JPS58209602A - Rubber tire for agricultural machine to be used at zero or very low inner pressure - Google Patents

Abstract

PURPOSE:To obtain stable running along a contour line or the like without unbalancing a main machine or the like on an inclined ground by shaping the essential contours of a tire almost into an octagon for increasing the horizontal rigidity to maintain good paddy-field capacity and drive power. CONSTITUTION:A rubber tire 1 is composed of a lug 2. a crown part 3, both shouler parts 4, both side-wall parts 5, and both bead parts 6. In this case, the shoulder parts 4 are lantingly extended at an angle alpha from both ends of the crown part 3 to the outside of the diametral inward width, and the slanting angle alpha is set at 20-60 deg.. Meanwhile, the bead parts 6 are extended at a slanting angle beta from the diameter inner end of both side-wall parts 5 to the inside of the diametral inward width, and the slanting angle beta is set at 15-60 deg.. In this construction, the essential contours of a tire composed of imaginary faces 14 connecting between above-said parts 3-6 and both bead parts 6 is shaped almost into an octagon, and the section of both side parts of the tire 1 is shaped into a C-letter for promoting horizontal and vertical rigidities.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to industrial machines such as rice and wheat harvesting and binding machines, which are commonly referred to as binders, and which are used at zero or extremely low internal pressure.
This article relates to rubber tires for agricultural machinery.

Low Tires that can be used with zero internal pressure are attracting attention.

However, even if these tires with zero internal pressure can achieve the desired wet paddy performance in wet paddy fields, the machine fluctuates greatly when moving the machine to the wet paddy fields, such as pintaters, etc., and especially when driving on slopes on high ground. , the machine slipped down the slope,
It has the disadvantage that it cannot be driven, which means that it is possible to fall into a btj field when driving on a ridge, which is a serious defect.

For example, the conventional tire C1fj (1983-
34086), it is possible to run on flat ground without any problem, but when running on a contour line on a slope shown in Figure 7 (H'), the lateral 1-11 property is weak, so the lower side of diagonal m1 gets tangled. . As a result, the aircraft was unable to travel on contour lines. In tests conducted in the present application, it was impossible to run on a contour line on a slope with an inclination angle of 10', and it was impossible to make a U-turn from downhill to uphill on a slope with an inclination angle of 5°. Figure 7 0) shows the state when no load is applied.

The conventional tire shown in Fig. 8
In the same manner as described above, in the case of the No. 04 publication, a lateral load is applied when running on an inclined surface, so that the lower rim flange becomes outside of the sidewall part and causes lateral slippage, making it impossible to run. Figure 8 (^) shows the state with no load.

In view of the gap between the layers of conventional tires, the present invention increases the lateral + qll properties while maintaining good wet paddy performance by making the outer contour of the tire substantially rectangular, thereby making it possible to drive on slopes. An object of the present invention is to provide a rubber tire for useless machinery that can be used at zero or extremely low internal pressure.

The special feature of the present invention for achieving this purpose is that the outer contour of the tire is substantially flat and has a round part,
Shoulder portions extend from both ends of the tire at an angle of 20 to 60 degrees in the radially inward and widthwise outward directions, and sides extend radially inward from the outer ends of each shoulder portion to form the maximum width of the tire. It is formed by a wall part and a bead part extending at an angle of 15 to 60 degrees in the radial direction width direction from the radial inner end of each sidewall part, and an imaginary plane connecting the radial inner ends of both bead parts is formed. The point is that the entire outer contour including the shape is approximately a rectangular shape.

fAJ, the present invention exemplifies a rubber tire with lugs, but it can also be applied to tires with lips or blocks in place of lugs, or tires with no lugs. Or it means the outline of a sumuuu shape excluding blocks etc.

Embodiments of the present invention will be described below with reference to the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 4,
The rubber tire (IIFi) before rim assembly consists of lugs (2), crown parts (3), both shoulder V parts (4), both sidewall parts (5) and both bead parts (6), and the whole is made of rubber ( (contains an elastic material with the same effect as rubber), and is used at extremely low internal pressure of zero or about 0.2 KP layer or less.

The crown portion (3) has an outer surface (3a) that is substantially flat in the tire width direction and a circular shape in the circumferential direction.
A large number of lugs (2) protrude from a). The puffer fish (2) are arranged in a staggered manner and are inclined so as to intersect with the center part (8) of the clarinet part (3).

The crown part (3) has a wall thickness (t8) of the center part (8) and a wall thickness (t9) of the lug forming part (9) (crown part (3)).
) is thick, and the lug (2) is set to a wall thickness that does not wobble, and the portion surrounded by each lug (2), center part (8), and shoulder part (4) is as follows: The thin wall portion 00 is thinner than the center portion (8) and the lug forming portion (9) and bulges in the radial outward direction, and its wall thickness (tio) is 0.2.
It is preferable that tjO/18≦0.5. This thin part αO traps soil when touching the ground and removes soil when leaving the ground, increasing the buoyancy effect and soil removal effect, and also allows the inclined lug (2) to become parallel to the axis of the tire (1). It is also possible to increase the driving force by allowing such deformation.

The shoulder portion (4) extends from both ends of the crown portion (3) in the radial direction and width outward direction at an angle (α), forming a planar inclined surface, and the angle (α) is 20-60
degree, and 50 to 45 degrees is optimal.

A sidewall portion (5) extends radially inward from the outer end of each shoulder V portion (4), and this sidewall portion (
5) is planar and forms the maximum m (T) of the tire (1). Furthermore, from the shoulder portion (4) to the sidewall portion (5), the inner surface thereof has a lug forming portion (9).
) is formed with an inner shape-retaining rib u]J at an extended position directly below the lug (2). By locally reinforcing the shoulder portion (4) and sidewall portion (5) at the locations corresponding to the lug (2), the support strength of the lug (2) is increased, improving maneuverability and maneuverability. The tropism can be made stable and smooth.

From the radially inner end of each sidewall portion (5) is a bead portion (6
) extends in the meridional and widthwise direction with an inclination angle of 0,
The outer surface of the inner end portion serves as a rim attachment surface 0, and a bead reinforcement engagement recess α3 is formed on the outer circumferential surface of the inner end portion. The inclination angle φ) is 15-6o0, 20-45
° is optimal.

From the bottom of the sidewall part (5) to the bead part (6)
The overall length in the circumferential direction is approximately the same thickness as that of the internal shape-retaining blade, making it an integral piece with sufficient strength.

The shoulder portion (4) is thinner than the sidewall portion (5), and the lug forming portion (9) of the crown portion (3) is thinner, going from the crown portion (3) to the peal portion (6). Accordingly, it is thick and rigid.

Assuming a false rock surface α4 connecting both bead parts (6), the crown part (3), both 7 yorta parts (4), both tweed 1 qual parts (5), 1 both ped parts (6), and the virtual Surface α
The actual tire outer #M contour shape consisting of fathom is roughly square, and in particular, the cross-sectional shape of both sides of the tire (11) is horizontally trapezoidal, so the horizontal thinness and vertical -1j characteristics are Hatake
It has become.

Figure 4 (mu) shows a tire (
1) is shown when the valve is not loaded. When running on a flat road or in a wet field, the machine is compressed in the radial direction as shown in Figure 4 (B) due to the load of the machine, and on a hard road only the lug (2) is in contact with the ground. However, the load is transmitted to the lug (2), crown part (3), shoulder part (4), sidewall part (5), and bead part (6), and in wet rice fields, the lug (2) goes into the mud. The entire crown part (3) is also subjected to load motion due to #l oblique traction (α) ψ)
, in particular, deforms so that the inclination angle (α) becomes small, and the lug (2) touches the ground I11 at the total length g @ %, -, so
The wet field performance is good, the driving force can be sufficiently exerted, and the buoyancy and earth removal effect due to the thin wall α OK are also effective.

Figure 4 (C) shows the condition when driving on a slope, and the tire (1
) are always on the outside of the rim 09, and due to their high lateral rigidity, the rim α9 is less likely to shift in the width direction from the crown part (3), and due to its high vertical rigidity, the bead The part (6) does not come into contact with the inner surface of the crown part (3), and the machine can run without flaking.

In the first embodiment, the shoulder part (4) and the bead part (6) are formed flat, but they may be slightly uneven. 1
) increases in lateral stiffness.

In the second embodiment of the present invention shown in FIGS. 5 and 6,
This tire Qυ has a planar shape of the rub (A), a shoulder V part (
C) and the sidewall portion (C) are different from those of the first embodiment.

It is formed from the lug removal center part (8) to the shoulder part (4), and is inclined so that the center part (8) side is in front. , the driving force can be further increased.

In addition, the sidewall part (C) is an arcuate wall with a large diameter curvature that bulges out in the outward direction, and there is no shape-retaining lip on the inner surface, and the wall thickness is approximately the same from the upper end to the lower end. The shoulder part (to) is also thicker than the shoulder part (4), making it easier to deform under load.
The lateral f411 characteristic in the width direction is more relaxed, and the rim (
(to) and the crown portion (3) are more reliably prevented from shifting in the lateral direction.

The following table shows the tire (1) eυ shown in the first and second embodiments.
A test example is shown.

Three tires (1) (1) t2υ was the result of a uniform running test on a slope with an inclination angle of 10 degrees and an IJ turn test on a slope with an inclination angle of 5 degrees with one attached to the binder. There was no fluctuation or slippage of the binder, stable running was possible, and no phenomenon of the sidewall part (5) being inside the rim α9 was observed.

According to the present invention described in detail above, the shoulder portion (4) is moved 20 to 60 mm from the end of the crown portion (3) in the radially inward direction and the width outward direction.
The bead portion (7) is extended at an angle of 15° to 60° in the radially inner direction from the radially inner end of the sidewall portion (5).
The tire is installed at an angle of 100° and the outer profile of the tire is roughly square, so by using it at zero internal pressure or extremely low pressure, it maintains the same wet paddy performance and driving force as conventional zero internal pressure tires. In addition, the lateral rigidity has been increased, making it possible to perform straight-level driving on slopes and U-turns in a stable state without the machine becoming unstable or slipping. It allows you to drive with peace of mind and significantly improves on-road performance.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention,
Figure 1 is a cross-sectional view, Figure 2 is a plan view, Figure 3 is Figure 2.
-1u line sectional view, Figure 4 (h), (s), and (c) show the state of the tire when it is unloaded, when it is loaded on flat ground, and when it is loaded on slope, respectively.
4, FIGS. 5 and 6 show a second embodiment of the present invention, FIG. 5 is a cross-sectional view, FIG. 6 is a plan view,
Figures 7 and 8 show conventional examples, and Figure 7 (A)
FIG. 8(A) is an explanatory view showing the state when there is no load, and FIG. 7(B) and FIG. 8(B) show the state when being loaded on a slope. +11...Rubber tire, (2)...Lug, (3)...
・Crown part, (4)...Shoulder fa, +5+・
...Side wall part, [61... Bead part, (5)
...Rim, 1211...Tire, (B)...Angle, (/9)...Angle. Patent Applicant Otsu Tire Aji Shikisha Figure 7 3 1.4 21.4 Procedures Amendment (voluntary) September 10, 1980 1 Table of 1'l J 1988 Patent Application No. 95640 No. 2
Relationship with the case of a person who makes agricultural and mechanical rubber tires 3 supplementary 11 that are used with zero internal pressure or very low internal pressure Patent applicant Otsutaiya Shikikai 1 to 1 representative 8577 Detailed explanation of the invention in the specification Column 7 of the amendments d Next Collection 7, Contents of the amendments (1j The text "Fig. 1" on page 2, line 14 of the specification is amended to read "Fig. 1 Fig. 7." i2) In lines 16 to 14, it says ``compression property'', and it is corrected to ``pressure r4 deformation.''
"It's a certain amount of time," he corrected. (4) On page 8, line 15 of the same page, replace the phrase “love prisoner” with “
Lag prisoner,” he corrected. (6)” On page 9, line 6 of the same page, replace “Shorgbe amount” with “
It is corrected as "Peed section (6)". (6) In the 5th line of page 11, the phrase "peed section (7)" is corrected to "peed section 16)."

Claims (1)

[Claims] 1. The outer contour of the tire is substantially flat and the round part (
3) and 20 to 60 mm in the radial inward direction and width outward direction from both ends thereof.
Shoulder portions (4) extending in an inclined manner at an angle of °; sidewall portions 1151 extending radially inward from the outer ends of each shoulder portion (4) to form the maximum width of the tire; 15 in the radial direction width inward direction from the radial inner end of part (5)
Tilt at an angle of ~60°. An imaginary plane α4 connecting the radial inner ends of the extended bead portion (6) and the n% circular bead portion (6)
1'f! : A rubber tire for industrial machinery used at zero internal pressure or extremely low pressure, which is patented in that the entire outer contour is approximately rectangular.