Abstract: A strain wave gearing is a negative deflection strain wave gearing. The tooth profile shape for the internally toothed gear is defined by using a convex, basic tooth profile curve, which is a curve portion from an inflection point (A) to a bottom-part point (B) of a moving locus (Mc) of an externally toothed gear with regard to an internally toothed gear obtained by a rack meshing approximation. The tooth profile shape for the externally toothed gear at a principal cross section is defined by a concave, basic tooth profile curve, which is generated in the externally toothed gear by the convex, basic tooth profile curve of the internally toothed gear moving from an apex (C) to an inflection point (A) of the moving locus (Mc). Passing-type meshing that is effective in lubrication is established, and bending stress in the tooth-bottom rim of the externally toothed gear can be reduced.

Abstract: A strain wave gear system (10) includes first and second sets of ball bearings (80, 82) located intermediate a flange (84) and a retainer plate (88) rotatable with an output (54) and a radially oriented flat disc (74) of the input including strain relief (76). Strain relief (76) is a helical slot in a coupling (70) located radially within the wave generator (94) and the ring gear (22). The ring gear (22) is sealed by a sealing system including sealant (42) forced by a protrusion (34) of the cap (24) entering into a cavity (36) through a channel (40) into a relief volume (38) of the housing (12). The bearing (48) rotatably mounting the housing (12) to the output (54) is lubricated by a lubricating system including plungers (110) threadably received in axial bores (102) intersecting with radial bores (104) in communication with radial holes (47) of the bearing (48).

Abstract: An externally toothed gear of a strain wave gearing is made to flex into a shape conforming to an ellipsoidal curve. The externally toothed gear meshes with an internally toothed gear at the major-diameter position of the ellipsoidal curve. These two meshing positions gradually change in the circumferential direction of the both gears along the tooth trace direction. The number of external teeth of the externally toothed gear participating in meshing with the internally toothed gear can be increased. A strain wave gearing which has a high rigidity and is capable of reducing vibrational noise, can be realized.

Abstract: A rotary damper that is to be fastened to a first mass via a fastening part (10) comprises a damper housing (2) surrounding an electromagnetic damper motor (4) which is disposed along a central axis of the rotary damper, a hinged lever 14) connected to a second mass, and a gearing (14) for transmitting and/or converting a relative rotation between the masses to the damper motor (4) such that vibrations are dampened. The fastening part (10) is connected to a bearing part (38) via an elastomer bearing (44), the damper motor (4) being disposed on said bearing part (38), and the damper housing (2) is connected to the hinged lever (14), which is mounted so as to be able to rotate relative to the bearing part (38).

Abstract: Systems and methods of reusing an imaging component include providing a used photoconductive drum assembly comprising a cylindrical photoconductive drum and a gear hub extending from an end of the photoconductive drum; removing the gear hub from the end of the photoconductive drum; and crimping a replacement photoconductive drum to the gear hub to form a remanufactured drum assembly.

Abstract: A press plate is tacked to a boss of a cup-shaped flexible externally toothed gear of a wave gear device unit. A second arm as a driven member is attached by a fastening bolt to an end surface on an outer side of an output flange of the wave gear device unit. The fastening bolt is screwed into and secured in a tap hole of the press plate from each bolt insertion hole of the second arm, via a flange-side bolt insertion hole and a boss-side bolt insertion hole. A fastening structure can be achieved in which a driven member is fastened to a wave gear device unit in which holes are easily machined into the output flange, and only a few fastening bolts are needed to fasten the boss, the output flange, and the driven member.

Abstract: A rotational damper includes a damper housing surrounding an electromagnetic damper motor and connected to a first mass via a fastening part; a coupling lever supported for pivoting relative to the damper housing and connected with a second mass; a strain wave gear mechanism for damping vibrations and including a rigid unit having an internal spline and being connected with the damper housing, and a flexible unit having an external spline and being fastened with the fastening part, wherein the first and second units are coupled with each other via the internal and external splines; a wave generator rotatably supported in the flexible unit, wherein a rotation of the wave generator causes a deformation of the flexible unit; and a wrap spring connected on one side in rotative fixed relationship with the coupling lever, and on another side connected in rotative fixed relationship with the fastening part, wherein at a predetermined pivoting of the coupling lever relative to the fastening part the wrap spring defor

Abstract: The invention provides a wave speed reducer having a self-locking function comprising a structure for outputting driving rotation of a bearing member or a spline wheel at a specific reduction ratio which drives rollers to rotate by a cam. A designed convex arc of the cam has self-locking function of restricting the rollers to reversely rotate so as to form a compound type reducer device having a multi-reducer function by mutually combining the wave speed reducer and a planetary gear set. To solve conventional problems, poor driving accuracy at tiny rotation angle and scarcity of self-locking function for conventional reducers are improved.

Abstract: Provided is a strain wave gearing apparatus which is able to make the most of the structural advantages of the flat form while achieving ideal mesh-engagement without involving a high degree of dimensional precision or any special adjustment mechanism. A strain wave gearing apparatus is provided with a stationary internal gear, a rotary internal gear disposed side by side with the stationary internal gear, a flexible planetary gear disposed on the inner peripheral side thereof for meshing partially with the internal gears by being deflected in the radial direction, and a wave generator disposed inside the flexible planetary gear for continuously deforming and deflecting the flexible planetary gear by rotation. In the apparatus, backlash during mesh-engagement is eliminated by making the base portions and of the internal gears and elastic.

Abstract: A vehicle seat includes a seat base and a seat back rotationally connected at a pivot. The seat base is rotatable about the pivot between a plurality of rotational positions relative to the seat base. A recliner disk is positioned at the pivot. The recliner disk includes a guide plate coupled to the seat base and a tooth plate coupled to the seat back. A plurality of bearings is positioned between the guide and tooth plates. The plurality of bearings and the guide and tooth plates are free of an internal braking mechanism. The engagement of the guide and tooth plates with the bearings provide for substantially free rotational movement between the plurality of rotational positions. The bearings also fix the relative axial position of the guide plate relative to the tooth plate.

Abstract: The addendum tooth profile of the inner teeth and outer teeth of a strain wave gearing is stipulated by a first and second similar curve obtained from the curve segment from an inflection point to a low point in a movement trajectory when the meshing of both teeth is approximated by rack meshing. The addendum tooth profile of the inner teeth is stipulated by a curve generated at the inner teeth in the process of the addendum profile of the outer teeth moving from the inflection point to the apex of the movement trajectory. The addendum tooth profile of the outer teeth is stipulated by a curve generated at the outer teeth when the addendum profile of the inner teeth moves from the inflection point to the apex. The addendum profile of the outer teeth makes double contact with the addendum profile and dedendum profile of the inner teeth.

Abstract: A harmonic drive includes a rigid internal gear, a flexible external gear meshed with the rigid internal gear, and a wave generator abutted against the flexible external gear. Through a special parameter setting to design the outer peripheral edge of the wave generator in a surface of variable curvature, the contact area between the wave generator and the flexible external gear is increased to improve fretting wear, thereby enhancing transmission accuracy and reducing hysteresis error.

Abstract: Exemplary embodiments of the invention are directed to drive mechanisms that may be used in, for example, power transmission and/or speed reduction applications. Exemplary embodiments of the invention may include a housing within which is located a wheel. A portion of a wave generator and a portion of an output element also reside within the chamber and are in communication with the wheel. Rotation of the wave generator causes a rotation of the wheel in a slipping manner and, thus, with a reduced rotational speed. Rotation of the wheel causes a rotation of the output element.

Abstract: First and second external tooth gear parts of a strain wave gearing are bent in an elliptic shape by a wave generator to engage with first and second internal tooth gears, respectively. The first and second external tooth gear parts are bent so as to have elliptic shapes the phases of which are rotated 90 degrees from each other about a rotational center line. A coupling external tooth gear part that maintains a circular cross-sectional shape which does not deform is formed in between the first and second external tooth gear parts. The coupling external tooth gear part is maintained so as to be coupled with a coupling internal tooth gear in an engaged manner. The strain wave gearing has high engagement rigidity and is capable of transmitting large torque.

Abstract: A strain wave gearing speed changing apparatus has a coaxial pair of circular splines including a first with tooth number TA and a second with TD. A coaxial pair of flex splines includes a first with tooth number TB and a second with TC. First flex spline meshes first circular spline and second flex spline meshes second circular spline at two, preferably more, meshing engagements. A wave generator is connected to one of the input and output shafts. Two flex splines are fixed together to operate flexingly on the wave generator with equal spline tooth engagement pitch circle circumference lengths. One circular spline is fixed to the apparatus frame and the other is connected to the other of the input and output shafts not connected to the wave generator. The four splines satisfy TA=TK+Ti, TB=TK, TC=TK?Tj and TD=TK+Ti?Tj.

Abstract: A hollow-type strain wave gearing unit has a cup-shaped flexible externally-toothed gear, in which one shaft end portion of a hollow rotation shaft of a wave generator is located. The shaft end portion is supported by a bearing mounted on a bearing holder fixed to a boss of the flexible externally-toothed gear. The bearing holder has a retainer holding portion to prevent a retainer of a wave generator bearing from coming off in the axis line direction. There is no need to dispose a retainer holding plate of the wave generator bearing inside the flexible externally-toothed gear, whereby the axial length of the hollow-type strain wave gearing unit can be reduced.

Abstract: A harmonic drive apparatus (also known as a strain wave gear) is constructed with a circular, flexible spline disc having a slightly conical configuration. The flexible saline disc has opposite convex and concave surfaces with a plurality of radial, flexible gear teeth arranged circumferentially on the convex surface. The flexible spline disc enables the harmonic drive apparatus to provide a thinner or more compact packing when needed for unique space requirements of a speed reduction transmission.

Abstract: A cup-shaped flexible externally toothed gear of a wave gear device, wherein a diaphragm plate slopes from a diaphragm internal peripheral edge portion contiguous to a boss part toward a diaphragm external peripheral edge portion contiguous to a cylindrical body portion in a direction in which the diaphragm external peripheral edge portion is at greater distance from an open end of the cylindrical body portion with respect to an orthogonal plane orthogonal to a central axis line of the device. The length dimension of the diaphragm plate and the length dimension of the cylindrical body portion in the axial direction can be increased. Therefore, the fatigue strength of the diaphragm plate and the load capacity of the wave gear device in which the flexible externally toothed gear has been incorporated can be increased.

Abstract: A harmonic drive gear reduction mechanism includes a rigid inner spline with 2(n+1) teeth and a tooth module of m, a flexible outer spline inserted in the rigid inner spline has 2n teeth and a tooth module of m, a flexible bearing inserted in the flexible outer spline, and a wave generator inserted in the flexible bearing. A thickness between an inner diameter of the flexible bearing and a pitch diameter of the flexible outer spline is t, a cross sectional profile of the wave generator consists four curves, the first and third curves have a radius of curvature R, R=m (n+1)?t, a central angle of the first and third curves is k, and 10<k?60, the second and fourth curves and conjunction points between the second, fourth curves and the first, third curves can be first-order differentiated.

Abstract: A strain wave gearing (1) has a flexible externally toothed gear (3) with a boss (7). A boss-side fastening surface (16) formed on the boss is coaxially superposed with a member-side fastening surface (15) of an output member (11), and the boss (7) and the output member are fastened by fastening bolts (13). The bolt tension of the fastening bolts (13) causes the engaging protuberances (20) of the boss-side fastening surface (16) to dig into the member-side fastening surface (15) by a predetermined dig-in depth. A large frictional force is produced in the fastening portions between the flexible externally toothed gear (3) and the output member (11). It is thereby possible to transmit the necessary torque by the bolt tension alone without using pins or a friction sheet together with the fastening bolts.

Abstract: A hollow-type strain wave gearing unit (1) has a sealing member (14) for sealing a gap (15) opening to the inner peripheral surface of a unit hollow portion (5) passing through in an axis (1a) direction. The gap (15) includes a gap section (15b) between an outer peripheral side end race (48b) on the wave generator side and a boss side end face (108), both faces opposing each other in the axis (1a) direction, and the sealing member (14) is assembled therein. The gap section (15b) is formed in a state partially entering the inside of the inner ring (11b) of the second bearing (11) supporting the wave generator (4). It is possible to realize a hollow-type strain wave gearing unit with a sealing mechanism that is suitable for increasing the inner diameter of the unit hollow portion and for reducing the unit axial length.

Abstract: A selectively disconnectable and reconnectable harmonic drive assembly of a rotary actuator is provided. The drive assembly includes a harmonic wave generator configured to rotate and disconnect and reconnect a harmonic drive of the actuator by moving radially inward to allow the disconnect of a flex spline from a ring gear and radially outward to allow the reconnect of the flex spline to the ring gear. With respect to the disconnect, roller bearings and a disconnect spring are configured to push the wave generator axially when a solenoid is activated, allowing the roller bearings to move radially inward. This movement releases an outward force on the flex spline, disconnecting the flex spline from the ring gear. The solenoid is deactivated so that a ball-lock sleeve is forced axially by a ball-lock-sleeve-return spring, and ball bearings are forced radially into a groove in a locked “disconnect” position.

Abstract: A harmonic drive assembly with selective disconnect includes a motor with a motor drive shaft, a harmonic drive operatively coupled to the motor drive shaft, and a wave generator operatively coupled to the motor drive shaft and a flex gear of the harmonic drive. Also included is a ring gear of the harmonic drive operatively coupled to the flex gear with a plurality of ring gear teeth configured to mesh with a plurality of flex gear teeth. Further included is an output shaft operatively coupled to the harmonic drive. Yet further included is a retracting mechanism configured to selectively retract the motor drive shaft and the wave generator to decouple the motor drive shaft and the wave generator from the harmonic drive, wherein a clearance between the ring gear teeth and the flex gear teeth is established upon retraction of the motor drive shaft and the wave generator.

Abstract: A disc recliner for a seat assembly includes a fixed plate secured to a seat cushion and a rotatable plate secured to a seat back. Each of the fixed and rotatable plates has a plurality of teeth, the number of teeth not being equal. A flex spline has a plurality of teeth, the number of teeth being equal to the number of teeth on the fixed plate. A wave generator causes a portion of the teeth on the flex spline to meshingly engage with the teeth on the fixed and rotatable plates. Rotation of the wave generator causes the teeth on the flex spline which meshingly engage with the teeth on the fixed and rotatable plates to change, thereby causing the rotatable plate to rotate relative to the fixed plate, which in turn causes the seat back to pivot relative to the seat cushion.

Abstract: A modular rotational electric actuator includes an output housing and internal drive components that include integrated control electronics, a torque sensor, and a portion of a joint assembly. The joint assembly includes a joint connector coupled to the internal drive components, including integrated control electronics, e.g., by a resilient member. The resilient member elastically couples the joint connector to a portion of the output housing, the joint connector including a portion that extends outward therefrom.

Abstract: In a hollow wave gear device, a rigid internally toothed gear and a wave generator are disposed adjacent along a center axis line so as to enclose a cylindrical barrel part of a flexible externally toothed gear from the outside. A pushed cylindrical portion adjacent to an external-tooth-formed cylindrical portion of the cylindrical barrel part is pushed from the outside and made to flex into an ellipsoidal shape by the wave generator disposed on the outside thereof, whereby external teeth partially mesh with internal teeth of the rigid internally toothed gear. The inside diameter dimension of a hollow part can be the inside diameter of the cylindrical barrel part of the flexible externally toothed gear, and a hollow wave gear device can be achieved which is formed with a hollow part having a large inside diameter.

Abstract: A harmonic drive includes a first flexible gear and a second flexible gear disposed around the first flexible gear and coaxial with the first flexible gear. A first ring gear meshes with the first flexible gear, and a second ring gear meshes with the second flexible gear.

Abstract: A speed-reduction transmission bearing includes a first outer race and a second outer race, each having a different number of inner teeth and outer teeth and being attached to each other, rolling elements set between the first and second outer races to prevent separation between the first and second outer races in axial or radial direction, an inner race rotatably mounted within the first and second outer races, and a wave generator rotatable to push the inner race, forcing the outer teeth of the inner race to partially mesh with the inner teeth of the first and second outer race. Thus, by means of rotation of a tooth number difference, the invention achieves high reduction ratio transmission.

Abstract: A wave generator for a wave gear device is provided with a pair of first rollers arranged in a position that is point-symmetric in relation to the center of a flexible externally toothed gear, a pair of second rollers, and a pair of third rollers. The first rollers are located on a long axis of the flexible externally toothed gear that is being flex into an ellipsoidal shape, and the second and third rollers are located in positions that are linearly symmetric in relation to the long axis between the long axis and a short axis. Support bearings of the first rollers are larger than those of the second and third rollers. The rolling fatigue life of a roller-type of the wave generator can be to be enhanced.

Abstract: Bracket assemblies for use with actuators are described. An example apparatus includes a bracket defining first apertures and second apertures. The first apertures are to receive fasteners to couple a first end of the bracket to an actuator. One or more of the second apertures is to receive fasteners to couple a controller to the bracket. The actuator is to be on a first side of the bracket and the controller to be on a second side of the bracket. The example apparatus also includes an adjuster to be coupled to the bracket. The adjuster is to vary a distance between a second end of the bracket and the actuator and to support the second end relative to the actuator.

Abstract: A gearbox comprises a gearbox housing containing a gear train whose shafts are supported by the housing. The housing is fastened to a mounting plate at exactly three mounting points. A number of features cooperate with this three mounting point structure to reduce distortion of the housing that may cause misalignment of individual meshing gears in the gear train, leading to premature failure of those gears transmitting high torque.

Abstract: In a wave gear device, an involute tooth profile with the low pressure angle ? (<20°) is employed as a basic tooth profile of external teeth of a flexible external gear. In the principal section of the external teeth, the tooth depth thereof satisfies 2?0mn=2(1+c) mn (deflection coefficient ?0=1+c, 0<c<0.5), which is larger than the standard one. The shifting of the teeth which takes into account coning is performed along the tooth trace direction of the external teeth, so that straight portions of a rack tooth profile on the respective sections perpendicular to the axis in the tooth trace direction of the external teeth are conformed as viewed along the tooth trace direction. The rack tooth profile of the involute tooth profile is a straight line.

Abstract: A concentric double axis actuator has a two-stage cross roller bearing, and a preceding-stage actuator and a subsequent-stage actuator which are linked in tandem. The front end of a subsequent stage rotary output shaft of the subsequent actuator, said subsequent stage rotary output shaft passing through a hollow section of the preceding-stage actuator and projecting forward, is linked and fixed to an inner ring of the two-stage cross roller bearing, and the inner ring functions as a subsequent-stage rotary output member. The output rotary side of the preceding-stage actuator is linked to an middle ring of the two-stage cross roller bearing, which functions as a preceding-stage rotary output member. The rotary output element of each stage is supported by the two-stage cross roller bearing, and surface oscillations of the rotary output member of each stage can be minimized, and the moment stiffness of the members can be increased.

Abstract: A drive system having an integrated transmission and motor/generator unit for a wind turbine includes a transmission output shaft designed as a hollow shaft, which receives a sun shaft of an output-side planetary gear stage and is connected thereto. The transmission output shaft comprises a transmission-side end section of an insert shaft which is concentrically arranged within a rotor hollow shaft. The transmission output shaft additionally has a bearing for receiving radial and axial forces. The motor/generator unit has two dedicated bearings. One bearing thereof is a transmission-side bearing. In addition, a rear-side generator bearing is provided.

Abstract: A transmission device includes an input shaft, a first transmission mechanism, a speed changing mechanism, and an output shaft. The first transmission mechanism includes a transmission shaft, an inner magnetic member received in the transmission shaft, a mounting housing coupled to the input shaft, and an outer magnetic member. The input shaft is configured to rotate the mounting housing. The outer magnetic member is received in the mounting housing and positioned adjacent to the inner magnetic member. A magnetic pole of the inner magnetic member is opposite to a magnetic pole of the outer magnetic member. The speed changing mechanism is coupled to the transmission shaft. The output shaft is coupled to the speed changing mechanism.

Abstract: A strain wave gear apparatus includes a rigid internal gear, a flexible external gear, and a wave generator. The wave generator includes an input shaft fixing member including eccentric cams, bearings respectively fixed to outer sides of the eccentric cams, and housings respectively fitted to outer peripheral surfaces of the bearings. The eccentric cams are arranged side by side in a direction of an inclined axis inclined with respect to an input rotation axis at an inclination angle (?) in a manner that respective center axes of the eccentric cams are parallel to the inclined axis and decentered in directions opposite to each other from the inclined axis. The housings are each formed into a tapered shape so that an outer peripheral surface of each of the housings is held in surface contact with an inner peripheral surface of the flexible external gear.

Abstract: An improved strain wave drive system employs an outer circular spline part and an outer dynamic spline part spaced apart by a gap from each other in a widthwise (axial) direction and each having a array of internally facing gear teeth, a two-part inner flexible spline (flexspline) having two different sets of externally facing toothed projections offset by a gap from each other across a width extending in a widthwise (axial) direction, a wave generator coupled to the central rotor or shaft for generating a wave impulse that displaces the inner flexspline toothed projections into mesh with those of the outer circular spline part and an array of roller bearings supporting an inner surface across the width of the flexspline in rolling line bearing contact.

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 cup-shaped flexible externally toothed gear of a wave gear device comprises a cylindrical body part, and an external-teeth area thereof includes a pushed portion pushed radially outward by a wave generator and a groove formed in a position adjacent to the pushed portion toward a diaphragm. The reaction force of the wave generator can be reduced because the groove is formed to partially reduce thickness in a portion that does not affect the root strength of the external teeth. The increase in root stress can be suppressed when the roots of the external teeth are thickened, and root strength can be effectively increased. The load torque of the wave gear device can thereby be increased.

Abstract: In a wave gear device, an annular rigid externally toothed gear is disposed on the inner side of a cup-shaped flexible internally toothed gear. An internal-tooth-formation portion of the flexible internally toothed gear and a pushed portion pushed by a wave generator and flexed ellipsoidally are formed in different positions along the center axis line. The wave generator is disposed on the inner side of the flexible internally toothed gear, the pushed cylindrical portion is pushed from the inner side to the outside along the radial direction thereof by the wave generator, whereby the pushed cylindrical portion is flexed ellipsodially. As the outside diameter dimension of the wave gear device is determined by that of the flexible internally toothed gear, a wave gear device having a small outside diameter dimension can be obtained.

Abstract: A wave gear unit has an input shaft positioned along a center axis by first and second input bearings. A first unit end plate at the first-input-bearing side is a composite member in which a bearing housing member of an iron-based material is integrated with an end plate main body member of a lightweight material. A second unit end plate at the second-input-bearing side is integrated with a rigid internally toothed gear, and is a composite member in which a second member of a lightweight material is integrated with a first member of a lightweight material. The first member has an end plate main body portion of the second unit end plate and a gear main body portion of the rigid internally toothed gear, while the second member has a bearing housing portion of the second unit end plate and a teeth formation portion of the rigid internally toothed gear.

Abstract: Systems and methods in accordance with embodiments of the invention implement bulk metallic glass-based macroscale gears. In one embodiment, a method of fabricating a bulk metallic glass-based macroscale gear, where at least either the thickness of the gear is greater than 3 mm or the diameter of the gear is greater than 9 mm, includes: obtaining design parameters of the gear to be formed; selecting a bulk metallic glass from which the gear will be formed based on the obtained design parameters, where the selected bulk metallic glass is characterized by a resistance to standard modes of wear and a resistance to brittle fracture such that a gear can be formed from the selected bulk metallic glass that accords with the obtained design parameters; and fabricating the gear from the selected bulk metallic glass that accords with the obtained design parameters.

Abstract: In an elliptical rim neutral line of each axially perpendicular cross section in a tooth trace direction of a flexible externally toothed gear of a wave gear device, external teeth are applied with addendum modification along the external teeth tooth trace direction so that the bending stress generated at the root rim surface of the external teeth that is caused by flexing of the flexible externally toothed gear is averaged out, the maximum value thereof can be reduced, and the transferred torque of the wave gear device can be increased.

Abstract: A balancing device for an engine includes a crankshaft for converting reciprocal motion of a piston of the engine to a rotary motion, at least one electromagnetic force generator mounted apart from the crankshaft by a predetermined distance and generating an electromagnetic force, and a control portion controlling the electromagnetic force generator to generate an electromagnetic force offsetting an unbalanced force occurring according to a rotational position of the crankshaft.

Abstract: A bearing with antiskid design used in combination with a circular spline to form a harmonic drive, and the circular spline is provided with an inner toothed portion, the bearing includes: an elliptical gear plug, a flexible ball bearing, and a flexible spline. Between the flexible ball bearing and the flexible spline are disposed a first and second antiskid members, and the arrangement of the first and second antiskid members prevents the axial slippage between the flexible ball bearing and the flexible spline, thus improving stability and transmission accuracy of the harmonic drive.

Abstract: Transmission, in particular for converting a rotational movement around the longitudinal axis of the transmission into a linear movement in the direction of the longitudinal axis or vice versa, having a rod having a gearing, a gear tooth carrier, in which gear teeth are accommodated so they are radially movable for an engagement with the gearing, the rod and the gear tooth carrier being mounted rotationally fixed relative to one another.

Abstract: A unit type wave gear device (1) has a unit housing (2), one end of which is defined by a two-stage cross roller bearing (7). The two-stage cross roller bearing (7) has: an inner cross roller bearing formed by an inner ring (13), an intermediate ring (12), and inner rollers (17) inserted into an inner track (16); and has an outer cross roller bearing formed by an outer ring (11), the intermediate ring (12), and outer rollers (15) inserted into an outer track (14). A flexible externally-toothed gear (22) affixed to the intermediate ring (12) is rotatably supported by the unit housing (2) via the outer cross roller bearing. An input shaft (4) affixed to the inner ring (13) and a wave generator (23) affixed to the input shaft (4) are rotatably supported by the intermediate ring (12) via the inner cross roller bearing. A unit type wave gear device can be realized in which the number of components are reduced and a large moment load is applied.

Abstract: A harmonic reducer with clutch function includes a circular spline, a mounting base, a flexspline and a wave generator. When a power source drives the wave generator to rotate in a first direction, a one-way clutch engages to lock the mounting base so as to deform the flexspline and hence rotate the circular spline in the first direction. When an external force is applied to the output shaft in the first direction, the mounting base is driven by the flexspline so the one-way clutch disposed thereon is disengaged by a force in a second direction. At this moment, the rotation speed of the wave generator is equal to zero relative to the flexspline, so the wave generator can be driven by the circular spline to rotate along with the flexspline, and the central axel of the wave generator can be driven to rotate as well.

Abstract: The present invention provides a driving component, a photosensitive drum and a process cartridge. The driving component comprises a gear having one fixed end and a regulating component having a rotational driving force receiver outside the other end projecting from the gear. The regulating component is provided within the gear by being moved reciprocally and translationally along the gear's longitudinal direction and a first direction perpendicular to the longitudinal direction relative to the gear. A spring support part and a longitudinal position limit part are provided between the regulating component and the gear. The rotational driving force receiver is provided inside the regulating component by rotating around its own axis. Compared to the existing technology, the process cartridge using this driving component has a smooth engagement with a printer, reliable performance and stable work.

Abstract: An externally toothed portion of a cup-shaped flexible externally toothed gear of a wave gear device is flexed into an ellipsoidal shape by a six-roller-type wave generator. A region of an inner peripheral surface of the ellipsoidally flexed externally toothed portion that is positioned on a major axis of the ellipsoidal shape is maximally inclined. First rollers of the wave generator are arranged so that the incline is identical to the incline of the region of the inner peripheral surface. A circular outer peripheral surface of the first rollers can be brought into contact with the region of the inner peripheral surface in an external-tooth tooth-trace direction without deflection; therefore, the angular transmission precision of the wave gear device can be improved.