Scraper device suitable for cleaning inner wall of concrete 3D printing head

Abstract

The utility model discloses a scraper device suitable for cleaning the inner wall of a concrete 3D printing head. The scraper device comprises a printing nozzle, a printing cylinder body, a spiral conveying shaft and a scraper plate. The concrete 3D printing head has the advantages that the inner wall of the concrete 3D printing head can be cleaned through the scraper plate, concrete is prevented from adhering to the interior of the printing head, waste of raw materials and follow-up cleaning difficulty are reduced, meanwhile, higher torque can be obtained through bevel gear transmission, transmission vibration and noise are reduced, and the service life of the printing head is prolonged. Therefore, the printing precision is ensured; according to the concrete 3D printing head, multi-angle cleaning of the inner wall of the concrete 3D printing head can be achieved by additionally installing the self-rotating type sprayers forming the multi-angle angle with the horizontal plane, and self-rotation of the scraper device can be achieved by arranging the multiple self-rotating type sprayers on the scraper device; meanwhile, the multiple rotating arms are matched with the rotating ring, it can be guaranteed that the axis and the rotating center of the scraper device cannot deviate, and therefore the cleaning effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to a scraping device, in particular to a scraping device suitable for cleaning the inner wall of a concrete 3D printing head, and belongs to the technical field of inner wall residue cleaning devices. Background Technique

[0002] 3D printing technology, also known as additive manufacturing technology, connects raw materials, a 3D printer, and a computer, and then the computer creates an object by stacking printing materials layer by layer. Different from traditional subtractive manufacturing methods (such as machining), 3D printing constructs an object by adding materials layer by layer, thereby realizing a fast and precise manufacturing process. Concrete 3D printing technology has become increasingly mature and is widely used in fields such as construction. Compared with traditional building construction methods, 3D printing technology can build buildings at a faster speed, with more precise results, and less resource input during the 3D printing process. However, residues will gradually accumulate on the inner wall of the concrete nozzle, affecting the smoothness of the nozzle pipeline. The traditional manual cleaning method requires frequent shutdowns and consumes a large amount of manpower, resulting in low efficiency.

[0003] After inspection, there is currently no device for cleaning the inner wall of a concrete 3D printer on the market. There are only a few 3D printer cleaning sets, which are sets combined by multiple tools and adopt various processes to clean 3D printing equipment. The existing cleaning sets cannot specifically clean the inner wall of a concrete 3D printer. At the same time, the cleaning process is cumbersome, consuming manpower, affecting the cleaning result of the concrete 3D printer, thus causing waste of raw materials and affecting the printing result of the concrete 3D printer. Content of the Utility Model

[0004] The purpose of the utility model is to provide a scraping device suitable for cleaning the inner wall of a concrete 3D printing head in order to solve at least one of the above technical problems.

[0005] The utility model realizes the above purpose through the following technical solutions: A scraping device suitable for cleaning the inner wall of a concrete 3D printing head includes a printing nozzle, a printing cylinder body, a screw conveyor shaft, and a scraping plate. The top of the printing nozzle is threadedly connected to the printing cylinder body. The scraping plate is movably arranged in the printing cylinder body. A driving component is arranged at the top end of the printing cylinder body. The power output end of the driving component is connected to the screw conveyor shaft. The scraping plate is rotationally connected to the screw conveyor shaft;

[0006] The driving component includes a motor and two bevel gears. One of the bevel gears is connected to the output shaft of the motor, and the other bevel gear is fixedly sleeved on the upper end of the screw conveyor shaft. The two bevel gears are vertically meshed and connected;

[0007] A plurality of scraping plates are evenly distributed. The upper end of the scraping plate is connected to a rotating arm, and the rotating arm is rotationally connected to the upper end shaft of the screw conveyor shaft. A self-rotating nozzle is provided on one side of the scraping plate close to the inner wall of the printing cylinder body. The other side of the scraping plate is connected to a water delivery pipe, and the water delivery pipe is communicated with the self-rotating nozzle. The other end of the water delivery pipe is connected to a self-rotating nozzle rotation control component.

[0008] As a further solution of the present utility model: One side of the printing cylinder body is communicated with a material cylinder. The upper end of the printing cylinder body is connected to a motor cover, and the top of the printing cylinder body is connected with a vertically arranged motor seat. The motor seat is fixedly connected to the motor, and the motor is horizontally arranged.

[0009] As a further solution of the present utility model: A key groove is provided on the rotating shaft of the motor. The rotating shaft of the motor is key-connected to the bevel gear through the key groove. A square key is provided on the upper end shaft of the screw conveyor shaft, and the upper end shaft of the screw conveyor shaft is key-connected to the bevel gear through the square key.

[0010] As a further solution of the present utility model: A first shaft neck and a second shaft neck are provided on the shaft of the screw conveyor shaft. A first deep groove ball roller bearing is clamped in the first shaft neck, and the outer side of the first deep groove ball roller bearing contacts the printing cylinder body. A second deep groove ball roller bearing is clamped in the second shaft neck, and a rotating ring is provided outside the second deep groove ball roller bearing. The rotating ring is fixedly connected to the rotating arm.

[0011] As a further solution of the present utility model: Threaded holes are provided on each scraping plate, and a plurality of threaded holes are threadedly connected to the self-rotating nozzle. The self-rotating nozzles are evenly distributed around the rotating ring at a 120° center. The number of self-rotating nozzles is the same as the number of threaded holes.

[0012] As a further solution of the present utility model: The nozzles of the self-rotating nozzles are horizontally symmetrically arranged at 10°, 20°, and 30° with the horizontal axis respectively.

[0013] As a further solution of the present utility model: The self-rotating nozzle rotation control component includes an upper sleeve body, a mandrel, a set screw, a lower sleeve body, a thrust bearing, a first deep groove bearing, a damping sleeve, a second deep groove bearing, a water outlet, a gasket, and a water outlet external connection body. The upper sleeve body and the lower sleeve body are butted together, and the butting part of the upper sleeve body and the lower sleeve body is connected by a set screw. A mandrel is sleeved inside the upper sleeve body and the lower sleeve body. A thrust bearing, a first deep groove bearing, a damping sleeve, and a second deep groove bearing are sequentially sleeved between the mandrel and the inner cavity of the lower sleeve body. One end of the mandrel extending outside the lower sleeve body is sleeved with a water outlet external connection body. A gasket is provided at the connection part between the water outlet external connection body and the end of the mandrel. A water outlet is provided on the water outlet external connection body, and the water outlet is communicated with the water delivery pipe.

[0014] The beneficial effects of the present utility model are:

[0015] 1. The setting of the scraper plate can achieve the cleaning of the inner wall of the concrete 3D printing head, preventing concrete from adhering to the inside of the printing head, thus reducing the waste of raw materials and the difficulty of subsequent cleaning. At the same time, higher torque can be obtained through bevel gear transmission, reducing the vibration and noise of the transmission, thereby ensuring the printing accuracy.

[0016] 2. By installing a spin-type nozzle at multiple angles to the horizontal plane, multi-angle cleaning of the inner wall of the concrete 3D printing head can be achieved. By opening multiple spin-type nozzles on the scraper device, the self-rotation of the scraper device can be realized. At the same time, the cooperation of multiple rotating arms and the rotating ring can ensure that the axis of the scraper device does not deviate from the rotation center, thus ensuring the cleaning effect.

[0017] 3. By adopting bevel gear transmission, power transmission between vertical axes can be achieved. Bevel gear transmission can transfer power from one vertical axis to another vertical axis. This structure is more flexible than using gear transmission with parallel axes and can achieve a larger speed ratio adjustment range, with smooth transmission and higher transmission efficiency. Description of the Drawings

[0018] Figure 1 is the overall structure diagram of the present utility model;

[0019] Figure 2 is the connection schematic diagram of the present utility model and the outer shell of the concrete 3D printer;

[0020] Figure 3 is the cross-sectional view of the bevel gear transmission mechanism of the present utility model;

[0021] Figure 4 is the structural schematic diagram of the spin nozzle of the present utility model;

[0022] Figure 5 is the connection structural schematic diagram of the bearing and the rotating ring of the present utility model;

[0023] Figure 6 is the schematic diagram of the spin nozzle rotation control component of the present utility model.

[0024] In the figure: 1. Printing nozzle, 2. Body of the printing cylinder, 3. Material cylinder, 4. Motor cover, 5. Motor base, 6. Motor, 7. Keyway, 8. Bevel gear, 9. Square key, 10. First deep groove ball roller bearing, 11. Screw conveyor shaft, 12. First journal, 13. Second deep groove ball roller bearing, 14. Rotating ring, 15. Second journal, 16. Rotating arm, 17. Scraping plate, 18. Water supply pipeline, 19. Self-rotating nozzle, 20. Threaded hole, 21. Self-rotating nozzle rotation control assembly, 211. Upper sleeve body, 212. Spindle, 213. Set screw, 214. Lower sleeve body, 215. Thrust bearing, 216. First deep groove bearing, 217. Damping sleeve, 218. Second deep groove bearing, 219. Water outlet, 2110. Gasket, 2111. External body of the water outlet. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1, as Figures 1 to 6 shown, a scraping device suitable for cleaning the inner wall of a concrete 3D printing head includes a printing nozzle 1, a body 2 of the printing cylinder, a screw conveyor shaft 11, and a scraping plate 17. The top of the printing nozzle 1 is threadedly connected to the body 2 of the printing cylinder. The scraping plate 17 is movably arranged in the body 2 of the printing cylinder. A driving assembly is provided at the top end of the body 2 of the printing cylinder. The power output end of the driving assembly is connected to the screw conveyor shaft 11. The scraping plate 17 is rotationally connected to the screw conveyor shaft 11. By arranging the scraping plate 17, the cleaning of the inner wall of the concrete 3D printing head can be realized, so as to prevent the adhesion of concrete inside the printing head, thereby reducing the waste of raw materials and the difficulty of subsequent cleaning;

[0027] The driving assembly includes a motor 6 and two bevel gears 8. One of the bevel gears 8 is connected to the output shaft of the motor 6, and the other bevel gear 8 is fixedly sleeved on the upper end of the screw conveyor shaft 11. The two bevel gears 8 are vertically meshed and connected. Through the transmission of the bevel gears 8, the power transmission between vertical axes can be realized. The transmission of the bevel gears 8 can transmit the power from one vertical axis to another vertical axis. This structure is more flexible than using gear transmission with parallel axes, and can achieve a larger speed ratio adjustment range, with stable transmission and higher transmission efficiency;

[0028] A number of scraping plates 17 are evenly distributed. The upper end of the scraping plate 17 is connected to a rotating arm 16. The rotating arm 16 is rotatably connected to the upper end shaft body of the screw conveyor shaft 11. The relative rotation between the scraping plate 17 and the screw conveyor shaft 11 can be achieved through the rotating arm 16. Thus, when the driving component drives the screw conveyor shaft 11 to rotate, it will not affect the rotation of the scraping plate 17. On the side of the scraping plate 17 close to the inner wall of the printing cylinder body 2, a self-rotating nozzle 19 is provided. On the other side plate body of the scraping plate 17, a water delivery pipe 18 is connected. The water delivery pipe 18 is communicated with the self-rotating nozzle 19. The other end of the water delivery pipe 18 is connected to a self-rotating nozzle rotation control component 21. The self-rotation of the scraping device for the printable cylinder body 2 is realized through the self-rotating nozzle 19. At the same time, the cooperation of multiple rotating arms and the rotating ring can ensure that the axis of the scraping device does not deviate from the rotation center, thus ensuring the cleaning effect.

[0029] Embodiment 2: In addition to all the technical features included in Embodiment 1, this embodiment further includes: A material cylinder 3 is communicated with one side of the printing cylinder body 2. The upper end of the printing cylinder body 2 is connected to a motor cover 4. The top of the printing cylinder body 2 is connected to a vertically arranged motor seat 5. The motor seat 5 is fixedly connected to the motor 6, and the motor 6 is horizontally arranged. The material cylinder 3 facilitates the delivery of the concrete printing raw materials into the printing cylinder body 2, and the provided motor seat 5 can firmly mount the motor 6 above the printing cylinder body 2, that is, it can stably provide driving force for the screw conveyor shaft 11.

[0030] A keyway 7 is provided on the rotating shaft of the motor 6. The rotating shaft of the motor 6 is key-connected to the bevel gear 8 through the keyway 7. A square key 9 is provided on the upper end shaft body of the screw conveyor shaft 11. The upper end shaft body of the screw conveyor shaft 11 is key-connected to the bevel gear 8 through the square key 9 to improve the firmness of the connection and prevent the loosening of the bevel gear 8 caused by long-term use.

[0031] A first journal 12 and a second journal 15 are provided on the shaft body of the screw conveyor shaft 11. A first deep groove ball roller bearing 10 is placed in the first journal 12. The outer side of the first deep groove ball roller bearing 10 contacts the printing cylinder body 2. A second deep groove ball roller bearing 13 is placed in the second journal 15. A rotating ring 14 is provided outside the second deep groove ball roller bearing 13. The rotating ring 14 is fixedly connected to the rotating arm 16. The provided first deep groove ball roller bearing 10 can ensure that the screw conveyor shaft 11 rotates more smoothly in the printing cylinder body 2 to realize the stirring and conveying of the concrete raw materials. And the provided second deep groove ball roller bearing 13 can ensure that the axis of the scraping plate 17 does not deviate from the rotation center under the rotation of the rotating ring 14 by multiple rotating arms 16, thus ensuring the cleaning effect.

[0032] Each scraper plate 17 is provided with threaded holes 20. A plurality of threaded holes 20 are threadedly connected to the self-rotating nozzles 19. The self-rotating nozzles 19 are evenly distributed around the rotating ring 14 at a central angle of 120°. The number of self-rotating nozzles 19 is the same as that of the threaded holes 20. The connection between the self-rotating nozzles 19 and the water delivery pipe 18 can be realized through the threaded holes 20.

[0033] The nozzles of the self-rotating nozzles 19 are horizontally symmetrically arranged at 10°, 20°, and 30° respectively with the horizontal axis, which can wash the inner wall of the barrel body 2 of the printing barrel from multiple angles and directions, facilitating the comprehensive cleaning of the inner wall of the concrete 3D printer.

[0034] The self-rotating nozzle rotation control assembly 21 includes an upper sleeve body 211, a spindle 212, a set screw 213, a lower sleeve body 214, a thrust bearing 215, a first deep groove bearing 216, a damping sleeve 217, a second deep groove bearing 218, a water outlet 219, a gasket 2110, and a water outlet external connection body 2111. The upper sleeve body 211 and the lower sleeve body 214 are butted together, and the butting part of the upper sleeve body 211 and the lower sleeve body 214 is connected by a set screw 213. A spindle 212 is sleeved inside the upper sleeve body 211 and the lower sleeve body 214. A thrust bearing 215, a first deep groove bearing 216, a damping sleeve 217, and a second deep groove bearing 218 are sequentially sleeved between the spindle 212 and the inner cavity of the lower sleeve body 214. A water outlet external connection body 2111 is sleeved at one end of the spindle 212 extending outside the lower sleeve body 214. A gasket 2110 is provided at the connection part between the water outlet external connection body 2111 and the end of the spindle 212. A water outlet 219 is provided on the water outlet external connection body 2111, and the water outlet 219 is communicated with the water delivery pipe 18. High-pressure water enters the spindle 212 through the upper sleeve body 211, passes through the channel therein, enters the water outlet external connection body 2111, and is connected to the water delivery pipe 18 at the water outlet 219, and then sprays out to form a high-speed jet. The jet generates a hydraulic torque, driving the self-rotating nozzle 19 to rotate around its axis. The high-pressure water enters the moving part spindle 212 in the fixed part upper sleeve body 211. The damping sleeve 217 in the lower sleeve body 214 controls the rotation speed of the self-rotating nozzle 19 by means of a centrifugal speed limit mechanism. The use of the self-rotating nozzle rotation control assembly 21 can effectively prevent the movement interference generated when connected to an external water source.

[0035] Pressurized water flow is input from the water delivery pipe orifice 18. The input pressurized water flow flows through the water delivery pipe to the spin-type spin nozzle 19. The pressurized water enters the nozzle 19 from the joint, forming a high-pressure spiral water flow. At the same time, the high-pressure spiral water flow reversely gives a driving force to the scraper plate 17, enabling the scraper plate 17 to rotate around the rotating ring 14 through the rotating arm 16. At the same time, the cooperation of multiple rotating arms 16 and the rotating ring 14 can ensure that the axis of the scraper device does not deviate from the rotation center, thus ensuring the cleaning effect; the spin nozzles 19 are evenly distributed around the rotating ring 14 at a 120° center. The nozzles of the spin nozzles 19 and the horizontal axis are symmetrically arranged at 10°, 20°, and 30° respectively, which is conducive to comprehensively cleaning the inner wall of the concrete 3D printer.

[0036] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0037] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A scraping device applicable to the inner wall cleaning of a concrete 3D printing head, comprising a printing nozzle (1), a printing cylinder body (2), a spiral conveying shaft (11) and a scraping plate (17), characterized in that: The top of the printing nozzle (1) is threadedly connected to the body of the printing cylinder (2). The scraper plate (17) is movably arranged inside the body of the printing cylinder (2). A driving assembly is provided at the top end of the body of the printing cylinder (2). The power output end of the driving assembly is connected to the screw conveyor shaft (11). The scraper plate (17) is rotationally connected to the screw conveyor shaft (11). The driving assembly includes a motor (6) and two bevel gears (8). One of the bevel gears (8) is connected to the output shaft of the motor (6), and the other bevel gear (8) is fixedly sleeved on the upper end of the screw conveyor shaft (11). The two bevel gears (8) are vertically meshed and connected. A number of scraper plates (17) are evenly distributed. The upper end of the scraper plate (17) is connected to a rotating arm (16). The rotating arm (16) is rotationally connected to the upper end shaft body of the screw conveyor shaft (11). On the side of the scraper plate (17) close to the inner wall of the body of the printing cylinder (2), a self-rotating nozzle (19) is provided. On the other side of the scraper plate (17), a water delivery pipe (18) is connected. The water delivery pipe (18) is communicated with the self-rotating nozzle (19). The other end of the water delivery pipe (18) is connected to a self-rotating nozzle rotation control assembly (21).

2. The doctor blade device according to claim 1, wherein: One side of the body of the printing cylinder (2) is communicated with a material cylinder (3). The upper end of the body of the printing cylinder (2) is connected to a motor cover (4). The top of the body of the printing cylinder (2) is connected to a vertically arranged motor base (5). The motor base (5) is fixedly connected to the motor (6), and the motor (6) is horizontally arranged.

3. The doctor blade device according to claim 1, characterized in that: A keyway (7) is provided on the rotating shaft of the motor (6). The rotating shaft of the motor (6) is key-connected to the bevel gear (8) through the keyway (7). A square key (9) is provided on the upper end shaft body of the screw conveyor shaft (11). The upper end shaft body of the screw conveyor shaft (11) is key-connected to the bevel gear (8) through the square key (9).

4. The doctor blade device according to claim 1, characterized in that: A first journal (12) and a second journal (15) are provided on the shaft body of the screw conveyor shaft (11). A first deep groove ball roller bearing (10) is clamped in the first journal (12). The outer side of the first deep groove ball roller bearing (10) contacts the body of the printing cylinder (2). A second deep groove ball roller bearing (13) is clamped in the second journal (15). A rotating ring (14) is provided outside the second deep groove ball roller bearing (13). The rotating ring (14) is fixedly connected to the rotating arm (16).

5. The doctor blade device according to claim 1, characterized in that: Each scraper plate (17) is provided with a threaded hole (20). The plurality of threaded holes (20) are threadedly connected to the self-rotating nozzle (19). The self-rotating nozzles (19) are centered and distributed at 120° around the rotating ring (14). The number of self-rotating nozzles (19) is the same as the number of threaded holes (20).

6. The doctor blade device according to claim 1, wherein: The nozzles of the self-rotating nozzles (19) are horizontally symmetrically arranged at 10°, 20°, and 30° respectively with respect to the horizontal axis.

7. The doctor blade device according to claim 1, characterized in that: The spin nozzle rotation control assembly (21) comprises an upper sleeve (211), a spindle (212), a set screw (213), a lower sleeve (214), a thrust bearing (215), a first deep groove bearing (216), a damping sleeve (217), a second deep groove bearing (218), a water outlet (219), a gasket (2110), and a water outlet external connection body (2111); the upper sleeve (211) and the lower sleeve (214) are butt-jointed together; the butt joints of the upper sleeve (211) and the lower sleeve (214) are connected via the set screw (213); the upper sleeve (211) and the lower sleeve (214) are butt-jointed together; ) is sleeved with a spindle (212), and a thrust bearing (215), a first deep groove bearing (216), a damping sleeve (217), and a second deep groove bearing (218) are sleeved in sequence between the spindle (212) and the inner cavity of the lower sleeve (214). One end of the spindle (212) extending out of the outer side of the lower sleeve (214) is sleeved with a water outlet external connecting body (2111), and a gasket (2110) is provided at the connection portion between the water outlet external connecting body (2111) and the end of the spindle (212). A water outlet (219) is provided on the water outlet external connecting body (2111), and the water outlet (219) is connected to the water delivery pipeline (18).

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