WO2019037690A1 - 手紧钻夹头 - Google Patents

手紧钻夹头 Download PDF

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Publication number
WO2019037690A1
WO2019037690A1 PCT/CN2018/101398 CN2018101398W WO2019037690A1 WO 2019037690 A1 WO2019037690 A1 WO 2019037690A1 CN 2018101398 W CN2018101398 W CN 2018101398W WO 2019037690 A1 WO2019037690 A1 WO 2019037690A1
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Prior art keywords
nut
washer
drill
drill body
hand
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PCT/CN2018/101398
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English (en)
French (fr)
Inventor
周文华
吴云贵
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浙江三鸥机械股份有限公司
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Application filed by 浙江三鸥机械股份有限公司 filed Critical 浙江三鸥机械股份有限公司
Publication of WO2019037690A1 publication Critical patent/WO2019037690A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/12—Adapters for drills or chucks; Tapered sleeves

Definitions

  • the invention relates to a hand drill chuck.
  • the hand drill chuck is one of the conventional drill chucks, which directly rotates the jacket with a hand to rotate the chuck to perform a loosening or tightening operation.
  • a conventional hand-tight drill chuck a nut is arranged between the nut and the support step of the drill body.
  • the washer is fixed on the drill body by an interference fit, and the nut is installed in the nut slot of the middle part of the drill body.
  • the nut is first cut into two halves, then loaded into the drill nut nut slot, and then the nut sleeve is used to fit the body, and the inclined jaw hole is set on the drill body.
  • the drill chuck of this structure has a large diameter of the drill body, and cannot reduce the diameter of the drill body, and has a large overall weight, and is more power-consuming and labor-intensive when used on a pistol drill.
  • the technical problem to be solved by the present invention is to provide a hand-tight drill chuck which can facilitate the diameter reduction of the drill body and improve the working precision of the drill chuck.
  • the present invention adopts the following technical solutions:
  • the hand tightens the chuck, including the drill body, the nut, the jaw, the jaw has an external thread and is screwed with the nut, the middle portion of the drill body is provided with a supporting step, and the washer is a washer for supporting the nut, The washer is fixedly coupled to the drill body and is not rotatable relative to each other.
  • the front of the nut is limited by a component other than the drill body, and the hand drill chuck is provided with a tilting jaw hole, wherein the gripper hole is Formed on the combined monolith of the washer and the drill body, the gasket also has a partial contour wall of the jaw hole at a portion where the jaw passes, and is combined with a part of the jaw hole wall of the drill body at the inner side thereof The contour of the jaw hole at this position.
  • the present invention may also adopt the following further technical solutions or combine these technical solutions:
  • the contour wall of the jaw hole on the washer is an inclined wall that is inclined along the jaw hole.
  • the drill chuck is provided with an anti-nut inclined structure between the nut and the washer.
  • the washer has the nut limit edge or the limit step as a structure for preventing the nut from tilting.
  • the nut limit step or the nut limit side sleeve is sleeved outside the nut to form a radial limit on the nut.
  • the lower part of the nut is provided with a limiting step or a limiting edge, and the limiting step or the limiting edge cooperates with the washer as an anti-nut inclined structure.
  • the limit step or the limit side cover sleeve forms a radial limit on the nut outside the gasket.
  • a lower limit groove is disposed on a lower portion of the nut, and a limit button matched with the limit annular groove is disposed on the washer.
  • the nut body is not provided with a nut limiting groove, and the nut is connected with the rotating casing of the drill chuck; the axial limit of the nut does not adopt the nut limiting groove, but is axially restricted.
  • the rotating outer sleeve is axially constrained or axially constrained together with the rotating outer sleeve; the rear end of the nut is supported on the washer or supported on the washer by a bearing, the front end of the drill body is disposed Rotate the front end limit of the outer casing.
  • the invention has a simple structure, and the jaw hole is provided from the washer and the drill body as a whole, which is simpler and more accurate, can facilitate the diameter reduction of the drill body, and reduce the weight and cost of the drill chuck. Reducing the centrifugal force during the operation of the drill chuck makes the drill chuck work more accurately and easier to operate.
  • the nut does not need to be assembled into two halves, and the installation is convenient, and the performance of the drill chuck can be further improved by the anti-tilt structure of the nut and the phenomenon that the jaws are disengaged from the nut can be prevented.
  • FIG. 1 is a cross-sectional view of an embodiment of the present invention.
  • Figure 2 is an exploded view of the embodiment of Figure 1.
  • Figure 3 is a schematic view of the drill body before machining the jaw holes in the embodiment of Figure 1.
  • Figure 4 is a schematic illustration of the gasket of Figure 1 prior to assembly.
  • Figure 5 is a schematic view of the embodiment of Figure 1 before the gasket is assembled to the drill body and the jaws are machined.
  • Figure 6 is a schematic view of the embodiment of Figure 1 after the gasket is assembled to the drill body and the jaws are machined.
  • Figure 7 is a schematic cross-sectional view of the embodiment of Figure 1 after the gasket is assembled to the drill body and the jaws are machined.
  • Figure 8 is a longitudinal cross-sectional view of the embodiment of Figure 1 after the gasket is assembled to the drill body and the jaws are machined.
  • Figure 9 is a schematic illustration of the situation in which the drill bit is ready to begin machining the jaw bores integrally with the washer and drill body assembly.
  • Fig. 10 is a schematic view showing the state after the drill bit and the drill body are integrally processed with the jaw hole.
  • the hand drill chuck provided by the present invention comprises a drill body 1, a nut 2, and a jaw 3.
  • a support step 11 is disposed in a middle portion of the drill body, and a washer 4 is placed on the support step 11.
  • the washer 4 is a washer supporting the nut 2, and a lubrication mechanism such as a bearing 5 may be disposed between the nut 2 and the washer 4, the washer It is fixedly connected to the drill body 1 and cannot be rotated relative to each other, for example, by an interference fit connection.
  • the hand-tight drill chuck is provided with an inclined jaw hole 6 which is bored in the jaw hole 6.
  • the jaw 3 has an external thread and is screwed with the nut 2, and is displaced back and forth by the driving of the nut 2 To clamp and loosen the drill bit.
  • the jaw hole 6 is formed on the combined monolith of the washer 4 and the drill body 1.
  • the washer is first placed on the drill body and pushed onto the support step 11 to form an interference fit, and then The combination of the washer 4 and the drill body 1 is machined with a drill bit 100 for the inclined jaw hole 6, which also has a partial contour wall 40 of the jaw hole 6 at the location where the jaw passes, the partial contour wall 40 and A portion of the jaw wall 60 on the inner drill body synthesizes a jaw aperture profile at the location, and the jaw aperture contour wall 40 on the washer 4 has a sloped wall that slopes along the jaw aperture.
  • the drill chuck is provided with an anti-nut inclined structure between the nut and the washer to prevent the torque from increasing and unbalanced when the jaw is retracted to the limit, so that the central axis of the nut 2 is inclined to the central axis of the drill body to cause the jaw Dropped.
  • a nut limiting edge 41 is disposed on the washer 4, and the limiting edge 41 is sleeved outside the nut to form a radial limit on the nut as the anti-nut inclined structure.
  • the gasket 4 is stamped to form a unitary piece of the belt edge 41.
  • the nut is an integral part, and the nut body 1 is not provided with a nut limiting groove, and the front side thereof is limited by components other than the drill body.
  • the front end of the drill body is provided with a front end limiting member 7 of the rotating outer casing.
  • the rotating outer casing 8 can be axially constrained from the front of the nut 2, and reference numeral 80 is a limiting portion of the rotating outer casing 8 which is axially constrained from the front of the nut 2.
  • connection of the nut 2 and the rotating outer casing 8 can be connected by a key groove formed by a peripheral surface of the nut and a key groove on the inner circumferential surface of the rotating outer casing, the rotating outer casing being axially restrained from the front portion of the nut.
  • Reference numeral 21 is a keyway on the nut that implements keyway engagement.
  • the nut 2 is connected to the rotating outer sleeve 8 of the drill chuck.
  • the connection may also be integrally connected by insert molding.
  • the nut 3 and the rotating outer sleeve 8 may also have a keyway matching structure at the same time; or, by means of interference fit, etc.
  • the fixed connection is integrated, and the outer circumferential surface of the nut and the inner circumferential surface of the rotating outer casing may have a keyway matching structure at the same time as the interference fit portion, so that the rotating outer casing 8 is restrained in the axial direction of the drill chuck, and the nut 2 is on the shaft
  • the upward direction is also limited; or, the limit structure simultaneously axially limits the rotating outer casing 8 and the nut 2 together.
  • the connection between the nut and the rotating sleeve can also be connected by means of other components, so that the rotating outer sleeve can drive the nut to rotate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

一种手紧钻夹头，包括钻体（1）、螺母（2）、夹爪（3），夹爪具有外螺纹而和螺母螺纹连接，所述钻体的中部设置支撑台阶（11），支撑台阶上放置垫圈（4），所述垫圈为支撑螺母的垫圈，所述垫圈与钻体固定连接而不能相对转动，所述螺母的前方由钻体以外的部件限位，所述手紧钻夹头设有倾斜的夹爪孔（6），所述夹爪孔是形成在所述垫圈和钻体的组合整体件上，所述垫圈上在夹爪经过的部位也具有夹爪孔的部分轮廓壁（40），并与在其内侧的钻体的部分夹爪孔壁（60）合成在该位置上的夹爪孔轮廓。所述手紧钻夹头结构简单，从垫圈和钻体作为一个整体来设置夹爪孔，制造更简单和准确，能够便于钻体减小直径，降低钻夹头的重量和成本，减小钻夹头工作时的离心力，使钻夹头的工作精度更高、更容易操作。

Description

手紧钻夹头 技术领域
本发明涉及手紧钻夹头。
背景技术
手紧钻夹头是常规钻夹头中的一种，其直接采用手转动钻夹头旋转外套来进行旋松或拧紧操作。传统的手紧钻夹头，螺母和其后方的钻体支撑台阶之间设置垫圈，垫圈是过盈配合固定在钻体上，且螺母安装在钻体中部的螺母卡槽中，为了装配，需要将螺母先剖成两半，再装到钻体螺母卡槽中后再采用螺母套将其合体，倾斜的夹爪孔设置在钻体上。这种结构的钻夹头，钻体的直径较大，且无法减小钻体的直径，整体重量大，在手枪电钻上使用时，更加耗电和费力。
发明内容
本发明所要解决的技术问题是提供一种手紧钻夹头，能够便于钻体减小直径，并提高钻夹头的工作精度。为此，本发明采用以下技术方案：
手紧钻夹头，包括钻体、螺母、夹爪，夹爪具有外螺纹而和螺母螺纹连接，所述钻体的中部设置支撑台阶，支撑台阶上放置垫圈，所述垫圈为支撑螺母的垫圈，所述垫圈与钻体固定连接而不能相对转动，所述螺母的前方由钻体以外的部件限位，所述手紧钻夹头设有倾斜的夹爪孔，其特征在于所述夹爪孔是形成在所述垫圈和钻体的组合整体件上，所述垫圈上在夹爪经过的部位也具有夹爪孔的部分轮廓壁，并与在其内侧的钻体的部分夹爪孔壁合成在该位置上的夹爪孔轮廓。
在采用上述技术方案的基础上，本发明还可采用采用以下进一步的技术方案或对这些技术方案进行组合使用：
所述垫圈上的夹爪孔轮廓壁呈顺着夹爪孔倾斜度的斜壁。
所述钻夹头在螺母和垫圈之间设置有防螺母倾斜结构。
所述垫圈具有所述螺母限位边或限位台阶，作为防止螺母倾斜的结构。
所述螺母限位台阶或螺母限位边包套在螺母外形成对螺母的径向限位。
所述螺母的下部设置限位台阶或设置限位边，所述限位台阶或限位边与垫圈配合作为防 螺母倾斜结构。
所述限位台阶或限位边包套在垫圈外形成对螺母的径向限位。
所述螺母的下部设置限位环形槽，所述垫圈上设置与限位环形槽配合的限位键。
所述钻体上不设置螺母限位槽，所述螺母和钻夹头的旋转外套连接；所述螺母的轴向限位不采用所述螺母限位槽，而是通过轴向被限位的所述旋转外套而被轴向限位，或者与所述旋转外套一起被轴向限位；所述螺母的后端支撑在所述垫圈或通过轴承支撑在垫圈上，所述钻体的前端设置旋转外套的前端限位部件。
由于采用本发明的技术方案，本发明结构简单，从垫圈和钻体作为一个整体来设置夹爪孔，制造更简单和准确，能够便于钻体减小直径，降低钻夹头的重量和成本，减小钻夹头工作时的离心力，使钻夹头的工作精度更高、更容易操作。本发明中，螺母无需再剖成两半装配，安装方便，且能通过螺母的防倾斜结构进一步提高钻夹头的性能和防止出现夹爪脱出螺母的现象。
附图说明
图1为本发明所提供的实施例的剖视图。
图2为图1所示实施例的爆炸图。
图3为图1所示实施例中钻体在加工夹爪孔前的示意图。
图4为图1所示实施例中垫圈在装配前的示意图。
图5为图1所示实施例在垫圈装配到钻体上，加工夹爪孔前的示意图。
图6为图1所示实施例在垫圈装配到钻体上，加工夹爪孔后的示意图。
图7为图1所示实施例在垫圈装配到钻体上，加工夹爪孔后横截面示意图。
图8为图1所示实施例在垫圈装配到钻体上，加工夹爪孔后纵截面示意图。
图9为钻头准备开始对垫圈和钻体组合整体加工夹爪孔的态势示意图。
[根据细则91更正 18.10.2018]　
图10为钻头对垫圈和钻体组合整体加工夹爪孔后的态势示意图。
具体实施方式
参照附图。本发明所提供的手紧钻夹头包括钻体1、螺母2、夹爪3。所述钻体的中部设置支撑台阶11，支撑台阶11上放置垫圈4，所述垫圈4为支撑螺母2的垫圈，在螺母2和垫 圈4之间可设置润滑机构，比如轴承5，所述垫圈与钻体1固定连接而不能相对转动，比如采用过盈配合连接。
所述手紧钻夹头设有倾斜的夹爪孔6，夹爪3穿设在夹爪孔6中，夹爪3具有外螺纹而和螺母2螺纹连接，通过螺母2对其的驱动而前后位移，以夹紧和放松钻头。所述夹爪孔6是形成在所述垫圈4和钻体1的组合整体件上，在制造时，先将垫圈套在钻体上一直推到支撑台阶11上并形成过盈配合，然后对垫圈4和钻体1组合整体件用钻头100加工倾斜的夹爪孔6，所述垫圈4上在夹爪经过的部位也具有夹爪孔6的部分轮廓壁40，部分轮廓壁40与在其内侧的钻体上的部分夹爪孔壁60合成在该位置上的夹爪孔轮廓，所述垫圈4上的夹爪孔轮廓壁40呈顺着夹爪孔倾斜度的斜壁。
所述钻夹头在螺母和垫圈之间设置有防螺母倾斜结构，防止夹爪后退到极限时，因扭矩增大且不平衡，致使螺母2的中轴线倾斜钻体的中轴线而导致夹爪掉落。
所述垫圈4上设置螺母限位边41，限位边41包套在螺母外形成对螺母的径向限位，作为所述防螺母倾斜结构。所述垫圈4经冲压形成带边41的整体件。
所述螺母为整体部件，所述钻体1上不设置螺母限位槽，其前方由钻体以外的部件限位。本实施例中，所述钻体的前端设置旋转外套的前端限位部件7。所述旋转外套8可从螺母2的前部对其轴向限位，附图标号80为旋转外套8从螺母2的前部对其轴向限位的限位部位。所述螺母2和所述旋转外套8的连接可以通过螺母外周面和旋转外套内周面上的键槽所形成的键槽配合而连接，所述旋转外套从螺母的前部对其轴向限位。附图标号21为螺母上的实现键槽配合的键槽。
所述螺母2和钻夹头的旋转外套8连接，该连接还可以是通过镶嵌注塑连接为一体，所述螺母3和旋转外套8还可同时有键槽配合结构；或者，通过过盈配合等方式固定连接为一体，螺母外周面和旋转外套内周面在过盈配合部位同时还可有键槽配合结构，这样，旋转外套8在钻夹头的轴向上被限位了，则螺母2在轴向上也被限位；或者，限位结构同时对旋转外套8和螺母2一起轴向限位。螺母和旋转套的连接方式也可以是借助其它部件来连接，使旋转外套能带动螺母旋转。
以上所述仅为本发明的具体实施例，但本发明的结构特征并不局限于此，任何本领域的 技术人员在本发明的领域内，所作的变化或修饰皆涵盖在本发明的保护范围之中。

