Method For Setting Gear Tooth Profile In Flat Wave Gear Device On Side Where Gears Have Same Number Of teeth
Granted: June 4, 2009
Application Number:
20090139358
In a flat wave gear device in which a flexible externally toothed gear and the rigid internally toothed gear have the same number of teeth, an arcuate tooth profile is imparted to a flexible externally toothed gear, a contact point C between tooth profiles of a flexible externally toothed gear and a D-side rigid internally toothed gear is determined from an arc center A of the arcuate tooth profile of the flexible externally toothed gear and from a momentary center S of relative movement…
Method For Setting Nonpositive Deflection, Maximum Meshable Tooth Profile In Flat Wave Gear Device
Granted: June 4, 2009
Application Number:
20090139357
In a flat wave gear device, there is determined a rack-approximated movement locus Lc1 of a flexible externally toothed gear with respect to an S-side rigid internally toothed gear accompanying rotation of a wave generator, ?OPT is a minimum value of the radius of curvature of the movement locus Lc1, and is determined from an evolute e of the movement locus Lc1. A convex arc having a radius ? (???OPT) is used in a main part of a tooth profile of the flexible externally toothed gear. A…
H.264/AVC BASED APPROACH TO SCALABLE VIDEO COMPRESSION
Granted: May 14, 2009
Application Number:
20090122877
A scalable video compression method and apparatus for encoding an input frame sequence having temporally sequential frames includes partitioning each of the frames of the input frame sequence into a top field and a bottom field to form a base layer sequence of fields and an enhancement layer sequence of fields. The base layer sequence and the enhancement layer sequence each comprise temporally alternating top and bottom fields of the partitioned frames of the input frame sequence. The…
FINGER UNIT FOR ROBOT HAND AND METHOD OF ASSEMBLING THE SAME
Granted: May 7, 2009
Application Number:
20090114054
A multi-joint finger unit (1) has first and second joint sections (3, 5) constructed by using bevel gears. In each joint section (3, 5), the section where a driving bevel gear (10, 44) and a driven bevel gear (14, 56) mesh with each other and also a bearing section of a joint shaft (15, 57) are assembled in a tubular housing (13, 51) whose forward end is closed. Rear end openings (13A, 52) of the tubular housings (13, 51) are closed by a tubular housing (7) at a finger root and a tubular…
System and Method for Adaptive Video Compression Motion Compensation
Granted: March 26, 2009
Application Number:
20090080525
Methods and systems for video coding are provided. A method includes receiving a digital video stream. The digital video stream includes multiple sequential independent frames. The method further includes storing a first frame of the digital video stream. The method also includes encoding a second frame of the digital video stream using motion compensation with the stored first frame as a reference.
WAVE GEAR DEVICE
Granted: January 29, 2009
Application Number:
20090025500
A wave gear device is proposed having an anti-ratcheting mechanism having a simple configuration, wherein a center through-hole is formed in a cylinder hub of a wave generator, a small-diameter shaft end portion of a rotating input shaft is concentrically inserted in the center through-hole, and the two members are fastened by a fastening bolt, and a friction ring is concentrically sandwiched between the small-diameter shaft end portion and the cylinder hub and pressed in the radial…
METHOD FOR ADJUSTING DRIVE CHARACTERISTICS OF SCANNER DRIVER OF GALVANOMETRIC SCANNER
Granted: December 4, 2008
Application Number:
20080297867
A scanner driver of a galvanometric scanner system includes an analog drive circuit; a control unit 31 for storing and holding optimized data formed from combinations of optimal values of circuit constants set in advance in accordance with a plurality of drive modes of a galvanometric scanner; and an electronic trimmer for changing the circuit constants of the analog drive circuit. The control unit selects one of the optimized data in accordance with an external input, and sets or…
Electromagnetic Brake Device For Small-Sized Motor
Granted: August 14, 2008
Application Number:
20080191567
An electromagnetic brake device (3) is assembled to a rear end section of a small-sized motor (1). The electromagnetic brake device (3) has a rotating disc (11) fixed to a motor rotation shaft (4), a sliding disc (12) slidable in an axial direction, a coil spring (13) pressing the sliding disc (12) to the rotating disc (11), and an electromagnet (14) capable of attracting the sliding disc (12) against spring force. A circular recess (16e) is formed in the center of a rear end surface of…
FLAT TYPE WAVE GEAR DEVICE
Granted: July 24, 2008
Application Number:
20080173130
A flat type wave gear device is realized having a much improved load capacity. When d is an amount of radial flexing at a major axis location of a rim neutral circle of the flexible external gear of a flat type wave gear device flexed into an elliptical shape and t is the rim thickness of the flexible external gear, then (0.5237 Ln(R)?1.32)d?t?(0.8728 Ln(R)?2.2)d when the reduction ratio R of the wave gear device is less than 80, and (1.5499 Ln(R)?5.8099)d?t?(2.5832 Ln(R)?9.6832)d …
Magnetic Absolute Encoder
Granted: July 3, 2008
Application Number:
20080157705
In the magnetic absolute encoder, an ordinary operating circuit and an ordinary/backup operating circuit are actuated during ordinary operation in which power is supplied from the ordinary operating power supply; the single-rotation absolute value (1) and single-rotation absolute value (2) detected by these circuits are compared by the abnormality diagnosis circuit, and the presence or absence of an abnormality is automatically judged During backup in which the ordinary operating power…
Actuator provided with wave reduction gear
Granted: May 1, 2008
Application Number:
20080098839
In an actuator (1) in which an angle detector (13) of a magnetic encoder for detecting the rotational position of a motor (3) is incorporated inside a wave reduction gear (5), detection signals from Hall elements (11a, 11b) of the angle detector (13) are transmitted via sensor lead wires (17) that have been brought out through wiring holes (36a, 33a, 35a, 37a) formed inside the motor (3) to a sensor signal converter board (14) disposed on the rear end side of the motor. Since the wiring…
Automatic torque-switching apparatus
Granted: January 31, 2008
Application Number:
20080026901
In an automatic torque-switching apparatus (1), a fixed member (12) of a reduction device (8) is attached to an apparatus housing (2) via a one-way clutch (9) so as to not rotate in the direction of torque acting on the fixed member from the load side. A rotational input member (13) of the reduction device (8) and the fixed member (12) of the reduction device are linked via a torque limiter (10) so as to rotate integrally only when the torque acting on the fixed member (12) is less than…
Reduction gear unit with rotational position sensor
Granted: December 6, 2007
Application Number:
20070281824
A gear-equipped motor (1) is configured from a motor unit (2) and a reduction gear unit (4). The reduction gear unit (4) comprises a wave gear device (7) as a reduction gear, an output shaft (8) integrally formed on a cup-shaped flexible outer gear (72) as a reduced-rotation output element, and an absolute sensor (20) for sensing the rotational position of the output shaft (8). The absolute sensor (20) is disposed on a portion of the output shaft (8) supported in a straddle-mounted state…
Wave Gear Drive Having Negative Deflection Meshing Tooth Profile
Granted: November 22, 2007
Application Number:
20070266819
A rigid internal gear and a flexible external gear of a wave gear drive are spur gears of module m. The number of teeth of the external gear is smaller by 2n (n is a positive integer) than that of the internal gear. The deflection of the major axis of the elliptical rim neutral line on the principal cross-section of the external gear is set at 2K mn (K<1). On the principal cross-section, the meshing of both gears is approximated by rack meshing. The locus M of movement of a tooth of…
Roll Rotation Mechanism
Granted: November 15, 2007
Application Number:
20070265102
In a roll rotation mechanism (1) for continuously causing a film-rolling roll to rotate at a constant rate, an Oldham coupling (4) is interposed in a transmission path between a wave gear reduction mechanism (3) and a roll (10). The Oldham coupling (4) forms a connection between a gear rotation output shaft (34) and a roll rotation shaft (11) in a state in which latitude of movement ? is present about a central axis line (4a). When a roll (10) is continuously rotated at a constant rate,…
Wave gear drive with continuous meshing, high ratcheting torque tooth profile
Granted: August 9, 2007
Application Number:
20070180947
A wave gear drive comprises a circular rigid internal gear and a flexible external gear inside the rigid internal gear. A wave generator in the flexible external gear flexes the flexible external gear into an elliptical shape. The cross-section of the flexible external gear perpendicular to the axis at a point in the tooth trace direction of the flexible external gear is set as the main cross-section. The rigid internal gear and flexible external gear are gears with a module m, and the…
Multichannel pulse train transmitting apparatus
Granted: July 26, 2007
Application Number:
20070170883
In the multi-shaft driving apparatus, position command pulse trains for servomotors are generated from a motor controller and supplied to motor drivers for the respective servomotors via a multichannel pulse train transmitting apparatus. The multichannel pulse train transmitting apparatus converts the position command pulse trains supplied from the motor controller 6 to serial signals in a transmission-side converter, combines the resulting serial signals as a stream signal, and supplies…
Apparatus for transmitting position detection signal of multi-shaft motor
Granted: July 26, 2007
Application Number:
20070171104
An apparatus for transmitting a position detection signal of a multi-shaft motor whereby a parallel-form detection signal that is output from position-detecting devices disposed on each of a plurality of motors and used for indicating a motor rotation position can be transmitted to motor drivers for controlling the driving of the motors via a group of a small number of wires. In the apparatus for transmitting a position detection signal of a multi-shaft motor, a transmission-side…
Finger unit for robot hand
Granted: July 12, 2007
Application Number:
20070158964
A finger unit of a robot hand has a first rotational actuator, a first finger joint part, a first finger linkage, a second finger joint part, and a second finger linkage that are connected in this order. A second rotational actuator is attached to the first finger linkage. The first finger linkage swivels about the first finger joint part by the first rotational actuator, and the second finger linkage swivels about the second finger joint part by the second rotational actuator. The…
Method for mounting detection mechanism of planetary gear apparatus
Granted: June 7, 2007
Application Number:
20070129207
A rotation actuator comprises a motor and a planetary reduction gear device, and an internal gear of the planetary reduction gear device has an internal gear formation portion in which internal teeth are formed, a thin cylindrical portion, and an annular flange fixed to a device housing. An external peripheral surface portion of the cylindrical portion is used as a location for attaching a strain gauge, and a space on the inner side of the cylindrical portion is used as a location for…
