JP3335328B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as a riding rice transplanter, for example, Japanese Utility Model Application Laid-Open No. 63-125620 and Japanese Patent Application Laid-Open No. 58-43864.
Is described in Japanese Patent Application Publication No.

That is, the former (Japanese Utility Model Application Laid-Open No. 63-12562)
No. 0), an engine is mounted on a front portion of a body frame, a transmission case is arranged behind and below the engine, and the transmission case and the engine are interlocked and connected via a transmission mechanism. It describes a structure in which a steering shaft is erected at a front portion of a transmission case, a steering handle is attached to an upper portion of the steering shaft, and a seat is arranged at a position rearward of the steering handle.

In the latter case (JP-A-58-43864), a transmission case is disposed at the front end of an airframe, and an engine is mounted on the transmission case.
A transmission mechanism is interposed between the engine and the transmission case, a fuel tank is mounted on the engine, a steering shaft is erected from the body frame at a position behind the engine, and a steering shaft is mounted on the upper part of the steering shaft. A structure is described in which a steering wheel is attached, a seat is disposed at a position behind the steering handle, and a lifting fulcrum of the lifting link mechanism is disposed behind and below the seat.

[0005]

However, in the former rice transplanter described above, since the engine is arranged in a state of being offset more forward than the transmission case, the body protrudes forward accordingly. In this state, the aircraft cannot be made more compact, and it is difficult for a worker who works in a field while sitting on a seat and performing a steering operation to see the front and lower field scenes. There is a problem that operability in work cannot be ensured satisfactorily.

[0006] In the latter riding rice transplanter, a fuel tank and a transmission in which a steering shaft is disposed at a position rearward of a transmission case, and a steering handle mounted on an upper portion of the steering shaft is disposed above the transmission case. The seat does not overlap with the case in the vertical direction, i.e., it is located rearwardly away from the fuel tank. It will be located further away from the tank and the transmission case, as a result
There is a problem in that the front-rear width of the traveling section becomes longer, the overall length of the body from the front end of the traveling section to the rear end of the planting section becomes longer, and the turning radius of the body becomes larger.

[0007]

Therefore, according to the present invention, an engine, a transmission case and a fuel tank are mounted at the front of the fuselage, front and rear wheels are provided at the front, rear, left and right of the fuselage, and the plant is mounted at the rear of the fuselage via a lifting link mechanism. In a riding rice transplanter in which the attachment portions are connected so as to be able to move up and down, the front portion of a pair of left and right lower frames is connected to the transmission case, and the upper frames are arranged and connected at positions above both lower frames. And an upper and lower integrated frame of the lower frame, and the rear end of the lower frame is shifted rearward from the upper frame, and extends rearward from the rear of the lower frame and the middle of the lower frame. The rear part of the inclined rear frame is integrally connected to the rear side frame of the rear view portal type, and the left and right rear frames are The left and right widths of the lower frame are spaced apart from each other, and are located between the left and right upper frames.The middle horizontal frame connected to the upper frame is connected to the middle position of the lower frame. The frame is disposed between the front and rear wheels, and the rear axle case having a high front and rear is integrally connected to a rear portion of the lower frame at a position below the rear horizontal frame. The left and right rear wheels are attached to the rear axle, the engine is arranged vertically above the transmission case at the front upper position of the transmission case, and the fuel tank is arranged above the engine in a side view. The transmission case, engine and fuel tank are vertically overlapped, and the engine and fuel tank are covered with a bonnet. An operation member is disposed at a side position, and an operation pedal is disposed at a side position. At a position above a rear portion of the transmission case, a space formed by the rear portion of the engine, the rear portion of the transmission case, the rear portion of the fuel tank, and the operation member. The lower part of the linearly formed steering shaft is disposed inside the steering shaft, and the steering shaft is arranged vertically overlapping with the rear part of the transmission case, and a steering handle is attached to the upper part of the steering shaft. An object of the present invention is to provide a riding rice transplanter characterized in that a steering shaft is arranged within a front-rear width of a steering handle.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (A) shows a riding rice transplanter according to the present invention.
The planting part (C) is connected to the rear of the wing via a lifting mechanism (D).

