Planetary gear transmission systems or components – Planet periphery surrounds axis of interacting gear – Gear teeth comprise rolling bodies
Patent
1995-06-29
1997-03-11
Wright, Dirk
Planetary gear transmission systems or components
Planet periphery surrounds axis of interacting gear
Gear teeth comprise rolling bodies
F16H 132
Patent
active
056095392
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a transmission means for transmitting a rotary movement in accordance with the preamble of claim 1.
Transmission means of the initially mentioned type are known and described, for example, in EP-A 211 687. In such case, cylindrical entrainment means are provided, which can be brought into engagement both with the internal toothing and with the external toothing of the toothed wheels, which co-operate with one another. Separate entrainment means are involved, therefore, which engage in the toothing of the respective toothed wheel. However, there is a line contact between the entrainment means and the teeth here, since the cross-sections of the entrainment means and the teeth are different. In consequence, the teeth are always stressed and considerably charged thereby, and such may lead to premature wear both of the teeth and of the entrainment means. Furthermore, a spur wheel transmission means is disclosed in DE-A 912 412, having the power of rolling bodies transmitted by a ball, or respectively balls, and rollers. An internal toothing and an external toothing in the sense of the invention are not disclosed. It is thereby significant, in the known case, that two pairs at a time co-operate with each other at the most, such being in the form of ball/ball or ball/cylinder. An additional disadvantage of this transmission means resides in the magnitude of the power transmission of the co-operating pairs (ball/ball or respectively ball/cylinder), where the power is transmitted at certain points. This also causes the entrainment means to wear prematurely. Finally, a hydraulic motor is illustrated in U.S. Pat. No. 4,394, 112, wherein the internal toothed wheel and the external toothed wheel are provided with cylindrical entrainment means. In such case, the toothed wheels are so disposed relative to one another that a tight separation is always ensured for the chambers of the hydraulic motor. Because of this fact, high marginal stresses are produced in the contact region of the cylinder pairs, and such stresses considerably impair the transmission of power from the co-operating cylinder pairs.
On the basis of the above prior art, the basic object of the invention is to provide a remedy here.
The set object is achieved, according to the invention, by the features of claim 1.
Additional expedient and advantageous features of the invention are described in the dependent claims.
The external toothing of the drive wheel comprises interchangeable entrainment means, which have a circular cross-section and are mounted in axially extending receiving means, which are provided on the outer circumference of the drive wheel, these receiving means being uniformly distributed over the outer circumference. The internal toothing comprises interchangeable entrainment means, which have a circular cross-section and are mounted in axially extending receiving means of the toothed wheel disposed on the inner circumference, said receiving means having a uniform spacing therebetween. The receiving means of the toothed wheels have an arcuate or gothic cross-section.
In their seating region, the receiving means are provided with lubrication grooves, which contribute towards the formation of a lubricating layer. The entrainment means of the toothed wheels are rollers having a linear profile or a profile which is slightly modified on both sides. In such case, all of the entrainment means of the driven toothed wheel and all of the entrainment means of the driving toothed wheel have the same cross-section in a common radial sectional plane. The entrainment means of the toothed wheels are rotatably mounted in the receiving means. The receiving means may be provided with coverings, which have a suitable rolling property and sufficient strength. The difference in the number of teeth of the internal toothing and of the external toothing is dependent on the transmission. The entrainment means of the driven toothed wheel may also be provided in a modified configuration. In such case, they are formed from sleeves, which are mou
REFERENCES:
patent: 2704459 (1955-03-01), Nanni
patent: 3910733 (1975-10-01), Grove
patent: 3979167 (1976-09-01), Grove
Herstek Jozef
Janek Bartolomej
Kasper Horst M.
Wright Dirk
LandOfFree
Transmission means for transmitting a rotary movement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission means for transmitting a rotary movement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission means for transmitting a rotary movement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-439029