Transfer case with aluminum yoke
AssigneeBorgWarner Inc.
InventorsPhilip J. Francis, Thomas Knox, Greg Bartman, Arun Narayanan
Life of this patent
Estimating the term…
Abstract
A transfer case for a normally rear wheel drive vehicle having selectively engageable front wheel drive is provided. The transfer case includes a rear housing with a main drive shaft aperture and an aluminum cast front housing threadably connected with the rear housing. The front housing has a main drive shaft aperture axially aligned with the rear housing main drive shaft aperture. The front housing has an integrally formed cylindrical yoke forming an isolation mount for receiving a polymeric isolator allowing for connection of the transfer case with a chassis structure of the vehicle. The cylindrical yoke has a cylindrical preform therein.
Claims20
A transfer case for a normally rear wheel drive vehicle having selectively engageable front wheel drive, said transfer case including:
- a rear housing with a main drive shaft aperture;
- a main drive shaft supported by said rear housing and connected with a rear output yoke;
- an aluminum cast front housing threadably connected with said rear housing, said front housing having a main drive shaft aperture axially aligned with said rear housing main drive shaft aperture, said front housing supporting said main drive shaft, said front housing having a front axle output shaft aperture, said front housing having an integrally formed cylindrical yoke axially unclamped to said rear housing or to a transmission, said cylindrical yoke forming an isolation mount for receiving a polymeric isolator for connection of said transfer case with a chassis structure of said vehicle, said cylindrical yoke having accepting a metal cylindrical preform taken from a group of materials including steel and titanium therein, said preform being connected with a sub-preform, said sub-preform surrounding a bolt hole from a group of bolt holes used to connect said front housing with said transmission and said front housing with said rear housing, and wherein said bolt holes are at least four times smaller than an inner diameter of said yoke.
(canceled)
(canceled)
A transfer cases as described in claim number 7 wherein said lower boundary sub-preform has multiple portions surrounding bolt holes connecting said front housing with said rear housing.
A transfer case for a normally rear wheel drive automotive vehicle having selectively engageable front wheel drive, said transfer case including:
- a rear housing with a main drive shaft aperture;
- a main drive shaft supported by said rear housing and connected with a rear output yoke
- a cast aluminum front housing threadably connected with said rear housing, said front housing having a main drive shaft aperture axially aligned with said rear housing main drive shaft aperture, said front housing supporting said main drive shaft, said front housing having a front axle output shaft aperture, said front housing having an integrally formed cylindrical yoke axially unclamped to said rear housing or to a transmission forming an isolation mount for receiving a polymeric isolator for connection of said transfer case with a chassis structure of said vehicle, said cylindrical yoke accepting a main body cylindrical preform therein, said main body cylindrical preform material taken from a group including steel and titanium and wherein said main body cylindrical preform has a transmission connection sub-preform, said transmission connection sub-preform has a portion surrounding a bolt hole utilized for an axial clamped_connection of said front housing with the transmission of the vehicle, and wherein said bolt hole is at least four times smaller than an inner diameter of said yoke and said main body cylindrical preform having a connected lower boundary extension sub-preform and a connected side extension sub-preform.
(canceled)
A transfer case as described in claim 19 wherein said preform is axially aligned with a load point between a chassis of the vehicle and said transfer case.
A transfer case for a normally rear wheel drive automotive vehicle having selectively engageable front wheel drive, said transfer case including:
- a rear housing with a main drive shaft aperture;
- a main drive shaft supported by said rear housing and connected with a rear output yoke;
- an aluminum cast front housing threadably connected with said rear housing, said front housing having a main drive shaft aperture axially aligned with said rear housing main drive shaft aperture, said front housing supporting said main drive shaft, said front housing having a front axle output shaft aperture, said front housing having an integrally formed cylindrical yoke axially unclamped to said rear housing or to a transmission, said yoke forming an isolation mount for receiving a polymeric isolator for connection of said transfer case with a chassis structure of said vehicle, said cylindrical yoke having therein a main body accepting a cylindrical preform at least 1 mm thick steel perforated preform axially aligned with a load point between a chassis of the vehicle and said transfer case, and
- wherein said main body cylindrical preform has a transmission connection sub-preform, said transmission connection sub-preform has a portion surrounding a bolt hole utilized for axially clamped connection of said front housing with the transmission of the vehicle, and said main body cylindrical preform having a connected lower boundary extension sub-preform and a connected side extension sub-preform, said lower boundary extension sub-preform having multiple portions surrounding bolt holes utilized in axially clamped connecting said front housing with said rear housing, said side extension sub-preform having a portion surrounding a bolt hole utilized in axially clamped connecting said front housing with the transmission of the vehicle and wherein all said bolt holes are at least four times smaller than an inner diameter of said yoke. Accordingly the rejection should be lifted.
Dependencies are inferred from the claim text.