Connecting assembly and 3D printer

Abstract

The present application relates to the technical field of 3D printing, and relates in particular to a connecting assembly and a 3D printer. The connecting assembly is applied to a 3D printer. The 3D printer further comprises a heated bed, a heated bed connecting member, and a heated bed lifting assembly. The heated bed lifting assembly is connected to the heated bed by means of the heated bed connecting member, and the heated bed lifting assembly is capable of driving the heated bed to move along a height direction of the 3D printer. The connecting assembly comprises a first connecting member, a second connecting member, and a movable member. The first connecting member is connected to the heated bed connecting member, the second connecting member is connected to the heated bed lifting assembly, and the movable member is located between the first connecting member and the second connecting member. The movable member is capable of moving relative to the first connecting member and the second connecting member along a first plane, the first plane being perpendicular to the height direction. In this way, the connecting assembly is easy to manufacture, and can stably transmit the driving force of the heated bed lifting assembly. The connecting assembly can stably transmit the driving force of the heated bed lifting assembly to the heated bed connecting member. The movable member can effectively transmit torque while achieving movement along the first plane perpendicular to the height direction. While ensuring stable transmission of motion in the height direction, tolerances and fluctuations are eliminated through movement along the first plane perpendicular to the height direction, thereby achieving precise motion.

Description

Connectivity components and 3D printers

[0001] This application claims priority to Chinese Patent Application No. 202520107380.2, filed on January 15, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of 3D printing technology, and in particular to a connection component and a 3D printer. Background Technology

[0003] 3D printing technology, also known as additive manufacturing, is a technology that uses digital model files as a basis and employs adhesive materials to construct objects layer by layer. 3D printing is typically achieved using 3D printing equipment. 3D printing equipment, also called three-dimensional printers or stereoprinters, is a type of rapid prototyping equipment.

[0004] A 3D printer includes a heated bed, a heated bed connector, and a heated bed lifting assembly, which is connected to the heated bed via the heated bed connector. The heated bed lifting assembly can drive the heated bed to move along the height direction of the 3D printer. During this movement, the heated bed lifting assembly and the heated bed connector may shift, which can affect the parallelism of the heated bed.

[0005] Existing heated bed lifting components and heated bed connectors can be decoupled using structures such as double sliders or double thrust bearings. However, double sliders result in higher friction, greater resistance, and poor decoupling effectiveness, while also introducing gaps. Double thrust bearings cannot effectively limit the transmission of rotational torque. Summary of the Invention

[0006] The summary of this application introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] According to one aspect of this application, a connection assembly is provided for a 3D printer, the 3D printer further comprising a heated bed, a heated bed connector, and a heated bed lifting assembly, the heated bed lifting assembly being connected to the heated bed via the heated bed connector, the heated bed lifting assembly being capable of driving the heated bed to move along the height direction of the 3D printer, the connection assembly comprising:

[0008] A first connecting member is connected to the heated bed connector;

[0009] A second connecting member, the second connecting member being connected to the heated bed lifting assembly; and

[0010] A movable component, located between the first connecting component and the second connecting component.

[0011] The movable member is movable relative to the first connecting member and the second connecting member along a first plane, which is perpendicular to the height direction.

[0012] According to this application, a connecting component is used in a 3D printer. The 3D printer also includes a heated bed, a heated bed connector, and a heated bed lifting assembly. The heated bed lifting assembly is connected to the heated bed via the heated bed connector and can drive the heated bed to move along the height direction of the 3D printer. The connecting component includes a first connecting member, a second connecting member, and a moving member. The first connecting member is connected to the heated bed connector, the second connecting member is connected to the heated bed lifting assembly, and the moving member is located between the first and second connecting members. The moving member is movable relative to the first and second connecting members along a first plane perpendicular to the height direction. This design makes the connecting component easy to manufacture, allows for stable transmission of the power transmitted by the heated bed lifting assembly, and enables stable transmission of the power transmitted by the heated bed lifting assembly to the heated bed connector. The moving member effectively transmits torque and can also move along a first plane perpendicular to the height direction. While ensuring stable transmission of height-direction movement, movement along a first plane perpendicular to the height direction eliminates tolerances and fluctuations, resulting in more precise movement.

[0013] Optionally, the connecting component includes a first rolling member, the moving member includes a first surface, the first surface is provided with a first guide structure, the first rolling member is connected to the first guide structure, and the first rolling member is capable of rolling relative to the moving member in a first direction.

[0014] Optionally, the first connecting member is provided with a second guide structure, the first rolling member is located between the first guide structure and the second guide structure, and the first rolling member is able to roll relative to the first connecting member along the first direction.

[0015] Optionally, the first guide structure and / or the second guide structure include a groove, and the first rolling member is a steel ball.

[0016] Optionally, the connecting component includes a second rolling member, the moving member includes a second surface, the second surface is provided with a third guide structure, the second rolling member is connected to the third guide structure, and the second rolling member is capable of rolling in a second direction relative to the moving member.

[0017] Optionally, the second connecting member is provided with a fourth guide structure, the second rolling member is located between the third guide structure and the fourth guide structure, and the second rolling member is able to roll relative to the second connecting member in the second direction.

[0018] Optionally, the third guide structure and / or the fourth guide structure includes a groove, and the second rolling member is a steel ball.

[0019] Optionally, the heated bed lifting assembly further includes a lead screw, and the second connecting member includes a first part and a second part. The first part is connected to the lead screw, and the second part is provided with the fourth guide structure. The first part also has a through hole, through which the lead screw passes. The diameter of the through hole is larger than the diameter of the lead screw.

[0020] The first part and the second part are integrally formed, or,

[0021] The first part and the second part are connected by a connector.

[0022] Optionally, the moving component is provided with a first guide structure and a third guide structure, the first connecting component is provided with a second guide structure, the second connecting component is provided with a fourth guide structure, and the connecting assembly further includes a first rolling component and a second rolling component.

[0023] At least one of the first guide structure, the second guide structure, the third guide structure, and the fourth guide structure includes a V-groove or an arc groove, the first rolling member and / or the second rolling member are constructed as steel balls, and / or,

[0024] The stagger angle between the first guide structure and the third guide structure is 90°.

