JP2000078919A - Transmission structure for planting part in riding rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a planting driving case by providing a specific structure. SOLUTION: This transmission structure for a planting part in a riding rice transplanter is obtained by interlockingly connecting a transversely feeding screw 46 for reciprocating and transversely moving a seedling-carrying platform in the left and right directions and a vertically feeding cam shaft 51 for vertically feeding and driving a vertically feeding device installed in the seedling- carrying platform to a planting driving case 22, extending both the shafts to the same outer lateral side from the same lateral side of the planting driving case 22, arranging both the shafts therein and, on the other hand, installing a transversely feeding changeover mechanism for transmitting a powder inputted to the planting driving case 22 to a transversely feeding shaft 42 for driving the transversely feeding screw 46 on the side opposite to the one lateral side of the planting driving case 22 having both the shafts interlockingly connected thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting portion transmission structure in a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as one form of a transmission structure of a planting part in a riding rice transplanter, a lateral feed screw for reciprocally moving a seedling mounting table in a horizontal direction in a planting drive case, and a vertical arrangement provided in the seedling mounting table. There is a type in which a vertical feed cam shaft that drives the feed device in a vertical direction is provided, and a type in which a horizontal feed screw and a vertical feed cam shaft extend in opposite directions from a planting drive case. And
The planting drive case is provided with a transverse feed switching mechanism for transmitting the power input to the planting drive case to a transverse feed shaft for driving the transverse screw.

[0003]

However, in the former planting portion transmission structure described above, since the lateral feed screw and the vertical feed cam shaft are housed in the planting drive case, the planting drive case is large. In the latter case, the lateral transmission screw and the vertical feed cam shaft extend in the opposite directions from the planting drive case. Is difficult to assemble and work.

In addition, even when the lateral feed switching mechanism is disposed on either the left or right side of the planting drive case, the planting drive case becomes large because it is close to either the lateral feed screw or the vertical feed cam shaft. There is a defect.

[0005]

In view of the above, according to the present invention, a seedling mounting table provided with a plurality of seedling mounting portions is supported on a planting drive case so as to be able to reciprocate left and right at a constant stroke. A riding rice transplanter provided with a vertical feeding device that vertically feeds the placed seedlings by a predetermined amount at the stroke end of the table,
A lateral feed screw for reciprocating and laterally moving the seedling table in the horizontal direction and a vertical feed cam shaft for driving the vertical feeder provided on the seedling table are connected to the planting drive case in an interlocking manner. The screw and the vertical feed camshaft extend from the same side surface of the planting drive case to the same outer side and are arranged, while the lateral feed screw and the vertical feed camshaft are linked to one side of the planting drive case. Is provided on the opposite side with a traverse switching mechanism for transmitting the power input to the transplant drive case to a traverse shaft for driving the traverse screw. Is to be provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In FIGS. 1 and 2, (A) is a riding rice transplanter, which is planted behind a self-propelled traveling unit (B). Section (C) is connected via a lifting mechanism (D).

The traveling section (B) has an engine (2) mounted on the front upper portion of an upper frame (1) positioned in the longitudinal direction of the fuselage, and a steering shaft (3) mounted on the rear of the engine (2).
And the steering wheel (3-1) is mounted on the upper part. (4) is a hood covering the upper parts of the engine (2) and the fuel tank (4-1).

A transmission case is provided below the engine (2).
(5), and a front axle case (6) is provided on each of the left and right sides of the transmission case (5), and front wheels (7) are mounted on it via the front axle (7-1). The rear axle case (8) is located behind the fuselage, and rear wheels (9) are mounted on the left and right sides of the rear axle case (8). A lower frame (10) is connected to the front axle case (6) and the rear axle case (8) in a bridging manner, and is located below the upper frame (1).

The rear axle case (8) is connected to the transmission case (5) via a propeller shaft (19) while being connected to the left and right rear ends of the lower frame (10). (20) is a rear axle protruding on both sides of the rear axle case.

Reference numeral (21) denotes a planting drive shaft for interlockingly connecting the transmission case (5) of the traveling part (B) of the rice transplanter and the planting drive case (22) of the planting part (C). And such planting drive shaft
In (21), the front drive shaft (21-1) and the rear drive shaft (21-2) are interlockingly connected via a universal joint (21-3).

The rear drive shaft (21-2) is connected to the outer tube shaft (21-4).
The inner tube shaft (21-5) is spline-fitted so as to be extendable and contractable, and the inner tube shaft (21-5) is interlocked to the planting drive case (22).

Therefore, even when the planting section (C) moves up and down, the rear drive shaft (21-2) rotates up and down around the universal joint (21-3). It moves and expands and contracts,
The power transmission function from the transmission case (5) of the traveling section (B) to the planting drive case (22) of the planting section (C) can be ensured.

[0013] (11) is a pipe-shaped rear frame formed in a raised shape in side view while connecting the rear end to the upper portion of the rear axle case (8). The rear fender (12) and the driver's seat are arranged at the upper position. (13) is installed. And the rear frame
The front side of (11) is the left and right rear end of the upper frame (1) (1-
1) and are connected integrally in a T-shape, the left and right front ends of the rear frame (11) are at the intermediate position (10-1) of the lower frame (10), and the They are integrally connected at a middle position while intersecting in a T-shape.

An engine pulley (14) is connected to an input pulley (15) of a transmission case (5) by winding a V-belt (16) around the engine pulley. (17) is a wide-width step-and-casing body positioned on the upper surface of the upper frame (1), the rear side of which is integrally connected to the rear fender (12), as well as a floor surface, a transmission guide plate and the like. It is made of a synthetic resin having high rigidity such as FRP so as to be also used.

Reference numeral (18) denotes a shift lever, which is located near the steering shaft (3). A lifting link mechanism (23) is provided with a link support bracket (24) at the rear position of the rear frame (11) and pivotally connects the bases of a pair of left and right lift arms (25). (26) pivots the base (26-1) in the middle of the lower frame (10), and the tip of the lift arm (25)
This is an elevating cylinder mounted between the upper support shaft (27).
(28) is an upper link of the lifting link mechanism (23), the front end of which is connected to the upper support shaft (27) of the lift arm (25), and the rear end of which is mounted on the upper part of the planting frame (29). It is pivoted to (30).

A lower link (31) has a front end pivotally connected to a link support bracket (24) while a rear end has a planting frame (2).
It is pivotally supported on a connecting support shaft (32) which is mounted on the lower part of 9).

The upper link (28) and the lower link (3
1) and lift arm (25) and planting frame (29)
Constitute a parallel link.

The planting section (C) is provided with a plurality of seedling mounting sections on a seedling mounting table (33) disposed above the planting frame (29), and the seedlings are mounted on each seedling mounting section. Then, place each seedling on the planting drive case (2
2) The planting is carried out in the field by operating a planting mechanism (34) provided at the rear.

The seedling mounting table (33) is provided with a planting drive case 22.
A vertical feeder (which feeds the seedlings vertically by a predetermined amount at the end of the stroke of the seedling mounting table (33)).
(Not shown). (35) is a planting drive case (22)
A drive bevel gear (36) is fixed to the rear end of an input shaft provided in the front-rear direction of the vehicle. Reference numeral (37) denotes a planting main shaft provided in the planting drive case (22) in the lateral direction, and a driven bevel gear (38) is fixed at the center so as to be freely meshable with the drive bevel gear (36). (39) is a planted spindle sprocket that is supported on the left side of the planted spindle (37), and the planted spindle (37) is rotatable on both left and right sides by ball bearings (40-1) and (40-2). It is supported by. The right end of the planting spindle (37) projects outside the planting drive case (22),
(41) is installed.

Reference numeral (42) denotes a transverse feed shaft positioned parallel to the planting main shaft (37), and a transverse feed driven gear (43) is mounted at the right end.

The traverse drive gear (41) and the traverse driven gear (43) are housed in a traverse switching gear case (44) provided on the right side (a) of the planting drive case (22). Thus, a transverse feed switching mechanism (44a) is formed.

The lateral feed shaft (42) is rotatably supported on both left and right sides by ball bearings (45-1) and (45-2).

On the left side of the lateral feed shaft (42), a lateral feed screw (46) is arranged so as to protrude outward from the left side wall of the planting drive case (22), and is connected. A longitudinal feed drive gear (47) is supported at the center of the shaft (42).
On the outer peripheral surface of (46), a frame receiving member for lateral movement (not shown)
A reciprocating spiral groove (46a) for slidably fitting the seedling mounting table (33) is formed so that the seedling table (33) can be reciprocated in the left-right direction.

Reference numeral (48) denotes a vertical feed shaft positioned parallel to the horizontal feed shaft (42), and a right-hand driven driven gear (49) meshing with the vertical feed drive gear (47) is supported on the right side. are doing.

