3D printer convenient to disassemble and maintain

Abstract

The application provides a 3D printer convenient to disassemble and maintain, which comprises an outer shell, a hot bed assembly, a motion mechanism and a printing nozzle arranged in the outer shell, the printing nozzle is connected with the motion mechanism, and the printing nozzle is located above the hot bed assembly. The motion mechanism comprises a lifting driving assembly, a lifting frame, a transverse beam, a first XY driving assembly and a second XY driving assembly arranged on the lifting frame. The lifting driving assembly is arranged on the inner circumferential side of the outer shell, and the lifting driving assembly comprises a lifting block. The lifting frame is detachably connected with the lifting block. The printing nozzle is slidably arranged on the transverse beam in the X direction. The motion mechanism and the printing nozzle of the application can be assembled or disassembled externally. When assembled into an independent module, the whole can be directly assembled on the lifting block, thereby conveniently loaded on the lifting driving assembly, and the disassembly and maintenance are convenient, and the disassembly and maintenance efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printers, and in particular to a 3D printer that is easy to disassemble and maintain. Background Technology

[0002] Current 3D printers typically employ a gantry or box-type structure, making component assembly / disassembly and product handling inconvenient. For example, components such as the print head, transverse beam, and lifting mechanism are often installed piecemeal within the printer's casing, requiring disassembly of each component individually. During assembly and disassembly, operators must work within the confined space inside the casing, making assembly and maintenance difficult, alignment adjustments challenging, and overall disassembly efficiency low.

[0003] Therefore, there is a need to provide a 3D printer that is easy to disassemble and maintain in order to solve the above-mentioned technical problems. Summary of the Invention

[0004] This invention provides a 3D printer that is easy to disassemble and maintain, in order to solve the problems of inconvenient disassembly and assembly and low disassembly and assembly efficiency of existing 3D printers.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a 3D printer that is easy to disassemble and maintain, comprising: an outer shell and a heated bed assembly, a motion mechanism and a printing nozzle disposed in the outer shell, wherein the printing nozzle is connected to the motion mechanism, the motion mechanism is used to drive the printing nozzle to move its position, and the printing nozzle is located above the heated bed assembly; The motion mechanism includes: A lifting drive assembly is disposed on the inner peripheral side of the housing, and the lifting drive assembly includes a lifting block; The lifting frame is detachably connected to the lifting block: A transverse beam is slidably mounted on the lifting frame along the Y direction, and the printing nozzle is slidably mounted on the transverse beam along the X direction; A first XY drive assembly is mounted on the lifting frame, and the output end of the first XY drive assembly is connected to the print head; and A second XY drive assembly is mounted on the lifting frame. The output end of the second XY drive assembly is connected to the print head. The second XY drive assembly, together with the first XY drive assembly, drives the print head to slide along the X direction and drives the transverse beam to slide along the Y direction.

[0006] In this invention, the 3D printer that is easy to disassemble and maintain includes four lifting drive components, which are respectively disposed at the four corners of the outer casing. The top of the lifting block is provided with a connecting column, and the lifting frame is provided with a connecting hole for connecting with the connecting column.

[0007] In this invention, the lifting drive assembly further includes a lifting drive motor, a fixed base, a lead screw, a lifting sensor, and a lifting sensing plate; The motor is fixedly connected to the outer casing via the fixed base. The lead screw is connected to the output end of the motor. The lifting block is driven by the lead screw and is slidably connected to the inner wall of the outer casing. The lifting sensing plate is fixedly connected to the bottom of the lifting block. The lifting sensor is fixedly connected to one side of the fixed base. The lifting sensor is used to sense the lifting position of the lifting sensing plate. One end of the connecting column is movably connected to the connecting hole via a spherical bearing.

[0008] In this invention, the first XY drive assembly includes a first drive motor, a first belt, and a plurality of first pulleys. The first drive motor is fixedly connected to the lifting frame, the plurality of first pulleys are disposed on the lifting frame, the output shaft of the first drive motor is drivenly connected to one of the first pulleys, and the first belt is wound between the plurality of first pulleys to form a first annular loop. The second XY drive assembly includes a second drive motor, a second belt, and a plurality of second pulleys. The second drive motor is fixedly connected to the lifting frame, and the plurality of second pulleys are disposed on the lifting frame. The output shaft of the second drive motor is drivenly connected to one of the second pulleys, and the second belt is wound between the plurality of second pulleys to form a second annular loop. The first annular loop includes a first quadrilateral segment and a first extension segment. The first quadrilateral segment is wound around four first pulleys, and the first extension segment is wound around one of the first pulleys other than the first quadrilateral segment. The second annular loop includes a second quadrilateral segment and a second extension segment. The second quadrilateral segment is wound around four second pulleys, and the second extension segment is wound around one of the second pulleys other than the second quadrilateral segment. The first extension segment and the second extension segment are respectively located at both ends of the transverse beam. One side of the first quadrilateral is the first nozzle connection segment, which is fixedly connected to the printing nozzle. The first nozzle connection segment is located between the first extension segment and the second extension segment. One side of the second quadrilateral is the second nozzle connection segment, which is fixedly connected to the printing nozzle. The second nozzle connection segment is located between the first extension segment and the second extension segment. When the first drive motor and the second drive motor rotate in the same direction, the resultant force generated by the first printhead connecting section and the second printhead connecting section on the printhead drives the printhead to move along the X-axis. When the first drive motor and the second drive motor rotate in opposite directions, the combined force generated by the first printhead connecting section and the second printhead connecting section on the printhead drives the transverse beam to move along the Y-axis.

[0009] Both the first XY drive assembly and the second XY drive assembly include a tensioning structure, which includes a fixed block, a movable seat, a tensioning spring, a tensioning pulley, and an adjusting screw. The fixed block is fixedly mounted on the lifting frame. The movable seat is provided with a groove. The fixed block is located in the groove, and the movable seat and the fixed block form a sliding fit. The adjusting screw passes through one side of the movable seat and is threadedly connected to the fixed block. The tension pulley is located on the other side of the movable seat. The tension spring is sleeved on the adjusting screw and is located between the fixed block and the inner wall of the groove. The tension spring is used to drive the movable seat to move away from the tension pulley. The first belt forms a V-shaped structure around the tension pulley and the two first pulleys, and the sliding trajectory of the movable seat is parallel to the side segment of one side of the first quadrilateral segment; The second belt forms a V-shaped structure around the tension pulley and the two second pulleys, and the sliding trajectory of the movable seat is parallel to the side segment of one side of the second quadrilateral segment.

[0010] In this invention, the lifting frame includes three main rods, two intermediate connecting frames, and two end connecting frames; The three main rods are connected in a U-shaped structure, wherein the two ends of the main rod in the middle are respectively connected to the main rods on both sides through a middle connecting frame, and the free ends of the main rods on both sides are respectively provided with an end connecting frame; One of the intermediate connecting frames is provided with the first drive motor and a set of the tensioning structures, and the other intermediate connecting frame is provided with the second drive motor and a set of the tensioning structures; Both the intermediate connecting frame and the end connecting frame are provided with connection holes for connecting to the lifting block; The transverse beam is slidably connected to the two main rods via a sliding connecting frame. The first pulley and the second pulley are provided on the intermediate connecting frame, the end connecting frame, and the sliding connecting frame.

[0011] In this invention, the outer bottom of the outer shell is connected to two connectors, and a connecting groove is formed between the two connectors. The 3D printer, which is easy to disassemble and maintain, also includes an electrical control box for setting electrical control devices, and the electrical control box is slidably connected to the connecting groove.

[0012] In this invention, the 3D printer that is easy to disassemble and maintain also includes a hot air blower. The hot air blowers are symmetrically arranged on opposite sides of the heated bed assembly, and the hot air blowers on both sides are tilted towards the upper area of ​​the heated bed assembly.

[0013] In this invention, the outer casing is provided with an air inlet structure and an air outlet structure; The air intake structure includes an air inlet, an air intake plate for closing the air inlet, and an air intake drive assembly. The air inlet is disposed on the outer shell, the air intake plate is rotatably connected to the outer shell, and the air intake plate is drively connected to the output end of the air intake drive assembly. The air outlet structure includes an air outlet mounting port, an air outlet module, and an air outlet drive assembly. The air outlet mounting port is disposed on the outer casing. The air outlet module is movably disposed at the air outlet mounting port. An exhaust fan is disposed inside the air outlet module. An air intake port and an exhaust port are disposed on both sides of the air outlet module. The air outlet module is connected to the output end of the air outlet drive assembly. The air outlet drive assembly is used to drive the air outlet module to move, so as to control the exhaust port to be exposed outside the air outlet mounting port.

[0014] In this invention, an operation opening is provided on one side of the outer shell. The 3D printer that is easy to disassemble and maintain also includes a door. The door is used to close the operation opening. The operation opening extends on the vertical side and top surface of the outer shell. The operation opening at least covers part of the top surface of the outer shell. The door has an L-shaped structure, and one end of the door is rotatably connected to the top of the outer shell. The inner bottom surface of the outer casing is provided with a sliding groove, the sliding groove extending in the direction of the operating opening. The heated bed assembly is slidably fitted in the sliding groove. A positioning hole is provided in the sliding groove. A positioning pin is provided on the heated bed assembly for positioning and engaging with the positioning hole. At least one end of the heated bed assembly near the operating opening is detachably slidably fitted in the sliding groove. When one end of the heated bed assembly disengages from the sliding groove to a set degree, the positioning pin disengages from the positioning hole. At least two positioning blocks for positioning the heated bed assembly are provided in the sliding groove.

[0015] Compared to existing technologies, the advantages of this invention are as follows: The 3D printer of this invention, which is easy to disassemble and maintain, can externally assemble the lifting frame, transverse beam, printing nozzle, first XY drive assembly, and second XY drive assembly into an independent motion mechanism module, and then load it onto the lifting block inside the outer shell after debugging. This reduces assembly difficulty, increases disassembly and assembly efficiency, and makes disassembly, assembly, and maintenance convenient.

[0016] The 3D printer of the present invention, which is easy to disassemble and maintain, is equipped with multiple lifting drive components, each of which independently controls the lifting. At the same time, the connecting column on the lifting block is connected to the lifting frame through a joint bearing. Then, with the real-time detection of the position of the lifting block by the lifting sensor, the lifting frame is driven to lift and lower at different heights at different positions, realizing automatic leveling, high assembly fault tolerance, and higher assembly convenience and efficiency.

[0017] The 3D printer of this invention, which is easy to disassemble and maintain, also achieves compound movement of the print head in the X and Y directions by setting up a first XY drive assembly and a second XY drive assembly. This results in a compact structure, stable transmission, reduced overall weight, and further facilitates modular assembly and disassembly. Simultaneously, a tensioning structure is provided, allowing for convenient adjustment of the tension of the first and second belts, effectively avoiding transmission errors caused by belt slack and ensuring the movement accuracy of the print head.

[0018] In addition, a convenient push-pull electrical control box is provided to improve the ease of connecting or disconnecting wires. A pull-out, movable heated bed assembly allows for easy removal of the product after printing without having to delve into the outer casing, enhancing usability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of the 3D printer of the present invention, which is easy to disassemble and maintain.

[0021] Figure 2 This is a schematic diagram of the internal structure of the 3D printer of the present invention, which is easy to disassemble and maintain.

[0022] Figure 3 This is a schematic diagram of the motion mechanism in this invention.

[0023] Figure 4 This is a partial structural diagram of the lifting drive assembly and the lifting frame in this invention.

[0024] Figure 5 This is a schematic diagram of the structure of the first XY drive component and the first XY drive component in this invention.

[0025] Figure 6 for Figure 5 A partial structural diagram of the tensioning structure at the left middle end.

[0026] Figure 7 for Figure 5 The diagram shows the structure of the first XY drive component and another view of the first XY drive component.

[0027] Figure 8 This is a schematic diagram of the structure of the first belt and the second belt connecting the print head in this invention.

[0028] Figure 9 This is a schematic diagram of the bottom view of the 3D printer in this invention, which is easy to disassemble and maintain.

[0029] Figure 10 This is a schematic diagram of the air intake structure in this invention.

[0030] Figure 11 This is a schematic diagram of the air outlet structure in this invention.

[0031] Figure 12 This is a schematic diagram of the structure of the heated bed assembly in this invention when it is pulled out.

[0032] Figure 13 for Figure 12 A schematic diagram of the local structure at the positioning block.

[0033] Figure 14 This is a schematic diagram of the heated bed assembly from the bottom view in this invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0036] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Existing 3D printers suffer from inconvenience in disassembling and assembling parts and in handling products.

[0039] The following is a preferred embodiment of a 3D printer that is easy to disassemble and maintain and solves the above-mentioned technical problems, provided by the present invention.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 In the diagram, units with similar structures are represented by the same labels.

[0041] This embodiment provides a 3D printer that is easy to disassemble and maintain, comprising: a housing 11, and a heated bed assembly 12, a motion mechanism 14, and a print head 15 disposed within the housing 11. The print head 15 is connected to the motion mechanism 14, which is used to move the print head 15 to a different position. The print head 15 is located above the heated bed assembly 12. The print head 15 moves above the heated bed assembly 12 to perform printing operations.

[0042] Please refer to Figure 3 The motion mechanism 14 in this embodiment includes: a lifting drive assembly 141, a lifting frame 142, and a transverse beam 143, a first XY drive assembly 144, and a second XY drive assembly 145 disposed on the lifting frame 142.

[0043] The lifting drive assembly 141 is disposed on the inner peripheral side of the housing 11, and the lifting drive assembly 141 includes a lifting block 1411.

[0044] The lifting frame 142 is detachably connected to the lifting block 1411.

[0045] The transverse beam 143 is slidably mounted on the lifting frame 142 along the Y direction, and the printing nozzle 15 is slidably mounted on the transverse beam 143 along the X direction.

[0046] The first XY drive assembly 144 is mounted on the lifting frame 142, and the output end of the first XY drive assembly 144 is connected to the print head 15.

[0047] The second XY drive assembly 145 is mounted on the lifting frame 142. The output end of the second XY drive assembly is connected to the print head 15. The second XY drive assembly 145 works in conjunction with the first XY drive assembly 144 to drive the print head 15 along the X direction and drive the transverse beam 143 to slide along the Y direction.

[0048] The motion mechanism 14 in this embodiment adopts a modular arrangement, which can externally assemble the lifting frame 142, the transverse beam 143, the printing nozzle 15, the first XY drive component 144, and the second XY drive component 145 into an independent motion mechanism module, and then load the whole into the outer shell 11, which reduces the assembly difficulty, improves the disassembly and assembly efficiency, and makes disassembly, assembly, and maintenance convenient.

[0049] Please refer to Figure 3 In this embodiment, the 3D printer that is easy to disassemble and maintain specifically includes four lifting drive components 141. The four lifting drive components 141 are respectively arranged at the four corners inside the outer shell 11, which can provide stable support for the lifting frame 142 and drive it to lift.

[0050] Please refer to Figure 2 In this embodiment, the outer shell 11 includes a main frame 112, with the main frame 112 surrounding the outer shell side plates. The main frame 112 includes two rectangular side frames 1121 and a transverse rod 1122 connecting the two side frames 1121. A lifting drive assembly 141 is fixedly installed at one corner inside the side frame 1121 via a fixing seat 1413, and the lifting block 1411 is slidably connected to the inner wall of the side frame 1121. For example, a guide rail 148 can be provided on the inner side of the outer shell 11, and the lifting block 1411 is slidably connected to the guide rail 148.

[0051] Please refer to Figure 3 and Figure 4 The lifting block 1411 has a connecting column 1415 on its top, and the lifting frame 142 has a connecting hole for connecting with the connecting column 1415. The connection between the connecting column 1415 and the connecting hole facilitates the positioning and connection between the lifting frame 142 and the lifting block 1411.

[0052] In this embodiment, the lifting drive assembly 141 further includes a lifting drive motor 1412, a fixed base 1413, a lead screw 1414, a lifting sensor 1416, and a lifting sensing plate 1417.

[0053] The motor is fixedly connected to the outer casing 11 via the fixed base 1413. The lead screw 1414 is connected to the output end of the motor. The lifting block 1411 is connected to the lead screw 1414 via transmission, and the lifting block 1411 is slidably connected to the inner wall of the outer casing 11. The lifting sensing plate 1417 is fixedly connected to the bottom of the lifting block 1411. The lifting sensor 1416 is fixedly connected to one side of the fixed base 1413. The lifting sensor 1416 is used to sense the lifting position of the lifting sensing plate 1417. One end of the connecting column 1415 is movably connected to the connecting hole via the spherical bearing 146. The spherical bearing 146 enables the connecting column 1415 and the connecting hole to swing and tilt in any direction within a certain angle range.

[0054] By using the lifting sensor 1416 to detect the position of the lifting block 1411 in real time, and in conjunction with the connection of the connecting column 1415 and the joint bearing 146, the lifting frame 142 can be driven to lift at different heights at different positions, achieving automatic leveling, high assembly tolerance, and higher assembly convenience and efficiency.

[0055] Please refer to Figure 3 , Figure 5 and Figure 7 In this embodiment, the first XY drive assembly 144 includes a first drive motor 1441, a first belt 1442, and a plurality of first pulleys 1443. The first drive motor 1441 is fixedly connected to the lifting frame 142, and the plurality of first pulleys 1443 are disposed on the lifting frame 142. The output shaft of the first drive motor 1441 is connected to one of the first pulleys 1443 for transmission. The first belt 1442 is wound around the plurality of first pulleys 1443 to form a first annular loop.

[0056] The second XY drive assembly 145 includes a second drive motor 1451, a second belt 1452, and a plurality of second pulleys 1453. The second drive motor 1451 is fixedly connected to the lifting frame 142, and the plurality of second pulleys 1453 are disposed on the lifting frame 142. The output shaft of the second drive motor 1451 is connected to one of the second pulleys 1453 for transmission. The second belt 1452 is wound between the plurality of second pulleys 1453 to form a second annular loop.

[0057] The first annular loop includes a first quadrilateral segment 14421 and a first extension segment 14422. The first quadrilateral segment 14421 is wound around four first pulleys 1443, and the first extension segment 14422 is wound around a first pulley 1443 other than the first quadrilateral segment 14421. The second annular loop includes a second quadrilateral segment 14521 and a second extension segment 14522. The second quadrilateral segment 14521 is wound around four second pulleys 1453, and the second extension segment 14522 is wound around a second pulley 1453 other than the second quadrilateral segment 14521.

[0058] The first extension segment 14422 and the second extension segment 14522 are located at both ends of the transverse beam 143, respectively. One side of the first quadrilateral is the first nozzle connection segment 14423, which is fixedly connected to the print head 15. The first nozzle connection segment 14423 is located between the first extension segment 14422 and the second extension segment 14522. One side of the second quadrilateral is the second nozzle connection segment 14523, which is fixedly connected to the print head 15. The second nozzle connection segment 14523 is located between the first extension segment 14422 and the second extension segment 14522.

[0059] With the configuration of the first XY drive assembly 144 and the second XY drive assembly 145, the first nozzle connection section 14423 and the second nozzle connection section 14523 can work together on the printing nozzle 15 and drive the transverse beam 143 to move, thus realizing the composite movement of the printing nozzle 15 in the X and Y directions.

[0060] The first extension section 14422 and the second extension section 14522 each include two parallel and oppositely running belt segments. This ensures that when the transverse beam 143 moves, the travel of the two opposite belt segments of the first extension section 14422 and the second extension section 14522 cancels each other out, and the first belt 1443 and the second belt 1453 can always remain taut.

[0061] When the first drive motor 1441 and the second drive motor 1451 rotate in the same direction, the combined force generated by the first printhead connecting section 14423 and the second printhead connecting section 14523 on the printhead 15 drives the printhead 15 to move along the X-axis.

[0062] When the first drive motor 1441 and the second drive motor 1451 rotate in opposite directions, the pulling forces of the first printhead connecting section 14423 and the second printhead connecting section 14523 on the printhead 15 are opposite, and they cannot pull the printhead 15 to move. Instead, the resultant force generated by the two will drive the transverse beam 143 to move, thereby enabling the printhead 15 to move along the Y-axis.

[0063] There are two scenarios where the first drive motor 1441 and the second drive motor 1451 rotate in opposite directions: the first drive motor 1441 rotates forward while the second drive motor 1451 rotates in reverse, and the first drive motor 1441 rotates in reverse while the second drive motor 1451 rotates forward. In both scenarios, the printing nozzle 15 moves forward or backward along the Y-axis.

[0064] Understandably, both the sliding of the print head along the X-axis and the sliding of the transverse beam 143 along the Y-axis are equipped with corresponding sensors to detect their sliding positions.

[0065] Please refer to Figure 8In this embodiment, the first printhead connecting section 14423 and the second printhead connecting section 14523 are clamped between the same pressure plate 151 and the printhead 15. The pressure plate 151 can be fixedly connected to the printhead 15 using screws.

[0066] Please refer to Figure 5 and Figure 6 The first XY drive assembly 144 and the second XY drive assembly 145 both include a tensioning structure 147. The tensioning structure 147 includes a fixed block 1471, a movable seat 1472, a tension spring, a tension pulley 1473, and an adjusting screw 1474. By setting the tensioning structure 147, the tension of the first belt 1442 and the second belt 1452 can be easily adjusted, effectively avoiding transmission errors caused by belt slack and ensuring the movement accuracy of the print head 15.

[0067] Please refer to Figure 6 Specifically, the fixed block 1471 is fixedly mounted on the lifting frame 142, and the movable seat 1472 is provided with a groove 14721. The fixed block 1471 is located inside the groove 14721, and the movable seat 1472 and the fixed block 1471 form a sliding fit. The adjusting screw 1474 passes through one side of the movable seat 1472 and is threadedly connected to the fixed block 1471. The tension pulley 1473 is provided on the other side of the movable seat 1472, and the tension spring is sleeved on the adjusting screw 1474 and located between the fixed block 1471 and the inner wall of the groove 14721. The tension spring is used to drive the movable seat 1472 to move away from the tension pulley 1473.

[0068] By turning the adjusting screw 1474 in conjunction with the tensioning spring, the position of the tensioning pulley 1473 can be easily adjusted, thereby adjusting the belt tension.

[0069] The first belt 1442 forms a V-shaped structure around the tension pulley 1473 and the two first pulleys 1443. The sliding trajectory of the movable seat 1472 is parallel to one side of the first quadrilateral segment, which enables efficient tension adjustment of the belt. The V-shaped structure of the first belt can form a large wrap angle with the first pulley 1443 connected to the first drive motor 1441, improving the stability of power transmission.

[0070] The second belt 1452 forms a V-shaped structure around the tension pulley 1473 and the two second pulleys 1453. The sliding trajectory of the movable seat 1472 is parallel to one side of the second quadrilateral segment. This allows for efficient tension adjustment of the belt. The V-shaped structure of the second belt can form a larger wrap angle with the second pulley 1453 connected to the second drive motor 1451, improving the stability of power transmission.

[0071] Please refer to Figure 3In this embodiment, the lifting frame 142 includes three main rods 1421, two intermediate connecting frames 1422, and two end connecting frames 1423.

[0072] The three main rods 1421 are connected in a U-shape. The two ends of the middle main rod 1421 are connected to the two side main rods 1421 through an intermediate connecting frame 1422. The free ends of the two side main rods 1421 are respectively provided with an end connecting frame 1423. This design reduces the overall weight while ensuring structural strength and facilitates modular assembly and disassembly.

[0073] One intermediate connecting frame 1422 is equipped with a first drive motor 1441 and a set of tensioning structures 147, while the other intermediate connecting frame 1422 is equipped with a second drive motor 1451 and a set of tensioning structures 147. Arranging the first drive motor 1441 and the second drive motor 1451 on the two intermediate connecting frames 1422 respectively makes the structure of the intermediate connecting frames 1422 easier to install and facilitates rational space allocation, improving structural compactness.

[0074] Both the intermediate connecting frame 1422 and the end connecting frame 1423 are provided with connection holes for connecting to the lifting block 1411.

[0075] The transverse beam 143 is slidably connected to the two main rods 1421 via a sliding connecting frame 1424. The intermediate connecting frame 1422, the end connecting frame 1423, and the sliding connecting frame 1424 are provided with a first pulley 1443 and a second pulley 1453.

[0076] More specifically, in this embodiment, the intermediate connecting frame 1422 includes an upper connecting plate 14221 and a lower connecting plate 14222 that are fixedly connected. A fixing block 1471 is fixedly connected between the upper connecting plate 14221 and the lower connecting plate 14222. A movable seat 1472 is slidably disposed between the upper connecting plate 14221 and the lower connecting plate 14222. A first drive motor 1441 is disposed on the side of the lower connecting plate 14222 that is away from the upper connecting plate 14221. A second drive motor 1451 is disposed on the side of the lower connecting plate 14222 that is away from the upper connecting plate 14221.

[0077] The first pulley 1443 connected to the output shaft of the first drive motor 1441, together with another first pulley 1443 and the tension pulley 1473, forms a V-shaped structure. The second pulley 1453 connected to the output shaft of the second drive motor 1451, together with another first pulley 1443 and the tension pulley 1473, forms a V-shaped structure.

[0078] Please refer to Figure 9In this invention, the outer bottom of the outer casing 11 is connected to two connectors 116, forming a connecting groove between the two connectors 116. The 3D printer, facilitating disassembly and maintenance, also includes an electrical control box 19 for housing electrical control components. The electrical control box 19 is slidably connected to the connecting groove. Various drive components, sensing devices, etc., are electrically connected to the electrical control components inside the electrical control box 19 via wire holes. In this embodiment, the ease of connecting or disconnecting wires is improved by providing a conveniently push-pull electrical control box 19.

[0079] Please refer to Figure 2 In this invention, the 3D printer, which is easy to disassemble and maintain, also includes hot air blowers 18. Hot air blowers 18 are symmetrically arranged on opposite sides of the heated bed assembly 12, and the hot air blowers 18 on both sides are tilted towards the upper area of ​​the heated bed assembly 12. Through the position and orientation of the hot air blowers 18, hot air can be uniformly circulated within the printing chamber, resulting in high thermal efficiency.

[0080] Please refer to Figure 2 , Figure 10 and Figure 11 In this embodiment, the outer casing 11 is provided with an air inlet structure 16 and an air outlet structure 17.

[0081] The air intake structure 16 includes an air inlet 161, an air intake plate 162 for closing the air inlet 161, and an air intake drive assembly 163. The air inlet 161 is disposed on the outer casing 11, the air intake plate 162 is rotatably connected to the outer casing 11, and the air intake plate 162 is drively connected to the output end of the air intake drive assembly 163. (The air intake drive assembly 163 drives the air intake plate 162 to rotate, thereby controlling the opening and closing of the air inlet 161 by the air intake plate 162.)

[0082] The air outlet structure 17 includes an air outlet mounting port 171, an air outlet module 172, and an air outlet drive assembly 173. The air outlet mounting port 171 is disposed on the outer casing 11. The air outlet module 172 is movably disposed at the air outlet mounting port 171. An exhaust fan is disposed inside the air outlet module 172. An air intake port 1721 and an exhaust port 1722 are disposed on both sides of the air outlet module 172. The air outlet module 172 is connected to the output end of the air outlet drive assembly 173. The air outlet drive assembly 173 is used to drive the air outlet module 172 to move, so as to control the exhaust port 1722 to be exposed outside the air outlet mounting port 171.

[0083] Specifically, in this embodiment, the air inlet structure 16 is disposed on the bottom of the outer casing 11 near the operation opening 111, and the air outlet structure 17 is disposed on the top of the outer casing 11.

[0084] A first chamber temperature sensor is installed inside the outer casing 11 near the air inlet structure 16. Figure 12The first compartment temperature sensor is blocked by the side frame 1121 (so it is not labeled), and the second compartment temperature sensor 1A is set at the end near the air outlet structure 17.

[0085] The controller can control the air intake of the air intake structure 16 and the air outlet structure 17 by using temperature sensing data from two chamber temperature sensors, so as to maintain the temperature of the printing chamber at a set temperature suitable for printing.

[0086] Please refer to Figure 1 In this embodiment, an operation opening 111 is provided on one side of the outer casing 11. The 3D printer, which facilitates disassembly and maintenance, also includes a door 13. The door 13 is used to close the operation opening 111. The operation opening 111 extends on the vertical side and top surface of the outer casing 11, and at least covers part of the top surface of the outer casing. The door 13 has an L-shaped structure, and one end of the door 13 is rotatably connected to the top of the outer casing. By closing the operation opening 111 with the door 13, the sealing during printing operations can be ensured, while the L-shaped door 13 facilitates opening the operation opening 111 to a greater extent.

[0087] Please refer to Figure 12 The inner bottom surface of the outer casing 11 is provided with a sliding groove 113, the extension direction of the sliding groove 113 is directed towards the operation opening 111, the heated bed assembly 12 is slidably fitted in the sliding groove 113, the sliding groove 113 is provided with a positioning hole 115, the heated bed assembly 12 is provided with a positioning pin 126 for positioning and engaging with the positioning hole 115, at least one end of the heated bed assembly 12 near the operation opening 111 is detachably slidably fitted in the sliding groove 113, when one end of the heated bed assembly 12 is disengaged from the sliding groove 113 to a set degree, the positioning pin 126 disengages from the positioning hole 115, and at least two positioning blocks 114 for positioning the heated bed assembly 12 are provided in the sliding groove 113.

[0088] By incorporating a retractable heated bed assembly 12, the product can be easily removed after printing without needing to penetrate deep into the outer casing 11. Furthermore, the heated bed assembly 12 can be slid out by lifting one end and positioned using a positioning pin 126, positioning block 114, and other structures when pushed in, making the entire operation very convenient.

[0089] In this embodiment, a reinforcing rod 1123 is also provided between the side frames 112, and the reinforcing rod 1123 is horizontally placed at the operation opening 111. Since the operation opening 111 accounts for a large proportion, the reinforcement rod 1123 can improve the strength of the overall structure and avoid minor deformation during handling and transportation, which would affect the printing accuracy.

[0090] It should be noted that because of the reinforcement rod 1123, it is not convenient to take the product out of the operation opening 111. Therefore, this embodiment is provided with a pull-out heated bed assembly 12, so that the product can be easily taken out without going deep into the outer shell 11 after printing, which improves the ease of use.

[0091] Please refer to Figure 3 In this embodiment, two sliding rods 1124 are connected between two horizontal rods 1122 at the bottom. The two sliding rods 1124 have a notch on the side that is close to each other. The notch is used to form a sliding groove 113. The structure is simple and stable.

[0092] Four positioning blocks 114 are provided inside the slide groove 113. The four positioning blocks 114 are located at the four corners of opposite sides of the heated bed assembly 12. The height of the positioning block 114 near the operation opening 111 is less than the depth of 113. In this embodiment, a triangular locking block is provided on one side of the positioning block 114, and a locking hole 1212 for engaging with the locking block is provided on the side of the heated bed assembly 12.

[0093] Please refer to Figure 14 In this embodiment, the width of the heated bed assembly 12 is smaller than the width of the operating opening 111, so that the heated bed assembly 12 extends beyond the operating opening 111. The heated bed assembly includes a main body plate 121, a heating plate 122, an aluminum plate 123, and a printing plate 124 arranged sequentially from bottom to top. The printing plate 124 may be a polyetherimide plate.

[0094] In this embodiment, the four sides of the main body plate 121 are bent to form frame side plates 1211. The frame side plates 1211 on the four sides are spaced apart by a set distance. The card holes 1212 are provided on the frame side plates 1211, so that the frame side plates 1211 can be elastically deformed, which facilitates the card holes 1212 and the card blocks on the positioning block 114 to engage or disengage.

[0095] In this embodiment, a push-pull handle 125 is provided on the side of the main body plate 121 near the operation opening. This facilitates the removal or insertion of the heated bed assembly 12 from the outer casing 11, improving the convenience of product handling, disassembly, and maintenance.

[0096] The working principle of this invention is as follows: When assembling the 3D printer, since the lifting frame 142 and the lifting blocks 1411 are detachably connected, and the first XY drive assembly 144, the second XY drive assembly 145, the transverse beam 143, and the print head 15 are all integrated on the lifting frame 142, the above components can be assembled into an independent motion mechanism module externally and debugged. Then, the assembled motion mechanism module is assembled onto the four lifting blocks 1411 inside the outer shell 11, which can then be conveniently loaded onto the lifting drive assembly 141. When maintenance or disassembly is required, the entire motion mechanism module can be removed as a whole, eliminating the need for piece-by-piece disassembly and assembly within the confined space inside the outer shell 11, thereby improving disassembly and maintenance efficiency.

[0097] When assembling the motion mechanism, the moving seat 1472 can be slid relative to the fixed block 1471 by rotating the adjusting screw 1474, thereby adjusting the position of the tension pulley 1473, so that the first belt 1442 and the second belt 1452 are kept in a taut state, effectively avoiding transmission errors caused by belt slack and ensuring the motion accuracy of the print head 15.

[0098] During the printing process, the heated bed assembly 12 is stably positioned in the printing position through the cooperation of the positioning pin 126 and the positioning hole 115, as well as through the cooperation of the positioning block 114 and the card hole 1212.

[0099] In addition, based on the temperature detection of the printing chamber by the first chamber temperature sensor and the second chamber temperature sensor 1A, the controller can control the air inlet drive assembly 163 to drive the air inlet plate 162 to open and close the air inlet 161, thereby adjusting the air inlet state. The air outlet drive assembly 173 drives the air outlet module 172 to move, so as to control the exhaust port 1722 to be exposed outside the air outlet mounting port 171, thereby adjusting the air outlet effect and achieving precise control of the temperature inside the printing chamber.

[0100] Hot air blowers 18 are symmetrically arranged on both sides of the heated bed assembly 12. The hot air blowers 18 on both sides are tilted and blow air towards the upper area of ​​the heated bed assembly 12 to achieve uniform circulation of hot air and high thermal efficiency.

[0101] When the printed product needs to be removed after printing is complete, the end of the heated bed assembly 12 near the operation opening 111 is lifted by pushing and pulling the handle 125. When one end of the heated bed assembly 12 disengages from the slide groove 113 to the set position, the positioning pin 126 disengages from the positioning hole 115, thereby allowing the heated bed assembly 12 to be pulled out. After printing is complete, the product can be easily removed without going deep into the outer casing 11, improving ease of use.

[0102] This preferred embodiment of the 3D printer, designed for easy disassembly and maintenance, utilizes a detachable connection between the lifting frame and the lifting block. This allows for pre-assembly of the motion mechanism and printhead externally before overall loading, facilitating convenient disassembly and maintenance and increasing assembly efficiency. Furthermore, the lifting drive assembly independently controls the lifting, while the lifting sensors and joint bearings work together to achieve automatic leveling, resulting in high assembly tolerance. The hot air fan's position and orientation are precisely controlled to ensure uniform hot air circulation and high thermal efficiency. The push-pull design of the electrical control box and the pull-out design of the heated bed assembly further enhance the ease of connecting and disconnecting electrical wires, as well as the convenience of product removal.

[0103] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A 3D printer that is easy to disassemble and maintain, characterized in that, include: The housing includes a heated bed assembly, a motion mechanism, and a print head disposed within the housing. The print head is connected to the motion mechanism, which is used to move the print head to a different position. The print head is located above the heated bed assembly. The motion mechanism includes: A lifting drive assembly is disposed on the inner peripheral side of the housing, and the lifting drive assembly includes a lifting block; The lifting frame is detachably connected to the lifting block: A transverse beam is slidably mounted on the lifting frame along the Y direction, and the printing nozzle is slidably mounted on the transverse beam along the X direction; A first XY drive assembly is mounted on the lifting frame, and the output end of the first XY drive assembly is connected to the print head; and A second XY drive assembly is mounted on the lifting frame. The output end of the second XY drive assembly is connected to the print head. The second XY drive assembly, together with the first XY drive assembly, drives the print head to slide along the X direction and drives the transverse beam to slide along the Y direction.

2. The 3D printer that is easy to disassemble and maintain according to claim 1, characterized in that, The 3D printer that is easy to disassemble and maintain includes four lifting drive components, which are respectively located at the four corners of the outer casing. The top of the lifting block is provided with a connecting column, and the lifting frame is provided with a connecting hole for connecting with the connecting column.

3. The 3D printer that is easy to disassemble and maintain according to claim 1 or 2, characterized in that, The lifting drive assembly also includes a lifting drive motor, a fixed base, a lead screw, a lifting sensor, and a lifting sensing plate; The motor is fixedly connected to the outer casing via the fixed base. The lead screw is connected to the output end of the motor. The lifting block is driven by the lead screw and is slidably connected to the inner wall of the outer casing. The lifting sensing plate is fixedly connected to the bottom of the lifting block. The lifting sensor is fixedly connected to one side of the fixed base. The lifting sensor is used to sense the lifting position of the lifting sensing plate. One end of the connecting column is movably connected to the connecting hole via a spherical bearing.

4. The 3D printer that is easy to disassemble and maintain according to claim 1, characterized in that, The first XY drive assembly includes a first drive motor, a first belt, and a plurality of first pulleys. The first drive motor is fixedly connected to the lifting frame, and the plurality of first pulleys are disposed on the lifting frame. The output shaft of the first drive motor is drivenly connected to one of the first pulleys, and the first belt is wound between the plurality of first pulleys to form a first annular loop. The second XY drive assembly includes a second drive motor, a second belt, and a plurality of second pulleys. The second drive motor is fixedly connected to the lifting frame, and the plurality of second pulleys are disposed on the lifting frame. The output shaft of the second drive motor is drivenly connected to one of the second pulleys, and the second belt is wound between the plurality of second pulleys to form a second annular loop. The first annular loop includes a first quadrilateral segment and a first extension segment. The first quadrilateral segment is wound around four first pulleys, and the first extension segment is wound around one of the first pulleys other than the first quadrilateral segment. The second annular loop includes a second quadrilateral segment and a second extension segment. The second quadrilateral segment is wound around four second pulleys, and the second extension segment is wound around one of the second pulleys other than the second quadrilateral segment. The first extension segment and the second extension segment are respectively located at both ends of the transverse beam. One side of the first quadrilateral is the first nozzle connection segment, which is fixedly connected to the printing nozzle. The first nozzle connection segment is located between the first extension segment and the second extension segment. One side of the second quadrilateral is the second nozzle connection segment, which is fixedly connected to the printing nozzle. The second nozzle connection segment is located between the first extension segment and the second extension segment. When the first drive motor and the second drive motor rotate in the same direction, the resultant force generated by the first printhead connecting section and the second printhead connecting section on the printhead drives the printhead to move along the X-axis. When the first drive motor and the second drive motor rotate in opposite directions, the combined force generated by the first printhead connecting section and the second printhead connecting section on the printhead drives the transverse beam to move along the Y-axis.

5. The 3D printer that is easy to disassemble and maintain according to claim 4, characterized in that, Both the first XY drive assembly and the second XY drive assembly include a tensioning structure, which includes a fixed block, a movable seat, a tensioning spring, a tensioning pulley, and an adjusting screw. The fixed block is fixedly mounted on the lifting frame. The movable seat is provided with a groove. The fixed block is located in the groove, and the movable seat and the fixed block form a sliding fit. The adjusting screw passes through one side of the movable seat and is threadedly connected to the fixed block. The tension pulley is located on the other side of the movable seat. The tension spring is sleeved on the adjusting screw and is located between the fixed block and the inner wall of the groove. The tension spring is used to drive the movable seat to move away from the tension pulley. The first belt forms a V-shaped structure around the tension pulley and the two first pulleys, and the sliding trajectory of the movable seat is parallel to the side segment of one side of the first quadrilateral segment; The second belt forms a V-shaped structure around the tension pulley and the two second pulleys, and the sliding trajectory of the movable seat is parallel to the side segment of one side of the second quadrilateral segment.

6. The 3D printer that is easy to disassemble and maintain according to claim 5, characterized in that, The lifting frame includes three main rods, two intermediate connecting frames, and two end connecting frames; The three main rods are connected in a U-shaped structure, wherein the two ends of the main rod in the middle are respectively connected to the main rods on both sides through a middle connecting frame, and the free ends of the main rods on both sides are respectively provided with an end connecting frame; One of the intermediate connecting frames is provided with the first drive motor and a set of the tensioning structures, and the other intermediate connecting frame is provided with the second drive motor and a set of the tensioning structures; Both the intermediate connecting frame and the end connecting frame are provided with connection holes for connecting to the lifting block; The transverse beam is slidably connected to the two main rods via a sliding connecting frame. The first pulley and the second pulley are provided on the intermediate connecting frame, the end connecting frame, and the sliding connecting frame.

7. The 3D printer that is easy to disassemble and maintain according to claim 1, characterized in that, The outer bottom of the outer casing is connected to two connectors, and a connecting groove is formed between the two connectors. The 3D printer, which is easy to disassemble and maintain, also includes an electrical control box for setting electrical control devices. The electrical control box is slidably connected to the connecting groove.

8. The 3D printer that is easy to disassemble and maintain according to claim 1, characterized in that, The 3D printer, which is easy to disassemble and maintain, also includes hot air blowers. The hot air blowers are symmetrically arranged on both sides of the heated bed assembly, and the hot air blowers on both sides are tilted towards the upper area of ​​the heated bed assembly.

9. The 3D printer that is easy to disassemble and maintain according to claim 1, characterized in that, The outer casing is provided with an air inlet structure and an air outlet structure; The air intake structure includes an air inlet, an air intake plate for closing the air inlet, and an air intake drive assembly. The air inlet is disposed on the outer shell, the air intake plate is rotatably connected to the outer shell, and the air intake plate is drively connected to the output end of the air intake drive assembly. The air outlet structure includes an air outlet mounting port, an air outlet module, and an air outlet drive assembly. The air outlet mounting port is disposed on the outer casing. The air outlet module is movably disposed at the air outlet mounting port. An exhaust fan is disposed inside the air outlet module. An air intake port and an exhaust port are disposed on both sides of the air outlet module. The air outlet module is connected to the output end of the air outlet drive assembly. The air outlet drive assembly is used to drive the air outlet module to move, so as to control the exhaust port to be exposed outside the air outlet mounting port.

10. The 3D printer with easy disassembly and maintenance according to claim 1, characterized in that, An operation opening is provided on one side of the outer shell. The 3D printer, which is easy to disassemble and maintain, also includes a door. The door is used to close the operation opening. The operation opening extends on the vertical side and top surface of the outer shell. The operation opening at least covers part of the top surface of the outer shell. The door has an L-shaped structure, and one end of the door is rotatably connected to the top of the outer shell. The inner bottom surface of the outer casing is provided with a sliding groove, the sliding groove extending in the direction of the operating opening. The heated bed assembly is slidably fitted in the sliding groove, and a positioning hole is provided in the sliding groove. The heated bed assembly is provided with a positioning pin for positioning and engaging with the positioning hole. At least one end of the heated bed assembly near the operating opening is detachably slidably fitted in the sliding groove. When one end of the heated bed assembly disengages from the sliding groove to a set degree, the positioning pin disengages from the positioning hole. At least two positioning blocks for positioning the heated bed assembly are provided in the sliding groove, and the height of the positioning block near the operating opening is less than the depth of the sliding groove.

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