elevator drive for driving and detaining an elevator car, process for driving and detaining an elevator car and elevator installation

摘要

elevator drive for driving and detaining an elevator car, process for driving and detaining an elevator car and elevator installation the present invention relates to an elevator drive (20) that serves for driving and detention of an elevator car and it substantially contains a traction wheel (22), to transmit a driving force and / or detention force to the elevator car, a motor (21) for driving the traction wheel (22) , and a braking arrangement for holding the drive wheel (22). a drive shaft (2) joins the drive wheel, the motor and the braking arrangement to each other. the braking arrangement includes at least two brake devices (24.1, 24.2), according to the invention, the drive wheel (22) is disposed between the brake devices (24.1, 24.2). this is advantageous, since the braking moments (mb1,2), which are transmitted from the drive wheel (22) to the brake devices (24.1, 24.2) are divided. in an advantageous symmetrical division of the brake devices (24.1, 24.2), in each case, in half, on both sides of the drive wheel, a moment on the drive shaft (2), to be transmitted, is reduced by half. in this way, a risk of failure or a risk of breakage of the drive shaft (2) is clearly reduced. furthermore, in the event of a failure of the drive shaft (2) there is still a braking function, since the brake devices (24.1, 24.2) are distributed on both sides of the drive wheel (22).