On the right side of the vertical feed shaft (48), a vertical feed device for driving the vertical feed device provided on the seedling mounting table (33) through the coupling joints (50-1) (50-2) is driven vertically. The feed cam shaft (51) is arranged and connected so as to protrude outward from the left side wall of the planting drive case (22).

Further, the end of the vertical feed cam shaft (51) extending to one side in front of the front is located near the outer end on one side of the planting range in the left-right direction. Also, (52) is integrally protruded from the vertical feed cam shaft (51),
An operating member that drives the vertical feed device vertically (not shown)
The vertical feed cam (52) intermittently acts on the operation member each time the seedling mounting table (33) is positioned at the left and right moving ends. ing. And the left end of the vertical feed cam shaft (51) is a ball bearing
It is rotatably supported by (53-1). Vertical feed shaft (48)
Are rotatably supported by ball bearings (52-1) and (52-2).

Here, the horizontal feed screw (46) and the vertical feed cam shaft (51) are connected at the left (b) position of the planting drive case (22).

A planting drive sprocket (54) is rotatably supported at the rear of the planting drive case (22), and is connected to the planting main shaft sprocket (39) via an endless chain (55). Linked and linked.

(56) is a connection joint provided on the inner diameter of the planting drive sprocket (54), and connects the planting transmission shafts (57) and (57) on both left and right sides.

As described above, since the planting transmission shafts (57) and (57) are connected to the planting drive case (22) via the connecting joint (56), the planting mechanism (34) is planted. It can be easily attached to and detached from the drive case (22). Further, (58) is a bevel gear mounted on the end side of the plantation transmission shaft (57), and (59) is a bevel gear that meshes with the bevel gear (58), which is perpendicular to the plantation transmission shaft (57). The arm is mounted on the front end of a planting arm drive shaft (60) located in the rear direction of the vehicle. (61) is a bevel gear attached to the rear end of the planting arm drive shaft (60), and (62) is a planter located at right angles to the planting arm drive shaft (60) and in the lateral direction of the machine body. Bevel gear that meshes with the bevel gear (61) in the center on the arm shaft with
(63) is installed. The bevel gear transmission mechanisms (64-1) and (64-2) are provided before and after the planting arm drive shaft (60).

Further, crank arms (65) and (65) are connected to the left and right sides of the planting arm shaft (62), respectively.
5) (65) is connected to a planting arm (67) having a planting claw (66) at the front end.

Reference numeral (68) denotes a driven arm fulcrum shaft located at the rear upper portion of the planting arm shaft (62), and the driven arm (69) is positioned to be swingable on both sides. (70) is an arm mounting shaft connecting the rear end of the planting arm (67) and the front end of the driven arm (69). The planting drive shaft (57) connected to the left and right sides of the planting drive case (22) is connected to the connecting pipe (7) as shown in FIG.
Covered in 1).

In (72), the axis is oriented in the front-rear direction.
Bevel gear transmission while covering the planted arm drive shaft (60)
(64-1) A drive shaft case for connecting and supporting (64-2). (73)
Is a planting arm shaft case that covers the planting arm shaft (62) with its axis oriented in the left-right direction. The planting arm shaft case is provided so as to be substantially perpendicular to the rear part of the drive shaft case (72).

Then, the connecting pipe (71) and the drive shaft case (7
2) and the planting arm shaft case (73) each have a circular pipe shape.

In this way, the connecting pipe (71) covering the shafts (57), (60) and (72) and the cases (72) and (73) can be reduced in weight and size while securing rigidity. Is completed,
Also from this point, the work of attaching and detaching the planting mechanism (34) to and from the planting drive case (22) can be facilitated.

Reference numeral (74) denotes a fulcrum shaft case for supporting the driven arm fulcrum shaft (68). As shown in FIG.
With this arrangement, it is attached to the planting arm shaft case (73) so that the position can be freely changed in the front-rear direction. (76) is an arc-shaped long hole provided at the base of the adjustment plate (75), and (77) is a planting arm shaft case.
A mounting seat fixed to (73) and (78) are fixing bolts.

Then, the fulcrum shaft case (74) is connected to the planting arm shaft.
By rotating back and forth around (62), the position of the driven arm fulcrum shaft (68) is changed, and as shown in FIG. 4, the rotation trajectory of the planting arm (67) and the planting claw (66) Can be adjusted.

This makes it possible to adjust the amount of the seedlings to be taken vertically by the planting claws (66).

