摘要:
The invention relates to an adapter for a rolling assembly having an axis of rotation and comprising a tyre that has two beads (B), a rim (J), said adapter providing the connection between one of the beads and the rim, said rim having two rim seats (7), said adapter having an axially inner end (10) intended to be mounted on the seat of the rim (7) and comprising an internal reinforcing element (16), an axially outer end (15) intended to be mounted on the seat of the rim (7) and comprising an external reinforcing element (15), a body (11) connecting said outer end (9) to said inner end (10) so as to form a single unit and comprising at least one main reinforcement providing the connection between said external reinforcement (15) and said internal reinforcement (16), a substantially cylindrical adapter seat (18) being intended to accept one of said beads (B), an adapter bearing face (21) more or less comprised in a plane perpendicular to the axis. This adapter is characterized in that the reinforcing element (15) of the axially outer end (9) is situated entirely axially on the outside of the bearing face (21), and in that the body (11) comprises, facing the adapter seat (7), a seat annular reinforcement (19).
摘要:
The invention relates to a method for testing the resistance of a tire to pressure loss after a perforation, characterized in that it comprises the following steps: creating, in the wall of the tire, a plurality of perforations by inserting a plurality of perforating objects through said wall; rolling the tire comprising the perforating objects over a given distance with a controlled inflation pressure; stopping the rolling; and determining, for each perforation, an index of resistance to pressure loss on the basis of an estimation of the leakage rate of the perforation.
摘要:
A pneumatic tyre includes an internal sealing layer, which partially delimits an internal volume (V) of the pneumatic tyre, and a self-sealing layer formed of at least a self-sealing product. The self-sealing layer is positioned radially on an inside region with respect to the internal sealing layer, and has a creep resistance indicator that increases axially from a median plane outwards, i.e., towards outside of the pneumatic tyre.
摘要:
The invention relates to an adapter for a rolling assembly having an axis of rotation comprising a tyre having two beads, a rim having a well (13) positioned between two rim seats (12) each having an axially outer end, said rim having a total width W between each axially outer end of said two rim seats, said adapter making the connection between each bead and each rim seat, said adapter having two axially outer ends (2) each comprising an adapter seat (3) and an adapter bearing face (4) substantially comprised in a plane perpendicular to the axis of rotation, a body (5) connecting said two axially outer ends (2) so as to form a one-piece component and comprising at least one main reinforcement, a face (16) intended to be in contact with each rim seat (12) and with the well (13) and arranged radially on the inside said adapter having a total axial width L comprised between each adapter seat (3). The invention is characterized in that the ratio W/L is greater than or equal to 20 and less than or equal to 60% and in that said body comprises an immobilizing element (8) intended to immobilize said adapter in the well (13).
摘要:
The invention relates to an adapter for a rolling assembly having an axis of rotation and comprising a tyre having two beads, a rim, said adapter providing the connection between one of the rib beads and the rim, said rim having two rim seats (7), said adapter having an axially internal end (10) intended to be mounted on the seat of the rim and comprising an internal reinforcing element (16), an axially external end (9) intended to be mounted on the seat of the rim and comprising an external reinforcing element (15), a body (11) connecting said external end to said internal end in such a way as to form a single unit and comprising at least one main reinforcement providing the connection between said external reinforcement and said internal reinforcement, a substantially cylindrical adapter seat (18) intended to accept one of said beads, an adapter bearing face (21) substantially comprised in a plane perpendicular to the axis of rotation. The adapter is characterized in that the reinforcement of the axially external end is entirely outside the bearing face, and in that the body comprises, facing the adapter seat, a seat annular reinforcement that has a compression modulus of 1 GPa or more.
摘要:
A reinforced product (21) comprises: - an elastomer matrix (23), - several reinforcing elements (44) embedded in the elastomer matrix (23), the reinforcing elements (44) being arranged side by side in a main direction (X1), each reinforcing element (44) comprising: - several wired elements (46), and - at least one shared sheath collectively coating the wired elements (46) and comprising at least one layer of a thermoplastic polymeric composition. The ratio R1=ODO/E of the mean minimum thickness ODO of elastomer present on the back of the sheath to the mean thickness E of the reinforced product (21) is less than or equal to 0.17, the mean minimum thickness ODO of elastomer and the mean minimum thickness E of the reinforced product (21) being measured in a direction substantially perpendicular to the main direction (X1).