JPH0718Y2 - 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 passenger use, 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 it can be moved up and down, and the rice transplanter body (90) is attached to the left and right side walls of the mission case (94). , 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 (9) is installed 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).

The lifting link mechanism (92) has a lifting cylinder (9
The tip of the piston rod (91a) in 1) is connected.

(C) Problems to be solved by the invention However, in the case of the above-mentioned passenger rice transplanter, the heavy load of the heavy load through the lifting link mechanism (92) to the transmission case (96) (96) which is a power transmission mechanism to the rear wheels. In order to support the planting device (93), the transmission case (96) (96) needs to have rigidity in addition to the power transmission function, and the transmission case (96) (96) is There is a problem that the size of the machine body increases as the size increases and the weight of the entire machine body increases.

Moreover, the lifting cylinder (91) is arranged between the left and right transmission cases (96, 96) having a wide vertical width, and in particular, the same cylinder (9
The base end mounting part of 1) can be replaced by the left and right transmission case (96).
Since the left and right sides are covered, it is difficult to attach and remove the lifting cylinder (91), and there is a problem that maintenance of the lifting cylinder (91) takes time.

(D) Means for Solving the Problems In the present invention, a self-propelled rice transplanter main body has a transmission case connected to a trapezoidal side view frame, which is a rear end portion of the mission case. From the above, a pair of left and right lower connecting frames are continuously connected rearward and downward, the connecting portion is used as a frame front end connecting portion, and a lower connecting horizontal frame is horizontally connected between the rear ends of the lower connecting frames. A pair of left and right vertical frames are erected on the lower connecting horizontal frame, and an upper connecting horizontal frame is horizontally connected between the upper ends of the vertical frames, and further between the upper part of the vertical frame and the rear upper and right side walls of the mission case. In addition, a pair of left and right upper connecting frames are installed so as to be inclined in the front, rear, rear, and height, and furthermore, an elevating link mechanism for elevating the planting device is attached to the vertical frame, and the same elevating link mechanism is provided. Place the base end of the lifting cylinder It is intended to provide a riding rice transplanter characterized by being attached to a mission case at a position lower than the frame front end continuous portion.

(E) Action / Effects In this invention, a side view trapezoidal connecting frame that can easily secure bending and torsional rigidity without connecting the planting device to the transmission case is connected to the mission case. Then
The connecting machine frame has a pair of left and right lower connecting frames continuously connected rearward and downward from the rear end of the transmission case, and the connecting portion serves as a frame front end connecting portion. The lower connecting horizontal frame is connected horizontally, and a pair of left and right vertical frames are erected on the lower connecting horizontal frame, and the upper connecting horizontal frame is horizontally connected between the upper ends of the vertical frames. Since a pair of left and right upper connecting frames are installed in an inclined shape of front low rear high between the above and the rear upper left and right side walls of the mission case, the planting device can be reliably supported and the structure can be improved. It is easy and the weight of the machine can be reduced.

Moreover, an elevating link mechanism for elevating the planting device is attached to the vertical frame, and the base end of the elevating cylinder for operating the elevating link mechanism is attached to the mission case at a position lower than the frame front end connecting portion. This makes it easy to attach and remove the lifting cylinder.

Moreover, since the ground clearance of the lifting cylinder can be lowered, the center of gravity of the body can be lowered, and the stability of the body can be improved.

Further, when the raising / lowering cylinder is operated to raise / lower the planting device, the vertical frame that receives the tensile force from the planting device can be reinforced by the upper connecting frame that is installed in the front low rear high inclination. It is a thing.

(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 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.

6 is a side view of the steering gear box (60) provided in the front casing (11), and FIG. 7 is a sectional view taken along the line I-I of FIG.

Then, as shown in FIG. 6 and FIG. 7, the steering gear box (60) has a fitting hole (62) for the stay (61) provided in the mounting plate (68) in the casing (11) at the front part. inside,
The lower end (60a) is fitted with a spigot fitting. (6
3) is the steering shaft, (64) is the handle shaft, (6
5) is a steering arm, (66) is a handle shaft mounting notch groove, and (67) is a stay fixing bolt.

Therefore, since the steering gear box (60) is attached to the stay (61) with the spigot fitting without using bolts or the like, the number of assembling steps can be significantly reduced, and
The cost can be reduced.

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 (14 '), (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.

As shown in FIGS. 3 to 5, the coupler frame (7) is provided with a pair of left and right lower coupling frames (30) (30) connected rearward to the rear left and right side walls of the mission case (4). Then, the same connecting portion is used as the frame front end connecting portion (30a) (30a), and the lower connecting horizontal frame (3) is provided between the rear ends of the connecting frame (30) (30).
1) is horizontally connected to form a machine frame that is rectangular in plan view, and a pair of left and right vertical frames (32) is attached to the lower connection horizontal frame (31).
(32) is erected, and the upper connecting horizontal frame (33) is horizontally connected between the upper ends of the vertical frames (32) and (32) to form a machine frame having a rectangular shape in rear view, and the vertical frame ( A pair of left and right upper connecting frames (34) and (34) are installed between the upper portions of 32 (32) and the rear upper left and right sidewalls of the mission case (4) in a front-rear-rear-high slanted shape to provide a plan view. By forming a rectangular machine frame and a side view trapezoidal machine frame, a three-dimensional box-type frame structure is formed. (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 lower connecting frames (30) (30) described above are made of straight rectangular pipes having a rectangular cross section, and are inclined downward to the rear rear side, and the rear axle cases (8) (8) are attached to the respective tips.

Therefore, the ground height of the rear axle case (8) (8) attached to the tip of the lower connection frame (30) (30) is lowered, and the lower portion of the frame (30) (30) is placed horizontally between the tips. Vertical frame (32) (32) erected on the connecting horizontal frame (31)
Since the mounting height of the lifting link mechanism (3) can be increased, the lifting operation control of the planting device (2) mounted on the lifting link mechanism (3) can be performed in a stable state.

In addition, as shown in FIG. 4, the left and right lateral widths (w) of the rear ends of the mission case (4) for connecting and supporting 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 side surfaces of the left and right upper connecting frames (34) (34) is also substantially the same as the outer surface distance (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 frame 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, as shown in FIGS. 1 to 4, the lifting link mechanism (3) has a pair of left and right vertical frames (32) (32) at the front end.
An upper link (43) pivotally supported by a support shaft (41) that is erected between the upper parts of the above, and the rear end of which is pivotally supported (43a) connected to the upper part of the planting frame (42) of the planting device (2), The front end is pivotally connected (44a) (44a) to the lower parts of the left and right vertical frames (32) (32), and the rear end is connected to the connecting support shaft (45) which is axially mounted between the lower ends of the planted frames (42). A pair of left and right pivoted lower links (44) (44) form a parallel link, and each lower link (44) (44)
Between the pair of left and right lift arms (46) (46), whose base ends are integrally attached to the front ends of, and between the front ends of the lift arms (46) (46) and the lower rear end of the mission case (4). The lifting cylinder (47) is connected to the inner space (S) of the coupling machine frame (7).
The lift arms (46) (46) have tension reinforcing links (48) (48) interposed between the tips of the lift arms (46) (46) and the connecting support shaft (45).

Moreover, as shown in FIGS. 3 and 4, 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 (44b), and the base end of the bracket (44b) is pivotally supported (44a) to rotate integrally with the lower link (44). Part
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.

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) is moved up through the (44), and conversely, the cylinder rod (47a) is extended so that the planting device (2) is moved down.
(47b) is a tip connecting portion of the cylinder rod (47a).

Therefore, in the lifting cylinder (47), the cylinder rod (47a) is strong against the tensile force and weak against the compression force as compared with the case where the planting device (2) is moved up in conjunction with the extension operation of the cylinder rod (47a). Since the diameter of the cylinder can be significantly reduced and the amount of oil can be small, it can be miniaturized, and further, the coupling machine frame (7) surrounding the lifting cylinder (47) and the like can be miniaturized. The whole can be made compact.

Moreover, the base end of the lifting cylinder (47) is connected (47c) to the lower rear end of the lower connecting frame (30) that is located below the frame front end connecting portion (30a), and the lifting link mechanism (3 ), The height of the lifting cylinder (47) is lowered.

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

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 rotation fulcrum position of the lower links (44) (44) is set as low as possible, the rice transplanter body (1) is improved in safety 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 it is connected by a pair of left and right straight lower connecting frames (30) (30) that make up the lower part of the frame, bending and torsional rigidity can be easily secured by the same frames (30) (30). The structure can be simplified and the weight of the machine can be reduced.

Since the planting device (2) is connected to the vertical frames (32) (32) which are erected at the tips of the connecting frames (30) (30) through the lifting link mechanism (3), The device (2) can be reliably supported.

The base end of the lifting cylinder (47) that lifts and lowers the planting device (2) is connected to the front end connecting portion (30) of the lower connecting frames (30) (30).
Since it is mounted on the mission case (4) so as to be located below a) (30a), the lifting cylinder (47) can be easily mounted and removed.

Since the lifting cylinder (47) is arranged at the lower center of the front and rear wheels (6) and (9), the body balance is good, and the running safety and work stability are excellent. Will be things.

[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 continuous machine frame. FIG. 6 is a side view of the steering gear box. FIG. 7 is a sectional view taken along line I-I of FIG. 6. FIG. 8 is a perspective view of the midway part support structure of the planted transmission shaft. FIG. 9 is an explanatory diagram of a conventional structure. (A): Riding rice transplanter (1): Rice transplanter main body (2): Planting device (3): Lifting link mechanism (4): Mission case (5): Front axle case (7): Frame of connecting machine (8) ): Rear axle case (30): Lower connecting frame (30a): Frame front end connecting part (32): Vertical frame (37): Lifting cylinder

Claims (1)

[Scope of utility model registration request] 1. A self-propelled rice transplanter main body (1) having a mission case (4) connected to a connecting frame (7) having a trapezoidal shape in a side view, the connecting frame (7) including the mission case (4). ) A pair of left and right lower connecting frames (30) (30) are connected to the lower rear from the rear end, and the same connecting portion is connected to the front end of the frame (30a).
(30a) and the lower connecting frame (30) (3
The lower connecting horizontal frame (31) is horizontally connected between the rear ends of the (0) and the left and right vertical frames (32) (32) on the lower connecting horizontal frame (31).
Standing upright, and connecting the upper connecting horizontal frame (33) horizontally between the upper ends of the vertical frames (32) and (32), and further connecting the vertical frame (32).
A pair of left and right upper connecting frames (34) are provided between the upper part of (32) and the rear upper and left side walls of the mission case (4).
(34) is constructed by being installed in a front-rear-rear-high inclined shape, and furthermore, an elevating link mechanism (3) for elevating the planting device (2) is attached to the vertical frames (32) (32). At the same time, the base end of the lifting cylinder (47) for operating the lifting link mechanism (3) is connected to the frame front end continuous portion (30
a) A passenger rice transplanter characterized by being attached to the mission case (4) at a position lower than (30a).