| 摘要 |
#CMT# #/CMT# The device has a friction disk (13) and a friction surface (11) connected in rotation to a shaft (1) and a body (2), respectively. A piston (20) is axially movable to push the disk and the surface. A ball (19a) and a support plate (18) are fixed in translation with respect to the body and driven in rotation by an electric motor (3), where the motor drives a driving shaft (4) by a reduction system (5). The plate or the piston are provided with a ramp (25) on which the ball is rolled in support on the piston and on the plate, where the ramp is inclined with respect to the shaft. #CMT# : #/CMT# An independent claim is also included for a transmission for a motor vehicle. #CMT#USE : #/CMT# Activable device for blocking rotation of a shaft with respect to a body for a transmission of motor vehicle (claimed) e.g. lorry. #CMT#ADVANTAGE : #/CMT# The device permits to lock the output shaft of a heat engine of a motor vehicle, thus permitting to improve the safety and permitting restarting of the vehicle in an efficient manner, while permitting to reduce force necessary to actuate the device. The device permits to eliminate mechanical clearance and improves liberation of friction disk. The ramp is inclined with respect to the shaft, thus permitting to exert an axial pressure force on the friction disk in a homogeneous manner, while permitting to avoid premature wear out points. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a shaft rotation blocking activable device. 1 : Shaft 2 : Body 3 : Electric motor 4 : Driving shaft 5 : Reduction system 11 : Friction surface 13 : Friction disk 18 : Support plate 19a : Ball 20 : Piston 25 : Ramp. |
