ROTATION DETECTING DEVICE AND HOLLOW ACTUATOR
Granted: October 3, 2019
Application Number:
20190301898
A hollow type rotation detecting device has a 2-pole magnet ring and a multi-pole gear, the 2-pole magnet being coaxially fixed to the outer circumferential surface of the shaft end part of a hollow motor shaft that extends coaxially inside a cylindrical cover. In an annular gap between the cylindrical cover and the 2-pole magnet ring and multi-pole gear, rigid boards are arranged with an orientation facing in a tangential direction at prescribed intervals along the circumferential…
EXTERNALLY TOOTHED GEAR FOR STRAIN WAVE GEARING
Granted: September 12, 2019
Application Number:
20190277383
In a silk hat-shaped external gear for a strain wave gearing, t(A)>t(C)>t(D)>t(B) is satisfied, where the thicknesses of the inner circumferential end (A), the middle part (B) and the outer circumferential end (C) of the diaphragm body portion of a diaphragm are t(A), t(B) and t(C), and where the thickness of the barrel-side end part (D) of the curved portion of the diaphragm is t(D). With reference to the thickness of the middle part (B), the thickness of the inner…
MAGNETIC TYPE ROTATION TRANSMITTING MECHANISM
Granted: August 1, 2019
Application Number:
20190234504
A magnetic type rotation transmitting mechanism has a rotating plate made of a magnetic material, and a magnet to which the rotational movement of the rotating plate is transmitted through a magnetic coupling between the magnet and the rotating plate. When the rotating plate is rotated, a plurality of oblique edge portions formed on the outer peripheral edge of the rotating plate rotate while sequentially passing through a magnet-facing area. The oblique edge portions move in the…
WAVE GENERATOR AND STRAIN WAVE GEARING
Granted: August 1, 2019
Application Number:
20190234502
A wave generator of a strain wave gearing is provided with a rigid plug, a wave bearing mounted to the ellipsoidal outer peripheral surface of the rigid plug, and four elastic claws that rotate integrally with the rigid plug. The balls of the wave bearing include balls in a loose state and balls in a tight state. The loose-state balls adjacent to the tight-state balls are applied with braking force by the elastic claws immediately before they transition into a tight state, and the…
DUAL-TYPE STRAIN WAVE GEARING
Granted: July 4, 2019
Application Number:
20190203819
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers, and a gap formed between these teeth as a cutter clearance area for tooth cutters. The maximum width L1 of the gap is 0.1 to 0.3 times the width L of the externally toothed gear. The depth from the tooth top land of the first external teeth to the deepest part of the gap is 0.9 to 1.3 times the depth of the first external teeth, and the depth from…
ROTARY ACTUATOR PROVIDED WITH STRAIN WAVE REDUCTION GEARS
Granted: April 18, 2019
Application Number:
20190113106
A rotary actuator has: one motor, two strain wave reduction gears disposed symmetrically on both sides of the motor, and one output shaft. The output rotation of the motor is reduced in speed at the same reduction ratio by the two strain wave reduction gears and is outputted from the output shaft to a load side. The first and second externally toothed gears of the first and second strain wave reduction gears are flexed into ellipsoidal shapes with 90 degrees shifted in phase, and are…
SLIDING CONTACT-TYPE WAVE GENERATOR, STRAIN WAVE GEARING, AND WAVE-GENERATING METHOD
Granted: March 21, 2019
Application Number:
20190085962
The wave generator of a strain wave gearing is provided with an ellipsoidally contoured wave generator plug and a wave generator bearing. The wave generator bearing is provided with an annular body fitted between inner and outer races in a sliding contact state. The annular body is composed of an endless coil spring and has a rigidity that is able to maintain a constant gap between the inner and outer races. The annular body also has a specified overall flexibility in the radial…
MOVABLE COIL TYPE LINEAR MOTOR
Granted: February 28, 2019
Application Number:
20190068043
A linear motor includes a motor movable body which has symmetrical structure with respect to a vertical plane and a horizontal plane that include the motor center axis line. Two linear bearings disposed in a space on the inner side of a rectangular tubular movable coil of the motor movable body are disposed symmetrically to the left and right of the center axis line so that the bearing support center coincides with the motor center axis line. Thrust generation sections of the motor…
Combined Cylindrical Roller Bearing
Granted: February 21, 2019
Application Number:
20190055985
A combined cylindrical roller bearing is provided with first and second angular cylindrical roller bearings coaxially disposed in parallel, and a shim plate sandwiched between first and second inner races of these angular cylindrical roller bearings. A gap between the first and second inner races is adjusted by the shim plate. First and second cylindrical rollers do not have the relative positions thereof restricted in the direction of the bearing center axis line thereof. Pressurization…
SLIDING BEARING
Granted: February 14, 2019
Application Number:
20190048925
A sliding bearing has an outer ring, an inner ring, an annular-shaped raceway formed between the two rings, and a sliding body mounted on the raceway. The raceway has rectangular cross-section or a rhomboid cross-section formed from an outer-ring-side V groove and an inner-ring-side V groove. The sliding body is, for example, formed of an endless coil spring, and the outer peripheral surface of the circular contour thereof is in contact in a four-point contact state with four first…
STRAIN WAVE GEARING AND ACTUATOR
Granted: January 17, 2019
Application Number:
20190017585
A strain wave gearing has a wave generator for generating a wave motion that repeatedly flexes each part in the circumferential direction of an externally toothed gear in the radial direction. The wave generator is provided with a plurality of wave-generating members arranged at positions at a prescribed angular interval along the circumferential direction of the externally toothed gear. Each of the wave-generating members is provided with an outer circumferential cam surface, rotates…
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…
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…
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…
