JP3273732B2 - Riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as one form of a riding rice transplanter, a planting portion is connected to a rear portion of a traveling portion via an elevating link mechanism, and the traveling portion has a pair of left and right front wheels mounted on a front portion of a body frame. In some cases, a pair of left and right rear wheels are mounted on the rear part, and a casing body that also serves as a floor, a transmission guide plate, a fender, and a seat mounting plate is stretched on the body frame.

[0003] The casing body is formed such that the rear edge is wider than the width of the three rows of seedling mats on the seedling mounting table.

[0004]

However, in the above-described riding rice transplanter, the rear edge is formed wider than the width of the three seedling mats of the seedling mounting table, as described above. The operator sits down on the seat attached to the seat mounting plate, turns the steering wheel back and downward while operating the steering wheel, and sees the status of the already planted seedlings on the side and the newly planted plants along the existing seedlings. When visually observing the condition of the attached seedlings, there is a problem that the rear end of the casing body hinders the visual recognition.

[0005]

Therefore, according to the present invention, a planting section is connected to the rear of the traveling section via an elevating mechanism, and the traveling section mounts a pair of left and right front wheels on a front portion of the body frame. A pair of left and right rear wheels are attached to the rear part, a casing body serving also as a floor surface, a speed change guide plate, a fender and a seat mounting plate is stretched on the body frame, and the planting part is provided with a seedling mounting table. The seedling mounting table is capable of mounting a four-row seedling mat, and the casing body has a lateral width at the rear edge shorter than the three-row seedling mat mounting width of the seedling mounting table, and A riding rice transplanter gradually narrowed toward the front, in which a body frame connects a front part of a pair of left and right lower frames to a transmission case, and arranges an upper frame at a position above both lower frames. By connecting, the upper frame and lower frame The lower end of the lower frame is shifted rearward from the upper frame, and the rear end of the lower frame and the slope extending rearward from the middle of the lower frame are configured. The rear part of the rear frame is integrally connected with the rear-view portal type frame, an engine is mounted on the front part of the body frame, the engine is covered with a bonnet, and the transmission case is located below the engine. Is arranged,
An engine pulley provided on the side of the engine and an input pulley provided on the side of the transmission case are arranged on substantially the same vertical line in a side view, and a transmission belt is wound between the two pulleys to interlock. Connected and the transmission belt
The engine and the transmission case are arranged at positions vertically overlapping each other in a side view, and the clutch operating part and the brake operating part interlockingly connected to the transmission case are respectively located at the left and right lateral positions of the bonnet, and The riding rice transplanter is disposed at a position forward of a rear end of the bonnet, and the pair of left and right rear wheels are disposed such that outer ends are located within left and right ends of a rear portion of a casing body. Is what you do.

[0006]

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 engine (2) mounted on the front upper portion of the body frame (F), a steering shaft (3) is provided on the rear portion of the engine (2), and a steering handle (3) is provided on the upper portion. 3-1) is worn. (4) is a bonnet that covers the top of the engine (2) and fuel tank (4-1).

A transmission case is provided below the engine (2).
(5), and fix the front axle case (6) on the left and right sides of the transmission case (5), and attach the front wheels (7) to it via the front axle (7-1). Along with
The rear axle case (8) is located behind the fuselage, and rear wheels (9) are mounted on both left and right sides of the rear axle case (8).

