CN214983233U - 3D prints extruder gear structure, 3D and prints extruder and 3D printer - Google Patents

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 face inwards caves in and is provided with the recess, is provided with the gear hobbing of following the axial extension of gear in the recess, and the wire rod clamp of 3D printer is located between the recess on two gears, and the maximum distance between two recesses is less than the diameter of wire rod to make two recesses press from both sides the tight wire rod. The utility model discloses a can promote the frictional force of gear and wire rod, reduce the complete machine volume and reduce the load torque's of motor 3D 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 technique, especially FDM hot melt technique receives DIY fan's favor more and more, is provided with the extruder on the 3D prints, and the extruder is used for extruding the wire rod that 3D printed, and the wire rod is for printing the material that the product used.

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 and reduces the load torque of motor.

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 is inwards sunken to be provided with the recess, be provided with in the recess along the axially extended gear hobbing of gear, 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 to the above 3D printing extruder gear structure, the depth of the groove is greater than the depth of the tooth slot between adjacent teeth on the gear.

As an alternative to the above 3D printing extruder gear structure, the hobbing in the groove corresponds one-to-one with the gear teeth on the gear circumferential surface.

As an alternative to the above-mentioned gear structure of the 3D printing extruder, the shape of the groove is an arc, a V, or a U.

As an alternative of the above 3D printing extruder gear structure, the shape of the groove is a circular arc, and the circular arc shape of the groove is adapted to the wire.

As an alternative to the above 3D printing extruder gear structure, the groove has a width in the axial direction of the gear of 1mm to 4 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-described 3D printing extruder gear structure, the angle of the hobbing 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 gear that meshes mutually, 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 rotates, the wire rod is extruded in the recess, and the setting of recess has increased the area of contact of gear and wire rod, has increased frictional force, and is provided with the tooth in the recess, can prevent that the wire rod from skidding;

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 arranged, 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 a motor shaft is shortened, and the load torque of the motor is reduced, so that the requirement on the torque of the motor is reduced, and the conversion efficiency of the output of the motor is improved;

two gears are meshed with each other along the two axial ends of the gears, the groove is formed in the middle of the gear, so that the stress point of the gear is in the middle, the two ends of the gear are supporting points, the middle of the gear is stressed, the stress is more stable, and stable wire feeding is realized.

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 cross-sectional view of the structure of fig. 3 taken along a plane b according to the present invention;

fig. 6 is a schematic top view of a second embodiment of the middle gear of the present invention.

In the figure:

100. a gear; 110. a groove; 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 can be connected with the motor to serve as a driving wheel, the other one can serve as a driven wheel, and the two gears can be connected with the motor to serve as the driving wheel without limitation.

Referring to fig. 2, a circle of grooves 110 is recessed inward on a circumferential gear tooth surface of the gear 100, a wire 200 of the 3D printer is clamped between the grooves 110 on 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 is extruded out of the grooves 110, and wire feeding printing is completed. In the present embodiment, the groove 110 is located at an intermediate position of the gear in the axial direction thereof.

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 grooves 110 are provided with hobbing extending in the axial direction of the gear 100, so that the wire 200 can be prevented from slipping. 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. 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.

In other implementations, the gear teeth in the groove 110 may also extend along the circumferential direction of the gear 100, but the gear teeth in the groove 110 may have a better anti-slip effect along the axial direction of the gear 100, because the gear teeth extend along the axial direction of the gear 100 perpendicular to the feeding direction of the wire 200, so the anti-slip effect is better.

Preferably, the teeth of a cogwheel at both ends of gear 100 and the gear hobbing in recess 110 all adopt the gear hobbing mode, and the gear hobbing processing mode is simple, and the processing cost is lower, and fig. 4 is the side view structure diagram of the gear shown in fig. 2 of the utility model, can see the side view structure of the teeth of a cogwheel that gear 100 both ends were processed out from fig. 4.

Referring to fig. 4, the hobbing in the groove 110 corresponds to the teeth on the circumferential surface of the gear 100 one by one, that is, the hobbing in the groove 110 and the teeth on both ends of the gear 100 may be the same tooth, for example, a gear with teeth machined on the surface may be used, and a groove 110 is directly formed in the middle of the gear 100, so that a part of the teeth on the original gear 100 is also retained in the groove 110, and there is no need to additionally machine teeth in the groove 110. Alternatively, a portion of the teeth of the original gear 100 retained in the groove 110 may be further processed, so that the amount of processing can be reduced as compared with the case where the processing of the teeth is started in the groove 110 having no teeth.

Fig. 5 is a schematic cross-sectional view of the structure of fig. 3 taken along a plane b in the groove 110, so that fig. 5 shows the shape of the hobbing in the groove 110, and as shown in fig. 5, the teeth in the groove 110 are substantially triangular and have a sharp top, which is beneficial for clamping the wire 200. Fig. 5 shows additional hobbing of the recess 110 without using the original teeth of the gear 100, so the shape of the hobbing of fig. 5 is different from the shape of the hobbing of fig. 4.

With continued reference to fig. 5, the angle r of the teeth in the groove 110 is 5 ° to 60 °, the tooth height is 0.1mm to 1mm, the tooth top width is 0.01mm to 0.3mm, and the tooth top width is 0.01mm to 0.3mm, which means that the tooth top of the teeth in the groove 110 can be small, for example, 5, which is close to the shape of the corner tip of a triangle.

Referring to fig. 3 and 4, the depth e of the groove 110 is greater than the depth h of the gear between adjacent gear teeth on the gear 100, so that the groove 110 has a sufficient depth to accommodate the wire, and if the depth of the groove 110 is not sufficient, when the wire 200 is clamped between two gears 100, the two gears 100 are separated too far, the engagement degree is not sufficient, the operation stability is affected, and the extrusion force is also reduced. In one embodiment, the depth e of the groove 110 is 0.7mm to 3.5 mm.

The shape of the groove 110 can be various, as shown in fig. 3, the groove 110 is arc-shaped, preferably, the groove 110 is arc-shaped, and the arc-shaped of the groove 110 is matched with the wire 200; in addition, as shown in fig. 6, the groove 110 may also be V-shaped, and in other embodiments, the groove 110 may also be U-shaped, which is not limited herein.

In one embodiment, as shown in fig. 3, the width f of the groove 110 in the axial direction of the gear 100 is 1mm to 4mm, which substantially occupies 1/3 of the axial dimension of the gear 100, thus ensuring both sufficient space in the groove 110 to accommodate the wire 200 and the structural strength of the gear 100 to ensure proper operation of the machine.

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 (10)

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 axially extended gear hobbing 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 depth of the groove (110) is greater than the depth of a tooth slot between adjacent gear teeth on the gear (100).

3. The 3D printing extruder gear structure according to claim 1, wherein the hobbing in the groove (110) is in one-to-one correspondence with the teeth on the peripheral surface of the gear (100).

4. 3D printing extruder gear structure according to any one of claims 1-3, wherein the shape of the groove (110) is arc-shaped, V-shaped or U-shaped.

5. The 3D printing extruder gear structure according to claim 4, wherein the shape of the groove (110) is a circular arc, and the circular arc shape of the groove (110) is adapted to the wire (200).

6. 3D printing extruder gear structure according to any one of claims 1-3, wherein the width of the groove (110) in the axial direction of the gear (100) is 1-4 mm.

7. The gear structure of the 3D printing extruder according to any one of claims 1-3, 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.

8. The 3D printing extruder gear structure according to any one of claims 1-3, wherein the angle of the hobbing in the groove (110) is 5 ° to 60 °, the tooth height is 0.1mm to 1mm, and the tooth tip width is 0.01mm to 0.3 mm.

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.

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