JP2004108557A - Disk brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of light weight and high support stiffness, and easy to secure reliability. <P>SOLUTION: A component part of a suspension device such as a front fork 9a and a caliper 2a is joined and fixed by stays 17a, 17b integrated with the both members 9a, 2a. A bolt, fastening work of the same, and locking work which are required in a case that the front fork and the caliper are separated become unnecessary. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement of a disc brake used for braking a vehicle such as a motorcycle, and realizes a lightweight and sufficient rigidity and a highly reliable structure.
[0002]
[Prior art]
2. Description of the Related Art Disc brakes used for braking a vehicle such as a motorcycle are disclosed in Japanese Patent Application Laid-Open No. 2000-18291 and Japanese Patent Application Laid-Open No. 2001-271857. . 6 and 7 show a disc brake described in Patent Document 2 of these.
[0003]
The disc brake includes a caliper 2 provided across a rotor 1 that rotates with wheels. Cylinder holes 5, 5 are formed in the opposing portions of the outer body 3 and the inner body 4 constituting the caliper 2, respectively, and pistons 6, 6 are fitted in the respective cylinder holes 5, 5 in an oil-tight manner. I am wearing it. At the time of braking, a pair of pads 7, 7 provided so as to sandwich the rotor 1 from both sides in the axial direction are pressed against both side surfaces of the rotor 1 by the pistons 6, 6, respectively. The pads 7 are supported by the caliper 2 by guide pins 8 extending between the bodies 3 so that the rotor 1 can be freely displaced in the axial direction. I have.
[0004]
The caliper 2 is supported and fixed to a front fork 9 which is a component of a suspension system for a motorcycle. For this reason, in the case of the conventional structure shown in FIGS. 6 and 7, a mounting bracket 19 is fixed to the front fork 9. On the other hand, through holes 10 and 10 are formed at both ends of the caliper 2 in the rotation direction of the rotor 1. The bolts 11, 11 inserted through the through holes 10, from the radial outside of the rotor 1, are screwed into the screw holes 12, 12 formed in the mounting bracket 19, and further tightened. It is connected and fixed to the front fork 9.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-18291 [Patent Document 2]
JP 2001-271857 A
[Problems to be solved by the invention]
In the case of the conventional structure as described above, since the caliper 2 and the front fork 9 which are separated from each other are fixedly connected by a pair of bolts 11, 11, it is difficult to reduce the weight, and it is troublesome to secure reliability. . That is, in order to secure a sufficient bonding strength, the bolts 11 need to be made of a heavy material such as high-tensile steel, and the weight increases accordingly. Further, in order to secure the reliability of the connecting and fixing portion by the bolts 11, 11, it is necessary to tighten the bolts 11, 11 and then to provide some kind of locking to the front fork 9. The work of fixing and fixing is complicated.
The disc brake of the present invention has been invented in view of such circumstances.
[0007]
[Means for Solving the Problems]
The disc brake of the present invention includes a caliper provided across a rotor that rotates with the wheels, similarly to the above-described conventionally known disc brake.
The caliper is connected and fixed to a part of a component of the suspension device.
In particular, in the case of the disc brake of the present invention, the components of the suspension and the caliper are integrally formed.
[0008]
[Action]
In the case of the disk brake of the present invention configured as described above, the bolt for connecting and fixing the caliper to the components of the suspension, which is required in the above-described conventional structure, is not required. Further, since the bolt is not required, it is not necessary to consider the locking of the bolt. As a result, the weight and reliability can be easily ensured, and the cost can be reduced.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 5 show an example of an embodiment of the present invention. The disc brake of the present embodiment is of an opposed piston type similarly to the above-described conventionally known disc brake, and includes a caliper 2a provided across the rotor 1 (FIG. 5) that rotates together with the wheels 18. In the case of this example, the caliper 2a is made of an aluminum alloy, and is formed by connecting the outer-diameter-side ends of the outer body 3a and the inner body 4a to each other by a connecting portion 13. A part of the rotor 1 can freely enter into a concave portion 14 surrounded on three sides by the two bodies 3a, 4a and the connecting portion 13. At the time of braking, the pads 7a, 7a supported by the two bodies 3a, 4a by the pistons 6, 6 (see FIG. 7) fitted into the cylinder holes 5, 5 provided in the both bodies 3a, 4a are attached to the rotor 1 To both sides.
[0010]
In particular, in the case of the disc brake of this embodiment, the caliper 2a and the front bracket 16 connected to the lower end of the front fork 9a are integrally formed of a light alloy such as an aluminum alloy or a magnesium alloy. . That is, in the motorcycle, a front bracket 16 having a holding portion 15 for supporting the axle of the front wheel is fixed to the lower end of the front fork 9a. In the case of this example, the side surface of the front bracket 16 (the rear surface in the traveling direction in the assembled state) and the outer body 3a constituting the caliper 2a are connected and fixed by a pair of upper and lower stays 17a, 17b. . In the case of this example, at least the front bracket 16, the outer body 3a, and the stays 17a and 17b are integrally formed of an aluminum alloy. The method of integrally forming these parts 16, 3a, 17a, 17b may be shaving or die casting.
[0011]
The front bracket 16 is provided at the lower end of the front fork 9a. A separate body is fixed to the front fork 9a later. Further, the inner body 4a may be integral with the outer body 3a or may be separate from the outer body 3a. Whether these two bodies 3a, 4a are integrated or separate is determined in consideration of manufacturing cost including assemblability, required strength, rigidity and the like.
[0012]
When assembling the disk brake of the present embodiment configured as described above to a vehicle, as shown in FIG. 5, the front bracket 16 is connected and fixed to the lower end of the front fork 9a. The wheel 18 and the rotor 1 are rotatably supported on the lower end of the front fork 9a by an axle 20 inserted through the front bracket 16.
[0013]
In the case of the disk brake according to the present invention, which is configured as described above and assembled as described above, the disk brake is fixed to the front fork 9 which is necessary for the conventional structure shown in FIGS. The bolts 11 for connecting and fixing the caliper 2 to the mounting bracket 19 become unnecessary. Further, since the bolts 11 and 11 are not required, it is not necessary to consider preventing the bolts 11 and 11 from loosening. As a result, it is easy to reduce the weight and ensure reliability. That is, since the heavy bolts 11 made of high-tensile steel become unnecessary, the weight can be reduced, and at the same time, the tightening work and the loosening prevention work of these bolts 11 become unnecessary. Also, since the front fork 9a and the caliper 2a are connected by stays 17a, 17b integral with the two members 9a, 2a, the rigidity of the caliper 2a supporting the front fork 9a is improved. When the support rigidity is improved, the rising characteristics of the braking force at the time of braking are improved, which leads to an improvement in the operational feeling received by the driver.
[0014]
【The invention's effect】
Since the present invention is constructed and operates as described above, it is possible to realize a lightweight, highly rigid and highly reliable disc brake at low cost.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example of an embodiment of the present invention viewed from a radially inner side of a rotor on an outer side in a state of being coupled to a front fork.
FIG. 2 is a perspective view of the inner side viewed from the radial inside of the rotor.
FIG. 3 is a perspective view of the outer side as viewed from the outside in the radial direction.
FIG. 4 is a side view showing only an integrally formed part and viewed from an outer side.
FIG. 5 is a perspective view showing an assembled state to a vehicle.
FIG. 6 is a partial vertical sectional side view showing one example of a conventional structure.
FIG. 7 is a sectional view taken along the line AA of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotor 2, 2a Caliper 3, 3a Outer body 4, 4a Inner body 5 Cylinder hole 6 Piston 7, 7a Pad 8 Guide pin 9, 9a Front fork 10 Through hole 11 Bolt 12 Screw hole 13 Connecting part 14 Recess 15 Holding part 16 Front bracket 17a, 17b Stay 18 Wheel 19 Mounting bracket 20 Axle

Claims (1)

In a disc brake provided with a caliper fixed across a part of a suspension component provided over a rotor that rotates with wheels, the components of the suspension and the caliper are integrally formed. And disc brake.

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