JPH0729788Y2 - Rice transplanter - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Use The present invention relates to a rice transplanter for riding.

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

That is, such a riding rice transplanter, as shown in FIG.
The planting device (93) is connected to the rear of the rice transplanter body (90) via a lifting link mechanism (92) so that the planting device (93) can be moved up and down, and on 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 to each other, and the rear wheels (95) (95) are attached to the rear ends of the same transmission cases (96) (96).
The horizontal machine frame (97) is laid horizontally between the transmission cases (96) and (96), and the column (98) is erected on the horizontal machine frame (97). ) Is equipped with a lifting link mechanism (92).

(C) Problems to be solved by the device However, in the case of the above-mentioned riding rice transplanter, no consideration is given to the mutual positional relationship between the transmission case (96) and the mission case (94), and therefore, the wide shape is adopted. The front axle case (99), etc. in front of the formed mission case (94) could not secure a high ground clearance due to the positional relationship of the differential shaft in the mission case (94), resulting in poor running performance. .

(D) Means for Solving Problems Therefore, in the present invention, in the rear of the self-propelled rice transplanter main body,
In a passenger rice transplanter in which a planting device is vertically connected via an elevating link mechanism, a rearward extension is made between a mission case incorporating a front wheel diff shaft and an elevating link mechanism. A pair of left and right lower connecting frames arranged in an upward slope, a pair of left and right upper connecting frames arranged in a front downward slope with a space above the lower connecting frame, and a lower connecting frame and an upper connecting frame. A three-dimensional box-shaped connector frame composed of a pair of left and right vertical frames that connect the rear ends is interposed, and the space between the pair of left and right lower connector frames that form the connector frame constitutes the lifting link mechanism. The space between the left and right lower links is narrower, and a rear axle case with a rear axle connected to the rear end of each lower connecting frame is attached. Together to position the front wheel differential shaft above, there is provided a riding rice transplanter comprising respectively to position the rear axle on a substantially rearward extension line of the same frame.

(E) Action / Effect In the present invention, the diff shaft for the front wheels is positioned substantially on the extension line of the front of the lower connecting frame that is inclined forward.
Since the rear axle is located approximately on the extension of the rear of the frame, the ground height of a wide object such as a front axle case that inserts and supports the differential axle for the front wheels and a mission case to which the axle case is attached. Can be secured at a position higher than the rear wheel, which improves the running performance.

Further, since the transmission system of the front wheel differential shaft, the transmission case, and the rear axle are located on substantially the same straight line, the transmission system can be made compact, lightweight, and structurally strengthened.

Further, in the present invention, a pair of left and right lower connecting frames that extend rearward and are arranged in a forward upward slope are provided between the mission case including the diff shaft for the front wheels and the elevating link mechanism. A solid body composed of a pair of left and right upper connecting frames which are arranged above the lower connecting frame at an interval in a downward slope toward the front and a pair of left and right vertical frames which connect the lower ends of the lower connecting frame and the rear ends of the upper connecting frames. A box-shaped connecting frame is provided, and a space between the pair of left and right lower connecting frames forming the connecting frame is narrower than a space between a pair of left and right lower links forming the elevating link mechanism.

Therefore, it is possible to ensure sufficient strength of the connecting machine frame while maintaining a compact structure, reduce the weight of the riding rice transplanter, and achieve size reduction.

(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 provided 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 part (10) is provided with a front casing (11) that also serves as a bonnet of the prime mover (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 a lower seat casing integrally molded with a 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 a lower connecting lateral 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 horizontal frame (31 ), A pair of left and right vertical frames (32) (32) are erected, and an upper connecting horizontal frame (33) is horizontally connected between the upper ends of the vertical frames (32) (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.

Moreover, the above-mentioned lower connecting frame (30) (30) is made of a straight rectangular pipe in cross section, and has a forward ascending shape,
A rear axle case (8) (8) is attached to each rear end.

Therefore, the ground height of the rear axle cases (8) and (8) attached to the rear ends of the lower connecting frames (30) and (30) is lowered, and the rear axle cases (30) and (30) are laid across the rear ends of the frames. Since the mounting height of the elevating link mechanism (3) to the vertical frames (32) (32) erected on the lower connecting horizontal frame (31) can be lowered, the elevating link mechanism (3) was attached to the elevating link mechanism (3). The raising / lowering operation control of the planting device (2) can be performed in a stable state.

In addition, as shown in FIG. 6, the front axle case (5) is located approximately on the extension line of the axis (C) of the lower connecting frame (30) (30) which is inclined downward toward the rear as described above. The diff shafts (5a) (5a) for the front wheels that are inserted and supported in the rear axle case (8) are located substantially on the extension line of the axis (C) of the frames (30) (30) while the front wheel diff shafts (5a) (5a) are positioned.
The rear axles (9a) and (9a) provided in (8) are located.

In addition, as shown in FIG. 4, the left and right lateral widths (W) of the rear ends of the mission case (4) that connects and supports the front ends of the left and right lower connecting frames (30) (30) are the same as the mission case in plan view. It is formed to be narrower than the front lateral width (W) of (4), and the width (W ') between the outer surfaces of the frames (30) and (30) is smaller than the front lateral width (W) of the mission case (4). Is also narrow.

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).

The main transmission lever (15) is attached to the left end of the reinforcing horizontal shaft (35), the base end of which is horizontally bridged between the middle parts of the left and right upper connecting frames (34) (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 axles (9a) (9a).

The lifting link mechanism (3) is interposed between the vertical frames (32) (32) of the connector 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).

Further, (54) is a reinforcing horizontal frame horizontally connected between the front parts of the left and right lower links (44) (44), and (55) is a horizontal frame between the middle portions of the tensile reinforcing links (48) (48). It is a connected reinforcing horizontal frame.

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.

The rear axle cases (8) and (8) are connected to connecting plates (31a) and (31a) provided at both ends of the lower connecting horizontal frame (31), as shown in FIGS. 2 and 3. The inner wall (8a) (8a) of each case (8) (8) is recessed in a notched shape from the vicinity of the connecting portion with the lower connecting lateral frame (31) to the rear end, and the case (8) ( A space (S ') (S') that does not interfere with the lower links (44) (44) of the lifting link mechanism (3) is formed on the inner side of 8).

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. It is pivotally supported by the pivotal support (56) fixed to 44b).

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) 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.

The embodiment of the present invention is configured as described above, and according to this embodiment, the following operational effects are produced.

Mission case (4) and rear axle case (8)
A connecting machine frame (7) in which (8) is a three-dimensional box type frame configuration
Since they are connected with each other, bending and torsional rigidity can be easily ensured by the connecting machine frame (7), and the structure can be simplified to reduce the weight of the machine body.

Since the rear axle cases (8) and (8) are attached to the rear ends of the lower connecting frames (30) and (30), the cases (8) and (8) can be easily attached and detached. Maintenance of (8) can be done easily.

Lower connecting frame (30) (30) that is inclined forward
The front wheel differential shafts (5a) (5a) are located on the substantially front extension line of Fig. 1, and the rear axles (9a) (9a) are located on the substantially rear extension line of the same frame (30) (30). The front axle case (5) (5) through which the front wheel differential shafts (5a) (5a) are inserted and supported, and the axle case (5).
The ground height of a wide object such as the mission case (4) to which (5) is attached can be secured at a position higher than the rear wheels (9a) (9a), and the running performance is improved.

Front wheel differential shafts (5a) (5a), mission case (4), transmission shafts (20) (20), and rear axles (9a) (9a)
Since the transmission system of is located on substantially the same straight line, the transmission system can be made compact, lightweight, and structurally strengthened.

[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 an explanatory diagram of a main part. FIG. 7 is a perspective view of a midway part support structure of a planted transmission shaft. FIG. 8 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 (5a): Front wheel differential shaft ( 9a): Rear axle (30): Lower connecting frame

Claims (1)

[Scope of utility model registration request] 1. A riding rice transplanter comprising a self-propelled rice transplanter main body (1) and a planting device (2) connected to the rear wheel via a lifting link mechanism (3) so as to move up and down. A pair of left and right lower connecting frames that extend rearward and are arranged in a forward upward slope between the transmission case (4) including the differential shafts (5a) (5a) and the lifting link mechanism (3). (30) (30) and a pair of left and right upper connecting frames (34) (34) which are arranged above the lower connecting frames (30) (30) at an interval and are inclined downward toward the front.
And a three-dimensional box-shaped connector frame composed of a lower connecting frame (30) (30) and a pair of left and right vertical frames (32) (32) connecting the rear ends of the upper connecting frames (34) (34) The distance between the pair of left and right lower connecting frames (30), (30) provided via (7) is greater than the distance between the pair of left and right lower links (44) (44) forming the lifting link mechanism (3). The rear axle cases (8) and (8) in which the rear axles (9a) and (9a) are connected to the rear ends of the lower connecting frames (30) and (30) are attached to the lower connecting frames (30) and (30) (). 30)
The front wheel differential shafts (5a) and (5a) are positioned on the substantially front extension line of the above, and the rear axles (9a) and (9a) are positioned on the substantially rear extension line of the same frame (30) (30), respectively. Passenger rice transplanter.