As shown in FIGS. 3 and 4, the body frame (F) connects the front portions of a pair of left and right lower frames (10) extending in the front-rear direction to the transmission case (5). By arranging and connecting upper frames (1) (1) extending in the front-rear direction above the lower frames (10) (10), the upper frames (1) (1) and the lower frame (10) ( Ten)
The lower frame (10) and the rear end of the lower frame (10) have an upper frame.
(1) It is shifted rearward from (1), and the rear portions of the lower frames (10) and (10) and the inclined rear frames (13) and (13) extending rearward from the middle of the lower frames (10) and (10). ) And the rear part are integrally connected by a rear view portal type frame (11). The lower frames (10) and (10) are connected to a front horizontal frame (10-2) provided by extending the front ends (10-1) and (10-1) horizontally in the center of the fuselage, respectively. , The rear end (10-3) (10-3) is connected to the portal frame (11), and the rear frame (13) (1
3) connects the front ends to the left and right sides of the front horizontal frame (10-2), and connects the rear ends (13-1) and (13-1) to the portal frame (1
Connected to the top of 1). (10-4) is the lower frame (10)
(12) is an intermediate horizontal frame, which is located in the lateral direction of the fuselage, and has vertical portions (12-1) on both the left and right sides.
(12-1) Rear ends of left and right upper frames (1) (1-1) (1-
In addition to 1), it is connected to the intermediate position of the lower frames 10 and 10 in the front-rear direction.

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

A frame (10-7) for a spare seedling mounting table is provided at the left and right sides of the front of the upper frame (1). (10-8) is the support frame for the differential lock lever, (10-
9) is a step support frame that supports the step center.

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 portal frame (11).

(16) is a planting drive shaft for interlockingly connecting 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 retractable, while 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 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.
A transmission pulley provided on the left side of (5) .The engine pulley (28) is disposed above a step-and-casing casing body (31) to be described later.
9) is disposed below the casing body (31), and both pulleys (28) and (29) are disposed substantially on the same vertical line in side view, and between the pulleys (28) and (29). The power transmission belt (30) is wound around and interlocked with the power transmission belt (30), and the power transmission belt (30) is arranged at a position where the engine (2) and the transmission case (5) overlap vertically in a side view.

Further, (31) is a wide-width step-and-step casing body located on the upper surface of the upper frame (1), and the rear is integrally connected to the rear fender (32) and the floor surface (31). 31b), it is made of a synthetic resin having high rigidity such as FRP so as to serve also as the transmission guide plate (31c).

As shown in FIGS. 1 and 2, the casing body (31) has a rear half portion (31e) which also serves as a transmission guide plate (31c), a fender (31d) and a seat mounting plate (31a). Is formed in a substantially oblong rectangular shape in plan view, and the first half (31f) forming the floor surface (31a) is formed in a generally trapezoidal shape in plan view with a gradually narrowing left and right width toward the front, and a rear edge. (31g) is disposed forward of the axis of the rear axle (15a), and the left and right width of the rear edge (31g) is set to be greater than the width of the three-row seedling mat on the seedling mounting table (70) described later. Are formed to have a short width and a width wider than a distance between the pair of left and right rear wheels (9) and (9), and outer end portions of both rear wheels (9) and (9) are formed at rear portions of the casing body (31). It is located inside the left and right ends.

In this manner, the operator sits on the seat (61) mounted on the seat mounting plate (31a) of the casing body (31), turns the rear side downward while operating the steering wheel, and moves the side planted plant. When visually checking the status of attached seedlings and the status of newly planted seedlings that are newly planted along the existing planted seedlings, the casing body
The rear end (31g) of (31) does not obstruct the view.

The front half (31f) forming the floor surface (31b) of the casing body (31) has a narrow left and right width toward the front, so that the operator can use the seat (61). The user can easily visually recognize the field scene at the front lower left and right sides of the airframe in a state of being seated.

Accordingly, the operator can surely visually recognize the condition of the planting seedling and the field scene at the front lower right and left sides of the machine body, and can improve the planting work efficiency.

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).

(40) is a lift link of a lifting link mechanism (35), and a pair of left and right lift links (40) has a front end provided with a lift arm.
While being connected to the upper support shaft (39) of (37), the rear end is pivotally supported by a horizontal shaft (42) provided at the front of the planting frame (41). (Four
3) is a lower link for linking the running part (B) and the planting part (C), and a pair of lower links (43) on the left and right sides has a front end provided on the link support bracket (36). While being pivoted to
The rear end is pivotally supported on a horizontal axis (42) provided at the front of the planting frame (41).

