Armature with housing for linear motor

Abstract

A housing-equipped armature according to the present disclosure is provided with: an armature having: a core serving as a main body; a coil provided on the core; and a resin part covering a part or all of the core and the coil. And a housing in which the armature can be accommodated. The housing has: a cylindrical housing main body that covers the outside of the armature; a first cover part for closing an opening on one axial end side of the housing main body; a first elastic body that seals a gap between the housing main body and the first cover part and attaches the first cover part to the housing main body; a second cover part for closing an opening on the other axial end side of the housing main body; and a second elastic body that seals a gap between the housing main body and the second cover part and attaches the second cover part to the housing main body.

Description

Technical Field

[0001] The present disclosure relates to an armature with a housing for a linear motor. Background Art

[0002] In recent years, linear motors have been proposed for use as drive devices for various industrial machines such as the head drive mechanism of OA equipment, the spindle of a machine tool, or the table conveying mechanism. In such a linear motor, an armature is used together with a magnet plate as an excitation magnetic pole. As the armature, there are known a type in which the core and the coil are molded and the resin is exposed, and a type in which a member obtained by molding the core and the coil with resin is housed in a housing.

[0003] Most linear motors are installed in machines that perform machining such as metalworking using a cutting fluid. Therefore, in a linear motor, the latter type of the above-described armature is used in consideration of dustproofness and waterproofness. In the latter type, when assembling the housing into a box shape, screws or welding is used.

[0004] Prior art documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019-115171 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] In the case of assembling the housing by welding, each component constituting the housing is welded to each other. Specifically, in a housing having an upper wall portion, a lower wall portion, a left wall portion, a right wall portion, a front wall portion, and a rear wall portion, these need to be welded individually. Therefore, in the case of assembling the housing by welding, the number of welding portions increases. If there are many welding portions, not only does the welding work take labor and time, but the possibility of causing welding defects may also increase.

[0009] Therefore, in order to eliminate the above problems, what is desired is an armature with a housing that uses a housing capable of reducing the number of welding portions.

[0010] Means for Solving the Problems

[0011] The armature with a housing according to the present disclosure includes: an armature having: a core serving as a main body; a coil provided on the core; and a resin portion covering part or all of the core and the coil; and a housing capable of accommodating the armature therein. The housing has: a cylindrical housing main body covering the outside of the armature; a first lid portion closing an opening on one axial end side of the housing main body; a first elastic body sealing a gap between the housing main body and the first lid portion and mounting the first lid portion on the housing main body; a second lid portion closing an opening on the other axial end side of the housing main body; and a second elastic body sealing a gap between the housing main body and the second lid portion and mounting the second lid portion on the housing main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. 6 is a perspective view of the armature with a housing according to the first embodiment of the present invention.

[0013] Figure 2 FIG. 10 is an exploded perspective view of the armature with a housing according to the first embodiment of the present invention, showing a state in which a part of the armature is pulled out from the housing for better understanding.

[0014] Figure 3 FIG. 14 is a perspective view of the first lid portion of the armature with a housing according to the first embodiment of the present invention, showing a state observed from the inside of the housing.

[0015] Figure 4 FIG. 18 is an exploded perspective view of the armature with a housing according to the second embodiment of the present invention, showing a state in which a part of the armature is pulled out from the housing.

[0016] Figure 5 FIG. 22 is an exploded perspective view of the armature with a housing according to the third embodiment of the present invention, showing a state in which a part of the armature is pulled out from the housing.

[0017] Figure 6 FIG. 26 is an exploded perspective view of the armature with a housing according to the fourth embodiment of the present invention, showing a state in which a part of the armature is pulled out from the housing. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an armature with a housing according to one aspect of the present disclosure will be described with reference to the drawings. Referring to Figures 1 to 3 , the armature with a housing 1 according to the first embodiment will be described. The armature with a housing 1 is a structural element of a linear motor and cooperates with a magnet plate serving as an excitation magnetic pole of the linear motor to generate a driving force for linear motion. The armature with a housing 1 according to the present embodiment includes an armature 2 and a housing 3.

