A cross-shaped linear guide rail

Abstract

This utility model relates to a cross-shaped linear guide rail, comprising: a first mounting groove on the top surface of a cross slider, and a second mounting groove on the bottom surface of the cross slider; the central axis of the first mounting groove is perpendicular to the central axis of the second mounting groove; second arc grooves are provided on both sides of the first guide rail; and the first guide rail is slidably connected to the cross slider by ball bearings disposed between the first and second arc grooves; the second guide rail includes two cross guide rails and a middle guide rail respectively disposed on the inner wall of the first mounting groove, wherein the first guide rail and the second guide rail form an orthogonal transmission unit. This utility model uses an integrated cross slider and sets the second guide rail as a three-piece cross roller guide rail, which can minimize the installation height of the cross-shaped linear guide rail, making it suitable for space-constrained scenarios; the point contact characteristics of the cross roller guide rail can eliminate gaps, and combined with the high guiding accuracy of the first guide rail, it meets the requirements of precision machining.

Description

Technical Field

[0001] This utility model relates to the field of linear guide technology, specifically to a cross-shaped linear guide. Background Technology

[0002] The cross-shaped linear guide combination in orthogonal transmission scenarios can be widely used in CNC machine tools, automated production lines, precision testing equipment and other fields that require two-dimensional linear motion; existing patented technologies of the same industry generally have defects such as large space occupation, single transmission performance and limited assembly accuracy.

[0003] The split installation means that the perpendicularity of the horizontal and vertical guide rails depends on secondary assembly and adjustment, and the error is usually ≥0.02mm / m. After long-term use, vibration can easily cause loosening, and the accuracy will be significantly reduced.

[0004] Modular combination structures are adopted, such as horizontal guide rail sliders and vertical guide rail bases being connected by bolts, and mounting bases being split splices, such as a combined cross guide rail pair disclosed in publication number CN210281370U. These structures have the defect that stress concentration is easily generated at the splice points, and the bolts loosen after long-term use, leading to an increase in transmission clearance.

[0005] Therefore, it is necessary to improve one or more of the problems existing in the above-mentioned related technical solutions.

[0006] It should be noted that this section is intended to provide background or context for the technical solutions of this utility model as set forth in the claims. The description herein does not constitute an admission that it is prior art simply because it is included in this section. Utility Model Content

[0007] The purpose of this utility model embodiment is to provide a cross-shaped linear guide rail, thereby overcoming at least to some extent one or more problems caused by the limitations and defects of related technologies.

[0008] This utility model embodiment provides a cross-shaped linear guide rail, comprising:

[0009] A cross slider has a first mounting groove on its top surface and a second mounting groove on its bottom surface. The central axis of the first mounting groove is perpendicular to the central axis of the second mounting groove. A first arc groove is provided on the inner side of the second mounting groove. A ball channel is provided on the side wall of the second mounting groove along the length of the first arc groove. Rotation devices are provided at both ends of the second mounting groove to facilitate the ball to circulate between the first arc groove and the ball channel.

[0010] The first guide rail has a second arc groove on both sides, and the first guide rail is slidably connected to the cross slider by ball bearings disposed between the first arc groove and the second arc groove.

[0011] The second guide rail includes:

[0012] Two cross rails are respectively disposed on the inner wall of the first mounting groove, and the sides of the two cross rails are respectively provided with first sliding grooves.

[0013] The intermediate guide rail has a second sliding groove on both sides and is disposed between the two intersecting guide rails.

[0014] A retainer is disposed between the first slide groove and the second slide groove, and rolling elements are arranged in a cross pattern along the length of the retainer;

[0015] The first guide rail and the second guide rail form an orthogonal transmission unit.

[0016] In one embodiment of this utility model, the rotary device includes:

[0017] A rotary device is provided at both ends of the second mounting groove. One side of the rotary device is provided with a corresponding arc groove so that the ball can circulate between the first arc groove and the ball channel through the rotary device.

[0018] A rotary plate is disposed between the end of the second mounting groove and the rotary device. One side of the rotary plate has a shape adapted to the arc groove and forms a ball bearing rotation channel with the arc groove. The other side of the rotary plate is attached to and fixedly connected to the end of the second mounting groove.

[0019] In one embodiment of this utility model, a dustproof plate is provided on the other side of the rotary device.

[0020] In one embodiment of this utility model, the rolling element is a roller, and the rollers are arranged in a 90° cross pattern.

[0021] In one embodiment of this utility model, both the first slide groove and the second slide groove are V-shaped slide grooves.

[0022] In one embodiment of this utility model, both ends of the first slide groove and the second slide groove are provided with limiting end screws.

