| 摘要 |
PURPOSE:To aim at reduction in the extent of noises in a way of dispersing an engaging knock, by making plural sprockets, constituting double row sprockets, differ in each tooth phase mutually, and stretching plural chains across parallelly in adjustment with the phase difference. CONSTITUTION:Double row sprockets 5 for a motorcycle or the like is constituted of shifting both teeth 51a and 51b for a portion as far as a half pitch mutually in a state of being separated at a regular interval in the axial direction so as to cause a pair of sprockets 51 and 52, equalizing a number of teeth, size and form, to prevent chain themselves stretched on these sprockets from interfering with each other. If doing like this, each roller of these chains stretched in parallel are not synchronously engaged and contacted with plural teeth of these double rot sprockets, so that an engaging knock is dispersed, thus noises are reducible.
|
