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.