[0019] The armature 2 has a conventionally well-known structure. Typically, the armature 2 has a core 4, a coil 5, and a resin portion (not shown). The core 4 is a member that forms the main body of the armature 2. The core 4 is substantially block-shaped and is formed of a magnetic material. The coil 5 is a metal wire that generates a magnetic field. The coil 5 is provided on the core 4. Specifically, the coil 5 is wound around a groove (not shown) formed in the core 4. Alternating current power is supplied to the coil 5 from a power supply device (not shown). The resin portion is provided so as to cover part or all of the core 4 and the coil 5. That is, the core 4 provided with the coil 5 is molded by the resin portion. In addition, the molding by the resin portion will be described later.

[0020] In the illustrated example, the armature 2 has a refrigerant pipe 6 through which refrigerant for cooling the coil 5 passes. The refrigerant pipe 6 is formed of a winding pipe. An inlet 7 for introducing refrigerant into the refrigerant pipe 6 is provided at one end of the refrigerant pipe 6. An outlet 8 for discharging refrigerant from the refrigerant pipe 6 is provided at the other end of the refrigerant pipe 6. When the armature 2 has the refrigerant pipe 6, the refrigerant pipe 6 is covered by the resin portion while leaving one end and the other end.

[0021] The housing 3 is hollow and can accommodate the armature 2 inside. The housing 3 has a housing main body 9, a first lid portion 10, a first elastic body 11, a second lid portion 12, and a second elastic body 13.

[0022] The housing main body 9 is a member that covers the outside of the armature 2. The housing main body 9 is in a cylindrical shape with both axial ends open. In the present embodiment, the housing main body 9 is in a square cylindrical shape. Typically, the housing main body 9 is a square cylindrical shape having a first wall portion 14, a second wall portion 15, a third wall portion 16, and a fourth wall portion 17.

[0023] The first wall portion 14 is a portion that faces a magnet plate that serves as an excitation magnetic pole of a linear motor. The second wall portion 15 is located at a position opposite to the first wall portion 14 (the opposite side position). The second wall portion 15 has a plurality of through holes 18 through which screws used when mounting the armature 1 with the housing to a driven object (machine, unit, member, etc.) to be driven pass. When mounting the armature 1 with the housing to the driven object, the screws pass through the through holes 18 and are screwed into threaded holes formed in the armature 2. In the present embodiment, the first wall portion 14 and the second wall portion 15 face each other in the thickness direction of the housing 3. One end of the first wall portion 14 and one end of the second wall portion 15 are connected to each other by the third wall portion 16. The other end of the first wall portion 14 and the other end of the second wall portion 15 are connected to each other by the fourth wall portion 17. In the present embodiment, the third wall portion 16 and the fourth wall portion 17 face each other in the width direction of the housing 3.

[0024] The corners of the housing body 9 are in an R shape. Specifically, the corners between the first wall portion 14 and the third wall portion 16, between the first wall portion 14 and the fourth wall portion 17, between the second wall portion 15 and the third wall portion 16, and between the second wall portion 15 and the fourth wall portion 17 are in an R shape. In the present application, the so-called "R shape" means a shape with roundness formed by making the corners into an arc shape.

[0025] The first cover portion 10 is in a plate shape and is a member that seals the opening on the axial one end side ( Figure 2 the upper right side in) of the housing body 9. In the present embodiment, the first cover portion 10 has a first cover main body portion 19 and a first insertion portion 20. The first cover main body portion 19 is the part that seals the opening on the axial one end side of the housing body 9. The first cover main body portion 19 is in a substantially quadrilateral plate shape and is arranged with the plate surface facing the axial direction of the housing body 9. The first insertion portion 20 is the part that is inserted into the opening on the axial one end side of the housing body 9. The first insertion portion 20 is in a substantially quadrilateral plate shape and is provided at the central portion of the plate surface of the first cover main body portion 19. The first insertion portion 20 protrudes from the first cover main body portion 19 toward the axial other end side of the housing body 9. At this time, the first insertion portion 20 is arranged on the first cover main body portion 19 with the plate surface facing the axial direction of the housing body 9. The outer shape of the first insertion portion 20 is smaller than the outer shape of the first cover main body portion 19. Thus, the first cover portion 10 has a stepped portion that is recessed inward. The stepped portion of the first cover portion 10 is the outer peripheral surface of the first insertion portion 20.

[0026] The first cover portion 10 has an injection port 21 for injecting resin for forming a resin portion that covers the core 4, the coil 5, and the refrigerant pipe 6 into the housing 3. The injection port 21 penetrates the first cover portion 10 in the thickness direction. That is, the injection port 21 penetrates the first cover main body portion 19 in the thickness direction and also penetrates the first insertion portion 20 in the thickness direction. In the present embodiment, the first cover portion 10 has two injection ports 21, 21. One of the two injection ports 21, 21 is actually used for injecting resin. The other of the two injection ports 21, 21 is used for discharging the air in the housing 3 to the outside when injecting resin into the housing 3. In the present embodiment, the first cover portion 10 has the injection port 21, but instead of the first cover portion 10, the second cover portion 12 described later may have the injection port. In addition, the number of the injection ports 21 is not limited to two.

[0027] The first elastic body 11 is an elastically deformable annular member. Typically, the first elastic body 11 is an O-ring. The first elastic body 11 is arranged on the stepped portion of the first cover portion 10 by being sleeved on the first insertion portion 20 of the first cover portion 10.

[0028] The first cover part 10 provided with the first elastic body 11 is mounted on the housing main body 9 so as to block the opening at one axial end side of the housing main body 9. Specifically, the first insertion part 20 is inserted into the opening at one axial end side of the housing main body 9 until the first cover main body part 19 contacts the axial end part of the housing main body 9. In the state where the first insertion part 20 is inserted into the housing main body 9, the first elastic body 11 is located between the housing main body 9 and the first insertion part 20 in a deformed state such as being flattened. Therefore, the first cover part 10 is mounted on the housing main body 9 by the friction between the first elastic body 11 and the housing main body 9. In the state where the first cover part 10 is mounted on the housing main body 9, the first elastic body 11 seals the gap between the first insertion part 20 and the housing main body 9. Thus, the first elastic body 11 is a member that seals the gap between the housing main body 9 and the first cover part 10 and mounts the first cover part 10 on the housing main body 9.

[0029] The second cover part 12 is plate-shaped and is a member that blocks the opening at the other axial end side of the housing main body 9. In the present embodiment, the second cover part 12 has substantially the same structure as that of the first cover part 10. That is, the second cover part 12 has a second cover main body part 22 and a second insertion part (not shown). The second cover main body part 22 is the part that blocks the opening at the other axial end side of the housing main body 9. The second cover main body part 22 is plate-shaped in a substantially quadrilateral shape and is arranged with the plate surface facing the axis of the housing main body 9. The second insertion part is the part inserted into the opening at the other axial end side of the housing main body 9. The second insertion part is plate-shaped in a substantially quadrilateral shape and is provided at the center of the plate surface of the second cover main body part 22. The second insertion part projects from the second cover main body part 22 toward the axial one end side of the housing main body 9. At this time, the second insertion part is provided on the second cover main body part 22 with the plate surface facing the axis of the housing main body 9. The outer shape of the second insertion part is smaller than the outer shape of the second cover main body part 22. Thus, the second cover part 12 has a stepped part that is recessed inward. The stepped part of the second cover part 12 is the outer peripheral surface of the second insertion part. In the illustrated example, the second cover part 12 has a through hole 23 through which the refrigerant pipe 6 inlet 7 and the refrigerant pipe 6 outlet 8 penetrate.

[0030] The second elastic body 13 is an elastically deformable annular member. Typically, the second elastic body 13 is an O-ring. The second elastic body 13 is provided on the stepped part of the second cover part 12 by being sleeved on the second insertion part of the second cover part 12.

[0031] The second cover portion 12 provided with the second elastic body 13 is mounted on the housing body 9 so as to block the opening on the other axial end side of the housing body 9. The second cover portion 12 is mounted on the housing body 9 in the same manner as the first cover portion 10. Specifically, the second insertion portion is inserted into the opening on the other axial end side of the housing body 9 until the second cover main body portion 22 contacts the other axial end portion of the housing body 9. In a state where the second insertion portion is inserted into the housing body 9, the second elastic body 13 is located between the housing body 9 and the second insertion portion in a deformed state such as being flattened. Therefore, the second cover portion 12 is mounted on the housing body 9 by the friction between the second elastic body 13 and the housing body 9. In a state where the second cover portion 12 is mounted on the housing body 9, the second elastic body 13 seals the gap between the second insertion portion and the housing body 9. Thus, the second elastic body 13 is a member that seals the gap between the housing body 9 and the second cover portion 12 and mounts the second cover portion 12 on the housing body 9.

[0032] In the present embodiment, the first cover portion 10 has a first anti - detachment portion 24 for preventing the first elastic body 11 from falling off the first insertion portion 20. The first anti - detachment portion 24 is plate - shaped. The first anti - detachment portion 24 is provided on the first insertion portion 20 of the first cover portion 10. Specifically, in the first insertion portion 20, the first anti - detachment portions 24 are fixed to both end portions along the width direction of the housing body 9. The first anti - detachment portion 24 is fixed to the first insertion portion 20 by screws or the like. In a state where the first anti - detachment portion 24 is provided on the first insertion portion 20, the first anti - detachment portion 24 is arranged with the plate surface facing the axial direction of the housing body 9. In a state where the first anti - detachment portion 24 is provided on the first insertion portion 20, the first anti - detachment portion 24 extends outward with respect to the first insertion portion 20. Therefore, a part of the first elastic body 11 sleeved on the first insertion portion 20 is arranged between the first anti - detachment portion 24 and the first cover main body portion 19. Thereby, it is possible to prevent the first elastic body 11 from falling off the first insertion portion 20.

[0033] In the present embodiment, the second cover portion 12 has a second anti - detachment portion (not shown) for preventing the second elastic body 13 from falling off the second insertion portion. The second anti - detachment portion has a structure substantially the same as that of the first anti - detachment portion 24 and is provided on the second insertion portion in the same manner as the first anti - detachment portion 24. That is, in the second insertion portion, plate - shaped second anti - detachment portions are fixed to both end portions along the width direction of the housing body 9. Therefore, a part of the second elastic body 13 sleeved on the second insertion portion is arranged between the second anti - detachment portion and the second cover main body portion 22. Thereby, it is possible to prevent the second elastic body 13 from falling off the second insertion portion.

[0034] If single-phase alternating current or three-phase alternating current is applied as electric power to the coil 5 of the armature 1 with a housing of such a structure, attractive and repulsive forces act between the moving magnetic field generated in the coil 5 and the magnetic field of the magnet plate, and a thrust is imparted to the armature 1 with a housing. As a result, the armature 1 with a housing can linearly move along the arrangement direction of the plurality of permanent magnets arranged on the magnet plate. In this way, the linear motor including the armature 1 with a housing and the magnet plate operates.

[0035] Next, the assembly of the armature 1 with a housing of the present embodiment will be described. When assembling the armature 1 with a housing, with the armature 2 disposed in the housing main body 9, the first lid portion 10 and the second lid portion 12 may be attached to the housing main body 9. When attaching the second lid portion 12 to the housing main body 9, the inlet 7 and the outlet 8 of the refrigerant pipe 6 are exposed to the outside of the housing 3 through the through hole 23 of the second lid portion 12. Alternatively, after the armature 2 is housed in the housing main body 9 with one of the first lid portion 10 and the second lid portion 12 attached, the other of the first lid portion 10 and the second lid portion 12 may be attached to the housing main body 9.

[0036] After the armature 2 is thus housed in the housing 3, the molten resin is injected into the housing 3 from the injection port 21. After the molten resin is injected into the housing 3, the molten resin solidifies, and thus a resin portion covering the core 4, the coil 5, and the refrigerant pipe 6 can be formed. In this way, the armature 2 having the resin portion covering the core 4 and the coil 5 is housed in the housing 3.

[0037] In the case of the armature 1 with a housing of the first embodiment, the first lid portion 10 is attached to the housing main body 9 using the first elastic body 11, and the second lid portion 12 is attached to the housing main body 9 using the second elastic body 13. Therefore, in the armature 1 with a housing of the first embodiment, welding is not required when assembling the housing 3.

[0038] In the case of the armature 1 with a housing of the first embodiment, the first elastic body 11 and the second elastic body 13 are O-rings. Therefore, in the armature 1 with a housing of the first embodiment, the first lid portion 10 and the second lid portion 12 can be easily attached to the housing main body 9.

[0039] In the case of the armature 1 with a housing of the first embodiment, the housing 3 has an injection port 21 for the molten resin. Therefore, after the core 4 provided with the coil 5 is housed in the housing 3, a resin portion covering the core 4 and the coil 5 can be formed.

[0040] In the case of the armature 1 with a housing according to the first embodiment, molten resin is injected into the housing 3 from the injection port 21. After the molten resin is injected into the housing 3 and solidifies, the solidified resin can sandwich the first anti-disengagement portion 24 and the second anti-disengagement portion. Therefore, according to the armature 1 with a housing of the first embodiment, the first cover portion 10 and the second cover portion 12 can be fixed to the housing main body 9 by the resin. That is, the resin can function as a fixing member for fixing the first cover portion 10 and the second cover portion 12 to the housing main body 9. In addition, the fixing member is not limited to resin, and for example, an adhesive or the like can also be used. In this way, the housing main body 9 and the first cover portion 10 and the housing main body 9 and the second cover portion 12 can be fixed by the fixing member.

[0041] Next, use Figure 4 The armature 1a with a housing according to the second embodiment of the present invention will be described. In addition, the functions of the components having the same reference numerals as those marked in the first embodiment are assumed to be the same, and therefore, the description will sometimes be omitted below.

[0042] In the first embodiment, the resin portion covering the core 4 and the coil 5 is formed by injecting resin into the housing 3 from the injection port 21. However, in the second embodiment, the core 4 and the coil 5 are previously covered by the resin portion 25. In this case, in order to assemble the armature 1a with a housing, after the armature 2 in which the core 4 and the coil 5 are covered by the resin portion 25 is housed in the housing main body 9, the first cover portion 10 and the second cover portion 12 are installed on the housing main body 9. In addition, in the second embodiment, the first anti-disengagement portion 24 and the second anti-disengagement portion may be omitted.

[0043] In the case of the armature 1a with a housing according to the second embodiment, the core 4 and the coil 5 are covered by the resin portion 25 before being housed in the housing 3. Therefore, according to the armature 1a with a housing of the second embodiment, the armature 2 in which the core 4 and the coil 5 are covered by the resin portion 25 can be easily housed in the housing 3.

[0044] Next, use Figure 5 The armature 1b with a housing according to the third embodiment of the present invention will be described. In addition, the functions of the components having the same reference numerals as those marked in the first embodiment are assumed to be the same, and therefore, the description will sometimes be omitted below. The structure of the housing 3 of the armature 1b with a housing according to the third embodiment is different from that of the first embodiment.

[0045] Before the housing body 9 of the armature 1b with a housing in the third embodiment is formed into a cylindrical shape, the third wall portion 16 is divided along a line that is axially along the housing body 9 in such a manner that a circumferential part can be opened. The housing body 9 is formed into a cylindrical shape by welding in a state where the divided surfaces of the divided third wall portion 16 are butted against each other. That is, the third wall portion 16 has a welded portion 26 formed by welding the divided surfaces that are divided with the plane having the axis of the housing body 9 as a boundary to each other.

[0046] In the third embodiment, the third wall portion 16 is divided, but the fourth wall portion 17 may be divided instead of the third wall portion 16. In this case, the fourth wall portion 17 has a welded portion 26 formed by welding the divided surfaces that are divided with the plane having the axis of the housing body 9 as a boundary to each other.

[0047] In the case of the armature 1b with a housing in the third embodiment, the welded portion 26 is provided on the third wall portion 16 or the fourth wall portion 17. In the conventional case, the welded portion is provided at the corner between the first wall portion and the third wall portion, the corner between the first wall portion and the fourth wall portion, the corner between the second wall portion and the third wall portion, and the corner between the second wall portion and the fourth wall portion. Therefore, since the welded portion bulges, it may not be possible to ensure flatness in the second wall portion for mechanical installation and the first wall portion facing the magnet plate. In contrast, in the third embodiment, the welded portion is not located at the corner of the housing body 9, and thus the above problem does not occur.

[0048] In the case of the armature 1b with a housing in the third embodiment, after the housing body 9 is formed into a cylindrical shape, the armature 2 is housed in the housing 3. That is, in the third embodiment, the welding operation is performed in a state where the armature 2 is not housed in the housing 3, and thus no adverse effect caused by heat is given to the armature 2.

[0049] In the case of the armature 1b with a housing in the third embodiment, the housing body 9 has the welded portion 26. Therefore, according to the armature 1b with a housing in the third embodiment, the cylindrical housing body 9 can be formed more easily compared with the case where the housing body 9 is formed by extrusion molding.

[0050] Next, use Figure 6 The armature 1c with a housing according to the fourth embodiment of the present invention will be described. In addition, the functions of the components having the same reference numerals as those labeled in the first embodiment are assumed to be the same, and thus the description may be omitted hereinafter. The structure of the housing 3 of the armature 1c with a housing according to the fourth embodiment is different from that of the first embodiment.

[0051] Before the housing body 9 of the armature 1c with a housing in the fourth embodiment is formed into a cylindrical shape, the third wall portion 16 and the fourth wall portion 17 are divided along a line that extends along the axial direction of the housing body 9. As Figure 6 shown, the housing body 9 has a first member 27 that covers one side in the thickness direction of the armature 2 and a second member 28 that covers the other side in the thickness direction of the armature 2. The housing body 9 is welded in a state where the divided surfaces 29, 29 of the third wall portion 16 are abutted against each other, and is welded in a state where the divided surfaces 30, 30 of the fourth wall portion 17 are abutted against each other, thereby forming a cylindrical shape. That is, the third wall portion 16 and the fourth wall portion 17 have a welded portion 26 formed by welding the divided surfaces that are divided with the plane having the axis of the housing body 9 as a boundary to each other.

[0052] In the case of the armature 1c with a housing in the fourth embodiment, the welded portion 26 is provided in the third wall portion 16 and the fourth wall portion 17. Therefore, according to the armature 1c with a housing in the fourth embodiment, since the welded portion 26 is not located at the corner of the housing body 9, the flatness of the first wall portion 14 and the second wall portion 15 can be ensured.

[0053] In the case of the armature 1c with a housing in the fourth embodiment, after the housing body 9 is formed into a cylindrical shape, the armature 2 is housed in the housing 3. That is, in the fourth embodiment, since the welding operation is performed in a state where the armature 2 is not housed in the housing 3, adverse effects caused by heat are not given to the armature 2.

[0054] In the case of the armature 1c with a housing in the fourth embodiment, the housing body 9 has the welded portion 26. Therefore, according to the armature 1c with a housing in the fourth embodiment, compared with the case where the housing body 9 is formed by extrusion molding, the cylindrical housing body 9 can be formed more easily.

[0055] According to at least one of the embodiments described above, the armature 1 with a housing has the housing 3 having the aforementioned structure. Therefore, it is possible to provide an armature 1 with a housing that uses a housing 3 in which the welding portion can be reduced.

[0056] Although the present disclosure has been described in detail, the present disclosure is not limited to the above-described embodiments. These embodiments can be variously added, replaced, changed, partially deleted, etc. within the scope not departing from the gist of the present disclosure, or within the scope not departing from the gist of the present disclosure derived from the content described in the claims and its equivalents. In addition, these embodiments can also be implemented in combination. For example, in the above-described embodiments, the order of each operation and the order of each process are shown as an example and are not limited thereto. The same applies to the case where numerical values or arithmetic expressions are used to explain the above-described embodiments.

[0057] For example, in the third and fourth embodiments, the resin part covering the core 4 and the coil 5 is formed by injecting the molten resin into the housing 3 from the injection port 21. However, in the third and fourth embodiments, the core 4 and the coil 5 may also be covered with the resin part before being received into the housing 3.

[0058] Regarding the above embodiments, the following supplementary notes are further disclosed.

[0059] (Supplementary Note 1)

[0060] The armature (1) with a housing includes: an armature (2) having: a core (4) serving as the main body; a coil (5) provided on the core (4); and a resin part covering part or all of the core (4) and the coil (5); and a housing (3) capable of receiving the armature (2) therein. The housing (3) has: a cylindrical housing main body (9) covering the outside of the armature (2); a first lid part (10) closing an opening on one axial end side of the housing main body (9); a first elastic body (11) sealing a gap between the housing main body (9) and the first lid part (10) and attaching the first lid part (10) to the housing main body (9); a second lid part (12) closing an opening on the other axial end side of the housing main body (9); and a second elastic body (13) sealing a gap between the housing main body (9) and the second lid part (12) and attaching the second lid part (12) to the housing main body (9).

[0061] (Supplementary Note 2)

[0062] The armature (1) with a housing according to Supplementary Note 1, wherein preferably, the corners of the square cylindrical housing main body (9) are in an R shape. Preferably, the first lid part (10) has a first insertion part (20) inserted into the opening on one axial end side of the housing main body (9), and the second lid part (12) has a second insertion part inserted into the opening on the other axial end side of the housing main body (9). Preferably, the first elastic body (11) and the second elastic body (13) are elastically deformable annular members, the first elastic body (11) is sleeved on the first insertion part (20), and the second elastic body (13) is sleeved on the second insertion part.

[0063] (Supplementary Note 3)

[0064] The armature (1) with a housing according to Supplementary Note 1 or Supplementary Note 2, wherein preferably, one of the first lid part (10) and the second lid part (12) has an injection port (21) for injecting the resin for forming the resin part into the housing (3).

[0065] (Supplementary Note 4)

[0066] The armature (1) with a housing is according to any one of Supplementary Notes 1 to 3. Preferably, the housing main body (9) and the first cover portion (10), and the housing main body (9) and the second cover portion (12) are fixed by fixing members.

[0067] (Supplementary Note 5)

[0068] The armature (1) with a housing is according to any one of Supplementary Notes 1 to 4. Preferably, the square tube-shaped housing main body (9) has: a first wall portion (14) that faces a magnet plate serving as an exciting magnetic pole of a linear motor; a second wall portion (15) that faces the first wall portion (14); a third wall portion (16) that connects one end portion of the first wall portion (14) and one end portion of the second wall portion (15) to each other; and a fourth wall portion (17) that connects the other end portion of the first wall portion (14) and the other end portion of the second wall portion (15) to each other. Preferably, one or both of the third wall portion (16) and the fourth wall portion (17) have a welded portion (26) formed by welding split surfaces that are divided by a plane having the axis of the housing main body (9) as a boundary.

[0069] Explanation of Reference Numerals

[0070] 1. Armature with housing; 2. Armature; 3. Housing; 4. Core; 5. Coil; 9. Housing main body; 10. First cover portion; 11. First elastic body; 12. Second cover portion; 13. Second elastic body; 14. First wall portion; 15. Second wall portion; 16. Third wall portion; 17. Fourth wall portion; 20. First insertion portion; 21. Injection port; 25. Resin portion; 26. Welded portion.

Claims

1. An armature with a housing, comprising: An armature having: a core that forms the main body; a coil disposed on the core; and a resin portion that covers part or all of the core and the coil; and A housing that can accommodate the armature therein, The housing having: A cylindrical housing body that covers the outside of the armature; A first cover portion that closes an opening on one axial end side of the housing body; A first elastic body that seals a gap between the housing body and the first cover portion and mounts the first cover portion to the housing body; A second cover portion that closes an opening on the other axial end side of the housing body; And A second elastic body that seals a gap between the housing body and the second cover portion and mounts the second cover portion to the housing body.

2. The armature with a housing according to claim 1, Wherein, The corners of the square cylindrical housing body are in an R shape, The first cover portion has a first insertion portion that is inserted into the opening on one axial end side of the housing body, The second cover portion has a second insertion portion that is inserted into the opening on the other axial end side of the housing body, The first elastic body and the second elastic body are elastically deformable annular members, The first elastic body is sleeved on the first insertion portion, The second elastic body is sleeved on the second insertion portion.

3. The armature with a housing according to claim 1 or 2, Wherein, One of the first cover portion and the second cover portion has an injection port for injecting resin for forming the resin portion into the housing.

4. The armature with a housing according to any one of claims 1 to 3, Wherein, The housing body and the first cover portion and the housing body and the second cover portion are fixed by fixing members.

5. The armature with a housing according to any one of claims 1 to 4, Wherein, The square cylindrical housing body has: a first wall portion that faces a magnet plate serving as an excitation magnetic pole of a linear motor; a second wall portion that faces the first wall portion; a third wall portion that connects one end portion of the first wall portion and one end portion of the second wall portion to each other; and a fourth wall portion that connects the other end portion of the first wall portion and the other end portion of the second wall portion to each other, One or both of the third wall portion and the fourth wall portion have a welded portion formed by welding split surfaces divided by a plane having the axis of the housing body as a boundary.

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