Rotary locking and aligning detachable forming cylinder and 3D printer

Abstract

The utility model relates to the technical field of metal 3D printing, in particular to a rotary locking and aligning detachable forming cylinder and a 3D printer, the rotary locking and aligning detachable forming cylinder comprises a bottom plate and a forming cylinder body, the forming cylinder body comprises a cylinder body piston assembly and a printing base plate, the bottom plate is arranged at the bottom of a cylinder body, and the printing base plate is arranged in the cylinder body through the piston assembly; the piston assembly is matched with the cylinder body, the rotary locking and aligning detachable forming cylinder further comprises a gear motor assembly, a mounting assembly, a first lifting part and a second lifting part, and the first lifting part is used for driving the gear motor assembly to ascend and descend; a connecting bolt is arranged on the gear motor assembly, and the gear motor assembly is used for controlling the connecting bolt to rotate; a connecting nut is arranged on the mounting assembly, and the connecting bolt can ascend along with the gear motor assembly to be in threaded connection with the connecting nut; and the bottom plate is detachably connected with the cylinder body. The forming cylinder has the effects of being convenient to machine, manufacture, transport and replace, and can be locked and aligned through rotation.

Description

Technical Field

[0001] This application relates to the technical field of metal 3D printing, and in particular to a rotary locking alignment detachable molding cylinder and a 3D printer. Background Technology

[0002] A 3D metal printer is a scientific instrument used in basic sciences of physics, engineering and technology, and mechanical engineering. It uses laser melting technology to melt metal powder to form functional solid parts. It can be used to print high-throughput metal materials. It is a fully digital rapid prototyping manufacturing process that directly produces high-density metal parts based on the interface data of each layer in 3D CAD. The thickness of the molten metal layer ranges from 20 micrometers to 100 micrometers, enabling rapid metal prototyping.

[0003] When a 3D printer manufactures parts, it first needs to lay powder, which involves placing metal powder into the forming cylinder of the forming chamber. A laser melting device is placed on the forming chamber and aims at the metal powder in the forming cylinder to melt it with a laser, after which the metal solidifies and forms a shape. In related technologies, the forming cylinder includes a cylinder body, a base plate, a piston assembly, a printing substrate, and an electric cylinder connected as one unit. The printing substrate and the piston assembly are both located inside the cylinder body, with the printing substrate placed on the piston assembly. The base plate is fixedly connected to the bottom of the cylinder body, and the electric cylinder is fixedly mounted on the bottom surface of the base plate. The piston rod of the electric cylinder passes through the base plate and is fixedly connected to the bottom of the piston assembly. However, since the cylinder body, base plate, printing substrate, piston assembly, and electric cylinder are connected as one unit, the forming cylinder needs to be manufactured as a whole and transported as a whole after manufacturing, which causes inconvenience in processing and transportation. Moreover, after the metal is printed in the cylinder, the printed substrate needs to be lifted up, the powder needs to be removed, and then it needs to be moved out from the front door, which is not conducive to taking out the parts printed in the cylinder separately. The whole process takes up a lot of printing time. Furthermore, if any of the cylinder body, piston assembly, printing substrate, or electric cylinder is damaged or needs to be replaced, it is not convenient to replace them, resulting in high costs. Summary of the Invention

[0004] To facilitate the processing, manufacturing, transportation, and replacement of molding cylinders, this application provides a rotary locking alignment detachable molding cylinder and a 3D printer.

[0005] Firstly, the rotary locking alignment detachable molding cylinder provided in this application adopts the following technical solution:

[0006] A rotary locking alignment detachable molding cylinder includes a base plate and a molding cylinder body. The molding cylinder body includes a cylinder body, a piston assembly, and a printing substrate. The base plate is disposed at the bottom of the cylinder body, and the printing substrate is disposed in the cylinder body through the piston assembly. A limiting member is disposed in the cylinder body, and the limiting member is supported below the piston assembly to limit the downward movement of the piston assembly. The piston assembly is adapted to the cylinder body and further includes a geared motor assembly, a mounting assembly, a first lifting member, and a second lifting member.

[0007] The first lifting component is fixedly installed on the base plate and connected to the geared motor assembly, and is used to drive the geared motor assembly to lift; the geared motor assembly is provided with connecting bolts, and the geared motor assembly is used to control the rotation of the connecting bolts;

[0008] The mounting assembly is fixedly connected to the piston assembly. The mounting assembly includes a connecting nut. The connecting bolt can rise with the geared motor assembly to be threadedly connected to the connecting nut, so as to align and rotate the connecting bolt and the connecting nut for locking.

[0009] The base plate is detachably connected to the cylinder body.

[0010] By adopting the above technical solution, when assembling the molding cylinder body, the cylinder body is connected to the base plate, and the printing substrate is placed in the cylinder body through the piston assembly. The first lifting component and the reduction motor assembly are activated to drive the connecting bolt to align and rotate upward into the connecting nut. Since the side of the piston assembly is adapted to the cylinder body, the rotation of the piston assembly is restricted, and the limiting component at the bottom of the piston assembly restricts the downward movement of the piston assembly. As the connecting bolt rotates, the connecting nut moves downward, realizing the threaded connection with the connecting bolt, thereby realizing the connection between the piston assembly and the printing substrate and the first lifting component. After the piston assembly and the first lifting component are connected in place, the reduction motor assembly stops driving the connecting bolt to rotate. When disassembling the molding cylinder body, the above operations are performed in reverse. Compared with an integrated molding cylinder, the base plate, cylinder body, piston assembly, and electric cylinder of the molding cylinder of this application can be disassembled and assembled. The piston assembly can be transported out together with the cylinder body, which is convenient for separate processing and manufacturing, and also facilitates the transportation and replacement of the printing substrate on the cylinder body and piston assembly.

[0011] When the forming cylinder is in use, the printing substrate rises to a position near the top of the cylinder, and then a layer of metal powder is laid in the cylinder. After each layer is laser-melted and printed, the printing substrate descends a specified distance via the first lifting component, and then the next layer of metal powder is laid, until the specified number of metal powder layers are printed, resulting in a solid functional component. After the metal is printed in the cylinder, the cylinder only needs to be removed and taken out separately before the part can be retrieved. Another cylinder can be installed on the original printer, which will not occupy a lot of time on the printer.

[0012] Optionally, the mounting assembly further includes a mounting cylinder, a mounting ring, and a compression spring. The connecting nut is disposed inside the mounting cylinder, the inner hole of the mounting cylinder is a polygonal hole, and the mounting ring is fixedly connected to the bottom surface of the mounting cylinder.

[0013] The top of the connecting nut is provided with a polygonal limiting plate, the compression spring is placed on the top of the mounting ring, the top of the compression spring abuts against the bottom surface of the polygonal limiting plate, the side wall of the mounting cylinder limits the polygonal limiting plate in the horizontal direction, and the top of the polygonal limiting plate abuts against the top of the mounting cylinder.

[0014] The compression spring is used in conjunction with the connecting bolt to control the tightening force of the connecting nut.

[0015] By adopting the above technical solution, the connection between the printing substrate and the first lifting component includes the following steps:

[0016] S1. Separation to Contact: In the initial state, the connecting bolt is located below the connecting nut, and the connecting bolt and the connecting nut are in a separated state. The polygonal limiting plate is pressed against the top wall inside the mounting cylinder under the action of the compression spring.

[0017] First, start the second lifting machine to raise the output shaft of the second lifting component. When the output shaft of the second lifting component rises, it carries the geared motor assembly, the first lifting component and the base plate to rise synchronously until the base plate and the cylinder are connected. Then, the geared motor assembly, the first lifting component, the base plate and the cylinder are lifted upward as a whole until the top of the cylinder abuts against the bottom surface of the integrated base plate. The integrated base plate is a piece of plate that is used in conjunction with the rotary locking and detachable molding cylinder of this application.

[0018] Then, the first lifting component and the geared motor assembly are activated. The first lifting component drives the geared motor assembly to rise, and the geared motor assembly drives the connecting bolt to rotate, thereby driving the connecting bolt to rise and rotate at the same time. The connecting bolt passes through the mounting ring and extends into the connecting nut to contact the connecting nut, thus achieving alignment.

[0019] S2. Contact between the mounting ring and the geared motor assembly: After reliable contact between the connecting bolt and the connecting nut, the first lifting component continues to rise, and the geared motor assembly continues to drive the connecting bolt to rotate. The connecting bolt is screwed into the connecting nut a certain distance until the bottom surface of the mounting ring abuts against the top surface of the geared motor assembly, thereby achieving an upward constraint force.

[0020] S3. The connecting nut descends: After the bottom surface of the mounting ring abuts against the top surface of the geared motor assembly, the first lifting component stops rising. The geared motor assembly drives the connecting bolt to continue rotating. Under the limiting action of the top surface of the geared motor assembly, and under the limiting action of the cylinder and the limiting component on the piston assembly, the piston assembly and the mounting cylinder as a whole cannot move downward. Therefore, as the connecting bolt continues to rotate, after overcoming the elastic force of the compression spring, under the limiting action of the polygonal limiting plate and the polygonal hole, the connecting bolt moves downward in the mounting cylinder.

[0021] S4. Locking: The connecting bolt moves downward a fixed distance inside the mounting sleeve until the compression spring is fully compressed, and the connecting bolt and connecting nut are fully locked.

