FR2733941A3 - Wheel axle for bicycle - Google Patents

Abstract

The axle assembly has an axle (1) with threaded sections (111) at the end portions. A protrusion extends outwardly from each end portion and the re is a pair of bearing retainers (2) and a pair of cups (3). Each bearing retainer (2) includes an inner thread section (21) for connection to a threaded section of the axle, movement of the bearing retainers is stopped when engaging with the protrusion. Each cup is inserted into the end portion of the axle and has an extending portion (31) which forms a circular edge which limits the inward movement of the cup when inserted into the axle. A gear (4) is threadedly connected to the end portion of the axle next to the bearing retainer to which it applies an inwardly pressing force.

Description

I

  Wheel hub device, especially for a bicycle.

  The present invention relates to a wheel hub device and relates more particularly to a device

wheel hub for a bicycle.

  The wheel hub device A, as shown in FIG. 3, constitutes a transmission element for a bicycle and comprises two short parts A1 at its respective ends and two flanges A2 projecting inwards. Two bearing retaining elements B are force-fitted onto the respective short parts A1 and each retaining element B comprises a cup seat B 1 comprising a threaded section B 11l1 extending from this seat and a circular flange B2. Two cups C are inserted in the respective bearing retaining elements and are housed in the short parts A1, as shown in FIG. 4. Over time, the seat seat B of the force-fitted cup takes play with respect to the

  hub A under the effect of the traction force of the pinion.

  The object of the present invention is to provide a bicycle wheel hub device which uses threads to secure the two bowl seats to the respective ends of the hub.

  to improve the fixing between these seats and the hub.

  The object of the present invention is also to provide a device

  sitive forming a bicycle wheel hub which is relatively little

expensive to manufacture.

  Another object of the present invention is to provide a device forming a bicycle wheel hub which is easy to assemble.

and disassemble.

  The present invention will now be described with reference to the accompanying drawings, in which: FIG. 1 is an exploded view of a wheel hub device according to the present invention; Figure 2 is a side sectional view of the hub device according to the present invention; Figure 3 is an exploded view of a hub device according to the prior art; and

  FIG. 4 is a partial section view of the device for-

  mant prior art hub.

  We will now refer to Figures 1 and 2 which are given purely by way of illustration and not limitation. In Figure 1, the wheel hub device comprises a hub 1, a pair of bearing retainers 2 and a pair of cups 3

forming the present invention.

  The wheel hub 1 comprises two end parts 11 having threaded sections 111 and a projection 12 extending towards

  the outside (upwards in the figure) from each end part 11.

  Each bearing retaining element 2 comprises a threaded section 21 adapted to be coupled to the threaded section 111

of the hub.

  Each bowl 3 has a part extending outwards.

  laughing, from the bottom, so as to form a circular edge

  laire 31. To assemble the device of the present invention, each of the bearing retaining elements 2 is screwed onto the threaded section 111 until the retaining element 2 comes to bear against the projection 12. Then introduced to the press each cup 3, through the bearing retaining element 2, into the end portion 1 1 until the edge 31 of the cup 3 is stopped due to its coming into contact with the inner wall of the hub 1, as can be seen in FIG. 2. Then a pinion 4 is screwed in refusal onto the element 2 for retaining the bearing. Because the pinion 4 is screwed onto the thread 11 of the hub 1 and is adjacent to the seat of the cup, a force directed inwards is applied to the seat 2,

  thus preventing the bearing retainer 2 from loosening.

Claims (2)

  1. Device forming a wheel hub, in particular for a bicycle, this device comprising a hub (1), a pair of bearing retaining elements (2) and a pair of cups (3) and being characterized in that: said hub (1) comprises threaded sections (111) on the respective end parts (11) and a projection (12) extending outward from each said end part (11); and each of said retaining elements (2) comprises an internal threaded section (21), for screwing on each threaded section (111) of said hub.   2. Wheel hub device for a bicycle according to claim 1, characterized in that each of said cups (3) has a part which extends outwards from the lower part so as to form a circular edge (31) which, when the bowl is inserted into the press in the inner part of said part   end, is stopped by the inner wall of said hub (1).