Wheel-mounted brake disc, brake device and vehicle

Abstract

The application discloses a wheel-mounted brake disc, a brake device and a vehicle. The wheel-mounted brake disc comprises at least two annular brake disc bodies, the two brake disc bodies are arranged on two sides of a wheel along a circumferential direction of the wheel respectively, and each brake disc body has at least an annular contact surface and an annular brake surface opposite to the contact surface. The area of the brake surface is larger than that of the contact surface. In an assembled state of the brake disc body and the wheel, the brake surface is used for abutting against a side surface of the wheel, and the contact surface is used for contacting a friction member to generate a friction force when the vehicle brakes, so that the wheel is braked. The application solves the technical problem that the wheel-mounted brake disc is prone to deformation during use.

Description

Technical Field

[0001] This invention relates to the field of rail transit braking technology, and further to a wheeled brake disc, braking device and vehicle, particularly to a wheeled brake disc, braking device and vehicle suitable for braking systems of high-speed railway EMUs and urban rail transit vehicles. Background Technology

[0002] Of the existing vehicles, about half (high-speed trains, locomotives, urban rail vehicles, etc.) use wheel-mounted disc brakes for braking, such as Figure 1 , Figure 2 As shown, an existing wheel-mounted brake disc includes at least two annular disc bodies 20. Multiple through holes 1001 are spaced circumferentially on the wheel 10. Bolts 30 are respectively installed in the through holes 1001, with both ends of the bolts 30 located on opposite sides of the through holes 1001. The two disc bodies 20 are respectively positioned on opposite sides of the wheel 10, and bolt sleeves 40 and nuts 50 are respectively installed at both ends of the bolts 30, thereby pressing and fixing the two disc bodies 20 to the wheel 10, forming a braking friction pair on both sides of the wheel 10. When the vehicle is in motion, the disc bodies 20 are clamped by friction components, and the resulting friction force decelerates or brakes the vehicle. Figure 1 , Figure 3 As shown, the end face of the disc 20 near the wheel 10 is the heat dissipation surface 2001, while the end face away from the wheel 10 is the braking surface 2002. To ensure good heat dissipation and braking capability, a heat dissipation structure (such as multiple grooves or strip-shaped protrusions) is generally provided on the heat dissipation surface 2001, and the area of ​​the heat dissipation surface 2001 is smaller than the area of ​​the braking surface 2002. Since the braking device is an energy conversion medium for stopping or adjusting the speed of the vehicle, it plays a crucial role in the safe stopping of the vehicle.

[0003] Because the wheel-mounted brake disc absorbs frictional heat during operation (i.e., during vehicle movement), and forms a certain temperature gradient in the radial direction of the wheel 10, it generates thermal stresses of varying intensities in the radial direction of the wheel 10, causing the disc body 20 to experience... Figure 3 The deformation shown indicates that the area of ​​the disc 20 near the outer edge of the annulus shifts away from the wheel 10, while the area of ​​the disc 20 near the inner edge of the annulus remains more tightly attached to the wheel 10. This deformation of the disc 20 can lead to the following potential problems:

[0004] First, increasing the axial force on bolt 30 can easily cause fatigue and damage to bolt 30 during use, affecting the vehicle's braking ability and posing certain safety hazards.

[0005] Second, because the disc 20 is deformed, after the wheel 10 wears down to its limit and is scrapped, the disassembled disc 20 cannot be reused, which reduces the reuse rate of the disc 20 and increases the equipment cost.

[0006] There is currently no effective solution to the problem of wheel-mounted brake discs being prone to deformation during use in related technologies.

[0007] Therefore, based on years of experience and practice in related industries, the inventor proposes a wheel-mounted brake disc, braking device, and vehicle to overcome the shortcomings of the prior art. Summary of the Invention

[0008] The purpose of this invention is to provide a wheel-mounted brake disc, a braking device, and a vehicle, which effectively reduces the deformation of the brake disc body during use, extends the service life of the brake disc and the reusability of the disc body, and ensures the braking safety of the vehicle.

[0009] The objective of this invention can be achieved through the following methods:

[0010] This invention provides a wheel-mounted brake disc for braking a wheel 1, the wheel-mounted brake disc comprising:

[0011] At least two annular brake discs are provided, with the two brake discs respectively disposed on both sides of the wheel along the circumference of the wheel;

[0012] The brake disc body has at least an annular contact surface and an annular braking surface opposite to the contact surface. The area of ​​the contact surface is larger than the area of ​​the braking surface. When the brake disc body is assembled with the wheel, the contact surface is used to fit against the side of the wheel, and the braking surface is used to contact the friction element to generate friction force when the vehicle brakes, so as to brake the wheel.

[0013] In a preferred embodiment of the present invention, the brake disc body includes a contact portion, a braking portion, and a heat dissipation portion. The contact portion and the braking portion are both annular plate structures. The heat dissipation portion is connected between the contact portion and the braking portion. The contact surface is formed on the side of the contact portion away from the heat dissipation portion, and the braking surface is formed on the side of the braking portion away from the heat dissipation portion.

[0014] In a preferred embodiment of the present invention, the heat dissipation part includes a plurality of raised ribs, which are distributed at intervals along the circumference of the brake disc body, and heat dissipation channels are formed between adjacent raised ribs.

[0015] In a preferred embodiment of the present invention, the contact portion, the braking portion, and the heat dissipation portion are integrally formed.

[0016] In a preferred embodiment of the present invention, the thickness of the contact portion is less than the thickness of the braking portion in the axial direction of the brake disc body.

[0017] In a preferred embodiment of the present invention, the brake disc body is provided with a plurality of stepped holes, and the wheel is provided with a plurality of through holes;

[0018] Each of the multiple through holes is provided with a connector, and the two ends of the connector extend into the stepped holes on the brake disc body located on both sides of the wheel. The two ends of the connector are provided with a first locking member and a second locking member, and the first locking member and the second locking member press against the stepped positions located in the stepped holes on both sides of the wheel.

[0019] In a preferred embodiment of the present invention, a plurality of stepped holes are distributed at intervals along the circumference of the brake disc, a plurality of through holes are distributed at intervals along the circumference of the wheel, and the plurality of stepped holes are respectively positioned opposite to the corresponding through holes in the axial direction of the wheel.

[0020] In a preferred embodiment of the present invention, the connecting member is a bolt, and the first locking member and the second locking member are bolt sleeves and nuts respectively disposed at both ends of the bolt.

[0021] In a preferred embodiment of the present invention, the cross-section of the brake disc is trapezoidal or conical.

[0022] This invention provides a braking device, the braking device comprising:

[0023] The aforementioned wheel-mounted brake disc is mounted on a wheel;

[0024] A friction element that can contact the wheel-mounted brake disc and generate friction to brake the wheel.

[0025] In a preferred embodiment of the present invention, the friction element is at least two friction plates, which are respectively disposed on both sides of the wheel-mounted brake disc. The two friction plates are controlled to press against the wheel-mounted brake disc and contact the corresponding brake disc body to generate friction.

[0026] The present invention provides a vehicle having the aforementioned wheel-mounted brake discs, which are disposed on the wheels to brake the wheels.

[0027] As described above, the features and advantages of the wheel-mounted brake disc, braking device, and vehicle of the present invention are as follows: Annular brake disc bodies are respectively arranged on both sides of the wheel along the circumference of the wheel. Each brake disc body has at least a contact surface and a braking surface opposite to the contact surface. When the brake disc body is assembled with the wheel, the contact surface can fit against the side of the wheel. When the braking surface is used for vehicle braking, it contacts the friction element to generate friction, thereby braking the wheel. Since the area of ​​the contact surface of the brake disc body is larger than the area of ​​the braking surface, the deformation resistance of the braking surface is greater than that of the contact surface. Simultaneously, when the friction element presses against the brake disc body for friction braking, the contact surface can provide better support for the braking surface, further reducing the possibility of brake disc body deformation. Therefore, the present invention can effectively reduce the deformation of the brake disc body during use, extend the service life and reusability of the wheel-mounted brake disc, and ensure vehicle braking safety. Attached Figure Description

[0028] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

[0029] Figure 1 : A partial cross-sectional view of a wheel-mounted brake disc in the prior art.

[0030] Figure 2 : A front view of a wheel-mounted brake disc in the prior art.

[0031] Figure 3 This is a schematic diagram of the structure of a wheeled brake disc after deformation in the prior art.

[0032] Figure 4 This is one of the partial cross-sectional views of the wheel-mounted brake disc installed on the wheel according to the present invention.

[0033] Figure 5 This is a second partial cross-sectional view of the wheel-mounted brake disc of the present invention installed on the wheel.

[0034] Figure 6 : This is a perspective view of the wheel-mounted brake disc of the present invention.

[0035] Figure 7 This is one of the partial cross-sectional views of the wheel-mounted brake disc of the present invention.

[0036] Figure 8 This is a second partial cross-sectional view of the wheel-mounted brake disc of the present invention.

[0037] The reference numerals in the background art are:

[0038] 10. Wheel; 1001. Through hole;

[0039] 20. Disk body; 2001. Heat dissipation surface;

[0040] 2002, Braking surface; 30, Bolt;

[0041] 40. Bolt sleeve; 50. Nut.

[0042] The reference numerals in the accompanying drawings of this invention are:

[0043] 1. Wheel; 101. Through hole;

[0044] 2. Brake disc body; 201. Contact surface;

[0045] 202. Braking surface; 203. Stepped hole;

[0046] 204. Contact part; 205. Braking part;

[0047] 206. Heat dissipation section; 2061. Raised rib;

[0048] 2062. Heat dissipation channels; 3. Connecting components;

[0049] 4. First locking component; 5. Second locking component. Detailed Implementation

[0050] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0051] Implementation Method 1

[0052] like Figures 4 to 8 As shown, the present invention provides a wheel-mounted brake disc for braking a wheel 1. The wheel-mounted brake disc includes at least two annular brake disc bodies 2, which are respectively disposed on both sides of the wheel 1 along its circumference. Each brake disc body 2 has at least a contact surface 201 and a braking surface 202 opposite to the contact surface 201. Both the contact surface 201 and the braking surface 202 are annular. The area of ​​the contact surface 201 is larger than the area of ​​the braking surface 202. When the brake disc body 2 is assembled with the wheel 1, the contact surface 201 is used to conform to the side of the wheel 1, and the braking surface 2 is used to contact friction components during vehicle braking to generate friction force, thereby braking the wheel 1.

[0053] In this invention, annular brake disc bodies 2 are respectively provided on both sides of the wheel 1 along the circumference of the wheel 1. The brake disc body 2 has at least a contact surface 201 and a braking surface 202. When the brake disc body 2 is assembled with the wheel 1, the contact surface 201 can fit against the side of the wheel 1. The braking surface 202 is used to generate friction force by contacting the friction component when the vehicle is braking, thereby braking the wheel 1. Since the area of ​​the contact surface 201 of the brake disc body 2 is larger than the area of ​​the braking surface 202, the deformation resistance of the braking surface 202 is greater than that of the contact surface 201. At the same time, when the friction component presses the brake disc body 2 to perform friction braking, the contact surface 201 can provide better support for the braking surface 202, further reducing the possibility of deformation of the brake disc body 2. Thus, this invention can effectively reduce the deformation of the brake disc body 2 during use, extend the service life and reuse rate of the wheel-mounted brake disc, and ensure the braking safety of the vehicle.

[0054] Furthermore, the friction element consists of at least two friction pads, which are respectively disposed on both sides of the wheel-mounted brake disc. The two friction pads are controlled to press against the wheel-mounted brake disc and contact the brake surface 202 of the corresponding brake disc body 2 to generate friction force, thereby achieving the purpose of vehicle braking.

[0055] In an optional embodiment of the present invention, such as Figures 5 to 8 The brake disc body 2 includes a contact portion 204, a braking portion 205, and a heat dissipation portion 206. Both the contact portion 204 and the braking portion 205 have annular plate-like structures. The heat dissipation portion 206 is connected between the contact portion 204 and the braking portion 205 and has an annular structure. The wall surface of the contact portion 204 away from the heat dissipation portion 206 forms a contact surface 201, and the wall surface of the braking portion 205 away from the heat dissipation portion 206 forms a braking surface 202.

[0056] Specifically, such as Figures 6 to 8 As shown, the heat dissipation part 206 includes multiple ribs 2061, which are distributed circumferentially along the brake disc body 2 to form heat dissipation channels 2062 between any two adjacent ribs 2061. While ensuring the overall strength and resistance to deformation, the heat generated during braking is quickly dissipated, ensuring that the brake disc has good heat dissipation capacity.

[0057] Furthermore, the contact portion 204, braking portion 205, and heat dissipation portion 206 are integrally cast, and the cross-section of the brake disc body 2 is trapezoidal or conical. In this embodiment of the invention, the integrally cast structure enhances the overall deformation resistance of the brake disc body 2; in addition, placing the heat dissipation portion 206 between the contact portion 204 and the braking portion 205 also enhances the deformation resistance of the heat dissipation portion 206, solving the problem of easy deformation of the heat dissipation portion 206, thereby enhancing the overall deformation resistance of the brake disc body 2. Since the contact portion 204, braking portion 205, and heat dissipation portion 206 are integrally cast, the problem of low yield in the casting process of wheel brake discs can be solved when the same material as that of traditional wheel brake discs can be selected. After casting, it can still ensure small deformation after long-term use, and the deformation that occurs can be corrected by machining to achieve the purpose of reusability of wheel brake discs.

[0058] In an optional embodiment of the present invention, such as Figure 5 As shown, in the axial direction of the brake disc body 2, the thickness of the contact portion 204 is less than the thickness of the braking portion 205. Since the braking portion 205 needs to perform friction braking with the friction element, it is necessary to ensure that the thickness of the braking portion 205 is greater than the thickness of the contact portion 204 to guarantee the long-term, stable braking capability of the brake disc body 2. In actual production, a portion of the original brake disc body 2 located on one side of the braking portion 205 can be moved to the opposite side of the brake disc body 2 to form the contact portion 204. This allows the structure of the contact portion 204, braking portion 205, and heat dissipation portion 206 of this invention to be formed without increasing the weight and cost of the brake disc body 2.

[0059] Furthermore, such as Figure 5 As shown, the ratio of the thickness H1 of the braking part 205 to the thickness H2 of the contact part 204 is H1 / H2 = (2.3~1.8). Furthermore, in the radial direction of the brake disc body 2, the width L2 of the contact part 204 and the width L1 of the braking part 205 satisfy the following relationship: L2 = (1.1~1.3) × L1; the overall thickness H of the brake disc body 2 and the thickness H1 of the braking part 205 satisfy the following relationship: H = (3.0~3.5) × H1. By limiting the above dimensions, the heat dissipation part 206 can be reasonably arranged while satisfying the installation of wheel 1, ensuring good heat dissipation and ventilation effect; the ratio range of the thickness H1 of the braking part 205 to the thickness H2 of the contact part 204 is set, and the width L2 of the contact part 204 is limited to be greater than the width L1 of the braking part 205, so that the overall parameters of the brake disc body 2 on the side near wheel 1 are more coordinated and uniform, reducing deformation, improving the deformation of the brake disc body 2 caused by thermal expansion, and improving the safety and reliability of the brake disc body 2 in use as a whole.

[0060] Preferably, the ratio of the thickness H1 of the braking part 205 to the thickness H2 of the contact part 204 is H1 / H2=2:1; the width L2 of the contact part 204 and the width L1 of the braking part 205 satisfy the relationship: L2=1.2×L1; the overall thickness H of the brake disc body 2 and the thickness H1 of the braking part 205 satisfy the relationship: H=3.5×H1.

[0061] In an optional embodiment of the present invention, such as Figures 4 to 8 As shown, the brake disc body 2 has multiple stepped holes 203, and the wheel 1 has multiple through holes 101. Connectors 3 are respectively installed in the through holes 101. Both ends of the connectors 3 extend into the stepped holes 203 on the brake disc body 2 located on both sides of the wheel 1. One end of the connector 3 is provided with a first locking member 4, and the other end is provided with a second locking member 5. The first locking member 4 and the second locking member 5 respectively press against the stepped positions in the stepped holes 203 on both sides of the wheel 1, thus securely mounting the brake disc body 2 onto the wheel 1. The connector 3 can be, but is not limited to, a bolt; the first locking member 4 can be, but is not limited to, a bolt sleeve fixed to one end of the bolt; and the second locking member 5 can be, but is not limited to, a nut screwed onto the other end of the bolt.

[0062] Furthermore, such as Figures 6 to 8 As shown, multiple stepped holes 203 are spaced apart and evenly distributed along the circumference of the brake disc body 2, and multiple through holes 101 are spaced apart and evenly distributed along the circumference of the wheel 1. The multiple stepped holes 203 and the corresponding through holes 101 are respectively positioned opposite each other in the axial direction of the wheel 1, so that the connecting piece 3 can smoothly pass through the stepped holes 203 on the brake disc body 2 and the through holes 101 on the wheel 1.

[0063] The features and advantages of the wheel-mounted brake disc of the present invention are:

[0064] 1. The wheel-mounted brake disc has a braking surface 202 and a contact surface 201. The deformation resistance of the braking surface 202 is greater than that of the contact surface 201. At the same time, when the friction element presses the brake disc body 2 for friction braking, the contact surface 201 can provide better support for the braking surface 202, further reducing the possibility of deformation of the brake disc body 2. Thus, the present invention can effectively reduce the deformation of the brake disc body 2 during use, extend the service life and reusability of the wheel-mounted brake disc, and ensure the braking safety of the vehicle.

[0065] Second, since the wheel-mounted brake disc can effectively reduce the deformation of the brake disc body 2 during use, it can greatly reduce the additional bolt axial force caused by the deformation of the brake disc body 2 (i.e., the increase in axial force caused by the deformation of the connecting piece 3), and extend the service life of the bolts.

[0066] Third, the wheel-mounted brake disc can enhance the overall deformation resistance of the brake disc body 2 through its one-piece molding structure; in addition, the heat dissipation part 206 is set between the contact part 204 and the braking part 205, which can also enhance the deformation resistance of the heat dissipation part 206, solve the problem of the heat dissipation part 206 being easy to deform, and thus enhance the overall deformation resistance of the brake disc body 2.

[0067] Fourth, this wheel-mounted brake disc can form a structure of contact part 204, braking part 205 and heat dissipation part 206 without increasing the weight and cost of the brake disc body 2.

[0068] Implementation Method 2

[0069] The present invention provides a braking device, which includes the aforementioned wheel-mounted brake disc and friction element. The wheel-mounted brake disc is disposed on the wheel 1, and the friction element can contact the wheel-mounted brake disc and generate friction force to brake the wheel 1.

[0070] Specifically, the friction element consists of at least two friction pads, which are respectively disposed on both sides of the wheel-mounted brake disc. The two friction pads are controlled to press against the wheel-mounted brake disc and contact the corresponding brake disc body 2 to generate friction.

[0071] The braking device of the present invention has the same advantages as the wheel-mounted brake disc described above, which will not be repeated here.

[0072] Implementation Method 3

[0073] The present invention provides a vehicle having the aforementioned wheel-mounted brake disc, which is disposed on the wheel 1 to brake the wheel 1.

[0074] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A wheel-mounted brake disc for braking wheels, characterized in that, The wheel-mounted brake disc includes: At least two annular brake discs are provided, with the two brake discs respectively disposed on both sides of the wheel along the circumference of the wheel; The brake disc body has at least an annular contact surface and an annular braking surface opposite to the contact surface. The area of ​​the contact surface is larger than the area of ​​the braking surface. When the brake disc body is assembled with the wheel, the contact surface is used to fit against the side of the wheel, and the braking surface is used to contact the friction component to generate friction force when the vehicle brakes, so as to brake the wheel. The brake disc body includes a contact portion, a braking portion, and a heat dissipation portion. The contact portion and the braking portion are both ring-shaped plate structures. The heat dissipation portion is connected between the contact portion and the braking portion. The contact surface is formed on the side of the contact portion away from the heat dissipation portion, and the braking surface is formed on the side of the braking portion away from the heat dissipation portion.

2. The wheel-mounted brake disc as described in claim 1, characterized in that, The heat dissipation section includes multiple ribs, which are distributed at intervals along the circumference of the brake disc body, forming heat dissipation channels between adjacent ribs.

3. The wheel-mounted brake disc as described in claim 1 or 2, characterized in that, The contact portion, the braking portion, and the heat dissipation portion are integrally formed.

4. The wheel-mounted brake disc as described in claim 1, characterized in that, In the axial direction of the brake disc, the thickness of the contact portion is less than the thickness of the brake portion.

5. The wheel-mounted brake disc as described in claim 1, characterized in that, The brake disc body has multiple stepped holes, and the wheel has multiple through holes; Each of the multiple through holes is provided with a connector, and the two ends of the connector extend into the stepped holes on the brake disc body located on both sides of the wheel. The two ends of the connector are provided with a first locking member and a second locking member, and the first locking member and the second locking member press against the stepped positions located in the stepped holes on both sides of the wheel.

6. The wheel-mounted brake disc as described in claim 5, characterized in that, The plurality of stepped holes are distributed circumferentially along the brake disc body, and the plurality of through holes are distributed circumferentially along the wheel, with the plurality of stepped holes and the corresponding through holes respectively positioned opposite each other on the axial direction of the wheel.

7. The wheel-mounted brake disc as described in claim 5 or 6, characterized in that, The connecting component is a bolt, and the first locking component and the second locking component are bolt sleeves and nuts respectively disposed at both ends of the bolt.

8. The wheel-mounted brake disc as described in claim 1, characterized in that, The cross-section of the brake disc is trapezoidal or conical.

9. A braking device, characterized in that, The braking device includes: The wheel-mounted brake disc according to any one of claims 1 to 8, wherein the wheel-mounted brake disc is disposed on a wheel; A friction element that can contact the wheel-mounted brake disc and generate friction to brake the wheel.

10. The braking device as claimed in claim 9, characterized in that, The friction element consists of at least two friction pads, which are respectively disposed on both sides of the wheel-mounted brake disc. The two friction pads are controlled to press against the wheel-mounted brake disc and contact the corresponding brake disc body to generate friction.

11. A vehicle, characterized in that, The vehicle has a wheel-mounted brake disc as described in any one of claims 1 to 8, the wheel-mounted brake disc being disposed on the wheel for braking the wheel.

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