CN2035021U - Planetary flexible gearing with small tooth number difference - Google Patents
Planetary flexible gearing with small tooth number difference Download PDFInfo
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- CN2035021U CN2035021U CN 88201367 CN88201367U CN2035021U CN 2035021 U CN2035021 U CN 2035021U CN 88201367 CN88201367 CN 88201367 CN 88201367 U CN88201367 U CN 88201367U CN 2035021 U CN2035021 U CN 2035021U
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Abstract
The utility model relates to a flexible gearing with small tooth number difference, which belongs to the mechanical field. The utility model is characterized in that a flexible part (such as a thin wall steel strip ring, a transmission chain and toothed synchronous belts in groove shape) is introduced into a specific planetary transmission structure of the utility model. A rotating planetary wheel and fixed wheels of both sides are engaged with the same flexible part, thus, the number of teeth in engagement and the stability are greatly increased, the efficiency can be increased to 95%, the transmission capability is 1-2 times higher than a normal few teeth difference transmission device, the external form volume is reduced about one second, and the cost is 30% lower than the cost of a normal few teeth difference transmission device. The utility model has the advantages of simple structure, reliability, easy manufacture and convenient maintenance. The utility model can be widely used for every aspect of reduction transmission of larger speed ratio.
Description
The invention belongs to mechanical field.
The characteristics of existing harmonic driving are that total number of teeth in engagement is many, running steadily, bearing capacity is high, gear range is big, efficient is high, part is few, volume is little, in light weight, shortcoming is that difficulty, radiating condition are relatively poor for precision prescribed height, processing.Similarly, also there are these problems in the cycloidal-pin wheel transmission.Though common involute less tooth difference transmission manufacturing is simpler and easy, transmission performance, bearing capacity then all are not so good as the former.In addition, the oscillating tooth pin gear speed reducer that patent (85200606) proposes, its advantage is to have increased transmission capacity on the quite big degree, efficient is higher.But its oscillating tooth number of spare parts is many, requires also quite high with its quality of fit that replaces the spare parts mutually and indexing accuracy.Another patent (86202815) is though planet chain reduction device structure is simpler, and transmission capacity is lower.
The objective of the invention is, with the element that sealing can be out of shape circlewise, for example interior all toothed Steel Thin-Wall bands.Flexible elements such as noiseless toothed chain, bush roller chain or profile of tooth synchronous belt.Be loaded in the specific Gear Planet Transmission structure, form the transmission of novel fewer differential teeth planetary flexible element.Make its efficient height, compact structure reliably, gently little, the bigger and installation and processing of bearing capacity is convenient, cost is lower, be widely used.
Mechanism of the present invention and common few tooth difference transmission are similar substantially, also with harmonic driving similar part are arranged.As accompanying drawing 1, a, 1, b and 1, shown in the c, wherein accompanying drawing 1, and b is an accompanying drawing 1, a and 1, the A-A section of c.Its member is respectively:
1-imports eccentric shaft, 2-planet wheel, 3-counterweight block, 4-flexible element, 5-fast pulley, 6-zero tooth difference internal gear, 7-zero-tooth difference gear, 8-output shaft, 9-body.
Fig. 1, mechanism shown in a, two planetary gears 2 are connected into side by side one and are supported on the input eccentric shaft 1, have counterweight block, the outside respectively to have a fast pulley 5 in parallel and be fixed on the body 9 in the middle of these two planetary gears. The fast pulley center is concentric with input eccentric shaft rotation, and and the centre-to-centre spacing between the planetary gear center namely equal to import the eccentric distance e of eccentric shaft. 4 peripheries that are enclosed within planetary gear and fast pulley of flexible element are because the number of teeth difference of planetary gear and fast pulley is very little. The two meshes with same flexible element respectively. When making the rotation of input eccentric shaft 1, planetary gear is both around the fast pulley central rotation, does rotation around himself center again. This rotation is exported from output shaft by output mechanism.
Fig. 1, the mechanism shown in the c and Fig. 1, the mechanism of a is identical, but only has a planetary gear 2, respectively there is a counterweight block 3 the planetary gear both sides, between two fast pulleys, cross section A-A also with Fig. 1, a is identical, with Fig. 1, b represents.
The output mechanism that the present invention taked is identical with the output mechanism of common few tooth difference.Can be zero tooth differential, also can be the coupling of pin axle type, cross slider type, the disc type of floating or other permission radial displacements.At Fig. 1, a and Fig. 1, among the c, what take is zero tooth differential output mechanism, the angular velocity of planet wheel rotation and torque promote output shaft 8 rotations by zero tooth difference internal gear 6, the zero-tooth difference gear 7 that connects with it.
With regard to transmission principle, the present invention is identical with common few tooth difference transmission, but on structure, because the present invention introduces the planet wheel and the fast pulley of specific flexible element and pairing mutually thereof, then makes on its structural behaviour than common and lacks the transmission of tooth difference many advantages are arranged.
At first, kinology of the present invention and velocity ratio only depend on that the number of teeth of planetary pinion and fast pulley and the two the number of teeth are poor, and it is irrelevant with the eccentric distance e value, can be made into same standard eccentric distance e value at same series product like this, wherein flexible element such as chain, synchronizing jugged belt all are standard piece, and the Steel Thin-Wall band also is not difficult to form the standard series product.Be convenient to form standardization, seriation, generalization mass production especially, these standard piece also are convenient to change and are used.
Its two because number of teeth difference is less, eccentric distance e is generally much smaller than the diameter of planet wheel or fast pulley.The flexible element that is paperwrapped in thus outside this two-wheeled approaches circular very much.The cornerite that is positioned at this two-wheeled meshing zone is also near 180 °.This is equivalent to each and takes turns the number of teeth of participating in simultaneously engagement fully and account for about half of its sum.Than ordinary gear with lack the transmission of tooth difference how a lot of participate in the number of teeth of engagement fully.Reality can reach tens to hundreds of.The Duo number of teeth meshes simultaneously like this, and load is uniformly distributed on the flank of tooth of all engagements gradually.Make accordingly on each tooth that institute's bearing load is inevitable to be reduced greatly, thereby improved its bearing capacity and reliability greatly.Lack tooth difference transmission capacity than similar size common and improve 1-2 doubly, simultaneously, compact structure, size are little, in light weight.When particularly taking the Steel Thin-Wall band, transmission capacity can be near being far more than the harmonic driving that surpasses similar size.Kept advantages such as harmonic driving high efficiency, high power, simplification is relatively produced then in manufacturing, cost is lower.
Its three be the transmission intermediary element owing to introduce flexible element.Tension force is less.The radial force of practical function on bearing is less than of the same type with common few tooth difference transmission of load and harmonic driving, and the elasticity of flexible element itself is born the dynamic load aspect and more is better than gear transmission in addition.
Its four, shape approximation circle in the flexible body of the present invention running.Relative rotation is less than similar common corresponding flexible drive in adjacent two between cog (perhaps for chain, between two adjacent link) work.Impact and noise is also less, the running steady.When particularly flexible element is Steel Thin-Wall band or synchronizing jugged belt.Running is steady, vibrating noise is littler.
The embodiment of the invention is as follows:
Type of belt drive: fewer differential teeth planetary flexible element retarder.
Speed ratio: 120
Transmission power: 4 kilowatts
Input shaft rotating speed: 1440 rev/mins
Output shaft rotating speed: 120 rev/mins
Efficient: about 0.95
The planet wheel number of teeth: 240
External diameter: 145.05 millimeters
Width: 14 millimeters
The fast pulley number of teeth: 242
External diameter: 146.25 millimeters
Width: 13 millimeters
Flexible element pattern: Steel Thin-Wall band
The number of teeth: 246
Profile of tooth: triangle
Tooth depth: 1.2 millimeters
Thickness: (disregarding tooth depth) 1.5 millimeters
Width: 55 millimeters
The number of teeth is poor: 2 teeth are poor
Throw of eccentric: 2 millimeters
Output mechanism pattern: by zero tooth difference coupling output
Boundary dimension: long 220 millimeters, wide 210 millimeters, high 225 millimeters.
Weight: about 30 kilograms
With present embodiment with existing of the same type: the harmonic driving of load, reduction speed ratio and little tooth difference speed reducer are relatively.The overall volume of present embodiment only is equivalent to the 1/2-1/3 of common few tooth difference transmission.Weight then is equivalent to the latter's 1/2.5.Even also be slightly less than common harmonic driving.Transmission efficiency (95%) is than the common high 5%-10% of tooth difference transmission efficiency that lacks.Manufacture cost is corresponding will hang down about 30%.
Present embodiment is along two planet wheels middle cross section such as Fig. 2.The represented part of 1-5 is identical with Fig. 1 .a among the figure, in addition, when flexible element is taked toothed chain, bush roller chain or synchronizing jugged belt, then Dui Ying planet wheel and fast pulley profile of tooth also should be the sprocket wheel or the belt wheel of mutual pairing mutually, other structures are identical, and the bearing capacity of these flexible shape parts is lower than the transmission of taking the Steel Thin-Wall band.But owing to be that standard piece, cost are lower, manufacturing is used more convenient.The general less enginerring works tissue of all being not difficult is produced.
Because the present invention can have multiple pattern flexible element, all having very big flexibility aspect design, the manufacturing, the use, can adapt to various requirement and condition of work, in addition itself above-mentioned series of advantages. With the occasion that can be widely used in than the various transmissions of large speed ratio.
Claims (4)
1, a kind of fewer differential teeth planetary flexible gearing, it is characterized in that on the input eccentric shaft of transmission device two identical planet wheels of supporting side by side, a counterweight block is housed between two planet wheels, two fast pulleys are positioned at the planet wheel outside respectively abreast, and be fixed on the frame, centre distance equals to import the throw of eccentric of eccentric shaft between planet wheel and the fast pulley, and respectively be enclosed within peripheral same flexible element engagement.
2, a kind of fewer differential teeth planetary flexible element transmission device, it is characterized in that importing and only support a planet wheel on the eccentric shaft, respectively there is a counterweight block planet wheel both sides, between two fast pulleys that are arranged in parallel, fast pulley then is fixed on the frame, its center and planet wheel centre distance equal to import the throw of eccentric of eccentric shaft, respectively be enclosed within peripheral same flexible element engagement.
3,, it is characterized in that flexible element in the device is meant any in the following part, that is: according to claim 1,2 described fewer differential teeth planetary flexible element transmission devices
Interior all toothed Steel Thin-Wall bands,
Toothed chain,
Roller chain,
The profile of tooth synchronous belt.
4, according to claim 1,2 described fewer differential teeth planetary flexible element transmission devices, it is characterized in that the planet wheel in the device all has the profile of tooth that is meshed with flexible element in the claim 3 with fast pulley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88201367 CN2035021U (en) | 1988-02-13 | 1988-02-13 | Planetary flexible gearing with small tooth number difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88201367 CN2035021U (en) | 1988-02-13 | 1988-02-13 | Planetary flexible gearing with small tooth number difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2035021U true CN2035021U (en) | 1989-03-29 |
Family
ID=4836590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88201367 Expired - Lifetime CN2035021U (en) | 1988-02-13 | 1988-02-13 | Planetary flexible gearing with small tooth number difference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2035021U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996765A (en) * | 2012-09-11 | 2013-03-27 | 吴小杰 | Bearing grease lubrication SEW-F series speed reducer |
| CN102996775A (en) * | 2012-10-09 | 2013-03-27 | 吴小杰 | Grease lubricated star wheel speed reducer for bearing |
| CN107664182A (en) * | 2017-11-08 | 2018-02-06 | 杨爱东 | A kind of few poor tooth planet band chain reductor |
-
1988
- 1988-02-13 CN CN 88201367 patent/CN2035021U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996765A (en) * | 2012-09-11 | 2013-03-27 | 吴小杰 | Bearing grease lubrication SEW-F series speed reducer |
| CN102996765B (en) * | 2012-09-11 | 2016-02-03 | 吴小杰 | Bearing grease lubrication parallel axes series reduction |
| 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 |
| CN107664182A (en) * | 2017-11-08 | 2018-02-06 | 杨爱东 | A kind of few poor tooth planet band chain reductor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |