CN112158293B - Rear speed-changing guide wheel position adjusting tool - Google Patents
Rear speed-changing guide wheel position adjusting tool Download PDFInfo
- Publication number
- CN112158293B CN112158293B CN202010951043.3A CN202010951043A CN112158293B CN 112158293 B CN112158293 B CN 112158293B CN 202010951043 A CN202010951043 A CN 202010951043A CN 112158293 B CN112158293 B CN 112158293B
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- guide wheel
- virtual circle
- abutting
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- clamping
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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
- B62M9/16—Tensioning or adjusting equipment for chains, belts or the like
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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
- B62M9/124—Mechanisms for shifting laterally
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0072—Wheeled or endless-tracked vehicles the wheels of the vehicle co-operating with rotatable rolls
- G01M17/0076—Two-wheeled vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
The invention relates to a rear speed-changing guide wheel position adjusting tool, which is used for a rear speed-changing system, wherein the rear speed-changing system comprises a plurality of flywheels and a rear speed changer, the rear speed changer comprises a guide wheel, and the rear speed-changing guide wheel position adjusting tool is used for assisting a user to adjust the distance between the guide wheel and the flywheels. The adjusting tool for the position of the rear speed-changing guide wheel can provide an adjusting reference, so that a rider can accurately adjust the distance between the guide wheel and the flywheel, and further a better speed-changing switching speed is achieved.
Description
Technical Field
The present invention relates to a bicycle calibration tool, and more particularly to a rear derailleur idler position adjustment tool.
Background
After the rear derailleur is assembled to the bicycle, it needs to be calibrated to fully cooperate with the surrounding components, such as the flywheel, the chain …, etc., to achieve the most suitable usage status. Therefore, the adjusting structure of the rear derailleur is designed with a low adjusting screw, a high adjusting screw, a tension fine adjusting knob of the shift cable, a tension adjusting screw, etc. for the adjustment of the rider. The tension adjusting screw is used for adjusting the distance between the guide wheel and the flywheel sheet, so that the speed during gear shifting can be controlled, and the closer the distance is, the faster the gear shifting speed is.
However, the guide wheel and the flywheel are not close to each other, and if the guide wheel is too close to the flywheel, the chain is excessively extruded, so that adverse phenomena such as unsmooth rotation, noise and the like are caused. However, the adjustment of the distance between the guide wheel and the flywheel is performed completely by the rider, so the inexperienced rider does not have any basis for adjustment, resulting in poor adjustment.
Therefore, there is a need to provide a novel and improved rear derailleur idler position adjustment tool to solve the above problems.
Disclosure of Invention
The main objective of the present invention is to provide a rear speed-changing guide wheel position adjustment tool, which can provide an adjustment reference, so that a rider can accurately adjust the distance between the guide wheel and the flywheel, thereby achieving a better speed-changing switching speed.
To achieve the above object, the present invention provides a rear transmission guide wheel position adjusting tool for a rear transmission system, the rear transmission system including a plurality of flywheels and a rear derailleur, the rear derailleur including a guide wheel, the rear transmission guide wheel position adjusting tool including: a main body, a positioning structure and an alignment portion. The positioning structure is arranged on the body and can be detachably positioned on the guide wheel, the positioning structure comprises at least one inserting space and at least one clamping and abutting part, the at least one inserting space is used for accommodating the tooth part of the guide wheel, and the at least one clamping and abutting part is used for being embedded into the tooth groove of the guide wheel; the alignment part is arranged on the body and is separated from the positioning structure by a preset distance, and the tooth part of the flywheel is aligned by the alignment part; the number of the at least one clamping and abutting part is plural, the number of the at least one plugging space is plural, the plurality of clamping and abutting parts are arranged at equal intervals along a first virtual circle, and two adjacent clamping and abutting parts jointly define the plugging space.
Preferably, the body includes a first base portion and a second base portion, the second base portion integrally extends to the first base portion to define an accommodating space, the accommodating space is communicated with the at least one inserting space, and the accommodating space is used for accommodating the guide wheel.
Preferably, the thickness of the at least one clamping and abutting part is larger than that of the tooth part of the guide wheel.
Preferably, the body further comprises a holding portion, and the holding portion is opposite to the second base portion and protrudes from the first base portion.
