One aspect of the present disclosure provides a strain wave gear device including an internal gear, an external gear and a wave generator. The wave generator has a cam and a fourth bearing. The cam has a non-circular outer peripheral surface, and the fourth bearing is positioned between the inner peripheral surface of the external gear and the outer peripheral surface of the cam. The fourth bearing has an outer ring, an inner ring, a plurality of balls, and a retainer. The strain wave gear device includes a restricting portion provided such that the restricting portion can avoid touching the retainer. The restricting portion can restrict the fourth bearing from moving in the direction extending along the axis of rotation.

A method for producing a spray channel on a shaft tube, whereby a completed shaft tube can output fluid from within the shaft tube to outside of the shaft tube, the method may include introducing at least one through-opening with a diameter D.sub.1≥1.5 mm into the shaft tube and arranging at least one additional element in or on the at least one through-opening such that the spray channel is at least partly formed by the at least one additional element.

A device for forming circumferential grooves in pipe elements uses multiple geared cam bodies mounted on a carriage which rotates about a fixed pinion. The gears engage with the pinion which causes the geared cam bodies to rotate relative to the carriage. Traction surfaces and cam surfaces on the cam bodies traverse the outer surface of the pipe element and impress a circumferential groove therein. To substantially prevent rotation of the pipe element the pitch circle diameter of the pinion equals the outer diameter of the pipe element and the pitch circle diameters of the traction surfaces equal the pitch circle diameters of the gears.

A buffered cam assembly, which is particularly well-suited for use to provide a clock input for a mechanical computing system, interposes a buffer element between a cam surface and a follower. The buffer element engages the cam surface and acts to significantly reduce the effect of any irregularities in the cam surface on the resulting motion of the follower, allowing the output waveform of movement of the follower to more closely approximate an intended ideal output waveform.

One aspect of the present invention provides a method for manufacturing a strain wave gear device. The method includes steps of measuring a between pin diameter of an internal gear, measuring an over pin diameter of an external gear, where the external gear is to be placed radially inside the internal gear, configured to mesh with the internal gear, and flexible, measuring a dimension of a bearing, where the bearing is to be placed radially inside the external gear, and flexible, and machining an elliptical cam, where the elliptical cam is to be placed radially inside the bearing, and configured to flex the external gear in a non-circular manner. The elliptical cam is machined based on the measured dimensions of the internal gear, external gear and bearing such that the internal and external gears mesh with each other at a constant position.

A lift truck employs forward and reverse pedals connected through respective cams having different upper and lower cam profiles that engage to provide asymmetric reciprocal pedal motion. For example, first pedal depression causes a first cam upper profile to engage with a second cam upper profile and cause increased elevation of a second pedal, and first pedal depression causes a first cam lower profile to disengage with a second cam lower profile associated with the second pedal, such that first pedal depression is greater than the increased elevation of the second pedal.

A method for producing a constructed camshaft of an internal combustion engine may be used in connection with a camshaft having a cam, a shaft, and an anti-friction bearing. The method may involve machining the cam, machining the shaft to produce a setting region for arranging the cam, heating the cam and the anti-friction bearing, pushing the cam onto the shaft into a preliminary position and pushing the anti-friction bearing onto the shaft into a bearing position, equalizing a temperature between the shaft, the cam, and the anti-friction bearing by cooling at least the cam, and setting the cam onto an end position by way of pushing the cam onto the setting region.

The present disclosure relates to a gear box mechanism with a carrier for housing a plurality of gear blocks, a retainer cam, a cam shaft, and a plurality of cam followers. The gear blocks can interact with a ring gear allowing an output to be driven. The carrier can be housed within a first lid, and a second lid. The plurality of gear blocks can be driven by the cam shaft that has a plurality of cam pathways along an outer circumferential surface of the cam shaft. Additionally, the retainer cam has a retention pathway along an inner surface of the retainer cam. One or more of the plurality of cam followers engage with the cam pathways and the retention pathway, allowing the plurality of gear blocks to be actuated based on the position of the plurality of cam followers along the retention pathway and the cam pathways.

A device for positioning a shaft relative to a functional element including at least one hub for the shaft. The device may include a tailstock for axially aligning the shaft with respect to the at least one hub of the functional element. The tailstock may include a radially adjustable centring cone for the shaft. The tailstock may have an outer diameter that is smaller than an inner diameter of the at least one hub.

A hybrid engine having a plurality of combustion power assemblies disposed about an engine driveshaft on which is mounted spaced apart cams, each combustion power assembly disposed between the cams radially outward of the driveshaft and having a combustion cylinder with a fuel injector mounted thereon and with a reciprocating piston assembly disposed in each end of the combustion cylinder. A cam follower is attached to each piston assembly and engages a respective cam. An electric power assembly may be mounted radially outward from the driveshaft and adjacent at least one cam as a radial power assembly or may be mounted along the driveshaft between the two cams as an axial power assembly.