Extrusion mechanism and 3D printing device applying same

Abstract

The embodiment of the utility model provides an extrusion mechanism and a 3D printing device applying the extrusion mechanism. The extrusion mechanism is used for extruding consumables and comprises a pair of bevel gears, a pair of extrusion wheels and a transmission part. One of the pair of helical gears is connected with the torque output end of the extrusion mechanism, and one of the pair of helical gears is meshed with the other helical gear through helical teeth; the other one of the pair of helical gears is in transmission connection with one of the pair of extrusion wheels, and the pair of extrusion wheels is used for clamping and extruding consumables; and the transmission part is connected with the other one of the pair of extrusion wheels and is used for adjusting the clamping state of the pair of extrusion wheels on the consumable.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to an extrusion mechanism and a 3D printing device using the same. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses digital model files as the basis, special wax materials, powdered metals or plastics and other bondable materials to print layers of materials to create three-dimensional objects. Fused deposition modeling technology is one of the main 3D printing technologies. This technology heats and melts the hot-melt filament, squeezes it out from the nozzle, and deposits it on the molding platform or the previous layer of solidified material to finally generate a physical object.

[0003] When using plastic consumables, the most common technology is fused filament deposition technology, which feeds the filamentary printing material into the heating head, heats it and melts it, and then extrude it through a fine nozzle and deposits it on the workbench. When the material temperature is lower than the curing temperature, it begins to solidify, and the finished product is finally formed through the accumulation of layers of materials. Extruding consumables is a very critical step in the 3D printing process. If the extrusion mechanism is not stable in holding or transmitting the consumables, it will directly lead to unstable consumable transmission and printing, and further lead to poor printing effects or even failure.

[0004] How to solve the above problems and provide a convenient, stable and reliable extrusion mechanism and a 3D printing device using the same is what technicians in this field need to consider. Utility Model Content

[0005] In order to solve the problems in the prior art, the embodiments of the present application provide a convenient, stable and reliable extrusion mechanism and a 3D printing device using the same.

[0006] The embodiment of the present application provides an extrusion mechanism for extruding consumables, and the extrusion mechanism includes:

[0007] a pair of helical gears, one of the pair of helical gears being connected to the torque output end of the extrusion mechanism, and one of the pair of helical gears being meshed with the other through helical teeth;

[0008] A pair of extrusion wheels, the other of the pair of helical gears is drivingly connected to one of the pair of extrusion wheels, and the pair of extrusion wheels are used to clamp and extrude consumables;

[0009] A transmission member is connected to the other one of the pair of extrusion wheels and is used to adjust the clamping state of the pair of extrusion wheels on the consumables.

[0010] In one embodiment, the pair of bevel gears includes a first transmission gear and a second transmission gear, the first transmission gear is drivingly connected to the torque output end of the extrusion mechanism, and the second transmission gear is meshed with the first transmission gear. The pair of extrusion wheels includes a first extrusion wheel and a second extrusion wheel, the first extrusion wheel is drivingly connected to the second transmission gear, and the second extrusion wheel is connected to the transmission member. The first extrusion wheel and the second extrusion wheel are spaced apart and are used to cooperate to clamp the extruded consumables.

[0011] In one embodiment, the extrusion mechanism further includes a third transmission gear and a fourth transmission gear, the third transmission gear is transmission-connected to the second transmission gear, the fourth transmission gear is transmission-connected to the first extrusion wheel, and the third transmission gear is meshed with the fourth transmission gear.

[0012] In one embodiment, the third transmission gear and the second transmission gear are coaxially arranged through a first transmission shaft and rotate synchronously, and the fourth transmission gear and the first extrusion wheel are coaxially arranged through a second transmission shaft and rotate synchronously.

[0013] In one embodiment, the extrusion mechanism also includes a driving member, which is the torque output end of the extrusion mechanism, the first transmission gear is transmission-connected to the driving member, the first transmission gear and the second transmission gear are arranged side by side, the third transmission gear is arranged on the side of the second transmission gear away from the driving member, and the third transmission gear and the fourth transmission gear are arranged side by side.

[0014] In one embodiment, the pair of extrusion wheels include a first end and a second end spaced apart, and the other of the pair of extrusion wheels is connected to the transmission member between the first end and the second end; the extrusion mechanism also includes a bracket, which is movably connected to the first end so that the transmission member can rotate relative to the bracket; the extrusion mechanism also includes a reset member, which is arranged between the bracket and the transmission member and is used to enable the transmission member to drive the pair of extrusion wheels to clamp the consumable material, and the force arm from the reset member to the first end is shorter than the force arm from the second end to the first end.

[0015] In one embodiment, the bracket includes a first main body and a second main body, the second main body is arranged on one side of the first main body and connected to the first main body, the first main body is provided with a receiving cavity, the pair of bevel gears are arranged in the receiving cavity, the pair of extrusion wheels, the second main body and the transmission member are located on the same side of the first main body, and the reset member is arranged between the second main body and the transmission member.

[0016] In one embodiment, the first end is rotatably connected to the first main body, the second end is spaced apart from the second main body, the reset member is disposed between the second end and the second main body, and the reset member is disposed on the side of the pair of extrusion wheels connected to the transmission member away from the first end.

[0017] In one embodiment, the transmission member also includes an installation area, which is arranged between the first end and the second end, and the installation area includes a first connecting plate and a second connecting plate arranged at intervals. The installation area is provided with a through hole that penetrates the first connecting plate and the second connecting plate. The other of the pair of extrusion wheels is arranged between the first connecting plate and the second connecting plate, and is rotatably connected to the transmission member through a third transmission shaft.

[0018] An embodiment of the present application further provides a 3D printing device, which includes a molding platform, a driving component, and an extrusion mechanism as described in any one of the aforementioned embodiments, wherein the driving component drives the extrusion mechanism to move relative to the molding platform.

[0019] It can be understood that the extrusion mechanism of the present application is provided with a pair of helical gears connecting the torque output end and a pair of extrusion wheels, so that the torque output from the torque output end can be smoothly transmitted to the extrusion wheel, reducing the vibration during the transmission process, reducing the vibration intensity of the extrusion mechanism as a whole and further reducing the vibration intensity transmitted from the extrusion wheel to the consumables, improving the stability and reliability of the extrusion mechanism, reducing the vibration intensity transmitted to the 3D printing nozzle and avoiding the vibration marks generated during the printing process, and improving the quality of 3D printing. One of the pair of extrusion wheels is connected to the torque output end through a pair of helical gears, and the other is connected to the transmission member, which is used to adjust the clamping state of the pair of extrusion wheels on the consumables, and the two extrusion wheels cooperate with each other to achieve smooth extrusion of the consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of the extrusion mechanism provided in an embodiment of the present application.

[0021] Figure 2 A partial three-dimensional schematic diagram of the extrusion mechanism provided in an embodiment of the present application.

[0022] Figure 3 A partial three-dimensional schematic diagram of the extrusion mechanism provided in an embodiment of the present application.

[0023] Figure 4 A partial three-dimensional schematic diagram of the extrusion mechanism provided in an embodiment of the present application.

[0024] Figure 5 A schematic diagram of a partial breakdown of the extrusion mechanism provided in an embodiment of the present application.

[0025] Figure 6 A partial plan view of the extrusion mechanism provided in an embodiment of the present application.

[0026] Figure 7 A schematic diagram of a partial breakdown of the extrusion mechanism provided in an embodiment of the present application.

[0027] Figure 8 A three-dimensional schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0028] Main component symbols

[0029] Extrusion mechanism 10

[0030] Transmission Channel 101

[0031] A pair of helical gears 11

[0032] The first transmission gear 111

[0033] First column 1111

[0034] First helical tooth 1112

[0035] The second transmission gear 112

[0036] The second column 1121

[0037] Second helical tooth 1122

[0038] The third transmission gear 113

[0039] A pair of extrusion wheels 12

[0040] The first extrusion wheel 121

[0041] The second extrusion wheel 122

[0042] Tank structure 123

[0043] Fourth transmission gear 124

[0044] The first transmission shaft 131

[0045] The second transmission shaft 132

[0046] The third transmission shaft 133

[0047] Bracket 14

[0048] The first main body 141

[0049] Accommodating chamber 1410

[0050] The second main body 142

[0051] Concave hole 1420

[0052] Transmission parts 15

[0053] The first end portion 151

[0054] The second end 152

[0055] Installation area 153

[0056] First connecting plate 1531

[0057] Second connecting plate 1532

[0058] Through hole 1533

[0059] Driving member 16

[0060] Functional body 161

[0061] Output shaft 162

[0062] Reset 17

[0063] 3D printing device 1

[0064] Forming platform 18

[0065] Drive assembly 19

[0066] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0067] The following description will refer to the accompanying drawings to more fully describe the content of the present application. The accompanying drawings show exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components. The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those generally understood by ordinary technicians in the field to which the present application belongs. Furthermore, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0068] Usually, when using plastic consumables, the most common technology is fused filament deposition technology, which feeds the filamentary printing material into the heating head, heats it and melts it, and then extrude it through a fine nozzle and deposits it on the workbench. When the material temperature is lower than the curing temperature, it begins to solidify, and the finished product is finally formed through the accumulation of layers of materials. Extruding consumables is a very critical step in the 3D printing process. If the extrusion mechanism is not stable in holding or transmitting the consumables, it will directly lead to unstable consumable transmission and printing, and further lead to poor printing effects or even failure.

[0069] Correspondingly, the embodiment of the present application provides a convenient, stable and reliable extrusion mechanism and a 3D printing device using the same. The extrusion mechanism is used to extrude consumables, and includes a pair of bevel gears, a pair of extrusion wheels and a transmission member. One of the pair of bevel gears is connected to the torque output end of the extrusion mechanism, and one of the pair of bevel gears is meshed with the other through bevel teeth; the other of the pair of bevel gears is transmission-connected to one of the pair of extrusion wheels, and the pair of extrusion wheels are used to clamp and extrude consumables; the transmission member is connected to the other of the pair of extrusion wheels to adjust the clamping state of the pair of extrusion wheels on the consumables.

[0070] Furthermore, the extrusion mechanism of the present application is provided with a pair of helical gears connecting the torque output end and a pair of extrusion wheels, so that the torque outputted by the torque output end can be smoothly transmitted to the extrusion wheel, reducing the vibration during the transmission process, reducing the vibration intensity of the extrusion mechanism as a whole and further reducing the vibration intensity transmitted from the extrusion wheel to the consumables, improving the stability and reliability of the extrusion mechanism, reducing the vibration intensity transmitted to the 3D printing nozzle and avoiding the vibration marks generated during the printing process, and improving the quality of 3D printing. One of the pair of extrusion wheels is connected to the torque output end through a pair of helical gears, and the other is connected to the transmission member, which is used to adjust the clamping state of the pair of extrusion wheels on the consumables, and the two extrusion wheels cooperate with each other to achieve smooth extrusion of the consumables.

[0071] Those skilled in the art can understand that "3D printing" refers to a technology that uses a digital model file as the basis, and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0072] The following will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0073] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0074] like Figures 1 to 7 As shown, an embodiment of the present application provides an extrusion mechanism 10, which is used to extrude consumables (not shown). The extrusion mechanism 10 includes a bracket 14, a transmission member 15, a reset member 17, a driving member 16, a pair of bevel gears 11 and a pair of extrusion wheels 12. The transmission member 15 and the reset member 17 are arranged on the same side of the bracket 14, the functional body 161 of the driving member 16 is arranged on the other side of the bracket 14, the output shaft 162 of the driving member 16 passes through the bracket 14 and is transmission-connected to the pair of bevel gears 11 accommodated in the bracket 14, the pair of extrusion wheels 12 are drivingly connected to the pair of bevel gears 11, the pair of extrusion wheels 12 are located on the side of the pair of bevel gears 11 away from the functional body 161 of the driving member 16, and one of the pair of extrusion wheels 12 is connected to the transmission member 15.

[0075] In one embodiment, one of the pair of helical gears 11 is connected to the torque output end of the extrusion mechanism 10, and one of the pair of helical gears 11 is meshed with the other through helical teeth. The other of the pair of helical gears 11 is transmission-connected to one of the pair of extrusion wheels 12, and the pair of extrusion wheels 12 are used to clamp and extrude the consumables. The transmission member 15 is connected to the other of the pair of extrusion wheels 12, and is used to adjust the clamping state of the pair of extrusion wheels 12 on the consumables.

[0076] In this embodiment, the extrusion mechanism 10 has a transmission channel 101, which is used to transmit consumables (not shown). The transmission channel 101 is located between a pair of extrusion wheels 12, and the transmission channel 101 is shown as a straight line. It can be understood that the specific shape of the transmission channel 101 can be adjusted according to the transmission requirements of the consumables and the structure of the extrusion mechanism 10.

[0077] It can be understood that the extrusion mechanism 10 of the present application is provided with a pair of bevel gears 11 connecting the torque output end and the pair of extrusion wheels 12, so that the torque output from the torque output end can be smoothly transmitted to the pair of extrusion wheels 12, reducing the vibration during the transmission process, reducing the overall vibration intensity of the extrusion mechanism 10 and further reducing the vibration intensity transmitted to the consumables by the pair of extrusion wheels 12, improving the stability and reliability of the extrusion mechanism 10, reducing the vibration intensity transmitted to the 3D printing nozzle and avoiding the vibration marks generated during the printing process, and improving the 3D printing quality. One of the pair of extrusion wheels 12 is connected to the torque output end through a pair of bevel gears 11, and the other is connected to the transmission member 15, which is used to adjust the clamping state of the pair of extrusion wheels 12 on the consumables, and realize the smooth extrusion of the consumables through the cooperation of the pair of extrusion wheels 12.

[0078] In one embodiment, the pair of helical gears 11 includes a first transmission gear 111 and a second transmission gear 112. The first transmission gear 111 is drivingly connected to the torque output end of the extrusion mechanism 10, and the second transmission gear 112 is meshed with the first transmission gear 111, and the first transmission gear 111 and the second transmission gear 112 are meshed through helical teeth.

[0079] In this embodiment, the axes of the first transmission gear 111 and the second transmission gear 112 can be arranged in parallel, and the first transmission gear 111 and the second transmission gear 112 both have teeth that are inclined relative to their respective axes. Specifically, the first transmission gear 111 and the second transmission gear 112 are both cylindrical helical gears, and the tooth lines are wound along the cylinder and are spirally wound on the cylinder; the first transmission gear 111 includes a first cylinder 1111 and first helical teeth 1112, the first cylinder 1111 is cylindrical, and the first helical teeth 1112 are arranged on the outside of the first cylinder 1111 and are inclined relative to its axis, and the inclination angle ranges from 5° to 35°, and can further be 8°. to 25° or can be 25° to 35°, and can specifically be 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°; the second transmission gear 112 includes a second cylinder 1121 and a second bevel gear 1122. The second cylinder 1121 is cylindrical, and the second bevel teeth 1122 are arranged outside the second cylinder 1121 and are inclined relative to the axis thereof, and the inclination angle ranges from 5° to 35°, and can further be 8° to 25° or can be 25° to 35°, and can specifically be 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°; the inclination directions of the first bevel tooth 1112 and the second bevel tooth 1122 can be opposite, or the inclination directions of the first bevel tooth 1112 and the second bevel tooth 1122 can be tangent symmetrical compared to the meshing surface of the first transmission gear 111 and the second transmission gear 112, so that the first transmission gear 111 and the second transmission gear 112 can mesh.

[0080] It can be understood that both the first transmission gear 111 and the second transmission gear 112 are helical gears, which have the advantages of smooth transmission, less impact, vibration and noise, high transmission efficiency, strong load capacity and stable operation. The first transmission gear 111 and the second transmission gear 112 mesh with each other, which can not only realize the transmission of torque output, but also reduce vibration and improve the stability of the transmission process of the pair of helical gears 11. Furthermore, the vibration transmitted from the pair of helical gears 11 to the pair of extrusion wheels 12 is reduced or eliminated, the vibration transmitted from the pair of extrusion wheels 12 to the consumables is reduced or eliminated, and the vibration transmitted from the consumables to the 3D printing nozzle is reduced or eliminated, which reduces or avoids the vibration marks generated during 3D printing and improves the printing effect.

[0081] In one embodiment, the pair of extrusion wheels 12 includes a first extrusion wheel 121 and a second extrusion wheel 122, the first extrusion wheel 121 is in transmission connection with the second transmission gear 112, and the second extrusion wheel 122 is connected to the transmission member 15. The first extrusion wheel 121 and the second extrusion wheel 122 are arranged at intervals to cooperate to clamp and extrude the consumables.

[0082] In this embodiment, the first extrusion wheel 121 and the second extrusion wheel 122 may have substantially the same or completely the same size, and the sides of the first extrusion wheel 121 and the second extrusion wheel 122 both have a recessed groove structure 123. The first extrusion wheel 121 and the second extrusion wheel 122 are arranged side by side, so that the two recessed groove structures 123 match so that they can better clamp and transfer the consumables.

[0083] Specifically, the first extrusion wheel 121 can be rotatably connected to the bracket 14, and the first extrusion wheel 121 is fixed to the bracket 14 through parts such as a rotating shaft or a latch, so that the first extrusion wheel 121 can rotate relative to the bracket 14 but its overall position relative to the bracket 14 is relatively fixed. At the same time, the second extrusion wheel 122 is movably connected to the bracket 14 through a transmission member 15, so that the second extrusion wheel 122 can be driven by the transmission member 15 to move closer to or farther away from the first extrusion wheel 121. The first extrusion wheel 121 and the second extrusion wheel 122 are arranged side by side, so that the two recessed groove structures 123 are positioned correspondingly, so that the gap between the first extrusion wheel 121 and the second extrusion wheel 122 can accommodate the consumables; the transmission member 15 is driven by the reset member 17 to have a tendency to drive the second extrusion wheel 122 to squeeze the first extrusion wheel 121, so that the first extrusion wheel 121 and the second extrusion wheel 122 can squeeze the consumables from both sides and clamp them; when the transmission member 15 is subjected to other external forces, the transmission member 15 can drive the second extrusion wheel 122 to move toward the side away from the first extrusion wheel 121, so that the gap between the first extrusion wheel 121 and the second extrusion wheel 122 is increased, so as to loosen the clamping of the consumables so that the consumables can be taken out from the first extrusion wheel 121 and the second extrusion wheel 122, so as to facilitate material replacement.

[0084] In one embodiment, the extrusion mechanism 10 further includes a third transmission gear 113 and a fourth transmission gear 124. The third transmission gear 113 is transmission-connected to the second transmission gear 112, and the fourth transmission gear 124 is transmission-connected to the first extrusion wheel 121, and the third transmission gear 113 and the fourth transmission gear 124 are meshed.

[0085] In one embodiment, the third transmission gear 113 and the second transmission gear 112 are coaxially disposed and rotate synchronously with a first transmission shaft 131 , and the fourth transmission gear 124 and the first extrusion wheel 121 are coaxially disposed and rotate synchronously with a second transmission shaft 132 .

[0086] In this embodiment, the first transmission shaft 131 is connected to the third transmission gear 113 and the second transmission gear 112 at the same time, so that the second transmission gear 112 can be connected to the third transmission gear 113 to output the rotation torque. At the same time, the second transmission gear 112 is not directly meshed with the third transmission gear 113, and the third transmission gear 113 can be a non-helical gear. The second transmission shaft 132 is connected to the fourth transmission gear 124 and the first extrusion wheel 121 at the same time, and the fourth transmission gear 124 can be meshed with the third transmission gear 113, and the first transmission gear 111 and the fourth transmission gear 124 can be arranged without meshing.

[0087] In this embodiment, the outer diameter of the third transmission gear 113 can be smaller than the outer diameter of the second transmission gear 112, and the outer diameter of the fourth transmission gear 124 can be slightly larger than the outer diameter of the first extrusion wheel 121, so that the third transmission gear 113 and the fourth transmission gear 124 are arranged between a pair of bevel gears 11 and a pair of extrusion wheels 12 for transmission.

[0088] In this embodiment, the first transmission gear 111 is in transmission connection with the driving member 16, the first transmission gear 111 and the second transmission gear 112 are arranged side by side, the third transmission gear 113 is arranged on the side of the second transmission gear 112 away from the driving member 16, and the third transmission gear 113 and the fourth transmission gear 124 are arranged side by side.

[0089] It can be understood that the first transmission gear 111 and the second transmission gear 112 are arranged side by side to make the output torque of the transmission driving member 16 smoother; the third transmission gear 113 and the fourth transmission gear 124 are arranged side by side to clamp the consumables therewith.

[0090] In one embodiment, the transmission member 15 includes a first end 151 and a second end 152 spaced apart, and the other of the pair of extrusion wheels 12 is connected to the transmission member 15 between the first end 151 and the second end 152. The bracket 14 is movably connected to the first end 151, so that the transmission member 15 can rotate relative to the bracket 14. The reset member 17 is disposed between the bracket 14 and the transmission member 15 and is used to enable the transmission member 15 to drive the pair of extrusion wheels 12 to clamp the consumables, and the force arm from the reset member 17 to the first end 151 is shorter than the force arm from the second end 152 to the first end 151. The reset member 17 can be a spring.

[0091] It can be understood that the first end 151 of the transmission member 15 is rotatably connected to the bracket 14, and the movement of the transmission member 15 can be controlled by bending the second end 152, and further the transmission member 15 drives one of the pair of extrusion wheels 12 to move relative to the other, so as to adjust the degree of clamping of the consumables; the reset member 17 is arranged between the bracket 14 and the transmission member 15 and is used to enable the transmission member 15 to drive the pair of extrusion wheels 12 to clamp the consumables. The pair of extrusion wheels 12 clamping the consumables can improve the stability and accuracy of the consumables transmission, and improve the stability and reliability of the extrusion mechanism 10. The force arm from the reset member 17 to the first end 151 is shorter than the force arm from the second end 152 to the first end 151. When it is necessary to bend the transmission member 15 to separate the pair of extrusion wheels 12 for loading, the resistance force of the reset member 17 can be overcome more easily, thereby improving the convenience of operation of the extrusion mechanism 10.

[0092] In this embodiment, the driving member 16 may be a motor, and the functional body 161 of the driving member 16 may be a part of the motor including a housing (not shown), a coil (not shown), and other common motor structures, and the output shaft 162 of the driving member 16 may be a structure connected to a mover (not shown) to output a rotational torque. It can be understood that the driving member 16 may be a known and feasible structure, and its structure and parameters are not described in detail here.

[0093] In one embodiment, the bracket 14 includes a first main body 141 and a second main body 142, wherein the second main body 142 is disposed on one side of the first main body 141 and connected to the first main body 141. The first main body 141 is provided with a receiving cavity 1410, and a pair of bevel gears 11 are disposed in the receiving cavity 1410. The pair of extrusion wheels 12, the second main body 142 and the transmission member 15 are located on the same side of the first main body 141, and the reset member 17 is disposed between the second main body 142 and the transmission member 15.

[0094] In this embodiment, the first main body 141 is a plate-like structure with a certain thickness. A receiving cavity 1410 is provided in the middle of the first main body 141. The shape of the receiving cavity 1410 roughly corresponds to the pair of helical gears 11. At least part of the receiving cavity 1410 is arranged through the first main body 141, so that the output shaft 162 of the driving member 16 can pass through the first main body 141 to the area where the pair of helical gears 11 are located and drive connected thereto. It can be understood that the bracket 14 can be used for positioning and connecting the pair of helical gears 11, the driving member 16, and the transmission member 15. The receiving cavity 1410 can reduce weight and improve space utilization efficiency while achieving positioning.

[0095] In this embodiment, the second main body 142 is roughly strip-shaped, and the second main body 142 is arranged at one side edge of the first main body 141. The second main body 142 is convex compared to the first main body 141, and is used to cooperate with the transmission member 15, so that the reset member 17 can be clamped between the second main body 142 and the transmission member 15. One end of the reset member 17 is against the second main body 142 fixedly arranged compared to the first main body 141, and the other end is against the transmission member 15 that can be movably arranged compared to the first main body 141, so that the force of the reset member 17 can act on the transmission member 15, and the transmission member 15 has a tendency to drive a pair of extrusion wheels 12 to clamp the consumables. It can be understood that the reset member 17 can be an elastic structure such as a spring or an elastic rubber rod. In this embodiment, the reset member 17 is shown as a spring as an example. The two ends of the reset member 17 can be set corresponding to the concave holes 1420 on the transmission member 15 and the second main body 142 to improve its accuracy and reliability.

[0096] In one embodiment, the first end 151 is rotatably connected to the first main body 141, and the second end 152 is spaced apart from the second main body 142. The reset member 17 is disposed between the second end 152 and the second main body 142, and the reset member 17 is disposed on the side of the pair of extrusion wheels 12 connected to the transmission member 15 away from the first end 151.

[0097] In this embodiment, the transmission member 15 is generally in the shape of a strip with a certain thickness, and the two opposite ends of the strip-shaped transmission member 15 are respectively a first end 151 and a second end 152. The first end 151 is rotatably connected to the first main body 141 through a bolt (not shown) or a rotating shaft (not shown) and other structures, so that the transmission member 15 can rotate relative to the first main body 141; the second end 152 is arranged away from the first end 151 and bent toward the second main body 142, so that the operator can apply force on the second end 152 to bend the transmission member 15 to rotate and compress the reset member 17, so that the pair of transmission wheels are away from each other.

[0098] In one embodiment, the transmission member 15 further includes an installation area 153, which is disposed between the first end 151 and the second end 152. The installation area 153 includes a first connecting plate 1531 and a second connecting plate 1532 that are spaced apart, and the installation area 153 is provided with a through hole 1533 that penetrates the first connecting plate 1531 and the second connecting plate 1532. The second extrusion wheel 122 of the pair of extrusion wheels 12 is disposed between the first connecting plate 1531 and the second connecting plate 1532, and a third transmission shaft 133 sequentially passes through the first connecting plate 1531, the second extrusion wheel 122 and the second connecting plate 1532, so that the second extrusion wheel 122 is fixed to the installation area 153.

[0099] In this embodiment, the second extrusion wheel 122 is arranged between the first connecting plate 1531 and the second connecting plate 1532 and is connected to the transmission member 15 through the third transmission shaft 133, which can not only achieve a tight connection between the second extrusion wheel 122 and the transmission member 15, but also will not interfere with the rotation of the second extrusion wheel 122.

[0100] It can be understood that the transmission member 15 fixed to the main body can rotate with the connection anchor point between the first end 151 and the first main body 141 as the axis, the reset member 17 is located on the side of the second extrusion wheel 122 away from the first end 151, and the second end 152 is further located on the side of the reset member 17 away from the first end 151. Therefore, the force arm from the reset member 17 to the first end 151 is longer than the force arm from the second extrusion wheel 122 to the first end 151, and the force applied by the reset member 17 to the transmission member 15 to drive the second extrusion wheel 122 to approach the first extrusion wheel 121 of the pair of extrusion wheels 12 and clamp the consumables is amplified through the lever principle, thereby improving the stability and reliability of extrusion of the extrusion mechanism 10. Similarly, the force arm from the second end 152 to the first end 151 is longer than the force arm from the reset member 17 to the first end 151. The force of the transmission member 15 compressing the reset member 17 by prying the second end 152 is amplified through the lever principle, making it easier for the operator to pry the transmission member 15, thereby improving the ease of use of the extrusion mechanism 10 while ensuring the stability and reliability of the extrusion mechanism 10.

[0101] Further integration Figure 8 As shown, an embodiment of the present application further provides a 3D printing device 1, which includes a molding platform 18, a driving component 19 and an extrusion mechanism 10 as in any one of the aforementioned embodiments, and the driving component 19 drives the extrusion mechanism 10 to move relative to the molding platform 18.

[0102] In the above, the specific implementation of the present application is described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific implementation of the present application without departing from the spirit and scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. An extrusion mechanism, used for extruding consumables, characterized in that: The extrusion mechanism comprises: a pair of helical gears, one of the pair of helical gears being connected to the torque output end of the extrusion mechanism, and one of the pair of helical gears being meshed with the other through helical teeth; A pair of extrusion wheels, the other of the pair of bevel gears is drivingly connected to one of the pair of extrusion wheels, and the pair of extrusion wheels are used to clamp and extrude consumables; A transmission member is connected to the other one of the pair of extrusion wheels and is used to adjust the clamping state of the pair of extrusion wheels on the consumables.

2. The extrusion mechanism according to claim 1, characterized in that: The pair of helical gears include a first transmission gear and a second transmission gear, the first transmission gear is drivingly connected to the torque output end of the extrusion mechanism, and the second transmission gear is meshed with the first transmission gear. The pair of extrusion wheels include a first extrusion wheel and a second extrusion wheel, the first extrusion wheel is drivingly connected to the second transmission gear, and the second extrusion wheel is connected to the transmission member. The first extrusion wheel and the second extrusion wheel are spaced apart and are used to cooperate to clamp the extruded consumables.

3. The extrusion mechanism according to claim 2, characterized in that: The extrusion mechanism further includes a third transmission gear and a fourth transmission gear, the third transmission gear is transmission-connected to the second transmission gear, the fourth transmission gear is transmission-connected to the first extrusion wheel, and the third transmission gear is meshed with the fourth transmission gear.

4. The extrusion mechanism according to claim 3, characterized in that: The third transmission gear and the second transmission gear are coaxially arranged through a first transmission shaft and rotate synchronously, and the fourth transmission gear and the first extrusion wheel are coaxially arranged through a second transmission shaft and rotate synchronously.

5. The extrusion mechanism according to claim 3, characterized in that: The extrusion mechanism also includes a driving member, which is a torque output end of the extrusion mechanism. The first transmission gear is in transmission connection with the driving member, and the first transmission gear and the second transmission gear are arranged side by side. The third transmission gear is arranged on a side of the second transmission gear away from the driving member, and the third transmission gear and the fourth transmission gear are arranged side by side.

6. The extrusion mechanism according to claim 1, characterized in that: The pair of extrusion wheels include a first end and a second end spaced apart, and the other of the pair of extrusion wheels is connected to the transmission member between the first end and the second end; the extrusion mechanism also includes a bracket, which is movably connected to the first end so that the transmission member can rotate relative to the bracket; the extrusion mechanism also includes a reset member, which is arranged between the bracket and the transmission member and is used to enable the transmission member to drive the pair of extrusion wheels to clamp the consumable material, and the force arm from the reset member to the first end is shorter than the force arm from the second end to the first end.

7. The extrusion mechanism according to claim 6, characterized in that: The bracket includes a first main body and a second main body, the second main body is arranged on one side of the first main body and connected to the first main body, the first main body is provided with a receiving cavity, the pair of bevel gears are arranged in the receiving cavity, the pair of extrusion wheels, the second main body and the transmission member are located on the same side of the first main body, and the reset member is arranged between the second main body and the transmission member.

8. The extrusion mechanism according to claim 7, characterized in that: The first end is rotatably connected to the first main body, the second end is spaced apart from the second main body, the reset member is arranged between the second end and the second main body, and the reset member is arranged on the side of the pair of extrusion wheels connected to the transmission member away from the first end.

9. The extrusion mechanism according to claim 6, characterized in that: The transmission member also includes an installation area, which is arranged between the first end and the second end. The installation area includes a first connecting plate and a second connecting plate that are arranged at intervals. The installation area is provided with a through hole that penetrates the first connecting plate and the second connecting plate. The other of the pair of extrusion wheels is arranged between the first connecting plate and the second connecting plate, and is rotatably connected to the transmission member through a third transmission shaft.

10. A 3D printing device, characterized in that: It comprises a molding platform, a driving component and an extrusion mechanism as described in any one of claims 1 to 9, wherein the driving component drives the extrusion mechanism to move relative to the molding platform.

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