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Oscillating internal engagement type planetary gear device and its durability increasing method

A planetary gear, internal meshing technology, applied in the direction of gear transmission, transmission, transmission parts, etc., can solve problems such as use restrictions

Active Publication Date: 2004-10-06
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, it is said that sodium nitrite reacts with a certain chemical substance to produce carcinogenic amine nitrite, so it is possible that some countries centered in Europe will strictly restrict its use in the near future

Method used

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  • Oscillating internal engagement type planetary gear device and its durability increasing method
  • Oscillating internal engagement type planetary gear device and its durability increasing method

Examples

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Embodiment 1

[0040] In the oscillating internal meshing type planetary gear device of this embodiment, the present applicant used a commercially available cyclo (Cyclo: registered trademark) speed reducer as members other than grease. Temprex N2 manufactured by ExxonMobil Co., Ltd. was used as the grease constituting the present invention for the trochoidal tooth profile and internal between the export pins of the gear. As shown in Table 1, this grease contains a lithium complex using adipic acid as a thickener as a raw material, and also contains a kinematic viscosity at 100°C (JIS K2283, the same below) of 11.9mm 2 / s, dynamic viscosity at 40°C (JIS K2283, the same below) is 111mm 2 / s base oil. In both Examples and Comparative Examples, paraffin series mineral oil was used as the base oil.

[0041] In Table 1, the so-called base oil viscosity refers to the dynamic viscosity of the base oil, the unit is mm 2 / s.

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Abstract

In the oscillating internal-meshing planetary gear system of the present invention, a space formed between a external gear and a internal gear is filled up with a grease, which contains base oil whose kinetic viscosity is equal to or higher than 10 mm<2> / s at 100 DEG C. and lithium complex thickener synthesized from adipic acid. Such construction of the oscillating internal-meshing planetary gear system of the present invention provides a power transmission system using a trochoidal tooth profile gear and a circular-arc tooth profile gear that enables to realize a long life and keeping a high efficiency, even without applying grease containing sodium nitrite.

Description

technical field [0001] The present invention relates to an oscillating internal meshing planetary gear device and a method for improving its durability. Meshing, relating to meshing between gears, transforms sliding contact into rotational contact. Background technique [0002] Conventionally, various power transmission devices are known which transmit, after deceleration or acceleration, input rotation of a motor or the like to a counterpart member. Among them, a power transmission device using a gear having a trochoidal tooth profile and a gear having an arcuate tooth profile has also been known. There are two situations of this kind of power transmission device, that is, the occasion of making the external gear with trochoidal tooth profile and the internal gear with circular arc tooth When an internal gear and an external gear with a circular arc tooth shape (pin) perform oscillating internal meshing. Although in this power transmission device, a gear having a trochoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/32C10M169/02C10M169/06F16H1/28F16H57/04F16H57/08
CPCC10M169/02F16H57/0486F16H57/0464C10N2240/04C10M2203/1025C10M169/06C10N2210/01C10N2230/72C10N2220/022F16H1/32C10N2230/64C10M2207/1236C10N2010/02C10N2020/02C10N2040/04C10N2030/64C10N2030/72F16H1/28
Inventor 岛田真弘
Owner SUMITOMO HEAVY IND LTD