3D Printing Platform Connecting and Locking Mechanism and 3D Printer

Abstract

The present application discloses a 3D printing platform connection locking mechanism and a 3D printer, the 3D printing platform connection locking mechanism comprises: a printing platform assembly and a printer lifting bracket; wherein the printer lifting bracket comprises a connecting seat and a locking fixed cantilever fixedly connected to the connecting seat, the connecting seat being used to connect to the motion output end of the printer lifting mechanism; the printing platform assembly comprises a printing platform and a mounting seat arranged on the printing platform, the mounting seat being provided with a mounting slot for plugging and cooperating with the locking fixed cantilever; a locking block is arranged in the locking fixed cantilever, an electric drive assembly is arranged in the connecting seat, the locking block is transmission-connected with the output end of the electric drive assembly, and can be driven by the electric drive assembly to extend the locking fixed cantilever and press against the inner wall of the mounting slot or retract into the locking fixed cantilever. The present application solves the problems in the related art that the connection structure of the 3D printing platform is complicated to disassemble and assemble, has low efficiency and is structurally unstable.

Description

Technical Field

[0001] The present application relates to the technical field of 3D printing equipment, and in particular to a 3D printing platform connection locking mechanism and a 3D printer. Background Art

[0002] Most existing 3D printers use screws for locking. When disassembling the printing platform, you need to manually loosen or tighten the connecting screws before you can complete the disassembly and assembly steps. Some printers also use magnets to connect the printer bracket to the 3D printing platform. The 3D printing platform is connected to the components and the 3D printer lifting bracket through magnets. The 3D printing platform can be dismantled by manually rotating and separating the connecting magnets with the magnet adjustment handle.

[0003] However, the screw connection method requires the screws to be disassembled and assembled during actual use, which is cumbersome and inefficient. The magnet connection method is convenient for disassembly and assembly, but the structure is unstable and may move or fall off due to improper installation, vibration and other factors. Summary of the invention

[0004] The main purpose of the present application is to provide a 3D printing platform connection locking mechanism and a 3D printer, so as to solve the problems in the related art that the connection structure of the 3D printing platform is complicated to disassemble and assemble, inefficient and structurally unstable.

[0005] In order to achieve the above-mentioned purpose, the present application provides a 3D printing platform connection locking mechanism, which includes: a printing platform component and a printer lifting bracket; wherein,

[0006] The printer lifting bracket comprises a connecting seat and a locking fixed cantilever fixedly connected to the connecting seat, wherein the connecting seat is used to be connected to the motion output end of the printer lifting mechanism;

[0007] The printing platform assembly comprises a printing platform and a mounting seat arranged on the printing platform, wherein the mounting seat is provided with a mounting groove which is plugged and matched with the locking and fixing cantilever;

[0008] A locking block is arranged in the locking and fixing cantilever, and an electric drive assembly is arranged in the connecting seat. The locking block is transmission-connected to the output end of the electric drive assembly and can be driven by the electric drive assembly to extend out of the locking and fixing cantilever and press against the inner wall of the mounting groove or be retracted into the locking and fixing cantilever.

[0009] Furthermore, the inner side wall of at least one side of the installation groove has a first locking inclined surface inclined upward, and the locking block can be driven to move linearly toward or away from the first locking inclined surface in the horizontal direction;

[0010] One end of the locking block close to the first locking inclined surface is configured as a second locking inclined surface that is in contact with the first locking inclined surface.

[0011] Further, the electric drive assembly includes a drive shaft rotatably arranged in the locking fixed cantilever, and a drive steering gear arranged in the connecting seat, and the drive steering gear is drivingly connected to the drive shaft;

[0012] The axis of the driving shaft is perpendicular to the moving direction of the locking block, and an eccentric driving part is provided on the driving shaft;

[0013] The locking fixed cantilever is provided with a first sliding groove matching the moving direction of the locking block, the locking fixed cantilever is provided with a first spring, the locking block is slidably arranged in the first sliding groove and connected to the first spring; the eccentric driving part is in contact with the locking block.

[0014] Furthermore, a guide column is provided in the locking fixed cantilever, and the guide column is arranged along the moving direction of the locking block. The part of the locking block located in the locking fixed cantilever is slidably sleeved on the guide column, and the first spring is sleeved on the guide column.