[0022] When the compression spring is compressed a specified distance or reaches a specified compression force, the rotating motor is turned off. At this time, the compression spring is equivalent to a solid columnar component. During the powder spreading and descent process of the subsequent piston assembly and printing substrate, the required compression force has been reached, and the bottom surface of the mounting cylinder and the top surface of the mounting cover are tightly abutting. Therefore, the compression spring will not rebound, and the connecting nut will not sway up and down due to the deformation of the compression spring. The compression force of the compression spring achieves a downward tension force, improving the stability of the locking of the connecting bolt and the connecting nut, thereby improving the stability and reliability of the first lifting component driving the piston assembly to rise and fall.

[0023] Optionally, the lower part of the inner hole of the mounting ring is gradually widened from top to bottom, and the lower part of the inner hole of the connecting nut is also gradually widened from top to bottom, so as to guide the connecting bolt to align and enter the connecting nut.

[0024] By adopting the above technical solution, since the connecting bolt and connecting nut are located inside the cylinder body and in a blind spot, the connection of the connecting bolt and connecting nut is automated. The lower part of the inner hole of the mounting ring is gradually widened from top to bottom, and the lower part of the inner hole of the connecting nut is also gradually widened from top to bottom, which can play a good guiding role, making it easier for the connecting bolt and connecting nut to align. This facilitates the connecting bolt to pass through the mounting ring and enter the connecting nut, helps to correct misalignment, and improves reliability.

[0025] Optionally, a second lifting component is also included. The output shaft of the second lifting component is fixedly connected to the base plate. A guide slope is provided on the inner side of the top surface of the base plate. After the guide slope is raised by the second lifting component, it is located on the inner side of the cylinder body, so that the cylinder body can be guided and aligned.

[0026] By adopting the above technical solution, before connecting the top surface of the base plate and the bottom surface of the cylinder, the second lifting component is activated first, causing its output shaft to rise. As the output shaft rises, it simultaneously lifts the geared motor assembly, the first lifting component, and the base plate. The guide slope of the base plate contacts the inner wall of the cylinder to complete the guidance, and the top plane of the base plate contacts the bottom plane of the cylinder to complete the connection between the base plate and the cylinder. This provides good guidance and facilitates alignment between the base plate and the cylinder. Simultaneously, the base plate, geared motor assembly, and the first lifting component rise a significant distance, bringing the connecting bolts closer to the connecting nut. Then, the connecting bolts are raised again via the first lifting component. At this point, the distance the first lifting component needs to rise is not too large, making the operation more convenient and reliable.

[0027] Optionally, the geared motor assembly includes a mounting cover and a drive component. The drive component is disposed on the mounting cover and is used to drive the connecting bolt to rotate. As the first lifting member rises, the top of the mounting cover contacts the bottom plane of the mounting ring. During the subsequent printing process, the piston assembly rises within the cylinder.

[0028] Optionally, there is a space for movement between the outer periphery of the polygonal limiting plate and the polygonal hole;

[0029] The top of the polygonal limiting plate is fixedly provided with an arc-shaped protrusion, and the top wall inside the mounting cylinder is provided with an arc-shaped groove for the arc-shaped protrusion to move in. The arc of the arc-shaped groove is greater than the arc of the arc-shaped protrusion.

[0030] By adopting the above technical solution, the compression spring can use its own elastic force to firmly press the polygonal limiting plate against the top wall inside the mounting cylinder, while simultaneously pressing the arc-shaped protrusion against the arc-shaped groove. When the connecting bolt is inserted into the connecting nut for rotation, the arc-shaped protrusion can move within the arc-shaped groove. At the same time, there is a space for movement between the outer periphery of the polygonal limiting plate and the polygonal hole, and the compression spring can also tilt or twist slightly to either side. This prevents rigid impact and jamming when the connecting bolt rotates to insert into the connecting nut, thus avoiding damage to the threads. Furthermore, it eliminates the need for perfect alignment and fit between the connecting bolt and the connecting nut, helping to improve accuracy and reliability.

[0031] Optionally, the driving component includes a rotary motor, a worm gear, and a worm. The rotary motor is fixedly mounted on the side of the mounting cover, and the rotating shaft of the rotary motor passes through the mounting cover and extends into the interior of the mounting cover. The worm gear and the worm are both disposed inside the mounting cover. The worm gear is fixedly connected to the rotating shaft of the rotary motor, and the connecting bolt is fixedly connected to the worm gear and coaxially arranged with the worm gear. The worm gear meshes with the worm.

[0032] By adopting the above technical solution, when the connecting bolt needs to be rotated, the rotating motor is started, driving the worm and worm wheel to rotate, thereby driving the connecting bolt to rotate. The worm pitch and worm wheel tooth pitch can be set according to the actual situation to achieve a specified reduction ratio and realize the speed reduction effect.

[0033] Secondly, the 3D printer provided in this application adopts the following technical solution:

[0034] A 3D printer includes the aforementioned rotary locking alignment detachable molding cylinder.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. Compared to an integrated molding cylinder, the molding cylinder of this application has a base plate, cylinder body, piston assembly and printing substrate that can be disassembled and assembled. The piston assembly can be transported out together with the cylinder body, which is convenient for separate processing and manufacturing, as well as convenient for transporting and replacing the printing substrate on the cylinder body and piston assembly. After the metal is printed in the cylinder body, it is only necessary to remove the cylinder body and move it out separately before the part is picked up. Another cylinder body can be installed on the original printer, which will not occupy a lot of time on the printer.

[0037] 2. Once fully compressed, the compression spring acts as a solid cylindrical component. During the subsequent toner-spreading and descent of the printing substrate, the compression spring cannot continue to extend or retract. Therefore, the connecting nut will not wobble due to the deformation of the compression spring, improving the stability of the locking of the connecting bolt and the connecting nut. This, in turn, improves the stability and reliability of the first lifting component driving the printing substrate downwards. Furthermore, because the spring force of the compression spring will firmly press the polygonal limiting disc against the top wall inside the mounting cylinder, the connecting bolt and connecting nut can also be stably locked during the rising of the printing substrate, further improving the stability and reliability of the first lifting component driving the printing substrate upwards.

[0038] 3. When the connecting bolt is rotated to the point of insertion into the connecting nut, there will be no rigid impact that could cause jamming or damage to the thread. This can improve accuracy and reliability. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of a rotary locking alignment detachable molding cylinder according to an embodiment of this application.

[0040] Figure 2 This is a schematic diagram illustrating the internal structure of the cylinder block in an embodiment of this application.

[0041] Figure 3 This is a schematic diagram showing the structure of the mounting cylinder after the printing substrate is hidden.

[0042] Figure 4This is a schematic diagram used to show the internal structure of the mounting cover and mounting cylinder.

[0043] Figure 5 This is a schematic diagram illustrating the structure of the pin in an embodiment of this application.

[0044] Figure 6 yes Figure 4 Enlarged view of point A in the middle.

[0045] Figure 7 This is a structural diagram used to illustrate the connection between the nut and the compression spring.

[0046] Figure 8 This is a structural diagram showing the worm gear after the top surface of the mounting cover is hidden.

[0047] Explanation of reference numerals in the attached drawings: 1. Base plate; 11. Guide slope; 2. Cylinder body; 21. Integrated base plate; 3. Printed base plate; 31. Piston assembly; 32. Pin; 33. Mounting plate; 34. Mounting frame; 35. Sealing ring; 4. Mounting cover; 41. Gear motor assembly; 411. Rotary motor; 412. Worm gear; 413. Worm; 42. Connecting bolt; 43. Polygonal limiting plate; 44. Arc-shaped protrusion; 5. Mounting cylinder; 51. Polygonal hole; 52. Mounting ring; 53. Compression spring; 54. Extension ring; 55. Arc-shaped groove; 6. Electric cylinder; 7. Screw jack; 8. Connecting nut; 9. Top cover. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0049] This application discloses a rotary locking alignment detachable molding cylinder and a 3D printer.

[0050] In the first aspect, this application discloses a rotary locking alignment detachable molding cylinder:

[0051] Reference Figure 1-5The rotating, locking, and detachable molding cylinder includes a base plate 1, a first lifting component and a second lifting component of the molding cylinder body. The molding cylinder body includes a cylinder body 2, a piston assembly 31, and a printing substrate 3. The base plate 1 is located at the bottom of the cylinder body 2 and is detachably connected by bolts. The printing substrate 3 is disposed inside the cylinder body 2 via the piston assembly 31, which is adapted to the cylinder body 2. The piston assembly 31 includes a mounting plate 33, a mounting frame 34, and a sealing ring 35. The mounting plate 33 is fixedly connected to the top surface of the mounting frame 34, and the sealing ring 35 is fitted onto the mounting frame 34. A limiting component is fixedly connected to the inner wall of the cylinder 2 near the bottom. In this embodiment, the limiting component is a pin 32 with a ring. Alternatively, a support rod can be used instead of the pin 32 as the limiting component. The piston assembly 31 is placed entirely on the pin 32. When the piston assembly 31 is placed on the pin 32, the bottom surface of the mounting frame 34 abuts against the top surface of the pin 32, preventing the piston assembly 31 from falling down. The printing substrate 3 is fixed to the top surface of the mounting plate 33 with screws. In this application, the piston assembly 31 cooperates with the pin 32 to play a connecting and limiting role. It can have the above-described structure or other structures, which will not be elaborated further in this application.

