CN220168413U - Floating type automobile brake disc - Google Patents

Abstract

The utility model relates to a floating type automobile brake disc, after the brake disc is assembled, an attachment part of a friction ring is connected with a first connecting part of a disc cap through hollow pins and solid pins which are circumferentially staggered and uniformly distributed, meanwhile, a fastener is arranged in each hollow pin, two ends of the fastener respectively penetrate through a connecting hole of a pressing plate and an axial through hole of a second connecting part to be locked, and after the locking, a gap is reserved between the attachment part and the pressing plate or the second connecting part, so that six degrees of freedom of the friction ring only keep the degree of freedom perpendicular to the direction of a friction surface, thereby allowing the friction ring to slightly swing in the direction perpendicular to the friction surface relative to the disc cap, and further automatically centering the friction ring when a caliper applies force to compensate the position offset possibly caused by expansion or thermal deformation of an aluminum ceramic brake disc, thereby reducing interference risk and improving braking effect and driving safety.

Description

Floating type automobile brake disc

Technical Field

The utility model relates to the technical field of brake discs, in particular to a floating type automobile brake disc.

Background

The ceramic reinforced aluminum-based composite material brake disc, namely aluminum ceramic disc for short, has the advantages of light weight, good heat conductivity, strong corrosion resistance and the like, becomes an ideal substitute for the traditional steel brake disc, and has wide application prospect in the fields of rail transit and new energy automobiles. However, aluminum ceramic brake discs also face some technical challenges in practical applications. For example, ceramic reinforced aluminum matrix composite materials have a higher coefficient of thermal expansion than cast iron materials and carbon ceramic materials, and therefore, aluminum ceramic brake disks may experience irreversible thermal deformation during repeated braking, particularly at high temperatures and uneven temperatures, whereas conventional split aluminum ceramic brake disks, friction rings and caps are typically locked axially without sufficient space margin to eliminate axial loading from thermal deformation. This may lead to a shift in the position of the friction ring and a decrease in friction performance. Meanwhile, interference phenomenon can be generated on other surrounding parts, such as calipers and the like, so that driving safety and braking effect are affected.

Disclosure of Invention

Based on this, it is necessary to provide a floating car brake disc having a sufficient space margin between the disc cap and the friction ring to eliminate the axial load due to thermal deformation, thereby improving the running safety and braking effect.

A floating automotive brake disc comprising:

the disc cap comprises a cap body, a first connecting part and a second connecting part, wherein the cap body is integrally formed, the first connecting part and the second connecting part extend outwards along the radial direction of the cap body, the outer diameter of the first connecting part is smaller than that of the second connecting part, first grooves are uniformly distributed on the first connecting part along the outer circumferential direction, and axial through holes are formed in the second connecting part at the positions of a plurality of first grooves in a circumferential uniformly distributed mode;

the friction ring is coaxially arranged with the disc cap and comprises an integrally formed disc body and an attachment part extending inwards along the radial direction of the disc body, second grooves which are the same as the first grooves in number and correspond to the first grooves in position are uniformly distributed on the attachment part along the inner circumferential direction, the first grooves provided with axial through holes and the corresponding second grooves are enclosed to form a hollow pin accommodating space, and the first grooves not provided with the axial through holes and the corresponding second grooves are enclosed to form a solid pin accommodating space;

the pressing plate covers the hollow pin accommodating space and the solid pin accommodating space, and connecting holes with the same number and corresponding positions with the axial through holes are arranged on the pressing plate;

the hollow pins are the same in number and matched in shape with the hollow pin accommodating spaces, and each hollow pin is arranged in the corresponding hollow pin accommodating space;

the solid pins are the same in number and matched in shape with the solid pin accommodating spaces, and each solid pin is arranged in the corresponding solid pin accommodating space; a kind of electronic device with high-pressure air-conditioning system

And after the fastening pieces are locked, a gap is reserved between the attachment part and the pressing plate or the second connection part.

In one embodiment, the gap is 0.1mm to 0.5mm after locking.

In one embodiment, the second connecting portion is provided with an axial through hole at a position corresponding to the first groove at least one first groove at each interval.

In one embodiment, the second connecting portion is provided with axial through holes at positions corresponding to the first grooves at intervals of two first grooves, and the number of the axial through holes is nine.

In one embodiment, a hollow pin elastic member is provided in each of the hollow pin accommodation spaces for elastically supporting the hollow pin.

In one embodiment, the elastic force of the hollow pin elastic member may support 2 to 10 times of the self weight of the hollow pin.

In one embodiment, a solid pin elastic member is further provided in each of the solid pin accommodating spaces for elastically supporting the solid pin.

In one embodiment, the elastic force of the solid pin elastic member can support 2-10 times of the dead weight of the solid pin.

In one embodiment, each hollow pin is tightly fitted with a corresponding hollow pin accommodating space in the circumferential direction; each of the solid pins is closely fitted with the corresponding solid pin accommodating space in the circumferential direction.

In one embodiment, after locking, the distance between the radially inner edge of the pressing plate and the radially outer edge of the cap body is 0.3 mm-0.8 mm, and the distance between the radially outer edge of the pressing plate and the radially inner edge of the disc body is 0.3 mm-0.8 mm.

According to the floating automobile brake disc, after the assembly, the attachment part of the friction ring is connected with the first connecting part of the disc cap through the hollow pins and the solid pins which are circumferentially and alternately distributed, meanwhile, the fastening pieces are arranged in the hollow pins, two ends of each fastening piece respectively penetrate through the connecting holes of the pressing plate and the axial through holes of the second connecting part to be locked, after the locking, a gap is reserved between the attachment part and the pressing plate or between the attachment part and the second connecting part, so that the six degrees of freedom of the friction ring are reserved only in the direction vertical to the friction surface, the friction ring is allowed to slightly swing in the direction vertical to the friction surface relative to the disc cap, and then the friction ring is automatically centered when a force is applied to the caliper, so that the position offset of the aluminum ceramic brake disc possibly caused by expansion or thermal deformation is reduced, the interference risk is reduced, and the braking effect and the driving safety are improved.

In addition, by providing the solid pin in the solid pin accommodating space, the connection strength of the friction ring and the disk cap can be improved.

Drawings

FIG. 1 is a schematic structural view of a floating automotive brake rotor according to one embodiment;

FIG. 2 is a cross-sectional view of the floating automotive brake disc of FIG. 1;

fig. 3 is a schematic view of an exploded construction of the floating car brake disc of fig. 1.

Detailed Description

The present utility model will be described more fully hereinafter in order to facilitate an understanding of the present utility model, and preferred embodiments of the present utility model are set forth. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, an embodiment of a floating automotive brake rotor 10 includes a rotor cap 11, a friction ring 13, a pressure plate 15, a hollow pin 17, a solid pin 18, and a fastener 19.

Wherein, the disk cap 11 includes a cap body 111 and first and second connection parts 113 and 115 extending radially outward along the cap body 111, an outer diameter of the first connection part 113 < an outer diameter of the second connection part 115. The first connecting portion 111 is uniformly provided with first grooves (not shown) along the outer circumferential direction, and the second connecting portion 115 is provided with axial through holes 117 at positions of the plurality of first grooves in a circumferentially uniformly distributed manner.

In the present embodiment, the cap 111, the first connection portion 113, and the second connection portion 115 are integrally formed.

It should be noted that, the second connection portion 115 is provided with axial through holes 117 at a plurality of first groove positions in a manner of being uniformly distributed in a circumferential direction, which means that the second connection portion 115 may be provided with an axial through hole 117 at each first groove position, or may be provided with an axial through hole 117 at a corresponding first groove position in a manner of n first grooves each at intervals, where n is greater than or equal to 1.

In the present embodiment, the second connection portion 115 is provided with axial through holes 117 at positions corresponding to the first grooves in such a manner that at least two first grooves are spaced apart.

Further, the second connection portion 115 is provided with axial through holes 117 at positions corresponding to the first grooves in such a manner that two first grooves are spaced apart from each other, and the number of the axial through holes 117 is 9.

The above arrangement of the axial through holes 117 can effectively improve the structural stability and torque transmission capability of the brake disc 10, and avoid the strength reduction or deformation of the second connecting portion 115, and simultaneously realize balanced stress and automatic centering between the friction ring 13 and the disc cap 11.

The friction ring 13 is arranged coaxially with the disc cap 11.

Wherein the friction ring 13 includes a disc 131 and an attachment portion 133 extending radially inward of the disc 131. The attachment portion 133 has second grooves corresponding to the first grooves in the same number and positions uniformly distributed along the inner circumferential direction.

In the present embodiment, the tray body 131 and the attachment portion 133 are integrally formed.

It will be appreciated that the upper and lower surfaces of the disc 131 are friction surfaces.

The first recess provided with the axial through hole 117 encloses with the corresponding second recess to form a hollow pin accommodation space. The first recess, where the axial through hole 117 is not provided, encloses with the corresponding second recess to form a solid pin receiving space.

In the present embodiment, the hollow pin accommodation spaces are used to accommodate the hollow pins 17, so that the hollow pins 17 are identical in number and matched in shape with the hollow pin accommodation spaces, and after assembly, each hollow pin 17 is disposed in a corresponding hollow pin accommodation space and is closely fitted with the corresponding hollow pin accommodation space in the circumferential direction for transmitting the braking torque.

In the present embodiment, the solid pin accommodation spaces are used to accommodate the solid pins 18, so that the solid pins 18 are the same in number and matched in shape with the solid pin accommodation spaces, and each solid pin 18 is disposed in the corresponding solid pin accommodation space after assembly and is tightly fitted with the corresponding solid pin accommodation space in the circumferential direction for transmitting the braking torque.

It will be appreciated that if the second connecting portion 115 is provided with an axial through hole 117 at each first groove position, there is no solid pin receiving space, nor is there a corresponding solid pin.

The pressing plate 15 is for covering the hollow pin accommodating space and the solid pin accommodating space described above. The pressing plate 15 is provided with the same number and positions of the connecting holes 151 as the axial through holes 117.

The fasteners 19 are the same number and shape matching the hollow pins 17. After assembly, each fastener 19 is disposed in the corresponding hollow pin 17, and both ends are respectively locked through the corresponding connecting hole 151 and the axial through hole 117, and after locking, a gap is left between the attachment portion 133 and the pressing plate 15 or the second connecting portion 115.

By arranging the gap, the friction ring 13 has a certain degree of freedom in the direction perpendicular to the friction surface, so that the friction ring is automatically centered when the caliper applies force, the position offset of the aluminum ceramic brake disc possibly caused by expansion or thermal deformation is compensated, the interference risk is reduced, and the braking effect and the driving safety are improved. At the same time, it is also possible to prevent the external medium from penetrating into the hollow pin accommodation space and the solid pin accommodation space to affect the damping effect and the self-centering performance of the friction ring 13.

Further, the gap is 0.1mm to 0.5mm. I.e., the distance between the attachment portion 133 and the pressing plate 15 or the second connection portion 115 after the assembly locking is 0.1mm to 0.5mm. If the clearance is too small, drag force and thermal expansion between the friction ring 13 and the disk cap 11 are increased, causing noise and abrasion; if the gap is too large, the response time and braking force of the brake may be affected, even resulting in brake failure.

In the present embodiment, the fastener 19 includes a bolt 191 and a nut 193, and after assembly, the bolt 191 is inserted through the connection hole 151, sequentially inserted through the hollow pin 17 and the axial through hole 117, and is locked by the nut 193.

Further, after locking, the distance between the radial inner edge of the pressing plate 15 and the radial outer edge of the cap 111 is 0.3 mm-0.8 mm, and the distance between the radial outer edge of the pressing plate 15 and the radial inner edge of the disc 131 is 0.3 mm-0.8 mm, which is convenient for the slight swinging of the friction ring 13 in the direction perpendicular to the friction surface, and on the other hand, can effectively prevent the pressing plate 15 from interfering or colliding with the cap 111 or the disc 111 due to thermal expansion in the braking process, thereby avoiding noise or damage.

In the present embodiment, a hollow pin elastic member 171 is further provided in each hollow pin accommodating space, and the elastic force of the hollow pin elastic member 171 can support 2 to 10 times the self weight of the hollow pin 17.

In this embodiment, each solid pin accommodating space is further provided with a solid pin elastic member 181, and the elastic force of the solid pin elastic member 181 can support 2 to 10 times of the dead weight of the solid pin 18.

The hollow pin elastic member 171 and the solid pin elastic member 181 are arranged to elastically support the hollow pin 17 and the solid pin 18, so that the six degrees of freedom of the friction ring 13 are kept only in the direction perpendicular to the friction surface, thereby allowing the friction ring 13 to slightly swing in the direction perpendicular to the friction surface relative to the disc cap 11, and further automatically centering when the caliper applies force, so as to compensate the position offset of the aluminum ceramic brake disc possibly caused by expansion or thermal deformation, reduce interference risk, and improve braking effect and driving safety; on the other hand, the hollow pins 17 and the solid pins 18 can be prevented from being deformed or loosened during the installation process, and the connection strength and stability of the friction ring 13 and the disk cap 11 can be improved. Meanwhile, the arrangement of the hollow pin elastic member 171 and the solid pin elastic member 181 can also buffer vibration and impact, reducing noise and abrasion.

In the present embodiment, the hollow pin elastic member 171 and the solid pin elastic member 181 are both springs.

After the floating automobile brake disc 10 is assembled, the attachment part 133 of the friction ring 13 is connected with the first connecting part 113 of the disc cap 11 through the hollow pins 17 and the solid pins 18 which are circumferentially and alternately distributed, meanwhile, the fastening pieces 19 are arranged in the hollow pins 17, and the two ends of each fastening piece 19 are respectively locked through the connecting holes 151 and the axial through holes 117, so that the six degrees of freedom of the friction ring 13 only keep the degree of freedom perpendicular to the friction surface direction, thereby allowing the friction ring 13 to slightly swing in the perpendicular direction relative to the disc cap 11, and further automatically centering when a caliper applies force so as to compensate the position offset of the aluminum ceramic brake disc possibly caused by expansion or thermal deformation, reduce interference risks and improve the braking effect and the driving safety.

In addition, the accommodating space formed by the surrounding of the first groove and the second groove can form a relatively airtight space through the cooperation of the pressing plate 15 and the fastening piece 19, so that the inflow of external media can be effectively prevented, the influence of excessive external media on the damping in the cavity is prevented, and the influence on the chuck, the eccentricity and the like caused by the automatic centering of the friction ring is further prevented.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A floating automotive brake disc comprising:

the disc cap comprises a cap body, a first connecting part and a second connecting part, wherein the cap body is integrally formed, the first connecting part and the second connecting part extend outwards along the radial direction of the cap body, the outer diameter of the first connecting part is smaller than that of the second connecting part, first grooves are uniformly distributed on the first connecting part along the outer circumferential direction, and axial through holes are formed in the second connecting part at the positions of a plurality of first grooves in a circumferential uniformly distributed mode;

the friction ring is coaxially arranged with the disc cap and comprises an integrally formed disc body and an attachment part extending inwards along the radial direction of the disc body, second grooves which are the same as the first grooves in number and correspond to the first grooves in position are uniformly distributed on the attachment part along the inner circumferential direction, the first grooves provided with axial through holes and the corresponding second grooves are enclosed to form a hollow pin accommodating space, and the first grooves not provided with the axial through holes and the corresponding second grooves are enclosed to form a solid pin accommodating space;

the pressing plate covers the hollow pin accommodating space and the solid pin accommodating space, and connecting holes with the same number and corresponding positions with the axial through holes are arranged on the pressing plate;

the hollow pins are the same in number and matched in shape with the hollow pin accommodating spaces, and each hollow pin is arranged in the corresponding hollow pin accommodating space;

the solid pins are the same in number and matched in shape with the solid pin accommodating spaces, and each solid pin is arranged in the corresponding solid pin accommodating space; a kind of electronic device with high-pressure air-conditioning system

And after the fastening pieces are locked, a gap is reserved between the attachment part and the pressing plate or the second connection part.

2. A floating car brake disc according to claim 1, characterized in that the clearance after locking is 0.1-0.5 mm.

3. A floating car brake disc according to claim 1, characterized in that the second connection portion is provided with axial through holes at positions corresponding to the first grooves at least one first groove per interval.

4. A floating car brake disc according to claim 3, wherein the second connection portion is provided with axial through holes at positions corresponding to the first grooves in such a manner that two first grooves are spaced apart each, the number of the axial through holes being nine.

5. A floating car brake disc as claimed in claim 1, wherein each of said hollow pin receiving spaces is further provided therein with a hollow pin elastic member for elastically supporting said hollow pin.

6. A floating car brake disc as claimed in claim 5, wherein the spring force of the hollow pin spring member supports 2 to 10 times the weight of the hollow pin.

7. A floating car brake disc as claimed in claim 1, wherein each of said solid pin receiving spaces further includes a solid pin resilient member for resiliently supporting said solid pin.

8. A floating car brake disc as claimed in claim 7, wherein said solid pin resilient member has a resilient force supporting 2 to 10 times the dead weight of said solid pin.

9. A floating car brake disc as claimed in claim 1, wherein each of said hollow pins is circumferentially closely fitted with a corresponding hollow pin receiving space; each of the solid pins is closely fitted with the corresponding solid pin accommodating space in the circumferential direction.

10. A floating car brake disc according to claim 1, wherein after locking the distance between the radially inner edge of the pressure plate and the radially outer edge of the cap is 0.3mm to 0.8mm and the distance between the radially outer edge of the pressure plate and the radially inner edge of the disc is 0.3mm to 0.8mm.