CN114228134B - 3D printer - Google Patents

Abstract

The application relates to a 3D printer, including base, fixed connection in the support body frame of base and set up in the print head of support body frame, the base is connected with along vertical sliding and prints the movable table, the support body frame includes fixed connection in the stand of base, fixed connection in the fixed beam at stand top and along vertical sliding connection in the movable beam of stand, print head along horizontal sliding connection in movable beam, fixed beam can dismantle the unreeling frame that is connected with coil stock and unreel, and the fixed beam protrusion is provided with the installation department, and first spout has been seted up along vertically to one side of installation department, unreeling frame includes mounting plate, and the mounting plate protrusion is provided with the location portion of sliding connection in first spout, the mounting plate has the location portion that is the elasticity setting, and the locating hole has been seted up along vertical to the up end protrusion of location portion, and the lower terminal surface protrusion of location portion is provided with the reference column of inserting and locating hole. This application has the effect that improves the dismouting efficiency of unreeling frame.

Description

3D printer

Technical Field

The application relates to the technical field of 3D printing, in particular to a 3D printer.

Background

The currently commonly used FDM (Fused Deposition Modeling) 3D printer adopts a fused deposition manufacturing process, adopts thermoplastic materials such as ABS, nylon and the like, and adopts linear thermoplastic materials for feeding. The material is melted by heating in the nozzle, which moves along the cross-sectional profile and filling trajectory of the part, while the melted material is extruded, rapidly solidifies, and solidifies with the surrounding material.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: the unreeling frame is detachably connected to the existing 3D printer main frame through bolts, the unreeling frame is provided with an unreeling device for unreeling thermoplastic materials, in the printing process, when the coil materials on the unreeling device are used up, workers need to detach the unreeling frame to replace new coil materials, the disassembling and assembling bolts take more time, the printing efficiency is reduced, and therefore further improvement is needed.

Disclosure of Invention

In order to improve the dismouting efficiency of unreeling frame, this application provides a 3D printer.

The application provides a 3D printer adopts following technical scheme:

the utility model provides a 3D printer, includes base, fixed connection in the support body frame of base and set up in the print head of support body frame, the base is connected with along vertical sliding and is located the printing mobile station of print head below, the support body frame includes fixed connection in the stand of base, fixed connection in the fixed beam at stand top and along vertical sliding and be connected in the movable beam of stand, the print head is connected in the movable beam along horizontal sliding, fixed beam can dismantle the unreel frame that is connected with coil material and unreel, and the fixed beam protrusion is provided with the installation department, and first spout has been seted up along vertically to one side of installation department, unreel the frame includes the mounting plate, and the mounting plate protrusion is provided with the first smooth protruding of connection in first spout that slides, the mounting plate has the location portion that is the elasticity setting, and the locating hole has been seted up along vertical to the up end of installation portion, the lower terminal surface protrusion of location portion is provided with the reference column of locating hole.

Through adopting above-mentioned technical scheme, when installing unreeling frame, the notch that aligns the first spout on the installation department with first smooth protruding, make first smooth protruding slip get into first spout, apply upward effort to the one end that the locating part had the reference column, make it upwarp, make terminal surface butt in installation department up end under the reference column, the installation bottom plate slides the in-process, when the reference column slides to the locating hole, the locating part elasticity resets and forces the reference column to inlay and locate the locating hole, thereby restrict the slip of installation bottom plate with damping form, when dismantling unreeling frame, apply upward effort to the one end that the locating part had the reference column, make it upwarp, make the reference column slide and break away from the locating hole, promote the installation bottom plate simultaneously and make first smooth protruding slide break away from first spout, realize the quick assembly disassembly of fixed cross beam and unreeling frame, improve unreeling frame's dismouting efficiency.

Preferably, the side surface of the mounting part with the first chute notch is provided with a first guiding inclined surface for the outer wall of the positioning column to abut against so as to force the positioning part to bend and deform upwards.

Through adopting above-mentioned technical scheme, when installing unreeling frame, aim at the notch of the first spout on the installation department with first smooth protruding and make first smooth protruding the entering first spout that slides, promote mounting plate along the level, the mounting plate slides in-process, the outer wall butt of reference column is in first direction inclined plane when, first direction inclined plane breaks down into vertical component with horizontal effort, make the one end that the location portion had the reference column upwarp, continue to promote the mounting plate and slide, slide to the locating hole when the reference column, the location portion elasticity resets and forces the reference column to inlay and locate the locating hole.

Preferably, the positioning column is inserted in the positioning hole, and a second guiding inclined plane for abutting against the inner wall of the positioning hole to force the positioning part to bend upwards is arranged on one side of the positioning column, which is close to the notch of the first chute.

Through adopting above-mentioned technical scheme, when dismantling unreeling frame, apply the effort along first spout extending direction to mounting plate, the inner wall butt in the second direction inclined plane of reference column of the notch that the locating hole is close to first spout, the second direction inclined plane breaks down horizontal effort into vertical component for the one end that the location portion had the reference column upwarps, continues to promote the mounting plate and slides, makes the reference column slide and breaks away from the locating hole, promotes the mounting plate simultaneously and makes first smooth protruding slip break away from first spout.

Preferably, the unreeling frame further comprises a connecting arm fixedly connected to the mounting bottom plate and an unreeling shaft fixedly connected to the connecting arm, the unreeling shaft is provided with an unreeling shaft in a sliding sleeve mode, materials are wound on the unreeling shaft, the unreeling shaft and the unreeling shaft rotate relatively, the unreeling shaft is movably connected with a limiting block, and the unreeling shaft is provided with a control mechanism for driving the limiting block to move and be abutted to the end face of the unreeling shaft.

Through adopting above-mentioned technical scheme, when changing the reel that puts, move to the position department that does not interfere with the reel track that slides with the reel that puts through control mechanism drive stopper, take out the reel that puts that uses up, place the new reel that puts that has the coil of wire material after, control mechanism drive stopper move to the butt in the reel terminal surface position department that puts to prevent effectively that the reel that puts from sliding in the back and breaking away from the reel that puts.

Preferably, one end of the limiting block is hinged to the outer end face of the unwinding shaft, the control mechanism comprises a driving rod, a force application plate and a first elastic piece, the driving rod is axially slidably inserted into the unwinding shaft, the force application plate is fixedly connected to the driving rod and located outside the unwinding shaft, the first elastic piece is fixedly connected between the force application plate and the unwinding shaft to force the driving rod to slide in the direction away from the limiting block, the limiting block is enabled to be abutted to the end face of the unwinding shaft, the second sliding protrusion is slidably connected with the limiting block, and the driving rod penetrates through the unwinding shaft and is hinged to the second sliding protrusion.

Through adopting above-mentioned technical scheme, when changing the reel that puts, press the application of force board and make the actuating lever slide towards being close to the stopper direction for the free end of stopper rotates to the position department that does not interfere with the track of sliding of putting the reel around its pin joint, and first elastic component takes place elastic deformation and has elastic potential energy this moment, takes out the reel that puts that uses up, places the reel that puts of new tape reel material after, removes the effort to the application of force board, and first elastic component forces the actuating lever to slide towards keeping away from the stopper direction to drive the stopper rotation butt in putting the reel terminal surface that resets, thereby prevent effectively that putting the reel reverse slip and breaking away from the play spool.

Preferably, the unwinding shaft is hollow, a first sliding cavity communicated with an inner cavity of the unwinding shaft is formed in the side wall of the unwinding shaft along the radial direction, the limiting block is connected to the first sliding cavity in a sliding mode, and the control mechanism comprises a driving rod which is inserted into the unwinding shaft in a sliding mode along the axial direction, a hinging rod, a force application plate and a first elastic piece, one end of the hinging rod is hinged to the driving rod, the other end of the hinging rod is hinged to the limiting block, the force application plate is fixedly connected to the driving rod and located outside the unwinding shaft, and the first elastic piece is fixedly connected between the force application plate and the unwinding shaft so as to force the limiting block to retract into the first sliding cavity.

Through adopting above-mentioned technical scheme, when changing the reel that puts, apply the effort towards keeping away from the actuating lever direction to the application of force board for the actuating lever slides towards keeping away from the stopper direction, drives the stopper through the articulated lever and slides and shrink in first chamber that slides, first elastic component takes place elastic deformation and have elastic potential energy this moment, take out the reel that puts that uses up, place the reel that puts of new tape reel material after, remove the effort to the application of force board, first elastic component forces the actuating lever to slide and reset, thereby drive the stopper and slide and reset the butt in putting the reel terminal surface, thereby prevent effectively that the reel is put in reverse slipping and is broken away from out the reel.

Preferably, the printing head comprises a printing seat, a power feeding mechanism arranged on the printing seat for feeding materials and a printing mechanism arranged on the printing seat for melting and printing the materials; the printing seat comprises a base which is connected to the movable cross beam in a sliding manner and an installation seat which is arranged on the base, the installation seat comprises an installation main seat fixedly connected to the base and a movable auxiliary seat hinged to the installation main seat, the installation main seat is provided with an installation cavity, a feeding hole which is communicated with the installation cavity for materials to pass through is formed in the top of the installation main seat, a charging operation hole which is communicated with the installation cavity is formed in one side of the installation main seat, the lower part of the movable auxiliary seat is hinged to the inner side wall of the charging operation hole through a hinge shaft so as to control the charging operation hole to be opened and closed, the power feeding mechanism comprises a driving roller which is connected to the installation main seat in a rotating manner and a driven roller which is connected to the movable auxiliary seat in a rotating manner, materials pass through between the driving roller and the driven roller, and a fixing mechanism is arranged between the movable auxiliary seat and the installation main seat so that the free end of the movable auxiliary seat can be detachably connected to the installation main seat.

Through adopting above-mentioned technical scheme, pass the feed inlet with the one end of material and stretch into the installation intracavity, release fixed establishment and to the locking of the free end of activity auxiliary seat, the free end of upset activity auxiliary seat makes the loading operation mouth be the open state, will stretch into the material of installation intracavity and place on the drive roll and the material lower extreme extends printing mechanism in, upset activity auxiliary seat for the driven voller draws close towards being close to the drive roll direction, makes drive roll and driven voller press from both sides tightly the material, carries out the lock to the free end of activity auxiliary seat through fixed establishment, accomplishes the loading.

Preferably, the mounting main seat is provided with a limiting hole, and the fixing mechanism comprises a limiting rod penetrating through the movable auxiliary seat in a sliding manner, a mounting plate fixedly connected to the limiting rod and positioned outside the movable auxiliary seat, and a second elastic piece fixedly connected between the movable auxiliary seat and the mounting plate so as to force the limiting rod to be inserted into the limiting hole.

Through adopting above-mentioned technical scheme, before overturning movable auxiliary seat, need apply the effort towards keeping away from spacing hole direction to the gag lever post for spacing hole is gone out in the slippage of gag lever post tip, and the second elastic component has and takes place elastic deformation and have elastic potential energy this moment, and the staff overturns the free end of movable auxiliary seat, and the material is loaded the back, before the free end of reverse upset movable auxiliary seat, the staff need last to apply the effort to the gag lever post, after movable auxiliary seat butt in the installation master seat, removes the effort, and the second elastic component elasticity resets forces the gag lever post to slide and inserts and locate spacing hole, realizes the lock solid.

Preferably, the second sliding cavity communicated with the feeding hole is formed in the top wall of the installation main seat, the second sliding cavity is communicated with the limiting hole, the installation main seat is provided with a movable plate which is connected with the second sliding cavity in a sliding mode, a through hole for materials to pass through is formed in the movable plate, a third elastic piece is arranged between the inner wall of the second sliding cavity and the movable plate, after the limiting rod is inserted into the limiting hole, the limiting rod is abutted to the side wall of the movable plate to force the movable plate to slide so that the through hole of the movable plate and the feeding hole are in a right-facing state, at the moment, the third elastic piece is elastically deformed, and the elastic force of the third elastic piece is smaller than the elastic threshold value of the second elastic piece.

Through adopting above-mentioned technical scheme, when needs are loaded, pass the lower extreme of material feed inlet and pass the through-hole of fly leaf earlier, after the gag lever post slides and breaks away from spacing hole, third elastic component elasticity resets and forces the fly leaf to slide a section distance for the fly leaf exerts certain clamping force to the material, at this moment, the staff need exert effort to the material and just can pull the material downwardly extending, on the one hand, reduce the overlength that the staff pulled the material, lead to piling up the possibility of material in the throat, on the other hand, fix in advance the material, the possibility that the material takes place to rock is reduced.

Preferably, the installation main seat is provided with a driving motor for driving the driving roller to rotate, the inner wall of the through hole of the movable plate is provided with a pressure sensor, the power-on or power-off of the driving motor is realized through the pressure sensor, and when the pressure value acting on the pressure sensor reaches a set value, the driving motor is in a power-off state.

Through adopting above-mentioned technical scheme, the fly leaf slides and makes the through-hole and the feed inlet dislocation of fly leaf, supports tightly the material, and pressure sensor senses the effort for driving motor is in the outage state, improves the security of charging operation, inserts after locating spacing hole when the gag lever post, and the gag lever post butt is in the fly leaf reverse slip, makes the through-hole and the feed inlet of fly leaf be in just to the state, and pressure sensor does not sense the effort this moment, and driving motor is in the circular telegram state, makes the printer head can normally carry out the printing work.

In summary, the present application includes at least one of the following beneficial technical effects:

when the unreeling frame is installed, the first sliding lug is aligned with the notch of the first sliding groove on the installation part, so that the first sliding lug slides into the first sliding groove, an upward acting force is applied to one end of the positioning part with the positioning column, the positioning column is lifted upwards, the lower end face of the positioning column is abutted to the upper end face of the installation part, in the sliding process of the installation bottom plate, when the positioning column slides to the positioning hole, the positioning part elastically resets to force the positioning column to be embedded in the positioning hole, thereby limiting the sliding of the installation bottom plate in a damping mode, when the unreeling frame is disassembled, an upward acting force is applied to one end of the positioning part with the positioning column, the positioning column is lifted upwards, the positioning column is lifted to slide and separate from the positioning hole, and meanwhile, the installation bottom plate is pushed to slide and separate the first sliding lug from the first sliding groove, so that the fixed cross beam and the unreeling frame are quickly assembled and disassembled, and the disassembling efficiency of the unreeling frame is improved;

the fly leaf slides and makes the through-hole and the feed inlet dislocation of fly leaf, supports tightly the material, and pressure sensor senses the effort for driving motor is in the outage state, improves the security of charging operation, inserts after locating spacing hole when the gag lever post, and the gag lever post butt is in the fly leaf reverse slip, makes through-hole and the feed inlet of fly leaf be in just to the state, and pressure sensor does not sense the effort this moment, and driving motor is in the energized state, makes the printer head can normally carry out the printing work.

Drawings

Figure 1 is a schematic diagram of the overall structure of a 3D printer in embodiment 1,

fig. 2 is a schematic view of the structure of the unreeling rack and the fixed cross member in embodiment 1.

Fig. 3 is a schematic structural view of the mounting baseplate in embodiment 1.

Fig. 4 is a schematic structural view of a stopper and a control mechanism in embodiment 1.

Fig. 5 is a schematic diagram showing the overall structure of the printhead in embodiment 1.

Fig. 6 is a schematic structural view of the mount and the printing mechanism in embodiment 1.

Fig. 7 is a schematic structural view of the fixing mechanism in embodiment 1.

Fig. 8 is a schematic structural view of the power feeding mechanism in embodiment 1.

Fig. 9 is a schematic view of the structure of the movable sub-seat in embodiment 1.

Fig. 10 is a schematic structural view of a stopper in embodiment 2.

Fig. 11 is a schematic structural view of a stopper and a control mechanism in embodiment 2.

