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.

Coordinate-measuring machine

Abstract: A coordinate measuring machine with a drive and braking arrangement for a spindle sleeve which is displaceable in the Z-direction through the intermediary of a threaded spindle. A motor power output or take-off shaft and the threaded spindle, which are arranged axially-parallel relative to each other, are in a driving connection with each other through the interposition of a belt drive with a belt tensioning and supervisory or monitoring arrangement, whereby a brake pulley is flange mounted to the belt pulley for the drive of the threaded spindle, and a braking clamp or a disc brake acts on the brake shoes.

Electro-mechanical sun visor for motor vehicle windows

Abstract: An electrico-mechanical sun visor for motor vehicle windows comprising: (a) a sun shade screen (2a, 2b) rollable onto a spring-loaded roller, which housing is attached to the interior of the roof of the vehicle near the upper side of the window; (b) a bi-directional electric motor (3) connected to a power source; (c) a rotatable shaft (11a, 11b) driven forward and backward by the electric motor, said shaft being mounted parallel to the roller; (d) at least one rubber-like pulley (15) pressing against the shaft, so that the sun shade screen passes between the shaft (11) and the pulley; (e) two switches (18a, 18b) located at the opening of the roller housing where the sun shade screen passes, and each of which is connected to the electric motor for automatically stopping the feed-out and the retraction of the sun shade screen.

Belt tensioner with spring actuated band brake damping

Abstract: A belt tensioning device having an improved damping mechanism for damping movements of the pivoted structure rotatably carrying the pulley with respect to the fixed structure. The damping mechanism includes a strap and a ring mounted on their respective fixed and pivoted structures and with respect to one another such that the strap engages the ring with a gripping action sufficient to provide (1) a relatively high resistance to frictional sliding movement between the strap and ring in one direction correspond to the direction of untensioning of the belt with the pulley and (2) a relatively low resistance to frictional sliding movement between the strap and ring in an opposite direction corresponding to the direction of belt tensioning. A spring is included in the mount for enabling the relatively high resistance and relatively low resistance to vary in response to the existence of predetermined vibrations such that the gripping action between strap and ring is relieved sufficient to enable movement therebetween in both directions to take place at substantially reduced resistance levels.

Door opening cable system with cable slack take-up

Abstract: A van door slidable in tracks (16, 18 and 20). An operating module is mounted inside the van adjacent center track 18. A front cable attached to drive pulley (144) extends through guide assembly (54) to hinge and roller assemble (26). A rear cable attached to drive pulley (136) extends through guide assembly (56) to hinge and roller assembly (26). The drive pulleys (136 and 144) each have a large diameter spiral cable groove (164), a small diameter cable groove (208) and a transition cable groove (210). A motor rotates the drive pulleys. The small diameter cable grooves drive the door when the door is in the forward portion of the tracks. The large diameter spiral cable grooves drive the door when the door is in the center and rear portions of the track. Fixed idler rollers (226 and 254) are positioned relative to the cable drive pulleys to insure that the total cable in the continuous cable loop is substantially the same when the cable is driven by the small diameter cable grooves as when the cable is driven by the large diameter spiral cable grooves. A cable tension system (220) maintains cable tension. A slack cable take-up pulley (174) on the drive pulley (136) takes up slack cable to set cable tension and is then locked in position.

Influence of Pulley Kinematics on Cable-Driven Parallel Robots

Abstract: In this paper the modeling of a pulley mechanism for cable-driven parallel robots is presented. In many works, the proximal anchor points of the robots are simplified to be ideal points. Real cables achieve reasonable life time only when a minimum bending radius is exceeded. Therefore, pulley mechanisms have to be used which in turn require the extension of the kinematic modeling. In this paper a kinematic model for a pulley mechanism of the winches is revisited. Then we derive a corrected structure equation and compare the different results from the extended model with the estimation from the simplified standard model with respect to kinematics transformation, workspace, and force distribution.