3D printer

Abstract

The utility model relates to the technical field of 3D printing, aims to solve the technical problem that some existing cleaning assemblies are low in excess material removing efficiency, and provides a 3D printer which comprises a bearing assembly, a transmission assembly and a pushing part. The bearing assembly is provided with a material receiving area, and the material receiving area is configured to receive excess materials extruded by the printing head. The transmission assembly is movably arranged on the bearing assembly. The pushing part is rotatably connected to the transmission assembly, the movement track area of the pushing part covers at least part of the material receiving area, and the pushing part is configured to rotate relative to the bearing assembly under the driving of the transmission assembly and push the remaining materials away from the bearing assembly. The device has the beneficial effect that the excess material removing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular, to a 3D printer. BACKGROUND

[0002] Some print heads need to completely extrude the consumables in the nozzles of the print heads when performing the actions of replacing consumables or stopping working. Some known print heads extrude the consumables onto a receiving plate, the consumables solidify on the receiving plate to form excess consumables, and then other structures are used to collect the excess consumables. In this way, the efficiency of removing the excess consumables is low. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a 3D printer to solve the technical problem of low efficiency of removing excess consumables of some existing cleaning assemblies.

[0004] The present application provides a 3D printer, which comprises a print head, and further comprises a bearing assembly, a transmission assembly and a pushing member. The bearing assembly is provided with a receiving area configured to receive excess consumables extruded by the print head. The transmission assembly is movably arranged on the bearing assembly. The pushing member is rotatably connected to the transmission assembly, the movement track area of the pushing member covers at least part of the receiving area, and the pushing member is configured to rotate relative to the bearing assembly under the driving of the transmission assembly and push the excess consumables away from the bearing assembly.

[0005] According to the 3D printer of the present application, when the print head needs to replace consumables or stop printing, the residual consumables in the print head are extruded through the nozzle, and the extruded consumables solidify on the bearing assembly to form excess consumables. Thereafter, the transmission assembly is triggered to move the pushing member, and the pushing member moves in the movement track area to move the excess consumables on the receiving area along the movement track area and finally push them away from the bearing assembly, thereby realizing the rapid removal of the excess consumables and improving the efficiency of removing the excess consumables. Moreover, the excess consumables formed by some consumables have a relatively large bonding force with the bearing assembly, and the movement of the pushing member driven by the triggered transmission assembly can provide sufficient force to the excess consumables to separate the excess consumables from the bearing assembly, thereby ensuring the removal effect of the excess consumables. In addition, since the pushing member and the bearing assembly are configured to have a relative rotating movement relationship, when the area of the movement track area of the pushing member is constant, the area of the receiving area of the bearing assembly can be further reduced, thereby reducing the occupied area of the bearing assembly, facilitating the miniaturization of the bearing assembly, and improving the space utilization rate of the 3D printer.

[0006] In a possible implementation manner:

[0007] The transmission assembly comprises a transmission member and a force receiving member, one end of the transmission member is in transmission connection with the force receiving member, the other end of the transmission member is connected with the pushing member, the force receiving member is configured to drive the transmission member to move relative to the bearing assembly under the pushing of the print head, thereby driving the pushing member to rotate relative to the bearing assembly.

[0008] In a possible implementation manner,

[0009] The force receiving member comprises a force receiving part and a first transmission part, the force receiving part is connected with the first transmission part, and the force receiving part is configured to drive the first transmission part to move under the driving of the print head. The transmission member comprises a second transmission part, the second transmission part is rotatably connected with the first transmission part, the second transmission part is connected with the pushing member, and the second transmission part is configured to rotate under the driving of the first transmission part to drive the pushing member to rotate relative to the bearing assembly.

[0010] In a possible implementation manner,

[0011] The first transmission part comprises a first rack, and the second transmission part comprises a first gear, the first rack is in meshing connection with the first gear.

[0012] In a possible implementation manner,

[0013] The pushing member is configured to selectively rotate between a first position and a second position, and a movement track area of the pushing member between the first position and the second position covers at least part of the material receiving area.

[0014] When the pushing member is in the first position, an included angle between the pushing member and a length direction of the first rack ranges from 50° to 120°, and when the pushing member is in the second position, the pushing member is substantially parallel to the length direction of the first rack.

[0015] In a possible implementation manner,

[0016] The number of teeth of the first gear is not less than three, and the number of teeth of the first rack is not less than ten.

[0017] In a possible implementation manner,

[0018] The module of the teeth of the first gear and the module of the teeth of the first rack are both 0.5 module, the tooth width of the teeth of the first gear and the tooth width of the teeth of the first rack are between 5 mm and 7 mm, and the diameter of the reference circle of the first gear is between 7 mm and 8 mm.

[0019] In a possible implementation manner,

[0020] The pushing member is configured to selectively rotate between a first position and a second position, a movement track area of the pushing member between the first position and the second position covering at least a part of the material receiving area. The 3D printer further comprises a reset member connected to the pushing member, the transmission assembly being configured to rotate to the first position under the driving of the printing head, and the reset member being configured to drive the pushing member to move from the first position towards the second position after the printing head is separated from the transmission assembly.

[0021] In a possible implementation manner:

[0022] The reset member comprises an elastic structure connected to the transmission assembly, the elastic structure being in a deformed state when the pushing member is in the first position and being configured to apply an elastic force to the transmission assembly, and the elastic structure being in a natural state when the pushing member is in the second position.

[0023] In a possible implementation manner:

[0024] The bearing assembly is provided with a clearance groove on a side of the bearing assembly close to the first direction, and the pushing member can rotate to correspond to an edge of the clearance groove to push the excess material away from the bearing assembly.

[0025] In a possible implementation manner:

[0026] The clearance groove comprises a first side edge and a second side edge, and the first side edge and the second side edge are arranged at an included angle;

[0027] The pushing member comprises a pushing plate and an extending plate, the pushing plate is in transmission connection with the transmission assembly, and the extending plate is connected to the pushing plate, the pushing plate is substantially parallel to the first side edge, and the extending plate is substantially parallel to the second side edge when the pushing member rotates to correspond to the clearance groove.

[0028] In a possible implementation manner:

[0029] The pushing member comprises a pushing plate and an extending plate, the pushing plate is in transmission connection with the transmission assembly, and the extending plate is connected to the pushing plate, at least a part of the extending plate is located outside the bearing assembly on a movement track area of the pushing member.

[0030] In a possible implementation manner:

[0031] The pushing member is configured to selectively move between a first position and a second position, and a movement track area of the pushing member between the first position and the second position covers at least a part of the material receiving area. The extending plate is bently connected to the pushing plate, when the pushing member is in the first position, the pushing plate is substantially parallel to the side edge of the bearing assembly, and the extending plate extends to the outside of the bearing assembly in a direction away from the bearing assembly.

[0032] In one possible implementation,

[0033] The bearing assembly comprises a material receiving plate and a mounting plate, the material receiving plate is located at one side of the mounting plate, the material receiving area is provided on the material receiving plate, the transmission assembly is provided on the mounting plate, the pushing member comprises a first connecting plate and a pushing plate, the first connecting plate is connected to the transmission assembly, and the pushing plate is located on the material receiving plate and is configured to push the excess material away from the material receiving plate under the driving of the first connecting plate.

[0034] In one possible implementation,

[0035] The bearing assembly further comprises an adapter plate, one side of the adapter plate is connected to the material receiving plate, and the other side of the adapter plate is connected to the mounting plate, the adapter plate is provided with an avoiding hole, the first connecting plate passes through the avoiding hole and is connected to the transmission assembly, the pushing plate is connected to the side of the first connecting plate extending out of the avoiding hole, the plate surface of the pushing plate intersects with the plate surface of the material receiving plate, and the avoiding hole is configured to limit the movement limit position of the first connecting plate. BRIEF DESCRIPTION OF DRAWINGS

[0036] 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 as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0037] Figure 1 It is a structural schematic diagram of a 3D printer of an embodiment of the present application.

[0038] Figure 2 It is a structural schematic diagram of a part of a 3D printer of an embodiment of the present application.

[0039] Figure 3 It is a structural schematic diagram of a bearing assembly, a transmission assembly and a pushing member of an embodiment of the present application.

[0040] Figure 4Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0041] Figure 5 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0042] Figure 6 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0043] Figure 7 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0044] Figure 8 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0045] Figure 9 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0046] Figure 10 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0047] Figure 11 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0048] Figure 12 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0049] Figure 13 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0050] Figure 14 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0051] Figure 15 Structure diagram of the bearing assembly, transmission assembly and pusher of another embodiment of the present application.

[0052] Main element symbol explanation:

[0053] 3D printer 200

[0054] Bearing assembly 10

[0055] Material receiving plate 11

[0056] Mounting plate 12

[0057] Adapter plate 13

[0058] Transmission assembly 20

[0059] Transmission member 21

[0060] Second transmission part 211

[0061] First gear 2111

[0062] Connecting part 212

[0063] Force receiving member 22

[0064] First transmission part 221

[0065] First rack 2211

[0066] Force receiving part 222

[0067] Mounting block 223

[0068] Pushing member 30

[0069] Pushing plate 31

[0070] Extension plate 32

[0071] First plate segment 321

[0072] Second plate segment 322

[0073] First connecting plate 33

[0074] Second connecting plate 34

[0075] Resetting member 40

[0076] Base member 50

[0077] Top wall 51

[0078] Surrounding wall 52

[0079] Connecting wall 53

[0080] Limiting protrusion 54

[0081] Mounting column 55

[0082] First fastener 62

[0083] Second fastener 61

[0084] First edge L1

[0085] Second edge L2

[0086] Third edge L3

[0087] Avoidance groove C1

[0088] Limiting groove C2

[0089] First guide hole K1

[0090] Second guide hole K2

[0091] Avoidance hole K3

[0092] First hole segment K31

[0093] Second hole segment K32

[0094] Connecting hole K4

[0095] Limiting hole K5

[0096] Connecting hole K6

[0097] Avoidance groove K7

[0098] Material receiving area Q1

[0099] Motion trajectory area Q2

[0100] Accommodation cavity Q3

[0101] First sub-cavity Q31

[0102] Second sub-cavity Q32

[0103] Base 201

[0104] Frame 202

[0105] X-axis drive assembly 203

[0106] Y-axis drive assembly 204

[0107] Z-axis drive assembly 205

[0108] Print head 206

[0109] Nozzle 207

[0110] Molding platform 208

[0111] Excess material recycling position 209

[0112] First direction X

[0113] Second direction Y

[0114] Third direction Z

[0115] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0116] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application.

