CN203956773U - Precision friction expansion core detent mechanism - Google Patents
Precision friction expansion core detent mechanism Download PDFInfo
- Publication number
- CN203956773U CN203956773U CN201420270924.9U CN201420270924U CN203956773U CN 203956773 U CN203956773 U CN 203956773U CN 201420270924 U CN201420270924 U CN 201420270924U CN 203956773 U CN203956773 U CN 203956773U
- Authority
- CN
- China
- Prior art keywords
- bearing pin
- cylindrical roller
- expansion sleeve
- elastic expansion
- retainer
- 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 - Fee Related
Links
Abstract
The utility model relates to a kind of precision friction expansion core detent mechanism, by bearing pin, elastic expansion sleeve, retainer, cylindrical roller and axle form with snap ring, it is characterized in that: bearing pin front end is with tapering, elastic expansion sleeve is sleeved on the front end of bearing pin, the endoporus of elastic expansion sleeve also coordinates with bearing pin with identical tapering and by n cylindrical roller, between bearing pin and elastic expansion sleeve endoporus, be inlaid with retainer, on retainer, be furnished with n cylindrical roller, and be evenly distributed on whole conical surface, cylindrical roller and bearing pin axis are 5-9 ゜ friction angle, axle is fixed in the annular groove of the bearing pin front end conical surface with snap ring.Its compact conformation, quick and convenient, can pinpoint Advanced Equipment, can raise the efficiency, can better ensure the precision of product not only but also can reduce production costs.
Description
Technical field
The utility model relates to a kind of precision friction expansion core detent mechanism, belongs to part processing positioning field.
Background technology
At present numerous parts (such as Shell-Class) often can run into the situation with location, hole, the location original paper alignment pin often of use in processing, checkout procedure.And the fit clearance in alignment pin and hole often becomes the largest source of alignment error.So people expect eliminating gap by interference fit, the problem of bringing is handling inconvenience and in latch and the process of pulling pin, workpiece locating surface is caused to scuffing.So expected with expansion core element location, but all there is such or such problem in similar products, as: 1. expansion block formula: adjustable range is large, belongs to jack catchs type positioning clamping device.But mechanism's complexity, volume are large, precision is not high.2. adjustable hydraulic formula: precision is high.But volume is large, need again to inject mineral oil.Manufacturing cost, maintenance and repair cost are all higher.3. adjustable jack catchs type: similar the first.4. expansion sleeve type: precision is high, volume is large, mechanism is complicated, and process costs is high.Visible traditional bearing pin class expansion core mechanism or complex structure, or volume is excessive, precision is unstable, and what also have needs support of ancillary equipment etc.And the demand of similar frock is huge especially.
Summary of the invention
The purpose of this utility model is to provide a kind of precision friction expansion core detent mechanism, its compact conformation, quick and convenient, can pinpoint Advanced Equipment, can raise the efficiency, can better ensure the precision of product not only but also can reduce production costs.
The technical solution of the utility model is achieved in that a kind of precision friction expansion core detent mechanism, by bearing pin, elastic expansion sleeve, retainer, cylindrical roller and axle form with snap ring, it is characterized in that: bearing pin front end is with tapering, elastic expansion sleeve is sleeved on the front end of bearing pin, the endoporus of elastic expansion sleeve also coordinates with bearing pin with identical tapering and by n cylindrical roller, between bearing pin and elastic expansion sleeve endoporus, be inlaid with retainer, on retainer, be furnished with n cylindrical roller, and be evenly distributed on whole conical surface, cylindrical roller and bearing pin axis are 5-9 ゜ friction angle, axle is fixed in the annular groove of the bearing pin front end conical surface with snap ring.
The diameter of described cylindrical roller is 3-8 of ∮ 5-80.
[0005]good effect of the present utility model is its simple in structure, registration, with low cost, has universality, can be easy to use in the removable location structure between various jigs, assembling jig, inspection jig and various engineering goods parts.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is section of structure of the present utility model.
Fig. 3 is the structural representation of elastic expansion sleeve of the present utility model.
Fig. 4 is the structural representation of the bearing pin of utility model.
Fig. 5 is the structural representation of the fender bracket of utility model.
Fig. 6 is the motion schematic diagram of cylindrical roller of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described: as shown in Figure 1-2, a kind of precision friction expansion core detent mechanism, by bearing pin 1, elastic expansion sleeve 2, retainer 3, cylindrical roller 4 and axle form with snap ring 5, it is characterized in that: bearing pin 1 front end is with tapering, elastic expansion sleeve 2 is sleeved on the front end of bearing pin 1, the endoporus of elastic expansion sleeve 2 also coordinates with bearing pin 1 with identical tapering and by n cylindrical roller 4, between bearing pin 1 and elastic expansion sleeve 2 endoporus, be inlaid with retainer 3, on retainer 3, be furnished with n cylindrical roller, and be evenly distributed on whole conical surface, cylindrical roller and bearing pin axis are 5-9 ゜ friction angle, axle is fixed in the annular groove of the bearing pin 1 front end conical surface with snap ring 5.
The diameter of described cylindrical roller is 3-8 of ∮ 5-80.
Bearing pin 1 front end is with tapering as shown in Figure 3-4, its tapering size is chosen as required within the scope of angle of friction, the endoporus of elastic expansion sleeve 2 is also had an effect with identical tapering and by n cylindrical roller 4 and bearing pin 1, cylindrical roller and bearing pin axis are 5-9 ゜ friction angle, its size is also chosen as required within the scope of angle of friction, and axle is used for ensureing that with snap ring 5 elastic expansion sleeve 2 and retainer 3 do not depart from the conical surface of bearing pin 1 front end all the time.
When use, elastic expansion sleeve 2 is inserted in locating hole with matching, then rotate counterclockwise bearing pin 1, at this moment cylindrical roller 4 can roll as shown in Figure 6 to large end along the conical surface of bearing pin 1 in rotating counterclockwise, in the nonslipping situation of pure rolling, frictional force will drive elastic expansion sleeve 2 also to large end motion, thereby by elastic expansion sleeve 2 distendings, the direct clearance of finally eliminating between elastic expansion sleeve 2 and locating hole completes location to swelling.
Claims (2)
1. a precision friction expansion core detent mechanism, by bearing pin, elastic expansion sleeve, retainer, cylindrical roller and axle form with snap ring, it is characterized in that: bearing pin front end is with tapering, elastic expansion sleeve is sleeved on the front end of bearing pin, the endoporus of elastic expansion sleeve also coordinates with bearing pin with identical tapering and by n cylindrical roller, between bearing pin and elastic expansion sleeve endoporus, be inlaid with retainer, on retainer, be furnished with n cylindrical roller, and be evenly distributed on whole conical surface, cylindrical roller and bearing pin axis are 5-9 ゜ friction angle, axle is fixed in the annular groove of the bearing pin front end conical surface with snap ring.
2. a kind of precision friction expansion core detent mechanism according to claim 1, the diameter that it is characterized in that described cylindrical roller is 3-8 of ∮ 5-80.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270924.9U CN203956773U (en) | 2014-05-26 | 2014-05-26 | Precision friction expansion core detent mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270924.9U CN203956773U (en) | 2014-05-26 | 2014-05-26 | Precision friction expansion core detent mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203956773U true CN203956773U (en) | 2014-11-26 |
Family
ID=51917409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420270924.9U Expired - Fee Related CN203956773U (en) | 2014-05-26 | 2014-05-26 | Precision friction expansion core detent mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203956773U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695371A (en) * | 2017-10-27 | 2018-02-16 | 中国航发南方工业有限公司 | A kind of fixture for lathe |
| CN107737962A (en) * | 2017-12-04 | 2018-02-27 | 宁波丰州机械有限公司 | Interior swollen chuck |
-
2014
- 2014-05-26 CN CN201420270924.9U patent/CN203956773U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695371A (en) * | 2017-10-27 | 2018-02-16 | 中国航发南方工业有限公司 | A kind of fixture for lathe |
| CN107737962A (en) * | 2017-12-04 | 2018-02-27 | 宁波丰州机械有限公司 | Interior swollen chuck |
| CN107737962B (en) * | 2017-12-04 | 2024-04-05 | 浙江丰州精密制造有限公司 | Internal expansion chuck |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141126 Termination date: 20150526 |
|
| EXPY | Termination of patent right or utility model |