JP3163082B2 - Planting part transmission structure in riding rice transplanter - Google Patents

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. The planting drive case is provided with a traverse feed switching mechanism for transmitting the power input to the planting drive case to a traverse shaft for driving the traverse screw.

[0003]

However, in the above-described planting portion transmission structure, 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 camshaft extend from the planting drive case in opposite directions, so the planting part transmission structure 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]

Therefore, according to the present invention, a plurality of drive shaft cases provided with a planting mechanism at a rear portion by arranging a horizontally long connecting pipe along the left-right direction and planting a seedling on a rice field, the connecting pipe parallel with each other, as well as configured to be continuously provided in a cantilever rearward, the connecting pie
The planting drive case is fixed to the plant and the seedlings are mounted on the planting drive case.
One side of the traverse screw that drives the table back and forth
Rotationally driveable, and insert the transverse feed screw into the
The connecting pie
The other end of the lateral feed screw is rotatable on the support member fixed to the
By supporting , the lateral feed screw is disposed such that the lateral center of the lateral feed screw is deviated to one of left and right with respect to the lateral center of the connecting pipe, and the lateral feed screw is rotationally driven, whereby the lateral feed screw is rotated. It is an object of the present invention to provide a planting part transmission structure in a riding rice transplanter, wherein the seedling mounting table is configured to be driven to reciprocate and traverse in the left-right direction.

[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. Then, 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. Further, (52) is a longitudinal feed cam that protrudes integrally with the longitudinal feed cam shaft (51) and intermittently acts on an operation member (not shown) that drives the longitudinal feed device longitudinally. The vertical feed cam (52) engages with the operation member each time the seedling mounting table (33) is positioned at the left and right moving ends. The left end of the vertical feed cam shaft (51) is rotatably supported by a ball bearing (53-1). Both ends of the 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 engages with the bevel gear (61) in the center on the arm shaft
(63) is installed. The bevel gear transmission mechanisms (64-1) and (64-2) are respectively 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.

In addition, the connecting pipe (71), which is horizontally long along the left-right direction, has a planting mechanism for planting seedlings on the rice field.
A plurality of drive shaft cases (72) provided at the rear with (34) are arranged in parallel with each other and in a cantilevered manner in a rearward direction, and the drive case planted on the connection pipe (71). (2
2) is fixed, and one side of a lateral feed screw (46) for driving the seedling table (33) reciprocatingly in the left-right direction is rotatably supported in the planting drive case (22). The feed screw (46) is projected outward from the planting drive case (22), and the other end of the lateral feed screw (46) is rotated on the support member (99) fixed to the connection pipe (71). The lateral feed screw (46) is disposed so that it can be freely supported, and the lateral center of the lateral feed screw (46) is deviated leftward with respect to the lateral center of the connection pipe (71). By rotating and driving the lateral feed screw (46),
(33) is configured to be reciprocally traversed in the left-right direction.

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.

Thus, it is possible to adjust the amount of 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.

Numerals (86) denote upper and lower adjusting plates projecting from the left and right sides of the seedling removal plate (33-1), respectively. The fixing pins (85) are fitted with the cutout grooves (87) in the horizontal direction. are doing.

Reference numeral (88) denotes an adjusting lever for moving the seedling mounting table (33) up and down to adjust the amount of seedlings to be taken out. The adjusting 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 table (33) is moved downward, and the seedling is taken out. The amount is increasing. When the adjustment lever (88) is rotated to the left, the seedling mounting table (33) moves upward, and the amount of actuation of the seedlings decreases.

In this case, since the turning arm (82) for vertical adjustment of 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.

Further, 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).

(95) is 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 amount of movement of the seedling table (33) interlockingly linked to the lateral feed screw (46) is changed.

When adjusting the amount of seedlings to be taken from the seedling mounting table (33), the planting mechanism (34) connected to the planting drive case (22).
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.

Also, 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 adjustment plate (75) having the fulcrum shaft case (74) attached to the tip is mounted so as 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.

[0057]

According to the present invention, the following effects can be obtained. That is, in the present invention, the planting drive case is fixed to the connecting pipe, and one side of a lateral feed screw that drives the seedling mounting table to reciprocate laterally in the left-right direction is rotatably supported by the planting drive case. The lateral feed screw is projected outward from the planting drive case, and the other end of the lateral feed screw is rotatably supported by the support member fixed to the connection pipe. Is stably supported by the support frame having sufficient strength formed by the planting drive case, the support member, and the connection pipe.

As a result, when the lateral feed screw is rotationally driven by the planting drive case, the lateral feed screw is smoothly rotated with low resistance, and the seedling table is also smoothly moved in the left-right direction by the lateral feed screw. It is driven in a reciprocating horizontal feed.

Therefore, the planting mechanism can smoothly take out the seedling from the seedling mounting table and plant it on the rice field, so that the planting performance of the planting part can be improved. Since the lateral feed screw projects outward from the planting drive case, the planting drive case for driving the lateral feed screw can be formed as compact as possible. The weight of the part can be reduced and the manufacturing cost can be reduced.

Further, since the lateral feed screw is arranged so that the left and right center of the lateral feed screw is deviated to one of the left and right sides with respect to the left and right center of the connecting pipe, the connecting portion of the lifting link mechanism at the planting portion is provided. The horizontal feed screw is slightly deviated to one of the left and right sides, and maintenance work near the horizontal feed screw (for example, replacement of the horizontal feed screw, application of grease to the horizontal feed screw, Adjustment of the connection portion) can be easily performed without being obstructed by the connection portion of the lifting link mechanism in the planting portion, and the workability of the planting portion can be improved.

[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 Continuing on the front page (72) Masataka Fujimoto, Inventor 1-32 Chaya-cho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Agricultural Machinery Co., Ltd. No. Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Yuichi Takeda 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Yanmar Agricultural Machinery Co., Ltd. 58-85920 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/02

Claims (1)

(57) [Claims] 1. A connecting pipe (71) which is horizontally long along the left-right direction.
A plurality of drive shaft cases (72) provided at the rear with a planting mechanism (34) for planting seedlings on the rice field are parallel to each other on the connecting pipe (71), and cantilevered rearward. The planting drive case (22) is fixed to the connecting pipe (71), and
The seedling table (33) is reciprocated in the horizontal direction in the planting drive case (22).
One side of the horizontal feed screw (46) that can be driven to rotate
The horizontal feed screw (46) out of the planting drive case (22).
It does not project to the side and is fixed to the connecting pipe (71).
The other end of the lateral feed screw (46) can be freely rotated on the fixed support member (99)
And the lateral feed screw with respect to the left and right center of the connecting pipe (71).
The lateral feed screw (46) is arranged so that the left and right center of (46) is deviated to one of the left and right sides, and the lateral feed screw (46) is rotationally driven to move the seedling mounting table (33) left and right. A planting portion transmission structure in a riding rice transplanter, wherein the planting portion is configured to be reciprocally traversed in a direction.