CN103212736A - Composite bearing for self-tightening drill chuck - Google Patents
Composite bearing for self-tightening drill chuck Download PDFInfo
- Publication number
- CN103212736A CN103212736A CN2013101360781A CN201310136078A CN103212736A CN 103212736 A CN103212736 A CN 103212736A CN 2013101360781 A CN2013101360781 A CN 2013101360781A CN 201310136078 A CN201310136078 A CN 201310136078A CN 103212736 A CN103212736 A CN 103212736A
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- China
- Prior art keywords
- axle bed
- bearing
- drill chuck
- leading
- composite
- 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.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 abstract 2
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C21/00—Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
- B23B31/1253—Jaws movement actuated by an axially movable member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/38—Keyless chucks for hand tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2260/00—Details of constructional elements
- B23B2260/008—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention belongs to the technical field of machinery, relates to a self-tightening drill chuck, and particularly relates to a composite bearing for the self-tightening drill chuck. The technical problems of being unreasonable and the like in the prior art are solved. The composite bearing comprises a cylindrical axle base, and the axle base is fixedly arranged between the radial direction of a main body and an integral type bearing guide part. A radial sliding bearing is arranged on the radial inner side of the composite bearing, and a thrust rolling bearing is arranged at the lower end of the composite bearing. Compared with the prior art, the composite bearing for the self-tightening drill chuck has the advantages of being reasonable in design and simple and compact in structure, the axle base is not only a bearing bush of the radial sliding bearing but also a race of the thrust rolling bearing, the composite bearing which is good in integrality and strong in rigidity is formed through positioning and connection by matching of the axle base and the integral type bearing guide part, stable bearing to the main body can be achieved, connecting strength is high, looseness can not happen, and connecting of parts is stable and reliable.
Description
Technical field
The invention belongs to field of mechanical technique, relate to keyless drill chuck, especially relate to a kind of composite bearing that is used for keyless drill chuck.
Background technology
Along with development of social productivity, the use of drill chuck is very extensive, employed bench drill, electric hand drill or lathe etc. mechanically all can need to carry out work with instruments such as drill chuck clamping drilling bit or cutters in industries such as machine-building, electronic apparatus, construction and installation, house decoration.Existing drill chuck has two types usually: a kind of is the Wrench-type drill chuck, the clamping force of this drill chuck depends on the moment that spanner applies, and clamping and pine needs aid when unloading drill bit, the use aid tightens or unclamps drill chuck and come installation or removal drill bit or cutter, operate cumbersomely, waste time and energy; Another kind is a self-tightening drill chuck.Self-tightening drill chuck utilizes the rotation after drill bit is installed by the principle of self-tightening, tightens drill bit or cutter by screw thread automatically, is easy to when instruments such as clamping drill bit or cutter.
Conventional keyless drill chuck generally includes main body, lock-screw, jaw, ball, end shield, jaw seat, end cap and ball lid.The ball cover cavity has a ring-shaped step, main body is a cylinder, an annular shaft shoulder is arranged on the periphery, a circle ball is distributing between the ring-shaped step of the annular shaft shoulder of main body and ball lid, main body is loaded in the pilot sleeve that is stitched together by ball lid and jaw seat, and this pilot sleeve is to be stitched together by the thread connection that end shield and ball cover.Being connected axle head with external equipment in main body has an end cap, mainly plays and rotates main body and prevent that the ball lid breaks away from subjective role.
Obviously, there is obvious defects in the globality aspect of existing drill chuck, and all part all depends on the thread connection situation of end shield and ball lid, loses end shield, and drill chuck just falls apart single-piece one by one.
Summary of the invention
The objective of the invention is at the problems referred to above, provide a kind of reasonable in design, simple and compact for structure, good integrity and can support the composite bearing that is used for keyless drill chuck of keyless drill chuck main body.
For achieving the above object, the present invention has adopted following technical proposal: the composite bearing that originally is used for keyless drill chuck, keyless drill chuck comprises cylindrical main body, main body is located in the tubular integral type guidance seat, the top of this integral type guidance seat is that cylindrical circular monoblock type is held the portion of leading, the bottom is the jaw rail portion that is taper barrel, it is characterized in that, this composite bearing comprises cylindrical circular axle bed, this axle bed be fixed on main body radially and monoblock type hold between the portion of leading, the composite bearing radially inner side is a radial plain bearing, and the lower end of composite bearing is a thrust bearing.
At the above-mentioned composite bearing that is used for keyless drill chuck, described radial plain bearing comprises that described axle bed and monoblock type hold the portion of leading, and described axle bed is fixed on monoblock type and holds in the portion of leading; The annular shaft shoulder and described monoblock type that described thrust bearing comprises described axle bed, plurality of balls, be arranged on the main body are held the portion of leading, and described ball is arranged between the axle bed lower end and the annular shaft shoulder.Among the present invention, monoblock type is held the significant components that the portion of leading is two bearings, is again the key contact member of two bearings, and furtherly, described monoblock type is held the portion of leading with the synthetic overall structure of two bearing group.
At the above-mentioned composite bearing that is used for keyless drill chuck, described monoblock type is held and is provided with ring-shaped step in the portion of leading, the described annular shaft shoulder is positioned on the periphery of main body, the described annular shaft shoulder is arranged on the ring-shaped step, be provided with described plurality of balls between described axle bed bottom and the annular shaft shoulder top and ball contacts with annular shaft shoulder top with the axle bed bottom respectively, described axle bed is inboard for being arranged on the trunnion of main body periphery and the bearing shell that monoblock type is held the radial plain bearing between the portion of leading, described axle bed lower end is the seat ring of thrust bearing, and described annular shaft shoulder top is the blowout patche of thrust bearing.
At the above-mentioned composite bearing that is used for keyless drill chuck, the upper surface of described axle bed flushes substantially with the upper surface that monoblock type is held the portion of leading.
At the above-mentioned composite bearing that is used for keyless drill chuck, described monoblock type is held the portion upper inner of leading and is provided with the connecting thread section, above the connecting thread section, be provided with positioning step, the described axle bed outside is provided with the axle bed thread segment, above the axle bed thread segment, be provided with the location division of radially protruding, described connecting thread section is threaded with the axle bed thread segment, and described location division is embedded in positioning step.
At the above-mentioned composite bearing that is used for keyless drill chuck, described positioning step and location division tight fit.
At the above-mentioned composite bearing that is used for keyless drill chuck, described axle bed lower end has the ring-type arcuate groove, described annular shaft shoulder top has last planar annular, described plurality of balls is arranged between ring-type arcuate groove and the last planar annular, and plurality of balls contacts with the ring-type arcuate groove with last planar annular respectively.
At the above-mentioned composite bearing that is used for keyless drill chuck, the upper surface of described axle bed is provided with at least two fabrication holes, and described fabrication hole is symmetrically distributed at circumferencial direction.
At the above-mentioned composite bearing that is used for keyless drill chuck, described going up between planar annular and the trunnion is provided with annular oil storage tank.
Compared with prior art, originally the advantage that is used for the composite bearing of keyless drill chuck is: reasonable in design, simple and compact for structure, axle bed is the bearing shell of radial plain bearing, is again the seat ring of thrust bearing, the screw thread tight fit that process axle bed and monoblock type are held the portion of leading is located by connecting, constitute a good integrity, composite bearing that rigidity is strong, can stably support main body, and the bonding strength height, can not cause looseningly, the connection between each parts is reliable and stable.
Description of drawings
Fig. 1 is that keyless drill chuck provided by the invention partly cuts open structural representation.
Fig. 2 is the structural representation that partly cuts open provided by the invention.
Among the figure, main body 1, lock-screw 2, jaw 3, monoblock type are held the portion of leading 4, jaw rail portion 5, guide groove 6, end shield 7, ring-shaped step 8, the annular shaft shoulder 9, axle bed 10, ball 11, trunnion 12, radial plain bearing 13, thrust bearing 14, connecting thread section 16, positioning step 17, axle bed thread segment 18, location division 19, ring-type arcuate groove 20, are gone up planar annular 21, fabrication hole 22, elastic cover 23, integral type guidance seat 24, annular oil storage tank 25.
The specific embodiment
As illustrated in fig. 1 and 2, keyless drill chuck comprises parts such as main body 1, lock-screw 2, jaw 3, end shield 7, axle bed 10, ball 11, elastic cover 23, integral type guidance seat 24.More particularly, keyless drill chuck comprises cylindrical main body 1, and main body 1 is located in the tubular integral type guidance seat 24, and the top of this integral type guidance seat 24 is that cylindrical circular monoblock type is held the portion of leading 4, and the bottom is the jaw rail portion 5 that is taper barrel.That is, integral type guidance seat 24 is divided into monoblock type and holds the portion of leading 4 and 5 two functions of jaw rail portion, and monoblock type holds the portion of leading 4 and jaw rail portion 5 is integral structure.Originally the composite bearing that is used for keyless drill chuck is the keyless drill chuck part, comprise cylindrical circular axle bed 10, this axle bed 10 be fixed on main body 1 radially and monoblock type hold between the portion of leading 4, the composite bearing radially inner side is a radial plain bearing 13, and the lower end of composite bearing is a thrust bearing 14.
Radial plain bearing 13 comprises that described axle bed 10 and monoblock type hold the portion of leading 4, and axle bed 10 is fixed on monoblock type and holds in the portion of leading 4.The annular shaft shoulder 9 and described monoblock type that thrust bearing 14 comprises described axle bed 10, plurality of balls 11, be arranged on the main body 1 are held the portion of leading 4, and ball 11 is arranged between axle bed 10 lower ends and the annular shaft shoulder 9.Particularly, monoblock type is held and is provided with ring-shaped step 8 in the portion of leading 4, and the annular shaft shoulder 9 is positioned on the periphery of main body 1, and the annular shaft shoulder 9 is arranged on the ring-shaped step 8.Be provided with above-mentioned plurality of balls 11 between axle bed 10 bottoms and the annular shaft shoulder 9 tops and ball 11 contacts with the annular shaft shoulder 9 tops with axle bed 10 bottoms respectively, described axle bed 10 inboards are for being arranged on the trunnion 12 of main body 1 periphery and the bearing shell that monoblock type is held the radial plain bearing 13 between the portion of leading 4, described axle bed 10 lower ends are the seat ring of thrust bearing 14, and the described annular shaft shoulder 9 tops are the blowout patche of thrust bearing 14.The upper surface of axle bed 10 flushes substantially with the upper surface that monoblock type is held the portion of leading 4.Axle bed 10 lower ends have ring-type arcuate groove 20, the annular shaft shoulder 9 tops have last planar annular 21, plurality of balls 11 is arranged between ring-type arcuate groove 20 and the last planar annular 21, and plurality of balls 11 contacts with ring-type arcuate groove 20 with last planar annular 21 respectively.
Monoblock type is held the portion's of leading 4 upper inner and is provided with connecting thread section 16, above connecting thread section 16, be provided with positioning step 17, described axle bed 10 outsides are provided with axle bed thread segment 18, above axle bed thread segment 18, be provided with the location division 19 of radially protruding, described connecting thread section 16 is threaded with axle bed thread segment 18, and described location division 19 is embedded in positioning step 17.Positioning step 17 and location division 19 tight fits.
Form, lubricate, be convenient to store dirt simultaneously for the ease of the carrying oil film, the present invention is provided with annular oil storage tank 25 between last planar annular 21 and trunnion 12.The carrying oil film here is meant the carrying oil film that is formed on radial plain bearing 13 and thrust bearing 14.The upper surface of axle bed 10 is provided with at least two fabrication holes 22, and described fabrication hole 22 is symmetrically distributed at circumferencial direction.Fabrication hole 22 is convenient to the installation of elastic cover 23, thereby easily keyless drill chuck is operated.
Among the present invention, axle bed 10 is the bearing shell of radial plain bearing 13, it is again the seat ring of thrust bearing 14, the tight fit of holding the portion of leading 4 through axle bed 10 and monoblock type is located by connecting, constitute a good integrity, composite bearing that rigidity is strong, can stably support main body 1, and the bonding strength height, can not cause looseningly, the connection between each parts is reliable and stable.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used main body 1, lock-screw 2, jaw 3, monoblock type to hold the portion of leading 4, jaw rail portion 5, guide groove 6, end shield 7, ring-shaped step 8, the annular shaft shoulder 9, axle bed 10, ball 11, trunnion 12, radial plain bearing 13, thrust bearing 14, connecting thread section 16, positioning step 17, axle bed thread segment 18, location division 19, ring-type arcuate groove 20, go up terms such as planar annular 21, fabrication hole 22, elastic cover 23, integral type guidance seat 24, annular oil storage tank 25 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (9)
1. composite bearing that is used for keyless drill chuck, keyless drill chuck comprises cylindrical main body (1), main body (1) is located in the tubular integral type guidance seat (24), the top of this integral type guidance seat (24) is that cylindrical circular monoblock type is held the portion of leading (4), the bottom is the jaw rail portion (5) that is taper barrel, it is characterized in that, this composite bearing comprises cylindrical circular axle bed (10), this axle bed (10) be fixed on main body (1) radially and monoblock type hold between the portion of leading (4), the composite bearing radially inner side is a radial plain bearing (13), and the lower end of composite bearing is a thrust bearing (14).
2. the composite bearing that is used for keyless drill chuck according to claim 1, it is characterized in that, described radial plain bearing (13) comprises that described axle bed (10) and monoblock type hold the portion of leading (4), and described axle bed (10) is fixed on monoblock type and holds in the portion of leading (4); The annular shaft shoulder (9) and described monoblock type that described thrust bearing (14) comprises described axle bed (10), plurality of balls (11), be arranged on the main body (1) are held the portion of leading (4), and described ball (11) is arranged between axle bed (10) lower end and the annular shaft shoulder (9).
3. the composite bearing that is used for keyless drill chuck according to claim 2, it is characterized in that, described monoblock type is held and is provided with ring-shaped step (8) in the portion of leading (4), the described annular shaft shoulder (9) is positioned on the periphery of main body (1), the described annular shaft shoulder (9) is arranged on the ring-shaped step (8), be provided with above-mentioned plurality of balls (11) between described axle bed (10) bottom and the annular shaft shoulder (9) top and ball (11) contacts with the annular shaft shoulder (9) top with axle bed (10) bottom respectively, described axle bed (10) is inboard for being arranged on the trunnion (12) of main body (1) periphery and the bearing shell that monoblock type is held the radial plain bearing (13) between the portion of leading (4), described axle bed (10) lower end is the seat ring of thrust bearing (14), and the described annular shaft shoulder (9) top is the blowout patche of thrust bearing (14).
4. according to claim 1 or the 2 or 3 described composite bearings that are used for keyless drill chuck, it is characterized in that the upper surface of described axle bed (10) flushes substantially with the upper surface that monoblock type is held the portion of leading (4).
5. according to claim 1 or the 2 or 3 described composite bearings that are used for keyless drill chuck, it is characterized in that, described monoblock type is held the portion of leading (4) upper inner and is provided with connecting thread section (16), be provided with positioning step (17) in the top of connecting thread section (16), described axle bed (10) outside is provided with axle bed thread segment (18), be provided with the location division (19) of radially protruding in the top of axle bed thread segment (18), described connecting thread section (16) is threaded with axle bed thread segment (18), and described location division (19) are embedded in positioning step (17).
6. the composite bearing that is used for keyless drill chuck according to claim 5 is characterized in that, described positioning step (17) and location division (19) tight fit.
7. the composite bearing that is used for keyless drill chuck according to claim 3, it is characterized in that, described axle bed (10) lower end has ring-type arcuate groove (20), the described annular shaft shoulder (9) top has last planar annular (21), described plurality of balls (11) is arranged between ring-type arcuate groove (20) and the last planar annular (21), and plurality of balls (11) contacts with ring-type arcuate groove (20) with last planar annular (21) respectively.
8. the composite bearing that is used for keyless drill chuck according to claim 7 is characterized in that, described going up between planar annular (21) and the trunnion (12) is provided with annular oil storage tank (25).
9. according to claim 1 or the 2 or 3 described composite bearings that are used for keyless drill chuck, it is characterized in that the upper surface of described axle bed (10) is provided with at least two fabrication holes (22), described fabrication hole (22) is symmetrically distributed at circumferencial direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136078.1A CN103212736B (en) | 2013-04-18 | 2013-04-18 | Composite bearing for keyless drill chuck |
| PCT/CN2014/075751 WO2014169854A1 (en) | 2013-04-18 | 2014-04-18 | Composite bearing for self-tightening drill chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136078.1A CN103212736B (en) | 2013-04-18 | 2013-04-18 | Composite bearing for keyless drill chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103212736A true CN103212736A (en) | 2013-07-24 |
| CN103212736B CN103212736B (en) | 2016-07-13 |
Family
ID=48811071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310136078.1A Active CN103212736B (en) | 2013-04-18 | 2013-04-18 | Composite bearing for keyless drill chuck |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103212736B (en) |
| WO (1) | WO2014169854A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169854A1 (en) * | 2013-04-18 | 2014-10-23 | You Yihua | Composite bearing for self-tightening drill chuck |
| CN109441947A (en) * | 2018-08-27 | 2019-03-08 | 重庆斯凯迪轴瓦有限公司 | One kind preventing eccentric wear internal combustion engine bearing |
| CN111805260A (en) * | 2020-08-01 | 2020-10-23 | 周凤妹 | Cutter clamping mechanism of numerically controlled fraise machine |
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| JPH1113754A (en) * | 1997-06-19 | 1999-01-22 | Okuma Mach Works Ltd | Bearing device |
| CN1562541A (en) * | 2004-03-19 | 2005-01-12 | 游友民 | Self-tightening type drill chuck in modified structure |
| CN2683288Y (en) * | 2004-03-19 | 2005-03-09 | 游友民 | Self fastened drill chuck with improved structure |
| CN101586619A (en) * | 2009-06-26 | 2009-11-25 | 西安交通大学 | Sliding-rolling composite bearing device |
| CN203265722U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Composite bearing for self-tightening drill chuck |
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| DE1002170B (en) * | 1955-06-07 | 1957-02-07 | Froriep Gmbh Maschf | Storage of spindles, journals or the like for roller or slide bearings that simultaneously absorb radial and axial forces |
| CN2701558Y (en) * | 2004-04-29 | 2005-05-25 | 三鸥集团有限公司 | Improved hand tighten drill chuck |
| CN101100005B (en) * | 2007-06-29 | 2010-04-14 | 游友民 | Elastic cover for drill clamping head |
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| CN103212739B (en) * | 2013-04-18 | 2016-12-28 | 玉环胜友工具有限公司 | Double main supporting type self-fastening drill chunk |
| CN203316800U (en) * | 2013-04-18 | 2013-12-04 | 玉环胜友工具有限公司 | Connecting structure for drill chuck main body and locking screw |
| CN203265720U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Self-tight drill chuck integral type bearing guide assembly |
| CN103212736B (en) * | 2013-04-18 | 2016-07-13 | 玉环胜友工具有限公司 | Composite bearing for keyless drill chuck |
| CN203265718U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Double main bearing type self-tightening drill chuck |
| CN203265717U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Connecting structure for shaft seat and integrated guide bearing seat of self-fastening drill chuck |
| CN103212737B (en) * | 2013-04-18 | 2016-08-31 | 玉环胜友工具有限公司 | Keyless drill chuck axle bed and the attachment structure of integrated guide bearing |
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2013
- 2013-04-18 CN CN201310136078.1A patent/CN103212736B/en active Active
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2014
- 2014-04-18 WO PCT/CN2014/075751 patent/WO2014169854A1/en active Application Filing
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| JPH1113754A (en) * | 1997-06-19 | 1999-01-22 | Okuma Mach Works Ltd | Bearing device |
| CN1562541A (en) * | 2004-03-19 | 2005-01-12 | 游友民 | Self-tightening type drill chuck in modified structure |
| CN2683288Y (en) * | 2004-03-19 | 2005-03-09 | 游友民 | Self fastened drill chuck with improved structure |
| CN101586619A (en) * | 2009-06-26 | 2009-11-25 | 西安交通大学 | Sliding-rolling composite bearing device |
| CN203265722U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Composite bearing for self-tightening drill chuck |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169854A1 (en) * | 2013-04-18 | 2014-10-23 | You Yihua | Composite bearing for self-tightening drill chuck |
| CN109441947A (en) * | 2018-08-27 | 2019-03-08 | 重庆斯凯迪轴瓦有限公司 | One kind preventing eccentric wear internal combustion engine bearing |
| CN111805260A (en) * | 2020-08-01 | 2020-10-23 | 周凤妹 | Cutter clamping mechanism of numerically controlled fraise machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103212736B (en) | 2016-07-13 |
| WO2014169854A1 (en) | 2014-10-23 |
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