[0025] Optionally, the first connecting member is located above the moving member along the height direction of the heated bed lifting assembly, and the second connecting member is located below the moving member along the height direction of the heated bed lifting assembly.

[0026] Optionally, the connecting assembly further includes a first connector and a second connector, wherein the first connector is used to fix the first connecting member and the heated bed connector, and the second connector is used to fix the second connecting member and the heated bed lifting assembly.

[0027] According to another aspect of this application, a 3D printer is also provided, the 3D printer including a heated bed connector, a heated bed lifting assembly and the aforementioned connecting assembly, wherein a first connecting member is connected to the heated bed connector and a second connecting member is connected to the heated bed lifting assembly.

[0028] According to the 3D printer of this application, the 3D printer includes a heated bed connector, a heated bed lifting assembly, and the aforementioned connecting assembly. A first connecting member is connected to the heated bed connector, and a second connecting member is connected to the heated bed lifting assembly. The connecting assembly includes a first connecting member, a second connecting member, and a moving member. The first connecting member is connected to the heated bed connector, the second connecting member is connected to the heated bed lifting assembly, and the moving member is located between the first and second connecting members. The moving member is movable relative to the first and second connecting members along a first plane, which is perpendicular to the height direction. This design makes the connecting assembly easy to manufacture, allows for stable transmission of the power transmitted by the heated bed lifting assembly, and enables stable transmission of the power transmitted by the heated bed lifting assembly to the heated bed connector. The moving member effectively transmits torque and can also move along a first plane perpendicular to the height direction. While ensuring stable transmission of height-direction movement, movement along a first plane perpendicular to the height direction eliminates tolerances and fluctuations, resulting in more precise movement. Attached Figure Description

[0029] The following figures are included as part of this application for understanding the application. The figures illustrate embodiments of the application and their descriptions, explaining the apparatus and principles of the application. In the figures,

[0030] Figure 1 is a partial schematic diagram of a 3D printer according to a preferred embodiment of this application;

[0031] Figure 2 is a perspective view of a connection component according to a preferred embodiment of this application;

[0032] Figure 3 is a cross-sectional schematic diagram of the connecting component shown in Figure 2;

[0033] Figure 4 is a top-exploded view of the connecting assembly shown in Figure 2;

[0034] Figure 5 is an exploded view of the connecting assembly shown in Figure 2 from below.

[0035] Explanation of reference numerals in the attached drawings: 100: Connecting component; 110: First connecting member; 111: Second groove; 112: Heated bed connecting hole; 130: Second connecting member; 131: Fourth groove; 132: First part; 133: Second part; 150: Moving member; 151: First surface; 152: Second surface; 153: First groove; 154: Third groove; 171: First rolling member; 172: Second rolling member; 173: First connector; 174: Second connector; 175: First pre-installed hole; 176: Moving pre-installed hole; 177: Second pre-installed hole; 181: First through hole; 182: Second through hole; 183: Moving through hole; 201: Heated bed connector; 202: Lead screw; 203: Lead screw nut; 204: Nut connecting hole; 205: Lead screw hole; 206: Pre-installed part. Detailed Implementation

[0036] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0037] To fully understand this application, detailed portions will be set forth in the following description in order to illustrate it. Obviously, implementation of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may exist besides these detailed descriptions, and should not be construed as being limited to the embodiments set forth herein.

[0038] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. The terms “upper,” “lower,” “front,” “rear,” “left,” “right,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0039] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0041] As shown in Figure 1, this application provides a connecting component 100 for use in a 3D printer. The 3D printer utilizes FDM (Fused Deposition Modeling) technology for printing. The 3D printer includes a tool head and a heated bed, and the tool head is movable. When the tool head moves to a preset position, it heats and melts a filament of thermoplastic material, which is then extruded through the nozzle of the tool head and stacked layer by layer on the heated bed from bottom to top to build an object. In this embodiment, "bottom" refers to the direction towards the bottom of the 3D printer, and "top" refers to the direction towards the top of the 3D printer. The tool head includes an extrusion assembly and a hot end. The extrusion assembly conveys the printing material supplied to the 3D printer by the feeding device to the hot end. The hot end has a heating function, heating the printing material to a molten state and extruding the molten printing material onto the heated bed.

[0042] For example, the hot end includes heat sink fins, a nozzle, and a throat located between the heat sink fins and the nozzle. The printing material passes sequentially through the heat sink fins, the throat, and the nozzle. Specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrudes the molten printing material onto the heated bed.

[0043] The 3D printer also includes a heated bed lifting assembly and a heated bed connector 201. The heated bed lifting assembly is connected to the heated bed via the heated bed connector 201. The heated bed lifting assembly adjusts the position of the heated bed along the height direction of the 3D printer. The height direction of the heated bed lifting assembly is parallel to the height direction of the 3D printer. The tool head can move along the height direction of the heated bed lifting assembly to achieve material stacking. During the movement along the printing path, the nozzle extrudes molten printing material layer by layer at different locations on the heated bed, thereby printing a three-dimensional object.

[0044] The heated bed lifting assembly drives the heated bed to move along the height direction of the 3D printer. The heated bed lifting assembly includes a lead screw 202 for driving the heated bed movement. The assembly also includes an optical axis, which is arranged parallel to the lead screw 202. The 3D printer also includes a pulley connected to the lead screw 202. Rotation of the pulley drives the lead screw 202 to rotate. A retaining pin is located at the bottom end of the lead screw 202. The retaining pin can be connected to the axis of the pulley. The cross-sectional shape of the retaining pin can be constructed as the letter "3D". Rotation of the pulley drives the retaining pin to rotate, thereby driving the lead screw 202 to rotate. The pulley can be connected to the connecting assembly 100 to prevent it from detaching. A tool head is movably connected to the lead screw 202, and the optical axis guides the movement of the tool head. The optical axis is connected to the connecting assembly 100. The bottom end of the optical axis is connected to the connecting assembly 100.

