Brake disc

Abstract

The utility model provides a brake disc which comprises a friction ring, a first connecting piece and a second connecting piece. A second connecting piece is annularly arranged on the outer ring of the disc cap, the first connecting piece and the second connecting piece are fixedly connected in the axial direction of the brake disc, the second connecting piece is provided with a plurality of interval parts and a plurality of abutting parts, the interval parts and the abutting parts are annularly arranged at intervals in the circumferential direction of the disc cap, and the abutting parts abut against the first connecting piece; the interval part is located on the side, facing the first connecting piece, of the second connecting piece, the first connecting piece and the second connecting piece form an interval in the axial direction of the brake disc through the interval part, and the second connecting piece can deform through the interval part. By means of the technical scheme, the problem that in the prior art, a split type brake disc is poor in thermal deformation performance can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake discs, and in particular to a brake disc. Background Art

[0002] At present, in the braking system of a vehicle, a brake disc and a brake caliper are usually used to brake the vehicle. The brake disc in the traditional technical solution is usually made of gray cast iron, and the density of gray cast iron is usually 7.2±0.3g / cm 3 The strength ranges from 130Mpa to 300Mpa, which results in a larger overall mass of the brake disc. This not only increases the unsprung mass and reduces maneuverability, but also increases fuel consumption, which does not meet the demand for lightweight vehicles.

[0003] In the prior art, brake discs are typically designed as split discs, with a disc cap and friction ring interconnected. The disc cap is replaced using materials such as steel, aluminum, or aluminum alloys. While maintaining the strength of the brake disc, the thickness of the replacement part can be reduced, thereby reducing the weight of the brake disc and achieving the goal of lightweighting the brake disc. However, the split brake disc generates heat from friction between the brake caliper and the friction ring, which causes the friction ring to deform due to the heat. This results in poor thermal deformation resistance of the brake disc, and the disc is prone to warping or misalignment when mated with the brake caliper, affecting the brake disc's braking performance. Utility Model Content

[0004] The utility model provides a brake disc to solve the problem of poor thermal deformation performance of the split brake disc in the prior art.

[0005] The utility model provides a brake disc, which includes: a friction ring, an inner ring of the friction ring having a first connecting member arranged in an annular manner; a disc cap, an outer ring of the disc cap having a second connecting member arranged in an annular manner, the first connecting member and the second connecting member being fixedly connected in the axial direction of the brake disc, the second connecting member having a plurality of spacers and a plurality of abutting portions, the spacers and the abutting portions being arranged at an annular interval along the circumference of the disc cap, the abutting portions abutting against the first connecting member, the spacers being located on a side of the second connecting member facing the first connecting member, the first connecting member forming a space in the axial direction of the brake disc through the spacers and the second connecting member, and the second connecting member being able to be deformed through the spacers.

[0006] Furthermore, the second connecting member includes: a second connecting block, a plurality of second connecting blocks are provided, and the plurality of second connecting blocks are arranged in annular intervals along the circumference of the disk cap, and the second connecting block has a spacing portion and an abutment portion, and the abutment portion is arranged on both sides of the spacing portion along the circumference of the disk cap.

[0007] Furthermore, the spacer portion and the first connecting member are fixedly connected via a fastener, and the fastener is used to provide a pre-tightening force in opposite directions to the first connecting member and the second connecting block.

[0008] Furthermore, the disc cap and the friction ring are floatingly connected in the radial direction of the brake disc, and the disc cap and the friction ring can move relative to each other in the radial direction.

[0009] Furthermore, a plurality of first connecting holes are provided on the first connecting member, and a second connecting hole is provided on the second connecting block. The plurality of first connecting holes and the plurality of second connecting holes are arranged in one-to-one correspondence. The fasteners are passed through the first connecting holes and the second connecting holes. The fasteners are interference fit with the first connecting holes, and the diameter of the second connecting hole is larger than the diameter of the first connecting hole.

[0010] Furthermore, a countersunk hole is provided at the end of the second connecting hole away from the first connecting member, the fastener includes a rivet, and the countersunk hole is used to accommodate a nail cap of the rivet.

[0011] Furthermore, a spacing groove is provided on the second connecting block, and the spacing groove passes through the second connecting block in the radial direction of the disc cap, and the spacing groove forms a spacing portion.

[0012] Furthermore, the first connecting member includes a plurality of first connecting blocks, which are arranged at annular intervals along the circumference of the friction ring. The plurality of first connecting blocks are arranged in one-to-one correspondence with the plurality of second connecting blocks, and a first weight-reducing groove is formed between two adjacent first connecting blocks.

[0013] Furthermore, a second weight-reducing groove is formed between two adjacent second connecting blocks, and at least a portion of the first weight-reducing groove is communicated with the second weight-reducing groove.

[0014] Furthermore, the first weight-reducing groove is a U-shaped groove.

[0015] By applying the technical solution of the present invention, the disc cap is fixedly connected to the wheel hub, and the friction ring and the disc cap can be fixedly connected through the first connecting member and the second connecting member. When the first connecting member and the second connecting member are connected, the first connecting member and the second connecting member abut against each other through the abutting portion, and a certain gap is formed between the spacer and the first connecting member in the axial direction. In this way, intermittent contact in the circumferential direction is formed between the disc cap and the friction ring. After the friction ring and the brake caliper generate heat due to friction, the friction ring expands due to the heat, deforms and warps in the direction of the disc cap, and squeezes the second connecting member, causing the second connecting member to also produce a certain deformation. During the deformation process, the abutting portion always maintains abutment with the first connecting member. The gap formed by the second connecting member and the first connecting member through the spacer can buffer the extrusion from the first connecting member, reduce the internal stress of the brake disc, and thereby reduce the overall deformation of the second connecting member, thereby ensuring the connection effect between the friction ring and the disc cap and optimizing the thermal deformation of the brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 Shows a front view of the brake disc provided by the utility model;

[0018] Figure 2 Shown Figure 1 Cross-sectional view of the brake disc in the MM direction;

[0019] Figure 3 Shown Figure 2 A partial enlarged view of point A in the middle;

[0020] Figure 4 It shows a schematic structural diagram of the cooperation between the abutting portion and the first connecting block provided by the present invention;

[0021] Figure 5 It shows a schematic structural diagram of the first connecting hole and the second connecting hole provided by the utility model;

[0022] Figure 6 Shown Figure 1 A partial enlarged view of point B in the middle.

[0023] The above drawings include the following reference numerals:

[0024] 100, friction ring;

[0025] 110, first connecting block; 111, first connecting hole; 120, first weight-reducing groove;

[0026] 200, pan hat;

[0027] 201, spacer portion; 202, abutment portion;

[0028] 210, second connecting block; 211, second connecting hole; 212, countersunk hole; 220, second weight-reducing groove;

[0029] 300. Fasteners. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 As shown, an embodiment of the present invention provides a brake disc, comprising a friction ring 100 and a disc cap 200. The inner ring of the friction ring 100 has a first connecting member arranged in an annular manner, and the outer ring of the disc cap 200 has a second connecting member arranged in an annular manner. The first connecting member and the second connecting member are fixedly connected in the axial direction of the brake disc. The second connecting member has a plurality of spacers 201 and a plurality of abutting portions 202. The spacers 201 and the abutting portions 202 are arranged in an annular manner along the circumference of the disc cap 200 at intervals. The abutting portions 202 abut against the first connecting member. The spacers 201 are located on the side of the second connecting member facing the first connecting member. The first connecting member is spaced apart in the axial direction of the brake disc by the spacers 201 and the second connecting member. The second connecting member can be deformed by the spacers 201.

[0032] By applying the technical solution of the present invention, the disc cap 200 is fixedly connected to the wheel hub, and the friction ring 100 and the disc cap 200 can be fixedly connected by the first connecting member and the second connecting member. When the first connecting member and the second connecting member are connected, the first connecting member and the second connecting member are abutted by the abutting portion 202. Figures 2 to 4 As shown, a certain gap is formed axially between the spacer 201 and the first connecting member. This creates intermittent circumferential contact between the disc cap 200 and the friction ring 100. When friction between the friction ring 100 and the brake caliper generates heat, the friction ring 100 expands due to the heat, deforming and warping toward the disc cap 200. This compresses the second connecting member, causing some deformation. During this deformation process, the abutment portion 202 always maintains contact with the first connecting member. The gap formed by the spacer 201 between the second connecting member and the first connecting member can buffer the compression from the first connecting member, reducing the internal stress of the brake disc and, in turn, the overall deformation of the second connecting member, ensuring a good connection between the friction ring 100 and the disc cap 200 and optimizing thermal deformation of the brake disc. Furthermore, the friction ring 100 slightly oscillates, creating an appropriate angle, forming a relatively smooth friction surface with the brake caliper, thus maintaining braking stability.

[0033] Specifically, in the present application, the second connector includes a second connector block 210. Multiple second connector blocks 210 are provided, and the plurality of second connector blocks 210 are arranged in annular intervals along the circumference of the disk cap 200. The second connector block 210 has a spacer portion 201 and an abutment portion 202, with the abutment portion 202 being provided on either side of the spacer portion 201 along the circumference of the disk cap 200. This arrangement reduces the overlap area between the second connector and the friction ring 100, reduces heat transfer, and further optimizes thermal deformation of the disk cap 200.

[0034] Furthermore, the spacer 201 is fixedly connected to the first connector via a fastener 300, which is used to provide a preload force in the opposite directions between the first connector and the second connector block 210. This arrangement allows for a certain degree of elastic deformation during assembly of the spacer 201 of the disc cap 200, generating a preload force. During braking, the disc cap 200 is permanently deformed due to the compression of the friction ring 100. After the brakes are released, the preload force ensures a tight fit between the disc cap 200 and the friction ring 100, preventing separation and ensuring a secure connection between the two.

[0035] In a specific embodiment of the present application, a spacing groove is provided on the second connecting block 210. The spacing groove extends radially through the second connecting block 210 in the disc cap 200, forming a spacing portion 201. The provision of the spacing groove allows for axial floating between the disc cap 200 and the friction ring 100, optimizing thermal deformation. By directly slotting the second connecting block 210 rather than forming a connection through a connector, and thereby allowing for floating, a floating composite structure is achieved, compared to the prior art method of connecting the friction ring and disc cap via rivets, washers, and spring plates. This improves the overall structural performance of the second connecting block 210, reduces the number of connecting accessories, simplifies the production process, reduces costs, achieves floatability, and ensures relatively good thermal deformation.

[0036] In other embodiments of the present application, the spacing groove may also extend along the circumference of the disk cap 200 , and the abutting portions 202 are spaced apart on both sides of the spacing groove along the radial direction.

[0037] Furthermore, the disc cap 200 and friction ring 100 are connected in a floating manner in the radial direction of the brake disc, enabling relative radial movement between them. This arrangement allows for a certain amount of free expansion space between the disc cap 200 and the friction ring 100, thereby eliminating some of the tensile stress within the disc cap 200 and the friction ring 100, thereby reducing deformation of the friction ring 100 caused by heat and ensuring the braking effect of the brake disc.

[0038] refer to Figure 5As shown, the first connecting member is provided with a plurality of first connecting holes 111, and the second connecting block 210 is provided with a second connecting hole 211. The plurality of first connecting holes 111 and the plurality of second connecting holes 211 are arranged in a one-to-one correspondence. The fastener 300 is inserted into the first connecting holes 111 and the second connecting holes 211. The fastener 300 and the first connecting hole 111 have an interference fit, and the diameter of the second connecting hole 211 is larger than the diameter of the first connecting hole 111. With this arrangement, after the fastener 300 passes through the first connecting holes 111 and the second connecting holes 211, a gap still exists between the second connecting hole 211 and the fastener. The friction ring 100 can float radially relative to the disk cap 200 via the fastener, achieving a floating connection and providing space for thermal expansion of the friction ring 100 and the fastener 300.

[0039] Furthermore, a countersunk hole 212 is provided at the end of the second connecting hole 211 facing away from the first connecting member. The fastener 300 includes a rivet, and the countersunk hole 212 is used to accommodate the rivet's head. This arrangement reduces the axial space occupied by the fastener 300, preventing the rivet from protruding from the end surface of the disc cap 200, and minimizing the impact of the brake disc on the installation of other structures.

[0040] In other embodiments of the present application, the fastener 300 may also be a structure such as a lock nut.

[0041] Furthermore, the first connector includes a plurality of first connecting blocks 110, which are arranged in an annular pattern along the circumference of the friction ring 100. The plurality of first connecting blocks 110 correspond one-to-one with the plurality of second connecting blocks 210, with a first weight-reducing groove 120 formed between two adjacent first connecting blocks 110. This arrangement reduces the contact area between the friction ring 100 and the disc cap 200, while also reducing the overall weight of the friction ring 100, thereby contributing to a lighter brake disc. The one-to-one correspondence between the plurality of first connecting blocks 110 and the plurality of second connecting blocks 210 also enhances the connection strength between the friction ring 100 and the disc cap 200.

[0042] Reference Figure 1 and Figure 6 As shown, a second weight-reducing groove 220 is formed between two adjacent second connecting blocks 210, and at least a portion of the first weight-reducing groove 120 is interconnected with the second weight-reducing groove 220. This arrangement reduces the weight of the disc cap 200, further reducing the overall weight of the brake disc. The connection between the first weight-reducing groove 120 and the second weight-reducing groove 220 creates an air flow path, facilitating cooling of the brake disc.

[0043] Specifically, the first weight-reducing groove 120 is a U-shaped groove, which can improve the connection between the first connecting block 110 and the friction ring 100, increase the overall structural strength of the friction ring 100, and reduce the risk of the first connecting block 110 breaking.

[0044] Similarly, the second weight-reducing groove 220 may also be a U-shaped groove or a V-shaped groove, etc., to improve the connection strength between the second connecting block 210 and the disk cap 200 .

[0045] Further in the present application, multiple first connecting blocks 110 cooperate with the inner wall of the friction ring 100 to form a mounting groove, and the disc cap 200 is arranged in the mounting groove to limit the relative sliding of the disc cap 200 and the friction ring 100 in the radial direction, thereby facilitating the installation of the friction ring 100 and the disc cap 200.

[0046] Furthermore, when the axis of the friction ring 100 coincides with the axis of the disc cap 200, the radial distance between the mounting groove and the disc cap 200 is greater than the radial distance between the second connecting hole 211 and the fastener 300. This arrangement can prevent the inner wall of the mounting groove from colliding with the disc cap 200, reduce the probability of noise generation, and also provide a certain degree of protection for the disc cap 200.

[0047] Specifically in this application, the material of the disk cap 200 can be ductile iron, aluminum and its alloys or steel, the material of the friction ring 100 can be gray cast iron, steel or aluminum, and the material of the fastener can be copper or stainless steel.

[0048] Compared with the prior art, the solution provided in the present application adopts a structure in which the disc cap 200 and the friction ring 100 are in intermittent circumferential contact, and the first connecting hole 111 and the second connecting hole 211 have different diameters, which can realize a floating connection between the friction ring 100 and the disc cap 200 in the axial and radial directions, providing better thermal deformation capacity for the brake disc; and, through the connection method of the fastener 300, while applying a pre-tightening force to the disc cap 200 and the friction ring 100, it can also reduce the requirements for the connection accessories required for the floating connection in the prior art, simplify the assembly and production process, and further reduce the production cost of the brake disc.

[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0051] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0053] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A brake disc, characterized in that: The brake disc comprises: A friction ring (100), wherein the inner ring of the friction ring (100) has a first connecting member arranged in an annular shape; A disc cap (200), wherein the outer ring of the disc cap (200) is provided with a second connecting member, the first connecting member and the second connecting member are fixedly connected in the axial direction of the brake disc, the second connecting member has a plurality of spacers (201) and a plurality of abutting portions (202), the spacers (201) and the abutting portions (202) are spaced along the circumferential ring of the disc cap (200), the abutting portions (202) abut against the first connecting member, the spacer (201) is located on the side of the second connecting member facing the first connecting member, the first connecting member forms a space in the axial direction of the brake disc between the spacer (201) and the second connecting member, and the second connecting member can be deformed by the spacer (201).

2. The brake disc according to claim 1, characterized in that The second connecting member includes: A second connecting block (210), wherein a plurality of the second connecting blocks (210) are provided, wherein the plurality of the second connecting blocks (210) are arranged in an annular manner along the circumference of the disk cap (200), wherein the second connecting block (210) comprises the spacer portion (201) and the abutment portion (202), and the abutment portion (202) is arranged on both sides of the spacer portion (201) along the circumference of the disk cap (200).

3. The brake disc according to claim 2, characterized in that The spacer (201) and the first connecting member are fixedly connected via a fastener (300), and the fastener (300) is used to provide a pre-tightening force in opposite directions to the first connecting member and the second connecting block (210).

4. The brake disc according to claim 3, characterized in that The disc cap (200) and the friction ring (100) are floatingly connected in the radial direction of the brake disc, and the disc cap (200) and the friction ring (100) can move relative to each other in the radial direction.

5. The brake disc according to claim 4, characterized in that The first connecting member is provided with a plurality of first connecting holes (111), and the second connecting block (210) is provided with a second connecting hole (211). The plurality of first connecting holes (111) and the plurality of second connecting holes (211) are arranged in a one-to-one correspondence. The fastener (300) is passed through the first connecting hole (111) and the second connecting hole (211). The fastener (300) is interference-fitted with the first connecting hole (111), and the diameter of the second connecting hole (211) is larger than the diameter of the first connecting hole (111).

6. The brake disc according to claim 5, characterized in that A countersunk hole (212) is provided at the end of the second connecting hole (211) facing away from the first connecting piece. The fastener (300) includes a rivet, and the countersunk hole (212) is used to accommodate a rivet cap.

7. The brake disc according to claim 2, characterized in that The second connecting block (210) is provided with a spacing groove, the spacing groove passes through the second connecting block (210) along the radial direction of the disk cap (200), and the spacing groove forms the spacing portion (201).

8. The brake disc according to claim 2, wherein: The first connecting member includes a plurality of first connecting blocks (110), the plurality of first connecting blocks (110) are arranged in an annular manner along the circumference of the friction ring (100), the plurality of first connecting blocks (110) and the plurality of second connecting blocks (210) are arranged in a one-to-one correspondence, and a first weight-reducing groove (120) is formed between two adjacent first connecting blocks (110).

9. The brake disc according to claim 8, characterized in that A second weight-reducing groove (220) is formed between two adjacent second connection blocks (210), and at least a portion of the first weight-reducing groove (120) and the second weight-reducing groove (220) are in communication with each other.

10. The brake disc according to claim 8, wherein: The first weight-reducing groove (120) is a U-shaped groove.

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