[0117] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. When an element is referred to as being "positioned on" another element, it can be directly on the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for illustration only and do not limit the position of the element.

[0118] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0119] Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments can be combined with each other in the case of no conflict.

[0120] Referring to Figure 1 The present embodiment provides a 3D printer 200, for example, a 3D printer 200 based on FDM technology.

[0121] The 3D printer 200 includes a base 201, a frame 202, an X-axis drive assembly 203, a Y-axis drive assembly 204, a Z-axis drive assembly 205, a print head 206, a forming platform 208, a bearing assembly 10, a transmission assembly 20 and a pusher 30.

[0122] The frame 202 is fixedly connected to the base 201. The Z-axis drive assembly 205 is connected to the frame 202, the X-axis drive assembly 203 is connected to the Z-axis drive assembly 205, and the print head 206 is connected to the X-axis drive assembly 203. The print head 206 is provided with a nozzle 207 for extruding a consumable. The Y-axis drive assembly 204 is connected to the base 201, and the Y-axis drive assembly 204 is drivingly connected to the forming platform 208.

[0123] In this way, the relative displacement between the print head 206 and the forming platform 208 in the first direction X, the second direction Y and the third direction Z can occur, so that the print head 206 can extrude the consumable on the forming platform 208 and print a three-dimensional printed part.

[0124] In other embodiments, the movable directions of the forming platform 208 and the print head 206 can also take other forms, which are not limited herein. For example, the Z-axis drive assembly 205 can be arranged on the base 201 and connected with the forming platform 208. The print head 206 is connected with the frame 202 through the bidirectional driving structure of the first direction X and the second direction Y composed of the X-axis drive assembly 203 and the Y-axis drive assembly 204.

[0125] The 3D printer 200 is also provided with a surplus material recycling position 209, which is located on one side of the bearing assembly 10. The surplus material recycling position 209 is used to receive the surplus material pushed out of the bearing assembly 10 by the pushing member 30. The surplus material recycling position 209 can be provided with a surplus material recycling device, which can be configured to guide the surplus material to move to the outside of the 3D printer 200, thereby achieving efficient surplus material recycling.

[0126] The bearing assembly 10 is connected with the frame 202 and is configured to bear the surplus material extruded by the print head 206 and push the surplus material out to the surplus material recycling position 209.

[0127] In some embodiments, referring to Figure 1 , the frame 202 includes a cross beam and two upright columns spaced apart along the first direction X, and the cross beam is connected between the two upright columns. The two upright columns are respectively provided with a Z-axis drive assembly 205. The bearing assembly 10 is connected with one of the Z-axis drive assemblies 205, so that the Z-axis drive assembly 205 can drive the bearing assembly 10 and the X-axis drive assembly 203 to move synchronously along the third direction Z, so that the print head 206 only needs to move along the first direction X to reach the bearing assembly 10 and perform the action of extruding surplus material, thereby further improving the efficiency of surplus material recycling.

[0128] Referring to Figure 2 and Figure 3 , the bearing assembly 10 is provided with a material receiving area Q1, which is configured to receive the surplus material extruded by the nozzle 207. The transmission assembly 20 is movably arranged on the bearing assembly 10. The pushing member 30 is rotatably connected with the transmission assembly 20, and the movement track area Q2 of the pushing member 30 covers the material receiving area Q1. The pushing member 30 is configured to rotate relative to the bearing assembly 10 under the driving of the transmission assembly 20 and push the surplus material away from the bearing assembly 10.

[0129] When the print head 206 needs to be replaced with consumables or stop printing, the print head 206 moves above the receiving area Q1 along the third direction Z, and the residual consumables in the print head 206 are extruded through the nozzle 207, and the extruded consumables are solidified on the bearing assembly 10 to form the excess material. Thereafter, the transmission assembly 20 is triggered, and the pusher 30 is driven to rotate relative to the bearing assembly 10. During the rotation of the pusher 30 in the movement track area Q2, the excess material on the receiving area Q1 can be moved along the movement track area Q2, and finally pushed away from the bearing assembly 10, thereby realizing the rapid removal of the excess material and improving the removal efficiency of the excess material.

[0130] In addition, since the pusher 30 and the bearing assembly 10 are configured to have a relative rotation relationship, when the area of the movement track area Q2 of the pusher 30 is constant, the area of the receiving area Q1 of the bearing assembly 10 can be further reduced, thereby reducing the occupied area of the bearing assembly 10, facilitating the miniaturization of the bearing assembly 10, and improving the space utilization rate in the 3D printer 200.

[0131] In addition, since the pusher 30 and the bearing assembly 10 are configured to have a relative rotation relationship, when the area of the movement track area Q2 of the pusher 30 is constant, the area of the receiving area Q1 of the bearing assembly 10 can be further reduced, thereby reducing the occupied area of the bearing assembly 10, facilitating the miniaturization of the bearing assembly 10, and improving the space utilization rate in the 3D printer 200.

[0132] In some embodiments, referring to Figure 5 The transmission assembly 20 includes a transmission member 21 and a force receiving member 22. One end of the transmission member 21 is in transmission connection with the force receiving member 22, and the other end of the transmission member 21 is connected with the pusher 30. The force receiving member 22 is configured to drive the transmission member 21 to move relative to the bearing assembly 10 under the push of the print head 206, thereby driving the pusher 30 to rotate relative to the bearing assembly 10.

[0133] The movement of the print head 206 can drive the pusher 30 to rotate relative to the bearing assembly 10, thereby pushing the excess material away. In this way, it is not necessary to separately drive the pusher 30 to rotate by using a motor or other driving structure, thereby reducing the cost of the 3D printer 200, and it is not necessary to additionally detect the material ejection action of the print head 206 by using a detection element, thereby reducing the control cost. Of course, in other embodiments, the transmission assembly 20 can be configured as a motor or other driving structure, or the bearing assembly 10 can be movably connected to the frame 202. By controlling the movement of the bearing assembly 10 relative to the frame 202, the force receiving member 22 can collide with the frame 202, thereby realizing the movement of the pusher 30 relative to the bearing assembly 10. Therefore, there are various ways to drive the pusher 30 to rotate by using the transmission assembly 20, which are not limited in the present embodiment.

[0134] In some embodiments, referring to Figure 5The force receiving member 22 comprises a force receiving portion 222 and a first transmission portion 221. The force receiving portion 222 is connected to the first transmission portion 221, and is configured to drive the first transmission portion 221 to move under the driving of the print head 206. The transmission member 21 comprises a second transmission portion 211 rotatably connected to the first transmission portion 221, and the second transmission portion 211 is connected to the pushing member 30. The second transmission portion 211 is configured to rotate under the driving of the first transmission portion 221, so as to drive the pushing member 30 to rotate relative to the bearing assembly 10.

[0135] In some embodiments, referring to Figure 5 The first transmission portion 221 is a first rack 2211, and the second transmission portion 211 is a first gear 2111. The first gear 2111 is engaged with the first rack 2211, one end of the pushing member 30 is fixedly connected to the first gear 2111, and the other end extends above the bearing assembly 10. The print head 206 moves along the first direction X under the driving of the X-axis driving assembly 203, so as to drive the first rack 2211 to move along the first direction X, and in turn drive the first gear 2111 to rotate, thereby realizing the rotation of the pushing member 30 relative to the bearing assembly 10. The sector-shaped area in which the pushing member 30 rotates relative to the bearing assembly 10 is the movement track area Q2.

[0136] In some embodiments, the first gear 2111 is provided with a plurality of teeth on the side facing the first rack 2211, and the side of the first gear 2111 away from the first rack 2211 is a flat surface. In this way, the size of the first gear 2111 along the second direction Y can be reduced, thereby further reducing the size of the force receiving member 22 along the second direction Y, and improving the internal space utilization of the 3D printer 200.

[0137] In another embodiment, the first transmission portion 221 and the second transmission portion 211 are both synchronous gears, and the two synchronous gears are connected through a synchronous belt. The second transmission portion 211 is fixedly connected to one end of the pushing member 30. The first transmission portion 221 further comprises a swing arm connected to the first transmission portion 221. The print head 206 moves along the first direction X under the driving of the X-axis driving assembly 203, so as to drive the swing arm to rotate, thereby driving the second transmission portion 211 to rotate through the first transmission portion 221 and the synchronous belt, and finally realizing the rotation of the pushing member 30 relative to the bearing assembly 10.

[0138] In another embodiment, the first transmission part 221 is a second gear, the second transmission part 211 is a second rack, one end of the pushing member 30 is fixedly connected to the second rack, the second gear is connected with a swing arm, the second rack extends along the first direction X, and the second rack is engaged with the second gear. The printhead 206 is driven by the X-axis driving assembly 203 to move along the first direction X, so as to drive the swing arm to rotate, thereby driving the second rack to move along the first direction X through the second gear. In this way, the pushing member 30 moves relative to the bearing assembly 10 along the first direction X, and the excess material can also be pushed away from the bearing assembly 10.

[0139] In some embodiments, referring to Figure 6 and Figure 7 , the pushing member 30 has a first position and a second position, and a movement track area Q2 of the pushing member 30 between the first position and the second position covers the material receiving area Q1. The 3D printer 200 further comprises a resetting member 40 connected to the pushing member 30, and the transmission assembly 20 is configured to move from the second position to the first position under the driving of the printhead 206, and the resetting member 40 is configured to drive the pushing member 30 to move from the first position towards the second position after the printhead 206 is separated from the transmission assembly 20.

[0140] When the printhead 206 is spaced from the pushing member 30, the pushing member 30 is in the second position. After the printhead 206 drives the force receiving member 22 to move, so that the pushing member 30 moves to the first position, the printhead 206 can extrude excess material in the material receiving area Q1, and then the printhead 206 leaves the force receiving member 22. The resetting member 40 drives the transmission assembly 20 to move, so as to drive the pushing member 30 in the first position to move towards the second position. During the movement of the pushing member 30, the excess material in the material receiving area Q1 can be pushed away from the bearing assembly 10. In this way, the excess material can be quickly removed after the printhead 206 completes the extrusion of the excess material, and the removal efficiency is improved.

[0141] In some embodiments, referring to Figure 3 , the pushing member 30 comprises a pushing plate 31 and an extending plate 32, the pushing plate 31 is drivingly connected with the transmission assembly 20, and the extending plate 32 is bently connected with the pushing plate 31. The extending plate 32 can block the material extruded by the printhead 206, so as to prevent the material from flowing out of the edge of the bearing assembly 10.

[0142] In some embodiments, when the pushing member 30 is in the first position, the included angle between the pushing member 30 and the length direction of the first rack 2211 is within a range of 50° to 120°. When the pushing member 30 is in the second position, the length direction of the pushing member 30 is substantially parallel to the length direction of the first rack 2211. For example, in Figure 3In the shown embodiment, when the pushing member 30 is in the first position, the pushing plate 31 can be further rotated to the outside of the bearing assembly 10 to push the excess material away from the bearing assembly 10. Meanwhile, the angle between the pushing plate 31 of the pushing member 30 and the length direction of the first rack 2211 is greater than 90° and less than 120°. This not only prevents the pushing member 30 from colliding with the frame 202, but also ensures that the pushing member 30 pushes the excess material away from the bearing assembly 10.

[0143] In some embodiments, referring to Figure 4 , the bearing assembly 10 is provided with a relief groove K7 on the side close to the frame 202 in the first direction X, and the pushing member 30 can be rotated to correspond to the edge of the relief groove K7 to push the excess material away from the bearing assembly 10.

[0144] In some embodiments, referring to Figure 4 , the relief groove K7 includes a first side S1 and a second side S2, and the first side S1 and the second side S2 are arranged at an angle. When the pushing member 30 is in the first position, the extension plate 32 of the pushing member 30 is substantially parallel to the second side S2 of the relief groove K7, and the pushing plate 31 of the pushing member 30 is substantially parallel to the first side S1 of the relief groove K7. At least a part of the extension plate 32 and at least a part of the pushing plate 31 are located in the relief groove K7 to ensure that the pushing member 30 pushes the excess material away from the bearing assembly 10. In this way, the reliability of pushing the excess material away is ensured, and the rotation space required by the pushing member 30 can be further reduced to avoid interference between the pushing member 30 and other parts of the 3D printer 100. In this embodiment, the angle between the pushing plate 31 of the pushing member 30 and the length direction of the first rack 2211 is in the range of 50° to 60° when the pushing member 30 is in the first position, for example, the angle can be set to 58°.

[0145] In some embodiments, the number of teeth of the first gear 2111 is not less than three, and the number of teeth of the first rack 2211 is not less than ten, so as to ensure that the pushing member 30 can be reciprocally rotated between the first position and the second position. For example, the number of teeth of the first gear 2111 is three, four or five or more, and the number of teeth of the first rack 2211 is ten, eleven or twelve or more.

[0146] In some embodiments, the parameters of the teeth of the first gear 2111 and the first rack 2211 are as follows: the modulus is 0.5 module, the tooth width is 6 mm, and the pitch circle diameter of the first gear 2111 is 7.5 mm. In other embodiments, the above parameters can be adjusted according to actual assembly requirements and machining accuracy.

[0147] In some embodiments, referring to Figure 8The reset member 40 comprises an elastic structure connected to the transmission assembly 20. When the pusher 30 is in the first position, the elastic structure is in a deformed state and is configured to exert an elastic force on the transmission assembly 20. When the pusher 30 is in the second position, the elastic structure is in a natural state.

[0148] In the process that the print head 206 approaches the bearing assembly 10 and pushes the force-receiving portion 222 to move, the pusher 30 is switched from the second position to the first position under the drive of the first transmission portion 221. When the nozzle 207 of the print head 206 is in a position corresponding to the receiving area Q1, the pusher 30 is kept in the first position, and the print head 206 extrudes the excess material towards the receiving area Q1. After the print head 206 completes the extrusion of the excess material, in the process that the print head 206 moves away from the bearing assembly 10, the pusher 30 moves from the first position towards the second position under the action of the elastic force of the elastic structure, and pushes the excess material away from the bearing assembly 10. In this way, the elastic structure can realize the extrusion of the excess material after the print head 206 is in place, and realize the action that the pusher 30 pushes the excess material away from the bearing assembly 10 when the print head 206 moves away. It is not necessary to additionally set a motor or other driving structure, nor is it necessary to set a position detector or other detection element, which greatly reduces the cost and control difficulty of the 3D printer 200.

[0149] The elastic structure can be configured as a spring, a tension spring, a spring piece, or an elastic column, etc.

[0150] In other embodiments, the reset member 40 can also be configured as a motor or other driving structure.

[0151] In some embodiments, referring to Figure 7 and Figure 8 The 3D printer 200 further comprises a base member 50. The base member 50 is fixedly connected to the Z-axis driving assembly 205 or the frame 202. One end of the bearing assembly 10 is connected to the base member 50. The elastic structure is connected between the base member 50 and the transmission assembly 20. Specifically, one side of the elastic structure abuts against the force-receiving portion 222, and the other side abuts against the base member 50.

[0152] In some embodiments, referring to Figure 7The first guiding hole K1 is configured to guide the force receiving portion 222 to move along the first direction X. In this way, during the movement of the printhead 206 to push the force receiving portion 222, the movement direction of the force receiving portion 222 can be ensured to be the first direction X, thereby ensuring the movement accuracy of the first rack 2211 along the first direction X, and further improving the rotation accuracy of the first gear 2111. In addition, during the process of the elastic structure driving the first transmission portion 221 to reset to the second position, the first guiding hole K1 can also guide the force receiving portion 222 to move along the first direction X, and limit the force receiving portion 222, so as to ensure that the elastic structure can drive the first rack 2211 to move along the first direction X. Optionally, the first guiding hole K1 is a waist-shaped hole with a length direction parallel to the first direction X.

[0153] In some embodiments, referring to Figure 7 and Figure 8 The base member 50 includes a surrounding wall 52 and a top wall 51. The surrounding wall 52 is connected to the circumferential side of the top wall 51. The bearing assembly 10 includes a mounting plate 12. The top wall 51 is spaced apart from the mounting plate 12 along the first direction X. The surrounding wall 52 is connected between the top wall 51 and the mounting plate 12, and the surrounding wall 52, the top wall 51 and the mounting plate 12 form a receiving cavity Q3 therebetween. One end of the elastic structure abuts against the first transmission portion 221, and the other end abuts against the surrounding wall 52. The first transmission portion 221 and the second transmission portion 211 are both arranged in the receiving cavity Q3. The first guiding hole K1 is arranged in the top wall 51. The force receiving portion 222 passes through the first guiding hole K1 and extends to the side of the top wall 51 away from the mounting plate 12, so as to facilitate contact with the printhead 206, so that the printhead 206 drives the force receiving portion 222 to move.

[0154] In some embodiments, referring to Figure 8 The 3D printer 200 further includes a plurality of first fasteners 62. The plurality of first fasteners 62 are fixedly connected to the mounting plate 12 and the surrounding wall 52 of the base member 50, so as to achieve the fixed connection between the bearing assembly 10 and the base member 50. In some embodiments, the surrounding wall 52 is rectangular. The number of the first fasteners 62 is four, and the four first fasteners 62 are respectively arranged at the four corners of the surrounding wall 52.

[0155] In some embodiments, referring to Figure 8 The transmission assembly 20 further includes a mounting block 223. The mounting block 223 is connected with the first transmission portion 221. The mounting block 223 is provided with a second guiding hole K2 on one side along the first direction X. The second guiding hole K2 has a penetrating direction parallel to the first direction X. The elastic structure is arranged in the second guiding hole K2. In this way, the second guiding hole K2 limits the deformation direction of the elastic structure, so as to ensure that the elastic force of the elastic structure is parallel to the first direction X, and improve the reset reliability of the elastic structure.

[0156] In some embodiments, referring to Figure 8 and Figure 9 The base 50 further comprises a limiting protrusion 54. The limiting protrusion 54 is connected to the surrounding wall 52 and forms a limiting slot C2 with the surrounding wall 52, and the other end of the elastic structure is fitted in the limiting slot C2. Thus, through the cooperation of the limiting slot C2 and the second guide hole K2, the deformation direction of the elastic structure can be further ensured to be parallel to the first direction X.

[0157] In some embodiments, referring to Figure 7 and Figure 8 The receiving cavity Q3 comprises a first sub-cavity Q31 and a second sub-cavity Q32. The first sub-cavity Q31 is in communication with the second sub-cavity Q32. The first rack 2211 is movably arranged in the first sub-cavity Q31 along the first direction X. The base 50 further comprises a mounting column 55. The mounting column 55 is connected to the top wall 51 and located in the second sub-cavity Q32. The mounting column 55 is configured to be rotatably sleeved with the first gear 2111.

[0158] In some embodiments, referring to Figure 10 The base 50 further comprises a connecting wall 53. The connecting wall 53 is connected to the side of the top wall 51 away from the mounting plate 12 and extends along the third direction Z. The connecting wall 53 is configured to be connected to the rack 202 or the Z-axis driving assembly 205 to fix the mounting of the base 50 and the bearing assembly 10. In some embodiments, the length direction of the stress receiving portion 222 is parallel to the third direction Z, so as to increase the contact size between the print head 206 and the stress receiving portion 222 and improve the movement stability of the print head 206 driving the stress receiving portion 222. The side of the connecting wall 53 close to the first guide hole K1 along the first direction X is provided with a avoiding slot C1 extending along the third direction Z and used for avoiding the stress receiving portion 222.

[0159] In some embodiments, referring to Figure 11 and Figure 12 On the movement track area Q2 of the pushing member 30, the pushing plate 31 is located on the inner side of the bearing assembly 10, and at least a part of the extending plate 32 is located on the outer side of the bearing assembly 10. Thus, when the size of the bearing assembly 10 is small, the extending plate 32 can provide a part of the receiving area, so as to avoid the excess material on the print head 206 from falling on the outer side of the bearing assembly 10 and polluting the base 201, the rack 202 or the forming platform 208 of the printer, ensure that all the excess material falls on the bearing assembly 10, and improve the reliability of the excess material removal.

[0160] In some embodiments, referring to Figure 11 and Figure 12The extension plate 32 comprises a first plate segment 321 and a second plate segment 322. The second plate segment 322 is located on the side of the first plate segment 321 away from the bearing assembly 10. The first plate segment 321 extends obliquely to the outside of the bearing assembly 10, and the plate surface of the first plate segment 321 is oblique to the material receiving area Q1. The plate surface of the second plate segment 322 is perpendicular to the material receiving area Q1. In this way, the first plate segment 321 and the second plate segment 322 can be formed on the pushing plate 31 by sheet metal processing, reducing the processing difficulty of the pushing member 30. In other embodiments, the extension plate 32 can also be configured as an integral oblique plate structure, and is connected to the pushing plate 31 by screwing, welding or other connection methods.

[0161] In some embodiments, referring to Figure 13 , the pushing plate 31, the extension plate 32, the first connecting plate 33 and the second connecting plate 34 are integrally formed. The second connecting plate 34 is connected to one end of the pushing plate 31. The first connecting plate 33 is bent and connected to the second connecting plate 34. The extension plate 32 is bent and connected to the other end of the pushing plate 31. The bending direction of the extension plate 32 is different from the bending direction of the first connecting plate 33. When the pushing member 30 is in the first position, the pushing plate 31 and the second connecting plate 34 extend along the first direction X; the extension plate 32 extends along the third direction Z and is bent and connected to one side of the pushing plate 31 along the second direction Y; the first connecting plate 33 extends along the second direction Y and is bent and connected to the other side of the pushing plate 31 along the second direction Y.

[0162] In some embodiments, referring to Figure 11 , the bearing assembly 10 comprises a material receiving plate 11 and a mounting plate 12, the material receiving plate 11 is located on one side of the mounting plate 12, the material receiving area Q1 is arranged on the surface of the material receiving plate 11, the transmission assembly 20 is arranged on the mounting plate 12, the pushing member 30 comprises a first connecting plate 33 and a pushing plate 31, the first connecting plate 33 is connected to the transmission assembly 20, the pushing plate 31 is located on the material receiving plate 11, and the pushing plate 31 is configured to push the excess material away from the material receiving plate 11 under the driving of the first connecting plate 33.

[0163] In some embodiments, referring to Figure 11 , the bearing assembly 10 further comprises an adapter plate 13, one side of the adapter plate 13 is connected to the material receiving plate 11, the other side of the adapter plate 13 is connected to the mounting plate 12, the adapter plate 13 is provided with an avoiding hole K3, the first connecting plate 33 passes through the avoiding hole K3 and is connected to the transmission assembly 20, the pushing plate 31 is connected to the side of the first connecting plate 33 extending out of the avoiding hole K3, the plate surface of the pushing plate 31 intersects with the plate surface of the material receiving plate 11, and the avoiding hole K3 is configured to limit the movement limit position of the first connecting plate 33.

[0164] In some embodiments, referring to Figure 11The avoiding hole K3 includes a first hole section K31 and a second hole section K32. The first hole section K31 is located at one side of the second hole section K32 along the first direction X. The first hole section K31 is formed in the adapter plate 13, and the second hole section K32 penetrates through the adapter plate 13 to the receiving plate 11. When the pushing member 30 is located at the first position, the first connecting plate 33 passes through the first hole section K31. During the rotation of the pushing member 30 from the first position to the second position, the first connecting plate 33 rotates in a direction close to the second hole section K32, and at the same time, the second connecting plate 34 gradually slides into the second hole section K32 until the second connecting plate 34 abuts against the edge of the adapter plate 13 close to the second hole section K32, so that the pushing member 30 enters the second position.

[0165] In some embodiments, referring to Figure 12 The receiving plate 11 has a first edge L1 and a second edge L2 arranged opposite to each other along the first direction X, and the receiving area Q1 is located between the first edge L1 and the second edge L2. The receiving plate 11 also has a third edge L3 on the side away from the mounting plate 12. The third edge L3 is connected between the first edge L1 and the second edge L2. In the first position, the length direction of the pushing plate 31 is parallel to the first direction X, and the extending plate 32 is located on the outside of the first edge L1 away from the second edge L2, and the second edge L2 is arc-shaped. During the rotation of the pushing member 30 towards the second position, the moving track of the extending plate 32 is tangent to the second edge L2. In this way, the occupied space of the receiving plate 11 can be reduced, and interference between the receiving plate 11 and other components of the 3D printer 200 can be avoided.

[0166] In some embodiments, referring to Figure 13 The mounting plate 12 and the receiving plate 11 are spaced apart along the third direction Z, and the receiving plate 11 is located on one side of the mounting plate 12 along the second direction Y. The bearing assembly 10 further includes an adapter plate 13. The adapter plate 13 is connected between the receiving plate 11 and the mounting plate 12. The first connecting plate 33 is located between the receiving plate 11 and the mounting plate 12, and is connected with the second transmission part 211 on the mounting plate 12. The second transmission part 211 further includes a connecting part 212. The 3D printer 200 further includes a second fastener 61. The second fastener 61 fixedly connects the first connecting plate 33 and the second transmission part 211.

[0167] In some embodiments, referring to Figure 14 and Figure 15The mounting plate 12 is provided with a connecting hole K4. The first connecting plate 33 is provided with a limiting hole K5, the connecting portion 212 extends into the limiting hole K5, and the second fastener 61 passes through the connecting hole K4 and is connected with the connecting portion 212, so as to fix the first connecting plate 33 to the first transmission portion 221. Thus, the first transmission portion 221 drives the first connecting plate 33 to rotate. The limiting hole K5 is shaped as a special shape, a rectangle, an ellipse or various shapes, so as to prevent relative rotation between the connecting portion 212 and the first connecting plate 33, thereby improving the connection reliability of the connecting portion 212 and the first connecting plate 33. The second fastener 61 can be configured as a screw, a pin or various fastening structures.

[0168] The above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced without departing from the spirit and scope of the present application.

Claims

1. A 3D printer comprising a print head, characterized in that, The 3D printer further comprises: a bearing assembly provided with a material receiving area configured to receive the excess material extruded by the printing head; a transmission assembly movably arranged on the bearing assembly; a pushing member rotatably connected to the transmission assembly, a movement track area of the pushing member covering at least part of the material receiving area, the pushing member being configured to rotate relative to the bearing assembly under the drive of the transmission assembly and push the excess material away from the bearing assembly.

2. The 3D printer according to claim 1, characterized in that: the transmission assembly comprises a transmission member and a force receiving member, one end of the transmission member being in transmission connection with the force receiving member, the other end of the transmission member being connected to the pushing member, the force receiving member being configured to drive the transmission member to move relative to the bearing assembly under the drive of the printing head, thereby driving the pushing member to rotate relative to the bearing assembly.

3. The 3D printer according to claim 2, characterized in that: the force receiving member comprises a force receiving portion and a first transmission portion, the force receiving portion being connected to the first transmission portion, the force receiving portion being configured to drive the first transmission portion to move under the drive of the printing head; the transmission member comprises a second transmission portion, the second transmission portion being rotatably connected to the first transmission portion, the second transmission portion being connected to the pushing member, the second transmission portion being configured to rotate under the drive of the first transmission portion to drive the pushing member to rotate relative to the bearing assembly.

4. The 3D printer according to claim 3, characterized in that: the first transmission portion comprises a first rack, and the second transmission portion comprises a first gear, the first rack being in meshing connection with the first gear.

5. The 3D printer according to claim 4, characterized in that: the pushing member is configured to selectively rotate between a first position and a second position, a movement track area of the pushing member between the first position and the second position covering at least part of the material receiving area; an included angle between the pushing member and a length direction of the first rack ranges from 50° to 120° when the pushing member is in the first position, and the pushing member is substantially parallel to the length direction of the first rack when the pushing member is in the second position.

6. The 3D printer according to claim 4, characterized in that: a number of teeth of the first gear is not less than three, and a number of teeth of the first rack is not less than ten.

7. The 3D printer according to claim 6, characterized in that: a module of the teeth of the first gear and a module of the teeth of the first rack are both 0.5 module, a tooth width of the teeth of the first gear and a tooth width of the teeth of the first rack are both between 5 mm and 7 mm, and a diameter of a pitch circle of the first gear is between 7 mm and 8 mm.

8. The 3D printer according to claim 2, characterized in that: The pushing member is configured to selectively rotate between a first position and a second position, and a movement track area of the pushing member between the first position and the second position covers at least a part of the material receiving area; The 3D printer further comprises a resetting member connected to the pushing member, the transmission assembly is configured to rotate from the second position to the first position under the driving of the printing head, and the resetting member is configured to drive the pushing member to rotate from the first position towards the second position after the printing head is separated from the transmission assembly.

9. The 3D printer of claim 8, wherein: The resetting member comprises an elastic structure connected to the transmission assembly, the elastic structure is in a deformed state when the pushing member is in the first position and is configured to apply an elastic force to the transmission assembly, and the elastic structure is in a natural state when the pushing member is in the second position.

10. The 3D printer of claim 1, wherein: The bearing assembly is provided with a clearance groove on a side close to the rack in a first direction, and the pushing member can rotate to correspond to an edge of the clearance groove to push the excess material away from the bearing assembly.

11. The 3D printer of claim 10, wherein: The clearance groove comprises a first side edge and a second side edge, and the first side edge and the second side edge are arranged at an included angle; The pushing member comprises a pushing plate and an extending plate, the pushing plate is in transmission connection with the transmission assembly, and the extending plate is connected to the pushing plate, the pushing plate is substantially parallel to the first side edge, and the extending plate is substantially parallel to the second side edge when the pushing member rotates to correspond to the clearance groove.

12. The 3D printer of claim 1, wherein: The pushing member comprises a pushing plate and an extending plate, the pushing plate is in transmission connection with the transmission assembly, and the extending plate is connected to the pushing plate, the pushing plate is located on an inner side of the bearing assembly, and at least a part of the extending plate is located on an outer side of the bearing assembly in a movement track area of the pushing member.

13. The 3D printer of claim 12, wherein: The pushing member is configured to selectively move between a first position and a second position, and a movement track area of the pushing member between the first position and the second position covers at least a part of the material receiving area; The extending plate is bent to connect to the pushing plate, the pushing plate is substantially parallel to a side edge of the bearing assembly, and the extending plate extends to the outer side of the bearing assembly in a direction away from the bearing assembly when the pushing member is in the first position.

14. The 3D printer of claim 1, wherein: The bearing assembly comprises a material receiving plate and a mounting plate, the material receiving plate is located on one side of the mounting plate, the material receiving area is arranged on the material receiving plate, the transmission assembly is arranged on the mounting plate, the pushing member comprises a first connecting plate and a pushing plate, the first connecting plate is connected with the transmission assembly, the pushing plate is located on the material receiving plate, and the pushing plate is configured to push the excess material away from the material receiving plate under the driving of the first connecting plate.

15. The 3D printer of claim 14, wherein: The bearing assembly further comprises an adapter plate, one side of the adapter plate is connected with the material receiving plate, the other side of the adapter plate is connected with the mounting plate, the adapter plate is provided with an avoiding hole, the first connecting plate passes through the avoiding hole and is connected with the transmission assembly, the pushing plate is connected to the side of the first connecting plate extending out of the avoiding hole, the plate surface of the pushing plate intersects with the plate surface of the material receiving plate, and the avoiding hole is configured to limit the movement limit position of the first connecting plate.

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