JP2002019404A - Agricultural wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and inexpensively manufacture an agricultural wheel even when specifications of a wheel shaft are changed on an agricultural wheel of the same size. SOLUTION: An annular ring-shaped rim, a wheel body 4 arranged in an inner peripheral part of the rim and an installing tool 3 arranged in the rotational center of the rim and the wheel body 4 are integrally joined, and a boss 2 installed on the wheel shaft of a traveling vehicle is installed in and fixed to the installing tool 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural wheel mounted on an agricultural machine such as a rice transplanter or a transplanter.

[0002]

2. Description of the Related Art An agricultural wheel mounted on an agricultural machine such as a rice transplanter includes a boss mounted on an axle of a traveling vehicle, a spoke extending radially from the boss, and an outer end of the spoke. 2. Description of the Related Art A rim having an annular rim and an elastic ring made of rubber or the like covering the entire rim is conventionally known.

[0003]

The above-mentioned conventional agricultural wheels are usually joined together by welding while holding the boss, spokes and rim in proper mutual positions using joining jigs, and thereafter, It has been manufactured by baking an elastic ring on a rim. However, depending on the type and specifications of the agricultural machine to which the agricultural wheels are attached, the axle diameter and length may differ even though the wheel size (wheel diameter, etc.) is the same. In this case, it is necessary to change the boss according to each specification and the like, and to manufacture the entire agricultural wheel each time.

Also, a jig for joining a boss, a spoke, and a rim requires a certain degree of dimensional accuracy in order to properly set the mutual position of each part, and when the dimensions of one part are changed. It is difficult to use the same jig.
Therefore, in the case described above, there has been a problem that the joining jig must be changed as a whole with the change of the boss. In particular, such a problem significantly deteriorates the production efficiency when producing a large variety of small quantities of agricultural wheels, and causes an increase in cost.

[0005] The present invention has been made in view of such circumstances, and even if the axle shape or the like is changed for agricultural wheels of the same size, it can be manufactured efficiently and at low cost. The purpose is to provide agricultural wheels.

[0006]

The present invention employs the following technical means to achieve the above object. That is, the agricultural wheel according to the present invention includes an annular rim 5, a wheel main body 4 disposed on an inner peripheral portion of the rim 5, and a mounting tool 3 disposed at a central portion of the rim and the wheel main body. And a boss 2 mounted on the axle of the traveling vehicle is fixed to the mounting fixture 3. According to this, for agricultural wheels of the same size, it is sufficient to change only the shape of the boss 2 and fix it to the fixture 3 without manufacturing the entire agricultural wheel according to the shape of the axle. Furthermore, since the rim 5, the wheel body 4 and the attachment 3 can be formed in a fixed shape, joining using one kind of joining jig becomes possible, and even if a small amount of various kinds is used, an agricultural wheel can be efficiently produced. Can be manufactured,
The cost can be reduced.

It is preferable that the mounting member 3 is formed in a cylindrical shape and the boss 2 is mounted in the cylinder by fitting the boss 2 therein. In this case, a plurality of types of bosses corresponding to different axle shapes are provided. It is preferable that the outer surfaces of the two are formed in the same shape so that each of them can be internally fitted to the attachment 3. With such a configuration, it is possible to attach a plurality of types of bosses 2 to the fixture 3 having a fixed shape, and it is possible to easily cope with a change in the axle shape.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the agricultural wheel 1 according to the present invention is a so-called rubber-baked wheel, and has a boss 2 mounted on the axle of a traveling vehicle in an agricultural machine at the center of rotation thereof. On the outside, there is provided a fixture 3 for attaching and fixing the boss 2, a wheel body 4 is provided on an outer peripheral portion of the fixture 3, and an annular rim 5 is provided on an outer end of the wheel body 4. .

The rim 5 is made of a metal pipe having a circular cross section, and an elastic ring 6 made of an elastic material such as rubber is provided on the outer surface thereof. Plate-shaped blade lugs 7 projecting outward and axially, respectively
Are provided at intervals in the circumferential direction, and a plurality of block-shaped trapezoidal lugs 8 are provided at intervals in the circumferential direction on the outer peripheral portion of the elastic ring body 5 between the blade lugs 7. In the present embodiment, the wheel main body 4 is constituted by spokes 9 made of a plurality of pipe members extending radially from the attachment 3, and a reinforcing plate 10 is provided between the spokes 9.

The wheel body 4 is not limited to the spoke type of the present embodiment, but may be replaced with a disk type formed of a plate material or the like. As shown in FIG.
The attachment 3 is formed in a cylindrical shape, and a keyway 12 is formed in the cylinder of the attachment 3 in the axial direction. The boss 2 is formed in a cylindrical shape, and the inside of the cylinder is formed as a mounting hole 2A through which an axle is inserted. The outer peripheral surface of the boss 2 can be fitted into the cylinder of the attachment 3. A key 13 fitted in the key groove 12 is formed to extend in the axial direction and protrude.

