Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1983-02-18
1985-09-03
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29429, 301 74, B21F 3900
Patent
active
045383324
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and device for introducing spokes into the holes provided in the flanges of wheel hubs, particularly for bicycles.
Spoke wheel hubs generally comprise a central cylindrical shaft, limited at both ends by two perpendicular flanges comprising a ring of holes for receiving the ends of the spokes connecting the hub to the rim of the wheel. In the ring of holes, the free legs of the spokes are introduced alternately from the outside and from the inside.
The introduction of spokes into the rings of holes has been done up to now by hand. For that, the hub was fixed along a vertical axis, then the spokes were introduced from the top into one hole out of two in the upper and lower flanges; then the half spoked hub was rotated through one hundred and eighty degrees for introducing, again from the top, the spokes into the remaining holes. This work required much time and skill and it could happen that the spokes got tangled up during the one hundred and eighty degree rotation.
The present invention has more especially as object to obviate the disadvantages of known methods by proposing a new method for modifying the introduction of the spokes into the rings of holes of the hubs, this method allowing this work to be carried out automatically and speedily.
Another object of the invention is to propose a device for implementing this method, which is particularly efficient and inexpensive.
Another object of the invention is to propose such a device which allows spokes to be threaded on hubs of different sizes and having different numbers of holes.
Another object of the invention is to propose a device for threading spokes on to hubs having boring defects, and more particularly misalignment of the holes formed in the two flanges.
For this, and according to one feature of the invention, the hub is disposed horizontally and its rotation is controlled by drive means allowing a braking torque to be provided greater than the drive torque produced by the weight of the spokes mounted on the hub; the hub is rotated so as to bring it into a predetermined position; two consecutive spokes are threaded into the corresponding holes of each flange in predetermined directions so that they pass to one side of the other flange and, after introduction, the spokes are left to hang under the action of their own weight; then the hub is rotated to bring into the predetermined position the first free hole preceding the holes filled with spokes; the threading of the spokes and rotation of the hub are continued until all the spokes are introduced and the hub is withdrawn. This method avoids having to rotate the half spoked hub through one hundred and eighty degrees. Furthermore, the rings of holes in the two flanges are provided with spokes at the same time and in a given order and position, so that the spokes do not get entangled with each other and the method may be automated.
According to another feature of the invention, during threading, the spokes are introduced in a descending zone of the hub on the same side with respect to the vertical passing through the axis of the hub and into the holes disposed above holes possibly filled with spokes, so that after threading the spokes are piled up above each other under the action of their weight.
According to another feature of the invention, during the threading step, the lower spoke is introduced first of all then the upper spoke of a first flange, then the lower spoke and the upper spoke of the second flange, so as to allow piling up of the spokes under the effect of their own weight, to avoid crossing of the spokes and of the devices ensuring the threading.
According to another feature of the invention, the device for implementing the method comprises a support associated with braking means for holding a hub in a horizontal position, drive means for imparting a rotational movement of the hub to a predetermined angular position; means for threading spokes into each of the flanges, presenting these spokes in succession in a substantially horizontal positi
REFERENCES:
patent: 1801271 (1931-04-01), Heider
patent: 3606474 (1971-09-01), Meiklejohn
patent: 3711916 (1973-01-01), Meiklejohn
Centre de Production Mecanique
Echols P. W.
Goldberg Howard N.
Plottel Roland
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