Mechanical System, Injection Pump And Valve Actuator Comprising Such A Mechanical System And Manufacturing Method

An injection pump for a motor vehicle comprising:

• a mechanical system including:
• a support element having an outer surface adapted to slide in a housing receiving the mechanical system,
• a pin extending along a first axis and comprising two opposite ends, each adapted to be fitted in the support element for radial and/or axial retention of the pin relative to the first axis, and
• a roller element movable in rotation relative to the pin around the first axis,
• wherein the mechanical system comprises at least one outer insert positioned at the outer surface of the support element,
• wherein the mechanical system is a subassembly integrated into the injection pump.

A valve actuator for a motor vehicle comprising:

• a mechanical system including:
• a support element having an outer surface adapted to slide in a housing receiving the mechanical system,
• a pin extending along a first axis and comprising two opposite ends, each adapted to be fitted in the support element for radial and/or axial retention of the pin relative to the first axis, and
• a roller element movable in rotation relative to the pin around the first axis,
• wherein the mechanical system comprises at least one outer insert positioned at the outer surface of the support element,
• wherein the mechanical system is a subassembly integrated into the valve actuator.

A method for manufacturing a mechanical system comprising steps of:

• obtaining components of the mechanical system, the components including:
• a support element having an outer surface adapted to slide in a housing receiving the mechanical system,
• a pin extending along a first axis and comprising two opposite ends, each adapted to be fitted in the support element for at least one of radial retention and axial retention of the pin relative to the first axis, and
• a roller element,
• wherein the mechanical system comprises at least one outer insert positioned at the outer surface of the support element;
• assembling the roller element to be movable in rotation relative to the pin around the first axis, and
• assembling the support element onto the outer insert by one of:
• overmolding the support element onto the outer insert or
• snapping the outer insert in a groove formed in the support element.