Large multipurpose powder cleaning equipment suitable for 3D printing

Abstract

The invention relates to the technical field of 3D printing, and discloses large multipurpose powder cleaning equipment suitable for 3D printing, which comprises two groups of symmetrically arranged equipment support frame bodies, a plurality of groups of equipment host frames arranged above the equipment support frame bodies, and sliding rails fixedly mounted on the front / rear / top three sides of the equipment host frames, the door body is slidably connected to the inner surface of the sliding rail; the oil injection mechanism is used for preventing the joint of the sliding rail and the door body from being abraded. According to the 3D metal printing powder cleaning equipment, the powder cleaning equipment main body and the oil injection mechanism are arranged, so that when 3D metal printing workpieces with different sizes and complex structures are subjected to powder cleaning, the manual operation steps are remarkably reduced through flexible adaptation of the equipment supporting frame body and linkage of the swing mechanism and the air hammer vibrator, the powder cleaning efficiency is improved, and powder residues are reduced; and when the door body slides along the sliding rail, lubricating oil can be automatically injected into the joint of the door body and the sliding rail, so that the powder cleaning requirements of workpieces of multiple specifications are met, and meanwhile the service life of the sliding rail and the door body is prolonged.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more particularly to a large-scale, multi-purpose powder cleaning device suitable for 3D printing. Background Technology

[0002] In recent years, high-efficiency operations have been a topic of continuous exploration and discussion in the manufacturing industry, and the rapid development of the 3D printing industry has injected strong momentum into this topic.

[0003] In 3D metal printing, the printed workpiece needs to be cleaned of powder before subsequent post-processing. In the current technology, for small workpieces, people usually remove the workpiece from the printer cavity and then manually clean the powder. The cleaned powder is generally not recycled. For medium and large workpieces, people have begun to use special powder cleaning equipment for cleaning. With the diversification of 3D printing technology applications and the complexity of part sizes, single-size powder cleaning equipment can no longer meet this diverse needs. Summary of the Invention

[0004] In view of the problems existing in the current large-scale multi-purpose powder cleaning equipment for 3D printing, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a large-scale, multi-purpose powder cleaning device suitable for 3D printing.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a powder cleaning device body; The main body of the powder cleaning equipment includes two sets of symmetrically placed equipment support frames, multiple sets of main equipment frames set above the equipment support frames, slide rails fixedly installed on the front / back / top sides of the main equipment frames, and a door slidably connected to the inner surface of the slide rails. It also includes an oiling mechanism to prevent wear at the connection between the slide rail and the door body; The oil injection mechanism includes a bearing component for providing storage space and delivery channel for lubricating oil, a pumping component for providing power for delivery of the bearing component, and a transmission component that can automatically control the pumping component to provide power to the bearing component when the door is opened. The oil injection mechanism is provided in three sets, and is located on the outside of the three sets of slide rails respectively; The load-bearing component includes an oil storage tank fixedly disposed on the outside of the slide rail, a guide pipe connected to the top of the oil storage tank, a cylinder connected to the top of the guide pipe, and an oil delivery hose connected to the inner cavity of the cylinder and used in conjunction with the slide rail. The outer end of the oil delivery hose is connected to the inner cavity of the slide rail.

[0007] As a preferred embodiment of the large-scale multi-purpose powder cleaning equipment for 3D printing described in this invention, the equipment support frame is equipped with installation and adjustment wedges, and the equipment support frame has bolt pre-tightening notches reserved at the top and bottom. The main frame of the equipment consists of four parts: left / right brackets and upper / lower brackets. The four parts of the main frame of the equipment are welded and locked together with bolts. The main frame of the equipment serves as a workpiece inlet / outlet and rotation mechanism, a sealed chamber, and a load-bearing body for lifting and transporting. An inflatable sealing ring is installed at the connection between the slide rail and the door body, and the door body slides horizontally along the slide rail via a rodless cylinder. The main body of the powder cleaning equipment also includes a rotary mechanism, a sealed chamber and a worktable, which are set inside the main frame of the equipment. The rotary mechanism consists of two parts: X-axis rotation and Z-axis rotation. The power part of both parts is realized through worm gear transmission and planetary reducer. The rotary mechanism realizes X-axis rotation through left and right symmetrical L-arms, and the L-arms are connected to the middle Z-axis rotation support, which together realize 359° rotation in a single direction. The worktable is fixed on the Z-axis rotary support, and an air hammer vibrator is installed on the worktable. The worktable has a substrate fixing hole that is adapted to the size of a universal 3D printing substrate. The sealed chamber adopts a modular installation process. The lower inner liner of the sealed chamber has a customizable structure and is equipped with a powder collection device. The equipment support frame is properly matched with the lower inner liner of the sealed chamber. The equipment support frame can be removed and the structure of the lower inner liner of the sealed chamber can be changed according to the powder collection requirements.

