Multi-nozzle modular switching mechanism

Abstract

The invention discloses a multi-nozzle modular switching mechanism, and relates to the technical field of 3D printing nozzles. The spray head module and the color storage tank module are arranged in the machine box and distributed in the front-back direction, and the spray head module comprises a steering support and a spray head structure annularly arranged on the steering support; the color storage tank module comprises a transmission frame body and a color storage tank body which is annularly arranged on the transmission frame body and is used for storing printing pigments with different colors; and the fork-shaped driving arm assembly is arranged between the color storage tank module and the spray head module. Through the action of the fork-shaped driving arm assembly, the mode that the transmission frame body rotates synchronously and intermittently relative to the steering support is adopted, switching of the spray head structure and the color storage tank body at the printing position of the opening of the machine box is achieved, therefore, multi-color and multi-material mixed printing is achieved, operation is easy, and accurate printing is guaranteed through the spray head structure in the perpendicular state all the time.

Description

Technical Field

[0001] This invention relates to the field of 3D printing nozzle technology, specifically a multi-nozzle modular switching mechanism. Background Technology

[0002] A 3D printer is a device that creates three-dimensional objects by depositing materials layer by layer. It rapidly transforms virtual designs into physical objects based on digital model files. This technology is also known as additive manufacturing, which contrasts sharply with traditional subtractive manufacturing (such as machining). However, to achieve multi-color printing, a 3D printer is often equipped with two or more extrusion nozzles to match different color canisters, making each change inconvenient. Furthermore, the nozzle angle needs to be kept downwards. Therefore, a modular multi-nozzle switching mechanism is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-nozzle modular switching mechanism. Through the action of the fork-shaped drive arm assembly, the transmission frame rotates synchronously and intermittently relative to the steering bracket, thereby realizing the switching of the nozzle structure and color tank at the printing position of the machine opening. This enables mixed printing of multiple colors and materials, and the operation is simple. The nozzle structure, which is always in a vertical state, also ensures accurate printing.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-nozzle modular switching mechanism, comprising: a chassis; a nozzle module and a color tank module disposed within the chassis and distributed at the front and rear, wherein the nozzle module includes a steering bracket and a nozzle structure annularly disposed on the steering bracket, and under the action of the steering bracket, the nozzle structures always remain in a vertical state; the color tank module includes a transmission frame and a color tank annularly disposed on the transmission frame for storing printing pigments of different colors; and a fork-shaped drive arm assembly disposed between the color tank module and the nozzle module, which, under the action of the fork-shaped drive arm assembly, can drive the transmission frame to rotate synchronously and intermittently relative to the steering bracket and switch the color tank and nozzle structure corresponding to the printing position of the chassis opening, thereby realizing the corresponding switching of the nozzle and the spraying color.

[0005] Preferably, the transmission frame includes a first mounting plate fixed to one side of the chassis, a first mounting assembly extending into the chassis being fixed to the lower part of the first mounting plate; and a frame body rotatably mounted on the first mounting assembly, wherein the color storage tank is mounted at the end of the frame body.

[0006] Preferably, each of the color storage tanks includes a storage tank disposed at the end of the frame body, the storage tank being provided with a storage bucket communicating therewith; and a docking part and a discharge port respectively disposed on the storage bucket, wherein the discharge port is provided with a control valve and can be docked with the nozzle structure, and the docking part can be docked with the fork-shaped drive arm assembly and used to drive the opening and closing of the control valve.

[0007] Preferably, the fork-shaped drive arm assembly includes a fixed rod fixed inside the first assembly and passing through the middle of the frame body; a U-shaped frame rotatably mounted on the fixed rod at the end away from the first assembly, the U-shaped frame having a telescopic support rod inside; and an elongated groove formed inside the telescopic support rod, wherein the fixed rod is slidably connected to the elongated groove; a U-shaped clamp fixed to one end of the telescopic support rod, the U-shaped clamp having docking blocks at both ends, wherein the docking blocks dock with docking parts; and a protrusion annularly fixed to the frame body and corresponding to a plurality of color storage tanks, the protrusion being able to be embedded inside the U-shaped clamp; and a swing arm structure for driving the telescopic support rod to slide inside the U-shaped frame, so as to realize that the U-shaped clamp moves the protrusions one by one and completes the intermittent rotation of the frame body.

[0008] Preferably, the swing arm structure includes a fixing sleeve disposed at one end of the fixing rod near the U-shaped frame, the fixing sleeve being provided with a fixing ring; and a fixing plate disposed on the fixing ring, wherein a first motor is fixed at one end of the fixing plate away from the fixing ring, and the telescopic end of the first motor passes through a first through hole opened on the fixing plate and is fixed with a swing rod, and a positioning shaft disposed at one end of the swing rod away from the first motor is rotatably mounted to one end of the telescopic support rod near the U-shaped clamp.

[0009] Preferably, the steering bracket includes a second mounting plate fixed to the other side of the chassis, with a second mounting sleeve fixed to one end of the second mounting plate; a first bracket rotatably mounted on the end of the second mounting sleeve away from the second mounting plate; and a second bracket rotatably mounted on the fixed sleeve, wherein the second bracket and the first bracket are offset from each other; and also includes a second motor mounted on the second mounting plate, with the output end of the second motor passing through a second through hole in the second mounting plate, the second mounting sleeve, and fixed to the first bracket in sequence.

[0010] Preferably, each nozzle structure includes a rotating shaft rotatably mounted on opposite ends of the first bracket and the second bracket and distributed vertically; an assembly frame rotatably mounted between the two rotating shafts, wherein an assembly column is provided in the assembly frame and a flow transfer cavity is opened on the upper part of the assembly column; a connecting pipe and a nozzle body are provided on the assembly column and communicate with the inlet and outlet of the flow transfer cavity respectively, wherein the outlet end of the nozzle body faces downward; a connecting pipe that connects to the discharge port is installed on the top of the connecting pipe; a telescopic pipe is provided on the connecting pipe near one end of the connecting pipe; and an electric telescopic rod is provided on one side of the U-shaped clamp, wherein a limiting frame that matches and engages with the telescopic pipe is fixed at the telescopic end of the connecting pipe.

[0011] Preferably, the assembly column is further provided with a slide rail, the slide rail having a slider; and a first vertical plate fixed on the slider; and a second vertical plate fixed on the side of the slide rail near the assembly column, with a spring connecting the second vertical plate and the first vertical plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The chassis of this invention is a box structure with an opening at the bottom side. The printhead module and the color tank module are respectively installed on the front and rear sides of the chassis. The fork-shaped drive arm assembly is located between the printhead module and the color tank module. It is used to drive the color tank module to switch synchronously and intermittently relative to the printhead module, so as to realize the synchronous switching of the printhead and the color tank, meet the needs of multi-color printing operation, and this device does not require special replacement of the printhead. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the side view structure; Figure 3 This is a schematic diagram of the cross-sectional structure of AA; Figure 4 This is a schematic diagram of the cross-sectional structure of BB; Figure 5 This is a first-person perspective 3D structural diagram of the internal structure of the chassis. Figure 6 This is a second-view, three-dimensional structural diagram of the internal structure of the chassis. Figure 7 A third-person perspective 3D structural diagram of the internal structure of the chassis; Figure 8 for Figure 7 A partially enlarged structural diagram; Figure 9 This is a front view structural diagram of the internal structure of the chassis; Figure 10 This is a disassembled structural diagram of the fork-shaped drive arm assembly.

[0014] In the diagram: 111, Chassis; 112, First Assembly Plate; 113, Assembly Hole; 114, First Assembly Piece; 115, Frame Body; 116, Storage Tank; 117, Storage Bucket; 118, Fixing Rod; 119, U-Shaped Frame; 120, Telescopic Rod; 121, Long Slot; 122, U-Shaped Clamp; 123, Protrusion; 124, Fixing Sleeve; 125, Fixing Ring; 126, Fixing Plate; 127, First Motor; 128, Swing Rod; 129, Positioning Shaft; 130, Connecting Block; 131, Connecting Part; 132, Discharge Port; 211. Second assembly piece; 212. First bracket; 213. Second bracket; 214. Second assembly plate; 215. Second motor; 216. Assembly frame; 217. Assembly column; 218. Nozzle body; 219. Connecting pipe; 220. Connecting pipe; 221. Telescopic pipe; 222. Electric telescopic rod; 223. Limiting frame; 224. Slide rail; 225. Slider; 226. First vertical plate; 227. Second vertical plate; 228. Spring. Detailed Implementation

[0015] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The various embodiments of this invention are described in detail below with reference to the accompanying drawings.

[0016] Example 1 Please see Figures 1 to 10 The present invention preferably provides a technical solution: a multi-nozzle modular switching mechanism, comprising: a housing 111; a nozzle module and a color tank module disposed within the housing 111 and distributed at the front and rear, wherein the nozzle module includes a steering bracket and a nozzle structure annularly disposed on the steering bracket, and under the action of the steering bracket, the nozzle structures always remain in a vertical state; the color tank module includes a transmission frame and a color tank annularly disposed on the transmission frame for storing printing pigments of different colors; and a fork-shaped drive arm assembly disposed between the color tank module and the nozzle module, which, under the action of the fork-shaped drive arm assembly, can drive the transmission frame to rotate synchronously and intermittently relative to the steering bracket and switch the color tank and nozzle structure corresponding to the printing position of the opening of the housing 111, thereby realizing the corresponding switching of the nozzle and the spraying color.

[0017] like Figure 1 , 2As shown, the chassis 111 in this embodiment is a box structure with an opening at the bottom side. The printhead module and the color tank module are respectively installed on the front and rear sides of the chassis 111. The fork-shaped drive arm assembly is set between the printhead module and the color tank module, and is used to drive the color tank module to switch synchronously and intermittently relative to the printhead module, so as to realize the synchronous switching of the printhead and the color tank, meet the multi-color printing operation, and this device does not require special replacement of the printhead. Specific combination Figure 3-7 As shown, the nozzle module consists of a steering bracket and nozzle structures, with the steering bracket ensuring that the nozzle structures remain vertical at all times. The color tank module consists of a transmission frame and a color tank ring-shaped on the transmission frame. When the fork-shaped drive arm assembly is running, as shown... Figure 7 As shown, the transmission frame can be rotated intermittently to switch the ink tank located at the printing position of the opening of the chassis 111. The steering bracket where the printhead module is located simultaneously drives several printhead structures that are always in a vertical state to switch positions with several ink tanks. At the same time, the printhead structure and ink tank at the printing position of the opening of the chassis 111 are simultaneously connected to realize the flow of ink for printing.

[0018] Example 2 In another embodiment of the present invention, the transmission frame includes a first mounting plate 112 fixed to one side of the housing 111, a first mounting bracket 114 extending into the housing 111 fixed to the lower part of the first mounting plate 112; and a frame body 115 rotatably mounted on the first mounting bracket 114, wherein the color storage tank is mounted at the end of the frame body 115; further, each color storage tank includes a storage tank 116 disposed at the end of the frame body 115, and a storage bucket 117 communicating with it is disposed on the storage tank 116; and a docking part 131 and a discharge port 132 respectively disposed on the storage bucket 117, wherein the discharge port 132 is provided with a control valve and can dock with the nozzle structure, and the docking part 131 can dock with the fork-shaped drive arm assembly and is used to drive the opening and closing of the control valve.

[0019] In this embodiment, the color storage tanks are preferably arranged in six groups in a ring on the frame body 115. The frame body 115 is rotatably installed with the first assembly 114. The storage tank 116 where each color storage tank is located is fixed to the back side of one end of the frame body 115. The storage bucket 117 is fixed to the front side of the storage tank 116 and communicates with the storage tank 116. At the same time, each storage bucket 117 is provided with a connecting part 131 and a discharge port 132. Figure 4 , 5 As shown, the docking part 131 can dock with the fork-shaped drive arm assembly, and the discharge port 132 is equipped with a control valve and can dock with the nozzle structure to realize timely supply of pigment. This design allows unused nozzles to shut off the supply of pigment, avoiding material backflow or leakage.

[0020] Example 3 In another embodiment of the present invention, the fork-shaped drive arm assembly includes a fixed rod 118 fixed inside the first mounting bracket 114 and passing through the middle of the frame body 115; a U-shaped frame 119 rotatably mounted on the fixed rod 118 at the end away from the first mounting bracket 114, the U-shaped frame 119 having a telescopic support rod 120 inside; and an elongated groove 121 formed inside the telescopic support rod 120, wherein the fixed rod 118 is slidably connected to the elongated groove 121; and a U-shaped clamp fixed to one end of the telescopic support rod 120. 122, the U-shaped clamp 122 is provided with docking blocks 130 at both ends, wherein the docking blocks 130 dock with the docking parts 131; and the protrusions 123 are fixed in a ring on the frame body 115 and correspond one-to-one with a number of color storage tanks, the protrusions 123 can be embedded inside the U-shaped clamp 122; it also includes a swing arm structure for driving the telescopic support rod 120 to slide inside the U-shaped frame 119, so as to realize that the U-shaped clamp 122 moves the protrusions 123 one by one and completes the intermittent rotation of the frame body 115; Furthermore, the swing arm structure includes a fixed sleeve 124 located at one end of the fixed rod 118 near the U-shaped frame 119, and a fixed ring 125 is provided on the fixed sleeve 124; and a fixed plate 126 located on the fixed ring 125, wherein a first motor 127 is fixed at one end of the fixed plate 126 away from the fixed ring 125, and the telescopic end of the first motor 127 passes through a first through hole opened on the fixed plate 126 and is fixed with a swing rod 128, and a positioning shaft 129 located at one end of the swing rod 128 away from the first motor 127 is rotatably mounted to one end of the telescopic support rod 120 near the U-shaped clamp 122.

[0021] Combination Figure 8 , 10 As shown, the U-shaped frame 119 is rotatably installed with the fixed rod 118, while the telescopic support rod 120 can extend and retract inside the U-shaped frame 119. At the same time, the long slot 121 opened on it is slidably installed with the fixed rod 118, and the U-shaped clamp 122 fixed at its end can engage and move with the annularly fixed protrusion 123 on the frame body 115. The positioning shaft 129 at one end of the swing arm 128 is rotatably mounted with the telescopic support rod 120. Therefore, when the first motor 127, which is fixed to the swing arm 128, is running, the rotating swing arm 128 can push the telescopic support rod 120 to rotate. The swing arm 128 pushes the telescopic support rod 120 to extend and retract inside the U-shaped frame 119, realizing the engagement or disengagement of the U-shaped clamp 122 and the protrusion 123. On the other hand, it causes the U-shaped clamp 122 to push the protrusion 123 to deflect, thereby realizing the intermittent rotation of the frame body 115. Specific combination Figure 7 , 10As shown, when the swing arm 128 rotates clockwise, the telescopic support rod 120 first moves closer to one of the protrusions 123 and makes the U-shaped clamp 122 engage with the protrusion 123. Then, following the clockwise deflection of the swing arm 128, the U-shaped clamp 122 can move the protrusion 123 to deflect. During this process, the frame body 115 completes a certain angle of deflection. Then, following the further clockwise rotation of the swing arm 128, the U-shaped clamp 122 disengages from the protrusion 123. At the same time, the telescopic support rod 120 retracts inside the U-shaped frame 119 and deflects back to the initial position. This process is repeated to realize the switching movement between the nozzle structure and its corresponding color storage tank.

[0022] Example 4 In another embodiment of the present invention, the steering bracket includes a second mounting plate 214 fixed to the other side of the chassis 111, with a second mounting sleeve 211 fixed to one end of the second mounting plate 214; a first bracket 212 rotatably mounted on the end of the second mounting sleeve 211 away from the second mounting plate 214; and a second bracket 213 rotatably mounted on the fixing sleeve 124, wherein the second bracket 213 and the first bracket 212 are offset from each other; and a second motor 215 disposed on the second mounting plate 214, with the output end of the second motor 215 passing through the second through hole opened in the second mounting plate 214, the second mounting sleeve 211, and fixed to the first bracket 212 in sequence.

[0023] Furthermore, each nozzle structure includes rotating shafts respectively rotatably mounted on opposite ends of the first bracket 212 and the second bracket 213 and distributed vertically; an assembly frame 216 rotatably mounted between the two rotating shafts, with an assembly column 217 inside the assembly frame 216 and a flow transfer chamber opened on the upper part of the assembly column 217; a connecting pipe 219 and a nozzle body 218 respectively disposed on the assembly column 217 and connected to the inlet and outlet of the flow transfer chamber, wherein the outlet end of the nozzle body 218 faces downward; a connecting pipe 220 that connects to the discharge port 132 is installed on the top of the connecting pipe 219; a telescopic pipe 221 disposed near one end of the connecting pipe 220 close to the connecting pipe 219; and an electric telescopic rod 222 disposed on one side of the U-shaped clamp 122, wherein a limiting frame 223 that is adapted to and engages with the telescopic pipe 221 is fixed at the telescopic end of the connecting pipe 220.

[0024] Combination Figure 7 , 8As shown in Figure 10, the rotating shafts of the upper and lower parts of the assembly frame 216 are respectively mounted on the opposite ends of the first bracket 212 and the second bracket 213. The first bracket 212 and the second bracket 213 are staggered. Therefore, when the second motor 215 rotates and drives the first bracket 212 to rotate, it can synchronously drive the second bracket 213 to rotate. Due to the ingenious design of the structure, the assembly frame 216, which is respectively set on the opposite ends of the first bracket 212 and the second bracket 213, can always maintain a vertical state. This allows the assembly column 217 on the assembly frame 216 and the nozzle body 218, which is connected to the outlet of the flow chamber opened on the assembly column 217, to synchronously maintain a vertical state. The connecting pipe 219 and the connecting pipe 220, which are connected to the inlet of the diversion chamber, are combined with Figure 4 , 7 As shown in Figure 8, the telescopic tube 221 and the limiting frame 223 are engaged with each other on the rear side of the connecting pipe 220. The limiting frame 223 is connected to the electric telescopic rod 222 of the U-shaped clamp 122. When the U-shaped clamp where the swing arm structure is located extends or retracts, the electric telescopic rod 222 extends or retracts synchronously, causing the limiting frame 223 to engage with the telescopic tube 221. At this time, the telescopic tube 221 can follow the extension and retraction of the U-shaped clamp 122 to achieve the extension and retraction process. At the same time, the U-shaped clamp 122 connects to the slide rail 224 on the storage bucket 117, and the connecting pipe 220 connects to the discharge port 132. When the docking part 131 docks with the docking block 130, the control valve inside the discharge port 132 can be opened synchronously. Then, the pigment inside the storage tank 117 can flow outward through the docking pipe 220, telescopic pipe 221, connecting pipe 219, transfer chamber and nozzle body 218, completing the docking operation of the nozzle structure and the color storage tank at the printing position of the machine box 111, and further realizing the material flow operation at the printing position of the printing position of the machine box 111. Here, the first motor 127 and the second motor 215 work together to maintain the synchronous operation of the nozzle structure and the color storage tank.

[0025] Example 5 In another embodiment of the present invention, the assembly column 217 is also provided with a slide rail 224, the slide rail 224 is provided with a slider 225; and a first vertical plate 226 fixed on the slider 225; and a second vertical plate 227 fixed on the side of the slide rail 224 near the assembly column 217, and a spring 228 is connected between the second vertical plate 227 and the first vertical plate 226.

[0026] In this embodiment, the first vertical plate 226 can contact and support the storage bin 117, combined with Figure 8 As shown, this improves the stability of the storage tank 117 and the nozzle body 218 during intermittent movement.

[0027] Furthermore, the top ends of the first assembly plate 112 and the second assembly plate 214 are respectively provided with assembly holes 113 for assembly with 3D printing equipment.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Detachable installation can take many forms, such as through a combination of plug-in and snap-fit ​​connections, or through bolted connections, etc.

[0029] The foregoing, in conjunction with embodiments and accompanying drawings, has clearly and completely described the concept, specific structure, and resulting technical effects of the present invention, so as to fully understand the purpose, features, and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention. Furthermore, all connections / linkages mentioned herein do not simply refer to direct contact between components, but rather to the possibility of forming a better connection structure by adding or reducing connecting accessories, depending on the specific implementation.

[0030] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A multi-nozzle modular switching mechanism, characterized in that, include: Chassis (111); The nozzle module and the color tank module are installed in the chassis (111) and distributed in front and rear. The nozzle module includes a steering bracket and a nozzle structure arranged in a ring on the steering bracket. Under the action of the steering bracket, the nozzle structure always maintains a vertical state. The color tank module includes a transmission frame and a color tank ring disposed on the transmission frame for storing printing pigments of different colors. The fork-shaped drive arm assembly located between the color tank module and the nozzle module can drive the transmission frame to rotate synchronously and intermittently relative to the steering bracket and switch the color tank and nozzle structure corresponding to the printing position of the opening of the chassis (111), thereby realizing the corresponding switching of the nozzle and the spraying color.

2. The multi-nozzle modular switching mechanism according to claim 1, characterized in that: The transmission frame includes a first mounting plate (112) fixed to one side of the chassis (111), and a first mounting bracket (114) extending into the chassis (111) is fixed to the lower part of the first mounting plate (112). And a frame body (115) rotatably mounted on the first assembly (114), wherein the color storage tank is assembled at the end of the frame body (115).

3. The multi-nozzle modular switching mechanism according to claim 2, characterized in that: Each of the color storage tanks includes a storage tank (116) disposed at the end of the frame body (115), and a storage bucket (117) communicating with the storage tank (116). The material storage tank (117) is equipped with a docking part (131) and a discharge port (132), respectively. The discharge port (132) is equipped with a control valve and can be docked with the nozzle structure. The docking part (131) can be docked with the fork-shaped drive arm assembly and is used to drive the opening and closing of the control valve.

4. The multi-nozzle modular switching mechanism according to claim 2, characterized in that: The fork-shaped drive arm assembly includes a fixing rod (118) fixed inside the first assembly (114) and passing through the middle of the frame body (115). A U-shaped frame (119) is rotatably installed at the end of the fixed rod (118) away from the first assembly (114), and a telescopic support rod (120) is provided inside the U-shaped frame (119). And a long groove (121) opened inside the telescopic support rod (120), wherein the fixed rod (118) is slidably connected to the long groove (121); a U-shaped clamp (122) fixed to one end of the telescopic support rod (120), wherein the two ends of the U-shaped clamp (122) are respectively provided with docking blocks (130), wherein the docking blocks (130) are docked with the docking parts (131); And a ring-shaped protrusion (123) fixed to the frame body (115) and corresponding to a number of color storage tanks, wherein the protrusion (123) can be embedded inside the U-shaped clamp (122); It also includes a swing arm structure for driving the telescopic support rod (120) to slide inside the U-shaped frame (119) so that the U-shaped clamp (122) can move the protrusion (123) one by one and complete the intermittent rotation of the frame body (115).

5. A multi-nozzle modular switching mechanism according to claim 4, characterized in that: The swing arm structure includes a fixing sleeve (124) located at one end of the fixing rod (118) near the U-shaped frame (119), and a fixing ring (125) is provided on the fixing sleeve (124). And a fixing plate (126) provided on the fixing ring (125), wherein a first motor (127) is fixed at one end of the fixing plate (126) away from the fixing ring (125), and the telescopic end of the first motor (127) passes through the first through hole opened on the fixing plate (126) and is fixed with a swing rod (128). The positioning shaft (129) provided at one end of the swing rod (128) away from the first motor (127) is rotatably installed with the telescopic support rod (120) near the U-shaped clamp (122).

6. A multi-nozzle modular switching mechanism according to claim 5, characterized in that: The steering bracket includes a second mounting plate (214) fixed to the other side of the chassis (111), and a second mounting bracket (211) is fixed to one end of the second mounting plate (214). The first bracket (212) is rotatably installed on the end of the second assembly plate (214) away from the second assembly plate (211). And a second bracket (213) rotatably mounted on the fixed sleeve (124), wherein the second bracket (213) is offset from the first bracket (212); It also includes a second motor (215) mounted on the second assembly plate (214), the output end of the second motor (215) passing through the second through hole and the second assembly piece (211) of the second assembly plate (214) and fixed to the first bracket (212).

7. A multi-nozzle modular switching mechanism according to claim 6, characterized in that: Each of the nozzle structures includes a rotating shaft that is rotatably mounted on opposite ends of the first bracket (212) and the second bracket (213) and distributed vertically; A rotating assembly frame (216) is installed between two rotating shafts. An assembly column (217) is provided inside the assembly frame (216), and a flow chamber is opened on the upper part of the assembly column (217). And a connecting pipe (219) and a nozzle body (218) disposed on the assembly column (217) and connected to the inlet and outlet of the transfer chamber respectively, wherein the outlet end of the nozzle body (218) faces downward; The top of the connecting pipe (219) is equipped with a connecting pipe (220) that connects to the discharge port (132). It also includes a telescopic pipe (221) disposed at one end of the connecting pipe (220) near the connecting pipe (219). And an electric telescopic rod (222) provided on one side of the U-shaped clamp (122), wherein the telescopic end of the connecting pipe (220) is fixed with a limiting frame (223) that is compatible with the telescopic pipe (221).

8. A multi-nozzle modular switching mechanism according to claim 7, characterized in that: The assembly column (217) is also provided with a slide rail (224), and a slider (225) is provided inside the slide rail (224). And a first vertical plate (226) fixed on the slider (225); It also includes a second vertical plate (227) fixed on the side of the slide rail (224) near the mounting column (217), and a spring (228) is connected between the second vertical plate (227) and the first vertical plate (226).

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