JP2644520B2 - 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, since the transmission case (96) is heavy as described above, it is difficult to mount and remove the transmission case (96).

(D) Means for Solving the Problems Therefore, in the present invention, the coupling machine frame is attached to the transmission case of the self-propelled rice transplanter main body, and the rear axle case is attached to the coupling machine frame. A riding rice transplanter that is connected to a planting device so as to be able to move up and down via an elevating link mechanism, wherein the connecting machine frame extends rearward by a pair of left and right lower connecting frames from rear left and right side walls of a transmission case, The lower connecting horizontal frame is horizontally connected between the front ends of both connecting frames to form a rectangular machine frame in plan view, and a pair of left and right vertical frames are erected on the lower connecting horizontal frame, and The upper connection horizontal frame is horizontally connected between the upper ends to form a machine frame having a rectangular shape in rear view, and a pair of left and right upper portions is provided between the upper portion of each vertical frame and the rear upper left and right side walls of the transmission case. The connecting frame is tilted from low to high To form a rectangular frame in a plan view and a truss-shaped frame in a substantially triangular shape in a side view, thereby forming a three-dimensional box-type frame structure. And a pair of right and left rear axle cases are attached to each other.

(E) Function / Effect According to the present invention, the coupling machine frame is attached to the transmission case without providing the transmission case, and the transmission case and the coupling machine frame can easily secure bending and torsional rigidity. A three-dimensional box-shaped frame having a substantially triangular truss-shaped machine frame is configured, and the planting device is attached to the connecting machine frame via a lifting link mechanism, so that the planting device can be reliably supported. In addition, the structure can be simplified, and the weight of the body can be reduced.

Moreover, since a pair of left and right rear axle cases are mounted on the left and right ends of the lower connecting horizontal frame forming the rear end of the connecting machine frame, the mounting and dismounting of each rear axle case can be performed easily. Maintenance of the rear axle case can be done easily.

(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 body (1) mounts the prime mover section (4 ') on the body frame (a), and connects the front end of the transmission case (4) to the rear end of the body frame (a), Left and right float axle cases (5) and (5) project from the front left and right sides of the transmission case (4).
Attach the front wheels (6) and (6) to (5), and connect the connecting machine frame (7) to the rear end of the transmission case (4). Left and right rear axle cases (8) and (8) are attached, rear wheels (9) and (9) are attached to each case (8) and (8), and an operation unit (4) is provided above the transmission case (4) and the coupling machine 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 shafts (21) and (21) protruding from the left and right sides of the center of the transmission case (4), and the input shafts (22) and (22) of the left and right rear axle cases (8) and (8). A transmission shaft interposed between the two.

As shown in FIGS. 3 to 5, the connecting machine frame (7) includes a pair of lower connecting frames (30) (30) (30) (30) which are inclined downward and rearward from rear left and right side walls of the transmission case (4). , And a lower connecting horizontal frame (31) is horizontally connected between the distal ends of the connecting frames (30) (30) to form a rectangular machine frame in plan view, and the lower connecting horizontal frame (31) A pair of left and right vertical frames (32) and (32) are erected on the left and right, and an upper connecting horizontal frame (33) is connected horizontally between the upper ends of the vertical frames (32) and (32). A frame is formed, and between the upper portions of the vertical frames (32) and (32) and the rear upper left and right side walls of the transmission case (4),
A pair of left and right upper connecting frames (34) and (34) are erected in a front-to-back and rear-to-back inclining shape to form a rectangular-shaped machine frame in plan view and a truss-shaped machine frame in substantially triangular shape in side view. Thus, a three-dimensional box-type frame structure is provided. (30a) is a front end connecting portion of each connecting frame, and (34a) is a front end connecting portion 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 machine frame (31)
Since the height at which the elevating link mechanism (3) is attached to the lowering mechanism can be reduced, the elevating operation of the planting device (2) attached to the elevating link mechanism (3) can be regulated 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 upper left and right connecting frames (34) and (34) is also substantially the same as the width between the outer surfaces (W ') of the lower left and right connecting frames (30) and (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 placed between the distal ends of a pair of left and right lift arms (46) (46) having the base end integrally attached to the front end of (44) and the lower rear end of the transmission case (4). A tension reinforcing link (48) (48) is provided between the tip of the lift arm (46) (46) and the connecting support shaft (45), and is interposed in the internal space (S) of the connecting machine frame (7). Is configured.

