KR20120116797A - Guide apparatus of linear actuator - Google Patents

Abstract

PURPOSE: A guide apparatus of a linear actuator is provided to compact a product by guiding a minute linear motion of a movable element. CONSTITUTION: A plurality of guide units(110) is formed on both inner sides of a body(210) along a longitudinal direction, respectively. Each of the plurality of guide units comprises first and second quid surfaces(111,112) which are inclined in an opposite direction. A plurality of roller units(120) is arranged on both sides of a movable element(220) to the back and forth, respectively. Each of the plurality of roller units comprises first and second guide rollers(121,122) which are installed to be close to the first and second quid surfaces. The first and second quid surfaces of the guide unit are formed into a groove of a cross-sectional V-shape.

Description

Guide device of linear actuator {GUIDE APPARATUS OF LINEAR ACTUATOR}

The present invention relates to a guide device of a linear actuator, and more particularly, to guide the precise linear motion of the mover, to reduce the time and effort required for assembly and manufacturing cost, and to contribute to the compactness of the product. It relates to a guide device.

In general, the linear actuator is composed of a coil body and a permanent magnet, and energizes the coil body located in the magnetic field of the permanent magnet, so that the linear actuator is configured to obtain a driving force, that is, thrust by the Lorentz force, and the linear actuator is movable According to the structure of the ruler, it is classified into movable coil type and movable permanent magnet type.

In the movable coil type linear actuator, the stator consists of permanent magnets, and the mover consists of coils. In addition, the movable permanent magnet linear actuator has a stator composed of a coil and a movable member composed of a permanent magnet.

Such linear actuators are used to transport materials and devices for manufacturing semiconductor devices and glass substrates, or as driving devices for implementing other linear motions, and are widely used in many fields because they can control precise linear motion. It is used.

However, the conventional linear actuator requires a unit for guiding the linear motion of the mover in order for the mover to perform precise linear motion, which not only takes up a lot of space in the body but also has a complicated structure. Due to the large amount of time and effort is required to assemble, the cost of purchasing the parts to increase the manufacturing cost had a problem.

In addition, the conventional linear actuator has an inevitable increase in volume due to the guide unit of the linear motion, thereby having a difficulty in compacting the product.

In order to solve the conventional problems as described above, the present invention does not require a linear motion guide unit of a complex structure that requires a lot of space for installation, thereby reducing the time, effort and manufacturing cost required for assembly This helps guide the precise linear motion of the operator and contributes to the compactness of the product.

Other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the object as described above, according to an aspect of the present invention, in the device for guiding the mover installed in the body of the linear actuator, each side is formed along the longitudinal direction on both sides in the body, each in the opposite direction A plurality of guide portions comprising inclined first and second guide surfaces; And a plurality of roller units, each of which is provided back and forth on both sides of the mover, each of which comprises first and second guide rollers installed to be in contact with each of the first and second guide surfaces. .

The guide part may be formed of a groove having the first and second guide surfaces having a V-shaped cross-sectional shape.

The guide portion may cross the first and second guide surfaces perpendicular to each other, and the roller unit may radially bind the first and second guide rollers to a corner of the mover by a rotation shaft.

The roller unit, the first and second guide roller may be made of a bearing.

According to the guide device of the linear actuator according to the present invention, the present invention does not require a linear motion guide unit of a complicated structure that requires a lot of space for installation, thereby reducing the time, effort and manufacturing cost required for assembly This helps guide the precise linear motion of the mover and contributes to the compactness of the product.

1 is a perspective view showing a guide device of a linear actuator according to an embodiment of the present invention,
Figure 2 is a cross-sectional view showing a guide device of the linear actuator according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention, And the scope of the present invention is not limited to the following examples.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant explanations thereof will be omitted.

1 is a perspective view showing a guide device of a linear actuator according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a guide device of a linear actuator according to an embodiment of the present invention.

As shown in Figure 1 and 2, the guide device 100 of the linear actuator according to an embodiment of the present invention as a device for guiding the mover 220 installed in the body 210 of the linear actuator 200 , May include a plurality of guide parts 110 and a plurality of roller units 120.

On the other hand, in the linear actuator 200, for example, the stator 230 is installed on the inner bottom surface of the body 210, and the movable member 220 is separated from the stator 230 by the guide device 100 of the linear actuator. It is installed to have. Here, the mover 220 is the coil is wound, the stator 230 is made of a permanent magnet linear actuator 200 may be made of a movable coil type, on the other hand, the mover 220 is a permanent magnet, Since the stator 230 is made of a coil, the linear actuator 200 may be made of a movable permanent magnet.

Guide portion 110 is composed of a plurality, as in the present embodiment may be formed in a pair so as to face each other in the longitudinal direction on both sides in the body 210. Here, each of the guide parts 110 may be formed of the first and second guide surfaces 111 and 112 inclined in opposite directions. That is, the first guide surface 112 may be inclined in a direction opposite to the second guide surface 112 to cross the second guide surface 112.

The guide part 110 may be formed of a groove having first and second guide surfaces 111 and 112 having a V-shaped cross section, and the first and second guide surfaces 111 and 112 may be perpendicular to each other as in the present embodiment. Can cross.

The roller unit 120 is composed of a plurality of and provided on both sides of the movable member 220 before and after, respectively, each of the roller unit 120, the first and second guides are installed to contact each of the first and second guide surfaces (111, 112) It may be made of rollers (121, 122). In addition, as in the present embodiment, the roller unit 120 is provided with a pair of front and rear, respectively, based on one side of the mover 220 may be installed eight throughout the mover 220, not limited to this, It can be installed at various locations of the mover 220 with a number.

In the roller unit 120, the first and second guide rollers 121 and 122 may be radially bound to the corners of the mover 220 by the rotation shafts 121a and 122a. That is, in the roller unit 120, the rotation shafts 121a and 122a are arranged radially from a specific position at the corners of the mover 220 so that the first and second guide rollers 121 and 122 are rotated by the rotation shafts 121a and 122a. Allow to bind radially.

In the roller unit 120, as in the present embodiment, the first and second guide rollers 121 and 122 may be formed of bearings, for example, ball bearings. Therefore, when the first and second guide rollers 121 and 122 are formed of bearings, the inner ring is fixed to the rotation shafts 121a and 122a and the outer ring is in contact with the first and second guide surfaces 111 and 112, respectively, so that the outer ring is the inner ring. To freely rotate by the ball.

The operation of the guide device of the linear actuator according to the present invention will be described.

When the mover 220 performs linear motion from the stator 230 in the body 210, the roller units 120 provided on both sides of the mover 220 are provided on both sides of the body 210. It is guided to move along, thereby allowing the mover 220 to perform a linear motion while maintaining a gap from the stator 230.

In particular, since the roller unit 120 provided forward and backward on both sides of the movable member 220 has the first and second guide rollers 121 and 122 radially bound, the movable member 220 has the first and second guide surfaces ( 111 and 112 to be stably supported in various directions, and precise linear motion guide is performed.

In addition, it does not require a complicated linear motion guide unit that requires a lot of space for installation, thereby reducing the time, effort and manufacturing cost of the assembly, further contributing to the compactness of the product .

As described above, the present invention has been described with reference to the accompanying drawings, but various modifications and changes can be made without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the following claims.

110: guide portion 111: first guide surface
112: second guide surface 120: roller unit
121: first guide roller 121a: rotating shaft
122: second guide roller 122a: rotating shaft
200: linear actuator 210: body
220: mover 230: stator

Claims (4)

In the device for guiding the mover installed in the body of the linear actuator,
A plurality of guide parts formed on both side surfaces of the body along a longitudinal direction, each of the first and second guide surfaces inclined in opposite directions; And
A plurality of roller units each provided on both sides of the mover, each of which comprises first and second guide rollers installed to be in contact with each of the first and second guide surfaces.
Guide device for a linear actuator comprising a.
The method of claim 1, wherein the guide portion,
And said first and second guide surfaces comprise grooves having a V-shaped cross-sectional shape.
The method of claim 2,
The guide portion intersects the first and second guide surfaces to be perpendicular to each other,
The roller unit is a guide device of the linear actuator, characterized in that the first and second guide rollers are radially bound by the rotating shaft at the edge of the mover.
According to claim 1 or 3, wherein the roller unit,
The guide device of the linear actuator, characterized in that the first and second guide rollers are made of a bearing.

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