[0052] The rotary locking alignment detachable forming cylinder also includes a geared motor assembly 41 and a mounting assembly. The mounting assembly is fixedly connected to the piston assembly 31 and includes a mounting cylinder 5, a connecting nut 8, a mounting ring 52, and a compression spring 53. The connecting nut 8 is disposed inside the mounting cylinder 5. The first lifting component is an electric cylinder 6, the second lifting component is a screw jack 7, and the top of the mounting cover 4 is a top cover 9. The electric cylinder 6 is fixedly mounted on the base plate 1, and the piston rod of the electric cylinder 6 passes through the base plate 1 and is fixedly connected to the mounting cover 4, used to drive the mounting cover 4 to rise and fall. A connecting bolt 42 is provided on the geared motor assembly 41, and the geared motor assembly 41 is used to control the rotation of the connecting bolt 42. The mounting cylinder 5 passes through the mounting frame 34 and is fixedly connected to the mounting plate 33. A connecting nut 8 is provided on the mounting cylinder 5, and the connecting bolt 42 can rise with the mounting cover 4 to be threadedly connected to the connecting nut 8.

[0053] Reference Figure 6-8 The geared motor assembly 41 includes a mounting cover 4 and a drive component. The drive component is mounted on the mounting cover 4 and is used to drive the connecting bolt 42 to rotate. As the first lifting member rises, the top of the mounting cover 4 contacts the bottom plane of the mounting ring 52. During subsequent printing and rising, the piston assembly 31 rises within the cylinder 2. The drive component includes a rotary motor 411, a worm gear 412, and a worm 413. The rotary motor 411 is fixedly mounted on the side of the mounting cover 4. The shaft of the rotary motor 411 passes through the mounting cover 4 and extends into the interior of the mounting cover 4. The worm gear 412 and the worm 413 are both located inside the mounting cover 4.

[0054] The worm gear 412 is fixedly connected to the shaft of the rotary motor 411. The connecting bolt 42 is fixedly connected to the worm gear 412 and is coaxially arranged with the worm gear 412. The worm gear 412 meshes with the worm 413. When the connecting bolt 42 needs to rotate, the rotary motor 411 is started, driving the worm 413 and the worm gear 412 to rotate, thereby driving the connecting bolt 42 to rotate. The pitch of the worm 413 and the tooth pitch of the worm gear 412 can be set according to the actual situation to achieve a specified reduction ratio and realize the reduction effect. The rotary motor 411 is fixedly installed on the side of the mounting cover 4. The shaft of the rotary motor 411 passes through the mounting cover 4 and extends into the interior of the mounting cover 4. The worm gear 412 and the worm 413 are both set inside the mounting cover 4. The mounting cover 4 prevents the worm gear 412 and the worm 413 from being exposed, providing protection; at the same time, it makes the overall geared motor assembly 41 more neat and beautiful, with a simple and compact structure.

[0055] When assembling the molding cylinder body, the cylinder body 2 is connected to the base plate 1, and the printing substrate 3 is placed inside the cylinder body 2. The electric cylinder 6 and the geared motor assembly 41 are started, driving the connecting bolt 42 to align and rotate upward into the connecting nut 8. Since the side of the piston assembly 31 is adapted to the cylinder body 2, the rotation of the piston assembly 31 is restricted, and the limiting part at the bottom of the piston assembly 31 restricts the piston assembly 31 from moving downward. As the connecting bolt 42 rotates, the connecting nut 8 moves downward, realizing the threaded connection with the connecting bolt 42, thereby realizing the connection between the piston assembly 31 and the electric cylinder 6, and further realizing the connection between the printing substrate 3 and the electric cylinder 6. After the printing substrate 3 and the electric cylinder 6 are connected in place, the geared motor assembly 41 stops driving the connecting bolt 42 to rotate. When disassembling the molding cylinder body, the above operations are performed in reverse. Compared to an integrated molding cylinder, the molding cylinder of this application has a base plate 1, cylinder body 2, piston assembly 31 and printing substrate 3 that can be disassembled and assembled. The piston assembly 31 can be transported out together with the cylinder body 2, which facilitates separate processing and manufacturing, and facilitates the transportation and replacement of the printing substrate 3 on the cylinder body 2 and piston assembly 31.

[0056] When the forming cylinder body is in use, the printing substrate 3 rises to a position close to the top of the cylinder 2, and then a layer of metal powder is laid in the cylinder 2. After each layer is laser-melted and printed, the printing substrate 3 is lowered a specified distance by the electric cylinder 6, and then the next layer of metal powder is laid, until the specified number of metal powder layers are printed, resulting in a solid functional component. After the metal is printed in the cylinder 2, it is only necessary to remove the cylinder 2 and move it out separately before the part is retrieved. Another cylinder 2 can be installed on the original printer, which will not occupy a lot of time on the printer.

[0057] Reference Figure 6-7The inner hole of the mounting cylinder 5 is a polygonal hole 51, and the inner diameter of the mounting ring 52 is smaller than the inner diameter of the mounting cylinder 5. The connecting nut 8 is cylindrical, and a polygonal limiting plate 43 is fixedly connected to and coaxially disposed at the top of the connecting nut 8. The polygonal limiting plate 43 is flexibly disposed within the polygonal hole 51, and the connecting nut 8 is flexibly disposed within the mounting cylinder 5 and the mounting ring 52. In this embodiment, the polygonal limiting plate 43 is a hexagonal limiting plate, and the polygonal hole 51 is a hexagonal hole. The compression spring 53 is placed on the top of the mounting ring 52, and the top of the compression spring 53 abuts against the bottom surface of the polygonal limiting plate 43. The side wall of the mounting cylinder 5 horizontally limits the polygonal limiting plate 43, and the top of the polygonal limiting plate 43 abuts against the top of the inner wall of the mounting cylinder 5. The compression spring 53 is used to cooperate with the connecting bolt 42 to control the locking force of the connecting nut 8.

[0058] Reference Figure 1-7 When connecting the printed circuit board 3 on the piston assembly 31 and the electric cylinder 6, the following steps are included:

[0059] S1. Separation to Contact: In the initial state, the connecting bolt 42 is located below the connecting nut 8, and the connecting bolt 42 and the connecting nut 8 are in a separated state. The polygonal limiting plate 43 is pressed against the top wall inside the mounting cylinder 5 under the action of the compression spring 53.

[0060] First, start the screw jack 7 to raise its output shaft. As the output shaft of the screw jack 7 rises, it carries the geared motor assembly 41, the electric cylinder 6, and the base plate 1 to rise synchronously until the base plate 1 and the cylinder body 2 are connected. Then, the geared motor assembly 41, the electric cylinder 6, the base plate 1, and the cylinder body 2 are lifted upward as a whole until the top of the cylinder body 2 abuts against the bottom surface of the integrated base plate 21. The integrated base plate 21 is a piece of material used in conjunction with the rotary locking alignment detachable molding cylinder of this application.

[0061] Then, start the electric cylinder 6 and the geared motor assembly 41. The electric cylinder 6 drives the geared motor assembly 41 to rise, and the geared motor assembly 41 drives the connecting bolt 42 to rotate. Thus, the connecting bolt 42 rises and rotates at the same time. The connecting bolt 42 passes through the mounting ring 52 and extends into the connecting nut 8 to contact the connecting nut 8. The connecting nut 8 contacts the connecting bolt 42 to achieve alignment.

[0062] S2. The mounting ring 52 contacts the geared motor assembly 41: After the connecting bolt 42 and the connecting nut 8 make reliable contact, the first lifting component continues to rise, and the geared motor assembly 41 continues to drive the connecting bolt 42 to rotate. The connecting bolt 42 is screwed into the connecting nut 8 a certain distance until the bottom surface of the mounting ring 52 abuts against the top surface of the geared motor assembly 41, thereby achieving an upward constraint force.

[0063] S3. The connecting nut 8 descends: After the bottom surface of the mounting ring 52 abuts against the top surface of the geared motor assembly 41, the first lifting component stops rising. The geared motor assembly 41 drives the connecting bolt 42 to continue rotating. Under the limiting action of the top surface of the geared motor assembly 41, and under the limiting action of the cylinder 2 and the limiting component on the piston assembly 31, the piston assembly 31 and the mounting cylinder 5 as a whole cannot move downward. Therefore, as the connecting bolt 42 continues to rotate, after overcoming the elastic force of the compression spring 53, under the limiting action of the polygonal limiting plate 43 and the polygonal hole 51, the connecting bolt 42 moves downward in the mounting cylinder 5.

[0064] S4. Locking: The connecting bolt 42 moves downward a fixed distance inside the mounting sleeve 5 until the compression spring 53 is fully compressed, and the connecting bolt 42 and the connecting nut 8 are fully locked.

[0065] When the compression spring 53 is compressed to a specified distance or reaches a specified compression force, the rotating motor 411 is turned off. At this time, the compression spring 53 is equivalent to a solid columnar component. During the powder spreading and descent process, the subsequent piston assembly 31 and the printing substrate 3 have reached the required compression force, and the bottom surface of the mounting cylinder 5 and the top surface of the mounting cover 4 and the top cover 9 are tightly abutted. Therefore, the compression spring 53 will not rebound, and the connecting nut 8 will not shake up and down due to the deformation of the compression spring 53. The compression force of the compression spring 53 achieves a downward tension force, which improves the stability of the locking of the connecting bolt 42 and the connecting nut 8, thereby improving the stability and reliability of the first lifting component driving the piston assembly 31 to rise and fall.

[0066] Reference Figure 6-7 The lower part of the inner hole of the mounting ring 52 gradually expands from top to bottom, and the lower part of the inner hole of the connecting nut 8 also gradually expands from top to bottom. Since the connecting bolt 42 and the connecting nut 8 are located inside the cylinder body 2, in a blind spot, the connection of the connecting bolt 42 and the connecting nut 8 is automated. The gradual expansion of the lower part of the inner hole of the mounting ring 52 and the connecting nut 8 provides good guidance, facilitating the alignment of the connecting bolt and the connecting nut. This allows the connecting bolt 42 to pass through the mounting ring 52 and enter the connecting nut 8, helping to correct alignment errors and improve reliability.

[0067] Reference Figure 6 An extension ring 54 is fixedly connected to the top surface of the mounting ring 52. The extension ring 54 is coaxially arranged with the mounting ring 52, and the inner diameter of the extension ring 54 is the same as that of the mounting ring 52. The extension ring 54 is sleeved on the bottom end of the connecting nut 8, and the bottom end of the compression spring 53 is sleeved on the extension ring 54. On the one hand, the extension ring 54 facilitates the limiting of the bottom end of the connecting nut 8 and provides a lifting channel for the bottom end of the connecting nut 8; on the other hand, it allows a gap between the compression spring 53 and the connecting nut 8, facilitating the smooth lifting and lowering of the connecting nut 8.

[0068] Reference Figure 6-7 There is a small space for movement between the outer periphery of the polygonal limiting plate 43 and the polygonal hole 51, and there is also a small space for movement between the outer periphery of the connecting nut 8 and the inner hole of the extension ring 54 and the inner hole of the mounting ring 52. An arc-shaped protrusion 44 is fixedly provided on the top of the polygonal limiting plate 43, and an arc-shaped groove 55 is provided on the top wall inside the mounting cylinder 5 for the arc-shaped protrusion 44 to move in. The curvature of the arc-shaped groove 55 is greater than the curvature of the arc-shaped protrusion 44.

[0069] The compression spring 53 can use its own elastic force to firmly press the polygonal limiting plate 43 against the top wall inside the mounting cylinder 5, while simultaneously pressing the arc-shaped protrusion 44 against the arc-shaped groove 55. When the connecting bolt 42 is inserted into the connecting nut 8 and rotates, the arc-shaped protrusion 44 can move in the arc-shaped groove 55. At the same time, there is a space for movement between the outer periphery of the polygonal limiting plate 43 and the polygonal hole 51, and there is also a space for movement between the outer periphery of the connecting nut 8 and the inner hole of the extension ring 54 and the inner hole of the mounting ring 52. Furthermore, the compression spring 53 can also tilt or twist slightly to either side, so that when the connecting bolt 42 rotates to insert into the connecting nut 8, it will not form a rigid impact that causes jamming and damage to the threads. As a result, the connecting bolt 42 and the connecting nut 8 do not need to be perfectly aligned or perfectly fitted, which helps to improve accuracy and reliability.

[0070] Reference Figure 1-3 The screw jack 7 adopts existing technology available on the market. The output shaft of the screw jack 7 is fixedly connected to the base plate 1. A guide slope 11 is provided on the inner side of the top surface of the base plate 1. The guide slope 11 slopes inward from bottom to top and is located on the inner side of the cylinder 2. Before the top surface of the base plate 1 and the bottom surface of the cylinder 2 are connected, the screw jack 7 is started to raise the output shaft of the screw jack 7. When the output shaft of the screw jack 7 rises, it carries the reduction motor assembly 41, the first lifting component and the base plate 1 to rise synchronously. The guide slope 11 of the base plate 1 contacts the inner wall of the cylinder 2 to complete the guidance. The top surface of the base plate 1 contacts the bottom surface of the cylinder 2 to complete the connection between the base plate 1 and the cylinder 2, which can play a good guiding role and facilitate the alignment of the base plate 1 and the cylinder 2. At the same time, the base plate 1, the geared motor assembly 41 and the electric cylinder 6 are raised by most of the distance, so that the connecting bolt 42 is close to the connecting nut 8. Then the connecting bolt 42 is raised by the electric cylinder 6. At this time, the distance raised by the electric cylinder 6 does not need to be too large, making the operation more convenient and reliable.

[0071] Secondly, this application discloses a 3D printer:

[0072] A 3D printer includes the aforementioned rotary locking alignment detachable molding cylinder.

[0073] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rotary locking alignment detachable molding cylinder, comprising a base plate and a molding cylinder body, the molding cylinder body comprising a cylinder body (2), a piston assembly (31) and a printing substrate (3), the base plate (1) being disposed at the bottom of the cylinder body (2), the printing substrate (3) being disposed within the cylinder body (2) via the piston assembly (31), the piston assembly (31) being adapted to the cylinder body (2), and further comprising: The limiting component, the geared motor assembly (41), the mounting assembly and the first lifting component are provided. The limiting component is disposed inside the cylinder body (2) and is supported below the piston assembly (31) to restrict the piston assembly (31) from moving downward. The first lifting component is fixedly installed on the base plate (1) and connected to the geared motor assembly (41) for driving the geared motor assembly (41) to lift; the geared motor assembly (41) is provided with a connecting bolt (42), and the geared motor assembly (41) is used to control the rotation of the connecting bolt (42); The mounting assembly is fixedly connected to the piston assembly (31). The mounting assembly includes a connecting nut (8). The connecting bolt (42) can rise with the geared motor assembly (41) to be threadedly connected to the connecting nut (8) to perform rotational locking of the connecting bolt (42) and the connecting nut (8). The base plate (1) is detachably connected to the cylinder body (2).

2. The rotary locking alignment detachable forming cylinder according to claim 1, characterized in that: The mounting assembly also includes a mounting cylinder (5), a mounting ring (52), and a compression spring (53). The connecting nut (8) is disposed inside the mounting cylinder (5). The inner hole of the mounting cylinder (5) is a polygonal hole (51). The mounting ring (52) is fixedly connected to the bottom surface of the mounting cylinder (5). The top of the connecting nut (8) is provided with a polygonal limiting plate (43), the compression spring (53) is placed on the top of the mounting ring (52), the top of the compression spring (53) abuts against the bottom surface of the polygonal limiting plate (43), the side wall of the mounting cylinder (5) limits the polygonal limiting plate (43) in the horizontal direction, and the top of the polygonal limiting plate (43) abuts against the top inside the mounting cylinder (5); The compression spring (53) is used in conjunction with the connecting bolt (42) to control the locking force of the connecting nut (8).

3. The rotary locking alignment detachable molding cylinder according to claim 2, characterized in that: The lower part of the inner hole of the mounting ring (52) is gradually widened from top to bottom, and the lower part of the inner hole of the connecting nut (8) is gradually widened from top to bottom, so that the connecting bolt (42) can be guided and aligned to enter the connecting nut (8).

4. The rotary locking alignment detachable molding cylinder according to claim 2, characterized in that: It also includes a second lifting component, the output shaft of which is fixedly connected to the base plate (1). The inner side of the top surface of the base plate (1) is provided with a guide slope (11). After the guide slope (11) is raised by the second lifting component, it is located inside the cylinder (2) so that the cylinder can be guided and aligned.

5. A rotary locking alignment detachable molding cylinder according to claim 2, characterized in that: The geared motor assembly (41) includes a mounting cover (4) and a drive component. The drive component is disposed on the mounting cover (4) and is used to drive the connecting bolt (42) to rotate. As the first lifting member rises, the top of the mounting cover (4) contacts the bottom plane of the mounting ring (52). During the subsequent printing process, the piston assembly (31) rises inside the cylinder (2).

6. A rotary locking alignment detachable molding cylinder according to claim 2, characterized in that: There is a space between the outer periphery of the polygonal limiting disk (43) and the polygonal hole (51); The top of the polygonal limiting plate (43) is fixedly provided with an arc-shaped protrusion (44), and an arc-shaped groove (55) is provided on the top wall of the mounting cylinder (5) for the arc-shaped protrusion (44) to move. The arc of the arc-shaped groove (55) is greater than the arc of the arc-shaped protrusion (44).

7. A rotary locking alignment detachable molding cylinder according to claim 5, characterized in that: The driving component includes a rotating motor (411), a worm gear (412), and a worm (413). The rotating motor (411) is fixedly mounted on the side of the mounting cover (4). The rotating shaft of the rotating motor (411) passes through the mounting cover (4) and extends into the interior of the mounting cover (4). The worm gear (412) and the worm (413) are both located inside the mounting cover (4). The worm gear (412) is fixedly connected to the rotating shaft of the rotating motor (411). The connecting bolt (42) is fixedly connected to the worm gear (412) and is coaxial with the worm gear (412). The worm gear (412) meshes with the worm (413).

8. A 3D printer, characterized in that: Including a rotary locking alignment detachable molding cylinder as described in any one of claims 1-7.

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