초록 ▼

A linear telescopic actuator (1) that comprises a cylinder (2), a sliding part (3), a spring seat (4) and a first compression spring (5) capable of resiliently opposing the sliding part (3) approaching the spring seat (4). The spring seat (4) presents an outer annular groove (6) and the cylinder (2)

A linear telescopic actuator (1) that comprises a cylinder (2), a sliding part (3), a spring seat (4) and a first compression spring (5) capable of resiliently opposing the sliding part (3) approaching the spring seat (4). The spring seat (4) presents an outer annular groove (6) and the cylinder (2) includes an inner annular groove (7). The actuator (1) also presents a blocking part (8), the actuator (1) being adapted to adopt selectively an assembled configuration and a disassembled configuration. The blocking part (8) in the assembled configuration is engaged inside the inner and outer annular grooves (6, 7). The blocking part (8) in the disassembled configuration being disengaged from one of the grooves so as to allow spring seat (4) to slide in the cylinder (2).

대표청구항 ▼

1. A linear telescopic actuator (1) comprising: a cylinder (2);a sliding part (3) extending at least in part inside the cylinder (2) in order to slide therein along a sliding axis (X-X′);a spring seat (4) that is arranged at least in part inside the cylinder (2); andat least a first compression spri

1. A linear telescopic actuator (1) comprising: a cylinder (2);a sliding part (3) extending at least in part inside the cylinder (2) in order to slide therein along a sliding axis (X-X′);a spring seat (4) that is arranged at least in part inside the cylinder (2); andat least a first compression spring (5) arranged inside the cylinder (2) between said sliding part (3) and the spring seat (4) in order to be capable of resiliently opposing the sliding part (3) approaching the spring seat (4), the actuator being characterized in that: the spring seat (4) presents an outer annular groove (6) and the cylinder (2) includes an inner annular groove (7), the actuator (1) further presenting a blocking part (8), the actuator (1) being adapted to adopt selectively an assembled configuration and a disassembled configuration, the blocking part (8) in the assembled configuration being engaged inside the inner and outer annular grooves (6, 7) and forming an obstacle opposing sliding of the spring seat (4) relative to the cylinder (2), and the blocking part (8) in the disassembled configuration being disengaged from at least one of the inner and outer annular grooves (7, 6) in order to allow the spring seat (4) to slide relative to the cylinder (2), the blocking part (8) and the inner and outer annular grooves (7, 6) being adapted: A) to allow the actuator to pass from its assembled configuration to its disassembled configuration when a first force (F1) is exerted on the spring seat (4) along said sliding axis (X-X) in a first direction (S1) going from the spring seat (4) towards the spring (5), this first force (F1) presenting a first magnitude greater than a predetermined minimum threshold; and B) to prevent the actuator from passing from its assembled configuration to its disassembled configuration: when a force is exerted on the spring seat (4) in said first direction (S1) with a magnitude less than or equal to the predetermined minimum threshold; orwhen a force (F2) is exerted on the spring seat (4) in a second direction (S2) opposite to said first direction (S1). 2. The actuator according to claim 1, wherein the blocking part (8) is an open resilient ring adapted under the action of said first force (F1) to disengage from the outer annular groove (6) of the spring seat by moving towards the inside of the inner annular groove (7) of the cylinder (2) in such a manner as to allow the spring seat (4) to move relative to said cylinder (2) in said first direction (S1). 3. The actuator according to claim 2, wherein the outer annular groove (6) of the spring seat (4) presents first and second shoulders (9, 10) arranged to be on either side of the blocking part (8) when the actuator (1) is in the assembled configuration, the first shoulder (9) being arranged to oppose any movement of the spring seat (4) relative to the cylinder (2) in the first direction (S1), and the second shoulder (10) being arranged to oppose any movement of the spring seat (4) relative to the cylinder (2) in the second direction (S2), the outer annular groove (6) of the spring seat (4) presenting: a first outer radius of length R1 measured at its first shoulder; anda minimum outer radius of length Rmin measured between the first and second shoulders (9, 10);the inner annular groove (7) of the cylinder (2), the outer annular groove (6) of the spring seat (4), and the blocking part (8) being dimensioned so that then the actuator (1) is in the assembled configuration, the blocking part (8) is spaced apart from the bottom of the inner annular groove (7) of the cylinder by a distance Dx greater than the difference R1−Rmin. 4. The actuator according to claim 3, wherein the blocking part (8) is in the form of an open ring that is circular in section when observed in a radial section plane, the circular section being uniform over a major portion of the length of the open ring and presenting a radius R3, the outer annular groove (6) of the spring seat (4) presenting a second outer radius of length R2 measured at its second shoulder (10), the radius R3 being less than or equal to the difference R2−Rmin. 5. The actuator according to claim 4, wherein the blocking part (8) in the form of an open ring is resilient so as to exert a resilient force against the outer annular groove (6) of the spring seat (4) opposing any passage of the actuator (1) from its assembled configuration to its disassembled configuration. 6. The actuator according to claim 5, wherein a first end of the spring seat (4) presents an annular chamfer (13) designed to guide the blocking part (8) in the form of an open ring around the spring seat (4) while said spring seat (4) is displaced so as to bring the blocking part (8) closer to the outer annular groove (6) of the spring seat (4) while the blocking part (8) is in contact with the annular chamfer (13). 7. The actuator according to claim 6, wherein, said annular chamfer (13) and said blocking part (8) are designed so that the displacement of the spring seat (4) so as to bring the blocking part (8) closer to the outer annular groove (6) of the spring seat (4) can be achieved by applying an axial displacement force (F0) on the spring seat (4) which is inferior to 200 Newton. 8. The actuator according to claim 6, wherein a side of the annular grove (6) adjacent to the first annular chamfer (13) is formed by a second annular chamfer (14), said second annular chamfer (14) being designed to guide the blocking part (8) in the form of an open ring around the spring seat (4) while said spring seat (4) is displaced so as to move the blocking part (8) away from the outer annular groove (6) of the spring seat (4) while the blocking part (8) is in contact with said second annular chamfer (14). 9. The actuator according to claim 8, wherein, said second annular chamfer (14) a said blocking part (8) are designed so that the displacement of the spring seat (4) so as to move the blocking part (8) away from the outer annular groove (6) of the spring seat (4) can be achieved by exerting said first force (F1) on the spring seat (4) along said sliding axis (X-X) in a first direction (S1). 10. An aircraft, characterized in that it includes an actuator according to claim 1.