CN221195842U - Automobile carbon ceramic brake disc - Google Patents
Automobile carbon ceramic brake disc Download PDFInfo
- Publication number
- CN221195842U CN221195842U CN202322844496.8U CN202322844496U CN221195842U CN 221195842 U CN221195842 U CN 221195842U CN 202322844496 U CN202322844496 U CN 202322844496U CN 221195842 U CN221195842 U CN 221195842U
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- brake disc
- vent holes
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- holes
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 29
- 239000000919 ceramic Substances 0.000 title claims abstract description 27
- 238000009423 ventilation Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000017525 heat dissipation Effects 0.000 claims abstract description 9
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
A car carbon ceramic brake disk, the heat-dissipating structure of the brake disk is made up of friction surface, ventilating slot and ventilating hole. The friction surface material is consistent with the carbon ceramic material of the matrix material; the groove walls at two sides of the ventilation groove are inclined planes, and the air inlet is designed in a large-inlet small-outlet manner; the ventilation holes are spirally distributed on the surface of the brake disc, are opposite to the air flow direction during braking, and ensure that each ventilation hole is communicated with the ventilation groove. The invention improves the effective heat dissipation area in the braking process by 10-15%, and improves the air flow velocity in the ventilation groove by 30-40% during braking, so that the brake disc has better heat dissipation effect. According to the invention, the high-temperature-resistant carbon-carbon material is adopted as the connecting material of the carbon ceramic brake disc and the metal joint, the bolt is connected in an anti-shearing structure, and the sleeve is free of the joint and is in direct contact with the carbon ceramic brake disc, so that the structural stability is better realized, the bearing capacity of the connecting hole of the brake disc is improved by 15-20%, the defects of fester, cracks and the like caused by stress concentration of the connecting hole in the braking process are avoided, and the service life of the product is prolonged.
Description
Technical Field
The invention relates to the technical field of automobile brake disc manufacturing, in particular to a carbon ceramic automobile brake disc and a design method thereof.
Background
With the continuous development of economy and science and technology, the problem of road traffic safety is solved, so that higher quality requirements are put forward for the automobile brake disc. When the automobile brakes, the friction force between the brake disc and the brake pad is used for controlling the speed reduction and the stopping of the automobile, and in the whole process, the brake disc is a main carrier for bearing braking torque, so that the structural stability of the brake disc is critical, and the service life and the service performance of the brake disc can be directly determined by good heat resistance, so that the heat failure phenomena such as surface cracking and the like of the traditional cast iron brake disc are solved, the safety performance of the automobile is improved, and a new design method of the automobile brake disc is required to be provided, and the heat resistance, the structural stability and the friction stability of the automobile brake disc are improved.
In recent years, more and more methods are developed for research on a carbon/ceramic automobile brake disc, such as a split-type carbon ceramic brake disc in patent CN210510043U for structural design of the automobile brake disc, and although the cooling effect of the brake disc is improved, rivet holes are formed on the surface of the brake disc, and rivets are distributed on the surface of the brake disc in the later period, so that the brake disc is easy to corrode in a humid environment, and the service life of the product is reduced.
Disclosure of Invention
The invention provides an automobile carbon ceramic brake disc and a design method thereof, which are used for overcoming the defects of unstable structure and hot crack occurrence caused by low heat dissipation efficiency when the automobile carbon ceramic brake disc is braked in the prior art.
The invention comprises a brake disc body, a joint, a connecting bolt and a sleeve. The closing head is fixedly connected to the closing head mounting surface of the brake disc body. And each U-shaped through hole on the closing flange of the closing head is aligned with the closing head connecting screw hole on the brake disc body respectively, and the U-shaped through holes and the closing head connecting screw hole are fixedly connected through connecting bolts. The sleeve is sleeved on the connecting bolt, and the sleeve is positioned on one side of the joint mounting surface of the brake disc body.
A small sleeve is arranged on the outer circumferential surface of the sleeve, and a gap is formed between the inner end surface of the joint and the end surface of the brake disc body through a spigot of the end head of the small sleeve; the gap is a heat dissipation channel of the brake disc body in the braking process. A gasket and a fastening nut are arranged at the other end of the connecting bolt.
