Aircraft thrust reverser comprising a braking mechanism for slowing a mobile cowl in the event of overtravel

A thrust reverser for an aircraft propulsion unit, said thrust reverser comprising:

• a fixed structure;
• and
• a mobile external structure,
• said thrust reverser being configured to be placed in:
• a direct jet configuration wherein the mobile external structure is in a closed position, the mobile external structure in the closed position being able to guide a flow of fluid in the propulsion unit so as to generate a thrust, and
• a reverse jet configuration wherein the mobile external structure is in an open position, the mobile external structure in the open position releasing a radial opening capable of discharging a portion of said fluid flow from the propulsion unit so as to generate a counter-thrust,
• the movement of the mobile external structure from the closed position to the open position defining a positive sense of movement, wherein the fixed structure comprises a first braking element and the mobile external structure comprises a second braking element, the first and the second braking elements cooperating with each other by sliding with friction when the mobile external structure is moved in the positive sense beyond the open position so as to generate a braking force that opposes said movement, the first and the second braking elements being configured so that the braking force increases when the mobile external structure moves away from the open position;
• wherein said thrust reverser comprises a slide integral with one of the fixed structure and the mobile external structure and a sliding element integral with the other of the fixed structure and the mobile external structure, said slide forming a first slot configured to receive said sliding element, the slide forming a second slot forming one of the first and the second braking elements, the second slot being configured to receive the other of the first and the second braking elements,
• wherein said sliding element is a rail, and
• wherein said other of the first and the second braking elements is a peg integral with said rail, the peg projecting from the rail into the second slot.