Spray head assembly and 3D printing equipment

Abstract

The utility model relates to the field of 3D printing, aims to solve the problem that a spray head assembly is easily clamped when an optical axis of existing 3D printing equipment is bent and deformed, and provides a spray head assembly and 3D printing equipment. The spray head assembly comprises a frame body, a first sleeve and an elastic piece. The frame body is provided with a first through hole. The first sleeve is used for being slidably arranged on the optical shaft in a sleeving mode. The first sleeve is matched with the first through hole, and a movable gap exists between the first sleeve and the first through hole so that the first sleeve can move in the plane perpendicular to the axis of the first through hole relative to the frame body. The elastic piece elastically abuts against the position between the frame body and the first sleeve and is used for elastically pressing the first sleeve against the hole face of the first through hole. The spray head assembly has the beneficial effects that the spray head assembly can adapt to optical axis bending deformation and is not prone to being clamped.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and more specifically, to a nozzle assembly and a 3D printing device. Background Art

[0002] Some 3D printing devices, such as 3D printing devices based on Fused Deposition Modeling (FDM) technology, have a nozzle assembly that can be slidably engaged with an optical axis and can be driven to move along the optical axis.

[0003] In some existing 3D printing devices, when the optical axis is bent and deformed, the sliding of the nozzle assembly is easily blocked, affecting the normal operation of the 3D printing device. Utility Model Content

[0004] The present application provides a nozzle assembly and a 3D printing device to solve the problem that the nozzle assembly of the existing 3D printing device is easily stuck when the optical axis is bent and deformed.

[0005] In a first aspect, the present application provides a nozzle assembly for a 3D printing device, and can be slidably arranged on an optical axis, the nozzle assembly comprising a frame, a first sleeve and an elastic member. The frame is provided with a first through hole. The first sleeve is used to be slidably sleeved on the optical axis; the first sleeve is matched with the first through hole, and there is a movable gap between the first sleeve and the first through hole to allow the first sleeve to move relative to the frame in a plane perpendicular to the axis of the first through hole. The elastic member elastically abuts between the frame and the first sleeve, and is used to elastically press the first sleeve against the hole surface of the first through hole.

[0006] When the mating optical axis is bent, the existing solution may cause the movement of the nozzle assembly to become stuck.

[0007] With the nozzle assembly of the present application, since there is a movable gap and an elastic member providing elastic support is provided between the frame and the first sleeve, the elastic member can maintain the relative position of the sleeve and the frame. If the above-mentioned optical axis bending phenomenon occurs, the frame and the first sleeve can be allowed to continue to move along the optical axis through compression or elongation deformation of the elastic member without being easily stuck.

[0008] In one possible implementation:

[0009] The frame is also provided with a second through hole, which is arranged parallel to and spaced from the first through hole. The nozzle assembly also includes a second sleeve, which is used to be slidably sleeved on another optical axis; the second sleeve is matched with the second through hole.

[0010] In one possible implementation:

[0011] The second sleeve is fixedly matched with the frame.

[0012] In one possible implementation:

[0013] The second sleeve and the first sleeve are arranged with a vertical interval, and the first sleeve is located above the second sleeve.

[0014] In one possible implementation:

[0015] The movable gap allows the first sleeve to move horizontally relative to the frame.

[0016] In one possible implementation:

[0017] The first through hole is an oblong hole extending in the horizontal direction, the outer peripheral surface of the sleeve is a cylindrical surface, and the diameter of the cylindrical surface is equal to the vertical height dimension of the oblong hole.

[0018] In one possible implementation:

[0019] The frame body includes a fixed block and a connecting block, and the connecting block is detachably connected to the fixed block. The fixed block has a first groove facing the horizontal direction, and the opening direction of the first groove is perpendicular to the axis of the first through hole. The connecting block has a second groove facing the horizontal direction, and the opening direction of the second groove is perpendicular to the axis of the first through hole, and the second groove and the first groove surround the first through hole. The elastic member abuts between the connecting block and the first sleeve.

[0020] In one possible implementation:

[0021] The connecting block is adjustably connected to the fixing block through an adjusting screw, and the adjusting screw can adjust the distance between the connecting block and the fixing block to adjust the length of the movable gap.

[0022] In one possible implementation:

[0023] The fixing block includes a transverse plate, a first side plate and a lower plate, wherein the first side plate is connected to the upper side of the transverse plate away from the connecting block, and a first slot is defined between the transverse plate and the first side plate; the lower plate is vertically connected to the lower side of one end of the transverse plate close to the connecting block. The connecting block includes a second side plate and a connecting plate, wherein the second side plate defines a second slot and is supported on the transverse plate, and the connecting plate is connected to the lower side plate and connected to the lower plate by an adjusting screw.

[0024] In a second aspect, the present application provides a 3D printing device, which includes an optical axis and a nozzle assembly, wherein the first sleeve is slidably sleeved on the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of a 3D printing device according to an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the structure of the nozzle assembly and the optical axis in the embodiment of the present application;

[0028] Figure 3 It is a schematic diagram of the structure of the nozzle assembly in the embodiment of the present application;

[0029] Figure 4 for Figure 3 A magnified image of point A;

[0030] Figure 5 for Figure 3 Expanded view of a portion of the structure.

[0031] Description of main component symbols:

[0032] 3D printing equipment 100

[0033] Base 101

[0034] Printing platform 102

[0035] Gantry 103

[0036] Displacement drive assembly 110

[0037] Optical axis 111

[0038] Nozzle assembly 10

[0039] Frame 11

[0040] First sleeve 12

[0041] Elastic member 13

[0042] Second sleeve 14

[0043] Fixed block 15

[0044] Connection block 16

[0045] Adjusting screw 17

[0046] Horizontal board 18

[0047] First side plate 19

[0048] Lower plate 20

[0049] Second side plate 21

[0050] Connecting plate 22

[0051] First through hole K1

[0052] The second through hole K2

[0053] Activity gap f1

[0054] First slot C1

[0055] Second slot C2 DETAILED DESCRIPTION

[0056] 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 of the embodiments.

[0057] 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 a centered element. 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 a centered element. 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 a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0059] 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.

[0060] Example

[0061] See also Figure 1 and Figure 2 , this embodiment provides a 3D printing device 100, for example, a 3D printing device 100 based on FDM technology.

[0062] The 3D printing device 100 includes a base 101 , a printing platform 102 , a gantry 103 , a nozzle assembly 10 and a displacement driving assembly 110 .

[0063] The printing platform 102 is movably mounted on the base 101 along the Y direction. The gantry 103 is fixedly connected to the base 101 and serves as the installation base of the displacement drive assembly 110. The displacement drive assembly 110 is connected to the nozzle assembly 10 in a transmission manner to drive the nozzle assembly 10 to move along the X direction or the Z direction. The displacement drive assembly 110 can adopt an existing XZ bidirectional drive assembly.

[0064] The displacement driving assembly 110 may include two optical axes 111 extending in the X direction, and the two optical axes 111 in the X direction are arranged vertically at intervals. The nozzle assembly 10 is slidably supported on the two optical axes 111 .

[0065] In this way, relative displacements in the X, Y and Z directions can occur between the nozzle assembly 10 and the printing platform 102 , so that the nozzle assembly 10 can print a three-dimensional print on the printing platform 102 .

[0066] In other embodiments, the movement directions of the printing platform 102 and the nozzle assembly 10 may also be in other forms, which are not limited here.

[0067] See also Figure 3 , Figure 4 and Figure 5 This embodiment provides a nozzle assembly 10, including a frame 11, a first sleeve 12, a second sleeve 14 and an elastic member 13.

[0068] The frame 11 is provided with a first through hole K1 and a second through hole K2 . The second through hole K2 and the first through hole K1 are arranged in parallel and spaced apart from each other. The spacing direction may be the Z direction of the 3D printing device 100 .

[0069] The first sleeve 12 is used to be slidably mounted on an optical axis 111, and the sliding direction can be the X direction of the 3D printing device 100. The first sleeve 12 is matched with the first through hole K1, and there is a movable gap f1 between the first sleeve 12 and the first through hole K1 to allow the first sleeve 12 to move relative to the frame 11 in a plane perpendicular to the axis of the first through hole K1 (i.e., the X direction). The elastic member 13 elastically abuts between the frame 11 and the first sleeve 12, and is used to elastically press the first sleeve 12 against the hole surface of the first through hole K1. The second sleeve 14 is used to be slidably mounted on another optical axis 111, and the second sleeve 14 is matched with the second through hole K2.

[0070] In this embodiment, the second sleeve 14 and the first sleeve 12 are spaced apart in the vertical direction (ie, the X direction), and the first sleeve 12 is located above the second sleeve 14. That is, the first sleeve 12 and the second sleeve 14 are respectively sleeved on two vertically spaced optical axes 111.

[0071] When the optical axis 111 matched with the first sleeve 12 is bent so that the two optical axes 111 are not parallel, the existing solution may cause the movement of the nozzle assembly 10 to become stuck.

[0072] With the nozzle assembly 10 in the present embodiment, since there is a movable gap f1 and an elastic member 13 for elastic support is provided between the frame 11 and the first sleeve 12, the elastic member 13 can maintain the relative position of the sleeve and the frame 11. If the above-mentioned bending of the optical axis 111 occurs, the frame 11 and the first sleeve 12 can be allowed to continue to move along the optical axis 111 through compression or elongation deformation of the elastic member 13 without being easily stuck.

[0073] In this embodiment, the movable gap f1 allows the first sleeve 12 to move in the horizontal direction (in this embodiment, the Y direction) relative to the frame 11. For example, the first through hole K1 is an oblong hole extending in the horizontal direction (in this embodiment, the Y direction), and the outer peripheral surface of the first sleeve 12 is a cylindrical surface, and the diameter of the cylindrical surface is equal to the vertical height dimension of the oblong hole.

[0074] In one embodiment, the frame 11 includes a fixed block 15 and a connecting block 16, and the connecting block 16 is detachably connected to the fixed block 15. The fixed block 15 has a first groove C1 facing the horizontal direction, and the opening direction of the first groove C1 (in this embodiment, the Y direction) is perpendicular to the axis of the first through hole K1. The connecting block 16 has a second groove C2 facing the horizontal direction, and the opening direction of the second groove C2 is perpendicular to the axis of the first through hole K1. The first through hole K1 is defined between the second groove C2 and the first groove C1. The elastic member 13 abuts between the connecting block 16 and the first sleeve 12. The first groove C1 and the second groove C2 can be roughly semicircular grooves, and the distance between the first groove C1 and the second groove C2 can be enlarged to form an oblong groove, which can be assembled to form a curved circle. In this embodiment, through the distance between the connecting block 16 and the fixed block 15, the first groove C1 and the second groove C2 and the space between them can form an oblong hole-shaped first through hole K1.

[0075] In this embodiment, the elastic member 13 may be a spring or a coil spring, which is not limited here.

[0076] In one embodiment, the connecting block 16 is adjustably connected to the fixing block 15 via an adjusting screw 17, and the adjusting screw 17 can adjust the distance between the connecting block 16 and the fixing block 15 to adjust the length of the movable gap f1. By adjusting the length of the movable gap f1, the range of movement of the first sleeve 12 relative to the frame 11 can be controlled.

[0077] Optionally, the fixed block 15 includes a transverse plate 18, a first side plate 19 and a lower plate 20, wherein the first side plate 19 is connected to the upper side of the transverse plate 18 away from the connecting block 16, and a first groove C1 is defined between the transverse plate 18 and the first side plate 19; the lower plate 20 is vertically connected to the lower side of the end of the transverse plate 18 close to the connecting block 16. The connecting block 16 includes a second side plate 21 and a connecting plate 22, wherein the second side plate 21 defines a second groove C2 and is supported on the transverse plate 18, and the connecting plate 22 is connected to the lower side plate 21 and is connected to the lower plate 20 by the adjusting screw 17. This structure facilitates the connection between the connecting block 16 and the fixed block 15 and the length adjustment of the movable gap f1.

[0078] In this embodiment, the second sleeve 14 is fixedly matched with the frame 11. For example, the diameter of the second through hole K2 is the same as the outer diameter of the second sleeve 14, and the second sleeve 14 is fixedly connected in the second through hole K2 by tight fit (such as interference fit) or other connection methods.

[0079] In other embodiments, the second sleeve 14 and the frame 11 may also adopt a connection structure like the first sleeve 12 and the frame 11, so that the second sleeve 14 can also move relative to the frame 11 in the second through hole K2 to adapt to the curved optical axis 111 without being easily stuck.

[0080] The above implementation modes 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 implementation modes, a person skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A nozzle assembly, used for a 3D printing device, and capable of being slidably arranged on an optical axis, characterized in that: The nozzle assembly comprises: The frame body is provided with a first through hole; A first sleeve, used to be slidably sleeved on the optical axis; the first sleeve is matched with the first through hole, and there is a movable gap between the first sleeve and the first through hole, so as to allow the first sleeve to move relative to the frame in a plane perpendicular to the axis of the first through hole; An elastic member is elastically pressed between the frame and the first sleeve, and is used for elastically pressing the first sleeve against the hole surface of the first through hole.

2. The nozzle assembly according to claim 1, characterized in that: The frame is further provided with a second through hole, and the second through hole and the second through hole are arranged in parallel and spaced apart; The nozzle assembly further includes a second sleeve, which is used to be slidably sleeved on another optical axis; the second sleeve is matched with the second through hole.

3. The nozzle assembly according to claim 2, characterized in that: The second sleeve is fixedly matched with the frame.

4. The nozzle assembly according to claim 2, characterized in that: The second sleeve and the first sleeve are arranged with a vertical interval, and the first sleeve is located above the second sleeve.

5. The nozzle assembly according to claim 1, characterized in that: The movable gap allows the first sleeve to move in a horizontal direction relative to the frame.

6. The nozzle assembly according to claim 5, characterized in that: The first through hole is an oblong hole extending in the horizontal direction, the outer peripheral surface of the first sleeve is a cylindrical surface, and the diameter of the cylindrical surface is equal to the vertical height dimension of the oblong hole.

7. The nozzle assembly according to claim 6, characterized in that: The frame body comprises a fixing block and a connecting block, wherein the connecting block is detachably connected to the fixing block; The fixing block has a first groove facing the horizontal direction, and the opening direction of the first groove is perpendicular to the axis of the first through hole; The connecting block has a second groove facing the horizontal direction, and the opening direction of the second groove is perpendicular to the axis of the first through hole, and the second groove and the first groove surround the first through hole; The elastic member abuts between the connecting block and the first sleeve.

8. The nozzle assembly according to claim 7, characterized in that: The connecting block is adjustably connected to the fixing block via an adjusting screw, and the adjusting screw can adjust the distance between the connecting block and the fixing block to adjust the length of the movable gap.

9. The nozzle assembly according to claim 8, characterized in that: The fixing block comprises a transverse plate, a first side plate and a lower plate, wherein the first side plate is connected to the upper side of the transverse plate away from the connecting block, and the first groove is defined between the transverse plate and the first side plate; the lower plate is vertically connected to the lower side of one end of the transverse plate close to the connecting block; The connecting block includes a second side plate and a connecting plate, wherein the second side plate defines the second slot and is supported on the transverse plate, and the connecting plate is connected below the second side plate and is connected to the lower plate by the adjusting screw.

10. A 3D printing device, characterized in that: include: Optical axis; The nozzle assembly according to any one of claims 1 to 9; Wherein, the first sleeve is slidably sleeved on the optical axis.

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