Novel scraper driving structure of 3D printer

Abstract

The utility model discloses a novel scraper driving structure of a 3D printer. The novel scraper driving structure comprises a scraper assembly, the two ends of the scraper assembly are in bolted connection with the hanging plates respectively; the upper part of the hanging plate is hung at one end of the belt connecting plate; the lower part of the other end of the belt connecting plate is connected with the sliding block; the upper end of the belt connecting plate is connected with a belt pressing block through a bolt, and a belt is clamped between the belt connecting plate and the belt pressing block. The lower end of the sliding block is slidably connected to the guide rail. The lower ends of the guide rails are connected with guide rail fixing plates; the lower end of the guide rail fixing plate is fixedly connected with the upper surface of a forming chamber bottom plate of the 3D printer, and the two ends of the guide rail fixing plate are connected with a driving wheel seat and a driven wheel seat correspondingly. The driving wheel seat and the driven wheel seat are respectively provided with a rotatable driving belt wheel and a rotatable driven belt wheel; and the belt is wound between the driving belt wheel and the driven belt wheel. The scraper is convenient to replace or adjust, and the efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing equipment technology, and in particular relates to a novel scraper drive structure for 3D printers. Background Technology

[0002] SLM (Surface Mount Technology) metal 3D printing equipment uses a high-energy laser beam to melt metal alloy powder on the two-dimensional cross-section of a product's three-dimensional model after slicing it into layers, printing complex metal parts layer by layer from bottom to top. In the field of additive manufacturing, the scraper module plays a crucial role. In the printing equipment, the scraper module is used to spread the powder evenly on the printing platform. The scraper drive structure automates the reciprocating motion of the scraper module. Existing scraper drive structures are side-mounted drive structures, as shown in patents with publication numbers CN 221717843 U and CN 210336919 U. The problem is that the scraper needs to be leveled during assembly, but the limited space in the forming chamber makes leveling difficult for workers, and the structure suffers from poor stability, resulting in inefficient, time-consuming, and labor-intensive scraper leveling. Utility Model Content

[0003] The purpose of this invention is to provide a novel scraper drive structure for 3D printers, which fixes the guide rail module on the bottom plate of the forming chamber. The installation and adjustment parts of the scraper assembly are located in the middle of the forming chamber, making it convenient and efficient to replace or adjust the scraper. Furthermore, the scraper mechanism reciprocates by using a drive motor belt drive, ensuring the stability and reliability of the scraper drive.

[0004] To achieve the above objectives, the technical solution of this utility model is to provide a novel scraper drive structure for a 3D printer, including a scraper assembly; both ends of the scraper assembly are bolted to a mounting plate; the upper part of the mounting plate is attached to one end of a belt connecting plate; the lower part of the other end of the belt connecting plate is connected to a slider; the upper part of the belt connecting plate is bolted to a belt pressure block, and the belt is clamped between the belt connecting plate and the belt pressure block to fix the belt connecting plate and the belt together; the lower end of the slider is slidably connected to a guide rail; the lower end of the guide rail is connected to a guide rail fixing plate; the lower end of the guide rail fixing plate is fixedly connected to the upper surface of the molding chamber bottom plate of the 3D printer, and its two ends are respectively connected to a drive wheel seat and a driven wheel seat; the drive wheel seat and the driven wheel seat are respectively provided with a rotatable drive pulley and a driven pulley; the belt winds between the drive pulley and the driven pulley; a connecting shaft is connected between the two drive pulleys; a drive motor assembly is fixedly connected to the outside of one of the drive wheel seats, and its output shaft is drivenly connected to the connecting shaft.

[0005] As a further optimization, the upper end of the belt connecting plate is provided with a groove, and the belt is embedded in the groove; the lower end of the belt pressure block is provided with a protrusion; the protrusion is inserted into the groove, and its lower end presses against the belt.

[0006] As a further optimization, the lower end of the guide rail fixing plate is fixedly connected to a guide rail support block, and the guide rail support block is fixedly connected to the upper surface of the bottom plate of the molding chamber.

[0007] As a further optimization, the belt is a toothed belt, and both the driving pulley and the driven pulley are toothed pulleys.

[0008] As a further optimization, the belt connecting plate and the mounting plate are connected by bolts.

[0009] As a further optimization, the drive motor assembly includes a drive motor, a reducer, and a reducer mounting base; the drive motor is fixedly connected to the reducer, and its output shaft is drivenly connected to the input shaft of the reducer; the reducer is fixedly connected to the reducer mounting base, and its output shaft passes through a preset through hole in the reducer mounting base and is drivenly connected to the connecting shaft; the reducer mounting base is fixedly connected to the outside of the drive wheel seat.

[0010] Compared with the prior art, this utility model fixes the guide rail module on the bottom plate of the molding chamber, and the disassembly and assembly parts of the scraper assembly are all located in the middle of the molding chamber, making it convenient and efficient to replace or adjust the scraper; and it uses the belt drive of the drive motor to realize the reciprocating motion of the scraper mechanism, ensuring the stability and reliability of the scraper drive. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 This is a schematic diagram of the planar side view structure of this utility model;

[0013] Figure 3 for Figure 1 A magnified view of a portion of the image.

[0014] Explanation of the reference numerals: 1 is the scraper assembly; 2 is the mounting plate; 3 is the belt connecting plate; 31 is the belt pressure block; 32 is the groove; 4 is the belt; 41 is the drive wheel seat; 42 is the driven wheel seat; 43 is the connecting shaft; 44 is the drive motor; 45 is the reducer; 46 is the reducer mounting base; 5 is the guide rail; 51 is the slider; 52 is the guide rail fixing plate; 53 is the guide rail support block; 6 is the forming chamber bottom plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-3 As shown, this utility model discloses a novel scraper drive structure for a 3D printer, comprising a scraper assembly 1; both ends of the scraper assembly 1 are bolted to a mounting plate 2; the upper part of the mounting plate 2 is attached to one end of a belt connecting plate 3; the lower part of the other end of the belt connecting plate 3 is connected to a slider 51; the upper end of the belt connecting plate 3 is bolted to a belt pressure block 31, and a belt 4 is clamped between the belt connecting plate 3 and the belt pressure block 31 to fix the belt connecting plate 3 and the belt 4 together; the lower end of the slider 51 is slidably connected to a guide rail 5. The lower end of the guide rail 5 is connected to the guide rail fixing plate 52; the lower end of the guide rail fixing plate 52 is connected to the upper surface of the molding chamber base plate 6 of the 3D printer, and its two ends are respectively connected to the driving wheel seat 41 and the driven wheel seat 42; the driving wheel seat 41 and the driven wheel seat 42 are respectively provided with a rotatable driving pulley and a driven pulley; the belt 4 winds between the driving pulley and the driven pulley; a connecting shaft 43 is connected between the two driving pulleys; the drive motor assembly is fixed to the outside of one of the driving wheel seats 41, and its output shaft is drivenly connected to the connecting shaft 43. The scraper assembly 1 is provided with several scraper adjusting bolts, and the flatness of the scraper is adjusted by turning the scraper adjusting bolts.

[0017] During powder spreading, the drive motor assembly rotates the connecting shaft 43, which in turn rotates the drive pulley. The drive pulley then rotates the belt 4. Since the belt 4 is fixedly connected to the belt connecting plate 3, it causes the belt connecting plate 3 to translate. This translation is influenced by the slider 51 and two parallel guide rails 5, causing the two belt connecting plates 3 to translate synchronously. This causes the scraper assembly 1 to scrape the powder on the upper end of the forming chamber bottom plate 6. Therefore, electromagnetically sensitive components such as the drive motor assembly are no longer located on the side of the forming area, but rather away from the printing area. Power is transmitted to the sliding components via the belt 4, thus reducing the impact of metal powder on the drive motor 44. Furthermore, the belt 4, slider 51, and guide rails 5 have good tolerance to metal powder; even if powder splashes occur, the impact on these components is minimal. Consequently, the overall reliability of this device is high, and its service life is long.

[0018] When leveling the scraper, since both ends of the scraper assembly 1 are bolted to a mounting plate 2, the scraper assembly 1 can be removed simply by unbolting the mounting plate 2 from the scraper assembly 1 in the middle of the forming chamber. The removed scraper assembly 1 can then be taken out of the forming chamber, and its flatness can be adjusted outside the forming chamber. This provides ample space and convenient operation. After adjustment, it can be reinstalled inside the forming chamber, thus improving the convenience of adjusting or replacing the scraper, saving time and effort, and increasing efficiency.

[0019] To ensure a more secure connection with the belt 4, the belt connecting plate 3 has a groove 32 at its upper end, into which the belt 4 is embedded. The belt pressure block 31 has a protrusion at its lower end; the protrusion is inserted into the groove 32, and its lower end presses against the belt 4. Furthermore, since the groove 32 is parallel and corresponds to the guide rail 5, it also helps to prevent the belt 4 from shaking, keeping the belt 4 always running on the upper end of the guide rail 5, thus improving the reliability of the belt 4's operation.

[0020] In a preferred embodiment, the lower end of the guide rail fixing plate 52 is fixedly connected to the guide rail support block 53, and the guide rail support block 53 is fixedly connected to the upper surface of the molding chamber bottom plate 6. This allows the guide rail 5 to be suspended in the air, facilitating the cleaning of metal powder on the molding chamber bottom plate 6.

[0021] To achieve more precise control over the movement of the scraper assembly 1, the belt 4 is a toothed belt, and both the driving pulley and the driven pulley are toothed pulleys. The toothed belt and toothed pulleys work together to ensure more precise and stable synchronous operation of the two sliders 51.

[0022] For ease of inspection and replacement, the belt connecting plate 3 and the mounting plate 2 are connected by bolts. The mounting plate 2 is also detachable for convenient maintenance.

[0023] An exemplary drive motor 44 structure includes a drive motor 44, a reducer 45, and a reducer mounting base 46. The drive motor 44 is fixedly connected to the reducer 45, and its output shaft is drivenly connected to the input shaft of the reducer 45. The reducer 45 is fixedly connected to the reducer mounting base 46, and its output shaft passes through a preset through hole in the reducer mounting base 46 and is drivenly connected to the connecting shaft 43. The reducer mounting base 46 is fixedly connected to the outside of the drive wheel seat 41.

[0024] In summary, this utility model fixes the guide rail module 5 on the bottom plate 6 of the molding chamber, and the disassembly and assembly parts of the scraper assembly 1 are all located in the middle of the molding chamber, making it convenient and efficient to replace or adjust the scraper; and the scraper mechanism reciprocates by using the drive motor 44 and belt 4 to ensure the stability and reliability of the scraper drive.

[0025] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A novel scraper drive structure for a 3D printer, comprising a scraper assembly (1); characterized in that: The scraper assembly (1) is bolted to a mounting plate (2) at both ends; the upper part of the mounting plate (2) is attached to one end of the belt connecting plate (3); the lower part of the other end of the belt connecting plate (3) is connected to the slider (51); the upper end of the belt connecting plate (3) is bolted to the belt pressure block (31), and the belt (4) is clamped between the belt connecting plate (3) and the belt pressure block (31) to fix the belt connecting plate (3) and the belt (4) together; The lower end of the slider (51) is slidably connected to the guide rail (5); the lower end of the guide rail (5) is connected to the guide rail fixing plate (52); the lower end of the guide rail fixing plate (52) is fixedly connected to the upper surface of the molding chamber bottom plate (6) of the 3D printer, and its two ends are respectively connected to the active wheel seat (41) and the driven wheel seat (42); the active wheel seat (41) and the driven wheel seat (42) are respectively provided with a rotatable active pulley and a driven pulley; the belt (4) winds between the active pulley and the driven pulley; a connecting shaft (43) is connected between the two active pulleys; the drive motor assembly is fixedly connected to the outside of one of the active wheel seats (41), and its output shaft is connected to the connecting shaft (43) for transmission.

2. The novel scraper drive structure for 3D printers according to claim 1, characterized in that: The belt connecting plate (3) has a groove (32) at its upper end, and the belt (4) is embedded in the groove (32); the belt pressure block (31) has a protrusion at its lower end; the protrusion is inserted into the groove (32), and its lower end presses against the belt (4).

3. The novel scraper drive structure for 3D printers according to claim 1, characterized in that: The lower end of the guide rail fixing plate (52) is fixedly connected to the guide rail support block (53), and the guide rail support block (53) is fixedly connected to the upper surface of the bottom plate (6) of the molding chamber.

4. The novel scraper drive structure for 3D printers according to claim 1, characterized in that: The belt (4) is a toothed belt, and both the driving pulley and the driven pulley are toothed pulleys.

5. The novel scraper drive structure for a 3D printer according to claim 1, characterized in that: The belt connecting plate (3) and the hanging plate (2) are connected by bolts.

6. The novel scraper drive structure for a 3D printer according to claim 1, characterized in that: The drive motor assembly includes a drive motor (44), a reducer (45), and a reducer mounting base (46); the drive motor (44) is fixedly connected to the reducer (45), and its output shaft is drivenly connected to the input shaft of the reducer (45); the reducer (45) is fixedly connected to the reducer mounting base (46), and its output shaft passes through a preset through hole in the reducer mounting base (46) and is drivenly connected to the connecting shaft (43); the reducer mounting base (46) is fixedly connected to the outside of the drive wheel seat (41).

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