Precision linear guides for 3D printing and 3D printers

Abstract

The present invention discloses a precision linear guide for 3D printing and a 3D printer. The precision linear guide for 3D printing includes a slide rail and a slider body. Several first mounting grooves are formed on the slider body. A first shaft corresponding to the first mounting groove is installed on the slider body. The axial hole on each first shaft is matched with at least two first dustproof bearings to form a rolling assembly. The outer side of each rolling assembly is sleeved with a roller. The roller is located in the corresponding first mounting groove. The outer side of the roller contacts the slide rail, and skeleton oil seals are installed at both ends of the roller. The 3D printer includes a precision linear guide for 3D printing. The beneficial effect of the present invention is that the first dustproof bearing and the first shaft roll relative to each other, and the roller outside the first dustproof bearing rolls relative to each other on the slide rail, and skeleton oil seals are installed at both ends of the roller to prevent dust from entering the roller, prevent jamming or blocking, and ensure smoothness when sliding between the slide rail and the slider body.

Description

Technical Field

[0001] The present invention relates to 3D printing technology, in particular to a precision linear guide rail for 3D printing and a 3D printer. Background Art

[0002] The internal environment of a 3D metal printer is high in metal dust and is pressurized. Conventional linear slides and sliders typically utilize a ring-shaped rolling ball assembly that circulates within the slider. The outer edges of the rolling ball assembly contact the rail, and the balls roll along the rail as the slider slides. Because the individual balls in the rolling ball assembly rub against each other, powder can easily accumulate in the mounting grooves of the slider under pressure. Given the slider's size, the small diameter of the steel balls can cause powder to become lodged between the balls, preventing them from rolling and potentially blocking or even blocking the slider, resulting in damage. Summary of the Invention

[0003] The purpose of the present invention is to provide a precision linear guide rail for 3D printing to prevent powder from entering the slider body and to prevent the slider body and the slide rail from getting stuck or stuck.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions.

[0005] A precision linear guide for 3D printing includes a slide rail and a slider body. Several first mounting grooves are formed on the slider body. A first shaft corresponding to the first mounting groove is installed on the slider body. Each axial hole on the first shaft is equipped with at least two first dust-proof bearings to form a rolling assembly. A roller is sleeved on the outside of each rolling assembly. The roller is located in the corresponding first mounting groove. The outside of the roller is in contact with the slide rail, and skeleton oil seals are installed at both ends of the roller.

[0006] The present invention adopts the above-mentioned technical solution, by forming several first mounting grooves on the slider body, the shaft hole on the first shaft of the slider body is matched with at least two first dust-proof bearings to form a rolling assembly, and a roller is sleeved on the outside of each rolling assembly, the bearing is protected by the roller, and the roller is placed in the first mounting groove so that the outer side of the roller contacts the slide rail, so that when the slider slides, the first dust-proof bearing and the first shaft roll relative to each other, and under the action of the first dust-proof bearing, the roller outside the first dust-proof bearing rolls relative to the outer ring of the first dust-proof bearing on the slide rail, thereby improving the smoothness of sliding between the slide rail and the slider body, and skeleton oil seals are installed at both ends of the roller to prevent powder from entering the roller, causing powder to accumulate on the first dust-proof bearing, and powder to accumulate between the first dust-proof bearing and the first shaft, thereby avoiding jamming or blocking, and ensuring the smoothness of sliding between the slide rail and the slider body.

[0007] Preferably, several parallel first through holes are formed on the top of the slider body, the first shaft is installed in the corresponding first through holes, both ends of the first shaft are equipped with first shaft sleeves, and the first shaft sleeves are respectively located at both ends of the first through holes.

[0008] In this way, the first shaft is easily installed by providing the first through hole, and the shaft holes at both ends of the first shaft are matched with first shaft sleeves, and the first shaft is positioned and protected by the first shaft sleeves.

[0009] Preferably, at least two protrusions are formed on the top of the slide rail, and the cross-section of the protrusion is an isosceles trapezoid, which contacts the outer side of the roller through the upper base of the isosceles trapezoid.

[0010] Thus, at least two raised portions are formed on the top of the slide rail, and the cross-section of the raised portions is configured to be an isosceles trapezoid, so that the top angle of the isosceles trapezoid contacts the outside of the roller, reducing the contact area between the roller and the slide rail. The top of the slider body is positioned by the cooperation of the roller and the isosceles trapezoid, so that the top of the slider body and the slide rail do not contact each other, reducing the frictional resistance between the slider and the slide rail and improving the smoothness of sliding. Furthermore, the protruding isosceles trapezoidal structure creates a larger gap between the roller and the slide rail, so that powder on the slide rail will not affect the sliding of the roller, thus preventing the slider and the slide rail from getting stuck or jamming when powder is on the slide rail.

[0011] Preferably, second through holes that are relatively parallel to the first through holes are formed at the lower ends of both sides of the slider body, and the inner shaft hole of the second through hole is matched with a second shaft. The second shaft is formed with two steps at one end close to the slide rail, and a second shaft sleeve is installed on the first step.

[0012] In this way, by forming second through holes parallel to the first through holes at the lower ends of both sides of the slider body, it is convenient to install the second shaft, and two steps are formed at one end of the second shaft close to the slide rail, which facilitates positioning of the second sleeve through the first step.

[0013] Preferably, a second dustproof bearing is mounted on the second step of the second shaft, one end of the inner ring of the second dustproof bearing abuts against the second sleeve, and the other first end abuts against the step of the second shaft.

[0014] In this way, a second dustproof bearing is installed on the second step of the second shaft, and one end of the inner ring of the second dustproof bearing is abutted against the second sleeve, and the other first end is abutted against the step of the second shaft to position the inner ring of the second dustproof bearing, and then axially position the second dustproof bearing.

[0015] Preferably, a second mounting groove is formed on the slider body, the second dustproof bearing is located in the second mounting groove, and a gap is formed between the end of the second dustproof bearing away from the second sleeve and the slider body.

[0016] In this way, a second mounting groove is formed on the slider body, which makes it convenient for the second dust-proof bearing to be located in the second mounting groove, and there is a gap between the end of the second dust-proof bearing away from the second sleeve and the slider body, so that when the slider slides, the powder automatically falls from the slide rail to the gap under the action of gravity and falls out of the slider body.

[0017] Preferably, the outer ring of the second dustproof bearing has an L-shaped cross-section, and the horizontal portion and the vertical portion of the L-shape respectively abut against two adjacent edges of the corners on both sides of the slide rail.

[0018] In this way, the outer ring cross-section of the second dust-proof bearing is L-shaped, and the horizontal and vertical parts of the L-shape are respectively abutted against the adjacent two sides of the corners on both sides of the slide rail, which is convenient for positioning the two sides of the slider, and the outer rings of the two dust-proof bearings are used to replace the slider body to contact and position the slide rail, thereby reducing the friction resistance between the slider and the slide rail and improving the smoothness of sliding.

[0019] Preferably, there is a gap between the inner side of the slider body and the side wall of the slide rail, and the gap, the first mounting groove and the second mounting groove are in communication.

[0020] In this way, the powder that enters the slide rail and the inner side of the slider body from the first mounting groove enters the second mounting groove through the gap under the action of gravity, and then falls outside the slider and the slide rail through the gap between the outer ring end face of the second dust-proof bearing located in the second mounting groove and the slider body, thereby achieving the dust removal effect and ensuring the smoothness of the slider when sliding.

[0021] Preferably, threaded holes are formed on both sides of the slider body, and mounting holes are formed on the limit plate. Bolts pass through the mounting holes and are screwed into the threaded holes to respectively mount the limit plates on both sides of the slider body.

[0022] In this way, by forming threaded holes on both sides of the slider body, forming mounting holes on the limit plates, and screwing bolts through the mounting holes and the threaded holes to install the two limit plates on both sides of the slider body respectively, the first sleeve is limited and dust is prevented from entering the slider body from the first through hole and the second through hole.

[0023] An embodiment of the present invention further provides a 3D printer, comprising the above-mentioned precision linear guide rail for 3D printing.

[0024] The beneficial effect of the present invention is that several first mounting grooves are formed on the slider body, and the shaft hole on the first shaft of the slider body is matched with at least two first dust-proof bearings to form a rolling assembly, and a roller is sleeved on the outside of each rolling assembly, and the bearing is protected by the roller, and the roller is placed in the first mounting groove so that the outside of the roller contacts the slide rail, so that when the slider slides, the first dust-proof bearing and the first shaft roll relative to each other, and under the action of the first dust-proof bearing, the roller outside the first dust-proof bearing rolls relative to the outer ring of the first dust-proof bearing on the slide rail, thereby improving the smoothness of sliding between the slide rail and the slider body, and skeleton oil seals are installed at both ends of the roller to prevent powder from entering the roller, so that powder accumulates on the first dust-proof bearing, and powder accumulates between the first dust-proof bearing and the first shaft, thereby avoiding jamming or stuckness, and ensuring the smoothness of sliding between the slide rail and the slider body. At least two protrusions are formed on the top of the slide rail, and the cross-section of the protrusion is set to be an isosceles trapezoid, so that the top angle of the isosceles trapezoid contacts the outside of the roller, reducing the contact area between the roller and the slide rail, and also making it easier to prevent the top of the slider body from contacting the slide rail, reducing the friction resistance between the slider and the slide rail, improving the smoothness of sliding, and preventing the slider and the slide rail from getting stuck or jammed when dust accumulates on the slide rail through the protruding isosceles trapezoid structure, and positioning the top of the slider body through the cooperation of the roller and the isosceles trapezoid. The slide rail of the present invention has a simple appearance, simple processing technology, a small rolling friction contact surface, reduced friction resistance, and reduced manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the external structure diagram of the present invention;

[0026] Figure 2 This is a structural diagram of the present invention after removing the roller;

[0027] Figure 3 It is a front view of the present invention;

[0028] Figure 4 This invention Figure 3 Cross-sectional view of middle AA;

[0029] Figure 5 This invention Figure 4 Enlarged view of part K in the middle. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0031] The figure marks in the drawings of the specification include: first sleeve 1, first shaft 2, skeleton oil seal 3, first dustproof bearing 4, slider body 5, first mounting groove 51, second mounting groove 52, limit plate 6, second shaft 7, second dustproof bearing 8, outer ring 81, slide rail 9, protrusion 91, second sleeve 10, roller 11, bolt 12.

[0032] Example 1, see Figures 1 to 5 , a precision linear guide for 3D printing, including a slide rail 9 and a slider body 5, wherein several parallel first mounting grooves 51 are formed on the slider body 5, and a first shaft 2 corresponding to the first mounting groove 51 is installed on the slider body 5, and each of the first shafts 2 has an axial hole matched with at least two first dust-proof bearings 4 to form a rolling assembly, and a roller 11 is sleeved on the outside of each rolling assembly, and each roller 11 is located in the corresponding first mounting groove 51, and the outside of each roller 11 is in contact with the slide rail 9, and a skeleton oil seal 3 is installed at both ends of each roller 11.

[0033] Among them, see Figure 4 Several parallel first through holes are formed on the top of the slider body 5, and the first shaft 2 is installed in the corresponding first through hole. Both ends of the first shaft 2 are equipped with first shaft sleeves 1, and the first shaft sleeves 1 are respectively located at both ends of the first through hole.

[0034] See also Figure 1 and Figure 4 At least two protrusions 91 are formed on the top of the slide rail 9. The cross-section of the protrusion 91 is an isosceles trapezoid, and the upper base of the isosceles trapezoid contacts the outer side of the roller 11. In this way, the top angle of the isosceles trapezoid contacts the outer side of the roller 11, reducing the contact area between the roller 11 and the slide rail 9. It also makes it easier to prevent the top of the slider body 5 from contacting the slide rail 9, reducing the friction resistance between the slider and the slide rail 9, and improving the smoothness of sliding. The protruding isosceles trapezoid structure prevents the slider and the slide rail 9 from getting stuck or jammed when powder is on the slide rail 9, and the roller 11 cooperates with the isosceles trapezoid to position the top of the slider body 5.

[0035] See also Figure 4 and Figure 5 The slider body 5 has second through holes formed on both sides of the lower end thereof, which are parallel to the first through holes. The second shaft 7 is fitted with an inner axial hole of the second through hole. The second shaft 7 has two steps formed on the end near the slide rail 9, and the second shaft sleeve 10 is mounted on the first step. Thus, the two steps formed on the end near the slide rail 9 of the second shaft 7 facilitate positioning of the second shaft sleeve 10 via the first step.

[0036] See also Figure 4 and Figure 5A second dustproof bearing 8 is mounted on the second step of the second shaft 7. One end of the inner ring of the second dustproof bearing 8 abuts against the second sleeve 10, while the other first end abuts against the step of the second shaft 7. The inner ring of the second dustproof bearing 8 is positioned by abutting one end of the inner ring against the second sleeve 10 and the other first end against the step of the second shaft 7.

[0037] See also Figure 4 and Figure 5 The slider body 5 is formed with a second mounting groove 52, and the second dustproof bearing 8 is located in the second mounting groove 52. A gap is formed between the end of the second dustproof bearing 8 away from the second sleeve 10 and the slider body 5. This allows the powder to automatically fall from the slide rail 9 into the gap and out of the slider body 5 under the action of gravity when the slider slides.

[0038] See also Figure 4 and Figure 5 The outer ring 81 of the second dustproof bearing 8 has an L-shaped cross-section, with the horizontal and vertical portions of the L-shaped portion respectively abutting against the adjacent edges of the corners on either side of the slide rail 9. This facilitates positioning of the two sides of the slider, and the outer ring 81 of the second dustproof bearing replaces the slider body 5 in contact with the slide rail 9, reducing friction between the slider and the slide rail 9 and improving smoothness during sliding.

[0039] Preferably, a gap is provided between the inner side of the slider body 5 and the sidewall of the slide rail 9, and the gap, the first mounting groove 51, and the second mounting groove 52 are in communication. This allows powder that enters the slide rail 9 and the inner side of the slider body 5 from the first mounting groove 51 to pass through the gap under the action of gravity into the second mounting groove 52, and then fall outside the slider and slide rail 9 through the gap between the end face of the outer ring 81 of the second dustproof bearing 8 located in the second mounting groove 52 and the slider body 5, thereby achieving dust removal and ensuring smooth sliding of the slider.

[0040] See also Figure 1 and Figure 4 Threaded holes are formed on both sides of the slider body 5, and mounting holes are formed on the limit plate 6. Bolts 12 pass through the mounting holes and are screwed into the threaded holes to install the limit plates 6 on both sides of the slider body 5 respectively.

[0041] Example 2, a 3D printer, comprising the above-mentioned precision linear guide rail for 3D printing.

[0042] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Precision linear guide rail for 3D printing, characterized by: The invention comprises a slide rail (9) and a slider body (5), wherein the slider body (5) is formed with a plurality of first mounting grooves (51), and the slider body (5) is provided with a first shaft (2) corresponding to the first mounting groove (51), and each of the first shafts (2) is provided with an axial hole matched with at least two first dustproof bearings (4) to form a rolling assembly, and each of the rolling assemblies is provided with a roller (11) on the outside, and the roller (11) is located in the corresponding first mounting groove (51), and the outer surface of the roller (11) is provided with a roller (11) on the outside. The sides of the roller (11) are in contact with the slide rail (9), and skeleton oil seals (3) are installed at both ends of the roller (11); at least two protrusions (91) are formed on the top of the slide rail (9), and the cross-section of the protrusions (91) is an isosceles trapezoid, and the outer side of the roller (11) is contacted through the upper base of the isosceles trapezoid; the top of the slider body (5) is formed with a plurality of parallel first through holes, and the first shaft (2) is installed in the corresponding first through holes, and the shaft holes at both ends of the first shaft (2) are matched with first shaft sleeves (1) , the first bushings (1) are respectively located at the two ends of the first through hole; the lower ends of both sides of the slider body (5) are formed with second through holes relatively parallel to the first through holes, the inner shaft hole of the second through hole is matched with a second shaft (7), and the second shaft (7) is formed with two steps at one end close to the slide rail (9), and a second bushing (10) is installed on the first step; a second dustproof bearing (8) is installed on the second step of the second shaft (7), and one end of the inner ring of the second dustproof bearing (8) is connected to the second bushing (10), and the other end abuts against the second step of the second shaft (7); a second mounting groove (52) is formed on the slider body (5), the second dustproof bearing (8) is located in the second mounting groove (52), and there is a gap between the end of the second dustproof bearing (8) away from the second sleeve (10) and the slider body (5); there is a gap between the inner side of the slider body (5) and the side wall of the slide rail (9), and the gap, the first mounting groove (51) and the second mounting groove (52) are connected.

2. The precision linear guide rail for 3D printing according to claim 1, characterized in that: The second dustproof bearing (8) is provided with an outer ring (81) with an L-shaped cross section, and the horizontal portion and the vertical portion of the L-shape respectively abut against the adjacent two sides of the corners on both sides of the slide rail (9).

3. The precision linear guide rail for 3D printing according to any one of claims 1 to 2, characterized in that: Threaded holes are formed on both sides of the slider body (5), and a mounting hole is formed on the limit plate (6). Bolts (12) pass through the mounting holes and are screwed into the threaded holes to respectively mount the limit plates (6) on both sides of the slider body (5).

4. A 3D printer, characterized in that: The invention comprises the precision linear guide rail for 3D printing according to any one of claims 1 to 3.

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