CN2235871Y - Hand-tighting drill clamp - Google Patents
Hand-tighting drill clamp Download PDFInfo
- Publication number
- CN2235871Y CN2235871Y CN 95235357 CN95235357U CN2235871Y CN 2235871 Y CN2235871 Y CN 2235871Y CN 95235357 CN95235357 CN 95235357 CN 95235357 U CN95235357 U CN 95235357U CN 2235871 Y CN2235871 Y CN 2235871Y
- Authority
- CN
- China
- Prior art keywords
- drill body
- drill
- screw
- ring
- utility
- 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 hand-tightening drill clamp. The utility model is provided with a drill body, a clamping jaw, a screw nut, a front sleeve, and a rear sleeve, wherein the clamping jaw is arranged in the oblique round hole of the drill body; screwed joint is adopted between the screw nut and the clamping jaw; the front of the drill body is provided with the front sleeve; fixed connection is adapted between the screw nut and the front sleeve, and is also adapted between the back of the drill body and the rear sleeve; a rolling bearing is arranged between the middle of the drill body and the screw nut to overcome the disadvantage of the low efficiency of the torque transmission of the hand-tightening drill clamp. The utility model is applied to a manual electric drill.
Description
The utility model relates to machine tool accessories, especially a kind of hand fastening drill clutch.
Hand fastening drill clutch structure of the prior art is such: be provided with drill body, jaw, screw, protheca and back cover, three jaws are separately positioned in equally distributed three the oblique circular holes of its circumference of drill body upper edge, adopt thread connection between screw and the jaw, screw is made of two halves, hoop has steel ring on its cylindrical, the front end of drill body is mounted with protheca, drill body rear end and back cover, be interference fit joint between screw and the protheca, the rear end of oblique circular hole on drill body, the rear portion back-up ring is set on the drill body cylindrical, be provided with bearing between screw and rear portion back-up ring, this bearing is made of steel ball and retainer.Its shortcoming is: because bearing does not have raceway, and the direct contact friction in plane of steel ball and screw, rear portion back-up ring, so the moment of torsion transmission efficiency is low, the ensuring smooth transmission of drill chuck in clamping process is poor.
The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, and a kind of hand fastening drill clutch that is provided with the rolling bearing that is made of inner ring, outer ring and steel ball between drill body middle part and screw is provided.
The purpose of this utility model realizes by following scheme: be provided with drill body, jaw, screw, protheca and back cover, jaw is arranged in the oblique circular hole on the drill body, adopt thread connection between screw and the jaw, the front end of drill body is mounted with protheca, screw is quiet the connection with protheca, drill body rear end and between the back is overlapped, between drill body middle part and screw, be provided with rolling bearing, rolling bearing is made of inner ring, outer ring and steel ball, it is circular-arc that the cross section of inner ring and outer ring all is, and steel ball is arranged in the ring raceway that forms between inner ring and the outer ring.
Inner ring, outer ring and steel ball all are located in the shell.
The utility model is compared with the hand fastening drill clutch of prior art, and under equal conditions output torque has improved, and has improved drill chuck ensuring smooth transmission in clamping process simultaneously, has reduced the friction between member, has prolonged service life.
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the partial sectional view of rolling bearing of the present utility model.
With reference to Fig. 1, Fig. 2, the utility model is provided with drill body (1), jaw (5), screw (3), protheca (6) and back cover (7), drill body (1) rear end is provided with screwed hole, drill body (1) is drilled with an oblique circular hole along its end face circumference every 120 °, three jaws (5) all car have external screw thread and are arranged in the three oblique circular holes on the drill body (1), screw (3) is provided with internal thread, adopt thread connection between screw (3) and the jaw (5), screw (3) is made of two halves, hoop has steel ring (4) on its cylindrical, the front end of drill body (1) is mounted with protheca (6), drill body (1) rear end and back cover (7), be interference fit joint between screw (3) and the protheca (6), rolling bearing is by shell (10), inner ring (8), outer ring (9) and steel ball (2) constitute, inner ring (8) and outer ring (9) adopt the common straightcarbon steel flat cold-rolled sheet through being stamped to form, and handle through nitriding, it is circular-arc that their cross section all is, steel ball (2) is arranged in the ring raceway that forms between inner ring (8) and outer ring (9), inner ring (8), outer ring (9) and steel ball (2) all are located in the shell (10).
Claims (2)
1, a kind of hand fastening drill clutch, be provided with drill body (1), jaw (5), screw (3), protheca (6) and back cover (7), jaw (5) is arranged in the oblique circular hole on the drill body (1), adopt thread connection between screw (3) and the jaw (5), the front end of drill body (1) is mounted with protheca (6), screw (3) and protheca (6), drill body (1) rear end is overlapped with the back and is quiet the connection between (7), between drill body (1) middle part and screw (3), be provided with rolling bearing, it is characterized in that: rolling bearing is by inner ring (8), outer ring (9) and steel ball (2) constitute, the cross section of inner ring (8) and outer ring (9) all is circular-arc, and steel ball (2) is arranged in the ring raceway that forms between inner ring (8) and outer ring (9).
2, a kind of hand fastening drill clutch according to claim 1 is characterized in that: inner ring (8), outer ring (9) and steel ball (2) all are located in the shell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235357 CN2235871Y (en) | 1995-12-18 | 1995-12-18 | Hand-tighting drill clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235357 CN2235871Y (en) | 1995-12-18 | 1995-12-18 | Hand-tighting drill clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2235871Y true CN2235871Y (en) | 1996-09-25 |
Family
ID=33879047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95235357 Expired - Fee Related CN2235871Y (en) | 1995-12-18 | 1995-12-18 | Hand-tighting drill clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2235871Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003084700A1 (en) * | 2002-04-10 | 2003-10-16 | Cnina North Industries (Group) Corp Shanxi Huifeng Machinery Factory | A self-tightening keyless chuck |
-
1995
- 1995-12-18 CN CN 95235357 patent/CN2235871Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003084700A1 (en) * | 2002-04-10 | 2003-10-16 | Cnina North Industries (Group) Corp Shanxi Huifeng Machinery Factory | A self-tightening keyless chuck |
| GB2402356A (en) * | 2002-04-10 | 2004-12-08 | Shanxi Huifeng Power Tools Co | A self-tightening keyless chuck |
| GB2402356B (en) * | 2002-04-10 | 2005-08-17 | Shanxi Huifeng Power Tools Co | Self-tightening keyless chuck |
| US7246801B2 (en) | 2002-04-10 | 2007-07-24 | Shanxi Huifeng Power Tools Co., Ltd. | Self-tightening keyless chuck |
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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 |