High-pressure cleaning machine with novel spray gun structure

Abstract

The invention discloses a high-pressure cleaning machine with a novel spray gun structure. The high-pressure cleaning machine is composed of a cart, a booster pump and a spray gun body. The spray gun body comprises a spray gun shell, a trigger and a gun valve body, and the trigger is rotationally installed on the gun valve body and can control opening and closing of the gun valve body. The spray gun body is further provided with a nozzle, a negative pressure pipe and other components. The negative pressure pipe is communicated with the gun valve body and the nozzle, a negative pressure area is formed in the pipe, and an air valve and a liquid extractor are installed on an upper installation opening and a lower installation opening respectively. The liquid extractor is composed of a fixing pipe and a liquid extracting hose, a one-way valve is arranged in the fixing pipe, and the kettle body and the liquid extracting hose are detachably connected to the bottom end of the fixing pipe. The one-way valve is composed of a second spring, a semi-spherical valve element and the like, and an inserting rod can be inserted into a first annular groove of a valve element movable rod. When the inserting rod is inserted into the first ring groove, the one-way valve is closed, and water flow is directly sprayed out in a clear water form; the driving rod is operated to move the inserting rod out of the first annular groove, the negative pressure area drives the valve element to move through negative pressure, the one-way valve is opened, cleaning liquid in the kettle is extracted to be mixed with water to be sprayed out, and convenient switching of cleaning liquid spraying and clean water spraying is achieved.

Description

Technical Field

[0001] The present invention relates to the field of cleaning machines, in particular to a high-pressure cleaning machine with a novel spray gun structure. Background Art

[0002] High-pressure cleaners with a novel spray gun structure use a high-pressure plunger pump powered by a power unit to generate high-pressure water to wash surfaces. They remove dirt and flush it away, effectively cleaning surfaces. Compared to traditional manual cleaning methods, high-pressure cleaners with a novel spray gun structure reduce water consumption, save significant time, and deliver superior cleaning results.

[0003] Before cleaning, it's usually necessary to evenly spray cleaning fluid onto the surface. This typically involves removing the original adjustable nozzle from the spray gun and then installing a foam pot assembly on the front of the high-pressure washer's spray gun, which features a new spray gun structure. This allows the high-pressure water flow to mix with the concentrate and spray out the cleaning fluid. However, each time you switch between cleaning fluid and water, you need to remove and install the foam pot assembly and the adjustable nozzle, which is inconvenient. Summary of the Invention

[0004] In order to facilitate the switching between the spraying of foam liquid and clean water in the spray gun of a high-pressure cleaning machine with a new spray gun structure, the present application provides a high-pressure cleaning machine with a new spray gun structure.

[0005] The present application provides a high-pressure cleaning machine with a novel spray gun structure adopts the following technical solutions: A high-pressure cleaning machine with a novel spray gun structure comprises a cart, a booster pump and a spray gun body, wherein the booster pump is fixedly arranged on the cart, and the inlet of the booster pump is connected to a water source through a water pipe; The spray gun body includes a spray gun housing, a trigger, and a gun valve body. The spray gun housing is formed with a handle portion. The inlet of the gun valve body is connected to the outlet of the booster pump through a water pipe. The gun valve body is provided with a valve ball, a valve stem for driving the valve ball to move, and a first spring for driving the valve ball to return to its original position. The top end of the trigger is rotatably provided on the gun valve body. The trigger moves within the handle portion and is used to drive the valve stem. The spray gun body also includes a nozzle, a negative pressure pipe, an air valve, a liquid lifter, a kettle body, an insertion rod and a driving rod. The inlet and outlet of the negative pressure pipe are respectively connected to the outlet of the gun valve body and the nozzle. A negative pressure area is formed in the negative pressure pipe. The negative pressure pipe is provided with an upper mounting port and a lower mounting port connected to the negative pressure area. The air valve is provided on the upper mounting port. The liquid lifter includes a fixed pipe and a liquid lifting hose. The fixed pipe is provided on the lower mounting port. A one-way valve is provided in the fixed pipe. The kettle body and the liquid lifting hose are both detachable at the bottom end of the fixed pipe. The liquid lifting hose extends into the kettle body. The one-way valve includes a second spring and a semi-spherical valve core, the fixed tube has a first step surface that cooperates with the valve core, the two ends of the second spring respectively abut the end wall of the lower mounting port and the valve core, driving the valve core to press against the first step surface, the valve core is provided with a movable rod, and the movable rod is coaxially provided with a first annular groove, the plug rod slides on the fixed tube along the movable valve core perpendicular to the valve core, the driving rod slides on the handle part of the spray gun housing in an inclined direction, and the end of the plug rod away from the fixed rod is slidably connected to the top end of the driving rod in the inclined direction; when the plug rod is inserted into the first annular groove, the valve core always presses against the first step surface.

[0006] By adopting the above technical solution, when using a high-pressure cleaner with a new spray gun structure to spray clean water, the rod is inserted into the first annular groove, the valve core is always pressed against the first step surface, and the one-way valve in the liquid lifter is closed. At this time, water flows directly from the booster pump through the gun valve body and the negative pressure pipe to the nozzle and is sprayed out in the form of clean water. When it is necessary to spray cleaning liquid, the rod is moved out of the first annular groove by operating the driving rod. The valve core overcomes the elastic force of the second spring under the negative pressure of the negative pressure zone and moves, the one-way valve opens, and the negative pressure zone in the negative pressure pipe draws concentrated cleaning liquid from the pot body through the liquid lifter. After mixing with the water, the cleaning liquid is sprayed out from the nozzle, realizing convenient switching between cleaning liquid and clean water spraying, without the need to disassemble and install the foam pot assembly and nozzle, thereby improving the convenience and efficiency of use.

[0007] Preferably, the movable rod is located below the valve core, and the movable rod is slidably connected in the fixed tube along the axial direction of the fixed tube. The movable rod is provided with a plurality of liquid inlet channels in sequence along the circumferential direction. The liquid inlet channels are opened along the length direction of the movable rod and pass through the movable rod, and the first annular groove is connected to the plurality of liquid inlet channels.

[0008] By adopting the above technical solution, the moving direction of the movable rod is limited without affecting the concentrated cleaning liquid entering the negative pressure pipe, so that the insertion rod can be better aligned with the first annular groove and the movement of the valve core can be better restricted.

[0009] Preferably, it also includes a toggle block, a locking piece and an elastic reset piece, the elastic reset piece is used to drive the driving rod to move upward so that the insertion rod is inserted into the first annular groove; the driving rod is located on the side of the trigger close to the nozzle, and the trigger is provided with a through groove, the bottom end of the toggle block is rotatably connected in the through groove, and the locking piece is used to lock the position of the toggle block when the toggle block is rotated back into the through groove, the top of the toggle block is hook-shaped, and a hook block that cooperates with the top of the toggle block is provided on the outer wall of the side of the driving rod facing the trigger, when the toggle block is rotated to hook the hook block, the trigger is away from the valve stem, and when the toggle block hooks the hook block and the trigger is in a pressed state, the insertion rod moves out of the first annular groove.

[0010] By adopting the above technical solution, when the toggle block rotates back into the through groove, the locking member locks the toggle block. At this time, no external force acts on the drive rod, the plunger enters the first annular groove, the one-way valve closes, and the spray gun sprays clean water. When the toggle block rotates to hook the hook block, pressing the trigger drives the drive rod downward, causing the plunger to move out of the first annular groove, opening the one-way valve, and spraying the cleaning fluid from the spray gun. This structure makes operation simpler and more intuitive. The linkage design between the trigger and the toggle block achieves reliable control of spray mode switching. The toggle block hooking the hook block is located in a conspicuous position that the operator can see every time they operate, making it easier for the operator to judge the spray status of the spray gun at that time.

[0011] Preferably, the locking member includes a first magnet and a second magnet that are attracted to each other, the first magnet is embedded in the toggle block, and the second magnet is embedded in the trigger. When the toggle block rotates into the through slot, the first magnet attracts the second magnet.

[0012] By adopting the above technical solution, when the toggle block rotates into the through slot, the first magnet and the second magnet attract each other, so that the toggle block can be stably fixed in the through slot.

[0013] Preferably, a first sliding groove is provided on the handle portion, the driving rod slides in the first sliding groove, the elastic return member includes a third spring, the third spring is arranged in the first sliding groove, and the two ends of the third spring respectively abut against the bottom end of the driving rod and the end wall of the bottom end of the first sliding groove.

[0014] By adopting this technical solution, the third spring acts as an elastic reset element, driving the drive rod upward when no external force is applied to the drive rod, allowing the insertion rod to automatically insert into the first annular groove. This automatic reset design simplifies the operation process. When switching from cleaning liquid spray mode to fresh water spray mode, no additional complex operation is required. Simply turn the toggle block back to the through slot, and the third spring will quickly restore the original fresh water spray state, improving operational convenience and work efficiency.

[0015] Preferably, a limiting groove is provided in the spray gun housing, and the limiting groove is located on the side of the trigger top away from the valve stem. A fourth spring is provided in the limiting groove, and the two ends of the fourth spring respectively abut the bottom wall of the limiting groove and the trigger top, for driving the trigger to abut the valve stem.

[0016] By adopting the above technical solution, the fourth spring can always provide a force for the trigger to abut against the valve stem. This force is much smaller than the elastic force of the first spring and is only used to prevent the trigger from shaking randomly.

[0017] Preferably, the handle portion is provided with a rotation limiting groove matching the top of the toggle block on the inner wall of the trigger away from the nozzle. When the toggle block rotates to the top and enters the rotation limiting groove, the trigger cannot be pressed.

[0018] By adopting the above technical solution, when the toggle block rotates to the top and enters the rotation limit groove, under the action of the fourth spring, the toggle block will abut against the rotation limit groove, and a gap will be left between the trigger and the valve stem, which limits the further rotation of the toggle block and also makes the trigger unable to be pressed, preventing children or people who do not know how to use the high-pressure cleaner with the new spray gun structure from accidentally touching the trigger and causing injury.

[0019] Preferably, it also includes a foaming component, the foaming component includes a foaming core, a first rack, a second rack and a gear, the negative pressure tube has a second step surface between the negative pressure area and the nozzle, a second slide groove is opened through the negative pressure tube, the second step surface is located on the side of the second slide groove away from the negative pressure area, the top end of the first rack is fixed on the foaming core, the first rack and the foaming core slide in the second slide groove, the second rack is fixed on the insertion rod, the second rack is slidably connected to the spray gun housing along the sliding direction of the insertion rod, the gear is rotatably connected to the spray gun housing, and the first rack and the second rack are respectively meshed with the gear; When the insertion rod is inserted into the first annular groove, the bottom end of the first rack abuts against the spray gun housing, and the foaming core is completely located in the second slide groove; when the toggle block hooks the hook block and the trigger is in a pressed state, the foaming core moves into the negative pressure tube and abuts against the inner wall of the negative pressure tube and the second step surface.

[0020] By adopting the above technical solution, when the rod is inserted into the first annular groove to spray clean water, the foaming core is completely located in the second chute, without affecting the normal flow of water. At the same time, the pressure of the water flow on the foaming core drives the bottom end of the first rack to abut against the spray gun housing, thereby further stabilizing the rotation of the gear with the help of the force of the water pressure, thereby stabilizing the position of the rod and keeping the one-way valve in a closed state. When it is necessary to spray cleaning liquid, that is, when the rod is removed from the first annular groove, the rod drives the second rack to move, and then the first rack drives the foaming core to move into the negative pressure tube through the gear transmission. The foaming core can foam the cleaning liquid, making the foam richer and more delicate, enhancing the adsorption and cleaning ability of dirt, and further improving the cleaning effect.

[0021] Preferably, a notch groove is provided on the side surface of the foam core facing the negative pressure zone, and the notch groove has an inclined surface slanting downward toward the side of the kettle body.

[0022] By adopting the above technical solution, the inclined surface design of the notch groove can guide the mixed liquid to flow into the foaming core more smoothly, thereby increasing the contact area with the foaming core. At the same time, the inclined surface setting of the notch groove can enable the water pressure to have an oblique upward pushing force on the foaming core. This part of the pushing force enables the foaming core to press tightly against the second step surface and the top wall inside the negative pressure tube, thereby reducing the pushing force on the first rack and making it easier to pull the trigger.

[0023] The technical effects of the present invention are mainly reflected in the following aspects: 1. When the high-pressure cleaner with a novel spray gun structure is used to spray clean water, the present invention inserts the rod into the first annular groove, the valve core always presses against the first step surface, and the one-way valve in the liquid lifter is closed. At this time, water flows directly from the booster pump through the gun valve body and the negative pressure pipe to the nozzle and is sprayed out in the form of clean water. When it is necessary to spray cleaning liquid, the rod is moved out of the first annular groove by operating the driving rod. The valve core overcomes the elastic force of the second spring under the negative pressure of the negative pressure zone and moves, the one-way valve opens, and the negative pressure zone in the negative pressure pipe draws the concentrated cleaning liquid in the pot body through the liquid lifter. After mixing with the water flow, the cleaning liquid is sprayed out from the nozzle, realizing the convenient switching between cleaning liquid and clean water spraying, without the need to disassemble and install the foam pot assembly and the nozzle, thereby improving the convenience and efficiency of use. 2. In the present invention, when the toggle block rotates back into the through groove, the locking member locks the toggle block. At this point, no external force acts on the drive rod, the insertion rod inserts into the first annular groove, the one-way valve closes, and the spray gun sprays clean water. When the toggle block rotates to hook the hook block, pressing the trigger drives the drive rod downward, causing the insertion rod to move out of the first annular groove, opening the one-way valve, and spraying the cleaning fluid from the spray gun. This structure makes operation simpler and more intuitive. The linkage between the trigger and the toggle block enables reliable control of spray mode switching. Furthermore, the toggle block hooking the hook block is located in a prominent position visible to the operator during each operation, making it easier for the operator to determine the spray status of the spray gun at that time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0025] Figure 2 This is a schematic diagram of the internal structure of the spray gun body when the trigger cannot be pressed according to the embodiment of the present application.

[0026] Figure 3 It is a cross-sectional view of the spray gun body of the embodiment of the present application when the toggle block is rotated to hook the hook block.

[0027] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0028] Figure 5 It is a cross-sectional view of the embodiment of the present application when the toggle block of the spray gun body is hooked on the hook block and the trigger is in a pressed state.

[0029] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0030] Figure 7 It is a schematic diagram of the connection between the second rack and the insertion rod in an embodiment of the present application.

[0031] Figure 8 It is a schematic diagram of the mounting structure of the gear and the sliding structure of the second rack in an embodiment of the present application.

[0032] Figure 9 It is a structural diagram of the foam core.

[0033] Explanation of reference numerals: 1. cart; 11. booster pump; 12. water pipe; 2. spray gun body; 21. spray gun housing; 211. handle; 212. first slide groove; 213. third spring; 214. limit groove; 215. fourth spring; 216. rotation limit groove; 22. trigger; 221. through groove; 23. gun valve body; 231. valve ball; 232. valve stem; 233. first spring; 24. nozzle; 25. negative pressure pipe; 251. upper mounting port; 252. lower mounting port; 253. second slide groove; 26. air valve; 27. kettle body; 28. Insert rod; 29, drive rod; 291, hook block; 3, liquid lifter; 31, fixed tube; 311, first step surface; 312, convex ring; 32, liquid lift hose; 33, one-way valve; 331, second spring; 332, valve core; 34, movable rod; 341, first ring groove; 342, liquid guide channel; 4, toggle block; 41, first magnet; 42, second magnet; 5, foaming component; 51, foaming core; 52, first rack; 53, second rack; 54, gear; 55, second step surface; 56, sealing ring; 57, notch groove; 571, inclined surface. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1-9 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0035] The embodiment of the present application discloses a high-pressure cleaning machine with a novel spray gun structure.

[0036] Reference Figure 1-Figure 2 A high-pressure cleaning machine with a new spray gun structure in this embodiment includes a cart 1, a booster pump 11 and a spray gun body 2. The booster pump 11 is fixedly arranged on the cart 1, and the inlet of the booster pump 11 is connected to the water source through a water pipe 12.

[0037] Reference Figure 2-Figure 6 The spray gun body 2 includes a spray gun housing 21, a trigger 22 and a gun valve body 23. The spray gun housing 21 is formed with a handle portion 211. The inlet of the gun valve body 23 is connected to the outlet of the booster pump 11 through the water pipe 12. A valve ball 231 and a valve stem 232 for driving the valve ball 231 to move and a first spring 233 for driving the valve ball 231 to return are provided in the gun valve body 23. The top end of the trigger 22 is rotatably provided on the gun valve body 23, and the trigger 22 moves in the handle portion 211 to drive the valve stem 232.

[0038] Reference Figure 2-Figure 6 The spray gun body 2 also includes a nozzle 24, a negative pressure tube 25, an air valve 26, a liquid lifter 3, a kettle body 27, an insertion rod 28 and a driving rod 29. The inlet and outlet of the negative pressure tube 25 are respectively connected to the outlet of the gun valve body 23 and the nozzle 24. A negative pressure area is formed in the negative pressure tube 25. The negative pressure tube 25 is provided with an upper mounting port 251 and a lower mounting port 252 which are connected to the negative pressure area. The air valve 26 is arranged on the upper mounting port 251. The liquid lifter 3 includes a fixed tube 31 and a liquid lifting hose 32. The fixed tube 31 is arranged on the lower mounting port 252. A one-way valve 33 is provided in the fixed tube 31. The kettle body 27 and the liquid lifting hose 32 are both detachable at the bottom end of the fixed tube 31, and the liquid lifting hose 32 extends into the kettle body 27.

[0039] Reference Figure 2-Figure 6 The spray gun housing 21 is composed of two symmetrical plastic shells, connected by screws. The negative pressure tube 25 is composed of a Venturi tube and multiple pipe fittings, primarily utilizing the Bernoulli principle. This is a common accessory and represents established technology, so I won't elaborate on it here. The nozzle 24 extends beyond the spray gun housing 21, making it easy for the operator to use the adjustable nozzle 24.

[0040] Reference Figure 2-Figure 6 The one-way valve 33 includes a second spring 331 and a semi-spherical valve core 332. The fixed tube 31 includes a first stepped surface 311 that mates with the valve core 332. The two ends of the second spring 331 respectively abut the end wall of the lower mounting opening 252 and the valve core 332, driving the valve core 332 against the first stepped surface 311. A movable rod 34 is provided on the valve core 332, which is coaxially defined with a first annular groove 341. The plunger 28 slides along the fixed tube 31 perpendicular to the valve core 332, while the drive rod 29 slides along an inclined direction on the handle 211 of the spray gun housing 21. The end of the plunger 28, away from the fixed rod, is slidably connected to the top end of the drive rod 29 along an inclined direction. This slidable connection can be achieved through the mating of a wedge block and a wedge groove, or an I-shaped block and an I-shaped groove. When the plunger 28 is inserted into the first annular groove 341, the valve core 332 always abuts against the first stepped surface 311.

[0041] Reference Figure 2-Figure 6 The air valve 26 is completely located within the spray gun housing 21. The bottom end of the fixed tube 31 extends outward from the spray gun housing 21 and is coaxially protruded outward to form a raised ring 312 for mounting the liquid lifting hose 32. The top end of the liquid lifting hose 32 is sleeved onto the raised ring 312 at the bottom end of the fixed tube 31. The kettle body 27 is threadedly connected to the outer wall of the bottom end of the fixed tube 31. The two ends of the insertion rod 28 are located on the inner and outer sides of the fixed tube 31, respectively. The top end of the drive rod 29 extends into the spray gun housing 21 to cooperate with the insertion rod 28. The bottom end of the drive rod 29 is located on the handle portion 211, and the operator can actively move the drive rod 29 from the outside. The end of the insertion rod 28 facing the first annular groove 341 is tapered to better align with and enter the first annular groove 341.

[0042] Reference Figure 2-Figure 6 When using a high-pressure cleaner with a novel spray gun structure to spray clean water, the rod 28 is inserted into the first annular groove 341, the valve core 332 is always pressed against the first step surface 311, and the one-way valve 33 in the liquid extractor 3 is closed. At this time, water flows from the booster pump 11 through the gun valve body 23 and the negative pressure pipe 25 directly to the nozzle 24, and is sprayed out in the form of clean water. When it is necessary to spray cleaning liquid, the driving rod 29 is operated to move the rod 28 out of the first annular groove 341. The valve core 332 moves under the negative pressure of the negative pressure zone, overcoming the elastic force of the second spring 331, and the one-way valve 33 opens. The negative pressure zone in the negative pressure pipe 25 draws concentrated cleaning liquid from the pot body 27 through the liquid extractor 3, and after mixing with the water, the cleaning liquid is sprayed out from the nozzle 24. This realizes the convenient switching between cleaning liquid and clean water spraying, and does not require the disassembly and installation of the foam pot assembly and the nozzle 24, thereby improving the convenience and efficiency of use.

[0043] Reference Figure 2-Figure 6 The movable rod 34 is located below the valve core 332. The movable rod 34 is slidably connected to the fixed tube 31 along the axial direction of the fixed tube 31. The movable rod 34 is provided with a plurality of liquid inlet channels 342 in sequence along the circumferential direction. The liquid inlet channels 342 are opened along the length direction of the movable rod 34 and pass through the movable rod 34. The first annular groove 341 is connected to the plurality of liquid inlet channels 342.

[0044] Reference Figure 2-Figure 6 Without affecting the concentrated cleaning liquid entering the negative pressure pipe 25, the moving direction of the movable rod 34 is limited, so that the insertion rod 28 can be better aligned with the first annular groove 341 and the movement of the valve core 332 can be better restricted.

[0045] Reference Figure 2-Figure 6 , also includes a toggle block 4, a locking piece and an elastic return piece, the elastic return piece is used to drive the driving rod 29 to move upward so that the insertion rod 28 is inserted into the first annular groove 341; the driving rod 29 is located on the side of the trigger 22 close to the nozzle 24, and the trigger 22 is provided with a through groove 221. The bottom end of the toggle block 4 is rotatably connected to the through groove 221, and the locking piece is used to lock the position of the toggle block 4 when the toggle block 4 is rotated back into the through groove 221. The top of the toggle block 4 is hook-shaped, and a hook block 291 is provided on the outer wall of the side of the driving rod 29 facing the trigger 22, which cooperates with the top of the toggle block 4. When the toggle block 4 is rotated to hook the hook block 291, the trigger 22 is away from the valve stem 232. When the toggle block 4 hooks the hook block 291 and the trigger 22 is in a pressed state, the insertion rod 28 moves out of the first annular groove 341.

[0046] Reference Figure 2-Figure 6When the toggle block 4 rotates back into the through groove 221, the locking member locks the toggle block 4. At this point, no external force acts on the drive rod 29, the insertion rod 28 inserts into the first annular groove 341, the one-way valve 33 closes, and the spray gun sprays clean water. When the toggle block 4 rotates to hook the hook block 291, pressing the trigger 22 drives the drive rod 29 downward, causing the insertion rod 28 to move out of the first annular groove 341, opening the one-way valve 33, and spraying the cleaning fluid. This structure makes operation simpler and more intuitive. The linkage between the trigger 22 and the toggle block 4 enables reliable control of the spray mode switch. Furthermore, the toggle block 4 hooking the hook block 291 is located in a conspicuous position that the operator can see every time they operate, making it easier for the operator to determine the spray status of the spray gun at that time.

[0047] Reference Figure 2-Figure 6 The locking member includes a first magnet 41 and a second magnet 42 that are attracted to each other. The first magnet 41 is embedded in the toggle block 4, and the second magnet 42 is embedded in the trigger 22. When the toggle block 4 rotates into the through slot 221, the first magnet 41 attracts the second magnet 42.

[0048] Reference Figure 2-Figure 6 When the toggle block 4 rotates into the through slot 221 , the first magnet 41 and the second magnet 42 attract each other, thereby stably fixing the toggle block 4 in the through slot 221 .

[0049] Reference Figure 2-Figure 6 A first sliding groove 212 is provided on the handle portion 211, and the driving rod 29 slides in the first sliding groove 212. The elastic return member includes a third spring 213, and the third spring 213 is arranged in the first sliding groove 212. The two ends of the third spring 213 respectively abut against the bottom end of the driving rod 29 and the end wall of the bottom end of the first sliding groove 212.

[0050] Reference Figure 2-Figure 6 The third spring 213 acts as an elastic reset element. When the drive rod 29 is not subjected to external force, it can drive the drive rod 29 upward, causing the drive rod 29 to abut against the outer wall of the negative pressure tube 25, and at the same time automatically inserting the insertion rod 28 into the first annular groove 341. This automatic reset design simplifies the operation process. When switching from the cleaning liquid spray mode to the clean water spray mode, no additional complicated operations are required. Simply rotate the toggle block 4 back to the through groove 221, and the action of the third spring 213 will quickly restore it to the initial clean water spray state, improving operational convenience and work efficiency.

[0051] Reference Figure 2-Figure 6 A limiting groove 214 is provided in the spray gun housing 21. The limiting groove 214 is located on the side of the top of the trigger 22 away from the valve stem 232. A fourth spring 215 is provided in the limiting groove 214. The two ends of the fourth spring 215 respectively abut the bottom wall of the limiting groove 214 and the top of the trigger 22, so as to drive the trigger 22 to abut the valve stem 232.

[0052] Reference Figure 2-Figure 6 The fourth spring 215 can always provide a force for the trigger 22 to abut against the valve stem 232. This force is much smaller than the elastic force of the first spring 233 and is only used to prevent the trigger 22 from shaking at will.

[0053] Reference Figure 2-Figure 6 The handle portion 211 is located on the inner wall of the trigger 22 away from the nozzle 24 and is provided with a rotation limiting groove 216 that matches the top of the toggle block 4. When the toggle block 4 rotates to the top and enters the rotation limiting groove 216, the trigger 22 cannot be pressed.

[0054] Reference Figure 2-Figure 6 When the toggle block 4 rotates to the top and enters the rotation limiting groove 216, under the action of the fourth spring 215, the toggle block 4 will abut against the rotation limiting groove 216, and a gap will be left between the trigger 22 and the valve stem 232, which limits the further rotation of the toggle block 4 and also makes the trigger 22 unable to be pressed, preventing children or people who do not know how to use the high-pressure cleaner with a new spray gun structure from accidentally touching the trigger 22 and causing injury.

[0055] Reference Figure 2-Figure 6 , also includes a foaming assembly 5, which includes a foaming core 51, a first rack 52, a second rack 53, and a gear 54. The negative pressure tube 25 has a second step surface 55 located between the negative pressure area and the nozzle 24. A second chute 253 is provided through the negative pressure tube 25. The second step surface 55 is located on the side of the second chute 253 away from the negative pressure area. The top of the first rack 52 is fixed to the foaming core 51. The first rack 52 and the foaming core 51 slide in the second chute 253. The second rack 53 is fixed to the insertion rod 28. A protrusion protrudes from the side wall of the insertion rod 28 and is connected to the second rack 53 by screws. The second rack 53 is slidably connected to the spray gun housing 21 along the sliding direction of the insertion rod 28. The gear 54 is rotatably connected to the spray gun housing 21. The first rack 52 and the second rack 53 are respectively meshed with the gear 54.

[0056] Reference Figure 2-Figure 6 The first rack 52 slides on one end of the second slide groove 253 without a tooth surface. At the same time, a second annular groove is provided on the first rack 52 and the insertion rod 28. A sealing ring 56 is installed in the second annular groove. When the first rack 52 and the insertion rod 28 slide, they can maintain the sealing of the negative pressure tube 25 and the fixed tube 31.

[0057] Reference Figure 2-Figure 6When the insertion rod 28 is inserted into the first annular groove 341, the bottom end of the first rack 52 abuts against the spray gun housing 21, and the foaming core 51 is completely located in the second slide groove 253; when the toggle block 4 hooks the hook block 291 and the trigger 22 is in a pressed state, the foaming core 51 moves into the negative pressure tube 25 and abuts against the inner wall of the negative pressure tube 25 and the second step surface 55.

[0058] Reference Figure 2-Figure 6 When the rod 28 is inserted into the first annular groove 341 to spray clean water, the foam core 51 is completely located in the second chute 253, which does not affect the normal flow of water. At the same time, the pressure of the water on the foam core 51 drives the bottom end of the first rack 52 to abut against the spray gun housing 21. The water pressure further stabilizes the rotation of the gear 54, thereby stabilizing the position of the rod 28 and keeping the one-way valve 33 in a closed state. When the cleaning liquid needs to be sprayed, that is, the rod 28 is removed from the first annular groove 341, the rod 28 drives the second rack 53 to move, and then the gear 54 drives the first rack 52 to move the foam core 51 into the negative pressure tube 25. The foam core 51 can foam the cleaning liquid, making the foam richer and more delicate, enhancing the adsorption and cleaning ability of dirt, and further improving the cleaning effect.

[0059] Reference Figure 2-Figure 6 A notch groove 57 is formed on the side of the foam core 51 facing the negative pressure area. The notch groove 57 has an inclined surface 571 that is inclined downward toward the side of the pot body 27 .

[0060] Reference Figure 2-Figure 6 The inclined surface 571 of the notch groove 57 is designed to guide the mixed liquid to flow into the foam core 51 more smoothly, thereby increasing the contact area with the foam core 51. At the same time, the inclined surface 571 of the notch groove 57 is set to enable the water pressure to have an oblique upward pushing force on the foam core 51. This part of the pushing force enables the foam core 51 to press tightly against the second step surface 55 and the top wall of the negative pressure tube 25, thereby reducing the pushing force on the first rack 52 and making it easier to pull the trigger 22.

[0061] Reference Figure 2-Figure 6 When the toggle rod hooks the hook block 291, there is a distance between the trigger 22 and the valve stem 232, the one-way valve 33 is unlocked first, and at the same time, part of the foaming core 51 also enters the negative pressure tube 25, and the gun valve body 23 is opened again, which can solve the problem that the trigger 22 needs to be pressed hard under the impact force of the water flow.

[0062] Reference Figure 7-Figure 9 , mainly showing the installation structure between some components inside the nozzle body.

[0063] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A high-pressure cleaning machine with a novel spray gun structure, characterized in that: The invention comprises a trolley (1), a booster pump (11) and a spray gun body (2), wherein the booster pump (11) is fixedly arranged on the trolley (1), and an inlet of the booster pump (11) is connected to a water source through a water pipe (12); The spray gun body (2) comprises a spray gun housing (21), a trigger (22) and a gun valve body (23); the spray gun housing (21) is formed with a handle portion (211); the inlet of the gun valve body (23) is communicated with the outlet of the booster pump (11) through a water pipe (12); a valve ball (231), a valve stem (232) for driving the valve ball (231) to move, and a first spring (233) for driving the valve ball (231) to return to its original position are provided in the gun valve body (23); the top end of the trigger (22) is rotatably provided on the gun valve body (23); the trigger (22) moves in the handle portion (211) and is used to drive the valve stem (232); The spray gun body (2) further comprises a nozzle (24), a negative pressure pipe (25), an air valve (26), a liquid extractor (3), a kettle body (27), an insert rod (28) and a drive rod (29), wherein the inlet and outlet of the negative pressure pipe (25) are respectively connected to the outlet of the gun valve body (23) and the nozzle (24), a negative pressure zone is formed in the negative pressure pipe (25), and an upper mounting port (251) and a lower mounting port (252) connected to the negative pressure zone are provided on the negative pressure pipe (25). The air valve (26) is arranged on the upper mounting port (251), the liquid extractor (3) comprises a fixed tube (31) and a liquid extracting hose (32), the fixed tube (31) is arranged on the lower mounting port (252), a one-way valve (33) is arranged in the fixed tube (31), the kettle body (27) and the liquid extracting hose (32) are both detachable at the bottom end of the fixed tube (31), and the liquid extracting hose (32) extends into the kettle body (27); The one-way valve (33) includes a second spring (331) and a semi-spherical valve core (332). The fixed tube (31) has a first step surface (311) that matches the valve core (332). The two ends of the second spring (331) respectively abut against the end wall of the lower installation port (252) and the valve core (332), driving the valve core (332) to press against the first step surface (311). The valve core (332) is provided with a movable rod (34), and the movable rod (34) is coaxially provided with a The first annular groove (341) is provided, and the insert rod (28) slides on the fixed tube (31) along the movable valve core (332) perpendicular to the valve core (332), and the driving rod (29) slides on the handle portion (211) of the spray gun housing (21) along an inclined direction, and the end of the insert rod (28) away from the fixed rod is connected to the top end of the driving rod (29) in a sliding manner along the inclined direction; when the insert rod (28) is inserted into the first annular groove (341), the valve core (332) always presses against the first step surface (311).

2. A high-pressure cleaning machine with a novel spray gun structure according to claim 1, characterized in that: The movable rod (34) is located below the valve core (332). The movable rod (34) is slidably connected to the fixed tube (31) along the axial direction of the fixed tube (31). The movable rod (34) is sequentially provided with a plurality of liquid inlet channels (342) along the circumferential direction. The liquid inlet channels (342) are opened along the length direction of the movable rod (34) and pass through the movable rod (34). The first annular groove (341) is connected to the plurality of liquid inlet channels (342).

3. The high-pressure cleaning machine with a novel spray gun structure according to claim 1, characterized in that: The invention also includes a toggle block (4), a locking member and an elastic reset member, wherein the elastic reset member is used to drive the driving rod (29) to move upward so that the insertion rod (28) is inserted into the first annular groove (341); the driving rod (29) is located on the side of the trigger (22) close to the nozzle (24); the trigger (22) is provided with a through groove (221); the bottom end of the toggle block (4) is rotatably connected to the through groove (221); the locking member is used to lock the toggle block (4) when the toggle block (4) is rotated back into the through groove (221). The position of the toggle block (4) is locked, the top of the toggle block (4) is hook-shaped, and a hook block (291) that cooperates with the top of the toggle block (4) is provided on the outer wall of the side of the driving rod (29) facing the trigger (22). When the toggle block (4) is rotated to hook the hook block (291), the trigger (22) is away from the valve stem (232). When the toggle block (4) hooks the hook block (291) and the trigger (22) is in a pressed state, the insertion rod (28) moves out of the first annular groove (341).

4. A high-pressure cleaning machine with a novel spray gun structure according to claim 3, characterized in that: The locking member comprises a first magnet (41) and a second magnet (42) that are attracted to each other, wherein the first magnet (41) is embedded in the toggle block (4), and the second magnet (42) is embedded in the trigger (22). When the toggle block (4) rotates into the through slot (221), the first magnet (41) attracts the second magnet (42).

5. The high-pressure cleaning machine with a novel spray gun structure according to claim 3, characterized in that: The handle portion (211) is provided with a first sliding groove (212), the driving rod (29) slides in the first sliding groove (212), and the elastic return member includes a third spring (213), the third spring (213) is arranged in the first sliding groove (212), and the two ends of the third spring (213) are respectively abutted against the bottom end of the driving rod (29) and the bottom end wall of the first sliding groove (212).

6. The high-pressure cleaning machine with a novel spray gun structure according to claim 3, characterized in that: The spray gun housing (21) has a limiting groove (214) therein, the limiting groove (214) being located on a side of the top end of the trigger (22) away from the valve stem (232), a fourth spring (215) being provided in the limiting groove (214), the two ends of the fourth spring (215) respectively abutting against the bottom wall of the limiting groove (214) and the top end of the trigger (22), for driving the trigger (22) to abut against the valve stem (232).

7. The high-pressure cleaning machine with a novel spray gun structure according to claim 6, characterized in that: The handle portion (211) is provided with a rotation-limiting groove (216) on the inner wall of the trigger (22) away from the nozzle (24) and matched with the top end of the toggle block (4). When the toggle block (4) rotates to the top end and enters the rotation-limiting groove (216), the trigger (22) cannot be pressed.

8. The high-pressure cleaning machine with a novel spray gun structure according to claim 3, characterized in that: The invention also includes a foaming component (5), wherein the foaming component (5) includes a foaming core (51), a first rack (52), a second rack (53) and a gear (54); a second step surface (55) is provided in the negative pressure tube (25) between the negative pressure zone and the nozzle (24); a second chute (253) is provided through the negative pressure tube (25); the second step surface (55) is located on the side of the second chute (253) away from the negative pressure zone; the top of the first rack (52) is provided with a second step surface (55); The first rack (52) and the foaming core (51) are fixed on the foaming core (51), and the first rack (52) and the foaming core (51) slide in the second slide groove (253). The second rack (53) is fixed on the insertion rod (28). The second rack (53) is slidably connected to the spray gun housing (21) along the sliding direction of the insertion rod (28). The gear (54) is rotatably connected to the spray gun housing (21). The first rack (52) and the second rack (53) are respectively meshed with the gear (54); When the insertion rod (28) is inserted into the first annular groove (341), the bottom end of the first rack (52) abuts against the spray gun housing (21), and the foaming core (51) is completely located in the second slide groove (253); when the toggle block (4) hooks the hook block (291) and the trigger (22) is in a pressed state, the foaming core (51) moves into the negative pressure tube (25) and abuts against the inner wall of the negative pressure tube (25) and the second step surface (55).

9. The high-pressure cleaning machine with a novel spray gun structure according to claim 8, characterized in that: A notch groove (57) is provided on the side of the foaming core (51) facing the negative pressure zone, and the notch groove (57) has an inclined surface (571) that is inclined downward toward the side of the kettle body (27).

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