Complex structure gradient part product forming equipment based on 3D printing

Abstract

The invention discloses complex structure gradient part product forming equipment based on 3D printing, and relates to the technical field of 3D printing product forming. Comprising a mechanical arm and a support plate, a heat processor is fixedly mounted at the tail end of the mechanical arm, a U-shaped frame plate is fixedly mounted on the upper end face of the support plate, a mounting ring is fixedly mounted on the upper end face of the U-shaped frame plate, a U-shaped fixed plate is fixedly mounted on the mounting ring, and a driving assembly is arranged on the U-shaped frame plate and the U-shaped fixed plate. A placing platform is arranged on the driving assembly; a pretreatment assembly is arranged on the support plate, an exhaust nozzle is arranged on the pretreatment assembly, and the driving assembly comprises a mounting plate fixedly mounted on the U-shaped frame plate. Through cooperative use of the driving assembly and the auxiliary assembly, the height of the placing platform can be accurately adjusted, hot air flow can be uniformly distributed, the heat treatment process is automatically controlled, the forming effect of a 3D printing piece is remarkably improved, and the using effect of the equipment is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing product forming, in particular to a complex structure gradient part product forming equipment based on 3D printing. BACKGROUND

[0002] In the field of mechanical engineering and materials science, parts such as gears, bearings, and blades that have direction-dependent performance due to design or manufacturing processes are commonly referred to as "anisotropic parts" or "structure / function gradient parts". 3D printing, also known as additive manufacturing, is a technology that builds three-dimensional objects layer by layer. It is contrary to traditional subtractive manufacturing (such as cutting and carving), which directly generates physical objects from digital models.

[0003] After the product is completely printed using 3D printing, in order to ensure the use effect of the product, the product needs to be heat treated to release these stresses through uniform heating and slow cooling, thereby improving the strength and stability of the part. During the heating process of the product, if the heat flow transmission system (such as nozzles, pipes, etc.) is not reasonably designed or not accurately adjusted, the heat flow may not uniformly cover the entire 3D printed part, resulting in overheating in some areas and insufficient heat in other areas, which ultimately affects the quality of the product. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a complex structure gradient part product forming equipment based on 3D printing, which solves the problems mentioned in the background art.

[0005] To achieve the above purpose, the present application realizes the following technical scheme: A complex structure gradient part product forming equipment based on 3D printing, comprising a mechanical arm and a support plate, a heat treatment device is fixedly installed at the tail end of the mechanical arm, a U-shaped bracket plate is fixedly installed on the upper end surface of the support plate, an installation ring is fixedly installed on the upper end surface of the U-shaped bracket plate, a U-shaped fixed plate is fixedly installed on the installation ring, a driving assembly is arranged on the U-shaped bracket plate and the U-shaped fixed plate, and a placing platform is arranged on the driving assembly. A pretreatment assembly is arranged on the support plate, and an exhaust nozzle is arranged on the pretreatment assembly.

[0006] Preferably, the driving assembly comprises an installation plate fixedly installed on the U-shaped bracket plate, a first motor fixedly installed on the installation plate, a driving gear fixedly installed at the output end of the first motor, a driven gear rotatably installed on the outer side surface of the installation ring, a lifting column fixedly installed on the driven gear, a lifting rod slidably installed in the lifting column, an adjusting column slidably installed on the U-shaped fixed plate, and a threaded hole formed in the bottom end of the adjusting column.

[0007] Preferably, the front surface of the U-shaped frame plate is fixedly provided with a second motor, the output end of the second motor is fixedly provided with a driving rod, the driving rod is fixedly provided with a main bevel gear, the U-shaped frame plate is rotatably provided with an adjusting screw rod, and the bottom end of the adjusting screw rod is fixedly provided with a secondary bevel gear.

[0008] Preferably, the main gear and the driven gear are in the same horizontal plane, the main gear and the driven gear are driven by a chain, the bottom end of the adjusting screw rod extends to the inside of the U-shaped frame plate, the main bevel gear is engaged with the secondary bevel gear, the top end of the adjusting screw rod extends to the inside of the threaded hole, and is screwedly installed with the threaded hole.

[0009] Preferably, the pretreatment assembly comprises a hot fan fixedly installed on the support plate, the output end of the hot fan is fixedly communicated with a shunt pipe, the end of the shunt pipe away from the hot fan is fixedly communicated with a first hose, the outer side of the support plate is fixedly provided with a V-shaped frame plate, the V-shaped frame plate is provided with a lifting sliding groove, the inside of the lifting sliding groove is slidably provided with a lifting sliding block, and the lifting sliding block is fixedly provided with a connecting pipe.

[0010] Preferably, the lifting sliding block is fixedly provided with an L-shaped frame plate, the L-shaped frame plate is fixedly provided with a mounting frame plate, the inside of the mounting frame plate is provided with a limiting arc groove, the inside of the limiting arc groove is slidably provided with a limiting arc block, the limiting arc block is fixedly provided with a circular plate, the outer side of the circular plate is fixedly provided with an auxiliary tooth block, the circular plate is fixedly provided with an L-shaped connecting pipe, and one end of the L-shaped connecting pipe is fixedly communicated with a second hose.

[0011] Preferably, the inner side of the V-shaped frame plate is fixedly provided with a U-shaped tooth plate, the inner side of the U-shaped tooth plate is provided with a first tooth block and a second tooth block arranged in a cross manner, the upper end surface of the main gear is fixedly provided with a lifting screw rod, the lifting screw rod is movably provided with a lifting screw block, the lifting screw block is fixedly provided with a connecting frame rod, and the side end surface of the support plate is fixedly provided with a stabilizing plate.

[0012] Preferably, the shunt pipe is fixedly installed on the V-shaped frame plate, the end of the first hose away from the shunt pipe is fixedly communicated with the connecting pipe, the end of the second hose away from the L-shaped connecting pipe is fixedly communicated with the connecting pipe, the auxiliary tooth block is engaged with the first tooth block and the second tooth block in sequence, the air outlet nozzle is fixedly communicated with the L-shaped connecting pipe, and the end of the connecting frame rod away from the lifting screw block is slidably installed with the lifting sliding block.

[0013] The application provides a complex structure gradient part product forming equipment based on 3D printing. 1. The 3D printed part requiring heat treatment is placed on the placement platform, the main bevel gear on the drive rod is driven to rotate by the second motor, the adjustment lead screw is driven to rotate by the cooperation of the main bevel gear and the auxiliary bevel gear, the cooperation of the adjustment lead screw and the adjustment column, and the cooperation of the lifting column and the lifting rod, so that the height of the placement platform is adjusted, then the heat treatment device is moved to the specified position by the mechanical arm, the 3D printed part is heat treated by the mechanical arm, the driving gear is driven to rotate by the first motor, the chain on the driving gear drives the driven gear to rotate, the adjustment column on the driven gear drives the placement platform to rotate, and the cooperation of the rotatable placement platform and the heat treatment device on the mechanical arm effectively improves the heat treatment effect of the 3D printed part and improves the forming effect of the 3D printed part. 2. When the 3D printed part needs to be heat treated, the hot air flow generated by the starting of the hot fan is transported to the connecting pipe through the first hose on the shunt pipe, and then transported to the L-shaped pipe through the second hose on the connecting pipe. The hot air flow in the L-shaped pipe blows towards the 3D printed part through the exhaust nozzle, and the rotation of the driving gear drives the lifting lead screw to rotate, the lifting block on the lifting lead screw is limited to slide in the lifting sliding groove through the cooperation of the connecting frame rod and the V-shaped frame plate, so that the exhaust nozzle on the U-shaped tooth plate is adjusted in the up-down position, ensuring that the exhaust gas of the exhaust nozzle better contacts the 3D printed part, effectively improving the heat pretreatment effect of the 3D printed part. 3. When the U-shaped tooth plate reciprocatingly rises and falls with the lifting block, the circular plate in the mounting frame plate reciprocates through the cooperation of the auxiliary tooth block and the first tooth block, the second tooth block, and the sliding of the limiting arc block in the limiting arc groove, so that the circular plate reciprocates, and the exhaust nozzle on the L-shaped pipe reciprocates through the reciprocating circular plate, improving the uniform contact of the hot air flow with the 3D printed part, and further improving the forming effect of the 3D printed part.

[0014] 4. The cooperation of the driving assembly and the auxiliary assembly can accurately adjust the height of the placement platform, uniformly distribute the hot air flow, and automatically control the heat treatment process, significantly improving the forming effect of the 3D printed part and greatly improving the use effect of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the structure of the placement platform in the present application; Figure 3 It is a sectional view of the bracket plate in the present application; Figure 4 It is a schematic diagram of the structure of the auxiliary assembly in the present application; Figure 5 It is the structure schematic view of connecting frame rod in the application; Figure 6 It is the structure schematic view of L-shaped frame plate in the application; Figure 7 It is the structure schematic view of V-shaped frame plate in the application; Figure 8 It is the structure schematic view of U-shaped tooth plate in the application.

[0016] In the figure: 1, mechanical arm; 2, support plate; 3, heat processor; 4, U-shaped frame plate; 5, mounting ring; 6, U-shaped fixed plate; 7, placing platform; 8, mounting plate; 9, first motor; 10, driving gear; 11, driven gear; 12, lifting column; 13, lifting rod; 14, adjusting column; 15, threaded hole; 16, second motor; 17, driving rod; 18, main bevel gear; 19, adjusting screw; 20, auxiliary bevel gear; 21, hot air fan; 22, shunt pipe; 23, first hose; 24, V-shaped frame plate; 25, lifting chute; 26, lifting block; 27, connecting pipe; 28, L-shaped frame plate; 29, mounting frame plate; 30, limiting arc groove; 31, circular plate; 32, auxiliary tooth block; 33, L-shaped connecting pipe; 34, second hose; 35, U-shaped tooth plate; 36, first tooth block; 37, second tooth block; 38, lifting screw; 39, lifting screw block; 40, connecting frame rod; 41, stabilizing plate; 42, exhaust nozzle; 43, limiting arc block. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0018] Please refer to Figures 1-8The application discloses a 3D printing-based complex structure gradient part product forming equipment, which comprises a mechanical arm 1 and a support plate 2, a heat processor 3 is fixedly installed at the tail end of the mechanical arm 1, a U-shaped frame plate 4 is fixedly installed at the upper end face of the support plate 2, an installation ring 5 is fixedly installed at the upper end face of the U-shaped frame plate 4, a U-shaped fixed plate 6 is fixedly installed on the installation ring 5, a driving assembly is arranged on the U-shaped frame plate 4 and the U-shaped fixed plate 6, a placing platform 7 is arranged on the driving assembly, the driving assembly comprises an installation plate 8 fixedly installed on the U-shaped frame plate 4, a first motor 9 fixedly installed on the installation plate 8, a driving gear 10 fixedly installed at the output end of the first motor 9, a driven gear 11 rotatably installed on the outer side face of the installation ring 5, a lifting column 12 fixedly installed on the driven gear 11, a lifting rod 13 slidably installed in the lifting column 12, an adjusting column 14 slidably installed on the U-shaped fixed plate 6, a threaded hole 15 formed in the bottom end of the adjusting column 14, a second motor 16 fixedly installed on the front surface of the U-shaped frame plate 4, a driving rod 17 fixedly installed at the output end of the second motor 16, a main bevel gear 18 fixedly installed on the driving rod 17, an adjusting screw 19 rotatably installed on the U-shaped frame plate 4, a secondary bevel gear 20 fixedly installed at the bottom end of the adjusting screw 19, the driving gear 10 and the driven gear 11 are located in the same horizontal plane, the driving gear 10 and the driven gear 11 are driven through a chain, the bottom end of the adjusting screw 19 extends to the inside of the U-shaped frame plate 4, the main bevel gear 18 is engaged with the secondary bevel gear 20, the top end of the adjusting screw 19 extends to the inside of the threaded hole 15 and is threadedly installed in the threaded hole 15, and the mechanical arm 1 is a technology known to those skilled in the art and will not be described in detail here.

[0019] In the embodiment, the 3D printed part needing heat treatment is placed on the placing platform 7, meanwhile, the main bevel gear 18 on the driving rod 17 is driven to rotate by the second motor 16, the adjusting screw 19 is driven to rotate by the cooperation of the main bevel gear 18 and the secondary bevel gear 20, the height of the placing platform 7 is adjusted by the cooperation of the adjusting screw 19 and the adjusting column 14 and the cooperation of the lifting column 12 and the lifting rod 13, then the heat processor 3 is moved to a specified position by the mechanical arm 1, the 3D printed part is heat treated by the mechanical arm 1, meanwhile, the driving gear 10 is driven to rotate by the first motor 9, the driven gear 11 is driven to rotate by the chain on the driving gear 10, the placing platform 7 is driven to rotate by the adjusting column 14 on the driven gear 11, and the heat treatment effect of the 3D printed part is effectively improved by the cooperation of the rotatable placing platform 7 and the heat processor 3 on the mechanical arm 1.

[0020] The bracket plate 2 is provided with a pretreatment assembly, the pretreatment assembly is provided with an exhaust nozzle 42, the pretreatment assembly comprises a hot fan 21 fixedly installed on the bracket plate 2, the output end of the hot fan 21 is fixedly communicated with a shunt pipe 22, one end of the shunt pipe 22 away from the hot fan 21 is fixedly communicated with a first hose 23, the outer side of the bracket plate 2 is fixedly installed with a V-shaped frame plate 24, the V-shaped frame plate 24 is provided with a lifting sliding groove 25, the lifting sliding groove 25 is slidably installed with a lifting sliding block 26, the lifting sliding block 26 is fixedly installed with a connecting pipe 27, the lifting sliding block 26 is fixedly installed with an L-shaped frame plate 28, the L-shaped frame plate 28 is fixedly installed with a mounting frame plate 29, the mounting frame plate 29 is internally provided with a limiting arc groove 30, the limiting arc groove 30 is slidably installed with a limiting arc block 43, the limiting arc block 43 is fixedly installed with a circular plate 31, the outer side of the circular plate 31 is fixedly installed with an auxiliary tooth block 32, the circular plate 31 is fixedly installed with an L-shaped connecting pipe 33, one end of the L-shaped connecting pipe 33 is fixedly communicated with a second hose 34, the inner side of the V-shaped frame plate 24 is fixedly installed with a U-shaped tooth plate 35, the inner side of the U-shaped tooth plate 35 is provided with a first tooth block 36 and a second tooth block 37 arranged in cross, the upper end surface of the driving gear 10 is fixedly installed with a lifting lead screw 38, the lifting lead screw 38 is movably installed with a lifting screw block 39, the lifting screw block 39 is fixedly installed with a connecting frame rod 40, the side end surface of the bracket plate 2 is fixedly installed with a stable plate 41, the shunt pipe 22 is fixedly installed on the V-shaped frame plate 24, one end of the first hose 23 away from the shunt pipe 22 is fixedly communicated on the connecting pipe 27, one end of the second hose 34 away from the L-shaped connecting pipe 33 is fixedly communicated on the connecting pipe 27, the auxiliary tooth block 32 is engaged with the first tooth block 36 and the second tooth block 37 in sequence, the exhaust nozzle 42 is fixedly communicated on the L-shaped connecting pipe 33, one end of the connecting frame rod 40 away from the lifting screw block 39 is slidably installed with the lifting sliding block 26, wherein the functions of the first hose 23 and the second hose 34 are utilized to ensure that the exhaust nozzle 42 will not affect the normal conveying of hot air flow when being in the lifting and swinging state.

[0021] When the 3D printed part needs to be heat treated, the hot air generated by the start of the heat fan 21 is transported through the first hose 23 on the shunt pipe 22 into the connecting pipe 27, and then transported through the second hose 34 on the connecting pipe 27 into the L-shaped pipe 33. The hot air in the L-shaped pipe 33 is blown onto the 3D printed part through the exhaust nozzle 42. At the same time, the rotation of the driving gear 10 drives the lifting lead screw 38 to rotate. The lifting block 39 on the lifting lead screw 38 is limited to slide in the lifting sliding groove 25 through the cooperation of the connecting frame rod 40 and the V-shaped frame plate 24, so that the exhaust nozzle 42 on the U-shaped tooth plate 35 adjusts the position up and down, ensuring that the gas discharged by the exhaust nozzle 42 better contacts the 3D printed part, effectively improving the effect of the heat pretreatment of the 3D printed part. When the U-shaped tooth plate 35 reciprocatingly rises and falls with the lifting block 26, the circular plate 31 in the mounting frame plate 29 swings back and forth through the cooperation of the auxiliary tooth block 32, the first tooth block 36 and the second tooth block 37, and the sliding of the limiting arc block 43 in the limiting arc groove 30, so that the circular plate 31 swings back and forth to drive the exhaust nozzle 42 on the L-shaped pipe 33 to swing back and forth, improving the uniform contact of the hot air flow with the 3D printed part.

[0022] Working principle: in use, the 3D printed parts to be heat treated are placed on the placement platform 7, at the same time the main bevel gear 18 on the drive rod 17 is driven to rotate by the second motor 16, the adjustment lead screw 19 is driven to rotate by the cooperation of the main bevel gear 18 and the auxiliary bevel gear 20, the height of the placement platform 7 is adjusted by the cooperation of the adjustment lead screw 19 and the adjustment column 14, and the cooperation of the lifting column 12 and the lifting rod 13, the driving gear 10 is driven to rotate by the first motor 9, the driving gear 10 drives the driven gear 11 to rotate through the chain on the driving gear 10, the placement platform 7 is driven to rotate through the adjustment column 14 on the driven gear 11, when the 3D printed parts need to be heat treated, the hot air flow generated by the starting of the hot fan 21 is transported into the connecting pipe 27 through the first hose 23 on the shunt pipe 22, and then transported into the L-shaped pipe 33 through the second hose 34 on the connecting pipe 27, the hot air flow in the L-shaped pipe 33 blows to the 3D printed parts through the exhaust nozzle 42, at the same time the lifting lead screw 38 is driven to rotate by the rotation of the driving gear 10, the lifting block 39 on the lifting lead screw 38 is limited to slide in the lifting sliding groove 25 through the cooperation of the connecting frame rod 40 and the V-shaped frame plate 24, so that the exhaust nozzle 42 on the U-shaped tooth plate 35 is adjusted in the up-down position, ensuring that the gas discharged by the exhaust nozzle 42 better contacts the 3D printed parts, when the U-shaped tooth plate 35 reciprocatingly rises and falls with the lifting block 26, the circular plate 31 in the mounting frame plate 29 is in a state of forward and backward swinging through the cooperation of the auxiliary tooth block 32, the first tooth block 36 and the second tooth block 37, and the sliding of the limiting arc block 43 in the limiting arc groove 30, the circular plate 31 is used to drive the exhaust nozzle 42 on the L-shaped pipe 33 to swing forward and backward, which improves the uniform contact of the hot air flow with the 3D printed parts, after the preheating treatment of the 3D printed parts is completed, the heat treatment device 3 is moved to the specified position by the mechanical arm 1, the 3D printed parts are heat treated by the mechanical arm 1, and the heat treatment effect of the 3D printed parts is effectively improved through the cooperation of the rotatable placement platform 7 and the heat treatment device 3 on the mechanical arm 1.

[0023] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0024] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and changes can be made by those skilled in the art without departing from the spirit and principles of the present application.

Claims

1. A molding equipment for complex structure gradient parts based on 3D printing, comprising a robotic arm (1) and a support plate (2), characterized in that: A heat processor (3) is fixedly installed at the tail end of the robotic arm (1). A U-shaped frame plate (4) is fixedly installed on the upper surface of the support plate (2). An installation ring (5) is fixedly installed on the upper surface of the U-shaped frame plate (4). A U-shaped fixed plate (6) is fixedly installed on the installation ring (5). A drive assembly is provided on the U-shaped frame plate (4) and the U-shaped fixed plate (6). A placement platform (7) is provided on the drive assembly. The support plate (2) is provided with a pretreatment component, and the pretreatment component is provided with an exhaust nozzle (42).

2. The molding equipment for complex structure gradient parts based on 3D printing according to claim 1, characterized in that: The drive assembly includes a mounting plate (8) fixedly mounted on a U-shaped frame plate (4), a first motor (9) fixedly mounted on the mounting plate (8), a drive gear (10) fixedly mounted on the output end of the first motor (9), a driven gear (11) rotatably mounted on the outer side of the mounting ring (5), a lifting column (12) fixedly mounted on the driven gear (11), a lifting rod (13) slidably mounted inside the lifting column (12), an adjusting column (14) slidably mounted on the U-shaped fixed plate (6), and a threaded hole (15) opened at the bottom end of the adjusting column (14).

3. The molding equipment for complex structure gradient parts based on 3D printing according to claim 2, characterized in that: A second motor (16) is fixedly installed on the front surface of the U-shaped frame plate (4). A drive rod (17) is fixedly installed at the output end of the second motor (16). A main bevel gear (18) is fixedly installed on the drive rod (17). An adjusting screw (19) is rotatably installed on the U-shaped frame plate (4). A secondary bevel gear (20) is fixedly installed at the bottom end of the adjusting screw (19).

4. The molding equipment for complex structure gradient parts based on 3D printing according to claim 3, characterized in that: The driving gear (10) and driven gear (11) are on the same horizontal plane. The driving gear (10) and driven gear (11) are driven by a chain. The bottom end of the adjusting screw (19) extends into the interior of the U-shaped frame plate (4). The main bevel gear (18) meshes with the secondary bevel gear (20). The top end of the adjusting screw (19) extends into the interior of the threaded hole (15) and is threaded into the threaded hole (15).

5. The molding equipment for complex structure gradient parts based on 3D printing according to claim 3, characterized in that: The pretreatment component includes a hot air fan (21) fixedly mounted on a support plate (2). The output end of the hot air fan (21) is fixedly connected to a split pipe (22). The end of the split pipe (22) away from the hot air fan (21) is fixedly connected to a first flexible hose (23). A V-shaped frame plate (24) is fixedly mounted on the outer side of the support plate (2). A lifting groove (25) is provided on the V-shaped frame plate (24). A lifting slider (26) is slidably mounted inside the lifting groove (25). A connecting pipe (27) is fixedly mounted on the lifting slider (26).

6. The molding equipment for complex structure gradient parts based on 3D printing according to claim 5, characterized in that: An L-shaped frame plate (28) is fixedly installed on the lifting slider (26), and an installation frame plate (29) is fixedly installed on the L-shaped frame plate (28). A limiting arc groove (30) is opened inside the installation frame plate (29), and a limiting arc block (43) is slidably installed inside the limiting arc groove (30). A circular plate (31) is fixedly installed on the limiting arc block (43), and an auxiliary tooth block (32) is fixedly installed on the outer side of the circular plate (31). An L-shaped connecting pipe (33) is fixedly installed on the circular plate (31), and one end of the L-shaped connecting pipe (33) is fixedly connected to a second flexible hose (34).

7. The molding equipment for complex structure gradient parts based on 3D printing according to claim 6, characterized in that: A U-shaped toothed plate (35) is fixedly installed on the inner side of the V-shaped frame plate (24). The inner side of the U-shaped toothed plate (35) is provided with a first tooth block (36) and a second tooth block (37) arranged in a cross pattern. A lifting screw (38) is fixedly installed on the upper end face of the drive gear (10). A lifting screw block (39) is movably installed on the lifting screw block (38). A connecting rod (40) is fixedly installed on the lifting screw block (39). A stabilizing plate (41) is fixedly installed on the side end face of the support plate (2).

8. The molding equipment for complex structure gradient parts based on 3D printing according to claim 7, characterized in that: The diversion pipe (22) is fixedly installed on the V-shaped frame plate (24). The end of the first hose (23) away from the diversion pipe (22) is fixedly connected to the connecting pipe (27). The end of the second hose (34) away from the L-shaped connector (33) is fixedly connected to the connecting pipe (27). The auxiliary tooth block (32) meshes with the first tooth block (36) and the second tooth block (37) in sequence. The exhaust nozzle (42) is fixedly connected to the L-shaped connector (33). The end of the connecting frame rod (40) away from the lifting screw block (39) is slidably installed with the lifting slider (26).

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