Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1992-11-18
1994-03-22
Braun, Leslie A.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
475337, F16H 128
Patent
active
052959252
ABSTRACT:
A two-stage planetary gear transmission having a first-stage planetary gear transmission and a second-stage planetary gear transmission is disclosed, wherein the carrier of the second-stage planetary gear transmission comprises first and second carrier parts integrally connected with each other. A hollow pinion shaft formed thereon with the sun gear of the second stage is rotationally supported on the first carrier part via a deep-channel ball bearing in a cantilevered condition. A carrier of the first stage for supporting planetary gears of the first stage is integrally formed on the end of the hollow pinion shaft of the second stage. A lubricant layer of about 15 .mu.m to about 20 .mu.m in width is formed between an inner race member of a planetary bearing and a planetary shaft for each of the planetary gears of the second stage. In addition, the gear ratio u1 of the first-stage planetary gear transmission is larger than the gear ratio u2 of the second-stage planetary gear transmission, and which is equal to or larger than about 5. According to the present invention, misalignment or improper meshing of the gears of the first stage can be adjusted by movement of the cantilevered pinion shaft of the second stage. Improper meshing of the planetary gears of the second stage can be adjusted by the lubricant layer. In addition, the noise from the planetary gear transmission can be reduced by setting the the gear ratios of the first and second stage as mentioned above.
REFERENCES:
patent: 2999401 (1961-09-01), Bedard et al.
patent: 4091688 (1978-05-01), Huffman
Braun Leslie A.
Harmonic Drive Systems Inc.
Ta Khon
LandOfFree
Planetary gear transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Planetary gear transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planetary gear transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-432970