Automatic compensation type 3D printer wire feeding mechanism

Abstract

The utility model relates to the technical field of 3D printing, and particularly discloses an automatic compensation type 3D printer wire feeding mechanism which comprises a bottom frame, rolling wheels are rotationally connected to the two sides of the interior of the bottom frame, a material disc is arranged above the two rolling wheels, a driving assembly used for driving the rolling wheels to rotate is arranged in the bottom frame, and a mounting frame is fixedly connected to the right side of the bottom frame. A lifting assembly is arranged in the mounting frame and comprises guide rods fixedly connected to the front end and the rear end in the mounting frame, the two guide rods are jointly slidably connected with a sliding frame, a penetrating ring is fixedly connected to the top of the sliding frame, and a distance sensor is fixedly connected to the top of the sliding frame. And certain tension is kept, wire feeding is stable, and the final printing quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing technical field especially, it relates to a kind of automatic compensation formula 3D printer wire feeding mechanism. BACKGROUND

[0002] The main function of wire feeder is to send 3D printing wire material (such as PLA, ABS, etc.) into the nozzle of the printer in a stable and continuous manner. During printing, it needs to accurately control the amount and speed of wire feeding to ensure printing quality.

[0003] The traditional wire feeding mechanism winds the 3D printing wire material around the rotating tray during wire feeding. During 3D printing, the 3D printer pulls the 3D printing wire material, causing the tray to rotate and automatically feed the wire. However, when the 3D printer pulls the 3D printing wire material, it can cause the tray to rotate excessively, affecting the tension of the 3D printing wire material and leading to unstable wire feeding, which further affects the quality of the final printing. SUMMARY

[0004] The utility model aims to provide an automatic compensation formula 3D printer wire feeding mechanism that can ensure the 3D printing wire material is in a taut state during printing, maintaining a certain tension and making the wire feeding more stable to improve the quality of the final printing and solve the problems mentioned in the background.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an automatic compensation formula 3D printer wire feeding mechanism includes a chassis, two rollers are rotatably connected to the inside of the chassis, a tray is provided above the two rollers, a drive assembly is provided inside the chassis to drive the rollers to rotate, a mounting bracket is fixedly connected to the right side of the chassis, a lifting assembly is provided inside the mounting bracket, the lifting assembly includes guide rods fixedly connected to the front and rear ends of the mounting bracket inside, a sliding bracket is slidably connected to the two guide rods, a ring is fixedly connected to the top of the sliding bracket, and a distance sensor is fixedly connected to the top of the sliding bracket.

[0006] Preferably, the drive assembly includes a motor fixedly connected to the front end of the chassis, a first sprocket is fixedly connected to the output shaft of the motor through the chassis, and a second sprocket is fixedly connected to the front end of the outer wall of each roller.

[0007] Preferably, a chain is transmissionally connected between the first sprocket and the two second sprockets.

[0008] Preferably, an anti-slip ring is fixedly connected to the front and rear ends of the outer wall of the roller.

[0009] Preferably, the inside of the mounting frame is provided with a compensation assembly for compensating tension, the compensation assembly comprising two rotating shafts rotatingly connected in the inside of the mounting frame, and an adjusting shaft being arranged below the two rotating shafts.

[0010] Preferably, the front and rear ends of the adjusting shaft are both rotatingly connected with sliding blocks, and the sliding blocks are slidingly connected with the inside of the mounting frame.

[0011] Preferably, the compensation assembly further comprises an electric telescopic rod fixedly connected to the bottom of the inside of the mounting frame, an output shaft of the electric telescopic rod being fixedly connected with a rotating block, and the rotating block being rotatingly connected with the adjusting shaft.

[0012] Preferably, a pressure sensor is fixedly mounted to the bottom of the inside of the mounting frame.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. By the action of the lifting assembly, the 3D printing wire is kept in a taut state during printing, so that a certain tension is maintained, the wire feeding is more stable, and the final printing quality is improved.

[0015] 2. By the action of the compensation assembly, the printing wire is taut, a certain tension is maintained, the tension is self-compensated, and the final printing quality is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 is a schematic view of the overall structure of the present application;

[0018] Figure 2 is a schematic view of the half-section structure of the present application;

[0019] Figure 3 is a schematic view of the local structure of the driving assembly of the present application;

[0020] Figure 4 is a schematic view of the half-section structure of the mounting frame of the present application;

[0021] Figure 5 is a schematic view of the local structure of the sliding block of the present application.

[0022] Explanation of reference signs:

[0023] 1, chassis; 2, roller; 3, tray; 4, drive assembly; 41, motor; 42, first sprocket; 43, second sprocket; 44, chain; 45, anti-skid ring; 5, mounting bracket; 6, lifting assembly; 61, guide rod; 62, sliding bracket; 63, through ring; 64, distance sensor; 7, compensation assembly; 71, rotating shaft; 72, adjusting shaft; 73, sliding block; 74, electric telescopic rod; 75, rotating block; 8, pressure sensor. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1 to 4 The utility model provides a kind of technical scheme: an automatic compensation formula 3D printer wire feeding mechanism, including chassis 1, the inside both sides of chassis 1 are rotationally connected with roller 2, the above of two rollers 2 are provided with tray 3, the inside of chassis 1 is provided with the drive assembly 4 for driving roller 2 rotation, the right side of chassis 1 is fixedly connected with mounting bracket 5, the inside of mounting bracket 5 is provided with lifting assembly 6, lifting assembly 6 includes the guide rod 61 of fixedly connected in the front and rear ends of the inside of mounting bracket 5, two guide rods 61 are slidably connected with sliding bracket 62, the top of sliding bracket 62 is fixedly connected with through ring 63, the top of sliding bracket 62 is fixedly connected with distance sensor 64, drive assembly 4 includes the motor 41 of fixedly connected in the front end of chassis 1, the output shaft of motor 41 is fixedly connected with the first sprocket 42 passing through chassis 1, the outer wall front end of two rollers 2 is fixedly connected with the second sprocket 43, the first sprocket 42 and two second sprockets 43 are all transmissionally connected with chain 44, the outer wall of roller 2 is fixedly connected with anti-skid ring 45 at the front and rear end position of tray 3.

[0026] By adopting the above technical scheme, sliding bracket 62 itself has certain gravity, when using, 3D printing wire is wound and installed on tray 3, then the end of 3D printing wire wound from through ring 63 and extends to the outside 3D printing in the upper direction, the components in the printer pull 3D printing wire, as the consumption of 3D printing wire, printing wire will exert tension on sliding bracket 62, so that sliding bracket 62 moves upward along guide rod 61, ensure that 3D printing wire is in the state of tension during printing, so that it maintains certain tension, so that wire feeding is more stable, improve the quality of final printing.

[0027] When the sliding frame 62 moves close to the top of the mounting frame 5, the distance sensor 64 detects the change of distance, transmits the signal to the peripheral controller, so that the output shaft of the motor 41 rotates with the first sprocket 42, under the action of the transmission connection between the first sprocket 42 and the two second sprockets 43 and the chain 44, the second sprocket 43 rotates, so that the two drive rollers 2 rotate, thereby making the material disc 3 rotate to discharge material, realizing timely discharging.

[0028] The anti-skid ring 45 has the effect of preventing skidding, reducing the situation that the roller 2 rotates the material disc 3 to slip, and avoiding the slip between the material disc 3 and the roller 2 when the printing wire is pulled.

[0029] Specifically, as shown in Figures 2 to 5 The inside of the mounting frame 5 is provided with a compensation assembly 7 for compensating the tension, the compensation assembly 7 includes two rotating shafts 71 rotatingly connected in the inside of the mounting frame 5, an adjusting shaft 72 is arranged below the two rotating shafts 71, the front and rear ends of the adjusting shaft 72 are both rotatingly connected with a sliding block 73, the sliding block 73 is slidingly connected with the inside of the mounting frame 5, the compensation assembly 7 further includes an electric telescopic rod 74 fixedly connected to the inside bottom of the mounting frame 5, the output shaft of the electric telescopic rod 74 is fixedly connected with a rotating block 75, the rotating block 75 is rotatingly connected with the adjusting shaft 72, and the inside bottom of the mounting frame 5 is fixedly installed with a pressure sensor 8.

[0030] By adopting the above technical scheme, the end of the 3D printing wire is passed through the ring 63, and the printing wire is wound from above the rotating shaft 71 and from below the adjusting shaft 72.

[0031] When the output shaft of the motor 41 rotates to feed the wire, until the bottom of the sliding frame 62 contacts the pressure sensor 8, the pressure sensor 8 detects the pressure drop signal provided by the sliding frame 62 and transmits it to the peripheral controller, at which time the motor 41 is controlled to stop rotating, at which time the printing wire may be loose, and the controller controls the output shaft of the electric telescopic rod 74 to retract, so that the rotating block 75 moves downward with the adjusting shaft 72 and the sliding block 73, changing the height difference between the rotating shaft 71 and the adjusting shaft 72, which is conducive to tightening the printing wire and maintaining a certain tension, realizing self-compensation of the tension, and further improving the final printing quality.

[0032] With the continuation of printing, when the bottom of the sliding frame 62 moves away from the pressure sensor 8, the pressure sensor 8 transmits a signal to the controller, and the output shaft of the electric telescopic rod 74 is slowly extended.

[0033] Working principle: the end of the 3D printing wire is passed through the ring 63, and the printing wire is wound from above the rotating shaft 71 and from below the adjusting shaft 72.

[0034] The component in the printer pulls the 3D printing wire, and as the 3D printing wire is consumed, the 3D printing wire exerts a pulling force on the sliding frame 62, so that the sliding frame 62 moves upward along the guide rod 61, ensuring that the 3D printing wire is in a taut state during printing, so that it maintains a certain tension, so that the wire feeding is more stable, and the final printing quality is improved. When the sliding frame 62 moves close to the top of the mounting frame 5, the distance sensor 64 detects the change in distance and transmits a signal to the peripheral controller, so that the output shaft of the motor 41 rotates with the first sprocket 42. Under the action of the transmission connection between the first sprocket 42 and the two second sprockets 43 and the chain 44, the second sprockets 43 rotate, so that the two drive rollers 2 rotate, thereby making the material disc 3 rotate to feed, realizing timely feeding.

[0035] When the output shaft of the motor 41 rotates to feed the wire, until the bottom of the sliding frame 62 contacts the pressure sensor 8, the pressure sensor 8 detects the pressure provided by the sliding frame 62 and transmits a pressure drop signal to the peripheral controller. At this time, the motor 41 is controlled to stop rotating, at this time, the printing wire may be loose, and the controller controls the output shaft of the electric telescopic rod 74 to retract, so that the rotating block 75 moves downward with the adjusting shaft 72 and the sliding block 73, changing the height difference between the rotating shaft 71 and the adjusting shaft 72. This is conducive to making the printing wire taut, maintaining a certain tension, realizing self-compensation of tension, and further improving the final printing quality.

[0036] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An auto-compensating 3D printer filament feeding mechanism comprising a chassis (1), characterized in that: Both sides of the bottom frame (1) are rotatably connected with rollers (2), and above the two rollers (2) is provided with a tray (3), and the inside of the bottom frame (1) is provided with a drive assembly (4) for driving the rollers (2) to rotate; The right side of the bottom frame (1) is fixedly connected with a mounting rack (5), and the inside of the mounting rack (5) is provided with a lifting assembly (6), and the lifting assembly (6) comprises guide rods (61) fixedly connected to the front and rear ends of the inside of the mounting rack (5), and the two guide rods (61) are commonly connected with a sliding rack (62) in sliding mode, and the top of the sliding rack (62) is fixedly connected with a through ring (63), and the top of the sliding rack (62) is fixedly connected with a distance sensor (64).

2. The automatic compensation type 3D printer filament feeding mechanism according to claim 1, characterized in that: The drive assembly (4) comprises a motor (41) fixedly connected to the front end of the bottom frame (1), and the output shaft of the motor (41) is fixedly connected with a first chain wheel (42) penetrating through the bottom frame (1), and the outer wall of the two rollers (2) is fixedly connected with a second chain wheel (43) at the front end.

3. The automatic compensation type 3D printer filament feeding mechanism according to claim 2, characterized in that: The first chain wheel (42) and the two second chain wheels (43) are transmissionally connected with a chain (44).

4. The automatic compensation type 3D printer filament feeding mechanism according to claim 3, characterized in that: The outer wall of the roller (2) is fixedly connected with an anti-skid ring (45) at the front and rear ends of the tray (3).

5. The automatic compensation type 3D printer filament feeding mechanism according to claim 4, characterized in that: The inside of the mounting rack (5) is provided with a compensation assembly (7) for compensating tension, and the compensation assembly (7) comprises two rotating shafts (71) rotatably connected to the inside of the mounting rack (5), and an adjusting shaft (72) is arranged below the two rotating shafts (71).

6. The automatic compensation type 3D printer filament feeding mechanism according to claim 5, characterized in that: The front and rear ends of the adjusting shaft (72) are rotatably connected with sliding blocks (73), and the sliding blocks (73) are slidably connected with the inside of the mounting rack (5).

7. The automatic compensation type 3D printer filament feeding mechanism according to claim 6, characterized in that: The compensation assembly (7) further comprises an electric telescopic rod (74) fixedly connected to the inside bottom of the mounting rack (5), and the output shaft of the electric telescopic rod (74) is fixedly connected with a rotating block (75), and the rotating block (75) is rotatably connected with the adjusting shaft (72).

8. The automatic compensation type 3D printer filament feeding mechanism according to claim 7, characterized in that: The inside bottom of the mounting rack (5) is fixedly provided with a pressure sensor (8).

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