Reduction gear for natural energy recovery system

Abstract

The present invention provides a reduction gear for a natural energy recovery system, which improves the impact resistance in a radial direction and prevent the transmission of radial load caused by external force to a speed reduction mechanism. In the reduction gear (G1) used in a natural energy recovery system, at a part of the reduction gear (G1), which is more next to the output side comparedwith the speed reduction mechanisms (40, 41), an output shaft (32) is supported by a first bearing (68) at the side of the speed reduction mechanisms (40, 41) and a second bearing (70) at the opposite side of the speed reduction mechanisms. Furthermore a shaft diameter (d1) of the part of output shaft (32), which is supported by the first bearing (68), is formed larger than the shaft diameter (d2) of the part that is supported by the second bearing (70).

Description

technical field [0001] This application claims priority based on Japanese Patent Application No. 2009-63621 filed on March 16, 2009. All the content of the application is used in this specification by reference. [0002] The invention relates to a deceleration device for a natural energy recovery system. Background technique [0003] According to Patent Document 1, it is shown in Figure 8 The speed reducer 502 used in the yaw drive device 500 of the wind power generation apparatus shown as an example of the natural energy recovery system is shown. The speed reducer 502 includes a first-stage reduction unit 510 , a second-stage reduction unit 520 connected to the first-stage reduction unit 510 , and a third-stage reduction unit 530 connected to the second-stage reduction unit 520 . [0004] The second-stage reduction unit 520 is constituted by a spur gear type reduction mechanism including an input spur gear 521 connected to the first carrier 507 of the planetary reduction...

AI Technical Summary

Problems solved by technology

[0007] However, in the case of reduction gears for systems that recover natural energy, unexpected large loads (radial loads) may be applied from the output side due to wind forces such as high winds and typhoons.

At this time, in the conventional structure, the bearing 544 that receives the radial load is located closer to the motor side than the third reduction mechanism 530 in the final stage, and the large radial load passes through the third reduction mechanism 530, and the third reduction mechanism 530 Mechanism 530 may be damaged, etc.

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