As shown in FIG. 1, the traveling section (B) has upper frames (1) and (1) located in the front-rear direction on both sides of the fuselage, protruding forward and at a high position. 1) A transmission case (5) is arranged at the front of (1) so as to protrude downward, and the engine (2) is vertically overlapped with the transmission case (5) at the front upper position in side view. Engine pulley, which is arranged in the state and is provided at the side position of the engine (2)
(28) and the transmission pulley (29) provided at the side position of the transmission case (5) are arranged at positions overlapping in the vertical direction, and both pulleys (28) (29) are Linked with (30).

A fuel tank (4-1) is disposed above the engine (2), and the transmission case (5)
And the engine (2) and the fuel tank (4-1) are vertically overlapped in a side view, and the fuel tank (4-1)
The front end of the fuel tank (4-1) is arranged so as to be displaced rearward from the front end of the engine (2), and the front wall of the fuel tank (4-1) is formed to be inclined downward and forward, and the engine ( 2) and the fuel tank (4-1) are covered with a bonnet (4).

In addition, the front wall of the hood (4) is formed in a substantially quarter-arc shape that is inclined downward and forward and swells forward in a side view. With the rear end of the transmission case (5) positioned directly below and near the bonnet (4), a shift lever (33) as an operating member is provided immediately behind the hood (4), and an operation pedal is provided at the side position. Brake pedal (64) is arranged.

In addition, a transmission pulley (29) is provided at a lateral position at the front of the transmission case (5), and front axle cases (6) and (6) are interlocked with the rear left and right sides of the transmission case (5). The front wheels (7) and (7) are connected to the front axle cases (6) and (6) via the front axles (7-1) and (7-1).
And a rear axle case at the rear of the fuselage.
The rear axle (8) is mounted on the rear axle case (8) via rear axles (15), and the left and right rear wheels (9) and (9) are mounted on the rear axle case (8).

In FIG. 8, (6-1) is a front gear case connected to the outside of the front axle case (6), and (6-2) is a connection flange of the front gear case (6-1). An extension (6-3) is provided above.

The front axle case (6)
It is fixed to the upper bracket (1) by a mounting bracket (26) having a reverse L-shaped cross section and a bolt (27).

As a result, the load from the front wheel (7) can be supported by the mounting bracket (26), and the rigidity of the transmission case (5) and the front axle case (6) can be reduced. Can be made compact and lightweight.

In addition, since the connecting flange (6-2) is not fastened together, it can be easily disassembled.
Also, no oil leakage or the like occurs from the bolt holes.

Further, the fuel tank (4-1), the engine (2) and the transmission case (5) are arranged on a virtual vertical line (V) passing through the front axle (7-1) in a side view. , Mission case
(5) is disposed above the front axle (7-1).

The engine (2) and the fuel tank (4-1) disposed above the engine (2) are covered with a hood (4), and the front wall of the hood (4) is It is formed in a substantially quarter arc shape that is inclined downward and downward and swells forward in a side view.

Here, the fuel tank (4-1) is connected to the engine (2)
In the upper position, the front end is displaced rearward from the front end of the engine (2), and the front wall is formed to be inclined downward and forward.

In this manner, the hood (4) is compactly formed in a substantially quarter arc along the front wall of the fuel tank (4-1) and the front end of the engine (2). .

Further, the front end of the transmission case (5) is located at a position behind the virtual tangent (L) of the front wheel (7) connecting the front end of the fuselage and the front side of the front wheel (7).
(4) The rear end of the transmission case (5) is located immediately below the rear end of the transmission case (5), and a speed change lever (33) as an operating member is disposed immediately after the bonnet (4). A clutch pedal (63) and a brake pedal (64) as operation pedals forming a part of the driving section (60) are arranged at the left and right lateral positions of 4). In addition, virtual tangent (L)
And the running surface (G) form a so-called nose angle (θ).

The rear part of the transmission case (5) is located above the rear part of the engine (2), the rear part of the transmission case (5), the rear part of the fuel tank (4-1) and the rear part of the engine (2). The lower part of the steering shaft (3) is arranged in a space (S) formed by the transmission lever (33) as the operating member, and the steering shaft (3) is located between the rear part of the transmission case (5) and the rear. Arranged vertically in an overlapping state, and a steering handle is located above the steering shaft (3).
(3-1) is attached, and the front part of the steering handle (3-1), the transmission case (5), and the fuel tank (4-1) are vertically overlapped.

