Linear guide rail sliding block

Abstract

The utility model relates to the technical field of linear guide rails, in particular to a linear guide rail sliding block which comprises a sliding block body, and the sliding block body is provided with a load groove matched with a groove in a sliding rail and a circular hole channel. And the circulators are arranged at the two ends of the sliding block body, each circulator is provided with a first transition face and a second transition face, the first transition faces are connected with the load grooves, the section radians of the connection positions are the same, and the second transition faces are connected with the circular hole channels. According to the sliding block, the multi-section gradually-changed transition surface is arranged on the circulator, so that the section difference between a load area and the circulator and the section difference between the circulator and the circular hole channel are eliminated, a full-period section-difference-free running path of the rolling body is realized, and the stability of the sliding block in the whole running process is ensured.

Description

Technical Field

[0001] This application relates to the field of linear guide technology, and in particular to a linear guide slider. Background Technology

[0002] The linear guide rail uses rolling elements to circulate between the slider and the rail, causing the slider to move along the length of the rail. During the rolling process between the slider and the rail, the rolling elements move from the load area between the slider and the rail into the unloaded area between the return cover and the circulator, and return to the slider through the arc-shaped raceway on the return cover. The rolling elements that roll out from the circular channel in the slider return to the load area between the slider and the rail through the return cover.

[0003] However, in existing sliders, during the movement of the rolling elements from the load region to the unload region, the different cross-sectional shapes of the load channel, the unloaded circulation channel, and the circular channel lead to step differences at the junctions of different cross-sectional shapes throughout the circulation path. For example... Figure 2 As shown in small figure a, periodic motion fluctuations also occur when the rolling element passes through the step section. Utility Model Content

[0004] The technical problem this invention aims to solve is that when a rolling element passes between a loaded area and an unloaded area, it is prone to motion fluctuations, which affect the smoothness of rolling and its service life.

[0005] Therefore, this utility model provides a linear guide slider.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A linear guide slider, comprising,

[0008] The slider body is provided with a load groove and a circular channel that are adapted to the groove on the slide rail;

[0009] A circulator is provided at both ends of the slider body. The circulator has a first transition surface and a second transition surface. The first transition surface is connected to the load groove and the cross-sectional curvature at the connection point is the same. The second transition surface is connected to the circular channel.

[0010] Furthermore, the first transition surface is a gradient transition surface.

[0011] Furthermore, the load groove and the first transition surface near the load groove adopt a Gothic channel, with the curvatures of the upper and lower parts being R3 and R4, respectively.

[0012] Furthermore, the second transition surface adopts a single circular arc cross-sectional shape with a cross-sectional curvature of R2.

[0013] Furthermore, the first transition surface near the second transition surface adopts a single circular arc channel with an arc of R2.

[0014] Furthermore, the circulator is integrally formed with the slider body.

[0015] Furthermore, the rolling element bears the load in both the first transition surface and the load channel. The diameter of the rolling element is Dw, the length of the first transition surface is L, and the length of the slider body is K. (K+2L) / Dw=A·Dw+B·Dw, where: A is a positive integer and B is a decimal between 0.5 and 1.

[0016] The beneficial effect of this utility model is that by setting a multi-segmented gradual transition surface on the circulator, the step difference between the load area and the circulator, and between the circulator and the circular channel is eliminated, thereby realizing a stepless running path for the rolling element throughout the entire cycle and ensuring the stability of the slider during the overall operation.

[0017] Furthermore, by setting a first transition surface that matches the curvature of the load channel, the length of the load area is extended, reducing the variation in the effective number of rolling elements, thereby reducing the periodic fluctuations in the overall slider caused by changes in the force on the rolling element slider body. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the linear guide rail structure in this invention, which can reduce the vibration of the rolling element.

[0020] Figure 2 This is a schematic diagram of the positional relationship between the slider and the circulator in the background art and in this invention.

[0021] Figure 3 This is a schematic diagram of the transition groove in this invention.

[0022] Figure 4 This is a schematic diagram illustrating the change in the number of rolling elements under load.

[0023] In the figure: 1. Slider body; 11. Load groove; 12. Circular channel; 2. Circulator; 21. First transition surface; 22. Second transition surface; 3. Return cover; 31. Limiting groove; 4. Slide rail. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Reference Figure 1 A linear guide slider includes a slider body 1 and a circulation part. The slider body 1 is provided with a groove that mates with a slide rail 4. The circulation part is located at both ends of the slider body 1 and on both sides of the groove. It should be noted that the circulation part and the slider body 1 are integrally formed by powder metallurgy. In use, a return cover 3 is provided at the end of the slider body 1, and the return cover 3 is provided with a limiting groove 31 opposite to the circulation part.

