Auxiliary feeding device of printer

Abstract

The utility model discloses an auxiliary feeding device of a printer, belongs to the technical field of auxiliary tools of printers, and aims to solve the technical problem that wire materials are easy to loosen, wind and knot in the discharging process of a 3D printer in the prior art. The auxiliary feeding device of the printer comprises a mounting arm and a material roll, a shaft rod is transversely and rotationally assembled on one side of the top end of the mounting arm, the shaft rod is sleeved with the material roll, the material roll and the shaft rod can synchronously rotate, and a driven disc coaxially connected with the shaft rod is assembled on the other side of the top end of the mounting arm; a limiting mechanism is arranged at the top end of the mounting arm and comprises a shell arm assembled on one side of the driven disc in the radial direction. According to the auxiliary feeding device of the printer, intermittent start and stop of the stepping motor are adopted as a whole, intermittent stretching and retracting of the electric push rod are matched, the feeding purpose is achieved, the pulling force of the printer head to a wire material is relieved, the wire material can be prevented from loosening, winding and knotting, it is guaranteed that the 3D printer can conduct printing operation smoothly, and printing operation of the 3D printer is better facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of printer accessories, and particularly relates to a printer auxiliary feeding device. Background Art

[0002] 3D printing technology, also known as additive manufacturing technology, can achieve personalized customization and meet consumers' needs for product diversity and personalization. Secondly, 3D printing uses a layer-by-layer manufacturing method, which can greatly reduce waste of raw materials and lower production costs. In addition, 3D printing can easily manufacture parts with complex shapes, providing more possibilities for innovative design. With the continuous progress of computer technology and materials science, 3D printing technology has gradually matured and been commercialized. In the manufacturing industry, 3D printing technology is widely used in the production of complex parts, customized products, molds, etc. Through 3D printing, enterprises can quickly respond to market demands, reduce production costs, and improve product competitiveness; in the medical field, 3D printing technology can be used to print personalized medical devices, prostheses, biological models, and even human organs. In addition, 3D printing technology has also been widely used in many fields such as automobile manufacturing, game toys, food processing, film and television props, art production, clothing, maker education, etc.

[0003] With the continuous progress and innovation of technology, 3D printing technology is moving towards intelligence and automation to achieve more efficient and precise printing. However, it is found in the actual application process of 3D printers that the feeding of 3D printers usually adopts a structural method of rotating the material tray by the printer head to achieve feeding. In this process, the phenomenon that the material tray rotates automatically, resulting in the wire material on the material tray being loose, wound, and knotted, easily occurs, leading to the interruption of the 3D printing process, and the product has gaps or interfaces, affecting the quality of the printed product. Therefore, this application proposes a printer auxiliary feeding device. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a printer auxiliary feeding device, aiming to solve the technical problem that the wire material is prone to be loose, wound, and knotted during the feeding process of 3D printers in the prior art.

[0005] Technical Solution

[0006] To solve the above technical problems, the present utility model provides a printer auxiliary feeding device, including a mounting arm and a material roll. One side of the top end of the mounting arm is horizontally and rotatably assembled with a shaft rod. The material roll is sleeved on the shaft rod and can rotate synchronously with the shaft rod. The other side of the top end of the mounting arm is assembled with a driven disk coaxially connected to the shaft rod. A limiting mechanism is arranged at the top end of the mounting arm. The limiting mechanism includes a shell arm radially assembled on one side of the driven disk. A limiting ejector rod movably penetrates through one end of the shell arm facing the driven disk. A plurality of circular grooves are formed on the circumferential surface of the driven disk. The limiting ejector rod is spherically fitted with the circular grooves. A spring for pushing the limiting ejector rod to move towards the driven disk is arranged inside the shell arm. A limiting pressure plate for limiting the movement of the limiting ejector rod is embedded at the top of the shell arm.

[0007] Preferably, tooth teeth are arranged on the lower surface of the limiting pressure plate. Tooth grooves adapted to be engaged with the tooth teeth are formed on the side wall of the limiting ejector rod. An electric push rod is assembled above the shell arm. The telescopic end of the electric push rod is vertically downward and connected to the limiting pressure plate.

[0008] Preferably, one end of the shell arm away from the driven disk is penetrated through, and an end cap is threadedly sleeved on the end of the shell arm away from the driven disk. The spring is located between the limiting ejector rod and the end cap.

[0009] Preferably, a support plate is fixed on one side of the top of the mounting arm away from the shaft rod. A stepping motor for driving the driven disk to rotate is assembled on the support plate.

[0010] Preferably, a convex strip is axially arranged on the peripheral wall of the shaft rod. A shaft hole adapted to the shaft rod and the convex strip is formed on the material roll.

[0011] Preferably, a stop block is arranged at one end of the convex strip close to the mounting arm. An end plate is threadedly sleeved on the end of the shaft rod away from the mounting arm.

[0012] Preferably, the bottom end of the mounting arm is horizontally bent and provided with a connecting ear plate. Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] With the arrangement of the driven disk and the limiting mechanism in the present utility model, during the printing and feeding process, when the electric push rod is started to contract, the limiting pressure plate moves upward, and the teeth disengage from the tooth grooves. At this time, the elastic force of the spring pushes the limiting ejector rod to be engaged with the spherical surface of the circular groove on the circumferential surface of the driven disk. By starting the stepping motor to drive the driven disk and the shaft rod to rotate a certain angle or number of turns, the coil can release a corresponding length of wire for the printer head to perform the printing operation. During this process, the limiting ejector rod bounces on several circular grooves on the circumferential surface of the driven disk. After the feeding stops, the electric push rod is started to push the limiting pressure plate downward, and the tooth grooves are engaged with the teeth to position the limiting ejector rod. At this time, the limiting ejector rod is stably engaged with the circular groove on the circumferential surface of the driven disk to axially position the driven disk and the shaft rod, which can prevent the wire from being loosened, wound and knotted due to the self-rotation of the coil, ensuring that the 3D printer can smoothly perform the printing operation. As a whole, the stepping motor starts and stops intermittently, and cooperates with the intermittent expansion and contraction of the electric push rod, which not only achieves the purpose of feeding, relieves the pulling force of the printer head on the wire, but also prevents the wire from being loosened, wound and knotted, which is more beneficial to the printing operation of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the driven disk and the shaft rod in the present utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the limiting mechanism in the present utility model;

[0019] Figure 4 It is a schematic diagram of the internal structure of the housing arm in the present utility model;

[0020] Figure 5 It is a schematic diagram of the structure of the coil in the present utility model.

[0021] The reference signs in the drawings are: 1. mounting arm; 2. shaft rod; 3. coil; 4. driven disk; 5. limiting mechanism; 6. support plate; 7. stepping motor; 8. connecting ear plate; 9. circular groove; 10. rib; 11. stop block; 12. end plate; 13. housing arm; 14. limiting ejector rod; 15. limiting pressure plate; 16. electric push rod; 17. end cap; 18. tooth groove; 19. tooth; 20. spring; 21. shaft hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the protection scope of the present utility model.

