JPH0829015B2 - Rice transplanter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power transmission device for a planting section of a rice transplanter.

[Prior Art] A planting part frame is provided in a planting part of a rice transplanter, and a seedling table and a transmission device for driving the planting device are provided in the frame. Rotational power of the engine is transmitted to a planting shaft provided in the planting section, and from there to a lead cam shaft for laterally moving the seedling stand and a planting device. The lead cam shaft is configured to be long in the left and right in relation to the movement amount of the seedling mounting table, and the rotational power is transmitted to one end of the lead cam shaft. Therefore, it is impossible to directly transmit from the planting shaft. For this reason, a counter shaft parallel to the lead cam shaft is provided, and the counter shaft is temporarily transmitted from the planting shaft and then transmitted from the end portion of the counter shaft to the end portion of the lead cam shaft.

[Problems to be Solved by the Invention] However, in the conventional device, power is transmitted from the planting shaft to the intermediate portion of the counter shaft by a chain or the like, and is transmitted from the end portion of the counter shaft to the lead cam shaft. Therefore, the length of the counter shaft was increased, and the weight was increased accordingly.

[Means for Solving Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the rice transplanter according to the present invention is configured such that the rotational power of the engine transmitted to the planting shaft of the planting section is transmitted to the lead cam shaft for laterally moving the seedling mounting table via the counter shaft. In the above, the transmission means from the planting shaft to the counter shaft is provided at a position deviated to either the left or right side of the machine body, and the counter shaft is arranged on the deviated side.

[Operation] Since the transmission means from the planting shaft to the counter shaft is provided at a position deviated to either the left or right side of the machine body, and the counter shaft is arranged on the deviated side, the counter shaft can be shortened. It is possible and can be made smaller and lighter.

[Examples] Examples described in the drawings will be described below.

The agricultural work machine shown in each of the following drawings is a two-row planting walk type rice transplanter 1, in which an engine 3 is arranged in the front part of a mission case 2 and a rotation projecting to the side of the mission case 2 is performed. Chain cases 6 and 6 are provided at the front ends of the housings 5 and 5 so as to be slightly rearward and upward, and traction wheels 7 and 7 that are grounding wheels that support the airframe are attached to the rear ends of the chain cases. From the rear part of the mission case 2, a center frame 9 having a rear end warped in an arch shape is extended rearward. A transmission case 10 that also serves as a frame of the planting work unit 1a is provided in the middle of the center frame 9, and the receiving case 12 of the seedling stand 11, the lateral movement device 13 of the seedling stand, and the transmission case 10 are provided in the transmission case. A planting device 14 is attached. A handle rod 15 having a U-shape in plan view is attached to the rear end of the center frame 9. The seedling stand 11 is a center frame 9
Support frame provided on the rail 16 and handle rod 15 provided at the rear of the vehicle
It is slidably supported in the left-right direction by 17, and at the lower part thereof, a vector conveyor type transfer device 18 for transferring the seedlings downward is provided. A float 22 having a rear portion rotatably supported by a support shaft 20 and a front portion supported by an expansion / contraction link 21 is provided on the lower side of these machines so that the height thereof can be adjusted.

The transmission case 10 is formed by connecting an upper housing 10a containing a drive part of the lateral movement device 13 and a lower housing 10b containing a drive part of the planting device 14 with a pair of left and right hollow connecting parts 10c and 10d. A central portion surrounded by the housing and the left and right connecting portions is formed as a space 26 penetrating forward and backward. A plurality of wire holders 27, ... Are arranged side by side on the upper surface of the lower housing 10b, and operation wires 28 ,. Since the operating lever provided on the handle rod 15 and the main body 72 of the hydraulic lifting device 71, which will be described later, are linearly connected by a wire, the number of guide fittings for guiding the wire is reduced as much as possible. be able to. In the illustrated example, the lower parts of the left and right connecting parts 10c and 10d are divided into an upper housing side and a lower housing side. For weight reduction, the upper housing side may be made of resin and the lower housing side may be made of aluminum alloy. Since the transmission case 10 is in the form of two boxes at the top and bottom, the weight reduction as described above can be easily performed.

A planting shaft 34, to which rotational power is transmitted from a transmission shaft 32 via bevel gears 30 and 31, is supported in the lower housing 10b. A fixed position stop clutch 35 is interposed between the planting shaft 34 and the bevel gear 31, and when the rotation of the transmission shaft 32 stops, the planting shaft 34 stops at a fixed position. Cranks 37 are attached to both left and right ends of the planting shaft 34, and a planting rod 40 is supported by the crank 37 and a link 38 attached to the lower housing 10b. The crank 37, the link 38 and the planting rod 40 constitute a link mechanism, and when the planting shaft 34 rotates, the planting claw 40a of the planting rod 40 is formed.
Draws a predetermined locus and moves up and down.

On the other hand, in the upper housing 10a, a lead cam shaft 43 is rotatably supported by bearings and has clockwise and counterclockwise spiral lead grooves 42, 42 'formed on the outer periphery thereof, and both end portions protruding outside the housing. Is fixed to both sides of the bottom of the seedling placing table 11, and a moving shaft 44 slidable in the axial direction is provided side by side. A lead metal 47, which is fitted to the lead cam shaft 43 and has a claw 46 that engages with the lead grooves 42 and 42 ', is attached to the center of the moving shaft 44. Further, below the upper housing 10a, the counter shaft 52 supported by the bearing portion 50 of the connecting portion 10c and the bearing protrusion 51 of the upper housing 10a.
Is provided. The counter shaft 52 is a chain stretched in the connecting portion 10c by sprocket wheels 54 and 55.
Rotational power of the planting shaft 34 is transmitted via 56, and is further transmitted to the lead cam shaft 43 via gears 58, 59. By changing the gear ratio between the gear 58 of the counter shaft and the gear 59 of the lead cam shaft, the transfer speed of the seedling mounting table 11 can be changed.

Further, a transmission mechanism 60 to the transfer device 18 on the seedling table 11 is provided on the side opposite to the side on which the counter shaft 52 is arranged. That is, this transmission mechanism 60 is provided with a driven cam shaft 62 which is an intermediate portion between the lead cam shaft 43 and the moving shaft 44 so as to be rotatable in the circumferential direction and movable in the axial direction, and the driven cam shaft 62 has a pair of driven cams 63. , 63 'are attached to the lead cam shaft 43, and a drive cam 64 engaging with the driven cams 63, 63' is attached to the lead cam shaft 43. The driven cams 63, 63 'are provided so as to be movable in the axial direction, and their moving ranges are regulated by the roll pins 66, 66', and are separated from each other by a spring 67 interposed therebetween. . The transfer device 18 is attached to the outer end of the driven cam shaft 62.
Arm 68 for actuating the
A fixed metal 69 is attached to the end of the.

When the lead cam shaft 43 rotates, the lead claw 46
The movement shaft 44 moves in the left-right direction because the movement shaft 44 moves along 42 (42 '). When the moving shaft 44 reaches the end portion of the left and right strokes, for example, when it reaches the right end of the left and right strokes as shown in FIG. 3, the fixed metal 69 pushes the driven cam shaft 62 to the right side. 63 and 63 are engaged with each other to rotate the driven cam shaft 62 once, and the transfer belt of the transfer device 19 is rotated and moved by one row of seedlings in the downward feeding direction. When the moving shaft 44 reaches the left end of the left and right stroke, the lead metal 47 moves the driven cam shaft.
62 is pushed to the left, so this time drive cam 64 and driven cam 63 '
And engage to rotate the transfer belt in a predetermined direction by a predetermined amount in the same manner as described above.

The transplanting machine 1 includes an elevating device 71 configured as follows. That is, a main body portion 72 having a hydraulic pump, a valve and the like is provided on the upper portion of the mission case 2, and a main cylinder 74 is fixedly provided on the back surface of the main body portion 72. A balance rod 75 is pivotally mounted on the rear end of the main cylinder so as to be swingable in a horizontal plane, and the left and right ends of the balance rod 75 are projected onto the upper surfaces of the rotary housings 5, 5 by connecting rods 76, 76. It is connected to the established arms 78, 78. Connection rod 7 above
Of the 6 (L, R), a sub-cylinder 79 is provided in the middle of the right-side connecting rod 76 (R).

The height of the field scene is detected by the detection rod 81 attached to the float 22 and the detection lever 82 connected to the detection rod 81, and the main cylinder 74 is expanded and contracted according to the detection result, so that the towing wheels 7 and 7 are moved relative to the aircraft. The planting work unit 1a is moved up and down to adjust the height. The pendulum 84, which is swingably supported in a plane perpendicular to the traveling direction, detects a tilt in the left-right direction of the machine body, and the sub-cylinder 79 is expanded and contracted according to the detection result, so that the left and right wheels 7, 7 The height of the aircraft is adjusted to correct the tilt of the aircraft. It should be noted that the balance rod 75 is configured as a rod that only moves back and forth without swinging in a horizontal plane, and either one of them, for example, only the wheels 7 on the side where the sub-cylinder 79 is provided is moved up and down to tilt the body horizontally. You may make it correct.

[Advantages of the Invention] As is clear from the above description, the rice transplanter according to the present invention is configured to be transmitted from the planting shaft to which the rotational power of the engine is input to the lead cam shaft via the counter shaft. Since the transmission position from the planting shaft to the counter shaft is provided at a position deviated to either the left or right side of the machine body, and the counter shaft is arranged on the deviated side, the transmission structure to the lead cam shaft is simple and The counter shaft can be shortened, making it possible to reduce size and weight.

[Brief description of drawings]

FIG. 1 is a side view of an example of the frame structure of the present invention, FIG. 2 is a plan view thereof, FIGS. 3 and 4 are rear cross-sectional views and side views of essential parts thereof, and FIGS. 5 and 6 are shown. FIG. 4 is a rear view and a side view of different main parts. DESCRIPTION OF SYMBOLS 1 ... Rice transplanter, 1a ... Working part for planting, 7 ... Traction wheel, 10 ... Frame for planting part, 11 ... Seedling table, 13 ... Transversing device, 14 ... Planting device, 22 ... Float, 26 ... Space, 28 ... wire.

Claims (1)

[Claims] 1. Rotational power of the engine transmitted to the planting shaft (34) of the planting section is transmitted to a lead cam shaft (43) for laterally moving the seedling mount via a counter shaft (52). The transmission means (56) from the planting shaft to the counter shaft is provided at a position deviated to either the left or right side of the machine body, and the counter shaft is arranged on the deviated side. Rice transplanter to do.