Nozzle structure of 3D printer

Abstract

The utility model discloses a nozzle structure of a 3D printer, and relates to the technical field of 3D printers. The cooling device comprises a gear motor, a motor knob is arranged on one side of the gear motor, a planet wheel assembly is arranged on the other side of the gear motor, a gear seat is arranged on one side of the planet wheel assembly, and a throat pipe cooling fan assembly is arranged on the back face of the gear motor. Through the arrangement of the throat pipe cooling fan assembly, in order to prevent the metal throat pipe from transferring heat of the heating block to other components above, heat needs to be dissipated in time at the upper end of the metal throat pipe, the metal throat pipe is fixed to the spray head fixing base, the spray head fixing base is made of aluminum alloy materials, heat can be transferred more quickly, and the heat dissipation efficiency is improved. The cooling fins are designed on the spray head fixing base, the cooling area can be increased, the throat pipe cooling air blowing fan guides air to the cooling fins on the spray head fixing base from the throat pipe cooling air guiding piece, and the cooling efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of 3D printers, and specifically relates to a nozzle structure of a 3D printer. Background Art

[0002] The 3D printer industry is developing rapidly, and the demand for printing quality is becoming increasingly high. High printing speeds and high precision are both required. The printing quality of a 3D printer depends primarily on the overall performance of the printer's extruder mechanism.

[0003] Chinese patent publication number CN218227881U discloses a wear-resistant high-flow nozzle for 3D printers. The nozzle comprises a high-flow nozzle; an M6 nozzle that fits over the high-flow nozzle and forms an interference fit; and a wear-resistant tungsten steel nozzle, one end of which fits within the M6 nozzle and mates with the high-flow nozzle. The other end extends through the M6 nozzle and outward. This design utilizes an interference fit between copper alloy and tungsten steel to enhance the nozzle's wear resistance, improve print quality, and enhance its service life. Compared to a three-in-one nozzle, this design reduces welding costs and increases extrusion flow, making it more practical.

[0004] However, the performance of the printer nozzle extrusion mechanism is relatively low, and the consumables have a high temperature while in the extrusion mechanism, resulting in poor solidification, thereby reducing the overall performance of the printer.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a 3D printer nozzle structure that solves the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A 3D printer nozzle structure includes: a gear motor, a motor knob provided on one side of the gear motor, a planetary gear assembly provided on the other side of the gear motor, a gear seat provided on one side of the planetary gear assembly, a throat cooling fan assembly provided on the back of the gear motor, a nozzle fixing seat provided on one side of the gear seat, a handle assembly meshingly connected to the surface of the planetary gear assembly, a PCB adapter plate provided on the surface of the gear motor, a nozzle cooling fan provided on the bottom of the gear motor, and a nozzle assembly provided inside the nozzle fixing seat.

[0009] Optionally, the planetary gear assembly includes a planetary gear arranged on the other side of the gear motor, a planetary gear bearing is arranged inside the planetary gear, a planetary carrier is sleeved inside the planetary gear bearing, a planetary carrier front end flange bearing is arranged at one end of the planetary carrier, an extruded driving gear is arranged on the surface of the planetary carrier front end flange bearing, and a planetary carrier end bearing is arranged on the surface of the extruded driving gear.

[0010] Optionally, the throat cooling fan assembly includes a throat cooling air guide member arranged on the back of the gear motor, and a throat cooling air blower fan is arranged on the surface of the throat cooling air guide member.

[0011] Optionally, the handle assembly includes an extrusion follower gear connected to the surface of the extrusion driving gear, the interior of the extrusion follower gear is sleeved with an A extrusion follower gear bearing, one end of the interior of the A extrusion follower gear is provided with an isolation column, one side of the isolation column is provided with a B extrusion follower gear bearing, the interior of the B extrusion follower gear bearing is sleeved with a gear shaft, handles are provided at both ends of the gear shaft, the interior of the bottom end of the handle is sleeved with a handle shaft, the surface of the handle is provided with a gasket, the surface of the gasket is provided with a handle spring, and the interior of the handle spring is sleeved with a hand screw.

[0012] Optionally, the nozzle assembly includes a metal throat arranged inside the nozzle fixing seat, a connecting seat is provided at the bottom of the metal throat, a pressure sensor is provided on one side of the surface of the connecting seat, a ceramic heating plate is provided at the bottom of the connecting seat, a heating block is provided on the surface of the ceramic heating plate, a thermistor is provided inside the heating block, a nozzle is provided at the bottom of the heating block, a heating plate fixing piece is sleeved on the surface of the heating block, and a silicone sleeve is sleeved on the surface of the heating plate fixing piece.

[0013] Optionally, there are three planetary gears and three planetary gear bearings, all of which are arranged on the surface of the planetary carrier and mesh with the gears inside the gear seat.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described below at the same time:

[0015] 1. Through the arrangement of the planetary gear assembly and the handle assembly, the front end of the gear motor output shaft is provided with a gear. When the motor rotates, the gear on the motor shaft drives the three planetary gears on the planetary carrier. In conjunction with the gear seat, the planetary gears rotate on their own and also revolve around the sun, causing the planetary gear assembly to rotate. The extrusion driving gear fixed on the planetary carrier also rotates. The extrusion driving gear on the planetary carrier meshes with the extrusion follower gear on the handle. The two gears rotate toward the middle, and the printing consumables are extruded from the middle of the extrusion groove of the gear, thereby improving the efficiency of consumable extrusion.

[0016] 2. Through the setting of the nozzle assembly, the metal throat and nozzle are fixed to the heating block through their own threads. After the ceramic heating plate heats the heating block to a certain temperature, the thermistor detects the set temperature and the heating block stops heating. When the heating block stops heating and the temperature drops below the set temperature, the heating block is reheated to keep the heating temperature fixed at the set temperature value. A silicone sleeve is placed on the outside of the heating block to better maintain the temperature of the heating block constant. The filament is extruded through the extrusion gear and enters the throat. It passes through the throat and the heating block. The filament softens and is then extruded from the nozzle. Due to the softening of the filament, the smoothness of the extrusion is improved.

[0017] 3. Through the setting of the throat cooling fan assembly, in order to prevent the metal throat from transferring the heat of the heating block to other components above, it is necessary to dissipate heat in time at the upper end of the metal throat. The metal throat is fixed on the nozzle fixing seat. The nozzle fixing seat is made of aluminum alloy, which can transfer heat faster. The nozzle fixing seat is designed with heat sinks to increase the heat dissipation area. The throat heat dissipation blower fan guides the wind from the throat heat dissipation air guide to the heat sink on the nozzle fixing seat, thereby improving the heat dissipation efficiency.

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] In the picture:

[0021] Figure 1 It is a schematic diagram of the overall structure;

[0022] Figure 2 Schematic diagram of the nozzle fixing seat structure;

[0023] Figure 3 Schematic diagram of the structure of the planetary gear assembly;

[0024] Figure 4 Schematic diagram of the handle assembly structure;

[0025] Figure 5 Schematic diagram of the nozzle assembly structure;

[0026] Figure 6 This is a schematic diagram of the throat cooling fan assembly structure.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Gear motor; 2. Motor knob; 3. Planetary gear assembly; 31. Planetary gear; 32. Planetary gear bearing; 33. Planetary carrier; 34. Planetary carrier front flange bearing; 35. Extrusion drive gear; 36. Planetary carrier 33 end bearing; 4. Gear seat; 5. Throat cooling fan assembly; 51. Throat cooling air guide; 52. Throat cooling blower fan; 6. Nozzle fixing seat; 7. Handle assembly; 71. Extrusion follower gear; 72. Extrusion follower gear bearing A; 73. Column; 74, B extrusion follower gear bearing; 75, gear shaft; 76, handle; 77, handle shaft; 78, gasket; 79, handle spring; 710, thumb screw; 8, PCB adapter board; 9, nozzle cooling fan; 10, nozzle assembly; 101, metal throat; 102, connecting seat; 103, pressure sensor; 104, ceramic heating plate; 105, heating block; 106, thermistor; 107, nozzle; 108, heating plate fixing; 109, silicone sleeve.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] See also Figure 1-6As shown, in this embodiment, a 3D printer nozzle structure is provided, including: a gear motor 1, a motor knob 2 is provided on one side of the gear motor 1, a planetary gear assembly 3 is provided on the other side of the gear motor 1, a gear seat 4 is provided on one side of the planetary gear assembly 3, and a throat cooling fan assembly 5 is provided on the back of the gear motor 1. In order to prevent the metal throat 101 from transferring the heat of the heating block 105 to other components above, it is necessary to dissipate heat in time at the upper end of the metal throat 101. The metal throat 101 is fixed on the nozzle fixing seat 6. The nozzle fixing seat 6 is made of aluminum alloy and can transfer heat faster. The nozzle fixing seat 6 is designed with a heat sink to increase the heat dissipation area. The throat heat dissipation blower fan 52 guides the wind from the throat heat dissipation air guide 51 to the heat sink on the nozzle fixing seat 6 to improve the heat dissipation efficiency. A nozzle fixing seat 6 is provided on one side of the gear seat 4, and the surface of the planetary gear assembly 3 is meshed and connected with Handle assembly 7, the surface of the gear motor 1 is provided with a PCB adapter plate 8, the bottom of the gear motor 1 is provided with a nozzle cooling fan 9, the inside of the nozzle fixing seat 6 is provided with a nozzle assembly 10, the metal throat 101 and the nozzle 107 are fixed on the heating block 105 by their own threads, and the ceramic heating plate 104 heats the heating block 105 to a certain temperature. After the thermistor 106 detects the set temperature, the heating block 105 stops heating. When the heating block 105 stops heating, the temperature drops below the set temperature, and the heating block 105 is reheated to keep the heating temperature fixed at the set temperature value. A silicone sleeve 109 is provided on the outside of the heating block 105, which can better keep the temperature of the heating block 105 constant. The consumable is extruded through the extrusion gear and enters the throat. From the throat, it passes through the heating block 105, the consumable softens, and is then extruded from the nozzle 107. Due to the softening of the consumable, the smoothness of the extrusion is improved.

[0032] One aspect of the application of this embodiment is as follows: the front end of the output shaft of the gear motor 1 is provided with a gear. When the motor rotates, the gear on the motor shaft drives the three planetary gears 31 on the planetary carrier 33. In conjunction with the gear seat 4, the planetary gears 31 rotate on their own while also revolving around the sun, causing the planetary gear assembly 3 to rotate. The extrusion driving gear 35 fixed to the planetary carrier 33 also rotates. The extrusion driving gear 35 on the planetary carrier 33 meshes with the extrusion follower gear 71 on the handle 76. The two gears rotate toward the middle, and the printing consumables are extruded from the middle of the extrusion groove of the gear, thereby improving the efficiency of consumable extrusion. It should be noted that all electrical equipment involved in this application can be powered by batteries or external power supplies.

[0033] like Figure 2 As shown, a motor knob 2 is provided on one side of the gear motor 1 of this embodiment. The motor knob 2 is an injection molded part with a circular hole in the center of the part. It has an interference fit with the output shaft of the gear motor 1. The output shaft of the gear motor 1 is pressed into the motor knob 2 by pressure.

[0034] like Figure 2 As shown, in this embodiment, there are three planetary gears 31 and three planetary gear bearings 32, all of which are arranged on the surface of the planetary carrier 33 and mesh with the gears inside the gear seat 4. The planetary gear assembly 3 is fixed to the gear motor 1 through the gear seat 4 with long screws.

[0035] Example 1:

[0036] In this embodiment, if Figure 3 and 4 As shown, the planetary gear assembly 3 includes a planetary gear 31 arranged on the other side of the gear motor 1, a planetary gear bearing 32 is arranged inside the planetary gear 31, and a planetary carrier 33 is sleeved inside the planetary gear bearing 32. A planetary carrier front end flange bearing 34 is provided at one end of the planetary carrier 33, and an extrusion driving gear 35 is provided on the surface of the planetary carrier front end flange bearing 34. A planetary carrier end bearing 36 is provided on the surface of the extrusion driving gear 35. The handle assembly 7 includes an extrusion follower gear 71 connected to the surface of the extrusion driving gear 35, an A extrusion follower gear bearing 72 is sleeved inside the extrusion follower gear 71, an isolation column 73 is provided at one end of the A extrusion follower gear 71, and a B extrusion follower gear bearing 74 is provided on one side of the isolation column 73. The gear shaft is sleeved inside the B extrusion follower gear bearing 74. 75. Handles 76 are provided at both ends of the gear shaft 75. A handle shaft 77 is sleeved inside the bottom end of the handle 76. A gasket 78 is provided on the surface of the handle 76. A handle spring 79 is provided on the surface of the gasket 78. A hand screw 710 is sleeved inside the handle spring 79. The front end of the output shaft of the gear motor 1 is provided with a gear. When the motor rotates, the gear on the motor shaft drives the three planetary gears 31 on the planetary carrier 33. In conjunction with the gear seat 4, the planetary gears 31 rotate while also revolving, causing the planetary gear assembly 3 to rotate. The extrusion driving gear 35 mounted on the planetary carrier 33 also rotates. The extrusion driving gear 35 on the planetary carrier 33 meshes with the extrusion follower gear 71 on the handle 76. The two gears rotate toward the middle, and the printing consumables are extruded from the middle of the extrusion groove of the gear, thereby improving the efficiency of consumable extrusion.

[0037] Example 2:

[0038] In this embodiment, if Figure 5As shown, the nozzle assembly 10 includes a metal throat 101 arranged inside the nozzle fixing seat 6, a connecting seat 102 is provided at the bottom of the metal throat 101, a pressure sensor 103 is provided on one side of the surface of the connecting seat 102, a ceramic heating plate 104 is provided at the bottom of the connecting seat 102, a heating block 105 is provided on the surface of the ceramic heating plate 104, a thermistor 106 is provided inside the heating block 105, a nozzle 107 is provided at the bottom of the heating block 105, a heating plate fixing piece 108 is sleeved on the surface of the heating plate fixing piece 108, a silicone sleeve 109 is sleeved on the surface of the heating plate fixing piece 108, and the metal throat 101 and the nozzle 107 are connected by their own threads. Fixed on the heating block 105, the ceramic heating plate 104 heats the heating block 105 to a certain temperature, and after the thermistor 106 detects the set temperature, the heating block 105 stops heating. When the heating block 105 stops heating and the temperature drops below the set temperature, the heating block 105 is reheated to keep the heating temperature fixed at the set temperature value. A silicone sleeve 109 is provided on the outside of the heating block 105 to better maintain the temperature of the heating block 105 constant. The consumables are extruded by the extrusion gear and enter the throat, and pass through the heating block 105 from the throat. The consumables soften and are then extruded from the nozzle 107. Due to the softening of the consumables, the smoothness of the extrusion is improved.

[0039] like Figure 6 As shown, the throat cooling fan assembly 5 includes a throat cooling air guide 51 arranged on the back of the gear motor 1, and a throat cooling air blower fan 52 is provided on the surface of the throat cooling air guide 51. In order to prevent the metal throat 101 from transferring the heat of the heating block 105 to other components above, it is necessary to dissipate heat in time at the upper end of the metal throat 101. The metal throat 101 is fixed on the nozzle fixing seat 6. The nozzle fixing seat 6 is made of aluminum alloy and can transfer heat faster. The nozzle fixing seat 6 is designed with heat sinks to increase the heat dissipation area. The throat cooling air blower fan 52 guides the wind from the throat cooling air guide 51 to the heat sink on the nozzle fixing seat 6, thereby improving the heat dissipation efficiency.

[0040] The present invention is not limited to the above-described embodiments. Any structural changes made under the guidance of the present invention should be understood by anyone. Any technical solution that is the same or similar to the present invention falls within the scope of protection of the present invention. The technology, shape, and structure not described in detail in the present invention are all known technologies.

Claims

1. A 3D printer nozzle structure, characterized in that: include: A gear motor (1) is provided with a motor knob (2) on one side of the gear motor (1), a planetary gear assembly (3) is provided on the other side of the gear motor (1), a gear seat (4) is provided on one side of the planetary gear assembly (3), a throat cooling fan assembly (5) is provided on the back of the gear motor (1), a nozzle fixing seat (6) is provided on one side of the gear seat (4), a handle assembly (7) is meshedly connected on the surface of the planetary gear assembly (3), a PCB adapter plate (8) is provided on the surface of the gear motor (1), a nozzle cooling fan (9) is provided on the bottom of the gear motor (1), and a nozzle assembly (10) is provided inside the nozzle fixing seat (6).

2. A 3D printer nozzle structure according to claim 1, characterized in that: The planetary gear assembly (3) comprises a planetary gear (31) arranged on the other side of the gear motor (1); a planetary gear bearing (32) is arranged inside the planetary gear (31); a planetary carrier (33) is sleeved inside the planetary gear bearing (32); a planetary carrier front end flange bearing (34) is arranged at one end of the planetary carrier (33); an extruded driving gear (35) is arranged on the surface of the planetary carrier front end flange bearing (34); and a planetary carrier end bearing (36) is arranged on the surface of the extruded driving gear (35).

3. A 3D printer nozzle structure according to claim 1, characterized in that: The throat heat dissipation fan assembly (5) comprises a throat heat dissipation air guide (51) arranged on the back of the gear motor (1), and a throat heat dissipation air blower fan (52) is arranged on the surface of the throat heat dissipation air guide (51).

4. A 3D printer nozzle structure according to claim 1, characterized in that: The handle assembly (7) includes an extrusion follower gear (71) connected to the surface of the extrusion driving gear (35), an A extrusion follower gear bearing (72) is sleeved inside the extrusion follower gear (71), an isolation column (73) is provided at one end inside the A extrusion follower gear (71), a B extrusion follower gear bearing (74) is provided on one side of the isolation column (73), a gear shaft (75) is sleeved inside the B extrusion follower gear bearing (74), handles (76) are provided at both ends of the gear shaft (75), a handle shaft (77) is sleeved inside the bottom end of the handle (76), a gasket (78) is provided on the surface of the handle (76), a handle spring (79) is provided on the surface of the gasket (78), and a hand screw (710) is sleeved inside the handle spring (79).

5. The nozzle structure of a 3D printer according to claim 1, characterized in that: The nozzle assembly (10) comprises a metal throat (101) arranged inside a nozzle fixing seat (6); a connecting seat (102) is provided at the bottom of the metal throat (101); a pressure sensor (103) is provided on one side of the surface of the connecting seat (102); a ceramic heating plate (104) is provided at the bottom of the connecting seat (102); a heating block (105) is provided on the surface of the ceramic heating plate (104); a thermistor (106) is provided inside the heating block (105); a nozzle (107) is provided at the bottom of the heating block (105); a heating plate fixing piece (108) is sleeved on the surface of the heating block (105); and a silicone sleeve (109) is sleeved on the surface of the heating plate fixing piece (108).

6. A 3D printer nozzle structure according to claim 2, characterized in that: There are three planetary gears (31) and three planetary gear bearings (32), which are all arranged on the surface of the planetary carrier (33) and mesh with the gears inside the gear seat (4).

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