US3754625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle final drive with planetary gearing and friction brake
Assignee: Fiat Allis Europe SpA
•
Filing: 1972-06-07
•
Granted: 1973-08-28
•
Expires: 1992-06-07
Abstract
Abstract A planetary final drive and brake are incorporated within a wheel hub of a land vehicle with the ring gear structure nonrotatably connected to the end of a stationary hollow axle through which a drive shaft extends and carries a sun gear and brake disc. The ring gear structure carries friction pads and a hydraulic actuator for the friction brake and fluid is routed to the hydraulic actuator by way of passages in the stationary hollow axle and the ring gear structure.
Inventors
- 👤 J Voth
- 👤 A Speck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:28
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/062; B60K; B60K17/00; B60K17/04; B60K17/043; B60K17/046; F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D55/32; F16H; F16H57/00; F16H57/08; F16H57/10; Y; Y10; Y10S; Y10S475/00; Y10S475/90; Y10T; Y10T74/00; Y10T74/19; Y10T74/19545
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
167 words
In a vehicle final drive, the combination comprising: a hollow nonrotating axle having an open end, ground engaging traction means including a hollow drive hub having an axially inner wall presenting an axial opening through which said axle extends, and a closed axially outer wall spaced axially From said inner wall and from said open end of said axle, bearing means rotatably mounting said inner wall on said axle, a drive shaft within said axle having one end extending axially beyond said open end of said axle, a sun gear nonrotatably mounted on and in coaxial relation to said end of said drive shaft, a ring gear structure nonrotatably secured to said open end of said axle and having an internal ring gear, a plurality of circumferentially spaced planet pinions rotatably mounted on said outer wall of said wheel hub and each in mesh with said sun and ring gears, and a selectively actuated brake between said end of said drive shaft and said ring gear structure.
Claim 2
Dependent Claim
167 words
In a vehicle final drive, the combination comprising: a hollow nonrotating axle having an open end, ground engaging traction means including a hollow drive hub having an axially inner wall presenting an axial opening through which said axle extends, and a closed axially outer wall spaced axially From said inner wall and from said open end of said axle, bearing means rotatably mounting said inner wall on said axle, a drive shaft within said axle having one end extending axially beyond said open end of said axle, a sun gear nonrotatably mounted on and in coaxial relation to said end of said drive shaft, a ring gear structure nonrotatably secured to said open end of said axle and having an internal ring gear, a plurality of circumferentially spaced planet pinions rotatably mounted on said outer wall of said wheel hub and each in mesh with said sun and ring gears, and a selectively actuated brake between said end of said drive shaft and said ring gear structure.
Claim 3
Dependent Claim
23 words
The invention of claim 1 wherein said brake includes a brake disc connected in coaxial relation to said drive shaft for rotation therewith.
Claim 4
Dependent Claim
18 words
The invention of claim 2 wherein said brake disc is connected to and rotates with said sun gear.
Claim 5
Dependent Claim
28 words
The invention of claim 3 wherein said brake disc is splined to said sun gear whereby said disc is free to float axially relative to said sun gear.
Claim 6
Dependent Claim
28 words
The invention of claim 4 wherein said brake includes a pair of friction pads on said ring gear structure engageable, respectively, with opposite axial sides of said disc.
Claim 7
Dependent Claim
45 words
The invention of claim 5 wherein said brake includes a hydraulic actuator on said ring gear structure operatively associated in axial thrust transmitting engagement with at least one of said pads and selectively operable to bring said pads into frictional braking engagement with said disc.
Claim 8
Dependent Claim
32 words
The invention of claim 6 wherein said bearing means includes a pair of axially spaced antifriction bearings and wherein at least one of said bearings is mounted on said ring gear structure.
Claim 9
Dependent Claim
24 words
The invention of claim 7 and further comprising passages in said axle and ring gear structure for conveying hydraulic fluid to said hydraulic actuator.
Claim 10
Dependent Claim
21 words
The invention of claim 8 wherein said hub contains lubricating fluid serving to lubricate and cool said bearings, gears and brake.
Claim 11
Dependent Claim
37 words
The invention of claim 9 wherein said hydraulic actuator includes an annular axially opening recess formed in said ring gear structure and an annular piston operatively disposed in said recess for movement axially of said brake disc.
Claim 12
Dependent Claim
35 words
The invention of claim 1 wherein said outer wall includes an axial opening aligned with and sufficiently large to permit axial removal of said sun gear therethrough and a releasable cap normally covering said opening.
References Cited (Backward Citations)
US2953040A
Cited
US3043155A
Cited
US3184985A
Cited
US3150532A
Cited
US3184994A
Cited
US3301359A
Cited
US3382958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |