CN202418261U - Accessory transmission device - Google Patents
Accessory transmission device Download PDFInfo
- Publication number
- CN202418261U CN202418261U CN 201120520379 CN201120520379U CN202418261U CN 202418261 U CN202418261 U CN 202418261U CN 201120520379 CN201120520379 CN 201120520379 CN 201120520379 U CN201120520379 U CN 201120520379U CN 202418261 U CN202418261 U CN 202418261U
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- CN
- China
- Prior art keywords
- accessory drive
- accessory
- axle
- external splines
- drive device
- 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.)
- Expired - Lifetime
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Abstract
The utility model provides an accessory transmission device comprising an accessory gear case, a transmission gear installed on the accessory gear case and an accessory transmission shaft connected with the transmission gear. The transmission gear comprises a shaft, an inner spline is arranged on the inner wall of the right end of the shaft, an outer spline is arranged at the left end of the accessory transmission shaft, the inner spline and the outer spline both adopt major diameter centering, and the left end of the accessory transmission shaft is in a positioning connection with the right end of the shaft of the transmission gear by the outer spline and the inner spline. According to the accessory transmission device, the inner spline and the outer spline both adopt the major diameter centering so that the fit clearance between the shaft and the accessory transmission shaft is small. In this way, the fitting of the inner spline and the outer spline plays a role of transmitting torsion and plays a role of supporting the accessory transmission shaft, therefore, a bearing support of the accessory transmission shaft is reduced so that the weight of the accessory transmission device is lightened and the space utilization of the accessory transmission device is improved.
Description
Technical field
The utility model relates to the aircraft engine accessory transmission field, especially, relates to a kind of accessory drive device.
Background technique
The accessory drive device of aeroengine is the vitals of aeroengine.Aeroengine provides power through the accessory drive device to annex, with the rotating speed that satisfies each annex and the requirement of power.Some annexes are relatively independent parts as blower, and therefore, the transmission shaft of blower needs two bearings to support, and has increased the weight and the space of annex gear drive.The accessory drive device generally adopts involute splines to be connected with the accessory drive axle.Spline adopts flank centering, could run well because of involute splines need leave enough backlashs, can cause the accessory drive shaft vibration, influences the working life of accessory drive axle.Therefore adopt flank centering that part is needed the higher processing precision requirement.
The model utility content
The utility model purpose is to provide a kind of accessory drive device, and is big with the weight of the accessory drive device that solves existing technology, the space big, the technical problem of machining accuracy.In addition, the accessory drive device of the utility model has been alleviated the technical problem of annex vibrations at random; And this accessory drive device makes accessory structure compact at random, has improved power to weight ratio.
Be to realize above-mentioned purpose, an aspect according to the utility model provides a kind of accessory drive device, comprising: Accessory Gear Box, be installed on the transmission gear teeth of Accessory Gear Box and the accessory drive axle that is connected with the transmission gear teeth; The transmission gear teeth comprise axle, and the right-hand member inwall of axle is provided with internal spline; The left end of accessory drive axle is provided with external splines; Internal spline and external splines are all taked the centering of big footpath; The right-hand member of the axle of the left end of accessory drive axle and the transmission gear teeth is located by connecting through external splines and internal spline.
Further, the right-hand member of accessory drive axle is connected with annex to be driven.
Further, the outstanding location dimension in the big footpath of external splines for
and external splines be 2mm at the length dimension of the axial direction of accessory drive axle.
Further, external splines is of a size of 2mm at the position length of the axial direction of accessory drive axle.
Further, the right-hand member and the left end of the axle of the transmission gear teeth support by pair of bearings; Internal spline aligns with the bearing at the right-hand member place of the axle of the transmission gear teeth.
Further, driving gear also comprises the gear on the axle that is installed on driving gear.
Further, adopt the cylndrical surface to cooperate between internal spline and the external splines, and matching gap is 0.016～0.045mm.
The utlity model has following beneficial effect: accessory drive device internal spline of the utility model and external splines all adopt the centering of big footpath, and therefore the matching gap between axle and the accessory drive axle is very little.Like this; The effect of both having played transmitting torque that cooperates of internal spline and external splines; Played the effect of Holder Fasteners transmission shaft again, made the accessory drive axle reduce by a bearings, thus alleviated the accessory drive device weight, improved the space availability ratio of accessory drive device.
Except top described purpose, feature and advantage, the utility model also has other purpose, feature and advantage.To do further detailed explanation to the utility model with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the part-structure schematic representation of the accessory drive device of the utility model preferred embodiment; And
Fig. 2 is that the inside and outside spline of accessory drive device of the utility model preferred embodiment is at the enlarged diagram of axially locating size.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Referring to Fig. 1 and Fig. 2, accessory drive axle 3 that the accessory drive device of the utility model comprises Accessory Gear Box 1, be installed on the transmission gear teeth 2 of Accessory Gear Box 1, be connected with the transmission gear teeth 2 and the annex that drives by accessory drive axle 3.In this mode of execution, annex is a blower 4.
Blower 4 is fixed on the Accessory Gear Box 1 through only anchoring a member on the Accessory Gear Box 1, makes the compact overall structure of accessory drive device.
The transmission gear teeth 2 are fixed on the casing of Accessory Gear Box 1.The transmission gear teeth 2 comprise an axle 21 and and axle 21 integrated gears 22.Gear 22 is used for being connected with other part, like this, when axle 21 rotates, can drive other part movement through gear 22.Axle 21 is fixed on the casing of Accessory Gear Box 1 through pair of bearings 23,24.Wherein, bearing 23 is positioned at the right-hand member place of axle 21; Bearing 24 is positioned at the left end place of axle 21.Axle 21 is a hollow shaft, and the inwall of the right-hand member of axle 21 is provided with internal spline 211, internal spline 211 employings big footpath centering.Preferably, internal spline 211 aligns with the bearing 23 at the right-hand member place of axle 21, promptly is positioned on the same straight line.
The outer wall of the left end of accessory drive axle 3 is provided with external splines 31.External splines 31 adopts the centering of big footpath; The outstanding location dimension in the big footpath of external splines is that
right-hand member of accessory drive axle 3 is connected with annex to be driven, like blower 4.Preferably, the right-hand member of accessory drive axle 3 is located by connecting on the annex through a bearing 32.External splines 31 is unsuitable long at the position length size d of the axial direction of accessory drive axle 3, and preferably, position length size d is 2mm.The right-hand member of axle 21 and the left end of accessory drive axle 3 are located by connecting through internal spline 211 and external splines 31.Adopt the cylndrical surface to cooperate between internal spline 211 and the external splines 31, and matching gap is 0.016～0.045mm.After axle 21 is located by connecting accessory drive axle 3; Determine by external splines 31 axial length dimension in the location of axial direction between axle 21 and the accessory drive axle 3; Because external splines 31 location axial length dimension are shorter; Make accessory drive axle 3 swing of several angle arranged, reduce the requirement of installation precision, alleviated the vibration problem that accessory drive axle 3 brings owing to installation precision in radial direction.
The internal spline 211 and the external splines 31 of the utility model all adopts the centering of big footpath, and therefore the matching gap between axle 21 and the accessory drive axle 3 is very little.Like this; The effect of both having played transmitting torque that cooperates of internal spline 211 and external splines 31; Played the effect of Holder Fasteners transmission shaft 3 again, made accessory drive axle 3 reduce by a bearings, thus alleviated the accessory drive device weight, improved the space availability ratio of accessory drive device.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. accessory drive device comprises:
Accessory Gear Box (1), the transmission gear teeth (2) that are installed on said Accessory Gear Box (1) and the accessory drive axle (3) that is connected with the said transmission gear teeth (2),
It is characterized in that,
The said transmission gear teeth (2) comprise axle (21), and the right-hand member inwall of the axle (21) of the said transmission gear teeth (2) is provided with internal spline (211);
The left end of said accessory drive axle (3) is provided with external splines (31);
Said internal spline (211) and said external splines (31) are all taked the centering of big footpath;
The right-hand member of the axle (21) of the left end of said accessory drive axle (3) and the said transmission gear teeth (2) is located by connecting through said external splines (31) and said internal spline (211).
2. accessory drive device according to claim 1 is characterized in that,
The right-hand member of said accessory drive axle (3) is connected with annex to be driven.
3. accessory drive device according to claim 2 is characterized in that,
Said external splines (31) is big, and the location dimension of directly giving prominence to is
and said external splines (31) is 2mm at the length dimension of the axial direction of said accessory drive axle (3).
4. accessory drive device according to claim 2 is characterized in that,
Said external splines (31) is of a size of 2mm at the position length of the axial direction of said accessory drive axle (3).
5. accessory drive device according to claim 3 is characterized in that,
The said right-hand member of the axle (21) of the said transmission gear teeth (2) and left end support by pair of bearings (23,24);
Said internal spline (211) aligns with the said bearing at the right-hand member place of the axle (21) of the said transmission gear teeth (2).
6. accessory drive device according to claim 5 is characterized in that,
Said driving gear (2) also comprises the gear (22) on the axle (21) that is installed on said driving gear (2).
7. accessory drive device according to claim 1 is characterized in that,
Adopt the cylndrical surface to cooperate between said internal spline (211) and the said external splines (31), and matching gap is 0.016～0.045mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120520379 CN202418261U (en) | 2011-12-13 | 2011-12-13 | Accessory transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120520379 CN202418261U (en) | 2011-12-13 | 2011-12-13 | Accessory transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202418261U true CN202418261U (en) | 2012-09-05 |
Family
ID=46743031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120520379 Expired - Lifetime CN202418261U (en) | 2011-12-13 | 2011-12-13 | Accessory transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202418261U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174760A (en) * | 2013-04-09 | 2013-06-26 | 中国航空动力机械研究所 | Coupling and drive gear box with same |
| CN103423424A (en) * | 2013-08-20 | 2013-12-04 | 中国航空动力机械研究所 | Shaft end protecting device for central driving shaft |
| CN107061694A (en) * | 2017-05-27 | 2017-08-18 | 中国航发湖南动力机械研究所 | Accessory gear box and its integrated gear shaft |
| CN107202155A (en) * | 2017-06-02 | 2017-09-26 | 中国航发南方工业有限公司 | Aircraft engine accessory drive mechanism |
-
2011
- 2011-12-13 CN CN 201120520379 patent/CN202418261U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174760A (en) * | 2013-04-09 | 2013-06-26 | 中国航空动力机械研究所 | Coupling and drive gear box with same |
| CN103174760B (en) * | 2013-04-09 | 2015-05-06 | 中国航空动力机械研究所 | Coupling and drive gear box with same |
| CN103423424A (en) * | 2013-08-20 | 2013-12-04 | 中国航空动力机械研究所 | Shaft end protecting device for central driving shaft |
| CN103423424B (en) * | 2013-08-20 | 2016-04-20 | 中国航空动力机械研究所 | A kind of central driving shaft axle head protective equipment |
| CN107061694A (en) * | 2017-05-27 | 2017-08-18 | 中国航发湖南动力机械研究所 | Accessory gear box and its integrated gear shaft |
| CN107202155A (en) * | 2017-06-02 | 2017-09-26 | 中国航发南方工业有限公司 | Aircraft engine accessory drive mechanism |
| CN107202155B (en) * | 2017-06-02 | 2019-09-20 | 中国航发南方工业有限公司 | Aircraft engine accessory drive mechanism |
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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: 20120905 |