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Geared transmission unit

A technology of gear transmission and pinion, which is applied in the direction of gear transmission, transmission, transmission parts, etc., and can solve problems such as limitation, limitation of the number of planetary gears, and restriction of the number of planetary gears

Inactive Publication Date: 2018-11-13
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as in the gear transmission described in Patent Document 1, for a compound planetary gear mechanism in which two sets of planetary gear mechanisms are connected by a common ring gear, the number of planetary gears is affected by the number of teeth and the inner diameter of the ring gear as an internal gear. restrict
Therefore, in the gear transmission described in Patent Document 1, considering the miniaturization and weight reduction of the device, the number of planetary gears is limited by the number of teeth and the inner diameter of the ring gear.
As a result, increasing the reduction ratio is also limited

Method used

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Examples

Experimental program
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Embodiment Construction

[0063] exist figure 1 An overview of a gear transmission to which the present invention is applied is shown in . The gear transmission 1 in the embodiment of the present invention typically includes an input shaft 2 , an output shaft 3 , and a planetary gear mechanism 4 . The gear transmission 1 further includes a counter gear set 5 connected to the input shaft 2 or the output shaft 3 , and an external gear set 6 that transmits torque between the planetary gear mechanism 4 and the counter gear set 5 . Furthermore, this gear transmission 1 decelerates or speeds up the rotational speed between the input shaft 2 and the output shaft 3 , and transmits the torque input to the input shaft 2 to the output shaft 3 . That is, the gear transmission 1 is configured as a reduction mechanism or a speed-up mechanism.

[0064] The planetary gear mechanism 4 has a sun gear 7 , a ring gear 8 , and a carrier 9 as three rotating elements that rotate differentially with each other. In addition...

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Abstract

The invention provides a geared transmission unit that can increase a speed increasing or reducing ratio without increasing a size of the geared transmission unit. In the geared transmission unit which has an input shaft, an output shaft, and a planetary gear mechanism, and decelerates the rotational speed between the input shaft and the output shaft to transmit torque, an external gear is formedon an outer peripheral portion of the ring gear. The geared transmission unit, includes: a planetary gear set; an external gear formed around a ring gear; a center gear that rotates with the sun gear;a sun gear shaft that rotates with the center gear and the sun gear; a carrier shaft that rotates with the carrier; a first pinion that engages with the external gear; a second pinion that rotates with the first pinion; a pinion shaft that rotates with the first and second pinion; and a counter gear that engages with the center gear and the second pinion. The sun gear shaft or the pinion shaft serves as the input shaft, and the carrier shaft serves as the output shaft.

Description

technical field [0001] The present invention relates to a gear transmission that uses a planetary gear mechanism to transmit power. Background technique [0002] Conventionally, gear transmissions that perform deceleration or speed up using a planetary gear mechanism are known. Furthermore, there is also known a compound planetary gear mechanism in which a plurality of planetary gear mechanisms are combined in order to obtain a high reduction ratio or a high speed increase ratio. An example of a gear transmission using such a planetary gear mechanism is described in Patent Document 1. The gear transmission described in this Patent Document 1 is constituted as a high speed reduction mechanism by a compound planetary gear mechanism in which two sets of planetary gear mechanisms, namely a first planetary gear mechanism and a second planetary gear mechanism, are combined. . The first planetary gear mechanism has a first sun gear, a first ring gear, and a first carrier as thre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H1/32F16H57/023
CPCF16H1/32F16H57/023F16H3/721F16H37/0833F16H2200/2005F16H37/0826F16H1/46F16H2001/2881F16H48/10F16H37/041
Inventor 矶野宏
Owner TOYOTA JIDOSHA KK