Laser cleaning head and laser cleaning device

Abstract

This application relates to a laser cleaning head and a laser cleaning device. The laser cleaning head includes a housing, a lens assembly, a light-transmitting tube, and a reflective element. The housing encloses a cavity; the lens assembly is located on one side of the housing, through which laser light irradiates the interior of the cavity; one end of the light-transmitting tube is connected to the housing, and the other end extends along the optical axis of the lens assembly, allowing the laser light penetrating the lens assembly to propagate along the light-transmitting tube; a light-exit port is formed on the side wall of the end of the light-transmitting tube furthest from the housing; the reflective element is connected to the light-transmitting tube and reflects the laser light so that it exits from the light-exit port. The light-transmitting tube, along with the reflective element, can rotate relative to the housing around the optical axis of the lens assembly to adjust the emission direction of the laser light exiting from the light-exit port. This method enables the use of laser light to clean the internal structure of an internal combustion engine, effectively improving the cleaning efficiency of the internal structure of the internal combustion engine.

Description

Technical Field

[0001] This application relates to the field of laser equipment technology, and in particular to a laser cleaning head and laser cleaning device. Background Technology

[0002] Automobiles are widely used in production and daily life. With the development of automotive technology, the internal combustion engine, as the core component of a car, drives the vehicle by burning fuel. Over long-term use, unburned carbon and gum deposits accumulate inside the internal combustion engine, causing blockages, especially in the fuel injectors within the combustion chamber, which are more prone to clogging due to their structural characteristics, thus affecting fuel atomization. To avoid performance degradation or malfunctions caused by excessive carbon buildup clogging the internal structures of the internal combustion engine, regular cleaning of its internal components is necessary.

[0003] In related technologies, due to the relatively narrow space inside an internal combustion engine, conventional cleaning devices cannot directly reach the engine's interior to clean its internal structure. Therefore, the current common cleaning method involves disassembling parts or even the entire internal combustion engine to remove the components that need cleaning, and then reassembling them after cleaning to complete the cleaning operation.

[0004] However, the aforementioned method of disassembling the internal combustion engine and then cleaning its internal structure is technically difficult, resulting in low cleaning efficiency and requiring a considerable amount of time for each cleaning session. Therefore, it is essential to develop a cleaning device that can effectively clean the internal structure of an internal combustion engine. Utility Model Content

[0005] Therefore, it is necessary to provide a laser cleaning head and laser cleaning device to address the above problems, which can effectively improve the cleaning efficiency of the internal structure of internal combustion engines.

[0006] On one hand, this application provides a laser cleaning head, which includes:

[0007] The shell encloses and forms a receiving cavity;

[0008] A lens assembly is disposed on one side of the housing, through which the laser beam irradiates the interior of the accommodating cavity;

[0009] A light-transmitting tube, one end of which is connected to the housing, and the other end of which extends along the optical axis of the lens assembly. The laser light passing through the lens assembly can propagate along the light-transmitting tube. A light-exit port is provided on the side wall of the end of the light-transmitting tube away from the housing.

[0010] A reflective element is connected to the light-transmitting tube, and the reflective element is used to reflect the laser so that the laser is emitted from the light-exiting port;

[0011] The light-transmitting tube, together with the reflective element, can rotate relative to the housing around the optical axis of the lens assembly to adjust the emission direction of the laser emitted from the light-emitting port.

[0012] In some embodiments, the laser cleaning head further includes an air intake assembly, which includes an air intake connector and an air intake pipe. The air intake connector is connected to the housing, and an air intake channel is provided inside the air intake connector. One end of the air intake pipe is connected to the air intake connector and communicates with the air intake channel, and the other end is connected to the accommodating cavity.

[0013] In some embodiments, the side wall of the housing is provided with an air inlet, which communicates with the accommodating cavity; the air inlet pipe extends into the cavity of the light-transmitting tube.

[0014] In some embodiments, the laser cleaning head further includes a filter screen that covers the air inlet.

[0015] In some embodiments, the lens assembly includes a lens barrel and a plurality of lenses, the lens barrel being detachably connected to the housing, and the plurality of lenses being disposed within the lens barrel along the optical axis.

[0016] In some embodiments, the laser cleaning head further includes a rotating mechanism, which is sleeved on the outer periphery of the light-transmitting tube and connected to the light-transmitting tube. The light-transmitting tube is rotatably connected to the housing through the rotating mechanism.

[0017] In some embodiments, the rotating mechanism includes a rotating cylinder and a retaining ring. The inner wall of the rotating cylinder has an internal thread, and the outer wall of the light-transmitting tube has an external thread. The rotating cylinder is sleeved on the outer periphery of the light-transmitting tube and threadedly connected to the light-transmitting tube. The rotating cylinder includes an abutting section and an mounting section. The outer diameter of the abutting section is larger than the outer diameter of the mounting section. The side wall of the housing has a through hole corresponding to the lens assembly. The mounting section is inserted into the through hole, and the abutting section abuts against the outer wall of the housing. The end of the mounting section away from the abutting section has a snap-fit ​​groove, and the retaining ring snaps into the snap-fit ​​groove and abuts against the inner wall of the housing.

[0018] In some embodiments, the rotating mechanism further includes a fixed cylinder and a washer. The fixed cylinder is sleeved on the outer periphery of the light-transmitting tube and located on the side of the abutment section away from the mounting section. The fixed cylinder is fixedly connected to the light-transmitting tube. The washer is sleeved on the outer periphery of the light-transmitting tube and sandwiched between the fixed cylinder and the rotating cylinder.

[0019] In some embodiments, the reflecting element includes a mirror disposed at the end of the light-transmitting tube away from the housing; the surface of the mirror is inclined relative to the length direction of the light-transmitting tube and is positioned corresponding to the light-emitting port to reflect the laser light so that the laser light is emitted from the light-emitting port.

[0020] Alternatively, the reflective element includes a cylindrical mirror body disposed within the cavity of the light-transmitting tube and located at the end of the light-transmitting tube away from the housing. The cylindrical mirror body is inclined relative to the length direction of the light-transmitting tube on the side facing the housing and is positioned corresponding to the light-emitting port to reflect the laser so that the laser is emitted from the light-emitting port.

[0021] On the other hand, this application also provides a laser cleaning device, which includes a laser cleaning head as described above. The laser cleaning device also includes a laser emitter, which is disposed corresponding to the laser cleaning head, such that the laser emitted by the laser emitter irradiates the lens assembly.

[0022] The aforementioned laser cleaning head and device, comprising a lens assembly, housing, light-transmitting tube, and reflective element, are arranged sequentially along the laser irradiation direction. The laser enters the housing through the lens assembly and irradiates the light-transmitting tube. The laser then travels along the light-transmitting tube to the reflective element, which refracts or reflects the laser, causing it to exit through the light outlet. In use, the light-transmitting tube can be inserted into the internal combustion engine. Because the light-transmitting tube can rotate relative to the housing around the optical axis of the lens assembly, it ensures that the laser irradiates the reflective element as it rotates. Simply rotate the light-transmitting tube to align the light outlet with the fuel injector to be cleaned, allowing the laser to irradiate the area inside the internal combustion engine to remove carbon deposits and other build-up. This eliminates the need to disassemble the internal combustion engine, thus improving cleaning efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a laser cleaning head according to an embodiment of this application.

[0024] Figure 2 This is a disassembly diagram of a laser cleaning head according to an embodiment of this application.

[0025] Figure 3 This is a cross-sectional view of a laser cleaning head according to an embodiment of this application, along the plane containing the housing axis, showing a schematic diagram of the internal connection structure of the housing.

[0026] Figure 4 This is a schematic diagram of the housing structure in a laser cleaning head according to an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the rotating cylinder in a laser cleaning head according to an embodiment of this application.

[0028] In the diagram, 100 is the housing; 101 is the accommodating cavity; 102 is the air inlet; 103 is the through hole; 200 is the lens assembly; 210 is the lens barrel; 220 is the lens; 300 is the light tube; 301 is the light outlet; 400 is the reflecting element; 410 is the cylindrical lens body; 500 is the air inlet assembly; 510 is the air inlet connector; 511 is the air inlet channel; 520 is the air inlet pipe; 600 is the filter screen; 700 is the rotating mechanism; 710 is the rotating cylinder; 711 is the abutment section; 712 is the mounting section; 7121 is the snap-fit ​​groove; 720 is the snap ring; 730 is the fixing cylinder; and 740 is the washer. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a laser cleaning head according to one embodiment of this application is shown. Figure 2A disassembled structural diagram of a laser cleaning head according to an embodiment of this application is shown. One embodiment of this application provides a laser cleaning head, which includes a housing 100, a lens assembly 200, a light-transmitting tube 300, and a reflective element 400. The housing 100 encloses a receiving cavity 101. The lens assembly 200 is disposed on one side of the housing 100, and the laser light passes through the lens assembly 200 to irradiate the interior of the receiving cavity 101. One end of the light-transmitting tube 300 is connected to the housing 100, and the other end extends along the optical axis of the lens assembly 200. The laser light penetrating the lens assembly 200 can propagate along the light-transmitting tube 300. A light-exit port 301 is formed on the sidewall of the end of the light-transmitting tube 300 away from the housing 100. The reflective element 400 is connected to the light-transmitting tube 300 and is used to reflect the laser light so that the laser light is emitted from the light-exit port 301. The light tube 300 can rotate relative to the housing 100 around the optical axis of the lens assembly 200, along with the reflective element 400, to adjust the emission direction of the laser emitted from the light outlet 301.

[0036] The lens assembly 200 is located on one side of the housing 100, and the light-transmitting tube 300 is positioned opposite the lens assembly 200 and connected to the other side of the housing 100. This allows the laser to propagate along the path from the lens assembly 200, the accommodating cavity 101, the light-transmitting tube 300, the reflecting element 400 to the light-emitting port 301, thereby altering the laser's irradiation path. Since the light-transmitting tube 300 is a slender tubular structure, it can extend into the interior of the internal combustion engine. The laser can ultimately be emitted from the light-emitting port 301 to irradiate the internal structure of the internal combustion engine (such as the fuel injector), thus cleaning the internal structure. For ease of description, the internal structure of the internal combustion engine will be illustrated using the fuel injector as an example in the following text. The light-transmitting tube 300 and the reflecting element 400 can rotate around the optical axis of the lens assembly 200. When the light-transmitting tube 300 is rotated, the laser passing through the lens assembly 200 always irradiates the light-transmitting tube 300 and the reflecting element 400. At this time, the orientation of the light-emitting port 301 changes, so that the laser emission direction changes with the orientation of the light-emitting port 301, so as to adjust the irradiation direction of the laser according to the position of the fuel injector.

[0037] In use, the end of the light-transmitting tube 300 furthest from the housing 100 is extended into the interior of the internal combustion engine. The laser irradiates the lens assembly 200, passes through the lens assembly 200, enters the receiving cavity 101, and irradiates the light-transmitting tube 300. At this time, the propagation direction of the laser is the same as the length direction of the light-transmitting tube 300. The laser irradiates the reflecting element 400 along the length direction of the light-transmitting tube 300. After refraction or reflection by the reflecting element 400, the laser is emitted from the light outlet 301. If the laser does not irradiate the fuel injector, the light-transmitting tube 300 can be rotated to change the orientation of the light outlet 301, thereby changing the irradiation direction of the laser. Rotating the light-transmitting tube 300 allows the laser to irradiate the position of the fuel injector. At this time, stop rotating the light-transmitting tube 300 to clean the fuel injector.

[0038] It should be noted that fuel injectors are typically located on the side wall of an internal combustion engine with an opening. The position of the fuel injector does not correspond to the opening of the engine; that is, the fuel injector cannot be directly observed from the engine opening. By extending a light-transmitting tube 300 from the engine opening into the engine's interior, and then reflecting or refracting the laser light through a reflecting element 400, the laser can be directed to the fuel injector location. Other structures within the internal combustion engine are arranged similarly to the fuel injector and will not be elaborated upon here.

[0039] Therefore, the laser cleaning head of this application can irradiate the interior of an internal combustion engine with laser light to clean the fuel injectors. Since the light-transmitting tube 300, along with the reflective element 400, can rotate relative to the housing 100 around the optical axis of the lens assembly 200 to adjust the emission direction of the laser emitted from the light outlet 301, rotating the light-transmitting tube 300 changes the irradiation direction of the laser, ensuring that the laser can irradiate the internal structures of the internal combustion engine, such as the fuel injectors. This allows for cleaning of the internal structure of the internal combustion engine without disassembling it, making the operation simple and convenient, with high cleaning efficiency and excellent cleaning effect.

[0040] Furthermore, the reflective element 400 is detachably connected to the light-transmitting tube 300. A suitable reflective element 400 can be selected according to the actual usage (fuel injector position and internal combustion engine size) to make the laser irradiate the fuel injector position with a suitable refraction angle or reflection angle.

[0041] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the laser cleaning head further includes an air intake assembly 500, which includes an air intake connector 510 and an air intake pipe 520. The air intake connector 510 is connected to the housing 100, and an air intake channel 511 is provided inside the air intake connector 510. One end of the air intake pipe 520 is connected to the air intake connector 510 and communicates with the air intake channel 511, and the other end is connected to the accommodating cavity 101.

[0042] An air inlet connector 510 is connected to the side wall of the housing 100, and an air inlet pipe 520 penetrates the side wall of the housing 100, connecting the accommodating cavity 101 with the air inlet channel 511. Through this arrangement, gas can enter the accommodating cavity 101 through the air inlet channel 511 and the air inlet pipe 520, thereby dissipating heat from the housing 100. Furthermore, during use, gas is introduced into the accommodating cavity 101 through the air inlet assembly 500, and the gas introduced into the accommodating cavity 101 is discharged through the light outlet 301 to reduce the temperature of the housing 100 and the light-transmitting pipe 300.

[0043] In addition, the air intake assembly 500 also includes an air supply device (not shown in the figure), such as an air pump. The air supply device is connected to the air intake channel 511. The gas supplied by the air supply device flows sequentially through the air intake channel 511 and the air intake pipe 520 into the accommodating cavity 101, thereby cooling the housing 100.

[0044] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the side wall of the housing 100 is provided with an air inlet 102, which communicates with the accommodating cavity 101. The air inlet pipe 520 extends into the cavity of the light transmission pipe 300.

[0045] The air intake pipe 520 has an L-shaped structure. One end of the air intake pipe 520 is connected to the air intake channel 511, and the other end extends into the light transmission tube 300. It should be noted that the airflow enters the light transmission tube 300 through the air intake pipe 520 and forms an airflow towards the light outlet 301. At this time, the gas in the accommodating cavity 101 flows towards the light transmission tube 300 under the influence of the airflow and flows out from the light outlet 301 with the airflow. A negative pressure is formed in the accommodating cavity 101, allowing air from outside the housing 100 to enter the accommodating cavity 101 through the air intake hole 102, forming an airflow circulation to continuously dissipate heat from the housing 100. Through the above arrangement, a stable airflow can be formed in the accommodating cavity 101 and the light transmission tube 300, dissipating heat and cooling the housing 100 and the light transmission tube 300, preventing damage to the housing 100 and the light transmission tube 300 due to high temperatures.

[0046] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the laser cleaning head also includes a filter 600, which covers the air inlet 102.

[0047] When air from outside the housing 100 enters the accommodating cavity 101 through the air inlet 102, it passes through the filter 600, which filters out dust and other impurities from the air. This design prevents impurities from accumulating inside the accommodating cavity and affecting light transmission or damaging structures such as the lens assembly 200.

[0048] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the lens assembly 200 includes a lens barrel 210 and a plurality of lenses 220. The lens barrel 210 is detachably connected to the housing 100, and the plurality of lenses 220 are disposed within the lens barrel 210 along the optical axis.

[0049] The lens barrel 210 is detachably connected to the housing 100 and can be replaced and installed as needed, making operation simple and convenient. The lens assembly 200 includes a convex lens and a concave lens. By adjusting the distance between the two lenses, the incident laser beam can be refracted by the two lenses to form a beam coaxial with the light tube 300, allowing the laser to irradiate the end of the light tube 300 away from the housing 100. The aforementioned configuration of the convex and concave lenses is existing technology and will not be elaborated further here. Through the above configuration, the laser can propagate along the light tube 300, avoiding laser loss caused by the laser irradiating the inner wall of the housing 100 or the inner wall of the light tube 300.

[0050] It should be noted that the above embodiment is only one feasible embodiment and does not impose specific limitations on the technical solution. The multiple lenses 220 may also include plane mirrors, other convex lenses and other concave lenses, as long as it is ensured that the generated beam is coaxial with the light tube 300 and the illumination area is smaller than the cross-sectional area of ​​the light tube 300 cavity, so as to ensure that the laser can propagate along the light tube 300.

[0051] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the laser cleaning head further includes a rotating mechanism 700, which is sleeved on the outer periphery of the light-transmitting tube 300 and connected to the light-transmitting tube 300. The light-transmitting tube 300 is rotatably connected to the housing 100 through the rotating mechanism 700.

[0052] The light-transmitting tube 300 is rotatably connected to the housing 100 via a rotating mechanism 700, which can be a rotating bearing, ball bearing, etc. This arrangement allows the light-transmitting tube 300 to rotate around the optical axis of the lens assembly 200, thereby changing the orientation of the light-emitting port 301.

[0053] See Figures 1 to 5 In some embodiments, the rotating mechanism 700 includes a rotating cylinder 710 and a retaining ring 720. The inner wall of the rotating cylinder 710 has an internal thread, and the outer wall of the light-transmitting tube 300 has an external thread. The rotating cylinder 710 is sleeved on the outer periphery of the light-transmitting tube 300 and threadedly connected to the light-transmitting tube 300. The rotating cylinder 710 includes an abutting section 711 and a mounting section 712. The outer diameter of the abutting section 711 is larger than the outer diameter of the mounting section 712. The side wall of the housing 100 has a through hole 103 corresponding to the lens assembly 200. The mounting section 712 is inserted into the through hole 103, and the abutting section 711 abuts against the outer wall of the housing 100. The end of the mounting section 712 away from the abutting section 711 has a locking groove 7121. The retaining ring 720 is locked into the locking groove 7121 and abuts against the inner wall of the housing 100.

[0054] An external thread is provided at one end of the light-transmitting tube 300 near the housing 100. The mounting section 712 is inserted into the through hole 103, allowing the rotating cylinder 710 and the light-transmitting tube 300 to rotate around their own axis. The abutting section 711 abuts against the outer wall of the housing 100, and the snap ring 720 is engaged in the snap-fit ​​groove 7121 and abuts against the inner wall of the housing 100. The snap ring 720 and the abutting section 711 confine the mounting section 712 within the through hole 103. That is, when the mounting section 712 is inserted into the through hole 103, the snap ring 720 and the abutting section 711 can restrict the rotating cylinder 710 from moving along the depth direction of the through hole 103, thereby preventing the light-transmitting tube 300 and the rotating cylinder 710 from disengaging from the through hole 103.

[0055] During installation, the light-transmitting tube 300 is threadedly connected to the rotating cylinder 710, so that the rotating cylinder 710 is fitted around the outer periphery of the light-transmitting tube 300. The mounting section 712 is inserted into the through hole 103, so that the abutting section 711 abuts against the outer wall of the housing 100. At this time, the snap ring 720 is snapped into the snap groove 7121, thereby confining the rotating cylinder 710 and the light-transmitting tube 300 within the through hole 103.

[0056] The above settings ensure a stable connection between the light tube 300 and the housing 100, and make the installation and disassembly process simple and convenient.

[0057] See Figures 1 to 5 In some embodiments, the rotating mechanism 700 further includes a fixed cylinder 730 and a washer 740. The fixed cylinder 730 is sleeved on the outer periphery of the light-transmitting tube 300 and located on the side of the abutment section 711 away from the mounting section 712. The fixed cylinder 730 is fixedly connected to the light-transmitting tube 300. The washer 740 is sleeved on the outer periphery of the light-transmitting tube 300 and sandwiched between the fixed cylinder 730 and the rotating cylinder 710.

[0058] A fixing cylinder 730 is sleeved on the outer periphery of the light-transmitting tube 300. In some preferred embodiments, the fixing cylinder 730 is connected to the light-transmitting tube 300 by screws. Specifically, a threaded hole is provided on the outer side wall of the light-transmitting tube 300, and the screw is threaded into the threaded hole to fix the fixing cylinder 730 to the light-transmitting tube 300. A washer 740 is disposed between the abutting section 711 and the fixing cylinder 730, and both the fixing cylinder 730 and the abutting section 711 are in contact with the washer 740. For ease of understanding, when the light-transmitting tube 300 needs to be rotated, the operator manually drives the abutting section 711 to rotate. There is friction between the abutting section 711 and the washer 740, so rotating the abutting section 711 can drive the washer 740, the fixing cylinder 730, and the light-transmitting tube 300 to rotate synchronously. With the above configuration, the rotating cylinder 710 rubs against the washer 740 when it rotates, thereby driving the fixed cylinder 730 and the light-transmitting tube 300 to rotate. This reduces the friction between the internal and external threads, thereby reducing wear on the internal and external threads. Furthermore, during long-term use, the abutting section 711 rubs against the washer 740. When the washer 740 is damaged, only the washer 740 needs to be replaced. This effectively reduces wear on the abutting section 711 and the fixed cylinder 730, and improves their service life.

[0059] It should be further explained that during installation, the light-transmitting tube 300 is first threadedly connected to the rotating cylinder 710, and then the washer 740 and the fixing cylinder 730 are successively fitted onto the outer circumference of the light-transmitting tube 300, and the fixing cylinder 730 is connected to the light-transmitting tube 300.

[0060] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the reflecting element 400 includes a reflector (not shown) disposed at the end of the light-transmitting tube 300 away from the housing 100. The surface of the reflector is inclined relative to the length direction of the light-transmitting tube 300 and is positioned corresponding to the light-emitting port 301 to reflect the laser so that the laser is emitted from the light-emitting port 301. Alternatively, the reflecting element 400 includes a cylindrical mirror body 410 disposed within the cavity of the light-transmitting tube 300 and located at the end of the light-transmitting tube 300 away from the housing 100. The side of the cylindrical mirror body 410 facing the housing 100 is inclined relative to the length direction of the light-transmitting tube 300 and is positioned corresponding to the light-emitting port 301 to reflect the laser so that the laser is emitted from the light-emitting port 301.

[0061] See Figure 1 , Figure 2 and Figure 3In some preferred embodiments, the reflective element 400 is a cylindrical mirror 410, the diameter of which corresponds to the diameter of the cavity of the light-transmitting tube 300. The cylindrical mirror 410 can be inserted into the cavity of the light-transmitting tube 300. It should be noted that the cylindrical mirror 410 is located at the end of the light-transmitting tube 300 away from the housing 100. During installation, the cylindrical mirror 410 is placed into the cavity of the light-transmitting tube 300 through the light-emitting port 301 and inserted into the cavity to complete the fixation. When laser light shines along the light-transmitting tube 300 onto the cylindrical mirror 410, the cylindrical mirror 410 reflects the laser light, causing it to exit from the light-emitting port 301. With the above configuration, reflective elements with different tilt angles can be replaced according to actual conditions, and the operation of assembling and disassembling the reflective element 400 is simple and convenient.

[0062] On the other hand, this application also provides a laser cleaning device, which includes a laser cleaning head as described above, and a laser emitter (not shown in the figure). The laser emitter is disposed corresponding to the laser cleaning head, such that the laser emitted by the laser emitter irradiates the lens assembly 200.

[0063] A laser emitter is correspondingly positioned to the lens assembly 200. The laser emitted by the laser emitter illuminates the lens assembly 200, and then, through the lens assembly 200 and the reflective element 400, finally illuminates the fuel injector position to achieve cleaning of the fuel injector. With the above configuration, the fuel injector can be cleaned without disassembling the internal combustion engine structure.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A laser cleaning head, characterized in that, include: The shell encloses and forms a receiving cavity; A lens assembly is disposed on one side of the housing, through which the laser beam irradiates the interior of the accommodating cavity; A light-transmitting tube, one end of which is connected to the housing, and the other end of which extends along the optical axis of the lens assembly. The laser light passing through the lens assembly can propagate along the light-transmitting tube. A light-exit port is provided on the side wall of the end of the light-transmitting tube away from the housing. A reflective element is connected to the light-transmitting tube, and the reflective element is used to reflect the laser so that the laser is emitted from the light-exiting port; The light-transmitting tube, together with the reflective element, can rotate relative to the housing around the optical axis of the lens assembly to adjust the emission direction of the laser emitted from the light-emitting port.

2. The laser cleaning head according to claim 1, characterized in that, It also includes an air intake assembly, which includes an air intake connector and an air intake pipe. The air intake connector is connected to the housing, and an air intake channel is provided inside the air intake connector. One end of the air intake pipe is connected to the air intake connector and communicates with the air intake channel, and the other end is connected to the accommodating cavity.

3. The laser cleaning head according to claim 2, characterized in that, The side wall of the housing is provided with an air inlet, which is connected to the accommodating cavity; the air inlet pipe extends into the cavity of the light-transmitting tube.

4. The laser cleaning head according to claim 3, characterized in that, The laser cleaning head also includes a filter screen, which is placed over the air inlet.

5. The laser cleaning head according to claim 1, characterized in that, The lens assembly includes a lens barrel and multiple lenses. The lens barrel is detachably connected to the housing, and the multiple lenses are arranged inside the lens barrel along the optical axis.

6. The laser cleaning head according to claim 1, characterized in that, It also includes a rotating mechanism, which is sleeved on the outer periphery of the light-transmitting tube and connected to the light-transmitting tube. The light-transmitting tube is rotatably connected to the housing through the rotating mechanism.

7. The laser cleaning head according to claim 6, characterized in that, The rotating mechanism includes a rotating cylinder and a retaining spring. The inner wall of the rotating cylinder is provided with an internal thread, and the outer wall of the light-transmitting tube is provided with an external thread. The rotating cylinder is sleeved on the outer circumference of the light-transmitting tube and threadedly connected to the light-transmitting tube. The rotating cylinder includes an abutting section and an mounting section. The outer diameter of the abutting section is larger than the outer diameter of the mounting section. The side wall of the housing has a through hole corresponding to the lens assembly. The mounting section is inserted into the through hole, and the abutting section abuts against the outer wall of the housing. The end of the mounting section away from the abutting section has a retaining groove. The retaining spring is engaged in the retaining groove and abuts against the inner wall of the housing.

8. The laser cleaning head according to claim 7, characterized in that, The rotating mechanism further includes a fixed cylinder and a washer. The fixed cylinder is sleeved on the outer periphery of the light-transmitting tube and located on the side of the abutment section away from the installation section. The fixed cylinder is fixedly connected to the light-transmitting tube. The washer is sleeved on the outer periphery of the light-transmitting tube and sandwiched between the fixed cylinder and the rotating cylinder.

9. The laser cleaning head according to any one of claims 1-8, characterized in that, The reflective element includes a reflector disposed at the end of the light-transmitting tube away from the housing; the surface of the reflector is inclined relative to the length direction of the light-transmitting tube and is positioned corresponding to the light-emitting port to reflect the laser light so that the laser light is emitted from the light-emitting port. Alternatively, the reflective element includes a cylindrical mirror body disposed within the cavity of the light-transmitting tube and located at the end of the light-transmitting tube away from the housing. The cylindrical mirror body is inclined relative to the length direction of the light-transmitting tube on the side facing the housing and is positioned corresponding to the light-emitting port to reflect the laser so that the laser is emitted from the light-emitting port.

10. A laser cleaning device, characterized in that, The laser cleaning device includes a laser cleaning head as described in any one of claims 1-9, and further includes a laser emitter, which is disposed corresponding to the laser cleaning head such that the laser emitted by the laser emitter irradiates the lens assembly.

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