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)…
STRAIN WAVE GEARING AND WAVE GENERATOR
Granted: February 1, 2018
Application Number:
20180031103
A wave generator of a strain wave gearing uses a plurality of solid displacement elements to flex a flexible externally toothed gear into a non-circular shape and partially mesh the externally toothed with a rigid internally toothed gear. The solid displacement elements are obtained by curving a monomorphic or bimorphic type rectangular plate-shaped element into an arc shape and can be deformed from an arc shape to a semispherical shape by energization, the semicircular shape having a…
WAVE GENERATOR AND STRAIN WAVE GEARING
Granted: January 25, 2018
Application Number:
20180023678
A strain wave gearing has a wave generator provided with a plug and a roller bearing. The roller bearing is provided with flange plates fixed to both sides of the plug, and outer circumferential edge portions of the flange plates protrude outwardly from a plug outer circumferential surface so as to locate on both sides, in an axial line direction, of the raceway of rollers. The movements of the rollers in the axial line direction are constrained by the outer circumferential edge…
STRAIN WAVE GEARING
Granted: December 28, 2017
Application Number:
20170370457
An internal contact part of a wave generator of a strain wave gearing, a contact part between an externally toothed gear and the wave generator, and tooth surface parts are lubricated by a lubricating fine powder. When the strain wave gearing is in operation, the lubricating fine powder is supplied to the internal contact part and the contact part by a first powder guide that rotates integrally with the wave generator. Having passed through these sections, the lubricating fine powder is…
STRAIN WAVE GEARING DEVICE
Granted: December 7, 2017
Application Number:
20170350497
A strain wave gearing device has a grease temperature control mechanism for controlling the grease temperature of a portion of grease, of the grease filled inside an externally toothed gear of the strain wave gearing device, the portion of the grease being disposed on the outer peripheral side portion of a wave generator. The grease temperature control mechanism has a circular heater facing the outer peripheral side portion of the wave generator over the entire circumference from a…
STRAIN WAVE GEARING WITH BUILT-IN MOTOR
Granted: November 23, 2017
Application Number:
20170338718
A strain wave gearing with a built-in motor is provided with a motor, a wave gear mechanism enclosing the motor coaxially, and a heat-insulation spacing formed therebetween. The wave gear mechanism has a wave generator attached to the motor rotor so as to rotate integrally with the motor rotor. A wave generator plug of the wave generator is fixed to a rotor magnet back yoke of the motor rotor so as to enclose the rotor magnet back yoke. The spacing is formed in a contact surface portion…
FASTENING STRUCTURE FOR FLEXIBLE EXTERNALLY TOOTHED GEAR OF STRAIN WAVE GEARING AND SHAFT MEMBER
Granted: November 23, 2017
Application Number:
20170335941
A boss-side fastening surface formed in a boss of a flexible externally toothed gear of a strain wave gearing and a shaft-side fastening surface of an output shaft are coaxially fastened with bolts. The boss-side fastening surface is a convex-side fastening surface defined by two symmetrical inclined surfaces that are intersected at a prescribed angle to form a ridge line on a diameter line of the surface. The shaft-side fastening surface is a concave-side fastening surface defined by…
PLANETARY GEAR DRIVE
Granted: November 2, 2017
Application Number:
20170314671
A planetary gear drive has needle roller bearings of full roller type as planetary gear bearings for planetary gears. The needle roller bearings have lubrication mechanisms, respectively. Each lubrication mechanism has an annular grease retaining groove. The grease retaining groove is formed on an inner peripheral surface (an outer-race-side raceway surface) of the shaft hole of each planetary gear. Poor lubrication can be prevented from occurring when needle roller bearings of full…
METHOD FOR LUBRICATING STRAIN WAVE GEARING
Granted: September 7, 2017
Application Number:
20170254404
A strain wave gearing has contact parts which are the portions to be lubricated other than the teeth of an externally toothed gear and an internally toothed gear, the contact parts being respectively lubricated with an inorganic lubricating powder having a lamellar crystal structure. The lubricating powder, during the operation of the strain wave gearing, is crushed between the contact surfaces of each of the contact parts to move and adhere to the contact surfaces, thereby forming thin…
WAVE GENERATOR AND STRAIN WAVE GEARING
Granted: September 7, 2017
Application Number:
20170254403
A wave generator of a strain wave gearing has a rigid plug provided with an elliptical outer peripheral surface, and a roller bearing. The outer peripheral surface of the plug is provided with a major-axis-side outer-peripheral surface portion formed at a major axis position L1, and a minor-axis-side outer-peripheral surface portion formed at a minor axis position L2. The major-axis-side outer-peripheral surface portion is a tapered surface that is tapered along a center axis line, and…
CUP-SHAPED FLEXIBLE EXTERNALLY TOOTHED GEAR AND CUP-TYPE STRAIN WAVE GEARING
Granted: August 10, 2017
Application Number:
20170227106
In the cup-shaped externally toothed gear, the outside end face profile of the diaphragm is defined by a first concave circular arc having a first radius, a second concave circular arc that has a second radius and is smoothly connected to the first concave circular arc, an inclined straight line that is smoothly connected to the second concave circular arc and is inclined toward an inside straight line with respect to the center axis line, the inside straight line defining the outside…
PLANETARY REDUCTION GEAR DEVICE
Granted: August 10, 2017
Application Number:
20170227091
A planetary reduction gear device has first and second planetary gears meshed with a sun gear and an internal at different locations in a direction of an axis line; and a carrier assembly for supporting the first and second planetary gears. The carrier assembly has a first planetary carrier for supporting the first planetary gears and a second planetary carrier for supporting the second planetary gears. The first and second planetary carriers are fixed coaxially with each other in the…
ROTARY ACTUATOR
Granted: August 3, 2017
Application Number:
20170222517
The rotary actuator has an outer rotor type motor assembled coaxially in a device hollow part of a strain wave gearing. One end of the device hollow part is closed by an end cover fixed to an output shaft of the strain wave gearing. A detection part is arranged between the motor and the end cover inside the device hollow part. A rotational position of a rotation detection plate mounted on an inside end surface of the end cover is detected by the detection part, to detect the rotational…
FLAT STRAIN WAVE GEARING
Granted: August 3, 2017
Application Number:
20170219050
A relieving portion is formed between a first external tooth portion and a second external tooth portion in the external teeth of a flexible externally toothed gear of a flat strain wave gearing. The length L1 of the relieving portion in the tooth trace direction is within the range of 0.1 to 0.5 of the tooth width L of the external teeth. The maximum relieving amount t from the tooth top land of an external tooth in the relieving portion is 3.3×10?4<t/PCD<6.3×10?4 where the PCT…
DUAL-TYPE STRAIN WAVE GEARING
Granted: July 27, 2017
Application Number:
20170211679
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers, and is flexed into an ellipsoidal shape by a wave generator. When the theoretical values of the radial flexing amounts at major-axis positions of the first and second external teeth flexed into the ellipsoidal shape are expressed by d1=m1n1 and d2=m2n2 (m1 and m2 represent the modules of the first and second external teeth, and n1 and n2 represent…
DUAL-TYPE STRAIN WAVE GEARING
Granted: July 27, 2017
Application Number:
20170211678
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers. The first and second external teeth are flexed by a wave generator by the same flexing amount, into an ellipsoidal shape. The tooth depth of tooth profiles of the first external teeth having a low teeth number is smaller than the tooth depth of tooth profiles of the second external teeth having a high teeth number. A dual-type strain wave gearing…
DUAL-TYPE STRAIN WAVE GEARING
Granted: July 27, 2017
Application Number:
20170211677
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different tooth numbers, and is flexed into an ellipsoidal shape by a wave generator. When the theoretical values of the radial flexing amounts at major-axis positions of the first and second external teeth flexed into the ellipsoidal shape are expressed by d1=m1n1 and d2=m2n2 (m1 and m2 represent the modules of the first and second external teeth, and n1 and n2 represent…
DUAL-TYPE STRAIN WAVE GEARING
Granted: July 13, 2017
Application Number:
20170198802
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers. The first and second external teeth are flexed by a wave generator by the same flexing amount, into an ellipsoidal shape. The average pressure angle of main-tooth-surface sections of tooth profiles of the first external teeth having a low teeth number is less acute than the average pressure angle of main-tooth-surface sections of tooth profiles of…
