WO2013029312A1 - Nouveau mandrin porte-foret autoserrant - Google Patents

Nouveau mandrin porte-foret autoserrant Download PDF

Info

Publication number
WO2013029312A1
WO2013029312A1 PCT/CN2011/082514 CN2011082514W WO2013029312A1 WO 2013029312 A1 WO2013029312 A1 WO 2013029312A1 CN 2011082514 W CN2011082514 W CN 2011082514W WO 2013029312 A1 WO2013029312 A1 WO 2013029312A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
screw
drill chuck
nut
thrusting
Prior art date
Application number
PCT/CN2011/082514
Other languages
English (en)
Chinese (zh)
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
Publication of WO2013029312A1 publication Critical patent/WO2013029312A1/fr

Links

Images

Classifications

    • 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
    • B23B2260/00—Details of constructional elements
    • B23B2260/138—Screw threads

Definitions

  • the invention relates to a clamp, in particular to a new self-tightening drill chuck.
  • Drill chucks for holding tools such as drill bits and milling cutters on the working axes of these tool tools have undergone long-term application and improvement and have made great progress.
  • Y's Chinese invention patent discloses a self-tightening drill chuck, which comprises a drill chuck body, three smooth and non-threaded jaws, a push screw and a push nut, and the upper end of the drill chuck body is processed and a connecting hole for pushing the outer diameter of the lower end of the screw rod, pushing the lower end of the screw rod to be sleeved in the connecting hole, and a limiting device for preventing the two from coming off is provided between the drill chuck body and the pushing screw rod, and the pushing device is pushed
  • the outer surface of the screw rod is threaded, the push nut is screwed onto the push screw, and the lower end of the push nut is machined with three open grooves, and the upper ends of the three jaws are provided with protrusions matching the open grooves, convex
  • the head activity is sleeved in the corresponding open groove.
  • the product has the function of automatically clamping the cutter
  • One of the technical problems to be solved by the present invention is that the push screw and the push nut are easily over-tightened or too loose in the prior art; the second technical problem to be solved is that the lock spring piece is easy to rub against the inner hole and affects the normal. Automatic clamping force.
  • the present invention provides a new type of self-tightening chuck, which is provided with a drill chuck body and a jaw.
  • the drill chuck body is provided with a jaw hole, and the jaw is disposed in the jaw hole and drilled.
  • the chuck is further provided with a push screw and a push nut, and the outer surface of the push screw is provided with a thread, which is matched with the thread provided on the inner surface of the push nut, and the push nut is connected with the jaw, and the outer surface of the push rod is pushed
  • the range of the helix angle ⁇ of the thread and the thread on the inner surface of the push nut is: 2° ⁇ ⁇ ⁇ 8°.
  • a preferred technical solution of the present invention is that the range of the screw angle ⁇ of the thread on the outer surface of the screw and the thread on the inner surface of the push nut is: 3°48′ ⁇ 6°44′.
  • a further preferred technical solution of the present invention is that the range of the screw angle ⁇ of the thread on the outer surface of the screw and the thread on the inner surface of the push nut is: 4°48′ ⁇ 5°47′.
  • a still further preferred technical solution of the present invention is that the drill chuck is further provided with a locking device, the locking device comprises a locking spring piece, and a spring is arranged between the pushing nut and the locking spring piece.
  • a still further preferred technical solution of the present invention is that the spring is a tower spring.
  • the value of pushing the outer surface thread of the screw and the screw helix angle ⁇ of the inner surface of the push nut is one of the keys to realize the technical effect of the present invention. If the value of ⁇ is too small, the push screw and the push nut will be in an over-tight state, and it is easy to be stuck; and if the value of ⁇ is too large, the push screw and the push nut will be in a loose state, and the connection is unreliable. .
  • the invention reasonably selects the value of pushing the outer surface thread of the screw rod and the screw helix angle of the inner surface of the push nut, so that the push rod and the push nut are in a proper connection state, and it is not easy to be too tight and jammed or too loose. Unreliable phenomenon.
  • a spring is provided between the push nut and the lock spring piece, when the spring is released, it can be opened to an uncompressed size, and the lock spring piece is pushed open to disengage the lock spring piece.
  • the outer casing prevents the locking spring piece from rubbing against its inner hole and affects the trouble of normal automatic clamping force formation.
  • the spring used in the present invention is a tower spring.
  • the thickness of the tower spring is only the diameter of the tower spring spring wire, thereby miniaturizing the overall product.
  • Figure 1 is a cross-sectional view of a prior art product
  • Figure 2 is a schematic view showing the assembly of the product in the embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of a tower spring in the embodiment of the present invention.
  • Drill chuck body 1 1. Clamping pin; 12. Closed screw; 2. Claw; 23. Long bushing; Spring; 3. push nut; 4. push the screw; 42. main body connection hole; 5. lock spring piece; 6. lock gland; 7. lock nut; 8. bearing steel ball; 9. outer casing; Locking the steel ring; 29. Back sleeve.
  • a new self-tightening drill chuck includes a drill chuck body 1, a clamping jaw 2, a long bushing 23, a push screw 4, a push nut 3, a spring 27, a locking spring piece 5, and a rear. Set 29, lock nut 7.
  • the drill chuck is obliquely processed with a plurality of jaw holes extending through the upper and lower ends, which may be three or more than three, and the jaws 2 are respectively slidably mounted in the jaw holes to push the screw 4
  • the outer surface is machined with a thread
  • the push nut 3 is machined along the central axis with an internal thread matching the outer surface of the push screw 4, and the push nut 3 is screwed onto the push screw 4, pushing the outer edge of the nut 3 and the jaw 2
  • the corresponding position of the upper end is processed in the diameter direction with an open T
  • the groove is formed, and the upper end of the jaw 2 is provided with a T-shaped protrusion matched with the T-shaped groove, and the T-shaped protrusion is sleeved in the corresponding T-shaped groove.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 8°.
  • the cutter When the invention is used, the cutter is inserted into the tool hole, and the outer casing 9 is rotated by hand, and the drill chuck body is driven to rotate relative to the push screw 4 connected to the working shaft of the device, because the jaw 2 is sleeved in the jaw hole.
  • Jaw 2 The upper ends are respectively sleeved in corresponding T-shaped grooves provided by the push nut 3, so that the relative rotation of the outer casing and the push screw 4 also forces the push nut 3 to synchronize and push the lead screw 4 along with the outer casing and the drill chuck body.
  • the push nut 3 moves downward under the action of the thread of the push screw 4 to drive the jaw 2 Moving downward along the jaw hole, the gap between the lower ends of the jaws 2 is also reduced until the tool placed in the tool hole is clamped, and the device motor is started to push the screw 4 High-speed rotation under the driving of the working shaft, due to the static inertia of the drill chuck body, the outer casing 9 and the push nut 3, there is a strong impact force in the initial stage of pushing the screw shaft 4 to force the drill chuck body and the outer casing.
  • the lock nut 7 When the tool is clamped, the lock nut 7 is rotated, and the entire self-tightening chuck is locked. At this time, the device reversal can be realized, that is, the reverse machining function is realized.
  • the product produced by the above technical scheme is driven by the screw 4
  • the drill chuck body 1 is movably connected, thereby providing the present invention with the function of automatically clamping the cutter, the clamping force of which is the torque of the drive shaft of the equipment connected from the self-tightening chuck and the inertia resistance of the drill chuck body 1.
  • the moment and the resistance torque transmitted by the tool held by the tight drill chuck during the machining process are generated, so that the clamping force is large and can be continuously maintained, and the precision and stability are high.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 6°44'.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 5°47'.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 4°48'.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 3°48'.
  • the helix angle ⁇ of the thread on the outer surface of the screw 4 and the thread on the inner surface of the push nut 3 is 2°.
  • the upper end of the push screw 4 is provided with a limiting groove, and the locking spring piece 5 is A disc spring having a strip-shaped notch is formed on the outside, and a spring 27 is provided between the lock spring piece 5 and the push nut 3, which is preferably a tower spring 27.
  • the spring 27 between the locking spring piece 5 and the push nut 3 prevents the locking spring piece 5 from rubbing against its inner hole and affects the trouble of the formation of the normal automatic clamping force.
  • the use of the tower spring 27 allows the overall miniaturization of the product.
  • the present invention appropriately selects a range of the screw angle ⁇ for pushing the outer surface thread of the screw shaft 4 and the thread of the inner surface of the push nut 3, so that the push screw 4 and the push nut 3 are in a proper connection state.
  • Table 1 shows the relevant values measured with a 4-20 N•M force distance wrench with different helix angles ⁇ .
  • the product has good self-locking property and the statically measured clamping force is the reproduction of the clamping force during dynamic working;
  • the product has no self-locking property, and the dynamic work is competent for the tasks that can be completed in the product of the sixth embodiment.

Abstract

La présente invention se rapporte à un nouveau mandrin porte-foret autoserrant, qui résout les problèmes techniques de l'état de la technique, tels que le fait d'effectuer un serrage trop fort ou un desserrage trop important entre la vis de poussée et l'écrou de poussée et l'effet entraîné par la friction probable entre l'élément ressort d'arrêt et un trou intérieur de celui-ci sur la force de serrage automatique normale, et est doté d'un corps de mandrin porte-foret et de mâchoires de serrage. Le corps de mandrin porte-foret est doté d'un trou pour mâchoires. Les mâchoires de serrage sont disposées dans le trou pour mâchoires. Le mandrin porte-foret est en outre doté d'une vis de poussée et d'un écrou de poussée. Une surface extérieure de la vis de poussée est dotée d'un filetage, et le filetage s'accouple avec un filetage situé dans une surface intérieure de l'écrou de poussée. L'écrou de poussée est relié aux mâchoires de serrage. La plage de l'angle d'hélice α du filetage sur la surface extérieure de la vis de poussée et de celui du filetage sur la surface intérieure de l'écrou de poussée est de : 2° ≤ α ≤ 8°. La présente invention présente une force de serrage importante, peut maintenir la force de serrage de façon continue, a une précision et une stabilité élevées, et peut être largement appliquée lors d'opérations de production.
PCT/CN2011/082514 2011-09-02 2011-11-21 Nouveau mandrin porte-foret autoserrant WO2013029312A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110260884.0A CN102343447B (zh) 2011-09-02 2011-09-02 一种新式自紧钻夹头
CN201110260884.0 2011-09-02

Publications (1)

Publication Number Publication Date
WO2013029312A1 true WO2013029312A1 (fr) 2013-03-07

Family

ID=45542723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/082514 WO2013029312A1 (fr) 2011-09-02 2011-11-21 Nouveau mandrin porte-foret autoserrant

Country Status (2)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642034B (zh) * 2012-04-01 2014-05-14 威海达旺五金制品有限责任公司 具有定位装置的钻夹头
WO2014022987A1 (fr) * 2012-08-08 2014-02-13 威海达旺五金制品有限责任公司 Mandrin de perçage
CN112203788B (zh) * 2018-03-21 2023-09-08 捷可勃斯夹头制造（苏州）有限公司 具有自动夹爪调节的夹头
CN109940200A (zh) * 2019-04-28 2019-06-28 柳尧亭 离合装置、钻夹头、动力工具和钻夹头双向转动的方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882943C (de) * 1949-09-07 1953-07-13 Rems Werk Chr Foell & Soehne P Selbstspannendes Bohrfutter
GB2199776A (en) * 1986-12-31 1988-07-20 Jacobs Mfg Co Self tightening drill chuck
EP1380372A1 (fr) * 2002-07-08 2004-01-14 The Boeing Company Mandrin à action rapide
CN1475320A (zh) * 2002-08-12 2004-02-18 于庆滋 圆爪自紧式钻夹头
CN200991768Y (zh) * 2006-12-27 2007-12-19 浙江三鸥机械股份有限公司 一种新式钻夹头
CN201291311Y (zh) * 2008-10-30 2009-08-19 于庆滋 一种自紧钻夹头
CN201333537Y (zh) * 2009-01-13 2009-10-28 于庆滋 一种自紧钻夹头

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1089285C (zh) * 1998-04-07 2002-08-21 游友容 自紧式钻夹头
CN2361415Y (zh) * 1999-01-13 2000-02-02 来雷 台式车床锁紧装置
US8403339B2 (en) * 2008-06-18 2013-03-26 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN101745665A (zh) * 2009-12-15 2010-06-23 陈月辉 弹簧冲击钻孔器
CN202291471U (zh) * 2011-09-02 2012-07-04 威海达旺五金制品有限责任公司 一种新式自紧钻夹头

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882943C (de) * 1949-09-07 1953-07-13 Rems Werk Chr Foell & Soehne P Selbstspannendes Bohrfutter
GB2199776A (en) * 1986-12-31 1988-07-20 Jacobs Mfg Co Self tightening drill chuck
EP1380372A1 (fr) * 2002-07-08 2004-01-14 The Boeing Company Mandrin à action rapide
CN1475320A (zh) * 2002-08-12 2004-02-18 于庆滋 圆爪自紧式钻夹头
CN200991768Y (zh) * 2006-12-27 2007-12-19 浙江三鸥机械股份有限公司 一种新式钻夹头
CN201291311Y (zh) * 2008-10-30 2009-08-19 于庆滋 一种自紧钻夹头
CN201333537Y (zh) * 2009-01-13 2009-10-28 于庆滋 一种自紧钻夹头

Also Published As

Publication number Publication date
CN102343447A (zh) 2012-02-08
CN102343447B (zh) 2015-09-02

Similar Documents

Publication Publication Date Title
WO2013029312A1 (fr) Nouveau mandrin porte-foret autoserrant
US20110227299A1 (en) Self-Tightening Drill Chuck
JPH0655315A (ja) ドライブビットソケットを有するチャック
EP3456449B1 (fr) Mandrin porte-foret à serrage automatique et à engrenages
WO2014094201A1 (fr) Mandrin porte-foret à clé à verrouillage automatique
CN208961060U (zh) 一种径向套筒钻孔夹具
WO2014019148A1 (fr) Nouveau mandrin
CN104439414A (zh) 钻孔夹紧装置
JP4234169B2 (ja) タップの締結構造及びタップの締結方法
WO2014012215A1 (fr) Nouveau mandrin porte-mèche
WO2014012238A1 (fr) Nouveau mandrin de perçage
JP5325644B2 (ja) 旋盤のチャック装置及びその芯出し方法
JP3083291B1 (ja) 工具ホルダ
US2315524A (en) Positive drive chuck
WO2012097664A1 (fr) Affûteuse pour foret
CN214868889U (zh) 一种螺杆钻孔夹具
CN204603819U (zh) 钎头排粉槽铣削夹具
CN211361513U (zh) 潜孔钻精车大头外圆用的夹具
CN202291471U (zh) 一种新式自紧钻夹头
CN216504763U (zh) 一种车床弹簧夹头扳手
TW202015838A (zh) 組合式銑切夾持裝置
US20060091620A1 (en) Chuck device
CN214263908U (zh) 一种便于车削法兰盲板的车床
WO2014022987A1 (fr) Mandrin de perçage
WO2014190520A1 (fr) Mandrin porte-foret novateur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11871543

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11871543

Country of ref document: EP

Kind code of ref document: A1