CN219191300U - SLA3D printer rotary type automatic blanking structure - Google Patents

Abstract

The utility model discloses a rotary automatic blanking structure of an SLA3D printer, which comprises a blanking mechanism, a first rotary device, a second rotary device and a driving mechanism, wherein the first rotary device and the second rotary device are correspondingly arranged on two sides of the blanking mechanism; the blanking mechanism comprises a scraper knife, two sides of the scraper knife are respectively fixed on corresponding driven parts positioned on the two sides, so that the driven parts can move to drive the scraper knife to turn over, when the blanking is needed, the scraper knife can rotate to a position where the knife face of the scraper knife is attached to the upper surface of the screen plate, and when the blanking is not needed, the scraper knife can rotate to a position where the movement of the scraper knife mechanism is not influenced. Compared with the prior art, the utility model has the advantages of convenient operation and high safety, and the automatic operation can avoid a plurality of defects of manual operation.

Description

SLA3D printer rotary type automatic blanking structure

Technical Field

The utility model relates to the technical field of SLA3D printing, in particular to a rotary automatic blanking structure of an SLA3D printer.

Background

The supporting layer must exist when the work piece is printed to the current SLA3D printer on the market, and the effect of supporting layer is the work piece with work piece and otter board keep apart, and need cut off the supporting layer when the unloading, will not influence the work piece surface like this. Therefore, when the workpiece is removed, the supporting layer is required to be shoveled off by a shovel blade, and the workpiece is taken down.

However, the manual feeding method causes the following disadvantages: the hardness of the supporting layer is high, so that the difficulty of the shovel piece is increased; (2) During the process of the shovel, the supporting layer scraps can be splashed into the printing cavity; (3) When a large workpiece is placed, if the supporting layer is at a position which is difficult to reach by hands, the difficulty of placing is increased; (4) In the shoveling process, the supporting layer is easy to remain on the screen plate, and the subsequent printing is affected.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a rotary automatic blanking structure of an SLA3D printer.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the rotary automatic blanking structure of the SLA3D printer comprises a blanking mechanism, a first rotary device and a second rotary device which are correspondingly arranged on two sides of the blanking mechanism, a driving mechanism for driving the first rotary device to rotate,

the driving mechanism drives the driving piece of the first rotating device to rotate so as to drive the driven piece to do circular motion;

the blanking mechanism comprises a shovel blade, two sides of the shovel blade are respectively fixed on corresponding driven parts positioned on the two sides, so that the driven parts can move to drive the shovel blade to turn over, when blanking is needed, the shovel blade rotates to a position where the blade surface of the shovel blade is attached to the upper surface of the screen plate, and when blanking is not needed, the shovel blade rotates to a position where the movement of the scraper mechanism is not influenced.

In some embodiments, the planetary gear structure comprises a gear ring, a sun gear, a plurality of planet gears, a planet carrier and a supporting plate, wherein the sun gear is a driving part, the plurality of planet gears are driven parts, the supporting plate is perpendicular to the mesh plate, the gear ring is fixed on one side surface of the supporting plate, the planet carrier is polygonal, the planet gears are rotatably arranged on all vertexes of the planet carrier around the sun gear, and the gear teeth of the plurality of planet gears are respectively meshed with the gear teeth on the inner side wall of the gear ring and the gear teeth of the sun gear, and the driving mechanism drives the sun gear to rotate so as to drive the plurality of planet gears to rotate and revolve around the sun gear.

In some embodiments, the planet carrier is a regular triangle, three planet wheels are respectively arranged on three vertexes of the regular triangle, and when the planet wheel connected with the shovel blade moves to the bottom of the gear ring, the blade surface of the shovel blade is attached to the upper surface of the screen plate.

In some embodiments, the shovel blade comprises the blade surface, a pair of first connecting rods vertically connected to two sides of the blade surface, and a pair of second connecting rods respectively horizontally connected to the other ends of the first connecting rods, wherein the pair of second connecting rods are fixedly connected with the corresponding planet gears.

In some embodiments, when the planet wheel connected with the scraper moves to the bottom of the gear ring, the front side planet wheel is fixedly connected with the scraper mechanism, the scraper mechanism comprises a scraper, a first fixing plate for fixing the scraper, and a pair of second fixing plates vertically connected to two ends of the first fixing plate, the outer side walls of the second fixing plates are fixedly connected with the corresponding planet wheels, the pair of second fixing plates are respectively and separately provided with a certain distance with the left side wall and the right side wall of the scraper, so that a sliding rail for the rotary automatic discharging structure to move in the process of scraping printing powder or shoveling workpieces is avoided, when the sun wheel rotates anticlockwise, the scraper mechanism is turned downwards to a position where the edge of the scraper faces downwards and is parallel to the screen plate, and then the discharging mechanism is turned upwards.

In some embodiments, when the planet wheel connected with the shovel blade moves to the bottom of the gear ring, the blade surface of the shovel blade is higher than the upper side of the scraper mechanism by a preset distance, so that the mesh plate can pass between the blade surface of the shovel blade and the upper side of the scraper mechanism.

In some embodiments, the drive mechanism is a motor.

In some embodiments, the second fixing plate located at the left side of the scraper is provided with a sensing piece, when the scraper is turned to a position where the knife edge faces downwards and is parallel to the screen plate, a proximity switch is arranged at a corresponding position on the outer side of the sensing piece, so that when the scraper is turned in place, the proximity switch sends a control signal to stop the motor.

In some embodiments, a first pointer in an L shape is disposed below the second connecting rod at the left side of the shovel blade, the short side of the first pointer faces the gear ring, the gear ring is provided with a second pointer extending rightward corresponding to the position where the shovel blade is attached to the upper surface of the screen, and when the blade surface of the shovel blade is attached to the upper surface of the screen, the needle tip of the first pointer is aligned with the needle tip of the second pointer.

In some embodiments, the Y-axis section of the blade surface of the shovel blade is a right triangle, the length of the shortest side is smaller than the minimum supporting height of the workpiece, and the included angle between the two long sides is 5-15 degrees.

The utility model has the beneficial effects that:

the rotary automatic blanking structure is rotated to the position where the blade surface of the shovel blade is attached to the upper surface of the screen plate when blanking is needed, and rotated to the position where the movement of the scraper mechanism is not affected when blanking is not needed, so that the rotary automatic blanking structure is convenient to operate, high in safety and capable of avoiding various defects of manual operation.

Drawings

Fig. 1 is a schematic diagram illustrating a state of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 2 is a partial enlarged view of fig. 1.

Fig. 3 is a schematic structural diagram of a first rotating device of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 4 is a schematic structural diagram of a shovel blade or a blanking mechanism of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 5 is a schematic structural diagram of a scraper mechanism of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 6 is a schematic diagram of a Y-axis section of a shovel blade of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 7 is a schematic diagram of a state two structure of a rotary automatic blanking structure of an SLA3D printer according to an embodiment of the present utility model.

Fig. 8 is a partial enlarged view of fig. 7.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front," "rear," "both ends," "one end," "another end," "one side," "another side," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood in detail by those skilled in the art.

The following describes the utility model in detail with reference to examples.

Referring to fig. 1-8, the utility model provides a rotary automatic blanking structure of an SLA3D printer, which comprises a blanking mechanism 1, a first rotary device 2 and a second rotary device 3 correspondingly arranged on two sides of the blanking mechanism, and a driving mechanism 4 for driving the first rotary device 2 to rotate. The first rotating device 2 and the second rotating device 3 have the same planetary gear structure, the planetary gear structure is provided with a driving part and a driven part, and the driving mechanism 4 drives the driving part of the first rotating device 2 to rotate so as to drive the driven part to do circular motion. The blanking mechanism 1 comprises a shovel blade 11, two sides of the shovel blade 11 are respectively fixed on corresponding driven parts positioned on two sides, so that the driven parts can move to drive the shovel blade 11 to turn over, when blanking is needed, the shovel blade is rotated to a position where the blade surface 111 of the shovel blade 11 is attached to the upper surface of the screen plate 5, and when blanking is not needed, the shovel blade is rotated to a position where the movement of the scraper mechanism 6 is not influenced. In a gear system comprising planetary gears, the transmission principle is different from that of a fixed-axis gear. Because of the planet carrier, three rotating shafts can be used for allowing power to be input/output, and a clutch or a brake can be used for limiting the rotation of one shaft when needed, and only two shafts are left for transmission. Thus, there may be various combinations of relationships between intermeshing gears, such as: (1) The power is input from the sun gear, output from the outer gear ring, and the planet carrier is locked through the mechanism; (2) The power is input from the sun gear, output from the planet carrier and the outer gear ring is locked; (3) The power is input from the planet carrier, output from the sun gear and the outer gear ring is locked; (4) The power is input from the planet carrier, output from the outer gear ring and the sun gear is locked; (5) The power is input from the outer gear ring, output from the planet carrier and the sun gear is locked; (6) Power is input from the outer gear, output from the sun gear, carrier lockup, etc. Thus, the driving member of the present application may be one or more of a sun gear, a planet carrier, and an outer ring gear, while the component driven by the driving member is a driven member.

In some embodiments, the planetary gear structure comprises a ring gear 21, a sun gear 22, a number of planet gears 23, a planet carrier 24, a support plate 25, the sun gear 22 being a driving member, the number of planet gears 23 being driven members. The support plate 25 is disposed perpendicular to the mesh plate 5, the ring gear 21 is fixed to one side surface of the support plate 25, and the carrier 24 is polygonal. The planetary gears 23 are rotatably arranged on each vertex of the planetary carrier 24 around the sun gear 22, the gear teeth of the planetary gears 23 are respectively meshed with the gear teeth on the inner side wall of the gear ring 21 and the gear teeth of the sun gear 22, and the driving mechanism 4 drives the sun gear 22 to rotate, so that the planetary gears 23 are driven to rotate and revolve around the sun gear 22.

In some embodiments, the planet carrier 24 is a regular triangle, the three planet wheels 23 are respectively disposed on three vertices of the regular triangle, and when the planet wheel 23 connected to the blade 11 moves to the bottom of the gear ring 21, the blade surface 111 of the blade 11 is attached to the upper surface of the mesh plate 5.

In some embodiments, the shovel blade 11 includes the blade surface 111, a pair of first connecting rods 112 vertically connected to two sides of the blade surface 111, and a pair of second connecting rods 113 horizontally connected to the other ends of the first connecting rods, where the pair of second connecting rods 113 are fixedly connected to the corresponding planetary gears 23.

In some embodiments, when the planet 23 connected to the blade 11 moves to the bottom of the gear ring 21, the front side of the planet 23 is fixedly connected with the blade mechanism 6, which includes a blade 61, a first fixing plate 62 for fixing the blade 61, and a pair of second fixing plates 63 vertically connected to two ends of the first fixing plate, where the outer side walls of the second fixing plates 63 are fixedly connected with the corresponding planet 23. The pair of second fixing plates 63 are respectively spaced from the left and right side walls of the scraper 61 to avoid sliding rails of the rotary automatic discharging structure moving in the process of scraping printing powder or shoveling off a workpiece. When the sun gear 22 rotates anticlockwise, the scraper mechanism 6 turns downwards to a position where the edge 64 of the scraper 61 faces downwards and is parallel to the screen 5, and the blanking mechanism 1 turns upwards accordingly.

In some embodiments, when the planet wheel 23 connected to the blade 11 moves to the bottom of the gear ring 21, the blade surface 111 of the blade 11 is higher than the upper side of the scraper mechanism 6 by a preset distance, so that the mesh plate 5 can pass between the blade surface 111 of the blade 11 and the upper side of the scraper mechanism 6.

In some embodiments, the drive mechanism 4 is a motor. It can be appreciated that the driving mechanism 4 of the present application may also be a conventional manual operation mechanism, and the sun gear 22 is driven to rotate by the hand-operated lever, which is not described herein again.

In some embodiments, a sensing piece 65 is disposed on the second fixing plate 63 at the left side of the scraper 61, and when the scraper 61 is turned to a position where the knife edge 64 faces downward and is parallel to the mesh plate 5, a proximity switch 66 is disposed at a corresponding position on the outer side of the sensing piece 65, so that when the scraper is turned in place, the proximity switch 66 sends a control signal to stop the motor.

In some embodiments, a first pointer 71 having an L shape is provided below the second connecting bar 113 located on the left side of the blade 11, with its short side facing the ring gear 21. The gear ring 21 is provided with a second pointer 72 extending rightward corresponding to the position where the scraper blade 11 is attached to the upper surface of the screen 5, and when the blade surface 111 of the scraper blade 11 is attached to the upper surface of the screen 5, the needle tip of the first pointer 71 is aligned with the needle tip of the second pointer 72.

In some embodiments, the Y-axis section of the blade surface 111 of the blade 11 is a right triangle, the length of the shortest side is smaller than the minimum supporting height of the workpiece, and the included angle between the two long sides is 5-15 °. Preferably, the angle between the two long sides is 10-13 degrees.

The working principle of the application is as follows: in the printing process, the laser scanning finishes one layer, the screen plate moves downwards one layer, the scraper moves to scrape the powder, and the process is repeated until the printing of the workpiece is finished. After printing, the workpiece needs to be removed, and the screen plate moves upwards to a blanking position. The planetary gear mechanism rotates 120 degrees to enable the shovel blade to rotate to be attached to the upper surface of the screen plate, the pointers are mechanically limited and used for detecting whether mechanical looseness or the situation that the rotating positions are not opposite, and if the situation occurs, the two pointers are not butted together. After the bonding, the supporting layer of the workpiece model is shoveled off by the movement of the shovel blade, and then the workpiece is picked up manually. The Y-axis section of the shovel blade is a right triangle, and the shortest side of the shovel blade is smaller than the minimum supporting height of the workpiece, so that the surface of the workpiece is not damaged. If the scraper needs to be cleaned, when residues are found on the lower surface of the scraper, the scraper can be rotated to rotate the surface of the scraper to the upper surface, and then the residues are gently hung by a blade.

The utility model has at least the following advantages: 1. the parallelism of the shovel blade and the screen plate can be adjusted and ensured through physical limit and mechanical limit; 2. the artificial participation in blanking is not needed, and the splashing of the supporting layer scraps is avoided; 3. because the whole shovel blade is used for shoveling the whole plane, dead angles which cannot be shoveled do not occur; 4. the lower surface of the scraper is beneficial to cleaning.

The embodiments in the above examples may be further combined or replaced, and the examples are merely illustrative of preferred embodiments of the present utility model and not intended to limit the spirit and scope of the present utility model, and various changes and modifications made by those skilled in the art to the technical solutions of the present utility model are included in the scope of the present utility model without departing from the design concept of the present utility model.

Claims (8)

1. The rotary automatic blanking structure of the SLA3D printer is characterized by comprising a blanking mechanism, a first rotary device and a second rotary device which are correspondingly arranged on two sides of the blanking mechanism, and a driving mechanism for driving the first rotary device to rotate;

the driving mechanism drives the driving piece of the first rotating device to rotate so as to drive the driven piece to do circular motion;

the blanking mechanism comprises a shovel blade, wherein two sides of the shovel blade are respectively fixed on corresponding driven parts positioned at two sides, so that the driven parts can move to drive the shovel blade to turn over, when blanking is required, the shovel blade rotates to a position where the blade surface of the shovel blade is attached to the upper surface of the screen plate, and when blanking is not required, the shovel blade rotates to a position where the movement of the scraper mechanism is not influenced;

the planetary gear structure comprises a gear ring, a sun gear, a plurality of planetary gears, a planetary carrier and a supporting plate, wherein the sun gear is a driving piece, the plurality of planetary gears are driven pieces, the supporting plate is perpendicular to the screen plate, the gear ring is fixed on one side surface of the supporting plate, the planetary carrier is polygonal, the plurality of planetary gears are rotatably arranged on all vertexes of the planetary carrier around the sun gear, gear teeth of the plurality of planetary gears are meshed with gear teeth on the inner side wall of the gear ring and gear teeth of the sun gear respectively, and the driving mechanism drives the sun gear to rotate, so that the plurality of planetary gears are driven to rotate and revolve around the sun gear;

when the planet wheel connected with the shovel blade moves to the bottom of the gear ring, the blade surface of the shovel blade is higher than the upper side of the scraper mechanism by a preset distance, so that the screen plate can pass through between the blade surface of the shovel blade and the upper side of the scraper mechanism.

2. The rotary automatic blanking structure of the SLA3D printer according to claim 1, wherein the planet carrier is a regular triangle, three planet wheels are respectively arranged on three vertexes of the regular triangle, and when the planet wheel connected with the shovel blade moves to the bottom of the gear ring, the blade surface of the shovel blade is attached to the upper surface of the screen plate.

3. The rotary automatic blanking structure of the SLA3D printer according to claim 2, wherein the shovel blade comprises a blade surface, a pair of first connecting rods vertically connected to two sides of the blade surface, and a pair of second connecting rods respectively horizontally connected to the other ends of the first connecting rods, and the pair of second connecting rods are fixedly connected with corresponding planetary gears.

4. The rotary automatic blanking structure of the SLA3D printer according to claim 3, wherein when the planet wheel connected with the scraper moves to the bottom of the gear ring, the front side of the planet wheel is fixedly connected with the scraper mechanism, the scraper mechanism comprises a scraper, a first fixing plate for fixing the scraper, a pair of second fixing plates vertically connected to two ends of the first fixing plate, the outer side walls of the second fixing plates are fixedly connected with the corresponding planet wheel, the pair of second fixing plates are respectively provided with a certain distance with the left side wall and the right side wall of the scraper, so that sliding rails of the rotary automatic blanking structure, which move in the process of scraping printing powder or shoveling workpieces, are avoided, when the sun wheel rotates anticlockwise, the scraper mechanism turns downwards to a position where the edge of the scraper faces downwards and is parallel to the screen plate, and the blanking mechanism turns upwards accordingly.

5. The SLA3D printer rotary automatic blanking structure of claim 4, wherein the driving mechanism is a motor.

6. The rotary automatic blanking structure of the SLA3D printer according to claim 5, wherein an induction piece is arranged on the second fixing plate at the left side of the scraper, and a proximity switch is arranged at the corresponding position on the outer side of the induction piece when the scraper is turned over to a position where the knife edge faces downwards and is parallel to the screen plate, so that when the scraper is turned over in place, the proximity switch sends a control signal to stop the motor.

7. The rotary automatic blanking structure of the SLA3D printer according to claim 6, wherein an L-shaped first pointer is arranged below the second connecting rod at the left side of the shovel blade, the short side of the first pointer faces the gear ring, a second pointer extending rightward is arranged at a position, corresponding to the position where the shovel blade is attached to the upper surface of the screen, of the gear ring, and when the blade surface of the shovel blade is attached to the upper surface of the screen, the needle tip of the first pointer is aligned with the needle tip of the second pointer.

8. The rotary automatic blanking structure of the SLA3D printer according to claim 1, wherein the Y-axis section of the cutter surface of the shovel cutter is a right triangle, the length of the shortest side is smaller than the minimum supporting height of a workpiece, and the included angle between the two long sides is 5-15 degrees.

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