Driving device of powder supply mechanism, powder supply mechanism and 3D printer

Abstract

The utility model discloses a driving device of a powder supply mechanism, the powder supply mechanism and a 3D printer, the driving device is applied to the technical field of additive manufacturing, the driving device comprises a powder spreading device, a rotating shaft and a triggering device, the powder spreading device is provided with an impact part reciprocating along with the powder spreading device, and the rotating shaft is used for driving a powder supply part to move; the powder supply component is used for conveying powder in the container to the designated position of the printing plane, a first blocking piece and a second blocking piece which are staggered in the axial direction and the radial direction of the rotating shaft further penetrate through one end of the rotating shaft, and the triggering device comprises a hit piece, a first triggering piece and a second triggering piece, the first trigger piece and the second trigger piece are respectively aligned with the first stop piece and the second stop piece and are arranged in tandem on the motion path of the impact part; the impact piece is also elastically connected with an elastic piece fixed on the motion path of the impact piece; the manufacturing cost of the 3D printer can be reduced, and the powder supply stability of the powder supply mechanism is improved.

Description

Technical Field

[0001] The present application relates to the field of additive manufacturing technology, and in particular to a driving device of a powder feeding mechanism, a powder feeding mechanism and a 3D printer. Background Art

[0002] Additive manufacturing, also known as 3D printing or rapid prototyping, is a method of creating objects by stacking materials layer by layer. Selective laser sintering, a sub-sector of additive manufacturing, has experienced rapid growth in recent years. The selective laser sintering process involves cyclically depositing layers of powder onto a print surface, then laser-sintering the layers to form a pattern and stacking them layer by layer to create a three-dimensional solid. In existing technologies, powder is first delivered to the starting position of the powder spreading device using a powder feed mechanism, where it is then spread using a roller or scraper. For top-feeding solutions, two powder feed mechanisms are typically located on either side of the print surface. Each feed mechanism requires a motor to rotate its internal powder delivery components to deposit powder onto a designated area. The powder spreading device also requires a motor to drive it. Consequently, the entire 3D printer requires multiple motors, making manufacturing costs difficult to control. Furthermore, the increased number of motors also increases the number of control signals. A malfunction in either of the two powder feed mechanisms can lead to powder shortages and printing failures. Therefore, the powder supply stability of existing 3D printers still needs to be improved. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a driving device for a powder feeding mechanism, a powder feeding mechanism, and a 3D printer, which can reduce the manufacturing cost of the 3D printer and improve the powder supply stability of the powder feeding mechanism.

[0004] In a first aspect, the present application proposes a driving device for a powder feeding mechanism, which is applied to a 3D printer, comprising:

[0005] A powder spreader, wherein the powder spreader is provided with an impact portion that reciprocates with the powder spreader;

[0006] A rotating shaft, the rotating shaft is used to drive the powder feeding component to move, and one end of the rotating shaft is penetrated by a first stopper and a second stopper staggered in the axial direction and the radial direction of the rotating shaft;

[0007] a trigger device comprising a striking member and a first trigger member and a second trigger member connected to the striking member, the first trigger member and the second trigger member being aligned with the first stop member and the second stop member, respectively, and being arranged one after the other on the motion path of the striking portion, the striking member being further elastically connected to an elastic member fixed on the motion path thereof;

[0008] The striking member is used to drive the first trigger member to pass over the first stop member without interference and enable the second trigger member to shift the second stop member to drive the rotating shaft to rotate along the first direction by a first angle when the striking part is collided with the striking part; the elastic member is used to drive the first trigger member to shift the first stop member to enable the rotating shaft to rotate along the first direction by a second angle when the striking part is separated from the striking member.

[0009] The driving device of the powder feeding mechanism according to the first aspect of the present application has at least the following beneficial effects: by arranging a first stopper and a second stopper which are staggered axially and radially on the rotating shaft of the powder feeding mechanism, and arranging a trigger device matching the first stopper and the second stopper, and configuring the trigger device as follows: when the powder spreader moves toward the rotating shaft, the impact part collides with the impacted part, thereby driving the first triggering part to pass over the first stopper without interference and causing the second triggering part to shift the second stopper to drive the rotating shaft to rotate a first angle along the first direction; when the impact part disengages from the impacted part, the elastic part drives the first triggering part to shift the first stopper to reset so that the rotating shaft continues to rotate a second angle along the first direction; the entire device uses the power of the powder spreader during movement to convert the horizontal reciprocating motion of the powder spreader into continuous rotation of the rotating shaft of the powder feeding mechanism in one direction. The power of the powder spreader and the powder feeding mechanism is shared, which can reduce the number of motors used, and the powder feeding mechanism adopts a purely mechanical design. Compared with the traditional electrically controlled powder feeding mechanism, the powder feeding stability is higher.

[0010] According to some embodiments of the present application, the trigger device also includes a linear bearing seat and a sliding rod sleeved on the linear bearing seat, a bracket is provided on the end of the sliding rod away from the linear bearing seat, the bracket has two separate support arms, the first trigger member and the second trigger member are respectively arranged on the two support arms, the first block member and the second block member are arranged between the first trigger member and the second trigger member, the impact member is arranged on the bracket, and the impact member is aligned with the impact part, the impact member is used to drive the first trigger member and the second trigger member to move during the collision with the impact part, one end of the elastic member is fixedly connected to the bracket, and the other end is fixed on the travel path of the bracket, and the elastic member is used to reset the first trigger member and the second trigger member.

[0011] According to some embodiments of the present application, waist-shaped holes are provided on both of the supporting arms, and the first trigger member and the second trigger member are respectively and movably adjustable disposed on the two waist-shaped holes.

[0012] According to some embodiments of the present application, the elastic member is a tension spring, one end of the tension spring is connected to the linear bearing seat, and the other end of the tension spring is connected to the bracket.

[0013] According to some embodiments of the present application, the elastic member is a compression spring, one end of which is connected to the bracket, and the other end of which is connected to any component in front of the travel direction of the bracket, and the component is the device housing or frame of the 3D printer.

[0014] According to some embodiments of the present application, the first trigger member and the second trigger member are an eccentric wheel and a blocking rod, respectively. Guide surfaces parallel to each other are provided at both ends of the first blocking member. The guide surfaces are used to guide the first blocking member to deflect when in contact with the eccentric wheel. When there is no interference movement between the eccentric wheel and the first blocking member, the first blocking member is in a horizontal state, and the eccentric wheel moves horizontally along the lower surface of the first blocking member.

[0015] According to some embodiments of the present application, the powder spreader includes a linear motion module and a scraper driven and connected to the linear motion module. The driving end of the linear motion module extends outward with a mounting seat, and a collision block is fixed on the mounting seat, and the collision block forms the collision part.

[0016] In a second aspect, the present application provides a powder feeding mechanism, which includes a driving device of the powder feeding mechanism of any embodiment of the first aspect, and the powder feeding mechanism further includes:

[0017] A groove is provided beside the printing plane, the top of the groove is flush with the printing plane, the rotating shaft is provided in the groove along the extension direction of the groove, a double-leaf flap is provided on the rotating shaft, the double-leaf flap can rotate along the inner wall of the groove, and the double-leaf flap is used to partially scrape the powder existing in the groove to the surface of one of the leaves of the double-leaf flap and flush with the printing plane.

[0018] According to the second aspect of the present application, the powder feeding mechanism has at least the following beneficial effects: by arranging a first stopper and a second stopper that are staggered axially and radially on the rotating shaft of the powder feeding mechanism, and arranging a trigger device matching the first stopper and the second stopper, and configuring the trigger device as follows: when the powder spreader moves toward the rotating shaft, the impact part collides with the impacted part, thereby driving the first trigger part to pass over the first stopper without interference and causing the second trigger part to shift the second stopper to drive the rotating shaft to rotate a first angle along the first direction; when the impact part is separated from the impacted part, the elastic part drives the first trigger part to shift the first stopper so that the rotating shaft continues to rotate a second angle along the first direction; the entire device uses the power of the powder spreader during movement to convert the horizontal reciprocating motion of the powder spreader into continuous rotation of the rotating shaft of the powder feeding mechanism in one direction. The power of the powder spreader and the powder feeding mechanism is shared, which can reduce the number of motors used, and the powder feeding mechanism adopts a purely mechanical design. Compared with the traditional electrically controlled powder feeding mechanism, the powder feeding stability is higher. Since the powder feeding mechanism has the driving device of the powder feeding mechanism of the first aspect, it has the same beneficial effects as the first aspect.

[0019] According to some embodiments of the present application, the powder supply mechanism is provided on each side of the printing plane, and the powder continuously flows in the grooves on both sides.

[0020] In a third aspect, the present application proposes a 3D printer, which includes a driving device of the powder supply mechanism described in any embodiment of the first aspect or a powder supply mechanism described in any embodiment of the second aspect.

[0021] According to the third aspect of the present application, the 3D printer has at least the following beneficial effects: by arranging a first stopper and a second stopper that are staggered axially and radially on the rotating shaft of the powder feeding mechanism, and arranging a trigger device that matches the first stopper and the second stopper, and configuring the trigger device so that: when the powder spreader moves toward the rotating shaft, the impact part collides with the impacted part, thereby driving the first trigger part to pass over the first stopper without interference and causing the second trigger part to shift the second stopper to drive the rotating shaft to rotate a first angle in the first direction; when the impact part is separated from the impacted part, the elastic part drives the first trigger part to shift the first stopper so that the rotating shaft continues to rotate a second angle in the first direction; the entire device uses the power of the powder spreader during movement to convert the horizontal reciprocating motion of the powder spreader into continuous rotation of the rotating shaft of the powder feeding mechanism in one direction. The power of the powder spreader and the powder feeding mechanism is shared, which can reduce the number of motors used, and the powder feeding mechanism adopts a purely mechanical design. Compared with the traditional electronically controlled powder feeding mechanism, the powder feeding stability is higher; since the 3D printer has a driving device or a powder feeding mechanism of any of the above two powder feeding mechanisms, it has the same beneficial effects as them.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Additional aspects and advantages of the present application will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a schematic diagram of the state of the driving device of the powder feeding mechanism when the powder spreader is located in the middle in some embodiments of the present application;

[0025] Figure 2 For some embodiments of this application Figure 1 A partial enlarged schematic diagram of part A;

[0026] Figure 3 This is a schematic diagram of the state of the driving device of the powder feeding mechanism when the powder spreader is located at the right limit position in some embodiments of the present application;

[0027] Figure 4 For some embodiments of this application Figure 3 A partial enlarged schematic diagram of part B.

[0028] The accompanying figures are as follows:

