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FULLY AUTOMATIC LOCKING INTERAXLE DIFFERENTIAL FOR TANDEM VEHICLES

  • US 3,706,350 A
  • Filed: 12/09/1970
  • Issued: 12/19/1972
  • Est. Priority Date: 12/09/1970
  • Status: Expired due to Term
First Claim
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1. A tandem axle driveline for road vehicles comprising, a pair of rear-rear axles, a pair of rear axles, a drive shaft connecting said axles, a first differential assembly connecting one end of said drive shaft to each of said rear-rear axles including differential gearing having an input member connected to said drive shaft and two output members connected respectively to said rear-rear axle shafts, a second differential assembly having a power input element and two power output elements connected respectively to each of said rear axle shafts, an interaxle differential assembly having a power input member, a common housing for said interaxle differential assembly and said second differential assembly having separate portions enclosing each, drive gearing adjacent said interaxle differential assembly in the housing portion for the latter, said interaxle differential assembly having a pair of output elements, one of said interaxle differential output elements being connected drivably through said drive gearing to the power input element of said second differential assembly, the other interaxle differential output element being concentric with said power input member of said interaxle differential assembly and connected to the other end of said drive shaft, a first clutch member connected drivably to the power input element for said interaxle differential, a pair of output clutch elements with registering clutch teeth connected respectively to the torque output elements of said interaxle differential assembly, and cam means for selectively disengaging each of said pair of clutch elements from said input clutch member comprising registering cam parts carried by each of said clutch elements and by said input clutch member whereby the clutch teeth of one clutch element and said input clutch member are moved out of engagement when a tendency exists for an associated axle shaft to overrun.

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