DE202004006978U1 - Cover disc for bicycle chainwheel is held by expansion clamp inserted axially into hollow crank shaft and expanded radially by screw - Google Patents
Cover disc for bicycle chainwheel is held by expansion clamp inserted axially into hollow crank shaft and expanded radially by screw Download PDFInfo
- Publication number
- DE202004006978U1 DE202004006978U1 DE200420006978 DE202004006978U DE202004006978U1 DE 202004006978 U1 DE202004006978 U1 DE 202004006978U1 DE 200420006978 DE200420006978 DE 200420006978 DE 202004006978 U DE202004006978 U DE 202004006978U DE 202004006978 U1 DE202004006978 U1 DE 202004006978U1
- Authority
- DE
- Germany
- Prior art keywords
- chainring
- cover plate
- bottom bracket
- hollow shaft
- plate according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J13/00—Guards for chain, chain drive or equivalent drive, e.g. belt drive
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Kettenblatt-Abdeckscheibe für eine Tretlagerkurbel mit einer Tretlager-Hohlwelle.The present invention relates to a chainring cover for a bottom bracket crank with a bottom bracket hollow shaft.
Kettenblatt-Abdeckscheiben der gattungsgemäßen Art sind an sich bekannt und dienen dazu, den Kettenblatt-Bereich sowie die in diesem Bereich umlaufende Kette eines Zweirades nach außen hin abzudecken.Chainring cover disks of the generic type are known per se and serve the chainring area as well to cover the chain of a two-wheeler rotating in this area to the outside.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Kettenblatt-Abdeckscheibe der gattungsgemäßen Art so zu gestalten, dass diese schnell und bequem und dennoch sicher montierbar ist.The present invention lies the task of a chainring cover plate of the generic type to be designed in such a way that it is quick and convenient, yet safe is mountable.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Kettenblatt-Abdeckscheibe durch eine in die Tretlager-Hohlwelle eingreifende und durch eine in Richtung der Längsachse der Tretlager-Hohlwelle verlaufende Spannschraube radial in der Trefflager-Hohlwelle aufspreizbare Klemmeinrichtung festlegbar ist.This object is achieved according to the invention solved, that the chainring cover plate through one engaging in the bottom bracket hollow shaft and one in the direction the longitudinal axis of the bottom bracket hollow shaft radial screw in the Impact bearing hollow shaft expandable clamping device can be fixed.
Eine derartige Konstruktion erlaubt es, die Kettenblatt-Abdeckscheibe durch Einstecken der Klemmeinrichtung in die Tretlager-Hohlwelle und durch anziehen der Spannschraube auf einfachste Art und Weise zu montieren. Durch Betätigung der Spannschraube wird die Klemmeinrichtung innerhalb der Tretlager-Hohlwelle radial aufgespreizt und damit sicher in der Tretlager-Hohlwelle verklemmt.Such a construction allows the chainring cover plate by inserting the clamping device into the bottom bracket hollow shaft and by tightening the clamping screw to assemble in the simplest way. By operating the clamping screw the clamping device becomes radial within the bottom bracket hollow shaft spread out and thus securely jammed in the bottom bracket hollow shaft.
Die Klemmeinrichtung besteht vorteilhafterweise aus zwei Zylinderabschnitten, deren einander zugewandte Stirnflächen gegenüber ihrer gemeinsamen Längsachse abgeschrägt verlaufen.The clamping device advantageously consists from two cylinder sections, the facing end faces of which common longitudinal axis bevelled run.
Somit ist die Klemmeinrichtung selbst eine vergleichsweise einfach aufgebaute und dennoch hochwirksame Baugruppe, die preiswert herstellbar ist. Zweckmäßigerweise sind die einander zugewandten Stirnflächen der Zylinderabschnitte gegenüber der gemeinsamen Längsachse um 45° oder nahezu 45° abgeschrägt.Thus, the clamping device itself a comparatively simple structure, yet highly effective Assembly that is inexpensive to manufacture. Conveniently they are each other facing end faces of the cylinder sections opposite the common longitudinal axis by 45 ° or almost 45 ° beveled.
Hierdurch werden beide Zylinderabschnitte beim Anziehen der Spannschraube gleichmäßig und fest gegeneinander radial an die Innenwandung der Tretlager-Hohlwelle angepresst. Damit werden maximale Klemmkräfte erzielt.As a result, both cylinder sections at Tighten the clamping screw evenly and firmly against each other pressed radially against the inner wall of the bottom bracket hollow shaft. So that will be maximum clamping forces achieved.
Die Zylinderabschnitte sind nach einer weiteren Ausführungsform der Erfindung vorteilhafterweise aus Kunststoff gefertigt.The cylinder sections are after a further embodiment the invention advantageously made of plastic.
Auch die Kettenblatt-Abdeckscheibe ist vorteilhafterweise aus Kunststoff hergestellt.Also the chainring cover plate is advantageously made of plastic.
Eine besonders bevorzugte Ausführungsform der Erfindung sieht vor, dass die Kettenblatt-Abdeckscheibe mit dem ihr unmittelbar zugewandten Zylinderabschnitt der Klemmeinrichtung einstückig hergestellt ist.A particularly preferred embodiment the invention provides that the chainring cover with the directly facing cylinder section of the clamping device made in one piece is.
Dadurch wird eine weitere Vereinfachung der Gesamtkonstruktion durch Verringerung der erforderlichen Einzelteile erzielt.This will further simplify it the overall construction by reducing the number of individual parts required achieved.
Weitere Merkmale der Erfindung sind Gegenstand weiterer Unteransprüche.Other features of the invention are Subject of further subclaims.
Ein Ausführungsbeispiel der Erfindung ist in den beigefügten Zeichnungen dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is attached in the Drawings shown and will be described in more detail below.
Es zeigen:Show it:
In den Zeichnungen ist mit dem Bezugszeichen
Die Tretlagerkurbel
Die Klemmeinrichtung
Wie
Diese beiden Zylinderabschnitte
Vorteilhafterweise sind die Zylinderabschnitte
Die Kettenblatt-Abdeckscheibe
Die schon erwähnte Mutter
Nach Lösen der Spannschraube
Somit ist die Kettenblatt-Abdeckscheibe
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200420006978 DE202004006978U1 (en) | 2004-04-30 | 2004-04-30 | Cover disc for bicycle chainwheel is held by expansion clamp inserted axially into hollow crank shaft and expanded radially by screw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200420006978 DE202004006978U1 (en) | 2004-04-30 | 2004-04-30 | Cover disc for bicycle chainwheel is held by expansion clamp inserted axially into hollow crank shaft and expanded radially by screw |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202004006978U1 true DE202004006978U1 (en) | 2004-07-01 |
Family
ID=32668372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200420006978 Expired - Lifetime DE202004006978U1 (en) | 2004-04-30 | 2004-04-30 | Cover disc for bicycle chainwheel is held by expansion clamp inserted axially into hollow crank shaft and expanded radially by screw |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202004006978U1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103507884A (en) * | 2012-06-14 | 2014-01-15 | 川崎重工业株式会社 | Sprocket cover in straddle vehicle |
PT106810A (en) * | 2013-02-27 | 2014-08-27 | Miranda & Irm O Lda | CRYSTAL CURRENT PROTECTION SYSTEM FOR BICYCLES |
DE102014002433B4 (en) * | 2013-02-27 | 2016-06-16 | MIRANDA & IRMAO, LDa | Sprocket cover |
DE202016006526U1 (en) | 2015-11-25 | 2016-11-10 | Sunny Wheel Industrial Co.,Ltd. | sprocket |
US10124849B2 (en) | 2013-02-27 | 2018-11-13 | Miranda & Irmao, Lda. | Sprocket cover |
-
2004
- 2004-04-30 DE DE200420006978 patent/DE202004006978U1/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103507884A (en) * | 2012-06-14 | 2014-01-15 | 川崎重工业株式会社 | Sprocket cover in straddle vehicle |
CN103507884B (en) * | 2012-06-14 | 2016-08-31 | 川崎重工业株式会社 | Sprocket cover in straddle vehicle |
PT106810A (en) * | 2013-02-27 | 2014-08-27 | Miranda & Irm O Lda | CRYSTAL CURRENT PROTECTION SYSTEM FOR BICYCLES |
DE102014002433B4 (en) * | 2013-02-27 | 2016-06-16 | MIRANDA & IRMAO, LDa | Sprocket cover |
US10124849B2 (en) | 2013-02-27 | 2018-11-13 | Miranda & Irmao, Lda. | Sprocket cover |
DE202016006526U1 (en) | 2015-11-25 | 2016-11-10 | Sunny Wheel Industrial Co.,Ltd. | sprocket |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 20040805 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20070705 |
|
R021 | Search request validly filed |
Effective date: 20080125 |
|
R163 | Identified publications notified | ||
R151 | Term of protection extended to 8 years |
Effective date: 20100521 |
|
R158 | Lapse of ip right after 8 years |
Effective date: 20121101 |