Enclosed armature of a linear motor

Abstract

An encased armature of the present disclosure comprises: an armature having a core forming a body, a coil disposed on the core, and a resin portion partially or completely covering the core and the coil; and a housing in which the armature can be housed.The housing has a cylindrical housing body that covers the outside of the fitting; a first lid portion that closes an opening at one end in the axial direction of the housing body; a first elastic body that seals a gap between the housing body and the first lid portion and that fixes the first lid portion to the housing body; a second lid portion that closes an opening at the other end in the axial direction of the housing body; and a second elastic body that seals a gap between the housing body and the second lid portion and that fixes the second lid portion to the housing body.

Description

Technical field

[0001] The present disclosure relates to a shrouded armature of a linear motor. State of the art

[0002] In recent years, it has been proposed to use a linear motor as a device for driving various industrial machines, such as the magnetic head drive mechanism of an office automation device, the spindle or table feed mechanism of a machine tool, and the like. This type of linear motor uses an armature in combination with a magnetic plate that acts as a field magnetic pole. Known armatures include those in which a resin is molded onto a core and a coil, and those in which a core, a coil, and a resin molded onto the core and coil are housed in a casing.

[0003] A linear motor is often installed in machines that operate with cutting fluid, such as in metalworking. For this reason, the linear motor is equipped with a fitting of the above-mentioned type, ensuring dust and water resistance. The housing of the latter type of fitting is assembled in a box-like manner using screws or welding. Citation listPatent document

[0004] Patent Document 1: Unexamined Japanese Patent Application, Publication No. 2019-115171 Disclosure of the invention Problems to be solved by the invention

[0005] When the enclosure is assembled by welding, the components that make up the enclosure are welded together. If the enclosure has a top wall, a bottom wall, a left wall, a right wall, a front wall, and a rear wall, the walls must be welded individually. Therefore, when assembling the enclosure by welding, many parts must be welded. Such assembly, which involves welding many parts, not only requires a lot of time and labor for the welding process, but can also increase the likelihood of a welding defect.

[0006] To overcome the disadvantages described above, a jacketed valve is required whose body has a smaller number of welds. Means to solve the problems

[0007] An encased armature according to the present disclosure comprises: an armature including a core as a main body, a coil disposed on the core, a resin portion partially or completely covering the core and the coil, and a housing capable of accommodating the armature therein.The housing includes a housing main body having a tubular shape and covering an outer side of the fitting, a first cover closing an opening at one axial end of the housing main body, a first elastic body sealing a gap between the housing main body and the first cover and enabling the first cover to be fixed to the housing main body, a second cover closing an opening at another axial end of the housing main body, and a second elastic body sealing a gap between the housing main body and the second cover and enabling the second cover to be fixed to the housing main body. Short description of the characters Fig. 1 is a perspective view showing a jacketed fitting according to a first embodiment of the present invention; Fig. 2 is an exploded perspective view of the jacketed fitting according to the first embodiment of the present invention, showing a state in which some parts of the fitting are pulled out from the housing for better understanding; Fig. 3 is a perspective view showing a first cover of the jacketed fitting according to the first embodiment of the present invention as viewed from the inside of the housing; Fig. 4 is an exploded perspective view of a jacketed fitting according to a second embodiment of the present invention, showing a state in which some parts of the fitting are pulled out from the housing; Fig. 5 is an exploded perspective view of a jacketed fitting according to a third embodiment of the present invention, showing a state in which some parts of the fitting are pulled out from the housing; and Fig. 6 is an exploded perspective view of a jacketed fitting according to a fourth embodiment of the present invention, showing a state in which some parts of the fitting are pulled out from the housing. Preferred embodiment of the invention

[0008] A jacketed fitting according to one aspect of the present disclosure will be described with reference to the figures. A jacketed fitting 1 according to a first embodiment will be described with reference to the Fig. 1 to 3. The sheathed armature 1 is a component of a linear motor and generates a driving force for linear movement in cooperation with a magnetic plate used as the field magnetic pole of the linear motor. The sheathed armature 1 of the present embodiment includes an armature 2 and a housing 3.

[0009] The armature 2 has a known configuration. Typically, the armature 2 includes a core 4, a coil 5, and a resin portion (not shown). The core 4 is a member serving as the main body of the armature 2. The core 4 has a substantially block shape and is made of a magnetic material. The coil 5 is a winding that generates a magnetic field. The coil 5 is connected to the core 4. Specifically, the coil 5 is wound around a slot (not shown) formed in the core 4. The coil 5 is supplied with alternating current from a power source (not shown). The resin portion is arranged to partially or completely cover the core 4 and the coil 5. In other words, the resin portion is molded onto the core 4 provided with the coil 5. The molding of the resin portion will be described later.

[0010] In the example shown, the fitting 2 includes a refrigerant line 6 through which a refrigerant flows to cool the coil 5. The refrigerant line 6 is a meander-shaped tube. The refrigerant line 6 has an inlet 7 at one end through which the refrigerant is introduced into the refrigerant line 6. The other end of the refrigerant line 6 is provided with an outlet 8 through which the refrigerant is discharged from the refrigerant line 6. In the configuration in which the fitting 2 includes the refrigerant line 6, the refrigerant line 6 is covered with the resin portion except at one and the other ends.

[0011] The housing 3 is hollow and can accommodate the fitting 2. The housing 3 comprises a housing main body 9, a first cover 10, a first elastic body 11, a second cover 12, and a second elastic body 13.

[0012] The housing main body 9 is a member that covers the exterior of the fitting 2. The housing main body 9 has a tubular shape with opposite axial ends open. In the present embodiment, the housing main body 9 has a prismatic tubular shape. Typically, the housing main body 9 has a quadrangular tubular shape with a first wall 14, a second wall 15, a third wall 16, and a fourth wall 17.

[0013] The first wall 14 faces the magnetic plate, which serves as the field magnetic pole of the linear motor. The second wall 15 is located at a position facing (opposite) the first wall 14. The second wall 15 has a plurality of through holes 18 through which screws are passed when the sheathed armature 1 is attached to an object to be driven (a machine, a unit, a component, etc.). When attaching the sheathed armature 1 to the object to be driven, the screws are screwed into the screw holes formed in the armature 2 via the through holes 18. In the present embodiment, the first wall 14 and the second wall 15 face each other in a thickness direction of the housing 3. One end of the first wall 14 and one end of the second wall 15 are connected to each other by the third wall 16.The other end of the first wall 14 and the other end of the second wall 15 are connected to each other by the fourth wall 17. In the present embodiment, the third wall 16 and the fourth wall 17 face each other in a width direction of the housing 3.

[0014] The corner portions of the housing main body 9 are R-shaped. Specifically, the corner portion between the first wall 14 and the third wall 16, the corner portion between the first wall 14 and the fourth wall 17, the corner portion between the second wall 15 and the third wall 16, and the corner portion between the second wall 15 and the fourth wall 17 are R-shaped. The term "R-shaped" as used herein means that a corner portion has a rounded shape by being formed into an arc.

[0015] The first cover 10 is a plate-shaped member having an opening at one axial end (at an upper right side in Fig. 2) of the housing main body 9. In the present embodiment, the first lid 10 includes a first lid main body 19 and a first insertion portion 20. The first lid main body 19 closes the opening at one axial end of the housing main body 9. The first lid main body 19 has a substantially quadrangular plate shape and is arranged with its plate surface in the axial direction of the housing main body 9. The first insertion portion 20 can be inserted into the opening at one axial end of the housing main body 9. The first insertion portion 20 has a substantially quadrangular plate shape and is arranged at a central portion of the plate surface of the first lid main body 19. The first insertion portion 20 protrudes from the first lid main body 19 toward the other axial end of the housing main body 9.The first insertion portion 20, which is arranged on the first cover main body 19, has its plate surface facing in the axial direction of the housing main body 9. .

[0016] The outer shape of the first insertion portion 20 is smaller than the outer shape of the first lid main body 19, whereby the first lid 10 has an inwardly recessed stepped portion. The stepped portion of the first lid 10 forms the outer peripheral surface of the first insertion portion 20.

[0017] The first lid 10 has an injection port 21 through which a resin is injected into the casing 3 to form the resin portion covering the core 4, the coil 5, and the refrigerant pipe 6. The injection port 21 penetrates the first lid 10 in the thickness direction. That is, the injection port 21 penetrates the first lid main body 19 in the thickness direction and penetrates the first insertion portion 20 in the thickness direction. In the present embodiment, the first lid 10 has two injection ports 21, 21. One of the two injection ports 21, 21 is arranged for the actual injection of the resin. The other of the two injection ports 21, 21 serves to discharge air from the casing 3 to the outside during the injection of the resin into the casing 3.In the present embodiment, the first lid 10 has the injection holes 21, but the second lid 12, which will be described later, may have injection holes instead of the first lid 10. The number of injection holes 21 is not limited to two.

[0018] The first elastic body 11 is an elastically deformable annular element. Typically, the first elastic body 11 is an O-ring. The first elastic body 11 is placed externally onto the first insertion portion 20 of the first cover 10, so that the first elastic body 11 is arranged on the above-described stepped portion of the first cover 10.

[0019] The first lid 10 with the first elastic body 11 attached thereto is fixed to the case main body 9 to close the opening at the one axial end of the case main body 9. Specifically, the first insertion portion 20 is inserted into the opening at the one axial end of the case main body 9 until the first lid main body 19 comes into contact with the one axial end of the case main body 9. In a state where the first insertion portion 20 is inserted into the case main body 9, the first elastic body 11 is positioned between the case main body 9 and the first insertion portion 20 while being deformed and squeezed. Accordingly, the first lid 10 is fixed to the case main body 9 by friction between the first elastic body 11 and the case main body 9.In a state where the first lid 10 is attached to the case main body 9, the first elastic body 11 seals a gap between the first insertion portion 20 and the case main body 9. Thus, the first elastic body 11 is a member that seals the gap between the case main body 9 and the first lid 10 and enables the first lid 10 to be attached to the case main body 9.

[0020] The second lid 12 is a plate-shaped member that closes the opening at the other axial end of the housing main body 9. In the present embodiment, the second lid 12 has substantially the same configuration as the first lid 10. Specifically, the second lid 12 includes a second lid main body 22 and a second insertion portion (not shown). The second lid main body 22 closes the opening at the other axial end of the housing main body 9. The second lid main body 22 has a substantially quadrangular plate shape and is arranged so that its plate surface faces the axial direction of the housing main body 9. The second insertion portion is insertable into the opening at the other axial end of the housing main body 9. The second insertion portion has a substantially quadrangular plate shape and is arranged at a central portion of the plate surface of the second lid main body 22.The second insertion portion protrudes from the second cover main body 22 toward one axial end of the housing main body 9. The second insertion portion, which is arranged on the second cover main body 22, faces with its plate surface in the axial direction of the housing main body 9. The outer shape of the second insertion portion is smaller than the outer shape of the second cover main body 22, whereby the second cover 12 has an inwardly recessed stepped portion. The stepped portion of the second cover 12 forms the outer peripheral surface of the second insertion portion. In the illustrated example, the second cover 12 has through holes 23 through which the inlet 7 and the outlet 8 of the refrigerant line 6, etc., pass.

[0021] The second elastic body 13 is an elastically deformable annular element. Typically, the second elastic body 13 is an O-ring. The second elastic body 13 is placed externally onto the second insertion portion of the second cover 12, so that the second elastic body 13 is arranged on the above-described stepped portion of the second cover 12.

[0022] The second lid 12 with the second elastic body 13 attached thereto is fixed to the housing main body 9 so as to close the opening at the other axial end of the housing main body 9. The second lid 12 is fixed to the housing main body 9 in the same manner as the first lid 10. Specifically, the second insertion portion is inserted into the opening at the other axial end of the housing main body 9 until the second lid main body 22 comes into contact with the other axial end of the housing main body 9. In a state where the second insertion portion is inserted into the housing main body 9, the second elastic body 13 is positioned between the housing main body 9 and the second insertion portion while being deformed and compressed. Accordingly, the second lid 12 is fixed to the housing main body 9 by friction between the second elastic body 13 and the housing main body 9.In a state where the second lid 12 is attached to the housing main body 9, the second elastic body 13 seals a gap between the second insertion portion and the housing main body 9. Thus, the second elastic body 13 is a member that seals the gap between the housing main body 9 and the second lid 12 and enables the second lid 12 to be attached to the housing main body 9.

[0023] In the present embodiment, the first cover 10 includes first detachment preventing portions 24 that prevent the first elastic body 11 from being detached from the first insertion portion 20. The first detachment preventing portions 24 each have a plate shape. The first detachment preventing portions 24 are arranged on the first insertion portion 20 of the first cover 10. Specifically, the first detachment preventing portions 24 are fixed to opposite end portions of the first insertion portion 20 in the width direction of the case main body 9. The first detachment preventing portions 24 are fixed to the first insertion portion 20 with screws or the like. The first detachment preventing portions 24 arranged on the first insertion portion 20 each have their plate surfaces facing the axial direction of the case main body 9.The first detachment preventing portions 24 arranged on the first insertion portion 20 extend outwardly from the first insertion portion 20. Therefore, the first elastic body 11, which is externally mounted on the first insertion portion 20, is partially positioned between the first lid main body 19 and the first detachment preventing portions 24. This arrangement can prevent the first elastic body 11 from detaching from the first insertion portion 20.

[0024] In the present embodiment, the second lid 12 includes second detachment preventing portions (not shown) for preventing the second elastic body 13 from being detached from the second insertion portion. The second detachment preventing portions have substantially the same configuration as the first detachment preventing portions 24 and are arranged on the second insertion portion in the same manner as the first detachment preventing portions 24. Specifically, the plate-shaped second detachment preventing portions are fixed to opposite end portions of the second insertion portion in the width direction of the case main body 9. Therefore, the second elastic body 13, which is externally mounted on the second insertion portion, is partially located between the second lid main body 22 and the second detachment preventing portions. With this arrangement, the second elastic body 13 can be prevented from being detached from the second insertion portion.

[0025] When a single-phase alternating current or a three-phase alternating current is applied as electric power to the coil 5 of the sheathed armature 1 having the above-described configuration, an attractive force and a repulsive force act between a shifting magnetic field generated in the coil 5 and the magnetic field of the magnetic plate, thereby exerting a thrust force on the sheathed armature 1. As a result, the sheathed armature 1 can move linearly in a direction in which a plurality of permanent magnets are arranged on the magnetic plate. In this way, the linear motor operates with the sheathed armature 1 and the magnetic plate.

[0026] Next, the assembly of the jacketed fitting 1 of the present embodiment will be described. The jacketed fitting 1 can be conveniently assembled by attaching the first cover 10 and the second cover 12 to the casing main body 9 in which the fitting 2 is housed. When the second cover 12 is attached to the casing main body 9, the inlet 7 and the outlet 8 of the refrigerant pipe 6 are open to the outside of the casing 3 through the through holes 23 of the second cover 12. Alternatively, after the fitting 2 is housed in the casing main body 9 to which either the first cover 10 or the second cover 12 is attached, the other cover 10 or the second cover 12 may be attached to the casing main body 9.

[0027] After the fitting 2 is housed in the housing 3 as described above, a molten resin is injected into the housing 3 through the injection port 21. After being injected into the housing 3, the molten resin hardens to form the resin portion covering the core 4, the coil 5, and the refrigerant tube 6. In this way, the fitting 2 housed in the housing 3 with the resin portion covering the core 4 and the coil 5 is obtained.

[0028] In the sheathed fitting 1 of the first embodiment, the first cover 10 is fixed to the housing main body 9 by the first elastic body 11, and the second cover 12 is fixed to the housing main body 9 by the second elastic body 13. Therefore, in the sheathed fitting 1 of the first embodiment, the housing 3 is assembled without welding.

[0029] In the jacketed fitting 1 according to the first embodiment, the first elastic body 11 and the second elastic body 13 are O-rings. Therefore, in the jacketed fitting 1 of the first embodiment, the first cover 10 and the second cover 12 can be easily attached to the housing main body 9.

[0030] In the sheathed fitting 1 according to the first embodiment, the housing 3 has the injection port 21 for the molten resin. Therefore, the resin portion covering the core 4 and the coil 5 can be molded after the core 4 provided with the coil 5 is housed in the housing 3.

[0031] In the case of the sheathed fitting 1 according to the first embodiment, the molten resin is injected into the housing 3 through the injection port 21. After being injected into the housing 3, the molten resin is cured, and the cured resin can sandwich the first peel-preventing portions 24 and the second peel-preventing portions. Therefore, according to the sheathed fitting 1 of the first embodiment, the first lid 10 and the second lid 12 can be fixed to the housing main body 9 with the resin. In other words, the resin functions as a fastening member that fixes the first lid 10 and the second lid 12 to the housing main body 9. The fastening member is not limited to the resin but may also be, for example, an adhesive. In this way, the housing main body 9 and the first lid 10, as well as the housing main body 9 and the second lid 12, can be fixed by the fastening member.

[0032] Next, a jacketed fitting 1a according to a second embodiment of the present invention will be described with reference to Fig. 4. Components designated by the same reference numerals as those used in the first embodiment have the same functions as in the first embodiment, and a description of these components can be omitted below.

[0033] In the first embodiment, the resin portion covering the core 4 and the coil 5 is formed by injecting the resin into the housing 3 through the injection port 21, but in the second embodiment, a core 4 and a coil 5 are covered in advance with a resin portion 25. In this case, the covered fitting 1a can be appropriately assembled by attaching a first lid 10 and a second lid 12 to a housing main body 9 after a fitting 2 including the core 4 and the coil 5 covered with the resin portion 25 is housed in the housing main body 9. In the second embodiment, the first detachment preventing portion 24 and the second detachment preventing portion can be omitted.

[0034] In the covered armature 1a according to the second embodiment, the core 4 and the coil 5 are covered with the resin portion 25 before being housed in the casing 3. Therefore, according to the covered armature 1a of the second embodiment, the armature 2 including the core 4 and the coil 5 covered with the resin portion 25 can be easily housed in the casing 3.

[0035] Next, a jacketed fitting 1b according to a third embodiment of the present invention will be described with reference to Fig. 5. Components denoted by the same reference numerals as those used in the first embodiment have the same functions as in the first embodiment, and descriptions of such components will be omitted below. The jacketed fitting 1b of the third embodiment differs from that of the first embodiment in the configuration of the housing 3.

[0036] The jacketed fitting 1b according to the third embodiment includes a housing main body 9 which, before being formed into a tubular shape, has a third wall 16 divided along a line in the axial direction of the housing main body 9 so that a part of the housing main body 9 can be opened in the circumferential direction. The housing main body 9 is formed into a tubular shape by welding the end surfaces of the partitions of the third wall 16 in a state where they abut against each other. That is, the third wall 16 has a welded portion 26 formed by welding the end surfaces of the partitions obtained by dividing the third wall 16 along a plane including the axis of the housing main body 9 as a boundary.

[0037] In the third embodiment, the third wall 16 is divided, but the fourth wall 17 may be divided instead of the third wall 16. In this case, the fourth wall 17 has a welded portion 26 formed by welding the end surfaces of the partitions obtained by dividing the fourth wall 17 along a plane including the axis of the housing main body 9 as a boundary.

[0038] In the jacketed fitting 1b according to the third embodiment, the welded portion 26 is arranged on the third wall 16 or the fourth wall 17. In the prior art, the welds are arranged at the corner portion between the first wall and the third wall, the corner portion between the first wall and the fourth wall, the corner portion between the second wall and the third wall, and the corner portion between the second wall and the fourth wall. Therefore, there is a concern that the flatness of the second wall attached to a machine and the flatness of the first wall facing the magnetic disk cannot be ensured due to the bulges of the welded portions. In contrast, the third embodiment, in which the welded portion is not arranged at the corner portions of the housing main body 9, is free from the above-described problem.

[0039] In the jacketed fitting 1b according to the third embodiment, the fitting 2 is housed in the housing 3 after the housing main body 9 is formed into a tubular shape.

[0040] That is, in the third embodiment, the fitting 2 is not affected by heat because the welding process is performed in a state where the fitting 2 is not yet housed in the housing 3.

[0041] In the covered fitting 1b according to the third embodiment, the housing main body 9 has the welded portion 26. Therefore, in the covered fitting 1b of the third embodiment, the tubular housing main body 9 can be formed more easily than in a case where the housing main body 9 is formed by extrusion molding.

[0042] Next, a jacketed fitting 1c according to a fourth embodiment of the present invention will be described with reference to Fig. 6. Components denoted by the same reference numerals as those used in the first embodiment have the same functions as in the first embodiment, and descriptions of such components will be omitted below. The jacketed fitting 1c of the fourth embodiment differs from that of the first embodiment in the configuration of the housing 3.

[0043] The jacketed fitting 1c according to the fourth embodiment comprises a housing main body 9 which, before being formed into a tubular shape, has a third wall 16 and a fourth wall 17, each divided along a line in the axial direction of the housing main body 9. As shown in Fig.As shown in Fig. 6, the housing main body 9 includes a first member 27 covering one side of a fitting 2 in the thickness direction, and a second member 28 covering the other side of the fitting 2 in the thickness direction. The housing main body 9 is formed into a tubular shape by welding the end surfaces 29, 29 of the portions of the third wall 16 to abut each other and the end surfaces 30, 30 of the portions of the fourth wall 17 to abut each other. That is, the third wall 16 and the fourth wall 17 each have a welded portion 26 formed by welding the end surfaces of partitions obtained by dividing the respective wall along a plane including the axis of the housing main body 9 as a boundary.

[0044] In the sheathed fitting 1c according to the fourth embodiment, the welded portion 26 is arranged on each of the third wall 16 and the fourth wall 17. Therefore, in the sheathed fitting 1c of the fourth embodiment, in which the welded portion 26 is not located at the corner portions of the housing main body 9, the flatness of the first wall 14 and the second wall 15 can be ensured.

[0045] In the jacketed fitting 1c according to the fourth embodiment, the fitting 2 is housed in the housing 3 after the housing main body 9 is formed into a tubular shape. That is, in the fourth embodiment, the fitting 2 is not affected by heat because the welding process is performed in a state where the fitting 2 is not yet housed in the housing 3.

[0046] In the case of the sheathed fitting 1c according to the fourth embodiment, the housing main body 9 has the welded portions 26. Therefore, in the sheathed fitting 1c of the fourth embodiment, the tubular housing main body 9 can be formed more easily than in a case where the housing main body 9 is formed by extrusion molding.

[0047] According to at least one of the embodiments described above, the jacketed fitting 1 comprises the housing 3 with the configuration described above. This makes it possible to provide the jacketed fitting 1 with a housing 3 having a reduced number of welds.

[0048] Although the present disclosure has been described in detail above, it should be noted that the present disclosure is not limited to the individual embodiments described above. Various additions, substitutions, modifications, partial deletions, and the like can be made to the above-described embodiments without departing from the spirit of the present disclosure or the spirit of the present disclosure as expressed in the claims and their equivalents. The above-described embodiments can also be implemented in combination. For example, in the above-described embodiments, the order of operations and the order of processes are described as an example and are not intended to limit the present disclosure. The same applies to the case where the above-described embodiments are described with numerical values or numerical expressions.

[0049] For example, in the third and fourth embodiments, the resin portion covering the core 4 and the coil 5 is formed by injecting the molten resin into the casing 3 through the injection port 21, but in the third and fourth embodiments, the core 4 and the coil 5 may be covered with the resin portion before the core 4 and the coil 5 are housed in the casing 3.

[0050] In the following, additional comments are made on the above statements. (Additional Note 1)

[0051] An encased armature (1) comprises: an armature (2) having a core (4) as a main body, a coil (5) arranged on the core (4), a resin portion partially or completely covering the core (4) and the coil (5); and a housing (3) capable of accommodating the armature (2) therein.The housing (3) comprises a housing main body (9) which has a tubular shape and covers an outer side of the fitting (2), a first cover (10) which closes an opening at one axial end of the housing main body (9), a first elastic body (11) which seals a gap between the housing main body (9) and the first cover (10) and enables the first cover (10) to be fastened to the housing main body (9), a second cover (12) which closes an opening at the other axial end of the housing main body (9), and a second elastic body (13) which seals a gap between the housing main body (9) and the second cover (12) and enables the second cover (12) to be fastened to the housing main body (9). (Additional Note 2)

[0052] In the jacketed fitting (1) according to Additional Remark 1, it is advantageous that the housing main body (9) has a prismatic tubular shape with an R-shaped corner portion. Preferably, the first cover (10) has a first insertion portion (20) insertable into the opening at one axial end of the housing main body (9), and the second cover (12) has a second insertion portion insertable into the opening at the other axial end of the housing main body (9). Preferably, the first elastic body (11) and the second elastic body (13) are each an elastically deformable ring element, the first elastic body (11) being fitted externally onto the first insertion portion (20) and the second elastic body (13) being fitted externally onto the second insertion portion. (Additional Note 3)

[0053] In the jacketed fitting (1) according to additional remark 1 or 2, it is advantageous that the first cover (10) or the second cover (12) has an injection opening (21) through which a resin is injected into the housing (3) to form the resin portion. (Additional Note 4)

[0054] In the jacketed fitting (1) according to any one of additional remarks 1 to 3, it is advantageous that the housing main body (9) and the first cover (10) are fastened to each other by a fastening element, and that the housing main body (9) and the second cover (12) are fastened to each other by a fastening element. (Additional Note 5)

[0055] In the sheathed fitting (1) according to any one of Additional Remarks 1 to 4, it is preferable that the housing main body (9) has a prismatic tubular shape and includes a first wall (14) facing a magnetic plate used as a field magnetic pole of a linear motor, a second wall (15) opposite to the first wall (14), a third wall (16) connecting one end of the first wall (14) to one end of the second wall (15), and a fourth wall (17) connecting the other end of the first wall (14) to the other end of the second wall (15). Preferably, one or both of the third wall (16) and the fourth wall (17) have a welded portion (26) formed by welding the end surfaces of partitions obtained by dividing one or both of the third wall (16) and the fourth wall (17) along a plane including the axis of the housing main body (9) as a boundary. Explanation of the reference symbols 1 Encased fitting 2 fittings 3 housings 4 core 5 coil 9 Main housing part 10 First lid 11 First elastic body 12 Second lid 13 Second elastic body 14 First Wall 15 Second Wall 16 Third Wall 17 Fourth Wall 20 First insertion section 21 Injection opening 25 Harz section 26 Welded section QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2019-115171

[0004]

Claims

[1] A jacketed fitting with: an armature comprising a core as the main body, a coil attached to the core, a resin portion partially or completely covering the core and the coil; and a housing in which the fitting can be accommodated, the housing includes a housing main body having a tubular shape and covering an outer side of the fitting, a first cover closing an opening at one axial end of the housing main body, a first elastic body that seals a gap between the housing main body and the first cover and enables the first cover to be fixed to the housing main body, a second cover closing an opening at another axial end of the housing main body, and a second elastic body that seals a gap between the housing main body and the second cover and enables the second cover to be fixed to the housing main body. [2] The jacketed fitting according to claim 1, wherein the housing main body has a prismatic, tubular shape with an R-shaped corner section, the first cover has a first insertion portion which can be inserted into the opening at one axial end of the housing main body, the second cover has a second insertion portion which can be inserted into the opening at the other axial end of the housing main body, the first elastic body and the second elastic body are each an elastically deformable annular element the first elastic body is placed from the outside onto the first insertion section and the second elastic body is placed on the second insertion section from the outside. [3] The jacketed fitting according to claim 1 or 2, wherein either the first cover or the second cover has an injection port through which a resin is injected into the housing to form the resin portion. [4] The sheathed fitting according to any one of claims 1 to 3, wherein the housing main body and the first cover are fixed to each other by a fixing member, and the housing main body and the second cover are fixed to each other by a fixing member. [5] The jacketed fitting according to any one of claims 1 to 4, wherein the housing main body has a prismatic tubular shape, a first wall facing a magnetic plate used as a magnetic field pole of a linear motor, a second wall facing the first wall, a third wall connecting one end of the first wall to one end of the second wall, and a fourth wall connecting another end of the first wall to another end of the second wall, and one or both of the third wall and the fourth wall have a welded portion formed by welding end faces of partitions obtained by dividing one or both of the third wall and the fourth wall along a plane including an axis of the housing main body as a boundary.

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