CN1193586A - Speed gear mounted in rear hub of bicycle - Google Patents
Speed gear mounted in rear hub of bicycle Download PDFInfo
- Publication number
- CN1193586A CN1193586A CN97101192A CN97101192A CN1193586A CN 1193586 A CN1193586 A CN 1193586A CN 97101192 A CN97101192 A CN 97101192A CN 97101192 A CN97101192 A CN 97101192A CN 1193586 A CN1193586 A CN 1193586A
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- China
- Prior art keywords
- ratchet
- sour jujube
- circle
- jujube seat
- seat
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- 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.)
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- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
A three-shift speed variator in back axle of bicycle is composed of panetary gear mechanism. As the ratchet base for input power is engaged with internal toothed body of planetary gear mechanism to form overriding clutch, no neutral gear exists when speed is varying. Its advantages are reliable and smooth speed variation, simple structure, long service life and small size.
Description
The present invention relates to a kind of bicycle speed-varying unit, particularly speed gear mounted in rear hub.
The internal speed variator of bicycle of cause three speed changes uses dental clutch can influence speed change, in order to address this problem the three speed change internal speed changers that just occurred no dental clutch before 20 years, this internal speed changer is owing to be to drive whole planetary gear mechanism to realize speed change, structure to planetary gear mechanism has certain requirement, and manufacturing cost is higher; And the retracing spring elastic force needs of control planetary gear mechanism are bigger, and used power also wants big relatively during operation; In addition, inner tooth body quickens to dally in the enclosure when mid ranger (sprocket wheel and shell 1:1 transmission) transmission, can increase certain transmission resistance and component wear." internal speed variator for cycle rear axle " that China Patent No. CN2167038Y proposes be not though scheme has dental clutch, the whole planetary gear mechanism that also do not need to slide is realized three speed changes, but this device must be located at two power-transfer clutchs two sides of planetary gear mechanism, and on center shaft, open two radially slotted holes, influenced center shaft intensity more significantly; In addition, the ratchet circle be nested the back the symmetric configuration of inner tooth body two sides during in the mid ranger transmission two groups of ratchet circles and inner tooth body be that opposite shell is quickened idle running, a plurality of chimeric circle extrusion friction outer casing inner walls easily increase the transmission resistance; Simultaneously, quicken the wearing and tearing that idle running has also aggravated gear because of inner tooth body.
The purpose of this invention is to provide a kind of power-transfer clutch that will control speed change and be located at planetary gear mechanism one side, and three variable speed bicycle speed gear mounted in rear hub of the whole planetary gear mechanism that when speed change, need not slide, it is random speed change not only, and operate light, power transmission loss is little.
The object of the present invention is achieved like this: a planetary gear mechanism that is made of center shaft, star-wheel, star wheel frame, spider gear shaft, inner tooth body is arranged in the shell; Star wheel frame and shell constitute the overdrive clutch structure; Stretch out from the inner tooth body inwall ratchet circle rear end of long ratchet on the inner tooth body on click spring effect lower front end engagement shell, the separable ratchet circle of its front end when long ratchet rear end is extruded, and inner tooth body and shell have constituted controlled overdrive clutch structure; Engagement star-wheel and the center shaft that stretches out shell two ends constitute to rotate with steel bowl seat that the left end and the shell right-hand member of shell are equipped with sprocket wheel respectively and connect, and steel bowl seat connects with the rotation of shell formation; The ratchet circle is arranged on star wheel frame and the inner tooth body, and ratchet circle kink is on the sour jujube seat; Kink has by the ratchet of click spring effect constituting on the sour jujube seat of sliding engaged with steel bowl seat on the center shaft, and when the sour jujube seat slided, the ratchet on the sour jujube seat was engageable or separate ratchet circle on star wheel frame and the inner tooth body; Can push or decontrol the big speed change circle of long ratchet rear end on the inner tooth body on the sour jujube seat in addition.Power is from the output of sprocket wheel input shell.Slide three positions by the sour jujube seat, go up long ratchet rear end and the ratchet that make big speed change circle extruding or decontrol inner tooth body mesh or separate corresponding ratchet circle and can make the third speed gear ratio is arranged between sprocket wheel and the shell.The slip of sour jujube seat is controlled by steering unit, and steering unit can drive the speed change pin of contact sour jujube seat and the sour jujube seat is slided by the axial hole of center shaft end face, and radially slotted hole and sour jujube seat that the speed change pin passes on the center shaft can relatively rotate.Speed change pin and sour jujube seat are reset spring control together and can reset after sliding.
Purpose of the present invention also can realize by following measure:
Ratchet circle on the star wheel frame can be combined tooth replace, ratchet engageable or that separate ratchet circle on the star wheel frame is also used in conjunction with tooth and is replaced on the sour jujube seat, the sour jujube seat can make the two engagement or one way engagement or separation by sliding; At this moment sour jujube seat and inner tooth body constitute the overdrive clutch structure, but perhaps one way engagement are arranged on the sour jujube seat or separate the ratchet of ratchet circle on the inner tooth body.
When not taking above-mentioned measure, following measure can also be arranged:
The mal engagement can appear when using one pair of ratchet to mesh two ratchet circles at the same time on the sour jujube seat, in order to prevent that this rough sledding from can set up one pair again by the ratchet of click spring effect on the sour jujube seat, but in when, one pair of ratchet taking place meshing two ratchet circles simultaneously another pair ratchet ratchet circle of normal engaged and do not make the idle running of sour jujube seat still.
When not adopting above-mentioned two measures, also following measure can be arranged:
In order to shorten the sliding stroke of sour jujube seat, adorn on the sour jujube seat one pair by the engageable star wheel frame of click spring effect front end on the long ratchet that stretches out from sour jujube seat inwall of ratchet circle rear end, the separable ratchet circle of its front end when long ratchet rear end is extruded, sour jujube seat and star wheel frame constitute controlled overdrive clutch structure; Also has one pair on the sour jujube seat by the ratchet of ratchet circle on the engageable inner tooth body of click spring effect; At this moment speed change pin does not contact the sour jujube seat and is contained on the slipping ring, and the slipping ring kink is on center shaft, and slipping ring also slides when driving the speed change pin, and slipping ring can push the long ratchet rear end on the sour jujube seat when sliding a gear (the sour jujube seat does not slide); Slipping ring can contact the sour jujube seat when sliding shelves again and drive the sour jujube seat and slide and to make big speed change circle extruding on the sour jujube seat live long ratchet rear end on the inner tooth body.By slipping ring extruding or decontrol long ratchet rear end on the sour jujube seat and the long ratchet rear end on big speed change circle extruding or the relieving inner tooth body can make equally the third speed gear ratio is arranged between sprocket wheel and the shell.Slipping ring and sour jujube seat are reset spring control respectively and can reset after sliding.
Advantage of the present invention is as follows:
1, owing to adopt the gear shift mode of slip sour jujube seat, thus operate light and random, and reliable operation.
2, because planetary gear mechanism is skid-resistant and can be by the shell axial constraint, so the higher inner tooth body of manufacture difficulty and cost does not need to fuse, unfavorable factor restriction in the time of can avoiding making has tangible effect to cost-cutting with improving the quality of products.
3, power-transfer clutch is located at a rear flank of planetary gear mechanism, need only open a radially slotted hole on the center shaft, helps guaranteeing the intensity of center shaft; In addition, inner tooth body does not relatively rotate to reduce transmission resistance and unnecessary component wear with shell in the time of also can realizing (yet can not realizing for certain purpose) mid ranger transmission easily.
Accompanying drawing is a structural representation of the present invention.Among the figure: the 1-center shaft; 2-axle shelves; The 3-left steel bowl; The 4-steel ball; 5-ratchet circle; The 6-ratchet; The 7-star wheel frame; The 8-star-wheel; The 9-spider gear shaft; 10-ratchet circle; The 11-inner tooth body; 12 '-no ratchet position; 12-ratchet circle; 13-ratchet circle; The long ratchet of 14-; The 15-right steel bowl; The 16-sprocket wheel; The 17-steel ball; The 18-jump ring; 19-steel bowl seat; The 20-steel ball; 21-axle shelves; The 22-screw; The 23-retracing spring; 24-sour jujube seat; The big speed change circle of 25-; The 26-detent pin; The 27-detent pin; The 28-slipping ring; 29-speed change pin; The 30-elastic scheibe; The 31-ratchet; 32-is slotted hole radially; The 33-shell; The 34-center gear; The 35-push rod.
Below in conjunction with accompanying drawing in detail embodiments of the invention are described in detail:
Center shaft (1) in the shell (33) is gone up center gear (34) engagement and is installed in star-wheel (8) on the star wheel frame (7) with spider gear shaft (9); Star wheel frame (7) is gone up the ratchet circle (5) on ratchet (6) the engagement shell (33) of being upspring by click spring by spider gear shaft (9) and has been constituted the overdrive clutch structure with shell (33); The inner tooth body (11) of engagement star-wheel (8) is gone up to be equipped with by click spring last ratchet circle (13) rear end of the engageable shell of front end (33) of upspringing with detent pin (26) and is stretched out the long ratchet (14) of inner tooth body (11) inwall; Center shaft (1) two end by axle shelves (2), axle shelves (21), steel ball (4), steel ball (20) respectively with shell (33) on left steel bowl (3) and steel bowl seat (19) that sprocket wheel (16) is housed constitute to rotate and connect, steel bowl seat (19) connects by the right steel bowl (15) on steel ball (17) the contact shell (33) and with the rotation of shell (33) formation; Jump ring (18) blocks sprocket wheel (16); There is the right steel bowl (15) of ratchet circle (13) to use thread connection on shell (33); The sour jujube seat (24) of kink on center shaft (1) constitutes sliding engaged by key tooth engagement steel bowl seat (19) and with steel bowl seat (19); Sour jujube seat (24) is gone up with detent pin (27) ratchet (31) of being upspring by click spring is installed, engageable or separation ratchet circle (10) and ratchet circle (12) of ratchet (31) when sour jujube seat (24) slides; It is big speed change circle (25) that sour jujube seat (24) is gone up the big position of diameter, and when sour jujube seat (24) slided, big speed change circle (25) can push or decontrol long ratchet (14) rear end on the inner tooth body (11); The speed change pin (29) of contact sour jujube seat (24) passes on the center shaft (1) slotted hole (32) radially and is fixed on the slipping ring (28) in the sour jujube seat (24), and slipping ring (28) is blocked by elastic scheibe (30) and constitutes to rotate with sour jujube seat (24) and connect; The retracing spring of being sealed by screw (22) (23) is arranged in the axial hole of center shaft (1) right-hand member, and retracing spring (23) withstands on the speed change pin (29) by guide rod; Push rod (35) on the steering unit is arranged in the axial hole of center shaft (1) left end; The retracing spring of control sour jujube seat (24) and speed change pin (29) also can be enclosed within on the center shaft (1), and spring one end is pressed in the last other end of slipping ring (28) and is pressed on the axle shelves (21).Shell has the floral disc of wearing spoke on (33).Speed-change process is such: live long ratchet (14) rear end because of withstood sour jujube seat (24) by push rod (35) in low order end position (as accompanying drawing) at this moment big speed change circle (25) extruding, ratchet (31) mesh ratchet gear circle (12), inner tooth body (11) main gear when sprocket wheel (16) dextrorotation passes, star wheel frame (7) are meshed shell (33) deceleration output by transmission; When sour jujube seat (24) slided 5 millimeter left, big speed change circle (25) was decontroled the extruding to long ratchet (14) rear end, and ratchet (31) continues mesh ratchet gear circle (12), at this moment sprocket wheel (16) and shell (33) transmissions in 1: 1 (mid ranger); When sour jujube seat (24) slided 5 millimeter more left, ratchet (31) separated back mesh ratchet gear circle (10) with ratchet circle (12), and star wheel frame (7) main gear at this moment, inner tooth body (11) are meshed the output of shell (33) speedup by transmission.
With reference to the accompanying drawings, if the width of ratchet circle (10) with ratchet circle (12) exchanged, big speed change circle (25) relaxes 5 millimeter.Big speed change circle (25) can continue extruding and lives long ratchet (14) rear end when sour jujube seat (24) slides 5 millimeter left, and ratchet (31) then separates the ratchet circle (12) on the inner tooth body (11) and meshes ratchet circle (10) on the star wheel frame (7); Big speed change circle (25) can be decontroled the extruding to long ratchet (14) rear end when sour jujube seat (24) slides 5 millimeter more left.Such arrangement can make between sprocket wheel (16) and the shell (33) equally the third speed gear ratio, but inner tooth body (11) is in relative rotation with shell (33) during the mid ranger transmission.If in, the grating of pawl-less during slow second gear transmission, perhaps other reason still can adopt this scheme.
Also can set up one on the sour jujube seat (24) and pay the mal engagement that the identical ratchet of ratchet (31) occurs when meshing two ratchet circles simultaneously to prevent one pair of ratchet.The ratchet of setting up is by another root click spring effect and engageable or separate ratchet circle (10) or engageable ratchet circle (12).The ratchet of setting up also is contained on the detent pin (27).At this moment, detent pin (27) 5 millimeter that lengthen, the axial dimension of sour jujube seat (24) also lengthens 5 millimeters, and ratchet circle (10) on the star wheel frame (7) or the ratchet circle (12) on the inner tooth body (11) also want corresponding relax 5 millimeters, simultaneously the axial dimension of shell (33) 5 millimeter that also lengthen.
Also can take this measure with reference to the accompanying drawings: the ratchet circle (10) on the star wheel frame (7) is changed in conjunction with tooth, increase on sour jujube seat (24) left end, ratchet (31) mesh ratchet gear circle (12) and make sour jujube seat (24) and inner tooth body (11) constitute the overdrive clutch structure in conjunction with tooth; Star wheel frame (7) and sour jujube seat (24) on the ratchet circle (12) one section no ratchet position (12 ') can be arranged, so that can separate ratchet (31) with ratchet circle (12) because of ratchet (31) slips into no ratchet position (12 ') when meshing in conjunction with tooth.On the star wheel frame (7) can be spline tooth or oblique rake tooth in conjunction with tooth, and sour jujube seat (24) left end also can have spline tooth or Elastic Teeth.So-called Elastic Teeth is the tooth that is ejected by spring in the sour jujube seat (24), but this tooth retraction sour jujube seat (24) during by oblique rake tooth extruding, sour jujube seat (24) but by the oblique rake tooth on the Elastic Teeth one way engagement star wheel frame (7).
Also can take a kind of measure with reference to the accompanying drawings: circlip (30) is removed, slipping ring (28) is slided into by star wheel frame (7) position, radially slotted hole (32) is also to shifting left; Set up one pair on the sour jujube seat (24) by the last ratchet circle (10) of the engageable star wheel frame of click spring effect front end (7), the long ratchet that stretch out from sour jujube seat (24) inwall the rear end, the separable ratchet circle of its front end (10) when long ratchet rear end is pushed by slipping ring (28).When the sour jujube seat (24) in the accompanying drawing when sliding into high order end, slipping ring (28) is decontroled long ratchet rear end makes long ratchet mesh ratchet circle (10) on the star wheel frame (7), and ratchet (31) is the ratchet circle (12) on the one way engagement inner tooth body (11) all the time, at this moment is the speedup shelves; Moving when slipping ring (28) the sour jujube seat (24) that moves right when sliding 5 millimeter, but long ratchet rear end is extruded its front end separated with ratchet circle (10), at this moment is mid ranger; When slipping ring (28) slides, can contact sour jujube seat (24) to the right again and drive sour jujube seat (24) 5 millimeter of sliding together to the right, make big speed change circle (25) extruding live long ratchet (14) rear end on the inner tooth body (11), at this moment export for slowing down.Can reset after sour jujube seat (24) is slided, will overlap a retracing spring on the sour jujube seat (24) in addition again, spring one end is pressed on the steel bowl seat (19), and the other end is pressed on the sour jujube seat (24).Set up long ratchet and also be contained on the detent pin (27), at this moment the axial dimension of inner tooth body (11), sour jujube seat (24), shell (33) suitably increases, and detent pin (27) also will extend.
For ratchet can successfully be reciprocatingly slided between two ratchet circles, ratchet circle (10) is wanted chamfering with the end face that ratchet circle (12) contacts with each other.
Claims (6)
1, a planetary gear mechanism that is made of center shaft (1), star-wheel (8), star wheel frame (7), spider gear shaft (9), inner tooth body (11) is arranged in a kind of shell of internal speed variator for cycle rear axle (33); Star wheel frame (7) constitutes the overdrive clutch structure with shell (33); The ratchet circle of long ratchet (14) on the engageable shell of click spring effect lower front end (33) of being adorned on the inner tooth body (1), the inwall of inner tooth body (11) is stretched out in the rear end, and inner tooth body (11) constitutes controlled overdrive clutch structure with shell (33); Engagement star-wheel (8) and the center shaft (1) that stretches out shell (33) two ends respectively with shell (33) left end and shell (33) right-hand member on sprocket wheel is housed steel bowl seat (19) constitute to rotate and connect, steel bowl seat (19) connects with the rotation of shell (33) formation; Steering unit can the axial hole by center shaft (1) end face drives and passes on the center shaft (1) the radially speed change pin (29) of slotted hole, be reset spring control of speed change pin (29), it is characterized in that: center shaft (1) is gone up the sour jujube seat (24) of kink and steel bowl seat (19) formation sliding engaged, and sour jujube seat (24) contact speed change pin (29) also can be controlled by speed change pin (29); On star wheel frame (7) and the inner tooth body (11) the ratchet circle is arranged, ratchet circle kink is on sour jujube seat (24); Have on the sour jujube seat (24) by the ratchet of click spring effect and the big speed change circle that can push or decontrol last long ratchet (14) rear end of inner tooth body (11).
2, internal speed variator for cycle rear axle according to claim 1, it is characterized in that: the combined tooth of the ratchet circle on the star wheel frame (7) replaces, sour jujube seat (24) is gone up engageable or is separated the also combined tooth replacement of ratchet that star wheel frame (7) is gone up the ratchet circle, sour jujube seat (24) and inner tooth body (11) constitute the overdrive clutch structure, perhaps sour jujube seat (24) but on one way engagement is arranged or separates the ratchet that inner tooth body (11) is gone up ratchet circle (12).
3, internal speed variator for cycle rear axle according to claim 1 is characterized in that: can set up one pair by the ratchet of click spring effect on the sour jujube seat (24).
4, internal speed variator for cycle rear axle according to claim 1 is characterized in that: be equipped with one pair on the sour jujube seat (24) by the click spring effect and the engageable star wheel frame of front end (7) is gone up the long ratchet that stretches out from sour jujube seat (24) inwall ratchet circle (10) rear end and the one pair ratchet of ratchet circle (12) on the engageable inner tooth body (11) under the click spring effect; Speed change pin (29) does not contact sour jujube seat (24) and is fixed on the slipping ring (28) on the kink center shaft (1), slipping ring (28) can push or decontrol sour jujube seat (24) and go up long ratchet rear end and drive sour jujube seat (24), and slipping ring (28) and sour jujube seat (24) spring that is reset is respectively controlled.
5, internal speed variator for cycle rear axle according to claim 1 is characterized in that: the retracing spring of control speed change pin (29) and sour jujube seat (24) can be encapsulated in the center shaft (1) or go up one one end of cover at center shaft (1) and be pressed in slipping ring (28) sour jujube seat (24) in and go up the spring that the other end is pressed in spool grade with screw.
6, internal speed variator for cycle rear axle according to claim 1, it is characterized in that: the ratchet on the sour jujube seat (24) is slidably at two gear mesh ratchet gear circles (12), a P PARK Position P mesh ratchet gear circle (10), big speed change circle (25) slides and decontrols the rear end of long ratchet (14) at two gears, the rear end of a gear long ratchet of extruding (14); Perhaps, the ratchet on the sour jujube seat (24) slides at two gear mesh ratchet gear circles (10), a gear mesh ratchet gear circle (12), and big speed change circle (25) slides and decontrols long ratchet (14) rear end at a gear, and long ratchet (14) rear end is lived in two gear extruding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97101192A CN1193586A (en) | 1997-03-18 | 1997-03-18 | Speed gear mounted in rear hub of bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97101192A CN1193586A (en) | 1997-03-18 | 1997-03-18 | Speed gear mounted in rear hub of bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1193586A true CN1193586A (en) | 1998-09-23 |
Family
ID=5165571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97101192A Pending CN1193586A (en) | 1997-03-18 | 1997-03-18 | Speed gear mounted in rear hub of bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1193586A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357117C (en) * | 2003-11-26 | 2007-12-26 | 日驰企业股份有限公司 | Bicycle speed transmission hub structure |
-
1997
- 1997-03-18 CN CN97101192A patent/CN1193586A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357117C (en) * | 2003-11-26 | 2007-12-26 | 日驰企业股份有限公司 | Bicycle speed transmission hub structure |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |