CN203189631U - Double-arc correcting cycloid gear differential gear train - Google Patents
Double-arc correcting cycloid gear differential gear train Download PDFInfo
- Publication number
- CN203189631U CN203189631U CN201320170648.4U CN201320170648U CN203189631U CN 203189631 U CN203189631 U CN 203189631U CN 201320170648 U CN201320170648 U CN 201320170648U CN 203189631 U CN203189631 U CN 203189631U
- Authority
- CN
- China
- Prior art keywords
- gear
- planet wheel
- correction
- epicycloid
- hypocycloid
- 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
Links
- 238000012937 correction Methods 0.000 claims description 46
- 238000003754 machining Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010862 gear shaping Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Landscapes
- Retarders (AREA)
- Gears, Cams (AREA)
Abstract
The utility model relates to a double-arc correcting cycloid gear differential gear train and belongs to the technical field of gear transmission design of mechanical equipment and gears. The double-arc correcting cycloid gear differential gear train comprises an inner toothed ring, a planet wheel and a central wheel, wherein the planet wheel is installed between the inner toothed ring and the central wheel, a meshed method between the planet wheel and the inner toothed ring is in an internal-contact internal mesh mode, and a meshed method between the planet wheel and the central wheel is in an external-contact internal mesh mode. The double-arc correcting cycloid gear differential gear train is large in lateral gap and top gap, flexible in transmission, small in tooth addendum and tooth dedendum, not prone to being clamped and stagnated, wide in tooth thickness of the root portions of gear teeth, large in bending strength of the root portions of the gear teeth, capable of greatly reducing processing cost, high in transmission efficiency and capable of effectively reducing contact stress.
Description
Technical field
The utility model and a kind of pair of circular arc Machining Modified Cycloidal Gears differential gear train belong to machinery Gear Transmission Design and gear technique field.
Background technique
Gear failure accounts for more than 60% in various mechanical failures, and therefore the research to the gear meshing performance is the important topic of studying both at home and abroad for a long time always.Research at present is main in order effectively to improve performance, quality and the life-span for mechanically operated gear train middle gear, though existing several gear structure type commonly used is in the distinctive feature that has aspect the engagement of raising gear and the transmission performance separately, still there are some problems on the one hand in this reducing power transmission process middle gear contact stress.
The outstanding problem that the distinctive engagement system of involute gear is brought is: along with gear rotational speed raises or the load increasing, the thermal distortion of the gear teeth or mechanically deformation will obviously increase, the distortion of gear and supporting system thereof also can increase, add the installation foozle, therefore can occur inevitably in the gear transmission engaging-in, nibble out impact, the load sudden change, speed fluctuation, and each rank vibration of forming of the different vibration shapes, frequency, thereby reduction transmission accuracy, reduction of service life, reduce bearing capacity, increase vibration noise.Circular tooth gear contacts the involute gear convex surface with convex surface, change over the engagement between spill flank profil and the convex flank profil, has the bearing capacity height, meshing performance is good, the life-span is long, and bearing capacity is than the involute gear height under the similarity condition.But there is subject matter in circular tooth gear: the bearing capacity improvement is difficult, processing technology is cumbersome, circular tooth gear relies on point of contact to move the mode that realizes transmission along facewidth direction, can cause engaging-in and nibble out impact, influence in the stationarity, gear teeth transmission of transmission, contact points is along the transmission of facewidth direction, initial contact point is at increment, and increment is weak link.This gear of cycloidal gear is in transmission, centre distance can not change, if change, its instantaneous transmission ratio is changed, and the cycloidal gear of each parameter just must one special hobboing cutter, the processing cost height, the hobboing cutter that the while is few for the number of teeth, tooth pitch is big manufactures and designs the very big difficulty of existence.
And have the gear structure that also discloses some other forms in the known model utility now, be used for improving gear engagement and transmission performance.
Disclose a kind of less teeth number large coincidence gear among the CN1419064A, the gear-profile curve of planar conjugate meshing condition is satisfied in its strictness.The relative slip rate of this gear is lower than involute gear, though its contact ratio can reach 2, and reduce the minimum number of teeth of standard involute spur gear effectively, I reaches 4 teeth, but the undercut problem of having ignored gear, thereby can cause gear tooth intensity to reduce, this gear reduces its working life in long-term fatigue flake and the wearing and tearing that will cause gear surface in service.A kind of helical gear is disclosed among the CN1153875A, even a kind of continuous phase cutting tooth form in cycloid, involute curve and arc toothed formation particularly, this gear bulk strength is lower, increase beyond the gear engagement radial force, be easy to generate gear teeth fatigue fracture, make gear train assembly reduce the life-span of system significantly because fault takes place frequently, even jeopardize safety because of catastrophic failure.Announced the tooth Shape Design of a kind of pair of pressure angle involute helical teeth externally-engaged cylindrical gear among the CN102374273A, because the master end of such structure gear and the pressure angle of slave end do not wait, therefore, the monodentate flank profil is also asymmetric, can not use traditional model one-tenth, gear shaping method to carry out manufacturing.Must use the non-traditional machining method, so just increase cost of production and process time, and reduced manufacturing efficiency.
The utility model is on the basis of involute gear, circular tooth gear and cycloidal gear and existing known technology, a kind of pair of circular arc Machining Modified Cycloidal Gears differential gear train proposed, this train is improved to interior contact form with existing outer contacting form, thereby reduced the calculating contact stress, its objective is and improve gear meshing characteristic and power transmission performance, thereby two circular arc Machining Modified Cycloidal Gears are applied in the gear train assembly of high contact strength, long-life.
The model utility content
The purpose of this utility model provides a kind of two circular arc Machining Modified Cycloidal Gears differential gear trains simple in structure, to solve the problem that contact strength is low in the existing gear train assembly, the life-span is short.
The utility model is realized by following technological scheme: a kind of pair of circular arc Machining Modified Cycloidal Gears differential gear train comprises ring gear 1, planet wheel 2, central gear 3; Planet wheel 2 is installed between ring gear 1 and the central gear 3, and planet wheel 2 comprises revises epicycloid I 8, correction hypocycloid I 9, pitch circle I 6; Central gear 3 comprises revises epicycloid II 10, correction hypocycloid II 11, pitch circle II 7; Ring gear 1 comprises revises epicycloid III 13, correction hypocycloid III 14, pitch circle III 12; The correction hypocycloid I 9 of planet wheel 2 and the correction epicycloid II 10 concavo-convex engagements of central gear 3, the correction hypocycloid II 11 of central gear 3 and the correction epicycloid I 8 concavo-convex engagements of planet wheel 2, be engagement 5 in the outer contacting, the correction hypocycloid I 9 of planet wheel 2 and the correction epicycloid III 13 concavo-convex engagements of ring gear 1, the correction hypocycloid III 14 of ring gear 1 and the correction epicycloid I 8 concavo-convex engagements of planet wheel 2, engagement 4 in the contact in being, the pitch circle I 6 of planet wheel 2 contacts with central gear 3 engagement places at planet wheel 2 with the pitch circle II 7 of central gear 3, and the pitch circle I 6 of planet wheel 2 contacts with ring gear 1 engagement place at planet wheel 2 with the pitch circle III 12 of ring gear 1.
Described correction epicycloid I 8, correction hypocycloid I 9, correction epicycloid II 10, correction hypocycloid II 11, correction epicycloid III 13, correction hypocycloid III 14 are the equal circular arc of radius.Described ring gear 1 is driving wheel with central gear 3.Described ring gear 1 is identical with the gyration center axis of central gear 3.The rotational axis of described planet wheel 2 revolution is the common center axis of ring gear 1 and central gear 3.A plurality of planet wheels 2 are installed between described ring gear 1 and the central gear 3.
The utility model is according to hertz (H.Hertz) formula:
Wherein, order
, be called synthetic curvature,
, be called composite curve radius.
According to the contact strength computational methods of mechanical parts as can be known, when gear engagement contact during for interior contact, synthetic curvature is with negative sign "-", so the radius of curvature increase, by hertz (H.Hertz) formula its contact stress as can be known
Reduce, thereby contact strength is with respect to the intensity of the convexo-convex extra curvature of involute gear tooth contact with all want height working life, thus the working life that can improve whole differential gear train.