[0029] Powder spreader 100; impact part 110; rotating shaft 200; first stopper 210; guide surface 211; second stopper 220; linear bearing seat 300; slide bar 310; bracket 320; support arm 321; impact member 322; first trigger member 323; second trigger member 324; elastic member 325; waist-shaped hole 326; powder supply mechanism 400; groove 410; double-leaf flap 420; 3D printer 500; printing plane 510. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0031] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0032] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0034] Reference Figures 1 to 4On the one hand, the present application proposes a driving device of a powder feeding mechanism, which is applied to a 3D printer 500, which can be a 3D printer 500 that needs to spread powder, such as SLS (selective laser sintering) or SLM (selective laser melting), etc., but is not limited to this. The driving device of the powder feeding mechanism 400 includes: a powder spreader 100, a rotating shaft 200 and a trigger device. The powder spreader 100 is provided with an impact part 110 that reciprocates with the powder spreader 100. In some embodiments, the powder spreader 100 can be a linear motion or an arc motion. The movement mode of the powder spreader 100 is knowledge known in the art and is not explained in detail in this application; the rotating shaft 200 is used to install a powder feeding component and drive it to move. In some embodiments, the rotating shaft 200 drives the powder feeding component to rotate to achieve powder supply. One end of the rotating shaft 200 is penetrated by an axis along the rotating shaft 200 itself. The first stopper 210 and the second stopper 220 are staggered in the axial direction and radial direction, and the first stopper 210 and the second stopper 220 both have opposite ends protruding on the surface of the rotating shaft 200. The trigger device includes a striking member 322 that can move with the striking portion 110, and a first triggering member 323 and a second triggering member 324 fixedly connected to the striking member 322. The first triggering member 323 and the second triggering member 324 are aligned with the first stopper 210 and the second stopper 220 respectively. It can be understood that since the first stopper 210 and the second stopper 220 are staggered in the axial direction of the rotating shaft 200, the first triggering member 323 and the second triggering member 324 also need to be staggered in the horizontal direction, and the first triggering member 323 and the second triggering member 324 are arranged one after the other on the movement path of the striking portion 110. The striking member 322 is also connected to an elastic member 325.The impact piece 322 is used to be hit by the impact part 110 when the powder spreader 100 moves toward the rotating shaft 200, thereby driving the first trigger piece 323 and the second trigger piece 324 on the impact piece 322 to move toward the first stop piece 210 and the second stop piece 220 on the rotating shaft 200, and because the first trigger piece 323 is in front and closer to the rotating shaft 200, and the first stop piece 210 and the second stop piece 220 on the rotating shaft 200 are staggered in the radial direction, that is, the first stop piece 210 and the second stop piece 220 are staggered in the radial direction. There is an angle between the parts 220. When the powder spreading device 100 approaches the rotating shaft 200, the first stopper 210 is always in a horizontal state, and the first triggering member 323 passes under the first stopper 210 until the first triggering member 323 completely passes over the first stopper 210. At this time, the second triggering member 324 will collide with the second stopper 220, thereby pushing the rotating shaft 200 to rotate in the first direction by a first angle, and the first stopper 210 will also flip over a certain angle. At this time, the powder spreading device 100 is rotated in the first direction by a first angle. 00 has also reached the limit position. After obtaining powder from the powder supply mechanism 400, it can return to spread the powder on the printing surface 510. During the return process of the powder spreader 100, the impact part 110 will separate from the impacted part 322. At this time, the stretched or compressed elastic member 325 will push or pull the first trigger member 323 in the opposite direction. At this time, the first trigger member 323 will toggle the first stopper 210 along the first direction to the second angle until the first stopper 210 returns to the original non-interference state with the first trigger member 323. Subsequently, as the powder spreader 100 carries out the powder spreading action and continuously moves back and forth near the rotating shaft 200, the rotating shaft 200 can be continuously driven to rotate in one direction, thereby driving the powder supply mechanism 400 to work. It should be noted that the first direction can be clockwise or counterclockwise, depending on which direction the rotating shaft 200 requires for the powder supply mechanism 400 to supply powder. This is not limited in this application and can be reasonably set by those skilled in the art as needed.

[0035] Therefore, by setting the first stopper 210 and the second stopper 220 staggered in both axial and radial directions on the rotating shaft 200 of the powder feeding mechanism, and setting a trigger device matched with the first stopper 210 and the second stopper 220, and configuring the trigger device as follows: when the powder spreader 100 moves toward the rotating shaft 200, the impact part 110 collides with the impact part 322, thereby driving the first trigger part 323 to pass over the first stopper 210 without interference and making the second trigger part 324 to move the second stopper 220 to drive the rotating shaft 200 to rotate along the first direction by a first angle; when the impact part 110 is disengaged ... and the impact part 323 collides with the impact part 322 When the impact member 322 is struck, the elastic member 325 drives the first trigger member 323 to reset the first stop member 210 so that the rotating shaft 200 continues to rotate along the first direction to a second angle; the entire device uses the power of the powder spreader 100 during movement to convert the horizontal reciprocating motion of the powder spreader 100 into continuous rotation of the rotating shaft 200 of the powder feeding mechanism 400 in one direction. The power of the powder spreader 100 and the powder feeding mechanism 400 is shared, which can reduce the number of motors used, and the powder feeding mechanism 400 adopts a purely mechanical design. Compared with the traditional electrically controlled powder feeding mechanism 400, the powder supply stability is higher.

[0036] Reference Figures 1 to 4 It can be understood that the trigger device also includes a linear bearing seat 300 and a slide bar 310 sleeved on the linear bearing seat 300. In some embodiments, the linear bearing seat 300 is fixed to the frame of the 3D printer 500. Of course, it is not limited to being fixed thereto, but can also be fixed to other places, as long as it is ensured that the linear bearing seat 300 does not move with the impact part 110. A bracket 320 is provided on one end of the slide bar 310 away from the linear bearing seat 300. The bracket 320 has two separate support arms 321. The first trigger member 323 and the second trigger member 324 are respectively arranged at On the two arms 321, the first stopper 210 and the second stopper 220 are located between the first triggering member 323 and the second triggering member 324. The striking member 322 is arranged on the bracket 320, and the striking member 322 is aligned with the impact part 110. The striking member 322 is used to drive the first triggering member 323 and the second triggering member 324 to move during the collision process of the impacted part 110. One end of the elastic member 325 is fixedly connected to the bracket 320, and the other end is fixed on the travel path of the bracket 320. The elastic member 325 is used to reset the first triggering member 323 and the second triggering member 324.

[0037] Reference Figure 2Furthermore, both arms 321 are provided with waist-shaped holes 326. In some embodiments, the waist-shaped holes 326 are opened at the ends of the arms 321. For example, a horizontal waist-shaped hole 326 is opened at the ends of the arms 321 away from the bracket 320. The first trigger member 323 and the second trigger member 324 are respectively movably adjusted and arranged on the two arms 321 to adjust the distance between the first trigger member 323 and the second trigger member 324 relative to the first block 210 and the second block 220 when they are not triggered, thereby facilitating the assembly and debugging of this part of the structure.

[0038] Reference Figures 1 to 4 The first trigger 323 and the second trigger 324 are connected to each other, and the first trigger 323 and the second trigger 324 are connected to each other, so that the first trigger 323 and the second trigger 324 can be reset. 0, so that the first stopper 210 will continue to rotate a certain angle along the original rotation direction until it returns to a non-interference state with the first trigger member 323. In the process of completing the powder spreading action, the powder spreader 100 converts its own linear motion into the rotational motion of the rotating shaft 200 through the impact member 322 and the tension spring. The powder feeding mechanism 400 shares the motor power of the powder spreading device, saving the original two motors, and uses the tension spring to realize the relay of the two parts of the stroke of the rotating shaft 200. The full mechanical structure has higher stability, low replacement, maintenance and production costs, and is suitable for industrial applications.

[0039] Reference Figures 1 to 4 It is understood that in other embodiments, the elastic member 325 may also be a compression spring, one end of which is connected to the bracket 320, and the other end of which is connected to any component in front of the bracket 320 in the direction of travel, such as the device housing or frame of the 3D printer 500. This embodiment is a variation of the above-mentioned tension spring embodiment and has the same beneficial effects as the tension spring.

[0040] Reference Figures 1 to 4 It can be understood that the first trigger member 323 and the second trigger member 324 are an eccentric wheel and a blocking rod respectively, and guide surfaces 211 are provided at both ends of the first blocking member 210 that are parallel to each other. The guide surfaces 211 are used to guide the first blocking member 210 to deflect when in contact with the eccentric wheel. When there is no interference movement between the eccentric wheel and the first blocking member 210, the first blocking member 210 is in a horizontal state, and the eccentric wheel moves horizontally along the lower surface of the first blocking member 210.

[0041] Reference Figure 1It can be understood that the powder spreader 100 includes a linear motion module (not shown in the figure) and a scraper driven and connected to the linear motion module. The driving end of the linear motion module extends outward with a mounting seat (not shown in the figure), and a collision block is fixed on the mounting seat, and the collision block forms an collision part 110.

[0042] Reference Figure 1 and Figure 2 In the second aspect, the present application proposes a powder feeding mechanism 400, which includes a driving device of the powder feeding mechanism 400 of any one embodiment of the first aspect, and the powder feeding mechanism 400 also includes: a groove 410, the groove 410 is arranged next to the printing plane 510, the top of the groove 410 is flush with the printing plane 510, the rotating shaft 200 is arranged in the groove 410 along the extension direction of the groove 410, and a double-leaf flap 420 is provided on the rotating shaft 200, and the double-leaf flap 420 can rotate along the inner wall of the groove 410, and the double-leaf flap 420 is used to partially scrape the existing powder in the groove 410 to the surface of one of the leaves of the double-leaf flap 420 and flush with the printing plane 510.

[0043] Therefore, since the driving device of the powder feeding mechanism 400 of this aspect adopts the driving device of the powder feeding mechanism 400 of the first aspect, it has the same beneficial effects as the embodiment of the first aspect, that is, it shares a set of power with the powder spreader 100, saving the cost of two motors, and the pure mechanical structure makes the working stability better. In conjunction with the groove 410 and the double-leaf flap 420 arranged in the groove 410 and driven by the rotating shaft 200, the basic process of downward powder feeding is realized. Compared with the currently used gravity-falling upper powder feeding mechanism 400, this solution does not have such high requirements on the cleanliness of the powder, and is less likely to be stuck by impurities in the powder. The powder supply stability is higher.

[0044] Reference Figures 1 to 4 It can be understood that the powder supply mechanism 400 is provided with one part on each side of the printing plane 510, and the powder continuously circulates in the grooves 410 on both sides. In some embodiments, the powder supply mechanism 400 can be provided with one part on each side of the printing platform, corresponding to the traditional double-sided upper powder supply layout, using the groove 410 flush with the printing plane 510 to achieve temporary storage of powder, and we improve the power device of the double-leaf flap 420 in the groove 410, with the help of the driving device of the powder supply mechanism 400 of the first aspect, to borrow power from the powder spreader 100 and realize the rotation of its own rotating shaft 200, thereby saving the motor that was originally used to drive the powder supply mechanisms 400 on both sides.

[0045] Reference Figures 1 to 4In a third aspect, the present application proposes a 3D printer 500, which includes a driving device of the powder feeding mechanism 400 of the first aspect or the powder feeding mechanism 400 of the second aspect. The driving device of the powder feeding mechanism 400 is configured by providing a first stopper 210 and a second stopper 220 that are staggered in both axial and radial directions on the rotating shaft 200 of the powder feeding mechanism, and providing a trigger device that matches the first stopper 210 and the second stopper 220. The trigger device is configured such that when the powder spreader 100 moves toward the rotating shaft 200, the impact portion 110 collides with the impacted member 322, thereby driving the first trigger member 323 to pass over the first stopper 210 without interference and causing the second trigger member 324 to shift the second stopper 220 to drive the rotating shaft 200 to rotate along the first direction by a first angle. When the impact part 110 is separated from the impact part 322, the elastic part 325 drives the first trigger part 323 to move the first stop part 210 to make the rotating shaft 200 continue to rotate along the first direction to the second angle; the entire driving device uses the power of the powder spreader 100 during movement to convert the horizontal reciprocating motion of the powder spreader 100 into continuous rotation of the rotating shaft 200 of the powder feeding mechanism 400 in one direction. The power of the powder spreader 100 and the powder feeding mechanism 400 is shared, which can reduce the number of motors used, and the powder feeding mechanism 400 adopts a purely mechanical design. Compared with the traditional electrically controlled powder feeding mechanism 400, the powder feeding stability is higher. Therefore, the driving device equipped with the powder feeding mechanism or the 3D printer 500 of the powder feeding mechanism also has the same beneficial effects as the first aspect.

[0046] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A driving device for a powder feeding mechanism, used in a 3D printer, characterized in that: include: A powder spreader, wherein the powder spreader is provided with an impact portion that reciprocates with the powder spreader; A rotating shaft, the rotating shaft is used to drive the powder feeding component to move, and one end of the rotating shaft is penetrated by a first stopper and a second stopper staggered in the axial direction and the radial direction of the rotating shaft; a trigger device comprising a striking member and a first trigger member and a second trigger member connected to the striking member, the first trigger member and the second trigger member being aligned with the first stop member and the second stop member, respectively, and being arranged one after the other on the motion path of the striking portion, the striking member being further elastically connected to an elastic member fixed on the motion path thereof; The striking member is used to drive the first trigger member to pass over the first stop member without interference and enable the second trigger member to shift the second stop member to drive the rotating shaft to rotate along the first direction by a first angle when the striking part is collided with the striking part; the elastic member is used to drive the first trigger member to shift the first stop member to enable the rotating shaft to rotate along the first direction by a second angle when the striking part is separated from the striking member.

2. The driving device of the powder feeding mechanism according to claim 1, characterized in that: The trigger device also includes a linear bearing seat and a sliding rod sleeved on the linear bearing seat, a bracket is provided on the end of the sliding rod away from the linear bearing seat, the bracket has two separate support arms, the first trigger member and the second trigger member are respectively arranged on the two support arms, the first block member and the second block member are arranged between the first trigger member and the second trigger member, the impact member is arranged on the bracket, and the impact member is aligned with the impact part, the impact member is used to drive the first trigger member and the second trigger member to move during the collision with the impact part, one end of the elastic member is fixedly connected to the bracket, and the other end is fixed on the travel path of the bracket, and the elastic member is used to reset the first trigger member and the second trigger member.

3. The driving device of the powder feeding mechanism according to claim 2, characterized in that: Both arms are provided with waist-shaped holes, and the first trigger member and the second trigger member are respectively and movably adjustable arranged on the two waist-shaped holes.

4. The driving device of the powder feeding mechanism according to claim 2, characterized in that: The elastic member is a tension spring, one end of the tension spring is connected to the linear bearing seat, and the other end of the tension spring is connected to the bracket.

5. The driving device of the powder feeding mechanism according to claim 2, characterized in that: The elastic member is a compression spring, one end of which is connected to the bracket, and the other end of which is connected to any component in front of the bracket in the direction of travel, wherein the component is the device housing or frame of the 3D printer.

6. The driving device of the powder feeding mechanism according to claim 2, characterized in that: The first trigger member and the second trigger member are an eccentric wheel and a blocking rod respectively. Guide surfaces parallel to each other are provided at both ends of the first blocking member. The guide surfaces are used to guide the first blocking member to deflect when in contact with the eccentric wheel. When there is no interference movement between the eccentric wheel and the first blocking member, the first blocking member is in a horizontal state, and the eccentric wheel moves horizontally along the lower surface of the first blocking member.

7. The driving device of the powder feeding mechanism according to claim 1, characterized in that: The powder spreader includes a linear motion module and a scraper drivingly connected to the linear motion module. A mounting seat is extended outward from the driving end of the linear motion module. A collision block is fixed on the mounting seat, and the collision block forms the collision part.

8. A powder supply mechanism, characterized in that: A driving device comprising the powder feeding mechanism according to any one of claims 1 to 7, wherein the powder feeding mechanism further comprises: A groove, wherein the groove is arranged beside the printing plane, the top of the groove is flush with the printing plane, the rotating shaft is arranged in the groove along the extension direction of the groove, the powder supply component is a double-leaf flap, the double-leaf flap is fixed on the rotating shaft, the double-leaf flap can be rotated along the inner wall of the groove through the rotating shaft, and the double-leaf flap is used to partially scrape the powder already in the groove to the surface of one of the leaves of the double-leaf flap and flush with the printing plane.

9. The powder supply mechanism according to claim 8, characterized in that: The powder supply mechanism is provided with one part on each side of the printing plane, and the powder continuously flows in the grooves on both sides.

10. A 3D printer, characterized in that: The invention comprises a driving device of the powder feeding mechanism according to any one of claims 1 to 7 or a powder feeding mechanism according to any one of claims 8 to 9.

Images