The steering shaft (3) is formed in a straight line and disposed within the front and rear width of the steering handle (3-1).
The front part of 1), the rear part of the transmission case (5) and the rear part of the fuel tank (4-1) are vertically overlapped, and
The transmission belt (30), the transmission case (5), and the steering shaft (3) are arranged between substantially front and rear ends of the front wheels (7).

Here, a transmission belt (3) is provided between an engine pulley (28) provided on the left side of the engine (2) and a transmission pulley (29) provided on the left side of the transmission case (5).
(0) is wound around and linked to the engine pulley (2
8) is disposed above a casing (31) that also serves as a step, which will be described later, and the transmission pulley (29) is
(31), the transmission belt (30) is arranged on a substantially same vertical line close to the virtual vertical line (V) passing through the front axle (7-1), and in a side view, The engine (2) and the transmission case (5) are arranged at positions overlapping in the vertical direction.

Further, a seat (61) is provided at a position behind the steering handle (3-1) to constitute a driving unit (60).

That is, as shown in FIGS. 1 and 2, the driving section (60) is provided with a seat (6) above a casing body (31) described later.
1), and the planting elevating lever (62) is located on the right side of the seat (61).
On the other hand, a clutch pedal (63) and a brake pedal (64) as operation pedals are arranged at left and right side positions of the hood (4), respectively.
4) is formed by a left pedal (64-1) and a right pedal (64-2). (65) is an auxiliary speed change lever.

The seat (61) is disposed at a position rearward of the steering handle (3-1) and above a rear frame (13), which will be described later.
(7) It is arranged between (7) and the rear wheels (9) (9).

The rear end (1) of the lower frame (10), which will be described later, is located near the lower portion of the rear portion of the seat (61).
0-3) At a position forward of (10-3), the lifting pivot mechanism of the lifting link mechanism (35) forming a part of the lifting mechanism (D), that is,
A fulcrum shaft (37-1) and a fulcrum pin (47) described later are arranged.

The transmission case (5) is connected to the front portions of a pair of left and right lower frames (10) extending in the front-rear direction, and is located above the lower frames (10) (10) in the front-rear direction. By disposing and connecting a pair of left and right upper frames (1) (1) extending to the upper frame (1) (1) and the lower frame (10) (10) That is, it constitutes the body frame (F).

In addition, the rear ends (10-3) and (10-3) of the lower frames (10) and (10) are shifted rearward from the upper frames (1) and (1), so that both lower frames (10 ) (10) rear end (10-3) (1
0-3) and the rear part of the inclined rear frames (13) and (13) extending rearward from the middle of the lower frames (10) and (10) as one unit with the rear lateral frame (11). Are connected.

Further, the left and right rear frames (13) and (13)
The left and right upper frames (1) and (1)
A frame shape having an upwardly inclined slope rearward by an inclined rear frame (13) (13), a lower frame (10) (10), and a rear view frame-shaped rear horizontal frame (11). And a seat (61) is supported by the frame structure so that the front end of the seat (61) is located above the rear end of the front wheel (7).

At a position below the rear horizontal frame (11), the rear axle cases (8) and (8) having a front height and a rear low are integrally connected to the rear portions of the lower frames (10) and (10). (8) The rear axle (15) (15) is supported at the rear of (8),
Left and right rear wheels (9) (9) are attached to the rear axles (15) (15).

The rear axle (15) is a rear axle case.
It protrudes from both sides of (8) and is connected and supported by the lower end of the rear horizontal frame (11).

Here, the front end (10-1) of the lower frame (10)
Is connected to a front horizontal frame (10-2) provided laterally in the center of the fuselage while curving inward to approach the narrow width. (10-4) is a front lower frame extending forward of the lower frame (10).

At the intermediate position in the front-rear direction of the lower frames (10), (10), the vertical portions (12-
1) At (12-1), the rear ends of the left and right upper frames (1) (1-1) (1
-1) and the connected intermediate horizontal frame (12),
Place the middle horizontal frame (12) between the front and rear wheels (7) (9) and seat
It is located below (61).

A transmission mounting frame (10-5) is provided at the front portion of the upper frame (1) in the lateral direction.
Reference numeral 0-6) denotes an engine mounting frame provided in the front part of the upper frame (1) in a lateral direction.

The upper frame (1) is provided with spare seedling mounting frames (10-7) at both left and right front portions. (10-8) is the support frame for the differential lock lever, (10-
9) is a step support frame that supports the step center. (13) is a rear frame provided in an inclined manner rearward and upward from both left and right positions of the front horizontal frame (10-2), and a rear end (13-1) is provided above the rear horizontal frame (11). Are linked.

The rear axle case (8) is connected to the transmission case (5) via a propeller shaft (14) while being connected to the left and right rear portions of the lower frame (10).

(16) is a planting drive shaft for interlocking the transmission case (5) of the traveling part (B) of the rice transplanter and the planting drive case (17) of the planting part (C).

The planting drive shaft (16) has the front drive shaft (16-1) and the rear drive shaft (16-2) interlockingly connected via a universal joint (18). The rear drive shaft (16-2) is the outer tube shaft
(16-3) and the inner pipe shaft (16-4) are spline-fitted to extend and retract, and the inner pipe shaft (16-4) is attached to the planting drive case (1).
It is linked to 7).

Further, (19) is arranged above the transmission case (5) and the steering shaft (3)
This is a steering case in which a steering handle (3-1) is interlocked and connected via a speed reduction gear (19-1). Reference numeral (20) denotes a pitman arm shaft projecting downward below the steering case (19), and a pitman arm (21) is connected rearward to a lower end of the pitman arm shaft (20). The bases of the drag rods (22) and (22) are connected to the left and right sides of the pitman arm (21), and the knuckle arms (24) and (2) of the left and right front gear boxes (23) and (23) are connected.
It is linked to 4).

The pitman arm shaft (20), pitman arm (21), drag rods (22) and (22), knuckle arms (24) and (24), and a steering interlocking mechanism (25)
The steering interlocking mechanism (25) is shown in FIG.
As shown in (2), it is arranged so as to detour from behind the mission case (5).

(26) mounting brackets projecting downward from both sides of the front of the upper frame (1), to which the transmission case (5) is fixed. (27) is a fixing bolt.

Then, a casing body (31) serving also as a step.
Is formed on the upper surface of the upper frame (1) to have a wide width.The casing body (31) has a rear portion integrally connected to the rear fender (32), and has a floor surface and a transmission guide plate. It is made of a synthetic resin having high rigidity such as FRP in order to use the same.

The transmission lever (33) is connected to the transmission case (5).
And is located near the steering column (34).

The lifting mechanism (D) includes a lifting link mechanism (35) and a lifting hydraulic cylinder (38). The lifting link mechanism (35) includes a rear portion of the lower frame (10) and a rear horizontal frame.
(11) Link support bracket (36) diagonally extended
The base of a pair of left and right lift arms (37) is pivotally supported, and the front end of the lift link (40) is connected to the upper support shaft (39) of the lift arm (37), while the rear end is connected to the planting frame ( It is pivotally supported on a horizontal axis (42) provided at the front of 41). (43) is a lower link for linking the running part (B) and the planting part (C) in an interlocking manner. ) While the rear end is planted frame (41)
It is pivotally supported on a horizontal axis (42) provided at the front of the vehicle.

The elevating link mechanism (35) is provided with a top link (44) in a bridging manner between a rear portion of the rear frame (13) and a vertical frame (45) provided on the planting frame (41). The top link (44) has a bifurcated (44-1) front end as shown in FIG. (46) is a mounting seat, (47) is a fulcrum pin, and (48) is a top link pin.

Here, the fulcrum shaft (37-1), the fulcrum pin (47) and the rear ends of the upper frames (1) and (1), which are the fulcrum of the elevation link mechanism (35), are viewed from the side. And supported within a frame-like frame structure.

The above-mentioned top link (44) and lower link
(43), the lift arm (37) and the vertical frame (45) constitute a parallel link mechanism (49).

The lifting hydraulic cylinder (38) is provided with a lower frame.
The base (38-1) is pivotally attached to the front horizontal frame (10-2) provided in (10), and the tip is the upper support shaft (39) of the lift arm (37).
It is connected to. (37-1) is a fulcrum axis.

The lifting hydraulic cylinder (38) operates the cylinder rod (38-2) in a shortened manner to rotate the lift arm (37) forward, and the planting portion (C) is moved by the lift link (40). ) Is raised.

Conversely, by extending the cylinder rod (38-2) of the lifting hydraulic cylinder (38), the planting portion is
(C) is operated to descend.

In FIG. 6, reference numeral (50) denotes a fixed plate provided at the base of the steering column (34).
(19) is fixed by bolts (51).

A support plate (52) for supporting the lower side of the steering case (19) is connected to the front horizontal frame (10-2) via a mounting bracket (53). (54) is a fixing bolt. (55) is a vertical frame integrally connected to the front horizontal frame (10-2), which has a mounting seat (56) for a lifting hydraulic cylinder (38) at a lower portion and a pedal shaft support portion ( 57).

As described above, the fuselage frame (F) is composed of an upper frame (1) located on the upper side and a lower frame (10) located on the lower side in two upper and lower stages. At the very least, the engine (2) is mounted, the lower frame (10) is shifted backward from the upper frame (1), and the transmission case (5) is connected. The lower frame (10) and the lower frame (10) are integrally connected by an intermediate horizontal frame (12), so the shape of the body frame (F) is a box-shaped structure, the rigidity is greatly increased and the engine (2) And the transmission case (5) can be securely held.

The body frame (F) is composed of upper and lower upper frames (1) and a lower frame (10), and the right and left rear frames are inclined upward and rearward from the lower frame (10). The rear end of the left and right rear frame (13) is connected to a rear horizontal frame (11) formed in a rear view portal shape, and a rear horizontal frame (11) formed in the same gate shape is provided. Since the lifting link mechanism (35) is located inside of (11), the rigidity of the fuselage frame (F) increases, and the load on the axle is supported by the portal-shaped rear horizontal frame (35) over a wide span. The weight of the fuselage frame (F) can be reduced, and the lifting link mechanism (35) is arranged in the space inside the rear horizontal frame (11) of the gate.
(F) and the lifting link mechanism (35) can be made compact.

Also, each part of the lifting link mechanism (35) can be protected by the rear horizontal frame (11) of the gate shape,
The lifting operation can be performed reliably.

The embodiment of the present invention is configured as described above. According to this embodiment, the following operations and effects can be obtained.

In this embodiment, a transmission case (5) is arranged at the front of the traveling section (B), and the front end of the transmission case (5) is connected to the front end of the traveling section (B) and the front wheels (7). The rear wheel is located behind the virtual tangent (L) of the front wheel connecting the front end of the vehicle, so that the mission case (5) is less likely to collide with ridges during work or when entering or leaving the field, The case (5) can be prevented from being damaged.

In the present embodiment, the transmission case (5) is disposed at the front of the traveling section (B), and the engine (2) is disposed above the front of the transmission case (5) in a side view. Then, a transmission mechanism (80) is provided between the engine (2) and the transmission case (5), and a fuel tank (4-1) is disposed above the engine (2). The transmission case (5), the engine (2) and the fuel tank (4-1) are vertically overlapped with each other, and a steering shaft (3) is formed linearly above the rear of the transmission case (5). The steering shaft (3) and the rear of the transmission case (5) are vertically overlapped with each other.
Attach the steering handle (3-1) to the upper part of (3) and arrange the steering shaft (3) within the front and rear width of the steering handle (3-1). -1) Front and above mission case
(5) and the fuel tank (4-1) are not overlapped in the vertical direction,
Further, a transmission mechanism (80), a transmission case (5), and a steering shaft (3) are arranged between substantially front and rear ends of the front wheel (7).

In this manner, the transmission case (5), the engine (2), the fuel tank (4-1), and the linearly formed steering shaft (3) are compactly arranged in the front-rear direction. And the center of gravity of the traveling section (B) can be moved forward, and the planting section (C), which is a heavy material, is connected to the rear of the traveling section (B). A) The balance between the center of gravity in the front and rear and the running stability can be satisfactorily secured.

Further, by configuring as described above, the amount by which the front portion of the traveling portion (B) projects forward from the front end of the front wheel (7) can be made as small as possible. The front and rear width of the traveling section (B) can be shortened, and a worker who works on a field while performing a steering operation while sitting on the seat (61) can view the front lower field scene. As a result, it becomes possible to visually recognize the work more easily than before, and as a result, it is possible to ensure good operability in work. Further, since the front and rear width of the traveling portion (B) can be reduced, the weight of the aircraft can be reduced.

Further, a steering shaft is provided in a space (S) formed by a rear portion of the engine (2), a rear portion of the transmission case (5), and a shift lever (33) disposed at a position rearward of the engine (2). (3), the steering shaft (3) is arranged vertically overlapping with the rear of the transmission case (5), and the transmission mechanism (80) and the transmission case (5) together with the front wheels ( The steering shaft (3) is located close to the engine (2), the transmission case (5), the fuel tank (4-1), and the shift lever (33) because it is located between the front and rear ends of the The steering shaft (3) can be positioned forward compared to the conventional model, and the steering handle (3-1) attached to the top of the steering shaft (3) also moves forward. Can be located.

Therefore, the distance from the steering handle (3-1) to the front end of the fuselage can be made as short as possible.
From this point, the worker who works in the field while performing the steering operation while sitting on the seat (61) can more easily visually recognize the front and lower field scene as compared with the related art,
As a result, good operability in work can be ensured.

Also from this point, the front-rear width of the traveling portion (B) can be reduced, and the entire body can be made compact and lightweight.

Since the transmission mechanism (80) is disposed between the front and rear ends of the front wheels, the transmission mechanism (80) is disposed in front of the conventional engine (2) and the transmission case (5). The length of the front part of the running part (B) projecting forward from the front end of the front wheel (7) can be made shorter than that of the running part.

Accordingly, also from this point, the front-rear width of the traveling portion (B) can be shortened, and the riding rice transplanter (A) can be made compact and lightweight, and the seat (61) can be reduced. ), The worker who works in the field while performing the steering operation can more easily see the front and lower field scene than before, and as a result, the operability in the work Can be satisfactorily secured.

In this embodiment, the transmission mechanism (80) is
Since it is located between the front and rear ends of (7), the transmission mechanism (8
The power transmission path from the engine (2) to the transmission case (5) according to (0) can be shortened, and the power transmission efficiency of the transmission mechanism (80) can be improved.

Further, the transmission mechanism (80) includes an engine pulley (28) provided on the side of the engine (2) and a transmission case.
The transmission pulley (29) provided on the side of (5) is arranged substantially on the same vertical line in side view, and both pulleys (28)
Since the power transmission belt (30) is wound around and interlocked between (29) and the power transmission belt (30) is arranged at a position where the engine (2) and the transmission case (5) overlap vertically, engine
The power transmission path from (2) to the transmission case (5) can be shortened, and the power transmission efficiency can be improved.

Further, the length of the power transmission belt (30) can be shortened, so that the assemblability of the power transmission belt (30) can be improved and the cost can be reduced.

Further, since the front-rear length of the front part of the body on which the engine (2), the transmission case (5) and the transmission belt (30) are arranged can be shortened, the total length of the body is minimized. The operator who can perform the steering operation while sitting on the driving unit (60), while being able to make the storage space good by making it short enough to be able to turn the aircraft smoothly even in narrow places etc. Therefore, it is possible to improve the visibility of the field scene in the lower front, thereby improving the steering operability.

In this embodiment, the engine (2) and the fuel tank (4-1) disposed above the engine (2) are covered with the hood (4), and the front wall of the hood (4) is viewed from the side. Because it is in the shape of a substantially quarter arc that is inclined forward and downward and swells forward, for workers who work in the field while performing steering operation while sitting on the seat (61), The front and lower field scenes can be more easily visually recognized than in the past, and as a result, operational safety and operability can be ensured satisfactorily.

In this embodiment, since the rear end of the transmission case (5) is located just below the rear end of the hood (4), the various operation levers interlocked with the transmission case (5) are connected to the hood (5). (4) It can be arranged near the rear end, and the interlocking mechanism interposed between the various operation levers and the transmission case (5) can be made compact, and the interlocking function of the interlocking mechanism can be realized. As a result, operability of various operation levers can be improved.

In this embodiment, since the shift lever (33) is disposed immediately behind the hood (4) covering the engine (2), the shift lever (33) and the transmission case (5) are arranged.
And the interlocking mechanism interposed therebetween can be made compact, and the interlocking function of the interlocking mechanism can be reliably ensured.

Since the clutch pedal (63) and the brake pedal (64) are arranged on the left and right sides of the bonnet (4), a seat on which a worker sits is provided at a position behind the bonnet (4). It can be placed close to the bonnet (4), and the front and rear width of the traveling section (B) is reduced while maintaining good operability of each pedal (63) (64), making the aircraft compact. Can be planned.

