3D printing precision feeding device with multiple anti-breaking functions

Abstract

The present invention relates to the field of 3D printing technology, specifically to a 3D printing precision feeding device with multiple anti-breaking functions, comprising a feeding bin for storing printer liquid raw materials, a stirring assembly for stirring the liquid raw materials, a positioning assembly for measuring the liquid level in the feeding bin, and an anti-breaking assembly for preventing material breaking. The stirring assembly is installed inside the feeding bin to stir the raw materials to prevent them from solidifying, the positioning assembly is installed on the side wall of the feeding bin, and the anti-breaking assembly is installed at the outlet pipe opening provided at the bottom of the feeding bin. The present invention drives the hammer block to slide through the connecting line via the floating ring in the positioning assembly, thereby triggering the warning light to light up and reminding the feeding bin of a lack of material. At the same time, the fan wheel in the anti-breaking assembly stops rotating, and the energy storage spring pushes the second rack to slide, thereby causing the pressing arm to press the control button to shut down the 3D printer and avoid running with empty material.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing technology, and in particular to a 3D printing precision feeding device with multiple anti-breaking functions. Background Art

[0002] 3D printing, also known as additive manufacturing technology, is a technology that manufactures physical parts by adding materials layer by layer based on three-dimensional CAD data.

[0003] The patent with publication number CN115972583A discloses a 3D printer feeding device that prevents material shortages. The device includes a material preparation box, a material box, a positioning component, a micro water pump, and a transmission tube. Two transmission tubes are provided, and the two transmission tubes are fixedly connected to the input end and output end of the micro water pump, respectively. The micro water pump is connected to the material preparation box and the material box through the two transmission tubes. The positioning component is electrically connected to the micro water pump. The micro water pump receives the real-time water level height signal of the positioning component and transfers the liquid consumables in the material preparation box to the material box to prevent material shortages. The micro water pump starts and emits a warning sound. In the above invention, when the liquid photocurable resin in the material box is almost exhausted, the micro water pump transfers the liquid photocurable resin in the material preparation box to the material box. After the transfer is completed, the user adds liquid photocurable resin to the inside of the material preparation box, so that the liquid photocurable resin in the material box is always within the preset safety threshold to achieve the purpose of preventing material shortages.

[0004] The current mainstream solutions generally have only one anti-material-breakage setting. When a single positioning component fails, the anti-material-breakage mechanism fails, and 3D printing will produce empty materials, which directly affects the 3D printing effect. In addition, the float is driven up and down by magnetic attraction to indicate the liquid level. This magnetic attraction method is not strong and can easily detach due to misalignment, causing the float to slip and affecting subsequent warning work.

[0005] In view of this, we propose a 3D printing precision feeding device with multiple anti-breaking functions. Summary of the Invention

[0006] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a 3D printing precision feeding device with multiple anti-breaking functions. The floating ring in the positioning component fluctuates up and down with the liquid level, triggering the position of the hammer block in the scale cylinder to display the liquid level in the feeding bin. When the liquid level reaches the specified position, the warning light of the warning part lights up to give a warning. In addition, when the liquid in the anti-breaking component stops flowing, the fan wheel stops rotating, the second spring pushes the second rack to slide, and the pressing arm triggers the control button to shut down the 3D printer, forming a multiple anti-breaking mechanism to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides a 3D printing precision feeding device with multiple anti-breaking functions, comprising a feeding hopper for storing printer liquid raw materials, a stirring assembly for stirring the liquid raw materials, a positioning assembly for measuring the liquid level in the feeding hopper, and an anti-breaking assembly for preventing material breaking. The stirring assembly is installed inside the feeding hopper to stir the raw materials to prevent them from solidifying, the positioning assembly is installed on the side wall of the feeding hopper, and the anti-breaking assembly is installed at the outlet pipe opening provided at the bottom of the feeding hopper;

[0008] The positioning assembly includes a floating ring slidably connected to the upper material bin, a graduated cylinder fixed to the side wall of the upper material bin, a hammer block slidably sleeved inside the graduated cylinder, a connecting line passing around the top of the graduated cylinder and connected to the floating ring and the hammer block, and an adjustable warning member provided on the outer wall of the graduated cylinder. The warning member includes a fixing frame clamped to the outer wall of the graduated cylinder, a warning light mounted on the outer wall of the fixing frame, and a cam rotatably connected to the inner wall of the fixing frame.

[0009] In this setting, the floating ring moves up and down with the liquid level in the upper hopper, and the hammer slides up and down in the graduated cylinder accordingly to display the liquid level in the upper hopper. By fixing the warning piece on the graduated cylinder, when the liquid level drops, the hammer moves up and contacts the warning piece, and the first rack drives the cam to rotate. The cam triggers the warning light button, and the warning light lights up to warn that raw materials need to be added to the upper hopper to avoid material shortage.

[0010] The anti-breakage component includes a fan wheel rotatably connected to the discharge pipe, a ratchet member coaxially sleeved on the top of the fan wheel, a second rack engaged with one side of the ratchet member, a pressing arm welded and fixed to the top surface of the second rack, and a second spring arranged at one end of the second rack; a control button is installed above the outlet of the discharge pipe, and the pressing arm moves toward and contacts the control button to turn on and off the 3D printer.

[0011] In this setting, when the liquid raw material flows, it drives the fan wheel to rotate, and the ratchet wheel rotates accordingly, driving the second rack to slide, squeezing the second spring, so that the second spring is always in a compressed energy storage state. When the liquid raw material is exhausted, the fan wheel stops rotating, and the second spring pushes the second rack to slide, pushing the pressing arm to squeeze the control button, turning off the 3D printer.

[0012] As a further improvement of the present technical solution, the stirring assembly includes a rotating shaft rotatably connected to the loading hopper, a plurality of stirring rods welded and fixed to the side walls of the rotating shaft, and a spiral blade welded and fixed to the bottom end of the outer wall of the rotating shaft. A motor is installed at the center of the top surface of the loading hopper, and the output shaft of the motor is coaxially connected to the rotating shaft.

[0013] This setting starts the motor, drives the rotating shaft to rotate, rotates the stirring rod, stirs the raw materials to prevent solidification, and at the same time the spiral blade drives the liquid raw materials into the discharge pipe.

[0014] As a further improvement of this technical solution, a scraper ring is provided on the outer wall of the floating ring, the outer wall of the scraper ring is in contact with the inner wall of the loading bin, and the loading bin and the top surface of the scale cylinder are welded with a fixed pulley for guiding the connecting line.

[0015] In this setting, the scraper ring moves up and down with the floating ring to scrape off the material attached to the inner wall of the upper hopper, and the fixed pulley guides the connecting line to connect the hammer block.

[0016] As a further improvement of the technical solution, a first rack is welded and fixed to the side wall of the hammer block, a long hole matching the size of the first rack is opened on the side wall of the scale cylinder, and a liquid level scale line is provided on the side wall of the scale cylinder.

[0017] As a further improvement of the present technical solution, a convex tooth adapted to the first rack is provided on the base circle side surface of the cam, and when the protruding portion of the cam is in a horizontal state, it presses the switch button of the warning light.

[0018] The first rack of these two settings moves up and down with the hammer block, driving the cam to rotate, turning on the warning light, and the liquid level scale line conveniently and intuitively displays the liquid level in the loading bin.

[0019] As a further improvement of the technical solution, fastening bolts for fixing are threadedly connected to two opposite side walls of the fixing frame, and a fixing ring for installing a warning light is provided on one side of the fixing frame.

[0020] This setup uses fastening bolts to fix the fixing bracket to the scale cylinder, and the fixing ring facilitates the installation of the warning light.

[0021] As a further improvement of the present technical solution, a central shaft is provided in the middle of the impeller, and the central shaft extends out of the side wall of the discharge pipe and is coaxially connected to the ratchet member.

[0022] This setting rotates the fan wheel, which drives the ratchet wheel to rotate through the central shaft.

[0023] As a further improvement of the present technical solution, the ratchet member includes a center block, an outer tooth ring rotatably connected to the outside of the center block, and a pawl hinged to the center block, the outer tooth ring is engaged with the second rack, the inner side wall of the outer tooth ring is provided with internal teeth adapted to the pawl, and a first spring is provided on the side of the pawl away from the hinged end.

[0024] In this setting, when the center block rotates, the pawl enters the groove of the inner teeth under the action of centrifugal force, thereby driving the outer gear ring to rotate. When the center block stops rotating, the pawl disengages the groove of the inner teeth under the action of the first spring.

[0025] As a further improvement of the present technical solution, a feed port is provided on the top surface of the loading bin, and a top block is adhered and fixed to the end of the pressing arm. When the impeller rotates, the second rack is at the end away from the control button, and the second spring is in a compressed state. When the impeller stops rotating, the second rack is at the end close to the control button, and the top block squeezes the control button.

[0026] This setting ensures that when the liquid raw material in the loading bin is used up, the arm squeeze control button is pressed to shut down the 3D printer, preventing the 3D printer from running with empty material.

[0027] As a further improvement of the present technical solution, the motor and the warning light are both connected to an external power source via wires, the control button is connected to a 3D printer via a signal line, and the discharge pipe is connected to the 3D printer.

[0028] This setting provides power for the motor and warning light to operate, and the control button can control the 3D printer.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. This 3D printing precision feeding device with multiple anti-breaking functions starts the motor to drive the rotating shaft to rotate, so that the stirring rod stirs the liquid raw material to prevent it from solidifying, and the spiral blade smoothly guides the raw material into the discharge pipe, forming a feeding state from the raw material output source.

[0031] 2. This 3D printing precision feeding device has multiple anti-material-break functions. The floating ring moves up and down with the liquid level in the feeding bin, and the hammer block slides up and down in the graduated cylinder accordingly, indicating the raw material level in the feeding bin. By fixing the warning piece on the graduated cylinder, when the liquid level drops, the hammer block moves up and connects with the warning piece. The first rack drives the cam to rotate, and the cam triggers the warning light button. The warning light lights up and issues a warning, reminding the staff to deal with it in time to avoid material breakage due to lack of liquid, thus forming an early warning and material refilling state during the working process.

[0032] 3. This 3D printing precision feeding device with multiple anti-material-breaking functions, when the liquid raw material flows in the discharge pipe, drives the fan wheel to rotate, and the ratchet wheel rotates accordingly, drives the rack to slide, and squeezes the second spring, so that the second spring is always in a compressed energy storage state. When the liquid raw material is exhausted, the fan wheel stops rotating, and the second spring pushes the second rack to slide, pushing the pressing arm to squeeze the control button, shutting down the 3D printer to avoid running with empty material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is an exploded view of the overall structure of the present invention;

[0036] Figure 3 This is an exploded view of the positioning component structure of the present invention;

[0037] Figure 4 This is a cross-sectional view of the warning member structure of the present invention;

[0038] Figure 5 This is an exploded view of the warning member structure of the present invention;

[0039] Figure 6 This is a schematic structural diagram of the anti-breakage component of the present invention;

[0040] Figure 7 This is an exploded view of the anti-breakage component structure of the present invention;

[0041] Figure 8 An exploded view of the ratchet structure of the present invention;

[0042] Figure 9 It is a cross-sectional view of the overall structure of the present invention.

[0043] The meaning of each number in the figure is:

[0044] 100, feeding bin; 110, feeding port; 120, discharging pipe;

[0045] 200, stirring assembly; 210, rotating shaft; 220, stirring rod; 230, spiral blade; 240, motor;

[0046] 300, positioning assembly; 310, floating ring; 320, scraper ring; 330, graduated cylinder; 331, liquid level mark; 332, elongated hole; 340, fixed pulley; 350, connecting line; 360, hammer block; 361, first rack; 370, warning member; 371, fixing bracket; 372, cam; 373, warning light; 374, fastening bolt; 375, fixing ring;

[0047] 400, anti-break assembly; 410, fan wheel; 411, center shaft; 420, ratchet member; 421, center block; 422, outer gear ring; 423, inner teeth; 424, pawl; 425, first spring; 430, second rack; 440, second spring; 450, pressing arm; 451, top block; 460, control button. DETAILED DESCRIPTION

[0048] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explaining the present invention only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, which should be considered to fall within the scope of the present invention. The terms "mounted" and "connected" should be understood broadly and can refer to direct connection or indirect connection through an intermediary.

[0049] The terms "central axis," "vertical," "horizontal," "front," "back," "up," "down," "left," "right," "top," "bottom," "inside," and "outside" used herein to indicate positions or location relationships are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "several" means two or more, unless otherwise specifically defined.

[0050] See also Figures 1-9 As shown, the present invention provides a 3D printing precision feeding device with multiple anti-breaking functions, including a feeding bin 100 for storing printer liquid raw materials, a stirring assembly 200 for stirring the liquid raw materials, a positioning assembly 300 for measuring the liquid level in the feeding bin 100, and an anti-breaking assembly 400 for preventing material breaking. The stirring assembly 200 is installed inside the feeding bin 100 to stir the raw materials to prevent them from solidifying, the positioning assembly 300 is installed on the side wall of the feeding bin 100, and the anti-breaking assembly 400 is installed at the outlet pipe 120 provided at the bottom of the feeding bin 100.

[0051] See also Figure 2 and Figure 3 The positioning assembly 300 includes a floating ring 310 slidably connected to the upper hopper 100, a graduated cylinder 330 fixed to the side wall of the upper hopper 100, a hammer block 360 slidably sleeved inside the graduated cylinder 330, a connecting line 350 passing around the top of the graduated cylinder 330 and connected to the floating ring 310 and the hammer block 360, and an adjustable warning member 370 provided on the outer wall of the graduated cylinder 330. Figure 4 and Figure 5The warning member 370 includes a fixing frame 371 clamped with the outer wall of the scale cylinder 330, a warning light 373 installed on the outer wall of the fixing frame 371, and a cam 372 rotatably connected to the inner wall of the fixing frame 371. When the liquid level of the warning member 370 reaches a specified height, the warning light 373 is triggered to light up, the floating ring 310 moves up and down with the liquid level in the upper hopper 100, and the hammer block 360 slides up and down in the scale cylinder 330 to display the liquid level in the upper hopper 100. By fixing the warning member 370 on the scale cylinder 330, when the liquid level drops, the hammer block 360 moves up and connects with the warning member 370, the cam 372 triggers the warning light 373 button, and the warning light 373 lights up to warn that raw materials need to be added to the upper hopper 100 to avoid material shortage.

[0052] See also Figure 6 and Figure 7 The anti-breaking component 400 includes a fan wheel 410 rotatably connected to the discharge pipe 120, a ratchet part 420 coaxially sleeved on the top of the fan wheel 410, a second rack 430 meshing with one side of the ratchet part 420, a pressing arm 450 welded and fixed to the top surface of the second rack 430, and a second spring 440 arranged at one end of the second rack 430; a control button 460 is installed above the mouth of the discharge pipe 120, and the pressing arm 450 moves toward and contacts the control button 460 to turn on and off the 3D printer. When the liquid raw material in the discharge pipe 120 flows, the fan wheel 410 is driven to rotate, and the ratchet part 420 rotates accordingly, driving the second rack 430 to slide, squeezing the second spring 440, so that the second spring 440 is always in a compressed energy storage state. When the liquid raw material is exhausted, the fan wheel 410 stops rotating, and the second spring 440 pushes the second rack 430 to slide, pushing the pressing arm 450 to squeeze the control button 460, turning off the 3D printer.

[0053] For details, please refer to Figure 3 A scraper ring 320 is provided on the outer wall of the floating ring 310. The outer wall of the scraper ring 320 is in contact with the inner wall of the loading bin 100. The scraper ring 320 moves up and down with the floating ring 310 to scrape off the material attached to the inner wall of the loading bin 100. A fixed pulley 340 for guiding the connecting line 350 is welded and fixed to the top surface of the loading bin 100 and the scale cylinder 330. The fixed pulley 340 guides the connecting line 350 to connect to the hammer block 360.

[0054] For further information, see Figure 3 A first rack 361 is welded and fixed to the side wall of the hammer block 360, and a long hole 332 with a size matching that of the first rack 361 is opened on the side wall of the scale cylinder 330. The first rack 361 moves up and down along the long hole 332 with the hammer block 360, and a liquid level scale line 331 is provided on the side wall of the scale cylinder 330. The liquid level scale line 331 facilitates and intuitively displays the liquid level in the loading bin 100.

[0055] For details, please refer to Figure 4and Figure 5 The base circle side of the cam 372 is provided with a convex tooth that is adapted to the first rack 361. When the protruding part of the cam 372 is in a horizontal state, it squeezes the switch button of the warning light 373. The design of the convex tooth makes it possible for the first rack 361 to drive the cam 372 to rotate when the hammer block 360 contacts, thereby triggering the warning light 373.

[0056] In addition, see Figure 5 , fastening bolts 374 for fixing are threadedly connected on the two opposite side walls of the fixing frame 371, and a fixing ring 375 for installing the warning light 373 is provided on one side of the fixing frame 371. The fastening bolts 374 fix the fixing frame 371 on the scale cylinder 330, and the fixing ring 375 facilitates the installation of the warning light 373.

[0057] For further information, see Figure 2 The stirring assembly 200 includes a rotating shaft 210 rotatably connected to the upper hopper 100, a plurality of stirring rods 220 welded and fixed to the side wall of the rotating shaft 210, and a spiral blade 230 welded and fixed to the bottom end of the outer wall of the rotating shaft 210. A motor 240 is installed at the center of the top surface of the upper hopper 100. The output shaft of the motor 240 is coaxially connected to the rotating shaft 210. The motor 240 drives the rotating shaft 210 to rotate, and the stirring rod 220 rotates to stir the raw materials to prevent solidification. At the same time, the spiral blade 230 drives the liquid raw material into the discharge pipe 120.

[0058] For details, please refer to Figure 8 The ratchet member 420 includes a center block 421, an outer tooth ring 422 rotatably connected to the outside of the center block 421, and a pawl 424 hinged on the center block 421. The outer tooth ring 422 is engaged with the second rack 430. The inner side wall of the outer tooth ring 422 is provided with inner teeth 423 adapted to the pawl 424. A first spring 425 is provided on the side of the pawl 424 away from the hinged end. When the center block 421 rotates, the pawl 424 enters the groove of the inner teeth 423 under the action of centrifugal force, thereby driving the outer tooth ring 422 to rotate. When the center block 421 stops rotating, the pawl 424 disengages from the groove of the inner teeth 423 under the action of the first spring 425.

[0059] It is worth noting that, please refer to Figure 7 A central shaft 411 is provided in the middle of the impeller 410 . The central shaft 411 extends out of the side wall of the discharge pipe 120 and is coaxially connected to the ratchet member 420 . When the impeller 410 rotates, the ratchet member 420 is driven to rotate through the central shaft 411 .

[0060] Furthermore, the motor 240 and the warning light 373 are connected to an external power supply through wires, the control button 460 is connected to the 3D printer through a signal line, the discharge pipe 120 is connected to the 3D printer, and the wire-connected power supply provides power for the operation of the motor 240 and the warning light 373. The control button 460 can control the 3D printer switch.

[0061] For details, please refer to Figure 1 and Figure 7 A feed port 110 is provided on the top surface of the loading bin 100, and a top block 451 is adhered and fixed to the end of the pressing arm 450. When the impeller 410 rotates, the second rack 430 is at the end away from the control button 460, and the second spring 440 is in a compressed state. When the impeller 410 stops rotating, the second rack 430 is at the end close to the control button 460, and the top block 451 squeezes the control button 460. When the liquid raw material in the loading bin 100 is used up, the pressing arm 450 squeezes the control button 460 to turn off the 3D printer and prevent the 3D printer from running with empty material.

[0062] When the 3D printing precision feeding device with multiple anti-breaking functions of the present invention is working, the staff first pours the liquid raw material into the feeding bin 100 from the feed port 110, starts the motor 240, drives the rotating shaft 210 to rotate, the stirring rod 220 stirs the raw material, and the spiral blade 230 squeezes the raw material into the discharge pipe 120. The liquid raw material flows, driving the fan wheel 410 to rotate, the center block 421 to rotate, and the ratchet 424 extends into the card groove of the inner tooth 423 under the action of centrifugal force, driving the outer gear ring 422 to rotate, and then drives the second rack 430 to slide, squeezing the second spring 440, and the warning member 370 is opened. By tightening the bolts 374 and fixing it to the specified position of the scale cylinder 330, the liquid level in the loading bin 100 drops, and the floating ring 310 drops accordingly. The connecting line 350 pulls the hammer block 360 upward until the first rack 361 slides to the warning member 370, driving the cam 372 to rotate, triggering the warning light 373 to light up, and reminding to add raw materials. When the liquid raw material in the discharge pipe 120 is used up, the fan wheel 410 stops rotating, and the pawl 424 disengages from the slot of the inner tooth 423 under the tension of the first spring 425. The second spring 440 pushes the second rack 430 to slide, and the pressing arm 450 squeezes the control button 460 to turn off the 3D printer.

[0063] It should be noted that the above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit and substance of the present invention are intended to be encompassed within the scope of protection of the present invention.

Claims

1. A 3D printing precision feeding device with multiple anti-breaking functions, comprising a feeding hopper for storing printer liquid raw materials, a stirring assembly for stirring the liquid raw materials, a position measuring assembly for measuring the liquid level in the feeding hopper, and an anti-breaking assembly for preventing breaking of the material, characterized by: The stirring component is installed inside the upper silo to stir the raw materials to prevent them from solidifying, the positioning component is installed on the side wall of the upper silo, and the anti-breaking component is installed at the outlet pipe opening provided at the bottom of the upper silo; The positioning assembly includes a floating ring slidably connected to the upper material bin, a graduated cylinder fixed to the side wall of the upper material bin, a hammer block slidably sleeved inside the graduated cylinder, a connecting line passing around the top of the graduated cylinder and connected to the floating ring and the hammer block, and an adjustable warning member provided on the outer wall of the graduated cylinder. The warning member includes a fixing frame clamped to the outer wall of the graduated cylinder, a warning light mounted on the outer wall of the fixing frame, and a cam rotatably connected to the inner wall of the fixing frame. The anti-breakage component includes a fan wheel rotatably connected to the discharge pipe, a ratchet member coaxially sleeved on the top of the fan wheel, a second rack engaged with one side of the ratchet member, a pressing arm welded and fixed to the top surface of the second rack, and a second spring arranged at one end of the second rack; a control button is installed above the outlet of the discharge pipe, and the pressing arm moves toward and contacts the control button to turn on and off the 3D printer.

2. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 1 is characterized by: The stirring assembly includes a rotating shaft rotatably connected to the upper hopper, a plurality of stirring rods welded and fixed to the side wall of the rotating shaft, and a spiral blade welded and fixed to the bottom end of the outer wall of the rotating shaft. A motor is installed at the center of the top surface of the upper hopper, and the output shaft of the motor is coaxially connected to the rotating shaft.

3. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 2 is characterized by: A scraper ring is provided on the outer side wall of the floating ring, and the outer side wall of the scraper ring is in contact with the inner side wall of the loading bin. The loading bin and the top surface of the scale cylinder are both welded and fixed with a fixed pulley for guiding the connecting line.

4. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 3 is characterized by: A first rack is welded and fixed to the side wall of the hammer block, a long hole with a size matching that of the first rack is opened on the side wall of the scale cylinder, and a liquid level scale line is provided on the side wall of the scale cylinder.

5. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 4 is characterized in that: A convex tooth matched with the first rack is provided on the base circle side surface of the cam, and when the protruding portion of the cam is in a horizontal state, it presses the switch button of the warning light.

6. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 5 is characterized in that: Two opposite side walls of the fixing frame are threadedly connected with fastening bolts for fixing, and one side surface of the fixing frame is provided with a fixing ring for installing a warning light.

7. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 6 is characterized in that: A central shaft is provided in the middle of the fan wheel, and the central shaft extends out of the side wall of the discharge pipe and is coaxially connected to the ratchet component.

8. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 7 is characterized in that: The ratchet member includes a center block, an outer tooth ring rotatably connected to the outside of the center block, and a pawl hinged on the center block. The outer tooth ring is engaged with the second rack. The inner side wall of the outer tooth ring is provided with internal teeth adapted to the pawl. A first spring is provided on the side of the pawl away from the hinged end.

9. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 8, characterized in that: A feed port is provided on the top surface of the loading bin, and a top block is adhered and fixed to the end of the pressing arm. When the impeller rotates, the second rack is at the end away from the control button, and the second spring is in a compressed state. When the impeller stops rotating, the second rack is at the end close to the control button, and the top block squeezes the control button.

10. The 3D printing precision feeding device with multiple anti-breaking functions according to claim 9, characterized in that: The motor and the warning light are both connected to an external power source via wires, the control button is connected to a 3D printer via a signal line, and the discharge pipe is connected to the 3D printer.

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