CN101865271A - Gear with epicycloid-shaped tooth trace - Google Patents
Gear with epicycloid-shaped tooth trace Download PDFInfo
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- CN101865271A CN101865271A CN 201010175711 CN201010175711A CN101865271A CN 101865271 A CN101865271 A CN 101865271A CN 201010175711 CN201010175711 CN 201010175711 CN 201010175711 A CN201010175711 A CN 201010175711A CN 101865271 A CN101865271 A CN 101865271A
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- gear
- tooth
- cylinder
- gears
- transmission
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Abstract
The invention discloses a gear with an epicycloid-shaped tooth trace, all the intersecting lines of the wheel teeth of the gear with a reference cylinder, a root cylinder and a tip cylinder thereof are prolate epicycloids, and all the intersecting lines of the wheel teeth of a cylindrical gear engaged with the gear with the reference cylinder, the root cylinder and the tip cylinder thereof are also prolate epicycloids. In a central section in the direction of tooth width, both the toothed curves of the gear and the cylindrical gear engaged with the gear are involutes, i.e. in the central section in the direction of tooth width, the engagement of the pair of gears is equivalent to the engagement between traditional involute gears, so that the gear has constant transmission ratio. In other sections parallel to the central section, the tooth profiles of the gear and the mating cylindrical gear mutually correspond in a concavo-convex mode, the synthetic curvature between contact surfaces is small, and the synthetic curvature radius is large, so that the gear has large coincidence degree, stable transmission, high bearing capacity and long service life. The invention has the advantages that the deficiencies of small coincidence degree, large impact vibration and the like in straight gear transmission are overcome, and the axial thrust problem existing in helical gear transmission is solved. The invention is suitable for occasions with high speed, heavy load and high-power transmission and can be used as renewal products of straight gears and helical gears at present.
Description
Technical field
The present invention relates to a kind of gear, specifically a kind of tooth trace is shaped as epicycloidal gear.
Background technique
Gear transmission is to utilize the be meshing with each other mechanical transmission of transferring power and motion of the gear teeth of two gears, it is long that it has constant, the reliable operation of simple in structure, moment velocity ratio, efficient height, life-span, characteristics such as power, speed and the dimensional range of using is big, for example transmitted power can be from very little to hundreds of thousands kilowatt, rotating speed can arrive 100,000 rev/mins, peripheral velocity reaches as high as 300 meter per seconds, and gear diameter can be from several millimeters to more than 20 meters, and the efficient of single-stage driving can reach 0.96～0.99.Therefore in all mechanical transmission, gear transmission is most widely used.
Be applied in the gear in the gear transmission at present, by tooth traces shape branch mainly contains two kinds of straight-tooth, helical teeth.During the spur gear engagement driving, its gear teeth are to enter contact simultaneously or separate simultaneously along the whole facewidth, promptly are to load suddenly and unloading, and transmission stability is relatively poor, easily causes impact, vibration and noise, thus the spur gear transmission only be applicable in, the low speed transmission.Be a kind of engagement process gradually between the gear teeth of helical gear, stressed ascending gradually, descending again on the gear teeth, so the helical gear engagement comparatively steadily, impact and noise is little, contact ratio is big, be used at a high speed, powerful occasion more.But because the existence of helix angle can produce end thrust during the helical gear transmission, with the frictional loss that increases in the transmission device.
Summary of the invention
The present invention is directed to the deficiency that present widely used spur gear and helical gear exist, provide a kind of tooth trace to be shaped as epicycloidal gear.
The technical solution adopted in the present invention is: constitute a kind of tooth trace by the recessed flank of tooth, convex side, tip cylinder and root cylinder and be shaped as epicycloidal gear, the intersection of the gear teeth of this gear and its reference cylinder, root cylinder, tip cylinder is prolate epicycloid.
In the such scheme, the tooth curve of the described gear teeth in the central cross section of facewidth direction is involute.
In the such scheme, the intersection of the gear teeth of the cylindrical gears that is meshed with described gear and himself reference cylinder, root cylinder, tip cylinder also all is a prolate epicycloid, and gear teeth tooth curve in the central cross section of facewidth direction of this pairing cylindrical gears also is an involute.
In the such scheme, the recessed flank of tooth of the gear teeth of described gear, convex side respectively with the pairing cylindrical gears convex side, recessed flank of tooth conjugation.
In the such scheme, in being parallel to other cross sections in described central cross section, described gear is recessed mutual corresponding with the flank profil one protruding of pairing cylindrical gears.
Effect: compare with present widely used straight-tooth, two kinds of gears of helical teeth, characteristics of the present invention are that mesh impact is little, contact ratio is big, axial force is approximately zero, stable drive, bearing capacity height, long service life, be suitable for the occasion of high speed, heavy duty, high-power transmission, can be used as present spur gear and helical gear Updated product.
Description of drawings
Fig. 1 is a stereogram of the present invention;
Fig. 2 is the central cross section of Fig. 1 in facewidth direction;
Fig. 3 is the profile of tooth of Fig. 2 in central cross section;
Fig. 4 is the profile geometry in being parallel to other cross sections of Fig. 2.
Among the figure: 1. the recessed flank of tooth, 2. convex side, 3. recessed flank profil, 4. double wedge exterior feature, 5. involute, the prolate epicycloid of the 11. recessed flank of tooth on root cylinder, the prolate epicycloid of 12. convex sides on root cylinder, 13. tip cylinder, 14. root cylinders, 22. central cross sections.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As Fig. 1, gear of the present invention is made up of convex side, the recessed flank of tooth, root cylinder and tip cylinder, and the intersection of each gear teeth of this gear and its reference cylinder, root cylinder, tip cylinder is prolate epicycloid.
Referring to Fig. 2 and Fig. 3, in the central cross section of facewidth direction, the tooth curve of each gear teeth of the present invention is an involute, and the tooth curve of each gear teeth of the cylindrical gears that is meshed with the present invention also is involute.Promptly in above-mentioned central cross section, both engagements are equivalent to the engagement between traditional involute gear, therefore have constant velocity ratio, and this central authorities cross section can be used as the benchmark that the gear transmission physical dimension is calculated.The convex side of the gear teeth of the present invention, the recessed flank of tooth are respectively with the recessed flank of tooth, the convex side conjugation of matching cylindrical gears.
As shown in Figure 4, in other cross sections that are parallel to Fig. 2 central authorities cross section, the present invention is recessed mutual corresponding with the flank profil one protruding of pairing cylindrical gears, so the synthetic curvature between surface of contact is little, composite curve radius is big, bearing capacity is high, thereby has prolonged the working life of gear and gear drive.
Claims (5)
1. a tooth trace is shaped as epicycloidal gear, form by the recessed flank of tooth (1), convex side (2), tip cylinder (13) and root cylinder (14), it is characterized in that: the recessed flank of tooth (1) of the gear teeth of this gear, convex side (2) are prolate epicycloids with the intersection (11,12) of root cylinder (14) respectively, and this recessed flank of tooth (1), convex side (2) also are prolate epicycloid with the reference cylinder of the gear teeth, the intersection of tip cylinder (13).
2. gear according to claim 1 is characterized in that: the tooth curve of the described gear teeth in the central cross section (22) of facewidth direction is involute (5).
3. gear according to claim 1, it is characterized in that: the intersection of the gear teeth of the cylindrical gears that is meshed with described gear and himself reference cylinder, root cylinder, tip cylinder also all is a prolate epicycloid, and gear teeth tooth curve in the central cross section of facewidth direction of this pairing cylindrical gears also is an involute.
4. gear according to claim 1 is characterized in that: the recessed flank of tooth (1) of the described gear teeth, convex side (2) respectively with the pairing cylindrical gears convex side, recessed flank of tooth conjugation.
5. be shaped as epicycloidal gear according to the described tooth trace of the arbitrary claim of claim 1 to 3, it is characterized in that: in other cross sections that are parallel to described central cross section (22), this gear is recessed mutual corresponding with the flank profil one protruding of pairing cylindrical gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175711 CN101865271A (en) | 2010-05-19 | 2010-05-19 | Gear with epicycloid-shaped tooth trace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175711 CN101865271A (en) | 2010-05-19 | 2010-05-19 | Gear with epicycloid-shaped tooth trace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101865271A true CN101865271A (en) | 2010-10-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010175711 Pending CN101865271A (en) | 2010-05-19 | 2010-05-19 | Gear with epicycloid-shaped tooth trace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101865271A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352971A (en) * | 2012-11-13 | 2013-10-16 | 大连理工大学 | Involute ring surface gear transmission |
| CN105202115A (en) * | 2015-09-11 | 2015-12-30 | 重庆大学 | Multi-point contact cylindrical gear meshing pair based on conjugate curves |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047137A (en) * | 1990-04-13 | 1990-11-21 | 王国础 | Arc cylindrical gear and processing method |
| JPH11118023A (en) * | 1997-10-09 | 1999-04-30 | Heishin Kikai Kogyo Kk | Gear and gear pump |
| CN201133460Y (en) * | 2007-11-09 | 2008-10-15 | 完颜学明 | Arc spiral cylindrical gear and arc teeth bar |
| CN101700588A (en) * | 2009-11-05 | 2010-05-05 | 江苏工业学院 | Processing method for cylindrical gear with epicycloid tooth traces |
-
2010
- 2010-05-19 CN CN 201010175711 patent/CN101865271A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047137A (en) * | 1990-04-13 | 1990-11-21 | 王国础 | Arc cylindrical gear and processing method |
| JPH11118023A (en) * | 1997-10-09 | 1999-04-30 | Heishin Kikai Kogyo Kk | Gear and gear pump |
| CN201133460Y (en) * | 2007-11-09 | 2008-10-15 | 完颜学明 | Arc spiral cylindrical gear and arc teeth bar |
| CN101700588A (en) * | 2009-11-05 | 2010-05-05 | 江苏工业学院 | Processing method for cylindrical gear with epicycloid tooth traces |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352971A (en) * | 2012-11-13 | 2013-10-16 | 大连理工大学 | Involute ring surface gear transmission |
| CN105202115A (en) * | 2015-09-11 | 2015-12-30 | 重庆大学 | Multi-point contact cylindrical gear meshing pair based on conjugate curves |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101020 |