Pulley

About: Pulley is a research topic. Over the lifetime, 51636 publications have been published within this topic receiving 178220 citations. The topic is also known as: drum & block.

Monitoring tension in an elongate flexible member

Abstract: A method of monitoring the tension in a flexible drive belt (1) which passes around a plurality of pulleys (2, 3) includes the steps of causing a portion of the belt (1) when installed around the pulleys to vibrate at a natural frequency and detecting that frequency. In one arrangement the belt (1) is set into a vibrating motion by an impulse and the frequency of the transient vibrations measured. In another arrangement the belt (1) is vibrated by a drive mechanism which receives a drive signal derived from the belt movement. Specific methods and apparatus for monitoring the tension are also applied to measuring the tension in elongate flexible members other than drive belts.

Pulley with integral fastener and spacer

Abstract: A one-piece metallic belt driven pulley has a hub, an annular belt engaging wall having an outer belt engaging surface and a radially extending web that connects the hub and belt engaging wall. The hub has an internal bore defined by a tubular inner surface. At least a portion of the tubular inner surface that defines the bore has a plurality of axially spaced threads to form an axially extending threaded portion. In use, the threaded portion of the bore is threaded onto an axially extending thread on an outer surface of the shaft to secure the pulley to the shaft. One end of the hub takes the form of a nut having a hexagonal outer configuration that is adapted to be engaged by a tool for screwing the pulley onto the shaft. The other end of the hub forms an axially extending integral spacer, the end of which is located outwardly of an end surface of the pulley.

Seat belt buckle pretensioner mounting mechanism

Abstract: An automotive seat belt buckle pretensioner assembly includes a special mounting bracket for supporting the operating components of a pyrotechnic-powered cable extending from the seat belt buckle around a cable-redirection pulley. The mounting bracket includes a flat major wall that is parallel to a major wall on the pulley support structure, so that the pulley is located within the space defined by the parallel walls. A bolt, or rivet, extending between the parallel walls provides shaft support for the pulley, while acting as a connector mechanism between the pulley support structure and mounting bracket.

Vehicle conveyor for parking pallets

Abstract: The parking pallets (1) are supported on endless conveyor belts (3) at the sides which are associated with a driving guide pulley (4) which is driven with a single shaft (11) to form the single drive element for the belts The pallet is lifted from the belt (3) by a lift mechanism whose rollers which support the pallet can rotate about rotary axes running perpendicular to those of the guide pulleys of the endless belts Each endless belt can be guided round two guide pulleys (4,5) between which are mounted several support rollers which support the upper side of the endless belt Each belt pref only extends over the dimensions of one pallet and several such belts can be arranged adjoining one another in modular formation

Continuous V-belt transmission

Abstract: A continuous V-belt transmission comprising: a primary pulley and a secondary pulley individually including two sheaves supported on shafts and made axially movable relative to each other; a belt made to run on the two pulleys; mechanical actuators individually including first members and second members for moving the movable sheaves of the two pulleys on the basis of the relative rotations of the two members: and pressure regulating mechanisms for applying an axial force corresponding to a transmission torque to at least one of the pulleys. In an unshifted state, the rotations of the pulleys are transmitted from the externally threaded portions integrated with the movable sheaves to the carriers of the planetary gear mechanisms so that they are transmitted through the ring gears to toe internally threaded portions on the basis of the sun gears being stopped. At this time, the externally threaded portions and the internally threaded portions are rotated integrally with the pulleys at the same r.p.m. If the sun gears are rotated through the shafts by the shift motor, the externally threaded portions and the internally threaded portions are rotated relative to each other to effect the shifting operation. At this time, the stroke of a ball screw unit is caused to match the stroke of the movable sheaves by non-circular gears.