CN115071879A - Rear derailleur - Google Patents
Rear derailleur Download PDFInfo
- Publication number
- CN115071879A CN115071879A CN202210600666.5A CN202210600666A CN115071879A CN 115071879 A CN115071879 A CN 115071879A CN 202210600666 A CN202210600666 A CN 202210600666A CN 115071879 A CN115071879 A CN 115071879A
- Authority
- CN
- China
- Prior art keywords
- unit
- resistance
- cover
- screwing unit
- resistance mechanism
- 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.)
- Granted
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Classifications
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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
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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
- B62M9/121—Rear derailleurs
- B62M9/128—Accessories, e.g. protectors
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a rear derailleur, comprising: a base member, a link assembly, a movable member, a chain guide, a biasing element, a resistance mechanism and a cap screwing unit. The base member is for mounting to a bicycle; the connecting rod component is arranged on the base component; the movable component is pivoted to the connecting rod component; the chain guide is pivoted to the movable component through a rotating shaft group; the deviation element is arranged between the movable component and the chain guide; the resistance mechanism is arranged on the movable component; the cover screwing unit is covered with the resistance mechanism and can act on the resistance mechanism. The invention operates and switches through the cover screwing unit, improves the stability and the reliability of the actuating position, and has the advantages of convenient and visual operation and good cleaning and maintenance.
Description
Technical Field
The present invention relates to bicycles and, more particularly, to a rear derailleur.
Background
The transmission system of a bicycle is designed with a plurality of speed ranges to be suitable for various road surfaces, and a common transmission system comprises a chain, a flywheel, a chain shifter and a corresponding control device, wherein the chain shifter can be divided into a front chain shifter and a rear chain shifter, the front chain shifter is installed on a chain wheel, and the rear chain shifter is installed at the flywheel, as in taiwan patent I580610.
In the I580610 patent, when the pivot and the outer member are integrated, the control lever drives the control cam and the setting cam to clamp against the friction applying member together, so that the friction applying member applies a friction resistance moment to the outer member, thereby preventing the pivot from rotating and ensuring that the chain guide is not easily operated.
However, the friction applying member is easily elastically fatigued, deformed and broken due to long-term use, and thus cannot effectively provide frictional resistance torque to the external member, resulting in reduced efficacy and even failure. Moreover, the control rod is easy to swing and break at will due to unexpected collision, which is not favorable for the stability of mechanism use and ensures the structural integrity, even the control rod is easy to clamp silt, and is relatively difficult to clean.
Therefore, there is a need for a new and improved rear derailleur that solves the above-mentioned problems.
Disclosure of Invention
The main objective of the present invention is to provide a rear derailleur, which operates the switch and lift the stable reliability of the actuating position by a cover turning unit, and has the advantages of convenient operation, intuition, and good cleaning and maintenance.
To achieve the above object, the present invention provides a rear derailleur comprising: a base member, a link assembly, a movable member, a chain guide, a biasing element, a resistance mechanism and a cap screwing unit. The base member is for mounting to a bicycle; the connecting rod component is arranged on the base component; the movable component is pivoted to the connecting rod component; the chain guide is pivoted to the movable component through a rotating shaft group; the deviation element is arranged between the movable component and the chain guide, and one end of the deviation element is positioned on the movable component while the other end is positioned on the chain guide; the resistance mechanism is arranged on the movable component; the cover screwing unit is provided with the resistance mechanism in a covering mode and can act on the resistance mechanism, the cover screwing unit can be rotatably positioned at a first position and a second position, the resistance mechanism has first resistance when the cover screwing unit is screwed at the first position, the resistance mechanism has second resistance when the cover screwing unit is screwed at the second position, and the magnitude of the second resistance is different from that of the first resistance.
The first resistance is greater than the second resistance.
The chain guide and the rotating shaft set are in the same rotating relationship.
The resistance mechanism is sleeved on the rotating shaft set.
The cap screwing unit can rotate relative to the movable component.
When the cap screwing unit is at the second position, the chain guide and the resistance mechanism are in linkage relation.
The cover screwing unit can be operated by the outside and is covered with the resistance mechanism, and when the cover screwing unit is operated at the first position, the chain guide device is not easy to rotate compared with the cover screwing unit at the second position.
The cover screwing unit can be operated by the outside and is covered with the resistance mechanism, and when the cover screwing unit is operated at the second position, the chain guide device is easier to rotate compared with the cover screwing unit at the first position.
The resistance mechanism comprises a ratchet wheel and a positioning pawl, the ratchet wheel and the rotating shaft form a same rotating relation, the positioning pawl is movably arranged on the movable component, when the cover screwing unit moves from the second position to the first position, the cover screwing unit drives the positioning pawl to be meshed with the ratchet wheel, when the cover screwing unit moves from the first position to the second position, the cover screwing unit releases the positioning pawl, and the positioning pawl can be separated from the ratchet wheel and is not meshed with each other.
The rear derailleur further comprises a linkage mechanism, the linkage mechanism comprises a pushing piece and an elastic piece, and the elastic piece is propped between the spiral cover unit and the pushing piece; when the cap screwing unit moves from the second position to the first position, the cap screwing unit drives the pushing piece to push the positioning pawl to be meshed with the ratchet wheel.
The invention has the beneficial effects that: the invention operates and switches through the cover screwing unit, improves the stability and the reliability of the actuating position, and has the advantages of convenient and visual operation and good cleaning and maintenance.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a first partially exploded view of fig. 1.
Fig. 3 is a second partially exploded view of fig. 1.
Fig. 4 is a partial cross-sectional view of fig. 1.
FIG. 5 is a positioning pawl engaging ratchet according to one embodiment of the present invention.
FIG. 6 shows a positioning pawl disengaging ratchet in accordance with one embodiment of the present invention.
Fig. 7 shows a capping unit according to an embodiment of the present invention.
1 base member
2: connecting rod assembly
3: a movable member
34 second positioning unit
35 third positioning unit
4: chain guide
5 rotating shaft set
6 deflection element
7 resistance mechanism
71 ratchet wheel
72 positioning pawl
8: cap screwing unit
81: concave hole
82 first positioning unit
83 the base
831 actuating space
84, spiral cover body
9: linkage mechanism
91 pushing piece
92 resilient member
Detailed Description
The following description is given by way of example only, and is not intended to limit the scope of the invention, as claimed, wherein the terms "a" or "an" or "at least one" used herein should not be construed as limiting the number, which can be "a plurality" or "the" number "as desired, and variations thereof are within the scope of the invention as claimed.
Referring to FIGS. 1-7, an embodiment of the present invention is shown, a rear derailleur of the present invention includes: a base member 1, a link assembly 2, a movable member 3, a chain guide 4, a biasing element 6, a resistance mechanism 7, and a cap screwing unit 8.
The base member 1 is adapted to be mounted to a bicycle, the linkage assembly 2 is disposed on the base member 1, and the movable member 3 is pivotally connected to the linkage assembly 2 such that a rider can adjust a position of the bicycle relative to the base member 1 as desired. The chain guide 4 is pivoted to the movable member 3 via a rotation shaft set 5, and the chain guide 4 and the rotation shaft set 5 are in the same rotation relationship.
The deviation element 6 is disposed between the movable member 3 and the chain guide 4, one end of the deviation element 6 is positioned on the movable member 3, and the other end is positioned on the chain guide 4, so as to provide pre-pressing elastic force to the chain guide 4 for stabilizing the chain guide 4, so that the chain guide 4 cannot rotate arbitrarily. The resistance mechanism 7 is disposed on the movable member 3 to selectively provide additional resistance to the rotating shaft set 5, and further to select the resistance value of the chain guide 4 against rotation, in this embodiment, the resistance mechanism 7 is sleeved on the rotating shaft set 5.
The cover-rotating unit 8 covers the resistance mechanism 7 and acts on the resistance mechanism 7, the cover-rotating unit 8 can rotate relative to the movable member 3, in other words, the cover-rotating unit 8 and the resistance mechanism 7 are linked, a rider can drive the resistance mechanism 7 to move by rotating the cover-rotating unit 8, the operation is quite convenient and intuitive, and the whole mechanism has the advantages of reducing components and simplifying the structure. In addition, in case of collision, two objects colliding with each other mostly move linearly, and the capping unit 8 needs to rotate to be activated, so that the capping unit 8 is less likely to move easily in case of unexpected collision, and has better stability and reliability.
In detail, the cap screwing unit 8 is rotatably positioned at a first position and a second position, the resistance mechanism 7 has a first resistance when the cap screwing unit 8 is rotatably positioned at the first position, the resistance mechanism 7 has a second resistance when the cap screwing unit 8 is rotatably positioned at the second position, and the second resistance is different from the first resistance, so that a user can select different resistances according to a demand condition to change the rotation resistance of the chain guide 4.
In this embodiment, the cap screwing unit 8 can be operated from the outside and is covered with the resistance mechanism 7, and the first resistance is greater than the second resistance, that is, when the cap screwing unit 8 is operated at the first position, compared with the case where the cap screwing unit 8 is located at the second position, the chain guide 4 is not easy to rotate, and is suitable for riding on a bumpy road surface, and the occurrence of a chain throwing situation can be effectively suppressed. Conversely, when the cap screwing unit 8 is operated at the second position, the chain guide 4 is easier to rotate than when the cap screwing unit 8 is at the first position, and is suitable for users to assemble and calibrate the rear wheel, wear the chain, adjust the speed change and the like.
In this embodiment, the resistance mechanism 7 includes a ratchet wheel 71 and a positioning pawl 72, the ratchet wheel 71 and the rotating shaft set 5 rotate in the same direction, the positioning pawl 72 is movably disposed on the movable member 3, when the cover rotating unit 8 moves from the second position to the first position, the cover rotating unit 8 drives the positioning pawl 72 to engage with the ratchet wheel 71, so that the resistance mechanism 7 has the first resistance, and the occurrence of chain swinging caused by the chain guide 4 rotating reversely due to road surface bumping can be sufficiently suppressed. When the cap screwing unit 8 moves from the first position to the second position, i.e. when the cap screwing unit 8 is at the second position, the cap screwing unit 8 releases the positioning pawl 72, the positioning pawl 72 can be disengaged from the ratchet wheel 71 without being engaged with each other, and at this time, the chain guide 4 and the resistance mechanism 7 are in linkage relation.
It should be noted that the rear derailleur further includes a linkage mechanism 9, and the cover rotating unit 8 is linked with the resistance mechanism 7 through the linkage mechanism 9. More specifically, the linkage mechanism 9 includes a pushing member 91 and an elastic member 92, the elastic member 92 is abutted between the cap screwing unit 8 and the pushing member 91, so that the cap screwing unit 8 and the pushing member 91 are in linkage; when the capping unit 8 moves from the second position to the first position, the capping unit 8 pushes the elastic member 92 to drive the pushing member 91 to push the positioning pawl 72 to engage with the ratchet 71, otherwise, when the capping unit 8 moves from the first position to the second position, the elastic member 92 is not squeezed and stretched, and at this time, the pushing member 91 can release the ratchet 71 by gravity, or the ratchet 71 rotates to reversely push the positioning pawl 72 to drive the pushing member 91 to move reversely.
In the present embodiment, the pushing element 91 is in a sleeve shape, and one end of the elastic element 92 is inserted into the pushing element 91, and the other end is inserted into a concave hole 81 of the cap screwing unit 8, so that the elastic element 92 can be effectively limited to avoid falling off.
The cap screwing unit 8 comprises a base 83 and a cap screwing body 84, the base 83 is detachably assembled on the movable component 3, the base 83 comprises an actuating space 831, the resistance mechanism 7 is accommodated in the actuating space 831 to block foreign objects (such as dust, small broken stone and muddy water … …), so as to ensure smooth and unimpeded action of the resistance mechanism 7, the cap screwing body 84 can be relatively rotatably covered on the base 83 and cover the actuating space 831 to block the foreign objects in all directions, and the cap screwing body 84 can be rotatably positioned at a first position and a second position; wherein, the elastic member 92 is elastically abutted between the cap body 84 and the pushing member 91.
Preferably, one of the base 83 and the cap body 84 is provided with a first positioning unit 82, the other one is provided with a second positioning unit 34 and a third positioning unit 35, when the cap unit 8 is located at the first position, the first positioning unit 82 and the second positioning unit 34 are engaged with each other, so that the cap unit 8 is kept located at the first position. Similarly, when the cap screwing unit 8 is located at the second position, the first positioning unit 82 and the third positioning unit 35 are engaged with each other, so that the cap screwing unit 8 is kept located at the second position.
In the present embodiment, the cover screwing unit 8 is provided with the first positioning unit 82, the base 83 is provided with the second positioning unit 34 and the third positioning unit 35, wherein the first positioning unit 82 is an elastic member, and the second positioning unit 34 and the third positioning unit 35 are grooves.
Claims (10)
1. A rear derailleur, characterized by: the method comprises the following steps:
a base member mounted to the bicycle;
a link assembly disposed on the base member;
a movable member pivotally connected to the linkage assembly;
a chain guide pivotally connected to the movable member via a set of rotating shafts;
a deflection element disposed between the movable member and the chain guide, and having one end positioned on the movable member and the other end positioned on the chain guide;
a resistance mechanism disposed on the movable member; and
the cover screwing unit is arranged on the resistance mechanism in a covering mode and can act on the resistance mechanism, the cover screwing unit can be rotatably positioned at a first position and a second position, the resistance mechanism has first resistance when the cover screwing unit is screwed at the first position, the resistance mechanism has second resistance when the cover screwing unit is screwed at the second position, and the second resistance is different from the first resistance in size.
2. The rear derailleur according to claim 1, wherein: the first resistance is greater than the second resistance.
3. The rear derailleur according to claim 1, wherein: the chain guide and the rotating shaft set are in the same rotating relationship.
4. The rear derailleur according to claim 1, wherein: the resistance mechanism is sleeved on the rotating shaft set.
5. The rear derailleur according to claim 1, wherein: the cap rotating unit can rotate relative to the movable member.
6. The rear derailleur according to claim 1, wherein: when the cap screwing unit is at the second position, the chain guide and the resistance mechanism are in linkage relation.
7. The rear derailleur according to any one of claims 1 to 6, wherein: the cover turning unit can be operated by the outside and is covered with the resistance mechanism, and when the cover turning unit is operated at the first position, the chain guide device is not easy to rotate compared with the cover turning unit at the second position.
8. The rear derailleur according to any one of claims 1 to 6, wherein: the cover screwing unit can be operated by the outside and is covered with the resistance mechanism, and when the cover screwing unit is operated at the second position, the chain guide device is easier to rotate compared with the cover screwing unit at the first position.
9. The rear derailleur according to claim 1, wherein: the resistance mechanism comprises a ratchet wheel and a positioning pawl, the ratchet wheel and the rotating shaft form a same rotating relation, the positioning pawl is movably arranged on the movable component, when the cover screwing unit moves from the second position to the first position, the cover screwing unit drives the positioning pawl to be meshed with the ratchet wheel, when the cover screwing unit moves from the first position to the second position, the cover screwing unit releases the positioning pawl, and the positioning pawl can be separated from the ratchet wheel and is not meshed with each other.
10. The rear derailleur according to claim 9, wherein: the linkage mechanism comprises a pushing piece and an elastic piece, and the elastic piece is propped between the spiral cover unit and the pushing piece; when the cap screwing unit moves from the second position to the first position, the cap screwing unit drives the pushing piece to push the positioning pawl to be meshed with the ratchet wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210600666.5A CN115071879B (en) | 2022-05-30 | 2022-05-30 | rear derailleur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210600666.5A CN115071879B (en) | 2022-05-30 | 2022-05-30 | rear derailleur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115071879A true CN115071879A (en) | 2022-09-20 |
| CN115071879B CN115071879B (en) | 2023-10-20 |
Family
ID=83249437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210600666.5A Active CN115071879B (en) | 2022-05-30 | 2022-05-30 | rear derailleur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115071879B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406643A (en) * | 1979-12-19 | 1983-09-27 | Shimano Industrial Company Limited | Derailleur for a bicycle |
| US20130310204A1 (en) * | 2012-05-21 | 2013-11-21 | Shimano, Inc. | Bicycle derailleur with rotation resistance and tactile feedback |
| TWM526541U (en) * | 2015-12-18 | 2016-08-01 | 利奇機械工業股份有限公司 | Rear gearshift device for bicycle |
| CN206288184U (en) * | 2015-12-18 | 2017-06-30 | 利奇机械工业股份有限公司 | Rear speed variator for bicycle |
| US20180244345A1 (en) * | 2017-02-24 | 2018-08-30 | Shimano Inc. | Bicycle rear derailleur |
| TWI641531B (en) * | 2017-05-31 | 2018-11-21 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| TWI650270B (en) * | 2017-12-29 | 2019-02-11 | 日馳企業股份有限公司 | Bicycle derailleur |
| US20190061877A1 (en) * | 2017-08-23 | 2019-02-28 | Shimano Inc. | Bicycle rear derailleur |
| TWI705026B (en) * | 2019-09-04 | 2020-09-21 | 台灣微轉股份有限公司 | Bicycle derailleur |
| CN114537578A (en) * | 2022-02-10 | 2022-05-27 | 惠州市元胜自行车配件有限公司 | Bicycle front derailleur |
-
2022
- 2022-05-30 CN CN202210600666.5A patent/CN115071879B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406643A (en) * | 1979-12-19 | 1983-09-27 | Shimano Industrial Company Limited | Derailleur for a bicycle |
| US20130310204A1 (en) * | 2012-05-21 | 2013-11-21 | Shimano, Inc. | Bicycle derailleur with rotation resistance and tactile feedback |
| TWM526541U (en) * | 2015-12-18 | 2016-08-01 | 利奇機械工業股份有限公司 | Rear gearshift device for bicycle |
| CN206288184U (en) * | 2015-12-18 | 2017-06-30 | 利奇机械工业股份有限公司 | Rear speed variator for bicycle |
| US20180244345A1 (en) * | 2017-02-24 | 2018-08-30 | Shimano Inc. | Bicycle rear derailleur |
| CN108502091A (en) * | 2017-02-24 | 2018-09-07 | 株式会社岛野 | Bicycle derailleur |
| TWI641531B (en) * | 2017-05-31 | 2018-11-21 | 彥豪金屬工業股份有限公司 | Bicycle rear derailleur |
| US20190061877A1 (en) * | 2017-08-23 | 2019-02-28 | Shimano Inc. | Bicycle rear derailleur |
| TWI650270B (en) * | 2017-12-29 | 2019-02-11 | 日馳企業股份有限公司 | Bicycle derailleur |
| TWI705026B (en) * | 2019-09-04 | 2020-09-21 | 台灣微轉股份有限公司 | Bicycle derailleur |
| CN114537578A (en) * | 2022-02-10 | 2022-05-27 | 惠州市元胜自行车配件有限公司 | Bicycle front derailleur |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115071879B (en) | 2023-10-20 |
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