The disc surface of the closing head is provided with a groove, and the outer edge of the closing head is a closing flange for connecting the brake disc. 10U-shaped through holes for installing the sleeve are uniformly distributed on the outer circumferential surface of the joint flange, and the inner cavity of the U-shaped through holes is identical to the small sleeve in external dimension and is in clearance fit with the small sleeve. The opening of each U-shaped through hole is provided with a positioning spigot of a small sleeve. The depth of the groove of the closing disc is 1/2 of the axial height of the friction plate in the caliper assembled with the groove. The center of the groove of the closing disc surface is provided with a through hole for connecting with an automobile hub.
A plurality of vent holes with the aperture of 5-8 mm are uniformly distributed on the disc surface of the brake disc body, and a plurality of vent grooves which are radially communicated are uniformly distributed on the circumference of the brake disc body; ribs are formed between the ventilation grooves. The number of the ventilation holes is twice the number of the ventilation grooves
The plurality of vent holes are equally divided into four groups, namely a first group of vent holes, a second group of vent holes, a third group of vent holes and a fourth group of vent holes. The radius of each vent hole in the same group is gradually decreased by 5mm within the range of 180 degrees of the disc surface of the brake disc body, and a plurality of vent holes are spirally arranged anticlockwise on the surface of the brake disc body. The starting point of each group of vent holes is close to the outer edge of the surface of the brake disc body, and the included angle between two adjacent groups of vent holes is 90 degrees. The distance between the centers of the vent holes positioned at the outer edge of each group of vent holes and the outer edge is 8mm, and the distance between the centers of the vent holes positioned at the inner edge and the inner edge is 10mm.
The vent holes close to the outer edge of the brake disc body in the first group of vent holes are located in the 12-point direction, and the vent holes close to the inner edge of the brake disc body are located in the 6-point direction; the vent holes close to the outer edge of the brake disc body in the second group of vent holes are located in the 9-point direction, and the vent holes close to the inner edge of the brake disc body are located in the 3-point direction; the vent holes close to the outer edge of the brake disc body in the third group of vent holes are positioned in the 6-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 12-point direction; and the vent holes close to the outer edge of the brake disc body in the fourth group of vent holes are positioned in the 3-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 9-point direction.
Each ventilation hole is communicated with each ventilation groove.
And each two of the plurality of ventilation grooves are in a group, and each group of ventilation grooves is respectively positioned between two key platforms 11 on the inner circumferential surface of the brake disc body. The two side groove walls of the ventilation groove are inclined planes, and the included angle alpha between the two side groove walls is 12 degrees.
The ribs are provided with long ribs and short ribs, the long ribs and the short ribs are arranged at intervals, and the circumferences of the outer sides of the circumferences of the brake discs are equal. Wherein the inner diameter of the short rib is the same as the inner diameter of the brake disc, the inner diameter of the long rib is 15mm larger than the inner diameter of the brake disc, and the key table 11 is formed by the long portion. The key table is provided with a joint connecting screw hole.
The invention has two main technical characteristics: 1. the heat radiation structure of the brake disc consists of a friction surface, a ventilation groove and ventilation holes. The friction surface material is consistent with the carbon ceramic material of the matrix material; the groove walls at two sides of the ventilation groove are inclined planes, and the air inlet is designed in a large-inlet small-outlet manner; the ventilation holes are spirally distributed on the surface of the brake disc, are opposite to the air flow direction during braking, and ensure that each ventilation hole is communicated with the ventilation groove. The design improves the effective heat dissipation area in the braking process by 10-15%, and improves the air flow velocity in the ventilation groove by 30-40% during braking, so that the brake disc has better heat dissipation effect; 2. the high-temperature-resistant carbon-carbon material is adopted as the connecting material of the carbon ceramic brake disc and the metal joint, the structural design of the bolt shearing force resistance is adopted as the connecting part, and the sleeve is introduced, so that the joint is prevented from being in direct contact with the carbon ceramic brake disc, the structural stability is better realized, the bearing capacity of the connecting hole of the brake disc is improved by 15-20%, and the defects of festering, cracking and the like caused by stress concentration of the connecting hole in the braking process are avoided.
The invention adopts the design of the anti-shearing force structure among the connecting fasteners, can obviously reduce the stress concentration at the screw holes of the key table of the brake disc, and improves the service life of the product, as shown in figure 12.
As can be seen from simulation and calculation and comparison between the distribution graph 13 of the air flow velocity and the flow velocity of a group of air channels of a brake disc when the ventilating slot of the invention and a certain brand of automobile ventilating slot are braked, the structure of the invention improves the effective heat dissipation area in the braking process by 10-15% and improves the air flow velocity in the ventilating slot by 30-40%.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a rear view of fig. 1.
Fig. 4 is a cross-sectional view taken along A-A in fig. 1.
Fig. 5 is a partial enlarged view of the portion a in fig. 2.
Fig. 6 is a front view of the brake disc body.
Fig. 7 is a rear view of fig. 4.
Fig. 8 is a cross-sectional view of fig. 4.
Fig. 9 is a front view of the closing head.
Fig. 10 is a cross-sectional view of fig. 9.
Fig. 11 is a rear view of fig. 9.
Fig. 12 is a graph comparing the topographical effects of the inventive disc shown in fig. 7a with the prior art disc shown in fig. 7 b.
FIG. 12 is an air velocity profile of the brake at 80 km/h; wherein the car carbon ceramic brake disc of the present invention is shown in fig. 12a, and the car carbon ceramic brake disc of a certain brand of the prior art is shown in fig. 12 b.
Fig. 13 is a graph comparing flow rates of air channels of a brand of automotive carbon ceramic brake disc obtained by the invention and the prior art, respectively, wherein,
FIG. 14 is a graph of a comparison of air duct flow rates for a brand of automotive carbon ceramic brake disc using the present invention and the prior art, respectively.
In the figure: 1. a brake disc body; 2. a vent hole; 3. a ventilation groove; 4. hub connection holes; 5. closing the head; 6. a connecting bolt; 7. a sleeve; 8. a small sleeve; 9. a gasket; 10. a nut; 11. a key pad; 12. ribs; u-shaped through holes; 14. the air duct flow velocity curve of the invention; 15. an air duct flow velocity curve in the prior art; 16. a group of air channels.
Detailed Description
The invention relates to an automobile carbon ceramic brake disc, which comprises a brake disc body 1, a joint 5 and a sleeve 7. The joint is positioned on the joint mounting surface of the brake disc body and fixedly connected with the brake disc body through a connecting bolt. The connecting bolts are arranged in hub connecting holes 4 on the brake disc body. Each U-shaped through hole on the closing flange of the closing head is aligned with the closing head connecting screw hole on the brake disc body respectively, and the U-shaped through holes and the closing head connecting screw hole are fixedly connected through the connecting bolt 6. The connecting bolt is sleeved with a sleeve 7, and the sleeve is positioned on one side of the joint mounting surface of the brake disc body.
A small sleeve 8 is arranged on the outer circumferential surface of the sleeve 7, and a gap is formed between the inner end surface of the joint and the end surface of the brake disc body through a spigot of the end head of the small sleeve; the gap is a heat dissipation channel of the brake disc body in the braking process. A washer 9 and a fastening nut 10 are mounted at the other end of the connecting bolt.
The joint is made of aluminum alloy or stainless steel and is in a disc shape with equal thickness. The disc surface of the joint is punched into a groove, and the outer edge of the joint is a joint flange for connecting the brake disc. The outer diameter of the closing flange is the same as the inner diameter of the brake disc body. 10U-shaped through holes for installing the sleeve are uniformly distributed on the outer circumferential surface of the joint flange, and the inner cavity of the U-shaped through holes is identical to the small sleeve in external dimension and is in clearance fit with the small sleeve. The opening of each U-shaped through hole is provided with a positioning spigot of a small sleeve. The depth of the groove of the closing disc is 1/2 of the axial height of the friction plate in the caliper assembled with the groove. The center of the groove of the closing disc surface is provided with a through hole for connecting with an automobile hub.
A plurality of ventilation holes 2 are uniformly distributed on the disc surface of the brake disc body 1, and a plurality of ventilation grooves 3 which are radially communicated are uniformly distributed on the circumference of the brake disc body; ribs 12 are formed between the ventilation slots. The number of the ventilation holes is twice the number of the ventilation grooves. In this embodiment, the number of ventilation holes is 40, and the ventilation holes are equally divided into four groups, namely a first group of ventilation holes, a second group of ventilation holes, a third group of ventilation holes and a fourth group of ventilation holes.
The radius of each vent hole in the same group is gradually decreased by 5mm within the range of 180 degrees of the disc surface of the brake disc body, and a plurality of vent holes are spirally arranged anticlockwise on the surface of the brake disc body. The starting point of each group of vent holes is close to the outer edge of the surface of the brake disc body, and the included angle between two adjacent groups of vent holes is 90 degrees. The distance between the centers of the vent holes positioned at the outer edge of each group of vent holes and the outer edge is 8mm, and the distance between the centers of the vent holes positioned at the inner edge and the inner edge is 10mm. In this embodiment, the vent holes near the outer edge of the brake disc body in the first set of vent holes are located in the 12-point direction, and the vent holes near the inner edge of the brake disc body are located in the 6-point direction; the vent holes close to the outer edge of the brake disc body in the second group of vent holes are located in the 9-point direction, and the vent holes close to the inner edge of the brake disc body are located in the 3-point direction; the vent holes close to the outer edge of the brake disc body in the third group of vent holes are positioned in the 6-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 12-point direction; and the vent holes close to the outer edge of the brake disc body in the fourth group of vent holes are positioned in the 3-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 9-point direction.
The aperture of the vent hole is 5-8 mm.
Each ventilation hole is communicated with each ventilation groove. And each two of the plurality of ventilation grooves are in a group, and each group of ventilation grooves is respectively positioned between two key platforms 11 on the inner circumferential surface of the brake disc body. The two side groove walls of the ventilation groove are inclined planes, and the included angle alpha between the two side groove walls is 12 degrees.
The ribs are provided with long ribs and short ribs, the long ribs and the short ribs are arranged at intervals, and the circumferences of the outer sides of the circumferences of the brake discs are equal. Wherein the inner diameter of the short rib is the same as the inner diameter of the brake disc, the inner diameter of the long rib is 15mm larger than the inner diameter of the brake disc, and the key table 11 is formed by the long portion. The key table is provided with a joint connecting screw hole.
The connecting fastener used for the automobile carbon ceramic brake disc comprises a connecting bolt 6, a sleeve 7, a small sleeve 8, a gasket 9 and a nut 10, and all adopt high-temperature-resistant carbon-carbon materials.
Claims (9)
1. The automobile carbon ceramic brake disc is characterized by comprising a brake disc body (1), a joint (5), a connecting bolt (6) and a sleeve (7); the closing head is fixedly connected to a closing head mounting surface of the brake disc body; each U-shaped through hole on the closing flange of the closing head is aligned with a closing head connecting screw hole on the brake disc body respectively, and the U-shaped through holes and the closing head connecting screw holes are fixedly connected through a connecting bolt (6); the sleeve (7) is sleeved on the connecting bolt, and the sleeve is positioned on one side of the joint mounting surface of the brake disc body.
2. The car carbon ceramic brake disc according to claim 1, characterized in that a small sleeve (8) is mounted on the outer circumferential surface of the sleeve (7), and a gap is formed between the inner end face of the joint and the end face of the brake disc body through a spigot of the small sleeve end; the gap is a heat dissipation channel of the brake disc body in the braking process.
3. The car carbon ceramic brake disc according to claim 1, characterized in that the disc surface of the joint (5) is provided with a groove, and the outer edge is a joint flange for connecting the brake disc; 10U-shaped through holes for installing the sleeve are uniformly distributed on the outer circumferential surface of the closed flange, the outer dimensions of the inner cavity of the U-shaped through holes are the same as those of the small sleeve (8), and the inner cavity of the U-shaped through holes is in clearance fit with the small sleeve (8); positioning rabbets of small sleeves are arranged at the orifices of the U-shaped through holes; the depth of the groove of the closed-end disc is 1/2 of the axial height of a friction plate in the caliper assembled with the groove; the center of the groove of the closing disc surface is provided with a through hole for connecting with an automobile hub.
4. The car carbon ceramic brake disc according to claim 1, characterized in that a plurality of vent holes (2) with the aperture of 5-8 mm are uniformly distributed on the disc surface of the brake disc body (1), and a plurality of vent grooves 3 which are radially communicated are uniformly distributed on the circumference of the brake disc body; ribs (12) are formed between the ventilation grooves; the number of the ventilation holes is twice the number of the ventilation grooves.
5. The car carbon ceramic brake disk according to claim 4, wherein the plurality of vent holes (2) are equally divided into four groups of vent holes, namely a first group of vent holes, a second group of vent holes, a third group of vent holes and a fourth group of vent holes; the radius of each vent hole in the same group is gradually decreased by 5mm in turn, and a plurality of vent holes are spirally arranged anticlockwise on the surface of the brake disc body; the starting point of each group of vent holes is close to the outer edge of the surface of the brake disc body, and the included angle between two adjacent groups of vent holes is 90 degrees; the distance between the centers of the vent holes positioned at the outer edge of each group of vent holes and the outer edge is 8mm, and the distance between the centers of the vent holes positioned at the inner edge and the inner edge is 10mm.
6. The car carbon ceramic brake disk of claim 5, wherein the vent holes near the outer edge of the brake disk body in the first set of vent holes are located in the 12-point direction, and the vent holes near the inner edge of the brake disk body are located in the 6-point direction; the vent holes close to the outer edge of the brake disc body in the second group of vent holes are located in the 9-point direction, and the vent holes close to the inner edge of the brake disc body are located in the 3-point direction; the vent holes close to the outer edge of the brake disc body in the third group of vent holes are positioned in the 6-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 12-point direction; and the vent holes close to the outer edge of the brake disc body in the fourth group of vent holes are positioned in the 3-point direction, and the vent holes close to the inner edge of the brake disc body are positioned in the 9-point direction.
7. The automotive carbon ceramic brake disk of claim 4, wherein each of said vent holes is respectively continuous with each of said vent grooves.
8. The car carbon ceramic brake disc according to claim 4, wherein each of the plurality of ventilation slots is a group, and each group of ventilation slots is located between two key steps (11) on the inner circumferential surface of the brake disc body;
The two side groove walls of the ventilation groove are inclined planes, and the included angle alpha between the two side groove walls is 12 degrees.
9. The car carbon ceramic brake disk according to claim 4, wherein each rib (12) has long ribs and short ribs, and the long ribs and the short ribs are arranged at intervals, and the circumferences of the outer sides of the circumferences of the brake disk are equal; wherein the method comprises the steps of
The inner diameter of the short rib is the same as the inner diameter of the brake disc, the inner diameter of the long rib is 15mm larger than the inner diameter of the brake disc, and a key table (11) is formed by the long part; the key table is provided with a joint connecting screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322844496.8U CN221195842U (en) | 2023-10-23 | 2023-10-23 | Automobile carbon ceramic brake disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322844496.8U CN221195842U (en) | 2023-10-23 | 2023-10-23 | Automobile carbon ceramic brake disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221195842U true CN221195842U (en) | 2024-06-21 |
Family
ID=91514006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322844496.8U Active CN221195842U (en) | 2023-10-23 | 2023-10-23 | Automobile carbon ceramic brake disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221195842U (en) |
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2023
- 2023-10-23 CN CN202322844496.8U patent/CN221195842U/en active Active
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