A measuring tool for the guide surface of a railway freight car axle wheel seat

Abstract

This utility model relates to the field of railway freight car axle wheel seat guide surface measurement technology, specifically disclosing a railway freight car axle wheel seat guide surface measurement tool, including: a ruler plate, a gripping part at one end of the ruler plate, the gripping part providing a gripping space for taking the ruler plate, a ruler strip part on one side of the gripping part, a measuring component on the ruler strip part, and an arc part integrally formed between the gripping part and the ruler strip part, the arc part being used to fit against the arc surface of the front shoulder of the wheel seat. Through reasonable design, it not only satisfies the accuracy of measuring the length of the wheel seat guide surface, but also incidentally checks the conformity of the arc of the front shoulder of the wheel seat, greatly improving the detection speed, improving work efficiency, reducing the labor intensity of workers, and the design of anti-slip protrusions, hanging holes and high-strength aluminum alloy material makes the tool have good durability and portability.

Description

Technical Field

[0001] This utility model relates to the field of railway freight car axle wheel seat guide surface measurement technology, specifically a railway freight car axle wheel seat guide surface measurement tool. Background Technology

[0002] The measuring tool for the guide surface of a railway freight car axle wheel seat is used to measure the guide surface of the wheel seat. The guide surface dimension of the wheel seat is an important part of the three diameters of the railway freight car axle. Since the three diameters of the railway freight car axle are crucial processing parts, affecting the installation and fit of running components such as wheelset assembly and bearing press-fitting, accurate measurement of the axle wheel seat guide surface is a strong guarantee for product processing quality.

[0003] Currently, all manufacturers of railway freight car axles in China use steel rulers to measure the wheel seat guide surface. However, using a steel ruler makes it difficult to control the reference point. Either the wheel seat guide surface can be used to transition to the front shoulder arc of the wheel seat, or the guide surface can be used to transition to the wheel seat itself. Both reference points are lines, making accurate positioning impossible. Judgment relies heavily on operator experience, resulting in significant errors. Furthermore, the reference line changes position depending on the wheel seat diameter, leading to inaccurate measurements, large measurement errors, and unstable results. This often results in non-conforming products and a low first-pass yield, negatively impacting subsequent wheelset assembly and bearing press-fitting. Therefore, we propose a measuring tool for the wheel seat guide surface of railway freight car axles. Utility Model Content

[0004] The purpose of this utility model is to provide a measuring tool for the guide surface of a railway freight car axle wheel seat, in order to solve the problems mentioned in the background art, such as the inability of steel ruler measurement to accurately position the wheel seat, the reliance on operator experience for judgment, the large error, the fact that the baseline changes position with the wheel seat diameter, resulting in inaccurate measurement values, large measurement errors, unstable measurement results, frequent non-conforming cases, low first-pass yield, and adverse effects on subsequent wheelset assembly, bearing press-fitting, etc.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a measuring tool for the guide surface of a railway freight car axle wheel seat, comprising a ruler plate, a gripping part at one end of the ruler plate providing a gripping space for taking the ruler plate, a ruler strip part on one side of the gripping part, a measuring component on the ruler strip part, and an arc part integrally formed between the gripping part and the ruler strip part, the arc part being used to fit against the arc surface of the front shoulder of the wheel seat to ensure good contact between the tool and the measured part during measurement, thereby improving the accuracy of the measurement.

[0006] The grip surface is provided with anti-slip bumps, which are hemispherical and evenly distributed on the grip surface. The anti-slip bumps can effectively increase the friction between the hand and the grip surface when the user holds the ruler, preventing the ruler from slipping due to sweaty hands or shaking during operation, thus ensuring the smooth progress of the measurement work.

[0007] The grip section has a hanging hole at the end, which makes it easy to hang the tool by hanging a rope or hook. The inner wall of the hanging hole is tightly fitted with a rubber ring.

[0008] The measuring component includes a scale on the surface of the ruler strip, with an arc-shaped groove at the starting point of the scale to facilitate alignment of the measurement starting point and improve measurement efficiency.

[0009] The arc section is a smooth arc shape that smoothly transitions from the bottom of the ruler plate to the ruler strip. The radius of curvature of the arc section can be set to R30mm. The arc section fits perfectly with the arc surface of the front shoulder of the wheel seat, thus providing a stable reference surface for subsequent measurements.

[0010] The ruler is made of high-strength aluminum alloy, which makes it convenient for users to operate for a long time.

[0011] The ruler has rounded and chamfered corners on all four sides. These rounded and chamfered corners effectively eliminate sharp edges, preventing scratches to the user's hands or damage to the surface of the part being measured during use. They also reduce edge wear caused by collisions during storage and transportation, improving the tool's safety and durability.

[0012] This utility model has at least the following beneficial effects:

[0013] When in use, this utility model, through its reasonable design, not only satisfies the accuracy of measuring the length of the wheel seat guide surface, but also simultaneously checks the conformity of the wheel seat front shoulder arc, greatly improving the detection speed. The integration of the two detection functions reduces the detection cost. Furthermore, the design of anti-slip protrusions, hanging holes, and high-strength aluminum alloy material gives the tool good durability and portability, making it an ideal measuring tool for detecting the length of the guide surface of railway freight car axle wheel seats. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the gripping part of this utility model;

[0016] Figure 3 This is a schematic diagram of the ruler section of this utility model;

[0017] Figure 4 This is an enlarged schematic diagram of area A of this utility model.

[0018] In the diagram: 1. Ruler plate; 2. Grip part; 21. Anti-slip protrusions; 22. Hanging hole; 23. Rubber ring; 3. Ruler strip; 4. Measuring component; 41. Scale; 42. Arc-shaped groove; 5. Arc part; 6. Rounded corner; 7. Chamfer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a measuring tool for the guide surface of a railway freight car axle wheel seat, comprising: a ruler plate 1, a gripping part 2 at one end of the ruler plate 1 providing a gripping space for holding the ruler plate 1, a ruler strip part 3 on one side of the gripping part 2, a measuring component 4 on the ruler strip part 3, and an arc part 5 integrally formed between the gripping part 2 and the ruler strip part 3, the arc part 5 being used to fit against the arc surface of the front shoulder of the wheel seat. In use, the measuring component 4 is used to accurately measure the relevant dimensions of the guide surface of the railway freight car axle wheel seat. The shape of the arc part 5 is adapted to the arc surface of the front shoulder of the wheel seat, allowing it to fit tightly against the arc surface of the front shoulder of the wheel seat, providing a stable reference surface for measurement and ensuring measurement accuracy.

[0022] The grip part 2 has anti-slip protrusions 21 on its surface. The anti-slip protrusions 21 are used to increase the friction when gripping the ruler 1. The anti-slip protrusions 21 are uniformly distributed hemispherical. By increasing the roughness of the grip part 2 surface, the friction when the operator grips the ruler 1 is increased, preventing the ruler 1 from slipping in the hand. It is especially suitable for measurement operations in harsh environments such as humid and greasy conditions, thereby improving the stability of the measurement operation.

[0023] The grip part 2 has a hanging hole 22 at the tail. A rubber ring 23 is tightly fitted to the inner wall of the hanging hole 22. The size of the hanging hole 22 is moderate, which makes it easy to hang the measuring tool in a designated position by hooks, ropes, etc., for easy storage and use. The rubber ring 23 has a certain elasticity and wear resistance, which can reduce the wear when the hanging hole 22 comes into contact with hooks, etc., extend the service life of the hanging hole 22, and increase the stability when hanging, preventing the measuring tool from falling accidentally.

[0024] The measuring component 4 includes a scale 41 on the surface of the ruler strip 3. The starting part of the scale 41 has an arc-shaped groove 42. The scale 41 is etched on the surface of the ruler strip 3. The accuracy of the scale 41 meets the standard requirements for measuring the guide surface of the wheel seat of a railway freight car axle, which can meet the needs of accurate measurement. The arc-shaped groove 42 can reduce the rigid contact between the ruler strip and the edge of the wheel seat guide surface during measurement, so that the starting point of the scale 41 line can be better aligned with the root of the journal on the arc surface of the front shoulder of the wheel seat, improving the starting positioning accuracy of the measurement, avoiding friction, and increasing the service life of the tool.

[0025] The arc-shaped section 5 smoothly transitions from the bottom of the ruler plate 1 to the ruler strip section 3. The radius of curvature of the arc-shaped section 5 is R30 mm. This arc-shaped design is compatible with the arc surface of the front shoulder of the axle wheel seat, ensuring a tight fit between the arc-shaped section 5 and the arc surface of the front shoulder of the axle wheel seat. Using the arc surface of the front shoulder of the axle wheel seat as the detection and positioning reference ensures measurement accuracy and also checks the conformity of the front shoulder arc of the wheel seat, improving work efficiency. This radius of curvature is determined based on the common design dimensions and measurement requirements of the front shoulder arc of railway freight car axle wheel seats. It can fit well with the front shoulder arc surface of most railway freight car axle wheel seats, ensuring the consistency of the measurement reference. Furthermore, the radius of curvature of the arc-shaped section is not limited to R30 mm; different radius models of the arc-shaped section 5 can be used to measure different wheel seats.

[0026] Ruler plate 1 is made of high-strength aluminum alloy. Aluminum alloy has the advantages of being lightweight, high-strength, and corrosion-resistant, which makes the measuring tool easy for operators to carry and use. It can also maintain good performance under the complex environmental conditions during railway freight car operation, and is not prone to deformation or damage, thus extending the service life of the measuring tool and improving its durability.

[0027] During use, the bottom of the ruler is pressed tightly against the dustproof plate seat by holding the tool. When measuring, the ruler is moved towards the wheel seat until the arc part 5 is in contact with the arc of the front shoulder of the wheel seat. At this time, the ruler strip 3 is parallel to the wheel seat and the zero point will not change with the size of the wheel seat diameter, ensuring the accuracy of the wheel seat length. While measuring the length of the wheel seat guide surface, the conformity of the front shoulder arc of the wheel seat can also be checked, improving the detection speed.

[0028] Example 2

[0029] In this second embodiment, the other structures remain unchanged. The difference from the first embodiment is that the ruler 1 has rounded corners 6 and chamfers 7 at its four corners. The reasonable design of rounded corners 6 and chamfers 7 can effectively eliminate the sharp edges of the four corners of the ruler 1, avoid scratching the operator or damaging the surface of the object being measured during use, and improve the safety and reliability of the measuring tool. At the same time, this design can also reduce the damage to the ruler 1 when it collides with other objects during transportation and storage, and improve the durability of the tool.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A measuring tool for the guide surface of a railway freight car axle wheel seat, comprising: The ruler plate is characterized in that: a gripping part is provided at one end of the ruler plate, the gripping part provides a gripping space for taking the ruler plate, a ruler strip part is provided on one side of the gripping part, a measuring component is provided on the ruler strip part, and an arc part is integrally formed between the gripping part and the ruler strip part, the arc part is used to fit against the arc surface of the front shoulder of the wheel seat.

2. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The grip surface is provided with anti-slip protrusions, which are hemispherical and evenly distributed on the grip surface.

3. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The grip portion has a hanging hole at its tail, and a rubber ring is tightly fitted to the inner wall of the hanging hole.

4. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The measuring component includes a scale on the surface of the ruler strip, and the starting part of the scale has an arc-shaped groove.

5. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The arc portion is a smooth arc shape that smoothly transitions from the bottom of the ruler plate to the ruler strip. The radius of curvature of the arc portion can be set to R30mm.

6. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The ruler is made of high-strength aluminum alloy.

7. The railway freight car axle wheel seat guide surface measuring tool according to claim 1, characterized in that: The ruler has rounded and chamfered corners at all four corners.

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