JPH0720407B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a riding rice transplanter.

(B) Conventional Technology Conventionally, as a rice transplanter for passenger use, one described in Japanese Patent Publication No. 57-41885 has been developed.

That is, such a rice transplanter, as shown in FIG. 21,
The planting device (93) is connected to the rear of the rice transplanter body (90) so as to be able to move up and down through the lifting link mechanism (92), and is attached to the left and right side walls of the mission case (94) of the rice transplanter body (90) The front ends of the pair of left and right transmission cases (96) (96) are connected, and the rear wheels (95) (95) are attached to the rear ends of the transmission cases (96) (96). The horizontal machine frame (97) is laid horizontally between the middle parts of the 96), the pillar (98) is erected on the horizontal machine frame (97), and the lifting link mechanism (92) is attached to the pillar (98). Are configured.

(C) Problems to be solved by the invention However, in the case of the above-mentioned passenger rice transplanter, the transmission cases (96) (96), which are power transmission mechanisms to the rear wheels, move from the mission case (94) to the lifting link mechanism (92). ) Is a main frame with a supporting function up to and including the transmission case (96) (9
6) Rear wheels (95) (95) are attached to the rear end, and the transmission case (96) (69) also has a lifting link mechanism (92).
Since the planting device (93), which is a heavy object, is supported via the power transmission device, the power transmission function is provided to the transmission case (96) (96) in addition to the power transmission function to the transmission case (96) (96). Other than that, it is necessary to secure rigidity, and the same transmission case (96)
There is a problem that the size of the (69) is increased and the weight is increased, and the weight of the entire machine body is increased.

(D) Means for Solving the Problems In the present invention, in a riding rice transplanter in which a planting device is movably connected to the rear of a self-propelled rice transplanter main body through an elevating link mechanism, From the mission case, the lower connecting frame is extended rearward, and at the rear part of the lower connecting frame, the lower connecting frame whose both ends are connected to the rear axle case is connected, and the vertical frame is connected to the lower connecting frame. A lifting link mechanism is pivotally connected to the vertical frame, and a planted transmission shaft is supported by a shaft support portion continuously provided on the front side of the vertical frame, and further, the upper part of the vertical frame and the lower connection frame are connected. An upper connecting frame is installed in an inclined shape of front low rear high, and a rice transplanter for riding is provided.

(E) Action / Effects In the present invention, the lower connecting frame, the upper connecting frame, and the vertical frame can sufficiently secure bending and torsional rigidity of the machine body, and prevent left and right distortion, and thus the lifting link. The mechanism can be surely supported, and the lifting link mechanism can be operated smoothly at all times.

Also, since the planted transmission shaft is supported by the shaft support provided on the front side of the vertical frame, the planted transmission shaft can always rotate smoothly, and the design of the position of the shaft support etc. can be designed. The degree of freedom can be increased. Moreover, when the front transmission shaft and the rear transmission shaft are interlocked and connected via the universal joint, the front transmission shaft is supported, so that the front transmission shaft does not become long and the front transmission shaft does not become long. The angle formed between the universal joint provided at the rear end of the partial transmission shaft and the rear transmission shaft can be made gentle, and rotation of the planted transmission shaft is easy.

Further, since the upper connecting frame is installed between the upper part of the vertical frame and the lower connecting frame in an inclined shape of front low rear high, the planting device can be reliably supported and the planting device can be raised and lowered. In the case of
It is possible to reinforce the vertical frame that receives the tensile force from the planting device.

Therefore, the connecting machine frame of the rice transplanter can be configured with a simple structure of the upper and lower connecting frames, and the weight of the entire machine body can be reduced.

(F) Embodiments An embodiment of the present invention will be described in detail with reference to the drawings. (A) shown in FIGS. 1 and 2 is a riding rice transplanter, which is located behind a self-propellable rice transplanter body (1). The planting device (2) is connected via a lifting link mechanism (3) so as to be lifted and lowered.

Then, the rice transplanter main body (1) mounts the prime mover part (4 ') on the machine body frame (a), connects the front end part of the mission case (4) to the rear end of the machine body frame (a), Left and right front axle cases (5) and (5) are projectingly provided on the left and right sides of the front part of the mission case (4), and each case (5) (5)
Front wheels (6) and (6) are attached to the rear end of the transmission case (4), and the connecting frame (7) is connected to the rear end of the transmission case (4). (8)
(8) is attached, and the rear wheel (9) is attached to each case (8) (8).
(9) is attached, and the operating section (10) is provided above the mission case (4) and the connecting machine frame (7).

