Discharging device for concrete 3D printing tool end

Abstract

The present invention relates to a discharging device for a concrete 3D printing tool end, wherein the top of the discharging device is a power unit including a servo motor, and the bottom output end of the power unit is connected to a rotating shaft through a rigid coupling; the rotating shaft is inserted into an outer barrel, the top of the outer barrel is fixed to the power unit, the lower part of the rotating shaft shrinks, and the corresponding inner wall of the outer barrel expands outward, forming a cavity in between, and an injection pipe is connected to the cavity from the outer barrel wall; the bottom end of the outer barrel is connected to a tubular rotating head through a bearing, and the bottom end of the rotating shaft is horizontally penetrated and inserted into a connecting pin, and the two ends of the connecting pin are inserted into the pin holes correspondingly arranged on the inner wall of the rotating head. The present invention adopts a rotating discharging head, so that the print heads with different cross-sectional shapes can ensure the integrity of the cross-sectional shape during the concrete printing process; the present invention adopts a pneumatic valve as a switch to control the inlet and outlet heads, so that the print head can adapt to more working conditions and has a good application effect on refined concrete printing.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete 3D construction, and in particular to a discharging device for a concrete 3D printing tool end. Background Art

[0002] With the development of traditional concrete construction, its limitations have gradually been exposed. For complex special-shaped structures, traditional concrete pouring methods are difficult to cope with. Its high cost, low construction efficiency and slow construction speed have seriously restricted the development of traditional concrete pouring in local areas. Therefore, in combination with the development of modern industry, concrete pouring and industrial robots have been combined to give rise to concrete 3D printing construction. Its advantages are high construction efficiency and strong personalization, which transforms traditional construction from mainly relying on human physical labor to mainly relying on human mental labor to achieve purposeful construction. In concrete 3D printing construction, the tool end is the core part, which largely determines the printing efficiency, printing quality and printing form.

[0003] Currently, the existing tool end discharge ports are mostly fixed, and the start and stop of discharge can only be controlled by a pump truck. It is difficult to ensure the integrity of the cross-sectional shape, and the printing quality is limited, making it difficult to cope with fine concrete printing. Summary of the invention

[0004] The purpose of the present invention is to provide a discharging device for a concrete 3D printing tool end, which is endowed with a discharging port with a rotation function and a switch function, thereby overcoming the defects in the prior art.

[0005] The technical solution adopted by the present invention is:

[0006] The discharging device for the concrete 3D printing tool end is characterized by:

[0007] The top of the discharging device is a power unit including a servo motor, and the output end at the bottom of the power unit is connected to the rotating shaft through a rigid coupling;

[0008] The rotating shaft is inserted into the outer barrel, the top of the outer barrel is fixed to the power unit, the lower part of the rotating shaft is contracted, and the corresponding inner wall of the outer barrel is expanded outward to form a cavity, and the injection pipe is connected to the cavity from the outer barrel wall;

[0009] The bottom end of the outer barrel is connected to the tubular rotating head through a bearing, the bottom end of the rotating shaft is horizontally penetrated and inserted into a connecting pin, and both ends of the connecting pin are inserted into pin holes correspondingly arranged on the inner wall of the rotating head.

[0010] The power unit includes a servo motor, a reducer, a rigid coupling, a reducer seat, a flange and a bearing plate from top to bottom;

[0011] A reducer is installed under the servo motor and fixed by motor screws. A rigid coupling is installed at the output end of the reducer, and the rigid coupling is connected to the rotating shaft.

[0012] The bottom of the reducer is fixed to the reducer seat by reducer screws, the rigid coupling and the top of the rotating shaft are located in the reducer seat, the bottom of the reducer seat is fixed to the flange by the reducer seat screws, and the flange is fixed to the bearing plate by the flange screws.

[0013] The top of the outer barrel is fixed to the flange by outer barrel screws.

[0014] The upper part of the rotating shaft is in close contact with the inner wall of the outer barrel, and a sealing ring for the rotating shaft is arranged around the circumference. The sealing ring for the rotating shaft is located in the annular groove of the outer wall of the rotating shaft.

[0015] A bearing tray is arranged at the bottom end of the outer barrel, and the bearing tray is fixed to the bottom end of the outer barrel by means of horizontal set screws, and a bearing connecting the outer barrel and the rotating head is located in the bearing tray.

[0016] The top edge of the rotating head is expanded outward to form a shoulder, the shoulder is located in the bearing tray, and an outer ring needle roller bearing is respectively arranged on the upper end face and the lower end face of the shoulder;

[0017] A thrust needle roller bearing is arranged between the top side wall of the rotating head and the inner side of the bottom end of the bearing tray.

[0018] The bottom end of the outer barrel is inserted into the top of the rotating head, and a sealing ring for the outer barrel is arranged between the inner side of the top of the rotating head and the outer side of the bottom end of the outer barrel, and the sealing ring for the outer barrel is located in the annular groove of the outer wall of the bottom end of the outer barrel.

[0019] A pneumatic valve is arranged outside the injection pipe, one end of the pneumatic valve is an injection adapter, and the other end is an output adapter, and the output adapter is connected to the injection pipe;

[0020] The outlet of the pneumatic valve is connected to the rotating threaded end of the output adapter, and the injection pipe is connected to the stationary threaded end of the output adapter.

[0021] The injection pipe is welded obliquely to the outer barrel wall from top to bottom by welding.

[0022] The connecting pin is inserted into the pin hole of the rotating shaft and fixed by welding.

[0023] The present invention has the following advantages:

[0024] The present invention adopts a rotating discharge head, so that the print heads with different cross-sectional shapes can ensure the integrity of the cross-sectional shape during the concrete printing process; the present invention adopts a pneumatic valve as a switch to control the inlet and outlet heads, so that the print head can adapt to more working conditions and has a good application effect on refined concrete printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a longitudinal sectional view of the present invention.

[0026] Figure 2It is a side view of the present invention.

[0027] Figure 3 This is a schematic diagram of the present invention in conjunction with a robotic arm.

[0028] In the figure, 1-servo motor, 2-reducer, 3-rigid coupling, 4-reducer seat, 5-flange, 6-carrying plate, 7-outer barrel, 8-injection pipe, 9-sealing ring for outer barrel, 10-rotating shaft, 11-sealing ring for rotating shaft, 12-connecting pin, 13-rotating head, 14-outer ring needle roller bearing, 15-thrust needle roller bearing, 16-bearing tray, 17-pneumatic valve, 18-injection adapter, 19-output adapter, 20-setting screw, 21-outer barrel screw, 22-flange screw, 23-reducer seat screw, 24-reducer screw, 25-motor screw. DETAILED DESCRIPTION

[0029] The present invention is described in detail below in conjunction with specific implementation modes.

[0030] The present invention relates to a discharging device for a concrete 3D printing tool end, comprising a power unit, a rotating unit and a start-stop control unit; the power unit comprises: a servo motor 1, a reducer 2, a rigid coupling 3, a reducer seat 4, a flange 5, and a bearing plate 6; the rotating unit comprises: an outer barrel 7, an injection pipe 8, a sealing ring for the outer barrel 9, a rotating shaft 10, a sealing ring for the rotating shaft 11, a connecting pin 12, a rotating head 13, an outer ring needle roller bearing 14, a thrust needle roller bearing 15 and a bearing tray 16; the start-stop control unit comprises: a pneumatic valve 17, an injection adapter 18, and an output adapter 19.

[0031] The top of the discharging device is a power unit including a servo motor 1, and the bottom output end of the power unit is connected to the rotating shaft 10 through a rigid coupling 3; the rotating shaft 10 is inserted into the outer barrel 7, the top of the outer barrel 7 is fixed to the power unit, the lower part of the rotating shaft 10 is contracted, and the corresponding inner wall of the outer barrel 7 is expanded outward to form a cavity in between, and the injection pipe 8 is connected to the cavity from the wall of the outer barrel 7; the bottom end of the outer barrel 7 is connected to the tubular rotating head 13 through a bearing, the bottom end of the rotating shaft 10 is horizontally penetrated and inserted into the connecting pin 12, and the two ends of the connecting pin 12 are inserted into the pin holes correspondingly set on the inner wall of the rotating head 13.

[0032] The power unit includes a servo motor 1, a reducer 2, a rigid coupling 3, a reducer seat 4, a flange 5 and a bearing plate 6 from top to bottom; the reducer 2 is installed below the servo motor 1 and fixed by a motor screw 25, the rigid coupling 3 is installed at the output end of the reducer 2, and the servo motor 1, the reducer 2 and the rigid coupling 3 are connected in series in sequence. The rigid coupling 3 is connected to the rotating shaft 10; the bottom of the reducer 2 is fixed to the reducer seat 4 by a reducer screw 24, the rigid coupling 3 and the top of the rotating shaft 10 are located in the reducer seat 4, the bottom of the reducer seat 4 is fixed to the flange 5 by a reducer seat screw 23, and the flange 5 is fixed to the bearing plate 6 by a flange screw 22.

[0033] The top of the outer barrel 7 is fixed to the flange 5 by the outer barrel screw 21. The upper part of the rotating shaft 10 is in close contact with the inner wall of the outer barrel 7, and a rotating shaft sealing ring 11 is arranged around the circumference, and the rotating shaft sealing ring 11 is located in the annular groove of the outer wall of the rotating shaft 10. The bottom of the outer barrel 7 is provided with a bearing tray 16, which is fixed to the bottom of the outer barrel 7 by a horizontal set screw 20, and the bearing connecting the outer barrel 7 and the rotating head 13 is located in the bearing tray 16. The top edge of the rotating head 13 is expanded to form a shoulder, which is located in the bearing tray 16. An outer ring needle bearing 14 is set on the upper end face and the lower end face of the shoulder to reduce the friction between the upper end face of the rotating head shoulder and the lower end of the outer barrel and the friction between the lower end face of the rotating head shoulder and the bottom of the bearing tray 16 hole; a thrust needle bearing 15 is set between the top side wall of the rotating head 13 and the inner side of the bottom end of the bearing tray 16 to reduce the friction between the rotating head 13 and the inner hole of the bearing tray 16 in the circumferential direction, and play a certain role in straightening the rotating head. The output shaft of the servo motor 1 drives the reducer 2 to rotate, and the reducer 2 drives the rotating shaft 10 to rotate through the rigid coupling 3, and the rotating shaft 10 drives the adapter 18 to rotate through the connecting pin 12.

[0034] The bottom end of the outer barrel 7 is inserted into the top of the rotating head 13, and an outer barrel sealing ring 9 is arranged between the inner side of the top of the rotating head 13 and the outer side of the bottom end of the outer barrel 7. The outer barrel sealing ring 9 is located in the annular groove of the outer wall of the bottom end of the outer barrel 7 to prevent concrete from overflowing through the gap of the rotating contact surface during printing.

[0035] A pneumatic valve 17 is arranged outside the injection pipe 8, one end of the pneumatic valve 17 is an injection adapter 18, and the other end is an output adapter 19, and the output adapter 19 is connected to the injection pipe 8; the outlet of the pneumatic valve 17 is connected to the rotating threaded end of the output adapter 19, and the injection pipe 8 is connected to the stationary threaded end of the output adapter 19, which can effectively avoid interference between the pneumatic valve and the flange during the installation process.

[0036] The injection pipe 8 is welded obliquely from top to bottom to the wall of the outer barrel 7. The connecting pin 12 is inserted into the pin hole of the rotating shaft 10 and fixed by welding.

[0037] The present invention is mainly applied to the end of a concrete 3D printing tool, and works under the joint action of a power unit, a rotation unit and a start-stop control unit to realize the start and stop of concrete output during the printing process, and to realize the rotation of the rotating head that meets the printing path, and has a good application effect on refined concrete printing.

[0038] The content of the present invention is not limited to the embodiments listed, and any equivalent changes made to the technical solution of the present invention by ordinary technicians in this field after reading the description of the present invention are covered by the claims of the present invention.

Claims

1. The discharging device for the concrete 3D printing tool end, Features: The top of the discharging device is a power unit including a servo motor (1), and the output end at the bottom of the power unit is connected to the rotating shaft (10) via a rigid coupling (3); The rotating shaft (10) is inserted into the outer barrel (7), the top of the outer barrel (7) is fixed to the power unit, the lower part of the rotating shaft (10) is contracted, and the corresponding inner wall of the outer barrel (7) is expanded outward, forming a cavity therebetween, and the injection pipe (8) is connected to the cavity from the wall of the outer barrel (7); The bottom end of the outer barrel (7) is connected to the tubular rotating head (13) via a bearing, the bottom end of the rotating shaft (10) is inserted transversely through the connecting pin (12), and both ends of the connecting pin (12) are inserted into corresponding pin holes arranged on the inner wall of the rotating head (13); The power unit comprises, from top to bottom, a servo motor (1), a reducer (2), a rigid coupling (3), a reducer base (4), a flange (5) and a bearing plate (6); A reducer (2) is installed below the servo motor (1) and fixed by means of a motor screw (25); a rigid coupling (3) is installed at the output end of the reducer (2), and the rigid coupling (3) is connected to the rotating shaft (10); The bottom of the reducer (2) is fixed to the reducer base (4) by a reducer screw (24), the rigid coupling (3) and the top of the rotating shaft (10) are located in the reducer base (4), the bottom of the reducer base (4) is fixed to the flange (5) by a reducer base screw (23), and the flange (5) is fixed to the bearing plate (6) by a flange screw (22); The top edge of the rotating head (13) is expanded outward to form a shoulder, the shoulder is located in the bearing tray (16), and an outer ring needle roller bearing (14) is respectively arranged on the upper end surface and the lower end surface of the shoulder; A thrust needle roller bearing (15) is arranged between the top side wall of the rotating head (13) and the inner side of the bottom end of the bearing tray (16).

2. The discharging device for the concrete 3D printing tool end according to claim 1, Features: The top end of the outer barrel (7) is fixed to the flange (5) by means of outer barrel screws (21).

3. The discharging device for the concrete 3D printing tool end according to claim 1 or 2, Features: The upper portion of the rotating shaft (10) is in close contact with the inner wall of the outer barrel (7), and a rotating shaft sealing ring (11) is arranged around the rotating shaft. The rotating shaft sealing ring (11) is located in an annular groove on the outer wall of the rotating shaft (10).

4. The discharging device for the concrete 3D printing tool end according to claim 3, Features: A bearing tray (16) is provided at the bottom end of the outer barrel (7). The bearing tray (16) is fixed to the bottom end of the outer barrel (7) by means of horizontal set screws (20). The bearing connecting the outer barrel (7) and the rotating head (13) is located in the bearing tray (16).

5. The discharging device for the concrete 3D printing tool end according to claim 4, Features: The bottom end of the outer barrel (7) is inserted into the top of the rotating head (13), and a sealing ring (9) for the outer barrel is arranged between the inner side of the top of the rotating head (13) and the outer side of the bottom end of the outer barrel (7). The sealing ring (9) for the outer barrel is located in the annular groove of the outer wall of the bottom end of the outer barrel (7).

6. The discharging device for the concrete 3D printing tool end according to claim 5, Features: A pneumatic valve (17) is arranged outside the injection pipe (8); one end of the pneumatic valve (17) is an injection adapter (18), and the other end is an output adapter (19); the output adapter (19) is connected to the injection pipe (8); The outlet of the pneumatic valve (17) is connected to the rotating threaded end of the output adapter (19), and the injection pipe (8) is connected to the stationary threaded end of the output adapter (19).

7. The discharging device for the concrete 3D printing tool end according to claim 6, Features: The injection pipe (8) is welded obliquely to the wall of the outer barrel (7) from top to bottom by welding.

8. The discharging device for the concrete 3D printing tool end according to claim 7, Features: The connecting pin (12) is inserted into the pin hole of the rotating shaft (10) and fixed by welding.

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