KR200443758Y1 - Motion guide device - Google Patents

Abstract

The present invention relates to a motion guide device, in particular, comprising a track consisting of a track rail or track axis, a movable block slidable along the track, and an oilless bearing located between the track and the movable block and coupled to the movable block. It relates to a motion guide device characterized in that.

This makes it simpler and less expensive than the guide devices of linear motion systems, which typically consist of ball bushings or crawler rolling elements (balls), provides smooth and quiet linear motion, and operates without lubrication. There is no need to generate dust, it is possible to operate in a high temperature or corrosive environment, and to prevent catastrophic failure.

Motion, guide, oilless bearing

Description

Motion guide device {

1 is a view showing a perspective view of an embodiment of a motion guide device of the present invention.

2 is a view showing a perspective view of another embodiment of a motion guide device of the present invention.

3 is a front view of a configuration further including a bushing in the motion guide device of the present invention shown in FIG. 2 and a cross-sectional view of a bushing and an oilless bearing applied thereto.

FIG. 4 is a front view of a portion of the motion guide device of the present invention, in which the track shaft is separated, and a cross-sectional view of the bushing and oilless bearing applied thereto.

5 is a view showing a front view of another embodiment of a motion guide device of the present invention.

Figure 6 is a view showing a front view of two embodiments provided with a groove in the motion guide device of the present invention.

7 is a view showing a front view of two embodiments having a groove and a protrusion between the motion guide device of the present invention.

8 is a cross-sectional view of two embodiments of another type of oilless bearing applied to a motion guide device of the present invention.

Explanation of symbols on the main parts of the drawings

10: track 10a: track rail

10b: Orbital axis 20: Moving block

22: coupling portion 23: connection groove

24: through hole 26: housing

30: oilless bearing 40: bushing

42: groove for snap ring coupling 50: groove

60: interlude

The present invention relates to a motion guide device, and more specifically, it is simpler and cheaper to configure than a guide device of a linear motion system, which is generally composed of a ball bushing or a crawler rolling element (ball), and is smooth and quiet linearly. It is possible to obtain motion, and it is operated without lubricating oil, so there is no need for sealing, less dust is generated, it can be operated in high temperature or corrosive environment, and it is possible to obtain the effect to prevent catastrophic failure. It is about.

In general, a motion guide device is generally applied to a linear linear motion system (LM system) or a circular motion system, and consists of a track and a carriage that slides along it. . In order to smoothly move the carriage, generally, a cloud element including a ball or the like is continuously disposed on the carriage or continuously connected through a retainer to continuously rotate in a caterpillar form.

However, many of these rolling element continuum and the endless track consisting of them have a lot of components, making it difficult to manufacture, there is a problem that the manufacturing cost is high, and during use, it must continue to supply lubricating oil to manage it, supply of oil As a result, there is a difficulty in adding a sealing member to prevent the leakage of oil. In addition, if there is such a cloud element, the cloud element must continue to rotate in accordance with the movement of the carriage, there is a problem that noise and dust occurs, and catastrophic failure occurs when the oil supply is not properly performed There is a problem.

Therefore, there is an urgent need to develop a LM guide or a guide device for the LM system that does not include such cloud elements and facilitates the movement of the carriage.

As to solve the problems of the prior art as described above, the present invention can be produced simply and inexpensively without a ball or other rolling elements and sealing structure, to obtain a smooth and quiet linear motion, it is operated without lubricating oil, It aims to provide a motion guide device that generates less dust, can operate in high temperature or corrosive environments, and prevents catastrophic failures.

The present invention for realizing the above object

A track consisting of a track rail or track axis;

A movable block slidable along the trajectory; And,

It provides a motion guide device characterized in that it comprises an oilless bearing located between the track and the moving block coupled to the moving block.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a motion guide device, a track (10) consisting of a track rail (10a) or a track shaft (10b), a movable block (20) slidable along the track (10), and moving with the track (10) It is configured to include an oilless bearing 30 located between the blocks 20 and coupled to the moving block 20.

The track 10 is a track applied to a well-known motion guide device. For example, the track 10 is a track applied to an LM system or a track applied to a turning motion system having a curved movement section rather than a straight line. Examples may correspond to the track rail 10a as shown in FIG. 1 or the track shaft 10b as shown in FIG. 2.

The moving block 20 as shown in Figs. 1 to 2 is coupled to the track so that the slide moves along the guide of the track. The moving block 20 can be applied to a variety of shapes that can be moved in combination with a known track, for example, a track rail or a track shaft, specific examples thereof are as shown in FIGS. 1 to 5, This includes a guide (pillow) block showing an example in FIGS. 2 to 3, some open guide blocks showing an example in FIG. 4, an axial support type guide block showing an example in FIG. For example, the slide carriage which shows the example is mentioned.

In addition, the motion guide of the present invention is located between the track 10 and the moving block 20 in order to facilitate the relative movement between the moving block and the track such as an oilless bearing ( 30). The oilless bearing does not mean an oilless bearing in agreement that no oil (lubricating oil) is used at all, and does not have a rolling element including a ball or the like as in a conventional LM system, but such a rolling element. A wide range of oilless bearings (lubricated bearings) that include all bearings without bearings, specific examples of which include a bronze sintered body or wire mesh formed on a base of metal or resin, and filled with a solid lubricant. Can be.

In addition, in particular, when the track 10 is a track shaft (10b), further comprises a bushing 40 between the moving block 20 and the oilless bearing 30, the oilless bearing 30 It may be configured in the form of coupling to the inner peripheral surface of the bushing (40). Through this, manufacturing can be made easier, and specific examples thereof include the configurations of FIGS. 3 to 4. In the case of the movable block having such a bushing may further include a snap ring coupling groove 42 as shown in FIGS. 3 to 4 in order to prevent the separation of the combined bushing, and various combinations are possible. To add a flange configuration as shown in FIG. 4 to one or both ends of the bushing, to form a thread, to form a groove for snap ring engagement, or to combine them, The other side may form a structure, such as formed with nasan acid.

Specific examples of such a moving block 20 may be a guide block as shown in FIGS. 2 to 3 when the motion is a linear motion and the track is an orbital axis. That is, in this case, the movable block 20 has a coupling part 22 on one side of the outer side and a housing 26 having a through hole 24 having an axis in a direction perpendicular to the one surface, and the through hole 24. ) May have a configuration in which only the oilless bearing 30 alone or the bushing including the oilless bearing 30. 2 illustrates a case where only the oilless bearing 30 is provided in the through hole 24 alone, and FIG. 3 illustrates a case in which the bushing including the oilless bearing 30 is included in the through hole 24. .

At this time, the through hole 24, the bushing 40 and the oilless bearing 30 may be configured in the form of an open arc shape, a part of which is cut off at the same portion, an example thereof is as shown in FIG. .

In the case where the motion is a linear motion and the track is a track axis, another specific example of the moving block 20 may be an axial support type guide block, as shown in FIG. 5. That is, in this case, the moving block 20 has a coupling part 22 on one side of the outer side and a housing 26 having a through hole 24 having an axis in a direction perpendicular to the one side and spaced apart from the one surface, The through hole 24 may have a configuration in which the oilless bearing 30 or the bushing 40 including the oilless bearing 30 is provided. 4 illustrates a case where the through hole 24 has a bushing including the oilless bearing 30.

In addition, a specific example of the moving block 20 for the case where the motion is a linear motion and the track is a track rail may include a slide carriage moving relative to the track rail. A specific example thereof is as shown in FIG. 1. That is, the movable block 20 in this case has a housing 26 having a coupling portion 22 on the outer side and a connecting groove 23 having an axis in a direction parallel to the one surface, and the connecting groove. 23 may be constituted by a slide carriage moving relative to the track rail 10a having the oilless bearing 30 between the contact portions with the rail 10a. 1 illustrates a case where only the oilless bearing 30 is provided in the through hole 24 alone.

In addition, such an oilless bearing 30 may be formed in all portions in which the track and the moving block contact as shown in FIG. 4, but preferably as shown in FIG. 3. The oilless bearing 30 is preferably separated from both ends of the moving block 20 based on its moving direction. In this case, when a large load is applied or a sudden increase in load (load) occurs and elastic deformation of a rail or a block occurs, such elastic deformation easily occurs at the non-contacting portion and thus absorbs such deformation. Damage due to such deformation can be reduced.

Also preferably, as shown in the specific embodiments in Figure 6, the contact surface between the assembly consisting of the oilless bearing 30 and the moving block 20 and the track 10 has a groove parallel to the direction of movement to the assembly or It may be configured to further include in the track (10). That is, in the case of applying the oilless bearing, the contact between the moving block and the track is made into surface contact, and the airtight (by the oil film-contained in the bearing) is made as compared with the configuration including the rolling element. In addition, since such airtightness may impede movement, in the case of the above-described grooves to prevent this, airtightness or film formation can be reduced. As shown in the drawing, the groove may be provided on the side of the moving block or on the track side, and the shape thereof may be applied to various known shapes. As a specific example of this, in addition to the quadrangle as shown, a groove having a cross section of a triangular, semi-circular, semi-oval, or other polygon may be formed, and in addition, the corner portion of the groove section formed as described above may be rounded. In addition to the number or arrangement of the four or two symmetrically arranged as shown, in addition to determining the number, relative position, symmetry, etc. can be applied according to the site, if necessary, the depth of the groove (radius) Direction) up to a portion of the lubrication-free bearing, up to the lubrication-free bearing (as shown), through the lubrication-free bearing, and up to a portion of the moving block, can be configured at various depths as necessary.

In addition to this, as shown in the embodiments of FIG. 7, the track 10 or assembly further includes a linear protrusion 60 that fits into the groove 50 on the surface thereof and is continuous in the movement section. The coupling portion of the groove 50 and the protrusion 60 may be combined with i) the open portion as shown in the right side of FIG. 7 or the left side of FIG. 7. As one may be configured in the form of ii) combined without an open portion.

Through this, the moving block can be prevented from rotating or swinging from side to side with respect to the track, thereby enabling smooth movement. The protrusions are continuously formed along the axis in the case of FIG. 7, and the cross-sectional shape thereof is formed according to the shape of the various grooves as described above, and as shown on the left side of FIG. As shown in the right side of Figure 7 may be configured so as to maintain the groove to prevent air tightness as described above completely configured. In addition, although not shown, the contact portion between the side surface or the upper surface and the groove between the protrusions may be configured to further include an oilless bearing on the contact surface.

Finally, the oilless bearing as shown in FIG. 8 (which represents the case of a plate bearing rather than a circular bearing for convenience of illustration) as another embodiment of preventing the airtight described above to facilitate movement. 30 may be configured as a concave-convex structure having a plurality of protrusions on the surface corresponding to the contact surface with the raceway 10. As shown, the base surface (moving block or bushing) of the oilless bearing may be present in addition to the protrusion, and the oilless bearing itself may be configured to form only the protrusion. In this way, since the protrusions do not have the same function as the groove 50, the smooth movement can be performed.

As described above, according to the motion guide device of the present invention, a general LM guide or a guide device applied to the LM system has a ball or other rolling element and sealing structure, whereas the motion guide device of the present invention has such a configuration. It can be manufactured simply and inexpensively because it does not have a rolling motion, and can get smooth and quiet linear motion or turning motion because it does not generate rolling motion, and it is easy to manage because it is operated without lubricating oil. It is easy to apply to the required workplaces, it can be applied to high temperature environment and underwater environment where lubricating oil supply or operation is not free, and it can operate in the corrosion environment where corrosion of cloud elements such as balls can occur. To prevent catastrophic failures The effect can be achieved that.

In addition, in the case of the ball bushing, there is a problem in that the rotation of the shaft is not easy because only the linear motion of the shaft is guided. However, in the case of the present design, the linear motion as well as the linear motion can be simultaneously performed.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and those skilled in the art can be variously modified without departing from the spirit and scope of the present invention described in the utility model registration claims below. Modifications and variations are also included within the scope of the present invention.

Claims (10)

delete delete delete delete delete A track consisting of a track rail or track axis; A movable block slidable along the trajectory; And, A motion guide device comprising an oilless bearing positioned between the track and the moving block and coupled to the moving block. The motion is a linear motion, The track is a track rail, The moving block includes a housing having a coupling portion on the outer surface of the housing having a connecting groove having an axis in a direction parallel to the one surface, and the connecting groove having an oilless bearing between the contact portion with the rail. Motion guide device, characterized in that the slide carriage to move relative to. A track consisting of a track rail or track axis; A movable block slidable along the trajectory; And, A motion guide device comprising an oilless bearing positioned between the track and the moving block and coupled to the moving block. The oilless bearing is separated into a front end and a rear end along the moving direction of the moving block in the moving block, characterized in that coupled to each. A track consisting of a track rail or track axis; A movable block slidable along the trajectory; And, A motion guide device comprising an oilless bearing positioned between the track and the moving block and coupled to the moving block. The contact surface between the moving block assembly consisting of the oilless bearing and the moving block and the track further comprises a groove parallel to the moving direction in the moving block assembly or track. The method of claim 8, The motion guide device, characterized in that the moving block assembly having the groove or the opposite side of the track further includes a linear protrusion between the groove and continuous in the moving section. delete

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