Abstract: A drive unit has at least one motor, a motor stand, a bearing block, a drive pulley and a counter-roller attachment. The drive pulley is mounted at the motor stand and at the bearing block by a shaft. A respective brake is arranged at the bearing block at each side. Webs connect the motor stand with the bearing block. The motor stand, the bearing block and the webs form a stable structure without an engine frame carrying the motor stand and the bearing block being necessary. A counter-roller attachment consisting of side plates and a counter-roller is arranged directly at the motor stand and the bearing block.

Abstract: An elevator drive unit includes an engine, an engine stand, a bearing block, a traction sheave and an engine frame with a counter-roller base. The stator of the electric drive is bolted, by means of a flange, to the engine stand. The rotor of the electric drive sits on a free end of a shaft bearing the traction sheave. The shaft is mounted to the bearing block and the engine stand. The traction sheave is mounted to the engine stand bearing block by means of the shaft. A brake is located within the engine stand and is protected by the casing.

Abstract: An engine frame and counter-roller support assembly provides for adjustable positioning of the support with respect to the engine frame, thus allowing differing cable-line spacing to be accommodated. The support includes a pair of carrier elements. The counter-roller is supported on an axle in the bore holes of the carrier elements. The carrier elements are identical and each are in the form of a plate with a headliner and reinforcement ribs. The headliner has a contact surface with a number of two-stage bore-holes which serve for the fastening of the counter-roller support to the engine frame. The bore-holes are arranged such that the counter-roller support can be fastened in different positions, according to the required cable-line spacing between cab cables and counterweight cables.

Abstract: An emergency drive is a toothed element such as a gear rim, is arranged on a traction sheave of an elevator drive. During emergency operation, the gear rim is driven by means of a pinion of an auxiliary engine. The engine is installed on the elevator drive only during an emergency operation. After emergency operation, the engine is removed from the drive unit. The gear rim may be composed of several layers of interlocked segments. The layers are mutually shifted in a circumferential direction. Each segment consists of laminated/interlocked sheet metal segments, which are, as mass-produced goods, cheaply producible through cutting and punching procedures.

Abstract: A lift drive unit support apparatus consists of multiple height-adjustable mounts, which conduct the forces of the drive unit to a foundation, fasten the drive unit in an earthquake-proof manner, and isolate it in terms of solid-borne sound from the foundation. The drive unit can be levelled in height by means of a tool, such as a shaft spanner, by way of an adjusting sleeve screwed into the engine frame. A foot plate inserted below the adjusting sleeve transmits vertical forces from the adjusting sleeve to a damping element. Horizontal forces are transmitted from the adjusting sleeve by way of a tube to a base plate and from there to an anchor bolt, which also prevents upward lift-off of the drive unit.