Haldex Brake Products Ab

Haldex Ab

Ake Nelander

Lars Severinsson

Joakim Gripemark

Anders Ortegren

Kjell Onnestam

Hakan P O Larsson

The present invention concerns a modular disc brake, preferably for a heavy road vehicle. The modular disc brake comprises a frame, a house and a cover. A brake mechanism forming a single pre-mounted unit is received in the house. The modules are held together by means of pull rods and nuts. The house is received in a recess of the frame. The cover covers the end of the house. The frame is of a floating type having openings to receive sliding pins.

Modular disc brake

The brake mechanism for a disc brake is received in a caliper by means of pivots. The brake mechanism comprises a lever, a cross bar, a thrust yoke and an adjuster mechanism. The thrust yoke is provided with braces going diagonally from the center of the thrust yoke down to the backside of the thrust plate. The structure of the thrust yoke ensures that the force is applied in distinct, separated areas of the brake pads. The brake mechanism is held together as one unit which facilitates handling and assembly.

Brake mechanism

Control arm arrangement for a brake lever

A brake lever for an S-cam brake has a worm wheel (3) engaging the S-cam shaft and a worm screw (4) meshing therewith. A clutch wheel (6) on the worm screw forms a clutch (8) therewith under the bias of a compression spring (9). A control movement is transmitted from an external reference point to the clutch wheel via a pinion (15), a carrier wheel (16) and a control screw (18), the common axis of these three parts being perpendicular to the worm screw, wherein the control screw meshes with the clutch wheel. The carrier wheel can be turned relative to the pinion an angular distance corresponding to the desired slack and is biassed to one end position by a torsion spring (17), which is also used to engage a one-way clutch (19) between the carrier wheel and the control screw.

Brake lever for an S-cam automotive drum brake

Growing community of inventors

Bunkeflostrand, Sweden

Ake Nelander