WAVE GEAR DEVICE
Granted: March 11, 2021
Application Number:
20210071745
A wave gear device includes a circular spline that has an annular shape and rigidity; a flex spline that has an annular shape and flexibility, and is disposed in the circular spline; and a wave generator that is disposed in the flex spline, is configured to cause the flex spline to be distorted in a radial direction and is configured to partially mesh with the circular spline, and is configured to move a meshing position between the circular spline and the flex spline in a…
ROTATION TRANSMISSION MECHANISM PROVIDED WITH STRAIN WAVE GEARING
Granted: February 4, 2021
Application Number:
20210033178
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.…
ROTATION TRANSMISSION MECHANISM PROVIDED WITH STRAIN WAVE GEARING
Granted: February 4, 2021
Application Number:
20210033177
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.…
STRAIN WAVE GEARING
Granted: January 21, 2021
Application Number:
20210018081
A strain wave gearing has a cup-shaped externally toothed gear that is provided with a body formed with external teeth, a diaphragm extending from an end of the body, and a rigid boss integrally formed in the diaphragm. The ratio B/A is set equal to or less than 0.59 where A is the reference pitch circle diameter of the external teeth and B is the outer diameter of the boss. The radial length from the inner peripheral edge of the diaphragm to the outer peripheral edge thereof in the…
UNIT-TYPE STRAIN WAVE GEARING
Granted: September 10, 2020
Application Number:
20200284333
In a unit-type strain wave gearing, a rotating-side member, which is constituted by a second internally toothed gear and an output shaft is supported, via a first sliding bearing and a second sliding bearing, on a fixed-side member so as to be capable of relative rotation, the fixed-side member being constituted by a unit housing and a first internally toothed gear. Sliding bearing surfaces of the first sliding bearing and sliding bearing surfaces of the second sliding bearing are…
WAVE GENERATOR AND STRAIN WAVE GEARING
Granted: September 10, 2020
Application Number:
20200284332
A wave bearing of a wave generator of a strain wave gearing is provided with steel or stainless steel cylindrical hollow rollers between an inner-race-side raceway surface and an outer-race-side raceway surface, the hollow rollers serving as rolling elements. The ratio Di/Do of the inner diameter Di to the outer diameter Do of the hollow rollers is set to 0.95 or more. The relative radius of curvature of hollow rollers that have been flexed into an ellipsoidal shape increases with…
STRAIN WAVE GEARING HAVING UNIT STRUCTURE
Granted: July 30, 2020
Application Number:
20200240500
A cup-type strain wave gearing having a unit structure and having: a stationary-side part including a unit housing and an internally toothed gear; a driving-side part including an output member and an externally toothed gear; and a sliding bearing supporting the stationary-side part and the driving-side part in the radial direction and the thrust direction in a state in which relative rotation is possible. The sliding bearing has a cylindrical bushing accommodated in a radial gap, and…
STRAIN WAVE GEARING PROVIDED WITH LUBRICANT-MIXING-PREVENTION PART
Granted: July 23, 2020
Application Number:
20200232549
A cup-shaped strain wave gearing has an externally toothed gear formed with a cylindrical extension portion extending from an end of an external tooth forming portion of the externally toothed gear. A space between the external peripheral surface of the cylindrical extension portion and an end face of an internally toothed gear is sealed by an oil seal. A space between an outer-side lubrication portion on the outer side of the externally toothed gear and an inner-side lubrication portion…
WAVE BEARING FOR STRAIN WAVE GEARING
Granted: June 4, 2020
Application Number:
20200173532
A strain wave gearing has a wave generator that is provided with a rigid cam plate and a wave bearing. The wave bearing is mounted between the elliptical outer peripheral surface of the rigid cam plate and the inner peripheral surface of an externally toothed gear so as to support the rigid cam plate and the externally toothed gear in a relatively rotatable state. The wave bearing is a full complement ball bearing provided with inner and outer races which are flexible in a radial…
STRAIN WAVE GEARING
Granted: May 21, 2020
Application Number:
20200158220
A strain wave gearing has a rigid internally toothed gear, a flexible externally toothed gear, and a sliding-contact type wave generator. The wave generator has: a plurality of gear pressing members that flexes the externally toothed gear in the radial direction at positions at equal angular intervals in the circumferential direction to form plurality of meshing portions which mesh with the internally toothed gear; and piezoelectric elements that generate ultrasonic vibration of 20 kHz…
SILK HAT-TYPE STRAIN WAVE GEAR DEVICE
Granted: March 5, 2020
Application Number:
20200072338
A silk hat-type strain wave gear device has a crossed roller bearing for supporting an internal gear and an external gear so as to allow relative rotation. A first gap part between the inner and outer rings of said bearing is sealed by an oil seal and a second gap part thereof is in communication with a gear-side gap part on the outside of the external gear. A bearing seal separates the second gap part from the gear-side gap part. The bearing seal prevents excessive inflow of lubricant…
DUAL-TYPE STRAIN WAVE GEARING
Granted: February 20, 2020
Application Number:
20200056653
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. Where L1 is the maximum width of the gap, t1 is a depth from the tooth top land of the first external teeth to the deepest part of the gap, h1 is the tooth depth of the first external teeth, t2 is a depth from the tooth top land of the second external teeth to the…
ROTARY ACTUATOR AND LINEAR ACTUATOR
Granted: February 13, 2020
Application Number:
20200049237
A rotary actuator has a hollow motor and hollow reduction gears arranged coaxially on either side of the hollow motor. A rotary shaft is arranged so as to pass through a hollow motor shaft of the hollow motor. The hollow reduction gears have hollow input shafts connected to the shaft ends on either sides of the hollow motor shaft. The hollow reduction gears have hollow output shafts connected to sections of the rotary shaft protruding from both ends of the hollow motor shaft. The…
STRAIN WAVE GEARING AND WAVE GENERATOR
Granted: February 6, 2020
Application Number:
20200040978
A wave generator of a wave gear device flexes an externally toothed gear into a shape along an elliptical closed curve to form engaging portions of the externally toothed gear with an internally toothed gear at two places, namely at both ends of the major axis, and to move the engaging portions in the circumferential direction. The elliptical closed curve has a non-point symmetric shape. For example, the elliptical closed curve is a line symmetric closed curve that is not symmetric about…
STRAIN WAVE GEARING
Granted: January 30, 2020
Application Number:
20200032891
In a strain wave gearing, a flexible externally toothed gear flexed by a wave generator meshes with a flexible internally toothed gear while in an overlapping meshing state. A floating ring, which supports the internally toothed gear from the outer circumferential side, maintains the overlapping state of the meshing and supports the internally toothed gear in a floating state that allows displacement following a state of radial flexion in the tooth trace direction of the internal teeth…
STRAIN WAVE GEAR MECHANISM WITH AN INNER SEAL
Granted: January 2, 2020
Application Number:
20200003288
A strain wave gear mechanism (1) has a gear mechanism component (CS) and an elastically deformable transmission component (FS) that is at least partially in alignment therewith in the radial direction (29) and can be deformed elliptically by way of a drive component (WG). Internal or external toothing systems (8, 9) on the gear mechanism component (CS) and the transmission component (FS) are brought into engagement in opposite regions of an elliptical axis to rotate the transmission…
SEAL STRUCTURE WITH O-RING
Granted: December 5, 2019
Application Number:
20190368610
A mounting groove of a seal structure using an O-ring is defined by: a groove bottom surface; an acute-angle-side groove side surface inclined at an acute angle contiguously to the radially inner edge of the groove bottom surface; and an obtuse-angle-side groove side surface inclined at an obtuse angle contiguously to the radially outer edge of the groove bottom surface. The O-ring is mounted in a state of being pushed and expanded to the acute-angle-side groove side surface. The O-ring…
STRAIN WAVE GEARING HAVING 3-DIMENSIONAL MESHING TOOTH PROFILE
Granted: December 5, 2019
Application Number:
20190368576
A strain wave gearing wherein the tooth profile of an external teeth of a cup-shaped or silk-hat-shaped external gear is set as follows. The tooth-tip tooth thickness decreases gradually from an external-teeth outer end toward an external-teeth inner end along an external tooth trace direction. In addition, a pressure angle at a pitch point (P) increases gradually from the external-teeth outer end toward the external-teeth inner end along the external tooth trace direction. Thus, it is…
CUP-TYPE STRAIN WAVE GEARING
Granted: November 21, 2019
Application Number:
20190353236
A strain wave gearing has a rigid internally toothed gear, a flexible externally toothed gear, and a wave generator. Before being flexed by the wave generator, the externally toothed gear has a cylindrical body part, an inside diameter of which is such that the inside diameter D is smallest at a rear end thereof and increases gradually from the rear end to an opening end thereof. After being flexed by the wave generator, D1?D is satisfied where D1 is the minor diameter of an elliptical…
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…