Preferably, the first virtual circle and a second virtual circle are configured in a concentric circle, the radius of the first virtual circle is smaller than that of the second virtual circle, a front wall of each engaging portion is aligned with the contour of the first virtual circle, and a rear wall of each engaging portion is aligned with the contour of the second virtual circle; the front wall faces the center of the first virtual circle, the rear wall faces away from the center of the first virtual circle, and the direction of a connecting line of the front wall and the rear wall is the thickness direction of the clamping part.
Preferably, the aligning portion is protruded from the body along an extending direction, and the aligning portion includes an abutting surface against which a tooth portion of the flywheel abuts.
Preferably, the body portion is plate-shaped, the alignment portion protrudes from the plate-shaped portion, and a height defining the alignment portion extends along the extending direction, and in the extending direction, the height is greater than the thickness of each flywheel.
Preferably, the flywheels have different sizes, and a width of the alignment portion is defined perpendicular to the extending direction, and the width is not smaller than the pitch of the largest size of the flywheels.
Preferably, the body includes a first base and a second base, the second base integrally extends to the first base to define a receiving space, the receiving space is communicated with the inserting space, the receiving space is used for receiving the guide wheel, a step portion is formed at the connecting position of the first base and the second base, and the end surface of the first base is higher than the end surface of the second base; wherein, the positioning structure is arranged on the first base part, and the alignment part is arranged on the second base part; the step part comprises an inclined surface which is connected with the end surface of the first base part and the end surface of the second base part, and the inclined surface inclines towards the clamping and abutting part so as to guide the tooth part of the guide wheel to abut against the clamping and abutting part; the body further comprises a holding part, and the holding part is opposite to the second base part and protrudes out of the first base part; each clamping and abutting part is of a columnar structure, each clamping and abutting part continuously tapers from the rear wall to the front wall, two side walls of each clamping and abutting part are respectively connected with the front wall and the rear wall in an arc shape, the side walls of two adjacent clamping and abutting parts jointly define the inserting space, and the two side walls are used for guiding the tooth part of the guide wheel to enter the inserting space; the alignment part extends along the outline of a third virtual circle which is arranged concentrically with the first virtual circle; the aligning part is extended to the body along an extending direction and comprises an abutting surface for abutting against a tooth part of the flywheel; the second base part is plate-shaped, the holding part is plate-shaped, and the end surface of the holding part is flush with the end surface of the first base part; a hanging hole is arranged through the holding part; an installation indicating part is arranged on the holding part; the ratio of the radius of the second virtual circle to the radius of the first virtual circle is between 1.2 and 1.4; the ratio of the radius of the third virtual circle to the radius of the first virtual circle is between 1.7 and 1.9; the rear speed changing system also comprises a chain, the accommodating space is used for the chain to pass through, and part of the aligning part is used for abutting against the chain; the part of the body is plate-shaped, the aligning part protrudes to the plate-shaped part, and a height of the aligning part is defined to extend along the extending direction, and in the extending direction, the height is larger than the thickness of the plate-shaped part of the body; the flywheels are different in size, a width of the alignment part is defined to be perpendicular to the extending direction, and the size of the width is not smaller than the tooth pitch of the flywheels with the maximum size; the thickness of the at least one clamping and abutting part is larger than that of the tooth part of the guide wheel.
The invention has the advantages that:
the adjusting tool for the position of the rear speed-changing guide wheel can provide an adjusting reference, so that a rider can accurately adjust the distance between the guide wheel and the flywheel, and further a better speed-changing switching speed is achieved.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a side view of fig. 1.
Fig. 4 is a perspective view of another angle of view according to an embodiment of the present invention.
FIG. 5 is a schematic view of the assembly of the present invention.
Fig. 6 and 7 are usage status diagrams of an embodiment of the invention.
Fig. 8 is a schematic diagram of a calibrated position according to an embodiment of the present invention.
Detailed Description
The following description is given by way of example only, and is not intended to limit the scope of the invention.
Referring to fig. 1 to 8, which illustrate an embodiment of the present invention, a rear transmission guide wheel position adjusting tool of the present invention is provided for a rear transmission system 6, the rear transmission system 6 includes a plurality of flywheels 61 and a rear derailleur 62, the rear derailleur 62 includes a guide wheel 63, and the rear transmission guide wheel position adjusting tool includes: a main body 1, a positioning structure 3 and an alignment part 4.
The positioning structure 3 is disposed on the body 1 for being separably positioned on the guide wheel 63, and specifically, the positioning structure 3 includes at least one insertion space 31 and at least one engaging portion 32, the at least one insertion space 31 is for accommodating a tooth portion of the guide wheel 63, and the at least one engaging portion 32 is for being embedded into a tooth groove of the guide wheel 63; the thickness of the at least one engaging portion 32 is greater than the thickness of the tooth portion of the guide wheel 63, so as to ensure that the tooth portion of the guide wheel 63 can be laterally engaged with the sufficient thickness. The aligning portion 4 is disposed on the body 1 and spaced a predetermined distance from the positioning structure 3, and the aligning portion 4 is used for aligning the teeth of the flywheel 61.
In practical use, the user positions the rear speed-changing guide wheel position adjusting tool behind the guide wheel 63 through the positioning structure 3, and the user can leave two hands free, so that the user can adjust and perform other actions while performing subsequent adjustment, such as adjusting by one hand and taking other tools by the other hand. Moreover, the user can move to any position freely for viewing, so as to accurately grasp the distance change between the guide wheel 63 and the flywheel 61, and the adjustment is completed when the tooth part of the flywheel 61 is aligned with the alignment part 4.
More specifically, the body 1 includes a first base portion 11 and a second base portion 12, the second base portion 12 integrally extends to the first base portion 11 to define a receiving space 14, the receiving space 14 is communicated with the at least one inserting space 31, the receiving space 14 is used for receiving the guide wheel 63, a step portion 13 is formed at a connection portion of the first base portion 11 and the second base portion 12, and an end surface of the first base portion 11 is higher than an end surface of the second base portion 12; the positioning structure 3 is disposed on the first base portion 11, and the alignment portion 4 is disposed on the second base portion 12.
It should be emphasized that, in the present embodiment, the alignment portion 4 is protruded from the body 1 along an extending direction 7, the alignment portion 4 includes an abutting surface 41, the abutting surface 41 is abutted by a tooth portion of the flywheel 61, the abutting surface 41 can stop the flywheel 61 from moving, so that the user can immediately know that the adjustment is to the preferred position at the moment of the contact, and the user does not need to look at the preferred position all the time.
More specifically, the portion of the body 1 (the second base 12) is plate-shaped, the alignment portion 4 protrudes in the plate-shaped position, a height 42 defining the alignment portion 4 extends along the extending direction 7, and in the extending direction 7, the height 42 is greater than the thickness of each flywheel 61; more specifically, the flywheels 61 are different in size, a width 43 of the aligning portion 4 is defined to be perpendicular to the extending direction 7, and the size of the width 43 is not smaller than the pitch of the largest size of the flywheels 61.
In addition, the second base 12 is plate-shaped, which is advantageous for extending into a narrow space, so that the user can mount the device smoothly. Moreover, the step portion 13 includes an inclined surface 131, the inclined surface 131 connects the end surface of the first base portion 11 and the end surface of the second base portion 12, and the inclined surface 131 inclines toward the engaging portion 32 to guide the tooth portion of the guide wheel 63 to abut against the engaging portion 32.
It is understood that the rear derailleur 6 further includes a chain 64, the accommodating space 14 is used for accommodating the guide wheel 63 and allowing the chain 64 to pass through, when the rear derailleur guide wheel position adjusting tool is positioned at the guide wheel 63, a user can selectively allow a portion of the aligning portion 4 to abut against the chain 64 for an additional adjustment; in other words, when the guide pulley 63 and the flywheel 61 are adjusted, the aligning portion 4 is interposed between the chain 64 and the flywheel 61.
Preferably, the main body 1 further includes a holding portion 2 for the user to take and mount on the guide wheel 63, in this embodiment, the holding portion 2 is plate-shaped, the holding portion 2 protrudes from the first base portion 11 opposite to the second base portion 12, and the end surface of the holding portion 2 is flush with the end surface of the first base portion 11.
Preferably, a hanging hole 21 is formed through the holding portion 2, and the hanging hole 21 can be used for hanging and positioning when not in use, so as to facilitate storage and avoid loss.
Further preferably, an installation indication portion 22 is provided on the holding portion 2 to assist the user to know the direction of installation on the guide wheel 63.
The number of the at least one engaging portion 32 is plural, the number of the at least one inserting space 31 is plural, each engaging portion 32 is a cylindrical structure, it should be mentioned that the plural engaging portions 32 are arranged at equal intervals along a first virtual circle 51, and two adjacent engaging portions 32 define a inserting space 31 together. Therefore, when the rear gearshift guide wheel position adjusting tool is positioned on the guide wheel 63, the adjacent two engaging portions 32 will clamp the teeth of the guide wheel 63, so as to achieve the positioning purpose.
Further, the first virtual circle 51 and a second virtual circle 52 are concentrically arranged, the radius of the first virtual circle 51 is smaller than the radius of the second virtual circle 52, a front wall 321 of each engaging portion 32 is aligned with the contour of the first virtual circle 51, and a rear wall 322 of each engaging portion 32 is aligned with the contour of the second virtual circle 52; the front wall 321 faces the center of the first virtual circle 51, the rear wall 322 faces away from the center of the first virtual circle 51, and a connection line between the front wall 321 and the rear wall 322 is a thickness direction of the engaging portion 32.
More specifically, the thickness of the engaging portion 32 is the depth of the tooth slot that can be inserted into the guide wheel 63, and in the present embodiment, the ratio of the radius of the second virtual circle 52 to the radius of the first virtual circle 51 is preferably between 1.2 and 1.4, so as to satisfy the different types of tooth slot depths of the guide wheel 63 currently on the market. Moreover, the alignment portion 4 extends along the contour of a third virtual circle 53, the third virtual circle 53 and the first virtual circle 51 are concentrically arranged, so that a designer can accurately control and calculate the predetermined separation distance between the guide wheel 63 and the flywheel 61 during the manufacturing process, in this embodiment, the ratio of the radius of the third virtual circle 53 to the radius of the first virtual circle 51 is between 1.7 and 1.9.
Preferably, each of the engaging portions 32 is continuously tapered from the rear wall 322 toward the front wall 321, two side walls 323 of each engaging portion 32 are curved to connect the front wall 321 and the rear wall 322, the side walls 323 of two adjacent engaging portions 32 define the inserting space 31, and the two side walls 323 guide the teeth of the guide wheel 63 to smoothly enter the inserting space 31.
The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.
Claims (9)
1. A rear speed-changing guide wheel position adjusting tool is characterized in that the rear speed-changing system is used for a rear speed-changing system, the rear speed-changing system comprises a plurality of flywheels and a rear speed changer, the rear speed changer comprises a guide wheel, and the rear speed-changing guide wheel position adjusting tool comprises:
a body;
the positioning structure is arranged on the body and can be detachably positioned on the guide wheel, and comprises at least one inserting space and at least one clamping and abutting part, the inserting space is used for accommodating the tooth part of the guide wheel, and the at least one clamping and abutting part is used for being embedded into the tooth groove of the guide wheel; and
the aligning part is arranged on the body and is separated from the positioning structure by a preset distance, so that the tooth part of the flywheel is aligned;
the number of the at least one clamping and abutting part is plural, the number of the at least one plugging space is plural, the plurality of clamping and abutting parts are arranged at equal intervals along a first virtual circle, and two adjacent clamping and abutting parts jointly define the plugging space.
2. The tool as claimed in claim 1, wherein the body includes a first base portion and a second base portion, the second base portion integrally extends from the first base portion to define a receiving space, the receiving space is connected to the at least one insertion space, and the receiving space is for receiving the guide wheel.
3. The adjusting tool for adjusting the position of the rear derailleur guide pulley of claim 1, wherein the at least one engaging portion has a thickness greater than a thickness of the tooth portion of the guide pulley.
4. The rear derailleur alignment tool of claim 2, wherein the body further includes a grip portion projecting from the first base opposite the second base.
5. The adjusting tool for adjusting the position of the rear speed-changing guide wheel as claimed in claim 1, wherein the first virtual circle and a second virtual circle are concentrically arranged, the radius of the first virtual circle is smaller than that of the second virtual circle, a front wall of each engaging portion is aligned with the contour of the first virtual circle, and a rear wall of each engaging portion is aligned with the contour of the second virtual circle; the front wall faces the center of the first virtual circle, the rear wall faces away from the center of the first virtual circle, and the direction of a connecting line of the front wall and the rear wall is the thickness direction of the clamping part.
6. The rear derailleur adjusting tool of any one of claims 1-5, wherein the alignment portion is protruded from the body in an extending direction, the alignment portion includes an abutting surface against which a tooth portion of the flywheel abuts.
7. The rear derailleur guide roller position adjustment tool of claim 6, wherein the body portion is plate-shaped, the alignment portion protrudes in the plate-shape, and a height defining the alignment portion extends in the extending direction, the height being greater than a thickness of each of the flywheels in the extending direction.
8. The rear derailleur idler position adjustment tool of claim 6, wherein the flywheels differ in size, defining a width of the alignment portion perpendicular to the extension direction, the width being not less than a pitch of the largest sized flywheels.
9. The tool for adjusting the position of the rear derailleur pulley as claimed in claim 5, wherein the body includes a first base portion and a second base portion, the second base portion integrally extends to the first base portion to define a receiving space, the receiving space is connected to the insertion space, the receiving space is used for receiving the pulley, a step portion is formed at a connection portion of the first base portion and the second base portion, and an end surface of the first base portion is higher than an end surface of the second base portion; wherein, the positioning structure is arranged on the first base part, and the alignment part is arranged on the second base part; the step part comprises an inclined surface which is connected with the end surface of the first base part and the end surface of the second base part, and the inclined surface inclines towards the clamping and abutting part so as to guide the tooth part of the guide wheel to abut against the clamping and abutting part; the body further comprises a holding part, and the holding part is opposite to the second base part and protrudes out of the first base part; each clamping and abutting part is of a columnar structure, each clamping and abutting part continuously tapers from the rear wall to the front wall, two side walls of each clamping and abutting part are respectively connected with the front wall and the rear wall in an arc shape, the side walls of two adjacent clamping and abutting parts jointly define the inserting space, and the two side walls are used for guiding the tooth part of the guide wheel to enter the inserting space; the alignment part extends along the outline of a third virtual circle which is arranged concentrically with the first virtual circle; the aligning part is extended to the body along an extending direction and comprises an abutting surface for abutting against a tooth part of the flywheel; the second base part is plate-shaped, the holding part is plate-shaped, and the end surface of the holding part is flush with the end surface of the first base part; a hanging hole is arranged through the holding part; an installation indicating part is arranged on the holding part; the ratio of the radius of the second virtual circle to the radius of the first virtual circle is between 1.2 and 1.4; the ratio of the radius of the third virtual circle to the radius of the first virtual circle is between 1.7 and 1.9; the rear speed changing system also comprises a chain, the accommodating space is used for the chain to pass through, and part of the aligning part is used for abutting against the chain; the part of the body is plate-shaped, the aligning part protrudes to the plate-shaped part, and a height of the aligning part is defined to extend along the extending direction, and in the extending direction, the height is larger than the thickness of the plate-shaped part of the body; the flywheels are different in size, a width of the alignment part is defined to be perpendicular to the extending direction, and the size of the width is not smaller than the tooth pitch of the flywheels with the maximum size; the thickness of the at least one clamping and abutting part is larger than that of the tooth part of the guide wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951043.3A CN112158293B (en) | 2020-09-11 | 2020-09-11 | Rear speed-changing guide wheel position adjusting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951043.3A CN112158293B (en) | 2020-09-11 | 2020-09-11 | Rear speed-changing guide wheel position adjusting tool |
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| Publication Number | Publication Date |
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| CN112158293A CN112158293A (en) | 2021-01-01 |
| CN112158293B true CN112158293B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010951043.3A Active CN112158293B (en) | 2020-09-11 | 2020-09-11 | Rear speed-changing guide wheel position adjusting tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022133553A1 (en) | 2022-12-15 | 2024-06-20 | Shimano Inc. | TOOLS AND DERAILLEURS |
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| CN2222121Y (en) * | 1995-05-10 | 1996-03-13 | 邦格企业股份有限公司 | Bicycle chain tension aid |
| US6117032A (en) * | 1998-02-13 | 2000-09-12 | Shimano, Inc. | Protective plate for bicycle chain |
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| CN101289112A (en) * | 2007-04-19 | 2008-10-22 | 株式会社岛野 | Bicycle part positioning device |
| EP2110304A1 (en) * | 2008-04-17 | 2009-10-21 | CAMPAGNOLO S.r.l. | Bicycle derailleur |
| CN104108454A (en) * | 2013-04-19 | 2014-10-22 | 坎培诺洛有限公司 | Device For Mounting A Front Derailleur On A Bicycle Frame And Method For Mounting Such A Front Derailleur |
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| CN205352709U (en) * | 2016-01-15 | 2016-06-29 | 上海汽车变速器有限公司 | A tight frock of bar cramp of shifting gears for $putting in order car capability test that shifts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022133553A1 (en) | 2022-12-15 | 2024-06-20 | Shimano Inc. | TOOLS AND DERAILLEURS |
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| Publication number | Publication date |
|---|---|
| CN112158293A (en) | 2021-01-01 |
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