Lifting assembly and 3D printing device

Abstract

The utility model provides a lifting assembly and a 3D printing device, and belongs to the technical field of 3D printing equipment.The lifting assembly comprises a supporting table, a connecting arm, a first driving part, a lifting plate and a second driving part, the connecting arm is slidably installed on the supporting table, the driving end of the first driving part is connected with the connecting arm, the first driving part is used for driving the connecting arm to ascend and descend, and the second driving part is used for driving the lifting plate to ascend and descend; the lifting plate is rotationally mounted on the connecting arm, the driving end of the second driving part is connected with the lifting plate, and the second driving part is used for driving the lifting plate to rotate; the lifting plate can ascend and descend along with the connecting arm, so that the three-dimensional entity is driven to ascend, after the three-dimensional entity ascends to a certain height, the three-dimensional entity can be driven to turn over under the action of the second driving piece, the three-dimensional entity is in an inclined state, resin drips more easily under the action of gravity, and the service life of the three-dimensional entity is prolonged. And the three-dimensional entity is convenient to observe and is more convenient to cut off.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, and in particular to a lifting component and a 3D printing device. Background Art

[0002] As a surface forming 3D printer, DLP-3D printer has rapidly occupied the industry market with its advantages such as fast manufacturing speed, good surface quality of prototype manufacturing, and high dimensional accuracy, such as conceptual design communication, single-piece small batch precision manufacturing, product models, aerospace, jewelry, and medical industries.

[0003] The DLP device contains a liquid tank that can hold resin, which is used to hold resin that can be cured after being irradiated with ultraviolet light of a specific wavelength. The DLP imaging system is placed under the liquid tank, and its imaging surface is located exactly at the bottom of the liquid tank. Through energy and graphic control, a thin layer of resin with a certain thickness and shape can be cured each time (this layer of resin is exactly the same as the cross-sectional shape obtained by the previous cutting). A lifting mechanism is set above the liquid tank. After each cross-sectional exposure is completed, it is pulled up to a certain height (this height is consistent with the layer thickness), so that the currently cured solid resin is separated from the bottom of the liquid tank and adhered to the lifting plate or the last formed resin layer. In this way, a three-dimensional entity is generated by exposing and lifting layer by layer.

[0004] After the three-dimensional entity is produced, it needs to be cut off from the lifting plate. Since the lifting plate is in a horizontal state at this time, the resin is not easy to drip and will remain on the three-dimensional entity, and it is not easy to observe, so it is inconvenient to cut off the three-dimensional entity. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the lifting plate is in a horizontal state, the resin is not easy to drip and will remain on the three-dimensional entity, and it is difficult to observe, and it is inconvenient to cut off the three-dimensional entity, thereby providing a lifting component and a 3D printing device.

[0006] In order to solve the above technical problems, the utility model provides a lifting assembly, including: a support platform;

[0007] A connecting arm, slidably mounted on the support platform;

[0008] A first driving member, a driving end of which is connected to the connecting arm, and the first driving member is used to drive the connecting arm to move up and down;

[0009] A lifting plate, rotatably mounted on the connecting arm;

[0010] A second driving member, whose driving end is connected to the lifting plate, is used to drive the lifting plate to rotate so that the lifting plate changes from a horizontal state to an inclined state, thereby facilitating cutting of the three-dimensional solid on the lifting plate.

[0011] Optionally, the top of the support platform has a horizontal plate, the second driving member is a pin mounted on the horizontal plate, the pin extends downward, the lifting plate is rotatably mounted on the connecting arm through a clamping block, and the pin is suitable for abutting against the clamping block to push the lifting plate to rotate.

[0012] Optionally, the ejector pin is arranged at a middle position of the transverse plate, and the connecting arm has a avoidance hole for passing the ejector pin, and the ejector pin abuts against a middle position of the block close to the support platform after passing through the avoidance hole.

[0013] Optionally, it further includes: a fixing member connected between the clamping block and the connecting arm, and the clamping block separated from the ejector pin is fixed by the fixing member to keep the lifting plate in a horizontal state.

[0014] Optionally, the fixing member comprises a rotating shaft rotatably mounted on the connecting arm, and the rotating shaft has a cam structure that is engaged with one end of the clamping block.

[0015] Optionally, it also includes: a support arm, the inner wall of the support platform has a vertically arranged slide groove, a bearing is slidably arranged in the slide groove, one end of the support arm is rotatably connected to the bearing, and the other end of the support arm is connected to the rotating shaft.

[0016] Optionally, the first driving member is a motor, and the first driving member is connected to the connecting arm via a transmission assembly.

[0017] Optionally, the transmission assembly comprises: a screw rod mounted on a driving end of the first driving member;

[0018] A connecting block is installed on the connecting arm. The connecting block is threadedly connected to the screw rod. The connecting arm is driven to move up and down by the rotation of the screw rod.

[0019] Optionally, the top of the connecting arm has a handle for easy holding.

[0020] A 3D printing device, comprising: a frame and a lifting assembly according to any one of the above schemes, wherein a support platform of the lifting assembly is installed on the top of the frame;

[0021] A resin tank is installed on the top of the frame, and the resin tank is located directly below the lifting plate of the lifting assembly;

[0022] An imaging system is installed at the bottom of the frame, and the imaging system is located directly below the resin tank.

[0023] The technical solution of the utility model has the following advantages:

[0024] 1. The lifting assembly provided by the utility model has a lifting plate that can be raised and lowered along with the connecting arm, thereby driving the three-dimensional entity to rise. When it rises to a certain height, the three-dimensional entity can be turned over under the action of the second driving member, so that the three-dimensional entity is in an inclined state. The resin is more likely to drip under the action of gravity, and the three-dimensional entity is convenient for observation and removal.

[0025] 2. The lifting assembly provided by the utility model can push the lifting plate to flip through the ejector pin without using other power sources, which can reduce energy consumption in the production process and thus reduce production costs, and has high economic benefits.

[0026] 3. The lifting assembly provided by the utility model sets the ejector pin in the middle position of the horizontal plate. When the ejector pin pushes the lifting plate to flip, the force on the lifting plate is balanced, which not only reduces the number of ejector pins used but also improves the overall stability.

[0027] 4. The 3D printing device provided by the utility model can turn over the three-dimensional entity after production is completed, and the residual resin is more likely to drip into the resin tank. Moreover, after the three-dimensional entity is turned over, the workpiece is easier to cut off, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a front view of the 3D printing device provided in the first embodiment of the utility model;

[0030] Figure 2 for Figure 1 A magnified view of the middle support platform;

[0031] Figure 3 for Figure 2 A cross-sectional view of

[0032] Figure 4 for Figure 3 A front view of

[0033] Figure 5 for Figure 2 Schematic diagram of the middle lifting plate in an inclined state;

[0034] Figure 6 for Figure 5 A cross-sectional view of

[0035] Figure 7 for Figure 6 A front view of

[0036] Figure 8 for Figure 7 Rear view of.

[0037] Description of reference numerals:

[0038] 1. Support platform; 2. Connecting arm; 3. Lifting plate; 4. Horizontal plate; 5. Ejector pin; 6. Avoidance hole; 7. Rotating shaft; 8. Cam structure; 9. Block; 10. Support arm; 11. Slide groove; 12. Bearing; 13. Motor; 14. Transmission assembly; 15. Screw; 16. Connecting block; 17. Handle; 18. Frame; 19. Resin tank; 20. Imaging system. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] like Figure 2As shown, a specific implementation of the lifting assembly provided in this embodiment includes: a support platform 1, a connecting arm 2, a first driving member, a lifting plate 3 and a second driving member. The connecting arm 2 is slidably installed on the support platform 1, the driving end of the first driving member is connected to the connecting arm 2, the first driving member is used to drive the connecting arm 2 to move up and down, the lifting plate 3 is rotatably installed on the connecting arm 2, the driving end of the second driving member is connected to the lifting plate 3, the second driving member is used to drive the lifting plate 3 to rotate, so that the lifting plate 3 is changed from a horizontal state to an inclined state, so as to facilitate the cutting of the three-dimensional entity on the lifting plate 3, and two guide rails are vertically arranged on the support platform 1, and the connecting arm 2 is installed on the guide rails.

[0044] The lifting assembly provided in this embodiment has a lifting plate 3 that can be raised and lowered along with the connecting arm 2, thereby driving the three-dimensional entity to rise. When it rises to a certain height, the three-dimensional entity can be turned over under the action of the second driving member, so that the three-dimensional entity is in an inclined state. The resin is more likely to drip under the action of gravity, and the three-dimensional entity is convenient for observation and removal.

[0045] like Figures 2 to 4 As shown, in the lifting assembly provided in this embodiment, the top of the support platform 1 has a horizontal plate 4, and the second driving member is a pin 5 installed on the horizontal plate 4, the pin 5 extends downward, and the lifting plate 3 is installed on the connecting arm 2 through a clamping block 9, the clamping block 9 is fixedly connected to the lifting plate 3 through two sheet bodies, and a round shaft is passed through the middle of the clamping block 9, and the two ends of the round shaft are respectively clamped with the connecting arm 2, so that the rotation installation of the clamping block 9 can be realized, and then the rotation installation of the lifting plate 3 is completed, and the pin 5 is suitable for abutting against the clamping block 9 to push the lifting plate 3 to rotate, and the lifting plate 3 can be pushed to flip by the pin 5, without using other power sources, which can reduce energy consumption in the production process, thereby reducing production costs, and has high economic benefits. In addition, as a replaceable embodiment, the second driving member can also be a magnet installed on the horizontal plate 4, and the corresponding clamping block 9 is made of magnetic material. After the clamping block 9 approaches the magnet, it drives the lifting plate 3 to flip under the action of the repulsive force.

[0046] like Figures 2 to 6 As shown, in the lifting assembly provided by this embodiment, the ejector pin 5 is arranged in the middle position of the horizontal plate 4, and the connecting arm 2 has a position avoidance hole 6 for passing the ejector pin 5. After the ejector pin 5 passes through the position avoidance hole 6, it abuts against the middle position of the block 9 close to the support platform 1. There is only one ejector pin 5, and the ejector pin 5 is arranged in the middle position of the horizontal plate 4. When the ejector pin 5 pushes the lifting plate 3 to flip, the lifting plate 3 is balanced in force, which reduces the number of ejector pins 5 used and improves the overall stability. In addition, as an alternative embodiment, the ejector pins 5 can also be symmetrically arranged on both sides of the horizontal plate 4. The number of ejector pins 5 is two, and the number of corresponding position avoidance holes 6 is also two. The number of ejector pins 5 is more, the contact points are more, and the connection is more stable.

[0047] like Figures 3 to 7 As shown, the lifting assembly provided in this embodiment also includes: a fixing member connected between the block 9 and the connecting arm 2, through which the block 9 separated from the ejector pin 5 is fixed to keep the lifting plate 3 in a horizontal state. When the ejector pin 5 is separated from the block 9, the block 9 is in a state of free rotation, and the fixing member can fix the block 9 in this state to prevent the lifting plate 3 from shaking and improve stability. In addition, as an alternative embodiment, the fixing member can be omitted, so that the circular shaft passing through the block 9 is installed on the connecting arm 2 through a torsion spring. When the block 9 is separated from the ejector pin 5, the elastic force of the torsion spring itself can keep the lifting plate 3 in a horizontal state.

[0048] like Figures 3 to 8 As shown, in the lifting assembly provided in this embodiment, the fixing member includes a rotating shaft 7 rotatably mounted on the connecting arm 2, and the rotating shaft 7 has a cam structure 8 that is engaged with one end of the clamping block 9. When the raised portion of the cam structure 8 rotates to the bottom of one end of the clamping block 9, the clamping block 9 can be fixed. When the raised portion rotates to the other side, the clamping block 9 is in a free state and can be turned over under the drive of the ejector 5. In addition, as an alternative embodiment, the fixing member can also be a spring arranged between the connecting arm 2 and the clamping block 9, and the clamping block 9 is fixed by the tension of the spring.

[0049] like Figures 3 to 8 As shown, the lifting assembly provided in this embodiment also includes: a support arm 10, the inner wall of the support platform 1 has a vertically arranged slide 11, the slide 11 has a first section, a second section and a third section, the first section and the third section are arranged in parallel, the third section is located above the first section, and the second section is obliquely connected between the first section and the third section, and a bearing 12 is slidably arranged in the slide 11, one end of the support arm 10 is rotatably connected to the bearing 12, and the other end of the support arm 10 is connected to the rotating shaft 7. As the bearing 12 switches between the first section and the third section, the angle of the support arm 10 can be changed, thereby driving the rotating shaft 7 to rotate, so that the raised part of the cam structure 8 on the rotating shaft 7 fixes the block 9. In addition, as an alternative embodiment, the support arm 10 can also be omitted, and the rotating shaft 7 is driven to rotate by electronic control. The driving source can be a cylinder, a hydraulic cylinder, an electric push rod, etc., and the driving end can be connected to the rotating shaft 7 through a rack and pinion structure, or the driving source is selected as a motor, and the driving end can be directly connected to the rotating shaft 7 through a reducer.

[0050] like Figure 2 , Figure 3As shown, in the lifting assembly provided in this embodiment, the first driving member is a motor 13, which is connected to the connecting arm 2 through a transmission assembly 14, and the connecting arm 2 can be driven to move up and down by the motor 13. In addition, as an alternative embodiment, the first driving member can also be a cylinder, a hydraulic cylinder or an electric push rod, and the driving end can be directly connected to the connecting arm 2.

[0051] like Figure 2 , Figure 3 As shown, in the lifting assembly provided in this embodiment, the transmission assembly 14 includes: a screw rod 15, which is installed at the driving end of the first driving member;

[0052] The connecting block 16 is mounted on the connecting arm 2, and the connecting block 16 is threadedly connected to the screw rod 15. The connecting arm 2 is driven to move up and down by the rotation of the screw rod 15. The cooperation between the screw rod 15 and the connecting block 16 is self-locking, which is more convenient to use. In addition, as an alternative embodiment, the transmission assembly 14 can also be a gear rack, the rack is mounted on the connecting arm 2, and the gear is mounted on the driving end of the motor 13. The connecting arm 2 is driven to move up and down by the meshing of the gear rack.

[0053] like Figure 2 As shown, in the lifting assembly provided in this embodiment, the top of the connecting arm 2 has a handle 17 for easy holding, and the middle of the handle 17 has a hollow portion, into which a human hand can be inserted, so as to facilitate the installation of the clamping block 9 and the lifting plate 3.

[0054] In addition, if Figure 1 As shown, this embodiment also provides a 3D printing device, including: a frame 18 and the lifting assembly, resin tank 19 and imaging system 20 described in the above scheme, the support table 1 of the lifting assembly is installed on the top of the frame 18, the resin tank 19 is installed on the top of the frame 18 and is located directly below the lifting plate 3 of the lifting assembly, the imaging system 20 is installed at the bottom of the frame 18 and is located directly below the resin tank 19, the three-dimensional entity can be flipped after production is completed, the residual resin is more likely to drip into the resin tank 19, and the workpiece is easier to cut after the three-dimensional entity is flipped, and it is easy to use.

[0055] The working principle of the 3D printing device provided in this embodiment is as follows:

[0056] First, inject resin into the resin tank 19, and then start the imaging system 20. The imaging system 20 exposes and cures the resin layer by layer, and at the same time starts the motor 13. The motor 13 drives the screw rod 15 to rotate. The screw rod 15 is threadedly matched with the connecting block 16 to drive the connecting arm 2 to move upward. The connecting arm 2 drives the lifting plate 3 to move upward through the clamping block 9, thereby driving the three-dimensional entity to move upward. At this time, the bearing 12 is still sliding in the first section of the slide groove 11, and the angle of the support arm 10 has not changed. The raised part of the cam structure 8 is clamped under the clamping block 9.

[0057] When the connecting arm 2 continues to move upward, the bearing 12 passes through the first section through the second section and finally enters the third section. The lateral position of the bearing 12 changes, driving the support arm 10 to rotate. The support arm 10 drives the cam structure 8 on the rotating shaft 7 to rotate, so that the raised part of the cam structure 8 is away from the bottom of the block 9. At the same time, the ejector pin 5 passes through the avoidance hole 6 and abuts against the block 9, driving the block 9 to rotate, so that the lifting plate 3 is inclined. At this time, the three-dimensional solid can be cut.

[0058] During the final reset, that is, the above steps are reversed, the connecting arm 2 moves downward, the block 9 and the ejector pin 5 gradually separate and return to a horizontal state, the bearing 12 re-enters the first section from the third section through the second section, and the raised portion of the cam structure 8 on the rotating shaft 7 is engaged with the bottom of the block 9 to fix the block 9.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A lifting assembly, characterized in that: include: Support platform (1); A connecting arm (2) is slidably mounted on the support platform (1); A first driving member, a driving end of which is connected to the connecting arm (2), and the first driving member is used to drive the connecting arm (2) to move up and down; A lifting plate (3) rotatably mounted on the connecting arm (2); A second driving member, whose driving end is connected to the lifting plate (3), is used to drive the lifting plate (3) to rotate so that the lifting plate (3) changes from a horizontal state to an inclined state, thereby facilitating the cutting of the three-dimensional solid on the lifting plate (3).

2. The lifting assembly according to claim 1, characterized in that: The top of the support platform (1) is provided with a transverse plate (4), and the second driving member is a pin (5) mounted on the transverse plate (4). The pin (5) extends downward, and the lifting plate (3) is rotatably mounted on the connecting arm (2) via a clamping block (9). The pin (5) is suitable for abutting against the clamping block (9) to push the lifting plate (3) to rotate.

3. The lifting assembly according to claim 2, characterized in that: The ejector pin (5) is arranged at a middle position of the transverse plate (4), and the connecting arm (2) has a position avoidance hole (6) for passing the ejector pin (5). After passing through the position avoidance hole (6), the ejector pin (5) abuts against a middle position of the clamping block (9) close to the support platform (1).

4. The lifting assembly according to claim 2, characterized in that: Also includes: A fixing member is connected between the clamping block (9) and the connecting arm (2), and the clamping block (9) is fixed by the fixing member after being separated from the ejector pin (5) so that the lifting plate (3) is kept in a horizontal state.

5. The lifting assembly according to claim 4, characterized in that: The fixing member comprises a rotating shaft (7) rotatably mounted on the connecting arm (2), and the rotating shaft (7) has a cam structure (8) that is engaged with one end of the clamping block (9).

6. The lifting assembly according to claim 5, characterized in that: It also comprises: a support arm (10), the inner wall of the support platform (1) having a vertically arranged slide groove (11), a bearing (12) being slidably arranged in the slide groove (11), one end of the support arm (10) being rotatably connected to the bearing (12), and the other end of the support arm (10) being connected to the rotating shaft (7).

7. The lifting assembly according to any one of claims 1 to 6, characterized in that: The first driving member is a motor (13), and the first driving member is connected to the connecting arm (2) via a transmission assembly (14).

8. The lifting assembly according to claim 7, characterized in that: The transmission assembly (14) comprises: a screw rod (15) mounted on the driving end of the first driving member; A connecting block (16) is mounted on the connecting arm (2); the connecting block (16) is threadedly connected to the screw rod (15); and the connecting arm (2) is driven to move up and down by the rotation of the screw rod (15).

9. The lifting assembly according to any one of claims 1 to 6, characterized in that: The top of the connecting arm (2) is provided with a handle (17) for easy holding.

10. A 3D printing device, characterized in that: include: A frame (18) and a lifting assembly as claimed in any one of claims 1 to 9, wherein the support platform (1) of the lifting assembly is mounted on the top of the frame (18); A resin tank (19) is installed on the top of the frame (18), and the resin tank (19) is located directly below the lifting plate (3) of the lifting assembly; An imaging system (20) is installed at the bottom of the frame (18), and the imaging system (20) is located directly below the resin tank (19).

Images