Scraper replacement assembly for 3D printing equipment and 3D printing equipment

Abstract

The present application provides a scraper replacement assembly for a 3D printing device and a 3D printing device. The scraper replacement assembly for a 3D printing device includes: a scraper seat including a support frame and a first lever, the support frame being arranged along a first direction, the first lever being connected to the support frame, and the first lever extending along a second direction; a first scraper mechanism being detachably arranged on the support frame; a scraper mounting mechanism being movable relative to the scraper seat, including a mounting seat and a first positioning member, the mounting seat being provided with a mounting groove, the first positioning member being movably arranged on the mounting seat and partially arranged in the mounting groove, the first lever being arranged corresponding to the first positioning member. When the scraper mounting mechanism moves toward the scraper seat, and the first lever engages with the first positioning member, the first positioning member moves out of the mounting groove, and the first scraper mechanism engages with the mounting groove. When the scraper mounting mechanism moves away from the scraper seat, and the first lever separates from the first positioning member, the first positioning member abuts against the first scraper mechanism in the mounting groove, thereby enabling rapid installation and replacement of the scraper.

Description

Technical Field

[0001] The present application relates to the field of three-dimensional printing technology, and more specifically, to a scraper replacement assembly for a 3D printing device and a 3D printing device. Background Art

[0002] Metal 3D printing has broad application prospects in manufacturing, aerospace, healthcare, automotive, and other fields, enabling the manufacture and personalized production of complex structures. With the continuous development of metal 3D printing, its demand in the aerospace and military sectors has increased, and the volume of printed parts has increased, increasing printing time. During long printing periods, the soft scraper used to apply powder will continue to wear, seriously compromising the quality of the powder layer and, in turn, affecting the quality of the printed part. This impact is particularly prominent in the aerospace and military sectors, which require high precision and high performance. Any minor defect can result in substandard part performance and even pose a serious safety hazard. How to quickly replace or install a new scraper to ensure print quality and reduce downtime has become a pressing technical challenge. Summary of the Invention

[0003] This application provides a scraper replacement assembly for a 3D printing device and a 3D printing device to solve the above technical problems.

[0004] The embodiment of the present application is implemented as follows:

[0005] A scraper replacement assembly for 3D printing equipment includes a scraper seat, a first scraper mechanism, and a scraper mounting mechanism. The scraper seat includes a support frame and a first lever. The support frame is arranged along a first direction. The first lever is connected to the support frame and extends along a second direction. The first direction intersects with the second direction. The first scraper mechanism is detachably arranged on the support frame. The scraper mounting mechanism is movable relative to the scraper seat. The scraper mounting mechanism includes a mounting seat and a first positioning member. The mounting seat is provided with a mounting groove. The first positioning member is movably arranged on the mounting seat and partially provided in the mounting groove. The first lever is arranged corresponding to the first positioning member. When the scraper mounting mechanism moves toward the scraper seat, the first lever engages with the first positioning member, the first positioning member moves out of the mounting groove, and the first scraper mechanism engages with the mounting groove. When the scraper mounting mechanism moves away from the scraper seat, the first lever separates from the first positioning member, and the first positioning member abuts the first scraper mechanism in the mounting groove.

[0006] In this way, when the scraper mounting mechanism moves toward the scraper seat, the first scraper mechanism can be quickly installed into the mounting groove with the cooperation of the first lever and the first positioning member, and when it moves away from the scraper seat, the first positioning member can return to the mounting groove and support the first scraper mechanism, thereby completing the rapid installation and replacement of the scraper, which is conducive to ensuring the subsequent 3D printing quality, reducing the downtime caused by tool replacement, and improving printing efficiency.

[0007] In a possible implementation manner, the first shift lever is provided with a first matching groove, the first matching groove extends along the second direction, and when the first shift lever is matched with the first positioning member, the first positioning member is partially provided in the first matching groove.

[0008] In a possible implementation manner, a first guide portion is provided at one end of the first shifting rod away from the support frame, and a thickness of the guide portion gradually decreases along the second direction, and the guide portion is used to guide the first positioning member into the first matching groove.

[0009] In a possible embodiment: the mounting seat includes a first mounting member, a second mounting member, and a connecting plate, the first mounting member and the second mounting member are spaced apart along the first direction, the connecting plate connects the first mounting member and the second mounting member, the mounting groove includes a first mounting groove provided on the first mounting member and a second mounting groove provided on the second mounting member, the first mounting groove and the second mounting groove are respectively used to cooperate with the two ends of the first scraper mechanism along the first direction, the first positioning member is movably provided on the first mounting member, and the first positioning member is partially provided in the first mounting groove.

[0010] In one possible embodiment, the scraper holder further includes a second lever connected to the support frame and extending along the second direction, with the first lever and the second lever spaced apart along the first direction. The scraper mounting mechanism further includes a second positioning member, with the second lever correspondingly disposed, the second positioning member being movably mounted on the second mounting member and partially disposed in the second mounting slot.

[0011] In a possible implementation manner: the scraper replacement assembly further includes a detector, which is arranged on the scraper seat, and the detector is used to detect the position of the first scraper mechanism.

[0012] In one possible embodiment, the support frame includes a support plate and a support member, the support member being connected to the support plate and extending along the second direction. The first scraper mechanism includes a main body and a scraper, the scraper being mounted on the main body, the main body having a through hole defined along the second direction, and the support member being inserted into the through hole.

[0013] In a possible embodiment: the scraper replacement assembly also includes a second scraper mechanism, which cooperates with the mounting groove; when the scraper mounting mechanism moves toward the scraper seat and the first lever cooperates with the first positioning member, the first scraper mechanism presses against the second scraper mechanism, and the second scraper mechanism moves out of the mounting groove.

[0014] In a possible implementation manner, the scraper replacement assembly further includes a scraper recovery mechanism, and the scraper recovery mechanism is arranged below the scraper seat along the direction of gravity.

[0015] An embodiment of the present application further provides a 3D printing device, comprising the scraper replacement assembly for the 3D printing device and a printing chamber as described in the above embodiment, wherein the scraper replacement assembly is arranged in the printing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of a scraper replacement assembly for a 3D printing device according to an embodiment of the present application.

[0018] Figure 2 for Figure 1 The schematic diagram of the structure of the scraper replacement assembly shown in another direction.

[0019] Figure 3 for Figure 1 The schematic diagram of the cross-sectional structure of the scraper mechanism in the scraper replacement assembly along the III-III direction is shown.

[0020] Figure 4 for Figure 1 Partial exploded view of the scraper blade replacement assembly shown.

[0021] Figure 5 for Figure 4 Schematic diagram of the structure shown in another direction.

[0022] Figure 6 for Figure 1 An enlarged structural diagram of the first lever in the scraper replacement assembly is shown.

[0023] Figure 7 for Figure 1 The schematic diagram of the structure of the scraper installation mechanism in the scraper replacement assembly shown.

[0024] Figure 8 for Figure 7 An enlarged structural diagram of the first mounting member and the first positioning member in the scraper mounting mechanism is shown.

[0025] Figure 9 for Figure 8 Schematic diagram of the structure shown in another direction.

[0026] Figure 10 It is a structural schematic diagram of the scraper replacement component in one state.

[0027] Figure 11 It is a structural schematic diagram of the scraper replacement component in another state.

[0028] Figure 12 It is a structural schematic diagram of the scraper replacement component in another state.

[0029] Figure 13 FIG. 1 is a simplified schematic diagram of a 3D printing device in one embodiment.

[0030] Description of main component symbols:

[0031] Scraper replacement kit 100

[0032] Scraper seat 10

[0033] Support frame 11

[0034] Support plate 111

[0035] Support member 112

[0036] First lever 12

[0037] First matching groove 121

[0038] First guide portion 122

[0039] First boss 123

[0040] Second lever 13

[0041] Second matching groove 131

[0042] First scraper mechanism 20

[0043] Main body 21

[0044] First positioning groove 211

[0045] Through hole 212

[0046] Concave hole 213

[0047] protrusion 214

[0048] Scraper 22

[0049] Bump 221

[0050] Pressure plate 23

[0051] Second positioning groove 231

[0052] Scraper mounting mechanism 30

[0053] Mounting Block 31

[0054] First mounting member 311

[0055] First installation slot 3111

[0056] Groove 3112

[0057] Connecting part 3113

[0058] Guide surface 3114

[0059] Mounting hole 3115

[0060] Second mounting member 312

[0061] Second mounting slot 3121

[0062] Connecting plate 313

[0063] First positioning member 32

[0064] Positioning portion 321

[0065] Recessed portion 322

[0066] Second positioning member 33

[0067] Mounting slot 34

[0068] Second scraper mechanism 40

[0069] Detector 50

[0070] Mobile mechanism 60

[0071] Scraper recovery mechanism 70

[0072] 3D printing equipment 200

[0073] Print Room 201

[0074] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0076] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered therein. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be an element centered therein. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be an element centered therein. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the relevant listed items.

[0078] Some embodiments of the present application are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0079] See also Figures 1 to 13 The present embodiment provides a scraper replacement assembly 100 for a 3D printing device, comprising a scraper seat 10, a first scraper mechanism 20, and a scraper mounting mechanism 30. The scraper seat 10 comprises a support frame 11 and a first lever 12. The support frame 11 is arranged along a first direction A. The first lever 12 is connected to the support frame 11, and the first lever 12 extends along a second direction B. The first direction A intersects with the second direction B. The first scraper mechanism 20 is detachably arranged on the support frame 11. The scraper mounting mechanism 30 is movable relative to the scraper seat 10. The scraper mounting mechanism 30 comprises a mounting seat 31 and a first positioning member 32. The mounting seat 31 is provided with a mounting groove 34. The first positioning member 32 is movably arranged on the mounting seat 31 and partially arranged in the mounting groove 34. The first lever 12 is arranged corresponding to the first positioning member 32. The scraper mounting mechanism 30 moves toward the scraper holder 10. When the first lever 12 engages with the first positioning member 32, the first positioning member 32 moves out of the mounting slot 34, and the first scraper mechanism 20 engages with the mounting slot 34. The scraper mounting mechanism 30 moves away from the scraper holder 10. When the first lever 12 separates from the first positioning member 32, the first positioning member 32 abuts against the first scraper mechanism 20 in the mounting slot 34.

[0080] In this way, when the scraper mounting mechanism 30 moves toward the scraper seat 10, the first scraper mechanism 20 can be quickly installed into the mounting groove 34 with the cooperation of the first lever 12 and the first positioning member 32, and when moving away from the scraper seat 10, the first positioning member 32 can return to the mounting groove 34 and support the first scraper mechanism 20, completing the rapid installation and replacement of the scraper 22, which is beneficial to ensuring the subsequent 3D printing quality, reducing the downtime caused by tool replacement, and improving printing efficiency.

[0081] In some embodiments, the scraper replacement assembly 100 further includes a second scraper mechanism 40, which engages with the mounting slot 34. When the scraper mounting mechanism 30 moves toward the scraper holder 10 and the first lever 12 engages with the first positioning member 32, the first scraper mechanism 20 abuts against the second scraper mechanism 40, and the second scraper mechanism 40 moves out of the mounting slot 34.

[0082] Specifically, the second scraper mechanism 40 can be a new scraper mechanism or a scraper mechanism that needs to be replaced. In the initial state, the second scraper mechanism 40 is assembled into the mounting groove 34 of the scraper mounting mechanism 30, and the portion of the first positioning member 32 located in the mounting groove 34 abuts and positions the second scraper mechanism 40. When the scraper 22 needs to be replaced, the scraper mounting mechanism 30 can be moved toward the scraper seat 10, and the first lever 12 cooperates with the first positioning member 32 to move the first positioning member 32 out of the mounting groove 34, thereby releasing the positioning of the second scraper mechanism 40. As the scraper mounting mechanism 30 continues to move toward the scraper seat 10, the first scraper mechanism 20 can abut against the second scraper mechanism 40 along the second direction B, squeezing the second scraper mechanism 40 out of the mounting groove 34. The first scraper mechanism 20 is assembled into the mounting groove 34, and the second scraper mechanism 40 falls from the scraper mounting mechanism 30. Subsequently, the scraper mounting mechanism 30 carries the first scraper mechanism 20 away from the scraper holder 10. When the first positioning member 32 is separated from the first lever 12, the first positioning member 32 is reset and positions the first scraper mechanism 20 in the mounting groove 34. In this way, the scraper mechanism replacement operation is completed.

[0083] In the embodiment of the present application, the first positioning member 32 is positioned along the direction of gravity. The direction of gravity intersects the first direction A and the second direction B. When the first lever 12 engages with the first positioning member 32, it can drive the first positioning member 32 upward along the direction of gravity, thereby moving the first positioning member 32 out of the installation slot 34. When the first lever 12 separates from the first positioning member 32, the first positioning member 32 can fall back to its original position under the action of gravity.

[0084] In other embodiments, an elastic connection structure may be provided between the first positioning member 32 and the mounting seat 31. When the first lever 12 engages with the first positioning member 32, it can drive the first positioning member 32 to overcome the elastic force and move out of the mounting slot 34. When the first lever 12 separates from the first positioning member 32, the first positioning member 32 can return to its original position under the action of the elastic force.

[0085] See also Figures 1 to 5 In some embodiments, the support frame 11 includes a support plate 111 and a support member 112. The support member 112 is connected to the support plate 111 and extends along the second direction B. The first scraper mechanism 20 includes a main body 21 and a scraper 22. The scraper 22 is mounted on the main body 21. The main body 21 defines a through hole 212 along the second direction B. The support member 112 is inserted into the through hole 212. In this way, the first scraper mechanism 20 can be suspended on the support frame 11 through the interaction between the support member 112 and the through hole 212, ready for use.

[0086] In one embodiment, the support member 112 is a rod-shaped structure, one end of which is connected to the support plate 111 and the other end is suspended to be inserted into the main body 21 of the first scraper mechanism 20. The length of the support member 112 along the second direction B is at least 1 / 2 of the width of the main body 21 along the second direction B to ensure stable support for the first scraper mechanism 20. The length of the first lever 12 along the second direction B is greater than the length of the support member 112, so that the first positioning member 32 can be removed from the mounting slot 34 before the scraper mounting mechanism 30 engages with the first scraper mechanism 20.

[0087] In one embodiment, there are multiple support members 112 , which are spaced apart along the first direction A. The through holes 212 on the main body 21 are arranged in a one-to-one correspondence with the support members 112 to improve the installation stability of the first scraper mechanism 20 on the support frame 11 .

[0088] In some embodiments, the scraper replacement assembly 100 further includes a detector 50, which is disposed on the scraper holder 10. The detector 50 is used to detect the position of the first scraper mechanism 20. Specifically, the detector 50 is disposed on one side of the support plate 111 and includes, but is not limited to, a photoelectric detector 50, a pressure detector 50, a distance detector 50, and other components. The detector 50 is used to determine whether the first scraper mechanism 20 is installed on the support frame 11. The detector 50 can also send a detection signal to the control terminal, which moves the scraper mounting mechanism 30 based on the detection result.

[0089] In some embodiments, the first scraper mechanism 20 further includes a pressure plate 23. The scraper 22 is disposed at the bottom of the main body 21 along the direction of gravity and is located on the side of the main body 21 along the second direction B. The pressure plate 23 is mounted on the side of the main body 21 along the second direction B, with the scraper 22 partially sandwiched between the pressure plate 23 and the main body 21. The blade portion of the scraper 22 protrudes from the main body 21 and the pressure plate 23 along the direction of gravity. The direction of gravity is approximately the vertical direction of the angle shown in the figure, and intersects with the first direction A and the second direction B in each direction.

[0090] In one embodiment, there are two scrapers 22 symmetrically disposed on both sides of the main body 21 along the second direction B to improve the powder spreading quality of the scrapers 22 . The pressing plates 23 are disposed one-to-one with the scrapers 22 .

[0091] In one embodiment, the scraper 22 is provided with protrusions 221 on both sides along the second direction B, the main body 21 is provided with first positioning grooves 211 corresponding to the protrusions 221, and the pressure plate 23 is provided with second positioning grooves 231 corresponding to the protrusions 221. When the scraper 22 is sandwiched between the pressure plate 23 and the main body 21, the protrusions 221 on both sides of the scraper 22 are respectively installed in the corresponding first positioning grooves 211 and second positioning grooves 231, thereby positioning the scraper 22 in the installation position and improving the stability of the scraper 22 installation.

[0092] The structure of the second scraper mechanism 40 is substantially the same as that of the first scraper mechanism 20 , and will not be described in detail herein.

[0093] See also Figures 1 to 9 In some embodiments, the mounting seat 31 includes a first mounting member 311, a second mounting member 312, and a connecting plate 313. The first mounting member 311 and the second mounting member 312 are spaced apart along the first direction A. The connecting plate 313 connects the first mounting member 311 and the second mounting member 312. The mounting groove 34 includes a first mounting groove 3111 provided on the first mounting member 311 and a second mounting groove 3121 provided on the second mounting member 312. The first mounting groove 3111 and the second mounting groove 3121 are respectively used to cooperate with the two ends of the first scraper mechanism 20 along the first direction A. The first positioning member 32 is movably provided on the first mounting member 311, and the first positioning member 32 is partially provided in the first mounting groove 3111.

[0094] Specifically, the space between the connecting plate 313 and the first and second mounting members 311 and 312, as well as the first and second mounting grooves 3111 and 3121, collectively constitute the mounting groove 34. The upper portion of the main body 21 of the scraper mechanism is received in the mounting groove 34 to engage with the mounting base 31. Furthermore, the main body 21 is provided with protrusions 214 at both ends along the first direction A. These protrusions 214 engage with the first and second mounting grooves 3111 and 3121, respectively, to position the main body 21 relative to the mounting base 31.

[0095] In some embodiments, the two protrusions 214 are further provided with recessed holes 213 to respectively match the first positioning member 32 and the second positioning member 33. Specifically, when the first scraper mechanism 20 or the second scraper mechanism 40 is assembled to the mounting groove 34 of the mounting seat 31, the first positioning member 32 cooperates with the corresponding recessed hole 213 in the first mounting groove 3111, and the second positioning member 33 cooperates with the corresponding recessed hole 213 in the second mounting groove 3121, thereby achieving the installation and positioning of the main body 21 of the scraper mechanism.

[0096] like Figures 7 and 8 As shown, in one embodiment, a groove 3112 is provided on the side of the first mounting member 311 facing the second mounting member 312, and a connecting plate 313 is partially disposed in the groove 3112 to connect to the first mounting member 311. A connecting portion 3113 is provided on the side of the first mounting member 311 facing away from the second mounting member 312, which is used to connect to the moving mechanism 60 to drive the mounting seat 31 toward or away from the scraper seat 10. Along the second direction B, guide surfaces 3114 are provided at both ends of the bottom surface of the first mounting groove 3111. The guide surfaces 3114 are inclined relative to the bottom surface of the first mounting groove 3111, resulting in a chamfered structure at the opening of the first mounting groove 3111, which facilitates the scraper mechanism to enter or move out of the mounting seat 31.

[0097] In one embodiment, the first positioning member 32 is disposed on top of the first mounting member 311 along the direction of gravity. The first mounting member 311 defines a mounting hole 3115 along the direction of gravity, and the mounting hole 3115 communicates with the first mounting slot 3111. The first positioning member 32 is movably disposed in the mounting hole 3115. A positioning portion 321 is defined at the lower end of the first positioning member 32. The positioning portion 321 protrudes from the mounting hole 3115 and is positioned within the first mounting slot 3111 to engage with the recessed hole 213 on the main body 21 of the scraper mechanism. The upper end of the first positioning member 32 protrudes beyond the upper surface of the first positioning member 32 to engage with the first shift lever 12.

[0098] In an embodiment of the present application, the first positioning member 32 may be a spring pin. In other embodiments, the first positioning member 32 may also be a positioning structure such as a positioning bolt or a positioning pin, as long as the design requirements are met. The present application is not limited thereto.

[0099] See also Figure 6 、 Figure 8 and Figure 9 The first lever 12 defines a first matching groove 121 , and the first matching groove 121 extends along the second direction B. When the first lever 12 cooperates with the first positioning member 32 , the first positioning member 32 is partially disposed in the first matching groove 121 .

[0100] Specifically, a recessed portion 322 is provided at the upper end of the first positioning member 32. When the first positioning member 32 cooperates with the first lever 12, the inner wall of the recessed portion 322 cooperates with the inner wall of the first cooperating groove 121 to limit the displacement of the first positioning member 32 in the first cooperating groove 121, thereby preventing the positioning portion 321 of the first positioning member 32 from falling back to the first mounting groove 3111 before the scraper 22 is replaced.

[0101] In some embodiments, a first guide portion 122 is provided at the end of the first lever 12 away from the support frame 11. The thickness of the guide portion gradually decreases along the second direction B, and the guide portion is used to guide the first positioning member 32 into the first mating groove 121. In this way, when the scraper mounting mechanism 30 moves toward the mounting seat 31, the thinner front end portion of the first guide portion 122 can first be inserted into the recessed portion 322 at the top of the first positioning member 32. As the scraper mounting mechanism 30 moves, the first positioning member 32 slides along the first guide portion 122. The gradually increasing thickness of the first guide portion 122 can lift the first positioning member 32 during its movement, allowing the positioning portion 321 to move out of the first mounting groove 3111.

[0102] In some embodiments, the sidewalls of the first mating groove 121 are further provided with a first boss 123. When the first positioning member 32 engages with the first lever 12, the first boss 123 engages with the recessed portion 322, allowing the positioning portion 321 of the first positioning member 32 to move out of the first mounting groove 3111 while allowing the first positioning member 32 to remain within the first mating groove 121 for movement. The area corresponding to the first boss 123 and the first guide portion 122 also gradually decreases in thickness along the second direction B, thereby guiding the first positioning member 32 into the first mating groove 121 and lifting the first positioning member 32.

[0103] Please refer again Figure 1 、 Figure 2 and Figure 7In some embodiments, the scraper seat 10 further includes a second lever 13, which is connected to the support frame 11 and extends along the second direction B. The first lever 12 and the second lever 13 are spaced apart along the first direction A. The scraper mounting mechanism 30 further includes a second positioning member 33, which is correspondingly disposed with the second lever 13. The second positioning member 33 is movably disposed on the second mounting member 312, and the second positioning member 33 is partially disposed in the second mounting groove 3121. In this way, when the scraper mechanism is assembled on the mounting seat 31, the two ends can be positioned respectively by the first positioning member 32 and the second positioning member 33. The first and second positioning members 32 and 33 can also be used to unlock the scraper mechanism, thereby balancing the forces acting on the scraper mechanism, improving the movement stability of the scraper mechanism, and ensuring the success rate of the scraper changing operation.

[0104] In the embodiment of the present application, the second lever 13 is also provided with a second matching groove 131, a second guide portion, etc. The structure of the second lever 13 is substantially the same as that of the first lever 12, and will not be described in detail here.

