| 摘要 |
The closing device comprises an actuator mechanism (3) and a hydraulic damper mechanism (5). The actuator mechanism (3) comprises a pushrod (10) which is urged by a resilient member (4) towards its extended position. The hydraulic damper mechanism (5) comprises a piston (22), a first rack and pinion gearing (15, 39) for converting the translational motion of the pushrod (10) into a rotational motion of a first pinion (39), a transmission (36, 38), which includes a second rack and pinion gearing (34, 35), between said first pinion (39) and said piston (22) for transmitting and converting the rotational motion of said first pinion (39) into a translational motion of the piston (22), a one-way valve (25) allowing fluid flow from a first side (26) to a second side (27) of the cylinder cavity (20) when opening the hinged member, and at least one restricted fluid passage between said first and second sides (26, 27) of the cylinder cavity (20). The transmission (36, 38) provides together with the pinions (35, 39) of the said first and second rack and pinion gearings a reduction gearing between the pushrod (10) and the piston (22) so that said piston (22) reciprocates over a smaller distance than said pushrod. The closing device can be compact, provides a smooth transition between opening and closing of the hinged closure member and is free of any oil leakages. |
