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A transmission

A technology of transmission and driving components, which is applied in the direction of vehicle gearbox, gear transmission, transmission control, etc., which can solve the impractical problems of limited space and achieve the effect of avoiding locking

Active Publication Date: 2019-01-04
QINETIQ LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Q-shift gearbox becomes longer due to the increased number of selectable gear ratios, which may be impractical for implementation in some vehicles due to the limited space to accommodate the transmission

Method used

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Embodiment Construction

[0039] Figure 2a and Figure 2b A vehicle transmission 10 according to a first embodiment of the invention is shown. For ease of understanding, Figure 2a shows the variator with the claw bushings removed, while the Figure 2b The transmission is shown in neutral.

[0040] The transmission 10 has an input shaft 12 , a bridge shaft 14 and an output shaft 16 arranged parallel to one another. The input shaft 12 supports first to third gears 18a, 20a, and 22a, which gradually increase in diameter from left to right. The bridge shaft 14 supports the first-stage gear 18b and the second-stage gear 20b 1 , third stage gear 20b 2 and the fourth stage gear 22b, wherein the fourth stage gear 22b is a compound gear. The fourth stage gear 22b has a first portion 22b 1 , which has a ratio of the second part 22b 2 small diameter. The output shaft 16 supports first to third gears 18c, 20c, 22c, whose diameter gradually increases from left to right. The torque input and output char...

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PUM

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Abstract

A Transmission A transmission (10) comprising a plurality of shafts (12,14,16) each carrying a plurality of drive members(18a, 18b, 18c, 20a, 20b, 20b 2, 20c, 22a, 22b, 22b 2, 22c), the drive memberson each said shaft arranged to operatively cooperate with those carried by at least one other said shaft for transferring load between a torque input (13) and a torque output (15) of the transmissionin use, the transmission being configured such that respective resultant gear ratios between the torque input and the torque output can be selected in use from each of a plurality of groups thereof bychanging a load path L1 between the torque input and the torque output, wherein each said group of selectable resultant gear ratios has a load path feature for transferring load between a pair of theshafts which is common to the selectable resultant gear ratios within that group.

Description

technical field [0001] The present invention relates to transmissions, and more particularly, though not exclusively, to vehicle transmissions for performing gear changes. Background technique [0002] WO2014 / 049317A1 describes a gearbox known as a Q-shift gearbox, which is herein figure 1 Shown in the figure. The gearbox shown has four selectable gear ratios and is suitable for use in automobiles. Larger vehicles with low power-to-weight ratios, such as vans and trucks, typically require more selectable gear ratios than this. For a Q-shift gearbox with more selectable gear ratios, more gears are required to be coupled to opposing transmission shafts. The Q-shift gearbox becomes longer due to the increased number of selectable gear ratios, which may be impractical for implementation in some vehicles due to the limited space to accommodate the transmission. Aspects of the invention address this issue. Contents of the invention [0003] According to a first aspect of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/091
CPCF16H3/091F16H2200/0065F16H2714/02F16H37/046
Inventor R.W.汤普森
Owner QINETIQ LTD
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