CN112298446B - Bicycle speed variator - Google Patents
Bicycle speed variator Download PDFInfo
- Publication number
- CN112298446B CN112298446B CN201910750476.XA CN201910750476A CN112298446B CN 112298446 B CN112298446 B CN 112298446B CN 201910750476 A CN201910750476 A CN 201910750476A CN 112298446 B CN112298446 B CN 112298446B
- Authority
- CN
- China
- Prior art keywords
- gear
- transmission
- clutch
- bicycle
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 230000008859 change Effects 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 3
- 230000009191 jumping Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
Abstract
The invention discloses a bicycle speed changing device, which comprises a shell, a mandrel, a connecting piece, a transmission assembly, a speed changing assembly and a clutch assembly. The mandrel is pivoted to the shell along an axial direction. The assembly member is provided with a driving gear. The transmission assembly is pivoted on the shell and meshed with the driving gear. The speed change assembly comprises a first speed change gear and a second speed change gear, and the first speed change gear and the second speed change gear are respectively in rotary connection with the transmission assembly. The clutch assembly includes a clutch member. The bicycle speed changing device provided by the invention can greatly improve the speed changing section of the bicycle, and can not cause the gear jumping of the speed changer to be smooth due to the over-thick fluted disc, thereby being more convenient to use.
Description
Technical Field
The present invention relates to a bicycle transmission.
Background
In order to meet the requirements of different slopes and speeds of the riding road, the conventional bicycle is provided with toothed discs at the front and rear ends of the chain and the chain is shifted by using the transmission, for example, the front toothed disc has a 3-stage shifting function, the rear toothed disc has a 6-stage shifting function, and thus 18 stages can be achieved. However, when the bicycle is required to have more speed changing functions, the number of the gear stages is increased, so that the thickness of the gear is increased, which causes inconvenience during riding, and the excessive number of the gear stages makes the transmission unable to precisely change to each stage, which has a drawback to be improved.
Therefore, there is a need for a new and improved bicycle shifting device that solves the above problems.
Disclosure of Invention
The present invention is directed to a bicycle speed changing device, which can greatly increase the speed changing section of a bicycle, and prevent the gear plate from being too thick to cause the gear jumping of a transmission smoothly, thereby facilitating the use of the bicycle speed changing device.
To achieve the above objects, the present invention provides a bicycle transmission device, which includes a housing, a spindle, a coupling member, a transmission assembly, a shifting assembly and a clutch assembly. The shell is provided for a bicycle. The spindle is pivoted to the shell along an axial direction, and two ends of the spindle along the axial direction are respectively used for being assembled with a crank of the bicycle. The assembly member is used for assembling a fluted disc of the bicycle, and the assembly member is additionally provided with a driving gear which is linked with the assembly member. The transmission assembly is pivoted on the shell and meshed with the driving gear. The speed changing assembly comprises a first speed changing gear and a second speed changing gear which can rotate relative to the shell, and the first speed changing gear and the second speed changing gear are respectively connected with the transmission assembly in a rotating mode. The clutch component comprises a clutch piece which is connected with the mandrel in a linkage way and can move between a first position and a second position along the axial direction. When the clutch piece is positioned at the first position, the clutch piece is rotationally connected with the first speed change gear, and the mandrel can drive the first speed change gear, the transmission assembly and the driving gear to rotate; when the clutch member is at the second position, the clutch member is rotationally connected with the second speed change gear, and the mandrel can drive the second speed change gear, the transmission assembly and the driving gear to rotate.
The invention has the advantages that:
the bicycle speed changing device provided by the invention can greatly improve the speed changing section of the bicycle, and can not cause the gear jumping of the speed changer to be smooth due to the over-thick fluted disc, thereby being more convenient to use.
Drawings
FIG. 1 is an assembly view of a preferred embodiment of the present invention.
Fig. 2 is a perspective view of a preferred embodiment of the present invention.
FIG. 3 is an exploded view of a preferred embodiment of the present invention.
FIG. 4 is a side cross-sectional view of a preferred embodiment of the invention.
Fig. 5 to 7 are schematic views illustrating the operation of a preferred 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 7, a bicycle shifting device according to a preferred embodiment of the present invention includes a housing 1, a spindle 2, a coupling member 3, a transmission assembly 4, a shifting assembly 5 and a clutch assembly 6.
The housing 1 is provided for a bicycle 9, and in this embodiment the housing 1 is connected to the seat tube, down tube and rear down tube of the bicycle 9, i.e. the position of the bottom bracket of the conventional bicycle 9.
The spindle 2 is pivotally disposed on the housing 1 along an axial direction, and two ends of the spindle 2 along the axial direction are respectively assembled with a crank 91 of the bicycle 9, so that the spindle 2 can be driven to rotate when pedals of the two cranks 91 are stepped on.
The connecting member 3 is provided for connecting with a gear plate 92 of the bicycle 9, and the connecting member 3 is further provided with a driving gear 31. In the present embodiment, the outer peripheral wall of the assembling member 3 is provided with an external threaded portion 32 and a key groove 33 extending along the axial direction, the key groove 33 is provided with a key body, and the fluted disc 92 is screwed on the external threaded portion 32 and clamped against the key body, so as to fix the fluted disc 92 to the assembling member 3.
The transmission assembly 4 is pivoted to the housing 1 and engaged with the driving gear 31.
The speed changing assembly 5 includes a first speed changing gear 51 and a second speed changing gear 52 which can rotate relative to the housing 1, the first speed changing gear 51 and the second speed changing gear 52 are respectively connected with the transmission assembly 4 in a rotating manner, in this embodiment, the radial sizes of the first speed changing gear 51 and the second speed changing gear 52 are different, and the radial size of the first speed changing gear 51 is smaller than that of the second speed changing gear 52, so that the first speed changing gear 51 has the effect of saving labor and time, and the second speed changing gear 52 has the effect of saving labor and time.
The clutch assembly 6 includes a clutch member 61, and the clutch member 61 is coupled to the spindle 2 and can move between a first position and a second position along the axial direction.
When the clutch member 61 is located at the first position, the clutch member 61 is rotationally connected to the first speed change gear 51, and the spindle 2 can drive the first speed change gear 51, the transmission assembly 4 and the driving gear 31 to rotate, so that a rider can step on the pedals of the two cranks 91 with labor and time saving effects to start or climb a slope; when the clutch member 61 is located at the second position, the clutch member 61 is rotationally connected to the second speed changing gear 52, and the spindle 2 can drive the second speed changing gear 52, the transmission assembly 4 and the driving gear 31 to rotate, so that the rider can step on the pedals of the cranks 91 with labor and time saving effects to perform high-speed riding. Therefore, assuming that the bicycle 9 originally has 18-stage speed change effect, the present invention can make the bicycle 9 have 36-stage speed change effect to provide better speed change selection for the rider and avoid the excessive thickness of the toothed disc 92, so the present invention can greatly increase the speed change stage of the bicycle 9, and can not make the toothed disc 92 too thick to cause the transmission to skip the teeth smoothly, thereby being more convenient in use.
Specifically, the clutch member 61 is disposed on the spindle 2 in a non-rotatable manner and can move between the first position and the second position along the axial direction relative to the spindle 2, and the first speed changing gear 51 and the second speed changing gear 52 are disposed on the spindle 2 in a rotatable manner and are respectively disposed at two axial sides of the clutch member 61.
Preferably, two opposite sides of the clutch member 61 along the axial direction are respectively provided with a first engaging portion 611, one side of the first speed-changing gear 51 and one side of the second speed-changing gear 52 facing the clutch member 61 are respectively provided with a second engaging portion 53 engaged with the first engaging portion 611, and the first engaging portion 611 and the second engaging portion 53 are engaged to make the clutch member 61 and the first speed-changing gear 51 or the second speed-changing gear 52 rotate together. In the present embodiment, one of the first engaging portion 611 and the second engaging portion 53 is a plurality of protrusions 612 extending along the axial direction, the other is a plurality of recesses 531 recessed along the radial direction, the protrusions 612 can be selectively inserted into the recesses 531, in the present embodiment, the first engaging portion 611 is a plurality of protrusions 612, the second engaging portion 53 is a plurality of recesses 531, each recess 531 is provided with an inclined guiding surface 532 along the axial direction, so that when the clutch member 61 rotates, the protrusions 612 can be inserted into the recesses 531 smoothly.
Furthermore, the clutch assembly 6 further includes a screw rod 62 and an actuating member 63, the screw rod 62 is pivotally disposed on the housing 1 along the axial direction, one end of the actuating member 63 is screwed to the screw rod 62, and the other end thereof is engaged with the clutch member 61 to drive the clutch member 61 to move along the axial direction. In this embodiment, a coil spring 64 is sleeved on one end of the screw 62, one end of the coil spring 64 is connected to a cable 93, the coil spring 64 normally rotates the screw 62 in a direction to make the actuating member 63 normally move the clutch member 61 in the direction of the first position, wherein one end of the cable 93 is connected to a lever of the lower tube of the bicycle 9, and by pulling the lever, the cable 93 can be driven to move to pull the coil spring 64.
Preferably, the clutch member 61 is radially provided with two annular flanges 613, one end of the actuating member 63 away from the screw rod 62 is provided with a C-shaped sleeve member 631, and the sleeve member 631 is sleeved on the outer peripheral wall of the clutch member 61 and is clamped between the two annular flanges 613, so as to drive the clutch member 61 to move along the axial direction without interfering with the rotation of the clutch member 61.
It should be noted that the transmission assembly 4 includes a transmission shaft 41, a first transmission gear 42 and a second transmission gear 43, the transmission shaft 41 is pivotally disposed on the housing 1, the first transmission gear 42 and the second transmission gear 43 are non-rotatably sleeved on the transmission shaft 41, the first transmission gear 42 is engaged with the first speed changing gear 51, and the second transmission gear 43 is engaged with the second speed changing gear 52. In the embodiment, the transmission assembly 4 further includes a third transmission gear 44, the third transmission gear 44 is non-rotatably sleeved on the transmission shaft 41 and located outside the housing 1, the assembly member 3 is rotatably sleeved on the spindle 2 and located outside the housing 1, the third transmission gear 44 is engaged with the driving gear 31, so that the clutch member 61 drives the first speed changing gear 51 or the second speed changing gear 52 to rotate and the transmission shaft 41 can be driven to rotate, so that the third transmission gear 44 of the transmission shaft 41 drives the driving gear 31 to rotate, and the assembly member 3 can drive the fluted disc 92 to rotate.
In summary, the bicycle speed changing device of the invention can greatly improve the speed changing section of the bicycle, and can not cause the gear plate to be too thick to cause the speed changer to jump the gear smoothly, thereby being more convenient in use.
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 (6)
1. A bicycle shifter, comprising:
a housing for mounting on a bicycle;
the mandrel is pivoted on the shell along an axial direction, and two ends of the mandrel along the axial direction are respectively used for being assembled with a crank of the bicycle;
a connecting piece for assembling a fluted disc of the bicycle, wherein the connecting piece is additionally provided with a driving gear which is linked with the connecting piece;
a transmission component which is pivoted on the shell and meshed with the driving gear;
the speed changing assembly comprises a first speed changing gear and a second speed changing gear which can rotate relative to the shell, and the first speed changing gear and the second speed changing gear are respectively in rotating connection with the transmission assembly;
a clutch component, including a clutch piece, said clutch piece is connected with said mandrel, and can be moved between a first position and a second position along said axial direction;
when the clutch piece is positioned at the first position, the clutch piece is rotationally connected with the first speed change gear, and the mandrel can drive the first speed change gear, the transmission assembly and the driving gear to rotate; when the clutch piece is positioned at the second position, the clutch piece is rotationally connected with the second speed change gear, and the mandrel can drive the second speed change gear, the transmission assembly and the driving gear to rotate;
the clutch assembly further comprises a screw rod and an actuating piece, the screw rod is pivoted to the shell along the axial direction, one end of the actuating piece is in threaded connection with the screw rod, and the other end of the actuating piece is clamped against the clutch piece to drive the clutch piece to move along the axial direction; one end of the screw rod is sleeved with a rolling spring, one end of the rolling spring is connected with a cable, and the rolling spring normally rotates the screw rod towards one direction so that the actuating piece normally moves the clutch piece towards the direction of the first position;
the transmission assembly comprises a transmission shaft, a first transmission gear and a second transmission gear, the transmission shaft is pivoted on the shell, the first transmission gear and the second transmission gear are sleeved on the transmission shaft in a non-rotatable manner, the first transmission gear is meshed with the first speed change gear, and the second transmission gear is meshed with the second speed change gear; the transmission assembly further comprises a third transmission gear, the third transmission gear is non-rotatably sleeved on the transmission shaft and located outside the shell, the assembly piece is rotatably sleeved on the mandrel and located outside the shell, and the third transmission gear is meshed with the driving gear.
2. The bicycle shifting apparatus according to claim 1, wherein the clutch member is rotatably sleeved on the spindle and is movable between the first position and the second position along the axial direction relative to the spindle, and the first speed changing gear and the second speed changing gear are rotatably sleeved on the spindle and are respectively located at two axial sides of the clutch member.
3. The bicycle shifter of claim 1, wherein the clutch member has first engaging portions at opposite sides thereof in the axial direction, and the first and second shift gears have second engaging portions at sides thereof facing the clutch member to engage with the first engaging portions.
4. The bicycle shifter of claim 3, wherein each of the first engaging portions and the second engaging portions includes a plurality of protrusions extending in the axial direction and a plurality of radially recessed holes, the protrusions being selectively inserted into the recessed holes, and each of the recessed holes includes an inclined guide surface in the axial direction.
5. The bicycle transmission as claimed in claim 1, wherein the clutch member has two annular flanges radially, and the actuator member has a C-shaped engaging member at an end thereof remote from the threaded rod, the engaging member being engaged with the outer peripheral wall of the clutch member and being engaged between the two annular flanges.
6. The bicycle shifter of any one of claims 1 to 5, wherein the outer peripheral wall of the coupling member is provided with an externally threaded portion and an axially extending keyway for providing a key body against which the toothed plate is threadedly engaged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108127308A TWI721517B (en) | 2019-08-01 | 2019-08-01 | Transmission device for bicycle |
| TW108127308 | 2019-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112298446A CN112298446A (en) | 2021-02-02 |
| CN112298446B true CN112298446B (en) | 2022-03-01 |
Family
ID=74486675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910750476.XA Active CN112298446B (en) | 2019-08-01 | 2019-08-14 | Bicycle speed variator |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112298446B (en) |
| TW (1) | TWI721517B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064058A (en) * | 1991-09-07 | 1992-09-02 | 高杨程 | Automatic speed-changing device for bicycle |
| CN2830254Y (en) * | 2005-08-26 | 2006-10-25 | 毕忠成 | Engine gearbox of speed variable boosting motorcycle |
| CN101204986A (en) * | 2006-12-18 | 2008-06-25 | 潘健 | Bicycle speed changer |
| CN101559816A (en) * | 2008-04-17 | 2009-10-21 | 农豪实业股份有限公司 | Bicycle with clutch transmission function system |
| CN102420494A (en) * | 2011-12-27 | 2012-04-18 | 江苏元始高科技有限公司 | Variable speed wheel-disc integrated mid-motor in electrical bicycle |
| TW201348060A (en) * | 2012-05-18 | 2013-12-01 | Sun Race Sturmey Archer Inc | Drive transmission capable of multi-speed gear-shifting by reverse rotation |
| CN203410592U (en) * | 2013-03-26 | 2014-01-29 | 刘孟武 | Front fluted discspeed changer of bicycle |
| CN206092735U (en) * | 2016-09-18 | 2017-04-12 | 王则根 | Manual two -way clutch of agricultural pump |
| CN206446751U (en) * | 2017-01-18 | 2017-08-29 | 文定新 | A kind of folk art term switching device being installed on bicycle |
| CN107529497A (en) * | 2017-09-22 | 2018-01-02 | 梁子辰 | A kind of bar driving bicycle with clutch speed-changing structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101701289B1 (en) * | 2016-02-05 | 2017-02-01 | 장사석 | A transmission for bicycle crank |
| JP6705740B2 (en) * | 2016-12-21 | 2020-06-03 | 株式会社シマノ | Bicycle transmission and bicycle internal gear hub |
-
2019
- 2019-08-01 TW TW108127308A patent/TWI721517B/en active
- 2019-08-14 CN CN201910750476.XA patent/CN112298446B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064058A (en) * | 1991-09-07 | 1992-09-02 | 高杨程 | Automatic speed-changing device for bicycle |
| CN2830254Y (en) * | 2005-08-26 | 2006-10-25 | 毕忠成 | Engine gearbox of speed variable boosting motorcycle |
| CN101204986A (en) * | 2006-12-18 | 2008-06-25 | 潘健 | Bicycle speed changer |
| CN101559816A (en) * | 2008-04-17 | 2009-10-21 | 农豪实业股份有限公司 | Bicycle with clutch transmission function system |
| CN102420494A (en) * | 2011-12-27 | 2012-04-18 | 江苏元始高科技有限公司 | Variable speed wheel-disc integrated mid-motor in electrical bicycle |
| TW201348060A (en) * | 2012-05-18 | 2013-12-01 | Sun Race Sturmey Archer Inc | Drive transmission capable of multi-speed gear-shifting by reverse rotation |
| CN203410592U (en) * | 2013-03-26 | 2014-01-29 | 刘孟武 | Front fluted discspeed changer of bicycle |
| CN206092735U (en) * | 2016-09-18 | 2017-04-12 | 王则根 | Manual two -way clutch of agricultural pump |
| CN206446751U (en) * | 2017-01-18 | 2017-08-29 | 文定新 | A kind of folk art term switching device being installed on bicycle |
| CN107529497A (en) * | 2017-09-22 | 2018-01-02 | 梁子辰 | A kind of bar driving bicycle with clutch speed-changing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI721517B (en) | 2021-03-11 |
| TW202106561A (en) | 2021-02-16 |
| CN112298446A (en) | 2021-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108995759B (en) | Bicycle rear derailleur and damper device for a bicycle rear derailleur | |
| CN111703536B (en) | Damper for bicycle component | |
| US5924950A (en) | Even increment, non-overlapping bicycle transmission | |
| US20070245846A1 (en) | System for manipulating a continuously variable transmission | |
| US6852060B1 (en) | Gear assembly | |
| JP2914909B2 (en) | Gearbox for bicycle transmission | |
| JPH05507891A (en) | automatic switching gearbox | |
| US10807677B2 (en) | Directional transmission mechanism, directional sprocket apparatus and pedal device | |
| EP2075186A2 (en) | Bicycle internal hub transmission with helical gear | |
| CN112298446B (en) | Bicycle speed variator | |
| US6293882B1 (en) | Operating force compensating apparatus for a bicycle transmission | |
| US20040066017A1 (en) | Bicycle drive train | |
| US5301571A (en) | Automatic speed gear for bicycles | |
| CN113619723B (en) | Speed change operation device | |
| KR20080008439A (en) | A non-stage transmission bicycle for chainless | |
| CN112849331B (en) | Bicycle speed variator | |
| WO2021026811A1 (en) | Derailleur gear apparatus | |
| KR102034744B1 (en) | bicycle driving apparatus | |
| KR101653144B1 (en) | Automatic transmission for bicycle and bicycle having the same | |
| EP0468107B1 (en) | Transmission | |
| US6796200B2 (en) | Multi speed bicycle transmission including eccentric cranking assembly | |
| CN218258573U (en) | Front speed variator of bicycle | |
| TWI823558B (en) | Front gearshift device for bicycle | |
| KR20030069422A (en) | A velocity change assembly of bicycle | |
| US11305839B2 (en) | Transmission device for bicycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |