Brake disc and axle assembly

Abstract

The utility model discloses a brake disc and an axle assembly. The brake disc comprises a disc body and a cylindrical connecting part, the tray body comprises a first tray body, a second tray body and a plurality of connecting ribs; the cross section of each connecting rib is in a rhombus shape, the rhombus comprises a long shaft and a short shaft, and the extension line of the long shaft of the rhombus of each connecting rib intersects with the central axis of the brake disc. The plurality of connecting ribs comprise a circle of inner side connecting ribs arranged around the central axis of the brake disc and a circle of outer side connecting ribs arranged around the central axis of the brake disc, the circle of outer side connecting ribs are located on the periphery of the circle of inner side connecting ribs, and the circle of outer side connecting ribs and the circle of inner side connecting ribs are arranged at intervals; the two adjacent side edges of the periphery of the inner side connecting rib and the side edges of the inner edges of the two outer side connecting ribs located on the two sides of the periphery of the inner side connecting rib form an air guide channel, and the width of the air guide channel is gradually increased in the direction from the center of the brake disc to the periphery of the brake disc.

Description

Technical Field

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

[0002] The braking systems of commercial vehicles include drum brake systems and disc brake systems. Disc brake systems are widely used in the front assembly of current trailers due to their better braking performance. The brake disc is the core component of the disc brake system. The friction generated by the disc and the brake caliper forms the braking force. During the braking process of the vehicle, the brake lining on the caliper contacts the surface of the brake disc and generates a large amount of heat. This heat can instantly increase the temperature of the brake disc. Under high temperature conditions, the braking performance of the brake disc will be greatly reduced. Therefore, a heat dissipation structure is usually provided on the existing brake disc to dissipate the heat generated during braking to the external environment as quickly as possible when the brake disc rotates with the wheel. However, the heat dissipation effect of the existing brake disc is poor and it is difficult to meet the increasingly high safety requirements of commercial vehicles. Utility Model Content

[0003] In view of the shortcomings of the prior art, the first object of the present invention is to provide a brake disc that can quickly dissipate the heat generated by itself while the vehicle is driving, thereby improving the braking safety of the vehicle.

[0004] The second purpose of the present utility model is to provide an axle assembly.

[0005] In order to achieve the above purpose one, the utility model adopts the following technical solutions:

[0006] A brake disc, comprising a disc body and a cylindrical connecting portion;

[0007] A connecting flange is provided at one end of the cylindrical connecting portion. The disc body includes a first disc body and a second disc body spaced a certain distance from the first disc body and connected to the other end of the cylindrical connecting portion. A heat dissipation gap is formed between the first disc body and the second disc body. A plurality of connecting ribs are provided in the heat dissipation gap to connect the first disc body and the second disc body together. Each connecting rib has a rhombus-shaped cross-section, the rhombus including a major axis and a minor axis. The extension of the major axis of each connecting rib intersects the central axis of the brake disc.

[0008] The multiple connecting ribs include a circle of inner connecting ribs arranged around the central axis of the brake disc, and a circle of outer connecting ribs arranged around the central axis of the brake disc. The circle of outer connecting ribs is located at the periphery of the circle of inner connecting ribs and is spaced apart from the circle of inner connecting ribs, so that an outer connecting rib is arranged on both sides of the periphery of any inner connecting rib, and the two adjacent side edges of the periphery of the inner connecting rib respectively form an air guide channel with the inner edge sides of the two outer connecting ribs located on both sides of its periphery. The width of the air guide channel gradually increases in the direction from the center to the periphery of the brake disc.

[0009] The major axis and the minor axis of the rhombus of the inner connecting rib are both smaller than the major axis and the minor axis of the rhombus of the outer connecting rib.

[0010] The minor axis of the rhombus of the inner connecting rib is b1 and the major axis is a1, and the minor axis of the rhombus of the outer connecting rib is b2 and the major axis is a2, wherein b1 / a1>b2 / a2.

[0011] b1 / a1 is 0.52~0.59; b2 / a2 is 0.50~0.56.

[0012] The major axis and the minor axis of the inner connecting rib rhombus are respectively equal to the major axis and the minor axis of the outer connecting rib rhombus.

[0013] The multiple connecting ribs include two circles of inner connecting ribs arranged around the central axis of the brake disc, and two circles of outer connecting ribs arranged around the central axis of the brake disc, respectively. The two circles of outer connecting ribs are respectively located outside the two circles of inner connecting ribs.

[0014] The second disk body and the cylindrical connecting portion are integrally formed;

[0015] Or the inner edge of the second disk body is fixedly connected to the other end of the cylindrical connecting part through bolts.

[0016] In order to achieve the above-mentioned second purpose, the present invention adopts the following technical solutions:

[0017] The axle assembly includes the above-mentioned brake disc.

[0018] The beneficial effects of the present invention are:

[0019] In the present invention, by configuring the connecting ribs as inner connecting ribs and outer connecting ribs arranged around the axis of the brake disc, an air guide channel with a width gradually increasing from the inside to the outside is formed between the inner connecting rib and the outer connecting ribs on both sides thereof. In the process of the brake disc rotating with the wheel, due to the action of centrifugal force, air flows from the inside to the outside along the heat dissipation gap. Under the action of centrifugal force, an instantaneous negative pressure can be formed at the position with a larger width at the outer end of the air guide channel, so that the air can quickly flow outward through the air guide channel. That is, when the brake disc rotates at a high speed with the wheel, the air guide channel with a gradually changing width can accelerate the speed of air flowing from the inside to the outside, thereby accelerating the heat exchange rate between the air and the brake disc. The heat generated by the brake disc during braking can be quickly dissipated to the external environment, thereby improving the driving safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the brake disc of the utility model;

[0021] Figure 2 This is a cross-sectional view of the brake disc of the utility model;

[0022] Figure 3 for Figure 2 Magnified view at point A in the middle. DETAILED DESCRIPTION

[0023] Below, in conjunction with the accompanying drawings and specific embodiments, the utility model is further described:

[0024] like Figure 1 、 23, a brake disc of the present invention comprises a disc body 10 and a cylindrical connecting portion 20, one end of the cylindrical connecting portion 20 is provided with a connecting flange 21, the connecting flange 21 is used to connect with the rim of the wheel end of the axle assembly, the disc body 10 comprises a first disc body 11 and a second disc body 12, the first disc body 11 and the second disc body 12 are arranged at a certain distance along the axial direction of the brake disc (the central axis O in the figure) to form a heat dissipation gap between the first disc body 11 and the second disc body 12, the second disc body 12 is connected to the other end of the cylindrical connecting portion 20 to connect the disc body 1 0 is connected to the cylindrical connecting portion 20, and a plurality of connecting ribs are provided in the heat dissipation gap between the first disc body 11 and the second disc body 12. The plurality of connecting ribs connect the first disc body 11 and the second disc body 12 together. The cross section of each connecting rib (i.e., the surface perpendicular to the central axis O) is rhombus-shaped. The rhombus includes a major axis and a minor axis. The major axis of the rhombus is the line connecting the two diagonals with a larger spacing, and the minor axis of the rhombus is the line connecting the other diagonals with a smaller spacing. The extension line of the major axis of the rhombus of each connecting rib intersects the central axis O of the brake disc. The multiple connecting ribs mentioned above include a circle of connecting ribs 13 arranged around the central axis O of the brake disc, and a circle of connecting ribs 14 arranged around the central axis O of the brake disc. The circle of connecting ribs 14 is located on the periphery of the circle of connecting ribs 13, and the circle of connecting ribs 14 and the circle of connecting ribs 13 are staggered in the circumferential direction of the brake disc, that is, the connecting ribs 13 and the connecting ribs 14 are arranged at intervals, so that a connecting rib 14 is arranged on both sides of the periphery of any connecting rib 13, and two adjacent side edges 131 of the periphery of the connecting rib 13 are placed between the two adjacent connecting ribs 14. An air guide channel 17 is formed between the two adjacent side edges 141 of the inner edges of the two connecting ribs 14 and the two side edges 131 on the connecting rib 13 respectively. In the direction from the center to the periphery of the brake disc, the width of the air guide channel 17 gradually increases, so that the air guide channel 17 forms a structure with a larger outside and a smaller inside.

[0025] In the present invention, the disc body 10 of the brake disc is composed of a first disc body 11 and a second disc body 12. A plurality of connecting ribs are provided between the first disc body 11 and the second disc body 12. By configuring the connecting ribs as inner connecting ribs 13 and outer connecting ribs 14 arranged around the axis of the brake disc, an air guide channel 17 with a gradually increasing width from the inside to the outside is formed between the connecting rib 13 and the connecting ribs 14 on both sides thereof. When the brake disc rotates with the wheel, due to the action of centrifugal force, air flows from the inside to the outside along the heat dissipation gap. Under the action of centrifugal force, a momentary negative pressure can be formed at the position with a larger width at the outer end of the air guide channel 17, thereby allowing air to flow outward quickly through the air guide channel 17. That is, when the brake disc rotates at high speed with the wheel, the air guide channel 17 with a gradually changing width can accelerate the speed of air flowing from the inside to the outside, thereby accelerating the heat exchange rate between the air and the brake disc. The heat generated by the brake disc during braking can be quickly dissipated to the external environment, thereby improving the driving safety of the vehicle.

[0026] In a preferred embodiment, the long axis a1 of the rhombus of the connecting rib 13 located on the inner side is smaller than the long axis a2 of the rhombus of the connecting rib 14, and the short axis b1 of the rhombus of the connecting rib 13 is smaller than the short axis b2 of the rhombus of the connecting rib 14, that is, the overall size of the connecting rib 13 is smaller than the overall size of the connecting rib 14. Furthermore, the above-mentioned b1 / a1 is greater than b2 / a2, that is, the width-to-length ratio of the connecting rib 13 is greater than the width-to-length ratio of the connecting rib 14, the width-to-length ratio b1 / a1 of the connecting rib 13 is 0.52~0.59, and the width-to-length ratio b2 / a2 of the connecting rib 14 is 0.50~0.56. In this way, it is more conducive to forming an air guide channel 17 that is narrow inside and wide outside between the side 131 of the connecting rib 13 located on the inner side and the side 141 of the connecting rib 14 located on the outer side.

[0027] In other embodiments, the long axis of the inner connecting rib is equal to the long axis of the outer connecting rib, and the short axis of the inner connecting rib is equal to the short axis of the outer connecting rib, that is, the inner connecting rib has the same shape and size as the outer connecting rib; see Figure 2 、 3 As shown, a connecting rib 15 arranged around the central axis O is further provided on the periphery of the above-mentioned connecting rib 14. The connecting rib 15 is located on the periphery of the connecting rib 14. The connecting rib 14 can be regarded as a connecting rib located on the inner side, and the connecting rib 15 can be regarded as a connecting rib located on the outer side. An air guide channel 18 is formed between the two adjacent side walls 142 on the periphery of the connecting rib 14 and the side walls 151 on the inner edges of the connecting rib 15 on both sides thereof. The width of the air guide channel 18 gradually increases from the inside to the outside, and the air guide channel 18 is connected to the air guide channel 17.

[0028] Alternatively, a circle of connecting ribs 16 arranged around the central axis O may be provided on the periphery of the connecting ribs 15. That is, four circles of connecting ribs are arranged between the first plate 11 and the second plate 12. An air guide channel 19 is formed between the inner side edges 161 of the connecting ribs 16 and the outer side edges of the connecting ribs 15. The width of the air guide channel 19 gradually increases from the inside to the outside, and the air guide channel 19 is connected to the air guide channel 18. In other embodiments, the multiple connecting ribs may be arranged in five or more circles around the central axis O, or may be arranged in only two circles around the central axis.

[0029] The second disc body 12 and the cylindrical connecting portion 20 are integrally formed, i.e., the brake disc is integrally formed using a casting process or other processing techniques. Alternatively, the disc body 10 and the cylindrical connecting portion 20 may be formed separately, and then the other end of the cylindrical connecting portion 20 is fixedly connected to the inner edge of the second disc body 12 via bolts. In this way, the cylindrical connecting portion 20 can be made of a material with good strength and light weight, and the disc body 20 can also be made of a material with good friction performance.

[0030] The axle assembly of the present invention includes the above-mentioned brake disc. Other structures of the axle assembly are the same as those in the prior art and will not be described in detail here.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A brake disc, characterized in that It includes a disc body and a cylindrical connecting portion; A connecting flange is provided at one end of the cylindrical connecting portion. The disc body includes a first disc body and a second disc body spaced a certain distance from the first disc body and connected to the other end of the cylindrical connecting portion. A heat dissipation gap is formed between the first disc body and the second disc body. A plurality of connecting ribs are provided in the heat dissipation gap to connect the first disc body and the second disc body together. Each connecting rib has a rhombus-shaped cross-section, the rhombus including a major axis and a minor axis. The extension of the major axis of each connecting rib intersects the central axis of the brake disc. The multiple connecting ribs include a circle of inner connecting ribs arranged around the central axis of the brake disc, and a circle of outer connecting ribs arranged around the central axis of the brake disc. The circle of outer connecting ribs is located at the periphery of the circle of inner connecting ribs and is spaced apart from the circle of inner connecting ribs, so that an outer connecting rib is arranged on both sides of the periphery of any inner connecting rib, and the two adjacent side edges of the periphery of the inner connecting rib respectively form an air guide channel with the inner edge sides of the two outer connecting ribs located on both sides of its periphery. The width of the air guide channel gradually increases in the direction from the center to the periphery of the brake disc.

2. The brake disc according to claim 1, wherein The major axis and the minor axis of the rhombus of the inner connecting rib are both smaller than the major axis and the minor axis of the rhombus of the outer connecting rib.

3. The brake disc according to claim 2, characterized in that The minor axis of the rhombus of the inner connecting rib is b1 and the major axis is a1, and the minor axis of the rhombus of the outer connecting rib is b2 and the major axis is a2, wherein b1 / a1>b2 / a2.

4. The brake disc according to claim 3, wherein b1 / a1 is 0.52~0.59; b2 / a2 is 0.50~0.

56.

5. The brake disc according to claim 1, wherein The major axis and the minor axis of the inner connecting rib rhombus are respectively equal to the major axis and the minor axis of the outer connecting rib rhombus.

6. The brake disc according to claim 1, wherein The multiple connecting ribs include two circles of inner connecting ribs arranged around the central axis of the brake disc, and two circles of outer connecting ribs arranged around the central axis of the brake disc, respectively. The two circles of outer connecting ribs are respectively located outside the two circles of inner connecting ribs.

7. The brake disc according to claim 1, wherein The second disk body and the cylindrical connecting portion are integrally formed; Or the inner edge of the second disk body is fixedly connected to the other end of the cylindrical connecting part through bolts.

8. Axle assembly, characterized in that: A brake disc comprising the brake disc according to any one of claims 1 to 7.

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