MXPA97001834A - Rim for low pressure vehicle for all types of territories - Google Patents

Abstract

The present invention relates to a low pressure ATV pneumatic rim and a wheel in combination, the rim comprising: a pair of axially spaced bead cores, wherein each of the bead cores has wire filaments placed one with respect to the other. others to form a base side, a radially outermost side, first and second sides extending between the base side and the radially outermost side, the base side being substantially linear, the width of the base side remaining the bead cores between greater than 6.35 mm and smaller than 9.14 mm, and the internal diameter of the bead core, when measured on the base side, is d a frame having at least one layer, the layer having a central portion and side edge portions, each side edge portion being bent axially and radially outwardly around one of the bead cores, and a bead heel surface, the surfaces being of heel heel radially inwards of one of the bead cores and remaining in interface with the associated rim wheel, the heel heel surface having a length, and the wheel comprising: a hump and a wheel flange, having the The wheel flange has an axially inward surface, with the distance between the hump and the surface axially inward from the bead seat wheel, with the length of the heel heel surface remaining between 80% and 125% of the seat length of heel, the hump having a diameter Dh and where the internal diameter d of the bead core is on the scale of less than 0.51 mm greater than Dh to 0.76 mm less than

Description

RIM FOR LOW PRESSURE VEHICLE FOR ALL TYPES OF LAND BACKGROUND OF THE INVENTION The present invention relates generally to ATV, and more specifically to pneumatic tires designed to remain fixed to and in operative association with the vehicle wheel even during deflation of the tire. Some varieties of these tires include devices designed to support a vehicle when the tire loses inflation pressure. These tires are commonly referred to as "flat plane" tires.

Description of the Prior Art A basic problem with pneumatic tires is that the tire operation depends on the retention of air to pressure inside the rim. During a condition where the pressure on the tire escapes, such as when the tire is struck down, the operation of the tire can quickly decrease. In most cases, the vehicle can only handle a very short distance before it becomes inoperable. Due to this deficiency, tire designers have long sought to develop a rim capable of providing good handling and operation characteristics even during deflation of the rim. One of the key problems in providing such continuous function during deflation is that of retaining the wheel rim. Since the rim is normally retained on the wheel by the pressurized air inside the rim which pushes the rims and sidewalls of the rim towards the wheel flange, the exhaust of the pressurized air through puncturing or Another road hazard eliminates the pressure? triple Absent this pressure, the tire tends to be disconnected and disassociated from the wheel and control of the vehicle becomes more difficult. Previous efforts to address this deficiency have required a special combination of wheel / 1 lanta. Due to various reasons this solution has not proven to be acceptable. One of the main reasons for the ineffectiveness of the solution is the high cost of the special wheels that were required. These tire / wheel combinations typically can cost several times the cost of the typical tire and wheel combination. Other rim / wheel combinations required special procedures and / or assembly equipment. As such, they have never been commercially acceptable. There was a need for a new tire for low pressure vehicles, for all types of terrain, that could remain connected to a conventional wheel, even in a deflated condition, without the requirement of a special wheel. In other words, an ATV rim that could be mounted to any conventional wheel, but retained on the wheel during tire deflation and will continue to provide acceptable driving performance for an acceptable distance. Efforts by others to address this need for ATV tires are described in U.S. Patent Nos. 4,940,069 and 5,186,772. In addition, various other efforts related to automotive tires have sought to develop a bead configuration having certain advantageous properties and configurations. For example, in US Pat. No. 4,203,481 a flat tire is described which is to be used in association with a special tire wheel. In United States Patent 1,914,040, a rim bead is described which has a rectangular configuration. In addition, in United States Patent 1,665,070, a rim bead having a triangular configuration is disclosed. In the commonly owned co-pending application, titled "A RIM (ATV) OF VEHICLE FOR ALL TYPES OF LAND, OF JA PRESSURE, OF OPERATION IN PLANO"; Serial No. 08 / 616.3 (Attorney's File No. DN1996-031), which is incorporated herein by reference, discloses an innovative ATV operating rim that utilizes the bead core of the invention disclosed in I presented.

SUMMARY OF THE INVENTION The present invention relates to a pneumatic rim 10 that can be used on a conventional wheel 22 and will be retained on the wheel 22 even after the deflation of the rim 10. The rim 10 of the invention is a pneumatic tire rim. radial or deflected, vulcanized, having a pair of such axially spaced ends. At least one layer 15 extends between the beads and is turned radially outward around the beads. The rim has a toroidal configuration. Each of the heels has a bead core 20 that purchase different coils of round wire filaments that are layered 20, 32, 34, 36 in the toroidal rim confined before vulcanization. , has a polygonal cross sectional area defined by imaginary line segments which contact the outer surfaces of the outer filaments 2 in the bead core 20. The bead core 20 is further characterized by the polygonal cross-sectional area having one side 44 of radially inwardly, one side 46 radially outwardly, a first side 48 and a second side 50. The sides 48, 50 first and second extend between the base side 4 and the radially outermost side 46. The first side 4 intersects the base side 44 in a first edge 54 to form an included acute alpha angle. The second side 50 intersects the base 44 at a second edge 56 to form an included acute beta angle, with alpha being equal to beta. In accordance with another aspect of the invention, the rim 10 of the invention can be used in connection with a wheel 22 having a flange 76 and a hump 80. The shoulder heel surface 60 on the rim 10 can be configured to have a length between 80% and 125% of the distance W between the robot 80 and a surface 74 axially inward of the flange 76, contributing to the rim 10 remaining on the rim 22 during a deflated condition. The wire filaments 26 in a first layer 30 of the bead core 30 can be configured so that a relatively large, rigid, first layer of filaments 26 can be constructed, further contributing to the retention of the rim 10 on the wheel. 20 during a flat tire condition.

Brief Description of the Drawings Other aspects of the invention will become apparent from the following descriptions when read in conjunction with the accompanying drawings, wherein: Figure 1 is a cross-sectional view of one half of a rim according to the invention, the tando tire cut along its equatorial plane; Figure 2 is a cross-sectional view of a bead core according to the invention; Figure 3 is a schematic view of the cross-sectional size core of Figure-2 with line segments drawn to show the perimeter, angles and graphical characteristics of the bead core of Figure 2; and, Figure 4 is an enlarged cross-sectional view of a portion of Figure 1 showing the core of such and bead area of the rim as it fits over an associated r-beam. Figure 5 is a cross-sectional view of the designed rim wheel.

Definitions The invention can also be better understood in the text of the following definitions, which are applicable to both the specification and the accompanying clauses: "Vehicle for All Type of Terrain (ATV)" is any motorized vehicle off-road, of 1270 mm or less in total chura, with a dry weight not loaded of 275 kgs or less, designed to travel on four low pressure tires, which has a seat designed to be assembled by the operator and manu-brio for control of address, and intended for use by one operator and no passenger. The width and weight will be exclusive of accessories and optional equipment. ATVs are subdivided into four categories as follows: Category G (General Purpose Model) ATV: An ATV intended for recreational and utility general use.; Category S ATV (Sport Model): An ATV intended for recreational use by experienced operators sun amenté; ATV Category U (Utility Model): An ATV intended primarily for utility use. ATV Category Y (Youth model): An ATV intended for recreational use off-road under adult supervision by operators under 16 years of age. Youth model ATVs can also be separated into cat gorges as follows: ATV Category Y-6: An ATV Category Y-6 is a youth model AT that is intended for use by children 6 years of age and older. ATV Category Y-12: An ATV Category Y-12 is a youth model ATV that is intended to be used by children 12 years of age and older. "Ratio between dimensions" of the rim means the ratio of its section height to its section width. "Axial" and "axially" are used herein to refer to lines or directions that are parallel to the axis of rotation of the rim. "Ruptor Belt or Structure" means at least two layers of parallel strings, woven or non-woven, that lie below the tread, not anchored to the heel and that have both left and right rope angles in the scale of 17 degrees at 27 degrees with respect to the equatorial plane of the 11th for radial layer rims and within 35 of the angle of the offset layer strings on a biased rim. "Bias Layer Tire" means that the reinforcing cords of the frame layer extend di agonly through the rim from bead to bead at an angle of about 25-658, the layer cords running at opposite angles. in alternate layer. "Frame" means the rim structure apart from the tread structure, tread, lower tread, and sidewall rubber on the sides, but including the heel. "Equatorial plane (EP)" means the plane perpendicular to the axis of the rotation rim and passing through the center of its tread. "Internal" means the inside of the tire. "External" means to the outside of the tire. "Pneumatic tire means a mechanical device with a generally toroidal shape (usually toroidal open) that has heels and a tread band and made of chemical products, cloth and steel or other materials." When mounted on the wheel of a vehicle of engine, the tire through its tread provides traction and contains the fluid that holds the vehicle's load. "Radial" and "radially" are used to give direction directions radially toward or away from the axis of rotation of the 11th. "Radial layer rim" means a pneumatic tire with a band or circumferentially restricted in which the layer strings extending from bead to heel are stretched to rope belts between 65 degrees and 90 degrees with respect to to the equatorial plan of the rim. "Section height" means the radial distance from the nominal rim wheel diameter to the maximum outer diameter of the rim on the contour surface. act of the road closest to its equatorial plane 1. "Section Width" means the maximum linear distance parallel to the axis of the rim and between the outside of its side walls when and after "it has been inflated under pressure". not bad for 24 hours, but unloaded, excluding elevations of the side walls due to labeling, decorations or protective band. "Side wall" means that portion of the rim between the tread and the heel. "Tread band" means a molded rubber component that when attached to a rim housing includes that portion of the rim that is brought into contact with the rim when the rim is normally inflated and under normal load.

"Bearing Band Width" means the arc length of the tread surface in the axial direction, i.e. the plane passing through the axis of rotation of the tire.

Detailed Description of the Invention In the drawings the same numbers are used for the same components or articles in the various views. With particular reference now to Figure 1, a pneumatic tire 10 is illustrated. The preferred embodiment of the invention has been successfully incorporated into all-terrain vehicle tires of sizes AT23X7-10, 22x8.0-10NHS and 22x 11.00-10NHS even though the invention is applicable to all types and sizes of vehicles. ATV tire. The pneumatic tire 10 comprises a band 12 of bearing a side wall 14, a frame 16, and a pair of annular tension members, commonly referred to as bead cores. In the preferred embodiment, the rim 10 includes one more flat operating devices 18 on the interior walls of the rim 10. It is believed that a rim incorporating the invention described below will remain in operative association with the vehicle wheel and wheel. of rim whether the positive d 18 of plane operation is present or not on the rim. For ease of ilsutration, only one half of the trowel 10 is shown, with the lantha being divided along its equatorial plane EP. With reference to Figures 4 and 5, the rim fits in and works in conjunction with an associated design wheel or rim wheel 22, which will be discussed later in this discussion. With reference to Figure 2, a preferred arrangement of the bead core filaments is shown. The bead core is shown in cross-section in Figure 2 and comprises a series of different wire filaments 26 arranged in layers. The bead core 20 is preferably comprised of layers, each layer having a continuous filament that is repeatedly entangled in an annular shape towards a ring. In other words, each of the filaments 26 shown in transverse section in Figure 2 is a portion of the same continuous filament wound to a layer other than the bead core 20. Although a single continuous filament is a feasible embodiment of the invention, it is believed that the invention can preferably be practiced more satisfactorily in the case of discrete, separate filaments wound into an annular configuration, said annular configuration being referred to as "beads". of band ". In the preferred embodiment, each layer of the core has the filaments comprised of a single strand of wire of 0.97 mm. which is individually coated with 0.10 mm d elastomeric material. Therefore, the filament 26 of the preferred embodiment has a total diameter of 1.17 mm. In the preferred embodiment, the bead core 20 comprises four layers 30, 32, 34, 36 of filaments 26. The first layer 30 is the most radially inward layer and comprises four to six filaments 26. The second layer 32 , the third layer 34 and the fourth cap 36 are radially outwardly of the first layer 30 and purchased from the same number of filament windings 26. It is important that the filaments of the adjacent layers 30, 32 are slipped together. The bead core 20 has a perimeter 42. The perimeter 42 comprises the segments of imaginary line segments which contact and tangent to the external surfaces of a base lad 44, a radially outermost side 46, a first side and a second side 50. The base side 44 is the radially innermost side of the bead core 20 and is approximately parallel to the rim rotation axis d as well as the mating surface of the rim 22. In the preferred embodiment, the first side 48 is axially into the second side 50, even though the relative orientation of the first and second sides 48, 50 is not believed to be ethical for the satisfactory practice of the invention. The first side 48 extends between the side 44 of bas and the radially outermost side 46 and intersects the base side 44 at a first edge 54. The first side 48 intersects the base 44 to form an included acute alpha angle. The second side 50 extends between the side 44 of ba and the radially outermost side 46 and intersects the base side 44 in a second edge 56, thus forming an acute ta angle included. In the preferred embodiment, the angle alpha and equal to beta. The perimeter 42 of the bead core 20 defines a cross-sectional area of the bead core. The area of the bead core of the invention is the area of a square or rectangle. In the preferred embodiment, the length of the base side of the bead number 20 is between greater than 6.35 mm and less than 8.69 mm. In the preferred embodiment, the length of the base side 44 of the bead core 20 is 7.62 mm. With reference to Figure 4, the rim 10 has a bead area that includes a bead surface 60. The heel heel surface 60 cooperates with the associated wheel 22. An important aspect of the invention is that the wheel 22 is the ATV wheel of conventional design as specified for the rim by industry standards, such as the Tire and Ri Association yearbook, which is incorporated herein by reference. referecy For example, the wheel used with the preferred embodiment of the rim in the sizes mentioned above is a dropped center, 5-degree "AT" rim wheel as specified in the Tire and Rim Association Yearbook. With reference to Figure 5, the wheel 22 comprises an axially internal surface 74 of the wheel flange 76. The wheel 22 also comprises a dropped center 82 and a safety hump 80 which remains axially inward of the wheel flange 76. The distance between the principle of the contour of the safety belt 80 and the surface 74 axially inward of the wheel flange 76 is referred to herein as the rim wheel seat 6 and has a width equal to a distance W. W distance is a standard for the various wheels designed for different vehicles. This information has been standardized in the industry and is available from the Tire and Rim Association Yearbook. In the design of wheels to be used with the preferred embodiment of the rim of the invention, it was equal to .400. With continuous reference to Figure 4, the rim 10 has a bead area that includes a heel surface 60. The heel heel surface 60 cooperates with and is the interface with the wheel 22. In the preferred embodiment of the invention, the width of the heel heel surface 60, given to me in the axial direction, is substantially equal at the distance W between the hump 80 and the axially internal surface 74 the wheel flange 76. This area of the wheel 22 will be referred to herein as the rim wheel seat 62. The width of the heel heels of the prior art tires was significantly less than the heel heel of the inv. The configuration of the bead core 20, together with the increased anchoring of the heel heel surface 60, causes the rim 10 to remain in operative association with the r 22, even in situations where such an uncommon operational association. , such as deinflado of the rim 10. Through tests of various designs, the request has learned that one of the key elements of the wheel design that keeps the rim 10 fixed to the wheel 22 in cases of tire deflation is the design of the base side 44 of the heel core 20 and the heel heel surface 60. Another key element of the design is the ratio of the width of the heel core to the width of the heel heel surface 60 to the distance W of the tire design between the hump 80 and the surface 74 axially towards the rear. of the vertical flange portion of the rim wheel 22. The prior art designs allowed significant variation in these two dimensions of the rim heel, allowing some slippage of the heel heel surface 60 of the rim 10 relative to the rim wheel seat 62 of the wheel 22. For example, the width of the heel core and talo heel of a conventional pneumatic ATV tire design of the previous technique was 5.08 mm and 8.89 mm respectively. The heel heel 60 of the rim of the preferred invention has a width of 12.70 millimeters and the bead core 20 in its b has a width of 7.62 millimeters. The area of the wheel 2 between the surface 74 axially inward of the wheel and the hump 80 is referred to herein as the rim wheel seat 62. Since the width of the wheel seat 62 of the ta (the distance W) is 10.16 mm, the preferred rim 10 has a heel heel width equal to 125% of the distance W. It is believed that the width of the heel heel 60 should be between 8 and 125% of the distance W so that the rim 10 remains in the wheel 22 during tire deflation. By slightly overfilling, or almost filling, the width of the rim wheel seat 62 with the heel heel 60, the portion axially further inside the heel heel 60 can be partly collocated on the hump 80, around the circumference of the heel 60 ta ta lón. Another important element of the rim 10 of the satisfactory invention is the width of the first layer 30 of the bead number 20. The inventors believe that the wider designs of the heel core of the prior art used first layers 30 of widths of 6.35 mm maximum, while the width of the first layer 30 of the heel core 20 of the invention is 7.62. the width of the rim wheel seat (i.e. "W") is 10.16 mm, the width of the first layer 30 is 75% of W. It is believed that the width of the first layer 30 of the pitch core 20 should be greater than 65% and less than 90% of the distance In other words, greater than 6.35 millimeters and smaller than 9.14 milimeters. Another important aspect of the bead core 20 is the neality of the first layer 30. By configuring the filaments 26 of the first layer 30 so that their axial axes lie in a common plane, the compression force between the first layer 30 and the wheel wheel seat 62 is more uniform than was possible in the prior art designs. The more uniform force between the first layer 30 and the wheel rim seat 62 tends to secure the heel heel 60 to the rim wheel seat 62. Another important aspect of the design of the invention is the dimensional integrity of the bead core 20. The analysis of cut cured tire sections indicates that the first ca 30 of the bead core 20 retains its linearity through the vulcanization process. The bead cores 20 of the prior art are often deformed when the frame 16 is "blown" during the process of construction and vulcanization of the lining. The first layer of filaments 26 in the bead core 20 of the invention has a inner diameter smaller than typical in previous relevant designs. An important element of dimensional stability is the fact that the inner diameter (d) of bead core layer 44 is set approximately equal to the D. diameter of the hump 80 of the associated rim wheel, in comparison with the heels of the prior art, which have an inner diameter substantially greater than the diameter of the heel hump. The inventors have found that the d (d) base layer can be in the scale of less than 0.51 millimeters greater than the diameter Dh of heel hump to 0.76 millimeters less than the diameter of the hump of the heel and the size still can be mounted on these ATV tire wheels of relatively small diameter. For example, on a nominal AT wheel of 15.40 centimeters the D. diameter of the heel hump is 25.48 centimeters and the diameter (d) of the optical taper core is 25.48 centimeters. The preferred rims 10 have the diameter (d) of bead cores equal to the diameter D. of the bead hump 80, regardless of the wheel size of the wheel. When the diameter (d) becomes much larger, it is possible to cause the bead core 20 to work its own way on the rim wheel 22. It is believed that the combination of a very large bead core and a diameter approaching the rim wheel hump 80 in its diameter D. is very important in retaining the rim on the rim wheel when deflated. The smaller diameter combined with the heel core base plus Dlia increases the rubber compression between the bead core 20 and the rim wheel seat 62 which increases the retention force, keeping the rim on the rim wheel . In practice, the first layer 30 is configured to be approximately parallel to the axis of the rotation rim and / or to the rim wheel seat 62. In the preferred tire and wheel, the tire has a "AT" center tire rim of 5 degrees according to the 1995 Tire and Rim Association Yearbook, and a rim having the first layer 30 that is inclined at the scale parallel to the rim wheel axis and parallel to the rim wheel seat 62, which in turn makes a 5 degree angle with the rotation axis of the rim. The rim 10 of the invention mounts on a typical central rim wheel 22 as any conventional rim of the prior art would. No wheels or special rim wheels are required, nor special assembly procedures in absolute. It is also believed that the innovative rim 10 described herein will be retained on the wheel 22 with almost any effective design of a flat operating device 18. Even when the planar operating devices 18 are being screened are effective and preferred, the bead design described herein must work with other planar operation devices.

Claims (9)

1. - A low pressure ATV pneumatic rim, vulcanized with a pair of axially spaced heels, when we have a layer that extends between the heels and turned radially outwards around the heels, the rim having a toroidal configuration, each of the beads having a bead core comprising a coil of rolled alamb filaments, which on the rim toroidally configured prior to vulcanization, has a polygonal cross-sectional area defined by imaginary line segments making contact with the outer surfaces of the outer filaments in the heel core, the bead core being characterized by the polygonal cross-sectional area having: one base side radially inward, the base side having a length; a radiologically 1; a first side extending between the base and a prong or side radially outward, the first side inter secting the base side at a first edge to form an included alpha angle; and a second side, the second side extending between the base side and the point or side radially towards the second side by intersecting the base side to form an included beta angle, the angle alpha being on the axially inner side of the core. heel, the alpha lo being equal to beta.

2.- The uncured pneumatic rim of the rei indication 1, also characterized by the polygon cross section of bead core having a perimeter, the perimeter being defined by line segments tangent to a more external point of c of one of the filaments forming the heel core, the perimeter defining the cross-section of the bead core, the cross-sectional area of the bead core being smaller than the area of a rectangle or square having alpha and beta angles that are cluded which are same.

3. The uncured pneumatic tire of the rei indication 1, further characterized by the bead core which also has first, second, third and fourth layers of filament in the bead core.

4. The uncured pneumatic tire of claim 1, further characterized by the length of the base side of the bead core that is greater than 6.35 mm. and less than 9.14 mm

5. - The uncured pneumatic tire of claim 1, further characterized by each of the filaments in the bead core having a diameter between 0.08 mm and 0.97 mm.

6. The uncured pneumatic tire of claim 1, further characterized by the bead core having in addition a first layer of filaments, the first layer having a width, the width of the first layer being greater than 6.35 mm and less than 9.14 mm.

7.- The bead core for use in a pneumatic rim, the bead core is characterized by: a continuous filament, the filament being arched rhytically in an annular shape towards the bead core, the bead core having a first layer of The first layer being radially innermost, the first layer having a width between greater than 6.35 mm and smaller than 9.14 mm.

8.- In combination, a pneumatic rim of low pressure ATV layers and a rim wheel, the rim characterized by: a pair of axially spaced bead cores; a frame having at least one layer, the layer having a central portion and later edge portions, each side edge portion being bent axially and radially outwardly around one of the bead cores; and, a heel heel surface, the heel taper surface being radially inward of one of the bead cores and in interface with an associated rim wheel, the bead heel surface having a length: and the rim wheel characterized by: a hump and a rim wheel flange, the rim wheel flange having a surface axially inward, the distance between the hump and the surface axially inwardly of the rim wheel being the seat heel, the length of the heel heel surface being between 80% and 125% of the height of the heel seat.

9. The radial layer pneumatic tire of the claim falls ion 8, wherein each of the bead cores is characterized by wire strands positioned relative to one another to form a base side, a radially outermost side and first and second sides extending between the base and the radially outermost side, the base l being substantially linear, the width of the base side of the bead cores being between greater than 6.35 mm and less than 9.14 mm.