CN1090024A - Epicyclic variable-speed gear with less difference of number of teeth - Google Patents
Epicyclic variable-speed gear with less difference of number of teeth Download PDFInfo
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- CN1090024A CN1090024A CN 93112323 CN93112323A CN1090024A CN 1090024 A CN1090024 A CN 1090024A CN 93112323 CN93112323 CN 93112323 CN 93112323 A CN93112323 A CN 93112323A CN 1090024 A CN1090024 A CN 1090024A
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Abstract
A kind of epicyclic variable-speed gear with less difference of number of teeth can be finished large speed ratio simultaneously and slow down and the step change dual functions.Profile of tooth can be involute, cycloidal-pin wheel or other profile of tooth.Form by fewer differential teeth planetary row and output mechanism, input shaft, internal gear stop mechanism and brake coupling that the internal gear and the planet wheel of a plurality of different speed ratios can rotate.Simple in structure, compact.Characteristics are that volume is little, speed ratio is big, efficient is high, bearing capacity is big, low cost of manufacture.
Description
The present invention is a kind of mechanical variable speed device that can finish large speed ratio deceleration and step change dual functions simultaneously.By the fewer differential teeth planetary of a plurality of different speed ratios row coaxial line be contained on same output mechanism and the same input shaft and constitute.Each planet row's profile of tooth can be an involute tooth.It also can be the cycloidal-pin wheel tooth.Internal gear among each planet row can rotate relative to frame with planet wheel.Internal gear among the different planet rows of stop.Can obtain different output speeds through the large speed ratio deceleration.
The mechanical variable speed device kind is a lot.It is generally acknowledged state-of-the-art is epicyclic variable-speed gear, existing various epicyclic variable-speed gears, and its common feature is: interior engagement-outer gearing transmission that the structure that each planet row adopts all is made up of internal gear-planet wheel-planet carrier-sun gear.Each row's the mutual suit of internal gear, planet carrier, sun gear, power circuit is interted mutually between each planet row, and structure is very complicated, and the part number is a lot.
Its major defect is: 1. manufacture difficulty height, cost height.2. can not realize in step change that large speed ratio slows down, can only realize less reduction speed ratio, general speed ratio is less than 9.
Few tooth difference class type speed reducer of progressively being used widely at present mainly contains involute less tooth difference retarder and cycloidal-pin wheel retarder two classes, and characteristics are that speed ratio is big, and volume is little, single-stage speed ratio 9～87.Cycloidal-pin wheel retarder wherein also has the transmission efficiency height simultaneously, and bearing capacity is big, the steady noise free that turns round, the characteristics that the life-span is long.
But the planetary driving device of existing few tooth difference type does not possess the function of speed change, need can not be used to the workplace of speed change.
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.
Task of the present invention is finished like this:
At first, the little tooth difference speed reducer that goes to disappear has only a planet row's structure.Adopt a plurality of planets row structure ， And and, internal gear is different with the gear ratio of planetary external gear among each planet row.
Secondly, each planet row coaxial line ground is contained on the same output mechanism with same input shaft on.
Again secondly,, the internal gear and planet wheel of the little tooth difference speed reducer that goes to disappear have only one can rotate relative to frame in these two, the structure that another must be fixed with frame.Adopt each internal gear to be bearing on the frame, the structure that internal gear and planet wheel can rotate relative to frame by bearing.
At last, on frame, be equipped with an internal gear stop mechanism, can be according to need of work, any one internal gear of stop and other internal gear still can rotate relative to frame.
More frequent in order to adapt to some gear ratio, or prime mover can not frequently play the workplace of braking, this speed change gear also is equipped with the brake coupling of an interlock before input shaft, when its work characteristics is clutch, break separates, during clutch separation, the brake engages braking, the output shaft of prime mover links through the input shaft of brake coupling and this speed change gear.
When the needs speed change, pull the operating grip of brake coupling, clutch plate is separated, from the kinetic current cut-out of prime mover, prime mover idle running.Simultaneously, brake piece engages, and the braking of speed change gear input shaft is also with regard to integral stop.At this moment, press a certain stop rod in the internal gear stopper as required.A Dui Ying internal gear is promptly fixed by stop with it.Again the brake coupling operating grip is resetted.Braking plate promptly separates, and clutch-plate engages, and kinetic current is connected, few tooth difference velocity ratio output that speed change gear is promptly arranged according to the planet of stop rod correspondence.
Cooperate repetitive operation with brake coupling, press different internal gear stop rods, the planet row that stop is different can obtain the different output speed that slows down through large speed ratio.
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 main body of fewer differential teeth planetary speed changer, and right half part is a brake coupling, and two parts connect with form of flanges.
The working principle of main body is as follows:
Among Fig. 2,8 is one group of pin, is packed in abreast along circumference on the disk of output shaft 9 right-hand members, and 8 and 9 form the output mechanism of speed changer.
The 1st, input shaft is equipped with eccentric bushing on the axle.
6 is two identical planetary external gears, with engagement in the internal gear 7, forms 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 slow speed turbine stage.The 3rd row's speed ratio of being made up of 4,5 second rows and 2,3 that form reduces successively, becomes 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 is contained 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.
On the top of frame 10, the internal gear stop mechanism of an interlock is equipped with, 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 is locked on the position of depressing by through hole ， And.
The middle part of each internal gear excircle all is processed with tooth, and stop rod is when depressing position, and head just in time embeds in the between cog of excircle.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, and the still rotatable speed changer of other two internal gears 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.
The working principle of brake coupling is as follows:
Connecting wheel 25 is as a whole with input shaft 1 usefulness key joint, has groove on the inner circumference of connecting wheel 25, and clutch is sleeved in this circumference from movable friction plate 24.Simultaneously, also have groove on the excircle of connecting wheel 25, break movable friction plate 27 is sleeved on this excircle.
Ratchet wheel 26 is fixed on the frame 10, and break static friction sheet 28 is sleeved on the inner circumference of ratchet wheel 26.
In this speed changer, this break is arranged on the clutch excircle, and connecting wheel is the two shared structural type compact dimensions, can make the geomery of the minimum ， And of boundary dimension of brake coupling and left side speed changer main body harmonious mutually.
This speed changer 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, the driven hole ring 19 ， And that moves right drives platen 20 by thrust-bearing and moves right.The active of clutch, separate from movable friction plate 23,24, input power is cut off.
Meanwhile, under the promotion of steel ball, hole platen 16 is moved to the left, and compresses the dynamic and static friction plate 27,28 of break, makes connecting wheel 25 brakings, and 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.Simultaneously, under the effect of spring 15, brake piece separates.The kinetic current of prime mover feeds input shaft 1 again, and speed changer is with new velocity ratio work.
In the not too frequent occasion of some shift speed change, epicyclic variable-speed gear with less difference of number of teeth also can be unworthy of preparing dynamic clutch, and power is directly imported from input shaft.
In addition, also can increase or reduce planet row, make the two-speed type, various how fast types such as four fast types according to the needs in the work.
Internal gear stop mechanism in the present embodiment and brake coupling all are that manual mode is direct operated, in actual use, also can change into electricly according to need of work, and hydraulic pressure or mode such as pneumatic are controlled manipulation.
The present invention compares with existing various step speed change devices, and its advantage is that speed ratio is big, volume is little, transmission efficiency is high, bearing capacity Da ， And and simple in structure, compact, is convenient to make, and cost is low.
Claims (2)
1, a kind of epicyclic variable-speed gear with less difference of number of teeth, profile of tooth can be the different fewer differential teeth planetary row's of involute, cycloidal-pin wheel or other profile of tooth stop internal gears, realize speed change output.Can finish large speed ratio simultaneously and slow down and the step change dual functions, form by the brake coupling of a plurality of fewer differential teeth planetary rows, an output mechanism, an input mechanism, an internal gear stop mechanism and an interlock.It is characterized in that:
A, have a plurality of fewer differential teeth planetaries rows that coaxial line is arranged, every row forms by a center internal gear and with one of its engagement or two planetary external gears, and the center internal gear among every row is different with the gear ratio of planetary external gear composition.
B, have an output mechanism and an input shaft, row is shared by each planet.When coming work, each planet, do not have the transmission of power between each planet row all directly from input shaft input speed and power circuit ， And and directly from output mechanism output.
Center internal gear among c, each planet row all is to be bearing on the frame by bearing, and internal gear can rotate relative to frame with planet wheel.
D, has an internal gear stop mechanism.The relative frame stop of some internal gears is fixed, and its other internal gear still all turns, can control by manual, electric, hydraulic pressure or mode such as pneumatic.
2, epicyclic variable-speed gear with less difference of number of teeth as claimed in claim 1 is characterized in that:
The brake coupling of an interlock is housed before input shaft, and power enters the input shaft axle through brake coupling.Braking plate separates when declutching, clutch, and power enters speed change gear, speed change gear running work.During the braking plate engage brake, clutch separation, the input power cut, shift speed change is carried out in the speed change gear braking.
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 true CN1090024A (en) | 1994-07-27 |
| CN1030477C 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) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996775A (en) * | 2012-10-09 | 2013-03-27 | 吴小杰 | Grease lubricated star wheel speed reducer for bearing |
| CN106594203A (en) * | 2016-12-23 | 2017-04-26 | 陕西国力信息技术有限公司 | Three-speed device capable of supplying high speed ratio |
| CN108488335A (en) * | 2018-07-04 | 2018-09-04 | 郑州大学 | A kind of speed changer based on small teeth number difference planet 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 |
| CN110668092A (en) * | 2019-09-11 | 2020-01-10 | 莆田市荔城区聚宝隆厨房设备工程有限公司 | Modular conveying system adopting differential-weight speed change principle |
-
1993
- 1993-01-19 CN CN 93112323 patent/CN1030477C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996775A (en) * | 2012-10-09 | 2013-03-27 | 吴小杰 | Grease lubricated star wheel speed reducer for bearing |
| CN102996775B (en) * | 2012-10-09 | 2016-02-03 | 吴小杰 | Bearing grease lubrication planetary-gear speed reducer |
| CN106594203A (en) * | 2016-12-23 | 2017-04-26 | 陕西国力信息技术有限公司 | Three-speed device capable of supplying high speed ratio |
| CN108488335A (en) * | 2018-07-04 | 2018-09-04 | 郑州大学 | A kind of speed changer based on small teeth number difference planet gear |
| 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 |
| CN110668092A (en) * | 2019-09-11 | 2020-01-10 | 莆田市荔城区聚宝隆厨房设备工程有限公司 | Modular conveying system adopting differential-weight speed change principle |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030477C (en) | 1995-12-06 |
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