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.

Positive geared tracking pulley and belt for a reversible conveyor belt system

Abstract: A reversible conveyor belt system has, on at least one surface of the belt, projections arranged preferable in a plurality of asymmetrical rows and columns thereby forming a matrix engagable with an offset mating tracking surface glued to the surface of the pulley The projections are truncated geometrical solids, pyramids, extending outwardly from the surface of the belt When the truncated solids of the belt intermesh in the tracks provided between the rows of truncated solids on the pulley, positive alignment without creep, improved timing and increased drive force are achieved The projections may be used on both sides of the belt, and a second belt with interlocking projections may be mounted around a second pulley and positioned beneath the main conveyor belt for heavy impact loads The drive system includes an easily removable hub assembly wherein the shaft of the pulley defines a flat area which engages a hardened dowel wedge for providing positive drive with reduced shear

Interactive design for additive manufacturing: a creative case of synchronous belt drive

Abstract: As a digital and direct manufacturing technology, additive manufacturing (AM) presents a powerful and unrestrained revolution for creative design. However the breakthrough in manufacturing technology is yet to be followed by a breakthrough in design. Firstly, the state-of-the-art overview of the existing design methods for AM is presented. Furthermore, as part of a fully 3D printed robot we envisioned, this work mainly put forward a novel synchronous belt drive as an illuminating case with the potential and constraints of AM. After capturing the flexibility based on shape innovation, a new type of continuous trapezoidal tooth belt transmission without matrix was designed. Next, using the nonlinear finite elements method, the effect laws of belt’s parameters such as tooth height, tooth width, wedge angle and belt thickness were studied on the carrying capacity of belt transmission with pre-tensioning. Moreover, a new type of synchronous belt and timing pulleys were made via the 3D printing process of fused deposition modeling with the flexible polylactic acid (PLA) material. Lastly, a driving test was carried out and the experimental results showed that the presented 3D printed trapezoidal tooth belt transmission was stable, and could meet the requirements of low speed, small power transmission, especially apt to digital design and customization. This work completely demonstrates the intrinsic nature of digital design, interactive design and custom design from/with/for AM, as well as the ever-expanding room for innovation.

Differential drive pedestal gimbal

Abstract: A pedestal gimbal drive assembly includes a yoke and a cross shaft mounted for movement about separate orthogonal axes for affording a sensing platform for being driven by differential drive mechanism for sweeping a hemispherical segment. One embodiment of the drive means includes an endless cable drivingly connected by means of two separate reversible motors to a pair of fixed pulleys on the platform and trailed over a plurality of idler pulleys and operative to move the platform in the desired motion. An alternate embodiment includes a driven gear connected to the ring and a pair of bevelled gears connected to the driven gear and connected by link members to the two independent reversible motors.

Pulley tensioner for an oil wet belt drive

Abstract: A tensioner (1) for a belt drive, comprises a base (2) defining an axis (A), a mobile eccentric element (3) hinged about axis (A) and loaded by a spring (5), a pulley (4) idly connected to the mobile element (3). Specifically, the pulley (4) defines a single body with the external ring of a rolling bearing (6) mounted on the mobile element (3) and the spring (5) is helical and presents a square or rectangular cross section.