The operating section (10) is provided with a front casing (11) that also serves as a bonnet of the prime mover section (4 ') and a handle column, and a handle (12) is attached to the upper surface of the casing (11). A sub-transmission lever (13) is provided on the upper left side surface so as to project upward, and a seat (14) is provided on the coupling frame (7) behind the casing (11).
Main shift lever (15) is installed on the left side of the
A planting lift lever (15 ') is arranged on the right side of the.

Further, (16) is an integrally molded seat lower casing made of synthetic resin having high rigidity such as FRP so as to also serve as a floor surface, a speed change guide plate, a fender, a seat mounting plate, etc., and the seat (14) is the same. It is attached directly to the casing (16).

(17) is a drive shaft provided in the motor part (4 '), (18) is a passive shaft provided in the upper rear part of the mission case (4), (19)
Is a transmission belt wound between the drive shaft (17) and the passive shaft (18).

(20) and (20) are the output shafts (21) and (21) projecting from the left and right sides of the center of the mission case (4), and the input shafts (22) and (22) of the left and right rear axle cases (8) and (8). It is a transmission shaft interposed between.

Further, as shown in FIGS. 3 to 5, the coupler frame (7) has a pair of left and right lower coupling frames (30) (30) inclined rearward and downward from the rear left and right side walls of the mission case (4). And the lower connecting machine frame (31) is laterally connected between the rear ends of the connecting frames (30) and (30) to form a machine frame having a rectangular shape in plan view, and the lower connecting machine frame (31 ), A pair of left and right vertical frames (32) and (32) are erected, and an upper coupling frame (33) is horizontally connected between the upper ends of the vertical frames (32) and (32) to form a rectangular shape in rear view. Forming the machine frame, and between the upper parts of the vertical frames (32) (32) and the rear upper left and right side walls of the mission case (4),
By constructing a pair of left and right upper connecting frames (34) (34) in a front-rear-rear-high inclined manner to form a machine frame that is rectangular in plan view and a machine frame that is trapezoidal in side view, It has a three-dimensional box frame structure. (30a) is a front end connecting part of the lower connecting frame, and (34a) is a front end connecting part of the upper connecting frame (34).

Then, the upper and lower connecting frames (34) (3
4) Reinforcement horizontal axis (35) (36) between each halfway of (30) (30)
Horizontally connecting the upper and lower connecting frames on the left and right (34)
Reinforcing plates (37) (37) are stretched between the front parts of (34) (30) (30). (S) is an internal space formed by the connector frame (7).

As described above, since the connecting machine frame (7) has a three-dimensional box-type frame structure, it can be made lighter and have higher rigidity against bending, twisting, etc., and the interior formed by the connecting machine frame (7). The space (S) can be a space for disposing the lifting cylinder (47) and the like, as described later.

The lower connecting frames (30) (30) described above are made of straight pipes having a rectangular cross section, and are inclined downward toward the rear lower side, and both ends of the lower connecting horizontal frame (31) horizontally connected between the rear ends. The rear axle case (8) (8) is attached to.
(31a) and (31a) are connecting plates provided at both ends of the lower connector frame (31).

Therefore, the ground clearance of the rear axle cases (8) (8) attached to the rear ends of the lower connecting frames (30) (30) is lowered to lower the lower connecting machine frame between the tips of the frames (30) (30). Since the mounting height of the lifting link mechanism (3) on the vertical frame (32) (32) standing on the (31) can be lowered, the planting device () attached to the lifting link mechanism (3) ( 2)
The lifting operation control of can be performed in a stable state.

As shown in FIGS. 1 to 6, the vertical frames (32) and (32) are erected on the upper surface of the lower coupling machine frame (31), and the entire frame has a welded structure, so that the rigidity of the frame is improved. In addition to the large frame structure, it may be installed upright as shown in FIGS.

That is, the vertical frames (32) (32) shown in FIG. 7 are erected on the rear end upper surfaces of the lower connecting frames (30) (30), and the vertical frames (32) ( 32) is integrally molded with the lower connecting frames (30) (30) to simplify the structure.

Further, the vertical frames (32) (32) shown in FIG. 9 are erected on the upper surface of each rear axle case (8) (8) so that the left and right vertical frames (32) (32) are spaced apart from each other on the lower left and right sides. It is wider than the space between the connecting frames (30) (30).

Therefore, in the case of the vertical frame (32) (32) shown in FIG.
The lifting link mechanism (3) can be easily attached to the same frame (32) (32), and the planted transmission shaft (50) described later can be easily arranged between the same frame (32) (32). become.

Moreover, since the vertical frames (32) (32) are directly attached to the rear axle cases (8) (8), the torsional rigidity of the cases (8) (8) against the wheel load can be secured.

