Automatic changing device for brake disc workpieces

Abstract

The utility model relates to an automatic changing device of brake disc workpiece belongs to brake disc positioning changing technical field. It includes frame, workpiece positioning frock and changing adjustment mechanism, and workpiece positioning frock includes taper sleeve and positioning fixture, and taper sleeve sets up floatingly, and taper sleeve is used for positioning the center hole of brake disc, and positioning fixture is used for supporting the inner end face of the cap of brake disc, and changing adjustment mechanism includes frock library, changing pneumatic clamping jaw and changing drive mechanism, and frock library is used for storing the taper sleeve and positioning fixture of waiting for changing, and changing pneumatic clamping jaw can automatically change the taper sleeve and positioning fixture under the action of changing drive mechanism. When needing to change the measurement of brake disc, changing pneumatic clamping jaw can take down the original taper sleeve and positioning fixture and put back frock library, and can clamp the taper sleeve and positioning fixture of corresponding model and move to workpiece positioning frock, realize the automatic change of the taper sleeve and positioning fixture of corresponding model, and the whole changing is quick and efficient, reduces the labor intensity of worker.

Description

Technical Field

[0001] This utility model relates to an automatic changing device for brake disc workpieces, belonging to the field of brake disc positioning and changing 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 brake surface thickness. 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] When faced with various models of brake discs, the corresponding positioning fixture needs to be adjusted according to the model of the brake disc. The existing method involves manually removing the original positioning fixture and replacing it with the corresponding model positioning fixture to ensure that the positioning fixture corresponds to the model of the brake disc to be measured, so as to achieve stable positioning of the corresponding model of brake disc. This method of changing the brake disc positioning fixture is not only inefficient, but also has a high labor intensity for workers, which will affect the efficiency of brake disc measurement.

[0005] In order to match the automated production of brake discs, reduce the labor intensity of workers, and solve the problem of low efficiency in manual changeover of various types of brake discs, there is an urgent need for an automatic changeover device for brake disc workpieces that can automatically change the form and improve the changeover efficiency of brake discs. Utility Model Content

[0006] This utility model addresses the shortcomings of existing technologies by providing an automatic changeover device for brake disc workpieces.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An automatic changing device for a brake disc workpiece includes a frame and a workpiece positioning fixture mounted on the frame. The workpiece positioning fixture includes a cone sleeve and a positioning jig. The cone sleeve is floating and is used to position the center hole of the brake disc. The positioning jig is used to support the inner end face of the disc cap of the brake disc. The device also includes a changing adjustment mechanism for replacing the cone sleeve and the positioning jig when changing the brake disc. The type-changing adjustment mechanism includes a tooling magazine, a type-changing pneumatic gripper, and a type-changing drive mechanism for driving the type-changing pneumatic gripper to move on the frame. The tooling magazine is used to store the cone sleeve and positioning jig to be changed. The type-changing pneumatic gripper can automatically change the cone sleeve and positioning jig under the action of the type-changing drive mechanism.

[0008] The beneficial effects of this utility model are as follows: The tooling library stores various models of tapered sleeves and positioning fixtures. When it is necessary to change the model of the brake disc, the original tapered sleeve and positioning fixture are removed using a shape-changing adjustment mechanism according to the size of the corresponding model of brake disc. Then, the corresponding model of tapered sleeve and positioning fixture from the tooling library are installed onto the workpiece positioning fixture, realizing the automatic shape-changing of the tapered sleeve and positioning fixture of the workpiece positioning fixture, so as to meet the stable positioning requirements of the brake disc after shape-changing. After the tapered sleeve and positioning fixture are placed in place, the tapered sleeve can play a role in centering and centering the center hole of the brake disc. The floating tapered sleeve can buffer the placement of the brake disc and ensure that the inner end face of the brake disc cap can act on the positioning fixture. The centering of the tapered sleeve and the support of the positioning fixture can achieve stable and accurate positioning of the brake disc workpiece. When a brake disc needs to be changed for measurement, the pneumatic gripper can remove the original cone sleeve and positioning fixture and put them back into the tooling library. It can also pick up the corresponding type of cone sleeve and positioning fixture and move them to the workpiece positioning fixture. This enables the automatic replacement of the corresponding type of cone sleeve and positioning fixture. The entire changeover is fast and efficient, reducing the labor intensity of workers.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the changing pneumatic gripper includes multiple changing grippers, the inner side of the changing gripper is used to grip the cone sleeve, and the outer side of the changing gripper is used to internally support the positioning fixture.

[0011] The beneficial effect of adopting the above-mentioned further solution is that by utilizing the inner and outer sides of the jaws of the changing gripper, it can not only meet the need to hold the cone sleeve, but also internally support the positioning fixture to meet the need to grasp the positioning fixture, thereby realizing the purpose of automatic replacement of the cone sleeve and the positioning fixture, and preparing for the measurement of various types of brake discs in the future.

[0012] Furthermore, the positioning fixture has a cylindrical structure.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the support surface of the cylindrical positioning jig provides more stable and reliable support to the inner end face of the brake disc cap.

[0014] Furthermore, the type-changing pneumatic gripper can move in the X, Y, and Z directions under the action of the type-changing drive mechanism.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the shape-changing drive mechanism can drive the shape-changing pneumatic gripper to move in three-dimensional space, meeting the needs of automatic replacement of the cone sleeve and positioning fixture, and improving the gripping and adjustment capabilities of the cone sleeve and positioning fixture at different positions. The shape-changing drive mechanism can adopt a three-axis slide table, which can meet the three-dimensional spatial movement requirements of the shape-changing gripper and the movement requirements of the shape-changing gripper in the X, Y, and Z directions.

[0016] Furthermore, the tapered sleeve includes a tapered sleeve connector and a tapered sleeve body disposed on the tapered sleeve connector.

[0017] The advantages of adopting the above-mentioned further solution are that the tapered sleeve can be installed on the tapered sleeve connector by fasteners. The inner wall of the tapered sleeve connector has a tapered surface structure, which facilitates the removal and placement of the tapered sleeve and makes it convenient for automatic replacement of the tapered sleeve. In addition, the self-locking property of the tapered surface structure ensures the stable positioning of the tapered sleeve.

[0018] Furthermore, the tapered sleeve is floatingly mounted on the tapered sleeve support shaft by a spring, and the tapered sleeve support shaft is provided with a shaft limiting platform, with the spring located between the tapered sleeve and the shaft limiting platform.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the cone sleeve can float up and down under the action of the spring, satisfying the floating setting of the cone sleeve. On the one hand, it buffers the impact when the cone sleeve and brake disc are placed; on the other hand, the inner end face of the brake disc cap, which is positioned by the cone sleeve, can be supported on the positioning fixture, satisfying the requirement of stable positioning of the brake disc.

[0020] 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 top cover for limiting the inner core cone. The tapered sleeve mates with the conical surface of the inner core cone, and the upper end of the spring acts on the inner core cone.

[0021] The beneficial effect of adopting the above-mentioned further solution is that, in order to meet the automatic replacement of the tapered sleeve, the tapered sleeve is connected to the tapered sleeve support shaft through the inner core cone. In this way, the tapered surface of the tapered sleeve and the inner core cone are in contact, which facilitates the automatic replacement of tapered sleeves of different models. The inner core cone is slidably set on the tapered sleeve support shaft. In order to prevent the inner core cone from detaching from the tapered sleeve support shaft, a shaft top cover is also set to limit it, ensuring that the inner core cone slides on the tapered sleeve support shaft.

[0022] Furthermore, it also includes a lifting mechanism, which includes a lifting servo cylinder mounted on the frame, and the piston rod of the lifting servo cylinder is connected to the tapered sleeve support shaft.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the lifting mechanism can adjust the compression of the spring. Brake discs of different weights will have different spring compressions; the heavier the brake disc, the greater the spring compression, thus meeting the requirements of the positioning fixture for supporting the end face of the brake disc. However, for lighter brake discs, the spring compression is smaller, which may result in the end face of the brake disc not contacting the positioning fixture. To ensure that the end face of the brake disc positioned on the cone sleeve can contact the positioning fixture, thereby achieving stable support for the brake disc, a lifting mechanism is provided. This lifting mechanism can adjust the spring compression and control the appropriate cone sleeve spring force, ensuring that the inner end face of the brake disc cap is accurately supported on the positioning fixture. This better adapts to the centering and stable positioning requirements of various brake disc models, enhancing the versatility and practicality of the device and providing strong support for the measurement of multiple brake disc models. The lifting servo cylinder can provide stable power output, ensuring that the cone sleeve can move smoothly up and down. To obtain the appropriate cone sleeve elasticity, so that the disc end face of the brake disc placed on the cone sleeve can be supported by the positioning fixture.

[0024] 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.

[0025] 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 selected, where the three pneumatic jaws can position the positioning fixture from the outer side of the jaws, providing positioning and stable support for 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. When changing the brake disc, 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, preparing for subsequent brake disc measurements.

[0026] Furthermore, the pneumatic chuck is mounted on the frame via a mounting sleeve.

[0027] The beneficial effect of adopting the above-mentioned further solution is that the mounting sleeve is set on the frame, and the pneumatic chuck is set on the mounting sleeve. The mounting sleeve enables the connection between the pneumatic chuck and the frame, thereby achieving the installation and positioning of the pneumatic chuck. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the model change adjustment mechanism of this utility model; Figure 3 This is a schematic diagram of the structure of the pneumatic gripper of this utility model; Figure 4 This is a schematic diagram of the workpiece positioning fixture of this utility model; Figure 5 This is a schematic diagram of the main structure of the workpiece positioning fixture of this utility model; Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure along the AA direction; Figure 7 This is a structural schematic diagram of the positioning brake disc of this utility model; Figure 8 This is a structural schematic diagram of the workpiece positioning fixture positioning brake disc of this utility model. Figure 9 A schematic diagram of the structure of the brake disc at angle one; Figure 10 This is a structural schematic diagram of angle two of the brake disc; In the diagram, 100 is the frame; 101 is the measuring position; 200 is the workpiece positioning fixture; 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 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; 300 is the shape change adjustment mechanism; 301 is the shape change pneumatic gripper; 3011 is the shape change gripper; 302 is the shape change drive mechanism; 303 is the tooling library; 400 is the brake disc; 401 is the center hole; and 402 is the inner end face of the disc cap. Detailed Implementation

[0029] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0030] like Figures 1-10 As shown, an automatic changing device for a brake disc workpiece includes a frame 100 and a workpiece positioning fixture 200 mounted on the frame 100. The workpiece positioning fixture 200 includes a conical sleeve 201 and a positioning jig 202. The conical sleeve 201 is floating and is used to position the center hole 401 of the brake disc 400. The positioning jig 202 is used to support the inner end face 402 of the disc cap of the brake disc 400. The device also includes a changing adjustment mechanism for replacing the conical sleeve 201 and the positioning jig 202 when changing the brake disc 400. The type-changing adjustment mechanism includes a tooling magazine 303, a type-changing pneumatic gripper 301, and a type-changing drive mechanism 302 for driving the type-changing pneumatic gripper 301 to move, all mounted on the frame 100. The tooling magazine 303 is used to store the conical sleeve 201 and the positioning fixture 202 to be changed. The type-changing pneumatic gripper 301 can automatically change the conical sleeve 201 and the positioning fixture 202 under the action of the type-changing drive mechanism 302.

[0031] The pneumatic gripper 301 includes multiple grippers 3011. The inner side of each gripper 3011 is used to hold the cone sleeve 201, and the outer side of each annular gripper is used to internally support the positioning fixture 202. By utilizing the inner and outer sides of the grippers 3011, the grippers can both hold the cone sleeve 201 and internally support the positioning fixture 202 to meet the need for gripping the positioning fixture 202, thereby achieving the purpose of automatic replacement of the cone sleeve 201 and the positioning fixture 202, preparing for the subsequent measurement of various models of brake discs 400.

[0032] The workpiece positioning fixture 200 is set at the measuring position 101 of the frame 100.

[0033] The positioning fixture 202 has a cylindrical structure. The support surface of the cylindrical positioning fixture 202 provides more stable and reliable support for the inner end face 402 of the brake disc 400.

[0034] The changing pneumatic gripper 301 can move in the X, Y, and Z directions under the action of the changing drive mechanism 302. The changing drive mechanism 302 can drive the changing pneumatic gripper 301 to move in three-dimensional space, meeting the needs of automatic replacement of the cone sleeve 201 and the positioning fixture 202, and improving the gripping and adjustment capabilities of the cone sleeve 201 and the positioning fixture 202 at different positions. The changing drive mechanism 302 can be a three-axis slide table, which can meet the three-dimensional movement requirements of the changing gripper 3011 and satisfy the movement requirements of the changing gripper 3011 in the X, Y, and Z directions.

[0035] The tapered sleeve 201 includes a tapered sleeve connector 2012 and a tapered sleeve body 2011 disposed on the tapered sleeve connector 2012. The tapered sleeve 201 can be installed on the tapered sleeve connector 2012 with fasteners. The inner wall of the tapered sleeve connector 2012 has a tapered surface structure, which facilitates the removal and placement of the tapered sleeve 201 and the automatic replacement of the tapered sleeve 201. In addition, the self-locking characteristic of the tapered surface structure ensures the stable positioning of the tapered sleeve 201.

[0036] The cone sleeve 201 is floatingly mounted on the cone sleeve support shaft 203 by a spring 204. The cone sleeve support shaft 203 is provided with a shaft limiting platform 206, and the spring 204 is located between the cone sleeve 201 and the shaft limiting platform 206. The cone sleeve 201 can float up and down under the action of the spring 204, satisfying the floating setting of the cone sleeve 201. This serves two purposes: firstly, it buffers the impact when the cone sleeve 201 and the brake disc 400 are placed; secondly, the inner end face 402 of the brake disc 400, positioned by the cone sleeve 201, can be supported on the positioning fixture 202, meeting the requirement for stable positioning of the brake disc 400.

[0037] The tapered sleeve 201 is connected to the tapered sleeve support shaft 203 via an inner core cone 205. The tapered sleeve support shaft 203 has a shaft top cover for limiting the inner core cone 205. The tapered sleeve 201 and the inner core cone 205 have a tapered surface fit. The upper end of the spring 204 acts on the inner core cone 205, and the lower end of the spring 204 acts on the shaft limiting platform 206. To facilitate automatic replacement of the tapered sleeve 201, the tapered sleeve 201 is connected to the tapered sleeve support shaft 203 via the inner core cone 205. This tapered surface fit between the tapered sleeve 201 and the inner core cone 205 facilitates automatic replacement of different models of tapered sleeves 201. The inner core cone 205 is slidably mounted on the tapered sleeve support shaft 203. To prevent the inner core cone 205 from detaching from the tapered sleeve support shaft 203, a shaft top cover is provided to limit its movement, ensuring that the inner core cone 205 slides on the tapered sleeve support shaft 203.

[0038] It also includes a lifting mechanism, which comprises a lifting servo cylinder 207 mounted on the frame 100. The piston rod of the lifting servo cylinder 207 is connected to the tapered sleeve support shaft 203. The lifting mechanism can adjust the compression of the spring 204. The compression of the spring 204 will vary depending on the weight of the brake disc 400; a heavier brake disc 400 will result in a greater compression of the spring 204, which can meet the load-bearing support requirements of the positioning fixture 202 on the disc end face of the brake disc 400. For the lightweight brake disc 400, the compression of the spring 204 is small, which may cause the disc end face of the brake disc 400 to fail to contact the positioning fixture 202. To ensure that the disc end face of the brake disc 400, positioned on the cone sleeve 201, can contact the positioning fixture 202 and achieve stable support for the brake disc 400, a lifting mechanism is provided. This lifting mechanism can adjust the compression of the spring 204 and control the appropriate elasticity of the cone sleeve 201, thereby ensuring that the inner end face 402 of the brake disc 400 is accurately supported on the positioning fixture 202. This better adapts to the centering and stable positioning requirements of various brake disc models 400, enhancing the versatility and practicality of the device and providing strong support for the measurement of multiple brake disc models 400. The lifting servo cylinder 207 provides stable power output, ensuring that the cone sleeve 201 can move smoothly up and down. To obtain a suitable elastic force for the cone sleeve 201, so that the disc end face of the brake disc 400 placed on the cone sleeve 201 can accept the support of the positioning fixture 202.

[0039] The positioning fixture 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 fixture 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, where the three pneumatic jaws 2081 can internally support and position the positioning fixture 202 from the outer side of the jaws, providing positioning and stable support from three different directions, ensuring that the positioning fixture 202 does not shift or shake during measurement. The radial position of the pneumatic jaws 2081 of the pneumatic chuck 208 is adjustable. When the brake disc 400 is changed, the radial position of the pneumatic jaws 2081 can be adjusted according to the size of the different positioning fixtures 202 to achieve stable support for the positioning fixture 202, preparing for subsequent measurement of the brake disc 400.

[0040] The pneumatic chuck 208 is mounted on the frame 100 via a mounting sleeve 210. The mounting sleeve 210 is mounted on the frame 100, and the pneumatic chuck 208 is mounted on the mounting sleeve 210. The mounting sleeve 210 connects the pneumatic chuck 208 to the frame 100, enabling the installation and positioning of the pneumatic chuck 208. The mounting sleeve 210 has a through hole for the tapered sleeve support shaft 203 to pass through.

[0041] The tapered sleeve support shaft 203 includes a tapered sleeve connecting shaft and a splined shaft disposed at the bottom of the tapered sleeve connecting shaft. The mounting sleeve 210 contains a splined sleeve 209 that mates with the splined shaft. 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 relative rotation during the positioning of the brake disc 400, thereby ensuring the accuracy and reliability of the brake disc 400 positioning. The structure of the tapered sleeve support shaft 203 also facilitates individual maintenance of the tapered sleeve connecting shaft or the splined shaft, reducing maintenance costs.

[0042] The tooling library 303 stores various models of tapered sleeves 201 and positioning fixtures 202. When it is necessary to change the model of the brake disc 400, the original tapered sleeves 201 and positioning fixtures 202 are removed using the changing and adjusting mechanism 300 according to the size of the corresponding model of brake disc 400. Then, the corresponding model of tapered sleeve 201 in the tooling library 303 is placed on the inner core cone 205 and mates with the conical surface of the inner core cone 205. The positioning fixture 202 is placed on the pneumatic chuck 208. The pneumatic jaws 2081 support and lock the positioning fixture 202, realizing the automatic changing of the tapered sleeves 201 and positioning fixtures 202 of the workpiece positioning tooling 200, so as to meet the stable positioning requirements of the brake disc 400 after the change. After the cone sleeve 201 and positioning fixture 202 are in place, when placing the brake disc 400, the cone sleeve 201 can guide and position the center hole 401 of the brake disc 400. The floating cone sleeve 201 can buffer the placement of the brake disc 400 and ensure that the inner end face 402 of the brake disc 400 can act on the positioning fixture 202. The centering of the cone sleeve 201 and the support of the positioning fixture 202 can achieve stable and accurate positioning of the brake disc 400. This utility model has a simple structure and is easy to operate. The changing adjustment mechanism 300 can realize the automatic replacement of the cone sleeve 201 and positioning fixture 202, which can meet the positioning requirements of the brake disc 400 during the changing process. The automatic replacement does not require manual intervention, reducing the labor intensity of workers and improving the changing and positioning efficiency of the brake disc 400.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic form-changing device for brake disc workpieces, comprising a frame (100) and a workpiece positioning fixture (200) disposed on the frame (100), characterized in that, The workpiece positioning fixture (200) includes a tapered sleeve (201) and a positioning jig (202). The tapered sleeve (201) is floating and is used to position the center hole (401) of the brake disc (400). The positioning jig (202) is used to support the inner end face (402) of the disc cap of the brake disc (400). It also includes a shape-changing adjustment mechanism (300). The type-changing adjustment mechanism (300) includes a tooling library (303), a type-changing pneumatic gripper (301), and a type-changing drive mechanism (302) for driving the type-changing pneumatic gripper (301) to move on the frame (100). The tooling library (303) is used to store the cone sleeve (201) and positioning fixture (202) to be changed. Under the action of the type-changing drive mechanism (302), the type-changing pneumatic gripper (301) can automatically change the cone sleeve (201) and positioning fixture (202).

2. The automatic changing device for brake disc workpieces according to claim 1, characterized in that, The changing pneumatic gripper (301) includes multiple changing grippers (3011), the inner side of the changing gripper (3011) is used to grip the cone sleeve (201), and the outer side of the changing gripper (3011) is used to internally support the positioning fixture (202).

3. The automatic changeover device for brake disc workpieces according to claim 1, characterized in that, The positioning fixture (202) has a cylindrical structure.

4. The automatic changing device for brake disc workpieces according to claim 1, characterized in that, The changing pneumatic gripper (301) can move in the X, Y and Z directions under the action of the changing drive mechanism (302).

5. The automatic changing device for brake disc workpieces according to claim 1, characterized in that, The tapered sleeve (201) includes a tapered sleeve connector (2012) and a tapered sleeve body (2011) disposed on the tapered sleeve connector (2012).

6. The automatic changing device for brake disc workpieces according to any one of claims 1-5, characterized in that, The tapered sleeve (201) is floatingly mounted on the tapered sleeve support shaft (203) by a spring (204). The tapered sleeve support shaft (203) is provided with a shaft limiting platform (206), and the spring (204) is located between the tapered sleeve (201) and the shaft limiting platform (206).

7. The automatic changing device for brake disc workpieces according to claim 6, characterized in that, 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 top cover for limiting the inner core cone (205). The tapered sleeve (201) and the inner core cone (205) are in conical contact. The upper end of the spring (204) acts on the inner core cone (205).

8. The automatic changeover device for brake disc workpieces according to claim 6, characterized in that, It also includes a lifting mechanism, which includes a lifting servo cylinder (207), which is mounted on the frame (100), and the piston rod of the lifting servo cylinder (207) is connected to the tapered sleeve support shaft (203).

9. The automatic changing device for brake disc workpieces according to any one of claims 1-5, characterized in that, The positioning fixture (202) is connected to the frame (100) via a pneumatic chuck (208), which includes a plurality of pneumatic jaws (2081) for positioning and supporting the positioning fixture (202).

10. The automatic changing device for brake disc workpieces according to claim 9, characterized in that, The pneumatic chuck (208) is mounted on the frame (100) via a mounting sleeve (210).

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