CN203727600U - Bicycle rear derailleur - Google Patents
Bicycle rear derailleur Download PDFInfo
- Publication number
- CN203727600U CN203727600U CN201420094445.6U CN201420094445U CN203727600U CN 203727600 U CN203727600 U CN 203727600U CN 201420094445 U CN201420094445 U CN 201420094445U CN 203727600 U CN203727600 U CN 203727600U
- Authority
- CN
- China
- Prior art keywords
- chain guide
- movable member
- chain
- locking
- locking piece
- 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.)
- Withdrawn - After Issue
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
A bicycle rear derailleur comprises a base component, a movable component, a chain guide part, an initial position positioning mechanism, a pretightening mechanism and position locking mechanism. The position locking mechanism is used for locking the chain guide part to a special position relative to the movable component. The position locking mechanism comprises a locking part and a contact part. The locking part rotates around an axis basically parallel with a rotating axis. The locking part is mounted on the movable component or the chain guide part, and the contact part is mounted on the other one of the two. When a maintainer needs to operate, the chain guide part is switched to one position, the locking part is then rotated to a working state, the chain guide part is released, the locking part is combined with the contact part mounted on the chain guide part to locking the chain guide part to a special position relative to the movable component, a chain is loosened at the special position, and the maintainer can fast and convenient complete various operations such as mounting and demounting of a bicycle rear wheel and the chain.
Description
[technical field]
The utility model relates to group chain device in bicycle shift system, more specifically refers to the rear derailleur of bicycle.
[background technology]
Bicycle speed-varying unit generally comprises the speed change driving lever or the speed change handle that are installed on handlebar, is arranged near the front chain shifter of bicycle middle shaft and is arranged near the rear derailleur of bicycle tail end hind axle.Especially for Rear Derailleur, be arranged on bicycle rear shaft owing to thering is the rear flywheel of multiple gear clusters, chain needs again to engage with rear flywheel through rear derailleur simultaneously, under the effect of speed change driving lever or speed change handle, rear derailleur is positioned at chain on gear cluster larger or less on rear flywheel according to different gears.In order fast and accurately chain to be navigated to required gear by user's requirement, rear derailleur is in the time of initial position, top tumbler in chain guide can will produce larger coated region on the tooth of chain minimum in bicycle rear flywheel, be the front of the rotation axis of top tumbler and the axis of bicycle rear shaft in chain guide, between the two, have a larger distance.Such design also produces some problems simultaneously, in the time that maintainer dismantles trailing wheel or rear flywheel, must rear derailleur be pulled to a distance backward with hand, the axis rear that makes the rotation axis of top tumbler in chain guide move on to bicycle rear shaft just can have enough spaces that trailing wheel is pulled down; In the time that maintainer cleans or change chain, also must hand-pull chain and be applied to the power on chain guide to overcome pre-tightening mechanism in rear derailleur simultaneously, to make chain lax.Then chain could be unloaded or is connected.The unusual inconvenience of such installation and maintenance work meeting and uncomfortable.Therefore need to have a kind of mechanism can make chain guide in rear derailleur for movable part, be fixed on a specific position.On this position, i.e. trailing wheel for convenience detach, also can make chain remain on lax state simultaneously, is convenient to safeguard cleaning and erection work.
[utility model content]
The purpose of this utility model is not affect rear derailleur allomeric function and do not increasing under the prerequisite of rear derailleur overall profile height, can fast and easily dismantle and install the bicycle derailleur of bicycle rear and chain.
In order to solve the technical matters of above-mentioned existence, the utility model adopts following technical proposals:
A kind of bicycle derailleur, it includes:
Be installed to the base component on cycle frame;
Be connected to movably the movable member on base component;
The chain guide being rotationally connected by pivot and movable member is provided with the initial position fix mechanism of chain guide between described chain guide and movable member;
Make chain guide swing the pre-tightening mechanism that is tightened in advance initial position;
For chain guide being locked in for movable member to the position locking mechanism of a specific position, described position locking mechanism has locking piece and contact element, and this locking piece rotates around the axis substantially parallel with rotation axis; Described locking piece is arranged on any part in movable member or chain guide, and contact element is located on another part in these two.
In to the improvement project of above-mentioned bicycle derailleur, described chain guide includes outer chain cage plate, interior chain cage plate, tension wheel and guide wheel.
In to the improvement project of above-mentioned bicycle derailleur, described locking piece is arranged on movable member and can be rotated around anchor shaft by anchor shaft; On that section of anchor shaft that is positioned at locking piece, overlapping to have to make it be adjacent to the spring on movable member; Described contact element is provided in a side of the part that raises up on outer chain cage plate.
In to the improvement project of above-mentioned bicycle derailleur, described contact element is pin or axle class.
In to the improvement project of above-mentioned bicycle derailleur, described initial position fix mechanism includes the raising up part and be located at the part that extends laterally on movable member being located on outer chain cage plate.
In to the improvement project of above-mentioned bicycle derailleur, described pre-tightening mechanism is provided in a side of the torsion spring on movable member.
Compared with prior art, the beneficial effects of the utility model are: owing to having increased the position locking mechanism of a chain guide, this device, under initial condition, does not contact with contact element, therefore can not affect the normal function that chain guide rotates freely with respect to movable member; But in the time that maintainer need to operate, can first chain guide be pulled forward to a position, then locking piece is turned to mode of operation, then decontrol chain guide, now locking piece can be combined by the contact element on being arranged on chain guide, chain guide is locked in to a specific position with respect to movable member, and in the time of this position, chain can be very lax, and maintainer can complete quickly and easily dismounting and the work in everies such as bicycle rear and chain are installed like this.
Below in conjunction with accompanying drawing and detailed description of the invention, the utility model is described in further detail:
[brief description of the drawings]
Fig. 1 is the locking piece exploded drawings of the utility model embodiment;
Fig. 2 is the front view of the utility model embodiment;
Fig. 3 is the lateral plan of the utility model embodiment;
Fig. 4 is that the utility model embodiment is when the lateral plan of its chain guide in the time that movable member turns to maximum position;
Fig. 5 is that the utility model embodiment is when front view and the partial enlarged drawing of its chain guide in the time that movable member turns to maximum position;
Fig. 6 is front view and the partial enlarged drawing of the utility model embodiment when its chain guide is locked in to specific control position;
Fig. 7 is the rear view of the locking piece of the utility model embodiment;
Fig. 8 is the front view of the locking piece of the utility model embodiment.
[detailed description of the invention]
Can clearly be found out by Fig. 1 ~ Fig. 3, being arranged on back lower fork of bicycle tail hooks the rear derailleur with position locking mechanism and generally comprises: anchor shaft 15, base component 20, outside connecting rod member 30, inside connecting rod member 40, movable member 50, outer chain cage plate 60, interior chain cage plate 61, tension wheel 62 and guide wheel 63 and position locking mechanism 70 etc.Wherein position locking mechanism 70 comprises: locking piece 71, anchor shaft 72 and spring 73.In the utility model embodiment, described chain guide is mainly by outer chain cage plate 60, interior chain cage plate 61, and tension wheel 62 and guide wheel 63 form.Wherein inside and outside chain cage plate 61,60 is fixed on guide wheel 63 and tension wheel 62 between the two by tightening screw axle, and guide wheel and tension wheel can freely rotate around anchor shaft separately.Simultaneously chain guide is by pivot and movable member 50 is pivotable is linked together, and therefore chain guide can rotate with respect to movable member 50 freely around axis Y.Described pre-tightening mechanism typically refers to a torsion spring, generally be assemblied on movable member, described pre-tightening mechanism is tightened in advance initial position when chain guide is rotated around rotation axis Y under the effect of predetermincd tension, and chain guide is positioned at initial position by initial position fix mechanism.Chain guide can turn to different positions with respect to movable member overcoming the predetermincd tension of pre-tightening mechanism.By seeing in Fig. 3, on outer chain cage plate 60, there is the part 60a that raises up near movable member 50 places, corresponding also has one to extend laterally part 50a on movable member 50.Wherein on movable member, extend laterally part 50a by contacting and make chain guide be tightened in advance initial position under the predetermincd tension effect of pre-tightening mechanism with the part 60a that raises up on outer chain cage plate, in the time of this position, chain guide cannot rotate with respect to movable member in the direction of the clock.In the partial enlarged drawing of Fig. 1 and Fig. 3 and Fig. 5, also can clearly see, locking piece 71 in position locking mechanism 70 is be arranged on movable member and can be rotated around anchor shaft 72 by anchor shaft 72, and anchor shaft 72 passes spring 73 and spring 73 is arranged on to the inside of locking piece 71.The rotation axis Y that the axis S that wherein anchor shaft 72 has rotates around movable member 50 with chain guide is parallel substantially.Under the effect of spring 73, locking piece 71 under normal circumstances locking piece lock part 71d is wherein adjacent in a side of movable member 50, at this moment, position locking mechanism 70 does not play a role, and chain guide can freely rotate around rotation axis Y in the situation that overcoming predetermincd tension.In Fig. 4 and Fig. 5, can clearly see, now the locking piece 71 in position locking mechanism and chain guide without any contact.
Can be seen by Fig. 7 and Fig. 8, locking piece 71 is made up of several parts: wherein trigger-like part 71a, the contact portion 71b contacting with movable member, the chain guide lock part 71c contacting with the part 60a that raises up being arranged on outer chain cage plate, locking piece lock part 71d, wherein Fig. 6 is the schematic diagram of position locking mechanism in working order time, user first rotates to a position by graphic hand of rotation R around rotation axis Y by chain guide with a hand, in this position, the part 60a that raises up being arranged on chain guide China and foreign countries chain cage plate must cross the locking piece lock part 71d on locking piece 71, then with another hand, the trigger-like part 71a of locking piece is pulled open to maximum position simultaneously, this is that the contact portion 71b contacting with movable member on locking piece touches on the sidewall of movable member 50, then decontrol lightly that hand of holding chain guide, at this moment the chain guide lock part 71c on locking piece, locking piece lock part 71d contacts and the part 60a that raises up is included in the space being made up of chain guide lock part 71c and locking piece lock part 71d with the part 60a that raises up on outer chain cage plate, the effect of its medium chain guide lock part 71c is to stop chain guide to turn back to initial position under the effect of initial tension of spring, and the effect of locking piece lock part 71d is to prevent that locking piece 71 from turning back to not control position under the effect of spring 73.Under this state, chain guide is locked in a fixed position, at this moment in the situation that there is no predetermincd tension, becomes very lax through the chain on chain guide, convenient for maintaining maintenance and other operation.
When user or maintainer complete after predetermined work, only need be with hand by chain guide to angle of the R direction rotation shown in Fig. 6, at this moment the part 60a that raises up being arranged on outer chain cage plate has just departed from the chain guide lock part 71c by locking piece 71, the ' locked ' zone of locking piece lock part 71d composition, simultaneously under the effect of spring 73, locking piece 71 can be got back to initial position, chain guide is just got back to initial position under the effect of pre-tightening mechanism like this, the part 60a that raises up being arranged on outer chain cage plate extends laterally part 50a contact position on movable member with being arranged on.
In the utility model, preferably locking piece 71 is arranged on movable member 50, and contact element is arranged on chain guide, in the present embodiment, contact element is provided in a side of the part 60a that raises up on outer chain cage plate 60.But equally also locking piece can be arranged on chain guide and contact element is arranged on movable member.
Preferably, described initial position fix mechanism includes the part 60a and be located at and extend laterally part 50a on movable member of raising up being located on outer chain cage plate 60, the part that raises up like this 60a is both as the contact element of lockout mechanism, makes chain guide be positioned at initial position under pre-tightening mechanism effect again as one of locations of initial position fix mechanism.
Although detailed explanation above there are the various embodiment of the utility model feature, not departing from the modification that can adopt other in spirit and scope of the present utility model.For example, can change the size of various parts, shape or upper-lower position etc.The function of a part can realize by two, and vice versa.But it will be apparent to one skilled in the art that in the case of and do not depart from the principle of the present utility model and spiritual scope of described claim restriction by the disclosure, can the utility model be made a variety of changes or be revised.Therefore, the detailed description of disclosure embodiment is only used for explaining, instead of is used for limiting the utility model, but is defined by the subject-matter of the claims the scope of protection.
Claims (6)
1. a bicycle derailleur, is characterized in that, includes:
Be installed to the base component (20) on cycle frame;
Be connected to movably the movable member (50) on base component (20);
The chain guide being rotationally connected by pivot and movable member (50) is provided with the initial position fix mechanism of chain guide between described chain guide and movable member (50);
Make chain guide swing the pre-tightening mechanism that is tightened in advance initial position;
For chain guide being locked in for movable member to the position locking mechanism of a specific position, described position locking mechanism has locking piece and contact element, and this locking piece rotates around the axis substantially parallel with rotation axis; Described locking piece is arranged on any part in movable member or chain guide, and contact element is located on another part in these two.
2. bicycle derailleur according to claim 1, is characterized in that, described chain guide includes outer chain cage plate (60), interior chain cage plate (61), tension wheel (62) and guide wheel (63).
3. bicycle derailleur according to claim 2, is characterized in that, described locking piece (71) is arranged on movable member (50) above and can be rotated around anchor shaft (72) by anchor shaft (72); Have and can make it be adjacent to the spring (73) on movable member at the upper cover of that section of anchor shaft (72) that is positioned at locking piece (71); Described contact element is provided in a side of the part (60a) that raises up on outer chain cage plate (60).
4. bicycle derailleur according to claim 3, is characterized in that, described contact element is pin or axle.
5. according to the bicycle derailleur described in claim 3 or 4, it is characterized in that, described initial position fix mechanism includes the part (60a) and be located at extend laterally partly (50a) on movable member of raising up being located on outer chain cage plate (60).
6. according to the bicycle derailleur described in claim 1,2,3 or 4, it is characterized in that, described pre-tightening mechanism is provided in a side of the torsion spring on movable member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094445.6U CN203727600U (en) | 2014-03-04 | 2014-03-04 | Bicycle rear derailleur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420094445.6U CN203727600U (en) | 2014-03-04 | 2014-03-04 | Bicycle rear derailleur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203727600U true CN203727600U (en) | 2014-07-23 |
Family
ID=51197694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420094445.6U Withdrawn - After Issue CN203727600U (en) | 2014-03-04 | 2014-03-04 | Bicycle rear derailleur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203727600U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832535A (en) * | 2014-03-04 | 2014-06-04 | 钱海泽 | Rear shifting speed changer of bicycle |
| TWI680911B (en) * | 2018-08-22 | 2020-01-01 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| TWI684553B (en) * | 2019-01-11 | 2020-02-11 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| CN112389577A (en) * | 2017-07-28 | 2021-02-23 | 株式会社岛野 | Bicycle rear chain shifter |
| EP3964437A1 (en) * | 2020-09-03 | 2022-03-09 | SRAM Deutschland GmbH | Electromechanical rear derailleur for coaxial assembly with blocking device |
-
2014
- 2014-03-04 CN CN201420094445.6U patent/CN203727600U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832535A (en) * | 2014-03-04 | 2014-06-04 | 钱海泽 | Rear shifting speed changer of bicycle |
| CN103832535B (en) * | 2014-03-04 | 2016-03-30 | 钱海泽 | Bicycle derailleur |
| CN112389577A (en) * | 2017-07-28 | 2021-02-23 | 株式会社岛野 | Bicycle rear chain shifter |
| TWI680911B (en) * | 2018-08-22 | 2020-01-01 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| TWI684553B (en) * | 2019-01-11 | 2020-02-11 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| EP3964437A1 (en) * | 2020-09-03 | 2022-03-09 | SRAM Deutschland GmbH | Electromechanical rear derailleur for coaxial assembly with blocking device |
| US11780532B2 (en) | 2020-09-03 | 2023-10-10 | Sram Deutschland, Gmbh | Electromechanical derailleur for coaxial assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140723 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |