Self-rotating cleaning nozzle capable of regulating speed by magnetic force

Abstract

The utility model discloses a magnetic force speed regulation self-rotation cleaning nozzle, which comprises a central shaft, a shell and a magnetic force speed regulation assembly, one end of the central shaft is provided with a nozzle assembly, the central shaft is rotatably arranged in the shell through a plurality of bearings, one end of the shell is in threaded connection with a base, and the magnetic force speed regulation assembly comprises a magnetic ring. A plurality of magnets are mounted on the outer wall of the magnetic ring, the magnetic ring is fixedly mounted in the middle of the outer wall of the center shaft, a copper ring sleeves the outer side of the magnetic ring, a sliding rod is arranged on the outer wall of the copper ring, a sliding groove matched with the sliding rod is formed in the shell, a rotating ring is rotatably mounted on the outer side of the shell, a spiral groove is formed in the inner wall of the rotating ring, and the spiral groove is matched with the sliding rod. The end, facing the rotating ring, of the sliding rod is in sliding connection with the spiral groove in a matched mode. The rotating speed of the nozzle can be limited and adjusted, so that the nozzle is prevented from being out of control due to overhigh rotating speed, the abrasion rate of the central shaft can be reduced, and the service life of the nozzle is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cleaning nozzle technology, and in particular to a magnetically speed-regulating self-rotating cleaning nozzle. Background Technology

[0002] High-pressure self-rotating cleaning nozzles utilize the centrifugal force and reaction force of water flow to propel the nozzle while spraying water and rotating to clean the items to be cleaned. However, existing self-rotating cleaning nozzles lack an external speed-limiting mechanism on their central shaft. During use, if the nozzle's rotation speed is too high, it can become uncontrollable, far exceeding the normal operating speed, causing a "runaway" phenomenon. This not only hinders cleaning but also makes the central shaft more prone to wear, shortening the nozzle's lifespan. Utility Model Content

[0003] The purpose of this invention is to provide a magnetically speed-regulating self-rotating cleaning nozzle, which can limit and adjust the nozzle's rotation speed, thereby preventing the nozzle from going out of control due to excessive rotation speed, and can also reduce the wear rate of the central shaft and extend the nozzle's service life.

[0004] To achieve the above and other related objectives, this utility model provides a magnetically speed-regulated self-rotating cleaning nozzle, comprising: a central shaft, a housing, and a magnetic speed-regulating assembly. A nozzle assembly is mounted at one end of the central shaft, and a water seal assembly is mounted at the other end. A first channel is provided within the central shaft along its extension direction. The central shaft is rotatably mounted within the housing via several bearings. A base is threadedly connected to the end of the housing away from the nozzle assembly. A connection port is provided at the end of the base away from the housing. A ejector pin assembly passes through the connection port. The ejector pin assembly passes through the water seal assembly at its end facing the central shaft. The end of the magnetic speed regulating component is engaged with the first channel; the magnetic speed regulating component includes a magnetic ring, several magnets are installed on the outer wall of the magnetic ring, a magnetic ring sleeve is fitted on the outer side of the magnetic ring, the magnetic ring is fixedly installed in the middle of the outer wall of the central shaft, a copper ring is fitted on the outer side of the magnetic ring sleeve, a slide rod is provided on the outer wall of the copper ring away from the magnetic ring, a slide groove is provided on the outer shell to engage with the slide rod, the slide rod is slidably installed in the slide groove, the slide groove is arranged along the extension direction of the copper ring, a rotating ring is rotatably installed on the outer side of the outer shell, a spiral groove is provided on the inner wall of the rotating ring, and the end of the slide rod facing the rotating ring is slidably connected to the spiral groove.

[0005] In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, the water seal assembly includes a water seal and a water seal nut. The end of the central shaft away from the nozzle assembly is provided with a first mounting hole. The water seal nut is threadedly connected to the first mounting hole. The water seal is disposed in the first mounting hole. The outer wall of the water seal is slidably connected to the inner wall of the first mounting hole. The water seal is sealed to the water seal nut. The ejector pin assembly passes through the water seal and the water seal nut.

[0006] In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, the water seal has a conical surface at one end facing the water seal nut, and the water seal nut has a conical groove at one end facing the water seal. The conical surface and the conical groove cooperate to form a sealing connection.

[0007] In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, the ejector pin assembly includes an ejector pin and an ejector pin sleeve. A first mounting groove is provided in the base at the end of the housing where the connection port faces. The ejector pin sleeve is installed in the first mounting groove. One end of the ejector pin passes through the ejector pin sleeve, and the other end of the ejector pin passes through the water seal and the water seal nut. A second channel is provided in the ejector pin along the extension direction of the ejector pin, and the second channel cooperates with the first channel.

[0008] In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, a first annular boss is provided on the outer wall of the central shaft on the side away from the nozzle assembly. A first bearing is installed on the outer wall of the central shaft on the side of the first annular boss facing the base. The side wall of the first bearing abuts against the end face of the base. A magnetic ring, a spacer, and two second bearings are sequentially sleeved on the outer wall of the central shaft on the side of the first annular boss away from the base. The two end faces of the magnetic ring abut against one end of the first annular boss and one end of the spacer, respectively. The other end of the spacer abuts against the side wall of one of the second bearings, and the side wall of the other second bearing abuts against the inner wall of the outer shell.

[0009] In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, four magnet mounting slots are evenly distributed on the outer wall of the magnetic ring, and one magnet is installed in each magnet mounting slot. The outer wall of the magnet cooperates with the outer wall of the magnetic ring. One end of the magnetic ring is provided with a second mounting slot, which cooperates with the first annular boss for installation and connection.

[0010] In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, the outer wall of the copper ring is in contact with the inner wall of the outer shell, the inner wall of the copper ring is slidably connected to the outer wall of the magnetic ring sheath, and the copper ring and the spacer are in clearance fit.

[0011] In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, a second annular boss is provided in the middle of the outer wall of the housing, and a third mounting groove is provided at one end of the rotating ring. The third mounting groove is rotatably connected with the second annular boss. The rotating ring is sleeved on the housing, and a retaining ring is sleeved on the outer wall of the housing facing the nozzle assembly. One side wall of the retaining ring abuts against the rotating ring, and the other side wall of the retaining ring abuts against a retaining spring installed at the end of the housing.

[0012] In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, the nozzle assembly includes a nozzle seat, one end of which is threadedly connected to one end of the central shaft, and a plurality of nozzles are mounted on the end face of the other end of the nozzle seat. The plurality of nozzles are respectively connected to the first channel and are eccentrically arranged. A protective cover is mounted on the end face of the nozzle seat away from the central shaft, and the protective cover is fixedly connected to the nozzle seat by a first bolt. The protective cover is provided with a plurality of spray holes that cooperate with the plurality of nozzles.

[0013] This utility model's magnetically speed-regulating self-rotating cleaning nozzle connects to a high-pressure water pipe via a connection port on the base. High-pressure water enters through the connection port, passes through the ejector assembly and the central shaft, and then exits from the nozzle assembly. The water jets from several eccentrically positioned nozzles on the nozzle seat drive the nozzle seat and the central shaft to rotate, achieving the self-rotation function. The water seal assembly effectively improves the sealing performance at the connection between the ejector assembly and the central shaft. The magnetically speed-regulating assembly can adjust and control the rotational speed of the central shaft. According to the law of electromagnetic induction, when the central shaft rotates, it drives the magnetic ring and magnet to rotate. The intersection of the magnetic field and the copper ring generates eddy currents, which produce a magnetic field with the opposite direction of change to the original magnetic field. This eddy currents apply a resistance torque to the rotating magnet, thereby affecting the rotational speed of the central shaft and controlling the rotation of the ring. The spiral groove on the inner wall of the ring drives the slide rod to slide along the groove, thereby adjusting the coverage area of ​​the copper ring and the magnetic ring sheath. Furthermore, the copper ring influences the magnetic ring, changing the magnitude of the magnetic resistance torque and adjusting the rotational speed of the central shaft. This allows it to cope with different complex working conditions. This invention can limit and adjust the rotation speed of the nozzle, thereby preventing the nozzle from going out of control due to excessive rotation speed, and can also reduce the wear rate of the central shaft and extend the service life of the nozzle. Attached Figure Description

[0014] Figure 1 A three-dimensional representation of an embodiment of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model. Figure 1 ;

[0015] Figure 2 A three-dimensional representation of an embodiment of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model. Figure 2 ;

[0016] Figure 3This is a cross-sectional view of an embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0017] Figure 4 This is a partial structural diagram of the magnetic speed control component in one embodiment of the magnetic speed control self-rotating cleaning nozzle of this utility model.

[0018] Figure 5 This is a perspective view of the outer shell in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0019] Figure 6 This is a perspective view of the rotating ring in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0020] Figure 7 This is a schematic diagram of the copper ring structure in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0021] Figure 8 This is a perspective view of the magnetic ring and magnet in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0022] Figure 9 This is a perspective view of the magnetic ring in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model;

[0023] Figure 10 This is a schematic diagram of the water seal assembly and ejector pin assembly in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model.

[0024] Figure 11 This is a schematic diagram of the central shaft structure in one embodiment of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model.

[0025] Component designation:

[0026] 100 Central shaft; 110 Water seal assembly; 111 Water seal; 112 Water seal nut; 120 First channel; 130 First mounting hole; 140 First annular boss; 200 Housing; 210 Base; 211 Connecting port; 220 Ejector assembly; 221 Ejector; 222 Ejector sleeve; 230 Slide groove; 240 Second annular boss; 250 Retaining ring; 260 Snap ring; 300 Magnetic speed regulating assembly; 310 Magnetic ring; 311 Magnet mounting groove; 312 Second mounting groove; 320 Magnet; 330 Magnetic ring sleeve; 340 Copper ring; 341 Slide rod; 350 Rotary ring; 351 Spiral groove; 360 Spacer; 400 Nozzle assembly; 410 Nozzle seat; 420 Nozzle; 430 Protective cover; 431 First bolt; 432 Spray hole; 500 First bearing; 600 Second bearing. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0028] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0029] Please see Figures 1 to 11This utility model provides a magnetically speed-regulated self-rotating cleaning nozzle, comprising: a central shaft 100, a housing 200, and a magnetic speed-regulating assembly 300. A nozzle assembly 400 is mounted at one end of the central shaft 100, and a water seal assembly 110 is mounted at the other end. A first channel 120 is provided inside the central shaft 100 along its extending direction. The central shaft 100 is rotatably mounted within the housing 200 via several bearings. A base 210 is threadedly connected to the end of the housing 200 away from the nozzle assembly 400. A connection port 211 is provided at the end of the base 210 away from the housing 200. A ejector pin assembly 220 passes through the connection port 211. The ejector pin assembly 220, facing the central shaft 100, passes through the water seal assembly 110, and its end engages with the first channel 120. The magnetic speed regulating assembly 300 includes a magnetic ring 310, with several magnets 320 mounted on the outer wall of the magnetic ring 310. A magnetic ring sleeve 330 is fitted over the outer side of the magnetic ring 310. The magnetic ring 310 is fixedly installed in the middle of the outer wall of the central shaft 100. A copper ring 340 is fitted over the outer side of the magnetic ring sleeve 330. A slide rod 341 is provided on the outer wall of the copper ring 340 away from the magnetic ring 310. A groove 230 is provided on the outer shell 200 to cooperate with the slide rod 341. The slide rod 341 is slidably installed in the groove 230, which is arranged along the extension direction of the copper ring 340. A rotating ring 350 is rotatably installed on the outer side of the outer shell 200. A spiral groove 351 is provided on the inner wall of the rotating ring 350. The end of the slide rod 341 facing the rotating ring 350 is slidably connected to the spiral groove 351.

[0030] This invention connects to a high-pressure water pipe via a connection port 211 on the base 210. High-pressure water enters through the connection port 211, then passes through the ejector assembly 220 and the central shaft 100, before being ejected from the nozzle assembly 400. The water jet from the nozzle assembly 400 drives the nozzle assembly 400 and the central shaft 100 to rotate, achieving a self-rotation function. The water seal assembly 110 effectively improves the sealing performance at the connection between the ejector assembly 220 and the central shaft 100. The magnetic speed regulating assembly 300 can adjust and control the rotational speed of the central shaft 100. When the central shaft 100 rotates, it drives the magnetic ring 310 to rotate. According to the law of electromagnetic induction, when the magnet 320 rotates, the magnetic field intersects with the copper ring 340, generating eddy currents. These eddy currents generate a magnetic field with a direction opposite to the original magnetic field, thus applying a resistance torque to the rotating magnet 320, thereby affecting the rotational speed of the central shaft 100. When adjusting the rotation speed of the central shaft 100, the rotating ring 350 is controlled to rotate. The spiral groove 351 on the inner wall of the rotating ring 350 drives the slide rod 341 to slide along the slide groove 230, thereby adjusting the coverage area of ​​the copper ring 340 and the magnetic ring sleeve 330. In turn, the copper ring 340 affects the magnetic ring 310, changing the magnitude of the magnetic field resistance torque and adjusting the rotation speed of the central shaft 100, which can cope with different complex working conditions.

[0031] Please see Figure 3 and Figure 10 In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, the water seal assembly 110 includes a water seal 111 and a water seal nut 112. A first mounting hole 130 is provided at the end of the central shaft 100 away from the nozzle assembly 400. The water seal nut 112 is threadedly connected to the first mounting hole 130. The water seal 111 is disposed within the first mounting hole 130, and the outer wall of the water seal 111 is slidably connected to the inner wall of the first mounting hole 130. The water seal 111 and the water seal nut 112 are sealed together. The ejector pin assembly 220 passes through the water seal 111 and the water seal nut 112. A conical surface is provided at the end of the water seal 111 facing the water seal nut 112, and a conical groove is provided at the end of the water seal nut 112 facing the water seal 111. The conical surface and the conical groove are sealed together. When the first channel 120 is filled with water, the water at the connection between the ejector assembly 220 and the first channel 120 will push the water seal 111 to press against the water seal nut 112, making the surface seal between the water seal 111 and the water seal nut 112 tighter and improving the sealing effect.

[0032] Please see Figure 3In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, the ejector pin assembly 220 includes an ejector pin 221 and an ejector pin sleeve 222. The base 210 at the end of the connection port 211 facing the outer shell 200 is provided with a first mounting groove. The ejector pin sleeve 222 is installed in the first mounting groove. One end of the ejector pin 221 passes through the ejector pin sleeve 222, and the other end of the ejector pin 221 passes through the water seal 111 and the water seal nut 112. A second channel is provided in the ejector pin 221 along the extension direction of the ejector pin 221. The second channel cooperates with the first channel 120.

[0033] Please see Figure 3 and Figure 11 In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, a first annular boss 140 is provided on the outer wall of the central shaft 100 away from the nozzle assembly 400. A first bearing 500 is installed on the outer wall of the central shaft 100 on the side of the first annular boss 140 facing the base 210. The side wall of the first bearing 500 abuts against the end face of the base 210. A magnetic ring 310, a spacer 360 and two second bearings 600 are sequentially sleeved on the outer wall of the central shaft 100 on the side of the first annular boss 140 away from the base 210. The two end faces of the magnetic ring 310 abut against one end of the first annular boss 140 and one end of the spacer 360, respectively. The other end of the spacer 360 abuts against the side wall of one of the second bearings 600, and the side wall of the other second bearing 600 abuts against the inner wall of the outer shell 200.

[0034] The components of this invention are fixed by compression, which facilitates installation and disassembly.

[0035] Please see Figure 4 , Figure 8 and Figure 9 In one example of the magnetically speed-regulating self-rotating cleaning nozzle of this utility model, four magnet mounting slots 311 are evenly distributed on the outer wall of the magnetic ring 310, and one magnet 320 is installed in each magnet mounting slot 311. The outer wall of the magnet 320 mates with the outer wall of the magnetic ring 310. One end of the magnetic ring 310 is provided with a second mounting slot 312, which mates with and is connected to the first annular boss 140. The outer wall of the copper ring 340 fits against the inner wall of the outer shell 200, and the inner wall of the copper ring 340 is slidably connected to the outer wall of the magnetic ring sheath 330. The copper ring 340 and the spacer 360 are in a clearance fit.

[0036] Please see Figures 4 to 6In one example of the magnetic speed-regulating self-rotating cleaning nozzle of this utility model, a second annular boss 240 is provided in the middle of the outer wall of the housing 200, and a third mounting groove is provided at one end of the rotating ring 350. The third mounting groove is rotatably connected to the second annular boss 240. The rotating ring 350 is sleeved on the housing 200. A retaining ring 250 is sleeved on the outer wall of the housing 200 facing the nozzle assembly 400. One side wall of the retaining ring 250 abuts against the rotating ring 350, and the other side wall of the retaining ring 250 abuts against the retaining spring 260 installed at the end of the housing 200.

[0037] Please see Figures 1 to 3 In one example of the magnetically speed-regulated self-rotating cleaning nozzle of this utility model, the nozzle assembly 400 includes a nozzle seat 410. One end of the nozzle seat 410 is threadedly connected to one end of the central shaft 100. A plurality of nozzles 420 are mounted on the end face of the other end of the nozzle seat 410. The plurality of nozzles 420 are respectively connected to the first channel 120. The plurality of nozzles 420 are eccentrically arranged. A protective cover 430 is mounted on the end face of the nozzle seat 410 away from the central shaft 100. The protective cover 430 is fixedly connected to the nozzle seat 410 by a first bolt 431. The protective cover 430 is provided with a plurality of spray holes 432 that cooperate with the plurality of nozzles 420. The water jets from the plurality of eccentrically arranged nozzles 420 on the nozzle seat 410 can drive the nozzle seat 410 and the central shaft 100 to rotate.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A magnetically speed-regulating self-rotating cleaning nozzle, characterized in that, include: A central shaft, with a nozzle assembly installed at one end and a water seal assembly installed at the other end, and a first channel provided inside the central shaft along its extension direction; The housing has a central shaft that is rotatably mounted inside the housing via several bearings. The end of the housing away from the nozzle assembly is threadedly connected to a base. The end of the base away from the housing has a connection port. A ejector pin assembly passes through the connection port. The ejector pin assembly passes through the water seal assembly at the end facing the central shaft. The end of the ejector pin assembly mates with the first channel. A magnetic speed regulating assembly includes a magnetic ring with several magnets mounted on its outer wall. A magnetic ring sheath is fitted over the outer side of the magnetic ring. The magnetic ring is fixedly installed in the middle of the outer wall of a central shaft. A copper ring is fitted over the outer side of the magnetic ring sheath. A slide rod is provided on the outer wall of the copper ring at the end away from the magnetic ring. A groove is provided on the outer shell to cooperate with the slide rod. The slide rod is slidably installed in the groove, which is located along the extension direction of the copper ring. A rotating ring is rotatably installed on the outer side of the outer shell. A spiral groove is provided on the inner wall of the rotating ring. The end of the slide rod facing the rotating ring is slidably connected to the spiral groove.

2. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 1, characterized in that, The water seal assembly includes a water seal and a water seal nut. The central shaft has a first mounting hole at the end away from the nozzle assembly. The water seal nut is threadedly connected to the first mounting hole. The water seal is disposed in the first mounting hole. The outer wall of the water seal is slidably connected to the inner wall of the first mounting hole. The water seal is sealed to the water seal nut. The ejector pin assembly passes through the water seal and the water seal nut.

3. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 2, characterized in that, The water seal has a conical surface at one end facing the water seal nut, and the water seal nut has a conical groove at one end facing the water seal. The conical surface and the conical groove cooperate to form a sealing connection.

4. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 2, characterized in that, The ejector pin assembly includes an ejector pin and an ejector pin sleeve. A first mounting groove is provided in the base at the end of the housing where the connection port faces. The ejector pin sleeve is installed in the first mounting groove. One end of the ejector pin passes through the ejector pin sleeve, and the other end of the ejector pin passes through the water seal and the water seal nut. A second channel is provided inside the ejector pin along the extension direction of the ejector pin, and the second channel cooperates with the first channel.

5. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 1, characterized in that, A first annular boss is provided on the outer wall of the central shaft on the side away from the nozzle assembly. A first bearing is installed on the outer wall of the central shaft on the side of the first annular boss facing the base. The side wall of the first bearing abuts against the end face of the base. A magnetic ring, a spacer, and two second bearings are sequentially sleeved on the outer wall of the central shaft on the side of the first annular boss away from the base. The two end faces of the magnetic ring abut against one end of the first annular boss and one end of the spacer, respectively. The other end of the spacer abuts against the side wall of one of the second bearings, and the side wall of the other second bearing abuts against the inner wall of the outer shell.

6. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 5, characterized in that, Four magnet mounting slots are evenly distributed on the outer wall of the magnetic ring, and one magnet is installed in each magnet mounting slot. The outer wall of the magnet matches the outer wall of the magnetic ring. One end of the magnetic ring is provided with a second mounting slot, which matches and connects with the first annular boss.

7. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 6, characterized in that, The outer wall of the copper ring fits against the inner wall of the outer shell, the inner wall of the copper ring slides and is slidably connected to the outer wall of the magnetic ring sheath, and the copper ring and the spacer are in clearance fit.

8. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 1, characterized in that, The outer wall of the housing is provided with a second annular protrusion in the middle, and one end of the rotating ring is provided with a third mounting groove. The third mounting groove is rotatably connected with the second annular protrusion. The rotating ring is sleeved on the housing. A retaining ring is sleeved on the outer wall of the housing facing the nozzle assembly. One side wall of the retaining ring abuts against the rotating ring, and the other side wall of the retaining ring abuts against a retaining spring installed at the end of the housing.

9. The magnetically speed-regulating self-rotating cleaning nozzle as described in claim 1, characterized in that, The nozzle assembly includes a nozzle seat, one end of which is threaded to one end of the central shaft. A plurality of nozzles are mounted on the end face of the other end of the nozzle seat. The plurality of nozzles are respectively connected to the first channel. The plurality of nozzles are eccentrically arranged. A protective cover is mounted on the end face of the nozzle seat away from the central shaft. The protective cover is fixedly connected to the nozzle seat by a first bolt. The protective cover is provided with a plurality of spray holes that cooperate with the plurality of nozzles.

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