CN1017978B - Automatic gearshift device for bicycle - Google Patents
Automatic gearshift device for bicycleInfo
- Publication number
- CN1017978B CN1017978B CN 89109221 CN89109221A CN1017978B CN 1017978 B CN1017978 B CN 1017978B CN 89109221 CN89109221 CN 89109221 CN 89109221 A CN89109221 A CN 89109221A CN 1017978 B CN1017978 B CN 1017978B
- Authority
- CN
- China
- Prior art keywords
- gear
- slide bar
- claw
- bicycle
- wheel
- 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
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- Structure Of Transmissions (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
To make troublesome speed change lever operation unnecessary by performing speed change action with such a constitution that the locking position of a pressing engagement element is changed according to the change of rotational resistance applied to a tire so that gear mechanisms of different speed change ratios are automatically selected. At the time of normal running, a pressing engagement element 2 fitted at a chain wheel 1 is engagingly locked at the deepest locking part 7a by means of a spring 3, and a clutch ring 4 is coupled to the chain wheel 1 so as to be rotated in the direction of an arrow. In approaching a slope and the like in this state, when the pressing force of the pressing engagement element 2 reaches the set value of the first spring pressure of the spring 3 at the locking part 7a, the pressing engagement element 2 is moved as far as a locking part 7b getting over the locking part 7a. Accompanied by this, a claw-formed piston 6b is protruded inward and becomes engaged with the outer peripheral recessions and protrusions of a ring gear 8b, and thereby a sun gear 11 is driven through gear mechanisms 9b-10b of medium amplification factor, so that a tire is driven at medium speed.
Description
The present invention relates to a kind of automatic shift device that is used for bicycle, particularly a kind of according to the variation of wheel revolutions resistance the automatic bicycle speed variator of automatic switchover converter speed ratio.
The transmission system that is used for bicycle in the prior art all is to use the manual mode switch speed ratio.This transmission system will carry out M/C by bike the time, very inconvenient, and also dangerous.
The purpose of this invention is to provide a kind of later-model transmission system, this transmission system can be according to the size of wheel revolutions resistance, automatically select suitable converter speed ratio, make the bicycle shift that always has only the moving operation of armrest to realize regulate and become automation, not only exempt the trouble of operating by bike on one side on one side, and improved travel safety.
The purpose of the invention described above can be achieved like this.The propulsive effort of bicycle pedal is usually via chain or belt and be passed to sprocket wheel or belt pulley.In the inboard of sprocket wheel or belt pulley, load onto a pressure arm, described pressure arm keeps pressured to the centre of gration direction by means of spring wire and so on elastic element, and rotates with described sprocket wheel or belt pulley.In the inboard of sprocket wheel or belt pulley, be provided with a clutch ring of swivel in the form of a ring; The periphery of clutch ring is formed with a plurality of segmentation grooves, and the distance at every section groove and center has nothing in common with each other, and the intersection of segmentation groove is formed with brake surface, and aforementioned pressure arm props up in a plurality of brake surfaces selectively.The bottom of every section groove offers a through hole that points to the center respectively on the different horizontal positions at corresponding brake surface position, be inserted with a claw-like slide bar in the described through hole, and described slide bar Drawing upon spring and so on device keeps often leaning laterally.When some in above-mentioned a plurality of brake surfaces withstands described pressure arm because pressure arm is fixed on the inboard of sprocket wheel or belt pulley, therefore described clutch ring just and sprocket wheel or belt pulley rotate together.On the different horizontal positions of clutch ring inboard, be installed on and the same number of a plurality of inner geares of aforementioned claw-like slide bar, the periphery of described inner gear forms useful to block the same number of a plurality of inner geares of described claw-like slide bar, the periphery of described inner gear forms useful serration recess with the ratchet that blocks described claw-like slide bar, and Zhou Zewei Ring gear in it.These inner geares are passed to a sun gear to rotation via the different compound planet gear of transmitting ratio respectively, and described sun gear is fixed on an end of bicycle rear wheel hub.
The different rotary resistance of wheel makes pressure arm that different power is passed to its spring wire during driving, the latter satisfies the bending of doing in various degree, cause pressure arm to prop up different brake surfaces, and different claw-like slide bars depressed, the ratchet of slide bar just blocks in the periphery recess of corresponding inner gear, thereby makes different inner gear rotations.Like this, the propulsive effort of bicycle pedal just is passed to sun gear that is rear wheel hub by the compound planet gear of different drive ratios.This automatic shift device can automatically switch to suitable speed change gear according to the suffered different rotary resistance of wheel.
Automatic bicycle speed variator of the present invention, suffered different rotary resistance in the time of on the road surface, rolling according to wheel, automatically selected suitable converter speed ratio, thereby need not be as hand-operated transmission always, operate shifter bar when driving with change speed, make the cyclist from miscellaneous operation, free, and the safety of driving has also obtained guarantee.In addition, this device does not need power such as oil pressure or electric power when action, and device proper can be done very little very gently, be easy to install on the bicycle, and also cheap.
Description of drawings is as follows.Fig. 1 is the side elevation in partial section of first embodiment of the invention; Fig. 2 is the cutaway view of this device along A-A line among Fig. 1; Fig. 3 is the positive view of second embodiment of the invention; Fig. 4 is the cutaway view of the described device of second embodiment along B-B line among Fig. 3; Fig. 5 is the gear parts cutaway view along C-C line among Fig. 3; Fig. 6 is the gear parts cutaway view along D-D line among Fig. 3.Wherein among Fig. 5 and Fig. 6, the gear Outboard Sections does not omit and draws.
Among the figure:
1-sprocket wheel 2-pressure arm
The spring wire that 3-presses down pressure arm
4-clutch ring 5-makes the spring that pushes up on the claw-like slide bar
6-claw-like slide bar 7-brake surface
8-inner gear 9-planetary wheel
10-planetary wheel 11-sun gear
12-anchor shaft 13-wheel hub
14-width of cloth bar 15-transmission system box
The bearing seat of 16-compensating-gear shaft
17-planetary wheel 18-sun gear
Below in conjunction with all accompanying drawings, describe automatic bicycle speed variator of the present invention in detail.
Fig. 1 and Fig. 2 are the first embodiment of the present invention, that is a kind of embodiment of the automatic shift device of three sections speed changes.
Being supported at both ends on the back fork of bicycle of anchor shaft (12) is equipped with the wheel hub (13) of spoke (14), be installed on the anchor shaft (12), and rotatable.
Wheel hub (13) extends in transmission system box (15), is fixed with sun gear (11) at the one end.Transmission system box (15) is fixed on the anchor shaft (12).
Inside in transmission system box (15), in the lateral, sprocket wheel (1), clutch ring (4), inner gear (8a) (8b) (8c), driving gear set (9a-10a) (9b-10b) (9c-10c) are installed in turn, and part such as above-mentioned each gear etc. in addition all can rotate freely.
Installed inside at sprocket wheel (1) has a pressure arm (2), and described pressure arm (2) keeps pressing down to center position under the effect of spring wire (3).
Periphery in clutch ring (4) is formed with several segmentation grooves, and described segmentation groove has brake surface (7a), (7b), (7c), and above-mentioned pressure arm (2) promptly is located in these segmentation grooves.In addition, each the brake surface position on clutch ring (4) is provided with claw-like slide bar (6a), (6b), (6c), and described claw-like slide bar is subjected to the effect of spring (5a), (5b), (5c), keeps leaning laterally.
Described claw-like slide bar, along laterally staggering respectively of clutch ring, that is its allocation position is, and slide bar (6a) is corresponding to inner gear (8a), and slide bar (6b) is corresponding to inner gear (8b), and slide bar (6c) is corresponding to inner gear (8c).When slide bar moves and when outstanding to the inside, its ratchet just and the serration recess interlock of corresponding inner gear periphery.
Inner gear (8a); By gear drive (8a-10a) with sun gear (11) engagement.Equally, inner gear (8b) and (8c) respectively by gear drive (9b-10b) and (9c-10c) and and sun gear (11) mesh.Sun gear (11) and wheel hub (13) are fixed as one, and are installed in together on the anchor shaft (12), and can rotate freely thereon.Spoke (14) is housed on the wheel hub (13), uses fixing vehicle wheel.
Now the operating principle to the automatic bicycle speed variator of said structure is illustrated.When driving a vehicle usually, be installed in the pressure arm (2) on the sprocket wheel (1), under the effect of spring wire (3), keep withstanding the brake surface (7a) that clutch ring (4) is gone up innermost side.So clutch ring (4) just and sprocket wheel (1) rotate by direction shown in the arrow A together.Simultaneously, because pressure arm (2) is pushed down brake surface (7a), claw-like slide bar (6a) just resists the elastic force of spring (5a), and direction is outstanding to the inside, its ratchet just is engaged in the formed serration recess of inner gear (8a) periphery, makes inner gear (8a) also by the rotation of direction shown in the arrow A.
Like this, inner gear (8a) just by the gear drive (9a-10a) of over-speed gear ratio maximum and sun gear (11) mesh, the latter is rotated by direction shown in the arrow B, thereby wheel hub (13) and spoke (14) via being fixed as one with sun gear (11) make wheel make high speed revolution.
When driving up gradient or drive a vehicle when the relatively poor road of condition etc. produces the place of big rotational resistance, the pressure one that pressure arm (2) props up brake surface (7a) reaches first elastic force (this value depends on the elastic force size of spring (3)) that spring wire (3) gives elder generation's setting, pressure arm (2) is just crossed brake surface (7a), moves to brake surface (7b).
Under this state, claw-like slide bar (6a) no longer and the recess of inner gear (8a) periphery engagement, claw-like slide bar (6b) is then outstanding to the inside, the recess engagement of its ratchet and inner gear (8b) periphery makes inner gear (8b) by the rotation of direction shown in the arrow A.
Inner gear (8b) via the gear drive (9b-10b) of medium over-speed gear ratio and sun gear (11) mesh and drive its rotation, thereby wheel is rotated with middling speed.
When if rotational resistance is bigger, then identical with the above-mentioned action of changing into the middling speed occasion, propulsive effort is passed to inner gear (8c), makes sun gear (11) rotation via the gear drive (9c-10c) of minimum over-speed gear ratio, and wheel is promptly with low speed rotation.
No matter under which kind of occasion, have only an inner gear to be driven by clutch ring, other inner gear only dallies.
The handoff procedure of gear mechanism discussed above, the inverse process when just being the bicycle entry into service.That is, suffered rotational resistance maximum when just having started owing to bicycle, pressure arm (2) just moves to the brake surface (7c) of over-speed gear ratio minimum, is located on this brake surface.Along with reducing of rotational resistance, the rotatory inertia of wheel constantly increases, and has surpassed from the pedal effect of chain wheel driving power just, so clutch ring rotates with regard to being subjected to inertia effects, pressure arm (2) just retreats to the brake surface (7b) of next bit.Equally, if on this position, the rotational resistance of driving reduces once more, and pressure arm (2) just moves to the corresponding brake surface of common driving (7a) so.
In addition, when sprocket wheel (1) when stopping the rotation,, also has the effect of flywheel with the inner gear (8) of its periphery recess and the interlock of claw-like slide bar.
Fig. 3,4,5,6 is depicted as second embodiment of the invention, and wherein automatic shift device has adopted different gear mechanisms.Now be described as follows.
The structure of inner gear Outboard Sections and effect, identical with first embodiment.The same with first embodiment, the periphery of inner gear (8) is formed with identical recess.In it diameter in week then by (8a), (8b), (8c) in turn and one of a ratio is little, and corresponding with each inner gear, on anchor shaft (12), be installed on a diameter big sun gear of a ratio (18a), (18b), (18c).
Between large internal gear (8a), (8b), (8c) and sun gear (18a), (18b), (18c), be provided with planetary wheel (17a), (17b), (17c), they mesh with cooresponding inner gear and sun gear respectively, described planetary wheel can around they axle and rotate, described axle then install in and the bearing seat (16) that constitutes of wheel hub (13) one on.
Wheel is installed on the wheel hub (13) that rotates together with planetary bearing seat (16) by spoke (14).
The operating principle of second embodiment is described now.The same with first embodiment, according to the size of wheel revolutions resistance, select some among inner gear (8a), (8b), (8c) for use.
Select inner gear (8a) under high speed situation for use, at this moment, less this group gear of sun gear (18a) of planetary wheel (17a) that inner gear (8a) and diameter are bigger and diameter works.When inner gear (8a) is pressed the driving of arrow C direction, because sun gear (18a) is fixed, therefore planetary wheel (17a) is being pressed shown in the arrow D in the direction rotation, and also by above-mentioned same direction revolution, that is planetary bearing seat (16) is also by the rotation of arrow C direction.Because wheel hub (13) and compensating-gear shaft bearing (16) are fixed as one, so wheel hub (13) is also by the rotation of arrow C direction, and wheel is with regard to high speed revolution.
When selecting inner gear (8b) for use, the sun gear (18b) of planetary wheel of intermediate diameters (17b) and intermediate diameters works, and manner of execution is identical with the occasion of selecting inner gear (8a) for use, and wheel rotates with regard to middling speed.
Equally, when selecting inner gear (8c) for use, the sun gear (18c) that planetary wheel (17c) that diameter is less and diameter are bigger works, and wheel is with regard to low speed rotation, and this moment, the bicycle ratio was easier to drive.
The not action of the gear cluster of transmission of drive force, and the flywheel effect that produces according to the various combination of inner gear and claw-like slide bar, all the same with first embodiment.
Claims (2)
1, a kind of automatic bicycle speed variator, comprise and be installed on the bicycle rear anchor shaft and the wheel hub that can rotate thereon, and clutch ring, on the different horizontal positions of described clutch ring inboard, be installed on a plurality of inner geares, described inner gear is passed to a sun gear to rotation via the different compound planet gear of transmitting ratio respectively, it is characterized in that
--the periphery of-aforementioned clutch, be formed with a plurality of segmentation grooves, the distance at every section groove and center has nothing in common with each other, the intersection of segmentation groove is formed with brake surface, with the sprocket wheel inboard of bicycle pedal interlock, be provided with a pressure arm, described pressure arm mat one elastic element and maintain one that optionally props up in described a plurality of brake surface, the bottom of every section groove, on the different horizontal phase position at corresponding brake surface position, offer a through hole that points to the center respectively, be inserted with a claw-like slide bar in the described through hole, described slide bar Drawing upon elastic element keeps often leaning laterally, on the different horizontal positions of described clutch ring inboard, be installed on and the same number of a plurality of inner geares of aforementioned claw-like slide bar, the periphery of described inner gear forms useful serration recess with the ratchet that blocks described claw-like slide bar.
2, automatic bicycle speed variator according to claim 1 is characterized in that, described planetary rotating shaft be fixed in an integrally formed bearing seat of described wheel hub on, and described sun gear is fixed on an end of bicycle rear wheel hub.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63319571A JPH02164685A (en) | 1988-12-20 | 1988-12-20 | Automatic speed change gear for bicycle |
| JP319571/88 | 1988-12-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043673A CN1043673A (en) | 1990-07-11 |
| CN1017978B true CN1017978B (en) | 1992-08-26 |
Family
ID=18111750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89109221 Expired CN1017978B (en) | 1988-12-20 | 1989-12-08 | Automatic gearshift device for bicycle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH02164685A (en) |
| CN (1) | CN1017978B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1483631B (en) * | 2002-12-14 | 2012-07-04 | 王力军 | Rear gear wheel for bicycle |
| KR100901436B1 (en) * | 2008-08-04 | 2009-06-05 | 서달원 | Accelerator for bicycle for driving speed elevation |
| DE202009018527U1 (en) * | 2008-12-11 | 2012-01-18 | Robert Bosch Gmbh | Hybrid drive for an electric bicycle |
| KR101135884B1 (en) * | 2009-07-08 | 2012-04-17 | 윤근수 | Power transmission apparatus of chainless bicycle |
| GB2474830A (en) * | 2009-08-14 | 2011-05-04 | Edward Bolam | Gearing arrangement with planet gears having different relative sizes |
| KR101321967B1 (en) * | 2011-01-11 | 2013-10-28 | 조광호 | Transmission |
| KR101147219B1 (en) * | 2010-01-11 | 2012-05-25 | 조광호 | Bicycle transmission |
| WO2011084030A2 (en) * | 2010-01-11 | 2011-07-14 | 이남수 | Transmission system |
| CN101886690B (en) * | 2010-07-12 | 2013-05-22 | 罗建国 | Rigid transmission engaged continuously variable transmission |
| US9976630B2 (en) * | 2016-05-20 | 2018-05-22 | Kim Leung Luk | Smart gearing system for bicycle |
| US10633056B2 (en) * | 2017-04-12 | 2020-04-28 | Tae Hong Ha | Bicycle with automatic transmission |
| CN111336235B (en) * | 2020-03-05 | 2021-04-30 | 江苏虹安精密机械制造有限公司 | Integral flexible duplex sprocket |
| JP7331741B2 (en) * | 2020-03-11 | 2023-08-23 | トヨタ紡織株式会社 | seat lifter |
| IT202100012764A1 (en) | 2021-05-18 | 2022-11-18 | Stefano Revel | AUTOMATIC CONTINUOUSLY VARIABLE RATIO GEARBOX FOR TWO-WHEEL VEHICLES |
| IT202200004451A1 (en) | 2022-03-10 | 2023-09-10 | Stefano Revel | CONTINUOUSLY VARIABLE GEARBOX FOR TWO-WHEEL VEHICLES |
-
1988
- 1988-12-20 JP JP63319571A patent/JPH02164685A/en active Pending
-
1989
- 1989-12-08 CN CN 89109221 patent/CN1017978B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02164685A (en) | 1990-06-25 |
| CN1043673A (en) | 1990-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| 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 |