CN203297581U - Axial fixing structure of sun wheel - Google Patents
Axial fixing structure of sun wheel Download PDFInfo
- Publication number
- CN203297581U CN203297581U CN2013202758700U CN201320275870U CN203297581U CN 203297581 U CN203297581 U CN 203297581U CN 2013202758700 U CN2013202758700 U CN 2013202758700U CN 201320275870 U CN201320275870 U CN 201320275870U CN 203297581 U CN203297581 U CN 203297581U
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- China
- Prior art keywords
- sun wheel
- wheel shaft
- locking nut
- fixing structure
- sun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses an axial fixing structure of a sun wheel. The axial fixing structure of the sun wheel is mainly used for fixing the sun wheel of a former level and a big gear wheel of a later level or a planet carrier. The big gear wheel is connected to a sun wheel shaft in a transmission mode, and bearings are arranged on the big gear wheel. The axial fixing structure of the sun wheel is mainly characterized in that external threads are directly machined in the sun wheel shaft and a big gear wheel shaft, the nominal diameter is increased, the dangerous sectional area of each thread is also increased, and the connecting strength and the shock-resisting capacity of a thread pair are greatly improved. Meanwhile, a locating ring which is in locating embedded installation is arranged on the sun wheel shaft, and is further connected to the sun wheel shaft and the big gear wheel shaft through an inner locking nut and an outer locking nut respectively in a locking mode, the single-nut screwing fixing mode is adopted, the phenomenon of uniform load does not exist, moment does not need to be controlled, installation is convenient, assembly cost is low, and locking is reliable. In addition, due to the facts that the inner locking nut and the outer locking nut can be repeatedly used, and connecting strength and the degree of reliability cannot be reduced, maintenance cost of the later period is low.
Description
Technical field
The utility model relates to the axial fixing structure in a kind of mechanical transmission, refers in particular to a kind of sun gear axial fixing structure that is applicable in epicyclic gearbox.
Background technique
In the epicyclic gearboxes such as wind turbine gearbox, between the sun gear of previous stage and the gearwheel of rear one-level or planet carrier, the normal spline that adopts is in transmission connection, and this linkage structure bearing capacity is high, and floating effect is good, has therefore obtained application comparatively widely.Yet, the axially locating problem of sun gear is hindering the further popularization of this structure always, sustained oscillation due to sun gear in running, often cause the sun gear axial positioning structure bearing the impulsive load of frequent variations, and traditional sun gear axial positioning structure is all the combination that pressing plate adds bolt, this axial fixing structure poor reliability, often lost efficacy, and even causes the damage of whole gear-box.
Summary of the invention
Technical problem to be solved in the utility model be to overcome the defect of prior art and provide that a kind of axially locating is reliable, bearing capacity is strong, can repeat dismounting can not affect join strength, safeguard simple sun gear axial fixing structure.
Technical problem of the present utility model is achieved through the following technical solutions:
A kind of sun gear axial fixing structure, comprise the sun wheel shaft that sun gear and sun gear afterbody extend, this sun wheel shaft is provided with the gearwheel that is in transmission connection, on the Large Gear Shaft During of this gearwheel, bearing is set, described sun wheel shaft afterbody is provided with the positioning ring of suit, this positioning ring left end is provided with flange, described sun wheel shaft afterbody also be provided with the left side of flange do location near the interior shaft shoulder, the right side of positioning ring is by the internal locking nut check that is connected to the sun wheel shaft afterbody; Described Large Gear Shaft During right side is provided with interior shoulder, and the Large Gear Shaft During afterbody is provided with the outer locking nut, and the flange location of described positioning ring is inlaid in the positioning ring groove that consists of interior shoulder, outer locking nut and the interior shaft shoulder.
Between described internal locking nut and positioning ring right side, interior locked spacer is set.
Described Large Gear Shaft During afterbody is provided with the outer shaft shoulder, between described outer locking nut and the outer shaft shoulder, outer locked spacer is set, and between this outer locked spacer and bearing, baffle ring is set.
Between the interior shoulder of described flange outer peripheral surface and Large Gear Shaft During, be provided with radial floating gap α, this radial floating gap α is 1mm ~ 2mm.
Between described flange right side and outer locking nut, be provided with the axial float gap beta, this axial float gap beta is 1mm ~ 2mm.
Between described sun wheel shaft and gearwheel, being provided with spline is in transmission connection.
Compared with prior art, the utility model is mainly that outside thread is directly processed on sun wheel shaft and Large Gear Shaft During, nominal diameter is large, the screw thread dangerouse cross-section is long-pending has increased tens times than conventional bolt fixed structure, improved greatly linking intensity and the impact resistance of screw pair, efficiently solved conventional bolt and under impulsive load, easily break the problem of inefficacy.Simultaneously, on sun wheel shaft, be provided with the positioning ring of location setting-in, this positioning ring is locked respectively and is connected on sun wheel shaft, Large Gear Shaft During by inside and outside locking nut again, it is that a kind of single nut is tightened means of fixation, can not have the problem of all carrying, more without control moment, easy for installation, assembly cost is cheap, and locking point reduces to two places, and is locking very reliable.And inside and outside locking nut more can repeatedly use, and but can not reduce linking intensity and reliability, and later maintenance cost is low.
The accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model.
Fig. 2 is the A place enlarged view of Fig. 1.
Fig. 3 is the B place enlarged view of Fig. 1.
Embodiment
Below will to the utility model embodiment, elaborate again by above-mentioned accompanying drawing.
As Fig. 1 ~ shown in Figure 3,1. sun gear, 11. sun wheel shaft, 2. gearwheel, 21. Large Gear Shaft During, 3. bearing, 4. internal locking nut, 5. interior locked spacer, 6. positioning ring, 61. flanges, 7. outer locking nut, 8. outer locked spacer, 9. baffle ring.
The sun gear axial fixing structure, as shown in Figure 1, mainly refer to sun gear 1 and the gearwheel 2 of rear one-level or the axial fixing structure between planet carrier of previous stage.In the various epicyclic gearboxes that it is specially adapted to that applying working condition is severe, load fluctuation is large, it is large to impact or reliability requirement is high, as wind turbine gearbox etc.
Described sun gear 1 is provided with the sun wheel shaft 11 of extending to the right, and the sun wheel shaft of this right-hand member is namely the afterbody of sun gear 1; Described sun wheel shaft 11 is provided with gearwheel 2, between this sun wheel shaft and gearwheel, be provided with by bearing capacity high, the spline structure that floating effect is good is in transmission connection, the left and right two ends of this gearwheel 2 all are extended with Large Gear Shaft During 21, bearing 3 is installed on it, and the Large Gear Shaft During 21 of right-hand member is also the afterbody of gearwheel 2.
Described sun wheel shaft 11 afterbody outer surfaces are provided with the shaft shoulder in a circle as shown in Figure 2, on this afterbody, also are set with positioning ring 6, and the left end of positioning ring is provided with a circle flange 61; Described flange left side abuts against on the interior shaft shoulder and positions, the right side of positioning ring 6 is to connect locking by the internal locking nut 4 that is threaded in sun wheel shaft 11 afterbodys, interior locked spacer 5 is set to prevent the axial float of positioning ring 6 between the right side of internal locking nut 4 and positioning ring 6.
Described Large Gear Shaft During 21 right sides are provided with interior shoulder, Large Gear Shaft During 21 afterbodys are provided with the outer locking nut 7 that is threaded, the interior shaft shoulder in being somebody's turn to do on shoulder, outer locking nut and sun wheel shaft 11 has formed a positioning ring groove jointly, and make the flange 61 of positioning ring 6 just in time locate and be inlaid in this positioning ring groove, therefore this structure can realize the two-way location of positioning ring 6.Simultaneously, between the interior shoulder of as shown in Figure 3 flange 61 outer peripheral surfaces and Large Gear Shaft During 21, be provided with the radial floating gap α of 1mm; Between flange 61 right sides and outer locking nut 7, also be provided with the axial float gap beta of 1mm.Sun gear 1 can guarantee that by two gaps spline possesses suitable floating space in movement process, floating effect is good.
Described Large Gear Shaft During 21 afterbody outer surfaces are provided with the outer shaft shoulder of a circle, and outer locked spacer 8 is set between outer locking nut 7 and the outer shaft shoulder, between this outer locked spacer and bearing 3, baffle ring 9 are set.
Positioning ring 6 in this sun gear axial fixing structure is important positioning elements, and adopts high-intensity locking nut and locked spacer to carry out two-wayly being located by connecting fixingly to positioning ring, just can better optimize the axially locating mode of sun gear.
The utility model is compared traditional pressing plate, bolt fastening structure and is also had following advantages:
One, the outside thread of this structure is that directly processing is on sun wheel shaft 11 and Large Gear Shaft During 21, nominal diameter is large, the screw thread dangerouse cross-section is long-pending has increased tens times than conventional bolt fixed structure, improved greatly linking intensity and the impact resistance of screw pair, efficiently solved conventional bolt and under impulsive load, easily break the problem of inefficacy.
Two, the conventional bolt fixed structure adopts one group of Bolt Connection usually, and is bolt strained evenly for each, needs to adopt torque wrench accurately to control bolt tightening moment, the assembly process complexity, and assembling difficulty is large.And there is not the problem of all carrying in the mode that this structure adopts single nut to tighten, and without control moment, nut screwing clamping gets final product, and is easy for installation, and assembly cost is cheap.
Three, all to adopt single high-intensity locked spacer to carry out stop locking for inside and outside locking nut, and it is locking that it belongs to a kind of machinery, easy for installation and anti-loosing effect good, shock resistance anti-vibration ability is strong, overcome the conventional construction bolt numerous, locking point is many, the shortcoming of locking poor reliability.
Four, conventional bolt fixed structure, attachment bolt, after the torque wrench pretension, can not use by secondary, and the structural maintenance cost is high.The inside and outside locking nut that this structure adopts can repeatedly use, and but can not reduce linking intensity and reliability, and later maintenance cost is low.
Claims (6)
1. sun gear axial fixing structure, comprise the sun wheel shaft (11) that sun gear (1) and sun gear afterbody extend, this sun wheel shaft is provided with the gearwheel (2) that is in transmission connection, and bearing (3) is set on the Large Gear Shaft During of this gearwheel (21), it is characterized in that:
A, described sun wheel shaft (11) afterbody are provided with the positioning ring (6) of suit, this positioning ring left end is provided with flange (61), described sun wheel shaft (11) afterbody also be provided with the left side of flange (61) do location near the interior shaft shoulder, the right side of positioning ring (6) is by internal locking nut (4) locking that is connected to sun wheel shaft (11) afterbody;
B, described Large Gear Shaft During (21) right side are provided with interior shoulder, Large Gear Shaft During (21) afterbody is provided with outer locking nut (7), and flange (61) location of described positioning ring (6) is inlaid in the positioning ring groove that consists of interior shoulder, outer locking nut (7) and the interior shaft shoulder.
2. sun gear axial fixing structure according to claim 1, is characterized in that, between described internal locking nut (4) and positioning ring (6) right side, interior locked spacer (5) is set.
3. sun gear axial fixing structure according to claim 1, it is characterized in that described Large Gear Shaft During (21) afterbody is provided with the outer shaft shoulder, outer locked spacer (8) is set between described outer locking nut (7) and the outer shaft shoulder, baffle ring (9) is set between this outer locked spacer and bearing.
4. sun gear axial fixing structure according to claim 1, is characterized in that being provided with radial floating gap α between the interior shoulder of described flange (61) outer peripheral surface and Large Gear Shaft During (21), and this radial floating gap α is 1mm ~ 2mm.
5. sun gear axial fixing structure according to claim 1, is characterized in that being provided with the axial float gap beta between described flange (61) right side and outer locking nut (7), and this axial float gap beta is 1mm ~ 2mm.
6. the described sun gear axial fixing structure of according to claim 1 ~ 5 any one, is characterized in that between described sun wheel shaft (11) and gearwheel (2), being provided with spline is in transmission connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202758700U CN203297581U (en) | 2013-05-21 | 2013-05-21 | Axial fixing structure of sun wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202758700U CN203297581U (en) | 2013-05-21 | 2013-05-21 | Axial fixing structure of sun wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297581U true CN203297581U (en) | 2013-11-20 |
Family
ID=49573589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202758700U Withdrawn - After Issue CN203297581U (en) | 2013-05-21 | 2013-05-21 | Axial fixing structure of sun wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297581U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244656A (en) * | 2013-05-21 | 2013-08-14 | 宁波东力新能源装备有限公司 | Sun wheel axial fixing structure |
| WO2021088588A1 (en) * | 2019-11-06 | 2021-05-14 | 南京高速齿轮制造有限公司 | Assembly structure of sun gear shaft and spline shaft of wind power gear box |
-
2013
- 2013-05-21 CN CN2013202758700U patent/CN203297581U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244656A (en) * | 2013-05-21 | 2013-08-14 | 宁波东力新能源装备有限公司 | Sun wheel axial fixing structure |
| CN103244656B (en) * | 2013-05-21 | 2015-10-28 | 宁波东力机械制造有限公司 | Sun gear axial fixing structure |
| WO2021088588A1 (en) * | 2019-11-06 | 2021-05-14 | 南京高速齿轮制造有限公司 | Assembly structure of sun gear shaft and spline shaft of wind power gear box |
| US11359610B2 (en) | 2019-11-06 | 2022-06-14 | Nanjing High-Speed Gear Manufacturing Co., Ltd. | Assembly structure of sun gear shaft and spline shaft of a gearbox for wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131120 Effective date of abandoning: 20151028 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |