| 摘要 |
A method of assembling an ignition distributor of the kind including a base plate which is secured to the casing of the distributor and a timing plate mounted for angular movement on the base plate, the timing plate carrying in use the contact breaker assembly of the distributor, including the steps of engaging the annular timing plate with the base plate. The base plate and the timing plate include mating surfaces which locate the timing plates for angular movement on the base plate when the timing plate and base plate are interengaged. Three tags or ears formed on the base plate are then deformed to overlie the surface of the timing plate remote from the base plate, the ears being such that any one of the ears is on the opposite side of a diameter of the plate from the remaining ears. The ears are bent to a position such that a predetermined clearance exists between the lower surfaces of the ears and the upper surface of the timing plate, so that the timing plate is held against disengagement from the base plate in an axial direction, but there is a predetermined amount of clearance between the ears and the timing plate, so that the timing plate is capable of small movements in an axial direction. In a first alternative the ears are deformed to the desired position prior to engagement of the timing plate with the base plate, and the timing plate is formed with slots through which the ears pass when the timing plate is engaged with the base plate. In a further modification the timing plate includes a plurality of projections onto which the ears are bent, the projections defining the extent of the clearance, and in a still further alternative the timing plate has projections which engage the base plate, and the base plate has apertures into which the projections can locate upon angular movement of the timing plate relative to the base plate. In this embodiment, the ears are deformed into engagement with the timing plate while the projections engage the surface of the base plate, and the timing plate is then rotated so that the projections locate in the apertures, and the predetermined clearance exists between the timing plate and the ears. |
