Abstract: A composite hybrid gear assembly includes a gear hub formed from a composite material and a gear head assembly. The gear hub includes a shaft region having an axially symmetrical external profile and a hub web region having a flared profile extending from the shaft region. The gear head assembly includes a head web region and a teeth region where the gear head assembly is fixed to the gear hub. Additionally, the composite hybrid gear assembly includes a first sleeve fixed to an external surface of the shaft region. An associated method of making a composite hybrid gear assembly is also provided.

Abstract: A bull gear is provided for a reciprocating pump. The bull gear includes a hub extending around an axis of rotation of the bull gear. The bull gear includes a rim having a plurality of helical gear teeth extending along a circumference of the rim. The rim extends a width along the axis of rotation from a first side portion to a second side portion that is opposite the first side portion. The bull gear includes a web connecting the hub to the rim. The web extends a radial length from the first side portion of the rim to the hub.

Abstract: Gear devices and methods for operating gear devices are provided. In one example, a gear device is provided that comprises structures designed to attenuate targeted vibrations occurring during rotation of the gear device. The structures includes radially aligned struts extending between an inner carrier and an outer carrier, a plurality of openings arranged between the struts, and/or resonators extending between sequential struts.

Abstract: A hybrid drive component, such as a pulley, a drive sprocket, or an idler is composed of metal and composite material. The drive component manufacturing methods extend the overall life of the pulley while also reducing material usage and product weight thereby making the application more efficient. The drive component includes a drive element, a hub/bearing element and a connecting element. The connecting element is a molded construction that interconnects the drive element and the hub element.

Abstract: A hollow shaft lubricating system is provided for lubricating a transmission through a hollow shaft inside a transmission case of the transmission. The hollow shaft lubricating system includes a stationary feeding cannula that extends inside the hollow shaft towards specific lubrication points in the transmission. The hollow shaft lubricating system further includes an external lubrication circuit in fluid communication with an opening in the transmission case. The stationary feeding cannula has a cannula inlet that receives the oil from the external lubrication circuit through the opening in the transmission case.

Abstract: A gear assembly comprising first and second gears configured to mesh with each other, the first gear comprising inner and outer ring elements and a resilient ring element disposed between and coupled to the inner and outer ring elements, the outer ring element comprising first gear teeth which mesh with second gear teeth of the second gear, wherein the first and second gears each comprise a positioning ring axially spaced apart from the first and second gear teeth, the positioning rings being configured to engage each other and limit the position of the first and second gear teeth relative to each other.

Abstract: A method for repairing a gear part (1) in a wind turbine, in particular repairing damaged teeth of a toothed rim (2). A repair cavity (10) is formed by removing material, including one or more damaged teeth, from the gear part (1) by drilling one or more holes through the gear part (1) along a direction which is substantially parallel to an axis of circular symmetry of the gear part (1). A repair segment (15) comprising one or more replacement gear teeth (16), and having a geometry which matches a geometry of the repair cavity (10), is arranged in the repair cavity (10), and attached to the gear part (1) by introducing one or more fasteners (17) into fastener openings (11, 13, 14) formed in the gear part (1).

Abstract: A drive roller (1) comprising a central hub (4), a body (5) extending around the central hub, the body (5) being made of a deformable material, a deformable band (8) extending over a circumference of the drive roller, and first rigid fins (17) and second rigid fins (18) arranged in alternation and extending radially inside the body (5). Each first fin presents a proximal end (17a) fastened to the central hub, and each second fin presents a distal end (18b) that extends in the proximity of the deformable band.

Abstract: Gear wheel and method for reducing vibrations transmitted by a rotating shaft. The gear wheel includes an inner part, which is connectable to a cause of vibration, a connection element and a ring gear. The connection element is structured and arranged to reduce vibrations.

Abstract: A power transmission device includes a transmission mechanism configured to transmit power generated by an electric motor to an output shaft, to which power generated by an internal combustion engine is transmitted, via engaging sections of a plurality of rotating members, and the transmission mechanism has a play to the engaging sections along a rotating direction, the play being larger than a relative displacement amount between the rotating member on the internal combustion engine side and the rotating member on the electric motor side when a rotation variation phase difference between the internal combustion engine and the electric motor is maximum. Therefore, there can be provided the power transmission device capable of suppressing an occurrence of noise.

Abstract: A toothed wheel has a sequence of X teeth, wherein each N-th tooth at least partially has a smaller tooth rigidity compared to the remaining X?N teeth, N being a number which is selected from a range with a lower limit of 2 and an upper limit of X, in particular X/2. Alternatively, a number of M teeth at least partially have a smaller tooth rigidity than the remaining X?M teeth, where M is selected from a range with a lower limit of 1 and an upper limit of X?1 or an upper limit of X provided that at least individual teeth are divided or all the teeth have a different geometry, and/or wherein the tooth system has a pitch in which each Nth tooth stands out compared to the remaining X?N teeth.

Abstract: A fishing reel drive gear is used for a fishing reel. The fishing reel drive gear is arranged to be meshed with a pinion gear. The fishing reel drive gear includes a gear tooth portion and a disc portion. The gear tooth portion has first and second gear teeth. The first gear tooth includes a first tooth surface. The second gear tooth includes a second tooth surface. The first tooth surface includes a first groove thereon. The second tooth surface includes a second groove thereon. The first and second grooves intersect with a mesh directional. The disc portion has an outer peripheral surface and a radially outer portion of a lateral face. The gear tooth portion is configured on the outer peripheral surface or the radially outer portion. The fishing reel drive gear is arranged to be meshed with the pinion gear in a direction of the mesh directional path.

Abstract: A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction.

Abstract: A robotic arm especially suited for laparoscopic surgery, having a torsional joint and a flexural joint forming serially arranged joints is described. The joints provide respective degrees of freedom for the arm, which further receives drive means for such joints. The robotic arm also has transmission means placed between the drive means have and the joints. The transmission means a first and a second assembly of three gear wheels, preferably conical gear wheels, and a train of three additional gear wheels, preferably straight-cut gear wheels, which couple the first and second assembly to form a differential mechanism.

Abstract: A gear assembly including a main gear including a first hub, a first gear ring positioned about the first hub, and a first helically splined region. The gear assembly further includes a sub-gear co-axially disposed relative to the main gear with a resilient member disposed therebetween. The sub-gear including a second hub, a second gear ring positioned about the second hub, and a second helically splined region complementary to the first helically splined region.

Abstract: A bevel gear drive with two bevel gears rotates about respective rotation axes intersecting at an intersection point, forming an angle of intersection. A computer determines the tooth shape of these tooth flanks based on data other than a tooth shape. The data are characteristic for a particular contact path represented by a sequence of contact points. The tooth shape of the tooth flanks is determined for several contact paths, with the interacting tooth flanks at all contact points having a common normal, which passes through a pitch point located between the two rotation axes and spaced from the intersection point equal to the radius r. Geometry data for the bevel gear are determined from the shape of the tooth flanks and stored in a format suitable for automatically generating a parts program for a processing machine with at least five axes.

Abstract: The invention concerns a gearwheel (1) with a gear rim (2) and an insert (3) whose external diameter (d3) is greater than half of the external diameter (d1) of the gearwheel (1), wherein the insert (3) is surrounded by injection molding by means of a cone mold during the manufacture of the gearwheel. In particular, the gear rim (2), including gear teeth on the external circumference, is formed at the same time during the injection molding process.

Abstract: A system and method to control vibrations exerted on a non-vibrating structure. The system includes an adjustable variable stiffness support securely attached to both the non-vibrating structure and a vibrating structure. A driver operably associated with the variable stiffness support is configured to selectively adjust the variable stiffness support. A control system in data communication with both a sensor system and the driver includes an algorithm to determine whether adjustment of the variable stiffness support is required.

Abstract: In a molded plastic part 1 including a body 2 constituting a design surface 2a and a reinforcing structure 3 projectingly provided on a design back surface 2b of the body 2, the body 2 and the reinforcing structure 3 being integrally molded by injection molding, the reinforcing structure 3 is formed by a combined body of a plurality of transverse ribs 7a, 7b, 7c and 7d which are arranged at appropriate intervals in the resin flow direction at the time of injection molding in the direction intersecting with the resin flow and longitudinal ribs 6p and 6q which extend at right angles to the transverse ribs and connect the transverse ribs to each other. The transverse ribs are connected to the design back surface 2b, and a gate 8 for injection molding is set on one of the transverse ribs. The longitudinal ribs are disposed so as to be separated from the design back surface 2b.

Abstract: A gear assembly including a main gear including a first hub, a first gear ring positioned about the first hub, and a first helically splined region. The gear assembly further includes a sub-gear co-axially disposed relative to the main gear with a resilient member disposed therebetween. The sub-gear including a second hub, a second gear ring positioned about the second hub, and a second helically splined region complementary to the first helically splined region.

Abstract: A fixing device and an image forming apparatus using this, in which even if permanent warping is produced on a roller member that forms a fixing nip portion, no collision sound is produced due to the collision of gears, the fixing device including: two roller members that form a nip portion in which a recording medium is pressed by pressure means and transported; and a drive gear that engages with a shaft portion of one of the two roller members and transmits driving force to that roller member. A key is formed in the drive gear and a key groove having a gap opened therein is formed in the shaft portion, and when a rotation velocity of the roller member increases, transmission of driving force from the drive gear to the shaft portion is suspended and the drive gear slides on the shaft portion.

Abstract: A scissors gear may include a main gear and a sub-gear co-axially combined by a scissors spring therebetween to integrally rotate, a first oil supply hole formed in the main gear or the sub-gear to supply oil from the outside, an oil groove formed in the sub-gear or the main gear to receive the oil by being selectively communicated with the first oil supply hole, and a check valve that is disposed in the main gear or the sub-gear to open/close the oil groove.

Abstract: A power transmission device is provided with: a first gear having a plurality of teeth that share an identical tooth profile; an intermediate gear that is engaged with the first gear; and a second gear that is engaged with the intermediate gear, and has a plurality of teeth that share an identical tooth profile, wherein the first gear and the second gear have an identical number of teeth, an identical reference diameter, and an identical reference pitch; and the tooth profile of the first gear is different from that of the second gear.

Abstract: A compliant gear assembly for a gear train of an internal combustion engine includes a hub subassembly having a first hub component and a second hub component. The first hub component defines a first axis, and the compliant gear assembly includes a gear ring rotatable relative to the hub subassembly and defining a gear ring axis of rotation. The second hub component is movable relative to the first hub component in a direction normal to the first axis between a first stop position at which the gear ring axis of rotation is co-linear with the first axis and a second stop position at which the gear ring axis of rotation is parallel to but not co-linear with the first axis. A compliance mechanism is coupled between the first hub component and the second hub component and biases the second hub component toward the first stop position.

Abstract: To render a gear arrangement for a transmission as quiet as possible but nevertheless able to handle heavy loads, a first gear made of a first material and a second gear made of a second material sit loosely next to one another on a common shaft. The elasticity of the first gear, preferably made of plastic, is chosen to be greater than that of the second gear, preferably made of metal, while the strength of the second gear is chosen to be greater than that of the first gear. Because the second gear preferably exhibits a slightly smaller toothing than the first gear, only the first gear comes into engagement with another gear in normal operation. As the load increases, the first gear made of plastic yields in the elastic range so that now the second gear made of metal also comes into engagement in order to accept the forces occurring and thereby protect the first gear against overloading and fracture. The gear arrangement is generally suitable for transmissions, for example for planetary transmissions.

Abstract: A torsional compensator having an inner hub, an outer sprocket, left and right grippers, and a resilient torsion sleeve. The torsion sleeve occupies a generally annular cavity between the inner hub and outer sprocket and each end of the sleeve is coupled to a gripper. One gripper is coupled to the inside of the outer sprocket and the other gripper is coupled to the outside of the inner hub and they are axially spaced apart. The inner hub supports the outer sprocket for coaxial rotation thereon.

Abstract: An automatic transmission has a park system with a shaft and a parking pawl. The shaft rotates in response to a gear shift lever, and a detent lever positions the parking pawl in response to rotation of the shaft. A detent spring assembly biases the detent lever and has a detent spring, cage, and roller assembly. The cage aligns the roller assembly, while the detent spring is connected to the cage at one end and has a flat reaction surface formed at a second end. A cage notch portion aligns the cage with the detent lever, and the roller assembly into a perpendicular orientation with detent lever teeth. The notch portion engages either a detent tooth or a stationary portion of an internal mode switch (IMS). A shaft inserts into a roller through a side hole in the cage to retain the roller assembly therewithin.

Abstract: The action curve (A), that is, the locus of the gearing contact points throughout the gearing process, is a lemniscate (Lg, Ld) having a double point coinciding with the rolling point (T) of two pitch circles (Prg, Prd). The gearing contact begins at one of the apexes (Sgh) of the lemniscate under a zero Hertzian pressure between two profile points where the profiles have the same curvature centered at the rolling point (T). Wear and operating noise are reduced.

Abstract: The invention relates to a skew gear constructed as a built skew gear and provided with attenuation. The skew gear wheel has a first flange for rotation-locked arrangement of the skew gear on a shaft or a pinion, a second flange or a disk, and a ring gear arranged and rotatable therebetween. The two flanges, or the first flange and the disk, are frictionally or positively connected with one another, wherein their respective elements providing the connection extend through the ring gear in the axial direction. According to the invention, at least one elastomeric element is overmolded on an inside contour of the ring gear for forming the attenuation, so that the ring gear and the attenuation form a single unit.

Abstract: A plastic gear having a gear peripheral portion including a tooth portion is constituted by a plastic material, and a gear inner circumferential member with an annular shape or a disk shape is provided at the inner circumferential side of the gear peripheral portion. The gear peripheral portion includes an inner core and a surface layer member, the inner core being covered with the surface layer member and made of plastic with high elastic modulus and high strength, and the surface layer member being made of plastic with relatively low elastic modulus. The inner core is revolvably fitted around the gear inner circumferential member so as to revolve around the gear revolving axis, and an engaging portion is provided at an interface of the surface layer member and the gear inner circumferential member for preventing relative revolution around the gear revolving axis.

Abstract: A power transmission device that can have deformation in processing suppressed. A spiral gear as a rotation member includes a disk section extending radially outwards from a boss section. The disk section includes a through hole in slit form through laser processing.

Abstract: A gear having a thin-walled section formed on one end face among two end faces of a tooth in a tooth-width direction is provided. A portion of the thin-walled section is projected and formed so as to serve as an overhanging section. The overhanging section prevents backlash. A thickness T3 of the overhanging section, a thickness T2 of a tooth flank corresponding section, and a thickness T1 of a tooth crest corresponding section positioned therebetween satisfies the relation T1<T3<T2.

Abstract: A rotation transmission member is composed of a shaft-like metal insert member having a first gear section on the external surface thereof and a resin gear resin-molded on the external surface of one end of the metal insert member and having a second gear section on the external surface thereof. The first gear section is formed almost over the entire length of the metal insert member and provides one end thereof as an insert portion on which the resin gear is to be resin-molded. Thus, it becomes unnecessary to provide a joint portion (the insert portion) between the metal insert member and the resin gear with the machining of any particular shape for preventing the coming-off therebetween.

Abstract: A variable stiffness support has a support housing that is configured to adjust the orientation of an internal elastomer assembly. The support housing includes an adjustment mechanism, and the elastomer assembly includes an outer ring that encircles an elastomeric material, a central bushing embedded in the elastomeric material, and a plurality of shims embedded in the elastomeric material in a parallel planar fashion.

Abstract: A gear arrangement is provided with a built-up for a shaft or pinion to rotate in unison therewith. The gear includes a gear rim and two flanges arranged axially on both sides and fixed them against the gear rim in a positive-locking connection. A hub, over which the respective other parts of the gear are pushed, is formed on at least one of the parts of the gear. The parts of the gear are held together without the use of rivets or screws by a clamped connection including a clamping ring, which is caused to mesh with a groove extending circumferentially on the circumference of the hub or shaft. The clamped connection presses the respective flange outer surface in a spring-mounted manner. Mutually corresponding elevations and depressions on the axial outer surfaces of the gear rim as well as on the axially inner surfaces of the flanges mesh with one another.

Abstract: A power transmission device that can have deformation in processing suppressed. A spiral gear as a rotation member includes a disk section extending radially outwards from a boss section. The disk section includes a through hole in slit form through laser processing.

Abstract: A resin gear for an electric power steering apparatus is provided which offers excellent mechanical strength and durability, and in which damage of teeth, does not occur even when the gear is employed in an electric power steering apparatus equipped with a high-power electric actuator. The resin gear for an electric power steering apparatus includes a worm wheel, and a gear portion thereof is formed of a resin molding material containing a thermosetting resin and polyparaphenylene-benzobisoxazole fibers (PBO fibers) as essential constituents.

Abstract: A power tool includes an impact damping mechanism for damping an impact in a direction of rotation of a speed reduction mechanism portion 8.

Abstract: A gear arrangement includes a first section having a first plurality of teeth and at least a portion of the first section is made of a compliant material. There is also a second section having a second plurality of teeth. The second section is made of a stiff material. The first section is arranged axially adjacent to the second section and each of the first plurality of teeth has a tooth flank that changes axially across the tooth flank. A method for manufacturing a gear arrangement includes fabricating a first gear, which includes a first plurality of teeth, and a bearing from a compliant material. The method also includes mounting a second gear, which includes a second plurality of teeth, to the bearing, aligning the first plurality of teeth with the second plurality of teeth, and coupling the first gear with the second gear.

Abstract: In a motor-driven power steering apparatus for a vehicle in which a worm wheel of a worm gear type speed reduction mechanism is fixed to a pinion shaft of a rack and pinion mechanism, a direction of a torsion angle ? of a helical pinion provided in the pinion shaft is set to be opposite to a direction of a tooth lead angle ? of the worm wheel.

Abstract: An injection molded resin gear 1 includes an outside rim 6, an inside hub 4, a web 7 extending in radial directions to connect the rim 6 to the hub 4, and circumferential ribs 8 which are formed on both sides 9 and 9 of the web 7 between the hub 4 and the rim 6 so as to be concentric with the rim 6. A plurality of inside radial ribs 10 extending from the hub 4 to the circumferential ribs 8 are formed on the sides 9 and 9 of the web 7 between the hub 4 and the circumferential rib 8 so as to be arranged in regular intervals in circumferential directions. A plurality of outside radial ribs 11 extending from the circumferential ribs 8 to the rim 6 are formed on the sides 9 and 9 of the web 7 between the circumferential ribs 8 and the rim 6 in regular intervals to be displaced in circumferential directions with respect to the inside radial ribs 10 so as to be arranged between connecting portions at which the inside radial ribs 10 are connected to the circumferential rib 8.

Abstract: The present invention is electronically driven locking device for a locking element of a motor vehicle. The device has a motor, a gear wheel including a gear ring, a hub, and an elastic intermediate element, and a control disk. The motor is linked to the gear ring via a worm gear which is arranged to turn the gear. The control disk is linked to the locking element such that when the gear ring is turned, the hub is turned via the intermediate element which in turn engages the locking element to close or open. The intermediate element is arranged to absorb kinetic energy in the device.

Abstract: The invention concerns a gear for precision devices comprising at least two mutually co-operating toothed wheels (10, 14). The teeth (12, 16) of the two wheels have the same thickness (e) and the teeth of one of them (10) are provided with a radial slot (26) which divides them into half-teeth (22, 24). On of said half-tooth (24) comprises a recess (28) enabling its elastic deformation in case of overloading.

Abstract: A gear drive mechanism with two rotary gears meshing with each other has a first friction rim surface rotationally coupled to one of the two gears and a second friction rim surface rotationally coupled to the other of the two gears. The friction rim surfaces are in mutual contact with each other and thereby enabled to transmit a friction-based torque between each other.

Abstract: An injection molded resin gear 1 has a rim 6 having teeth 7 on its outer periphery, a hub 4 for receiving therein a shaft, and a web 6 connecting the rim 6 to the hub 4. The thickness (t1) of the bottom 15 of the rim 6 is smaller than the thickness (t2) of the web 5. On the side faces 8 and 8 of the web 5, annular circumferential ribs 10, 11 and 12 protruding concentrically with the rim 6 and hub 4 are formed. The relationship between the thickness (t1) of the bottom 15 of the rim 6, the thickness (t2) of the web 5 and the thickness (t3) of the circumferential rib 12 is t1?t3<t2.

Abstract: A gear 1 made of a resin includes webs 5 (5a and 5b) formed so that the rigidity of the web is increased by a first circumferential rib 8, a second circumferential rib 10, first diametrical ribs 11 and second diametrical ribs 12, and the circumferential sectional shape of the outermost web 5c is a corrugated shape, whereby the rigidity of the outermost web 5c is increased. As a result, it is possible to increase the rigidity of the outermost web 5c without increasing of the thickness of the outermost web 5c; to form a toothed portion 6 with a high accuracy; to reduce the deformation (for example, the amount of displacement of the toothed portion 6 and a shaft-supporting portion 4 in a rotating direction) due to an external force; and to enhance the rotation-transmitting accuracy. In this gear 1, a vibration and a noise due to the vibration can be reduced by increasing the rigidity of the web.

Abstract: A gear made of a resin including substantially annular toothed portion formed at a radially outer location, a shaft-supporting section formed at a radially inner location around a rotational center of the toothed portion, and a web connecting the shaft-supporting section and the toothed portion to each other. A circumferential rib is formed on the web concentrically with the toothed portion, and diametrical ribs are also formed on the web radiately to connect the circumferential rib and the shaft-supporting section to each other in a radial direction.

Abstract: A transmission includes a clutch basket and a driving disc each having teeth and tooth spaces which correspond to one another. A plug-in intermeshing connection between the driving disc and the clutch basket is provided such that there is no torsional backlash and such that no rattling noises are produced. To this end, at least one of the teeth of the driving disc and/or at least one of the teeth of the clutch basked has a slot. The tooth thickness of at least one of the teeth of the driving disc is greater than at least one of the tooth space widths of the clutch basket. In order to avoid rattling noises, it is also suggested that at least one pair formed of a tooth and a corresponding opposite tooth space may be configured such that the tooth is displaced with respect to the corresponding tooth space.

Abstract: The invention is to offer a fishing reel having a power transmission mechanism enabling to remove backlash in a gear row with a simple structure. The fishing reel according to the invention has a power transmission mechanism for transmitting driving force so as to drive a rotor supported to a reel main body owing to rotating operation of a handle rotatably supported to the reel main body, and is characterized in that a driving force transmitting part of the power transmission mechanism is provided with a rotation power transmitting instrument to be effected by friction of an elastic member.

Abstract: A roller/damper is configured for use with an associated sliding object such as a drawer that is movable between a first position and a second position along a rail having a rack gear disposed thereon. The roller/damper includes a roller having an outside diameter that is configured for movement along the rail. A gear housing is disposed adjacent the roller and has gear teeth formed thereon for engaging the rail rack gear. A damper rotor is positioned in the gear housing. The roller, gear housing and rotor rotate about a common axis. A damping material is disposed about the damper rotor within the gear housing for damping rotation of the gear housing relative to the rotor. A shaft extends through the roller, the gear housing and the rotor. The rotor is fixed to the shaft and the roller and gear housing are rotational about the shaft independent of one another.