TWI772918B - Linear guideway and dust-proof assembly thereof - Google Patents

Abstract

A linear guideway and a dust-proof assembly thereof are disclosed. The dust-proof assembly includes two dust-proof sheets, each including a first section with opposite first and second ends, and a second section with opposite first and second ends. The second end of the first section connects to the first end of the second section, and the first and second sections form a groove. The second section further includes at least one positioning portion configured to be locked to the linear guideway together with the first end of the first section so that the relative movement of the dust-proof sheet and linear guideway is limited.

Description

Linear slides and their dust-proof components

The invention relates to a dust-proof technology, in particular to a linear slide rail and a dust-proof assembly thereof.

The dust-proof assembly of the existing linear slide rail is shown in Figure 1, which is mainly composed of two dust-proof sheets A2. When assembling the dust-proof sheet A2 on the linear slide rail, first place one end of each dust-proof sheet A2 into the groove A13 formed between the end cover bottom surface A11 and the end cover side surface A12 of the end cover A1, and then The other ends of the two dustproof sheets A2 are pressed into the direction of the bottom surface A11 of the end cover, so that the toothed structures on the other ends of the two dustproof sheets A2 abut against each other. However, since the toothed structures of the two dustproof sheets A2 only abut and overlap with each other, when the dustproof sheets A2 are in contact with the slide rail, they are easily collapsed due to force. In addition, since the dustproof sheet A2 is not fixed in the radial direction of the slide rail, part of the dustproof sheet A2 is easily drawn between the slide rail and the slider, resulting in abnormal resistance of the linear slide rail.

Therefore, the main purpose of the present invention is to provide a linear slide rail and its dust-proof assembly, so as to avoid abnormal resistance caused by the dust-proof elements in some of the dust-proof assemblies falling between the slider and the slide rail.

According to an embodiment of the present invention, a dust-proof assembly for a linear slide rail is provided. The linear slide rail includes a slide rail and a slider slidably mounted on the slide rail. The dust-proof assembly includes: two dust-proof sheets, each of the dust-proof pieces. The sheet includes a first section and a second section, the first section includes a first end and a second end opposite the first end, the second section includes a first end and relative to the first end A second end of the first end, the second end of the first section is connected to the first end of the second section, the first section and the second section form a groove, the first section The two sections further include at least one positioning portion, and the at least one positioning portion and the first end of the first section are used to be fixed on the linear slide rail to limit the relative displacement of the dust-proof sheet and the linear slide rail.

According to an embodiment of the present invention, a linear slide rail is provided, which includes: a slider including a first accommodating space; two end caps, respectively disposed on opposite sides of the slider, each of the end caps The bottom surface of the end cap and the side surfaces of the two end caps form a second accommodating space, the second accommodating space communicates with the first accommodating space, and the bottom surface of the end cap A first limiting portion is included, and each side surface of the end cover includes at least a second limiting portion; a slide rail is used to pass through the first accommodating space and the second accommodating space; and the above-mentioned A dustproof assembly, the two dustproof sheets are used to be disposed in the first accommodating space and the second accommodating space separately along a central axis of the linear slide rail, and the first section of each of the dustproof sheets The first end is used for abutting against the first limiting portion of the bottom surface of the end cover, and the at least one positioning portion of the second section of each dust-proof sheet corresponds to the at least one second portion of the side surface of the end cover respectively. The limiting portion is used for engaging with the at least one second limiting portion, and the shape of the positioning portion matches the corresponding second limiting portion.

Therefore, the linear slide rail and its dustproof assembly provided by the present invention can limit the displacement of the dustproof sheet by setting the first end of the first section of the dustproof sheet and the positioning part of the second section to avoid partial dustproofing The abnormal resistance caused by the piece falling between the slider and the slide rail occurs.

In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, one of ordinary skill in the art will understand that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures and/or elements have not been described in detail so as not to obscure the present invention.

Referring to FIGS. 2 to 7 , a linear slide rail provided by an embodiment of the present invention mainly includes a slider 10 , two end covers 20 , a slide rail 30 and two oil scrapers 40 . The slider 10 includes a first accommodating space H1. The end caps 20 are respectively located at opposite ends of the slider 10 along the central axis P of the linear slide rail. Each end cap 20 includes one end cap bottom surface 21 and two opposite end cap side surfaces 22, the two end cap side surfaces 22 are respectively located on opposite sides of the end cap bottom surface 21, and the end cap bottom surface 21 and the two end cap side surfaces 22 form A second accommodating space H2 that can communicate with the first accommodating space H1. The two oil scrapers 40 are respectively disposed on the two end covers 20 . Each oil scraper 40 includes a third accommodating space H3 that can communicate with the first accommodating space H1 and the corresponding second accommodating space H2. Therefore, the slide rail 30 can pass through the first accommodating space H1 of the slider 10 , the second accommodating space H2 of the end caps 20 and the third accommodating space H3 of the two oil scrapers 40 along the central axis P.

The linear slide rail of this embodiment further includes a dustproof component, and the dustproof component includes two identical dustproof sheets 50 disposed between the slider 10 and the slide rail 30 . The dustproof sheet 50 can be a strip-shaped structure of equal cross-sectional area made by, for example, plastic injection molding, so as to reduce the manufacturing cost and avoid the deformation of the injection molding during manufacturing. Each dust sheet 50 includes a first section 51 and a second section 52 . The first section 51 includes a first end 511 and a second end 512 opposite to the first end 511 , and the second section 52 includes a first end 521 and a second end 522 opposite to the first end 521 . The second end 512 of the first section 51 is connected to the first end 521 of the second section 52 . The first end 511 of the first section 51 is used to be fixed to the end cover 20 of the linear slide rail to limit the relative displacement of the dustproof sheet 50 and the linear slide rail.

The first section 51 and the second section 52 can match the shape of the end cover side surface 22 of the end cover 20 to form a groove R1, and the groove R1 is used for accommodating the top of the slide rail 30, as shown in FIG. 5 . . Specifically, the first section 51 extends along a first axis D1 and is in the shape of a flat plate, and at least a part of the second section 52 extends along a second axis D2. The first axis D1 and the second axis D2 are substantially perpendicular to the central axis P of the linear slide rail, and the first axis D1 is not flat to the second axis D2, for example, the first axis D1 is substantially perpendicular to the second axis D2.

The second section 52 further includes at least one positioning portion 523 , and the positioning portion 523 is used to be fixed to the end cover 20 of the linear slide rail to limit the relative displacement of the dustproof sheet 50 and the linear slide rail. In the embodiment of FIG. 5 , the second section 52 includes two positioning portions 523 . The two positioning portions 523 are respectively located at the first end 521 and the second end 522 of the second section 52 .

In addition, the end cap 20 includes two first limiting portions 211 on the bottom surface 21 of the end cap, and the two first limiting portions 211 may be symmetrically arranged. The end cap 20 includes at least one second limiting portion 221 on each end cap side surface 22 , wherein the second limiting portion 221 on one end cap side surface 22 and the second limiting portion 22 on the other end cap side surface 22 The portion 221 may be in a symmetrical configuration. The first limiting portion 211 can be protruded from the bottom surface 21 of the end cap. The first limiting portion 211 may include, for example, a support section 2111 extending along the first axis D1 and an extension section 2112 extending along the second axis D2. The support section 2111 and the extension section 2112 form a groove H1, but the present invention does not Not limited to this. The quantity, shape and position of the second limiting portion 221 can be designed according to the quantity, shape and position of the positioning portion 523 on the dustproof sheet 50 . 6, when the number of positioning portions 523 on the dustproof sheet 50 is two, the positioning portions 523 are recessed by the dustproof sheet 50 on the outer surface 54 of the second section 52, and the positioning portions 523 are respectively When located at the first end 521 and the second end 522 of the second section 52, the number of the second limiting portions 221 on the side surface 22 of the end cover is also two, and the second limiting portion 221 is formed by the side surface of the end cover. 22 is protruding, and the position of the second limiting portion 221 on the side surface 22 of the end cover corresponds to the position of the positioning portion 523 on the second section 52 when the dustproof sheet 50 is inserted into the end cover 20 .

The dustproof assembly can be assembled to the linear slide rail after the end cover 20 is assembled to the slider 10 . When installing the dustproof assembly on the linear slide rail, as shown in FIGS. 3 and 6 , two dustproof sheets 50 can be placed in the first accommodating space H1 and the second accommodating space H2 along the central axis P of the linear slide rail. In addition, the two dustproof sheets 50 are disposed apart from each other and are fixed to the end covers 20 . In detail, the second section 52 of the dustproof sheet 50 can be firstly supported against the side surface 22 of the end cover along the second axis D2, and the second section 52 of the dustproof sheet 50 and the side surface of the end cover 20 can be 22 The positioning portion 523 on the second section 52 and the second limiting portion 221 on the side surface 22 of the end cover are mutually positioned. For example, the positioning portion 523 and the second limiting portion 221 are engaged with each other to limit the second section. The relative displacement of 52 and the end cap side surface 22 along the first axis D1. Next, press the first end 511 of the first section 51 of the dustproof sheet 50 into the groove H1 of the first limiting portion 211 along the first axis D1, so that the first end 511 of the first section 51 abuts against the The first limiting portion 211 of the bottom surface 21 of the end cap. Specifically, the end surface of the first end 511 of the first section 51 abuts against the support section 2111 of the first limiting portion 211 , and is located inside the first end 511 of the first section 51 relative to the outer surface 54 . The surface 55 contacts the extending section 2112 of the first limiting portion 211 , so that the first end 511 of the first section 51 is supported by the first limiting portion 211 . Thereby, the relative displacement of the first section 51 and the bottom surface 21 of the end cap along the first axis D1 and the second axis D2 is restricted. In this way, the dislocation of the dust-proof sheet during the operation of the linear slide rail can be avoided, thereby preventing the occurrence of dust-proof failure and the increase of the resistance of the linear slide rail caused by a part of the dust-proof sheet falling between the slide rail and the slider.

When the two dustproof sheets 50 are fixed to the end cover 20, the opposite ends of each dustproof sheet 50 along the central axis P are respectively abutted against the two oil scraping members 40, as shown in FIG. 7, and the two dustproof sheets 50 are on the linear slide rail. can be arranged symmetrically, as shown in Figure 4. In FIG. 7 , the oil scraper 40 is disposed inside the end cover 20 . After the end cover 20 is assembled to the slider 10 , the oil scraper 40 cannot be visually observed.

In order to more easily fix the first end 511 of the first segment 51 to the first limiting portion 211 of the bottom surface 21 of the end cover, in this embodiment or other embodiments, the extension portion of the first limiting portion 211 may be A chamfer 212 is set on the 2112, as shown in FIG. 6 .

In this embodiment or other embodiments, each dustproof sheet 50 may further include a third section 53 connected to the second end 522 of the second section 52 . The second section 52 and the third section 53 can match the shape of the end cover side surface 22 of the end cover 20 to form a groove R2, as shown in FIG. 5 . In detail, the third section 53 extends along the first axis D1 from the second section 52 and can contact the slide rail 30 . Since the relative displacement of the dust-proof sheet 50 and the end cover 20 is limited, the relative position of the third section 53 and the slide rail 30 is kept fixed. Therefore, when the third section 53 contacts the slide rail 30, it can not only improve the performance of the linear slide rail The degree of sealing can ensure the dustproof effect, and can also avoid the abnormal resistance of the linear slide rail caused by falling between the slider 10 and the slide rail 30 when it is deformed by force.

Although the above embodiment is described by taking the example of FIG. 5 where the first section 51 of the dustproof sheet 50 is flat and the first end 521 and the second end 522 of the second section 52 are respectively provided with a positioning portion 523 , this The invention is not limited to this. The following examples illustrate other implementation aspects.

Referring to FIG. 8 , a dustproof assembly provided by another embodiment of the present invention includes two dustproof sheets 60 . The dust sheet 60 may be installed on the end cap 20 shown in FIG. 5 . The dustproof sheet 60 is similar to the dustproof sheet 50 shown in FIG. 5 . However, a curved portion 613 may be further included between the first end 611 and the second end 612 of the first section 61 of the dustproof sheet 60 . Thereby, the first end 611 of the first section 61 is more easily fixed to the first limiting portion 211 of the end cover 20 , and even abuts against the first limiting portion 211 .

Alternatively, please refer to FIG. 9 , a dustproof assembly provided by the present invention according to still another embodiment includes two dustproof sheets 70 . The dustproof sheet 70 includes a first section 71 and a second section 72 . The first section 71 and the second section 72 form a groove R3. The first section 71 is similar to the first section 61 in FIG. 8 , so the related description of the first section 71 can refer to the related description of the first section 61 , and details are not repeated here. At least a portion of the second section 72 extends along the second axis D2. The second section 72 includes a positioning portion 723 . The positioning portion 723 can be formed by being recessed on the outer surface 76 of the second section 72 and located between the first end 721 and the second end 722 of the second section 72 .

In order to correspond to the setting of the positioning portion 723 of the second section 72 of the dustproof sheet 70 , a second limiting portion 821 may be protruded on the side surface 82 of the end cover 80 , so that the positioning portion 723 of the dustproof sheet 70 and the second limiting portion 821 can be protruded. The limiting portions 821 are positioned with each other, such as engaging with each other, so as to limit the mutual displacement of the second section 72 of the dustproof sheet 70 and the end cover side surface 82 of the end cover 80 along the second axis D2.

In this embodiment or other embodiments, the dustproof sheet 70 may further include a third section 73 . The third section 73 connects the second section 72 , which is located between the first section 71 and the third section 73 . The second section 72 and the third section 73 may match the shape of the end cap side surface 82 of the end cap 80 to form a groove R4. Thereby, the sealing degree of the linear slide rail can be improved.

In this embodiment or other embodiments, the dustproof sheet 70 may further include a fourth section 74 . The fourth section 74 connects the third section 73 , which is located between the second section 72 and the fourth section 74 . The third section 73 and the fourth section 74 can match the shape of the end cap side surface 82 of the end cap 80 to form a groove R5. Thereby, the sealing degree of the linear slide rail can be improved.

In this embodiment or other embodiments, the first end 721 of the second section 72 of the dustproof sheet 70 may be configured as an extended section 724 . One of opposite ends of the extending section 724 is connected to the first section 71 , and the other is the second section 72 . The extension section 724 and the first section 71 form a groove R31 , and the rest of the extension section 724 and the second section 72 form another groove 32 .

Although the above embodiments are described by taking the oil scraper 40 disposed inside the end cover 20 in FIG. 7 as an example, the present invention is not limited to this example; in other embodiments, as shown in FIG. 10 , the oil scraper 40 ′ can be disposed outside the end cap 20 ′ and on the side of the end cap 20 ′ away from the slider 10 . Therefore, after the end cover 20' is assembled to the slider 10, the oil scraper 40' can still be visually observed.

Although in the above embodiments, the positioning portion is described as an example in which the positioning portion is recessed in the second section, the present invention is not limited to this example, as long as the positioning portion on the dustproof sheet has a shape that can match the shape of the corresponding side surface of the end cover. The shape of the corresponding second limiting portion can be matched. For example, at least one of the positioning portions is convexly disposed on the second section, and the corresponding second limiting portion is concavely disposed on the side surface of the end cover.

Although the present invention is disclosed in the foregoing embodiments, these embodiments are not intended to limit the present invention. Changes, modifications, and combinations of implementations made without departing from the spirit and scope of the present invention all belong to the scope of patent protection of the present invention. For the protection scope defined by the present invention, please refer to the attached patent application scope.

10: Slider 20, 20’, 80: end caps 21: Bottom surface of end cap 211: The first limit part of the bottom surface of the end cap 2111: The support section of the first limit part 2112: The extension of the first limit part 22,82: End cap side surface 221,821: The second limit part 30: Slide rail 40,40': oil scraper 50, 60, 70: Dust sheet 51, 61, 71: First section of dust sheet 511, 611: First end of first segment 512,612: Second end of first segment 52, 72: Second section of dust sheet 521,721: First end of second segment 522,722: Second end of second segment 523,723: Positioning part of the second section 53,73: The third section of the dust sheet 613,713: Bend of first section 724: Extension segment 74: The fourth section of the dust sheet 54,76: Outer surface of dust sheet 55: The inner surface of the dust-proof sheet A1: End cap A11: Bottom of end cap A12: End cap side surface A13: Groove A2: Dust-proof sheet D1: The first axis D2: Second axis H1: The first accommodation space H2: The second accommodation space H3: The third accommodation space P: the central axis of the linear slide R1, R2, R3, R31, R32, R4, R5, H1: groove

Other aspects of the invention and its advantages will be discovered after studying the detailed description in conjunction with the following drawings: Fig. 1 is the schematic diagram of the dustproof assembly of the existing linear slide rail; 2 is a schematic view of the appearance of a linear slide rail according to an embodiment of the present invention; 3 is an exploded schematic view of the linear slide rail in FIG. 2 drawn according to an embodiment; 4 is a side view of the linear slide rail after removing the metal scraper of the end cover according to an embodiment of the present invention, so as to present the configuration relationship of the end cover, the dust-proof assembly, the slider and the slide rail; 5 is a partial enlarged view of the linear slide rail of FIG. 4 drawn according to an embodiment of the present invention; 6 is a schematic diagram of installing a dust-proof assembly on a linear slide rail according to an embodiment of the present invention; 7 is a partial enlarged view of a cross-sectional view of the linear slide rail taken along the section line 7-7 of FIG. 2 according to an embodiment of the present invention, for showing that the dustproof component installed in the linear slide rail abuts against the oil scraper , and the oil scraper is arranged inside the end cover; 8 is a partial enlarged view of the linear slide rail of FIG. 4 drawn according to another embodiment of the present invention, which is used to present a schematic diagram of installing another dust-proof component on the linear slide rail; FIG. 9 is a partial enlarged view of the linear slide rail of FIG. 4 drawn according to still another embodiment of the present invention, which is used to present a schematic diagram of another type of dust-proof assembly located in another type of linear slide rail; and 10 is a partial enlarged view of a cross-sectional view of the linear slide rail taken along the section line 7-7 of FIG. 2 according to another embodiment of the present invention, for showing that the dustproof component installed in the linear slide rail is against the oil scraping The oil scraper is arranged outside the end cover.

10: Slider

20: End cap

30: Slide rail

50: Dustproof sheet

Claims (10)

A dust-proof assembly for a linear slide rail, the linear slide rail has a slide rail and a slider slidably arranged on the slide rail, and the dust-proof assembly comprises: Two dustproof sheets are arranged between the slide rail and the slider, each of the dustproof sheets includes a first section and a second section connected to the first section, the first section includes a first section end and a second end opposite to the first end, the second section includes a first end and a second end opposite to the first end, the second end of the first section is connected to the first end The first end of the two sections, the first section and the second section form a groove for accommodating the top of the slide rail, the second section further includes at least one positioning portion, the at least one positioning The first end of the first section and the first section are used to be fixed to the sliding block to limit the relative displacement of the dustproof sheet and the sliding block. The dustproof assembly of claim 1, wherein the first section extends along a first axis, and at least a portion of the second section extends along a second axis, the first axis being non-planar with respect to the second axis. The dustproof assembly of claim 1, wherein the at least one positioning portion of the dustproof sheet is located between the first end and the second end of the second section. The dustproof assembly according to claim 1, wherein the number of the at least one positioning portion of the dustproof sheet is plural, and the positioning portions are respectively located at the first end and the second end of the second section. The dustproof assembly of claim 1, wherein the first section further includes a curved portion. The dustproof assembly according to claim 1, wherein at least one of the positioning portions is recessed in the second section. The dustproof assembly according to claim 1, wherein at least one of the positioning portions is protruded from the second section. The dustproof assembly according to claim 1, wherein each of the dustproof sheets further comprises a third section connected to the second end of the second section, the second section and the third section form another concave groove. A linear slide that includes: a slider, including a first accommodating space; Two end caps are arranged on opposite sides of the slider, each of the end caps includes a bottom surface of one end cap and two opposite side surfaces of the end caps, the bottom surface of the end cap and the side surfaces of the two end caps form a second an accommodating space, the second accommodating space communicates with the first accommodating space, the bottom surface of the end cover includes a first limiting portion, and each side surface of the end cover includes at least one second limiting portion; a slide rail for passing through the first accommodating space and the second accommodating space; and The dustproof assembly according to any one of claims 1 to 8, wherein the two dustproof sheets are arranged in the first accommodating space and the second accommodating space along a central axis of the linear slide rail, each of the The first end of the first section of the dust-proof sheet is used for abutting against the first limiting portion on the bottom surface of the end cover, and the at least one positioning portion of the second section of each dust-proof sheet is respectively engaged with The at least one second limiting portion on the side surface of the end cap. The linear slide rail as claimed in claim 9, further comprising two oil scrapers, respectively disposed on the two end covers, each of the dust-proof sheets abutting against the two oil scrapers at opposite ends along the central axis, respectively .

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