JP2000072050A - Transmission case arrangement structure for riding rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the longitudinal center of gravity balance of a riding rice transplanter and to improve a steering property by arranging a transmission case at the lower position of an engine to be at least partially overlapped with the engine, and locating the rear end of the transmission case near directly below the rear end of a hood. SOLUTION: In a riding rice transplanter A connected with a planting section C to the rear via a lift mechanism D, an engine 2 is mounted on the front upper sections of upper frames 1, 1 arranged on both sides of a substrate to form a travel section B. A transmission case 5 is arranged at the lower position of an engine 2 to be at least partially overlapped with the engine 2 in the vertical direction. The transmission case 5 is arranged protrusively below the upper frames 1, 1, and the rear end of the transmission case 5 is located at the position near directly below the rear end of a hood 4. Front axle cases 6 are interlockingly arranged on both the right and left sides of the rear section of the transmission case 5 to connect the right and left front wheels 7-1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission case arranging structure for a rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as an embodiment of a riding rice transplanter, FIG.
As shown in the figure, there is a rice transplanter main body 90 in which a planting device 93 is connected so as to be able to move up and down via an elevating link mechanism 92.The rice transplanter main body 90 has a motor unit 10 mounted on a body frame 99.
0, and a transmission case 94
The front axle cases 101 and 101 are linked and connected at the front left and right positions of the transmission case 94, respectively, and the front wheels 102 and 101 are connected to the front axle cases 101 and 101, respectively.
At the same time, transmission cases 96, 96 are linked and connected at the rear left and right positions of the transmission case 94, and rear wheels 95, 95 are attached to the rear end of each transmission case 96, 96. , 96, a horizontal frame 97 is laid horizontally, a column 98 is erected on the horizontal frame 97, and the lifting link mechanism 92 is attached to the column 98.

[0003]

However, in the above-described riding rice transplanter, the front and rear positions of the center of gravity of the transmission case 94 are located behind the front axle cases 101, 101,
In addition, since the vertical position of the center of gravity is located above the body frame 99, the center of gravity of the rice transplanter main body 90 is located near the upper center, and the front and rear of the entire riding rice transplanter with the planting device 93 connected behind. There is a problem that the balance of the center of gravity is poor.

[0004]

Therefore, according to the present invention, a planting section is connected to the rear of the traveling section, and the traveling section has an engine mounted on a front portion of a body frame, and a transmission case is mounted on the engine. A front axle case is linked to each of the left and right sides of the transmission case, and the front case is attached to each front axle case. Providing a transmission case arrangement structure for a passenger rice transplanter, characterized in that a part of the transmission case is arranged to overlap the engine in the vertical direction, and the rear end of the transmission case is located just below the rear end of the bonnet. It is something you want to do.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, (A) is a riding rice transplanter, and a planting section (C) is provided behind a self-propelled traveling section (B). They are connected via a lifting mechanism (D).

The traveling section (B) has an upper frame (1) (1) positioned in the front-rear direction on both sides of the fuselage, protruding forward and at a high position, and an engine (2) mounted on the upper front. I have. A steering shaft (3) is set up at the rear of the engine (2) and a steering handle (3-1) is set at the top.
Is installed. (4) is the engine (2) and fuel tank (4
-1) Bonnet covering the upper part such as

At a position below the engine (2), as shown in FIG. 1, a transmission case (5) is arranged so that at least a part thereof overlaps the engine (2) in the vertical direction. ), A front axle case (6), (6), and a front axle case (6), (6) are connected to the rear left and right sides of the transmission case (5). ) To the front wheel (7) via the front axle (7-1) (7-1)
(7) Attach the rear axle case to the rear of the aircraft
Rear wheels (9) and (9) are mounted on both left and right sides of the rear axle case (8) with (8) positioned. And the mission case (5) is the upper frame (1)
The hood (4)
The rear end of the transmission case (5) is located immediately below the rear end of the transmission case, and the front end of the front wheel (7) and the front end of the engine (2) are arranged at approximately the same position in side view. .

In this manner, the front and rear positions of the center of gravity of the transmission case (5), which is a heavy object, are positioned forward of the front axle cases (6) and (6), and the upper and lower positions of the center of gravity are 1), the center of gravity of the traveling part (B) is moved forward and downward, and the planting part (C), which is also heavy, is located behind the traveling part (B). By doing so, the balance between the center of gravity and the safety of the riding rice transplanter (A) are well secured, and the steering operability and planting work efficiency are improved.

In addition, by positioning the rear end of the transmission case (5) at a position immediately below the rear end of the hood (4), various operation levers (to be described later) interlocked with the transmission case (5) can be used. 33) The hood (4)
Can be placed near the rear end of the gearshift lever (33)
Operability can be improved.

Reference numeral (10) denotes a lower frame located below the upper frame (1), and the upper frame (1) and the lower frame (10) constitute a body frame (F). The front end (10-1) of the lower frame (10) is connected to the front horizontal frame (10-2) which is provided in the center of the fuselage while curving inward and approaching the narrow width. .

The rear end (10-3) of the lower frame (10)
Is connected to the rear lateral frame (11) in the rear viewing portal shape.
(10-4) is a front lower frame extending forward of the lower frame (10). (12) is located in the horizontal direction of the fuselage and the left and right upper frames at the left and right vertical parts (12-1) (12-1)
This is an intermediate horizontal frame connected to the rear ends (1-1) and (1-1) of (1) and to an intermediate position in the front-rear direction of the lower frames (10) and (10).

A transmission mounting frame (10-5) is provided laterally at a front position of the upper frame (1).
6) is an engine mounting frame provided in the front of the upper frame (1) in a lateral direction. And the same upper frame
At the left and right sides of the front of (1), the frame (1
0-7) is provided. (10-8) is a support frame for the differential lock lever, and (10-9) is a step support frame for supporting the center of the step. (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 connected to an upper portion of the rear horizontal frame (11). Have been.

The rear axle case (8) is connected to the left and right rear portions of the lower frame (10) and is interlocked with the transmission case (5) via a propeller shaft (14). Reference numeral (15) denotes a rear axle projecting from both sides of the rear axle case (8), which is connected to and supported by the lower end of the rear horizontal frame (11).

Reference numeral 16 denotes a planting drive shaft for interlockingly connecting the transmission case 5 of the traveling section B of the rice transplanter and the planting drive case 17 of the planting section C. And such planting drive shaft
In (16), the front drive shaft (16-1) and the rear drive shaft (16-2) are operatively connected via a universal joint (18). Also, the rear drive shaft
The (16-2) has an outer tube shaft (16-3) and an inner tube shaft (16-4) spline-fitted to make it extendable, and the inner tube shaft (16-4) is planted and driven It is linked to the case (17).

A steering case (19) is disposed above the transmission case (5) and is connected to a steering handle (3-1) via an upper steering shaft (3). (19-1) is provided.
Reference numeral (20) denotes a pitman arm shaft projecting downwardly below the steering case (19). A pitman arm (21) is connected to a lower end of the shaft toward the rear. Also, the bases of the drag rods (22) and (22) are connected to the left and right sides of the pitman arm (21), and are linked to the knuckle arms (24) and (24) of the left and right front gear boxes (23) and (23). are doing.

The pitman arm shaft (20), pitman arm (21), drag rods (22) (22), knuckle arms (24) (24), etc.
5) is configured. In addition, the steering interlocking mechanism (25)
Are arranged so as to bypass from behind the mission case (5) as shown in FIG.

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

Reference numeral (28) denotes an engine pulley, and a V-belt (30) is wound around and interlocked with an input pulley (29) of the transmission case (5). (31) is a wide-width step-type casing body located on the upper surface of the upper frame (1), and the casing body (31) has a rear fender (3
It is made of a synthetic resin having high rigidity such as FRP so as to be integrally connected to 2) and to also serve as a floor surface, a transmission guide plate and the like.

Reference numeral (33) denotes a transmission lever projecting above the transmission case (5), which is located near the steering column (34). Reference numeral (35) denotes a lifting link mechanism, and a base of a pair of left and right lift arms (37) is provided on a link support bracket (36) which is obliquely bridged between a rear portion of the lower frame (10) and a rear horizontal frame (11). Is supported. (37-1) is the fulcrum axis, (3
8) is the front horizontal frame (10-2) provided on the lower frame (10)
The base (38-1) is pivotally attached to the
This is a lifting hydraulic cylinder connected to the upper support shaft (39) of (37).

Reference numeral (40) denotes a pair of left and right lift links constituting a lifting link mechanism (35). The lift link (40) has a front end connected to an upper support shaft (39) of a lift arm (37) and a rear end. The end is pivotally supported on a horizontal axis (42) provided at the front of the planting frame (41). (43) is a lower link for linking the running part (B) and the planting part (C) in an interlocking manner. ), The rear end of which is attached to the front of the planting frame (41).
It is pivoted to (42).

(44) is a top link provided in a bridging manner between the rear portion of the rear frame (13) and the vertical frame (45) provided on the planting frame (41). The top link (44) is shown in FIG. As described above, the front end is formed in a forked shape (44-1).

(46) is a mounting seat, (47) is a fulcrum pin, and (48) is a top link pin. And the above top link (44)
Further, a parallel link mechanism (49) is constituted by the lower link (43), the side-by-side lift arm (37) and the vertical frame (45).

The lifting hydraulic cylinder (38) is operated by shortening the cylinder rod (38-2), thereby rotating the lift arm (37) forward and raising the planted portion by the lift link (40). It works.

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

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), and a mounting seat (56) for a lifting hydraulic cylinder (38) is provided below.
And a pedal axle support (57) is provided on the upper part.

In FIGS. 1 and 2, reference numeral (60) denotes an operation unit, and a seat (61) is provided above the casing body (31). (62) is a planting elevating lever provided on the right side of the seat (61),
(63) is a clutch pedal, (64) is a brake pedal, consisting of a left pedal (64-1) and a right pedal (64-2),
(65) is an auxiliary speed change lever.

In FIG. 8, (6) is a front axle case connected to the left and right sides of the transmission case (5), and front gear cases (6-1) are connected to the outside. (6-2) is a connecting flange of the front gear case (6-1), and has an extension (6-3) provided above.

An inverted L-shaped mounting bracket (26) and a bolt (27) are provided on the upper frame (1) in a downward direction.
It is fixed by.

Thus, the load from the front wheels (7) can be supported by the mounting bracket (26), the rigidity of the transmission case (5) and the front axle case (6) can be reduced, and It can be lightweight and compact.

Also, in terms of disassembly and maintenance, the connecting flange (6-2) is not fastened together so that disassembly is easy and no oil leakage or the like is generated from the bolt hole.

As described above, the fuselage frame (F) is constructed in two stages, upper and lower, of the upper frame (1) located on the upper side and the lower frame (10) located on the lower side, and each is protruded from the left and right sides. Equipped with engine, lower frame lower (10)
Is shifted behind the upper frame (1) to connect the transmission case (5), and furthermore, the upper frame (1) and the lower frame (10) are connected to the horizontal frame (12).
The body frame (F) has a box-shaped structure, and its rigidity is greatly increased, so that the engine (2) and the transmission case (5) can be securely held. Things.

Further, the body frame (F) is composed of an upper frame (1) and a lower frame (10) in two stages, and the right and left rear frames (T) are inclined upward and rearward from the lower frame (10). 13), the rear ends of the left and right rear frames (13) are 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. ), The lifting link mechanism (35) is located at the inner position, which increases the rigidity of the fuselage frame (F) and supports the axle load with a wide span by the portal-shaped rear horizontal frame (35). And the weight of the body frame (F) can be reduced, and the lifting link mechanism (35) can be arranged in the space inside the rear horizontal frame (11) of the gate, so that the body frame (F) and the lifting link The 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.

[0035]

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

That is, in the present invention, the transmission case is arranged at a position below the engine mounted on the front portion of the body frame so that at least a part of the transmission case overlaps the engine in the vertical direction. Can be moved forward, and the balance and safety of the front and rear center of gravity of the riding rice transplanter that connects the planting section behind the traveling section can be secured well. As a result, the riding rice transplanter Steering operability and planting work efficiency can be improved.

In addition, since the engine and the transmission case are arranged so as to overlap in the vertical direction, the front and rear length of the traveling section can be shortened, and the riding rice transplanter can be made more compact. Furthermore, since the rear end of the transmission case is located just below the rear end of the bonnet, various operation levers interlockingly connected to the transmission case can be arranged near the rear end of the hood. Operability can be improved.

[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.

FIG. 9 is a side view showing a conventional type.

[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) Horizontal frame (13) Rear Frame (35) Elevating link mechanism (C) Planting section (F) Airframe

Claims (1)

[Claims] 1. A planting section (C) is connected to the rear of the traveling section (B), and the traveling section (B) has an engine (2) mounted on the front of a body frame (F). The transmission case (5) is linked to the engine (2), and the front axle cases (6) and (6) are linked to the left and right sides of the transmission case (5). ) (6) front wheel
(7) In the rice transplanter equipped with (7), the transmission case (5) is arranged below the engine (2) so that at least a part of the transmission case (5) overlaps the engine (2) vertically. A transmission case mounting structure for a riding rice transplanter, wherein a rear end of a transmission case (5) is located just below a rear end of a bonnet (4).