The utlity model has following beneficial effect:
1, sideshake and bottom clearance are bigger, ensuring smooth transmission;
2, addendum and dedendum of the tooth are less, are not easy clamping stagnation;
3, gear teeth root transverse tooth thickness is wideer, and the flexural strength of gear teeth root is bigger;
4, modulus is identical, and the gear that the number of teeth is different can use samely as hobboing cutter, and the hobboing cutter kind is reduced, and can cut down finished cost greatly;
5, in the transmission process, velocity ratio is definite value, and stable drive is reliable, and the speed ratio of taking advantage of a situation is stable;
6, no undercut phenomenon without displacement, all is interior engagement between contacting profile, and its area of contact is big, and contact stress is little, the transmission efficiency height;
7, planet wheel all is the interior engagement that contacts with ring gear with planet wheel and the mesh form of central gear, can effectively reduce contact stress.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is engagement place of the present utility model structural representation;
Fig. 3 is interior contact outer gearing schematic diagram of the present utility model;
Fig. 4 is theory of engagement figure in the interior contact of the present utility model.
Each label is among the figure: 1: ring gear, 2: planet wheel, 3: central gear, 4: engagement, 5 in the interior contact: engagement, 6 in the outer contacting: pitch circle I, 7: pitch circle II, 8: revise epicycloid I, 9: revise hypocycloid I, 10: revise epicycloid II, 11: revise hypocycloid II, 12: pitch circle III, 13: revise epicycloid III, 14: revise the hypocycloid III.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but the content of model utility is not limited to described scope.
Embodiment 1: shown in Fig. 1-4, a kind of pair of circular arc Machining Modified Cycloidal Gears differential gear train comprises ring gear 1, planet wheel 2, central gear 3; Planet wheel 2 is installed between ring gear 1 and the central gear 3, and planet wheel 2 comprises revises epicycloid I 8, correction hypocycloid I 9, pitch circle I 6; Central gear 3 comprises revises epicycloid II 10, correction hypocycloid II 11, pitch circle II 7; Ring gear 1 comprises revises epicycloid III 13, correction hypocycloid III 14, pitch circle III 12; The correction hypocycloid I 9 of planet wheel 2 and the correction epicycloid II 10 concavo-convex engagements of central gear 3, the correction hypocycloid II 11 of central gear 3 and the correction epicycloid I 8 concavo-convex engagements of planet wheel 2, be engagement 5 in the outer contacting, the correction hypocycloid I 9 of planet wheel 2 and the correction epicycloid III 13 concavo-convex engagements of ring gear 1, the correction hypocycloid III 14 of ring gear 1 and the correction epicycloid I 8 concavo-convex engagements of planet wheel 2, engagement 4 in the contact in being, the pitch circle I 6 of planet wheel 2 contacts with central gear 3 engagement places at planet wheel 2 with the pitch circle II 7 of central gear 3, and the pitch circle I 6 of planet wheel 2 contacts with ring gear 1 engagement place at planet wheel 2 with the pitch circle III 12 of ring gear 1.
Correction epicycloid I 8, correction hypocycloid I 9, correction epicycloid II 10, correction hypocycloid II 11, correction epicycloid III 13, correction hypocycloid III 14 are the equal circular arc of radius.Ring gear 1 is driving wheel with central gear 3.Ring gear 1 is identical with the gyration center axis of central gear 3.The rotational axis of planet wheel 2 revolution is the common center axis of ring gear 1 and central gear 3.A plurality of planet wheels 2 are installed between ring gear 1 and the central gear 3.
Claims (6)
1. a two circular arc Machining Modified Cycloidal Gears differential gear train is characterized in that: comprise ring gear (1), planet wheel (2), central gear (3); Planet wheel (2) is installed between ring gear (1) and the central gear (3), and planet wheel (2) comprises revises epicycloid I (8), correction hypocycloid I (9), pitch circle I (6); Central gear (3) comprises revises epicycloid II (10), correction hypocycloid II (11), pitch circle II (7); Ring gear (1) comprises revises epicycloid III (13), correction hypocycloid III (14), pitch circle III (12); The concavo-convex engagement of correction epicycloid II (10) of the correction hypocycloid I (9) of planet wheel (2) and central gear (3), the concavo-convex engagement of correction epicycloid I (8) of the correction hypocycloid II (11) of central gear (3) and planet wheel (2), the concavo-convex engagement of correction epicycloid III (13) of the correction hypocycloid I (9) of planet wheel (2) and ring gear (1), the concavo-convex engagement of correction epicycloid I (8) of the correction hypocycloid III (14) of ring gear (1) and planet wheel (2), the pitch circle I (6) of planet wheel (2) contacts with central gear (3) engagement place at planet wheel (2) with the pitch circle II (7) of central gear (3), and the pitch circle I (6) of planet wheel (2) contacts with ring gear (1) engagement place at planet wheel (2) with the pitch circle III (12) of ring gear (1).
2. according to claim 1 pair of circular arc Machining Modified Cycloidal Gears differential gear train is characterized in that: described correction epicycloid I (8), revise hypocycloid I (9), revise epicycloid II (10), revise hypocycloid II (11), revise epicycloid III (13), revise hypocycloid III (14) and be the circular arc that radius equates.
3. according to claim 1 pair of circular arc Machining Modified Cycloidal Gears differential gear train is characterized in that: described ring gear (1) is driving wheel with central gear (3).
4. according to claim 1 pair of circular arc Machining Modified Cycloidal Gears differential gear train, it is characterized in that: described ring gear (1) is identical with the gyration center axis of central gear (3).
5. according to claim 1 pair of circular arc Machining Modified Cycloidal Gears differential gear train is characterized in that: the rotational axis of described planet wheel (2) revolution is the common center axis of ring gear (1) and central gear (3).
6. according to claim 1 pair of circular arc Machining Modified Cycloidal Gears differential gear train is characterized in that: between described ring gear (1) and the central gear (3) a plurality of planet wheels (2) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320170648.4U CN203189631U (en) | 2013-04-08 | 2013-04-08 | Double-arc correcting cycloid gear differential gear train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320170648.4U CN203189631U (en) | 2013-04-08 | 2013-04-08 | Double-arc correcting cycloid gear differential gear train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189631U true CN203189631U (en) | 2013-09-11 |
Family
ID=49106492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320170648.4U Expired - Fee Related CN203189631U (en) | 2013-04-08 | 2013-04-08 | Double-arc correcting cycloid gear differential gear train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203189631U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234006A (en) * | 2013-04-08 | 2013-08-07 | 昆明理工大学 | Differential gear train of double circular arc modified cycloid gear |
-
2013
- 2013-04-08 CN CN201320170648.4U patent/CN203189631U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103234006A (en) * | 2013-04-08 | 2013-08-07 | 昆明理工大学 | Differential gear train of double circular arc modified cycloid gear |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101975264B (en) | Involute arc tooth profile bevel gear and meshing pair thereof | |
| CN102072308A (en) | Bevel gear with combined arc tooth profile curves and involute tooth profile curves | |
| CN108679167B (en) | Planetary line gear reducer with small tooth difference | |
| CN107387721B (en) | Wide-tooth double-arc harmonic gear | |
| CN107830116B (en) | Point-line meshing helical gear pair with large bearing capacity and small vibration | |
| CN103270344A (en) | Load rating optimised bevel gear toothing | |
| CN101290009A (en) | All-tooth profile engaged dedicated gear | |
| CN103727204A (en) | Determination method for profiling range and profiling curve of cycloidal gear of gerotor motor | |
| CN110805680A (en) | Optimization method of high-strength gear tooth root transition curve | |
| CN110909430A (en) | Harmonic reducer flexible gear cycloid tooth form design method | |
| CN105605196A (en) | High-strength low-vibration low-noise helical gear drive mechanism | |
| CN103234006A (en) | Differential gear train of double circular arc modified cycloid gear | |
| CN203189631U (en) | Double-arc correcting cycloid gear differential gear train | |
| CN100582522C (en) | Perpendicular interleaving axis helical teeth ring surface gear drive | |
| CN108036038A (en) | A kind of herringbone bear of circular arc parabola Multi-contact | |
| CN107327559A (en) | A kind of helical gear of circular arc parabola Multi-contact | |
| CN104266063A (en) | Elliptic-circular compound cycloid rotor oil pump, rotor thereof and rotor design method | |
| CN102094813B (en) | Gear pump with asymmetric combined curved surface tooth form | |
| CN203809612U (en) | Double-circular-arc correction cycloid gear planetary gear train | |
| CN2397284Y (en) | Screw rotor new tooth form for double screw compressor | |
| CN113062961B (en) | Low-slip-rate gear and design method thereof | |
| CN201083251Y (en) | Small mode number high power worm wheel worm gear pair | |
| CN103352971A (en) | Involute ring surface gear transmission | |
| CN102554365B (en) | Involute gear-shaving cutter | |
| CN202349153U (en) | Single-cut double-arc gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 Termination date: 20190408 |