JPH0337879Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dustproof device for a sliding part, particularly a sliding part that has a telescope type dustproof cover between the track base and the bearing body.

Conventionally, when linear sliding bearings are used in locations where dirt, moisture, foreign matter, etc. are likely to adhere, a bellows made of acid- and weather-resistant material is used between the track and the bearing body.

In addition, dirt, moisture,
Some devices are known that are equipped with a metal cover (telescope type) to prevent foreign objects from entering.

However, since the bellows of a machine tool has a rectangular shape and has a folded structure, if foreign objects such as dirt and chips (lubricating oil) fall and accumulate during the folding process, the bearing body cannot return correctly. , it is necessary to inspect before the end of work or the start of work.

Also, the frictional resistance when sliding between the telescope type side plate and the guide surface is large (because it is metal), causing the side plate to ``sag''. "Sliding resistance" increases. (It moves forward, undulating like a snake.) At the same time, the noise from sliding and the sound of objects colliding with each other increases. (Refer to Japanese Utility Model Application Publication No. 57-140942) The technical problem of this invention is to prevent dust, moisture, foreign matter, etc. from adhering to the sliding surface, that is, the track base, and to prevent noise generation during the reciprocating movement of the bearing body. It's about doing.

The structure of the present invention, that is, the technical means for solving the above technical problem is as follows.

In a dustproof device for a sliding part that includes a plurality of covers with different diameters and a guide plate at one end of the cover, a downward flange and an upward flange are provided at the front and rear ends of the first cover having different diameters, and the front and rear ends of the second cover are provided with a downward flange and an upward flange at the front and rear ends of the second cover. A downward flange and an upward flange are formed at the front and rear ends of the downward flange, the upward flange, and the third cover, and a filler is attached to the inside of the downward flange of the second and third covers, and the first cover A first guide plate made of engineering plastic is attached to the outside of the upward flange of the second cover, and a guide plate made of engineering plastic is attached to the outside of the upward flange of the second cover, and the inner periphery of the first guide plate made of engineering plastic is attached. The surface has a cylindrical shape that is substantially the same as the inner circumferential surface of the second cover, and the outer circumferential surface of the second guide plate made of engineering plastic also has a cylindrical shape that is substantially the same as the inner circumferential surface of the third cover, Furthermore, the inner circumferential guide surfaces of these first and second guide plates include a horizontal surface that approximately matches the outer circumferential shape of the upper flat surface, left and right side walls, and left and right skirt portions of the track base, and a left and right guide surface and a left and right sliding surface that are integrally formed. A dustproof device for a sliding part is characterized by the following:

The above technical means provides the following effects.

Since a filler is attached to the front or rear of the flange formed at the front and rear ends of covers with different diameters, when the cover is moved forward or backward, the inner surface of the flange and the outer circumferential surface of the next cover are in contact with each other. This is useful for preventing noise.

In addition, an engineering plastic guide plate is attached to the substantially lower surface of the other flange to which no filler is attached, and since the plate has low frictional resistance, it has a sliding function that allows each cover to move smoothly forward and backward. It turns out.

In addition, each cover has a substantially cylindrical shape with concentric circles, and the lower opening end is maintained in contact with the inclined surface of the track base, so that falling dust, moisture, and foreign matter can be prevented from entering. In addition, there is no possibility of foreign matter entering from below, and lubricants such as oil can be easily retained.

Moreover, since the shape is cylindrical, press molding is easy.

An embodiment of the present invention will be described below based on the drawings.

Reference numerals 10, 11, and 12 denote first, second, and third covers having concentric substantially cylindrical shapes. A flange 14 is formed, and tapered open ends 15 and 16 are formed below the first cover 10, which move forward or backward while slidingly contacting the outer peripheral surface of the first cover 10.

The second cover 11 is formed to have a larger diameter than the first cover 10, and the first cover 11 is formed at the front and rear ends of the second cover 11.
Similarly, a downward flange 17 and a downward flange 18 are formed, and move forward or backward while slidingly contacting the outer peripheral surface of the second cover 11.

The third cover 12 is formed with a downward flange 19 and an upward flange 20 like the second cover 11, and open ends 23, 24, 25, 26 are formed below the second cover and the third cover like the first cover. .

Fillers 21 and 22 made of a plastic material such as an engineering plastic material are installed inside the downward flanges 17 and 19 of the second cover 11 and the third cover 12.

At the rear ends of the first cover 10 and the second cover 11, annular first and second guide plates 27 and 28 made of a plastic material such as engineering plastic material are attached, respectively.

The inner peripheral guide surface of the first guide plate 27 is connected to the upper flat surface 30 of the track base 29 and the left and right side walls 31, 3.
A horizontal surface 35, left and right guide surfaces 36, 37, and left and right sliding surfaces 38, 39 corresponding to the first and second skirt portions 33, 34 are formed.
Step portions 40 are formed corresponding to the upward flanges 14, 18 of the covers 10, 11.

In the drawing, reference numeral 41 indicates an extension rail 46 extending from the end plate 42.
43 is the bearing body, 44 is the retainer, 45 is the ball, and 46 is the extension rail. Since the track base 29, that is, the rail is long, it is difficult to tap the end surface 47, so it is not connected. It is something that

Since the device of the present invention is constructed as described above, first, the front downward flange 13 of the first cover 10 is fixed to the front surface of the extension rail 46 by means such as soldering, and the third cover 10 is
The upward flange 20 is attached to the front surface of the bearing body 43 via a pushing member 48 and bolts 49.

Therefore, as the bearing body 43 retreats, the filler material 22 of the third cover 12 also retreats.
Since the second cover 11 slides into contact with the outer circumferential surface of the second cover 11 and retreats, it slides smoothly and can prevent abnormal noise from occurring.

Next, the front surface of the bearing body 43 moves backward while pressing the second guide plate 28, and the second guide plate 28 moves backward.
The cover 11 is also smoothly retreated like the third cover and stopped at a predetermined position. (See FIG. 4) Next, when the bearing main body 43 moves forward, the third cover and the second cover sequentially move forward in the opposite direction to that described above.

As described above, when the bearing body moves forward or backward, the third cover 12 and the second cover 11
The engineering plastic guide plates 27 and 28 attached to the outer circumference of the third cover 1
2 and the second cover 11, and is formed to slide on the entire upper flat surface, left and right side walls, and left and right skirts of the track base 29, so it is strong and supports the third cover and the second cover 11. 2. The cover can always slide smoothly and in a stable state.

Although a single bearing main body and a track base have been described as an implementation mode, generally the track bases 29, 29 are attached to the upper left and right sides of the bed (not shown) of a machine tool, industrial machine, etc., and a table ( Bearing body 43, 4 attached to the lower part of (not shown)
Use with 3 inserted.

In addition, there is a sliding third part where the filling material is installed.
Although the downward flanges of the cover and the second cover are described, the present invention is not limited thereto;
It is also possible to jointly attach the first cover and the second cover to the upward flanges.

Furthermore, the number of covers is not limited to three, and can be increased or decreased depending on the size of the mating mechanical device, and there will be no difference in operation and effect.

[Brief explanation of the drawing]

Figure 1A is a front view showing the device of the present invention installed on the bearing body and track base, and Figure 1B is the
Figure 2 is a right side view of Figure 1A with the bearing body removed, Figure 3A is a front view of the guide plate, and Figure 3A is a side view showing the third cover installed. is a sectional view taken along the line A-A in Fig. 3A, Fig. 4 is a sectional view showing the overlapping state of the covers, and Fig. 5 is a sectional view taken along the line A-A in Fig.
The figure is a front view of the bearing body, and FIG. 6 is a partially sectional side view of the bearing body. 10, 11, 12...Cover, 13-20...
Flange, 21, 22...Filler, 27, 28...
…Guide plate.

Claims (1)

[Scope of utility model registration request] In a dustproof device for a sliding part, which includes a plurality of covers 10, 11, 12 having different diameters and guide plates 27, 28 at one end of the covers, a downward flange 13 is provided at the front and rear ends of the first cover 10 having different diameters. Upward flange 14, second cover 11
A downward flange 17, an upward flange 18, and a downward flange 19 and an upward flange 20 are formed at the front and rear ends of the third cover 12, and the downward flanges 17, 19 of the second and third covers 11, 12 are formed. A first guide plate 27 made of engineering plastic is installed on the outside of the upward flange 14 of the first cover 10, and a first guide plate 27 made of engineering plastic is installed on the outside of the upward flange 18 of the second cover 11. Engineering plastic guide plate 2
Moreover, the inner circumferential surface of the first guide plate 27 made of engineering plastic has a cylindrical shape that is substantially the same as the inner circumferential surface of the second cover 11, and the second guide plate 28 made of engineering plastic also has a cylindrical shape. The outer circumferential surface also has a cylindrical shape that is substantially the same as the inner circumferential surface of the third cover 13, and the inner circumferential guide surfaces of the first and second guide plates 27 and 28 made of engineering plastic are similar to the inner circumferential surface of the track base 29. It is noted that the upper flat surface 30, the left and right side walls 31, 32, and the horizontal surface 35 that substantially matches the outer peripheral shapes of the left and right skirt portions 33, 34, the left and right guide surfaces 36, 37, and the left and right sliding surfaces 38, 39 are integrally formed. Features a dustproof device for sliding parts.