JPH0723629A - Mobile agricultural machine - Google Patents

Abstract

PURPOSE:To support an agricultural working device through a top link and lower links at the rear of a mobile machine body with good rigidity. CONSTITUTION:This mobile agricultural machine is constituted by liftably and lowerably installing an agricultural working device (15) through a top link (25) and lower links (26) at the rear of a mobile machine body (1). In the agricultural machine, the lower links (26) are formed from a single member and connected to nearly the center at the rear end of the machine body. A hitch installing part (55) at the rear end of the lower links (26) is formed into the shape of U to interpose reinforcing stays (58) between outsides of a piston rod installing part (57) of a lifting and lowering cylinder (28) of this machine and the hitch installing part (55).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine, such as a rice transplanter, which is equipped with a seedling mount and a planting claw for continuous seeding work.

[0002]

2. Description of the Related Art For example, in a rice transplanter, a planting section is supported by a traveling machine body through a three-point link mechanism so as to be able to move up and down, and the three-point link mechanism has one top link and two left and right sides. It is composed of lower links, and usually square pipes are used for these links.

[0003]

However, in the case of such a link structure, there is a problem that the torsional rigidity is low due to the relative displacement of the pipe of the lower link and the planting accuracy is deteriorated.

[0004]

SUMMARY OF THE INVENTION However, according to the present invention, in a mobile agricultural machine in which an agricultural working device is vertically movable via a top link and a lower link behind a traveling machine body, the lower link is formed by a single member. A structure in which a hitch mounting portion at the rear end of the lower link is formed in a U shape while being connected to the substantially rear center of the machine body, and a reinforcing stay is provided between the piston rod mounting portion and the outside of the hitch mounting portion of the lifting cylinder of this machine. Therefore, for example, by using a single square pipe whose weight is approximately the same as that of the conventional two-piece type and whose shape is large for the lower link, it is possible to greatly improve the rigidity against twisting and the like, and to reinforce the stay. As a result, the rigidity with respect to lifting can be improved.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view of a lifting link mechanism, FIG. 2 is a side view of a riding rice transplanter, and FIG. 3 is the same plan view.
Is a traveling vehicle that is a traveling vehicle on which an operator rides. The engine (2) is mounted on the vehicle body frame (3), and the front wheels for traveling on rice paddies (() are mounted in front of the mission case (4) via the front axle case (5). 6), a rear axle case (7) is connected to the rear of the mission case (4), and the rear axle case (7) supports the rear wheel (8) for traveling paddy fields. On both sides of the bonnet (9) covering the engine (2), etc., a spare seedling stand (1
0) is mounted, the mission case (4) and the like are covered by a vehicle body cover (12) on which an operator rides through step (11), and a driver's seat (13) is attached to the upper portion of the vehicle body cover (12), A steering handle (14) is provided at the rear of the hood (9) in front of the driver's seat (13).

Further, in the figure, (15) is a planting section which is an agricultural working apparatus equipped with a seedling placing table (16) for 6-row planting and a plurality of planting claws (17). The forward tilting seedling table (16) made of synthetic resin is supported on the planting case (20) via the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at a constant speed in one direction. A rotary case (21) to be rotated is supported by the planted case (20), and a pair of claw cases (22) and (22) are arranged symmetrically with respect to the rotation axis of the case (21). The planting claws (17) (17) are attached to the tips of the claw cases (22) (22). Further, a hitch bracket (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23).
Is provided, and the top link (25) and the lower link (2
An elevating cylinder for connecting a hitch bracket (24) to the rear side of the traveling vehicle (1) via an elevating link mechanism (27) including 6) and elevating the planting part (15) through the link mechanism (27). (28) is connected to the lower link (26), and the front and rear wheels (6) and (8) are driven to move, and at the same time, one seedling of one plant is transferred from the seedling mounting table (16) that slides back and forth from side to side. It is configured to be taken out by the planting claw (17) and the seedling planting operation is continuously performed.

Further, in the figure, (29) is a main transmission lever, and (3
(0) is a sub-shift lever for planting up / down and work traveling gear shifting, (3
1) is a planting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals, and (3)
4) is a center float for leveling two lines, (35) is a side float for leveling two lines, and (36) is a side fertilizer applicator.

Further, as shown in FIGS. 4 to 5, the engine (2) is placed on the pair of left and right body frames (3) and (3), and the steering shaft (3) of the steering handle (14) is mounted.
7) is erected on the upper surface of the deceleration case (38) and the rear side of the vehicle body frame (3) is fixed to the front side of the deceleration case (38). The lower side of the steering case (39) is below the deceleration case (38). Planar L-shaped steering arm (4
0) is connected to the knuckle arm (41) of the front wheel (6) via the steering rod (42), while the hydraulic steering cylinder (43) is connected to the L-shaped other end of the steering arm (40). It is configured to control the steering of the airframe by connecting to the.