A step 1 is provided at one end of the key 13.
A stopper 15 protruding through the stopper 4 is formed, and an insertion hole 16 for inserting a retaining pin or the like for the axle is formed on an end side opposite to the stopper 15. In the present embodiment, the mounting hole 2A is formed in a hexagonal shape, but the shape, dimensions, etc. thereof are appropriately changed in accordance with the axle shape of the traveling vehicle, and correspond to the axle shape. The various bosses 2 have the same outer surface shape, so that all of them can be fitted inside the attachment 3.

The attachment 3, the rim 5 and the spoke 9
It is configured to be integrally joined using a joining jig 20 as illustrated in FIG. The joining jig 20 has a plane circular surface plate 21 and a circular holding table 22 protruding at the center of the surface table 21.
A first holding member 23 for positioning the attachment 3 by being inserted into the attachment 3 protrudes. Further, a second holding member 24 for holding the rim 5 is provided on an outer peripheral portion of the surface plate 21, and the holding table 22 and the second holding member 2 are provided.
4 between the third holding member 2 for holding the spoke 9
5 are provided.

Then, the first holding member 23 is inserted and held in the fixture 3, and the rim 5 and the spoke 9 are held via the second and third holding members 24 and 25, respectively.
The members 3, 5, and 9 are arranged at appropriate positions with respect to each other, and are joined together by welding or the like to a butt portion between the members. The reinforcing plate 10 disposed between the spokes 9 may be joined by welding on the surface plate 21 or using another jig or the like, or may be connected via fixing means such as bolts. It may be.

As shown in FIG. 1B, the boss 2
It is mounted and fixed by being press-fitted into the mounting fixture 3, and is firmly stopped by the engagement between the key groove 12 and the key 13. In addition, by fitting the step 14 of the stopper 15 to the end face of the fixture 3, the fitting amount of the boss 2 is regulated, and both ends of the boss 2 in the axial direction project from the fixture 3. It has become. The length L in the axial direction of the attachment 3 is set so that a ≦ L with respect to the outer diameter a of the spoke 9 so as not to block the insertion hole 16 formed in the boss 2.
.Ltoreq.1.6a.

In the above, the boss 2 is not directly joined to the wheel body 4 but is attached to the fixture 3 integrally joined to the wheel body 4, so that the shape and shape By fixing an appropriate one of the plurality of types of bosses 2 corresponding to axles having different dimensions to the mounting fixture 3, it is possible to cope with various specifications without manufacturing the entire agricultural wheel 1 each time. become,
This contributes to a reduction in manufacturing costs. In addition, since the rim 5, the wheel body 4 and the attachment 3 can be formed into a fixed shape for the wheels 1 of the same size, they can be integrally joined by using one type of joining jig 20, and thus, In addition, the manufacturing cost can be reduced.

In the above description, the attachment 3 and the boss 2 may be fixed by welding.
As shown in FIG. 6, the mounting fixture 3 and the boss 2 may be fixed together by bolts 27 for fastening together. Further, as shown in the figure, the inside of the cylinder of the fixture 3 may be formed in a polygonal shape such as a hexagon, and the outer surface of the boss 2 may be formed in a polygonal shape that can be fitted in the fixture 3. Alternatively, the outer surface of the fixture 3 may be formed in a polygonal shape. The spoke 9 may be formed such that its root portion is tapered. Also in this case, the length L in the axial direction of the fixture 3 is defined as a ≦ L with respect to the outer diameter a of the root portion of the spoke 9.
It is preferable to set ≦ 1.6a.

The design of the present invention is not limited to the above-described embodiment, but can be changed as appropriate. For example, the arrangement and shape of the lugs of the elastic ring, the shape and the number of spokes, and the like can be changed as appropriate, and the joining jig is not limited to the above embodiment. Further, the present invention is not limited by the presence or absence of the reinforcing plate. Further, the elastic ring can be of a hollow or solid type to be assembled to the rim.

[0018]

As described above in detail, according to the present invention, if the agricultural wheels are of the same size, the corresponding bosses can be attached to the fixture without manufacturing the entire agricultural wheels each time according to the shape of the axle. The rim, wheel body, and fixture can be fixed using a single type of joining jig, so that agricultural wheels can be manufactured efficiently even with a small amount of various types, and costs can be reduced. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part according to a first embodiment of the present invention, in which (a) shows a state before a boss is attached to a fixture, and (b) shows a state after the boss is attached. It is.

FIG. 2 is a side view of the agricultural wheel.

FIG. 3 is a plan view of a joining jig.

4A and 4B show another embodiment of the present invention, wherein FIG. 4A is a perspective view of a main part, and FIG. 4B is a view taken along the line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Agricultural wheel 2 Boss 3 Fixture 4 Wheel body 5 Rim

Claims (3)

[Claims] 1. An annular rim (5), a wheel body (4) disposed on the inner periphery of the rim (5), and a center portion of the rim (5) and the wheel body (4). And a boss (2) mounted on the axle of the traveling vehicle is fixed to the mounting (3) integrally with the mounting (3). Agricultural wheels. 2. The agricultural wheel according to claim 1, wherein the attachment (3) is formed in a cylindrical shape, and the boss (2) is fitted in the cylinder and attached thereto. . 3. A plurality of bosses (2) corresponding to different axle shapes having the same outer surface shape so that each of the bosses (2) is configured to be able to be fitted into the mounting member (3). The agricultural wheel according to claim 2, characterized in that: