Double-layer lifting driving device and additive manufacturing equipment

Abstract

The utility model discloses a double-layer lifting driving device which comprises a bottom fixing plate, a lower layer lifting driving mechanism, an upper layer lifting driving mechanism, a heating plate, an elastic floating mechanism, a base plate and a locking and unlocking mechanism. The upper-layer lifting driving mechanism comprises an upper-layer lifting plate and an upper-layer linear motion driving assembly; the lower-layer linear motion driving assembly is installed on the bottom fixing plate and connected with the lower-layer lifting plate. The upper-layer linear motion driving assembly is installed on the lower-layer lifting plate and connected with the upper-layer lifting plate. The heating plate is in elastic floating connection with the upper-layer lifting plate through an elastic floating mechanism. The utility model further discloses additive manufacturing equipment which comprises the double-layer lifting driving device. According to the utility model, the height of equipment can be greatly reduced under the condition that the forming height is not changed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to additive manufacturing technical field, concretely relates to a double -deck lifting drive arrangement and additive manufacturing equipment. BACKGROUND

[0002] The basic process of selective laser sintering process is that the device adds or transports powder into the powder supply box before or during printing, the powder in the powder supply box is sent to the workbench by the powder feeding device, the powder on the workbench is evenly laid on the substrate by the scraper or powder roller, the powder on the cross section profile part of the workpiece on the substrate is sintered by the laser controlled by the galvanometer or preheated for sintering, when a layer of cross section is sintered, the substrate is lowered by a layer of thickness, and the powder feeding, powder laying and laser sintering process are carried out again, the additive manufacturing of the whole workpiece, i.e. 3D printing process, is completed by layer-by-layer sintering and printing.

[0003] The basic structure of the forming cylinder is divided into three parts of cylinder body, piston and piston lifting drive device, wherein the cylinder body part is a through box body spliced by plates or integrally machined, the cylinder body and the piston are combined to form a five-face closed box container, which is the place for storing the printing powder bag during the printing process. The piston is a combination of a support plate that can move up and down in the cylinder body, mainly divided into a substrate, a sealing ring / sealing gasket and a bottom support seat, and a heater is arranged at the bottom of the substrate according to requirements. The piston lifting drive device mainly drives the piston to vertically ascend and descend in the cylinder body, usually using a screw rod and a servo motor. In the design of the forming cylinder, the height of the cylinder body is determined by the forming height. With the increase of the height of the workpiece to be formed, the space height occupied by the cylinder body, the piston and the driving part will also increase by several times, resulting in a substantial increase in the overall height of the equipment. When the overall height of the equipment increases to a certain extent, it will cause inconvenience in equipment arrangement, transportation, operation and transportation, especially for the equipment that needs to be transported by container, which must be transported in a disassembled manner. In addition, the existing cylinder body, piston and heater are usually integrally made, which is inconvenient for powder removal and transportation. Since the powder bag needs to be removed from the cylinder body, long-distance removal of the cylinder body requires disconnecting the heating line, and frequent plugging and unplugging of the heating line will cause problems such as unreliable contact and uneven heating, and the uneven heating of the piston substrate will directly affect the printing quality of the workpiece. UTILITY MODEL CONTENTS

[0004] The utility model discloses a purpose is to overcome prior art's insufficient, provide a double -deck lifting drive arrangement, can guarantee under the condition of forming height invariable, make equipment height greatly reduce, bring the convenience to equipment space arrangement, transfer, control and transportation, and heating plate passes through elastic floating mechanism and base plate elastic floating contact, and contact reliability is high, and the base plate heating can be guaranteed, effectively improve workpiece printing quality.

[0005] The utility model discloses a specific technical scheme as follows:

[0006] A double -deck lifting drive arrangement, including bottom fixed plate, lower layer lifting drive mechanism, upper layer lifting drive mechanism, heating plate, elastic floating mechanism, base plate and locking unlocking mechanism, the lower layer lifting drive mechanism includes lower layer lifting plate and lower layer linear motion drive assembly, the upper layer lifting drive mechanism includes upper layer lifting plate and upper layer linear motion drive assembly;

[0007] The lower layer linear motion drive assembly is installed on the bottom fixed plate, and the lower layer lifting plate is located above the bottom fixed plate, and the lower layer linear motion drive assembly is connected with the lower layer lifting plate, and the lower layer linear motion drive assembly drives the lower layer lifting plate to make lifting motion;

[0008] The upper layer lifting plate is located above the lower layer lifting plate, the upper layer linear motion drive assembly is installed on the lower layer lifting plate, the upper layer linear motion drive assembly is connected with the upper layer lifting plate, and the upper layer linear motion drive assembly drives the upper layer lifting plate to make lifting motion;

[0009] The base plate is located above the upper layer lifting plate, and the base plate is detachably connected with the upper layer lifting plate through the locking unlocking mechanism;The lower surface of the base plate is inwardly provided with a groove, the heating plate is located in the groove, and the heating plate is elastically and floatingly connected with the upper layer lifting plate through the elastic floating mechanism, the heating plate can be up and down floating, and the heating plate is attached to the groove bottom of the base plate groove.

[0010] Further, the lower layer linear motion drive assembly includes a lower layer drive motor, a lower layer ball screw, a lower layer screw nut and a lower layer transmission assembly, the lower layer drive motor is fixedly installed on the bottom fixed plate;The lower layer screw nut is installed on the bottom fixed plate, and the lower layer ball screw is connected with the lower layer screw nut in a matched mode, the upper layer of the lower layer ball screw is connected with the lower layer lifting plate, and the output shaft of the lower layer drive motor is connected with the lower layer screw nut through the lower layer transmission assembly;

[0011] The number of the lower linear motion driving assemblies is two, the number of the upper linear motion driving assembly is one, and the upper linear motion driving assembly is located in the middle of the upper lifting plate and the lower lifting plate, and the two lower linear motion driving assemblies are symmetrically arranged relative to the upper linear motion driving assembly.

[0012] Further, the lower lifting driving mechanism further comprises a lower guide assembly, the lower guide assembly comprises a lower guide sleeve and a lower guide rod, the bottom fixed plate is provided with a number of lower guide holes corresponding to the number of the lower guide assembly, the lower guide sleeve is installed at the lower guide hole, the lower guide rod passes through the lower guide sleeve, and the upper portion of the lower guide rod is connected with the lower lifting plate; the number of the lower guide assembly is multiple.

[0013] Further, the lower transmission assembly comprises a lower driving wheel, a lower synchronous belt and a lower driven wheel, the lower driving wheel is installed on the output shaft of the lower driving motor, the lower driven wheel is provided with a first through hole, the lower ball screw passes through the first through hole, and the lower driven wheel is connected with the lower screw nut; the lower driving wheel is connected with the lower driven wheel through the lower synchronous belt.

[0014] Further, the upper linear motion driving assembly comprises an upper driving motor, an upper ball screw, an upper screw nut and an upper transmission assembly, the upper driving motor is fixedly installed on the lower lifting plate; the upper screw nut is installed on the lower lifting plate, and the upper ball screw is connected with the upper screw nut in a matched mode, the upper portion of the upper ball screw is connected with the upper lifting plate, and the output shaft of the upper driving motor is connected with the upper screw nut through the upper transmission assembly.

[0015] Further, the upper lifting driving mechanism further comprises an upper guide assembly, the upper guide assembly comprises an upper guide sleeve and an upper guide rod, the lower lifting plate is provided with a number of upper guide holes corresponding to the number of the upper guide assembly, the upper guide sleeve is installed at the upper guide hole, the upper guide rod passes through the upper guide sleeve, and the upper portion of the upper guide rod is connected with the upper lifting plate; the number of the upper guide assembly is multiple.

[0016] Further, the upper transmission assembly comprises an upper driving wheel, an upper synchronous belt and an upper driven wheel, the upper driving wheel is installed on the output shaft of the upper driving motor, the upper driven wheel is provided with a second through hole, the upper ball screw passes through the second through hole, and the upper driven wheel is connected with the upper screw nut; the upper driving wheel is connected with the upper driven wheel through the upper synchronous belt.

[0017] Further, the number of the elastic floating mechanism is multiple, the elastic floating mechanism spring and guide shaft, the lower end of the guide shaft is in threaded connection with the upper layer lifting plate, the spring is sleeved on the guide shaft, and the two ends of the spring are respectively abutted against the upper layer lifting plate and the heating plate, the upper end of the guide shaft is in T-shaped structure, the heating plate is provided with a T-shaped groove matched with the T-shaped structure, and the T-shaped structure is installed at the T-shaped groove.

[0018] Further, the number of the locking and unlocking mechanism is multiple, the locking and unlocking mechanism comprises an unlocking seat, a lock tongue and a lock catch assembly, the lock tongue is connected with the base plate, the unlocking seat is connected with the lower layer lifting plate, and the heating plate is provided with an avoiding opening for avoiding the lock tongue and the lock catch assembly;

[0019] The lock catch assembly comprises a seat body, a pull spring and clamping pieces, the seat body is connected with the upper layer lifting plate, the two clamping pieces are cross-rotatably connected, each clamping piece is provided with a pull spring, one end of the clamping piece is connected with the seat body through the pull spring, and the inner side surface of the one end of the clamping piece is provided with an inclined surface structure, so that the one end of the two clamping pieces forms a V-shaped groove, the unlocking seat is provided with a V-shaped structure, and the other end of the clamping piece is inwardly provided with a hook head.

[0020] When the base plate is locked and connected with the upper layer lifting plate, the two hook heads of the other end of the two clamping pieces hook the lock tongue, and the unlocking seat and the lock catch assembly are in a separated state; when the base plate is separated from the upper layer lifting plate, the upper layer lifting plate moves downwards, the V-shaped structure is inserted into the V-shaped groove, the one end of the two clamping pieces is pried open, the other end of the two clamping pieces is opened, and the hook head is separated from the lock tongue along with the continuous downward movement of the upper layer lifting plate.

[0021] An additive manufacturing equipment comprises the double-layer lifting driving device, and the additive manufacturing equipment further comprises a rack, and the bottom fixed plate is connected with the rack.

[0022] The double-layer lifting driving device composed of the upper layer lifting driving mechanism and the lower layer lifting driving mechanism can effectively reduce the height of the cylinder body, thereby greatly reducing the total height of the equipment, and bringing convenience to equipment arrangement, transfer, control and transportation. Meanwhile, the heating plate is in elastic floating contact with the base plate through the elastic floating mechanism, the contact reliability is high, the base plate heating can be guaranteed, and the workpiece printing quality is effectively improved. In addition, the upper layer lifting plate is detachably connected with the base plate through the locking and unlocking mechanism, so that the heating plate and the base plate are separated, the cylinder body manufacturing is simple, and the cost is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 is a perspective view of the present application;

[0025] Figure 2 is a sectional view of Figure 1 ;

[0026] Figure 3 is a sectional view of Figure 2 after the substrate is removed;

[0027] Figure 4 is a perspective view of Figure 1 after the substrate, the locking and unlocking mechanism are removed and turned by a certain angle;

[0028] Figure 5 is a perspective view of the upper part; Figure 1

[0029] Figure 6 is a sectional view of the upper layer lifting plate, the heating plate and the elastic floating mechanism of the present application;

[0030] Figure 7 is a partial enlarged view of the left part; Figure 6

[0031] is a perspective view of the locking and unlocking mechanism of the present application; Figure 8

[0032] Figure 9 is a sectional view of Figure 8 .

[0033] The above-mentioned reference signs:

[0034] ​​1. Bottom fixing plate; 101. Window; 102. Clearance hole; 2. Lower layer lifting drive mechanism; 20. Lower layer lifting plate; 21. Lower layer linear motion drive assembly; 22. Lower layer guide assembly; 210. Lower layer drive motor; 211. Lower layer ball screw; 212. Lower layer screw nut; 213. Lower layer transmission assembly; 220. Lower layer guide rod; 221. Lower layer guide sleeve; 2130. Lower layer drive wheel; 2131. Lower layer synchronous belt; 2132. Lower layer driven wheel; 3. Upper layer lifting drive mechanism; 30. Upper layer lifting plate; 31. Upper layer linear motion drive assembly; 310. Upper layer drive motor; 3 11. Upper ball screw; 312. Upper screw nut; 313. Upper transmission assembly; 32. Upper guide assembly; 320. Upper guide rod; 321. Upper guide sleeve; 301. Clearance opening; 302. Countersunk hole; 4. Locking and unlocking mechanism; 40. Locking tongue; 41. Locking assembly; 42. Unlocking seat; 420. Seat body; 421. Tension spring; 422. Clamping plate; 410. V-shaped structure; 4220. Hook head; 4221. Angled structure; 5. Base plate; 501. Groove; 6. Heating plate; 60. T-slot; 7. Elastic floating mechanism; 70. Guide shaft; 71. Spring; 701. Socket hexagonal hole. Detailed Implementation

[0035] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0036] like Figures 1-9 As shown, this embodiment provides a double-layer lifting drive device, including a bottom fixing plate 1, a lower layer lifting drive mechanism 2, an upper layer lifting drive mechanism 3, a heating plate 6, an elastic floating mechanism 7, a base plate 5, and a locking and unlocking mechanism 4. The lower layer lifting drive mechanism 2 includes a lower layer lifting plate 20 and a lower layer linear motion drive assembly 21, and the upper layer lifting drive mechanism 3 includes an upper layer lifting plate 30 and an upper layer linear motion drive assembly 31.

[0037] The lower linear motion drive assembly 21 is mounted on the bottom fixed plate 1, and the lower lifting plate 20 is located above the bottom fixed plate 1. The lower linear motion drive assembly 21 is connected to the lower lifting plate 20, and the lower linear motion drive assembly 21 drives the lower lifting plate 20 to perform lifting and lowering movements.

[0038] The upper layer lifting plate 30 is located above the lower layer lifting plate 20, the upper layer linear motion driving assembly 31 is installed on the lower layer lifting plate 20, the upper layer linear motion driving assembly 31 is connected with the upper layer lifting plate 30, and the upper layer linear motion driving assembly 31 drives the upper layer lifting plate 30 to move up and down.

[0039] The substrate 5 is located above the upper layer lifting plate 30, and the substrate 5 is detachably connected with the upper layer lifting plate 30 through the locking and unlocking mechanism 4; the lower surface of the substrate 5 is inwardly provided with a groove 501, the heating plate 6 is located in the groove 501, and the heating plate 6 is elastically and floatingly connected with the upper layer lifting plate 30 through the elastic floating mechanism 7, the heating plate 6 can be up and down floating, and the heating plate 6 is attached to the groove bottom of the groove 501 of the substrate 5.

[0040] The double-layer lifting driving device composed of the upper layer lifting driving mechanism 3 and the lower layer lifting driving mechanism 2 can effectively reduce the height of the cylinder body, thereby greatly reducing the total height of the equipment, and bringing convenience for the space arrangement, transfer, control and transportation of the equipment.

[0041] The heating plate 6 of the embodiment is elastically and floatingly contacted with the substrate 5 through the elastic floating mechanism 7, the contact reliability is high, the heating of the substrate 5 can be guaranteed, and the workpiece printing quality is effectively improved. The heating plate 6 in the embodiment includes a plate body and a plurality of heating pipes embedded in the plate body.

[0042] The upper layer lifting plate 30 is detachably connected with the substrate 5 through the locking and unlocking mechanism 4, so as to realize the separation of the heating plate 6 and the substrate 5, the cylinder body manufacturing is simple, the cost is greatly reduced, a plurality of movable cylinder bodies can be equipped for a single equipment, and convenience is provided for the industrialization of the equipment.

[0043] Preferably, the lower layer linear motion driving assembly 21 includes a lower layer driving motor 210, a lower layer ball screw 211, a lower layer screw nut 212 and a lower layer transmission assembly 213, the lower layer driving motor 210 is fixedly installed on the bottom fixed plate 1, the lower layer screw nut 212 is installed on the bottom fixed plate 1, the lower layer ball screw 211 is connected with the lower layer screw nut 212 in a matched mode, the upper portion of the lower layer ball screw 211 is connected with the lower layer lifting plate 20, and the output shaft of the lower layer driving motor 210 is connected with the lower layer screw nut 212 through the lower layer transmission assembly 213.

[0044] When the lower layer linear motion driving assembly 21 drives the lower layer lifting plate 20 to move up and down, the lower layer driving motor 210 drives the lower layer screw nut 212 to rotate through the lower layer transmission assembly 213, the lower layer screw nut 212 drives the lower layer ball screw 211 to move up and down, thereby driving the lower layer lifting plate 20 to move up and down.

[0045] Referring to Figures 1-4 In the embodiment, the number of the lower layer linear motion driving assemblies 21 is two, the number of the upper layer linear motion driving assembly 31 is one, the upper layer linear motion driving assembly 31 is located in the middle of the upper layer lifting plate 30 and the lower layer lifting plate 20, and the two lower layer linear motion driving assemblies 21 are symmetrically arranged relative to the upper layer linear motion driving assembly 31; the middle of the bottom fixed plate 1 is provided with a window 101 for avoiding the upper layer linear motion driving assembly 31.

[0046] In the embodiment, the lower layer lifting driving mechanism 2 further comprises a lower layer guiding assembly 22, the lower layer guiding assembly 22 comprises a lower layer guiding sleeve 221 and a lower layer guiding rod 220, the bottom fixed plate is provided with a lower layer guiding hole corresponding in number and position to the lower layer guiding assembly 22, the lower layer guiding sleeve 221 is installed at the lower layer guiding hole, the lower layer guiding rod 220 passes through the lower layer guiding sleeve 221, and the upper part of the lower layer guiding rod 220 is connected with the lower layer lifting plate 20; the number of the lower layer guiding assembly 22 is multiple, and in the embodiment, the number of the lower layer guiding assembly 22 is four, and the specific number is determined according to the actual situation, which is not limited.

[0047] The lower layer guiding assembly 22 realizes the guiding function when the lower layer linear motion driving assembly 21 drives the lower layer lifting plate 20 to move up and down, and ensures the precision of the up and down movement of the lower layer lifting plate 20.

[0048] Referring to Figure 4As shown, preferably in the embodiment, the lower transmission assembly 213 comprises a lower driving wheel 2130, a lower synchronous belt 2131 and a lower driven wheel 2132, the lower driving wheel 2130 is installed on the output shaft of the lower driving motor 210, the lower driven wheel 2132 is provided with a first through hole, the lower ball screw 211 passes through the first through hole, and the lower driven wheel 2132 is connected with the lower screw nut 212; the lower driving wheel 2130 is connected with the lower driven wheel 2132 through the lower synchronous belt 2131. When the lower driving motor 210 drives the lower screw nut 212 to rotate through the lower transmission assembly 213, the lower driving motor 210 drives the lower driving wheel 2130 to rotate, and the lower driven wheel 2132 is driven to rotate through the lower synchronous belt 2131, and the lower driven wheel 2132 is connected with the lower screw nut 212, so as to synchronously drive the lower screw nut 212 to rotate.

[0049] Preferably in the embodiment, the upper linear motion driving assembly 31 comprises an upper driving motor 310, an upper ball screw 311, an upper screw nut 312 and an upper transmission assembly 313, the upper driving motor 310 is fixedly installed on the lower lifting plate 20; the upper screw nut 312 is installed on the lower lifting plate 20, and the upper ball screw 311 is connected with the upper screw nut 312 in a matched manner, the upper ball screw 311 is connected with the upper lifting plate 30 above, and the output shaft of the upper driving motor 310 is connected with the upper screw nut 312 through the upper transmission assembly 313.

[0050] When the upper linear motion driving assembly 31 drives the upper lifting plate 30 to move up and down, the upper driving motor 310 drives the upper screw nut 312 to rotate through the upper transmission assembly 313, the upper screw nut 312 drives the upper ball screw 311 to move up and down, thereby driving the upper lifting plate 30 to move up and down.

[0051] The upper layer guiding assembly 32 comprises an upper layer guiding sleeve 321 and an upper layer guiding rod 320. The lower layer lifting plate 20 is provided with upper layer guiding holes corresponding in number and position to the upper layer guiding assembly 32. The upper layer guiding sleeve 321 is installed at the upper layer guiding hole. The upper layer guiding rod 320 penetrates through the upper layer guiding sleeve 321, and the upper end of the upper layer guiding rod 320 is connected with the upper layer lifting plate 30. The number of the upper layer guiding assembly 32 is multiple. The bottom fixed plate 1 is provided with avoiding holes 102 for avoiding the upper layer guiding rod 320. The number of the avoiding holes 102 is the same as that of the upper layer guiding assembly 32 and the positions correspond. In the embodiment, the number of the upper layer guiding assembly 32 is four, and the specific number is determined according to the actual situation, which is not limited.

[0052] The upper layer guiding assembly 32 is used to realize the guiding function of the upper layer linear motion driving assembly 31 when driving the upper layer lifting plate 30 to move up and down, so as to ensure the precision of the up and down movement of the upper layer lifting plate 30.

[0053] The upper layer transmission assembly 313 comprises an upper layer driving wheel, an upper layer synchronous belt and an upper layer driven wheel. The upper layer driving wheel is installed on the output shaft of the upper layer driving motor 310. The upper layer driven wheel is provided with a second through hole. The upper layer ball screw 311 penetrates through the second through hole. The upper layer driven wheel is connected with the upper layer screw nut 312. The upper layer driving wheel is connected with the upper layer driven wheel through the upper layer synchronous belt. In the embodiment, the structure and working principle of the upper layer transmission assembly 313 are the same as those of the lower layer transmission assembly 213. Therefore, refer to the specific description of the lower layer transmission assembly 213, which will not be repeated here. Figure 4

[0054] The number of the elastic floating mechanism 7 is multiple. The elastic floating mechanism 7 comprises a spring 71 and a guide shaft 70. The lower end of the guide shaft 70 is threadedly connected with the upper layer lifting plate 30. The spring 71 is sleeved on the guide shaft 70, and the two ends of the spring 71 abut against the upper layer lifting plate 30 and the heating plate 6 respectively. The upper end of the guide shaft 70 is in a T-shaped structure. The heating plate 6 is provided with a T-shaped groove 60 matched with the T-shaped structure. The T-shaped structure is installed at the T-shaped groove 60.

[0055] The upper surface of the upper layer lifting plate 30 is provided with a counterbore 302 for accommodating the spring 71. The spring 71 is located at the counterbore 302.

[0056] The upper end of the guide shaft 70 is provided with an inner hexagonal hole 701, so as to facilitate the assembly and disassembly of the guide shaft 70 through the inner hexagonal hole 701.​

[0057] The embodiment realizes the elastic floating contact of the heating plate 6 and the base plate 5 under the action of the guide shaft 70 and the spring 71, the contact reliability is high, the base plate 5 heating can be guaranteed, and the workpiece printing quality is effectively improved. Therefore, when the base plate 5 is installed on the heating plate 6, the supporting force is provided by the spring 71, and the heating plate 6 is floated up and down to adjust the height position when the pressure is applied.

[0058] The embodiment preferably, the number of the locking and unlocking mechanism 4 is multiple, the locking and unlocking mechanism 4 includes an unlocking seat 42, a lock tongue 40 and a lock catch assembly 41, the lock tongue 40 is connected with the base plate 5, the unlocking seat 42 is connected with the lower lifting plate 20, and the upper lifting plate 30 is provided with a avoiding opening 301 for avoiding the lock tongue 40 and the lock catch assembly 41.

[0059] The lock catch assembly 41 includes a seat body 420, a tension spring 421 and a clamping piece 422, the seat body 420 is connected with the upper lifting plate 30, the two clamping pieces 422 are cross-rotatingly connected, each clamping piece 422 is provided with a tension spring 421, one end of the clamping piece 422 is connected with the seat body 420 through the tension spring 421, and the inner side of one end of the clamping piece 422 is provided with an inclined surface structure 4221, so that one end of the two clamping pieces 422 forms a V-shaped groove, the unlocking seat 42 is provided with a V-shaped structure 410, and the other end of the clamping piece 422 is inwardly provided with a hook head 4220.

[0060] When the base plate 5 is locked and connected with the upper lifting plate 30, the two hook heads 4220 of the other end of the two clamping pieces 422 hook the lock tongue 40, and the unlocking seat 42 is in a separated state from the lock catch assembly 41, as shown in Figure 1 The tension spring 421 makes one end of the two clamping pieces 422 close to each other, so that the other end of the two clamping pieces 422 is close to each other, and under the action of the tension spring 421, the two hook heads 4220 effectively hook the lock tongue 40, and the effective locking of the upper lifting plate 30 and the base plate 5 is guaranteed.

[0061] When the base plate 5 is separated from the upper lifting plate 30, the upper lifting plate 30 moves downward, and the V-shaped structure 410 of the unlocking seat 42 is inserted into the V-shaped groove, as shown in Figure 8 and Figure 9As shown, one end of the two clamping pieces 422 is pushed open, the other end of the two clamping pieces 422 is opened, with the upper lifting plate 30 continuing to move downward, the hook head 4220 is disengaged from the lock tongue 40, so as to complete the connection and separation of the substrate 5 and the upper lifting plate 30, simple and convenient operation, and the locking and unlocking mechanism 4 of the embodiment is small in size and small in space occupation. The number of the locking and unlocking mechanism 4 of the embodiment is at least two, and a plurality of locking and unlocking mechanisms 4 are arranged along the edges of the upper lifting plate 30 and the substrate 5.

[0062] An additive manufacturing equipment comprising the double-layer lifting driving device, the additive manufacturing equipment further comprises a rack, and the bottom fixed plate 1 is connected with the rack. Wherein the bottom fixed plate 1 and the rack can be fixedly connected, or the bottom fixed plate 1 is connected with the rack through a moving platform. Of course, the additive manufacturing equipment further comprises a powder feeding device, a powder laying device, a galvanometer system and other conventional configurations, and details are not described herein.

[0063] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A double-deck lifting drive device, characterized by, The application relates to a heating plate device, which comprises a bottom fixed plate (1), a lower-layer lifting driving mechanism (2), an upper-layer lifting driving mechanism (3), a heating plate (6), an elastic floating mechanism (7), a base plate (5) and a locking and unlocking mechanism (4), wherein the lower-layer lifting driving mechanism (2) comprises a lower-layer lifting plate (20) and a lower-layer linear motion driving assembly (21), the upper-layer lifting driving mechanism (3) comprises an upper-layer lifting plate (30) and an upper-layer linear motion driving assembly (31), the lower-layer linear motion driving assembly (21) is installed on the bottom fixed plate (1), the lower-layer lifting plate (20) is located above the bottom fixed plate (1), the lower-layer linear motion driving assembly (21) is connected with the lower-layer lifting plate (20), and the lower-layer linear motion driving assembly (21) drives the lower-layer lifting plate (20) to perform lifting movement, the upper-layer lifting plate (30) is located above the lower-layer lifting plate (20), the upper-layer linear motion driving assembly (31) is installed on the lower-layer lifting plate (20), the upper-layer linear motion driving assembly (31) is connected with the upper-layer lifting plate (30), and the upper-layer linear motion driving assembly (31) drives the upper-layer lifting plate (30) to perform lifting movement, the base plate (5) is located above the upper-layer lifting plate (30), the base plate (5) is detachably connected with the upper-layer lifting plate (30) through the locking and unlocking mechanism (4), the lower surface of the base plate (5) is inwardly provided with a groove (501), the heating plate (6) is located in the groove (501), the heating plate (6) is elastically and floatingly connected with the upper-layer lifting plate (30) through the elastic floating mechanism (7), the heating plate (6) can be upwardly and downwardly floated, and the heating plate (6) is attached to the groove bottom of the groove (501) of the base plate (5). The lower-layer linear motion driving assembly (21) comprises a lower-layer driving motor (210), a lower-layer ball screw (211), a lower-layer screw nut (212) and a lower-layer transmission assembly (213), the lower-layer driving motor (210) is fixedly installed on the bottom fixed plate (1), the lower-layer screw nut (212) is installed on the bottom fixed plate (1), the lower-layer ball screw (211) is connected with the lower-layer screw nut (212) in a matched mode, the upper portion of the lower-layer ball screw (211) is connected with the lower-layer lifting plate (20), and the output shaft of the lower-layer driving motor (210) is connected with the lower-layer screw nut (212) through the lower-layer transmission assembly (213), the number of the lower-layer linear motion driving assemblies (21) is two, the number of the upper-layer linear motion driving assembly (31) is one, the upper-layer linear motion driving assembly (31) is located in the middle portion of the upper-layer lifting plate (30) and the lower-layer lifting plate (20), and the two lower-layer linear motion driving assemblies (21) are symmetrically arranged relative to the upper-layer linear motion driving assembly (31). ​ ​ 2. The dual-layer lifting drive device according to claim 1, characterized in that, ​ ​ 3. The dual-layer lifting drive device according to claim 2, characterized in that The lower layer lifting driving mechanism (2) further comprises a lower layer guiding assembly (22), the lower layer guiding assembly (22) comprises a lower layer guiding sleeve (221) and a lower layer guiding rod (220), the bottom fixed plate (1) is provided with a lower layer guiding hole corresponding in position and same in number with the lower layer guiding assembly (22), the lower layer guiding sleeve (221) is installed at the lower layer guiding hole, the lower layer guiding rod (220) penetrates through the lower layer guiding sleeve (221), and the upper portion of the lower layer guiding rod (220) is connected with the lower layer lifting plate (20); the number of the lower layer guiding assembly (22) is multiple.

4. The dual-layer lifting drive device according to claim 2, characterized in that, The lower layer transmission assembly (213) comprises a lower layer driving wheel (2130), a lower layer synchronous belt (2131) and a lower layer driven wheel (2132), the lower layer driving wheel (2130) is installed on the output shaft of the lower layer driving motor (210), the lower layer driven wheel (2132) is provided with a first through hole, the lower layer ball screw (211) penetrates through the first through hole, and the lower layer driven wheel (2132) is connected with the lower layer screw nut (212); the lower layer driving wheel (2130) is connected with the lower layer driven wheel (2132) through the lower layer synchronous belt (2131).

5. The dual-layer lifting drive device according to claim 2, wherein The upper layer linear motion driving assembly (31) comprises an upper layer driving motor (310), an upper layer ball screw (311), an upper layer screw nut (312) and an upper layer transmission assembly (313), the upper layer driving motor (310) is fixedly installed on the lower layer lifting plate (20); the upper layer screw nut (312) is installed on the lower layer lifting plate (20), and the upper layer ball screw (311) is connected with the upper layer screw nut (312) in a matched mode, the upper portion of the upper layer ball screw (311) is connected with the upper layer lifting plate (30), and the output shaft of the upper layer driving motor (310) is connected with the upper layer screw nut (312) through the upper layer transmission assembly (313).

6. The dual-stage lifting drive of claim 5, wherein, The upper layer lifting driving mechanism (3) further comprises an upper layer guiding assembly (32), the upper layer guiding assembly (32) comprises an upper layer guiding sleeve (321) and an upper layer guiding rod (320), the lower layer lifting plate (20) is provided with an upper layer guiding hole corresponding in position and same in number with the upper layer guiding assembly (32), the upper layer guiding sleeve (321) is installed at the upper layer guiding hole, the upper layer guiding rod (320) penetrates through the upper layer guiding sleeve (321), and the upper portion of the upper layer guiding rod (320) is connected with the upper layer lifting plate (30); the number of the upper layer guiding assembly (32) is multiple.

7. The dual-layer lifting drive device according to claim 5, characterized in that The upper layer transmission assembly (313) comprises an upper layer driving wheel, an upper layer synchronous belt and an upper layer driven wheel, the upper layer driving wheel is installed on the output shaft of the upper layer driving motor (310), the upper layer driven wheel is provided with a second through hole, the upper layer ball screw (311) passes through the second through hole, and the upper layer driven wheel is connected with the upper layer screw nut (312); the upper layer driving wheel is connected with the upper layer driven wheel through the upper layer synchronous belt.

8. The dual-layer lifting drive device according to claim 1, characterized in that, The number of the elastic floating mechanisms (7) is multiple, the elastic floating mechanism (7) comprises a spring (71) and a guide shaft (70), the lower end of the guide shaft (70) is threadedly connected with the upper layer lifting plate (30), the spring (71) is sleeved on the guide shaft (70), and the two ends of the spring (71) abut against the upper layer lifting plate (30) and the heating plate (6) respectively, the upper end of the guide shaft (70) is in a T-shaped structure, the heating plate (6) is provided with a T-shaped groove (60) matched with the T-shaped structure, and the T-shaped structure is installed at the T-shaped groove (60).

9. The dual-layer lifting drive device according to claim 1, characterized in that, The number of the locking and unlocking mechanisms (4) is multiple, the locking and unlocking mechanism (4) comprises an unlocking seat (42), a lock tongue (40) and a lock catch assembly (41), the lock tongue (40) is connected with the base plate (5), and the unlocking seat (42) is connected with the lower layer lifting plate (20); The lock catch assembly (41) comprises a seat body (420), a tension spring (421) and a clamping piece (422), the seat body (420) is connected with the upper layer lifting plate (30), the two clamping pieces (422) are cross-rotatably connected, each clamping piece (422) is provided with the tension spring (421), one end of the clamping piece (422) is connected with the seat body (420) through the tension spring (421), the inner side of one end of the clamping piece (422) is provided with an inclined surface structure (4221), so that one end of the two clamping pieces (422) forms a V-shaped groove, the unlocking seat (42) is provided with a V-shaped structure (410), and the other end of the clamping piece (422) is inwardly provided with a hook head (4220). When the base plate (5) is locked and connected with the upper layer lifting plate (30), the two hook heads (4220) of the other ends of the two clamping pieces (422) hook the lock tongue (40), and the unlocking seat (42) and the lock catch assembly (41) are in a separated state; when the base plate (5) is separated from the upper layer lifting plate (30), the upper layer lifting plate (30) moves downward, the V-shaped structure (410) is inserted into the V-shaped groove, one end of the two clamping pieces (422) is pried open, the other end of the two clamping pieces (422) is opened, and the hook head (4220) is separated from the lock tongue (40) as the upper layer lifting plate (30) continues to move downward.

10. An additive manufacturing apparatus, characterized by The additive manufacturing equipment comprises the double-layer lifting driving device and a rack, and the bottom fixed plate (1) is connected with the rack.

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