JP2009213253A - Stator structure with core for cylindrical linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-torque stator structure with a core for a cylindrical linear motor, in which a plurality of stator core pieces constitute a ring-shaped stator body formed of ring-shaped polygons and a ring-shaped winding bobbin having stator coils is attached to the ring-shaped stator body. <P>SOLUTION: Each stator with a core includes the ring-shaped stator body (1) formed disposing a plurality stator core pieces (2) in a polygonal ring shape and the ring-shaped winding bobbin (14) mounted through a stepped portion (11) of the stator core piece (2) and having the stator coils (3). The stator structure with a core for a cylindrical linear motor is configured by laminating the plurality of stator bodies (1) with the circular winding bobbins (14) in the axial direction (A). <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a cored stator structure of a cylindrical linear motor, and in particular, a plurality of stator core pieces as a ring-shaped stator body made of a ring-shaped polygon, and a ring-shaped winding bobbin having a stator coil is attached to the ring-shaped stator body, The present invention relates to a new improvement for a high torque type with a core.

As a conventional stator structure of this type of linear motor, for example, the configuration disclosed in Patent Document 1 can be listed in FIG.
That is, what is denoted by reference numeral 1 in FIG. 5 is a ring-shaped stator body in which stator core pieces 2 and stator coils 3 made of U, V, and W phases are alternately arranged along the axial direction on the outer periphery of a casing (not shown). In the ring-shaped stator body 1, a linear moving body 4 in which N poles and S poles are alternately magnetized along the axial direction is movably provided.
Therefore, in the above-described configuration, when an excitation signal is supplied to the stator coil 3, the linear moving body 4 is continuously or intermittently generated by a known magnetic action of each stator coil 3 and the linear moving body 4 by the excitation signal. Linear movement can be performed.

JP 2005-204449 A

Since the conventional linear motor stator structure is configured as described above, the following problems exist.
That is, a plate-shaped stator core piece must be disposed between each stator coil, and it is difficult to reduce the manufacturing cost, and it is difficult to obtain a large torque by increasing the magnetic force on the linear moving body. there were.

  The cored stator structure of the cylindrical linear motor according to the present invention includes a ring-shaped stator body in which a plurality of stator core pieces are arranged in a polygonal ring shape, stepped portions formed on the inner surface of each stator core piece, An annular winding bobbin provided inside each stator core piece via a step portion, a stator coil provided on the annular winding bobbin, and formed at both ends along the axial direction of the outer surface of each stator core piece. A plurality of ring-shaped stator bodies having the ring-shaped winding bobbins, and a plurality of ring-shaped stator bodies having the ring-shaped winding bobbins are stacked in the axial direction, and the protrusions of the stator core pieces and the outer circumferential step portions engage with each other. Also, a pair of first and second tongue pieces are formed at both ends along the axial direction of the inner surface of each stator core piece, the first tongue piece is located on the step portion side, and the second tongue piece is Stepped side of the other stator core piece The ring-shaped winding bobbin has a U-shaped cross-section, and the tongue piece is in contact with the back of the ring-shaped winding bobbin; and The stator core pieces in the annular stator body are configured to be independent from each other and in contact with each other, and the stator core pieces in the annular stator body are connected to each other via a bendable hinge portion. The annular stator body is an octagonal structure, and the annular stator body is inserted and stacked in a cylindrical case, and each stator core piece Is a configuration in which the overall shape is L-shaped.

Since the stator structure with a core of the cylindrical linear motor according to the present invention is configured as described above, the following effects can be obtained.
That is, since the stator core pieces each having an L-shape as a whole are arranged in a polygonal shape in a ring shape, each stator core piece has a larger shape than the conventional one, so that a larger thrust than the conventional one is obtained. The manufacturing cost can be reduced by automatic assembly.
In addition, since the annular winding bobbin having the stator coil is engaged with the step portion formed on each stator core piece and held by one or a pair of tongue pieces, the annular winding bobbin can be fixed to the annular stator body. It is easy and reliable and can improve productivity.

  The present invention relates to a cylindrical linear motor having a high-torque type with a core, in which a plurality of stator core pieces are formed into a ring-shaped stator body having a ring-shaped polygon, and a ring-shaped winding bobbin having a stator coil is mounted on the ring-shaped stator body An object of the present invention is to provide a stator structure with a core.

A preferred embodiment of a stator structure with a core of a cylindrical linear motor according to the present invention will be described below with reference to the drawings.
In addition, the same code | symbol is demonstrated to the part which is the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a ring-shaped stator body, and this ring-shaped stator body 1 is configured by connecting a plurality of stator core pieces 2 in a ring shape, and each stator core piece 2 is shown in FIG. As shown, the overall shape is L-shaped.

As shown in FIGS. 1 and 2, each stator core piece 2 is formed in an L shape by a step portion 11 formed on the inner surface 10 side thereof, and both ends along the axial direction A on the inner surface 10 side. The first and second tongue pieces 12 and 13 are integrally formed, and the first tongue piece 12 and the second tongue piece 13 are extended in different directions.
The first tongue piece 12 is located on the step portion 11 side, and the second tongue piece 13 is located on the step portion 11 side of the adjacent stator core piece 2.

  Each step portion 11 formed in each stator core piece 2 is mounted in a state in which a ring-shaped winding bobbin 14 having an overall shape formed in a ring shape and having a stator coil 3 is engaged. The annular winding bobbin 14 is securely fixed to each stator core piece 2 by contacting only the first tongue piece 12 or the tongue pieces 12 and 13 facing each other on the back portion 14a as the inner peripheral surface. can do.

  Accordingly, each of the stator core pieces 2 and the annular winding bobbin 14 constitutes one annular stator body 1, and a plurality of the annular stator bodies 1 are stacked to form a shaft as shown in FIGS. 1 and 2. A cored stator 20 having a cylindrical shape along the direction A can be configured.

  Further, as described above, when the stator core pieces 2 are stacked in a multi-stage shape along the axial direction A, the protrusions 16 and the outer peripheral stepped portions 17 are provided at both ends along the axial direction A on the outer surface 15 side of the stator core pieces 2. Therefore, when the respective ring-shaped stator bodies 1 are laminated, the outer surface 15 of each stator core piece 2 is surfaced along the axial direction A by engaging the protrusions 16 and the outer peripheral step portions 17 adjacent to each other. It can be laminated in a single state.

  Each stator core piece 2 in the ring-shaped stator body 1 is fixed, for example, as a ring shape by using a jig (not shown) or a slit in a longitudinal member. And the stator core pieces 2 are connected to each other via a hinge portion 2b so as to be bendable.

Next, the configuration shown in FIG. 3 shows a case where the annular stator body 1 of FIG. 1 described above is laminated along the axial direction A to form the cored stator 20, which is located on the rightmost side of FIG. 3. The state which is laminated | stacked sequentially with respect to the ring-shaped stator body 1 to show is shown.
Next, the configuration shown in FIG. 4 shows a case where the cored stator 20 laminated in a multi-stage shape as described above is housed in a cylindrical case 30.
In addition, although the polygonal shape of the above-mentioned ring-shaped stator body 1 was described in the case of an octagon, it is needless to say that other than an octagon is possible.

It is a perspective view which shows the stator structure with a core of the cylindrical linear motor by this invention. It is sectional drawing of the principal part of FIG. It is a disassembled perspective view which shows the stator with a core of FIG. It is sectional drawing which shows the structure which mounted | wore the cylindrical case with the stator with a core of FIG. It is a perspective view which shows the stator structure of the conventional linear motor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator body 2 Stator core piece 2a Contact part 2b Hinge part 3 Stator coil 10 Inner surface 11 Step part 12 1st tongue piece 13 2nd tongue piece 14 Ring-shaped winding bobbin 14a Back part 15 Outer surface 16 Projection part 20 Core-attached stator

Claims (8)

  A ring-shaped stator body (1) formed by arranging a plurality of stator core pieces (2) in a polygonal ring shape, a step portion (11) formed on the inner surface (10) of each stator core piece (2), and An annular winding bobbin (14) provided inside each stator core piece (2) via each step (11), and a stator coil (3) provided on the annular winding bobbin (14), Protrusions (16) and outer peripheral step portions (17) formed at both ends along the axial direction (A) of the outer surface (15) of each stator core piece (2), and the annular winding bobbin (14) A plurality of ring-shaped stator bodies (1) having an axial direction (A) are stacked, and the protrusions (16) of the stator core pieces (2) are engaged with the outer peripheral step (17). A stator structure with a core for a cylindrical linear motor.   A pair of first and second tongue pieces (12, 13) are formed at both ends along the axial direction (A) of the inner surface (10) of each stator core piece (2), and the first tongue piece (12) 2. The cylinder according to claim 1, wherein the second tongue piece (13) is located on the step portion (11) side of the mating stator core piece (2). Type linear motor cored stator structure.   The annular winding bobbin (14) has a U-shaped cross-section, and the tongue pieces (12, 13) are in contact with the back part (14a) of the annular winding bobbin (14). The stator structure with a core of the cylindrical linear motor according to claim 1 or 2.   The stator with a core of a cylindrical linear motor according to any one of claims 1 to 3, wherein each stator core piece (2) in the ring-shaped stator body (1) is independent from and in contact with each other. Construction.   5. The cylindrical type according to claim 1, wherein the stator core pieces (2) in the annular stator body (1) are connected to each other via a bendable hinge part (2 b). Linear motor cored stator structure.   6. The stator structure with a core of a cylindrical linear motor according to claim 1, wherein the ring-shaped stator body (1) has an octagonal shape.   The stator structure with a core of a cylindrical linear motor according to any one of claims 1 to 6, wherein the annular stator body (1) is inserted and laminated in a cylindrical case (30).   The stator structure with a core of a cylindrical linear motor according to any one of claims 1 to 7, wherein each of the stator core pieces (2) has an L shape as a whole.

Images