JP2005095017A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a required space between rear wheels and a planting implement and suppress dispersion of ground operation accuracy or planting operation accuracy in a transplanter equipped with a ground implement on the front side of the planting implement. <P>SOLUTION: A riding type transplanter is equipped with a traveling machine body 1 provided with front wheels 2 and the rear wheels 3, the planting implement 7 connected to the rear of the traveling machine body 1 so as to be freely lifted and lowered and a land grading rotor 14 arranged between the rear wheels 3 and the planting implement 7 when viewed from the side and carrying out the land grading operation on the front side of the planting implement 7. The land grading rotor 14 is supported with the planting implement 7 through a parallel link mechanism L so as to be freely lifted and lowered. When the vertical position of the land grading rotor 14 relatively to the planting implement 7 is regulated, the link angle and link length of the parallel link mechanism L are set so that the land grading rotor 14 is lifted and lowered in the nearly vertical directions relatively to the planting implement 7 within the range of ground operation of the land grading rotor 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a transplanter provided with a ground work machine such as a scraping rotor on the front side of a planting work machine.

A transplanter equipped with a ground work machine such as a leveling rotor has been proposed on the front side of the work machine. Normally, in this type of transplanter, when installing a ground work machine on the front side of the planting work machine, the ground work machine is supported so that it can be raised and lowered, and the vertical position of the ground work machine relative to the planting work machine can be adjusted. (See Patent Documents 1 and 2.)
For example, in Patent Document 1, a ground working machine is supported by using a link mechanism so as to be lifted and lowered. In Patent Document 2, a ground work machine is supported by using a cylindrical guide so that the ground working machine can be lifted and lowered. The vertical position of the machine can be adjusted.
Japanese Patent No. 3098168 Japanese Unexamined Patent Publication No. 2000-3

However, in the ones shown in Patent Documents 1 and 2, since the front and rear displacement amount of the ground work machine accompanying the vertical position adjustment is large, a large space is required between the rear wheel and the planting work machine, and the planting work There is a problem that the aircraft length including the aircraft becomes long.
In addition, the ground work machines shown in Patent Documents 1 and 2 may vary in ground work precision and planting work precision because the front-to-back distance with respect to the planting work machine (float) changes as the vertical position is adjusted. There is.

The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems, and is connected to a traveling machine body including front and rear wheels and a rear part of the traveling machine body so as to be movable up and down. In the transplanting machine comprising: a planting work machine; and a ground work machine arranged between the rear wheel and the planting work machine in a side view and performing ground work on the front side of the planting work machine, the ground work In order to adjust the vertical position of the ground work machine relative to the planting work machine, in the ground action range of the ground work machine, The link angle and link length of the parallel link mechanism are set so that the ground work machine moves up and down in a substantially vertical direction with respect to the planting work machine.
In this way, the front and rear displacement amount of the ground work machine accompanying the vertical position adjustment can be reduced, so the required space between the rear wheel and the planting work machine is reduced, including the planting work machine. The aircraft length can be shortened.
In addition, even if the ground work machine is adjusted in the vertical position within the ground action range, the distance between the ground work machine and the planting work machine (float) is almost unchanged, so variations in ground work accuracy and planting work precision are suppressed. Can do.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, 1 is a traveling machine body of a riding rice transplanter, and the traveling machine body 1 includes an engine (not shown) mounted on the front part of the machine body, a transmission (not shown) for shifting engine power, and an output from the transmission. Front axle case (not shown) for transmitting the traveling power to the left and right front wheels 2, a rear axle case 4 for transmitting the traveling power output from the transmission to the left and right rear wheels 3, a driver seat 5 provided on the fuselage, etc. It is configured with.

  A planting work machine 7 is connected to the rear part of the traveling machine body 1 through a lifting link mechanism 6. The planting work machine 7 includes a work machine frame 8 facing in the left-right direction, a seedling stand 9 provided in an inclined posture above the work machine frame 8, a plurality of planting transmission cases 10 extending rearward from the work machine frame 8, and each planting The planting mechanism 11 is provided at the rear end of the transmission case 10, and the float 12 is provided below the planting transmission case 10 so as to be swingable up and down.

  The planting work machine 7 inputs planting power from the transmission via a plurality of transmission shafts 13, and by this power, performs a lateral feed operation of the seedling mounting table 9 and a seedling planting operation of the planting mechanism 11. The field where the planting operation is performed is previously flattened by the scraping operation, and the planting mechanism 7 is used for planting the seedling by the planting mechanism 11 while the float 12 slides there. The planting accuracy may be reduced due to the rough surface due to wheel marks, etc. In particular, the headland where the airframe is turned is a place where the roughness of the surface due to the wheel marks is remarkable, and the planting accuracy tends to decrease.

  In order to deal with the above problems, a leveling rotor (ground work machine) 14 is provided on the front side of the planting work machine 7. The leveling rotor 14 is disposed between the rear wheel 3 and the float 12 in a side view, and performs leveling work on the front side of the float 12. Thereby, the roughening of the surface by a wheel trace, etc. can be improved, and a planting precision can be raised, and especially the improvement effect is remarkable in a headland.

  The leveling rotor 14 includes an input case 16 for inputting power from the PTO shaft 4 a of the rear axle case 4 via the transmission shaft 15, a rotor shaft 17 extending left and right from the input case 16, and a plurality of rotor shafts 17. A leveling plate 18 and a cover 19 that covers the leveling plate 18 are provided. The transmission shaft 15 is connected to the PTO shaft 4a of the rear axle case 4 and the input shaft 16a of the input case 16 via a universal joint J so as to follow up and down of the leveling rotor 14 so that the transmission shaft 15 can expand and contract itself. It is configured.

  The transmission shaft 15 of the present embodiment has first to third shafts 15a to 15c fitted in a nested joint shape, and these shafts 15a to 15c are spline-coupled to each other. That is, since the transmission shaft 15 of the present embodiment employs a double spline structure, it is possible to ensure a longer expansion / contraction stroke than the transmission shaft of the single spline structure. Thereby, even when the distance between the PTO shaft 4a of the rear axle case 4 and the input shaft 16a of the input case 16 is short, the necessary lifting stroke of the leveling rotor 14 can be obtained.

  Next, the vertical position adjustment structure of the leveling rotor 14 with respect to the planting work machine 7 will be described. A front frame of the planting work machine 7 is integrally provided with a horizontal frame 20 fixed to the work machine frame 8 and a pair of left and right vertical frames 21 extending upward from both ends thereof. Between the upper ends of the left and right vertical frames 21, a rotation shaft 23 having upper arms 22 extending forward is provided at both ends so as to be freely rotatable. Further, below the left and right vertical frames 21 are respectively provided lower arms 24 that extend forward and are rotatable up and down.

  On the other hand, a pair of left and right stays 25 extending upward are integrally provided on the leveling rotor 14 side. The upper end side of each stay 25 is pivotally supported by the distal end portion of the upper arm 22, and the lower end side of each stay 25 is pivotally supported by the distal end portion of the lower arm 24. That is, the leveling rotor 14 is supported by the planting machine 7 so as to be movable up and down via the parallel link mechanism L constituted by the upper arm 22, the lower arm 24 and the stay 25.

  A vertical position adjustment lever 26 extending forward is provided at one end of the rotation shaft 23. The vertical position adjusting lever 26 rotates integrally with the rotation shaft 23 and is allowed to tilt left and right. When the vertical position adjusting lever 26 is rotated up and down, the vertical position of the leveling rotor 14 is changed as the upper arm 22 rotates up and down. A lever guide 27 that holds the position of the vertical position adjusting lever 26 is provided at the upper end of the vertical frame 21. In the lever guide 27, a plurality of locking grooves 27a for locking the locking pieces 26a of the vertical position adjusting lever 26 are formed at predetermined intervals in the vertical direction. In other words, the vertical position adjustment lever 26 is rotated up and down, and the vertical position of the leveling rotor 14 is adjusted stepwise by locking the locking piece 26a in an arbitrary locking groove 27a by tilting right and left. It becomes possible to do. A spring 28 is interposed between the upper end of the vertical frame 21 and the stay 25, and the operating load of the vertical position adjusting lever 26 is reduced by the urging force of the spring 28.

  Next, the link angle and link length setting of the parallel link mechanism L that supports the leveling rotor 14 will be described. As described above, when the leveling rotor 14 is provided on the front side of the planting work machine 7 via the parallel link mechanism L, the leveling rotor 14 is displaced in the front-rear direction along with the vertical position adjustment. This is because the leveling rotor 14 moves up and down in a circular arc along the tip rotation trajectory of the upper arm 22 and the lower arm 24. When the leveling rotor 14 is raised to the non-ground action range, since the leveling rotor 14 is retracted rearward and stored along the front surface of the planting work machine 7, the above trajectory is preferable. If the leveling rotor 14 is greatly displaced back and forth in the leveling action range, not only a large space is required between the rear wheel 3 and the float 12, but also the distance between the leveling rotor 14 relative to the float 12 changes. There is.

  In the present invention, in order to solve the above problem, as shown in FIGS. 3 and 4, the leveling rotor 14 moves up and down in a substantially vertical direction with respect to the planting work machine 7 in the ground action range of the leveling rotor 14. In addition, the link angle and the link length of the parallel link mechanism L are set. For example, in the present embodiment, the posture of the upper arm 22 in the ground action range (up and down angle with respect to the planting work machine 7) is tilted to a front and rear height, and the posture of the lower arm 24 (up and down angle with respect to the planting work machine 7). Are substantially parallel to each other, thereby causing a difference in the amount of longitudinal displacement of each arm 22, 24 accompanying the vertical movement of the stay 25. When the link angle is set in this manner, the longitudinal displacement of the leveling rotor 14 in the ground action range is canceled by the change in the longitudinal angle of the stay 25, and the leveling rotor 14 is moved up and down in a substantially vertical direction with respect to the planting work machine 7. Is possible. Of the movements of the leveling rotor 14 shown in FIGS. 3 and 4, the lower three are in the ground action range, and the movement shown on the upper side is in the non-ground action range (ascending and retracting position). .

  The riding rice transplanter configured as described above includes a traveling machine body 1 including a front wheel 2 and a rear wheel 3, a planting work machine 7 connected to a rear portion of the traveling machine body 1 so as to be movable up and down, and a rear wheel 3 in a side view. And a leveling rotor 14 that is disposed between the planting work machine 7 and performs leveling work on the front side of the planting work machine 7. The leveling rotor 14 is planted via the parallel link mechanism L. In order to adjust the vertical position of the leveling rotor 14 with respect to the planting work machine 7, the leveling rotor 14 is substantially perpendicular to the planting work machine 7 in the ground action range of the leveling rotor 14. Since the link angle and the link length of the parallel link mechanism L are set so as to move up and down in the direction, the longitudinal displacement amount of the leveling rotor 14 accompanying the vertical position adjustment can be reduced. As a result, a necessary space between the rear wheel 3 and the planting work machine 7 can be reduced, and the length of the machine body including the planting work machine 7 can be shortened.

  Moreover, even if the vertical position of the leveling rotor 14 is adjusted within the ground action range, the longitudinal distance of the leveling rotor 14 with respect to the float 12 hardly changes. Variations in work accuracy and planting work accuracy can be suppressed.

It is a side view of a riding rice transplanter. It is explanatory drawing which shows a motion of the leveling rotor accompanying the raising / lowering of a planting work machine. It is explanatory drawing which shows a motion of the leveling rotor accompanying a vertical position adjustment. It is a principal part expansion explanatory drawing same as the above. It is a principal part rear view which shows the support structure of a leveling rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Front wheel 3 Rear wheel 6 Elevating link mechanism 7 Planting work machine 12 Float 14 Leveling rotor 15 Transmission shaft 20 Horizontal frame 21 Vertical frame 22 Upper arm 23 Rotating shaft 24 Lower arm 25 Stay 26 Vertical position adjustment lever 27 Lever Guide 28 Spring L Parallel link mechanism

Claims (1)

A traveling machine body including a front wheel and a rear wheel, a planting machine connected to a rear portion of the traveling machine body so as to be movable up and down, and disposed between the rear wheel and the planting machine in a side view, and the planting In a transplanter equipped with a ground work machine that performs ground work on the front side of the work machine,
The ground work machine is supported by the planting work machine via a parallel link mechanism so as to be movable up and down, and the ground work range of the ground work machine is adjusted when adjusting the vertical position of the ground work machine with respect to the planting work machine. Then, the transplant machine which set the link angle and link length of the said parallel link mechanism so that the said ground work machine may raise / lower in the substantially perpendicular direction with respect to the said planting work machine.

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