JP2690496B2 - Riding rice transplanter - Google Patents

Description

The present invention relates to a riding rice transplanter.

(B) Conventional technology Conventionally, a rice transplanter described in Japanese Patent Publication No. 57-41885 has been developed.

That is, as shown in FIG. 6, the riding rice transplanter has a planting device (93) connected to a rear of the rice transplanter body (90) via a lifting link mechanism (92) so as to be able to move up and down. The front ends of a pair of left and right transmission cases (96, 96) are connected to the left and right side walls of the transmission case (94) of the rice transplanter body (90), and the rear ends of the transmission cases (96, 96) are connected to the rear ends. Wheel (95)
(95) is attached, and the horizontal machine frame (97) is laid across the middle of the transmission case (96) (96), and the support (98) is mounted on the horizontal machine frame (97).
And an elevating link mechanism (92) is attached to the column (98).

(C) Problems to be Solved by the Invention However, in the case of the above-described riding rice transplanter, the transmission cases (96) and (96), which are power transmission mechanisms to the rear wheels, are moved from the transmission case (94) to the lifting link mechanism (92). ) And the transmission case (96)
The rear wheels (95) and (95) are attached to the rear end of (96),
In addition, the transmission case (96) (96) has a lifting link mechanism (9
Since the heavy planting device (93) is supported via 2), the transmission cases (96) and (96) have rigidity in addition to the power transmission function. Therefore, there is a problem that the transmission cases (96) and (96) are increased in size and weight, and the weight of the entire body is increased.

Moreover, there is a problem that it is difficult to mount and remove the transmission case (96), and it takes time to maintain the transmission case (96).

(D) Means for Solving the Problems Therefore, in the present invention, in the riding rice transplanter in which the planting device is connected to the rear of the self-propelled rice transplanter body so as to be able to move up and down through the lifting link mechanism, Connect the front end of the connecting machine frame to the left and right side walls of the mission case of the rice transplanter body, and attach a pair of left and right rear axle cases to the rear end of the connecting machine frame, and connect each rear axle case to the left and right side parts of the mission case. A pair of left and right transmission shafts extending in the front-rear direction are provided between the transmission shafts, and the transmission shafts are arranged substantially parallel to the outer side of the lower connecting frame. A pair of left and right lower connecting frames that extend rearward from the side walls, a lower connecting horizontal frame that hangs between the rear ends of both lower connecting frames, and a pair of left and right vertical units that are installed upright on the left and right sides of the lower connecting horizontal frame. Frey And a pair of left and right upper connecting frames in which a rear end portion is connected to the support shaft and a front end portion is connected to the rear left and right side walls of the mission case. -Providing a riding rice transplanter characterized by having a three-dimensional box-shaped frame structure by including a reinforcing plate stretched between the front portions of the lower connecting frames.

(E) Action / Effect According to the present invention, the following action / effect is produced.

That is, in the present invention, the left and right side walls of the mission case are connected to the front end portions of the connecting machine frame, and the pair of left and right rear axle cases are attached to the rear end portions of the connecting machine frame, and the rear axle cases and the left and right side portions of the mission case are connected to each other. A pair of left and right transmission shafts extending in the front-rear direction are interposed between the two, and since each transmission shaft is arranged substantially parallel to the outer side of the lower connecting frame, each transmission shaft is transmitted from the outer side of the machine body. Installation and removal of the shaft and each rear axle case can be done easily, and each rear axle case can be easily maintained.

Moreover, the connecting machine frame includes a pair of left and right lower connecting frames extending rearward from the rear left and right side walls of the mission case,
A lower connecting horizontal frame laid horizontally between the rear ends of both lower connecting frames, a pair of left and right vertical frames erected on the left and right sides of the lower connecting horizontal frame, and a support laid horizontally between the upper parts of both vertical frames. Reinforcement stretched between the front part of the upper and lower connecting frames, and a pair of left and right upper connecting frames that connect the shaft and the rear end part to the same support shaft, and the front end parts to the rear left and right side walls of the mission case. It is equipped with a plate, and in particular, the transmission case, the upper and lower connecting frames, and the vertical frame form a trapezoidal machine frame in side view, and the connecting machine frame itself has a three-dimensional box type frame structure. In addition, it is possible to form a support frame that firmly integrates the mission case and the coupling machine frame, and the bending and torsional rigidity are
The structure is simple and can be secured well, and as a result,
The weight of the aircraft can be reduced.

