Spray head assembly capable of achieving quick butt joint

Abstract

The utility model discloses a spray head assembly capable of achieving rapid butt joint, and relates to the technical field of 3D printing equipment. The spray head assembly comprises a spray head body, a spray head base and a second locking mechanism, the second locking mechanism comprises a locking connector, a locking ring, a locking structure and a driving piece, the locking connector is arranged on the spray head body and provided with a locking boss, the driving piece and the locking ring are arranged on the spray head base, the locking structure is arranged in the locking ring, and the locking boss is provided with a locking groove. The driving part can drive the locking ring to rotate so that the locking ring can have a locking position and an unlocking position, when the locking ring is located at the unlocking position, the locking boss can penetrate through the locking ring, and when the locking ring is located at the locking position, the locking structure can be clamped between the locking boss and the spray head body and abut against the locking boss so that the spray head body and the spray head base can be locked. The spray head assembly can greatly reduce abrasion in the disassembly and assembly process, the use precision cannot be affected, and therefore the quality of printed products is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing equipment technical field especially relates to a quick docking's spray head subassembly. BACKGROUND

[0002] The working process of 3D printer is through high temperature heating printing nozzle and makes printing consumables melt, and printing nozzle along the printing path that sets up will print consumables layer by layer deposit to printing platform, thereby constructs the model with three -dimensional structure. Printing nozzle usually is fixed on X axis / Y axis slider, in order to carry out X or Y direction movement.

[0003] In order to simplify the structure, can set up the electrical element such as drive mechanism to spray head seat, set up extrusion mechanism to spray head main body, when needing the spray head of certain color / material, only need to move spray head seat to the front of corresponding spray head main body and carry out docking and clamping fixation. However, the frequent plugging and unplugging between spray head main body and spray head seat can cause the clamping structure to wear, affect the use precision, cause the product quality of printing to reduce. SUMMARY

[0004] The utility model discloses a kind of spray head subassembly of quick docking, can greatly reduce the wear and tear in dismounting process, so as not to affect use precision, to ensure the quality of product of printing.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of spray head subassembly of quick docking, comprising:

[0007] Spray head main body and spray head seat;

[0008] Second locking mechanism, including locking connector, locking ring, locking structure and driving piece, the locking connector is set to the spray head main body, the locking connector has locking boss, the driving piece and the locking ring are set to the spray head seat, the locking structure is set to the locking ring, the driving piece can drive the locking ring rotation to make the locking ring have locking position and unlocking position, when the locking ring is in the unlocking position, the locking boss can pass through the locking ring, when the locking ring is in the locking position, the locking structure can be inserted between the locking boss and the spray head main body and abuts the locking boss, to lock the spray head main body with the spray head seat.

[0009] As an alternative to the above-mentioned quick-docking spray head assembly, the locking structure comprises a locking plate arranged on the inner wall of the locking ring, and when the locking ring is in the unlocked position, the locking plate is offset from the locking boss, and when the locking ring is in the locked position, the locking plate overlaps the locking boss.

[0010] As an alternative to the above-mentioned quick-docking spray head assembly, the side of the locking plate away from the spray head body is provided with a first locking inclined surface, and along the rotation direction of the locking ring from the unlocked position to the locked position, the first locking inclined surface is inclined towards the spray head body.

[0011] As an alternative to the above-mentioned quick-docking spray head assembly, the locking structure comprises two locking plates that are centrally symmetric with respect to the axis of the locking ring, and the locking joint has two locking bosses corresponding to the two locking plates.

[0012] As an alternative to the above-mentioned quick-docking spray head assembly, the second locking mechanism further comprises an annular locking bracket, the annular locking bracket is provided with a sliding groove along the circumference, and the sliding groove penetrates the inner wall of the annular locking bracket to form a locking hole, the locking structure comprises a locking piece arranged in the sliding groove, the locking ring is arranged around the outer circumference of the annular locking bracket, when the locking ring is in the unlocked position, the locking piece is located in the sliding groove, and when the locking ring is in the locked position, the locking ring makes the locking piece partially protrude out of the locking hole to be clamped between the locking boss and the spray head body.

[0013] As an alternative to the above-mentioned quick-docking spray head assembly, the inner wall of the locking ring is provided with an abutting portion, and when the locking ring is rotated from the unlocked position to the locked position, the size of the abutting portion protruding towards the center of the locking ring gradually increases at the position of the locking piece.

[0014] As an alternative to the above-mentioned quick-docking spray head assembly, the annular locking bracket is provided with a plurality of sliding grooves spaced along the circumference, and each sliding groove is provided with a locking piece; and / or,

[0015] The locking boss is an annular structure that surrounds the locking joint and connects the head and tail.

[0016] As an alternative to the above-mentioned quick-docking spray head assembly, the locking hole is provided with a limiting ridge, and the limiting ridge can abut against the locking piece to prevent the locking piece from being separated from the sliding groove through the locking hole.

[0017] As an alternative to the aforementioned quick-connect nozzle assembly, the locking ring includes a drive tooth segment, the drive component includes a drive gear, and the drive tooth segment meshes with the drive gear.

[0018] As an optional solution for the aforementioned quick-connect nozzle assembly, the nozzle holder further includes a drive mechanism, a planetary gear set, and a female head. The nozzle body includes a male head and an extrusion mechanism. The male head is drive-connected to the extrusion mechanism, and the female head can be inserted into the male head to achieve a drive-connection between them. The planetary gear set includes:

[0019] An external gear ring, which is fixedly mounted on the nozzle seat;

[0020] An output gear is rotatably disposed within the external gear ring and connected to the output shaft of the drive mechanism;

[0021] A planetary carrier is rotatably disposed within the external gear ring and connected to the female head. Planetary gears are rotatably disposed on the planetary carrier, and the planetary gears mesh with both the output gear and the external gear ring.

[0022] The beneficial effects of this utility model are:

[0023] This invention provides a quick-connect nozzle assembly. In this assembly, the nozzle body and nozzle holder are connected via a second locking mechanism, facilitating rapid assembly and disassembly. When the driving component drives the locking ring to the unlocked position, the nozzle body and nozzle holder are connected, allowing the locking boss of the locking connector to pass through the locking ring. The driving component then drives the locking ring to the locked position. At this point, the locking structure within the locking ring engages with the locking boss and the nozzle body, abutting against the locking boss to lock the nozzle body and nozzle holder. When the nozzle body needs to be replaced, the driving component drives the locking ring from the locked position to the unlocked position, causing the locking boss to disengage from the locking ring, thus separating the nozzle body from the nozzle holder.

[0024] This quick-connect printhead assembly locks the printhead body to the printhead base by rotating a locking ring, which significantly reduces wear during assembly and disassembly, thus ensuring the accuracy of the printed product and guaranteeing its quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the nozzle assembly of this utility model suspended on the X-axis crossbeam after docking;

[0026] Figure 2 for Figure 1 An exploded view of the nozzle assembly at one angle;

[0027] Figure 3 forFigure 1 Another exploded view of the spray head assembly from another angle;

[0028] Figure 4 A structure diagram of the spray head seat of the utility model;

[0029] Figure 5 A structure diagram of the spray head seat without a shell, with the lock catch in the first position; Figure 4 A structure diagram of the spray head seat without a shell, with the lock catch in the first position;

[0030] Figure 6 A rear view of the spray head body of the utility model;

[0031] Figure 7 A structure diagram of the spray head body from another angle; Figure 6 A sectional view along A-A;

[0032] Figure 8 A front view structure diagram of the spray head body of the utility model without a front cover, a second elastic member, a steel ball and a second bearing;

[0033] Figure 9 A three-dimensional structure diagram of the spray head body of the utility model separated from the front cover;

[0034] Figure 10 A structure diagram of the spray head assembly after butt joint (without the spray head seat shell), with the lock catch in the second position;

[0035] Figure 11 A structure diagram of the transmission shaft and the driving wire feeding wheel of the utility model;

[0036] Figure 12 Another structure diagram of the front cover of the utility model from another angle;

[0037] Figure 13 A structure diagram of the spray head body of the second embodiment of the utility model;

[0038] Figure 14 A structure diagram of the second locking mechanism of the second embodiment of the utility model;

[0039] Figure 15 An exploded view of the second locking mechanism of the second embodiment of the utility model;

[0040] Figure 16 A structure diagram of the locking ring of the second embodiment of the utility model in the locking position;

[0041] Figure 17 A structure diagram of the locking ring of the second embodiment of the utility model in the unlocking position;

[0042] Figure 18First structure diagram of locking ring of the second embodiment of the utility model;

[0043] Figure 19 Second structure diagram of locking ring of the second embodiment of the utility model;

[0044] Figure 20 Structure diagram of planetary gear set of the second embodiment of the utility model;

[0045] Figure 21 Exploded view of the second locking mechanism of the third embodiment of the utility model;

[0046] Figure 22 First structure diagram of locking ring of the third embodiment of the utility model;

[0047] Figure 23 Front view of fixed shell of the third embodiment of the utility model;

[0048] Figure 24 Front view of fixed shell, locking ring and locking piece of the third embodiment of the utility model.

[0049] In the figure,

[0050] 1, spray head seat; 11, driving mechanism; 111, driving motor; 112, PCB circuit board; 12, female head; 13, shell; 131, first matching part; 1311, first positioning inclined surface; 1312, second positioning inclined surface; 1313, top surface; 132, butt joint hole; 14, base; 141, support; 142, opening; 15, lock catch; 16, PCB circuit board of Hall sensor; 17, second heat dissipation fan; 18, rudder;

[0051] 2, spray head main body; 21, male head; 22, extrusion mechanism; 221, driving wire feeding wheel; 2211, gear hobbing; 222, passive wire feeding wheel; 223, first elastic member; 224, jacking block; 23, hot end assembly; 231, nozzle; 232, throat pipe; 233, heating block; 234, heat dissipation fin; 235, first heat dissipation fan; 24, front cover; 25, rear cover; 251, rotating shaft; 252, protruding part; 253, first positioning part; 26, transmission shaft; 27, positioning wheel; 271, locking groove; 281, second elastic member; 282, steel ball; 283, sleeve; 291, first bearing; 292, second bearing;

[0052] 3, wire material;

[0053] 42, cross beam; 44, sliding block;

[0054] 6, second locking mechanism; 61, locking joint; 611, locking boss; 62, locking ring; 621, abutting portion; 622, driving tooth segment; 63, driving member; 631, driving gear; 632, speed reduction motor; 64, fixed shell; 641, annular locking frame; 6411, sliding groove; 6412, locking hole; 6413, limiting edge; 651, locking plate; 652, locking inclined surface; 66, retaining ring; 67, sliding bearing; 68, locking member;

[0055] 7, planetary gear set; 71, outer gear ring; 72, output gear; 73, planet carrier; 731, limiting protrusion; 74, planet gear;

[0056] 8, elastic mechanism; 81, spring; 82, spring base; 821, limiting portion; 822, large diameter portion; 823, small diameter portion. DETAILED DESCRIPTION

[0057] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0058] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0059] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0062] First Embodiment

[0063] This embodiment provides a nozzle assembly that can be quickly docked, such as... Figures 1-2 As shown, the printhead assembly includes a printhead holder 1 and a printhead body 2. The printhead holder 1 is mounted on the crossbeam 42 of the motion mechanism of the 3D printer via a slider 44. The motion mechanism can be an X-axis, Y-axis, or Z-axis motion mechanism, etc. The printhead holder 1 has a drive mechanism 11 and a female head 12, which is drivenly connected to the drive mechanism 11. The printhead body 2 includes a male head 21, an extrusion mechanism 22, and a hot end assembly 23. The male head 21 is drivenly connected to the extrusion mechanism 22, which is used to extrude the filament 3 to the hot end assembly 23. The female head 12 can be quickly inserted into the male head 21 to form a drively connected connection, thereby allowing the printhead holder 1 to dock with the printhead body 2. The female head 12 and the male head 21 can also be quickly separated to disconnect the drively connected connection, thus separating the printhead holder 1 from the printhead body 2.

[0064] like Figures 3-5 As shown, the nozzle holder 1 includes a housing 13 and a base 14, which are fastened together to form an accommodating space. The drive mechanism 11 includes a drive motor 111 and a PCB circuit board 112, which are disposed within the accommodating space. The PCB circuit board 112 is used to control the drive motor 111, and the output shaft of the drive motor 111 is connected to the female head 12 for transmission. The shape of the female head 12 is not limited, as long as it can complement the male head 21 and achieve mating. In this embodiment, the female head 12 presents a concave star-shaped key, and the male head 21 disposed on the nozzle body 2 presents a convex star-shaped structure. The star-shaped key and the star-shaped structure are inserted and mated to transmit the power of the drive motor 111 to the extrusion mechanism 22 through the male head 21.

[0065] like Figures 6-9As shown, the nozzle body 2 comprises a front cover 24 and a rear cover 25, and the front cover 24 and the rear cover 25 are buckled to form a containing space. The rear cover 25 is arranged closer to the nozzle seat 1 than the front cover 24. The nozzle body 2 comprises a transmission shaft 26, and one end of the transmission shaft 26 has a star-shaped structure with a protrusion, i.e., the male head 21. The star-shaped structure is located outside the containing space, protrudes from the rear cover 25, and is arranged towards the female head 12 of the nozzle seat 1, and the remaining part of the transmission shaft 26 is located in the containing space. When the male head 21 is inserted into the female head 12, the male head 21 is at least partially located in the nozzle seat 1. It can be understood that the female head 12 can also be arranged to protrude from the shell 13, and the male head 21 is located in the nozzle body 2, and when the male head 21 is inserted into the female head 12, the female head 12 is located in the nozzle body 2.

[0066] As shown in Figure 7 , Figure 8 、 Figure 11 As shown, the extrusion mechanism 22 comprises a driving feed wheel 221 and a driven feed wheel 222. The driving feed wheel 221 is sleeved on the outer periphery of the shaft body of the transmission shaft 26 which is not provided with the star-shaped structure, and the driving feed wheel 221 can rotate with the transmission shaft 26. One circle of the outer periphery of the driving feed wheel 221 is provided with an inner recessed gear 2211, and the wire material 3 is extruded downward from the gap between the gear 2211 of the driving feed wheel 221 and the driven feed wheel 222. The driven feed wheel 222 is a top tight bearing in this embodiment, and the top tight bearing is tightly pressed between the top tight bearing and the driving feed wheel 221 by a top tight mechanism. The top tight mechanism comprises a first elastic member 223 and a top tight block 224, the top tight bearing is arranged at one end of the top tight block 224, a rotating shaft 251 is arranged on the inner side of the rear cover 25, the middle part of the top tight block 224 is fixed on the rotating shaft 251 and can rotate with the rotating shaft 251, the other end of the top tight block 224 is provided with a limiting groove, one end of the first elastic member 223 is located in the limiting groove, and the other end of the first elastic member 223 abuts against a protruding part 252 on the inner side of the rear cover 25. The first elastic member 223 can make the one end of the top tight block 224 provided with the top tight bearing close to the driving feed wheel 221, so as to complete the material extrusion by the cooperation of the top tight bearing and the gear 2211 of the driving feed wheel 221. As another embodiment, the driven feed wheel 222 can also be a gear with a gear 2211, and the driving feed wheel 221 and the driven feed wheel 222 are in meshing transmission, and the wire material 3 is extruded from the gap between the gear 2211 of the driving feed wheel 221 and the gear 2211 of the driven feed wheel 222.

[0067] The hot end assembly 23 is a conventional accessory of a fused deposition manufacturing (FDM) printer, and its function and structure will not be described in detail here. Generally, the hot end assembly 23 includes a nozzle 231, a throat 232, a heating block 233, a heat sink 234, and a first heat dissipation fan 235. The melted filament 3 after being extruded from the extrusion mechanism 22 enters the throat 232, the heating block 233 heats the melted filament 3, and the filament 3 is extruded from the nozzle 231 to be accumulated layer by layer on the printing platform (not shown in the figure) of the 3D printer to manufacture a 3D object. The heat sink 234 and the first heat dissipation fan 235 are used to timely remove the heat transferred by the heating block 233 to the upper side of the throat 232.

[0068] In order to realize the quick plug-in positioning of the male head 21 and the female head 12, the nozzle assembly is further provided with a first positioning mechanism. The first positioning mechanism includes a first positioning portion 253 and a first matching portion 131. The first positioning portion 253 is arranged on the nozzle body 2, specifically on the outer side of the rear cover 25. In the present embodiment, the inner side of the rear cover 25 refers to the side relatively close to the front cover 24, and the outer side of the rear cover 25 refers to the side relatively far away from the front cover 24. The first matching portion 131 is arranged on the side of the shell 13 close to the rear cover 25. The shape of the first positioning portion 253 is not limited, and in principle, as long as it is complementary to the shape of the first matching portion 131.

[0069] As shown in Figure 4 In the present embodiment, the side of the shell 13 close to the rear cover 25 is provided with a butt joint hole 132, which is used for the male head 21 of the nozzle assembly to pass through the shell 13 and butt joint with the female head 12 located in the shell 13. Four first matching portions 131 are uniformly distributed around the butt joint hole 132 along the circumference, and the first matching portions 131 protrude outward, and their width gradually decreases along the protruding direction of the first matching portions 131, which is designed to facilitate quick positioning with the first positioning portion 253.

[0070] In addition, in order to facilitate quick positioning with the first positioning portion 253, the first matching portion 131 has a first positioning inclined surface 1311, a second positioning inclined surface 1312, and a top surface 1313. The first positioning inclined surface 1311 is arranged at an angle of 20-80° with the shell 13, the second positioning inclined surface 1312 is arranged at an angle of 20-80° with the shell 13, and the top surface 1313 connects the first positioning inclined surface 1311 and the second positioning inclined surface 1312. The number, shape, and position of the first positioning portion 253 are matched with the first matching portion 131, and the first positioning portion 253 has a recess structure that is recessed inward. The two sets of inclined surfaces can accurately ensure the combination and separation of the nozzle seat 1 and the nozzle body 2.

[0071] On the basis of the first positioning structure, the nozzle seat 1 and the nozzle body 2 have been accurately positioned and aligned, and the male head 21 and the female head 12 can be inserted and docked, but the connection between the nozzle seat 1 and the nozzle body 2 is still unreliable, and the nozzle seat 1 needs to be clamped and fixed with the nozzle body 2. However, frequent plugging and unplugging between the nozzle body 2 and the nozzle seat 1 will cause wear of the clamping structure, affect the use precision, and cause the quality of the printed products to be reduced.

[0072] To solve the above problems, the first locking mechanism includes a lock catch 15, a positioning wheel 27, and a power mechanism for driving the movement of the lock catch 15. In this embodiment, the power mechanism is a rudder 18, the lock catch 15 is connected with the rudder 18, and the rudder 18 can drive the lock catch 15 to move between the first position and the second position. In order to save electrical components and enable a 3D printer with multiple nozzle bodies 2 to share a set of driving mechanisms, the rudder 18 and the lock catch 15 are arranged in the shell 13 of the nozzle seat 1, and the positioning wheel 27 is arranged in the nozzle body 2. In order to detect the position of the lock catch 15, a detection mechanism can be arranged in the nozzle seat 1, such as a magnet arranged on the lock catch 15 and a Hall sensor arranged near the lock catch 15. When the lock catch 15 is located at the first position / second position, the Hall sensor detects the signal of the magnet, thereby detecting the position of the lock catch 15. In addition, in order to detect whether the nozzle seat 1 has grasped the nozzle body 2, a photoelectric sensor can also be arranged on the nozzle seat 1. The PCB circuit board 16 integrating the photoelectric sensor and the Hall sensor is exemplarily shown in the figure.

[0073] The positioning wheel 27 is located at the center of the first positioning part 253 of the rear cover 25, the positioning wheel 27 protrudes outward from the rear cover 25, the diameter of the positioning wheel 27 is adapted to the docking hole 132, and when the male head 21 and the female head 12 are docked, the positioning wheel 27 is at least partially located in the nozzle seat shell 13. The positioning wheel 27 has a locking groove 271 in the circumferential direction thereof, when the male head 21 and the female head 12 are docked, the locking groove 271 is located in the nozzle seat shell 13, the rudder 18 drives the lock catch 15 to swing upward from the first position to the second position, at this time, the lock catch 15 is clamped with the locking groove 271. When the male head 21 and the female head 12 need to be separated, the rudder 18 drives the lock catch 15 to move downward from the second position to the first position, and the lock catch 15 is unclamped with the locking groove 271.

