Brake assembly with brake shoe and brake lining plate, and associated method

A brake assembly of the type having a brake shoe with a generally cylindrically curved platform and one or more brake plates mounted on the platform, both the platform and the brake plate or plates having generally cylindrically curved front and rear edges, the brake plate or plates each including a brake lining and a backing plate, with the backing plate having an outer surface secured to the lining and having an inner surface attachable to an outer surface of the brake shoe platform, wherein:

• said brake shoe platform has a series of first bolt-receiving bores adjacent the rear edge thereof and a series of second bolt receiving bores adjacent the front edge thereof, said brake shoe platform also having a series of apertures each associated with one of said first bolt-receiving bores and each spaced inwardly of one of said first bolt-receiving bores, and having has a series of recesses communicating with said front edge of the platform and each situated adjacent one of said second bolt-receiving bores,
• and in that each said backing plate has:
• a) two rear flanges adjacent said rear edge thereof, each rear flange being L-shaped and having an inner portion depending from the inner surface of said backing plate and a rearwardly projecting outer tongue portion generally parallel to an adjacent rear portion of the backing plate, both of said outer tongue portions being sized to pass through respective ones of said apertures in the brake shoe platform;
• and
• b) two front flanges adjacent the front edge thereof, each front flange having an inner portion depending from the inner surface of the backing plate and sized to fit into one of said recesses communicating with the front edge of the platform, and an outer tongue portion generally parallel to an adjacent front edge area of the backing plate;
• wherein said outer tongue portions of both the rear and front flanges have screw threaded bores adapted to receive bolts inserted through said bolt receiving bores in the brake shoe platform,
• whereby said brake plate can be assembled to the shoe by passing said rear flanges through the said apertures in the brake shoe platform and locating said rear flange outer tongue portions under portions of the platform adjacent said rear edge, while also sliding said front flange inner portions into said recesses and locating said front flange outer tongue portions on the underside of the portions of the brake shoe platform adjacent said front edge, and securing all the flanges to the brake shoe platform by means of screws passed through the bores in the brake shoe platform and into said screw threaded bores in the flange outer tongue portions.

A method for adapting a brake shoe of the type having a brake shoe platform to receive brake plates of the type having a brake lining and a backing plate, the backing plate having a rear edge and a front edge:

• a) at least two rear flanges adjacent said rear edge thereof, each rear flange being L-shaped and having an inner portion depending from an inner surface of said backing plate and a rearwardly projecting outer tongue portion generally parallel to an adjacent area of the backing plate, and
• b) at least two front flanges adjacent said front edge thereof, each front flange having an inner portion depending from the inner surface of the backing plate and an outer tongue portion projecting generally parallel to an adjacent area of the backing plate;
• said method comprising the steps of:
• 1) forming a series of circumferentially spaced apertures each adjacent to and spaced inwardly of said rear edge of the platform, each said aperture being sized to receive one of said rear flanges, and
• 2) forming a series of circumferentially spaced recesses each communicating with the front edge of the brake shoe, each said recess being sized to receive an inner outer tongue portion of one of said front flanges.

A brake assembly of the type having a brake shoe with a generally cylindrically curved platform, and a pair of brake plates mounted on the platform, both the platform and the brake plates having generally cylindrically curved front and rear edges, the brake plates each including a brake lining and a backing plate, with the backing plate having an outer surface secured to the lining and having an inner surface attachable to an outer surface of the brake shoe platform, wherein:

• said brake shoe platform has a circumferentially spaced series of three apertures each adjacent to and spaced inwardly of said rear edge of said platform, said three apertures including two outer end apertures adjacent outer ends of said platform and a central aperture which is wider than said outer end apertures, and also has a series of circumferentially spaced recesses communicating with said front edge of said platform,
• said platform also having two axially extending abutments adjacent the outer ends of the platform and positioned to lie adjacent outer side edges of the said pair of brake plates when in position on said platform,
• and in that each said backing plate has:
• a) two rear flanges adjacent said rear edge thereof, each rear flange being L-shaped and having an inner portion depending from the inner surface of said backing plate and a rearwardly projecting outer tongue portion generally parallel to an adjacent area of the backing plate, said pair of backing plates having a closely spaced pair of said rear flanges sized to pass through said wider, central aperture and having an end pair of said rear flanges being sized to pass through said outer apertures in the brake shoe platform;
• and
• b) two front flanges adjacent the front edge thereof, each front flange having an inner portion depending from the inner surface of the backing plate and an outer tongue portion projecting generally parallel to an adjacent area of the backing plate;
• whereby said pair of brake plates can be assembled to the brake shoe platform by passing said rear flanges through the said apertures in the brake shoe platform and sliding said brake plates rearwardly until said rear flange outer tongue portions underlie portions of the platform adjacent the rear edge while said front flange inner portions enter said recesses and the front flange outer tongue portions slide under portions of the brake shoe platform adjacent the front edge.

A brake assembly of the type having a brake shoe with a generally cylindrically curved platform, and at least one brake plate mounted on the platform, both the platform and the brake plate having generally cylindrically curved front and rear edges, the brake plate including a brake lining and a backing plate, with the backing plate having an outer surface secured to the lining and having an inner surface attachable to an outer surface of the brake shoe platform, wherein:

• said brake shoe platform has a circumferentially spaced series of apertures each adjacent to and spaced inwardly of said rear edge of said platform, and has a series of bolt receiving bores each adjacent a rear edge of one of said apertures,
• and in that said backing plate has two rear flanges adjacent said rear edge thereof, each rear flange being L-shaped and having an inner portion depending from the inner surface of said backing plate and a rearwardly projecting outer tongue portion generally parallel to an adjacent area of the backing plate and connected to the inner portion by a curved junction portion, said rear flanges being sized to pass through said apertures in the brake shoe platform, said outer tongue portions of said rear flanges having screw threaded bores adapted to receive bolts inserted through said bolt receiving bores in the brake shoe platform;
• whereby said pair of brake plate can be assembled to the brake shoe platform by passing said rear flanges through the said apertures in the brake shoe platform and sliding said brake plate rearwardly until said rear flange outer tongue portions underlie respective portions of the platform adjacent the rear edge and said curved junction portions engage respective juxtaposed edges of the associated apertures to form respective pivots, and securing said rear flanges to said platform by means of screws passed through the bores in the flange outer tongue portions, the arrangement being such that tightening of the screws to draw the rear flange outer tongue portions towards said portions of the platform adjacent the rear edge urges the frontal portion of the brake plate towards the frontal portion of the platform with sufficient force to hold the brake plate without additional front connectors.