Silent linear sliding rail

Abstract

The utility model discloses a silent linear slide rail, belongs to the field of linear slide rails, and aims to solve the problems that in the prior art, the production and assembly precision requirements are high, the sliding smoothness and the silent function cannot be guaranteed, and the service life is not ideal. The anti-rotation device comprises an anti-rotation rib and an end part, the head end and the tail end of the anti-rotation rib are provided with inner inclined faces, and the end part is conical. Due to the negative offset structure between the end cover rotation stopping groove and the plastic-coated rotation stopping groove, the precision requirements of production and assembly can be reduced; a guide structure at the head end and the tail end of the retaining chain can ensure the passing smoothness, the mute function and the long-time stable service life of the retaining chain; the end side rolling piece structure is arranged at the connecting part of the chain head and the chain tail, so that the uniform bearing of each row of bead grooves can be ensured, and the service life is stable.

Description

Technical Field

[0001] The utility model relates to the field of linear slide rails, and more particularly to a silent linear slide rail. Background Art

[0002] Silent linear slides are precision transmission components designed to reduce motion noise and improve operating smoothness. They are widely used in equipment requiring high-precision positioning and low-noise operation. The sliders on existing silent linear slides have a seamless fit between the end cap stop groove and the plastic-coated stop groove. This seamless fit is subject to design tolerances and production assembly errors, making the stop groove fit prone to breakage. This can cause the retaining chain stop rib to collide when passing through this fit, leading to slider jamming. The sliders on existing silent linear slides lack steel balls at the connection between the head and tail ends of the retaining chain. This lack of steel balls results in uneven load bearing across each row of bead grooves. The sliders on existing silent linear slides lack a steel ball structure, leaving the head end of the retaining chain without a guiding function, which can easily cause jamming.

[0003] Therefore, further, it can be concluded that the above-mentioned structures of the existing silent linear slide rails have the following shortcomings and deficiencies: high production and assembly precision requirements; affected by tolerances, it is very easy to produce breakage, thereby affecting the smoothness and service life of the retaining chain; the retaining chain collides and deforms to produce abnormal noise, affecting the silent function; the load on each row of bead grooves is uneven, which easily causes wear of the slider; the retaining chain has no head end steel ball guidance, affecting the smoothness. Summary of the Invention

[0004] In response to the problems mentioned in the background technology that the existing technology has high production and assembly precision requirements, the sliding smoothness and silent function cannot be guaranteed, and the service life is not ideal, the utility model provides a silent linear slide rail, which adopts a negative step structure between the end cover anti-rotation groove and the plastic-coated anti-rotation groove, which can reduce the precision requirements of production and assembly; the chain head and tail end guide structure it adopts can ensure the smooth passage, silent function and long and stable service life of the chain; the structure of the end side rolling element at the connection between the chain head and tail end can ensure that the load of each row of bead grooves is uniform and has a stable service life.

[0005] To address the aforementioned technical issues, the present invention employs the following technical solutions: a silent linear slide rail comprising: a stopper with inwardly inclined surfaces at both ends; and a tapered end member. This invention utilizes a guide structure for the chain's leading and trailing ends, ensuring smooth chain movement, a silent operation, and a long, stable service life. The end members at the leading and trailing ends of the chain connect to the end-side rolling elements at the leading and trailing ends, ensuring uniform load bearing across each row of bead grooves and a stable service life.

[0006] Preferably, the inwardly inclined surface comprises a transition section and a tip section. The tip section forms an angle α with the inner plane of the leading and trailing ends of the stop bar. The angle α is set between 10° and 35°. In this structure, the transition section refers to the curved portion of the inwardly inclined surface, while the tip section refers to the flat portion of the inwardly inclined surface. The angle between the plane of the tip section and the inner plane of the leading and trailing ends of the stop bar needs to be within an appropriate range, which has been determined through extensive experimentation.

[0007] Preferably, the anti-rotation rib is provided with an arched portion. In this design, the arched portion is provided to keep the chain anti-rotation rib close to the intermediate rolling element, leaving space for the installation of the intermediate rolling element, and the intermediate rolling element and the arched portion are provided with clearance fit.

[0008] Preferably, a section plane is provided on the inner side of the end member, that is, a section plane is provided on the position of the end member located on the inner side of the holding chain.

[0009] Preferably, the end member is provided with a first arc surface and a second arc surface at both ends. In this design, the first arc surface and the second arc surface respectively cooperate with the end side rolling member and the middle rolling member in a clearance manner, thereby limiting the movement range of the end side rolling member and the middle rolling member to a certain extent.

[0010] Preferably, end side rolling members are provided between the end parts. Maintaining the structure of end side rolling members at the connection between the chain head and tail end can ensure that the load of each row of bead grooves is uniform, thereby having a stable service life.

[0011] Preferably, the anti-rotation rib is provided on the outer side of the end member. In this structure, the anti-rotation rib is provided on the outer side of the end member to limit the rotation of the chain end member.

[0012] Preferably, the silent linear slide also includes an end cap anti-rotation groove and a plastic overmolding anti-rotation groove. The end cap and the plastic overmolding housing are connected and form an important component of the slider in the silent linear slide. The end cap anti-rotation groove is located within the end cap of the slider, and the plastic overmolding anti-rotation groove is located within the plastic overmolding housing of the slider.

[0013] Preferably, the end cap anti-rotation groove and the plastic coating anti-rotation groove have a negative step difference at the joint. The negative step difference structure between the end cap anti-rotation groove and the plastic coating anti-rotation groove can reduce the precision requirements of production and assembly.

[0014] Preferably, the silent linear guide rail further comprises an intermediate rolling member, which is arranged between the arched portions. In other words, the arched portions of the anti-rotation ribs on both sides of the intermediate rolling member surround the intermediate rolling member, further limiting its range of motion.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) the negative step difference structure between the end cover anti-rotation groove and the plastic-coated anti-rotation groove can reduce the precision requirements of production and assembly; (2) the chain head and tail end guiding structure is maintained, which can ensure the smooth passage of the chain, the silent function and the long and stable service life; (3) the structure of the end side rolling element at the connection between the chain head and tail end can ensure that the load of each row of bead grooves is uniform and has a stable service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional view of the slider of the present utility model.

[0017] Figure 2 It is a three-dimensional diagram of the retaining chain of the present utility model.

[0018] Figure 3 It is a partial front view of the retaining chain of the present utility model.

[0019] Figure 4 It is a partial left view of the retaining chain of the present utility model.

[0020] Figure 5 It is a partial cross-sectional view of the retaining chain of the present utility model.

[0021] In the figure: 1. End cover, 2. End cover anti-rotation groove, 3. Plastic-coated shell, 4. Plastic-coated anti-rotation groove, 5. End side rolling member, 6. Retaining chain, 7. Anti-rotation rib, 8. Inward inclined surface, 9. Transition section, 10. Pointed section, 11. Arched portion, 12. Spacer, 13. End member, 14. First arc surface, 15. Second arc surface, 16. Cross-sectional plane, 17. Intermediate rolling member. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0023] Example:

[0024] like Figures 1 to 5A silent linear slide shown includes an end cap 1, a plastic-coated shell 3, and a retaining chain 6. The end cap 1 and the plastic-coated shell 3 are connected in a cooperative manner and are important components of the slider in the silent linear slide. An end cap anti-rotation groove 2 is provided in the end cap 1, and the end cap anti-rotation groove 2 has an arched structure. The plastic-coated shell 3 is provided with a plastic-coated anti-rotation groove 4 arranged along the length direction of the linear slide. The anti-rotation groove can limit the rotation or tilt of the slider on the guide rail relative to the guide rail, ensuring that the slider can maintain smooth movement along a straight line on the slide rail, which can improve the rigidity and stability of the linear slide system and reduce the shaking of the slider during operation. The end cap anti-rotation groove 2 and the plastic-coated anti-rotation groove 4 are in clearance fit, together forming the return groove structure of the silent linear slide. The return groove structure can ensure that the rolling elements on the retaining chain 6 in the linear slide smoothly return to the starting position of the slider after completing the load transfer, thereby forming a closed circulation path. Backflow refers to the process in which the rolling element passes from the working surface of the slider through the surface of the guide rail and then returns to the inside of the slider. Backflow means a change in the flow direction, that is, from linear motion to lateral or oblique motion entering the backflow groove, and then back to the linear motion track. This design allows the rolling elements in the slider to be continuously recycled, ensuring the continuous and efficient operation of the linear slide system. The fitting between the end cap stop groove 2 and the plastic-coated stop groove 4 is a negative step. This negative step structure between the two can reduce the precision requirements for the production and assembly of silent linear slides, and avoid the design of the end cap stop groove 2 and the plastic-coated stop groove 4 without step difference being affected by design tolerances and production assembly errors. The fitting between the end cap stop groove 2 and the plastic-coated stop groove 4 is very prone to step difference, which causes the retaining chain 6 stop rib 7 to collide when passing through this fitting, causing the slider to jam, affecting the smoothness and service life of the retaining chain 6, while solving the problem of high production and assembly precision requirements.

[0025] The reflow groove structure composed of the end cap anti-rotation groove 2 and the plastic-coated anti-rotation groove 4 is provided with a retaining chain 6. The retaining chain 6 is used to separate the rolling elements and keep them in the appropriate position to prevent the rolling elements from being scattered or falling off in the linear slide. The retaining chain 6 can ensure that a certain distance is maintained between the rolling elements, avoid direct contact and friction between the rolling elements, ensure that the rolling elements are evenly distributed and can roll smoothly, thereby further reducing noise. The retaining chain 6 is made of a flexible material and can bend or stretch with the movement of the slider, thereby ensuring that the rolling elements are always in the optimal position. The retaining chain 6 includes a anti-rotation rib 7, an end side rolling element 5 and an end component 13 located at the end, an intermediate rolling element 17 located at the non-end, and a spacer 12. The anti-rotation rib 7 structure of the retaining chain 6 is located on both sides of the retaining chain 6. The anti-rotation rib 7 serves to fix and guide the retaining chain 6. This structure can prevent the retaining chain 6 from rotating or shifting unnecessarily during the movement of the slider, ensuring that the retaining chain 6 and the rolling element are always in the correct working position. By limiting the rotation of the retaining chain 6, the anti-rotation rib 7 structure can further improve the stability of the linear slide and reduce the noise or jamming that may be caused by the displacement of the retaining chain 6. The anti-rotation rib 7 is provided with an inwardly inclined surface 8 at the front and rear ends. The inwardly inclined surface 8 is composed of a transition section 9 and a tip section 10. The tip section 10 forms an angle α with the inner plane of the front and rear ends of the anti-rotation rib 7. The degree of the angle α is set between 10° and 35°. In this embodiment, the angle α formed by the tip section 10 and the inner plane of the front and rear ends of the anti-rotation rib 7 is designed to be 12°. In this structure, the transition section 9 refers to the arc portion of the aforementioned inclination surface 8, and the tip section 10 refers to the plane portion of the aforementioned inclination surface 8. The angle between the plane of the tip section 10 and the inner plane of the head and tail ends of the stop rib 7 needs to be within a relatively appropriate range, and this range needs to be evaluated and determined through a large number of experiments. This guiding structure of the head and tail ends of the stop rib 7 of the retaining chain 6, as well as the negative step structure design at the joint of the end cover stop groove 2 and the overmolded stop groove 4, can allow the retaining chain 6 to stably pass through the joint of the end cover stop groove 2 and the overmolded stop groove 4 when exiting the reflux groove without collision, thereby ensuring the smooth passage, silent function and long and stable service life of the retaining chain 6, thereby avoiding the retaining chain 6 colliding with the joint of the end cover stop groove 2 and the overmolded stop groove 4 when passing through the reflux groove, generating abnormal noise, thereby causing the retaining chain 6 to deform and the slider to get stuck and the silent function to fail. The anti-rotation rib 7 is provided with an arched portion 11. In this design, the arched portion 11 is arranged at a position where the anti-rotation rib 7 of the retaining chain 6 is close to the intermediate roller 17, leaving necessary space for the installation of the intermediate roller 17. In addition, a small gap is adopted between the intermediate roller 17 and the arched portion 11, so that the arched portion 11 will not have an adverse obstruction effect on the rotation of the intermediate roller 17, and at the same time the arched portion 11 can play its role appropriately.

[0026] The end member 13 in the retaining chain 6 is tapered. This tapered design facilitates the arrangement of the outer stop rib 7 with the inwardly inclined surface 8 at both ends, further facilitating the function of the stop rib 7 of the retaining chain 6 as a guiding structure. A cross-sectional plane 16 is provided on the inner side of the end member 13, that is, the cross-sectional plane 16 is provided at the inner side of the end member 13. The ends of the end member 13 are provided with a concave first arc surface 14 and a concave second arc surface 15, respectively. This design provides clearance fit between the first arc surface 14 and the end rolling element 5 and the intermediate rolling element 17, respectively, thereby limiting the range of motion of the end rolling element 5 and the intermediate rolling element 17 to a certain extent. Furthermore, the gaps between the first arc surface 14 and the end rolling element 5 and the gaps between the second arc surface 15 and the intermediate rolling element 17 are filled with an appropriate amount of lubricating liquid, which significantly facilitates smoother movement of the end rolling element 5 and the intermediate rolling element 17, reducing friction and effectively reducing noise and wear during operation of the linear slide. In the current embodiment, the end-side rolling elements 5 and the intermediate rolling elements 17 in the silent linear slide are both steel balls. Steel balls are key rolling elements in linear slides and are made of high-hardness materials, making them capable of withstanding heavy loads. During the motion of the linear slide, the steel balls roll within the anti-rotation grooves, reducing the direct contact area between the slider and the guide rail, supporting the slider while also reducing friction. The rolling motion of the steel balls has a lower coefficient of friction than sliding friction, allowing the slider to slide smoothly on the guide rail, thereby effectively reducing noise and wear in the linear slide and reducing energy loss. The end-side rolling elements 5 are disposed between the end members 13. The end-side rolling elements 5 are located at the head and tail ends of the retaining chain 6, ensuring uniform load distribution across the rows of bead grooves, thereby ensuring a stable service life for the slider. This avoids the problem of uneven load distribution across the rows of bead grooves, which can easily cause wear and tear on the slider, resulting in damage and a shortened service life, caused by the lack of steel balls at the head and tail ends of the retaining chain 6. Furthermore, this avoids the problem of the head end of the retaining chain 6 lacking a steel ball structure, which can cause the head end of the retaining chain 6 to lack a guiding function, thus easily causing jamming and affecting smooth sliding. The bead groove is the track where the steel balls roll in the linear slide. Typically, a linear slide is provided with multiple rows of bead grooves. The silent linear slide in this embodiment is provided with four rows of bead grooves, each of which has steel balls rolling in it. If there are no steel balls at the head and tail ends of the retaining chain 6, then this means that there are no steel balls in the bead grooves at these locations to bear the load. Since there are no steel balls in these locations of the bead groove, the load will be concentrated on the other locations of the bead groove that have steel balls, causing the load at these locations to be greater than the locations without steel balls. This will lead to uneven load distribution between the rows of bead grooves, thereby affecting the performance and service life of the linear slide. The anti-rotation rib 7 is provided on the outside of the end member 13. In this structure, the anti-rotation rib 7 is provided on the outside of the end member 13 to limit unnecessary rotation of the end member 13 in the retaining chain 6.

[0027] The intermediate roller 17 is positioned with a small clearance between the arches 11 and the spacers 12. Specifically, the intermediate roller 17 at the leading and trailing ends of the retaining chain 6 is positioned with a clearance between the spacers 12 and the end member 13. In other words, the arches 11 of the stop rib 7 and the two spacers 12 on either side of the intermediate roller 17 at the leading and trailing ends of the non-retaining chain 6 enclose the intermediate roller 17. Similarly, the arches 11 of the stop rib 7, along with a spacer 12 and an end member 13, enclose the intermediate roller 17 at the leading and trailing ends of the retaining chain 6, further limiting its range of motion. Furthermore, the gaps between the intermediate roller 17 and the spacers 12, and between the intermediate roller 17 and the end member 13, are filled with an appropriate amount of lubricating fluid. This significantly facilitates smoother movement of the intermediate roller 17 and reduces friction, effectively reducing noise and wear during linear slide operation. The anti-rotation rib 7 is provided on the outer side of the spacer 12 . In this structure, the anti-rotation rib 7 is provided on the outer side of the spacer 12 to limit unnecessary rotation of the spacer 12 in the holding chain 6 .

[0028] The working principle of the present invention is that when the slider moves along the guide rail, the rolling elements in each retaining chain 6 of the silent linear slide, including the end side rolling elements 5 and the middle rolling elements 17, will roll along the bead grooves on the guide rail, thereby realizing the linear motion of the slider. In this process, the retaining chain 6 plays a guiding role through the special structure specially designed on the anti-rotation rib 7 inside it, and the return groove structure composed of the end cover anti-rotation groove 2 and the plastic-coated anti-rotation groove 4 enables the retaining chain 6 to circulate inside the slider. Specifically, when the retaining chain 6 enters the working area from the return groove, that is, the part that contacts the guide rail, the rolling elements inside it contact the bead grooves on the guide rail and roll along them. At this time, the anti-rotation rib 7 in the retaining chain 6 ensures that the rolling elements can smoothly exit the return groove through the transition section 9 and the tip section 10 on its unique inner inclined surface 8, reducing friction and collision during movement, thereby reducing the generation of noise, and thus achieving the silent effect of the slide rail. After the retaining chain 6 completes a complete cycle, it will return to the starting position through the reflow groove and enter the working area again. During this cycle, the negative step design between the end cover stop groove 2 and the plastic-coated stop groove 4 allows the retaining chain 6 to smoothly transition between different components, preventing the occurrence of jamming due to manufacturing or assembly errors, thereby ensuring the smoothness and reliability of the slider during operation. At the same time, the end side rolling elements 5 and the middle rolling elements 17 in the retaining chain 6 effectively limit the movement trajectory of the rolling elements through cooperation with the arched portion 11, the spacer 12 and the end component 13, preventing the above-mentioned rolling elements from unnecessary and unfavorable offsets during movement, and ensuring the stability of the slider throughout its entire service life. In summary, the utility model not only improves the silent performance of the silent linear slide rail, but also improves its smoothness and service life during operation by optimizing and improving the design of the retaining chain 6 and its related components.

[0029] The embodiments described above are only preferred solutions of the present invention and do not limit the present invention in any form. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the utility model should be included in the scope of protection of the present invention.

Claims

1. A silent linear guide rail, characterized in that: include: End cap (1), overmolded housing (3) and retaining chain (6); An end cover anti-rotation groove (2) is provided in the end cover (1), a plastic-coated anti-rotation groove (4) is provided in the plastic-coated housing (3) and is arranged along the length direction of the linear slide rail, and a retaining chain (6) is provided in the reflux groove structure formed by the end cover anti-rotation groove (2) and the plastic-coated anti-rotation groove (4), and the retaining chain (6) includes: A rotation-stopping rib (7), wherein the front and rear ends of the rotation-stopping rib (7) are provided with an inwardly inclined surface (8); The end piece (13) is tapered.

2. A silent linear guide rail according to claim 1, characterized in that: The inner inclined surface (8) is composed of a transition section (9) and a tip section (10), and the tip section (10) and the inner side planes of the front and rear ends of the anti-rotation rib (7) have an included angle α, and the degree of the included angle α is set between 10° and 35°.

3. The silent linear guide rail according to claim 1, characterized in that: The anti-rotation rib (7) is provided with an arched portion (11).

4. A silent linear guide rail according to claim 1, 2 or 3, characterized in that: The inner side of the end piece (13) is provided with a section plane (16).

5. A silent linear guide rail according to claim 1, 2 or 3, characterized in that: The end member (13) is provided with a first arc surface (14) and a second arc surface (15) at both ends.

6. A silent linear guide rail according to claim 1, 2 or 3, characterized in that: End side rolling members (5) are provided between the end members (13).

7. A silent linear guide rail according to claim 1, 2 or 3, characterized in that: The anti-rotation rib (7) is arranged on the outer side of the end member (13).

8. The silent linear guide rail according to claim 1, characterized in that: The silent linear slide rail further comprises an end cover anti-rotation groove (2) and a plastic-coated anti-rotation groove (4).

9. The silent linear guide rail according to claim 8, characterized in that: The fitting position of the end cover anti-rotation groove (2) and the plastic-coated anti-rotation groove (4) is a negative step.

10. The silent linear guide rail according to claim 3, characterized in that: The silent linear slide rail further comprises an intermediate rolling member (17), and the intermediate rolling member (17) is arranged between the arched portions (11).

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