JP2000135927A - Transmission case arranging structure of riding type rice-planting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To move a gravity center position of a traveling part to the front and lower side by arranging a transmission case on a virtual vertical line passing through a front wheel shaft in a side view, and arranging the transmission case in an upper position more than the front wheel shaft. SOLUTION: A transmission case 5 is arranged in the shape of projecting downward more than an upper frame 1, the rear end of the transmission case 5 is positioned in a rear end just under side vicinity position of a hood 4, and is also arranged on a virtual vertical line V passsing through a front wheel shaft 7-1 in a side view to be arranged in an upper position more than the front wheel shaft 7-1. Thus, a longitudinal position of the center of gravity of the transmission case 5 is positioned almost on the axis of the front wheel shaft 7-1, upper/lower positions of the center of gravity are positioned below a machine body frame and above the front wheel shaft 7-1, and a gravity center position of a traveling part B can be moved to the front and lower side. Longitudinal gravity center balance and safety of a rice-planting machine A for riding can be improved from this viewpoint.

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 the left and right sides of the transmission case.A transmission rice transplanter with front wheels attached to each front axle case has a transmission case below the engine. At the same time, the transmission case is arranged on a virtual vertical line passing through the front axle in a side view, and is disposed above the front axle, and a fuel tank is disposed above the engine, The engine and the fuel tank are covered with a bonnet, and the front wall of the bonnet is inclined downward and forward in a downward direction in a side view and substantially swells forward. Passenger characterized by a quarter-arc shape, a steering handle located above the bonnet, and the steering handle arranged so that the height of the ground is approximately the same as the upper end of the seat backrest. It is intended to provide a transmission case arrangement structure for rice transplanters.

[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. A fuel tank (4-1) is mounted above the engine (2), and the engine (2) and the fuel tank (4-1) are covered by a bonnet (4).

In addition, the front wall of the bonnet (4) has a substantially quarter-arc shape which is inclined downward and downward and swells forward in a side view.

In this manner, the visibility of the operator in the lower front direction can be improved, and the operability and safety can be improved.

The steering handle (3-1) described above is arranged above the hood (4).
The steering handle (3-1) is arranged such that the height of the ground is substantially the same as the upper end of the backrest (61b) of the seat (61) arranged behind. (61a) is a seat.

[0010] Thus, the ground clearance of the aircraft is adjusted to the seat (61).
The height can be set as low as possible with respect to the upper end of the backrest (61b), so that the running stability of the fuselage can be improved and the body can be made compact.

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 front wheels (7)
And the front end of the engine (2) are arranged at substantially the same position.

The transmission case (5) is arranged so as to protrude downward from the upper frame (1).
Position the rear end of the transmission case (5) just below the rear end of the bonnet (4).
It is placed on a virtual vertical line (V) passing through (7-1) and above the front axle (7-1).

In this manner, the front-rear position of the center of gravity of the transmission case (5) is substantially on the axis of the front axle (7-1), and the vertical position of the center of gravity is lower than the body frame (F). ,
And the traveling section (B) is located above the front axle (7-1).
The center of gravity of the rice transplanter (A) can be moved forward and downward, and this also improves the balance and safety of the front and rear center of gravity of the riding rice transplanter (A). Efficiency can be improved.

Then, the engine (2) and the transmission case
(5) is arranged so as to overlap in the vertical direction, so that the front and rear length of the traveling section (B) can be shortened.
(A) The overall size can be reduced. Moreover, the engine (2)
, The front end of the transmission case (5) is located at the right side, so that the engine (2) and transmission case (5) overlap when viewed from the side, so that the overall length of the aircraft is reduced as much as possible. The rice transplanter for riding (A)
Can be reduced in size and weight.

Further, since the rear end of the transmission case (5) is located just below the rear end of the hood (4), the transmission case (5), which is a heavy object, is disposed at the front of the body. On the other hand, the planting section (C), which is also a heavy object, is located at the rear of the aircraft, making it possible to improve the balance of the aircraft weight in the front-rear direction, which also improves steering operability. Can be done.

The upper end of the transmission case (5) is located substantially at the same position as the upper end of the front wheel (7), and the front end of the transmission case (5) is located rearward of the front end of the front wheel (7). ing.

In this manner, as described above, the traveling unit
The center of gravity of (B) can be moved forward and downward, and both sides of the transmission case (5) can be protected by the front wheels (7).

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 at the front position of the upper frame (1) in the lateral direction.
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 transmission case (5) via a propeller shaft (14) while being connected to the left and right rear portions of the lower frame (10). 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).

(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). 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 has a steering handle (3-1) interlockingly connected 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 steering interlocking mechanism (2) is provided by the pitman arm shaft (20), the pitman arm (21), the drag rods (22) (22), the knuckle arms (24) (24), and the like.
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 at both front positions of the upper frame (1), to which a transmission case (5) is fixed. (27) is a fixing bolt.

(28) is an engine pulley provided on the left side of the engine (2), and (29) is a transmission case.
This is the input pulley provided on the left side of (5). Both pulleys (28)
(29) is arranged substantially on the same vertical line in side view,
A V-belt (30) is wrapped between the pulleys (28) and (29) for interlocking connection. (31) is a wide-width step-and-casing body positioned on the upper surface of the upper frame (1) .The casing (31) has a rear portion integrally connected to the rear fender (32), It is made of a high-rigidity synthetic resin such as FRP so as to serve also as a floor surface, a transmission guide plate and the like.

Reference numeral (33) denotes a speed change 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
As shown in FIG. 7, 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.

On the contrary, the extension of the cylinder rod (38-2) of the lifting hydraulic cylinder (38) causes the planting portion to move.
(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. Reference numeral (55) denotes a vertical frame integrally connected to the front horizontal frame (10-2), which has a mounting seat (56) for the lifting hydraulic cylinder (38) at a lower portion and a pedal shaft supporting portion (57) at an upper portion. ) Is provided.

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.

Then, a mounting bracket (26) having an inverted L-shaped cross section and a bolt (27) are provided downwardly and continuously to the upper frame (1).
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.

In connection with disassembly and maintenance, the connecting flange (6-2) is not fastened together so that disassembly is easy and no oil leaks from the bolt holes.

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 of the frames is projected in a pair on the right and left 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.

The fuselage frame (F) is composed of an upper frame (1) and a lower frame (10) in two stages, and the left and right 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.

[0043]

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

That is, in the present invention, the transmission case is disposed below the engine, and the transmission case is disposed on an imaginary vertical line passing through the front axle in a side view, and is located above the front axle. Position, so that the front and rear positions of the center of gravity of the transmission case are located approximately on the axis of the front axle and above the front axle,
The position of the center of gravity of the traveling portion can be moved forward and downward.

As a result, the center of gravity and safety of the front and rear centroids of the riding rice transplanter having the heavy planting portion connected to the rear of the running portion can be secured well, and the riding rice transplanter can be steered. Operability and planting work efficiency can be improved.

In addition, the engine and the fuel tank are covered with a bonnet, and the front wall of the bonnet is not inclined downward and forward in a side view, and has a substantially quarter-arc shape swelling forward. Therefore, the visibility of the operator in the lower front direction can be improved, and the operability and safety can be improved.

Further, the steering handle is arranged above the bonnet, and the steering handle is arranged so that the height of the ground is substantially the same as the upper end of the backrest of the seat. The height can be set as low as possible with respect to the upper end of the seat back, so that the running stability of the aircraft can be improved and the aircraft can be made more 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.

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 a rice transplanter equipped with (7), the engine (2)
The transmission case (5) is located below the vehicle, and the transmission case (5) is mounted on the front axle (7
-1) on the virtual vertical line (V) and above the axle (7-1), and the fuel tank (4-1) above the engine (2). The engine (2) and the fuel tank (4-1) are covered with a bonnet (4), and the front wall of the bonnet (4) is inclined downward and forward downward in a side view. The steering handle (3-1) is located above the bonnet (4), and the steering handle (3-1) is attached to the seat (61). Backrest
(61b) The transmission case setting structure of a rice transplanter, wherein the upper end and the ground height are arranged so as to be substantially the same.