US4578622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear pulse motor
Assignee: Shinko Electric Co Ltd
•
Filing: 1983-10-20
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Granted: 1986-03-25
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Expires: 2003-10-20
Abstract
Abstract A linear pulse motor includes: a primary body including first magnetic circuit forming members provided with coils; a secondary body including a second magnetic circuit forming member, one of the primary body and the secondary body being movable relative to the other in one direction; the first magnetic circuit forming members including plural pole surfaces in each of which first plural teeth are formed at constant pitch, the groups of the first plural teeth of the plural pole surfaces being shifted from one another in a predetermined order by the pitch length x the reciprocal of the number of the pole surfaces (P/n, where P and n represent the pitch length of the first plural teeth and the number of the pole surfaces, respectively); the second magnetic circuit forming member including second plural teeth of the same pitch as the first plural teeth of the plural pole surfaces; and guide members for guiding the one of the primary body and the secondary body movably in the one direction, arranged between the primary body and the secondary body for maintaining the constant air gap between the first plural teeth and second plural teeth; wherein at least one closed magnetic circuit is formed by the first and second magnetic circuit members, and said air gap, and the first magnetic circuit forming members are so shaped and arranged relative to the second magnetic circuit forming member that, when the coils are energized in such a mode or order that magnetic attraction occurs between the selected one or ones of the groups of the first plural teeth in the predetermined order, and the second plural teeth of the secondary body for moving the one of the primary body and secondary body by P/n in the one direction, magnetic flux flowing through the first and second magnetic circuit forming members is substantially perpendicular to magnetic flux flowing through the air gap.
Inventors
- 👤 Hiroshi Nakagawa
- 👤 Zenichiro Miwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:50
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J19/30; B41J19/305
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
358 words
A linear pulse motor comprising: (A) a primary body including first magnetic circuit forming means provided with a coil or coils; (B) a secondary body including second magnetic circuit forming means, one of said primary body and said secondary body being movable relative to the other in one axis of direction; (C) said primary body and said secondary body being flat in parallel planes to each other; (D) said first magnetic circuit forming means including plural pole surface portions in one surface in each of which first plural teeth are formed at constant pitch, the groups of the first plural teeth of said plural pole surface portions being shifted from one another in a predetermined order by the pitch length x the reciprocal of the number of said pole surface portions (p/n, where p and n represent the pitch length of the first plural teeth and the number of said pole surface portions, respectively); (E) said second magnetic circuit forming means including second plural teeth of the same pitch as said first plural teeth of the plural pole surface portions; and (F) guide means for guiding said one of the primary body and the secondary body movably in said one axis of direction, arranged between said primary body and said secondary body for maintaining the constant air gap between said first plural teeth and second plural teeth; (G) the axis of said coil or coils around which said coil or coils are wound, being substantially perpendicular to said constant air gap; wherein at least one closed magnetic circuit is formed by said first and second magnetic circuit forming means, and said air gap, when said coil or coils are energized in such a mode or order that magnetic attraction occurs between the selected one or ones of the groups of said first plural teeth in said predetermined order, and said second plural teeth of the secondary body for moving said one of the primary body and secondary body by P/n in said one direction, magnetic flux flows through said one closed magnetic circuit and is substantially perpendicular to said air gap in said first magnetic circuit forming means.
Claim 2
Dependent Claim
358 words
A linear pulse motor comprising: (A) a primary body including first magnetic circuit forming means provided with a coil or coils; (B) a secondary body including second magnetic circuit forming means, one of said primary body and said secondary body being movable relative to the other in one axis of direction; (C) said primary body and said secondary body being flat in parallel planes to each other; (D) said first magnetic circuit forming means including plural pole surface portions in one surface in each of which first plural teeth are formed at constant pitch, the groups of the first plural teeth of said plural pole surface portions being shifted from one another in a predetermined order by the pitch length x the reciprocal of the number of said pole surface portions (p/n, where p and n represent the pitch length of the first plural teeth and the number of said pole surface portions, respectively); (E) said second magnetic circuit forming means including second plural teeth of the same pitch as said first plural teeth of the plural pole surface portions; and (F) guide means for guiding said one of the primary body and the secondary body movably in said one axis of direction, arranged between said primary body and said secondary body for maintaining the constant air gap between said first plural teeth and second plural teeth; (G) the axis of said coil or coils around which said coil or coils are wound, being substantially perpendicular to said constant air gap; wherein at least one closed magnetic circuit is formed by said first and second magnetic circuit forming means, and said air gap, when said coil or coils are energized in such a mode or order that magnetic attraction occurs between the selected one or ones of the groups of said first plural teeth in said predetermined order, and said second plural teeth of the secondary body for moving said one of the primary body and secondary body by P/n in said one direction, magnetic flux flows through said one closed magnetic circuit and is substantially perpendicular to said air gap in said first magnetic circuit forming means.
Claim 3
Dependent Claim
91 words
A linear pulse motor according to claim 1, in which said first magnetic circuit forming means includes a pair of magnetic cores, each of which includes a yoke portion and plural magnetic pole portions projected laterally from said yoke portion, said magnetic pole portions of the one magnetic core extending towards said magnetic pole portions of the other magnetic core, respectively, and said pole surfaces being formed in the end portions of said magnetic pole portions, and said coils are fitted to said magnetic pole portions of the magnetic cores, respectively.
Claim 4
Dependent Claim
37 words
A linear pulse motor according to claim 2, in which opposite extensions of said yoke portions are combined with each other through permanent magnets, and the magnetization directions of said permanent magnets are equal to each other.
Claim 5
Dependent Claim
65 words
A linear pulse motor according to claim 2, in which said guide means includes pairs of guide members fixed to the stationary one of said primary body and said secondary body, and balls which are arranged in guide portions of said guide members, respectively, said secondary body is plate-like, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls.
Claim 6
Dependent Claim
37 words
A linear pulse motor according to claim 4, in which the rolling range of said balls are limitted to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 7
Dependent Claim
65 words
A linear pulse motor according to claim 3, in which said guide means includes pairs of guide members fixed to the stationary one of said primary body and said secondary body, and balls which are arranged in guide portions of said guide means, respectively, said secondary body is plate-like, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls.
Claim 8
Dependent Claim
37 words
A linear pulse motor according to claim 6, in which the rolling range of said balls are limited to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 9
Dependent Claim
26 words
A linear pulse motor according to claim 2 in which the central portions of said yoke portions are combined with each other through a permanent magnet.
Claim 10
Dependent Claim
91 words
A linear pulse motor according to claim 1, in which said first magnetic circuit forming means includes a pair of magnetic cores, each of which includes a yoke portion and two magnetic pole portions projected laterally from said yoke portion, said magnetic pole portions of the one magnetic core extending towards said magnetic pole portions of the other magnetic core, respectively, and said pole surfaces being formed in the end portions of said magnetic pole portions, and said coils are fitted to said magnetic pole portions of the magnetic cores, respectively.
Claim 11
Dependent Claim
37 words
A linear pulse motor according to claim 9, in which opposite extensions of said yoke portions are combined with each other through permanent magnets, and the magnetization directions of said permanent magnets are equal to each other.
Claim 12
Dependent Claim
65 words
A linear pulse motor according to claim 9, in which said guide means includes pairs of guide members fixed to the stationary one of said primary body and said secondary body, and balls which are arranged in guide portions of said guide means, respectively, said secondary body is plate-like, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls.
Claim 13
Dependent Claim
37 words
A linear pulse motor according to claim 11, in which the rolling range of said balls are limitted to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 14
Dependent Claim
26 words
A linear pulse motor according to claim 9 in which the central portions of said yoke portions are combined with each other through a permanent magnet.
Claim 15
Dependent Claim
90 words
A linear pulse motor according to claim 1, in which said first magnetic circuit forming means includes a pair of magnetic cores, each of which includes a yoke porion and two magnetic pole portions projected laterally from said yoke portion, said magnetic pole portions of the one magnetic core extending towards said magnetic pole portions of the other magnetic core, respectively, and said pole surfaces being formed in the end portions of said magnetic pole portions, and said coils are fittted to said yoke portions of the magnetic cores, respectively.
Claim 16
Dependent Claim
37 words
A linear pulse motor according to claim 14, in which opposite extensions of said yoke portions are combined with each other through permanent magnets, and the magnetization directions of said permanent magnets are equal to each other.
Claim 17
Dependent Claim
159 words
A linear pulse motor according to claim 1, in which said first magnetic circuit forming means includes two pairs of generally L-shaped magnetic pole members, and a pair of generally U-shaped magnetic core frame superimposed respectively on said pairs of the magnetic pole members, head portions of said magnetic pole members are so arranged to be concentrated to one another, said first plural teeth are formed in the end portions of said head portions, in a substantially perpendicular direction to the lengthwise direction of the leg portions of said magnetic pole members, respectively, a coil is fitted to the central portion of each of said magnetic core frames, a permanent magnet is so superimposed on said head portions of the magnetic pole members that the head portions of one of said two pairs of the magnetic pole members are N-polarized, and that the head portions of the other of said two paris of the magnetic pole members are S-polarized.
Claim 18
Dependent Claim
145 words
A linear pulse motor according to claim 16 in which said guide means includes a pair of guide members arranged on the outer side end portions of said head portions of the magnetic pole members along said leg portions of the magnetic pole members, and balls arranged in guide portions of said guide members, one of said guide members is fixed to said primary body, while the other of said guide members is so supported on said primary body as to be movable towards said one of the guide members, and is urged towards said one of the guide members by a spring, said secondary body is plate-like, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls, said balls being softly pinched between said cutout portions of the secondary body and said guide portions of the guide members.
Claim 19
Dependent Claim
37 words
A linear pulse motor according to claim 17, in which the rolling range of said balls are limitted to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 20
Dependent Claim
104 words
A linear pulse motor according to claim 16, in which said coils are energized in such a manner that one of said coils is energized in positive polarity for a predetermined time, at the same time as the deenergization of said one coil, the other of said coils is energized in positive polarity for the predetermined time, at the same time as the deenergization of said other coil, said one coil is energized in negative polarity for the predetermined time, and at the same time as the deenergization of said one coil, said other coil is enrgized in negative polarity for the predetermined time.
Claim 21
Dependent Claim
96 words
A linear pulse motor according to claim 19, in which the groups of said first plural teeth of the head portions of the magnetic pole members are shifted one another by a quarter of the pitch in the following order of: one of the head portions of one of said two pairs of the magnetic pole members, one of the head portions of the other of said two pairs, the other of the head portions of said one of the two pairs, and the other of the head portions of said other of the two pairs.
Claim 22
Dependent Claim
159 words
A linear pulse motor according to claim 1, in which said first magnetic circuit forming means includes two pairs of generally L-shaped magnetic pole members, and a pair of generally U-shaped magnetic core frames superimposed respectively on said pairs of the magnetic pole members, head portions of said magnetic pole members are so arranged to be concentrated to one another, said first plural teeth are formed in the end portions of said head portions, in a substantially parallel direction to the lengthwise direction of the leg portions of said magnetic pole members, respectively, a coil is fitted to the central portion of each of said magnetic core frames, a permanent magnet is so superimposed on said head portions of the magnetic pole members that the head portions of one of said two paris of the magnetic pole members are N-polarized, and that the head portions of the other of said two paris of the magnetic pole members are S-polarized.
Claim 23
Dependent Claim
150 words
A linear pulse motor according to claim 21 in which said guide means includes a pair of guide members arranged at both sides of the group of said head portions of the magnetic pole members in a substantially perpendicular direction to said leg portions of the magnetic pole members, and balls arranged in guide portions of said guide members, one of said guide members is fixed to said primary body, while the other of said guide members is so supported on said primary body as to be movable towards said one of the guide members, and is urged towards said one of the guide members by a spring, said secondary body is plate-like, and cutout portions formed along the lengthwise sides of said secondary body ride on said balls, said balls being softly pinched between said cutout portions of the secondary body and said guide portions of the guide members.
Claim 24
Dependent Claim
37 words
A liner pulse motor according to claim 22 in which the rolling range of said balls are limitted to a certain extent in the moving direction of said one of the primary body and the secondary body.
Claim 25
Dependent Claim
103 words
A linear pulse motor according to claim 21, in which said coils are energized in such a manner that one of said coils is energized in positive polarity for a predetermined time, at the same time as the deenergization of said one coil, the other of said coils is energized in positive polarity of the predetermined time, at the same time as the deenergization of said other coil, said one is energized in negative polarity for the predetermined time, and at the same time as the deenergization of said one coil, said other coil is energized in negative polarity for the predetermined time.
Claim 26
Dependent Claim
95 words
A linear pulse motor according to claim 24 in which the groups of said first plural teeth of the head portions of the magnetic pole members are shifted one another by a quarter of the pitch in the following order of: one of the head portions of one of said two pairs of the magnetic pole members, one of the head portions of the other of said two pairs, the other of the head portions of said one the two pairs, and the other of the head portions of said other of the two pairs.
Claim 27
Dependent Claim
205 words
A linear pulse motor according to claim 16, in which said guide means includes a pair of support members arranged on the outer side end portions of said head portions of the magnetic pole members along said leg portions of the magnetic pole members, a pair of guide members having generally L-shaped cross-section, arranged slidably along said support members, balls received by a pair of cutouts formed in a vertical portion of each of said guide members, and rolls received by a pair of cutouts formed in a horizontal portion of each of said guide members, one of said support members is fixed to said primary body, while the other of said support members is so supported on said primary body as to be movable towards said one of the support members, and is urged towards said one of the support members by a spring, said secondary body is plate-like, cutout portions formed along the lengthwise sides of said secondary body ride on said rolls, said balls are softly pinched between the lengthwise sides of said secondary body and said support members for guiding the movement of said one of the primary body and secondary body, and said air gap is maintained by said rollers.
Claim 28
Dependent Claim
39 words
A linear pulse motor according to claim 26, in which stoppers are fixed to said primary body at such positions that the slide movements of said guide members along said support members are limited to a predetermined length thereby.
Claim 29
Dependent Claim
210 words
A linear pulse motor according to claim 21, in which said guide means includes a pair of support members arranged at both sides of the groups of said head portions of the magnetic pole members in a substantially perpendicular direction to said leg portions of the magnetic pole members, a pair of guide members having generally L-shaped cross-section, arranged slidably along said support members, balls received by a pair of cutouts formed in a vertical portion of each of said guide members, and rolls received by a pair of cutouts formed in a horizontal portion of each of said guide members, one of said support members is fixed to said primary body, while the other of said support members is so supported on said primary body as to be movable towards said one of the support members, and is urged towards said one of the support members by a spring, said secondary body is plate-like, cutout portions formed along the lengthwise sides of said secondary body ride on said rolls, said balls are softly pinched between the lengthwise sides of said secondary body and said support members for guiding the movement of said one of the primary body and secondary body, and said air gap is maintained by said rollers.
Claim 30
Dependent Claim
39 words
A linear pulse motor according to claim 28, in which stoppers are fixed to said primary body at such positions that the slide movements of said guide members along said support members are limited to a predetermined length thereby.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |