CN201187561Y - Real time return difference-free transmission two-stage precision steel ball planetary reducer - Google Patents
Real time return difference-free transmission two-stage precision steel ball planetary reducer Download PDFInfo
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- CN201187561Y CN201187561Y CNU2008200769907U CN200820076990U CN201187561Y CN 201187561 Y CN201187561 Y CN 201187561Y CN U2008200769907 U CNU2008200769907 U CN U2008200769907U CN 200820076990 U CN200820076990 U CN 200820076990U CN 201187561 Y CN201187561 Y CN 201187561Y
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- steel ball
- planetary plate
- disc
- enclosed slot
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Abstract
The utility model discloses a real-time non-return difference transmission two-stage precise steel ball planetary speed reducer which belongs to the field of a mechanical driving speed reducer. The speed reducer comprises an input eccentric shaft (1), a central disc (2) with a cycloid enclosed slot on the end surface, a combined type planetary disc, an output disc (shaft) (8) with a cycloid enclosed slot on the end surface, and a stander (9), wherein, the combined type planetary disc is composed of a planetary disc (4) with a cycloid enclosed slot on the end surface, a butterfly shaped spring (5), a pin (6) and a planetary disc (4') with a cycloid enclosed slot on the end surface. The butterfly shaped spring (5) is arranged between the first planetary disc 4 and the second planetary disc 4' and is connected with the first planetary disc 4 and the second planetary disc 4' through the pin (6), only relative axial movement is allowed between the first planetary disc 4 and the second planetary disc 4', and the relative rotation is not allowed between the first planetary disc 4 and the second planetary disc 4'. The combined type planetary disc is installed at the eccentric part of the input eccentric shaft (1). The two-stage precise steel ball planetary speed reducer solves the problems that because the gapless steel ball meshing pair of the precise steel ball planetary speed reducer generates gaps due to abrasion to cause the speed reducer to produce transmission return difference, and the meshing and the rolling are generated, even the speed reducer is locked due to the thermal expansion of the meshing pair, thereby realizing the real-time non-return difference transmission of the speed reducer.
Description
Technical field
The utility model relates to a kind of mechanical transmission retarder field, particularly relates to a kind of return difference transmission secondary precision steel ball planetary reducer that do not have constantly.
Background technique
At present, precision steel ball planetary reducer adopts spiral as the gap adjusting mechanism (see figure 3), rely on the artificial steel ball engagement pair gap of regularly adjusting, this adjustment is not carried out constantly, and require operator to have rich practice experience, both expend time and manpower, can not keep the optimum Working that precision steel ball planetary reducer is in does not all the time have the return difference transmission constantly again.Find at present the public technology document that can address these problems as yet.
Though precision steel ball planetary reducer steel ball engagement pair structure itself has tight mesh and no return difference transport characteristics, but it the gap must occur after the engagement pair service wear, thereby cause retarder the transmission return difference to occur, had a strong impact on transmission accuracy, obviously can reduce working life again.
On the other hand, precision steel ball planetary reducer is under the condition that runs up, zero-clearance steel ball engagement pair can raise and the generation thermal distortion by Yin Wendu, this thermal distortion produces backing even stuck phenomenon when making engagement pair work, cause the distortion of retarder output movement, efficient to reduce even can not rotation work, damage retarder.
Japan is the world advanced country of precision drive machinery, but the similar steel ball reducer of its development is still controlled the return difference precision in " regularly artificial " adjusting gap by gap adjusting mechanism at present by rule of thumb, therefore, the manual tune amount is excessive, to bring the engagement pair wearing and tearing to strengthen, transmission efficiency reduces, even the stuck consequence of engagement pair; And the manual tune quantity not sufficient, then will there be the gap in engagement pair and the transmission return difference occur.Therefore, the most of transmission duration of work before " regularly artificial " regulated, obviously there is the transmission return difference in retarder.And raise and the generation thermal distortion for engagement pair surface Yin Wendu, producing backing even stuck phenomenon when causing engagement pair work, existing similar retarder can not solve and avoid.
Summary of the invention
In order to adjust existing problem and shortage in the steel ball engagement pair gap that solves above-mentioned existing precision steel ball planetary reducer, the utility model provides a kind of return difference transmission secondary precision steel ball planetary reducer that do not have constantly, this retarder not only can guarantee the tight mesh of steel ball engagement pair, and can also guarantee steel ball engagement pair automatic tight mesh constantly, thereby guarantee this retarder do not have the return difference transmission constantly.
The technological scheme that its technical problem that solves the utility model adopts is: described do not have return difference transmission secondary precision steel ball planetary reducer constantly and comprise that eccentric input shaft 1, end face are processed with spider 2, the first steel ball group 3, the second steel ball group 7, output disc 8 and the frame 9 of cycloid enclosed slot, is characterized in that: first planetary plate 4, butterfly spring 5, the end face that the combined type planetary plate is processed with the cycloid enclosed slot by end face is processed with second planetary plate 4 of cycloid enclosed slot
/Form with bearing pin 6, the end face of described output disc 8 is processed with the cycloid enclosed slot; Belleville spring 5 is contained in first planetary plate 4 and second planetary plate 4
/Between, first planetary plate 4 and second planetary plate 4
/Connect by 2～4 bearing pins 6, the combined type planetary plate is installed in the eccentric part of eccentric input shaft 1.First planetary plate 4 and second planetary plate 4
/Between can move to axial, but can not relatively rotate, the elastic force control that moves axially by belleville spring 5 that it is relative realizes, and guarantees that steel ball is always 4 contacts in the engagement pair; First planetary plate 4 and second planetary plate 4
/Between axially " separately move " (be between the engagement pair member axially near moving) and can eliminate the engagement pair gap and keep 4 contacts of engagement pair steel ball, and first planetary plate 4 and second planetary plate 4
/Between axially " near moving " (being axially separately moving between the engagement pair member) can compensate the axial clearance that the steel ball engagement pair needs because of the thermal expansion distortion, avoid the backing and the stuck phenomenon of engagement pair, this " separately moving " and " near moving " is constantly and carries out automatically, therefore the combined type planetary plate can be realized the tight mesh automatically constantly of steel ball engagement pair, thus realize this retarder do not have the return difference transmission constantly automatically.
In not having return difference transmission secondary precision steel ball planetary reducer constantly, the cycloid enclosed slot of the cycloid enclosed slot of first planetary plate 4 of combined type planetary plate, the first steel ball group 3 and spider 2 constitutes first order gearing down engagement pair; And second planetary plate 4
/The cycloid enclosed slot of cycloid enclosed slot, the second steel ball group 7 and output disc 8 constitute second level gearing down engagement pair, thereby realize the secondary planet gearing down of this retarder.
The beneficial effects of the utility model are: steel ball engagement pair gap can be automatically adjusted in this invention constantly, and that realizes retarder does not have the return difference transmission constantly, and reliable operation has greatly improved the transmission precision and the reciprocating accuracy of precision mechanical transmission mechanism; Steel ball is almost pure rolling in the engagement pair, improved retarder transmission efficiency, prolonged working life; This retarder has removed traditional artificial spiral regulating mechanism of adjusting play regularly, can save the time and the manpower in manual tune gap, has improved productivity.This retarder has also removed the constant speed output mechanism that traditional Gear Planet Transmission uses (be so-called W mechanism), and structural volume is little, and its velocity ratio is increased, and is easy to the microminiaturization of retarder.
Description of drawings
Fig. 1 does not have return difference transmission secondary precision steel ball planetary reducer structure diagram constantly;
Fig. 2 is a combined type planetary plate structure diagram;
Fig. 3 is the common precision steel ball planetary reducer structure diagram in artificial periodic adjustment gap.
In above-mentioned accompanying drawing, 1. eccentric input shaft, 2. spider, the 3. first steel ball group, 4. first planetary plate, 5. belleville spring, 4
/. second planetary plate, 6. bearing pin, the 7. second steel ball group, 8. output disc (axle), 9. frame, 10. clearance adjustment mechanism, 11. planetary plates.