[0023] In one embodiment of the present invention, the bottom of the first mounting groove is provided with a first mounting hole, the cross guide rail is provided with a vertical first stepped hole, and the cross guide rail is connected to the first mounting hole through the first connecting member to set the cross guide rail on the inner wall of the first mounting groove.

[0024] In one embodiment of this utility model, the first guide rail is provided with a second stepped hole for connecting screws.

[0025] In one embodiment of this utility model, the cross slider is made of 42CrMo steel, and the cross slider has a hardness greater than or equal to 45HRC after quenching treatment.

[0026] In one embodiment of this utility model, the central axis of the first mounting groove is perpendicular to the central axis of the second mounting groove, and the perpendicularity is less than or equal to 0.005 mm / m.

[0027] The technical solution provided by one embodiment of this utility model may include the following beneficial effects:

[0028] This utility model provides a cross-shaped linear guide. On the one hand, by using an integrated cross slider and setting the second guide as a three-piece cross roller guide, the installation height of the cross-shaped linear guide can be minimized, making it suitable for space-constrained scenarios. On the other hand, the point contact characteristics of the cross roller guide can eliminate gaps, and combined with the high guiding accuracy of the first guide, it meets the requirements of precision machining. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0030] Figure 1 This diagram illustrates the cross-shaped linear guide rail structure in an exemplary embodiment of the present invention.

[0031] Figure 2 This diagram illustrates the cross slider structure in an exemplary embodiment of the present invention.

[0032] Figure 3 This diagram shows a schematic of the first guide rail structure in an exemplary embodiment of the present invention.

[0033] Figure 4 This diagram shows a schematic of the second guide rail structure in an exemplary embodiment of the present invention.

[0034] Figure 5 This diagram illustrates the structure of the rotary device in an exemplary embodiment of the present invention.

[0035] Figure 6 This diagram shows a schematic representation of the rotary device structure in an exemplary embodiment of the present invention.

[0036] Figure 7 This diagram illustrates the rotating plate structure in an exemplary embodiment of the present invention.

[0037] Figure 8 This diagram illustrates the structure of the dustproof plate in an exemplary embodiment of the present invention.

[0038] Reference numerals: 100, cross slider; 101, first mounting groove; 102, second mounting groove; 103, first arc groove; 104, ball bearing channel; 200, first guide rail; 201, second arc groove; 202, second stepped hole; 300, second guide rail; 301, cross guide rail; 302, intermediate guide rail; 303, first stepped hole; 400, rotating device; 401, rotating plate; 402, rotator; 403, arc groove; 500, dustproof plate. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0040] Furthermore, the accompanying drawings are merely illustrative diagrams of embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0041] This example implementation provides a cross-shaped linear guide rail, see reference. Figures 1-4 As shown, the cross-shaped linear guide rail may include: a cross slider 100, a first guide rail 200, and a second guide rail 300.

[0042] Among them, such as Figures 1-2As shown, the top surface of the cross slider 100 is provided with a first mounting groove 101, and the bottom surface of the cross slider 100 is provided with a second mounting groove 102. The central axis of the first mounting groove 101 is perpendicular to the central axis of the second mounting groove 102. The inner side of the second mounting groove 102 is provided with a first arc groove 103. A ball channel 104 is provided on the side wall of the second mounting groove 102 along the length direction of the first arc groove 103. Rotation devices 400 are provided at both ends of the second mounting groove 102. The rotation devices 400 facilitate the ball to circulate between the first arc groove 103 and the ball channel 104.

[0043] like Figure 1 , Figure 3 As shown, the first guide rail 200 has a second arc groove 201 on both sides. The first guide rail 200 is slidably connected to the cross slider 100 by ball bearings disposed between the first arc groove 103 and the second arc groove 201.

[0044] like Figure 1 , Figure 4 As shown, the second guide rail 300 includes:

[0045] Cross guide rails 301, two cross guide rails 301 are respectively disposed on the inner wall of the first mounting groove 101, and the sides of the two cross guide rails 301 are respectively provided with first sliding grooves;

[0046] The intermediate guide rail 302 is provided with a second sliding groove on both sides, and the intermediate guide rail 302 is disposed between the two intersecting guide rails 301.

[0047] A retainer is disposed between the first slide groove and the second slide groove, and rolling elements are arranged in a cross pattern along the length of the retainer;

[0048] The first guide rail 200 and the second guide rail 300 form an orthogonal transmission unit.

[0049] The aforementioned cross-shaped linear guide has several advantages. Firstly, by using an integrated cross slider 100 and setting the second guide rail 300 as a three-piece cross roller guide, the installation height of the cross-shaped linear guide can be minimized, making it suitable for space-constrained scenarios. Secondly, the point contact characteristics of the cross roller guide can eliminate gaps, and combined with the high guiding accuracy of the first guide rail 200, it meets the requirements of precision machining.

