Concrete 3D printing device with rotary nozzle

Abstract

The concrete 3D printing device comprises an extrusion mechanism and a rotating mechanism, the extrusion mechanism comprises a fixing frame, a suspension frame plate is arranged on the lower side of the fixing frame, the suspension frame plate is connected with a material barrel, an extrusion motor is arranged on the fixing frame, an output shaft of the extrusion motor is connected with an extrusion shaft, spiral extrusion blades are arranged on the extrusion shaft, and the rotation nozzle is arranged on the rotation mechanism. The rotating mechanism comprises a motor support, the motor support is provided with a material pipe connected with a discharging port of the charging barrel, the outer side of the material pipe is provided with an outer tooth slewing bearing, the outer ring of the outer tooth slewing bearing is connected with a rotating sleeve, the motor support is provided with a rotating motor, the output end of the rotating motor is provided with a driving gear, and the driving gear is connected with the rotating sleeve. The lower end of the rotary sleeve is connected with a nozzle flow guide cover, and a nozzle is installed at the bottom of the nozzle flow guide cover. According to the rotary nozzle, rotation of the nozzle is achieved in the printing process, and the smoothness, flatness and uniformity in the printing and stacking process are improved.

Description

Technical Field

[0001] The utility model relates to the field of 3D printing devices, in particular to a concrete 3D printing device with a rotating nozzle. Background Art

[0002] Concrete 3D printing is an advanced construction technology that uses specially designed 3D printers and concrete materials to build building structures in a layer-by-layer manner. In recent years, concrete 3D printing technology has received extensive attention and research in the fields of construction, infrastructure, and engineering. With the development of technology, the printing speed and accuracy of concrete 3D printing have been significantly improved. Compared with traditional construction methods, concrete 3D printing can significantly shorten the construction period, improve construction efficiency, and greatly reduce construction costs.

[0003] Concrete 3D printing is widely used at home and abroad. Circular nozzles are generally used for printing. During the stacking process of the extruded strips, the side surface of the stacked layer appears as a layer of arcs, which is not smooth, neat and beautiful. Rectangular nozzles are also used, but due to certain problems with concrete stacking at corners, they are not used frequently. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a concrete 3D printing device with a rotating nozzle, which can realize the rotation of the nozzle during the printing process and improve the smoothness and uniformity of the printing stacking process.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a concrete 3D printing device with a rotating nozzle, including an extrusion mechanism and a rotating mechanism, the extrusion mechanism includes a fixed frame, a suspension plate is provided on the lower side of the fixed frame, the suspension plate is connected to the barrel, an extrusion motor is provided on the fixed frame, the output shaft of the extrusion motor is connected to the extrusion shaft, the extrusion shaft is provided with a spiral extrusion blade, the extrusion shaft and the spiral extrusion blade are arranged in the barrel, a feed pipe extending into the barrel is provided on the fixed frame, a water inlet and a feed port are provided at the upper end of the feed pipe, the rotating mechanism includes a motor support arranged at the lower end of the barrel, a material pipe connected to the discharge port of the barrel is provided on the motor support, an external gear slewing bearing is provided on the outer side of the material pipe, the outer ring of the external gear slewing bearing is connected to the rotating sleeve, a rotating motor is provided on the motor support, and a driving gear is provided at the output end of the rotating motor, the driving gear is meshed with the outer ring gear of the external gear slewing bearing, the lower end of the rotating sleeve is connected to the nozzle guide cover, and the nozzle is installed at the bottom of the nozzle guide cover.

[0006] In a preferred solution, the rotating sleeve and the nozzle guide cover are both connected to the inner ring of the gearless slewing bearing, the outer ring of the gearless slewing bearing is connected to the support ring, and the support ring is connected to the motor support through a connecting cover plate.

[0007] In a preferred embodiment, the lower ends of the extrusion shaft and the spiral extrusion blades extend into the material pipe.

[0008] In a preferred embodiment, the fixing frame is provided with a through hole for the load-bearing shaft to pass through, the upper end of the load-bearing shaft is connected to the load-bearing platform, a weight sensor is provided between the load-bearing platform and the fixing frame, and the lower end of the load-bearing shaft is connected to the suspension plate.

[0009] In a preferred solution, a through hole in the fixing frame through which the load-bearing shaft passes is provided with a linear bearing, and the load-bearing shaft cooperates with the linear bearing to move up and down.

[0010] In a preferred solution, a photoelectric limit switch is provided on the motor support, a photoelectric limit block is provided on the rotating sleeve, and a rotation path of the photoelectric limit block is arranged directly below the photoelectric limit switch.

[0011] The utility model provides a concrete 3D printing device with a rotating nozzle. The buildings printed by the rotating nozzle have a smooth and fine surface, which improves the smoothness and uniformity of the printing and stacking process, improves the aesthetics of the building, and can also integrate relevant facilities and equipment such as pipelines and wires inside the wall, reducing the manpower and material resources required for subsequent decoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a front view of the utility model;

[0015] Figure 3 It is a cross-sectional view of the utility model;

[0016] Figure 4 is a cross-sectional view of the extrusion mechanism;

[0017] Figure 5 It is a structural schematic diagram of the rotating mechanism;

[0018] Figure 6 It is a schematic diagram of the cross-sectional structure of the rotating mechanism;

[0019] Figure 7 It is a schematic diagram of the positions of the photoelectric limit block and the photoelectric limit switch;

[0020] In the figure: fixed frame 1, suspension plate 2, barrel 3, extrusion motor 4, extrusion shaft 5, spiral extrusion blade 6, feed pipe 7, motor support 8, feed pipe 9, external gear slewing bearing 10, rotating sleeve 11, rotating motor 12, driving gear 13, nozzle guide cover 14, nozzle 15, toothless slewing bearing 16, support ring 17, connecting cover plate 18, load-bearing shaft 19, load-bearing platform 20, linear bearing 21, photoelectric limit switch 22, photoelectric limit block 23, weight sensor 24, water inlet 701, feed inlet 702. DETAILED DESCRIPTION

[0021] like Figures 1 to 7 As shown, a concrete 3D printing device with a rotating nozzle includes an extrusion mechanism and a rotating mechanism. The extrusion mechanism includes a fixed frame 1, and the fixed frame 1 is used to connect with a track slide. A suspension plate 2 is provided on the lower side of the fixed frame 1, and the suspension plate 2 is connected to a barrel 3. The suspension plate 2 and the barrel 3 can be fixedly connected, or connected by a snap-on connection to facilitate the disassembly of the barrel 3.

[0022] The fixed frame 1 is provided with an extrusion motor 4, the output shaft of the extrusion motor 4 is connected to the extrusion shaft 5, the extrusion shaft 5 is provided with a spiral extrusion blade 6, the extrusion shaft 5 and the spiral extrusion blade 6 are arranged in the barrel 3, the extrusion motor 4 drives the extrusion shaft 5 and the spiral extrusion blade 6 to rotate synchronously, and the 3D printing material in the barrel 3 is extruded, and the fixed frame 1 is provided with a feed pipe 7 extending into the barrel 3, and the upper end of the feed pipe 7 is provided with a water inlet 701 and a feed port 702. Specifically, the upper end of the feed pipe 7 is connected to the water inlet pipe and the feed pipe respectively through a tee. The 3D printing material is added through the feed port 702, and water is added in real time through the water inlet 701 to slow down the hardening of the concrete material.

[0023] The rotating mechanism includes a motor support 8 arranged at the lower end of the barrel 3, the motor support 8 includes a support plate and a connecting plate, the support plate is connected to the barrel 3 through the connecting plate, and a material pipe 9 connected to the discharge port of the barrel 3 is provided on the motor support 8. Specifically, the material pipe 9 is connected to the discharge port of the barrel 3 through a flange. The lower ends of the extrusion shaft 5 and the spiral extrusion blade 6 extend into the material pipe 9, which facilitates the extrusion of the material from the material pipe 9 and prevents the material from being blocked.

[0024] An external gear slewing bearing 10 is provided on the outside of the material pipe 9, and the external gear slewing bearing 10 is arranged on the lower side of the support plate of the motor support 8. The outer ring of the external gear slewing bearing 10 is connected to the rotating sleeve 11, and the upper end of the rotating sleeve 11 is provided with a flange connected to the external gear slewing bearing 10. A rotating motor 12 is provided on the motor support 8, and a driving gear 13 is provided at the output end of the rotating motor 12. The driving gear 13 is meshed with the outer ring gear of the external gear slewing bearing 10, and the lower end of the rotating sleeve 11 is connected to the nozzle guide cover 14, and the nozzle 15 is installed at the bottom of the nozzle guide cover 14. In this embodiment, the nozzle 15 uses a rectangular knife nozzle, and the nozzle 15 is connected to the nozzle guide cover 14 through a clamp.

[0025] The driving gear 13 is driven to rotate by the rotating motor 12, and the driving gear 13 synchronously drives the external gear slewing bearing 10 to rotate, so that the rotating sleeve 11 rotates relative to the material pipe 9, and the rotating sleeve 11 rotates synchronously with the nozzle guide cover 14 and the nozzle 15 to realize the rotation control of the nozzle 15.

[0026] In this embodiment, the rotating sleeve 11 and the nozzle guide cover 14 are both connected to the inner ring of the gearless slewing bearing 16 , the outer ring of the gearless slewing bearing 16 is connected to the support ring 17 , and the support ring 17 is connected to the motor support 8 via a connecting cover plate 18 .

[0027] The provision of the toothless slewing bearing 16 improves the rotation stability of the rotating sleeve 11 and the nozzle guide cover 14 .

[0028] Preferably, the fixing frame 1 is provided with a through hole for the load-bearing shaft 19 to pass through, the upper end of the load-bearing shaft 19 is connected to the load-bearing platform 20, a weight sensor 24 is provided between the load-bearing platform 20 and the fixing frame 1, and the lower end of the load-bearing shaft 19 is connected to the suspension plate 2.

[0029] After the material enters the barrel 3, as the weight increases, the barrel 3 drives the suspension plate 2 and the load-bearing shaft 19 to move downward, so that the load-bearing platform 20 squeezes the weight sensor 24, thereby realizing the weighing of the weight of the material in the barrel 3 through the weight sensor 24, which is convenient for automatic feeding.

[0030] Furthermore, a linear bearing 21 is provided in the through hole of the fixing frame 1 through which the load-bearing shaft 19 passes, and the load-bearing shaft 19 cooperates with the linear bearing 21 to move up and down.

[0031] By providing the linear bearing 21, the stability of the load-bearing shaft 19 during movement is improved to prevent shaking.

[0032] Preferably, a photoelectric limit switch 22 is provided on the motor support 8, and a photoelectric limit block 23 is provided on the rotating sleeve 11. The photoelectric limit block 23 is connected to the flange at the upper end of the rotating sleeve 11 by bolts, and the rotation path of the photoelectric limit block 23 is set directly below the photoelectric limit switch 22.

[0033] After printing is completed, the nozzle 15 is driven to rotate a certain angle by the rotating motor 12, and the photoelectric limit block 23 rotates back to the photoelectric limit switch 22 to return to zero.

[0034] Working principle: concrete printing material is added into the barrel 3 through the feed port 702, water is added in real time through the water inlet 701 to prevent the concrete material from hardening, the extrusion motor 4 drives the extrusion shaft 5 and the spiral extrusion blade 6 to rotate synchronously, and the 3D printing material in the barrel 3 is extruded into the material tube 9, and the driving gear 13 is driven to rotate by the rotating motor 12, and the driving gear 13 synchronously drives the external gear slewing bearing 10 to rotate, so that the rotating sleeve 11 rotates relative to the material tube 9, and the rotating sleeve 11 rotates synchronously with the nozzle guide cover 14 and the nozzle 15 to realize the rotation control of the nozzle 15, and the concrete material in the material tube 9 is extruded into the nozzle 15 and extruded from the rotating nozzle 15. In the process of concrete extrusion, the rotation movement of the nozzle 15 is realized, and the building printed by the rotating nozzle has a smooth and fine surface, which improves the aesthetics of the building, and can also integrate pipelines, wires and other related facilities and equipment inside the wall, reducing the human and material resources required for subsequent decoration.

Claims

1. A concrete 3D printing device with a rotating nozzle, Features: The invention comprises an extrusion mechanism and a rotation mechanism, wherein the extrusion mechanism comprises a fixed frame (1), a suspension plate (2) is provided on the lower side of the fixed frame (1), the suspension plate (2) is connected to a barrel (3), an extrusion motor (4) is provided on the fixed frame (1), the output shaft of the extrusion motor (4) is connected to an extrusion shaft (5), a spiral extrusion blade (6) is provided on the extrusion shaft (5), the extrusion shaft (5) and the spiral extrusion blade (6) are arranged in the barrel (3), a feed pipe (7) is provided on the fixed frame (1) and extends into the barrel (3), a water inlet (701) and a feed port (702) are provided at the upper end of the feed pipe (7), and the rotation mechanism comprises a set A motor support (8) is provided at the lower end of the barrel (3). A material pipe (9) connected to the material outlet of the barrel (3) is provided on the motor support (8). An external gear slewing bearing (10) is provided on the outer side of the material pipe (9). The outer ring of the external gear slewing bearing (10) is connected to a rotating sleeve (11). A rotating motor (12) is provided on the motor support (8). A driving gear (13) is provided at the output end of the rotating motor (12). The driving gear (13) meshes with the outer ring gear of the external gear slewing bearing (10). The lower end of the rotating sleeve (11) is connected to a nozzle guide cover (14). The nozzle (15) is installed at the bottom of the nozzle guide cover (14).

2. A concrete 3D printing device with a rotating nozzle according to claim 1, Features: The rotating sleeve (11) and the nozzle guide cover (14) are both connected to the inner ring of the toothless slewing bearing (16), the outer ring of the toothless slewing bearing (16) is connected to the support ring (17), and the support ring (17) is connected to the motor support (8) via a connecting cover plate (18).

3. A concrete 3D printing device with a rotating nozzle according to claim 1, Features: The lower ends of the extrusion shaft (5) and the spiral extrusion blades (6) extend into the material pipe (9).

4. A concrete 3D printing device with a rotating nozzle according to claim 1, Features: The fixing frame (1) is provided with a through hole for the bearing shaft (19) to pass through, the upper end of the bearing shaft (19) is connected to the bearing platform (20), a weight sensor (24) is provided between the bearing platform (20) and the fixing frame (1), and the lower end of the bearing shaft (19) is connected to the suspension plate (2).

5. A concrete 3D printing device with a rotating nozzle according to claim 1, Features: A through hole of the fixed frame (1) through which the load-bearing shaft (19) passes is provided with a linear bearing (21), and the load-bearing shaft (19) cooperates with the linear bearing (21) to move up and down.

6. A concrete 3D printing device with a rotating nozzle according to claim 1, Features: The motor support (8) is provided with a photoelectric limit switch (22), the rotating sleeve (11) is provided with a photoelectric limit block (23), and the rotation path of the photoelectric limit block (23) is arranged directly below the photoelectric limit switch (22).

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