CN1480668A - Planetary gear - Google Patents
Planetary gear Download PDFInfo
- Publication number
- CN1480668A CN1480668A CNA021416095A CN02141609A CN1480668A CN 1480668 A CN1480668 A CN 1480668A CN A021416095 A CNA021416095 A CN A021416095A CN 02141609 A CN02141609 A CN 02141609A CN 1480668 A CN1480668 A CN 1480668A
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- Prior art keywords
- ring gear
- gear
- half parts
- planetary pinion
- planetary
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- 230000005540 biological transmission Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/2809—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels
- F16H1/2818—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels by allowing limited movement of the ring gear relative to the casing or shaft
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention relates to a planetary gear having a planet carrier which can be rotated about an axis of rotation, at least one planet wheel which is arranged on the planet carrier, a sun wheel and a ring wheel, wherein the planet wheel is arranged so as to be movable at least radially relative to the axis of rotation of the planet carrier. In order to reduce the play of this type of planetary gear, a ring gear is also provided, which is divided into two parts on a plane perpendicular to the axis of rotation of the planet carrier, and the two halves of the ring gear can be rotated towards each other, so that a radial offset of the planet wheels in the direction of approach to the sun wheel is produced, in order to reduce the play.
Description
Technical field
The present invention relates to a kind of planetary pinion, it has planetary carrier, can rotate around rotatingshaft, at least one planet wheel, be arranged on the planetary carrier, a central gear (sun wheel) and a ring gear, and planet wheel is arranged to can move radially with respect to the rotatingshaft of planetary carrier at least.
Background technique
Such planetary pinion has been disclosed in DE 195 46 586 and EP 0 779 449.This moved radially ability with respect to the planetary carrier planet wheel, influencing the known planetary life-span increases greatly, and it causes a fact significantly, and crossing of static(al) limits and can avoid.Yet, verified, the requirement of longer life is not only in planetary requirement, also comprise the requirement that the degrees of freedom to play increases, particularly for some application.
Summary of the invention
The planetary pinion that the purpose of this invention is to provide a kind of the above-mentioned type, it is as much as possible little that its play is produced.
For realizing above-mentioned purpose of the present invention, the invention provides a kind of planetary pinion, comprising can be around the planetary carrier of rotatingshaft rotation, be arranged at least one planet wheel on the planetary carrier, central gear and ring gear, wherein, planet wheel is arranged to can move radially with respect to the rotatingshaft of planetary carrier at least, it is characterized in that, the ring gear quilt is divided into two-part perpendicular to the plane of the rotatingshaft of planetary carrier, and wherein, two and half parts of ring gear can be mutually facing to rotating, and along radial deflection, so that reduce play near generation planet wheel on the direction of central gear.
The planetary pinion itself that has the ring gear of cutting apart is known.For this purpose, can be referring to DE 3738607 A1.This known multi-stage planetary gear except having the ring gear of cutting apart, also has the planet wheel of cutting apart.When two and half parts of ring gear faced toward rotation mutually by adjusting screw, two planet wheels were positioned at the position that faces toward mutually, thereby the possible play between ring gear and the planet wheel is avoided.Yet its shortcoming is, on a direction of rotating, only has half of tooth flank of central gear to carry out carrying work.If transmit some power by this gear intentionally, as transmitting by common planetary pinion, the axial overall length of gear increases forcibly.In contrast, providing according to gear of the present invention only has ring gear to cut apart, rather than planet wheel.And replace planet wheel is the movably mode that is bearing in radially, thereby when half part of ring gear rotates, not only the play between planet wheel and the ring gear reduces, and the play between central gear and the planet wheel also reduces, and this is because near the radial deflection on the central gear direction.Its favourable part is the whole axial length supporting that the tooth flank of central gear is crossed over central gear, thereby can ignore the minimizing of play.Planetary overall dimensions can not change.
According to one embodiment of the present of invention, two ring gear half parts can be mutually facing to fixing.For example carrying out like this, is for one and half parts that make ring gear are fixed in the housing, and another half part of ring gear can rotate facing to half fixing part of ring gear by adjusting screw, up to the degrees of freedom that reaches from the hope of play.
Spring-elasticity location that another embodiment can provide two ring gear half parts to face toward mutually on tangentially.For this purpose, one and half parts of ring gear can be fixed in the housing once more, and another half part of ring gear is set to and can rotates by half part fixing with respect to ring gear, and this another half part of ring gear is a spring-loaded that is supported on the housing.The intensity of spring should be selected according to the size of gear with the moment that transmits.
Special most preferred embodiment provides the spring-elasticity of two and half parts of ring gear pre-aligned and their being relatively fixed subsequently.In this embodiment, two and half parts that spring makes ring gear are mutually facing to the location, and this location only needs when the degrees of freedom of preparing to produce from play, in other words under idle running or the situation in very little load.Subsequently, two and half parts of ring gear facing to locating regularly, promptly by screw, thereby make spring needn't transmit moment mutually.
According to a most preferred embodiment, two and half parts of ring gear can interconnect by a gear transmission series, in an axially movable mode of element of gear transmission series, make two and half parts of the gear that goes in ring produce the rotation that faces toward mutually.This gear wheel series, for example it can be a bevel gear, its favourable part is can be regulated by the leading flank of gear from the degrees of freedom of play.If in the installation conditions of gear, play must be regulated again, and the radially accessibility of gear can not guarantee this point advantageous particularly.
If at least one in two and half parts of gear is can be axially movable with respect to another half part of ring gear, can use simple especially gear transmission series.Subsequently, ring gear can axially movable half part can by bevel gear and ring gear axially and tangential half fixing part be connected, thereby the axial dipole field of removable half part of ring gear makes the mutual rotation of two and half parts generation of ring gear.
If the gear transmission series of two and half parts of the ring gear of several gear stage is interconnective, two and half parts of ring gear are particularly advantageous by this coupling of the transmission series of gear.Subsequently, planetary whole gear stage can be used zero-lash mode, regulate by the independent method of operating of the transmission series of gear.
A most preferred embodiment of the present invention provides two and half parts of planetary ring gear to locate in the axial direction, and two and half parts of ring gear can interconnect on tangential by a spring, it makes two and half parts of ring gear under the condition of axial no-fix, and two and half parts of ring gear can rotate mutually.As mentioned above, the intensity of spring is selected by this way, and after fastening screw trip bolt unclamped, two and half parts of ring gear faced toward rotation mutually, thereby make the planetary pinion radial deflection, up to the compensation that reaches play.After reaching this play compensation, axial fastening screw trip bolt is fastened, thereby makes two and half parts of ring gear can face toward fixing mutually.Under zero-lash state, spring does not transmit load.Therefore the intensity of spring needn't adapt to the moment that gear transmits.
A technological scheme that is easy to realize especially provides two and half parts the interconnecting by at least one fastening screw trip bolt of ring gear, fastening screw trip bolt is arranged on the parallel rotatingshaft of two and half parts that pass ring gear, and at least one half part of ring gear, the bore hole that screw is used has the play on ring gear tangential, and half part of ring gear can tangentially move with respect to screw in this manner.This just means that screw can tangentially be fixed in one and half parts of ring gear, and another half part of ring gear has the bore hole with tangential play, thereby makes two and half parts of ring gear can face toward rotation a little mutually.Because play to be eliminated is not very big usually in gear, little difference is enough between the external diameter of bore hole and fastening screw trip bolt.
In simple especially mode on a kind of structure, two and half parts that can be provided with for ring gear face toward the spring that rotates usefulness mutually, wherein, a slot opening enters for the bore hole that holds pressure spring, this groove is arranged in movably half part of ring gear, and above-mentioned pressure spring is facing to the screw radial support.
In multi-stage planetary gear, preferably, the fastened screw of whole half parts of ring gear passes.
Particularly when higher moment is transmitted by gear, at least two radially relative fastening screw trip bolts are set preferably.
For the simple installation of ring gear and simple the manufacturing advantageously, if two and half parts of ring gear each have the groove of centering, two and half parts of the joint of ring gear enter wherein by the engage sleeves that centers.The half independent part of ring gear accordingly at different levels can lamination be a turriform, and here the degrees of freedom that only keeps is the rotations on tangentially at different levels, the i.e. needed degrees of freedom of the degrees of freedom of adjusting gear.
Description of drawings
Embodiments of the invention are illustrated in conjunction with the accompanying drawings.
Fig. 1 illustrates according to planetary perspective diagram of the present invention,
Fig. 2 illustrates the planetary front elevation of Fig. 1,
Fig. 3 illustrates the multistage planetary sectional drawing according to one embodiment of the present of invention,
Fig. 4 illustrates another embodiment's planetary lateral elevational view,
Fig. 5 illustrates the sectional drawing by the embodiment of Fig. 4, and
Fig. 6 illustrates gear by Fig. 5 along the sectional drawing of diameter V1/V1.
Embodiment
In the drawings, the planetary pinion that has planetary carrier 2 rotates around gear shaft 1, and planet wheel 3 and central gear (sun wheel) 4 is shown.Planetary carrier 2 is being wrapped by ring gear 5, the tooth engagement of the tooth of ring gear and planet wheel 3.Ring gear 5 be divided into two and half parts 5 ' and 5 ", one and half parts 5 ' be fixedly connected to housing 6, and another half part 5 " can rotate facing to first half part.By Fig. 1 and 2 as seen, turning power produces by an adjusting screw 7, its screw thread on one side with movably half part 5 of ring gear " carriage 8 engagements, and it is in another side is bearing in supporting base 9 with the half fixing part 5 of ring gear ' be connected.
Function description of the present invention is as follows.
By the rotation of adjusting screw 7, two and half parts 5 of ring gear ' and 5 " mutually facing to rotating.Therefore, the distance with the tooth flank of the ring gear of planet wheel engagement reduces.The minimizing of this distance causes such fact on the one hand, and the play between the tooth of the tooth of planet wheel and ring gear 5 reduces.In case this play vanishing because tooth flank in both sides is in contact with one another, two and half parts 5 of ring gear ' and 5 " be rotated further and force planet wheel on direction, radially to move inward near central gear 4.The effect that this radial deflection produces now is that the tooth engagement between planet wheel 3 and the central gear 4 becomes stronger, and the play between planet wheel 3 and central gear 4 reduces.In case this state reaches, adjusting screw 7 is no longer rotated, but be fixed on this position, and for example, it can realize (not shown) or realize by known mode by reverse nut in the case.Now the planetary pinion of regulating in a kind of zero-lash mode is characterized in that, though the engagement of the tooth of planet wheel and ring gear is only crossed over the tooth flank axial length half, yet, when the highest load generation, be in and the engagement of the holoaxial of central gear 4 to length.Therefore the minimizing of such play makes and can keep physical dimension as far as possible little.
Another embodiment of gear with reference to Fig. 3 with multistage planetary example explanation.Purpose for simplicity is only to making with reference to explanation with the more different place of the foregoing description.
The mode that realizes according to the planetary multistage design of Fig. 3 is, planetary carrier is at its back side bearing central gear 11, and above-mentioned central gear and planetary carrier are integrally made.The second level also has a planetary carrier 12, and on its axle journal 13, planet wheel 14 is radially movably to support with the mode of rotating.Planet wheel 14 is being wrapped by ring gear 15, and it be divided into successively two and half parts 15 ' and 15 ".
Half part 5 ' and 15 ' be fixedly connected to housing 6, in other words by being press-fitted method in place or that cooperation is forced in other assurance.Can on peripheral direction, rotate movably half part 5 " and 15 " not only resembles in other embodiments, and can move diametrically, shown in corresponding arrow.At opposed facing front surface, half part 5 of ring gear ' (with 15 ') and 5 " (with 15 ") has gear ring 16 radially.If half axially movable part 5 ", 15 " is respectively near the half fixing part 5 of ring gear ' and 15 ' move axially, this radially gear ring 16 cause corresponding half part 5 ', 5 " and 15 ', 15 " respectively mutually facing to rotating.Moving of the half movable part of the ring gear in embodiment illustrated in fig. 3 reaches by adjusting screw 7, screw and the thread engagement that is positioned at housing 6.Away from the end bearing of screw head at ring gear 15 " leading flank.
For more regular power distributes, one group of this adjusting screw 7 can follow the periphery setting of star gear housing.For the simple reasons, these adjusting screw are not shown in the drawings.
The engagement that a groove 17 is positioned at ring gear 15 " outer side surface, 18 engagements of connecting element enter above-mentioned groove, and half part 5 of the other end of connecting element 18 and ring gear ".Connecting element 18 comes down to rigidity, yet it can have a spring 20, can compensate a certain amount of play.
Function according to the embodiment of Fig. 3 is described in detail as follows.
The friction of gear connects realization in the known manner.The input shaft (not shown) drives central gear 4.Central gear drives planet wheel 3, this planet wheel ring gear 5 that slips away, thus make planetary carrier 2 enter rotation, at this moment in second level central gear 11, planetary carrier 14 and last planetary carrier 12 are driven, and the latter is connected to output shaft.For the play between the parts of eliminating ring gear and planet wheel and central gear, as in the above-described embodiments, ring gear half part 5 ', 5 " and 15 ', 15 " also mutually facing to rotating.This rotation realizes in the mode that adjusting screw is screwed into housing." the axially skew left because adjusting screw 7 is bearing on the leading flank of ring gear 15 ring gear half part 15.In such cases, corresponding ring gear half part 5 ', the tooth flank of the radially gear ring 16 of 5 " and 15 ', 15 " is in contact with one another respectively.Therefore ring gear half part 15 " axial dipole field make ring gear half part 15 " not only moves axially, and with respect to ring gear half part 15 ' on peripheral direction, rotate.Meanwhile, ring gear half part 15 " move axially be sent to ring gear half part 5 " by connecting element 18.Therefore, ring gear half part 5 " axial rotation, and because radially gear ring 16 is arranged, gear half part 5 ' facing to ring gear half part 5 ' on peripheral direction, rotate.When this mode, the play in each of multi-stage planetary gear grade can reduce by once-through operation.Because the play that can not imagine in each grade equates that spring 20 can be arranged in the connecting element 18, as shown in Figure 3, load is crossed in one of its compensation.In order to consider certain wearing and tearing of tooth flank, this spring also can be made whole with adjusting screw 7.
Though not shown, this multistage gear can also have more level, they interconnect in an identical manner.
Fig. 4 and 6 illustrates another embodiment of the present invention, only the difference with previous embodiment is illustrated here.Use identical figure number as far as possible for identical parts.
The difference basic with the foregoing description be, independent ring gear half part 5 ' and, 5 " by a spring 20 mutually facing to rotating, but locate by a fastening screw trip bolt 21 subsequently mutually.
This structure arranged as shown in Figure 5.Two ring gears 5 and 15 are set here, each have respectively ring gear half part 5 ', 5 " and 15 ', 15 ".
Leading flank quilt cover 22 and 23 in two ring gears 5 and 15 covers.Housing and ring gear 5 and 15 pass axial bore.Half part 5 of ring gear ', 15 ' and housing 22 and 23 in bore hole 24 basically almost accurately corresponding to the diameter of fastening screw trip bolt 21, wherein in housing 23, also be provided with screw thread.The bore hole 25 of ring gear half part 5 " and 15 " has bigger diameter, and like this, when fastening screw trip bolt is screwed into, this of ring gear two and half parts also can be facing to another half part 5 of ring gear ' and 15 ' rotation under the not fastened situation of screw.
In addition, easily find out by Fig. 5, housing 22 and 23 and half part 5 of ring gear ' to 15 ' and have the groove of centering 26 and the sleeve 27 that centers, wherein the sleeve that centers of one and half parts of ring gear fits into the groove that centers of another half part of ring gear.
As seen from Figure 6, along half part 5 of ring gear " tangential, be provided with the groove 28 that radial opening enters bore hole 25.Can be inserted in the groove at the spring 20 of making pressure spring in such cases.Fig. 6 illustrates, and spring 20 is supported in the bottom of groove 28 and radial support on fastening screw trip bolt 21.
Function according to the embodiment of Fig. 4 to 6 describes in detail now.
At first, planetary whole ring gear assembles in one way and makes whole teeth of half independent part of ring gear aim at.After the assembling of independent planetary carrier and planetary pinion, after promptly the planet gear assembled fully, fastening screw trip bolt 21 was released, and spring 20 can be with respect to the half fixing part 5 of ring gear ' and corresponding half part 5 " with 15 " of 15 ' swivel becket gear like this.In the above embodiments, this rotation causes that planetary pinion radially moves inward, and the play between planetary pinion and the central gear reduces so on the one hand, and the play between ring gear and the planetary pinion also reduces on the other hand.This play compensation can be supported in when fastening screw trip bolt unclamps, and gear shaft is rotatable.Because after the effect play of pressure spring 20 reduced, fastening screw trip bolt 21 was fastening once more, thus make ring gear half part 5 ', 5 " and 15 ', 15 " respectively facing to the location with interfixing.Gear is to regulate in zero-lash mode now.If in use occur play once more owing to the wearing and tearing of gear, this because the play that wearing and tearing cause can be eliminated with above-mentioned identical mode, at this moment fastening screw trip bolt temporarily unclamps, and fastening once more subsequently.
Claims (12)
1. planetary pinion, comprise and to center on the planetary carrier (2) that rotatingshaft (1) rotates, be arranged at least one planet wheel (3) on the planetary carrier (2), central gear (4) and ring gear (5), wherein, planet wheel (3) is arranged to can move radially with respect to the rotatingshaft (1) of planetary carrier (2) at least, it is characterized in that, ring gear (5) quilt is divided into two-part perpendicular to the plane of the rotatingshaft (1) of planetary carrier (2), wherein, two and half parts of ring gear (5) (5 ', 5 ") can be mutually facing to rotating; and along the radial deflection that produces planet wheel (3) on the direction near central gear (4), so that reduce play.
2. planetary pinion as claimed in claim 1 is characterized in that, two and half parts of ring gear (5 ', 5 ") can be mutually facing to fixing.
3. planetary pinion as claimed in claim 1 or 2 is characterized in that, two and half parts of ring gear (5 ', 5 ") are that the spring-elastic type with spring 20 faces toward the location mutually on tangentially.
4. as the described planetary pinion of claim 1 to 3, it is characterized in that, two and half parts of ring gear (5 ', 5 ") be by gear series (5 '; 16; 5 ") interconnective, make in one way gear series an element (two and half parts that the moving axially of 5 ") causes ring gear (5 ', 5 ") are mutually facing to rotating.
5. planetary pinion as claimed in claim 4 is characterized in that, one and half parts of ring gear (can move vertically facing to another half part (5 ') of ring gear by 5 ") at least.
6. as claim 4 or 5 described planetary pinions, it is characterized in that planetary pinion is made with multistage, and half part of the ring gear of several gear stage (5 ', 5 "; 15 ', the gear series of 15 ") interconnects by connecting element 18.
7. as the described planetary pinion of one of claim 1 to 6, it is characterized in that, two and half parts of ring gear (5 ', 5 "; 15 ', 15 ") can be located in the axial direction, here, two and half parts of ring gear interconnect by a spring (20) on tangential, it cause ring gear under the axial no-fix condition of two and half parts of ring gear two and half parts (5 ', 5 "; 15 ', the rotation of 15 ").
8. as the described planetary pinion of one of claim 1 to 7, it is characterized in that, two and half parts of ring gear (5 ', 5 "; 15 ', 15 ") interconnect by at least one fastening screw trip bolt (21), two and half parts that fastening screw trip bolt (21) is arranged to be parallel to rotatingshaft (1) and axially to pass ring gear (5 ', 5 "; 15 ', 15 "), wherein, in one and half parts of ring gear at least (5 ", the bore hole (25) that 15 ") are inserted screw (21) usefulness has the play on ring gear (5,15) tangential, this mode make ring gear half part (5 ', 5 "; 15 ', 15 ") are tangentially moved with respect to fastening screw trip bolt (21).
9. as the described planetary pinion of one of claim 1 to 8, it is characterized in that, a groove (19) opening enters bore hole (25) and is used to hold pressure spring (20), this groove (19) be arranged on ring gear movably half part (5 "; in 15 "), above-mentioned pressure spring radially is bearing on the screw (21).
10. as the described planetary pinion of one of claim 1 to 9, it is characterized in that planetary pinion is made up of multistage, and whole half parts of ring gear (5 ', 5 "; 15 ', the fastened screws of 15 ") (21) pass.
11., it is characterized in that it is relative that two fastening screw trip bolts (21) are arranged to diameter as the described planetary pinion of one of claim 1 to 10.
12. as the described planetary pinion of one of claim 1 to 11, it is characterized in that, two and half parts of ring gear (5 ', 5 "; 15 ', each has the groove of centering (26) 15 "), have the sleeve that centers (27) ring gear joint half part (5 ', 5 "; 15 ', 15 ") are engaged on wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141609 CN1282839C (en) | 2002-09-02 | 2002-09-02 | Planetary gear transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02141609 CN1282839C (en) | 2002-09-02 | 2002-09-02 | Planetary gear transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1480668A true CN1480668A (en) | 2004-03-10 |
| CN1282839C CN1282839C (en) | 2006-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02141609 Expired - Fee Related CN1282839C (en) | 2002-09-02 | 2002-09-02 | Planetary gear transmission device |
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| Country | Link |
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| CN (1) | CN1282839C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867651A (en) * | 2014-03-10 | 2014-06-18 | 北京航空航天大学 | Herringbone-tooth star-shaped transmission device |
| CN105134887A (en) * | 2015-08-21 | 2015-12-09 | 吴瑜华 | Precision planetary reducer |
| CN105221673A (en) * | 2015-11-05 | 2016-01-06 | 中国船舶重工集团公司第七二四研究所 | A kind of dual-driving chain zero backlash plane table thermoconductivity meter |
| CN105508585A (en) * | 2016-01-20 | 2016-04-20 | 湖北科峰传动设备有限公司 | Gap-eliminating planetary speed reducer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011001039A1 (en) * | 2011-03-02 | 2012-09-06 | Wittenstein Ag | Adaptive transmission |
-
2002
- 2002-09-02 CN CN 02141609 patent/CN1282839C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867651A (en) * | 2014-03-10 | 2014-06-18 | 北京航空航天大学 | Herringbone-tooth star-shaped transmission device |
| CN103867651B (en) * | 2014-03-10 | 2016-04-06 | 北京航空航天大学 | Herringbone tooth star transmission device |
| CN105134887A (en) * | 2015-08-21 | 2015-12-09 | 吴瑜华 | Precision planetary reducer |
| CN105134887B (en) * | 2015-08-21 | 2018-06-19 | 吴瑜华 | Accurate planetary reducer |
| CN105221673A (en) * | 2015-11-05 | 2016-01-06 | 中国船舶重工集团公司第七二四研究所 | A kind of dual-driving chain zero backlash plane table thermoconductivity meter |
| CN105221673B (en) * | 2015-11-05 | 2017-11-24 | 中国船舶重工集团公司第七二四研究所 | A kind of backlash planetary reducer of dual-driving chain zero |
| CN105508585A (en) * | 2016-01-20 | 2016-04-20 | 湖北科峰传动设备有限公司 | Gap-eliminating planetary speed reducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1282839C (en) | 2006-11-01 |
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