A method is disclosed of retrofitting an elevator machine with primary and secondary braking, the machine being disposed on a machine support frame in an elevator machine room, and engaging one or more ropes for providing selective movement of an elevator car disposed in an elevator shaft, the machine having a drive sheave including a cylindrical brake drum, and brake components including dual brake arms; the method including: removing the brake components; affixing flanged disc segments about the drum and interlocking the flanged disc segments to form a brake rotor; and mounting respective brake calipers to frame mounts for providing primary and secondary braking to the elevator machine.

A drive shaft for an elevator system, includes a support shaft and a traction sheave with at least one traction face for driving a traction mechanism, for example a drive belt, of the elevator system. A connection is provided for the transmission of a drive torque from the support shaft to the traction sheave, the traction sheave being of separate configuration from the support shaft. The traction sheave is held with an inner guide face on an outer guide face of the support shaft. The connection includes at least one axially projecting traction sheave-side circumferential stop which is in positively locking engagement with a support shaft-side circumferential stop.

A drive shaft for an elevator system, includes a support shaft and a traction sheave with at least one traction face for driving a traction mechanism, for example a drive belt, of the elevator system. A connection is provided for the transmission of a drive torque from the support shaft to the traction sheave, the traction sheave being of separate configuration from the support shaft. The traction sheave is held with an inner guide face on an outer guide face of the support shaft. The connection includes at least one axially projecting traction sheave-side circumferential stop which is in positively locking engagement with a support shaft-side circumferential stop.

A method is disclosed of retrofitting an elevator machine with primary and secondary braking, the machine being disposed on a machine support frame in an elevator machine room, and engaging one or more ropes for providing selective movement of an elevator car disposed in an elevator shaft, the machine having a drive sheave including a cylindrical brake drum, and brake components including dual brake arms; the method including: removing the brake components; affixing flanged disc segments about the drum and interlocking the flanged disc segments to form a brake rotor; and mounting respective brake calipers to frame mounts for providing primary and secondary braking to the elevator machine.

A method is disclosed of retrofitting an elevator machine with primary and secondary braking, the machine being disposed on a machine support frame in an elevator machine room, and engaging one or more ropes for providing selective movement of an elevator car disposed in an elevator shaft, the machine having a drive sheave including a cylindrical brake drum, and brake components including dual brake arms; the method including: removing the brake components; affixing flanged disc segments about the drum and interlocking the flanged disc segments to form a brake rotor; and mounting respective brake calipers to frame mounts for providing primary and secondary braking to the elevator machine.

The present invention relates to a wire rope suspension device, control method and multi-rope friction lift system, the device comprising: a first beam (6) and a second beam (9) which are passed by a wire rope (1) and fixed to the wire rope (1); a suspension joint (15), for connecting a lifting container (30); a suspension cylinder (14), having two ends respectively connected to the second beam (9) and the suspension joint (15); a wedge joint (8), being disposed in an accommodating chamber provided inside the second beam (9); and a wire rope bias limiting mechanism, being disposed between the wedge joint (8) and the second beam (9), for driving the wedge joint (8) to lock a wire rope section on one side of the wedge joint (8) itself and releasing movement restriction of a wire rope section on the other side of the wedge joint (8), when the second beam (9) has a displacement with respect to the first beam (6) in a predetermined direction. The present invention allows a convenient rope adjustment operation.

The present invention relates to a wire rope suspension device, control method and multi-rope friction lift system, the device comprising: a first beam (6) and a second beam (9) which are passed by a wire rope (1) and fixed to the wire rope (1); a suspension joint (15), for connecting a lifting container (30); a suspension cylinder (14), having two ends respectively connected to the second beam (9) and the suspension joint (15); a wedge joint (8), being disposed in an accommodating chamber provided inside the second beam (9); and a wire rope bias limiting mechanism, being disposed between the wedge joint (8) and the second beam (9), for driving the wedge joint (8) to lock a wire rope section on one side of the wedge joint (8) itself and releasing movement restriction of a wire rope section on the other side of the wedge joint (8), when the second beam (9) has a displacement with respect to the first beam (6) in a predetermined direction. The present invention allows a convenient rope adjustment operation.

The invention relates to a drive machinery for an elevator, the drive machinery comprising a rotatable drive sheave for driving plurality of ropes of the elevator, and a motor for rotating the drive sheave; the drive sheave comprising a drive sheave body rotatable around a rotational axis; and plurality of rim arrangements mounted on the drive sheave body side by side in direction of said rotational axis, each said rim arrangement defining a circular outer rim for transmitting traction to a rope, said circular outer rims being coaxial with each other. The diameter of the circular outer rim of one or more of said rim arrangements is individually adjustable for enlarging or reducing the turning radius of a rope passing around the circular outer rim in question. The invention also relates to an elevator comprising said drive machinery.

The invention relates to a drive machinery for an elevator, the drive machinery comprising a rotatable drive sheave for driving plurality of ropes of the elevator, and a motor for rotating the drive sheave; the drive sheave comprising a drive sheave body rotatable around a rotational axis; and plurality of rim arrangements mounted on the drive sheave body side by side in direction of said rotational axis, each said rim arrangement defining a circular outer rim for transmitting traction to a rope, said circular outer rims being coaxial with each other. The diameter of the circular outer rim of one or more of said rim arrangements is individually adjustable for enlarging or reducing the turning radius of a rope passing around the circular outer rim in question. The invention also relates to an elevator comprising said drive machinery.

Provided is an elevator device, in which a hoisting machine includes a main shaft, a brake drum rotatable about an axis of the main shaft, and a brake unit arranged at a position on a radially outer side of the brake drum. The brake unit includes a movable member and presses the movable member in an obliquely upward direction against an outer peripheral surface of the brake drum to apply a braking force to the brake drum. The car guide rail is retained by an upper rail bracket at a position higher than a position of the machine base. The brake unit is arranged at a position higher than the machine base and lower than the upper rail bracket.