[0015] Further, the locking block includes a first locking portion and a second locking portion;

[0016] The first locking portion is slidably disposed in the first sliding groove, and the second locking inclined surface is provided on the first locking portion; the second locking portion is slidably disposed in the locking fixed cantilever, and the sliding direction of the second locking portion is the same as the sliding direction of the first locking portion;

[0017] One end of the first locking portion away from the first locking inclined surface is slidably locked in the second locking portion and connected to the second locking portion via a second spring;

[0018] One end of the second locking portion away from the first locking portion is configured as a concave arc surface, and the arc surface abuts against the eccentric driving portion.

[0019] Furthermore, a drive shaft mounting hole is provided in the locking and fixing cantilever, and the drive shaft is rotatably arranged in the drive shaft mounting hole;

[0020] The mounting seat is provided with an adjustment hole corresponding to the drive shaft mounting hole, the adjustment hole is communicated with the mounting groove and is coaxial with the drive shaft;

[0021] The adjusting hole is detachably provided with an adjusting handle, the adjusting handle is rotatably connected to the adjusting hole, the adjusting handle has an adjusting portion that can be plugged into the driving shaft, and the driving shaft can be rotated by rotating the adjusting handle.

[0022] Furthermore, a magnet that is magnetically attracted to the mounting seat is provided at one end of the connecting seat facing the mounting seat.

[0023] Furthermore, a probe rod corresponding to the end surface of the mounting seat is provided in the connecting seat, and the probe rod can move linearly toward or away from the mounting seat in the connecting seat;

[0024] A third spring is arranged in the connection seat, and the third spring is connected to the probe rod. A detection hole is opened on the probe rod, and a beam-type photoelectric signal transmitting end and a beam-type photoelectric signal receiving end are arranged on both sides of the probe rod;

[0025] Under the action of the third spring, when the locking fixed cantilever is inserted into the set position in the installation groove, the outgoing light of the opposite-beam photoelectric signal transmitting end is blocked by the probe rod;

[0026] When the locking and fixing cantilever is not inserted to the set position in the installation groove, the outgoing light of the opposing photoelectric signal transmitting end passes through the detection hole and is received by the opposing photoelectric signal receiving end.

[0027] Furthermore, the probe rod extends out of the connecting seat toward one end of the mounting seat.

[0028] Furthermore, a guide hole is provided on the probe rod, a guide rod is provided in the connecting seat, the guide rod is perpendicular to the moving direction of the probe rod, the upper end of the guide rod passes through the guide hole, and the length of the guide hole matches the moving stroke of the probe rod.

[0029] In an embodiment of the present application, a printing platform assembly and a printer lifting bracket are provided; wherein the printer lifting bracket includes a connecting seat and a locking fixed cantilever fixedly connected to the connecting seat, and the connecting seat is used to be connected to the motion output end of the printer lifting mechanism; the printing platform assembly includes a printing platform and a mounting seat provided on the printing platform, and the mounting seat is provided with a mounting groove which is plugged into and matched with the locking fixed cantilever; a locking block is provided in the locking fixed cantilever, and an electric drive assembly is provided in the connecting seat, and the locking block is transmission-connected to the output end of the electric drive assembly, and can be driven by the electric drive assembly to extend the locking fixed cantilever and press against or retract the inner wall of the mounting groove. The locking fixed cantilever achieves the purpose of quickly and stably disassembling and assembling the 3D printing platform and the printer lifting bracket by inserting the locking fixed cantilever of the printer lifting bracket into the mounting seat of the printing platform assembly during installation, and the electric drive assembly controls the locking block to extend and press against the inner wall of the mounting groove to complete the connection and locking of the printing platform and the printer lifting bracket. During disassembly, the electric drive assembly only needs to control the locking block to retract to disengage the mounting seat and the locking fixed cantilever, thereby achieving the technical effect of enabling the 3D printing platform and the printer lifting bracket to be disassembled and assembled quickly and stably, thereby solving the problems of cumbersome disassembly and assembly operation, low efficiency and unstable structure of the connection structure of the 3D printing platform in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings forming a part of this application are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic drawings of exemplary embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0031] Figure 1 is a schematic exploded structure diagram according to an embodiment of this application;

[0032] Figure 2 is a schematic assembly structure diagram of an adjusting handle according to an embodiment of this application;

[0033] Figure 3 is a schematic assembly structure diagram according to an embodiment of this application;

[0034] Figure 4 is a schematic top - view internal structure diagram of a connecting seat and a locking and fixing cantilever according to an embodiment of this application;

[0035] Figure 5 is a schematic axonometric internal structure diagram of a connecting seat and a locking and fixing cantilever according to an embodiment of this application;

[0036] Figure 6 is a schematic cross - sectional structure diagram when not locked after assembly according to an embodiment of this application;

[0037] Figure 7 is a schematic cross - sectional structure diagram when locked after assembly according to an embodiment of this application;

[0038] Wherein, 1 is a connecting seat, 2 is a magnet, 3 is a locking and fixing cantilever, 4 is a probe, 5 is an electric drive assembly, 51 is a drive shaft, 52 is an eccentric drive part, 53 is a drive servo, 6 is a printing platform, 7 is a mounting seat, 8 is an adjusting handle, 9 is an adjusting hole, 10 is a mounting groove, 101 is a first locking inclined surface, 11 is an adjusting part, 12 is a locking block, 121 is a first locking part, 122 is a second locking part, 123 is a second locking inclined surface, 13 is a first spring, 14 is a guiding column, 16 is a guiding rod, 17 is a guiding hole, 18 is an emitter of a transmissive photoelectric signal, 19 is a receiver of a transmissive photoelectric signal, 20 is a detection hole, 21 is a third spring, 22 is a second spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solution in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0040] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here.

[0041] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0042] Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0043] In addition, terms such as "arranged", "provided with", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In addition, the meaning of the term "plural" should be two or more.

[0045] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0046] Most existing 3D printers use screws for locking. When disassembling the printing platform, you need to manually loosen or tighten the connecting screws before you can complete the disassembly and assembly steps. Some printers also use magnets to connect the printer bracket to the 3D printing platform. The 3D printing platform is connected to the components and the 3D printer lifting bracket through magnets. The 3D printing platform can be dismantled by manually rotating and separating the connecting magnets with the magnet adjustment handle.

[0047] However, the screw connection method requires the screws to be disassembled and assembled during actual use, which is cumbersome and inefficient. The magnet connection method is convenient for disassembly and assembly, but the structure is unstable and may move or fall off due to improper installation, vibration and other factors.

[0048] To solve the above technical problems, Figures 1 to 7 As shown, the embodiment of the present application provides a 3D printing platform connection locking mechanism, which includes: a printing platform component and a printer lifting bracket; wherein,

[0049] The printer lifting bracket comprises a connecting seat 1 and a locking fixed cantilever 3 fixedly connected to the connecting seat 1, wherein the connecting seat 1 is used to be connected to the motion output end of the printer lifting mechanism;

[0050] The printing platform 6 assembly includes a printing platform 6 and a mounting seat 7 disposed on the printing platform 6, and a mounting groove 10 is provided on the mounting seat 7 to be plugged and matched with the locking and fixing cantilever 3;

[0051] A locking block 12 is arranged in the locking and fixing cantilever 3, and an electric drive assembly 5 is arranged in the connecting seat 1. The locking block 12 is transmission-connected to the output end of the electric drive assembly 5, and can be driven by the electric drive assembly 5 to extend out of the locking and fixing cantilever 3 and press against the inner wall of the mounting groove 10 or be retracted into the locking and fixing cantilever 3.

[0052] In this embodiment, the connection locking mechanism is mainly composed of two parts: a printing platform 6 component and a printer lifting bracket. The printer lifting bracket can be connected to the motion output end of the printer lifting mechanism, and the printer lifting bracket is driven to rise and fall by the printer lifting mechanism. The printer lifting bracket is connected to the printing platform 6 component, thereby driving the printing platform 6 component to rise and fall synchronously.

[0053] The printer lifting bracket is composed of a connecting seat 1 and a locking fixed cantilever 3. The locking fixed cantilever 3 is fixedly connected to the connecting seat 1 and can be installed at the end of the connecting seat 1. The connecting seat 1 can be connected to the motion output end of the printer lifting mechanism. The printing platform 6 assembly is composed of a printing platform 6 and a mounting seat 7. The printing platform 6 serves as the execution end of 3D printing. The mounting seat 7 can be fixedly installed on the upper end of the printing platform 6, and the two can be connected by bolts.

[0054] like Figures 1 to 3As shown, in this embodiment, the connection between the printing platform 6 component and the printer lifting bracket is mainly achieved through the mounting seat 7 and the locking and fixing cantilever 3. Specifically, an installation groove 10 is formed in the mounting seat 7, and the locking and fixing cantilever 3 can be inserted into the installation groove 10. The opening direction of the installation groove 10 can be the horizontal direction. During installation, the printing platform 6 component can be pushed horizontally to insert the locking and fixing cantilever 3 into the installation groove 10. At this time, the installation groove 10 and the locking and fixing cantilever 3 are in a sliding connection, and there is a certain gap between them, resulting in an unstable structure (as shown in Figure 6 ). Therefore, to increase the stability of the connection, a movable locking block 12 and an electric drive assembly 5 are provided in the locking and fixing cantilever 3. The locking block 12 can extend out of the locking and fixing cantilever 3 and then retract into the locking and fixing cantilever 3 under the action of the electric drive assembly 5. When it is necessary to stably connect the locking and fixing cantilever 3 with the installation groove 10, the electric drive assembly 5 can be controlled to drive the locking block 12 to extend out of the locking and fixing cantilever 3 and abut against the inner wall of the installation groove 10 (as shown in Figure 7 ). Under the push of the locking block 12, a part of the inner side wall of the installation groove 10 will overcome the original gap and closely fit with a part of the side wall of the locking and fixing cantilever 3. Therefore, under the action of the static friction force between the fitting part and the locking block 12, the mounting seat 7 and the locking and fixing cantilever 3 will maintain a stable connection. When unlocking is required, only by controlling the electric drive assembly 5 to drive the locking block 12 to retract into the locking and fixing cantilever 3 can the installation groove 10 and the locking and fixing cantilever 3 maintain an easily pluggable and unplugable movable connection relationship.

[0055] In this embodiment, when installing, the locking and fixing cantilever 3 of the printer lifting bracket is inserted into the mounting seat 7 of the printing platform component, and the electric drive assembly 5 controls the locking block 12 to extend out and abut against the inner wall of the installation groove 10, then the connection between the printing platform 6 and the printer lifting bracket can be locked. When disassembling, only by controlling the electric drive assembly 5 to retract the locking block 12 can the mounting seat 7 and the locking and fixing cantilever 3 be disengaged from the fixing connector, thus achieving the technical effect of enabling the 3D printing platform and the printer lifting bracket to be quickly and stably disassembled and assembled, and further solving the problems of cumbersome disassembly and assembly operations, low efficiency, and unstable structure of the connection structure of the 3D printing platform in the related art.

[0056] Since the locking and fixing cantilever 3 is fixed to the installation groove 10 by means of static friction, in order to make the connection between the locking and fixing cantilever 3 and the installation groove 10 more stable, when the locking block 12 abuts against the inner wall of one side of the installation groove 10, the installation groove 10 needs to have as many parts as possible that fit the locking and fixing cantilever 3. Taking the locking and fixing cantilever 3 as a square with four ring sides located in the installation groove 10 as an example, when the locking block 12 passes through one side of the locking and fixing cantilever 3 and abuts against one inner wall of the installation groove 10, only the side of the locking and fixing cantilever 3 in the direction of the thrust applied by the locking block 12 will abut against the inner wall of the installation groove 10, while the other two sides cannot abut against the inner wall of the installation groove 10.

[0057] Therefore, in order to increase the contact surface between the locking and fixing cantilever 3 and the installation groove 10, as Figure 6 and Figure 7 shown, in this embodiment, the inner wall of at least one side of the installation groove 10 has a first locking inclined surface 101 that slopes upward. The locking block 12 can be driven to move linearly in the horizontal direction towards or away from the first locking inclined surface 101; one end of the locking block 12 close to the first locking inclined surface 101 is provided with a second locking inclined surface 123 that fits the first locking inclined surface 101.

[0058] Specifically, when the first locking inclined surface 101 is located on a side wall in the horizontal direction of the installation groove 10, the locking block 12 moves laterally towards the first locking inclined surface 101 and applies a thrust to the first locking inclined surface 101 through the second locking inclined surface 123. Since the inclination direction of the inclined surface is upward, the lateral thrust is decomposed into two component forces, one lateral and one vertically upward. The lateral component force will cause the inner wall of the side of the installation groove 10 opposite to the first locking inclined surface 101 to be in close contact with one side surface of the locking and fixing cantilever 3, and the vertically upward component force will cause the inner wall of the lower end of the installation groove 10 to be in close contact with the lower surface of the locking and fixing cantilever 3. Therefore, through the setting of the first locking inclined surface 101 and the second locking inclined surface 123, there are at least two close contact surfaces between the locking and fixing cantilever 3 and the installation groove 10. Coupled with the close contact between the locking block 12 and the installation groove 10, the static friction generated between the two can meet the requirements of stable connection.

[0059] At the same time, through the setting of the first locking inclined surface 101 and the second locking inclined surface 123, the connection locking mechanism can use the lower surface of the locking and fixing cantilever as the connection reference surface, which can improve the interchangeability of the printing platform and meet the moving conditions of the printing platform.

[0060] The locking action of the locking block 12 is driven by the electric drive assembly 5. The structure of the electric drive assembly 5 will be specifically described in this embodiment:

[0061] As Figure 5As shown in the figure, the electric drive assembly 5 includes a drive shaft 51 rotatably arranged in the locking and fixing cantilever 3 and a drive servo 53 arranged in the connecting seat 1. The drive servo 53 is in transmission connection with the drive shaft 51, and the drive shaft 51 can be driven by the drive servo 53 to deflect forward and backward;

[0062] The axis of the drive shaft 51 is perpendicular to the moving direction of the locking block 12, and an eccentric drive portion 52 is arranged on the drive shaft 51; a first sliding groove matching the moving direction of the locking block 12 is formed in the locking and fixing cantilever 3, a first spring 13 is arranged in the locking and fixing cantilever 3, the locking block 12 is slidably arranged in the first sliding groove and connected with the first spring 13; the eccentric drive portion 52 is in contact connection with the locking block 12.

[0063] When the locking block 12 is not subjected to the thrust of the eccentric drive portion 52, the locking block 12 retracts into the locking and fixing cantilever 3 under the action of the first spring 13; when locking is required, the drive servo 53 is controlled to drive the drive shaft 51 to rotate, so that the eccentric drive portion 52 can rotate synchronously and push the locking block 12 outwards and stretch the first spring 13 as the rotation progresses until the locking block 12 abuts against the inner wall of the installation groove 10. The eccentric drive portion 52 can be an eccentric block arranged in the middle of the drive shaft 51, and the axis of the eccentric block does not coincide with the axis of the drive shaft 51, or the eccentric drive portion 52 is a cam installed in the middle of the drive shaft 51.

[0064] During the locking and unlocking processes, the locking block 12 needs to slide linearly in the first sliding groove. Therefore, in order to make the sliding stroke of the locking block 12 accurate, a guiding column 14 is arranged in the locking and fixing cantilever 3 of this embodiment. The guiding column 14 is arranged along the moving direction of the locking block 12, and the part of the locking block 12 located in the locking and fixing cantilever 3 is slidably sleeved on the guiding column 14. The guiding column 14 can be arranged in two and located at both ends of the locking block 12, and the first spring 13 is sleeved on the guiding column 14. In this embodiment, the locking block 12 can be arranged in a T-shaped structure, and its protruding part slides in the first sliding groove, and the rear end is located in the locking and fixing cantilever 3 and is slidably sleeved with the guiding column 14.

[0065] This embodiment specifically describes the structure of the locking block 12:

[0066] As Figure 5 、 Figure 6 and Figure 7 shown, the locking block 12 includes a first locking portion 121 and a second locking portion 122; the first locking portion 121 is slidably arranged in the first sliding groove, and a second locking inclined surface 123 is formed on the first locking portion; the second locking portion 122 is slidably arranged in the locking and fixing cantilever 3, and a cavity for accommodating the second locking portion 122 is formed in the locking and fixing cantilever 3. The cavity is communicated with the first sliding groove, and the sliding direction of the second locking portion 122 is the same as the sliding direction of the first locking portion 121;

[0067] One end of the first locking portion 121 away from the first locking inclined surface 101 is slidably clamped in the second locking portion 122. Specifically, a clamping groove is formed in the second locking portion 122. The clamping groove can be a T-shaped groove, which includes a first groove body with a larger opening and a second groove body with a smaller opening (as Figure 6 and Figure 7 shown). One end of the first locking portion 121 facing the second locking portion 122 has a protruding clamping portion, and the thickness of the clamping portion is less than the thickness of the first locking portion 121. During installation, the first locking portion 121 is inserted into the clamping groove, and the clamping portion is located in the second groove body. A part of the first locking portion 121 is located in the first groove body. A second spring 22 is installed in the first groove body, and the second spring 22 is connected to the end of the first locking portion 121. The locking action of the locking block 12 is realized by the eccentric driving portion 52 pushing the second locking portion 122, and the second locking portion 122 pushes the first locking portion 121 to achieve.

[0068] Since the driving process of the eccentric driving portion 52 is a rotational motion, in order to enable the eccentric driving portion 52 to stably push the second locking portion 122, one end of the second locking portion 122 away from the first locking portion 121 is set as a concave arc surface, and the arc surface abuts against the eccentric driving portion 52.

[0069] When using the driving servo 53 to realize the locking action of the locking block 12, there is no need to manually adjust the driving shaft 51, and only need to control the driving servo 53 to start. In some cases, it is still necessary to manually adjust the driving shaft 51 (for example, the driving servo 53 is damaged). Therefore, to meet this requirement, a driving shaft mounting hole is provided in the locking and fixing cantilever 3 in this embodiment. The driving shaft 51 is rotatably arranged in the driving shaft mounting hole; the mounting seat 7 is provided with an adjusting hole 9 corresponding to the driving shaft mounting hole of the driving shaft 51. The adjusting hole 9 communicates with the mounting groove 10 and is coaxial with the driving shaft 51; an adjusting handle 8 is detachably arranged on the adjusting hole 9. The adjusting handle 8 is rotatably connected to the adjusting hole 9. The adjusting handle 8 has an adjusting portion 11 that can be inserted into the driving shaft 51. By rotating the adjusting handle 8, the driving shaft 51 can be rotated.

[0070] As Figure 1 and Figure 2 shown, when manual locking operation is required, the adjusting handle 8 can be inserted into the adjusting hole 9 of the mounting seat 7, and the adjusting portion 11 of the adjusting handle 8 is inserted into the driving shaft 51. The groove for inserting the adjusting portion 11 in the driving shaft 51 should be set as non-circular, such as square, polygonal or semi-circular, etc. By rotating the adjusting handle 8, the driving shaft 51 can be rotated, so that the locking block 12 performs locking or unlocking actions.

[0071] The connection process between the mounting base 7 and the locking and fixing cantilever 3 is as follows: First, the mounting base 7 is sleeved on the locking and fixing cantilever 3, and then the locking block 12 inside the locking and fixing cantilever 3 extends out and abuts tightly in the mounting groove 10 of the mounting base 7. Therefore, to facilitate the pre-positioning of the locking and fixing cantilever 3 in the mounting base 7 and improve the accuracy of the connection position, a magnet 2 that magnetically attracts the mounting base 7 is provided at one end of the connecting seat 1 facing the mounting base 7. When the mounting base 7 is sleeved on the locking and fixing cantilever 3, the magnet 2 attracts the mounting base 7, so that the mounting base 7 can be initially connected and positioned on the locking and fixing cantilever 3. The mounting base 7 can be made of a metal that can be magnetically attracted, or a strong magnet is embedded in the end face of the mounting base 7.

[0072] During the use of the printing platform 6, the printing platform 6 will move for a long time. Therefore, to accurately and timely obtain the connection situation between the mounting base 7 and the locking and fixing cantilever 3, and to ensure that the mounting base 7 and the locking and fixing cantilever 3 are connected in place during connection. As Figure 5 shown, a probe rod 4 corresponding to the end face of the mounting base 7 is provided inside the connecting seat 1 in this embodiment. The probe rod 4 can move linearly toward or away from the mounting base 7 inside the connecting seat 1;

[0073] A third spring 21 is provided inside the connecting seat 1. The third spring 21 is connected to the probe rod 4. A detection hole 20 is provided on the probe rod 4. An opposed photoelectric signal transmitter 18 and an opposed photoelectric signal receiver 19 are provided on both sides of the probe rod 4;

[0074] Under the action of the third spring 21, when the locking and fixing cantilever 3 is inserted into the set position in the mounting groove 10, that is, when the locking and fixing cantilever 3 is connected to the mounting base 7 in place, the probe rod 4 is squeezed by the end face of the mounting base 7 and moves backward a certain distance. At this time, the outgoing light of the opposed photoelectric signal transmitter 18 is blocked by the probe rod 4;

[0075] When the locking and fixing cantilever 3 is not inserted into the set position in the mounting groove 10, that is, when the probe rod 4 is not squeezed by the mounting base 7 or the squeezing force is not enough to make the probe rod 4 retreat the set stroke, the outgoing light of the opposed photoelectric signal transmitter 18 passes through the detection hole 20 and is received by the opposed photoelectric signal receiver 19.