[0050] The following will refer to Figures 1 to 8 The various parts of the cross-shaped linear guide described in this example embodiment will be explained in more detail.

[0051] In one embodiment, such as Figure 5 As shown, the rotary device 400 includes:

[0052] like Figure 6 As shown, the rotary device 402 is disposed at both ends of the second mounting groove 102. One side of the rotary device 402 is provided with a corresponding arc groove 403 so that the ball can circulate between the first arc groove 103 and the ball channel 104 through the rotary device 402.

[0053] like Figure 7 As shown, a rotating plate 401 is disposed between the end of the second mounting groove 102 and the rotator 402. One side of the rotating plate 401 has a shape adapted to the arc groove 403, forming a ball bearing rotation channel with the arc groove 403. The other side of the rotating plate 401 is attached to and fixedly connected to the end of the second mounting groove 102. It should be understood that both the end of the second mounting groove 102 and the rotating plate 401 are provided with positioning holes, and a positioning post is provided above the arc groove 403 of the rotator 402. Through the cooperation of the positioning post and the positioning hole, the ball bearing rotation channel connects the ball bearing channel 104 on the side wall of the second mounting groove 102 with the first arc groove 103, and allows the ball bearing to roll and rotate more smoothly.

[0054] It should also be understood that multiple cross sliders 100 are spaced apart on the first guide rail 200, and a second guide rail 300 is provided on the first mounting groove 101 of each cross slider 100.

[0055] In one embodiment, such as Figure 8 As shown, a dustproof plate 500 is provided on the other side of the rotary device 402. It should be understood that the end of the second mounting groove 102 is provided with a threaded hole. The rotary device 402, the rotating plate 401, and the dustproof plate 500 are all provided with second mounting holes. The dustproof plate 500, the rotary device 402, and the rotating plate 401 are sequentially connected to the threaded hole at the end of the second mounting groove 102 via second connecting members, thus fixing the rotary device 402, the rotating plate 401, and the dustproof plate 500 to the end of the second mounting groove 102. Furthermore, the dustproof plate 500 prevents cutting fluid, metal shavings, dust, and other foreign objects from entering the ball circulation channel, avoiding wear on the ball and guide rail surfaces; it also reduces maintenance points and lowers maintenance frequency.

[0056] In one embodiment, the rolling elements are rollers arranged in a 90° cross pattern. It should be understood that the 90° cross-arrangement of the rollers eliminates transmission backlash; the contact surfaces between the rollers and the guide rail are heat-treated to increase the hardness to ≥58HRC, improving resistance to deformation. The anti-overturning moment is increased compared to traditional structures, and the rated dynamic load in the vertical direction is increased, making it suitable for heavy-duty scenarios such as machine tool cutting. It should also be understood that the specific structure of the cage is not limited here, but it must be positioned between the first and second slide grooves, and the rolling elements must be arranged in a cross pattern along the length of the cage; the cage ensures uniform roller arrangement, avoids localized overload, and improves fatigue life by more than 2 times compared to a split structure.

[0057] In one embodiment, both the first and second slides are V-shaped slides. It is important to understand that the inclined surface of the V-shaped slide provides a stable rolling track for the roller, limiting lateral roller offset and ensuring motion accuracy. The constraint effect of the V-shaped slide reduces roller motion deviation, and combined with the high-precision machining of the cross slide 100, the overall transmission accuracy is improved.

[0058] In one embodiment, both ends of the first and second slides are provided with limiting end screws. It should be understood that the limiting end screws at both ends of the first and second slides limit the travel range of the intermediate guide rail 302. The limiting end screws physically block the movement of the slider or guide rail, preventing mechanical failures such as ball joint slippage or roller jamming. This avoids structural damage caused by uncontrolled movement and improves the safety of automated equipment.

[0059] In one embodiment, the bottom of the first mounting groove 101 is provided with a first mounting hole, and the cross guide rail 301 is provided with a vertical first stepped hole 303. The cross guide rail 301 is connected to the first mounting hole through the first stepped hole 303 via a first connector, thereby setting the cross guide rail 301 on the inner wall of the first mounting groove 101. It should be understood that the first mounting groove 101 has a mounting hole at its bottom, and the cross guide rail 301 has a vertical first stepped hole 303. A connector, such as a screw, passes through the first stepped hole 303 and is fixed to the mounting hole, thus installing the cross guide rail 301 on the inner wall of the first mounting groove 101. The cooperation between the first stepped hole 303 and the mounting hole ensures that the cross guide rail 301 and the cross slider 100 are tightly fixed, effectively transmitting vertical loads; the first stepped hole 303 is designed to accommodate screw heads, preventing protruding surfaces from affecting other components.

[0060] In one embodiment, the first guide rail 200 is provided with a second stepped hole 202 for connecting screws. It should be understood that the first guide rail 200 is provided with the second stepped hole 202 for installing connecting screws to fix the horizontal guide rail to the equipment base or drive device. The screws rigidly connect the first guide rail 200 to external structures, such as machine tool worktables or servo motor bases, ensuring the stability of horizontal movement; the second stepped hole 202 accommodates the screw head, preventing the screw from protruding and affecting the sliding of the cross slider 100.

[0061] In one embodiment, the cross slider 100 is made of 42CrMo steel, and its hardness is greater than or equal to 45HRC after quenching. It should be understood that 42CrMo steel has high strength and high toughness; quenching further improves surface hardness, enhancing its resistance to deformation and wear. Integral quenching eliminates the seams between the split structures, improving deformation resistance compared to traditional stacked guide rails, making it suitable for high-load conditions; improved wear resistance allows it to withstand continuous high-load operation (such as in automotive parts production lines), extending its service life.

[0062] In one embodiment, the central axis of the first mounting groove 101 is perpendicular to the central axis of the second mounting groove 102, and the perpendicularity is less than or equal to 0.005 mm / m. It is important to understand that high-precision machining equipment (such as a five-axis machine tool) ensures the orthogonality of the two mounting grooves, eliminating assembly errors at the source. The perpendicularity error is only 1 / 4 of that of the traditional split structure (traditional ≥0.02 mm / m), meeting the micron-level precision requirements of semiconductor wafer cutting, optical lens grinding, etc.; during assembly adjustment, it avoids precision attenuation caused by vibration, making it suitable for scenarios requiring precision stability (such as precision testing equipment).

[0063] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" in the above description indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0068] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

Claims

1. A cross intersecting linear guide characterized by, include: A cross slider has a first mounting groove on its top surface and a second mounting groove on its bottom surface. The central axis of the first mounting groove is perpendicular to the central axis of the second mounting groove. A first arc groove is provided on the inner side of the second mounting groove. A ball channel is provided on the side wall of the second mounting groove along the length of the first arc groove. Rotation devices are provided at both ends of the second mounting groove to facilitate the ball to circulate between the first arc groove and the ball channel. The first guide rail has a second arc groove on both sides, and the first guide rail is slidably connected to the cross slider by ball bearings disposed between the first arc groove and the second arc groove. The second guide rail includes: Two cross rails are respectively disposed on the inner wall of the first mounting groove, and the sides of the two cross rails are respectively provided with first sliding grooves. The intermediate guide rail has a second sliding groove on both sides and is disposed between the two intersecting guide rails. A retainer is disposed between the first slide groove and the second slide groove, and rolling elements are arranged in a cross pattern along the length of the retainer; The first guide rail and the second guide rail form an orthogonal transmission unit.

2. The cross intersecting linear guide according to claim 1, wherein, The rotary device includes: A rotary device is provided at both ends of the second mounting groove. One side of the rotary device is provided with a corresponding arc groove so that the ball can circulate between the first arc groove and the ball channel through the rotary device. A rotary plate is disposed between the end of the second mounting groove and the rotary device. One side of the rotary plate has a shape adapted to the arc groove and forms a ball bearing rotation channel with the arc groove. The other side of the rotary plate is attached to and fixedly connected to the end of the second mounting groove.

3. The cross intersecting linear guide according to claim 2, wherein, The rotary device is equipped with a dustproof plate on the other side.

4. The cross-shaped linear guide rail according to claim 1, characterized in that, The rolling element is a roller, and the rollers are arranged in a 90° cross pattern.

5. The cross-shaped linear guide rail according to claim 1, characterized in that, Both the first and second slides are V-shaped slides.

6. The cross-shaped linear guide rail according to claim 1, characterized in that, Both ends of the first and second slides are provided with limiting end screws.

7. The cross-shaped linear guide rail according to claim 1, characterized in that, The bottom of the first mounting groove is provided with a first mounting hole, and the cross guide rail is provided with a vertical first stepped hole. The cross guide rail is connected to the first mounting hole through the first connected member and is set on the inner wall of the first mounting groove.

8. The cross-shaped linear guide rail according to claim 1, characterized in that, The first guide rail is provided with a second stepped hole for connecting screws.

9. The cross-shaped linear guide rail according to claim 1, characterized in that, The cross slider is made of 42CrMo steel, and its hardness is greater than or equal to 45HRC after quenching.

10. The cross-shaped linear guide rail according to claim 1, characterized in that, The central axis of the first mounting groove is perpendicular to the central axis of the second mounting groove, and the perpendicularity is less than or equal to 0.005 mm / m.

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