CN1030477C - Planetary speed-changing device with less-difference of numler of teeth - Google Patents
Planetary speed-changing device with less-difference of numler of teeth Download PDFInfo
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- CN1030477C CN1030477C CN 93112323 CN93112323A CN1030477C CN 1030477 C CN1030477 C CN 1030477C CN 93112323 CN93112323 CN 93112323 CN 93112323 A CN93112323 A CN 93112323A CN 1030477 C CN1030477 C CN 1030477C
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Abstract
The present invention relates to a planetary speed-transforming apparatus with small teeth difference which has the dual-function of speed reduction with large speed ratio and step speed transformation at the same time. The tooth form can be evolvent, cycloid pin wheel or other tooth forms. The present invention is composed of a plurality of annular gears with different speed ratios, a small teeth difference planet row whose all planet wheels can rotate, an output mechanism, an input shaft, a stopping mechanism for the annular gear and a brake coupling. The present invention has the advantages of simple structure, compact structure, small size, large speed ratio, high efficiency, high capability and low manufacture cost.
Description
The present invention relates to epicyclic variable-speed gear with less difference of number of teeth.Profile of tooth can be involute, cycloidal-pin wheel or other profile of tooth, is a kind of mechanical variable speed device that can finish large speed ratio deceleration and step change dual functions simultaneously.
Epicyclic variable-speed gear with less difference of number of teeth of the prior art (as Chinese patent 87102061.0).Because the formation of its each retaining speed ratio all is to be synthesized into by two few tooth difference rows, between two rows constant angular velocity transfer mechanism must be arranged.So the structure more complicated, row's number of few tooth difference row is more, and cost is higher.Because it is more to participate in the gear engagement logarithm of transferring power during work, so vibration source is more, under the situation of same machining accuracy, noise is bigger, and stationarity is relatively poor.Engagement is simultaneously decreased also bigger.
In addition, because it is used for several few tooth difference row's of speed change planet wheel, be the nest of an integral body, therefore, the size and Orientation of its throw of eccentric can only have one, because the constraint of this structure characteristic.During the design speed changer, each toothrow number, touch the number, number of teeth difference range of choice dwindled with regard to pining down, be not easy to few tooth difference row's of various speed ratio values independent assortment, the Applicable scope of complete machine is also just dwindled, and, the quality of nest is bigger, relatively on one side, be difficult to need to increase bigger equilibrium block from balancing each other, complete machine is complicated, and deadweight strengthens.
Purpose of the present invention is to design a kind of characteristics that the planetary drive with small teeth difference speed ratio is big, volume is little, efficient is high, bearing capacity is big that both had, the epicyclic variable-speed gear with less difference of number of teeth that has the step change function again simultaneously.
Another object of the present invention is to design a kind of said apparatus, and each retaining speed ratio value of this device only depends on some few tooth difference rows, and total row's number of few tooth difference row is less, and the driving gear number is few, and is simple in structure.To reduce cost, reduce noise, improve transmission efficiency.
A further object of the present invention is to design a kind of said apparatus, and the wherein throw of eccentric of each planet wheel and eccentric direction are when value, all be separately independently, so that when forming complete machine, enlarge range of choice, the flexibility when obtaining selecting to the few tooth difference row of various parameters.Also be convenient to balancing each other certainly of each planet wheel.
Task of the present invention is finished like this:
At first, the few tooth difference speed reducer of the pin axle type that goes to disappear has only a few tooth difference row's structure, adopts a plurality of few tooth differences rows' structures, and few tooth difference row's number is identical with the retaining number of speed change gear output speed, between respectively arranging be separate, separate.Promptly be separated from each other between each row's internal gear, also be separated from each other between each row's planet wheel.Every row forms by a center internal gear and with one of its engagement or two planetary external gears, and every row's center internal gear is different with the gear ratio of planetary external gear composition, throw of eccentric is different.
Secondly, the bearing pin of pin axle type output mechanism is lengthened, the length of bearing pin is a bit larger tham planet wheel axial dimension sum among each row.Simultaneously, the input shaft that also lengthens, and be processed into several different eccentric segments, corresponding with the planet wheel among each row respectively.Planet wheel among each row all is contained on the bearing pin of output mechanism by the pin-and-hole string, and simultaneously, each planet wheel also all is contained on the eccentric segment of input shaft correspondence by the bearing hole string.
This pin axle type output mechanism and input shaft run through each few tooth difference row, by each few tooth difference is arranged shared.Each few tooth difference row when taking turns to own work, directly from input shaft input speed and power circuit, and directly from output mechanism output, does not have the transmission of rotating speed and power between each few tooth difference is arranged.
Again secondly, the internal gear and planet wheel of few tooth difference speed reducer of going to disappear has only one can rotate relative to frame in these two, the structure that another can not rotate relative to frame adopts each internal gear to be bearing on the frame by bearing, the structure that internal gear and planet wheel all can rotate relative to frame.
At last, on frame, be equipped with an internal gear arrestment mechanism, can be according to need of work, brake any one internal gear and other internal gear still can rotate relative to frame.
During work, brake certain few tooth difference row's internal gear, this is arranged promptly directly from input shaft input speed and power circuit, directly export by bearing pin after slowing down from output mechanism, at this moment the output speed ratio of whole device promptly is this row's a speed ratio, and each few tooth difference row is irrelevant with other.Other each row's idle running this moment.
The different rows' of braking internal gear can obtain different output speeds.
When using the internal gear arrestment mechanism of different qualities, can obtain the gear shift process of different qualities such as non-power gear shifting, power gear shifting.
Advantage of the present invention
The present invention has outside the characteristics that few tooth difference velocity ratio is big, volume is little, transmission efficiency is high, bearing capacity is big, noise is little, the life-span is long, has the step change function again simultaneously.And gear can adopt various profiles of tooth such as involute, cycloidal-pin wheel.
Compared with prior art, the gear shift mode structure that the present invention uses is more simple, and few tooth difference row's number is less, and the number of driving gear and other pieces obviously reduces, and therefore, the complete machine manufacture cost is lower, and weight and volume is less.
Because when any one kept off speed operation, the few tooth row that participates in transmission rotating speed and power circuit all had only one.Therefore, (1) vibration source reduces, and the complete machine noise reduces, and smoothness of operation and life-span improve.(2) loss of the engagement during transmitted power reduces, and overall efficiency is higher.
Planet wheel among the present invention among each row, its throw of eccentric and eccentric direction all can be according to job requirements, independent value.Therefore, few tooth difference row's that make up (1), string is adorned various different operating requirements accommodation is bigger, more flexible.The accommodation of type is also bigger.(2) centrifugal force of each planet wheel is convenient to save equilibrium block in the device internal balance, further reduces noise and improves stationarity.
Type of the present invention can use separately, also can be used with other device, below is a type of the present invention and the embodiment that brake coupling is used.
Below in conjunction with embodiment's accompanying drawing, the present invention is done detailed description.
Fig. 1 is the outline drawing of three fast type fewer differential teeth planetary speed changers of a band brake clutch and motor.
Fig. 2 is its structure diagram, and wherein internal gear is a pinwheel, and planetary external gear is a cycloid wheel.
In the drawings, left-half is the fewer differential teeth planetary speed changer, and right half part is a brake coupling.Two parts connect with form of flanges.
The working principle of few tooth difference speed changer part is as follows:
Among Fig. 2,8 is one group of pin.Be packed in abreast along circumference on the disk of output shaft 9 right-hand members, 8 and 9 form the output mechanism of speed changer.
1. be input shaft, on the axle eccentric bushing be housed.
6 is two identical planetary external gears.With engagement in the internal gear 7, form a fewer differential teeth planetary row.Similarly, two planetary external gears 4 are formed second fewer differential teeth planetary row with internal gear 5.Two planetary external gears 2 are formed the 3rd fewer differential teeth planetary row with internal gear 3.Few tooth difference velocity ratio of these three planet rows has nothing in common with each other.In the present embodiment, by 6,7 first row's speed ratio maximums of forming.Become low speed paper.The 3rd row's speed ratio of being made up of 4,5 second rows and 2,3 that form reduces successively.Become middling speed level and high speed level respectively.
Among three planet rows, on the core wheel position of each planet wheel, all have central shaft hole, the central shaft hole of planet wheel is contained on the input shaft 1 by bearing and eccentric bushing string.
On the spoke of each planet wheel, all have column pin hole.Planet wheel during three planets are arranged.All be contained in living on the pin of output mechanism by the column pin hole string.
Each planet row directly from output mechanism output, does not have the transmission of power directly from input shaft input speed and power circuit between each planet row after deceleration.
Between the excircle and frame 10 of three internal gears 7,5,3, rolling element is housed all.Internal gear can rotate relative to frame.
The internal gear stop mechanism of an interlock is equipped with on the top of frame 10.By interlock pin 11, low speed stop rod 12, middling speed stop rod 13,4 springs among high speed stop rod 14 and Fig. 2 are formed.
Have three through holes on the interlock pin 11.Three stop rods point to the excircle of three internal gears respectively by these three holes.Three stop rods all are processed with the inclined-plane in the part that contacts with through hole, and shoulder block is arranged at the top on inclined-plane.
When pressing low speed stop rod 12, the bar ramp passes through through hole, and is locked on the position of depressing.
The middle part of each internal gear excircle all is processed with tooth.Stop rod is when depressing position, and head just in time embeds in the between cog of excircle, and internal gear 7 is fixed by stop.
At this moment, other two internal gears still can rotate relative to frame, and this speed changer is exported with the slow speed turbine stage velocity ratio.
When pressing middling speed stop rod 13, stop rod 13 will be locked on the position of depressing, and low speed stop rod 12 automatically resets simultaneously.At this moment, internal gear 5 is by stop.Other two internal gears are still rotatable, and speed changer is exported with the middling speed stage gear ratio.
In like manner, when pressing high speed level stop rod 14, export with the high speed stage gear ratio.
Working principle when cooperating with brake coupling is as follows:
In brake coupling, axle sleeve 22 is sleeved on the motor shaft, is coupled as one.Have groove on the excircle of axle sleeve, clutch active friction plate 23 is sleeved on the axle sleeve, and can move axially.
Connecting wheel 25 is as a whole with input shaft 1 usefulness key joint.Have groove on the inner circumference of connecting wheel 25, clutch is sleeved in this circumference from movable friction plate 24, simultaneously, also has groove on the excircle of connecting wheel 25, and break movable friction plate 27 is sleeved on this excircle.
The speed changer complete machine is when transferring power, and handle 18 is in original position.Platen 20 is moved to the left under the effect of spring 21, with clutch active friction plate 23 with compress from movable friction plate 24, via axle sleeve 22, initiatively from movable friction plate 23,24, land 25 drives driving shaft 1 and rotates from the power of motor.At this moment, because the effect of spring 15, the hole platen 16 of break is close proximity to right positions, and the dynamic and static friction plate 27,28 of break is in separated state, and break is inoperative.
When the needs gear shift, pull handle 18, initiatively the hole ring makes circumferentially to rotate (seeing that K-K analyses and observe among Fig. 2).Under the promotion of steel ball, driven hole ring 19 moves right, and drives platen 20 by thrust-bearing and move right, and the active of clutch, separates from movable friction plate 23,24, and input power is cut off.
Meanwhile, under the promotion of steel ball, hole platen 16 is moved to the left.Compress the dynamic and static laminate patch 27,28 of rubbing of break, make connecting wheel 25 brakings.Speed changer is also with regard to integral stop.Can press the internal gear stop rod this moment, carries out gear shift.
After the gearshift, with the handle pushed home.Under the effect of spring 21, clutch plate engages, and simultaneously, under the effect of spring 15, brake piece separates.The kinetic current of prime mover feeds output shaft 1 again, and speed changer is with new velocity ratio work.
Claims (1)
1, a kind of epicyclic variable-speed gear with less difference of number of teeth, form by a plurality of independently fewer differential teeth planetary rows, shared pin axle type output mechanism and an input shaft, an internal gear arrestment mechanism that runs through each few tooth difference row, brake different fewer differential teeth planetary rows' internal gear, realize the speed change output of multiple large speed ratio, profile of tooth can be involute, cycloidal-pin wheel or other profile of tooth.
It is characterized in that:
A. have a plurality of independently fewer differential teeth planetary rows that coaxial line is arranged, few tooth difference row's number is identical with the retaining number of speed change gear output speed, between each row is separated, every row forms by a center internal gear and with one of its engagement or two planetary external gears, every row's center internal gear is different with the gear ratio that planetary external gear is formed, the throw of eccentric difference.
B. has a pin axle type output mechanism and an input shaft that runs through each few tooth difference row, by each few tooth difference is arranged shared.The bearing pin length of output mechanism is a bit larger tham planet wheel axial dimension sum among each row, and several different eccentric segments are arranged on the input shaft, and is corresponding with the planet wheel among each row respectively.Planet wheel among each row all is contained on the bearing pin of output mechanism by the pin-and-hole string, and simultaneously, each planet wheel also all is contained on the corresponding eccentric segment of input shaft by the bearing hole string.When coming work, each planet, and, do not have the transmission of rotating speed and power between each few tooth difference row directly from output mechanism output all directly from input shaft input speed and power circuit.
C. the center internal gear among each planet row all is to be bearing on the frame by bearing, and internal gear all can rotate relative to frame with planet wheel.
D. have an internal gear arrestment mechanism, can make the relative frame braking of some internal gears fixing, but and still all transmissions of other internal gear.Can control by manual, electric, hydraulic pressure or mode such as pneumatic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112323 CN1030477C (en) | 1993-01-19 | 1993-01-19 | Planetary speed-changing device with less-difference of numler of teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112323 CN1030477C (en) | 1993-01-19 | 1993-01-19 | Planetary speed-changing device with less-difference of numler of teeth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1090024A CN1090024A (en) | 1994-07-27 |
| CN1030477C true CN1030477C (en) | 1995-12-06 |
Family
ID=4989944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112323 Expired - Fee Related CN1030477C (en) | 1993-01-19 | 1993-01-19 | Planetary speed-changing device with less-difference of numler of teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030477C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996775B (en) * | 2012-10-09 | 2016-02-03 | 吴小杰 | Bearing grease lubrication planetary-gear speed reducer |
| CN106594203B (en) * | 2016-12-23 | 2023-03-14 | 陕西国力信息技术有限公司 | Three-speed device capable of providing large speed ratio |
| CN108488335B (en) * | 2018-07-04 | 2020-01-31 | 郑州大学 | speed variator based on small tooth difference planetary gear |
| CN109780149A (en) * | 2019-03-13 | 2019-05-21 | 吉林大学 | A kind of speed change gear based on small teeth number difference planet gear |
| CN110668092B (en) * | 2019-09-11 | 2021-06-04 | 南通联源机电科技股份有限公司 | Modular conveying system adopting differential-weight speed change principle |
-
1993
- 1993-01-19 CN CN 93112323 patent/CN1030477C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1090024A (en) | 1994-07-27 |
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