Guard for suction and powder distribution mechanical systems and metal 3d printer

Abstract

The present application relates to the field of metal 3D printing, and specifically provides a protective device of a powder suction device and powder distributor mechanical system and a metal 3D printer, aiming at solving the problem that the existing sealing protective device cannot effectively shield the powder and smoke dust, thus being unsuitable for use in the metal 3D printer. For this purpose, the protective device comprises a forming bin partition plate, two groups of winding assemblies and two groups of cantilever sleeve assemblies, and the forming bin partition plate is used as a mounting base. The two groups of winding assemblies are configured to shield the corresponding notches to achieve Y-direction protection of the mechanical system, and the two groups of cantilever sleeve assemblies are slidingly connected with the slide and guide groove at the corresponding notches and can slide along them, while the corresponding winding assemblies achieve corresponding winding actions to adapt to the movement working conditions of the powder suction device and powder distributor. The two cantilever sleeve assemblies are also configured to achieve X-direction protection of the mechanical system. The present application not only has a simple structure, but also has substantially no gap, can effectively shield the powder and smoke dust, and thus is suitable for use in the metal 3D printer.

Description

Technical Field

[0001] This invention relates to the field of metal 3D printing (additive manufacturing), specifically providing a protective device for a powder suction device and a powder distributor mechanical system, as well as a metal 3D printer. Background Technology

[0002] Metal 3D printing is an advanced manufacturing technology that directly creates complex metal parts by depositing layers of metal material, breaking through the limitations of traditional processing methods on the structural complexity of parts. Metal 3D printing technology can be divided into various processes according to different material forms and energy sources. Among them, SLS technology (Selective Laser Sintering) is one of the commercially mature mainstream technologies.

[0003] Currently, the sealing and protective devices of metal 3D printers using SLS technology often adopt accordion-type or baffle-type protective devices. These sealing and protective devices are not only complex in structure but also have too many gaps and poor sealing effect, which means they cannot effectively block powder and dust, making them unsuitable for use with metal 3D printers.

[0004] Therefore, there is an urgent need to develop a protective device for the powder suction and powder distribution mechanical system of a metal 3D printer that can solve the above problems, as well as a metal 3D printer itself. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing sealing and protection devices have poor sealing effect and cannot effectively block powder and dust, thus making them unsuitable for use in metal 3D printers.

[0006] In a first aspect, the present invention provides a protective device for a powder suction device and a powder distributor mechanical system, the protective device comprising: The forming chamber partition has two slots arranged side by side along its length. Each slot has a slide rail on one side and a guide groove on the other side. The forming chamber partition serves as an installation base. Two sets of winding assemblies are correspondingly disposed at the ends of the two slots, and the two sets of winding assemblies are symmetrically arranged with respect to the axis of the forming chamber partition. The two sets of winding assemblies are configured to block the corresponding slots to achieve Y-axis protection of the mechanical system; and Two sets of cantilever sleeve assemblies correspond one-to-one with the two sets of winding assemblies. Each set of cantilever sleeve assemblies is fixedly connected to the corresponding winding assembly, and each set of cantilever sleeve assemblies is slidably connected to the slide rail and guide groove at the corresponding slot and can slide along them. At the same time, the corresponding winding assembly performs the corresponding winding action. The two cantilever sleeve assemblies are configured to pass through the corresponding powder suction cantilever and powder distributor cantilever. The two cantilever sleeve assemblies are also configured to provide X-axis protection for the mechanical system. Wherein, the length direction of the forming chamber partition is the Y direction, and the direction perpendicular to the Y direction is the X direction.

[0007] In the preferred embodiment of the protective device for the aforementioned powder suction and powder distribution mechanical system, each winding assembly includes: The first and second reels are positioned at opposite ends of the corresponding slots; Two spools pass through the first and second drums respectively, and a bearing is installed between each spool and its corresponding drum. Two spool supports are respectively disposed on one side of the first spool and the second spool, for supporting the corresponding spools; A steel strip, wound on the first and second drums; Two sets of stationary pulley assemblies are respectively arranged on the side of the first drum and the second drum near the shaft seat. Each set of stationary pulley assemblies includes a stationary pulley and a stationary pulley bearing. Two steel cables are used. One end of one cable is fixed to the corresponding cantilever sleeve assembly, and the other end of the cable is connected to the first drum via a stationary pulley at the second drum. The other cable is fixed to the corresponding cantilever sleeve assembly, and the other end of the cable is connected to the second drum via a stationary pulley at the first drum. Wherein, the steel strip and steel cable at the same drum in the first drum and the second drum are configured such that the steel cable is wound when the steel strip is released, or the steel cable is released when the steel strip is wound. Each set of winding assemblies is also configured such that the steel strip at the first drum is released and the steel strip at the second drum is wound, or the steel strip at the first drum is wound and the steel strip at the second drum is released.

[0008] In the preferred embodiment of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, each of the first drum and the second drum includes a steel cable drum section and a steel strip drum section according to function. The steel cable drum section is used to wind the steel cable, and the steel strip drum section is used to wind the steel strip. The outer wall of the steel strip drum section is provided with a groove for installing a pressure plate to fix the steel strip.

[0009] In the preferred embodiment of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, the two first rollers in the two sets of winding assemblies share one of the two rollers, and the two second rollers in the two sets of winding assemblies share the other roller.

[0010] In the preferred technical solution of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, each set of winding components further includes two sets of tensioning components arranged in opposite directions. The two sets of tensioning components are installed on the corresponding cantilever sleeve components through steel cable fixing plates. The two sets of tensioning components correspond one-to-one with the two steel cables, and each set of tensioning components is configured to tension and fix the corresponding steel cable.

[0011] In the preferred embodiment of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, each tensioning assembly includes a tension spring and a spring sleeve. The tension spring is installed and fixed at the end of the steel cable. The tension spring and the steel cable extend into the spring sleeve, and the spring sleeve provides motion guidance for the tension spring.

[0012] In the preferred technical solution of the protective device of the above-mentioned powder suction device and powder distributor mechanical system, the two sets of winding assemblies further include two guide plates. The two guide plates are correspondingly arranged between the two first rolls and the two second rolls of the two sets of winding assemblies. The two guide plates are fixedly connected to the corresponding roll seat. The guide plates are used to adjust the winding gap of the corresponding steel strip.

[0013] In the preferred technical solution of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, each cantilever sleeve assembly includes a cantilever sleeve, a sealing plate and a sealing plate baffle. The sealing plate is fixed to the inner circumferential wall of the cantilever sleeve through the sealing plate baffle. The sealing plate is used to achieve X-axis protection of the corresponding mechanical system.

[0014] In the preferred technical solution of the protective device for the above-mentioned powder suction device and powder distributor mechanical system, each set of cantilever sleeve assembly further includes a cantilever sleeve fixing plate, which is installed at the corresponding cantilever sleeve.

[0015] In a second aspect, the present invention also provides a metal 3D printer, the metal 3D printer including the protective device of the above-described powder suction and powder distribution mechanical system.

[0016] With the above technical solution adopted, the protective device for the powder suction and powder distribution mechanical system and the metal 3D printer of the present invention both include a forming chamber partition, two sets of winding assemblies, and two sets of cantilever sleeve assemblies. The forming chamber partition serves as a mounting base. The two sets of winding assemblies are configured to block the corresponding slots to achieve Y-axis protection of the mechanical system. The two sets of cantilever sleeve assemblies are slidably connected to the slides and guide grooves at the corresponding slots and can slide along them. At the same time, the corresponding winding assemblies perform corresponding winding actions to adapt to the movement conditions of the powder suction and powder distribution. The two cantilever sleeve assemblies are also configured to achieve X-axis protection of the mechanical system. The above structure of the present invention is not only simple but also basically seamless, effectively blocking powder and dust, and has a good sealing effect, thus making it suitable for use in metal 3D printers. Attached Figure Description

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 This is a schematic assembly diagram of the protective device of the powder suction device and powder distributor mechanical system according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic assembly diagram of the molding chamber partition, slide, and guide groove of the protective device; Figure 3 yes Figure 1 A schematic 3D view of the cantilever sleeve fixing plate with the protective device removed; Figure 4 yes Figure 3 A schematic enlarged view of A in the diagram; Figure 5 yes Figure 3 A schematic enlarged view of B in the diagram; Figure 6 yes Figure 3 A schematic 3D diagram showing the protective device with one steel strip removed. Figure 7 Figure 1 A schematic assembly diagram of the two first reels; Figure 8 yes Figure 7 A schematic assembly diagram of the two first reels at another angle; Figure 9 yes Figure 7 A schematic 3D view with the first roll and guide plate removed; Figure 10 yes Figure 9 A schematic three-dimensional diagram showing the removal of one of the first rolls; Figure 11 yes Figure 7 A schematic 3D view of the scroll; Figure 12 yes Figure 7A schematic assembly diagram of the first roll and the pressing plate; Figure 13 yes Figure 12 A schematic perspective view of the first roll in the middle; Figure 14 yes Figure 2 A schematic assembly drawing of the cantilever sleeve and tensioning assembly; Figure 15 yes Figure 14 A schematic perspective view of the tensioning component in the diagram; Figure 16 yes Figure 15 A schematic 3D view of the tensioning assembly when the spring sleeve is removed.

[0018] The symbols in the diagram represent the following meanings: Protective devices for the mechanical systems of the 100 powder suction and powder distributor. 1. Slide rail, 2. Guide groove, 3. Bearing, 4. Steel cable fixing plate, 5. Pressure plate 10 forming compartment partitions, 11 slots, 20-roll take-up assembly, 21 First drum, 211 Cable drum section, 212 Strip drum section, 213 Groove, 22 Second drum, 23 Shaft, 24 Shaft seat, 25 Strip, 26 Static pulley assembly, 261 Static pulley, 262 Static pulley bearing, 27 Cable, 28 Tensioning assembly, 281 Tension spring, 282 Spring sleeve, 29 Guide plate 30 cantilever sleeve assembly, 31 Cantilever sleeve, 32 Sealing plate, 33 Sealing plate baffle, 34 Cantilever sleeve fixing plate. Detailed Implementation

[0019] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0020] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] like Figure 1 As shown, see also Figures 2-16 To address the problem that existing sealing devices have poor sealing performance and cannot effectively block powder and dust, making them unsuitable for use with metal 3D printers, such as... Figure 1 As shown, the present invention provides a protective device 100 for a powder suction device and a powder distributor mechanical system. The protective device 100 includes: a forming chamber partition 10, two sets of winding assemblies 20, and two sets of cantilever sleeve assemblies 30. Figure 2 As shown, the molding chamber partition 10 has two side-by-side slots 11 along its length. Each slot 11 has a slide rail 1 on one side and a guide groove 2 on the other side. The two slots 11 share a single guide groove 2. The molding chamber partition 10 serves as a mounting base for installing other components of the protective device 100 besides the molding chamber partition 10. Figure 3 As shown, two sets of winding assemblies 20 are correspondingly disposed at the ends of the two slots 11, and the two sets of winding assemblies 20 are symmetrically arranged with respect to the axis of the forming chamber partition 10. The two sets of winding assemblies 20 are configured to block the corresponding slots 11 (see...). Figure 2 This achieves Y-axis protection for the mechanical system. Two sets of cantilever sleeve assemblies 30 are used to pass through the corresponding powder suction cantilever and powder distributor cantilever, such as... Figure 3 As shown, the upper set of cantilever sleeve assemblies 30 is used to pass through the powder suction cantilever, and the lower set of cantilever sleeve assemblies 30 is used to pass through the powder distributor cantilever. The two sets of cantilever sleeve assemblies 30 correspond one-to-one with the two sets of winding assemblies 20. Each set of cantilever sleeve assemblies 30 is fixedly connected to the corresponding winding assembly 20. Each set of cantilever sleeve assemblies 30 is slidably connected to the slide rail 1 and guide groove 2 at the corresponding slot 11 and can slide along them. Simultaneously, the corresponding winding assembly 20 performs a corresponding winding action, so that the cantilever sleeve assemblies 30 and winding assembly 20 can adapt to the corresponding powder suction cantilever and powder distributor cantilever actions. The two cantilever sleeve assemblies 30 are configured to pass through the corresponding powder suction cantilever and powder distributor cantilever, and the two cantilever sleeve assemblies 30 are also configured to achieve X-axis protection of the mechanical system. The length direction of the forming chamber partition 10 is the Y-axis, and the direction perpendicular to the Y-axis is the X-axis.