(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 to raise 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, which is a steering case.
(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 FIG. 1 and FIG. 2, reference numeral (60) denotes an operation unit, and a seat (61) is provided above the casing body (31).
Is provided. (62) is a planting elevating lever provided on the right side of the seat (61), (63) is a clutch pedal as a clutch operating unit, (64) is a brake pedal as a brake operating unit, and a left pedal (64-1). And a right pedal (64-2), and the clutch pedal (63) and the brake pedal (64) are respectively located on the left and right sides of the bonnet (4) and the bonnet (4).
And is interlockingly connected to the transmission case (5). (65) is an auxiliary speed change lever.

The embodiment of the present invention is configured as described above, and accordingly, the engine mounted at the front position of the fuselage
The power of (2) is transmitted to the lower transmission case (5) and simultaneously to the front axle case (6) provided on both sides of the transmission case (5). The left and right front axles (7-1) and (7-1) and the front wheels (7) and (7) are driven. In addition, power is guided to a rear axle case (8) via a propeller shaft (14) to drive rear wheels (9) and (9) to cause the aircraft to travel.

When the steering handle (3-1) is turned left and right, the steering shaft (3) is turned,
The reduction gear (19-1) in the steering case (19) operates to rotate the pitman arm shaft (20) in the left-right direction.

When the pitman arm (21) operates, the knuckle arm (2) is moved via the drag rods (22) and (22).
4) Rotate (24) and front gear box (23) (23),
At the same time, the front wheels (7) and (7) are steered left and right.

As shown in FIGS. 1 and 2, a seedling table (70) is disposed in the planting section (C) in a front-back, high-low inclination position. ) Is a four-row seedling mat (not shown)
Can be placed, while the four claws (71) (71) (71) (7
1) is set up so that the four-row seedling planting operation can be performed simultaneously.

[0036]

According to the present invention, the following functions and effects are produced.

According to the present invention, the body frame connects the front portions of the pair of left and right lower frames to the transmission case,
By arranging and connecting the upper frame to the upper position of both lower frames, the upper frame and the lower frame are configured as an upper and lower two-stage integrally connected frame, and the rear end of the lower frame is lower than the upper frame. Also, the rear part of the lower frame and the rear part of the inclined rear frame extending rearward from the middle part of the lower frame are integrally connected by a rear-view portal type frame. In this manner, the body frame has a frame-like structure, and the rigidity is greatly increased. As a result, the engine can be reliably supported. In the present invention, the engine pulley provided on the side of the engine and the input pulley provided on the side of the transmission case are arranged on substantially the same vertical line in a side view, and the transmission belt is wound between the two pulleys. And the transmission belt is located at a position where the engine and the transmission case overlap in the vertical direction when viewed from the side, so that the power transmission path from the engine to the transmission case can be shortened, Power transmission efficiency can be improved. Moreover, since the front and rear lengths of the front part of the traveling part where the engine, the transmission case and the transmission belt are arranged can be shortened,
The front and rear length of the traveling section can be shortened, and the riding rice transplanter can be made more compact. As a result, the storage capacity of the aircraft can be improved, and the aircraft can be smoothly rotated even in a narrow place. Moreover,
As described above, since the front-rear length of the front part of the traveling unit can be reduced, the visibility of the front lower field scene is improved for the operator who performs the steering operation while sitting on the driving unit. The steering operability can be improved. As a result, the planting work efficiency can be improved.

