CN103212736B - Composite bearing for keyless drill chuck - Google Patents
Composite bearing for keyless drill chuck Download PDFInfo
- Publication number
- CN103212736B CN103212736B CN201310136078.1A CN201310136078A CN103212736B CN 103212736 B CN103212736 B CN 103212736B CN 201310136078 A CN201310136078 A CN 201310136078A CN 103212736 B CN103212736 B CN 103212736B
- Authority
- CN
- China
- Prior art keywords
- axle bed
- bearing
- drill chuck
- leading
- monoblock type
- 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.)
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Links
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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 field of mechanical technique, relate to keyless drill chuck, especially relate to a kind of composite bearing for keyless drill chuck.It solve prior art and design the technical problems such as not reasonable.This composite bearing includes cylindrical circular axle bed, and this axle bed is fixed on main body radial direction and monoblock type is held between the portion of leading, and composite bearing radially inner side is a radial plain bearing, and the lower end of composite bearing is a thrust bearing.Compared with prior art, this is in that for the advantage of the composite bearing of keyless drill chuck: 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 holding the portion of leading through axle bed and monoblock type is located by connecting, constitute a good integrity, composite bearing that rigidity is strong, it is possible to stably main body is supported, and bonding strength is high, not resulting in loosening, the stable connection between each parts is 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 for keyless drill chuck.
Background technology
Development along with social productive forces, the use of drill chuck is widely, bench drill, electric hand drill or the lathe etc. that use in the industries such as machine-building, electronic apparatus, construction and installation, house decoration mechanically, all can need to clamp the instrument such as drill bit or cutter with drill chuck and be operated.Existing drill chuck generally has two types: one is spanner-type drill chuck, the clamping force of this drill chuck depends on the moment that spanner applies, and need aid when clamping and loose unloading drill bit, aid is used to tighten or unclamp drill chuck to install or remove drill bit or cutter, operate cumbersome, waste time and energy；Another kind is self-tightening drill chuck.The self-tightening drill chuck principle by self-tightening, the rotation after utilizing drill bit to install, tighten drill bit or cutter automatically by screw thread, be easy to when the instrument such as drill bit or cutter of clamping.
Conventional keyless drill chuck generally includes main body, lock-screw, jaw, ball, end shield, jaw seat, end cap and ball lid.Ball cover cavity has a ring-shaped step, main body is a cylinder, periphery has an annular shaft shoulder, it is dispersed with a circle ball between the annular shaft shoulder and the ring-shaped step of ball lid of main body, main body is loaded in the pilot sleeve being stitched together by ball lid and jaw seat, and this pilot sleeve is to be stitched together by the thread connection of end shield Yu ball lid.It is connected axle head in main body with external equipment and has an end cap, primarily serve rotation main body and prevent ball lid from departing from subjective role.
Obviously, there is obvious defect in the globality aspect of existing drill chuck, and whole parts all rely on the thread connection situation of end shield and ball lid, lose end shield, and drill chuck just falls apart into single-piece one by one.
Summary of the invention
It is an object of the invention to for the problems referred to above, it is provided that a kind of reasonable in design, simple and compact for structure, good integrity and the composite bearing for keyless drill chuck of keyless drill chuck main body can be supported.
For reaching above-mentioned purpose, present invention employs following technical proposal: this is for the composite bearing of keyless drill chuck, keyless drill chuck includes cylindrical main body, main body is located in tubular integrated guide bearing, the top of this integrated guide bearing is that cylindrical circular monoblock type holds the portion of leading, bottom is the jaw rail portion in taper barrel, it is characterized in that, this composite bearing includes cylindrical circular axle bed, this axle bed is fixed on main body radial direction and monoblock type is held between the portion of leading, composite bearing radially inner side is a radial plain bearing, the lower end of composite bearing is a thrust bearing.
In the above-mentioned composite bearing for keyless drill chuck, described radial plain bearing includes described axle bed and monoblock type holds the portion of leading, and described axle bed is fixed on monoblock type and holds in the portion of leading；Described thrust bearing includes described axle bed, some balls, the annular shaft shoulder being arranged in main body and described monoblock type and holds the portion of leading, and described ball is arranged between axle bed lower end and the annular shaft shoulder.In the present invention, monoblock type holds the significant components that the portion of leading is two bearings, is again the key contact component of two bearings, and furtherly, described monoblock type is held the portion of leading and two bearing group are synthesized an overall structure.
In the above-mentioned composite bearing 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 ring-shaped step, be provided with between described axle bed bottom and annular shaft shoulder top described some balls and ball respectively with axle bed bottom and annular shaft shoulder upper contact, for being arranged on the trunnion of main body periphery and monoblock type holds the bearing shell of the radial plain bearing between the portion of leading inside described axle bed, the described seat ring that axle bed lower end is thrust bearing, described annular shaft shoulder top is the blowout patche of thrust bearing.
In the above-mentioned composite bearing for keyless drill chuck, the upper surface of described axle bed and monoblock type are held the upper surface in the portion of leading and are substantially flush.
In the above-mentioned composite bearing for keyless drill chuck, described monoblock type is held the portion upper inner of leading and is provided with connection thread segment, connect thread segment be arranged over positioning step, axle bed thread segment it is provided with outside described axle bed, the location division being arranged over radially protruding at axle bed thread segment, described connection thread segment is threadeded with axle bed thread segment, and described location division is embedded in positioning step.
In the above-mentioned composite bearing for keyless drill chuck, described positioning step and location division tight fit.
In the above-mentioned composite bearing for keyless drill chuck, described axle bed lower end has ring-type arcuate groove, described annular shaft shoulder top has upper planar annular, described some balls are arranged between ring-type arcuate groove and upper planar annular, and some balls respectively with upper planar annular and ring-type arc raceway contact.
In the above-mentioned composite bearing for keyless drill chuck, the upper surface of described axle bed is provided with at least two fabrication hole, and described fabrication hole is symmetrical at circumferencial direction.
In the above-mentioned composite bearing for keyless drill chuck, between described upper planar annular and trunnion, it is provided with annular oil storage tank.
Compared with prior art, this is in that for the advantage of the composite bearing of keyless drill chuck: 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 holding the portion of leading through axle bed and monoblock type is located by connecting, constitute a good integrity, composite bearing that rigidity is strong, it is possible to stably main body is supported, and bonding strength is high, not resulting in loosening, the stable connection between each parts is reliable.
Accompanying drawing explanation
Fig. 1 is that keyless drill chuck provided by the invention partly cuts open structural representation.
Fig. 2 provided by the invention partly cuts open structural representation.
In 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, are connected thread segment 16, positioning step 17, axle bed thread segment 18, location division 19, ring-type arcuate groove 20, upper planar annular 21, fabrication hole 22, elastic cover 23, integrated guide bearing 24, annular oil storage tank 25.
Detailed description of the invention
As illustrated in fig. 1 and 2, keyless drill chuck includes the parts such as main body 1, lock-screw 2, jaw 3, end shield 7, axle bed 10, ball 11, elastic cover 23, integrated guide bearing 24.More specifically, keyless drill chuck includes cylindrical main body 1, and main body 1 is located in tubular integrated guide bearing 24, and the top of this integrated guide bearing 24 is that cylindrical circular monoblock type holds the portion of leading 4, and bottom is the jaw rail portion 5 in taper barrel.That is, integrated guide bearing 24 is divided into monoblock type to hold 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 type structure.This is keyless drill chuck ingredient for the composite bearing of keyless drill chuck, including cylindrical circular axle bed 10, this axle bed 10 is fixed on main body 1 radial direction and monoblock type is held between the portion of leading 4, and 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 includes described axle bed 10 and monoblock type holds the portion of leading 4, and axle bed 10 is fixed on monoblock type and holds in the portion of leading 4.Thrust bearing 14 includes described axle bed 10, some balls 11, arrange the annular shaft shoulder 9 on the body 1 and described monoblock type holds the portion of leading 4, and ball 11 is arranged between axle bed 10 lower end and the annular shaft shoulder 9.Specifically, 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 ring-shaped step 8.Be provided with between axle bed 10 bottom and the annular shaft shoulder 9 top above-mentioned some balls 11 and ball 11 respectively with axle bed 10 bottom and the annular shaft shoulder 9 upper contact, for being arranged on the trunnion 12 of main body 1 periphery and monoblock type holds the bearing shell of the radial plain bearing 13 between the portion of leading 4 inside described axle bed 10, the described seat ring that axle bed 10 lower end is thrust bearing 14, the described blowout patche that the annular shaft shoulder 9 top is thrust bearing 14.The upper surface of axle bed 10 and monoblock type are held the upper surface in the portion of leading 4 and are substantially flush.Axle bed 10 lower end has ring-type arcuate groove 20, and the annular shaft shoulder 9 top has upper planar annular 21, and some balls 11 are arranged between ring-type arcuate groove 20 and upper planar annular 21, and some balls 11 contact with upper planar annular 21 and ring-type arcuate groove 20 respectively.
Monoblock type is held the portion of leading 4 upper inner and is provided with connection thread segment 16, connect thread segment 16 be arranged over positioning step 17, it is provided with axle bed thread segment 18 outside described axle bed 10, the location division 19 being arranged over radially protruding at axle bed thread segment 18, described connection thread segment 16 is threadeded 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 fit.
Being formed for the ease of carrying oil film, lubricate, simultaneously facilitate storage dirt, the present invention is provided with annular oil storage tank 25 between upper planar annular 21 and trunnion 12.Here carrying oil film refers to and forms the carrying oil film at radial plain bearing 13 and thrust bearing 14.The upper surface of axle bed 10 is provided with at least two fabrication hole 22, and described fabrication hole 22 is symmetrical at circumferencial direction.Fabrication hole 22 is easy to the installation of elastic cover 23, thus easily keyless drill chuck being operated.
In the present invention, axle bed 10 is the bearing shell of radial plain bearing 13, it it is again the seat ring of thrust bearing 14, the tight fit 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, it is possible to stably main body 1 is supported, and bonding strength is high, not resulting in loosening, the stable connection between each parts is reliable.
Specific embodiment described herein is only to present invention spirit explanation for example.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount the scope that appended claims is defined.
Although more employ main body 1 herein, 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, are connected the terms such as thread segment 16, positioning step 17, axle bed thread segment 18, location division 19, ring-type arcuate groove 20, upper planar annular 21, fabrication hole 22, elastic cover 23, integrated guide bearing 24, annular oil storage tank 25, but be not precluded from using the probability of other term.These terms are used to be only used to describe and explain more easily the essence of the present invention；It is all contrary with spirit of the present invention for being construed as any additional restriction.
Claims (7)
1. the composite bearing for keyless drill chuck, keyless drill chuck includes cylindrical main body (1), main body (1) is located in tubular integrated guide bearing (24), the top of this integrated guide bearing (24) is that cylindrical circular monoblock type holds the portion of leading (4), bottom is the jaw rail portion (5) in taper barrel, it is characterized in that, this composite bearing includes cylindrical circular axle bed (10), this axle bed (10) is fixed on main body (1) radial direction and monoblock type is held between the portion of leading (4), composite bearing radially inner side is a radial plain bearing (13), the lower end of composite bearing is a thrust bearing (14)；Described radial plain bearing (13) includes described axle bed (10) and monoblock type holds the portion of leading (4), and described axle bed (10) is fixed on monoblock type and holds in the portion of leading (4)；Described thrust bearing (14) includes described axle bed (10), some balls (11), the annular shaft shoulder (9) being arranged in main body (1) and described monoblock type and holds the portion of leading (4), and described ball (11) is arranged between axle bed (10) lower end and the annular shaft shoulder (9)；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 ring-shaped step (8), be provided with between described axle bed (10) bottom and the annular shaft shoulder (9) top above-mentioned some balls (11) and ball (11) respectively with axle bed (10) bottom and the annular shaft shoulder (9) upper contact, the bearing shell of the radial plain bearing (13) between the portion of leading (4) is held in described axle bed (10) inner side for the trunnion (12) and monoblock type being arranged on main body (1) periphery, the described seat ring that axle bed (10) lower end is thrust bearing (14), the described blowout patche that the annular shaft shoulder (9) top is thrust bearing (14).
2. the composite bearing for keyless drill chuck according to claim 1, it is characterised in that the upper surface of described axle bed (10) and monoblock type are held the upper surface in the portion of leading (4) and be substantially flush.
3. the composite bearing for keyless drill chuck according to claim 1, it is characterized in that, described monoblock type is held the portion of leading (4) upper inner and is provided with connection thread segment (16), connect thread segment (16) be arranged over positioning step (17), described axle bed (10) outside is provided with axle bed thread segment (18), the location division (19) being arranged over radially protruding at axle bed thread segment (18), described connection thread segment (16) is threadeded with axle bed thread segment (18), described location division (19) is embedded in positioning step (17).
4. the composite bearing for keyless drill chuck according to claim 3, it is characterised in that described positioning step (17) and location division (19) tight fit.
5. the composite bearing for keyless drill chuck according to claim 1 or 2 or 3 or 4, 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 upper planar annular (21), described some balls (11) are arranged between ring-type arcuate groove (20) and upper planar annular (21), and some balls (11) contact with upper planar annular (21) and ring-type arcuate groove (20) respectively.
6. the composite bearing for keyless drill chuck according to claim 5, it is characterised in that be provided with annular oil storage tank (25) between described upper planar annular (21) and trunnion (12).
7. the composite bearing for keyless drill chuck according to claim 5, it is characterized in that, the upper surface of described axle bed (10) is provided with at least two fabrication hole (22), and described fabrication hole (22) is symmetrical 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 CN103212736A (en) | 2013-07-24 |
| CN103212736B true 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212736B (en) * | 2013-04-18 | 2016-07-13 | 玉环胜友工具有限公司 | Composite bearing for keyless drill chuck |
| CN109441947B (en) * | 2018-08-27 | 2022-07-01 | 重庆和天机械集团有限公司 | Internal combustion engine bearing bush capable of preventing eccentric wear |
| CN111805260A (en) * | 2020-08-01 | 2020-10-23 | 周凤妹 | Cutter clamping mechanism of numerically controlled fraise machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201067810Y (en) * | 2007-06-29 | 2008-06-04 | 游友民 | Elastic cover for drill chuck |
| CN101585091A (en) * | 2008-05-20 | 2009-11-25 | 周光 | Self-tightening conveniently removing drill chuck |
| CN103212738B (en) * | 2013-04-18 | 2016-12-28 | 玉环胜友工具有限公司 | Keyless drill chuck monoblock type is held and is led assembly |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN203265721U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Self-tight drill chuck shaft seat |
| CN103212740B (en) * | 2013-04-18 | 2016-08-31 | 玉环胜友工具有限公司 | Keyless drill chuck axle bed |
| CN103212736B (en) * | 2013-04-18 | 2016-07-13 | 玉环胜友工具有限公司 | Composite bearing for keyless drill chuck |
| CN203265719U (en) * | 2013-04-18 | 2013-11-06 | 玉环胜友工具有限公司 | Connecting structure for end shield and integrated guide bearing seat of drill chuck |
-
2013
- 2013-04-18 CN CN201310136078.1A patent/CN103212736B/en active Active
-
2014
- 2014-04-18 WO PCT/CN2014/075751 patent/WO2014169854A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014169854A1 (en) | 2014-10-23 |
| CN103212736A (en) | 2013-07-24 |
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