KR100374838B1 - Structure for absorbing collision of moving-part in linear motor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mover collision absorbing structure of a linear motor. The present invention relates to a stator including an outer core and an inner core inserted into the outer core at regular intervals, and inserted between the outer core and the inner core. And a linear motor including a mover linearly reciprocating by the interaction with the stator, the elastic body having a latching portion formed on one side of the inner core facing the mover and engaged with the engaging groove. The fastening part of the elastic shock absorbing member is configured to engage with the locking groove to absorb the collision with other parts when the overstroke of the mover occurs due to a malfunction of the motor drive, etc. It is to prevent damage.

Description

Movable Collision-Absorbing Structure for Linear Motors {STRUCTURE FOR ABSORBING COLLISION OF MOVING-PART IN LINEAR MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mover collision absorbing structure of a linear motor. In particular, a collision of a mover of a linear motor, which prevents collision with other parts as well as departure of parts when an excessive stroke of the mover constituting the motor occurs. It relates to an absorbent structure.

In general, a linear motor is a planar shape of a magnetic flux of an ordinary motor having a three-dimensional structure, and a flat moving part moves linearly on a plane according to a change in flux formed on a fixed part of a plane. It is to be.

FIG. 1 illustrates an example of the linear motor, and as illustrated therein, the linear motor has an outer core 10 formed in a cylindrical shape and an inner cylinder formed to be inserted into the outer core 10. A stator S composed of an inner core 20, a winding coil 30 coupled to the inner core 10 or an inner core 20, and a permanent magnet 41 are provided. It comprises a mover 40 which is inserted between the core 10 and the inner core 20 so as to be movable.

The outer core 10 and the inner core 20 constituting the stator S are formed of a cylindrical laminate stacked radially so that a plurality of lamination sheets 11 and 21 formed of a thin plate of a predetermined shape have a cylindrical shape. The inside of the outer core 10 is coupled to the bobbin 50 of the cylindrical form in which the coil is wound. The winding coil 30 is formed by winding the coil to form a multilayer on the bobbin 50, the bobbin 50 is used for ease of manufacture as well as electrical insulation of the winding coil 30. The winding coil 30 may be coupled to the inner core 70 as well as the outer core 10.

The mover 40 is coupled to the permanent magnet holder 42 and the permanent magnet holder 42 formed in a cylindrical shape so as to be inserted between the outer core 10 and the inner core 20 and the outer core 10. ) And a plurality of permanent magnets 41 positioned between the inner core 20.

When the linear motor as described above is supplied with power and a current flows in the winding coil 30, as shown in FIG. 2, the flux (around the winding coil 30) is caused by the current flowing through the winding coil 30. Flux) is formed and the flux forms a closed loop along the outer core 10 and the inner core 20. The permanent magnet 41 is forced in the axial direction by the magnetic flux formed by the flux formed on the outer core 10 and the inner core 20 and the permanent magnet 41, that is, the movable member 40. ) Is linearly moved in the axial direction between the outer core 10 and the inner core 20, the alternating direction of the current applied to the winding coil 30 alternately the linear movement of the mover 40 You exercise.

Such a linear motor is mounted in the system and constitutes a power source of the system by linear reciprocating motion generated by the mover 40 of the linear motor. On the other hand, as shown in Figure 3, when the linear motor generates a driving force in the linear reciprocating motion, the mover 40 for the energy storage and discharge and resonance for the linear reciprocating motion of the mover 40 Springs 60 are positioned on both sides of the permanent magnet holder 42 constituting the elastic support for the mover 40. In addition, when excessive stroke occurs due to a malfunction of the motor drive during linear reciprocation of the mover 40, the inner 40 is prevented from colliding with the mover 40 and the inner core 20. A collision absorbing structure is provided at one side of the core 20.

As an example of the conventional structure for the collision absorbing structure, an annular rubber ring 70 having a certain outer diameter is attached to one side of the inner core 20 by epoxy. The rubber ring 70 is attached to the inner core 20 facing the permanent magnet holder 42 of the mover 40.

Reference numeral 80 is a frame on which the inner core 20 is mounted.

In this structure, when the overstroke occurs in the process of linear reciprocation of the mover 40 by the interaction with the stator S, the permanent magnet holder 42 constituting the mover 40 has the rubber. The rubber ring 70 absorbs an impact while hitting the ring 70, thereby preventing the permanent magnet holder 42 and the inner core 20 from colliding and causing breakage of components.

However, the conventional structure as described above has the disadvantage that the rubber ring 70 is attached by an adhesive such as epoxy, so that the time required for adhering the rubber ring 70 is long, and the mover 40 is excessive. When the collision with the rubber ring 70 due to the stroke not only increases the likelihood of detachment of the rubber ring 70 due to breakage of the adhesive epoxy, etc., but also other dirts generated when the rubber ring is released. It is introduced between the 10 and the inner core 20 to cause scratches and breakage of the stator (S) and the mover (40).

The object of the present invention devised in view of the above point is to prevent the collision of the moving parts of the linear motor to prevent the collision of other parts as well as the departure of the parts when excessive stroke of the mover constituting the motor occurs. In providing a structure.

1 is a front sectional view and a side view showing an example of a general linear motor,

2 is a cross-sectional view showing an operating state of the linear motor;

3 is a cross-sectional view showing a state in which a spring is provided in the linear motor;

4 is a cross-sectional view of a linear motor having a linear motor mover collision absorbing structure according to the present invention;

Fig. 5 is a sectional view showing an operating state of the linear motor mover collision absorbing structure of the present invention. (Explanation of symbols for the main parts in the drawing)

10; Outer core 20; Inner core

22; Locking groove 40; Mover

90; Elastic buffer member 91; Buffer

92; Hanging part a; Inflow groove

b; Fixed Groove

In order to achieve the object of the present invention as described above, a stator including an outer core and an inner core inserted into the outer core at a predetermined interval, and inserted between the outer core and the inner core and mutually with the stator A linear motor comprising a mover linearly reciprocating by an action, wherein a latching groove is formed on one side of the stator facing the mover, and the latching of the elastic buffer member is an elastic body having a latching portion that is engaged with the locking groove. An actuator collision absorbing structure of a linear motor is provided, wherein the unit is coupled to and engaged with the locking groove.

Hereinafter, the linear motor mover collision absorbing structure of the present invention will be described according to the embodiment shown in the accompanying drawings.

4 illustrates a linear motor provided with an example of the linear motor mover collision absorbing structure according to the present invention. Referring to this, first, the linear motor has a cylindrical outer core 10 and the outer core 10. Stator (S) consisting of an inner core (20) formed in a cylindrical shape so as to be inserted into the interior of the outer core 10 or the inner coil (20) coupled to the coil 30 and the permanent magnet (41) Is provided and is configured to include a mover 40 is inserted to be movable between the outer core 10 and the inner core 20.

The outer core 10 constituting the stator S is formed in a cylindrical shape, and the bobbin 50 having a cylindrical shape in which a coil is wound is coupled to the inside of the outer core 10. The winding coil 30 is formed by winding the coil to form a multilayer on the bobbin 50, the bobbin 50 is used for ease of manufacture as well as electrical insulation of the winding coil 30. The winding coil 30 may be coupled to the inner core 20 as well as the outer core 10.

The inner core 20 is formed in a cylindrical shape to be inserted into the outer core 10, and an annular locking groove 22 is formed in the inner core 20. The locking groove 22 is formed on one side of the inner core 20 facing the mover 40. The locking groove 22 is formed in an annular shape and has a width greater than that of the inlet groove part a and the inlet groove part a having a predetermined width in cross-sectional shape, so that the stepped portion is formed. It consists of a fixing groove (b).

The hook portion is formed in an annular shape and has a cross section extending in an annular shape on one side of the buffer portion 91 and the buffer portion 91 and the cross section corresponding to the cross section of the locking groove 22. An elastic buffer member 90 consisting of 92 is coupled to the inner core 20. The elastic shock absorbing member 90 is fixedly coupled to the inner core 20 by being pressed into the engaging groove 22 of the inner core. The elastic buffer member 90 is preferably formed of a rubber material.

The mover 40 is a cylindrical portion 42a having a cylindrical shape inserted between the outer core 10 and the inner core 20 and a support portion 42b extending at one end of the cylindrical portion 42a. The permanent magnet holder 42 and the cylindrical portion (42a) of the permanent magnet holder 42 made of a plurality of permanent magnets 41 and positioned between the outer core 10 and the inner core 20, It is composed.

In addition, when the linear motor is applied to the system, the springs 60 are respectively located on both sides of the support part 42b of the permanent magnet holder 42 constituting the mover 40, and the outer springs 60 are separated from each other. Supported by water and the inner core 20 and the outer core 10 is fixed to a separate frame.

Hereinafter, the effect of the linear motor mover collision absorbing structure of the present invention will be described.

First, when the power is applied to the linear motor and a current flows in the winding coil 30, a flux is formed around the winding coil 30 by the current flowing in the winding coil 30, and the flux is an outer core that is a stator. 10) and along the inner core 20 to form a closed loop. The permanent magnet 41 is forced in the axial direction by the magnetic flux formed by the flux formed on the outer core 10 and the inner core 20 and the permanent magnet 41, that is, the movable member 40. ) Is linearly moved in the axial direction between the outer core 10 and the inner core 20, the alternating direction of the current applied to the winding coil 30 alternately the linear movement of the mover 40 You exercise.

As shown in FIG. 5, when the spring 60 is mounted, the spring 60 contracts and relaxes in accordance with the linear reciprocating motion of the mover 40 to store and release kinetic energy as elastic energy. In addition, resonance occurs with the power frequency.

On the other hand, when the mover 40 is excessively moved due to a malfunction of the motor drive controlling the linear motor, that is, when an excessive stroke of the mover 40 occurs, the mover 40 deviates from the stroke distance. While hitting the elastic buffer member 90. At this time, the elastic buffer member 90 is contracted to absorb the shock to prevent damage to the mover 40 and other components.

In addition, since the elastic buffer member 90 is coupled to the inner core 20 by engaging the engaging portion 92 of the elastic buffer member 90 with the locking groove 22 of the inner core, the elastic buffer member 90 is coupled to the inner core 20. ) Is firmly coupled to prevent separation. In addition, when the movable member 40 collides with the elastic buffer member 90, generation of foreign matter is excluded.

As described above, the mover collision absorbing structure of the linear motor according to the present invention absorbs the collision with other parts when the overstroke of the mover constituting the linear motor occurs, as well as the rigidity of the parts, resulting in the removal of parts and Preventing breakage has the effect of increasing the reliability.

Claims (3)

A stator including an outer core and an inner core inserted into the outer core at predetermined intervals, and a mover inserted between the outer core and the inner core and linearly reciprocating by interaction with the stator. In the linear motor, a latching groove is formed on one side of the stator facing the mover, and an engaging portion of an elastic buffer member, which is an elastic body having a latching portion that is fitted to the engaging groove, is coupled to the engaging groove and coupled. Collision absorbing structure of linear motor. The method of claim 1, wherein the engaging groove is formed in an annular shape, the cross-sectional shape of the inlet groove portion having a predetermined width and the inlet groove portion subsequent to the inlet groove portion is formed in a width larger than the inlet groove portion is characterized in that the stepped groove formed Impinger collision absorbing structure of linear motor. According to claim 1, wherein the elastic cushioning member is formed in an annular shape and the cross section is formed in a rectangular shape and extending in an annular shape on one side of the buffer portion and the hook portion is formed with a cross section corresponding to the cross section of the locking groove Movable collision absorbing structure of a linear motor, characterized in that made.