JP2003002007A - Solid tire wheel assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in a solid tire wheel wherein disposal is difficult and a manufacturing cost is high. SOLUTION: A solid tire 2 engaged with a rim 3A of a wheel body 3 is constituted of tire segments 4 divided radially, and can be assembled or disassembled by a fastening tool 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a solid tire wheel assembly.

[0002]

2. Description of the Related Art There are so-called rubber-baked wheels, pneumatic tire wheels, etc. as tire wheels of agricultural machines (referring to rice transplanters, tillers, medium-powder weeders, etc.). Examples of rubber-baked wheels include Japanese Patent No. 3105387. No. 3,073,315, No. 2,774,692 and the like are known, and those in which a foam is included in this wheel are also known in Japanese Patent No. 3136168. Further, as a tire wheel for a snow vehicle, a buggy vehicle, etc., a pneumatic tire having a block pattern tread is known from Japanese Utility Model Publication No. 7-28003.

[0003]

A conventional rubber-baked wheel,
All pneumatic tire wheels and the like have a common problem that the manufacturing cost is high. In particular, for rubber-baked wheels, the cost of the mold is enormous because the wheel size is large and many types are manufactured in small quantities depending on the type and application of agricultural machinery (whether paddy field or field operation). In addition, it is possible to manufacture with a normal press die up to a wheel outer diameter of about 1 m, but a very large press die is needed to make a product (wheel) of more than 1.5 m, 2 m, for example. It wasn't something that even the makers of.

Further, in a rubber-baked wheel, the rim and the spokes (disks or wheels) are made of iron (metal), and the rubber is vulcanized and adhered to the rim. Therefore, the tire is made of rubber, for example, rubber. A part of the tire of
If scratches etc. occur, it is necessary to discard the whole, and moreover,
Since all the wheels made of iron and rubber are integrated, the disposal process is very troublesome, and this problem has been a common problem for pneumatic tire wheels. Therefore, the present invention configures a rubber tire (including a resin) as a solid tire and has a plurality of tire segments, so that even if a part of the tire is chipped or scratched, the tire can be partially replaced. The first purpose is that it is possible and can be manufactured even with a normal press die.

Further, a core material is included (vulcanized and bonded) in a tire segment and fitted in a rim groove of an iron (metal) rim using this core material to easily and easily form a rubber portion and an iron portion. The second purpose is to firmly and freely assemble and disassemble, which is economical in terms of disposal (based on partial replacement) and advantageous in product (remaining stock) management.

[0006]

The present invention is directed to an annular rim 3A.
In the rim groove 3B formed on the outer periphery of the rubber solid tire 2
In order to achieve the above-mentioned object, the following technical means are taken. That is, the solid tire axle assembly 1 according to claim 1
The solid tire 2 is composed of a plurality of tire segments 4 which are radially divided.
Further, the core material 5 having the fastener 6 that can be fastened and loosened from the inner side
Each of the tire segments 4 encapsulated and vulcanized and fitted in the rim groove 3B is attached to the rim 3 by the fastener 6 so as to be assembled and disassembled, and the rubber solid tire is attached to the outer periphery of the annular rim 3A. It is characterized in that 2 is fitted.

Since the rubber solid tire 2 is divided into a plurality of tire segments 4 as described above, it can be manufactured by an ordinary press die, and the length of the segment 4 in the circumferential direction is small. It can be 10 to 50 cm, and the cross-sectional width (cross-sectional shape) depends on the intended use, for example, 3 to 1 for rice transplanters.
It can be about 0 cm, about 10 to 50 cm for tractors and cultivators, and can be partially replaced even if a part of the segment 4 is chipped. Further, since the core material 5 is included in the rubber tire segment 4 and vulcanized and bonded, the strength of the rubber segment 4 is sufficiently secured, and the segment 4 is fitted into the rim groove 3B and fastened. When attaching with the tool 6, the fastening force is sufficient and even the segment 4 does not come off from the rim groove 3B, and the fastening can be done from the inside of the rim, so assembly and disassembly is easy and partial disposal is also possible. It becomes.

