An automatic brake disc change measurement device

Abstract

This invention discloses an automatic brake disc shape-changing measuring device, belonging to the field of brake disc measurement technology. It includes a frame, a workpiece positioning mechanism, a workpiece turning mechanism, and a workpiece measuring mechanism. The frame has a measuring position. The workpiece positioning mechanism includes a tapered sleeve and a positioning fixture. The tapered sleeve is used to position the center hole of the brake disc, and the positioning fixture is used to support the inner end face of the brake disc cap. The workpiece measuring mechanism includes a measuring sensor and a measuring drive mechanism. The frame also has a tooling magazine. It further includes a shape-changing adjustment mechanism for replacing the tapered sleeve and the positioning fixture, and for adjusting the probe position of the measuring sensor. This invention has a compact structure and is easy to operate. It realizes automatic positioning, automatic rotation, automatic measurement, and automatic shape changing of the brake disc, reducing the labor intensity of workers, greatly improving the measurement efficiency of brake discs, meeting the measurement needs of different types of brake discs, and ensuring the measurement quality of brake discs.

Description

Technical Field

[0001] This invention relates to an automatic brake disc change measurement device, belonging to the field of brake disc measurement technology. Background Technology

[0002] Brakes are components in a braking system used to generate braking force that impedes the movement or tendency of a vehicle. Based on the different rotating elements, they can be divided into two main categories: drum brakes and disc brakes. In a disc brake, the rotating element in the friction pair is a disc-shaped brake disc with its end face as the working surface. The friction elements clamp the brake disc from both sides to generate braking force.

[0003] Brake discs are a critical component related to vehicle safety performance. Therefore, after the brake discs are manufactured, they need to be measured, such as the end face runout and the difference in braking surface thickness. Furthermore, with the rapid development of the automotive industry and the increasing variety of car models, brake discs, as an important automotive accessory, are not only in high demand but also come in numerous specifications and models to meet the needs of various car styles.

[0004] Traditional brake disc measurement is manual. The brake disc is placed on a positioning fixture, and a dial indicator (such as a micrometer) is applied to the upper and lower surfaces of the disc. The brake disc is then manually rotated to measure surface runout, thickness variation, and other parameters. For various brake disc models, the positioning fixture needs to be changed, and the dial indicator position adjusted to ensure accurate measurement of the specified model. Because manual measurement is inefficient and labor-intensive, only random sampling is possible, making 100% inspection impossible. Furthermore, the quality of manual measurements is susceptible to human error, making it difficult to guarantee measurement accuracy.

[0005] With technological advancements, automatic brake disc measuring devices have gradually emerged. These devices primarily automate the brake disc measurement process, allowing the brake disc to be automatically measured via sensors after being placed on a positioning device. However, measuring different brake disc models still requires manual intervention, such as changing the positioning device. This brake disc changeover process significantly impacts measurement efficiency, and existing automatic brake disc measuring devices cannot meet the demands for automated brake disc changeover and measurement. To support automated brake disc production, reduce worker workload, and address the low efficiency issue of measuring various brake disc models, an automatic brake disc changeover and measurement device is urgently needed. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing an automatic brake disc replacement measurement device.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: An automatic brake disc changing measurement device includes a frame, a workpiece positioning mechanism for positioning the brake disc, a workpiece turning mechanism for driving the brake disc to rotate, and a workpiece measuring mechanism for measuring the brake disc. The frame is provided with a measuring position. The workpiece positioning mechanism includes a conical sleeve and a positioning fixture disposed at the measuring position. The conical sleeve is floating and is used to position the center hole of the brake disc. The positioning fixture has a cylindrical structure and is used to support the inner end face of the brake disc cap. The workpiece measuring mechanism includes a measuring sensor for measuring the end face of the brake disc and a measuring drive mechanism for driving the measuring sensor to move.

[0008] The frame is also equipped with a tooling library, which is used to store the cone sleeve to be replaced and the positioning jig;

[0009] It also includes a changeover adjustment mechanism disposed on the frame, which is used for changing the cone sleeve and positioning fixture, and for adjusting the probe position of the measuring sensor.

[0010] The beneficial effects of this invention are as follows: the tapered sleeve can guide and position the center hole of the brake disc; the floating tapered sleeve provides cushioning for the placement of the brake disc and ensures that the inner end face of the brake disc cap acts on the positioning fixture. The centering of the tapered sleeve and the support of the positioning fixture enable stable and accurate positioning of the brake disc workpiece; under the action of the measuring drive mechanism, the measuring sensor can move to the measuring position, and the probe of the measuring sensor can act on the measuring end face of the brake disc at the measuring position. The brake disc can rotate under the action of the workpiece turning mechanism, and the measuring sensor can measure the phase on the brake disc. The measurement is performed on the corresponding measuring end face. After the measurement is completed, the measuring drive mechanism actuates, and the measuring sensor leaves the brake disc, awaiting the measurement of the next brake disc. The tooling library stores various models of tapered sleeves and positioning fixtures. When a brake disc model needs to be changed, the tapered sleeve and positioning fixture on the original measuring position are removed using the changing adjustment mechanism according to the size of the corresponding brake disc model. Then, the corresponding model of tapered sleeve and positioning fixture from the tooling library is installed on the workpiece positioning mechanism at the measuring position. The changing adjustment mechanism can also adjust the probe position of the measuring sensor according to the model of the brake disc to be measured, so as to achieve accurate measurement of the changed brake disc. This automatic brake disc changing measurement equipment has a compact structure and is easy to operate. Through the workpiece positioning mechanism, workpiece turning mechanism, workpiece measuring mechanism, and changing adjustment mechanism, it realizes automatic positioning, automatic rotation, automatic measurement, and automatic changing of the brake disc, reducing the labor intensity of workers, greatly improving the measurement efficiency of brake discs, achieving 100% quality inspection of brake discs, meeting the measurement needs of different models of brake discs, and ensuring the measurement quality of brake discs.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the shape-changing adjustment mechanism includes a shape-changing pneumatic gripper and a three-axis slide for adjusting the position of the shape-changing pneumatic gripper. The three-axis slide is mounted on the frame, and the drive end of the three-axis slide is connected to the shape-changing pneumatic gripper. The shape-changing pneumatic gripper includes multiple shape-changing grippers. The inner side of the gripper can be used to clamp the cone sleeve, and the outer side of the gripper can be used to internally support the positioning fixture.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the three-axis slide table can meet the movement requirements in three-dimensional space, enabling the change gripper to move along the X, Y, and Z directions under the action of the three-axis slide table, greatly improving the gripping and adjustment capabilities of the cone sleeve and positioning fixture at different positions. The change gripper can both hold the cone sleeve and internally support the positioning fixture, realizing the rapid replacement of the cone sleeve and positioning fixture, thereby meeting the measurement needs of various models of brake discs and improving the versatility and adaptability of the equipment.

[0014] Furthermore, the measuring sensor includes a first measuring sensor acting on the upper braking surface of the brake disc, a second measuring sensor acting on the lower braking surface of the brake disc, and a third measuring sensor acting on the outer end face of the disc cap of the brake disc.

[0015] The changing gripper is provided with a height adjustment slot for adjusting the height of the first and second measuring sensors. The changing gripper is also provided with a horizontal movement adjustment slot for horizontally pushing the measuring sensor to adjust its horizontal position. The claw end face of the changing gripper can act on the third measuring sensor to adjust its height position.

[0016] The beneficial effects of adopting the above-mentioned further solution are that the first, second, and third measuring sensors act on different measuring end faces of the brake disc, enabling comprehensive acquisition of measurement data from each end face of the brake disc. The height adjustment slot on the change-of-flight gripper allows for flexible adjustment of the height positions of the first and second measuring sensors according to different brake disc models, ensuring that the probes of the first and second measuring sensors can act on the brake surface end face of the corresponding model of brake disc to acquire the corresponding measurement data. The lateral adjustment slot allows for horizontal lateral movement of the measuring sensors, adjusting their horizontal position to ensure accurate application of the measuring sensors to the measuring points on the measuring end face of the brake disc. The claw end face of the change-of-flight gripper can adjust the height position of the third measuring sensor, enabling its probe to act on the outer end face of the disc cap, meeting the measurement requirements of the outer end face of the disc cap for different models of brake discs.

[0017] Furthermore, the frame is provided with a first Z-guide rail and a second Z-guide rail, which are connected to the frame via an X-guide rail and a Y-guide rail.

[0018] The brackets for the first and second measuring sensors are connected to the first Z-axis guide rail via the first and second sliders, respectively; the bracket for the third measuring sensor is connected to the second Z-axis guide rail via the third slider.

[0019] The beneficial effect of adopting the above-mentioned further scheme is that the arrangement of the first Z-axis guide rail, the second Z-axis guide rail, the X-axis guide rail, and the Y-axis guide rail can meet the movement requirements of the measuring sensor in three-dimensional space, providing a stable and flexible foundation for the measuring sensor's movement. The supports of the first and second measuring sensors are connected to the first Z-axis guide rail via the first slider and the second slider, respectively, allowing the first and second measuring sensors to be adjusted in the Z-axis direction and locked after adjustment, thus meeting the measurement requirements of the braking surface of different types of brake discs. Similarly, the support of the third measuring sensor is connected to the second Z-axis guide rail via the third slider, and its position can be locked after the height of the third measuring sensor is adjusted to ensure the stability of the third measuring sensor's position, further enhancing the measurement stability and accuracy of the measuring sensor.

[0020] Furthermore, the brackets of the first and second measuring sensors are respectively provided with a first vertical adjustment plate and a second vertical adjustment plate adapted to the height adjustment slot, and the mounting plates of the first and second Z-guide rails are respectively provided with a first transverse shift block and a second transverse shift block adapted to the transverse adjustment slot.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the height adjustment slot on the change gripper can cooperate with the first vertical adjustment plate to adjust the height of the first measuring sensor under the action of the three-axis slide. The height adjustment slot on the change gripper can also cooperate with the second vertical adjustment plate to adjust the height of the second measuring sensor under the action of the three-axis slide. The height adjustment slot on the change gripper can be used to adjust the position of the first and second measuring sensors in the vertical direction to meet the measurement requirements of the braking surface of different models of brake discs in the height direction, thereby improving the flexibility of brake disc measurement. The lateral adjustment slot on the changing jaw can cooperate with the first lateral shifting block to adjust the horizontal lateral position of the first and second measuring sensors, ensuring that the probes of the first and second measuring sensors act on the upper and lower braking surfaces of the brake disc, respectively. The lateral adjustment slot on the changing jaw can cooperate with the second lateral shifting block to adjust the horizontal lateral position of the third measuring sensor, ensuring that the probe of the third measuring sensor acts on the outer end face of the brake disc cap, thereby meeting the horizontal measurement requirements of different models of brake discs.

[0022] Furthermore, a spring reset mechanism is provided between the bracket of the third measuring sensor and the mounting plate of the second Z-guide rail;

[0023] The spring reset mechanism includes a spring sleeve, a spring bracket, and a reset spring located inside the spring sleeve. The spring sleeve is mounted on the mounting plate of the second Z-guide rail. The upper end of the spring bracket is connected to the bracket of the third measuring sensor, and the lower end of the spring bracket is inserted into the spring sleeve. The reset spring is located between the bottom of the spring bracket and the spring sleeve.

[0024] The beneficial effect of adopting the above-mentioned further solution is that each time the brake disc is changed, the third measuring sensor can be reset to the zero position under the action of the spring reset mechanism, and then the height of the third measuring sensor can be adjusted according to the brake disc after the change, so as to ensure the accuracy of the height position adjustment of the third measuring sensor.

[0025] Furthermore, the tapered sleeve is connected to the tapered sleeve support shaft via an inner core cone. The tapered sleeve support shaft is provided with a shaft limiting platform. The inner core cone is slidably disposed on the tapered sleeve support shaft. A tapered sleeve spring is sleeved on the outer side of the tapered sleeve support shaft between the inner core cone and the shaft limiting platform. The workpiece positioning mechanism also includes a lifting adjustment mechanism for adjusting the compression of the tapered sleeve spring. The lifting adjustment mechanism includes a lifting servo cylinder, which is disposed on the machine frame. The piston rod of the lifting servo cylinder is connected to the tapered sleeve support shaft.

