CN202192506U - Live center for ejecting workpiece - Google Patents
Live center for ejecting workpiece Download PDFInfo
- Publication number
- CN202192506U CN202192506U CN2011202922759U CN201120292275U CN202192506U CN 202192506 U CN202192506 U CN 202192506U CN 2011202922759 U CN2011202922759 U CN 2011202922759U CN 201120292275 U CN201120292275 U CN 201120292275U CN 202192506 U CN202192506 U CN 202192506U
- Authority
- CN
- China
- Prior art keywords
- ball bearing
- workpiece
- housing
- taper shank
- radial ball
- 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 live center for ejecting a workpiece, which includes a taper shank (1), a housing (2) connected with the taper shank (1) and a center shaft (3), wherein a cavity is defined by the taper shank (1), the housing (2) and the center shaft (3); a conical roller ball bearing (4) connected with the center shaft (3) and a single-row radial ball bearing (5) connected with the housing (2) are arranged in the cavity; and the conical roller ball bearing (4) is connected with the single-row radial ball bearing (5). By adopting the structure, the live center for ejecting the workpiece ha a simple structure, is easy to realize, and can improve the machining precision of the workpiece when the live center is used for machining the workpiece.
Description
Technical field
The utility model relates to a kind of auxiliary equipment of grinding, specifically is the live center that is used to hold workpiece.
Background technology
Heavy and large-scale workpiece much can not satisfy the demand of expection after typing is processed into; Usually people overcome its existing problem through workpiece being carried out grinding, and people are carrying out ground with large-scale workpiece and mainly exist top mill and holder to grind dual mode heavy now, wherein; The advantage that adopts holder mill mode is that grinding accuracy is high, steady quality; But for the workpiece of tens of tons of weights, carriage and tray bear bigger load for a long time, produce temperature rise; Cause workpiece dimension restive, the carriage adjustment is complicated.
Adopt the top of top mill mode can adopt back dead centre or live center: adopting back dead centre is positioning reference with the center hole, workpiece jack-up revolution grinding, and axial force and radial load that back dead centre bears are bigger; So to top very high with required precision center hole, in several hours the course of work, the rotation that workpiece does not stop; To produce violent friction between top and center hole; And the frictional heat that produces in the friction process will make and produce deformation between back dead centre and the center hole, thereby cause workpiece to scrap, because of the center hole problem of quality; Center hole is repaired unavoidably, if there is not to repair the workpiece quality that will influence processing; Live center can overcome the deficiency of back dead centre, however the bearing unreasonable allocation of existing live center, top when work circular runout bigger, thereby can have influence on the machining accuracy of workpiece.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of live center that is used to hold workpiece that can improve the workpiece machining accuracy is provided.
The purpose of the utility model mainly realizes through following technical scheme: be used to hold the live center of workpiece, comprise taper shank, the housing that is connected with taper shank and tail spindle; Constitute cavity between said taper shank, housing and the tail spindle three, be provided with the taper roller ball bearing that is connected with tail spindle in this cavity, and the single-row radial ball bearing that is connected with housing, and the taper roller ball bearing is connected with single-row radial ball bearing.Wherein, Taper shank preferably adopts the Morse's cone body; The purpose that the utility model is provided with cavity is to be convenient to carry out ccontaining to single-row radial ball bearing and taper roller ball bearing; And the cavity inner wall that tail spindle, taper shank and housing constitute can carry out spacing to single-row radial ball bearing and taper roller ball bearing, thus the bigger skew of generation when avoiding single-row radial ball bearing and taper roller ball bearing stressed.
Be provided with radial ball bearing in the described taper shank.Wherein, Radial ball bearing can bear the load of different sizes in high-speed motion; Its rolling bearing is made up of complete accurate ball, retainer and Internal and external cycle, and the rolling element of radial ball bearing is a ball, and the utility model is when work; Ball is done and the adaptive matched motion of workpiece, thereby further improves machining accuracy.
Be connected with the end cap of enclosed cavity between said housing and the tail spindle.The utility model is through being provided with end cap, its enclosed cavity, thus can avoid taper roller ball bearing and single-row radial ball bearing in the cavity to come off.
The utility model compared with prior art has the following advantages and beneficial effect: the utility model is provided with the taper roller ball bearing that is connected with tail spindle; And the single-row radial ball bearing that is connected with housing; Tail spindle, taper shank and housing constitute cavity; When adopting the utility model that workpiece is positioned, taper roller ball bearing and single-row radial ball bearing adapt to the motion of workpiece through interacting, and wearing and tearing are each other compensated; Cavity inner wall can limit the scope of beating of single-row radial ball bearing and taper roller ball bearing, thereby improves the machining accuracy of workpiece.
Description of drawings
Fig. 1 is the half section structural representation of the utility model embodiment.
The pairing name of Reference numeral is called in the accompanying drawing: 1, taper shank, 2, housing, 3, tail spindle, 4, the taper roller ball bearing, 5, single-row radial ball bearing, 6, radial ball bearing, 7, end cap.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify, but the embodiment of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1, the utility model comprises taper shank 1, housing 2 and tail spindle 3, and wherein, housing 2 all is connected with taper shank 1 with tail spindle 3, and the taper shank 1 of the utility model is set to cylindrical shape, and housing 2 is arranged with on the taper shank 1.Be provided with radial ball bearing 6 in the taper shank 1 of the utility model; Constitute cavity between taper shank 1, housing 2 and tail spindle 3 threes; Be provided with taper roller ball bearing 4 and single-row radial ball bearing 5 in this cavity, taper roller ball bearing 4 is connected with tail spindle 3, and single-row radial ball bearing 5 is connected with housing 2; And taper roller ball bearing 4 is connected with single-row radial ball bearing 5; As preferably, the other ends that the utility model taper roller ball bearing 4 connects tail spindle 3 ends relatively are connected with single-row radial ball bearing 5, and the other ends of single-row radial ball bearing 5 relative connection housing 2 ends are connected with taper roller ball bearing 4.
As stated, then can well realize the utility model.
Claims (3)
1. be used to hold the live center of workpiece, it is characterized in that: comprise taper shank (1), the housing (2) that is connected with taper shank (1) and tail spindle (3); Constitute cavity between said taper shank (1), housing (2) and tail spindle (3) three; Be provided with the taper roller ball bearing (4) that is connected with tail spindle (3) in this cavity; And the single-row radial ball bearing (5) that is connected with housing (2), and taper roller ball bearing (4) is connected with single-row radial ball bearing (5).
2. the live center that is used to hold workpiece according to claim 1 is characterized in that: be provided with radial ball bearing (6) in the described taper shank (1).
3. the live center that is used to hold workpiece according to claim 1 and 2 is characterized in that: the end cap (7) that is connected with enclosed cavity between said housing (2) and the tail spindle (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202922759U CN202192506U (en) | 2011-08-12 | 2011-08-12 | Live center for ejecting workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202922759U CN202192506U (en) | 2011-08-12 | 2011-08-12 | Live center for ejecting workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202192506U true CN202192506U (en) | 2012-04-18 |
Family
ID=45947437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202922759U Expired - Fee Related CN202192506U (en) | 2011-08-12 | 2011-08-12 | Live center for ejecting workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202192506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274986A (en) * | 2011-08-12 | 2011-12-14 | 成都科盛石油科技有限公司 | Revolving center used for supporting workpiece |
-
2011
- 2011-08-12 CN CN2011202922759U patent/CN202192506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102274986A (en) * | 2011-08-12 | 2011-12-14 | 成都科盛石油科技有限公司 | Revolving center used for supporting workpiece |
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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: 20120418 Termination date: 20120812 |