Composite brake disc

Abstract

The utility model discloses a composite brake disc, which belongs to the technical field of automobile key parts and comprises a disc hub and a friction ring, the disc hub is a stamping part, the friction ring is a casting part, and the disc hub and the friction ring are connected through casting. An opening at one end of the disc hub is an open end, an annular flange is arranged at the open end of the disc hub, and the friction ring is assembled at the open end of the disc hub through the annular flange. According to the composite disc, the disc hub is connected with the friction ring in a casting mode, the friction ring is assembled at the open end of the disc hub through the annular flange, and the problems that an existing composite disc is low in strength, prone to deformation, complex in process and high in machining cost in a riveting assembly mode are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile key parts, and particularly relates to a composite brake disc. BACKGROUND

[0002] At present, the disc hub and the friction ring of the composite brake disc on the market are mostly connected through riveting, and the riveting process is roughly divided into two categories: one kind is that a side stamping port (i.e. a riveting protrusion) is first stamped on the disc hub, then the friction ring is inserted and pressed into the disc hub, and then the skirt edge of the open end of the disc hub is side-stamped to form a boss, so as to realize axial fixation; the other kind is that a pin hole is formed on the side wall of the inner hole of the friction ring and the disc hub along the circumference, and the disc hub and the friction ring are riveted by high-strength pins.

[0003] The riveting process of the first kind, in which the boss structure is side-stamped on the skirt edge of the open end of the disc hub after assembly to realize axial fixation, has a small positioning contact area between the boss structure and the friction ring, a weak axial force bearing capacity, and unreliable axial locking. The riveting process of the second kind requires that a pin hole structure be formed on the friction ring and the disc hub before assembly. In order to ensure reliable riveting, the pin hole precision is required to be high, but the hole machining often fails to meet the required precision, resulting in defects such as an increased hole diameter, a position deviation, and an oval hole, which leads to inaccurate positioning of the disc hub and the friction ring. The pins are unevenly stressed, which further affects the connection strength and reduces the connection strength. In addition, the riveting process requires a high-quality pin material, and the connection strength is often reduced due to plastic deformation and uneven stress distribution of the material during riveting. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a composite brake disc, which solves the problems of low strength, easy deformation, complex process, and high processing cost of the riveting assembly mode of the existing composite disc.

[0005] The technical scheme for solving the above technical problem is as follows:

[0006] A composite brake disc, comprising a disc hub and a friction ring, wherein the disc hub is a stamped part, the friction ring is a cast part, and the disc hub and the friction ring are connected through casting; one end of the disc hub is provided with an open end, the open end of the disc hub is provided with an annular flange, and the friction ring is assembled in the open end of the disc hub through the annular flange.

[0007] The annular flange provided on the open end of the disc hub is similar to a bent flange structure, which can realize accurate positioning of the axial one (the closed end of the disc hub) when the disc hub is inserted into the sand core of the friction ring during casting and assembly, and can also realize positioning and fixation of the axial one (the closed end of the disc hub) when the disc hub is stressed. The disc hub and the friction ring are connected through casting, and the friction ring is assembled in the open end of the disc hub through the annular flange, which solves the problems of low strength, easy deformation, complex process, and high processing cost of the riveting assembly mode of the existing composite disc.

[0008] Further, the outer side wall of the disc hub is circumferentially provided with a plurality of convex teeth, and the inner side wall of the friction ring is circumferentially provided with a plurality of concave teeth, which are matched with the convex teeth.

[0009] The beneficial effect of the above technical solution is that the plurality of convex teeth on the outer side wall of the disc hub and the plurality of concave teeth on the inner side wall of the friction ring are matched with each other, which can increase the casting engagement area of the disc hub and the friction ring, thereby increasing the bonding area and bonding strength, and preventing the movement of the friction ring in the radial direction, accurately positioning the position of the friction ring, and greatly improving the anti-circumferential torsion performance of the disc hub and the friction ring after engagement.

[0010] Further, the cross section of the convex teeth is semicircular.

[0011] The beneficial effect of the above technical solution is that the convex teeth with a semicircular cross section can improve the engagement strength and precision of the disc hub and the friction ring.

[0012] Further, the number of the convex teeth and the concave teeth is 36.

[0013] Further, the outer side wall of the disc hub is circumferentially provided with an annular groove, and the inner side wall of the friction ring is circumferentially provided with an annular boss, which is engaged with the annular groove.

[0014] The beneficial effect of the above technical solution is that the annular groove can fill the molten iron when casting, which can not only improve the bonding strength between the disc hub and the friction ring, but also realize the limiting and fixing of the axial two (the opening end of the disc hub) of the disc hub when it is under stress; the boss is engaged with the groove, which can not only prevent the movement of the friction ring in the axial direction and accurately position the position of the friction ring, but also improve the bonding degree between the disc hub and the friction ring.

[0015] Further, the annular groove is provided at one end of the disc hub close to the annular flange.

[0016] The beneficial effect of the above technical solution is that it is convenient to assemble the friction ring at the opening end of the disc hub.

[0017] Further, the width of the annular groove is 8-10mm, and the depth is 1.2-1.5mm.

[0018] Further, the width of the annular groove is 10mm.

[0019] Further, the lower plane of the annular flange is a high-precision plane with a flatness within 0.01mm.

[0020] The beneficial effect of the above technical scheme is that the lower plane of the annular flange is made into a high-precision plane, which is used to ensure that the plane of the annular flange of the disc hub is closely combined with the positioning plane of the core box, so that the molten iron does not seep out of the combined surface when the molten iron is poured, and defects such as flash burrs are formed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a sectional view schematic diagram of disc hub and friction ring assembly in the utility model;

[0022] Figure 2 It is a top view schematic diagram of disc hub and friction ring assembly in the utility model;

[0023] Figure 3 It is a sectional view structure schematic diagram of disc hub in the utility model;

[0024] Figure 4 It is a sectional view structure schematic diagram of friction ring in the utility model.

[0025] The figure mark explanation: 1, disc hub;2, friction ring;3, open end;4, annular flange;5, convex tooth;6, concave tooth;7, annular groove;8, annular boss. DETAILED DESCRIPTION

[0026] The following combines the drawings Figures 1-4 The principle and characteristics of the utility model are described, and the examples are only used to explain the utility model, and are not used to limit the scope of the utility model.

[0027] The utility model embodiment discloses a composite brake disc.

[0028] Refer to Figures 1-4 A composite brake disc, comprising disc hub 1 and friction ring 2, the disc hub 1 is the stamping piece that adopts steel plate stamping, the friction ring 2 is the castings that gray iron pours, the disc hub 1 and friction ring 2 realize connection through casting process.

[0029] The open end 3 is provided at one end of the disc hub 1, the open end 3 of the disc hub 1 is integrally provided with annular flange 4, and the annular flange 4 is similar to the bending flange structure, which is used to realize the accurate positioning of the disc hub 1 when the disc hub 1 is inserted into the sand core of the friction ring 2 in the axial direction one (the closed end of the disc hub 1), and also realize the positioning and fixing of the disc hub 1 in the axial direction one (the closed end of the disc hub 1) when the disc hub 1 is stressed.

[0030] The lower plane of the annular flange 4 is a high-precision plane, and the flatness is within 0.01mm, which is used to ensure that the plane of the annular flange 4 of the disc hub 1 is closely combined with the positioning plane of the core box, so that the molten iron does not seep out of the combined surface when the molten iron is poured, and defects such as flash burrs are formed.

[0031] The disc hub 1 is connected with the friction ring 2 by casting, and the friction ring 2 is assembled to the open end 3 of the disc hub 1 through the annular flange 4, thereby solving the problems of low strength, easy deformation, complex process, and high processing cost of the riveting assembly mode of the existing composite disc.

[0032] The outer side wall of the disc hub 1 is uniformly provided with a plurality of convex teeth 5 along the circumference, and the inner side wall of the friction ring 2 is uniformly provided with a plurality of concave teeth 6 along the circumference, and specifically, the convex teeth 5 and the concave teeth 6 are each provided with 36 teeth. The plurality of convex teeth 5 of the outer side wall of the disc hub 1 and the plurality of concave teeth 6 of the inner side wall of the friction ring 2 are mutually engaged and assembled, which can increase the casting engagement area of the disc hub 1 and the friction ring 2, thereby increasing the bonding area and bonding strength of the two, and can prevent the movement of the friction ring in the radial direction, accurately position the position of the friction ring, and greatly improve the anti-circumferential torsion performance of the disc hub 1 and the friction ring 2 after engagement.

[0033] The cross section of the convex tooth 5 is semicircular, which can improve the engagement strength and precision of the disc hub 1 and the friction ring 2.

[0034] The outer side wall of the disc hub 1 is provided with an annular groove 7 along the circumference, the inner side wall of the friction ring 2 is provided with an annular boss 8 along the circumference, and the annular boss 8 is engaged with the annular groove 7. The width of the annular groove 7 is 8-10mm, and the depth is 1.2-1.5mm, and specifically, the width of the annular groove 7 is 10mm. The annular groove 7 is filled with molten iron during casting, which can improve the bonding strength between the disc hub 1 and the friction ring 2, and can also realize the limiting and fixing of the disc hub 1 in the axial direction (the open end 3 of the disc hub 1) under stress; the boss and the groove are engaged, which can prevent the movement of the friction ring in the axial direction, accurately position the position of the friction ring, and also can improve the bonding degree between the disc hub 1 and the friction ring 2.

[0035] The annular groove 7 is arranged at one end of the disc hub 1 close to the annular flange 4, which is convenient for assembling the friction ring 2 to the open end 3 of the disc hub 1.

[0036] The composite brake disc has high bonding strength, good heat dissipation, simple manufacturing, and low processing cost, and achieves the purposes of high performance and light weight.

[0037] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A composite brake disc, comprising a disc hub (1) and a friction ring (2), characterized in that: The hub (1) is a stamped part, and the friction ring (2) is a cast part. The hub (1) and the friction ring (2) are connected by casting. One end of the hub (1) is set as an open end (3). The open end (3) of the hub (1) is provided with an annular flange (4). The friction ring (2) is assembled to the open end (3) of the hub (1) through the annular flange (4).

2. The composite brake disc according to claim 1, characterized in that: The outer sidewall of the hub (1) is evenly distributed with a plurality of convex teeth (5) along the circumference, and the inner sidewall of the friction ring (2) is evenly distributed with a plurality of concave teeth (6) along the circumference, and the concave teeth (6) are adapted to the convex teeth (5).

3. A composite brake disc according to claim 2, characterized in that: The cross-section of the protruding tooth (5) is semi-circular.

4. A composite brake disc according to claim 1, characterized in that: The outer sidewall of the hub (1) is provided with an annular groove (7) along the circumference, and the inner sidewall of the friction ring (2) is provided with an annular boss (8) along the circumference. The annular boss (8) is engaged with the annular groove (7).

5. A composite brake disc according to claim 4, characterized in that: The annular groove (7) is formed at one end of the hub (1) near the annular flange (4).

6. A composite brake disc according to claim 4, characterized in that: The width of the annular groove (7) is 8-10 mm and the depth is 1.2-1.5 mm.

7. A composite brake disc according to claim 6, characterized in that: The width of the annular groove (7) is 10 mm.

8. A composite brake disc according to claim 1, characterized in that: The lower plane of the annular flange (4) is a high-precision plane with a flatness within 0.01 mm.

Images