Quick disassembly and assembly hot end assembly of 3D printer, printing head assembly and 3D printer

Abstract

The utility model discloses a quick disassembly and assembly hot end assembly of a 3D printer, a printing head assembly and the 3D printer. The quick disassembly and assembly hot end assembly of the 3D printer comprises a heat dissipation part and a heat dissipation part fixing base arranged outside the heat dissipation part. The first dismounting group is arranged on the heat dissipation part; and the second dismounting and mounting group is arranged on the heat dissipation part fixing seat, the first dismounting and mounting group and the second dismounting and mounting group are used for rotating fit, and dismounting and mounting of the heat dissipation part and the heat dissipation part fixing seat are achieved through the first dismounting and mounting group and the second dismounting and mounting group. According to the nozzle assembly, the heat dissipation part can be rapidly disassembled and assembled on the heat dissipation part fixing base without auxiliary work such as a wrench, then rapid disassembly and replacement of the nozzle assembly are achieved, the disassembly and assembly time of a user is saved, the model printing efficiency of the user is improved, and the user experience feeling is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printers, in particular to a 3D printer quick disassembly hot end component, a print head component and a 3D printer. Background Art

[0002] With the popularity of FDM 3D printers, more and more users are using 3D printers. The existing FDM 3D printers are complicated to maintain and repair. Bolts are usually used to tighten the nozzle assembly. The user replacement process is relatively complicated and the replacement time is long. The tightness of the bolts after replacement affects the stability of the nozzle assembly, which can easily lead to failures such as leakage. It is difficult for users without a certain mechanical foundation and hands-on ability to replace nozzles, throats and other parts, which makes it difficult to repair when a failure occurs, affecting the user experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] In view of this, the utility model provides a 3D printer quick disassembly and assembly hot end assembly, a print head assembly and a 3D printer, wherein the 3D printer quick disassembly and assembly hot end assembly does not require the use of auxiliary work such as a wrench, and can achieve quick disassembly and assembly of the heat dissipation part on the heat dissipation part fixing seat, thereby achieving quick disassembly and replacement of the nozzle assembly, saving the user's disassembly and assembly time, improving the user's efficiency in printing models, and enhancing the user experience.

[0005] Specifically, the following technical solutions are included:

[0006] The embodiment of the first aspect of the utility model provides a 3D printer quick disassembly hot end assembly, comprising a heat dissipation part and a heat dissipation part fixing seat externally arranged on the heat dissipation part;

[0007] A first disassembly and assembly group is arranged on the heat dissipation part;

[0008] The second disassembly and assembly group is arranged on the heat dissipation part fixing seat. The first disassembly and assembly group and the second disassembly and assembly group are used for rotational cooperation. The heat dissipation part and the heat dissipation part fixing seat can be disassembled and assembled through the first disassembly and assembly group and the second disassembly and assembly group.

[0009] Optionally, the heat dissipation portion fixing seat comprises a fixing seat base, and the second disassembly and assembly group comprises a clamping groove, and the clamping groove is arranged on a side of the fixing seat base facing the heat dissipation portion;

[0010] The heat dissipation part includes a heat dissipation body and a first disassembly and assembly group that are interconnected. The heat dissipation part fixing seat is externally arranged on the first disassembly and assembly group. The first disassembly and assembly group includes a limiting boss that is clamped with the clamping groove. One end of the heat dissipation body away from the first disassembly and assembly group is connected to the nozzle assembly.

[0011] Optionally, the snap-in slot includes a first snap-in channel and a second snap-in channel, the first snap-in channel and the second snap-in channel are connected, the second snap-in channel is arranged away from the heat dissipation body, and the limiting boss slides from the first snap-in channel into the second snap-in channel to realize the connection between the heat dissipation part and the heat dissipation part fixing seat.

[0012] Optionally, the heat dissipation part fixing seat further includes a cover plate, the cover plate is located at one end close to the second insertion channel, and a through hole is provided on the cover plate.

[0013] Optionally, the second disassembly and assembly group further includes a positioning connection member, the positioning connection member is located in the base of the fixing seat, the positioning connection member is arranged toward the heat dissipation portion, the positioning connection member can be extended and retracted in the base of the fixing seat, and the positioning connection member protrudes from the base of the fixing seat when extended;

[0014] The first assembly and disassembly group further comprises a positioning hole, and the positioning hole is used for matching and connecting with the positioning connector.

[0015] Optionally, the positioning connector includes a receiving frame and a sphere, part of the sphere is located outside the receiving frame, the receiving frame and the sphere are connected via an elastic member, the receiving frame is disposed within a base of the fixing seat, and the sphere outside the receiving frame protrudes from the base of the fixing seat.

[0016] Optionally, the first disassembly and assembly group is provided with a sliding ring track, the positioning hole is located on the sliding ring track, the sliding ring track is located between the heat dissipation body and the limiting boss, and the ball is used to move on the sliding ring track and then get stuck in the positioning hole.

[0017] Optionally, the heat dissipation portion further includes a guiding slope, the guiding slope is located at an end of the connection portion away from the heat dissipation body, the limiting boss is located on the guiding slope, and the limiting boss extends toward the direction of the fixing seat base.

[0018] Optionally, the heat dissipation part fixing seat further comprises a connection block, wherein the connection block is connected to the fixing seat base, and a bolt hole is provided on the connection block, and the bolt hole extends in a direction away from the heat dissipation part.

[0019] Optionally, the heat dissipation portion further includes a rotating handle, and the rotating handle is arranged between the heat dissipation body and the connecting portion.

[0020] Optionally, the nozzle assembly comprises:

[0021] A throat, one end of which is disposed in the heat dissipation portion;

[0022] A heating block is arranged at one end of the heat dissipation part away from the heat dissipation part fixing seat, and the other end of the throat is connected to the heating block;

[0023] A nozzle is arranged in the heating block, the nozzle is located at an end of the heating block away from the heat dissipation part, and the nozzle and the throat are coaxially arranged.

[0024] Optionally, the nozzle assembly further comprises:

[0025] A heating tube is arranged in the heating block, and is used to provide a heat source for the heating block.

[0026] Optionally, the nozzle assembly further comprises:

[0027] The temperature sensor is arranged in the heating block, and the temperature sensor is located at one end of the heating block close to the nozzle.

[0028] Optionally, the nozzle assembly further comprises a Teflon tube inserted into the throat and the nozzle, and one end of the Teflon tube away from the nozzle extends out of the heat dissipation portion fixing seat.

[0029] The second embodiment of the utility model provides a print head assembly, comprising:

[0030] Such as the above-mentioned 3D printer quick disassembly and assembly of the hot end assembly;

[0031] An extruder assembly is located at an end of the 3D printer quick disassembly hot end assembly away from the nozzle;

[0032] A print head slider assembly, the 3D printer quick disassembly hot end assembly and the extruder assembly are fixed on the print head slider assembly.

[0033] Optionally, it also includes:

[0034] A circuit board is located at one side of the extruder assembly. A wire card is clamped on the circuit board. The wire card is located at an end of the circuit board away from the 3D printer's quick-disassembly hot end assembly. The circuit board is fixedly connected to the print head slider assembly.

[0035] Optionally, it also includes:

[0036] A proximity sensor is arranged opposite to the circuit board, and the proximity sensor is fixedly connected to the print head slider assembly.

[0037] Optionally, it also includes:

[0038] A cooling fan is arranged between the 3D printer quick disassembly and assembly hot end assembly and the print head slider assembly, and the cooling fan is fixedly connected to the print head slider assembly.

[0039] A third aspect and embodiment of the present utility model provides a 3D printer, comprising:

[0040] The printer body; and

[0041] As the print head assembly described above, the print head assembly is arranged in the slideway of the printer body.

[0042] The embodiment of the utility model provides a 3D printer quick disassembly hot end assembly, a print head assembly and a 3D printer, wherein the 3D printer quick disassembly hot end assembly includes a heat sink and a heat sink fixing seat external to the heat sink, a second disassembly group is provided on the side of the heat sink fixing seat facing the heat sink, a second disassembly group is provided on the side of the heat sink facing the heat sink fixing seat, and the first disassembly group and the second disassembly group can achieve rotational cooperation. The heat sink and the heat sink fixing seat can be quickly disassembled and assembled through the rotational cooperation of the first disassembly group and the second disassembly group, thereby improving the replacement efficiency of the nozzle assembly at one end of the heat sink away from the heat sink fixing seat, and at the same time, the disassembly and assembly are realized by the rotational cooperation, the operation is simple and convenient, the user's disassembly and assembly time is saved, the user's printing efficiency of the model is improved, and the user experience is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 It is a structural schematic diagram of a 3D printer quick disassembly and assembly hot end assembly according to an embodiment of the utility model;

[0045] Figure 2 for Figure 1 An exploded schematic diagram of the illustrated embodiment;

[0046] Figure 3 for Figure 1 a top view of the illustrated embodiment;

[0047] Figure 4 for Figure 3 AA schematic diagram of the embodiment shown without the insulation cover;

[0048] Figure 5 for Figure 1 a front view of the illustrated embodiment;

[0049] Figure 6 for Figure 5 BB schematic diagram of the illustrated embodiment;

[0050] Figure 7 It is an exploded schematic diagram of a heat dissipation fixing seat according to an embodiment of the utility model;

[0051] Figure 8 It is a schematic diagram of a heat dissipation fixing seat according to an embodiment of the utility model;

[0052] Fig. 9 is a schematic diagram of a heat dissipation unit according to an embodiment of the utility model;

[0053] Fig.10 is a schematic diagram of a print head assembly according to an embodiment of the utility model;

[0054] Fig.11 for Fig.10 a front view of the illustrated embodiment;

[0055] Fig.12 for Fig.10 An exploded schematic diagram of the illustrated embodiment;

[0056] Fig.13a This is a schematic diagram of a heat dissipation unit before installation according to an embodiment of the utility model;

[0057] Fig.13b It is a schematic diagram of a heat dissipation unit after installation according to an embodiment of the utility model.

[0058] in, Figures 1 to 13b The corresponding relationship between the reference numerals and the component names is as follows:

[0059] 100 quick disassembly and assembly of hot end assembly, 101 insulation sleeve, 102 nozzle, 103 heating block, 104 top screw, 105 temperature sensor, 106 flat head screw, 107 heating tube, 108 throat, 109 heat dissipation part, 1091 limiting boss, 1092 rotating handle, 1093 positioning hole, 1094 sliding into circular track, 1095 guide slope, 1096 heat dissipation body, 110 heat dissipation part fixing seat, 1101 first card-in channel, 1102 second card-in channel, 1103 positioning connector, 1104 connecting block, 1105 bolt hole, 1106 cover plate, 1107 through hole, 1108 fixing seat base, 111 Teflon tube, 200 extruder assembly, 300 circuit board, 400 line card, 500 print head slider assembly, 600 cooling fan, 700 proximity sensor. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] Before further describing the embodiments of the present invention in detail, the directional terms involved in the embodiments of the present invention, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the protection scope of the present invention.

[0062] In order to make the technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0063] Figure 1 It is a structural schematic diagram of a 3D printer quick disassembly and assembly hot end assembly according to an embodiment of the utility model;

[0064] like Figure 1 As shown, one embodiment of the utility model provides a 3D printer quick disassembly hot end assembly 100, which includes a heat dissipation part 109 and a heat dissipation part fixing seat 110 externally arranged on the heat dissipation part 109;

[0065] The first disassembly and assembly group is arranged on the heat dissipation part 109;

[0066] The second disassembly and assembly group is arranged on the heat dissipation part fixing seat 110 . The first disassembly and assembly group and the second disassembly and assembly group are used for rotational cooperation. The heat dissipation part 109 and the heat dissipation part fixing seat 110 can be disassembled and assembled by the first disassembly and assembly group and the second disassembly and assembly group.

[0067] The 3D printer quick disassembly hot end assembly includes a heat sink 109 and a heat sink fixing seat 110 external to the heat sink 109, a second disassembly group is provided on the side of the heat sink fixing seat 110 facing the heat sink 109, and a second disassembly group is provided on the side of the heat sink 109 facing the heat sink fixing seat 110, and the first disassembly group and the second disassembly group can achieve rotational cooperation. The heat sink 109 and the heat sink fixing seat 110 can be quickly disassembled and assembled by the rotational cooperation of the first disassembly group and the second disassembly group, thereby improving the replacement efficiency of the nozzle assembly at the end of the heat sink 109 away from the heat sink fixing seat 110, and at the same time, the disassembly and assembly are realized by the rotational cooperation, the operation is simple and convenient, the user's disassembly and assembly time is saved, the user's printing efficiency of the model is improved, and the user experience is enhanced.

[0068] Specifically, during installation, the heat dissipation part 109 is rotated, and the first disassembly and assembly group rotates together with the heat dissipation part 109, thereby realizing the rotational connection between the first disassembly and assembly group and the second disassembly and assembly group. Since the second disassembly and assembly group is located on the heat dissipation part fixing seat 110, the heat dissipation part 109 and the heat dissipation part fixing seat 110 are connected. During disassembly, the heat dissipation part 109 is rotated in the opposite direction, so that the first disassembly and assembly group on the heat dissipation part 109 rotates in the opposite direction, thereby realizing the separation of the first disassembly and assembly group from the second disassembly and assembly group, thereby realizing the disassembly of the heat dissipation part 109 and the heat dissipation part fixing seat 110.

[0069] It can be understood that when the first disassembly assembly group rotates clockwise, it is installation, and when the first disassembly assembly group rotates counterclockwise, it is disassembly; it can also be installed when the first disassembly assembly group rotates counterclockwise, and when the first disassembly assembly group rotates clockwise, it is disassembly.

[0070] Figure 7 It is an exploded schematic diagram of a heat dissipation fixing seat according to an embodiment of the utility model; Figure 8 It is a schematic diagram of a heat dissipation fixing seat according to an embodiment of the utility model; Fig. 9 Schematic diagram of a heat dissipation unit according to an embodiment of the present invention.

[0071] In a possible implementation, Figures 7 to 9 As shown, the heat dissipation portion fixing seat 110 includes a fixing seat base 1108, and the second disassembly assembly group includes a snap-in groove, which is arranged on a side of the fixing seat base 1108 facing the heat dissipation portion 109;

[0072] The heat dissipation part 109 includes a heat dissipation body 1096 and a first disassembly and assembly group that are interconnected. The heat dissipation part fixing seat 110 is externally arranged on the first disassembly and assembly group. The first disassembly and assembly group includes a limiting boss 1091, which is clamped with the clamping groove. The end of the heat dissipation body 1096 away from the first disassembly and assembly group is connected to the nozzle assembly.

[0073] Among them, the 3D printer quick disassembly and assembly hot end component 100 includes a heat dissipation part 109 and a heat dissipation part fixing seat 110 external to the heat dissipation part 109, and a second disassembly and assembly group is provided on the side of the heat dissipation part fixing seat 110 facing the heat dissipation part 109, and the second disassembly and assembly group includes a clamping groove, and a first disassembly and assembly group is provided on the side of the heat dissipation part 109 facing the heat dissipation part fixing seat, and the first disassembly and assembly group includes a limiting boss 1091. Through the cooperation of the limiting boss 1091 and the clamping groove, the axial movement and rotational movement of the heat dissipation part 109 can be limited, thereby realizing the rotational connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110, and the heat dissipation part 109 and the heat dissipation part fixing seat 110 can be realized by rotating the heat dissipation part 109, thereby improving the replacement efficiency of the nozzle assembly at the end of the heat dissipation part 109 away from the heat dissipation part fixing seat 110, saving the user's disassembly and assembly time, improving the user's printing efficiency of the model, and enhancing the user experience.

[0074] Specifically, the limiting boss 1091 on the heat dissipation unit 109 slides into the snap-in groove, so that the heat dissipation unit fixing seat 110 is covered on the first disassembly and assembly group of the heat dissipation unit 109. At the same time, by rotating a certain angle, the limiting boss 1091 is snapped into the snap-in groove, thereby realizing a detachable connection between the heat dissipation unit 109 and the heat dissipation unit fixing seat 110. Among them, an installation direction indicator is provided on the side of the fixing seat base 1108 facing away from the second disassembly and assembly group, that is, the rotation direction of the heat dissipation unit 109 during installation, so that the user can easily identify the installation direction. The installation direction can be counterclockwise rotation or clockwise rotation of the heat dissipation unit 109 to realize the connection between the heat dissipation unit 109 and the heat dissipation unit fixing seat 110. Therefore, when disassembly is required, the heat dissipation unit 109 can be rotated in the opposite direction to realize the disassembly of the heat dissipation unit 109 and the heat dissipation unit fixing seat 110. Subsequently, the heat dissipation unit 109 and the nozzle assembly connected to the heat dissipation unit 109 can be disassembled and assembled by hand, thereby improving the disassembly and assembly efficiency, improving the efficiency of users printing models, and enhancing the user experience.

[0075] It should be noted that the heat dissipation body 1096 can adopt a ring-shaped fin design, and the heat dissipation body 1096 can also adopt triangular, rectangular, square, polygonal or irregular shaped fins, which can increase the heat dissipation area and speed up the heat dissipation efficiency. There is no limitation here.

[0076] In a possible implementation, Figure 7 and Figure 8 As shown, the snap-in slot includes a first snap-in channel 1101 and a second snap-in channel 1102 . The first snap-in channel 1101 and the second snap-in channel 1102 are connected, and the second snap-in channel 1102 is arranged away from the heat dissipation body 1096 .

[0077] Among them, the first card-in channel 1101 is in the same axial direction as the fixing seat base 1108, and the second card-in channel 1102 is arranged along the circumferential direction of the inner wall of the fixing seat base 1108, and the second card-in channel 1102 extends in the installation direction. Before installation, the limiting boss 1091 is aligned with the first card-in channel 1101 and moved in the direction of the second card-in channel 1102 until it cannot be moved, and then the heat dissipation part 109 is rotated in the installation direction to make the limiting boss 1091 enter the second card-in channel 1102 until the limiting boss 1091 reaches the end of the second card-in channel 1102 away from the first card-in channel 1101, that is, it cannot rotate, that is, the rotation of the heat dissipation part 109 is stopped. , realize the connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110, at this time, the second snap-in channel 1102 limits the axial movement of the heat dissipation part 109, realize the fixed connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110; when disassembling, the heat dissipation part 109 is rotated in the opposite direction according to the installation direction, and the limiting boss 1091 rotates from the second snap-in channel 1102 to the first snap-in channel 1101. When the heat dissipation part 109 cannot rotate, the limiting boss 1091 enters the connection between the first snap-in channel 1101 and the second snap-in channel 1102. At this time, the heat dissipation part 109 is moved in the direction away from the heat dissipation part fixing seat 110, and the heat dissipation part 109 and the nozzle assembly thereon are disassembled. The disassembly and assembly are convenient and fast, saving time and effort, and also have high reliability.

[0078] In a feasible real-time manner, the second disassembly and assembly group further includes a positioning connection member 1103, the positioning connection member 1103 is located in the fixing base body 1108, the positioning connection member 1103 is arranged toward the heat dissipation portion 109, the positioning connection member 1103 can be extended and retracted in the fixing base body 1108, and the positioning connection member 1103 protrudes from the fixing base body 1108 when extended;

[0079] The first disassembly and assembly group also includes a positioning hole 1093 , and the positioning hole 1093 is used for matching and connecting with the positioning connector 1103 .

[0080] Among them, through the matching connection between the positioning connector 1103 and the positioning hole 1093, the circumferential rotation of the heat dissipation part 109 can be limited, thereby realizing the fixed connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110. The setting of the positioning connector 1103 and the positioning hole 1093 can avoid the vibration during the operation of the hot end assembly 100 during rapid disassembly and assembly, causing the heat dissipation part 109 to rotate, and further ensure the reliability of the connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110. Since the positioning connector 1103 can be telescoped in the fixing seat base 1108, the heat dissipation ring 109 and the heat dissipation ring fixing seat 110 can be quickly disassembled and assembled, further improving the replacement efficiency of the nozzle assembly, saving the user's disassembly and assembly time, improving the user's printing model efficiency, and enhancing the user experience.

[0081] Specifically, during installation, after the limiting boss 1091 enters the second locking channel 1102 from the first locking channel 1101, the heat dissipation portion 109 is rotated until the positioning connector 1103 pops out from the fixing seat base 1108 into the positioning hole 1093, making a "click" sound, and the rotation of the heat dissipation ring 109 is stopped, thereby realizing the connection between the heat dissipation ring 109 and the heat dissipation ring fixing seat 110. At this time, the second locking channel 1102 and the positioning hole 1093 limit the axial and rotational movement of the heat dissipation ring 109, thereby realizing the fixed connection between the limiting ring and the limiting ring fixing seat. During disassembly, the heat dissipation ring 109 is rotated in the opposite direction according to the installation direction. Since the positioning connector 1103 can be extended and retracted in the fixed seat base 1108, under the action of the rotational force, the heat dissipation part 109 pushes the positioning connector 1103 back into the fixed seat base 1108, and the limiting boss 1091 rotates from the second card-in channel 1102 to the first card-in channel 1101 until the heat dissipation part 109 can no longer rotate, and the heat dissipation part 109 is taken out of the first card-in channel 1101, thereby realizing the disassembly of the heat dissipation part 109 and the heat dissipation part fixed seat 110.

[0082] It is understandable that the vibration force during the rapid disassembly and assembly of the hot end assembly 100 is not sufficient to cause the positioning connector 1103 to disengage from the positioning hole 1093, and an external rotational force is required to rotate the heat dissipation part 109 to push the positioning connector 1103 into the fixed seat base 1108 through the heat dissipation part 109 to achieve the retraction of the positioning connector 1103.

[0083] In a possible implementation, Figure 7 and Figure 8 As shown, the positioning connector 1103 includes a receiving frame and a sphere, part of the sphere is located outside the receiving frame, the receiving frame and the sphere are connected by an elastic member, the receiving frame is arranged in a fixing seat base 1108, and the sphere located outside the receiving frame protrudes from the fixing seat base 1108.

[0084] Among them, a mounting blind hole is provided in the fixing seat base 1108, and the mounting blind hole extends toward the heat dissipation part 109, and the positioning connecting piece 1103 is arranged in the mounting blind hole. When the heat dissipation part fixing seat 110 has not been connected to the heat dissipation part 109, the sphere protrudes from the fixing seat base 1108, and when the limiting boss 1091 of the heat dissipation part 109 slides into the first card-in channel 1101, under the pressure of the outer wall of the heat dissipation part 109, the sphere retracts into the fixing seat base 1108, and when the limiting boss 1091 of the heat dissipation part 109 enters the second card-in channel 1102 and starts to rotate, after the sphere meets the positioning hole 1093, it pops up from the fixing seat base 1108 under the action of the elastic member, and is carded with the positioning hole 1093. The pop-up of the sphere collides with the positioning hole 1093, and a "click" sound is emitted, reminding the user that the card-in is completed and the rotation of the heat dissipation part 109 is stopped.

[0085] Optionally, in order to improve the reliability of the connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110, a plurality of positioning connectors 1103 can be provided. Two positioning connectors 1103 can be provided, and the angle between the two positioning connectors 1103 is 180°. Three positioning connectors 1103 can also be provided, and the angle between two adjacent positioning connectors 1103 is 120°. When four positioning connectors 1103 are provided, the angle between two adjacent positioning connectors 1103 is 90°. In other words, the positioning connectors 1103 are evenly provided on the circumference of the fixing seat base. Such a provision can improve the reliability of the connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110 on the one hand, and can also make the force on the heat dissipation part 109 more uniform, thereby ensuring the parallelism between the nozzle 102 and the printing platform. Among them, the number of positioning holes 1093 is consistent with the number of positioning connectors 1103.

[0086] It should be noted that the positioning connector 1103 can be made by yourself or the positioning glass beads can be purchased directly, which will not be described in detail here.

[0087] In a possible implementation, Fig. 9 As shown, the first disassembly and assembly group is provided with a sliding ring track 1094, the positioning hole 1093 is located on the sliding ring track 1094, the sliding ring track 1094 is located between the heat dissipation body 1096 and the limiting boss 1091, and the ball is used to move on the sliding ring track 1094 and then get stuck in the positioning hole 1093.

[0088] Among them, the number of positioning holes 1093 is consistent with the number of positioning connectors 1103, the position of the positioning hole 1093 corresponds to the position of the positioning connector 1103, the limiting boss 1091 is located at the end away from the heat dissipation body 1096, the sliding ring track 1094 is located between the limiting boss 1091 and the heat dissipation body 1096, and when the limiting boss 1091 is located at the connection between the first card-in channel 1101 and the second card-in channel 1102, the positioning connector 1103 is just located in the sliding ring track 1094, and then the heat dissipation part 109 is rotated until the positioning connector 1103 is inserted into the positioning hole 1093 on the sliding ring track 1094.

[0089] It should be noted that, through the setting of sliding into the circular track 1094, the ball of the positioning connector 1103 can slide in the circular track 1094, ensuring the stability and balance of the rotation. When there are multiple positioning connectors 1103, it can be ensured that each positioning connector 1103 can accurately enter the positioning hole 1093, and the eccentricity caused by manual rotation will not make the positioning connector 1103 unable to be inserted into the positioning hole 1093; the depth of the sliding circular track 1094 is less than the depth of the positioning hole 1093. Such a setting can make the ball of the positioning connector 1103 bounce into the sliding circular track 1094 first, and then when encountering the positioning hole 1093, it can be accurately inserted into the positioning hole 1093, thereby ensuring the reliability of the connection of the positioning connector 1103.

[0090] Optionally, the positioning connector 1103 is located in the middle section of the fixing seat base 1108 , and after the heat dissipation part 109 and the heat dissipation part fixing seat 110 are installed, it can be ensured that the positioning connector 1103 corresponds to the position of sliding into the circular track 1094 .

[0091] In a possible implementation, Figure 7 and Figure 8 As shown, the heat dissipation portion fixing seat 110 further includes a connection block 1104 , which is connected to a fixing seat base 1108 . The connection block 1104 is provided with a bolt hole 1105 , which extends in a direction away from the heat dissipation portion 109 .

[0092] Among them, the heat dissipation part fixing seat 110 is installed on the print head slider assembly 500 through the setting of the connecting block 1104. Usually, there are two bolt holes 1105 on the connecting block 1104, which can improve the stability of the fixing of the heat dissipation part 109. There can also be three bolt holes 1105. The three bolt holes 1105 can be arranged in a triangle, which will not be repeated here.

[0093] It should be noted that the heat dissipation part fixing seat 110 is a fixed part, and the heat dissipation part 109 is a moving part. In this embodiment, rotating the heat dissipation part 109 clockwise can realize the disassembly of the heat dissipation part 109, and rotating the heat dissipation part 109 counterclockwise can realize the assembly of the heat dissipation part 109 and the heat dissipation part fixing seat 110. The installation indication direction can be engraved on the side of the fixing ring away from the print head slider assembly 500. The installation indication direction can be an arrow with only the installation direction, an arrow with only the disassembly direction, or a two-way arrow to indicate the installation and disassembly respectively, so as to determine the disassembly direction and improve the user's disassembly convenience.

[0094] In a possible implementation, Figure 7 and Figure 8As shown, the heat dissipation portion fixing seat 110 further includes a cover plate 1106 . The cover plate 1106 is located at one end close to the second insertion channel 1102 . A through hole 1107 is provided on the cover plate 1106 .

[0095] Among them, the setting of the cover plate 1106 can isolate the heat dissipation part 109 from the extruder assembly 200 thereon, thereby preventing dust from entering the throat 108 and the nozzle 102 through the heat dissipation part 109 and affecting the normal operation of the nozzle 102. The through hole 1107 on the cover plate 1106 has a guiding function, which can enable the consumables in the extruder assembly 200 to accurately enter the throat 108 and the nozzle 102.

[0096] In a possible implementation, Fig. 9 As shown, the heat dissipation portion 109 further includes a rotating handle 1092, and the rotating handle 1092 is disposed between the heat dissipation body 1096 and the first disassembly assembly group.

[0097] Among them, through the setting of the rotating handle 1092, there is a position for applying force when the heat dissipation part 109 is disassembled and assembled, thereby improving the convenience of the user in rotating the heat dissipation part 109. It should be noted that the rotating handle 1092 can be a rod-shaped handle or a ring-shaped handle, which protrudes from the heat dissipation body 1096 for easy rotation and force application. The specific shape is not limited, but a pair of handles are usually provided, and the angle between the pair of handles is 180°. When one of the handles is located on one side of the print head slider assembly 500, the opposite handle can also realize rotation and force application to ensure smooth rotation during disassembly and assembly.

[0098] In a possible implementation, Fig. 9 As shown, the heat dissipation portion 109 further includes a guiding slope 1095 , which is located at one end of the connection portion away from the heat dissipation body 1096 , and the limiting boss 1091 is located on the guiding slope 1095 , which extends toward the direction of the fixing seat base 1108 .

[0099] Among them, the setting of the guiding inclined surface 1095 can facilitate the setting of the limiting boss 1091, increase the length of the limiting boss 1091, and improve the reliability of the connection between the limiting boss 1091 and the first card-in channel 1101 and the second card-in channel 1102.

[0100] It should be noted that a plurality of limit bosses 1091 may be provided, and the limit bosses 1091 are evenly arranged on the guide slope 1095. Similarly, the number of the first snap-in channels 1101 and the second snap-in channels 1102 matches the number of the limit bosses 1091. The provision of a plurality of limit bosses 1091 can ensure the stability and balance of the connection of the heat dissipation part 109, and can also make the force on the heat dissipation part 109 more uniform, thereby ensuring the parallelism of the nozzle 102 and the printing platform.

[0101] Specifically, Fig.13a and Fig.13b As shown, when the hot end assembly of this embodiment is disassembled, the heat dissipation part fixing seat 110 and the heat dissipation part 109 move together. The heat dissipation part fixing seat 110 is a fixed part, and the heat dissipation part 109 is a moving part. Before installation, as shown in FIG. Fig.13a As shown, the limiting boss 1091 on the heat dissipation part 109 is aligned with the first snap-in channel 1101 on the heat dissipation part fixing seat 110. After the limiting boss 1091 slides into the first snap-in channel 1101 by means of the guide slope 1095, the rotating handle 1092 is operated in the installation direction (counterclockwise), and the limiting boss 1091 enters the second snap-in channel 1102. The positioning connector 1103 snaps the ball into the circular track 1094 according to the elastic force of the elastic member. The rotating handle 1092 is continued to be operated until a "click" sound is heard. The ball of the positioning connector 1103 is snapped into the positioning hole 1093 to achieve positioning. The ball supports the positioning hole 1093 under the action of the internal elastic member. At this time, the limiting boss 1091 is located in the second snap-in channel 1102, and at the retaining edge in the second snap-in channel 1102, the heat dissipation part 109 cannot continue to rotate and move axially, and is installed in place, as shown in FIG. Fig.13b As shown, at this time, the second card-in channel 1102 and the positioning hole 1093 limit the axial and circumferential movement of the heat dissipation part 109, and the reverse operation can be performed during disassembly. This disassembly and assembly process can complete rapid assembly positioning and movement restriction without tools. The disassembly and assembly is convenient and fast, saving time and effort, and has high reliability.

[0102] Figure 2 for Figure 1 An exploded schematic diagram of the illustrated embodiment; Figure 3 for Figure 1 a top view of the illustrated embodiment; Figure 4 for Figure 3 AA schematic diagram of the embodiment shown without the insulation cover; Figure 5 for Figure 1 a front view of the illustrated embodiment; Figure 6 for Figure 5 BB schematic diagram of the embodiment shown.

[0103] In a possible implementation, Figures 2 to 6 As shown, the nozzle assembly includes:

[0104] A throat 108, one end of which is disposed in the heat dissipation portion 109;

[0105] The heating block 103 is disposed at one end of the heat dissipation part 109 away from the heat dissipation part fixing seat 110, and the other end of the throat 108 is connected to the heating block 103;

[0106] The nozzle 102 is disposed in the heating block 103 . The nozzle 102 is located at one end of the heating block 103 away from the heat dissipation portion 109 . The nozzle 102 and the throat 108 are coaxially disposed.

[0107] Among them, the throat 108 and the nozzle 102 are both provided with external threads, and the heating block 103 is provided with internal threads, so as to realize the detachable connection between the throat 108 and the nozzle 102 on the heating block 103. The throat 108 and the nozzle 102 inside the heating block 103 are tightly sealed against the top to prevent the consumables from overflowing from the gap, thereby ensuring the stability and reliability of the nozzle 102.

[0108] It should be noted that the throat 108 is made of a high-temperature resistant and heat-combining material to ensure that the consumables above the nozzle 102 are not melted, and the nozzle 102 is made of a material with strong thermal conductivity, such as copper or iron, which can quickly conduct the heat of the heating block 103 and quickly melt the consumables in the nozzle 102, making the nozzle filament output smoother.

[0109] Optionally, after the nozzle 102, the heating block 103 and the throat 108 are connected to form a nozzle assembly, the throat 108 is pressed into the inner hole of the heat dissipation part 109 through interference fit to form an integrated assembly.

[0110] In a possible implementation, Figure 2 As shown, the nozzle assembly also includes:

[0111] The heating tube 107 is disposed in the heating block 103 and is used to provide a heat source for the heating block 103 .

[0112] Among them, a heating tube 107 is arranged in the heating block 103, and the heating tube 107 is fixed in the heating block 103 by a top screw 104 to provide a heating source for the heating block 103. Multiple heating blocks 103 can be arranged to improve the heating efficiency and ensure the smoothness of the filament output from the nozzle 102. However, if too many heating tubes 107 are arranged, the overall size of the nozzle assembly will increase. Therefore, a corresponding number of heating tubes 107 can be arranged as needed, and there is no limit on the number of heating tubes 107.

[0113] In a possible implementation, Figure 2 As shown, the nozzle assembly also includes:

[0114] The temperature sensor 105 is disposed in the heating block 103 . The temperature sensor 105 is located at one end of the heating block 103 close to the nozzle 102 .

[0115] Among them, a temperature sensor 105 is arranged in the heating block 103, and the temperature monitored by the temperature sensor 105 is transmitted to the main control board, so as to timely adjust the temperature of the heating block 103. The temperature sensor 105 is arranged at one end close to the nozzle 102, which can improve the accuracy and reliability of temperature monitoring and ensure that the temperature of the heating block 103 can quickly melt the consumables without causing waste of heat energy.

[0116] It should be noted that the temperature sensor 105 is fixed to the heating block 103 by a flat head screw 106. The flat bottom of the flat head screw 106 provides a larger contact area, so that the temperature sensor 105 can be better fixed in the heating block 103 and is not easy to loosen, thereby ensuring the reliability of fastening.

[0117] In a possible implementation, Figure 2 As shown, the nozzle assembly further includes a Teflon tube 111 inserted into the throat 108 and the nozzle 102 , and one end of the Teflon tube 111 away from the nozzle 102 extends out of the heat dissipation portion fixing seat 110 .

[0118] Among them, the Teflon tube 111 is inserted into the throat 108 and the nozzle 102 in turn, and extends into the end face of the nozzle 102 to prevent leakage and insulation to prevent jamming. At the same time, the Teflon tube 111 passes through the through hole 1107 on the cover plate 1106 of the heat dissipation part fixing seat 110, passes through the heat dissipation part fixing seat 110, and is connected with the extrusion channel of the extruder assembly 200, so as to facilitate the consumables to enter the throat 108 and the nozzle 102, thereby realizing the stable operation of the nozzle 102.

[0119] It should be noted that the Teflon tube 111 is a material that is resistant to high temperatures and has strong heat resistance. It can work for a long time in a high temperature environment. On the one hand, it can prevent the consumables in the Teflon tube 111 from melting, so that the consumables will not be melted and extruded until the nozzle 102 is located, thereby ensuring the accuracy of extrusion. On the other hand, the Teflon tube 111 has a small friction coefficient, and the consumables therein have good fluidity, which can reduce the film material between the consumables and the Teflon tube 111, and reduce the blockage caused by the difficulty in moving the consumables in the nozzle assembly.

[0120] In a feasible implementation manner, the heating block 103 is externally coated with a heat-insulating sleeve 101 to ensure heating efficiency and reduce heat loss.

[0121] The 3D printer quick disassembly and assembly hot end assembly 100 of the present embodiment has a compact structure, high space utilization, and is more convenient for maintenance and disassembly. Users can disassemble and install it by themselves, thereby improving the efficiency of users in printing models and enhancing user experience.

[0122] Fig.10 is a schematic diagram of a print head assembly according to an embodiment of the utility model; Fig.11 for Fig.10a front view of the illustrated embodiment; Fig.12 for Fig.10 Schematic exploded view of the illustrated embodiment.

[0123] like Figures 10 to 12 As shown, another embodiment of the present embodiment provides a print head assembly, including:

[0124] The 3D printer quick disassembly and assembly hot end assembly 100 as described above;

[0125] The extruder assembly 200 is located at the end of the 3D printer quick disassembly hot end assembly 100 away from the nozzle 102;

[0126] The print head slider assembly 500 , the 3D printer quick disassembly and assembly hot end assembly 100 and the extruder assembly 200 are fixed on the print head slider assembly 500 .

[0127] The extruder assembly 200 and the 3D printer quick disassembly hot end assembly 100 are both fixed on the print head slider assembly 500, so as to be installed on the printer body as a whole. The Teflon tube 111 of the quick disassembly hot end assembly 100 is connected with the extrusion channel of the extruder assembly, so that the consumables can enter the nozzle 102 through the Teflon tube 111, so as to realize the filament output function of the nozzle 102. The quick disassembly hot end assembly 100 is fixedly connected with the print head slider assembly 500 through the connection block 1104 on the heat dissipation part fixing seat 110.

[0128] It should be noted that, since the print head assembly of this embodiment includes the above-mentioned 3D printer quick disassembly hot end assembly 100, the print head assembly of this embodiment has all the advantages of the above-mentioned 3D printer quick disassembly hot end assembly 100, which will not be repeated.

[0129] In a possible implementation, Figures 10 to 12 As shown, it also includes:

[0130] The circuit board 300 is located at one side of the extruder assembly 200. A wire card 400 is clamped on the circuit board 300. The wire card 400 is located at one end of the circuit board 300 away from the 3D printer quick disassembly and assembly hot end assembly 100. The circuit board 300 is fixedly connected to the print head slider assembly 500.

[0131] Among them, the control signals of the electrical circuits of the extruder assembly 200 and the nozzle assembly are transmitted to the main control board through the circuit board 300 to realize the normal operation of the extruder assembly 200 and the nozzle assembly. The wired card 400 is connected to the circuit board 300, which can centrally store the electrical circuits, avoid the influence of random placement of the circuits on the normal operation of the print head assembly, and improve the user experience.

[0132] In a possible implementation, Figures 10 to 12 As shown, it also includes:

[0133] The proximity sensor 700 is disposed opposite to the circuit board 300 , and the proximity sensor 700 is fixedly connected to the print head slider assembly 500 .

[0134] Among them, a mounting base is provided on the proximity sensor 700, and the proximity sensor 700 is fixed on the print head slider assembly 500 through the mounting base. The proximity sensor 700 is a distance sensor, which is mainly used to measure the distance between the nozzle 102 and the printing plane. The distance signal is received by the main control board for timely leveling, that is, the distance between the moving nozzle 102 and the printing plane is ensured to ensure the flatness of the subsequent 3D printed model.

[0135] In a possible implementation, Figures 10 to 12 As shown, it also includes:

[0136] The cooling fan 600 is disposed between the 3D printer quick disassembly and assembly hot end assembly 100 and the print head slider assembly 500, and the cooling fan 600 is fixedly connected to the print head slider assembly 500.

[0137] Among them, since the heat dissipation fixing seat is connected to the print head slider assembly 500 through the connecting block 1104, there is a certain distance between the print head slider assembly 500 and the heat dissipation body 1096, that is, the thickness of the connecting block 1104. A cooling fan 600 is arranged in this space. On the one hand, it provides a cooling source for the heat dissipation part 109, strongly cools the heat conducted from the heating block 103, and improves the heat dissipation efficiency. On the other hand, it can make the structure of the print head assembly more compact, with high space utilization, and improve the applicable scenarios of the print head assembly.

[0138] It should be noted that, since the print head assembly of this embodiment includes the above-mentioned 3D printer quick disassembly hot end assembly 100, all the advantages of the above-mentioned quick disassembly hot end assembly 100 are included and will not be repeated.

[0139] Another embodiment of the present embodiment provides a 3D printer, comprising:

[0140] The printer body; and

[0141] As the print head assembly mentioned above, the print head assembly is disposed in a slideway of the printer body.

[0142] Among them, the 3D printer includes the above-mentioned print head assembly, and therefore has all the advantages of the above-mentioned print head assembly, which will not be repeated. The print head assembly is arranged in the slideway of the printer body and can move in the slideway. The moving direction of the print head assembly is as follows Fig.11 Shown in the X direction.

[0143] It is understandable that, since the 3D printer of this embodiment includes the above-mentioned print head assembly, it has all the advantages of the above-mentioned print head assembly, which will not be described in detail.

[0144] The present application also provides the following embodiments:

[0145] Embodiment 1: A 3D printer quick disassembly hot end assembly 100, comprising a heat dissipation part 109 and a heat dissipation part fixing seat 110 externally arranged on the heat dissipation part 109;

[0146] The first disassembly and assembly group is arranged on the heat dissipation part 109;

[0147] The second disassembly and assembly group is arranged on the heat dissipation part fixing seat 110 . The first disassembly and assembly group and the second disassembly and assembly group are used for rotational cooperation. The heat dissipation part 109 and the heat dissipation part fixing seat 110 can be disassembled and assembled by the first disassembly and assembly group and the second disassembly and assembly group.

[0148] Embodiment 2: According to the 3D printer quick disassembly hot end assembly 100 of embodiment 1, the heat dissipation part fixing seat 110 includes a fixing seat base 1108, and the second disassembly assembly group includes a clamping groove, which is arranged on a side of the fixing seat base 1108 facing the heat dissipation part 109;

[0149] The heat dissipation part 109 includes a heat dissipation body 1096 and a first disassembly and assembly group that are interconnected. The heat dissipation part fixing seat 110 is externally arranged on the first disassembly and assembly group. The first disassembly and assembly group includes a limiting boss 1091, which is clamped with the clamping groove. The end of the heat dissipation body 1096 away from the first disassembly and assembly group is connected to the nozzle assembly.

[0150] Embodiment 3, according to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 2, the card slot includes a first card slot 1101 and a second card slot 1102, the first card slot 1101 and the second card slot 1102 are connected, the second card slot 1102 is arranged away from the heat dissipation body 1096, and the limiting boss 1091 slides from the first card slot 1101 into the second card slot 1102 to realize the connection between the heat dissipation part 109 and the heat dissipation part fixing seat 110.

[0151] Embodiment 4: According to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 3, the heat dissipation part fixing seat 110 further includes a cover plate 1106 , which is located at one end close to the second insertion channel 1102 , and a through hole 1107 is provided on the cover plate 1106 .

[0152] Embodiment 5: According to the 3D printer quick disassembly hot end assembly 100 of embodiment 2, the second disassembly group further includes a positioning connector 1103, the positioning connector 1103 is located in the fixed seat base 1108, the positioning connector 1103 is arranged toward the heat dissipation portion 109, the positioning connector 1103 can be extended and retracted in the fixed seat base 1108, and the positioning connector 1103 protrudes from the fixed seat base 1108 when extended;

[0153] The first disassembly and assembly group also includes a positioning hole 1093 , and the positioning hole 1093 is used for matching and connecting with the positioning connector 1103 .

[0154] Example 6: According to the 3D printer quick disassembly and assembly hot end assembly 100 of Example 5, the positioning connector 1103 includes a receiving frame and a sphere, part of the sphere is located outside the receiving frame, the receiving frame and the sphere are connected by an elastic member, the receiving frame is arranged in a fixed seat base 1108, and the sphere located outside the receiving frame protrudes from the fixed seat base 1108.

[0155] Embodiment 7, according to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 6, a first disassembly and assembly assembly part is provided with a sliding ring track 1094, a positioning hole 1093 is located on the sliding ring track 1094, the sliding ring track 1094 is located between the heat dissipation body 1096 and the limiting boss 1091, and the ball is used to move on the sliding ring track 1094 and then get stuck in the positioning hole 1093.

[0156] Example 8. According to the 3D printer quick disassembly and assembly hot end assembly 100 of Example 2, the heat dissipation part 109 also includes a guide slope 1095, the guide slope 1095 is located at one end of the first disassembly and assembly group away from the heat dissipation body 1096, the limiting boss 1091 is located on the guide slope 1095, and the limiting boss 1091 extends toward the direction of the fixed seat base 1108.

[0157] Embodiment 9, according to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 1, the heat dissipation part fixing seat 110 also includes a connecting block 1104, and the connecting block 1104 is connected to the fixing seat base 1108, and a bolt hole 1105 is provided on the connecting block 1104, and the bolt hole 1105 extends toward the heat dissipation part 109 in the fixing seat base 1108.

[0158] Embodiment 10: According to the 3D printer quick disassembly hot end assembly 100 of embodiment 1, the heat dissipation part 109 further includes a rotating handle 1092, and the rotating handle 1092 is arranged between the heat dissipation body 1096 and the first disassembly group.

[0159] Embodiment 11: The 3D printer quick disassembly and assembly hot end assembly 100 according to embodiment 2, the nozzle assembly comprises:

[0160] A throat 108, one end of which is disposed in the heat dissipation portion 109;

[0161] The heating block 103 is disposed at one end of the heat dissipation part 109 away from the heat dissipation part fixing seat 110, and the other end of the throat 108 is connected to the heating block 103;

[0162] The nozzle 102 is disposed in the heating block 103 . The nozzle 102 is located at one end of the heating block 103 away from the heat dissipation portion 109 . The nozzle 102 and the throat 108 are coaxially disposed.

[0163] Embodiment 12: According to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 11, the nozzle assembly further includes:

[0164] The heating tube 107 is disposed in the heating block 103 and is used to provide a heat source for the heating block 103 .

[0165] Embodiment 13: According to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 11, the nozzle assembly further includes:

[0166] The temperature sensor 105 is fixedly connected to the heating block 103 , and the temperature sensor 105 is located at one end of the heating block 103 close to the nozzle 102 .

[0167] Embodiment 14: According to the 3D printer quick disassembly and assembly hot end assembly 100 of embodiment 11, the nozzle assembly further comprises a Teflon tube 111 inserted into the throat 108 and the nozzle 102, and one end of the Teflon tube 111 away from the nozzle 102 extends out of the heat dissipation fixing seat 110.

[0168] Embodiment 15: A print head assembly, comprising:

[0169] A 3D printer quick disassembly and assembly hot end assembly 100 as in any one of Embodiments 1 to 14;

[0170] The extruder assembly 200 is located at the end of the 3D printer quick disassembly hot end assembly 100 away from the nozzle 102;

[0171] The print head slider assembly 500 , the 3D printer quick disassembly and assembly hot end assembly 100 and the extruder assembly 200 are fixed on the print head slider assembly 500 .

[0172] Embodiment 16: The print head assembly according to embodiment 15, further comprising:

[0173] The circuit board 300 is located at one side of the extruder assembly 200. A wire card 400 is clamped on the circuit board 300. The wire card 400 is located at one end of the circuit board 300 away from the 3D printer quick disassembly and assembly hot end assembly 100. The circuit board 300 is fixedly connected to the print head slider assembly 500.

[0174] Embodiment 17: The print head assembly according to embodiment 16, further comprising:

[0175] The proximity sensor 700 is disposed opposite to the circuit board 300 , and the proximity sensor 700 is fixedly connected to the print head slider assembly 500 .

[0176] Embodiment 18: The print head assembly according to embodiment 15, further comprising:

[0177] The cooling fan 600 is disposed between the 3D printer quick disassembly and assembly hot end assembly 100 and the print head slider assembly 500, and the cooling fan 600 is fixedly connected to the print head slider assembly 500.

[0178] Embodiment 19: A 3D printer, comprising:

[0179] The printer body; and

[0180] In the print head assembly of any one of Embodiments 15 to 18, the print head assembly is disposed in a slideway of the printer body.

[0181] In the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0182] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. The present invention is intended to cover any variation, use, or adaptation of the present invention that follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only.

[0183] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D printer quick disassembly and assembly hot end assembly, characterized in that: It includes a heat dissipation part and a heat dissipation part fixing seat externally arranged on the heat dissipation part; A first disassembly and assembly group is arranged on the heat dissipation part; The second disassembly and assembly group is arranged on the heat dissipation part fixing seat. The first disassembly and assembly group and the second disassembly and assembly group are used for rotational cooperation. The heat dissipation part and the heat dissipation part fixing seat can be disassembled and assembled through the first disassembly and assembly group and the second disassembly and assembly group.

2. The 3D printer quick disassembly and assembly hot end assembly according to claim 1, characterized in that: The heat dissipation part fixing seat comprises a fixing seat base, and the second disassembly assembly group comprises a clamping groove, and the clamping groove is arranged on a side of the fixing seat base facing the heat dissipation part; The heat dissipation part includes a heat dissipation body and a first disassembly and assembly group that are interconnected. The heat dissipation part fixing seat is externally arranged on the first disassembly and assembly group. The first disassembly and assembly group includes a limiting boss that is clamped with the clamping groove. One end of the heat dissipation body away from the first disassembly and assembly group is connected to the nozzle assembly.

3. The 3D printer quick disassembly and assembly hot end assembly according to claim 2, characterized in that: The snap-in slot includes a first snap-in channel and a second snap-in channel, the first snap-in channel and the second snap-in channel are connected, the second snap-in channel is arranged away from the heat dissipation body, and the limiting boss slides from the first snap-in channel into the second snap-in channel to realize the connection between the heat dissipation part and the heat dissipation part fixing seat.

4. The 3D printer quick disassembly and assembly hot end assembly according to claim 3, characterized in that: The heat dissipation part fixing seat further comprises a cover plate, wherein the cover plate is located at one end close to the second insertion channel, and a through hole is provided on the cover plate.

5. The 3D printer quick disassembly and assembly hot end assembly according to claim 2, characterized in that: The second disassembly and assembly group further includes a positioning connection member, the positioning connection member is located in the base of the fixing seat, the positioning connection member is arranged toward the heat dissipation portion, the positioning connection member can be extended and retracted in the base of the fixing seat, and the positioning connection member protrudes from the base of the fixing seat when extended; The first assembly and disassembly group further comprises a positioning hole, and the positioning hole is used for matching and connecting with the positioning connector.

6. The 3D printer quick disassembly and assembly hot end assembly according to claim 5, characterized in that: The positioning connector includes a receiving frame and a sphere, part of the sphere is located outside the receiving frame, the receiving frame and the sphere are connected via an elastic member, the receiving frame is disposed within the base of the fixing seat, and the sphere located outside the receiving frame protrudes from the base of the fixing seat.

7. The 3D printer quick disassembly and assembly hot end assembly according to claim 6, characterized in that: The first disassembly and assembly group is provided with a sliding ring track, the positioning hole is located on the sliding ring track, the sliding ring track is located between the heat dissipation body and the limiting boss, and the ball is used to move on the sliding ring track and then be stuck in the positioning hole.

8. The 3D printer quick disassembly and assembly hot end assembly according to claim 2, characterized in that: The heat dissipation part further comprises a guiding inclined surface, the guiding inclined surface is located at an end of the first disassembly and assembly group away from the heat dissipation body, the limiting boss is located on the guiding inclined surface, and the limiting boss extends toward the direction of the fixing seat base.

9. The 3D printer quick disassembly and assembly hot end assembly according to claim 2, characterized in that: The heat dissipation part fixing seat further comprises a connection block, wherein the connection block is connected to the fixing seat base, and a bolt hole is arranged on the connection block, and the bolt hole extends in a direction away from the heat dissipation part.

10. The 3D printer quick disassembly and assembly hot end assembly according to claim 2, characterized in that: The heat dissipation part further includes a rotating handle, and the rotating handle is arranged between the heat dissipation body and the first disassembly and assembly group.

11. The 3D printer quick disassembly hot end assembly according to claim 2, characterized in that: The nozzle assembly comprises: A throat, one end of which is disposed in the heat dissipation portion; A heating block is arranged at one end of the heat dissipation part away from the heat dissipation part fixing seat, and the other end of the throat is connected to the heating block; A nozzle is arranged in the heating block, the nozzle is located at an end of the heating block away from the heat dissipation part, and the nozzle and the throat are coaxially arranged.

12. The 3D printer quick disassembly hot end assembly according to claim 11, characterized in that: The nozzle assembly further comprises: A heating tube is arranged in the heating block, and is used to provide a heat source for the heating block.

13. The 3D printer quick disassembly hot end assembly according to claim 11, characterized in that: The nozzle assembly further comprises: The temperature sensor is arranged in the heating block, and the temperature sensor is located at one end of the heating block close to the nozzle.

14. The 3D printer quick disassembly hot end assembly according to claim 11, characterized in that: The nozzle assembly further comprises a Teflon tube inserted into the throat and the nozzle, and one end of the Teflon tube away from the nozzle extends out of the heat dissipation part fixing seat.

15. A print head assembly, characterized in that: include: The 3D printer quick disassembly hot end assembly according to any one of claims 1 to 14; An extruder assembly is located at an end of the 3D printer quick disassembly hot end assembly away from the nozzle; A print head slider assembly, the 3D printer quick disassembly hot end assembly and the extruder assembly are fixed on the print head slider assembly.

16. The print head assembly according to claim 15, wherein: Also includes: A circuit board is located at one side of the extruder assembly. A wire card is clamped on the circuit board. The wire card is located at an end of the circuit board away from the 3D printer's quick-disassembly hot end assembly. The circuit board is fixedly connected to the print head slider assembly.

17. The print head assembly according to claim 16, wherein: Also includes: A proximity sensor is arranged opposite to the circuit board, and the proximity sensor is fixedly connected to the print head slider assembly.

18. The print head assembly according to claim 15, wherein: Also includes: A cooling fan is arranged between the 3D printer quick disassembly and assembly hot end assembly and the print head slider assembly, and the cooling fan is fixedly connected to the print head slider assembly.

19. A 3D printer, characterized in that: include: Printer body; as well as The print head assembly as claimed in any one of claims 15 to 18, wherein the print head assembly is arranged in a slideway of the printer body.

Images