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.

Traction drive, especially for driving internal combustion engine units, has arrangement for demand regulated setting of tension consisting of unit with housing with limited rotation and pulley

Abstract: The device has a traction element connecting all belt pulleys of the units and a tensioning system. One unit is provided with a housing with limited rotation (11), with which at least one direction changing pulley (12,13) driven by the traction element (3) interacts either directly or indirectly to form an arrangement that uses a torque induced by the unit in the operating state to influence the tension in the traction element.

Overrunning isolating decoupler pulleys

Abstract: Embodiments of the present invention provide improved overrunning pulleys that overcome one or more of the deficiencies in the prior art noted above. Embodiments of the present invention provide pulleys that are “springy” in the torque direction, yet have a lower effective spring constant (e.g., are less stiff) over a greater angular range. Further, in at least some embodiments, the inventive pulleys use a low cost and simple torque transfer geometry. Further, in at least some embodiments, the inventive pulleys afford significant overrun. Further, in at least some embodiments, the inventive pulleys are radially small in an overall envelope, in order to allow the alternator to reach its highest possible rotational speed, and thus output, during engine idle. Further, in at least some embodiments, the inventive pulleys are more durable, as they offer the aforementioned dynamics in both directions (torque and counter-torque).

Continuously variable transmission pulley

Abstract: The invention comprises a continuously variable transmission pulley. The pulley comprises at least one axially movable sheave section which is coaxial with a second sheave section. Each sheave section (31, 32, 33, 34) has a series of radial grooves (29, 30) which are axially and radially aligned. The radial grooves are arranged in pairs between each sheave section. The belt blocks (26) span between the sheave sections, each having opposing arcuate ends that slidingly engaging a pair of grooves. The belt blocks are arranged circumferentially about an axial sheave centerline. Each belt block also has a surface for receiving a multi-ribbed belt (20). At least one elastic member (24, 25) encircles the belt blocks so as to control their relative positions, keeping them in contact with the sheave grooves as the pulley rotates. As the movable sheave is moved axially, each belt block moves radially within its respective grooves so as to increase or decrease the effective diameter of the pulley.

Splined shaft and wheel retained thereon by spring and hub element

Abstract: A construction toy including a splined shaft and a wheel element nonrotatably fitting thereon and retained by a spring ring which grips the shaft. A hub element is detachably secured to the wheel, with the spring occupying a recess between wheel and hub elements to limit their movement on the shaft. A. The Problem Small children playing with mechanical toy building sets often have difficulties in securing pinions, pulleys, discs and similar wheel elements on shafts when building vehicles or other mechanical devices. Fastening such wheel elements on the shafts generally requires the use of tools or accessories which are difficult to handle for small children. B. The Solution Two essential features are required for solving this problem, and the invention consists in the combination of these features: A. To provide a shaft having a noncircular cross section and wheel elements having a complementary hole, so as to enable the child to mount the wheels on the shaft by pushing them thereon from one end, thereby fixing the wheels on the shaft so as to prevent relative rotational movement. B. To provide a frictional fit between the shaft and the wheels so that axial displacement can only be effected by overcoming the friction therebetween. To this end a cylindrical recess is provided in the wheel element surrounding the central hole therein and an annular spring is located in the cylindrical recess in such a manner as to exert a radial pressure against the shaft, thereby increasing the frictional resistance against axial displacement of the wheels relatively to the shaft. The functioning of this spring is automatic and requires no skill or attention on the part of the user. C. The shaft may be tapered at one end, so as to facilitate the mounting of the wheels. D. The width of the cylindrical recess or cavity within the wheel is greater than the thickness of the spring to prevent the spring from being jammed within the cylindrical recess. E. The cylindrical cavity or recess is closed so as to totally enclose the annular spring by means of a hub element assembled with the side of the wheel.

Trolley braking system

Abstract: An apparatus for transporting a rider between two points on a cable or rope, having a plurality of supports configured to suspend the cable or rope between two points of unequal elevation and a trolley for transporting the rider supported by a harness on the cable or rope, the trolley having a mounting plate configured with a connection point to receive the rider's harness, a pulley rotatably mounted to the mounting plate to support the plate on the cable or rope, and a friction shoe mounted on the plate forward of the pulley to contact the upper portion of the cable or rope, wherein the connection point is located beneath the cable or rope between the centers of the pulley and the friction shoe.