CN115071879B - rear derailleur - Google Patents
rear derailleur Download PDFInfo
- Publication number
- CN115071879B CN115071879B CN202210600666.5A CN202210600666A CN115071879B CN 115071879 B CN115071879 B CN 115071879B CN 202210600666 A CN202210600666 A CN 202210600666A CN 115071879 B CN115071879 B CN 115071879B
- Authority
- CN
- China
- Prior art keywords
- cover unit
- resistance
- resistance mechanism
- chain guide
- unit
- 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.)
- Active
Links
- 230000008261 resistance mechanism Effects 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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)
- Transmission Devices (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (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 screw cap unit. The base member is for mounting to a bicycle; the connecting rod assembly is arranged on the base component; the movable component is pivoted to the connecting rod component; the chain guide is pivoted to the movable member through a rotation shaft group; the deflection element is arranged between the movable component and the chain guide; the resistance mechanism is arranged on the movable component; the spiral cover unit covers the resistance mechanism and can act on the resistance mechanism. The invention can switch the operation and improve the stability and reliability of the operation position by the cap screwing unit, and has the advantages of convenient and visual operation and good cleaning and maintenance.
Description
Technical Field
The present invention relates generally to bicycles and, more particularly, to a rear derailleur.
Background
The transmission system of the bicycle is designed to correspond to various road surfaces, and generally comprises a chain, a flywheel, a derailleur and a corresponding control device, wherein the derailleur can be divided into a front derailleur and a rear derailleur, the front derailleur is mounted on a tooth disc, and the rear derailleur is mounted at the flywheel, for example, the taiwan patent I580610 belongs to the category.
In the I580610 patent, when the pivot shaft and the outer member are formed as a unit, the control lever drives the control cam and the setting cam to clamp the friction applying member together, so that the friction applying member applies a friction resisting moment to the outer member, and the pivot shaft is not easy to rotate, so that the chain guide is not easy to operate.
However, the friction applying member is easily elastically fatigued, deformed, broken due to long-term use, and cannot effectively provide friction resistance moment to the external member, resulting in reduced efficacy or even failure. In addition, the control rod piece is easy to swing and break at will due to unexpected collision, which is not beneficial to the stability of the mechanism and ensures the structural integrity, and even the control rod piece is easy to clamp sediment and is relatively difficult to clean.
Accordingly, there is a need for a new and improved rear derailleur that solves the above-mentioned problems.
Disclosure of Invention
The main object of the present invention is to provide a rear derailleur, which is operated and switched by a cap screwing unit, and has the advantages of stable and reliable actuating position, convenient and visual operation 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 screw cap unit. The base member is for mounting to a bicycle; the connecting rod assembly is arranged on the base component; the movable component is pivoted to the connecting rod component; the chain guide is pivoted to the movable member through a rotation shaft group; the deflection element is arranged between the movable component and the chain guide, and one end of the deflection element is positioned on the movable component, and the other end of the deflection element is positioned on the chain guide; the resistance mechanism is arranged on the movable component; the cap screwing unit is covered by the resistance mechanism and can act on the resistance mechanism, the cap screwing unit can be rotatably positioned at a first position and a second position, the resistance mechanism has a first resistance when the cap screwing unit is rotatably positioned at the first position, the resistance mechanism has a second resistance when the cap screwing unit is rotatably positioned at the second position, and the second resistance is different from the first resistance in magnitude.
The first resistance is greater than the second resistance.
The chain guide and the rotation shaft set are in the same rotation relationship.
The resistance mechanism is sleeved on the rotating shaft group.
The cap screwing unit is rotatable relative to the movable member.
When the cap screwing unit is at the second position, the chain guide and the resistance mechanism are in linkage relation.
The rotary cover unit can be operated by the outside and is covered by the resistance mechanism, and when the rotary cover unit is operated at the first position, the chain guide is less easy to rotate than when the rotary cover unit is positioned at the second position.
The rotary cover unit can be operated by the outside and is covered by the resistance mechanism, and when the rotary cover unit is operated at the second position, the chain guide is easier to rotate than when the rotary cover unit is positioned at the first position.
The resistance mechanism comprises a ratchet wheel and a positioning pawl, the ratchet wheel and the rotating shaft form the same rotation relationship, the positioning pawl is movably arranged on the movable component, when the spiral cover unit moves from the second position towards the first position, the spiral cover unit drives the positioning pawl to be meshed with the ratchet wheel, and when the spiral cover unit moves from the first position towards the second position, the spiral cover unit releases the positioning pawl, and the positioning pawl can be separated from the ratchet wheel without being meshed with each other.
The rear derailleur further comprises a linkage mechanism, 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 towards 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 can switch the operation and improve the stability and reliability of the operation position by the cap screwing unit, 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 the positioning pawl disengaged from the ratchet according to one embodiment of the present invention.
Fig. 7 is a schematic view of a cap screwing unit according to an embodiment of the invention.
1 base Member
2 connecting rod assembly
3 Movable member
34 second positioning Unit
35 third positioning unit
4 chain guide
5 rotation shaft group
6 deviation element
7 resistance mechanism
71 ratchet wheel
72 positioning pawl
8 cap screwing unit
81 concave hole
82 first positioning unit
83 base
831 actuating space
84, spiral cover body
9 linking mechanism
91 push member
92 elastic member
Detailed Description
The following examples are given to illustrate possible embodiments of the present invention, but are not intended to limit the scope of the invention, and the terms "a" or "an" as used herein are not intended to limit the number of the embodiments, but rather the number of the embodiments is also "a plurality" as required, and the scope of the embodiments is defined by the claims.
Referring to FIGS. 1 to 7, there is shown an embodiment of the present invention, a rear derailleur of the present invention comprising: 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 screw cap unit 8.
The base member 1 is configured to be mounted to a bicycle, the link assembly 2 is disposed on the base member 1, and the movable member 3 is pivotally connected to the link assembly 2, so that a rider can adjust the position of the movable member with respect to the base member 1 according to requirements. The chain guide 4 is pivotally connected to the movable member 3 via a rotation shaft set 5, such that the chain guide 4 and the rotation shaft set 5 are in a co-rotating relationship.
The deflection element 6 is arranged between the movable member 3 and the chain guide 4, and one end of the deflection element 6 is positioned on the movable member 3, and the other end is positioned on the chain guide 4 to provide pre-pressing elastic force to the chain guide 4 for achieving the purpose of stability, so that the chain guide 4 cannot rotate randomly. The resistance mechanism 7 is disposed on the movable member 3 to selectively provide additional resistance to the rotation shaft set 5, so as to select the magnitude of the resistance of the chain guide 4 against rotation, and in this embodiment, the resistance mechanism 7 is sleeved on the rotation shaft set 5.
The cap screwing unit 8 is provided with the resistance mechanism 7 in a covering manner and can act on the resistance mechanism 7, the cap screwing unit 8 can rotate relative to the movable member 3, in other words, the cap screwing unit 8 and the resistance mechanism 7 are in linkage relationship, a rider can drive the resistance mechanism 7 to act by rotating the cap screwing unit 8, the operation is quite convenient and intuitive, and the integral mechanism has the advantages of reducing components and simplifying the structure. In addition, when collision occurs, two objects that collide with each other mostly move linearly, and the cap screwing unit 8 needs to rotate to be actuated, so that the cap screwing unit 8 is less likely to move easily when unexpected collision occurs, and better stability and reliability can be achieved.
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 rotated at the first position, the resistance mechanism 7 has a second resistance when the cap screwing unit 8 is rotated at the second position, and the second resistance is different from the first resistance, so that a user can select different resistances according to the requirement condition to change the anti-rotation capability of the chain guide 4.
In this embodiment, the cap screwing unit 8 is capable of being operated from the outside and is covered by the resistance mechanism 7, and the first resistance is greater than the second resistance, that is, when the cap screwing unit 8 is operated in the first position, the chain guide 4 is less likely to rotate than when the cap screwing unit 8 is positioned in the second position, and is suitable for riding on a bumpy road, so that the occurrence of chain throwing can be effectively suppressed. 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, so that the assembly and adjustment matters such as disassembling and assembling the rear wheel, threading the chain, adjusting and shifting are suitable for a user.
In this embodiment, the resistance mechanism 7 includes a ratchet 71 and a positioning pawl 72, the ratchet 71 and the rotation shaft set 5 are in a same rotation relationship, the positioning pawl 72 is movably disposed on the movable member 3, and when the cap unit 8 moves from the second position toward the first position, the cap unit 8 drives the positioning pawl 72 to engage with the ratchet 71, so that the resistance mechanism 7 has the first resistance, and the occurrence of chain flinging caused by the inversion of the chain guide 4 due to road jolt can be sufficiently suppressed. When the cap screwing unit 8 moves from the first position toward 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, and the positioning pawl 72 can be disengaged from the ratchet 71 without being engaged with each other, so that the chain guide 4 is in linkage relation with the resistance mechanism 7.
It should be noted that the rear derailleur further includes a linkage mechanism 9, and the cap screwing unit 8 is coupled to 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, wherein the elastic member 92 is elastically supported 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 relationship; when the cap screwing unit 8 moves from the second position toward the first position, the cap screwing 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, whereas when the cap screwing unit 8 moves from the first position toward the second position, the elastic member 92 is not extruded and stretched, and at this moment, the pushing member 91 can release the ratchet 71 under the action of gravity, or the ratchet 71 can rotate to push the positioning pawl 72 reversely to drive the pushing member 91 to move reversely.
In this embodiment, the pushing member 91 is in a sleeve shape, and one end of the elastic member 92 is inserted into the pushing member 91, and the other end is inserted into a concave hole 81 of the cap screwing unit 8, so that the elastic member 92 can be effectively limited to avoid falling off.
The screw cap unit 8 comprises a base 83 and a screw cap body 84, the base 83 is detachably assembled on the movable member 3, the base 83 comprises an actuating space 831, the resistance mechanism 7 is accommodated in the actuating space 831 to block foreign matters (such as dust, small broken stone and muddy water … …), so as to ensure smooth action of the resistance mechanism 7, the screw cap body 84 can be relatively and rotatably covered on the base 83 and covers the actuating space 831 to block the foreign matters in an omnibearing manner, and the screw cap body 84 can be rotatably positioned at a first position and a second position; wherein the elastic member 92 is elastically supported 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, and the other 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 in 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 this embodiment, the cap 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 a spring element, and the second positioning unit 34 and the third positioning unit 35 are grooves.
Claims (8)
1. A rear derailleur, characterized in that: comprising the following steps: a base member mounted to the bicycle; a link assembly provided to the base member; a movable component pivoted to the connecting rod assembly; a chain guide pivotally connected to the movable member via a rotation shaft; a deflection element arranged 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 arranged on the movable component; and
The rotary cover unit is covered by the resistance mechanism and can act on the resistance mechanism, the rotary cover unit can be rotatably positioned at a first position and a second position, the resistance mechanism has a first resistance when the rotary cover unit is rotated at the first position, the resistance mechanism has a second resistance when the rotary cover unit is rotated at the second position, and the second resistance is different from the first resistance in size;
the resistance mechanism comprises a ratchet wheel and a positioning pawl, the ratchet wheel and the rotating shaft form the same rotation relationship, the positioning pawl is movably arranged on the movable member, when the spiral cover unit moves from the second position towards the first position, the spiral cover unit drives the positioning pawl to be meshed with the ratchet wheel, and when the spiral cover unit moves from the first position towards the second position, the spiral cover unit releases the positioning pawl, and the positioning pawl can be separated from the ratchet wheel without being meshed with each other;
the device also comprises a linkage mechanism, 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 towards the first position, the cap screwing unit drives the pushing piece to push the positioning pawl to be meshed with the ratchet wheel.
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 rotation shaft set are in the same rotation relationship.
4. The rear derailleur according to claim 1, wherein: the resistance mechanism is sleeved on the rotating shaft group.
5. The rear derailleur according to claim 1, wherein: the cap screwing unit is rotatable 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, characterized in that: the rotary cover unit can be operated by the outside and is covered by the resistance mechanism, and when the rotary cover unit is operated at the first position, the chain guide is less easy to rotate than when the rotary cover unit is positioned at the second position.
8. The rear derailleur according to any one of claims 1 to 6, characterized in that: the rotary cover unit can be operated by the outside and is covered by the resistance mechanism, and when the rotary cover unit is operated at the second position, the chain guide is easier to rotate than when the rotary cover unit is positioned at the first position.
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 CN115071879A (en) | 2022-09-20 |
| CN115071879B true 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 (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406643A (en) * | 1979-12-19 | 1983-09-27 | Shimano Industrial Company Limited | Derailleur for a bicycle |
| 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 |
| 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 |
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8870693B2 (en) * | 2012-05-21 | 2014-10-28 | Shimano, Inc. | Bicycle derailleur with rotation resistance and tactile feedback |
| US11319021B2 (en) * | 2017-08-23 | 2022-05-03 | Shimano Inc. | Bicycle rear derailleur |
-
2022
- 2022-05-30 CN CN202210600666.5A patent/CN115071879B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406643A (en) * | 1979-12-19 | 1983-09-27 | Shimano Industrial Company Limited | Derailleur for a bicycle |
| 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 |
| 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 |
| 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 |
|---|---|
| CN115071879A (en) | 2022-09-20 |
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