Reference numerals illustrate: 10. a base; 20. printing a mobile station; 30. a print head; 1. a printing seat; 11. a base; 111. a pulley; 12. installing a top frame; 121. a feeding guide seat; 13. a mounting base; 131. installing a main seat; 1311. a feed inlet; 1312. a second sliding chamber; 1313. a movable plate; 1314. a third elastic member; 1315. a through hole; 1316. a first cooling fan; 1317. a second cooling fan; 1318. an air guide pipe; 132. a movable auxiliary seat; 1321. a fixing plate; 14. a protective cover; 2. a power material conveying mechanism; 21. a drive roll; 22. driven roller; 23. a second drive assembly; 231. a driving shaft; 232. a driving motor; 233. a first drive gear; 234. a first driven gear; 235. a second drive gear; 236. a second driven gear; 24. a fluid passage; 25. a limit groove; 3. a printing mechanism; 31. a throat; 32. a nozzle; 33. a heating block; 34. a heat dissipation block; 4. a fixing mechanism; 41. a limit rod; 42. a mounting plate; 43. a second elastic member; 44. a third sliding protrusion; 45. unlocking plate; 46. ear plates; 5. an infusion assembly; 51. a cooling box; 52. a first liquid pipe; 53. a second liquid pipe; 54. a rotary joint; 55. a liquid pump; 6. a support main; 61. a column; 62. fixing the cross beam; 621. a mounting part; 622. a first chute; 623. positioning holes; 624. a first guiding inclined surface; 63. a movable cross beam; 64. reinforcing and supporting diagonal rods; 7. unreeling rack; 71. a mounting base plate; 711. a first sliding protrusion; 712. a deformation groove; 713. a positioning part; 714. positioning columns; 715. a second guiding inclined surface; 72. a connecting arm; 73. a reel is unreeled; 731. a first sliding chamber; 74. releasing the winding drum; 75. a limiting block; 751. a second sliding protrusion; 8. a control mechanism; 81. a driving rod; 82. a force application plate; 83. a first elastic member; 84. and a hinge rod.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-11.

The application discloses a 3D printer.

Example 1:

the embodiment discloses a 3D printer, including base 10, fixed connection in the support body frame 6 of base 10 up end and set up in the print head 30 of support body frame 6, base 10 is connected with along the longitudinal slip and is located the printing mobile station 20 of print head 30 below. The upper end surface of the base 10 is fixedly connected with a longitudinal guide rail for sliding connection of the printing mobile station 20, the base 10 is provided with a longitudinal driving mechanism, and the longitudinal driving mechanism drives the printing mobile station 20 in a belt transmission mode.

The support main 6 includes a pair of upright posts 61 fixedly connected to the upper end surface of the base 10, a fixed cross beam 62 fixedly connected to the top of the upright posts 61, and a movable cross beam 63 positioned between the fixed cross beam 62 and the printing moving table 20 and slidably connected to the upright posts 61 in the vertical direction, and the two upright posts 61 are respectively positioned at both sides of the printing moving table 20. The upright 61 is provided with a vertical driving mechanism, and the vertical driving mechanism drives the movable cross beam 63 to move in a screw transmission mode. A reinforcing support diagonal 64 is fixedly connected between the fixed cross member 62 and the base plate.

One side protrusion of fixed crossbeam 62 is provided with installation department 621, and first spout 622 has all been seted up along vertically to the both sides of installation department 621, and the one end of first spout 622 extends to installation department 621 lateral wall, and the other end of first spout 622 extends to fixed crossbeam 62 and does not run through the setting, and locating hole 623 has been seted up along vertical to the up end of installation department 621. The fixed cross beam 62 is detachably connected with an unreeling frame 7 for unreeling the coil material, the unreeling frame 7 is a plastic piece and has elasticity, and the unreeling frame 7 comprises a mounting bottom plate 71, a connecting arm 72 fixedly connected to the mounting bottom plate 71 and an unreeling shaft 73 fixedly connected to the connecting arm 72. The first sliding protrusions 711 which are connected to the first sliding grooves 622 in a sliding manner are fixedly protruding from both sides of the lower end face of the mounting base plate 71, two deformation grooves 712 are formed in one side of the mounting base plate 71 in the radial direction, a positioning portion 713 is formed between the two deformation grooves 712, and positioning columns 714 inserted into the positioning holes 623 are protruding from the lower end face of the positioning portion 713.

The side surface of the mounting portion 621 having the notch of the first chute 622 has a first guiding inclined surface 624 for the outer wall of the positioning post 714 to abut to force the positioning portion 713 to bend and deform upwards. When the unreeling frame 7 is installed, the first sliding protrusion 711 is aligned with the notch of the first sliding groove 622 on the installation part 621, so that the first sliding protrusion 711 slides into the first sliding groove 622, the installation bottom plate 71 is pushed horizontally, when the outer wall of the positioning column 714 is abutted to the first guiding inclined plane 624 in the sliding process of the installation bottom plate 71, the first guiding inclined plane 624 breaks down the horizontal acting force into vertical component force, one end of the positioning part 713 with the positioning column 714 is tilted upwards, the installation bottom plate 71 is pushed to slide continuously, when the positioning column 714 slides to the positioning hole 623, the positioning part 713 is reset elastically, and the positioning column 714 is forced to be embedded in the positioning hole 623.

In the state that the positioning post 714 is inserted into the positioning hole 623, a second guiding inclined plane 715 for abutting against the inner wall of the positioning hole 623 to force the positioning portion 713 to bend upwards is arranged on one side of the positioning post 714 close to the notch of the first sliding groove 622. When the unreeling frame 7 is disassembled, the mounting bottom plate 71 is applied with a force along the extending direction of the first sliding groove 622, the inner wall of the notch of the positioning hole 623, which is close to the first sliding groove 622, is abutted against the second guiding inclined surface 715 of the positioning post 714, the second guiding inclined surface 715 breaks down the horizontal force into a vertical component force, one end of the positioning part 713 with the positioning post 714 is tilted upwards, the mounting bottom plate 71 is pushed to slide continuously, the positioning post 714 slides and is separated from the positioning hole 623, and meanwhile, the mounting bottom plate 71 is pushed to slide the first sliding boss 711 and separate from the first sliding groove 622.

The unreeling shaft 73 is axially and longitudinally arranged, the unreeling shaft 73 is slidably sleeved with a unreeling drum 74, the material is wound on the unreeling drum 74, and the unreeling shaft 73 and the unreeling drum 74 rotate relatively. The unwinding shaft 73 is movably connected with a limiting block 75, and the unwinding shaft 73 is provided with a control mechanism 8 which drives the limiting block 75 to move and is abutted against the end face of the unwinding shaft 74. In this embodiment, the lower end of the limiting block 75 is hinged to the outer end surface of the unwinding shaft 73, and the control mechanism 8 includes a driving rod 81 slidably inserted into the unwinding shaft 73 along the axial direction, a force applying plate 82 fixedly connected to the driving rod 81 and located outside the unwinding shaft 73, and a first elastic member 83 fixedly connected between the force applying plate 82 and the unwinding shaft 73 to force the driving rod 81 to slide away from the limiting block 75 so that the limiting block 75 abuts against the end surface of the unwinding shaft 74. Specifically, the first elastic member 83 is a compression spring, one end of the first elastic member 83 is fixedly connected to the end surface of the unwinding shaft 73, and the other end of the first elastic member 83 is fixedly connected to the force application plate 82. The stopper 75 is slidably connected to a second slide 751 along a length direction thereof, and an end portion of the driving rod 81 is inserted into the unwinding shaft 73 and hinged to the second slide 751.

The printing head 30 comprises a printing seat 1, a power feeding mechanism 2 arranged on the printing seat 1 for conveying materials and a printing mechanism 3 arranged on the printing seat 1 for melting and printing the materials. The printing seat 1 comprises a base 11 which is connected with the movable cross beam 63 in a sliding way along the transverse direction, an installation top frame 12 which is fixedly connected with one side of the base 11, an installation seat 13 which is fixedly connected with the lower end surface of the installation top frame 12, and a protection cover 14 which is fixedly connected with the base 11 so as to cover the installation top frame 12 and the installation seat 13. The pulley 111 is connected with the rotation of the side of base 11 far away from the protective housing 14, and pulley 111 slides and walks on movable cross beam 63, and movable cross beam 63 is provided with transverse driving mechanism, and transverse driving mechanism adopts the belt drive mode to drive base 11 to remove. The installation roof rack 12 is fixedly connected with a feeding guide seat 121 which is positioned above the power feeding mechanism 2 and used for passing materials, and the protective housing 14 is provided with an avoiding groove for the feeding guide seat 121 to pass through.

The mounting seat 13 comprises a mounting main seat 131 and a movable auxiliary seat 132 which are fixedly connected to the lower end face of the mounting top frame 12, the mounting main seat 131 is provided with a mounting cavity, and one side of the mounting main seat 131 is provided with a charging operation port communicated with the mounting cavity. The lower part of the movable auxiliary seat 132 is hinged on the inner side wall of the charging operation opening through a hinge shaft to control the charging operation opening to be opened and closed, the movable auxiliary seat 132 is fixedly connected with a fixed plate 1321 extending into the mounting cavity in a protruding manner, and the protective housing 14 is correspondingly provided with an avoidance gap for the movable auxiliary seat 132 to turn over. The power feeding mechanism 2 includes a driving roller 21 rotatably connected to the mounting base 13, a driven roller 22 rotatably connected to the fixed plate 1321, and a driving assembly that drives the driving roller 21 and the driving roller 21 to rotate so as to feed the material, the driving roller 21 and the driven roller 22 being disposed in parallel. Limiting grooves 25 for the material strips to pass through are formed in the circumferential surfaces of the driving roller 21 and the driven roller 22 in a surrounding mode, and anti-slip ribs are arranged on the inner walls of the limiting grooves 25 in a protruding mode to reduce the possibility of slipping of the material.

The driving assembly comprises a driving shaft 231 rotatably connected to the mounting cavity, a driving motor 232 for driving the driving shaft 231 to rotate, a first driving gear 233 coaxially and fixedly sleeved on the driving shaft 231, a first driven gear 234 coaxially and fixedly sleeved on the driving roller 21 and externally meshed with the first driving gear 233, a second driving gear 235 coaxially and fixedly sleeved on the driving roller 21, and a second driven gear 236 coaxially and fixedly sleeved on the driven roller 22 and externally meshed with the second driving gear 235. Specifically, the driving motor 232 is a servo motor, the driving motor 232 is fixedly connected to the outer wall of the mounting main seat 131, and an output shaft of the driving motor 232 is fixedly connected to the driving shaft 231.

The top wall of the installation main seat 131 is provided with a feed inlet 1311 which is communicated with the installation cavity and the feed guide seat 121 for materials to pass through, the top wall of the installation main seat 131 is provided with a second sliding cavity 1312 which is communicated with the feed inlet 1311, and one side of the installation main seat 131, which is positioned at the charging operation port, is provided with a limiting hole which is communicated with the second sliding cavity 1312. The second sliding cavity 1312 is slidably connected with a movable plate 1313, a through hole 1315 for passing through a material is formed in the movable plate 1313, a pressure sensor is arranged on the inner peripheral wall of the through hole 1315, and when the pressure sensor reaches a certain pressure value, the driving motor 232 is in a power-off state. A third elastic member 1314 for forcing the movable plate 1313 to slide in a direction close to the limiting hole is disposed between the second sliding cavity 1312 and the movable plate 1313, specifically, the third elastic member 1314 is a compression spring, one end of the third elastic member 1314 is fixedly connected to an inner wall of the second sliding cavity 1312, and the other end of the third elastic member 1314 is fixedly connected to the movable plate 1313.

A fixing mechanism 4 is arranged between the movable auxiliary seat 132 and the mounting main seat 131 to realize that the free end of the movable auxiliary seat 132 is detachably connected with the mounting main seat 131, and the fixing mechanism 4 comprises a limit rod 41 which slides through the movable auxiliary seat 132, a mounting plate 42 which is fixedly connected with the limit rod 41 and is positioned outside the movable auxiliary seat 132, and a second elastic piece 43 which is fixedly connected between the movable auxiliary seat 132 and the mounting plate 42 to force the limit rod 41 to be inserted into the limit hole. The second elastic member 43 is an extension spring, one end of the second elastic member 43 is fixedly connected to the outer wall of the movable auxiliary seat 132, the other end of the second elastic member 43 is fixedly connected to the mounting plate 42, and the elastic force of the third elastic member 1314 is smaller than the elastic deformation force threshold of the second elastic member 43. The outer side wall fixedly connected with of movable auxiliary seat 132 is located the otic placode 46 of gag lever post 41 top, and movable auxiliary seat 132 is provided with unblock board 45, and unblock board 45 articulates in otic placode 46 through the articulated shaft, and mounting panel 42 slides along vertical and is connected with third smooth protruding 44, and the one end of unblock board 45 articulates in third smooth protruding 44, and the top of unblock board 45 is close to the top of movable auxiliary seat 132. After the limiting rod 41 is inserted into the limiting hole, the limiting rod 41 abuts against the side wall of the movable plate 1313 to force the movable plate 1313 to slide, so that the through hole 1315 of the movable plate 1313 and the feed inlet 1311 are in a right-facing state, and the compression spring is elastically deformed at the moment.

The driving roller 21 and the driven roller 22 are both provided with a fluid passage 24 for the coolant to pass through, and the protective housing 14 is provided with an infusion assembly 5 for delivering the coolant through the fluid passage 24. The infusion assembly 5 comprises a cooling box 51, a first liquid pipe 52 and a second liquid pipe 53 which are fixedly connected to the upper end face of the protective housing 14 for storing cooling liquid, two ends of the driving roller 21 and the driven roller 22 are respectively and rotatably connected with a rotary joint 54, and two first liquid pipes 52 and two second liquid pipes 53 are respectively arranged. The driving roller 21 and the driven roller 22 have the same structure, and in this embodiment, taking the driven roller 22 as an example, one end of the first liquid pipe 52 is connected to the cooling tank 51 and the other end is connected to one of the rotary joints 54 of the driven roller 22, and one end of the second liquid pipe 53 is connected to the cooling tank 51 and the other end is connected to the other rotary joint 54 of the driven roller 22. The first liquid pipe 52 is provided with a liquid pump 55 for pumping the cooling tank 51 into the liquid flow passage 24, the first liquid pipe 52 and the second liquid pipe 53 connected to the driving roller 21 are hard pipes, and the first liquid pipe 52 and the second liquid pipe 53 connected to the driven roller 22 are bellows type flexible pipes.

The printing mechanism 3 comprises a throat 31 fixedly connected to the mounting cavity, a nozzle 32 fixedly connected to the lower part of the throat 31 and exposed out of the protective housing 14, and a heating block 33 fixedly sleeved on the throat 31 to heat the throat 31. The axis of the throat 31 is vertically arranged, the throat 31 is located under the limiting groove 25, a heat insulation sleeve (not shown in the figure) is coaxially and fixedly sleeved on the throat 31, a heat dissipation block 34 located below the heat insulation sleeve is fixedly sleeved on the middle of the throat 31, and the heating block 33 and the heat dissipation block 34 are located below the installation main seat 131. The outer wall fixedly connected with of installation main seat 131 carries out the first cooling fan 1316 of blowing heat dissipation to the installation chamber, and the lateral wall fixedly connected with second cooling fan 1317 of installation main seat 131, and the air outlet of second cooling fan 1317 is connected with guide duct 1318, and the air outlet of guide duct 1318 aims at nozzle 32.

The implementation principle of the embodiment is as follows: a first cooling fan 1316 is additionally arranged to blow off the heat emitted by the throat 31, so that the heat accumulation in the installation cavity is reduced, and the possibility of blockage caused by heating and melting of materials at the driving roller 21 and the driven roller 22 is reduced; the cooling liquid of the cooling box 51 enters the liquid flowing channel 24 of the driving roller 21 and the driven roller 22 through the first liquid pipe 52, so that the driving roller 21 and the driven roller 22 are cooled, the possibility that materials adhere to the outer surfaces of the driving roller 21 and the driven roller 22 due to heating is effectively reduced, the possibility that materials are heated and melted at the driving roller 21 and the driven roller 22 to cause blocking is effectively reduced, and the cooling liquid after absorbing heat is discharged to the cooling box 51 through the second liquid pipe 53 for repeated circulation.

When the unwinding roll 74 is replaced, the force application plate 82 is pressed to enable the driving rod 81 to slide towards the direction close to the limiting block 75, the free end of the limiting block 75 rotates around the hinge point to a position which is not interfered with the sliding track of the unwinding roll 74, at the moment, the first elastic piece 83 is elastically deformed and has elastic potential energy, the used unwinding roll 74 is taken out, after the unwinding roll 74 with the wire coil material is placed, the acting force on the force application plate 82 is removed, the driving rod 81 is forced to slide towards the direction far away from the limiting block 75 by the first elastic piece 83, and accordingly the limiting block 75 is driven to rotate and reset to be abutted to the end face of the unwinding roll 74, and accordingly the unwinding roll 74 is effectively prevented from reversely sliding to be separated from the unwinding roll 73.

When the material is charged, the material sequentially passes through the feeding guide seat 121, the feeding hole 1311 and the through hole 1315 of the movable plate 1313, after the limiting rod 41 slides and is separated from the limiting hole, the third elastic piece 1314 elastically resets to force the movable plate 1313 to slide, so that the movable plate 1313 applies a certain clamping force to the material, at the moment, the pressure sensor arranged in the through hole 1315 senses the acting force, so that the driving motor 232 is in a power-off state, the operation safety is improved, a worker needs to apply the acting force to the material to pull the material to extend downwards, after the lower end of the material passes through the limiting groove 25 and the upper inner hole of the throat 31, the free end of the movable auxiliary seat 132 is turned over, and after the limiting rod 41 is inserted into the limiting hole, the limiting rod 41 is abutted against the movable plate 1313, so that the through hole 1315 of the movable plate 1313 and the feeding hole 1311 are in a positive state, at the moment, the pressure sensor does not sense the acting force, the driving motor 232 is in an electrified state, and the printing head 30 can work normally.

Example 2: unlike embodiment 1, the unwinding shaft 73 is hollow, the sidewall of the unwinding shaft 73 is provided with a first sliding cavity 731 in the radial direction, the stopper 75 is slidably connected to the first sliding cavity 731, the control mechanism 8 includes a driving rod 81 slidably inserted into the unwinding shaft 73 along the axial direction, a hinge rod 84 with one end hinged to the driving rod 81 and the other end hinged to the stopper 75, a force applying plate 82 fixedly connected to the driving rod 81 and located outside the unwinding shaft 73, and a first elastic member 83 fixedly connected between the force applying plate 82 and the unwinding shaft 73 to force the stopper 75 to retract inside the first sliding cavity 731. Specifically, the first elastic member 83 is an extension spring, one end of the first elastic member 83 is fixedly connected to the end surface of the unwinding shaft 73, and the other end of the first elastic member 83 is fixedly connected to the force application plate 82.

The implementation principle of the embodiment is as follows: when the unwinding reel 74 is replaced, the force application plate 82 is applied with a force in a direction away from the driving rod 81, so that the driving rod 81 slides in a direction away from the limiting block 75, the limiting block 75 is driven by the hinging rod 84 to slide and retract in the first sliding cavity 731, at the moment, the first elastic piece 83 is elastically deformed and has elastic potential energy, the used unwinding reel 74 is taken out, after the unwinding reel 74 with the coil material is placed, the force applied to the force application plate 82 is removed, the driving rod 81 is forced by the first elastic piece 83 to slide and reset, and the limiting block 75 is driven to slide and reset to abut against the end face of the unwinding reel 74, so that the unwinding reel 74 is effectively prevented from reversely sliding and separating from the unwinding reel 73.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (5)

1. A 3D printer, characterized in that: including base (10), fixed connection in the support body frame (6) of base (10) and set up in print head (30) of supporting body frame (6), base (10) are connected with along vertical sliding and are located print mobile station (20) of print head (30) below, support body frame (6) are including fixed connection in stand (61) of base (10), fixed beam (62) of fixed connection in stand (61) top and along vertical sliding connection in movable beam (63) of stand (61), print head (30) are connected in movable beam (63) along horizontal sliding, fixed beam (62) can dismantle be connected with unreel frame (7) of unreeling the coil stock, and fixed beam (62) protrusion is provided with installation department (621), and first spout (622) have been seted up along vertical to one side of installation department (621), unreel frame (7) are including mounting plate (71), and mounting plate (71) protrusion is provided with first smooth protruding (622) of sliding connection in first spout (622), mounting plate (71) have and are in the location portion (713) that are provided with elasticity setting up along vertical locating hole (623), a positioning column (714) inserted into the positioning hole (623) is convexly arranged on the lower end surface of the positioning part (713); the side surface of the notch of the first chute (622) of the mounting part (621) is provided with a first guide inclined surface (624) for the outer wall of the positioning column (714) to be abutted so as to force the positioning part (713) to bend and deform upwards; the positioning column (714) is inserted into the positioning hole (623), and one side of the positioning column (714) close to the notch of the first chute (622) is provided with a second guide inclined plane (715) for abutting the inner wall of the positioning hole (623) to force the positioning part (713) to bend and deform upwards; the printing head (30) comprises a printing seat (1), a power feeding mechanism (2) arranged on the printing seat (1) for feeding materials and a printing mechanism (3) arranged on the printing seat (1) for melting and printing the materials; the printing seat (1) comprises a base (11) connected to the movable cross beam (63) in a sliding manner and a mounting seat (13) arranged on the base (11), the mounting seat (13) comprises a mounting main seat (131) fixedly connected to the base (11) and a movable auxiliary seat (22) hinged to the mounting main seat (131), the mounting main seat (131) is provided with a mounting cavity, the top of the mounting main seat (131) is provided with a feeding hole (1311) communicated with the mounting cavity for materials to pass through, one side of the mounting main seat (131) is provided with a charging operation hole communicated with the mounting cavity, the lower part of the movable auxiliary seat (132) is hinged to the inner side wall of the charging operation hole through a hinge shaft to control the opening and closing of the charging operation hole, the power feeding mechanism (2) comprises a driving roller (21) rotatably connected to the mounting main seat (131) and a driven roller (22) rotatably connected to the movable auxiliary seat (132), materials pass through the space between the driving roller (21) and the driven roller (22), and a fixing mechanism (4) is arranged between the movable auxiliary seat (132) and the mounting main seat (131) to realize the detachable connection of the movable auxiliary seat (132); the mounting main seat (131) is provided with a limiting hole, the fixing mechanism (4) comprises a limiting rod (41) which slides and penetrates through the movable auxiliary seat (132), a mounting plate (42) which is fixedly connected with the limiting rod (41) and is positioned outside the movable auxiliary seat (132), and a second elastic piece (43) which is fixedly connected between the movable auxiliary seat (132) and the mounting plate (42) so as to force the limiting rod (41) to be inserted into the limiting hole; the top wall of the installation main seat (131) is provided with a second sliding cavity (1312) communicated with the feeding hole (1311), the second sliding cavity (1312) is communicated with a limiting hole, the installation main seat (131) is provided with a movable plate (1313) connected with the second sliding cavity (1312) in a sliding mode, the movable plate (1313) is provided with a through hole (1315) for materials to pass through, a third elastic piece (1314) is arranged between the inner wall of the second sliding cavity (1312) and the movable plate (1313), after the limiting rod (41) is inserted into the limiting hole, the limiting rod (41) abuts against the side wall of the movable plate (1313) to force the movable plate (1313) to slide so that the through hole (1315) of the movable plate (1313) and the feeding hole (1311) are in a dead-facing state, and at the moment, the third elastic piece (1314) is elastically deformed, and the elastic force of the third elastic piece (1314) is smaller than the elastic threshold of the second elastic piece (43).

2. A 3D printer according to claim 1, wherein: unreeling frame (7) still include fixed connection in linking arm (72) of mounting plate (71) and fixed connection in unreeling axle (73) of linking arm (72), unreel axle (73) slip cover is equipped with unreels reel (74), and the material is rolled up in unreeling reel (74), unreel axle (73) and unreel reel (74) relative rotation, unreel axle (73) swing joint has stopper (75), unreel axle (73) are provided with control mechanism (8) that drive stopper (75) remove and butt in unreel reel (74) terminal surface.

3. A 3D printer according to claim 2, wherein: one end of stopper (75) articulates in the outer terminal surface of unreeling axle (73), control mechanism (8) including insert driving lever (81) that locates unreeling axle (73) along the axial slip, fixed connection is in driving lever (81) and be located unreeling axle (73) outside application of force board (82) and fixed connection are in order to force driving lever (81) to keep away from stopper (75) direction and slide so that stopper (75) butt in first elastic component (83) of unreeling axle (74) terminal surface between unreeling axle (73), stopper (75) slide and are connected with second smooth protruding (751), driving lever (81) wear to locate unreeling axle (73) and articulate in second smooth protruding (751).

4. A 3D printer according to claim 2, wherein: the utility model discloses a spool (73) is the cavity setting, the lateral wall of spool (73) has seted up along radial intercommunication in first chamber (731) that slides of unreeling axle (73) inner chamber, stopper (75) slide and connect in first chamber (731) that slides, control mechanism (8) including insert driving lever (81) that locate spool (73) along the axial slide, one end articulates in driving lever (81) and the articulated pole (84) of other end in stopper (75), fixed connection is in driving lever (81) and be located the outside application of force board (82) of spool (73) and fixed connection are in between application of force board (82) and spool (73) in order to force stopper (75) indent in first elastic component (83) of chamber (731) that slides.

5. A 3D printer according to claim 1, wherein: the installation main seat (131) is provided with a driving motor (232) for driving the driving roller (21) to rotate, the inner wall of a through hole (1315) of the movable plate (1313) is provided with a pressure sensor, the driving motor (232) is powered on or powered off through the pressure sensor, and when the pressure value applied to the pressure sensor reaches a set value, the driving motor (232) is in a power-off state.