CN202291477U - Self-centering locking mandrel - Google Patents
Self-centering locking mandrel Download PDFInfo
- Publication number
- CN202291477U CN202291477U CN 201120446939 CN201120446939U CN202291477U CN 202291477 U CN202291477 U CN 202291477U CN 201120446939 CN201120446939 CN 201120446939 CN 201120446939 U CN201120446939 U CN 201120446939U CN 202291477 U CN202291477 U CN 202291477U
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- CN
- China
- Prior art keywords
- mandrel
- self
- oil
- thin
- centering locking
- 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
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Abstract
The utility model discloses a self-centering locking mandrel, which comprises a mandrel body and a thin-wall tube sleeved on the mandrel body. An oil cavity is axially arranged at the outer end face of the mandrel body, and a plurality of oil passages penetrating through the thin-wall tube and the oil cavity are symmetrically arranged on the mandrel body along the radial direction. The self-centering locking mandrel further comprises a spiral plug in sealing match with the oil cavity. The basic principle is that the thin-wall sleeve is expanded through pressure of oil (usually engine oil with high viscosity), and when the thin-wall sleeve is expanded to be enough large, friction force is generated between the thin-wall sleeve of the mandrel body and a hole, so that the mandrel body and components are locked together, and gaps are simultaneously eliminated. The shortcoming of taper expanding mandrels is overcome, and the self-centering locking mandrel is free of limitation of mandrel space positions or assembling modes and is higher in positioning accuracy, easier and more convenient in operation and wider in using range.
Description
Technical field
The utility model relates to a kind of mechanical fastening device, particularly a kind of locking mandrel of hi-Fix.
Background technology
At mechanical field, normally used positioning core axle is to confirm the positioning accuracy of part or anchor clamps by the hole precision of processing with the axle precision, and just the more little positioning accuracy in gap of cooperation is high more.Adopt this method location, high position precision and effect just must cause the raising of part processing cost if seek out more, if consider that the more inhomogeneous effect of clamping force will seek out high positioning accuracy again and can not realize.
In the prior art,, under some specific occasion, there is the wealthy mandrel that rises of utilization tapering to eliminate fit clearance for obtaining higher positioning accuracy.Its principle is that the mutual motion by tapering mandrel and tapering ringfeder makes the ringfeder spreading or dwindles; When the even spreading of ringfeder is enough big, can eliminate the gap in ringfeder and hole; Ringfeder makes between ringfeder and the hole for the normal pressure of hole wall and produces frictional force when ringfeder continues wealthy rising again, thereby mandrel is locked on the part and does not need to apply in addition clamping force.Adopt this mode can obtain high orientation precision, still, the shortcoming of this mode is that tapering mandrel and tapering ringfeder space must be arranged; The position of the tapering mandrel and the tapering ringfeder application of force; Must be ringfeder motion and mandrel is inactive in addition exactly, just mandrel be fixed, and part up overlaps; Compress tapered sleeve again, use restricted greatly.
To above-mentioned deficiency, need a kind of new hi-Fix mandrel of research and development, make it when satisfying the hi-Fix requirement, can not receive the qualification of locational space and fit etc., applied widely.
The utility model content
In view of this, the purpose of the utility model provides a kind of self-centering locking mandrel, when making it satisfy hi-Fix, does not receive the qualification of mandrel locus or fit, enlarges the scope of application.
The purpose of the utility model realizes through following technical scheme: a kind of self-centering locking mandrel; Comprise mandrel and be set in the light-wall pipe on the mandrel; Be provided with oil pocket vertically from the mandrel outer face, mandrel upper edge radial symmetric is provided with the oil duct of many perforation light-wall pipes and oil pocket; Also comprise the vice that is sealed and matched with oil pocket.
Further, the both sides that are positioned at oil duct on the mandrel are arranged with O-ring seal;
Further, said sealing ring is a rubber seal;
Further, said oil duct is many and along the circumferential direction evenly distributes.
The beneficial effect of the utility model: the self-centering locking mandrel of the utility model comprises mandrel and is set in the light-wall pipe on the mandrel that be provided with oil pocket vertically from the mandrel outer face, mandrel upper edge radial symmetric is provided with the oil duct of many perforation light-wall pipes and oil pocket; Also comprise the vice that is sealed and matched with oil pocket.Basic principle is: lean on the pressure of oil (using the higher machine oil of viscosity usually) to make thin-walled cover spreading, when spreading mandrel thin-walled when enough big overlaps generation frictional force between the hole and mandrel and part is locked at eliminated the gap simultaneously; Overcome the shortcoming of the wealthy mandrel that rises of tapering, do not received the qualification of mandrel locus or fit, higher than its positioning accuracy, to operate easylier, the scope of application is wider.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the contour structures sketch map of the utility model;
Fig. 2 be among Fig. 1 A-A to cutaway view.
The specific embodiment
Fig. 1 is the contour structures sketch map of the utility model; Fig. 2 be among Fig. 1 A-A to cutaway view.As shown in the figure: the self-centering locking mandrel of present embodiment comprises mandrel 1 and is set in the light-wall pipe 5 on the mandrel that be provided with oil pocket 2 vertically from the mandrel outer face, mandrel upper edge radial symmetric is provided with the oil duct 3 of many perforation light-wall pipes 5 and oil pocket 2; Also comprise the vice 4 that is sealed and matched with oil pocket.During use; Inject the higher machine oil of viscosity in the oil pocket, mandrel is pre-loaded into parts after, the adjustable screw plug; Oil chamber volume is reduced; Oil pressure increases in the oil pocket, and then wealthy bloated thin-walled cover deforms it, when spreading mandrel thin-walled when enough big overlaps generation frictional force between the hole and mandrel and part is locked at eliminated the gap simultaneously; Overcome the shortcoming of the wealthy mandrel that rises of tapering, do not received the qualification of mandrel locus or fit, higher than its positioning accuracy, to operate easylier, the scope of application is wider.
As the further improvement to the foregoing description, the both sides that are positioned at oil duct on the mandrel are arranged with O-ring seal 6.Adopt rubber seal in the present embodiment.Sealing ring is set helps further improving the sealing in oil pocket and the oil duct, prevent between mandrel and the light-wall pipe leakage of oil to take place and cause losing efficacy.
As the further improvement to the foregoing description, said oil duct 3 is many, and along the circumferential direction evenly distributes.Present embodiment is provided with 4 or 8 oil ducts, distributes symmetrically, and it is stressed evenly to guarantee that thin-walled is enclosed within circumferencial direction, realizes self-centering purpose.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technical scheme of the utility model; And not breaking away from the aim and the scope of the utility model technical scheme, it all should be encompassed in the middle of the claim scope of the utility model.
Claims (4)
1. mandrel is locked in a self-centering; It is characterized in that: comprise mandrel (1) and be set in the light-wall pipe (5) on the mandrel; Be provided with oil pocket (2) vertically from the mandrel outer face, mandrel upper edge radial symmetric is provided with the oil duct (3) of many perforation light-wall pipes (5) and oil pocket (2); Also comprise the vice (4) that is sealed and matched with oil pocket.
2. self-centering locking mandrel according to claim 1, it is characterized in that: the both sides that are positioned at oil duct on the mandrel are arranged with O-ring seal (6).
3. self-centering locking mandrel according to claim 2, it is characterized in that: said sealing ring is a rubber seal.
4. according to the arbitrary described self-centering locking mandrel of claim 1-3, it is characterized in that: said oil duct (3) is many and evenly distribution along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120446939 CN202291477U (en) | 2011-11-14 | 2011-11-14 | Self-centering locking mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120446939 CN202291477U (en) | 2011-11-14 | 2011-11-14 | Self-centering locking mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202291477U true CN202291477U (en) | 2012-07-04 |
Family
ID=46360457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120446939 Expired - Fee Related CN202291477U (en) | 2011-11-14 | 2011-11-14 | Self-centering locking mandrel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202291477U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033300A (en) * | 2015-09-02 | 2015-11-11 | 南方风机股份有限公司 | Liquid plastic clamp special for thin-wall shaft sleeve |
| CN105458317A (en) * | 2015-12-02 | 2016-04-06 | 四川凌峰航空液压机械有限公司 | Hydraulic tensioning clamping mandrel for thin-wall shaft sleeve |
| CN105690046A (en) * | 2016-04-21 | 2016-06-22 | 重庆大学 | Double-disk simple supporting mechanism processing tooling and fine processing method |
-
2011
- 2011-11-14 CN CN 201120446939 patent/CN202291477U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033300A (en) * | 2015-09-02 | 2015-11-11 | 南方风机股份有限公司 | Liquid plastic clamp special for thin-wall shaft sleeve |
| CN105458317A (en) * | 2015-12-02 | 2016-04-06 | 四川凌峰航空液压机械有限公司 | Hydraulic tensioning clamping mandrel for thin-wall shaft sleeve |
| CN105690046A (en) * | 2016-04-21 | 2016-06-22 | 重庆大学 | Double-disk simple supporting mechanism processing tooling and fine processing method |
| CN105690046B (en) * | 2016-04-21 | 2018-11-27 | 重庆大学 | Double-arc spline freely-supported mechanism processing tool and its method for fine finishing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20131114 |