[0023] With the above technical solution adopted, the protective device 100 of the powder suction and powder distribution mechanical system of the present invention includes a forming chamber partition 10, two sets of winding assemblies 20, and two sets of cantilever sleeve assemblies 30. The forming chamber partition 10 serves as the mounting base. The two sets of winding assemblies 20 are configured to block the corresponding slots 11, achieving Y-axis protection of the mechanical system under positive pressure. The two sets of cantilever sleeve assemblies 30 are slidably connected to the slides 1 and guide grooves 2 at the corresponding slots 11 and can slide along them. At the same time, the corresponding winding assemblies 20 perform corresponding winding actions to adapt to the movement conditions of the powder suction and powder distribution. The two cantilever sleeve assemblies 30 are also configured to achieve X-axis protection of the mechanical system. The above structure of the present invention is not only simple but also basically seamless, effectively blocking powder and dust, and has a good sealing effect, thus making it suitable for use in metal 3D printers.

[0024] As one possible implementation method, such as Figure 6 As shown, see also Figures 3-5 , Figures 7-10 Each winding assembly 20 includes: a first drum 21 and a second drum 22, two spools 23, two spool seats 24, a steel belt 25, two sets of stationary pulley assemblies 26, and two steel cables 27. For example... Figure 6 As shown, the first roll 21 and the second roll 22 are disposed at both ends of the corresponding slot 11. Figure 4 As shown, see also Figure 5 The two reels 23 pass through the first reel 21 and the second reel 22 respectively. For example... Figure 9 As shown, see also Figure 10 Each spool 23 is fitted with a bearing 3 between itself and its corresponding drum. Specifically, two bearings 3 may be fitted between each spool 23 and its corresponding drum. Figure 6 As shown, two spool supports 24 are correspondingly disposed on one side of the first drum 21 and the second drum 22 to support the corresponding spools 23. A steel strip 25 is wound around the first drum 21 and the second drum 22. Figure 6 As shown, see also Figure 9 and Figure 10 Two sets of stationary pulley assemblies 26 are respectively arranged on the side of the first drum 21 and the second drum 22 near the shaft seat 24. For example... Figure 9 As shown, each set of stationary pulley assemblies 26 includes a stationary pulley 261 and a stationary pulley bearing 262, wherein the number of stationary pulley bearings 262 is two, arranged in a nested configuration. Figure 6 As shown, see also Figure 4 and Figure 5One end of one of the two steel cables 27 is fixed to the corresponding cantilever sleeve assembly 30, and the other end of the steel cable 27 is connected to the first drum 21 via a stationary pulley 261 at the second drum 22. The other steel cable 27 is also fixed to the corresponding cantilever sleeve assembly 30, and the other end of the steel cable 27 is connected to the second drum 22 via a stationary pulley 261 at the first drum 21. The steel strip 25 and steel cable 27 at the same drum in the first drum 21 and second drum 22 are configured such that the steel cable 27 winds up when the steel strip 25 is released, or winds up when the steel strip 25 is wound. Each winding assembly 20 is also configured such that the steel strip 25 at the first drum 21 is released and the steel strip 25 at the second drum 22 is wound up, or the steel strip 25 at the first drum 21 is wound up and the steel strip 25 at the second drum 22 is released. Figure 3 As shown, under positive pressure, the steel strip 25 of each winding assembly 20 is always attached to the forming chamber partition 10, thereby blocking the corresponding slot 11 and achieving Y-direction sealing protection of the mechanical system.

[0025] like Figure 1 As shown, see also Figure 3 , Figure 6 Taking the cantilever of the powder suction device as an example, the cantilever sleeve assembly 30 above the protective device 100 provides sealing protection for the cantilever in the X-direction. When the cantilever moves to the right, the cantilever sleeve assembly 30 slides to the right along the slide rail 1 and guide groove 2. At this time, the steel strip 25 at the first drum 21 is released, and the steel cable 27 at the first drum 21 is wound, driving the steel strip 25 at the second drum 22 to be wound, and the steel cable 27 at the second drum 22 is released. When the cantilever moves to the left, the above components move in the opposite direction.

[0026] As one possible implementation method, such as Figure 12 As shown, see also Figure 13 Each of the first drum 21 and the second drum 22 includes, according to function, a cable drum section 211 for winding the cable 27 and a strip drum section 212 for winding the strip 25 (see [link]). Figure 6 ).like Figure 13 As shown, the outer wall of the steel strip drum 212 is provided with a groove 213 for installing the pressure plate 5 (see Figure 213). Figure 12 ), to fix the steel strip 25.

[0027] As one possible implementation method, such as Figure 7 As shown, see also Figure 8 In the two sets of take-up assemblies 20, the two first drums 21 share one of the two spools 23. For example... Figure 6 As shown, see also Figures 7-8 The two second drums 22 in the two sets of take-up assemblies 20 share another spool 23 of the two spools 23. For example... Figure 11 As shown, the reel 23 is constructed as an integral steel strip reel and steel cable reel.

[0028] As one possible implementation method, such as Figure 4 As shown, each winding assembly 20 also includes two sets of tensioning assemblies 28 arranged in opposite directions, such as... Figure 14 As shown, the two sets of tensioning components 28 are installed at the cantilever sleeve 31 of the corresponding cantilever sleeve assembly 30 via steel cable fixing plates 4, as follows. Figure 14 As shown, the two sets of tensioning components 28 correspond one-to-one with the two steel cables 27, and each set of tensioning components 28 is configured to tension and fix the corresponding steel cable 27.

[0029] As one possible implementation method, such as Figure 15 As shown, see also Figure 14 , 16 Each tensioning assembly 28 includes a tension spring 281 (see [link]). Figure 16 ) and spring sleeve 282. For example Figure 16 As shown, the tension spring 281 is installed and fixed at the end of the steel cable 27, as... Figure 14 and Figure 15 As shown, tension spring 281 (see Figure 16 The steel cable 27 extends into the spring sleeve 282, which provides motion guidance for the tension spring 281.

[0030] As one possible implementation method, such as Figure 8 As shown, Figure 8 The middle section is a schematic diagram showing the installation of guide plates 29 at the two first reels 21. See also... Figure 8 The two sets of winding assemblies 20 also include two guide plates 29, which are respectively disposed between the two first drums 21 and the two second drums 22 of the two sets of winding assemblies 20. The two guide plates 29 are fixedly connected to the corresponding spindle seats 24, and the guide plates 29 are used to adjust the winding gap of the corresponding steel strips 25.

[0031] As one possible implementation method, such as Figure 6 As shown, each cantilever sleeve assembly 30 includes a cantilever sleeve 31, a sealing plate 32, and a sealing plate baffle 33. The sealing plate 32 is fixed to the inner peripheral wall of the cantilever sleeve 31 by the sealing plate baffle 33, and the sealing plate 32 is used to achieve X-direction sealing protection for the corresponding mechanical system. Specifically, the sealing plate 32 can be a felt board, preferably an asbestos felt board.

[0032] As one possible implementation method, such as Figure 1As shown, each cantilever sleeve assembly 30 also includes a cantilever sleeve fixing plate 34, which is installed at the corresponding cantilever sleeve 31.

[0033] See Figures 1-16 The present invention also provides a metal 3D printer, which includes a protective device 100 for the above-mentioned powder suction and powder distribution mechanical system.

[0034] The metal 3D printer of the present invention includes a protective device 100 for the powder suction and powder distribution mechanical systems. The protective device 100 includes a forming chamber partition 10, two sets of winding assemblies 20, and two sets of cantilever sleeve assemblies 30. The forming chamber partition 10 serves as a mounting base. The two sets of winding assemblies 20 are configured to block corresponding slots 11 to achieve Y-axis protection of the mechanical system. The two sets of cantilever sleeve assemblies 30 are slidably connected to and can slide along the slide rails 1 and guide grooves 2 at the corresponding slots 11. Simultaneously, the corresponding winding assemblies 20 perform corresponding winding actions to adapt to the movement conditions of the powder suction and powder distribution systems. The two cantilever sleeve assemblies 30 are also configured to achieve X-axis protection of the mechanical system. The above-mentioned structure of the present invention is not only simple but also essentially seamless, effectively blocking powder and dust, providing a good sealing effect, and thus suitable for use in metal 3D printers.

[0035] The technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A protective device for a powder suction device and a powder distributor mechanical system, characterized in that... The protective device includes: The forming chamber partition has two slots arranged side by side along its length. Each slot has a slide rail on one side and a guide groove on the other side. The forming chamber partition serves as an installation base. Two sets of winding assemblies are correspondingly disposed at the ends of the two slots, and the two sets of winding assemblies are symmetrically arranged with respect to the axis of the forming chamber partition. The two sets of winding assemblies are configured to block the corresponding slots to achieve Y-axis protection of the mechanical system; and Two sets of cantilever sleeve assemblies correspond one-to-one with the two sets of winding assemblies. Each set of cantilever sleeve assemblies is fixedly connected to the corresponding winding assembly, and each set of cantilever sleeve assemblies is slidably connected to the slide rail and guide groove at the corresponding slot and can slide along them. At the same time, the corresponding winding assembly performs the corresponding winding action. The two cantilever sleeve assemblies are configured to pass through the corresponding powder suction cantilever and powder distributor cantilever. The two cantilever sleeve assemblies are also configured to provide X-axis protection for the mechanical system. Wherein, the length direction of the forming chamber partition is the Y direction, and the direction perpendicular to the Y direction is the X direction.

2. The protective device for the powder suction device and powder distributor mechanical system according to claim 1, characterized in that... Each take-up assembly includes: The first and second reels are positioned at opposite ends of the corresponding slots; Two spools pass through the first and second drums respectively, and a bearing is installed between each spool and its corresponding drum. Two spool supports are respectively disposed on one side of the first spool and the second spool, for supporting the corresponding spools; A steel strip, wound on the first and second drums; Two sets of stationary pulley assemblies are respectively arranged on the side of the first drum and the second drum near the shaft seat. Each set of stationary pulley assemblies includes a stationary pulley and a stationary pulley bearing. Two steel cables are used. One end of one cable is fixed to the corresponding cantilever sleeve assembly, and the other end of the cable is connected to the first drum via a stationary pulley at the second drum. The other cable is fixed to the corresponding cantilever sleeve assembly, and the other end of the cable is connected to the second drum via a stationary pulley at the first drum. Wherein, the steel strip and steel cable at the same drum in the first drum and the second drum are configured such that the steel cable is wound when the steel strip is released, or the steel cable is released when the steel strip is wound. Each set of winding assemblies is also configured such that the steel strip at the first drum is released and the steel strip at the second drum is wound, or the steel strip at the first drum is wound and the steel strip at the second drum is released.

3. The protective device for the mechanical system of the powder suction device and powder distributor according to claim 2, characterized in that... Each of the first and second reels includes a cable reel section and a strip reel section, which are functionally divided into a cable reel section and a strip reel section. The cable reel section is used to wind the cable, and the strip reel section is used to wind the strip. The outer wall of the strip reel section is provided with a groove for installing a pressure plate to fix the strip.

4. The protective device for the powder suction device and powder distributor mechanical system according to claim 2, characterized in that... The two first drums in the two sets of winding assemblies share one of the two spools, and the two second drums in the two sets of winding assemblies share the other of the two spools.

5. The protective device for the mechanical system of the powder suction device and powder distributor according to claim 2, characterized in that... Each winding assembly further includes two sets of tensioning assemblies arranged in opposite directions. The two sets of tensioning assemblies are installed on the corresponding cantilever sleeve assembly through steel cable fixing plates. The two sets of tensioning assemblies correspond one-to-one with the two steel cables. Each set of tensioning assemblies is configured to tension and fix the corresponding steel cable.

6. The protective device for the mechanical system of the powder suction device and powder distributor according to claim 5, characterized in that... Each tensioning assembly includes a tension spring and a spring sleeve. The tension spring is installed and fixed at the end of the steel cable. The tension spring and the steel cable extend into the spring sleeve, and the spring sleeve provides motion guidance for the tension spring.

7. The protective device for the powder suction device and powder distributor mechanical system according to claim 2, characterized in that... The two sets of winding assemblies also include two guide plates, which are respectively disposed between the two first drums and the two second drums of the two sets of winding assemblies. The two guide plates are fixedly connected to the corresponding reel seats, and the guide plates are used to adjust the winding gap of the corresponding steel strip.

8. The protective device for the mechanical system of the powder suction device and powder distributor according to any one of claims 1-7, characterized in that... Each cantilever sleeve assembly includes a cantilever sleeve, a sealing plate, and a sealing plate baffle. The sealing plate is fixed to the inner circumferential wall of the cantilever sleeve by means of the sealing plate baffle. The sealing plate is used to achieve X-axis protection of the corresponding mechanical system.

9. The protective device for the powder suction device and powder distributor mechanical system according to claim 8, characterized in that... Each cantilever sleeve assembly further includes a cantilever sleeve fixing plate, which is installed at the corresponding cantilever sleeve.

10. A metal 3D printer, characterized in that... The metal 3D printer includes a protective device for the powder suction and powder distribution mechanical system as described in any one of claims 1-9.

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