traveling wheels (3) on the front and rear intermediate parts of the fuselage, and tilling claws (10) on the rear of the fuselage In the field cultivator
Cover the top of the tillage nail (10) with the tillage top cover (11),
At the rear end of the tiller upper cover (11), a tiller rear cover (B) that can be pivoted up and down around the horizontal axis is suspended and supported .
A resistance bar (13) is attached to the rear side of the left and right center part of the tiller upper cover (11) so as to be adjustable up and down,
A tail wheel support rod (31) having a tail wheel (32) attached to one end and a connecting portion (41) attached to the other end is provided,
The longitudinal portion of the tail wheel support rod (31) is inclined with respect to the connecting portion (41).
The tail wheel holder (35) is attached to the rear of the attachment position of the resistance rod (13),
A connecting portion (41) of the tail wheel support rod (31) is detachably attached to the lower portion of the tail wheel holder (35) or the resistance rod (13),
At the time of moving work, the connecting portion (41) of the tail wheel support rod (31) is attached to the lower portion of the resistance rod (13) so that the tail wheel support rod (31) is in a downwardly inclined posture.
At the time of tillage work, the connecting portion (41) of the tail wheel support rod (31) is attached to the tail wheel holder (33) so that the tail wheel support rod (31) is in a rearwardly inclined posture.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the connecting portion (41) is formed as a concave portion (41a) having a U-shaped cross section.

  The invention of claim 3 is the invention of claim 1 or 2, wherein the tilling rear cover (B) is flipped up and the connecting part (41) is arranged so that the tail wheel support rod (31) is in the rearward raising posture. By attaching to the lower part of the resistance rod (13), the tail wheel (32) comes into contact with the front surface of the tilling rear cover (B), and the tilling rear cover (21) is restricted from rotating downwardly. It is characterized in that it can be switched to the maintenance work posture of the nail (10).

  According to invention of Claim 1, a tail wheel (32) can be mounted | worn in an appropriate position according to the time of a plowing operation | work at the time of a movement of a walking type tiller. Further, at the time of moving work, the tail wheel support rod (31) is tilted rearward with the tail wheel (32) facing downward, the tail wheel (32) is installed, and the traveling wheel (2) and tail wheel ( It is possible to travel with the tilling claw (10) lifted in step 32).

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the connecting portion (41) of the tail wheel support rod (31) is also attached to the tail wheel holder (35) and the resistance rod (13). It can be easily detached from the side. That is, it becomes easy to replace the tail wheel (32) according to the time of the plowing work when the walking type tiller is moved.

  According to invention of Claim 3, it can make it easy to maintain a tilling nail | claw (10) from the back side of a body.

The side view of the walking type tiller in the state of tillage work. The rear view of the rear tillage cover and the cultivation board in the state of tillage work. The side view of the walk-type field cultivator of the cultivation work state. Rear view of rear tillage cover and cultivation plate in cultivation condition. The side view of the walking type tillage machine in a moving state. The rear view of the rear tillage cover and the cultivation board in the moving state. The perspective view of a tail wheel support rod.

  An overall configuration of a walking type tiller including the present invention will be described with reference to the drawings. Note that the front, rear, left and right in the description of the present embodiment are based on the advancing direction of the aircraft.

  An engine E and a fuel tank 2 are disposed on the front side of the body frame 1, left and right traveling wheels 3 and 3 are disposed on the front and rear intermediate portions of the body frame 1, and a tillage portion K is disposed on the rear portion of the traveling frame 1. doing. The tillage transmission case 4 is extended from the rear part of the body frame 1 in a downwardly inclined manner, and power is transmitted from the tillage transmission shaft (not shown) below the tillage transmission case 4 to the tillage part K. Further, the operation handle 5 is extended from the rear part of the machine body frame 1 in a rearwardly inclined manner, and a transmission lever 6 is provided on the operation handle 5 so as to shift the transmission of a transmission device (not shown) provided in the traveling machine body. I have to.

  The tilling part K has a well-known configuration in which a plurality of tilling claws 10 are provided on a tilling shaft that rotates about the horizontal axis, and a tilling upper cover 11 is provided so as to cover the rotation trajectory of the tilling claws 10. A resistance rod holder 14 is provided on the upper left and right middle upper portions of the tillage portion K so as to be positioned above the rear left and right center portions of the tillage upper cover 11, and the resistance rod 13 can be vertically slidably adjusted to the resistance rod holder 14. It is attached with.

  A tilling rear cover B is suspended and supported at the rear end of the tilling upper cover 11 so as to be pivotable up and down around the horizontal axis. This rear tilling cover B has a horizontally long rectangular shape in the rear view, with a culture plate 20 at the center of the left and right sides, left and right tillage covers 21 and 21 on both sides, and a connecting plate 22 that detachably connects the left and right tillage covers 21 and 21. Has been.

  The cultivating plate 20 has an inverted trapezoidal shape when viewed from the back, and the cultivating surface on the front side is constituted by a flat iron plate. The left and right tillage covers 21 and 21 are tilted toward the center toward the lower side in the rear view so that the upper side is narrower and the upper side is narrower, and the inverted trapezoidal space is formed in the center. . The cultivating plate 20 is disposed in the central space of the left and right tillage covers 21 and 21, and the culturing plate 20 and the left and right tillage covers 21 and 21 are overlapped with each other and bolted with the connecting plate 22 so that the oblong rectangle is viewed from the back. It is configured.

  The left and right side portions of the connecting plate 22 are welded to the lower ends of the left and right tillage covers 21 and 21, for example, so as to be integrally formed, the left and right central portions are passed through the rear side of the lower end portion of the cultivating plate 20, and The lower end of is detachably attached.

  In the case of normal tilling work, the cultivating plate 20 is attached to the left and right central portions of the connecting plate 22 and integrated with the left and right tilling covers 21 and 21. 20 is removed from the connecting plate 22, the left and right tillage covers 21, 21 are rotated upward, and fixed to the tillage cover fixing stay 14 a of the resistance bar holder 14 with the connecting pin 23. In addition, a large number of triangular tillers 24 are attached to the lower end side of the connecting plate 22.

  Parallelogram-shaped left and right side surface pressing plates 26, 26 are attached to the left and right side portions of the culture plate 20 via hinges 25, and are configured to rotate from the left and right front side portions of the culture plate 20 backward about the tilt axis. . When left and right elastic side plates 27, 27 are attached to the rear side surfaces of the left and right side pressing plates 26, 26, and the left and right elastic plates 27, 27 are rotated rearward, the rear ends of the left and right side pressing plates 26, 26 It is configured to deviate backward from the part. The bottom end portion of the center of the cultivating plate 20 is bent backward.

  When the left and right tillage covers 21 and 21 and the cultivating board 20 are not integrally connected, the left and right tillage covers 21 and 21 and the cultivating board 20 can be separately rotated in the front-rear direction around the rotation axis 30 of the left and right horizontal axis. It is configured. Further, when the left and right tillage covers 21 and 21 and the cultivating plate 20 are integrally connected, they are configured to rotate integrally. A pair of left and right rotating shafts 30 are provided, and the left and right ends of the cultivating plate 20 and the left and right tillage covers 21 and 21 are connected to each other.

  As shown in FIG. 7, a tail wheel 32 is attached to the lower end portion of the tail wheel support rod 31 that is configured in a straight line so as to rotate about the horizontal axis, and a connecting portion 41 is attached to the upper end portion. The connecting portion 41 includes a concave portion 41a and left and right connecting holes 41b and 41b for inserting connecting pins, and the connecting support surface 41c at the bottom of the concave portion 41a is inclined forward and upward with respect to the longitudinal direction of the tail wheel support rod 31. The connecting portion 41 is configured to be detachably attached to the lower side portion of the resistance rod 13 and a tail wheel holder 33 described later.

  A tilling frame 43 is provided along the front-rear direction on the left and right middle upper side of the tilling portion K, the rear side portion of the tilling frame 43 projects rearward from the tilling upper cover 11, and the cultivating plate 20, left and right tilling covers 21, 21 The resistance rod holder 14 is provided above the rear portion of the tilling upper cover 11 of the tillage frame 43, and the resistance rod 13 is inserted into the resistance rod holder 14 with the rear portion of the tilling upper cover 11 penetrating up and down. Pin connection is made possible.

  A tail wheel holder 33 is provided behind the resistance rod holder 14. The tail wheel holder 33 has a quadrangular cross section and a connecting hole 33a for inserting a connecting pin in the left-right direction. The connecting support surfaces 33b and 33b (in FIG. Show).

  1 and 2, with the tail wheel 32 facing upward, the recess 41a of the connecting portion 41 is fitted to the tail wheel holder 33 from above to join the connecting support surface 41c and the upper connecting support surface 33b. When the pin is connected, the tail wheel support rod 31 extends in a rear-upward inclination, and the tail wheel 32 is set at a position away from the cultivating plate 20 and the left and right tillage covers 21, 21. A plowing work state in which 32 does not collide is set.

  As shown in FIGS. 3 and 4, with the tail wheel 32 facing downward, the concave portion 41a of the connecting portion 41 is fitted to the tail wheel holder 33 from below to join the connecting support surface 41c and the lower connecting support surface 33b. When the pin is connected, the tail wheel support rod 31 extends rearward and tilts, and the tail wheel 32 faces the rear of the culture plate 20 and the left and right tillage covers 21 and 21 and enters a soil cultivation operation state that restricts the backward rotation. .

  Further, as shown in FIGS. 5 and 6, when the tail wheel 32 is directed downward and the recess 41 a of the connecting portion 41 is fitted to the lower end portion of the resistance rod 13 and pin-connected, the tail wheel support rod 31 is inclined downwardly. Extending, the tail wheel 32 faces the lower side of the cultivating board 20 and the left and right tillage covers 21, 21, and the left and right traveling wheels 3, 3 and the tail wheel 32 lift the tiller K.

  Next, normal tillage work will be described.

  At the time of tillage work, as shown in FIG. 1 and FIG. 2, the tillage cover 21 and the soil culturing plate 20 are integrally connected to a suspended state. That is, the left and right tillage covers 21 and 21 and the cultivating board 20 are connected to each other so as to rotate integrally around the rotation shaft 30 in the front-rear direction. At this time, the left and right side surface pressing plates 26 and 26 are at substantially the same position as the front side surface of the cultivating plate 20, and the left and right tillage covers 21 and 21 are in contact with the rear surface of the pressure plate 27 and the left and right side surface pressing plates 26 and 26. ing. Then, the operator slides the resistance rod 13 downward and sets it in a use state, and when the tail wheel 32 faces upward and the connecting portion 41 is fitted from above the tail wheel holder 33 and pin-connected, the tail wheel support rod 31 is moved. The tail wheel 32 extends in a rear-upward inclined shape toward the upper rear side, and the tail wheel 32 is set at an upper position away from the cultivating board 20 and the left and right tillage covers 21 and 21.

  When the operator starts the engine E, grasps the operation handle 5 and travels forward, the tip of the resistance bar 13 is buried in the soil, and the tilling claw 10 rotates and moves forward, and the tilling work is performed while regulating to a predetermined tilling depth. The farming scene is leveled by the tiller leveling body 24, and the appearance of the tilling work trace is improved.

  Next, soil cultivation work will be described.

  At the time of the soil cultivation work, as shown in FIG. 3 and FIG. The concave portion 41a of the connecting portion 41 is fitted and connected from below the tail wheel holder 33 with the tail wheel 32 facing downward, and the tail wheel support bar 31 extends downwardly and tilts, and the soil culturing plate 20 and the left and right tillage covers 21, 21 The tail wheel 32 is set opposite to the rear. Then, the left and right tillage covers 21, 21 are flipped upward through the left and right sides of the cultivating plate 20, tail wheel support rod 31, and tail wheel 32, and are connected to the tiller cover fixing stay 14 a of the resistance rod holder 14 by the connecting pin 23. Secure in the lifted state.

  In addition, the tilling cover fixing stay 14a is configured by extending upward from the rear side of the upper end of the resistance bar holder 14 and then by providing a pin hole in the bent portion that is bent rearward so that the left and right tillage covers 21 and 21 can be easily provided. To be able to support.

  When the operator starts the engine E and grips the operation handle 5 and travels forward, the cultivated soil cultivated by the cultivating claws 10 and jumped up rearward hits the front side of the cultivated soil plate 20, and the cultivated soil plate 20 is moved backward by the reaction force. If it rotates, the tail wheel 32 will contact | abut to the rear side surface of the mulching board 20, and the rotation to back is controlled. Then, the plow U is formed while the cultivated soil hitting the front side surface of the cultivating plate 20 scatters backward from the left and right sides of the cultivating plate 20.

  The left and right side face pressing plates 26, 26 in the horizontal posture along the left and right direction are rotated backward by the cultivated soil scattered on the left and right sides of the cultivating board 20, and the left and right side faces of the heel U are pressed to form the hook U. Further, the left and right elastic plates 27 and 27 are used to arrange the left and right sides of the formed ridge U. The left and right saddle side pressing plates 26 and 26 and the left and right elastic plates 27 and 27 form the saddle side surface while following the left and right side surfaces of the saddle U with their own weights by the action of the hinges 25 and 25.

  Further, as shown in FIG. 4, a reinforcing rib 20 a is formed on the middle plate 20 in the vertical direction so as to extend in the left-right direction, and is reinforced on the flat plate portion above the reinforcing rib 20 a of the medium plate 20. The wheels 32 are arranged opposite to each other so that the tail wheels 32 are prevented from coming into contact with the reinforcing ribs 20a to prevent the tail wheels 32 from being deformed.

  Further, as shown in FIG. 4, a wide portion in which the distal end sides of the left and right tillage covers 21 and 21 supported around the left and right horizontal axes are widened and the base end side is sequentially narrowed and then the vicinity of the pivotal portion is widened. 21a and 21a (shown in FIG. 4). Therefore, when the cultivating plate 20 and the left and right tillage covers 21 and 21 are integrally connected, the left and right upper portions of the cultivating plate 20 are connected in a closed state to prevent soil leakage during the culturing operation. The forward displacement of the left and right upper parts can be prevented.

  Further, when the road surface is moved by the cultivator, as shown in FIGS. 5 and 6, the connecting portion 41 is attached to the lower end portion of the resistance rod 13, and the tail wheel support rod 31 with the tail wheel 32 facing downward. The tail wheel 32 is made to protrude rearward and downward, and the traveling wheel 2, 2 and the tail wheel 32 lift the tiller part K to travel.

  Although not shown, when the cultivating plate 20 and the left and right tillage covers 21 are both connected together, the connecting portion 41 is attached to the lower end portion of the resistance bar 13 and the tail wheel 32 is directed upward, the tail wheel 32 is cultivated. It contacts the front surface of the plate 20 to prevent the cultivating plate 20 and the left and right tillage covers 21 from rotating downward, and the back surface of the tillage portion K is exposed. In this state, maintenance such as replacement of the tilling claw 10 can be performed.

  According to the said structure, the tail wheel 32 can be easily mounted | worn in an appropriate position according to the time of the movement of a walk type tillage machine, the time of a standing work, and the time of a tilling work. Further, the tail wheel support rod 31 can be made lighter by forming the light guide plate 20 and the left and right tillage covers 21 and 21 to be substantially the same length or shorter, making it easy to attach and detach, and the rear side portion of the fuselage. Can improve the balance between the front and rear of the cultivator.

  Further, the tail wheel holder 33 has a quadrangular cross section and is constituted by a connecting hole 33a for inserting a connecting pin in the left-right direction. The connecting portion 41 of the tail wheel support rod 31 is a recess 41a, a left and right connecting hole 41b for inserting a connecting pin, Since it comprises 41b and it was set as the structure connected with a pin, a connection operation | work becomes easy and the connection part 41 of the tail wheel support bar 31 can be easily attached or detached from the rear side to the resistance bar 13 of the state mounted to the tilling part K.

2 Fuel tank 3 Traveling wheel 10 Tillage claw 12 Tillage upper cover 13 Resistance rod 20 Baking plate 21 Left and right tillage cover 22 Connection plate 31 Tail wheel support rod 32 Tail wheel 35 Tail wheel holder 41 Connection part 41a Concave part 41c Connection support surface 43 Tillage frame B Tillage rear cover E Fuel tank

Claims (3)

A walking type with an engine (E) and a fuel tank (2) on the front side of the fuselage, left and right traveling wheels (3) on the front and rear intermediate parts of the fuselage, and tilling claws (10) on the rear of the fuselage In the field cultivator
Cover the top of the tillage nail (10) with the tillage top cover (11),
At the rear end of the tiller upper cover (11), a tiller rear cover (B) that can be pivoted up and down around the horizontal axis is suspended and supported .
A resistance bar (13) is attached to the rear side of the left and right center part of the tiller upper cover (11) so as to be adjustable up and down,
A tail wheel support rod (31) having a tail wheel (32) attached to one end and a connecting portion (41) attached to the other end is provided,
The longitudinal portion of the tail wheel support rod (31) is inclined with respect to the connecting portion (41).
The tail wheel holder (35) is attached to the rear of the attachment position of the resistance rod (13),
A connecting portion (41) of the tail wheel support rod (31) is detachably attached to the lower portion of the tail wheel holder (35) or the resistance rod (13),
At the time of moving work, the connecting portion (41) of the tail wheel support rod (31) is attached to the lower portion of the resistance rod (13) so that the tail wheel support rod (31) is in a downwardly inclined posture.
The walking type characterized by attaching the connecting portion (41) of the tail wheel support rod (31) to the tail wheel holder (33) so that the tail wheel support rod (31) is in a rear-upward inclined posture during the tilling work. Cultivator.   The walking type tiller according to claim 1, wherein the connecting portion (41) is a U-shaped concave portion (41a).   In the invention of claim 1 or claim 2, the tilling rear cover (B) is flipped up, and the connecting portion (41) is placed below the resistance rod (13) so that the tail wheel support rod (31) is in a rearward raising posture. The tail wheel (32) comes into contact with the front surface of the rear tilling cover (B) and the tilling rear cover (21) is restricted from rotating downward, thereby maintaining the tilling claw (10). A walk-type tiller configured to be switchable to a posture.

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