Brake pad pin and axially constraining elastic element assembly and interaction method

A brake pad pin and axially constraining elastic element assembly, comprising:

• a brake pad supporting pin comprising a pin body that extends along a pin axis between a head end and a tip end,
• wherein said pin axis defines an axial direction, either coincident with or parallel to said pin axis, and a radial direction transverse to said axial direction,
• wherein said pin body comprises in succession along said axial direction towards said tip end at least one pin first portion having at least one pin first portion diameter,
• and a pin second portion having at least one pin second portion diameter;
• and wherein said brake pad pin and axially constraining elastic element assembly comprises:
• an elastic element arranged on said pin body at least at said pin first portion,
• wherein said elastic element has at least one elastic element inner diameter and at least one elastic element outer diameter,
• wherein said at least one elastic element outer diameter is either greater than or equal to said at least one pin second portion diameter,
• and wherein
• said pin body comprises a pin third portion arranged between said pin first portion and said pin second portion, wherein said pin third portion has at least one pin third portion stretch having at least one pin third portion diameter greater than said at least one elastic element inner diameter,
• wherein said elastic element comprises an elastic element inner profile facing towards said pin body,
• wherein said pin third portion comprises a pin third portion profile that connects said pin first portion and said pin second portion,
• wherein, when said pin third portion is biased towards said elastic element, or vice versa, said pin third portion profile is wedged at least partially into said elastic element inner profile so that said pin third portion stretch biases said elastic element at least in the radial direction outwards with a biasing force.

A brake caliper comprising at least one caliper body and at least one brake pad pin and axially constraining elastic element assembly comprising:

• a brake pad supporting pin comprising a pin body that extends along a pin axis between a head end and a tip end,
• wherein said pin axis defines an axial direction, either coincident with or parallel to said pin axis, and a radial direction transverse to said axial direction,
• wherein said pin body comprises in succession along said axial direction towards said tip end at least one pin first portion having at least one pin first portion diameter, and a pin second portion having at least one pin second portion diameter,
• and wherein said brake pad pin and axially constraining elastic element assembly comprises:
• an elastic element arranged on said pin body at least at said pin first portion,
• wherein said elastic element has at least one elastic element inner diameter and at least one elastic element outer diameter,
• wherein said at least one elastic element outer diameter is either greater than or equal to said at least one pin second portion diameter,
• and wherein
• said pin body comprises a pin third portion arranged between said pin first portion and said pin second portion, wherein said pin third portion has at least one pin third portion stretch having at least one pin third portion diameter greater than said at least one elastic element inner diameter,
• wherein said elastic element comprises an elastic element inner profile facing towards said pin body,
• wherein said pin third portion comprises a pin third portion profile that connects said pin first portion and said pin second portion,
• wherein, when said pin third portion is biased towards said elastic element, or vice versa, said pin third portion profile is wedged at least partially into said elastic element inner profile
• so that said pin third portion stretch biases said elastic element at least in the radial direction outwards with a biasing force,
• wherein said caliper body comprises a first elongated element and a second elongated element, wherein said first elongated element comprises at least one caliper body first housing and said second elongated element comprises at least one caliper body second housing, wherein said caliper body first housing and said caliper body second housing each have a housing axis parallel to and coincident with said pin axis, wherein said caliper body first housing comprises at least one first housing first portion, said caliper body first housing having prevalent longitudinal extension and having a caliper body first housing diameter, and said caliper body second housing having prevalent longitudinal extension and having a caliper body second housing diameter, wherein said pin second portion is at least partially housed in said caliper body first housing and said pin first portion is housed with clearance in said caliper body first housing, wherein said elastic element is housed in said first housing first portion, and
• wherein said at least one elastic element outer diameter is either greater than or equal to said first housing diameter to make an axial constraint opposing an extraction in the axial direction of said brake pad supporting pin from the caliper body.

An interaction method between a pad supporting pin and an elastic retaining element, the interaction method comprising:

• a) providing a brake pad pin and axially constraining elastic element assembly, comprising:
• a brake pad supporting pin comprising a pin body that extends along a pin axis between a head end and a tip end,
• wherein said pin axis defines an axial direction, either coincident with or parallel to said pin axis, and a radial direction transverse to said axial direction,
• wherein said pin body comprises in succession along said axial direction towards said tip end at least one pin first portion having at least one pin first portion diameter, and a pin second portion having at least one pin second portion diameter,
• and wherein said brake pad pin and axially constraining elastic element assembly comprises:
• an elastic element arranged on said pin body at least at said pin first portion,
• wherein said elastic element has at least one elastic element inner diameter and at least one elastic element outer diameter,
• wherein said at least one elastic element outer diameter is either greater than or equal to said at least one pin second portion diameter,
• and wherein
• said pin body comprises a pin third portion arranged between said pin first portion and said pin second portion, wherein said pin third portion has at least one pin third portion stretch having at least one pin third portion diameter greater than said at least one elastic element inner diameter,
• wherein said elastic element comprises an elastic element inner profile facing towards said pin body,
• wherein said pin third portion comprises a pin third portion profile that connects said pin first portion and said pin second portion,
• wherein, when said pin third portion is biased towards said elastic element, or vice versa, said pin third portion profile is wedged at least partially into said elastic element inner profile
• so that said pin third portion stretch biases said elastic element at least in the radial direction outwards with a biasing force,
• b) approaching said pin second portion to said elastic element, or vice versa, and
• c) during step b), wedging at least partially said pin third portion profile into said elastic element inner profile so that said pin third portion stretch biases said elastic element at least in the radial direction outwards with a biasing force.