CN102343447A - Novel self-tightened drill chuck - Google Patents

Novel self-tightened drill chuck Download PDF

Info

Publication number
CN102343447A
CN102343447A CN2011102608840A CN201110260884A CN102343447A CN 102343447 A CN102343447 A CN 102343447A CN 2011102608840 A CN2011102608840 A CN 2011102608840A CN 201110260884 A CN201110260884 A CN 201110260884A CN 102343447 A CN102343447 A CN 102343447A
Authority
CN
China
Prior art keywords
drill chuck
nut
provided
thread
screw mandrel
Prior art date
Application number
CN2011102608840A
Other languages
Chinese (zh)
Other versions
CN102343447B (en
Inventor
柳尧亭
于庆滋
Original Assignee
威海达旺五金制品有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 威海达旺五金制品有限责任公司 filed Critical 威海达旺五金制品有限责任公司
Priority to CN201110260884.0A priority Critical patent/CN102343447B/en
Publication of CN102343447A publication Critical patent/CN102343447A/en
Application granted granted Critical
Publication of CN102343447B publication Critical patent/CN102343447B/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02Chucks
    • B23B31/10Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/1253Jaws movement actuated by an axially movable member
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2260/00Details of constructional elements
    • B23B2260/138Screw threads

Abstract

The invention discloses a novel self-tightened drill chuck, which solves the technical problem that the automatic clamping force is influenced because a push screw rod and a push nut are too tight or too loose easily and a lock spring plate is easy to rub with an inner hole thereof in the prior art. The novel self-tightened drill chuck is provided with a drill chuck body and a clamp claw, wherein the drill chuck body is provided with a clamp claw hole, and the clamp claw is arranged in the clamp claw hole; and the drill chuck is also provided with a push screw rod and a push nut, wherein the outer surface of the push screw rod is provided with a thread which is matched with a thread on the inner surface of the push nut, and the push nut is connected with the clamp claw. The novel self-tightened drill chuck is characterized in that: a lead angle alpha between the thread on the outer surface of the push screw rod and the thread on the inner surface of the push nut is not less than 2 DEG and not more than 8 DEG. The novel self-tightened drill chuck has the advantages of large and continuously-maintained clamping force, high precision and high stability and can be widely used for production operation.

Description

A kind of new-type keyless drill chuck

Technical field

The present invention relates to a kind of anchor clamps, is a kind of new-type keyless drill chuck specifically.

Background technology

In activity in production, need often to use operations such as instruments such as lathe, electric drill are holed, milling.Be installed in the drill chuck that is used for cutters such as clamping drilling bit, milling cutter on these tool host working shafts and experienced long-term application and improvement, obtained significant progress.

Date of declaration is on August 19th, 2009; Notification number is that the Chinese invention patent of CN 201291311Y discloses a kind of self-tightening drill chuck; It comprises the drill chuck body; Three smooth surfaces are not established the jaw of screw thread; Promote screw mandrel and promote nut; The upper end of drill chuck body is processed with and promotes the connecting hole of screw mandrel lower end external diameter coupling; The lower end that promotes screw mandrel is movably set in the said connecting hole; Be provided with the stopping means that prevents that both break away between drill chuck body and the said promotion screw mandrel; The outer surface that promotes screw mandrel is processed with screw thread; Promoting nut is rotatably connected on the promotion screw mandrel; The lower end, outer that promotes nut is processed with three open groove; The upper end of three jaws is provided with the plush copper with the open recess coupling; Plush copper is movably set in the corresponding opening groove; This product has the function of automatic clamp-on tool; Chucking power is big, and precision is high with stability, and is simultaneously simple in structure; In light weight; Be easy to processing and miniaturization, production cost is low, is convenient to promote the use of.

But,, promote screw mandrel and promote to occur tension easily between the nut and stuck or cross pine and insecure technical problem according to the disclosed technical scheme of this patent of invention; Simultaneously, the locking spring leaf easily and its endoporus generation rubs and the normal formation of clamping force automatically of influence.

Summary of the invention

One of technical problem to be solved by this invention is to promote screw mandrel in the prior art and promote between the nut too tight or too loose easily; Two of technical problem to be solved is easy and its endoporus generation friction and normal automatic clamping forces of influence of locking spring leaf.

For solving the problems of the technologies described above; The present invention provides a kind of new-type keyless drill chuck; It is provided with drill chuck body and jaw; The drill chuck body is provided with the jaw hole; Jaw is located in the jaw hole; Drill chuck also is provided with and promotes screw mandrel and promote nut; The outer surface that promotes screw mandrel is provided with screw thread; It is complementary with the screw thread that promotion nut inner surface is provided with; Promote nut and be connected with jaw, said promotion screw mandrel outer surface thread with the scope of the lead angle α that promotes nut inner surface screw thread is: 2 °≤α≤8 °.

Optimized technical scheme of the present invention is: the scope that promotes screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 3 ° 48 '≤α≤6 ° 44 '.

The further optimized technical scheme of the present invention is: the scope that promotes screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 4 ° 48 '≤α≤5 ° 47 '.

The further again optimized technical scheme of the present invention is: also be provided with locking device on the drill chuck, locking device comprises the locking spring leaf, promotes to be provided with spring between nut and the locking spring leaf.

The present invention further optimized technical scheme is: said spring is the turriform spring.

In the technical scheme of the present invention, under the prerequisite that the remainder structure is confirmed, promoting the screw mandrel outer surface thread is one of key that realizes technique effect of the present invention with the value that promotes nut inner surface thread helix lift angle α.If the value of α is too small, promote screw mandrel and promote will be in the tension state between the nut, stuck easily; And if the value of α is excessive, promote screw mandrel and promote will be in loose state between the nut, it is unreliable to connect.The present invention since choose reasonable promote screw mandrel outer surface thread and the value that promotes nut inner surface thread helix lift angle, promote screw mandrel and promote to be in suitable connection status between the nut thereby make, be not prone to tension and stuck or cross pine and insecure phenomenon.

Further; The present invention is owing to promoting to be provided with spring between nut and the locking spring leaf; When spring unclamps; It can expand into not compressed size; And the locking spring leaf pushed open; Make the locking spring leaf break away from its shell, thereby avoid locking spring leaf and its endoporus to produce friction and influence the trouble that normal clamping force automatically forms.

Further, the used spring of the present invention is the turriform spring, and when the turriform spring was compressed to the limit, its thickness had only the diameter of turriform spring spring wire, thereby made the integral miniaturization of product.

Below in conjunction with accompanying drawing the present invention is done further explanation.

Description of drawings

Fig. 1 is a product cutaway view of the prior art;

Fig. 2 is the product assembling sketch map in the embodiment of the invention;

Fig. 3 is the structural representation of turriform spring in the embodiment of the invention.

Among the figure, 1. drill chuck body; 11. the stable pin of jaw 12. closed screws; 2. jaw; 23. long bushing; 27. spring; 3. promote nut 4. and promote screw mandrel; 42. main frame connecting hole; 5. locking spring leaf; 6. locking gland; 7. lock-nut; 8. bearing ball; 9. shell; 91. locking steel ring; 29. back cover.

The specific embodiment

Embodiment 1:

As shown in Figure 2, a kind of new-type keyless drill chuck comprises drill chuck body 1, jaw 2, long bushing 23, promotion screw mandrel 4, promotes nut 3, spring 27, locking spring leaf 5, back cover 29, lock-nut 7.

Obliquely be processed with a plurality of jaw holes at two ends up and down of running through on the drill chuck; It can be 3; Also can be for more than 3; Jaw 2 is slidingly installed in respectively in the jaw hole; The outer surface that promotes screw mandrel 4 is processed with screw thread; Promote nut 3 was processed with and promoted screw mandrel 4 outer surface threads coupling along the axis internal thread; Promoting nut 3 is rotatably connected on the promotion screw mandrel 4; The position corresponding with jaw 2 upper ends, lower end, outer that promotes nut 3 is processed with the T shape groove of opening along diametric(al); The upper end of jaw 2 is provided with the T shape plush copper that is complementary with T shape groove, and T shape plush copper is movably set in the corresponding T shape groove.

Promoting screw mandrel 4 outer surface threads is 8 ° with the lead angle α that promotes nut 3 inner surface screw threads.

When the present invention uses; Cutter is inserted in the cutter hole; With hand rotation case 9; Driving the drill chuck body relatively rotates with the promotion screw mandrel 4 that is connected on the equipment working shaft; Because jaw 2 is sheathed in the jaw hole; The upper end of jaw 2 is sheathed on respectively and promotes in the corresponding T shape groove that nut 3 is provided with; So shell also forces promotion nut 3 along with shell and synchronous the doing with promotion screw mandrel 4 of drill chuck body relatively rotate with promoting relatively rotating of screw mandrel 4; Promoting nut 3 moves down under the effect of the screw thread that promotes screw mandrel 4; Driving jaw 2 moves down along the jaw hole; Space between jaw 2 lower ends also dwindles thereupon; Put into the cutter in cutter hole until clamping; This moment the starting device motor; Promote screw mandrel 4 rotation at a high speed under the drive of working shaft; Because the static action of inertia of drill chuck body, shell 9 and promotion nut 3; There is stronger impulsive force to play rotation in the starting stage that promotes screw mandrel 4 startups to force drill chuck body, shell 9 and promotion nut 3 to follow one of which; This impulsive force further makes jaw 2 clamp-on tools; Reaction force between cutter and the workpiece afterwards; Also relatively rotate forcing drill chuck body, shell 9 and promote to do between nut 3 and the promotion screw mandrel 4; This has increased the chucking power of 2 pairs of cutters of jaw equally automatically; Thereby possessed the function of self-tightening, make whole keyless drill chuck have very high precision and stability.

Behind clamp-on tool, rotate lock-nut 7, whole keyless drill chuck is by locked, and can reverse by realization equipment this moment, promptly realizes reverse machining functions.

The product that adopts technique scheme to produce; Because promoting screw mandrel 4 is to flexibly connect with drill chuck body 1; Thereby make the present invention have the function of automatic clamp-on tool; The generation that interacts of the torque of the power transmission shaft of the equipment that its chucking power is connected by keyless drill chuck and the inertia resistance square of drill chuck body 1 and the moment of resistance of transmitting when adding the cutter operation of keyless drill chuck clamping in man-hour; Therefore chucking power is big; And can continue to keep, precision is high with stability.

Embodiment 2

Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 6 ° 44 '.

Embodiment 3

Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 5 ° 47 '.

Embodiment 4

Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 4 ° 48 '.

Embodiment 5

Promote screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads and be 3 ° 48 '.

Embodiment 6

Promoting screw mandrel 4 outer surface threads is 2 ° with the lead angle α that promotes nut 3 inner surface screw threads.

Embodiment 7

The upper end that promotes screw mandrel 4 is provided with stopper slot, and locking spring leaf 5 is the disk spring that an outside is processed with the bar v notch v, is provided with spring 27 between locking spring leaf 5 and the promotion nut 3, and it is preferably turriform spring 27.And locking spring leaf 5 and promote the spring 27 between the nut 3 avoids locking spring leaf 5 and its endoporus to produce the trouble that friction and the normal clamping force automatically of influence form.The use of turriform spring 27 can make the integral miniaturization of product.

The present invention since choose reasonable promote the scopes of screw mandrel 4 outer surface threads and the lead angle α that promotes nut 3 inner surface screw threads, promote screw mandrel 4 and promote to be in suitable connection status between the nut 3 thereby make.

Table 1 is to get under the situation of different lead angle α, the correlation values that the moment spanner of employing 4-20NM records.

Table 1

Embodiment Lead angle α Static clamping force Static state is unclamped power Dynamic clamping force 1 <1.5 <1.5 24 2 6°44′ 1.6 1.6 24 3 5°47′ 4.5 3 24 4 4°48′ 8.5 4 24 5 3°48′ 14 8 24 6 24 10.5 24

Annotate:

1, among the embodiment 6, product has good self-locking performance, and the clamping force that static state records originally is the reproduction of clamping force in the dynamic duty;

2, among the embodiment 1, product does not have self-locking performance, has been competent at the achievable task of product among the embodiment 6 during dynamic duty.

Should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, all belong to protection scope of the present invention.

Claims (5)

1. new-type keyless drill chuck; It is provided with drill chuck body and jaw; The drill chuck body is provided with the jaw hole; Jaw is located in the jaw hole, and drill chuck also is provided with and promotes screw mandrel and promote nut, and the outer surface that promotes screw mandrel is provided with screw thread; It is complementary with the screw thread that promotion nut inner surface is provided with; Promote nut and be connected with jaw, it is characterized in that, said promotion screw mandrel outer surface thread with the scope of the lead angle α that promotes nut inner surface screw thread is: 2 °≤α≤8 °.
2. new-type keyless drill chuck according to claim 1, the scope that it is characterized in that promoting screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 3 ° 48 '≤α≤6 ° 44 '.
3. new-type keyless drill chuck according to claim 2, the scope that it is characterized in that promoting screw mandrel outer surface thread and the lead angle α that promotes nut inner surface screw thread is: 4 ° 48 '≤α≤5 ° 47 '.
4. according to claim 1 or 3 described new-type keyless drill chucks, it is characterized in that also being provided with locking device on the said drill chuck, locking device comprises the locking spring leaf, promotes to be provided with spring between nut and the locking spring leaf.
5. new-type keyless drill chuck according to claim 3 is characterized in that said spring is the turriform spring.
CN201110260884.0A 2011-09-02 2011-09-02 A kind of Novel keyless drill chuck CN102343447B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110260884.0A CN102343447B (en) 2011-09-02 2011-09-02 A kind of Novel keyless drill chuck

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110260884.0A CN102343447B (en) 2011-09-02 2011-09-02 A kind of Novel keyless drill chuck
PCT/CN2011/082514 WO2013029312A1 (en) 2011-09-02 2011-11-21 Novel self-tightening drill chuck

Publications (2)

Publication Number Publication Date
CN102343447A true CN102343447A (en) 2012-02-08
CN102343447B CN102343447B (en) 2015-09-02

Family

ID=45542723

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110260884.0A CN102343447B (en) 2011-09-02 2011-09-02 A kind of Novel keyless drill chuck

Country Status (2)

Country Link
CN (1) CN102343447B (en)
WO (1) WO2013029312A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642034A (en) * 2012-04-01 2012-08-22 威海达旺五金制品有限责任公司 Drill chuck with positioning device
WO2014022987A1 (en) * 2012-08-08 2014-02-13 威海达旺五金制品有限责任公司 Drill chuck

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1194195A (en) * 1998-04-07 1998-09-30 游友容 Self fastening drill chuck
CN2361415Y (en) * 1999-01-13 2000-02-02 来雷 Bench lathe locking device
CN201291311Y (en) * 2008-10-30 2009-08-19 于庆滋 Self-tightening drill chuck
CN201333537Y (en) * 2009-01-13 2009-10-28 于庆滋 Keyless drill chuck
US20090315279A1 (en) * 2008-06-18 2009-12-24 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN101745665A (en) * 2009-12-15 2010-06-23 陈月辉 Spring impact driller
CN202291471U (en) * 2011-09-02 2012-07-04 威海达旺五金制品有限责任公司 Novel self-tightening drill chuck

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882943C (en) * 1949-09-07 1953-07-13 Rems Werk Chr Foell & Soehne P Self-tightening drill chuck
GB8631074D0 (en) * 1986-12-31 1987-02-04 Jacobs Mfg Co Drill chuck
US6843484B2 (en) * 2002-07-08 2005-01-18 Monte L. Schroeder Quick change chuck
CN1475320A (en) * 2002-08-12 2004-02-18 于庆滋 Circular claw self fastening type bit holder
CN200991768Y (en) * 2006-12-27 2007-12-19 浙江三鸥机械股份有限公司 Novel drill clip-head

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1194195A (en) * 1998-04-07 1998-09-30 游友容 Self fastening drill chuck
CN2361415Y (en) * 1999-01-13 2000-02-02 来雷 Bench lathe locking device
US20090315279A1 (en) * 2008-06-18 2009-12-24 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN201291311Y (en) * 2008-10-30 2009-08-19 于庆滋 Self-tightening drill chuck
CN201333537Y (en) * 2009-01-13 2009-10-28 于庆滋 Keyless drill chuck
CN101745665A (en) * 2009-12-15 2010-06-23 陈月辉 Spring impact driller
CN202291471U (en) * 2011-09-02 2012-07-04 威海达旺五金制品有限责任公司 Novel self-tightening drill chuck

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642034A (en) * 2012-04-01 2012-08-22 威海达旺五金制品有限责任公司 Drill chuck with positioning device
CN102642034B (en) * 2012-04-01 2014-05-14 威海达旺五金制品有限责任公司 Drill chuck with positioning device
WO2014022987A1 (en) * 2012-08-08 2014-02-13 威海达旺五金制品有限责任公司 Drill chuck

Also Published As

Publication number Publication date
WO2013029312A1 (en) 2013-03-07
CN102343447B (en) 2015-09-02

Similar Documents

Publication Publication Date Title
CN105458321B (en) A kind of drill bit variable-angle rig
US2926020A (en) Quick-change chuck
US20050036844A1 (en) Clamping Device for Hexagon Bits
CN101224504B (en) Self centering chuck
CN202129468U (en) Circumference equal-dividing hole processing device
CN102886544B (en) With the single-spindle drilling machine of workpiece slewing equipment
CN202539612U (en) Lever multi-jaw hydraulic fixture
CN202985183U (en) Three-jaw disc-type fixture for drilling machine
CN200998782Y (en) Cavity type work-piece inner wall drilling equipment
DE102007017074B4 (en) Drill chuck with two-stage clamping mechanism
US8561509B2 (en) Mechanical-activated ID grooving tool
CN201988969U (en) Fixture for hydraulic clamping vehicle for thin-walled parts
CN204262513U (en) Shaft forgings stepping rotates clamping tooling
CN101315021B (en) Automatic reducing borehole-enlarging drilling tool
CN103008718B (en) Horizontal hole drill for cooling water passages of diesel engine cylinder liner-mounting holes
EP2987574B1 (en) A clamping device
CN201333537Y (en) Keyless drill chuck
CN201760769U (en) Multidirectional eccentric wheel machining fixture
CN104325291A (en) Machining device and machining technology for holes of driving axle housing of industrial vehicle
CN205519779U (en) Process drilling tool in omnipotent hole
DE202007010699U1 (en) Hand tool
CN201243245Y (en) Clamp for machining motor stator
CN203091797U (en) Rotary clamping device
CN203401319U (en) Clamp structure of gearbox wedge framework
CN201132268Y (en) Eccentric clamper

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant