| 摘要 |
PURPOSE:To let a driver know a traveling direction clearly by fitting a primary gear to the axle of both wheels of a differential gear and coupling a chain which transmits rotation to 1st bevel through a secondary gear with a primary detection shaft. CONSTITUTION:When a vehicle travels, the rotary motion of the right wheel is transmitted to the bevel gear 9 and the rotary motion of the left wheel is transmitted to a 3rd bevel gear 15 as reverse rotary motion having the same ratio, so the primary detection shaft 7 is put in rotary motion equivalent to the half of the difference between their rotary momenta by the guidance of swivel shafts 16 and 16<1> by the rotary motion of small bevel gears 13<1> and 13<2> only when the difference between the rotary momenta is generated. Therefore, when the vehicle travels straight, the 1st bevel gear 9 and 3rd bevel gear 15 are equal in rotary momentum, so the primary detection shaft 7 is in a stationary state continuously and when the vehicle travels along a curved road or turns, the outside wheel side increases in rotary momentum as a rotation difference obtained between the 1st bevel gear 9 and 3rd bevel gear 15 by multiplying the tred width equal to the radius of the vehicle by primary gears 5 and 5<1> for secondary gear 6 and 6<1> per 360 deg. according to the angle of variation. |
