Abstract: A minimum grip drive sprocket. A sprocket having a knurled chain engagement surface rotably engages a drive chain typically in an environment exposed to a slick or lubricating medium allowing an acceptable degree of drive chain slip while maintaining rotation of the minimum grip drive socket.

Abstract: There is a demand for further improving efficiency of a task of replacing the reduction gear of the robot. A jig configured to support a reduction gear connecting a first element and a second element of a robot to be enabled to perform a speed reduction operation on each other, when the second element is separated from the first element includes a fixed portion removably mounted to the first element or the second element, a movable portion rotationally or translationally movably mounted to the fixed portion, and a support mounted to the movable portion and configured to suspend and support the reduction gear in a gravity direction.

Abstract: An electric bicycle includes a frame assembly, wheels supporting the frame assembly, a motor assembly coupled to the frame assembly and having a motor output shaft, and a chainring assembly including a mounting portion clamped onto the motor output shaft.

Abstract: It is described a compound planetary friction drive comprising a first sun wheel (2) and planetary wheels (3), wherein said first sun wheel (2) engages said planetary wheels (3), which planetary wheels (3) are arranged with two outer parts (3b) having a first radius (r1) and a central part (3a) having a second radius (r2), wherein the second radius (r2) differs from the first radius (r1) and transition regions (3c) are provided between the outer parts (3b) and the central part (3a), and wherein an outer ring annulus (1) and a central ring annulus (5) are provided that are in driving engagement with the planetary wheels (3), wherein the outer ring annulus (1) has two parts between which, along the length of the planetary wheels (3), the central ring annulus (5) is disposed, wherein the first sun wheel (2) is in frictional engagement with the outer parts (3b) of the planetary wheels (3), said outer parts (3b) of the planetary wheels (3) are in frictional engagement with the parts of the outer ring annulus (1) a

Abstract: A method for forming welded assembly. The method includes: providing a gear workpiece; forming a joining section on the gear workpiece that defines a weld interface; applying a material to the outside surface of the gear workpiece including the joining section; cutting a plurality of teeth in the material-covered gear workpiece, each of the plurality of teeth having first and second flanks and a root, wherein the material does not reside on any one of the first flanks, the second flanks and the roots; heat treating the gear workpiece to harden the teeth; and finishing the heat-treated gear workpiece in a finishing process to form a finished ring gear, the finishing process comprising at least one of a turning operation and a lapping operation; wherein the material is disposed over the weld interface on the finished ring gear. A welded assembly is also provided.

Abstract: A method for producing a ring with a toothing may involve (a) ring rolling a pre-ring to form a ring blank, (b) introducing a pre-toothing into the ring blank to form a pre-toothed ring, wherein the pre-toothing has teeth with a first tooth height, (c) heating, quenching, and tempering the pre-toothed ring to form a heat-treated pre-toothed ring, and (d) finish-toothing the heat-treated pre-toothed ring to form a ring with a toothing. The toothing may have teeth with a second tooth height that is greater than the first tooth height. Further, the introducing of the pre-toothing or the finish-toothing of the heat-treated pre-toothed ring may be performed by way of a metal machining process.

Abstract: A planetary drive includes a planet carrier and planetary gears. The carrier includes two axially-facing carrier plates and at least one connecting element. The connecting element is a linear strip of metal that is bent to take the shape of a cylinder for assembly. The strip of metal connects the two carrier plates while maintaining them in a spaced apart relationship. The strip includes a plurality of openings or holes for receiving a part of the planetary gears as they rotate. The strip is a separate element from the carrier plates, but is assembled to and between the plates.

Abstract: In a support structure for a rotating member, in which a support body supporting a rotating member so as to be rotatable around a predetermined axis is provided with a spherical support face that is recessed toward a side opposite to the rotating member, and a back face of the rotating member is rotatably and slidably supported on the support face, the back face of the rotating member is formed as a convexly curved face that is curved so that portions on opposite sides of the axis each protrude toward the support face when viewed in a cross section containing an entirety of the axis. In order for the back face to be supported on the support face via an apex portion of the convexly curved face, a radius of curvature of at least the apex portion is set smaller than a radius of curvature of the support face.

Abstract: An atherectomy device with an exchangeable drive shaft is disclosed, having a drive shaft gear at a distal end of the exchangeable drive shaft for meshing engagement with a prime mover gear on the output shaft of the prime mover. The exchangeable drive shaft is inserted into an opening at the distal end of the handle housing and moved axially in a proximal direction. Surface features on at least the prime mover housing and the engageable drive shaft help to align the drive shaft gear with the prime mover gear for meshing engagement.

Abstract: Timepiece collet comprising a point of attachment to a balance spring and a passage intended to receive a balance staff. According to the invention, the passage is substantially cylindrical and is configured to deform elastically in a plane perpendicular to the axis of the passage and to elastically clamp the balance staff by at least two lines of contact extending over the height of the inner wall of the passage when the balance staff is inserted in the passage.

Abstract: An assembly of a member, made of a first material in an aperture of a part, made of a second material having no plastic domain, using an intermediate part made of a third material, mounted between the member and the part. The intermediate part includes a hole for receiving the member. The part includes pierced holes forming a deformation mechanism distributed around the aperture thereof. The elastically and plastically deformed intermediate part radially grips the member and stresses the elastic deformation mechanism of the part so as to secure the assembly in a manner that is not destructive for the part. Such an assembly can for example be used in the field of timepieces.

Abstract: Embodiments include a modular flex plate assembly with a plurality of modular segments connectable with at least another modular segment by joining a first end of one modular segment to a second end of another modular segment to form a ring gear. The ring gear can be mounted to a substrate and mounted or fastened to a component of an engine or a transmission system. A plurality of securing devices can cooperatively engage the ring gear to a substrate, such that the gear teeth of the ring gear align with the perimeter edge of the substrate.

Abstract: A torque transmission and sealing assembly includes a ring gear having a first axial end, a second axial end opposite the first axial end, an inner surface including a plurality of teeth and an axial-facing surface at the first axial end, a barrel portion joined to the second axial end of the ring gear, and a plurality of annular, axial extending fingers integrally formed with the ring gear and extending from the axial-facing surface.

Abstract: A wheel spindle drive element for a wheel disconnect system. The wheel spindle assembling onto an outer diameter of a spindle, displacing material to form a joint with high torque transmission characteristics.

Abstract: A method of making a bevel gear system. The method may include selecting a member of the first set of side gears and a member of the second set of side gears corresponding to a desired gear ratio. The selected first side gear may have a different number of teeth than a selected second side gear.

Abstract: A differential includes a pinion shaft holder, a differential case, a first side gear, a second side gear, a first spring and a second spring. The differential case includes a first side boss portion and a second side boss portion. The first spring is interposed between the first side boss portion and the first side gear. The second spring is interposed between the second side boss portion and the second side gear. A recessed portion is provided on the pinion shaft holder and is configured to avoid interference with an auxiliary tool. The auxiliary tool maintains one of the first spring and the second spring in the compressed state.

Abstract: A novel method of manufacturing a toothed disc is taught wherein the teeth can be cold formed to a relatively high set of tolerances in a relatively time-efficient manner. A cold-formed disc blank with an annular thickened ring about its periphery is forced through a set of tooth forming rollers which engage the annular thickened ring. As the blank is forced through the set of rollers, the rollers cold forming tooth structures in the annular ring. In some circumstances, the tooth structure can be a final desired tooth profile and in other circumstances, the disc blank may be forced through two or more different sets of tooth forming rollers, each set of tooth forming rollers contributing to the forming of the final, desired tooth profile.

Abstract: A differential case assembly, which has a case shoulder and a case outside diameter, is attached to a drive ring gear, which has a gear shoulder and a gear inside diameter. Attachment of the differential case assembly to the drive ring gear is by way of pressing the case outside diameter into intimate contact with the drive ring gear inside diameter around the circumference of the diameters, until the case shoulder comes into intimate mating contact with the gear shoulder, at a joint radius. In addition, hardened dowel pins are tightly fit into joint voids that are formed along the joint radius. The hardened dowel pins are capable of supporting an operational torsional load and the mating shoulders are capable of supporting an operational axial load.

Abstract: In this manufacturing method, when a plurality of planetary shaft main bodies are arranged at even intervals around a sun shaft main body, a state in which a sun threaded section is engaged with each of planetary threaded sections is referred to as a regular assembled state, and an assembly formed by a combination of the sun shaft main body and the planetary shaft main body in the regular assembled state is referred to as a first assembly. The first assembly is assembled in a state in which the relationship of the planetary shaft main body and the sun shaft main body is in correspondence with the relationship of the planetary shaft main body and the sun shaft main body in the regular assembled state.

Abstract: An annular caulking-fastened component to be fastened to a counterpart component by caulking includes a notch formed in an inner peripheral edge portion at one end side in a center axis direction, the notch being to be fixed to the counterpart component by caulking; and at least one of an inner-peripheral stepped portion formed between an inner peripheral surface and the inner peripheral edge portion and outward from the inner peripheral surface in a radial direction and an end-face stepped portion formed between an end face at one end side in the center axis direction and the inner peripheral edge portion and from the end face toward the other end side in the center axis direction.

Abstract: The invention relates to devices including rotary units and rotary mechanisms that are suitable for use in numerous applications. Rotary units typically include rotational components that are configured to rotate. In some embodiments, for example, multiple rotary units are assembled in rotary mechanisms such that neighboring pairs of rotational components counter-rotate or contra-rotate relative to one another during operation of the rotary mechanisms. Rotational components generally include one or more implements that are structured to perform or effect one or more types of work as the rotational components rotate relative to one another in a given rotary mechanism. In certain embodiments, implements are configured to rotate and/or to effect the movement of other components as rotational components rotate.

Abstract: Disclosed are various embodiments for rail gear that may facilitate a vehicle traversing on the rails of a railway. The rail gear may comprise a first rail guidewheel and a second rail guidewheel in rotatable connection with an axle. The rail gear may also comprise a first mount that is restricted from rotating with respect to the axle and a second mount that is configured to rotate with respect to the axle.

Abstract: Provided is a winch apparatus including two exchangeable and interchangeable gears connecting a motor to a drum, the drum being operative to extend and retract a flexible line.

Abstract: Three methods of fabricating an intermediate, center or combination gear for a stacked planetary gear assembly are presented. A first method comprehends forming male splines on the outer surface of the inner (ring) gear and female splines on the inner surface of the outer (sun) gear. The gears are then heat treated and assembled. A second method comprehends broaching internal splines in the outer (sun) gear as well as end milling, broaching or polygon turning face splines on one end of the outer gear and an opposing, adjacent end of the inner (ring) gear. A third method includes fabricating and heat treating the inner and outer gears. A small area of the hardened case is then removed by, for example, machining. The gears are mated, heated rapidly by a pulse of electric current and upset in the heated region.

Abstract: A method is disclosed for assembly of a planetary gear drive, wherein the gear drive includes a ring gear, a sun gear, and a plurality of planet gears engaged with the ring gear and sun gear. The method includes mounting the planet gears within a carrier, with the planet gears freely rotatable relative to the carrier. A gear alignment tool is inserted through a bore in a front face of the carrier and is used to index the planet gears into an aligned rotational position for proper subsequent engagement with the ring gear and sun gear.

Abstract: A gas turbine engine has a fan and a turbine section including a turbine rotor to drive the fan through a gear reduction module. An input shaft downstream of the turbine rotor includes a flexible mount driving the gear reduction. The input shaft is mounted within a bearing module. The gear reduction module has static structure mounted to an engine housing through a flexible mount. Oil is supplied into the gear reduction. An oil tube supplies oil from the gear reduction to the bearing module, and is received within openings in the static structure, and a housing for the bearing module. The oil tube extends through an assembly guide having a guide opening spaced away from an outer periphery of the oil tube. The guide opening is intermediate the openings. A method is also disclosed.

Abstract: A differential device has a differential case that houses a gear group, and a ring gear that is disposed fitted to the differential case. The differential case and the ring gear are supported rotatably about a drive shaft. The ring gear is made up of a helical gear. The ring gear abuts the differential case in the axial direction of the drive shaft. The ring gear and the differential case are welded at an abutting portion of the ring gear and the differential case in the axial direction of the drive shaft.

Abstract: A locking plate for use in an air turbine starter has a lock plate body including an oil slinger extending away from a base. The base is positioned on an outer peripheral surface of a clutch frame. The slinger extends away from the base for a distance, and a ratio of the distance to a thickness of the base is ten and thirty. A clutch and air turbine starter, and a method of assembly are also disclosed.

Abstract: A differential case assembly, which has a case shoulder and a case outside diameter, is attached to a drive ring gear, which has a gear shoulder and a gear inside diameter. Attachment of the differential case assembly to the drive ring gear is by way of pressing the case outside diameter into intimate contact with the drive ring gear inside diameter around the circumference of the diameters, until the case shoulder comes into intimate mating contact with the gear shoulder, at a joint radius. In addition, hardened dowel pins are tightly fit into joint voids that are formed along the joint radius. The hardened dowel pins are capable of supporting an operational torsional load and the mating shoulders are capable of supporting an operational axial load.

Abstract: The present invention relates to a method for manufacturing a shaft-hub component (1) having a shaft (2), a hub component (3; 10; 11; 12) and a shaft-hub connection for an armature of an electrical machine, comprising the steps: hardening of the shaft (2) at least on the outer lateral surface (6) of said shaft (2), shaping of the hardened shaft (2) such that a partial region (L1; L2; L3; L4) of said shaft (2) is shaped in such a manner that at least one radially projecting section (4) and one radially indented section (5) are produced and joining of said shaped shaft (2) and the hub component (3, 10, 11, 12) to the shaft-hub component so that said shaft-hub connection includes an interference fit at the projecting section (4), a hardness of said hub component (3; 10; 11; 12) being less than a surface layer hardness of said shaft (2). The invention further relates to a shaft-hub component for an armature of an electrical machine.

Abstract: A method of assembling an outboard engine is disclosed. The outboard engine has first and second driveshafts, each having a helical gear on a first end and a driving gear on a second end. A driven shaft has a driven gear. The method comprises: rotating the driven shaft; measuring an axial displacement of one of the first and second helical gears with respect to the engine casing; selecting a shim based at least in part on the measurement of the relative axial displacement; and placing the shim on the one of the first and second driveshafts at a position axially below the helical gear. A method of assembling a marine outboard engine comprising moving a height adjustment member from a first position to a second position based on the relative axial displacement is also disclosed. An outboard engine with first and second helical gears at different heights is also disclosed.

Abstract: A method of producing a composite body, such as a gear wheel or torsional vibration damper, including a radially inner hub body provided with outer profiles, a surrounding outer body provided with inner profiles, and an intermediate layer of synthetic resin material which connects the outer profiles of the hub body with the inner profiles of the outer body; the hub body being with an inner contour adapted to mount the composite body on a shaft.

Abstract: This invention addresses the problem of providing a press-fit structure and a press-fit method capable of improving the durability of a gear which press-fits into a ring part. As such, the embodiment of this invention is that, while one end side in the central axis direction of the ring gear abuts against a protrusion formed protruding on the outer side of the radial direction of the ring part from the outer circumferential surface of the ring of the ring part, and wherein the press-fit structure press-fits the inner circumferential surface of the gear into the outer circumferential surface of the ring part, when the inner circumferential surface of the gear is press-fitted into the outer circumferential surface of the ring part, there is a tensile strength reduction mechanism reducing the tensile strength generated in the lower portion of the gear teeth in at least the position of the aforementioned end side of the gear.

Abstract: A torque transmitting assembly is provided. The torque transmitting assembly includes a generally cup shaped outer shell having a closed end and an open end. The closed end has at least one raised portion formed therein. The outer shell includes an outwardly extending lip surrounding the open end of the outer shell. The open end of the outer shell is adapted to be operatively engaged with a first rotating member. A generally disk shaped inner member has a central aperture and a central axis. The inner member includes at least one tab extending axially outwardly therefrom and engages the raised portion of the outer shell to facilitate a transfer of rotation between the outer shell and the inner member. The central aperture is adapted to be operatively engaged with a second rotating member. The inner member is received inside said outer shell.

Abstract: A method of assembling a planetary gearset includes die-forming plurality of circumferentially spaced apart teeth on a sun gear, a planet gear an a ring gear. Each tooth includes a pair of tooth flanks in a final net form for engagement with mating gear teeth. The sun gear teeth have a conical shape to allow a first die to linearly move relative to a second die after the gear teeth are die-formed. The planet gears are mounted on a carrier. The sun gear and the planet gear are oriented such that the conical shapes of the respective gear teeth taper in opposite directions from one another and the planet gear teeth meshingly engage with both the ring gear teeth and the sun gear teeth.

Abstract: A method of torque adjustment by removing and replacing a spur gear secured to a clutch driver plate in a slipper clutch for a model vehicle without changing the axial load applied by a spring to the clutch driver plate. The spring is configured to apply an axial load to at least a portion of the clutch driver plate in the axial direction of the transmission input shaft, the spring being adjustable to vary the axial load.

Abstract: A differential mechanism includes a case including first and second portions, the first portion including a first surface interrupted by recesses, the second portion including a second surface interrupted by second recesses, contacting the first surface, and secured to the first portion, a pin extending though the recesses, and a ring gear secured to the portions and overlapping the surfaces and the pin.

Abstract: A differential includes a pinion shaft holder, a differential case, a first side gear, a second side gear, a first spring and a second spring. The differential case includes a first side boss portion and a second side boss portion. The first spring is interposed between the first side boss portion and the first side gear. The second spring is interposed between the second side boss portion and the second side gear. A recessed portion is provided on the pinion shaft holder and is configured to avoid interference with an auxiliary tool. The auxiliary tool maintains one of the first spring and the second spring in the compressed state.

Abstract: A method of mounting a first drum and a second drum of a double-drum sequential gear control device for a motor-vehicle gearbox in a predefined relative angular position, wherein in a mounted condition the first drum and the second drum are rotatably arranged about respective rotation axes parallel to but not coincident with each other, includes forming a first positioning hole in a first position of the first drum, forming a second positioning hole in a second position of the second drum, arranging the first drum and the second drum in the predefined relative angular position, locking the first drum and the second drum in the predefined relative angular position by engaging the first positioning hole and the second positioning hole with a locking device, and unlocking the first drum and the second drum once mounting of the gear control device is completed.

Abstract: The invention relates to a device for assembling, by screwing, a drive member, such as a drive pulley, with a shaft intended to be coupled to the rotor of a rotating electrical machine, the device including an additional, welded connection. According to the invention, this method of producing the assembly device is characterized in that the drive member screwed onto its shaft in the vertical position is welded from below. The invention can be used for rotating electrical machines, such as an alternator or a starter-alternator of a motor vehicle.

Abstract: A hypoid gear set for a vehicle drivetrain includes a pinion gear in meshing engagement with a ring gear. The hypoid gear set has a negative pinion offset. The hypoid pinion and ring gears provide a predetermined gear ratio that can be varied up to a fifty percent faster ratio within a single carrier packaging envelope defined by a maximum ring gear diameter.

Abstract: A differential gear casing of flower pot construction has an outer surface which is configured for receiving a crown wheel, whereby the crown wheel can be pressed onto the outer surface by different amounts for different applications. The outer surface is free from projections such that the crown wheel can be mounted on the outer surface from any axial direction. The outer surface defines a band on the differential gear casing and is parallel with a central axis of the differential gear casing. The crown wheel is secured to the differential gear casing using an axial weld line. In other embodiments, the crown wheel and/or a cover for the differential gear casing are secured in place using axial and/or radial weld lines.

Abstract: A method for manufacturing a carrier assembly of a stacked planetary gear set is provided. The method includes forming the inner and outer spiders and attaching the spiders to a back plate or to each other to form the carrier assembly. One or both of the inner and outer carrier spiders are formed from powdered metal, by precision casting, and/or by stamping. The stacked planetary gear set may be axially aligned or axially offset.

Abstract: A method of assembling an outboard engine is disclosed. The outboard engine has first and second driveshafts, each having a helical gear on a first end and a driving gear on a second end. A driven shaft has a driven gear. The method comprises: rotating the driven shaft; measuring an axial displacement of one of the first and second helical gears with respect to the engine casing; selecting a shim based at least in part on the measurement of the relative axial displacement; and placing the shim on the one of the first and second driveshafts at a position axially below the helical gear. A method of assembling a marine outboard engine comprising moving a height adjustment member from a first position to a second position based on the relative axial displacement is also disclosed. An outboard engine with first and second helical gears at different heights is also disclosed.

Abstract: The invention relates to an arrangement comprising a gear and a coupling element, which is connected to the gear in a form-fitted manner in order to transmit a rotational motion. The gear and the coupling element each have a geometry (e.g., GZ, GK) on end faces facing each other, which form a form-fitted connection in connection with the geometry of the other element. The gear and the coupling element are designed as components produced by sintering, into which the respective end-face geometries (GZ, GK) are impressed. Using these end-face geometries, the gear and the coupling element are positioned relative to each other.

Abstract: A face gear set having a face gear and an original pinion. The original pinion may mesh with the face gear. The face gear set may have a new pinion, different from the original pinion, which meshes with the face gear in accordance with at least one design parameter different from a corresponding design parameter of the original pinion. The new pinion may have a tooth surface defined by a theoretical plane. The tooth surface of the new pinion may maintain tangency contact with the original pinion during rotation and translation of the plane over a meshing area of the original pinion with the face gear, and also during rotation of each of the face gear, the original pinion and the new pinion at constant speed about the new pinion's axis of rotation.

Abstract: The part is made from a plate (1) made of a brittle material, such as glass, quartz or silicon and includes at least one aperture (2, 4, 6) for driving in a shaft (5). This aperture is characterized in that it includes alternately rigidifying and positioning zones (8) and resilient deformation zones (10). Application to securing a shaft onto the moving parts of a timepiece movement.

Abstract: An internal gear and cap assembly includes a gear having a base that extends about an axis between a first and second end. The first end defines a groove that extends to a floor and the groove surrounds the axis. Teeth extend from the base. A lip extends from the first end and also surrounds the axis. A cap has a flange that is inserted into the groove. The lip is deformed toward the groove such that material from the lip flows to trap the flange between the lip and the floor of the groove to retain the cap to the gear in the axial direction. Slots may be defined in the flange such that the material from the lip flows into the slots to provide a key-lock between the cap and the gear to prevent rotation of the cap relative to the gear about the axis.

Abstract: A method of assembling a differential gear set includes installing a first bushing into a carrier, installing a second bushing into the carrier, and inserting a first planet gear into an interior portion of the carrier. The first planet gear includes a first planet gear shaft. A second planet gear including a second planet gear shaft is inserted into the interior portion of the carrier. The first and second planet gear shafts are installed into the first and second bushings. A third planet gear including a third planet gear shaft is inserted into the interior portion of the carrier and a fourth plant gear including a fourth planet gear shaft is inserted into the interior portion of the housing. The third and fourth planet gear shafts are passed into corresponding bushing receptors in the carrier. Third and fourth bushings are installed on the third and fourth planet gear shafts.

Abstract: The gear housing may be a housing to enclose a gear assembly of a land mobile vehicle. The gear housing may have an upper housing portion and a lower housing portion. The lower housing portion may have a wall reference position below a lowest surface structure of a gear assembly wherein a wall of smooth, generally non-planar surfaces may be positioned below a gear assembly centerline with an interior surface at the wall reference position adjacent the lowest surface structure with sufficient separation to avoid contact between the gear housing and the gear assembly. The wall may have at least one concave curved segment to position the wall adjacent to a contour of outer surface structures of the gear assembly, but not contacting the gear assembly. An upper housing portion may be attached to the lower housing portion to enclose the gear assembly.