In addition, the vertical frame (32) (32) is the transmission shaft (20) (20)
It can be erected at a position as shown in FIGS. 10 to 16 depending on the positional relationship with the transmission shafts (20) (20) and the lower connecting frames (30) (30). .

That is, as shown in FIG. 10, the vertical frames (32) and (32) are vertically arranged inside the transmission shafts (20) and (20) as shown in FIG. As described above, there is a case in which the transmission shafts (20) (20) are erected so as to be positioned outside of the shafts.

In addition, as shown in FIG. 12, a case where the transmission shaft (20) and the lower connecting frame (30) are placed upright,
As shown in the drawing, the case where the transmission shaft (20) and the lower connecting frame (30) are placed upright inside and the 14th
As shown in the figure, there are cases in which the transmission shaft (20) is erected on the same vertical line or outside the transmission shaft (20).

Further, the vertical frames (32) (32) are the
As shown in Fig. 15, it is installed vertically when it is positioned on the rear extension line of the transmission shaft (20), and when it is installed vertically on the rear extension line of the lower connecting frame (30) as shown in Fig. 16. In some cases

When the vertical frame (32) is located on the rear extension line of the lower connecting frame (30), the vertical frame (3
When 2) is erected directly on the upper surface of the lower coupler frame (31) and when it is erected on the stay by projecting a vertical frame supporting stay rearward from the lower coupler frame (31). (Not shown).

As described above, the space between the vertical frames (32, 32) is widened by the standing positions of the vertical frames (32) (32) to facilitate the attachment and detachment work of the lifting link mechanism (3) and The support can be ensured, or the space can be narrowed to make the airframe compact.

Further, the horizontal width (W) of the rear end portion of the mission case (4), which connects and supports the front end portions of the left and right lower connecting frames (30) (30), as shown in FIG. The width (W ') between the outer surfaces of the frames (30) and (30) is formed to be narrower than the front lateral width (W) of the case (4) and the front lateral width (W) of the mission case (4). It is designed to be narrower than

The width between the outer surfaces of the left and right upper connecting frames (34) (34) is also substantially the same as the width between the outer surfaces (W ') of the left and right lower connecting frames (30) (30).

Further, the main transmission lever (15) is attached to the left end of the reinforcing horizontal shaft (35) whose base end is laterally bridged between the left and right state connecting frames (34) and (34). The lifting lever (15 ') with a plant has a base end on the right side of the upper connecting frame (34).
It is attached to the lever support shaft (38) that projects more laterally outward.

In addition to this, the main transmission lever (1
5), and the operation system other than the planted lift lever (15 ') and the fulcrum of the interlocking link system linked to these levers can be freely provided without interfering with other members.

Further, the rear ends of the upper connecting frames (34) (34) are fixed to the inner walls of the upper portions of the vertical frames (32) (32), respectively. (3)
A support shaft (41) pivotally supporting the front end of the upper link (43) of the above is mounted between the upper parts of the vertical frames (32) (32).

Therefore, by the upper connection frame (34) (34),
It is possible to reinforce the vertical frames (32) (32) to which a tensile force acts via the upper link (43).

In addition, the transmission shafts (20) (20) are provided outside the lower connecting frames (30) (30) in a side view thereof.
It is located substantially on the same line as (30) and on the line connecting the output shaft (21) of the mission case (4) and the rear wheels (9a) (9a).

The lifting link mechanism (3) is interposed between the vertical frames (32) (32) of the coupling machine frame (7) and the planting device (2).

That is, the up-and-down link mechanism (3) has a support shaft (41) in which the front end is erected between the upper portions of the pair of left and right vertical frames (32, 32).
And the rear end of the planting frame (42) of the planting device (2).
The upper link (43) connected to the upper part of the shaft (43a) and the front end to the lower part of the left and right vertical frames (32) (32)
a) (44a) and a parallel link with a pair of left and right lower links (44) (44) pivotally supported by a connecting support shaft (45) which is connected to the rear end of the planting frame (42) between the lower ends thereof. Between the front ends of the pair of left and right lift arms (46) (46), whose base ends are integrally attached to the front ends of the lower links (44) (44), and the lower rear end of the mission case (4). An elevating cylinder (47) is provided in the interior space (S) of the coupling machine frame (7) between the lift arms (46) (46) and the coupling support shaft (45). It is configured by interposing tension reinforcing links (48) (48).

Moreover, as shown in FIGS. 17 and 18, the lower link (44) is located on the outer side of the vertical frame (32) and protrudes from the lower front surface of the vertical frame (32). The front end of the lift arm (46a) is pivotally supported (44a) on the bracket (44b), and the base end of the bracket (44b) is pivotally supported (44a) to rotate integrally with the lower link (44). The tip,
The lift arm (46) located inside the base end
The front end of the tension reinforcing link (48) located inside the vertical frame (32) is attached to the tip of the lifting cylinder (4
Pivot support (47b) together with the tip of cylinder rod (47a) of 7)
It is connected. (54) is the lower left and right links (44) (44)
A reinforcing horizontal frame horizontally connected between the front parts of the two, and (55) is a reinforcing horizontal frame horizontally connected between the middle parts of the tensile reinforcing links (48) and (48).

Therefore, the space between the left and right lower links (44) (44) located outside the left and right vertical frames (32) (32) is wider than the space between the vertical frames (32) (32). The rigidity of the parallel link composed of the lower links (44) (44) and the upper link (43) is increased.

Moreover, the front end of the lower link (44) is connected to the vertical frame (32).
Since it is attached to the link support bracket (44b) protruding from the lower front surface of the lower part of the plant, the vertical link (32) and the planting device (2) are kept at a constant interval, and the lower link (44) is arranged.
Since the length of (44) can be increased to increase the turning radius, the amount of forward and backward movement of the planting device (2) when moving up and down can be reduced, and the vertical frame (32) By narrowing the gap with the planting device (2), the overall body can be made compact.

Further, as shown in FIG. 19, not only the lower link (44) but also the front end connecting position of the upper link (43) is connected to the vertical frame (3
It is also possible to reduce the amount of movement of the planting device (2) back and forth by locating it in front of 2). (43b) is a front end connecting portion of the upper link (43).

In FIG. 19, (P) shows the rear end of the upper link (43) when the front end connecting portions of the upper and lower links (43) (44) are positioned in front of the vertical frame (32) as described above. The rotation locus, or (P '), is the rotation of the rear end of the upper link (43) when the front end connecting portions of the upper and lower links (43) (44) are positioned rearward of the vertical frame (32). It is a locus, and the rotation locus (P) indicates that the amount of forward and backward movement is smaller by (t).

In addition, the lifting cylinder (47) includes a cylinder rod (47
By shortening a), the lift arm (46)
Rotate (46) forward and downward to move the upper and lower links (43) (4
4) The planting device (2) can be raised by operating the planting device (2) via the (44), and conversely, the cylinder rod (47a) can be extended by operating the planting device (2). There is. (47b) is a tip connecting portion of the cylinder rod (47a).

Therefore, the lifting cylinder (47) requires a smaller amount of oil as compared with the case where the planting device (2) is lifted in conjunction with the extension operation of the cylinder rod (47a), and thus can be downsized. Further, the connecting machine frame (7) surrounding the lifting cylinder (47) and the like can be downsized, and the entire machine body can be made compact.

Moreover, the base end of the lifting cylinder (47) is connected to the lower rear end located below the lower connecting frame (30) (47c).
The height of the lifting cylinder (47) is lowered in combination with the reduction of the height of the lifting link mechanism (3) described later.

Therefore, since the lifting cylinder (47) is disposed at the substantially central portion of the front and rear wheels (6) and (9) and at a low position, the body balance is good and the running stability and work stability are excellent. It becomes a thing.

In the rear axle cases (8) and (8), as shown in FIG. 2, the inner side walls (8a) and (8a) are notched from the vicinity of the connecting portion with the lower connecting machine frame (21) to the rear end. The recesses are formed inside the cases (8) and (8) to form non-interference spaces (S ′) and (S ′) with the lower links (44) and (44) of the lifting link mechanism (3). .

Then, the lower links (44) (44) of the lifting link mechanism (3) can move up and down in the non-interference spaces (S ′) (S ′), and the left and right lower links (44) ( Four
In addition to widening the interval of 4), the mounting positions of the front ends of the lower links (44) (44), which are pivotal fulcrums, are made as low as possible (see Fig. 3).

Therefore, since the non-interference spaces (S ') (S') are formed inside the rear axle cases (8) (8), straight rectangular pipes are attached to the left and right lower links (44) (44). Even if it is used, the lower links (44) (44) can be widened without interfering with the rear axle case (8) (8), and can be twisted by the rolling of the planting device (2). The rigidity with respect to can be improved.

Moreover, since the pivotal fulcrum position of the lower links (44) (44) is set as low as possible, the stability of the rice transplanter body (1) is improved and the total length of the lower links (44) is shortened. Then, the planting device (2) can be smoothly moved up and down in the state of being brought close to the rice transplanter body (1), and the riding rice transplanter (A) as a whole can be made compact.

