KR20130127238A

KR20130127238A - Linear motion guide

Info

Publication number: KR20130127238A
Application number: KR1020120051015A
Authority: KR
Inventors: 최종갑; 박용균
Original assignee: 주식회사 에스엠이씨
Priority date: 2012-05-14
Filing date: 2012-05-14
Publication date: 2013-11-22

Abstract

The present invention relates to a linear motion guide (20) connecting a vertical frame (30) with a transfer table, which is placed to be separated from the vertical frame (30) at a certain distance, being placed in a space between the vertical frame (30) and the transfer table, and having a structure for absorbing the thermal expansion of balls placed inside. The linear motion guide (20) includes: rails (22) being placed at the sides of the transfer table and being mutually separated on the vertical frame (30) at a certain distance; linear motion blocks (24) being respectively coupled to the rails (22) and being linearly moved along the rails (22); and connecting frames (26) being respectively coupled to the linear motion blocks (24) and being fixed to the transfer table, wherein the linear motion blocks (24) connecting the connecting frame (26) and the rains (22) are placed in the stacking direction of the vertical frame so that load concentration on the balls, which are placed inside the linear motion blocks (24), by thermal deformation is buffered even if the thermal expansion of the balls is generated by heat.

Description

LM Guide {Linear Motion Guide}

The present invention relates to an LM guide, and more particularly, to an LM guide which minimizes interference in a constraint direction of a frame and a thermal expansion direction of a ball.

As is well known, Linear Motion Guide is a means to linearly reciprocate the conveyer by installing it on the bottom of the conveyer having a flat plate shape, and moving lightly without clearance, making it easy to drive and positioning. High precision, high rigidity in all directions, large allowable load, long-term high accuracy, high speed, and other advantages. The general configuration of such an LM guide will be described in detail as follows. .

1 is a partial cutaway perspective view showing a general LM guide, Figure 2 is an exemplary view installed the LM guide according to the prior art.

The L guide is composed of an L block (1) is installed on the bottom surface of the transfer table, and the rail (2) for the L block (1) to ride.

Here, the L block 1 is installed in series at the center of the rail 2 and is coupled to a lead screw (not shown) that rotates with the power of a motor and moves on the rail 2 according to the rotation operation of the lead screw. By doing so, the transfer table 3 placed on the upper end is transferred to the front and the rear.

As illustrated in FIG. 2, the LM Guide for linearly moving the transfer table 3 on which the robot is installed in the vertical direction is disposed vertically on the vertical frame 4 and left and right sides of the vertical frame 4, respectively. A rail (2) and an EL block (1) coupled to each of the rails (2) and transported along the rail (2), each of which is fixed to a carriage (3).

Here, each rail 2 has a plurality of EL blocks (1) are arranged, a connecting frame (6) is installed to fix the plurality of EL blocks (1) to the conveying table (3), the connecting frame ( 6) is fixed to the conveyance (3).

By the way, in the conventional LG guide structure when the ball 5 is generated by the heat generated by the friction during operation, the ball (5) inside the L block 1 is connected to the frame 6 and the transfer table (3) Because of the strong restraint force of the vertical frame (4) is pressed because there is a problem that can not withstand deformation due to thermal expansion and break.

An object of the present invention is to provide an LM guide that minimizes interference in the constraint direction of the frame and the thermal expansion direction of the ball.

In addition, the present invention provides a structure that minimizes interference in the direction of the thermal expansion of the ball while at the same time can easily separate the object to be transported, reduce the width of the device and facilitate the wiring process even if such a structural deformation The purpose is to provide an LM guide.

One side of the present invention in the L guide 20 to connect the vertical frame 30 and the transfer table spaced at a predetermined interval, the LM guide 20 is the space between the vertical frame 30 and the carriage A structure that can buffer the thermal expansion of the ball disposed in the interior, the plurality of rails disposed on the side of the conveying table in the vertical frame 30, spaced apart from the vertical frame 30 by a predetermined interval, respectively (22); An EL block 24 coupled to each of the rails 22 through a ball and linearly moved along the rails 22, and having a force due to thermal expansion of the balls in a vertical direction of the rails 22; It is coupled to each of the L block 24 and provides an LM guide including a connecting frame 26 fixed to the carriage so that the restraining force is generated only in the direction perpendicular to the thermal expansion direction of the ball.

Here, two L-blocks 24 may be disposed along each of the rails 22.

In the LM guide 20 according to the present invention, since the L block 24 connecting the connecting frame 26 and the rail 22 is disposed in the stacking direction of the conveyer and the vertical frame, thermal expansion occurs in the ball by heat. There is an effect to buffer the concentration of the load due to heat deformation in the ball disposed inside the EL block 24.

In addition, it is possible to easily separate the object to be transported 10, reduce the width of the device and even if such a structural deformation can be easily processed wiring, even if the structural deformation is difficult, such as a clean room application device There is.

1 is a partial cutaway perspective view showing a typical LM guide
Figure 2 is an exemplary view installed by the EL guide according to the prior art
Figure 3 is a perspective view of the work robot is installed L guide according to an embodiment of the present invention
Fig. 4 is a front view of Fig. 3
FIG. 5 is a right side view of FIG. 3
6 is a plan view of FIG.
7 is a front view of the LM guide shown in FIG.
8 is a side view of FIG. 7
9 is an enlarged view of FIG. 5.
10 is an enlarged cross-sectional view of the LM guide of FIG.

FIG. 3 is a perspective view of a working robot in which an EL guide is installed according to an embodiment of the present invention. FIG. 4 is a front view of FIG. 3, FIG. 5 is a right side view of FIG. 3, and FIG. 6 is a plan view of FIG. 3. 7 is a front view of the LM guide shown in FIG. 3, FIG. 8 is a side view of FIG. 7, FIG. 9 is an enlarged view of FIG. 5, and FIG. 10 is an enlarged sectional view of the LM guide of FIG. 6.

As shown, the LM guide according to the present embodiment is a device for vertically moving the high load robot 10 in the vertical direction. In this case, the LM guide 20 is installed in the vertical frame 30 standing in the vertical direction, the robot 10 is disposed in front of the vertical frame 30, the LM guide 20 is the robot 10 ) And the vertical frame 30.

The LM guide 20 has a rail 22 fixed to one surface of the vertical frame 30, an L block 24 coupled to the rail 22, and a connection frame fixed to the L block 24. And a connection frame 26, and the connection frame 26 is fixed to the robot 10.

In this case, the LM guide 20 including the rail 22, the LM block 24, and the connection frame 26 is disposed at predetermined intervals on both sides of the front surface of the vertical frame 30, respectively. ) Is fixed to the robot 10 at the same time.

Here, the L block 24 is coupled to the rail 22 and the connecting frame 26 in the front and rear direction, even though the ball inside the L block 24 expands due to heat generated during operation. The force for restraining the L block 24 is weak to buffer the expansion of the ball. The restraint force on the L block 24 is generated by the configuration in which the connecting frame 26 to which the L block 24 is connected is connected to a transport table such as a robot. The restraining force occurs only in a direction perpendicular to the direction of expansion of the ball.

Accordingly, the connection frame 26 is constrained only in the transverse direction by the robot 10 and does not press the ball in the front and rear directions.

That is, the direction constraining the connecting frame 26 and the arrangement direction of the EL block 24 on which the ball is disposed are arranged to cross each other to have a structure capable of buffering thermal expansion of the ball. Expressed differently, the expansion direction due to thermal expansion of the ball is the same as the arrow of FIG. 10, but the L block 24 is not constrained to the direction other than the rail 22. It is not so large that breakage of the thermally expanded ball is prevented.

Meanwhile, a driving device such as a lead screw (not shown) is disposed inside the vertical frame 30, and the driving device and the robot 10 are connected through a driving block 28 to connect the robot 10 to the rail. You can move along (22).

In this way, since the LM guide 20 is configured on the front surface instead of the side of the vertical frame 30, the robot 10 coupled to the L block 24 is located on the front of the vertical frame 30 in the same manner. In addition to the case of the side L-m guide 20 of the removal is not only easier, but also does not require an additional structure for fixing the side can reduce the weight.

In addition, in the present embodiment has been described as an example that the LM guide 20 is fixed to the vertical frame 30, otherwise may be installed in a horizontal frame, the robot 10 and the vertical frame 30, which is a transfer table In the relative arrangement relationship between the LM guide 20 has a more important meaning.

On the other hand, in the case of the LM guide applied to the clean room, since the area of the LM guide 20, which is an operation part which is likely to generate dust, should be sealed, a cable connected to the robot 10 that is constrained and transported by the L block 24. If the L guide is configured on the side of the vertical frame 30, there is no problem in the cable processing because the side of the vertical frame belongs to the sealed area, but the front type L guide 20 as in the embodiment of the present invention Cabling may not be easy. In consideration of this, in the embodiment of the present invention by utilizing the space between the robot block 10 and the elm block 24 configured between the vertical frame 30, by placing such a cable (not shown) effective cable while maintaining the sealing Allow for deployment.

Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited to the embodiments and drawings described herein, and is applied by those skilled in the art through various combinations within the scope of the technical spirit of the present invention. This is possible.

10: Robot 20: LM Guide
22: rail 24: L block
26: connecting frame 28: drive block
30: vertical frame

Claims

In the LM guide 20 to connect the vertical frame 30 and the transport table disposed to be spaced apart a predetermined interval,
The LM guide 20 is a structure that can buffer the thermal expansion of the ball disposed in the space disposed between the vertical frame 30 and the transfer table,
A plurality of rails 22 disposed on the side of the transfer table in the vertical frame 30 and spaced apart from the vertical frame 30 by a predetermined interval;
An EL block 24 coupled to each of the rails 22 through a ball and linearly moved along the rails 22, and having a force due to thermal expansion of the balls in a vertical direction of the rails 22;
The LM guide coupled to each of the EL blocks (24) and comprises a connecting frame (26) fixed to the carriage so that the restraining force is generated only in the direction perpendicular to the thermal expansion direction of the ball.

The method according to claim 1,
The L block 24 is a plurality of L guide is disposed along the rail (22).

The method according to claim 2,
LM guide between the LM block (24) is provided with a space for the additional structure including a cable.