KR100532035B1 - Rotor assembly for reciprocating motor and manufacture method thereof - Google Patents

Abstract

The present invention relates to a mover assembly of a reciprocating motor and a method of manufacturing the same. The present invention relates to a mover body disposed in an air gap between an inner stator and an outer stator, and fixed to an outer circumferential surface of the mover body. Reciprocating motor including permanent magnets reciprocating with the mover body along the flux direction between the inner and outer stators, and a mixing member made of fiber and resin to wrap and fix the permanent magnets. Arranging the permanent magnets at equal intervals on the outer circumference of the movable body, and the fiber and resin are mixed into a sheet or wire-shaped mixing member. Wrapping the permanent magnets, and by performing the plastic member by the step of firmly fixing the permanent magnets through the hardening, by making the permanent magnets on the mover body Yet easily and can be firmly fixed, by forming the movable body of a non-magnetic material while non-conductive material to prevent the magnetic force of the permanent magnet leak.

Description

Mover assembly of reciprocating motor and its manufacturing method {ROTOR ASSEMBLY FOR RECIPROCATING MOTOR AND MANUFACTURE METHOD THEREOF}

The present invention relates to a mover assembly of a reciprocating motor and a method of manufacturing the same, and more particularly to a mover assembly of the reciprocating motor and a method of manufacturing the same that can easily and firmly fix permanent magnets.

In general, a reciprocating motor is a deformation of the magnetic field (Magnet Field) of a three-dimensional motor in the form of a flat plate, the plate-shaped mover assembly is also mounted on the upper side of the stator assembly formed of a flat plate to move in a straight line It is to be.

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 stator assembly is disposed between the outer stator and the inner stator. A reciprocating motor has been introduced, in which a winding coil is mounted on one of the stators, and a corresponding magnet assembly is attached to permanent magnets so that the mover reciprocates in the axial direction by the flux of the winding coil.

1 is a half sectional view schematically showing a conventional reciprocating motor from the side, and FIG. 2 is a half sectional view schematically showing a conventional mover assembly from the front.

As shown therein, the conventional reciprocating motor is composed of a stator assembly 10 forming a flux and a mover assembly 20 reciprocating according to the flux of the stator assembly 10.

The stator assembly 10 has a plurality of iron pieces stacked in a cylindrical shape and the winding coil C is mounted therein. It consists of an inner stator 12 inserted into a certain gap therein.

The mover assembly 20 is formed in a cylindrical shape and corresponds to the mover body 21 arranged to move between the outer stator 11 and the inner stator 12 and the winding coil C of the stator assembly 10. Permanent magnets 22 mounted at equal intervals on the outer circumferential surface of the mover body 21 and are formed in a cylindrical shape to surround the permanent magnets 22 to be bent after forcibly pressed against the outer circumferential surfaces of the permanent magnets 22. It consists of a magnet cover 12 or welding.

Reference numeral 21a in the drawing indicates a magnet mounting groove.

The operation of the conventional reciprocating motor for a compressor is as follows.

That is, when a current is applied to the winding coil C, flux is formed between the outer stator 11 and the inner stator 12 in different directions according to the direction of the current, and permanently according to the direction of the flux. As the magnets 22 are pulled or pushed, the mover body 21 reciprocates together, where a piston (not shown) is coupled to the mover body 21 together with the mover assembly 20. Compressing the fluid while reciprocating in the cylinder (not shown).

However, in the conventional reciprocating motor as described above, as shown in FIG. 2, the magnet cover 23 is formed in a cylindrical shape, whereas the permanent magnets M have a height difference h due to each processing error. Not only the indentation work itself is difficult, but there is a fear that the magnet is damaged during excessive indentation, and the permanent magnets 22 may be removed from the mover body.

In addition, in view of the above problems, the magnet cover 23 may be press-fitted and then fixed by spot welding. However, even though the magnet cover 12 is made of a thin plate, the welding work is difficult and the welding strength is diarrhea. There is a concern that the magnetic cover 23 is removed because it is weak, and also the welder body 21 has to be made of metal for welding, and thus, the magnetic force is leaked, thereby degrading the efficiency of the motor.

The present invention has been made in view of the problems of the conventional reciprocating motor as described above, and a movable assembly of the reciprocating motor and a method for manufacturing the reciprocating motor that can be easily and firmly fixed to the cylindrical body of the movable body is formed. The purpose is to provide.

It is also an object of the present invention to provide a mover assembly of a reciprocating motor and a method of manufacturing the same, in which the mover body is made of a non-magnetic material and a non-conductive material so as to prevent leakage of the magnetic force of the permanent magnet.

To achieve the object of the present invention, a mover body disposed in an air gap between an inner stator and an outer stator, and fixed to an outer circumferential surface of the mover body to move along a flux direction between the inner stator and the outer stator Permanent magnets reciprocating with the magnetic body, and a mixed member made of fiber and resin so that each permanent magnet is pressed and fixed to the outer peripheral surface of the movable body wrapped around the outer peripheral surface of the permanent magnets An actuator assembly of a reciprocating motor is provided.

In addition, the step of arranging the permanent magnets on the outer periphery of the mover body at equal intervals, and formed into a sheet or wire shape of the fiber wire (resin) mixed with the fiber while turning the mover body To wrap the outer circumferential surface of the permanent magnets with a mixing member wound on a roll, and the mixing member firmly fixes the permanent magnets through plastic hardening. Is provided.

Hereinafter, a mover assembly and a manufacturing method of the reciprocating motor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 3 is a half sectional view schematically showing the present invention reciprocating motor from the side, Figure 4 is a half sectional view schematically showing the mover assembly of the present invention, Figure 5 shows a modification to the mover assembly of the present invention 6A and 6B are perspective views illustrating a process of maintaining the shape of the mixing member in the mover assembly of the present invention, respectively.

As shown therein, the mover assembly 100 of the reciprocating motor according to the present invention includes a mover body 110 formed in a cylindrical shape and disposed to move between the outer stator 11 and the inner stator 12. In order to correspond to the winding coil C of the outer stator 11, the permanent magnets 120 mounted on the outer circumferential surface of the mover body 110 at equal intervals and the mixing member 130 surrounding and fixing the permanent magnets 120. It is composed of

The mover body 110 is formed in a cylindrical shape to be inserted into the gap between the outer stator 11 and the inner stator 12, the magnet mounting groove so that each of the permanent magnets 120 is inserted into the outer peripheral surface to a depth of about half 111 are formed at equal intervals on the same circumference.

In addition, the movable body 110 is inclined surface so that the outer peripheral surface is gradually lowered away from the permanent magnet 120 as a starting point, as shown in Figure 5 in consideration of the strength of the mixing member 130 in the projection on the side or front 112 is formed, the side surface is preferably formed with holes (not shown) to reduce the fluid resistance during the reciprocating motion of the mover body (110).

In addition, the mover body 110 may be formed of a non-magnetic metal in consideration of magnetic leakage or more preferably a non-magnetic and non-conductive plastic material, in particular in the case of plastic material carbon fiber to reinforce strength It is preferable to mix a carbon fiber or a glass fiber.

The permanent magnets 120 may be formed in an arc-shaped cross-sectional shape having the same inner circumferential surface length and outer circumferential surface length in front projection so as to correspond to the outer circumferential surface of the cylindrical mover body 110, but in some cases, the magnet mounting groove 111 may be formed. Permanent magnets 120 may also be formed in a rectangular shape in a plane. The resin 132 of the mixing member 130 to be described later is interposed between the permanent magnets 120.

The mixing member 130 is formed by mixing a fiber 131 such as a carbon fiber wire and a glass fiber wire or a Kevlar fiber wire and a resin 132 such as epoxy, polyester, or phenol mixed with each other. ) Or a wire shape. Here, the fiber wire 131 may be woven in a "checkerboard" or "lattice" shape so that a plurality of dogs are arranged side by side only in one direction by a predetermined width or double the compressive force.

The mixing member 130 may have a substantially circumferential grain formed on the outer circumferential surface of the mixing member 130 to include a constant roughness or at least one parting line. That is, in the case where the mixing member 130 is wound with the compressed film P and cured as shown in FIG. 6A, the above-described grain 130a is formed on the outer circumferential surface, and the mold M is formed in the mixing member 130 as shown in FIG. 6B. In the case of covering and curing, the above-described parting line 130b is generated.

In addition, it is advantageous in terms of strength that the mixing member 130 is formed up to a hole around the side of the mover body 110.

The process of manufacturing the mover assembly of the reciprocating motor according to the present invention as described above is as shown in Figures 7a to 8.

First, when the mover body 110 is made of metal, it is heated at a predetermined temperature to remove magnetism, while in the case of resin, the permanent magnet is formed by adding a reinforcing agent such as carbon fiber wire or glass fiber wire to the resin. After grinding the part to be seated 120 by post processing, the permanent magnets 120 are arranged at equal intervals on the outer circumference of the mover body 110.

At this time, as the outer peripheral surface of the mover body 110 moves away from the magnet mounting groove 111, the height is lowered to form an inclined surface 112, and the thickness of the mixing member 130 becomes thicker. Strength of 130 may be stronger to more effectively fix the permanent magnets 120.

Next, the sheet or wire-shaped fiber wire 131 is guided to a mixing container (unsigned) containing the resin 132, and the fiber wire 131 is mixed with the resin 132 in the mixing container. After the mixing member 130 is manufactured to guide the position of the movable body 110 to the winding to wrap the permanent magnets (120).

Here, the mixing member 130 is a so-called "dry" method to surround the permanent magnets 120 in a dry state (prepreg) to some extent by mixing the fiber wire 131 and the resin 132 in advance It is also possible to use a so-called "wet process" in which the fiber wire 131 is impregnated in the resin 132 immediately before the permanent magnets 120 are wrapped with the fiber wire 131.

"Dry process" as shown in Figure 7a, the permanent magnet 120 is fixed to the movable body (10) attached to the rotating body (unsigned) while the mixing member 130 is wound around the mixing By placing the member roll 200 to rotate the mover body 110, the mixing member 130 of the prepreg state to surround the permanent magnets (120).

"Wet method" is fixed to the mover body (110) attached to the permanent magnets 120 to the rotating body (unsigned), as shown in Figure 7b while the fiber wire 131 is wound on the fiber The wire rod 300 is disposed and a resin container (unsigned) containing the resin 132 is disposed between the mover body 110 and the fiber wire roll 300 so that the fiber wire 131 is formed of the resin 132. To impregnate and mix first, and then to wrap the permanent magnets 120 of the mover body 110 soon after.

Finally, the mixing member 130 is wrapped in the compression film (P) so that the mixing member 130 to maintain a constant shape and plasticized by hot air or hardened with a hot air or a predetermined shape of the mold (M) ) And the plastic member is hardened by hot air in the state of maintaining the shape thereof so that the mixing member 130 firmly fixes the permanent magnets 120.

At this time, in the case of maintaining the shape of the mixing member 130 by using the pressing film (P), after the removal of the pressing film (P) approximately circumferential grain (130a) remains to include a certain roughness while the mold (M) In the case of using), a parting line 130b remains at the junction between the upper and lower molds.

In this way, the permanent magnets are fixed by using a mixing member in which the fiber wire and the resin are mixed, and the mixing members are hardened so that each permanent magnet is fixed to the movable body, even though the permanent magnets are somewhat unevenly mounted due to processing errors. Since the members are uniformly compressed on the outer circumferential surface of each permanent magnet before hardening, the permanent magnets can be easily and firmly fixed.

In addition, since the member fixing the permanent magnets is made of a resin system, the movable body may also be formed of a non-magnetic and non-conductive resin system, thereby preventing the leakage of magnetic force, thereby improving the efficiency of the motor.

The mover assembly of the reciprocating motor and the method of manufacturing the same according to the present invention comprise arranging permanent magnets on the outer circumferential surface of the mover body and winding and curing the permanent magnets with a mixing member mixed with a fiber wire and a resin, thereby fixing the mover body. Permanent magnets can be easily and firmly fixed to the movable body, and the movable body can be formed of a non-magnetic material and a non-conductive material to prevent the magnetic force of the permanent magnets from leaking.

Figure 1 is a half sectional view schematically showing a conventional reciprocating motor from the side,

Figure 2 is a half sectional view schematically showing a conventional mover assembly from the front,

Figure 3 is a half cross-sectional view schematically showing the present invention the reciprocating motor,

Figure 4 is a half cross-sectional view schematically showing the invention mover assembly from the front,

5 is a detailed view showing a modification to the mover assembly of the present invention;

6a and 6b are respectively a perspective view showing a process of maintaining the shape of the mixing member in the mover assembly of the present invention,

7a and 7b is a schematic view showing a process of winding the mixing member in the mover assembly of the present invention,

8 is a flow chart showing a process of manufacturing the mover assembly of the present invention.

** Description of symbols for the main parts of the drawing **

100: mover assembly 110: mover body

111: magnet mounting groove 112: inclined surface

120: permanent magnet 130: mixing member

130a: Texture 130b: Parting Line

131: fiber wire 132: resin

Claims (17)

A mover body disposed in an air gap between the inner stator and the outer stator, Permanent magnets fixed to an outer circumferential surface of the mover body and reciprocating together with the mover body in a flux direction between the inner and outer stators; 24. A mover assembly of a reciprocating motor including a mixing member made of fiber and resin so that each of the permanent magnets is fixed to the outer circumferential surface of the mover body by wrapping the outer circumferential surfaces of the permanent magnets. The mover assembly of claim 1, wherein the mixing member is formed in a sheet shape or a wire shape to surround the outer circumferential surfaces of the permanent magnets. The mover assembly of claim 1, wherein the mixing member is plastically cured by heat treatment. 4. The mover assembly of claim 3, wherein the mixing member has a constant circumferential grain formed on an outer circumferential surface thereof and has a constant roughness. 4. The mover assembly of claim 3, wherein the mixing member is formed with at least one parting line. The mover assembly of claim 1, wherein a resin is interposed between the permanent magnets. 2. The mover assembly of claim 1, wherein the mover body is a mixture of plastic and reinforcement. 8. The mover assembly of claim 7, wherein the reinforcement is made of carbon fiber or glass fiber. The mover assembly of claim 1, wherein the mover body is formed to be inclined so that the mover body is gradually lowered away from the permanent magnet. 2. The mover assembly of claim 1, wherein the mixing member is formed up to a periphery of the hole provided on the side of the mover body. Arranging the permanent magnets at equal intervals on the outer circumference of the mover body; Wrapping the outer circumferential surface of the permanent magnets with a mixing member wound on a roll by forming a sheet or wire shape in which fiber and resin are mixed while rotating the movable body; Method of manufacturing a mover assembly of a reciprocating motor, characterized in that the mixing member is carried out by the step of firmly fixing the permanent magnets through plastic curing. 12. The method of claim 11, wherein if the mover body is metal, heat treating the mover body prior to arranging the permanent magnets. 12. The reciprocating type according to claim 11, wherein when the movable body is made of resin, a movable grinding step is performed, in which a reinforcing agent is added to the resin to roughly shape and then grind the portion where the permanent magnet is to be seated by post processing. Method of manufacturing a mover assembly of a motor. 12. The method of claim 11, further comprising: inducing a sheet or wire-shaped fiber wire to a resin mixing container before wrapping the permanent magnet with the mixing member; And then wrapping the permanent magnet with the mixing member. 12. The method of claim 11, wherein the step of wrapping the permanent magnets with the mixing member and then fixing the mixing member to maintain a constant shape. 16. The method of claim 15, wherein the mixing member is plastically cured in a state in which the mixing member is wrapped with a compression film to maintain a shape. 16. The method of claim 15, wherein the mixing member is inserted into a mold and plastically cured while maintaining a shape.