Further, in the planting device (2) shown in FIGS. 1 and 2, (51) is a planting mission case, (52) is a seedling mount,
(53) is a float.

Further, (50) is a mission case (4) of the rice transplanter body (1) and a mission case (51) of the planting device (2).
It is a planted transmission shaft that connects and link with.

The transmission shaft (50) is formed by interlocking the front transmission shaft (50a) and the rear transmission shaft (50b) via a universal joint (50c).

The front transmission shaft (50a) has its front end interlockingly connected to the mission case (4) in the internal space (S) of the coupling machine frame (7), and its rear end as shown in FIG. )
Is pivotally supported by a shaft support (56) fixed to a link support bracket (44b) provided on the front side of the.

The rear transmission shaft (50b) is configured such that the outer pipe shaft and the inner pipe shaft are spline-fitted to be extendable and contractible, and the front end thereof has the shaft support portion (5b).
Immediately after 6), at the rear end of the front transmission shaft (50a), the universal joint (50
The rear end is linked to the planted mission case (51) by linking via c).

Therefore, in the planted transmission shaft (50), even when the planting device (2) moves up and down, the rear transmission shaft (50b) has a universal joint (50).
It rotates up and down around c) and expands and contracts to ensure the power transmission function from the mission case (4) of the rice transplanter body (1) to the planting mission case (5) of the planting device (2). Is something that can be done.

Further, since the front transmission shaft (50a) is pivotally supported by the shaft support (56) fixed to the link support bracket (44b) provided on the front side of the vertical frame (32), the planted transmission shaft The (50) can be rotated smoothly at all times, and the shaft support (5
It is possible to increase the degree of freedom in design such as the arrangement position of 6).

Moreover, since the front transmission shaft (50a) is interlockingly connected to the rear transmission shaft (50b) through the universal joint (50c), the front transmission shaft (50a) does not have to be long, and the front transmission shaft (50a) does not have to be long. The angle between the universal joint (50c) provided at the rear end of the shaft (50a) and the rear transmission shaft (50b) can be made gentle, and the planted transmission shaft (50)
There is no difficulty in rotating.

The embodiment of the present invention is configured as described above, and the transmission case (4) has a three-dimensional box-shaped connecting machine frame (7) capable of easily ensuring bending and torsional rigidity. ) Is attached, and since the lifting link mechanism (3) is mounted on the frame (7) of the connecting machine, the lifting link mechanism (3) can be reliably supported, and the structure is simplified to reduce the weight of the machine body. Can be achieved.

[Brief description of drawings]

 FIG. 1 is a side view of a riding rice transplanter according to the present invention. FIG. 2 is a plan view of the same. FIG. 3 is a side view of a main part. FIG. 4 is a plan view of an essential part. FIG. 5 is a perspective view of a coupling machine frame. FIG. 6 is a perspective view of a vertical frame standing structure. 7 to 9 are perspective views of another embodiment. 10 to 16 are explanatory views of the standing position of the vertical frame. FIG. 17 is a plan view of the lower link mounting structure. FIG. 18 is a side view of the same. FIG. 19 is an explanatory diagram of the lifting operation of the lifting link mechanism. FIG. 20 is a perspective view of the mid-portion support structure of the planted transmission shaft. FIG. 21 is an explanatory view of a conventional structure. (A): Riding rice transplanter (1): Rice transplanter main body (2): Planting device (3): Lifting link mechanism (4): Mission case (8): Rear axle case

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nikyo Yamamoto 1-32, Chaya-cho, Kita-ku, Osaka City, Osaka Prefecture Yanmar Agricultural Machinery Co., Ltd. (56) Reference JP-A-61-104714 (JP, A) Actual Kaisho 62-57606 (JP, U)

Claims (1)

[Claims] 1. A riding rice transplanter comprising a self-propelled rice transplanter main body (1), which is connected to a rear part of a planting device (2) via an elevating link mechanism (3) so that the rice transplanter main body (1) can be moved up and down. ) The lower connecting frame (30) is extended rearward from the mission case (4), and both ends are attached to the rear axle case (8) at the rear part of the lower connecting frame (30).
The lower connector frame (31) connected to (8) is connected, and the lower connector frame (31) is also provided with a vertical frame (32). The vertical frame (32) includes an elevating link mechanism ( 3) is pivotally connected, and the planted transmission shaft (50) is supported by a shaft support (56) that is continuously provided on the front side of the vertical frame (32).
Further, the riding rice transplanter is characterized in that an upper connecting frame (34) is installed between the upper part of the vertical frame (32) and the lower connecting frame (30) in an inclined shape of front low rear high.