JP2007232090A - Brake disk of vehicle braking device and motorcycle with the brake disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brake disk of a vehicle braking device and a motorcycle with the brake disk, decreasing the number of parts and reducing the weight, and avoiding the problems of inspection maintenance and damage. <P>SOLUTION: This brake disk 12 of the vehicle braking device includes: a disk bracket 16 fitted to a wheel 7; and an annular disk plate 17 disposed surrounding the outer periphery of the disk bracket 16 and connected to the disk bracket 16 through a connecting pin 18, wherein an electromagnetic pickup magnet 20 is buried in the disk bracket 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a brake disc for a vehicle braking device including a disc bracket attached to a hub of a wheel, and a disc plate coupled to the disc bracket so as to surround an outer periphery of the disc bracket, and a motorcycle including the brake disc.

Conventionally, in a motorcycle, when a rotational speed of a wheel is detected by a vehicle speed sensor as a signal for controlling an ABS device or an engine, a rotor in which unevenness or a through hole is formed is concentric with a disk plate on a wheel hub. In general, a structure in which an electromagnetic pickup is attached to the vehicle body side so as to face the unevenness or through hole of the rotor is employed (see Patent Document 1).
Japanese Patent No. 3000531

  However, the conventional vehicle speed sensor requires a dedicated rotor, which increases the number of parts and weight. In addition, since the conventional device is a method of detecting the unevenness of the rotor with an electromagnetic pickup, it is necessary to make the electromagnetic pickup face the unevenness of the rotor with a slight gap therebetween, the inspection and maintenance is poor, and the electromagnetic pickup is There is also a problem that it is easily damaged.

  It is an object of the present invention to provide a brake disc for a vehicle braking device that can reduce the number of parts and reduce the weight, and can avoid problems of inspection and maintenance and damage, and a motorcycle including the brake disc. .

  The present invention relates to a brake for a vehicle braking device, comprising: a disc bracket attached to a wheel; and an annular disc plate disposed so as to surround the outer periphery of the disc bracket and coupled to the disc bracket via a connecting member. A disk is characterized in that an electromagnetic pickup magnet is embedded in the disk bracket.

  In the present invention, since the magnet for electromagnetic pickup is embedded in the disk bracket which is a component part of the brake disk, a dedicated rotor required in the conventional apparatus can be eliminated, and an increase in the number of parts and an increase in weight can be avoided. In addition, since the magnet is embedded, the electromagnetic pickup can be arranged at a relatively large interval with respect to the magnet, the maintenance of the electromagnetic pickup can be improved, and damage to the electromagnetic pickup can be avoided. .

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 are views for explaining a motorcycle including a braking device according to an embodiment of the present invention. In the present embodiment, front and rear and left and right mean front and rear and left and right when viewed in a seated state.

  In the figure, reference numeral 1 denotes a road racing motorcycle, which has the following schematic structure. A front fork 3 is supported by a head pipe at the front end of the body frame 2 so as to be steerable left and right. A front wheel 4 is pivotally supported at the lower end of the front fork 3, and a steering handle 5 is attached to the upper end. The rear arm 6 is pivotally supported by the rear arm bracket 2a of the vehicle body frame 2 so as to swing up and down, and a rear wheel position adjusting bracket 13 is attached to the rear end portion of the rear arm 6 so that the position in the front-rear direction can be adjusted. The rear wheel 7 is supported by a rear wheel shaft 7 a fixed to the bracket 13. Although not shown, the sprocket mounted on the rear side of the rear wheel 7 in FIG. 1 and the drive sprocket mounted on the engine-side output shaft are connected by a drive chain. Further, 8 is a fuel tank, 9 is a seat, and 10 is a vehicle body cover.

  A brake disc 12 of a rear wheel braking device 11 is attached to the hub of the rear wheel 7. Further, the hydraulic caliper 14 of the rear wheel braking device 11 is attached to the bracket 13 side, so that the relative position between the hydraulic caliper 14 and the brake disk 12 can be kept constant even when the rear wheel position is adjusted.

  The bracket 13 is formed with a pickup mounting boss portion 13a extending upward, and an electromagnetic pickup 15 constituting a stationary part of the vehicle speed sensor is attached to the boss portion 13a. The electromagnetic pickup 15 is disposed so as to face a magnet 20 (to be described later) of the brake disk 12.

  The brake disc 12 is disposed so as to surround a light alloy disc bracket 16 fixed to the hub of the rear wheel 7 by bolts 19 and an outer periphery of the disc bracket 16. In the embodiment, a disk plate 17 made of cast iron is provided which is connected via connecting pins (connecting members) 18 arranged at intervals of eight equiangular intervals. The disk plate 17 is coupled so as to form a so-called floating structure that can move a little relative to the disk bracket 16. This floating structure prevents heat during braking from being transmitted from the disk plate 17 side to the disk bracket 16 side.

  The disk plate 17 has an annular shape, and a large number of concave portions 17c are formed in a hemispheric shape on the side surface, and an annular concave groove 17d is formed on the outer peripheral surface. The concave portions 17c and the concave grooves 17d have a function of increasing the heat radiation area and increasing the heat radiation performance.

  Eight connecting boss portions 17a are formed on the inner peripheral edge of the disk plate 17 so as to protrude inward at equal angular intervals so as to correspond to the connecting pins 18. A connecting hole 17b slightly larger than the diameter of the connecting pin 18 is formed in the connecting boss portion 17a in a semicircular shape.

  Here, the connecting boss portion 17a is formed such that the front portion in the rotation direction B protrudes inwardly more than the rear portion. Therefore, the circumferential length on the front side in the rotational direction B across the straight line A passing through the axle axis C of the coupling hole 17b (the length of the portion in contact with the coupling pin 18) a is the circumferential length on the rear side (the coupling pin 18 and The length of the contacting portion is longer than b).

  The disk bracket 16 is of a spoke type in which an inner rim portion 16a and an outer rim portion 16b are integrally coupled by a plurality of spoke portions 16c.

  The inner rim portion 16a has a circular shape, and the outer rim portion 16b has a polygonal shape. In the present embodiment, the outer rim portion 16b has a regular octagonal shape having eight apex portions D. In addition, the spoke portion 16c is provided in an integral multiple of the connecting pin 18, twice in the present embodiment, and is arranged so as to face each apex portion D of the outer rim portion 16b, The inner rim portion 16a and the outer rim portion 16b are integrally coupled.

  A connecting hole 16d slightly larger than the diameter of the connecting pin 18 is formed in a semicircular shape on the outer peripheral edge of the disk bracket 16.

  Here, the connecting hole 16d is slightly deviated from the apex portion D to the front side in the rotational direction B. Therefore, the connecting hole 16d is located behind the rotational direction B across the straight line A passing through the axle axis C. The circumferential length on the side (the length of the portion in contact with the connecting pin 18) c is longer than the circumferential length on the front side (the length of the portion in contact with the connecting pin 18) d.

  In each spoke portion 16c, a magnet 20 detected by the electromagnetic pickup 15 is embedded. The magnet 20 is an integral multiple of the connecting pin 18 and is provided in the same number as the spoke portion 16c, that is, 16 in this embodiment, so as to form a concentric circle centered on the axis C, and equiangularly spaced. It is arranged for each. The magnet 20 is disposed in a holding hole that is recessed on the opposite side of the spoke 16c to the electromagnetic pickup 15, and is sealed with a resin 20a. The distance between the front end surface of the electromagnetic pickup 15 and the surface of the magnet 20 burying portion is set to a large dimension G as compared with the conventional device of the unevenness or through hole detection type.

  The connection hole 17b and the connection hole 16d are arranged so as to be coaxial, and the connection pin 18 is inserted into the connection hole 18 so as to be loosely fitted. The connecting pin 18 abuts the flange portion 18a of the connecting pin 17 on the periphery of the connecting holes 17b and 16d and mounts a snap ring 18b on the opposite side, thereby bringing the disc plate 17 and the disc bracket 16 into a floating state. Is bound to.

  In the present embodiment, a plurality of magnets for electromagnetic pickup 20 are embedded in the disk bracket 16 that is a component of the brake disk 12 so as to form a concentric circle with the axle shaft center C as the center. Can be eliminated, and an increase in the number of parts and an increase in weight can be avoided. In addition, since the magnet 20 is embedded, the electromagnetic pickup 15 can be arranged with a relatively large gap G with respect to the magnet 20, and inspection and maintenance such as removal of the electromagnetic pickup 15 and the brake disk 12 can be improved. Damage to the electromagnetic pickup 15 can be avoided.

  Since the electromagnetic pickup 15 is attached to the rear wheel position adjusting bracket 13 for absorbing the chain extension, the relative position between the electromagnetic pickup 15 and the magnet 20 can be kept constant before and after the chain adjustment. There is no need to adjust the position of the electromagnetic pickup during adjustment, and the chain adjustment work is simple.

  The disk bracket 16 is a spoke type in which the inner rim portion 16a and the outer rim portion 16b are integrally coupled by the same number of spoke portions 16c as the electromagnetic pickup magnet 20, and the electromagnetic pickup magnet 20 is Since it is embedded in the spoke portion 16c, it is possible to adopt a hollow shape in which only the embedded portion of the magnet 20 is left and the other portions are thinned, and the weight is significantly reduced as compared with the case where the disk bracket is an annular shape. Can be achieved.

  In addition, since the electromagnetic pickup magnet 20 is an integral multiple of the connecting pin 18 and the spoke portions 16c are provided in the same number as the magnet 20, the hollow shape can be optimized and two spoke portions 16c can be provided on the outer rim. It can be combined with the apex angle portion D of the portion 16b, and can have a well-balanced shape that can surely satisfy the required strength of the disk bracket 16.

  Further, since the connecting pin 18 is disposed at a position deviated forward in the rotational direction with respect to the apex portion D, the contact of the connecting hole 16d of the disk bracket 16 on the rear side in the rotational direction with respect to the connecting pin 18. The length c becomes longer than the contact length d on the front side, the surface pressure of the connecting hole 16d of the disc bracket 16 due to the braking force can be reduced, and wear on the periphery of the connecting hole 16d can be suppressed.

  For the disk plate 17, since the contact length a on the front side in the rotational direction with respect to the connecting pin 18 is made longer than the contact length b on the rear side, the surface pressure of the connecting hole 17b of the disk plate 17 due to braking force can be reduced. Wear of the peripheral edge of the connecting hole 17b can be suppressed.

  In the above embodiment, the case where the outer rim portion 16b of the disk bracket 16 is polygonal has been described. However, the outer rim portion of the present invention may be circular.

  In the above embodiment, the case where the disk bracket 16 is a spoke type has been described. However, the disk bracket of the present invention may be annular.

  Moreover, although the case of the rear wheel braking device has been described in the above embodiment, the present invention can also be applied to the front wheel braking device. Moreover, although the case where the brake disc of the braking device is applied to a motorcycle has been described, the brake disc of the present invention can also be applied to a braking device for an automobile.

1 is a right side view of a motorcycle according to an embodiment of the present invention. Fig. 3 is a right side view of a brake disc portion of the motorcycle. Fig. 3 is a right side view of a brake disc portion of the motorcycle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motorcycle 7 Wheel 7a Axle 12 Brake disc 15 Electromagnetic pickup 16 Disc bracket 16a Inner rim portion 16b Outer rim portion 16c Spoke portion 16d Disc bracket side connection hole 17 Disc plate 17b Disc plate side connection hole 18 Connection pin (connection member) )
20 Magnets a and d Contact lengths b and c on the front side in the rotation direction Contact lengths B on the rear side in the rotation direction B Rotation direction D

Claims (9)

A brake disc for a vehicle braking device, comprising: a disc bracket attached to a wheel; and an annular disc plate disposed so as to surround an outer periphery of the disc bracket and coupled to the disc bracket via a connecting member. ,
A brake disk for a vehicle braking device, wherein an electromagnetic pickup magnet is embedded in the disk bracket.   2. The brake disk for a vehicle brake device according to claim 1, wherein the plurality of magnets for electromagnetic pickup are embedded in the disk bracket so as to form a concentric circle centered on an axle. The disk bracket according to claim 2, comprising an inner rim portion, an outer rim portion, and a plurality of spoke portions that connect the outer rim portion and the inner rim.
The brake disk of a braking device for a vehicle, wherein the magnet for electromagnetic pickup is embedded in the spoke portion.   4. The brake disk for a vehicle brake device according to claim 3, wherein the number of the magnets for electromagnetic pickup is an integral multiple of the number of the connecting members.   5. The brake disk for a vehicle brake device according to claim 4, wherein the number of the spoke portions is the same as the number of the electromagnetic pickup magnets.   4. The brake disk for a vehicle brake device according to claim 3, wherein the outer rim portion is formed in a polygonal shape, and the spoke portion is coupled to a vertex portion of the outer rim portion.   7. The brake disk for a vehicle brake device according to claim 6, wherein the connecting member is disposed at a position deviated forward in the rotational direction with respect to the apex angle portion.   7. The connecting member according to claim 6, wherein the connecting member is a connecting pin inserted into a connecting hole formed in common with the disc bracket and the disc plate, and the direction of rotation of the connecting hole on the disc bracket side with respect to the connecting pin. The length of the contact portion on the rear side is longer than the length of the contact portion on the front side, and the length of the contact portion on the front side in the rotation direction of the connection hole on the disk plate side with respect to the connection pin is on the rear side. A brake disc for a vehicle braking device, wherein the brake disc is configured to be longer than a length of a contact portion. The vehicle body frame, a rear arm that is swingably supported by the vehicle body frame, a rear wheel position adjustment bracket that is fixed to the rear wheel shaft and is supported by the rear arm so that the position of the rear wheel shaft can be adjusted in the front-rear direction. A motorcycle equipped with a brake disc of a vehicle braking device of
The motorcycle according to claim 1, wherein the electromagnetic pickup is attached to the rear wheel position adjusting bracket.

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