CN2341885Y - Stepless speed changer for bicycle - Google Patents
Stepless speed changer for bicycle Download PDFInfo
- Publication number
- CN2341885Y CN2341885Y CN 98215379 CN98215379U CN2341885Y CN 2341885 Y CN2341885 Y CN 2341885Y CN 98215379 CN98215379 CN 98215379 CN 98215379 U CN98215379 U CN 98215379U CN 2341885 Y CN2341885 Y CN 2341885Y
- Authority
- CN
- China
- Prior art keywords
- water chestnut
- speed governing
- drive wheel
- utility
- model
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a stepless speed changer for a bicycle, which rotates correspondingly to a rear axle. One end of the utility model is fixed with a flywheel; the other end of the utility model is fixed with a pressurer roller; the middle part of the utility model is provided with an input shaft sleeve of a driving wheel; a casing is fixed with an output ring; a set of diamond cones are arranged on a support frame of a diamond cone; the outer side of the support frame of the diamond cone is provided with an outer ring; V-shaped groove-type pressure devices with steel balls are respectively arranged between the pressure roller and the driving wheel, and between the outer ring and the output ring, and thus the driving wheel, the diamond cone and the outer ring produce friction to form input and output motion. A steel ball is arranged between a spiral groove of the support frame of the diamond cone and a radial hole of a speed regulating sleeve; when a speed regulating line is pulled, the speed regulating sleeve rotates, causing the support frame of the diamond cone to move axially, and the working diameter of cones at both sides of the diamond cone are changed, consequently realizing stepless speed regulation.
Description
The utility model relates to a kind of derailleur, relates in particular to a kind ofly can realize infinite variable speed bicycle speed-varying unit.
Existing derailleur kind is more, but all there is certain shortcoming in varying degrees, form by the different driving and driven sprocket wheel stack of several numbers of teeth as a kind of in the external speed shifting mechanism, its speed-change process is to change transmitting ratio by the chain and the sprocket engagement of the different numbers of teeth to realize speed change, chain and sprocket wheel take off chain in the engagement process again easily during speed change, and chain and sprocket wheel produce side direction distortion and sprocket wheel mutual friction is serious and influence its service life mutually.This transmission system must be used chain tension adjusting device.The another kind of form of outer change-speed box is combined to form sprocket wheel by several gear pieces, it realizes changing transmitting ratio by the motion segment radius of circle that changes each gear piece and chain engages position, though it has got rid of the side direction distortion of chain, but still need be used chain tension adjusting device and make the exterior structure complexity.Another kind is the internal speed-changing device, and it constitutes speed change by the gear transmission principle, and it has surface structure simply and not to use the advantage of chain tension adjusting device, but the speed change gear is limited, and makes that speed increases suddenly between each grade, and causes the shortcoming of traveling comfort difference.Above-mentioned speed change all is a step change transmission.
The purpose of this utility model provides a kind of bicycle toric transmission, and it not only has bigger variable-speed ratio scope, and has realized stepless change.
The purpose of this utility model be achieved in that it have with rear axle in relative rotation and the fixing input axle sleeve of outer end and flywheel, the other end of input axle sleeve is provided with and imports the press roll that axle sleeve is fixedly connected and rotate with speed, and there is a drive wheel centre of input axle sleeve.Be located at one group of (more than three) water chestnut awl on the water chestnut awl support, a side of its cone contacts with the cylindrical of drive wheel; Opposite side and outer loop contacts.Between press roll and the drive wheel, be equipped with steel ball V-shaped groove formula follow-up pressure device between outer shroud and the output circle, thereby produce enough pressure.Its shell (floral disc) is directly captiveed joint with the output circle, inner cylinder face at water chestnut awl support has R shape plug helix, the speed governing cover has radial hole, steel ball is installed between radial hole and the R shape plug helix, the speed governing cover has been limited axial motion by axle bowl and cover plate, when handling the speed governing line, water chestnut awl support can move under the effect of speed governing cover and steel ball vertically.
Advantage of the present utility model is: surface structure is simple, and ratio coverage is bigger, easily maintenance, and in riding particularly in the speed-change process traveling comfort good, realized infinite speed variation.
Below in conjunction with drawings and Examples the utility model is further described, wherein:
Fig. 1 is the axial cutaway view of bicycle toric transmission embodiment of the present utility model;
Fig. 2 is the R shape plug helix scheme drawing on the water chestnut awl support inner cylinder face;
Fig. 3 is the section-drawing of R shape plug helix A-A among Fig. 2.
By Fig. 1 bicycle toric transmission of the present utility model, the rear axle 2 that one group of standard is arranged, nut 5, axle bowl 3, axle bumper 4 and steel ball 22, the input axle sleeve 15 that rotates around it is arranged in the outside of rear axle 2, one end and the flywheel of input axle sleeve 15 spin fixing, flywheel is the long and two-short dash line part among Fig. 1, the other end of input axle sleeve 15 is equipped with and imports axle sleeve 15 press roll 8 of rotation synchronously, the drive wheel 10 of axle sleeve 15 slide relative is equipped with and is imported in the centre of input axle sleeve 15, at press roll 8, the end face of drive wheel 10 is provided with V-shaped groove and the steel ball 9 of respective amount is housed, and forms input side steel ball follow-up pressure device.The inboard of on the external diameter of drive wheel 10, being close to three above water chestnut awls 16, water chestnut is bored 16 1 ends and is installed on the water chestnut awl support 12, the other end is installed in and imports on the small rack 20 of axle sleeve 15 slide relative, and the axis of water chestnut awl 16 and the axis angle at 45 of rear axle 2, the outside of water chestnut awl 16 has an outer shroud 17 to be close to, with input side in like manner, between outer shroud 17 and output circle 18, be provided with outgoing side steel ball follow-up pressure device.Output circle 18 is loaded on the internal diameter of shell (floral disc) 1 and captive joint with it, and shell 1 is provided with two sliding fulcrums with respect to rear axle 2 axis, i.e. axle bowl 13, steel ball 22 and axle bowl 21 places.
Inner cylinder face at water chestnut awl support 12 is equipped with R shape plug helix (seeing Fig. 2 and Fig. 3).Speed governing cover 6 is sleeved on the inner cylinder face of water chestnut awl support 12, and has limited its longitudinal travel by cover plate 11, axle bowl 3, is provided with a steel ball knock hole in the right-hand member radial direction of speed governing cover 6; There is the speed governing line 14 that is fixed the left side, and speed governing cover 6 can be bored support 12 inner cylinder faces along water chestnut by 14 controls of speed governing line and be rotated.
Transmission process of the present utility model is achieved in that when flywheel external force drives 15 rotations of input axle sleeve, the press roll 8 that is contained on the input axle sleeve 15 rotates thereupon synchronously, by input side steel ball follow-up pressure device, drive drive wheel 10 rotations, side contacts in drive wheel external diameter and the water chestnut awl 16, under the effect of friction force, drive 16 rotations of water chestnut awl.In like manner, be pressed in the outer shroud 17 that water chestnut bores 16 outsides and also rotate thereupon,, drive output circle 18 and rotate, rotate with output circle 18 shells of captiveing joint 1 thereupon by outgoing side steel ball follow-up pressure device.
Speed-change process of the present utility model is to realize like this; In riding during speed governing, pulling speed governing line 14 rotates speed governing cover 6, because the speed governing cover can not produce longitudinal travel, force to be contained in the steel ball that speed governing overlaps in 6 radial holes and to slide, drive water chestnut awl support 12 and do axially (level) displacements along the R shape plug helix in the water chestnut awl support 12.Water chestnut awl 16 also automatically relatively rotates along self axial line then when making parallel motion with water chestnut awl support 12, the working diameter of water chestnut awl both sides cone is changed, thereby realize infinite speed variation, and boring support 12 when water chestnut is reduction of speed when moving to right vertically; It when moving to left raising speed.
Claims (3)
1 one kinds of bicycle toric transmissions, the rear axle that comprises one group of standard, nut, the axle bowl, axle bumper and steel ball, it is characterized in that it be equipped with rear axle in relative rotation and the fixing input axle sleeve of outer end and flywheel, the other end of input axle sleeve is captiveed joint with press roll, there is a drive wheel centre of input axle sleeve, being located at one group of three above water chestnut on the water chestnut awl support bores a side of its cone and contacts with the cylindrical of drive wheel, opposite side and outer loop contacts, be contained in rotating speed governing cover in the water chestnut awl support by the manipulation of speed governing line, water chestnut awl support and water chestnut awl produce longitudinal travel, at described press roll and drive wheel, between outer shroud and the output circle pressure device is arranged respectively, form drive wheel, the water chestnut awl, the outer shroud fricting movement.
2 by the described bicycle toric transmission of claim 1, it is characterized in that being provided with R shape plug helix at the inner cylinder face of water chestnut awl support, the speed governing cover is sleeved on the inner cylinder face of water chestnut awl support, right-hand member radial direction at the speed governing cover is provided with the steel ball knock hole, there is the speed governing line that is fixed left side at the speed governing cover, the speed governing cover can be bored the support inner cylinder face along water chestnut by the speed governing line control and be rotated, and the speed governing cover is by cover plate, the displacement of axle bowl restrictive axial.
3 by the described bicycle toric transmission of claim 1, it is characterized in that respectively being provided with between press roll and drive wheel, outer shroud and output circle input side and outgoing side steel ball V-shaped groove follow-up pressure device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98215379 CN2341885Y (en) | 1998-06-12 | 1998-06-12 | Stepless speed changer for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98215379 CN2341885Y (en) | 1998-06-12 | 1998-06-12 | Stepless speed changer for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2341885Y true CN2341885Y (en) | 1999-10-06 |
Family
ID=33968712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98215379 Expired - Fee Related CN2341885Y (en) | 1998-06-12 | 1998-06-12 | Stepless speed changer for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2341885Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204218A (en) * | 2012-01-12 | 2013-07-17 | 株式会社岛野 | Continuously Variable Bicycle Transmission |
| CN103879508A (en) * | 2012-12-21 | 2014-06-25 | 株式会社岛野 | Continuously variable bicycle transmission mechanism and bicycle hub |
-
1998
- 1998-06-12 CN CN 98215379 patent/CN2341885Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204218A (en) * | 2012-01-12 | 2013-07-17 | 株式会社岛野 | Continuously Variable Bicycle Transmission |
| US9090312B2 (en) | 2012-01-12 | 2015-07-28 | Shimano Inc. | Continuously variable bicycle transmission |
| CN103204218B (en) * | 2012-01-12 | 2016-07-06 | 株式会社岛野 | Continuous variable bicycle speed-varying unit |
| CN103879508A (en) * | 2012-12-21 | 2014-06-25 | 株式会社岛野 | Continuously variable bicycle transmission mechanism and bicycle hub |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |