JPH031922B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides an engine and a transmission case in the front of the machine, a seedling planting device and a control handle connected to the front of the machine, and A wheel transmission case extending rearward from the case so as to be vertically swingable is connected to the transmission case with a proximal case part that is vertically swingably connected and can be bent vertically with respect to the case part. and a distal end case portion, the distal end of an arm extending from the base of the distal end case portion, and a swinging arm pivotally connected to a fixed portion on the transmission case side so as to be vertically swingable. the proximal side transmission case part, which is pivotally connected to the distal end so that the propulsion wheel pivotally supported by the distal side case part is reversibly moved rearward as the wheel transmission case swings downward; an extending arm;
The present invention relates to a walk-behind rice transplanter in which a swinging arm is configured as a movable link part of a quadruple link.

[Conventional technology]

The rice transplanter described above is capable of maintaining the grounding point of the wheels approximately below the center of gravity of the machine even when the wheels are lowered due to the bending of the wheel transmission case, and when working in the countryside with deep tillers, the rice transplanters can It has the characteristic that the lifting of the front part of the aircraft due to the drive reaction force from
Driving force is transmitted to one propulsion wheel via a transmission case provided on one side (taking a two-wheel walking type as an example, see Japanese Patent Publication No. 52-23928, for example). As mentioned above, when the wheel transmission case is composed of two case parts that are pivotally connected, the strength of the pivot parts decreases, so it is necessary to adopt a reinforcing structure to support the propulsion wheels. is desired. Therefore, it is easy to think of a reinforcing structure in which a reinforcing stay with a pivot connection structure with an equal arm ratio is placed in the two case parts of the wheel transmission case so as to face the wheel transmission case, thereby supporting the propulsion wheels from both the left and right sides. . However, while this reinforcement structure allows the wheels to be supported from left and right in a well-balanced manner, it takes time to manufacture the reinforcement stays, and the reinforcement is not very effective against prying forces, leaving room for improvement. It was hot.

The present invention has been made in view of the above-mentioned circumstances, and has an object to provide a structure that strongly supports wheels while having the advantage of supporting wheels from left and right in a well-balanced manner.

[Means for solving problems]

The present invention is characterized in that the front wheel transmission case is provided on one lateral side of the fuselage body, and the one propulsion wheel is attached to an axle protruding from the inner side of the fuselage body of the tip side case part, and The tip of the axle is supported at the rear end of a stay that is supported on a fixed part at the front of the fuselage so that it can swing up and down and slide in the front and back directions, and its functions and effects are as follows. .

[Effect]

In other words, as mentioned above, the stay can swing up and down, and can slide forward and backward,
It is stronger against prying force than a structure in which a pivot part is formed in the stay, and can support the propulsion wheel in a well-balanced manner from the left and right sides, and can support the propulsion wheel without disturbing the bending even when the wheel transmission case is bent.

〔Effect of the invention〕

Therefore, a structure has been provided which can strongly support the propulsion wheel without causing twisting even when a strong external force is applied to the propulsion wheel.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 3, the engine 1 is located at the front of the aircraft.
and a transmission case 2, and a wheel transmission case 4 with one propulsion wheel 3 pivotally supported at the end thereof is attached to one side of the transmission case 2,
A seedling planting device 5 consisting of two planting arms, a seedling platform 6 for placing pine-shaped seedlings W, and a control handle 7 extending toward the rear are provided at the rear of the machine, and a pair of left and right soil leveling floats are provided. 8 is provided to constitute a one-wheel walking type rice transplanter for two-row planting.

To explain the wheel transmission case 4, as shown in FIGS. 1 and 2, the case 4 includes a proximal case portion 4a that is vertically freely connected to the transmission case 2 at an axis P. , this case part 4
The distal end case portion 4b is connected to the distal end case portion 4b so as to be vertically bendable about the axis Q with respect to the distal end case portion 4b.
The tip of an arm 9 extending from the base end of the wheel transmission case 4 is pivotally connected to the tip of a swinging arm 10 which is pivotally connected to a fixed part on the transmission case 2 side so as to be able to swing vertically. The proximal case portion 4a is configured such that the propulsion wheel 3 pivotally supported by the distal case portion 4b is reversibly moved rearward with the movement of the proximal case portion 4a;
The extending arm 9 and the swinging arm 10 constitute a four-link. The vertical adjustment of the propulsion wheel 3 is performed by a hydraulic cylinder 11 interposed between the proximal case portion 4a and the transmission case 2.