Embodiment
Embodiment
Fig. 1 is that the utility model is disclosed does not have return difference transmission secondary precision steel ball planetary reducer constantly, the eccentric part of the eccentric input shaft 1 of described retarder is installed the combined type planetary plate, the left side of first planetary plate 4 of combined type planetary plate is processed with the cycloid enclosed slot, second planetary plate 4 of combined type planetary plate
/The right side be processed with the cycloid enclosed slot, end face is processed with the spider 2 of cycloid enclosed slot by first planetary plate 4 engagements of the first steel ball group 3 with the combined type planetary plate; End face has the output disc 8 of cycloid enclosed slot by second planetary plate 4 of the second steel ball group 7 with the combined type planetary plate
/The engagement (see figure 2), belleville spring 5 is contained in first planetary plate 4 and second planetary plate 4
/Between and be in the pretension state; First planetary plate 4 and second planetary plate 4
/Connect by 3 bearing pins 6, and guarantee first planetary plate 4 and second planetary plate 4
/Between only allow to relatively move and do not allow to relatively rotate by setting-up eccentricity input shaft 1 in the bearing of the center hole of spider 2 and output disc 8, in the hole of frame 9, spider 2 is used Bolt Connection with frame 9 to output disc 8 by Bearing Installation.
Working principle of the present utility model is: when eccentric input shaft 1 rotates, eccentric shaft on it is made revolution motion by the box-like planetary plate of bearing driving group, cycloid enclosed slot on first planetary plate, 4 left sides promotes steel ball 3 motions, be subjected to the constraint of cycloid enclosed slot on spider 2 right sides, the steel ball 3 anti-combined type planetary plates that push away force its spinning motion, realize the one-level retarded motion of retarder.When the combined type planetary plate is done planetary motion, and on the basis of one-level retarded motion, second planetary plate 4
/Cycloid enclosed slot on the right side promotes steel ball 7 motions, by the cycloid enclosed slot on output disc (axle) 8 left sides, makes output disc (axle) 8 do retarded motion again, realizes the double reduction transmission of retarder.
Not having return difference transmission secondary accurate steel balls retarder constantly, to realize not having constantly the process of return difference transmission as follows:
At first, according to the designing requirement of not having return difference transmission precision steel ball retarder constantly, in the combined type planetary plate, first planetary plate 4 is designed to the planetary plate of end face band cycloid enclosed slot, with second planetary plate 4
/Also be designed to end face and have planetary plate, first planetary plate 4 and second planetary plate 4 of cycloid enclosed slot
/Connect with bearing pin 6, belleville spring 5 places between two planetary plates and is in the pretension state.The pretightening force of belleville spring 5 is by first planetary plate 4 and second planetary plate 4
/4 contacts that make two groups of steel ball engagement pair all keep no sideshake constantly, the pretightening force of butterfly spring 5 can not have the requirement condition of sideshake and by theoretical analysis and calculation and test acquisition according to engagement pair.
In not having return difference transmission secondary precision steel ball planetary reducer working procedure constantly, former thereby when producing the gap because of wearing and tearing etc. when the steel ball engagement pair, belleville spring 5 will automatically spring open, and make first planetary plate 4 and second planetary plate 4
/Between produce the axial displacement separate relatively, eliminate the gap that the steel ball engagement pair produces, guarantee two groups of steel ball engagement pair tight mesh of 4 contacts constantly, this tight mesh of 4 contacts constantly of engagement pair, that guarantees the forward and reverse rotation work of this retarder does not have the return difference transmission constantly automatically.
On the other hand, in this retarder ran up work, when each member generation thermal expansion of engagement pair distortion caused engagement pair backing even phenomenon such as stuck, this thermal expansion distortion must make first planetary plate 4 and second planetary plate 4
/Between produce approaching relatively axial displacement, this moment, belleville spring 5 was further compressed, thereby compensate the steel ball engagement pair automatically because of the axial clearance that thermal distortion need increase, make the steel ball engagement pair keep the no sideshake engagement of 4 contacts constantly automatically, and then realize not having constantly the return difference transmission.
Therefore, this precision steel ball planetary reducer can be regulated steel ball engagement pair gap constantly automatically under the effect of combined type planetary plate, and what make that it keeps forward and reverse motion does not have sideshake engagement constantly, thus realize this retarder do not have the return difference transmission constantly automatically.
Real time return difference-free transmission two-stage precision steel ball planetary reducer need not the manual adjustment operation, has Transmission is accurate, transmission efficiency is high, gearratio is big, little microminiaturization and the long service life of being easy to of structural volume Etc. advantage.
