CN215059046U

CN215059046U - Brake disc, brake and vehicle of vehicle

Info

Publication number: CN215059046U
Application number: CN202022806064.4U
Authority: CN
Inventors: 周锦泉; 陈金昶
Original assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Current assignee: BYD Co Ltd; Huizhou BYD Battery Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-12-07
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a brake disc, a brake and a vehicle of a vehicle, wherein the brake disc comprises a connecting part and a braking part, and the connecting part is connected with a hub bearing; braking portion links to each other with connecting portion, and braking portion and braking piece are stopped to or are separated, be equipped with in the braking portion with the ventilation chamber of external environment intercommunication, in the axial direction of braking disk, the interval between the relative lateral wall of braking portion is the thickness interval, and the interval between the relative lateral wall in ventilation chamber is the ventilation interval, and in the radial direction of braking portion, thickness interval and/or ventilation interval change. The utility model discloses a brake disc of vehicle changes through thickness interval and/or ventilation interval for braking portion possesses better temperature field and stress field, and in the braking process, the temperature gradient that the brake disc appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability is better, is difficult for appearing thermoelastic instability, and then the brake performance of vehicle is more stable, reliable.

Description

Brake disc, brake and vehicle of vehicle

Technical Field

The utility model belongs to the technical field of the vehicle technique and specifically relates to a brake disc, stopper and vehicle of vehicle are related to.

Background

In the field of vehicle technology, vehicle braking systems generally employ brake discs of equal thickness. In the actual braking process, because the brake disc is affected by the stress field and the temperature field, thermoelastic instability and high temperature points (or "hot spots") are more easily generated in the effective friction surface area, which may cause thermal deformation, thermal cracks, thermal vibration, noise, and the like of the brake disc.

SUMMERY OF THE UTILITY MODEL

The utility model provides a brake disc of vehicle, the brake disc has that thermal stability is good, brake performance is reliable's advantage.

The utility model provides a brake, brake has as above the brake disc of vehicle.

The utility model provides a vehicle, the vehicle has as above the stopper.

According to the utility model discloses brake disc of vehicle, the vehicle includes braking piece and wheel hub bearing, the brake disc includes connecting portion and braking portion, the connecting portion with wheel hub bearing links to each other; the braking portion is connected with the connecting portion, the braking portion is abutted to or separated from the brake pad, a ventilation cavity communicated with an external environment is arranged in the braking portion, the distance between the opposite outer side walls of the braking portion is a thickness distance in the axial direction of the brake disc, the distance between the opposite side walls of the ventilation cavity is a ventilation distance, and the thickness distance and/or the ventilation distance are/is changed in the radial direction of the braking portion.

According to the utility model discloses the brake disc of vehicle, on the radial direction through at the braking portion, thickness interval and/or ventilation interval change for the braking portion possesses better temperature field and stress field, and in the braking process, the temperature gradient that the brake disc appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability (like heat decay, heat recovery etc.) is better, is difficult for appearing thermoelastic instability, and then the brake performance of vehicle is more stable, reliable.

In some embodiments, at least one outer side wall of the detent and/or at least one side wall of the vent chamber is provided with a boss.

In some embodiments, in the axial direction of the brake disc, opposite side walls of the ventilation chamber are each provided with the protrusions protruding towards each other.

In some embodiments, the protrusion is formed in a hemispherical shape.

In some embodiments, the protrusions are provided on both of the opposite outer side walls of the braking portion.

The brake comprises a brake block, an operating device and a brake disc, wherein the operating device is connected with the brake block to drive the brake block to move; the brake disc is according to the above, the brake disc is in contact with or separated from the brake pad.

According to the utility model discloses the stopper, on the radial direction through at the braking portion, thickness interval and/or ventilation interval change for the braking portion possess better temperature field and stress field, and in the braking process, the temperature gradient that the brake disc appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability (if heat fading, heat recovery etc.) is better, is difficult for appearing thermoelastic instability, and then the brake performance of vehicle is more stable, reliable.

In some embodiments, the brake disc is a brake disc according to the above, and the projection height of the projection gradually increases in a direction approaching an axial centerline of the brake pad.

In some embodiments, the convex apex of the boss is located on an extension of an axial centerline of the brake pad.

In some embodiments, the brake pad includes a rubber composite layer disposed at an end of the friction material layer remote from the brake portion, a metal backing plate connected between the rubber composite layer and the friction material layer, and a friction material layer.

According to the utility model discloses vehicle, including the stopper, the stopper is according to the stopper as above.

According to the utility model discloses the vehicle, on the radial direction through at the braking portion, thickness interval and/or ventilation interval change for the braking portion possess better temperature field and stress field, and in the braking process, the temperature gradient that the brake disc appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability (if heat fading, heat recovery etc.) is better, is difficult for appearing thermoelastic instability, and then the brake performance of vehicle is more stable, reliable.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic partial structure view of a vehicle according to an embodiment of the present invention;

fig. 2 is a partial schematic structural view of a brake according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a brake disc according to an embodiment of the present invention;

fig. 4 is a schematic view of an installation of the operator and brake pad according to an embodiment of the present invention.

Reference numerals:

the vehicle 1000, the hub bearing 200, the hub 300, the fender 400, the knuckle 500,

the brake (100) is provided with a brake,

the shape of the brake disc 10 is such that,

the connection part (1) is provided with a connecting part,

the stopper portion 2, the ventilation chamber 21, the boss portion 22,

a brake pad 20, a rubber composite layer 201, a metal backing plate 202, a friction material layer 203,

the manipulator 30, the caliper body 301, the piston 302, the sealing ring 303 and the dust cover 304.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A brake disc 10, a brake 100, and a vehicle 1000 of a vehicle 1000 according to an embodiment of the present invention are described below with reference to the accompanying drawings.

As shown in fig. 1, according to a brake disc 10 of a vehicle 1000 of the embodiment of the present invention, the vehicle 1000 includes a brake pad 20 and a hub bearing 200, the brake disc 10 includes a connection portion 1 and a braking portion 2, the connection portion 1 is connected to the hub bearing 200; braking portion 2 links to each other with connecting portion 1, and braking portion 2 and braking piece 20 are stopped to or are separated, are equipped with the ventilation chamber 21 with external environment intercommunication in the braking portion 2, and from this, ventilation chamber 21 can be convenient for the ventilation cooling of brake disc 10, reduces the heat decay phenomenon of brake disc 10.

Referring to fig. 1, in the axial direction of the brake disk 10, the distance between the opposite outer side walls of the brake part 2 is a thickness distance, the distance between the opposite side walls of the ventilation chamber 21 is a ventilation distance, and in the radial direction of the brake part 2, the thickness distance and/or the ventilation distance varies. That is, in the radial direction of the brake portion 2, the thickness pitch may vary; the ventilation spacing can also vary in the radial direction of the detent 2; the thickness spacing and the ventilation spacing may also both vary in the radial direction of the detent 2. The thickness pitch is changed in such a manner that the thickness pitch of a part of the brake part 2 is smaller than the thickness pitch of a part of the brake part 2 in the radial direction of the brake part 2. The ventilation interval varying means that the ventilation interval of a part of the brake part 2 is smaller than the ventilation interval of a part of the brake part 2 in the radial direction of the brake part 2.

Therefore, the braking portion 2 has a better temperature field and stress field, the temperature gradient of the brake disc 10 is smaller, the overall thermal stress is smaller, the thermal stability (such as thermal decay, thermal recovery and the like) of the friction coefficient is better, the thermoelastic instability is not easy to occur, and the braking performance of the vehicle 1000 is more stable and reliable.

It is understood that the vehicle 1000 may further include a hub 300, the driving system of the vehicle 1000 drives the hub to rotate, the hub rotates to drive the hub bearing 200 to rotate, the hub bearing 200 drives the brake disc 10 to rotate, when the vehicle 1000 wants to decelerate or stop, the brake disc 10 may be decelerated or stopped to rotate by stopping the brake pads 20 against the braking portion 2 of the brake disc 10, and the hub bearing 200 is then driven to decelerate or stop, and the hub 300 is then driven to decelerate or stop; when the vehicle 1000 wants to accelerate or start running, the driving system of the vehicle 1000 may drive the hub 300 to rotate by separating the brake pads 20 from the braking portions 2 of the brake disc 10 so that the brake disc 10 is not subject to the resistance of the brake pads 20.

In the related art, a vehicle brake system generally employs a constant thickness brake disc. In the actual braking process, because the brake disc is affected by the stress field and the temperature field, thermoelastic instability and high temperature points (or "hot spots") are more easily generated in the effective friction surface area, which may cause thermal deformation, thermal cracks, thermal vibration, noise, and the like of the brake disc.

And according to the utility model discloses vehicle 1000's brake disc 10, through in the radial direction of braking portion 2, thickness interval and/or ventilation interval change for braking portion 2 possesses better temperature field and stress field, and in the braking process, the temperature gradient that brake disc 10 appears is littleer, holistic thermal stress is littleer, coefficient of friction's thermal stability (like heat fading, heat recovery etc.) is better, the difficult thermoelastic instability that appears, and then vehicle 1000's brake performance is more stable, reliable.

In some embodiments of the present invention, at least one outer sidewall of the braking portion 2 and/or at least one sidewall of the ventilation cavity 21 is provided with the protruding portion 22, it can be understood that, as shown in fig. 2, at least one outer sidewall of the braking portion 2 may be provided with the protruding portion 22, where one outer sidewall including the braking portion 2 is provided with the protruding portion 22, and both outer sidewalls including the braking portion 2 are provided with the protruding portions 22; thereby, it is possible to make the interval between the opposite outer side walls of the brake section 2, i.e., the thickness interval, variable in the axial direction of the brake disk 10. It should also be understood that, as shown in fig. 3, at least one side wall of the ventilation cavity 21 may also be provided with the protruding portion 22, where one side wall including the ventilation cavity 21 is provided with the protruding portion 22, and two side walls including the ventilation cavity 21 are provided with the protruding portions 22; thereby, the spacing between the opposite side walls of the ventilation chamber 21, i.e., the ventilation spacing, can be varied.

It will also be appreciated that at least one outer side wall of the detent 2 and at least one side wall of the vent chamber 21 may each be provided with a boss 22. Thereby, both the thickness pitch and the ventilation pitch can be changed in the axial direction of the brake disk 10. The thickness interval and the ventilation interval are changed, so that the braking portion 2 has a better temperature field and a better stress field, the temperature gradient presented by the brake disc 10 is smaller, the overall thermal stress is smaller, the thermal stability (such as heat fading, heat recovery and the like) of the friction coefficient is better, the thermoelastic instability is not easy to occur, and the braking performance of the vehicle 1000 is more stable and reliable.

According to some embodiments of the present invention, in conjunction with fig. 3, in the axial direction of the brake disk 10, the opposite side walls of the ventilation cavity 21 may all be provided with the protrusions 22 protruding toward each other, whereby the ventilation interval of the ventilation cavity 21 may be changed, thereby improving the stability and effectiveness of the braking portion 2.

It is to be understood that the manner in which the thickness interval is varied is not limited to the provision of the convex portion described above, as long as the thickness interval is made variable, and for example, a concave portion may be provided on at least one of the opposite outer side walls of the brake portion 2. It is also understood that the manner in which the ventilation space is changed is not limited to the above-described manner in which the convex portions are provided, as long as the ventilation space can be changed, and for example, a concave portion may be provided on at least one of the opposite side walls of the ventilation chamber 21, for example, in the axial direction of the brake disc 10, the opposite side walls of the ventilation chamber 21 may also each be provided with a concave portion that is concave in a direction away from each other, and the provision of the concave portions may also cause the ventilation space of the ventilation chamber 21 to be changed.

In some embodiments of the present invention, referring to fig. 2-3, the boss 22 is formed in a hemispherical shape, it being understood that the hemispherical boss 22 may cause the spacing between the portions of the opposite outer sidewalls of the braking portion 2 where the boss 22 is disposed to be unequal everywhere; the hemispherical protrusions 22 may also be such that the spacing between the portions of opposite side walls of the ventilation cavity 21 where the protrusions 22 are provided is not equal everywhere. This can further improve the thermal stability of the friction coefficient of the brake disk 10, and improve the braking reliability of the vehicle 1000.

As shown in fig. 2, according to some embodiments of the present invention, the protrusions 22 may be disposed on the opposite outer sidewalls of the braking portion 2, so that the thickness distance of the braking portion 2 may be changed, thereby improving the stability and effectiveness of the braking portion 2. Of course, the opposite outer side walls of the braking portion 2 may be provided with recessed portions, and the thickness distance of the braking portion 2 may also be changed due to the provision of the recessed portions.

As shown in fig. 1, a brake 100 according to an embodiment of the present invention includes a brake pad 20, a manipulator 30 and a brake disc 10, wherein the manipulator 30 is connected with the brake pad 20 to drive the brake pad 20 to move; the brake rotor 10 is a brake rotor 10 according to the above, and the brake rotor 10 is in contact with or separated from the brake pad 20. It is understood that the operating device 30 can drive the brake pads 20 to move, when the vehicle 1000 needs to brake, the operating device 30 is activated to drive the brake pads 20 to move, the brake pads 20 move to contact with the braking portion 2 of the brake disk 10 to decelerate or stop rotation of the brake disk 10, and further drive the hub bearings 200 to decelerate or stop, and further drive the hub 300 to decelerate or stop.

According to the utility model discloses stopper 100, on the radial direction through at braking portion 2, thickness interval and/or ventilation interval change for braking portion 2 possesses better temperature field and stress field, and in the braking process, the temperature gradient that brake disc 10 appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability (like heat decay, heat recovery etc.) is better, is difficult for appearing thermoelasticity instability, and then vehicle 1000's brake performance is more stable, reliable.

In some embodiments of the present invention, referring to fig. 1, the brake disc 10 is the brake disc 10 as described above, in the direction close to the axial center line of the brake pad 20, the protrusion height of the protrusion 22 is gradually increased, it can be understood that the portion of the axial center line of the brake pad 20 closer to the braking portion 2 is the more effective braking portion, the braking frequency and the braking pressure received are higher, in the direction close to the axial center line of the brake pad 20, the gradual increase of the protrusion height of the protrusion 22 can further reduce the thermal decline brought to the brake disc 10 by frequent braking, so that the brake disc 10 is not easy to have thermoelastic instability, thereby improving the braking stability of the vehicle 1000. Further, the highest point of projection of the projection 22 may be located on an extension of the axial centerline of the brake pad 20.

According to some embodiments of the present invention, as shown in fig. 1, the brake pad 20 includes a rubber composite layer 201, a metal backing plate 202 and a friction material layer 203, the rubber composite layer 201 is disposed at one end of the friction material layer 203 away from the braking portion 2, and the metal backing plate 202 is connected between the rubber composite layer 201 and the friction material layer 203. The friction material layer 203 is used for stopping and separating from the braking part 2, so that the wear resistance of the brake pad 20 can be improved, and the service life of the brake pad 20 is prolonged; the rubber composite layer 201 is arranged at one end of the friction material layer 203 far away from the braking part 2, so that braking noise can be reduced. The metal back plate 202 may be a steel back plate, the metal back plate 202 isolates heat generated during braking, and the metal back plate 202 serves to connect the friction material layer 203 and the rubber composite layer 201.

According to the embodiment of the present invention, the vehicle 1000 includes the brake 100, and the brake 100 is the brake 100 as described above.

According to the utility model discloses vehicle 1000, on the radial direction through at braking portion 2, thickness interval and/or ventilation interval change for braking portion 2 possesses better temperature field and stress field, and in the braking process, the temperature gradient that brake disc 10 appears is littleer, and holistic thermal stress is littleer, and coefficient of friction's thermal stability (like heat decay, heat recovery etc.) is better, is difficult for appearing thermoelasticity instability, and then vehicle 1000's brake performance is more stable, reliable.

In some embodiments of the present invention, as shown in fig. 1, the operating device 30 may include a caliper body 301, a piston 302, a sealing ring 303 and a dust cover 304, the piston 302 may be movably disposed in the caliper body 301, and the piston 302 is connected to the brake pad 20 to drive the brake pad 20 to abut against or separate from the brake disc 10; vehicle 1000 may also include a fender 400 and a knuckle 500; the control device 30 is fixed on the knuckle 500 by bolts, the mudguard 400 and the hub bearing 300 are fixed on the knuckle 500 by bolts, the brake disc 10 is fixed on the hub bearing 300 by bolts, and the brake disc 10, the control device 30, the brake pad 20, the hub bearing 300, holes and balls of the knuckle 500 are connected with oil pipes and peripheral parts to form a suspension system of the vehicle 1000.

When the brake 100 works, two processes can be divided, one is a braking process: the piston 302 is pushed by the master cylinder pressure, the piston 302 pushes the brake pad 20, the brake pad 20 generates a pressure stress and a reverse braking torque to the rotating brake disk 10, and the vehicle 1000 decelerates or stops. The other is a brake release process: when the pressure of the master cylinder is released, the piston 302 retracts into the cylinder hole of the caliper body 301 under the driving of elastic deformation and restoration of the sealing ring 303, the brake pad 20 is separated from the brake disc 10, and the vehicle 1000 continues to move forward or keep a static state under the driving of the traction force.

In other embodiments of the present invention, as shown in fig. 4, the operator 30 may be a floating caliper.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. Brake disc (10) for a vehicle (1000), the vehicle (1000) comprising a brake pad (20) and a hub bearing (300), characterized in that the brake disc (10) comprises:

the connecting part (1), the connecting part (1) is connected with the hub bearing (300);

the brake part (2) is connected with the connecting part (1), the brake part (2) is abutted against or separated from the brake pad (20), a ventilation cavity (21) communicated with the external environment is arranged in the brake part (2), in the axial direction of the brake disc (10), the distance between the opposite outer side walls of the brake part (2) is a thickness distance, the distance between the opposite side walls of the ventilation cavity (21) is a ventilation distance, and in the radial direction of the brake part (2), the thickness distance and/or the ventilation distance are/is changed.

2. Brake disc (10) for a vehicle (1000) according to claim 1, characterised in that at least one outer side wall of the braking portion (2) and/or at least one side wall of the ventilation cavity (21) is provided with a projection (22).

3. Brake disc (10) of a vehicle (1000) according to claim 2, characterised in that opposite side walls of the ventilation chamber (21) are each provided with the projections (22) projecting towards each other in the axial direction of the brake disc (10).

4. Brake disc (10) of a vehicle (1000) according to claim 3, characterized in that the raised portion (22) is formed as a hemisphere.

5. Brake disc (10) for a vehicle (1000) according to claim 2, characterised in that said projections (22) are provided on each of the opposite outer side walls of said braking portion (2).

6. A brake (100), comprising:

a brake pad (20);

the operating device (30), the operating device (30) is connected with the brake block (20) to drive the brake block (20) to move;

brake disc (10), the brake disc (10) being a brake disc (10) according to any of claims 1-5, the brake disc (10) being in contact with or separated from the brake pad (20).

7. The brake (100) according to claim 6, characterized in that at least one outer side wall of the braking portion (2) and/or at least one side wall of the ventilation cavity (21) is provided with a boss (22); wherein the content of the first and second substances,

the projection height of the projection (22) is gradually increased in a direction approaching the axial center line of the brake pad (20).

8. The brake (100) of claim 7, wherein a convex apex of the projection (22) is located on an extension of an axial centerline of the brake pad (20).

9. The brake (100) according to any one of claims 6 to 8, characterized in that the brake pad (20) comprises a rubber composite layer (201), a metal backing plate (202) and a friction material layer (203), the rubber composite layer (201) being provided at an end of the friction material layer (203) remote from the brake portion (2), the metal backing plate (202) being connected between the rubber composite layer (201) and the friction material layer (203).

10. A vehicle (1000), characterized by comprising:

brake (100), the brake (100) being a brake (100) according to any one of claims 6-9.