CN1173445A - 顶拉前变速器 - Google Patents

顶拉前变速器 Download PDF

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Publication number
CN1173445A
CN1173445A CN97113948A CN97113948A CN1173445A CN 1173445 A CN1173445 A CN 1173445A CN 97113948 A CN97113948 A CN 97113948A CN 97113948 A CN97113948 A CN 97113948A CN 1173445 A CN1173445 A CN 1173445A
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Prior art keywords
connecting rod
fairleader
start arm
change
speed box
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CN97113948A
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CN1144723C (zh
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藤井和浩
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Shimano Inc
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Shimano Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/131—Front derailleurs
    • B62M9/136—Chain guides; Mounting thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/131—Front derailleurs
    • B62M9/134—Mechanisms for shifting laterally
    • B62M9/1342—Mechanisms for shifting laterally characterised by the linkage mechanisms

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Transmission Devices (AREA)

Abstract

一种脚踏车变速器包括一基件、一导链器、一内连杆、一外连杆、一偏向装置与一启动臂。基件附著一脚踏车架。导链器引导一链条从脚踏车架向内及向外横伸。内连杆有第一端可枢转的连接基件与第二端连接导链器。外连杆有第一端可枢转的连接基件与第二端连接导链器。偏向装置迫使导链器往外横伸。启动臂被固定至外连杆而一齐移动且往外横伸,以致往上拉启动臂使导链器往外横伸。

Description

顶拉前变速器
本发明关於脚踏车变速器，更特定的说，关於藉往上拉启动臂而操作的前变速器。
第5104358号美国专利揭示一种藉往上拉启动臂而操作的前变速器。该专利所示的变速器包括一基件、一内连杆、一外连杆与一可动件，该基件附著脚踏车架的座管，该可动件有导链器。这些元件形成平行四边形的缩放仪连杆机构，它被弹簧向上推而使导链器回到多齿盘链轮组的最小齿盘。一支启动臂从内连杆的上端往外伸，以致启动臂被往上拉时导链器往外移横移。
在这型变速器中，启动臂伸过外连杆并且末端有一变速器线固定杆。因为启动臂从内连杆伸至其他变送器元件，泥与屑可能卡在这些元件之间而影响变速表现。此外，启动臂与其他元件的贴近使启动臂难以清洗。这接著可能增加元件的锈、摩擦与磨损。因元件间缺空隙所引起的问题可藉增加元件间的空隙而获得某种程度的解决。然而，不能任意增加元件间之空隙以防止此类问题，因为启动臂与连杆间的纵向距离增加，在启动臂与连杆间的不要的扭力矩随之增加。
本发明关於一种藉往上拉启动臂而操作的前变速器前变速器，但其中的启动臂不增加维修困难，且在更特定的实施例中，不在其他元件上产生不要的扭力矩。在本发明的一实施例中，一脚踏车前变速器包括一基件、一导链器、一内连杆、一外连杆、偏向装置与一启动臂。基件附著脚踏车架。导链器引导链条从脚踏车往内及往外横移。内连杆有第一端可枢转的连接基件与第二端连接导链器。外连杆有第一端可枢转的连接基件与第二端连接导链器。偏向装置使导链器往内移。启动臂被固定至外连杆，以致二者一齐移动。启动臂从外连杆往外移而往外拉启动臂而造成导链器往外移。
第1图是本发明的顶接前变速器的一特定实施例的後面视图；
第2图是第1图所示的变速器的侧面视图；且
第3图是第1图所示的变速器的俯视图。
第1图是本发明的能使链条22在许多链轮(未被显示)间横向移动的顶拉前变速器10的一特定实施例的後面视图。变速器104包括基件14，其有夹元件15(第3图)与螺栓16能以已知的方式使变速器附著座管18或脚踏车的其他结构元件。内连杆26有上端藉枢销30可枢转的连接基件14，且外连杆34有上端藉枢销38可枢转的连接基件14。类似的，内连杆26有下端藉枢销46可枢转的连接固定件42，且外连杆34有下端藉枢销50可枢转的连接固定件42。在此，所谓「内」、「外」、「上」、「下」是相对於第1图所显示与定位的坐管予以定义。
固定件42连接导链器54，其包括内导片58与外导片62。在此实施例中，固定件42与内导片58是一体成型，且内导片58藉上桥件66(第3图)与後桥件70连接外导片62。当被组合在脚踏车上，链条22依第1图所示之方式通过内导片58与外导片62之间。
启动臂74从外连杆34的上端向外横伸，且缆线固定杆80被用以使变速器缆线84的一端固定至启动臂74。在此实施例中，启动臂74与外连杆34形成一体以使启动臂74与外连杆34间之纵向距离缩至最短。此举减少缆线84与外连杆34间的距离所造成的扭力矩。如第3图所示，启动臂从外连杆34偏位一点点，但必要时启动臂74可完全在外连杆34的移动的平面里以消除启动臂74与外连杆34间不要的扭力矩。既然启动臂74从连杆34往外伸，启动臂74不会挤到其他元件，以致泥土不可能累积且外物(例如树枝)不可能陷在里面。启动臂74还容易清洗。在此实施例中，缆线固定杆80被设在启动74的自由端上，而不往外横伸到外导片62以外。此举避免缆线固定杆80干扰骑士的脚。
弹簧90(第2图)被设在枢销38周围而依已知方式压迫导链器54向内。拉变速器缆线84因此使导链器54对抗弹簧90的力而往外横移，且释放变速器缆线84允许导链器54受弹簧90的力而往内横伸。为设定导链器54的移动的范围，内连杆26包括止动器92与94依已知方式选择性分别抵住调整螺杆96与98。
以上描述本发明的各式实施例，但可有许多其他实施而不背离本发明的精神与范畴。举例而言，启动臂74可从外连杆34的任何位置往外伸，且启动臂74与外连杆34不必形成一体。藉此，本发明的范畴不应受限於上述特定结构。取而代之，本发明的真实范畴应由下列申请专利范围决定。虽然标号被用在申请专利范围中以方便参考图式，本发明不因这些标号而受限於图式所示之构造。

Claims (7)

1.一种脚踏车变速器，其包括：
A.一基件(14)，其附著一脚踏车架(18)；
B.一导链器(54)，其引导一链条(22)从脚踏车架(18)向内及向外横伸；
C.一内连杆(26)，其有第一端可枢转的连接基件(14)与第二端连接导链器(54)；
D.一外连杆(34)，其有第一端可枢转的连接基件(14)与第二端连接导链器(54)；
E.偏向装置(90)，其迫使导链器(54)往外横伸；
F.一启动臂(74)，其被固定至外连杆(34)而一齐移动且往外横伸，以致往上拉启动臂(74)使导链器(54)往外横伸。
2.如权利要求1所述之变速器，其中外连杆(34)绕基件(14)枢转在枢转位置(38)，且其中启动臂(74)从枢转位置(38)伸出。
3.如权利要求1所述之变速器，其中内连杆(26)藉第一枢销(30)而可枢转的连接基件(14)，其中外连杆(34)藉第二枢销(38)而可枢转的连接基件(14)，且其中该启动臂(74)从第二枢销(38)伸出。
4.如权利要求3所述之变速器，其中内连杆(26)的第二端可枢转的连接导链器(54)，且其中内连杆(34)的第二端可枢转的连接导链器(54)。
5.如权利要求4所述之变速器，其中导链器(54)包括：
A.一内导片(58)；
B.一外导片(62)；
C.一跨接件(66、70)，其居中连接内导片(58)与外导片(62)；与
D.一固定件(42)，其连接内导片(58)、内连杆(26)与外连杆(34)。
6.如权利要求5所述之变速器，其中启动臂(74)往外横伸不超过外导片(62)。
7.如权利要求6所述之变速器，其还包括一缆线固定杆(80)被设在启动臂(74)的自由端，其中缆线固定杆(80)往外横伸不超过外导片(62)。
CNB971139482A 1996-06-19 1997-06-19 顶拉前变速器 Expired - Fee Related CN1144723C (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US666001 1996-06-19
US08/666,001 US5779581A (en) 1996-06-19 1996-06-19 Top pull front derailleur
US666,001 1996-06-19

Publications (2)

Publication Number Publication Date
CN1173445A true CN1173445A (zh) 1998-02-18
CN1144723C CN1144723C (zh) 2004-04-07

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US (1) US5779581A (zh)
EP (1) EP0814016B1 (zh)
JP (1) JP3504824B2 (zh)
CN (1) CN1144723C (zh)
DE (1) DE69719862T2 (zh)
TW (1) TW423453U (zh)

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CN100465061C (zh) * 2004-06-23 2009-03-04 株式会社岛野 自行车用前拨链器

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Also Published As

Publication number Publication date
EP0814016A1 (en) 1997-12-29
US5779581A (en) 1998-07-14
DE69719862T2 (de) 2004-02-19
DE69719862D1 (de) 2003-04-24
EP0814016B1 (en) 2003-03-19
JPH1053187A (ja) 1998-02-24
TW423453U (en) 2001-02-21
JP3504824B2 (ja) 2004-03-08
CN1144723C (zh) 2004-04-07

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