Drum brake and braking member
AssigneeHitachi Astemo, Ltd.
InventorHideaki ISHII
Life of this patent
Estimating the term…
Abstract
A brake shoe brakes a drum rotor by being pressed against an inner peripheral surface of the drum rotor. A friction material of the brake shoe includes a first lining material, a second lining material, and a third lining material. The first lining material is one end portion of the friction material in an arc shape opposing the inner peripheral surface of the drum rotor in a rotation direction of the drum rotor. The second lining material is another end portion of the friction material in the rotation direction of the drum rotor. The third lining material is positioned between the one end portion and the another end portion in the rotation direction of the drum rotor, and is produced such that the third lining material wears earlier than the first lining material and the second lining material.
Claims13
A drum brake, comprising:
- a braking member configured to brake a drum rotor by being pressed against an inner peripheral surface of the drum rotor rotating together with a wheel, the braking member including:
- a first lining portion that is one end portion of a friction material in an arc shape opposing the inner peripheral surface of the drum rotor in a rotation direction of the drum rotor;
- a second lining portion that is another end portion of the friction material in the rotation direction of the drum rotor;
- and
- a third lining portion that is positioned between the one end portion and the another end portion in the rotation direction of the drum rotor, and is produced such that the third lining portion wears earlier than the first lining portion and the second lining portion;
- a back plate that is configured to support the braking member, and is fixed to a non-rotation portion of a vehicle;
- and
- an actuator unit configured to press the braking member against the inner peripheral surface of the drum rotor.
A braking member configured to brake a drum rotor by being pressed against an inner peripheral surface of the drum rotor rotating together with a wheel, the braking member comprising:
- a first lining portion that is one end portion of a friction material in an arc shape opposing the inner peripheral surface of the drum rotor in a rotation direction of the drum rotor;
- a second lining portion that is another end portion of the friction material in the rotation direction of the drum rotor;
- and
- a third lining portion that is positioned between the one end portion and the another end portion in the rotation direction of the drum rotor, and is produced such that the third lining portion wears earlier than the first lining portion and the second lining portion.
Dependencies are inferred from the claim text.