In this rice transplanter, in addition to supporting one end of the rotating shaft 3a of the propulsion wheel 3 with the wheel transmission case 4, the other end of the rotating shaft 3a is supported by a support boss 1 at the rear end of the stay 12.
2a to support the rotating shaft 3a, and to slidably support the stay 12 on a cylindrical boss 13 pivotally supported on the side of the mission case 2 so as to be swingable around the axis P. It's structured.

As shown in FIGS. 4 and 5, a planting claw 14 is attached to the seedling planting device 5.
When taking out seedlings one by one from the pine-like seedlings W in step 4, grooves are formed in the pine-like seedlings W in advance using the bent pieces 14a, 14a formed upward at the left and right ends of the planting claws 14.
Ws, Ws can be cut and the next seedling can be taken out easily without losing its shape.

[Another example]

In this embodiment, the vertical adjustment of the propulsion wheel 3 was performed by the hydraulic cylinder 11 interposed between the base end side case part 4a and the transmission case 2.
As shown in the figure, the bracket 1 is attached to the cylindrical boss 13 using the support structure using the stay 12.
5 may be attached, and a hydraulic cylinder 11 may be interposed between this bracket 15 and the front end of the stay 12 to take advantage of the sliding structure of the stay 12.

[Brief explanation of the drawing]

The drawings show an embodiment of the walk-behind rice transplanter according to the present invention, and FIG. 1 is a schematic side view showing the wheel transmission case and stay, FIG. 2 is a schematic plan view showing the support structure of the propulsion wheels, etc., and FIG. is an overall side view of the rice transplanter, No. 4
The figure is an enlarged view of a pine-shaped seedling during operation, FIG. 5 is a perspective view of the tip of the planting claw, and FIG. 6 is a schematic plan view showing another embodiment of the support structure for the propulsion wheel. 1... Engine, 2... Mission case, 3
...Propulsion wheel, 4...Wheel transmission case, 4a...
Proximal case part, 4b...Distal case part, 5...
... Seedling planting device, 7 ... Control handle, 9 ... Arm, 10 ... Swing arm, 11 ... Hydraulic cylinder, 12 ... Stay.

Claims (1)

[Claims] 1. An engine 1 and a transmission case 2 are installed in the front of the fuselage, and a seedling planting device 5 is installed in the rear of the fuselage.
and a base end side case portion connected to the transmission case 4 to which the operation handle 7 is connected and which extends rearward from the transmission case 2 so as to be able to swing up and down. 4a, and a distal end case portion 4b connected to the case portion 4a so as to be vertically bendable, and a distal end of an arm 9 extending from the base of the distal end case portion 4b, and a mission case side. The distal end of a swinging arm 10 is pivotally connected to the fixed part of the swinging arm 10 so as to be swingable up and down, and as the wheel transmission case 4 swings downward, the propulsion arm 10 is pivotally supported on the distal end side case part 4b. A walking type in which the proximal transmission case portion 4a, the extending arm 9, and the swinging arm 10 are configured as a movable link portion of a quadruple link so that the wheel 3 is reversibly moved rearward. In the rice transplanter, the wheel transmission case 4 is provided on one lateral side of the machine body, and one propulsion wheel 3 is mounted on an axle 3a protruding from the inside side of the machine body of the tip side case part 4. A walking type rice transplanter in which the tip of the axle 3a is supported at the rear end of a stay 12 which is attached to a fixed part at the front of the machine body and supported so as to be vertically swingable and slidable in the front and rear directions. 2. The walk-behind rice transplanter according to claim 1, wherein the stay 12 is forcibly slid back and forth by a hydraulic cylinder 11.