[0076] Before the probe rod 4 is stressed before installation, the third spring 21 is in an uncompressed state. At this time, the probe rod 4 can extend out of the connecting seat 1 under the action of the third spring 21. During installation, the probe rod 4 will contact the end face of the mounting seat 7 and move away from the mounting seat 7 as the installation progresses, compressing the third spring 21. When the outgoing light of the opposed photoelectric signal transmitting end 18 is blocked by the probe rod 4, the opposed photoelectric signal receiving end 19 cannot receive the photoelectric signal, indicating that the connection is stable. When the opposed photoelectric signal receiving end 19 receives the photoelectric signal, it indicates that the connection is loose and needs to be adjusted. By judging whether the opposed photoelectric signal receiving end 19 receives the photoelectric signal, it can be determined whether the connection between the mounting seat 7 and the locking and fixing cantilever 3 is stable. The detection process can be carried out during installation and is also synchronized during the operation of the printing platform 6, so as to detect the connection status of the 3D printing lifting bracket and the 3D printing platform 6 components in real time.

[0077] In this embodiment, the working process of the connection locking mechanism is as follows:

[0078] Manually insert the mounting seat 7 connected to the printing platform 6 onto the locking and fixing cantilever 3. When the magnet 2 attracts, the mounting seat 7 fits with the connecting seat 1. At this time, judge whether the connection is in place according to the signal received by the opposed photoelectric signal receiving end 19. If not, re-insert it. If so, control the driving servo 53 to drive the driving shaft 51 to rotate, so that the locking block 12 extends out of the locking and fixing cantilever 3 and abuts against the inner wall of the mounting groove 10. After abutting, the printing platform 6 operates normally, and the signal received by the opposed photoelectric signal receiving end 19 is obtained in real time during the operation. When the opposed photoelectric signal receiving end 19 receives the photoelectric signal, a fault alarm is issued, and the printing platform 6 pauses, and the operator re-inserts it. If the driving servo 53 cannot control the driving shaft 51 to rotate, the driving shaft 51 is rotated by the adjusting handle 8 to complete the locking. When unlocking is required, an unlocking signal is input to the driving servo 53, the driving servo 53 drives the driving shaft 51 to rotate, the locking block 12 retracts into the locking and fixing cantilever 3, and the printing platform 6 can be taken away.

[0079] In this embodiment, the driving servo 53 is used to control the locking and unlocking actions of the locking block 12, and the opposed photoelectric signal transmitting end 18 and the opposed photoelectric signal receiving end 19 are used in cooperation to judge whether the current connection is stable. Therefore, in the whole process, there will be no situation where the connection is unstable due to vibration or other reasons when using the magnet 2 alone. If there is strong external force interference causing the connection to be unstable, an alarm signal will also be detected and issued. At the same time, during disassembly and assembly, the driving servo 53 and the locking block 12 are controlled according to the signal to assist in disassembly and assembly, and there will be no cumbersome operations such as tightening and loosening screws like screw connections.

[0080] Since the probe rod 4 needs to move linearly, in order to make the movement process of the probe rod 4 accurate, a guide hole 17 is provided on the probe rod 4, a guide rod 16 is arranged in the connecting seat 1, the guide rod 16 is perpendicular to the moving direction of the probe rod 4, the upper end of the guide rod 16 passes through the guide hole 17, and the length of the guide hole 17 matches the moving stroke of the probe rod 4.

[0081] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A 3D printing platform connection locking mechanism, characterized in that, include: Printing platform assembly and printer lifting bracket; wherein, The printer lifting bracket comprises a connecting seat and a locking fixed cantilever fixedly connected to the connecting seat, wherein the connecting seat is used to be connected to the motion output end of the printer lifting mechanism; The printing platform assembly comprises a printing platform and a mounting seat arranged on the printing platform, wherein the mounting seat is provided with a mounting groove which is plugged and matched with the locking and fixing cantilever; A locking block is arranged in the locking and fixing cantilever, and an electric drive assembly is arranged in the connecting seat. The locking block is transmission-connected with the output end of the electric drive assembly, and can be driven by the electric drive assembly to extend out of the locking and fixing cantilever and abut against the inner wall of the mounting groove or be retracted into the locking and fixing cantilever; A probe rod corresponding to the end surface of the mounting seat is arranged in the connecting seat, and the probe rod can move linearly toward or away from the mounting seat in the connecting seat; A third spring is arranged in the connection seat, and the third spring is connected to the probe rod. A detection hole is opened on the probe rod, and a beam-type photoelectric signal transmitting end and a beam-type photoelectric signal receiving end are arranged on both sides of the probe rod; Under the action of the third spring, when the locking fixed cantilever is inserted into the set position in the installation groove, the outgoing light of the opposite-beam photoelectric signal transmitting end is blocked by the probe rod; When the locking fixed cantilever is not inserted to the set position in the installation groove, the outgoing light of the opposite-beam photoelectric signal transmitting end passes through the detection hole and is received by the opposite-beam photoelectric signal receiving end; The inner side wall of at least one side of the installation groove has a first locking inclined surface inclined upward, and the locking block can be driven to move linearly toward or away from the first locking inclined surface in the horizontal direction; One end of the locking block close to the first locking inclined surface is configured as a second locking inclined surface that fits the first locking inclined surface; The electric drive assembly includes a drive shaft rotatably arranged in the locking fixed cantilever, and a drive steering gear arranged in the connecting seat, and the drive steering gear is drivingly connected to the drive shaft; The axis of the driving shaft is perpendicular to the moving direction of the locking block, and an eccentric driving part is provided on the driving shaft; The locking fixed cantilever is provided with a first sliding groove matching the moving direction of the locking block, the locking fixed cantilever is provided with a first spring, the locking block is slidably arranged in the first sliding groove and connected to the first spring; the eccentric driving part is in contact with the locking block.

2. The 3D printing platform connection and locking mechanism according to claim 1, characterized in that, A guide column is arranged in the locking fixed cantilever, and the guide column is arranged along the moving direction of the locking block. The part of the locking block located in the locking fixed cantilever is slidably sleeved on the guide column, and the first spring is sleeved on the guide column.

3. The 3D printing platform connection and locking mechanism according to claim 2, characterized in that, The locking block comprises a first locking portion and a second locking portion; The first locking portion is slidably disposed in the first sliding groove, and the second locking inclined surface is provided on the first locking portion; the second locking portion is slidably disposed in the locking fixed cantilever, and the sliding direction of the second locking portion is the same as the sliding direction of the first locking portion; One end of the first locking portion away from the first locking inclined surface is slidably clamped in the second locking portion and is connected to the second locking portion by a second spring; One end of the second locking portion away from the first locking portion is provided with an inwardly concave arc surface, and the arc surface abuts against the eccentric driving portion.

4. The 3D printing platform connection locking mechanism according to any one of claims 1 to 3, characterized in that, A driving shaft mounting hole is arranged in the locking and fixing cantilever, and the driving shaft is rotatably arranged in the driving shaft mounting hole; The mounting seat is provided with an adjusting hole corresponding to the driving shaft mounting hole, and the adjusting hole communicates with the mounting groove and is coaxial with the driving shaft; An adjusting handle is detachably arranged on the adjusting hole, the adjusting handle is rotatably connected to the adjusting hole, the adjusting handle has an adjusting portion that can be inserted into the driving shaft, and the driving shaft can be rotated by rotating the adjusting handle.

5. The 3D printing platform connection locking mechanism according to any one of claims 1 to 3, characterized in that, One end of the connecting seat facing the mounting seat is provided with a magnet magnetically attracted to the mounting seat.

6. The 3D printing platform connection and locking mechanism according to claim 1, characterized in that, One end of the probe rod facing the mounting seat extends out of the connecting seat.

7. The 3D printing platform connection and locking mechanism according to claim 6, characterized in that, A guiding hole is formed in the probe rod, a guiding rod is arranged in the connecting seat, the guiding rod is perpendicular to the moving direction of the probe rod, the upper end of the guiding rod passes through the guiding hole, and the length of the guiding hole matches the moving stroke of the probe rod.

8. A 3D printer, characterized in that, It includes a 3D printing platform connection locking mechanism according to any one of claims 1 to 7.

Images