The front ends of the pair of left and right main frames (44) and (44) are fixed to both sides of the rear parts of the cases (38) and (39), and the rear ends of the steering cases (39) are substantially parallel to the main frame (44) in a side view. Subframe (4
5) The front end is fixed, the rear end of each frame (44) (45) is fixed to the bracket (46) of the rear axle case (7), and the mission case (4) at the front of the case (7) is fixed to the main frame. Bracket (47) for (44)
And a gate-shaped support column (48) provided with the links (25) and (26) is erected on the rear portion of the main frame (44).
A pair of left and right upper frames (49) and (49) are obliquely provided between the front portion of the frame (44) and the support columns (48), and a lifting cylinder (28) is attached to an intermediate portion of the upper frame (49).

As shown in FIGS. 6 to 8, the top link mounting shaft (5) between the rear ends of the upper frames (49) and (49).
0) and the top hitch shaft (51) at the upper end of the hitch bracket (24), the top link (25) is provided, and the lower link mounting shaft (5) between the base ends of the columns (48) is provided.
2) is provided with the lower link (26) between the lower hitch shaft (53) at the lower end of the hitch bracket (24), and the lower link (26) is one substantially square pipe having a large cross-sectional shape. (54) using the pipe (5
4) Mounting body (55) that is a U-shaped hitch mounting portion at the rear end
Is fixed, and the front end of the pipe (54) is supported at the center of the mounting shaft (52) which is the left-right center of the machine body.
The hitch bracket (24) is supported at the center of a hitch shaft (53) pivotally supported by the open leg end of (5).

Left and right lift arms (56) integrally connected to the lower link (26) on the mounting shaft (52).
The tip of the piston rod (28a) of the lifting cylinder (28) is connected to the arm shaft (57) which is the attachment part of the tip, and the shaft (53) (57) (57) is attached outside the lift arm (56) and the attachment body (55). A stabilizer (58), which is a reinforcing stay, is provided between the brackets) to prevent lateral shake when the plant is moved up and down.

Further, a pin reinforcing member (59) for supporting the lower hitch shaft (53) on the outside of the mounting plate (55) and the stabilizer (58) is provided. Bolt on (60)
An upper end of the reinforcing member (59) is fixed to a pivotally attached plate (61) that is detachably fixed via a bracket (62) protruding laterally outside, and the lower end of the member (59) is fixed to the upper end. The hitch shaft (53) protruding outward from the stabilizer (58) is supported, and the lower hitch shaft (53) is formed in a double-supported structure to improve the rigidity of the hitch (53).

The present embodiment is constructed as described above, and one square pipe (54) used as the lower link (26) has substantially the same weight and large shape as the two lower links of the conventional means. By using the one, it is possible to make the rigidity against twisting or the like twice or more than that of the conventional one and to make the horizontal control in the planting part (15) stable and improve the planting accuracy.

Further, outside the mounting body (55) of the lift arm (56) and the lower link (26), a stabilizer (5) is provided between the lower hitch shaft (53) and the arm shaft (57).
By providing 8), lateral vibration of the link mechanism (27) can be prevented when the planting part (15) is moved up and down, and the rigidity against lifting can be improved.

[0015]

EFFECTS OF THE INVENTION As is clear from the above embodiments, according to the present invention, the agricultural working apparatus (15) is vertically movable via the top link (25) and the lower link (26) behind the traveling machine body (1). In an agricultural machine, the lower link (26) is formed of a single member to be connected to the rear end of the machine body substantially at the center, and the hitch attachment part (55) at the rear end of the lower link (26) is formed in a U shape. Machine lifting cylinder (2
Since the reinforcing stay (58) is provided between the outer side of the piston rod mounting portion (57) and the hitch mounting portion (55) of 8), for example, the lower link (26) has the weight of the conventional two types and the weight of the conventional type. By using a single square pipe that is approximately the same size and has a large shape, it is possible to greatly improve the rigidity against twisting and the like, and the reinforcing stay (58) is used to prevent lateral shake when moving up and down. It has a remarkable effect such that the rigidity against can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a lifting link mechanism section.

FIG. 2 is an overall side view of a rice transplanter.

FIG. 3 is an overall plan view of a rice transplanter.

FIG. 4 is a side view of a traveling vehicle body.

FIG. 5 is a plan view of a traveling vehicle body.

FIG. 6 is a side view of a lifting link mechanism.

FIG. 7 is a rear view for explaining the lifting link mechanism.

FIG. 8 is a rear view of the hitch bracket portion.

[Explanation of symbols]

 (1) Travel vehicle (travel vehicle) (15) Planting part (agricultural work device) (25) Top link (26) Lower link (28) Lifting cylinder (55) Hitch mounting plate (hitch mounting part) (57) Arm shaft (Mounting part) (58) Stabilizer (reinforcing stay)

Claims (1)

[Claims] 1. In a mobile agricultural machine in which a farm work device is vertically movable through a top link and a lower link behind a traveling machine body, the lower link is formed of a single member and is connected to a substantially center of a rear end of the machine body. A mobile agricultural machine in which a hitch mounting portion at the rear end of the lower link is formed in a U shape, and a reinforcing stay is provided between the piston rod mounting portion and the outside of the hitch mounting portion of the lifting cylinder of the machine.