Linear guide rail

Abstract

The utility model discloses a linear guide rail which comprises a guide rail, a sliding block and two reverse covers, the sliding block is connected with the guide rail in a sliding mode, the two reverse covers are connected with the two ends of the sliding block respectively, and a side face sealing piece is arranged between the lower portion of the sliding block and the guide rail. The guide rail is provided with at least one groove, and the side, close to the guide rail, of the side face sealing piece is provided with a second sealing lip part. A part of the second sealing lip part is located in the groove, and a bent gap is formed between the second sealing lip part and the surface of the groove. The non-contact sealing mode is adopted between the side face sealing piece and the guide rail, the running resistance of the sliding block can be reduced, and abrasion and dust generation of the sealing lip part caused by contact friction can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of guide rails, in particular to a linear guide rail. Background Art

[0002] Linear guides generally include: rails, sliders and reverse covers. In order to prevent external dust or foreign matter from entering the slider and affecting its operation, end face sealing gaskets are generally provided on the end faces of the sliders and side sealing strips are provided under the sliders.

[0003] The disadvantages of the existing end face seal are: in order to achieve the sealing effect, the end face seal gasket and the track are interference fit, and there are grooves on both sides of the track, and a part of the end face seal gasket is stuck in the groove. When installing or removing the end face seal gasket, the end face seal gasket needs to slide on the track for a distance before installation or removal, and the length of the track is generally long, which makes installation / removal inconvenient. In addition, after the end face seal gasket slides for a long distance, it is easy to cause wear, resulting in poor subsequent sealing effect.

[0004] The defects of the existing side seal are: the side seal gasket and the track are in interference contact seal. As the sliding time of the slider increases, the side seal strip rubs back and forth with the metal track, which will cause the side seal strip to wear. Frictional heat will also accelerate the aging of the side seal strip, reducing the sealing effect. In addition, the side contact seal will also increase the running resistance of the slider when it moves, resulting in reduced running efficiency. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the utility model provides a linear guide rail, in which the side seals adopt non-contact sealing, which can increase the service life of the side seals and improve the operating efficiency of the slider; the end face seals can be removed from directly above the guide rail or from the left and right directions.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a linear guide rail, comprising: a guide rail, a slider, and two reverse covers, wherein the slider is slidably connected to the guide rail, the two reverse covers are respectively connected to the two ends of the slider, and a side seal is provided between the lower side of the slider and the guide rail; wherein at least one groove is provided on the guide rail, and a second sealing lip is provided on a side of the side seal close to the guide rail; a part of the second sealing lip is located in the groove, and a curved gap is formed between the second sealing lip and the surface of the groove.

[0007] Furthermore, an end face seal is provided on a side of the reverse cover away from the slider.

[0008] Furthermore, a deformation groove is provided at the upper end of the end face seal.

[0009] Furthermore, the end face seal is a left-right split structure.

[0010] Furthermore, a first sealing lip is provided on a side of the end face sealing member close to the reverse cover, and the first sealing lip extends in the direction where the reverse cover is located.

[0011] Furthermore, the groove is in an arc shape, a rectangle shape, or a U shape.

[0012] Furthermore, the end face seal comprises: an elastic steel sheet and a rubber layer, the rubber layer is fixedly connected to the elastic steel sheet, and the rubber layer is fixedly connected to the first sealing lip.

[0013] Furthermore, force applying parts are provided on the left and right sides of the end face seal.

[0014] The beneficial effects of the utility model are:

[0015] The utility model adopts a non-contact sealing method between the side seal and the guide rail, which can not only reduce the running resistance of the slider, but also avoid the wear and dust generation of the sealing lip caused by contact friction.

[0016] The end face sealing member of the utility model adopts a convenient disassembly structure, and during assembly or replacement, the end face sealing member can be taken out without sliding it to the end of the guide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is an exploded schematic diagram of the linear guide rail of the utility model.

[0019] Figure 2 It is a schematic diagram of the end face of the linear guide rail of the utility model.

[0020] Figure 3 This is a first schematic diagram of the groove of the utility model.

[0021] Figure 4 This is a second schematic diagram of the groove of the utility model.

[0022] Figure 5 It is a third schematic diagram of the groove of the utility model.

[0023] Figure 6 It is a schematic diagram of the deformation groove of the utility model.

[0024] Figure 7 It is a schematic diagram of the end face sealing member of the utility model being taken out upward.

[0025] Figure 8It is a structural schematic diagram of the split end face seal of the utility model.

[0026] In the figure: 1, guide rail; 2, slider; 3, reverse cover; 4, end face seal; 5, side seal; 11, groove; 41, deformation groove; 42, first sealing lip; 43, elastic steel sheet; 44, rubber layer; 431, force applying part; 51, second sealing lip. DETAILED DESCRIPTION

[0027] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0028] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 8 As shown, the linear guide rail of the utility model comprises: a guide rail 1, a slider 2, and two reverse covers 3. The slider 2 is slidably connected to the guide rail 1, and the two reverse covers 3 are respectively connected to the two ends of the slider 2. A circulating ball path is formed between the guide rail 1, the slider 2, and the reverse covers 3. A plurality of steel balls are arranged in the circulating ball path to realize the movement of the slider 2. Among them, an end face seal 4 is arranged on the side of the reverse cover 3 away from the slider 2, and a side seal 5 is arranged between the slider 2 and the guide rail 1 below.

[0031] Specifically, a second sealing lip 51 is provided on the side of the side seal 5 close to the guide rail 1. At least one groove 11 is provided on the guide rail 1, a part of the second sealing lip 51 is located in the groove 11, and a curved gap is formed between the second sealing lip 51 and the surface of the groove 11. The shape of the groove 11 is arc-shaped, rectangular, or U-shaped. The shape of the second sealing lip 51 matches the shape of the groove 11. In other words, the second sealing lip 51 of the utility model is not an interference fit with the guide rail 1, but a non-contact fit. The curved gap formed can prevent external foreign matter from entering the interior of the slider, thereby playing a dustproof sealing role. Since the second sealing lip 51 does not contact the guide rail 1, it can also reduce the running resistance of the slider, thereby improving the running efficiency of the slider.

[0032] Specifically, the end face seal 4 includes: an elastic steel sheet 43 and a rubber layer 44, and the rubber layer 44 is fixedly connected to the elastic steel sheet 43. The end face seal 4 is connected to the reverse cover 3 by screws. A first sealing lip 42 is provided on the side of the end face seal 4 close to the reverse cover 3, and the first sealing lip 42 extends in the direction where the reverse cover 3 is located. The rubber layer 44 is fixedly connected to the first sealing lip 42. In other words, the first sealing lip 42 is an inward protrusion type, and a matching inclined groove is provided on the reverse cover 3. When the end face seal 4 and the reverse cover 3 are assembled, there is no outward protrusion structure in the overall appearance, which can not only improve the sealing effect, but also improve the aesthetics.

[0033] In one embodiment, a deformation groove 41 is provided at the upper end of the end face seal 4. Force-applying parts 431 are provided on the left and right sides of the end face seal 4. The deformation groove 41 is located at the upper end of the elastic steel sheet 43, and the force-applying parts 431 are located on the left and right sides of the elastic steel sheet 43 near the upper end. When an external force F acts on the force-applying parts 431, the opening distance of the deformation groove 41 gradually decreases, so that the opening distance of the lower end of the end face seal 4 increases. When the opening distance of the lower end is greater than the maximum width of the guide rail 1, the end face seal 4 can be taken out upwards or inserted downwards. When the external force F is removed, the end face seal 4 can return to its original state, and the first sealing lip 42 can fit tightly with the guide rail 1 to achieve sealing. Since the deformation groove 41 is provided on the elastic steel sheet 43, when the first sealing lip 42 is worn after long-term use, the deformation groove 41 enables the elastic steel sheet 43 to self-deform, thereby compensating for the wear of the first sealing lip 42, so that the first sealing lip 42 is always in close contact with the guide rail 1.

[0034] In another embodiment, the end face seal 4 is a left-right split structure. The split structures can be connected by plugging, snapping, etc. The left-right split end face seal 4 can be installed and removed from the left and right directions of the guide rail 1.

[0035] In summary, the linear guide rail of the utility model has the following advantages through structural improvement:

[0036] (1) The side seal is changed to a non-contact, curved gap design. In addition to the sealing effect, it also reduces the running resistance of the slider, avoids the wear and damage of the rubber lip due to friction, and extends the service life. At the same time, it also avoids the fluctuation of running resistance caused by aging of the lip and other problems, ensuring the overall running stability.

[0037] (2) The end face seal 4 can be installed / disassembled from directly above the guide rail 1 or from the left and right directions, which solves the problem that the end seal must be slid to the end of the rail for disassembly, saves the customer's installation space, and improves assembly efficiency. At the same time, the design of the deformation groove 41 allows the first sealing lip 42 to maintain a certain fit with the guide rail 1, and even when the rubber lip is worn, it can achieve automatic compensation, thereby ensuring the overall sealing effect.

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A linear guide rail, characterized in that: include: A guide rail (1), a slider (2), and two reverse covers (3), wherein the slider (2) is slidably connected to the guide rail (1), the two reverse covers (3) are respectively connected to two ends of the slider (2), and a side seal (5) is provided between the lower side of the slider (2) and the guide rail (1); wherein at least one groove (11) is provided on the guide rail (1), and a second sealing lip (51) is provided on a side of the side seal (5) close to the guide rail (1); a portion of the second sealing lip (51) is located in the groove (11), and a curved gap is formed between the second sealing lip (51) and the surface of the groove (11).

2. The linear guide rail according to claim 1, characterized in that: An end face seal (4) is provided on the side of the reverse cover (3) away from the slider (2).

3. The linear guide rail according to claim 2, characterized in that: A deformation groove (41) is formed at the upper end of the end face sealing component (4).

4. The linear guide rail according to claim 2, characterized in that: The end face seal (4) is a left-right split structure.

5. The linear guide rail according to claim 2, characterized in that: A first sealing lip (42) is provided on a side of the end face sealing component (4) close to the reverse cover (3), and the first sealing lip (42) extends in the direction where the reverse cover (3) is located.

6. The linear guide rail according to claim 1, characterized in that: The groove (11) is in the shape of an arc, a rectangle or a U.

7. The linear guide rail according to claim 5, characterized in that: The end face seal (4) comprises: an elastic steel sheet (43) and a rubber layer (44), wherein the rubber layer (44) is fixedly connected to the elastic steel sheet (43), and the rubber layer (44) is fixedly connected to the first sealing lip (42).

8. The linear guide rail according to claim 3, characterized in that: The end face sealing component (4) is provided with force applying portions (431) on the left and right sides.

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