[0045] The 3D printer also includes a chamber in which a tool head and a heated bed are disposed. One end of the heated bed connector 201 is connected to the heated bed lifting assembly. Preferably, the heated bed connector 201 is located below the heated bed. The heated bed connector 201 is located below the heated bed along the height direction of the 3D printer. The other end of the heated bed connector 201 is connected to the heated bed. In this embodiment, "bottom surface of the heated bed" refers to the surface of the heated bed facing the bottom of the 3D printer.

[0046] As shown in Figure 2, the lead screw 202 is equipped with a lead screw nut 203, which is connected to the heated bed connector 201. The lead screw nut 203 can move along the height direction of the lead screw 202, thereby driving the heated bed connector 201 to move along the height direction of the lead screw 202. The optical shaft is equipped with a linear bearing, which is connected to the heated bed connector 201. The linear bearing guides the heated bed connector 201 as it moves along the height direction of the lead screw 202.

[0047] The connecting assembly 100 connects the heated bed connector 201 and the heated bed lifting assembly. The connecting assembly 100 decouples the heated bed connector 201 and the heated bed lifting assembly. In this embodiment, "decoupling" means that the connecting assembly 100 can dissolve the constraint forces in different directions experienced during movement. Specifically, the connecting assembly 100 absorbs the constraint forces in different directions experienced by the heated bed during movement. The lead screw 202 passes through the connecting assembly 100. The connecting assembly 100 is sleeved around the lead screw 202.

[0048] Specifically, the connecting assembly 100 includes a first connecting member 110, a second connecting member 130, and a moving member 150, with the moving member 150 located between the first connecting member 110 and the second connecting member 130. The stacking direction of the first connecting member 110, the moving member 150, and the second connecting member 130 of the connecting assembly 100 is parallel to the height direction of the 3D printer.

[0049] The first connecting member 110 is constructed as a plate. The thickness direction of the first connecting member 110 is parallel to the height direction of the 3D printer. The second connecting member 130 is constructed as a plate. The thickness direction of the second connecting member 130 is parallel to the height direction of the 3D printer. The moving member 150 is constructed as a plate. The thickness direction of the moving member 150 is parallel to the height direction of the 3D printer.

[0050] The first connecting member 110 is positioned above the moving member 150 along the height direction of the heated bed lifting assembly. The second connecting member 130 is positioned below the moving member 150 along the height direction of the heated bed lifting assembly. This facilitates support of the heated bed. The moving member 150 is movable between the first connecting member 110 and the second connecting member 130. The moving member 150 is movable relative to the first connecting member 110 along a first plane. The first plane is perpendicular to the height direction of the 3D printer. The moving member 150 is also movable relative to the second connecting member 130 along the first plane. The direction of movement of the moving member 150 relative to the first connecting member 110 is perpendicular to the direction of movement of the moving member 150 relative to the second connecting member 130. The moving member 150 is movable between the first connecting member 110 and the second connecting member 130 in a direction perpendicular to the stacking direction. The stacking direction is parallel to the height direction of the 3D printer. The moving member 150 is movable in different directions. This allows the moving member 150 to absorb constraint forces from different directions.

[0051] The first connecting member 110 is connected to the heated bed connector 201. The first connecting member 110 and the heated bed connector 201 are fixed together. The heated bed connector 201 and the first connecting member 110 move together. The first connecting member 110 can effectively transmit rotational torque. For ease of installation, the connecting assembly 100 also includes a first connector 173, which is used to fix the first connecting member 110 and the heated bed connector 201. The first connector 173 can be constructed as a bolt. The first connecting member 110 is provided with a heated bed connection hole 112, which passes through the first connecting member 110. The axial direction of the heated bed connection hole 112 is parallel to the axial direction of the lead screw 202. The axial direction of the heated bed connection hole 112 is parallel to the height direction of the 3D printer.

[0052] The first connecting member 110 connects to the heated bed connection hole 112. The heated bed connector 201 includes a receiving hole corresponding to the heated bed connection hole 112. The axial direction of the receiving hole is parallel to the axial direction of the heated bed connection hole 112. The first connecting member 173 connects to the receiving hole. The first connecting member 173 connects the heated bed connection hole 112 and the receiving hole. As an optional embodiment, the first connecting member 110, the heated bed connector 201, and the first connecting member 173 are connected together by a threaded connection. The first connecting member 173 is provided with an external thread, the heated bed connection hole 112 is provided with an internal thread, and the receiving hole is provided with an internal thread. The external thread of the first connecting member 173, the internal thread of the heated bed connection hole 112, and the internal thread of the receiving hole are connected together.

[0053] The second connecting member 130 is connected to the heated bed lifting assembly. The second connecting member 130 is fixed to the heated bed lifting assembly. The heated bed lifting assembly and the second connecting member 130 move together. The second connecting member 130 can effectively transmit rotational torque. For ease of installation, the connecting assembly 100 also includes a second connector 174 for fixing the second connecting member 130 and the heated bed lifting assembly. The second connector 174 can be constructed as a bolt. The second connecting member 130 is provided with a lifting connection hole that extends through the second connecting member 130. The axial direction of the lifting connection hole is parallel to the axial direction of the lead screw 202. The axial direction of the lifting connection hole is parallel to the height direction of the 3D printer. The second connecting member 130 connects to the lifting connection hole.

[0054] The heated bed lifting assembly includes a lead screw nut 203 connected to a lead screw. Rotation of the lead screw drives the lead screw nut 203 to move axially along the lead screw 202. Specifically, the lead screw nut 203 can move linearly along the height direction of the 3D printer. A second connecting member 174 can also fix the second connecting member 130 and the lead screw nut 203. As shown in Figure 3, the lead screw nut 203 is provided with a nut connecting hole 204, which corresponds to the lifting connecting hole. The axial direction of the nut connecting hole 204 is parallel to the axial direction of the lifting connecting hole.

[0055] The second connector 174 connects to the nut connecting hole 204. The second connector 174 connects the lifting connecting hole and the nut connecting hole 204. In an optional embodiment, the second connector 174, the heated bed lifting assembly, and the second connector 174 are connected together by a threaded connection. The second connector 174 has an external thread, the lifting connecting hole has an internal thread, and the nut connecting hole 204 has an internal thread. The external thread of the second connector 174, the internal thread of the lifting connecting hole, and the internal thread of the nut connecting hole 204 are connected together.

[0056] As shown in Figures 4 and 5, the moving member 150 and the first connecting member 110 can move relative to each other along a first direction D1. The first direction D1 is parallel to a first plane. The moving member 150 can move relative to the first connecting member 110 along the first direction D1. The first connecting member 110 can move relative to the moving member 150 along the first direction D1. The first direction D1 is perpendicular to the height direction of the 3D printer. The first direction D1 can be parallel to the first radial direction of the lead screw 202. The first direction D1 can be parallel to the width direction of the 3D printer. The width direction of the 3D printer is perpendicular to the height direction of the 3D printer. The first direction D1 can be parallel to the X-axis direction of the 3D printer. In this way, the moving member 150 can absorb the constraint forces from different directions experienced by the heated bed during movement, ensuring uniform force on the lead screw at any position in the circumferential direction of rotation. This improves the rotational positioning accuracy, ensuring that the heated bed connector 201 can move linearly with high precision along the axial direction of the lead screw 202, reducing layer patterns and printing errors during the 3D printing process.

[0057] The moving member 150 and the second connecting member 130 are movable relative to each other along a second direction D2. The second direction D2 is perpendicular to the first direction D1. The second direction D2 is parallel to the first plane. The moving member 150 is movable relative to the second connecting member 130 along the second direction D2. The second connecting member 130 is movable relative to the moving member 150 along the second direction D2. The second direction D2 is perpendicular to the height direction of the 3D printer. The second direction D2 can be parallel to the second radial direction of the lead screw 202. The second direction D2 can be parallel to the depth direction of the 3D printer. The depth direction of the 3D printer is perpendicular to the height direction of the 3D printer. The second direction D2 can be parallel to the Y-axis direction of the 3D printer. In this way, the moving member 150 can absorb the constraint forces from different directions experienced by the heated bed during movement, ensuring uniform force on the lead screw at any position in the circumferential direction of rotation. This improves the rotational positioning accuracy, ensuring that the heated bed connector 201 can move linearly with high precision along the axial direction of the lead screw 202, reducing layer texture and printing errors during the 3D printing process.

[0058] When the lead screw nut 203 experiences fluctuations due to the lead screw 202 not being straight or other manufacturing tolerances, its movement in the first direction D1 will not affect the heated bed connector 201, thus achieving decoupling. The moving member 150 and the first connecting member 110 move relative to each other along the first direction D1, enabling movement in the first direction D1. When the lead screw nut 203 experiences fluctuations due to the lead screw 202 not being straight or other manufacturing tolerances, its movement in the second direction D2 will not affect the heated bed connector 201, thus achieving decoupling. The moving member 150 and the second connecting member 130 move relative to each other along the second direction D2, enabling movement in the second direction D2. The moving member 150 and the first connecting member 110 move relative to each other along the first direction D1, and the moving member 150 and the second connecting member 130 move relative to each other along the second direction D2, enabling movement in both directions D1 and D2, thus combining to achieve movement in both directions and forming a complete planar motion.

[0059] The first connecting member 110 and the heated bed connector 201 do not rotate relative to each other, thus effectively transmitting torque. The moving member 150 and the first connecting member 110 do not rotate relative to each other, thus effectively transmitting torque. The second connecting member 130 and the heated bed lifting assembly do not rotate relative to each other, thus effectively transmitting torque.

[0060] According to the present application, the connection component 100 is used for a 3D printer. The 3D printer also includes a heated bed, a heated bed connector 201, and a heated bed lifting assembly. The heated bed lifting assembly is connected to the heated bed through the heated bed connector 201. The heated bed lifting assembly can drive the heated bed to move along the height direction of the 3D printer. The connection component 100 includes a first connecting member 110, a second connecting member 130, and a moving member 150. The first connecting member 110 is connected to the heated bed connector 201, the second connecting member 130 is connected to the heated bed lifting assembly, and the moving member 150 is located between the first connecting member 110 and the second connecting member 130. The moving member 150 is movable relative to the first connecting member 110 and the second connecting member 130 along a first plane, which is perpendicular to the height direction. In this way, the connecting component 100 is easy to manufacture, the connecting component 100 can stably transmit the power transmission of the heated bed lifting component, the connecting component 100 can stably transmit the power transmission of the heated bed lifting component to the heated bed connector 201, the moving component 150 can effectively transmit torque, and can also realize movement along the first plane perpendicular to the height direction. While ensuring stable transmission of height direction movement, the movement along the first plane perpendicular to the height direction eliminates tolerances and fluctuations, making the movement more precise.

[0061] Further, as shown in Figure 4, the movable member 150 includes a first surface 151 facing the first connecting member 110. The first surface 151 faces the first connecting member 110 along the axial direction of the lead screw 202. The first surface 151 is provided with a first guide structure, which faces the first connecting member 110. The connecting assembly 100 also includes a first rolling member 171, which is connected to the first guide structure. The first rolling member 171 is capable of rolling relative to the movable member 150 along a first direction D1.

[0062] As an optional implementation, the first guide structure includes a first groove 153 facing the first connecting member 110. The first groove 153 is recessed from the first surface 151. The first groove 153 is recessed from the first surface 151 in a direction away from the first connecting member 110 along the axial direction of the lead screw 202. The opening direction of the first groove 153 faces the first connecting member 110. The extending direction of the first groove 153 is parallel to the first direction D1. Of course, the first guide structure may also include other structures, such as a slide rail or other structures that can guide the movement of the first rolling member; this application does not limit this to any particular structure.

[0063] The first rolling member 171 is located in the first groove 153. The moving member 150 is in close contact with the first connecting member 110 via the first rolling member 171. The moving member 150 can effectively transmit rotational torque. The first rolling member 171 can roll in the first groove 153. As an alternative embodiment, the first groove 153 includes a V-shaped groove or an arc-shaped groove, and the first rolling member 171 is constructed as a steel ball. The V-shaped groove or arc-shaped groove of the first groove 153 can absorb tolerances in the height direction and can be stably positioned. The first rolling member 171 can roll in the first groove 153 along the extension direction of the first groove 153. The first rolling member 171 can roll relative to the moving member 150. The first rolling member 171 can roll relative to the moving member 150 along a first direction D1. Thus, planar tolerances can be stably absorbed, and rolling friction reduces transmission resistance, making it easy to manufacture.

[0064] As shown in Figure 5, the first connecting member 110 is provided with a second guide structure, which faces the moving member 150. The first rolling member 171 is connected to the second guide structure. The first rolling member 171 can roll relative to the first connecting member 110 along a first direction D1. The first rolling member 171 is located between the first guide structure and the second guide structure.

[0065] As an optional implementation, the second guide structure includes a second groove 111 facing the moving member 150. The second groove 111 is recessed from the surface of the first connecting member 110 facing the moving member 150. The second groove 111 is recessed from the surface of the first connecting member 110 facing the moving member 150 in a direction away from the moving member 150 along the axial direction of the lead screw 202. Of course, the second guide structure may also include other structures, such as a slide rail or other structures that can guide the movement of the first rolling member, and this application is not limited thereto.

[0066] The opening of the second groove 111 faces the direction of the moving member 150. The extension direction of the second groove 111 is parallel to the first direction D1. As an optional embodiment, the second groove 111 includes a V-shaped groove or an arc-shaped groove. The V-shaped groove or arc-shaped groove of the second groove 111 can absorb tolerances in the height direction and can be stably positioned.

[0067] The first rolling member 171 is located between the first groove 153 and the second groove 111. The first rolling member 171 is located within the second groove 111. The first rolling member 171 is capable of rolling within the second groove 111. The first rolling member 171 is capable of rolling within the second groove 111 along the extending direction of the second groove 111. The first rolling member 171 is capable of rolling within the second groove 111 along a first direction D1. The first rolling member 171 is capable of rolling relative to the first connecting member 110 along the first direction D1. Therefore, planar tolerances can be stably absorbed, and rolling friction reduces transmission resistance, making it easy to manufacture.

[0068] The first groove 153 and the second groove 111 clamp the first rolling member 171, thereby preventing the first rolling member 171 from disengaging. Furthermore, a certain gap exists between the lead screw nut 203 and the heated bed connector 201, smaller than the space required in the height direction for the first rolling member 171 to disengage from the first groove 153 and the second groove 111. This ensures that even without gravity constraints, the connecting assembly 100 cannot separate as the heated bed connector 201 moves along the height direction of the 3D printer, while also preventing manufacturing errors from causing assembly failures.

[0069] The constraint force may include a first force, the direction of which is parallel to a first direction D1. When the moving member 150 is subjected to the first force, it can shift, moving relative to the first connecting member 110. Under the force of the moving member 150, the first rolling member 171 moves in the first groove 153 along the first direction D1, thereby absorbing the force in the first direction D1. Similarly, when the heated bed connector 201 is subjected to the first force, the first connecting member 173 can shift, moving relative to the moving member 150. Under the force of the first connecting member 110, the first rolling member 171 moves in the second groove 111 along the first direction D1, thereby absorbing the force in the first direction D1. This achieves parallel decoupling in the X direction.

[0070] In a preferred embodiment, the first surface 151 is provided with at least two first grooves 153, and the first connecting member 110 is provided with at least two second grooves 111. The at least two first grooves 153 correspond to the at least two second grooves 111 respectively. The at least two first grooves 153 are arranged in parallel. The at least two second grooves 111 are arranged in parallel. The first grooves 153 and the second grooves 111 are arranged in parallel. This allows for stable torque transmission. The connecting assembly 100 includes at least two first rolling members 171, each located in one of the at least two first grooves 153 and each located in one of the at least two second grooves 111.

[0071] In the embodiment shown in Figure 4, the first surface 151 is provided with three first grooves 153, and the first connecting member 110 is provided with three second grooves 111. The three first grooves 153 correspond to the three second grooves 111 respectively. The three first grooves 153 are arranged in parallel. The three second grooves 111 are arranged in parallel. The connecting assembly 100 includes three first rolling members 171, which are respectively located in the three first grooves 153 and the three second grooves 111. Of course, the number of first grooves 153, second grooves 111, and first rolling members 171 can be adjusted, for example, two, four, or more; this embodiment does not limit this.

[0072] As shown in Figures 4 and 5, the moving member 150 further includes a second surface 152 facing the second connecting member 130. The second surface 152 faces the second connecting member 130 along the axial direction of the lead screw 202. The second surface 152 is provided with a third guide structure, which faces the second connecting member 130. The connecting assembly 100 further includes a second rolling member 172, which is connected to the third guide structure. The second rolling member 172 is capable of rolling relative to the moving member 150 along a second direction D2.

[0073] As an optional implementation, the third guide structure includes a third groove 154 facing the second connecting member 130. The third groove 154 is recessed from the second surface 152. The third groove 154 is recessed from the second surface 152 in a direction away from the second connecting member 130 along the axial direction of the lead screw 202. Of course, the third guide structure may also include other structures, such as a slide rail or other structures that can guide the movement of the second rolling member, and this application is not limited thereto. The opening direction of the third groove 154 is towards the second connecting member 130. The extension direction of the third groove 154 is parallel to the second direction D2. The first guide structure and the third guide structure are arranged perpendicularly. The stagger angle between the first guide structure and the third guide structure is 90°. Preferably, the first groove 153 and the third groove 154 are arranged perpendicularly. The stagger angle between the first groove 153 and the third groove 154 is 90°. In this embodiment, "stagger angle" means that the first groove 153 and the third groove 154 are staggered, and the angle between the first groove 153 and the third groove 154 is 90°.

[0074] The second rolling member 172 is located in the third groove 154. The moving member 150 is in close contact with the second connecting member 130 via the second rolling member 172. The moving member 150 can effectively transmit rotational torque. The second rolling member 172 can roll in the third groove 154. The second rolling member 172 can roll in the third groove 154 along the extension direction of the third groove 154. The second rolling member 172 can also roll relative to the moving member 150. The second rolling member 172 can roll relative to the moving member 150 along a second direction D2. As an optional embodiment, the third groove 154 includes a V-shaped groove or an arc-shaped groove, and the second rolling member 172 is constructed as a steel ball. The V-shaped groove or arc-shaped groove of the third groove 154 can absorb tolerances in the height direction and can be stably positioned. Thus, planar tolerances can be stably absorbed, and rolling friction reduces transmission resistance, making it easy to manufacture.

[0075] The second connecting member 130 is provided with a fourth guide structure, which faces the moving member 150. The second rolling member 172 is connected to the fourth guide structure. The second rolling member 172 is able to roll relative to the second connecting member 130 along the second direction D2.

[0076] As an optional implementation, the fourth guide structure includes a fourth groove 131 facing the moving member 150. The fourth groove 131 is recessed from the surface of the second connecting member 130 facing the moving member 150. The fourth groove 131 is recessed from the surface of the second connecting member 130 facing the moving member 150 in a direction away from the moving member 150 along the axial direction of the lead screw 202. Of course, the fourth guide structure may also include other structures, such as a slide rail or other structures that can guide the movement of the second rolling member; this application does not limit this to any particular structure.

[0077] The opening direction of the fourth groove 131 faces the direction of the moving member 150. The extension direction of the fourth groove 131 is parallel to the second direction D2. As an optional embodiment, the fourth groove 131 includes a V-shaped groove or an arc-shaped groove. The V-shaped groove or arc-shaped groove of the fourth groove 131 can absorb tolerances in the height direction and can be stably positioned. The second rolling member 172 is located between the third groove 154 and the fourth groove 131.

[0078] The second rolling member 172 is located in the fourth groove 131. The second rolling member 172 is capable of rolling within the fourth groove 131. The second rolling member 172 is capable of rolling within the fourth groove 131 along the extending direction of the fourth groove 131. The second rolling member 172 is capable of rolling within the fourth groove 131 along a second direction D2. The second rolling member 172 is capable of rolling relative to the second connecting member 130. Therefore, planar tolerances can be stably absorbed, and rolling friction reduces transmission resistance, making it easy to manufacture.

[0079] The third groove 154 and the fourth groove 131 clamp the second rolling member 172, thereby preventing the second rolling member 172 from disengaging. Furthermore, a certain gap exists between the lead screw nut 203 and the heated bed connector 201, smaller than the space required in the height direction for the second rolling member 172 to disengage from the third groove 154 and the fourth groove 131. This ensures that even without gravity constraints, the connecting assembly 100 cannot separate as the heated bed connector 201 moves along the height direction of the 3D printer, while also preventing manufacturing errors from causing assembly failures.

[0080] The constraint force may include a second force, the direction of which is parallel to the second direction D2. When the moving member 150 is subjected to the second force, it can shift, moving relative to the second connecting member 130. Under the force of the moving member 150, the second rolling member 172 moves in the third groove 154 along the second direction D2, thereby absorbing the force of the second direction D2. Similarly, when the heated bed connector 201 is subjected to the second force, the first connecting member 173 can shift, the second connecting member 130 moves relative to the moving member 150, and the second rolling member 172 moves in the fourth groove 131 along the second direction D2, thereby absorbing the force of the second direction D2. This achieves parallel decoupling in the Y direction.

[0081] In a preferred embodiment, the second surface 152 is provided with at least two third grooves 154, and the second connecting member 130 is provided with at least two fourth grooves 131. The at least two third grooves 154 correspond to the at least two fourth grooves 131 respectively. The at least two third grooves 154 are arranged in parallel. The at least two fourth grooves 131 are arranged in parallel. The third grooves 154 and the fourth grooves 131 are arranged in parallel. This allows for stable torque transmission. The connecting assembly 100 includes at least two second rolling members 172, each located in one of the at least two third grooves 154 and each located in one of the at least two fourth grooves 131.

[0082] In the embodiments shown in Figures 4 and 5, the second surface 152 is provided with three third grooves 154, and the second connecting member 130 is provided with three fourth grooves 131. The three third grooves 154 correspond to the three fourth grooves 131 respectively. The three third grooves 154 are arranged in parallel. The three fourth grooves 131 are arranged in parallel. The connecting assembly 100 includes three second rolling members 172, which are respectively located in the three third grooves 154 and the three fourth grooves 131. Of course, the number of third grooves 154, fourth grooves 131, and second rolling members 172 can be adjusted, for example, to two, four, or more; this embodiment does not limit this.

[0083] The second connecting member 130 includes a first part 132 and a second part 133, which are connected together. The second part 133 is located outside the first part 132 along the radial direction of the lead screw. As an optional embodiment, the first part 132 and the second part 133 are integrally formed. The first part 132 and the second part 133 can be integrally formed by casting. The second connecting member 130 can be made of a metal material such as steel to transmit torque well. As another optional embodiment, the first part 132 and the second part 133 are connected by a connector. The first part 132 is connected to the lead screw 202. The first part 132 is drivenly connected to the lead screw 202 through the second connector 174 and can move along the axial direction of the lead screw 202 as the lead screw 202 rotates, thereby changing its position. The second part is provided with a fourth guide structure. Preferably, the second part 133 is provided with a fourth groove 131.

[0084] The first connecting member 110 is provided with a first through hole 181. The second connecting member 130 is provided with a second through hole 182. Preferably, the first part 132 is provided with a second through hole 182. The moving member 150 is provided with a moving through hole 183. The first through hole 181, the second through hole 182, and the moving through hole 183 are all corresponding. The lead screw nut 203 is provided with a lead screw hole 205. The position of the first through hole 181 corresponds to the position of the lead screw hole 205. The lead screw 202 passes through the first through hole 181. The position of the second through hole 182 can correspond to the position of the lead screw hole 205. The lead screw 202 passes through the second through hole 182. The position of the moving through hole 183 corresponds to the position of the lead screw hole 205. The lead screw 202 passes through the moving through hole 183. The lead screw 202 passes through the lead screw hole 205. The lead screw 202 is threadedly connected to the lead screw hole 205, so that the rotation of the lead screw 202 drives the lead screw nut 203 to move along the axial direction of the lead screw 202. The transmission method of the lead screw 202 rotating to drive the lead screw nut 203 in this application is similar to the existing transmission method of the lead screw 202 rotating to drive the lead screw nut 203, and will not be described in detail in this embodiment.

[0085] The lead screw 202 also passes through a first through hole 181, the diameter of which is larger than the diameter of the lead screw 202. This allows the lead screw 202 to move within the first through hole 181. Preferably, the lead screw 202 can move along a first direction D1 within the first through hole 181. The lead screw 202 can also move along a second direction D2 within the first through hole 181. The lead screw 202 also passes through a second through hole 182, the diameter of which is larger than the diameter of the lead screw 202. This allows the lead screw 202 to move within the second through hole 182. Preferably, the lead screw 202 can move along the first direction D1 within the second through hole 182. The lead screw 202 can also move along the second direction D2 within the second through hole 182. The lead screw 202 also passes through a movable through hole 183, the diameter of which is larger than the diameter of the lead screw 202. This allows the lead screw 202 to move within the movable through hole 183. Preferably, the lead screw 202 is movable along a first direction D1 in the movable through hole 183. The lead screw 202 is movable along a second direction D2 in the movable through hole 183.

[0086] When the connecting assembly 100 is assembled to the 3D printer, the first connecting member 110, the second connecting member 130, and the moving member 150 need to be fixed together first to facilitate assembly. Referring to Figure 2, the first connecting member 110, the second connecting member 130, and the moving member 150 are all detachably connected to the pre-assembly 206. The pre-assembly 206 is locked during the assembly of the first connecting member 110, the second connecting member 130, and the moving member 150, ensuring that the first connecting member 110, the second connecting member 130, and the moving member 150 are concentric and will not move, thus completing the assembly and preventing movement from obstructing the decoupled motion clearance. After assembly, the pre-assembly 206 is separated from the first connecting member 110, the second connecting member 130, and the moving member 150 and can be reused.

[0087] The first connecting member 110 includes a first pre-installation hole 175, in which the pre-installed component 206 passes. The second connecting member 130 includes a second pre-installation hole 177, in which the pre-installed component 206 passes. The first pre-installation hole 175 and the second pre-installation hole 177 correspond to each other. The first pre-installation hole 175 and the second pre-installation hole 177 correspond to each other along the axial direction of the lead screw 202. The moving member 150 includes a moving pre-installation hole 176, in which the pre-installed component 206 passes. The moving pre-installation hole 176 corresponds to the first pre-installation hole 175. The moving pre-installation hole 176 corresponds to the second pre-installation hole 177. The moving pre-installation hole 176 and the first pre-installation hole 175 correspond to each other along the axial direction of the lead screw 202. The moving pre-installation hole 176 and the second pre-installation hole 177 correspond to each other along the axial direction of the lead screw 202.

[0088] Pre-installed component 206 is detachably connected to the first pre-installed hole 175. Pre-installed component 206 is detachably connected to the second pre-installed hole 177. Pre-installed component 206 is detachably connected to the movable pre-installed hole 176. Pre-installed component 206 passes sequentially through the first pre-installed hole 175, the movable pre-installed hole 176, and the second pre-installed hole 177 along the axial direction of the lead screw 202. Pre-installed component 206 first fixes the first connecting member 110, the second connecting member 130, and the movable member 150 together, thereby facilitating assembly into the connecting assembly 100. When the connecting assembly 100 is in normal use, pre-installed component 206 is detached from the first connecting member 110, the second connecting member 130, and the movable member 150, and gravity causes the first connecting member 110 to press against the second connecting member 130 to achieve connection.

[0089] This application also provides a 3D printer, which includes a heated bed connector 201, a heated bed lifting assembly and the aforementioned connecting assembly 100, wherein a first connecting member 110 is connected to the heated bed connector 201 and a second connecting member 130 is connected to the heated bed lifting assembly.

[0090] According to the 3D printer of this application, the 3D printer includes a heated bed connector 201, a heated bed lifting assembly, and the aforementioned connecting assembly 100. A first connecting member 110 is connected to the heated bed connector 201, and a second connecting member 130 is connected to the heated bed lifting assembly. The connecting assembly 100 includes a first connecting member 110, a second connecting member 130, and a moving member 150. The first connecting member 110 is connected to the heated bed connector 201, the second connecting member 130 is connected to the heated bed lifting assembly, and the moving member 150 is located between the first connecting member 110 and the second connecting member 130. The moving member 150 is movable relative to the first connecting member 110 and the second connecting member 130 along a first plane, which is perpendicular to the height direction. In this way, the connecting component 100 is easy to manufacture, the connecting component 100 can stably transmit the power transmission of the heated bed lifting component, the connecting component 100 can stably transmit the power transmission of the heated bed lifting component to the heated bed connector 201, the moving component 150 can effectively transmit torque, and can also realize movement along the first plane perpendicular to the height direction. While ensuring stable transmission of height direction movement, the movement along the first plane perpendicular to the height direction eliminates tolerances and fluctuations, making the movement more precise.

[0091] 3D printers utilize FDM (Fused Deposition Modeling) technology for printing. A 3D printer consists of a tool head and a heated bed. The tool head is movable. When the tool head moves to a preset position, it heats and melts a filament of thermoplastic material, extruding it through the nozzles of the tool head and stacking it layer by layer from bottom to top on the heated bed to build the object. The tool head includes an extrusion assembly and a hot end. The extrusion assembly delivers the printing material supplied to the 3D printer by the feeding device to the hot end, which heats the printing material to a molten state and extrudes the molten material onto the heated bed.

[0092] For example, the hot end includes heat sink fins, a nozzle, and a throat located between the heat sink fins and the nozzle. The printing material passes sequentially through the heat sink fins, the throat, and the nozzle. Specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrudes the molten printing material onto the heated bed.

