CN216885208U - 3D printer is with novel worm gear extrusion structure - Google Patents

Abstract

The utility model discloses a novel worm gear extrusion structure for a 3D printer, which comprises a machine frame, a transmission assembly and a driving assembly, wherein the transmission assembly is rotatably arranged on the machine frame, the driving assembly is arranged on the machine frame and is used for driving the transmission assembly, and the driving assembly drives consumables to do linear motion through the transmission assembly.

Description

3D printer is with novel worm gear extrusion structure

Technical Field

The utility model relates to the technical field of worm gears, in particular to a novel worm gear extrusion structure for a 3D printer.

Background

The basic principle of the FDM-level 3D printer is that a motor drives an extrusion wheel, consumables are fed in a filamentous mode, the consumables are heated and melted into micron-sized filaments at a nozzle through a radiator and a throat pipe, and the micron-sized filaments are stacked, solidified and molded according to the section outline of a 3D model along with the movement of a sprayer, so that a real object part is formed finally. Wherein, the motor constitutes whole actuating mechanism who beats printer head with extruding the wheel, and motor drive extrudes the wheel rotation, extrudes wheel and consumptive material contact, and the frictional force that produces through the contact surface lasts provides along axial drive power for the consumptive material for the action of consumptive material realization extrusion and pumpback.

Traditional extrusion mechanism, drive power are provided by step motor, slow down through the straight-tooth gear to promote the output torque, can realize like this under the step motor input of low-cost low moment of torsion, through the purpose that the moment of torsion is improved in the speed reduction. The speed reducing mechanism is generally realized by two ways: 1. and the large-tooth-number gear is connected in a switching way. 2. A planetary reduction gear set. The reduction ratio of the two speed reducing mechanisms is generally 1: 3-1: 7.5, and in order to improve the reduction ratio and increase the rotation torque, the size of the speed reducing gear is generally increased or the number of teeth of a gear ring is increased, so that the size of the speed reducing mechanism is large and heavy, and the speed reducing mechanism is not suitable for the requirements of light weight and high-speed printing.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects, the utility model aims to provide a novel worm and gear extrusion structure for a 3D printer, which is simple in structure, small in size, light in weight and large in reduction ratio, and meets the requirements of light weight and high-speed printing.

In order to achieve the above purposes, the utility model adopts the technical scheme that: the utility model provides a 3D printer is with novel worm gear extrusion structure, includes the frame, still including rotating the drive assembly who sets up on the frame and setting up on the frame and be used for driving drive assembly's drive assembly, drive assembly passes through drive assembly and is linear motion with the drive consumptive material, drive assembly is including being used for the worm with the drive assembly meshing, the worm is parallel with the moving direction of consumptive material.

The novel worm and gear extrusion structure for the 3D printer has the advantages that during operation, the driving assembly drives the consumable to do linear motion through the transmission assembly, so that the consumable slides up and down, and 3D printing action is realized; meanwhile, the novel worm gear extrusion structure for the 3D printer has the advantages of being small in overall size, light in weight and large in reduction ratio, and meets the requirements of light weight and high-speed printing.

The utility model is further improved in that the transmission assembly comprises a main transmission part and a secondary transmission part which are symmetrically arranged on the machine frame, the main transmission part is a driving worm wheel which is rotatably arranged in an opening of the machine frame, the secondary transmission part comprises a second handle and a driven extrusion wheel which is rotatably arranged on one side of the second handle and is positioned in the opening, the bottom end of the second handle is rotatably arranged in the opening, the top end of the second handle penetrates out of the opening, a worm of the driving assembly is meshed with a threaded surface on one side of the driving worm wheel, a gap for consumable materials to pass through is formed between the driven extrusion wheel and the threaded surface on the other side of the driving worm wheel, and an upper through opening and a lower through opening which are communicated with the opening are further arranged on the machine frame and are positioned on the same straight line with the upper through opening and the lower through opening. This transmission assembly adopts the form of single worm wheel, and when the worm rotated, can drive initiative worm wheel, driven extrusion wheel syntropy and rotate, and then drive consumptive material linear motion.

The utility model is further improved in that a second fixed shaft and a third fixed shaft are arranged in the opening, the driving worm wheel is sleeved on the second fixed shaft and can rotate, and the bottom end of the second handle is sleeved on the third fixed shaft and can rotate. The second fixed shaft realizes the rotation of the driving worm wheel, and the third fixed shaft realizes the rotation of the second handle.

The transmission assembly comprises a first transmission part and a second transmission part which are symmetrically arranged on a machine frame, the first transmission part comprises a first worm wheel and a first extrusion wheel which are coaxially and rotatably arranged on the machine frame, the second transmission part comprises a first handle, a second worm wheel and a second extrusion wheel which are coaxially and rotatably arranged on one side of the first handle, the bottom end of the first handle is symmetrically and rotatably arranged in an opening of the machine frame, the top end of the first handle penetrates through the opening, the first worm wheel and the second worm wheel are both meshed with a worm of the driving assembly, the first worm wheel and the second worm wheel are both positioned in the opening, a gap for consumable materials to pass through is formed between the first extrusion wheel and the second extrusion wheel, and the first extrusion wheel and the second extrusion wheel are both positioned outside the opening. This transmission assembly adopts two worm wheel forms, and when the worm rotated, can drive first worm wheel, second worm wheel simultaneously, antiport, and then drive first extrusion wheel, second extrusion wheel simultaneously, antiport to realize consumptive material linear motion.

The improved structure of the utility model further comprises an adjusting component, wherein the adjusting component comprises a bolt and a spring wound on the bolt, the bolt can penetrate through the machine frame in a threaded mode and is connected with the top end of the second handle or the first handle, one end of the spring is connected with the bolt, and the other end of the spring is connected with the top end of the second handle or the first handle. The bolt is in thread rotation on the frame, realizes stirring second handle or first handle top, and then realizes that second handle or first handle rotate. The arrangement of the spring further increases the adjustment range of the second handle or the first handle.

The utility model is further improved in that a rotating shaft penetrating through the opening is rotatably arranged at the opening, the first worm wheel and the first extrusion wheel are symmetrically arranged on the rotating shaft, a first fixed shaft is arranged in the opening, the bottom end of the first handle is sleeved on the first fixed shaft and can rotate, a double-layer connecting plate is arranged on one side of the bottom end of the first handle, a through hole is formed in the double-layer connecting plate, a connecting rod is arranged between the second worm wheel and the second extrusion wheel, penetrates through the through hole and can rotate in the through hole. The rotation axis realizes that first worm wheel, first extrusion wheel rotate, and first fixed axle realizes that first handle rotates. The connecting rod and the through hole realize that the second worm wheel and the second extrusion wheel rotate.

As a further improvement of the utility model, the heat dissipation device also comprises a plurality of heat dissipation columns which are uniformly arranged outside the opening of the machine frame. The heat dissipation column plays a role in heat dissipation and further dissipates heat of the machine frame, the transmission assembly and the driving assembly.

As a further improvement of the utility model, the device also comprises a throat pipe which is arranged outside the opening of the machine frame and is matched with the transmission assembly for use. The throat pipe can facilitate the blanking of consumables.

As a further improvement of the utility model, the driving component is a stepping motor vertically arranged outside the opening of the machine frame and a worm connected with an output shaft of the stepping motor and positioned in the opening. The stepping motor can be selected from a small-size and light-weight model, so that the whole structure is compact in size.

Drawings

FIG. 1 is a block diagram of a first embodiment of the present invention;

FIG. 2 is a block diagram of a transmission assembly according to an embodiment of the present invention;

FIG. 3 is a structural diagram of a second embodiment of the present invention;

FIG. 4 is a block diagram of a second drive assembly according to an embodiment of the present invention.

In the figure:

1. a machine frame; 2. a stepping motor; 3. a worm; 4. a drive worm gear; 5. a slave transmission part; 51. a second handle; 52. a driven extrusion wheel; 6. an adjustment assembly; 61. a bolt; 62. a spring; 7. a first transmission unit; 71. a first worm gear; 72. a first extrusion wheel; 8. a second transmission part; 81. a first handle; 82. a second worm gear; 83. a second extrusion wheel; 9. a rotating shaft; 10. a lower through opening; 11. an upper through hole; 12. a second fixed shaft; 13. a third fixed shaft; 14. a double-layer connecting plate; 15. a connecting rod; 16. a first stationary shaft.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.

Example one

Referring to the attached drawings 1-2, the novel worm and gear extrusion structure for the 3D printer comprises a machine frame 1, a transmission assembly and a driving assembly, wherein the transmission assembly is rotatably arranged on the machine frame 1, the driving assembly is arranged on the machine frame 1 and used for driving the transmission assembly, the driving assembly drives consumables to move linearly through the transmission assembly, the driving assembly comprises a worm meshed with the transmission assembly, and the worm is parallel to the moving direction of the consumables.

The implementation process of this embodiment, transmission assembly, drive assembly install on frame 1, accomplish the equipment of this 3D printer with novel worm gear extrusion structure. When the consumable is installed, the installation direction of the driving component is parallel to the moving direction of the consumable; can make this 3D printer with novel worm gear extrusion structure like this reduce at thickness direction's size greatly, consequently this 3D printer is with novel worm gear extrusion structure monolithic mounting just reduces greatly at the distance of stretching out on the 3D printer slide rail, has reduced the bending deformation that extrusion system leads to because of the dead weight then, has further promoted the motion precision of printing the in-process. The transmission assembly and the driving assembly of the embodiment have the characteristics of small volume, light weight and large reduction ratio.

During operation, the driving assembly drives the consumables to do linear motion through the transmission assembly, so that the consumables slide up and down, and 3D printing action is realized; meanwhile, the novel worm gear extrusion structure for the 3D printer has the advantages of being small in overall size, light in weight and large in reduction ratio, and meets the requirements of light weight and high-speed printing. And meanwhile, the assembly and disassembly are convenient, and the universality is high.

In an example, drive assembly sets up the final drive portion on frame 1 and follows drive portion 5 including the symmetry, the final drive portion sets up at frame 1 intraoral initiative worm wheel 4 for rotating, include second handle 51 and rotate from drive portion 5 and set up second handle 51 one side and lie in intraoral driven extrusion wheel 52, second handle 51 bottom is rotated and is set up in the opening, the opening is worn out on the top, drive assembly's worm 3 and the meshing of initiative worm wheel 4 one side flank, can form the gap that supplies the consumptive material to pass between driven extrusion wheel 52 and the initiative worm wheel 4 opposite side flank, still be provided with on frame 1 with the last wearing opening 11 of opening intercommunication, lower wearing opening 10 and gap and last wearing opening 11, lower wearing opening 10 be in lieing in same straight line. Manually poking the top end of the second handle 51 by a person to enable the second handle 51 to rotate and drive the driven extrusion wheel 52 to move towards the direction far away from the driving worm wheel 4, wherein the gap is enlarged, and consumables can sequentially pass through the upper through opening 11, the gap and the lower through opening 10; after the feeding of the consumables is completed, a person rotates the top end of the second handle 51 in the opposite direction, and the consumables are stably clamped between the driven extrusion wheel 52 and the thread surface on the other side of the driving worm wheel 4. When no external force is applied, the second handle 51 does not rotate. This drive assembly adopts single worm wheel form, and when worm 3 rotated, can drive initiative worm wheel 4 and rotate, and initiative worm wheel 4 drives the consumptive material and removes, transmits the transmission power to driven extrusion wheel 52 when the consumptive material removes on, and then realizes initiative worm wheel 4, the synchronous rotation of driven extrusion wheel 53 for the consumptive material removes more stably. Utilize the tooth point meshing thread face of initiative worm wheel 4 self, process out "worm wheel/extrusion tooth profile line" thread face of cooperation consumptive material, this thread face and consumptive material direct contact, when initiative worm wheel 4 meshes driven with worm 3 promptly, 4 opposite sides of initiative worm wheel and consumptive material interlock, the drive consumptive material carries out linear motion. Meanwhile, the other side of the consumable is meshed with the driven extrusion wheel 52, so that the consumable is better driven to do linear motion on the premise of meeting the stress balance. The transmission assembly has the characteristics of small volume, light weight and large reduction ratio. Wherein the opening is irregular; the manner of rotation of the driven extrusion wheel 52 is conventional and will not be described in greater detail herein.

Referring to fig. 1-2, in an example, a second fixed shaft 12 and a third fixed shaft 13 are disposed in the opening, the driving worm wheel 4 is sleeved on the second fixed shaft 12 and can rotate, and the bottom end of the second handle 51 is sleeved on the third fixed shaft 13 and can rotate. The second fixed shaft 12 realizes the rotation of the driving worm wheel 4, and the third fixed shaft 13 realizes the rotation of the second handle 51.

Referring to fig. 1, in order to accurately orient and dial the second handle 51, in one example, the adjusting assembly 6 is further provided, wherein the adjusting assembly 6 comprises a bolt 61 and a spring 62 wound on the bolt 61, the bolt 61 can be threaded through the machine frame 1 and connected with the top end of the second handle 51, and one end of the spring 62 is connected with the bolt 61, and the other end is connected with the top end of the second handle 51. The bolt 61 is screwed on the machine frame 1 to realize the purpose of shifting the top end of the second handle 51, and further realize the purpose of rotating the bottom end of the second handle 51. The provision of the spring 62 further increases the adjustment range of the second handle 51.

The present embodiment may also be used in conjunction with an extrusion system, which may be a heat sink post, throat, or duct structure, and is not limited to these particular structures of the present embodiment.

In one example, the heat dissipation device further comprises a plurality of heat dissipation columns uniformly arranged outside the opening of the machine frame 1. The heat dissipation column plays a role in heat dissipation and further dissipates heat of the machine frame 1, the transmission assembly and the driving assembly. Wherein, the machine frame 1 is a heat radiator. The heat dissipation structure of the heat dissipation column is not limited, and the heat dissipation structure can also be a heat dissipation fin; as long as the structure has a heat dissipation function.

In one example, a throat is included that is disposed outside of the frame 1 opening and cooperates with the drive assembly. The throat can be fed with convenient consumables, for example, the consumables can be conveniently fed into the nozzle (namely, the next station).

In one example, the driving component is a stepping motor 2 vertically arranged outside the opening of the machine frame 1 and a worm 3 connected with an output shaft of the stepping motor 2 and positioned in the opening. The stepping motor 2 of this embodiment is directly connected with the worm 3 (can also be connected with the worm 3 through a switching mode), and the structure is simple. The stepping motor 2 is vertically arranged outside the opening of the machine frame 1, and the gravity direction of the stepping motor is along the axial direction of the worm 3, so that additional bending moment is not generated, and the worm 3 cannot be bent and deformed due to cantilever arrangement. Meanwhile, the reduction ratio of the novel worm and gear extrusion structure for the 3D printer is large and can easily reach more than 20:1, so that the stepping motor 2 can further select a model with small volume and light weight, the overall structure is further compact in size, the volume and the weight of the extrusion system are greatly reduced, and the high-speed printing requirement of the 3D printing market can be met. Wherein the stepping motor 2 may be a 28-step motor 2.

Example two

Referring to fig. 3-4, the present embodiment is different from the first embodiment in that the transmission assembly of the present embodiment comprises a first transmission part 7 and a second transmission part 8 symmetrically arranged on the machine frame 1, the first transmission part 7 comprises a first worm wheel 71 and a first extrusion wheel 72 which are coaxially and rotatably arranged on the machine frame 1, the second transmission part 8 comprises a first handle 81, a second worm wheel 82 and a second extrusion wheel 83 which are coaxially and rotatably arranged on one side of the first handle 81, the bottom end of the first handle 81 is rotatably arranged in the opening of the machine frame 1, the top end of the first handle penetrates out of the opening, the first worm wheel and the second worm wheel are both meshed with the worm 3 of the driving assembly and are both positioned in the opening, a gap for the consumables to pass through can be formed between the first extrusion wheel 72 and the second extrusion wheel 83, and the first extrusion wheel 72 and the second extrusion wheel 83 are both positioned outside the opening. A person manually stirs the top end of the first handle 81 to enable the bottom end of the first handle 81 to rotate, and then the second worm wheel 82 and the second extrusion wheel 83 are driven to rotate, at the moment, the gap is enlarged, and the consumable can penetrate through the gap; after finishing the feeding of the consumables, the person rotates the top end of the second handle 51 in the opposite direction, and the consumables are stably clamped between the first extrusion wheel 72 and the second extrusion wheel 83. The first handle 81 does not rotate when no external force is applied. This drive assembly adopts two worm wheel forms, and when worm 3 rotated, can drive first worm wheel, second worm wheel simultaneously, antiport, and then drive first extrusion wheel 72, second extrusion wheel 83 simultaneously, antiport to realize consumptive material rectilinear motion (the consumptive material can extrude or return). When the stepping motor 2 drives the worm 3 to rotate, a torque M1 is generated, the worm 3 is matched with a first worm wheel and a second worm wheel, wherein the number of teeth of the worm wheel Z2 and the number q of the heads of the worm 3 are reduced to i which is equal to Z2/q, and therefore the first worm wheel and the second worm wheel generate a large torque M2. The transmission assembly has the characteristics of small volume, light weight and large reduction ratio. Adopt two worm wheel forms, 2 times for adopting single worm wheel form to the drive power of consumptive material, be fit for flexible consumptive material and composite fiber consumptive material loading more.

In one example, in order to accurately orient and toggle the first handle 81, the adjusting assembly is also included, and the adjusting assembly is the same as the adjusting assembly 6, and the adjusting assembly also comprises a bolt and a spring wound on the bolt, the bolt is threaded through the machine frame 1 and connected with the top end of the first handle 81, one end of the spring is connected with the bolt, and the other end of the spring is connected with the top end of the first handle 81. The bolt is in threaded rotation on frame 1, realizes stirring first handle 81 top, and then realizes that first handle rotates. The provision of the spring further increases the adjustment range of the first handle 81.

Referring to fig. 3-4, in an example, the opening is rotatably provided with a rotating shaft 9 penetrating through the opening, the first worm wheel 71 and the first extruding wheel 72 are symmetrically arranged on the rotating shaft 9, the opening is internally provided with a first fixed shaft 16, the bottom end of the first handle 81 is sleeved on the first fixed shaft 16 and can rotate, one side of the first handle 81 is provided with a double-layer connecting plate 14, a through hole is formed in the double-layer connecting plate 14, a connecting rod 15 is arranged between the second worm wheel 82 and the second extruding wheel 83, and the connecting rod 15 penetrates through the through hole and can rotate in the through hole. The rotation shaft 9 rotates the first worm wheel 71 and the first extrusion wheel 72, and the first fixed shaft 16 rotates the first handle 81. The connecting rod 15, the through hole, enables the second worm wheel 82 and the second extrusion wheel 83 to rotate.

In one example, the extrusion system may also be used in conjunction. For example, a duct structure may also be provided in the opening of frame 1. The catheter structure is used in conjunction with the first extrusion wheel 72, the second extrusion wheel 83, wherein the tip of the catheter structure will fit into the gap, thereby enabling seamless guidance of the consumable. The pipe structure can further make things convenient for the consumptive material to carry out linear motion, especially flexible consumptive material.

The structure of this patent transmission subassembly is based on the transmission theory of worm gear, can carry out the structural evolution of different forms and carry out the combination of multiple form with the printer head. Therefore, such extensions are covered by this patent except as covered by examples one and two.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (9)

1. The utility model provides a 3D printer is with novel worm gear extrusion structure, includes frame (1), its characterized in that: still including rotating the drive assembly who sets up on frame (1) and setting up the drive assembly who just is used for driving drive assembly on frame (1), drive assembly is linear motion through drive assembly drive consumptive material, drive assembly is including being used for the worm with the drive assembly meshing, the worm is parallel with the moving direction of consumptive material.

2. The novel worm and gear extrusion structure for the 3D printer according to claim 1, characterized in that: the transmission component comprises a main transmission part and a driven transmission part (5) which are symmetrically arranged on the machine frame (1), the main transmission part is a driving worm wheel (4) which is rotatably arranged in an opening of the machine frame (1), the slave transmission part (5) comprises a second handle (51) and a driven extrusion wheel (52) which is rotatably arranged at one side of the second handle (51) and is positioned in the opening, the bottom end of the second handle (51) is rotatably arranged in the opening of the machine frame (1), the top end of the second handle penetrates out of the opening, the worm (3) of the driving component is meshed with a thread surface on one side of the driving worm wheel (4), a gap for consumable materials to pass through can be formed between the driven extrusion wheel (52) and the thread surface on the other side of the driving worm wheel (4), the machine frame (1) is further provided with an upper penetrating opening (11) communicated with the opening, a lower penetrating opening (10), and the gap, the upper penetrating opening (11) and the lower penetrating opening (10) are located on the same straight line.

3. The novel worm and gear extrusion structure for the 3D printer according to claim 2, characterized in that: the opening is internally provided with a second fixed shaft (12) and a third fixed shaft (13), the driving worm wheel (4) is sleeved on the second fixed shaft (12) and can rotate, and the bottom end of the second handle (51) is sleeved on the third fixed shaft (13) and can rotate.

4. The novel worm and gear extrusion structure for the 3D printer according to claim 1, characterized in that: the transmission component comprises a first transmission part (7) and a second transmission part (8) which are symmetrically arranged on the machine frame (1), the first transmission part (7) comprises a first worm wheel (71) and a first extrusion wheel (72) which are coaxially and rotatably arranged on the machine frame (1), the second transmission part (8) comprises a first handle (81), a second worm wheel (82) and a second extrusion wheel (83) which are coaxially and rotatably arranged on one side of the first handle (81), the bottom end of the first handle (81) is rotatably arranged in the opening of the machine frame (1), the top end of the first handle penetrates out of the opening, the first worm wheel and the second worm wheel are both meshed with a worm (3) of the driving assembly and are both positioned in the opening, a gap for the consumable to pass through can be formed between the first extrusion wheel (72) and the second extrusion wheel (83), and the first extrusion wheel (72) and the second extrusion wheel (83) are both located outside the opening.

5. The novel worm and gear extrusion structure for the 3D printer according to claim 2 or 4, wherein: still include adjusting part (6), adjusting part (6) include bolt (61) and around establishing spring (62) on bolt (61), bolt (61) can the screw thread pass frame (1) and be connected with second handle (51) or first handle (81) top, spring (62) one end is connected with bolt (61), the other end is connected with second handle (51) or first handle (81) top.

6. The novel worm and gear extrusion structure for the 3D printer according to claim 4, wherein: the opening part is rotatably provided with a rotating shaft (9) penetrating through the opening, a first worm wheel (71) and a first extrusion wheel (72) are symmetrically arranged on the rotating shaft (9), a first fixed shaft (16) is arranged in the opening, the bottom end of a first handle (81) is sleeved on the first fixed shaft (16) and can rotate, a double-layer connecting plate (14) is arranged on one side of the first handle (81), a through hole is formed in the double-layer connecting plate (14), a connecting rod (15) is arranged between a second worm wheel (82) and a second extrusion wheel (83), the connecting rod (15) penetrates through the through hole, and the connecting rod (15) can rotate in the through hole.

7. The novel worm and gear extrusion structure for the 3D printer according to claim 1, characterized in that: still including evenly setting up many heat dissipation posts outside frame (1) opening.

8. The novel worm and gear extrusion structure for the 3D printer according to claim 1, characterized in that: the automatic feeding machine also comprises a throat pipe which is arranged outside an opening of the machine frame (1) and is matched with the transmission assembly for use.

9. The novel worm and gear extrusion structure for the 3D printer according to claim 1, characterized in that: drive assembly is for setting up step motor (2) outside frame (1) opening perpendicularly and with step motor (2) output shaft and be located open-ended worm (3).

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