[0008] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the pumping assembly includes a mounting frame fixedly installed on the outer surface of the cylinder, a crossbar rotatably connected to the inner surface of the mounting frame, a crank fixedly sleeved on the outer end face of the crossbar, a drive rod hinged to the outer end face of the crank, a driven rod hinged to the other end of the drive rod, and a piston hinged to the other end of the driven rod. The piston is located inside the cylinder, and the outer surface of the piston is in frictional contact with the inner wall of the cylinder.

[0009] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the pumping assembly further includes a first one-way valve hinged to the bottom of the piston, and a second one-way valve disposed in the inner cavity of the guide tube and used in conjunction with the first one-way valve.

[0010] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the transmission component includes a fixed frame fixedly connected to the outside of the mounting frame, a force-bearing rod slidably connected to the inner surface of the fixed frame and used in conjunction with the door body, and a pin sleeve fixedly connected to the end of the force-bearing rod away from the door body. A cylindrical pin is fixedly connected to the inner surface of the pin sleeve, the pin sleeve is slidably connected to the inner surface of the fixed frame, and a spring is installed at the connection between the pin sleeve and the fixed frame.

[0011] As a preferred embodiment of the large-scale multi-purpose powder cleaning device suitable for 3D printing according to the present invention, the transmission component further includes a rotating shaft rotatably connected to the inner surface of the fixed frame, and an arc groove and a straight groove respectively opened on the two sides of the rotating shaft. The two ends of the arc groove and the straight groove are connected to each other, and the pin of the pin sleeve is initially located inside the arc groove.

[0012] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the transmission assembly further includes a first bevel gear fixedly sleeved on the through end of the rotating shaft, and a second bevel gear meshing with the outer surface of the first bevel gear and used in conjunction with the crossbar. The second bevel gear is fixedly sleeved on the end of the crossbar away from the crank.

[0013] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the oil injection mechanism further includes an adjustment component for controlling the amount of oil delivered by the pumping component in a single operation. The adjustment component is located on the outside of the cylinder.

[0014] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the adjustment component includes a support plate hinged to the outer surface of the cylinder, a threaded rod fixedly installed on the inner surface of the support plate by a bearing, an internal threaded block threaded to the outer surface of the threaded rod, a connecting rod hinged to the outer surface of the internal threaded block and used in conjunction with the crank, and an arc-shaped track fixedly connected to the outer surface of the cylinder and used in conjunction with the internal threaded block. The outer end face of the connecting rod is hinged to the connection between the crank and the drive rod, and the internal thread block is slidably connected to the inner wall of the arc-shaped track.

[0015] As a preferred embodiment of the large-scale multi-purpose powder cleaning device for 3D printing described in this invention, the outer end face of the threaded rod is integrally formed with a star-shaped adjustment knob, and the surface of the star-shaped adjustment knob is provided with anti-slip texture.

[0016] The beneficial effects of this invention are as follows: By setting up a powder cleaning device body and an oil injection mechanism, this invention can not only significantly reduce manual operation steps, improve powder cleaning efficiency, and reduce powder residue when cleaning 3D metal printed workpieces of different sizes and complex structures through the flexible adaptation of the equipment support frame and the linkage of the rotary mechanism and the air hammer vibrator, but also automatically inject lubricating oil into the connection between the two when the door slides along the slide rail. Moreover, the amount of oil injected at one time can be flexibly adjusted to meet the powder cleaning needs of multiple specifications of workpieces while extending the service life of the slide rail and the door. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the device host frame in this invention.

[0019] Figure 3 This is a schematic diagram of the overall structure of the oil injection mechanism in this invention.

[0020] Figure 4 This is a schematic diagram of the internal structure of the load-bearing component in this invention.