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.

Then, the lower links (44) and (44) of the lifting link mechanism (3) can be moved up and down in the non-interference space (S ') (S') so that the left and right lower links (44) can be moved up and down.
The spacing of (44) is widened, and the front end mounting position of the lower links (44) (44), which are pivot points, is 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.

(50) is a transmission case (4) of the rice transplanter body (1) and a planting mission case (5) 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 according to this embodiment, the following operation and effect are produced.

A coupling machine frame (7) having a three-dimensional box frame structure capable of easily securing bending torsional rigidity and the like is attached to the transmission case (4), and the lifting link mechanism (3) is attached to the coupling machine frame (7). Since the planting device (2) is attached through the support, the planting device (2) can be reliably supported.

Since the connecting machine frame (7) has a frame structure, the structure is simple and the assembling work process can be greatly reduced.
The weight of the fuselage can be reduced.

Since the rear axle cases (8) and (8) are attached to the coupling machine frame (7), the attachment of the cases (8) and (8)
It can be easily removed, and the cases (8) and (8) can be easily maintained.

As described above, by disposing the elevating cylinder (47) and the like in the internal space (S) of the highly rigid connecting machine frame (7), the elevating cylinder (47) and the like can be reliably protected. For example, the internal space (S) can be effectively used.

Since the operation lever system and the link system such as the main transmission lever (15) and the planting elevating lever (15 ') can be attached to an arbitrary position by using the highly rigid connecting machine frame (7), these levers can be mounted. The system and the link system can be reliably supported, and can be mounted compactly, thereby reducing manufacturing costs.

[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): Riding rice transplanter (1): Rice transplanter body (2): Planting device (3): Elevating link mechanism (4): Transmission case (8): Rear axle case

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yamamoto Nikichi 1-32 Chaya-cho, Kita-ku, Osaka City, Osaka Prefecture Inside Yanmar Agricultural Machinery Co., Ltd. No. 1 Inside Kanzaki High-Tech Koki Manufacturing Co., Ltd. (56) References JP-A-61-285175 (JP, A)

Claims (1)

(57) [Claims] 1. A self-propelled rice transplanter body (1) having a transmission case (4) attached to a transmission case (4), and a rear axle case (8) (8) attached to the connection case (7). A rice transplanter having a planting device (2) connected to the connecting machine frame (7) via a lifting link mechanism (3) so as to be able to move up and down. The connecting machine frame (7) includes a transmission case ( 4) A pair of left and right lower connecting frames (30) and (30) extend rearward from the rear left and right side walls, and a lower connecting horizontal frame (31) is suspended between the front ends of both connecting frames (30) and (30). Are connected to form a machine frame having a rectangular shape in plan view, and a pair of left and right vertical frames (32) and (32) are erected on the lower connecting horizontal frame (31), and both vertical frames (3
2) The upper connection horizontal frame (33) is horizontally connected between the upper ends of (32) to form a rectangular machine frame in rear view, and the upper part of each vertical frame (32) (32) and the transmission case (4) A pair of left and right upper connection frames (34) and (34) are respectively installed between the rear upper left and right side walls in a front-rear-lower-height inclination to form a machine frame having a rectangular shape in plan view. A three-dimensional box-shaped frame structure is formed by forming a truss-shaped machine frame having a substantially triangular side view, and a pair of left and right rear axle cases (8) (8) ) Is mounted.