Abstract: A rack for a machine roomless elevator system, an elevator lifting drive, and an elevator system are disclosed. The rack includes: a base, configured to be fixed to an upper portion within an elevator shaft; a bracket, connected to the base and defining an accommodating space together with the base; and a rotating member, arranged in the accommodating space and rotatably supported on a support portion extending from the base towards the accommodating space, the rotating member having an engagement portion configured to engage a tension member, and rotating after receiving a driving force and driving an elevator traveling device connected to the tension member to travel along the elevator shaft through the tension member.

Abstract: An elevator system, a permanent magnet motor therefor, and a manufacturing method for a permanent magnet motor. The permanent magnet motor includes: a stator; and a rotor coupled to the stator, the rotor includes a rotor shaft and a permanent magnet assembly mounted to the rotor shaft, the permanent magnet assembly includes: a support member; and a plurality of magnet units attached to the support member along a circumference of the support member, each magnet unit includes: a first portion made of a first material and second portions made of a second material located on both sides of the first portion in a circumferential direction, the first portion has a greater remanence than that of the second portion.

Abstract: An elevator sheave liner, an elevator sheave assembly and an elevator system are disclosed. The elevator sheave liner is mounted in a groove of the elevator sheave and has a first end and a second end opposite to each other, the first end is provided with an engagement portion for engagement with an elevator tension member, and the elevator sheave liner includes a first section provided on at least one side of the elevator sheave liner and abutting against a surface of the groove after the elevator sheave liner is mounted in place, a first angle is formed between the first section and a longitudinal centerline of the elevator sheave liner and the first angle is set to be not greater than arctan (?1), ?1 is a coefficient of friction between the elevator sheave liner and the groove.

Abstract: An elevator braking device includes a first bracket having a first accommodating area and provided with a guiding member, and fixedly mounted relative to an elevator driving device; a second bracket having a second accommodating area and configured to move along the guiding member relative to the first bracket, the second accommodating area intersects with the first accommodating area to form a common area, volume of the common area changing with movement of the second bracket; and a control portion and a first friction member, the control portion is arranged in the common area and connected to the second bracket, and the first friction member is arranged adjacent to the control portion and is movable along the guiding member relative to the second bracket under control of the control portion.

Abstract: A method for online replacement and a method for installation of an elevator sheave liner, and an elevator sheave liner. The method for online replacement of an elevator sheave liner includes rotating an elevator sheave provided with a liner including a plurality of assemblable sections such that at least one section to be replaced in the liner is rotated to an operating area, wherein the section to be replaced is not engaged with an elevator rope provided on the elevator sheave when in the operating area; detaching the section to be replaced from the elevator sheave, and installing a replacement section for replacing the section to be replaced onto the elevator sheave; and repeating steps until all or part of sections to be replaced in the liner are replaced.

Abstract: An elevator braking device includes a body, with its interior accommodating at least a part of a brake disc, and a support member axially fixed relative to the brake disc; a guide member connected to the support member, wherein the body is movable relative to the brake disc along the guide member; a first friction member and a control portion which are arranged inside the body and adjacent to a first side of the brake disc, wherein a part of the control portion is connected to the body, and the first friction member moves along the guide member under control of the control portion to be in contact with the first side to perform a braking operation in a first state, and to be out of contact with the first side in a second state, respectively.

Abstract: A friction material, a preparation method therefor, and a friction part. The friction material contains the following components by weight percentage: 24%-31% of a nitrile rubber, 0.35%-1% of a vulcanizing agent, 0.35%-0.6% of a vulcanization activator, 0.4%-0.8% of a promoter, 0.06%-0.11% of a scorch inhibitor, 1.5%-2.4% of ZnO, 24%-31% of a thermoplastic phenolic resin, 1.5%-2.2% of a plasticizer and 15%-25% of white carbon black, and optionally: 0%-25% of a filler, 0-0.8% of an anti-aging agent, and 0-2.4% of MgO.

Abstract: A tractor assembly and an elevator. The tractor assembly includes: a traction sheave, having a traction means fitting surface and a first transmission surface on a peripheral surface thereof; a plurality of support wheels, configured to support the traction sheave, and each having a second transmission surface on a peripheral surface thereof; and support wheel bases, configured to support the support wheels through support shafts, wherein the first transmission surface of the traction sheave is in transmitting cooperation with the second transmission surfaces of the plurality of support wheels respectively. According to the tractor assembly and elevator of the present application, the support wheels are disposed to achieve the transmitting cooperation of the traction sheave during operation of the elevator and support the traction sheave, thus omitting the load and drive bearings required by a conventional traction sheave.