[0021] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the local structure at point A in the middle.

[0022] Figure 6 This is a schematic diagram of the overall structure of the piston in this invention.

[0023] Figure 7 This is a schematic diagram of the overall structure of the transmission component in this invention.

[0024] In the diagram: 100, Main body of the cleaning equipment; 110, Equipment support frame; 120, Main frame of the equipment; 130, Slide rail; 140, Door; 200, Oil injection mechanism; 210, Load-bearing component; 211, Oil storage tank; 212, Guide pipe; 213, Cylinder; 214, Oil delivery hose; 220, Pump drive assembly; 221, Mounting bracket; 222, Crossbar; 223, Crank; 224, Drive rod; 225, Driven rod; 226, 227, 228, 229, 220, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 220, 220, 220, 221, 222, 222, 223, 224, 225, 226, 227, 228, 229, 220 ... 6. Piston; 227. First check valve; 228. Second check valve; 230. Transmission assembly; 231. Fixed frame; 232. Force rod; 233. Pin sleeve; 234. Rotating shaft; 235. Arc groove; 236. Straight groove; 237. First bevel gear; 238. Second bevel gear; 240. Adjustment assembly; 241. Support plate; 242. Threaded rod; 243. Internal threaded block; 244. Connecting rod; 245. Arc track. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0029] Example 1 Reference Figures 1-2This is the first embodiment of the present invention, which provides a large-scale multi-purpose powder cleaning device suitable for 3D printing. The device includes a powder cleaning device body 100. The powder cleaning device body 100 includes two sets of symmetrically placed equipment support frames 110, multiple sets of equipment main frame 120 disposed above the equipment support frames 110, slide rails 130 fixedly installed on the front / rear / top sides of the equipment main frame 120, and a door 140 slidably connected to the inner surface of the slide rails 130.

[0030] Specifically, the equipment support frame 110 is equipped with installation and adjustment wedges, and the equipment support frame 110 has bolt pre-tightening notches reserved at the top and bottom. The main equipment frame 120 is composed of four parts: left / right brackets and upper / lower brackets. The four parts of the main equipment frame 120 are welded and machined respectively and locked together with bolts. The main equipment frame 120 is the workpiece entry and exit, rotation mechanism, sealed chamber and load-bearing body for lifting and transportation. An inflatable sealing ring is installed at the connection between the slide rail 130 and the door 140. The door 140 slides horizontally along the slide rail 130 via a rodless cylinder. The main body 100 of the powder cleaning equipment also includes a rotary mechanism, a sealed chamber and a worktable located inside the main frame 120 of the equipment. The rotary mechanism consists of two parts: X-axis rotation and Z-axis rotation. The power of both parts is achieved through worm gear transmission and planetary reducer. The rotary mechanism achieves X-axis rotation through left and right symmetrical L-arms, and the L-arms are connected to the middle Z-axis rotation support, which together achieve 359° rotation in a single direction. The worktable is fixed on the Z-axis rotary support. An air hammer vibrator is installed on the worktable. The worktable has pre-drilled mounting holes for substrates that are compatible with the size of general-purpose 3D printing substrates. The sealed chamber adopts a modular installation process. The lower inner liner of the sealed chamber has a customizable structure and is equipped with a powder collection device. The equipment support frame 110 is properly matched with the lower inner liner of the sealed chamber. The equipment support frame 110 can be removed and the structure of the lower inner liner of the sealed chamber can be changed according to the powder collection requirements.

[0031] It should be noted that the equipment support frame 110 is used to provide basic support for the entire powder cleaning equipment body 100. The installation adjustment wedges equipped on it can quickly align the installation position during equipment hoisting without repeated alignment. The pre-reserved bolt pre-tightening notches at the top and bottom can facilitate the bolt locking with the main frame 120 of the equipment and the ground. At the same time, it can be flexibly adapted according to the powder collection requirements of the inner liner of the sealed chamber. When powder collection is required below the equipment, the equipment support frame 110 is retained. When powder collection is required outside or when powder collection is not required, this component can be removed to adapt to the operation requirements of different workshops. The main frame 120 of the equipment is the core load-bearing body for the workpiece inlet / outlet, rotation mechanism, sealed chamber and lifting and transfer. It is used to provide installation benchmark and structural support for all powder cleaning functional components, and to ensure the overall structural strength of the equipment. The slide rail 130 and the door 140 are respectively fixed to the front, rear and top sides of the main frame 120 of the equipment. The door 140 can slide horizontally along the slide rail 130 through the rodless cylinder. When it is open, it can complete the hoisting of large workpieces into the cavity and hoisting them out after cleaning from multiple directions. After closing, the air-filled sealing ring expands to achieve a seal, preventing metal powder from escaping during the cleaning process and ensuring the sealing environment of the cleaning chamber. The rotary mechanism consists of two parts: X-axis rotation and Z-axis rotation. The power part is driven by worm gear transmission and planetary reducer. The X-axis rotation is achieved by the left and right symmetrical L-arms. The L-arms are connected to the middle Z-axis rotation support. The two work together to achieve 359° rotation in a single direction, which can drive the worktable and workpiece to complete multi-angle rotation, so that the workpiece faces the direction of vibration and powder cleaning without dead angles, thus solving the problem of powder residue on complex structure workpieces. The workbench has pre-drilled mounting holes for 3D printing universal substrates, which can clamp 3D printed workpieces of different sizes and specifications to meet the clamping requirements of large sizes and backward compatibility. The workbench is also equipped with an air hammer vibrator, which can knock the workpiece at high frequency during powder cleaning, causing residual metal powder in the complex internal structure of the workpiece to be dislodged by vibration. Combined with the 359° rotation of the rotary mechanism, it can achieve full-dimensional coverage of vibration powder cleaning.

[0032] When using, First, adapt the main body 100 of the cleaning equipment according to the powder collection needs of the workshop. If powder collection is required below the equipment, retain two sets of symmetrically placed equipment support frames 110. If external powder collection is required or no powder collection is needed, cancel the equipment support frame 110 and change the inner liner structure of the sealed chamber. Then, the installation and adjustment wedges on the equipment support frame 110 are used to complete the overall hoisting and alignment of the equipment. The equipment support frame 110 is locked and fixed to the main equipment frame 120 and the ground through the bolt pre-tightening notches reserved at the top and bottom. Then, the rodless cylinder is activated to drive the door 140 to slide horizontally along the slide rails 130 on the front, back, and top sides of the main frame 120 of the equipment to open, and the 3D metal printed workpiece is hoisted onto the worktable inside the main frame 120 of the equipment. The workpiece is clamped through the base plate fixing holes reserved on the worktable. The rodless cylinder is activated again to drive the door 140 to close, so that the air sealing ring at the connection between the slide rail 130 and the door 140 expands to seal the chamber. Next, the rotary mechanism is started, and the left and right symmetrical L arms are driven by worm gear transmission and planetary reducer to achieve X-axis rotation. In conjunction with the Z-axis rotary support, the worktable is rotated 359° in one direction. At the same time, the air hammer vibrator on the worktable is started to strike the workpiece at high frequency, so that the residual powder on the surface and internal complex structure of the workpiece is shaken off and falls into the powder collection device in the lower inner liner of the sealed chamber. After the powder cleaning is completed, start the rodless cylinder to drive the door 140 to open along the slide rail 130, and then lift out the cleaned workpiece.

[0033] In summary, by setting up the main body 100 of the powder cleaning equipment, it is possible not only to solve the problems of incomplete size coverage, excessive manual operation, low powder cleaning efficiency, and powder residue on complex-structured workpieces when performing powder cleaning operations on 3D metal printed workpieces of different sizes and complex structures, but also to achieve the recycling and reuse of metal powder during the powder cleaning process by means of the flexible adaptation of the equipment support frame 110, the universal base plate fixing holes of the worktable, and the 359° rotation of the rotary mechanism, and the structural design of the air hammer vibrator.

[0034] Example 2 Reference Figure 1 , Figures 3-7 This is the second embodiment of the present invention, which differs from the first embodiment in that: this embodiment provides an oiling mechanism 200 for preventing wear at the connection between the slide rail 130 and the door body 140.

[0035] Furthermore, the oil injection mechanism 200 includes a support component 210 for providing storage space and delivery channel for lubricating oil, a pumping component 220 for providing power for delivery of the support component 210, and a transmission component 230 that can automatically control the pumping component 220 to provide power to the support component 210 when the door 140 is opened. The oil injection mechanism 200 is provided in three sets, and is located on the outside of the three sets of slide rails 130 respectively; The load-bearing component 210 includes an oil storage tank 211 fixedly disposed on the outside of the slide rail 130, a guide pipe 212 connected to the top of the oil storage tank 211, a cylinder 213 connected to the top of the guide pipe 212, and an oil delivery hose 214 connected to the inner cavity of the cylinder 213 and used in conjunction with the slide rail 130. The outer end of the oil delivery hose 214 is connected to the inner cavity of the slide rail 130.

[0036] Among them, the surface of the oil storage tank 211 is equipped with an oil injection valve.

[0037] It should be noted that the oil storage tank 211 is used to provide long-term storage space for lubricating oil, the guide pipe 212 is used to provide directional guidance for lubricating oil from the oil storage tank 211 to the cylinder 213, the cylinder 213 is the pumping working chamber of the pumping assembly 220, and the oil delivery hose 214 is used to directionally deliver the lubricating oil pumped by the pumping assembly 220 to the sliding friction surface of the inner cavity of the slide rail 130 for lubrication and protection.

[0038] The pump assembly 220 includes a mounting bracket 221 fixedly mounted on the outer surface of the cylinder 213, a crossbar 222 rotatably connected to the inner surface of the mounting bracket 221, a crank 223 fixedly sleeved on the outer end face of the crossbar 222, a drive rod 224 hinged to the outer end face of the crank 223, a driven rod 225 hinged to the other end of the drive rod 224, and a piston 226 hinged to the other end of the driven rod 225. The piston 226 is located inside the cylinder 213, and the outer surface of the piston 226 is in frictional contact with the inner wall of the cylinder 213.

[0039] It should also be noted that the mounting bracket 221 is used to provide mounting support for components such as the crossbar 222 and the crank 223. When the crossbar 222 rotates, it can drive the crank 223 to move synchronously. The crank 223 then drives the drive rod 224 to swing back and forth. Through the cooperation of the drive rod 224 and the driven rod 225, the piston 226 is driven to move vertically back and forth along the inner wall of the cylinder 213. When piston 226 moves upward, it creates a negative pressure in the inner cavity of cylinder 213, thereby drawing lubricating oil from oil reservoir 211 into cylinder 213 through guide pipe 212; when piston 226 moves downward, the pressure inside cylinder 213 increases, forcing lubricating oil into the inner cavity of slide rail 130 through oil delivery hose 214. When piston 226 moves upward to draw in oil, the first one-way valve 227 closes and the second one-way valve 228 opens, drawing lubricating oil into cylinder 213; when piston 226 moves downward to deliver pressure, the second one-way valve 228 closes and the first one-way valve 227 opens, pressing lubricating oil from cylinder 213 to oil delivery hose 214 while preventing lubricating oil from flowing back into oil storage tank 211.

[0040] Preferably, the pump assembly 220 further includes a first check valve 227 hinged to the bottom of the piston 226, and a second check valve 228 disposed in the inner cavity of the guide tube 212 and used in conjunction with the first check valve 227.

[0041] It should be noted that the transmission assembly 230 includes a fixed frame 231 fixedly connected to the outside of the mounting bracket 221, a force-bearing rod 232 slidably connected to the inner surface of the fixed frame 231 and used in conjunction with the door body 140, and a pin sleeve 233 fixedly connected to the end of the force-bearing rod 232 away from the door body 140. A cylindrical pin is fixedly connected to the inner surface of the pin sleeve 233. The pin sleeve 233 is slidably connected to the inner surface of the fixed frame 231, and a spring is installed at the connection between the pin sleeve 233 and the fixed frame 231.

[0042] Furthermore, the transmission assembly 230 also includes a rotating shaft 234 rotatably connected to the inner surface of the fixed frame 231, and an arc groove 235 and a straight groove 236 respectively opened on the two sides of the rotating shaft 234. The two ends of the arc groove 235 and the straight groove 236 are connected to each other, and the pin of the pin sleeve 233 is initially located inside the arc groove 235.

[0043] It should be explained that the fixed frame 231 is used to provide installation and movement support for all components of the transmission assembly 230. When the door 140 slides open along the slide rail 130, it can squeeze the force rod 232, causing it to slide within the fixed frame 231. When the door 140 is fully open, the movement of the force rod 232 will reach its maximum stroke simultaneously. When the pin sleeve 233 slides within the fixed frame 231 along with the force-bearing rod 232, it can compress the spring. At the same time, the pin on its inner surface first presses against the arc groove 235, thereby driving the rotating shaft 234 to rotate. After the rotating shaft 234 rotates 360°, the pin on the inner surface of the pin sleeve 233 will move into the straight groove 236. At this time, the pin loses its external force constraint. After the door 140 is closed, the pin sleeve 233 drives the force-bearing rod 232 to reset under the reaction force of the spring. During this process, the rotating shaft 234 does not rotate. The engagement of the first bevel gear 237 and the second bevel gear 238 can reverse the rotational power of the shaft 234 and transmit it to the crossbar 222, thereby driving the crossbar 222 to rotate synchronously and providing pumping power for the pumping assembly 220.

[0044] Furthermore, the transmission assembly 230 also includes a first bevel gear 237 fixedly sleeved on the through end of the rotating shaft 234, and a second bevel gear 238 meshing with the outer surface of the first bevel gear 237 and used in conjunction with the crossbar 222; The second bevel gear 238 is fixedly sleeved on the end of the crossbar 222 away from the crank 223.

[0045] Preferably, the oil injection mechanism 200 also includes an adjustment component 240 for controlling the amount of oil delivered per pumping of the pump actuation component 220; The adjustment component 240 is located on the outside of the cylinder 213.

[0046] The adjustment assembly 240 includes a support plate 241 hinged to the outer surface of the cylinder 213, a threaded rod 242 fixedly mounted to the inner surface of the support plate 241 by a bearing, an internal threaded block 243 threaded to the outer surface of the threaded rod 242, a connecting rod 244 hinged to the outer surface of the internal threaded block 243 and used in conjunction with the crank 223, and an arc-shaped track 245 fixedly connected to the outer surface of the cylinder 213 and used in conjunction with the internal threaded block 243. The outer end face of the connecting rod 244 is hinged to the connection between the crank 223 and the drive rod 224, and the internal thread block 243 is slidably connected to the inner wall of the arc track 245.

[0047] It should be noted that the outer end face of the threaded rod 242 is integrally formed with a star-shaped adjustment knob, and the surface of the star-shaped adjustment knob is provided with anti-slip texture.

[0048] It is worth noting that the threaded rod 242 needs to be lubricated with lubricating oil during use to reduce wear. A flexible rubber protective cover can also be installed on the threaded rod 242 for dust protection.

[0049] It should be explained that the support plate 241 is used to provide rotational support for the threaded rod 242. The operator can manually rotate the star-shaped adjustment knob to drive the threaded rod 242 to rotate. At this time, the internal thread block 243 slides along the inner wall of the arc track 245 as the threaded rod 242 rotates. At the same time, the internal thread block 243 changes the hinge angle between the crank 223 and the drive rod 224 through the connecting rod 244, thereby changing the reciprocating stroke of the piston 226 in the cylinder 213. The larger the stroke of the piston 226, the more oil is pumped at one time, and the smaller the stroke of the piston 226, the less oil is pumped at one time.

[0050] When using, First, lubricating oil is added to the oil storage tank 211 so that the lubricating oil is stored in the oil storage tank 211. Then, according to the sliding friction requirements between the slide rail 130 and the door body 140, the threaded rod 242 is manually rotated to drive the internal threaded block 243 to slide along the arc track 245. The internal threaded block 243 then changes the hinge angle between the crank 223 and the drive rod 224 through the connecting rod 244 to adjust the reciprocating stroke of the piston 226 in the cylinder 213, thereby completing the precise setting of the single oil delivery volume. When the rodless cylinder is activated to drive the door 140 to slide open along the slide rail 130, the door 140 presses the force rod 232 to make it slide within the fixed frame 231, and then the force rod 232 drives the pin sleeve 233 to compress the spring. At the same time, the pin in the sleeve 233 drives the rotating shaft 234 to rotate by pressing the arc groove 235. The rotating shaft 234 drives the second bevel gear 238 to rotate through the first bevel gear 237. The second bevel gear 238 then drives the crossbar 222 to rotate. The crossbar 222 drives the crank 223 to move synchronously through rotation. The crank 223, through the cooperation of the drive rod 224 and the driven rod 225, pushes the piston 226 to perform vertical reciprocating motion along the inner wall of the cylinder 213. When piston 226 moves upward, a negative pressure is formed inside cylinder 213. At this time, the second one-way valve 228 opens and the first one-way valve 227 closes. Lubricating oil is drawn into cylinder 213 from oil tank 211 through guide pipe 212. When piston 226 moves downward, the pressure inside cylinder 213 increases. The second one-way valve 228 closes and the first one-way valve 227 opens. Lubricating oil is forced into oil delivery hose 214 and delivered to the friction surface inside slide rail 130. After the pivot 234 rotates 360°, the pin on the inner surface of the pin sleeve 233 will move into the straight groove 236. At this time, the pin loses its external force constraint. After the door 140 is closed, the pin sleeve 233 drives the force rod 232 to reset under the reaction force of the spring. During this process, the pivot 234 does not rotate.

