Drum and method for assembling an adapter for mounting a tire on a wheel rim

Patent metadata

Field	Value
Publication number	US-10946602-B2
Application number	US-201615776508-A
Country	US
Kind code	B2
Filing date	Nov 23, 2016
Priority date	Nov 25, 2015
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

A radially expandable building drum, in which is intended for manufacturing an adapter for mounting a tire on a wheel rim, includes a central shaft, a first set of segments, and a second set of segments. All of the segments are arranged circumferentially around the shaft to form a generally cylindrically shaped external face of the drum. The segments of the first set and the segments of the second set face one another axially. The drum is structured to allow a different radial expansion of the segments of the first set in relation to the segments of the second set, between two working positions.

First claim

The invention claimed is:

1. A radially expandable building drum for manufacturing an adapter for mounting a tire on a rim, the drum comprising:
a central shaft;
a first set of segments; and
a second set of segments,
wherein the segments of the first set and the segments of the second set are rigid and elongated elements arranged circumferentially around the central shaft to form a generally cylindrically shaped external face of the drum,
wherein the segments of the first set and the segments of the second set are axially juxtaposed,
wherein the segments of the first set and the segments of the second set are structured to enable a different radial expansion of the first set relative to the second set, between two working positions, and
wherein an axially internal face of the segments of the first set includes teeth that axially interpenetrate with teeth of an axially external face of the segments of the second set.

2. The drum according to claim 1 , wherein an external face of each segment of the first set and each segment of the second set includes a groove for accommodating a bead wire.

3. The drum according to claim 1 , further comprising a movement actuator structured to cause movement of the segments of the first set and the segments of the second set between:
a first working position in which the segments of the first set and the segments of the second set are in a retracted position, and in which the external face of the drum is substantially cylindrical in shape and has a single diameter along a length of the external face of the drum, and
a second working position in which the segments of the first set and the segments of the second set are in an expanded position, so that the segments of the second set exhibit a greater diameter than the segments of the first set, and so that the external face of the drum includes two parts of substantially cylindrical shape of different diameters.

4. The drum according to claim 1 , further comprising a single driver structured to drive movement of the segments of the first set and the segments of the second set simultaneously.

5. The drum according to claim 1 , further comprising a driver structured to drive movement of the segments of the first set and the segments of the second set at different speeds relative to one another.

6. The drum according to claim 5 , wherein each of the first set of segments and the second set of segments is moved in radial translation using respective screw and nut combination devices, with each screw of the screw and nut combination devices receiving rotational movement of the central shaft.

7. The drum according to claim 6 , wherein one of the screws of the screen and nut combination devices receives the rotational movement of the central shaft via a set of gears exhibiting a reduction ratio.

8. The drum according to claim 7 , wherein pinions of the set of gears are interchangeable and mounted so as to be able to be synchronized in any relative position.

9. The drum according to claim 6 , wherein each of the first set of segments and the second set of segments is connected to a corresponding one of the screw and nut combination devices by a respective articulated links mechanism.

10. The drum according to claim 1 , further comprising a flexible sleeve structured to cover the external face of the drum.

11. The drum according to claim 1 , further comprising a ply-turning device located at each end of the drum, each ply-turning device being radially expandable at a same time as a set of segments.

12. The drum according to claim 11 , wherein the ply-turning devices are retractable under the external face of the drum.

13. The drum according to claim 11 , further comprising a ply-turning actuator for actuating one of the ply-turning devices in an axial translational movement.

14. The drum according to claim 11 , further comprising a ply-turning actuator for actuating one of the ply-turning devices in an axial translational movement and in a radial translational movement.

Assignees

• Michelin & Cie

Inventors

• Guy Thomas
• Marchal Patrick
• Hinc Henri
• Hernandez David

Classifications

• B29D30/247 Primary

  Arrangements for the first stage only, e.g. means for radially expanding the drum to lock the beads (B29D30/245 takes precedence) · CPC title