JPS6236985Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a ventilated rotor having ventilation holes extending radially through the sliding surface of the lining from the inner circumferential side to the outer circumferential side.

[Problems to be solved by conventional techniques and ideas]

Conventionally, this type of disc brake rotor was the first
As shown in the figure, the lining sliding surface 1 has ventilation holes 2 that penetrate radially from the inner circumferential side to the outer circumferential side,
As a result, the lining sliding surface 1 is forcedly cooled from the inside to prevent the temperature of the lining sliding surface 1 from rising. Note that 3 indicates a flange for attaching the rotor to the wheel.

As a result of various tests conducted by the present inventor regarding this disc brake rotor, it was found that the temperature of the outer circumferential portion a of the rotor was higher than that of the inner circumferential portion b (for example, a
It was observed that when the temperature at point b is 550℃, the temperature at point b becomes 450℃).

However, as the friction material becomes hotter, it wears out more, so if there is a large temperature difference between the inner and outer circumferences of the rotor as mentioned above, this means that there will be more wear on the outer circumference of the rotor. This results in problems such as increased pedal stroke and increased drag.

[Means for solving problems]

The present invention was developed to address these problems, and the lining sliding surfaces on both sides of the ventilated rotor are formed parallel to each other, and the wall thickness is changed symmetrically between the outer and inner peripheries. The wall thickness on the outer peripheral side is increased, that is, the heat capacity is increased.

That is, the lining sliding surfaces on both sides are made parallel to each other, and the thickness of the lining on both sides of the ventilation hole is the same and varies over the inner and outer circumferences to achieve the intended purpose.

That is, the gist of the present invention is to provide a ventilated rotor having ventilation holes penetrating the lining sliding surface radially from the inner circumferential side to the outer circumferential side, in which the lining sliding surfaces on both sides are formed parallel to each other, and The radial thickness of the lining sliding surface is changed symmetrically on both sides along the ventilation hole, and the thickness on the outer circumference side is made larger than that on the inner circumference side on both sides of the ventilation hole. This is found in disc brake rotors.

[Effect]

When changing the wall thickness of the inner and outer circumferences of the rotor, it is possible to change the wall thickness of the inner and outer circumferences only on one side of the rotor, but in this case, since the heat capacity of both sides is different, the friction pads on both sides will wear unevenly, which is not desirable. .

The present invention is characterized in that the thickness is equal on both sides of the rotor and varies across the inner and outer circumferences.

Moreover, in the ventilated rotor of this invention, the lining sliding surfaces on both sides are parallel to each other, and the outer and inner circumferential sides have different wall thicknesses to increase the heat capacity on the outer circumferential side. There is no significant temperature difference between the lining and the inner circumferential side, and there is no risk of uneven wear on the outer and inner circumferential sides of the lining.

〔Example〕

In FIG. 2, 1 is a lining sliding surface, 2 is a ventilation hole, and 3 is a flange, which are the same as in FIG. 1.

Lining sliding surfaces 1 on both sides along this ventilation hole
Let the wall thicknesses d and d' be d ₂ , d ₁ and d' ₂ , d' ₁ be the arbitrary outer and inner circumference thicknesses, respectively, then d ₂ >
d ₁ , d′ ₂ > d′ ₁ . In the embodiment, the thickness gradually increases from the inner circumferential side to the outer circumferential side.

[Effect of idea]

This reduces the temperature difference between the outer and inner peripheries of the lining sliding surfaces on both sides of the rotor.
Uneven wear on the pads can also be reduced.

In addition, in the present invention, the lining sliding surfaces on both sides are parallel to each other, and therefore the external thickness of the disc rotor is the same on the outer and inner periphery sides, so it is easy to process the lining sliding surfaces. Therefore, the lining of the pad can be easily molded.

Thus, the rotor of the present invention has great practicality, such as being able to prevent dragging and improving pedal feel.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional disc brake rotor, and FIG. 2 is a sectional view of a main part of an embodiment of the disc brake rotor of the present invention. 1... Lining sliding surface, 2... Ventilation hole, 3...
...Flange, d ₁ , d′ ₁ ...Inner peripheral wall thickness, d ₂ , d′ ₂
...The thickness of the outer periphery.

Claims (1)

[Scope of utility model registration request] In a ventilated rotor having ventilation holes that penetrate radially from the inner circumferential side to the outer circumferential side in the lining sliding surface, the lining sliding surfaces on both sides are formed parallel to each other, and the lining slides along the ventilation holes. A disc brake rotor characterized in that the wall thickness in the radial direction of the surface is changed symmetrically on both sides, and the wall thickness on the outer peripheral side is larger than that on the inner peripheral side on both sides of the ventilation hole.