CN108284914B - Bicycle chain pulling structure and bicycle - Google Patents
Bicycle chain pulling structure and bicycle Download PDFInfo
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- CN108284914B CN108284914B CN201810144397.XA CN201810144397A CN108284914B CN 108284914 B CN108284914 B CN 108284914B CN 201810144397 A CN201810144397 A CN 201810144397A CN 108284914 B CN108284914 B CN 108284914B
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- 230000008859 change Effects 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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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
- B62M9/121—Rear derailleurs
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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
- B62M1/00—Rider propulsion of wheeled vehicles
- B62M1/10—Rider propulsion of wheeled vehicles involving devices which enable the mechanical storing and releasing of energy occasionally, e.g. arrangement of flywheels
-
- 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
- B62M9/126—Chain guides; Mounting thereof
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention provides a bicycle chain shifting structure and a bicycle, wherein the bicycle chain shifting structure comprises a frame with a first rear fork and a second rear fork, a hub shaft straddling between the first rear fork and the second rear fork, a first sprocket wheel rotatably connected to the middle part of the frame around the axis of the first sprocket wheel, a hub shell sleeved on the hub shaft and rotatably connected with the hub shaft, a flywheel set sleeved on the hub shell, a chain derailleur and chains respectively connected with the first sprocket wheel, the flywheel set and a chain tensioning unit. The flywheel set is located between first rear fork and the second rear fork, and the derailleur includes fixing base and Zhang Lian unit that is connected with first rear fork, and the fixing base is provided with the guide pillar towards the flywheel set, zhang Lian unit and guide pillar slidable connection. A bicycle including the bicycle derailleur structure. The bicycle derailleur structure and the bicycle have the advantages of simple and reliable structure, low production cost and capability of protecting the derailleur.
Description
Technical Field
The invention relates to the technical field of bicycles, in particular to a bicycle chain shifting structure and a bicycle comprising the same.
Background
The rear derailleur of the bicycle is assembled on a rear bottom fork of a bicycle frame and is used for being matched with a combined variable-speed gear arranged on the bicycle, and a chain is shifted through the rear derailleur to be meshed with gears with different sizes, so that the gear shifting and speed changing of the bicycle are realized. When the bicycle is shifted, the shift wire is pulled by the shift adjuster, so that the connecting rod structure of the rear derailleur is deformed, moved and drives the chain guide to deviate, thereby pushing the chain to be meshed with different gears. The rear derailleur of bicycle is mainly installed on mountain bike or highway bicycle, satisfies people's motion's demand. Of course, with the rising of sharing bicycles, there are also some simple bicycles to be additionally provided with accessories such as a combined speed-changing gear, a rear derailleur, a gear shifter and the like, so as to improve the experience of the rider in the riding process.
The invention patent application with the application number of CN201610146295.2 discloses a bicycle hydraulic rear derailleur, which mainly pushes a sliding sleeve seat to move through an oil cylinder seat and a piston, and further drives a guide wheel bracket on the sliding sleeve seat to move, so that different chain wheels of a chain and a cone pulley are meshed. However, the hydraulic rear derailleur for a bicycle is not suitable for flywheel groups with more than six flywheels, because when the number of the flywheels is too large, the diameter difference between the flywheels is too large, so that the sliding type gear shifting structure has the problem of unsmooth connection. Furthermore, the bicycle hydraulic rear derailleur needs to be additionally provided with an adjusting screw pair to change the moving range of the guide wheel bracket, so that the complexity of a derailleur structure is increased, and the bicycle hydraulic rear derailleur is adopted to realize the derailleur operation through a hydraulic mechanism, so that the production cost is high, the situation of oil leakage easily occurs, and the reliability of the bicycle hydraulic rear derailleur is further poor.
In addition, whether it is a mountain bike, a road bike or a simple bike, the rear derailleur is mounted on the outside of the rear bottom fork of the bicycle frame, so that the rear derailleur is very easy to collide or strike, especially when a crash occurs, the rear derailleur of the bicycle directly strikes against the ground or broken stone, and the rear derailleur is very easy to damage. Furthermore, the crank of current derailleur all sets up towards the bicycle afterbody in the use for the bicycle frame can't carry out effectual protection to the crank, leads to the crank to expose outside the frame for a long time, receives foreign object striking easily, further increases its impaired risk.
Disclosure of Invention
In order to solve the above problems, a primary object of the present invention is to provide a bicycle derailleur structure that is simple and reliable in structure, low in manufacturing cost, and capable of protecting the derailleur.
Another object of the present invention is to provide a bicycle that is simple and reliable in construction, low in manufacturing costs, and capable of protecting the derailleur.
In order to achieve the main object of the present invention, there is provided a bicycle derailleur structure including a frame having a first rear fork and a second rear fork disposed opposite to each other, a hub axle straddling between the first rear fork and the second rear fork, a first sprocket rotatably coupled to a middle portion of the frame about an axis thereof, a hub shell rotatably coupled to the hub axle about an axis thereof, and a hub shell rotatably coupled to the hub axle, wherein the bicycle derailleur structure further includes a flywheel set, a derailleur and a chain, the flywheel set being mounted to an end of the hub shell adjacent to the first rear fork, the flywheel set being located between the first rear fork and the second rear fork, the derailleur including a fixing base and a Zhang Lian unit, the fixing base having a receiving groove in a middle portion thereof, the first rear fork being located in the receiving groove, the fixing base being extendingly provided with a guide post toward the flywheel set, the Zhang Lian unit being slidably coupled to the guide post along the axis thereof, the chain tensioning unit being located on a side of the fixing base adjacent to the hub shell, the chain tensioning unit being respectively coupled to the first sprocket, the second sprocket and the chain tensioning unit.
From the above, the chain tensioning unit of the derailleur is arranged on one side, close to the hub shell, of the fixing seat of the derailleur, the Zhang Lian unit can be protected by the fixing seat of the derailleur, in addition, the flywheel set is arranged between the first rear fork and the second rear fork, the flywheel set can be protected by the first rear fork and the second rear fork of the bicycle, meanwhile, the Zhang Lian unit matched with the flywheel set is ensured to be also positioned between the first rear fork and the second rear fork, the first rear fork and the second rear fork can further protect the Zhang Lian unit of the derailleur, a rider can not touch and collide with the chain tensioning unit in the daily use process, and in addition, the structure can also enable the rider to collide with the fixing seat of the derailleur and the first rear fork of the frame at first time when the bicycle falls down, the bicycle can not directly collide with the Zhang Lian unit, and further the fragile Zhang Lian unit is protected, and the Zhang Lian unit is prevented from being damaged. Therefore, the bicycle chain-pulling structure has the advantages of simple and reliable structure, low production cost and capability of protecting the derailleur, and the structure design of the bicycle chain-pulling structure ensures that the bicycle chain-pulling structure does not need to be additionally provided with an adjusting screw, thereby simplifying the bicycle chain-pulling structure.
The chain tensioning unit comprises a sliding seat, a crank, a first guide wheel, a second guide wheel, a first elastic piece and a second elastic piece, wherein the sliding seat is connected with the guide pillar in a sliding manner along the axial direction of the guide pillar, one side, facing the flywheel set, of the sliding seat is provided with a mounting frame, a first end of the crank is hinged with the sliding seat, the crank is positioned between the hub shell and the sliding seat, the first guide wheel is rotatably connected with the mounting frame around the axis of the crank, the first guide wheel is meshed with a chain, the second guide wheel is rotatably connected with a second end of the crank around the axis of the second guide wheel, the second guide wheel is meshed with the chain, the axis of the first guide wheel and the axis of the second guide wheel are parallel to the axis of the hub shaft, the first elastic piece is connected between the fixing seat and the sliding seat, and the second elastic piece is connected between the sliding seat and the crank.
From the above, the sliding seat can drive the crank, the first guide wheel and the second guide wheel arranged at the second end of the crank to integrally move, so that the chain is shifted to different second chain wheels of the flywheel set, the chain is meshed with the different second chain wheels, and the speed change operation is realized. The first elastic piece is used for resetting the sliding seat, the second elastic piece is used for resetting the crank, so that the chain can have enough tension in any state, and the overall stability of the bicycle chain shifting structure is further ensured.
