Locking differential with improved tooth meshing configuration

• US 6,394,927 B1
• Filed: 10/17/2000
• Issued: 05/28/2002
• Est. Priority Date: 10/17/2000
• Status: Expired due to Term

• Current Assignee: ARB Corporation Limited
• Original Assignee: ARB Corporation Limited
• Inventors: Bongard, Daniel Jason
• Primary Examiner(s): Bonck, Rodney H.
• Assistant Examiner(s): Le, David D.
• Application Number:
  US09/690,779
• Time in Patent Office: 588 Days
• Field of Search: 475/231,230,236,344,86 74/459.5,423
• US Class Current: 475/231
• CPC Class Codes: F16H 2048/204 Control of arrangements for suppressing differential actions
• CPC Class Codes: F16H 2200/2071 using three freewheel mechanism
• CPC Class Codes: F16H 48/08 comprising bevel gears
• CPC Class Codes: F16H 48/24 using positive clutches or brakes
• CPC Class Codes: F16H 48/30 using externally-actuatable means
• CPC Class Codes: F16H 48/32 using fluid pressure actuators
• CPC Class Codes: F16H 48/34 using electromagnetic or electric actuators

Abstract

A locking differential including a differential carrier or housing 1 closed by a flange cap 2 engaging locking gear 2A, the housing 1 and flange cap 2 supporting side gears 10 and 11 which mesh with pinion gears 12 supported by cross shafts 8 and 9, the cross shafts engaging mounting holes in the housing 1, each pinion gear having an even number of teeth, and each side gear having a number of teeth which is a multiple of two where two pinions are at 180° to each other, three where three pinion gears are at 120° to each other, four where three or four pinion gears are at 90° to each other, or five where five pinions are at 72° to each other, the locking means further including a clutch gear 5 which slidably engages the locking gear 2A and the teeth on side gear 10 in the locked position, the cross shafts 8 and 9 being in a fixed relationship to the locking gear 2A.

Claims

1. A locking differential including a differential carrier housing a pair of bevel side gears and from two to five pinion gears which mesh with said pair of bevel side gears, locking means positioned within said differential carrier between said differential carrier and one of said bevel gears, said locking means including locking teeth or splines adapted to engage teeth or splines on said one of said bevel gears to lock the differential, said side gears having teeth in multiples of two to five, depending on the angular positions of the axes of rotation of said pinions with respect to each other, said pinions being mounted on cross shafts, defining said axes of rotation, which are supported by the housing in a fixed position relative to said locking means such that the teeth of the side gears and the pinion gears are substantially optimally meshed whenever the locking means is in the locked position.

2. The locking differential of claim 1, wherein each side gear has the same number of teeth as the number of teeth or splines in the locking means.

3. The locking differential of claim 2, wherein the teeth of said locking means directly engage the teeth of said one of said side gears.

4. The locking differential of claims 1, 2 or 3, wherein each pinion has an even number of teeth and each side gear has a number of teeth which is a multiple of two, three, four or five depending on the angular positions of the axes of rotation of said pinions, the multiple two corresponding to pinions arranged at 180°

to each other, the multiple three corresponding to pinions arranged at 120°

to each other, the multiple four corresponding to pinions arranged at 90°

to each other, and the multiple five corresponding to pinions arranged at 72°

to each other.