CN1235767C - Planetary gear stepless variable-speed transmission - Google Patents
Planetary gear stepless variable-speed transmission Download PDFInfo
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- CN1235767C CN1235767C CN 03108912 CN03108912A CN1235767C CN 1235767 C CN1235767 C CN 1235767C CN 03108912 CN03108912 CN 03108912 CN 03108912 A CN03108912 A CN 03108912A CN 1235767 C CN1235767 C CN 1235767C
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- planetary gear
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- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 3
- 235000011613 Pinus brutia Nutrition 0.000 claims description 3
- 241000018646 Pinus brutia Species 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
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- 230000033001 locomotion Effects 0.000 description 19
- 241001247821 Ziziphus Species 0.000 description 4
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- 238000005096 rolling process Methods 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
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Abstract
The present invention discloses a planetary gear stepless variable-speed transmission device for a bicycle, which mainly comprises planetary gears, cylindrical ferrules, gear rings, a crank, and internal teeth, wherein two planetary gears are respectively loosely sheathed on the crank, the end face of each planetary gear is fixedly provided with a cylindrical ferrule, and each planetary gear is meshed with the internal tooth on each gear ring; the center of circle of each ferrule is on the reference circle of the planetary gear; the central hole of each planetary gear is in the internal circle of the ferrule. The planetary gear stepless variable-speed transmission device for a bicycle has the advantages of convenient operation and labor saving, and also has the advantage that the operation performance of the variable speed transmission of bicycles is effectively improved, particularly, the speed regulation of the structure can be optionally carried out in the process of the running of bicycles. The speed regulation becomes stable and reliable through the variable speed transmission of planetary gears, so the planetary gear stepless variable-speed transmission device has positive operation significance for enhancing the mechanical transmission efficiency of bicycles.
Description
Technical field
The present invention relates to a kind of bicycle drive, particularly a kind of planetary gear vari-speed drive of bicycle.
Background technology
At present, bicycle power all is that the transmission by chain and sprocket wheel realizes that particularly variable speed bicycle is installed the different sprocket wheel of several diameters at axis on Hou Shaft, by changing the step change of chain and the engagement realization bicycle of the sprocket wheel of different-diameter.This structure mainly contains following shortcoming: outward appearance is indecency, and transmission can not seal; Wearing and tearing are big in the transmission; Need special chain tension adjusting device; Take off chain easily.
Summary of the invention
The objective of the invention is provides the planetary gear vari-speed drive of bicycle that a kind of Jie structure Jian Dan, Tone speed is reliable, aesthetic in appearance, mechanical efficiency is high for the deficiency that solves above-mentioned technology.
In order to achieve the above object, the planetary gear vari-speed drive of bicycle that the present invention is designed, it mainly comprises, planetary wheel, cylinder barrel shaped lasso, gear ring, crank throw, internal tooth, pine is overlapped two planetary wheels respectively on crank throw, the fixed cylinder barrel shaped lasso of difference on planetary end face, the internal gearing on planetary wheel and the gear ring; The center of circle of lasso is on planetary reference circle; Planetary centre hole is in the interior circle of lasso.For governing speed easily, gear ring is made up of internal tooth, external tooth, and the number of teeth of gear ring is the twice with the number of teeth of its planet gear meshed, worm screw and external tooth engagement, at the end of worm screw by steel rope and handle wheel binding.In order to become the linear reciprocating motion of lasso by planetary planet motion rotatablely moving of double throw axis input.The cylinder barrel shaped lasso is socketed in respectively in the hole of two speed governing frames, and tooth bar is fixed together with the side of speed governing frame respectively, and respectively with mono-directional overrun clutch on gear mesh.Reasonable arrangement for structure, mono-directional overrun clutch is fixed on the tween drive shaft of pivoted arm, and Two limit axle is housed on pivoted arm, and planetary wheel is set on the axle of limit, planetary wheel meshes with gear ring and output gear simultaneously, and output gear is fixed on the backshaft skin external part of bicycle.The two ends that are loaded on the double throw axis in the bearing seat are stretched out by saturating lid, and the other end links to each other with the crank throw that is 180 degree and symmetry is mutually arranged respectively.In addition, the internal tooth on the gear ring described herein comprises by chain and constitutes the version that gear can be turned round thereon; Hole in the described speed governing frame can be an oval shape, and the waist of oval shape can be a linearity.
In order further to understand essence of the present invention, from structural analysis and experiment as can be known: mesh in gear ring and gear are formed and gear ring fixedly the time, this engagement is equivalent to reference circle (pitch circle) Zhou Shangzuo pure rolling in the reference circle (pitch circle) of gear ring of gear.The round at a point of going up of gear compound graduation this moment is done the hypocycloid motion with respect to the gear ring reference circle.Equal the planetary reference diameter of two-fold if satisfy the reference diameter of gear ring, the straight-line motion by the geometric centre of gear ring is changed in the trochoid motion of at a point on the then planetary reference circle.One of key technology of the present invention is: will a bit expand as lasso on the planetary wheel reference circle and must satisfy following 3 points by Shall: the center of circle of first lasso must Shall on planetary reference circle; It two is that the interior circle of lasso must be completely contained in planetary centre hole in it by Shall; It three is that lasso must be cemented on the planetary end face by Shall.When planetary wheel and gear ring are formed the planet engagement, with the motion of the affixed lasso of planetary wheel straight-line motion for the geometric centre by gear ring.When planetary wheel reference circle (pitch circle) week in gear ring reference circle (pitch circle) was rolled a week, the lasso on it was then along the straight-line motion by gear ring center, and stroke is the reference diameter of gear ring.The straight-line motion of lasso is passed to the speed governing frame that is nested on the lasso excircle, the tooth bar that is cemented in its side passed to straight-line motion again by the speed governing frame, and tooth bar is passed to its straight-line motion with its ingear overriding clutch again and made overriding clutch produce the rotation of Two direction.Because this device is placed identical and 180 lasso, planetary wheel, speed governing frame, tooth bar and the overriding clutchs of spending that interlace of Two group structure simultaneously.Its purpose has Two: the first is changed into the continuous rotation of passing to the pivoted arm tween drive shaft with rotating the intermittence of overriding clutch; It two is to protect when the Certificate tooth bar is subjected to pulling force just can make the overriding clutch forward rotation, and drives pivoted arm and rotate, and bicycle is moved ahead.When tooth bar was subjected to thrust, overriding clutch oppositely dallied.The rigidity of this design Ke Bao Certificate tooth bar is little, and sectional dimension is little, the unstable phenomenon in the transmission of having kept away rabbit.
When pivoted arm rotates, form a speed increaser by the gear ring, pivoted arm, a Two planetary wheel and the output gear that are installed in Zi driving Hou Shaft place.The motion of (its over-speed gear ratio i=Z25/Z24+Z25) speed increaser can make output gear obtain the rotating speed of 3 times of left and right sides double throw axis, and is the motion of identical rotation direction.
Because the reasons in structure of mono-directional overrun clutch does not allow the pivoted arm counter-rotation.Therefore, bicycle rear can not reverse.In order to make the bicycle rear reversing freely, this structure spy makes several sour jujube grooves and is furnished with suitable ratchet on the excircle of gear ring.When bicycle advanced, ratchet was stuck in the sour jujube groove of gear ring, and gear ring is fixed.When bicycle rear fell back, because pivoted arm fixes, so output gear, planetary wheel and gear ring were formed and are Dinged the Shaft train.Then the bicycle rear reversing will be exported by gear ring by output gear, planetary wheel.
In order further to understand speed change situation of the present invention, its principle of work is as follows: on 1/4 excircle of gear ring, be shaped on helical tooth and and worm mesh, worm screw is formed speed governing system jointly with rope sheave, steel wire and handle wheel again, handle wheel is installed in the Handlebar of bicycle place, and steel wire penetrates in the steel pipe of bicycle tripod.When needs change the speed of bicycle, the turning handle wheel, by steel wire, rope sheave worm screw is rotated, then gear ring also rotates a low-angle α, thereby the lasso that causes moving linearly does that Tone speed frame still is a horizontal rectilinear motion with straight-line motion of the mistakes gear ring center of horizontal direction tilt alpha angle, but its stroke is S=Dsin α.Because the gear motion of worm screw and gear ring has self-locking performance, after the displacement angle α of gear ring set up, the movement travel of speed governing frame was fixed (D is the reference diameter of gear ring).Therefore the speed of advance of bicycle is a unmodified, has only the displacement angle α that sets up gear ring again just can change the speed of advance of bicycle.Theoretically, the speed of advance of bicycle can become required maximum speed by zero.But therefore only in the actual travel,, want Tone decide angle [alpha] in 30 degree scopes as long as satisfy certain velocity variations scope, just can make maximum speed change into its half thereby speed governing is rapid, reliably, accurate.
The resulting planetary gear vari-speed drive of bicycle of the present invention, it is extremely convenient, laborsaving to use, and has improved the speed governing of the in-use performance, particularly this structure of bicycle shift transmission effectively and can arbitrarily carry out in bicycle moves ahead process.And, the machinery driving efficiency that improves bicycle had very active operation significance owing to, make speed governing more reliable and more stable by the planetary gear stepless speed changing transmission.
Description of drawings
Fig. 1 is the structural representation of planetary gear vari-speed drive of bicycle;
Fig. 2 is the schematic side view of planetary gear vari-speed drive of bicycle;
Fig. 3 is the planetary gear vari-speed drive of bicycle perspective view;
Fig. 4 is a bicycle planet gear transmission structure scheme drawing.
The specific embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, the described planetary gear vari-speed drive of bicycle of present embodiment, it mainly comprises, planetary wheel 4, cylinder barrel shaped lasso 5, gear ring 6, crank throw 7, internal tooth 8.Pine is overlapped two planetary wheels 4 respectively on crank throw 7, the fixed cylinder barrel shaped lasso 5 of difference on the end face of planetary wheel 4, internal tooth 8 engagements on planetary wheel 4 and the gear ring 6; The center of circle of lasso 5 is on the reference circle of planetary wheel 4; The centre hole of planetary wheel 4 is in the interior circle of lasso 5.For governing speed gear ring 6 easily is made up of internal tooth 8, external tooth 9, the number of teeth of gear ring 6 is the twices with the number of teeth of its planet gear meshed 4, and worm screw 11 and external tooth 9 engagements link by steel rope 12 and handle wheel 15 at the end of worm screw 11.In order to become the linear reciprocating motion of lasso by planetary planet motion rotatablely moving of double throw axis input.Cylinder barrel shaped lasso 5 is installed in respectively in the hole of two speed governing frames 16, and tooth bar 17 is fixed together with the side of speed governing frame 16 respectively, and respectively with mono-directional overrun clutch 18 on gear 19 engagements.Reasonable arrangement for structure, mono-directional overrun clutch 18 is fixed on the tween drive shaft 21 of pivoted arm 20, Two limit axle 22 is housed on pivoted arm 20, planetary wheel 23 is set on the limit axle 22, planetary wheel 23 meshes with gear ring 24 and output gear 25 simultaneously, and output gear 25 is fixed on the backshaft skin external part of bicycle.The two ends that are loaded on the double throw axis 3 in the bearing seat 1 are stretched out by saturating lid 2, and the other end links to each other with the crank throw 7 that is 180 degree and symmetry is mutually arranged respectively.
As shown in Figure 4, because the reasons in structure of mono-directional overrun clutch 18 does not allow pivoted arm 20 counter-rotation.Therefore, bicycle rear can not reverse.In order to make the bicycle rear reversing freely, this structure spy makes several sour jujube grooves 27 and is furnished with suitable ratchet 26 on the excircle of gear ring 24.When bicycle advanced, ratchet 26 was stuck in the sour jujube groove 27 of gear ring 24, made gear ring 24 fixing.When bicycle rear fell back, because pivoted arm 20 is fixing, so output gear 25, planetary wheel 23 and gear ring 24 formed and Ding the Shaft train, and then the bicycle rear reversing will be exported by gear ring 24 by output gear 25, planetary wheel 23.
Claims (2)
1. planetary gear vari-speed drive of bicycle, it mainly comprises planetary wheel (4), cylinder barrel shaped lasso (5), gear ring (6), crank throw (7), internal tooth (8), it is characterized in that going up pine cover two planetary wheels (4) respectively at crank throw (7), a difference fixed cylinder barrel shaped lasso (5) on the end face of planetary wheel (4), internal tooth (8) engagement on planetary wheel (4) and the gear ring (6), the center of circle of lasso (5) is on the reference circle of planetary wheel (4), the centre hole of planetary wheel (4) is in the interior circle of lasso (5), described gear ring (6) is by internal tooth (8), external tooth (9) is formed, the number of teeth of gear ring (6) is the twice with the number of teeth of its planet gear meshed (4), the engagement of worm screw (11) and external tooth (9) links by steel rope (12) and handle wheel (15) at the end of worm screw (11); Described cylinder barrel shaped lasso (5) is socketed in respectively in the hole of two speed governing frames (16), and tooth bar (17) is fixed together with the side of speed governing frame (16) respectively, and respectively with mono-directional overrun clutch (18) on gear (19) engagement; Described mono-directional overrun clutch (18) is fixed on the tween drive shaft (21) of pivoted arm (20), Two limit axle (22) is housed on pivoted arm (20), planetary wheel (23) is set on the limit axle (22), planetary wheel (23) meshes with gear ring (24) and output gear (25) simultaneously, and output gear (25) is fixed on the backshaft skin external part of bicycle.
2. planetary gear vari-speed drive of bicycle according to claim 1, the two ends that it is characterized in that being loaded on the double throw axis (3) in the bearing seat (1) are stretched out by saturating lid (2), and the other end links to each other with the crank throw (7) that is 180 degree and symmetry is mutually arranged respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03108912 CN1235767C (en) | 2003-04-01 | 2003-04-01 | Planetary gear stepless variable-speed transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03108912 CN1235767C (en) | 2003-04-01 | 2003-04-01 | Planetary gear stepless variable-speed transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1439569A CN1439569A (en) | 2003-09-03 |
| CN1235767C true CN1235767C (en) | 2006-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03108912 Expired - Fee Related CN1235767C (en) | 2003-04-01 | 2003-04-01 | Planetary gear stepless variable-speed transmission |
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| Country | Link |
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| CN (1) | CN1235767C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100954300B1 (en) * | 2010-02-09 | 2010-04-22 | (주)엠비아이 | Assisting device for shift control unit of bicycle transmission |
| CN108502094B (en) * | 2018-05-14 | 2024-04-02 | 赵宁 | Planetary gear stepless speed change system |
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2003
- 2003-04-01 CN CN 03108912 patent/CN1235767C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1439569A (en) | 2003-09-03 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Ningbo Little Star Cycle Co., Ltd. Assignor: Zhejiang Hydraulic & Hydroelectric Junior School Contract fulfillment period: 2009.7.16 to 2014.7.15 contract change Contract record no.: 2009330001795 Denomination of invention: Planetary gear stepless variable-speed transmission Granted publication date: 20060111 License type: Exclusive license Record date: 2009.8.3 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.16 TO 2014.7.15; CHANGE OF CONTRACT Name of requester: NINGBO LITTLE STAR BICYCLE INDUSTRY CO., LTD. Effective date: 20090803 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060111 Termination date: 20120401 |