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Power train for two-wheel tractor

  • US 4,063,361 A
  • Filed: 01/03/1977
  • Issued: 12/20/1977
  • Est. Priority Date: 01/03/1977
  • Status: Expired due to Term
First Claim
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1. An off-highway vehicle comprising, in combination, a tractor section and a trailing section, the trailing section having a pair of ground-engaging wheels, the tractor section having a pair of ground-engaging wheels, a draft frame providing rolling rigidity interposed between the sections, the tractor section having an axle assembly including a tractor axle as well as an axle housing and a forwardly projecting tongue rigidly secured thereto, the tractor section having an engine coupled to the respective pair of ground-engaging wheels, the tractor engine being mounted at the rear of the tractor section, a transmission at the front of the tractor section having its input coupled to the engine, a drive shaft extending rearwardly from the transmission and coupled to the tractor axle, the tractor axle assembly having alined front and rear pivot connections defining an axle roll axis, the front pivot connection being connected to the tractor section, a spring suspension device interposed between the rear pivot connection and the tractor section to accommodate vertical androlling movement of the tractor axle housing as the machine passes over irregular ground, the drive shaft having universal joints at its ends, the forward pivot connection of the axle assembly being positioned substantially midway of the universal joints for substantially equal angular deflection at the joints upon a given amount of relative vertical movement of the tractor axle housing.

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