JPH04124328U - Under seal device of linear guide device - Google Patents

Abstract

(57) [Summary] [Objective] To provide an underseal device that does not deteriorate operability due to frictional resistance and is capable of complete contact sealing. [Structure] An under seal 21 is attached to the lower end surface of the slider 2 in a linear guide device and seals the side surface of the guide rail 1, and includes an under seal main body 22 having self-lubricating properties at least on the seal end side, and the seal end thereof. The self-lubricating seal end face of the under seal body 22 and the seal lip 23L of the elastic seal body 23 are brought into contact with the side surfaces of the guide rail, thereby reducing sliding resistance. The purpose was achieved with an extremely small double contact seal.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a dustproof device for linear guide devices used in machine tools, industrial machinery, etc. This invention relates to an improvement of an under seal device.

0002

[Conventional technology]

In general, a linear guide device is a guide rail that extends long in the axial direction, as shown in Figure 4. 1, and a slider 2 movably extending over the slider 2 and having a substantially U-shaped cross section. It is growing. Ball rolling grooves 3 are formed in the axial direction on both sides of the guide rail 1. . The slider body 2A of the slider 2 is provided with a Ball rolling grooves 5 are formed opposite to the ball rolling grooves 3. Between these opposing ball rolling grooves 3 and 5, there are many rolling elements. A ball 6 is loaded so as to be able to roll freely, and the slider 2 is moved through the rolling of the ball 6. It is designed to move on the guide rail 1 in the axial direction. At this time, guide rail 1 and The ball 6 interposed between the slider 2 and the slider 2 moves in the opposite direction relative to the slider 2. to move to the end of the slider body 2A. Continuously move slider 2 in the axial direction. In order to move forward, these balls need to be circulated. So, the slider book A ball return passage 7 is further formed in the sleeve portion 4 of the body 2A, and the ball return passage 7 penetrates in the axial direction. , position the end caps 2B, which have a substantially U-shaped cross section, at both the front and rear ends of the slider body 2A. The ball return passage 7 and the ball rolling grooves 3 and 5 are connected to each other. By forming a U-shaped curved path 8, an endless ball circulation path is formed. has been done. Note that g in FIG. 4 is a grease nipple. In addition, H in FIG. 5 is A retainer that prevents the balls 6 from falling off when the slider 2 is removed from the guide rail 1 It is.

0003 By the way, the above-mentioned guide rail 1 and the slider 2 that moves astride the guide rail 1, Foreign matter such as dirt, dust, and chips may enter the gap between the balls and cause damage to the ball rolling groove surface, etc. If it adheres to the surface, the smooth rolling of the ball 6 will be hindered. Therefore, before and after slider 2 A side seal 10 that prevents foreign matter from entering through the gaps at both ends is attached to the end cap 2. It is attached to the outer end surface 2c of the slider 2, and is attached to the lower surface of the slider 2 from the gap below. The underside seals the gap between the guide rail 1 and the side surface 1b to prevent foreign matter from entering. Seal 11 is attached.

0004 An example of installing the conventional side seal 10 and under seal 11 is shown in FIG. . This figure is a perspective view of the slider 2 seen from the bottom side, and only a part of the ball 6 is shown. has been omitted. The side seal 10 has a U-shape almost similar to the end cap 2B. It has a frontal shape, and the opening is made by molding nitrile rubber onto a steel plate. A rubber seal portion 12 is formed on the inner edge of the tube. And with end cap 2B , is fixed to the end face of the slider body 2A with machine screws n, and is attached to the seal lip of the side seal 10. The upper surface 1a and the side surface 1b of the guide rail 1 are in sliding contact with each other, and the upper surface 1a and the side surface 1b of the guide rail 1 A seal is made. In addition, 16 is a grease nipple installation hole, which is attached to the end cap. It is arranged in line with the grease nipple mounting screw hole 15 provided on P2B. .

[0005] The length of the under seal 11 is approximately the same as the length of the slider body 2A, and the width is approximately the same as that of the slider body 2A. A strip-shaped steel plate or synthetic resin plate whose width is larger than the width of the lower end surface 17 of the slider body 2A. The lever is applied to the lower end surface 17 of the slider body 2A and inserted into the mounting hole 18. The bolt 20 is driven into the rivet hole 19 and fixed. Fixed underseal There is a slight gap between the seal lip L of No. 11 and the side surface 1b of the guide rail 1. The lower side of the slider 2 is sealed. Ru.

[0006]

[Problem that the idea aims to solve]

However, the under seal device of such conventional linear guide devices has Therefore, there is a gap between the seal lip L of the under seal 11 and the side surface 1b of the guide rail. have a slight gap to reduce frictional resistance, or a contact seal. In the case of slider 2, the lips are in slight contact, so the seal makes it easier for slider 2 to operate. However, the sealing performance is low and the inside of the slider 2 may not be damaged. There was a problem in that the intrusion of small dust particles could not be completely prevented.

[0007] Therefore, this idea was devised by focusing on the above-mentioned conventional problems, and it We provide an under-seal device with a complete contact structure that does not deteriorate operability due to friction. The purpose is to solve the problems of the conventional technology.

[0008]

[Means to solve the problem]

This idea consists of a guide rail with axial rolling grooves on both sides, and a guide rail for the guide rail. A rolling element rolling groove opposite to the rolling element rolling groove of the rail and a rolling element return path parallel to this. and a slider having a curved path that communicates the passage with the groove, the slider having a curved path communicating with the groove. A guide rail that can be moved through the rolling of multiple rolling elements inserted into the rolling groove of the rolling elements. The slider is attached to the lower end surface of the slider on the linear guide device straddled above. An under seal device that seals between the rider and the side of the guide rail. Therefore, the underseal device should have self-lubricating properties at least on the seal end side. an underseal body with a At the same time as the seal is attached, the seal is slightly protruded inward from the seal end of the under seal body. The elastic seal body has a seal lip, and the seal of the under seal body The end of the rail and the seal lip of the elastic seal body are brought into contact with the side surface of the guide rail. It was assumed that

[0009]

[Effect]

The seal body of the underseal device seals the guide rail through a self-lubricating coating layer. It slides in contact with the side surface, and unlike conventional seals, there is no possibility of dust entering through the seal gap. Printing Due to the self-lubricating properties of the moving surfaces, the sliding resistance is extremely small. Furthermore, the elastic material Due to its elastic force, the seal lip contacts the sealed surface on the side of the guide rail, causing double sealing. Forms a contact seal to more completely prevent dust from entering. There is a bullet in the seal lip. A constant preload is applied by force, which compensates for the wear of the sealing material. Moreover, the lip Since it is thin, its sliding resistance is extremely small.

0010

【Example】

Hereinafter, embodiments of this invention will be described with reference to the drawings. In addition, the same as before or Corresponding parts are given the same reference numerals. Figure 1 shows an example of this invention. FIG. Underseal 21 is undersea It is composed of a main body 22 and an elastic seal body 23. Under seal body 22 is a strip-shaped steel plate having approximately the same length as the slider 2 including the end cap 2B. As shown in FIG. 2, the inner edge side of the slider body 2A is made of A stepped portion 24 is formed to be long in the axial direction by being slightly bent toward the opposite side from the stepped portion 24. The edge at the tip is further raised and bent at a nearly right angle to form a sliding seal end 25. ing. The under seal main body 22 made of steel plate has a metal coating that has self-lubricating properties. Covering treatment has been applied. This treatment is performed using, for example, Kelmet (trade name), which is made of copper and lead. ) layer and lead-plated Kelmet layer, which have a low melting point and are highly malleable. It is formed at least on the seal end side, and thereby the sliding seal end 2 5 to provide self-lubricating properties.

[0011] The elastic seal body 23 is made of synthetic rubber, for example, and has a thin wall on the inner edge side of the elongated plate portion 23A. A lip 23L is provided protrudingly. Then, the thick plate portion 23A is an under seal. It is fixed to the recess on the back side of the stepped portion 24 of the main body 22 by means such as gluing or baking. Ru. The tip of the lip 23L of the elastic seal body is connected to the under seal body as shown in Figure 2. The length is such that it slightly protrudes inward by α from the sliding surface 25A of the sliding seal end 25. ing.

0012 In addition, in FIG. 1, 30 indicates the end cap 2B attached to the end surface of the slider body 2A. This is the insertion hole for the machine screw n. Also, the under seal 21 can only be fixed with rivets. A screw hole may be used instead of a screw hole, in which case 19 is a screw hole.

[0013] Next, the effect will be explained. The under seal 21 is attached as follows. Note that both sides of the slider body 2A Attach the end cap 2B to the end and assemble the slider 2 in advance. Anda -Place the seal 21 on the lower end surface 17 of the slider 2, and insert the seal 21 into the mounting hole 18. Drive the bed 20 (or screw) into the rivet hole 19 (or screw hole) ) to fix it. As shown in FIG. 3, the sliding seal end of the under seal body 22 The portion 25 slightly protrudes from the inner edge of the lower end surface 17 of the slider 2 and has a sliding surface 25A. lightly touch the side of the guide rail 1. Further inward from this sliding surface 25A is α. The protruding lip 23L of the elastic seal body 23 is elastically deformed, bent, and guided. It comes into close contact with the side surface 1b of the rail 1.

[0014] Thus, this under seal 21 is in contact with the sliding surface 25A of the under seal main body. A double contact seal is formed with the lip 23L of the elastic seal body, and the bottom of the slider 2 is Completely prevents dust from entering from any direction.

[0015] Moreover, the sliding surface 25A of the under seal body is coated with a metal coating that has self-lubricating properties. Since it has self-lubricating properties due to its mechanical properties, its sliding resistance is extremely low even with contact seals. Extremely low cost and less wear. In addition, the elastic seal body 23 also makes contact with the thin lip 23L. Because of this, the sliding resistance is also extremely small, and its elasticity allows it to follow wear. Ru.

[0016] Therefore, the dustproof performance is significantly improved compared to the conventional one, and the performance of the linear guide device is extended. It has become possible to maintain it well over a period of time. Note that in the above embodiment, the under seal 21 is attached using rivets or screws. Although the method shown here is not limited to this, there is no need to limit it to this. It can also be applied to the one-touch removable under seal proposed by Ru.

[0017] In addition, in the above embodiment, the under seal 21 is shown as a steel plate, but it is self-lubricating. It is also possible to use a flexible hard plastic. In addition, although we have described the case where balls 6 are used as rolling elements, we have also described the case where balls 6 are used as rolling elements, but it is also possible to use rollers. It can also be applied to

[0018] Also, when applied to a linear guide device having two rows of rolling element rolling grooves 5 on one side. Although we have explained this in detail, we can also apply to single-row or double-row linear guide devices. Of course, it can be applied.

[0019]

[Effect of the idea]

As explained above, according to this invention, the undercarriage in the linear guide device The sealing device is brought into contact with the side surface of the guide rail by forming a self-lubricating film on the seal end. The under-seal body is designed to fit into the body, and the under-seal body is attached to the under-seal body. Protrude slightly inward from the end of the guide rail so that it comes into contact with the side surface of the guide rail. The elastic seal body has an elastic seal lip. Therefore, the self-lubricating system A double seal is formed between the main body and the thin and highly elastic seal lip, resulting in The sealing performance is significantly improved compared to the conventional one, and the sliding resistance is extremely low, making it easy to slide. This has the effect of providing an under seal device that can maintain good operability of the device. It will be done.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a slider seen from the bottom side showing an embodiment of the invention.

FIG. 2 is a sectional view of the under seal taken along the line II-II in FIG. 1;

FIG. 3 is a sectional view illustrating a state in which the under seal shown in FIG. 1 is attached.

FIG. 4 is an overall perspective view of a linear guide device having a conventional underseal device.

5 is a sectional view taken along the line V-V in FIG. 4; FIG.

FIG. 6 is an exploded perspective view of the slider in FIG. 4, viewed from the bottom side.

[Explanation of symbols]

1 Guide rail 2 slider 3,5 Rolling element rolling groove 6 Rolling elements 7 Rolling element return passage 8 Curved road 11, 21 Under seal 22 Under seal body 23 Elastic seal body 23L seal lip

Claims (1)

[Scope of utility model registration request] Claim 1: A guide rail having axial rolling element rolling grooves on both sides, a rolling element rolling groove opposite to the rolling element rolling groove of the guide rail, a rolling element return passage parallel to this, and a rolling element return passage parallel to the rolling element rolling groove. a slider having a curved path that communicates the passage with the groove; the slider is movable on the guide rail in the axial direction through the rolling of a large number of rolling elements inserted into the rolling element rolling groove; In the under seal device which is attached to the lower end surface of the slider and seals between the slider and the side surface of the guide rail in the linear guide device which is straddled, the under seal device has a self-containing structure at least on the seal end side. It consists of an under seal body having lubricity, and an elastic seal body having a seal lip fixed in parallel to the seal end side of the under seal body and slightly protruding inward from the seal end of the under seal body,
An underseal device for a linear guide device, characterized in that the seal end of the underseal body and the seal lip of the elastic seal body are each brought into contact with a side surface of a guide rail.