JPH04101279U - linear motor - Google Patents

Abstract

(57) [Summary] [Purpose] To fit a coil into each slit 8 of a primary core 1 constituting a linear motor without causing misalignment. [Structure] The tips of the teeth 13 of the four core groups 5 constituting the primary core 1 that protrude inward from the inner circumferential surface of the coil 9 (adjacent teeth) and the inside of the coil 9 Insert the wedge 16 between the peripheral surface and the primary core 1.
The coil 9 is positioned against.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a linear motor in which the primary core is longer than its outer diameter. Ru.

0002

[Conventional technology]

A linear motor consists of a squirrel cage electric motor developed on a flat surface. Shown in Figure 2. A linear motor is broadly divided into a primary core 1 and a secondary conductor 2. It has a long quadratic structure where the secondary side is longer than the next side. Then, the secondary side is fixed The child and the primary side become the traveling elements, and an air gap 3 is formed between them.

0003 The primary core 1 includes a thin core plate 4 made of a magnetic material, as shown in FIG. 2(b). For example, four laminated core groups 5 are arranged radially, and a pair of ring-shaped flanges are arranged. It is sandwiched between screws 6 and connected with a plurality of through bolts 7 and nuts (not shown). A wheel 12 is rotatably provided within the flange 6. The core plate 4 is By providing several slits 8, it is formed into a comb shape having teeth 13. And pickpocket A coil 9 surrounding the secondary conductor 2 is housed within the net 8 .

0004 In order to center this coil 9 within the primary core 1, the conventional method was as shown in FIG. 2(b). A cushioning material is provided between the bottom of the stacked slits 8 and the outer circumferential surface of the coil 9. The thickness of the felt mat 14 is adjusted by interposing the felt mat 14. . After centering is completed, the primary core 1 is dipped in varnish and dried to harden the whole.

[0005] On the other hand, in the secondary conductor 2, the outer peripheral surface of the round bar-shaped magnetic conductor 10 is covered with a non-magnetic conductor 11. It is formed as follows.

[0006]

[Problem that the idea aims to solve]

However, if the thickness of the felt mat is made into one type, the coil outer diameter may be inconsistent or Misalignment becomes large due to distortion and unevenness in coil thickness. How to correct misalignment It takes time to disassemble and change the thickness of the felt mat.

[0007] Therefore, the purpose of this invention is to provide a linear motor that solves this problem. do.

[0008]

[Means to solve the problem]

The structure of the present invention to achieve this purpose is to form multiple slits in a long plate. By stacking multiple comb-shaped core plates with many teeth to form a core group, Multiple core groups are arranged radially and connected to each other with the slits located on the inside. By doing so, the primary core is constructed and the coil is housed within the slit of the primary core. Therefore, it can be moved freely through the air gap into the space surrounded by the core group in the primary core. In a linear motor in which a long secondary conductor is inserted through the coil, it protrudes inward from the coil. There is a gap between the teeth of adjacent core groups among the teeth of each core group and the inner peripheral surface of the coil. It is characterized by having a rust inserted through it.

[0009]

[Effect]

A wedge between the tips of the teeth of adjacent core groups and inside the inner peripheral surface of the coil. is inserted through the wedge, which prevents the coil from moving inside the wedge. It will be done. And since the wedges are arranged at approximately equal intervals along the circumference of the coil, the primary The coil is completely fixed to the side core and centered. .

0010

【Example】

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. Note that this example Since this is an improved part of the conventional linear motor, the same parts have the same numbers as the conventional linear motor. The explanation will be omitted and only the different parts will be explained.

[0011] The configuration of the linear motor according to the present invention will be explained based on FIGS. 1(a) to (c). . FIG. 1(b) is a front view of the linear motor, and FIG. 1(c) is an A-A in FIG. 1(b). 1(a) is an enlarged view of section C in FIG. 1(c).

0012 As shown in FIG. 1(a), the teeth of each core group 5 protrude from the inside of the coil 9. There is a space between the teeth 13 in adjacent core groups 5 and approximately inside the coil 9. A triangular space 15 is formed. A wedge 16 with a rectangular cross section is inserted into this space 15. be done. This wedge 16 has the same length as the entire length of the core group 5, as shown in FIG. 1(b). In this embodiment, since the primary side core 1 is composed of four core group 5, four cores are provided. A wedge 16 is used. The gap G between adjacent core groups 5 is such that the wedge 16 is removed. The width W of the wedge is set to be smaller than the width W of the wedge.

[0013] Next, the operation of the linear motor will be explained. Four core groups 5 are sandwiched between flanges 6. After integrating and inserting the coil 9 between each slit 8, proceed as follows. Center the coil 9. As shown in FIG. 1(a), it protrudes from the inner circumferential surface of the coil 9. A long wedge 16 is inserted between the teeth 13 of the core group 5. This wedge is It will be inserted at four locations in the circumferential direction. As a result, the inner circumferential surface of the coil 9 It is set at a position a distance S from the tip of the tooth 13 of the group 5. In other words, each of the four core groups The position of coil 9 with respect to 5 is now the same, which means that the centering of coil 9 has been performed. Ru. Since G<W, the wedge 16 will not come off and centering will be completed. Soak the cod in varnish and let it dry. With the above, primary side core 1 and primary side core 1 and coil 9 The assembly is completed.

[0014]

[Effect of the idea]

As can be seen from the above explanation, the linear motor according to the present invention has the following effects. There is.

[0015] (a) A small number of wedges to position a large number of coils (in the case of 4 core groups) It is possible to center the coils at once using 4 wedges, making it easy to center the coils. It can be done easily and at low cost.

[0016] (b) The wedge is pinched between the teeth of adjacent core groups and the inner peripheral surface of the coil and comes off. The coil is positioned reliably with respect to the primary core, and there is no possibility of misalignment after centering. will not occur.

[Brief explanation of drawings]

FIG. 1 relates to an embodiment of a linear motor according to the present invention, FIG. 1(a) is an enlarged view of section C in FIG. 1(c), FIG. 1(b) is a front view of the linear motor, and FIG. 1(c) is A-A in Figure 1(b)
Arrow view.

FIG. 2 relates to a conventional linear motor, and FIG. 2(a) is a front view, and FIG. 2(b) is a view taken along the line BB in FIG. 2(a).

[Explanation of symbols]

1...Primary side core 2... Secondary conductor 3...Air gap 4... Core board 5...Core group 8...Slit 9...Coil 13...teeth 15...Space 16...Wedge.

Claims (1)

[Scope of utility model registration request] Claim 1: By forming a plurality of slits in a long plate material, a plurality of comb-shaped core plates having a large number of teeth are laminated to form a core group, and the core group is radially arranged with the slits located on the inside. A primary core is constructed by arranging multiple coils and connecting them to each other, and the coil is housed in the slit of the primary core, allowing the coil to move freely through the air gap into the space surrounded by the core group in the primary core. In a linear motor in which a long secondary conductor is inserted, a wedge is inserted between the teeth of adjacent core groups among the teeth of each core group that protrude inward from the coil and the inner peripheral surface of the coil. A linear motor featuring