A driving apparatus has a problem in that during the maintenance operation, foreign matter moves from the tip end side of an input shaft into a hollow space. Therefore, a driving apparatus includes an input shaft with a hollow space formed therein, the hollow space penetrating therethrough in the axial direction, a motor that rotates the input shaft, a reduction gear that receives the power of the motor 1 from the input shaft, an output shaft inserted through the hollow space of the input shaft and adapted to rotate about the rotation axis with power output from the reduction gear, and a detector that detects information on the rotation of the input shaft and the output shaft. A limiting member, which limits the movement of foreign matter into the hollow space of the input shaft from one side to the other side of the motor, is arranged in the hollow space between the input shaft and the output shaft.

A gear is provided that has excellent continuous moldability for practical use, and both high slidability and high durability. The provided gear is a molded resin constructed of a resin composition comprising a thermoplastic resin (A) and cellulose nanofibers (B) with an average fiber diameter of 1000 nm or smaller, and having a number average molecular weight of the thermoplastic resin (A) in the range of 10,000 to 150,000, wherein a sliding surface of the gear with another gear teeth has an arithmetic mean surface roughness Sa of 3.0 μm or lower.

A good-orientation, low-drift micro-movement subassembly for angle adjustment as a precise driving screw for angle adjustment, comprising a slotted knurling handle, a turnbuckle and a central cylindrical shaft. The invention is precise for linear displacement, good orientation, low-drift, stable and reliable adjustment, which can be used for a variety of precision-oriented, small drift, precision micro-angle adjustment of the drive screw.

A robot includes a gear device. The gear device includes an internal gear including internal teeth and an external gear including external teeth, which partially mesh with the internal gear, and having flexibility, the external gear relatively rotating around a rotation axis with respect to the internal gear, and a wave motion generator configured to come into contact with an inner circumferential surface of the external gear and move a meshing position of the internal gear and the external gear in a circumferential direction around the rotation axis. The gear device includes a wall section disposed at an end portion of tooth width of the internal gear and coupled to two dedenda adjacent to each other in the circumferential direction of the internal gear and a tooth bottom present between the two dedenda.

When a strain wave gearing is used in an application for an operation of repeating startup/stopping, an outer-side lubrication portion and an inner-side lubrication portion, which are lubricated using different types of grease, remain in a communicating state without being divided using a seal member or the like. The outer-side lubrication portion is supplied with a much smaller amount of grease than the amount that would be required if used in an application such as a steady operation. Similarly, the inner-side lubrication portion is also supplied with a much smaller amount of grease than the amount that would be required if used in an application such as a steady operation. Essentially, the outer-side lubrication portion and the inner-side lubrication portion can be lubricated appropriately using different types of grease, without the grease becoming mixed.

A torque load binder for changing tension in a chain or strap securing a load to a vehicle or support surface. The load binder includes a housing with an internal gear mechanism and a connector mechanism operatively engaged with the gear mechanism and extending outwardly from the housing. A high speed first driveshaft and a lower speed second driveshaft on the load binder are selectively individually actuated to effect movement between first and second end linkages of the connector mechanism. The first driveshaft effects movement between the first and second end linkages at a first speed and the second driveshaft effects movement between the end linkages at a lower second speed. Rotation of either of the first or second driveshafts actuates the connector mechanism, changing the distance between the first and second end linkages, and thereby changing the tension in the tie-down.

A gear device includes an internal gear, an external gear having flexibility configured to partially mesh with the internal gear and rotate, and a wave generator provided on an inner side of the external gear and configured to move a meshing position of the internal gear and the external gear in a circumferential direction around the rotation axis. A main material of the internal gear includes graphite particles. A tooth surface of an internal tooth of the internal gear has a convex pattern including a first convex part and a second convex part extending in a first direction having a component along the rotation axis and arranged side by side in a second direction crossing the first direction, and 10≤D≤40 and S−D≤20, wherein D [μm] is an average particle diameter of the graphite particles and S [μm] is a separation distance between the first convex part and the second convex part in the second direction.

An acuator for a shift-by-wire system includes a druve motor installed inside a motor housing, the drive motor having a drive shaft, and a decelerator inside a decelerator housing coupled with the motor housing, the decelerator coupled to the drive shaft. The decelerator includes a sun gear connected to a first side of an eccentric part of the drive shaft, a ring gear engaged with the sun gear and fixed to the decelerator housing, an output shaft connected to a second side of the eccentric part, a first bearing coupled to one side of the eccentric part and supporting the sun gear, a second bearing coupled to the other side of the eccentric part and supporting the output shaft, and a power delivery unit coupled to the sun gear and the output shaft in a center region between the first and second bearings.

A gear mechanism includes: at least one gear including a rotation shaft; and at least one bearing portion. The at least one gear can meshingly engage with another gear that applies a force to the at least one gear. The at least one bearing portion includes: a collar portion supporting the rotation shaft; and a notched portion exposing a portion of the rotation shaft to an outside. A first imaginary plane defines a first region and a second region of the at least one bearing portion. The first imaginary plane extends in an axial direction and contains a first linear line passing through a center of the rotation shaft and perpendicular to a direction of a line of action of the force. The first region is positioned downstream of the first linear line in the direction of the line of action. The notched portion is formed in the second region.

A reduction in the amount of filled grease and a reduction in weight are achieved, and an excessive rise in the internal pressure is suppressed. Provided is a gearbox including: a plurality of gears that are rotated by a motor; a housing that has a sealed interior space for rotatably accommodating the respective gears; and a spacer that is disposed in the interior space of the housing and that partially occupies the interior space, wherein the spacer has a lower density than grease and is elastically deformable so as to change the volume thereof according to the internal pressure of the interior space.