US 5,706,915 AGranted

Brake disc rotor

AssigneesKabushiki Kaisha Toyota Chuo Kenkyusho, Toyota Jidosha Kabushiki Kaisha

InventorsTakashi Shimazu, Haruo Katagiri, Shigeru Sakamoto, Hidetoshi Shimizu

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Abstract

A brake disc rotor includes: a pair of disc-shaped sliding plates provided in parallel with and separately from each other in the axle direction; a plurality of partition walls radially provided between the sliding plates; a plurality of passages radially formed between the plurality of partition walls; a plurality of inlet and outlet openings communicating with the plurality of passages and opening inward and in the radially outward direction; and an inclined portion formed on the surface of the inside sliding plate opposed to the outside sliding plate such that a distance between the inside and outside sliding plates is gradually decreased in the radially outward direction.

Claims23

Dependent claims

A brake disc rotor comprising:

a pair of opposed inside and outside disc-shaped sliding plates provided axially inside and outside on said brake disc rotor, said inside and outside sliding plates each having inside and outside annular flat surfaces, said inside flat surfaces facing one another and being separated from each other in an axial direction;
a plurality of partition walls radially provided between said inside and outside sliding plates;
a plurality of passages radially formed between said plurality of partition walls and between opposed said inside annular flat surfaces of said inside and outside sliding plates and at right angles with respect to the axial direction thereof;
a plurality of inlet and outlet openings communicating with said plurality of passages and opening inward and outward in a radial direction of said sliding plates;
said inside and outside surfaces of said outside sliding plate having said annular flat surfaces formed entirely in parallel such that said outside sliding plate has a constant thickness as a whole;
and
an inclined portion formed on a radial inner part of said inside annular flat surface of said inside sliding plate opposed to said outside sliding plate such that a distance between said inside annular flat surfaces of said inside and outside sliding plates is gradually decreased in a radial outward direction at a radial inner part of said passage, so as to enlarge the cross-sectional area at said radial inner part of said passage and reduce a flow separation caused by change of flow directions of the inflow at a radial inner end of said passage,
thereby decreasing inflow resistances of an inflow flowing into the radial inner part of said passage through said inlet opening;
and increasing a flow rate and a mean airflow velocity to improve the cooling capacity of the rotor.

6 more elements

A brake disc rotor comprising:

a pair of opposed inside and outside disc-shaped sliding plates provided axially inside and outside on said brake disc rotor, said inside and outside sliding plates each having inside and outside annular flat surfaces, said inside flat surfaces facing one another and being separated from each other in an axial direction;
a plurality of partition walls radially provided between said inside and outside sliding plates;
a plurality of passages radially formed between said plurality of partition walls and between opposed said inside annular flat surfaces of said inside and outside sliding plates and at right angles with respect to the axial direction thereof;
a plurality of inlet and outlet openings communicating with said plurality of passages and opening inward and outward in a radial direction of said sliding plates;
a taper portion having a straight inclined wall formed on at least a radial inner part of said inside annular flat surface on said inside sliding plate,
a taper portion having a straight inclined wall formed on at least a radial inner part of said inside annular flat surface on said outside sliding plate,
wherein a distance between said taper portions of said inside and outside sliding plates is gradually decreased in a radial outward direction at a radial inner part of said passage, so as to enlarge the cross sectional area at said radial inner part of said passage and reduce a flow separation caused by change of flow directions of the inflow at a radial inner end of said passage, thereby decreasing inflow resistance of an inflow flowing into the radial inner part of said passage through said inlet opening, and increasing a flow rate and a mean airflow velocity to improve the cooling capacity of the rotor, and a distance between radial outer parts of said inside annular flat surfaces of said inside and outside sliding plates is approximately constant in the radial direction thereof;
and
said inlet openings formed at right angles with respect to the axial direction of said sliding plates.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/715,491Filed 18 Sep 1996 · continuation
Priority: JP 6-2422128 Sep 1994
Granted: 13 Jan 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16D 55/22
With axially-movable discs or pads pressed against axially-located rotating members: by clamping an axially-located rotating disc between movable…
F16D 65/128
Discs; Drums for disc brakes: characterised by means for cooling
F16D 2055/0037
Parts or details of disc brakes: protective covers
F16D
Couplings for transmitting rotation

Family

Serial523,964Parent of this continuation · filed 6 Sep 1995
US 5,706,915 AThis patent

From the US filing history. Foreign family members aren’t listed.

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