Screw-free miniature guide rail

Abstract

The utility model relates to the technical field of guide rails, in particular to a screw-free miniature guide rail which comprises a sliding block and two return covers, a plurality of first mounting holes are formed in the two ends of the sliding block, the two return covers are located at the two ends of the sliding block respectively, and a plurality of first protrusions are arranged on the end faces, close to the sliding block, of the return covers. The radius of the first protrusion is gradually reduced in the first direction, and the first protrusion is in a circular truncated cone shape. The radius of the end face, close to the sliding block, of the first protrusion is smaller than that of the first installation hole, and the radius of the end face, away from the sliding block, of the first protrusion is larger than that of the first installation hole. The sliding block and the reversing cover are in interference fit through the first installation hole and the first protrusion. Through the interference fit formed by the first mounting hole and the first bulge, the positioning and mounting between the reversing cover and the sliding block can be realized, the end surface of the sliding block does not need to be subjected to thread processing, the processing and manufacturing cost of the micro guide rail can be reduced, and meanwhile, the assembling efficiency of the micro guide rail can be improved.

Description

Technical Field

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

[0002] Micro guides are precision transmission devices used in miniaturized equipment, among other applications. Their operating principle is based on the interplay of friction and support forces. The guide rail, a flat and smooth surface, provides a stable path for the slider, which, through its steel balls, contacts the rail, achieving low-friction, high-precision linear motion. As the slider moves along the rail, the steel balls slide within the return groove between the rail and the slider, achieving a cyclic motion through a reverser, ensuring continuous and smooth sliding of the slider along the rail.

[0003] At present, the end faces of linear guides are processed with threaded holes because they need to be threadedly connected to components such as reverse covers. When the linear guide is small, the corresponding screws and threaded holes are also smaller. However, the smaller the thread, the more difficult it is to process and the higher the manufacturing cost. At the same time, the increased working hours affect the assembly efficiency of small linear guides. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the technical problems of the existing micro guide rail with threaded connection method, which is difficult to process, has high manufacturing cost and low assembly efficiency, the present invention provides a screwless micro guide rail. By improving the assembly method of the micro guide rail, the processing difficulty and manufacturing cost of the micro guide rail can be reduced, and at the same time, the assembly efficiency of the micro guide rail can be improved.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a screw-free micro guide rail, comprising: a slider and two return covers, multiple first mounting holes are provided at both ends of the slider, the two return covers are respectively located at the two ends of the slider, and multiple first protrusions are provided on the end surface of the return cover close to the slider, the radius of the first protrusion gradually decreases along the first direction, and the first protrusion is frustum-shaped; wherein: the radius of the end surface of the first protrusion close to the slider is smaller than the radius of the first mounting hole, and the radius of the end surface of the first protrusion away from the slider is larger than the radius of the first mounting hole; the slider and the return cover form an interference fit with the first protrusion through the first mounting hole.

[0006] Therefore, the positioning and installation between the return cover and the slider can be achieved through the interference fit formed by the first mounting hole and the first protrusion. Compared with the existing threaded connection method, this method has a simple structure and is easy to operate. The end face of the slider no longer needs to be threaded, which can reduce the processing and manufacturing costs of the micro guide rail. At the same time, since the number of parts of the entire screwless micro guide rail is reduced, the assembly efficiency of the micro guide rail can be improved.

[0007] Furthermore, both ends of the slider are provided with a second protrusion; both ends of the return cover are provided with a mounting groove; wherein: the mounting groove is adapted to the second protrusion.

[0008] Furthermore, it also includes: two side panels, and the side panels are connected to the return cover.

[0009] Furthermore, the two side plates are respectively located on both sides of the return cover, and a plurality of third protrusions are provided on the side of the side plate close to the return cover. The radius of the third protrusions gradually decreases along the second direction, and the third protrusions are frustum-shaped.

[0010] Furthermore, the return cover is provided with a plurality of second mounting holes on both sides thereof; wherein: the radius of the end surface of the third protrusion on the side closest to the return cover is smaller than the radius of the second mounting holes, and the radius of the end surface of the third protrusion on the side away from the return cover is larger than the radius of the second mounting holes; the return cover and the side plate form an interference fit through the second mounting holes and the third protrusions. Thus, the interference fit formed by the second mounting holes and the third protrusions enables positioning and installation of the return cover and the slider.

[0011] Furthermore, both sides of the return cover are provided with card slots, and both sides of the side plate are provided with buckles; wherein: the return cover and the side plate form a snap-fitting through the card slots and the buckles.

[0012] Furthermore, return cover grooves are provided on both sides of the return cover, and fourth protrusions are provided on both sides of the side plate; wherein: the return cover and the side plate are matched with the return cover grooves and the fourth protrusions.

[0013] Furthermore, the cross-sectional shape of the first mounting hole and the first protrusion is polygonal or circular.

[0014] Furthermore, the two side panels are both located on one side of the return cover.

[0015] Furthermore, it also includes: a plurality of steel balls, the slider is provided with a second sliding groove, and the plurality of steel balls are installed in the second sliding groove.

[0016] Furthermore, it also includes: a ball retaining wire, the return cover is provided with a groove, and the two ends of the ball retaining wire are respectively inserted into the two grooves; wherein: part of the steel balls are in contact with the ball retaining wire.

[0017] Furthermore, it also includes: a track, which is installed in the slider and abuts against the side of the ball-retaining wire away from the steel ball.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The interference fit formed by the first mounting hole and the first protrusion can achieve positioning and installation between the return cover and the slider. Compared with the existing threaded connection method, this method has a simple structure and is easy to operate. The end face of the slider no longer needs to be threaded, which can reduce the processing and manufacturing costs of the micro guide rail. At the same time, since the number of parts of the entire screwless micro guide rail is reduced, the assembly efficiency of the micro guide rail can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 Schematic diagram of the structure of the screwless micro guide rail of Example 1;

[0022] Figure 2 This is an exploded view of the screwless micro guide rail of Example 1;

[0023] Figure 3 Schematic diagram of the structure of the slider of Example 1;

[0024] Figure 4 is a side view of the slider of Example 1;

[0025] Figure 5 This is a schematic structural diagram of the return cover of Example 1;

[0026] Figure 6 This is a schematic structural diagram of the side panel of Example 1;

[0027] Figure 7 Schematic diagram of the structure of the screwless micro guide rail of Example 2;

[0028] Figure 8 This is a schematic structural diagram of the return cover of Example 2 from a first viewing angle;

[0029] Figure 9 This is a structural diagram of the return cover of Example 2 from a second viewing angle;

[0030] Figure 10 This is a schematic structural diagram of the side panel of Example 2;

[0031] Figure 11 This is a schematic structural diagram of the return cover of Example 3;

[0032] Figure 12 This is a schematic structural diagram of the side panel of Example 3;

[0033] Figure 13 This is a schematic structural diagram of the side panel of Example 4;

[0034] Figure 14 This is a schematic structural diagram of the return cover of Example 5.

[0035] In the figure: 1. Slider; 101. First mounting hole; 102. Second protrusion; 103. Second slide groove; 2. Return cover; 201. First protrusion; 202. Mounting groove; 203. Second mounting hole; 204. Clamping slot; 205. Return cover slot; 206. Groove; 3. Side panel; 301. Third protrusion; 302. Buckle; 303. Fourth protrusion; 4. Steel ball; 5. Ball retaining wire; 6. Track. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] Example 1:

[0040] like Figures 1 to 6As shown, a screwless micro guide rail includes: a slider 1 and two return covers 2, wherein a plurality of first mounting holes 101 are formed at both ends of the slider 1, and the two return covers 2 are respectively located at both ends of the slider 1. The end surface of the return cover 2 close to the slider 1 is provided with a plurality of first protrusions 201, and the radius of the first protrusion 201 gradually decreases along a first direction, and the first protrusion 201 is frustum-shaped; wherein: the radius of the end surface of the first protrusion 201 close to the slider 1 is smaller than the radius of the first mounting hole 101, and the radius of the end surface of the first protrusion 201 away from the slider 1 is larger than the radius of the first mounting hole 101; the slider 1 and the return cover 2 form an interference fit with the first protrusion 201 through the first mounting holes 101. Thus, through the interference fit formed by the first mounting hole 101 and the first protrusion 201, the positioning and installation between the return cover 2 and the slider 1 can be achieved. Compared with the existing threaded connection method, this method has a simple structure and is easy to operate. The end face of the slider 1 does not need to be threaded, which can reduce the processing and manufacturing costs of the micro guide rail. At the same time, since the number of parts of the entire screwless micro guide rail is reduced, the assembly efficiency of the micro guide rail can be improved.

[0041] Specifically, since the radius of the end face of the first protrusion 201 close to the slider 1 is smaller than the radius of the first mounting hole 101, the first protrusion 201 can easily enter the first mounting hole 101 to realize the positioning operation of the return cover 2 relative to the slider 1; the radius of the end face of the first protrusion 201 away from the slider 1 is larger than the radius of the first mounting hole 101. When a thrust is applied to the return cover 2, the two will be interference fit, so that the return cover 2 is tightly fixed on the end face of the slider 1 and is not easy to loosen.

[0042] In this embodiment, both ends of the slider 1 are provided with second protrusions 102 ; both ends of the return cover 2 are provided with mounting grooves 202 ; wherein: the mounting grooves 202 are adapted to the second protrusions 102 .

[0043] In this embodiment, the return cover 2 further comprises two side panels 3, each positioned on either side of the return cover 2. A plurality of third protrusions 301 are provided on the side of the side panel 3 proximal to the return cover 2. The radius of the third protrusions 301 gradually decreases along the second direction and is in the shape of a truncated cone. A plurality of second mounting holes 203 are provided on both sides of the return cover 2. The radius of the end surface of the third protrusion 301 proximal to the return cover 2 is smaller than the radius of the second mounting holes 203, while the radius of the end surface of the third protrusion 301 distal to the return cover 2 is larger than the radius of the second mounting holes 203. The return cover 2 and the side panels 3 form an interference fit through the second mounting holes 203 and the third protrusions 301. Thus, the interference fit formed between the second mounting holes 203 and the third protrusions 301 enables positioning and mounting of the return cover 2 and the slider 1.

[0044] Specifically, since the radius of the end face of the third protrusion 301 close to the return cover 2 is smaller than the radius of the second mounting hole 203, the third protrusion 301 can easily enter the second mounting hole 203 to realize the positioning operation of the side panel 3 relative to the return cover 2; the radius of the end face of the third protrusion 301 away from the return cover 2 is larger than the radius of the second mounting hole 203. When a thrust is applied to the side panel 3, the two will be interference fit, so that the side panel 3 is tightly fixed on the end face of the return cover 2 and is not easy to loosen.

[0045] In this embodiment, the cross-sectional shape of the second mounting hole 203 and the third protrusion 301 is circular.

[0046] In the embodiment, the track 6 further comprises: a plurality of steel balls 4, the slider 1 is provided with a second chute 103, and the plurality of steel balls 4 are all installed in the second chute 103. Specifically, during the sliding process of the track 6, the steel balls 4 roll in the second chute 103.

[0047] In this embodiment, it also includes: a ball retaining wire 5, the return cover 2 is provided with a groove 206, and the two ends of the ball retaining wire 5 are respectively inserted into the two grooves 206; wherein: part of the steel ball 4 is in contact with the ball retaining wire 5.

[0048] Specifically, the steel ball 4 is divided into two parts, the two parts of the steel ball 4 are respectively located on both sides of the track 6, and two ball retaining wires 5 are provided.

[0049] In this embodiment, the slider 1 further includes a track 6 , which is installed in the slider 1 and abuts against the side of the ball-retaining wire 5 away from the steel ball 4 .

[0050] It should be noted that the return cover 2 is a rectangular structure, including: two A surfaces, two B surfaces and two C surfaces; wherein: the first protrusion 201 and the mounting groove 202 are both arranged on the A surface close to the slider 1, and the multiple second mounting holes 203 are respectively arranged on the two B surfaces.

[0051] The assembly process of the screwless micro guide rail of the present invention is as follows: first, the return cover 2 is installed on the slider 1; then, the side plate 3 is installed on the return cover 2; then, multiple steel balls 4 are sequentially installed into the slider 1; then, the ball retaining wire 5 is installed into the return cover 2; finally, the track 6 is inserted into the slider 1, and the assembly of the entire screwless micro guide rail can be completed.

[0052] Example 2:

[0053] like Figures 7 to 10 As shown, the difference from Example 1 is that a card slot 204 is provided on both sides of the return cover 2, and a card buckle 302 is provided on both sides of the side plate 3; wherein: the return cover 2 and the side plate 3 form a card buckle fit through the card slot 204 and the card buckle 302.

[0054] Example 3:

[0055] like Figures 11 to 12 As shown, the difference from Example 1 is that return cover grooves 205 are provided on both sides of the return cover 2, and fourth protrusions 303 are provided on both sides of the side plate 3; wherein: the return cover 2 and the side plate 3 are matched with each other through the return cover grooves 205 and the fourth protrusions 303.

[0056] Example 4:

[0057] like Figure 13 As shown, the difference from embodiment 1 is that the cross-sectional shapes of the first mounting hole 101 and the first protrusion 201 are both polygonal.

[0058] Example 5:

[0059] like Figure 14 As shown, the difference from embodiment 1 is that both side panels 3 are located on one side of the return cover 2. It should be noted that the plurality of second mounting holes 203 are all opened on the C-surface close to the track 6, and both side panels 3 are on the C-surface close to the track 6.

[0060] To sum up, the present invention can achieve the positioning and installation between the return cover 2 and the slider 1 through the interference fit formed by the first mounting hole 101 and the first protrusion 201. Compared with the existing threaded connection method, this method has a simple structure and is easy to operate. The end face of the slider 1 does not need to be threaded, which can reduce the processing and manufacturing costs of the micro guide rail. At the same time, since the number of parts of the entire screwless micro guide rail is reduced, the assembly efficiency of the micro guide rail can be improved.

[0061] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A screwless micro guide rail, characterized in that: include: A slider (1), wherein both ends of the slider (1) are provided with a plurality of first mounting holes (101); Two return covers (2), the two return covers (2) are respectively located at both ends of the slider (1), and the end surfaces of the return covers (2) close to the slider (1) are provided with a plurality of first protrusions (201), the radius of the first protrusions (201) gradually decreases along the first direction, and the first protrusions (201) are in a frustum shape; The radius of the end surface of the first protrusion (201) close to the slider (1) is smaller than the radius of the first mounting hole (101), and the radius of the end surface of the first protrusion (201) away from the slider (1) is larger than the radius of the first mounting hole (101); The slider (1) and the return cover (2) form an interference fit with the first protrusion (201) through the first mounting hole (101).

2. The screwless micro guide rail according to claim 1, characterized in that: Both ends of the slider (1) are provided with second protrusions (102); Both ends of the return cover (2) are provided with mounting grooves (202); Wherein: the installation groove (202) is adapted to the second protrusion (102).

3. The screwless micro guide rail according to claim 2, characterized in that: Also includes: Two side panels (3), the side panels (3) are connected to the return cover (2).

4. The screwless micro guide rail according to claim 3, characterized in that: The two side panels (3) are respectively located on both sides of the return cover (2); the side panels (3) are provided with a third protrusion (301); and the return cover (2) is provided with a second mounting hole (203); Wherein: the return cover (2) and the side plate (3) form an interference fit with the third protrusion (301) through the second mounting hole (203).

5. The screwless micro guide rail according to claim 3, characterized in that: Both sides of the return cover (2) are provided with a card slot (204), and both sides of the side plate (3) are provided with a card buckle (302); Wherein: the return cover (2) and the side plate (3) form a snap-fitting arrangement through the snap slot (204) and the snap (302).

6. The screwless micro guide rail according to claim 3, characterized in that: Both sides of the return cover (2) are provided with return cover grooves (205), and both sides of the side plate (3) are provided with fourth protrusions (303); Wherein: the return cover (2) and the side plate (3) are matched with the fourth protrusion (303) through the return cover groove (205).

7. The screwless micro guide rail according to claim 4, characterized in that: The cross-sectional shape of the second mounting hole (203) and the third protrusion (301) is polygonal or circular.

8. The screwless micro guide rail according to claim 3, characterized in that: The two side panels (3) are both located on one side of the return cover (2).

9. The screwless micro guide rail according to claim 1, characterized in that: Also includes: A plurality of steel balls (4) are provided, the slider (1) is provided with a second slide groove (103), and the plurality of steel balls (4) are all installed in the second slide groove (103).

10. The screwless micro guide rail according to claim 9, characterized in that: Also includes: The ball retaining wire (5) is provided with grooves (206) on the return cover (2), and the two ends of the ball retaining wire (5) are respectively inserted into the two grooves (206); Part of the steel balls (4) abut against the ball retaining wire (5).

11. The screwless micro guide rail according to claim 10, characterized in that: Also includes: A track (6) is installed in the slider (1) and abuts against the side of the ball-retaining wire (5) away from the steel ball (4).

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