Patents Assigned to Chieftek Precision Co., Ltd.
  • Patent number: 10784760
    Abstract: A core-type linear motor includes: a stator extending in an axial direction, with magnets arranged at intervals in the axial direction, wherein each magnet and its spacing from an adjacent magnet constitute a magnet unit; and a rotor opposite the stator and linearly movable in the axial direction, with coil assemblies arranged side by side in the axial direction. Each coil assembly includes a core with an active portion wound with a coil and a supporting portion. Three coil assemblies have substantially the same length in the axial direction as four magnet units. When the length of each magnet unit is defined as 1, the length of each active portion is 0.3 to 0.5, and the height of each supporting portion, 0.28 to 0.38. These size ratios help increase the motor constant, lower the cogging force, and reduce positive attraction between the rotor and the stator.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 22, 2020
    Assignee: Chieftek Precision Co., Ltd.
    Inventors: Ming-Che Hsu, Hsuan-Chun Wu, Hsun-Han Liu
  • Patent number: 10359074
    Abstract: A miniature slider structure having foot portions and a linear slide are provided. The linear slide includes a slider and a slide rail. The slider straddles the slide rail so that the slider can be reciprocated on the slide rail. The slide rail extends in a direction. The slider includes a plate and two opposite foot portions extending downward from the plate. The slider straddles the slide rail through the foot portions. The plate has a mounting surface. Through the polishing process on the mounting surface of the plate, the roughness Ra of the mounting surface is controlled to be in the range of 0.01 microns to 0.1 microns so as to reduce the deformation of the foot portions when the working platform is installed.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: July 23, 2019
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-Che Hsu
  • Patent number: 9148047
    Abstract: A coil unit and coil assembly for iron-less liar motor and the coil unit includes two vertical function sides and two axial non-function sides. The multiple units are alternatively connected to each other by inserting the vertical function side of one coil unit into the hollow portion of the adjacent coil unit so as to form a coil assembly. The width of the vertical function side is D1 and the distance between two respective insides of the two vertical function sides is D2. D2=m×D1+?L, wherein m representing the number of the vertical function sides of other coil units received in the vertical direction of the hollow portion. The ?L is the width of the gap which receives a separation plate between the two adjacent vertical function sides to increase the efficiency of dissipating heat or insulation when current passes through the coil assembly.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: September 29, 2015
    Assignee: CHIEFTEK PRECISION CO., LTD.
    Inventor: Ming-che Hsu
  • Patent number: 8967862
    Abstract: A slider assembly configured to move on a slide rail along an axial direction without limitation in distance is provided to solve the problems of the middle retaining members of a conventional circulation maintaining device, e.g., insufficient connection rigidity and inconvenience in manufacture and assembly. The positioning portion of a middle retaining member and the positioning portion of the protrusion of a slider are connected in a direction perpendicular to both the axial direction and a transverse direction in which the protrusion projects, thereby connecting the middle retaining member and the protrusion securely and evenly along their entire lengths. The middle retaining member and the protrusion also feature ease of manufacture and assembly.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: March 3, 2015
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-Che Hsu
  • Patent number: 8926181
    Abstract: An endless circulation path for a linear rail includes a loaded path, an unloaded path and two direction change paths which are connected between the loaded path and the unloaded path. Each of the unloaded path, the direction change paths and the loaded path has top and bottom grooves. A first line is connected between top and bottom grooves of the unloaded path. A second line is connected between the top and bottom grooves of each of the direction change paths. A slope of the second line, starting from the intersection between the direction change path and the unloaded path to the intersection between the direction change path and the loaded path, is gradually inclined relative to the first line. A third line is connected between the top and bottom groove of the loaded path. The third line is inclined relative to the first line.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: January 6, 2015
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Patent number: 8888368
    Abstract: A roller retaining chain includes a carrier belt extending along a longitudinal direction and multiple holes are defined through the carrier belt so as to respectively receive a roller therein. A retainer is located between any two adjacent holes and each of the retainers includes a first part and a bottom part. The first/second part has a first/second face facing the hole. Each of the first and second faces has a guide member and each guide member has a guide face which is perpendicular to the longitudinal direction. The two respective guide faces are located on the same plane. Each of the guide faces has an inclined stop face extending therefrom so as to retain the roller in the hole. Each roller is in contact with the two guide faces to prevent from being tilt.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: November 18, 2014
    Assignee: Chieftek Precision Co., Ltd
    Inventor: Ming-che Hsu
  • Patent number: 8887892
    Abstract: A chain for rolling elements includes a carrier belt having first and second side strip on two sides thereof, and multiple holes are defined in the carrier belt and located between the first and second side strips. Each hole has a first opening end and a second opening end. Multiple retainers are connected to the carrier belt and located alternatively with respect to the holes. Multiple first ribs are connected between the first side strip and the retainer. Multiple second ribs are connected between the second side strip and the retainer. Each of the first and second side strips has a thickness T1, and each of the first and second ribs has a thickness T2 which is smaller than T1. The first and second ribs reinforce connections between the first and second side strips and the retainers so that the chain has even flexibility and can operate smoothly.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: November 18, 2014
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Patent number: 8870508
    Abstract: A bolt-hole cap for sealing the bolt hole of a rail includes a top face and a bottom face from which multiple protrusions extend. Each protrusion extends radially from inner portion toward outer portion of the bolt-hole cap. Each protrusion has two side faces and an end face connected between the two side faces. The end face has a first width. When the bolt-hole cap is inserted into a bolt hole and the top face of the bolt-hole cap is in flush with the top face of the rail, the end face of each of the protrusions contacts the bolt in the bolt hole. The protrusions are plastically deformed toward the side faces and the end face has a second width which is wider than the first width, so that the bolt-hole cap has sufficient strength to keep the top thereof flushing the top of the rail.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: October 28, 2014
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Patent number: 8858082
    Abstract: A circulation maintaining device for a linear slide assembly includes two top boards, four half mediate plates, two third half tubes, two bottom boards, and two end caps. Each of the above mentioned parts is manufactured integrally by way of injection molding and needs only one set of molds. These parts are connected to the slider symmetrically. Each of the half mediate tubes provides a second half tube and a half mediate plate. The second half tubes are inserted into the top holes and the bottom holes from two ends of the slider. The two half maintaining plates each have stops and recessed areas in longitudinal direction thereof so as to form restriction in transverse direction. The half maintaining plats each have ribs which are engaged with the grooves in the slider to provide positioning effect in a vertical direction.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: October 14, 2014
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Publication number: 20140152124
    Abstract: A coil unit and coil assembly for iron-less liar motor and the coil unit includes two vertical function sides and two axial non-function sides. The multiple units are alternatively connected to each other by inserting the vertical function side of one coil unit into the hollow portion of the adjacent coil unit so as to form a coil assembly. The width of the vertical function side is D1 and the distance between two respective insides of the two vertical function sides is D2. D2=m×D1+?L, wherein m representing the number of the vertical function sides of other coil units received in the vertical direction of the hollow portion. The ?L is the width of the gap which receives a separation plate between the two adjacent vertical function sides to increase the efficiency of dissipating heat or insulation when current passes through the coil assembly.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: CHIEFTEK PRECISION CO., LTD.
    Inventor: Ming-che HSU
  • Publication number: 20140060996
    Abstract: A chain for rolling elements includes a carrier belt having first and second side strip on two sides thereof, and multiple holes are defined in the carrier belt and located between the first and second side strips. Each hole has a first opening end and a second opening end. Multiple retainers are connected to the carrier belt and located alternatively with respect to the holes. Multiple first ribs are connected between the first side strip and the retainer. Multiple second ribs are connected between the second side strip and the retainer. Each of the first and second side strips has a thickness T1, and each of the first and second ribs has a thickness T2 which is smaller than T1. The first and second ribs reinforce connections between the first and second side strips and the retainers so that the chain has even flexibility and can operate smoothly.
    Type: Application
    Filed: February 26, 2013
    Publication date: March 6, 2014
    Applicant: CHIEFTEK PRECISION CO., LTD.
    Inventor: Ming-che HSU
  • Publication number: 20130315515
    Abstract: A circulation maintaining device for a linear slide assembly includes two top boards, four half mediate plates, two third half tubes, two bottom boards, and two end caps. Each of the above mentioned parts is manufactured integrally by way of injection molding and needs only one set of molds. These parts are connected to the slider symmetrically. Each of the half mediate tubes provides a second half tube and a half mediate plate. The second half tubes are inserted into the top holes and the bottom holes from two ends of the slider. The two half maintaining plates each have stops and recessed areas in longitudinal direction thereof so as to form restriction in transverse direction. The half maintaining plats each have ribs which are engaged with the grooves in the slider to provide positioning effect in a vertical direction.
    Type: Application
    Filed: May 23, 2013
    Publication date: November 28, 2013
    Applicant: CHIEFTEK PRECISION CO., LTD.
    Inventor: Ming-che HSU
  • Patent number: 8154156
    Abstract: A coil assembly for a linear motor includes a coil unit which has multiple adjacently arranged coils, a base, and a resin encapsulated layer. The coils have two corresponding vertical action sides, a first non-action side, and a second non-action side. The coils further form multiple interlaced first bending sections on the first non-action side. Plural conducting wires disposed on the second non-action side could connect to an external cable on an end section of the coil unit. The base has a receiving slot thereon. The cross-section of the receiving slot corresponds in shape to that of the first bending sections for insertion of the coils. The resin encapsulated layer covering the coils and sealing the receiving slot of the base increases the contacting area between the coils and the inner wall of the receiving slot of the base to enhance the heat dissipation rate.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: April 10, 2012
    Assignee: Chieftek Precision Co., Ltd.
    Inventor: Ming-che Hsu
  • Patent number: 8115348
    Abstract: The present invention discloses a unit coil, a coil assembly and a coreless type linear motor. The unit coil includes bent subcoils arranged adjacent to one another and disposed on a non-acting side axially. The coil assembly includes tri-phase unit coil modules arranged in an operating direction, and the tri-phase unit coil module is composed of three identical unit coils alternately stacked and sealed by a resin layer, and the unit coil is formed by bending and stacking sub-coils. The bent sub-coils are stacked to a sufficient thickness or arranged to a sufficient width to achieve the desired driving force, and then a magnetic rail is provided to form a coreless type linear motor. In the aforementioned structure, the unit coil composed by an alternately overlapping layout method effectively reduces the required space of the coil assembly, and the sub-coils can be manufactured easily and will not be damaged easily.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: February 14, 2012
    Assignee: Chieftek Precision Co., Ltd.
    Inventors: Ming-Che Hsu, Chi-Wen Chung, Yung-Ho Hsiao, Wen-Jeng Wu
  • Publication number: 20100295385
    Abstract: The present invention discloses a unit coil, a coil assembly and a coreless type linear motor. The unit coil includes bent subcoils arranged adjacent to one another and disposed on a non-acting side axially. The coil assembly includes tri-phase unit coil modules arranged in an operating direction, and the tri-phase unit coil module is composed of three identical unit coils alternately stacked and sealed by a resin layer, and the unit coil is formed by bending and stacking sub-coils. The bent sub-coils are stacked to a sufficient thickness or arranged to a sufficient width to achieve the desired driving force, and then a magnetic rail is provided to form a coreless type linear motor. In the aforementioned structure, the unit coil composed by an alternately overlapping layout method effectively reduces the required space of the coil assembly, and the sub-coils can be manufactured easily and will not be damaged easily.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 25, 2010
    Applicant: CHIEFTEK PRECISION CO., LTD.
    Inventors: MING-CHE HSU, CHI-WEN CHUNG, YUNG-HO HSIAO, WEN-JENG WU