TW202348910A - Brake disk assembly - Google Patents

Abstract

A brake disk assembly is configured to be mounted on a bicycle wheel hub. The brake disk assembly includes an inner disk, an outer disk, and a sensing ring. The inner disk includes a mount portion, and the mount portion has a plurality of inner engagement teeth. The inner engagement teeth of the mount portion are configured to be respectively engaged with outer engagement teeth of the bicycle wheel hub, such that the inner disk is not rotatable relative to the bicycle wheel hub. The outer disk is connected to the inner disk and has a brake surface. The sensing ring is connected to the inner disk and located between the inner engagement teeth of the mount portion and the brake surface of the outer disk.

Description

Brake disc assembly

The present invention relates to a brake disc assembly, in particular to a bicycle brake disc assembly.

As the safety requirements for riding bicycles gradually increase, bicycle manufacturers currently hope to apply anti-lock braking systems (hereinafter referred to as ABS systems) to bicycles to avoid wheel slippage when bicycles brake.

Whether the ABS system operates or not during braking is based on wheel speed changes during braking, so the accuracy of wheel speed measurement will affect the timing of ABS system operation. There are already methods on the market that use optical sensors and porous turntables to measure wheel speed, and the accuracy of such wheel speed measurement meets the requirements. However, as for the existing bicycle structure, there is no structure for installing the porous turntable and the light sensor, which makes it difficult to integrate the porous turntable and the light sensor on the bicycle, which is not conducive to the application of the ABS system.

The present invention provides a brake disc assembly on which a sensing ring is integrated to achieve precise measurement of wheel speed, thereby facilitating the application of the ABS system.

One embodiment of the present invention discloses a brake disc assembly for being installed on a bicycle wheel hub. The brake disc assembly includes an inner disc, an outer disc and a sensing ring. The inner disc contains a hub mounting portion. The hub mounting portion has a plurality of internal spline teeth, and the internal spline teeth of the hub mounting portion are respectively used to mesh with a plurality of external spline teeth of the bicycle hub, so that the inner disc cannot rotate relative to the bicycle hub. The outer disc is connected to the inner disc and has a braking surface. The sensing ring is connected to the inner disc and is located between the inner spline teeth of the hub mounting portion and the braking surface of the outer disc.

Another embodiment of the present invention discloses a brake disc assembly for mounting on a bicycle wheel hub. The brake disc assembly includes an inner disc, an outer disc and a sensing ring. The inner disc includes a hub mounting portion and a connecting portion. The hub mounting portion is used to fix the bicycle hub so that the inner disc cannot rotate relative to the bicycle hub. The connecting portion is connected to the hub mounting portion. The outer disc has a disc mounting portion and a braking surface. The first fastener connects the connecting portion of the inner disc and the disc mounting portion of the outer disc to each other. The sensing ring has a sensing ring mounting part and an annular sensing part. The sensing ring mounting portion of the sensing ring is connected to the connecting portion of the inner dish. When viewed in the axial direction of the sensing ring, the annular sensing portion is located between the braking surface of the outer disc and the connecting portion of the inner disc.

Yet another embodiment of the present invention discloses a brake disc assembly for mounting on a bicycle wheel hub. The brake disc assembly includes an inner disc, an outer disc and a sensing ring. The inner disc includes a hub mounting part and an annular mounting part. The hub mounting portion has a plurality of internal spline teeth, and the internal spline teeth of the hub mounting portion are respectively used to mesh with a plurality of external spline teeth of the bicycle hub, so that the inner disc cannot rotate relative to the bicycle hub. The annular mounting portion is connected to the hub mounting portion. The outer disc has a disc mounting part, and the disc mounting part is installed on the annular mounting part. The sensing ring surrounds some internal spline teeth and is connected to one of the disc mounting part, the annular mounting part and the wheel hub mounting part.

According to the brake disc assembly disclosed in the above embodiment, the outer disc is connected to the inner disc, and the sensing ring is connected to the inner disc and is located between the internal spline teeth of the hub mounting part and the braking surface of the outer disc; or, The disc mounting portion of the outer disc and the sensing ring mounting portion of the sensing ring are connected to the connecting portion of the inner disc, and when viewed in the axial direction of the sensing ring, the annular sensing portion is located on the braking surface of the outer disc and between the connecting parts of the inner disc; or, the disc mounting part of the outer disc is installed on the annular mounting part of the inner disc, and the sensing ring surrounds these internal spline teeth and connects the disc mounting part and the ring One of the shaped mounting parts allows the sensing ring, inner disc and outer disc to be integrated together to achieve precise measurement of wheel speed, which is beneficial for the ABS system to use the highly accurate wheel speed as the basis for starting or not.

The above description of the content of the present invention and the following description of the embodiments are used to demonstrate and explain the principles of the present invention, and to provide further explanation of the patent application scope of the present invention.

See Figures 1 and 2. FIG. 1 is a schematic three-dimensional view of a brake disc assembly and a bicycle wheel hub according to a first embodiment of the present invention. Figure 2 is an exploded schematic diagram of Figure 1.

In this embodiment, the brake disc assembly 1 is installed on the bicycle hub 10 of a bicycle wheel (not shown). The bicycle hub 10 has a resisting surface 11 , an annular assembly wall 12 , a plurality of external spline teeth 13 and an internal thread structure 14 . The annular assembly wall portion 12 protrudes from the abutment surface 11 along the axial direction of the bicycle hub 10 . The annular assembly wall portion 12 has an outer annular surface 15 and an inner annular surface 16 , and the outer annular surface 15 faces away from the inner annular surface 16 . These external spline teeth 13 are located on the outer annular surface 15 of the annular assembly wall portion 12 , and the internal thread structure 14 is located on the inner annular surface 16 of the annular assembly wall portion 12 .

Next, please refer to Figures 2 to 4 together. FIG. 3 is an exploded schematic view of the brake disc assembly of FIG. 2 . FIG. 4 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 2 .

The brake disc assembly 1 includes an inner disc 100 , an outer disc 200 and a sensing ring 300 . The inner disc 100 includes a hub mounting part 110 and a connecting part 116, and the connecting part 116 has a plurality of connecting arm parts 120 and an annular mounting part 130. The hub mounting portion 110 of the inner disc 100 has a through hole 111 , a plurality of internal spline teeth 112 , a first abutment surface 113 , a second abutment surface 114 and a resistance applying structure 115 .

The internal spline teeth 112 of the hub mounting portion 110 of the inner disc 100 are located in the through holes 111. The internal spline teeth 112 are used to mesh with the external spline teeth 13 of the bicycle hub 10 respectively, so that the inner disc 100 cannot be relative to the bicycle. The hub 10 rotates.

The first abutment surface 113 and the second abutment surface 114 of the hub mounting portion 110 of the inner disc 100 are respectively located on opposite sides of the through hole 111 , where the first abutment surface 113 is used to abut the abutment surface 11 of the bicycle hub 10 . The resistance applying structure 115 is, for example, a concave and convex structure. The resistance applying structure 115 is located on the second abutting surface 114 and is used to abut a locking element 20 combined with the bicycle wheel hub 10 .

Specifically, the locking element 20 includes, for example, a flange portion 21 and a cylinder portion 22 . The flange portion 21 protrudes from the cylinder portion 22 along the radial direction of the cylinder portion 22 . The cylinder part 22 has an external thread structure 23. The external thread structure 23 of the cylinder part 22 is combined with the internal thread structure 14 of the bicycle hub 10, so that the flange part 21 of the locking element 20 presses against the second resistance of the hub mounting part 110. The resistance applying structure 115 on the supporting surface 114 and the first abutting surface 113 of the hub mounting part 110 press against the abutting surface 11 of the bicycle wheel hub 10 . That is to say, the flange portion 21 of the locking element 20 and the abutment surface 11 of the bicycle hub 10 jointly clamp the hub mounting portion 110 so that the inner disc 100 is positioned on the bicycle hub 10 in the axial direction of the bicycle hub 10 .

In this embodiment, the resistance applying structure 115 can increase the friction between the flange portion 21 of the locking element 20 and the hub mounting portion 110 to prevent the locking element 20 from unintentionally rotating relative to the hub mounting portion 110 and ensure that the locking element 20 The effect of positioning the inner disc 100 on the bicycle wheel hub 10.

It should be noted that the resistance applying structure 115 is not limited to a concave and convex structure. In other embodiments, the resistance applying structure may be any structure that increases friction between the flange portion of the locking element and the hub mounting portion. On the other hand, the resistance applying structure 115 is an optional structural configuration and can be omitted.

These connecting arm portions 120 are connected to the hub mounting portion 110 of the inner disc 100 and extend from different positions of the hub mounting portion 110 along the radial direction of the hub mounting portion 110 . One end of each connecting arm portion 120 away from the hub mounting portion 110 is connected to the annular mounting portion 130 . That is to say, the annular mounting part 130 is connected to the hub mounting part 110 through these connecting arm parts 120 , and the annular mounting part 130 surrounds the hub mounting part 110 . In other words, the annular mounting portion 130 connects two adjacent connecting arm portions 120 in the circumferential direction.

In this embodiment, the outer dish 200 and the sensing ring 300 are both connected to the annular mounting portion 130 of the inner dish 100 , and the outer dish 200 and the sensing ring 300 are two-piece components. The structures of the outer dish 200 and the sensing ring 300 and their connection relationship with the annular mounting portion 130 of the inner dish 100 will be described in detail below.

The outer dish 200 includes a ring body 210 and a plurality of extending arms 220 . The ring body 210 has two braking surfaces 211 and a plurality of heat dissipation holes 212. The two braking surfaces 211 are opposite to each other, and these heat dissipation holes 212 penetrate the two braking surfaces 211. The two braking surfaces 211 of the ring body 210 of the outer disc 200 are used to be pressed by a brake caliper (not shown) to decelerate the bicycle wheel. These extending arms 220 are respectively connected to different locations of the ring body 210 and extend toward the center of the ring body 210 . Each extension arm 220 has a disc mounting portion 221 , and the disc mounting portion 221 has a through hole 2211 .

In this embodiment, the brake disc assembly 1 may further include a plurality of first fasteners 400 , and the annular mounting portion 130 of the inner disc 100 has a plurality of first mounting holes 131 . The first fasteners 400 are, for example, rivets. The first fasteners 400 are installed in the through holes 2211 of the disc mounting portion 221 of the outer disc 200 and the first mounting holes 131 of the annular mounting portion 130 of the inner disc 100. The extending arms 220 of the outer dish 200 are fixed to the annular mounting portion 130 of the inner dish 100 .

It should be noted that the number of the first mounting holes 131 of the annular mounting portion 130 of the inner dish 100, the extending arms 220 of the outer dish 200, and the first fasteners 400 is not limited to multiple. In other embodiments, the number of the first mounting hole of the annular mounting portion of the inner dish, the extension arm of the outer dish, and the first fastener may be only one.

On the other hand, the type of the first fastener 400 is not limited to rivets. In other embodiments, the first fastener may be a screw or other suitable element.

The sensing ring 300 has an annular sensing part 310 and a plurality of sensing ring mounting parts 320 . The annular sensing portion 310 has a plurality of sensing holes 311 that are separated from each other, and these sensing holes 311 are arranged along the circumferential direction of the annular sensing portion 310 . These sensing holes 311 are used to be sensed by optical sensors (not shown), so that the wheel speed of the bicycle wheel can be known. These sensing ring mounting portions 320 are respectively connected to different locations on the inner edge of the annular sensing portion 310 . Each of the sensing ring mounting portions 320 has a through hole 321 .

In this embodiment, the brake disc assembly 1 may further include a plurality of second fasteners 500 , and the annular mounting portion 130 of the inner disc 100 has a plurality of second mounting holes 132 . The second fasteners 500 are, for example, screws. The second fasteners 500 pass through the through holes 321 of the sensing ring mounting portion 320 of the sensing ring 300 and are locked into the second fastening portions of the annular mounting portion 130 of the inner dish 100 . The mounting holes 132 allow the sensing ring mounting portions 320 of the sensing ring 300 to be fixed to the annular mounting portion 130 of the inner disc 100 , and the sensing ring 300 surrounds the internal spline teeth 112 of the hub mounting portion 110 of the inner disc 100 , and the sensing ring 300 is located between these inner spline teeth 112 of the hub mounting portion 110 and the braking surface 211 of the ring body 210 of the outer disc 200 . In addition, when viewed in the axial direction D of the sensing ring 300 , the annular sensing portion 310 of the sensing ring 300 is located between the braking surface 211 of the ring body 210 of the outer disc 200 and the connecting portion 116 of the inner disc 100 .

It should be noted that the number of the second mounting holes 132 of the annular mounting portion 130 of the inner disk 100, the sensing ring mounting portion 320 of the sensing ring 300, and the second fasteners 500 is not limited to multiple. In other embodiments, the number of the second mounting hole of the annular mounting portion of the inner disk, the sensing ring mounting portion of the sensing ring, and the second fastener may be only one.

On the other hand, the type of the second fastener 500 is not limited to screws. In other embodiments, the second fastener may be a rivet or other suitable element.

In this embodiment, the outer disc 200 is connected to the inner disc 100, and the sensing ring 300 is connected to the inner disc 100 and is located between the internal spline teeth 112 of the hub mounting portion 110 and the braking surface 211 of the outer disc 200. , or, by connecting the disk mounting portion 221 of the outer disk 200 and the sensing ring mounting portion 320 of the sensing ring 300 to the connecting portion 116 of the inner disk 100, and when viewed in the axial direction D of the sensing ring 300, The annular sensing portion 310 of the sensing ring 300 is located between the braking surface 211 of the ring body 210 of the outer disc 200 and the connecting portion 116 of the inner disc 100; or, it is installed through the disc mounting portion 221 of the outer disc 200. The annular mounting portion 130 of the inner disc 100 and the sensing ring 300 surround the inner spline teeth 112 and are connected to the annular mounting portion 130, so that the sensing ring 300, the inner disc 100 and the outer disc 200 can be integrated together. Achieving precise measurement of wheel speed, which helps the ABS system to determine whether to start based on the high-precision wheel speed.

In this embodiment, the brake disc assembly 1 may further include a sensing element mounting seat 600 , and the sensing element mounting seat 600 is disposed on one of the connecting arms 120 of the inner disc 100 . The sensing element mounting base 600 is used to install a sensing element (not shown), where the sensing element is, for example, a magnet, which is used in conjunction with a Hall sensor (not shown) to obtain information about the bicycle wheel. Approximate wheel speed. It should be noted that the sensing element mounting base 600 is not limited to being disposed on the connecting arm 120 . In other embodiments, the sensing element mounting seat may be disposed on the hub mounting portion of the inner disc.

In this embodiment, the sensing ring 300 is detachably installed on the inner dish 100 through the second fastener 500, and one of the connecting arms 120 of the inner dish 100 can be selectively provided with a sensing element for installation. The sensing element mounting base 600 is provided, so the user chooses to integrate at least one of the sensing ring 300 and the sensing element into the brake disc assembly 1 according to needs. For example, when it is necessary to measure the wheel speed with high precision, the sensing ring 300 can be installed on the inner disc 100 and matched with a corresponding sensor to obtain high-precision measurement of the wheel speed. Components and their corresponding sensors may not be used to save costs. On the other hand, when it is only necessary to obtain a rough measurement of the wheel speed, the sensing element can be installed on the sensing element mounting base 600 and matched with a corresponding sensor to obtain a rough measurement of the wheel speed. The measuring ring 300 and its corresponding sensor may not be used to save costs. Or, when it is necessary to know both high-precision measurement of wheel speed and rough measurement of wheel speed, the sensing ring 300 can be installed on the inner disc 100 and the sensing element can be installed on the sensing element mounting seat. 600, and are equipped with sensors corresponding to the sensing ring 300 and the sensing element respectively.

It should be noted that the sensing element mounting base 600 and the sensing element are optional components. In other embodiments, the sensing element mounting seat and the sensing element can be omitted.

Next, a brake disc assembly 1a of another embodiment will be described below. Please refer to Figure 5 and Figure 6. FIG. 5 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to a second embodiment of the present invention. FIG. 6 is an exploded schematic diagram of FIG. 5 .

In this embodiment, the brake disc assembly 1a is used to be installed on the bicycle hub 10 of a bicycle wheel (not shown), wherein the structure of the bicycle hub 10 is the same as the structure of the bicycle hub 10 described above with reference to Figures 1 and 2 , so the structure of the bicycle hub 10 will not be described again.

In this embodiment, the brake disc assembly 1a includes an inner disc 100a, an outer disc 200a and a sensing ring 300a. The inner disc 100a includes a hub mounting portion 110a and a connecting portion 116a, and the connecting portion 116a has a plurality of connecting arm portions 120a and an annular mounting portion 130a. The hub mounting portion 110a of the inner disc 100a has a through hole 111a, a plurality of internal spline teeth 112a, a first abutment surface 113a, a second abutment surface 114a and a resistance applying structure 115a.

The internal spline teeth 112a of the hub mounting portion 110a of the inner disc 100a are located in the through holes 111a. The internal spline teeth 112a are used to mesh with the external spline teeth 13 of the bicycle hub 10 respectively, so that the inner disc 100a cannot be relative to the bicycle. The hub 10 rotates.

The first abutment surface 113a and the second abutment surface 114a of the hub mounting portion 110a of the inner disc 100a are respectively located on opposite sides of the through hole 111a, where the first abutment surface 113a is used to abut the abutment surface 11 of the bicycle hub 10 . The resistance applying structure 115a is, for example, a concave and convex structure. The resistance applying structure 115a is located on the second resisting surface 114a and is used to resist a locking element 20 combined with the bicycle wheel hub 10 . The structure of the locking element 20 is the same as the structure of the locking element 20 described above with reference to FIGS. 1 and 2 , so the structure of the locking element 20 will not be described again.

The external thread structure 23 of the cylinder portion 22 of the locking element 20 is combined with the internal thread structure 14 of the bicycle hub 10, so that the flange portion 21 of the locking element 20 exerts resistance against the second abutment surface 114a of the hub mounting portion 110a. The structure 115a, and the first abutment surface 113a of the hub mounting portion 110a press against the abutment surface 11 of the bicycle hub 10. That is to say, the flange portion 21 of the locking element 20 and the abutment surface 11 of the bicycle hub 10 jointly clamp the hub mounting portion 110a, so that the inner disc 100a is positioned on the bicycle hub 10 in the axial direction of the bicycle hub 10.

In this embodiment, the resistance applying structure 115a can increase the friction between the flange portion 21 of the locking element 20 and the hub mounting portion 110a to prevent the locking element 20 from unintentionally rotating relative to the hub mounting portion 110a, thereby ensuring that the locking element 20 The effect of positioning the inner disc 100a on the bicycle wheel hub 10.

It should be noted that the resistance applying structure 115a is not limited to a concave and convex structure. In other embodiments, the resistance applying structure may be any structure that increases friction between the locking element and the hub mounting portion. On the other hand, the resistance applying structure 115a is an optional structural configuration and can be omitted.

These connecting arm portions 120a are connected to the hub mounting portion 110a of the inner disc 100a, and extend from different positions of the hub mounting portion 110a along the radial direction of the hub mounting portion 110a. One end of each connecting arm portion 120a away from the hub mounting portion 110a is connected to the annular mounting portion 130a. That is to say, the annular mounting part 130a is connected to the hub mounting part 110a through these connecting arm parts 120a, and the annular mounting part 130a surrounds the hub mounting part 110a.

In this embodiment, the outer dish 200a and the sensing ring 300a are both connected to the annular mounting portion 130a of the inner dish 100a, and the outer dish 200a and the sensing ring 300a are integrally formed. The structure of the outer dish 200a and the sensing ring 300a and the connection relationship between the two and the annular mounting portion 130a of the inner dish 100a will be described in detail below.

The outer dish 200a includes a ring body 210a and a plurality of extending arms 220a. The ring body 210a has two braking surfaces 211a and a plurality of heat dissipation holes 212a. The two braking surfaces 211a are opposite to each other, and these heat dissipation holes 212a penetrate the two braking surfaces 211a. The two braking surfaces 211a of the ring body 210a of the outer disc 200a are used to be pressed by a brake caliper (not shown) to decelerate the bicycle wheel. These extending arms 220a are respectively connected to different locations of the ring body 210a, and extend toward the center of the ring body 210a. Each extending arm 220a has a disc mounting portion 221a, and the disc mounting portion 221a has a through hole 2211a.

In this embodiment, the brake disc assembly 1a may further include a plurality of fasteners 400a, and the annular mounting portion 130a of the inner disc 100a has a plurality of mounting holes 131a. These fasteners 400a are, for example, rivets. These fasteners 400a are installed in the through holes 2211a of the disc mounting portion 221a of the outer disc 200a and the mounting holes 131a of the annular mounting portion 130a of the inner disc 100a, so that the outer disc 200a can The extension arm 220a is fixed to the annular mounting portion 130a of the inner dish 100a.

It should be noted that the number of the mounting holes 131a of the annular mounting portion 130a of the inner dish 100a, the extending arms 220a of the outer dish 200a and the fasteners 400a is not limited to multiple. In other embodiments, the number of mounting holes of the annular mounting portion of the inner dish, the extension arms of the outer dish, and the fasteners may be only one.

On the other hand, the type of fastener 400a is not limited to rivets. In other embodiments, the fasteners may be screws or other suitable elements.

The sensing ring 300a is integrally connected to the disk mounting portions 221a of the outer disk 200a, and the sensing ring 300a surrounds the internal spline teeth 112a of the hub mounting portion 110a of the inner disk 100a, and the sensing ring 300a is located on the hub mounting portion. Between these inner spline teeth 112a of the portion 110a and the braking surface 211a of the ring body 210a of the outer disc 200a. The sensing ring 300a has a plurality of sensing holes 310a that are separated from each other, and these sensing holes 310a are arranged along the circumferential direction of the sensing ring 300a. These sensing holes 310a are used to be sensed by optical sensors (not shown), so as to obtain the wheel speed of the bicycle wheels.

In this embodiment, the outer disc 200a is connected to the inner disc 100a, and the sensing ring 300a is connected to the inner disc 100a and is located between the inner spline teeth 112a of the hub mounting portion 110a and the braking surface 211a of the outer disc 200a. , or by installing the disc mounting portion 221a of the outer disc 200a on the annular mounting portion 130a of the inner disc 100a, and the sensing ring 300a surrounding these inner spline teeth 112a and connecting the disc mounting portion 221a, the sensing can be The ring 300a, the inner disc 100a and the outer disc 200a are integrated to achieve precise measurement of the wheel speed, which is advantageous for the ABS system to determine whether to start based on the highly accurate wheel speed.

In this embodiment, the brake disc assembly 1a may further include a sensing element mounting seat 500a. The sensing element mounting seat 500a is disposed on one of the connecting arm portions 120a of the inner disc 100a. The sensing element mounting base 500a is used to install a sensing element (not shown), where the sensing element is, for example, a magnet, which is used in conjunction with a Hall sensor (not shown) to obtain an overview of the wheel. wheel speed.

In this way, by using the sensing ring 300a, the sensing element and the sensors respectively corresponding to the above two, the high-precision measured wheel speed and the rough measured wheel speed can be known at the same time. It should be noted that the sensing element mounting base 500a is not limited to being provided on the connecting arm 120a. In other embodiments, the sensing element mounting seat may be disposed on the hub mounting portion of the inner disc. In addition, the sensing element mounting base 500a and the sensing element are optional components. In other embodiments, the sensing element mounting seat and the sensing element can be omitted.

See Figures 9 and 10. FIG. 9 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to the first embodiment of the present invention. FIG. 10 is an exploded schematic diagram of FIG. 9 .

In this embodiment, the brake disc assembly 1b is used to be installed on the bicycle hub 10 of a bicycle wheel (not shown), wherein the structure of the bicycle hub 10 is the same as the structure of the bicycle hub 10 described above with reference to Figures 1 and 2 , so the structure of the bicycle hub 10 will not be described again.

Next, please refer to Figures 10 to 12 together. FIG. 11 is an exploded schematic view of the brake disc assembly of FIG. 10 . FIG. 12 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 10 .

The brake disc assembly 1b includes an inner disc 100b, an outer disc 200b and a sensing ring 300b. The inner disc 100b includes a hub mounting portion 110b and a connecting portion 116b, and the connecting portion 116b has a plurality of connecting arm portions 120b and an annular mounting portion 130b. The hub mounting portion 110b of the inner disc 100b has a through hole 111b, a plurality of internal spline teeth 112b, a first abutment surface 113b, a second abutment surface 114b and a resistance applying structure 115b.

The internal spline teeth 112b of the hub mounting portion 110b of the inner disc 100b are located in the through holes 111b. The internal spline teeth 112b are used to mesh with the external spline teeth 13 of the bicycle hub 10 respectively, so that the inner disc 100b cannot be relative to the bicycle. The hub 10 rotates.

The first abutment surface 113b and the second abutment surface 114b of the hub mounting portion 110b of the inner disc 100b are respectively located on opposite sides of the through hole 111b, where the first abutment surface 113b is used to abut the abutment surface 11 of the bicycle hub 10 . The resistance applying structure 115b is, for example, a concave and convex structure. The resistance applying structure 115b is located on the second resisting surface 114b and is used to resist a locking element 20 combined with the bicycle wheel hub 10 . The structure of the locking element 20 is similar to the structure of the locking element 20 described above with reference to FIGS. 1 and 2 , so the structure of the locking element 20 will not be described again.

The external thread structure 23 of the cylinder portion 22 of the locking element 20 is combined with the internal thread structure 14 of the bicycle hub 10, so that the flange portion 21 of the locking element 20 exerts resistance against the second abutment surface 114b of the hub mounting portion 110b. The structure 115b and the first abutment surface 113b of the hub mounting portion 110b press against the abutment surface 11 of the bicycle hub 10 . That is to say, the flange portion 21 of the locking element 20 and the abutment surface 11 of the bicycle hub 10 jointly clamp the hub mounting portion 110b, so that the inner disc 100b is positioned on the bicycle hub 10 in the axial direction of the bicycle hub 10.

In this embodiment, the resistance applying structure 115b can increase the friction between the flange portion 21 of the locking element 20 and the hub mounting portion 110b to prevent the locking element 20 from unintentionally rotating relative to the hub mounting portion 110b, thereby ensuring that the locking element 20 The effect of positioning the inner disc 100b on the bicycle wheel hub 10.

It should be noted that the resistance applying structure 115b is not limited to the concave and convex structure. In other embodiments, the resistance applying structure may be any structure that increases friction between the locking element and the hub mounting portion. On the other hand, the resistance applying structure 115b is an optional structural configuration and can be omitted.

These connecting arm portions 120b are connected to the hub mounting portion 110b of the inner disc 100b, and extend from different positions of the hub mounting portion 110b along the radial direction of the hub mounting portion 110b. One end of each connecting arm portion 120b away from the hub mounting portion 110b is connected to the annular mounting portion 130b. That is to say, the annular mounting part 130b is connected to the hub mounting part 110b through these connecting arm parts 120b, and the annular mounting part 130b surrounds the hub mounting part 110b. In other words, the annular mounting portion 130b connects two adjacent connecting arm portions 120b in the circumferential direction.

In this embodiment, the outer dish 200b and the sensing ring 300b are two-piece components, and the outer dish 200b is connected to the annular mounting portion 130b of the inner dish 100b, and the sensing ring 300b is connected to the hub mounting of the inner dish 100b. Section 110b. The structures of the outer dish 200b and the sensing ring 300b will be described in detail below, as well as their connection relationships with the annular mounting portion 130b and the hub mounting portion 110b of the inner dish 100b respectively.

The outer dish 200b includes a ring body 210b and a plurality of extending arms 220b. The ring body 210b has two braking surfaces 211b and a plurality of heat dissipation holes 212b. The two braking surfaces 211b are opposite to each other, and these heat dissipation holes 212b penetrate the two braking surfaces 211b. The two braking surfaces 211b of the ring body 210b of the outer disc 200b are used to be pressed by a brake caliper (not shown) to decelerate the bicycle wheel. These extending arms 220b are respectively connected to different locations of the ring body 210b and extend toward the center of the ring body 210b. Each extension arm 220b has a disc mounting portion 221b, and the disc mounting portion 221b has a through hole 2211b.

In this embodiment, the brake disc assembly 1b may further include a plurality of first fasteners 400b, and the annular mounting portion 130b of the inner disc 100b has a plurality of first mounting holes 131b. These first fasteners 400b are, for example, rivets. These first fasteners 400b are installed in the through holes 2211b of the disc mounting portion 221b of the outer dish 200b and the first mounting holes 131b of the annular mounting portion 130b of the inner dish 100b. The extending arms 220b of the outer dish 200b are fixed to the annular mounting portion 130b of the inner dish 100b.

It should be noted that the number of the first mounting holes 131b of the annular mounting portion 130b of the inner dish 100b, the extending arms 220b of the outer dish 200b and the first fasteners 400b is not limited to multiple. In other embodiments, the number of the first mounting hole of the annular mounting portion of the inner dish, the extension arm of the outer dish, and the first fastener may be only one.

On the other hand, the type of the first fastener 400b is not limited to a rivet. In other embodiments, the first fastener may be a screw or other suitable element.

The sensing ring 300b has an annular sensing part 310b, a sensing ring mounting part 320b and a plurality of connecting arm parts 330b. The annular sensing part 310b has a plurality of sensing holes 311b that are separated from each other, and these sensing holes 311b are arranged along the circumferential direction of the annular sensing part 310b. These sensing holes 311b are used to be sensed by an optical sensor (not shown), and the wheel speed of the bicycle wheel can be known. The sensing ring mounting portion 320b is connected to different locations on the inner edge of the annular sensing portion 310b through these connecting arm portions 330b. The sensing ring mounting portions 320b each have a plurality of through holes 321b.

In this embodiment, the brake disc assembly 1b may further include a plurality of second fasteners 500b, and the hub mounting portion 110b of the inner disc 100b has a plurality of second mounting holes 117b. The second fasteners 500b are, for example, screws. The second fasteners 500b are inserted through the through holes 321b of the sensing ring mounting portion 320b of the sensing ring 300b and locked into the second mounting holes of the hub mounting portion 110b of the inner disc 100b. 117b, so that the sensing ring mounting portion 320b of the sensing ring 300b is fixed to the hub mounting portion 110b of the inner dish 100b and abuts and connected to the connecting portion 116b of the inner dish 100b, and the sensing ring 300b is installed around the hub of the inner dish 100b. The inner spline teeth 112b of the portion 110b, and the sensing ring 300b are located between the inner spline teeth 112b of the hub mounting portion 110b and the braking surface 211b of the ring body 210b of the outer disc 200b. In addition, when viewed in the axial direction D of the sensing ring 300b, the annular sensing portion 310b of the sensing ring 300b is located between the braking surface 211b of the ring body 210b of the outer disc 200b and the connecting portion 116b of the inner disc 100b.

It should be noted that the number of the second mounting holes 117b of the hub mounting portion 110b of the inner disc 100b, the through holes 321b of the sensing ring mounting portion 320b of the sensing ring 300b, and the number of second fasteners 500b is not limited to multiple. In other embodiments, the number of the second mounting hole of the hub mounting portion of the inner disc, the through hole of the sensing ring mounting portion of the sensing ring, and the second fastener may be only one.

On the other hand, the type of the second fastener 500b is not limited to a screw. In other embodiments, the second fastener may be a rivet or other suitable element.

In this embodiment, the outer disc 200b is connected to the inner disc 100b, and the sensing ring 300b is connected to the inner disc 100b and is located between the internal spline teeth 112b of the hub mounting portion 110b and the braking surface 211b of the outer disc 200b. ; Or, by connecting the disk mounting portion 221b of the outer disk 200b and the sensing ring mounting portion 320b of the sensing ring 300b to the connecting portion 116b of the inner disk 100b, and when viewed in the axial direction D of the sensing ring 300b, The annular sensing portion 310b of the sensing ring 300b is located between the braking surface 211b of the ring body 210b of the outer disc 200b and the connecting portion 116b of the inner disc 100b; or, it is installed through the disc mounting portion 221b of the outer disc 200b. The annular mounting portion 130b of the inner disc 100b and the sensing ring 300b surround the inner spline teeth 112b and are connected to the hub mounting portion 110b, so that the sensing ring 300b, the inner disc 100b and the outer disc 200b can be integrated together to achieve The precise measurement of wheel speed helps the ABS system to determine whether to start based on the high-precision wheel speed.

In this embodiment, the brake disc assembly 1b may further include a sensing element mounting seat 600b. The sensing element mounting seat 600b is disposed on one of the connecting arm portions 120b of the inner disc 100b. The sensing element mounting base 600b is used to install a sensing element (not shown), where the sensing element is, for example, a magnet, which is used in conjunction with a Hall sensor (not shown) to obtain an overview of the wheel. wheel speed.

In this way, by using the sensing ring 300b, the sensing element and the sensors respectively corresponding to the above two, the high-precision measured wheel speed and the rough measured wheel speed can be obtained at the same time. It should be noted that the sensing element mounting base 600b is not limited to being provided on the connecting arm 120b. In other embodiments, the sensing element mounting seat may be disposed on the hub mounting portion of the inner disc. In addition, the sensing element mounting base 600b and the sensing element are optional components. In other embodiments, the sensing element mounting seat and the sensing element can be omitted.

See Figures 13 and 14. FIG. 13 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to the first embodiment of the present invention. FIG. 14 is an exploded schematic diagram of FIG. 13 .

In this embodiment, the brake disc assembly 1c is used to be installed on the bicycle hub 10 of a bicycle wheel (not shown). The structure of the bicycle hub 10 is the same as the structure of the bicycle hub 10 described above with reference to Figures 1 and 2. , so the structure of the bicycle hub 10 will not be described again.

Next, please refer to Figures 10 to 12 together. FIG. 11 is an exploded schematic view of the brake disc assembly of FIG. 10 . FIG. 12 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 10 .

The brake disc assembly 1c includes an inner disc 100c, an outer disc 200c and a sensing ring 300c. The inner disc 100c includes a hub mounting portion 110c and a connecting portion 116c, and the connecting portion 116c has a plurality of connecting arm portions 120c and an annular mounting portion 130c. The hub mounting portion 110c of the inner disc 100c has a through hole 111c, a plurality of internal spline teeth 112c, a first abutment surface 113c, a second abutment surface 114c and a resistance applying structure 115c.

The internal spline teeth 112c of the hub mounting portion 110c of the inner disc 100c are located in the through holes 111c. The internal spline teeth 112c are used to mesh with the external spline teeth 13 of the bicycle hub 10 respectively, so that the inner disc 100c cannot be relative to the bicycle. The hub 10 rotates.

The first abutment surface 113c and the second abutment surface 114c of the hub mounting portion 110c of the inner disc 100c are respectively located on opposite sides of the through hole 111c, where the first abutment surface 113c is used to abut the abutment surface 11 of the bicycle hub 10 . The resistance applying structure 115c is, for example, a concave and convex structure, and the resistance applying structure 115c is located on the second resisting surface 114c.

These connecting arm portions 120c are connected to the hub mounting portion 110c of the inner disc 100c, and extend from different positions of the hub mounting portion 110c along the radial direction of the hub mounting portion 110c. One end of each connecting arm portion 120c away from the hub mounting portion 110c is connected to the annular mounting portion 130c. That is to say, the annular mounting part 130c is connected to the hub mounting part 110c through these connecting arm parts 120c, and the annular mounting part 130c surrounds the hub mounting part 110c. In other words, the annular mounting portion 130c connects two adjacent connecting arm portions 120c in the circumferential direction.

In this embodiment, the outer dish 200c and the sensing ring 300c are two-piece components, and the outer dish 200c is connected to the annular mounting portion 130c of the inner dish 100c, and the sensing ring 300c is connected to the hub mounting of the inner dish 100c. Section 110c. The structures of the outer disk 200c and the sensing ring 300c will be described in detail below, as well as their connection relationships with the annular mounting portion 130c and the hub mounting portion 110c of the inner dish 100c respectively.

The outer dish 200c includes a ring body 210c and a plurality of extending arms 220c. The ring body 210c has two braking surfaces 211c and a plurality of heat dissipation holes 212c. The two braking surfaces 211c are opposite to each other, and these heat dissipation holes 212c penetrate the two braking surfaces 211c. The two braking surfaces 211c of the ring body 210c of the outer disc 200c are used to be pressed by a brake caliper (not shown) to decelerate the bicycle wheel. These extending arms 220c are respectively connected to different locations of the ring body 210c and extend toward the center of the ring body 210c. Each extension arm 220c has a disc mounting portion 221c, and the disc mounting portion 221c has a through hole 2211c.

In this embodiment, the brake disc assembly 1c may further include a plurality of first fasteners 400c, and the annular mounting portion 130c of the inner disc 100c has a plurality of first mounting holes 131c. These first fasteners 400c are, for example, rivets. These first fasteners 400c are installed in the through holes 2211c of the disc mounting portion 221c of the outer dish 200c and the first mounting holes 131c of the annular mounting portion 130c of the inner dish 100c. These extending arms 220c of the outer dish 200c are fixed to the annular mounting portion 130c of the inner dish 100c.

It should be noted that the number of the first mounting holes 131c of the annular mounting portion 130c of the inner dish 100c, the extending arms 220c of the outer dish 200c and the first fasteners 400c is not limited to multiple. In other embodiments, the number of the first mounting hole of the annular mounting portion of the inner dish, the extension arm of the outer dish, and the first fastener may be only one.

On the other hand, the type of the first fastener 400c is not limited to a rivet. In other embodiments, the first fastener may be a screw or other suitable element.

The sensing ring 300c has an annular sensing part 310c, a sensing ring mounting part 320c and a plurality of connecting arm parts 330c. The annular sensing part 310c has a plurality of sensing holes 311c that are separated from each other, and these sensing holes 311c are arranged along the circumferential direction of the annular sensing part 310c. These sensing holes 311c are used to be sensed by optical sensors (not shown), so as to know the wheel speed of the bicycle wheels. The sensing ring mounting portion 320c is connected to different locations on the inner edge of the annular sensing portion 310c through these connecting arm portions 330c.

In this embodiment, the sensing ring mounting portion 320c of the sensing ring 300c has a first surface 321c, a second surface 322c, a first resistance applying structure 323c and a second resistance applying structure 324c. The first surface 321c faces the hub mounting portion 110c of the inner dish 100c, while the second surface 322c faces away from the first surface 321c. The first resistance applying structure 323c and the second resistance applying structure 324c are both concave and convex structures. The first resistance applying structure 323c and the second resistance applying structure 324c are respectively located on the first surface 321c and the second surface 322c.

The first resistance applying structure 323c of the sensing ring mounting portion 320c of the sensing ring 300c abuts against the resistance applying structure 115c of the hub mounting portion 110c of the inner dish 100c. Thereby, the friction force between the sensing ring mounting portion 320c of the sensing ring 300c and the hub mounting portion 110c of the inner disc 100c is increased to prevent the sensing ring mounting portion 320c of the sensing ring 300c from being mounted relative to the hub mounting portion of the inner disc 100c. Part 110c rotates.

The second resistance applying structure 324c of the sensing ring mounting portion 320c of the sensing ring 300c is used to abut a locking element 20 combined with the bicycle wheel hub 10. The structure of the locking element 20 is similar to the structure of the locking element 20 described above with reference to FIGS. 1 and 2 , so the structure of the locking element 20 will not be described again.

The external thread structure 23 of the cylinder part 22 of the locking element 20 is combined with the internal thread structure 14 of the bicycle hub 10, so that the flange part 21 of the locking element 20 presses against the second surface of the sensing ring mounting part 320c of the sensing ring 300c. The second resistance applying structure 324c on 322c and the first abutment surface 113c of the hub mounting portion 110c press against the abutment surface 11 of the bicycle wheel hub 10. That is to say, the flange portion 21 of the locking element 20 and the abutment surface 11 of the bicycle hub 10 jointly clamp the hub mounting portion 110c and the sensing ring mounting portion 320c, and the sensing ring mounting portion 320c abuts and is connected to the inner disc. The connecting portion 116c of 100c enables the inner disc 100c and the sensing ring 300c to be positioned on the bicycle hub 10 in the axial direction of the bicycle hub 10 .

In this embodiment, the second resistance applying structure 324c can increase the friction force between the flange portion 21 of the locking element 20 and the sensing ring mounting portion 320c to prevent the locking element 20 from unintentionally relative to the sensing ring mounting portion 320c. Rotate to ensure the effect of the locking element 20 in positioning the inner disc 100c and the sensing ring 300c on the bicycle hub 10.

It should be noted that the aforementioned resistance applying structure is not limited to a concave and convex structure. In other embodiments, the resistance applying structure may be any structure that increases friction. On the other hand, the aforementioned resistance applying structure is an optional structural configuration and can be omitted.

In this embodiment, the outer disc 200c is connected to the inner disc 100c, and the sensing ring 300c is connected to the inner disc 100c and is located between the inner spline teeth 112c of the hub mounting portion 110c and the braking surface 211c of the outer disc 200c. , or, by connecting the disk mounting portion 221c of the outer disk 200c and the sensing ring mounting portion 320c of the sensing ring 300c to the connecting portion 116c of the inner disk 100c, and when viewed in the axial direction D of the sensing ring 300c, The annular sensing portion 310c of the sensing ring 300c is located between the braking surface 211c of the ring body 210c of the outer disc 200c and the connecting portion 116c of the inner disc 100c; or, it is installed through the disc mounting portion 221c of the outer disc 200c. The annular mounting portion 130c of the inner disc 100c and the sensing ring 300c surround the inner spline teeth 112c and are connected to the hub mounting portion 110c of the inner disc 100c, so that the sensing ring 300c, the inner disc 100c and the outer disc 200c can be integrated. At the same time, it can achieve precise measurement of wheel speed, which will help the ABS system to determine whether to start based on the high-precision wheel speed.

In this embodiment, the brake disc assembly 1c may further include a sensing element mounting seat 500c. The sensing element mounting seat 500c is disposed on one of the connecting arm portions 120c of the inner disc 100c. The sensing element mounting base 500c is used to install a sensing element (not shown), where the sensing element is, for example, a magnet, which is used in conjunction with a Hall sensor (not shown) to obtain an overview of the wheel. wheel speed.

In this way, by using the sensing ring 300c, the sensing element and the sensors respectively corresponding to the above two, the high-precision measured wheel speed and the rough measured wheel speed can be known at the same time. It should be noted that the sensing element mounting base 500c is not limited to being provided on the connecting arm portion 120c. In other embodiments, the sensing element mounting seat may be disposed on the hub mounting portion of the inner disc. In addition, the sensing element mounting base 500c and the sensing element are optional components. In other embodiments, the sensing element mounting seat and the sensing element can be omitted.

According to the brake disc assembly disclosed in the above embodiment, the outer disc is connected to the inner disc, and the sensing ring is connected to the inner disc and is located between the internal spline teeth of the hub mounting part and the braking surface of the outer disc; or, The disc mounting portion of the outer disc and the sensing ring mounting portion of the sensing ring are connected to the connecting portion of the inner disc, and when viewed in the axial direction of the sensing ring, the annular sensing portion is located on the braking surface of the outer disc and between the connecting parts of the inner disc; or, the disc mounting part of the outer disc is installed on the annular mounting part of the inner disc, and the sensing ring surrounds these internal spline teeth and connects the disc mounting part and the ring One of the shaped mounting parts allows the sensing ring, inner disc and outer disc to be integrated together to achieve precise measurement of wheel speed, which is beneficial for the ABS system to use the highly accurate wheel speed as the basis for starting or not.

Although the present invention has been disclosed in the foregoing preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the similar art can make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The scope of patent protection for an invention shall be determined by the scope of the patent application attached to this specification.

1,1a,1b,1c: brake disc assembly 10:Bicycle hub 11: Resisting surface 12: Ring assembled wall 13:External spline teeth 14: Internal thread structure 15: Outer ring surface 16:Inner ring surface 20: Locking element 21:Flange part 22:Cylinder part 23: External thread structure 100,100a,100b,100c:Inner disc 110,110a,110b,110c: Hub mounting part 111,111a,111b,111c: perforation 112,112a,112b,112c: Internal spline teeth 113,113a,113b,113c: first contact surface 114,114a,114b,114c: second contact surface 115,115a,115b,115c: Resistance applying structure 116,116a,116b,116c: connection part 117b: Second mounting hole 120,120a,120b,120c: connecting arm 130,130a,130b,130c: Ring mounting part 131,131b,131c: first mounting hole 132:Second mounting hole 131a:Mounting hole 200,200a,200b,200c: external disc 210,210a,210b,210c: ring body 211,211a,211b,211c: braking surface 212, 212a, 212b, 212c: heat dissipation holes 220, 220a, 220b, 220c: extension arm 221,221a,221b,221c: Disc installation part 2211, 2211a, 2211b, 2211c: perforation 300, 300a, 300b, 300c: sensing ring 310, 310b, 310c: ring sensing part 310a: Sensing hole 311, 311b, 311c: sensing hole 320, 320b, 320c: Sensing ring installation part 321c: first surface 322c: Second surface 323c: First resistance applying structure 324c: Second resistance applying structure 321,321b: perforation 330b, 330c: connecting arm 400, 400b, 400c: first fastener 400a: Fasteners 500,500b: Second fastener 600,500a,600b,500c: Sensing element mounting base D: direction

FIG. 1 is a schematic three-dimensional view of a brake disc assembly and a bicycle wheel hub according to a first embodiment of the present invention. Figure 2 is an exploded schematic diagram of Figure 1. FIG. 3 is an exploded schematic view of the brake disc assembly of FIG. 2 . FIG. 4 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 2 . FIG. 5 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to a second embodiment of the present invention. FIG. 6 is an exploded schematic diagram of FIG. 5 . FIG. 7 is an exploded schematic view of the brake disc assembly of FIG. 6 . FIG. 8 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 6 . FIG. 9 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to a third embodiment of the present invention. FIG. 10 is an exploded schematic diagram of FIG. 9 . FIG. 11 is an exploded schematic view of the brake disc assembly of FIG. 10 . FIG. 12 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 10 . FIG. 13 is a schematic perspective view of a brake disc assembly and a bicycle wheel hub according to a third embodiment of the present invention. FIG. 14 is an exploded schematic diagram of FIG. 13 . FIG. 15 is an exploded schematic view of the brake disc assembly of FIG. 14 . FIG. 16 is an exploded schematic view of the brake disc assembly from another perspective of FIG. 14 .

1: Brake disc assembly

10:Bicycle hub

11: Resisting surface

12: Ring assembled wall

13:External spline teeth

14: Internal thread structure

15: Outer ring surface

16:Inner ring surface

20: Locking element

21:Flange part

22:Cylinder part

23: External thread structure

100:Inner disc

110: Wheel hub installation part

112: Internal spline teeth

116:Connection part

120:Connect the arm

130: Ring mounting part

200:External disc

210: Ring body

211: Braking surface

300: Sensing ring

310: Ring sensing part

400:First fastener

500:Second fastener

D: direction

Claims (4)

A brake disc assembly used to be installed on a bicycle wheel hub, including: an inner disc, including a hub mounting portion, the hub mounting portion has a plurality of internal spline teeth, and the internal spline teeth of the hub mounting portion are respectively A plurality of external spline teeth for engaging with the bicycle hub so that the inner disc cannot rotate relative to the bicycle hub; an outer disc is connected to the inner disc and has a braking surface; and a sensing ring is connected In the inner disc, and between the inner spline teeth of the hub mounting part and the braking surface of the outer disc; wherein the sensing ring and the outer disc are two-piece components, the brake disc assembly It further includes a first fastener and a second fastener. The inner disc further includes an annular mounting part connected to the hub mounting part. The annular mounting part has a first mounting hole and a The second mounting hole, the outer disc has a disc mounting portion, the first fastener is installed on the first mounting hole of the annular mounting portion of the inner disc and the disc mounting portion of the outer disc, the The sensing ring has a sensing ring mounting part, and the second fastener is installed on the second mounting hole of the annular mounting part of the inner dish and the sensing ring mounting part of the sensing ring. The brake disc assembly of claim 1 further includes a sensing element mounting seat, the inner disc further includes a connecting arm portion, the annular mounting portion is connected to the wheel hub mounting portion through the connecting arm portion, and the sensing element The component mounting base is provided on the connecting arm. The brake disc assembly of claim 1, wherein the hub mounting portion has a through hole, a first abutment surface, a second abutment surface and a resistance applying structure, and the internal spline teeth are located in the through hole, The first abutment surface and the second abutment surface are respectively located on opposite sides of the through hole. The first abutment surface is used to abut the bicycle wheel hub. The resistance applying structure is located on the second abutment surface and uses to abut a locking element coupled to the bicycle wheel hub. A brake disc assembly for mounting on a bicycle hub, including: an inner disc, including a hub mounting part and an annular mounting part, the hub mounting part has a plurality of internal spline teeth, the hub mounting part The inner spline teeth are respectively used to mesh with the plurality of outer spline teeth of the bicycle hub, so that the inner disc cannot rotate relative to the bicycle hub. The annular mounting part is connected to the hub mounting part; an outer disc has A disc mounting part, the disc mounting part is installed on the annular mounting part; and a sensing ring surrounds the inner spline teeth and connects the hub mounting part, and the sensing ring and the outer disc It is a two-piece component.