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.

Apparatus and method of belt dynamic tension measurement

Abstract: A method and apparatus for measuring an operating front end accessory belt tension using a hubload transducer and a torque transducer The hubload transducer (100) comprises concentric rings with a strainable member (102) disposed in a coplanar fashion between an inner (101) and outer (103) ring The hubload transducer is used with a non-torque transmitting idler pulley The torque transducer comprises a strainable cylindrical member connected to a belt bearing surface and a rotating shaft The torque transducer will transmit a torque to a driven accessory It is used on accessories such as an air conditioner compressor or power steering pump Signals from the hubload transducer and torque transducer are used to calculate a drive efficiency as well as belt span tensions between the driver and driven accessories

SURALP: A new full-body humanoid robot platform

Abstract: SURALP is a new walking humanoid robot platform designed at Sabanci University - Turkey. The kinematic arrangement of the robot consists of 29 independently driven axes, including legs, arms, waist and a neck. This paper presents the highlights of the design of this robot and experimental walking results. Mechanical design, actuation mechanisms, sensors, the control hardware and algorithms are introduced. The actuation is based on DC motors, belt and pulley systems and Harmonic Drive reduction gears. The sensory equipment consists of joint encoders, force/torque sensors, inertial measurement systems and cameras. The control hardware is based on a dSpace digital signal processor. A smooth walking trajectory is generated. A variety of controllers for landing impact reduction, body inclination and Zero Moment Point (ZMP) regulation, early landing trajectory modification, and foot-ground orientation compliance and independent joint position controllers are employed. A posture zeroing procedure is followed after manual zeroing of the robot joints. The experimental results indicate that the control algorithms presented are successful in improving the stability of the walk.

Belt type continuously variable transmission

Abstract: PROBLEM TO BE SOLVED: To miniaturize the belt type continuously variable transmission and to improve responsiveness of start accelerating ability and gear change control SOLUTION: This belt type continuously variable transmission comprises a primary pulley 23 having a fixed side pulley 24 fixed to a primary shaft 21 and a movable side pulley 25 mounted axially slidably, and a secondary pulley 26 having a fixed side pulley 27 fixed to a secondary shaft 22 and a movable side pulley 28 mounted axially slidably A metallic belt 29 is hung on both the pulleys 23 and 26 Respective sylinders 34 and 37 are integrally molded with the movable side pulleys 25 and 28 by plastically machining, and annular wall parts 48 and 44 are integrally molded with the fixed side pulleys 24 and 27 by plastically machining The fixing side pulleys 24 and 27 are joined and fixed separately from respective shafts 21 and 22 COPYRIGHT: (C)2002,JPO

Belt idler construction

Abstract: An idler mechanism for maintaining tension on a drive belt of a belt drive system. The idler mechanism includes a pulley mounted to an idler arm for rotation about a rotational axis. The idler arm is attached to mounting apparatus having a resilient and damping element for eliminating vibration and dissipating shock loads on the belt and establishing tension in the belt. In the preferred embodiment the resilient and damping element comprises a torsional bushing having a torsional axis parallel to the pulley rotational axis and a torsional member constructed from a block of resilient elastomeric material which provides both tension and damping.

Throttle valve control device in engine

Abstract: PURPOSE:To enhance the reliability of a throttle valve control device in an engine, by providing both an electrical control device for controlling the throttle valve by a motor or the like in accordance with the operating amount of an accelerator pedal and a mechanical control device for mechanically controlling the throttle valve so that the throttle valve may be controlled even if the electrical control device fails CONSTITUTION:A throttle valve 2 disposed in an engine intake-air passage 3 is provided with an electrical control device X comprising an accelerator opening degree sensor 14, a throttle valve control device 15, a motor 12, a pulley 5, a wire 12, etc, and a mechanical control device Y comprising a second pulley 6, a wire 13, etc The pulley 5 and the second pulley 6 are attached, at their side faces 5a, 6a opposed together, respectively with projecting pieces 8, 9 which are engaged together upon rotation of the pulleys When the motor is deenergized since the electrical control device X fails, the throttle valve 2 is returned to its full close position by a spring 16 However, when an accelerator pedal 1 is operated in this condition, the pulley 5 and the second pulley 6 are engaged and rotated together to open the throttle valve by a predetermined opening degree for controlling the engine