Rear assembly tandem axle differential carrier

• US 7,059,215 B1
• Filed: 07/14/2003
• Issued: 06/13/2006
• Est. Priority Date: 07/14/2003
• Status: Expired due to Term

• Current Assignee: Dana Heavy Vehicle Systems Group LLC (Dana, Inc.)
• Original Assignee: Dana Corporation (Dana, Inc.)
• Inventors: Ziech, James
• Primary Examiner(s): LEWIS, TISHA D
• Application Number:
  US10/618,991
• Time in Patent Office: 1,065 Days
• Field of Search: 746/50, 746/06.R, 746/07, 180/24.09, 180/24.1, 180/24.11, 475/221, 475/206, 475/230
• US Class Current: 74/650
• CPC Class Codes: B60K 17/36 for driving tandem wheels
• CPC Class Codes: F16H 2057/02052 Axle units; Transfer casings for four wheel drive
• CPC Class Codes: F16H 2057/0206 for commercial vehicles, e.g. buses or trucks
• CPC Class Codes: F16H 48/12 without gears having orbital motion
• CPC Class Codes: F16H 57/023 Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
• CPC Class Codes: F16H 57/037 Gearboxes for accommodating differential gearings rotating cases for differential gearings F16H48/40
• CPC Class Codes: F16H 57/04 Features relating to lubrication or cooling or heatingin hydrokinetic gearing F16H41/30; control of lubrication or cooling in hydrostatic gearing F16H61/4165
• CPC Class Codes: Y10T 74/19005 Nonplanetary gearing differential type [e.g., gearless differentials]
• CPC Class Codes: Y10T 74/2186 Gear casings

Abstract

A method of assembling a drive axle assembly of a tandem axle assembly is provided. The method includes the step of providing a differential carrier housing having a forward opening and a rear opening. The method further includes inserting several internal components of the drive axle assembly through the rear opening of the carrier housing including input and output gears, a driven gear, a pinion shaft which is rotatably coupled to the driven gear, and a power divider subassembly having a plurality of differential gears. Insertion of these components through the rear opening facilitates the use of a one-piece differential carrier housing with small front openings and maximum structural integrity.

Claims

1. A differential carrier housing, comprising:

a body having a first forward opening at a forward end of said body and a rear opening at a rearward end of said body, said body configured to receive an input shaft, a power divider subassembly, a pinion shaft subassembly, and a differential clutch, said body further including a second forward opening configured to allow insertion of bearings supporting one end of a pinion shaft of said pinion shaft subassembly, said second forward opening having a diameter about equal to a diameter of a bearing cup of said bearing, said body still further including a third forward opening configured to allow insertion of a piston associated with said differential clutch, said third forward opening having a diameter about equal to a diameter of said piston;

a radially extending flange extending from said body proximate said rearward end of said body and configured for connection to an axle housing; and

wherein said rear opening is configured to allow insertion of said power divider subassembly and said pinion shaft subassembly into said body and said first forward opening is configured to allow insertion of said input shaft and a bearing cone disposed about said input shaft, said first forward opening having a diameter about equal to one of a diameter of said bearing cone and a diameter of a bearing adjuster.

2. The differential carrier housing of claim 1 wherein said differential carrier housing is of a one-piece construction.

3. The differential carrier housing of claim 1 wherein said body is configured to receive a shift fork subassembly.

4. The differential carrier housing of claim 3 wherein said rear opening in said body is configured to allow insertion of said shift fork subassembly into said body.

5. The differential carrier housing of claim 1 wherein said body is configured to receive a first gear.

6. The differential carrier housing of claim 5 wherein said rear opening in said body is configured to allow insertion of said first gear into said body.

7. The differential carrier housing of claim 5 wherein said first gear is rotatably coupled to said pinion shaft.

8. The differential carrier housing of claim 5 wherein said first gear is disposed between forward and rear pinion bearing support structures defined in said carrier housing.

9. The differential carrier housing of claim 1 wherein said body is configured to receive a second gear.

10. The differential carrier housing of claim 9 wherein said rear opening in said body is configured to allow insertion of said second gear into said body.

11. The differential carrier housing of claim 10 wherein said power divider subassembly includes a plurality of differential gears and said second gear is in mesh with said plurality of gears on a rearward side of said power divider subassembly.

12. The differential carrier housing of claim 1 wherein said body is configured to receive a third gear.

13. The differential carrier housing of claim 12 wherein said rear opening in said body is configured to allow insertion of said third gear into said body.

14. The differential carrier housing of claim 13 wherein said power divider subassembly includes a plurality of differential gears and said third gear is in mesh with said plurality of gears on a forward side of said power divider subassembly.