초록 ▼

Conventional tappet retainer assemblies for a fuel injection pump typically include a blind radial passage formed in a tappet. Only one opening in the passage is available for inserting and removing a ball bearing or spring and stop pin which must be held in place before the tappet is inserted in a

Conventional tappet retainer assemblies for a fuel injection pump typically include a blind radial passage formed in a tappet. Only one opening in the passage is available for inserting and removing a ball bearing or spring and stop pin which must be held in place before the tappet is inserted in a housing bore. In such an arrangement, the ball bearing or compressed spring and stop pin are prone to pop or fall out before the passage opening is closed by an internal wall of the housing bore. The present invention provides an improved tappet retainer assembly which includes a housing, a tappet, a stop device, and a biasing device. The tappet includes an internal passage which allows the stop device and biasing device to be communicated to their final assembled position in the internal passage while the tappet is already inserted in a bore of the housing.

대표청구항 ▼

A tappet retainer assembly comprising: a housing having an inner peripheral surface defining a bore; a tappet having first and second end portions, each tappet end portion having an outer peripheral surface thereon, said tappet first end portion positioned outside of the housing bore, said tappet se

A tappet retainer assembly comprising: a housing having an inner peripheral surface defining a bore; a tappet having first and second end portions, each tappet end portion having an outer peripheral surface thereon, said tappet first end portion positioned outside of the housing bore, said tappet second end portion reciprocally positioned in the housing bore so that its outer peripheral surface is adjacent to and faces the housing inner peripheral surface, said tappet further including internal passage means extending from the outer peripheral surface of the tappet first end portion to the outer peripheral surface of the tappet second end portion; first means for biasing displacement of the tappet in a direction outwardly of the housing bore; stop means for limiting displacement of the tappet out of the housing bore, said stop means including an annular recess defined in the housing inner peripheral surface and a stop positioned in the tappet internal passage means; and second means for biasing the stop against the housing inner peripheral surface, said second biasing means positioned in the tappet internal passage means.