CN203395100U - Central transmission device - Google Patents
Central transmission device Download PDFInfo
- Publication number
- CN203395100U CN203395100U CN201320368444.1U CN201320368444U CN203395100U CN 203395100 U CN203395100 U CN 203395100U CN 201320368444 U CN201320368444 U CN 201320368444U CN 203395100 U CN203395100 U CN 203395100U
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- China
- Prior art keywords
- high speed
- speed shaft
- transmission device
- accessory drive
- central transmission
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Abstract
The utility model discloses a central transmission device which comprises an accessory drive shaft (1) and a high speed shaft (2). The accessory drive shaft (1) is crossed with the high speed shaft (2); the lower part of the accessory drive shaft (1) is provided with a face gear (3); and the high speed shaft (2) enables the accessory drive shaft (1) to rotate by driving the face gear (3). The central transmission device has a compact structure; due to adoption of the face gear, an additional high frequency axial force is avoided being generated on the high speed shaft in the meshing process; and the central transmission device is beneficial for reducing dynamic stress and reducing vibration.
Description
Technical field
The utility model relates to aviation drive technology field, especially, relates to a kind of central transmission device.
Background technique
At present, in aeroengine, need to be used for driving from high-pressure compressor shaft power to accessory drive shaft the mechanisms such as annex, because high-pressure compressor axle rotating speed is higher, and layout is at motor periphery.Conventionally on high pressure is calmed the anger axle, process torsion pass spline C and carry out torsion pass, adopt helical bevel gear to commutate.For the reliability of working, need to adopt the centering of interference fit section, with gland nut, compress.
There are a lot of defects:
(1) complex structure.Need to adopt complicated mounting structure to guarantee combining closely of gear and high speed shaft;
(2) when bevel gear meshes, there is axial dither, easily become the excitation source of high speed shaft vibration;
(3) there is fretting wear in bevel gear and high speed shaft, becomes possible breakdown source.
Therefore oneself is technical problem urgently to be resolved hurrily, to develop a kind of novel central transmission device.
Model utility content
The utility model object is to provide a kind of central transmission device, with solution, never needs to take the measures such as interference fit, solves the technical problem that bevel gear is engaged on axial dither and simplifies mounting structure complexity that high speed shaft cogs etc.
For achieving the above object, according to Yi Ge of the present utility model aspect, a kind of central transmission device is provided, comprise accessory drive axle and high speed shaft, accessory drive transmission shaft and high speed shaft intersect, accessory drive Zhou bottom is set to face gear, and high speed shaft is by driving face gear that accessory drive axle is rotated.
Further, the driving gear of face gear is pressed several angle layout.
Further, on high speed shaft, be provided with at least one cylindrical gears, between high speed shaft and accessory drive axle, by cylindrical gears and the mutual interlock of face gear, drive.
Further, cylindrical gears and high speed shaft are integrated the one-piece element of machine shaping.
Further, accessory drive axle and high speed shaft intersect.
Further, the flank of tooth of cylindrical gears and the medial axis of high speed shaft are parallel.
Further, on high speed shaft, be provided with a plurality of cylindrical gearss.
Further, a plurality of cylindrical gearss are engaged on face gear radial surface.
The utlity model has following beneficial effect:
A, compact structure, adopt face gear to avoid in engagement process, on high speed shaft, producing additional high frequency axial force, is conducive to reduce dynamic stress, reduces vibration.
B, adopt integrated cylindrical gears, cancelled the complicated mounting structure such as interference fit and torsion pass spline, avoided fretting wear.
C, by the Multi-contact between gear, multistage, contact, stability is better.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing that forms a part of asking in this is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the central transmission device of the utility model preferred embodiment.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Fig. 1 is the structural representation of the central transmission device of the utility model preferred embodiment, as shown in Figure 1, central transmission device, comprise accessory drive axle 1 and high speed shaft 2, accessory drive transmission shaft 1 intersects with high speed shaft 2, the bottom of accessory drive axle 1 is set to face gear 3, and high speed shaft 2 is by driving face gear 3 that accessory drive axle 1 is rotated.
It is also, the driving gear of demifacet gear 3 is arranged down.On high speed shaft 2, be provided with a cylindrical gears 4, between high speed shaft 2 and accessory drive axle 1, by cylindrical gears 4 and the mutual interlock of face gear 3, drive.Cylindrical gears 4 and high speed shaft 2 are integrated the one-piece element of machine shaping.Accessory drive axle 1 is pressed several angle with high speed shaft 2 and is intersected.The flank of tooth of cylindrical gears 4 is parallel with the medial axis of described high speed shaft 2.On high speed shaft 2, be provided with a plurality of cylindrical gearss 4.A plurality of cylindrical gearss 4 are engaged on the driving gear of face gear 3 radial surfaces.
During enforcement, central transmission device comprises the component such as high speed shaft 2, face gear 3, integrated machining cylindrical gear 4 on high speed shaft 2.When high speed shaft 2 rotates, by the cylindrical gears 4 on axle, drive face gear 3, realize the accessory drive such as aeroengine, transfer torque to annex.
Adopt cylindrical gears 4 and face gear 3 to realize moment of torsion transmission; The integrated machining cylindrical gear 4 of high speed shaft 2; Compact structure, adopts integrated cylindrical gears 4, has cancelled the complicated mounting structure such as interference fit and torsion pass spline, has avoided fretting wear; Adopt face gear 3 to avoid on high speed shaft 2, producing additional high frequency axial force in engagement process, be conducive to reduce dynamic stress, reduce vibration.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a central transmission device, comprise accessory drive axle (1) and high speed shaft (2), it is characterized in that, described accessory drive transmission shaft (1) intersects with described high speed shaft (2), the bottom of described accessory drive axle (1) is set to face gear (3), and described high speed shaft (2) is by driving described face gear (3) that described accessory drive axle (1) is rotated.
2. central transmission device according to claim 1, it is characterized in that, on described high speed shaft (2), be provided with at least one cylindrical gears (4), between described high speed shaft (2) and described accessory drive axle (1), by described cylindrical gears (4) and the mutual interlock of described face gear (3), drive.
3. central transmission device according to claim 2, is characterized in that, described cylindrical gears (4) and described high speed shaft (2) are integrated the one-piece element of machine shaping.
4. according to the central transmission device described in any one in claims 1 to 3, it is characterized in that, described accessory drive axle (1) intersects with described high speed shaft (2).
5. according to the central transmission device described in claim 2 or 3, it is characterized in that, the flank of tooth of described cylindrical gears (4) is parallel with the medial axis of described high speed shaft (2).
6. according to the central transmission device described in claim 2 or 3, it is characterized in that, on described high speed shaft (2), be provided with a plurality of described cylindrical gearss (4).
7. central transmission device according to claim 6, is characterized in that, a plurality of described cylindrical gearss (4) are engaged on described face gear (3) radial surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320368444.1U CN203395100U (en) | 2013-06-25 | 2013-06-25 | Central transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320368444.1U CN203395100U (en) | 2013-06-25 | 2013-06-25 | Central transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203395100U true CN203395100U (en) | 2014-01-15 |
Family
ID=49906635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320368444.1U Expired - Lifetime CN203395100U (en) | 2013-06-25 | 2013-06-25 | Central transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203395100U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650206A (en) * | 2016-03-31 | 2016-06-08 | 中国航空动力机械研究所 | Helicopter transmission device |
| CN112943901A (en) * | 2021-02-05 | 2021-06-11 | 中国航发沈阳发动机研究所 | Gear transmission structure |
-
2013
- 2013-06-25 CN CN201320368444.1U patent/CN203395100U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650206A (en) * | 2016-03-31 | 2016-06-08 | 中国航空动力机械研究所 | Helicopter transmission device |
| CN112943901A (en) * | 2021-02-05 | 2021-06-11 | 中国航发沈阳发动机研究所 | Gear transmission structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |