CN214983262U

CN214983262U - 3D prints extruder gear structure, 3D and prints extruder and 3D printer

Info

Publication number: CN214983262U
Application number: CN202023246714.0U
Authority: CN
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 吴大江
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-12-03
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses a 3D prints extruder gear structure, 3D and prints extruder and 3D printer belongs to 3D and prints technical field. The 3D printing extruder gear structure comprises at least one pair of gears meshed with each other; the circumference teeth of a cogwheel of gear are inwards sunken to be provided with the recess, be provided with in the recess along the tooth that the circumference of gear extended, the wire clamp of 3D printer is located two on the gear between the recess, two maximum distance between the recess is less than the diameter of wire rod, so that two the recess presss from both sides tightly the wire rod. The utility model discloses a can promote the extrusion frictional force of gear and wire rod, reduce the complete machine volume, reduce the load torque of motor and promote the 3D of complete machine operating stability and print extruder gear structure, 3D and print extruder and 3D printer.

Description

3D prints extruder gear structure, 3D and prints extruder and 3D printer

Technical Field

The utility model relates to a 3D prints technical field, especially relates to a 3D prints extruder gear structure, 3D and prints extruder and 3D printer.

Background

3D printing technology, especially FDM (Fused Deposition Modeling, technology Fused Deposition manufacturing) hot melt technology is more and more favored by DIY fans, is provided with the extruder on the 3D printing, and the extruder is used for extruding the wire rod of 3D printing, and the wire rod is the material that the product used is printed to the wire rod.

In the prior art, the gear that is used for extruding the wire rod on the extruder is less with the area of contact of wire rod, the extrusion force is not enough, and the wire rod skids easily, in addition, because the structural constraint of extruder gear, lead to the extruder size great, be unfavorable for the miniaturized design of product, and simultaneously, because the structural constraint of extruder gear, the atress point that leads to gear and wire rod contact is far away with the motor distance, the load torque of motor is great, make the requirement of motor moment higher, the atress point of gear and wire rod contact still can reduce the conversion efficiency of motor output with the motor distance is far away.

SUMMERY OF THE UTILITY MODEL

The utility model provides a 3D prints extruder gear structure, this 3D prints extruder gear structure can promote the frictional force of gear and wire rod, reduces the complete machine volume, reduces the load torque of motor and promotes complete machine operating stability.

To achieve the purpose, the utility model adopts the following technical proposal:

A3D printing extruder gear structure comprises at least one pair of gears meshed with each other; the circumference teeth of a cogwheel of gear are inwards sunken to be provided with the recess, be provided with in the recess along the tooth that the circumference of gear extended, the wire clamp of 3D printer is located two on the gear between the recess, two maximum distance between the recess is less than the diameter of wire rod, so that two the recess presss from both sides tightly the wire rod.

As an alternative of the above 3D printing extruder gear structure, the teeth in the groove are trapezoidal teeth or circular arc teeth.

As an alternative to the above 3D printing extruder gear structure, the teeth in the groove include first and second teeth having different heights, the second tooth having a height higher than the first tooth.

As an alternative of the gear structure of the 3D printing extruder, the number of the first teeth is one, the number of the second teeth is two, and the two second teeth are respectively arranged on two sides of the first teeth along the axial direction of the gear.

As an alternative to the above 3D printing extruder gear structure, the side walls of the groove are perpendicular to the axial direction of the gear so that the wire is confined in the groove.

As an alternative to the 3D printing extruder gear structure described above, the tips of the teeth in the grooves are lower than the roots of the teeth at both ends of the gear in its axial direction.

As an alternative to the above-described gear structure of the 3D printing extruder, the teeth in the groove are trapezoidal teeth having an angle of 5 ° to 60 °, a tooth height of 0.1mm to 1mm, and a tooth tip width of 0.01mm to 0.3 mm.

As above-mentioned 3D prints extruder gear structure's alternative, the center of gear is provided with the shaft hole, wear to be equipped with the pivot in the shaft hole, the both ends of pivot all support on the extruder.

As an alternative to the above 3D printing extruder gear structure, the angle of the teeth in the groove is 5 ° to 60 °, the tooth height is 0.1mm to 1mm, and the tooth tip width is 0.01mm to 0.3 mm.

The utility model also provides a 3D prints extruder, including the motor, still include as above 3D print extruder gear structure, the motor with gear connection, with the drive gear revolve.

The utility model also provides a 3D printer, include as above 3D print the extruder.

The utility model discloses a 3D prints extruder gear includes at least a pair of intermeshing gear, and has set up the recess in the gear along its axial intermediate position, and the wire rod is pressed from both sides tightly between two recesses, and when the gear rotated, the wire rod was extruded in the recess, is provided with the tooth that extends along gear circumference in the recess, and this tooth can block into the wire rod, increases and extrudes frictional force, prevents that the wire rod from skidding;

the two ends of the two gears along the axial direction are meshed with each other, the groove is approximately arranged in the middle of the gears, so that the stress point of the gears is in the middle, the two ends of the gears are support points, and the middle of the gears is stressed, so that the stress is more stable, and the stable wire feeding is realized;

the groove is arranged for accommodating the wire, so that the overall size of the two gears matched with the wire is reduced, and the size of the whole machine is reduced;

the groove is formed, so that the contact point of the wire and the gear is closer to the center of the gear, the distance from the extrusion stress point to the motor shaft is shortened, the load torque of the motor is reduced, the requirement on the motor torque is reduced, and the conversion efficiency of motor output is improved.

Drawings

Fig. 1 is a schematic structural diagram of a gear structure embodiment of a 3D printing extruder according to the present invention;

fig. 2 is a schematic perspective view of a first embodiment of the middle gear of the present invention;

FIG. 3 is a schematic top view of the gear of FIG. 2 according to the present invention;

FIG. 4 is a side view of the gear of FIG. 2 according to the present invention;

FIG. 5 is a schematic top view of a second embodiment of the middle gear of the present invention

Fig. 6 is a schematic top view of a third embodiment of the middle gear of the present invention.

In the figure:

100. a gear; 110. a groove; 111. a side wall; 112. a first tooth; 113. a second tooth; 120. a shaft hole; 200. and (3) wire rods.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The utility model provides a 3D prints extruder gear structure, as shown in FIG. 1, 3D prints extruder gear structure and includes at least a pair of intermeshing's gear 100, and wire rod 200 presss from both sides and establishes between two gears 100, extrudes wire rod 200 when gear 100 rotates, realizes sending a silk, accomplishes and prints. One of the two gears 100 may be connected to a motor as a driving wheel, and the other may be used as a driven wheel, or both of the two gears 100 may be connected to a motor as a driving wheel, which is not limited herein.

Referring to fig. 2 and 3, a circle of grooves 110 is recessed inwards in a circumferential gear tooth surface of the gear 100, a wire 200 of the 3D printer is clamped between the grooves 110 of the two gears 100, and a maximum distance between the two grooves 110 is smaller than a diameter of the wire 200, so that the two grooves 110 clamp the wire 200, that is, the wire 200 is clamped by the two grooves 110, and after the gear 100 rotates, the wire 200 is extruded outwards in the grooves 110, and wire feeding printing is completed. In one embodiment, the groove 110 is disposed approximately at the middle position of the gear 100 along the axial direction thereof, so that the middle position of the gear 100 is in contact with the wire 200, the pressing force point is at the middle position of the gear 100 in the axial direction, the force is more balanced, and the smooth wire feeding is realized.

Providing the groove 110 to clamp the wire 200 may increase a contact area of the gear 100 and the wire 200, thereby increasing a frictional force between the gear 100 and the wire 200, increasing an extrusion force of the wire 200. As shown in fig. 2 and 3, the groove 110 is provided with teeth extending along the circumferential direction of the gear 100, and the teeth extending along the circumferential direction of the gear 100 in the groove 110 can enable the teeth to be embedded into the wire 200 to clamp the wire 200, so that the wire 200 is prevented from slipping, and the extrusion friction force is increased. Two gears 100 mesh with each other along the axial both ends, and recess 110 sets up in the centre of gear 100 for gear 100's stress point is in the centre, and the both ends of gear 100 are the strong point, and middle atress makes the atress more steady like this, realizes steadily sending a silk. The groove 110 is provided to accommodate the wire 200, and the overall size of the two gears 100 and the wire 200 after being engaged is reduced, thereby reducing the size of the overall machine. The groove 110 is arranged, so that the contact point of the wire 200 and the gear 100 is closer to the center of the gear 100, the distance from the extrusion stress point to the motor shaft is shortened, and the load torque of the motor is reduced, thereby reducing the requirement on the motor torque and improving the conversion efficiency of the motor output.

Preferably, the teeth on the gear 100 (including the teeth at both ends of the gear 100 and the teeth in the groove 110) are hobbing, the hobbing method is simple, the processing cost is low, fig. 4 is a schematic side view of the gear shown in fig. 2, the side view in fig. 4 is a side view of the gear 100, and the side view of the hobbing of the end of the gear 100 along the axial direction can be seen from fig. 4.

As can be seen from fig. 4, the teeth in the groove 110 are completely invisible from the side view of the gear 100, and the tooth tips of the teeth in the groove 110 are approximately at the positions of the dotted lines shown in fig. 4, that is, the tooth tips of the teeth in the groove 110 are lower than the tooth roots of the teeth at both ends of the gear 100 in the axial direction, or the tooth tips of the teeth in the groove 110 are flush with the tooth roots of the teeth at both ends of the gear 100 in the axial direction, so that the processing difficulty can be reduced, for example, the teeth can be processed on the gear 100 in the axial direction, a groove 110 can be processed at the middle part of the gear 100, and the teeth extending along the circumferential direction of the gear 100 can be processed at the groove bottom of the groove 110, so that the entire gear 100 is processed. If the tooth tips of the teeth in the grooves 110 are higher than the tooth roots of the teeth at both ends of the gear 100 in the axial direction thereof, the difficulty in machining is high and the machining cost is high.

As shown in fig. 3, the width f of the groove 110 in the axial direction of the gear 100 is approximately 1mm to 3mm, and approximately accounts for 1/5 to 1/4 of the axial dimension of the gear 100, so that not only is enough space for accommodating the wire 200 in the groove 110 ensured, but also the structural strength of the gear 100 is ensured to ensure the normal operation of the machine, and in addition, the width f of the groove 110 is not too wide, so that the wire 200 is limited and prevented from moving. As shown in fig. 3, the depth e of the groove 110 is preferably 1.5mm to 3.2mm to ensure that the groove 110 has a sufficient depth to accommodate the wire 200 and to confine the wire 200 within the groove 110.

As shown in fig. 3, the side wall 111 of the groove 110 is perpendicular to the axial direction of the gear 100, so that the wire 200 can be well limited, and the wire 200 can be limited in the groove 110. Certainly, the side wall 111 can also incline towards the opposite side wall 111 to form the concave side wall 111, so that the wire 200 is hooked, and the limiting effect is better.

The teeth in the groove 110 may be trapezoidal teeth or circular arc teeth. The teeth in the groove 110 shown in fig. 3 are trapezoidal teeth, and the teeth in the groove 110 shown in fig. 5 are circular arc teeth, that is, the two sides of the teeth are circular arc. Trapezoidal teeth and circular arc teeth can be well embedded into the wire 200, so that the extrusion friction force is improved.

Preferably, the teeth in the groove 110 are trapezoidal teeth, which are easier to process. As shown in FIG. 3, the angle r of the trapezoidal teeth is 5 to 60 degrees, the tooth height is 0.1 to 1mm, and the tooth tip width is 0.01 to 0.3 mm.

Fig. 6 is a schematic top view of a third embodiment of the middle gear of the present invention, as shown in fig. 6, the teeth in the groove 110 include a first tooth 112 and a second tooth 113 with different heights, the height of the second tooth 113 is higher than that of the first tooth 112, and the teeth with different heights disposed in the groove 110 can enhance the pressing force and the anti-slip effect.

Further, as shown in fig. 6, the first tooth 112 is one, the number of the second teeth 113 is two, the two second teeth 113 are respectively disposed on two sides of the first tooth 112 along the axial direction of the gear 100, and the two second teeth 113 with a higher height are disposed on two sides of the first tooth 112, so that the two second teeth 113 further limit the wire 200 and prevent the wire 200 from swaying. Preferably, the second teeth 113 are 0.2mm to 0.6mm higher than the first teeth 112.

Referring to fig. 1 and 2, a shaft hole 120 is formed in the center of the gear 100, the shaft hole 120 penetrates through two axial ends of the gear 100, when the gear 100 is installed, a rotating shaft penetrates through the shaft hole 120, and two ends of the rotating shaft are supported on the extruder, so that two ends of the gear 100 are supported, and the gear 100 operates more stably. Of course, only one end of the rotating shaft can be supported on the extruder, and the other end of the rotating shaft can be suspended.

The utility model also provides a 3D prints the extruder, 3D print the extruder and include that motor and above-mentioned 3D print extruder gear structure, and the motor is connected with gear 100 to drive gear 100 rotates. Specifically, one of the two gears 100 may be connected to a rotor of the motor, and the other may be used as a driven wheel, so that the overall structure may be simplified, the overall cost may be reduced, and the assembly may be facilitated. The utility model discloses a 3D prints the extruder because adopted above-mentioned 3D to print extruder gear structure, so have 3D at least and print the beneficial effect that extruder gear structure had, repeated redundant description is no longer given here.

The utility model also provides a 3D printer, 3D printer include above-mentioned 3D and print the extruder.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A 3D printing extruder gear structure, characterized by comprising at least one pair of intermeshing gears (100); the circumference teeth of a cogwheel of gear (100) are provided with recess (110) towards inside recess, be provided with in recess (110) along the tooth of the circumference extension of gear (100), and 3D printer's wire rod (200) press from both sides and locate two on gear (100) between recess (110), two the maximum distance between recess (110) is less than the diameter of wire rod (200), so that two recess (110) press from both sides tightly wire rod (200).

2. The 3D printing extruder gear structure according to claim 1, wherein the teeth in the groove (110) are trapezoidal teeth or circular arc teeth.

3. The 3D printing extruder gear structure according to claim 1, wherein the teeth in the groove (110) comprise a first tooth (112) and a second tooth (113) of different heights, the second tooth (113) having a height higher than the height of the first tooth (112).

4. The 3D printing extruder gear structure according to claim 3, wherein the first tooth (112) is one, the second tooth (113) is two, and the two second teeth (113) are respectively arranged on two sides of the first tooth (112) along the axial direction of the gear (100).

5. The 3D printing extruder gear structure according to any one of claims 1-4, wherein the side wall (111) of the groove (110) is perpendicular to the axial direction of the gear (100) such that the wire (200) is confined in the groove (110).

6. The 3D printing extruder gear structure according to claim 1, wherein the tips of the teeth in the groove (110) are lower than the roots of the teeth at both ends of the gear (100) in its axial direction, or are flush with the roots of the teeth at both ends of the gear (100) in its axial direction.

7. The 3D printing extruder gear structure according to claim 1, wherein the teeth in the groove (110) are trapezoidal teeth with an angle of 5 ° to 60 °, a tooth height of 0.1mm to 1mm, and a tooth tip width of 0.01mm to 0.3 mm.

8. The gear structure of the 3D printing extruder according to claim 1, wherein a shaft hole (120) is formed in the center of the gear (100), a rotating shaft penetrates through the shaft hole (120), and both ends of the rotating shaft are supported on the extruder.

9. 3D printing extruder comprising a motor, characterized by further comprising a gear structure of the 3D printing extruder according to any one of claims 1 to 8, wherein the motor is connected with the gear (100) to drive the gear (100) to rotate.

10. A 3D printer comprising the 3D printing extruder of claim 9.