Abstract: The present invention relates to a power transmission device, which includes: a worm shaft; a Janggu (slim waist drum)-shaped worm which is provided on the worm shaft, and has a diameter-reduced part whose outer diameter is increased toward both ends from a center thereof in an axial direction of the worm shaft, wherein the diameter-reduced part has spiral worm teeth formed thereon; a first transmission shaft disposed in parallel to the worm shaft at an interval; and a first transmission gear which is provided on the first transmission shaft, and includes first gear teeth having tooth shapes conjugated with the worm teeth of the Janggu-shaped worm and are continuously formed in a spiral shape on an outer circumferential surface thereof, thus to rotate by threadedly engaging with the worm teeth of the Janggu-shaped worm.

Abstract: A robot has brake and accelerator actuating levers (9, 10) and a rotary actuator (12) between them. A drive ring (16) is fast with an actuator drive member (14) and between them they captivate a journal bearing (17) for the brake actuating lever (9) on which a return spring (19) acts. Advance of the lever is via a cam member (31) adjacent it. Wherever the output drive member (14) from the rotary actuator is turned, the cam member is rotated correspondingly. For brake application, the drive member (14) is driven, clockwise in FIG. 2. For brake release, and accelerator application, the drive member is driven back and the cam member is disengaged from the lever (9) with unidirectional freedom. The drive ring (16) is carried on a central ‘clutch’ member (35). The central member (35) is journalled in a fixed clutch member (36), which carries a clutch operating winding (38) for clutching together the central member (35) and an accelerator drive member (39) journalled on the central member.

Abstract: A gear includes an inner hub formed of metal material, the inner hub having an outer surface defining a plurality of outer teeth. The gear also includes an outer ring formed of non-metal material, the outer ring having an inner diameter that is smooth. The outer ring is disposed in an interference fit with the outer teeth of the inner hub.

Abstract: A screw actuator having a screw shaft and a nut arrangement is described herein, the nut arrangement comprising: a primary nut; a first secondary nut having a first thread; a second secondary nut having a second thread; and a first attachment means. The first nut, first secondary nut, and second secondary nut are connected to the first attachment means with a first, initial, axial spacing between the first and second secondary nuts. The first secondary nut is mounted to the first attachment means via bearings that allow the first secondary nut to rotate relative to the first attachment. The first secondary nut is connected to the second secondary nut via a screw thread connection having a pitch lower than a pitch of a screw thread of the screw actuator shaft.

Abstract: [Problem] Provided is a link mechanism capable of moving a tip end part substantially straight by using a simpler structure. [Solution] A link mechanism including a first parallel link mechanism having a fixed link and an intermediate link parallel to each other, and a pair of side links parallel to each other, a second parallel link mechanism having a fixed link and an intermediate link parallel to each other, and a pair of side links parallel to each other, in which the fixed link is connected to the intermediate link of the first parallel link mechanism, a fixed structure that is formed including the intermediate link of the first parallel link mechanism and the fixed link of the second parallel link mechanism, and a coupling link that couples one of the side links of the first parallel link mechanism and one of the side links of the second parallel link mechanism.

Abstract: The present disclosure relates to a composition for a worm wheel having excellent durability and wear resistance and a worm wheel manufactured using the same. In one embodiment, the composition for a worm wheel includes a polyamide resin, wherein the polyamide resin includes a polyamide 66 resin having a relative viscosity (RV) of about 2.5 or higher and a polyamide 12 resin having a relative viscosity (RV) of about 1.0 or higher.

Abstract: A gear reduction mechanism (1) includes a drive gear (10) having a rotation axis (L1), and a driven gear (20) driven in mesh with the drive gear (10) and having a rotation axis (L2) that is noncoplanar with the rotation axis (L1). The drive gear (10) is provided with spiral teeth, each having a tooth trace of a spiral curve having a spiral center on the rotation axis (L1) and a constant radial pitch, when viewed in the direction of the rotation axis (L1). Furthermore, the tooth profile of the driven gear (20) is set, considering a tangent angle that changes momentarily as the drive gear (10) rotates.

Abstract: A gear component has an annular form, is made of a metal, and includes tooth portions and a support portion which supports the tooth portions. The tooth portions are provided on an outside of the support portion along an entire circumference thereof, and groove portions are provided along a width direction of the gear component evenly on an annular inner surface of the support portion. At least one groove portion is provided per one tooth portion or two or more adjacent tooth portions, and each groove portion is located to correspond to a position where one tooth portion is present on the support portion.

Abstract: A hollow strain-wave gear device (1) has a wave generator (5), a wave generator plug (5a) of which is integrally formed in a portion of a hollow rotating shaft (6). A plug reinforcement part (5d), which is adjacent to the wave generator plug (5a), has a thickness larger than that of the wave generator plug (5a), and is integrally formed in the hollow rotating shaft (6). The wave generator plug (5a) is reinforced by the highly rigid plug reinforcement part (5d) formed adjacently to the wave generator plug (5a). It is thus possible to prevent or suppress a decline in the rigidity of the wave generator plug (5a) when the hollow rotating shaft has a thin thickness in order to reduce the weight of the hollow rotating shaft (6) and increase the diameter of the hollow portion thereof. Consequently, it is possible to suppress a decline in ratcheting torque.

Abstract: The present invention relates to a gear shift arrangement (100) for a transmission arrangement of a vehicle, the gear shift arrangement comprising an axially movable first connecting mechanism (102) connectable to a first gear wheel for engagement of a first gear of the transmission arrangement; an axially movable second connecting mechanism (104) connectable to a second gear wheel for engagement of a second gear of the transmission arrangement; an actuator arrangement (106) configured to controllably connect the first connecting mechanism (102) and the first gear wheel to each other, and to controllably connect the second connecting mechanism (104) and the second gear wheel to each other, wherein the first connecting mechanism (102) comprises a first connector element (108), the second connecting mechanism (104) comprises a second connector element (110) and the actuator arrangement (106) comprises an actuator connector element (112), wherein the second connector element (110) at least partially enclosing th

Abstract: A rotary actuator for a hinged panel assembly, e.g., of a fixed-wing aircraft, includes ball bearings, an outer cylinder, a piston, and an inner shaft. The outer cylinder admits fluid pressure from a fluid pressure supply. The piston is circumscribed by the outer cylinder. The piston, outer cylinder, and ball bearings collectively forming an outer ball screw. The piston translates along a longitudinal center axis in response to the fluid pressure. The inner shaft is circumscribed by the piston, with the inner shaft, piston, and ball bearings collectively forming an inner ball screw that is concentric with the outer ball screw. The ball screws form an interlaced ball circuit with one or more shared ball paths. Piston translation rotates the piston and inner shaft, and to thereby recirculates the ball bearings between the outer ball screw and the inner ball screw through the interlaced ball circuit.

Abstract: A linear motion system comprises a guiding member, a moving member, a plurality of rolling members and a preload adjusting module. The moving member is slidably disposed on the guiding member. The moving member and the guiding member together form a circulation path. When the guiding member moves with relative to the moving member, the moving member can generate a linear movement with relative to the guiding member. The rolling members are accommodated in the circulation path. The preload adjusting module is disposed on the moving member, and comprises a preload assembly and a preload regulator. The preload regulator applies a thrust to the preload assembly to adjust a preload value generated by the rolling members and applied to the moving member.

Abstract: A reducer of a power steering apparatus for vehicle. The formability and precision of a worm wheel is improved. The mechanical strength and durability of the worm wheel is increased so the reducer can be stably driven for a long time when a high power is transmitted from a worm shaft to a steering shaft through the worm wheel.

Abstract: The present invention provides a height adjustment pillow including a lifting device adjusting the height of an upper member with respect to a lower member, the lifting device comprising: a drive shaft passing through the lower member with a lower end part thereof protruding from a lower part of the lower member and having a manipulation handle provided in the lower end part; at least one or more rotation members mounted on the lower member to be rotatable relative to upward and downward directional shafts thereof; a power train transmitting a rotational force of the drive shaft to the rotation members; and lifting operation equipment converting a rotational movement of the rotation member into a rectilinear movement of the upward and downward directions so as to lift and lower the upper member.

Abstract: A cycloid speed reducer includes a weight element, an input shaft and a cycloid disc. The weight element is disposed within an accommodation space of the cycloid disc. An eccentric part is disposed on the input shaft. Since the length of the input shaft is reduced, the overall length of the cycloid speed reducer is shortened. Moreover, the mass center of the weight element and the mass center of the eccentric part and the cycloid disc are arranged along the same axial direction. That is, the line passing through the mass center of the weight element and the mass center of the eccentric part and the cycloid disc is perpendicular to the input shaft. Consequently, the efficacy of the dynamic balance of the cycloid speed reducer is enhanced.

Abstract: A multi-component gear for an actuator is provided. The gear includes a first gear portion having an engagement head and a gear stem axially extending from the engagement head, and a second gear portion having a gear body which includes a plurality of gear teeth at a circumference thereof, the gear body being received around the engagement head of the first gear portion. The first gear portion is formed from a first material and the second gear portion is formed from a second material which has a lower dynamic hardness than the first material.

Abstract: A motion conversion apparatus (110) comprises a rodrack assembly (110) and a gearshaft member (150). The rodrack assembly (110) comprises a first gear connection member (120) and two guide members (140). The gearshaft member (150) comprises a second gear connection member (160) configured to engage with the first gear connection member (120), and a guiding surface arrangement (170) configured to contact the guide members (140). The rodrack assembly (110) is configured to provide rotation of the gearshaft member (150) about a rotational axis (A) by reciprocating linear motion of the rodrack assembly (110) along a first spatial dimension (D1) orthogonal to the rotational axis (A), and/or the gearshaft member (150) is configured to provide reciprocating linear motion of the rodrack assembly (110) along the first spatial dimension (D1) by rotational motion of the gearshaft member (150) about the rotational axis (A).

Abstract: Disclosed is a compound harmonic gearbox having: a first ground gear and a second ground gear being interconnected about a stationary shaft to form a housing, wherein only the first ground gear includes gearbox mounting features; an output flange partially encased within the housing; a flex spline within the housing that drives the output flange; a wave generator within the housing that drives the flex spline; an input shaft with an input gear that drives the wave generator, the input shaft extending through the first ground gear, wherein the output flange is configured to rotate completely around the stationary shaft by rotating the input shaft.

Abstract: A select control device for an automatic transmission includes a select lever and a controller. The select lever is configured to select a range position in response to a select operation by a driver. The controller is configured to, when a first select operation from a first travel range position to a non-travel range position is performed, perform pressure release control that decreases at a prescribed descending gradient an engagement capacity of a starting clutch that is engaged in the first travel range position. The controller has a select hydraulic pressure control unit configured to continue the pressure release control during a second select operation from a second travel range position that is different from the first travel range position to the non-travel range position after the first select operation.

Abstract: A motion conversion apparatus (400, 500) comprises at least one set including a rodrack assembly (110) between two gearshaft member end sections (155), and a gearshaft member mid section (156) between the two gearshaft member end sections (155). The rodrack assembly (110) comprises a first gear connection member (120) and two guide members (140). The gearshaft member mid section (156) comprises a second gear connection member (160) configured to engage with the first gear connection member (120). The two gearshaft member end sections (155) each comprise a guiding surface arrangement (170) configured to contact the two guide members (140). The rodrack assembly (110) is configured to provide rotation of the gearshaft member mid section (156) about a rotational axis (A) by reciprocating linear motion of the rodrack assembly (110) along a first spatial dimension (D1) orthogonal to the rotational axis (A), or vice versa.