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.

Variable V-belt type continuously variable transmission for vehicles

Abstract: A variable V-belt type continuously variable transmission for vehicles which includes an input shaft and an output shaft, a first torque transmitting gear mechanism alternatively connectable with the input shaft and the output shaft, a countershaft connected to the first torque transmitting gear mechanism, a variable V-belt and pulley assembly, one end of which is connected to the countershaft, and a second torque transmitting gear mechanism connected to an opposite end of the variable V-belt and pulley assembly and alternatively connectable with the input shaft and the output shaft such that torque transmission from the input shaft to the output shaft occurs via a first route through the first torque transmitting gear mechanism, the countershaft, the variable V-belt and pulley assembly and the second torque transmitting gear mechanism and via a second route through the second torque transmitting gear mechanism, the variable V-belt and pulley assembly, the countershaft and the first torque transmitting gear mechanism. As an alternative, a gear mechanism can be used to substitute for the clutch members.

Wire-driving device for window regulator

Abstract: A wire-driving device for a window regulator comprising a worm wheel rotatably contained in a housing, first and second pulleys arranged at both sides of the worm wheel respectively, means for transmitting torque from worm wheel to the pulleys and a worm meshing with the worm wheel and being driven by a motor, whereby first and second wires wound round the pulleys respectively are driven. The motor driven wire-driving device is thinner than conventional devices.

Motor attachment for wheel chairs

Abstract: 665,928. Motor vehicles. DUKE, S. May 2, 1949 [Oct. 13, 1948], No. 11606/49. Class 79(iii) A motor attachment for a wheel chair comprises a platform, a traction wheel supporting the platform and driven by a motor on the platform, a shaft mounted in bearings depending from the platform and pivotally connected by a vertical pivot and an anti-friction bearing to an adjustable sectional transverse coupling having means at its end whereby it can be releasably connected to the wheel chair, and motor control means mounted on the chair. As shown the wheel chair having rear wheels 6 and front wheels 7 is steered by one of the front wheels being deflected through an arm 16, a shaft 13 and a handle 17. A button 18 carried by the shaft 13 controls an electric motor 21 mounted on the platform 25 and driving the traction wheel 27 through pulleys and driving belts. Rotatably mounted in depending bearing brackets 37 from the platform 25 is the shaft 38. The shaft 38 has a depending stem 40 connected by a ball bearing coupling 40a to the central section 41 of the adjustable coupling 41, 42, 43, the sections of which are connected together by bolts and slots. The 'end sections 42, 43 carry U-bolts 49 adapted to embrace lower frame tubes 3 of the chair.

Belt tensioning device

Abstract: A belt tensioning device including a mounting bracket, a pulley support arm pivotally mounted at one end on the mounting bracket and having an idler pulley rotatably mounted at its other end. A spring yieldably biases the arm in a direction to press the idler pulley against the belt. The arm has opposed wall faces disposed in planes perpendicular to the pivot axis of the arm and mounted on the bracket and have pad faces pressed into engagement with respective ones of the opposed wall faces on the arm to dampen vibration or oscillation of the arm.

Mechanical power transmission system

Abstract: A pulley configuration which increases the contact area between the pulley tooth tips and the land area of the belt teeth. The increased contact area reduces land area wear between belt teeth. The pulley tooth tip has a longitudinal cross-sectional contour partially composed of two substantially circular arcs connected by a line segment which is substantially straight or slightly curved. The length of the line segment is from 2 percent to 100 percent of the width of the belt tooth on which the pulley is used, and preferably less than about 7 percent of the width of the belt tooth. The pulley groove depth may be less than the height of the belt tooth and the groove has a longitudinal cross-sectional contour partially composed of two substantially circular arcs connected by a line segment which is substantially straight or slightly curved. The pulley in combination with a toothed belt forms a positive power transmission system.