Gear noise preventing system for manual transmission

A manual transmission, noise prevention technology, applied in the direction of belt/chain/gear, elements with teeth, transmission control, etc. The effect of preventing noise

Active Publication Date: 2009-04-29
AISIN AI CO LTD
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult for the selector shaft to withstand the reaction force transmitted from the yoke shaft at the time of operating the reverse shift gear noise prevention mechanism at a sufficient level.
That is, since there is a possibility that the select shaft is moved by the reaction force when the reverse switching gear noise prevention mechanism is operated, it is difficult for the select shaft to withstand the above reaction force
Therefore, it is possible that the amount of pre-resistance fork shaft movement will not be large enough to perform the gear noise prevention function (an amount large enough to operate the synchronization mechanism)
Therefore, there is still room to improve reliability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gear noise preventing system for manual transmission
  • Gear noise preventing system for manual transmission
  • Gear noise preventing system for manual transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] Referring to the accompanying drawings, exemplary embodiments of the present invention will be described in detail below.

[0043] In an embodiment, the present invention is applied to a synchromesh manual transmission having six forward gears and one reverse gear, which is installed in a front-engine front-drive (FF) vehicle.

[0044] Gear arrangement of manual transmission

[0045] FIG. 1 is a side view showing a section of a part of a gear arrangement of a manual transmission according to an embodiment of the present invention. As shown in the gear arrangement in Fig. 1, the input shaft 1, the output shaft 2 and the reverse shaft 3 (marked with a two-dot chain line in Fig. 1) are accommodated in a gearbox (not shown) and arranged parallel to each other , rotatably supported by the gearbox.

[0046] The input shaft 1 is connected to a crankshaft (not shown) of the engine via a clutch mechanism. When the clutch mechanism is engaged, rotational driving force from the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

During a reverse shift operation, in accordance with a select operation performed on a shift lever, a first head (61) that rotates together with a shift select shaft (20) rotates a second head (62) that is supported by a third gear-fourth gear fork shaft (52). A rotational force of the second head (62) is transferred to a third head (63) that is provided integrally onto a fifth gear-sixth gear fork shaft (53) and the fifth gear-sixth gear fork shaft (53) moves in the axial direction. Thus, a synchromesh mechanism operates and the rotation of an input shaft slows down. Then, in accordance witha shift operation performed on the shift lever, the first head (61) retracts from the second head (62) and the operation of the synchromesh mechanism is terminated. During a reverse shift select operation, the synchromesh mechanism for forward gear is operated for a sufficiently long period and by a sufficient amount to reliably prevent gear noise.

Description

technical field [0001] The present invention generally relates to a gear noise prevention system for a manual transmission such as that installed in an automobile. More particularly, the present invention relates to a technique for preventing gear noise from occurring when a manual transmission not equipped with a synchromesh mechanism for reverse gear is shifted into reverse gear. Background technique [0002] Many types of vehicle manual transmissions are not equipped with a synchromesh mechanism for a reverse gear although they are equipped with a synchromesh mechanism for a forward gear, and the reason is as follows. A reverse shift operation for shifting a manual transmission from forward to reverse is typically performed with the clutch disengaged and the vehicle not moving. Therefore, both the reverse drive gear provided on the input shaft of the conversion mechanism and the reverse driven gear provided on the intermediate shaft (which may be referred to as an “outpu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F16H63/20F16H63/34
CPCF16H63/302
Inventor 永井一成内藤浩二
Owner AISIN AI CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap