Linear guide with return cover to reduce vibration of
By designing the transition surface and limiting groove of the circulator and return cover in the linear guide, the problem of discontinuous change in the rolling element's motion trajectory is solved, thus achieving smooth operation of the rolling element and improving its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2026-04-10
AI Technical Summary
In existing linear guideways, the motion trajectory of the rolling elements as they enter and exit the return cover changes discontinuously, causing periodic fluctuations in the slider's operation.
Design a linear guide with a return cover to reduce the vibration of the rolling elements. By setting a circulator and a return cover on the slider body, and utilizing the design of transition surfaces and limiting grooves, the movement trajectory of the rolling elements is made into a continuous path, eliminating step differences and ensuring the smoothness and continuity of the rolling element operation.
This achieves smooth operation of the rolling elements, avoids operational fluctuations, and improves the smoothness of the slider's operation and the service life of the rolling elements.
Smart Images
Figure CN224107563U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of linear guide rails, in particular to a linear guide rail with a return cover capable of reducing vibration of rolling elements. BACKGROUND
[0002] The linear guide rail enables the rolling elements to circulate between the slider and the slide rail, so that the slider moves along the length direction of the slide rail.
[0003] However, the return cover is connected to the load groove and the circular hole in a discontinuous path, which causes the motion trajectory of each rolling element to change discontinuously when entering and exiting the return cover, resulting in periodic running fluctuations of the slider. CONTENT OF THE UTILITY MODEL
[0004] The present application relates to the technical field of linear guide rails, in particular to a linear guide rail with a return cover capable of reducing vibration of rolling elements.
[0005] Therefore, the present application provides a linear guide rail with a return cover capable of reducing vibration of rolling elements.
[0006] The technical solution adopted by the present application to solve the technical problem is:
[0007] The linear guide rail with a return cover capable of reducing vibration of rolling elements comprises,
[0008] The slider body is provided with a circular hole and a load groove adapted to the groove on the slide rail.
[0009] The circulator is arranged at both ends of the slider body, and the circulator is provided with a transition surface for connecting the load groove and the circular hole.
[0010] The return cover is arranged at the end of the slider, and the return cover is provided with a limiting groove opposite to the circulation part.
[0011] Further, the incident angle β of the rolling element entering the limiting groove from the load groove is less than 45°.
[0012] Further, the center line of the limiting groove is an arc of an ellipse, and the extension direction of the major radius a of the arc is arranged along the length direction of the slider body.
[0013] Further, a cross section perpendicular to the length direction of the slider body and passing through the end face of the circular channel is defined as a reference plane, with the projection points of the center line of the circular channel and the center line of the groove on the slide rail on the reference plane being C1 and C2 respectively, the midpoint of the line connecting C1 and C2 being O, and the short radius of the center line of the limiting groove being b, b=OC1=OC2, 0.9≤b / a<0.95.
[0014] Further, the transition surface specifically includes a first transition surface and a second transition surface, the first transition surface being connected with the load groove and having the same cross-sectional curvature at the connection, and the second transition surface being connected with the circular channel.
[0015] Further, the load groove and the side of the first transition surface close to the load groove adopt a Gothic groove, the upper and lower portions of which have curvatures of R3 and R4 respectively.
[0016] Further, the second transition surface adopts a single circular arc cross-sectional shape, and the cross-sectional curvature thereof is R2.
[0017] Further, the side of the first transition surface close to the second transition surface adopts a single circular arc groove, and the curvature thereof is R2.
[0018] Further, the circulator is integrally formed with the slider body.
[0019] The beneficial effects of the present application are that the extension line of the end surface of the limiting groove on the return cover is set as the tangent of the load groove and the circular channel, the shooting angle β of the rolling body entering the limiting groove from the load groove is less than 45°, so that the movement track of the rolling body each time when entering and exiting the return cover is a continuous path, the stability and continuity of the rolling body are ensured, and the running fluctuation such as lifting of the rolling body is avoided.
[0020] Further, the segmented transition surface is arranged on the circulator, the step difference between the load groove, the circulator and the circular channel is eliminated, and the stability of the whole slider during running is further ensured. BRIEF DESCRIPTION OF DRAWINGS
[0021] The present application will be further described below in combination with the drawings and embodiments.
[0022] Figure 1 is a structural schematic view of a linear guide rail through which the rolling body can be reduced in vibration in the present application.
[0023] Figure 2 is a structural schematic view of the position relationship between the slider and the circulator in the background art and the present application.
[0024] Figure 3 is a structural schematic view of a transition groove in the present application.
[0025] Figure 4 is a schematic diagram of the load roller number change.
[0026] Figure 5 is a schematic diagram of the limiting groove in the present application.
[0027] In the figure: 1, slider body; 11, load groove; 12, circular hole; 2, circulating device; 21, first transition surface; 22, second transition surface; 3, return cover; 31, limiting groove; 4, slide rail. DETAILED DESCRIPTION
[0028] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic manner, so they only show the structure related to the utility model.
[0029] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model. In addition, the features limited as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0030] In the description of the utility model, it is explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0031] Reference Figure 1 , 2The utility model relates to a linear guide rail with a return cover reducing the vibration of rolling body, comprising a slider body 1, a circulating device 2 and a return cover 3, the slider body 1 is provided with a sliding groove matched with a sliding rail 4, the circulating device 2 is arranged at both ends of the slider body 1 and at both sides of the sliding groove, it is explained that the circulating device 2 is integrally formed with the slider body 1 by powder metallurgy process in the application. The return cover 3 is arranged at both ends of the slider body 1, and the return cover 3 is provided with a limiting groove 31 opposite to the circulating device 2.
[0032] A load groove 11 is arranged on the side wall of the sliding groove, and circular holes 12 are arranged on both sides of the sliding groove on the slider body 1. The circulating device 2 is provided with a first transition surface 21 and a second transition surface 22, the first transition surface 21 and the second transition surface 22 jointly form a return channel with the limiting groove 31 on the return cover 3, the slider body 1 is installed on the sliding rail 4, and a groove on the sliding rail 4 jointly forms a load channel with the load groove 11, part of the load groove 11 in the load channel is arranged as a gothic channel, and the return channel is connected between the load channel and the circular holes 12. The rolling body rolls in the load channel, enters the circular holes 12 through the return channel, rolls out of the circular holes 12 and then returns to the load channel through the return channel at the other end, so as to circulate repeatedly.
[0033] Referring to Figure 2 b small drawing in and Figure 3 , the first transition surface 21 is connected with the load groove 11 and the cross section of the connecting part has the same curvature, the second transition surface 22 is connected with the circulating groove, the first transition surface 21 is arranged as a gradual transition surface, the side of the first transition surface 21 close to the load groove 11 adopts the same gothic channel, and the curvatures of the upper and lower parts thereof are R3 and R4 respectively; the side of the first transition surface 21 close to the second transition surface 22 adopts a single circular arc cross section, and the cross section curvature thereof is R2, so that the gap between the first transition surface 21 and the second transition surface 22 is eliminated; the radius of the circulating groove and the circular holes 12 is R1, and R2=R1. Therefore, the rolling body realizes gapless operation in the whole cycle among the load channel, the return channel and the circular holes 12, the rolling body is prevented from generating fluctuation, and the smoothness of rolling of the rolling body is improved.
[0034] Further, along the length direction of the slider body 1, the length of the slider body 1 is K, and the length of the first transition surface 21 is L, under the premise that the length of the whole slider body 1 is unchanged, it is specified that (K+2L) / rolling body diameter Dw=A·Dw+B·Dw (wherein: A is a positive integer, and B is a decimal between 0.5 and 1).
[0035] In the existing slider body 1 (referring to Figure 2In the a small graph in FIG. 1, due to the existence of the step between the load channel and the circulator 2, the rolling body is only the effective load rolling body in the load channel on the slider body 1. Due to the existence of the rolling gap between the effective load rolling bodies when the rolling body circulates, the number of the effective load rolling bodies changes during the circulation, and the change number is one rolling body (refer to Figure 4 In the a, b small graphs in FIG. 1, the rolling gap is located between the load area and the non-load area in the a small graph, and the number of the rolling bodies in the load area is N-1; the rolling gap is located in the load area in the b small graph, and the number of the rolling bodies in the load area is N.
[0036] In the present application, refer to Figure 4 In the c, d small graphs in FIG. 1, the rolling gap is located between the load area and the non-load area in the a small graph, and the number of the rolling bodies in the load area is N-1; the rolling gap is located in the load area in the b small graph, and the number of the rolling bodies in the load area is N. Based on the settings of the first transition surface 21 and the second transition surface 22, and the integral molding of the slider body 1 and the circulator 2, the rolling body can bear the load in the first transition surface 21 and the load channel. Through the above relationship, the number of the effective load rolling bodies is ensured to be greater than the number of the effective rolling bodies in the slider body 1 without the transition surface, and the number of the effective rolling bodies changes ≤0.5Dw, so that the number of the effective load rolling bodies in the structure of the slider body 1 remains unchanged, the load on each effective load rolling body is the same, and the load size remains stable, thereby improving the service life of the rolling body.
[0037] Refer to Figure 5 In the plane where the center line of the circular channel 12 and the center line of the groove on the slide rail 4 are located, the center line of the limiting groove 31 on the return cover 3 is set as an arc of an ellipse. The extension lines of the end curves of the limiting groove 31 are tangent to the groove on the slide rail 4 and the circular channel 12 on the slider body 1, respectively. The incident angle β of the rolling body entering the limiting groove 31 from the load channel is less than 45°. Further, the extension line of the curve of the end of the limiting groove 31 close to the passage between the slide rail 4 and the load channel is tangent to the groove on the slide rail 4.
[0038] A cross section perpendicular to the length direction of the slider body 1 and passing through the end face of the circular channel 12 is defined as a reference surface. The projection points of the center line of the circular channel 12 and the center line of the groove on the slide rail 4 on the reference surface are C1 and C2, respectively. The midpoint of the line connecting C1 and C2 is O point. A straight line passing through the O point and arranged along the length direction of the slider body 1 is defined as a reference line. The center line of the limiting groove 31 is an arc of an ellipse. The long radius of the arc is arranged along the reference line, and the long radius is a, and the short radius is b. Wherein, b=OC1=OC2, and 0.9≤b / a<0.95.
[0039] The limiting groove 31 of the oval design avoids the running fluctuation of the rolling body when it runs, and the rolling body can smoothly enter the return channel along the limiting groove 31.
[0040] The above ideal embodiments according to the utility model are used as inspiration, and through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined by the scope of claims.
Claims
1. A linear guide rail having a return cover that reduces the passage of a rolling element through vibration, characterized by, The utility model relates to a kind of sliding block, including, Sliding block body (1), the circular channel (12) is provided on the sliding block body (1), and load groove (11) is adapted to groove on sliding rail (4); Circulator (2) is provided at both ends of sliding block body (1), and transition surface is provided on the circulator (2), and the transition surface is used to link load groove (11) and circular channel (12); Return cover (3) is covered in the end of sliding block body (1), and limiting slot (31) is provided on the return cover (3) opposite to circulation part, and the extension line of the end surface of limiting slot (31) is tangent to groove on sliding rail (4) and circular channel (12) on sliding block body (1) respectively.
2. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 1, characterized by, The incident angle β of the rolling body from load groove (11) into limiting slot (31) is less than 45 °.
3. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 1, characterized by, The center line of limiting slot (31) is a segment of elliptical arc, and the extension direction of long radius a of the elliptical arc is arranged along the length direction of sliding block body (1).
4. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 3, characterized by, The cross section perpendicular to the length direction of sliding block body (1) and passing through the end surface of circular channel (12) is defined as reference surface, and the projection points of the center line of circular channel (12) and the center line of groove on sliding rail (4) on reference surface are C1 and C2 respectively, the midpoint of C1 and C2 connecting line is O point, the short radius of the center line of limiting slot (31) is b, b=OC1=OC2, 0.9≤b / a<0.
95.
5. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 1, characterized by, The transition surface specifically includes first transition surface (21) and second transition surface (22), the first transition surface (21) links with load groove (11) and the cross section curvature of junction is same, and the second transition surface (22) links with circular channel (12).
6. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 5, characterized by, Gothic channel is used near load groove (11) side of load groove (11) and first transition surface (21), and the curvature of upper and lower two parts is R3 and R4 respectively.
7. The linear guide rail with a return cover that reduces the passage of a rolling element by vibration according to claim 5, characterized by, Second transition surface (22) adopts single circular arc cross section shape, and the cross section curvature is R2.
8. The linear guide rail with a return cap that reduces the passage of a rolling element by vibration according to claim 7, characterized by, Single circular arc channel is used near second transition surface (22) side of first transition surface (21), and the curvature is R2.
9. The linear guide rail with a return cap that reduces the passage of a rolling element by vibration according to claim 1, characterized by, Circulator (2) is integrally formed with sliding block body (1).