Claims (2)
1. one kind is not had return difference transmission secondary precision steel ball planetary reducer constantly, comprise eccentric input shaft (1), end face is processed with the spider (2) of cycloid enclosed slot, the first steel ball group (3), the second steel ball group (7), output disc (8) and frame (9), it is characterized in that: the combined type planetary plate is processed with first planetary plate (4) of cycloid enclosed slot by end face, butterfly spring (5), end face is processed with second planetary plate (4 ') and the bearing pin (6) of cycloid enclosed slot and forms, belleville spring (5) be contained in first planetary plate 4 and second planetary plate 4 ' between, first planetary plate 4 and second planetary plate 4 ' connect by 2～4 bearing pins 6, the end face of output disc (8) is processed with the cycloid enclosed slot, and the combined type planetary plate is installed in the eccentric part of eccentric input shaft (1).
2. according to claim 1 do not have return difference transmission secondary precision steel ball planetary reducer constantly, it is characterized in that: the cycloid enclosed slot of the cycloid enclosed slot of first planetary plate (4) end face, the first steel ball group (3) and spider (2) end face constitutes first order gearing down engagement pair in the combined type planetary plate; The cycloid enclosed slot of the cycloid enclosed slot of second astrolabe (4 ') end face, the second steel ball group (7) and output disc (8) end face constitutes second level gearing down engagement pair in the combined type planetary plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200769907U CN201187561Y (en) | 2008-04-10 | 2008-04-10 | Real time return difference-free transmission two-stage precision steel ball planetary reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200769907U CN201187561Y (en) | 2008-04-10 | 2008-04-10 | Real time return difference-free transmission two-stage precision steel ball planetary reducer |
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| CN201187561Y true CN201187561Y (en) | 2009-01-28 |
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| CNU2008200769907U Expired - Fee Related CN201187561Y (en) | 2008-04-10 | 2008-04-10 | Real time return difference-free transmission two-stage precision steel ball planetary reducer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839328A (en) * | 2009-03-16 | 2010-09-22 | 住友重机械工业株式会社 | The making method of speed reducer and speed reducer |
| CN101871530A (en) * | 2010-06-25 | 2010-10-27 | 无锡市闽仙汽车电器有限公司 | Countershaft transmission gap adjusting structure |
| CN101956799A (en) * | 2010-09-14 | 2011-01-26 | 江苏大学 | Cycloidal steel ball type inertial mass accumulator |
| CN103644267A (en) * | 2013-12-05 | 2014-03-19 | 燕山大学 | Universal reducer with tooth-shifting steel balls |
| US10190666B2 (en) | 2014-06-24 | 2019-01-29 | Musashi Seimitsu Industry Co., Ltd. | Differential device |
| CN110513443A (en) * | 2019-08-16 | 2019-11-29 | 燕山大学 | Eccentric drive twin-stage plane movable teeth reducer |
-
2008
- 2008-04-10 CN CNU2008200769907U patent/CN201187561Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839328A (en) * | 2009-03-16 | 2010-09-22 | 住友重机械工业株式会社 | The making method of speed reducer and speed reducer |
| CN101839328B (en) * | 2009-03-16 | 2013-05-01 | 住友重机械工业株式会社 | Speed reducer and manufacturing method thereof |
| CN101871530A (en) * | 2010-06-25 | 2010-10-27 | 无锡市闽仙汽车电器有限公司 | Countershaft transmission gap adjusting structure |
| CN101956799A (en) * | 2010-09-14 | 2011-01-26 | 江苏大学 | Cycloidal steel ball type inertial mass accumulator |
| CN101956799B (en) * | 2010-09-14 | 2012-11-07 | 江苏大学 | Cycloidal steel ball type inertial mass accumulator |
| CN103644267A (en) * | 2013-12-05 | 2014-03-19 | 燕山大学 | Universal reducer with tooth-shifting steel balls |
| US10190666B2 (en) | 2014-06-24 | 2019-01-29 | Musashi Seimitsu Industry Co., Ltd. | Differential device |
| CN110513443A (en) * | 2019-08-16 | 2019-11-29 | 燕山大学 | Eccentric drive twin-stage plane movable teeth reducer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 |