Disc hub, friction ring and composite brake disc

Abstract

The utility model belongs to the technical field of automobile part manufacturing, and particularly relates to a disc hub, a friction ring and a composite brake disc, the disc hub comprises a disc hub body, and an annular flange is arranged at the open end of the disc hub body. The friction ring comprises a friction ring body, a groove is formed in the lower end face of the friction ring body, and the groove is annularly formed along a center hole of the friction ring body. The composite brake disc comprises the disc hub and a friction ring. According to the composite brake disc, the reliability of axial stress and axial locking of the disc hub is improved, the assembling reliability and applicability of the composite brake disc are improved, and the technical problems of high machining cost and high process difficulty are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a disc hub, friction ring and composite brake disc belong to automobile parts manufacturing technical field. BACKGROUND

[0002] The disc hub structure of the composite brake disc on the market at present is divided into two kinds: one is that the disc hub is first side-punched to form a mouth (i.e. riveting convex), then inserted into the friction ring to press-fit, and then the skirt edge of the open end of the disc hub is side-punched to form a boss to realize axial fixation; the other is that the disc hub is first side-punched to form a mouth, then side-punched to form a strip-shaped hole to form a clamping groove, then inserted into the friction ring to press-fit, and finally side-punched to form a buckle to realize axial fixation. The first kind of process realizes axial fixation by side-punching the skirt edge of the open end of the disc hub to form a boss after assembly, the contact area of the boss structure with the positioning of the friction ring is small, the axial force bearing capacity is weak, and the axial locking is unreliable. The second kind of disc hub structure needs to form a clamping groove structure by blanking a strip-shaped hole on the disc hub before assembly, and then side-punches a buckle at the position of the strip-shaped hole to realize axial fixation after assembly, so the disc hub manufacturing process is complex. The above two methods increase the processing cost and the process difficulty, in addition, the end face of the friction ring matched with the disc hub is a flat surface, and when the rivet is pressed, due to the certain springback of the disc hub material, a gap may occur between the friction ring and the pressing mouth on the disc hub, which causes the axial locking to be not tight, and affects the durability of the brake disc. SUMMARY

[0003] In view of the above defects of the prior art, the utility model provides a disc hub, friction ring and composite brake disc, increases the axial force bearing capacity and axial locking reliability of the disc hub, improves the assembly reliability and applicability of the composite brake disc, and solves the technical problems of high processing cost and great process difficulty in the prior art.

[0004] The technical scheme for solving the above technical problems of the utility model is as follows:

[0005] One of the purposes of the utility model is to provide a disc hub, which comprises a disc hub body, and an annular flange is arranged at the open end of the disc hub body.

[0006] The beneficial effects of the above technical scheme of the utility model are as follows: the disc hub of the utility model is provided with an annular flange at the open end, which is similar to a bent flange structure, the positioning contact area of the disc hub and the friction ring is increased, the axial force bearing capacity is increased, and the assembly reliability is improved; this structure can be realized simultaneously when the disc hub is stretched, and when press-fitted, the disc hub flange lower end surface and the friction ring upper end surface are directly contacted, so it is not necessary to increase the skirt edge side-punched boss to realize axial fixation after press-fitting, and it is also not necessary to pre-side-punch a clamping groove structure on the disc hub, and then side-punch a buckle at the position of the strip-shaped hole to realize axial fixation after press-fitting, so the mold cost is saved, and the disc hub manufacturing process is simplified.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows:

[0008] Further, the included angle formed by the lower end surface of the flange and the plane where the open end of the hub body is located is 1°-3°.

[0009] The beneficial effects of adopting the further technical scheme are that the lower end surface of the flange is a downward inclined surface with an included angle of 1°-3°, which can effectively avoid the situation that the axial tension of the flange of the hub causes the flange to be raised, resulting in that the end surface is not completely attached and the positioning and locking effect is poor, further improves the assembly and riveting positioning reliability, and improves the product quality.

[0010] Further, the side surface of the hub body is uniformly distributed with a plurality of matching convex teeth along the circumference, and the cross section of the matching convex teeth is semicircular.

[0011] The beneficial effects of adopting the further technical scheme are that the semicircular structure is beneficial to material stretching, and the semicircular matching convex teeth bear a greater circumferential torsion force than the existing trapezoidal teeth, are engaged and interlocked with the matching tooth grooves on the friction ring, realize rotation fixation in the circumferential direction, and increase the circumferential torsion force of the brake disc.

[0012] Further, the bottom of the hub body is provided with a positioning center hole.

[0013] The second purpose of the utility model is to provide a friction ring matched with the hub, which comprises a friction ring body, a groove is arranged on the lower end surface of the friction ring body, and the groove is arranged annularly along the center hole of the friction ring body.

[0014] The beneficial effects of the above technical scheme of the utility model are that the lower end surface of the friction ring of the utility model is provided with a groove, when the hub is pressed and assembled and the flange riveting protrusion is riveted by side punching, the punch extrudes the material to flow into the groove along the lower end surface of the friction ring to form material accumulation and filling, the hub riveting protrusion end part is bent inward, the friction ring and the hub are firmly locked in the axial and radial directions, and the assembly reliability and the use performance of the brake disc are improved.

[0015] On the basis of the above technical scheme, the utility model can also be improved as follows:

[0016] Further, the groove wall is in a conical surface structure, and the included angle between the conical surface and the lower end surface of the friction ring body is 12°-15°.

[0017] Further, the depth of the groove is 0.08㎜-0.12㎜.

[0018] The beneficial effect of adopting the further technical scheme is that, when the side punch riveting protrusion is riveted, the punch extrudes the material along the taper surface with an inclination of 12-15 degrees and a depth of 0.08-0.12 mm to flow into the groove to form material accumulation, so that the material flow is smoother, and the end of the disc hub riveting protrusion is more easily bent inward.

[0019] Further, the inner side of the central hole of the friction ring body is circumferentially provided with a plurality of matching tooth grooves, and the cross section of the matching tooth groove is semicircular.

[0020] The beneficial effect of adopting the further technical scheme is that: the disc hub and the friction ring are interlocked by the semicircular tooth shape, rotation in the circumferential direction is fixed, and the circumferential torsion of the brake disc is increased.

[0021] The third purpose of the utility model is to provide a composite brake disc comprising the disc hub and the friction ring.

[0022] The beneficial effect of the above technical scheme of the utility model is that: the composite brake disc of the utility model has the advantages of convenient processing, simple structure and simple manufacturing process, the contact area of the disc hub and the friction ring is increased by the annular flange, and the assembly reliability is improved; the friction ring has the advantage of improving the locking force of the friction ring and the disc hub in the axial and radial directions, and the assembly reliability and use performance of the brake disc are further improved.

[0023] On the basis of the above technical scheme, the utility model can also be improved as follows:

[0024] Further, the disc hub is inserted into the central hole of the friction ring, the matching convex teeth of the disc hub are clamped with the matching tooth grooves of the friction ring, and the lower end surface of the flange of the disc hub abuts against the upper end surface of the friction ring.

[0025] Further, a plurality of riveting protrusions are provided on the side surface of the disc hub body in a circumferential direction, and the riveting protrusions are arranged in the groove of the friction ring.

[0026] The beneficial effect of adopting the further technical scheme is that: a plurality of riveting protrusions are punched on the side surface of the disc hub, material accumulation is formed in the groove of the friction ring, locking in the axial and radial directions of the disc hub is provided, and the assembly reliability and product performance of the composite brake disc are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the disc hub of the utility model;

[0028] Figure 2 It is a front view of the disc hub of the utility model;

[0029] Figure 3This is a schematic diagram of the three-dimensional structure of the disk hub of the present invention from another angle;

[0030] Figure 4 It is a top view of the disc hub of the present utility model;

[0031] Figure 5 This is a top view of the friction ring of the present invention;

[0032] Figure 6 This is a cross-sectional view of the friction ring of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of the structure at point A;

[0034] Figure 8 It is a cross-sectional view of the composite brake disc of the present utility model;

[0035] Figure 9 for Figure 8 A magnified view of the structure at point B.

[0036] The reference numerals are recorded as follows: 100, hub body; 101, flange; 102, mating protruding teeth; 103, positioning center hole; 104, sealing rivet protrusion; 200, friction ring body; 201, groove; 202, conical surface; 203, mating tooth groove. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0038] Example 1

[0039] like Figures 1-4 As shown, a hub comprises a hub body 100, wherein the open end of the hub body 100 is provided with an annular flange 101. The angle formed by the lower end surface of the flange 101 and the plane where the open end of the hub body 100 is located is 1°-3°. Specifically, in this embodiment, the angle is 2°. The side surface of the hub body 100 is evenly distributed along the circumference with a plurality of mating protruding teeth 102. Specifically, in this embodiment, the mating protruding teeth 102 are provided with 36, and the cross section of the mating protruding teeth 102 is semicircular. The bottom of the hub body 100 is provided with a positioning center hole 103.

[0040] The disc hub of this embodiment is processed by a stamping die. The upper template moves downward to press the surface of the sheet, and the lower punch presses the sheet into the die. When the die moves to the closed position, an annular flange 101 structure with an outward flange is pressed out at the edge. In order to avoid the upper template from stretching and warping, the die is made into a -2° compensation shape.

[0041] Example 2

[0042] As Figures 5-7 shown in FIG. 1, a friction ring matched with the hub of the embodiment 1 comprises a friction ring body 200, the lower end surface of the friction ring body 200 is provided with a groove 201, the groove 201 is annularly arranged along the central hole of the friction ring body 200. The groove wall of the groove 201 is in the structure of a conical surface 202, the included angle between the conical surface 202 and the lower end surface of the friction ring body 200 is 12°-15°, and the depth of the groove is 0.08㎜-0.12㎜. Specifically, in the embodiment, the included angle between the conical surface 202 and the lower end surface of the friction ring body 200 is 13°, and the groove depth of the groove 201 is 0.10㎜. The inner side surface of the central hole of the friction ring body 200 is uniformly distributed with a plurality of matching tooth grooves 203 along the circumference, specifically, in the embodiment, the matching tooth grooves 203 are provided with 36, and the cross section of the matching tooth grooves 203 is semicircular.

[0043] Embodiment 3

[0044] As Figures 8-9 shown in FIG. 1, a friction ring matched with the hub of the embodiment 1 comprises a friction ring body 200, the lower end surface of the friction ring body 200 is provided with a groove 201, the groove 201 is annularly arranged along the central hole of the friction ring body 200. The groove wall of the groove 201 is in the structure of a conical surface 202, the included angle between the conical surface 202 and the lower end surface of the friction ring body 200 is 12°-15°, and the depth of the groove is 0.08㎜-0.12㎜. Specifically, in the embodiment, the included angle between the conical surface 202 and the lower end surface of the friction ring body 200 is 13°, and the groove depth of the groove 201 is 0.10㎜. The inner side surface of the central hole of the friction ring body 200 is uniformly distributed with a plurality of matching tooth grooves 203 along the circumference, specifically, in the embodiment, the matching tooth grooves 203 are provided with 36, and the cross section of the matching tooth grooves 203 is semicircular.

[0045] The hub is inserted into the central hole of the friction ring, the matching convex teeth 102 of the hub are clamped with the matching tooth grooves 203 of the friction ring, and the lower end surface of the flange 101 of the hub is in abutment with the upper end surface of the friction ring.

[0046] A plurality of rivet sealing protrusions 104 are arranged on the side surface of the hub body 100 of the hub along the circumference, and the rivet sealing protrusions 104 are arranged in the groove 201 of the friction ring.

[0047] The assembly process of the composite brake disc of the embodiment is as follows:

[0048] (1) The friction ring is placed on the die side slide block, the hub bottom is inserted into the friction ring, the semicircular matching convex teeth 102 on the hub are engaged with the semicircular matching tooth grooves 203 on the friction ring, the rotation in the circumferential direction is fixed, and the hub bottom is placed on the lower stripper plate;

[0049] (2) The upper die goes down, presses the inner end surface of the hub, and continues to go down to the upper die plate to press the friction ring, the lower end surface of the flange 101 of the hub is in contact with the upper end surface of the friction ring, the axial fixation of the hub and the friction ring is realized;

[0050] (3) The friction ring goes down and moves laterally to press the side slide block, and the outer side surface of the hub is clamped and fixed together;

[0051] (4) side punch side movement, along the lower end surface of the friction ring side punch out a plurality of sealing rivet 104, specifically, in the sealing rivet 104 in the present embodiment there are 18, punch extrusion material along the lower end surface of the friction ring on the 13° taper 202 flow into the groove 201 0.10㎜ deep formed material accumulation filling, sealing rivet 104 end to achieve inward bending, thereby realizing the hub and the other end of the friction ring axial fixed.

[0052] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A composite brake disc, characterized in that, The friction ring comprises a disc hub and a friction ring; The disc hub comprises a disc hub body, and an annular flange is arranged at the open end of the disc hub body; the included angle between the lower end surface of the flange and the plane where the open end of the disc hub body is located is 1°-3°; the side surface of the disc hub body is uniformly distributed with a plurality of matching convex teeth along the circumference, and the cross section of the matching convex teeth is semicircular; The friction ring comprises a friction ring body, and a groove is arranged at the lower end surface of the friction ring body; the groove is arranged annularly along the central hole of the friction ring body; the groove wall is in a conical surface structure, and the included angle between the conical surface and the lower end surface of the friction ring body is 12°-15°; the depth of the groove is 0.08㎜-0.12㎜; the inner side surface of the central hole of the friction ring body is uniformly distributed with a plurality of matching tooth grooves along the circumference, and the cross section of the matching tooth grooves is semicircular.

2. The composite brake disc of claim 1, wherein The disc hub is inserted into the central hole of the friction ring, the matching convex teeth of the disc hub are clamped with the matching tooth grooves of the friction ring, and the lower end surface of the flange of the disc hub abuts against the upper end surface of the friction ring.

3. The composite brake disc of claim 2, wherein, A plurality of riveting sealing protrusions are arranged on the side surface of the disc hub body along the circumference, and the riveting sealing protrusions are arranged in the groove of the friction ring.

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