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EP-4540069-B1 - A HUB FOR WHEELS OF BICYCLES WITH DISC BRAKES, AND WHEEL THEREWITH

EP4540069B1EP 4540069 B1EP4540069 B1EP 4540069B1EP-4540069-B1

Inventors

  • GEHRING, Hendrik

Dates

Publication Date
20260506
Application Date
20230614

Claims (14)

  1. A hub for wheels of bicycles with disc brakes, having a hub shell (11) with a first spoke flange (13), with a second spoke flange (14) and with a through hole (12) in the hub shell for a wheel bearing axle, wherein the first spoke flange and the second spoke flange are respectively provided with a plurality of spoke retaining holes (15; 16) arranged on a pitch circle around a wheel axle and wherein the second spoke flange is provided with a fastening device for a brake disc comprising screw holes, wherein the second spoke flange (14) has a larger diameter than the first spoke flange (13) and the spoke retaining holes (16) on the second spoke flange are arranged on an outer pitch circle (20) with a larger radius around the wheel axis than the spoke retaining holes (15) on the first spoke flange, and wherein the screw holes (17) on the second spoke flange (14) are arranged offset relative to the spoke retaining holes (16) on the second spoke flange (14) on a bolt circle (19), characterized in that the second spoke flange (14) has a base projection (21) for each screw hole (17), wherein the screw holes (17) are respectively arranged in end sections (22) of the base projections (21) and are axially and radially offset from the spoke retaining holes (16)..
  2. The hub according to claim 1, characterized in that the screw holes (17) are arranged on a bolt circle (19) whose diameter is at least 75 mm
  3. The hub according to claim 2, characterized in that the bolt circle has a diameter which is larger than 90 mm, more preferably larger than 110 mm and particularly preferably 120 mm.
  4. The hub according to any of claims 1 to 3, characterized in that the second spoke flange (14) has eight screw holes (16)
  5. The hub according to any of claims 1 to 4, characterized in that the second spoke flange has twice as many spoke retaining holes (16) as screw holes (17).
  6. The hub according to any of claims 1 to 5, characterized in that each base projection (21) has a base with an axially extending recess (26) and is respectively positioned in the region of one of the recesses of one of the spoke retaining holes (16).
  7. The hub according to any of claims 1 to 6, characterized in that the second spoke flange is provided with pocket depressions or breakthroughs (24) in a flange face (23) between the through hole (11) and the spoke retaining holes (16), wherein the pocket depressions or the breakthroughs (24) are preferably arranged rotationally symmetric to the wheel axle.
  8. The hub according to claim 6 and 7, characterized in that a recess (26) and a breakthrough (24) are respectively arranged symmetrically to a radial line, wherein a screw hole (17) and a spoke retaining hole (16) are arranged symmetrically to this radial line, and are preferably arranged on the radial line with their hole centre.
  9. The hub according to one of claims 1 to 8, characterized in that the base projection (21) is an integral part of the second spoke flange (14), wherein the second spoke flange and/or the hub sleeve consist of a cast part or a forged part.
  10. A wheel for bicycles with disc brakes, the wheel having a hub (10) having a hub shell (11) with a first spoke flange (13), with a second spoke flange (14) and with a through hole (12) in the hub shell for a wheel bearing axle, with a rim ring (1) which is non-rotatably connected to the hub (10) by means of spokes (2), and with a brake disc (3), wherein the first spoke flange and the second spoke flange are respectively provided with a plurality of spoke retaining holes arranged on a pitch circle around a wheel axle, to which holes the spokes are anchored with spoke heads, and wherein the second spoke flange is provided with a fastening device for a brake disc comprising screw holes, characterized in that the hub is according to any of claims 1 to 9.
  11. The wheel according to claim 10, characterized in that the bolt circle (19) on which the screw holes (17) are arranged, has a diameter of at least 75 mm.
  12. The wheel according to claim 11, characterized in that a brake disc is screwed to the second spoke flange, wherein the brake disc has eight fastening points for threaded screws to pass through, wherein the fastening points are arranged on a bolt circle with a diameter which, matching to the bolt circle of the screw holes is larger than 75 mm, in particular larger than 90 mm, more preferably larger than 110 mm, and in particular preferably 120 mm, and respectively one fastening point is fastened to one of the screw holes on the second spoke flange by means of a threaded screw.
  13. The wheel according to claim 12, characterized in that a sensor ring is assigned to the brake disc as an additional separate element, wherein the sensor ring has retaining webs with retaining holes that protrude radially inwards and each retaining hole of the sensor ring is fastened to a fastening point by means of one of the threaded screws for the brake disc.
  14. Brake disc for fixing to a wheel characterized in that the wheel is according to one of claims 10 to 13, wherein the brake disc has eight fastening points for threaded screws to pass through, wherein the fastening points are arranged on a bolt circle with a diameter which, matching to the bolt circle of the screw holes is larger than 75 mm, in particular larger than 90 mm, more preferably larger than 110 mm, and in particular preferably 120 mm, and respectively one fastening point is fastened to one of the screw holes on the second spoke flange by means of a threaded screw.

