JP2009213192A - Cylindrical linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical linear motor which can perform the attachment and detachment of parts at replacement of parts accompanying its long-term use. <P>SOLUTION: It includes a cylinder 20, which covers the internal predetermined region 22 of a center yoke 6 provided in the moving member 2 of a cylindrical linear motor 1, exchangeably and a cut 23 is formed in an annular section 6c on the center yoke side. Since the internal predetermined region 22 of the center yoke 6 is covered with the cylinder 20, the abrasion of the center yoke 6 is suppressed even if the cylindrical linear motor 1 is used for a long period. Therefore, it can cope with the parts replacement in long-term use without exchanging the center yoke 6. Moreover, in the case of taking out the used cylinder 20 at replacement of the cylinder 20, the cylinder 20 can be taken out easily by adding force to the right end 20a of the cylinder 20 through the cut 23, consequently the workability in replacement can be improved by that amount. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cylindrical linear motor that generates thrust by electromagnetic force.

As an example of a conventional cylindrical linear motor, there is a cylindrical linear motor disclosed in Patent Document 1. The cylindrical linear motor shown in Patent Document 1 is provided with a mover and a stator that are linearly movable relative to each other, and the mover has a cylindrical center yoke with a permanent magnet disposed on the outer peripheral side, and is fixed. The child has a cylindrical outer yoke in which a coil is disposed on the inner peripheral side, and a cylindrical rod that is integrated with the outer yoke and disposed on the inner side. A center yoke is disposed between the outer yoke and the cylindrical rod. It is inserted so as to be movable, and two bearings are interposed between the cylindrical rod and the center yoke, and the current flowing through the coil is controlled to generate a thrust for relative movement of the mover and the stator.
JP 2007-274820 A

  By the way, in the said prior art, a bearing and a center yoke inner peripheral part wear out by using for a long period of time. And it is necessary to replace worn parts. At this time, the bearing can be easily replaced. However, with regard to the wear on the inner peripheral portion of the center yoke, it is difficult to perform inner diameter cutting or honing processing because a strong magnetic permanent magnet is mounted on the outer peripheral side of the center yoke. Since many permanent magnets are mounted, it is not easy to replace only the center yoke. For this reason, regarding the wear on the inner peripheral portion of the center yoke, it is necessary to replace the center yoke assembly (center yoke with the permanent magnet assembled), and even an expensive permanent magnet must be replaced. It was bad and caused cost increase.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cylindrical linear motor that can be efficiently attached and detached at the time of parts replacement accompanying long-term use.

  The present invention provides first and second members which are linearly movable relative to each other, the first member has a cylindrical first member side yoke, and the second member includes a cylindrical outer yoke and A cylindrical or shaft-shaped guide member integrated with the outer yoke and disposed on the inner side of the outer yoke. The guide member serves as a bearing for the first member-side yoke inserted between the outer yoke and the outer yoke. And a coil or a permanent magnet is selectively disposed on each of the outer yoke and the first member side yoke, and controls the current flowing in the coil to prevent relative movement of the first and second members. In the cylindrical linear motor for generating a thrust, a cylindrical body is detachably fitted so as to cover a predetermined region inside the first member side yoke.

  According to the present invention, it is possible to efficiently perform attachment / detachment at the time of component replacement accompanying long-term use.

  Hereinafter, a cylindrical linear motor according to a first embodiment of the present invention will be described with reference to FIG. 1A and 1B show a cylindrical linear motor according to a first embodiment of the present invention, in which FIG. 1A is a sectional view schematically showing the cylindrical linear motor, and FIG. 1B is a center yoke and cylinder of FIG. It is a front view of the arrow B of (A) which shows a solid body. (C) is a front view of arrow B of (A) showing a modification of the first embodiment.

1A, 1B, and 1C, a cylindrical linear motor 1 includes a mover 2 (first member) and a stator 3 (first member) that are relatively movable in the left-right direction in FIG. 2 member), and a current flowing in a coil 4 to be described later is controlled to generate a thrust for relative movement of the mover 2 and the stator 3 to cause the mover 2 and / or the stator 3 to move linearly.
The mover 2 has a cylindrical center yoke 6 in which a permanent magnet 5 is disposed on the outer peripheral side. The center yoke 6 has a base end portion (hereinafter referred to as a center yoke base end portion 6a) attached to an unsprung mounting flange (hereinafter referred to as an unsprung mounting flange 7) of the vehicle.

