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, wherein the mechanical system includes:
• a tappet including a body,
• a support element defining two bores centered on a first axis,
• a pin comprising two opposite ends each adapted to be fitted in one of the two bores, and
• a roller element positioned between the two bores along the first axis and movable in rotation relative to the pin around the first axis,
• wherein the support element is distinct from the body and fixed thereto,
• wherein the support element also comprises at least one antirotation device integrally formed thereto,
• wherein the mechanical system is a subassembly integrated into the injection pump.

A valve actuator for a motor vehicle comprising:

• a mechanical system, wherein the mechanical system includes:
• a tappet including a body,
• a support element defining two bores centered on a first axis,
• a pin comprising two opposite ends each adapted to be fitted in one of the two bores, and
• a roller element positioned between the two bores along the first axis and movable in rotation relative to the pin around the first axis,
• wherein the support element is distinct from the body and fixed thereto,
• wherein the support element also comprises at least one antirotation device integrally formed thereto,
• 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 tappet including a body,
• a support element defining two bores centered on a first axis,
• a pin comprising two opposite ends each adapted to be fitted in one of the two bores, and
• a roller element,
• wherein the support element is distinct from the body and fixed thereto,
• wherein the support element also comprises at least one antirotation device integrally formed thereto;
• assembling the roller element to be movable in rotation relative to the pin around the first axis;
• and
• wherein the antirotation device is integrally formed with the support element by stamping, then the support element is fixed to the body by at least one of:
• clamping, crimping, welding and soldering.