CN205309319U - Activity live centre - Google Patents
Activity live centre Download PDFInfo
- Publication number
- CN205309319U CN205309319U CN201620002252.2U CN201620002252U CN205309319U CN 205309319 U CN205309319 U CN 205309319U CN 201620002252 U CN201620002252 U CN 201620002252U CN 205309319 U CN205309319 U CN 205309319U
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- China
- Prior art keywords
- face
- axle journal
- housing
- ball bearing
- bearing
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Abstract
The utility model provides an activity live centre, includes casing, top dabber and the top body, the casing in be equipped with top dabber, the preceding terminal surface of top dabber be equipped with the middle part axle journal, top spindle cover has the thrust ball bearing inner circle, the terminal surface is conflicted with the middle part axle journal before the thrust ball bearing inner circle, thrust ball bearing outer lane rear end face is conflicted with housing end surface, be provided with angular contact bearing between middle part axle journal and the shells inner wall, middle part axle journal front end is equipped with the top body, be provided with the centre head before the top body on the terminal surface, the centre head is through end face centre's before short circle axle and the top body hole transition fit, and top side end is provided with the first screw that ends that is used for the tight short circle axle in top, and the cover has a front end housing on the top body circumference, conflicts with the angular contact bearing outer lane and be connected in the interior border of front end housing, the preceding terminal surface screw -thread fit of front end housing and casing, the utility model discloses the change of can moving about of simple structure, centre head, use cost is low, safe and reliable, long service life, top precision is high.
Description
Technical field
This utility model relates to field of mechanical technique, specifically a kind of movable live centre.
Background technology
Current lathe is for workpiece location and holds out against with top installation location, usually top afterbody is processed as the shape of the frustum of a cone, simultaneously, top installs the conical bore that axle installation site is also machined to coordinate with top afterbody, top cooperation is installed on and changes in circular cone sky, simultaneously again with end cap or flange screw. When top due to abrasion need change time, this structure make top dismounting difficulty, it usually needs assist dismounting in top installation axle internal punches; And the taper seat for large-scale part coordinates, part processing relative difficulty, it is unfavorable for processing that is top and that install axle mating holes; Meanwhile, when pressure is bigger, taper seat cooperation place can produce very big contact stress so that top possibility produces the problem such as material yield, bonding herein. And the life-span is short, it is easy to damage, change inconvenience, meanwhile, top low precision; It addition, existing top tip is often returned and is scratched, burns, fractures, thus making whole top be eliminated, economic loss is relatively big, and production cost is higher.
Utility model content
The purpose of this utility model is in that to provide one to change, and use cost is low, safe and reliable, long service life, the movable live centre that top precision is high, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme:
A kind of movable live centre, including housing, top mandrel and top body, top mandrel it is provided with in described housing, the front end face of described top mandrel is provided with middle part axle journal, top mandrel is cased with thrust ball bearing inner ring, thrust ball bearing inner ring front end face is conflicted with middle part axle journal, thrust ball bearing outer ring rear end face is conflicted with housing end face, it is provided with angular contact bearing between described middle part axle journal and inner walls, axle journal front end, middle part is provided with top body, described top body front end face is provided with centre head, described centre head is by the endoporus interference fits of short circular shaft Yu top body front end face center, top side end is provided with the stopping screw for holding out against short circular shaft, top body circumference is cased with drive end bearing bracket, conflict with angular contact bearing outer ring and be connected in the inside edge of drive end bearing bracket, drive end bearing bracket and housing forward end face threaded engagement, described top core back-end is provided with afterbody axle journal, it is provided with deep groove ball bearing between afterbody axle journal and inner walls, afterbody axle journal rear end is provided with the non-return pad conflicted with deep groove ball bearing inner ring, housing rear end face is equipped with rear end cap, conflict with deep groove ball bearing outer ring and be connected in the inside edge of rear end cap.
Further, described drive end bearing bracket inner peripheral surface is provided with and the front sealing ring of top body circumference contact.
Further, described drive end bearing bracket outer face is provided with installation screwed hole.
Further, the middle part axle journal between described thrust ball bearing inner ring front end face and angular contact bearing inner ring is arranged with bearing ring.
Further, described rear end cap and housing rear end face are provided with rear sealing gasket.
Further, the housing exterior walls between described thrust bearing and angular contact bearing offers oil-in.
Compared with prior art, the beneficial effects of the utility model are: adopt angular contact bearing between middle part axle journal and inner walls, top mandrel is cased with thrust ball bearing inner ring, thrust ball bearing inner ring front end face is conflicted with middle part axle journal, thrust ball bearing outer ring rear end face is conflicted with housing end face, deep groove ball bearing is adopted between afterbody axle journal and inner walls, so arrange, it is effectively guaranteed the quality of fit of each bearing and top mandrel, thus ensureing that centre head has higher precision, whole top mandrel is not susceptible to damage, long service life; Centre head is by the endoporus interference fits of short circular shaft Yu top body front end face center, and top side end is provided with the stopping screw for holding out against short circular shaft, when centre head is damaged, only need to change centre head, device can be continuing with, and replacement operation is convenient, greatly reduces use cost; Rear end cap and housing rear end face are provided with rear sealing gasket, drive end bearing bracket inner peripheral surface are provided with and the front sealing ring of top body circumference contact, are prevented effectively from the leakage of lubricating oil, have saved use cost. This utility model simple in construction, centre head can movable be changed, and use cost is low, safe and reliable, long service life, and top precision is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of movable live centre.
In figure: 1-housing, the top mandrel of 2-, 3-centre head, the top body of 4-, axle journal in the middle part of 5-, 6-afterbody axle journal, 7-stopping screw, 8-drive end bearing bracket, 9-angular contact bearing, 10-bearing ring, 11-oil-in, 12-thrust ball bearing, 13-deep groove ball bearing, 14-non-return pad, sealing gasket after 15-, 16-rear end cap, 17-installs screwed hole, sealing ring before 18-.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments. Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1, in this utility model embodiment, a kind of movable live centre, including housing 1, top mandrel 2 and top body 4, top mandrel 2 it is provided with in described housing 1, the front end face of described top mandrel 2 is provided with middle part axle journal 5, top mandrel 2 is cased with thrust ball bearing 12 inner ring, thrust ball bearing 12 inner ring front end face and middle part axle journal 5 are conflicted, thrust ball bearing 12 outer ring rear end face is conflicted with housing 1 end face, it is provided with angular contact bearing 9 between described middle part axle journal 5 and housing 1 inwall, axle journal 5 front end, middle part is provided with top body 4, described top body 4 front end face is provided with centre head 3, described centre head 3 is by the endoporus interference fits of short circular shaft Yu top body 4 front end face center, top body 4 side is provided with the stopping screw 7 for holding out against short circular shaft, top body 4 circumference is cased with drive end bearing bracket 6, conflict with angular contact bearing 9 outer ring and be connected in the inside edge of drive end bearing bracket 6, drive end bearing bracket 8 and housing 1 front end face threaded engagement, described top mandrel 2 rear end is provided with afterbody axle journal 6, it is provided with deep groove ball bearing 13 between afterbody axle journal 6 and housing 1 inwall, afterbody axle journal 6 rear end is provided with the non-return pad 14 conflicted with deep groove ball bearing 13 inner ring, housing 1 rear end face is equipped with rear end cap 16, conflict with deep groove ball bearing 13 outer ring and be connected in the inside edge of rear end cap 16.
In embodiment, described drive end bearing bracket 8 inner peripheral surface is provided with and the front sealing ring 18 of top body 4 circumference contact.
In embodiment, described drive end bearing bracket 8 outer face is provided with installation screwed hole 17.
In embodiment, the middle part axle journal 5 between described thrust ball bearing 12 inner ring front end face and angular contact bearing 9 inner ring is arranged with bearing ring 10.
In embodiment, described rear end cap 16 is provided with rear sealing gasket 15 with housing 1 rear end face.
In embodiment, housing 1 outer wall between described thrust bearing 12 and angular contact bearing 9 offers oil-in 11.
Operation principle of the present utility model is: adopt angular contact bearing 9 between middle part axle journal 5 and housing 1 inwall, top mandrel 2 is cased with thrust ball bearing 12 inner ring, thrust ball bearing 12 inner ring front end face and middle part axle journal 5 are conflicted, thrust ball bearing 12 outer ring rear end face is conflicted with housing 1 end face, deep groove ball bearing 13 is adopted between afterbody axle journal 6 and housing 1 inwall, so arrange, it is effectively guaranteed the quality of fit of each bearing and top mandrel 2, thus ensureing that centre head 3 has higher precision, whole top mandrel 2 is not susceptible to damage, long service life; Centre head 3 is by the endoporus interference fits of short circular shaft Yu top body 4 front end face center, top body 4 side is provided with the stopping screw 7 for holding out against short circular shaft, when centre head 3 is damaged, only need to change centre head 3, live centre can be continuing with, replacement operation is convenient, greatly reduces use cost; Rear end cap 16 and housing 1 rear end face are provided with rear sealing gasket 15, drive end bearing bracket 8 inner peripheral surface are provided with and the front sealing ring 18 of top body 4 circumference contact, are prevented effectively from the leakage of lubricating oil, have saved use cost.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms. Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model. Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, and the technical scheme in each embodiment through appropriately combined, can also form other embodiments that it will be appreciated by those skilled in the art that.
Claims (6)
1. a movable live centre, including housing, top mandrel and top body, it is characterized in that, top mandrel it is provided with in described housing, the front end face of described top mandrel is provided with middle part axle journal, top mandrel is cased with thrust ball bearing inner ring, thrust ball bearing inner ring front end face is conflicted with middle part axle journal, thrust ball bearing outer ring rear end face is conflicted with housing end face, it is provided with angular contact bearing between described middle part axle journal and inner walls, axle journal front end, middle part is provided with top body, described top body front end face is provided with centre head, described centre head is by the endoporus interference fits of short circular shaft Yu top body front end face center, top side end is provided with the stopping screw for holding out against short circular shaft, top body circumference is cased with drive end bearing bracket, conflict with angular contact bearing outer ring and be connected in the inside edge of drive end bearing bracket, drive end bearing bracket and housing forward end face threaded engagement, described top core back-end is provided with afterbody axle journal, it is provided with deep groove ball bearing between afterbody axle journal and inner walls, afterbody axle journal rear end is provided with the non-return pad conflicted with deep groove ball bearing inner ring, housing rear end face is equipped with rear end cap, conflict with deep groove ball bearing outer ring and be connected in the inside edge of rear end cap.
2. a kind of movable live centre according to claim 1, it is characterised in that be provided with on described drive end bearing bracket inner peripheral surface and the front sealing ring of top body circumference contact.
3. a kind of movable live centre according to claim 1, it is characterised in that be provided with installation screwed hole on described drive end bearing bracket outer face.
4. a kind of movable live centre according to claim 1, it is characterised in that be arranged with bearing ring on the middle part axle journal between described thrust ball bearing inner ring front end face and angular contact bearing inner ring.
5. a kind of movable live centre according to claim 1, it is characterised in that described rear end cap and housing rear end face are provided with rear sealing gasket.
6. a kind of movable live centre according to claim 1, it is characterised in that offer oil-in on the housing exterior walls between described thrust bearing and angular contact bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620002252.2U CN205309319U (en) | 2016-01-05 | 2016-01-05 | Activity live centre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620002252.2U CN205309319U (en) | 2016-01-05 | 2016-01-05 | Activity live centre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205309319U true CN205309319U (en) | 2016-06-15 |
Family
ID=56200650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620002252.2U Active CN205309319U (en) | 2016-01-05 | 2016-01-05 | Activity live centre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205309319U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511725A (en) * | 2016-11-07 | 2017-12-26 | 襄阳博亚精工装备股份有限公司 | Precision movable center device |
| CN108408603A (en) * | 2018-05-23 | 2018-08-17 | 明峰医疗系统股份有限公司 | A kind of portable pet detector attaching/detaching apparatus |
-
2016
- 2016-01-05 CN CN201620002252.2U patent/CN205309319U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511725A (en) * | 2016-11-07 | 2017-12-26 | 襄阳博亚精工装备股份有限公司 | Precision movable center device |
| CN107511725B (en) * | 2016-11-07 | 2024-03-26 | 襄阳博亚精工装备股份有限公司 | Precise movable center device |
| CN108408603A (en) * | 2018-05-23 | 2018-08-17 | 明峰医疗系统股份有限公司 | A kind of portable pet detector attaching/detaching apparatus |
| CN108408603B (en) * | 2018-05-23 | 2024-01-23 | 明峰医疗系统股份有限公司 | Portable PET detector dismouting device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |