JPS58221702A - Hollow tyre wheel - Google Patents

Abstract

PURPOSE:To stabilize driving power and prevent vibration by forming side projections on every certain number of projections on a hollow tyre for a walk-type rice planting mechine and by making the deflection of the projections with a blade approximately equal to that of the other projections so as to mostly uniformalize the deflection of a tyre throughout its circumference. CONSTITUTION:The first blade 12 consists of a large blade A which is disposed on the forward side in the travelling direction, and a small blade B which is disposed on the rear side, both blades A and B cross each other at a top C, forming a mountain-like shape with a projection D in the middle of the top in the width direction. The external diameter of the top face of the projection D is made equal to that of the top face F of the second projection 13 and in addition, the deflection of the first projection 12 including a blade part 12a is also made approximately equal to that of the second projection 13. A tyre wheel 1 is thereby deflected approximately equally throughout the circumference thereof, aiming at stable driving and prevention of vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hollow tire wheel used for a walking type rice transplanter.

This type of hollow tire wheel generates a strong driving force when moving forward, and has a large number of protrusions on its outer periphery, and blades are formed at every predetermined number of protrusions.

In conventional hollow tire wheels, all protrusions are approximately the same.
The shape of the protrusion is similar, and therefore the protrusion that forms the wing has a higher rigidity corresponding to the wing, and the amount of deflection under the same load is smaller. As a result, the amount of deflection of the wheels changes while the vehicle is running, making the driving force unstable and decreasing, causing vibrations in the machine, such as a rice transplanter.

In view of such problems with conventional wheels, the present invention makes the amount of deflection of the protrusion including the vane part, among the many protrusions, approximately the same as the amount of deflection of the other protrusions. To provide a hollow tire wheel that exhibits normal driving force and does not generate vibration by making the amount of deflection around the entire circumference of the wheel approximately equal.

The feature of the present invention for achieving this purpose is that in a hollow tire wheel made of nine elastic materials, a large number of protrusions are formed on the outer periphery at approximately regular intervals, and in which direction the protrusions are formed at regular intervals. A winged protrusion is formed that has a protruding wing portion and has approximately the same amount of deflection under the same load as other protrusions.An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 to 5, (1) is a hollow tire wheel that is attached to the drive shaft of this machine such as a rice transplanter, and the boss member (2)
Four spokes (3) are radially welded to the disc (
4) Reinforce with the spokes (31) and attach the tire body (7) to the fixing members (5) (6) provided at the outer ends of the spokes (31) (8)
The wheel frame member (9) is constructed by the spokes (3) and the fixing devices (5) and (6).

The tire body (7) has many protrusions α at regular intervals on the outer circumference.
It has a D (lug) and is made of an elastic material such as rubber with a hardness of about 80 degrees, and is hollow inside and used at an air pressure of about 21 degrees.

The protrusions 0 consist of first protrusions having wing portions (12a) projecting in the left-right direction at regular intervals (six in the example), and second protrusions α3 having no other wing portions (t2a)1.
Both protrusions a3aa are balanced in terms of strength, and have approximately the same amount of deflection under a constant load.They prevent vibrations from being applied to the machine, and the blades (heavy top) provide driving force and Constructed to increase buoyancy.

The tire body (7) includes a crown part α9 in which a protrusion I is formed, shoulder parts Of at both left and right ends of the crown part α9, and each shoulder part N
It has a sidewall part node extending radially inward from the shoulder part u6, and a bead part (2) extending radially inwardly from the radially inner end of each sidewall part 0η, and the crown part From (2) to the middle of the α force on both sidewalls, it is almost the same.
, and an inclined inner surface θ9 is formed from the middle of this sidewall part α to the inner end on the bead part side.
The corner portion (■) from each sidewall portion αη to the bead portion (2) is within the thickness.

The mounting member (8) is composed of a pair of left and right annular rigid members (c) made of metal or hard snacks, etc., and the rods of these rigid members have the same shape and are arranged mirror-symmetrically, so that the buried part (a) and a mounting portion (b).

The buried portion (B) has a hook-shaped cross section and is buried from the inner end of the bead portion c181 to the thick corner portion. This embedding is performed by vulcanizing, for example, 140 to 18011, and the hook shape also works to fix it to the tire body (7).

The mounting part (b) has a straight cross section, protrudes radially inward from the bead part (end), and has a large number of holes drilled in the circumferential direction, one mounting part (22b) K. is the bead part (to)
Karahole cl! A sealing portion (to) which is clamped between the other mounting portion (28b) and the other mounting portion (28b) is provided between the first and second mounting portions. This seal part (to) is integrally molded with the bead part (to) or formed separately and baked, and is an annular protrusion with two fc strips, which fastens both parts (s+2b) (gsb) of the rigid member. As a result, the bead portions (2) are compressed to form a seal between the two bead portions (2), thereby ensuring airtightness of the four tire bodies (7).

As shown in Fig. 5, the tire body (7) is formed into a shape in which the rigid member (C) is embedded and both bead parts (to) face each other with a gap (to), and both the bead parts (to) are formed in such a shape that the two bead parts (to) face each other with a gap (to). z2b) (2s
b) to close the gap ■, and in that state, attach the fixture (
5) Fasten to (6) with bolts, rivets, etc.

The fixtures (5) and (6) have the same shape and holes, and the fixtures (5) are welded to the outer ends of the spokes (3) so that the
Fixtures (5) (6) Both mounting parts (22b) (2sb)
Clamp and tighten by inserting hole e241HKboA/) (to) or rivet, etc. At the position where the fixtures (5) and (6) are not provided, only the attachment portions (22b) and (28b) are fastened with ports or the like. In this fastened state, the seal part (to) is connected to both V1
11 member (c) to seal between both bead portions (to). In this state, the inner circumferential surfaces of both bead portions are at a required angle that does not lift mud.

The symbol - shown in Fig. 4 is a pulp for air injection extending through the bead part (Q7), and this pulp holder is attached to the sidewall part Q7.
It may be installed through 1. The protrusion I
To explain in more detail, the first protrusion hit is in the forward rotational direction G
υ has a leading side large feather (~) and a trailing side small feather (B). A protrusion is formed at the center in the width direction, and the outer diameter of the top surface of this protrusion is the same as the outer diameter of the top surface (F) of the second protrusion.

The large blade (7!) extends obliquely from the top (0) to the lower end of the sidewall part αη of the tire body (7), that is, the corner part (A), and extends sufficiently to the side from the sidewall part Q71. It protrudes and is configured to increase driving force and buoyancy during forward movement.

The small blade (to) has an apex portion (extending obliquely from Q to crown portion α51, and has the same amount of lateral protrusion as large blade 4) to increase the driving force and buoyancy during backward movement. This small feather (B
The outer side of the sidewall portion aη between the sidewall portion Aη and the large blade 4 is a space concave portion.

The second protrusion 0 has a hexagonal shape when viewed from the front, and its width is approximately the same as the outer end width of the sidewall portion αη.
The width of the top surface (F) of the first protrusion is 0.
The protruding part (has the same width as the top surface of the part).

This second protrusion 0 has a longer circumferential length than the first protrusion (2), and its entire portion substantially supports the load.

In contrast, the first protrusion @ supports the load by contacting the ground including the blade part (121&), but the load is weakly supported at both ends of the first blade part (12B), and in reality, the center part and the blade support the load. (12B).

The cross-sectional area (Qj) (Q!) shown by the imaginary line in Fig. 5 indicates the sudden load bearing area of the first and second protrusions 03 (13) at the position C in Fig. 2. (2) has a short circumferential length and a blade portion (1!11), so the cross-sectional area (Ql) is horizontally long, and the cross-sectional area (Ql) is approximately the same as the cross-sectional area (Q2). That is, since the first protrusion @ has the wing portion (12Il), its length is shortened so that it has approximately the same load supporting force as the second protrusion 03.

By making the load supporting forces of the first and second projections α3 approximately the same, the amount of deflection of both projections α3 is also approximately the same under a constant load, and the tire wheel (1) is It deflects approximately evenly, allowing smooth rotation without causing vibration to the machine while driving.

FIG. 9 shows a second embodiment of the present invention, in which the tire body (7) including the protrusions is made of elastic material such as rubber mixed with organic short fibers such as nylon or polyester. It is made of wood to increase its rigidity.

In addition, holes (to) are formed at intervals in the circumferential direction in each buried portion (al) of the rigid member Q2w, and holes are formed in the tire body (7).
The elastic material forming the hole passes through the hole and prevents the rigid member from detaching from the tire body (7).

According to this, although the buried portion (81) may have a straight cross section, if it has a hook cross section, the secondary member c!2 (c) can be more perfectly prevented from detaching due to both effects.

Furthermore, the first protrusion U is not provided with a protrusion, and the top surface has the same outer diameter as the top surface (F) of the old second protrusion, and the width of one blade part (12&) is smaller. .

A bulging part (2) is formed at the opposing inner ends of both bead parts (to), and the rigid member c2 (c) is pressed against the wheel bone member (9).
), both bulges of υ1 are pressed against each other and the sea μ
The structure of this second embodiment is similar to the hollow tire wheel (2) of the first embodiment.
1) can be applied as appropriate.

In the third embodiment of the present invention shown in FIG. 10, the tire wheel (1) 1'' is shown as an example in which the tire body (7) is fixed to the rim (to).The rim (to) is connected to the spokes (3). ) is welded to the outer end of the rim (2), and engages with the retaining part (to) formed on the inner peripheral surface of both bead parts (to) of the tire body (7). Even in a tire wheel to which the main body (7) is fixed, the zero tapping of the first and second protrusions shown in the first embodiment can be applied as is.

The following table shows specific examples of the hollow tire wheel (1) shown in FIG.

When the hollow tire wheel (1) shown in the above example was attached to a rice transplanter and used in a paddy field, uniform deflection occurred over the entire circumference, and no vibration was generated due to changes in the amount of deflection. Sufficient driving force and buoyancy were obtained. The present invention is not limited to the above specific example, and various settings can be made depending on the magnitude of the driving force, soil quality of the field, etc. In particular, the first and second 2 protrusions 02Q3 has a much larger driving force,
To exert buoyancy, etc. or strength.

The dimensions of each part are determined in consideration of the design, etc., and the deflection amount under a constant load is set to be approximately the same. The amount of deflection of the protrusion @ including the blade part (x2a) is approximately the same as the amount of deflection of the second protrusion under the same load, so the amount of deflection around the entire circumference of the tire wheel (1) is Approximately uniform driving force can be obtained in a normal and stable state, and this machine, such as a rice transplanter, can run smoothly without vertical vibration.

[Brief explanation of the drawing]

1 to 8 show a first embodiment of the present invention,
Figure 1 is a side view, Figure 2 is an enlarged side view of the main parts, Figure 3 is an enlarged front view of the main parts, Figure 4 is a sectional view taken along the line IV-TV in Figure 1, and Figure 5 is the wheel bone. A cross-sectional view of the tire body to be fixed to a member, Figure 6 is a view in the direction of the ■ arrow in Figure 1, and Figure 7 is a view in the direction of the ■ arrow in Figure 1.
8 is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 9 is a cross-sectional view showing the second embodiment of the present invention, and FIG. 10 is a cross-sectional view showing the second embodiment of the present invention. It is a sectional view showing an example. (1)...Hollow tire wheel, (7)...Tire body, (8)...Mounting member, (9)...Wheel bone member, α
υ...Protrusion, 0...First protrusion, (1211)...
Wing part, 03...second protrusion, ■(c)...rigid member,
Tao...large feather, no]...small feather.

Claims (1)

[Claims] 1. A hollow tire wheel made of an elastic material in which a large number of protrusions I are formed on the outer periphery at approximately regular intervals, and at every fixed number of the protrusions, there are blades (12 &) projecting laterally, and other The amount of deflection under the same load is approximately the same as that of the protrusion (to).
A hollow tire wheel characterized in that four protrusions with wings are formed.