CN203390235U

CN203390235U - Taper expansion mandrel

Info

Publication number: CN203390235U
Application number: CN201320391021.1U
Authority: CN
Inventors: 吴永旭; 姜娟; 杨小英; 张永泉
Original assignee: Shanghai East Pump Group Co Ltd
Current assignee: Shanghai East Pump Group Co Ltd
Priority date: 2013-07-02
Filing date: 2013-07-02
Publication date: 2014-01-15
Anticipated expiration: 2023-07-02

Abstract

The utility model discloses a taper expansion mandrel, which comprises a mandrel body and an expansion sleeve, wherein the expansion sleeve is provided with a through groove in the axial direction, the through groove can expand in the radial direction, the expansion sleeve is of a sleeve structure of which one end is provided with an opening, the mandrel body extends into the opening end of the expansion sleeve and extends out of the tail end of the expansion sleeve, the mandrel is in a cone shape, the extending-out part, positioned at the tail end of the expansion sleeve, of the mandrel body is provided with threads, the extending-out part is also sheathed with a nut, the inner wall of the expansion sleeve is in a cone shape corresponding to the shape of the mandrel body, the expansion sleeve can move relative to the mandrel body, and a spring is arranged between the interior of the expansion sleeve and the mandrel body. The taper expansion mandrel has the beneficial effect that the size is small, a great amount of manufacturing material is saved, the structure is simple, the convenience in use is realized, the positioning precision is high, and the processing precision and the processing efficiency of the workpiece are effectively improved.

Description

A kind of tapering built-up mandrel

Technical field

The utility model relates to a kind of positioning workpieces, specifically relates to a kind of tapering built-up mandrel.

Background technology

In machining, often need to carry out axle location, existing axle form is a lot, has cylindrical mandrel and spindle taper.

Be illustrated in figure 1 existing cylindrical mandrel, these cylindrical mandrel 2 one end are fixed by chuck 1, and the other end stretches in the hole to be positioned of workpiece 3, and pushes against fixing by clamp nut 4; This cylindrical mandrel 2 due to and the axle of workpiece 3 between total gapped existence, so positioning precision is low, and need Manual clamping mechanism, complex operation, inefficiency.

Be illustrated in figure 2 existing circular cone axle, this circular cone axle 7 one end are clamped by chuck 5, and the other end stretches into treating in internal point and treating that with this internal point inwall pushes against of workpiece 6; This circular cone axle 7, in order to guarantee positioning precision, has to reduce tapering, and the very long of design so the length of circular cone axle 7 is had to makes when operation, to use inconvenience, and waste material.

Utility model content

The purpose of this utility model is to provide a kind of tapering built-up mandrel, by adopting circular cone axle and an expansion sleeve mutually to push, thereby thereby evenly expand push against workpiece with internal point inwall, reach the object of centering, overcome the above-mentioned deficiency of existing cylinder, circular cone axle, thereby realized the purpose of this utility model.

The technical problem that the utility model solves can realize by the following technical solutions:

A built-up mandrel, comprises an axle and the expansion sleeve that is sheathed on this axle outside, on this expansion sleeve, offers vertically groove and can radially expand, wherein:

Expansion sleeve is the sheath structure of an end opening, and axle stretches into from the openend of this expansion sleeve, and stretches out from expansion sleeve end, and it is conical that this axle is, and it is offering screw thread from the extension of expansion sleeve end, is also arranged with nut on this extension;

Expansion sleeve inwall is the taper shape corresponding with this axle shape, and this expansion sleeve can relatively move with axle, and is also provided with a spring between expansion sleeve inside and axle.

In a preferred embodiment of the present utility model, expansion sleeve inwall offers a cell body along its radial section, and this cell body outside along the circumferential direction evenly offers some through holes that radially extend; Groove is corresponding with these lead to the hole site.

In a preferred embodiment of the present utility model, axle is provided with a mounting flange on the other end with respect to its extension.

In a preferred embodiment of the present utility model, the wall thickness of expansion sleeve reduces gradually along its opening direction.

The beneficial effects of the utility model are:

The utility model volume is little, can save in a large number making material; Simple in structure, easy to use and positioning precision is high, effectively improved machining accuracy and the working (machining) efficiency of workpiece.

Accompanying drawing explanation

Fig. 1 is the structural representation of cylindrical mandrel in prior art.

Fig. 2 is the structural representation of circular cone axle in prior art.

Fig. 3 is the profile of a kind of tapering built-up mandrel described in the utility model.

Fig. 4 is the cutaway view of the expansion sleeve part of a kind of tapering built-up mandrel described in the utility model.

Fig. 5 is the left view of Fig. 4.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the utility model.

As shown in Figure 3, the expansion sleeve 200 that a kind of tapering built-up mandrel described in the utility model comprises axle 100 and is sheathed on these axle 100 outsides, this expansion sleeve 200 expands outwardly expansion under the pushing of axle 100, and then pushes against the inwall for the treatment of internal point of workpiece 70.

Axle 100 comprises that a main body 120 and is located at the extension 110 in this main body 120, and wherein, main body 120 is a cone, and this cone compare little one end is fixedly connected with extension 110; Extension 110 is a uniform cylinder, on this extension 110, offers screw thread, and stretches out from being set in its outside expansion sleeve 200, and in its part outside expansion sleeve 200, cover has nut 111; Rotating this nut 111 can promote expansion sleeve 200 phase center rollers 100 and move.

The diameter of extension 110 is less than the minimum diameter of coupled main body 120, and extension 110 forms a stage body 121 with main body 120 junction; Between this stage body 121 and expansion sleeve 200 inwalls, be provided with a spring 50, this spring 50 is set on extension 110, and after expansion sleeve 200 phase center rollers 100 are moved, this spring 50 can make expansion sleeve 200 reset.

In addition, axle 100 is at the other end with respect to extension 110, and the left end in Fig. 3 is provided with mounting flange 130, when concrete operations, axle 100 is fixed on a pedestal by this mounting flange 130, and the axle 100 after 200 of expansion sleeves are fixed with respect to this oppositely relatively moves.

If Fig. 3 is in conjunction with as shown in Fig. 4, expansion sleeve 200 is the hollow sleeve of an end opening, and the inner wall shape of this expansion sleeve 200 is conical, and matches with main body 120 shapes of axle 100; The wall thickness of this expansion sleeve 200 reduces gradually along the openend of himself, and such arranging can make expansion sleeve 200 obtain elasticity to be increased; On expansion sleeve 200, offer vertically groove (not marking in figure).

End (the other end relative with openend, is right-hand member in Fig. 4) at expansion sleeve 200 offers a cell body 210, and this cell body 210 is offered with the inwall of expansion sleeve 200 and offered along the radial section of expansion sleeve 200.In the periphery of this cell body 210, also offer some along the circumferential direction equally distributed apertures 211, these apertures 211 radially cross-wise direction extend; The position of above-mentioned groove and these apertures 211 corresponding (as shown in Figure 5).

Cell body 210 and aperture 211 can reduce the wall thickness of whole expansion sleeve 200 to a certain extent, add and offer groove, make expansion sleeve 200 there is good elasticity, under the extruding of inner axle 100, can evenly expand outwardly, and then push against the inwall with internal point of workpiece 70.

The utility model is when concrete operations, first by mounting flange 130, axle 100 is fixing, sheathed good expansion sleeve 200 then, and now the extension 110 of axle 100 stretches out from the end of expansion sleeve 200; Fastening nut 111 gradually, promoting expansion sleeve 200 axle 100 inner with it pushes against mutually, now expansion sleeve 200 expands gradually under the taper seat effect of axle 100, and the band internal point inwall of the outer wall of expansion sleeve 200 and workpiece 70 pushes against mutually, and then reaches centering effect.Now, spring 50 is compressed.

After completing centering, while preparing to take off all parts of the present utility model, spring 50 can help to unclamp, separated expansion sleeve 200 and axle 100.

Due to aperture 211 and groove, all along the circumferential direction evenly offer, that is, expansion sleeve 200 can evenly expand, and has guaranteed centering precision.

Moreover whole device assembling is simple, has guaranteed that whole centering process is simply efficient, and has saved lot of materials with respect to existing circular cone axle.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a tapering built-up mandrel, comprises an axle, and the expansion sleeve that is sheathed on described axle outside, offers vertically groove and can radially expand on described expansion sleeve, it is characterized in that:

Described expansion sleeve is the sheath structure of an end opening, and axle stretches into from the openend of this expansion sleeve, and stretches out from expansion sleeve end, and it is conical that this axle is, and it is offering screw thread from the extension of expansion sleeve end, is also arranged with nut on described extension;

2. a kind of tapering built-up mandrel as claimed in claim 1, is characterized in that, described expansion sleeve inwall offers a cell body along its radial section, and described cell body outside along the circumferential direction evenly offers some through holes that radially extend; Groove is corresponding with these lead to the hole site.

3. a kind of tapering built-up mandrel as claimed in claim 1, is characterized in that, described axle is provided with a mounting flange on the other end with respect to its extension.

4. a kind of tapering built-up mandrel as claimed in claim 1, is characterized in that, the wall thickness of described expansion sleeve reduces gradually along its opening direction.