CN205118145U - Accurate step down gear mechanism - Google Patents
Accurate step down gear mechanism Download PDFInfo
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- CN205118145U CN205118145U CN201520807964.7U CN201520807964U CN205118145U CN 205118145 U CN205118145 U CN 205118145U CN 201520807964 U CN201520807964 U CN 201520807964U CN 205118145 U CN205118145 U CN 205118145U
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- cycloid
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- casing
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Abstract
The utility model provides an accurate step down gear mechanism for a performance is good, the precision is high step down gear mechanism is provided, characterized by, it includes sun gear, planet wheel, expand tight cover, cycloid axle, cycloid gear, casing, forward swing spool flange and hop out spool flange, preceding, hop out spool flange fixed connection, just preceding, hop out spool flange all rotates and installs in the casing, rotating between forward swing spool flange and the hop out spool flange and installing three cycloid axle, three cycloid axle evenly distributed on same circumference at the epaxial fixed mounting planet wheel of the cycloid that stretches out forward swing spool flange, rotates the installation sun gear, sun gear and planetary gear meshing cooperation in the front on the cycloid shaft flange, arranging the inside epaxial cycloid gear that is equipped with of cycloid of casing in, be equipped with the cycloid bearing between cycloid gear and cycloid axle, the cycloid gear cooperates with the ring gear meshing that is located on the casing. This reduction gears performance is good, the precision is high, does benefit to and popularizes and applies in the industry.
Description
Technical field
The utility model relates to technical field of mechanical transmission, specifically a kind of accurate reduction gearing mechanism.
Background technique
A lot of fields of society all can relate to mechanical reduction transmission, especially industrial robot manufactures field, space flight, military project, medical instruments field etc. due to the restriction of space and environment very harsh to the requirement of driving mechanism, require reduction gearing mechanism should small in volume output torque and velocity ratio are large and require that transmission accuracy is high again.Existing several driving mechanism is as RV speed reducer, cycloidal planetary gear speed reducer, harmonic wave speed reducing machine etc., although be widely used in above-mentioned field, but also exist manufacture processing difficulties, yield rate is low, cost is high, be difficult to massive duplication promotes and transmission accuracy awaits the problems such as further raising, and have impact on the development in above-mentioned field and the further raising of comprehensive technical performance.
RV, cycloidal-pin wheel, harmonic wave three kinds of speed reducers, although structure is had nothing in common with each other, have a common feature, is namely all to utilize the speed difference formed in the wobble gear transmission process of ring gear and few tooth to realize slowing down.Its gear ratio calculation is as follows: velocity ratio=wobble gear number of teeth/(the ring gear number of teeth-wobble gear number of teeth).Can be found out by formula, more close steps is larger for the ring gear number of teeth and wobble gear number of teeth difference, and during same volume, gear, the more velocity ratios of the less number of teeth of ring gear modulus are also larger.This form transmission under master gear modulus, the ring gear number of teeth and wobble gear number of teeth difference can not be less than 8, otherwise tooth top interference can occur.In order to obtain larger velocity ratio and avoid tooth top to interfere, above-mentioned speed reducer have employed two kinds of different measures respectively and realizes: RV and cycloidal planetary gear speed reducer make ring gear into pinwheel, cycloidal gear is made into trochoid parallel curves gear, number of teeth difference the is accomplished minimum number of 1, higher velocity ratio is reached again by suitably increasing the pin number of teeth, but also bring new problem simultaneously, first be that the engagement of interior external tooth is undesirable, the pressure angle formed is too large and peaceful sliding, so just bring two problems: one is easily along with the increase of output torque, rigidity can significantly reduce, two is that small radial machining error will bring larger angle drive error.Next is that pin tooth and the manufacture of trochoid parallel curves Gear Processing are more difficult, and especially highi degree of accuracy processing is more difficult, causes yield rate low production manufacture cost high.Harmonic wave speed reducing machine realizes big speed ratio by reducing the module increase number of teeth, but due to the impact by processing technology and cutter manufacture, its velocity ratio, output torque and machining accuracy are all restricted.
Model utility content
The purpose of this utility model is to provide a kind of accurate reduction gearing mechanism, the reduction gearing mechanism that a kind of performance is good for providing, precision is high.
The technical scheme in the invention for solving the technical problem is: a kind of accurate reduction gearing mechanism, it is characterized in that, it comprises sun gear, planet wheel, expansion sleeve, cycloid axle, cycloidal gear, casing, forward swing spool flange and rear cycloid shaft flange, it is characterized in that, described forward swing spool flange is fixedly connected with rear cycloid shaft flange, and it is front, rear cycloid shaft flange is all held by casing installation shaft and is rotatably installed in casing, three cycloid axles are rotatablely equipped with between described forward swing spool flange and rear cycloid shaft flange, three described cycloid axles are circumferentially uniformly distributed same, the cycloid axle stretching out forward swing spool flange fixedly mounts planet wheel, described forward swing spool flange rotates sun gear is installed, described sun gear and planet wheel engagement fit, the cycloid axle being placed in casing internal is provided with cycloidal gear, between described cycloidal gear and cycloid axle, is provided with cycloid bearing, described cycloidal gear and the ring gear engagement fit be positioned on casing,
When motor is fixed on casing, motor output shaft is connected with sun gear, and described rear cycloid shaft flange is as the output terminal of whole reducing gear;
When motor is fixed on forward swing spool flange, motor output end is connected with sun gear, and described casing is as the output terminal of whole reducing gear.
Further, be connected by screw between described forward swing spool flange and rear cycloid shaft flange.
Further, between described forward swing spool flange and rear cycloid shaft flange, connection pin is also provided with.
Further, between described sun gear and cycloid axle, expansion sleeve is provided with.
Further, described cycloidal gear and ring gear are on the basis of standard module gear, gear ring, tip portion is radially removed 1/8 to 7/8 to obtain respectively.
Further, be respectively equipped with cycloid axle positioning bearing at the two ends of described cycloid axle, described in two, cycloid axle positioning bearing is fixedly connected with rear cycloid shaft flange with forward swing spool flange respectively.
The beneficial effects of the utility model are: the accurate reduction gearing mechanism of the one that the utility model provides, although gear and ring gear decrease the depth of engagement after removing part tooth top, but because this kind of engagement is multiple tooth engagement, as long as select properly can not affect speed reducer intensity, but bring subversive benefit: be first that manufacturing is simple, with general gear, ring gear working machine tool and the cutter just accurate manufacturing cycloidal gear of energy and ring gear; Next is the pressure angle owing to remaining cycloidal gear and ring gear 20 °, and transmission rigidity significantly improves.Can make speed reducer under the same volume in addition, velocity ratio and output torque increase substantially.Be exactly the feature remaining Involutes Gears Transmission completely in addition, the engagement driving between cycloidal gear and ring gear is rolling friction completely, makes speed reducer improve transmission efficiency and can increase the service life.Equally harmonic wave speed reducing machine can be made when same volume and velocity ratio with this mechanism, reduce the amount of deformation of flexbile gear, corresponding add flexbile gear thickness and total number of teeth in engagement thus reduce manufacture difficulty increase output torque and easily improve accuracy of manufacturing.
Accompanying drawing explanation
Fig. 1 is appearance schematic diagram of the present utility model;
Fig. 2 is sectional view of the present utility model;
In figure: 1 sun gear, 2 planet wheels, 3 expansion sleeves, 4 cycloid axles, 5 cycloid bearings, 6 cycloidal gears, 7 casings, 8 forward swing spool flanges, cycloid shaft flange after 9,10 connect pin, 11 screws, 12 casing running in bearingss, 13 cycloid axle positioning bearings.
Embodiment
As shown in Figure 1 to Figure 2, the utility model mainly comprises sun gear 1, planet wheel 2, expansion sleeve 3, cycloid axle 4, cycloid bearing 5, cycloidal gear 6, casing 7, forward swing spool flange 8, rear cycloid shaft flange 9, connects pin 10, screw 11, casing running in bearings 12 and cycloid axle positioning bearing 13, is described in detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1 and Figure 2, casing 7 is main bodys of the present utility model, and casing is overall conglobate hollow structure, and casing is provided with ring gear.Be provided with forward swing spool flange 8 in one end of casing, forward swing spool flange is rotatablely equipped with sun gear 1, around sun gear, be provided with three planet wheels, 2, three planet wheels be circumferentially uniformly distributed same.Planet wheel is fixedly mounted on cycloid axle 4, is provided with expansion sleeve 3 between planet wheel and cycloid axle, planet wheel and cycloid axle synchronous axial system.Cycloid axle positioning bearing 13 is respectively equipped with at the two ends of cycloid axle, the cycloid axle positioning bearing of cycloid axle left end is fixed on forward swing spool flange 8, forward swing spool flange is rotatably installed in casing by casing running in bearings 12, and such cycloid axle can rotate relative to casing.The cycloid axle positioning bearing of cycloid axle right-hand member is fixed on rear cycloid shaft flange 9, rear cycloid shaft flange is fixed on forward swing spool flange by screw 11, and forward and backward cycloid shaft flange is all rotatably installed in casing by casing running in bearings 12, and between forward and backward cycloid shaft flange, be provided with connection pin 10.Cycloid axle is provided with cycloidal gear 6, is provided with cycloid bearing 5 between cycloidal gear and cycloid axle, the ring gear engagement fit of cycloidal gear and casing internal, ring gear and casing are integrally manufactured.
This reducing gear has double reduction mechanism, and the first order is slowed down and is made up of sun gear 1 and planet wheel 2; The second level slow down be cycloidal gear on planet wheel band dynamic cycloid axle along ring gear swing rotary, the cycloidal gear number of teeth will be less than the number of teeth of ring gear.This reducing gear has two kinds of output forms, the first output form: motor is fixed on casing 7, and motor output end is connected with sun gear, and rear cycloid shaft flange is as the output terminal of whole reducing gear; The second output form: motor is fixed on forward swing spool flange, and motor output end is connected with sun gear, casing is as the output terminal of whole reducing gear.
Two kinds of output forms cause velocity ratio to differ 1 due to the relation of its sense of rotation, that is: flange exports and is greater than casing and exports 1 velocity ratio.
Cycloidal gear and ring gear on the basis of standard module gear, gear ring, tip portion are radially removed 1/8 to 7/8 to obtain.Tip portion removes gear that is how many and that avoid tooth top to interfere, ring gear number of teeth minimal difference has following rule: this form transmission under above-mentioned master gear modulus, the ring gear number of teeth and cycloidal gear number of teeth difference can not be less than 8.Number of teeth minimal difference=8-1=7 tooth when removing 1/8; Number of teeth minimal difference=8-2=6 tooth when removing 2/8; Number of teeth minimal difference=8-7=1 tooth when removing 7/8 by that analogy.Designer can decide specifically to remove the number of tooth top according to factors such as speed reducer drive ratio, output torque, gear and gear ring moduluses thus design the speed reducer meeting various different duty requirements.
Although gear and ring gear decrease the depth of engagement after removing part tooth top, but because this kind of engagement is multiple tooth engagement, as long as select properly can not affect speed reducer intensity, but bring subversive benefit: be first that manufacturing is simple, with general gear, ring gear working machine tool and the cutter just accurate manufacturing cycloidal gear of energy and ring gear; Next is the pressure angle owing to remaining cycloidal gear and ring gear 20 °, and transmission rigidity significantly improves.Can make speed reducer under the same volume in addition, velocity ratio and output torque increase substantially.Be exactly the feature remaining Involutes Gears Transmission completely in addition, the engagement driving between cycloidal gear and ring gear is rolling friction completely, makes speed reducer improve transmission efficiency and can increase the service life.Equally harmonic wave speed reducing machine can be made when same volume and velocity ratio with this mechanism, increase gear die numerical value, thus reduce manufacture difficulty and increase output torque and easily improve accuracy of manufacturing.
Claims (6)
1. an accurate reduction gearing mechanism, it is characterized in that, it comprises sun gear, planet wheel, expansion sleeve, cycloid axle, cycloidal gear, casing, forward swing spool flange and rear cycloid shaft flange, it is characterized in that, described forward swing spool flange is fixedly connected with rear cycloid shaft flange, and it is front, rear cycloid shaft flange is all held by casing installation shaft and is rotatably installed in casing, three cycloid axles are rotatablely equipped with between described forward swing spool flange and rear cycloid shaft flange, three described cycloid axles are circumferentially uniformly distributed same, the cycloid axle stretching out forward swing spool flange fixedly mounts planet wheel, described forward swing spool flange rotates sun gear is installed, described sun gear and planet wheel engagement fit, the cycloid axle being placed in casing internal is provided with cycloidal gear, between described cycloidal gear and cycloid axle, is provided with cycloid bearing, described cycloidal gear and the ring gear engagement fit be positioned on casing,
When motor is fixed on casing, motor output shaft is connected with sun gear, and described rear cycloid shaft flange is as the output terminal of whole reducing gear;
When motor is fixed on forward swing spool flange, motor output end is connected with sun gear, and described casing is as the output terminal of whole reducing gear.
2. the accurate reduction gearing mechanism of one according to claim 1, is characterized in that, is connected by screw between described forward swing spool flange and rear cycloid shaft flange.
3. the accurate reduction gearing mechanism of one according to claim 2, is characterized in that, between described forward swing spool flange and rear cycloid shaft flange, be also provided with connection pin.
4. the accurate reduction gearing mechanism of one according to claim 1, is characterized in that, between described sun gear and cycloid axle, be provided with expansion sleeve.
5. the accurate reduction gearing mechanism of one according to claim 1, is characterized in that, described cycloidal gear and ring gear are on the basis of standard module gear, gear ring, tip portion is radially removed 1/8 to 7/8 to obtain respectively.
6. the accurate reduction gearing mechanism of one according to claim 1, is characterized in that, is respectively equipped with cycloid axle positioning bearing at the two ends of described cycloid axle, and described in two, cycloid axle positioning bearing is fixedly connected with rear cycloid shaft flange with forward swing spool flange respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807964.7U CN205118145U (en) | 2015-10-16 | 2015-10-16 | Accurate step down gear mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807964.7U CN205118145U (en) | 2015-10-16 | 2015-10-16 | Accurate step down gear mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205118145U true CN205118145U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520807964.7U Expired - Fee Related CN205118145U (en) | 2015-10-16 | 2015-10-16 | Accurate step down gear mechanism |
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| Country | Link |
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| CN (1) | CN205118145U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134888A (en) * | 2015-10-16 | 2015-12-09 | 宋志安 | Precise reduction transmission mechanism |
| CN107044511A (en) * | 2017-04-26 | 2017-08-15 | 珠海飞马传动机械有限公司 | A kind of robot poor tooth reductor of cycloid |
| US10094437B2 (en) | 2016-12-21 | 2018-10-09 | Otis Elevator Company | Self-braking gear and people conveyor comprising a self-braking gear |
| CN108930763A (en) * | 2018-09-18 | 2018-12-04 | 唐山百川智能机器股份有限公司 | Electromagnetism swing torque generator |
| US10359088B2 (en) | 2016-12-21 | 2019-07-23 | Otis Elevator Company | Self-locking gear and people conveyor comprising a self-locking gear |
| CN108930763B (en) * | 2018-09-18 | 2024-10-01 | 唐山百川智能机器股份有限公司 | Electromagnetic swing torque generator |
-
2015
- 2015-10-16 CN CN201520807964.7U patent/CN205118145U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134888A (en) * | 2015-10-16 | 2015-12-09 | 宋志安 | Precise reduction transmission mechanism |
| CN105134888B (en) * | 2015-10-16 | 2018-02-06 | 宋志安 | A kind of accurate reduction gearing mechanism |
| US10094437B2 (en) | 2016-12-21 | 2018-10-09 | Otis Elevator Company | Self-braking gear and people conveyor comprising a self-braking gear |
| US10359088B2 (en) | 2016-12-21 | 2019-07-23 | Otis Elevator Company | Self-locking gear and people conveyor comprising a self-locking gear |
| CN107044511A (en) * | 2017-04-26 | 2017-08-15 | 珠海飞马传动机械有限公司 | A kind of robot poor tooth reductor of cycloid |
| CN108930763A (en) * | 2018-09-18 | 2018-12-04 | 唐山百川智能机器股份有限公司 | Electromagnetism swing torque generator |
| CN108930763B (en) * | 2018-09-18 | 2024-10-01 | 唐山百川智能机器股份有限公司 | Electromagnetic swing torque generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20191016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |