Floating composite brake disc

Abstract

The present invention discloses a floating composite brake disc, comprising a brake disc body and a brake ring, wherein the brake ring has a forming hole for accommodating molten metal during a casting process to form a connecting piece that integrates the brake ring and the brake disc body. The floating composite brake disc of the present invention forms a connecting piece connecting the brake ring and the brake disc body by casting, thereby improving the bonding strength between the brake ring and the brake disc body, reducing the manufacturing difficulty of the cast iron brake ring, and reducing the weight and manufacturing difficulty of the brake disc.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle brake discs, and in particular to a floating composite brake disc. Background Art

[0002] The existing floating composite brake disc is mainly composed of a brake disc body, an inner brake ring and an outer brake ring. The brake disc body is made of cast aluminum, and the inner and outer brake rings are cast iron brake rings. In order to ensure that the iron and aluminum are effectively combined, the inner and outer brake rings are connected to the brake disc body through connecting ribs. However, the existence of the connecting ribs will cause the overall weight of the brake disc to be large, and the core needs to be lowered during the manufacturing process of the brake disc, which is difficult to manufacture. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a floating composite brake disc, the purpose of which is to reduce the manufacturing difficulty and further reduce the weight of the brake disc.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a floating composite brake disc, including a brake disc body and a brake ring made of cast iron material, wherein the brake ring has a forming hole for accommodating molten metal during the casting process to form a connecting piece that combines the brake ring and the brake disc body into one.

[0005] The forming hole is a conical hole and a plurality of forming holes are provided. The connecting piece is a conical structure. The small diameter end of the connecting piece is fixedly connected to the brake disc body. The large diameter end of the connecting piece is located in the forming hole and the diameter of the large diameter end of the connecting piece is greater than the diameter of the small diameter end. The forming hole is a circular hole, an elliptical hole or a polygonal hole, and the forming hole is axially penetrated on the brake ring, and the axis of the forming hole is parallel to the axis of the brake ring.

[0006] The brake ring comprises a friction ring body and a first outer boss arranged on the friction ring body. A plurality of first outer bosses are provided and all the first outer bosses are arranged in sequence along the circumferential direction on the first outer circumferential surface of the friction ring body.

[0007] The friction ring body includes a braking surface, a second outer cylindrical surface, an outer step surface connected to the first outer cylindrical surface and the second outer cylindrical surface, and a joint surface fitted with the brake disc body, the first outer cylindrical surface is coaxial with the second outer cylindrical surface and the diameter of the first outer cylindrical surface is smaller than the diameter of the second outer cylindrical surface, there is a distance between the first outer boss and the outer step surface, and the forming hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction and a second outer containing groove located between the first outer boss and the outer step surface.

[0008] The friction ring body includes a braking surface and a mating surface that fits the brake disc body, the first outer cylindrical surface is located between the braking surface and the mating surface, there is a distance between the first outer boss and the braking surface, and the formed hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction and a second outer containing groove located between the first outer boss and the braking surface.

[0009] The brake ring also includes a second outer boss arranged on the friction ring body, a plurality of second outer bosses are provided and all the second outer bosses are arranged in sequence along the circumferential direction on the first outer circumferential surface of the friction ring body, the first outer bosses and the second outer bosses are staggered, and the forming hole includes a first outer containing groove located between every two first outer bosses adjacent in the circumferential direction, a second outer containing groove located between the first outer boss and the second outer boss, and a third outer containing groove located between every two second outer bosses adjacent in the circumferential direction.

[0010] The friction ring body includes a braking surface and a bonding surface that is in contact with the brake disc body, the first outer cylindrical surface is located between the braking surface and the bonding surface, and there is a distance between the first outer boss and the braking surface and the bonding surface. The formed hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction, a second outer containing groove located between the first outer boss and the braking surface, and a third outer containing groove located between the first outer boss and the bonding surface.

[0011] The brake ring further comprises a first inner boss and / or a second inner boss arranged on the friction ring body, a plurality of first inner bosses are provided and all the first inner bosses are arranged in sequence along the circumferential direction on the first inner circumferential surface of the friction ring body, a plurality of second inner bosses are provided and all the second inner bosses are arranged in sequence along the circumferential direction on the first inner circumferential surface of the friction ring body;

[0012] Or the friction ring body includes a braking surface, a second inner circular surface, a bonding surface that fits the brake disc body, and an inner step surface connected to the first inner circular surface and the second inner circular surface, the first inner circular surface is coaxial with the second inner circular surface and the diameter of the first inner circular surface is greater than the diameter of the second inner circular surface, there is a distance between the first inner boss and the inner step surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction and a second content groove located between the first inner boss and the inner step surface;

[0013] Or the friction ring body includes a braking surface and a bonding surface that fits the brake disc body, the first inner circular surface is located between the braking surface and the bonding surface, there is a distance between the first inner boss and the braking surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction and a second content groove located between the first inner boss and the braking surface;

[0014] Or the first inner boss and the second inner boss are staggered, and the forming hole includes a first outer containing groove located between every two first inner bosses adjacent to each other in the circumferential direction, a second inner containing groove located between the first inner boss and the second inner boss, and a third inner containing groove located between every two second inner bosses adjacent to each other in the circumferential direction;

[0015] Or the friction ring body includes a braking surface and a bonding surface that fits with the brake disc body, the first inner circular surface is located between the braking surface and the bonding surface, the first inner boss is spaced from the braking surface and the bonding surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction, a second content groove located between the first inner boss and the braking surface, and a third content groove located between the first inner boss and the bonding surface;

[0016] Or the brake ring further includes a first inner boss disposed on the friction ring body, and the first inner boss is a circular ring structure.

[0017] The brake ring also includes a first boss and a second boss arranged on the friction ring body, the first boss and the second boss protrude toward the same side of the joint surface of the friction ring body, the first boss and the second boss are both annular structures, and the diameter of the first boss is greater than the diameter of the second boss, and the forming hole includes a first groove located between the first boss and the second boss, a second groove located between the first boss and the outer circumferential surface of the friction ring body, a third groove arranged on the first boss, a fourth groove located between the second boss and the inner circumferential surface of the friction ring body, and a fifth groove arranged on the second boss.

[0018] The brake ring also includes a first boss and a second boss arranged on the friction ring body, the first boss and the second boss protrude toward the same side of the joint surface of the friction ring body, a plurality of first bosses are provided and all the first bosses are arranged in sequence along the circumferential direction on the joint surface of the friction ring body, a plurality of second bosses are provided and all the second bosses are arranged in sequence along the circumferential direction on the joint surface of the friction ring body, and the molded hole includes a first groove located between the first boss and the second boss, a second groove located between the first boss and the outer circumferential surface of the friction ring body, a third groove located on the first boss, a fourth groove located between the second boss and the inner circumferential surface of the friction ring body, a fifth groove located on the second boss, a sixth groove located between every two circumferentially adjacent first bosses, and a seventh groove located between every two circumferentially adjacent second bosses.

[0019] The brake ring is made of gray iron and the brake disc body is made of aluminum.

[0020] The floating composite brake disc of the present invention forms a connector connecting the brake ring and the brake disc body by casting, thereby improving the bonding strength between the brake ring and the brake disc body, reducing the manufacturing difficulty of the cast iron brake ring, and reducing the weight and manufacturing difficulty of the brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] This specification includes the following drawings, which show the following contents:

[0022] Figure 1 is a front view of the floating composite brake disc of the first embodiment;

[0023] Figure 2 yes Figure 1 Middle AA section view;

[0024] Figure 3 It is a schematic diagram of nine shapes of forming holes;

[0025] Figure 4 is a front view of the floating composite brake disc of the second embodiment;

[0026] Figure 5 yes Figure 4 Middle AA section view;

[0027] Figure 6 is a schematic diagram of the partial structure of the first brake ring of the second embodiment;

[0028] Figure 7 is a partial structural schematic diagram of the second brake ring of the second embodiment;

[0029] Figure 8 is a partial structural schematic diagram of the third brake ring of the second embodiment;

[0030] Fig. 9 is a partial structural schematic diagram of a fourth brake ring of the second embodiment;

[0031] Fig.10 is a partial structural schematic diagram of the fifth brake ring of the second embodiment;

[0032] Fig.11 is a partial structural schematic diagram of the sixth brake ring of the second embodiment;

[0033] Fig.12 It is a front view and AA cross-sectional view of the first brake disc of the third embodiment;

[0034] Fig.13 is a front view and an AA cross-sectional view of the second brake disc of the third embodiment;

[0035] Fig.14 is a front view and AA cross-sectional view of a third brake disc of Embodiment 3;

[0036] Fig.15 is a front view and a cross-sectional view of a first brake disc of the fourth embodiment;

[0037] Fig.16 is a partial structural schematic diagram of the brake ring of the fourth embodiment;

[0038] The markings in the figure are: 1, brake disc body; 2, brake ring; 3, friction ring body; 4, forming hole; 5, connecting piece; 6, first outer boss; 7, second outer boss; 8, first inner boss; 9, first outer cylindrical surface; 10, second outer cylindrical surface; 11, braking surface; 12, joint surface; 13, outer step surface; 14, inner step surface; 15, first boss; 16, second boss; DETAILED DESCRIPTION

[0039] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and facilitating its implementation.

[0040] Embodiment 1

[0041] like Figures 1 to 3 As shown, this embodiment 1 provides a floating composite brake disc, including a brake disc body 1 and a brake ring made of cast iron material, the brake ring has a forming hole 4 for accommodating molten metal during the casting process to form a connecting piece 5 that combines the brake ring and the brake disc body 1 into one body, and a plurality of forming holes 4 are provided.

[0042] Specifically, if Figure 1 and Figure 2 As shown, the brake disc body 1 is made of aluminum alloy material. During the casting process, two brake rings are placed in the mold cavity of the casting device. The molten metal poured into the mold cavity is aluminum liquid. The molten metal flows into the forming hole 4 of the brake ring, and the aluminum liquid fills the forming hole 4 and the mold cavity. During the cooling process, the brake disc body 1 is formed in the mold cavity, and the connecting piece 5 is formed in the forming hole 4. The connecting piece 5 is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one body to form a brake disc. With this structure, by optimizing the structure of the brake ring, the connecting piece 5 connecting the brake ring and the brake disc body 1 can be formed during the casting process, which not only improves the bonding strength of aluminum and iron, but also, compared with the brake disc of the prior art, the connecting ribs connecting the two brake rings can be eliminated, further reducing the weight of the cast aluminum brake disc, reducing the manufacturing difficulty of the cast iron brake ring, that is, reducing the manufacturing difficulty of the brake disc.

[0043] like Figure 1 and Figure 2As shown, the brake ring is a circular ring structure, the brake disc body 1 is located between the two brake rings, and the brake disc body 1 and the brake ring are coaxially fixedly connected, and the brake disc body 1 is used to be installed on the wheel. The brake ring has a bonding surface 12 and a braking surface 11, and the braking surface 11 is a plane perpendicular to the axis of the brake ring. The braking surface 11 is used to contact the brake pad of the brake caliper assembly to generate braking force. The bonding surface 12 fits the brake disc body 1, and the bonding surface 12 and the braking surface 11 are coaxially arranged, and the bonding surface 12 and the braking surface 11 are opposite sides of the brake ring. The forming hole 4 is a through hole set through the brake ring, and the forming hole 4 extends from the bonding surface 12 to the braking surface 11.

[0044] As a preferred example, Figure 1 and Figure 2 As shown, the forming hole 4 is a tapered hole, the connecting member 5 is a conical structure, the small diameter end of the connecting member 5 is fixedly connected to the brake disc body 1, the large diameter end of the connecting member 5 is located in the forming hole 4, and the diameter of the large diameter end of the connecting member 5 is larger than the diameter of the small diameter end, and the large diameter end and the small diameter end of the connecting member 5 are the opposite ends of the connecting member 5 in the axial direction. The forming hole 4 forms a circular opening on the joint surface 12 and the braking surface 11 of the brake ring respectively, and the diameter of the opening formed by the forming hole 4 on the joint surface 12 of the brake ring is smaller than the diameter of the opening formed by the forming hole 4 on the braking surface 11 of the brake ring, and the outer cylindrical surface of the connecting member 5 fits with the inner cylindrical surface in the forming hole 4. The axis of the forming hole 4 is parallel to the axis of the brake ring. A plurality of forming holes 4 are provided, and a connecting piece 5 is formed in each forming hole 4. The connecting piece 5 and the brake disc body 1 are integrally cast. All the forming holes 4 are evenly distributed circumferentially with the axis of the brake ring as the center line. The connecting piece 5 with a conical structure can enhance the bonding strength between the cast iron brake ring and the brake disc body 1 and prevent the brake ring and the brake disc body 1 from falling off. Moreover, the process is simple and the manufacturing is easy.

[0045] like Figure 3 As shown, the forming hole 4 can also be a circular hole (corresponding to Figure 3 a), elliptical hole (corresponding to Figure 3 f) or polygonal hole, and the forming hole 4 is set to penetrate the brake ring along the axial direction, and the axis of the forming hole 4 is parallel to the axis of the brake ring. The polygonal hole includes a triangular hole (corresponding to Figure 3 c), rectangular hole (corresponding to Figure 3 b), diamond-shaped holes (corresponding to Figure 3 Middle d), trapezoidal hole (corresponding to Figure 3 e), hexagonal hole (corresponding to Figure 3 Middle g), five-pointed star hole (corresponding to Figure 3 h) and plum blossom hole (corresponding to Figure 3 i).

[0046] Embodiment 2

[0047] like Figures 4 to 11 As shown, this second embodiment provides a floating composite brake disc, including a brake disc body 1 and a brake ring made of cast iron material, the brake ring has a forming hole for accommodating molten metal during the casting process to form a connecting piece that combines the brake ring and the brake disc body 1 into one body, the two brake rings have the same structure, and the forming holes include a first forming hole and a second forming hole.

[0048] Specifically, if Figure 4 and Figure 5 As shown, the brake disc body 1 is made of aluminum alloy material. During the casting process, two brake rings are placed in the mold cavity of the casting device. The molten metal poured into the mold cavity is aluminum liquid. The molten metal flows into the forming hole of the brake ring, and the aluminum liquid fills the forming hole and the mold cavity. During the cooling process, the brake disc body 1 is formed in the mold cavity, and a connecting piece is formed in the forming hole. The connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one body to form a brake disc. With this structure, by optimizing the structure of the brake ring, a connecting piece connecting the brake ring and the brake disc body 1 can be formed during the casting process, which not only improves the bonding strength of aluminum and iron, but also, compared with the brake disc of the prior art, the connecting ribs connecting the two brake rings can be eliminated, further reducing the weight of the cast aluminum brake disc, reducing the manufacturing difficulty of the cast iron brake ring, and also reducing the manufacturing difficulty of the brake disc.

[0049] like Figures 4 to 11 As shown, the brake ring is a circular ring structure, the brake disc body 1 is located between the two brake rings, and the brake disc body 1 and the brake ring are coaxially fixedly connected, and the brake disc body 1 is used to be installed on the wheel. The brake ring has a bonding surface 12 and a braking surface 11, and the braking surface 11 and the bonding surface 12 are both planes perpendicular to the axis of the brake ring. The braking surface 11 is used to contact the brake pad of the brake caliper assembly to generate braking force. The bonding surface 12 is in contact with the brake disc body 1, and the bonding surface 12 and the braking surface 11 are coaxially arranged and the bonding surface 12 and the braking surface 11 are opposite sides of the brake ring.

[0050] like Figures 4 to 6As shown, the brake ring includes a friction ring body 3 and a first outer boss 6 arranged on the friction ring body 3. A plurality of first outer bosses 6 are provided and all of the first outer bosses 6 are arranged in sequence along the circumferential direction on the first outer cylindrical surface 9 of the friction ring body 3. The friction ring body 3 is an annular structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a braking surface 11, a second outer cylindrical surface 10, an outer step surface 13 connected to the first outer cylindrical surface 9 and the second outer cylindrical surface 10, and a bonding surface 12 that fits the brake disc body 1. The first outer cylindrical surface 9 and the second outer cylindrical surface 10 are both cylindrical surfaces. The first outer cylindrical surface 9 and the second outer cylindrical surface 10 are coaxial with the bonding surface 12 and the braking surface 11, and the diameter of the first outer cylindrical surface 9 is smaller than that of the second outer cylindrical surface 10. 0, the diameter of the second outer cylindrical surface 10 is also the outer diameter of the brake ring, the outer step surface 13 is a circular ring surface and the outer step surface 13 is a plane parallel to the brake surface 11 and the combining surface 12, one end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the combining surface 12, the other end of the first outer cylindrical surface 9 is vertically connected to the inner edge of the outer step surface 13, one end of the second outer cylindrical surface 10 is vertically connected to the outer edge of the outer step surface 13, and the other end of the second outer cylindrical surface 10 is vertically connected to the outer edge of the brake surface 11. The first outer boss 6 is flush with the joint surface 12, the thickness of the first outer boss 6 is less than the vertical distance between the joint surface 12 and the outer step surface 13 (the vertical distance is also the width of the first outer cylindrical surface 9), the thickness direction of the first outer boss 6 is parallel to the axis of the friction ring body 3, there is a distance between the first outer boss 6 and the outer step surface 13, and the first molded hole includes a first outer accommodating groove located between every two first outer bosses 6 adjacent to each other in the circumferential direction and a second outer accommodating groove located between the first outer boss 6 and the outer step surface 13. The first outer boss 6 extends outward toward the outer side of the first outer cylindrical surface 9 along the radial direction of the friction ring body 3, a plurality of first outer bosses 6 are provided and all the first outer bosses 6 are evenly distributed along the entire circumferential direction on the first outer cylindrical surface 9, a first outer accommodating groove is formed between every two adjacent first outer bosses 6 in the circumferential direction, and because there is a certain distance between the first outer boss 6 and the outer step surface 13, the distance forms a second outer accommodating groove, the second outer accommodating groove is a circular groove, and the second outer accommodating groove is connected with all the first outer accommodating grooves. In this way, during the casting process, the two brake rings are placed in the cavity of the casting device, and the molten metal poured into the cavity is molten aluminum. The molten metal flows into the first outer containing groove and the second outer containing groove of the brake ring, that is, the molten aluminum fills the first forming hole and the cavity; during the cooling process, a brake disc body 1 is formed in the cavity, and a first connecting piece is formed in the first forming hole. The first connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The first forming hole is used to form the first connecting member, the first connecting member includes a first outer connecting part and a second outer connecting part, the first outer containing groove of the brake ring is used to form the first outer connecting part, the second outer containing groove of the brake ring is used to form the second outer connecting part, the first outer connecting part is located between two adjacent first outer bosses 6 in the circumferential direction, the second outer connecting part is located between the outer step surface 13 and the first outer boss 6, the second outer connecting part is a circular ring structure, and the outer diameter of the second outer connecting part is the same as the diameter of the second outer cylindrical surface 10, and the second outer connecting part is fitted with the outer step surface 13, the first outer boss 6 and the first outer cylindrical surface 9. The first connecting member of this structural form can improve the connection strength between the brake ring and the brake disc body 1, make the processing technology simple, and reduce the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, and pass over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0051] As another variant implementation scheme, Figure 4 , Figure 5 and Figure 7As shown, the brake ring also includes a second outer boss 7 arranged on the friction ring body 3, and a plurality of second outer bosses 7 are provided and all of the second outer bosses 7 are arranged in sequence along the circumferential direction on the first outer cylindrical surface 9 of the friction ring body 3. The friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a braking surface 11, a bonding surface 12 and a first outer cylindrical surface 9. The first outer cylindrical surface 9 is a cylindrical surface and the first outer cylindrical surface 9 is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first outer cylindrical surface 9 is also the outer diameter of the friction ring body 3. One end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the bonding surface 12, and the other end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the braking surface 11. The thickness of the first outer boss 6 and the second outer boss 7 is less than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), the thickness direction of the first outer boss 6 and the second outer boss 7 is parallel to the axis of the friction ring body 3, and the thickness of the first outer boss 6 and the second outer boss 7 is the same, the first outer boss 6 is flush with the joint surface 12, the second outer boss 7 is flush with the braking surface 11, and the distance between the first outer boss 6 and the braking surface 11 is the same as the distance between the second outer boss 7 and the joint surface 12. In the axial direction of the friction ring body 3, there is a distance between the first outer boss 6 and the second outer boss 7, and there is a certain distance between the circumference where all the first outer bosses 6 are located and the circumference where all the second outer bosses 7 are located. The first forming hole includes a first outer containing groove located between every two adjacent first outer bosses 6 in the circumferential direction, a second outer containing groove located between the first outer boss 6 and the second outer boss 7, and a third outer containing groove located between every two adjacent second outer bosses 7 in the circumferential direction. The first outer boss 6 extends outwardly toward the first outer cylindrical surface 9 along the radial direction of the friction ring body 3, a plurality of first outer bosses 6 are provided and all the first outer bosses 6 are evenly distributed along the entire circumferential direction on the first outer cylindrical surface 9, and a first outer containing groove is formed between every two adjacent first outer bosses 6 in the circumferential direction, and the second outer boss 7 extends outwardly toward the first outer cylindrical surface 9 along the radial direction of the friction ring body 3, a plurality of second outer bosses 7 are provided and all the second outer bosses 7 are evenly distributed along the entire circumferential direction on the first outer cylindrical surface 9, and a third outer containing groove is formed between every two adjacent second outer bosses 7 in the circumferential direction, and because there is a certain distance between the first outer boss 6 and the second outer boss 7, the distance forms a second outer containing groove, and the second outer containing groove is a circular ring groove, and the second outer containing groove is connected with all the first outer containing grooves and the third outer containing groove. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is molten aluminum. The molten metal flows into the first outer containing groove, the second outer containing groove and the third outer containing groove of the brake ring, that is, the molten aluminum fills the first forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, and a first connecting piece is formed in the first forming hole. The first connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The first forming hole is used to form the first connecting member, the first connecting member includes a first external connecting part, a second external connecting part and a third external connecting part, the first external accommodating groove of the brake ring is used to form the first external connecting part, the second external accommodating groove of the brake ring is used to form the second external connecting part, the third external accommodating groove of the brake ring is used to form the third external connecting part, the first external connecting part is located between two first external bosses 6 adjacent to each other in the circumferential direction and the first external connecting part is connected to the brake disc body 1, the second external connecting part is located between the first external boss 6 and the second external boss 7, the second external connecting part is a circular ring structure and the outer diameter of the second external connecting part is also the outer diameter of the brake ring, the second external connecting part is fitted with the first external boss 6, the second external boss 7 and the first outer cylindrical surface 9, the third external connecting part is located between two second external bosses 7 adjacent to each other in the circumferential direction and the third external connecting part is flush with the brake surface 11, and the second external connecting part is located between the first external connecting part and the third external connecting part. The first connecting member of this structural form can improve the connection strength between the brake ring and the brake disc body 1, simplify the processing technology and reduce the manufacturing difficulty. Moreover, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0052] like Figure 4 , Figure 5 and Figure 7 As shown, the number of the first external bosses 6 and the second external bosses 7 is the same, and the first external bosses 6 and the second external bosses 7 are staggered, which means that on the projection plane perpendicular to the axis of the brake ring, the position of each first external boss 6 on the projection plane is between the positions of two adjacent second external bosses 7 on the projection plane, and the position of each second external boss 7 on the projection plane is between the positions of two adjacent first external bosses 6 on the projection plane. The first external bosses 6 and the second external bosses 7 are arranged in a staggered manner, which is more conducive to improving the bonding strength between the brake ring and the brake disc body 1.

[0053] As a variant implementation scheme, Figure 4 , Figure 5 and Figure 8As shown, the friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first outer cylindrical surface 9, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first outer cylindrical surface 9 is located between the braking surface 11 and the bonding surface 12. There is a distance between the first outer boss 6 and the braking surface 11. The first molded hole includes a first outer containing groove located between every two first outer bosses 6 adjacent to each other in the circumferential direction and a second outer containing groove located between the first outer boss 6 and the braking surface 11. The first outer cylindrical surface 9 is a cylindrical surface and the first outer cylindrical surface 9 is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first outer cylindrical surface 9 is also the outer diameter of the friction ring body 3. One end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the bonding surface 12, and the other end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the braking surface 11. The thickness of the first outer boss 6 is smaller than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), the thickness direction of the first outer boss 6 is parallel to the axis of the friction ring body 3, and the first outer boss 6 is flush with the joint surface 12. The first outer boss 6 extends outward toward the first outer cylindrical surface 9 along the radial direction of the friction ring body 3, a plurality of first outer bosses 6 are provided, and all first outer bosses 6 are evenly distributed along the entire circumference on the first outer cylindrical surface 9, a first outer containing groove is formed between every two adjacent first outer bosses 6 in the circumferential direction, and because there is a certain distance between the first outer boss 6 and the braking surface 11, the distance forms a second outer containing groove, the second outer containing groove is a circular groove, and the second outer containing groove is connected with all the first outer containing grooves. In this way, during the casting process, the two brake rings are placed in the cavity of the casting device, and the molten metal poured into the cavity is molten aluminum. The molten metal flows into the first outer containing groove and the second outer containing groove of the brake ring, that is, the molten aluminum fills the first forming hole and the cavity; during the cooling process, a brake disc body 1 is formed in the cavity, and a first connecting piece is formed in the first forming hole. The first connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The first forming hole is used to form the first connecting member, the first connecting member includes a first external connecting part and a second external connecting part, the first external containing groove of the brake ring is used to form the first external connecting part, the second external containing groove of the brake ring is used to form the second external connecting part, the first external connecting part is located between two first external bosses 6 adjacent to each other in the circumferential direction and the first external connecting part is connected to the brake disc body 1, the second external connecting part is located between the brake surface 11 and the first external boss 6, the second external connecting part is a circular ring structure and the outer diameter of the second external connecting part is also the outer diameter of the brake ring, the second external connecting part is in contact with the first external boss 6 and the first outer cylindrical surface 9 and the second external connecting part is flush with the brake surface 11. This structural form of the first connecting member can improve the connection strength between the brake ring and the brake disc body 1, simplify the processing technology and reduce the manufacturing difficulty.Moreover, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0054] As another variant implementation scheme, Figure 4 , Figure 5 , Fig. 9 and Fig.10As shown, the friction ring body 3 is a circular ring structure and the brake disc body 1 is coaxially fixedly connected with the friction ring body 3. The friction ring body 3 includes a first outer cylindrical surface 9, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first outer cylindrical surface 9 is located between the braking surface 11 and the bonding surface 12. There is a distance between the first outer boss 6 and the braking surface 11 and the bonding surface 12. The first molded hole includes a first outer containing groove located between every two first outer bosses 6 adjacent to each other in the circumferential direction, a second outer containing groove located between the first outer boss 6 and the braking surface 11, and a third outer containing groove located between the first outer boss 6 and the bonding surface 12. The first outer cylindrical surface 9 is a cylindrical surface and the first outer cylindrical surface 9 is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first outer cylindrical surface 9 is also the outer diameter of the brake ring. One end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the bonding surface 12, and the other end of the first outer cylindrical surface 9 is vertically connected to the outer edge of the braking surface 11. The thickness of the first outer boss 6 is smaller than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), and the thickness direction of the first outer boss 6 is parallel to the axis of the friction ring body 3. In the axial direction of the friction ring body 3, there is a distance between the first outer boss 6 and the braking surface 11, and there is also a distance between the first outer boss 6 and the joint surface 12. The first outer boss 6 extends outwardly toward the first outer cylindrical surface 9 along the radial direction of the friction ring body 3. A plurality of first outer bosses 6 are provided and all the first outer bosses 6 are evenly distributed along the entire circumference on the first outer cylindrical surface 9. A first outer containing groove is formed between every two adjacent first outer bosses 6 in the circumferential direction, and a certain distance is provided between the first outer boss 6 and the braking surface 11, which forms a second outer containing groove. A certain distance is provided between the first outer boss 6 and the bonding surface 12, which forms a third outer containing groove. Both the second outer containing groove and the third outer containing groove are annular grooves. The second outer containing groove and the third outer containing groove are connected with all the first outer containing grooves, and the first outer containing groove is located between the second outer containing groove and the third outer containing groove. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is molten aluminum. The molten metal flows into the first outer containing groove, the second outer containing groove and the third outer containing groove of the brake ring, that is, the molten aluminum fills the first forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, and a first connecting piece is formed in the first forming hole. The first connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The first forming hole is used to form a first connecting member, and the first connecting member includes a first external connecting part, a second external connecting part and a third external connecting part. The first external accommodating groove of the brake ring is used to form the first external connecting part, the second external accommodating groove of the brake ring is used to form the second external connecting part, and the third external accommodating groove of the brake ring is used to form the third external connecting part. The first external connecting part is located between two first external bosses 6 adjacent to each other in the circumferential direction, and the second external connecting part is located between the first external boss 6 and the braking surface 11. The second external connecting part is a circular ring structure and the outer diameter of the second external connecting part is also the outer diameter of the brake ring. The second external connecting part is flush with the braking surface 11, the second external connecting part is fitted with the first external boss 6 and the first outer cylindrical surface 9, and the third external connecting part is located between the first external boss 6 and the bonding surface 12. The third external connecting part is a circular ring structure and the outer diameter of the third external connecting part is the same as the outer diameter of the second external connecting part. The third external connecting part is fitted with the first external boss 6 and the first outer cylindrical surface 9 and the third external connecting part is connected to the brake disc body 1, and the first external connecting part is located between the second external connecting part and the third external connecting part. This structural form of the first connecting member can improve the connection strength between the brake ring and the brake disc body 1, making the processing technology simpler and reducing the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction, and after the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0055] The first outer boss 6 has a variety of structural forms. The first outer boss 6 can be a rectangular block structure or a cylindrical structure. The structure of the second outer boss 7 is the same as that of the first outer boss 6. Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, the first outer boss 6 is a rectangular block structure. Fig. 9 and Fig.11 As shown, the first outer boss 6 is a cylindrical structure, and the first outer boss 6 extends along the radial direction of the friction ring body 3 , and the axis of the first outer boss 6 is perpendicular to the axis of the friction ring body 3 .

[0056] like Figures 4 to 6As shown, the brake ring further includes a first inner boss 8 disposed on the friction ring body 3, a plurality of first inner bosses 8 are provided and all first inner bosses 8 are sequentially arranged along the circumferential direction on the first inner circumferential surface of the friction ring body 3. The friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected, and the first inner boss 8 is fixedly connected to the friction ring body 3. The friction ring body 3 includes a braking surface 11, a second inner circular surface, a bonding surface 12 that is fitted with the brake disc body 1, and an inner step surface 14 that is connected to the first inner circular surface and the second inner circular surface. The first inner circular surface and the second inner circular surface are both cylindrical surfaces. The first inner circular surface and the second inner circular surface are coaxial with the bonding surface 12 and the braking surface 11, and the diameter of the first inner circular surface is greater than the diameter of the second inner circular surface. The diameter of the second inner circular surface is also the inner diameter of the brake ring, and the inner diameter of the brake ring is smaller than the outer diameter of the brake ring. The inner step surface 14 is a toroidal surface and the inner step surface 14 is a plane parallel to the braking surface 11 and the bonding surface 12. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the outer edge of the inner step surface 14. One end of the second outer circular surface 10 is vertically connected to the inner edge of the inner step surface 14, and the other end of the second outer circular surface 10 is vertically connected to the inner edge of the braking surface 11. The first inner boss 8 is flush with the mating surface 12, the thickness of the first inner boss 8 is smaller than the vertical distance between the mating surface 12 and the inner step surface 14 (the vertical distance is also the width of the first inner circular surface, and the width of the first inner circular surface is the same as the width of the first outer circular surface 9), the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3, there is a distance between the first inner boss 8 and the inner step surface 14, and the second molded hole includes a first content groove located between every two adjacent first inner bosses 8 in the circumferential direction and a second content groove located between the first inner boss 8 and the inner step surface 14. The first inner boss 8 extends outward from the inner side of the first inner circular surface along the radial direction of the friction ring body 3 (the inner side refers to the side close to the center of the friction ring body 3). A plurality of first inner bosses 8 are provided and all first inner bosses 8 are evenly distributed along the entire circumference on the first inner circular surface. A first content groove is formed between each two adjacent first inner bosses 8 in the circumferential direction. Moreover, since there is a certain distance between the first inner boss 8 and the inner step surface 14, the distance forms a second content groove, which is a circular groove, and the second content groove is connected with all the first content grooves. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is aluminum liquid, which flows into the first content groove and the second content groove of the brake ring, that is, the aluminum liquid fills the second forming hole and the mold cavity; during the cooling process, the brake disc body 1 is formed in the mold cavity, and the second connecting member is formed in the second forming hole. The second connecting member is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one body to form a brake disc.The second forming hole is used to form the second connecting member, the second connecting member includes a first inner connecting part and a second inner connecting part, the first content groove of the brake ring is used to form the first inner connecting part, the second content groove of the brake ring is used to form the second inner connecting part, the first inner connecting part is located between two adjacent first inner bosses 8 in the circumferential direction, the second inner connecting part is located between the inner step surface 14 and the first inner boss 8, the second inner connecting part is a circular ring structure, and the inner diameter of the second inner connecting part is the same as the diameter of the second inner circular surface, and the second inner connecting part fits with the inner step surface 14, the first inner boss 8 and the first inner circular surface. The second connecting member of this structural form can further enhance the connection strength between the brake ring and the brake disc body 1, making the processing technology simple and reducing the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, and pass over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are more effectively combined together.

[0057] As another variant implementation scheme, Figure 4 , Figure 5 and Figure 7As shown, the brake ring also includes a second inner boss arranged on the friction ring body 3, and a plurality of second inner bosses are provided and all the second inner bosses are arranged in sequence along the circumferential direction on the first inner circular surface of the friction ring body 3. The friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a braking surface 11, a bonding surface 12 and a first inner circular surface. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the friction ring body 3. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 and the second inner boss is less than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), the thickness direction of the first inner boss 8 and the second inner boss is parallel to the axis of the friction ring body 3, and the thickness of the first inner boss 8 and the second inner boss is the same, the first inner boss 8 is flush with the joint surface 12, the second inner boss is flush with the braking surface 11, and the distance between the first inner boss 8 and the braking surface 11 is the same as the distance between the second inner boss and the joint surface 12. In the axial direction of the friction ring body 3, there is a distance between the first inner boss 8 and the second inner boss, and there is a certain distance between the circumference where all the first inner bosses 8 are located and the circumference where all the second inner bosses are located. The second forming hole includes a first content groove located between every two first inner bosses 8 adjacent to each other in the circumferential direction, a second content groove located between the first inner boss 8 and the second inner boss, and a third content groove located between every two second inner bosses adjacent to each other in the circumferential direction. The first inner boss 8 extends outwards toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3 (the inner side refers to the side close to the center of the friction ring body 3), a plurality of first inner bosses 8 are provided and all the first inner bosses 8 are evenly distributed along the entire circumferential direction on the first inner circular surface, and a first content groove is formed between every two adjacent first inner bosses 8 in the circumferential direction, and the second inner boss extends outwards toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3, a plurality of second inner bosses are provided and all the second inner bosses are evenly distributed along the entire circumferential direction on the first inner circular surface, and a third content groove is formed between every two adjacent second inner bosses in the circumferential direction, and because there is a certain distance between the first inner boss 8 and the second inner boss, the distance forms a second content groove, and the second content groove is a circular ring groove, and the second content groove is connected with all the first content grooves and the third content groove. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is molten aluminum. The molten metal flows into the first content groove, the second content groove and the third content groove of the brake ring, that is, the molten aluminum fills the second forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, a second connecting piece is formed in the second forming hole, the second connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The second forming hole is used to form the second connecting member, the second connecting member includes a first inner connecting part, a second inner connecting part and a third inner connecting part, the first content groove of the brake ring is used to form the first inner connecting part, the second content groove of the brake ring is used to form the second inner connecting part, the third content groove of the brake ring is used to form the third inner connecting part, the first inner connecting part is located between two first inner bosses 8 adjacent to each other in the circumferential direction and the first inner connecting part is connected to the brake disc body 1, the second inner connecting part is located between the first inner boss 8 and the second inner boss, the second inner connecting part is a circular ring structure and the inner diameter of the second inner connecting part is also the inner diameter of the brake ring, the second inner connecting part is fitted with the first inner boss 8, the second inner boss and the first inner circular surface, the third inner connecting part is located between two second inner bosses adjacent to each other in the circumferential direction and the third inner connecting part is flush with the brake surface 11, and the second inner connecting part is located between the first inner connecting part and the third inner connecting part. The second connecting member of this structural form can further enhance the connection strength between the brake ring and the brake disc body 1, simplify the processing technology and reduce the manufacturing difficulty. Moreover, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0058] like Figure 4 , Figure 5 and Figure 7 As shown, the number of the first inner bosses 8 and the second inner bosses is the same, and the first inner bosses 8 and the second inner bosses are staggered, which means that on the projection plane perpendicular to the axis of the brake ring, the position of each first inner boss 8 on the projection plane is between the positions of two adjacent second inner bosses on the projection plane, and the position of each second inner boss on the projection plane is between the positions of two adjacent first inner bosses 8 on the projection plane. The first inner bosses 8 and the second inner bosses are arranged in a staggered manner, which is more conducive to improving the bonding strength between the brake ring and the brake disc body 1.

[0059] As a variant implementation scheme, Figure 4 , Figure 5 and Figure 8As shown, the friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first inner circular surface, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first inner circular surface is located between the braking surface 11 and the bonding surface 12. There is a distance between the first inner boss 8 and the braking surface 11. The second molded hole includes a first content-receiving groove located between every two first inner bosses 8 adjacent to each other in the circumferential direction and a second content-receiving groove located between the first inner boss 8 and the braking surface 11. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the friction ring body 3. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 is smaller than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3, and the first inner boss 8 is flush with the joint surface 12. The first inner boss 8 extends toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3, a plurality of first inner bosses 8 are provided, and all first inner bosses 8 are evenly distributed along the entire circumferential direction on the first inner circular surface, and a first content groove is formed between every two adjacent first inner bosses 8 in the circumferential direction, and because there is a certain distance between the first inner boss 8 and the braking surface 11, the distance forms a second content groove, and the second content groove is a circular ring groove, and the second content groove is connected with all the first content grooves. In this way, during the casting process, the two brake rings are placed in the cavity of the casting device, and the molten metal poured into the cavity is molten aluminum. The molten metal flows into the first content groove and the second content groove of the brake ring, that is, the molten aluminum fills the second forming hole and the cavity; during the cooling process, a brake disc body 1 is formed in the cavity, and a second connecting piece is formed in the second forming hole. The second connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The second forming hole is used to form the second connecting member, the second connecting member includes a first inner connecting part and a second inner connecting part, the first content groove of the brake ring is used to form the first inner connecting part, the second content groove of the brake ring is used to form the second inner connecting part, the first inner connecting part is located between two first inner bosses 8 adjacent to each other in the circumferential direction and the first inner connecting part is connected to the brake disc body 1, the second inner connecting part is located between the brake surface 11 and the first inner boss 8, the second inner connecting part is a circular ring structure and the inner diameter of the second inner connecting part is also the inner diameter of the brake ring, the second inner connecting part is in contact with the first inner boss 8 and the first inner circular surface and the second inner connecting part is flush with the brake surface 11. This structural form of the second connecting member can further enhance the connection strength between the brake ring and the brake disc body 1, simplify the processing technology, and reduce the manufacturing difficulty.Moreover, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0060] As another variant implementation scheme, Figure 4 , Figure 5 , Fig. 9 and Fig.10As shown, the friction ring body 3 is a circular ring structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first inner circular surface, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first inner circular surface is located between the braking surface 11 and the bonding surface 12. There is a distance between the first inner boss 8 and the braking surface 11 and the bonding surface 12. The second molded hole includes a first content groove located between every two first inner bosses 8 adjacent to each other in the circumferential direction, a second content groove located between the first inner boss 8 and the braking surface 11, and a third content groove located between the first inner boss 8 and the bonding surface 12. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the brake ring. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 is smaller than the vertical distance between the joint surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), and the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3. In the axial direction of the friction ring body 3, there is a distance between the first inner boss 8 and the braking surface 11, and there is also a distance between the first inner boss 8 and the joint surface 12. The first inner boss 8 extends outwards from the inner side of the first inner circular surface along the radial direction of the friction ring body 3. A plurality of first inner bosses 8 are provided and all the first inner bosses 8 are evenly distributed along the entire circumferential direction on the first inner circular surface. A first content groove is formed between every two adjacent first inner bosses 8 in the circumferential direction, and a certain distance is provided between the first inner boss 8 and the braking surface 11, which forms a second content groove. A certain distance is provided between the first inner boss 8 and the bonding surface 12, which forms a third content groove. Both the second content groove and the third content groove are annular grooves. The second content groove and the third content groove are connected with all the first content grooves and the first content groove is located between the second content groove and the third content groove. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is molten aluminum. The molten metal flows into the first content groove, the second content groove and the third content groove of the brake ring, that is, the molten aluminum fills the second forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, a second connecting piece is formed in the second forming hole, the second connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The second forming hole is used to form the second connecting member, and the second connecting member includes a first inner connecting part, a second inner connecting part and a third inner connecting part. The first content groove of the brake ring is used to form the first inner connecting part, the second content groove of the brake ring is used to form the second inner connecting part, and the third content groove of the brake ring is used to form the third inner connecting part. The first inner connecting part is located between two first inner bosses 8 adjacent to each other in the circumferential direction, and the second inner connecting part is located between the first inner boss 8 and the braking surface 11. The second inner connecting part is a circular ring structure and the outer diameter of the second inner connecting part is also the inner diameter of the brake ring. The second inner connecting part is flush with the braking surface 11, the second inner connecting part is fitted with the first inner boss 8 and the first inner circular surface, and the third inner connecting part is located between the first inner boss 8 and the bonding surface 12. The third inner connecting part is a circular ring structure and the inner diameter of the third inner connecting part is the same as the inner diameter of the second inner connecting part. The third inner connecting part is fitted with the first inner boss 8 and the first inner circular surface and the third inner connecting part is connected to the brake disc body 1, and the first inner connecting part is located between the second inner connecting part and the third inner connecting part. This type of second connector can further enhance the connection strength between the brake ring and the brake disc body 1, simplify the processing technology, and reduce the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction, and after the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0061] The first inner boss 8 has a variety of structural forms. The first inner boss 8 can be a rectangular block structure or a cylindrical structure. The structure of the second inner boss is the same as that of the first inner boss 8. Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, the first inner boss 8 is a rectangular block structure. Fig. 9 and Fig.11 As shown, the first inner boss 8 is a cylindrical structure, and the first inner boss 8 extends along the radial direction of the friction ring body 3 , and the axis of the first inner boss 8 is perpendicular to the axis of the friction ring body 3 .

[0062] Embodiment 3

[0063] like Figure 12 to Figure 14 As shown, the third embodiment provides a floating composite brake disc, including a brake disc body 1 and a brake ring made of cast iron material, the brake ring has a forming hole for accommodating molten metal during the casting process to form a connecting piece that integrates the brake ring and the brake disc body 1, and the two brake rings have the same structure. The forming holes include a first forming hole and a second forming hole, the connecting piece includes a first connecting piece and a second connecting piece, the first forming hole is used to form the first connecting piece, and the second forming hole is used to form the second connecting piece.

[0064] like Figure 12 to Figure 14 As shown, the brake disc body 1 is made of aluminum alloy material. During the casting process, two brake rings are placed in the mold cavity of the casting device. The molten metal poured into the mold cavity is aluminum liquid. The molten metal flows into the forming hole of the brake ring, and the aluminum liquid fills the forming hole and the mold cavity. During the cooling process, the brake disc body 1 is formed in the mold cavity, and a connecting piece is formed in the forming hole. The connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one body to form a brake disc. With this structure, by optimizing the structure of the brake ring, a connecting piece connecting the brake ring and the brake disc body 1 can be formed during the casting process, which not only improves the bonding strength of aluminum and iron, but also, compared with the brake disc of the prior art, the connecting ribs connecting the two brake rings can be eliminated, further reducing the weight of the cast aluminum brake disc, reducing the manufacturing difficulty of the cast iron brake ring, and also reducing the manufacturing difficulty of the brake disc.

[0065] like Figure 12 to Figure 14 As shown, the brake ring is a circular ring structure, the brake disc body 1 is located between the two brake rings, and the brake disc body 1 and the brake ring are coaxially fixedly connected, and the brake disc body 1 is used to be installed on the wheel. The brake ring has a bonding surface 12 and a braking surface 11, and the braking surface 11 and the bonding surface 12 are both planes perpendicular to the axis of the brake ring. The braking surface 11 is used to contact the brake pad of the brake caliper assembly to generate braking force. The bonding surface 12 fits the brake disc body 1, and the bonding surface 12 and the braking surface 11 are coaxially arranged, and the bonding surface 12 and the braking surface 11 are opposite sides of the brake ring. The brake ring includes a friction ring body 3 and a first inner boss 8, a first outer boss 6 and / or a second outer boss 7 arranged on the friction ring body 3. A plurality of first outer bosses 6 are provided, and all the first outer bosses 6 are arranged in sequence along the circumferential direction on the first outer cylindrical surface 9 of the friction ring body 3. A plurality of second outer bosses 7 are provided, and all the second outer bosses 7 are arranged in sequence along the circumferential direction on the first outer cylindrical surface 9 of the friction ring body 3. In this embodiment, the arrangement and structure of the first outer boss 6 and the second outer boss 7 are the same as those of the first outer boss 6 and the second outer boss 7 of the brake disc of the second embodiment, and are not described in detail here. The arrangement and structure of the first inner boss 8 of the brake disc of this embodiment are not completely the same as those of the first inner boss 8 of the brake disc of the second embodiment.

[0066] Specifically, if Fig.12As shown, the friction ring body 3 is an annular structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first inner circular surface, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first inner circular surface is located between the braking surface 11 and the bonding surface 12. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the friction ring body 3. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 is less than the vertical distance between the bonding surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), and the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3. Two first inner bosses 8 are provided and there is a certain distance between the two first inner bosses 8. In the axial direction of the friction ring body 3, the second forming hole is located between the two first inner bosses 8, and one of the first inner bosses 8 is flush with the brake surface 11, and the other first inner boss 8 is flush with the joint surface 12. The first inner boss 8 extends toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3. The first inner boss 8 is a circular ring structure and the first inner boss 8 is coaxially fixedly connected with the friction ring body 3. The first inner boss 8 does not extend along the entire circumference of the friction ring body 3. There is a distance between the two first inner bosses 8, thereby forming a second forming hole. The second forming hole is a circular ring hole extending along the entire circumference on the inner circular surface of the brake ring and the second forming hole is located at the middle position in the thickness direction of the brake ring. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is aluminum liquid, and the molten metal flows into the second forming hole of the brake ring, that is, the aluminum liquid fills the second forming hole and the mold cavity; during the cooling process, the brake disc body 1 is formed in the mold cavity, and the second connecting piece is formed in the second forming hole, and the second connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The second forming hole is used to form the second connecting piece, and the second connecting piece is a circular ring structure. The second connecting piece fits the first inner boss 8 and the first inner circular surface, and the second connecting piece is located between the two first inner bosses 8. The second connecting piece of this structural form can further improve the connection strength between the brake ring and the brake disc body 1, making the processing technology simple and reducing the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, and cross the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0067] As a variant implementation scheme, Fig.13As shown, the friction ring body 3 is an annular structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first inner circular surface, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first inner circular surface is located between the braking surface 11 and the bonding surface 12. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the friction ring body 3. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 is less than the vertical distance between the bonding surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), and the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3. One first inner boss 8 is provided and the first inner boss 8 is flush with the joint surface 12. The first inner boss 8 extends toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3. The first inner boss 8 is an annular structure and the first inner boss 8 is coaxially fixedly connected with the friction ring body 3. The first inner boss 8 does not extend along the entire circumference of the friction ring body 3. There is a certain distance between the first inner boss 8 and the brake surface 11, so as to form a second forming hole. The second forming hole is an annular hole extending along the entire circumference on the inner circular surface of the brake ring. The second forming hole is located between the first inner boss 8 and the brake surface 11. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is aluminum liquid. The molten metal flows into the second forming hole of the brake ring, that is, the aluminum liquid fills the second forming hole and the mold cavity; during the cooling process, the brake disc body 1 is formed in the mold cavity, and the second connecting member is formed in the second forming hole. The second connecting member is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The second forming hole is used to form the second connecting member, which is a circular ring structure. The second connecting member fits the first inner boss 8 and the first inner circular surface, and the first inner boss 8 is located between the second connecting member and the brake disc body 1. This structural form of the second connecting member can further improve the connection strength between the brake ring and the brake disc body 1, making the processing technology simpler and reducing the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, passing over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0068] As another variant implementation scheme, Fig.14As shown, the friction ring body 3 is an annular structure and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a first inner circular surface, a braking surface 11 and a bonding surface 12 that fits the brake disc body 1. The first inner circular surface is located between the braking surface 11 and the bonding surface 12. The first inner circular surface is a cylindrical surface and the first inner circular surface is coaxially arranged with the braking surface 11 and the bonding surface 12. The diameter of the first inner circular surface is also the inner diameter of the friction ring body 3. One end of the first inner circular surface is vertically connected to the inner edge of the bonding surface 12, and the other end of the first inner circular surface is vertically connected to the inner edge of the braking surface 11. The thickness of the first inner boss 8 is less than the vertical distance between the bonding surface 12 and the braking surface 11 (the vertical distance is also the thickness of the friction ring body 3), and the thickness direction of the first inner boss 8 is parallel to the axis of the friction ring body 3. One first inner boss 8 is provided and the first inner boss 8 is located between the braking surface 11 and the joint surface 12. The first inner boss 8 extends toward the inner side of the first inner circular surface along the radial direction of the friction ring body 3. The first inner boss 8 is an annular structure and the first inner boss 8 and the friction ring body 3 are coaxially fixedly connected. The first inner boss 8 does not extend along the entire circumference of the friction ring body 3. There is a certain distance between the first inner boss 8 and the braking surface 11 and there is also a certain distance between the first inner boss 8 and the braking surface 11, thereby forming two second forming holes, both of which are annular holes extending along the entire circumference on the inner circular surface of the brake ring. The first inner boss 8 is located between the two second forming holes, and one of the second forming holes is located between the first inner boss 8 and the braking surface 11, and the other second forming hole is located between the first inner boss 8 and the joint surface 12. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is aluminum liquid, and the molten metal flows into the second forming hole of the brake ring, that is, the aluminum liquid fills the second forming hole and the mold cavity; during the cooling process, the brake disc body 1 is formed in the mold cavity, and the second connecting piece is formed in the second forming hole, and the second connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The second forming hole is used to form the second connecting piece, and a total of two second connecting pieces are formed. The second connecting piece is a circular ring structure, and the second connecting piece fits the first inner boss 8 and the first inner circular surface, and the first inner boss 8 is located between the two second connecting pieces. The two second connecting pieces of this structural form can further enhance the connection strength between the brake ring and the brake disc body 1, making the processing technology simple and reducing the manufacturing difficulty. In addition, during the casting process, the molten metal can flow between the bosses and between the bosses and the friction ring body 3, and pass over the bosses in the axial direction. After the molten metal solidifies, the brake ring and the brake disc body 1 are effectively combined together.

[0069] Embodiment 4

[0070] like Fig.15 and Fig.16As shown, this fourth embodiment provides a floating composite brake disc, including a brake disc body 1 and a brake ring made of cast iron material, the brake ring having a forming hole for accommodating molten metal during the casting process to form a connecting piece that integrates the brake ring and the brake disc body 1 into one body, and the two brake rings have the same structure.

[0071] Specifically, if Fig.15 and Fig.16 As shown, the brake disc body 1 is made of aluminum alloy material. During the casting process, two brake rings are placed in the mold cavity of the casting device. The molten metal poured into the mold cavity is aluminum liquid. The molten metal flows into the forming hole of the brake ring, and the aluminum liquid fills the forming hole and the mold cavity. During the cooling process, the brake disc body 1 is formed in the mold cavity, and a connecting piece is formed in the forming hole. The connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one body to form a brake disc. With this structure, by optimizing the structure of the brake ring, a connecting piece connecting the brake ring and the brake disc body 1 can be formed during the casting process, which not only improves the bonding strength of aluminum and iron, but also, compared with the brake disc of the prior art, the connecting ribs connecting the two brake rings can be eliminated, further reducing the weight of the cast aluminum brake disc, reducing the manufacturing difficulty of the cast iron brake ring, and also reducing the manufacturing difficulty of the brake disc.

[0072] like Fig.15As shown, the brake ring is a circular ring structure, the brake disc body 1 is located between the two brake rings, and the brake disc body 1 and the brake ring are coaxially fixedly connected, and the brake disc body 1 is used to be installed on the wheel. The brake ring has a bonding surface 12 and a braking surface 11, and the braking surface 11 and the bonding surface 12 are both planes perpendicular to the axis of the brake ring. The braking surface 11 is used to contact the brake pad of the brake caliper assembly to generate braking force. The bonding surface 12 is in contact with the brake disc body 1, and the bonding surface 12 and the braking surface 11 are coaxially arranged, and the bonding surface 12 and the braking surface 11 are opposite sides of the brake ring. The brake ring includes a friction ring body 3 and a first boss 15 and a second boss 16 arranged on the friction ring body 3. The friction ring body 3 is a circular ring structure, and the brake disc body 1 and the friction ring body 3 are coaxially fixedly connected. The friction ring body 3 includes a braking surface 11, an outer cylindrical surface, an inner cylindrical surface, and a bonding surface 12 in contact with the brake disc body 1. The outer and inner surfaces are both cylindrical surfaces. The outer surface is coaxial with the joint surface 12 and the braking surface 11, and the diameter of the outer surface is also the outer diameter of the friction ring body 3. One end of the outer surface is vertically connected to the outer edge of the joint surface 12, and the other end of the outer surface is vertically connected to the outer edge of the braking surface 11. The inner surface is coaxial with the outer surface, and the diameter of the inner surface is also the inner diameter of the friction ring body 3. One end of the inner surface is vertically connected to the inner edge of the joint surface 12, and the other end of the inner surface is vertically connected to the inner edge of the outer step surface 13. The first boss 15 and the second boss 16 protrude toward the same side of the joint surface 12 of the friction ring body 3. Both the first boss 15 and the second boss 16 are annular structures and extend along the entire circumference of the friction ring body 3 on the joint surface 12 of the friction ring body 3. The diameter of the first boss 15 is greater than the diameter of the second boss 16 and the first boss 15 and the second boss 16 are coaxially arranged with the friction ring body 3. In the radial direction of the friction ring body 3, the first boss 15 is at a certain distance from the outer circumferential surface of the friction ring body 3, and the second boss 16 is at a certain distance from the inner circumferential surface of the friction ring body 3. The forming hole includes a first groove between the first boss 15 and the second boss 16, a second groove between the first boss 15 and the outer circumferential surface of the friction ring body 3, a third groove arranged on the first boss 15, a fourth groove between the second boss 16 and the inner circumferential surface of the friction ring body 3, and a fifth groove arranged on the second boss 16. The first groove, the second groove, and the fourth groove are all annular grooves and the first groove, the second groove, and the fourth groove are coaxial. The third groove is a groove arranged on the outer wall surface of the first boss 15 and the third groove is an annular groove extending along the entire circumference on the outer wall surface of the first boss 15. The fifth groove is a groove arranged on the outer wall surface of the second boss 16 and the fifth groove is an annular groove extending along the entire circumference on the outer wall surface of the second boss 16. The third groove is connected to the second groove, and the fifth groove is connected to the fourth groove.In this way, during the casting process, two brake rings are placed in the mold cavity of the casting device, and the molten metal poured into the mold cavity is aluminum liquid, which flows into the first groove, the second groove, the third groove, the fourth groove and the fifth groove of the brake ring, that is, the aluminum liquid fills the forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, and a connecting piece is formed in the forming hole, the connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc. The forming hole is used to form a connecting piece, and the first connecting piece includes a first connecting part, a second connecting part, a third connecting part, a fourth connecting part and a fifth connecting part. The first groove of the brake ring is used to form the first connecting part, the second groove of the brake ring is used to form the second connecting part, the third groove of the brake ring is used to form the third connecting part, the fourth groove of the brake ring is used to form the fourth connecting part, and the fifth groove of the brake ring is used to form the fifth connecting part. The first connecting part is located between the first boss 15 and the second boss 16 and is fixedly connected to the first boss 15, the second boss 16 and the friction ring body 3. The second connection part is located between the first boss 15 and the outer cylindrical surface of the friction ring body 3 and is fixedly connected to the first boss 15 and the friction ring body 3. The third connection part is located inside the first boss 15 and is fixedly connected to the first boss 15 and the second connection part. The fourth connection part is located between the second boss 16 and the inner cylindrical surface of the friction ring body 3 and is fixedly connected to the second boss 16 and the friction ring body 3. The fifth connection part is located inside the second boss 16 and is fixedly connected to the second boss 16 and the fourth connection part. The first connection part, the second connection part and the fourth connection part are all fixedly connected to the brake disc body 1. By arranging grooves on the boss, the iron and aluminum are combined together after the aluminum liquid solidifies, and the iron and aluminum are staggered and can be effectively combined together. This structural form of the connector can further improve the connection strength between the brake ring and the brake disc body 1, making the processing technology simple and reducing the manufacturing difficulty.

[0073] As a variant implementation scheme, Fig.15 and Fig.16As shown, the brake ring further includes a first boss 15 and a second boss 16 disposed on the friction ring body 3, the first boss 15 and the second boss 16 protrude toward the same side of the joint surface 12 of the friction ring body 3, a plurality of first bosses 15 are provided and all the first bosses 15 are arranged in sequence along the circumferential direction on the joint surface 12 of the friction ring body 3, a plurality of second bosses 16 are provided and all the second bosses 16 are arranged in sequence along the circumferential direction on the joint surface 12 of the friction ring body 3, in the radial direction of the friction ring body 3, the first boss 15 is at a certain distance from the outer circumferential surface of the friction ring body 3, the second boss 16 is at a certain distance from the inner circumferential surface of the friction ring body 3, and the distance between the first boss 15 and the axis of the friction ring body 3 is greater than the distance between the second boss 16 and the axis of the friction ring body 3. The first boss 15 and the second boss 16 are both cylindrical structures, the axes of the first boss 15 and the second boss 16 are parallel to the axis of the friction ring body 3, and the lengths of the first boss 15 and the second boss 16 are the same. All first bosses 15 are evenly distributed along the circumferential direction on the joint surface 12 of the friction ring body 3 with the axis of the friction ring body 3 as the center line, and all second bosses 16 are evenly distributed along the circumferential direction on the joint surface 12 of the friction ring body 3 with the axis of the friction ring body 3 as the center line. The diameter of the circumference where all first bosses 15 are located is greater than the diameter of the circumference where all second bosses 16 are located. The forming hole includes a first groove located between the first boss 15 and the second boss 16, a second groove located between the first boss 15 and the outer circumferential surface of the friction ring body 3, a third groove arranged on the first boss 15, a fourth groove located between the second boss 16 and the inner circumferential surface of the friction ring body 3, a fifth groove arranged on the second boss 16, a sixth groove located between every two first bosses 15 adjacent to each other in the circumferential direction, and a seventh groove located between every two second bosses 16 adjacent to each other in the circumferential direction. The first groove, the second groove and the fourth groove are all annular grooves and the first groove, the second groove and the fourth groove are coaxial. The third groove is a groove arranged on the outer wall surface of the first boss 15, the fifth groove is a groove arranged on the outer wall surface of the second boss 16, the third groove is connected to the second groove, the fifth groove is connected to the fourth groove, a sixth groove is formed between each adjacent two first bosses 15 in the circumferential direction, a seventh groove is formed between each adjacent two second bosses 16 in the circumferential direction, the sixth groove is connected to the first groove and the second groove, and the seventh groove is connected to the first groove and the fourth groove. In this way, during the casting process, the two brake rings are placed in the mold cavity of the casting device, the molten metal poured into the mold cavity is aluminum liquid, and the molten metal flows into the first groove, the second groove, the third groove, the fourth groove, the fifth groove, the sixth groove and the seventh groove of the brake ring, that is, the aluminum liquid fills the forming hole and the mold cavity; during the cooling process, a brake disc body 1 is formed in the mold cavity, a connecting piece is formed in the forming hole, the connecting piece is fixedly connected to the brake disc body 1, and the brake ring and the brake disc body 1 are combined into one to form a brake disc.The formed hole is used to form a connecting piece, the first connecting piece includes a first connecting part, a second connecting part, a third connecting part, a fourth connecting part, a fifth connecting part, a sixth connecting part and a seventh connecting part, the first groove of the brake ring is used to form the first connecting part, the second groove of the brake ring is used to form the second connecting part, the third groove of the brake ring is used to form the third connecting part, the fourth groove of the brake ring is used to form the fourth connecting part, the fifth groove of the brake ring is used to form the fifth connecting part, the sixth groove of the brake ring is used to form the sixth connecting part, and the seventh groove of the brake ring is used to form the seventh connecting part.

[0074] The first connecting portion is located between the first boss 15 and the second boss 16 and is fixedly connected to the first boss 15, the second boss 16 and the friction ring body 3. The second connecting portion is located between the first boss 15 and the outer circumferential surface of the friction ring body 3 and is fixedly connected to the first boss 15 and the friction ring body 3. The third connecting portion is located inside the first boss 15 and is fixedly connected to the first boss 15 and the second connecting portion. The fourth connecting portion is located between the second boss 16 and the inner circumferential surface of the friction ring body 3 and is fixedly connected to the second boss 16 and the friction ring body 3. The fifth connecting portion is located inside the second boss 16 and is fixedly connected to the second boss 16 and the fourth connecting portion. The sixth connecting portion is located between each two adjacent first bosses 15. The seventh connecting portion is located between each two adjacent second bosses 16. The first connecting portion, the second connecting portion, the fourth connecting portion, the sixth connecting portion and the seventh connecting portion are all fixedly connected to the brake disc body 1. By setting grooves on the boss, the iron and aluminum are combined together after the aluminum liquid solidifies, and the iron and aluminum are staggered and can be effectively combined together. This structural form of the connector can further improve the connection strength between the brake ring and the brake disc body 1, making the processing technology simpler and reducing the manufacturing difficulty.

[0075] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A floating composite brake disc, comprising a brake disc body and a brake ring, characterized in that: The brake ring has a forming hole for receiving molten metal during the casting process to form a connecting piece that integrates the brake ring with the brake disc body; The brake ring comprises a friction ring body and a first outer boss arranged on the friction ring body, wherein a plurality of first outer bosses are provided and all the first outer bosses are arranged in sequence along the circumferential direction on the first outer circumferential surface of the friction ring body; The friction ring body includes a braking surface, a second outer cylindrical surface, an outer step surface connected to the first outer cylindrical surface and the second outer cylindrical surface, and a joint surface fitted with the brake disc body, the first outer cylindrical surface is coaxial with the second outer cylindrical surface and the diameter of the first outer cylindrical surface is smaller than the diameter of the second outer cylindrical surface, there is a distance between the first outer boss and the outer step surface, and the forming hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction and a second outer containing groove located between the first outer boss and the outer step surface.

2. The floating composite brake disc according to claim 1, characterized in that: The forming hole is a conical hole and a plurality of forming holes are provided. The connecting piece is a conical structure. The small diameter end of the connecting piece is fixedly connected to the brake disc body. The large diameter end of the connecting piece is located in the forming hole and the diameter of the large diameter end of the connecting piece is larger than the diameter of the small diameter end.

3. The floating composite brake disc according to claim 1, characterized in that: The friction ring body includes a braking surface and a mating surface that fits the brake disc body, the first outer cylindrical surface is located between the braking surface and the mating surface, there is a distance between the first outer boss and the braking surface, and the formed hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction and a second outer containing groove located between the first outer boss and the braking surface.

4. The floating composite brake disc according to claim 1, characterized in that: The brake ring also includes a second outer boss arranged on the friction ring body, a plurality of second outer bosses are provided and all the second outer bosses are arranged in sequence along the circumferential direction on the first outer circumferential surface of the friction ring body, the first outer bosses and the second outer bosses are staggered, and the forming hole includes a first outer containing groove located between every two first outer bosses adjacent in the circumferential direction, a second outer containing groove located between the first outer boss and the second outer boss, and a third outer containing groove located between every two second outer bosses adjacent in the circumferential direction.

5. The floating composite brake disc according to claim 1, characterized in that: The friction ring body includes a braking surface and a bonding surface that is in contact with the brake disc body, the first outer cylindrical surface is located between the braking surface and the bonding surface, and there is a distance between the first outer boss and the braking surface and the bonding surface. The formed hole includes a first outer containing groove located between every two first outer bosses adjacent to each other in the circumferential direction, a second outer containing groove located between the first outer boss and the braking surface, and a third outer containing groove located between the first outer boss and the bonding surface.

6. The floating composite brake disc according to any one of claims 1 to 5, characterized in that: The brake ring further comprises a first inner boss and / or a second inner boss arranged on the friction ring body, a plurality of first inner bosses are provided and all the first inner bosses are arranged in sequence along the circumferential direction on the first inner circumferential surface of the friction ring body, a plurality of second inner bosses are provided and all the second inner bosses are arranged in sequence along the circumferential direction on the first inner circumferential surface of the friction ring body; Or the friction ring body includes a braking surface, a second inner circular surface, a bonding surface that fits the brake disc body, and an inner step surface connected to the first inner circular surface and the second inner circular surface, the first inner circular surface is coaxial with the second inner circular surface and the diameter of the first inner circular surface is greater than the diameter of the second inner circular surface, there is a distance between the first inner boss and the inner step surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction and a second content groove located between the first inner boss and the inner step surface; Or the friction ring body includes a braking surface and a bonding surface that fits the brake disc body, the first inner circular surface is located between the braking surface and the bonding surface, there is a distance between the first inner boss and the braking surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction and a second content groove located between the first inner boss and the braking surface; Or the first inner boss and the second inner boss are staggered, and the forming hole includes a first outer containing groove located between every two first inner bosses adjacent to each other in the circumferential direction, a second inner containing groove located between the first inner boss and the second inner boss, and a third inner containing groove located between every two second inner bosses adjacent to each other in the circumferential direction; Or the friction ring body includes a braking surface and a bonding surface that fits with the brake disc body, the first inner circular surface is located between the braking surface and the bonding surface, the first inner boss is spaced from the braking surface and the bonding surface, and the molded hole includes a first content groove located between every two first inner bosses adjacent to each other in the circumferential direction, a second content groove located between the first inner boss and the braking surface, and a third content groove located between the first inner boss and the bonding surface; Or the brake ring further includes a first inner boss disposed on the friction ring body, and the first inner boss is a circular ring structure.

7. The floating composite brake disc according to claim 1, characterized in that: The brake ring also includes a first boss and a second boss arranged on the friction ring body, the first boss and the second boss protrude toward the same side of the joint surface of the friction ring body, the first boss and the second boss are both annular structures, and the diameter of the first boss is greater than the diameter of the second boss, and the forming hole includes a first groove located between the first boss and the second boss, a second groove located between the first boss and the outer circumferential surface of the friction ring body, a third groove arranged on the first boss, a fourth groove located between the second boss and the inner circumferential surface of the friction ring body, and a fifth groove arranged on the second boss.

8. The floating composite brake disc according to claim 1, characterized in that: The brake ring further comprises a first boss and a second boss arranged on the friction ring body, the first boss and the second boss protrude toward the same side of the joint surface of the friction ring body, a plurality of first bosses are provided and all the first bosses are arranged in sequence along the circumferential direction on the joint surface of the friction ring body, a plurality of second bosses are provided and all the second bosses are arranged in sequence along the circumferential direction on the joint surface of the friction ring body, and the forming hole comprises a first groove located between the first boss and the second boss, a second groove located between the first boss and the outer circumferential surface of the friction ring body, a third groove located on the first boss, a fourth groove located between the second boss and the inner circumferential surface of the friction ring body, a fifth groove located on the second boss, a sixth groove located between every two circumferentially adjacent first bosses, and a seventh groove located between every two circumferentially adjacent second bosses.

9. The floating composite brake disc according to any one of claims 1 to 5, 7 to 8, characterized in that: The brake ring is made of gray iron and the brake disc body is made of aluminum.

10. The floating composite brake disc according to claim 6, characterized in that: The brake ring is made of gray iron and the brake disc body is made of aluminum.

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