[0026] The beneficial effects of adopting the above-mentioned further solution are that when the center hole of the brake disc mates with the tapered sleeve, the tapered sleeve is compressed by the weight of the brake disc, causing it to move downwards. The support surface of the positioning fixture can support the inner end face of the brake disc cap. The inner core cone slides and cooperates with the tapered sleeve spring, achieving the purpose of the tapered sleeve floating in the axial direction. This not only provides elastic buffering, effectively avoiding rigid impacts during the placement of the brake disc workpiece, but also ensures accurate positioning of the brake disc by the tapered sleeve and the positioning fixture. The lifting and adjusting mechanism drives the tapered sleeve support shaft to move axially through a lifting servo cylinder to adjust the compression of the tapered sleeve spring and control the appropriate tapered sleeve elastic force. This ensures that the inner end face of the brake disc cap at the measurement position can be accurately supported on the corresponding positioning fixture, improving the flexibility of brake disc workpiece positioning and providing reliable assurance for the measurement of multiple brake disc models.

[0027] Furthermore, the positioning fixture is connected to the frame via a pneumatic chuck, the pneumatic chuck including multiple pneumatic jaws for positioning and supporting the positioning fixture.

[0028] The beneficial effect of adopting the above-mentioned further solution is that multiple pneumatic jaws are evenly distributed on the pneumatic chuck. For example, a three-jaw pneumatic chuck can be used to position and stably support the positioning fixture from three different directions, ensuring that the positioning fixture will not shift or shake during the measurement process. The radial position of the pneumatic jaws of the pneumatic chuck is adjustable. During changeover, the radial position of the pneumatic jaws can be adjusted according to the size of different positioning fixtures to achieve stable support for the positioning fixture and improve the efficiency of brake disc changeover measurement.

[0029] Furthermore, the workpiece turning mechanism includes a turning head mechanism, a rotation drive mechanism for adjusting the position of the turning head mechanism and driving the turning head mechanism to rotate, and a lifting drive mechanism for driving the turning head mechanism to move up and down. The turning head mechanism is connected to the lifting drive mechanism through the rotation drive mechanism.

[0030] The shifting head mechanism includes a shifting rod outer cylinder and a shifting rod floatingly disposed inside the shifting rod outer cylinder. The shifting head at the lower end of the shifting rod extends out of the shifting rod outer cylinder and can be inserted into the bolt hole of the brake disc, and can drive the brake disc to rotate under the action of the rotation drive mechanism.

[0031] The beneficial effect of adopting the above-mentioned further solution is that the rotation drive mechanism can adjust the position of the dial head according to the position of the pitch circle of the bolt hole of the brake disc, ensuring that the dial head corresponds to the pitch circle of the bolt hole of the brake disc to be measured. After the brake disc is positioned in the measurement position, the lifting drive mechanism is activated, driving the dial head mechanism to move towards the brake disc. The dial head acts on the outer end face of the brake disc cap. Under the rotation action of the rotation drive mechanism, the dial head travels along the trajectory of the virtual circle where the center points of all the bolt holes of the brake disc are located, until the dial head rotates to the position of a bolt hole. The dial head of the floating actuating rod is inserted into the bolt hole. The rotation drive mechanism is activated, and the brake disc can be rotated by the actuating rod, realizing the rotation drive of the brake disc workpiece and meeting the requirements of automatic rotation measurement of the brake disc.

[0032] Furthermore, the dial mechanism includes a lever spring disposed inside the outer cylinder of the lever, the lower end of which acts on the lever.

[0033] The beneficial effect of adopting the above-mentioned further solution is that the lower end of the lever spring inside the outer cylinder of the lever acts on the top of the lever. When the lever head is searching for the bolt hole of the brake disc but does not accurately align with the bolt hole, the lever spring can play a buffering and resetting role, allowing the lever to float within a certain range, avoiding damage to the surface of the lever head or brake disc due to hard contact, and preparing for the lever head to be accurately inserted into the bolt hole; the lifting drive mechanism can drive the rotating drive mechanism and the lever head mechanism to move up and down, thereby driving the lever head mechanism to the appropriate position, that is, the position where the lever head can be inserted and mated with the bolt hole of the brake disc. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the workpiece positioning mechanism of the present invention;

[0036] Figure 3 This is a front view schematic diagram of the workpiece positioning mechanism of the present invention;

[0037] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along the AA direction;

[0038] Figure 5 This is a schematic diagram of the workpiece turning mechanism of the present invention;

[0039] Figure 6 This is a schematic cross-sectional view of the actuating rod of the workpiece turning mechanism of the present invention.

[0040] Figure 7 This is a three-dimensional structural diagram of the workpiece turning mechanism of the present invention from a bottom view angle;

[0041] Figure 8 This is a schematic diagram of the workpiece measuring mechanism of the present invention;

[0042] Figure 9 This is a cross-sectional schematic diagram of the spring support structure of the workpiece measuring mechanism of the present invention;

[0043] Figure 10 This is a three-dimensional structural schematic diagram of the workpiece measuring mechanism of the present invention;

[0044] Figure 11 This is a schematic diagram of the structure of the type-changing adjustment mechanism of the present invention;

[0045] Figure 12 This is a structural schematic diagram of angle one of the changing gripper of the present invention;

[0046] Figure 13 This is a schematic diagram of the structure of angle two of the changing gripper of the present invention;

[0047] Figure 14 This is a schematic diagram of the positioning fixture and the lever in cooperation with the brake disc of the present invention;

[0048] Figure 15 This is a schematic diagram of the structure of the measuring sensor of the present invention acting on the brake disc to measure the state;

[0049] Figure 16 This is a schematic diagram of the brake disc structure;

[0050] Figure 17A three-dimensional structural diagram of the brake disc viewed from below;

[0051] Figure 18 This is a top view of the brake disc structure.

[0052] Figure 19 for Figure 18 A schematic diagram of the cross-sectional structure along the BB direction;

[0053] In the diagram, 100 is the frame; 101 is the measuring position; 102 is the tooling storage; 200 is the workpiece positioning mechanism; 201 is the tapered sleeve; 2011 is the tapered sleeve body; 2012 is the tapered sleeve connector; 202 is the positioning fixture; 203 is the tapered sleeve support shaft; 204 is the tapered sleeve spring; 205 is the inner core cone; 206 is the shaft limit platform; 207 is the lifting servo cylinder; 208 is the pneumatic chuck; 2081 is the pneumatic jaw; 209 is the spline sleeve; 210 is the mounting sleeve; and 300 is the workpiece turning mechanism. 301. Actuating lever; 302. Lever outer cylinder; 303. Lever spring; 304. Lever lifting drive cylinder; 305. Cylinder connecting plate; 306. Drive gripper; 307. Gripper moving motor; 308. Gripper rotating motor; 309. Vertical slide table; 310. Lifting slider; 311. Lifting slide rail; 400. Workpiece measuring mechanism; 401. First measuring sensor; 402. Second measuring sensor; 403. Third measuring sensor; 404. First Z-guide rail; 40 5. First slider; 406. First guide rail lock; 407. Second slider; 408. Second guide rail lock; 409. First vertical adjustment plate; 410. Second vertical adjustment plate; 411. Second Z-axis guide rail; 412. Third slider; 413. Third guide rail lock; 414. Second transverse sliding block; 415. Spring sleeve; 416. Spring bracket; 417. Return spring; 418. X-axis guide rail; 419. Horizontal plate; 420. Y-axis slider; 421. Y-axis guide rail; 42 2. First X-axis slider; 423. Second X-axis slider; 424. First transverse shift block; 425. Longitudinal movement cylinder; 500. Shape-changing adjustment mechanism; 501. Shape-changing gripper; 5011. Height adjustment slot; 5012. Transverse shift adjustment slot; 5013. Gripper end face; 502. Three-axis slide table; 600. Brake disc; 601. Upper brake surface; 602. Lower brake surface; 603. Outer end face of disc cap; 604. Inner end face of disc cap; 605. Center hole; 606. Bolt hole. Detailed Implementation

[0054] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0055] like Figures 1-19As shown, an automatic brake disc changing measuring device includes a frame 100, a workpiece positioning mechanism 200 for positioning a brake disc 600 mounted on the frame 100, a workpiece turning mechanism 300 for driving the brake disc 600 to rotate, and a workpiece measuring mechanism 400 for measuring the brake disc 600. The frame 100 has a measuring position 101. The workpiece positioning mechanism 200 includes a conical sleeve 201 and a positioning fixture 202 mounted on the measuring position 101. The conical sleeve 201 is floating and is used to position the center hole 605 of the brake disc 600. The positioning fixture 202 has a cylindrical structure and is used to support the inner end face 604 of the disc cap of the brake disc 600. The workpiece measuring mechanism 400 includes a measuring sensor for measuring the end face of the brake disc 600 and a measuring drive mechanism for driving the measuring sensor to move.

[0056] The frame 100 is also provided with a tooling storage 102, which is used to store the cone sleeve 201 to be replaced and the positioning jig 202;

[0057] It also includes a changeover adjustment mechanism 500 disposed on the frame 100, the changeover adjustment mechanism 500 being used for replacing the cone sleeve 201 and the positioning fixture 202, and for adjusting the probe position of the measuring sensor.

[0058] The type-changing adjustment mechanism 500 can automatically replace the corresponding cone sleeve 201 and positioning fixture 202, and adjust the probe position of the measuring sensor, thereby meeting the measurement requirements of different models of brake discs 600.

[0059] The shape-changing adjustment mechanism 500 includes a shape-changing pneumatic gripper and a three-axis slide 502 for adjusting the position of the shape-changing pneumatic gripper. The three-axis slide 502 is mounted on the frame 100, and its drive end is connected to the shape-changing pneumatic gripper. The shape-changing pneumatic gripper includes multiple shape-changing grippers 501. The inner side of the grippers 501 can be used to grip the cone sleeve 201, and the outer side of the grippers 501 can be used to internally support the positioning fixture 202. The three-axis slide 502 can meet the movement requirements in three-dimensional space, allowing the shape-changing grippers 501 to move along the X, Y, and Z directions under the action of the three-axis slide 502, greatly improving the gripping and adjustment capabilities of the cone sleeve 201 and the positioning fixture 202 at different positions. The change-up gripper 501 can both hold the cone sleeve 201 and internally support the positioning fixture 202, enabling quick replacement of the cone sleeve 201 and the positioning fixture 202. This allows it to meet the measurement needs of various models of brake discs 600 and improves the versatility and adaptability of the equipment.

[0060] The measuring sensors include a first measuring sensor 401 acting on the upper braking surface 601 of the brake disc 600, a second measuring sensor 402 acting on the lower braking surface 602 of the brake disc 600, and a third measuring sensor 403 acting on the outer end face 603 of the disc cap of the brake disc 600.

[0061] The changing gripper 501 is provided with a height adjustment slot 5011 for adjusting the height of the first measuring sensor 401 and the second measuring sensor 402. The changing gripper 501 is also provided with a lateral adjustment slot 5012 for horizontally pushing the measuring sensor to adjust its horizontal position. The claw end face 5013 of the changing gripper 501 can act on the third measuring sensor 403 and adjust its height. The first measuring sensor 401, the second measuring sensor 402, and the third measuring sensor 403 act on different measuring end faces of the brake disc 600, enabling comprehensive acquisition of measurement data from all end faces of the brake disc 600. The height adjustment slot 5011 on the change-change gripper 501 allows for flexible adjustment of the height positions of the first measuring sensor 401 and the second measuring sensor 402 according to different models of brake discs 600. This ensures that the probes of the first measuring sensor 401 and the second measuring sensor 402 can act on the end face of the braking surface of the corresponding model of brake disc 600 to obtain the corresponding measurement data. The horizontal adjustment slot 5012 can horizontally push the measuring sensor to adjust its horizontal position, ensuring that the measuring sensor can accurately act on the measurement point of the measuring end face of the brake disc 600. The claw end face 5013 of the change-change gripper 501 can adjust the height position of the third measuring sensor 403 so that the probe of the third measuring sensor 403 can act on the outer end face 603 of the disc cap, meeting the measurement requirements of the outer end face 603 of the disc cap of different models of brake discs 600.

[0062] The measurement sensor can be a displacement sensor, such as an LVDT displacement sensor.

[0063] The frame 100 is provided with a first Z-guide rail 404 and a second Z-guide rail 411, and the first Z-guide rail 404 and the second Z-guide rail 411 are connected to the frame 100 through an X-guide rail 418 and a Y-guide rail 421.

[0064] The brackets of the first measuring sensor 401 and the second measuring sensor 402 are connected to the first Z-axis guide rail 404 via the first slider 405 and the second slider 407, respectively; the bracket of the third measuring sensor 403 is connected to the second Z-axis guide rail 411 via the third slider 412. The arrangement of the first Z-axis guide rail 404, the second Z-axis guide rail 411, the X-axis guide rail 418, and the Y-axis guide rail 421 can meet the movement requirements of the measuring sensors in three-dimensional space, providing a stable and flexible foundation for their movement. The brackets of the first measuring sensor 401 and the second measuring sensor 402 are connected to the first Z-axis guide rail 404 via the first slider 405 and the second slider 407, respectively, allowing the first measuring sensor 401 and the second measuring sensor 402 to be adjusted in the Z-axis direction and locked after adjustment, thus meeting the measurement requirements of the braking surface of different models of brake discs 600. Similarly, the bracket of the third measuring sensor 403 is connected to the second Z-guide rail 411 via the third slider 412. After the height of the third measuring sensor 403 is adjusted to the correct position, its position can be locked to ensure the stability of the position of the third measuring sensor 403, thereby further enhancing the measurement stability and accuracy of the measuring sensor.

[0065] Once the position is adjusted and locked, a guide rail lock can be used for locking.

[0066] A first guide rail lock 406 is provided between the bracket of the first measuring sensor 401 and the first Z-guide rail 404; a second guide rail lock 408 is provided between the bracket of the second measuring sensor 402 and the first Z-guide rail 404; and a third guide rail lock 413 is provided between the bracket of the third measuring sensor 403 and the second Z-guide rail 411. The first guide rail lock 406 can lock the first measuring sensor 401 in position, the second guide rail lock 408 can lock the second measuring sensor 402 in position, and the third guide rail lock 413 can lock the third measuring sensor 403 in position, ensuring that the positions of the first measuring sensor 401, the second measuring sensor 402, and the third measuring sensor 403 are locked after their heights are adjusted to the correct positions, thus ensuring the stability of the position of the measuring sensors during the measurement process and avoiding measurement errors caused by external forces.

[0067] After the mounting plates of the first Z-guide rail 404 and the second Z-guide rail 411 are adjusted to their positions along the X-guide rail 418 in the X direction, they can also be locked by guide rail locks. For example, a guide rail lock is provided between the mounting plate of the first Z-guide rail 404 and the X-guide rail 418, and a guide rail lock is provided between the mounting plate of the second Z-guide rail 411 and the X-guide rail 418.

[0068] The brackets of the first measuring sensor 401 and the second measuring sensor 402 are respectively provided with a first vertical adjustment plate 409 and a second vertical adjustment plate 410 adapted to the height adjustment slot 5011. The mounting plates of the first Z-guide rail 404 and the second Z-guide rail 411 are respectively provided with a first transverse shift block 424 and a second transverse shift block 414 adapted to the transverse shift adjustment slot 5012. The height adjustment slot 5011 on the change gripper 501 can cooperate with the first vertical adjustment plate 409 to adjust the height of the first measuring sensor 401 under the action of the three-axis slide table 502. The height adjustment slot 5011 on the change gripper 501 can also cooperate with the second vertical adjustment plate 410 to adjust the height of the second measuring sensor 402 under the action of the three-axis slide table 502. The height adjustment slot 5011 on the change gripper 501 can be used to adjust the position of the first measuring sensor 401 and the second measuring sensor 402 in the vertical direction to meet the measurement requirements of the braking surface of different models of brake discs 600 in the height direction, thereby improving the flexibility of brake disc 600 measurement. The lateral adjustment slot 5012 on the changing gripper 501 can cooperate with the first lateral shifting block 424 to adjust the horizontal position of the first measuring sensor 401 and the second measuring sensor 402, ensuring that the probes of the first measuring sensor 401 and the second measuring sensor 402 act on the upper braking surface 601 and the lower braking surface 602 of the brake disc 600, respectively. The lateral adjustment slot 5012 on the changing gripper 501 can cooperate with the second lateral shifting block 414 to adjust the horizontal position of the third measuring sensor 403, ensuring that the probe of the third measuring sensor 403 acts on the outer end face 603 of the disc cap of the brake disc 600, thereby meeting the horizontal measurement requirements of different models of brake discs 600.

[0069] The height of the claw end face 5013 of the changing gripper 501 is adjusted by the bracket acting on the third measuring sensor 403.

[0070] A spring reset mechanism is also provided between the bracket of the third measuring sensor 403 and the mounting plate of the second Z-guide rail 411.

[0071] The spring reset mechanism includes a spring sleeve 415, a spring bracket 416, and a reset spring 417 located within the spring sleeve 415. The spring sleeve 415 is mounted on the mounting plate of the second Z-guide rail 411. The upper end of the spring bracket 416 is connected to the bracket of the third measuring sensor 403, and the lower end of the spring bracket 416 is inserted into the spring sleeve 415. The reset spring 417 is located between the bottom of the spring bracket 416 and the spring sleeve 415. Each time the brake disc 600 is changed, the third measuring sensor 403 can be reset to the zero position, such as the highest point position of the third measuring sensor 403, under the action of the spring reset mechanism. Then, the height of the third measuring sensor 403 is adjusted according to the changed brake disc 600 to ensure the accuracy of the height adjustment of the third measuring sensor 403.

[0072] The measurement drive mechanism includes a longitudinal moving cylinder 425, which is mounted on the frame 100. The longitudinal moving cylinder 425 is used to drive the measurement sensor to move. Under the action of the longitudinal moving cylinder 425, the measurement sensor can move longitudinally and reciprocate between the measurement position 101 and the non-measurement position, thereby realizing the measurement of the measurement end face of the brake disc 600 at the measurement position 101.

[0073] The frame 100 is provided with a Y-axis guide rail 421, and an X-axis guide rail 418 is disposed on a transverse plate 419. The transverse plate 419 is connected to the Y-axis guide rail 421 via a Y-axis slider 420. A longitudinal moving cylinder 425 can drive the transverse plate 419 to move along the Y-axis guide rail 421. The transverse plate 419 is connected to the Y-axis slider 420 via a longitudinal connecting plate, and the piston rod of the longitudinal moving cylinder 425 can be connected to the longitudinal connecting plate.

[0074] The mounting plate of the first Z-axis guide rail 404 is connected to the X-axis guide rail 418 via the first X-axis slider 422, and the mounting plate of the second Z-axis guide rail 411 is connected to the X-axis guide rail 418 via the second X-axis slider 423.

[0075] The tapered sleeve 201 is connected to the tapered sleeve support shaft 203 via the inner core cone 205. The tapered sleeve support shaft 203 is provided with a shaft limiting platform 206. The inner core cone 205 is slidably disposed on the tapered sleeve support shaft 203. A tapered sleeve spring 204 is sleeved on the outer side of the tapered sleeve support shaft 203 between the inner core cone 205 and the shaft limiting platform 206. The workpiece positioning mechanism 200 also includes a lifting adjustment mechanism for adjusting the compression of the tapered sleeve spring 204. The lifting adjustment mechanism includes a lifting servo cylinder 207, which is disposed on the frame 100. The piston rod of the lifting servo cylinder 207 is connected to the tapered sleeve support shaft 203. When the center hole 605 of the brake disc 600 engages with the tapered sleeve 201, the tapered sleeve 201 is compressed by the weight of the brake disc 600. The supporting surface of the positioning fixture 202 can support the inner end face 604 of the disc cap of the brake disc 600. The inner core cone 205 is slidably set and engages with the tapered sleeve spring 204, realizing the floating purpose of the tapered sleeve 201 in the axial direction. This not only provides elastic buffering and effectively avoids rigid impact during the placement of the brake disc 600, but also satisfies the accurate positioning of the brake disc 600 by the tapered sleeve 201 and the positioning fixture 202. The lifting and adjusting mechanism drives the tapered sleeve support shaft 203 to move axially via the lifting servo electric cylinder 207, thereby adjusting the compression of the tapered sleeve spring 204 and controlling the appropriate elastic force of the tapered sleeve 201. This ensures that the inner end face 604 of the brake disc 600 on the measuring position 101 can be accurately supported on the corresponding positioning fixture 202, improving the flexibility of brake disc 600 workpiece positioning and providing a reliable guarantee for the measurement of multiple models of brake disc 600.

[0076] The tapered sleeve 201 and the inner core cone 205 are in tapered surface fit. The self-locking property of the tapered surface ensures the stable positioning of the inner core cone 205 on the tapered sleeve 201. At the same time, the tapered surface fit also facilitates the replacement of the tapered sleeve 201.

[0077] The positioning jig 202 is connected to the frame 100 via a pneumatic chuck 208. The pneumatic chuck 208 includes multiple pneumatic jaws 2081 for positioning and supporting the positioning jig 202. The multiple pneumatic jaws 2081 are evenly distributed on the pneumatic chuck 208. For example, a three-jaw pneumatic chuck 208 can be used to position and stably support the positioning jig 202 from three different directions, ensuring that the positioning jig 202 does not shift or shake during measurement. The radial position of the pneumatic jaws 2081 of the pneumatic chuck 208 is adjustable. During model changeover, the radial position of the pneumatic jaws 2081 can be adjusted according to the size of different positioning jigs 202 to achieve stable support for the positioning jig 202 and improve the efficiency of brake disc 600 model changeover measurement.

[0078] The tapered sleeve 201 includes a tapered sleeve connector 2012 and a tapered sleeve body 2011 sleeved on the tapered sleeve connector 2012. The tapered sleeve connector 2012 and the inner core cone 205 have a tapered surface fit. The top of the tapered sleeve support shaft 203 is provided with a shaft top cover, which is used to limit the inner core cone 205. The tapered sleeve body 2011 can be connected to the tapered sleeve connector 2012 by fasteners. The tapered sleeve 201 is an integral structure that can be replaced according to different models of brake discs 600. The inner wall of the tapered sleeve connector 2012 has a tapered surface structure that matches the outer surface of the inner core cone 205. The tapered surface fit of the two utilizes the self-locking characteristic of the tapered surface to ensure a tight fit between the two, ensuring the positioning of the brake disc 600 workpiece. In addition, the tapered surface fit facilitates the replacement of the tapered sleeve 201.

[0079] The tapered sleeve support shaft 203 includes a tapered sleeve connecting shaft and a splined shaft connected to the tapered sleeve connecting shaft. The frame 100 is provided with a mounting sleeve 210, and a splined sleeve 209 that mates with the splined shaft is provided within the mounting sleeve 210. The mating of the splined shaft and the splined sleeve 209 enables the transmission and stable connection of the tapered sleeve support shaft 203, preventing rotation during the positioning of the brake disc 600, thus ensuring the accuracy and reliability of the brake disc 600 positioning. Furthermore, it facilitates individual maintenance of the tapered sleeve connecting shaft or the splined shaft, reducing maintenance costs.

[0080] The workpiece turning mechanism 300 includes a turning head mechanism, a rotation drive mechanism for adjusting the position of the turning head mechanism and driving the turning head mechanism to rotate, and a lifting drive mechanism for driving the turning head mechanism to move up and down. The turning head mechanism is connected to the lifting drive mechanism through the rotation drive mechanism.

[0081] The dial mechanism includes a dial outer cylinder 302 and a dial rod 301 floatingly disposed within the dial outer cylinder 302. The dial head at the lower end of the dial rod 301 extends out of the dial outer cylinder 302 and can be inserted into the bolt hole 606 of the brake disc 600. Under the action of the rotation drive mechanism, it can drive the brake disc 600 to rotate. The rotation drive mechanism can adjust the position of the dial head according to the pitch circle of the bolt hole 606 of the brake disc 600 to ensure that the dial head corresponds to the pitch circle of the bolt hole 606 of the brake disc 600 to be measured. After the brake disc 600 is positioned at the measuring position 101, the lifting drive mechanism is activated, driving the dial mechanism to move towards the brake disc 600. The dial acts on the outer end face 603 of the disc cap of the brake disc 600. Under the rotation of the rotation drive mechanism, the dial moves along the circular trajectory of the virtual circle where the center points of all the bolt holes 606 of the brake disc 600 are located, until the dial rotates to the position of a bolt hole 606. The dial of the floating lever 301 is inserted into the bolt hole 606. When the rotation drive mechanism is activated, the brake disc 600 can be rotated by the lever 301, realizing the rotation drive of the brake disc 600 workpiece and meeting the requirements of automatic rotation measurement of the brake disc 600.

[0082] The dial mechanism includes a dial spring 303 disposed inside the outer cylinder 302 of the dial, and the lower end of the dial spring 303 acts on the dial rod 301.

[0083] The lifting drive mechanism includes a lever lifting drive cylinder 304, which is mounted on the frame 100. The piston rod of the lever lifting drive cylinder 304 is connected to the rotary drive mechanism via a cylinder connecting plate 305. The lower end of the lever spring 303 inside the lever outer cylinder 302 acts on the top of the lever 301. When the lever head is searching for the bolt hole 606 of the brake disc 600 but is not accurately aligned with the bolt hole 606, the lever spring 303 can buffer and reset, allowing the lever 301 to float within a certain range. This avoids damage to the lever head or the surface of the brake disc 600 due to hard contact, preparing the lever head to be accurately inserted into the bolt hole 606. The action of the lever lifting drive cylinder 304 can drive the rotary drive mechanism and the lever head mechanism to move up and down, thereby driving the lever head mechanism to the appropriate position, that is, the position where the lever head can be inserted and fitted into the bolt hole 606 of the brake disc 600.

[0084] The rotation drive mechanism is connected to the cylinder connecting plate 305 via a vertical slide 309.

[0085] A guide mechanism is provided between the vertical slide 309 and the frame 100. The guide mechanism includes a lifting slide rail 311 and a lifting slider 310 adapted to the lifting slide rail 311. The lifting slide rail 311 is mounted on the frame 100, and the lifting slider 310 is mounted on the vertical slide 309. This ensures that the vertical slide 309 moves linearly along a predetermined trajectory during lifting, avoiding deviation or wobbling of the vertical slide 309 during movement. The cooperation between the lifting slide rail 311 and the lifting slider 310 provides stable guidance and limitation for the up-and-down movement of the dial mechanism.

[0086] The rotation drive mechanism employs an electric rotary gripper, which includes at least two drive grippers 306, a gripper moving motor 307 for controlling the radial movement of the drive grippers 306, and a gripper rotating motor 308 for driving the drive grippers 306 to rotate. The shifting head mechanism is connected to the drive grippers 306. There can be two or three drive grippers 306, and their radial positions are adjustable. There can be one or more shifting head mechanisms. For example, if one shifting head mechanism is provided, it can be installed on one of the drive grippers 306. The position of the drive gripper 306 can be adjusted by the gripper moving motor 307 so that the shifting head can correspond to the pitch circle of the bolt hole 606 of the brake disc 600, allowing the shifting head to be smoothly inserted into the bolt hole 606. The radial position of the drive grippers 306 is adjustable, which can adapt to bolt holes 606 in different positions, thereby adapting to the rotation drive of brake discs 600 of different sizes. The gripper rotation motor 308 can drive the dial mechanism to rotate after the dial mechanism position is adjusted, so that the brake disc 600 can rotate automatically, thereby meeting the measurement requirements of the brake disc 600.

[0087] The electric rotary gripper can be an electric rotary gripper manufactured by Huizhou Kedao Artificial Intelligence Technology Co., Ltd., such as the KD-JJR28A-10DL-1SS model electric rotary gripper.

[0088] The actuating lever 301 has a lever head at its top, and the outer cylinder 302 of the lever has a limiting ring platform for limiting the lever head. The limiting ring platform can limit the lever head of the actuating lever 301. When the actuating lever 301 floats up and down under the action of the lever spring 303, the limiting ring platform can prevent the actuating lever 301 from dislodging from the outer cylinder 302, ensuring that the actuating lever 301 always moves within a reasonable range, thus ensuring the stability and safety of the actuating mechanism.

[0089] When measuring the brake disc 600, a robot can be used to grip and load it. The cone sleeve 201 guides and positions the center hole 605 of the brake disc 600. The inner end face 604 of the brake disc 600's cap is supported on the positioning fixture 202. The centering of the cone sleeve 201 and the support of the positioning fixture 202 enable stable and accurate positioning of the brake disc 600. The measuring sensor moves towards the brake disc 600 under the action of the measuring drive mechanism. Once the measuring sensor reaches the measuring position 101, the probe of the first measuring sensor 401 acts on the upper braking surface 601 of the brake disc 600, the probe of the second measuring sensor 402 acts on the lower braking surface 602 of the brake disc 600, and the third measuring sensor... The probe of the third measuring sensor 403 acts on the outer end face 603 of the brake disc 600. The measuring end face of the third measuring sensor 403 should avoid the insertion position of the shift head and the bolt hole 606 of the brake disc 600. Then, the shift head mechanism moves downward toward the brake disc 600 under the action of the shift lever lifting drive cylinder 304. After moving to the lower position, the shift head acts on the outer end face 603 of the brake disc 600, and the position of the shift head corresponds to the pitch circle of the bolt hole 606 of the brake disc 600. The rotation drive mechanism is activated, and the shift head moves along the pitch circle of the bolt hole 606 of the brake disc 600 until the shift head moves to a bolt hole 606 and inserts into the bolt hole 606. The rotation drive mechanism continues to operate, and the shift head rotates the brake disc 600. The measuring sensor measures the brake... The brake disc 600 is measured. After the measurement is completed, the lever 301 is raised by the lever lifting drive cylinder 304, and the measuring sensor returns to its original position under the action of the measuring drive mechanism. The robot can then remove the measured brake disc 600 and replace it with the next brake disc 600. The tooling library 102 stores various models of cone sleeves 201 and positioning fixtures 202. When changing the brake disc 600, the cone sleeve 201 and positioning fixture 202 on the measuring position 101 are placed into the tooling library 102 by the changing gripper 501. The changing gripper 501 can be used to adjust the probe position of the measuring sensor to the zero position, or the measuring sensor can return to the zero position by its own weight. The third measuring sensor 403 can return to the zero position under the action of the spring reset mechanism. According to the model of the brake disc 600 being switched, the position of the measuring sensor is adjusted by the changing gripper 501. A new cone sleeve 201 and positioning fixture 202 are picked up from the tooling library 102 and placed on the measuring position 101. The lifting servo cylinder 207 adjusts the spring force of the cone sleeve spring 204 according to the weight of the brake disc 600 to ensure that the inner end face 604 of the disc cap of the brake disc 600 is supported on the support surface of the positioning fixture 202. The rotation drive mechanism adjusts the position of the lever 301 according to the pitch circle of the bolt hole 606 of the brake disc 600 after the change to ensure that the lever can be smoothly inserted into the bolt hole 606 of the brake disc 600 to realize the rotation drive of the brake disc 600. After that, the brake disc 600 after the change can be automatically measured.This automatic brake disc changeover measurement device has a compact structure, makes full use of vertical space, and is easy to operate. It utilizes robots to load and unload brake discs 600, meeting the requirements for automatic pick-and-place of brake discs 600. It also achieves automatic positioning, rotation, measurement, and changeover functions for brake discs 600, satisfying the measurement needs of different models of brake discs 600. This significantly reduces the labor intensity of workers and greatly improves the measurement efficiency and quality of brake discs 600. Furthermore, compared to using multiple multi-axis robotic arms for brake disc 600 measurement, this device also significantly reduces measurement costs.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic brake disc model changing and measuring apparatus comprising a frame (100), a workpiece positioning mechanism (200) provided on the frame (100) for positioning a brake disc (600), a workpiece rotating mechanism (300) for driving the brake disc (600) to rotate, and a workpiece measuring mechanism (400) for measuring the brake disc (600), characterized in that, The rack (100) is provided with a measuring position (101), the workpiece positioning mechanism (200) comprises a taper sleeve (201) and a positioning fixture (202) arranged on the measuring position (101), the taper sleeve (201) is arranged in a floating manner, the taper sleeve (201) is used for positioning a center hole (605) of the brake disc (600), the positioning fixture (202) is in a cylindrical structure, and the positioning fixture (202) is used for supporting an inner end surface (604) of a disc cap of the brake disc (600); the workpiece measuring mechanism (400) comprises a measuring sensor used for measuring an end surface of the brake disc (600) and a measuring driving mechanism used for driving the measuring sensor to move; The rack (100) is further provided with a tool library (102), and the tool library (102) is used for storing the taper sleeve (201) and the positioning fixture (202) to be replaced; The rack (100) is further provided with a replacement adjustment mechanism (500), the replacement adjustment mechanism (500) is used for replacing the taper sleeve (201) and the positioning fixture (202) and adjusting the position of the measuring sensor; The replacement adjustment mechanism (500) comprises a replacement pneumatic clamp jaw and a three-axis sliding table (502) used for adjusting the position of the replacement pneumatic clamp jaw, the three-axis sliding table (502) is arranged on the rack (100), and a driving end of the three-axis sliding table (502) is connected with the replacement pneumatic clamp jaw; the replacement pneumatic clamp jaw comprises a plurality of replacement clamp jaws (501), an inner side of the replacement clamp jaw (501) can be used for clamping the taper sleeve (201), and an outer side of the replacement clamp jaw (501) can be used for supporting the positioning fixture (202) from inside; The measuring sensor comprises a first measuring sensor (401) acting on an upper braking surface (601) of the brake disc (600), a second measuring sensor (402) acting on a lower braking surface (602) of the brake disc (600), and a third measuring sensor (403) acting on a disc cap outer end surface (603) of the brake disc (600); The replacement clamp jaw (501) is provided with a height adjustment notch (5011) used for adjusting the height of the first measuring sensor (401) and the second measuring sensor (402), the replacement clamp jaw (501) is further provided with a transverse movement adjustment notch (5012) used for horizontally pushing the measuring sensor to adjust the horizontal position of the measuring sensor, and a jaw end surface (5013) of the replacement clamp jaw (501) can act on the third measuring sensor (403) to adjust the height position of the third measuring sensor (403).

2. The brake disc automatic changeover measuring apparatus according to claim 1, characterized by The rack (100) is provided with a first Z-direction guide rail (404) and a second Z-direction guide rail (411), and the first Z-direction guide rail (404) and the second Z-direction guide rail (411) are connected with the rack (100) through an X-direction guide rail (418) and a Y-direction guide rail (421). The support of the first measuring sensor (401) and the support of the second measuring sensor (402) are connected with the first Z-direction guide rail (404) through the first slider (405) and the second slider (407) respectively; the support of the third measuring sensor (403) is connected with the second Z-direction guide rail (411) through the third slider (412).

3. The brake disc automatic changeover measuring apparatus according to claim 2, characterized by The support of the first measuring sensor (401) and the support of the second measuring sensor (402) are respectively provided with the first vertical adjusting plate (409) and the second vertical adjusting plate (410) which are matched with the height adjusting slot (5011), and the mounting plate of the first Z-direction guide rail (404) and the mounting plate of the second Z-direction guide rail (411) are respectively provided with the first horizontal moving knob (424) and the second horizontal moving knob (414) which are matched with the horizontal moving adjusting slot (5012).

4. The brake disc automatic changeover measuring apparatus according to claim 3, characterized by The support of the third measuring sensor (403) and the mounting plate of the second Z-direction guide rail (411) are further provided with a spring return mechanism; The spring return mechanism comprises a spring sleeve (415), a spring support (416) and a return spring (417) located in the spring sleeve (415), the spring sleeve (415) is arranged on the mounting plate of the second Z-direction guide rail (411), the upper end of the spring support (416) is connected with the support of the third measuring sensor (403), the lower end of the spring support (416) is inserted into the spring sleeve (415), and the return spring (417) is arranged between the spring support (416) and the bottom of the spring sleeve (415).

5. The automatic changeover measuring apparatus for brake discs according to any one of claims 1 to 4, characterized in that, The cone sleeve (201) is connected with the cone sleeve support shaft (203) through the inner core cone (205), the cone sleeve support shaft (203) is provided with an axis limiting table (206), the inner core cone (205) is slidingly arranged on the cone sleeve support shaft (203), and a cone sleeve spring (204) is arranged on the outer side of the cone sleeve support shaft (203) between the inner core cone (205) and the axis limiting table (206); the workpiece positioning mechanism (200) further comprises a lifting adjusting mechanism for adjusting the compression amount of the cone sleeve spring (204), and the lifting adjusting mechanism comprises a lifting servo cylinder (207), the lifting servo cylinder (207) is arranged on the rack (100), and the piston rod of the lifting servo cylinder (207) is connected with the cone sleeve support shaft (203).

6. The brake disc automatic changeover measuring apparatus according to claim 5, characterized by The positioning jig (202) is connected with the rack (100) through a pneumatic chuck (208), and the pneumatic chuck (208) comprises a plurality of pneumatic clamping jaws (2081) for positioning and supporting the positioning jig (202).

7. The automatic changeover measuring apparatus for brake discs according to any one of claims 1 to 4, characterized in that, The workpiece shifting mechanism (300) comprises a shifting head mechanism, a rotating driving mechanism for adjusting the position of the shifting head mechanism and driving the rotation of the shifting head mechanism, and a lifting driving mechanism for driving the up-down action of the shifting head mechanism, and the shifting head mechanism is connected with the rotating driving mechanism and the lifting driving mechanism; The dial head mechanism comprises a dial rod outer cylinder (302) and a dial rod (301) which is floatingly arranged in the dial rod outer cylinder (302), the dial head at the lower end of the dial rod (301) extends out of the dial rod outer cylinder (302) and can be inserted and matched with the bolt hole (606) of the brake disc (600), and under the action of the rotating driving mechanism, the dial rod (301) can drive the brake disc (600) to rotate.

8. The brake disc automatic changeover measuring apparatus according to claim 7, characterized by The dial head mechanism comprises a dial rod spring (303) which is arranged in the dial rod outer cylinder (302) and the lower end of the dial rod spring (303) acts on the dial rod (301).

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