Sealing structure of linear guide rail

Abstract

A sealing structure of a linear guide rail comprises the linear guide rail and a sliding block arranged on the linear guide rail in a sliding mode, dustproof pieces are arranged at the two ends of the sliding block, sealing faces are arranged on the dustproof pieces, and the sealing faces are integrally attached to the linear guide rail to achieve sealing fit between the dustproof pieces and the linear guide rail. And the sealing surfaces of the dustproof sheets at the two ends are matched to seal the linear guide rail part contained in the sliding block. The sliding block sealing structure has the advantages that when the sliding block runs on the linear guide rail, the surface contact type sealing surface can effectively prevent impurities of various sizes from entering the linear guide rail part located in the sliding block, and due to the surface contact type sealing surface, the problem of sealing failure caused by abrasion after the sliding block runs for a period of time can be solved; and the surface contact type dustproof sheet is easier to scrape impurities attached to the linear guide rail in the running process of the sliding block, so that the effects of cleaning the linear guide rail and prolonging the service life of the linear guide rail are achieved.

Description

Technical Field

[0001] The utility model relates to a sealing structure, in particular to a sealing structure of a linear guide rail. Background Art

[0002] The main function of the sealing sheet on the linear guide is to prevent external dust, impurities, moisture, etc. from entering the interior of the guide, thereby protecting the guide and bearing system from contamination and corrosion. The sealing sheet can effectively reduce friction, extend the service life of the guide, and improve the operating stability and accuracy of the guide system.

[0003] Chinese patent document CN213776087U discloses a roller-type linear guide pair, including a roller slider and a slide rail, the roller slider rolls along the slide rail, the roller slider includes a slider body, a reverser assembly, a roller assembly, an end plastic cover, a dustproof sheet, a sealing sheet and an oil scraper sheet; the slider body includes a first and a second fixed cavity, a first sub-rolling groove and a second sub-rolling groove, and the roller assembly can roll along the first sub-rolling groove and the second sub-rolling groove; the reverser assembly includes a first sleeve fixed in the first fixed cavity, a second sleeve fixed in the second fixed cavity, and a first reverser and a second reverser for changing the rolling direction of the roller assembly; the roller assembly includes a plurality of rollers.

[0004] In the above scheme, the roller assembly is rolled to realize the movement of the roller slider along the slide rail, and the contact between the roller slider and the slide rail is changed from point contact to line contact, thereby increasing the contact area between the slider body and the slide rail. However, the above scheme has the following shortcomings: since there is line contact between the ball slider and the slide rail, that is, there is line contact between the dustproof sheet and the slide rail in the above scheme, after the above scheme has been running for a period of time, the dustproof sheet is easily worn and a gap is easily generated at the contact position between the dustproof sheet and the slide rail, thereby making the sealing effect of the dustproof sheet ineffective; and the line contact between the dustproof sheet and the slide rail cannot prevent larger impurities from entering the interior of the slide rail, thereby causing the problem of poor sealing effect. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sealing structure of a linear guide rail with better sealing effect.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a sealing structure of a linear guide rail, comprising a linear guide rail and a slider slidably arranged on the linear guide rail, dustproof sheets are arranged at both ends of the slider, and a sealing surface is arranged on the dustproof sheet, and the sealing surface is integrally fitted on the linear guide rail to realize the sealing cooperation between the dustproof sheet and the linear guide rail, and the sealing surfaces of the dustproof sheets at both ends cooperate to form a seal for the linear guide rail portion contained in the slider.

[0007] The beneficial effects of the utility model are as follows: by setting a sealing surface with a certain width, a surface contact can be formed between the dustproof sheet and the linear guide rail. Therefore, when the slider runs on the linear guide rail, the surface contact sealing surface can effectively prevent impurities of various sizes from entering the linear guide rail part located in the slider, and because it is a surface contact type, the sealing failure problem will not occur due to wear after running for a period of time; and the surface contact dustproof sheet can more easily scrape off impurities attached to the linear guide rail during the operation of the slider, so as to achieve the effect of cleaning the linear guide rail and extending the service life of the linear guide rail.

[0008] Furthermore, an impurity storage groove is arranged on the end surface of the dustproof sheet facing away from the slider, and the sealing surface allows impurities to fall into the impurity storage groove.

[0009] The impurity storage groove can be used to temporarily store impurities blocked by the sealing surface. When the impurities are located in the impurity storage groove, they will not move to other parts of the dustproof sheet to affect the work of the dustproof sheet; and when a certain amount of impurities accumulate in the impurity storage groove, it can be emptied by sweeping away the impurities therein, which is convenient for subsequent maintenance.

[0010] Furthermore, the impurity storage groove includes a scraping surface, and the plane where the scraping surface is located is perpendicular to the plane where the sealing surface is located; the impurity storage groove also includes a guide surface connected to the scraping surface, and the guide surface makes the impurities located thereon have a tendency to fall into the bottom of the impurity storage groove.

[0011] The scraping surface that forms a perpendicular relationship with the sealing surface makes the sealing surface have a certain thickness. When the sealing surface runs on the linear guide exposed to the side outside the slider, that is, when it runs towards the part of the linear guide where impurities may be attached, the thickness of the sealing surface can not only make the sealing surface more wear-resistant, but also further reduce the possibility of external impurities entering the part of the linear guide surrounded by the slider, thereby improving the sealing effect of the dustproof sheet. When impurities fall on the inclined guide surface, they can fall to the bottom of the impurity storage groove under the push of the impurities that fall on the scraping surface later, so as to avoid the problem of impurities accumulating on the scraping surface and causing magazine jams to affect the operation of the slider.

[0012] Furthermore, it also includes a sealing strip, and a groove is provided on the end surface of the dustproof sheet facing the slider, and the two ends of the sealing strip are respectively inserted into the groove of the dustproof sheet to fix the sealing strip.

[0013] The two ends of the sealing strip are inserted into the card groove to achieve fixation between the sealing strip and the dustproof sheet, thereby preventing the sealing strip from being manufactured at a lower limit level due to processing reasons, which would result in a gap at the joint between the dustproof sheet and the sealing strip. Therefore, the sealing strip is fixed between the two dustproof sheets to ensure that no gap is generated between the sealing strip and the dustproof sheet, so as to prevent impurities from entering the interior of the slider through the gap and affecting the operation of the slider.

[0014] Furthermore, a positioning portion is protruding from the sealing strip, a positioning hole matching the positioning portion is provided in the slot, a retractable clamping block is provided in the positioning hole, a groove for inserting the clamping block is provided on the positioning portion, and the clamping block cooperates with the groove to prevent the sealing strip from falling out of the slot.

[0015] When installing the sealing strip, the positioning portion is extended into the positioning hole and the clamping block is forced to retract, so that the positioning portion is fully extended into the positioning hole, and then the clamping block rebounds and is clamped in the groove to lock the sealing strip in the slot, further preventing the sealing strip from falling out of the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric diagram of an embodiment of the utility model;

[0017] Figure 2 This is a disassembly diagram of an embodiment of the utility model;

[0018] Figure 3 This is an axonometric view of a dustproof sheet according to an embodiment of the utility model;

[0019] Figure 4 This is a partial enlarged view of the sealing surface of the embodiment of the utility model;

[0020] Figure 5 It is a partial cross-sectional view of the card slot of an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The sealing structure of a linear guide rail according to the utility model is as follows Figure 1-5 As shown: it includes a linear guide rail 1, a sealing strip 4 and a slider 2 slidably set on the linear guide rail 1, both ends of the slider 2 are fixedly connected with dustproof sheets 3, and the dustproof sheets 3 are used to seal the linear guide rail 1 located in the inner part of the slider 2.

[0022] The dust sheet 3 is provided with a sealing surface 31 with a certain width, and a surface contact seal is formed between the sealing surface 31 and the linear guide 1. The sealing surfaces 31 of the dust sheets 3 at both ends cooperate to seal the linear guide 1 part located in the slider 2, and the impurities attached to the linear guide 1 can be scraped off through the sealing surface 31 when the slider 2 is running. The dust sheet 3 is provided with an impurity storage groove 32 on the end surface facing away from the slider 2. The impurity storage groove 32 includes a scraping surface 321 perpendicular to the plane where the sealing surface 31 is located, and the scraping surface 321 and the bottom of the impurity storage groove 32 are connected by an inclined guide surface 322.

[0023] A card slot 33 is provided on the end face of the dustproof sheet 3 facing the slider 2, a positioning hole 331 is provided in the card slot 33, and a clamping block 332 which realizes the telescopic function through an internal spring is provided in the positioning hole 331; both ends of the sealing strip 4 are provided with a positioning part 41 which is adapted to the shape of the positioning hole 331, and a groove 441 which is adapted to the shape of the clamping block 332 is provided at the center of the positioning part 41.

[0024] The following is a brief description of the installation and use process of this embodiment: when installing the sealing strip 4, the positioning parts 41 at both ends of the sealing strip 4 are inserted into the positioning holes 331, and at the same time, the pressing block 332 is forced to retract to make room for the positioning part 41 to enter. After the positioning part 41 enters the positioning hole 331, the pressing block 332 rebounds and presses in the groove 411 at the center of the positioning part 41 to lock the sealing strip 4, so as to prevent the formation of a gap between the sealing strip 4 and the dustproof sheet 3 for impurities to enter. When the slider 2 is running, the sealing surface 31 can effectively prevent external impurities from entering, and the impurity storage groove 32 can be used to temporarily store impurities to reduce the frequency of maintenance.

[0025] The above embodiment is only one of the preferred specific embodiments of the present invention. The common changes and substitutions made by those skilled in the art within the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A sealing structure for a linear guide, comprising a linear guide and a slider slidably arranged on the linear guide, wherein both ends of the slider are provided with dustproof sheets, and characterized in that: The dustproof sheet is provided with a sealing surface, which is integrally fitted on the linear guide rail to achieve sealing cooperation between the dustproof sheet and the linear guide rail, and the sealing surfaces of the dustproof sheets at both ends cooperate to form a seal for the linear guide rail portion contained in the slider.

2. The sealing structure of the linear guide rail according to claim 1, characterized in that: An impurity storage groove is arranged on the end surface of the dustproof sheet facing away from the slider, and the sealing surface allows impurities to fall into the impurity storage groove.

3. The sealing structure of the linear guide rail according to claim 2, characterized in that: The impurity storage groove includes a scraping surface, the plane where the scraping surface is located is perpendicular to the plane where the sealing surface is located; the impurity storage groove also includes a guide surface connected to the scraping surface, and the guide surface makes the impurities located thereon have a movement tendency to fall into the bottom of the impurity storage groove.

4. The sealing structure of the linear guide rail according to claim 1, characterized in that: It also includes a sealing strip. A groove is provided on the end surface of the dustproof sheet facing the slider. Both ends of the sealing strip are respectively inserted into the groove of the dustproof sheet to fix the sealing strip.

5. The sealing structure of the linear guide rail according to claim 4, characterized in that: A positioning portion is protruding from the sealing strip, a positioning hole matching the positioning portion is provided in the card slot, a retractable clamping block is provided in the positioning hole, a groove for inserting the clamping block is provided on the positioning portion, and the clamping block cooperates with the groove to prevent the sealing strip from falling out of the card slot.

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