In this embodiment, as described above, the steering shaft (3) can be disposed forward as compared with the conventional case, and the steering handle (3-1) mounted on the upper portion of the steering shaft (3) can be used. A seat (61) including a seat (61a) and a backrest (61b) is disposed at a rear position of the front wheel (7) and the rear wheel (9).
The seat (61) is positioned between the seat (61a) in a substantially horizontal state, and the seat (61b) is pivoted forward around the front end to steer the backrest (61b). Handle (3-1)
The position can be freely changed between a non-use position abutted on the rear part.

Accordingly, as described above, the steering shaft (3) can be disposed forward as compared with the conventional case, and as a result, the seat (61) also maintains a space for ensuring operability and comfort. However, in the non-use position, it can be positioned as far forward as possible until the backrest (61b) comes into contact with the rear of the steering handle (3-1), and the front and rear width of the traveling section (B) The running width (B) can be shortened
Can be reduced in weight.

In the present embodiment, the upper portion, which is the vertical rotation fulcrum of the lifting link mechanism (35), is located near the lower part of the backrest (61b) of the seat (61) arranged as forward as possible as described above. The support shaft (39) and the support shaft (37-1) are arranged.

Therefore, the planting section (C) connected to the lifting link mechanism (35) can be arranged at a position as close as possible to the traveling section (B), and the traveling section ( Together with the shortening of B), the entire length of the aircraft from the front end of the traveling section (B) to the rear end of the planting section (C) can be shortened (compactly) and the The weight can be reduced.

As a result, the traveling performance of the aircraft can be improved, and the turning radius can be reduced.
The aircraft can be turned smoothly.

In the present embodiment, a rear axle case (8) is provided at the rear of the traveling section (B) in a slanted shape with front and rear heights, and a rear axle (15) is provided at the rear of the rear axle case (8). Left and right rear wheels (9) (9) are attached.

Thus, the rear axle case (8)
The rear axle case (8) is attached to the rear part of the rear axle case (8) via the rear axle (15) as compared to the case where the rear axle case (8) is provided in a substantially horizontal state by providing Since the rear wheel (9) can be arranged closer to the front wheel (7), the front-rear width of the traveling portion (B) can be reduced, and the entire body can be made more compact.

[0084]

According to the present invention, the following effects can be obtained.

(1) In the present invention, the front part of the pair of left and right lower frames is connected to the transmission case, and the upper frames are arranged and connected above the lower frames, so that the upper frame and the lower frames are connected to each other. The lower end of the lower frame is shifted rearward from the upper frame, and the rear end of the lower frame and the inclined rear portion that extends rearward from the middle of the lower frame. The rear part of the frame is integrally connected with the rear view frame-shaped rear horizontal frame, and the left and right rear frames are spaced at the same width as the left and right width of the transmission case, and between the left and right upper frames. And the middle horizontal frame connected to the upper frame at the middle position of the lower frame. It is disposed between the front and rear wheels free.

In this manner, the body frame has a frame-like structure, and the rigidity can be greatly increased.

(2) In the present invention, a rear axle case having a front height and a rear low is integrally connected to a rear portion of the lower frame at a position below the rear horizontal frame, and a rear axle is supported by a rear portion of the rear axle case. The left and right rear wheels are attached to the rear axle.

In this way, since the rear axle case is integrally connected to the rear portion of the lower frame, the left and right rear wheels can be reliably supported via the rear axle supported by the rear portion of the rear axle case. .

Further, by providing the rear axle case at an inclination of front high and rear low, the rear wheels mounted on the rear portion of the rear axle case via the rear axle as compared with the case where the rear axle case is provided in a substantially horizontal state. Can be arranged closer to the front wheels, so that the front-rear width of the traveling portion can be reduced, and the overall body can be made more compact.

(3) According to the present invention, the engine is disposed vertically above the front of the transmission case in a side view, and a fuel tank is disposed above the engine. The transmission case, the engine, and the fuel tank are vertically overlapped with each other, and the engine and the fuel tank are covered with a bonnet.

In this manner, the arrangement of the fuel tank, the engine, and the transmission case disposed at the front of the body can be made compact, and the entire body can be made compact.