Further, since the pair of left and right transmission shafts described above are arranged substantially parallel to the outer side of the lower connecting frame that constitutes a part of the connecting machine frame described above, external loads such as bending and twisting are applied to the lower part. The connection frame can be loaded so that an external load does not act on each transmission shaft, and the transmission function of each transmission shaft can be well ensured.

(F) Embodiment An embodiment of the present invention will be described in detail with reference to the accompanying drawings. (A) shown in FIGS. 1 and 2 is a riding rice transplanter, which is provided behind a self-propelled rice transplanter main body (1). , The planting device (2) is connected via a lifting link mechanism (3) so as to be movable up and down.

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).
The front wheels (5) and (6) are attached to (5), and the connecting machine frame (7) is connected to the rear end of the transmission case (4). The left and right rear axle cases (8) and (8) are attached, the rear wheels (9) and (9) are attached to the outer cases (8) and (8), and the operation unit (8) is provided above the transmission case (4) and the coupler frame (7). 10) is provided.

The operating unit (10) is provided with a front casing (11) which also serves as a bonnet and a handle column of a motor unit (4 ') at the front, and a handle (12) is mounted on the upper surface of the casing (11). An auxiliary transmission lever (13) protrudes upward on the upper left side surface, and a seat (14) is provided on the coupling machine frame (7) behind the casing (11).
4) Set the main shift lever (15) to the left of
The planting elevating lever (15 ') is arranged on the right side of 4).

In addition, (16) is the floor surface, speed change guide plate, fender,
A seat lower casing integrally molded from a highly rigid synthetic resin such as FRP to double as a seat mounting plate, etc.
The seat (14) is mounted directly on the casing (16).

(17) is a drive shaft provided on the motor unit (4 '), (18) is a passive shaft provided on the rear upper part of the transmission case (4), (1)
9) is a transmission belt wound between the drive shaft (17) and the passive shaft (18).

(20) and (20) are the output side (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). The transmission shafts (20) (20) are interposed between the transmission shafts (20) (20) and are arranged substantially parallel to the outer sides of a pair of left and right lower connecting frames (30) (30) described later.

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 (30), and (34a) is a front end connecting part of the upper connecting frame (34).

And the upper and lower connecting frame (34) facing left and right
(34) (30) Reinforced horizontal axis (35) (3
6), and connect the upper and lower connecting frames (3
4) Reinforcement plate (37) (37) between fronts of (34) (30) (30)
Is stretched out. (S) is an internal space formed by the coupling machine frame (7).

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

Moreover, the lower connecting frame (30) (30)
The rear axle case (8) is attached to each end with a straight pipe having a rectangular cross-section and inclined downward and rearward.

Therefore, the ground height of the rear axle cases (8) (8) attached to the distal ends of the lower connecting frames (30) (30) is reduced so that the lower connecting laterally suspended between the distal ends of the frames (30) (30) is reduced. Vertical frame (32) (32) standing on horizontal frame (31)
Since the mounting height of the elevating link mechanism (3) to the elevating link mechanism (3) can be reduced, the elevating operation control of the planting device (2) mounted on the elevating link mechanism (3) can be performed in a stable state.

Further, as shown in FIG. 4, the left and right lateral width (w) of the rear end of the transmission case (4) for connecting and supporting the front ends of the left and right lower connection frames (30) and (30) is, as shown in FIG. (4) formed narrower than the front width (W),
In addition, the width (W ') between the outer surfaces of the frames (30) and (30) is set to be smaller than the front width (W) of the transmission case (4).

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 surface (W ') of the upper left and right lower connecting frames (30) (30).

The main transmission lever (15) has a base end attached to a left end of a reinforcing horizontal shaft (35) extending between the middle portions of the left and right upper connection frames (34) and (34). The planting elevating lever (15 ') is connected to the upper connecting frame (3
4) Mounted on the lever support shaft (38) projecting more laterally outward.

In addition, the main unit lever (1)
5) The operating system other than the planting elevating lever (15 ') and the fulcrum of the interlocking link system interlockingly connected to these levers can be freely provided without interfering with other members.

The rear ends of the upper connection frames (34) and (34) are fixed to the upper inner walls of the vertical frames (32) and (32), respectively. A spindle (41) that pivotally supports the front end of the upper link (43) of (3).
Is suspended between the upper portions of the vertical frames (32) and (32).

Therefore, the vertical frames (32) and (32) to which a tensile force acts via the upper link (43) can be reinforced by the upper connection frames (34) and (34).

In addition, the transmission shafts (20), (20) are provided on the outer side of the lower connecting frames (30), (30) in the same frame (3
0) and (30), and are provided on a line connecting the output shaft (21) of the transmission case (4) and the rear axles (9a) (9a).

Further, the lifting link mechanism (3) includes a coupling machine frame (7).
Are interposed between the vertical frames (32) and (32) 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) (3
2) pivotally supported on a support shaft (41) suspended between the upper portions, and the rear end is pivotally mounted on the upper part of the planting frame (42) of the planting device (2).
a) Connect the upper link (43) and the front end to the lower parts of the left and right vertical frames (32) (32) by pivoting (44a) (44a),
A pair of left and right lower links (44) (4) pivotally supported at the rear end on a connection support shaft (45) suspended between the lower ends of the planting frame (42).
4) and form a parallel link, each lower link (44)
An elevating cylinder (47) is provided between the front ends of a pair of left and right lift arms (46) (46), whose base ends are integrally attached to the front ends of (44), and the lower rear end of the mission case (4). The tension reinforcing links (48) (48) are provided in the internal space (S) of the connecting machine frame (7) and are provided between the tip of the lift arms (46) (46) and the connecting support shaft (45). It is configured by interposing.

Further, as shown in FIGS. 3 and 4, the lower link (44) is located outside the vertical frame (32), and the link support bracket protrudes from the lower front surface of the vertical frame (32). (44b) pivotally supports the front end (44a), and the bracket (44b) has a base end pivotally supported (44a) to rotate integrally with the lower link (44). With the front end of the tension reinforcement link (48) located inside the vertical frame (32) at the tip of the lift arm (46), and the lifting cylinder With the tip of the cylinder rod (47a) of (47),
7b) They are linked. (54) The left and right lower links (44)
Reference numeral (44) denotes a reinforcing horizontal frame which is horizontally connected between the front portions, and (55) denotes a reinforcing horizontal frame which is horizontally connected between the middle portions of the tension reinforcing links (48) and (48).

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

In addition, the lifting cylinder (47) is operated by shortening the cylinder rod (47a), thereby increasing the lift arm (4).
6) Rotate (46) forward and downward to connect the upper and lower links (43).
(44) Raise the planting device (2) via (44),
Conversely, by extending the cylinder rod (47a), the planting device (2) can be lowered. (47b) is a tip connecting portion of the cylinder rod (47a).

Therefore, the lifting cylinder (47) is strong in the tensile force and weak in the compressing 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). The size of the connecting machine frame (7) and the like surrounding the elevating cylinder (47) can be reduced by reducing the diameter of The whole can be made compact.

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

Therefore, the lifting cylinder (47) is connected to the front and rear wheels (6) (9).
Since it is disposed at a substantially central portion and at a low position, the body balance is improved, and the running stability and work stability are excellent.

Further, the rear axle cases (8) and (8)
As shown in FIG. 2 and FIG. 3, it is connected to connecting plates (31a) (31a) provided at both ends of the lower connecting horizontal frame (31), and the inner wall ( 8a) (8a) is notched from the vicinity of the connection with the lower connection horizontal frame (31) to the rear end, and the lower part of the lifting link mechanism (3) is placed inside the case (8) (8). A non-interference space (S ') (S') with the links (44) and (44) is formed.

The lower links (44) (44) of the lifting link mechanism (3) can move up and down in the non-interference spaces (S ') (S'), so that the left and right lower links (44) (4)
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).

Since the non-interference spaces (S ′) and (S ′) are formed inside the rear axle cases (8) and (8), the right and left lower links (44) and (44) have straight corners. Even if a pipe is used, the distance between the lower links (44) and (44) can be widened without interfering with the rear axle cases (8) and (8). Rigidity against torsional action can be increased.

In addition, since the rotation fulcrum positions of the lower links (44) and (44) are as low as possible, the stability of the rice transplanter body (1) is improved, and the overall length of the lower link (44) is shortened. As a result, the planting apparatus (2) can be smoothly moved up and down in a state of being close to the rice transplanter main body (1), and the entire riding rice transplanter (A) can be made compact.

In the planting device (2) shown in FIGS. 1 and 2, (51) is a planting mission case, (52) is a seedling mounting table,
(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).
This is a planting transmission shaft that interlocks and connects with.

And the transmission shaft (50) is a front transmission shaft (50a).
And the rear transmission shaft (50b) are interlocked and connected via a universal joint (50c).

The front transmission shaft (50a) has the front end interlocked and connected to the transmission case (4) in the internal space (S) of the connection device frame (7), and the rear end thereof has the link support bracket (see FIG. 6). It is supported by the shaft support (56) fixed to 44b).

The rear transmission shaft (50b) is configured to be expandable and contractible by spline-fitting the outer tube shaft and the inner tube shaft, and has a front end immediately after the shaft support (56) and a rear end of the front transmission shaft (50a). To universal joint (5
0c), and the rear end is linked to the planting mission case (51).

Therefore, even when the planting device (2) is moved up and down, the rear transmission shaft (50b) is connected to the universal joint (5).
It rotates vertically about 0c) and expands and contracts to secure the power transmission function from the transmission case (4) of the rice transplanter body (1) to the planting mission case (5) of the planting device (2). Is what you can do.

The embodiment of the present invention is configured as described above, and the transmission case (4) and the rear axle case (8) (8) are connected to the lower part of the connector frame (7) having a three-dimensional box type frame structure. Since they are connected by a pair of left and right straight lower connecting frames (30) (30) that constitute them, bending and torsional rigidity can be easily secured by the connecting machine frame (7), and the structure is simplified. The weight of the aircraft can be reduced.

Moreover, 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.
The cases (8) and (8) can be easily maintained.

[Brief description of the 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 a main part. FIG. 5 is a perspective view of a coupling machine frame. FIG. 6 is a perspective view of an intermediate support structure for the planting transmission shaft. FIG. 7 is an explanatory view of a conventional structure. (A): Passenger rice transplanter (1): Rice transplanter body (2): Planting device (3): Lifting link mechanism (4): Mission case (8): Rear axle case (30): Lower connecting frame

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takashi Yamada, No. 32, Chayamachi, Kita-ku, Osaka-shi, Osaka Prefecture Yanmar Agricultural Machinery Co., Ltd. (72) Nikyo Yamamoto, No. 1, Chaya-machi, Kita-ku, Osaka-shi, Osaka No. 32 in Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Hiroshi Kitagawara 2-18-1 Inadera, Amagasaki City, Hyogo Prefecture Kanzaki High-grade Machinery Works Co., Ltd. (56) Reference JP-A-61-285175 (JP, Sho A)

Claims (1)

(57) [Claims] 1. A riding rice transplanter comprising a self-propelled rice transplanter main body (1) and a planting device (2) connected to the rear of the rice transplanter main body (1) via an elevating link mechanism (3) so as to be movable up and down. The front end of the connecting machine frame (7) is connected to the left and right side walls of the mission case (4) of (1), and the pair of left and right rear axle cases (8) is connected to the rear end of the connecting machine frame (7).
(8) is attached, and a pair of left and right transmission shafts (20) (20) extending in the front-rear direction are provided between the rear axle cases (8) (8) and the left and right side portions of the transmission case (4). In addition, the transmission shafts (20) (20) are arranged substantially parallel to the outside of the lower connecting frames (30) (30), and the connecting machine frame (7) is located at the rear of the mission case (4). A pair of left and right lower connecting frames (30) (30) extending rearward from the left and right side walls, a lower connecting horizontal frame (31) extending between the rear ends of both lower connecting frames (30) (30), and the same lower portion. A pair of left and right vertical frames (32) (32) standing on the left and right sides of the connecting horizontal frame (31), respectively, and a support shaft (41) horizontally mounted between the upper portions of both vertical frames (32) (32). , A pair of left and right upper parts in which the rear end is connected to the support shaft (41) and the front end is connected to the rear left and right side walls of the mission case (4). Connecting frame (34)
(34) and upper and lower connecting frames (34) (34) (30)
A riding rice transplanter characterized by comprising a reinforcing plate (37) (37) stretched between the front portions of (30) to form a three-dimensional box frame structure.