STRAIN WAVE GEARING WITH FULL SEPARATION OF TWO STRESSES
Granted: January 3, 2019
Application Number:
20190003569
In a strain wave gearing, the addendum tooth profile of an internal gear is defined by the formula a and that of an external gear is by the formula b at a principal cross-section located at a tooth-trace-direction center of the external gear, on the basis of a movement locus (Mc) of ?=1 of the teeth of the external gear with respect to those of the internal gear in the principle cross-section taken at the center of the tooth trace of the external gear obtained when the tooth meshing is…
CROSSED ROLLER BEARING
Granted: January 3, 2019
Application Number:
20190003525
The roller insertion groove of the inner ring of a crossed roller bearing is provided with an outer circumferential surface-side groove opening that is exposed to an inner rings-side V-groove. The groove opening is defined by circumferential direction opening edge that extends in the circumferential direction along the inner ring-side V-groove and side opening edges that extend from both ends of the circumferential direction opening to the ring-shaped end face of the inner ring.…
FLAT STRAIN WAVE GEARING
Granted: December 20, 2018
Application Number:
20180363750
A restraint mechanism for limiting the movement of the flexible external gear of a flat strain wave gearing in the axial direction has a first restraining member installed in a floating state in a first recess and a second restraining member installed in a floating state in a second recess. The restraining member is able to limit the movement of the flexible external gear in the axial direction to a range in which there are no difficulties during actual use. Moreover, compared with when…
SHAFT COUPLING
Granted: December 13, 2018
Application Number:
20180355898
A slotted-type rigid coupling is manufactured so that the internal-diameter dimension of a first shaft hole of a circumferentially divided shaft-fastening part is the same as that of a shaft. The first shaft hole is widened by widening force from a pressing mechanism provided with a fastening bolt, and the shaft is inserted through the first shaft hole up to a shaft insertion hole. The widening force is ceased, the first shaft hole is narrowed by fastening force from the pressing…
STRAIN WAVE GEARING WITH FULL SEPARATION OF TWO STRESSES
Granted: December 6, 2018
Application Number:
20180347679
In a strain wave gearing, the addendum tooth profile of an internal gear is defined by the formula a and that of an external gear is by the formula b at a principal cross-section located at a tooth-trace-direction center of the external gear, on the basis of a movement locus (Mc) of ?=1 by the teeth of the external gear with respect to those of the internal gear. It is possible to avoid superimposition of flexion-induced bending stresses and tensile stresses caused by load torque at the…
STRAIN WAVE GEARING
Granted: November 8, 2018
Application Number:
20180320770
A foreign-matter intrusion preventing mechanism of a strain wave gearing is provided with a filter attachment plate attached to a wave generator plug and a filter attached to the ellipsoidal outer peripheral surface of the filter mounting plate. Lubricant flows, via the filter, between a wave generator bearing and a meshing portion between an external gear and an internal gear. Foreign matters included in the lubricant are captured by the filter. Because the filter is in contact with the…
FLEXIBLE EXTERNAL GEAR AND STRAIN WAVE GEARING
Granted: October 25, 2018
Application Number:
20180306276
The flexible external gear of a strain wave gearing is provided with: a cylindrical body part capable of flexing in the radial direction; external teeth formed on the outer circumferential surface thereof with a constant pitch; and grooves formed on the inner circumferential surface of the cylindrical body section along the circumferential direction thereof with the same pitch as the external teeth. The grooves are grooves with a wave-shaped cross-sectional shape having the center line…
SLIDING CONTACT-TYPE WAVE GENERATOR AND STRAIN WAVE GEARING
Granted: September 13, 2018
Application Number:
20180259054
A wave generator for a strain wave gearing is provided with a rigid plug having an ellipsoidal plug-outer-circumferential surface, and a ring-shaped displacement body that is flexed to an ellipsoidal shape by the plug. The ring-shaped displacement body is provided with a plurality of radially arranged displacing sections. The plug-contacting surfaces of the displacing sections are in sliding contact with the plug-outer-circumferential surface and when the plug rotates, the displacing…
TWO STRESS-SEPARATION STRAIN WAVE GEARING
Granted: September 13, 2018
Application Number:
20180259053
In a strain wave gearing, the addendum tooth profile of an inner gear is defined by a formula and that of an outer gear is by another formula at a principal cross-section located at a tooth-trace-direction center of the outer gear, on the basis of a movement locus (Mc) of ?=1 by the teeth of the outer gear with respect to those of the inner gear. The tooth profiles of the dedenda of each of the inner gear and the outer gear are set to any shape that does not interfere with the tooth…
POSITIONING CONTROL DEVICE FOR ACTUATOR PROVIDED WITH STRAIN WAVE GEARING USING FULL-CLOSED CONTROL WITH STATE OBSERVER
Granted: August 30, 2018
Application Number:
20180246489
A positioning control system is provided with a state-feedback control system with a state observer as a full-closed control system for driving and controlling a motor so that a load shaft, which is an output shaft of a strain wave gearing, is positioned at a target position on the basis of a load shaft position actually detected. The state observer estimates a motor shaft position and a motor velocity based on a control input for the motor and the load shaft position. The state-feedback…
WAVE GENERATOR FOR STRAIN WAVE GEARING
Granted: August 30, 2018
Application Number:
20180245678
A wave generator for a strain wave gearing makes a flexible externally toothed gear to flex into an elliptical shape and mesh with rigid internally toothed gears, and makes meshing positions of the flexible externally toothed gear with the both gears to move in a circumferential direction. On the inner side of a rigid plug of the wave generator, a plug support ring is secured and integrated. The rigid plug is formed from an iron-based material, and the plug support ring is formed from a…
POSITIONING CONTROL DEVICE OF ACTUATOR PROVIDED WITH STRAIN WAVE GEARING USING H-INFINITY CONTROL
Granted: August 23, 2018
Application Number:
20180239327
A positioning control device of an actuator provided with a strain wave gearing has a full-closed control system for feeding back a position of a load shaft, and driving and controlling a motor so as to position the load shaft at a target position. The full-closed control system has an H? compensator designed so that, when a generalized plant having angular transmission error in the strain wave gearing as a disturbance input is assumed, an H? norm of a transfer function from the…
VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSTION ENGINE
Granted: July 12, 2018
Application Number:
20180195433
Disclosed is a variable compression ration mechanism in which a control shaft is rotated and driven by an electric motor through a wave gear reducer. The wave gear reducer includes: a first internal gear member; an external gear member arranged concentrically inside the internal gear member; a wave generator arranged inside the external gear member; and a second internal gear member, wherein a ratio of the number of teeth of a fixed gear portion of the first internal gear member to the…
STRAIN WAVE GEARING AND WAVE GENERATOR
Granted: July 5, 2018
Application Number:
20180187764
A wave generator of a flat-type strain wave gearing has an insertion member disposed between two wave bearings. The insertion member is pressed into an elliptical outer peripheral surface of a plug and is fixed thereto by an adhesive. An inner ring contact part of the insertion member is in contact with inner rings of the wave bearings from the direction of a center axis. When the flat-type strain wave gearing is in an operating state, the wave bearings can be prevented from moving…
ROTATION TRANSMISSION MECHANISM PROVIDED WITH STRAIN WAVE GEARING
Granted: June 28, 2018
Application Number:
20180180146
In a rotation transmission mechanism that transmits the rotational driving force of a motor to a load-side member via a speed reducer, a strain wave gearing is used as the speed reducer, and the allowable load torque of members in the powertrain other than the strain wave gearing is greater than a predetermined upper-limit load torque. The allowable load torque of the strain wave gearing is dictated by the ratcheting torque, which is set so as not to exceed the upper-limit load torque.…
VARIABLE COMPRESSION RATIO MECHANISM FOR INTERNAL COMBUSTION ENGINE
Granted: June 14, 2018
Application Number:
20180163622
Disclosed is a variable compression ration mechanism in which a control shaft is rotated and driven by an electric motor through a wave gear reducer. The wave gear reducer includes: a first internal gear member; an external gear member arranged concentrically inside the internal gear member; a wave generator having an oval outer shape and arranged inside the external gear member; and a second internal gear member, wherein a ratio of the number of teeth of a fixed gear portion of the…
PLANETARY GEAR DEVICE SERIES
Granted: June 7, 2018
Application Number:
20180156313
In a planetary gear device series composed of eight kinds of planetary gear devices with gear reduction ratios of 3 to 10, the planetary gear device of each gear reduction ratio uses an internal gear with 108 teeth or a slightly different number of teeth, and the module is common among the planetary gear devices of all gear reduction ratios. The combinations of the sun gear teeth number Za and the internal gear teeth number Zc in the planetary gear device of each reduction ratio are…
STRAIN WAVE GEARING WITH COMPOUND MESHING THAT INVOLVES CONGRUITY OF TOOTH SURFACES
Granted: May 31, 2018
Application Number:
20180149255
The dedendum tooth profiles of the internal teeth and external teeth of a strain wave gearing are prescribed by a first homothetic curve BC and a second homothetic curve AC obtained from a curve segment from a point A, at which the angle formed by the tangent to a movement locus Mc when meshing is approximated by rack meshing and the major axis is ?A, to a low point B. The dedendum tooth profile of the internal teeth is prescribed by a curve formed on the internal teeth in the course of…
STATIC PRESSURE SEAL-EQUIPPED MOTOR
Granted: April 26, 2018
Application Number:
20180112709
A static pressure seal-equipped motor (1) in which front and rear gaps are sealed by first and second static pressure seal portions (30, 40) disposed at first and second axial end portions (12a, 12c) of a motor rotating shaft (12) protruding toward front and rear. Sealing gas supplied to sealing gaps (32, 42) of the first and second static pressure seal portions (30, 40) is caused to diverge and flow to chemical liquid atmospheres (5a, 5b) and a motor chamber (18) or an encoder chamber…
TRANSMISSION COMPONENT SET HAVING AN OUTPUT BEARING AND A HARMONIC DRIVE TRANSMISSION WHICH CAN BE MOUNTED THEREON
Granted: February 22, 2018
Application Number:
20180051789
A transmission component set has a bearing ring (1) and a strain wave gear mounted thereon. Said strain wave gear comprises an input or drive component (2), a flexible or resilient transmission component (4) having external teeth (3), and a gear (6) having an internal teeth (5). The transmission component (4) is fitted onto the drive component (2) and thereby is elliptically deformable such that the external teeth (3) of the transmission component (4) engage with the internal teeth (5)…