[0093] The 3D printer also includes a heated bed lifting assembly and a heated bed connector 201. The heated bed lifting assembly is connected to the heated bed via the heated bed connector 201. The heated bed lifting assembly adjusts the position of the heated bed along the height direction of the 3D printer. The height direction of the heated bed lifting assembly is parallel to the height direction of the 3D printer. The tool head can move along the height direction of the heated bed lifting assembly to achieve material stacking. During the movement along the printing path, the nozzle extrudes molten printing material layer by layer at different locations on the heated bed, thereby printing a three-dimensional object.

[0094] As shown in Figure 1, the heated bed lifting assembly can drive the heated bed to move along the height direction of the 3D printer. The heated bed lifting assembly includes a lead screw 202, which drives the heated bed to move. The assembly also includes an optical axis, which is arranged parallel to the lead screw 202. The 3D printer also includes a pulley connected to the lead screw 202. Rotation of the pulley drives the lead screw 202 to rotate. A retaining pin is provided at the bottom end of the lead screw 202. The retaining pin can be connected to the axis of the pulley. The cross-sectional shape of the retaining pin can be constructed as the letter "3D". Rotation of the pulley drives the retaining pin to rotate, thereby driving the lead screw 202 to rotate. The pulley can be connected to the connecting assembly 100 to prevent it from falling off. The tool head is movably connected to the lead screw 202, and the optical axis guides the movement of the tool head. The optical axis is connected to the connecting assembly 100. The bottom end of the optical axis is connected to the connecting assembly 100.

[0095] The 3D printer also includes a chamber in which a tool head and a heated bed are disposed. One end of the heated bed connector 201 is connected to the heated bed lifting assembly. Preferably, the heated bed connector 201 is located below the heated bed. The heated bed connector 201 is located below the heated bed along the height direction of the 3D printer. The other end of the heated bed connector 201 is connected to the heated bed. In this embodiment, "bottom surface of the heated bed" refers to the surface of the heated bed facing the bottom of the 3D printer.

[0096] The lead screw 202 is equipped with a lead screw nut 203, which is connected to the heated bed connector 201. The lead screw nut 203 can move along the height direction of the lead screw 202, thereby driving the heated bed connector 201 to move along the height direction of the lead screw 202. The optical shaft is equipped with a linear bearing, which is connected to the heated bed connector 201. The linear bearing guides the heated bed connector 201 as it moves along the height direction of the lead screw 202. The connecting assembly 100 connects the heated bed connector 201 and the heated bed lifting assembly. The connecting assembly 100 can absorb the constraint forces in different directions experienced by the heated bed during movement.

[0097] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” appearing herein can refer to one component being directly attached to another component or one component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0098] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A connecting assembly for a 3D printer, the 3D printer further comprising a hot bed, a hot bed connecting member, and a hot bed lifting assembly, the hot bed lifting assembly being connected with the hot bed through the hot bed connecting member, the hot bed lifting assembly being capable of driving the hot bed to move along a height direction of the 3D printer, characterized in that, The connecting assembly comprises: a first connecting member connected to the hot bed connecting piece; a second connecting member connected to the hot bed lifting assembly; and a moving member between the first connecting member and the second connecting member, wherein the moving member is movable along a first plane relative to the first connecting member and the second connecting member, and the first plane is perpendicular to the height direction.

2. The connection assembly of claim 1, wherein, The connecting assembly comprises a first rolling member, the moving member comprises a first surface provided with a first guide structure, the first rolling member is connected with the first guide structure in a matching mode, and the first rolling member is rollable along a first direction relative to the moving member.

3. The connection assembly of claim 2, wherein, The first connecting member is provided with a second guide structure, the first rolling member is between the first guide structure and the second guide structure, and the first rolling member is rollable along the first direction relative to the first connecting member.

4. The connection assembly of claim 3, wherein, The first guide structure and / or the second guide structure comprises a groove, and the first rolling member is a steel ball.

5. The connection assembly of claim 1, wherein, The connecting assembly comprises a second rolling member, the moving member comprises a second surface provided with a third guide structure, the second rolling member is connected with the third guide structure in a matching mode, and the second rolling member is rollable along a second direction relative to the moving member.

6. The connection assembly of claim 5, wherein, The second connecting member is provided with a fourth guide structure, the second rolling member is between the third guide structure and the fourth guide structure, and the second rolling member is rollable along the second direction relative to the second connecting member.

7. The connection assembly of claim 6, wherein, The third guide structure and / or the fourth guide structure comprises a groove, and the second rolling member is a steel ball.

8. The connection assembly of claim 6, wherein, The hot bed lifting assembly further comprises a lead screw, the second connecting member comprises a first part and a second part, the first part is connected to the lead screw, the second part is provided with the fourth guide structure, the first part is further provided with a through hole, the lead screw is arranged in the through hole, the diameter of the through hole is greater than the diameter of the lead screw, the first part and the second part are integrally formed, or the first part and the second part are connected through a connecting piece.

9. The connection assembly of claim 1, wherein, The moving member is provided with a first guide structure and a third guide structure, the first connecting member is provided with a second guide structure, the second connecting member is provided with a fourth guide structure, the connecting assembly further comprises a first rolling member and a second rolling member, at least one of the first guide structure, the second guide structure, the third guide structure and the fourth guide structure comprises a V-shaped groove or an arc-shaped groove, the first rolling member and / or the second rolling member is configured as a steel ball, and / or the staggered angle between the first guide structure and the third guide structure is 90°.

10. The connection assembly of claim 1, wherein, The first connecting member is above the moving member along the height direction of the hot bed lifting assembly, and the second connecting member is below the moving member along the height direction of the hot bed lifting assembly.

11. The connection assembly of claim 1, wherein, The connection assembly further comprises a first connection piece for fixing the first connection member and the hot bed connection piece, and a second connection piece for fixing the second connection member and the hot bed lifting assembly.

12. A 3D printer characterized by, The 3D printer comprises a hot bed connection piece, a hot bed lifting assembly and the connection assembly according to any one of claims 1-11, the first connection member is connected to the hot bed connection piece, and the second connection member is connected to the hot bed lifting assembly.

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