Disc brake caliper
AssigneeHaldex AB
InventorLars Severinsson
Life of this patent
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Abstract
A disc brake caliper comprises a housing (1) to be arranged to straddle a vehicule brake disc, a cover (2) attached to the housing, two thrust sleeves (8), which are connected to a brake pad (5) and which are axially movable in the housing, a cross bar (9) connecting the two thrust sleeves, and a lever (17) for transmitting a brake force from a brake cylinder (4), attached to the caliper, to a cross bar. Bearing tappets (20), parallel with the cross bar, are fixedly connected to the inside of the cover. The lever has a curved wedge (19) with two cylindrical surfaces (19', 19") in engagement with corresponding cylindrical surfaces of the bearing tappets and the cross bar, respectively. An adjuster mechanism (28) is arranged on a splined shaft (29) rotatably journalled in the bearing tappets.
Claims12
An interconnected disc brake caliper assembly ready for attachment to a brake cylinder (4), comprising in combination:
- a housing for straddling a vehicle brake disc, a cover (2) attached to the housing substantially parallel to the brake disc which further comprises two thrust sleeves (8), which are connectable to a brake pad holder (6) provided with a brake pad (5) for braking engagement with the brake disc and which sleeves are axially movable and arranged on the cover for disposal in the housing at a distance from each other, a cross bar (9) encompassing the two thrust sleeves, and a lever (17) for transmitting a brake force from a brake cylinder (4) to said crossbar, bearing tappets (20) arranged parallel with the cross bar (9) fixedly connected to the inside of the cover (2) and wherein the lever (17) comprises an arm (18) for actuation by the brake cylinder (4) and a curved wedge (19) having an inner cylindrical surface (19') in engagement with outer cylindrical surfaces of the bearing tappets and an outer cylindrical surface (19") with greater radius than the inner cylindrical surface in engagement with an inwardly directed cylindrical surface in the cross bar.
A disc brake caliper, comprising a housing (1) to be arranged astraddle of a vehicle brake disc, a cover (2) connected to the housing, two thrust sleeves (8) which are connected to a brake pad holder (6) provided with a brake pad (5) for braking engagement with the brake disc, said pad holder and brake pad being axially movable in the housing at a distance from each other, a cross bar (9) connecting the two thrust sleeves, and a lever (17) for transmitting a brake force to the cross bar from a brake cylinder (4) when attached to the caliper, characterized in that bearing tappets (20) arranged parallel with the cross bar (9) are fixedly connected to the inside of the cover (2) and in that the lever (17) comprises an arm (18) for actuation by the brake cylinder (4) and a curved wedge (19) having an inner cylindrical surface (19') in engagement with outer cylindrical surfaces of the bearing tappets and an outer cylindrical surface (19") with greater radius than the inner cylindrical surface in engagement with an inner cylindrical surface in the cross bar, wherein an adjuster mechanism (28) comprises an adjuster housing (33), an adjustment spring (35) with its outer periphery in engagement with an inner surface of the adjuster housing, a driving ring (38) connected to the adjustment spring by means of a radial extension (35') thereof in a driving ring recess (38'), an adjuster hub (39) connected to the splined shaft (29) by means of inner splines, and a one-way spring (37) connected to the driving ring by means of a radial extension and arranged on coaxial cylindrical surfaces of the driving ring and the adjuster hub.
A disc brake caliper, comprising in combination, a housing (1) to be attached to a vehicle brake disc assembly, a cover (2) for said housing adapted to contact a brake pad holder (6) provided with a brake pad (5) for braking engagement with the brake disc, said pad holder and brake pad being axially movable in the housing during braking strokes, a cross bar (9) axially movable with said pad holder and brake pad carrying two thrust sleeves, a rotatable lever (17) for transmitting a brake force to the cross bar from a brake cylinder (4), bearing tappets (20) fixedly connected to the inside of the cover (2) having outer cylindrical surfaces for supporting the rotation of said lever (17), a curved wedge (19) carried by the lever for axially moving the cross bar in a braking operation, said lever (17) further having an inner cylindrical surface (19') in engagement with outer cylindrical surfaces of the bearing tappets and an outer cylindrical surface (19") with greater radius than the inner cylindrical surface in engagement with a mating cylindrical surface of the cross bar, and needle bearings affixed adjacent to the respective inner and outer cylindrical surfaces of the lever (17) to reduce friction between the inner and outer cylindrical surfaces of the lever (17) and the respective tappets (20) and the cylindrical surface of the cross bar.
Dependencies are inferred from the claim text.