[0028] A load groove 11 is provided on the side wall of the slide groove, and circular channels 12 are provided on both sides of the slide groove on the slider body 1. A first transition surface 21 and a second transition surface 22 are provided on the circulation part. The first transition surface 21 and the second transition surface 22, together with the limiting groove 31 on the return cover 3, form a return channel. The slider body 1 is mounted on the slide rail 4. The groove on the slide rail 4 and the load groove 11 together form the load channel. The load groove 11 part of the load channel is set as a Gothic channel. The return channel connects the load channel and the circular channel 12. The rolling element rolls in the load channel, enters the circular channel 12 through the return channel, rolls out of the circular channel 12, and then returns to the load channel through the return channel at the other end, thus repeating the cycle.

[0029] Reference Figure 2 small image b in the middle and Figure 3The first transition surface 21 connects to the load groove 11 with the same cross-sectional curvature at the connection point. The second transition surface 22 connects to the circulation groove. The first transition surface 21 is a gradient transition surface. The side of the first transition surface 21 closest to the load groove 11 and the load groove 11 adopt the same Gothic groove, with curvatures of R3 and R4 for the upper and lower parts, respectively. The side of the first transition surface 21 closest to the second transition surface 22 and the second transition surface 22 adopts a single circular arc cross-sectional shape with a curvature of R2, thereby eliminating the step difference between the first transition surface 21 and the circulation groove. The radii of the circulation groove and the circular channel 12 are both R1, and R2 = R1. Thus, the rolling element achieves stepless operation throughout the entire cycle between the load groove, the return groove, and the circular channel 12, avoiding fluctuations in the rolling element and improving the smoothness of the rolling element's rolling.

[0030] Furthermore, 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 of ensuring that the overall length of the slider body 1 remains unchanged, it is stipulated that: (K+2L) / rolling body diameter Dw=A·Dw+B·Dw (where: A is a positive integer, and B is a decimal between 0.5 and 1).

[0031] In existing sliders, due to the step difference between the load channel and the circulation section, the rolling elements are only effective load rolling elements in the load channel on the slider body 1. Because rolling gaps exist between the effective load rolling elements during cyclic rolling, the number of effective load rolling elements changes during the cyclic rolling process, with the change being one rolling element. Figure 4 In the figures a and b, the rolling gap in figure a is located between the loaded and unloaded areas, and the number of rolling elements in the loaded area is N-1; in figure b, the rolling gap is located within the loaded area, and the number of rolling elements in the loaded area is N.

[0032] In this application, reference is made to Figure 4 In the diagrams c and d, in diagram a, the rolling gap is located between the load area and the unloaded area, with N-1 rolling elements in the load area; in diagram b, the rolling gap is located within the load area, with N rolling elements in the load area. Based on the setting of the first transition surface 21 and the second transition surface 22, and the integral molding of the slider body 1 and the circulation part, the rolling elements can bear the load in both the first transition surface 21 and the load channel. Through the above relationship, it is ensured that the number of effective load rolling elements is greater than the number of effective rolling elements in the slider body 1 without the transition surface, and the variation in the number of effective rolling elements is ≤0.5Dw, thus keeping the number of effective load rolling elements in the slider structure constant. Therefore, the load on each effective load rolling element is the same and the load magnitude remains stable, improving the service life of the rolling elements.

[0033] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A linear guide rail slide, characterized by, include, The slider body (1) is provided with a load groove (11) and a circular channel (12) that are adapted to the groove on the slide rail (4); The circulator (2) is disposed at both ends of the slider body (1). The circulator (2) is provided with a first transition surface (21) and a second transition surface (22). The first transition surface (21) is connected to the load groove (11) and the cross-sectional curvature at the connection point is the same. The second transition surface (22) is connected to the circular channel (12).

2. The linear guide rail slide according to claim 1, characterized in that, The first transition surface (21) is a gradual transition surface.

3. The linear guide rail slide according to claim 2, wherein, The load groove (11) and the first transition surface (21) near the load groove (11) adopt Gothic channels, and the curvatures of the upper and lower parts are R3 and R4 respectively.

4. The linear guide rail slide of claim 1, wherein, The second transition surface (22) adopts a single circular arc cross-sectional shape with a cross-sectional curvature of R2.

5. The linear guide rail slide of claim 2, wherein, The first transition surface (21) near the second transition surface (22) adopts a single circular arc channel with an arc of R2.

6. The linear guide rail slide of claim 1, wherein, The circulator (2) is integrally formed with the slider body (1).

7. The linear guide rail slide of claim 1, wherein, The rolling element bears the load in both the first transition surface (21) and the load channel. The diameter of the rolling element is Dw, the length of the first transition surface (21) is L, and the length of the slider body (1) is K. (K+2L) / Dw = A·Dw+B·Dw, where: A is a positive integer and B is a decimal between 0.5 and 1.

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