A ball bearing (79) supports both sides of the driven arm fulcrum shaft (68), as shown in FIG.
It is mounted on a fulcrum shaft case (74) integrated in a wide shape.

FIG. 7 shows a mounting state of the seedling mounting table (33). The seedling mounting table (33) is supported by a drive shaft case (72) having a circular cross section. Reference numeral 79) denotes a support plate protruding from the upper portion of the drive shaft case (72), and has a vertically long hole (80) formed in the upper portion. Reference numeral (81) denotes a protruding pin projecting from the seedling extraction plate (33-1) of the seedling mounting table (33), and is fitted in the elongated hole (80).
(82) is a rotating arm rotatably fitted on the outer periphery of the drive shaft case (72), provided with an operating plate (83) in the horizontal direction, and a connecting plate (84) protruding below. I have. The operating plate (83) is provided with a fixing pin (85) facing downward.

Reference numeral (86) denotes upper and lower adjustment plates projecting below and on the right and left of the seedling removal plate (33-1), respectively. The fixing pins (85) are fitted in the cutout grooves (87) in the horizontal direction. are doing.

Reference numeral (88) denotes an adjustment lever for moving the seedling mounting table (33) up and down to adjust the removal amount of the seedling. The adjustment lever is movable left and right about the fulcrum shaft (89). (90) is an operating rod provided at the lower end of the adjusting lever (88), and is a connecting plate of the rotating arm (82).
(84). (91) is a connection pin, (92) is a mounting pin, and (88-1) is an adjustment scale plate.

When the adjusting lever (88) is turned clockwise, the turning arm (82) is turned clockwise, and the seedling mounting table (33) is moved downward. The amount is increasing. When the adjustment lever (88) is rotated to the left, the seedling mounting table (33) moves upward, and the operation amount of the seedling decreases.

In this case, since the turning arm (82) for vertically adjusting the seedling mounting table (33) is supported by the drive shaft case (72), an operation link for adjusting the amount of seedlings to be taken out is provided. No bearing part is required, and the structure becomes compact.

Since the support member of the seedling mounting table (33) is also used by the drive shaft case (72) having a circular cross section, the rigidity as a bearing is high, and the seedling mounting table (33) is supported in a stable state. Is what you can do.

FIG. 8 shows a mounting structure of a side frame for supporting the seedling mounting table (33).
The planting mount (94) fixed to the planting drive case (22) is connected to the lifting link mechanism (23) by a rolling shaft provided in front of the planting mount (93).

Reference numeral (95) denotes a U-shaped side frame connected to the upper part of the planting mount (93), which is integrated right and left. A support roller (96) for supporting the seedling mounting table is mounted on the upper part of the side frame (95). So, in this case,
Because the side frame (95) is left and right integrated,
The position of the left and right support rollers (96) does not shift, and the seedling table (23)
Can always be smoothly reciprocated, and the seedling mounting table (33) does not attach in a twisted manner.

The embodiment of the present invention is constructed as described above. When the amount of seedlings is adjusted by changing the amount of lateral movement of the seedling mounting table (33), the planting drive case (22) is used. ) Right side (a)
Take out the traverse switching gear case (44) connected to the traverse feed drive gear (41) and the traverse feed driven gear (43), change the gear ratio, and reassemble the traverse feed shaft (42) and the traverse feed shaft (42). Change the rotation speed of the lead screw (46).

Thus, the moving amount of the seedling table (33) interlockingly connected to the lateral feed screw (46) is changed.

In order to adjust the length of the seedlings mounted on the seedling mounting table (33), the planting mechanism (34) connected to the planting drive case (22) is used.
By changing the driven arm fulcrum shaft (68) back and forth around the planting arm shaft (62), the vertical trajectory of the seedling can be changed while changing the rotation locus of the planting claw (66). The amount can be adjusted.

As described above, in the case of the present invention, a lateral feed switching gear case (44) for adjusting the amount of seedlings is provided on the right side (a) of the planting drive case (22). (twenty two)
It is possible to change the position at the side of the plant.
In addition to being compact, the front-rear balance is improved to an optimal state.

Then, the entire planting section can be easily assembled,
In addition, timing adjustment of the planting claws (66) is facilitated.

Further, the horizontal feed screw (46) and the vertical feed cam shaft (51)
Are located together on the left side (b) of the planting drive case (22), so that the weight distribution including the eccentricity of the input shaft (35) is good, and the bearing is located near the side frame (95). Therefore, the planting frame (29) can be configured functionally.