Abstract: A friction material, a preparation method therefor, and a friction part. The friction material contains the following components by weight percentage: 24%-31% of a nitrile rubber, 0.35%-1% of a vulcanizing agent, 0.35%-0.6% of a vulcanization activator, 0.4%-0.8% of a promoter, 0.06%-0.11% of a scorch inhibitor, 1.5%-2.4% of ZnO, 24%-31% of a thermoplastic phenolic resin, 1.5%-2.2% of a plasticizer and 15%-25% of white carbon black, and optionally: 0%-25% of a filler, 0-0.8% of an anti-aging agent, and 0-2.4% of MgO.

Abstract: An electromagnetic device for an elevator brake, an elevator brake and an elevator system. The electromagnetic device is configured to be provided in the number of at least two in the elevator brake, and each of the electromagnetic devices includes: a fixed member, which is fixed relative to an elevator power device and provided with at least one electromagnetic member for providing an electromagnetic force after being energized; a movable member, which is arranged between the fixed member and a friction member of the elevator brake, and arranged to be movable relative to the fixed member; and a force supply member, which is arranged to provide a force in an opposite direction to the electromagnetic force to the movable member.

Abstract: An elevator braking device and an elevator system are provided by the present disclosure. The elevator braking device includes: a fixed frame; a floating bracket, which is disposed on the axial guide of the fixed frame and movable along the axial guide; a movable plate supported by the floating bracket, the movable plate having a second friction plate on a second side of the brake disc; an actuator; and a position self-adjusting member which includes a magnetic portion to act on the magnetic member on the floating bracket such that after the braking state is released, the floating bracket tends to move towards a balanced position, thereby reducing a difference between a first gap G1 between the first friction plate and the brake disc and a second gap G2 between the second friction plate and the brake disc.

Abstract: An elevator braking device and an elevator system are provided by the present disclosure. The elevator braking device includes: a fixed frame; a floating bracket, which is disposed on the axial guide of the fixed frame and movable along the axial guide; a movable plate supported by the floating bracket, the movable plate having a second friction plate on a second side of the brake disc; an actuator; and a position self-adjusting member which includes a magnetic portion to act on the magnetic member on the floating bracket such that after the braking state is released, the floating bracket tends to move towards a balanced position, thereby reducing a difference between a first gap G1 between the first friction plate and the brake disc and a second gap G2 between the second friction plate and the brake disc.

Abstract: The present application provides a tractor assembly and an elevator. The tractor assembly includes: a traction sheave, having a traction means fitting surface and a first transmission surface on a peripheral surface thereof; a plurality of support wheels, configured to support the traction sheave, and each having a second transmission surface on a peripheral surface thereof; and support wheel bases, configured to support the support wheels through support shafts, wherein the first transmission surface of the traction sheave is in transmitting cooperation with the second transmission surfaces of the plurality of support wheels respectively. According to the tractor assembly and elevator of the present application, the support wheels are disposed to achieve the transmitting cooperation of the traction sheave during operation of the elevator and support the traction sheave, thus omitting the load and drive bearings required by a conventional traction sheave.

Abstract: The present invention provides an elevator brake and a cushion replacement method of the elevator brake, and relates to the field of elevator braking technologies. The elevator brake of the present invention includes a first block and a second block that collide with each other during braking, and a cushion located between the first block and the second block, and further includes a cushion support detachably mounted on the first block or the second block, where the cushion is disposed on the cushion support. A cushion of the elevator brake in the present invention can be replaced without disassembling the whole elevator brake.

Abstract: The present invention provides an elevator brake and a cushion replacement method of the elevator brake, and relates to the field of elevator braking technologies. The elevator brake of the present invention includes a first block and a second block that collide with each other during braking, and a cushion located between the first block and the second block, and further includes a cushion support detachably mounted on the first block or the second block, where the cushion is disposed on the cushion support. A cushion of the elevator brake in the present invention can be replaced without disassembling the whole elevator brake.