| 摘要 |
The invention relates to a pressure relief latch for aircraft, able to absorb vibrations and shocks without inopportune opening, as well as to adapt to dimensional stresses during its assembly. The latch includes: a console, a lever mounted on the console, and an opening effort exerted on a fulcrum of the lever causing an angular displacement of the fulcrum between a closing position and an opening position. The latch also includes a roller able to roll against a profile of the lever and connected to an elastic return device. The latch further being provided with means able to vary the angular displacement of the fulcrum of the lever according to the opening effort, with two different slopes according to an opening effort E1. |
| 主权项 |
1. Pressure relief latch (30, 130, 230) for assembling in a removable way an aircraft panel (51) with an aircraft structure (53), said latch including:
a console (31, 131, 231) able to be connected to the panel (51); a lever (34, 134, 234) mounted on the console so as to rotate about a first axis (35, 135, 235), an opening effort (E) exerted on a fulcrum (46, 146, 246) of the lever causing an angular displacement (D) of said fulcrum relative to the first axis, between a closing position and an opening position, a roller (37, 137, 237) arranged along a second axis (39) substantially parallel to the first axis, able to roll against a profile (36, 136, 236) of the lever when said lever moves between said positions, said roller being connected to a first end (41) of at least one elastic return device (42, 142, 242), one second end (43) of said device being connected to the console, the latch being characterized in that it is provided with means (47, 48, 136, 260) able to vary the angular displacement (D) of the fulcrum of the lever according to the opening effort so that: between a minimal opening effort E0 and an intermediate opening effort E1, the function D=f(E) has a slope higher than a value (X), between the intermediate effort E1 and a maximum opening effort E2, the function D=f(E) has a slope lower than said value (X), said maximum effort E2 corresponding to a maximum pressure between the panel and the structure, beyond which the opening position is reached, said means (47, 48, 136, 260) being supported by the elastic return device and/or the profile of the lever and/or the fulcrum of the lever.
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