Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1985-01-23
1988-01-12
Braun, Leslie
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74711, F16H 3706
Patent
active
047183004
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a distributor transmission having the following features: planetary carrier, planetary gears, a ring gear and a sun gear; planetary gears; oil.
Distributors transmissions of this kind are known already (DE-AS 21 35 791, U.S. Pat. No. 3,760,922, Canadian Pat. No. 985,067, U.S. Pat. Nos. 4,022,084, 4,040,271) as central differential transmissions for motor vehicles having two continuously driven axles. In most of these known distributor transmissions the viscous clutch is situated axially between the output gear designed as chain gear and the planetary transmission. This arrangement offers the lowest cost of construction. Only in the distributor transmission according to Canadian Pat. No. 985,067 is the viscous clutch situated radially outside the planetary transmission with the advantage that with a small total length of the whole distributor transmission the viscous clutch attains a specially great torque with its large diameter.
In all these structures the planetary transmission must be wholly or partly removed during repair works.
The problem on which the invention is based is to design a distributor transmission of this kind in a manner such that the viscose clutch can be dismounted and mounted during repair works without it being also necessary to dismount parts of the planetary transmission.
According to the invention, there is provided a distributor transmission having the following features: having a planetary carrier (2), planetary gears (3), a ring gear (4) and a sun gear (5); via said planetary gears (3); silicon oil, characterized by the following features: gear (6) and said viscous clutch (7); (5) with said casing (9); (9) with said coupling pan (14); gear (8) with said output shaft (13); (7). This solves the aforesaid problem since the viscous clutch can be axially withdrawn as a complete assembly from the drag section of the coupling pans and from the spline section of the output shaft as soon as a part of the housing has been removed with a support. It is also possible just as simply to mount again the viscose clutch or a new viscous clutch as complete, functionally tested assembly. The repair works are thereby made simpler and easier.
The cost of production, the installation and the operation are still further reduced by the other features of the invention namely: expenses; transmission of the same power smaller chain gears with smaller peripheral speed, thus producing less grinding losses than a roller chain; due to link friction; structural part; parts.
FIG. 1 and FIG. 2 of the drawing show as segments of a longitudinal section two embodiments of distributor transmissions according to the invention.
A drive shaft 12 drives a planetary carrier 2 of a spur-gear planetary transmission 1. The planetary carrier 2 carries planetary gears 3 and drives, via said planetary gears 3, a ring gear 4 and a sun gear 5. The ring gear 4 drives an output shaft 13 and is firmly connected with the output shaft 13 via a welded seam 19. The sun gear 5 drives an output gear 6. The sun gear 5 and the output gear 6 are made of one piece and substantially produced without cutting by casting, sintering or cold molding.
A viscous clutch 7 has a ring gear 8 and a casing 9. The ring gear 8 carries inner discs 10 in an outer spline section. The casing 9 carries outer discs 11 in an inner spline section. The casing 9 has a pan 15 and a cap 16 firmly and tightly connected with each other by a welded seam 21. Gaskets 26, 27 in the casing 9 slide upon the ring gear 9. The viscous clutch 7 is substantially filled with high-viscosity silicon oil.
A welded seam 20 (FIG. 1) of a drag section 25 having axially securing rings (FIG. 2) firmly connects a coupling pan 14 with the sun gear 5. A spline section 22 torsion-proof and axially movably connects the coupling pan 14 with the casing 9. A spline section 23 torsion-proof and axially movably connects the ring gear 8 with the output shaft 13. A joint 24 of the housing separates a housing 30 from a housing part 28 with a bearing 29 for the output shaft 13.
REFERENCES:
patent: 3760922 (1973-09-01), Rolt et al.
patent: 3923113 (1975-12-01), Pagdin
patent: 4022084 (1977-05-01), Pagdin
patent: 4031780 (1977-06-01), Dolan et al.
patent: 4040271 (1977-08-01), Rolt et al.
patent: 4063470 (1977-12-01), Kelbel
patent: 4369671 (1983-01-01), Matsumoto et al.
patent: 4458557 (1984-07-01), Hayakawa
Automotive Engineer, Apr./May 1981, "FF Developments Poised for OE Expansion", see p. 28, FIG. 12a.
Braun Leslie
Novais David
Zahnradfabrik Friedrichshafen AG
LandOfFree
Power-drive transmission with viscous clutch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power-drive transmission with viscous clutch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-drive transmission with viscous clutch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-914801