In the present invention, the left and right widths of the rear end edge of the casing body are set to be shorter than the width of the three rows of seedling mats on the seedling mounting table, and are gradually narrowed toward the front. Therefore, the operator sits down on the seat attached to the seat mounting plate of the casing body, faces the rear downward while operating the steering wheel, and follows the situation of the planted seedlings on the side and along the existing planted seedlings. When you visually check the status of newly planted seedlings,
The rear end of the casing body does not hinder the visual recognition, and the status of the planted seedlings can be visually recognized without fail, so that the planting operation efficiency can be improved. In the present invention, since the casing body is formed with the left-right width narrow toward the front,
The operator can easily visually recognize the field scene in front of and below the left and right sides of the machine while sitting on the seat, and the planting work efficiency can be improved from this point as well. In the present invention, since the engine and the transmission case are vertically arranged at the front of the body frame, the front-rear width of the body can be reduced, and the body can be made more compact. In the present invention, since the clutch operating portion and the brake operating portion are respectively located on the left and right sides of the bonnet and at a position forward of the rear end of the bonnet,
Even when the front-rear width of the body is reduced, the operability of the clutch operation unit and the brake operation unit can be respectively satisfactorily secured. In the present invention, the left and right width of the rear edge of the casing body is
Because the width of the seedling mat is shorter than the width of the three seedlings of the seedling mounting table, and the outer ends of the pair of left and right rear wheels are located in the left and right ends of the rear end of the casing body. The left and right width of the body can be shortened, the body can be made compact, and even when mud bouncing due to the rear wheels, mud can be prevented from adhering to the casing body.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter according to 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 steering interlocking mechanism.

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

[Explanation of symbols]

 (2) Engine (3) Steering shaft (3-1) Steering handle (5) Transmission case (7) (7) Front wheel (9) (9) Rear wheel (19) Steering case (25) Steering interlock mechanism (C ) Planting department

Continued on the front page (72) Inventor Akira Hoshizawa 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Inside Yan Ma Agricultural Machinery Co., Ltd. (72) Inventor Yasuhiko Tanaka 1-32 Chaya-cho, Kita-ku, Osaka, Osaka Yanmar Agricultural Machinery Co., Ltd. (56) References JP-A-60-107463 (JP, A) JP-A-56-88711 (JP, A) JP-A-55-131309 (JP, A) , U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) A01C 11/02

Claims (1)

(57) [Claims] 1. An elevating mechanism in which a planting section (C) is provided behind a traveling section (B).
(D), the traveling unit (B) has a pair of left and right front wheels (7) and (7) attached to the front of the body frame (F), and a pair of right and left rear wheels at the rear.
(9) Attach (9), and stretch the casing body (31) that also serves as the floor, the transmission guide plate, the fender and the seat mounting plate on the body frame (F), and the planting part (C) , A seedling table (70), and a seedling mat for four rows can be placed on the seedling table (70). 70) is a riding rice transplanter that is shorter in width than the three-row seedling mat mounting width of three rows, and is gradually narrowed forward.The fuselage frame (F) Pair of
Connect the fronts of the lower frames (10) and (10) to
Upper frames (1) and (1) above the arms (10) and (10).
By connecting and connecting the upper frame (1) (1)
Upper and lower two-stage integrally connected frame with lower frame (10) (10)
And the lower frame (10) (10) on the lower side.
Rear end is shifted rearward from upper frame (1) (1),
Rear of the frame (10) (10) and the lower frame (10)
(10) Inclined rear frame extending backward from the middle part
(13) Combine the rear part of (13) with the rear view portal type portal frame (11).
Body to connect, the machine body frame (F) equipped with an engine (2) in front of, as well as covered by the engine (2) the bonnet (4), the transmission case below the engine (2) ( 5), an engine pulley (28) provided on the side of the engine (2),
The input pulley (2
And 9) are arranged on substantially the same vertical line as viewed from the side, and a transmission belt (30) is wound between the pulleys (28) and (29) to be interlocked and connected, and the transmission belt (30) is The engine (2) and the transmission case (5) are arranged at positions overlapping in the vertical direction in a side view, and the clutch operation unit and the brake operation unit interlockingly connected to the transmission case (5) are respectively connected to the bonnet (4). ) At the left and right side positions, and disposed at a position forward of the rear end of the hood (4), the pair of left and right rear wheels (9) (9),
A riding rice transplanter, wherein an outer end is located within a left and right end of a rear part of a casing body (31).