Linear guide rail pair

Abstract

The application discloses a linear guide rail pair, which comprises a guide rail body, a sliding block, a return piece and a plurality of rolling balls, the guide rail body is provided with a first rolling groove; the sliding block is slidingly installed on the guide rail body, the sliding block is provided with a second rolling groove, a return channel and a ball return groove, the second rolling groove and the first rolling groove are combined into a sliding channel, one side of the ball return groove is provided with a first opening, and two ends of the ball return groove are communicated with the second rolling groove and the return channel respectively; the return piece is welded on the sliding block and closes the first opening; and the plurality of rolling balls are arranged in the sliding channel and can roll along the sliding channel. The linear guide rail pair can avoid machining positioning holes and threaded holes, has simple machining process, high yield, effectively reduces production cost, and has smooth rotation of the steel balls, smooth operation of the linear guide rail pair and reliable performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of guide rail pairs, in particular to a linear guide rail pair. BACKGROUND

[0002] To achieve smooth operation of the guide rail pair and smooth rotation of the steel ball during operation, a circulating channel for the steel ball to rotate is usually provided on the slider. Due to the limitation of the processing technology, the two ends of the circulating channel have notches, which need to be closed by installing a reverser to form a complete circulating channel. In the related art, to accurately install and fix the reverser, positioning holes and threaded holes need to be machined on the slider. For a micro linear guide rail pair, the positioning holes and threaded holes are small, which is difficult to machine and has a low yield. For a large linear guide rail pair, larger positioning holes and threaded holes need to be machined, which will cause the hole shrinkage deformation during the heat treatment process of the slider, and then cause poor cooperation of the reverser, affecting the rotation of the steel ball. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art. To this end, the present application provides a linear guide rail pair, which can eliminate the need for machining positioning holes and threaded holes, has a simple processing technology, a high yield, effectively reduces production costs, and smooth rotation of the steel ball, smooth operation of the linear guide rail pair, and reliable performance.

[0004] The linear guide rail pair according to the embodiment of the present application comprises: a guide rail body provided with a first raceway; a slider slidably installed on the guide rail body, the slider being provided with a second raceway, a return channel and a ball return groove, the second raceway and the first raceway combining to form a slide, one side of the ball return groove being provided with a first opening, and the two ends of the ball return groove being in communication with the second raceway and the return channel respectively; a return piece welded to the slider and closing the first opening; and a plurality of rolling balls arranged in the slide and capable of rolling along the slide.

[0005] The above technical solution has at least the following beneficial effects: by arranging the return piece, the return piece is directly welded and fixed to the slider, the return piece closes the first opening of the ball return groove, the connection of the return piece is stable and reliable, and there is no need to machine positioning holes and threaded holes on the slider, which simplifies the processing technology, reduces the processing difficulty, effectively improves the yield and reduces the production cost. At the same time, by arranging the return piece, the slide, the ball return groove and the return channel combine to form a circulating channel, the connection of the return piece and the slider is stable and good, the rolling balls can rotate smoothly in the circulating channel, the linear guide rail pair operates smoothly, and the performance is reliable.

[0006] Thus, the slide, the ball return groove and the return channel combine to form a circulating channel for the rolling balls to rotate,

[0007] According to some embodiments of the present application, the return groove is arc-shaped along the length direction of the return groove, and the return piece is an arc-shaped plate matching the return groove.

[0008] According to some embodiments of the present application, the slider is provided with a positioning groove, and the return piece is accommodated in the positioning groove and abuts against the groove wall of the positioning groove.

[0009] According to some embodiments of the present application, one end of the positioning groove is provided with a second opening, and the return piece can pass through the second opening.

[0010] According to some embodiments of the present application, the depth of the positioning groove is equal to the thickness of the return piece.

[0011] According to some embodiments of the present application, the return piece is provided with a guide plate at one end of the guide rail body, and the guide plate extends into the first raceway.

[0012] According to some embodiments of the present application, the guide plate is bent towards the inside of the slide.

[0013] According to some embodiments of the present application, the return piece is a stainless steel piece.

[0014] According to some embodiments of the present application, the corner position of the return piece is provided with a notch.

[0015] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 It is a structural schematic diagram of the linear guide rail pair in the embodiment of the present application;

[0018] Figure 2 It is a top view sectional view of the linear guide rail pair in the embodiment of the present application;

[0019] Figure 3 It is Figure 2 the enlarged view at A in FIG. 4;

[0020] Figure 4 It is a structural schematic diagram of the slider in the embodiment of the present application;

[0021] Figure 5 It is a structural schematic diagram of the return piece in the embodiment of the present application.

[0022] Reference Signs:

[0023] Guide rail body 100; first raceway 110; lubricating groove 120;

[0024] Slider 200; second raceway 210; return channel 220; return ball groove 230; first opening 231; positioning groove 240; second opening 241; mounting groove 250;

[0025] Return piece 300; guide plate 310; notch 320;

[0026] Rolling ball 400;

[0027] Slide 500. DETAILED DESCRIPTION

[0028] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0029] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application 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, therefore it cannot be understood as a limitation on the present application.

[0030] In the description of the present application, several meanings are one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0031] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be understood broadly, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0032] Referring to Figures 1 to 5 The embodiment of the present application provides a linear guide rail pair, which comprises a guide rail body 100, a slider 200, a plurality of rolling balls and a return piece 300, wherein the slider 200 is in sliding fit with the guide rail body 100, so as to realize guiding of a component and movement of the component along a certain track, such as application in a numerical control machine tool, guiding of a machining table or a machining head.

[0033] Referring to Figure 1 andFigure 2 As shown in the drawings, it can be understood that the guide rail body 100 is in a long strip structure, the cross section is rectangular, the guide rail body 100 has a length direction and a width direction, and the width direction is the long side direction of the rectangular cross section.

[0034] Referring to Figure 1 and Figure 2 As shown in the drawings, it can be understood that the guide rail body 100 is symmetrically provided with the first rolling track 110 on both sides in the width direction, the first rolling track 110 is arranged along the length direction of the guide rail body 100, and the cross section of the first rolling track 110 is approximately semicircular. It is easy to understand that the inner wall of the first rolling track 110 is also provided with a recessed lubricating groove 120.

[0035] Referring to Figure 1 and Figure 4 As shown in the drawings, it can be understood that the slider 200 is in a cuboid structure, the lower end of the slider 200 is provided with a mounting groove 250, the mounting groove 250 is located in the middle, and the mounting groove 250 penetrates along the length direction of the guide rail body 100, the upper part of the guide rail body 100 is accommodated in the mounting groove 250, so that the slider 200 can slide along the length direction of the guide rail body 100 relative to the guide rail body 100.

[0036] Referring to Figure 2 and Figure 4 As shown in the drawings, it can be understood that the slider 200 is provided with the second rolling track 210, the return channel 220 and the ball return groove 230. Specifically, the mounting groove 250 is provided with the second rolling track 210 on both side groove walls in the width direction of the guide rail body 100, the second rolling track 210 penetrates along the length direction of the guide rail body 100, the cross section of the second rolling track 210 is approximately semicircular, and the two second rolling tracks 210 are correspondingly provided with the two first rolling tracks 110. Along the width direction of the guide rail body 100, the first rolling track 110 and the second rolling track 210 on the same side are combined to form a sliding track 500.

[0037] Referring to Figure 2 and Figure 4 As shown in the drawings, it can be understood that the slider 200 is correspondingly provided with two return channels 220, the two return channels 220 correspond to the two second rolling tracks 210 respectively, the return channel 220 penetrates along the length direction of the guide rail body 100, and the return channel 220 is parallel to the second rolling track 210. Along the width direction of the guide rail body 100, among the return channel 220 and the second rolling track 210 on the same side, the return channel 220 is located on the side away from the mounting groove 250 of the second rolling track 210.

[0038] Referring to Figure 2 , Figure 3 and Figure 4 ​As shown, it can be understood that the slider 200 is further provided with four ball return grooves 230, which are divided into two groups and arranged on both sides of the slider 200 along the length direction of the guide rail body 100, and the ball return grooves 230 are arranged along the width direction of the guide rail body 100. Along the width direction of the guide rail body 100, in the two ball return grooves 230 on the same side, the two ends of each ball return groove 230 are respectively communicated with the second raceway 210 and the return channel 220, so that the second raceway 210, the return channel 220 and the two ball return grooves 230 on the same side are combined to form a circular circulation channel.

[0039] Referring to Figure 4 As shown, it can be understood that, in order to facilitate the processing of the second raceway 210 and the return channel 220, the side of the ball return groove 230 away from the second raceway 210 (or the return channel 220) is provided with a first opening 231, that is, the first opening 231 faces one side along the length direction of the guide rail body 100.

[0040] Referring to Figure 2 and Figure 3 As shown, it can be understood that, in order to close the first opening 231 to form a complete circulation channel, four return flaps 300 are correspondingly provided, the return flaps 300 are in a flap structure, and the return flaps 300 are welded and fixed to the slider 200, so that the four return flaps 300 correspondingly close the four first openings 231.

[0041] Referring to Figure 2 and Figure 3 As shown, it can be understood that the rolling balls are steel balls, and the plurality of rolling balls are respectively accommodated in the slide 500 and can roll along the slide 500. Since the return flaps 300 close the first openings 231 of the ball return grooves 230, when the slider 200 slides relative to the guide rail body 100, the rolling balls slide in the slide 500 and are guided by the return flaps 300 to roll from the slide 500 to the return channel 220 through the ball return groove 230 at one end along the length direction of the guide rail body 100, and at the other end, the rolling balls roll from the return channel 220 to the slide 500 through the ball return groove 230, so that the rolling balls roll smoothly in the circulation channel, thereby improving the smoothness of the relative sliding of the slider 200 and the guide rail body 100 and the performance is reliable.

[0042] By setting the return sheet 300, the return sheet 300 is directly welded and fixed to the sliding block 200, the return sheet 300 closes the first opening 231 of the ball return groove 230, the return sheet 300 is connected stably and reliably, and there is no need to process positioning holes and threaded holes on the sliding block 200, which simplifies the processing process, reduces the processing difficulty, effectively improves the yield and reduces the production cost. At the same time, by setting the return sheet 300, the slide 500, the ball return groove 230 and the return channel 220 are combined to form a circulating channel, the return sheet 300 is connected stably and cooperates well with the sliding block 200, which ensures that the rolling ball can rotate smoothly in the circulating channel, so that the linear guide pair runs smoothly and reliably.

[0043] Referring to Figure 3 As shown in the drawings, it can be understood that along the length direction of the ball return groove 230, the ball return groove 230 is arranged in an arc shape, that is, from the top view, the ball return groove 230 is in an arc shape. Correspondingly, the return sheet 300 is arranged as an arc plate matching the arc at the first opening 231 of the ball return groove 230, and the return sheet 300 is attached to the sliding block 200. Therefore, after the return sheet 300 closes the first opening 231, the slide 500 and the return channel 220 are connected in an arc shape, which reduces the resistance when the rolling ball rolls from the slide 500 to the return channel 220 through the ball return groove 230 or from the return channel 220 to the slide 500 through the ball return groove 230, so that the rolling ball rolls smoothly, further improving the smoothness of the relative sliding between the sliding block 200 and the guide body 100, and improving the reliability.

[0044] Referring to Figures 2 to 4 As shown in the drawings, it can be understood that in order to accurately install the return sheet 300 and make the return sheet 300 completely close the first opening 231, the sliding block 200 is further provided with a positioning groove 240. Correspondingly, the sliding block 200 is provided with four positioning grooves 240, and the four positioning grooves 240 correspond one by one to the four first openings 231, that is, the first opening 231 is located at the bottom wall of the positioning groove 240. Generally speaking, the coverage area of the return sheet 300 is larger than that of the first opening 231, therefore, the coverage area of the positioning groove 240 is larger than that of the first opening 231, the return sheet 300 is accommodated in the positioning groove 240, and the return sheet 300 is attached to the bottom wall of the positioning groove 240. The side wall of the return sheet 300 abuts against the groove wall of the positioning groove 240, so as to accurately position the return sheet 300, ensure that the return sheet 300 can completely cover the first opening 231, make the return sheet 300 cooperate well with the sliding block 200, and facilitate welding and fixing of the return sheet 300, and facilitate assembly.

[0045] Referring to Figure 4As shown, it can be understood that one end of the positioning groove 240 is provided with a second opening 241, specifically, the lower end of the positioning groove 240 is provided with the second opening 241, and the return piece 300 can pass through the second opening 241. When installing the return piece 300, the return piece 300 is passed through the second opening 241 and inserted into the positioning groove 240 until the side wall of the return piece 300 abuts against the upper end side wall of the positioning groove 240, so as to realize positioning of the return piece 300 and facilitate assembly. Moreover, in the up-down direction, the height of the return piece 300 does not need to be accurately machined, which is conducive to reducing the machining difficulty.

[0046] Referring to Figure 3 As shown, it can be understood that the depth of the positioning groove 240 is equal to the thickness of the return piece 300, so that after the return piece 300 is installed in the positioning groove 240, the return piece 300 is flush with the outer wall of the sliding block 200, which on the one hand improves the appearance, and on the other hand avoids the return piece 300 from protruding relative to the outer wall of the sliding block 200 or the sliding block 200 from protruding relative to the return piece 300 to scratch the operator or hinder the operation of the components.

[0047] Referring to Figure 3 and Figure 5 As shown, it can be understood that one end of the return piece 300 towards the guide rail body 100 is provided with a guide piece, specifically, the guide piece extends into the first raceway 110, and the end of the guide piece is in an arc-shaped structure which is fitted with the inner wall of the first raceway 110. In the process of rolling the ball from the slide 500 to the return channel 220 through the ball return groove 230, the guide piece blocks the ball from separating from the slide 500 along the length direction of the guide rail body 100 and guides the ball to the ball return groove 230, so that the ball rotates smoothly, which is conducive to improving the smoothness of the relative sliding between the sliding block 200 and the guide rail body 100 and improving the reliability.

[0048] Referring to Figure 3 As shown, it can be understood that the guide piece is bent towards the inside of the slide 500, that is, the guide part is biased to the side of the ball located in the slide 500, so that the transition between the slide 500 and the ball return groove 230 is a slope, which enhances the guiding effect, makes the ball smoothly roll from the slide to the ball return groove 230, and makes the ball rotate more smoothly, which is conducive to further improving the smoothness of the relative sliding between the sliding block 200 and the guide rail body 100 and improving the reliability.

[0049] It can be understood that the return piece 300 is made of stainless steel, which has good high-temperature resistance and corrosion resistance, improves the reliability of the linear guide rail pair, and is more suitable for special occasions such as high-temperature environments.

[0050] Referring to Figure 1 and Figure 5As shown, it can be understood that the four corners of the return sheet 300 are respectively provided with notches 320, when the return sheet 300 is installed in the positioning groove 240, the notches 320 are convenient to fill the solder, so that the return sheet 300 is welded and fixed on the slider 200, and the connection is stable and reliable.

[0051] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. Linear guide rail pair, characterized in that The utility model relates to a guide rail and sliding block combination, comprising: A guide rail body is equipped with first raceway; A sliding block is slidably installed on the guide rail body, the sliding block is equipped with second raceway, return channel and return ball groove, the second raceway and the first raceway are combined into slide, one side of the return ball groove is equipped with first opening, and both ends of the return ball groove are communicated with the second raceway and the return channel respectively; A return sheet is welded on the sliding block and closes the first opening; A plurality of rolling balls are arranged in the slide and can roll along the slide.

2. The linear guide rail pair according to claim 1, characterized by: Along the length direction of the return ball groove, the return ball groove is arc-shaped, and the return sheet is an arc-shaped plate matched with the return ball groove.

3. The linear guide rail pair according to claim 1 or 2, characterized by: The sliding block is provided with a positioning groove, and the return sheet is accommodated in the positioning groove and abuts against the groove wall of the positioning groove.

4. The linear guide rail pair according to claim 3, characterized by: One end of the positioning groove is provided with a second opening, and the return sheet can pass through the second opening.

5. The linear guide rail pair according to claim 3, characterized by: The depth of the positioning groove is equal to the thickness of the return sheet.

6. The linear guide rail pair according to claim 1, characterized by: One end of the return sheet towards the guide rail body is provided with a guide plate, and the guide plate extends into the first raceway.

7. The linear guide rail pair according to claim 6, characterized by: The guide plate is bent towards the inside of the slide.

8. The linear guide rail pair according to claim 1, characterized by: The return sheet is a stainless steel part.

9. The linear guide rail pair according to claim 8, characterized by: The corner position of the return sheet is provided with a notch.

Images