Brake disc arrangement

Abstract

The utility model discloses a kind of brake disc devices. Brake disc device includes disc hub, the disc body of sleeve being set to disc hub outside, the fastening assembly of connecting disc hub and disc body, fastening assembly includes the main part passing through disc body and disc hub, the first pressure part and the second pressure part connected to main part, the first pressure part and the second pressure part are pressed together to disc body and disc hub, main part is equipped with radial shrink section, the axial two sides of radial shrink section are respectively adjacent to two shaft sections, the diameter of two shaft sections adjacent to radial shrink section is all greater than the minimum diameter of radial shrink section. In the utility model, under the working condition of high impact, high vibration, radial shrink section can be adaptively flexibly deformed, so that stress concentration is not easy to generate on main part, thereby improving the fatigue resistance of fastening assembly, when brake disc device is used, main part is not prone to fracture and other conditions, ensure the reliability and service life of brake disc device work, when brake disc device is applied to railway vehicle, ensure that railway vehicle can safely travel.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, and in particular to a brake disc device. Background Technology

[0002] In rail vehicles, the brake disc assembly is a critical component ensuring the vehicle's safe stopping. The brake disc hub is connected to the axle, and the disc body and hub are linked together by fastening components. During rail vehicle operation, due to the complex and variable track conditions, the fastening components must withstand high impact and high vibration conditions. Under these conditions, existing brake disc assemblies may experience fatigue due to stress concentration caused by bending, leading to fracture and compromising the safe operation of the rail vehicle. Utility Model Content

[0003] This utility model provides a brake disc device, the purpose of which is to solve the problem in the prior art that the fastening components of the brake disc device will experience fatigue due to stress concentration caused by bending, resulting in fracture.

[0004] To achieve the above objectives, this utility model provides a brake disc device, including a disc hub, a disc body sleeved outside the disc hub, and a fastening assembly connecting the disc hub and the disc body. The fastening assembly includes a main body portion passing through the disc body and the disc hub, and a first pressing portion and a second pressing portion connected to the main body portion. The first pressing portion and the second pressing portion press the disc body and the disc hub together. The main body portion is provided with a radial reduction section, and two shaft segments are adjacent to each other on both axial sides of the radial reduction section. The diameters of the two shaft segments adjacent to the radial reduction section are both greater than the minimum diameter of the radial reduction section.

[0005] As a further improvement of this utility model, the fastening assembly further includes a sleeve, which is sleeved outside the radial reduction section and extends to two shaft segments adjacent to the radial reduction section. The inner diameter of the sleeve matches the diameter of the two shaft segments adjacent to the radial reduction section.

[0006] As a further improvement of this utility model, a first protrusion is formed on the disc hub, a second protrusion is formed on the disc body, and the brake disc device further includes a pressing member. The second protrusion is located between the pressing member and the first protrusion. The main body passes through the first protrusion, the second protrusion and the pressing member. The first pressing member and the second pressing member press the first protrusion, the second protrusion and the pressing member together.

[0007] As a further improvement of this utility model, the radial reduction section includes a first radial reduction section, and the shaft section includes a first shaft section and a second shaft section adjacent to the first radial reduction section. The first shaft section and at least a portion of the first radial reduction section extend to the side of the first protrusion away from the second protrusion, and the first pressing portion is connected to the first shaft section.

[0008] As a further improvement of this utility model, the sleeve includes a first sleeve, which is sleeved outside the first diameter reduction section and extends from the first diameter reduction section to the first shaft section and the second shaft section. The inner diameter of the first sleeve matches the diameter of the first shaft section and the diameter of the second shaft section. The first pressing part presses against the first protrusion through the first sleeve.

[0009] As a further improvement of this utility model, the radial reduction section includes a second radial reduction section, and the shaft section includes a third shaft section and a fourth shaft section adjacent to the second radial reduction section. The third shaft section and at least a portion of the second radial reduction section extend to the side of the pressing member away from the second protrusion, and the second pressing part is connected to the third shaft section.

[0010] As a further improvement of this utility model, the sleeve includes a second sleeve, which is sleeved outside the second diameter reduction section and extends from the second diameter reduction section to the third shaft section and the fourth shaft section. The diameter of the second sleeve matches the diameter of the third shaft section and the diameter of the fourth shaft section. The second pressing part presses against the pressing member through the second sleeve.

[0011] As a further improvement of this utility model, the second pressing part is a nut, which is threadedly connected to the third shaft segment.

[0012] As a further improvement of this utility model, the radial contraction section further includes a third radial contraction section, which is located between the first radial contraction section and the second radial contraction section, and the lengths of the first radial contraction section and the second radial contraction section are both less than the length of the third radial contraction section.

[0013] As a further improvement of this utility model, the diameter reduction section includes an intermediate section and two connecting sections located on both sides of the axial direction of the intermediate section. The diameter of the connecting sections gradually increases in the direction away from the intermediate section along the axial direction of the fastening assembly.

[0014] Beneficial effects: In the brake disc device provided by this utility model, the radial reduction section is the part with a smaller diameter on the main body. Its strength is lower and it is easy to undergo flexible deformation. Thus, under high impact and high vibration conditions, the radial reduction section can adaptably deform flexibly, making it less likely for stress concentration to occur on the main body. This improves the fatigue resistance of the fastening components. When the brake disc device is in use, the main body is less likely to break, ensuring the reliability and service life of the brake disc device. When the brake disc device is applied to rail vehicles, it ensures the safe operation of the rail vehicles. Attached Figure Description

[0015] Figure 1 A front view of a brake disc device provided in an embodiment of this utility model; Figure 2 for Figure 1 A cross-sectional view of the brake disc assembly after being cut along the AA direction; Figure 3 for Figure 2 A magnified diagram of point A in the middle; Figure 4 for Figure 3 Cross-sectional view of the central fastening assembly; Figure 5 for Figure 4 A magnified diagram of the structure on the right.

[0016] In the picture: 100. Brake disc assembly; 10. Hub; 11. First protrusion; 111. First through hole; 20. Disc body; 21. Second protrusion; 211. Second through hole; 30. Fastening components; 31. Main body; 311. Recessed section; 311a. First recessed section; 311b. Second recessed section; 311c. Third recessed section; 3111. Intermediate section; 3112. Connecting section; 312. Shaft section; 312a. First shaft section; 312b. Second shaft section; 312c. Third shaft section; 312d. Fourth shaft section; 32. First pressing part; 33. Second pressing part; 34. Sleeve; 34a. First sleeve; 34b. Second sleeve; 40. Pressing element; 41. Third through hole. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0018] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0019] like Figure 1 As shown, one embodiment of this utility model provides a brake disc device 100. This brake disc device 100 can be applied to rail vehicles to enable the rail vehicles to brake.

[0020] Continue to combine Figure 2-5 As shown, the brake disc assembly 100 includes a disc hub 10, a disc body 20, and a fastening assembly 30. In use, the disc hub 10 is connected to the axle of a rail vehicle, and wheels are connected to the axle. The disc body 20 is fitted over the disc hub 10. The fastening assembly 30 connects the disc hub 10 and the disc body 20, allowing them to rotate synchronously. The disc body 20 is made of a wear-resistant material. When the rail vehicle is in motion, the disc body 20 rotates with the axle. When the brake on the rail vehicle is activated to clamp the disc body 20, the disc body 20 decelerates or stops under the friction with the brake, thereby causing the rail vehicle to decelerate or stop as well.

[0021] The fastening assembly 30 extends axially along the brake disc assembly 100 and includes a main body 31, a first pressing part 32, and a second pressing part 33. The main body 31 passes through the disc hub 10 and the disc body 20. The first pressing part 32 and the second pressing part 33 are both connected to the main body 31, and the first pressing part 32 and the second pressing part 33 press the disc hub 10 and the disc body 20 together. The disc hub 10 and the disc body 20 are located between the first pressing part 32 and the second pressing part 33. Under the pressure of the first pressing part 32 and the second pressing part 33, the disc hub 10 and the disc body 20 can be in close contact, and there is a large frictional force between the disc hub 10 and the disc body 20, so that they can rotate synchronously. In this embodiment, the first pressing part 32 and the second pressing part 33 press the disc hub 10 and the disc body 20 together along the axial direction of the brake disc assembly 100.

[0022] In this embodiment, the main body 31 is provided with a radially narrowed section 311, and two shaft segments 312 are adjacent to each other on both axial sides of the radially narrowed section 311. In other words, a radially narrowed section 311 is provided between two adjacent shaft segments 312. The diameters of the two shaft segments 312 adjacent to the radially narrowed section 311 are both greater than the minimum diameter of the radially narrowed section 311.

[0023] The narrowed section 311 is the smaller diameter part of the main body 31. It has lower strength and is prone to flexible deformation. Thus, under high impact and high vibration conditions, the narrowed section 311 can adaptably deform flexibly, making it less likely for stress concentration to occur on the main body 31. This improves the fatigue resistance of the fastening assembly 30. When the brake disc device 100 is used, the main body 31 is less likely to break, ensuring the reliability and service life of the brake disc device 100. When the brake disc device 100 is applied to rail vehicles, it ensures the safe operation of the rail vehicles.

[0024] The term "minimum diameter of the radially contracted section 311" should be understood as follows: along the axial direction of the radially contracted section 311, the diameter of the radially contracted section 311 may not be uniform, but may change. The minimum diameter of the radially contracted section 311 is the diameter at the point where the diameter of the radially contracted section 311 is the smallest.

[0025] The ratio of the minimum diameter of the constricted section 311 to the diameter of the shaft section 312 can be set between 0.6 and 0.8. This ensures that the diameter of the constricted section 311 is not too small while maintaining its flexible deformation capability. In this embodiment, the diameters of the two shaft sections 312 adjacent to the constricted section 311 are equal. In other embodiments, the diameters of the two shaft sections 312 adjacent to the constricted section 311 may not be equal. In this case, the ratio of the minimum diameter of the constricted section 311 to the diameter of the smaller of the two shaft sections 312 can be set between 0.6 and 0.8.

[0026] In this embodiment, the fastening assembly 30 further includes a sleeve 34. The sleeve 34 is specifically fitted over the reduced-diameter section 311 and extends to the two shaft segments 312 adjacent to the reduced-diameter section 311. In other words, the sleeve 34 is fitted over the reduced-diameter section 311 and the two shaft segments 312 adjacent to it. The inner diameter of the sleeve 34 matches the diameter of the two shaft segments 312 adjacent to the reduced-diameter section 311, and the gap between it and the two shaft segments 312 is small, even allowing them to fit together. Thus, the sleeve 34 can share the load borne by the reduced-diameter section 311, strengthening the reduced-diameter section 311 and making it less prone to bending deformation, thereby reducing stress concentration.

[0027] In other embodiments of this utility model, the sleeve 34 can be fitted over the tapered section 311, but does not extend to the two shaft segments 312 adjacent to the tapered section 311. In this case, the inner diameter of the sleeve 34 needs to match the tapered section 311, that is, the gap between the sleeve 34 and the tapered section 311 is small or even fits together. In the above case, the sleeve 34 can also strengthen the tapered section 311.

[0028] In this embodiment, a first protrusion 11 is formed on the hub 10, and a second protrusion 21 is formed on the disc body 20. The first protrusion 11 protrudes from the outer peripheral surface of the hub 10, and the second protrusion 21 protrudes from the inner peripheral surface of the disc body 20. The brake disc device 100 also includes a pressing member 40. The pressing member 40 and the first protrusion 11 are spaced apart, and the second protrusion 21 is located between the pressing member 40 and the first protrusion 11. The pressing member 40 and the first protrusion 11 together clamp the second protrusion 21. The main body 31 is disposed through the first protrusion 11, the second protrusion 21, and the pressing member 40. The first pressing member 32 and the second pressing member 33 press the first protrusion 11, the second protrusion 21, and the pressing member 40 together. The pressing member 40 can be specifically connected to the hub 10.

[0029] With the above configuration, under the action of the first pressing part 32 and the second pressing part 33, the first protrusion 11 and the pressing member 40 can fit tightly against the second protrusion 21, and the hub 10 and the disc body 20 can reliably rotate synchronously. The second pressing part 33 can be configured to be detachably connected to the main body 31, so that when the second pressing part 33 is removed from the main body 31, the hub 10 and the disc body 20 can be separated.

[0030] Specifically, the first protrusion 11 has a first through hole 111 through which the main body 31 passes, the second protrusion 21 has a second through hole 211 through which the main body 31 passes, and the pressing member 40 has a third through hole 41 through which the main body 31 passes. The main body 31 passes through the first protrusion 11, the second protrusion 21, and the pressing member 40, that is, the main body 31 passes through the first through hole 111, the second through hole 211, and the third through hole 41.

[0031] In this embodiment, the second pressing part 33 is a nut, which is connected to the main body 31 by a threaded connection, making it easy to install and remove. Furthermore, the second pressing part 33 can be reliably connected to the main body 31. The first pressing part 32 and the main body 31 can be integrally formed. Specifically, the first pressing part 32 and the main body 31 are bolts.

[0032] In this embodiment, more than one of the radial reduction section 311, shaft section 312, and sleeve 34 may be provided. Specifically, the radial reduction section 311 includes a first radial reduction section 311a, and the shaft section 312 includes a first shaft section 312a and a second shaft section 312b. The first shaft section 312a and the second shaft section 312b are adjacent to the first radial reduction section 311a, that is, the first shaft section 312a and the second shaft section 312b are respectively located on both axial sides of the first radial reduction section 311a. The first shaft section 312a and at least a portion of the first radial reduction section 311a extend to the side of the first protrusion 11 away from the second protrusion 21, and the first pressing part 32 is connected to the first shaft section 312a, specifically to the end of the first shaft section 312a away from the first radial reduction section 311a.

[0033] With the above configuration, the first radially contracted section 311a can be close to the first pressing part 32, thereby helping to avoid bending stress at the first pressing part 32. The first shaft section 312a and at least part of the first radially contracted section 311a extend to the side of the first protrusion 11 away from the second protrusion 21, ensuring that the main body 31 has sufficient length, making the main body 31 have sufficient flexibility, and improving the fatigue resistance of the main body 31.

[0034] The sleeve 34 includes a first sleeve 34a. The first sleeve 34a is sleeved outside the first diameter reduction section 311a and extends from the first diameter reduction section 311a to the first shaft section 312a and the second shaft section 312b. The inner diameter of the first sleeve 34a matches the diameter of the first shaft section 312a and the diameter of the second shaft section 312b. The first pressing part 32 presses against the first protrusion 11 through the first sleeve 34a.

[0035] With the above configuration, the first sleeve 34a can strengthen the first diameter reduction section 311a, avoid stress concentration at the first diameter reduction section 311a due to bending, and the first sleeve 34a is tightly clamped in the middle by the first pressing part 32 and the first protrusion 11. Under high impact and high vibration conditions, the first sleeve 34a can share the load borne by the main body 31, reduce the stress generated by bending at the first pressing part 32, and ensure the reliability of the fastening assembly 30.

[0036] The reduced-diameter section 311 also includes a second reduced-diameter section 311b, and the shaft section 312 also includes a third shaft section 312c and a fourth shaft section 312d. The third shaft section 312c and the fourth shaft section 312d are adjacent to the second reduced-diameter section 311b, that is, the third shaft section 312c and the fourth shaft section 312d are located on opposite axial sides of the second reduced-diameter section 311b. The third shaft section 312c and at least a portion of the second reduced-diameter section 311b extend to the side of the pressing member 40 away from the second protrusion 21, and the second pressing part 33 is connected to the third shaft section 312c. The third shaft section 312c is a threaded section, and the aforementioned second pressing part 33 is threadedly connected to the third shaft section 312c.

[0037] With the above configuration, the second radially contracted section 311b can be close to the second pressing part 33, thereby helping to avoid bending stress at the second pressing part 33. Furthermore, the third shaft section 312c and at least part of the second radially contracted section 311b extend to the side of the pressing member 40 away from the second protrusion 21, ensuring that the main body 31 has sufficient length, giving the main body 31 sufficient flexibility, and improving the fatigue resistance of the main body 31.

[0038] The sleeve 34 also includes a second sleeve 34b. The second sleeve 34b is sleeved outside the second diameter reduction section 311b and extends from the second diameter reduction section 311b to the third shaft section 312c and the fourth shaft section 312d. The inner diameter of the second sleeve 34b matches the diameter of the third shaft section 312c and the diameter of the fourth shaft section 312d. The second pressing part 33 presses against the pressing member 40 through the second sleeve 34b.

[0039] With the above configuration, the second sleeve 34b can strengthen the second diameter reduction section 311b, avoid stress concentration at the second diameter reduction section 311b due to bending, and the second sleeve 34b is tightly clamped in the middle by the second pressing part 33 and the pressing member 40. Under high impact and high vibration conditions, the second sleeve 34b can share the load borne by the main body 31, reduce the stress generated by bending at the second pressing part 33, and ensure the reliability of the fastening assembly 30.

[0040] In this embodiment, the constricted section 311 further includes a third constricted section 311c, which is located between the first constricted section 311a and the second constricted section 311b. The lengths of the first constricted section 311a and the second constricted section 311b are both less than the length of the third constricted section 311c.

[0041] Under high-impact and high-vibration conditions, due to the longer length of the third diameter reduction section 311c, the main body 31 is more prone to flexible deformation at the third diameter reduction section 311c. Alternatively, it can be understood that the bending deformation that should have occurred at the first diameter reduction section 311a and the second diameter reduction section 311b is transferred to the third diameter reduction section 311c. The longer length of the third diameter reduction section 311c provides sufficient flexible deformation capacity, preventing the main body 31 from breaking due to stress concentration and ensuring the reliability of the fastening assembly 30 connecting the hub 10 and the disc body 20.

[0042] In this embodiment, the third diameter reduction section 311c extends from the second through hole 211 into the first through hole 111 and the third through hole 41. The diameter of the second through hole 211 is larger than the minimum diameter of the third diameter reduction section 311c, so that the third diameter reduction section 311c has space to deform.

[0043] The two shaft segments 312 adjacent to the third radial reduction section 311c are the second shaft segment 312b and the fourth shaft segment 312d, respectively. The first radial reduction section 311a, the first shaft segment 312a, and a portion of the second shaft segment 312b extend out of the first through hole 111, and a portion of the second shaft segment 312b is also located within the first through hole 111, with the diameter of the second shaft segment 312b matching the diameter of the first through hole 111. The second radial reduction section 311b, the third shaft segment 312c, and a portion of the fourth shaft segment 312d extend out of the third through hole 41, and a portion of the fourth shaft segment 312d is also located within the third through hole 41, with the diameter of the fourth shaft segment 312d matching the diameter of the third through hole 41. With the above arrangement, in the radial direction of the brake disc device 100, the position of the main body 31 relative to the disc hub 10 can be kept fixed, and the first protrusion 11 and the pressing member 40 also provide a certain degree of support for the main body 31, ensuring the reliability of the connection between the disc hub 10 and the disc body 20.

[0044] The radial reduction section 311 includes an intermediate section 3111 and two connecting sections 3112 located on either side of the intermediate section 3111 along its axial direction. The diameter of the connecting sections 3112 gradually increases in the direction away from the intermediate section 3111 along the axial direction of the fastening assembly 30. Thus, the connecting sections 3112 seamlessly connect the intermediate section 3111 and the two adjacent shaft sections 312 of the radial reduction section 311. When the main body 31 is subjected to bending moment, stress concentration is less likely to occur between the radial reduction section 311 and the shaft sections 312, ensuring the stability and reliability of the main body 31 structure.

[0045] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A brake disc device, comprising a disc hub, a disc body sleeved outside the disc hub, and a fastening assembly connecting the disc hub and the disc body, the fastening assembly comprising a main body portion passing through the disc body and the disc hub, and a first pressing portion and a second pressing portion connected to the main body portion, the first pressing portion and the second pressing portion pressing the disc body and the disc hub together, characterized in that, The main body is provided with a radial reduction section, and there are two adjacent shaft segments on each axial side of the radial reduction section. The diameter of the two shaft segments adjacent to the radial reduction section is greater than the minimum diameter of the radial reduction section.

2. The brake disc device according to claim 1, characterized in that, The fastening assembly further includes a sleeve fitted over the constricted section and extending to two shaft segments adjacent to the constricted section, the inner diameter of the sleeve matching the diameter of the two shaft segments adjacent to the constricted section.

3. The brake disc device according to claim 2, characterized in that, A first protrusion is formed on the disc hub, and a second protrusion is formed on the disc body. The brake disc device also includes a pressing member. The second protrusion is located between the pressing member and the first protrusion. The main body passes through the first protrusion, the second protrusion, and the pressing member. The first pressing member and the second pressing member press the first protrusion, the second protrusion, and the pressing member together.

4. The brake disc device according to claim 3, characterized in that, The constricted section includes a first constricted section, and the shaft section includes a first shaft section and a second shaft section adjacent to the first constricted section. The first shaft section and at least a portion of the first constricted section extend to the side of the first protrusion away from the second protrusion, and the first pressing portion is connected to the first shaft section.

5. The brake disc device according to claim 4, characterized in that, The sleeve includes a first sleeve, which is sleeved outside the first diameter reduction section and extends from the first diameter reduction section to the first shaft section and the second shaft section. The inner diameter of the first sleeve matches the diameter of the first shaft section and the diameter of the second shaft section. The first pressing part presses against the first protrusion through the first sleeve.

6. The brake disc device according to claim 4, characterized in that, The reduced diameter section includes a second reduced diameter section, and the shaft section includes a third shaft section and a fourth shaft section adjacent to the second reduced diameter section. The third shaft section and at least a portion of the second reduced diameter section extend to the side of the pressing member away from the second protrusion, and the second pressing member is connected to the third shaft section.

7. The brake disc device according to claim 6, characterized in that, The sleeve includes a second sleeve, which is sleeved outside the second diameter reduction section and extends from the second diameter reduction section to the third shaft section and the fourth shaft section. The diameter of the second sleeve matches the diameter of the third shaft section and the diameter of the fourth shaft section. The second pressing part presses against the pressing member through the second sleeve.

8. The brake disc device according to claim 7, characterized in that, The second pressing part is a nut, which is threadedly connected to the third shaft section.

9. The brake disc device according to claim 6, characterized in that, The constricted section further includes a third constricted section, which is located between the first constricted section and the second constricted section. The lengths of the first constricted section and the second constricted section are both less than the length of the third constricted section.

10. The brake disc device according to claim 1, characterized in that, The reduced diameter section includes an intermediate section and two connecting sections located on opposite sides of the intermediate section along its axial direction. The diameter of the connecting sections gradually increases in the direction away from the intermediate section along the axial direction of the fastening assembly.

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