CN1126809A - Speed varying mechanism and its processing method - Google Patents
Speed varying mechanism and its processing method Download PDFInfo
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- CN1126809A CN1126809A CN 95110613 CN95110613A CN1126809A CN 1126809 A CN1126809 A CN 1126809A CN 95110613 CN95110613 CN 95110613 CN 95110613 A CN95110613 A CN 95110613A CN 1126809 A CN1126809 A CN 1126809A
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- gear
- processing method
- overlapping
- flank profil
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Abstract
The present invention belongs to transmission mechanism, and it is a new gear design, that is, a basic eccentric circular gear, whose profile is formed according to the motion path of tangent point to the central line of two wheels when the eccentric gear and meshed gear rotate in certain transmission ratio. Compared with involute gear transmission, the modulus of the said gear may be as great as 3-5 time, the bending bearing capacity may be greater by 1.3-2.5 times at the conditions of same central distance and transmission ratio, and it has small slide rate and good workability.
Description
The present invention relates to a kind of transmission device, particularly relate to a kind of gear shift and processing method thereof that contains the element that is meshing with each other except that involute tooth or cycloid tooth.
In the current transmission device that generally uses, belt transmission is arranged, chain transmission, hydraulic transmission and gear transmission or the like.What its gear-driven gear adopted usually is involute tooth or cycloid tooth, and common accidents such as break of gear tooth, damage often appear in these gear teeth in transmission process, repair very difficult.It is good to process these gear requirement materials, the technological level height.In transmission, the sliding ratio of involute gear changes between 0～∝, generally can only be controlled between 1.5～8 in the practice, and worm geared sliding ratio is then up to 2～10.The single staged transmission ratio of involute gear is generally below 6.3, though the velocity ratio single-stage of worm screw can reach 50, its sliding ratio is big, and efficient is very low.
The object of the present invention is to provide a kind of high bearing capacity, contain the gear shift of the element that is meshing with each other except that involute tooth and cycloid tooth, and the processing method of a kind of gear is provided.
In order to realize the foregoing invention purpose, the technical solution that adopts is to carry out new gear teeth design on the basis of existing gear shift, be that driving gear has adopted basic eccentric gear, the flank profil of this kind gear be according to basic eccentric wheel be engaged the movement locus that is tangential on the point on the two-wheeled center line when gear rotates by a stable drive ratio and form, be meshed with this basic eccentric gear and form the also new gear gear of speed change in addition of conveying rotary motion.Its gear is got 2-24 pairs of engaging gears, every pair of interleaved θ angle, and the number of teeth of gearwheel is more than or equal to 2, and the number of teeth of small gear is more than or equal to 1.
The basic principle of this programme and the track of gear tooth profile, as shown in Figure 1, promptly basic eccentric wheel (wheel B) is stated as follows with the intermeshing principle of basic eccentric gear (wheel A):
The Root radius of wheel A is R, and the center is O
a, the number of teeth is n, and its tip circle radius is R+2e, and the radius of wheel B is r, and throw of eccentric is e, its center of rotation is O
bWhen taking turns B around O
bDuring rotation, its center of circle is around with O
bBeing the center, is that the circumference of radius periodically changes with e, and existing to require the rotating ratio as wheel A and wheel B be 1: during n, two-wheeled is crossing forever and be tangential on O
a, O
bOn line on, promptly when two-wheeled by direction as shown with 1: when the velocity ratio of n rotated, A turned over θ when wheel
1, wheel B must turn over n θ
1(illustrated ∠ B
oO
dB
1); A turns over θ when wheel
2, wheel B must turn over n θ
2, the rest may be inferred by analogy.A shown in the figure
oB
o, A
1B
1, A
2B
2, A
3B
3, A
dB
dDeng each point all is to retouch out by this movement locus.In order to make two-wheeled by 1: its arc length of passing by equated substantially to reduce slip when the n velocity ratio rotated, general desirable R=nr, when being meshing with each other with basic eccentric gear in the eccentric wheel of this ratio manufacturing, its maximum sliding ratio can be less than 1.3, the minimum average B configuration sliding ratio that this value both can have been accomplished less than involute gear, more be significantly smaller than the sliding ratio of cylindrical worm, thereby can obtain transmission efficiency preferably, (the equal positive integer of above-mentioned n) (it is more suitable to get e=r/4～r/6) designs rational processing scheme by above rule can process the basic eccentric gear flank profil of any number of teeth more than 2 teeth accurately, and the envelope curver polar equation of its flank profil is ρ=R+r+e-ecosn θ ± √ e
2Cos
2N θ+r
2-e
2Following formula is ρ=R in the time of θ=θ °, when θ=π/n, ρ=R+2e, both can directly mesh with the basic eccentric gear that same basic eccentric circle and throw of eccentric process by this rule with basic eccentric wheel, basic eccentric gear that again can the various different numbers of teeth is meshing with each other, to obtain different velocity ratios.
Because this basic eccentric gear flank profil is to make according to basic eccentric wheel tangent with it track when rotating, and the instantaneous radius of gyration at eccentric wheel its point of contact when rotating is by cycle alternately change between r+e and r-e, it is cumulative to r-e from r-e that 1/2 circle is wherein arranged, 1/7 circle is pursued by r+e and reduces to r-e in addition, when wheel B active, have only when the instantaneous radius of gyration is cumulative, just to promote to take turns the A rotation, have only more than two pairs can produce continuous transmission for this reason by the overlapping installation of certain intersecting angle.
The processing method of its basic eccentric gear can be divided three kinds.
Method 1: cut into the gear sheet again after adopting integral body to process flank profil, assembling method is overlapping.
(1) stay the mill amount accurately to process cylindrical with a long bar by circle size outside the finished product;
(2) angle θ and the position degree requirement by the assembling that is overlapping processes auxiliary hole, and its hole count is according to the gear sheet number of packages decision of overlapping assembling, and promptly hole count equals assembling gear sheet number of packages, and processes endoporus simultaneously;
Formed to-and-fro motion drives in rotating when (3) rotating by gear ratio with basic eccentric circle wheel hobboing cutter or emery wheel process flank profil with periodic to-and-fro motion, the precision of its flank profil must meet the requirements fully, can root circle during check and the size tolerance requirements of top circle as test basis;
(4) gear sheet thickness in accordance with regulations cuts off, and end face polishes, and guarantees the perpendicularity of end face and endoporus;
(5) each part is all got one of them positioning hole and common endoporus as the positioning hole that is overlapping and installs, and adjacent two θ angles of staggering process the strong groove that each part communicates after the accurate positioning check is errorless again.With the axle threading.
Method 2: whole processing all-in-one-piece way.
Promptly get the material that adheres to specification, process cylindrical earlier, endoporus, keyway, width by every tooth processes middle interval trough again, determine the starting point of a feed then, process the flank profil on the left side, again cutter is moved to a slice tooth on the right by the method for method 1 processing flank profil, and will process starting point and rotate the θ angle and process the right a slice flank profil, this moment, two profiles of tooth were identical, but staggered θ angle, then the rest may be inferred more than three in processing.
Method 3: adopt drawing, assembling method is overlapping.
Earlier make punch die by flank profil, with the drawing of punch die burst, again by method 1 processing technology hole, keyway etc., not staggered earlier fine finishing flank profil, line interlacing is overlapping again is assembled.
Owing to adopted above technical solution, realized the gear that the object of the invention adopts basic eccentric gear to be meshed and to constitute preferably, compare with Involutes Gears Transmission, in centre distance, under the identical condition of velocity ratio, its modulus can be accomplished involute gear 3～5 times, therefore under rapidoprint condition of the same race, its bending bearing capacity can be big 5～12 times, if consider that the raising of contact strength is less, its comprehensive load capacity also can be big 1.3～2.5 times.The single staged transmission ratio of this gear generally can be between 1 one 50 or is optional in larger scope, and the velocity ratio bigger as needs can multistagely be contacted, and has overcome the suitable little unsuitable big or suitable greatly unsuitable little defective of existing other driving mechanism.The flank of tooth sliding ratio of this mechanism is very little, can be controlled between 0～1.3,, improve mechanical efficiency and increase the service life so help reducing friction, abrasion, its single-stage driving efficient can be stabilized in more than 0.98, and its transmission efficiency can not reduce with the increase of velocity ratio.Because this transmission does not have axial force, then do not need to adopt thrust-bearing again.But also it is good to have a technology capability, and less demanding with material, using scope is wide, and the gesture that replaces involute tooth or cycloid tooth transmission is arranged greatly.
Description of drawings:
Fig. 1 is that the basic eccentric gear theory of engagement and flank profil track form schematic representation.
Fig. 2 is the assembling schematic representation (B-B among Fig. 3 cuts open) that is made of gear basic eccentric gear engagement.
Fig. 3 be Fig. 2 overlook (A-A cuts open) schematic representation.
Fig. 4 is 3 pairs of basic eccentric gear mesh schematic representations (B-B among Fig. 5 analyses and observe).
Fig. 5 is A-A sectional view of Fig. 4.
Fig. 6 is basic eccentric gear (greatly) schematic representation (3 auxiliary holes and corresponding 3 keyways are positions of expression 3 plate gears among the figure).
Fig. 7 is the E-E section among Fig. 6.
Fig. 8 is the eccentric wheel schematic representation.
Fig. 9 is the sectional view of Fig. 8.
Figure 10 is basic eccentric gear (little) schematic representation.
Figure 11 is the sectional view of Figure 10.
Figure 12 is the cross-sectional schematic of eccentric shaft bearing sleeve.
Figure 13 is the left view of Figure 12.
Figure 14 is the structural representation of the whole processing of basic eccentric gear.
Figure 15 is the sectional view of Figure 14.
Embodiment 1:
Accompanying drawing has been described one embodiment of the present of invention, processes 3 pairs of basic eccentric gears according to the principle design of Fig. 1, is made into gear as shown in Figure 2 then.I.e. parallel dress high speed shaft 5 and lower velocity shaft 12 on the body 4 of this gear, (this example is monodentate to adorn basic eccentric gear 2 on the high speed shaft, can be multiple tooth), (this routine number of teeth is 6 to adorn basic eccentric gear 3 on the corresponding with it lower velocity shaft, θ is 30 °), the former steamboat, and the latter is a bull wheel, present embodiment is got 3 pairs of engaging gears.Between steamboat and steamboat, clamp packing ring 9, clamp packing ring 13 between bull wheel and the bull wheel.The upper end of high speed shaft (input end) but dress go side lid 6, lower end dress end cap 10; The lower end of lower velocity shaft (output terminal) but dress go side lid 15, upper end dress end cap 11; But all load onto eccentric shaft bearing sleeve 7 at lid two, the go side of high speed shaft, be used to adjust two-wheeled centre distance, dress spacer 8 between bearing and the gear; Dress spacer 14 between bearing on the lower velocity shaft and the gear; Add gear shift cover 1 on the body, promptly become gear of the present invention.
Its basic eccentric gear is made by aforesaid method 1, cuts into the gear sheet again after promptly adopting integral body to process flank profil, and the method that is assembled that is overlapping is made.
Embodiment 2:
Press 5 pairs of basic eccentric gears of principle design processing of Fig. 1, then by structure fabrication gear shown in Figure 2.The basic eccentric gear of present embodiment adopts whole processing all-in-one-piece way to make, and method 2 is described as the aforementioned.The present embodiment small gear number of teeth adopts 2 teeth, and the gearwheel number of teeth adopts 9 teeth.
Embodiment 3:
Press 12 pairs of basic eccentric gears of principle design processing of Fig. 1, then by structure fabrication gear shown in Figure 2, its basic eccentric gear adopts drawing, the assembling that is overlapping, and method 3 is described as described above.
