A noise reduction groove top diameter measuring scale for graphite type cast steel urban rail vehicle wheels

Abstract

This utility model relates to the field of measuring noise reduction grooves on cast steel urban rail vehicles. Specifically, it relates to a measuring ruler for the top diameter of noise reduction grooves on graphite-type cast steel urban rail vehicles, comprising: a main ruler with graduation lines along its length; two movable support parts, each located at one end of the main ruler, each supporting part including a connected support rod and a first frame, the first frame being fitted onto the outside of the main ruler and movable along it, the first frame having a first locking part; a positioning ruler frame, mounted on the main ruler, the positioning ruler frame having a second locking part; a fixed measuring claw, fixedly connected to the main ruler, the fixed measuring claw having a measuring head; and a movable measuring claw auxiliary ruler, mounted on the main ruler via a second frame, the second frame having a third locking part; the movable measuring claw auxiliary ruler also having a measuring head. It can measure different diameters of the top diameter of the inner and outer noise reduction grooves on graphite-type cast steel urban rail vehicles, ensuring the accuracy of the measurement operation.

Description

Technical Field

[0001] This utility model relates to the field of measuring the noise reduction groove of cast steel urban rail vehicles, specifically, to a measuring ruler for the top diameter of the noise reduction groove of a graphite-type cast steel urban rail vehicle. Background Technology

[0002] In the field of rail transit, the noise reduction performance of graphite-type cast steel urban rail wheels is crucial, and the design of the noise reduction grooves directly affects the wheel's noise reduction effect. However, in actual production, due to the large size of graphite-type cast steel urban rail wheels, although the top diameters of the inner and outer noise reduction grooves differ by only 13mm (for example, the inner groove might have one diameter while the outer groove has another), their tolerance requirements are extremely strict (only ±0.2mm). Furthermore, the distance from the center of the noise reduction groove to the wheel rim surface is consistent (both are 23mm).

[0003] Traditional measurement methods may have the following problems:

[0004] 1. Different measuring tools are needed to measure the top diameter of the inner and outer noise reduction grooves respectively.

[0005] 2. Errors can easily occur during the measurement process due to different measuring forces applied by humans, making it difficult to meet strict tolerance requirements. Utility Model Content

[0006] The purpose of this utility model is to provide a measuring ruler for the top diameter of the noise reduction groove of a graphite-type cast steel urban rail vehicle, which can measure different diameters of the top diameter of the noise reduction groove on the inner and outer sides of the graphite-type cast steel urban rail vehicle and ensure the accuracy of the measurement operation.

[0007] The technical solution of this utility model is implemented as follows:

[0008] A graphite-type cast steel urban rail vehicle wheel noise-reducing groove top diameter measuring ruler includes:

[0009] The main scale has graduation lines along its length.

[0010] The movable support is provided in two parts, which are respectively located at both ends of the main scale. The movable support includes a support rod connected to each other and a first frame. The first frame is sleeved on the outside of the main scale and can move along the main scale. The first frame is provided with a first locking part, which is used to lock and fix the main scale to the first frame. The bottom of the support rod is used to support the surface of the graphite cast steel urban rail wheel rim.

[0011] A positioning frame is fitted around the outside of the main ruler and can move along the main ruler. The positioning frame is provided with a second locking part for locking and fixing the positioning frame to the main ruler.

[0012] A fixed measuring claw is fixedly connected to the main scale, and the fixed measuring claw is located between the movable support part and the positioning scale frame at the left end. A measuring head is provided on the fixed measuring claw, and the measuring head is used to insert into the noise reduction groove of the wheel and press against the inner wall of the noise reduction groove for positioning.

[0013] A movable measuring claw auxiliary ruler is mounted on the main ruler via a second frame. The second frame is provided with a third locking part for locking the movable measuring claw auxiliary ruler and the main ruler. The movable measuring claw auxiliary ruler is located between the positioning ruler frame and the movable support part at the right end. The movable measuring claw auxiliary ruler is also provided with a measuring head, and the measuring head on the movable measuring claw auxiliary ruler is correspondingly arranged with the measuring head on the fixed measuring claw to be inserted into the opposite sides of the noise reduction groove and measure the top diameter of the noise reduction groove.

[0014] Furthermore, a tension spring is connected between the movable measuring claw and the positioning ruler frame.

[0015] Furthermore, the fixed measuring claw and the main scale are an integral structure, and the measuring head is provided at the left end of the bottom of the fixed measuring claw.

[0016] Furthermore, the measuring head is provided at the right end of the bottom of the movable measuring claw auxiliary scale, and the fixed measuring claw and the movable measuring claw form a figure-eight structure.

[0017] Furthermore, the support rod includes:

[0018] The top of the pole is fixedly connected to the first frame, and the bottom of the pole has an upward lifting groove.

[0019] A lifting rod is located in a lifting groove and can move up and down along the lifting groove;

[0020] A support plate is provided at the bottom of the lifting rod. The bottom surface of the support plate is a support positioning surface, which is used to support the surface of the graphite-type cast steel urban rail wheel rim.

[0021] A fourth locking part is provided on the rod body, which is used to lock the lifting rod and the rod body.

[0022] Furthermore, the lifting rod is provided with scale lines from top to bottom.

[0023] Furthermore, a longitudinal observation groove is provided on the side of the rod for observing the scale lines on the lifting rod.

[0024] Furthermore, the fourth locking part is a locking bolt, and the fourth locking part is located at the lower part of the rod.

[0025] Furthermore, the probe is a cylindrical probe made of metal.

[0026] Furthermore, the first locking part, the second locking part, and the third locking part all use locking bolts.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] This application provides a graphite-type cast steel urban rail vehicle wheel noise reduction groove top diameter measuring ruler. When measuring the top diameter of the noise reduction groove, the fixed measuring claw probe is first placed into the wheel noise reduction groove, while the bottoms of the two movable support parts are placed on the wheel rim surface. Then, the probe of the movable measuring claw auxiliary ruler is moved into the radial noise reduction groove of the wheel. When both probes simultaneously press against the inner wall of the noise reduction groove, a reading can be taken and recorded on the scale of the main ruler, achieving accurate measurement of the noise reduction groove top diameter. This measuring ruler can be used to measure the top diameter of both the inner and outer noise reduction grooves of the wheel, without requiring tool changes for measuring the inner and outer grooves. Due to its ingenious design, it can adapt to noise reduction grooves of different diameters while ensuring high accuracy of the measurement results. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an axonometric drawing of the measuring ruler of this utility model;

[0031] Figure 2 This is a front view of the measuring ruler of this utility model (flipped 90° to the left).

[0032] Figure 3 This utility model Figure 2 A partial structural diagram within the K-frame;

[0033] Figure 4 A schematic diagram showing the location and dimensions of the noise reduction grooves inside and outside the graphite-type cast steel urban rail vehicle wheel;

[0034] Figure 5 This is an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the measuring ruler of this utility model measuring the top diameter of the noise reduction groove on the inner side of a wheel.

[0036] In the picture:

[0037] 1-Main scale; 101-Horizontal graduation line;

[0038] 2-Moving support part; 201-Support rod; 2011-Rod body; 2012-Lifting rod; 2013-Support plate; 2014-Fourth locking part; 2015-Longitudinal scale line;

[0039] 202 - First frame; 203 - First locking part;

[0040] 3-Positioning frame; 4-Second locking part;

[0041] 5-Fixed measuring claw; 501-First inclined portion; 502-First lateral extension portion;

[0042] 6-Modular measuring jaw auxiliary scale; 601-Second frame; 602-Second inclined part; 603-Second lateral extension part; 604-Third locking part;

[0043] 7-Probe; 8-Tension spring. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model 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 limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0051] Example

[0052] Reference Figures 1-5 (All dimensions in the figure are in millimeters), a graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler includes:

[0053] Main scale 1 is horizontally set and has scale lines along its length. The scale lines on the main scale 1 are horizontal scale lines 101, which are used to take readings when measuring the top diameter of the noise reduction tank.

[0054] The movable support 2 has two parts, each located at one end of the main scale 1. Each movable support 2 includes a connected support rod 201 and a first frame 202. The first frame 202 is fitted onto the outside of the main scale 1 without any gap. The first frame 202 is slidably connected to the main scale 1 and can move laterally along the main scale 1. The absence of gaps ensures that the first frame 202 will not wobble during lateral movement. A first locking part 203 is provided on the first frame 202 to lock and fix the main scale 1 to the first frame 202. The bottom of the support rod 201 is used to support the surface of the graphite-type cast steel urban rail wheel rim.

[0055] The positioning frame 3 is fitted onto the main ruler 1 without any gap between them. The positioning frame 3 is slidably connected to the main ruler 1 and can move laterally along the main ruler 1. Since there is no gap between them, the positioning frame 3 will not wobble when it moves laterally. The positioning frame 3 is provided with a second locking part 4 for locking and fixing the positioning frame 3 to the main ruler 1.

[0056] Fixed measuring claw 5 is fixedly connected to the main ruler 1, and the fixed measuring claw 5 is located between the movable support part 2 and the positioning ruler frame 3 at the left end. The fixed measuring claw 5 is provided with a measuring head 7, which is used to insert into the noise reduction groove of the wheel and press against the inner wall of the noise reduction groove for positioning.

[0057] The movable measuring claw auxiliary ruler 6 is mounted on the main ruler 1 via a second frame 601. There is no gap between the second frame 601 and the main ruler 1. The second frame 601 is slidably connected to the main ruler 1 and can move laterally along the main ruler 1. Since there is no gap, the second frame 601 will not wobble when moving laterally. The second frame 601 is provided with a third locking part 604 for locking the movable measuring claw auxiliary ruler 6 and the main ruler 1. The movable measuring claw auxiliary ruler 6 is located between the positioning ruler frame 3 and the movable support part 2 at the right end. The movable measuring claw auxiliary ruler 6 is also provided with a measuring head 7. The measuring head 7 on the movable measuring claw auxiliary ruler 6 is correspondingly arranged with the measuring head 7 on the fixed measuring claw 5 for jointly inserting into the opposite sides of the noise reduction groove and measuring the top diameter of the noise reduction groove.

[0058] The tension spring 8 is connected between the movable measuring claw auxiliary ruler 6 and the positioning ruler frame 3.

[0059] The fixed measuring claw 5 and the main scale 1 are integrated into one structure. The measuring head 7 is provided at the left end of the bottom of the fixed measuring claw 5. The measuring head 7 is a cylindrical measuring head made of alloy material.

[0060] Preferably, the probe 7 is provided at the right end of the bottom of the movable measuring claw. The fixed measuring claw 5 includes a first inclined portion 501 and a first lateral extension portion 502, which are integral structures. The bottom of the first inclined portion 501 is inclined to the left, and the first lateral extension portion 502 is provided on the left side of the bottom of the first inclined portion 501. The left end face of the first lateral extension portion 502 is provided with a probe 7 mounting hole for mounting the probe 7. The movable measuring claw auxiliary ruler 6 includes a second inclined portion 602, a second lateral extension portion 603, and a second frame 601. The top of the second inclined portion 602 is fixedly connected to the second frame 601. The second inclined portion 602 and the second lateral extension portion 603 are integral structures. The bottom of the second inclined portion 602 is inclined to the right, and the second lateral extension portion 603 is provided on the right side of the bottom of the second inclined portion 602. The right end face of the second lateral extension portion 603 is provided with a probe 7 mounting hole for mounting the probe 7. The fixed measuring claw 5 on the left and the movable measuring claw auxiliary ruler 6 on the right form a figure-eight structure.

[0061] Preferably, the diameter of the probe 7 is designed to be 12mm, and one end of the probe 7 is a narrow diameter part and the other end is a tapered part. The narrow diameter part is used to insert into the mounting hole of the probe 7.

[0062] The fine-diameter part of the probe 7 can be made of a screw, and the mounting hole of the probe 7 is designed accordingly to be a threaded hole that matches the screw. The probe 7 is installed in the mounting hole of the probe 7 by the screw thread.

[0063] The support rod 201 includes:

[0064] The top of the rod 2011 is fixedly connected to the first frame 202, and the bottom of the rod 2011 is provided with an upward lifting groove.

[0065] The lifting rod 2012 is located in the lifting groove and can move up and down along the lifting groove. The lifting rod 2012 is provided with scale lines from top to bottom. The scale lines are longitudinal scale lines 2015, which are used to observe the adjustment height of the lifting rod 2012.

[0066] A support plate 2013 is disposed at the bottom of the lifting rod 2012. The bottom surface of the support plate 2013 is a support positioning surface, which is used to support the graphite cast steel urban rail wheel rim surface.

[0067] The fourth locking part 2014 is provided on the rod body 2011. The fourth locking part 2014 is used to lock the lifting rod 2012 and the rod body 2011.

[0068] In this embodiment, the fourth locking nut can be a locking bolt. A bolt hole matching the fourth locking part 2014 is provided on the outer side of the rod body 2011, and the bolt hole communicates with the lifting groove. The fourth locking part 2014 is threaded into the bolt hole. A longitudinal observation groove for observing the scale lines on the lifting rod 2012 is provided on the side of the rod body 2011. When the lifting rod 2012 is raised to a suitable position, the lifting rod 2012 can be locked and fixed by tightening the fourth locking part 2014 and pressing it against the lifting rod 2012. At this time, the lifting height of the lifting rod 2012 can also be measured by observing the reading of the scale lines on the lifting rod 2012.

[0069] In this embodiment, the first locking part 203, the second locking part 4, and the third locking part 604 are all made of locking bolts. Bolt holes matching the first locking part 203 are opened on the outside of the first frame 202, bolt holes matching the second locking part 4 are opened on the outside of the positioning frame 3, and bolt holes matching the third locking part 604 are opened on the second frame 601.

[0070] Before measuring the top diameter of the noise reduction groove on the wheel, first adjust the distance between the two movable support parts 2 of the noise reduction groove top diameter measuring ruler and the center of the measuring head 7 to 23mm and fix them. Then, place the measuring head 7 of the fixed measuring claw 5 into the noise reduction groove of the wheel. The support positioning surfaces of the two movable support parts 2 are placed on the rim surface of the graphite cast steel urban rail wheel. The measuring head 7 of the movable measuring claw auxiliary ruler 6 is moved to the radial noise reduction groove of the wheel opposite to the measuring head 7 of the fixed measuring claw 5. The two measuring heads 7 are set opposite each other. Move the adjustable positioning ruler frame 3 to compress the tension spring 8 appropriately and then tighten the fixed positioning ruler frame 3 through the second locking part 4. With the measuring head 7 of the fixed measuring claw 5 and the support positioning surface of the movable support part 2 on the left as the fixed end, move the support positioning surface of the movable support part 2 on the right end along the rim surface of the wheel. This will enable accurate detection of the top diameter of the inner and outer noise reduction grooves (i.e., the inner and outer noise reduction grooves of the wheel) of the graphite cast steel urban rail wheel. Figure 5 This is a schematic diagram showing the top diameter of the noise reduction groove on the inner side of the wheel. Figure 6 (This is a schematic diagram of measuring the top diameter of the noise reduction groove on the outer side of the wheel).

[0071] The steps for measuring the top diameter of the noise reduction tank are as follows:

[0072] 1. Adjust the support distance: Loosen the fourth locking part 2014 on the movable support part 2, move the height of the lifting rod 2012 up and down and observe the reading of the scale line on the lifting rod 2012, adjust the distance between the support positioning surface of the two movable support parts 2 and the center of the probe 7 on the left to 23mm, and tighten the fourth locking part 2014 to lock and fix the lifting rod 2012.

[0073] 2. Place the measuring ruler: Place the measuring head 7 of the fixed measuring claw 5 into the wheel noise reduction groove, and at the same time place the support positioning surfaces of the two movable support parts 2 on the wheel rim surface.

[0074] 3. Move the movable jaw scale 6: Move the measuring head 7 on the movable jaw scale 6 into the radial noise reduction groove of the wheel;

[0075] 4. Tighten and read the value: After moderately compressing the tension spring 8 by moving the positioning ruler frame 3, the positioning ruler frame 3 is locked in place by the second locking part 4 to fix its position. Then, one of the movable support parts 2 is moved along the wheel rim surface to find the position of the maximum reading, thereby achieving accurate measurement.

[0076] This measuring ruler can be used to measure the top diameter of both the inner and outer noise reduction grooves on a wheel. Due to its ingenious design, it can adapt to noise reduction grooves of different diameters while ensuring high accuracy in the measurement results. This technology is mainly applied in the production and quality inspection of graphite-type cast steel urban rail wheels to ensure that the top diameter of the noise reduction groove meets design requirements, thereby improving the noise reduction performance and overall quality of the wheel.

[0077] Since this measuring ruler is designed for use with graphite-type cast steel urban rail wheels and is a specialized ruler for measuring the top diameter of the wheel noise reduction groove, preferably, the measuring range of this measuring ruler is designed to be 700~750mm, the scale division value is 0.02mm, and the indication error of the measuring ruler is ≤±0.12mm (refer to...). Figure 1 and Figure 2 ).

[0078] Advantages of this noise-reducing groove top diameter measuring ruler:

[0079] 1. High efficiency and convenience: The top diameter of the inner and outer noise reduction grooves can be measured with just one ruler, without the need to change tools.

[0080] 2. High precision: The consistency of the measuring force is controlled by a tension spring, avoiding errors caused by human operation.

[0081] 3. High versatility: Applicable to the measurement needs of noise reduction tanks of different sizes.

[0082] The beneficial effects of the technical solution of this utility model are:

[0083] This application provides a graphite-type cast steel urban rail vehicle wheel noise reduction groove top diameter measuring ruler. When measuring the top diameter of the noise reduction groove, the measuring head 7 of the fixed measuring claw 5 is first placed into the wheel noise reduction groove, while the bottoms of the two movable support parts 2 are placed on the wheel rim surface. Then, the measuring head 7 of the movable measuring claw auxiliary ruler 6 is moved into the radial noise reduction groove of the wheel. When both measuring heads 7 simultaneously press against the inner wall of the noise reduction groove, a reading can be taken and recorded on the scale line of the main ruler 1, achieving accurate measurement of the noise reduction groove top diameter. This measuring ruler can be used to measure the top diameter of both the inner and outer noise reduction grooves of the wheel, without requiring tool changes for measuring the inner and outer grooves. Due to its ingenious design, it can adapt to noise reduction grooves of different diameters while ensuring high accuracy of the measurement results.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

[0085] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A graphite-type cast steel urban rail vehicle wheel noise-reducing groove top diameter measuring ruler, characterized in that, include: Main scale (1), with scale lines provided along its length direction; The movable support part (2) is provided in two parts and is respectively provided at both ends of the main scale (1). The movable support part (2) includes a support rod (201) and a first frame (202) connected to each other. The first frame (202) is sleeved on the outside of the main scale (1) and can move along the main scale (1). A first locking part (203) is provided on the first frame (202). The locking part is used to lock and fix the main scale (1) to the first frame (202). The bottom of the support rod (201) is used to support the surface of the graphite cast steel urban rail wheel rim. Positioning frame (3), the positioning frame (3) is sleeved on the outside of the main ruler (1) and can move along the main ruler (1), the positioning frame (3) is provided with a second locking part (4) for locking and fixing the positioning frame (3) and the main ruler (1); Fixed measuring claw (5), the fixed measuring claw (5) is fixedly connected to the main scale (1), and the fixed measuring claw (5) is located between the movable support part (2) and the positioning scale frame (3) at the left end. The fixed measuring claw (5) is provided with a measuring head (7), which is used to insert into the noise reduction groove of the wheel and press against the inner wall of the noise reduction groove for positioning. The movable measuring claw auxiliary ruler (6) is mounted on the main ruler (1) via a second frame (601). The second frame (601) is provided with a third locking part (604) for locking the movable measuring claw auxiliary ruler (6) and the main ruler (1). The movable measuring claw auxiliary ruler (6) is located between the positioning ruler frame (3) and the movable support part (2) at the right end. The movable measuring claw auxiliary ruler (6) is also provided with a measuring head (7). The measuring head (7) on the movable measuring claw auxiliary ruler (6) is correspondingly set with the measuring head (7) on the fixed measuring claw (5) for jointly inserting into the opposite sides of the noise reduction groove and measuring the top diameter of the noise reduction groove.

2. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 1, characterized in that, A tension spring (8) is connected between the movable measuring claw auxiliary ruler (6) and the positioning ruler frame (3).

3. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 1, characterized in that, The fixed measuring claw (5) and the main scale (1) are an integral structure, and the measuring head (7) is provided at the left end of the bottom of the fixed measuring claw (5).

4. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 3, characterized in that, The probe (7) is located at the right end of the bottom of the movable measuring claw (6), and the fixed measuring claw (5) and the movable measuring claw form a figure-eight structure.

5. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 1, characterized in that, The support rod (201) includes: The top of the rod (2011) is fixedly connected to the first frame (202), and the bottom of the rod (2011) is provided with an upward lifting groove; The lifting rod (2012) is located in the lifting groove and can move up and down along the lifting groove; A support plate (2013) is disposed at the bottom of the lifting rod (2012). The bottom surface of the support plate (2013) is a support positioning surface, which is used to support the graphite cast steel urban rail wheel rim. The fourth locking part (2014) is provided on the rod body (2011). The fourth locking part (2014) is used to lock the lifting rod (2012) and the rod body (2011).

6. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 5, characterized in that, The lifting rod (2012) has scale lines from top to bottom.

7. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 6, characterized in that, The side of the rod (2011) is provided with a longitudinal observation groove for observing the scale lines on the lifting rod (2012).

8. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 5, characterized in that, The fourth locking part (2014) is a locking bolt, and the fourth locking part (2014) is located at the lower part of the rod (2011).

9. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 1, characterized in that, The probe (7) is a cylindrical probe (7) made of metal.

10. The graphite-type cast steel urban rail wheel noise reduction groove top diameter measuring ruler according to claim 1, characterized in that, The first locking part (203), the second locking part (4), and the third locking part (604) all use locking bolts.

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