Description

The invention relates to a hub for wheels of bicycles with disc brakes, having a hub shell with a first spoke flange, with a second spoke flange and with a through hole for a wheel bearing axle in the hub shell, wherein the first spoke flange and the second spoke flange are respectively provided with a plurality of spoke flanges arranged on a pitch circle around a wheel axle and wherein the second spoke flange is provided with a fastening device comprising screw holes for a brake disc. The invention also relates to a wheel with a corresponding hub for bicycles with disc brakes. For many years, bicycles have not only been equipped with classic rim brakes, but also with disc brakes. Different solutions exist for fastening the brake disc to the wheel of a bicycle. A standardized solution relates to the fastening of the brake disc to the hub by means of a centre lock system on the hub, for which the hub is provided with a multi-tooth profile outside of one of the two spoke flanges, onto which a fastening collar with a matching multi-tooth profile is pushed, which is then secured by means of a locking ring (see US 6371252B1). As a rule, the locking collar has 5 arms with a corresponding number of screw holes, to which a correspondingly suitably formed brake disc can be fastened. Another standard provides a 6-hole fastening of the brake disc. The screw holes are located on a bolt circle with a standardized inner diameter of 44 mm. The screw holes can be formed directly on the hub, or the screw holes can also be part of an adaptor, as is described for example in DE 200 23 358 U1. The brake forces to be absorbed and mastered increase with increasing speed for bicycles and the weight of the vehicles; in the case of electric bicycles, the basic weight already increases considerably due to the additional components such as the motor or battery. Added to this is the weight of the vehicle driver, and by means of suspension systems etc. increasingly difficult gradients and route conditions can be mastered with a bicycle as for example a mountain bike. In order to improve the brake effect, the trend is towards larger brake discs, which have the additional advantage of better heat dissipation. However, this can lead to reduced lateral rigidity of the brake disc, which is why brake manufacturers sometimes fall back on to stronger material strengths for the brake discs or use multi-part brake discs. Both approaches increase the cost and/or also lead to even higher weights. A hub for wheels of bicycles with disc brakes is known for example from document WO 2018/032047 A1. It is the object of the invention to provide a hub for wheels of bicycles with disc brakes, in which brake discs with large diameters can also be fastened while avoiding the aforementioned problems. To solve this object, the invention proposes that the second spoke flange has a larger diameter than the first spoke flange and that the spoke retaining holes on the second spoke flange are arranged on an outer pitch circle with a larger radius around the wheel axis than the spoke retaining holes on the first spoke flange, and that the screw holes on the second spoke flange are arranged radially offset outwardly relative to the spoke retaining holes on the second spoke flange on a bolt circle whose diameter is preferably at least 75 mm. Due to the larger bolt circle and the enlarged spoke flange, the brake forces can be better dissipated and, above all, less leverage results between the brake calliper and the spoke flange of the hub, whereby a more direct brake feel is reduced at lower loads. The bolt circle preferably has a diameter which is larger than 90 mm, more preferably larger than 110 mm and particularly preferably 120 mm. A dimension of 120 mm still allows the addition of an ABS sensor ring. In the particularly preferred design, the second spoke flange has twice as many spoke retaining holes than screw holes, and a design in which the second spoke flange has eight screw holes and then correspondingly 16 spoke retaining holes, is particularly preferred. In order to facilitate lacing of the wheel at the same time, it is particularly advantageous that according to the invention the second spoke flange of the hub has a base projection for each screw hole, wherein the screw holes are preferably respectively arranged in face sections of the base projections and are axially and radially offset from the spoke retaining holes. With this design, a variant is particularly advantageous in which each base projection has a base with an axially extending recess and is respectively positioned in the region of one of the recesses of one of the spoke retaining holes. In order reduce weight, it is particularly advantageous if the second spoke flange is provided with pocket depressions or breakthroughs in a flange face between the through hole and the spoke retaining holes, wherein the pocket depressions or breakthroughs are preferably arranged rotationally symmetric to the