JP4494944B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter including a leveling device on the front side of a planting work machine.

A transplanter equipped with a leveling device on the front side of a planting work machine is known. Normally, in this type of transplanter, the leveling device is supported by the planting work machine via a lifting link mechanism so as to be raised and lowered, so that the vertical position of the leveling device relative to the planting work machine can be adjusted (for example, Patent Document 1).
Japanese Patent Laid-Open No. 2000-4604

  However, in the transplanter described in Patent Document 1, since the lifting link mechanism is disposed behind the rear wheel, in order to avoid contact between the rear wheel and the lifting link mechanism, the rear wheel and the planting work machine There is a problem that a large space is required between them and the length of the aircraft including the planting work machine becomes long.

SUMMARY OF THE INVENTION The present invention was created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is directed to a traveling machine body including front wheels and rear wheels, and a rear part of the traveling machine body. In the transplanting machine comprising: a planting work machine that is connected to be freely movable up and down; and a leveling device that is disposed between the rear wheel and the planting work machine in a side view and performs leveling by a rotary body, the shaft support of, supported vertically movably by the planting work machine via a parallel link mechanism, when adjusting the vertical position relative to the planting working machine of the leveling device, the shaft supporting the rear of the rear wheel The parallel link mechanism is provided with a pair of left and right support frames inclined in a front-rear and rear-lower direction, a rotation shaft rotatably supported between upper end portions of the support frame, and the rotation shaft. A pair of left and right upper links that extend forward from the left and right ends of the A pair of left and right lower links that extend forward from the lower side of the left and right support frames so as to be parallel to the upper link, and a front end portion that is positioned forward of the front end portion of the upper link is connected to the support of the leveling device; A pair of left and right vertical links interposed between the front end portion of the upper link and the middle portion of the lower link, and the upper and lower links, It is L-shaped with a pair of left and right auxiliary links interposed so as to be parallel to the lower link between the links and offset from the rear position of the rear wheel to the inside of the fuselage. It is a transplant machine. If configured in this way, the contact between the rear wheel and the lifting link mechanism can be avoided without securing a large space between the rear wheel and the planting work machine. Can be shortened.
The invention according to claim 2 is the transplanter according to claim 1, wherein the support frame of the parallel link mechanism is constituted by a seedling support stay that supports the seedling support of the planting work machine. .

  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 via a work machine connection mechanism 6 so as to be movable up and down. The planting work machine 7 includes a work machine frame 8 that is connected to the work machine connection mechanism 6 in a freely rolling manner, a seedling platform 9 provided in an inclined position above the work machine frame 8, and a plurality of plantings extending rearward from the work machine frame 8. Attached transmission case 10, a planting mechanism 11 provided at the rear end of each planting transmission case 10, a float 12 provided below the planting transmission case 10 so as to be swingable up and down, and the like.

  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 cope with the above problems, a leveling rotor (leveling device) 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 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 rotations integrally provided on the rotor shaft 17. A body (leveling plate) 18, a cover 19 that covers the rotating body 18, a pair of left and right shaft support portions 20 that rotatably support the rotor shaft 17, and a support 21 that extends upward from the shaft support portion 20. The ground leveling work is performed in front of the planting work machine 7 by rotating the rotating body 18 in a predetermined direction with the power input from the rear axle case 4.

  The shaft support portion 20 is disposed at a rear position of the rear wheel 3. This is because the rear wheel 3 that leaves the wheel marks and the shaft support 20 that does not exhibit the leveling function are positioned between the striations while avoiding the planting position (see the one-dot chain line in FIG. 3). The effect of filling the wheel marks can also be obtained by flowing muddy water backward from the gaps between the rotating bodies 18 formed by the above. Moreover, since the rotary body 18 can be arrange | positioned equally, the common use of the rotary body 18 which levels each stripe | line can be achieved.

  The front portion of the planting work machine 7 is integrally provided with a horizontal frame 22 fixed to the work machine frame 8 and a pair of left and right seedling support stays 23 extending upward from both ends thereof. The seedling stage stay 23 is for supporting the upper side of the seedling stage 9, but the seedling stage stay 23 of the present embodiment is also used as a support frame of the leveling rotor 14.

The leveling rotor 14 (the shaft support portion 20) is supported by a seedling stage stay 23 via an elevating link mechanism 24 so that the vertical position with respect to the planting work machine 7 can be adjusted. Lifting link mechanism 24, to distance from the rear wheel 3 as much as possible, and is configured in an L shape by a special parallel link mechanism including a plurality of parallel link elements.
Specifically, a rotating shaft 25 that is rotatably supported between the upper end portions of the left and right seedling support stays 23, and a pair of left and right upper links 26 that extend forward from the left and right ends of the rotating shaft 25. Once, extending from the lower side of the left and right seedling mounting base stay 23 so as to be parallel to the upper link 26 to the front, the ends before positioned in front of the front end of the upper link 26 as apparent from FIG. 2 a pair of left and right lower link 27 connected to support 21 of the ground leveling rotor 14, through so as to be parallel to the left and right seedling mounting base stay 23 between the intermediate portion of the front end portion and the lower link 27 of the upper link 26 A pair of left and right vertical links 28 provided and a pair of left and right positions located above the lower link 27 and interposed between the support 21 and the vertical link 28 of the leveling rotor 14 so as to be parallel to the lower link 27. The auxiliary link 29 is configured.

  At one end of the rotation shaft 25, a vertical position adjusting lever 30 extending forward is provided. The vertical position adjusting lever 30 rotates integrally with the rotation shaft 25 and is allowed to tilt left and right. When the vertical position adjusting lever 30 is turned up and down, the vertical position of the leveling rotor 14 is changed as the upper link 26 is turned up and down. A lever guide 31 that holds the position of the vertical position adjusting lever 30 is provided at the upper end of the seedling support stay 23. In the lever guide 31, a plurality of locking grooves 31a for locking the protrusions of the vertical position adjusting lever 30 are formed at predetermined intervals in the vertical direction. In other words, the vertical position adjustment lever 30 is pivoted up and down, and the vertical position of the leveling rotor 14 can be adjusted stepwise by locking it to an arbitrary locking groove 31a by tilting left and right. Become.

Next, the arrangement configuration of the elevating link mechanism 24 will be described. As shown in FIG. 3, the lifting link mechanism 24 is offset inward of the machine body with respect to the rear position of the rear wheel 3 as shown in FIG. 3, and is configured in a straight line shape in plan view. In this way, since the contact between the rear wheel 3 and the lifting link mechanism 24 can be avoided without securing a large space between the rear wheel 3 and the planting work machine 7, the planting work machine 7 is included. The aircraft length can be shortened. In the present embodiment, when the lifting link mechanism 24 is offset, a cylindrical spacer member 32 is interposed between the support 21 and the lifting link mechanism 24.

  Further, it is preferable that the lifting link mechanism 24 is offset from the rear position of the rear wheel 3 to the inside of the machine body and is along the seedling stage stay 23. In this way, even if the planting work machine 7 rolls relative to the traveling machine body 1, not only can the contact between the lifting link mechanism 24 and the rear wheel 3 be reliably avoided, but the lifting link mechanism 24 can be mounted on the seedling. A compact configuration along the base stay 23 is possible.

The riding rice transplanter according to the present embodiment 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 side view. And a ground leveling rotor 14 that is disposed between the rear wheel 3 and the planting work machine 7 and performs leveling by the rotating body 18, and the shaft support portion 20 of the rotating body 18 is connected via the lifting link mechanism 24. In order to adjust the vertical position of the leveling rotor 14 with respect to the planting work machine 7, the shaft support part 20 is arranged behind the rear wheel 3 while the lifting link mechanism 24 is provided. , it is offset inboard from the rear position of the rear wheel 3, since it is configured in a flat plane when viewed vertically straight line, without ensuring a large space between the rear wheel 3 and the planting working machine 7, the rear wheel 3 And the lifting link mechanism 24 can be avoided. As a result, the planting work machine 7 is included. Fuselage length can be shortened.

  In addition, the lifting link mechanism 24 is offset from the rear position of the rear wheel 3 to the inside of the machine body and is placed along the seedling stage stay 23 that supports the seedling stage 9, so that the planting work machine 7 is connected to the traveling machine body 1. Even when rolling, the contact between the elevating link mechanism 24 and the rear wheel 3 can be reliably avoided.

It is a side view of a riding rice transplanter. It is a rear part side view of a planting work machine. It is a principal part back surface expanded view which shows the support structure of a leveling rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Rear wheel 7 Planting work machine 9 Seedling stand 14 Leveling rotor 17 Rotor shaft 18 Rotating body 20 Shaft support 21 Support 23 Seedling stand stay 24 Lifting link mechanism

Claims (2)

A traveling machine body including a front wheel and a rear wheel, a planting work machine connected to the rear part of the traveling machine body so as to be movable up and down, and disposed between the rear wheel and the planting work machine in a side view, In a transplanter equipped with a leveling device that performs leveling, the shaft support portion of the rotating body is supported by the planting machine via a parallel link mechanism so as to be movable up and down, and the vertical position of the leveling device with respect to the planting machine For adjusting the shaft, the shaft support portion is disposed behind the rear wheel, and the parallel link mechanism is rotated between a pair of left and right support frames inclined front and rear and a top end portion of the support frame. A pivot shaft movably supported, a pair of left and right upper links extending forward from the left and right ends of the pivot shaft, and parallel to the upper link forward from the lower side of the left and right support frames. Extends and is located in front of the front end of the upper link A pair of left and right vertical links interposed between the front link of the upper link and the middle portion of the lower link between the pair of left and right lower links whose ends are connected to the support of the leveling device. L-shaped with a link and a pair of left and right auxiliary links that are positioned above the lower link and interposed between the support of the leveling device and the vertical link so as to be parallel to the lower link, A transplanter configured to be offset from the rear position of the rear wheel to the inside of the machine body . The transplanter according to claim 1, wherein the support frame of the parallel link mechanism is configured by a seedling stage stay that supports a seedling stage of the planting work machine.

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