Abstract This invention relates to a double reduction tandem axle driving unit comprising a housing with a plurality of walls and a flange to secure the housing to a drive axle's housing. The drive shaft is journalled in said housing and a bevel pinion is disposed on said drive shaft. A cross-shaft is journalled in the front and back walls of said housing at generally right angles to said drive shaft. A bevel gear is on said cross-shaft, and meshes with said bevel pinion of said drive shaft. A spur pinion is on said cross-shaft near said bevel gear and a spur gear is secured to a carrier of a differential mechanism for said drive axle. The spur gear meshes with said spur pinion and said flange is provided with an aperture for passing said bevel gear and said spur gear. A first bearing is disposed at the end of said cross-shaft where said bevel gear is located and a second bearing is disposed at the opposite end of said cross-shaft where said spur pinion is located. A partition inside said housing, passes between said drive shaft and said cross-shaft from said top wall to said flange, and said partition is provided with an aperture for permitting engagement of said bevel pinion with said bevel gear. The partition serves as the support for said first bearing. A support for said second bearing is in one of said side walls of said housing; whereby with such construction rigidity of the unit's housing is increased and assembly or disassembly of the double reduction unit is generally simplified, and whereby the unit's loading is diminished due to larger bevel gear sizes resulting in a generally longer service life for said unit. Due to said construction, the rigidity of the housing is enhanced whereas the manufacture, assembly and disassembly double reduction unit are simplified. In addition, said construction permits an increase in the size of the meshing bevel gears.
A double reduction tandem axle driving unit for an automotive vehicle comprising: a housing with a top wall, side walls, a front wall and a flange to secure the housing to a drive axle's housing, a drive shaft journalled in said housing; a bevel pinion on said drive shaft; a cross-shaft being journalled in said front and back walls of said housing at generally right angles to said drive shaft; a bevel gear on said cross-shaft, said bevel gear being in permanent mesh with said bevel pinion of said drive shaft; a spur pinion on said cross-shaft in close proximity to said bevel gear; a spur gear secured to a carrier of a differential mechanism for said drive axle, said spur gear being in permanent mesh with said spur pinion; said flange being provided with an aperture for passing said bevel gear and said spur gear; a first bearing disposed at the end of said cross-shaft where said bevel gear is located; a second bearing disposed at the opposite end of said cross-shaft where said spur pinion is located; a partition inside said housing, passes between said drive shaft and said cross-shaft from said top wall to said flange, said partition being provided with an aperture for permitting engagement of said bevel pinion with said bevel gear; said partition serving as the support for said first bearing; a support for said second bearing being in one of said side walls of said housing; whereby with such construction rigidity of the unit's housing is increased and assembly or disassembly of the double reduction unit is generally simplified, and whereby gear loading is diminished due to larger bevel gear sizes resulting in a generally longer service life for said unit.
Claim 2
Dependent Claim
288 words
A double reduction tandem axle driving unit for an automotive vehicle comprising: a housing with a top wall, side walls, a front wall and a flange to secure the housing to a drive axle's housing, a drive shaft journalled in said housing; a bevel pinion on said drive shaft; a cross-shaft being journalled in said front and back walls of said housing at generally right angles to said drive shaft; a bevel gear on said cross-shaft, said bevel gear being in permanent mesh with said bevel pinion of said drive shaft; a spur pinion on said cross-shaft in close proximity to said bevel gear; a spur gear secured to a carrier of a differential mechanism for said drive axle, said spur gear being in permanent mesh with said spur pinion; said flange being provided with an aperture for passing said bevel gear and said spur gear; a first bearing disposed at the end of said cross-shaft where said bevel gear is located; a second bearing disposed at the opposite end of said cross-shaft where said spur pinion is located; a partition inside said housing, passes between said drive shaft and said cross-shaft from said top wall to said flange, said partition being provided with an aperture for permitting engagement of said bevel pinion with said bevel gear; said partition serving as the support for said first bearing; a support for said second bearing being in one of said side walls of said housing; whereby with such construction rigidity of the unit's housing is increased and assembly or disassembly of the double reduction unit is generally simplified, and whereby gear loading is diminished due to larger bevel gear sizes resulting in a generally longer service life for said unit.
Claim 3
Dependent Claim
24 words
The double reduction tandem axle driving unit according to claim 1, wherein said spur gear on said cross-shaft is integrally formed with said cross-shaft.
Claim 4
Dependent Claim
36 words
The double reduction tandem axle driving unit according to claim 1, wherein the driven bevel gear is located between the journalled bearings of said cross-shaft and between said spur pinion and one of said journalled bearings.
Claim 5
Dependent Claim
20 words
The double reduction tandem axle driving unit according to claim 1, wherein said partition is formed integrally with said housing.