JPH01197101A - Wheel for rice field - Google Patents

Abstract

PURPOSE:To improve both the durability and shock-absorbing ability of a wheel for rice field by molding rubber on the entire periphery of a rim to form a rubber wheel, providing the outer periphery of the rubber wheel with propulsion lugs, and burying a core bar inside each propulsion lug. CONSTITUTION:A wheel for rice field consists of a boss 1 inserted onto the axle of a body and a rim 2 which are connected together through sporks 3. In this case, the entire periphery of the rim 1 is molded with rubber to form a rubber wheel. On the outer periphery of the rubber wheel, a large number of spike lugs projecting radially keeping a predetermined space with each other are formed, and respective spike lug 5 are provided with a large number of propulsion lugs projecting right and left as well as inside and outside keeping a predetermined space with each other. In addition, a core bar 7 is buried inside each propulsion lug, respectively. Furthermore, the part corresponding to the rim 2 of each core bar 7 is formed concave so that the rim 2 is fitted to the inside of each core bar 7. Thereby, each propulsion lug 6 is prevented from deforming and the shock-absorbing ability can be also improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a paddy wheel used in a rice transplanter, a seeder for paddy fields, etc.

Prior Art As seen in Japanese Utility Model Publication No. 58-5604, the conventional rice paddy wheel is a rubber wheel with rubber molded around the entire periphery of the rim. A propulsion lug is provided integrally with the rubber, and within this propulsion lug,
The structure was such that the core metal, which was threaded through the rim, was buried so as not to come into contact with the rim.

Problems to be Solved by the Invention In conventional Paddy ψ wheels, the core metal protrudes greatly from the outer periphery of the rim and is buried within the propulsion lug. The large protruding core metal causes vibrations to the aircraft, and the weight of the aircraft places strong local pressure on the rubber interposed between the core metal and the rim, causing separation between the rubber and the rim. It has the disadvantage that it is easy to use and its durability is reduced.

Means to solve problems This invention aims to solve the above problems.

The following technical measures were taken.

That is, in the present invention, a rubber wheel is formed by molding rubber 4 around the entire circumference of a rim 2, and rubber propulsion lugs 6 are integrally provided with the rubber 4 at a constant pitch around the periphery of the rubber wheel. ,
A paddy field wheel is constructed by embedding the rim 2 on both left and right sides and on the inner circumference thereof with a core metal 7 having a recess formed in the propulsion lug 6 to fit from the inner circumference side of the rim 2. .

Functions and Effects of the Invention According to the present invention, since the core metal is interposed in the rubber propulsion lug, unnecessary deformation is eliminated during running in paddy fields, the propulsive force is increased, and propulsion with less slip can be achieved.
When driving on the road, there is no core metal between the rim and the rubber that contacts the road surface, which reduces vibration to the aircraft, and also prevents the rim from separating from the rubber where the core metal is installed. Durability can be improved.

Embodiment 1 is a boss that is inserted into and fixed to the IPill I of the aircraft body. Reference numeral 2 denotes a rim, which is formed by deforming an iron pipe to have an oval cross section to form an endless loop, and the boss 1 and the rim 2 are connected by spokes 3.

4 is rubber, which is molded around the rim 2 to form a rubber wheel.

Reference numeral 5 denotes spikes, which are provided on the outer periphery of the rubber wheel so as to protrude in the radial direction at small intervals.

Reference numeral 6 denotes propulsion lugs, which are integrally formed with the rubber 4 from the spike lug portions at predetermined intervals outwardly and inwardly on the left and right, and have a thickness that is equal to the thickness of the left and right outer edges and the inner edge that is the boss side. It is configured to be slightly thin.

Reference numeral 7 denotes a core metal embedded in the propulsion lug, and the core metal on the side is formed of an iron plate, and the portion corresponding to the rim 2 has a predetermined interval inside the core metal on the left and right sides and inside of the rim 2. The top portion of the left and right center of the core metal 7 is cut in a concave shape so that the metal core 7 can be fitted with the metal core 7 arranged therebetween.

According to the configuration above, when the aircraft is propelled through rice fields, the propulsion lugs deform less than conventional wheels that do not contain core metal, so there is less slippage and reliable propulsive force is obtained. when driving on the road.

Since the core metal 7 is not interposed between the ground contact part of the wheel and the rim 2, vibrations from the road surface are sufficiently absorbed and smooth propulsion can be obtained. Further, since the core metal 7 does not promote separation between the rim 2 and the rubber at the propulsion lug portion, a highly durable wheel can be obtained.

In the embodiment shown in FIG. 4, the core metal 7 within the propulsion lug 6 is shifted in the thickness direction, and the structure is thicker on the rotational direction side during forward movement. In the embodiments shown in FIGS. 5 to 7, the thickness of the propulsion lug portion (A) corresponding to the notch portion where the core metal 6 wraps around the rim 2 is thickened to improve durability. In the embodiment shown in FIGS. 8 and 9, which are the embodiments shown in FIG. 6, a hole 8 is bored in the core bar 7 to prevent the rubber from peeling off. Furthermore, as shown in FIG. 10, an embodiment in which the rim 2 and the core bar 7 are welded is also conceivable.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view showing a part of the wheel, Fig. 2 is a side sectional view of the main part,
Fig. 3 is a back sectional view of the main part, Fig. 4 is a side sectional view of another example, Fig. 5 is a side sectional view of yet another example, Fig. 6 is a plan sectional view thereof, and Fig. 7 is a side sectional view of another example. 8 is a side sectional view of still another example, FIG. 9 is a back sectional view thereof, and FIG. 10 is a back sectional view of still another example. In the diagram, symbol 1 is the boss, 2 is the rim, 3 is the spoke, and 4 is the rubber. 5 is a spike lug, 6 is a propulsion lug, and 7 is a core bar.

Claims (1)

[Claims] Rubber 4 is molded around the entire circumference of the rim 2 to form a rubber wheel.Rubber propulsion lugs 6 are provided integrally with the rubber 4 at a constant pitch around the periphery of the rubber wheel. In this paddy field wheel, the rim 2 is buried so that both left and right sides and the inner circumferential side thereof are wrapped with a core bar 7 having a recessed portion that fits from the inner circumferential side of the rim 2.