KR20040082210A - Apparatus for supporting stator of reciprocating motor - Google Patents

Abstract

PURPOSE: An apparatus is provided to prevent a contraction of a bobbin and a core block caused due to molding pressure during molding and prevent a collision between a mover and a stator. CONSTITUTION: An apparatus comprises a bobbin(111) for accommodating a coil(C); a core block(112) formed by stacking a plurality of stator cores and fitted to the outer surface of the bobbin; a core support member(113) interposed between the outer surface of the bobbin and the inner surface of the core block so as to support the core block; and a molding body(114) for molding the bobbin, core support member, and the core block so as to fix the core block at the bobbin. The core support member includes a first horizontal portion(113a) which tightly contacts the outer surface of the bobbin, a vertical portion(113b) radially protruded from the center of the first horizontal portion; and a second horizontal portion(113c) formed in parallel to the first horizontal portion at the end of the vertical portion.

Description

Stator support for reciprocating motors {APPARATUS FOR SUPPORTING STATOR OF RECIPROCATING MOTOR}

The present invention relates to a stator support device for a reciprocating motor, and more particularly, to a stator support device for a reciprocating motor that can prevent deformation of the stator caused by molding pressure or shrinkage of the molding material when molding the stator core.

In general, a reciprocating motor is a deformation of a magnetic field of a three-dimensional motor (Magnet Field) into a flat plate shape, so that the mover assembly formed of a flat plate is also placed on the upper side of the stator assembly formed of a flat plate to move in a straight line according to the change of the magnetic field. It is.

Recently, the stator assembly is divided into a cylindrical outer stator and an inner stator, and arranged to overlap a predetermined gap, and the movable assembly is disposed between the outer stator and the inner stator, and one of the outer stator and the inner stator is disposed. A reciprocating motor has been introduced in which a winding coil is mounted on a side stator, and a magnet assembly is attached to a corresponding movable assembly so that the mover reciprocates axially by a flux of the winding coil.

1 is a cross-sectional view of a conventional reciprocating motor from the front, Figure 2 is a side view.

As shown in the drawing, a conventional reciprocating motor includes a stator assembly 10 that forms a flux and a mover assembly 20 that reciprocates according to the flux of the stator assembly 10.

The stator assembly 10 is formed with a cylindrical outer stator 11, and also formed into a cylindrical shape with a predetermined inter-core distance (hereinafter mixed with voids) t inside the outer stator 11. The inner stator 12 is composed of.

The outer stator 11 includes a bobbin body 11a for inserting the winding coil C therein and a plurality of thin stator cores S stacked in the outer surface of the bobbin body 11a. It consists of a block 11b and a molding 11c which molds the connection part of the core block 11b, and fixes it to the bobbin body 11a.

The bobbin body 11a forms the insulating material like plastic in a hollow annular shape.

The core block 11b is formed in a "memory" shape and an opposite "reverse memory" shape so as to be fitted to each other on both sides of the bobbin body 11a.

The molding body 11c is made of an insulator such as epoxy to continuously fix the outer peripheral surface of the bobbin body 11a and the connecting portion of the core block 11b together.

The mover assembly 20 has a mover body 21 arranged to move between the outer stator 11 and the inner stator 12 and the mover body so as to correspond to the winding coil C of the stator assembly 10. The outer circumferential surface of the (21) is composed of magnets 22 fixed at equal intervals along the circumferential direction.

The conventional reciprocating motor as described above operates as follows.

That is, when a current is applied to the winding coil C of the outer stator 11, a flux is formed around the winding coil C to the inner stator 12 along one path of the outer stator 11. Flowing and forming again a kind of 'closed loop' flowing to the other path of the outer stator 11, the magnet 22 of the movable assembly 20 on the flux formed by the winding coil (C) As the magnet 22 interacts with the flux of the winding coil C, the movable body 21 linearly reciprocates along the flux direction.

In order to manufacture such a reciprocating motor, first, a plurality of "memory" shaped stator cores (S) are punched on a steel sheet, and then the core blocks 11b are stacked in a "memory" or "reverse memory" shape. The core block 11b is inserted into the outer surface of the bobbin body 11a into which the winding coil C is inserted in a predetermined mold, and then a molding material is injected to the outer circumferential surface of the bobbin body 11a and the core block 11b. It was to fix the molded part of the connection integrally.

However, in the conventional reciprocating motor as described above, a part of the core block 11b is caused by the molding pressure generated when the molding material is injected or the shrinkage force generated while the molding is hardened, so that the outer stator 11 is as shown in FIG. 3. Pressing in the direction of the center of the deformed by this, the distance between the core (t) between the outer stator 11 and the inner stator 12 is narrowed to maintain the proper voids of the stator 10 and the mover 20 There was a fear that the reliability of the motor or the efficiency of the motor may be reduced due to the collision.

The present invention has been made in view of the problems of the conventional reciprocating motor as described above, to provide a stator support device for a reciprocating compressor that can prevent the circular damage by the molding material when manufacturing the outer stator. There is also an object of the present invention.

1 is a cross-sectional view showing a conventional reciprocating motor from the front,

2 is a side view of a conventional reciprocating motor,

Figure 3 is a schematic view showing a part of the assembled state of the conventional reciprocating motor,

Figure 4 is a half sectional view showing the present invention the reciprocating motor from the front,

5 is a side view of the reciprocating motor of the present invention;

6 is an exploded perspective view of a part of the present invention reciprocating motor,

7 and 8 are schematic views showing a modification of the core support member in the reciprocating motor of the present invention.

*** Explanation of symbols for main parts of drawing ***

100: stator assembly 110: outer stator

111: bobbin body 112: core block

112a: support member insertion groove 113: core support member

113a: first horizontal portion 113b: vertical portion

113c: second horizontal portion 114: molding

120: inner stator 133,143: core support member

200: mover assembly B: fastening bolt

C: Winding coil S: Stator core

In order to achieve the object of the present invention, a bobbin body formed by inserting a winding coil into an annular shape, a core block laminated with a plurality of stator cores and inserted into an outer surface of the bobbin body, and a reinforcement having a predetermined strength is annular. And a core support member for supporting the core block interposed between the outer circumferential surface of the bobbin body and the inner circumferential surface of the core block opposite thereto, and molding the core block together with the bobbin body, the core support member and the core block. Provided is a stator support device for a reciprocating motor including a molding to be fixed.

Hereinafter, a reciprocating motor of the present invention and a reciprocating compressor using the same will be described in detail with reference to an embodiment shown in the accompanying drawings.

Figure 4 is a half sectional view showing the present invention reciprocating motor from the front, Figure 5 is a side view of the reciprocating motor of the present invention, Figure 6 is an exploded perspective view of a part of the reciprocating motor of the present invention, Figures 7 and 8 Is a schematic view showing a modification of the core support member in the reciprocating motor of the present invention.

As shown in the drawing, the reciprocating motor according to the present invention includes an outer stator 110 fixed to a frame and an inner stator 120 disposed with a predetermined gap t inside the outer stator 110. The stator assembly 100 and the mover assembly 200 reciprocating in a straight line through an air gap t between the outer stator 110 and the inner stator 120.

The outer stator 110 includes a bobbin body 111 into which a winding coil C is inserted, and a plurality of thin stator cores S, which are stacked on the outer surface of the bobbin body 111 to be coupled to each other. The core support member 113 for supporting the core block 112 between the block 112, the outer circumferential surface of the bobbin body 111, and the core block 112, the bobbin body 111, and the core support member 113. And it is made of a molding body 114 for fixing the core block 112 to the bobbin body 111 by molding together the connection of the core block (112).

The bobbin body 111 forms an insulating material such as plastic in a hollow annular shape.

The core block 112 is formed in a "memory" shape and a "reverse memory" shape opposite to each other to be fixed to each other on both sides of the bobbin body 111.

Support member inserting grooves 112a and 112a are formed at both opposite end edges of the core block 112 so that the first horizontal portion 113a and the second horizontal portion 113c of the core supporting member 113 to be described later can be inserted. It is desirable to reduce the diameter of the motor.

The core support member 113 is formed in an "H" cross-sectional shape as a whole, and is formed in an annular shape. The inner diameter of the core support member 113 is substantially the same as the outer diameter of the bobbin body 111, and the outer diameter is almost the same as the outer diameter when the core block 112 is coupled. Form.

In addition, the core support member 113 is in close contact with the outer circumferential surface of the bobbin body 111 as shown in FIG. 4 or 5 and the first horizontal portion 113a on which the inner circumferential surfaces of the opposite ends of the core blocks 112 are placed. 1 a vertical portion 113b protruding radially from the center of the horizontal portion 113a to be in close contact with opposite end surfaces of the core blocks 112 on both sides, and the first horizontal portion 113a at the end of the vertical portion 113b. The second horizontal portion 113c is formed to be parallel to the outer peripheral surface of the opposite ends of the core blocks 112 on both sides.

In addition, the core support member 113 is a metal having a predetermined rigidity, and considering the efficiency of the motor, a non-conductive metal is preferable rather than a conductor.

Here, as shown in FIG. 7, the core support member 133 may have a concave cross-sectional shape. That is, the horizontal portion 133a, which is in close contact with the outer circumferential surface of the bobbin body 111, is placed on the inner circumferential surface of the opposite ends of the core blocks 112, and protrudes radially from the center of the horizontal portion 133a to both the core blocks 112. It can also be formed as a vertical portion (133b) in which the opposite end surface of the () is in close contact.

The molding body 114 is formed of an insulator such as epoxy so that the outer circumferential surface of the bobbin body 111 and the connecting portion of the core support member 113 and the core block 112 can be continuously fixed together.

The mover assembly 200 includes a mover body 210 arranged to move between the outer stator 110 and the inner stator 120 and the winding body C of the stator assembly 100. The magnets 220 are fixed to the outer circumferential surface of the 210 at equal intervals along the circumferential direction.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

The stator support device of the reciprocating motor of the present invention as described above has the following effects.

That is, the process of manufacturing and assembling the outer stator 110, first, after inserting the winding coil (C) inside the molding to produce the bobbin body 111 while punching the steel plate in a predetermined shape and then laminated to the core Block 112 is formed. In addition, an annular core support member 113 is manufactured using a metal having a predetermined strength.

Next, insert the 'memory' and the 'reverse memory' core block 112 on both sides of the core support member 113, and then pre-assemble it, together with the bobbin body 111 is arranged in a predetermined mold. At this time, it is preferable to form support member inserting grooves 112a at both ends of the core block 112 so that the inner circumferential surface or the outer circumferential surface of the core block 112 coincides with the inner circumferential surface or the outer circumferential surface of the core support member 113.

Next, a molding agent made of an insulating material is injected into the mold to include both the outer circumferential surface of the bobbin body 111, the outer circumferential surface of the core support member 113, and the connection portion of the core block 112, and then the molding agent is cured to form a molding body ( 114) to complete the assembly of the outer stator.

As such, when the molding is formed to fix the core block to the bobbin body, the core block is made of plastic material due to the molding pressure generated during the injection of the molding agent into the mold or the shrinkage force generated when the molding agent is cured. In addition, the Omrad may cause deformation, but through the core support member having a predetermined strength between the outer circumferential surface of the bobbin body and the inner circumferential surface of the core block corresponding to the core block to withstand both the above-mentioned molding pressure and shrinkage force core block And the deformation of the bobbin body by the molding body can be suppressed in advance, and through this, the distance between the cores between the outer stator and the inner stator can be kept constant, thereby preventing collision between the mover and the stator or deterioration of the motor efficiency. .

On the other hand, there is a modification to the core support member according to the present invention is as follows.

In other words, in the above-described example, the core support member 113 is formed in an "h" or "yo" -shaped cross-sectional shape to insert and fix both ends of the core block 112 to both groove portions or stepped portions. For example, as shown in Fig. 8, the core supporting members 143 and 143 are formed in pairs in the form of a "dimple" shape so as to surround opposite ends of each core block 112, and then the core. The support members 143 and 143 are abutted to be arranged on the outer circumferential surface of the bobbin body 111 and the butted portion is molded together with the bobbin body 111 to form the molding body 114.

In this case, the core support members 143 and 143 may be molded by simply butt arranging, but in some cases, two core support members 143 and 143 to fix the position of the core support members 143 and 143 before molding. ) May be coupled to the fastening bolt (B). Fastening bolt (B) is preferably fixed between the core block (112).

In this way, an annular core support member having rigidity is interposed between the outer circumferential surface of the bobbin body and the inner circumferential surface of the core block, thereby deforming the omurade of the core block and the bobbin body by molding pressure or contraction force during molding operation as in the above-described example. It can be prevented in advance and through this to maintain a constant distance between the core between the outer stator and the inner stator to prevent the collision between the mover and the stator or the efficiency of the motor.

The stator supporting apparatus of the reciprocating motor according to the present invention is formed by inserting an annular core support member having a predetermined strength between the bobbin body and the core block, and then molding the bobbin body and the core block, The contracting force can suppress the phenomenon of the bobbin body and the core block being retracted, thereby keeping the distance between the stators constant, thereby reducing the motor's efficiency due to the deterioration of the reliability of the motor due to the collision between the mover and the stator or the non-uniformity of the motor. Can be prevented in advance.

Claims (6)

A bobbin body inserted into a winding coil to form an annular shape, A core block laminated with a plurality of stator cores and inserted into an outer surface of the bobbin body; A core support member for forming the reinforcement having a predetermined strength in an annular shape and interposed between the outer circumferential surface of the bobbin body and the inner circumferential surface of the core block opposite thereto; A stator support apparatus for a reciprocating motor including a bobbin body, a core support member, and a molding body for molding the core block together by molding the core block together. The method of claim 1, The core block is formed symmetrically with each other, the stator support device for a reciprocating motor, characterized in that the insert fixed to both sides of the outer surface of the bobbin body. The method of claim 2, The core supporting member is in close contact with the outer circumferential surface of the bobbin body and is vertically projected in a radial direction from the center of the first horizontal portion to the first horizontal portion on which the opposite inner circumferential surfaces of both core blocks are placed, and the opposite end surface of the two core blocks is in close contact with each other. And a second horizontal portion formed parallel to the first horizontal portion at the end of the vertical portion, the second horizontal portion being in close contact with the outer peripheral surfaces of the opposite core blocks. The method of claim 2, The core support member closely adheres to the outer circumferential surface of the bobbin body and surrounds the opposite end of the one core block, and the core support member closely adheres to the outer circumferential surface of the bobbin body and surrounds the opposite end of the other core block in the opposite direction to the first support member. Stator support device for a reciprocating motor, characterized in that consisting of a second support member for coupling. The method of claim 4, wherein The stator support device of the reciprocating motor, characterized in that the first support member and the second support member are coupled to the fastening bolt between the core block. The method according to claim 3 or 4, Stator support apparatus for a reciprocating motor, characterized in that the support member inserting grooves are formed on the inner and outer peripheral surfaces of the core block by the thickness of the core supporting member, respectively.