Rolling device for 3D printing

Abstract

The utility model provides a 3D printing rolling device which comprises a hollow pressing cylinder, two parallel side faces of the pressing cylinder are fixedly connected with shaft sleeves, the shaft sleeves and the pressing cylinder are concentrically arranged, a shaft rod is inserted in the pressing cylinder, the shaft sleeve is arranged on the shaft rod in a sleeved mode, the length of the shaft rod is larger than that of the pressing cylinder, and the length of the shaft sleeve is larger than that of the pressing cylinder. The outer surface of the shaft sleeve is in threaded connection with a positioning screw used for limiting the relative position of the shaft sleeve and the shaft rod, bearings are arranged at the two ends of the shaft rod in a sleeved mode, and outer rings of the bearings are fixedly connected with the connecting seat.

Description

Technical Field

[0001] The utility model relates to a roller pressing device for 3D printing, belonging to the technical field of 3D printing. Background Art

[0002] 3D printing technology is mainly based on the principle of "additive manufacturing" and is a technology that uses computer control to stack printing materials layer by layer to form and manufacture products. During the printing process of a 3D printer, gaps between two adjacent layers of material often occur between the layers and between the walls, resulting in poor strength of the printed product. At the same time, the problem of excessive layer height is also prone to occur during the printing process, resulting in a large height direction error of the printed product. Therefore, after the material is printed, a pressing cylinder is used to roll the two adjacent layers of material, thereby reducing the gap between the two adjacent layers of material, improving the strength of the printed product, and preventing the occurrence of excessive layer height. The pressing cylinder is usually rotatably installed in a U-shaped frame at the tail of the print head, and the relative position of the pressing cylinder and the U-shaped frame is fixed. In order to enable the pressing cylinder to roll printing materials of different widths, the length of the pressing cylinder is often greater than the thickness of the printed printing material. Therefore, when the pressing cylinder rolls the printed material, there is a situation where the end area of ​​the pressing cylinder is always not in contact with the printing material, and after the middle area of ​​the pressing cylinder is worn out during long-term rolling of the printing material, it is necessary to replace the pressing cylinder in a part of the area that is not used, so that the pressing cylinder is not fully utilized. Therefore, it is necessary to design a 3D printing rolling device that fully utilizes the pressing cylinder. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a roller pressing device for 3D printing to solve the problems raised in the above-mentioned background technology. The present invention makes the relative position between the pressing cylinder and the printing substrate adjustable to achieve full utilization of the pressing cylinder.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a 3D printing roller pressing device, including a hollow pressing cylinder, two parallel side surfaces of the pressing cylinder are connected and fixed with shaft sleeves, the shaft sleeves are arranged concentrically with the pressing cylinder, a shaft rod is inserted in the pressing cylinder, the shaft sleeve is sleeved on the shaft rod, the length of the shaft rod is greater than the length of the pressing cylinder, the outer surface of the shaft sleeve is threadedly connected with a positioning screw for limiting the relative position of the shaft sleeve and the shaft rod, both ends of the shaft rod are sleeved with bearings, and the outer ring of the bearing is connected and fixed to the connecting seat.

[0005] Furthermore, the outer surface of the sleeve is symmetrically provided with two through holes, the inner diameter of the through hole is larger than the outer diameter of the positioning screw rod, a thickened portion is provided on the outer side of the through hole, the thickened portion is connected and fixed to the sleeve, a threaded hole aligned with the through hole is provided on the outer surface of the thickened portion, the positioning screw is threadedly connected in the threaded hole, and one end of the positioning screw passes through the through hole and contacts with the shaft rod.

[0006] Furthermore, the outer sides of the two thickened parts on one of the shaft sleeves are provided with L-shaped connecting plates that fit with the thickened parts, and the ends of the two L-shaped connecting plates away from the thickened parts are respectively connected and fixed to two protective sleeves, and the cross-section of the protective sleeves is semicircular. The two protective sleeves are wrapped on the pressing cylinder, and a small hole aligned with the threaded hole is opened at the part where the L-shaped connecting plate fits with the thickened part, and the positioning screw passes through the small hole and is threadedly connected in the threaded hole.

[0007] Furthermore, both ends of the protective sleeve are connected and fixed with protrusions, the protrusions and the protective sleeve are an integrally formed structure, and one end of the L-shaped connecting plate away from the thickened portion is connected and fixed to the protrusions.

[0008] Furthermore, a circular opening is formed on one side of the connecting seat, and the bearing is installed in the circular opening.

[0009] Furthermore, two parallel side surfaces of the connection seat are connected and fixed with supporting ears, the supporting ears are arranged at one end of the connection seat away from the circular opening, the supporting ears and the connection seat are an integrally formed structure, and a through hole for inserting a screw is opened on one side of the supporting ears.

[0010] Furthermore, a side surface of the connection seat adjacent to the support ear is provided with a plurality of strip-shaped openings, and the plurality of strip-shaped openings are arranged at equal intervals along the length direction of the connection seat.

[0011] Beneficial effects of the utility model:

[0012] 1. The structure formed by the pressing cylinder and the shaft sleeve is set on a shaft rod whose length is greater than that of the pressing cylinder, and the relative position of the shaft sleeve and the shaft rod is limited by a positioning screw. When a certain area of ​​the pressing cylinder is worn due to long-term contact with the printing material, the positioning screw is screwed on and the position of the pressing cylinder is adjusted along the shaft rod so that the unworn area of ​​the pressing cylinder moves to contact the printing material, and then the positioning screw is used to limit the relative position of the shaft sleeve and the shaft rod again, so that the relative position between the pressing cylinder and the printing substrate is adjustable. Because each area of ​​the pressing cylinder will contact and roll with the printing material, the pressing cylinder can be fully utilized.

[0013] 2. Two thickened parts are connected and fixed on the outer surface of the sleeve, and the positioning screws are screwed into the threaded holes on the thickened parts to achieve threaded connection between the positioning screws and the sleeve. At the same time, the thickness of the sleeve where the positioning screws are installed is partially increased without increasing the thickness of the sleeve as a whole, which is beneficial to reducing the production cost of the structure formed by the pressure cylinder and the sleeve.

[0014] 3. Two semicircular protective covers are installed on the pressing cylinder, so that the pressing cylinder does not directly contact the printing material under the protection of the protective covers, which plays a role in protecting the pressing cylinder. When the protective covers are worn, they can be replaced, which is conducive to reducing the cost of replacing wearing parts.

[0015] 4. Align the small hole on the L-shaped connecting plate with the threaded hole on the thickened part, then pass the positioning screw through the small hole and thread it into the threaded hole. The positioning screw limits the relative position of the sleeve and the shaft on the one hand, and limits the relative position of the protective sleeve and the pressure cylinder on the other hand, which is conducive to reducing the use of positioning screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a structural schematic diagram of a 3D printing roller pressing device of the utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 It is a schematic diagram of the assembly of a thickened portion, a sleeve, a shaft rod and a pressing cylinder in a 3D printed roller pressing device of the utility model;

[0020] Figure 4 This is a schematic diagram of the assembly of a shaft sleeve and a pressing cylinder in a 3D printed roller pressing device of the utility model;

[0021] Figure 5 This is a three-dimensional diagram of a thickened portion in a 3D printed roller pressing device of the utility model;

[0022] Figure 6 It is a schematic diagram of the assembly of the protrusion and the protective sleeve in a 3D printed roller pressing device of the utility model;

[0023] Figure 7 This is a three-dimensional diagram of an L-shaped connecting plate in a 3D printed roller pressing device of the utility model;

[0024] Figure 8 This is a three-dimensional diagram of a connecting seat in a 3D printed roller pressing device of the utility model;

[0025] In the figure: 1-pressing cylinder, 2-protective sleeve, 3-connecting seat, 4-strip mouth, 5-support ear, 6-bearing, 7-axis rod, 8-L-type connecting plate, 9-axle sleeve, 10-thickening part, 11-positioning screw, 12-through hole, 13-threaded hole, 14-protrusion, 15-small hole, 16-round mouth. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] See also Figure 1 and Figure 4 The utility model provides a technical solution: a 3D printing roller pressing device, including a hollow pressing cylinder 1, two parallel sides of the pressing cylinder 1 are connected and fixed with shaft sleeves 9, the shaft sleeves 9 are arranged concentrically with the pressing cylinder 1, and the structure formed by the hollow pressing cylinder 1 and the shaft sleeves 9 is conducive to reducing production costs.

[0028] See also Figure 1-Figure 4 , a shaft rod 7 is inserted in the pressing cylinder 1, and a sleeve 9 is sleeved on the shaft rod 7. The length of the shaft rod 7 is greater than the length of the pressing cylinder 1. The outer surface of the sleeve 9 is threadedly connected with a positioning screw 11 for limiting the relative position of the sleeve 9 and the shaft rod 7. The structure formed by the pressing cylinder 1 and the sleeve 9 is sleeved on the shaft rod 7 whose length is greater than the length of the pressing cylinder 1, and the positioning screw 11 is used to limit the relative position of the sleeve 9 and the shaft rod 7. When a certain area of ​​the pressing cylinder 1 is worn due to long-term contact with the printing material, the positioning screw 11 is screwed on, and the position of the pressing cylinder 1 is adjusted along the shaft rod 7 to move the unworn area of ​​the pressing cylinder 1 to contact the printing material, and then the positioning screw 11 is used to limit the relative position of the sleeve 9 and the shaft rod 7 again, so that the relative position between the pressing cylinder 1 and the printing substrate is adjustable. Because each area of ​​the pressing cylinder 1 will contact the printing material and roll with the printing material, the pressing cylinder 1 is fully utilized.

[0029] See also Figure 1 and Figure 8 , bearings 6 are sleeved on both ends of the shaft 7, and the outer ring of the bearing 6 is connected and fixed to the connecting seat 3, wherein a circular opening 16 is opened on one side of the connecting seat 3, so that the bearing 6 is installed in the circular opening 16, and the assembly of the bearing 6 and the connecting seat 3 is completed, and the two parallel side surfaces of the connecting seat 3 are connected and fixed with support ears 5, and the support ears 5 are arranged at the end of the connecting seat 3 away from the circular opening 16, and the support ears 5 and the connecting seat 3 are an integrally formed structure, and a through hole for inserting screws is opened on one side of the support ears 5, and the support ears 5 are installed at the required position of the print head by screws to complete the assembly of the connecting seat 3 and the print head. When the print head moves, it drives the pressure cylinder 1 to move together, and a plurality of strip openings 4 are opened on a side of the connecting seat 3 adjacent to the support ears 5, and the plurality of strip openings 4 are arranged equidistantly along the length direction of the connecting seat 3, and the design of the strip openings 4 reduces the production cost of the connecting seat 3.

[0030] See also Figure 1-Figure 5Two through holes 12 are symmetrically provided on the outer surface of the sleeve 9, and the inner diameter of the through hole 12 is larger than the outer diameter of the rod of the positioning screw 11. A thickened portion 10 is provided on the outer side of the through hole 12, and the thickened portion 10 is connected and fixed to the sleeve 9. A threaded hole 13 aligned with the through hole 12 is provided on the outer surface of the thickened portion 10, and the positioning screw 11 is threadedly connected in the threaded hole 13. One end of the positioning screw 11 passes through the through hole 12 and contacts the shaft rod 7. Two thickened portions 10 are connected and fixed on the outer surface of the sleeve 9, and the positioning screw 11 is screwed into the threaded hole 13 on the thickened portion 10 to realize the threaded connection between the positioning screw 11 and the sleeve 9. At the same time, the thickness of the sleeve 9 where the positioning screw 11 is installed is locally increased, and there is no need to increase the thickness of the sleeve 9 as a whole, which is beneficial to reducing the production cost of the structure formed by the pressure cylinder 1 and the sleeve 9.

[0031] See also Figure 1-Figure 7 , the outer sides of the two thickened parts 10 on a shaft sleeve 9 are both provided with L-shaped connecting plates 8 that fit with the thickened parts 10, and the ends of the two L-shaped connecting plates 8 away from the thickened parts 10 are respectively connected and fixed with the two protective sleeves 2, that is, both ends of the protective sleeve 2 are connected and fixed with protrusions 14, and the protrusions 14 and the protective sleeve 2 are an integrally formed structure, so that the end of the L-shaped connecting plate 8 away from the thickened part 10 is connected and fixed with the protrusions 14, and the protrusions 14 play the role of connecting the L-shaped connecting plate 8 and the protective sleeve 2. The cross-section of the protective sleeve 2 is semicircular, and the two protective sleeves 2 are wrapped on the pressing cylinder 1. The part where the L-shaped connecting plate 8 fits with the thickened part 10 is provided with a small hole 15 aligned with the threaded hole 13, and the positioning screw 11 passes through The small hole 15 is threadedly connected in the threaded hole 13, and two semicircular protective sleeves 2 are sleeved on the pressure cylinder 1. Under the cover of the protective sleeve 2, the pressure cylinder 1 does not directly contact the printing material, thereby protecting the pressure cylinder 1. When the protective sleeve 2 is worn, the protective sleeve 2 can be replaced, which is beneficial to reducing the cost of replacing wearing parts. The small hole 15 on the L-shaped connecting plate 8 is aligned with the threaded hole 13 on the thickened part 10, and then the positioning screw 11 is passed through the small hole 15 and threadedly connected in the threaded hole 13, so that the positioning screw 11 limits the relative position of the sleeve 9 and the shaft rod 7 on the one hand, and limits the relative position of the protective sleeve 2 and the pressure cylinder 1 on the other hand, which is beneficial to reducing the use of the positioning screw 11.

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A 3D printing roller pressing device, comprising a hollow pressing cylinder (1), characterized in that: The two parallel sides of the pressing cylinder (1) are connected and fixed with a shaft sleeve (9), the shaft sleeve (9) and the pressing cylinder (1) are arranged concentrically, a shaft rod (7) is inserted in the pressing cylinder (1), the shaft sleeve (9) is sleeved on the shaft rod (7), the length of the shaft rod (7) is greater than the length of the pressing cylinder (1), the outer surface of the shaft sleeve (9) is threadedly connected with a positioning screw (11) for limiting the relative position of the shaft sleeve (9) and the shaft rod (7), both ends of the shaft rod (7) are sleeved with bearings (6), and the outer ring of the bearing (6) is connected and fixed to the connecting seat (3).

2. A 3D printing roller pressing device according to claim 1, characterized in that: The outer surface of the sleeve (9) is symmetrically provided with two through holes (12), the inner diameter of the through hole (12) is larger than the outer diameter of the rod of the positioning screw (11), a thickened portion (10) is provided on the outer side of the through hole (12), the thickened portion (10) is connected and fixed to the sleeve (9), the outer surface of the thickened portion (10) is provided with a threaded hole (13) aligned with the through hole (12), the positioning screw (11) is threadedly connected in the threaded hole (13), and one end of the positioning screw (11) passes through the through hole (12) and contacts the shaft rod (7).

3. A 3D printing roller pressing device according to claim 2, characterized in that: The outer sides of the two thickened parts (10) on one of the shaft sleeves (9) are each provided with an L-shaped connecting plate (8) that fits with the thickened part (10); the ends of the two L-shaped connecting plates (8) that are away from the thickened part (10) are respectively connected and fixed to two protective sleeves (2); the cross-section of the protective sleeves (2) is semicircular; the two protective sleeves (2) are both wrapped around the pressing cylinder (1); a small hole (15) aligned with the threaded hole (13) is opened at the portion where the L-shaped connecting plate (8) fits with the thickened part (10); the positioning screw (11) passes through the small hole (15) and is threadedly connected in the threaded hole (13).

4. A 3D printing roller pressing device according to claim 3, characterized in that: Both ends of the protective sleeve (2) are connected and fixed with protrusions (14), the protrusions (14) and the protective sleeve (2) are an integrally formed structure, and the end of the L-shaped connecting plate (8) away from the thickened portion (10) is connected and fixed to the protrusions (14).

5. The 3D printing roller pressing device according to claim 1, characterized in that: A circular opening (16) is formed on one side of the connecting seat (3), and the bearing (6) is installed in the circular opening (16).

6. A 3D printing roller pressing device according to claim 5, characterized in that: Two parallel side surfaces of the connection seat (3) are connected and fixed with support ears (5), and the support ears (5) are arranged at an end of the connection seat (3) away from the circular opening (16). The support ears (5) and the connection seat (3) are an integrally formed structure, and a through hole for inserting a screw is opened on one side surface of the support ears (5).

7. A 3D printing roller pressing device according to claim 6, characterized in that: A side surface of the connection seat (3) adjacent to the support ear (5) is provided with a plurality of strip-shaped openings (4), and the plurality of strip-shaped openings (4) are arranged at equal distances along the length direction of the connection seat (3).

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