Patents by Inventor Chi-Wen Chung

Chi-Wen Chung has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210062866
    Abstract: A bearing assembly and a rotary shaft apparatus employing the same are provided. The bearing assembly is rotatably coupled with a first shaft and a second shaft. The first bearing housing includes a first annular recess having a first axial depth. The first bearing is connected with the first annular recess and the first shaft and has a first axial thickness. The second bearing housing includes a second annular recess having a second axial depth. The second bearing is connected with the first annular recess, the second annular recess and the second shaft and has a second axial thickness. The spacer is disposed between the first bearing and the second bearing and has a third axial thickness. The sum of the first axial thickness, the second axial thickness and the third axial thickness is greater than the sum of the first axial depth and the second axial depth.
    Type: Application
    Filed: February 11, 2020
    Publication date: March 4, 2021
    Inventors: Chi-Wen Chung, En-Yi Chu, Ming-Li Tsao, Hung-Wei Lin, Jen-Yuan Chen, Hsien-Lung Tsai
  • Patent number: 10914616
    Abstract: An encoder applied to a rotatable device including a code disc set, at least one bearing, a bearing housing, a main housing, a sensor and an elastic assembly. The code disc set is disposed on a rotation end of the rotatable device. The bearing is disposed around the rotation end, and the bearing housing is disposed around the bearing. The main housing is connected with a first end of the bearing housing. The sensor is disposed on the main housing and corresponds to the disc wheel set, and there is an interval between the sensor and the code disc set. The elastic assembly is connected with a second end of the bearing housing and a fixing end of the rotatable device. Therefore, the interval between the sensor and the code disc set is maintained to be fixed, and the good position detection performance and stable signals are obtained.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: February 9, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, Ming-Tien Tsai, Chun-Hung Chen
  • Patent number: 10859143
    Abstract: The linear driving system comprises a motor, a screw shaft and a table. The motor comprises a rotor, a stator and a ball bearing. The stator comprises a shaft part and a spiral part. The shaft part and the spiral part jointly comprise an accommodation space. The spiral part comprises a first helical protrusion formed on the inner surface thereof. The screw shaft is coaxially coupled with the rotor. One end of the screw shaft comprises a second helical protrusion formed on the outer surface thereof, and the screw shaft is accommodated within the accommodation space. The table is fixed on the other end of the screw shaft. The first helical protrusion is engaged with the second helical protrusion. When the rotor is rotated, the rotor drives the screw shaft and the table to move forward or backward linearly in the direction of the axial of the rotor.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: December 8, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Wen Chung, Chun-Chin Su
  • Publication number: 20200232542
    Abstract: A cycloid speed reducer includes a weight element, an input shaft and a cycloid disc. The weight element is disposed within an accommodation space of the cycloid disc. An eccentric part is disposed on the input shaft. Since the length of the input shaft is reduced, the overall length of the cycloid speed reducer is shortened. Moreover, the mass center of the weight element and the mass center of the eccentric part and the cycloid disc are arranged along the same axial direction. That is, the line passing through the mass center of the weight element and the mass center of the eccentric part and the cycloid disc is perpendicular to the input shaft. Consequently, the efficacy of the dynamic balance of the cycloid speed reducer is enhanced.
    Type: Application
    Filed: January 10, 2020
    Publication date: July 23, 2020
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao
  • Patent number: 10673304
    Abstract: A speed reducing device includes a motor and a speed reducing mechanism. The motor includes a stator portion and a rotor portion. The rotor portion includes a first eccentric ring and a second eccentric ring. The speed reducing mechanism is partially accommodated within the rotor portion. The speed reducing mechanism includes a first roller assembly, a second roller assembly, a third roller assembly, a first cycloid disc set and a second cycloid disc set. The first roller assembly includes at least one first roller. The second roller assembly includes at least one second roller. The third roller assembly includes an output shaft and at least one third roller. The first cycloid disc set is mounted around the output shaft and disposed within the first eccentric ring. The second cycloid disc set is mounted around the output shaft and disposed within the second eccentric ring.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: June 2, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, En-Yi Chu
  • Publication number: 20200141478
    Abstract: A speed reducer comprises a transmission shaft, an eccentric wheel, a first wheel assembly, a rotating wheel and a second wheel assembly. The first wheel assembly comprises a first wheel disc and at least one first roller. The at least one first roller is disposed on the inner wall of first wheel disc. The rotating wheel comprises a main body comprising an outer ring structure and a concave structure. The outer ring structure comprises at least one first tooth. The at least one first tooth is in contact with the corresponding first roller. At least one second roller is disposed within the concave structure. The second wheel assembly comprises a second wheel disc and at least one second tooth. The at least one second tooth is disposed on an outer periphery of the second wheel assembly. The at least one second tooth is in contact with the corresponding second roller.
    Type: Application
    Filed: September 27, 2019
    Publication date: May 7, 2020
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao
  • Publication number: 20200144888
    Abstract: A speed reducing device includes a motor and a speed reducing mechanism. The speed reducing mechanism includes at least one roller assembly, a cycloid disc, at least one fixing disc and a positioning assembly. The roller assembly is disposed within a rotor portion of the motor. While the roller assembly is rotated with the rotor portion, the roller assembly is eccentrically revolved. The roller assembly includes a wheel disc and at least one roller. The cycloid disc includes a main body and at least one cycloid tooth structure. The cycloid tooth structure is protruded from an outer periphery of the main body and in contact with the corresponding roller. While the roller assembly is eccentrically revolved, the at least one cycloid tooth structure is pushed against the corresponding roller, so that the cycloid disc is correspondingly rotated.
    Type: Application
    Filed: September 27, 2019
    Publication date: May 7, 2020
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao
  • Publication number: 20200132166
    Abstract: A two-stage cycloid speed reducer comprises two rotating disc assemblies. Each rotating disc assembly comprises two cycloid discs. In other words, the cycloid speed reducer has four cycloid discs to be in contact with the corresponding rollers. Consequently, the load withstood by each cycloid disc is reduced. Since the cycloid speed reducer has stronger structural strength, the cycloid speed reducer can be applied to the high-load circumstance. Moreover, an eccentric assembly of the eccentric device includes a plurality of eccentric cylinders. The eccentric cylinders are disposed within the axle holes of the corresponding cycloid discs. Due to the eccentric cylinders, the eccentric direction of two cycloid discs is opposite to the eccentric direction of the other two cycloid discs. Consequently, it is not necessary to install an additional weight compensation device in the cycloid speed reducer to compensate the dynamic equilibrium. Moreover, the cycloid speed reducer can be assembled easily.
    Type: Application
    Filed: December 27, 2019
    Publication date: April 30, 2020
    Inventors: Chi-Wen Chung, En-Yi Chu, Hung-Wei Lin, Ming-Li Tsao, Ching-Hsiung Tsai
  • Publication number: 20200124147
    Abstract: A linear-rotary actuator includes a base, a first linear motor, a second linear motor, a linear rail, and a ball screw. The first and second linear motors are disposed on the base and respectively have a coil assembly and a magnet backplane. The linear rail is located on the base. The ball screw includes a screw and a nut, wherein the screw is connected to the first linear motor, and the nut is connected to the second linear motor. When the screw and the nut are driven by the first and second linear motors to move along the linear rail in a synchronized manner, the linear-rotary actuator provides linear motion output. When the nut is driven by the second linear motor to move along the linear rail in an asynchronous manner with respect to the screw, the linear-rotary actuator provides rotary motion output.
    Type: Application
    Filed: December 20, 2019
    Publication date: April 23, 2020
    Inventors: Chi-Wen CHUNG, Po-Tzu CHEN
  • Patent number: 10601295
    Abstract: A moving-magnet transfer platform includes a mover part, a driving part and a stator part. The mover part includes a moving table and a magnet assembly. The stator part includes plural coils, plural switch elements, a current sensor, an electric angle detector, plural magnetic field sensors and a signal processor. The plural switch elements are connected between the driving part and the corresponding coils. When the magnet assembly is moved to a position of the corresponding coil, a magnetic field change is detected by the corresponding magnetic field sensor. The signal processor is used for controlling operations of the plural switch elements. When the magnet assembly is moved to the position of the corresponding coil, the corresponding switch element is turned on under control of the signal processor, so that the moving table is moved with the magnet assembly.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: March 24, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, Chieh-Huang Lu
  • Publication number: 20200080870
    Abstract: An encoder applied to a rotatable device including a code disc set, at least one bearing, a bearing housing, a main housing, a sensor and an elastic assembly. The code disc set is disposed on a rotation end of the rotatable device. The bearing is disposed around the rotation end, and the bearing housing is disposed around the bearing. The main housing is connected with a first end of the bearing housing. The sensor is disposed on the main housing and corresponds to the disc wheel set, and there is an interval between the sensor and the code disc set. The elastic assembly is connected with a second end of the bearing housing and a fixing end of the rotatable device. Therefore, the interval between the sensor and the code disc set is maintained to be fixed, and the good position detection performance and stable signals are obtained.
    Type: Application
    Filed: November 1, 2018
    Publication date: March 12, 2020
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, Ming-Tien Tsai, Chun-Hung Chen
  • Patent number: 10557534
    Abstract: A linear-rotary actuator includes a base, a first linear motor, a second linear motor, a linear rail, and a ball screw. The first and second linear motors are disposed on the base and respectively have a coil assembly and a magnet backplane. The linear rail is located on the base. The ball screw includes a screw and a nut, wherein the screw is connected to the first linear motor, and the nut is connected to the second linear motor. When the screw and the nut are driven by the first and second linear motors to move along the linear rail in a synchronized manner, the linear-rotary actuator provides linear motion output. When the nut is driven by the second linear motor to move along the linear rail in an asynchronous manner with respect to the screw, the linear-rotary actuator provides rotary motion output.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: February 11, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chi-Wen Chung, Po-Tzu Chen
  • Publication number: 20190379265
    Abstract: An actuator is provided, including a fixed assembly and a movable assembly. The fixed assembly includes a coil module, a base, a first screwing member, and a linear rail. The first screwing member passes through the base and the linear rail, and the linear rail is positioned on the base. The movable assembly includes a U-shaped back board having an inner space, a first magnetic module, a second magnetic module aligned with the first magnetic module, and a sliding block. The first and second magnetic modules are disposed on the U-shaped back board and accommodated in the inner space. The coil module is disposed between the first magnetic module and the second magnetic module. The sliding block is positioned on the U-shaped back board in the inner space, and slidably connected to the linear rail.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 12, 2019
    Inventors: Po-Tzu CHEN, Chi-Wen CHUNG, En-Yi CHU, Chun-Hsiu CHEN
  • Patent number: 10439480
    Abstract: An actuator is provided, including a fixed assembly and a movable assembly. The fixed assembly includes a coil module, a base, a first screwing member, and a linear rail. The first screwing member passes through the base and the linear rail, and the linear rail is positioned on the base. The movable assembly includes a U-shaped back board having an inner space, a first magnetic module, a second magnetic module aligned with the first magnetic module, and a sliding block. The first and second magnetic modules are disposed on the U-shaped back board and accommodated in the inner space. The coil module is disposed between the first magnetic module and the second magnetic module. The sliding block is positioned on the U-shaped back board in the inner space, and slidably connected to the linear rail.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: October 8, 2019
    Assignee: Delta Electronics, Inc.
    Inventors: Po-Tzu Chen, Chi-Wen Chung, En-Yi Chu, Chun-Hsiu Chen
  • Publication number: 20190302599
    Abstract: A projection system, a beam generating apparatus, and a beam generating method are provided. The beam generating apparatus includes a plurality of light emitting devices, a plurality of drivers, and a first auxiliary driver. The light emitting devices respectively generate a plurality of color lights with different wavelengths. The drivers respectively drive the light emitting devices according to a plurality of control signals. The first auxiliary driver drives a first light emitting device according to a first auxiliary control signal, and adjusts brightness of the first light emitting device according to a first regulating signal. When the first auxiliary control signal is enabled, the control signal corresponding the first light emitting device is disabled.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Applicant: Coretronic Corporation
    Inventors: Chi-Wen Ke, Chi-Hung Chung
  • Patent number: 10364103
    Abstract: A conveyor system includes a moving stage, a track, a control circuit and a driver. The moving stage has a plurality of magnets and an optical scale. The track carries the moving stage and includes a first work area provided with a plurality of Hall sensor modules and a second work area provided with the Hall sensor modules and a read head module. When the moving stage is in the first work area, the Hall sensor module generates a first sensing signal. When the moving stage is in the second work area, the Hall sensor module generates the first sensing signal and the read head module generates a second sensing signal. The control circuit determines the position of the moving stage based on the first sensing signal and the second sensing signal, and generates a driving signal. The driver drives the coil windings according to the driving signal.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: July 30, 2019
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Ching-Hsiung Tsai, Chieh-Huang Lu, Chi-Wen Chung
  • Publication number: 20190140515
    Abstract: A speed reducing device includes a motor and a speed reducing mechanism. The motor includes a stator portion and a rotor portion. The rotor portion includes a first eccentric ring and a second eccentric ring. The speed reducing mechanism is partially accommodated within the rotor portion. The speed reducing mechanism includes a first roller assembly, a second roller assembly, a third roller assembly, a first cycloid disc set and a second cycloid disc set. The first roller assembly includes at least one first roller. The second roller assembly includes at least one second roller. The third roller assembly includes an output shaft and at least one third roller. The first cycloid disc set is mounted around the output shaft and disposed within the first eccentric ring. The second cycloid disc set is mounted around the output shaft and disposed within the second eccentric ring.
    Type: Application
    Filed: November 1, 2018
    Publication date: May 9, 2019
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, En-Yi Chu
  • Publication number: 20190062066
    Abstract: A conveyor system includes a moving stage, a track, a control circuit and a driver. The moving stage has a plurality of magnets and an optical scale. The track carries the moving stage and includes a first work area provided with a plurality of Hall sensor modules and a second work area provided with the Hall sensor modules and a read head module. When the moving stage is in the first work area, the Hall sensor module generates a first sensing signal. When the moving stage is in the second work area, the Hall sensor module generates the first sensing signal and the read head module generates a second sensing signal. The control circuit determines the position of the moving stage based on the first sensing signal and the second sensing signal, and generates a driving signal. The driver drives the coil windings according to the driving signal.
    Type: Application
    Filed: May 8, 2018
    Publication date: February 28, 2019
    Inventors: Ching-Hsiung TSAI, Chieh-Huang LU, Chi-Wen CHUNG
  • Publication number: 20180335113
    Abstract: The linear driving system comprises a motor, a screw shaft and a table. The motor comprises a rotor, a stator and a ball bearing. The stator comprises a shaft part and a spiral part. The shaft part and the spiral part jointly comprise an accommodation space. The spiral part comprises a first helical protrusion formed on the inner surface thereof. The screw shaft is coaxially coupled with the rotor. One end of the screw shaft comprises a second helical protrusion formed on the outer surface thereof, and the screw shaft is accommodated within the accommodation space. The table is fixed on the other end of the screw shaft. The first helical protrusion is engaged with the second helical protrusion. When the rotor is rotated, the rotor drives the screw shaft and the table to move forward or backward linearly in the direction of the axial of the rotor.
    Type: Application
    Filed: January 24, 2018
    Publication date: November 22, 2018
    Inventors: Chi-Wen Chung, Chun-Chin Su
  • Publication number: 20180254691
    Abstract: A moving-magnet transfer platform includes a mover part, a driving part and a stator part. The mover part includes a moving table and a magnet assembly. The stator part includes plural coils, plural switch elements, a current sensor, an electric angle detector, plural magnetic field sensors and a signal processor. The plural switch elements are connected between the driving part and the corresponding coils. When the magnet assembly is moved to a position of the corresponding coil, a magnetic field change is detected by the corresponding magnetic field sensor. The signal processor is used for controlling operations of the plural switch elements. When the magnet assembly is moved to the position of the corresponding coil, the corresponding switch element is turned on under control of the signal processor, so that the moving table is moved with the magnet assembly.
    Type: Application
    Filed: September 20, 2017
    Publication date: September 6, 2018
    Inventors: Ching-Hsiung Tsai, Chi-Wen Chung, Chieh-Huang Lu