[0105] The second mounting member 312 is also provided with a groove, a guide surface, a connecting portion, a mounting hole, etc. The structure of the second mounting member 312 is substantially the same as that of the first mounting member 311 and will not be described in detail here.

[0106] See also Figures 10 to 12 In some embodiments, the scraper replacement assembly 100 further includes a scraper recovery mechanism 70, which is disposed below the scraper holder 10 along the direction of gravity. When the first scraper mechanism 20 is engaged with the scraper mounting mechanism 30, the scraper recovery mechanism 70 is used to recover the second scraper mechanism 40 that has fallen from the scraper mounting mechanism 30.

[0107] See also Figure 13 In some embodiments, the scraper replacement assembly 100 further includes a moving mechanism 60, which is connected to the scraper mounting mechanism 30 and is configured to drive the scraper mounting mechanism 30 to move relative to the scraper holder 10. The moving mechanism 60 can also be communicatively connected to a control terminal for automated control. The moving mechanism 60 can also be a powder spreading moving device in a 3D printing device, capable of directly driving the scraper mounting mechanism 30 to move relative to the printing platform, allowing the scraper mechanism on the scraper mounting mechanism 30 to perform a powder spreading process on the printing platform.

[0108] In some embodiments, the moving mechanism 60 can also adjust the position of the scraper mounting mechanism 30 in the direction of gravity or the horizontal direction, so that the position of the first scraper mechanism 20 corresponds to the position of the second scraper mechanism 40, the position of the first lever 12 corresponds to the position of the first positioning member 32, and the position of the second lever 13 corresponds to the position of the second positioning member 33, to ensure that the blade changing process can proceed smoothly.

[0109] Please refer again Figures 10 to 12 , the operation process of the scraper replacement assembly 100 in an embodiment of the present application will be described. When the scraper 22 needs to be replaced, the scraper mounting mechanism 30 can be moved toward the scraper seat 10 under the drive of the moving mechanism 60, such as Figure 10 As shown. The first lever 12 first contacts the first positioning member 32. Under the action of the first guide portion 122, the first positioning member 32 is lifted upward by a certain distance and enters the first matching groove 121 on the first lever 12 along the second direction B. At this time, the positioning portion 321 at the lower end of the first positioning member 32 moves out of the first mounting groove 3111, releasing the positioning of the second scraper mechanism 40. The moving operation process is the same as that of the installation. Figure 11 As shown, the scraper mounting mechanism 30 continues to move toward the scraper seat 10, and the first scraper mechanism 20 on the scraper seat 10 presses against the second scraper mechanism 40, squeezing the second scraper mechanism 40 out of the scraper mounting mechanism 30, and the first scraper mechanism 20 enters the scraper mounting mechanism 30. The squeezed second scraper mechanism 40 falls to the scraper recovery mechanism 70. Figure 12 As shown, the scraper mounting mechanism 30 can be moved in the reverse direction again under the drive of the moving mechanism 60, away from the scraper seat 10, and the first scraper mechanism 20 moves synchronously with the scraper mounting mechanism 30. When the first positioning member 32 is separated from the first deflector 12, the first positioning member 32 falls back to its original position, and the positioning portion 321 at the lower end of the first positioning member 32 abuts against the first mounting groove 3111 to position the first scraper mechanism 20, completing the blade replacement process.

[0110] It is understood that in one embodiment, the scraper mounting mechanism 30 may not be provided with the second scraper mechanism 40, and may be in an unloaded state and directly docked with the first scraper mechanism 20. The operation process is substantially the same as above and will not be described in detail here.

[0111] See also Figure 13 The present application also provides a 3D printing device 200, comprising the scraper replacement assembly 100 and a print chamber 201 for use in 3D printing devices, as described in the above embodiments. The scraper replacement assembly 100 is disposed within the print chamber 201. When the scraper 22 needs to be replaced during printing, the moving mechanism 60 automatically drives the scraper mounting mechanism 30, carrying the old second scraper mechanism 40, toward the scraper holder 10 to replace the new first scraper mechanism 20. This quick and convenient blade replacement process helps reduce printing downtime and improve printing efficiency.

[0112] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent replacements of the technical solutions of the present application should not depart from the spirit and scope of the technical solutions of the present application.

Claims

1. A scraper replacement assembly for a 3D printing device, characterized in that: include: The scraper holder includes a support frame and a first shifting rod, wherein the support frame is arranged along a first direction, the first shifting rod is connected to the support frame, and the first shifting rod extends along a second direction; The first direction intersects the second direction; A first scraper mechanism is detachably provided on the support frame; The scraper mounting mechanism can be moved relative to the scraper seat, and the scraper mounting mechanism includes a mounting seat and a first positioning member, the mounting seat is provided with a mounting slot, the first positioning member is movably provided on the mounting seat and partially provided on the mounting slot, and the first shift rod is provided corresponding to the first positioning member; the mounting seat includes a first mounting member, a second mounting member, and a connecting plate, the first mounting member and the second mounting member are spaced apart along the first direction, the connecting plate connects the first mounting member and the second mounting member, the mounting slot includes a first mounting slot provided on the first mounting member and a second mounting slot provided on the second mounting member, the first mounting slot and the second mounting slot are respectively used to cooperate with the two ends of the first scraper mechanism along the first direction, the first positioning member is movably provided on the first mounting member, and the first positioning member is partially provided on the first mounting slot; The scraper mounting mechanism moves toward the scraper seat, and when the first lever cooperates with the first positioning member, the first positioning member moves out of the mounting slot, and the first scraper mechanism cooperates with the mounting slot; The scraper mounting mechanism moves away from the scraper seat, and when the first lever is separated from the first positioning member, the first positioning member abuts against the first scraper mechanism in the mounting groove; The first lever is provided with a first matching groove, the first matching groove extending along the second direction, and when the first lever is matched with the first positioning member, the first positioning member is partially disposed in the first matching groove; A first guide portion is provided at one end of the first shifting rod away from the support frame. The thickness of the guide portion gradually decreases along the second direction. The guide portion is used to guide the first positioning member into the first matching groove.

2. The scraper replacement assembly for 3D printing equipment according to claim 1, characterized in that: The scraper holder further includes a second shifting rod, the second shifting rod is connected to the support frame, and the second shifting rod extends along the second direction, and the first shifting rod and the second shifting rod are spaced apart along the first direction; The scraper mounting mechanism further includes a second positioning member, the second shifting rod is arranged corresponding to the second positioning member, the second positioning member is movably arranged on the second mounting member, and the second positioning member is partially arranged in the second mounting groove.

3. The scraper replacement assembly for 3D printing equipment according to claim 1, characterized in that: It also includes a detector, which is arranged on the scraper seat and is used to detect the position of the first scraper mechanism.

4. The scraper replacement assembly for 3D printing equipment according to claim 1, characterized in that: The support frame includes a support plate and a support member, the support member is connected to the support plate, and the support member extends along the second direction; The first scraper mechanism includes a main body and a scraper. The scraper is installed on the main body. The main body is provided with a through hole along the second direction. The support member is inserted into the through hole.

5. The scraper replacement assembly for 3D printing equipment according to claim 1, characterized in that: It also includes a second scraper mechanism, which cooperates with the mounting groove; when the scraper mounting mechanism moves toward the scraper seat and the first shift rod cooperates with the first positioning member, the first scraper mechanism presses against the second scraper mechanism, and the second scraper mechanism moves out of the mounting groove.

6. The scraper replacement assembly for 3D printing equipment according to claim 1, characterized in that: It also includes a scraper recovery mechanism, which is arranged below the scraper seat along the direction of gravity.

7. A 3D printing device, characterized in that: include: The scraper replacement assembly for 3D printing equipment according to any one of claims 1 to 6; and, A printing chamber, wherein the scraper replacement assembly is arranged in the printing chamber.

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