JP2003032995A - Cylinder-type linear synchronous motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder-type linear synchronous motor, which can use a linear resolver in order to detect a position of a needle, without increasing the dimension in the axial line direction of the motor. SOLUTION: A magnetic flux change generating part 53 of the linear resolver 37 is arranged in parallel with a rod member 61 which constitutes a linear movement member, and fixed to a direct-acting shaft 15 via a plate member 16, so as to move together with the rod member 61 within a moving range of the rod member 61. A detection coil unit 41 of the linear resolver 37 is turned into a fixed state, together with a stator 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder type linear synchronous motor in which a mover moves linearly.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 11-332211, Japanese Unexamined Patent Publication (Kokai) No. 2000-262034, etc. disclose the structure of a conventional cylinder type linear synchronous motor proposed by the applicant. The conventional cylinder type linear synchronous motor uses an expensive position detector called a linear scale that optically detects the position of the mover.

[0003]

However, the cost of the optical position detector is high, which has been an obstacle to reducing the cost of the cylinder type linear synchronous motor. A general linear motor uses a resolver called a linear resolver that detects linear movement of a mover, as disclosed in, for example, Japanese Patent Laid-Open No. 2001-86729.
However, as far as the applicant knows, the linear resolver is not adopted in the cylinder type linear synchronous motor. This is because it was thought that if a linear resolver was adopted in a cylinder type linear synchronous motor, the axial dimension of the motor had to be lengthened.

An object of the present invention is to provide a cylinder type linear synchronous motor in which a linear resolver can be used for detecting the position of a mover without increasing the axial dimension of the motor.

Another object of the present invention is to provide a cylinder type linear synchronous motor having a linear resolver, which has a smaller axial dimension than existing motors.

[0006]

SUMMARY OF THE INVENTION A cylinder type linear synchronous motor to be improved by the present invention is a linear motion shaft that reciprocates in the axial direction, a movable element fixed to the linear motion axis, and a movable element of this movable element. A stator that is arranged outside and that generates a thrust force that moves the mover in the axial direction between the mover and the mover, a mover support structure that supports the mover so that the mover can move in the axial direction, and the mover is a direct drive shaft It is equipped with one or more detent structures for preventing rotation around the center and a linear resolver for detecting the position of the mover.

As the mover, for example, a linear motion shaft that reciprocates in the axial direction, and a magnet mounting portion fixed to the linear motion shaft,
It is possible to use one having one or more permanent magnet rows that are fixed to the magnet mounting portion and that are arranged in the axial direction of the linear motion shaft and that are composed of a plurality of permanent magnets. In this case, the plurality of permanent magnets forming one permanent magnet row may be a plurality of physically combined permanent magnets, or one magnetic body may be alternately arranged as N poles in the longitudinal direction. It may be a plurality of permanent magnets magnetized to the S pole. When there are a plurality of permanent magnet rows, it is preferable to arrange the plurality of permanent magnet rows at substantially equal intervals in the circumferential direction. However, an assembly of permanent magnet rows may be configured using an annular permanent magnet that is magnetized so that the N pole or the S pole appears on the outer surface in the radial direction.

The stator is formed, for example, by winding a winding conductor in an annular shape, and is arranged at a predetermined interval in the axial direction and is arranged so as to surround the periphery of the mover. Can be used. in this case,
The stator has a plurality of magnetic pole portions facing the permanent magnet array of the mover with a predetermined gap and a yoke magnetically connecting the plurality of magnetic pole portions, and corresponds to two adjacent magnetic pole portions. The stator core unit includes a plurality of magnetic pole portions axially spaced from each other so as to form a slot for receiving at least a part of the annular winding. Here, the slot has an opening that opens toward the mover and a winding receiving portion that receives at least a portion of the annular winding.

The linear resolver is provided with a magnetic flux change generating section that is displaced together with the detection coil unit that outputs a position detection signal and the mover to change the magnetic flux that links the detection coil unit. The detection coil unit has a phase of 90.
It can be composed of two or more coils that output different detection signals. Further, the magnetic flux change generator can be made of, for example, a magnetically conductive material forming a part of a magnetic path of a magnetic flux flowing through each coil of the detection coil unit.

The at least one detent structure is fixed to the direct acting shaft or the mover and linearly moves together with the direct acting shaft or the mover along an imaginary parallel line extending parallel to the axis of the direct acting shaft. The linear moving member and the stator are placed in a fixed state to allow the linear moving member to move in a direction along the virtual parallel line and prevent the linear moving member from rotating about the linear axis. And a linear movement member receiving portion that receives the linear movement member.

In the first aspect of the invention, the magnetic flux change generating portion of the linear resolver is arranged in parallel with the linear moving member, and the linear moving shaft is moved so as to move together with the linear moving member within the moving range of the linear moving member. Alternatively, it is fixed to the mover, and the detection coil unit of the linear resolver is placed in a fixed state together with the stator. By doing so, the linear motion shaft, the linear movement member of the rotation stopping mechanism, and the magnetic flux change generating portion of the resolver sensor are arranged in parallel with each other. As a result, without increasing the axial dimension of the motor,
A linear resolver can be arranged within the moving range of the linear drive shaft.

When a pair of end brackets each having a pair of bearings for supporting the linear motion shaft are arranged on both sides of the stator in the axial direction, the following configuration may be adopted. That is, the plate member is fixed to one end of the linear motion shaft protruding outward from one end bracket,
The magnetic flux change generator and the linear movement member are fixed to this plate member. Further, the linear movement member receiving portion and the detection coil unit are fixed to one end bracket. With this structure, the detent mechanism and the linear resolver can be arranged in parallel with the linear axis with a simple structure.

In the above description, the plate member is provided at one end of the linear motion shaft, and the linear resolver and the movable member of the rotation stopping mechanism are fixed to the plate member. However, these movable elements are fixed to the movable element. May be. In this case, the magnetic flux change generating portion of the linear resolver and the linear movement member of the rotation stopping mechanism project from the inside to the outside of the motor. With such a structure, one end of the linear motion shaft can be made free, so that the linear motion shaft and the load can be easily connected.

When a linear resolver is provided separately from the rotation stopping structure, as a basic premise, the motor is provided with a pair of bearing portions which are arranged on both sides of the stator in the axial direction and which support the linear drive shaft. It shall be equipped with end brackets. The detent structure is provided on one side of the pair of end brackets in order to prevent the mover from rotating around the linear motion shaft. In such a case, the detection coil unit is fixed to the other of the pair of end brackets.

In the first aspect of the invention, the whirl-stop mechanism and the linear resolver are provided separately, but the linear resolver can also be configured to perform the function of the whirl-stop mechanism. In that case, the magnetic flux change generating portion of the linear resolver is provided on the linear moving member side of the rotation preventing structure, and the detection coil unit of the linear resolver is provided on the linear moving member receiving portion side of the rotation preventing structure. For example, the magnetic flux change generator may be a rigid rod to form a linear movement member. Further, specifically, the linear moving member can be configured by a pipe having a hollow portion whose one end is open to the linear moving member receiving portion side, and the linear moving member receiving portion can be configured by a cylinder that receives this pipe. And the magnetic flux change generating part is a rod shape arranged in the hollow part of the pipe, the detection coil unit is located in the central part of the cylinder,
It can be configured as a cylindrical coil structure that enters the hollow portion of the pipe and receives the rod-shaped magnetic flux change generating portion. When such a structure is adopted, the cylinder resolver can be arranged inside one rotation stopping mechanism.

Further, the detection coil unit can be concentrically arranged outside the bearing portion fixed to the other end bracket. In this case, the magnetic flux change generating portion of the linear resolver is fixed to the direct acting shaft or the mover. If the detection coil unit is arranged concentrically with the bearing portion, it is not necessary to elongate the linear motion shaft in order to provide the detection coil unit. Therefore, even when the rotation stopping structure is not used, the linear resolver can be attached to the motor without increasing the axial dimension of the motor. In this case, the detent mechanism can be provided using the other end bracket. However, since the resolver itself can allow the movement in the rotation direction, when the detection coil unit is arranged concentrically with the bearing portion, the rotation stopping mechanism is not necessarily required.

When a cover member is provided on one of the end brackets so as to cover the detent structure, arranging the linear resolver as follows eliminates the need to lengthen the axial dimension of the motor. First, the detection coil unit of the linear resolver is fixed to the cover member. Then, the magnetic flux change generating portion of the linear resolver is fixed to one end of the linear motion shaft located inside the cover member.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described in detail. FIG. 1 is a partially cutaway sectional view of a cylinder type linear three-phase synchronous motor 1 previously proposed by the applicant, which is a premise of the present invention and is used for explaining an example of an embodiment of the present invention. Note that this drawing is a cross-sectional view taken along the line I-I of FIG. 3 and expanded for easy understanding. 2 is a plan view of the motor shown in FIG. 1, and FIG. 3 is shown in FIG.
3 is a left side view of the motor of FIG. In these figures, a case 3 of the cylinder type linear three-phase synchronous motor 1 includes a cylinder type frame 5 made of a non-magnetic material (for example, aluminum) and a pair of end brackets 7 made of aluminum.
And 9.

A linear shaft 15 made of iron is supported by the pair of linear bearings 11 and 13 for linear reciprocal movement. The state shown in FIG. 1 is a state in which the output shaft portion 15a to which the load of the linear drive shaft 15 is connected is projected to the outermost side. Case 3
A magnet mounting body 17 made of iron, which is a magnetic material, is fixed to a portion of the direct drive shaft 15 located inside the so as to be concentric with the direct drive shaft 15. The linear motion shaft 15 to which the magnet mounting body 17 is fixed is integrally formed with a ridge portion extending in the axial direction, and the ridge portion is fitted to the inner peripheral portion of the magnet mounting body 17. A keyway is formed. The magnet mounting body 17 basically has a cylindrical shape or a rectangular tube shape. The outer peripheral surface of the magnet mounting body 17 constitutes a magnet mounting portion 19. The magnet mounting portion 19 has a substantially cylindrical shape extending in the axial direction of the linear drive shaft 15, and eight annular permanent magnets 21 ... Are linearly arranged along the linear drive shaft 15 on the outer periphery thereof. The six permanent magnet rows 23 thus configured are fixed. In this example, the linear motion shaft 15, the magnet mounting body 17, and the permanent magnet array 23 constitute a mover 25.

The stator core units 27 ... Are fixed to the inner peripheral portion of the frame 5. Stator core unit 27
Is the magnetic pole surface 27 in the radial direction of the base portion fixed to the inner peripheral side of the frame 5, that is, the yoke 27 a and the linear motion shaft 15.
Have a plurality of magnetic pole portions 27b, which are opposed to the permanent magnet array 23 formed by the permanent magnets 21 and are arranged at predetermined intervals in the axial direction of the linear motion shaft 15. Since the structure of the stator core unit 27 is known, the description is omitted. A part of an annular winding 29, which constitutes an exciting winding formed by winding a winding conductor in an annular shape, is fitted into a slot formed between two adjacent magnetic pole portions 27b of each stator core unit 27. Have been combined. In this example, the stator 31 is constituted by the stator core units 27 and the annular windings 29.

The end bracket 7 located on one side of the stator 31 in the axial direction has two imaginary parallel lines extending parallel to the axis of the linear motion shaft 15 as its centers.
Is formed with two through holes 33 and 35 penetrating in the thickness direction (axial direction). In FIG. 1, the two through holes 33
3 and 35 are shown to be formed at 180 ° apart, but as can be seen from FIG. 3, the two through holes 33 and 35 are lined up at an angular interval of several tens of degrees. A bottomed cylinder or cylinder 39 forming a part of the linear resolver 37 is fitted into one of the through holes 33. The cylinder 39 is open toward the outside of the end bracket 7, and the connector portion 43 of the detection coil unit 41 is fitted into a through hole provided in the bottom portion (wall portion located on the side of the stator 31) of the cylinder 39. Has been done. The plurality of lead wires 45 extending from the connector portion 43 are connected to electrodes in a circuit pattern on a circuit board 49 arranged in a board case 47 provided outside the frame 5. On this circuit board 49, electrical components that form a signal processing circuit of the linear resolver 37 are mounted. Board case 4
A connector for external connection is connected to 7.

The detection coil unit 41 is provided with a tubular coil structure 51 including four annular coils arranged in a straight line and wired so as to output two position detection signals having 90 ° different phases. . The linear resolver 37 includes a rod-shaped magnetic flux change generator 53 that displaces the inside of the tubular coil structure 45 of the detection coil unit 41 in a direction parallel to the axial direction. This magnetic flux change generation unit 53
It has a structure in which magnetic bodies and non-magnetic bodies are alternately arranged so as to be displaced together with the mover 25 or the linear motion shaft 15 to change the magnetic flux interlinking with the coil of the detection coil unit 41. The base of the magnetic flux change generator 53 is fixed to the fixed cap 55. The main parts of the fixed cap 55 and the magnetic flux change generator 53 are housed inside a metal pipe 57. The pipe 57 is connected to the end portion 1 of the linear motion shaft 15.
It is fixed to the plate member 16 fixed to 5a.
The pipe 57 is fitted in the cylindrical space formed between the cylinder 39 and the tubular coil structure 51 so as to be movable in the direction parallel to the axial direction inside the cylindrical space.

The linear resolver 27 used in this embodiment is sold by Amitech Co., Ltd. under the name of Induct Scale (trademark).

Inside the through hole 35 of the end bracket 7, a pair of cylindrical bearings 5 forming a rotation-stopping structure.
9 is fitted. The pair of bearings 59 has a rod member 6 whose one end is fixed to the plate member 16.
1 is supported so as to be linearly movable along another virtual parallel line parallel to the axial direction. With this detent structure,
The bearing 59 constitutes the linear moving member receiving portion,
The rod member 61 constitutes a linear movement member.

The plate member 16 is one end 1 of the linear motion shaft 15.
It is fixed to 5a by bolts 63. The plate member 16 is formed with four screw holes 65 for connecting a load.

In the above example, if the linear resolver 27 is constructed so as to have sufficient mechanical strength, the linear resolver 27 can also be used as a detent structure. That is, it is possible to prevent rotation by using only the linear resolver 27. In that case, in the above example,
The pipe 57 constitutes a linear movement member that linearly moves together with the linear motion shaft 15 or the mover 25 along an imaginary parallel line extending parallel to the axis of the linear motion shaft 15, and the cylinder 39 together with the stator 31. A linear movement that is placed in a fixed state and that allows the pipe 57 as a linear movement member to move in a direction along an imaginary parallel line, and that receives the pipe 57 so as to prevent the pipe 57 from rotating about the linear axis 15. This will constitute the member receiving portion.

FIG. 4 is a sectional view of the second embodiment of the present invention. It should be noted that the same parts or parts as the parts or parts constituting the embodiment shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1 plus 100. In this embodiment, the linear resolver 13 is used as the rotation stopping structure.
7 is also used. Specifically, the magnetic flux change generating portion of the linear resolver is configured to be a linear movement member having a detent structure, and the detection coil unit of the linear resolver 137 is arranged on the linear movement member receiving portion side of the detent mechanism. . In this example, the pipe 157 of the linear resolver 137
Is fixed to the magnet mounting body 117 of the mover 125 of the motor 101 using the pipe fixing member 118. 140
Is an attachment for attaching the linear resolver 137 to the end bracket 107. According to this example, since the linear motion shaft 115 protruding outward from the end bracket 107 can be set in a free state, there is an advantage that the linear motion shaft 115 and the load can be freely connected.

FIG. 5 is a sectional view of the third embodiment of the present invention. It should be noted that the same parts or components as those of the embodiment shown in FIG. 1 are denoted by the same reference numerals as those in FIG. 1 plus 200. In this embodiment, a large linear resolver is used unlike the linear resolver used in the embodiments shown in FIGS. 1 to 4. In this example, the detection coil unit 251 is fixed to the end bracket 207. The detection coil unit 251 is concentrically arranged outside the bearing portion 211 fixed to the end bracket 207. A tubular cavity 208 is formed inside the detection coil unit 251 in the end bracket 207. This cavity 2
08 includes a plate member 21 fixed to the direct acting shaft 215.
The magnetic flux change generation unit 253 of the linear resolver fixed to 6
Are arranged so as to be movable in the axial direction. If the detection coil unit 251 is arranged concentrically with the bearing portion 211, in order to provide the detection coil unit 251, the linear motion shaft 215 is provided.
You don't have to lengthen it. In this example, the linear drive shaft 2
Since the rotation of 15 is allowed, no rotation prevention structure is provided.

FIG. 6 is a sectional view of the fourth embodiment of the present invention. It should be noted that the same parts or parts as the parts or parts constituting the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals as those in FIGS. 1 to 5 plus 300. . In this embodiment, the one end bracket 307 is provided with a detent structure. The other end bracket 309 is provided with the detection coil unit 351 that constitutes the linear resolver 337, and the cylindrical body 353 that constitutes the magnetic flux change generation unit is arranged on the mover.

FIG. 7 is a sectional view of the fifth embodiment of the present invention. It should be noted that the same parts or parts as the parts or parts constituting the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals as those in FIGS. 1 to 5 plus 400. . In this embodiment, the cover member 402 is attached to one end bracket 407 so as to cover the detent structure.
Is provided. The detection coil unit 451 of the linear resolver 437 is fixed to the cover member 402. The linear shaft 415 located inside the cover member 402
The magnetic flux change generation part 451 of the linear resolver is fixed to one end of the.

[0031]

According to the present invention, since the magnetic flux change generating portion of the linear resolver is provided on the linear moving member side of the rotation preventing structure, and the detection coil unit of the linear resolver is provided on the linear moving member receiving portion side of the rotation preventing structure. The linear resolver can be arranged by utilizing the structure of the rotation preventing structure without making the linear motion shaft longer than the conventional one. Therefore, according to the present invention, the linear resolver can be installed without increasing the axial dimension of the motor and without significantly changing the basic structure of the motor.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a cylinder type linear three-phase synchronous motor previously proposed by the applicant, which is a premise of the present invention and is used for explaining an example of an embodiment of the present invention.

FIG. 2 is a plan view of the motor shown in FIG.

FIG. 3 is a left side view of the motor shown in FIG.

FIG. 4 is a cross-sectional view of a second embodiment of the present invention.

FIG. 5 is a sectional view of a third embodiment of the present invention.

FIG. 6 is a cross-sectional view of a fourth embodiment of the present invention.

FIG. 7 is a sectional view of a fifth embodiment of the present invention.

[Explanation of symbols]

1 cylinder type linear three-phase synchronous motor 15 Linear motion shaft 17 Magnet mount 21 annular permanent magnet 25 mover 31 Stator 37 Linear resolver 39 Linear moving member receiving part 41 Detection coil unit 53 Magnetic flux change generator 57 Linear movement member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideyuki Ishii             1-15-1 Kitaotsuka, Toshima-ku, Tokyo Sanyo             Electric Co., Ltd. (72) Inventor Shinji Suzuki             1-15-1 Kitaotsuka, Toshima-ku, Tokyo Sanyo             Electric Co., Ltd. (72) Inventor Satoru Onodera             1-15-1 Kitaotsuka, Toshima-ku, Tokyo Sanyo             Electric Co., Ltd. F-term (reference) 5H611 AA01 BB09 PP05 QQ03 UA01                       UB00                 5H641 BB06 BB14 BB19 GG02 GG04                       GG07 GG11 GG12 GG26 HH03                       HH05 HH06 JA03 JA15 JA19

Claims (8)

[Claims] 1. A linear motion shaft that reciprocates in the axial direction and a mover fixed to the linear motion shaft, and the mover arranged outside the mover and the mover. A stator for generating a thrust force to move the movable element, a movable element support structure for movably supporting the movable element in the axial direction, and a block for preventing the movable element from rotating around the linear axis 1 The rotation preventing structure described above and a linear resolver that detects the position of the mover are provided, and the linear resolver is displaced together with the detection coil unit that outputs a position detection signal and the mover, and the detection coil unit. A magnetic flux change generating unit that changes a magnetic flux interlinking with, and the one or more rotation stopping structures are fixed to the linear motion shaft or the mover and are parallel to the axis line of the linear motion shaft. Along the extending virtual parallel line And a linear movement member that linearly moves together with the linear motion shaft or the mover, and a linear movement member that is placed in a fixed state together with the stator to allow movement of the linear movement member in a direction along the virtual parallel line. A cylinder type linear synchronous motor comprising: a linear movement member receiving portion that receives the linear movement member so as to prevent the linear movement member from rotating about the linear movement axis. The magnetic flux change generation unit is fixed to the linear motion shaft or the mover so as to be arranged in parallel with the linear movement member and move together with the linear movement member within the movement range of the linear movement member, A cylinder type linear synchronous motor, wherein the detection coil unit of the linear resolver is placed in a fixed state together with the stator. 2. A pair of end brackets each having a pair of bearings for supporting the linear motion shaft are arranged on both sides of the stator in the axial direction, and the pair of end brackets project outward from one of the end brackets. A plate member is fixed to one end of the linear motion shaft, the magnetic flux change generation unit and the linear movement member are fixed to the plate member, the linear movement member receiving unit and the detection coil. The unit is fixed to the one end bracket.
Cylinder type linear synchronous motor described in. 3. A linear motion shaft reciprocating in the axial direction and a mover fixed to the linear motion shaft, and the mover arranged outside the mover and arranged between the mover and the mover in the axial direction. A stator for generating a thrust force to move the movable element, a movable element support structure for movably supporting the movable element in the axial direction, and a block for preventing the movable element from rotating around the linear axis 1 The rotation preventing structure described above and a linear resolver that detects the position of the mover are provided, and the linear resolver is displaced together with the detection coil unit that outputs a position detection signal and the mover, and the detection coil unit. A magnetic flux change generating unit that changes a magnetic flux interlinking with, and the one or more rotation stopping structures are fixed to the linear motion shaft or the mover and are parallel to the axis line of the linear motion shaft. Along the extending virtual parallel line And a linear movement member that linearly moves together with the linear motion shaft or the mover, and a linear movement member that is placed in a fixed state together with the stator to allow movement of the linear movement member in a direction along the virtual parallel line. A cylinder type linear synchronous motor comprising: a linear movement member receiving portion that receives the linear movement member so as to prevent the linear movement member from rotating about the linear movement axis. A cylinder type linear synchronous motor characterized in that a magnetic flux change generating section is provided on the linear moving member side, and the detection coil unit of the linear resolver is provided on the linear moving member receiving section side. 4. The linear movement member is formed of a pipe having a hollow portion whose one end is open to the linear movement member receiving portion side, the linear movement member receiving portion is a cylinder that receives the pipe, and the magnetic flux change generating portion is formed. Has a rod shape arranged in the hollow portion of the pipe, the detection coil unit is located in the central portion of the cylinder, enters the hollow portion of the pipe, and generates a change in the rod-shaped magnetic flux. The cylinder type linear synchronous motor according to claim 3, wherein the cylinder type linear synchronous motor is configured as a tubular coil structure that receives a portion. 5. A pair of end brackets respectively provided with a pair of bearing portions supporting the linear motion shaft are arranged on both sides of the stator in the axial direction, and project from the one end bracket to the outside. 5. The cylinder according to claim 4, wherein a plate member is fixed to one end of the linear motion shaft, the pipe is fixed to the plate member, and the cylinder is fixed to the one end bracket. Type linear synchronous motor. 6. A pair of end brackets respectively provided with a pair of bearing portions supporting the linear motion shaft are arranged on both sides of the stator in the axial direction, and a pipe fixing member is provided on the mover. The cylinder type linear synchronous motor according to claim 4, wherein the cylinder is fixed, the pipe is fixed to the pipe fixing member, and the cylinder is fixed to the one end bracket. 7. A linear moving shaft that reciprocates in the axial direction and a mover fixed to the linear moving shaft, and the mover arranged outside the mover and the mover, the mover being arranged in the axial direction. A stator for generating a thrust force to move the stator, a mover support structure for movably supporting the mover in the axial direction, and a stator arranged on both sides of the stator in the axial direction to support the linear motion shaft. A pair of end brackets each having a pair of bearings, and a detent structure provided on one side of the pair of end brackets to prevent the mover from rotating about the linear axis. And a linear resolver for detecting the position of the mover, wherein the linear resolver is displaced together with the detection coil unit that outputs a position detection signal and the mover and is a magnetic link that interlinks with the detection coil unit. A cylinder-type linear synchronous motor having a magnetic flux change generator that changes a bundle, wherein the detection coil unit is fixed to the other of the pair of end brackets, and the detection coil unit is fixed to the other end bracket. A cylinder type linear synchronous motor, which is concentrically arranged outside the bearing portion, and wherein the magnetic flux change generating portion of the linear resolver is fixed to the linear motion shaft or the mover. 8. A linear moving shaft that reciprocates in the axial direction and a mover fixed to the linear moving shaft, and the mover arranged outside the moving member and the mover. A stator for generating a thrust force to move the stator, a mover support structure for movably supporting the mover in the axial direction, and a stator arranged on both sides of the stator in the axial direction to support the linear motion shaft. A pair of end brackets each having a pair of bearings, and a detent structure provided on one side of the pair of end brackets to prevent the mover from rotating about the linear axis. And a linear resolver for detecting the position of the mover, wherein the linear resolver is displaced together with the detection coil unit that outputs a position detection signal and the mover and is a magnetic link that interlinks with the detection coil unit. A cylinder type linear synchronous motor having a magnetic flux change generation unit for changing a bundle, comprising a cover member fixed to the one end bracket so as to cover the detent structure, and the cover member of the linear resolver. The cylinder-type linear synchronous motor, wherein the detection coil unit is fixed, and the magnetic flux change generating section of the linear resolver is fixed to one end of the linear motion shaft located inside the cover member.