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DE-102024210803-A1 - Rim and wheel arrangement for a light vehicle

DE102024210803A1DE 102024210803 A1DE102024210803 A1DE 102024210803A1DE-102024210803-A1

Abstract

The invention relates to a rim (2) comprising at least: - a radially inner rim wall (10) with a radially inner valve opening (10a); - a radially outer rim wall (11) with a radially outer valve opening (11e) and a recess (20) forming a rim well of the rim (2), wherein a valve passage (21) extends between the radially outer valve opening (11e) and the radially inner valve opening (10a), the passage having a radially outer area (21b) for receiving a valve base (5); and - Rim shoulders (12, 13) which connect the radially inner rim wall (10) with the radially outer rim wall (11) and which transition into radially outwardly projecting rim flanks (14, 15) for anchoring a tubeless tire (3). According to the invention, the radially outer valve opening (11e) and the radially outer region (21b) are designed to have a wider cross-section than the radially inner valve opening (10a) and/or a radially inner region (21a) of the valve passage (21), and the radially outer area (21b) is designed such that the valve foot (5) of a valve received in the valve passage (21) does not project outwards in a radial direction (rR) beyond the base of the trough (20a) into the trough (20).

Inventors

  • Florian Sudikatis

Assignees

  • CONTINENTAL REIFEN DEUTSCHLAND GMBH

Dates

Publication Date
20260513
Application Date
20241111

Claims (15)

  1. Rim (2), for a wheel arrangement (1), in particular for a light vehicle, preferably a bicycle, comprising at least: - a radially inner rim wall (10) with a radially inner valve opening (10a); - a radially outer rim wall (11) with a radially outer valve opening (11e), wherein a recess (20) with a recess base (20a) extending completely around the rim (2) is arranged centrally in the radially outer rim wall (11), projecting inwards in a radial direction (rR) and forming a rim well of the rim (2), wherein a valve passage (21) for receiving a valve (4) having a valve base (5) and a valve stem (6) extends between the radially outer valve opening (11e) and the radially inner valve opening (10a), wherein the valve passage (21) has a radially outer area (21b) for receiving the valve base (5), wherein the radially outer area (21b) extends inwards in a radial direction (rR) from the radially outer valve opening (11e) in the recess base (20a) of the recess (20); and - two rim shoulders (12, 13) which connect the radially inner rim wall (10) axially to the radially outer rim wall (11) and which extend from the radially outer rim wall (11) into radially outwardly projecting, preferably vertically projecting, rim flanks (14, 15) for anchoring a tubeless tire (3), characterized in that the radially outer valve opening (11e) and the radially outer region (21b) of the valve passage (21) are wider in cross-section than the radially inner valve opening (10a) and/or a radially inner region (21a) of the valve passage (21) extending outward from the radially inner valve opening (10a) in the radial direction (rR), and the radially outer region (21b) of the valve passage (21) is designed such that the valve base (5) of a tire received in the valve passage (21) The valve (4) does not extend radially (rR) outwards beyond the base of the trough (20a) into the trough (20).
  2. Rim (2) after Claim 1 , characterized in that the radially outer region (21b) of the valve passage (21) is enclosed by a second passage wall (22b) which extends inwards in a radial direction (rR) starting from the base surface (20a) of the trough (20), wherein an axial width (B21b) of the radially outer region (21b) is between 7mm and 13mm, preferably between 8.3mm and 12mm.
  3. Rim (2) after Claim 2 , characterized in that the second passage wall (22b) has a bottom surface (24) bounding the radially outer region (21b) radially inwards and/or a side wall (25) extending inwards in the radial direction (rR) from the trough base surface (20a) and enclosing the radially outer region (21b), wherein the side wall (25) - extends at least partially parallel to the radial direction (rR), so that at least partially a substantially hollow cylindrical or a substantially cuboid radially outer region (21b) is formed, or - extends at least partially at an angle to the radial direction (rR), in particular narrowing radially inwards, so that at least partially a substantially frustoconical radially outer region (21b) is formed, or - extends at least partially curved in the radial direction (rR), in particular concavely curved, so that at least partially forms a substantially semi-cylindrical or pot-shaped radial outer region (21b).
  4. Rim (2) after Claim 3 , characterized in that the bottom surface (24) and/or the side wall (25) of the second passage wall (22b) forms a support (23) for the valve foot (5) of a valve (4) received in the valve passage (21).
  5. Rim (2) after Claim 3 or 4 , characterized in that the radially inner region (21a) of the valve passage (21) is enclosed by a first passage wall (22a) which extends outwards in a radial direction (rR) from the radially inner rim wall (10), in particular coaxial to the radially inner valve opening (10a), preferably hollow cylindrical and forming an opening diameter (D21a) of the radially inner region (21a) of, for example, between 6.2 mm and 8.3 mm, for supporting a valve stem (6) received in the valve passage (21), wherein the second passage wall (22b) is preferably connected to the first passage wall (22a).
  6. Rim (2) according to one of the preceding claims, characterized in that projections (11a, 11b) are arranged on the radially outer rim wall (11) in the axial direction (rA) on both sides of the recess (20) completely circumferential around the rim (2) and bead seats (11c, 11d) for receiving tire beads (18, 19) of the tubeless tire (3) are arranged between the rim flanks (14, 15) and the respective projection (11a, 11b).
  7. Rim (2) according to one of the preceding claims, characterized in that the inner rim width (B2) between the rim flanks (14, 15) is between 15 mm and 132 mm, and/or the recess (20), in particular depending on the inner rim width (B2), it has a drop-bed width (B20) of between 7mm and 124mm, in particular between 9mm and 124mm.
  8. Wheel arrangement (1), in particular for a light vehicle, preferably for a bicycle, with a rim (2), in particular a rim (2) according to one of the preceding claims, a tubeless tire (3) with tire beads (18, 19) and a valve (4) with a valve base (5) and a valve stem (6), wherein the rim (2) has at least: - a radially inner rim wall (10) with a radially inner valve opening (10a); - a radially outer rim wall (11) with a radially outer valve opening (11e), wherein a recess (20) is arranged centrally in the radially outer rim wall (11) completely surrounding the rim (2) with a recess base (20a) which projects inwards in a radial direction (rR) and forms a rim well of the rim (2), wherein a valve passage (21) runs between the radially outer valve opening (11e) and the radially inner valve opening (10a) in which the valve (4) is received, wherein the valve passage (21) has a radially outer area (21b) which extends inwards in a radial direction (rR) from the radially outer valve opening (11e) in the recess base (20a) of the recess (20) and in which the valve base (5) of the valve (4) is received; and - two rim shoulders (12, 13) which each connect the radially inner rim wall (10) axially to the radially outer rim wall (11) and which extend from the radially outer rim wall (11) into radially outwardly projecting, preferably vertically projecting, rim flanks (14, 15) on which the tubeless tire (3) is anchored via its tire beads (18, 19), characterized in that the valve base (5) of the valve (4) has a wider cross-section than the valve stem (6) of the valve (4), and the radially outer valve opening (11e) and the radially outer region (21b) of the valve passage (21) have a wider cross-section than the radially inner valve opening (10a) and/or a radially inner region (21a) of the valve passage extending outward from the radially inner valve opening (10a) in a radial direction (rR). (21), on which the valve stem (6) of the valve (4) is supported, and the valve foot (5) of the valve (4) received in the radially outer area (21b) of the valve passage (21) does not project in a radial direction (rR) outwards beyond the trough base (20a) into the trough (20).
  9. Wheel arrangement (1) according Claim 8 , characterized in that the valve (4) has at least in some areas a cuboid or cylindrical or frustoconical valve base (5) and a cylindrical valve stem (6).
  10. Wheel arrangement (1) according Claim 8 or 9 , characterized in that the radially inner region (21a) of the valve passage (21) has essentially the inverse shape of the valve stem (6) and/or the radially outer region (21b) of the valve passage (21) has essentially the inverse shape of the valve base (5).
  11. Wheel arrangement (1) according to one of the Claims 8 until 10 , characterized in that the radially outer region (21b) of the valve passage (21) is enclosed by a second passage wall (22b) which extends inwards in a radial direction (rR) from the base surface (20a) of the trough (20) and at least partially surrounds the valve foot (5) of the valve (4), wherein the second passage wall (22b) has a bottom surface (24) which limits the radially outer region (21b) radially inwards and/or a side wall (25) which extends inwards in a radial direction (rR) from the base surface (20a) and encloses the radially outer region (21b).
  12. Wheel arrangement (1) according Claim 11 , characterized in that the bottom surface (24) and/or the side wall (25) of the second passage wall (22b) forms a support (23) for the valve foot (5) of the valve (4) received in the valve passage (21), so that movement of the valve (4) in a radial direction (rR) inwards is prevented.
  13. Wheel arrangement (1) according Claim 11 or 12 , characterized in that the side wall (25) - at least partially runs parallel to the radial direction (rR), so that at least partially a substantially hollow cylindrical or a substantially cuboid radial outer region (21b) is formed, or - at least partially runs at an angle to the radial direction (rR), in particular narrowing radially inwards, so that at least partially a substantially frustoconical radial outer region (21b) is formed, or - at least partially runs curved in the radial direction (rR), in particular concavely curved, so that at least partially a substantially semi-cylindrical or pot-shaped radial outer region (21b) is formed.
  14. Wheel arrangement (1) according to one of the Claims 8 until 13 , characterized in that the valve foot (5a) is radially flush with the base surface (20a) of the trough (20) on its upper side or lies radially below it.
  15. Wheel arrangement (1) according to one of the Claims 8 until 14 , characterized in that the rim (2) is designed as a tubeless straight-side rim or as a tubeless crotchet rim, which has rim flanges (16, 17) extending axially inwards on the rim flanks (14, 15).

Description

The invention relates to a rim and a wheel arrangement with such a rim for a light vehicle, in particular for a bicycle. Conventional rims for light vehicles, especially bicycles, are generally designed as double-wall rims. The tire's beads are held in place by rim flanges (with or without hooks), which are pulled against the rim flanges when the tire is inflated. In a tubeless setup, a sealing interface is created between the rim bed and the tire, allowing air to be retained inside the tire. Tubeless-ready (TLR) tires require sealant to further seal the casing, while tubeless (TL) tires can be sealed without sealant. Air is admitted through a valve, which is mounted in a valve hole in the rim bed. Standard valves are usually Presta (Sclaverand) valves, although Schrader or Dunlop valves can also be used. The valve is conventionally inserted radially from the outside through the valve hole using a valve stem. This creates a valve base, wider than the valve hole, which rests against the rim bed from the outside and prevents further insertion. The valve base can have different shapes, such as a cuboid or a truncated cone. A nut is then screwed onto the valve stem from the inside out, clamping the rim between the nut and the valve base and thus holding the valve firmly in place. Sealant, whether from the valve or from another source, can then spread along the inside of the tire, as is typical with TLR tires, sealing the carcass. A disadvantage of this design is that the wide and tall valve base, which rests radially on the outside of the rim bed when mounted and protrudes towards the tire, protrudes from the rim bed. Rims, especially those designed for tubeless setups according to ISO 5775-2 and ETRTO SM Rims (European Tyre and Rim Technical Organisation - Standard Manual section "Rims" - from 2024), typically feature a recessed rim well in the form of a circumferential groove to facilitate the mounting of tubeless TLR or TL tires. The valve base protrudes from this recessed rim well. This makes mounting the tubeless TLR or TL tire particularly difficult, as it is normally inserted into the rim well with its tire beads positioned so that the two beads are in contact and also rest against the rim bed. In the area of the valve, the tire beads must then be pushed over the rim flanges into the rim well. Air is then admitted through the valve, flowing between the two tire beads located in the rim well into the tire's interior volume, thus inflating the tire. As the pressure inside the tire increases, the tire beads are pulled against the rim flanges (with or without hooks) over protrusions (tire humps) on the rim well. However, because the valve stem protrudes from the rim well, the two tire beads cannot reliably align themselves in the valve area and therefore cannot make full contact with the rim well. This allows air to escape around the valve, making the inflation process more difficult, at least initially. To counter this, in US 6443533 B2 or DE 69805369 T2 and also US 6588474 B2 The design involves screwing or fitting a specially manufactured valve with a valve head narrower than the valve opening, or with a ring-shaped, flared, flat valve head, into the hollow-chamber rim. The valve head and the valve passage in the rim are designed in the area of the rim well so that the valve head is approximately flush with the rim well and the valve does not protrude from the valve opening, or only very slightly. This essentially flush design allows the two tire beads to seat against each other and against the rim well, which facilitates inflation. A disadvantage is the use of a specially manufactured valve, which is inserted into the valve opening accordingly. Standardized valves for tubeless wheel setups with wide and high valve stems are therefore unusable, making this solution very complex. The following invention is therefore based on the objective of providing a rim and a wheel arrangement with which simple, universal and reliable mounting of a tubeless tire can be ensured. This problem is solved by a rim and a wheel arrangement according to the independent claims. The dependent claims specify preferred embodiments. Accordingly, a rim, in particular a hollow chamber rim, is for a wheel arrangement, in particular designed for a light vehicle, preferably a bicycle, which has at least the following features: - a radially inner rim wall with a radially inner valve opening; - a radially outer rim wall with a radially outer valve opening that is coaxial with the radially inner valve opening, wherein a recess completely circumferential to the rim with a recess base surface projecting radially inwards and forming a rim well of the rim is arranged centrally or at the rim zenith in the radially outer rim wall, wherein a valve passage for receiving a valve having a valve base and a valve stem runs between the radially outer valve opening and the radially inner valve opening, wherein the valve passage has a radially outer area