The stator 3 generally holds a bottomed cylindrical outer yoke 9 having a core 9a and the coil 4 attached to an inner peripheral portion thereof, and a cylindrical guide member 10 inserted into the outer yoke 9. It has a double cylinder shape.
The outer yoke 9 has a bottom 11 attached to a vehicle body (on a spring) by a mounting flange (hereinafter referred to as a vehicle body side mounting flange 12).
A stroke sensor 15 is interposed between the bottom 11 of the outer yoke 9 and the unsprung attachment flange 7 so as to be inserted into the cylindrical guide member 10.

Inside the front end portion 6b of the center yoke 6, first and second annular recesses 6m and 6n having a large diameter and a small diameter are formed with a step. The first annular recess 6m is formed with a female screw (reference numeral omitted) to which a screw member (hereinafter referred to as a center yoke tip side screw member 17) is screwed. Further, a bearing (hereinafter referred to as a first bearing 16) formed of a sliding bearing between the tip side portion 6b of the center yoke 6 and the cylindrical guide member 10 so as to be accommodated in the second annular recess 6n (one of claims 7). This is equivalent to the bearing of No.).
The displacement of the first bearing 16 in the left direction in FIG. 1A is regulated by a center yoke tip side screw member 17 screwed into a first annular recess 6m formed in the tip side portion 6b of the center yoke 6. . The center yoke tip side screw member 17 is not limited to a screw member as long as the axial displacement of the first bearing 16 can be restricted, and other means (for example, bolting) provided separately on the center yoke 6 are used. You may use the fixing member etc. which are fixed.
In the figure, reference numeral 18 denotes a plate interposed between the first bearing 16 and a cylindrical body 20 described later so as to be accommodated in the second annular recess 6n. It should be noted that the plate 18 is interposed for the purpose of protecting the bearing 16, and is not necessarily configured in the case of a linear motor with a small generated thrust.
The center yoke base end portion 6a has an annular portion (hereinafter referred to as a center yoke side annular portion 6c) that protrudes inward and can support one end portion of the cylindrical body 20 (the right portion in FIG. 1A). Is provided.

  The first and second annular recesses 6m and 6n (the respective placement portions of the first bearing 16, the center yoke distal end side screw member 17 and the plate 18) inside the center yoke 6 and the portions excluding the center yoke side annular portion 6c (hereinafter, referred to as “the first bearing 16”) The cylindrical body 20 is detachably fitted so as to cover the center yoke inner predetermined region 22. This corresponds to “a predetermined region on the inner side of the first member side yoke” in claim 1.

The cylindrical body 20 is press-fitted into the center yoke 6 by pressing in one direction (right direction in FIG. 1A) against the center yoke 6. The cylindrical body 20 is inserted into the center yoke 6 by the above-mentioned pressing, and is the right end of FIG. 1A (hereinafter referred to as the cylindrical body right end 20a. "Corresponding to the side end") is in contact with the center yoke side annular portion 6c, and in this state, the cylindrical body right end 20a is supported by the center yoke side annular portion 6c and press-fitted into the center yoke 6. It has become.
In addition, the other direction side end corresponding to the opposite side of the cylindrical body right end 20a in the cylindrical body 20 is hereinafter referred to as the cylindrical body left end 20b (the “other direction side of the cylindrical body” in the claims). It corresponds to the “end”.) Further, in the present embodiment, the left side portion in FIG. 1A from the left side end portion 20b of the cylindrical body in the tip side portion 6b of the center yoke 6 is “the other direction of the cylindrical body in the first member side yoke” according to claim 7. It corresponds to “a portion located on the other direction side from the side end”.

As shown in FIGS. 1A and 1B, the center yoke side annular portion 6c has a cylindrical body end surface 20d formed on the cylindrical body right end 20a of the cylindrical body 20 (claims). Are formed with a predetermined interval in the circumferential direction to expose the "contact portion that can be contacted from the other side of the side yoke of the first member"). The notch 23 is provided for the purpose of exposing the contact portion, and the number and position of installation can be selected as appropriate.
Between the front end side portion (left side portion of FIG. 1A) of the cylindrical guide member 10 and the center yoke 6 with which the cylindrical body 20 is fitted, a bearing made of a slide bearing (hereinafter referred to as a second bearing 24). (Corresponding to “the other bearing” in claim 7). ] Is interposed.
The cylindrical body 20 may be composed of either a magnetic body or a nonmagnetic body. When the cylindrical body 20 is a magnetic body, the permanent magnet 5, the center yoke 6 (magnetic body), and the cylindrical body 20 constitute a magnetic circuit, so that the thrust efficiency of the linear motor can be improved. On the other hand, when the cylindrical body 20 is composed of a non-magnetic body, it is not included in the magnetic circuit composed of the permanent magnet 5 and the center yoke 6, so that the attachment / detachment work is facilitated because no magnetic force acts.

In the cylindrical linear motor 1 configured as described above, the center yoke 6 has the center yoke inner predetermined region 22 covered with the cylindrical body 20, and the tip side portion 6b (first and second annular recesses) of the center yoke 6. 6m, 6n) is covered with the center yoke tip side screw member 17, the first bearing 16, and the plate 18, so that even if the cylindrical linear motor 1 is used for a long time, the wear of the center yoke 6 does not occur. It is suppressed. For this reason, when parts are replaced due to long-term wear, the first and second bearings 16 and 24 and the cylindrical body 20 can be replaced with new products, and the center yoke 6 need not be replaced. As a result, it is not necessary to replace the center yoke assembly (center yoke with permanent magnets) required in the above-described prior art.
Further, according to the first embodiment, when the cylindrical body 20 press-fitted into the center yoke 6 is taken out from the center yoke 6 when the cylindrical body 20 is attached / detached, the cylindrical body 20 is attached via an attaching / detaching jig (not shown). On the cylindrical body end surface 20d formed on the cylindrical body right end 20a of the body 20 (“contact part capable of contacting from the other side of the side yoke of the first member” in the claims). A force in the left direction in FIG. 1 (A) (“the other direction side opposite to one direction” in the claims) is applied. Then, the cylindrical body 20 easily moves in the left direction in FIG. 1A due to the applied force, whereby the cylindrical body 20 can be easily taken out, and the attachment / detachment workability can be improved accordingly.

In the first embodiment, the case where the notch 23 is provided for the purpose of exposing the cylindrical body end surface 20d (the contact portion) is described as an example, but instead, the inner diameter of the center yoke-side annular portion 6c is used. The dimensions are set to be larger than the inner diameter dimension of the cylindrical body 20 and smaller than the outer diameter dimension of the cylindrical body 20, thereby configuring the cylindrical body end surface 20 d to be exposed (hereinafter referred to as the first embodiment). It may be referred to as a modified example.
According to the modification of the first embodiment, when the cylindrical body 20 that is press-fitted into the center yoke 6 is taken out from the center yoke 6 when the cylindrical body 20 is attached or detached, the cylindrical body 20 is attached via an attaching / detaching jig (not shown). The cylindrical body end surface 20d formed on the cylindrical body right end 20a of the cylindrical body 20 (“contact portion capable of contacting from the other direction side of the side yoke of the first member” in the claims) A force in the left direction in FIG. 2A (“the other direction side opposite to one direction” in the claims) is applied. Then, as in the first embodiment, the cylindrical body 20 easily moves to the left in FIG. 2A due to the applied force, and thus the cylindrical body 20 can be easily taken out. The detachment workability can be improved.
You may comprise so that the structure of the modification of this 1st Embodiment may be combined with 1st Embodiment.

Next, a cylindrical linear motor according to a second embodiment of the present invention will be described with reference to FIG. 1 based on FIG. FIG. 3 is a cross-sectional view schematically showing a cylindrical linear motor 1A according to the second embodiment of the present invention.
Compared with the cylindrical linear motor 1 (FIG. 1) according to the first embodiment, the cylindrical linear motor 1A according to the second embodiment is (a) a center yoke-side annular portion 6c (notched) provided in the center yoke 6. 23), and the center yoke proximal end portion 6a has a cylindrical screw member (hereinafter, for convenience, a male screw is formed on the outer peripheral portion supporting the cylindrical body right end portion 20a of the cylindrical body 20. The center yoke base end screw member 27 (corresponding to the cylindrical body supporting member of claim 5) is provided by screwing, and (a) the first and second annular recesses 6m inside the center yoke 6. , 6n [the respective arrangement portions of the first bearing 16, the center yoke distal end side screw member 17 and the plate 18] and the portion excluding the arrangement portion of the center yoke proximal end side screw member 27 (hereinafter referred to as a center yoke inner predetermined region 22A). Term 1 is mainly different in that the cylindrical body 20 is detachably fitted so as to cover the “predetermined region inside the first member side yoke”. Other parts are the same as those of the cylindrical linear motor 1 according to the first embodiment, and description thereof will be omitted as appropriate.
The center yoke base end side screw member 27 is not limited to a screw member as long as it supports the one end side of the cylindrical body 20 and is detachable from the center yoke base end side portion 6a. A fixing member that is fixed by other means (for example, bolting) provided separately to the arm 6 may be used, or may be integrally provided on the center yoke 6 side of the unsprung mounting flange 7.

  According to the cylindrical linear motor 1A according to the second embodiment, the center yoke 6 has the center yoke inner predetermined region 22A covered with the cylindrical body 20, and the center yoke inner predetermined region 22A on the inner peripheral portion of the center yoke 6. Since the tip side portion 6b of the center yoke 6 is covered with the center yoke tip side screw member 17, the first bearing 16, the plate 18, and the center yoke base end side screw member 27, the cylindrical linear Even if the motor 1A is used for a long time, the wear of the center yoke 6 is suppressed. For this reason, the first and second bearings 16 and 24 and the tubular body 20 can be replaced with new products when used for a long period of time. Replacing the center yoke assembly (center yoke with permanent magnets) required in the prior art becomes unnecessary.

  In addition, according to the second embodiment, when the tubular body 20 press-fitted into the center yoke 6 is taken out from the center yoke 6 when the tubular body 20 is attached or detached, the center yoke proximal end screw member 27 is removed, A force in the left direction in FIG. 3 is applied to the cylindrical body end surface 20d formed on the cylindrical body right end 20a of the cylindrical body 20. Then, the cylindrical body 20 can be easily moved to the left by the applied force and taken out, so that the exchange workability can be improved accordingly.

Next, a cylindrical linear motor according to a third embodiment of the present invention will be described with reference to FIG. 1 based on FIG. FIG. 4 is a cross-sectional view schematically showing a cylindrical linear motor 1B according to the third embodiment of the present invention.
Compared with the cylindrical linear motor 1 according to the first embodiment, the cylindrical linear motor 1B according to the third embodiment eliminates the notch 23 of the center yoke-side annular portion 6c provided in the center yoke 6, and has a cylindrical shape. The cylindrical body right end portion 20a of the body 20 is provided with an annular portion (hereinafter referred to as a cylindrical body-side annular portion 20t) that protrudes inward and whose inner diameter is smaller than the inner diameter of the center yoke-side annular portion 6c. This is mainly different. Other parts are the same as those of the cylindrical linear motor 1 according to the first embodiment, and description thereof will be omitted as appropriate.

According to the cylindrical linear motor 1B according to the third embodiment, the center yoke 6 has the center yoke inner predetermined region 22 covered with the cylindrical body 20, and the tip side portion 6b of the center yoke 6 has the first bearing 16 and the center. Since the yoke tip side screw member 17 and the plate 18 are covered, the wear of the center yoke 6 is suppressed even when the cylindrical linear motor 1 is used for a long period of time. For this reason, the first and second bearings 16 and 24 and the tubular body 20 can be replaced with new products when used for a long period of time. Replacing the center yoke assembly (center yoke with permanent magnets) required in the prior art becomes unnecessary.
Further, according to the third embodiment, when the cylindrical body 20 is attached or detached, the cylindrical body end surface 20d formed on the cylindrical body side annular portion 20t of the cylindrical body 20 press-fitted into the center yoke 6 is provided. On the other hand, a force in the left direction in FIG. 4 is applied through the center yoke-side annular portion 6c. Then, the cylindrical body 20 can be easily moved to the left by the applied force and taken out, and the attachment / detachment workability can be improved accordingly.

Next, a cylindrical linear motor according to a fourth embodiment of the present invention will be described based on FIG. 5 and with reference to FIG. FIG. 5 is a sectional view schematically showing a cylindrical linear motor 1C according to the fourth embodiment of the present invention.
The cylindrical linear motor 1C according to the fourth embodiment is mainly different from the cylindrical linear motor 1A according to the second embodiment in that the following items (i) to (viii) are provided. Yes. The other parts are equivalent to the cylindrical linear motor 1A according to the second embodiment, and the description thereof is omitted as appropriate.

(I) Instead of the cylindrical body 20 fitted to the center yoke 6, a cylindrical body 20C having an outer diameter dimension slightly smaller than the inner diameter dimension of the center yoke 6 and inserted therein is provided.
(Ii) An annular recess 31 is formed in the center yoke base end side screw member 27 (corresponding to the cylindrical body support portion of claim 8) upon receiving the insertion of the right end portion 20a of the cylindrical body and abutting it. .
(iii) Instead of the first bearing 16, a bearing having a smaller shape than the first bearing 16 (hereinafter referred to as a small first bearing for convenience, corresponding to one of the bearings of claim 7) 16C is provided. The cylindrical guide member 32 having the bearing 16C mounted on the inner peripheral side is disposed so as to be accommodated in the second annular recess 6n.

(Iv) The cylindrical guide member 32 has a cylindrical guide member main body 32a whose outer diameter is slightly smaller than the shape without the second annular recess 6n, and inwardly on the inner peripheral side of the guide member main body 32a. An annular guide member inward projecting portion 32b that projects, and one surface side (right side in FIG. 5) of the guide member inward projecting portion 32b can contact the left end portion 20b of the cylindrical body of the cylindrical body 20C. The other surface side (left side in FIG. 5) is in contact with and supports the small first bearing 16C.
The cylindrical guide member 32 only needs to be able to protect the bearing 16 and support the end of the cylindrical body 20C. The shape is not limited, and the cylindrical guide member 32 is not necessarily configured such as in the case of a linear motor with a small generated thrust. In that case, you may give the said function to the small 1st bearing 16c.
(V) In the cylindrical body 20C, the center yoke proximal-side screw member 27 and the center yoke distal-side screw member 17 are screwed into the center yoke 6, so that the cylindrical body right-side end portion 20a becomes the center yoke proximal-side screw member. The cylindrical body left end 20b is pressed by the center yoke distal end side screw member 17 through the cylindrical guide member 32, and is fixed to the center yoke 6 in the axial direction and the radial direction. thing.
(Vi) First and second annular recesses 6m and 6n inside the center yoke 6 [respective arrangement portions of the center yoke tip side screw member 17 and the cylindrical guide member 32 (including the small first bearing 16C)] and the center The portion excluding the portion where the yoke base side screw member 27 is disposed (hereinafter referred to as a center yoke inner predetermined region 22C, which corresponds to the “predetermined region inside the first member side yoke” of claim 1) is covered. The cylindrical body 20C is inserted in a replaceable manner.

  According to the cylindrical linear motor 1C according to the fourth embodiment, the center yoke 6 has the center yoke inner predetermined region 22C covered with the cylindrical body 20C, and the tip side portion 6b of the center yoke 6 is the small first bearing 16C. Since the center yoke tip side screw member 17 and the cylindrical guide member are covered, the wear of the center yoke 6 is suppressed even when the cylindrical linear motor 1C is used for a long period of time. For this reason, the small first bearing 16C, the second bearing 24, and the cylindrical body 20C can be replaced with new products when used for a long period of time, and the center yoke 6 need not be replaced. Therefore, it is not necessary to replace the center yoke assembly (center yoke with permanent magnets) required in the prior art.

In addition, according to the fourth embodiment, the cylindrical body 20C is not press-fitted into the center yoke 6, but is simply inserted (“free fitting” in the scope of claims). The cylindrical body 20C can be easily taken out from the center yoke 6 by removing the center yoke base end side screw member 27. Therefore, the exchange workability can be improved.
Further, according to the fourth embodiment, the cylindrical body 20C is not inserted into the center yoke 6 but is simply inserted, and the center yoke 6 on the center yoke distal end side screw member 17 and the center yoke proximal end side screw member 27 are moved to the center yoke 6. Therefore, by adjusting the screwing amount of the screw members 17 and 27, a dimensional error in the axial method of the cylindrical body 20C can be allowed, and accordingly, the fixing to the center yoke 6 can be performed. Can be implemented reliably.
The center yoke front end side screw member 17 and the center yoke base end side screw member 27 are not limited to screw members as described above, and may be fixed by other methods.
In order to allow a dimensional error in the axial method of the cylindrical body 20C, only one of the center yoke distal end side screw member 17 and the center yoke proximal end side screw member 27 may have a screw structure. A fixing method may be selected. Moreover, when another dimensional error tolerance means is provided, both can be fixed methods other than the screw structure.

In each of the above embodiments, the case where the permanent magnet 5 is disposed in the center yoke 6 and the coil 4 is disposed in the outer yoke 9 is taken as an example. Instead, the coil 4 is disposed in the center yoke 6. The permanent magnet 5 may be arranged on the outer yoke 9.
In each of the above-described embodiments, the case where the cylindrical guide member 10 is used as the guide member is taken as an example. However, the present invention is not limited to this, and an axial guide member may be used. In this case, the stroke sensor 15 is provided in another part.

The cylindrical linear motor which concerns on 1st Embodiment of this invention is shown, (A) is sectional drawing which shows the cylindrical linear motor typically, (B) is the center yoke and cylindrical body of (A) ( It is a front view shown along B arrow of A). 1 shows a modification of the cylindrical linear motor according to the first embodiment of FIG. 1, (A) is a cross-sectional view schematically showing a part of the cylindrical linear motor, and (B) is a center yoke of (A). It is a front view which shows a cylindrical body along the B arrow of (A). It is sectional drawing which shows the cylindrical linear motor which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the cylindrical linear motor which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the cylindrical linita motor which concerns on 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A, 1B, 1C ... Cylindrical linear motor, 2 ... Movable element (first member), 3 ... Stator (second member), 4 ... Coil, 5 ... Permanent magnet, 6 ... Center yoke, 6c ... Center York-side annular portion (annular portion), 9 ... outer yoke, 10 ... cylindrical guide member (guide member), 16 ... first bearing (one bearing), 16C ... small first bearing (one bearing), 17 ... Center yoke tip side screw member (cylindrical body supporting member), 20... Cylindrical body, 20a... Right side end portion of cylindrical body (one side end portion of cylindrical body), 20b. End of the other side of the cylindrical body), 20d ... cylindrical body end surface (contact part), 22, 22C ... predetermined area inside the center yoke, 23 ... notch, 24 ... second bearing (the other bearing) 27 ... Center yoke proximal end screw member (cylindrical body support member), 32 ... Cylindrical guide member.

Claims (8)

First and second members are provided so as to be relatively movable linearly, the first member has a cylindrical first member side yoke, and the second member includes a cylindrical outer yoke and the outer yoke. It has a cylindrical or shaft-shaped guide member that is integrated and disposed inside, and the guide member guides the first member-side yoke inserted between the outer yoke and a bearing through a bearing. A coil or a permanent magnet is selectively disposed on each of the outer yoke and the first member side yoke, and a current flowing through the coil is controlled to generate a thrust for relative movement of the first and second members. In cylindrical linear motor,
A cylindrical linear motor, wherein a cylindrical body is detachably fitted so as to cover a predetermined area inside the first member side yoke.   2. The cylindrical linear motor according to claim 1, wherein the cylindrical body is press-fitted into the first member side yoke by pressing in one direction against the first member side yoke. motor.   3. The cylindrical linear motor according to claim 1, wherein an abutting portion capable of abutting one end portion on one side of the cylindrical body from the other direction side of the first member side yoke is provided, The cylindrical body can be separated from the state of being fitted to the first member side yoke by applying a force to the corresponding contact portion from the other direction opposite to the one direction. Cylindrical linear motor.   4. The cylindrical linear motor according to claim 3, wherein a portion of the first member-side yoke corresponding to an end portion on one side of the cylindrical body protrudes inwardly in the one direction of the cylindrical body. An annular part capable of supporting the side end part is formed, and the annular part is formed with a notch that exposes the one-side end part of the cylindrical body as the abutting part. Linear motor.   4. The cylindrical linear motor according to claim 3, wherein a portion of the first member side yoke corresponding to an end portion on one side of the cylindrical body supports a cylindrical body that supports one end of the cylindrical body. A cylindrical linear motor characterized in that a member is detachably provided.   4. The cylindrical linear motor according to claim 3, wherein a portion of the first member-side yoke corresponding to an end portion on one side of the cylindrical body protrudes inwardly in the one direction of the cylindrical body. An annular portion capable of supporting the side end portion is formed, and the cylindrical body side that protrudes inward as the abutting portion and has a smaller inner diameter than the annular portion is formed at one end portion of the cylindrical body. A cylindrical linear motor characterized by forming an annular portion.   7. The cylindrical linear motor according to claim 1, wherein the bearing is provided at two locations, and one of the bearings includes an end portion on one side of the cylindrical body in the first member side yoke and the other. A cylinder interposed between the guide member and a portion located on the other side of the direction side end, and another bearing interposed between the cylindrical body and the guide member Type linear motor.   2. The cylindrical linear motor according to claim 1, wherein a portion of the first member-side yoke corresponding to the one-direction side end and the other-direction end of the cylindrical body supports the cylindrical body. A cylindrical linear motor characterized in that a cylindrical body motor is provided, wherein the cylindrical body is restricted in movement in the axial direction and the radial direction by the cylindrical body support section, and is loosely fitted to the first member side yoke. .

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