FR2610872A1 - VEHICLE WHEEL WITH OPERATING SAFETY CHARACTERISTICS IN THE EVENT OF AN AVIATION - Google Patents

Abstract

IN THIS WHEEL WHICH INCLUDES A RIM 2 EQUIPPED WITH RIMS 3, SLIGHTLY TAPERED SEATS 5 FOR THE TIRE, AT LEAST ONE ELEMENT 6 PREVENTS THE SLIDING OF THE BALL AND A RIM PITCH 7, AND A TIRE 10 WITH D 'A CARCASE 11, OF 12 HEELS CONTAINING 13 RODS AND SIDE WALLS AS WELL AS A 17 TREAD INCLUDING A BELT 18, A DIAMETER D OF THE RIM IS ABOUT 10 GREATER THAN THE STANDARD DIAMETER OF A RIM, EACH RIM EDGE 3 HAS A WIDTH APPROXIMATELY HALF OF THE STANDARD RIM OPENING A, THE HEIGHT RATIO HA THE WIDTH B OF THE TIRE IS LESS THAN 0.6 AND THE SIDE WALL ELEMENT 14 NEAR THE EAST HEEL PARALLEL TO THE WIDE EDGE OF THE RIM AND BEARING ON THE LATTER. APPLICATION ESPECIALLY TO TIRES WITH GOOD BEHAVIOR IN THE EVENT OF DAMAGE, WITHOUT COMPLICATION OF MANUFACTURING OR ASSEMBLY AND ESSENTIAL WITH RESPECT OF STANDARD DIMENSIONS.

Description

The invention relates to a vehicle wheel comprising

  a tire and constituted by a monobloc rim com-

  bearing flanges, which are axially distant and which

  that edge is widened in the axial direction, seats for the rim made with a slightly conical shape, at least

  an element preventing a skid of the heel, and a hollow of January

  te, and by a tire fitted with a carcass, in particular a

  radial carcass, and axially distant heels,

  each having a tensile-resistant annular bead and having a lower side wall element, folded axially outwards, and side walls as well as

  a profiled tread reinforced by a belt

  re, which has substantially the width of the roughness surface

  the sidewall element near the heel extends

  parallel or almost parallel to the rotation axis

  tion. Standard vehicle wheels consist of

  by a standard hollow base rim and a standard tire.

  known type for example according to the ETRTO regulations or the WdK directive. The rim is determined by its diameter and its opening. The rim flange and the seat of the tire have a determined size, but can be chosen. For this purpose the tire of the vehicle is made so that its two heels are adapted according to the arrangement and the arrangement of the carcass. The beads of the tire, each equipped with a bead resistant to the

  traction, guarantee a stable and reliable seat on the

  you. In the case of low leakage of compressed air, an element

  locking mechanism on the rim ensures that the tire heel

  tick does not deviate from its support zone. In the case of a large air leak, this is not guaranteed. It is then necessary

  replace the vehicle wheel with a spare wheel.

  In the case of the vehicle wheel known from DE-A-33 389 71, in order to guarantee a

  in the event of damage and to obtain the characteristics

  the rims and tires are arranged in such a way that the rim provides support in damaged conditions and the tire

  wall element extending flat outwards. The car-

  breakage has no inflection point and connects to the heel without any transition of curvature. In place of a

  hollow base rim having a support zone in case of

  varies, we can also provide a rim with a seat

  oblique for the tire, in which case the tire bead

  that has a rod installed eccentrically.

  The known wheel rim has

  in the form of an axially extended edge. The width

  the rim becomes equal to the width of the

  rolling face. The operating characteristic in

  case of emergency is therefore guaranteed, but it is not ex-

  securely closes the folded side wall of the tire.

  that flat comes into contact with the ground and undergoes

dommagements.

  In another vehicle wheel known from DE-

  A-29 37 272, a rim in several elements is made under

  the shape of a rim substantially surrounding the heel of the Dneu-

  and with a groove, the upper rim flanges

  lower and lower, axially extended, forming a passage in the manner of an open jaw for the side wall

  flat, arranged axially, of the tire.

  The width of the rim is equal to the width of the running surface of the tire. As a result, it is not

  not reliably excluded that the side wall, folded laterally

  flat tires come into contact with the

soil and suffer damage.

  In another vehicle wheel known from DE-

  A-24 32 927, the wheel rim has a bearing area in the event of damage and the rim flanges are made in the form of flat edges extended axially. The specifications

  are not given for the realization in the form of

2 6 1 0872

  me a monobloc rim. The wheel of the vehicle can not be mounted without the presence of the rim. This is obtained

  when the rim is made of several elements. Lemon-

  The tire is then relatively complex and time consuming. The width of the rim is equal to the width of the running surface. In rolling conditions

  the pneumatic is supported in its middle part.

  In another vehicle wheel known from US Pat. No. 3,930,527, the wheel rim is formed as a flat base and the rim flanges are flat edges widened in the axial direction. The rim may be equipped with a support element used in case of damage. The width of the rim is equal to the width of the belt of a vehicle tire having substantially standard dimensions. Under operating conditions in the event of damage, the lateral wall, folded laterally, comes into contact with

soil and is damaged.

  Operating supports in case of damage, installs

  rims for vehicle wheels, are

  but have the disadvantage that the

  Rim recess is either narrowed or completely filled.

  As a result, the rim recess is no longer a

  cilitating the assembly. Operating support in case

  damage also increases the moving mass.

  In another vehicle wheel known according to DE-

  A-3 000 428, the wheel rim comprises seats for the tire, which extend radially inwards,

  and in the corresponding vehicle wheel correspondingly

  the heels of the tire are fixed on the seats pre-

  seen for the tire, being folded radially inwards. Such a vehicle wheel having a

  pneumatic tire, whose heels extend radially towards the

  interior, has a relatively

  carrying and suitable for operation in the event of damage.

  The wheel can be perfectly mounted according to a method

  determined. The width of the rim is less than the width

tire belt.

  The manufacture of such a tire is relative-

  less advantageous since the tire heels

  tick are made by being folded radially inward. As well the known standard vehicle wheel

  the known safety wheel are likely to improve

additional information.

  The object of the invention is to provide a wheel of

  hull, whose rim has a hollow base and whose

  rim edges include wide edges, without the presence of a central support used in case of damage, and to fix the

  pneumatically externally from the radial point of view on the

  te, in a standard way, and develop it so as to obtain operating safety characteristics in the event of damage and improvements in general behavior

  driving resistance and rolling resistance.

  The technical problem underlying the invention

  is to realize the vehicle wheel described above from

  that the width of the rim is equal to or greater than

  the width of the tire belt, that the trans-

  of the tire is comparable to that of a pneumatic tire

  only with low section, that one can obtain a length of mem-

  shortened brane appropriate and appropriate narrow form

  for the flexible side wall of the tire and that the

  lon be reinforced by the lower side wall element.

  This problem is solved according to the invention

  thanks to the fact that the diameter of the rim is higher than

  10% of the diameter of the standard rims, that each

  rim edge is realized in the form of a marginal rim

  wide with a width approximately equal to the

  of the standard rim opening, and that the H / B ratio characterizing the cross section of the tire is less than 0.6,

  and the sidewall element near the heel extends parallel to

  same at the wide edge of the rim flange and is arranged so as to rest on this wide edge of the rim flange, H / B denoting the ratio of the height H to the width B of

  the cross section of the tire.

  Thanks to the proposed embodiment and arrangement of the rim and the tire according to the invention, a

  the width of the rim is important, being preferably

  superior to the width of the tire belt,

  and on the other hand the heel areas and the side wall

  heels are made in such a way as to be relatively

  rigid and rigidly supported in a reliable manner.

  The free membrane length of the flexible sidewall

  is advantageously bent under load.

  The width of such a loaded tire is equal to or slightly less than the width of the tire in the state

not loaded.

  We obtain a relatively rigid wheel system,

  equipped with a tire and including on the one hand a rim and

  on the other hand, a belt with a tread

  parts of the wheel, to be considered as rigid, being located in positions relatively close to each other. The flexible membrane of the folded portion of the side wall remains narrow and freedom of movement is limited to some extent. The folded side

  is directed radially inwards. Overall we ob-

  holds advantages in relation to low resistance to

  turnover and in relation to the general behavior of

  pick. This is valid both in the case of a

  in a straight line than in the case of

  and leads to improved ground adhesion.

  Moreover, we obtain operating conditions

  reliably in the event of damage without the need for a central support used in case of damage The bearing surface is formed by the wide edges of the rim flanges, which are present on both sides. These edges are generally made with a cylindrical shape; it means that they

  extend parallel to the axis of rotation.

  In accordance with another feature of the invention

  However, each rim flange can be made to have a slightly conical shape, being inclined

  born especially about 1 -3 relative to the axis of rotation.

  The sidewall of the tire near the heel then has

  also a slightly conical shape corresponding.

  In addition, the side wall element close to the

  There may be on the face facing the rim, a particular band of heel friction, which is made of hard rubber. This provides friction conditions

  appropriate. The depth of the rim recess may be greater than

  approximately 1.5 factor, at the standard depth

sting.

  The vehicle wheel according to the invention has, due to the presence of seats provided on the rim for

  the tire and having a larger diameter, an opening

  increased rim size compared to the standard wheel and

  may be used in the case of brakes with

  important. The new vehicle wheel has a width comparable to a vehicle wheel, in which the beads of the tire are radially fixed on the inside of the rim, and has a comparable characteristic of

  lift in case of damage. The vehicle wheel conforms to the

  However, it can be manufactured in a relatively

  It is simple because it is made, molded and vulcanized according to standard methods. In addition, it has an advantage from an assembly point of view since

the rim has a hollow base.

  The side wall element, which is close to the

  lon and is substantially parallel to the axis of rotation, is molded and vulcanized according to standard methods. The vehicle wheel according to the invention is, from the point of view of its

  in the loaded state, comparable to a wheel with

  tire with a low cross-section, the ratio of which

  wearing the height at the width H / B is equal to about 0.5.

  However it is more stable since the width of

  the rim is large and preferably greater than the

geur of the belt.

  Other features and advantages of the pre-

  This invention will be apparent from the description given below,

  relating to a nonlimiting example of implementation, and taken in reference to the accompanying drawings, in which: - Figure 1 shows a section of a wheel of

  vehicle according to the invention, consisting of a single rim

  noblock and a tire - Figure la shows a detail of the tire bead; - Figure 2 schematically represents three

  different but comparable pneumatic tires, corresponding

  respectively to a standard wheel, a safety wheel and a wheel according to the invention; - Figure 3 shows different drawings a) a standard wheel, b) a safety wheel and c) a wheel according to the invention;

  FIG. 4 represents a standard wheel according to

  in the state of the art, in three states of

  is lying; - Figure 5 shows another wheel according to the state of the art, in three operating states;

  FIG. 6 represents a vehicle wheel

  of a tire, according to the invention, in the gon-

unloaded;

  FIG. 7 shows a vehicle wheel con-

  form in Figure 6, in the loaded state; and

  FIG. 8 represents a wheel according to the

  6.7, in case of malfunctioning.

  The vehicle wheel of Figure 1 is constituted

  by a monobloc rim 2 and a tire 10. The rim pos-

  two broad, flat and axial flanges 3, ie what are called wide rim flanges. These can be parallel to the axis of rotation or be slightly inclined relative to the latter. The seat for the tire is

  denoted by 5 and is slightly inclined in a standard manner.

  The hollow of rim 7 is connected to the seat of the tire,

  inward in the central area. Between this trough in January

  the seat and the seat of the tire is disposed an element

  6 preventing a skid of the heel and presenting itself in the form of

  me of a nose-shaped elevation (called Hump). The edges

  wide rim 3 are rounded axially outward.

  This part of the rim is designated by 4. The spokes are designated respectively by 8 and 9 on the inner side and

  the outer side. The rim opening A is a standard value

  sting. The width a of each rim wide flange is equal

at A / 2.

  The rim width is 2 x A. The

  diameter D of the rim is 7% to 15% greater than the diameter

  be of a standard type rim. The depth t of the hollow

  rim may be equal to a standard dimension or be

  and take a value up to t x 1.5.

  The tire 10 is constituted by a carcass 11 and comprises

  heels 12 spaced axially and each having an annular rod 13 resistant to traction. The annular rod is arranged inside and in the center of the heel

  of the tire. The heel is arranged substantially

  uard, but connects, at its outer end

  from the radial point of view, to a side wall element 14 pro-

  heel, substantially axial and flat and

  parallel to the axis of rotation (not shown). This side wall element is adapted to the wide rim flange 3. If the latter is slightly inclined, the side wall element 4 is also inclined correspondingly. The height of the section of the tire is designated H. The carcass 11 extends with a curved shape from the element

  side wall 14 to the edge of the waist.

  The side wall is designated 16. The tread 17 is reinforced by belt-shaped insert means 18, consisting in particular of two superposed layers of cords.

  in steel. In this zone 15, the carcass is substantially

  curved blenment below the inserted mncyens 18. The inserted means 18

  possesses a width equal to the width L of the surface

  this rolling. Figure la represents, as a detail,

  a band 19 of friction of the rod, located in the ta-

  12. FIG. 2 schematically shows, in the left part of the section of the tire, the contours of a standard rim 20 and a standard tire 21, namely by way of example a rim 4 B 14 and a tire. 145 R 14. The rim opening A is equal to 102 mm and the diameter

D of the rim is equal to 355 mm.

  The left side of the section of the tire represents

  the contours of a CTS 22 rim and

  CTS 23, for which we have chosen as an example

  a CTS 185 / 45R425 Dneumatic having a diameter D

  425 mm rim and a 120 mm rim opening A.

  The width of the belt G of the tire is 160 mm. The

  pneumatic has an outside diameter P equal to 590 mm.

  In the right part of the tire section,

  that the contours of a rim 24 and a tire

  in accordance with the invention. The diameter D of the rim is here equal to 395 mm and the rim opening is equal to

standard way, at 102 mm.

  The base of the rim recess is located approximately

  at the height of the seat of a standard tire.

  The broad rim edge has, which is axially expanded, has

  a width equal to about 58-60 mm.

  The overall dimension of each rim flange is approximately 10 mm larger, counted axially, due to the presence of the bent portion 4. The outside diameter P of the tire is equal to 590 mm. The dimensions of such a tire according to the invention are designated by 195/50 R 395, 195 designating the width of the tire, the ratio H / B and R 395 of the radial tires used with a rim with a diameter of 395 mm. . We see here that the

  width of the rim is greater than the width of the

ture.

  Figure 3 schematically represents the differences

  between the different wheel systems, ie the standard radial tire a), the CTS tire with

  heels fixed radially inwards b) and the pneumatic

that according to the invention c).

  The system a) corresponds to a standard rim and a standard radial tire. The width of the rim, which should be considered rigid, is designated by w2 and the width of the metal belt, which must be considered

  as rigid, is designated w1. In this system w is sen-

  equal to w2 since the width of the belt

  re is substantially equal to 0.7 times the width of the section

  cross section of the tire. The flexible parts of the

  side king of the tire are formed respectively by

  the parts of the carcass and the side wall. Such a tire

  is not suitable for operation in the event of

  varied. In the case of system b), it is a CTS rim and a CTS tire. The width of the rim W2, which must be considered as rigid, is at least 0.75 times the width of the belt w1. The flexible parts of the

  carcass and the side wall are deformed with a

  belly, since the heels of the tire are

  radially inward on the rim. Such a system

  wheel is not suitable for operation in the event of a-

  varied. The side wall can be deformed in a more

  favorable that a tire side wall of standard type

  sting. However the CTS tire is of less advantageous manufacture.

  With regard to system c), we are

  this of a rim and a tire according to the invention.

* The width of the rim W2, which must be considered as

  gide, is at least equal, but in general is greater than the

  w1 width of the belt to be considered rigid.

  The flexible side walls are shortened compared to those of systems a) and b). The flexible sidewall element is influenced by its connection to the relatively rigid and supported side wall element near the bead and, under load, takes a domed radially inward shape.

  The rim and the tire do not differ strongly

  of the standard embodiment. Because of the pre-

  If the rim recess is present, the tire can easily be put in place. Molding and vulcanization of the tire is carried out in known molds formed of two elements

or segmented.

  The wheel is able to function in case of damage.

  The rubber elements of the inner sidewall rely essentially on the parts of the elements of the

  side walls close to the heels. The sidewall element

  ral, which relies on the wide rim flange can, in the

  where necessary, be equipped with reduced means of

  friction. The width of the cross section of the

  pneumatic device according to the invention in the loaded state is sen-

  equal to the width of the cross section of the unfilled tire. As a result, since the wide areas, to be considered rigid, of the tire rim and belt are arranged so as to be relatively close to one another, the system c) is more stable than the system a) or b) and therefore the rolling resistance is more favorable and the behavior

  of driving is improved compared to the wheels of

known hicles.

  Figure 4 shows the vehicle wheel 20,21

  equipped with a tire, according to Figure 2, which corresponds to

  to a standard type, in the inflated and unloaded state, in

  load and during operation in case of damage.

  The width of the cross-section in the gon-

  , unloaded and in the loaded state 21 'is substantially the

  even. During operation in case of damage, the wall la-

  lateral 21 "swells laterally and is in contact, by its

  outside flank, with the ground and undergoes damage.

  Figure 5 shows the vehicle wheel 22,23

  equipped with a tire, according to Figure 2, which corresponds to

  CTS system, in the loaded and unloaded state, under load

  and during operation in case of damage. The width in

  transverse pe for the inflated state, not loaded and loaded 23 '

  is substantially the same. When operating in case of

  varies, the side wall 23 "extends outwards, but does not touch the ground.The inner surface is supported on

  the outer face of the seat of the tire.

  Figures 6, 7 and 8 show the vehicle wheel

  24,25 equipped with a tire according to FIG.

  which corresponds to the embodiment according to the invention

  tion. The cross-sectional width of the tire 25 '

  and loaded (see FIG. 7) is slightly less than the cross-sectional width of the inflated and non-inflated tire.

loaded (see Figure 6).

  The total width of the belt is relatively

  gide is less than the width of the rim with

  ges. On the other hand, the lateral wall element close to the heel is relatively rigid since it is substantially parallel to the axis of rotation and bears on the rim.

  broad ledges. It can therefore be considered that this element

  lateral wall is part of the relatively

rigid of the wheel.

  Since the rigid parts of the belt on the one hand and the rim on the other hand are arranged relatively close to each other, the flexible portion of each side wall is relatively short. In addition

  the flexible part is influenced by its connection to the

  lateral wall close to the heel. When applying a load, this flexible part bulges laterally

  with a tendency to deform radially inwards.

  From a global point of view, it is these differences in the new

  vehicle wheel which confer advantages

  reducing the rolling resistance and improving the overall stability of the wheel fitted with the tire.

  matic. When operating in the event of damage, see

  8, the flexible side wall element 25 "takes on an even more bulging shape radially inwards and thus does not come into contact with the ground, the inner surface of the tire is then supported by the side wall elements close to the As a result, the vehicle wheel is also suitable for operation in the event of damage,

  without central support for such a case of damage.

Claims (4)

  1. Vehicle wheel comprising a tire and constituted by a monobloc rim (2) comprising flanges   (3), which are axially distant and whose tail is   gi in the axial direction, seats (5) for the rim   made with a slightly conical shape, at least one element   (6) preventing slippage of the heel, and a rim recess   (7), and by a tire (10) provided with a carcass (11),   including a radial carcass, and distant heels (12)   axially, each comprising an annular rod (13)   tensile strength and having a wall element la-   lower side (14), folded axially towards the outside,   and sidewalls as well as a tread   spun yarn (17) reinforced by a belt (18), which   the width of the running surface, the side wall element near the heel extending parallel or almost parallel to the axis of rotation, characterized in that the diameter (D) of the rim is approximately to the standard rim diameter, that each rim of   rim (3) is realized in the form of a marginal marginal rim.   ge (a) having a width approximately equal to   warmth the standard rim opening (A), and that the H / B ratio   characterizing the cross section of the tire is infe-   less than 0.6, and the side wall element (14) close to   it extends parallel to the wide edge of the rim flange and is arranged so as to bear on this wide edge of the rim flange, H / B denoting the ratio of the height   H to the width B of the cross section of the tire.   2. Vehicle wheel comprising a pneumatic tire   1, characterized in that the flange of   rim (3) has a slightly conical shape, being   for example 1-3 with respect to the axis of rotation,   and that the sidewall member (14) near the heel pos-   sede a slightly conical shape corresponding.   3. Vehicle wheel having a tire 2 6 10872   according to one of claims 1 and 2, characterized in that   the side wall element (14) close to the heel has a   band (19) for rubbing the heel, made of hard rubber.   4. Vehicle wheel having a tire   according to one of claims 1 to 3,   characterized in that the depth (a) of the trough (7) of the rim (2) is greater by a factor of approximately 1.5,   at the depth of a standard rim recess.