JP3666218B2 - Linear motor with air-core coil - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear motor, a synchronous machine, an induction machine, or the like, which includes a moving field type or movable armature type air core coil.
[0002]
[Prior art]
FIG. 2 is an assembly process diagram of an armature including an air core coil of a conventional movable armature type synchronous machine, and FIG. 3 is a sectional view of the armature of FIG. Mainly in FIG. 2, a plurality of air-core coils 1 having lead wires 1a and a coil mounting plate 32 made of an insulating material and providing interphase insulation are prepared. The positions where the air-core coils 1 are attached to both surfaces of the coil mounting plate 32 are marked. Each of the air core coils 1 is fixed to the injured position by bonding with an adhesive or the like, and connected by a jumper 1b to form an armature coil 33 having a plurality of air core coils 1 and coil mounting plates 32. A surface insulating sheet 34 (see also FIG. 3) is applied to the surface of the armature coil 33. The armature coil 33 provided with the surface insulating sheet 34 is inserted into a nonmagnetic protective case 35 such as stainless steel prepared in advance. Thereafter, the protective case 35 is filled with an insulating synthetic resin 36 (see FIG. 3) and molded to complete the movable armature 30 (see FIG. 3). The coil mounting plate 32 is necessary for the original interphase insulation for handling until the air core coil 1 is attached to the coil mounting plate 32, the surface insulating sheet 34 is applied, or the armature coil 33 is inserted into the protective case 35. Thickness that requires mechanical strength more than a certain thickness. The protective case 35 also requires sufficient mechanical strength for subsequent handling of the completed movable armature 30.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional example, it is difficult to position and attach the air-core coil, and a surface insulating sheet is required for the air-core coil. The armature is large.
An object of the present invention is to provide a linear motor having an air-core coil that can simplify the positioning operation and fixing operation of the air-core coil, and can reduce the size of the armature by eliminating the surface insulating sheet and the coil mounting plate of the air-core coil. Is to provide.
[0004]
[Means for Solving the Problems]
The linear motor having the air-core coil according to the first aspect of the present invention stores a plurality of air-core coils side by side in a case made of an insulating synthetic resin, and arranges positioning interphase insulation between adjacent air-core coils of the case, Insulating synthetic resin is filled.
According to the linear motor including the air-core coil of the first aspect, the positioning work and the fixing work of a plurality of adjacent air-core coils are simplified by the case, the interphase insulation and the insulating synthetic resin to be filled. The case made of synthetic resin eliminates the need for the surface insulation sheet of the air-core coil and the coil mounting plate, thereby reducing the size of the armature.
[0005]
Invention 2 arrange | positions a positioning body in one coil end of the air-core coil in Invention 1.
According to the second aspect of the present invention, the positioning operation at the coil end simplifies the positioning operation of the air-core coil in the direction perpendicular to the adjacent direction.
The invention 3 is the invention 1 or 2, wherein the positioning phase insulation or the positioning body is integrally formed with the case.
[0006]
According to the invention 3, since the positioning phase insulation or the positioning body is integrally formed with the case, the number of parts is reduced, the structure is simplified, and the usage amount of the insulating synthetic resin filled with the case becomes strong and expensive. Decrease.
A fourth aspect of the present invention is the third aspect of the present invention, wherein the air core coil can be inserted at a position corresponding to the other coil end of the case and a groove communicating with each coil end, and a lead wire of each air core coil communicating with the groove is provided. Steps are provided for this purpose.
[0007]
According to the fourth aspect of the present invention, the lead wire and the jumper wire of the air-core coil can be firmly arranged not in the case but in the case by the groove, the step and the insulating synthetic resin to be filled.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings of the embodiments. In each drawing including the conventional example, portions denoted by the same reference numerals have approximately the same functions and may not be described.
In the armature of the embodiment of the movable armature type synchronous machine shown in FIG. 1, a plurality of rows of air-core coils 1 having lead wires 1a are housed side by side in a case 2 made of insulating synthetic resin. Positioning phase insulation 2a is arranged between adjacent air-core coils 1. The positioning body 2b is disposed at one coil end of the air-core coil 1. If the positioning interphase insulation 2 a and the positioning body 2 b are formed integrally with the case 2, the air core coil 1 can be easily stored like a pocket. Each of the air core coils 1 can be inserted into a position corresponding to the other coil end of the case 2 and the groove 2m communicates with each coil end, and the lead wire 1a of each air core coil 1 communicated with the groove 2m. Step 2d is provided. In this case, since it is a synchronous machine, the face-to-face insulation 3 is disposed between the facing air-core coils 1. The connecting wire 1b illustrated in a simplified manner is connected, and the armature 10 is completed by filling the case 2 with the insulating synthetic resin 4.
[0009]
In the case 2 on the other coil end side filled with the insulating synthetic resin 4, when necessary, a fixture (not shown) for a slide rail to be linearly moved is molded. The positioning phase insulation 2 a between the adjacent air core coils 1 of two rows of air core coils 1 can be protruded beyond the thickness of the air core coil 1. Then, the air core coils 1 in the other row are positioned and the air gaps are automatically maintained between the air core coils 1 facing each other, and the insulating synthetic resin 4 is filled. become. The positioning interphase insulation 2a and the positioning body 2b may be separate from the case 2, but the number of parts increases. The case 2 may be divided into two for each air-core coil 1 facing, and the air-core coil 1 may be housed in the case in the axial direction. When the DC coil has one row of air core coils, the air core coils can be housed in the case in the axial direction and the whole case covered with a cover in that direction and filled with the insulating synthetic resin 4. Insulation 3 is not required.
[0010]
According to the linear motor having the air-core coil of the above-described embodiment, the positioning work and the fixing work of the plurality of adjacent air-core coils 1 can be easily performed by the case 2, the positioning interphase insulation 2a, and the insulating synthetic resin 4 filled. The case 2 made of insulating synthetic resin eliminates the need for the surface insulating sheet and coil mounting plate of the air-core coil 1 and makes the armature smaller, and increases the thrust of the linear motor when the dimensions are the same. To do. Then, the positioning body 2b at the coil end simplifies the positioning operation of the air-core coil 1 in the direction perpendicular to the adjacent direction, and the positioning interphase insulation 2a and the positioning body 2b are integrally formed with the case 2, thereby reducing the number of parts. Thus, the structure is simplified, the case 2 is strengthened, and the amount of the insulating synthetic resin 4 to be filled that is expensive is reduced. In addition, the lead wire 1a and the crossover wire 1b of the air-core coil 1 can be firmly arranged in the case 2 instead of outside the case 2 by the groove 2m and the step 2d.
[0011]
【The invention's effect】
According to the linear motor having the air core coil of the first aspect, the positioning operation and the adhering operation of a plurality of adjacent air core coils can be simplified, and the armature can be provided without the surface insulating sheet and the coil mounting plate of the air core coil. There is an effect that it can be made small.
According to the second aspect of the present invention, the air-core coil has an effect that the positioning operation is simplified in the direction perpendicular to the adjacent direction.
[0012]
According to the invention 3, since the positioning phase insulation or the positioning body is integrally formed with the case, the number of parts is reduced, the structure is simplified, and the usage amount of the insulating synthetic resin filled with the case becomes strong and expensive. Has the effect of reducing
According to the invention 4, the lead wire and the jumper wire of the air-core coil can be firmly arranged in the case, not outside the case, by the groove, the step and the insulating synthetic resin filled.
[Brief description of the drawings]
FIG. 1 is a front view of an essential part including a rotational sectional view of an embodiment. FIG. 2 is an assembly process diagram of a conventional example. FIG. 3 is a sectional view of FIG.
DESCRIPTION OF SYMBOLS 1 Air core coil 1a Lead wire 1b Crossover 2 Case 2a Positioning phase insulation 2b Positioning body 2d Stepped 2m Groove 3 Face-to-face phase insulation 4 Insulating synthetic resin 10 Armature

Claims (4)

A plurality of air core coils are stored side by side in a case made of an insulating synthetic resin, positioning phase insulation is arranged between adjacent air core coils of this case, and the insulating synthetic resin is filled in the case. A linear motor with an air-core coil. A linear motor comprising the air-core coil according to claim 1,
A linear motor comprising an air-core coil, wherein a positioning body is disposed at one coil end of the air-core coil. A linear motor comprising the air-core coil according to claim 1 or 2,
A linear motor comprising an air-core coil, wherein a positioning phase insulation or a positioning body is integrally formed with a case. A linear motor comprising the air-core coil according to claim 3,
In the position corresponding to the other coil end of the case, each air core coil can be inserted and a groove communicating with each coil end and a step for the lead wire of each air core coil communicating with this groove are provided. A linear motor comprising an air-core coil characterized by that.

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