JPS6041067Y2 - Rice transplanter seedling stand - Google Patents

Description

[Detailed description of the invention] This invention is attached to the back of a seedling stand in a so-called multi-row rice transplanter that plants seedlings along multiple rows. By rotatably supporting the vertical feed shaft of the seedling mat vertical feed mechanism with a plurality of bearings, the vertical feed shaft is supported so as to be swingable relative to the bearing boss via the bearing bushing. , it simplifies the assembly work of the vertical feed shaft to the seedling platform, and even if the fulcrum of the vertical feed shaft is displaced due to distortion of the seedling platform, the rotation of the vertical feed shaft can be performed smoothly, and the The vertical feed amount of the seedling mat can be stably performed by rotating the vertical feed shaft.

Below, we will explain the drawings of an example in which the present invention is applied to a six-row riding rice transplanter. 2 and 3 are each formed in a hollow mission case, and the missions 5 and 6 are built into both, while the rear end of the front fuselage 2 and the front end of the rear fuselage 3 are connected horizontally via the vertical axis 7. Both the front and rear fuselage 2.
There are swing cases 8 and 8 on both left and right sides of 3, respectively.
Wheels 10, 10, 11, 11 are attached through wheels 9, 9, and the distance between the front wheels 10, 10 and the rear wheels 11, 11 is 4, The ratio is set so that the distance between the rear wheels is 2.

The output shaft (not shown) of the engine 12 attached to the rear end of the rear fuselage 3 is connected to the input shaft 13 of the rear mission case 6, and the output shaft 14 of the mission case 6 is connected to the transmission via the vertical shaft 7. Interlocked with the input shaft 15 of the case 5,
The output shaft 16 of the mission case 5 is connected to the front fuselage 2.
The PTO shaft 1 axis center 7 is connected via a clutch mechanism 18 for stopping the upper part of the PTO shaft 10, while the power is transmitted from the transmission cases 5 and 6 to both wheels 10, 10, 11, 11, respectively. and move the aircraft 1.

A bundle stand 19 is provided at the front of the upper surface of the front fuselage 2, and the bundle 20 provided thereon is connected to a steering mechanism 21 and a sprocket 22 attached concentrically to the vertical shaft 7 on the upper surface of the front end of the rear fuselage 3. The steering mechanism is configured such that power is transmitted through a chino 23, and steering is performed by adjusting the direction and degree of bending of both bodies 2 and 3 in the horizontal direction by rotating the bundle 20.

Reference numeral 24 denotes a seedling planting device located in front of the front body 2. The seedling planting device 24 is composed of three seedling planting units 25 arranged in parallel, and each seedling planting unit 25 is connected to a transmission case 26 and its tip. A pair of vertically swinging seedling planting claws 28 and 29 are attached to both ends of the pivoted claw shaft 27, and a link 30 with a bundle 29 whose middle part is rotatable with respect to the lower surface of the case 26, and the tip part is A float 33 is attached to the bumper 31 to be movable up and down via a non-bendable link 32.
, and a seedling stand 34, each transmission case 26 is equipped with a drive shaft 35 and an intermediate shaft 36, the rotation of the drive shaft 35 is transmitted to the intermediate shaft 36 by a chino 37, and the rotation of the drive shaft 35 is transmitted to the intermediate shaft 36 by a chino 37. A chain 40 is wound between the free rotating sprocket 38 and the free rotating sprocket 39 on the pawl shaft 27, and the intermediate shaft 36
On the top is a safety clutch mechanism 41 that automatically cuts off power transmission when the power transmitted to the claw shaft 27 exceeds a certain level.
As shown in FIG. 11, the pawl shaft 27 is provided with a clutch 43 with a sliding key 42 locked, and a spring 44 that urges the clutch 43 to always engage with the sprocket 39.
A pin 46 with a knob is provided in the case 26 and a flange 47 on the outer periphery of the half-split inner end clutch 43 is provided.
The clutch 4 is engaged with the pin 46 by 180 degree rotation.
3 is removed, and a recess 48 on the side surface of the collar 47 is fitted into a pin 46 to stop the seedling planting claws 28, 28 at the upper position.

A flange portion 50.51 is formed on both left and right side surfaces of the rear end of each transmission case 26, and both ends of the drive shaft 35 protrude outside the case from the center of the flange 50.51, and one end thereof is attached to the screw shaft 52. A cylindrical member 55.5 whose other end is formed as a circular shaft 53, and each seedling planting unit 25 is connected to a flange 50° 51 on the side surface of each transmission case 26 by a port 54.
6, and both ends of the hollow shafts 57 and 58 inserted into the cylindrical members 55 and 56 are removably joined to the screw shaft 52 and the circular shaft 53 of each drive shaft 35. Axis 3
5, 35, and 35 are connected in a line, and an input shaft 60 that transmits power to the drive shaft 35 via a pair of bevel gears 59 is pivotally supported at the rear end of the transmission case 26 of the seedling planting unit 25 located at the center.

Reference numeral 61 denotes a feeding mechanism for the seedling stand, whose case 62 is mounted between the flange 51 of the central transmission case 26 and the cylindrical member 56, and is connected to the cylinder from the drive shaft 35 via the chino 63 and the transmission mechanism 64. Transmission is transmitted to the camshaft 65, and the slidable horizontal feed shaft 66 is moved horizontally by the rotation of the camshaft 65 when a boat-shaped key 67 fixed thereto engages with a reciprocating spiral groove 68 of the camshaft 65. It is configured to be traversely fed, and to contact fixed cams 69, 69 on the camshaft at the right and left ends of the lateral feed to intermittently swing and rotate.

Further, on the transmission case 26 in each seedling planting unit 25, a long cross-sectional guide rail 70 is attached via a metal fitting 72 at a square portion 71 on the longitudinal side edge of the transmission case 26, and the transmission case 26 located on the outside 26.26 The flange portion 50.51 on the outer surface has an arm 74.7 with a trochanter 73 at the tip.
4 is installed.

Each seedling mounting table 34 in each of the seedling planting units is connected by U-shaped cross-sectional rails 75° 76 extending along the upper and lower sides of the back surface thereof, and the lower rail 75 is connected to the square portion 71 of the guide rail 70, and the upper rail 76 are fitted and engaged with the trochanter 73 at the ends of both arms 74, 74 so as to be movable in the lateral direction, and are detachably attached to the ends of the single-shaped fittings 77 at the ends of both arms 74, 74. The inserted pin 78 prevents removal (Fig. 7), and both ends of the horizontal feed shaft 66 are
The seedling table 34 is connected to the seedling table 34 through brackets 79 and 79 on the back side thereof.

A plurality of bearings 82 for pivotally supporting a plurality of vertical feed shafts 81 with a plurality of seedling mat feed wheels 80 are attached to the back surface of the seedling platform 34.

Each bearing 82 is constructed as shown in FIGS. 8, 9, and 10.

That is, the bearing boss portion 8 of the bearing 82 attached to the seedling stand 34
The inner surface of the bearing hole 82b in 2a is formed into a spherical shape in which both the left and right side surfaces of the bearing 82 have a large diameter.
A cylindrical bushing 82e having a diameter substantially equal to the minimum inner diameter of the spherical bearing hole 82b in the bearing boss portion 82a of each bearing 82 is rotatably fitted, and the bushing 82e is inserted into the spherical bearing hole 82b in the bearing boss portion 82a of each bearing 82. A vertical groove 82c extending in the axial direction is provided on the inner surface of the spherical bearing hole 82b in the bearing boss portion 82a of each bearing 82 so as to open on both left and right sides of the bearing. A protrusion 82d protruding from the outer periphery of the bush 82e is fitted into the vertical groove 82C at the minimum diameter portion of the bearing hole 82b.

The vertical feed shaft 81 connects a one-way clutch 83 attached thereto with a lever 84 fixed to the end of the horizontal feed shaft 66 via a connecting rod 85, and is rotated by the swinging rotation of the horizontal feed shaft 66. By swinging and rotating the direction clutch 83° 83, the seedling table 34 is configured to be intermittently fed and rotated in pitches at the left and right ends of the horizontal feed, and a part of the outer periphery of the feeding wheel 80 is rotated intermittently. protrudes from the surface of the seedling stand 34.

The seedling planting device 24 configured as described above also includes attachment pieces 86 and 86 fixed to the rear end of the cylindrical member 55 and 56.
The front fuselage is connected to a pair of left and right lower links 87, 87 connected to It is attached so that it can move up and down with respect to 2.
By rotating the lift arm 90 that engages with the lower link 87, the seedling planting device 24 is configured to be raised and lowered from the front body 2 side. Power is transmitted via a telescopic shaft 91 that connects the two.

A pipe bumper 31 is disposed in front of this seedling planting device 24, and branch pipes 92 protruding from the bumper 31 at each of 25 seedling planting units are connected to the tip of the transmission case 26, so that each seedling The planting units are connected to each other by the bumper 31,
Furthermore, side bumpers 9 are provided at both left and right ends of the seedling planting device 24.
3.93 is detachably connected to one end of the bumper 31 and the other end of the guide rail 70, respectively.

In this configuration, an operator sits on the seat 4 and the seedling planting device 2
4 is lowered until each of the floats 39 touch the field, and then the body 1 is moved forward and the seedling planting device 24 is driven, so that the seedling planting claws 28 in the seedling planting device 24 swing up and down in unison. On the other hand, since the seedling platform 34 is reciprocated in the left-right direction, the seedling mat on the seedling platform 34 is divided into individual plants by the seedling claws 28, and then planted in the field. At both the left and right ends of the horizontal feed of the seedling platform 34, the vertical feed shaft 8 on the back side of the seedling platform 34
1 rotates intermittently by -pitch, the seedling mat on the seedling platform 34 is sent by -pitch in the same direction as the traveling direction of the rice transplanter, that is, in the vertical direction.

When the vertical feed shaft for vertically feeding the seedling mat is supported by a plurality of bearings on a plurality of seedling stands arranged in parallel, the present invention provides a bearing in the bearing boss portion of each bearing. The inner surface of the hole is formed into a spherical shape with a large diameter on both the left and right sides of the bearing, while the vertical feed shaft has a cylindrical shape with an outer diameter approximately equal to the minimum inner diameter of the bearing hole in the bearing at each bearing location. The bushing is rotatably fitted into the bearing hole of the bearing, and the bushing is fitted into the bearing hole of the bearing so as to be swingable, and a vertical groove extending in the axial direction is formed on the inner surface of the spherical bearing hole of each of the bearings. It is provided with openings on both sides, and a projection protruding from the outer periphery of the bushing is fitted into the longitudinal groove and engaged at the position of the minimum diameter part of the bearing hole, and has the following functions and effects. play.

■ The inner surface of the bearing hole in each bearing attached to the seedling stand is formed into a spherical shape, and a cylindrical bushing fitted onto the vertical feed shaft is inserted into this so that it can swing freely, thereby reducing distortion in the seedling stand. Even if the axis of the bearing hole in each bearing is slightly inclined due to installation errors, the vertical feed shaft can be supported without twisting, so when installing the bearing on the seedling stand, it is possible to The effort required to adjust the axis of the bearing hole to be accurately aligned can be reduced.

■ When inserting the cylindrical bushing fitted onto the vertical feed shaft into the bearing hole in a non-rotatable manner, the inner surface of the bearing hole is formed into a spherical shape with a large diameter on both the left and right sides of the bearing. The vertical grooves provided on the inner surface of the bearing hole for non-rotatable engagement of the cylindrical bushing are opened on both left and right sides of the bearing. It is only necessary to insert the bearing from one side of the bearing, and there is no need to divide the bearing into two parts in a direction parallel to its axis. This simplifies the manufacturing of the bearing, and also makes it easier to insert the cylindrical bushing into the bearing. It is easy to assemble, and this combined with the reduction in the number of adjustments required when installing the bearing on the seedling stand in step ① above, makes assembly and disassembly of the vertical feed shaft to the seedling stand extremely simple. Can be done quickly.

■ The protrusion of the cylindrical bushing that fits into the longitudinal groove in the bearing hole of the bearing is located at the smallest diameter part of the bearing hole, so that the center of the cylindrical bushing when it swings in the bearing hole. Since this and the engagement position of the protrusion with the longitudinal groove coincide, no matter how much the cylindrical bushing swings relative to the axis of the bearing hole, the engagement state of the protrusion with the longitudinal groove will not come off. In addition, the protrusion is not inserted into the vertical groove.
It is possible to reduce resistance to the swinging motion of the cylindrical bushing within the bearing hole.

In other words, if the engagement of the protrusion with the vertical groove is offset from the center of the oscillating motion, the protrusion will move in and out of the longitudinal groove greatly during the oscillating motion of the cylindrical bushing, resulting in a large amount of oscillating motion. This creates resistance and increases the twisting of the vertical feed shaft, but if the engagement position of the protrusion into the vertical groove coincides with the center of the oscillating movement, the oscillating movement causes the protrusion to move into the vertical groove. Since there is little movement in and out of the bush, the resistance to the swinging movement of the bush is small, and the twisting of the vertical feed shaft can be reduced, and the rotation of the vertical feed shaft becomes smooth. The vertical feed amount becomes stable.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the rice transplanter, FIG. 2 is a plan view of FIG. 5 is a cross-sectional view of the seedling planting device, FIG. 6 is an enlarged sectional view VI-VI of FIG. 5, and FIG. 7 is a cross-sectional view taken from ■-■ of FIG. 5. 8 is a cross-sectional view of FIG. 6, and FIG. 9 is a cross-sectional view of IX-I in FIG. 8.
10 is a sectional view taken along the X-X plane of FIG.
FIG. 1 is a cross-sectional view of the seedling planting claw upper stop mechanism. 1... Airframe, 10... Front wheel, 11...
... Rear wheel, 24 ... Seedling planting device, 34 ...
...Seedling stand, 80...Feeding car, 81...
...Vertical feed shaft, 82...Bearing, 82a...
...Bearing boss, 82b...Bearing hole, 82e...
...Cylindrical bushing, 82c...Vertical groove, 8
2d... Protrusion.

Claims (1)

[Scope of utility model registration request] A seedling stand consisting of a plurality of seedling stands installed in parallel, each with a vertical feeding shaft for vertically feeding the seedling mat on each seedling stand, supported by a plurality of bearings attached to the back side of the seedling stand. The inner surface of the bearing hole in the bearing boss portion of each of the bearings is formed into a spherical shape with a large diameter on both left and right sides of the bearing, while the longitudinal feed shaft is formed with an outer diameter at each bearing location. A cylindrical bushing approximately equal to the minimum inner diameter of the bearing hole is rotatably fitted,
The bushing is fitted into the bearing hole in the bearing so as to be swingable, and the inner surface of the spherical bearing hole in each of the bearings is provided with a vertical groove extending in the axial direction so as to open on both left and right sides of the bearing. A seedling stand for a rice transplanter, in which a protrusion protruding from the outer periphery of the bush is fitted into the vertical load at a position of the smallest diameter part of the bearing hole.