Further, in the above-mentioned claim 1, although the cross-sectional shape and the like of the tire segment 4 constituting the solid tire 2 can be set arbitrarily (freely), the tire segment 4 constituting the solid tire 2 is provided with a tread side. It is recommended that protrusions such as the lugs 7, the blades 9, the blades 10, the blocks 10 and the ribs 11 are formed to be raised (claim 2). By configuring in this way, a solid tire / wheel assembly 1 (advantageous for paddy field work and upland field work) can be obtained according to the intended use, and a rim 3A having the same rim groove 3B shape (perimeter, diameter) can be provided. Wheels with (iron part)
It is possible to use this iron part in common and replace the rubber part with different protrusions to use it for paddy fields and upland fields.

Further, in the above-mentioned claim 1 or 2,
It is recommended that the tire segment 4 constituting the solid tire 2 contains the foam 4E and is vulcanized and adhered (claim 3). As a result, traveling vibration can be reduced and the maneuverability of the operator is not impaired. Further, in the above-mentioned claims 1 to 3, the tire segment 4
Although the circumferential end surface of the tire segment 4 may be a flat contact surface, the circumferential end surface is formed with male / female joint portions 4B and 4C, and the tire segment 4 fitted in the rim groove 3B is formed. Are preferably joined in the circumferential direction via the male / female joints 4B, 4C (claim 4).

With this structure, the tire segment 4 can be reliably prevented from being detached from the rim groove 3B (rim disengagement).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Some embodiments of the solid tire wheel assembly according to the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of a solid tire wheel assembly 1, which is a solid tire 2 made of rubber (elastic material including resin) and an outer periphery of an annular rim 3A. It is mainly composed of an iron (metal) wheel body 3 into which the tire 2 is fitted in the rim groove 3B formed in the above.

The wheel body 3 has a mounting portion for an axle of an agricultural machine or the like at the center thereof (a boss 3C is shown in the drawing, but may be a mounting seat), and the ring rim 3 is radially extended from the boss 3C.
1 shows a so-called spoke type wheel body having a spoke 3D fixed to A by welding or the like. However, the wheel body 3 may be a wheel type or a disc type. Solid tire 2
Is composed of tire segments 4 that are radially divided as shown in FIG. 1, and the segment 4 has a circumference of 10 to 50 cm.
It is desirable that the circumferential lengths of the segments 4 are the same and are equally distributed in the circumferential direction on the annular rim 3A, but the circumferential lengths do not have to be the same and are integer multiples. May have different circumferences.

Since the solid tire 2 is radially divided, the circumferential end surface 4A of each segment 4 is on the radial line. Therefore, as shown by the arrow A in FIG. Can be fitted (fitted) in and removed from the rim groove 3B. A core material 5 having a fastener 6 is included in each rubber segment 4 and vulcanized and adhered thereto, and each segment 4 can be manufactured as a small article by using an ordinary press die, Therefore, it is easy to manufacture and is advantageous in terms of management of the remaining stock. The core material 5 is a metal (steel, iron, aluminum, etc.) strip plate,
It is made of a rod material, a pipe material, a shape material (I type, H type, etc.), etc., and is shown as a steel strip plate (plate material) in the first embodiment, and its plate surface is set to the inside and outside in the radial direction. A bolt as a fastener 6 is fixed to the lower plate surface (inner peripheral surface), and the bolt is exposed in the radial direction. Therefore, the segment 4 fitted in the rim groove 3B has a nut 6A on the bolt. Fastening and loosening can be done from the inside by screwing.

Since the core material 5 has only to have high rigidity, it may be an aggregate of steel wires (a belt-shaped body in which the wires are aligned) or a hard resin (preferably containing reinforcing fibers). Further, when the fastener 6 is a bolt, the bolt head 6B can be formed large as shown in FIGS. 11 and 12, and the bolt head 6B itself can be used as the core material. The rubber tire segment 4 is formed so that its inner peripheral surface fits (fits and closely contacts) the rim groove 3B, and as shown in FIG. 2, its tread portion 4A-1 and left and right side portions 4B. In -1, lugs 7 for pulling are formed in a staggered pattern on the left and right sides.

Further, as the fastener 6, a nut (female screw cylinder) 6A may be fixed to the core 5 as shown in FIG. 13, and in this case, the inner peripheral surface of the segment 4 is the rim groove 3B. The nut 6A from the inner diameter of the rim 3 and the bolt is fastened and loosened, and in any case, the bottom of the rim groove 3B corresponds to the fastener 6 and has an insertion hole 6C (FIGS. 7 and 7). It is desirable that the insertion hole 6C be closed and opened by a resin / rubber plug (not shown). Here, as shown in FIG. 1, the rim groove 3
Each of the tire segments 4 fitted (fitted) to B is attached to the rim 3A by fasteners so that they can be assembled and disassembled, and the rubber solid tire 2 is fitted to the outer periphery of the annular rim 3A. Since the solid tire 2 is composed of the tire segment 4, even if there is a partial failure (chip, scratch, etc.), the entire tire can be replaced as a part of the tire segment 4 and it is economical. With
Disposal and collection will be easy.

Although the rubber tire segment 4 may have a flat end surface 4A in the circumferential direction, it is possible to form the male and female joint portions 4B and 4C in the circumferential direction as shown in FIG. Adjacent segment 4 to male / female joints 4B, 4C
It is advantageous that the rim can be prevented from coming off by being fitted in the circumferential direction via. Since the male portions of the male / female joint portions 4B and 4C are made of rubber even if they protrude in the circumferential direction, when the final segment 4 is assembled (pushed) into the rim groove 3B, the male portions are elastic. Since it deforms, it can be incorporated without any problems. However, in order to make the assembling easier, the male portion 4B preferably has a tapered surface like a cone or a pyramid in the protruding direction. Further, in FIG. 4, the male portion 4B and the female portion 4C are formed separately on both sides on the circumferential end surface 4A, but it is also possible to form the male portion and the female portion on the end surface 4A in a mixed manner. good.

FIG. 5 and FIG. 6 show the second embodiment, the common points of the configuration and the operation already described are referred to by the common reference numerals, and the different points will be described below. In the radially divided tire segment 4 which constitutes the rubber solid tire 2, the wing 8 for towing or float together with the lug 8 for straight advancing or vibration absorption is protruded as a lateral protrusion on the side surface. Has been done. These blades 9 step on the mud while traveling in a paddy field to exert a large propulsive force and buoyancy. The blade 9 is illustrated as an inclined blade in the figure, but the blade surface is located on the radiation. It may be provided (a so-called vertical blade), one of the left and right side portions (a so-called single blade), or a staggered blade projecting alternately from the left and right sides.

The solid tire / wheel assembly 1 shown in FIG.
For a snow vehicle or a buggy vehicle, the solid tire 2 has a wide tread width (flat tire) and has a block pattern in which the block 10 is raised.
Further, in the radially divided tire segments 4 constituting the solid tire 2, a thin skin-like tire outer skin 4D contains a foamed body (made of foamed rubber or foamed resin) 4E and is vulcanized and adhered, and is hard. The wear-resistant rim base rubber 4F is encapsulated, and the core material 5 is encapsulated and vulcanized and adhered to the base rubber 4F.

The core member 5 shown in FIG. 7 is a strip plate (made of metal or hard resin) and is in the tire width direction (axle direction).
Is embedded in the base rubber 4F, the fasteners 6 exemplified by bolts are radially inwardly projected at both ends of the core material 5, and the wheel body 3 has a wheel shape or a disk shape. The core material 5 may be continuous in the circumferential direction of the tire segment 4 or may be embedded at intervals in the circumferential direction. Further, in the solid tire / wheel assembly 1 shown in FIG. 8, the tire segment 4 constituting the rubber solid tire 2 has a rib pattern in which the rim 11 is protruded on the tread thereof, and the others are as described above. Since it is common to the configuration, common parts are indicated by using common symbols.