Further, since the fuel tank, the engine, and the transmission case are disposed at the front of the body, these weights can be applied to the front of the body, and the center of gravity of the entire body can be moved forward. Can be done.

As a result, it is possible to improve the balance between the front and rear centers of gravity of the riding rice transplanter having the relatively heavy planting portion connected to the rear portion, thereby improving the steering operability and the planting operation efficiency. be able to.

(4) According to the present invention, the operating member is disposed at the position immediately behind the hood, and the operation pedal is disposed at the side position. In the space formed by the rear part of the fuel tank and the operating member, the lower part of the linearly formed steering shaft is arranged, and the steering shaft is arranged vertically overlapping with the rear part of the transmission case, The steering handle is attached to the upper part of the steering shaft, and the steering shaft is arranged within the front and rear width of the steering handle.

In this manner, the arrangement of the fuel tank, the engine, the transmission case, and the steering shaft provided at the front of the body can be made compact, and the entire body can be made compact.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter equipped with the present invention.

FIG. 2 is a schematic plan view of the same.

FIG. 3 is a side view of the body frame.

FIG. 4 is a plan view of the same.

FIG. 5 is an explanatory plan view of a steering interlocking mechanism.

FIG. 6 is a side view of the same.

FIG. 7 is a rear view showing the lifting link mechanism.

FIG. 8 is a rear view showing a mounting state of a front axle case portion.

[Explanation of symbols]

 (1) Upper frame (2) Engine (5) Transmission case (7) (7) Front wheel (9) (9) Rear wheel (10) Lower frame (11) Rear horizontal frame (12) Middle horizontal frame (13) Rear frame (35) Elevating link mechanism (C) Planting section (F) Airframe

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-55-131308 (JP, A) JP-A-56-88711 (JP, A) JP-A-58-43864 (JP, A) JP-A 60-88 107463 (JP, A) JP-A-62-187669 (JP, A) JP-A-1-132307 (JP, A) JP-A-57-202327 (JP, U) JP-A-59-196327 (JP, U) 63-125620 (JP, U) 1-82711 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/02 B60K 17/04 B60K 17/06

Claims (1)

(57) [Claims] An engine (2) and a mission card are provided at the front of the fuselage.
(5) and fuel tank (4-1)
Equipped with front and rear wheels (7) (7) (9) (9)
Passenger rice field with the planting section (C) connected up and down freely via the structure (35)
In the planting machine, a pair of left and right lower frames (10) are attached to the mission case (5).
Connect the fronts of (10) and above both lower frames (10) and (10)
Arrange and connect upper frames (1) (1) in position
By the upper frame (1) (1) and the lower frame (10)
(10)
The rear ends of the lower frames (10) and (10)
Rearward from the frame (1) (1), lower frame (10)
(10) at the rear and after the lower frame (10) (10)
And the rear part of the inclined rear frame (13) (13)
The rear side frame (11) is integrally connected with the rear lateral frame (11), and the left and right rear frames (13) (13) are connected to the transmission case (5).
At the same width as the left and right width of
It is located between the upper frames (1) and (1) on the right side, and the upper frame is located between the lower frames (10) and (10).
When the intermediate horizontal frame (12) connected to the
In both cases, the intermediate horizontal frame (12) is placed between the front and rear wheels (7) (9).
In the lower position of the rear horizontal frame (11).
Attach the axle case (8) to the rear of the lower frame (10) (10).
To the rear axle case (8)
The rear axle (15) is supported, and the left and right rear wheels (9) are
Attach (9) and, when viewed from the side, above the front of the transmission case (5)
The engine (2) is installed in the vertical
Install the fuel tank (4-1) above the gin (2)
Transmission case (5), engine (2) and fuel tank (4-
1) and the same engine (2)
Cover the feed tank (4-1) with a bonnet (4)
The operating member (33) immediately after the
An operation pedal (64) is arranged at the rear of the transmission case (5).
Jin rear and fuel tank of the rear (2) and courier Yonkesu (5)
In the space (S) formed by the rear part of the
At the lower part of the steering shaft (3)
And the steering shaft (3) is
The case (5) is placed vertically overlapping the rear of the case (5).
And, steering Han at the top of the steering shaft (3)
Attach the dollar (3-1) and the steering hand
The steering shaft (3) within the front and rear width of the
A riding rice transplanter characterized by the following.