CN2246555Y - Chuck of self-holding drill - Google Patents
Chuck of self-holding drill Download PDFInfo
- Publication number
- CN2246555Y CN2246555Y CN 95235358 CN95235358U CN2246555Y CN 2246555 Y CN2246555 Y CN 2246555Y CN 95235358 CN95235358 CN 95235358 CN 95235358 U CN95235358 U CN 95235358U CN 2246555 Y CN2246555 Y CN 2246555Y
- Authority
- CN
- China
- Prior art keywords
- jaw seat
- jaw
- overcoat
- main body
- seat
- 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-fastening drill chuck, aiming at overcoming the disadvantage of poor positioning accuracy of an outer sleeve of a self-fastening drill chuck in the prior art. An outer sleeve of the utility model is in screw connection with a clamping jaw seat; the outer sleeve is caused to be accurately positioned by the utility model depending on one end face on the clamping jaw seat. The utility model is suitable for matching with a metal cutting machine tool to use.
Description
The utility model relates to machine tool accessories, especially a kind of keyless drill chuck.
The structure of keyless drill chuck of the prior art is such: be provided with back cover, main body, the jaw seat, overcoat, lock-screw and jaw, it between body front end and the lock-screw thread connection, back cover is provided with an opening, back cover is installed in body rear, back cover passes through a screw lock on main body, in back cover, there is lid jaw seat endoporus rear end with thread connection, be provided with steel ball in the annular ditch groove that forms between the front end face of lid and the main body boss, three jaws are placed in equally distributed three grooves of its front end cone of jaw seat upper edge, jaw connects with the equally distributed "T"-shaped groove of lock-screw head end by the boss of its rear end simultaneously, be thread connection between overcoat and the jaw seat, overcoat is realized its location on the jaw seat by the cylindrical of screw thread front end on the jaw seat, its shortcoming is: gapped between the cylindrical of jaw seat and the overcoat endoporus, make the positioning accuracy of overcoat poor, can not guarantee the jaw holding workpiece well.
The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, provides and adopts thread connection between a kind of jaw seat and the overcoat, also makes the pinpoint a kind of keyless drill chuck of overcoat by the end face on the jaw seat.
The purpose of this utility model takes following scheme to realize: the utility model is provided with back cover, main body, the jaw seat, overcoat, lock-screw and jaw, it between the endoporus of main body and jaw seat matched in clearance, it between body front end and the lock-screw thread connection, it between body rear and the back cover interference fit joint, in back cover, the jaw base rear end is provided with lid, be provided with steel ball in the annular ditch groove that the front end face of lid and main body convex platform form, jaw is placed in the groove on the jaw seat, the jaw rear end connects with lock-screw simultaneously, be thread connection between overcoat and the jaw seat, overcoat by and the jaw seat between thread connection and the end face on the jaw seat realize its location on the jaw seat.
In addition, the end face that cooperates with overcoat on the jaw seat is 0.01mm with respect to the squareness tolerance value of jaw seat inner hole centreline, and thread center's line that the jaw seat connects with overcoat is 0.02mm with respect to the axiality tolerance value of jaw seat inner hole centreline.
The body rear cylindrical reaches and the back cover endoporus of its interference fit joint is equipped with straight knurling.
Jaw seat of the present utility model has removed the cylindrical that the screw thread front end cooperates with overcoat, with the end face on thread connection and the jaw seat outer being enclosed within on the jaw seat is located, simplify the structure, and overcoat positioning accuracy height, the jaw holding workpiece is firmly, reliably.
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
With reference to accompanying drawing, the utility model is provided with back cover (1), main body (4), jaw seat (5), overcoat (6), lock-screw (8) and jaw (9), for left hand thread connects, lock-screw (8) is provided with the pad (7) that collides between buffering lock-screw (8) and the main body (4) between main body (4) front end and the lock-screw (8).Main body (4) rear end cylindrical reaches and back cover (1) endoporus of its interference fit joint is equipped with straight knurling, thereby back cover (1) connects firmly with main body (4).In back cover (1), there is lid (2) jaw seat (5) endoporus rear end with thread connection, is matched in clearance between lid (2) endoporus and the main body (4), cover in the annular ditch groove that forms between the front end face of (2) and main body (4) convex platform and be provided with steel ball (3).Three jaws (9) are placed in equally distributed three grooves of 40 ° of cones of its front end of jaw seat (5) upper edge, and jaw (9) connects with equally distributed three "T"-shaped grooves on lock-screw (8) head end respectively by the boss of its rear end simultaneously.Between overcoat (6) and the jaw seat (5) is thread connection, overcoat (6) by and jaw seat (5) between thread connection and the end face (10) on the jaw seat (5) realize its location on jaw seat (5), the end face (10) that jaw seat (5) upward cooperates with overcoat (6) is 0.01mm with respect to the squareness tolerance value of jaw seat (5) inner hole centreline, and thread center's line that jaw seat (5) connects with overcoat (6) is 0.02mm with respect to the axiality tolerance value of jaw seat (5) inner hole centreline.40 ° of female cone holes of overcoat (6) contact with the arc surfaced top of jaw (9), make jaw (9) be subjected to radial constraint, and the angle of jaw (9) moving direction and jaw seat (5) inner hole centreline is 20 °.
The utility model is when workpiece loading and unloading, grasp back cover (1), main body (4) is not rotated, rotary sleeve (6), thereby jaw seat (5) is rotated, jaw (9) rotates with jaw seat (5) simultaneously, driving lock-screw (8) by jaw (9) rotates, lock-screw (8) is moved axially along main body (4) inner hole centreline, drive jaw (9) and move, thereby clamp or unclamp workpiece along the groove on the jaw seat (5), in working angles, cutting force increases, and makes when jaw (9) is micro-to rotate, and jaw (9) will drive lock-screw (8) trace and rotate, lock-screw (8) moves axially, make jaw (9) clamping work pieces, the clamping force that makes jaw (9) increases with the increase of cutting force, and workpiece is further clamped.
Claims (3)
1, a kind of keyless drill chuck, be provided with back cover (1), main body (4), jaw seat (5), overcoat (6), lock-screw (8) and jaw (9), be matched in clearance between the endoporus of main body (4) and jaw seat (5), between main body (4) front end and the lock-screw (8) is thread connection, between main body (4) rear end and the back cover (1) is interference fit joint, in back cover (1), jaw seat (5) rear end is provided with lid (2), be provided with steel ball (3) in the annular ditch groove that forms between the front end face of lid (2) and the boss on the main body (4), jaw (9) is placed in the groove on the jaw seat (5), jaw (9) rear end connects with lock-screw (8) simultaneously, between overcoat (6) and the jaw seat (5) is thread connection, it is characterized in that: overcoat (6) by and jaw seat (5) between thread connection and the end face (10) on the jaw seat (5) install and to be positioned on the jaw seat (5).
2, a kind of keyless drill chuck according to claim 1, it is characterized in that: the end face (10) that jaw seat (5) cooperates with overcoat (6) is 0.01mm with respect to the squareness tolerance value of jaw seat (5) inner hole centreline, and thread center's line that jaw seat (5) connects with overcoat (6) is 0.02mm with respect to the axiality tolerance value of jaw seat (5) inner hole centreline.
3, a kind of keyless drill chuck according to claim 1 and 2 is characterized in that: main body (4) rear end cylindrical reaches and back cover (1) endoporus of its interference fit joint is equipped with straight knurling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235358 CN2246555Y (en) | 1995-12-18 | 1995-12-18 | Chuck of self-holding drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235358 CN2246555Y (en) | 1995-12-18 | 1995-12-18 | Chuck of self-holding drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2246555Y true CN2246555Y (en) | 1997-02-05 |
Family
ID=33879048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95235358 Expired - Fee Related CN2246555Y (en) | 1995-12-18 | 1995-12-18 | Chuck of self-holding drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2246555Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100564904C (en) * | 2008-02-05 | 2009-12-02 | 游友民 | Drill clamping chuck self-tightening screw nail and preparation method thereof |
-
1995
- 1995-12-18 CN CN 95235358 patent/CN2246555Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100564904C (en) * | 2008-02-05 | 2009-12-02 | 游友民 | Drill clamping chuck self-tightening screw nail and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |