JP2004108468A - Shift mechanism for manual transmission - Google Patents

Shift mechanism for manual transmission Download PDF

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Publication number
JP2004108468A
JP2004108468A JP2002271105A JP2002271105A JP2004108468A JP 2004108468 A JP2004108468 A JP 2004108468A JP 2002271105 A JP2002271105 A JP 2002271105A JP 2002271105 A JP2002271105 A JP 2002271105A JP 2004108468 A JP2004108468 A JP 2004108468A
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Prior art keywords
shift
shaft
select shaft
axis
select
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JP2002271105A
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JP4255104B2 (en
Inventor
Hajime Shimoda
下田　肇
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Aisin AI Co Ltd
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Aisin AI Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect

Abstract

<P>PROBLEM TO BE SOLVED: To improve an operating feeling without causing faults such as the slip-off of a gear due to the amplified vibration of a shift lever in a shift mechanism for a manual transmission. <P>SOLUTION: A plurality of spur gears 12a vertical to the axis direction of a shift and select shaft 12 accommodated in a casing 10 of the shift mechanism for the manual transmission are formed at equal spaces on the outer periphery of the shaft 12. A connecting shaft 15 extended vertically to the shift and select shaft is also supported in the casing rotatably around an axis. A plurality of spur gears 15a parallel with the axis and meshed with the spur gears of the shift and select shaft are formed at equal spaces on the outer periphery of the intermediate part of the connecting shaft. The connecting shaft is rotated around the axis being driven through the spur gears only when the shift and select shaft is axially displaced. An inertial body 16 is fixed to the intermediate part of the connecting shaft. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば車両等に搭載される手動変速機のシフト機構に関する。
【０００２】
【従来の技術】
従来、この種の装置は、シフトレバーによりセレクト操作及びシフト操作されて前記セレクト操作時に軸線回りに回動し前記シフト操作時に軸線方向に変位するシフトアンドセレクトシャフトをケーシング内に収容してなり、同シフトアンドセレクトシャフトの回動及び変位によって複数のフォークシャフトのうちから一つを選択して変位させるようになっている。この場合、シフトレバーの先端に慣性体を固定して、操作感を向上させるようにしたものがあった。
【０００３】
【発明が解決しようとする課題】
上記シフトレバーの先端に慣性体を設けた従来装置においては、例えば同装置を搭載した車両の加減速時などに、慣性体に加わる慣性力によりシフトレバーが振動してギア抜けなどの不具合が生じることがあった。
【０００４】
【発明の概要】
本発明の目的は、シフトレバーの振動を増長してギア抜けなどの不具合を生じさせることなく操作感を向上させる手動変速機のシフト機構を提供することにある。
【０００５】
本発明の構成上の特徴は、セレクト操作及びシフト操作されて前記セレクト操作時に軸線回りに回動し前記シフト操作時に軸線方向に変位するシフトアンドセレクトシャフトをケーシング内に収容してなり、同シフトアンドセレクトシャフトの回動及び変位によって複数のフォークシャフトのうちから一つを選択して変位させるようにした手動変速機のシフト機構において、シフトアンドセレクトシャフトの中間部外周上に同シフトアンドセレクトシャフトの軸線方向と垂直な複数のすぐ歯を等間隔に形成し、シフトアンドセレクトシャフトに対して垂直方向に延設されてケーシング内にて軸線周りに回動可能に支持されてなり中間部外周上に等間隔に形成した軸線と平行な複数のすぐ歯にてシフトアンドセレクトシャフトのすぐ歯と噛み合いシフトアンドセレクトシャフトの軸方向の変位時にのみ前記すぐ歯を介して駆動されて軸線周りに回動する連結シャフトを設け、連結シャフトに慣性体を固定したことにある。これによれば、シフトアンドセレクトシャフトが軸線方向に変位するとき、慣性体に発生する慣性力が連結シャフトを介して同変位に対し補助力として働くことにより、レバー上荷重が低減し操作感が向上する。この場合、慣性体はケーシング内に支持された連結シャフトに固定されているため、シフトレバーの振動を増長してギア抜けなどの不具合を生じることもない。
【０００６】
【発明の実施の形態】
以下、本発明の一実施形態について図面を参照して説明する。この手動変速機のシフト機構は、図１に示すように、手動変速機のケーシング１０内にて、シフトレバー１１により操作されるシフトアンドセレクトシャフト１２を備えている。シフトアンドセレクトシャフト１２は、シフトレバー１１のセレクト操作時に軸線回りに回動し、シフトレバー１１のシフト操作時に軸線方向に変位する。シフトアンドセレクトシャフト１２には、レバー１３が固定されている。レバー１３は、シフトレバー１１のセレクト操作時すなわちシフトアンドセレクトシャフト１２の軸線周りの回動時に複数のフォークシャフト１４ａ〜１４ｄのうちの一つと選択的に係合し、シフトレバー１１のシフト操作時すなわちシフトアンドセレクトシャフト１２の軸線方向の変位時に前記係合したフォークシャフト１４ａ〜１４ｄを変位させる。シフトアンドセレクトシャフト１２の中間部外周上には、シフトアンドセレクトシャフト１２の軸線方向と垂直な複数のすぐ歯１２ａが等間隔に形成されている。
【０００７】
ケーシング１０内には、連結シャフト１５も収容されている。連結シャフト１５は、シフトアンドセレクトシャフト１２に対して垂直方向に延設されて、ケーシング１０内にて軸線回りに回動可能に支持されている。連結シャフト１５の中間部外周上には、シフトアンドセレクトシャフト１２のすぐ歯１２ａと噛み合う軸線と平行な複数のすぐ歯１５ａが等間隔に形成されている。これにより、連結シャフト１５は、シフトアンドセレクトシャフト１２の軸線方向の変位時にのみすぐ歯１５ａを介して駆動されて軸線周りに回動するようになっている。連結シャフト１５の中間部には、慣性体１６が固定されている。
【０００８】
上記のように構成した手動変速機のシフト機構においては、シフトアンドセレクトシャフト１２が軸線方向に変位するとき、慣性体１６に発生する慣性力が連結シャフト１５を介して同変位に対し補助力として働くことにより、レバー上荷重が低減し操作感が向上する。この場合、慣性体１６はケーシング１０内に支持された連結シャフト１５に固定されているため、シフトレバー１２の振動を増長してギア抜けなどの不具合を生じることもない。また、各シャフト１２，１５のすぐ歯１２ａ，１５ａを形成した位置の径の比ｄ２／ｄ１を下げることにより各すぐ歯１２ａ，１５ａ間のギア比を下げることが可能であるため、操作感を良好に保ちながら慣性体１６を小さく形成して当該手動変速機を小型に形成することが可能である。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る手動変速機の上部縦断面図である。
【図２】（ａ）、（ｂ）はそれぞれ図１のシフトアンドセレクトシャフト及び連結シャフトの拡大側面図及び平面図である。
【符号の説明】
１０…ハウジング、１１…シフトレバー、１２…シフトアンドセレクトシャフト、１２ａ…すぐ歯、１４ａ〜１４ｄ…フォークシャフト、１５…連結シャフト、１５ａ…すぐ歯、１６…慣性体。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shift mechanism of a manual transmission mounted on, for example, a vehicle.
[0002]
[Prior art]
Conventionally, this type of device has a shift and select shaft housed in a casing, which is operated by a shift lever for a select operation and a shift operation, rotates around an axis during the select operation, and is displaced in an axial direction during the shift operation, One of a plurality of fork shafts is selected and displaced by rotation and displacement of the shift and select shaft. In this case, an inertial body is fixed to the tip of the shift lever to improve the operational feeling.
[0003]
[Problems to be solved by the invention]
In a conventional device in which an inertial body is provided at the tip of the shift lever, for example, during acceleration or deceleration of a vehicle equipped with the device, the inertia force applied to the inertial body causes the shift lever to vibrate, thereby causing a problem such as gear removal. There was something.
[0004]
Summary of the Invention
SUMMARY OF THE INVENTION An object of the present invention is to provide a shift mechanism of a manual transmission in which the vibration of a shift lever is increased to improve the operational feeling without causing a problem such as gear disengagement.
[0005]
A structural feature of the present invention is that a shift and select shaft that is rotated around an axis during the select operation and the shift operation by the select operation and is displaced in the axial direction during the shift operation is housed in a casing, In a shift mechanism of a manual transmission in which one of a plurality of fork shafts is selected and displaced by rotation and displacement of an AND select shaft, the shift and select shaft is disposed on an outer periphery of an intermediate portion of the shift and select shaft. A plurality of straight teeth perpendicular to the axis direction of the shaft are formed at equal intervals, are extended vertically to the shift and select shaft, and are supported rotatably around the axis in the casing. Meshes with the shift and select shaft's straight teeth with a plurality of straight teeth parallel to the axis formed at equal intervals A connecting shaft that rotates said only when the shift-and-select shaft in the axial displacement is driven through the immediately teeth about the axis provided, lies in fixing the inertial body to the connecting shaft. According to this, when the shift and select shaft is displaced in the axial direction, the inertial force generated in the inertial body acts as an auxiliary force for the displacement via the connecting shaft, so that the load on the lever is reduced and the operational feeling is reduced. improves. In this case, since the inertial body is fixed to the connecting shaft supported in the casing, the vibration of the shift lever is increased, and there is no occurrence of a problem such as gear missing.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the shift mechanism of the manual transmission includes a shift and select shaft 12 operated by a shift lever 11 in a casing 10 of the manual transmission. The shift and select shaft 12 rotates around the axis when the shift lever 11 is selected, and is displaced in the axial direction when the shift lever 11 is shifted. A lever 13 is fixed to the shift and select shaft 12. The lever 13 selectively engages with one of the plurality of fork shafts 14a to 14d when the shift lever 11 is selected, that is, when the shift and select shaft 12 rotates around the axis, and when the shift lever 11 is shifted. That is, when the shift and select shaft 12 is displaced in the axial direction, the engaged fork shafts 14a to 14d are displaced. A plurality of straight teeth 12 a perpendicular to the axial direction of the shift and select shaft 12 are formed at equal intervals on the outer periphery of the intermediate portion of the shift and select shaft 12.
[0007]
The connection shaft 15 is also housed in the casing 10. The connection shaft 15 extends in a direction perpendicular to the shift and select shaft 12 and is supported in the casing 10 so as to be rotatable around an axis. On the outer periphery of the intermediate portion of the connection shaft 15, a plurality of straight teeth 15a parallel to an axis meshing with the straight teeth 12a of the shift and select shaft 12 are formed at equal intervals. Thus, the coupling shaft 15 is driven via the teeth 15a only immediately when the shift and select shaft 12 is displaced in the axial direction, and rotates around the axis. An inertia body 16 is fixed to an intermediate portion of the connection shaft 15.
[0008]
In the shift mechanism of the manual transmission configured as described above, when the shift and select shaft 12 is displaced in the axial direction, the inertial force generated in the inertia body 16 is provided as an auxiliary force to the displacement via the connecting shaft 15. By working, the load on the lever is reduced and the operational feeling is improved. In this case, since the inertial body 16 is fixed to the connection shaft 15 supported in the casing 10, the vibration of the shift lever 12 is increased, so that a problem such as a gear dropout does not occur. Further, the gear ratio between the immediate teeth 12a and 15a can be reduced by reducing the ratio d2 / d1 of the diameters of the positions where the immediate teeth 12a and 15a of the shafts 12 and 15 are formed. The inertia body 16 can be formed small while maintaining good conditions, so that the manual transmission can be formed small.
[Brief description of the drawings]
FIG. 1 is an upper longitudinal sectional view of a manual transmission according to an embodiment of the present invention.
FIGS. 2A and 2B are an enlarged side view and a plan view of a shift and select shaft and a connection shaft of FIG. 1, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... Shift lever, 12 ... Shift and select shaft, 12a ... Immediate teeth, 14a-14d ... Fork shaft, 15 ... Connection shaft, 15a ... Immediate teeth, 16 ... Inertial body.

Claims (1)

シフトレバーによりセレクト操作及びシフト操作されて前記セレクト操作時に軸線回りに回動し前記シフト操作時に軸線方向に変位するシフトアンドセレクトシャフトをケーシング内に収容してなり、同シフトアンドセレクトシャフトの回動及び変位によって複数のフォークシャフトのうちから一つを選択して変位させるようにした手動変速機のシフト機構において、
前記シフトアンドセレクトシャフトの中間部外周上に同シフトアンドセレクトシャフトの軸線方向と垂直な複数のすぐ歯を等間隔に形成し、
前記シフトアンドセレクトシャフトに対して垂直方向に延設されて前記ケーシング内にて軸線周りに回動可能に支持されてなり、中間部外周上に等間隔に形成した軸線と平行な複数のすぐ歯にて前記シフトアンドセレクトシャフトのすぐ歯と噛み合い前記シフトアンドセレクトシャフトの軸線方向の変位時にのみ前記すぐ歯を介して駆動されて軸線周りに回動する連結シャフトを設け、
前記連結シャフトに慣性体を固定したことを特徴とする手動変速機のシフト機構。A shift and select shaft, which is operated by a shift lever and is shifted around the axis during the select operation by the shift operation and is displaced in the axial direction during the shift operation, is accommodated in a casing, and the shift and select shaft is rotated. And in a shift mechanism of a manual transmission, wherein one of a plurality of fork shafts is selected and displaced by displacement.
A plurality of immediate teeth perpendicular to the axial direction of the shift and select shaft are formed at equal intervals on the outer periphery of the intermediate portion of the shift and select shaft,
A plurality of straight teeth extending in a direction perpendicular to the shift and select shaft and rotatably supported around the axis in the casing, and formed at equal intervals on the outer periphery of the intermediate portion and parallel to the axis. A coupling shaft that meshes with the immediate teeth of the shift and select shaft and is driven via the immediate teeth only when the shift and select shaft is displaced in the axial direction, and rotates around the axis;
A shift mechanism for a manual transmission, wherein an inertial body is fixed to the connection shaft.
JP2002271105A 2002-09-18 2002-09-18 Manual transmission shift mechanism Expired - Fee Related JP4255104B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006177489A (en) * 2004-12-24 2006-07-06 Toyota Motor Corp Shift mechanism of transmission
JP2008128303A (en) * 2006-11-17 2008-06-05 Aisin Ai Co Ltd Shift lever device for transmission
JP2008175389A (en) * 2007-01-10 2008-07-31 Teleflex Automotive France Sas Device for controlling gearbox
DE102012001387A1 (en) 2011-01-27 2012-08-02 Aisin Ai Co., Ltd. Actuation device of a switching mechanism in a manual transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006177489A (en) * 2004-12-24 2006-07-06 Toyota Motor Corp Shift mechanism of transmission
JP2008128303A (en) * 2006-11-17 2008-06-05 Aisin Ai Co Ltd Shift lever device for transmission
JP2008175389A (en) * 2007-01-10 2008-07-31 Teleflex Automotive France Sas Device for controlling gearbox
DE102012001387A1 (en) 2011-01-27 2012-08-02 Aisin Ai Co., Ltd. Actuation device of a switching mechanism in a manual transmission

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