[0023] This embodiment provides a printer auxiliary feeding device, and its structural schematic diagram is as Figures 1 - 5 shown, including a mounting arm 1 and a material roll 3. One side of the top end of the mounting arm 1 is horizontally and rotatably assembled with a shaft rod 2. The material roll 3 is sleeved on the shaft rod 2 and can rotate synchronously with the shaft rod 2. The other side of the top end of the mounting arm 1 is assembled with a driven disk 4 coaxially connected to the shaft rod 2. A limiting mechanism 5 is arranged at the top end of the mounting arm 1. The limiting mechanism 5 includes a shell arm 13 radially assembled on one side of the driven disk 4. One end of the shell arm 13 facing the driven disk 4 is movably penetrated with a limiting ejector rod 14. A plurality of circular grooves 9 are formed on the circumferential surface of the driven disk 4. The limiting ejector rod 14 is spherically fitted with the circular grooves 9. Specifically, the end surface of the limiting ejector rod 14 is spherical, and the circular grooves 9 are spherical concave. A spring 20 for pushing the limiting ejector rod 14 to move towards the driven disk 4 is arranged in the shell arm 13. A limiting pressure plate 15 for limiting the movement of the limiting ejector rod 14 is embedded at the top of the shell arm 13. Through this structural method, during the printing and feeding process, the limiting pressure plate 15 releases the limiting ejector rod 14, and the elastic force of the spring 20 pushes the limiting ejector rod 14 to be spherically fitted with the circular grooves 9 on the circumferential surface of the driven disk 4. Under the traction of the printer head, the material roll 3 starts to feed, and the shaft rod 2 and the driven disk 4 rotate with the material roll 3. During this process, the limiting ejector rod 14 bounces on a plurality of circular grooves 9 on the circumferential surface of the driven disk 4. After the feeding stops, the limiting pressure plate 15 presses down to position the limiting ejector rod 14. At this time, the limiting ejector rod 14 is stably fitted with the circular grooves 9 on the circumferential surface of the driven disk 4, axially positioning the driven disk 4 and the shaft rod 2, and preventing the wire material from being loose, wound and knotted due to the self-rotation of the material roll 3, ensuring that the 3D printer can smoothly perform the printing operation.

[0024] In this embodiment, teeth 19 are arranged on the lower surface of the limiting pressure plate 15, and tooth grooves 18 engaged with the teeth 19 are arranged on the side wall of the limiting ejector rod 14. An electric push rod 16 is assembled above the shell arm 13. The telescopic end of the electric push rod 16 is vertically downward and connected to the limiting pressure plate 15. By starting the electric push rod 16 to contract, the limiting pressure plate 15 is driven to move upward, and the teeth 19 are disengaged from the tooth grooves 18. At this time, the elastic force of the spring 20 pushes the limiting ejector rod 14 to be elastically fitted with the circular grooves 9 on the circumferential surface of the driven disk 4. By starting the electric push rod 16 to extend, the limiting pressure plate 15 is pushed downward, and the tooth grooves 18 are engaged with the teeth 19 to position the limiting ejector rod 14. At this time, the limiting ejector rod 14 is stably fitted with the circular grooves 9 on the circumferential surface of the driven disk 4, axially positioning the driven disk 4 and the shaft rod 2.

[0025] Further, one end of the shell arm 13 away from the driven disk 4 is provided with a through hole, and an end cap 17 is threadedly sleeved on the end of the shell arm 13 away from the driven disk 4. The spring 20 is located between the limit ejector rod 14 and the end cap 17, which is convenient for the assembly of the spring 20 and the limit ejector rod 14.

[0026] In a further embodiment, a support plate 6 is fixed on one side of the top of the mounting arm 1 away from the shaft rod 2. A stepping motor 7 for driving the rotation of the driven disk 4 is assembled on the support plate 6. During the printing and feeding process, starting the stepping motor 7 drives the driven disk 4 and the shaft rod 2 to rotate a certain angle or number of turns, so that the coil 3 can release a corresponding length of wire material for the print head of the printer to perform the printing operation. Compared with the print head pulling the wire material for feeding, the pulling force of the print head on the wire material can be alleviated.

[0027] In a further embodiment, a convex strip 10 is axially arranged on the peripheral wall of the shaft rod 2. A shaft hole 21 adapted to the shaft rod 2 and the convex strip 10 is formed on the coil 3, which can ensure that the coil 3 and the shaft rod 2 can rotate synchronously. A stop block 11 is arranged at one end of the convex strip 10 close to the mounting arm 1. An end plate 12 is threadedly sleeved on the end of the shaft rod 2 away from the mounting arm 1, which is convenient for the assembly of the coil 3. The bottom end of the mounting arm 1 is horizontally bent and provided with a connecting ear plate 8 for assembling the mounting arm 1 on a 3D printer.

[0028] Working principle: When in use, the mounting arm 1 is assembled on the 3D printer by using the connecting ear plate 8. During the printing and feeding process, starting the electric push rod 16 to contract drives the limit pressing plate 15 to move upward, and the tooth 19 disengages from the tooth groove 18. At this time, the elastic force of the spring 20 pushes the limit ejector rod 14 to be spherically engaged with the circular groove 9 on the circumferential surface of the driven disk 4. By starting the stepping motor 7 to drive the driven disk 4 and the shaft rod 2 to rotate a certain angle or number of turns, the coil 3 can release a corresponding length of wire material. During this process, the limit ejector rod 14 bounces on several circular grooves 9 on the circumferential surface of the driven disk 4. After the feeding stops, starting the electric push rod 16 to push the limit pressing plate 15 downward, the tooth groove 18 is engaged with the tooth 19 to position the limit ejector rod 14. At this time, the limit ejector rod 14 is stably engaged with the circular groove 9 on the circumferential surface of the driven disk 4 to axially position the driven disk 4 and the shaft rod 2, which can prevent the wire material from being loosely wound and knotted due to the self-rotation of the coil 3 and ensure that the 3D printer can smoothly perform the printing operation.

[0029] All the technical features in this embodiment can be freely combined according to actual needs.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A printer auxiliary feeding device, comprising a mounting arm (1) and a material roll (3), characterized in that: On one side of the top end of the mounting arm (1), a shaft rod (2) is horizontally and rotatably assembled. The material roll (3) is sleeved on the shaft rod (2) and can rotate synchronously with the shaft rod (2). On the other side of the top end of the mounting arm (1), a driven disk (4) coaxially connected to the shaft rod (2) is assembled; A limiting mechanism (5) is arranged at the top end of the mounting arm (1). The limiting mechanism (5) includes a shell arm (13) radially assembled on one side of the driven disk (4). A limiting ejector rod (14) movably penetrates through one end of the shell arm (13) facing the driven disk (4). A plurality of circular grooves (9) are formed on the circumferential surface of the driven disk (4). The limiting ejector rod (14) is spherically fitted with the circular grooves (9). A spring (20) for pushing the limiting ejector rod (14) to move towards the driven disk (4) is arranged in the shell arm (13). A limiting pressure plate (15) for limiting the movement of the limiting ejector rod (14) is embedded at the top of the shell arm (13).

2. The printer auxiliary feeding device according to claim 1, wherein, Teeth (19) are arranged on the lower surface of the limiting pressure plate (15). Tooth grooves (18) engaged with the teeth (19) are formed on the side wall of the limiting ejector rod (14). An electric push rod (16) is assembled above the shell arm (13). The telescopic end of the electric push rod (16) is vertically downward and connected to the limiting pressure plate (15).

3. The printer auxiliary feeding device according to claim 1, characterized in that, One end of the shell arm (13) far from the driven disk (4) is penetrated, and an end cap (17) is threadedly sleeved on the end of the shell arm (13) far from the driven disk (4). The spring (20) is located between the limiting ejector rod (14) and the end cap (17).

4. A printer auxiliary feeding device according to claim 1, characterized in that, A support plate (6) is fixed on one side of the top of the mounting arm (1) far from the shaft rod (2). A stepping motor (7) for driving the driven disk (4) to rotate is assembled on the support plate (6).

5. The printer auxiliary feeding device according to claim 1, characterized in that, Ribs (10) are axially arranged on the peripheral wall of the shaft rod (2). A shaft hole (21) adapted to the shaft rod (2) and the ribs (10) is formed on the material roll (3).

6. The printer auxiliary feeding device according to claim 5, wherein, A stop block (11) is arranged at one end of the rib (10) close to the mounting arm (1). An end plate (12) is threadedly sleeved on the end of the shaft rod (2) far from the mounting arm (1).

7. The printer auxiliary feeding device according to claim 1, characterized in that, The bottom end of the mounting arm (1) is horizontally bent and provided with a connecting ear plate (8).

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