CN202579877U - Bearing bushing and gear assembly comprising same - Google Patents
Bearing bushing and gear assembly comprising same Download PDFInfo
- Publication number
- CN202579877U CN202579877U CN 201220085738 CN201220085738U CN202579877U CN 202579877 U CN202579877 U CN 202579877U CN 201220085738 CN201220085738 CN 201220085738 CN 201220085738 U CN201220085738 U CN 201220085738U CN 202579877 U CN202579877 U CN 202579877U
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- China
- Prior art keywords
- periphery
- gear
- gear shaft
- endoporus
- bearing sleeve
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- 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 - Fee Related
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- Gear Transmission (AREA)
Abstract
The utility model provides a bearing bushing, comprising a periphery and an inner hole which is through in the axial direction, wherein the periphery is stepped and comprises a first periphery and a second periphery; screw threads are formed on the first periphery; and the outer diameter of the first periphery is greater than that of the second periphery. The utility model also provides a gear assembly, comprising a gear, a gear shaft integrated with the gear, and a bevel gear mounted on the gear shaft, as well as the bearing bushing, wherein the second section of inner hole is mounted on the gear shaft in an interference fit maner, the first section of inner hole is in clearance fit with the gear shaft. Through adoption of the threaded structure of the first periphery, the bearing bushing provided by the utility model can be demounted without a special demounting tool. In addition, since the inner hole is provided with the first section of inner hole in clearance fit with the gear shaft and the second section of inner hole in interference fit with the gear shaft, the bearing bushing can be mounted and demounted conveniently,, abrasion between the gear shaft and the bearing bushing is reduced, and the service life of the parts is prolonged.
Description
Technical field
The utility model relates to the gas turbine field, especially, relates to a kind of bearing sleeve of gas turbine reducer gear assembly.
Background technique
Gas turbine reducer gear assembly, especially 1 MW class gas turbine retarder assembly comprise straight toothed spur gear, are installed in helical bevel gear and bearing sleeve on the gear shaft in order.Wherein, this bearing sleeve and straight toothed spur gear adopt interference fit to install, and through end face helical bevel gear are tight against the location simultaneously, guarantee that the helical bevel gear engagement is good.At this moment, fit tightly the place at the end face of bearing sleeve and the end face of helical bevel gear, the external diameter of bearing sleeve is less than helical bevel gear end face diameter herein.Thereby in the unloading process of bearing sleeve, band pawl puller can not stretch into faying surface and extract bearing sleeve.And then, bad or when needing the flank of tooth to reprocess in the helical bevel gear flank engagement, make troubles for the dismounting of helical bevel gear.
The model utility content
The utility model purpose is to provide a kind of novel bearing sleeve, to solve existing bearing lining dismounting inconvenience and then to influence the technical problem that helical bevel gear is dismantled.
For realizing above-mentioned purpose, an aspect according to the utility model provides a kind of bearing sleeve; Comprise periphery and the endoporus that connects vertically; It is characterized in that periphery is stepped, it comprises first periphery and second periphery; First periphery is provided with screw thread, and the external diameter of first periphery is greater than the external diameter of second periphery.
Further, endoporus comprises by radially near first section endoporus of first periphery with radially near second section endoporus of second periphery; The aperture of first section endoporus is greater than the aperture of second section endoporus.
According to the utility model on the other hand, a kind of gear assembly is provided also, has comprised gear, with the integrally formed gear shaft of gear and be installed in the bevel gear on the gear shaft, it also comprises above-mentioned bearing sleeve.
Further, second section endoporus interference fit of endoporus is installed on the gear shaft, first section endoporus of endoporus and gear shaft Spielpassung.
Further, bearing sleeve comprises that also bevel gear is installed between gear and the bearing sleeve near first end face of first periphery, one side, and first end face axial is closely against the small end face of bevel gear.
Further, the external diameter of first end face is less than the external diameter of the small end face of helical bevel gear.
The utlity model has following beneficial effect: first periphery of the bearing sleeve that this reality is novel is provided with screw thread; When dismounting, only need sheathed nut on the screw thread periphery; Utilize conventional band pawl puller that nut and bearing sleeve are dismantled in the lump again; This structure operation is convenient, and need be by special extracting tool.Simultaneously; The endoporus segmentation be provided with first section endoporus of gear shaft Spielpassung and with second section endoporus of gear shaft interference fit; This structure has not only made things convenient for the installation and removal of bearing sleeve, and has reduced the wearing and tearing between gear shaft and the bearing sleeve, prolongs the life cycle and the life-span of part.
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 structural representation of the utility model embodiment's bearing sleeve;
Fig. 2 is the structural representation of the gear assembly of the utility model preferred embodiment; And
Fig. 3 is the structural representation of the bearing sleeve of the utility model preferred embodiment.
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, the bearing sleeve of the utility model comprises stepped periphery 1 and an endoporus 2 that connects vertically, wherein; Periphery 1 comprises first periphery 11 and second periphery 12; Wherein, first periphery 11 is provided with screw thread, and the external diameter of first periphery 11 is greater than the external diameter of second periphery 12.
Bearing sleeve also comprises near first end face 110 of first periphery, 11 1 sides with near second end face 120 of second periphery, 12 1 sides vertically.
Referring to Fig. 2, the utility model bearing sleeve be applied on the gas turbine reducer gear assembly, the gear assembly that wherein has this bearing sleeve comprises gear 3, with the integrally formed gear shaft 30 of gear 3 and be installed in the bevel gear 4 on the gear shaft 30.The bearing sleeve of the utility model is sleeved on gear shaft 30; During installation; First end face 110 of bearing sleeve axially cooperates with the small end face of bevel gear 4 and is tight against, and roller bearing inner ring (figure does not show) cooperates on second periphery 12 and the gas turbine retarder, and assurance bearing sleeve axially locating is reliable.Small end face first end face 110 and bevel gear 4 fits tightly the place, the external diameter of first end face 110, and promptly the external diameter of first periphery 11 is less than the small end face diameter herein of bevel gear 4.Meanwhile, diametrically, bearing sleeve is installed on the gear shaft 30 through endoporus 2 interference fit.In a preferred embodiment, said gear 3 is a straight toothed spur gear, and above-mentioned bevel gear 4 is a helical bevel gear, and in other embodiments, said gear 3 also can be the gear of other kind, and above-mentioned bevel gear 4 also can be the bevel gear of other kind.
When bearing sleeve is dismantled, a tapped nut is screwed in ordinatedly is with on externally threaded first periphery 11 earlier, at this moment, guarantee the small end face external diameter of the external diameter of nut greater than the helical bevel gear 4 of this joint place; To be fixed on the small end face near helical bevel gear 4 of nut with the pawl of pawl puller again; Utilize the remaining part of band pawl puller that bearing sleeve and nut are extracted in the lump at last; And then remove other part of gas turbine reducer gear assembly in order; The unloading process of bearing sleeve simply and not need make things convenient for helical bevel gear 4 to dismantle and reprocess by special instrument simultaneously.
Preferably, for easy to process, the screw thread that the screw thread on first periphery 11 is vertically continuously, connects.
Preferably; Referring to Fig. 3; For making things convenient for the installation and removal of bearing sleeve, the wearing and tearing between reducing simultaneously to replace the spare parts mutually, the life cycle and the life-span of prolongation part; Endoporus 2 is set to two sections vertically, comprises radially near first section endoporus 21 of first periphery 11 with radially near second section endoporus 22 of second periphery 12.The aperture of first section endoporus 21 is greater than the aperture of second section endoporus 22.When the bearing sleeve of the utility model is installed in 30 last times of gear shaft of gas turbine reducer gear assembly; Second section endoporus 22 interference fit is installed on the gear shaft 30; First section endoporus 21 and gear shaft 30 Spielpassung, such structure have reduced the mutual wearing and tearing that the friction of bearing sleeve and gear shaft 30 brings.More preferably; Easy to process for producing; First section endoporus 21 is set to the identical aperture of base dimension with second section endoporus 22, and just the tolerance of apolegamy is different, thereby makes the aperture of the section of winning endoporus 21 be slightly larger than the aperture of second section endoporus 22; Simultaneously, slightly to be equal to or less than the length of second periphery 12 be good to the length of second section endoporus 22.
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 (6)
1. bearing sleeve; Comprise periphery (1) and the endoporus (2) that connects vertically; It is characterized in that said periphery (1) is stepped, it comprises first periphery (11) and second periphery (12); Said first periphery (11) is provided with screw thread, and the external diameter of said first periphery (11) is greater than the external diameter of said second periphery (12).
2. bearing sleeve according to claim 1 is characterized in that, said endoporus (2) comprises by radially near first section endoporus (21) of said first periphery (11) with radially near second section endoporus (22) of said second periphery (12); The aperture of said first section endoporus (21) is greater than the aperture of said second section endoporus (21).
3. gear assembly; Comprise gear (3), with the integrally formed gear shaft (30) of said gear (3) and be installed in the bevel gear (4) on the said gear shaft (30), it is characterized in that: comprise that also the aforesaid right that is installed in said gear shaft (30) requires any described bearing sleeve in 1 to 2.
4. gear assembly according to claim 3; It is characterized in that; Second section endoporus (22) interference fit of said endoporus (2) is installed on the said gear shaft (30), first section endoporus (21) of said endoporus (2) and said gear shaft (30) Spielpassung.
5. gear assembly according to claim 4; It is characterized in that; Said bearing sleeve also comprises first end face (110) near said first periphery (11) one sides; Said bevel gear (4) is installed between said gear (3) and the said bearing sleeve, and said first end face (110) axially is closely against the small end face of said bevel gear (4).
6. gear assembly according to claim 5 is characterized in that, the external diameter of said first end face (110) is less than the external diameter of the small end face of said helical bevel gear (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220085738 CN202579877U (en) | 2012-03-08 | 2012-03-08 | Bearing bushing and gear assembly comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220085738 CN202579877U (en) | 2012-03-08 | 2012-03-08 | Bearing bushing and gear assembly comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579877U true CN202579877U (en) | 2012-12-05 |
Family
ID=47249291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220085738 Expired - Fee Related CN202579877U (en) | 2012-03-08 | 2012-03-08 | Bearing bushing and gear assembly comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555775A (en) * | 2018-12-03 | 2019-04-02 | 江西洪都航空工业集团有限责任公司 | A kind of easy-to-dismount bush structure |
-
2012
- 2012-03-08 CN CN 201220085738 patent/CN202579877U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109555775A (en) * | 2018-12-03 | 2019-04-02 | 江西洪都航空工业集团有限责任公司 | A kind of easy-to-dismount bush structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee after: China Hangfa South Industrial Co. Ltd. Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan Patentee before: China Southern Airlines Industry (Group) Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20210308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |