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Planetary gear apparatus

A technology of planetary gears and sun gears, which is applied in the field of improvement of planetary gear carriers, can solve the problems of reduced gear durability, improper meshing of gears, gear noise, etc., and achieves the effect of increasing torsional rigidity and reducing processing costs.

Inactive Publication Date: 2007-07-04
AISIN AW CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the rigidity of the planetary gear carrier 100 is insufficient, the planetary gear carrier 100 will be deformed, and the gears will not mesh properly, which may cause problems such as reduced durability of the gears and generation of gear noise.

Method used

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Embodiment Construction

[0028] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows the whole of the double-gear type planetary gear device 10 after the first and second two sets of planetary gears 11, 12 are combined, and Fig. 2, Fig. 3 and Fig. 4 represent lines A-A, B-B and C-C of Fig. 1 Sectional view of each part cut separately. The planetary gear unit 10 mainly includes: an input shaft 13 rotatably supported on a housing not shown in the figure; first and second sun gears 15 and 16 respectively supported on the input shaft 13 so as to be relatively rotatable; A plurality of narrow gears 17 on the circumference engaged with a sun gear 15; a plurality of wide gears 18 engaged on the circumference with these narrow gears 17 and the second sun gear 16; a ring gear 19 engaged with the wide gear 18; Said narrow gear 17 and wide gear 18 and ensure that it can rotate the planetary gear carrier 20.

[0029] The input shaft 13 is driven...

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Abstract

Because spiral cable is needed for arranging the current transmission ratio-variable mechanism on the steering column, additional time is needed, and the probability of the accidents caused by cable breaking-off and so on still exists. The housing 21 fixed to the steering column 13 rotatablely supports an operation shaft 11 and an output shaft 22 on which opposite ends a first and a second sun gears 45, 46 are provided. A first and a second planetary gears 53, 54, which respectively engage with the first and the second sun gears, are supported by a planetary gear bracket 47, and are arranged at the motor 43 arranged on the housing along a direction which is vertical to the rotary shaft lines of the operation shaft and the output shaft to rotate a worm shaft 58 which engages with a worm wheel 57 rotatablely connected to the planetary gear bracket. Therefore, spiral cable can be abandoned, and a space-saving transmission ratio-variable steering device 10 can be obtained.

Description

technical field [0001] The present invention relates to a planetary gear unit used in an automatic transmission and the like, and particularly relates to an improvement of a planetary carrier in a double-pinion type planetary gear unit having narrow gears and wide gears. Background technique [0002] Generally, a so-called Ravenau-type double-gear type planetary gear unit is used in an automatic transmission of an automobile. As described in Japanese Patent Laid-Open No. 10-169728, the planetary gear device mainly includes: first and second sun gears respectively supported on the input shaft in a relatively rotatable manner; meshed with the first sun gear and arranged on the same a plurality of narrow gears on the circumference; a plurality of wide gears engaged with the narrow gear and the second sun gear and arranged on the same circumference; a ring gear engaged with the wide gear; and supporting the narrow gear and the second sun gear respectively. A planetary gear carr...

Claims

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Application Information

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IPC IPC(8): F16H3/62F16H57/02F16H1/36F16H57/023F16H57/08
CPCF16H57/082F16H3/663
Inventor 中川兼良加藤直司加藤进太田博
Owner AISIN AW CO LTD
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