[0051] In summary, by setting up the oil injection mechanism 200, not only can the lubricating oil in the bearing component 210 be automatically injected into the connection between the slide rail 130 and the door 140 through the cooperation of the transmission component 230 and the pumping component 220 when the door 140 slides along the slide rail 130 to complete the operation of the 3D printed workpiece entering and exiting the powder cleaning equipment, thus avoiding excessive wear of the slide rail 130 and the door 140 due to repeated sliding friction, but also the single oil delivery volume can be flexibly adjusted by the adjustment component 240 to adapt to the lubrication needs under different operating frequencies, so as to achieve the effect of extending the service life of the slide rail 130 and the door 140 without the need for manual oil injection operation.

[0052] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0053] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-scale, multi-purpose powder cleaning device suitable for 3D printing, characterized in that: The equipment includes a main body (100) of a powder cleaning device; the main body (100) of the powder cleaning device includes two sets of symmetrically placed equipment support frames (110), multiple sets of main equipment frames (120) set above the equipment support frames (110), slide rails (130) fixedly installed on the front / rear / top sides of the main equipment frames (120), and a door (140) slidably connected to the inner surface of the slide rails (130); It also includes an oiling mechanism (200) for preventing wear at the connection between the slide rail (130) and the door body (140). The oil injection mechanism (200) includes a bearing assembly (210) for providing storage space and delivery channel for lubricating oil, a pumping assembly (220) for providing power for delivery of the bearing assembly (210), and a transmission assembly (230) that can automatically control the pumping assembly (220) to provide power to the bearing assembly (210) when the door (140) is opened. The oil injection mechanism (200) is provided in three sets, and is located on the outside of the three sets of slide rails (130); The bearing assembly (210) includes an oil storage tank (211) fixedly disposed on the outside of the slide rail (130), a guide pipe (212) connected to the top of the oil storage tank (211), a cylinder (213) connected to the top of the guide pipe (212), and an oil delivery hose (214) connected to the inner cavity of the cylinder (213) and used in conjunction with the slide rail (130). The outer end of the oil delivery hose (214) is connected to the inner cavity of the slide rail (130).

2. The large-scale multi-purpose powder cleaning equipment for 3D printing according to claim 1, characterized in that: The equipment support frame (110) is equipped with installation and adjustment wedges, and the equipment support frame (110) has bolt pre-tightening notches reserved at the top and bottom. The main frame of the equipment (120) is composed of four parts: left / right brackets and upper / lower brackets. The four parts of the main frame of the equipment (120) are welded and processed respectively and locked together with bolts. The main frame of the equipment (120) is the workpiece entry and exit, rotation mechanism, sealed chamber and lifting and transfer carrier. An inflatable sealing ring is installed at the connection between the slide rail (130) and the door body (140), and the door body (140) slides horizontally along the slide rail (130) via a rodless cylinder; The main body (100) of the powder cleaning equipment also includes a rotary mechanism, a sealed chamber and a worktable disposed inside the main frame (120) of the equipment. The rotary mechanism consists of two parts: X-axis rotation and Z-axis rotation. The power part is achieved by worm gear transmission and planetary reducer. The rotary mechanism achieves X-axis rotation through left and right symmetrical L-arms, and the L-arms are connected to the middle Z-axis rotation support, which together achieve 359° rotation in a single direction. The worktable is fixed on the Z-axis rotary support, and an air hammer vibrator is installed on the worktable. The worktable has a substrate fixing hole that is adapted to the size of a universal 3D printing substrate. The sealed chamber adopts a segmented installation process. The lower inner liner of the sealed chamber has a customizable structure and a powder collection device is reserved in the lower inner liner. The equipment support frame (110) is properly matched with the lower inner liner of the sealed chamber. The equipment support frame (110) can be removed and the structure of the lower inner liner of the sealed chamber can be changed according to the powder collection requirements.

3. The large-scale multi-purpose powder cleaning equipment suitable for 3D printing according to claim 2, characterized in that: The pump assembly (220) includes a mounting bracket (221) fixedly mounted on the outer surface of the cylinder (213), a crossbar (222) rotatably connected to the inner surface of the mounting bracket (221), a crank (223) fixedly sleeved on the outer end face of the crossbar (222), a drive rod (224) hinged to the outer end face of the crank (223), a driven rod (225) hinged to the other end of the drive rod (224), and a piston (226) hinged to the other end of the driven rod (225). The piston (226) is located inside the cylinder (213), and the outer surface of the piston (226) is in frictional contact with the inner wall of the cylinder (213).

4. The large-scale multi-purpose powder cleaning equipment suitable for 3D printing according to claim 3, characterized in that: The pump assembly (220) further includes a first check valve (227) hinged to the bottom of the piston (226) and a second check valve (228) disposed in the inner cavity of the guide tube (212) and used in conjunction with the first check valve (227).

5. The large-scale multi-purpose powder cleaning device suitable for 3D printing according to claim 4, characterized in that: The transmission assembly (230) includes a fixed frame (231) fixedly connected to the outside of the mounting bracket (221), a force-bearing rod (232) slidably connected to the inner surface of the fixed frame (231) and used in conjunction with the door body (140), and a pin sleeve (233) fixedly connected to the end of the force-bearing rod (232) away from the door body (140). A cylindrical pin is fixedly connected to the inner surface of the pin sleeve (233), the pin sleeve (233) is slidably connected to the inner surface of the fixed frame (231), and a spring is installed at the connection between the pin sleeve (233) and the fixed frame (231).

6. The large-scale multi-purpose powder cleaning device for 3D printing according to claim 5, characterized in that: The transmission assembly (230) further includes a rotating shaft (234) rotatably connected to the inner surface of the fixed frame (231), and an arc groove (235) and a straight groove (236) respectively opened on the two sides of the rotating shaft (234). The two ends of the arc groove (235) and the straight groove (236) are connected to each other, and the pin of the pin sleeve (233) is initially located inside the arc groove (235).

7. The large-scale multi-purpose powder cleaning device for 3D printing according to claim 6, characterized in that: The transmission assembly (230) further includes a first bevel gear (237) fixedly sleeved on the through end of the rotating shaft (234), and a second bevel gear (238) meshing with the outer surface of the first bevel gear (237) and used in conjunction with the crossbar (222). The second bevel gear (238) is fixedly sleeved on the end of the crossbar (222) away from the crank (223).

8. The large-scale multi-purpose powder cleaning device for 3D printing according to claim 7, characterized in that: The oil injection mechanism (200) also includes an adjustment component (240) for controlling the amount of oil delivered per pumping unit (220). The adjustment component (240) is located on the outside of the cylinder (213).

9. The large-scale multi-purpose powder cleaning device for 3D printing according to claim 8, characterized in that: The adjustment assembly (240) includes a support plate (241) hinged to the outer surface of the cylinder (213), a threaded rod (242) fixedly mounted on the inner surface of the support plate (241) by a bearing, an internal threaded block (243) threaded to the outer surface of the threaded rod (242), a connecting rod (244) hinged to the outer surface of the internal threaded block (243) and used in conjunction with the crank (223), and an arc-shaped track (245) fixedly connected to the outer surface of the cylinder (213) and used in conjunction with the internal threaded block (243). The outer end face of the connecting rod (244) is hinged to the connection between the crank (223) and the drive rod (224), and the internal thread block (243) is slidably connected to the inner wall of the arc track (245).

10. The large-scale multi-purpose powder cleaning device for 3D printing according to claim 9, characterized in that: The outer end face of the threaded rod (242) is integrally formed with a star-shaped adjustment knob, and the surface of the star-shaped adjustment knob is provided with anti-slip texture.

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