CN106142566B - A kind of rotatable switching 3D printing nozzle - Google Patents

Abstract

The invention discloses a rotatable and switchable 3D printing nozzle, which includes a hanger, a gear train rotatably arranged on the hanger, and a print head movably arranged on the hanger through a universal mechanism. The end is connected to the gear train through a swing bar device, and a motor driving the gear train is arranged in the swing bar device. The invention drives the planetary gear to rotate through the motor, and then drives the gear train mounting plate to rotate at a certain angle. The planetary gear of the gear train rotates around the sun gear, and the universal mechanism drives the printing head to rotate around the rotation axis, so that the other printing head is vertically When switching the print head, since the position of the previous print head is already the lowest point of the motion trajectory, the problem of collision between the print head and the printing material during the switch is eliminated. The structure is simple and the operation is convenient.

Description

A rotatable switchable 3D printing nozzle

technical field

The invention relates to a 3D printer print head, in particular to a rotatable and switchable 3D print print head.

Background technique

At present, in the printing process of the same kind of multi-print heads on the market, because the print heads are placed horizontally, there may be rubbing problems during the printing process, which will affect the printing quality.

Contents of the invention

The present invention aims to solve the problem of material rubbing caused by the switching of multiple print heads during the printing process, complete the switching between different print heads by means of the rotation of the planetary wheel and the transmission of the universal mechanism, and solve the problem that may occur during the printing process of ordinary multiple print heads. The problem of rubbing material on the print head.

The present invention adopts following technical scheme to realize:

A rotatable and switchable 3D printing nozzle, including a hanger, a gear train rotatably arranged on the hanger, and a print head movably arranged on the hanger through a universal mechanism, and the rear end of the print head is passed through a swing rod The device is connected with a gear train, and a motor for driving the gear train is arranged in the pendulum device.

Further, the gear train includes a zigzag gear train mounting plate, sun bevel gears, satellite bevel gears and planetary bevel gears meshed in sequence, the hanger is provided with stepped bosses, and the gear train mounting plate passes through The first bearing is rotatably mounted on the stepped boss, the sun bevel gear is set on the stepped boss by the rotation of the second gear stop screw, and the satellite bevel gear is rotated by the third gear stop screw The planetary bevel gear is fixedly connected to the rotating shaft of the motor, and the front end of the rotating shaft of the motor is connected to the gear train mounting plate through the second bearing and the first gear stop screw.

Further, the pendulum device includes a planetary pendulum for accommodating the motor, one end of the planetary pendulum is provided with an end cap connected by an end cap screw, and the other end is connected to the rear end of the printing head by a screw.

Further, the universal mechanism adopts a universal bearing, the outer ring of the universal bearing is fixed on the hanger, and the inner ring is connected to the printing head.

Further, the universal mechanism adopts a spherical hinge, and the spherical hinge includes a rotating ball and a ball seat, the ball seat is arranged on the hanger, and the rotating ball is connected to the printing head.

Further, the hanger is also provided with adjustment screws for fixing the axial position of the universal mechanism.

Compared with the prior art, when changing the print head, the present invention drives the planetary gear to rotate through the motor, and then drives the gear train mounting plate to rotate at a certain angle, the planetary gear of the gear train rotates around the sun gear, and the print head is driven to rotate around the sun gear through the universal mechanism The shaft rotates so that the other print head is placed horizontally. When switching the print head, since the position of the previous print head is already the lowest point of the motion trajectory, the problem of collision between the print head and the printing material during the switch is eliminated. The structure is simple and the operation is easy. convenient.

Description of drawings

Fig. 1 is a schematic front view of a rotatably switchable 3D printing nozzle according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a right side view of a rotatable and switchable 3D printing nozzle according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view along A-A in Fig. 2 .

Fig. 4 is a schematic diagram of the principle of rotation of each gear.

The picture shows: 1-wheel train mounting plate; 2-first bearing; 3-sun bevel gear; 4-satellite bevel gear; 5-second bearing; 6-planet bevel gear; 7-motor; 8-planet pendulum; 9‐universal mechanism; 10‐print head; 11‐adjusting screw; 12‐ball seat; 13‐screw; 14‐end cover; 15‐end cover screw; 16‐first gear limit screw; 17‐the first gear Second gear fixing screw; 18-limit screw of third gear; 19-boss; 20-hanger.

Detailed ways

The purpose of the present invention will be further described in detail through specific examples below, and the examples cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following examples.

As shown in Figures 1 to 3, a rotatable switchable 3D printing nozzle includes a hanger 11, a gear train that is rotatably set on the hanger 1, and is movably set on the hanger 20 through a universal mechanism 9. The print head 10, the rear end of the print head 10 is connected to the gear train through a swing rod device, the motor 7 driving the gear train is arranged in the swing rod device, and the hanger 20 plays a supporting role.

Specifically, the gear train includes a zigzag gear train mounting plate 1, a sun bevel gear 3, a satellite bevel gear 4 and a planetary bevel gear 6 meshed in sequence, and the hanger 20 is provided with a stepped boss 19, so The gear train mounting plate 1 described above is rotatably mounted on the stepped boss 19 through the first bearing 2, and the sun bevel gear 3 is arranged on the stepped boss 19 by rotating the second gear limit screw 17, so Said satellite bevel gear 4 is arranged on the gear train installation plate 1 by the rotation of the third gear stop screw 18, said planetary bevel gear 6 is fixedly connected with the rotating shaft of said motor 7, and the front end of said rotating shaft of said motor 7 passes through the first The second bearing 5 and the first gear limit screw 16 are connected to the gear train mounting plate 1 .

Specifically, the pendulum device includes a planetary pendulum 8 for accommodating the motor 7, one end of the planetary pendulum 8 is provided with an end cap 14 connected by an end cap screw 15, and the other end is connected to the printing plate by a screw 13. Head 10 rear end.

Specifically, the universal mechanism 9 adopts a spherical hinge, and the spherical hinge includes a rotating ball and a ball seat 12 , the ball seat 12 is arranged on the hanger 20 , and the rotating ball is connected to the printing head 10 .

Specifically, the hanger 20 is also provided with an adjusting screw 11 for fixing the axial position of the universal mechanism 9 to facilitate the installation and disassembly of the universal mechanism 9 .

In another embodiment of the present invention, the universal mechanism 9 adopts a universal bearing, the outer ring of the universal bearing is fixed on the hanger 20, the inner ring is connected to the print head 10, and the outer ring and the inner ring are connected to each other. Balls or rollers are provided.

The gear train of the described embodiment consists of three bevel planetary gears, the rotating planetary bevel gear 6 and the middle satellite bevel gear 4 which rotate around the sun bevel gear 3 . When changing the print head 10, the planetary bevel gear 6 is driven to rotate through the motor 7, and then the gear train mounting plate 1 is driven to rotate around the stepped boss 19 at a certain angle, and the planetary bevel gear 6 of the gear train is rotated around the sun bevel gear 3, and through the universal mechanism 9 drives the printing head 10 to rotate around the rotation axis, so that the other printing head 10 is placed horizontally. When the print head 10 is switched, since the position of the previous print head 10 is already at the lowest point of the movement trajectory, the problem of collision between the print head 10 and the printing material will not occur during the switch.

Regarding the directional effect of the planetary gear during the working process, that is, the direction remains unchanged during the revolution, the design requirements of the gear train can be deduced from mathematical analysis, such as the sun gear and the planetary gear should have the same number of teeth z and modulus m (that is, the diameter of the pitch circle) .

As shown in Figure 4, the brief introduction of the principle is as follows:

ω is the revolution angular velocity of C wheel

v _b =ω(r ₁ +r ₂ )

Point D is fixed v _d ＝0, the rotation angular velocity of wheel B

So v _e =2ω _b r ₂ =2ω(r ₁ +r ₂ )

v _c ＝ω(r ₁ +r ₃ +2r ₂ )

When v _e ＝v _c , the C wheel does not rotate (that is, the rotation angular velocity ω _b of the C wheel is zero), at this time r ₁ ＝r ₃

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (5)

1. A rotatable switchable 3D printing nozzle, characterized in that: it includes a hanger (20), a gear train that is rotatably arranged on the hanger (20), and is movably arranged on the hanger (20) through a universal mechanism (9). The print head (10) on the frame (20), the rear end of the print head (10) is connected to the gear train through a swing bar device, and the motor (7) driving the gear train is arranged in the swing bar device; The gear train includes a zigzag gear train mounting plate (1), a sun bevel gear (3), a satellite bevel gear (4) and a planetary bevel gear (6) meshed in sequence, and the hanger (20) is provided with The stepped boss (19), the gear train mounting plate (1) is rotatably mounted on the stepped boss (19) through the first bearing (2), and the sun bevel gear (3) is limited by the second gear The position screw (17) is set on the stepped boss (19) for rotation, and the satellite bevel gear (4) is set on the gear train mounting plate (1) for rotation through the third gear limit screw (18). The planetary bevel gear (6) is fixedly connected to the rotating shaft of the motor (7), and the front end of the rotating shaft of the motor (7) is connected to the gear train through the second bearing (5) and the first gear limit screw (16). Mounting plate (1). 2. The rotatable and switchable 3D printing nozzle according to claim 1, characterized in that: the pendulum device includes a planetary pendulum (8) for accommodating the motor (7), one end of the planetary pendulum (8) An end cover (14) connected by an end cover screw (15) is provided, and the other end is connected to the rear end of the print head (10) by a screw (13). 3. The rotatable and switchable 3D printing nozzle according to claim 1, characterized in that: the universal mechanism (9) adopts a universal bearing, and the outer ring of the universal bearing is fixed on the hanger (20), The inner ring is connected to the print head (10). 4. The rotatable and switchable 3D printing nozzle according to claim 1, characterized in that: the universal mechanism (9) adopts a spherical hinge, and the spherical hinge includes a rotating sphere and a ball seat (12), and the ball seat (12) is arranged on the hanger (20), and the rotating sphere is connected to the printing head (10). 5. The rotatable and switchable 3D printing nozzle according to claim 1, characterized in that: the hanger (20) is also provided with an adjustment screw (11) for fixing the axial position of the universal mechanism (9).