Still further scheme is, be provided with first wire casing and pulley on the fixing base, be provided with the recess on the perisporium of pulley, and the axis and the guide pillar mutually perpendicular of pulley are provided with second wire casing and fastener on the sliding seat, and the second wire casing sets up along the axial extension of guide pillar, and the pulley is located between the entry side of the export side of first wire casing and second wire casing, and the fastener is installed on the sliding seat, and the fastener passes the second wire casing.
From the above, the first wire groove is used for guiding the speed change wire connected with the chain tensioning unit, the second wire groove is used for accommodating the speed change wire, the fastener is used for fixing the speed change wire in the second wire groove, and the pulley is arranged, so that the pulley can reduce friction between the speed change wire and the derailleur when the speed change wire is pulled while changing the bending position of the speed change wire, and further smoothness when shifting gears is guaranteed.
Still further, the bicycle derailleur structure still includes selector and gear shift line, and the selector is installed on the handlebar of frame, and the first end and the selector of gear shift line are connected, and the gear shift line passes first wire casing, recess and second wire casing in proper order, and the second end and the fastener of gear shift line are connected.
From the above, the shifter can slide along the guide post through the sliding seat of the speed change wire control derailleur, and then stir the chain on the chain tensioning unit to different second chain wheels of the flywheel set, so that the chain is meshed with the different second chain wheels, and further speed change is realized.
Still further scheme is, still be provided with the stopper on the sliding seat, in the direction of resetting of crank, the stopper is located the lower reaches of crank.
From the above, the stopper can prevent that the crank from crossing the extreme position that resets when resetting under the potential energy effect of second elastic component, and then guarantees the stability of derailleur work.
Still further, the number of the second sprockets of the flywheel set is 2 to 5.
From the above, set up the quantity of the second sprocket of flywheel group for the structure of bicycle chain shifting structure can be compacter, and then avoid because the sliding connection between the sliding seat of derailleur and the fixing base causes the chain to appear switching unsmoothly or jump the chain, fall the problem of chain when switching to different second sprocket.
In order to achieve another object of the present invention, there is provided a bicycle comprising a bicycle derailleur structure including a frame having first and second rear forks disposed opposite to each other, a hub axle rotatably coupled to a middle portion of the frame about an axis thereof, a first sprocket rotatably coupled to the frame about the hub axle, and a hub shell rotatably coupled to the hub axle about the axis thereof, wherein the bicycle derailleur structure further includes a flywheel set, a derailleur and a chain, the flywheel set being mounted to an end of the hub shell adjacent to the first rear fork, and the flywheel set being disposed between the first and second rear forks, the derailleur including a fixing base and Zhang Lian units, the fixing base having a receiving slot in which the first rear fork is disposed, the fixing base being extendingly provided with a guide post toward the flywheel set, the Zhang Lian units being slidably coupled to the guide post in an axial direction thereof, and the chain tensioning unit being disposed on a side of the hub shell adjacent to the first sprocket, the chain tensioning unit and the chain being coupled to the first sprocket and the chain, respectively.
From the above, the chain tensioning unit of the derailleur is arranged on one side, close to the hub shell, of the fixing seat of the derailleur, the Zhang Lian unit can be protected by the fixing seat of the derailleur, in addition, the flywheel set is arranged between the first rear fork and the second rear fork, the flywheel set can be protected by the first rear fork and the second rear fork of the bicycle, meanwhile, the Zhang Lian unit matched with the flywheel set is ensured to be also positioned between the first rear fork and the second rear fork, the first rear fork and the second rear fork can further protect the Zhang Lian unit of the derailleur, a rider can not touch and collide with the chain tensioning unit in the daily use process, and in addition, the structure can also enable the rider to collide with the fixing seat of the derailleur and the first rear fork of the frame at first time when the bicycle falls down, the bicycle can not directly collide with the Zhang Lian unit, and further the fragile Zhang Lian unit is protected, and the Zhang Lian unit is prevented from being damaged. Therefore, the bicycle has the advantages of simple and reliable structure, low production cost and capability of protecting the derailleur, and the structure design of the bicycle derailleur structure ensures that the bicycle derailleur structure does not need to be additionally provided with an adjusting screw, thereby simplifying the bicycle derailleur structure.
The chain tensioning unit comprises a sliding seat, a crank, a first guide wheel, a second guide wheel, a first elastic piece and a second elastic piece, wherein the sliding seat is connected with the guide pillar in a sliding manner along the axial direction of the guide pillar, one side, facing the flywheel set, of the sliding seat is provided with a mounting frame, a first end of the crank is hinged with the sliding seat, the crank is positioned between the hub shell and the sliding seat, the first guide wheel is rotatably connected with the mounting frame around the axis of the crank, the first guide wheel is meshed with a chain, the second guide wheel is rotatably connected with a second end of the crank around the axis of the second guide wheel, the second guide wheel is meshed with the chain, the axis of the first guide wheel and the axis of the second guide wheel are parallel to the axis of the hub shaft, the first elastic piece is connected between the fixing seat and the sliding seat, and the second elastic piece is connected between the sliding seat and the crank.
From the above, the sliding seat can drive the crank, the first guide wheel and the second guide wheel arranged at the second end of the crank to integrally move, so that the chain is shifted to different second chain wheels of the flywheel set, the chain is meshed with the different second chain wheels, and the speed change operation is realized. The first elastic piece is used for resetting the sliding seat, the second elastic piece is used for resetting the crank, so that the chain can have enough tension in any state, and the overall stability of the bicycle chain shifting structure is further ensured.
Still further scheme is, be provided with first wire casing and pulley on the fixing base, be provided with the recess on the perisporium of pulley, and the axis and the guide pillar mutually perpendicular of pulley are provided with second wire casing and fastener on the sliding seat, and the second wire casing sets up along the axial extension of guide pillar, and the pulley is located between the entry side of the export side of first wire casing and second wire casing, and the fastener is installed on the sliding seat, and the fastener passes the second wire casing.
From the above, the first wire groove is used for guiding the speed change wire connected with the chain tensioning unit, the second wire groove is used for accommodating the speed change wire, the fastener is used for fixing the speed change wire in the second wire groove, and the pulley is arranged, so that the pulley can reduce friction between the speed change wire and the derailleur when the speed change wire is pulled while changing the bending position of the speed change wire, and further smoothness when shifting gears is guaranteed.
Still further, the bicycle derailleur structure still includes selector and gear shift line, and the selector is installed on the handlebar of frame, and the first end and the selector of gear shift line are connected, and the gear shift line passes first wire casing, recess and second wire casing in proper order, and the second end and the fastener of gear shift line are connected.
From the above, the shifter can slide along the guide post through the sliding seat of the speed change wire control derailleur, and then stir the chain on the chain tensioning unit to different second chain wheels of the flywheel set, so that the chain is meshed with the different second chain wheels, and further speed change is realized.
Drawings
FIG. 1 is a block diagram of an embodiment of a bicycle in accordance with the present invention.
FIG. 2 is a partial view of an embodiment of the bicycle of the present invention from a first perspective.
FIG. 3 is a partial view of an embodiment of the bicycle of the present invention from a second perspective.
FIG. 4 is a block diagram of a derailleur in accordance with an embodiment of the present invention in a first perspective.
FIG. 5 is a block diagram of a derailleur in accordance with an embodiment of the present invention in a second perspective view.
FIG. 6 is an exploded view of the derailleur of the bicycle embodiment of the present invention.
FIG. 7 is a block diagram of a fixed seat of a derailleur in accordance with an embodiment of the present invention.
FIG. 8 is a block diagram of a Zhang Lian unit of a derailleur of a bicycle embodiment of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Referring to fig. 1 to 3, the bicycle 100 includes a bicycle derailleur structure that includes a frame 1, a hub axle 21, a hub shell 22, a freewheel set 23, a chain 24, a first sprocket 25, a derailleur 3, a shifter 41 and a shift wire 42.
The frame 1 has a first rear fork 11 and a second rear fork 12 disposed opposite to each other, a hub axle 21 is straddled between the first rear fork 11 and the second rear fork 12, a hub shell 22 is sleeved on the hub axle 21, and the hub shell 22 is rotatably connected with the hub axle 21 about an axis of the hub axle 21. In addition, the hub shell 22 constitutes a wheel by spokes, rim and tire. The shifter 41 is mounted on a handlebar of the frame 1, a first end of a shift wire 42 is connected to the shifter 41, and a second end of the shift wire 42 is connected to the derailleur 3.
The flywheel set 23 is sleeved on a flywheel seat arranged on the hub shell 22 and can rotate unidirectionally with the flywheel seat and the hub shell 22, the flywheel set 23 is positioned on one end of the hub shell 22, which is close to the first rear fork 11 of the frame 1, and the flywheel set 23 is positioned between the first rear fork 11 and the second rear fork 12. The first sprocket 25 is rotatably connected to the middle portion of the frame 1 about its own rotation axis, and the chain 24 is connected to the first sprocket 25, the second sprocket 231 of the flywheel set 23, and the Zhang Lian unit 32 of the derailleur 3, respectively. Through setting up flywheel group 23 between first rear fork 11 and second rear fork 12 for flywheel group 23 can be located frame 1, is located between first rear fork 11 and the second rear fork 12 promptly, makes frame 1 protect flywheel group 23, and then avoids flywheel group 23 to be located frame 1 outward for flywheel group 23 is difficult for being knocked with.
Referring to fig. 4 to 8 in combination with fig. 2 and 3, the derailleur 3 includes fixing seats 31 and Zhang Lian units 32. The middle part of the fixing seat 31 is provided with a containing groove 311, the fixing seat 31 is fixedly connected with the first rear fork 11 of the frame 1, and the first rear fork 11 is positioned in the containing groove 311. Preferably, a limiting bump 315 is disposed on at least one groove wall of the accommodating groove 311, and the limiting bump 315 is used for being connected with a limiting clamping groove of the first rear fork 11 of the frame 1 in a matched manner, so that the derailleur 3 is prevented from rotating relative to the first rear fork 11 in the use process, and the stability of connection between the derailleur 3 and the first rear fork 11 is improved.
The fixing base 31 is provided with a guide post 312 extending toward the flywheel set 23, the Zhang Lian unit 32 is slidably connected with the guide post 312 along the axial direction of the guide post 312, and the Zhang Lian unit 32 is located at the inner side of the fixing base 31, that is, the chain tensioning unit 32 is located at the side of the fixing base close to the hub shell 22. In addition, the fixing base 31 is provided with a first wire groove 313 and a pulley 314, and the first wire groove 313 is used for accommodating the gear shift wire 42 and guiding the gear shift wire 42.
The peripheral wall of the pulley 314 is provided with a groove, which limits the gear line 42, so as to prevent the gear line 42 from being separated from the connection with the pulley 314, and the axis of the pulley 314 is perpendicular to the axis of the guide post 312 of the fixing seat 31.
Zhang Lian unit 32 includes a slide base 321, a crank 322, a first guide pulley 323, a second guide pulley 324, a first elastic member 325, and a second elastic member. The sliding seat 321 is slidably connected with the guide post 312 along the axial direction of the guide post 312 of the fixed seat 31, a second wire groove 3212 and a fastening piece 3213 are arranged on the sliding seat 321, wherein the second wire groove 3212 is arranged along the axial direction of the guide post 312 in an extending manner, the pulley 314 is positioned between the outlet side of the first wire groove 313 and the inlet side of the second wire groove 3212, the fastening piece 3213 is mounted on the sliding seat 321, and the fastening piece 3213 penetrates through the second wire groove 3212. Specifically, after sequentially passing through the first slot 313 of the fixed seat 31 and the groove of the pulley 314, the shift wire 42 enters and passes through the second slot 3212 of the sliding seat 321, and the fastener 3213 is connected to the second end of the shift wire 42 located in the second slot 3212, so as to fixedly connect the shift wire 42 with the sliding seat 321. The pulley 314 is used to change the bending position of the shift wire 42, so as to avoid that the shift wire 42 cannot normally pull the chain extension unit 32 to slide along the guide post 312 due to bending, thereby switching the position of the chain 24. In addition, the pulley 314 can reduce the friction between the shift wire 42 and the derailleur 3 when the shift wire 42 is pulled, thereby ensuring the smoothness in shifting gears.
When the bicycle 100 is required to be shifted or shifted, the winding or loosening of the shift wire 42 is adjusted by controlling the shifter 41, so that the shift wire 42 pulls the sliding seat 321 to slide along the guide post 312 of the fixed seat 31, and the Zhang Lian unit 32 shifts the position of the chain 24, so that the chain 24 is meshed with different second sprockets 231 of the flywheel set 23, and further the shifting or shifting of the bicycle 100 is realized.
In addition, a mounting frame 3211 is provided on a side of the sliding seat 321 facing the flywheel set, the first guide wheel 323 is rotatably connected to the mounting frame 3211 around its own axis, and the first guide wheel 323 is engaged with the chain 24. The first guide wheel 323 is a guide sprocket, and mainly plays a role in guiding the chain 24, namely, is used for stirring the chain 24 to be meshed with a different second sprocket 231 of the flywheel set 23, and the mounting frame 3211 plays a role in providing a mounting position for the first guide wheel 323 and also plays a role in limiting the chain 24 so as to prevent the chain 24 from being separated from being meshed with the first guide wheel 323.
The first end of the crank 322 is hinged to the sliding seat 321, and the crank 322 is located inside the fixed seat 31. The second guide wheel 324 is rotatably connected with the second end of the crank 322 around its own axis, and the second guide wheel 324 is engaged with the chain 24, and the second guide wheel 324 is a tensioning wheel, which is mainly used for compacting the chain 24, so that the chain 24 can keep enough pre-tightening force at any time, and further, the chain 24 is prevented from being disengaged from the flywheel set 23 and/or the first sprocket 25. In addition, the axes of the first guide pulley 323 and the second guide pulley 324 are parallel to the axis of the hub axle 21. Preferably, guard plates are provided on both sides of the second guide pulley 324 to prevent the chain 24 from being disengaged from the second guide pulley 324, thereby limiting the chain 24.
In another preferred embodiment, the crank 322 has a receiving cavity at a first end thereof, the second elastic member is disposed in the receiving cavity, and the second elastic member is connected between the sliding seat 321 and the crank 322. The second elastic member is used for resetting the crank 322, so that the second guide wheel 324 on the second end of the crank 322 can compress the chain 24, and further the chain 24 can maintain enough pre-tightening force at any time, thereby improving the riding stability of the bicycle 100. Wherein the second elastic member preferably adopts a torsion spring.
The first elastic member 325 is connected between the fixed seat 31 and the sliding seat 321, preferably, the fixed seat 31 is provided with a limiting bump 316 extending towards one surface of the sliding seat 321, the first elastic member 325 is sleeved on the limiting bump 316, and the limiting bump 316 plays a limiting role on the first elastic member 325 to prevent the first elastic member 325 from falling off from between the fixed seat 31 and the sliding seat 321. The first elastic member 325 preferably employs a compression spring.
The sliding seat 321 can drive the crank 322, the first guide wheel 323 and the second guide wheel 324 arranged at the second end of the crank 322 to integrally move, so that the chain 24 is shifted to the different second chain wheels 231 of the flywheel set 23, the chain 24 is meshed with the different second chain wheels 231, the first elastic piece 325 is used for resetting the sliding seat 321, and the Zhang Lian unit 32 is moved by matching the shifter 41 and the speed change line 42.
Preferably, the sliding seat 321 is further provided with a limiting block 3214, in the resetting direction of the crank 322, the limiting block 3214 is located at the downstream end of the crank 322, and the limiting block 3214 is used for limiting rotation of the crank 322, so that the crank 322 generates a certain pretightening force under the action of the second elastic member, and the installation position of the crank 322 is determined. In addition, the limiting block 3214 is further used for limiting the sliding seat 321, so that the crank 322 can be located at the inner side of the fixed seat 31, and further, when the bicycle 100 falls, the fixed seat 31 can collide with a foreign object to avoid the direct collision of the crank 322 with the foreign object, and the crank 322 is protected.
In addition, the number of the second sprockets 231 of the flywheel set 23 is preferably 2 to 5, so that the structure of the bicycle derailleur structure can be more compact, and further the problems of unsmooth switching or chain jump and chain drop of the chain 24 when switching to different second sprockets 231 due to sliding connection between the sliding seat 321 and the fixed seat 31 of the derailleur 3 are avoided.
It can be seen that, through setting up the position of derailleur and setting up the chain unit of derailleur in the inboard of fixing base for the fixing base of derailleur can protect Zhang Lian units, in addition, flywheel group sets up between first rear fork and second rear fork, when making flywheel group can be protected by the first rear fork and the second rear fork of bicycle, guarantees to lie in between first rear fork and the second rear fork with flywheel group complex Zhang Lian units too, and then makes first rear fork and second rear fork can further protect the Zhang Lian unit of derailleur, makes the rider can not bump, strike with chain unit in schedule use. Moreover, can also make when the bicycle appears falling the time through above-mentioned setting, the foreign object can strike with the fixing base of derailleur and the first rear fork of frame earlier, and then avoid the foreign object to strike with Zhang Lian unit directly, and then protect comparatively fragile Zhang Lian unit, avoid Zhang Lian unit damage for this bicycle and bicycle derailleur structure all have simple structure reliably, low in production cost and can protect the derailleur advantage.
Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the invention, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the invention, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the invention.
Claims (10)
1. A bicycle derailleur structure comprising:
the vehicle comprises a vehicle frame, a first rear fork and a second rear fork, wherein the vehicle frame is provided with the first rear fork and the second rear fork which are oppositely arranged;
a hub axle that rides between the first and second rear forks;
the first chain wheel is rotatably connected to the middle part of the frame around the axis of the first chain wheel;
the hub shell is sleeved on the hub shaft and is rotatably connected with the hub shaft around the axis of the hub shaft;
characterized in that the bicycle derailleur structure further comprises:
a flywheel set, which is sleeved on one end of the hub shell close to the first rear fork, and is positioned between the first rear fork and the second rear fork;
the chain is respectively connected with the first chain wheel and the second chain wheel of the flywheel set;
the derailleur, the derailleur includes fixing base and Zhang Lian unit, the fixing base with first rear fork is connected, the fixing base orientation flywheel group is provided with the guide pillar with extending, zhang Lian unit along the axial of guide pillar with the guide pillar slidable is connected, zhang Lian unit is located the fixing base is close to one side of hub shell, just Zhang Lian unit with the chain is connected, zhang Lian unit is used for being connected with the speed change line, the speed change line can pull Zhang Lian unit is followed the guide pillar slides.
2. The bicycle derailleur structure according to claim 1, wherein:
the chain tensioning unit includes:
the sliding seat is connected with the guide post in a sliding manner along the axial direction of the guide post, and a mounting frame is arranged on one side, facing the flywheel set, of the sliding seat;
a crank, a first end of which is hinged with the sliding seat;
the first guide wheel is rotatably connected with the mounting frame around the axis of the first guide wheel, and the first guide wheel is meshed with the chain;
the second guide wheel is rotatably connected with the second end of the crank around the axis of the second guide wheel, the second guide wheel is meshed with the chain, and the axis of the first guide wheel and the axis of the second guide wheel are parallel to the axis of the hub shaft;
the first elastic piece is connected between the fixed seat and the sliding seat;
the second elastic piece is connected between the sliding seat and the crank.
3. The bicycle derailleur structure according to claim 2, wherein:
the fixed seat is provided with a first wire groove and a pulley, the peripheral wall of the pulley is provided with a groove, and the axis of the pulley is mutually perpendicular to the guide post;
the sliding seat is provided with a second wire groove and a fastener, the second wire groove is arranged along the axial extension of the guide post, the pulley is positioned between the outlet side of the first wire groove and the inlet side of the second wire groove, the fastener is installed on the sliding seat, and the fastener penetrates through the second wire groove.
4. The bicycle derailleur structure according to claim 3, wherein:
the bicycle derailleur structure further includes:
a shifter mounted on a handlebar of the frame;
the gear shifting device comprises a gear shifting device, a gear shifting wire, a fastener and a gear shifting wire, wherein the gear shifting wire is connected with the gear shifting device at a first end, sequentially penetrates through the first wire groove, the groove and the second wire groove, and is connected with the fastener at a second end.
5. The bicycle derailleur structure according to claim 4, wherein:
and a limiting block is further arranged on the sliding seat, and is positioned at the downstream end of the crank in the resetting direction of the crank.
6. The bicycle derailleur structure according to any one of claims 1 to 5, characterized in that:
the number of the second sprockets of the freewheel group is 2 to 5.
7. A bicycle, said bicycle comprising a bicycle derailleur structure, said bicycle derailleur structure comprising:
the vehicle comprises a vehicle frame, a first rear fork and a second rear fork, wherein the vehicle frame is provided with the first rear fork and the second rear fork which are oppositely arranged;
a hub axle that rides between the first and second rear forks;
the first chain wheel is rotatably connected to the middle part of the frame around the axis of the first chain wheel;
the hub shell is sleeved on the hub shaft and is rotatably connected with the hub shaft around the axis of the hub shaft;
characterized in that the bicycle derailleur structure further comprises:
a flywheel set, which is sleeved on one end of the hub shell close to the first rear fork, and is positioned between the first rear fork and the second rear fork;
the chain is respectively connected with the first chain wheel and the second chain wheel of the flywheel set;
the derailleur, the derailleur includes fixing base and Zhang Lian unit, the fixing base with first rear fork is connected, the fixing base orientation flywheel group is provided with the guide pillar with extending, zhang Lian unit along the axial of guide pillar with the guide pillar slidable is connected, zhang Lian unit is located the fixing base is close to one side of hub shell, just Zhang Lian unit with the chain is connected, zhang Lian unit is used for being connected with the speed change line, the speed change line can pull Zhang Lian unit is followed the guide pillar slides.
8. The bicycle of claim 7, wherein:
the chain tensioning unit includes:
the sliding seat is connected with the guide post in a sliding manner along the axial direction of the guide post, and a mounting frame is arranged on one side, facing the flywheel set, of the sliding seat;
a crank, a first end of which is hinged with the sliding seat;
the first guide wheel is rotatably connected with the mounting frame around the axis of the first guide wheel, and the first guide wheel is meshed with the chain;
the second guide wheel is rotatably connected with the second end of the crank around the axis of the second guide wheel, the second guide wheel is meshed with the chain, and the axis of the first guide wheel and the axis of the second guide wheel are parallel to the axis of the hub shaft;
the first elastic piece is connected between the fixed seat and the sliding seat;
the second elastic piece is connected between the sliding seat and the crank.
9. The bicycle of claim 8, wherein:
the fixed seat is provided with a first wire groove and a pulley, the peripheral wall of the pulley is provided with a groove, and the axis of the pulley is mutually perpendicular to the guide post;
the sliding seat is provided with a second wire groove and a fastener, the second wire groove is arranged along the axial extension of the guide post, the pulley is positioned between the outlet side of the first wire groove and the inlet side of the second wire groove, the fastener is installed on the sliding seat, and the fastener penetrates through the second wire groove.
10. The bicycle of claim 9, wherein:
the bicycle derailleur structure further includes:
a shifter mounted on a handlebar of the frame;
the gear shifting device comprises a gear shifting device, a gear shifting wire, a fastener and a gear shifting wire, wherein the gear shifting wire is connected with the gear shifting device at a first end, sequentially penetrates through the first wire groove, the groove and the second wire groove, and is connected with the fastener at a second end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144397.XA CN108284914B (en) | 2018-02-12 | 2018-02-12 | Bicycle chain pulling structure and bicycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810144397.XA CN108284914B (en) | 2018-02-12 | 2018-02-12 | Bicycle chain pulling structure and bicycle |
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| CN108284914A CN108284914A (en) | 2018-07-17 |
| CN108284914B true CN108284914B (en) | 2023-10-27 |
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| CN201810144397.XA Active CN108284914B (en) | 2018-02-12 | 2018-02-12 | Bicycle chain pulling structure and bicycle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109436179A (en) * | 2018-12-05 | 2019-03-08 | 珠海迪瑞乐科技有限公司 | Bicycle dials chain structure and bicycle |
| CN111717329A (en) * | 2019-03-22 | 2020-09-29 | 佶庆电机有限公司 | Tension adjusting device of bicycle rear speed changer |
| DK3915864T3 (en) * | 2020-05-29 | 2022-07-11 | Marcin Golec | IMPROVED CHAIN GUIDE FOR A BICYCLE'S REAR DERAILLEUR |
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| CN108284914A (en) | 2018-07-17 |
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