TWI625266B - Bicycle brake disc - Google Patents

Abstract

The bicycle brake disc of the present invention comprises: a disc body, a claw piece, a plurality of heat sinks and a plurality of first connecting pieces. The disc body has an inner space and extends from the inner circumference of the disc body to the inner space to have a plurality of connecting portions. The connecting portion is provided with a connecting hole; the claw piece has a central hole and a plurality of claw arms extending from the central hole toward the outer periphery of the claw piece, the claw arm is provided with a through hole; the heat sink has a first end portion and a second portion An end portion and a plurality of mounting holes; the first end portion and the second end portion of the heat sink are respectively sandwiched between the two adjacent connecting portions and the two adjacent claw arms, so that the connecting hole, the mounting hole and the through hole Arranging sequentially, the disk body, the heat sink and the claw piece are pierced by the first connecting member for fixing. With this structure, when braking or decelerating, the frictional heating of the brake caliper and the disk body is prevented, the disk body is deformed and the liquid boiling in the hydraulic oil pipe is reduced, and the risk of foreign matter being caught is prevented.

Description

Bicycle brake disc

The present invention relates to a bicycle wheel for a bicycle, and more particularly to a bicycle brake disk having a heat sink and having a heat transfer coefficient greater than that of the disk body, which can quickly dissipate heat and prevent foreign matter from entering.

Please refer to FIG. 1 and FIG. 2 for a conventional bicycle disc brake disc. The steel is integrally formed into a circular disc. The center of the brake disc 1 is provided with a set of holes 2 for the flower hub 5 of the bicycle. The outer circumference of the sleeve hole 2 is annularly arranged with a plurality of circular connection holes 3, and the connection hole 3 is screwed into the hub 5 by a screw 4, and the brake disk 1 is adjacent to the plurality of holes A plurality of first holes 6 are arranged in the first hole 6 and a plurality of second holes 8 are annularly arranged adjacent to the outer circumference of the brake disk 1. The first hole 6 and the second hole 7 are annularly arranged with a plurality of third holes 8 therebetween. The first hole 6, the second hole 7 and the third hole 8 can cause the brake disc 1 to achieve a heat dissipation function when braking.

Since the wheel of the bicycle travels on the road surface, the rider manually adjusts a brake device 110 of the bicycle handle 100 during deceleration and braking, and the brake device 110 pulls a hydraulic oil pipe 120 to control a brake mounted on the bicycle front fork 130. The caliper 140 selectively clamps the brake disc 1 to stop the rotation or deceleration of the brake disc 1.

It can be seen that when the brake disc 1 is subjected to the frictional friction of the brake caliper 140, high heat is generated. It is known that the brake disc 1 has no heat sink to provide cooling, and the connection hole 3 of the brake disc 1 is easy to be The high temperature deformation, but not stably screwed on the flower hub 5 of the bicycle, may also cause the liquid in the hydraulic oil pipe 120 to boil due to poor heat dissipation, thereby reducing the service life of the hydraulic oil pipe 120. Moreover, if the third hole 8 of the brake disc 1 encounters a foreign object such as a finger, or suddenly a hard foreign object such as a tree branch is stuck in the driving, it will cause an instantaneous braking and stop, which may cause the risk of overturning the vehicle. Therefore, in order to protect the safety of the user, the general solution in the industry is to add a protective cover on the outside of the brake disc 1. However, the addition of the protective cover also increases the manufacturing assembly cost and weight.

The main object of the present invention is to provide a bicycle brake disc having a heat dissipation function, which can effectively prevent the brake caliper and the disc body from being frictionally heated, so that the deformation of the disc body is not stable, and the liquid in the hydraulic oil pipe is boiled and the brake failure occurs.

Another object of the present invention is to prevent sudden entry of foreign matter into the hole of the brake disc during driving, thereby avoiding the risk of overturning of the vehicle and the penetration of the finger.

In order to achieve the above objective, the present invention discloses a bicycle brake disc comprising: a disc body having an inner space and a plurality of first holes, the inner circumference of the disc body extending toward the center of the disc body; a plurality of connecting portions, wherein the connecting portion is provided with a connecting hole; a claw piece is provided with a central hole, and the central hole extends toward the outer periphery of the claw piece to form a plurality of claw arms, the claw arm is provided with a perforation; a plurality of heat sinks, Each of the plurality of first holes and the at least one mounting hole; the plurality of first connecting members respectively comprise a head and a rod; wherein the first connecting member passes through the connecting hole, the mounting hole and the through hole For connecting the disk body, the heat sink and the claw piece.

The claw arm further includes a distal end portion and a retaining edge, the distal end portion is disposed at one end of the claw arm away from the central hole, the through hole is disposed at the distal end portion, and the retaining edge is disposed in the claw piece A limiting groove is disposed between the peripheral edge and the distal end portion between the adjacent claw arms and adjacent to the central opening.

The heat sink further includes a first end portion and a second end portion, the first end portion and the second end portion are configured to cooperate with the claw edge of the claw arm, and the assembly hole is disposed at the first end The end portion and the second end portion sandwich the heat sink with the first end portion and the second end portion between the disk body and the claw piece.

The heat sink further includes a base portion disposed between the first end portion and the second end portion, and combined with the limiting slot of the claw piece to be sandwiched between a bicycle hub and the bicycle Between the claws.

Wherein, the surface of the rod body of the first connecting member is provided with a heat dissipation layer.

Wherein, the heat dissipation layer material on the surface of the rod body is selected from one of a composite material containing a metal component, liquid ceramics and graphene.

Wherein, the material of the disc body is selected from one of stainless steel, cast iron, aluminum alloy, carbon fiber composite material, ceramic material and a combination thereof.

Wherein, a surface of the heat sink is provided with a heat dissipation layer.

The heat dissipation layer material on the surface of the heat sink is selected from one of a composite material containing a metal component, a liquid ceramic, and graphene.

Wherein, the constituent material of the heat sink is greater than the material of the disk body.

Thereby, the rider regulates the brake device of the bicycle, pulls the hydraulic oil pipe to control the brake caliper to clamp the disk body, and decelerates or stops the rotation of the disk body, and the disk body is heated by the friction of the brake caliper. And transmitting the heat sink through the first connecting member, wherein the surface of the rod body of the first connecting member has a heat dissipation layer, and a heat transfer coefficient of the heat sink sheet material is larger than the heat sink The disk body material or the heat dissipating layer disposed on the surface of the heat sink to achieve a rapid heat dissipation and cooling effect, the heat sink and the plurality of second holes can enhance the heat dissipation and cooling, thereby effectively preventing the liquid in the hydraulic oil pipe from being caused by the high temperature of the disk body Boiling, and reducing the service life of the hydraulic oil pipe, can prevent the disk body from being deformed by the high temperature due to high temperature, and cannot be firmly attached to the flower hub.

Moreover, the heat sink of the present invention is installed in the assembly space, so that the assembly space forms a gap that does not allow foreign matter or the fingers of the human body to protrude. Therefore, the present invention completely prevents foreign matter from entering the wheel of the bicycle for instantaneous braking, thereby avoiding The danger of overturning or extending the fingers can also eliminate the need to install the protective cover, thus saving manufacturing and installation costs and weight.

(known)

1‧‧‧煞车盘

2‧‧‧Close hole

3‧‧‧Contact hole

4‧‧‧ screws

5‧‧‧Flower hub

6‧‧‧ first hole

7‧‧‧ second hole

8‧‧‧ third hole

100‧‧‧ bicycle handlebars

110‧‧‧煞车器

120‧‧‧Hydraulic tubing

130‧‧‧ bicycle front fork

140‧‧‧ brake calipers

(this invention)

100‧‧‧Flower hub

200‧‧‧ bicycle front fork

210‧‧‧Bicycle handle

300‧‧‧煞车器

310‧‧‧ brake calipers

320‧‧‧Hydraulic tubing

10‧‧‧Disc body

11‧‧‧Internal space

12‧‧‧Connecting Department

121‧‧‧connection hole

13‧‧‧First recess

14‧‧‧ first hole

20‧‧‧ claws

21‧‧‧ center hole

22‧‧‧ claw arm

221‧‧‧End

222‧‧‧Second recess

223‧‧ ‧ rim

224‧‧‧Perforation

24‧‧‧Limited slot

25‧‧‧ matching holes

26‧‧‧Second connector

27‧‧‧Set space

30‧‧‧ Heat sink

31‧‧‧ first end

32‧‧‧second end

33‧‧‧ base

34‧‧‧Assembly holes

35‧‧‧ second hole

40‧‧‧First connector

41‧‧‧ rod body

42‧‧‧ head

43‧‧‧heat layer

1 is a conventional bicycle disc brake disc.

2 is a schematic view of a conventional bicycle disc brake disc in combination with a bicycle brake device.

3A is a schematic view of a bicycle brake device according to an embodiment of the present invention.

Fig. 3B is a partial enlarged view of Fig. 3A.

Figure 4 is an exploded perspective view of an embodiment of the present invention.

Figure 5 is a combined perspective view of an embodiment of the present invention.

Figure 6A is a left side view of a combination of embodiments of the present invention.

Figure 6B is a cross-sectional view of the A-A cut line of Figure 6A.

Fig. 6C is an enlarged view of Fig. 6B.

Figure 7 is a right side view of a combination of embodiments of the present invention.

With regard to the details and technical description of the present invention, further embodiments are now It is to be understood that the embodiments are merely illustrative and are not to be construed as limiting.

Referring to FIGS. 3A and 3B, the present invention discloses a bicycle brake disc that is mounted between a bicycle hub 100 and a bicycle front fork 200, and is clamped by a brake caliper 310 mounted on the bicycle front fork 200. The bicycle wheel is decelerated or the brake is stopped, and the brake caliper 310 is coupled to a brake device 300 on the bicycle handle 210 by a hydraulic oil pipe 320.

Referring to FIG. 4 to FIG. 7 , the present invention includes a disc body 10 , a claw piece 20 , a plurality of fins 30 , and a plurality of first connecting members 40 . The disc body 10 is selected from the group consisting of stainless steel, cast iron, and aluminum alloy. One of carbon fiber composite materials and ceramic materials and combinations thereof.

The disk body 10 has an inner space 11 , a plurality of connecting portions 12 , and a plurality of first holes 14 . The connecting portion 12 extends from the inner periphery of the disk body 10 toward the inner space 11 , and each of the connecting portions 12 is provided with a connection. A first recess 13 is formed in the hole 121 between the two adjacent connecting portions 12 and on the inner circumference of the disk body 10. The first holes 14 are annularly disposed on the disk body 10.

The claw piece 20 has a central hole 21 and a plurality of claw arms 22. The claw piece 20 is engaged with the bicycle hub 100 by a central hole 21, and the claw arm 22 extends from the central hole 21 to form an outer periphery of the claw piece 20. A second recess 222 is formed between the adjacent two claw arms 22, and the second recess 222 cooperates with the first recess 13 of the disc body 10 to form a set of matching spaces 27.

As shown in FIG. 3A, FIG. 3A, FIG. 5, FIG. 6A and FIG. 7 , a position of the second recess 222 and a surface facing the hub 100 are provided with a limiting groove 24 , and the inner circumference of the claw piece 20 is adjacent to the central hole. The plurality of array holes 25 are arranged in a ring shape at 21, and the assembly holes 25 are respectively pierced by a second connecting member 26 (a bolt in this embodiment) and screwed with the flower hub 100.

The claw arm 22 extends from the central hole 21 to form an outer periphery of the claw piece 20, and the claw arm 22 One end portion 221 away from the center hole 21 has a thickness 214 which is smaller than the thickness of the other end of the claw arm 22 near the center hole 22 and has a thickness difference, and a rim 223 is formed at the thickness difference, and the end portion is formed. The 221 is provided with a perforation 224. The configuration of the rim 223 cooperates with the connecting portion 12 of the disk body 10.

The heat sink 30 is disposed in a set of matching spaces 27 between the second concave portion 222 of the claw piece 20 and the first concave portion 13 of the disk body 10. The heat sink 30 is made of a material having a thermal conductivity greater than that of the disk body 10. Or a heat dissipating layer is disposed on the surface of the heat sink 30. In this embodiment, the heat dissipating layer is disposed on the surface of the heat sink 30 by coating; in addition, the heat sink 30 may have a heat transfer coefficient greater than that of the dish. The disk body 10 is made of a material, and a heat dissipation layer is disposed on the surface thereof, and the heat dissipation layer is disposed on the surface of the heat sink 30 by coating. The heat dissipation layer on the surface of the heat sink 30 may be selected from one of a composite material containing a metal component, a liquid ceramic, and graphene.

The heat sinks 30 have a first end portion 31, a second end portion 32 and a plurality of second holes 35. The first end portion 31 and the second end portion 32 are respectively provided with a mounting hole 34. The second holes 35 are provided. The distribution is arranged between the two mounting holes 34, and a base portion 33 is disposed between the first end portion 31 and the second end portion 32 to extend toward the inner periphery. The configuration of the base portion 33 cooperates with the assembly hole 25 of the claw piece 20. . The heat sink 30 is engaged with the attachment hole 121 of the disk body 10 by the fitting holes 34 of the first end portion 31 and the second end portion 32.

The first connecting member 40 includes a cylindrical body 41 and a head 42 at one end of the rod 41. The surface of the rod 41 is covered with a heat dissipating layer 43. In this embodiment, the first connecting member 40 is a rivet. The first connecting member 40 passes through the connecting hole 121 of the disk body 10, the mounting hole 34 of the heat sink 30, and the through hole 224 of the claw piece 20, and is riveted to make the disk body 10, the heat sink 30 and the claw The sheet 20 is fixed.

Referring to FIG. 3A and FIG. 4 to FIG. 7, the disk body 10 of the embodiment includes six links. The joint portion 12, the claw piece 20 includes six claw arms 22, and three fins 30. When assembled, each of the fins 30 is engaged with the limiting groove 24 of the claw piece 20 by the base portion 33, and the first end portion 31 and the second end portion 32 are respectively sandwiched between the adjacent two connecting portions 12 and adjacent to each other. The two end portions are 221. Then, the first connecting member 40 passes through the connecting hole 121 of the disk body 10, the mounting hole 34 of the heat sink 30, and the through hole 224 of the claw piece 20, and is riveted, so that the disk body 10, the heat sink 30 and the claw piece 20 are fixed. The heat sinks 30 are assembled in the assembly space 27. The claw piece 20 is screwed to the flower hub 100 through the second connecting member 26 through the assembly hole 25.

Thereby, when the bicycle travels the hub 100 to rotate, the wheel is rotated, and the claw 20 rotates with the hub 100, and the disk body 10 and the heat sinks 30 rotate simultaneously. When the vehicle is decelerating or braking, the rider pulls the brake device. 300 causes the flow of liquid in the hydraulic oil pipe 320 to control the brake caliper 310 to clamp the disk body 10, causing the disk body 10 to slow down or stop rotating. When the disk body 10 is subjected to the friction of the brake caliper 300, heat is generated and transmitted. The first connecting member 40 is transmitted to the heat sink 30, and the heat radiating layer 43 on the surface of the rod body 41 of the first connecting member 40 of the present invention and the heat sink 30 made of the material of the disk body 10 are used for heat dissipation. The disk body 10 achieves a rapid heat dissipation and cooling effect, and in addition to the first hole 14 of the disk body 10, the second hole 35 of the heat sink 30 is included, so that the airflow can pass quickly and the speed of the disk body 10 is lowered. The disk body 10 is effectively prevented from boiling due to the high temperature causing the liquid in the hydraulic oil pipe 320 to boil, and the disk body 10 is prevented from being deformed and fixed on the flower hub 100 due to deformation of the assembly hole 25 due to high temperature.

In addition to the heat dissipation function described above, the heat sink 30 is disposed on the assembly space 27 formed by the first concave portion 13 of the disk body 10 and the second concave portion 222 of the claw piece 20, and is configured to cooperate with each other. The matching space 27 forms a gap that does not allow foreign matter or the fingers of the human body to protrude. Therefore, the present invention can completely prevent the foreign matter from entering the wheel of the instantaneous braking bicycle, avoiding the danger of the person turning over or the finger sticking in, and eliminating the protection. The installation of the cover can save manufacturing and installation This and the weight.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are all It is still within the scope of the invention patent.

Claims (10)

A bicycle brake disc includes: a disc body having an inner space and a plurality of first holes, and a plurality of connecting portions are formed by extending from an inner circumference of the disc body toward a center of the disc body, wherein the connecting portion is provided a connecting hole; a claw piece having a central hole, the central hole extending toward the outer periphery of the claw piece to form a plurality of claw arms, the claw arm having a distal end portion and a retaining edge, the distal end portion being disposed away from the One end of the central hole, the retaining edge is disposed between the inner circumference of the claw piece and the end portion, the end portion is provided with a perforation; the plurality of heat sinks are respectively provided with a plurality of second holes and two assembly holes; the plurality of first connections The first connecting member passes through the connecting hole, the mounting hole and the through hole for connecting the disk body, the heat sink and the claw piece. The bicycle brake disc of claim 1, wherein the thickness of the end portion is smaller than a thickness of the other end of the claw arm near the center hole, and the retaining edge is formed at the thickness difference. And the configuration cooperates with the connecting portion. The bicycle brake disc of claim 1, wherein the heat sink further comprises a first end portion and a second end portion, the configuration of the first end portion and the second end portion a locking edge of the claw arm, the mounting hole is disposed at the first end portion and the second end portion, the heat sink is sandwiched between the first end portion and the second end portion on the disc body and the claw Between the pieces. The bicycle brake disc of claim 3, wherein the claw piece is disposed between the adjacent ones of the claw arms and adjacent to the center hole, and the heat sink further comprises a base. The base portion is disposed between the first end portion and the second end portion and combined with the limiting groove of the claw piece to be sandwiched between a flower hub of the bicycle and the claw piece. The bicycle brake disc of claim 1, wherein a surface of the rod body is provided with a heat dissipation layer. The bicycle brake disc according to claim 5, wherein the heat dissipation layer material on the surface of the rod body is one selected from the group consisting of a composite material containing a metal component, liquid ceramics, and graphene. The bicycle brake disc of claim 1, wherein the material of the disc body is selected from the group consisting of stainless steel, cast iron, aluminum alloy, carbon fiber composite material, ceramic material, and combinations thereof. The bicycle brake disc of claim 1, wherein a surface of the heat sink is provided with a heat dissipation layer. The bicycle brake disc of claim 8, wherein the heat dissipation layer is selected from the group consisting of a composite material containing a metal component, a liquid ceramic, and graphene. The bicycle brake disc of claim 1, wherein the heat sink has a heat transfer coefficient greater than a material of the disc body.