JPH017871Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a disc brake plate used for motorcycles, automobiles, etc.

Disc brakes apply braking by squeezing the braking part around the outer periphery of a metal disc with calipers from both sides. Therefore, when braking is applied continuously, the brake part may heat up due to friction with the caliper, causing thermal expansion of the brake part, but the temperature increase on the mounting part side is smaller than that of the brake part, and the entire disc is heated. A difference occurs in the temperature distribution. Therefore, when the brake part thermally expands, stress becomes unbalanced, causing deformation such as tilting of the brake part in its thickness direction. When such a deformation occurs in the brake part, the contact area of the caliper with the brake part becomes smaller, and the movement of the caliper widens the opening of the caliper, which may make it difficult to apply the brake. When the degree of deformation increases, the intermediate portion may undergo plastic deformation, causing a problem in which braking is not sufficiently applied.

The present invention aims to reduce the deformation of the brake part when the brake part of the disc undergoes thermal expansion, thereby making it difficult to apply the brake and preventing plastic deformation from occurring in the intermediate part.

As shown in the drawings, the disc brake plate of the present invention has an intermediate part 6 formed between a braking part 2 on the outer periphery of a metal disc-shaped main body 1 and a mounting part 4 on the center side, in the circumferential direction. It is characterized in that holes 7 are provided at intervals, and the intermediate portion 6 of the holes 7, 7 is curved in the radial direction of the main body 1.

This main body 1 is used by being attached to a two-wheeled vehicle in the same way as a known disc brake plate, and its braking portion 2 is held between both sides by calipers to apply braking. The inner intermediate part 6 of the brake part 2 is divided by the hole 7 in the circumferential direction and is curved in the radial direction of the main body 1, so that it can be elastically deformed in the radial direction of the main body 1. be. Therefore, when the brake part 2 is heated by friction and expands and extends in the radial direction of the main body 1, the intermediate part 6 is simultaneously expanded in the radial direction, and the stress of the entire brake part 2 is approximately equalized. This prevents the braking portion 2 from being deformed to a state where it is inclined in its thickness direction due to strain.

An embodiment of the disc brake plate of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a metal disc-shaped main body, and a portion of an appropriate width in the radial direction of the entire outer circumference of the main body serves as a braking portion 2. 3 is a shaft hole provided in the center of the main body 1, and 4 is a mounting portion provided on the outer periphery of the shaft hole 3, in which a suitable number of mounting holes 5 are provided. Reference numeral 6 denotes an intermediate portion formed between the braking portion 2 and the mounting portion 4, in which holes 7 are provided at intervals in the circumferential direction, and the intermediate portion 6 between the holes 7 and 7 is formed in the radial direction of the main body 1. I'm making it bend. Although the protruding directions due to the curve of the intermediate portion 6 are alternately reversed,
It is optional, such as setting it only in the same direction. The main body 1 is
The whole may be linear as shown in FIG. 2, or the braking portion 2 and the mounting portion 4 may be stepped in the thickness direction as shown in FIG. 3.

The use of this plate is the same as that of the known one,
A shaft of a two-wheeled vehicle or the like is inserted into the shaft hole 3, and the main body 1 is fixed to the vehicle body of the two-wheeled vehicle or the like through the mounting hole 5. The brake part 2 is held between both sides by calipers to apply braking, and the intermediate part 6 formed on the inner peripheral part of the brake part 2 is divided into a plurality of parts by holes 7 in the circumferential direction, and the main body Since the intermediate portion 6 is curved in the radial direction of the main body 1, the intermediate portion 6 can be elastically deformed and expanded in the radial direction of the main body 1 by changing its curved state.

Therefore, when the brake part 2 is heated by friction with the caliper that clamps it, expands, and expands in the radial direction, the intermediate part 6 of the inner peripheral part also expands due to elastic deformation. Therefore, when the brake part 2 thermally expands, the stress is almost uniform throughout the brake part 2, and the brake part 2 only expands in the radial direction, and due to strain, the brake part 2 expands in the thickness direction. Since it is possible to prevent the braking part 2 from deforming into a tilted state, it is not only difficult to apply the brake due to thermal deformation of the braking part 2, but also the braking part 2 is deformed and plastically deformed.
This can solve the problem of brakes becoming difficult to apply.

As in this embodiment, if the directions of protrusion due to the curvature of the intermediate portions 6 separated by the holes 7 are alternately reversed, the stress during expansion and contraction due to elastic deformation of the intermediate portions 6 is approximately equal in the thickness direction. Therefore, it is more suitable for preventing deformation of the brake part 2. middle part 6
Even if the hole 7 in is made large enough to span the entire width of the middle part 6, it can be made arbitrarily large, such as making it slightly smaller than the width of the middle part 6, as shown in FIG. 1, so that the elastic deformation of the middle part 6 is If possible, it is sufficient if the stress distribution when the braking part 2 thermally expands can be made almost uniform.

As described above, the plate of the present invention allows the main body 1 to expand and contract due to elastic deformation in the radial direction by bending the intermediate portion 6 of the inner circumference of the braking portion 2 in the radial direction. Therefore, when the brake part 2 thermally expands, the intermediate part 6 expands at the same time, so that the stress distribution in the brake part 2 can be made almost uniform over the entire part.
There is no risk that the braking part 2 will undergo thermal expansion and be elastically deformed in the thickness direction, or that the accuracy of the braking part will deteriorate due to thermal deformation, and the braking part 2 can always maintain a state in which the brake can be reliably applied. Is possible.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a front view, and FIGS. 2 and 3 are sectional views of different embodiments. 1: Main body, 2: Braking section, 4: Mounting section, 6: Intermediate section, 7: Hole.

Claims (1)

[Claims for Utility Model Registration] (1) Holes are provided at intervals in the circumferential direction of a metal disk-shaped main body in an intermediate portion between a braking portion on the outer periphery and a mounting portion on the center side. , a disc brake plate in which an intermediate portion between the holes is curved in the radial direction of the main body; (2) The disc brake plate according to claim 1, wherein intermediate portions between the holes alternately curve and protrude in opposite directions.