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Three speed gearbox from single planetary gearset

A planetary gear set, technology of planetary gears, used in vehicle gearboxes, elements with teeth, gear transmissions, etc.

Inactive Publication Date: 2013-06-19
LIMO REID INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reverse ratio is the same as low gear

Method used

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  • Three speed gearbox from single planetary gearset
  • Three speed gearbox from single planetary gearset
  • Three speed gearbox from single planetary gearset

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Embodiment Construction

[0015] The following detailed description and drawings describe and illustrate various exemplary embodiments of the invention. These descriptions and drawings are intended to enable those skilled in the art to make and use the present invention, but are not intended to limit the scope of the present invention in any way. With respect to the disclosed methods, the steps presented are exemplary in nature, and thus the order of the steps is not necessary or critical.

[0016] The preferred embodiment of the present invention is in figure 1 , figure 2 with Figure 5 is shown in , and includes a planetary gear set 10 for use with a reversible prime mover 11 . Prime mover 11 may be any bi-directional motor including, but not limited to, an electric motor or a hydraulic motor. Where the prime mover 11 is a hydraulic motor, an accumulator 50 may be provided for accumulating energy during back driving as described below.

[0017] refer to figure 2 , the input hub 12 is spline-c...

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Abstract

The present invention is a three forward speed gearbox with reverse from a single planetary gearset 10. The forward speed ratios include a low gear, one to one, and overdrive. The reverse gear ratio is identical with the low gear. Forward rotation of the output shaft 28 in first gear is accomplished by reversing the direction of the input motor. This is easily achieved from a bi-directional prime mover 11 such as a hydraulic motor or electric motor. Another advantage of using a bi-directional prime mover 11 is that the bi-directional rotation of the input hub 12 provides forward, reverse and back drive to accumulate energy in an accumulator 50.

Description

technical field [0001] The present application generally relates to improvements in automatic transmissions for motor vehicles. In particular, the present invention relates to new improvements in drive transmissions in hybrid vehicles. Background technique [0002] Planetary gear sets have three gear ratios and seven unique combinations with drive direction / ratio, including direct drive. The transmission ratio is determined by the gears in the gear set and selected by varying the input and output members while the third member is fixed. In practice, clutches and belts transmit power or inhibit rotation of individual elements in a planetary gear set. But only two forward gears and one reverse gear are obtained with a single planetary gear set. Automatic transmissions in vehicles typically employ dual planetary gear sets or compound planetary gear sets, which have one ring gear but two sun gears, and each planetary gear set uses two belts and four clutches to obtain transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/78
CPCF16H3/54F16H2200/0039
Inventor J·A·奥布里恩G·J·弗兰克
Owner LIMO REID INC