Brake disc deformation measuring device and method

Abstract

The invention discloses a brake disc deformation measuring device and method.The brake disc deformation measuring device comprises a guide rail, a dial indicator is arranged on the guide rail in a sliding mode and comprises a measuring rod, a measuring head is arranged at the bottom of the measuring rod, and the measuring rod and the measuring head are located on one side of the guide rail. The bottom end face of the guide rail is placed on the brake surface of the brake disc, and the measuring head is always in contact with the brake surface. Compared with the mode that an operator uses a three-coordinate measuring instrument or a measuring tool for measurement, the brake disc deformation measuring device has the advantages that the brake disc deformation measured by the brake disc deformation measuring device is more accurate, the measuring error is reduced, the reliability of the brake disc during braking is improved, and the personal safety of a vehicle user is effectively guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake disc deformation measurement, and in particular relates to a brake disc deformation measurement device and method. Background Art

[0002] Brake disc deformation refers to the amount of axial, radial, and circumferential deformation of the brake disc during operation. The brake disc is subjected to significant pressure from the caliper during high-speed braking. Excessive deformation can affect the friction efficiency of the brake pads, hindering the transmission and distribution of braking force, and thus reducing braking effectiveness.

[0003] Brake disc deformation is also crucial to vehicle safety. Excessive brake disc deformation can cause wear on the brake caliper at best, or even lead to brake failure, compromising vehicle safety.

[0004] In existing technology, brake disc deformation can be measured using a three-dimensional coordinate measuring machine or measuring tool. Before three-dimensional testing, the brake must be removed and the brake disc must be disassembled and cleaned. However, the deformation of the brake disc must be measured during various test cycles, making repeated disassembly testing impractical. During the measurement process, the testing tool must be fixed to the braking surface of the brake disc to measure the deformation values ​​on both the inner and outer ends of the braking surface, which undoubtedly leads to significant human error. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a brake disc deformation measuring device. Compared with the method of measuring by an operator using a three-coordinate measuring instrument or a measuring tool, the brake disc deformation measuring device of the present invention measures the brake disc deformation more accurately, reduces measurement errors, improves the reliability of the brake disc during braking, and effectively ensures the personal safety of vehicle users.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A brake disc deformation measuring device comprises a guide rail, a dial indicator is slidably provided on the guide rail, the dial indicator comprises a measuring rod, a measuring head is provided at the bottom of the measuring rod, the measuring rod and the measuring head are located on one side of the guide rail, when measuring the deformation of the brake disc, the bottom end surface of the guide rail is placed on the braking surface of the brake disc, and the measuring head is always in contact with the braking surface.

[0008] Furthermore, the guide rail is provided with a guide rail groove, the notch of the guide rail groove extends to the upper end surface of the guide rail, and a guide rod A and a guide rod B are respectively provided on the two side walls of the guide rail groove, and the dial indicator is slidably set on the guide rod A and the guide rod B.

[0009] Furthermore, the dial indicator is slidably arranged on the guide rod A and the guide rod B through a slider.

[0010] Furthermore, a slide groove A and a slide groove B are respectively provided on both sides of the slider, the guide rod A is inserted into the slide groove A, and the guide rod B is inserted into the slide groove B.

[0011] Furthermore, the dial indicator is detachably fixedly connected to the slider via a connecting plate.

[0012] Furthermore, an opening is provided on the connecting plate, the dial indicator is inserted into the opening, and the opening is locked using a bolt.

[0013] Furthermore, a magnetic member is provided at the bottom of the guide rail groove.

[0014] Furthermore, the magnetic component is a magnet, and a plurality of the magnets are provided. Along the length direction of the guide rail, the plurality of magnets are spaced apart and arranged at the bottom of the guide rail groove.

[0015] Furthermore, a plurality of through holes are arranged at intervals on the bottom of the guide rail groove, and the magnets are arranged in the through holes.

[0016] Based on the same inventive concept, the second technical problem to be solved by the present invention is: to provide a method for measuring the deformation of a brake disc. Compared with the method in which an operator uses a three-coordinate measuring instrument or a measuring tool for measurement, the deformation of the brake disc measured by the brake disc deformation measuring device of the present invention is more accurate, reduces measurement errors, improves the reliability of the brake disc during braking, and effectively ensures the personal safety of vehicle users.

[0017] A method for measuring brake disc deformation, using the brake disc deformation measuring device described above, is described as follows:

[0018] S1. Select the dial indicator with a suitable range to ensure that the range of the dial indicator can measure the complete deformation;

[0019] S2. Install the connecting plate on the slider using the bolts, install the dial indicator in the opening of the connecting plate, and lock it with screws;

[0020] S3. Place the guide rail on a horizontal platform, adjust the range of the dial indicator to mid-range and return to zero;

[0021] S4, installing the brake disc on the rotating mechanism through the mounting hole on the brake disc, and the brake disc is arranged vertically;

[0022] S5. Select point A on the braking surface for measurement, where point A is 10 mm directly below the lowermost end of the inner wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point A, and measure a first value X.

[0023] Select point B on the braking surface for measurement, where point B is 10 mm horizontally inward from the leftmost end of the outer wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point B, and measure a second value M.

[0024] Select point C on the braking surface for measurement, where point C is 10 mm horizontally inward from the rightmost end of the outer wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point C, and measure the third value m.

[0025] Substitute the three measured values ​​X, M, and m into the deformation calculation formula: deformation = X-(M+m) / 2;

[0026] S6, rotating the brake disc so that the brake disc rotates 120 degrees, and repeating step S5;

[0027] S7, continue rotating the brake disc in the same rotation direction until the brake disc rotates 120°, and repeat step S5;

[0028] S8. Take the maximum value of the deformation amounts in step S5, step S6, and step S7 as the deformation amount of the brake disc.

[0029] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] The brake disc deformation measuring device of the present invention includes a guide rail on which a dial indicator is slidably mounted. The dial indicator includes a measuring rod with a probe disposed at the bottom of the measuring rod. The measuring rod and probe are located on one side of the guide rail. When measuring the brake disc deformation, the bottom end surface of the guide rail is placed on the braking surface of the brake disc, and the probe is always in contact with the braking surface. Compared to measurements performed by an operator using a three-dimensional coordinate measuring instrument or measuring tool, the brake disc deformation measuring device of the present invention measures the brake disc deformation more accurately, reduces measurement errors, improves the reliability of the brake disc during braking, and effectively ensures the personal safety of vehicle users. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a perspective view of a brake disc deformation measuring device according to the present invention;

[0032] Figure 2 is a perspective view of the brake disc deformation measuring device of the present invention from another angle;

[0033] Figure 3 yes Figure 2 An enlarged perspective view in which the guide rail, guide rod A, and guide rod B are removed;

[0034] Figure 4 is a perspective view of the brake disc deformation measuring device (in use) of the present invention;

[0035] Figure 5 This is a perspective view of the brake disc deformation measuring device (in use) of the present invention from another angle;

[0036] In the figure, 1. magnet; 2. dial indicator; 21. measuring rod; 22. measuring head; 3. guide rail; 4. guide rod A; 5. guide rod B; 6. slider; 61. slide groove A; 62. slide groove B; 7. connecting plate; 71. opening; 8. bolt; 9. brake disc; 91. braking surface; 92. mounting hole; 93. inner wall; 94. outer wall; 10. screw. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and examples.

[0038] Combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,as well as Figure 5 As shown, a brake disc deformation measuring device includes a guide rail 3 on which a dial indicator 2 is slidably mounted. The dial indicator 2 includes a measuring rod 21, with a probe 22 disposed at the bottom of the measuring rod 21. The dial indicator 2 is a subcontracted component, and its structure, measurement principle, and measurement process are not described in detail here. The measuring rod 21 and probe 22 are located on one side of the guide rail 3. When measuring the deformation of the brake disc 9, the bottom end surface of the guide rail 3 rests on the braking surface 91 of the brake disc 9, and the probe 22 is in constant contact with the braking surface 91.

[0039] Preferably, a guide rail groove is provided on the guide rail 3, the notch of the guide rail groove extends to the upper end surface of the guide rail 3, and a guide rod A 4 and a guide rod B 5 are respectively provided on the two side walls of the guide rail groove, and the dial indicator 2 is slidably provided on the guide rod A 4 and the guide rod B 5.

[0040] Preferably, the dial indicator 2 is slidably arranged on the guide rod A 4 and the guide rod B 5 via a slider 6 .

[0041] Further preferably, a slide groove A 61 and a slide groove B 62 are respectively provided on both sides of the slider 6 , the guide rod A 4 is inserted into the slide groove A 61 , and the guide rod B 5 is inserted into the slide groove B 62 .

[0042] Preferably, the dial indicator 2 is detachably fixedly connected to the slider 6 via a connecting plate 7. The connecting plate 7 is detachably connected to the slider 6 via screws 10.

[0043] Further preferably, an opening 71 is provided on the connecting plate 7 , the measuring rod 21 of the dial indicator 2 is inserted into the opening 71 , and the opening 71 is locked using a bolt 8 .

[0044] Preferably, a magnetic member is provided at the bottom of the guide rail groove.

[0045] Further preferably, the magnetic member is a magnet 1 , and a plurality of magnets 1 are provided. Along the length direction of the guide rail 3 , the plurality of magnets 1 are spaced apart at the bottom of the guide rail groove.

[0046] Preferably, a plurality of through holes are arranged at intervals at the bottom of the guide rail groove, and the magnets 1 are arranged in the through holes.

[0047] The guide rail 3 is preferably made of metal.

[0048] Combine Figure 4 as well as Figure 5 As shown together, the method for measuring the deformation of the brake disc 9 using the brake disc deformation measuring device of the present invention is described in detail below:

[0049] S1. Select a dial indicator 2 with an appropriate range to ensure that the range of the dial indicator 2 can measure the complete deformation;

[0050] S2. Install the connecting plate 7 on the slider 6 with the bolts 8, install the measuring rod 21 of the dial indicator 2 into the opening 71 of the connecting plate 7, and lock it with the screws 10;

[0051] S3. Place the guide rail 3 on a horizontal platform (not shown in the figure), adjust the range of the dial indicator 2 to the middle range and return it to zero;

[0052] S4. Install the brake disc 9 on the rotating mechanism through the mounting hole 92 on the brake disc 9 (not shown in the figure, the rotating mechanism is a prior art. When testing the deformation of the braking surface of the brake disc, installing the brake disc on the rotating mechanism is also a prior art and will not be described in detail here). The brake disc 9 is arranged vertically.

[0053] S5. Select point A on the braking surface 91 for measurement. Point A is 10 mm below the lowermost end of the inner wall 93 of the brake disc 9. Place the bottom end surface of the guide rail 3 against the braking surface 91 of the brake disc 9 where the deformation is to be measured. Adjust the probe 22 of the dial indicator 2 so that it is always in contact with point A. Measure the first value X.

[0054] Select point B on the braking surface 91 for measurement. Point B is 10 mm horizontally inward from the leftmost end of the outer wall 94 of the brake disc 9. Adsorb the bottom end surface of the guide rail 3 onto the braking surface 91 of the brake disc 9 where the deformation is to be measured. Adjust the probe 22 of the dial indicator 2 so that it is always in contact with point B. Measure the second value M.

[0055] Select point C on the braking surface 91 for measurement. Point C is 10 mm horizontally inward from the rightmost end of the outer wall 94 of the brake disc 9. Adsorb the bottom end surface of the guide rail 3 onto the braking surface 91 of the brake disc 9 whose deformation is to be measured. Adjust the probe 22 of the dial indicator 2 so that it is always in contact with point C. Measure the third value m.

[0056] Substitute the three measured values ​​X, M, and m into the deformation calculation formula: deformation = X-(M+m) / 2;

[0057] S6, rotating the brake disc 9 so that the brake disc 9 rotates 120 degrees, and repeating step S5;

[0058] S7, continue to rotate the brake disc 9 in the same rotation direction until the brake disc 9 rotates 120°, and repeat step S5;

[0059] S8. Take the maximum value of the deformation amounts in step S5, step S6, and step S7 as the deformation amount of the brake disc.

[0060] The technical features named with serial numbers in this specification (such as guide rod A, guide rod B, slider, slide groove A, slide groove B, etc.) are only for distinguishing the various technical features and do not represent the positional relationship, installation sequence and working sequence between the various technical features.

[0061] In the description of this specification, it should be understood that the orientations or positional relationships described as “upper end face”, “lower end face”, “bottom of the groove”, “side wall”, “inner wall”, “outer wall”, “lowest end”, “directly below”, “horizontal direction”, “leftmost end”, “rightmost end”, “inward”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] Although specific embodiments of the present invention have been described above, those skilled in the art should understand that the embodiments described are only some of the embodiments of the present invention, rather than all of them, and are merely illustrative. The scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention and without any creative effort, and such changes and modifications shall fall within the scope of protection of the present invention.

Claims

1. A brake disc deformation measuring device, characterized in that: It includes a guide rail, on which a dial indicator is slidably arranged. The dial indicator includes a measuring rod, and a measuring head is arranged at the bottom of the measuring rod. The measuring rod and the measuring head are located on one side of the guide rail. When measuring the deformation of the brake disc, the bottom end surface of the guide rail is placed on the braking surface of the brake disc, and the measuring head is always in contact with the braking surface.

2. The brake disc deformation measuring device according to claim 1, characterized in that: The guide rail is provided with a guide rail groove, the notch of the guide rail groove extends to the upper end surface of the guide rail, and a guide rod A and a guide rod B are respectively provided on the two side walls of the guide rail groove, and the dial indicator is slidably set on the guide rod A and the guide rod B.

3. The brake disc deformation measuring device according to claim 2, characterized in that: The dial indicator is slidably arranged on the guide rod A and the guide rod B via a slider.

4. The brake disc deformation measuring device according to claim 3, wherein: A slide groove A and a slide groove B are respectively provided on both sides of the slider, the guide rod A is inserted into the slide groove A, and the guide rod B is inserted into the slide groove B.

5. The brake disc deformation measuring device according to claim 4, characterized in that: The dial indicator is detachably fixedly connected to the slider via a connecting plate.

6. The brake disc deformation measuring device according to claim 5, characterized in that: The connecting plate is provided with an opening, the dial indicator is inserted into the opening, and the opening is locked using a bolt.

7. The brake disc deformation measuring device according to claim 1, wherein: A magnetic piece is provided at the bottom of the guide rail groove.

8. The brake disc deformation measuring device according to claim 7, wherein: The magnetic member is a magnet, and a plurality of the magnets are provided. Along the length direction of the guide rail, the plurality of magnets are spaced apart and arranged at the bottom of the groove of the guide rail.

9. The brake disc deformation measuring device according to claim 8, characterized in that: The bottom of the guide rail groove is provided with a plurality of through holes at intervals, and the magnets are arranged in the through holes.

10. A method for measuring brake disc deformation, characterized in that: Using the brake disc deformation measuring device according to any one of claims 1 to 9, the measuring method is as follows: S1. Select the dial indicator with a suitable range to ensure that the range of the dial indicator can measure the complete deformation; S2. Install the connecting plate on the slider using the bolts, install the dial indicator in the opening of the connecting plate, and lock it with screws; S3. Place the guide rail on a horizontal platform, adjust the range of the dial indicator to mid-range and return to zero; S4, installing the brake disc on the rotating mechanism through the mounting hole on the brake disc, and the brake disc is arranged vertically; S5. Select point A on the braking surface for measurement, where point A is 10 mm directly below the lowermost end of the inner wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point A, and measure a first value X. Select point B on the braking surface for measurement, where point B is 10 mm horizontally inward from the leftmost end of the outer wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point B, and measure a second value M. Select point C on the braking surface for measurement, where point C is 10 mm horizontally inward from the rightmost end of the outer wall of the brake disc. Adsorb the bottom end surface of the guide rail onto the braking surface of the brake disc where the deformation is to be measured. Adjust the probe of the dial indicator so that it is always in contact with point C, and measure the third value m. Substitute the three measured values ​​X, M, and m into the deformation calculation formula: deformation = X-(M+m) / 2; S6, rotating the brake disc so that the brake disc rotates 120 degrees, and repeating step S5; S7, continue to rotate the brake disc in the same rotation direction until the brake disc rotates 120°, and repeat step S5; S8. Take the maximum value of the deformation amounts in step S5, step S6, and step S7 as the deformation amount of the brake disc.

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