Abstract: A pressure relief valve for a hydraulic system for controlling a belt-driven conical-pulley transmission. The valve includes an orifice having an opening to admit a stream of a hydraulic medium, and a valve cone to block the opening in the orifice. A spring is carried by the valve cone to apply a restoring force to press the valve cone against the orifice in sealing contact with the opening. A hydraulic plate having a valve bore is provided to receive and guide the valve cone and the spring. A lateral force support is carried by the valve cone to align the axis of the valve cone relative to the axis of the orifice opening.

Abstract: A tensioner includes a base, a tension arrangement rotatable at the base, a damping member being rotated in a loading direction by the tension arrangement, and an elastic member biasing against the damping member. The position of the damping member depends by the layout geometry of the specific application and is directly in opposition to the hub load. The reaction force of the cylindrical surface of the base on the damping member is very near to the plan of the external forces represented by the hub load to minimize the deflection of the shaft. The tension arrangement is rotated to push the damping member for generating a first positive tension between the damping member and the base, and to expand the elastic member radially for generating a second positive tension between the elastic member and the damping member, so as to enhance a damping force of the tensioner.

Abstract: A key pulley segment in a synchronized, segmentally interchanging pulley transmission system is either first or last in a pulley segment set to engage an endless member. The first or last key segment teeth to engage or disengage, respectively, are shortened or completely trimmed, and the adjacent pulley segment to the key segment is elongated such that the inward portion of the tooth profile extends toward the key segment. Shortened tooth or teeth and an elongated adjacent segment together allow for many pulley segments to be designed as key segments. Completely trimmed teeth may be engineered to create a supporting surface for the endless member on the key segment. The elongated adjacent segment may have an extending portion which slidably mates with the supporting surface of the key segment, thereby receiving radial support therefrom.

Abstract: A lubrication pinion module for applying a lubricant onto a to-be-lubricated element includes a gear element having an inner surface mounted on an outer surface of a bearing element, the bearing element being mountable for rotation on a shaft and having at least one recess on its outer surface, and the gear element including a plurality of radially outwardly facing gear teeth, each of the plurality of gear teeth having first and second flanks, and at least one projection on the gear element inner surface extending into the at least one recess of the bearing element outer surface to form an interference fit with the bearing element such that the gear element rotates conjointly with the bearing element.

Abstract: Control system for a continuously variable transmission with a first and a second pair of conical sheaves each with adjustable running radius, in which of each pair at least one sheave (14a, 14b) is coupled to a first and a second hydraulic actuator (20a, 20b) respectively which sets the axial sheave position in dependence of the amount of hydraulic medium supplied thereto, in which the actuators are connected with means to supply and discharge thereto/therefrom respectively, hydraulic medium, and one actuator is connected to a source of hydraulic pressure medium, and in which furthermore the first and second actuator respectively is connected with a first and second control chamber (60, 124) respectively, filled with hydraulic medium and having a variable control volume, in such a way that an increase of the first control volume is coupled to a decrease of the second control volume, and vice versa.

Abstract: An electric bicycle derailleur control system is basically provided with a derailleur, a detecting device and a controller. The derailleur includes a chain guide and an electrical actuator. The chain guide is configured to displace a bicycle chain. The electrical actuator is operatively coupled to the chain guide to displace the chain guide. The detecting device is configured to detect information related to a reaction force of the bicycle chain. The controller is configured to control the electrical actuator in accordance with detected information.

Abstract: A pulley device comprising a rolling bearing including an inner ring defining a central bore, and outer ring and rolling elements mounted between the inner ring and the outer ring, a pulley secured in rotation with the outer ring and provided with a feature for engaging with a transmission member. The pulley additionally includes a screw comprising a head and a shank housed in the central bore of the inner ring, the screw being configured to fix the pulley device to a motor support. The pulley device also comprises a first sleeve arranged between the inner ring and the screw, on the side of the motor support. The first sleeve includes an inner surface that has a frustoconical portion having an increasing diameter toward the head of the screw.

Abstract: A housing structure includes first and second housings and first and second rotation transmitting members. The first and second housings house a shaft. The first rotation transmitting member is provided coaxially with the shaft. The second rotation transmitting member is arranged so as to transmit power to the first rotation transmitting member. The first and second housings are combined with each other so that mating surfaces of the first and second housings that are unparallel to an axis of the shaft are contacted. The first housing includes a first guide portion that protrudes from the mating surface of the first housing. The second housing includes a second guide portion that engages with the first guide portion. The first and second guide portions are engaged with each other along a circumferential direction of the axis and guide relative rotation of the first housing and the second housing around the axis.

Abstract: A laminated sprocket assembly is provided formed of a plurality of layers that are connected together. Each of the layers is a stamped sheet metal layer having a plurality of spaced apart teeth located around a periphery thereof. The teeth in the plurality of connected layers are aligned. At least one of voids, channels, openings, or recesses are located in or between at least some of the layers for receiving and holding lubricating oil. This reduces noise and wear.

Abstract: Aspects of the disclosure are directed to a shaft of an engine of an aircraft, an oil scoop coupled to the shaft, a first portion of a sensor integrated with the oil scoop, and a second portion of the sensor coupled to a structure of the engine. In some embodiments, the first portion of the sensor comprises at least one tooth.

Abstract: A belt type continuously variable transmission device includes an actuator that moves a moveable sheave member of a drive pulley which is a one-side pulley in an axial direction. The actuator includes a moveable feed member, a gear case, and an electric motor. The moveable feed member includes an inner tube section in which a moveable-side feed screw is provided, an outer tube section in which an outer gear is provided, and a lid section. The gear case has a fixed tube section in which a fixed-side feed screw is provided, and an outer cover. The electric motor drives a motor-side gear that intermeshes with the outer gear. The outer cover has an opening into which the outer tube section is inserted and that proximately opposes an outer circumferential surface of the outer tube section.

Abstract: An isolating decoupler comprising a shaft, a pulley having a belt bearing portion, a one way clutch, a torsion spring, the torsion spring engaged between the pulley and the one-way clutch, and a single bearing disposed between the shaft and the pulley, the bearing comprising a radial centerline, the radial centerline aligned with a mid-line of the belt bearing portion.

Abstract: A bicycle transmission apparatus comprises a base member, a first transmission member, a second transmission member, and a first coupling member. The first transmission member is rotatable relative to the base member about a first rotational axis and is movable relative to the base member in an axial direction parallel to the first rotational axis. The second transmission member is rotatable relative to the base member about a second rotational axis and is stationary relative to the base member in the axial direction. The first coupling member is configured to couple the first transmission member to the second transmission member to transmit rotation of the first transmission member to the second transmission member at a variable speed stage which is variable in accordance with at least one positional relationship among the first transmission member, the second transmission member, and the first coupling member in the axial direction.

Abstract: V-ribbed belts with spaced rib flank reinforcement and methods of making the same are disclosed. The V-ribbed belt comprises a compression section having at least one laterally spaced, longitudinally extending V-rib having first and second longitudinally extending flanks. The V-rib includes an elastomeric material having a dry coefficient of friction encapsulating a plurality of reinforcing bodies having a dry coefficient of friction that is less than that of the elastomeric material. The plurality of reinforcing bodies are arranged generally laterally within the V-rib such that at least a portion of the reinforcing bodies forms part of one or more of the first and second longitudinally extending flanks.

Abstract: A device for noise vibration reduction of an alternator's pulley includes a pulley part combined with a rotating shaft of the alternator and also has a pendulum damper adapter part inserted into the pulley. In particular, the pendulum damper adapter part includes a pendulum pamper part and rotate or reciprocate the pendulum damper part to generate a vibration having the same frequency as but an opposite phase to a vibration of the pulley part so as to reduce the vibration of the pulley part.

Abstract: The present patent application discloses an overrunning alternator damping pulley. The overrunning alternator damping pulley includes a pulley body, two ball bearings provided on both ends of a shaft hole of the pulley body; and a hub for supporting the two ball bearings. At least one spring holder is provided on the hub. At least one friction spring is installed on the spring holder. One end of the friction spring is inserted to the spring holder. Another end of the friction spring forms a free end spirally extending along an axial direction of the hub. The outer ring of the friction spring is in contact with an inner wall of the pulley body. A damping groove corresponding to the friction spring is provided on the inner wall of the pulley body.

Abstract: A tensioning device comprising a receiver housing, a lever arm mounted on the receiver housing and rotatable with respect to the receiver housing around a first rotation axis, a pulley mounted on the lever arm and rotatable with respect to the lever arm around a second rotation axis parallel to the first rotation axis, and a spring mounted between the receiver housing and the lever arm and adapted to apply a torque for rotating the lever arm around the first rotation axis. The receiver housing and the lever arm are screwed together around the first rotation axis. The spring applies an axial damping effort, parallel to the first axis, on cooperating threaded portions respectively provided on the receiver housing and on the lever arm.

Abstract: A belt-driven continuously variable transmission adapted to prevent an occurrence of belt slippage is provided. The continuously variable transmission comprises a hydraulic actuator formed on a back side of a movable sheave to change a belt groove between a fixed sheave and a movable sheave, and a torque cam assembly adapted to convert a torque into an axial thrust force by a relative rotation between a pair of cam members contacted to each other. In the belt-driven continuously variable transmission, a piston fitted onto a shaft of the driven pulley while allowing to rotate relatively therewith and to reciprocate thereon is integrated with one of the cam members of driven side and with an output gear for outputting torque of the pulley. The cam member of drive side is fixed in an axial direction on a driven shaft to be rotated integrally therewith.

Abstract: To provide a chain guide that implements stable running of a chain, causes less wear or damage on the inner surface of mounting holes or on mounting shafts, and improves the durability of a reinforcing plate thereof without increasing production cost. A guide shoe includes a guide rail and a plate holding part accommodating a reinforcing plate inserted thereinto from the backside of the guide rail. The reinforcing plate includes a tubular part integral with a first plate surface and protruding from the edge of a mounting hole that extends through the reinforcing plate in a guide width direction. In the chain guide, a plurality of surface irregular parts are provided on a peripheral outer side of the tubular part in stripes along a plurality of imaginary circles concentric to the tubular part on at least one of the first plate surface and a second plate surface.

Abstract: A system includes a continuously variable transmission having a primary pulley assembly configured to receive power and a primary oil chamber coupled to the primary pulley assembly such that a pressure of oil within the primary oil chamber is applied to the primary pulley assembly. The continuously variable transmission also includes a secondary pulley assembly and a drive belt configured to transfer power from the primary pulley assembly to the secondary pulley assembly. The system also includes a pressure sensor coupled to the primary oil chamber and configured to detect a pressure of the oil within the primary oil chamber. The system also includes an electronic control unit coupled to the pressure sensor and configured to determine whether the continuously variable transmission is set to the maximum gear ratio based on the detected pressure of the oil within the primary oil chamber.