A coarse aggregate embedding device and a 3D printing device

Abstract

The present invention discloses a coarse aggregate embedding device and a 3D printing device, comprising a shell, a storage bin for storing coarse aggregate is fixedly connected to the upper end of the shell, a discharge port is opened at the lower end of the storage bin, a feeding mechanism for transporting coarse aggregate is arranged at the upper part of the inner cavity of the shell, a bottom plate is fixedly connected to the bottom plate of the inner cavity of the shell, a servo motor is arranged at the middle part of the lower end of the bottom plate, the servo motor is fixedly connected to the shell, an incomplete gear is fixedly connected to the output end of the servo motor, a rotating rod is rotatably connected to one side of the upper end of the bottom plate, and a driven gear is fixedly connected to the lower outer wall of the rotating rod, that is, when the servo motor rotates clockwise, the output end of the feeding mechanism is driven to gradually move away from the discharge port through the rotating rod. The present invention can realize that when there is coarse aggregate in the inner cavity of the shell, the baffle contacts the driven rod so that the shell can stay above the through hole, thereby causing the coarse aggregate to fall, and the shell without coarse aggregate will directly pass through the through hole without staying.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D architectural printing, in particular to a coarse aggregate embedding device and a 3D printing device. Background Art

[0002] After years of development, 3D architectural printing technology has been successfully applied to the printing engineering applications of general buildings or components. Reinforced concrete is a widely used building material, mainly including cement, fine aggregate, coarse aggregate and steel bars. The printing nozzle is the core component of 3D architectural printing technology. Only when the concrete material is printed out through the nozzle can the three-dimensional arrangement of the concrete be realized through the motion control system of the printer, thereby completing the preparation of the product.

[0003] For example, Chinese patent publication No. CN112536884B discloses a coarse aggregate embedding device and a 3D printer, the coarse aggregate embedding device includes a shell and a roller, the shell defines a accommodating cavity, the accommodating cavity includes a mounting cavity and an aggregate channel, the shell is provided with an inlet and a discharge port, the inlet is connected to the aggregate channel, the discharge port is connected to the mounting cavity and the aggregate channel, the roller is rotatably disposed in the mounting cavity, and a part of the roller extends into the discharge port, the roller can press the coarse aggregate into the interior of the laid cement slurry.

[0004] In this solution, after the coarse aggregate enters the aggregate channel from the inlet, it will fall from the outlet onto the cement slurry after hitting the baffle. However, a large amount of coarse aggregate enters the aggregate channel at one time, and they all fall at the same time. This results in uneven distribution of coarse aggregate on the cement slurry, and the coarse aggregate may even fall off the edge of the cement slurry or fall off the slurry. Summary of the invention

[0005] The purpose of the present invention is to provide a coarse aggregate embedding device and a 3D printing device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A coarse aggregate embedding device comprises a shell, the upper end of the shell is fixedly connected to a storage bin for storing coarse aggregate, the lower end of the storage bin is provided with a discharge port, the upper part of the shell inner cavity is provided with a unloading mechanism for transporting coarse aggregate, the bottom plate of the shell inner cavity is fixedly connected to a bottom plate, a servo motor is provided in the middle part of the lower end of the bottom plate, the servo motor is fixedly connected to the shell, the output end of the servo motor is fixedly connected to an incomplete gear, a rotating rod is rotatably connected to one side of the upper end of the bottom plate, a driven gear is fixedly connected to the lower outer wall of the rotating rod, the driven gear is meshed with the incomplete gear, and the unloading mechanism is arranged on the upper part of the rotating rod, that is, when the servo motor rotates clockwise, the output end of the unloading mechanism will be driven to gradually move away from the discharge port through the rotating rod.

[0008] As a further solution of the present invention: the unloading mechanism includes a first turntable, which is fixedly connected to the upper end of the rotating rod, and a symmetrical first shell is fixedly connected to the upper end of the first turntable. A second turntable is arranged below the first turntable, and the second turntable is movably connected to the rotating rod. The second shell is slidably sleeved on the outer wall of the first shell, and a mounting block is fixedly connected to a side of the lower end of the second shell close to the rotating rod, and a rotating plate is rotatably connected to the middle part of a side of the mounting block away from the rotating rod, and the upper end surface of the rotating plate is fitted with the lower end surface of the second shell, and a push rod is horizontally slidably connected to the middle part of the lower end of the mounting block, and the push rod is fitted with the lower end of the rotating plate.

[0009] As a further solution of the present invention: a guide plate is arranged under the second turntable, the guide plate is movably connected to the turn rod, a slide groove is opened in the middle of the upper end of the guide plate, symmetrical fixing rods are arranged in the slide groove, the upper ends of the symmetrical fixing rods are fixedly connected to the second turntable, the symmetrical fixing rods are slidably connected in the slide groove, a guide groove is opened in the upper end of the guide plate, and the discharge port and the guide groove are located on the same side.

[0010] As a further solution of the present invention: a groove is provided on the side of the upper end of the guide plate away from the guide groove, the groove is communicated with the guide groove, a round rod is fixedly connected to the end of the push rod away from the rotating plate, the round rod is slidably connected in the guide groove and the groove, an electric telescopic push rod is fixedly connected to one side of the lower end of the guide plate, and the lower end of the electric telescopic push rod is fixedly connected to the base plate.

[0011] As a further solution of the present invention: a material distribution mechanism is arranged on one side of the upper end of the bottom plate, and the material distribution mechanism includes a receiving bin, a connecting plate is rotatably connected to the middle part of the lower end of the receiving bin, a plurality of shells are fixedly connected to the outer wall of the connecting plate, and the shells are evenly distributed on the outer wall of the connecting plate, a fixed plate is rotatably connected to the middle part of the lower end of the shell, the lower end of the fixed plate is fixedly connected to the bottom plate, a through hole is opened on the side of the fixed plate away from the rotating rod, a plurality of holes are opened at the bottom of the inner cavity of the receiving bin, and a rotating component is arranged below the fixed plate.

[0012] As a further solution of the present invention: the rotating assembly includes a ratchet, which is rotatably connected to the base plate, a rotating shaft is fixedly connected to the middle of the upper end of the ratchet, the rotating shaft is rotatably connected to the fixed plate, the plane where the top end of the rotating shaft is located exceeds the plane where the bottom of the inner cavity of the receiving bin is located, the rotating shaft is fixedly connected to the middle of the connecting plate, the rotating shaft is rotatably connected to the lower end of the receiving bin, a conical block is fixedly connected to the upper end of the rotating shaft, the lower end of the conical block is rotatably connected to the bottom of the inner cavity of the receiving bin, and a convex rod is fixedly connected to the lower part of the outer wall of the conical block.

[0013] As a further solution of the present invention: a mounting shell is provided on the side of the ratchet close to the rotating rod, and a key is rotatably connected to the side of the mounting shell close to the ratchet. The side of the key away from the ratchet is elastically connected to the inner cavity of the mounting shell through a first spring, and the mounting is fixedly connected to the slider at the lower end of the shell, and an arc groove is opened at the upper end of the bottom plate.

[0014] As a further solution of the present invention: the slider is slidably connected in the arc groove, the end of the slider away from the mounting shell is connected to the side wall of the inner cavity of the arc groove through an arc spring, the side of the mounting shell away from the ratchet is fixedly connected with a blocking rod, the outer wall of the output end of the servo motor is fixedly connected with a driving rod, and the driving rod is located below the incomplete gear.

[0015] As a further solution of the present invention: a through groove is provided on the side of the inner cavity of the shell away from the connecting plate, and a driven rod is rotatably connected to the upper part of the through groove, and the driven rod is an L-shaped rod, which is composed of a vertical rod and a horizontal rod. The upper end of the vertical rod is rotatably connected to the middle part of the inner cavity of the through groove, and a vertical plate is fixedly connected to the side of the upper part of the through groove away from the connecting plate. The vertical plate and the vertical rod are elastically connected by a second spring, and a baffle is fixedly connected to the side of the outer wall of the through hole close to the arc groove, and the vertical distance from the baffle to the shell is less than the length of the horizontal rod.

[0016] A 3D printing device comprises a bracket, which is fixedly connected to the outer wall of a shell, the bracket is located on a side of the outer wall of the shell close to a through hole, a feeding hole is provided on a side of the lower end of the shell close to the bracket, the position of the feeding hole corresponds to the through hole, a pipe is fixedly connected to one end of the bracket away from the shell, a nozzle is fixedly connected to the lower end of the pipe, a cement mixing tank is arranged at one end of the pipe away from the nozzle, the center position of the feeding hole and the center position of the lower end of the nozzle are in the same vertical plane, a pressure rod is fixedly connected to the side of the lower end of the shell close to the feeding hole, the plane where the lower end surface of the pressure rod is located is higher than the plane where the lower end surface of the nozzle is located, and the center position of the pressure rod and the center position of the feeding hole are in the same vertical plane.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By the coordinated use of the first turntable, the second turntable, the first shell and the second shell, the coarse aggregate can be transferred from the storage bin to the top of the receiving bin in a timely and quantitative manner, and the second turntable cooperates with the guide plate through the fixed rod. When the electric telescopic push rod pushes the guide plate to move in the vertical direction, the distance between the top of the second shell and the first turntable can be changed, thereby changing the amount of coarse aggregate transferred. By the coordination of the incomplete gear and the driven gear, the second turntable can be automatically opened after rotating 90°, thereby dropping the coarse aggregate in the second shell into the receiving bin, and the turntable can be automatically closed during the subsequent rotation process. By the coordination of the driven rod and the baffle, when there is coarse aggregate in the inner cavity of the shell, the baffle contacts the driven rod so that the shell can rotate and stay above the through hole under the push of the key and the arc spring, thereby causing the coarse aggregate to fall, while the shell without coarse aggregate inside will directly pass through the through hole without staying under the push, thereby avoiding the situation where the shell without aggregate stays above the through hole and the subsequent coarse aggregate cannot fall in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the shell in the present invention.

[0021] Figure 3 It is a structural schematic diagram of the feeding mechanism in the present invention.

[0022] Figure 4 It is a structural schematic diagram of the guide plate in the present invention.

[0023] Figure 5 For the present invention Figure 2 Schematic diagram of the structure of area A.

[0024] Figure 6 It is a structural schematic diagram of the material distribution mechanism in the present invention.

[0025] Figure 7 It is a structural schematic diagram of the fixing plate in the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the rotating assembly in the present invention.

[0027] Fig. 9 For the present invention Figure 8 Schematic diagram of the structure of area B.

[0028] Fig.10 It is a schematic diagram of the state in which the driven rod contacts the baffle in the present invention.

[0029] Fig.11 Schematic diagram of the state where the driven rod and the baffle are separated in the present invention

[0030] In the figure: 1, shell; 2, storage bin; 3, nozzle; 4, pipeline; 5, bracket; 6, servo motor; 7, incomplete gear; 8, driven gear; 9, rotating rod; 10, unloading mechanism; 101, first rotating disk; 102, second rotating disk; 103, second shell; 104, first shell; 105, guide plate; 106, push rod; 107, round rod; 108, groove; 109, guide groove; 11, unloading hole ; 12. slide groove; 13. fixing rod; 14. mounting block; 15. rotating plate; 16. bottom plate; 17. material distribution mechanism; 171. receiving bin; 172. conical block; 173. connecting plate; 174. outer shell; 175. driven rod; 18. fixing plate; 19. through hole; 20. baffle plate; 21. rotating shaft; 22. ratchet; 23. driving rod; 24. mounting shell; 25. baffle rod; 26. key; 27. arc groove. DETAILED DESCRIPTION

[0031] See also Figure 1-3 In an embodiment of the present invention, a coarse aggregate embedding device includes a shell 1, a storage bin 2 for storing coarse aggregate is fixedly connected to the upper end of the shell 1, a discharge port is opened at the lower end of the storage bin 2, a feeding mechanism 10 for transporting coarse aggregate is arranged at the upper part of the inner cavity of the shell 1, a bottom plate 16 is fixedly connected to the bottom of the inner cavity of the shell 1, a servo motor 6 is arranged at the middle part of the lower end of the bottom plate 16, the servo motor 6 is fixedly connected to the shell 1, an incomplete gear 7 is fixedly connected to the output end of the servo motor 6, a rotating rod 9 is rotatably connected to one side of the upper end of the bottom plate 16, a driven gear 8 is fixedly connected to the lower outer wall of the rotating rod 9, the driven gear 8 is meshed with the incomplete gear 7, and the feeding mechanism 10 is arranged on the upper part of the rotating rod 9, that is, when the servo motor 6 rotates clockwise, the output end of the feeding mechanism 10 will be driven away from the discharge port through the rotating rod 9.

[0032] See also Figure 4-5The unloading mechanism 10 includes a first rotating disk 101, which is fixedly connected to the upper end of the rotating rod 9. A symmetrical first shell 104 is fixedly connected to the upper end of the first rotating disk 101. The first shell 104 is hollow. A second rotating disk 102 is arranged below the first rotating disk 101. The second rotating disk 102 is movably connected to the rotating rod 9. A symmetrical second shell 103 is fixedly connected to the upper end of the second rotating disk 102. The inner diameter of the second shell 103 is the same as the outer wall diameter of the first shell 104, that is, the second shell 103 is slidably sleeved on the outer wall of the first shell 104. The plane where the top of the second shell 103 is located is higher than the plane where the lower end of the first shell 104 is located, and the plane where the lower end of the second shell 103 is located is lower than the plane where the lower end of the second rotating disk 102 is located. A mounting block 14 is fixedly connected to the side of the lower end of the second shell 103 close to the rotating rod 9.The middle part of the side of the mounting block 14 away from the rotating rod 9 is rotatably connected with a rotating plate 15, and the upper end surface of the rotating plate 15 is fitted with the lower end surface of the second shell 103. The middle part of the lower end of the mounting block 14 is horizontally slidably connected with a push rod 106, and the push rod 106 is fitted with the lower end of the rotating plate 15. The push rod 106 provides support for the rotating plate 15 so that the rotating plate 15 can maintain a state of fitting with the second shell 103. When the push rod 106 moves horizontally in the direction of the rotating rod 9, the push rod 106 will gradually move away from the rotating plate 15. When the push rod 106 is separated from the rotating plate 15, the rotating plate 15 loses the support of the push rod 106 and will rotate in the direction of the rotating rod 9 due to its own weight, thereby moving away from the second shell 103. At this time, the coarse aggregate in the second shell 103 will fall, and the second A guide plate 105 is provided below the turntable 102, and the guide plate 105 is movably connected to the turnbar 9. A slide groove 12 is provided in the middle of the upper end of the guide plate 105, and a symmetrical fixing rod 13 is provided in the slide groove 12. The upper ends of the symmetrical fixing rods 13 are fixedly connected to the second turntable 102, and the symmetrical fixing rods 13 are slidably connected in the slide groove 12. A guide groove 109 is provided at the upper end of the guide plate 105, and the discharge port and the guide groove 109 are located on the same side, that is, when the first shell 104 and the second shell 103 rotate to the side where the guide groove 109 is located, the coarse aggregate will fall from the storage bin 2 into the second shell 103 at this time, and a groove 108 is provided on the side of the upper end of the guide plate 105 away from the guide groove 109, and the groove 108 is connected to the guide groove 109. The center position of the groove 108 is closer to the center position of the rotating rod 9 than the center position of the guide groove 109. The end of the push rod 106 away from the rotating plate 15 is fixedly connected with a round rod 107, and the round rod 107 is slidably connected to the guide groove 109 and the groove 108. That is, when the round rod 107 moves from the guide groove 109 to the groove 108, the push rod 106 will move away from the rotating plate 15, so that the coarse aggregate falls from the second shell 103, and through the cooperation of the incomplete gear 7 and the driven gear 8, when the round rod 107 moves to the position of the inner cavity of the groove 108 close to the rotating rod 9, the rotating plate 15 is opened and the incomplete gear 7 loses the ability to drive the driven gear 8 to rotate, thereby keeping the second rotating plate 15 prohibited, so that the coarse aggregate can The guide plate 105 has enough time to fall from the second shell 103. When the round rod 107 moves from the groove 108 to the guide groove 109, the push rod 106 will gradually lift the rotating plate 15 so that the rotating plate 15 can fit with the second shell 103 again, that is, when the round rod 107 is in the guide groove 109, the rotating plate 15 can remain in a state of fitting with the second shell 103. The lower end of the guide plate 105 is fixedly connected to an electric telescopic push rod, and the lower end of the electric telescopic push rod is fixedly connected to the bottom plate 16. The electric telescopic push rod can push the guide plate 105 to move in the vertical direction, thereby changing the distance between the second shell 103 and the first turntable 101, thereby changing the capacity in the second shell 103, and then changing the amount of coarse aggregate transported in a single time.

[0033] See also Figure 6-7 A material distribution mechanism 17 is provided on one side of the upper end of the bottom plate 16. The material distribution mechanism 17 includes a receiving bin 171. The receiving bin 171 is located below the second turntable 102, so that the coarse aggregate dropped in the second shell 103 will enter the receiving bin 171. A connecting plate 173 is rotatably connected to the middle part of the lower end of the receiving bin 171. A plurality of outer shells 174 are fixedly connected to the outer wall of the connecting plate 173. The outer shells 174 are evenly distributed on the outer wall of the connecting plate 173. A fixing plate 18 is rotatably connected to the middle part of the lower end of the outer shell 174. The lower end of the fixing plate 18 is fixedly connected to the bottom plate 16. A through hole 19 is provided on the side of the fixing plate 18 away from the rotating rod 9. The bottom of the inner cavity of the receiving bin 171 is opened. A plurality of holes are provided, the number of the holes is one less than the number of the outer shell 174, that is, no hole is provided at the position corresponding to the through hole 19 at the bottom of the inner cavity of the receiving bin 171, so as to prevent the coarse aggregate from falling directly through the hole located above the through hole, thereby causing the amount of coarse aggregate falling to be uneven, that is, the coarse aggregate entering the inner cavity of the receiving bin 171 can only fall when the outer shell 174 coincides with the position of the through hole 19 after passing through the holes in turn and entering the inner cavity of the outer shell 174. In order to make the plurality of outer shells 174 coincide with the position of the through hole 19 in turn so that the coarse aggregate can fall from the through hole 19 in turn and continuously, a rotating component is provided under the fixed plate 18.

[0034] See also Figure 8-9The rotating assembly includes a ratchet 22, which is rotatably connected to the bottom plate 16, a rotating shaft 21 is fixedly connected to the middle of the upper end of the ratchet 22, and the rotating shaft 21 is rotatably connected to the fixed plate 18. The plane where the top of the rotating shaft 21 is located exceeds the plane where the bottom of the inner cavity of the receiving bin 171 is located, the rotating shaft 21 is fixedly connected to the middle of the connecting plate 173, and the rotating shaft 21 is rotatably connected to the lower end of the receiving bin 171. A conical block 172 is fixedly connected to the upper end of the rotating shaft 21, and the lower end of the conical block 172 is rotatably connected to the bottom of the inner cavity of the receiving bin 171. A convex rod is fixedly connected to the lower part of the outer wall of the conical block 172, and a mounting is provided on the side of the ratchet 22 close to the rotating rod 9. The mounting shell 24 has a side that is rotatably connected to the ratchet 22 and is rotatably connected to a key 26. The side of the key 26 that is away from the ratchet 22 is elastically connected to the inner cavity of the mounting shell 24 through a first spring. The slider is fixedly connected to the lower end of the shell. An arc groove 27 is provided at the upper end of the bottom plate 16. The slider is slidably connected to the arc groove 27. The end of the slider that is away from the mounting shell 24 is connected to the inner cavity side wall of the arc groove 27 through an arc spring. The side of the mounting shell 24 that is away from the ratchet 22 is fixedly connected to a blocking rod 25. The outer wall of the output end of the servo motor 6 is fixedly connected to a driving rod 23. The driving rod 23 is located below the incomplete gear 7. The driving rod 23 is located below the incomplete gear 7. The movable rod 23 will rotate with the output end of the servo motor 6. During the rotation, the driving rod 23 will contact and push the blocking rod 25, so that the mounting shell 24 moves along the arc groove 27 with the slider. During the sliding of the slider, the card key 26 will rotate counterclockwise to move away from the ratchet 22. Since the slider moves in the arc groove 27, the blocking rod 25 will gradually move away from the driving rod 23. After the blocking rod 25 is separated from the driving rod 23, the arc spring will reset, thereby pushing the mounting shell 24 to move, and then pushing the ratchet 22 to rotate through the card block. When the conical block 172 rotates with the rotating shaft 21 In the process, the convex rod will be driven to rotate, and the convex rod will continuously push the coarse aggregate into the receiving bin 171, and can prevent the coarse aggregate from piling up while promoting the coarse aggregate to enter the inner cavity of the shell 174, thereby reducing the probability of no coarse aggregate in the inner cavity of the shell 174. Because the shell 174 is always rotating with the ratchet 22, it is inevitable that some of the inner cavities of the shell 174 have rotated to the top of the through hole 19 before the coarse aggregate is filled. In order to prevent the unfilled shell 174 from staying above the through hole 19 and the coarse aggregate cannot fall continuously, a through groove is opened on the side of the inner cavity of the shell 174 away from the connecting plate 173.

[0035] See also Figure 10-11The upper part of the through slot is rotatably connected with a driven rod 175, which is an L-shaped rod, consisting of a vertical rod and a horizontal rod. The upper end of the vertical rod is rotatably connected to the middle part of the through slot inner cavity. A vertical plate is fixedly connected to the side of the upper part of the through slot away from the connecting plate 173. The vertical plate and the vertical rod are elastically connected by a second spring. The second spring can make the driven rod 175 located in the inner cavity of the shell 174 when there is no coarse aggregate in the inner cavity of the shell 174. When the inner cavity of the shell 174 is filled with coarse aggregate, the driven rod 175 will move toward the inner cavity of the shell 174 under the pressure of the coarse aggregate. The second spring is compressed, the vertical rod remains in a vertical state and the horizontal rod remains in a horizontal state. At this time, when the housing 174 rotates, the horizontal rod extends out of the housing 174, and the baffle 20 is fixedly connected to the side of the outer wall of the through hole 19 close to the arc groove 27. The vertical distance between the baffle 20 and the housing 174 is less than the length of the horizontal rod. That is, when the key 26 pushes the ratchet 22 to drive the housing 174 to rotate, the horizontal rod extends out of the housing 174 due to the extrusion of the coarse aggregate, so that The horizontal rod contacts the baffle 20 during the rotation process, and because the ratchet 22 rotates under the action of the rebound force of the arc spring, the ratchet 22 stops rotating after the horizontal rod contacts the baffle 20. At this time, the coarse aggregate can fall from the through hole 19 and finally fall into the cement slurry. After the coarse aggregate leaves the inner cavity of the shell 174, the driven rod 175 is pushed by the rebound force of the second spring and rotates to the inner cavity of the shell 174 again. At this time, the ratchet 22 can rotate, and the driving rod 23 will also continuously contact with the ratchet 22. The baffle plate 20 contacts, thereby compressing the arc spring, so that the ratchet 22 can continue to rotate under the rebound force of the arc spring, and if there is no coarse aggregate in the inner cavity of the shell 174, then the corresponding follower rod 175 will always be located in the inner cavity of the shell 174, so that the shell 174 without coarse aggregate cannot stay above the through hole 19, but will rotate quickly to pass over the through hole 19, thus avoiding the situation where each of the several shells 174 stays above the through hole 19 and causes uneven coarse aggregate feeding intervals.

[0036] A 3D printing device includes a bracket 5, the bracket 5 is fixedly connected to the outer wall of a shell 1, the bracket 5 is located on a side of the outer wall of the shell 1 close to a through hole 19, a feeding hole 11 is provided on a side of the lower end of the shell 1 close to the bracket 5, and the position of the feeding hole 11 corresponds to the through hole 19, a pipe 4 is fixedly connected to one end of the bracket 5 away from the shell 1, a nozzle 3 is fixedly connected to the lower end of the pipe 4, a cement mixing tank (not shown in the figure) is arranged at one end of the pipe 4 away from the nozzle 3, cement is mixed into cement slurry in the cement mixing tank, and is transported to the nozzle 3 through the pipe 4, and finally through the nozzle 3 evenly sprays the cement slurry, the center position of the feeding hole 11 and the center position of the lower end of the nozzle 3 are in the same vertical plane, that is, the coarse aggregate coming out of the feeding hole 11 will fall into the middle of the cement slurry, and a pressure rod is fixedly connected to one side of the lower end of the shell 1 close to the feeding hole 11, the plane where the lower end surface of the pressure rod is located is higher than the plane where the lower end surface of the nozzle 3 is located, and the center position of the pressure rod and the center position of the feeding hole 11 are in the same vertical plane, and the coarse aggregate falling on the surface of the cement slurry can be pressed into the inside of the cement slurry by the pressure rod, so that the coarse aggregate can be better combined with the cement slurry.

Claims

1. A coarse aggregate embedding device, comprising a housing, characterized in that: A storage bin for storing coarse aggregate is fixedly connected to the upper end of the shell, a discharge port is opened at the lower end of the storage bin, a feeding mechanism for transporting coarse aggregate is arranged at the upper part of the inner cavity of the shell, a bottom plate is fixedly connected to the bottom plate of the inner cavity of the shell, a servo motor is arranged at the middle part of the lower end of the bottom plate, the servo motor is fixedly connected to the shell, an incomplete gear is fixedly connected to the output end of the servo motor, a rotating rod is rotatably connected to one side of the upper end of the bottom plate, a driven gear is fixedly connected to the lower outer wall of the rotating rod, the driven gear is meshed with the incomplete gear, and the feeding mechanism is arranged at the upper part of the rotating rod, that is, when the servo motor rotates clockwise, the output end of the feeding mechanism will be driven to gradually move away from the discharge port through the rotating rod; A material distribution mechanism is provided at one side of the upper end of the bottom plate, and the material distribution mechanism includes a receiving bin, a connecting plate is rotatably connected to the middle of the lower end of the receiving bin, a plurality of shells are fixedly connected to the outer wall of the connecting plate, and the shells are evenly distributed on the outer wall of the connecting plate, a fixing plate is rotatably connected to the middle of the lower end of the shell, and the lower end of the fixing plate is fixedly connected to the bottom plate, a through hole is provided on the side of the fixing plate away from the rotating rod, a plurality of holes are provided at the bottom of the inner cavity of the receiving bin, and a rotating component is provided below the fixing plate; A through slot is provided on a side of the inner cavity of the shell away from the connecting plate, and a driven rod is rotatably connected to the upper part of the through slot, and the driven rod is an L-shaped rod, which is composed of a vertical rod and a horizontal rod. The upper end of the vertical rod is rotatably connected to the middle part of the inner cavity of the through slot, and a vertical plate is fixedly connected to the side of the upper part of the through slot away from the connecting plate, and the vertical plate and the vertical rod are elastically connected by a second spring, and a baffle is fixedly connected to the side of the outer wall of the through hole close to the arc slot, and the vertical distance from the baffle to the shell is less than the length of the horizontal rod.

2. A coarse aggregate embedding device according to claim 1, characterized in that: The unloading mechanism includes a first turntable, which is fixedly connected to the upper end of a rotating rod, a symmetrical first shell is fixedly connected to the upper end of the first turntable, a second turntable is arranged below the first turntable, the second turntable is movably connected to the rotating rod, the second shell is slidably sleeved on the outer wall of the first shell, a mounting block is fixedly connected to a side of the lower end of the second shell close to the rotating rod, a rotating plate is rotatably connected to the middle part of a side of the mounting block away from the rotating rod, the upper end surface of the rotating plate is fitted with the lower end surface of the second shell, a push rod is horizontally slidably connected to the middle part of the lower end of the mounting block, and the push rod is fitted with the lower end of the rotating plate.

3. A coarse aggregate embedding device according to claim 2, characterized in that: A guide plate is arranged below the second turntable, and the guide plate is movably connected to the turn rod. A slide groove is provided in the middle of the upper end of the guide plate, and symmetrical fixing rods are arranged in the slide groove. The upper ends of the symmetrical fixing rods are fixedly connected to the second turntable, and the symmetrical fixing rods are slidably connected in the slide groove. A guide groove is provided in the upper end of the guide plate, and the discharge port and the guide groove are located on the same side.

4. A coarse aggregate embedding device according to claim 3, characterized in that: A groove is provided on the side of the upper end of the guide plate away from the guide groove, and the groove is communicated with the guide groove. A round rod is fixedly connected to the end of the push rod away from the rotating plate, and the round rod is slidably connected to the guide groove and the groove. An electric telescopic push rod is fixedly connected to one side of the lower end of the guide plate, and the lower end of the electric telescopic push rod is fixedly connected to the bottom plate.

5. A coarse aggregate embedding device according to claim 1, characterized in that: The rotating assembly includes a ratchet, which is rotatably connected to the base plate, a rotating shaft is fixedly connected to the middle of the upper end of the ratchet, the rotating shaft is rotatably connected to the fixed plate, the plane where the top end of the rotating shaft is located exceeds the plane where the bottom of the inner cavity of the receiving bin is located, the rotating shaft is fixedly connected to the middle of the connecting plate, the rotating shaft is rotatably connected to the lower end of the receiving bin, a conical block is fixedly connected to the upper end of the rotating shaft, the lower end of the conical block is rotatably connected to the bottom of the inner cavity of the receiving bin, and a convex rod is fixedly connected to the lower part of the outer wall of the conical block.

6. A coarse aggregate embedding device according to claim 5, characterized in that: A mounting shell is provided on the side of the ratchet wheel close to the rotating rod, and a clamping key is rotatably connected to the side of the mounting shell close to the ratchet wheel. The side of the clamping key away from the ratchet wheel is elastically connected to the inner cavity of the mounting shell through a first spring. The mounting shell is fixedly connected to a sliding block at the lower end of the shell, and an arc groove is provided at the upper end of the bottom plate.

7. A coarse aggregate embedding device according to claim 6, characterized in that: The slider is slidably connected in the arc groove, and the end of the slider away from the mounting shell is connected to the side wall of the inner cavity of the arc groove through an arc spring. A blocking rod is fixedly connected to the side of the mounting shell away from the ratchet wheel, and a driving rod is fixedly connected to the outer wall of the output end of the servo motor, and the driving rod is located below the incomplete gear.

8. A 3D printing device, comprising a coarse aggregate embedding device according to any one of claims 1 to 7, characterized in that: It also includes a bracket, which is fixedly connected to the outer wall of the shell, and the bracket is located on a side of the outer wall of the shell close to the through hole. A feeding hole is opened on the side of the lower end of the shell close to the bracket, and the position of the feeding hole corresponds to the through hole. A pipe is fixedly connected to the end of the bracket away from the shell, and a nozzle is fixedly connected to the lower end of the pipe. A cement mixing tank is arranged at the end of the pipe away from the nozzle, and the center position of the feeding hole and the center position of the lower end of the nozzle are in the same vertical plane. A pressure rod is fixedly connected to the side of the lower end of the shell close to the feeding hole, and the plane where the lower end surface of the pressure rod is located is higher than the plane where the lower end surface of the nozzle is located, and the center position of the pressure rod and the center position of the feeding hole are in the same vertical plane.

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