Gear noise preventing device for manual transmission

A manual transmission, noise prevention technology, applied in the direction of transmission control, belt/chain/gear, elements with teeth, etc., can solve the problems of increasing the operating load of the shift lever and excessively increasing the stroke of the pre-blocking fork shaft, etc. To achieve the effect of preventing gear noise, suppressing the increase of operating load, and good operating feeling

Active Publication Date: 2009-08-19
AISIN AI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may unnecessarily increase the operating load on the selector lever
In addition, when the above mechanism is provided, there is a possibility that the stroke of the yoke shaft may increase excessively

Method used

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  • Gear noise preventing device for manual transmission
  • Gear noise preventing device for manual transmission
  • Gear noise preventing device for manual transmission

Examples

Experimental program
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Embodiment Construction

[0043] Embodiments of the present invention will be described below with reference to the accompanying drawings. The present invention will be described in the case of applying the present invention to a synchromesh manual transmission having six forward gears and one reverse gear mounted on a front engine front drive (FF) vehicle.

[0044] figure 1 is a side view of the gear arrangement of the manual transmission according to the present embodiment, in which a part of the gear arrangement is shown in section. figure 1 The gear arrangement shown is housed in a transmission housing (not shown). Input shaft 1, output shaft 2 and reverse shaft 3 (in figure 1 shown by double-dashed lines) are arranged parallel to each other and are rotatably supported by the transmission case.

[0045] The input shaft 1 is coupled to a crankshaft (not shown) of the engine via a clutch mechanism. When the clutch mechanism is engaged, the rotational driving force of the engine is input to the in...

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PUM

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Abstract

A gear noise preventing device is formed so that, at the time of a reverse gear shift operation, in accordance with a select operation of a shift lever, a first head (61) that rotates integrally with a shift select shaft (20) rotates a second head (62) supported on a third and fourth fork shaft (52), the rotational force of the second head (62) is transmitted to a third head (63) formed integrally with a fifth and sixth fork shaft (53) to axially move the fifth and sixth fork shaft (53). The gear noise preventing device further includes a coil spring (71) that urges the second head (62) in a direction that coincides with a direction in which the fifth and sixth fork shaft (53) moves; and a snap ring (72) that restricts a stroke by which the second head (62) is moved by an urging force of the coil spring (71).

Description

technical field [0001] The present invention relates to a gear noise prevention device used for, for example, a manual transmission mounted on a vehicle or the like. More specifically, the present invention relates to a method for preventing gear noise when shifting to reverse gear in a manual transmission having no synchronizer (synchromesh mechanism) on the reverse gear. Background technique [0002] In the prior art, many vehicle manual transmissions typically have synchronizers on the forward gears and no synchronizers on the reverse gears. This is because of the following reasons. The reverse gear shifting operation from forward gear to reverse gear is usually performed when the clutch is disengaged and the vehicle is stopped. Therefore, both the reverse drive gear provided on the input shaft of the transmission and the reverse driven gear provided on the intermediate shaft (also referred to as "output shaft" in the case of FF vehicles) stop rotating, and thus, The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/20F16H63/24
CPCF16H63/302F16H63/3408F16H63/22F16H2063/3086
Inventor 武内博明藤井昭广西村滋人
Owner AISIN AI CO LTD
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