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Continuously variable planetary transmission

A planetary transmission, variable technology, applied in the field of drive train, can solve problems such as changing the transmission ratio, achieve the effect of high energy efficiency and increase cost

Inactive Publication Date: 2017-02-22
UNIVERSITE CATHOLIQUE DE LOUVAIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not possible to change the gear ratio while the input to the transmission is static

Method used

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  • Continuously variable planetary transmission
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Examples

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Embodiment Construction

[0053] figure 1 A continuously variable planetary transmission 10 (or transmission 10 ) of the present invention is schematically shown according to a preferred embodiment. It comprises sun gear 1 or sun gear member or sun gear component or sun gear mechanism. Preferably, the sun gear 1 includes a sun shaft and a sun gear. Thus, in some preferred embodiments, the sun shaft may be either the output shaft or the input shaft of the transmission 10 . The transmission 10 also includes a planet carrier 4 or a planet carrier component or a planet carrier part or a planet carrier mechanism. Preferably, this planet carrier 4 is connected to a transmission shaft or an electric motor. In this case, the planet carrier 4 is therefore the input to the transmission 10 . However, in another preferred embodiment the planet carrier 4 may be connected to the output.

[0054] The transmission 10 also includes a first planetary gear 21 . This first planet wheel 21 has a first rotational axis...

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Abstract

Transmission (10) comprising a sun (1), a planet carrier (4), a first planet (21) having a first axis of revolution (41) and a first lateral surface (31) that is nonparallel to it, and a ring (3). When there is a relative movement between said first planet (21) and said ring (3) for a constant transmission ratio, a force of power transmission, Formula (I), between said first planet (21) and said ring (3) defines a plane (55). The transmission (10) comprises rolling means (15) for allowing a movement of translation between said ring (3) and said first planet (21) along a direction of translation (65) that is perpendicular to said plane (55) such that different transmission ratios can be obtained, corresponding to different coupling points (8) between said first lateral surface (31) and said ring (3) along said direction of translation (65).

Description

technical field [0001] The present invention relates to continuously variable transmissions or continuously variable drive trains. More specifically, the present invention relates to continuously variable transmissions of the planetary or epicyclic gear type. Background technique [0002] US2013 / 0296096A1 discloses a continuously variable transmission. In this drive train, there are two input discs coupled to the input shaft and separated by an output disc. Rollers are provided between each input and output disc for allowing coupling between the input and output discs. Variation of the transmission ratio is achieved by varying the orientation of the rollers relative to the input shaft and relative to the input and output discs. Complex mechanisms including, for example, hydraulic reaction pistons are required to change the orientation of the rolls in an efficient and robust manner. The prices for this establishment are high. In order to allow efficient torque transmissi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H15/52A61F2/42A61F2/66F16H3/66
CPCA61F2/4202A61F2/6607F16H3/66F16H15/52A61F2002/6836F16H15/18F16H37/08F16H37/0853F16H3/46F16H15/506F16H37/022
Inventor C·埃费拉茨B·德埃R·龙泽
Owner UNIVERSITE CATHOLIQUE DE LOUVAIN
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