Cleaning tool for profile grooves

Abstract

The invention provides a cleaning tool for a profile groove, which comprises a handle component, a first air flow channel, a first air flow channel and a second air flow channel, and is characterized in that the handle component is axially provided with the first air flow channel; the rear end of the connecting rod is fixedly connected to the handle assembly, and the interior of the connecting rod is hollow to form a second airflow channel communicated with the first airflow channel; the cleaning head is fixedly connected to the front end of the connecting rod; wherein a scale scraping curved surface matched with the outline of the inner wall of a groove of a to-be-cleaned profile is formed on the front end face of the cleaning head, a positioning guide groove is formed in the side, away from the scale scraping curved surface, of the cleaning head in a sunken mode, and the positioning guide groove is used for being matched with a guide rail on the to-be-cleaned profile in shape; the second airflow channel extends into the cleaning head and communicates with an airflow jet orifice formed in the cleaning head. The positioning guide groove is formed in the back of the cleaning head, self-guiding is achieved through a guide rail of a profile, and the positioning problem during blind operation is solved.

Description

Technical Field

[0001] This invention relates to the field of rail transit vehicles, and in particular to a cleaning tool for profile grooves. Background Technology

[0002] In the manufacturing and maintenance of rail transit vehicles, aluminum alloy profiles with complex cross-sections are extensively used in the car body structure to meet the requirements of installing skirts, suspension equipment, or wiring. These profiles are typically designed with deep grooves extending along their length, guide rails, or inverted structures. During long-term train operation, dust, rainwater, and metallic dust from the external environment can easily enter these grooves. Because the grooves are usually narrow at the opening and deep inside, the accumulated dust mixes with rainwater to form stubborn grime, which adheres to the dead corners or guide surfaces of the grooves. If not cleaned in time, this grime will not only hinder the installation of subsequent equipment (such as preventing the skirts from closing), but may also corrode the profiles, affecting the safe operation of the train.

[0003] Existing cleaning methods typically involve manual wiping with general-purpose tools or rinsing with high-pressure water guns. However, the direct water jet from a high-pressure water gun struggles to reach the indented corners inside the grooves, and water splashing can easily contaminate surrounding precision equipment. To address the cleaning or fitting challenges of surfaces with specific shapes, some contour-designed tools have emerged in the prior art. For example, Chinese patent application CN103204139A discloses a drum-shaped door brush for urban rail vehicles and its manufacturing method. This solution involves cutting a V-shaped notch in the brush profile and bending it to create a curved brush holder that matches the radius of curvature (R740mm) of the drum-shaped part of the door, and then embedding the brush within the groove. This solution achieves the fitting of the brush to the surface of the highly curved door through structural deformation.

[0004] However, the aforementioned prior art has significant structural defects when applied to the specific task of cleaning profile grooves in this field. First, the prior art only focuses on the macroscopic fit of the static shape, lacking a precise guiding structure during movement. When used to clean slender profile grooves, operators must rely on hand strength to control the depth and angle of the tool. Due to the lack of limiting features that cooperate with the internal guide rails of the groove, the tool is prone to vertical movement or horizontal deflection during movement, causing the cleaning brush head to detach from the working surface and failing to guarantee consistent cleaning. Second, the prior art relies solely on the physical friction of the brush for passive cleaning. For damp and hardened dirt deep in the groove, the bristles alone are insufficient to completely remove it. Furthermore, the structure does not integrate any active chip removal mechanism (such as airflow blowing), and the removed dirt easily accumulates in the groove or is repeatedly rubbed by the bristles, causing secondary pollution. In addition, the prior art is completely open, without any protective shielding structure. During cleaning operations, the dust or splattered dirt will directly hit the operator, creating a harsh working environment.

[0005] Therefore, there is an urgent need to develop a specialized cleaning tool that can utilize the profile's own structure for self-guidance, integrate mechanical scraping and pneumatic blowing, and has good protective functions to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a cleaning tool for profile grooves, in order to solve the problems of existing cleaning tools being unable to accurately locate, difficult to remove deep-seated dirt, and lacking protective measures.

[0007] To achieve the above objectives, the present invention provides a cleaning tool for profile grooves, comprising: a handle assembly having a first airflow channel extending axially inside; a connecting rod having its rear end fixedly connected to the handle assembly, the connecting rod having a hollow interior forming a second airflow channel communicating with the first airflow channel; and a cleaning head fixedly connected to the front end of the connecting rod; wherein the front end face of the cleaning head forms a scraping curved surface that matches the contour of the inner wall of the groove of the profile to be cleaned, and the cleaning head has a positioning guide groove recessed on the side opposite to the scraping curved surface, the positioning guide groove being used to fit with the shape of a guide rail on the profile to be cleaned; the second airflow channel extends into the interior of the cleaning head and communicates with an airflow nozzle provided on the cleaning head.

[0008] The beneficial effects of the above structure are as follows: By setting a positioning guide groove on the back of the cleaning head that matches the shape of the profile guide rail, the tool, after being inserted into the groove, can form a slider-guide rail type engagement using the structural features of the profile itself. This engagement restricts the cleaning head's freedom of movement in the direction perpendicular to the groove length, preventing vertical movement or horizontal deflection during operation and ensuring that the scraping surface remains in close contact with the inner wall of the groove. Simultaneously, the through-flow airflow channel and the integrated spray nozzle on the cleaning head allow the tool to spray high-pressure gas while performing mechanical scraping, achieving simultaneous "scraping and peeling" and "air blowing and chip removal," significantly improving cleaning efficiency.

[0009] Preferably, the air jet nozzle is located on the side wall of the cleaning head, and the jet direction of the air jet nozzle is tilted towards the side where the scraping surface is located, so that the air jet from the air jet nozzle can be directed to the bottom of the groove of the profile to be cleaned.

[0010] The beneficial effect of the above structure is that the angled nozzles generate airflow with a specific attack angle, which directly targets the deepest dead zones of the trench, rather than impacting the trench sidewalls vertically. This helps to quickly disperse and carry away stubborn dirt that has just been removed by the mechanical scraper, preventing dirt from accumulating again at the bottom of the trench.

[0011] Preferably, the second airflow channel has a cross-sectional contraction section near the airflow nozzle, and the inner diameter of the cross-sectional contraction section is smaller than the inner diameter of the rest of the second airflow channel.

[0012] The beneficial effect of the above structure is that it utilizes the Venturi effect in fluid mechanics to instantly accelerate the airflow at the outlet through the cross-sectional contraction section. The high-speed airflow has stronger kinetic energy and impact force, which can effectively break up hardened dirt or sticky mixtures, solving the problem that it is difficult to remove adhesive dirt by relying solely on mechanical force.

[0013] Preferably, the positioning guide groove is a semi-circular or arc-shaped groove extending along the width direction of the cleaning head.

[0014] The beneficial effects of the above structure are that the semi-circular or arc-shaped groove design can be adapted to common profile protrusions (such as cylindrical guide rails with hinge structures), increasing the contact area, making the sliding process smoother and more stable, and reducing tool wear caused by stress concentration.

[0015] Preferably, it also includes a dust cover plate, which is positioned above the cleaning head, and the coverage width of the dust cover plate is greater than the width of the cleaning head and the groove opening width of the profile to be cleaned.

[0016] The beneficial effect of the above structure is that the large dustproof plate forms a physical barrier above the trench opening, which can effectively intercept dust and splashing particles raised by the high-pressure airflow, preventing them from directly hitting the operator's face or polluting the surrounding environment.

[0017] Preferably, the dust cover is rotatably connected to the front end of the cleaning head or connecting rod via fasteners, so that the angle of the dust cover relative to the cleaning head is adjustable.

[0018] The beneficial effects of the above structure are that the adjustable angle design allows the dust cover to adapt to different operating postures (such as changes in the grip angle of the handle due to differences in the height of the operator) or to grooves of different depths, ensuring that the dust cover can tightly cover the groove openings under various working conditions.

[0019] Preferably, the dustproof plate is an arc-shaped plate with the concave surface of the arc-shaped plate facing the cleaning head, so as to form an airflow guiding cavity between the dustproof plate and the profile to be cleaned.

[0020] The beneficial effect of the above structure is that the concave arc surface not only blocks the airflow but also guides it. It guides the turbulent airflow and dust rebounding from the trench downwards or along the longitudinal direction of the trench, forming a directional slag discharge path and preventing dust from scattering and escaping.

[0021] Preferably, there is an angle between the axis of the connecting rod and the axis of the handle assembly; the outer contour of the handle assembly is a drum-shaped structure that tapers at both ends and bulges in the middle.

[0022] The advantages of the above structure are as follows: the angle setting allows the handle to be positioned above the groove plane, providing safe space for the operator's hands and preventing the hands from scratching the edges of the profile during pushing and pulling; the drum-shaped handle is ergonomic, fits the palm, is easy to apply force, and is less tiring.

[0023] Preferably, the cleaning head and the connecting rod are integrally formed; the tail end of the handle assembly is provided with an air pipe connector for connecting to an external air source, and the air pipe connector is coaxially connected to the first airflow channel.

[0024] The advantages of the above structure are as follows: the one-piece molding structure eliminates connection points, significantly improves the structural strength between the cleaning head and the connecting rod, and prevents breakage when forcefully scraping away hard dirt; the coaxial air intake design at the tail makes the air tube move with the handle, making it less prone to tangling and more flexible to operate.

[0025] In summary, this invention solves the positioning problem during blind operation by setting a positioning guide groove on the back of the cleaning head and using the guide rail of the profile itself to achieve self-guidance; combined with directional accelerating airflow and mechanical scraping, it achieves thorough removal of stubborn dirt in deep groove corners; and with the follow-up dustproof plate, it effectively blocks dust and significantly improves work efficiency and safety. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a cleaning tool for profile grooves according to an embodiment of the present invention.

[0027] Figure 2 This is a side cross-sectional view of the cleaning head and the profile according to one embodiment of the present invention.

[0028] Figure 3 This is a front view structural diagram of a cleaning head according to an embodiment of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0030] like Figures 1 to 3 As shown, the present invention provides a cleaning tool for profile grooves, including a handle assembly 1, a connecting rod 2, and a cleaning head 3. The handle assembly 1 has a first airflow channel 11 extending axially inside. The rear end of the connecting rod 2 is fixedly connected to the handle assembly 1, and the interior of the connecting rod 2 is hollow, forming a second airflow channel 21 communicating with the first airflow channel 11. The cleaning head 3 is fixedly connected to the front end of the connecting rod 2.

[0031] like Figure 2As shown, the front end face of the cleaning head 3 has a scraping curved surface 31 that matches the contour of the inner wall of the groove 51 of the profile 5 to be cleaned. A positioning guide groove 32 is recessed on the side of the cleaning head 3 opposite to the scraping curved surface 31, and the positioning guide groove 32 is used to mate with the shape of the guide rail on the profile 5 to be cleaned. The second airflow channel 21 extends into the interior of the cleaning head 3 and connects to the airflow nozzle 33 provided on the cleaning head 3.

[0032] With the above structure, when the cleaning tool is inserted into the groove 51, the positioning guide groove 32 and the guide rail (e.g., flange structure) on the profile 5 form a snap-fit ​​engagement. This engagement restricts the displacement of the cleaning head 3 in the direction perpendicular to the length of the groove, preventing the tool from moving up and down and ensuring that the scraping surface 31 always remains in close contact with the inner wall of the groove 51. At the same time, the gas from the external air source is transmitted to the air jet nozzle 33 through the first airflow channel 11 and the second airflow channel 21, realizing the simultaneous execution of mechanical scraping and airflow purging.

[0033] Furthermore, such as Figure 2 and Figure 3 As shown, the air jet nozzle 33 is located on the side wall of the cleaning head 3, and the jet direction of the air jet nozzle 33 is inclined toward the side where the scraping surface 31 is located.

[0034] With this tilted setting, the airflow ejected from the airflow nozzle 33 can be directed directly to the bottom of the groove 51 (i.e., the dead corner area) of the profile 5 to be cleaned. This allows the high-speed airflow to penetrate deep into the micro-crevices that are difficult for mechanical scrapers to reach completely, quickly blowing away the dirt that has just been loosened and preventing it from re-accumulating at the bottom of the groove.

[0035] Furthermore, the second airflow channel 21 is provided with a cross-sectional contraction section (not shown, located inside) near the airflow nozzle 33, and the inner diameter of the cross-sectional contraction section is smaller than the inner diameter of the rest of the second airflow channel 21.

[0036] By utilizing the design of the cross-sectional contraction section and applying fluid dynamics principles, the airflow velocity increases dramatically when passing through the narrow cross-section. The high-speed jet of air has stronger kinetic energy, effectively breaking down and peeling away damp, hardened dirt, significantly improving cleaning power.

[0037] like Figure 2 As shown, the positioning guide groove 32 is a semi-circular or arc-shaped groove extending along the width direction of the cleaning head 3.

[0038] The semi-circular or arc-shaped groove can perfectly fit with the cylindrical or arc-shaped guide rails commonly found on profile 5, increasing the contact area and making the tool slide more smoothly along the length of the groove, reducing shaking and wear.

[0039] like Figure 1 and Figure 2As shown, this embodiment also includes a dustproof plate 34, which is disposed above the cleaning head 3, and the coverage width of the dustproof plate 34 is greater than the width of the cleaning head 3 and the opening width of the groove 51 of the profile 5 to be cleaned.

[0040] The dustproof plate 34 forms a physical barrier that can effectively intercept dust and splashing particles raised by the high-pressure airflow, preventing them from directly hitting the operators and improving the working environment.

[0041] Furthermore, the dustproof plate 34 is secured by fasteners (such as...) Figure 2 The screw shown is rotatably connected to the front end of the cleaning head 3 or the connecting rod 2, so that the angle of the dust cover 34 relative to the cleaning head 3 is adjustable.

[0042] This allows operators to flexibly adjust the angle of the dust cover 34 according to the height of the handle grip or the depth of the groove, ensuring that the dust cover 34 can tightly cover the groove opening in various operating postures.

[0043] like Figure 2 As shown, the dustproof plate 34 is an arc-shaped plate with its concave surface facing the cleaning head 3, so as to form an airflow guide cavity 6 between the dustproof plate 34 and the profile 5 to be cleaned.

[0044] The concave arc surface can guide the rebounding airflow and dust downwards or longitudinally along the groove, forming a directional slag discharge path and preventing dust from spreading disorderly in all directions.

[0045] like Figure 1 As shown, the axis of the connecting rod 2 has an angle (e.g., 30 degrees) with the axis of the handle assembly 1; the outer contour of the handle assembly 1 has a drum-shaped structure that tapers at both ends and protrudes in the middle.

[0046] The angled design places the handle above the grooved plane, providing space for the operator's hands to avoid scratches; the drum-shaped handle makes it easier to apply force.

[0047] like Figure 1 As shown, the cleaning head 3 and the connecting rod 2 are integrally formed; the tail end of the handle assembly 1 is provided with an air pipe connector for connecting to an external air source, and the air pipe connector is coaxially connected to the first airflow channel 11.

[0048] The one-piece molded structure ensures that the tool will not break during high-intensity scraping operations; the coaxial air intake design makes the air tube follow well and the operation flexible.

[0049] Specifically, in this embodiment, in order to further clarify the technical details of the present invention and its working principle under actual working conditions, combined with Figures 1 to 3 The specific structure and coordination logic of each component are described in detail.

[0050] This embodiment is mainly applied to the cleaning of the grooves of the H-frame hinge profiles of rail transit vehicles (such as maglev trains). The profile 5 to be cleaned has a complex cross-section, including a groove 51 with an upper opening (approximately 32 mm wide) and a raised guide rail (e.g., a cylindrical protrusion with a diameter of 4 mm) located at the edge of the groove.

[0051] The cleaning head 3 and the connecting rod 2 are preferably integrally injection molded or cast from engineering plastics (such as nylon PA66) or soft metals (such as copper alloys) with a hardness slightly lower than aluminum alloy but with extremely high wear resistance. This integrated structure eliminates the connection step, allowing it to smoothly enter narrow grooves with only about 5.15mm of gap.

[0052] The front end of the cleaning head 3 is designed as a hook, and the radius of curvature of its outer scraping surface 31 is designed to be R10mm to precisely fit the R10mm rounded corner at the bottom of the profile groove. The positioning guide groove 32 is designed as a semi-circular groove with a radius of R2mm, forming a clearance fit with the R2mm raised guide rail on the profile (for example, the clearance is controlled at 0.1-0.3mm).

[0053] It is worth noting that the positioning guide groove 32 and the scraping surface 31 are spatially opposite to each other. When the operator pushes the tool forward to scrape, the stubborn dirt on the inner wall of the groove generates backward cutting resistance on the scraping surface 31. Since the positioning guide groove 32 is engaged with the rigid guide rail of the profile, this resistance generates a torque, causing the inner wall of the positioning guide groove 32 to press more tightly against the side of the profile guide rail. This "self-locking effect" achieved by utilizing cutting reaction force eliminates the risk of "tool skipping" or derailment that traditional tools are prone to when encountering hard dirt, ensuring the stability of the scraping process.

[0054] In terms of airflow design, the main diameter of the second airflow channel 21 is 2mm, but as it extends into the cleaning head 3 and approaches the airflow nozzle 33, the diameter of the airflow channel narrows to 1.6mm. This narrowing structure converts the pressure energy of the gas into kinetic energy, resulting in a significant increase in the airflow velocity at the nozzle.

[0055] The airflow nozzle 33 is not simply formed on the surface, but is set in a miniature countersunk hole in the sidewall of the scraping surface 31. The axis of the nozzle 33 is inclined downward at an angle of about 4 degrees to the horizontal plane, precisely pointing to the deepest part of the groove 51.

[0056] Because the nozzle is located close to the scraping contact line and at a specific angle, the high-speed airflow can penetrate the tiny gap between the dirt and the bottom of the groove the instant the scraper peels off the dirt. The airflow forms an "air wedge" here, generating an upward peeling force. This makes the cleaning process no longer a simple "scrape then blow" but "pneumatically assisted peeling," effectively removing sticky residues that have seeped into the micropores of the profile. At the same time, the countersunk design prevents scraped-off dirt from being directly squeezed into the nozzle and causing blockage.

[0057] The dust cover 34 is made of transparent polycarbonate (PC) material and is designed as a large-curvature arc sheet with an R40mm radius and a width of 50mm, which can completely cover the profile opening. The dust cover 34 is connected to the connection between the cleaning head 3 and the connecting rod 2 by an M3 screw, and is equipped with elongated holes or damping washers, so that the dust cover 34 has the ability to be adjusted to adapt to different handle grip heights of the operator (such as changes in standing or squatting posture).

[0058] More importantly, the concave arc surface of the dustproof plate 34, the upper surface of the cleaning head 3, and the opening of the profile groove spatially form an expanding airflow guiding cavity 6. That is, the cross-sectional area of ​​the cavity gradually increases from the airflow nozzle 33 to the edge of the dustproof plate 34. When a high-speed airflow carrying dirt reflects up from the bottom of the groove and enters the cavity, the airflow speed decreases rapidly due to the sudden expansion of the space (diffusion deceleration). The decrease in speed causes large particles of mud, sand, and stones to lose kinetic energy and fall back or slide down the profile surface under the action of gravity, instead of being scattered and flying with the airflow. Therefore, this dustproof plate is essentially a "gas-solid separation device" designed based on aerodynamic principles.

[0059] The length of the connecting rod 2 is set to 90mm, and the angle between it and the axis of the handle assembly 1 is set to 30 degrees to conform to ergonomics. The front end of the handle assembly 1 has a rectangular slot, and the rear end of the connecting rod 2 is machined into a square structure to match it. The two are connected by an interference fit.

[0060] This long, deep, non-circular interlocking structure ensures rigid torque transmission. When cleaning long trenches, operators often need to apply rotational torque to adjust the pressure of the scraper on the trench sidewalls. This structure ensures that even the slightest rotation of the operator's wrist is 100% accurately transmitted to the cleaning head 3, enabling a "scraping" operation on the trench sidewalls and providing control precision beyond that of ordinary threaded connection tools.

[0061] In summary, the tool in this embodiment achieves precise positioning under blind operation, efficient pneumatic-assisted stripping, and dust-free environmentally friendly operation through the synergistic effect of the above structural details.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. All equivalent changes and modifications made within the scope defined by the claims of the present invention should still fall within the protection scope of the present invention.

Claims

1. A cleaning tool for profile grooves, characterized in that, include: The handle assembly (1) has a through first airflow channel (11) arranged axially inside; A connecting rod (2) is fixedly connected to the handle assembly (1) at its rear end. The connecting rod (2) has a hollow interior forming a second airflow channel (21) that communicates with the first airflow channel (11). The cleaning head (3) is fixedly connected to the front end of the connecting rod (2); The front end face of the cleaning head (3) is formed with a scraping curved surface (31) that matches the inner wall contour of the groove (51) of the profile (5) to be cleaned. The cleaning head (3) has a positioning guide groove (32) recessed on the side away from the scraping curved surface (31). The positioning guide groove (32) is used to match the shape of the guide rail on the profile (5) to be cleaned. The second airflow channel (21) extends into the interior of the cleaning head (3) and connects to the airflow nozzle (33) provided on the cleaning head (3).

2. The cleaning tool for profile grooves as described in claim 1, characterized in that, The air jet nozzle (33) is located on the side wall of the cleaning head (3), and the jet direction of the air jet nozzle (33) is inclined toward the side where the scraping surface (31) is located, so that the air jet from the air jet nozzle (33) can be directed toward the bottom of the groove (51) of the profile (5) to be cleaned.

3. The cleaning tool for profile grooves as described in claim 2, characterized in that, The second airflow channel (21) has a cross-sectional contraction section near the airflow nozzle (33), and the inner diameter of the cross-sectional contraction section is smaller than the inner diameter of the rest of the second airflow channel (21).

4. The cleaning tool for profile grooves as described in claim 1, characterized in that, The positioning guide groove (32) is a semi-circular or arc-shaped groove extending along the width direction of the cleaning head (3).

5. The cleaning tool for profile grooves as described in claim 1, characterized in that, It also includes a dustproof plate (34), which is disposed above the cleaning head (3), and the coverage width of the dustproof plate (34) is greater than the width of the cleaning head (3) and the opening width of the groove (51) of the profile (5) to be cleaned.

6. The cleaning tool for profile grooves as described in claim 5, characterized in that, The dustproof plate (34) is rotatably connected to the front end of the cleaning head (3) or the connecting rod (2) by fasteners, so that the angle of the dustproof plate (34) relative to the cleaning head (3) is adjustable.

7. The cleaning tool for profile grooves as described in claim 5, characterized in that, The dustproof plate (34) is an arc-shaped plate with its concave surface facing the cleaning head (3) to form an airflow guide cavity (6) between the dustproof plate (34) and the profile (5) to be cleaned.

8. The cleaning tool for profile grooves as described in claim 1, characterized in that, The axis of the connecting rod (2) has an angle with the axis of the handle assembly (1); the outer contour of the handle assembly (1) is a drum-shaped structure with both ends tapering and the middle protruding.

9. The cleaning tool for profile grooves as described in claim 1, characterized in that, The cleaning head (3) and the connecting rod (2) are integrally formed; the tail end of the handle assembly (1) is provided with an air pipe connector for connecting to an external air source, and the air pipe connector is coaxially connected to the first airflow channel (11).

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