CN215473100U - 3D prints and uses extrusion mechanism - Google Patents

Abstract

The utility model discloses an extrusion mechanism for 3D printing, which comprises a motor, a base, a driving extrusion wheel, a driven extrusion wheel and a handle, wherein the base is fixed on the output end head of the motor through a bolt; the upper part and the lower part of the outer wall of the driving extrusion wheel are coaxially provided with a first extrusion groove and a first contra-open gear part respectively, the upper part and the lower part of the outer wall of the driven extrusion wheel are coaxially provided with a second extrusion groove and a second contra-open gear part respectively, the first contra-open gear part and the second contra-open gear part are in contra-open meshing, and the outer walls of the first extrusion groove and the second extrusion groove are provided with teeth. According to the extrusion mechanism for 3D printing, the two sides of the double-tooth extrusion wheel are simultaneously conveyed, so that the anti-skid capacity is high, the output material is more stable, and meanwhile, the consumable filaments are convenient to replace by adopting a handle pressing mode.

Description

3D prints and uses extrusion mechanism

Technical Field

The utility model relates to the technical field of accessories of 3D printers, in particular to an extrusion mechanism for 3D printing.

Background

The extruder is a consumable extrusion device commonly used in 3D printer equipment, and in a broad sense, the 3D printer extruder extrudes materials into a shape required by the FDM3D printer, and is responsible for conveying and heating the materials. In a narrow sense, the extruder is responsible for delivering the material to the heater chip and out the nozzle.

At present, most of the existing extrusion mechanisms for conveying materials transmit consumable materials through a straight gear and a grooved bearing wheel. The extrusion gear and the groove bearing wheel are clamped tightly, and the stepping motor drives the extrusion gear to rotate so as to drive the consumable filaments to be conveyed to the hot end. Therefore, one side is that the gear is spur gear and consumptive material area of contact is less partially, and one side is the groove bearing wheel, and the surface is smooth, non-skid. Simultaneously, current extrusion mechanism mostly uses the pressure measurement structure to compress tightly driven bearing wheel, and it is inconvenient to change consumptive material filament.

Therefore, it is necessary to develop an extrusion mechanism for 3D printing in view of the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an extrusion mechanism for 3D printing, which has the advantages that two sides of an extrusion wheel with double teeth are simultaneously conveyed, the anti-skidding capacity is high, the output material is more stable, and meanwhile, a handle pressing mode is adopted, so that consumable filaments are convenient to replace.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model relates to an extrusion mechanism for 3D printing, which comprises a motor, a machine base, a driving extrusion wheel, a driven extrusion wheel and a handle, wherein the machine base is fixed on the output end head of the motor through a bolt; the initiative is extruded and is taken turns outer wall upper and lower coaxial first groove and the first contra-open gear portion of extruding of setting up respectively, the driven outer wall of extruding takes turns outer wall upper and lower coaxial second that sets up respectively is extruded groove and the second contra-open gear portion, the gear parameter of first contra-open gear portion and the second contra-open gear portion is the same and can be to the contra-open meshing, the outer wall that the groove was extruded to first extrusion groove and second is provided with tooth and the consumptive material filament of carrying through needs between the two.

Furthermore, the base is a first base, the top of the first base is open, the handle is a first handle, a pin shaft hole is formed in the head of the first handle, a sleeve is installed in the pin shaft hole, and the sleeve is installed in a threaded bottom hole of the motor after penetrating through the first base through hole through a first bolt.

Furthermore, the compressing structure comprises a third bolt, a first pressure spring and a fourth bolt, the third bolt is in threaded connection with the inner side of the tail of the first handle, the fourth bolt is in threaded connection with the threaded hole of the upright rib at the top of the first machine base, the first pressure spring is compressed between the tail of the first handle and the upright rib, and two ends of the first pressure spring are respectively sleeved on the bolt head of the third bolt and the screwing-out end head of the fourth bolt.

Furthermore, the compressing structure further comprises a spring locking sleeve, the large end of the spring locking sleeve is attached to the edge of one end of the first pressure spring, the small end of the spring locking sleeve stretches into the middle hole of the first pressure spring, a blind hole is formed in the large end of the spring locking sleeve, and the fourth bolt head is screwed into the blind hole.

Further, the driven extrusion wheel is mounted on a mounting plate extending out of the working end of the first handle through a bearing and a second bolt; the driving extrusion wheel is sleeved on the motor shaft and locked at the bilaterally symmetrical positions by using the side wall of the jackscrew.

Furthermore, a feed inlet is formed in the first handle, the inner end of the feed inlet faces the arc holes formed in the first extrusion groove and the second extrusion groove, and a quick connector for guiding is arranged on the first base in the flowing direction of the consumable filaments.

Further, the base comprises a second base and a base cover, and the base cover and the second base are mounted on the top of the motor through a plurality of fifth bolts in an overlapped mode; the handle is a second handle, and the inner end of the second handle is pivoted between the base cover and the second base through a second pin shaft.

Furthermore, the compressing structure comprises an adjusting screw and a second pressure spring, a long through hole penetrating through the adjusting screw is formed in the tail of the second handle, a handle threaded hole is formed in the position, corresponding to the long through hole, of the machine base cover, the end part of the adjusting screw is screwed into the handle threaded hole, and the second pressure spring is compressed between the nut of the adjusting screw and the outer side wall of the second handle.

Furthermore, two mounting arms extend inwards from the inner side wall of the middle of the second handle, a vertical shaft is vertically connected with the two mounting arms in a penetrating mode, and the vertical shaft is provided with the driven extrusion wheel through two discs of bearings.

The motor further comprises a driving gear and a large gear, wherein the driving gear is coaxially arranged on the motor shaft, the driving gear drives the large gear to rotate, and the large gear drives the driving extrusion wheel to rotate; and the mounting shaft of the driving extrusion wheel is mounted between the machine seat cover and the second machine seat through bearings at two ends.

Compared with the prior art, the utility model has the beneficial technical effects that:

the extrusion mechanism for 3D printing has the beneficial effects that:

according to the extrusion mechanism for 3D printing, the second split gear part is arranged on the lower part of the outer wall of the driven extrusion wheel, and can be meshed with the first split gear part to rotate in the synchronous direction to convey consumable filaments together; through the first tooth that extrudes the inslot and set up whole circle of extrusion groove and second, can carry two sides while frictional contact of consumptive material filament, increased forward propelling movement power, avoided the output failure trouble that skids. Through the handle afterbody the compact structure effect, the driven wheel of extruding of handle work end is by extruding the wheel to the initiative, forms the clamp force between the two, the operation the handle tail end is overcome the clamp force for first counter-opening gear portion and second counter-opening gear portion break away from, and the groove is opened to first extrusion groove and second extrusion groove simultaneously, is convenient for change consumptive material filament, simple operation. According to the extrusion mechanism for 3D printing, the two sides of the double-tooth extrusion wheel are simultaneously conveyed, so that the anti-skid capacity is high, the output material is more stable, and meanwhile, the consumable filaments are convenient to replace by adopting a handle pressing mode. In addition, through the first machine seat with an open top, transmission among all parts and the conveying condition of consumable filaments can be observed conveniently, and repair and maintenance are facilitated. Through the first pressure spring both ends of third bolt, fourth bolt and spring lock sleeve location, avoid first pressure spring to pop out when using, can play spacing and the effect of adjusting the elasticity size simultaneously, avoid excessively extrudeing first pressure spring and arouse the plastic deformation of spring, and also can strengthen crowded material effect. The driving extrusion wheel is directly and coaxially sleeved on the motor shaft, the structure is simple and compact, the transmission chain parts are few, the maintenance and the overhaul are convenient, and the driving extrusion wheel is suitable for working occasions with small conveying resistance. Meanwhile, the double-jackscrew symmetric jacking mode is used, so that the good coaxiality of the driving extrusion wheel and the motor shaft is ensured. Through directly seting up the feed inlet on first handle, the structure is compacter, and the transport route of consumptive material filament is shorter, has reduced and has carried the resistance.

Through the arrangement of the split second base and the base cover, the internal rotating part can be covered and protected, dust or sundries are prevented from falling in, and the precise operation of the moving part is ensured; meanwhile, the second handle is arranged in a side wall compression mode, and protection can be formed on one side. Through adjusting screw and second pressure spring constitution compact structure changes the degree of depth in the adjusting screw in handle screw hole, can adjust the driven pretightning force of extruding the wheel pressure to the initiative wheel of extruding, and the tooth that the groove was extruded to the first groove of extruding and the second of being convenient for control is to the occlusal force of consumptive material filament, improves and carries the effect. The driving gear and the large gear form a speed reduction transmission structure, so that the output torque of the driving extrusion wheel can be increased, and the automatic material conveying device is suitable for working occasions requiring large pushing force to convey consumable filaments.

Drawings

The utility model is further illustrated in the following description with reference to the drawings.

Fig. 1 is an exploded view of an extrusion mechanism for 3D printing according to the present invention in example 1;

fig. 2 is a schematic perspective view of the extrusion mechanism for 3D printing according to the present invention in embodiment 1;

fig. 3 is a schematic perspective view of another angle of the extrusion mechanism for 3D printing according to the present invention in embodiment 1;

fig. 4 is an exploded view of the extrusion mechanism for 3D printing according to the present invention in example 2;

fig. 5 is a schematic perspective view of the extrusion mechanism for 3D printing according to embodiment 2 of the present invention;

fig. 6 is a schematic perspective view of another angle of the extrusion mechanism for 3D printing according to the present invention in embodiment 2.

Description of reference numerals: 1. a motor; 101. a motor shaft; 2. a first base; 3. a driving extrusion wheel; 301. carrying out top thread; 302. a first extrusion groove; 303. a first contra-aperture gear section; 304. installing a shaft; 4. a driven extrusion wheel; 401. a second extrusion groove; 402. a second split gear section; 403. a bearing; 5. a first handle; 501. a feed inlet; 6. a sleeve; 7. a first bolt; 8. a second bolt; 9. a third bolt; 10. a first pressure spring; 1001. a spring locking sleeve; 11. a fourth bolt; 12. a quick connector; 13. a second frame; 14. a base cover; 141. a handle threaded hole; 15. a driving gear; 16. a bull gear; 17. a second handle; 171. a second pin shaft; 18. adjusting the screw; 19. a second pressure spring; 20. a fifth bolt; 21. consumable filaments.

Detailed Description

The core of the utility model is to provide the extruding mechanism for 3D printing, which has strong anti-skid capability and more stable material output by simultaneously conveying two sides of the double-tooth extruding wheel, and is convenient for replacing consumable filaments by adopting a handle pressing mode.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to the drawings, fig. 1 is a schematic diagram of an explosion structure of an extrusion mechanism for 3D printing according to the present invention in embodiment 1; fig. 2 is a schematic perspective view of the extrusion mechanism for 3D printing according to the present invention in embodiment 1; fig. 3 is a schematic perspective view of another angle of the extrusion mechanism for 3D printing according to the present invention in embodiment 1; fig. 4 is an exploded view of the extrusion mechanism for 3D printing according to the present invention in example 2; fig. 5 is a schematic perspective view of the extrusion mechanism for 3D printing according to embodiment 2 of the present invention; fig. 6 is a schematic perspective view of another angle of the extrusion mechanism for 3D printing according to the present invention in embodiment 2.

In embodiment 1, as shown in fig. 1 to 3, the extrusion mechanism for 3D printing according to the present invention includes a motor 1, a base, a driving extrusion wheel 3, a driven extrusion wheel 4, and a handle. Motor 1 adopts step motor, the frame passes through the bolt fastening on motor 1's output end, the handle passes through the round pin axle pin joint to on the frame, motor 1's motor shaft 101 drive initiative extrusion wheel 3 is rotatory, and driven extrusion wheel 4 passes through the rotatable connection of bearing 403 at the work end of handle, and initiative extrusion wheel 3 and driven extrusion wheel 4 axis parallel arrangement and tip parallel and level. The tail end of the handle is connected to the machine base through a pressing structure, and the driven extrusion wheel 4 is leaned against the driving extrusion wheel 3 under the action of the pressing structure. The outer wall of the driving extrusion wheel 3 is coaxially provided with a first extrusion groove 302 and a first opposite-opening gear part 303 from top to bottom, the outer wall of the driven extrusion wheel 4 is coaxially provided with a second extrusion groove 401 and a second opposite-opening gear part 402 from top to bottom, the first opposite-opening gear part 303 and the second opposite-opening gear part 402 have the same gear parameters and can be meshed in an opposite-opening mode, the outer walls of the first extrusion groove 302 and the second extrusion groove 401 are provided with a whole circle of teeth, and consumable filaments 21 needing to be conveyed pass between the first extrusion groove 302 and the second extrusion groove 401. The cross sections of the first extrusion groove 302 and the second extrusion groove 401 are both in the shape of circular arc grooves.

The second split gear part 402 is arranged at the lower part of the outer wall of the driven extrusion wheel 4, and can be meshed with the first split gear part 303 to rotate in the synchronous direction to jointly convey the consumable filaments 21; through arranging a complete circle of teeth in the first extrusion groove 302 and the second extrusion groove 401, friction contact can be simultaneously carried out on two sides of the filament 21 of the conveyed consumable, forward pushing force is increased, and slipping output failure faults are avoided. Through the handle afterbody the compact structure effect, the driven extrusion wheel 4 of handle work end leans on to initiatively extrude wheel 3, forms the clamp force between the two, operates the handle tail end is overcome the clamp force for first counter-opening gear portion 303 and second counter-opening gear portion 402 break away from, and first extrusion groove 302 and second extrusion groove 401 are opened simultaneously, are convenient for change consumptive material filament 21, simple operation. According to the extrusion mechanism for 3D printing, the two sides of the double-tooth extrusion wheel are simultaneously conveyed, so that the anti-skid capacity is high, the output material is more stable, and meanwhile, the consumable filament 21 is convenient to replace by adopting a handle pressing mode.

In a specific implementation manner of this embodiment, as shown in fig. 1, the base is a first base 2, the top of the first base 2 is open, that is, a top cover is not provided, the handle is a first handle 5, a pin hole is provided at a head of the first handle 5, a sleeve 6 is installed in the pin hole, and the sleeve 6 is installed in a threaded bottom hole of the motor 1 after passing through a through hole of the first base 2 by a first bolt 7.

Through the first frame 2 setting of open-top formula, be convenient for observe the transmission between each part, the transport condition of consumptive material filament 21 is convenient for repair and maintenance.

In a specific embodiment of this embodiment, as shown in fig. 1 to 3, the compressing structure includes a third bolt 9, a first pressure spring 10 and a fourth bolt 11, the third bolt 9 is screwed inside the tail portion of the first handle 5, the fourth bolt 11 is screwed in the installation stud threaded hole at the top of the first base 2, the first pressure spring 10 is compressed between the tail portion of the first handle 5 and the installation stud, and two ends of the first pressure spring are respectively sleeved on the bolt head of the third bolt 9 and the screwing-out end of the fourth bolt 11.

Specifically, as shown in fig. 2 and fig. 3, the pressing structure further includes a spring locking sleeve 1001, a large end of the spring locking sleeve 1001 is close to an edge of one end of the first pressure spring 10, a small end of the spring locking sleeve extends into the middle hole of the first pressure spring 10, a blind hole is formed in the large end of the spring locking sleeve 1001, and the head of the fourth bolt 11 is screwed into the blind hole.

Through rotatory fourth bolt 11 for the spring locking cover is backward pressed, and first pressure spring 10 contracts, and spring force increases, and on the elasticity direction horizontal directional first handle 5 afterbody and the 2 top installation studs of first frame respectively, make the first circular arc hole of extruding between groove 401 two teeth of groove 302 and second diminish, extrude the frictional force increase, and it is better to extrude the material effect.

Through the first pressure spring 10 both ends of third bolt 9, spring lock sleeve 1001 and fourth bolt 11 location, avoid first pressure spring 10 to pop out when using, can play spacing and the big or small effect of regulation elasticity simultaneously, avoid excessively extrudeing first pressure spring 10 and arouse the plastic deformation of spring, and the crowded material effect of reinforcing.

In a specific embodiment of this embodiment, as shown in fig. 1 to 3, the driven extrusion wheel 4 is mounted to a mounting plate protruding from the working end of the first handle 5 through a bearing 403 and a second bolt 8. The driving extrusion wheel 3 is sleeved on the motor shaft 101 and locked at the lateral walls at the left and right symmetrical positions by using two jackscrews 301, and the motor shaft 101 is milled flat for convenient locking. The good coaxiality of the driving extrusion wheel 3 and the motor shaft 101 is ensured.

The driving extrusion wheel 3 is directly and coaxially sleeved on the motor shaft 101, so that the structure is simple and compact, the number of transmission chain parts is small, the maintenance and the overhaul are convenient, and the driving extrusion wheel is suitable for working occasions with small conveying resistance. Meanwhile, the mode of symmetrical jacking of double jackscrews is used, so that the good coaxiality of the driving extrusion wheel 3 and the motor shaft 101 is ensured.

Specifically, as shown in fig. 1 to 3, a feed inlet 501 is disposed on the first handle 5, the inner end of the feed inlet 501 faces the arc holes formed in the first extrusion groove 302 and the second extrusion groove 401, and the first chassis 2 is provided with a quick connector 12 for guiding in the flowing direction of the consumable filament 21.

By directly arranging the feeding hole 501 on the first handle 5, the structure is more compact, the conveying path of the consumable filaments 21 is shorter, and the conveying resistance is reduced.

In this embodiment, when the extrusion mechanism for 3D printing according to the present invention works, the motor 1 is powered on and then rotates to drive the driving extrusion wheel 3 connected thereto to rotate, so that the second split gear portion 402 engaged with the first split gear portion 303 also rotates, that is, the driving extrusion wheel 3 and the driven extrusion wheel 4 rotate in opposite directions synchronously. Meanwhile, after the first split gear part 303 and the second split gear part 402 are meshed, an approximately circular channel is formed between the first extrusion slot 302 and the second extrusion slot 401; the back is got into from feed inlet 501 to the consumptive material filament 21 of bar form, and this is approximate circular shape the passageway, because two extrusion wheels are meshed constantly rotates after obtaining power, rely on the frictional force and the occlusal force of tooth, the consumptive material filament 21 of bar form is through this is approximate circular shape during the passageway, obtain forward extrusion thrust to make the consumptive material filament 21 of bar form constantly extrude from defeated material mouthful quick-operation joint 12 department. When the consumable filament 21 is replaced, the tail end of the first handle 5 is pressed inwards, the first split gear part 303 and the second split gear part 402 are disengaged, the first extrusion groove 302 and the second extrusion groove 401 are separated, and the consumable filament 21 is released to facilitate replacement.

Embodiment 2, as shown in fig. 4 to 6, the present embodiment is formed by improving the structural form of the base and the handle on the basis of the embodiment 1. The base comprises a second base 13 and a base cover 14, and the base cover 14 and the second base 13 are mounted on the top of the motor 1 by a plurality of fifth bolts 20 in an overlapping manner. The handle is a second handle 17, and the inner end of the second handle 17 is pivoted between the base cover 14 and the second base 13 through a second pin 171.

Specifically, as shown in fig. 4 to 6, the pressing structure includes an adjusting screw 18 and a second pressing spring 19, a long through hole penetrating through the adjusting screw 18 is formed at the tail of the second handle 17, a handle threaded hole 141 is formed at a position of the base cover 14 corresponding to the long through hole, an end of the adjusting screw 18 is screwed into the handle threaded hole 141, and the second pressing spring 19 is pressed between a nut of the adjusting screw 18 and an outer side wall of the second handle 17.

Specifically, as shown in fig. 4 to 6, two mounting arms protrude inwards from the inner side wall of the middle part of the second handle 17, a vertical shaft is vertically connected to the two mounting arms in a penetrating manner, and the driven extrusion wheel 4 is mounted on the vertical shaft through two disc bearings 403.

Through the arrangement of the split second base 13 and the base cover 14, internal rotating parts can be covered and protected, dust or sundries are prevented from falling in, and the precise operation of moving parts is ensured; meanwhile, the second handle 17 is provided in a side wall compression form, which can form a shield on one side. Through the compaction structure that adjusting screw 18 and second pressure spring 19 constitute, change the degree of depth that adjusting screw 18 screwed in handle screw hole 141, can adjust the pretightning force that driven extrusion wheel 4 pressed to initiative extrusion wheel 3, be convenient for control first extrusion groove 302 and second extrusion groove 401 tooth to the bite-in force of consumptive material filament 21, improve the transport effect.

Specifically, the extrusion mechanism for 3D printing further comprises a driving gear 15 and a large gear 16, wherein the driving gear 15 is coaxially mounted on the motor shaft 101, the driving gear 15 drives the large gear 16 to rotate, and the large gear 16 drives the driving extrusion wheel 3 to rotate. The mounting shaft 304 of the driving extrusion wheel 3 is mounted between the housing cover 14 and the second housing 13 through bearings at both ends.

The driving gear 15 and the large gear 16 form a speed reduction transmission structure, so that the output torque of the driving extrusion wheel 3 can be increased, and the device is suitable for working occasions requiring large pushing force to convey consumable filaments 21.

In this embodiment, the working principle of the extrusion mechanism for 3D printing of the present invention is as follows: through the cooperation setting of frame lid 14 and second frame 13, can effectively protect the drive mechanism of inside, avoid getting into dust and debris. Through the arrangement of the speed reduction transmission structure, the output torque is increased, and the conveying capacity is improved. When the consumable filament 21 is replaced, the tail end of the second handle 17 is pulled outwards, the first extrusion groove 302 and the second extrusion groove 401 are separated from the extrusion of the consumable filament 21, and the replacement is convenient.

According to the extrusion mechanism for 3D printing, the second split gear part 402 is arranged at the lower part of the outer wall of the driven extrusion wheel 4, and can be meshed with the first split gear part 303 to rotate in the synchronous direction to convey consumable filaments 21 together; through arranging a complete circle of teeth in the first extrusion groove 302 and the second extrusion groove 401, friction contact can be simultaneously carried out on two sides of the filament 21 of the conveyed consumable, forward pushing force is increased, and slipping output failure faults are avoided. Through the handle afterbody the compact structure effect, the driven extrusion wheel 4 of handle work end leans on to initiatively extrude wheel 3, forms the clamp force between the two, operates the handle tail end is overcome the clamp force for first counter-opening gear portion 303 and second counter-opening gear portion 402 break away from, and first extrusion groove 302 and second extrusion groove 401 are opened simultaneously, are convenient for change consumptive material filament 21, simple operation. According to the extrusion mechanism for 3D printing, the two sides of the double-tooth extrusion wheel are simultaneously conveyed, so that the anti-skid capacity is high, the output material is more stable, and meanwhile, the consumable filament 21 is convenient to replace by adopting a handle pressing mode. In addition, through the first frame 2 with an open top, transmission among all parts and the conveying condition of the consumable filaments 21 are convenient to observe, and repair and maintenance are convenient. The two ends of the first pressure spring 10 are positioned through the third bolt 9 and the fourth bolt 11, so that the first pressure spring 10 is prevented from popping up when in use, a limiting effect can be achieved, and the plastic deformation of the spring caused by excessive extrusion of the first pressure spring 10 is avoided. The driving extrusion wheel 3 is directly and coaxially sleeved on the motor shaft 101, so that the structure is simple and compact, the number of transmission chain parts is small, the maintenance and the overhaul are convenient, and the driving extrusion wheel is suitable for working occasions with small conveying resistance. Meanwhile, the mode of symmetrical jacking of double jackscrews is used, so that the good coaxiality of the driving extrusion wheel 3 and the motor shaft 101 is ensured. By directly arranging the feeding hole 501 on the first handle 5, the structure is more compact, the conveying path of the consumable filaments 21 is shorter, and the conveying resistance is reduced.

Through the arrangement of the split second base 13 and the base cover 14, internal rotating parts can be covered and protected, dust or sundries are prevented from falling in, and the precise operation of moving parts is ensured; meanwhile, the second handle 17 is provided in a side wall compression form, which can form a shield on one side. Through the compaction structure that adjusting screw 18 and second pressure spring 19 constitute, change the degree of depth that adjusting screw 18 screwed in handle screw hole 141, can adjust the pretightning force that driven extrusion wheel 4 pressed to initiative extrusion wheel 3, be convenient for control first extrusion groove 302 and second extrusion groove 401 tooth to the bite-in force of consumptive material filament 21, improve the transport effect. The driving gear 15 and the large gear 16 form a speed reduction transmission structure, so that the output torque of the driving extrusion wheel 3 can be increased, and the device is suitable for working occasions requiring large pushing force to convey consumable filaments 21.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.

Claims (10)

1. The extrusion mechanism for 3D printing is characterized by comprising a motor (1), a base, a driving extrusion wheel (3), a driven extrusion wheel (4) and a handle, wherein the base is fixed on the output end of the motor (1) through a bolt, the handle is pivoted to the base through a pin shaft, a motor shaft (101) of the motor (1) drives the driving extrusion wheel (3) to rotate, the driven extrusion wheel (4) is connected to the working end of the handle through a bearing (403), the tail end of the handle is connected to the base through a compression structure, and the driven extrusion wheel (4) is close to the driving extrusion wheel (3) under the action of the compression structure; the initiative is extruded wheel (3) outer wall and is coaxial about setting up first extrusion groove (302) and first counter gear portion (303) respectively, driven extrusion wheel (4) outer wall is coaxial about setting up the second respectively and extrudes groove (401) and second counter gear portion (402), the gear parameter of first counter gear portion (303) and second counter gear portion (402) is the same and can be the counter mesh, the outer wall of first extrusion groove (302) and second extrusion groove (401) is provided with tooth and between the two through consumptive material filament (21) that need carry.

2. The extrusion mechanism for 3D printing according to claim 1, wherein: the motor base is a first motor base (2), the top of the first motor base (2) is open, the handle is a first handle (5), a pin shaft hole is formed in the head of the first handle (5), a sleeve (6) is installed in the pin shaft hole, and the sleeve (6) penetrates through a first bolt (7) and then is installed in a threaded bottom hole of the motor (1) after a through hole of the first motor base (2) is formed.

3. The extrusion mechanism for 3D printing according to claim 2, wherein: the pressing structure comprises a third bolt (9), a first pressure spring (10) and a fourth bolt (11), the third bolt (9) is in threaded connection with the inner side of the tail of the first handle (5), the fourth bolt (11) is in threaded connection with a threaded hole of an installation stud at the top of the first base (2), the first pressure spring (10) is pressed between the tail of the first handle (5) and the installation stud, and two ends of the first pressure spring are respectively sleeved on a bolt head of the third bolt (9) and a screwing-out end head of the fourth bolt (11).

4. The extrusion mechanism for 3D printing according to claim 3, wherein: the compressing structure further comprises a spring locking sleeve (1001), one end edge of the spring locking sleeve (1001) clings to the first pressure spring (10) at the large end of the spring locking sleeve and the small end of the spring locking sleeve stretches into the middle hole of the first pressure spring (10), a blind hole is formed in the large end of the spring locking sleeve (1001), and the head of the fourth bolt (11) is screwed into the blind hole.

5. The extrusion mechanism for 3D printing according to any one of claims 2 to 4, wherein: the driven extrusion wheel (4) is mounted on a mounting plate extending out of the working end of the first handle (5) through a bearing (403) and a second bolt (8); the driving extrusion wheel (3) is sleeved on the motor shaft (101) and locked by the lateral wall of the jackscrew (301) at the left-right symmetrical position.

6. The extrusion mechanism for 3D printing according to claim 5, wherein: set up feed inlet (501) on first handle (5), the inner orientation of feed inlet (501) first extrude groove (302) and second and extrude the fashioned circular arc hole of groove (401), first frame (2) is in set up quick-operation joint (12) that are used for the direction in the direction that consumable filament (21) flowed out.

7. The extrusion mechanism for 3D printing according to claim 1, wherein: the base comprises a second base (13) and a base cover (14), and the base cover (14) and the second base (13) are mounted on the top of the motor (1) through a plurality of fifth bolts (20) in an overlapped mode; the handle is a second handle (17), and the inner end of the second handle (17) is pivoted between the base cover (14) and the second base (13) through a second pin shaft (171).

8. The extrusion mechanism for 3D printing according to claim 7, wherein: the compressing structure comprises an adjusting screw (18) and a second compression spring (19), a long through hole penetrating through the adjusting screw (18) is formed in the tail of the second handle (17), a handle threaded hole (141) is formed in the position, corresponding to the long through hole, of the machine base cover (14), the end portion of the adjusting screw (18) is screwed into the handle threaded hole (141), and the second compression spring (19) is compressed between the nut of the adjusting screw (18) and the outer side wall of the second handle (17).

9. The extrusion mechanism for 3D printing according to claim 8, wherein: two mounting arms are extended inwards from the inner side wall of the middle part of the second handle (17), vertical shafts are vertically connected with the two mounting arms in a penetrating mode, and the driven extrusion wheel (4) is mounted on the vertical shafts through two discs of bearings (403).

10. The extrusion mechanism for 3D printing according to any one of claims 7 to 9, wherein: the extrusion device is characterized by further comprising a driving gear (15) and a large gear (16), wherein the driving gear (15) is coaxially mounted on the motor shaft (101), the driving gear (15) drives the large gear (16) to rotate, and the large gear (16) drives the driving extrusion wheel (3) to rotate; and a mounting shaft (304) of the driving extrusion wheel (3) is mounted between the machine base cover (14) and the second machine base (13) through bearings at two ends.

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