Claims (6)
1, a kind of gear, form by body, case lid, lower velocity shaft and high speed shaft etc., it is characterized in that driving gear has adopted basic eccentric gear, the flank profil of this kind gear be according to basic eccentric wheel be engaged the movement locus that is tangential on the point on the two-wheeled center line when gear rotates by a stable drive ratio and form, its engaging gear between 2-24 pairs, every pair of interleaved θ angle of gear.
2,, it is characterized in that gearwheel number in the driving gear is more than or equal to 2 by the described a kind of gear of claim 1.
3,, it is characterized in that small gear number in the driving gear is more than or equal to 1 by the described a kind of gear of claim 1.
4, the processing method of the described gear of a kind of claim 1, comprise the routine processing of parts such as body, case lid, high speed shaft and lower velocity shaft, the processing method that it is characterized in that basic eccentric gear is to cut into the gear sheet again after adopting integral body to process flank profil, the assembling that is overlapping, that is:
(1) stay the mill amount accurately to process cylindrical with a long bar by circle size outside the finished product;
(2) angle θ and the position degree requirement by the assembling that is overlapping processes auxiliary hole, and its hole count equals overlapping assembling gear sheet number of packages, and processes endoporus simultaneously;
Formed to-and-fro motion drives in rotating when (3) rotating by gear ratio with basic eccentric circle wheel hobboing cutter or emery wheel process flank profil with periodic to-and-fro motion;
(4) gear sheet thickness in accordance with regulations cuts off, and end face polishes, and guarantees the perpendicularity of end face and endoporus;
(5) each part is all got one of them positioning hole and common endoporus as the positioning hole that is overlapping and installs, and adjacent two θ angles of staggering after accurate positioning is errorless, process the strong groove that each part communicates again.
5, by the processing method of the described gear of claim 4, the processing method that it is characterized in that basic eccentric gear is that the selection material processes cylindrical, endoporus earlier, keyway, width by every tooth processes middle interval trough again, determines the starting point of a feed then, processes a flank profil on the left side earlier, again cutter is moved to a slice tooth on the right, and will process starting point and rotate the θ angle, process the flank profil of the right a slice, process the 3rd according to this, 4,5 etc.
6, by the processing method of the described gear of claim 4, the processing method that it is characterized in that basic eccentric gear is to adopt drawing, hands over to arrange overlapping assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110613A CN1051603C (en) | 1995-01-08 | 1995-01-08 | Speed varying mechanism and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110613A CN1051603C (en) | 1995-01-08 | 1995-01-08 | Speed varying mechanism and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1126809A true CN1126809A (en) | 1996-07-17 |
| CN1051603C CN1051603C (en) | 2000-04-19 |
Family
ID=5077980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95110613A Expired - Fee Related CN1051603C (en) | 1995-01-08 | 1995-01-08 | Speed varying mechanism and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1051603C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505163A (en) * | 2011-11-10 | 2012-06-20 | 西安航空动力股份有限公司 | Split eccentric adjustment mechanism for mounting edge |
| CN112392914A (en) * | 2020-12-03 | 2021-02-23 | 福建思普计量检测科技有限公司 | Disc distributed output mechanism with multiple transmission ratios |
| CN113084265A (en) * | 2021-04-19 | 2021-07-09 | 重庆沃菲特泵业有限公司 | Gear grinding device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US652394A (en) * | 1899-11-07 | 1900-06-26 | Albert Lagus | Means for raising or lowering windows. |
| CN2122974U (en) * | 1992-04-28 | 1992-11-25 | 万中宝 | Wave-wheel diven variable-speed mechanism |
-
1995
- 1995-01-08 CN CN95110613A patent/CN1051603C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505163A (en) * | 2011-11-10 | 2012-06-20 | 西安航空动力股份有限公司 | Split eccentric adjustment mechanism for mounting edge |
| CN112392914A (en) * | 2020-12-03 | 2021-02-23 | 福建思普计量检测科技有限公司 | Disc distributed output mechanism with multiple transmission ratios |
| CN113084265A (en) * | 2021-04-19 | 2021-07-09 | 重庆沃菲特泵业有限公司 | Gear grinding device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051603C (en) | 2000-04-19 |
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