CN201808650U - Three-stage variable-speed power transmission device for chain-free bicycle - Google Patents
Three-stage variable-speed power transmission device for chain-free bicycle Download PDFInfo
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- CN201808650U CN201808650U CN2010202831261U CN201020283126U CN201808650U CN 201808650 U CN201808650 U CN 201808650U CN 2010202831261 U CN2010202831261 U CN 2010202831261U CN 201020283126 U CN201020283126 U CN 201020283126U CN 201808650 U CN201808650 U CN 201808650U
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Abstract
The utility model discloses a three-stage variable-speed power transmission device for a chain-free bicycle, wherein a first drive gear and a second drive gear are arranged on a main shaft and combined with the main shaft in a splined manner; three driven gears are mounted on a transmission shaft, wherein a first driven gear is fixedly connected with a second driven gear through a first connecting ring, and the second driven gear is fixedly connected with a third driven gear through a second connecting ring; a gear chamber is formed outside the three driven gears, the right side of the first driven gear is positioned on the gear chamber through a right thrust bearing, and the left side of the third driven gear is positioned on the gear chamber through a left thrust bearing; a power take-off gear is mounted on the main shaft through a second bearing; the lower part of the gear chamber is provided with a positioning shaft, which is sleeved with a shift fork; and the shift fork can stir the second drive gear and enable the second drive gear to slide among a high gear, a middle gear and a low gear. The three-stage transmission device is used in the chain-free bicycle and provided the bicycle with three gears.
Description
Technical field
The utility model belongs to the bicycle power transmission, particularly a kind of three-stage speed change power transmission device for chainless bicycles.
Background technology
Bicycle is a walking-replacing tool indispensable during people live, and also is a kind of extraordinary fitness tool.Society advocates green living very much now, reduces emission of carbon-dioxide, and bicycle can more and more be subjected to liking of people as a kind of environmental protection vehicle.
Traditional bicycle all is by chain gear, but the chain gear meeting makes big, the Heavy Weight of bicycle frame structure, very inconvenience in carrying, and the bottom of s trouser leg can appear pressing when using, fall inconvenience such as chain.
Occurred chain-less bicycle in the market, but owing to still use radially unidirectional driving system, made bicycle structure more complicated, cost is expensive more.And chain-less bicycle does not on the market have transmission system, is going up a slope, is waiting under the situation against the wind and can't realize speed change, thereby can't realize laborsaving function, requires great effort very much when riding.
The utility model content
The technical matters that the utility model solved is to provide a kind of three-stage speed change power transmission device for chainless bicycles.
The technical solution that realizes the utility model purpose is: a kind of three-stage speed change power transmission device for chainless bicycles comprises main shaft, gear chamber, first driving gear, right thrust baring, first driven gear, first coupling link, second driven gear, second coupling link, the 3rd driven gear, left thrust baring, unidirectional driver blade, automatic-reset spring, flower-drum, fix shaft, shift fork, second driving gear, power output gear, transmission shaft;
Described first driving gear, second driving gear is arranged on the main shaft, two gears are connected mutually by spacer, mode with spline between two gears and the main shaft combines, first driven gear is installed on the transmission shaft, second driven gear and the 3rd driven gear, be connected by first coupling link between first driven gear and second driven gear, second driven gear is connected by second coupling link mutually with the 3rd driven gear, the outer setting gear chamber of three driven gears, wherein the right side of first driven gear is positioned on the gear chamber by right thrust baring, and the left thrust baring that passes on left of the 3rd driven gear is positioned on the gear chamber;
Power output gear passes through second bearing installation on main shaft, the bottom of gear chamber is provided with fix shaft, be with shift fork on this axle, described shift fork can be stirred second driving gear and slide between high gear, middling speed gear and low gear, when second driving gear is positioned at high gear, first driving gear is meshed with first driven gear, and the 3rd driven gear is meshed with power output gear; When second driving gear was positioned at the meta shelves, second driving gear was meshed with second driven gear, and the 3rd driven gear is meshed with power output gear; When second driving gear was positioned at the low level shelves, the side direction tooth of second driving gear directly was meshed with the side direction tooth of power output gear;
Flower-drum is installed on the main shaft by clutch shaft bearing, its inside has spline, one end of flower-drum is provided with automatic-reset spring, one end of this spring and flower-drum near, the other end and unidirectional driver blade near, unidirectional driver blade is pressed in the side of power output gear, the periphery of unidirectional driver blade is a gear-like, spline in the periphery of unidirectional driver blade and the flower-drum is meshed, rotate synchronously with flower-drum, unidirectional driver blade and power output gear near face clockwise unidirectional tooth is set, this unidirectional tooth and power output gear side; Groove match, unidirectional driver blade is rotated under the drive of power output gear, realize unidirectional transmission.
The utility model compared with prior art, its remarkable advantage: 1) three grades of gear stages of the present utility model are used for chain-less bicycle, make chain-less bicycle have three gears, the power input of three gears was respectively 1: 1,1: 2.25 and 1: 3.5 with the output speed ratio, bicycle can be shifted gears between three gears, realizes speed change; 2) the utility model adopts unidirectional unique transmission power technology, makes the present existing technology of bicycle unidirectional operation control system texture ratio compact and reasonable more, cost is lower take up room littler; 3) power transmission of the present utility model unites two into one bicycle dynamical axis and back-wheel drive axle, has saved chain or transmission shaft transmission engine installation.Make bicycle structure compact more, dynamic friction consumes and reduces; 4) the utility model makes the bicycle dynamical axis unite two into one with the back-wheel drive axle and makes between power input gear and the main shaft and combines in the spline mode, make power input tooth under the effect of fork 17 in spline position sway, realize the exchange of three kinds of speed.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is a bicycle three-step gear shift power transmission schematic diagram of the present utility model.
Fig. 2 is a bicycle three-step gear shift power transmission constructional drawing of the present utility model.
The specific embodiment
In conjunction with Fig. 1, Fig. 2, a kind of three-stage speed change power transmission device for chainless bicycles of the present utility model comprises main shaft 1, gear chamber 2, first driving gear 3, right thrust baring 4, first driven gear 5, first coupling link 19, second driven gear 20, second coupling link 6, the 3rd driven gear 7, left thrust baring 8, unidirectional driver blade 9, automatic-reset spring 10, flower-drum 13, fix shaft 16, shift fork 17, second driving gear 21, power output gear 22, transmission shaft 24;
Described first driving gear 3, second driving gear 21 is arranged on the main shaft 1, two gears are connected mutually by spacer, form the disjunctor gear, mode with spline between two gears and the main shaft combines, first driven gear 5 is installed on the transmission shaft 24, second driven gear 20 and the 3rd driven gear 7, be connected by first coupling link 19 between first driven gear 5 and second driven gear 20, second driven gear 20 is connected by second coupling link 6 mutually with the 3rd driven gear 7, three driven gears are the disjunctor gear, the outer setting gear chamber 2 of three driven gears, wherein the right side of first driven gear 5 is positioned on the gear chamber 2 by right thrust baring 4, and the left thrust baring 8 that passes on left of the 3rd driven gear 7 is positioned on the gear chamber 2;
Flower-drum 13 is installed on the main shaft 1 by clutch shaft bearing 12, its inside has spline, one end of flower-drum 13 is provided with automatic-reset spring 10, one end of this spring and flower-drum near, the other end and unidirectional driver blade 9 near, unidirectional driver blade 9 is pressed in the side of power output gear 22, the periphery of unidirectional driver blade 9 is a gear-like, spline in the periphery of unidirectional driver blade and the flower-drum 13 is meshed, rotate synchronously with flower-drum 13, unidirectional driver blade and power output gear 22 near face clockwise unidirectional tooth is set, this unidirectional tooth and power output gear 19 sides; Groove match, unidirectional driver blade is rotated under the drive of power output gear 19, realize unidirectional transmission, finally drive flower-drum 13 rotation.
Unidirectional tooth is a projection, this crowning is the inclined-plane to unidirectional driver blade 9 right handed sides, the thickness on this inclined-plane reduces gradually along unidirectional dextrorotation veer, until thickness is zero, the quantity of unidirectional tooth is two, be symmetricly set on the side of unidirectional driver blade, this side is towards power output gear.The groove quantity of power output gear side is eight.Because the existence of unidirectional tooth, unidirectional driver blade can receive the unidirectional power that power output gear provides, and realizes the unidirectional transmission of unidirectional driver blade.The structure of this unidirectional tooth is in the patent of applying on the same day: open in " the axial unidirectional power transmitting device of chain-less bicycle ".
The right side of above-mentioned power output gear 22 is provided with the side direction tooth, when driving device was positioned at low gear, this side direction tooth was meshed with the side direction tooth of second driving gear 21, and the left side of power output gear 22 is provided with groove, this groove matches with the unidirectional tooth of unidirectional driver blade 9, realizes unidirectional transmission.
Because the ratio of the number of gears of first driving gear 3 and first driven gear 5 is 35: 15=7: 3, the ratio of the number of gears of second driving gear 21 and second driven gear 20 is 30: 20=3: the ratio of the number of gears between 2, the three driven gears 7 and the power output gear 22 is 30: 20=3: 2.So when shift fork 17 with 21 groups of second driving gears during to high-order shelves, the power input is (3*2) with the ratio of output: (7*3)=1: 3.5, realize 3.5 times speed change; When shift fork 17 with 21 groups of second driving gears during to the meta shelves, the power input is (2*2) with the ratio of output: (3*3)=1: 2.25, realize 2.25 times speed change; When shift fork 17 during to the low level shelves, is realized 1: 1 speed change with 21 groups of second driving gears.
Bottom bracket bearing of bicycle drives driving gear and rotates under the manpower effect, by power output gear 22 power is input on the unidirectional driver blade 9 at last, drives bicycle drive shaft 13 bicycle is travelled forward.
Claims (2)
1. three-stage speed change power transmission device for chainless bicycles, it is characterized in that, comprise main shaft [1], gear chamber [2], first driving gear [3], right thrust baring [4], first driven gear [5], first coupling link [19], second driven gear [20], second coupling link [6], the 3rd driven gear [7], left thrust baring [8], unidirectional driver blade [9], automatic-reset spring [10], flower-drum [13], fix shaft [16], shift fork [17], second driving gear [21], power output gear [22], transmission shaft [24];
Described first driving gear [3], second driving gear [21] is arranged on the main shaft [1], two gears are connected mutually by spacer, mode with spline between two gears and the main shaft combines, first driven gear [5] is installed on the transmission shaft [24], second driven gear [20] and the 3rd driven gear [7], be connected by first coupling link [19] between first driven gear [5] and second driven gear [20], second driven gear [20] is connected by second coupling link [6] mutually with the 3rd driven gear [7], the outer setting gear chamber [2] of three driven gears, wherein the right side of first driven gear [5] is positioned on the gear chamber [2] by right thrust baring [4], and the left thrust baring [8] that passes on left of the 3rd driven gear [7] is positioned on the gear chamber [2];
Power output gear [22] is installed on the main shaft [1] by second bearing [23], the bottom of gear chamber [2] is provided with fix shaft [16], be with shift fork [17] on this axle, described shift fork can be stirred second driving gear [21] and slide between high gear, middling speed gear and low gear, when second driving gear [21] when being positioned at high gear, first driving gear [3] is meshed with first driven gear [5], and the 3rd driven gear [7] is meshed with power output gear [22]; When second driving gear [21] was positioned at the meta shelves, second driving gear [21] was meshed with second driven gear [20], and the 3rd driven gear [7] is meshed with power output gear [22]; When second driving gear [21] was positioned at the low level shelves, the side direction tooth of second driving gear [21] directly was meshed with the side direction tooth of power output gear [22];
Flower-drum [13] is installed on the main shaft [1] by clutch shaft bearing [12], its inside has spline, one end of flower-drum [13] is provided with automatic-reset spring [10], one end of this spring and flower-drum near, the other end and unidirectional driver blade [9] near, unidirectional driver blade [9] is pressed in the side of power output gear [22], the periphery of unidirectional driver blade [9] is a gear-like, spline in the periphery of unidirectional driver blade and the flower-drum [13] is meshed, with flower-drum [13] rotation synchronously, unidirectional driver blade and power output gear [22] near face clockwise unidirectional tooth is set, this unidirectional tooth and power output gear [19] side; Groove match, unidirectional driver blade is rotated under the drive of power output gear [19], realize unidirectional transmission.
2. three-stage speed change power transmission device for chainless bicycles according to claim 1, it is characterized in that, first driving gear [3] is 35 with the ratio of the number of gears of first driven gear [5]: 15=7: 3, second driving gear [21] is 30 with the ratio of the number of gears of second driven gear [20]: 20=3: the ratio of the number of gears between 2, the three driven gears [7] and the power output gear [22] is 30: 20=3: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202831261U CN201808650U (en) | 2010-08-05 | 2010-08-05 | Three-stage variable-speed power transmission device for chain-free bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202831261U CN201808650U (en) | 2010-08-05 | 2010-08-05 | Three-stage variable-speed power transmission device for chain-free bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201808650U true CN201808650U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202831261U Expired - Fee Related CN201808650U (en) | 2010-08-05 | 2010-08-05 | Three-stage variable-speed power transmission device for chain-free bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201808650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913406A (en) * | 2010-08-05 | 2010-12-15 | 周万松 | Three-stage speed change power transmission device for chainless bicycles |
| CN104455241A (en) * | 2014-11-03 | 2015-03-25 | 张启良 | Gear shifting planet gear speed reducer for electric wheelchair |
-
2010
- 2010-08-05 CN CN2010202831261U patent/CN201808650U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913406A (en) * | 2010-08-05 | 2010-12-15 | 周万松 | Three-stage speed change power transmission device for chainless bicycles |
| CN104455241A (en) * | 2014-11-03 | 2015-03-25 | 张启良 | Gear shifting planet gear speed reducer for electric wheelchair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20110805 |