Railway wagon brake cylinder front and rear brake lever misloading prevention mark inspection device and inspection method

Abstract

The invention discloses a railway wagon brake cylinder front and rear brake lever anti-misloading mark inspection device and inspection method, belongs to the technical field of inspection and detection, and aims to solve the problems of visual fatigue, operation omission and low detection efficiency caused by similar structures of brake levers and easy upside-down marks when a tape measure is adopted to measure a mark coating position. The front brake lever inspection device comprises a first fixing part, a first positioning part and a second positioning part, wherein the lengths of the first positioning part and the second positioning part are different along the fixing direction; the rear brake lever inspection device comprises a second fixing piece, a third positioning piece and a fourth positioning piece, according to the checking method, the fixing piece is inserted into the lever fulcrum, and whether the accessory is qualified is judged according to coincidence or pointing relation of the positioning piece and the mark. The device is simple in structure, low in manufacturing cost, adaptive to a narrow space of a lever fulcrum, accurate in detection and high in efficiency, reduces the labor intensity of inspection personnel, effectively avoids mistaken installation of the brake lever, and guarantees the running safety of a railway wagon.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of inspection and detection, and particularly relates to a railway freight car brake cylinder front and rear brake lever anti-misinstallation mark inspection device and a checking method. BACKGROUND

[0002] The brake cylinder front brake lever and the rear brake lever are key parts of a railway freight car brake system and a bogie, and are usually made of cast steel. Since the brake cylinder front brake lever and the rear brake lever are highly similar in shape, end structure and overall length, misinstallation is prone to occur in the actual assembly process, which poses a hidden danger to the running safety of the railway freight car.

[0003] To solve this problem, relevant technical personnel proposes that an anti-misinstallation mark needs to be painted in advance before the brake cylinder front and rear brake levers are installed; meanwhile, at the stage of delivery of the railway freight car, an automatic identification of the anti-misinstallation mark on the lever is performed by a detection system, so as to ensure the correctness of installation of the front and rear brake levers. When the system identifies that the anti-misinstallation mark is wrong, a prompt is immediately sent and the vehicle delivery process is paused, so as to avoid equipment failure of the railway freight car due to misinstallation of the brake lever in subsequent operation.

[0004] To respond to the above technical solution, an inspector needs to confirm the compliance of the painted anti-misinstallation mark before the brake cylinder front and rear brake levers are installed, so as to prevent subsequent rework due to error in painting of the mark. However, the existing inspection and detection technology mainly relies on a tape measure to measure the position of the mark, is limited by the highly similar structural features of the front and rear brake levers, and there is a possibility that the words are reversed in the process of painting the mark. Visual fatigue is prone to occur in the inspector in a long time operation, which not only has the risk of operation omission, but also leads to low checking efficiency, and it is difficult to meet the quality control requirements of the railway freight car production. SUMMARY

[0005] The application aims to at least solve the technical problems that the inspector is prone to visual fatigue, has the risk of operation omission, has low checking efficiency, and is difficult to meet the quality requirements. To this end, the application provides a railway freight car brake cylinder front and rear brake lever anti-misinstallation mark inspection device and a checking method.

[0006] In a first aspect, the application provides a railway freight car brake cylinder front brake lever anti-misinstallation mark inspection device, which comprises a first fixing member, a first positioning member and a second positioning member; the first positioning member and the second positioning member are fixedly connected on opposite sides of the first fixing member; the length of the first positioning member and the length of the second positioning member are different in a first direction; the first direction is the fixing direction of the first positioning member or the second fixing member and the first fixing member.

[0007] Therefore, the size adaptability of the first fixing member and the front brake lever fulcrum allows the device to be smoothly placed in the narrow space of the lever fulcrum, meeting the space limitation requirements of railway freight car accessory detection; the length difference design of the first positioning member and the second positioning member in the first direction accurately matches the different position marks on the front brake lever, realizing the rapid alignment of the mark position. Compared with the traditional measuring method by tape measure, this structure avoids the repeated measurement and reading operation of the tester, reduces the risk of operation omission caused by visual fatigue; at the same time, the firm connection of the positioning member and the fixing member ensures the stability of the device during detection, and avoids the detection deviation caused by loose structure, effectively improves the detection accuracy of the front brake lever anti-misinstallation mark coating condition, improves the detection efficiency, and stably meets the anti-misinstallation quality requirements of railway freight car brake accessories.

[0008] In a possible implementation, the first fixing member is a circular ring. Therefore, the first fixing member with a circular ring structure forms a matching surface contact with the circular inner wall of the front brake lever fulcrum, improving the stability and convenience of the device during detection, and reducing the fatigue of the worker during long-time detection operation; the smooth rotation characteristics of the circular ring structure further improve the efficiency of mark detection, especially when checking whether the mark is upside down, the angle of the positioning member can be quickly adjusted to accurately align the position of the mark, effectively avoiding detection omission caused by poor rotation of the device.

[0009] In a possible implementation, the first positioning member and the second positioning member are both bending members; the first positioning member includes a first segment and a second segment, the first segment being perpendicular to the second segment; the second positioning member includes a third segment and a fourth segment, the third segment being perpendicular to the fourth segment. Therefore, the segmented structure of the bending allows the first segment and the third segment to be responsible for horizontal mark size detection, and the second segment and the fourth segment to be responsible for vertical mark size detection, realizing the synchronous detection of the horizontal and vertical positioning sizes of the mark, without the need for testers to measure separately, greatly simplifying the detection steps.

[0010] In a possible implementation, along the first direction, the first segment is parallel to the third segment; along a second direction, the lengths of the second segment and the fourth segment are different, and the second direction is perpendicular to the first direction. Therefore, the free ends of the second segment and the fourth segment can be aligned with the boundaries of the mark, and if the mark is upside down, the free ends of the second segment and the fourth segment will be obviously misaligned with the vertical boundaries of the mark, and the tester can directly judge whether the mark coating is wrong through visual observation; the unequal lengths of the second segment and the fourth segment are beneficial to prevent the front brake lever anti-misinstallation mark detection device from being unable to distinguish the direction during use.

[0011] In a possible implementation, the first positioning member is provided with a positioning mark. Thus, the front brake lever anti-misinstallation mark inspection device can be prevented from being unable to distinguish the direction when in use.

[0012] In a possible implementation, the first fixing member, the first positioning member and the second positioning member are integrally formed. Thus, the integral forming of the structure cooperation greatly improves the overall strength of the device, solves the problems of welding deformation and loose connection of the welded structure, prolongs the service life of the device and reduces the maintenance cost in the later period. The relative position error of the positioning member and the fixing member is small, which further improves the accuracy of the mark detection and better meets the quality requirements of the railway freight car brake accessory anti-misinstallation. The surface of the device after forming is smoother, the friction with the brake lever fulcrum during insertion and rotation is smaller, the operation is smoother, and the operation resistance of the inspector is reduced.

[0013] In a possible implementation, the material of the first fixing member, the first positioning member and the second positioning member includes any one of stainless steel, plastic and steel. Thus, the device with the steel material is suitable for high-strength and high-frequency detection scenarios by virtue of the high-rigidity structure cooperation, has a long service life and can effectively reduce the replacement cost of the device; the device with the stainless steel material is adapted to the humid environment by the corrosion-resistant characteristics and ensures the dimensional accuracy in long-term use; the device with the plastic material greatly reduces the labor intensity of the inspector by virtue of the lightweight structure cooperation, and the toughness feature can protect the surface of the brake lever from being damaged, and the detection efficiency and the accessory protection are considered. The selection of the three materials makes the device adaptable to different use environments and detection requirements, and improves the universality and practicality of the device.

[0014] In a second aspect, the embodiments of the present application provide a railway freight car brake cylinder rear brake lever anti-misinstallation mark inspection device, which comprises a second fixing member, a third positioning member and a fourth positioning member. The third positioning member and the fourth positioning member are fixedly connected on opposite sides of the second fixing member, and the length of the third positioning member and the length of the fourth positioning member are the same in a first direction. The first direction is the fixing direction of the third positioning member or the fourth fixing member and the second fixing member.

[0015] Therefore, the size adaptability of the second fixing member and the rear brake lever fulcrum allows the device to be smoothly put into the narrow space of the lever fulcrum, meeting the space limitation requirements of railway freight car accessory detection; the third positioning member and the fourth positioning member accurately match different position marks on the rear brake lever, achieving rapid alignment of the mark position. Compared with the traditional measuring method by tape measure, the structure cooperation avoids the repeated measurement and reading operation of the inspector, reduces the risk of operation omission caused by visual fatigue; at the same time, the firm connection of the positioning member and the fixing member ensures the stability of the device during detection, and avoids detection result deviation caused by structure loosening, effectively improves the detection accuracy of the anti-misinstallation mark coating of the rear brake lever, improves the detection efficiency, and stably meets the anti-misinstallation quality requirements of railway freight car brake accessories.

[0016] In a possible implementation, the second fixing member is a circular ring. Therefore, the second fixing member with a circular ring structure forms a matching surface contact with the circular inner wall of the rear brake lever fulcrum, improving the stability and convenience of the device during detection, and reducing the fatigue of the worker during long-time detection operation; the smooth rotation characteristics of the circular ring structure further improve the efficiency of mark detection, especially when checking whether the mark is upside down, the angle of the positioning member can be quickly adjusted to accurately align the position of the mark, effectively avoiding detection omission caused by poor rotation of the device.

[0017] In a possible implementation, the third positioning member and the fourth fixing member are both rib plates. Therefore, the equal length design of the rib plate allows the device to have no direction limitation in detection, simplifies the operation process, reduces the operation steps of the inspector, improves the detection efficiency, and reduces the risk of detection deviation caused by wrong direction judgment.

[0018] In a possible implementation, the second fixing member, the third positioning member and the fourth positioning member are an integrally formed structure. Therefore, the integrally formed structure cooperation greatly improves the overall strength of the device, solves the problems of welding deformation and loose connection of the welded structure, prolongs the service life of the device, and reduces the later maintenance cost. The relative position error between the positioning member and the fixing member is small, which further improves the accuracy of mark detection and better meets the anti-misinstallation quality requirements of railway freight car brake accessories. The surface of the formed device is smoother, the friction with the brake lever fulcrum is smaller during insertion and rotation, the operation is smoother, and the operation resistance of the inspector is reduced.

[0019] In one possible implementation, the second fixing member, the third positioning member, and the fourth positioning member are made of any one of stainless steel, plastic, and steel. Thus, the steel device, with its high-rigidity structure, is suitable for high-intensity, high-frequency testing scenarios, has a long service life, and effectively reduces device replacement costs; the stainless steel device, with its corrosion-resistant properties, is suitable for humid environments, ensuring dimensional accuracy during long-term use; and the plastic device, with its lightweight structure, significantly reduces the labor intensity of inspection personnel, and its toughness protects the brake lever surface from damage, balancing testing efficiency and component protection. The choice of these three materials allows the device to adapt to different operating environments and testing needs, improving its versatility and practicality.

[0020] Thirdly, embodiments of this application provide a method for inspecting the marking of the anti-misinstallation mark on the front brake lever of a railway freight car brake cylinder, using the front brake lever anti-misinstallation mark inspection device described in any of the above claims, including the following steps: S1. Fixing the first fixing member within the lever fulcrum of the first part to be inspected; S2. Determining whether the first positioning member and the second positioning member coincide with the first marking mark and the second marking mark of the first part to be inspected; if yes, then the first part to be inspected is not the front brake lever, or the first marking mark and the second marking mark are incorrectly marked; if no, then the first part to be inspected is the front brake lever.

[0021] Therefore, this method simplifies the operation for inspectors, significantly improves testing efficiency and accuracy, and better meets the quality requirements for preventing misinstallation of railway freight car brake components.

[0022] In one possible implementation, the first fixing member is a ring, and the outer diameter of the first fixing member is less than or equal to the inner diameter of the lever fulcrum of the first item to be inspected. This ensures that the ring can easily fit onto the lever fulcrum without excessive wobbling.

[0023] Fourthly, this application provides a method for inspecting the marking of the anti-misinstallation mark on the rear brake lever of a railway freight car brake cylinder, using the rear brake lever anti-misinstallation mark inspection device described in any of the above claims, including the following steps: S1. Fixing the second fixing member within the lever fulcrum of the second part to be inspected; S2. Determining whether the third positioning member and the fourth positioning member point to the third and fourth marking marks on the second part to be inspected; if yes, then the second part to be inspected is the rear brake lever; if no, then the second part to be inspected is not the rear brake lever, or the third and fourth marking marks are incorrectly marked.

[0024] Therefore, this method simplifies the operation for inspectors, significantly improves testing efficiency and accuracy, and better meets the quality requirements for preventing misinstallation of railway freight car brake components.

[0025] In one possible implementation, the second fixing member is a ring, and the outer diameter of the second fixing member is less than or equal to the inner diameter of the lever fulcrum of the second item to be inspected. This ensures that the ring can easily fit onto the lever fulcrum without excessive wobbling. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a railway freight car brake cylinder front brake lever anti-misinstallation marking inspection device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a railway freight car brake cylinder rear brake lever anti-misinstallation marking inspection device provided in an embodiment of this application; Figure 3 This is a schematic diagram illustrating the correct marking of the front brake lever of a railway freight car brake cylinder to prevent misinstallation, provided in an embodiment of this application. Figure 4 This is a schematic diagram illustrating the incorrect marking of the front brake lever of a railway freight car brake cylinder, as provided in an embodiment of this application. Figure 5 This is a schematic diagram showing the correct marking of the rear brake lever of a railway freight car brake cylinder to prevent misinstallation, provided in an embodiment of this application.

[0028] Figure label: Front brake lever anti-misinstallation marking inspection device-10; First fixing component-110; First positioning component-120; First section-121; Second section-122; Third positioning component-130; Third section-131; Fourth section-132; Rear brake lever anti-misinstallation marking inspection device-20; Second fixing component-210; Third positioning component-220; Fourth positioning component-230; First component to be inspected-30; Lever fulcrum of the first component to be inspected-310; First marking-320; Second marking-330; Second component to be inspected-40; Lever fulcrum of the second component to be inspected-410; Third marking-420; Fourth marking-430. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of this invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their 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. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] In related technologies, measuring tapes are often used to measure the marking positions. However, because the shapes, ends, and lengths of the front and rear brake levers are extremely similar, and because the markings may be reversed, inspectors are prone to visual fatigue, operational oversights, low inspection efficiency, and difficulty in meeting quality requirements. This application provides a device and method for inspecting the marking positions of the front and rear brake levers of railway freight car brake cylinders to prevent mis-installation. This method can safely and reliably inspect whether the marking positions are correct, has high inspection efficiency, and can meet the quality requirements for preventing mis-installation of key components of railway freight car braking systems and bogies.

[0032] This application is described below with reference to the accompanying drawings and specific embodiments: Please see Figure 1 , Figure 1This is a schematic diagram of a railway freight car brake cylinder front brake lever anti-misinstallation marking inspection device provided in an embodiment of this application. This embodiment of the application provides a railway freight car brake cylinder front brake lever anti-misinstallation marking inspection device 10, including a first fixing member 110, a first positioning member 120, and a second positioning member 130; the first positioning member 120 and the second positioning member 130 are fixedly connected to opposite sides of the first fixing member 110; along a first direction X, the length of the first positioning member 120 and the length of the second positioning member 130 are different; the first direction X is the fixing direction of the first positioning member 120 or the second fixing member 130 and the first fixing member 110.

[0033] The first fixing member 110 is used to fix the part to be inspected, for example, the first fixing member 110 is fixed in the lever fulcrum of the part to be inspected. The first positioning member 120 and the second positioning member 130 are used to detect whether the mark on the part to be inspected is in the correct position and to determine whether the part to be inspected is a front brake lever.

[0034] It is understandable that the first fixing member 110 can be of various shapes, such as triangle, square or circle, to ensure that the first fixing member 110 can be smoothly inserted into the narrow space of the lever fulcrum, and has a certain rotational margin after insertion.

[0035] In some possible embodiments, the first positioning member 120 and the second positioning member 130 are made of steel plate and are fixed to the radially opposite sides of the first fixing member 110 by welding process. The fixing direction of the two and the first fixing member 110 is the first direction X.

[0036] When using this device, the first fixing member 110 is inserted into the lever fulcrum of the front brake lever. By utilizing the length difference between the first positioning member 120 and the second positioning member 130 in the first direction X, different marking positions on the front brake lever can be directly matched. There is no need for inspectors to use a tape measure to measure. Simply align the positioning member with the boundary of the marking to quickly determine whether the marking position is accurate.

[0037] Therefore, on the one hand, the size compatibility between the first fixing component 110 and the fulcrum of the front brake lever allows the device to be smoothly placed into the narrow space of the lever fulcrum, meeting the space constraints for railway freight car parts inspection; on the other hand, the differentiated length design of the first positioning component 120 and the second positioning component 130 in the first direction X precisely matches the different position marks on the front brake lever, achieving rapid alignment of the mark positions. Compared with the traditional tape measure method, this structure avoids the repeated measurement and reading operations of inspectors, reducing the risk of operational oversights caused by visual fatigue; at the same time, the firm connection between the positioning component and the fixing component ensures the stability of the device during the inspection process, preventing deviations in inspection results due to structural loosening, effectively improving the inspection accuracy of the front brake lever anti-misinstallation marking, increasing inspection efficiency, and consistently meeting the anti-misinstallation quality requirements for railway freight car brake parts.

[0038] Please see Figure 1 In this embodiment, the first fixing member 110 is a ring.

[0039] Indicatively, the first fixing component 110 adopts a ring structure. The inner diameter of the ring is designed according to the internal hollow structure of the front brake lever fulcrum, and the outer diameter is strictly controlled to be less than or equal to the inner diameter of the front brake lever fulcrum. The specific dimensions are adapted to the specifications of the fulcrum's inner diameter, ensuring that the ring can easily fit into the lever fulcrum without excessive wobbling. The ring can be forged from carbon steel, ensuring structural strength while also considering the device's lightweight design, making it easy for inspectors to handle. The first positioning component 120 and the second positioning component 130 are respectively welded to opposite sides of the outer circumference of the ring, with the welding positions centrally symmetrical with respect to the ring's center. During actual testing, the ring-shaped first fixing component 110 is fitted into the lever fulcrum of the front brake lever. The ring's circumferential structure forms surface contact with the circular inner wall of the fulcrum, ensuring smooth rotation of the device within the fulcrum without any jamming.

[0040] Thus, on the one hand, the first fixing member 110 of the ring structure forms a suitable surface contact with the inner wall of the circular brake lever fulcrum, which improves the stability and convenience of the device during the detection process and reduces the fatigue of the staff during long-term detection operations; on the other hand, the smooth rotation characteristics of the ring structure further improve the efficiency of mark detection, especially when checking whether the marks are upside down or painted backwards, the angle of the positioning member can be quickly adjusted to accurately align the position of the mark, effectively avoiding detection omissions caused by the device's poor rotation.

[0041] Please see Figure 1In this embodiment of the application, both the first positioning member 120 and the second positioning member 130 are bent members; the first positioning member 120 includes a first segment 121 and a second segment 122, with the first segment 121 perpendicular to the second segment 122; the second positioning member 130 includes a third segment 131 and a fourth segment 132, with the third segment 131 perpendicular to the fourth segment 132.

[0042] Specifically, both the first positioning component 120 and the second positioning component 130 are bent components manufactured using a bending process. Stainless steel plates can be used as raw materials for bending to ensure the accuracy of the bending angle. The first positioning component 120 consists of a first segment 121 and a second segment 122, with a bending angle of 90° between the first and second segments. The first segment 121 extends along the first direction X, and one end is welded to the first fixing component 110. The second segment 122 is perpendicular to the first segment 121 and extends along the second direction Y. Its free end can be ground into a rounded corner to avoid scratching the cast steel surface of the front brake lever. Similarly, the second positioning component 130 adopts the same configuration as the first positioning component 120. When detecting a mark, the free ends of the second segment 122 and the fourth segment 132 can accurately abut against the boundary of the mark to achieve mark detection.

[0043] Thus, the segmented structure with bending allows the first segment 121 and the third segment 131 to be responsible for the detection of the horizontal marking size, while the second segment 122 and the fourth segment 132 are responsible for the detection of the vertical marking size. This enables the simultaneous detection of the positioning dimensions of the marking in both the horizontal and vertical dimensions, eliminating the need for inspectors to measure them separately and greatly simplifying the inspection process.

[0044] Please see Figure 1 In this embodiment of the application, along the first direction X, the first segment 121 is parallel to the third segment 131; along the second direction Y, the second segment 122 and the fourth segment 132 have different lengths, and the second direction Y is perpendicular to the first direction X.

[0045] Schematic, along the first direction X, the first segment 121 of the first positioning member 120 and the third segment 131 of the second positioning member 130 remain parallel, and the extension trajectories of the two segments in the first direction X are consistent. Along the second direction Y, the length of the second segment 122 of the first positioning member 120 is different from the length of the fourth segment 132 of the second positioning member 130. Both the second segment 122 and the fourth segment 132 are perpendicular to the first direction X, which can prevent the front brake lever anti-misinstallation marking inspection and detection device from being unable to distinguish the direction when in use.

[0046] It is understandable that the length of the second segment 122 of the first positioning member 120 and the length of the fourth segment 132 of the second positioning member 130 can also be the same.

[0047] Therefore, on the one hand, the free ends of the second segment 122 and the fourth segment 132 can be aligned with the boundary of the mark. If the mark is painted upside down, the free ends of the second segment 122 and the fourth segment 132 will be significantly misaligned with the longitudinal boundary of the mark. Inspectors can directly judge whether the mark is painted incorrectly by visual observation. On the other hand, the unequal lengths of the second segment 122 and the fourth segment 132 help prevent the front brake lever anti-misinstallation mark inspection device 10 from being unable to distinguish the direction when in use.

[0048] Please see Figure 1 In this embodiment, the first positioning member 120 is provided with a positioning mark. For example, the outer side of the first segment 121 is painted white.

[0049] This helps prevent the front brake lever misinstallation marking inspection device 10 from being unable to distinguish the direction during use.

[0050] Please see Figure 1 In this embodiment, the first fixing member 110, the first positioning member 120, and the second positioning member 130 are integrally formed structures.

[0051] Indicatively, the first fixing component 110, the first positioning component 120, and the second positioning component 130 are manufactured using a one-piece cast steel molding process. Cast steel materials conforming to railway freight car parts standards are selected and cast using a mold. After molding, the surface of the device is ground and polished to remove burrs and flash generated during casting, ensuring the free ends of the first positioning component 120 and the second positioning component 130 are smooth and flat, preventing scratches on the brake lever surface.

[0052] Therefore, on the one hand, the integrated molding structure significantly improves the overall strength of the device, solving problems such as welding deformation and loose connections that are prone to occur in welded structures, extending the service life of the device, and reducing later maintenance costs. On the other hand, the small relative positional error between the positioning and fixing parts further improves the accuracy of marking and inspection, better meeting the quality requirements for preventing misinstallation of railway freight car brake components. Furthermore, the smoother surface of the molded device reduces friction with the brake lever fulcrum during insertion and rotation, resulting in smoother operation and reduced operational resistance for inspectors.

[0053] Please see Figure 1 In this embodiment of the application, the materials of the first fixing member 110, the first positioning member 120, and the second positioning member 130 include any one of stainless steel, plastic, and steel.

[0054] Therefore, on the one hand, steel devices, with their high-rigidity structure, are suitable for high-intensity, high-frequency testing scenarios, have a long service life, and effectively reduce device replacement costs. On the other hand, stainless steel devices, with their corrosion-resistant properties, are well-suited for humid environments, ensuring dimensional accuracy during long-term use. Furthermore, plastic devices, with their lightweight structure, significantly reduce the labor intensity of inspection personnel, and their toughness protects the brake lever surface from damage, balancing testing efficiency and component protection. The choice of these three materials allows the device to adapt to different operating environments and testing needs, enhancing its versatility and practicality.

[0055] Please see Figure 2 , Figure 2 This is a schematic diagram of a railway freight car brake cylinder rear brake lever anti-misinstallation marking inspection device provided in an embodiment of this application. This embodiment of the application provides a railway freight car brake cylinder rear brake lever anti-misinstallation marking inspection device 20, including a second fixing member 210, a third positioning member 220, and a fourth positioning member 230; the third positioning member 220 and the fourth positioning member 230 are fixedly connected to opposite sides of the second fixing member 210, and along a first direction X, the length of the third positioning member 220 and the length of the fourth positioning member 230 are the same; the first direction X is the fixing direction of the third positioning member 220 or the fourth fixing member 230 and the second fixing member 210.

[0056] The second fixing member 210 is used to fix the part to be inspected, for example, the second fixing member 210 is fixed in the lever fulcrum of the part to be inspected. The third positioning member 220 and the fourth positioning member 230 are used to detect whether the mark on the part to be inspected is in the correct position and to determine whether the part to be inspected is the rear brake lever.

[0057] Understandably, the second fastener 210 can be of various shapes, such as triangle, square or circle, to ensure that the second fastener 210 can be smoothly inserted into the narrow space of the lever fulcrum, and has a certain rotational margin after insertion.

[0058] In some possible embodiments, the third positioning member 220 and the fourth positioning member 230 are made of steel plate and are fixed to the radially opposite sides of the second fixing member 210 by welding process. The fixing direction of the two and the second fixing member 210 is the first direction X.

[0059] When using this device, the second fixing member 210 is inserted into the lever fulcrum of the front brake lever. The third positioning member 220 and the fourth positioning member 230 can be used to directly correspond to the marked position on the rear brake lever. There is no need for inspectors to use a measuring tape to measure. Simply align the positioning member with the boundary of the mark to quickly determine whether the mark is painted accurately.

[0060] Therefore, on the one hand, the size compatibility between the second fixing component 210 and the fulcrum of the rear brake lever allows the device to be smoothly placed into the narrow space of the lever fulcrum, meeting the space constraints for railway freight car parts inspection; on the other hand, the third positioning component 220 and the fourth positioning component 230 precisely match the different position marks on the rear brake lever, enabling rapid alignment of the mark positions. Compared with the traditional tape measure method, this structure avoids repeated measurement and reading operations by inspectors, reducing the risk of operational oversights caused by visual fatigue; at the same time, the firm connection between the positioning component and the fixing component ensures the stability of the device during the inspection process, preventing deviations in inspection results due to structural loosening, effectively improving the inspection accuracy of the rear brake lever anti-misinstallation marking, increasing inspection efficiency, and consistently meeting the anti-misinstallation quality requirements for railway freight car brake parts.

[0061] Please see Figure 2 In this embodiment, the second fixing member 210 is a ring.

[0062] Indicatively, the second fixing component 210 adopts a ring structure. The inner diameter of the ring is designed according to the hollow internal structure of the rear brake lever fulcrum, while the outer diameter is strictly controlled to be less than or equal to the inner diameter of the rear brake lever fulcrum. The specific dimensions are adapted to the specifications of the fulcrum's inner diameter, ensuring that the ring can easily fit into the lever fulcrum without excessive wobbling. The ring can be forged from carbon steel, ensuring structural strength while also considering the device's lightweight design, making it easy for inspectors to handle. The third positioning component 220 and the fourth positioning component 230 are welded to opposite sides of the outer circumference of the ring, with the welding positions symmetrically distributed with respect to the ring's center. During actual testing, the ring-shaped second fixing component 210 is fitted into the lever fulcrum of the rear brake lever. The ring's circumferential structure forms surface contact with the circular inner wall of the fulcrum, ensuring smooth rotation of the device within the fulcrum without any jamming.

[0063] Thus, on the one hand, the second fixing member 210 of the ring structure forms a suitable surface contact with the inner wall of the circular brake lever fulcrum, which improves the stability and convenience of the device during the testing process and reduces the fatigue of the staff during long-term testing operations; on the other hand, the smooth rotation characteristics of the ring structure further improve the efficiency of mark detection, especially when checking whether the marks are upside down or painted backwards, the angle of the positioning member can be quickly adjusted to accurately align the position of the mark, effectively avoiding detection omissions caused by the device's poor rotation.

[0064] Please see Figure 2 In this embodiment, both the third positioning member 220 and the fourth fixing member 230 are stiffening plates.

[0065] Indicatively, both the third positioning component 220 and the fourth positioning component 230 employ a flat rib structure. One end of the rib is welded to the second fixing component 210, while the other end can be rounded to avoid scratching the cast steel surface of the rear brake lever. When the device is inserted into the fulcrum of the rear brake lever, the free end of the rib precisely abuts against the boundary of the mark. Since the positioning dimensions of the two marks on the rear brake lever are identical, the equal-length design of the rib allows the device to still determine the accuracy of the marking by observing the fit between the free end of the rib and the mark after one rotation, without requiring inspection personnel to adjust the position or orientation of the rib.

[0066] Therefore, the equal-length design of the stiffeners enables the device to have detection capabilities without directional limitations, simplifies the operation process, reduces the number of steps for inspectors, improves detection efficiency, and reduces the risk of detection deviations caused by incorrect directional judgment.

[0067] Please see Figure 2 In this embodiment, the second fixing member 210, the third positioning member 220, and the fourth positioning member 230 are integrally formed structures.

[0068] Indicatively, the second fixing component 210, the third positioning component 220, and the fourth positioning component 230 are manufactured using a one-piece cast steel molding process. Cast steel materials conforming to railway freight car parts standards are selected and cast using a mold. After molding, the surface of the device is ground and polished to remove burrs and flash generated during casting, ensuring the free ends of the third positioning component 220 and the fourth positioning component 230 are smooth and flat, preventing scratches on the brake lever surface.

[0069] Therefore, on the one hand, the integrated molding structure significantly improves the overall strength of the device, solving problems such as welding deformation and loose connections that are prone to occur in welded structures, extending the service life of the device, and reducing later maintenance costs. On the other hand, the small relative positional error between the positioning and fixing parts further improves the accuracy of marking and inspection, better meeting the quality requirements for preventing misinstallation of railway freight car brake components. Furthermore, the smoother surface of the molded device reduces friction with the brake lever fulcrum during insertion and rotation, resulting in smoother operation and reduced operational resistance for inspectors.

[0070] Please see Figure 2 In this embodiment, the materials of the second fixing member 210, the third positioning member 220, and the fourth positioning member 230 include any one of stainless steel, plastic, and steel.

[0071] Therefore, on the one hand, steel devices, with their high-rigidity structure, are suitable for high-intensity, high-frequency testing scenarios, have a long service life, and effectively reduce device replacement costs. On the other hand, stainless steel devices, with their corrosion-resistant properties, are well-suited for humid environments, ensuring dimensional accuracy during long-term use. Furthermore, plastic devices, with their lightweight structure, significantly reduce the labor intensity of inspection personnel, and their toughness protects the brake lever surface from damage, balancing testing efficiency and component protection. The choice of these three materials allows the device to adapt to different operating environments and testing needs, enhancing its versatility and practicality.

[0072] Please see Figure 3 and Figure 4 , Figure 3 This is a schematic diagram illustrating the correct application of anti-misinstallation markings on the front brake lever of a railway freight car brake cylinder, as provided in this embodiment. Figure 4 This is a schematic diagram illustrating the incorrect marking of the anti-misinstallation mark on the front brake lever of a railway freight car brake cylinder, provided in an embodiment of this application. Based on the same inventive concept, this application also provides a method for inspecting the marking of the anti-misinstallation mark on the front brake lever of a railway freight car brake cylinder, using any of the front brake lever anti-misinstallation mark inspection devices 10 described in the above embodiments, including the following steps: S1. Fix the first fixing member 110 within the lever fulcrum 310 of the first piece to be inspected 3; S2. Determine whether the first positioning member 120 and the second positioning member 130 coincide with the first marking 320 and the second marking 330 of the first inspection member 30; if yes, then the first inspection member 30 is not the front brake lever; if no, then the first inspection member 30 is the front brake lever.

[0073] Indicatively, the circular first fixing member 110 is used to implement the pre-braking lever anti-misinstallation marking inspection method. The outer diameter of the first fixing member 110 is designed to be less than or equal to the inner diameter of the lever fulcrum 310 of the first part to be inspected 30, ensuring that the ring can easily fit into the fulcrum 310 with a suitable gap. Step S1: The inspector holds the device and fits the circular first fixing member 110 into the lever fulcrum 310 of the first part to be inspected 3. Step S2: After fitting, if the device has positioning marks, position the device according to the marks, so that the second segment 122 of the first positioning member 120 and the fourth segment 132 of the second positioning member 130 correspond to the first marking mark 320 and the second marking mark 330 respectively, and then observe the overlap between the positioning member and the mark. Figure 4 If the second segment 122 and the fourth segment 132 coincide with the first marking 320 and the second marking 330, then the first item to be inspected 30 is not the front brake lever, or the first marking 320 and the second marking 330 are incorrectly marked. Figure 3If the second segment 122 and the fourth segment 132 do not coincide with the first marking 320 and the second marking 330, then the first item to be inspected 30 is the front brake lever.

[0074] Therefore, this method simplifies the operation for inspectors, significantly improves testing efficiency and accuracy, and better meets the quality requirements for preventing misinstallation of railway freight car brake components.

[0075] Please see Figure 5 , Figure 5 This application also provides a schematic diagram showing the correct application of the anti-misinstallation marking on the rear brake lever of a railway freight car brake cylinder. Based on the same inventive concept, this application also provides a method for checking the application of the anti-misinstallation marking on the rear brake lever of a railway freight car brake cylinder, using any of the rear brake lever anti-misinstallation marking inspection devices 20 described in the above embodiments, including the following steps: S1. Fix the second fastener 210 within the lever fulcrum 410 of the second piece to be inspected 40; S2. Determine whether the third positioning element 220 and the fourth positioning element 230 point to the third marking 420 and the fourth marking 430 of the second part to be inspected 40; if yes, then the second part to be inspected 40 is the rear brake lever; if no, then the second part to be inspected 40 is not the rear brake lever, or the third marking 420 and the fourth marking 430 are incorrectly marked.

[0076] Therefore, this method simplifies the operation for inspectors, significantly improves testing efficiency and accuracy, and better meets the quality requirements for preventing misinstallation of railway freight car brake components.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0078] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0079] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A marking and inspection device for preventing misinstallation of the front brake lever of a railway freight car brake cylinder, characterized in that, The first fixing member, the first positioning member and the second positioning member are integrally formed.

2. The front brake lever misinstallation mark checking device according to claim 1, characterized by The first fixing member is a circular ring.

3. The front brake lever misinstallation mark checking device according to claim 1, characterized by The first positioning member and the second positioning member are both bent members.

4. The front brake lever misinstallation preventing mark checking device according to claim 3, characterized by The first positioning member includes a first segment and a second segment, and the second segment is perpendicular to the first segment.

5. The front brake lever misinstallation preventing mark checking device according to claim 1, characterized by The second positioning member includes a third segment and a fourth segment, and the fourth segment is perpendicular to the third segment.

6. The front brake lever misinstallation mark checking device according to any one of claims 1 to 5, characterized by The first positioning member is provided with a positioning mark.

7. The front brake lever misinstallation mark checking device according to any one of claims 1 to 5, characterized by The first fixing member, the first positioning member and the second positioning member are integrally formed.

8. A device for checking the presence of a misloading prevention marking on a railway wagon rear brake lever, characterized in that it comprises: The material of the first fixing member, the first positioning member and the second positioning member includes any one of stainless steel, plastic and steel.

9. The rear brake lever misinstallation mark checking device according to claim 8, characterized by The second fixing member, the third positioning member and the fourth positioning member are integrally formed.

10. The rear brake lever misinstallation mark checking device according to claim 8, characterized by The material of the second fixing member, the third positioning member and the fourth positioning member includes any one of stainless steel, plastic and steel.

11. A rear brake lever misapplication marker checking device according to any one of claims 8-10, characterized in that The method comprises the following steps:

12. A rear brake lever misapplication marker checking device according to any one of claims 8-10, characterized in that, S1. Fixing the first fixing member in the lever fulcrum of a first to-be-inspected member; 13. A method for checking the condition of the marking of the front brake lever of a railway wagon brake cylinder against misapplication, using the device for checking the marking of the front brake lever of a railway wagon brake cylinder against misapplication according to any one of claims 1 to 7, characterised in that, S2. Determining whether the first positioning member and the second positioning member coincide with first and second painted marks of the first to-be-inspected member; if yes, the first to-be-inspected member is not the front brake lever, or the first and second painted marks are painted incorrectly; if not, the first to-be-inspected member is the front brake lever. The first fixing member is a circular ring, and the outer diameter of the first fixing member is less than or equal to the inner diameter of the lever fulcrum of the first to-be-inspected member. The method comprises the following steps:

14. The method of claim 13, wherein the mark is a color mark. S1. Fixing the second fixing member in the lever fulcrum of a second to-be-inspected member; 15. A method for checking the presence of a mark on a rear brake lever of a railway wagon brake cylinder against misapplication and paint condition, using the inspection device for the mark on the rear brake lever of the railway wagon brake cylinder against misapplication and paint condition according to any one of claims 8 to 12, characterized in that, S2. Determining whether the third positioning member and the fourth positioning member point to third and fourth painted marks of the second to-be-inspected member; if yes, the second to-be-inspected member is the rear brake lever; if not, the second to-be-inspected member is not the rear brake lever, or the third and fourth painted marks are painted incorrectly. The second fixing member is a circular ring, and the outer diameter of the second fixing member is less than or equal to the inner diameter of the lever fulcrum of the second to-be-inspected member. ​ 16. The method of claim 15, wherein the mark is applied by a stamping device. ​

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