A kind of rail vehicle sanding deflector's point inspection device and point inspection method

Abstract

The present application relates to a kind of track vehicle sanding barrier's point inspection device and point inspection method, point inspection device includes main body, on the main body is installed reflector, at the outer edge of the main body has the elastic pad detection part that can be inserted into elastic pad gap, on the main body is installed with plug gauge, on the side of the main body has the first height measuring part and second height measuring part for detecting gap height, the first height measuring part and second height measuring part are formed by step structure, on the main body has the bolt detection part that is clamped in the outside of the nut to be measured.The present application is clever in structure design, easy and simple to operate, using one device can simultaneously realize the inspection of all normal point inspection projects of sanding barrier, not only can greatly improve detection efficiency, but also can effectively avoid the risk of tool proliferation and loss.

Description

Technical Field

[0001] This invention belongs to the field of testing equipment technology, and specifically relates to an inspection device and method for a sand-spreading obstacle remover for rail vehicles. Background Technology

[0002] To ensure the safe operation of rail vehicles, sand spreaders are generally installed on the bogies of rail vehicles to remove small obstacles such as gravel and pebbles from the tracks. In addition, sand is spread on the rail surface during severe weather such as rain or snow to increase the adhesion between the wheels and the rail surface and avoid the risk of wheel spin during traction or skidding during braking.

[0003] The installation structure of a sand-spreading obstacle remover generally includes a mounting arm, a bracket, and a mounting plate. The mounting arm is connected to the axle box body by multiple bolts and uses spring washers and anti-rotation washers to prevent loosening; it is one of the four unsprung components. The bracket is fixed to the other end of the mounting arm, and the mounting plate is fixed to the front end of the bracket. The sand-spreading obstacle remover is mounted on the mounting plate.

[0004] When high-speed trains and other rail vehicles are in operation, the installation and structural condition of the sand-spreading obstacle remover can easily change due to various factors such as impacts from external objects, rail corrugation, and wheel out-of-roundness. Abnormalities such as loose bolts, breakage, broken spring washers, and broken anti-rotation washers may occur. If these abnormalities are not detected and dealt with in time, they will seriously affect the operational safety of high-speed trains and other rail vehicles.

[0005] Therefore, routine inspection of the sand-spreading obstacle remover is a key task in after-sales service. Routine inspections require checking seven items: the height of the sand-spreading device's obstacle-removing rubber plate, the height of the sand-spreading nozzle, the clearance between the bracket and the mounting arm, the clearance between the round steel surface of the mounting arm and the axle box, the condition of the mounting arm's fastening bolts, the condition of the internal fasteners, and the condition of the spring washers. During routine inspections, after-sales service personnel need to carry various tools such as a steel ruler, feeler gauge, and reflector. Furthermore, for some inspection items, manual inspection is required, as there are no specialized tools available.

[0006] When after-sales service personnel conduct routine inspections of sand-spreading obstacle removers, they not only need to carry a variety of tools, which can lead to the problem of tools being numerous and easily lost, but also the need to frequently change tools and the limited space under the vehicle result in low efficiency for routine inspections. Summary of the Invention

[0007] The main technical problem solved by this invention is to provide an inspection device for a sand-spreading obstacle remover for rail vehicles. The device has an ingenious structure and is simple and convenient to operate. It can simultaneously perform all routine inspection items of the sand-spreading obstacle remover using a single device, which can not only greatly improve inspection efficiency, but also effectively avoid the risks of tool proliferation and loss.

[0008] The present invention also provides an inspection method using the inspection device of the above-mentioned rail vehicle sand spreading obstacle removal device.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows:

[0010] An inspection device for a rail vehicle sand-spreading obstacle remover includes a main body, a reflector mounted on the main body, a spring pad detection part at the outer edge of the main body for inserting into a spring pad notch, a feeler gauge mounted on the main body, a first height measuring part and a second height measuring part for detecting gap height on one side of the main body, both the first height measuring part and the second height measuring part being formed by a stepped structure, and a bolt detection part on the main body that is engaged with the outside of the nut to be tested.

[0011] Furthermore, the main body has an opening, and the reflector is embedded in the opening; or, the surface of the main body has a mounting groove, and the reflector is embedded in the mounting groove.

[0012] Furthermore, the spring pad detection part is formed by chamfering a right angle of the main body; or, the spring pad detection part is formed by a protrusion with an arc-shaped outer edge protruding outward from the outer edge of the main body.

[0013] Furthermore, a first opening groove extending along the length of the side surface of the main body is provided, and a mounting hole is provided on the main body. One end of the feeler gauge is rotatably mounted at the mounting hole, and the feeler gauge can be embedded in the first opening groove and hidden when not in use.

[0014] Furthermore, the feeler gauges include multiple feeler gauges, which are coaxially and rotatably mounted on the main body. The width of the first opening groove is greater than the sum of the thicknesses of the multiple feeler gauges, and the multiple feeler gauges can be simultaneously embedded in the first opening groove and hidden when not in use.

[0015] Furthermore, the bolt detection part is a quadrilateral second opening groove that is recessed from one side of the main body towards the opposite side, and the second opening groove matches the size of the nut to be tested.

[0016] Furthermore, the first height measuring part and the second height measuring part are formed by a first step structure and a second step structure that are progressively recessed from one side of the main body toward the opposite side, and the first step structure and the second step structure are arranged continuously or intermittently.

[0017] Furthermore, the main body surfaces at the first and second step structures are respectively engraved with scales indicating the step height.

[0018] Furthermore, the main body is machined from rectangular or square stainless steel plates.

[0019] Another technical solution of the present invention is:

[0020] An inspection method for an inspection device employing the aforementioned rail vehicle sand-spreading obstacle remover specifically includes the following steps:

[0021] The height of the obstacle removal rubber plate is measured using the first height measuring unit. The lowest step of the first height measuring unit can be inserted into the gap between the obstacle removal rubber plate and the rail surface, while the highest step cannot be inserted into the gap. This indicates that the installation height of the obstacle removal rubber plate is within the standard range; otherwise, it is abnormal.

[0022] The height of the sand spraying nozzle is measured using the second height measuring unit. The lowest step of the second height measuring unit can be inserted into the gap between the sand spraying nozzle and the rail surface, while the highest step cannot be inserted into the gap. This indicates that the installation height of the obstacle removal rubber plate is within the standard range; otherwise, it is abnormal.

[0023] Using feeler gauges of different sizes, insert them sequentially into the gap between the bracket and the mounting arm, as well as into the gap between the round steel surface of the mounting arm and the axle box. If the feeler gauge cannot be inserted into the corresponding gap, the gap is considered acceptable; otherwise, it is abnormal.

[0024] By inserting the spring pad detection part into the notch of the spring pad and pulling the spring pad, the spring pad can be pulled to determine if the spring pad is in an abnormal state; otherwise, it is in a normal state.

[0025] The bolt inspection unit is inserted into the fastening nut of the mounting arm to check the bolt tightness. The inspection device is rotated. If the nut cannot be turned, the condition is normal; otherwise, the condition is abnormal.

[0026] Use a reflector placed inside the fastener to check for any damage to its appearance.

[0027] In summary, the inspection device and method for a rail vehicle sand-spreading obstacle remover provided by this invention have the following advantages compared with the prior art:

[0028] (1) The device has a clever structural design and is simple and convenient to operate. It integrates multiple functions and can simultaneously perform all routine inspection items of the sand-spreading obstacle remover using one device. That is, one device can meet all seven inspection requirements: “obstacle removal rubber plate height”, “sand-spreading nozzle height measurement”, “bracket and mounting arm fit clearance measurement”, “mounting arm round steel surface and axle box clearance measurement”, “mounting arm fastening bolt status”, “inner fastener status inspection”, and “spring pad status inspection”. It can not only greatly improve the inspection efficiency, but also effectively avoid the risks of tool proliferation and loss. Moreover, it is easy to carry due to its small size.

[0029] (2) The device optimizes the items that were previously confirmed by human visual inspection and manual verification in the prior art into items that can be directly measured by the device, which not only improves the efficiency of the census but also enhances the accuracy of the detection.

[0030] (3) The device is made of stainless steel plate by machining. Under the premise of meeting all the testing requirements, the overall size is small and easy to hold and operate. Attached Figure Description

[0031] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0032] Figure 1 This is a schematic diagram of the installation structure of the sand-spreading obstacle remover of the present invention;

[0033] Figure 2 This is a schematic diagram of the inspection device of the present invention;

[0034] Figure 3 yes Figure 2 AA sectional view.

[0035] like Figures 1 to 3 As shown, the components include: 1. Sand spreading obstacle remover; 2. Mounting arm; 3. Bracket; 4. Mounting plate; 5. Bolt; 6. Axle box body; 7. Obstacle removal rubber plate; 8. Sand spreading nozzle; 9. Wheel; 10. Main body; 11. Reflector; 12. Spring pad detection part; 13. Mounting hole; 14. Side surface; 15. First opening groove; 16. Nut to be tested; 17. Bolt detection part; 18. Second opening groove; 19. First height measuring part; 20. Second height measuring part; 21. First step structure; 22. Second step structure; 23. Side.

[0036] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] like Figures 1 to 3 As shown, the present invention provides an inspection device for a rail vehicle sand spreader and obstacle remover, which is used to complete the routine inspection of the sand spreader and obstacle remover 1 installed on the bogie.

[0041] like Figure 1 As shown, the sand-spreading obstacle remover 1 is installed on the bogie. The installation structure of the sand-spreading obstacle remover 1 generally includes a mounting arm 2, a bracket 3, and a mounting plate 4. The mounting arm 2 is fixedly connected to the axle box 6 by multiple bolts 5, and spring washers and anti-rotation washers are used to prevent loosening. The bracket 3 is fixed to the other end of the mounting arm 2, and the mounting plate 4 is fixed to the front end of the bracket 3. The sand-spreading obstacle remover 1 is installed on the mounting plate 4.

[0042] The mounting arm 2 has a straight, linear structure. The upper circular steel surface at one end of the mounting arm 2 serves as the mounting plane. It is horizontally fixed to the lower part of the axle box 6 by multiple bolts 5. Each bolt 5 is equipped with a spring washer and an anti-rotation washer (not shown in the figure). After installation, the rotating rubber plate 7 ensures a set safe distance between itself and the rail surface. The sand-spreading nozzle 8 in the sand-spreading obstacle remover 1 faces the front of the wheel 9 after installation and maintains a set safe distance from the rail surface.

[0043] The inspection device for the rail vehicle sand-spreading obstacle remover provided by the present invention is used to complete the routine inspection items of the sand-spreading obstacle remover 1, including: "measurement of the installation height of the obstacle removal rubber plate", "measurement of the installation height of the sand-spreading nozzle", "fitting gap between the bracket and the mounting arm", "measurement of the gap between the round steel surface of the mounting arm and the axle box", "condition of the fastening bolts of the mounting arm", "inspection of the condition of the inner fasteners" and "inspection of the condition of the spring pad".

[0044] like Figure 2 and Figure 3As shown, the inspection device for the rail vehicle sand-spreading obstacle remover provided by the present invention includes a main body 10, which preferably adopts a rectangular or square flat plate structure. Based on the size requirements of each inspection item, in this embodiment, it is preferably made of a 130mm×70mm×3mm stainless steel plate by machining. This ensures that the overall size is compact, easy to hold and operate, and not limited by the inspection space, while meeting all inspection requirements.

[0045] A reflector 11 is mounted on the main body 10, located on the left side. The reflector 11 extends into the interior of fasteners that are not easily visible to the naked eye, allowing maintenance personnel to easily observe damage to the inner fasteners, such as scratches from foreign objects impacting the surface. In this embodiment, the reflector 11 can be designed as follows: Figure 2 The square shape shown can also be rectangular or circular. The surface of the main body 10 has a mounting groove (not shown) that matches the shape of the reflector 11. For example, a 51mm × 51mm × 2mm mounting groove can be cut into the surface of a stainless steel plate, and the reflector 11 can be embedded in the mounting groove, making it both compact and durable. Alternatively, an opening matching the shape of the reflector 11 can be directly cut into the main body 10, such as a rectangular opening, and the reflector 11 can be embedded in this opening.

[0046] The spring washer mounted on bolt 5 generally has a notch (not shown in the figure). At the outer edge of the main body 10, there is a spring washer detection part 12 that can be inserted into the spring washer notch. During the test, the spring washer detection part 12 is inserted into the spring washer notch and the spring washer is pulled with force. If the spring washer can be pulled, it means that the spring washer is loose and does not meet the requirements, and needs to be tightened or replaced; if the spring washer cannot be pulled, it means that the condition of the spring washer meets the requirements.

[0047] In this embodiment, the spring pad detection part 12 is formed directly from a right-angled chamfer of the main body 10, such as... Figure 1 The right-angle chamfer at the upper left corner serves as the spring pad detection part 12, which simplifies the structure and eliminates the need for additional processing. Of course, the spring pad detection part 12 can also adopt another structure, which is formed by a protrusion with an arc-shaped outer edge (not shown in the figure) protruding outward from the outer edge of the main body 10. That is, another protrusion protrudes outward from the main body 10. The protrusion can be set at a right angle or at other positions on the edge of the main body 10. The protrusion is inserted into the spring pad notch. Since the length of the protrusion is longer, it is easier to pull it out and it will not easily slip out.

[0048] A feeler gauge (not shown in the figure) is mounted on the main body 10. The feeler gauge is a thin metal sheet with a specified thickness. A mounting hole 13 is opened on the main body 10 at another right angle on the same side as the spring pad detection part 12. For ease of use, the feeler gauge is preferably rotatably mounted in the mounting hole 13 via a pivot.

[0049] In this embodiment, more preferably, a first opening groove 15 extending along the length direction of the side surface 14 (i.e., the side where the mounting hole 13 is opened) on one side of the main body 10 is provided. When not in use, the feeler gauge can be embedded in the first opening groove 15 and hidden. When testing is required, the feeler gauge can be rotated out of the first opening groove 15. This helps to protect the feeler gauge and also avoids the feeler gauge being too long and affecting the testing of other items.

[0050] Because the inspection items for the sand-spreading obstacle remover 1 include two gap checks: the fit gap between the bracket 3 and the mounting arm 2, and the gap between the round steel surface of the mounting arm 2 and the axle box 6, and the requirements for these two gaps are different, two feeler gauges of different specifications need to be used for testing. One feeler gauge has a specification of 0.03mm, and the other has a specification of 0.05mm. In this embodiment, preferably, the two feeler gauges are coaxially and rotatably mounted on the main body 10. The width of the first opening groove 15 is greater than the sum of the thicknesses of the two feeler gauges. Preferably, the width of the first opening groove 15 is 1mm. When not in use, the two feeler gauges can be simultaneously embedded and hidden in the first opening groove 15. When the gap size needs to be checked, the corresponding feeler gauge can be unscrewed. If the feeler gauge can be inserted into the gap being measured, it indicates that the gap is too large and does not meet the requirements, and needs to be readjusted. If the feeler gauge cannot be inserted into the gap being measured, it indicates that the gap meets the requirements.

[0051] The main body 10 has a bolt detection part 17 that engages with the outside of the nut 16 to be tested, used to detect the tightness of the bolts 5 on the mounting arm 2. In this embodiment, to facilitate the engagement of the nut 16 to be tested from one side, the bolt detection part 17 is preferably a quadrilateral second opening groove 18 recessed from one side of the main body 10 towards the opposite side, and the second opening groove 18 matches the size of the nut 16 to be tested. To make the structure more compact, the second opening groove 18 of the bolt detection part 17 is located on the same side as the first opening groove 15. At the same time, to ensure that the length of the first opening groove 15 can meet the length of the feeler gauge, the first opening groove 15 is formed on both side surfaces 14 of the second opening groove 18. When testing the tightness of the bolt, the second opening slot 18 is clamped onto the nut 16 to be tested from one side. The device is rotated. If the nut 16 to be tested can be turned, it indicates that the bolt tightness is abnormal and does not meet the requirements. It needs to be tightened or replaced. If the nut 16 to be tested cannot be turned, it indicates that the bolt tightness is normal.

[0052] On one side of the main body 10, there is a first height measuring part 19 and a second height measuring part 20 for detecting the gap height. In this embodiment, preferably, the first height measuring part 19 and the second height measuring part 20 are formed by a first step structure 21 and a second step structure 22 that are progressively recessed from the side 23 of the main body 10 toward the opposite side. Whether the height meets the minimum requirement is determined by whether the lowest step area in each step structure can be inserted into the space to be measured, and whether the height meets the maximum requirement is determined by whether the highest step area can be inserted into the space to be measured.

[0053] The first step structure 21 and the second step structure 22 can be set continuously or intermittently according to the height setting. In this embodiment, for example... Figure 2 As shown, the first step structure 21 and the second step structure 22 are intermittently arranged. Scales indicating the step height are engraved on the surface of the main body 10 at both the first step structure 21 and the second step structure 22. The first step structure 21 is used to measure the installation height of the obstacle-clearing rubber sheet, with a minimum step height of 5mm and a maximum step height of 13mm. The second step structure 22 is used to measure the installation height of the sand-spraying nozzle, with a minimum step height of 40mm and a maximum step height of 60mm. The height of both steps is based on the side surface 14 perpendicular to the side edge 23 as the positioning reference.

[0054] This invention also provides an inspection method using the above-mentioned rail vehicle sand-spreading obstacle removal device, specifically including the following steps:

[0055] The height of the obstacle removal rubber plate 7 is measured using the first height measuring unit 19. The lowest step (5mm) in the first step structure 21 can be inserted into the gap between the obstacle removal rubber plate 7 and the rail surface, while the highest step (13mm) cannot be inserted into the gap. It is determined that the installation height of the obstacle removal rubber plate 7 is within the standard range, otherwise it is abnormal.

[0056] The height of the sand-spraying nozzle 8 is measured using the second height measuring unit 20. The lowest step (40mm) of the second step structure 22 can be inserted into the gap between the sand-spraying nozzle 8 and the rail surface, while the highest step (60mm) cannot be inserted into the gap. This indicates that the installation height of the sand-spraying nozzle 8 is within the standard range; otherwise, it is abnormal.

[0057] Using feeler gauges of 0.03mm and 0.05mm, insert them sequentially into the gap between the bracket and the mounting arm, and into the gap between the round steel surface of the mounting arm and the axle box. If the feeler gauge cannot be inserted into the corresponding gap, the gap is considered acceptable; otherwise, it is abnormal.

[0058] By inserting the spring pad detection part 12 into the notch of the spring pad and pulling the spring pad, the spring pad can be pulled to determine if the spring pad is in an abnormal state, and vice versa.

[0059] The bolt detection part 17 is inserted into the nut 16 to be tested on the mounting arm 2 to check the bolt tightness. The inspection device is rotated. If the nut 16 cannot be turned, it means that the nut 16 and the bolt are in a tight state and are judged to be in normal condition. Otherwise, it is in an abnormal state.

[0060] Use the reflector 11 placed inside the fastener to check for any damage to its appearance.

[0061] The above testing order can be changed arbitrarily according to needs and operating habits, and the above order should not be regarded as a limitation on the scope of protection.

[0062] This device features an ingenious design and simple, convenient operation, integrating multiple functions into one device. It can simultaneously perform all routine inspection items of the sand-spreading obstacle remover using a single device. Specifically, it can meet all seven inspection requirements: "obstacle removal rubber plate height," "sand-spreading nozzle height measurement," "bracket and mounting arm fit clearance measurement," "mounting arm round steel surface and axle box clearance measurement," "mounting arm fastening bolt status," "internal fastener status inspection," and "spring pad status inspection." This not only significantly improves inspection efficiency but also effectively avoids the risks of tool proliferation and loss. Furthermore, its compact size makes it easy to carry.

[0063] In addition, this device optimizes the existing technology of visual and manual confirmation of items into direct measurement by the device, which not only improves the efficiency of the census but also enhances the accuracy of the detection.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An inspection device for a sand-spreading obstacle remover on a rail vehicle, characterized in that: The device includes a main body, on which a reflector is mounted, a spring pad detection part at the outer edge of the main body for inserting into the spring pad notch, a feeler gauge mounted on the main body, a first height measuring part and a second height measuring part for detecting the gap height on one side of the main body, both the first height measuring part and the second height measuring part being formed by a stepped structure, and a bolt detection part on the main body that is locked onto the outside of the nut to be tested.

2. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 1, characterized in that: The main body has an opening, and the reflector is embedded in the opening; or, the surface of the main body has a mounting groove, and the reflector is embedded in the mounting groove.

3. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 1, characterized in that: The spring pad detection part is formed by chamfering a right angle of the main body; or, the spring pad detection part is formed by a protrusion with an arc-shaped outer edge protruding outward from the outer edge of the main body.

4. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 1, characterized in that: The main body has a first opening groove extending along the length of the side surface, and a mounting hole is provided on the main body. One end of the feeler gauge is rotatably mounted at the mounting hole, and the feeler gauge can be embedded in the first opening groove and hidden when not in use.

5. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 4, characterized in that: The feeler gauges include multiple feeler gauges, which are coaxially and rotatably mounted on the main body. The width of the first opening groove is greater than the sum of the thicknesses of the multiple feeler gauges. When not in use, the multiple feeler gauges can be simultaneously embedded in the first opening groove and hidden.

6. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 1, characterized in that: The bolt detection part is a quadrilateral second opening groove that is recessed from one side of the main body towards the opposite side, and the second opening groove matches the size of the nut to be tested.

7. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 1, characterized in that: The first height measuring part and the second height measuring part are formed by a first step structure and a second step structure that are progressively recessed from one side of the main body toward the opposite side. The first step structure and the second step structure are arranged continuously or intermittently.

8. The inspection device for the rail vehicle sand spreading and obstacle removal device according to claim 7, characterized in that: The main surfaces of the first and second step structures are respectively engraved with scales indicating the step height.

9. The inspection device for a rail vehicle sand-spreading obstacle remover according to any one of claims 1-8, characterized in that: The main body is machined from rectangular or square stainless steel plates.

10. An inspection method using an inspection device for a rail vehicle sand-spreading obstacle remover as described in any one of claims 1-9, characterized in that, Includes the following steps: The height of the obstacle removal rubber plate is measured using the first height measuring unit. The lowest step of the first height measuring unit can be inserted into the gap between the obstacle removal rubber plate and the rail surface, while the highest step cannot be inserted into the gap. This indicates that the installation height of the obstacle removal rubber plate is within the standard range; otherwise, it is abnormal. The height of the sand spraying nozzle is measured using the second height measuring unit. The lowest step of the second height measuring unit can be inserted into the gap between the sand spraying nozzle and the rail surface, while the highest step cannot be inserted into the gap. This indicates that the installation height of the obstacle removal rubber plate is within the standard range; otherwise, it is abnormal. Using feeler gauges of different sizes, insert them sequentially into the gap between the bracket and the mounting arm, as well as into the gap between the round steel surface of the mounting arm and the axle box. If the feeler gauge cannot be inserted into the corresponding gap, the gap is considered acceptable; otherwise, it is abnormal. By inserting the spring pad detection part into the notch of the spring pad and pulling the spring pad, the spring pad can be pulled to determine if the spring pad is in an abnormal state; otherwise, it is in a normal state. The bolt inspection unit is inserted into the fastening nut of the mounting arm to check the bolt tightness. The inspection device is rotated. If the nut cannot be turned, the condition is normal; otherwise, the condition is abnormal. Use a reflector placed inside the fastener to check for any damage to its appearance.

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