The present invention also provides a planting arm for connecting a planting transmission shaft (57) connected to a planting drive case (22) and a planting arm shaft (62) of a planting mechanism (34). Since the drive shaft (60) is covered by the pipe-shaped drive shaft case (72) having a circular cross section, the drive shaft case (72) can be configured simply and the weight can be reduced. .

Further, in the planting mechanism section (34), the base of the adjusting plate (75) having the fulcrum shaft case (74) attached to the tip is mounted to be swingable in the front-rear direction. The driven arm fulcrum shaft (68) can be changed in the front-rear direction and the planting claw (66)
Of the seedlings is adjusted, thereby making it possible to freely adjust the length of the seedlings. Therefore, the whole mechanism for adjusting the length of the seedlings is simplified, so that the number of parts is reduced and the adjustment method is reliable. This is an excellent effect.

[0056]

According to the present invention, the following effects can be obtained. That is, in the present invention, the planting drive case is connected with a transverse feed screw for reciprocating and laterally moving the seedling mounting table in the left-right direction, and a vertical feed camshaft for vertically feeding the vertical feeding device provided on the seedling mounting table. As a result, the size of the planting drive case can be reduced compared to the case where the lateral feed screw and the vertical feed cam shaft are provided inside the planting drive case. In addition, since the lateral feed screw and the vertical feed cam shaft extend from the same side surface of the planting drive case to the same outer side, the lateral feed screw and the vertical feed cam shaft are separated from each other by the planting drive case. Compared to the case of extending in the opposite direction, it is possible to improve the assemblability and workability of the planting portion transmission structure, thereby reducing the manufacturing cost. Furthermore, on the side opposite to one side of the planting drive case where the transverse feed screw and the vertical feed cam shaft are interlocked, the power input to the planting drive case is transferred to the transverse feed shaft for driving the transverse feed screw. Since the transverse feed switching mechanism for transmitting the power is provided, the planting drive case can be made compact.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter equipped with the present invention.

FIG. 2 is a power transmission mechanism diagram of a planting section.

FIG. 3 is a plan view of a main part of the planting section.

FIG. 4 is an enlarged side view of the planting mechanism.

FIG. 5 is a perspective view of the main part.

FIG. 6 is a sectional view of a fulcrum shaft case of the planting mechanism.

FIG. 7 is a rear view showing a mounting portion of the seedling mounting table.

FIG. 8 is a perspective view showing a mounting structure of a side frame supporting a seedling mounting table.

[Explanation of symbols]

 (C): Planting part (22): Planting drive case (33): Seedling stand (34): Planting mechanism (44): Lateral feed switching gear case (46): Lateral feed screw (51): Vertical Feed cam shaft (57): Planting transmission shaft (60): Planting arm drive shaft (62): Planting arm shaft (64-1): Bevel gear transmission mechanism (64-2): Bevel gear transmission mechanism (66): Planting claw (68): driven arm fulcrum shaft

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuhiko Tanaka 1-32 Chaya-machi, Kita-ku, Osaka, Osaka Inside Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Masataka Fujimoto 1-32, Chaya-cho, Kita-ku, Osaka, Osaka No. Within Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Yasuhiko Kashiwamura No. 1-32, Chayacho, Kita-ku, Osaka, Osaka Prefecture Inside Yanmar Agricultural Machinery Co., Ltd. No. Inside Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A seedling mounting table provided with a plurality of seedling mounting portions (33).
The drive case with a fixed stroke to reciprocate left and right
(22) is a riding rice transplanter provided with a vertical feeding device for vertically feeding the seedlings by a predetermined amount at the stroke end of the seedling mounting table (33), the planting drive case (22) ,
Lateral feed screw to move the seedling mounting table (33) back and forth in the horizontal direction
(46) and a vertical feed cam shaft (51) that drives a vertical feed device provided on the seedling mounting table (33) in an interlocking manner, and the lateral feed screw (46) and the vertical feed cam shaft (51) are connected. ) Is the planting drive case (2
2) While extending from the same side to the same outside from the same side, these side feed screws (46) and one side of the planting drive case (22) in which the vertical feed cam shaft (51) are interlocked and connected are On the opposite side, a transverse feed switching mechanism (44a) for transmitting the power input to the planting drive case (22) to the transverse feed shaft (42) for driving the transverse feed screw is provided. Planting part transmission structure in rice transplanter.