Mounting structure for cone brake

A brake assembly comprising:

• a shaft received in a housing for rotation about an axis;
• a brake drum fixed to rotate with said shaft, said brake drum having a friction surface;
• a brake shoe mounted for limited axial movement relative to said shaft and said brake drum, said brake shoe having a friction surface which is selectably engaged with said friction surface on said brake drum to prevent rotation of said shaft;
• a lever having a cam face in contact with a cam face on said brake shoe, said lever being rotatable to move said brake shoe from a removed non-braking position where said friction surface of said brake drum is not contacted by said friction surface of said brake shoe, to an engaged braking position at which said friction surface of said brake drum does engage said friction surface of said brake shoe;
• said cam face on said brake shoe including a plurality of circumferentially spaced stop points at a first axial position relative to said axis, and a plurality of circumferentially spaced brake points, said brake points being spaced between adjacent stop points such that stop points are disposed on either circumferential side of each said brake point, ramped surfaces being formed intermediate each of said brake points and said stop points, each of said ramped surfaces including a stop end adjacent said stop point at a second axial position, said stop end being the portion of said brake shoe cam face most removed from said lever, flat surfaces extending from said first axial position to said second axial position and connecting said stop points and said stop ends, said ramped surfaces extending from said stop end circumferentially in a direction towards said brake point, and axially towards said lever, such that an opposed end of said ramped surface merges into an adjacent one of said brake points;
• and
• said lever cam face including a plurality of brake points, and a ramped surface on one circumferential side of each said lever brake point, a stop face formed on a second circumferential side of each said lever brake point, each said stop face abutting one of said flat surfaces when said brake shoe is in the removed position, and said ramped surface of said lever being movable along said ramped surface of said brake shoe when said lever is rotated, such that said lever brake point approaches the circumferential position of said brake shoe brake point to cause said brake shoe to move towards said brake drum.

A brake assembly comprising:

• a shaft received in a housing for rotation about an axis;
• a brake drum fixed to rotate with said shaft, said brake drum having a conically-tapered inner peripheral friction surface;
• a brake shoe mounted for limited axial movement relative to said shaft and said brake drum, said brake shoe having a conically-tapered outer peripheral friction surface which is selectably engaged with said friction surface on said brake drum to prevent rotation of said shaft;
• a lever having a cam face in contact with a cam face on said brake shoe, said lever being rotatable to move said brake shoe from a removed non-braking position where said friction surface of said brake drum is not contacted by said friction surface of said brake shoe, to an engaged braking position at which said friction surface of said brake drum does engage said friction surface of said brake shoe;
• and
• said brake drum having a tubular sleeve at a position radially inwardly from said inner peripheral surface, said brake shoe being slidably received on said sleeve, said lever being rotatably received on said sleeve and rotatable about said axis, and a spring being positioned between said brake drum and abutting a face of said brake shoe to bias said brake shoe away from said brake drum into contact with said lever, said lever being adapted to cause said brake shoe to overcome the biased force of said spring and move towards said brake drum.