Extrusion device of building 3D printer

Abstract

The utility model discloses an extrusion device of a building 3D printer, and belongs to the technical field of 3D printers, the extrusion device of the building 3D printer comprises a box body, the bottom end of the box body is rotatably connected with a rotating pipe, one end of the rotating pipe far away from the box body is provided with a shaping sleeve, and the top end of the box body is slidably connected with a lifting plate; a motor is fixedly connected to the top end of the lifting plate, a stirring tank is fixedly connected to the inner side of the box body, one side of the stirring tank and the box body are fixedly connected with a feeding opening in a penetrating mode, and a rotating mechanism is arranged in a rotating pipe. Through the L-shaped rod in the rotating structure, the discharging pipe, the feeding pipe and the conveying pipe form a special extending structure capable of synchronously rotating, the phenomenon that a printing opening cannot reach a designated position for printing operation is avoided, the flexibility of the device is improved, meanwhile, stable connection is achieved through the L-shaped rod, and the printing efficiency is improved. The whole rotating mechanism keeps high synchronism in the moving process, and the printing quality problem caused by unstable transmission is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to 3D printer technical field, concretely relates to a kind of extrusion device of building 3D printer. BACKGROUND

[0002] 3D printing building is a kind of building that is printed by machine equipment automatically intelligent according to the building drawing program of pre-design, with special printing ink, reaches building construction standard and has practical function. Specifically speaking, it is to generate three-dimensional information by 3D modeling and segmentation using computer to concrete component, then the prepared concrete mixture is extruded by nozzle according to the set program by mechanical control through extrusion device, and finally the concrete component is obtained, that is, the formed building.

[0003] The extrusion mechanism of the existing 3D printing building 3D printer is mostly fixed structure, and the movement of the extrusion mechanism is mostly adjusted by the movement of the whole device, so that the movement speed and direction of the device are limited during printing, resulting in low printing efficiency. In addition, the extrusion mechanism may collide with obstacles due to its vertical box structure, so it is easy to collide with existing obstacles such as steel bars during printing, resulting in the problems of unable to print or not fine enough printing. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, and to provide an extrusion device of building 3D printer.

[0005] The technical scheme adopted to solve the above technical problem is: an extrusion device of building 3D printer, comprising a box body, a rotating pipe rotatably connected to the bottom end of the box body, a shaping sleeve installed at the end of the rotating pipe away from the box body, a lifting plate slidably connected to the top end of the box body, a motor fixedly connected to the top end of the lifting plate, a stirring pot fixedly connected to the inner side of the box body, a feeding port fixedly connected to the side of the stirring pot and penetrating through the box body, and a rotating mechanism arranged in the rotating pipe.

[0006] Further, the rotating mechanism comprises a discharge pipe, a feeding pipe and a conveying pipe, the discharge pipe, the feeding pipe and the conveying pipe are all located in the rotating pipe and are rotatably connected with the rotating pipe, the feeding pipe is rotatably connected with the connecting end of the rotating pipe and the box body, and the outer side of the connecting end of the rotating pipe and the outer side of the penetrating end of the feeding pipe are respectively fixedly connected with a driven gear.

[0007] Through the above technical scheme, the cooperation of the discharge pipe, the feeding pipe and the conveying pipe improves the stability of printing, and the movement of the rotating mechanism makes the material less likely to be blocked, realizing continuous extrusion.

[0008] Further, the feeding pipe and the feeding pipe and the discharge pipe are fixedly connected with the transmission disc at the two ends close to each other, a plurality of the transmission discs are fixedly connected with the connecting hose between each other, a plurality of the transmission discs are provided with a plurality of L-shaped rods between each other, one end of the L-shaped rod is slidably connected with one of the transmission discs, the other end of the L-shaped rod is slidably connected with the other transmission disc, and the discharge pipe is slidably connected with the shaping sleeve at the end away from the feeding pipe.

[0009] Through the above technical scheme, the L-shaped rod is arranged, so that the discharge pipe, the feeding pipe and the feeding pipe form a special extension structure capable of synchronous rotation, which avoids the collision between the box structure of the extrusion mechanism and the obstacle, so that the printing port cannot reach the specified position for printing operation, thereby improving the flexibility of the device, and the L-shaped rod ensures the relatively stable connection between the pipes, so that the whole rotating mechanism maintains high synchronism during movement, which not only improves the efficiency of material conveying, but also effectively reduces the printing quality problems caused by unstable transmission.

[0010] Further, one side of each of the two driven gears is drivingly connected with a transmission gear, the inner sides of the two transmission gears are provided with ratchets, the ratchets provided on the inner sides of the two transmission gears are oppositely arranged, the transmission gears are rotatably connected with a fixed frame, the fixed frame is fixedly connected with the inner wall of the box, the top end of the fixed frame is fixedly connected with a servo motor, the power output end of the servo motor is fixedly connected with a first transmission rod, the upper and lower ends of the cylindrical surface of the first transmission rod are fixedly connected with a sliding sleeve, the inner side of the sliding sleeve is slidably connected with a right-angled trapezoidal block, the right-angled trapezoidal blocks of different heights are oppositely arranged, the right-angled end of the right-angled trapezoidal block is fixedly connected with a spring, the spring is located in the inner side of the sliding sleeve, the end of the spring away from the right-angled trapezoidal block is fixedly connected with the first transmission rod, and the inclined end of the right-angled trapezoidal block is slidably connected with the ratchet.

[0011] Through the above technical scheme, the ratchet and pawl mechanism is arranged, which ensures that the transmission gear will not reverse during rotation, thereby ensuring the stability and reliability of the whole rotating mechanism, and since the ratchet structures of the two transmission gears are oppositely arranged, only one transmission gear can be driven to rotate when the servo motor rotates in one direction, which greatly simplifies the transmission connection and further improves the stability and service life of the whole rotating mechanism.

[0012] Further, the top end of the stirring tank is fixedly connected with a hydraulic push rod, the telescopic end of the hydraulic push rod is slidably connected with the box, the telescopic end of the hydraulic push rod is fixedly connected with the lifting plate, the power output end of the motor is fixedly connected with a second transmission rod, and the second transmission rod is rotatably connected with the inside of the stirring tank.

[0013] Through the technical scheme, the hydraulic push rod can lift the motor, so that the second transmission rod is lifted, the sealing ring is away from the opening at the bottom end of the stirring tank, and the extrusion screw pushes the material in the tank out.

[0014] Further, the second transmission rod is fixedly connected with a plurality of stirring plates on the circumferential surface of the middle part, the outer surfaces of the plurality of stirring plates are slidably attached to the inner wall of the stirring tank, the plurality of stirring plates are arranged in a circumferential array, a scraper is fixedly connected to the bottom surface of the second transmission rod, the scraper has a cross structure, the outer surface of the scraper is slidably attached to the inner wall of the stirring tank, a sealing ring is fixedly connected to the bottom end of the second transmission rod, the sealing ring is slidably engaged with the opening at the bottom end of the stirring tank, and an extrusion screw is fixedly connected to the middle part of the bottom end of the sealing ring and rotationally connected to the inner wall of the feeding pipe.

[0015] Through the technical scheme, when the motor drives the second transmission rod to rotate, the stirring plates in the middle part continuously stir the material in the tank body to prevent solidification, and the scraper at the bottom of the second transmission rod continuously scrapes the adhered material on the inner wall to reduce material residue and waste.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The utility model discloses a rotating mechanism is set up in the pipeline of the extrusion device discharge gate, through the L type rod in the rotating structure, make the discharge pipe, feeding pipe and the material conveying pipe form the special extension structure of synchronous rotation, avoided the printing mouth and reached the designated position and printed the operation of operation, therefore improved the device flexibility, and the L type rod ensured the relatively stable connection between the pipeline, thereby make the whole rotating mechanism keep higher synchronism in the movement process, not only improved the efficiency of material conveying, but also effectively reduced the printing quality problem caused by unstable transmission. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the inside structure schematic diagram of the utility model's box;

[0020] Figure 3 It is the power structure schematic diagram of the utility model's rotating mechanism;

[0021] Figure 4 It is the inside structure cross section schematic diagram of the utility model's stirring tank;

[0022] Figure 5 It is the inside structure cross section schematic diagram of the utility model's rotating pipe.

[0023] Label: 1, box; 2, rotating pipe; 3, shaping sleeve; 4, lifting plate; 5, motor; 6, feed inlet; 7, stirring tank; 8, hydraulic push rod; 9, servo motor; 10, transmission gear; 11, fixed frame; 12, first transmission rod; 13, right trapezoidal block; 14, ratchet; 15, spring; 16, sliding sleeve; 17, extrusion screw; 18, second transmission rod; 19, stirring plate; 20, scraper; 21, sealing ring; 22, discharge pipe; 23, driven gear; 24, feed pipe; 25, transmission disc; 26, L-shaped rod; 27, connecting hose; 28, feed pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0025] As Figures 1 to 5 shown, the extrusion device of the building 3D printer of the embodiment includes a box 1, the bottom end of the box 1 is rotatably connected with a rotating pipe 2, the end of the rotating pipe 2 away from the box 1 is provided with a shaping sleeve 3, the top end of the box 1 is slidably connected with a lifting plate 4, the top end of the lifting plate 4 is fixedly connected with a motor 5, the inner side of the box 1 is fixedly connected with a stirring tank 7, the side of the stirring tank 7 is fixedly connected with a feed inlet 6 penetrating through the box 1, and a rotating mechanism is arranged in the rotating pipe 2.

[0026] The rotating mechanism includes a discharge pipe 22, a feed pipe 24 and a feed pipe 28, the discharge pipe 22, the feed pipe 24 and the feed pipe 28 are all located in the rotating pipe 2 and are rotatably connected with the rotating pipe 2, the feed pipe 24 is rotatably connected with the connecting end of the rotating pipe 2 and the box 1, and the outer side of the end of the rotating pipe 2 connected with the box 1 and the outer side of the penetrating end of the feed pipe 24 are respectively fixedly connected with a driven gear 23.

[0027] The feed pipe 24 and the feed pipe 28 and the feed pipe 28 are respectively fixedly connected with a transmission disc 25 at the two ends close to each other, a plurality of connecting hoses 27 are fixedly connected between every two transmission discs 25, a plurality of L-shaped rods 26 are arranged between every two transmission discs 25, one end of the L-shaped rod 26 is slidably connected with one of the transmission discs 25, the other end of the L-shaped rod 26 is slidably connected with the other transmission disc 25, and the end of the discharge pipe 22 away from the feed pipe 28 is slidably connected with the shaping sleeve 3.

[0028] Two driven gears 23 side are respectively connected with transmission gear 10, two transmission gear 10 inner side is provided with ratchet 14, two transmission gear 10 inner side setting ratchet 14 is reverse setting, transmission gear 10 between rotationally connected with fixed frame 11, fixed frame 11 and the inner wall of box 1 fixedly connected, fixed frame 11 top end fixedly connected with servo motor 9, servo motor 9 power output end fixedly connected with first transmission rod 12, first transmission rod 12 cylindrical surface upper and lower ends are respectively fixedly connected with sliding sleeve 16, sliding sleeve 16 inner side is slidably connected with right angle trapezoidal block 13, different height right angle trapezoidal block 13 is reverse setting, right angle trapezoidal block 13 right angle end fixedly connected with spring 15, spring 15 is located in sliding sleeve 16 inner side, spring 15 far away from right angle trapezoidal block 13 one end and first transmission rod 12 fixedly connected, right angle trapezoidal block 13 oblique end and ratchet 14 meshing sliding connection.

[0029] The top end of the stirring tank 7 is fixedly connected with the hydraulic push rod 8, the hydraulic push rod 8 is slidably connected with the box 1, the hydraulic push rod 8 is fixedly connected with the lifting plate 4, the motor 5 power output end is fixedly connected with the second transmission rod 18, the second transmission rod 18 is rotatably connected with the stirring tank 7, a plurality of stirring plates 19 are fixedly connected with the second transmission rod 18, the plurality of stirring plates 19 are slidably attached to the inner wall of the stirring tank 7, the plurality of stirring plates 19 are arranged in a circular array, the second transmission rod 18 is fixedly connected with the scraping plate 20, the scraping plate 20 is in a cross structure, the scraping plate 20 is slidably attached to the inner wall of the stirring tank 7, the second transmission rod 18 is fixedly connected with the sealing ring 21, the sealing ring 21 is slidably engaged with the bottom opening of the stirring tank 7, the sealing ring 21 is fixedly connected with the extrusion screw 17, and the extrusion screw 17 is rotatably connected with the inner wall of the feed pipe 24.

[0030] The working principle of the embodiment is as follows:

[0031] The user fills the printing material into the stirring tank 7 through the feeding port 6, and then starts the motor 5, which drives the second transmission rod 18 inside the stirring tank 7 to rotate. In the process, the stirring plate 19 in the middle of the second transmission rod 18 continuously stirs the material inside the body of the stirring tank 7 to prevent it from solidifying, and the scraper 20 at the bottom of the second transmission rod 18 continuously scrapes the material adhered to the inner wall to reduce the residue and waste of the material. When the extrusion device moves to the printing position, the hydraulic push rod 8 can lift the motor 5 so that the second transmission rod 18 is lifted, the sealing ring 21 is away from the opening at the bottom end of the stirring tank 7, and the continuously rotating extrusion screw 17 sends the material in the tank into the feeding pipe 24. In the process, since the ratchet and pawl mechanism is arranged inside the transmission gear 10 driven by the top gear 23 of the rotating pipe 2, the transmission gear 10 cannot be reversed during rotation, thereby ensuring the stability and reliability of the entire rotating mechanism. Since the ratchet structures of the two transmission gears 10 are opposite, when the servo motor 5 rotates in one direction, only one transmission gear 10 can be driven to rotate, which greatly simplifies the transmission connection and further improves the stability and service life of the entire rotating mechanism. Therefore, when the servo motor 9 rotates clockwise, only the bottom transmission gear 10 can be driven to rotate. Since the bottom transmission gear 10 is in meshing transmission with the driven gear 23 on the surface of the rotating pipe 2, the rotating pipe 2 is driven to rotate and adjust the position. Similarly, when the servo motor 9 rotates counterclockwise, only the top transmission gear 10 can be driven to rotate. Since the top transmission gear 10 is in meshing transmission with the driven gear 23 on the surface of the feeding pipe 24, the feeding pipe 24 is driven to rotate. Through the transmission design of the L-shaped rod 26 and the transmission disc 25, the bottom shaping sleeve 3 of the discharge pipe 22 is driven to rotate, the jet plane angle and direction are adjusted, and the printing port cannot reach the specified position for printing operation due to the collision between the structure of the extrusion mechanism and the obstacle. Therefore, the flexibility of the device is improved, the printing effect is optimized, and the printing efficiency is greatly improved.

[0032] The above merely describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application.

Claims

1. An extrusion device for a building 3D printer, comprising a housing (1), characterized in that: The bottom end of the box body (1) is rotatably connected to a rotating tube (2), and a shaping sleeve (3) is installed at one end of the rotating tube (2) away from the box body (1). The top end of the box body (1) is slidably connected to a lifting plate (4), and the top end of the lifting plate (4) is fixedly connected to a motor (5). The inside of the box body (1) is fixedly connected to a stirring tank (7), and one side of the stirring tank (7) is fixedly connected to the box body (1) with a feed port (6), and a rotating mechanism is provided inside the rotating tube (2).

2. The extrusion device of a building 3D printer according to claim 1, characterized in that: The rotating mechanism comprises a discharge pipe (22), a feed pipe (24) and a delivery pipe (28), wherein the discharge pipe (22), the feed pipe (24) and the delivery pipe (28) are all located inside the rotating pipe (2) and are rotationally connected to the rotating pipe (2), the feed pipe (24) is rotationally connected to the connecting end of the rotating pipe (2) and the box body (1), and the outer side of one end of the rotating pipe (2) connected to the box body (1) and the outer side of the through end of the feed pipe (24) are respectively fixedly connected with a driven gear (23).

3. The extrusion device of a building 3D printer according to claim 2, characterized in that: The feed pipe (24) and the delivery pipe (28) and the delivery pipe (28) and the discharge pipe (22) are respectively fixedly connected with transmission discs (25) at their respective ends close to each other, a plurality of the transmission discs (25) are fixedly connected with connecting hoses (27), a plurality of L-shaped rods (26) are provided between the plurality of the transmission discs (25), one end of the L-shaped rod (26) is slidably connected to one of the transmission discs (25), and the other end of the L-shaped rod (26) is slidably connected to the other transmission disc (25), and the end of the discharge pipe (22) away from the delivery pipe (28) is slidably connected to the shaping sleeve (3).

4. The extrusion device of a building 3D printer according to claim 2, characterized in that: One side of the two driven gears (23) is respectively connected to a transmission gear (10), and ratchet teeth (14) are provided inside the two transmission gears (10). The ratchet teeth (14) provided inside the two transmission gears (10) are provided in opposite directions. A fixed frame (11) is rotatably connected between the transmission gears (10), and the fixed frame (11) is fixedly connected to the inner wall of the box body (1). The top of the fixed frame (11) is fixedly connected to a servo motor (9), and the power output end of the servo motor (9) is fixedly connected to a first transmission rod (12). The upper and lower ends of the cylindrical surface of the first transmission rod (12) are respectively fixedly connected with a sliding sleeve (16), the inner side of the sliding sleeve (16) is slidably connected with a right-angled trapezoidal block (13), and the right-angled trapezoidal blocks (13) of different heights are arranged in reverse. The right-angled end of the right-angled trapezoidal block (13) is fixedly connected with a spring (15), and the spring (15) is located inside the sliding sleeve (16). The end of the spring (15) away from the right-angled trapezoidal block (13) is fixedly connected to the first transmission rod (12), and the inclined end of the right-angled trapezoidal block (13) is meshed and slidably connected with the ratchet (14).

5. The extrusion device of a building 3D printer according to claim 1, characterized in that: The top of the mixing tank (7) is fixedly connected to a hydraulic push rod (8), the telescopic end of the hydraulic push rod (8) is slidably connected to the box body (1), the telescopic end of the hydraulic push rod (8) is fixedly connected to the lifting plate (4), the power output end of the motor (5) is fixedly connected to a second transmission rod (18), and the second transmission rod (18) is rotatably connected to the inside of the mixing tank (7).

6. The extrusion device of a building 3D printer according to claim 5, characterized in that: A plurality of stirring plates (19) are fixedly connected to the circumferential surface of the middle portion of the second transmission rod (18), and the outer surfaces of the plurality of stirring plates (19) are in sliding contact with the inner wall of the stirring tank (7). The plurality of stirring plates (19) are arranged in a circumferential array. A scraper (20) is fixedly connected to the bottom surface of the stirring plate (19) of the second transmission rod (18), and the scraper (20) is in a cross structure. The outer surface of the scraper (20) is in sliding contact with the inner wall of the stirring tank (7). A sealing ring (21) is fixedly connected to the bottom end of the second transmission rod (18), and the sealing ring (21) is in sliding engagement with the opening at the bottom end of the stirring tank (7). An extrusion screw (17) is fixedly connected to the middle portion of the bottom end of the sealing ring (21), and the extrusion screw (17) is rotatably connected to the inner wall of the feed pipe (24).

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