FIG. 9 shows the tire segment 4 shown in FIG. 8 in which the foam 4E is included. For the solid tire / wheel assembly 1 shown in FIG. 8 or 9, for example, a tractor or the like is operated. It is used as a head wheel. Furthermore,
As shown in FIG. 10, it is possible to include the foam 4E in the tire segment 4 of FIG. 1 described above, and the assembly in which the foam 4E is included in the segment 4 in this manner (FIGS. 7, 9A and 9B). In FIG. 10), it becomes possible to reduce traveling vibration and the like. Further, FIGS. 11 and 12 show the bolt head 6B.
13 is a core material, and FIG. 13 shows that the nut 6A is embedded in the segment 4, and in FIG. 11 to FIG. 13, the common portions are shown by common symbols.

The embodiment of the present invention is as described above, but various design changes are possible. For example, on one or both of the upper and lower surfaces of the core material 5, a canvas (cloth sheet)
It is also possible to overlap with each other, and when the fastener 6 is embedded in a segment, the nut can be closed and opened by a rubber plug body, and the fastener 6 is a double nut (lock nut). It is free to adopt a form and to cover the exposed portion (inward protruding portion) of the fastener 6 with a detachable cap.

[0022]

As described in detail above, according to the present invention,
The wheel body and the solid tire are manufactured separately, and the solid tire is easy to manufacture as a small article as a tire segment, and this segment has an advantage that it can be partially replaced or partially discarded.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention together with an assembly procedure.

2 is a plan view of the tire segment of FIG. 1. FIG.

3 is a cross-sectional view of the tire segment of FIG.

FIG. 4 is a plan view showing another example of FIG.

FIG. 5 is a front view showing a second embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of FIG.

FIG. 7 is a cross-sectional view showing a third embodiment of the present invention.

FIG. 8 is a sectional view showing a fourth embodiment of the present invention.

FIG. 9 is a sectional view showing a fifth embodiment of the present invention.

FIG. 10 is a sectional view showing a sixth embodiment of the present invention.

FIG. 11 is a front view of a segment showing a seventh embodiment of the present invention.

12 is a cross-sectional view of FIG.

13 is a cross-sectional view showing another example of FIG.

[Explanation of symbols]

1 Solid tire wheel assembly 2 solid tires 3 wheel body 3A rim 3B rim groove 4 tire segments 5 core material 6 fasteners

Claims (4)

[Claims] 1. A solid tire wheel assembly (1) having a rubber solid tire (2) fitted in a rim groove (3B) formed on the outer periphery of an annular rim (3A), The solid tire (2) comprises a plurality of radially divided tire segments (4), and a core material (5) having a fastener (6) that can be fastened and loosened from the inner diameter side of the tire segment (4). ) Is included and vulcanized and bonded, and each of the tire segments (4) fitted in the rim groove (3B) is attached to the rim (3) by the fastener (6) so as to be disassembled and assembled, and an annular rim ( 3A) has a rubber solid tire (2) fitted around the outer circumference thereof. 2. A protrusion such as a lug (7), a blade (9), a block (10) and a rib (11) is formed on a tread side of a tire segment (4) constituting a solid tire (2). The solid tire wheel assembly of claim 1, wherein: 3. The tire segment (4) constituting the solid tire (2) contains a foamed body (4E) and is vulcanized and adhered therein. Real tire wheel assembly. 4. A male / female joint portion (4B) is provided on a circumferential end surface of a tire segment (4) constituting a solid tire (2).
(4C) is formed, and the tire segment (4) fitted in the rim groove (3B) has a male / female joint portion (4B) (4).
The solid tire wheel assembly according to any one of claims 1 to 3, wherein the solid tire wheel assembly is joined in the circumferential direction via (C).