CN204639728U - Extension bar self-locking structure - Google Patents
Extension bar self-locking structure Download PDFInfo
- Publication number
- CN204639728U CN204639728U CN201520196032.3U CN201520196032U CN204639728U CN 204639728 U CN204639728 U CN 204639728U CN 201520196032 U CN201520196032 U CN 201520196032U CN 204639728 U CN204639728 U CN 204639728U
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- CN
- China
- Prior art keywords
- extension bar
- self
- nut
- locking
- main shaft
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of extension bar self-locking structure, it comprises: extension bar, and its rear portion is provided with the keyway coordinated with main shaft, and the front portion of this extension bar is provided with external screw thread; Extension bar nut, the external screw thread of the front portion of itself and described extension bar is connected, and is inserted into the length in described main shaft for the described extension bar of adjustment; The front end face of this extension bar nut is convexly equipped with the cone boss of a forward end convergent; And self-locking thread insert, the front portion of its inner chamber is provided with internal thread and is connected with the external screw thread of the front end with described main shaft, the middle part of the inner chamber of this self-locking thread insert is for holding described extension bar nut, and the front portion of the inner chamber of this self-locking thread insert is provided with the bellmouth corresponding with described cone boss.The utility model coordinates to achieve a butt joint the self-locking of bar by extension bar nut and self-locking thread insert, and its structure is simple, locks solid and reliable.
Description
Technical field
The utility model relates to extension bar field, particularly a kind of extension bar self-locking structure.
Background technology
The front-end of spindle of multi-drill, building-block machine needs with the first-class cutter of extension bar installing drill, when extension bar is installed on main shaft, the cylindrical of extension bar and the head endoporus matched in clearance of main shaft, and connect with transmitting torque by flat key, and the radial processing screw hole in front end of main shaft, extension bar cylindrical is axially provided with flat position, during installation, compress the flat position of extension bar be screwed into the screw of front-end of spindle with holding screw after, and by double nut, extension bar is locked at the front end face of main shaft, to realize extension bar fixing on main shaft.This extension bar is fixed on the structure on main shaft, owing to lacking auto-lock function, carry out in process, often occurring that holding screw gets loose at cutter, and extension bar can be caused slowly to skid off in the process in locking nut precession front-end of spindle face, cause amount of feeding when processing blind hole or the flat workpiece planarization of ream to increase, easily cause workpiece to scrap.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Utility model content
The purpose of this utility model is to provide a kind of extension bar self-locking structure, thus the connection overcoming existing main shaft and extension bar lacks the shortcoming of auto-lock function.
For achieving the above object, the utility model provides a kind of extension bar self-locking structure, wherein, comprising: extension bar, and its rear portion is provided with the keyway coordinated with main shaft, and the front portion of this extension bar is provided with external screw thread; Extension bar nut, the external screw thread of the front portion of itself and described extension bar is connected, and is inserted into the length in described main shaft for the described extension bar of adjustment; The front end face of this extension bar nut is convexly equipped with the cone boss of a forward end convergent; And self-locking thread insert, the front portion of its inner chamber is provided with internal thread and is connected with the external screw thread of the front end with described main shaft, the middle part of the inner chamber of this self-locking thread insert is for holding described extension bar nut, and the front portion of the inner chamber of this self-locking thread insert is provided with the bellmouth corresponding with described cone boss.
Preferably, in technique scheme, the external screw thread of the front portion of described extension bar is not identical with the externally threaded pitch of the front end of described main shaft.
Preferably, in technique scheme, the outside wall surface of described extension bar nut is the face of cylinder, and the sidewall of this extension bar nut is provided with the nut screwing clamping hole for coordinating with tightening tool.
Preferably, in technique scheme, the outside wall surface of described self-locking thread insert is the face of cylinder, and the swivel nut that the sidewall of this self-locking thread insert is provided with for coordinating with tightening tool tightens hole.
Compared with prior art, the utility model has following beneficial effect:
1, when the utility model is installed on extension bar on main shaft, the length in main shaft is inserted into by extension bar nut control extension bar, and the locking of the bar that undertaken coordinating achieving a butt joint by the bellmouth of self-locking thread insert and the cone boss of extension bar nut, its structure is simple, locks solid and reliable.
2, the external screw thread of extension bar front portion of the present utility model is not identical with the externally threaded pitch of front-end of spindle, can avoid driving extension bar nut rotation when tightening self-locking thread insert.
3, the outside wall surface of extension bar nut of the present utility model and self-locking thread insert is the face of cylinder but not hex surface, the external diameter size of extension bar nut and self-locking thread insert can be effectively reduced, its effect is when the multiple main shafts arranged parallel on same lathe using extension bar of the present utility model, the gap between each main shaft can be reduced, guarantee that multiple main shaft can rotate non-interferencely, and tightening tool easy to use installs extension bar.
Accompanying drawing explanation
Fig. 1 is the structural representation coordinated with main shaft according to extension bar self-locking structure of the present utility model.
Fig. 2 is the structural representation according to extension bar of the present utility model.
Fig. 3 is the structural representation according to extension bar nut of the present utility model.
Fig. 4 is the structural representation according to self-locking thread insert of the present utility model.
Main Reference Numerals illustrates:
1-main shaft; 2-flat key; 3-extension bar, 31-keyway; 4-extension bar nut, 41-cone boss, 42-nut screwing clamping hole; 5-self-locking thread insert, 51-bellmouth, 52-swivel nut tightens hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail, but is to be understood that protection domain of the present utility model not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole description and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other element or other part.
As shown in Figures 1 to 4, a kind of embodiment according to the utility model detailed description of the invention is: a kind of extension bar self-locking structure, it comprises: extension bar 3, extension bar nut 4 and self-locking thread insert 5, wherein: as depicted in figs. 1 and 2, the rear portion of extension bar 3 is provided with the keyway 31 coordinated with main shaft 1, and the front portion of this extension bar 3 is provided with external screw thread.As shown in figures 1 and 3, extension bar nut 4 is connected with the external screw thread of the front portion of extension bar 3, the particular location being screwed into the front portion of extension bar 3 by adjustment extension bar nut 4 controls extension bar 3 and is inserted into length in main shaft 1, can regulate to make the extension elongation of the cutter be installed on extension bar 3.And axial limiting can also be carried out to extension bar 3 by extension bar nut 4.Extension bar 3 is inserted into after in main shaft 1, and its keyway 31 is connected by flat key 2 and the keyway in the hole of main shaft 1, with transmitting torque.The front end face of extension bar nut 4 protrudes forward and is provided with a cone boss 41, and this cone boss 41 is by rear tapers forward.As shown in Figure 1 and Figure 4, the front portion of the inner chamber of self-locking thread insert 5 is provided with the internal thread corresponding with the external screw thread of the front end of main shaft 1, and self-locking thread insert is connected by the external screw thread of the front end of internal thread and main shaft 1 front end being fixed on main shaft 41.The middle part of the inner chamber of this self-locking thread insert 5 is for holding extension bar nut 4, and the front portion of the inner chamber of this self-locking thread insert 5 is provided with the bellmouth 51 corresponding with extension bar nut 3 front end cone boss 41, when self-locking thread insert 5 is tightened against the front end of main shaft 1, its bellmouth 51 compresses the cone boss 41 of extension bar nut 4, there is elastic deformation with radial compaction extension bar 3 in cone boss 41, prevents extension bar 3 from radial loosening occurring.Simultaneously bellmouth 51 pairs of cone bosses 41 produce axial thrust, make extension bar nut 4 fit tightly front end in main shaft 1, thus carry out axial restraint to extension bar 3, avoid extension bar 3 skid off forward and increase the amount of feeding of cutter.Preferably, the external screw thread of the front portion of extension bar 3 is not identical with the externally threaded pitch of the front end of main shaft 1, thus make extension bar nut 4 not identical with the connection of main shaft 1 with self-locking thread insert 5 with the connection of extension bar 3, avoid in the process of tightening self-locking thread insert 5, drive extension bar nut 4 to rotate, and cause changing extension bar 3 and be inserted into length in main shaft 1.Further preferably, the outside wall surface of extension bar nut 4 is the face of cylinder, and the sidewall symmetry of this extension bar nut 4 be provided with two nut screwing clamping holes 42 for coordinating with tightening tool.The outside wall surface of self-locking thread insert 5 is the face of cylinder, and the sidewall symmetry of this self-locking thread insert 5 is provided with two tightens hole 52 for the swivel nut coordinated with tightening tool.The outside wall surface of extension bar nut and self-locking thread insert is the face of cylinder but not hex surface, the external diameter size of extension bar nut and self-locking thread insert can be effectively reduced, when the multiple main shafts arranged parallel on same lathe using extension bar of the present utility model, the gap between each main shaft can be reduced, guarantee that multiple main shaft can rotate non-interferencely, and tightening tool easy to use installs extension bar of the present utility model.
The utility model does not need to arrange holding screw and on extension bar, process flat position, it compresses the cone boss 41 of extension bar nut 4 by the bellmouth 51 of self-locking thread insert 5, thus is locked to the axis of extension bar and radial direction simultaneously, and its locking is solid and reliable, and structure is simple, easily manufactured.
The aforementioned description to concrete exemplary of the present utility model is to illustrate and the object of illustration.These descriptions not want the utility model to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present utility model and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present utility model and various different selection and change.Scope of the present utility model is intended to limited by claims and equivalents thereof.
Claims (4)
1. an extension bar self-locking structure, is characterized in that, comprising:
Extension bar, its rear portion is provided with the keyway coordinated with main shaft, and the front portion of this extension bar is provided with external screw thread;
Extension bar nut, the external screw thread of the front portion of itself and described extension bar is connected, and is inserted into the length in described main shaft for the described extension bar of adjustment; The front end face of this extension bar nut is convexly equipped with the cone boss of a forward end convergent; And
Self-locking thread insert, the front portion of its inner chamber is provided with internal thread and is connected with the external screw thread of the front end with main shaft, the middle part of the inner chamber of this self-locking thread insert is for holding described extension bar nut, and the front portion of the inner chamber of this self-locking thread insert is provided with the bellmouth corresponding with described cone boss.
2. extension bar self-locking structure according to claim 1, is characterized in that, the external screw thread of the front portion of described extension bar is not identical with the externally threaded pitch of the front end of described main shaft.
3. extension bar self-locking structure according to claim 1 and 2, is characterized in that, the outside wall surface of described extension bar nut is the face of cylinder, and the sidewall of this extension bar nut is provided with the nut screwing clamping hole for coordinating with tightening tool.
4. extension bar self-locking structure according to claim 3, is characterized in that, the outside wall surface of described self-locking thread insert is the face of cylinder, and the swivel nut that the sidewall of this self-locking thread insert is provided with for coordinating with tightening tool tightens hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520196032.3U CN204639728U (en) | 2015-04-02 | 2015-04-02 | Extension bar self-locking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520196032.3U CN204639728U (en) | 2015-04-02 | 2015-04-02 | Extension bar self-locking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204639728U true CN204639728U (en) | 2015-09-16 |
Family
ID=54092511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520196032.3U Withdrawn - After Issue CN204639728U (en) | 2015-04-02 | 2015-04-02 | Extension bar self-locking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204639728U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759923A (en) * | 2015-04-02 | 2015-07-08 | 广西玉林达业机械配件有限公司 | Connecting rod self-locking structure |
| CN113134996A (en) * | 2021-05-17 | 2021-07-20 | 南京卓能机械设备有限公司 | Flat handle rope knurling draw gear |
-
2015
- 2015-04-02 CN CN201520196032.3U patent/CN204639728U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759923A (en) * | 2015-04-02 | 2015-07-08 | 广西玉林达业机械配件有限公司 | Connecting rod self-locking structure |
| CN113134996A (en) * | 2021-05-17 | 2021-07-20 | 南京卓能机械设备有限公司 | Flat handle rope knurling draw gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20170412 |
|
| AV01 | Patent right actively abandoned |