[0074] As Figure 7 and Figure 9As shown, the nozzle body 2 further comprises a second elastic member 281, a steel ball 282, and a sleeve 283. The sleeve 283 is arranged on the side of the rear cover 25 close to the front cover 24, the second elastic member 281 is located in the sleeve 283, and the steel ball 282 is located between the second elastic member 281 and the transmission shaft 26. The second elastic member 281 and the steel ball 282 make the transmission shaft 26 have a certain elastic extension. If the first docking angle is problematic when the female head 12 is docked, the transmission shaft 26 can be compressed and retreated to re-adjust the docking position, provide a buffer space, and improve the docking success rate and docking speed. In addition, the nozzle body 2 further comprises a first bearing 291 and a second bearing 292. The first bearing 291 and the second bearing 292 are respectively sleeved on both ends of the driving wire feeding wheel 221, and play a supporting role.

[0075] In addition, as Figure 10 shown, the nozzle seat 1 can also be provided with a second cooling fan 17. The second cooling fan 17 is arranged below the PCB circuit board 112 and is used for cooling the PCB circuit board 112. The base 14 is also provided with a support 141. The support 141 extends outward from the base 14. After the nozzle body 2 is docked with the nozzle seat 1, the support 141 contacts the lower end of the nozzle body 2 and plays a supporting role. The supports 141 have an opening 142 therebetween, which allows the hot end assembly 23 to pass through and does not affect the normal printing work of the hot end assembly 23.

[0076] Second embodiment

[0077] In this embodiment, the first locking mechanism can also be replaced by a second locking mechanism.

[0078] As Figures 13-17 shown, the second locking mechanism 6 comprises a locking connector 61, a locking ring 62, a locking structure, and a driving member 63. The locking connector 61 is arranged on the nozzle body 2 and has a locking boss 611. The driving member 63 and the locking ring 62 are arranged on the nozzle seat 1. The locking structure is arranged in the locking ring 62. The driving member 63 can drive the locking ring 62 to rotate so that the locking ring 62 has a locking position (as Figure 16 shown) and an unlocking position (as Figure 17 shown). When the locking ring 62 is in the unlocking position, the locking boss 611 can pass through the locking ring 62. When the locking ring 62 is in the locking position, the locking structure can be clamped between the locking boss 611 and the nozzle body 2 and abut against the locking boss 611 to lock the nozzle body 2 and the nozzle seat 1.

[0079] The nozzle assembly is quick to dock. The nozzle body 2 and the nozzle seat 1 are docked by the second locking mechanism 6, and are quick to disassemble and assemble. When the driving member 63 drives the locking ring 62 to the unlocking position, the nozzle body 2 is docked with the nozzle seat 1, the locking boss 611 of the locking connector 61 passes through the locking ring 62, and then the driving member 63 drives the locking ring 62 to rotate to the locking position. At this time, the locking structure arranged in the locking ring 62 can be clamped between the locking boss 611 and the nozzle body 2 and abut against the locking boss 611, so as to lock the nozzle body 2 and the nozzle seat 1. When the nozzle body 2 needs to be replaced, the driving member 63 drives the locking ring 62 to rotate from the locking position to the unlocking position, so that the locking boss 611 exits the locking ring 62, that is, the separation of the nozzle body 2 and the nozzle seat 1 is completed.

[0080] The nozzle assembly is quick to dock. The nozzle body 2 and the nozzle seat 1 are docked by the second locking mechanism 6, and are quick to disassemble and assemble. When the driving member 63 drives the locking ring 62 to the unlocking position, the nozzle body 2 is docked with the nozzle seat 1, the locking boss 611 of the locking connector 61 passes through the locking ring 62, and then the driving member 63 drives the locking ring 62 to rotate to the locking position. At this time, the locking structure arranged in the locking ring 62 can be clamped between the locking boss 611 and the nozzle body 2 and abut against the locking boss 611, so as to lock the nozzle body 2 and the nozzle seat 1. When the nozzle body 2 needs to be replaced, the driving member 63 drives the locking ring 62 to rotate from the locking position to the unlocking position, so that the locking boss 611 exits the locking ring 62, that is, the separation of the nozzle body 2 and the nozzle seat 1 is completed.

[0081] In the embodiment, the second locking mechanism 6 further comprises a fixed shell 64, the fixed shell 64 is detachably arranged in the nozzle seat 1, the locking ring 62 is rotationally arranged in the fixed shell 64, and the locking ring 62 and the fixed shell 64 are slidably connected through a sliding bearing 67, so as to reduce the friction between the locking ring 62 and the fixed shell 64. The driving member 63 further comprises a speed reducer motor 632, the speed reducer motor 632 is fixedly arranged in the fixed shell 64, and the output shaft and the driving gear 631 are coaxially and fixedly connected. The fixed shell 64 can form a module of each structure of the second locking mechanism, so as to facilitate maintenance and replacement, and reduce the cost.

[0082] In order to prevent the locking ring 62 from being separated from the fixed shell 64, the fixed shell 64 is further provided with a check ring 66, the check ring 66 is slidably abutted against one side of the locking ring 62 facing the nozzle body 2, so as to ensure the integrity of the second locking mechanism 6.

[0083] As shown in Figures 14-19 The locking structure comprises a locking plate 651 arranged on the inner wall of the locking ring 62. In the docking direction of the nozzle body 2 and the nozzle seat 1, when the locking ring 62 is in the unlocking position, the locking plate 651 is staggered with the locking boss 611. At this time, when the nozzle seat 1 is docked with the nozzle body 2, the locking connector 61 can pass through the locking ring 62, and the locking plate 651 cannot block the locking boss 611. When the locking ring 62 is in the locking position, the locking plate 651 and the locking boss 611 are partially overlapped. If the locking connector 61 passes through the locking ring 62, the locking plate 651 can block the locking boss 611. At this time, the locking connector 61 cannot exit the locking ring 62, so as to realize the locking between the nozzle seat 1 and the nozzle body 2.

[0084] Further, the locking structure comprises two locking plates 651 which are centrally symmetrical relative to the axis of the locking ring 62, and the locking joint 61 has two locking bosses 611 corresponding to the two locking plates 651. The cooperation between the two locking plates 651 and the two locking bosses 611 can ensure that the locking force is evenly distributed on the basis of locking the nozzle seat 1 and the nozzle body 2, so that the nozzle body 2 will not be offset, and the printing accuracy is ensured.

[0085] It can be understood that, in order to ensure that the nozzle body 2 can remain stable after being locked on the nozzle seat 1, there should be no gap between the locking plate 651 and the locking boss 611 when the locking ring 62 is in the locked position, and abutment is required, but this can easily cause the locking plate 651 to be difficult to be clamped between the locking boss 611 and the nozzle body 2 through the rotation of the locking ring 62. As shown in Figure 18 and Figure 19 To solve the above problem, the side of the locking plate 651 away from the nozzle body 2 is provided with a first locking inclined surface 652, which is inclined towards the nozzle body 2 along the rotation direction of the locking ring 62 from the unlocked position to the locked position.

[0086] That is, when the locking ring 62 starts to rotate from the unlocked position to the locked position, there is a gap between the first locking inclined surface 652 and the locking boss 611, which facilitates the clamping of the first locking inclined surface 652 between the locking boss 611 and the nozzle body 2. With the rotation of the locking ring 62, the first locking inclined surface 652 gradually abuts against the locking boss 611, thereby locking the nozzle seat 1 and the nozzle body 2.

[0087] It can be understood that the output shaft of the driving motor 111 has a high rotation speed, which can easily cause the extrusion mechanism 22 to have a high extrusion rate of the consumables, thereby affecting the printing effect. As shown in Figure 20 To solve the above problem, the nozzle seat 1 further comprises a planetary gear set 7, and the output shaft of the driving motor 111 is in transmission connection with the female head 12 through the planetary gear set 7. The planetary gear set 7 can function as a speed reducer to reduce the high rotation speed of the output shaft of the driving motor 111 to a low rotation speed of the female head 12, thereby ensuring the stable operation of the extrusion mechanism 22.

[0088] Specifically, the planetary gear set 7 comprises an outer gear ring 71, an output gear 72 and a planet carrier 73, the outer gear ring 71 is fixedly arranged on the nozzle seat 1, the output gear 72 is rotatably arranged in the outer gear ring 71 and connected with the output shaft of the driving motor 111, the planet carrier 73 is rotatably arranged in the outer gear ring 71 and connected with the female head 12, and a planet gear 74 is rotatably arranged on the planet carrier 73 and engaged with the output gear 72 and the outer gear ring 71.

[0089] The external gear ring 71 remains stationary. When the output shaft of the drive motor 111 rotates, the output gear 72 drives the planetary gears 74 to rotate. The planetary gears 74, in turn, drive the planet carrier 73 to rotate via the external gear ring 71. The planet carrier 73 is the power output structure. Because multiple planetary gears 74 in the planetary gear set 7 mesh with the output gear 72 simultaneously, the load is evenly distributed, reducing the wear of individual gears and extending their service life.

[0090] In addition, an elastic mechanism 8 is provided between the female head 12 and the planetary gear set 7 to provide a certain elastic force. The elastic mechanism 8 includes a spring 81 and a spring base 82. The end of the planet carrier 73 away from the planet gear 74 is hollow and has a limiting protrusion 731, which protrudes in the direction of the axis of the planet carrier 73. The spring base 82 has a limiting part 821 and a column part. The column part includes a large diameter part 822 and a small diameter part 823. The limiting part 821 and the large diameter part 822 are connected, and the large diameter part 822 and the small diameter part 823 are connected. The spring base 82 is installed inside the planet carrier 73. Specifically, the column part passes through the limiting protrusion 731, and the limiting part 821 is limited by the limiting protrusion 731 at the end away from the female head 12. One end of the female head 12 is located inside the planet carrier 73 and fits around the outer periphery of the small diameter part 823. The other end of the female head 12 is located outside the planet carrier 73. Spring 81 is fitted around the outer periphery of the large diameter portion 822. One end of spring 81 abuts against the end of the limiting protrusion 731 that is closer to the female head 12, and the other end abuts against the female head 12.

[0091] When the female connector 12 and male connector 21 are mated, the spring 81 provides a certain degree of elasticity. If there is an issue with the initial mating angle when mating with the male connector 21, the spring 81 can compress and retract to readjust the mating position, providing buffer space and improving the success rate and speed of mating. Furthermore, placing the spring 81 at the female connector 12 end, rather than at the male connector 21 end with the extrusion mechanism 22, solves the problem of limited expansion space and poor buffering effect of the spring 81 when it is located at the male connector 21 end and there is consumable material inside the extrusion mechanism 22.

[0092] like Figures 16-19 As shown, the locking ring 62 includes a drive tooth segment 622, and the drive member 63 includes a drive gear 631. The drive tooth segment 622 and the drive gear 631 mesh. The drive gear 631 is driven to rotate by a reduction motor 632, thereby causing the locking ring 62 to rotate.

[0093] Furthermore, the fixed housing 64 has a limiting notch, the locking ring 62 is provided with a limiting block, the drive gear segment 622 is provided on the limiting block, the limiting block meshes with the drive gear 631 through the limiting notch, the limiting notch can limit the rotation angle of the locking ring 62, when the limiting block abuts against one side of the limiting notch, the locking ring 62 is in the unlocked position, when the limiting block abuts against the other side of the limiting notch, the locking ring 62 is in the locked position.

[0094] In order to simplify the structure, the driving tooth segment 622 can be arranged on the limiting block. Since the limiting block can extend out of the fixing shell 64, it is convenient to contact and engage with the driving gear 631.

[0095] In order to detect the position of the locking ring 62, a detection mechanism can be arranged in the nozzle seat 1. For example, a magnet is arranged on the limiting block, and a Hall sensor is arranged near the locking ring 62. When the locking ring 62 is in the locked position / unlocked position, the Hall sensor detects the signal of the magnet, thereby detecting the position of the locking ring 62. In addition, in order to detect whether the nozzle seat 1 has grasped the nozzle body 2, a photoelectric sensor can also be arranged on the nozzle seat 1.

[0096] Third embodiment

[0097] The present embodiment changes the structure of the second locking mechanism 6 on the basis of the second embodiment.

[0098] As shown in Figures 21-24 In the present embodiment, the second locking mechanism 6 further includes an annular locking frame 641, the annular locking frame 641 is provided with a sliding groove 6411 in the circumferential direction, and the sliding groove 6411 penetrates to the inner wall of the annular locking frame 641 to form a locking hole 6412, the locking structure includes a locking piece 68 arranged in the sliding groove 6411, and the locking ring 62 surrounds the outer periphery of the annular locking frame 641. When the locking ring 62 is in the unlocked position, the locking piece 68 is located in the sliding groove 6411. At this time, the nozzle seat 1 is butted against the nozzle body 2, the locking connector 61 can pass through the locking ring 62, and the locking piece 68 cannot block the locking boss 611. When the locking ring 62 is in the locked position, if the locking connector 61 passes through the locking ring 62, the locking ring 62 makes the locking piece 68 partially protrude out of the locking hole 6412 to be clamped between the locking boss 611 and the nozzle body 2, so that the locking piece 68 can block the locking boss 611. At this time, the locking connector 61 cannot exit the locking ring 62, thereby realizing the locking between the nozzle seat 1 and the nozzle body 2.

[0099] As shown in Figure 24 The inner wall of the locking ring 62 is provided with an abutting portion 621. When the locking ring 62 rotates from the unlocked position to the locked position, the size of the abutting portion 621 protruding to the center of the locking ring 62 gradually increases at the position of the locking piece 68. With the rotation of the locking ring 62 from the unlocked position to the locked position, the abutting portion 621 gradually presses the locking piece 68 out of the locking hole 6412. The side of the abutting portion 621 abutting against the locking piece 68 is a continuous plane or an arc surface, which can avoid the situation that the abutting portion 621 and the locking piece 68 are stuck.

[0100] In the embodiment, the annular locking frame 641 is provided with a plurality of sliding grooves 6411 which are circumferentially spaced, and each of the sliding grooves 6411 is provided with a locking piece 68. That is, when the locking ring 62 is rotated to the locking position, the plurality of locking pieces 68 can be clamped between the locking boss 611 and the nozzle body 2 from a plurality of positions in the circumferential direction. Through the cooperation between the plurality of locking pieces 68 and the corresponding locking boss 611, the locking force can be evenly distributed on the basis of locking the nozzle seat 1 and the nozzle body 2, so that the nozzle body 2 will not be offset, and the printing precision is ensured. It should be noted that the abutting portion 621 in the locking ring 62 corresponds to the sliding groove 6411 and the locking piece 68 one by one.

[0101] In the embodiment, the locking boss 611 is an annular structure which circumferentially surrounds the locking joint 61 and connects the head and the tail. No matter what angle the locking joint 61 is connected to the nozzle body, the structure can ensure that the locking joint 61 is clamped and locked by the plurality of locking pieces 68 when the nozzle body is connected to the nozzle seat 1.

[0102] It can be understood that when the nozzle body is not connected to the nozzle seat 1, the locking piece 68 cannot slide out of the locking hole 6412. As shown in FIG. 6, in order to achieve the above purpose, a limiting edge 6413 is arranged at the locking hole 6412, and the limiting edge 6413 can abut against the locking piece 68 to avoid the locking piece 68 from being separated from the sliding groove 6411 through the locking hole 6412. Figure 23

[0103] Further, the locking piece 68 is a steel ball 282. The steel ball 282 is used to lock the locking joint 61, so that the contact surface of the steel ball 282 and the locking boss 611 is an arc surface. As the size of the steel ball 282 extending out of the locking hole 6412 increases, the steel ball 282 can realize the effect of tensioning the locking boss 611, thereby improving the abutting force between the nozzle body 2 and the nozzle seat 1 and improving the stability of the nozzle body 2 relative to the nozzle seat 1. The diameter of the locking hole 6412 is smaller than the diameter of the steel ball 282, which effectively avoids the steel ball 282 from sliding out of the sliding groove 6411.

[0104] The above is only the preferred embodiment of the present application, and the protection scope of the present application is subject to the scope defined by the claims. Some improvements and decorations made by those skilled in the art without departing from the spirit and scope of the present application should also be considered as the protection scope of the present application.​

Claims

1. A quick-connect nozzle assembly, characterized in that, include: Nozzle body (2) and nozzle base (1); The second locking mechanism (6) includes a locking connector (61), a locking ring (62), a locking structure, and a driving member (63). The locking connector (61) is disposed on the nozzle body (2) and has a locking boss (611). The driving member (63) and the locking ring (62) are disposed on the nozzle seat (1). The locking structure is disposed inside the locking ring (62). The driving member (63) can drive the locking ring (62). The locking ring (62) is rotated to have a locked position and an unlocked position. When the locking ring (62) is in the unlocked position, the locking boss (611) can pass through the locking ring (62). When the locking ring (62) is in the locked position, the locking structure can engage between the locking boss (611) and the nozzle body (2) and abut against the locking boss (611) to lock the nozzle body (2) and the nozzle seat (1).

2. The quick-connect nozzle assembly according to claim 1, characterized in that, The locking structure includes a locking plate (651) disposed on the inner wall of the locking ring (62). Along the docking direction between the nozzle body (2) and the nozzle seat (1), when the locking ring (62) is in the unlocked position, the locking plate (651) is offset from the locking boss (611), and when the locking ring (62) is in the locked position, the locking plate (651) overlaps with the locking boss (611).

3. The quick-connect nozzle assembly according to claim 2, characterized in that, The locking plate (651) has a first locking slope (652) on the side away from the nozzle body (2). Along the rotation direction of the locking ring (62) from the unlock position to the locking position, the first locking slope (652) is inclined towards the nozzle body (2).

4. The quick-connect nozzle assembly according to claim 2, characterized in that, The locking structure includes two locking plates (651) that are centrally symmetrical about the axis of the locking ring (62), and the locking joint (61) has two locking bosses (611) that correspond one-to-one with the two locking plates (651).

5. The quick-connect nozzle assembly according to claim 1, characterized in that, The second locking mechanism (6) further includes an annular locking frame (641), which has a circumferential groove (6411) and the groove (6411) extends to the inner wall of the annular locking frame (641) to form a locking hole (6412). The locking structure includes a locking member (68) disposed in the groove (6411) and a locking ring (62) surrounding the outer periphery of the annular locking frame (641). When the locking ring (62) is in the unlocked position, the locking member (68) is located in the groove (6411). When the locking ring (62) is in the locked position, the locking ring (62) causes the locking member (68) to extend out of the locking hole (6412) to engage between the locking boss (611) and the nozzle body (2).

6. The quick-connect nozzle assembly according to claim 5, characterized in that, The inner wall of the locking ring (62) is provided with an abutment portion (621). When the locking ring (62) rotates from the unlocking position to the locking position, the abutment portion (621) gradually increases in size from the position of the locking member (68) toward the center of the locking ring (62).

7. The quick-connect nozzle assembly according to claim 5, characterized in that, The annular locking frame (641) is provided with a plurality of grooves (6411) spaced apart circumferentially, and each groove (6411) is provided with a locking element (68); and / or, The locking boss (611) is a ring structure that surrounds the locking connector (61) in the circumferential direction and is connected end to end.

8. The quick-connect nozzle assembly according to claim 5, characterized in that, A limiting edge (6413) is provided at the locking hole (6412), and the limiting edge (6413) can abut against the locking member (68) to prevent the locking member (68) from disengaging from the slide groove (6411) through the locking hole (6412).

9. The quick-connect nozzle assembly according to any one of claims 1 to 8, characterized in that, The locking ring (62) includes a drive tooth segment (622), and the drive member (63) includes a drive gear (631). The drive tooth segment (622) and the drive gear (631) mesh.

10. The quick-connect nozzle assembly according to any one of claims 1 to 8, characterized in that, The nozzle holder (1) further includes a drive mechanism (11), a planetary gear set (7), and a female head (12). The nozzle body (2) includes a male head (21) and an extrusion mechanism (22). The male head (21) is drivenly connected to the extrusion mechanism (22). The female head (12) can be inserted into the male head (21) so that the female head (12) and the male head (21) are drivenly connected. The planetary gear set (7) includes: An external gear ring (71) is fixedly mounted on the nozzle seat (1); Output gear (72), which is rotatably disposed in the external gear ring (71) and connected to the output shaft of the drive mechanism (11); Planetary carrier (73) is rotatably disposed within the external gear ring (71) and connected to the female head (12). Planetary gears (74) are rotatably disposed on the planetary carrier (73), and the planetary gears (74) mesh with the output gear (72) and the external gear ring (71).

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