Claims (9)

  1. 手紧钻夹头，包括钻体、螺母、夹爪，夹爪具有外螺纹而和螺母螺纹连接，所述钻体的中部设置支撑台阶，支撑台阶上放置垫圈，所述垫圈为支撑螺母的垫圈，所述垫圈与钻体固定连接而不能相对转动，所述螺母的前方由钻体以外的部件限位，所述手紧钻夹头设有倾斜的夹爪孔，其特征在于，所述夹爪孔是形成在所述垫圈和钻体的组合整体件上，所述垫圈上在夹爪经过的部位也具有夹爪孔的部分轮廓壁，并与在其内侧的钻体的部分夹爪孔壁合成在该位置上的夹爪孔轮廓。
  2. 如权利要求1所述的手紧钻夹头，其特征在于，所述垫圈上的夹爪孔轮廓壁呈顺着夹爪孔倾斜度的斜壁。
  3. 如权利要求1所述的手紧钻夹头，其特征在于，所述钻夹头在螺母和垫圈之间设置有防螺母倾斜结构。
  4. 如权利要求3所述的手紧钻夹头，其特征在于，所述垫圈具有所述螺母限位边或限位台阶，作为防止螺母倾斜的结构。
  5. 如权利要求4所述的手紧钻夹头，其特征在于，所述螺母限位台阶或螺母限位边包套在螺母外形成对螺母的径向限位。
  6. 如权利要求3所述的手紧钻夹头，其特征在于，所述螺母的下部设置限位台阶或设置限位边，所述限位台阶或限位边与垫圈配合作为防螺母倾斜结构。
  7. 如权利要求6所述的手紧钻夹头，其特征在于，所述限位台阶或限位边包套在垫圈外形成对螺母的径向限位。
  8. 如权利要求3所述的手紧钻夹头，其特征在于，所述螺母的下部设置限位环形槽，所述垫圈上设置与限位环形槽配合的限位键。
  9. 如权利要求1所述的手紧钻夹头，其特征在于，所述钻体上不设置螺母限位槽，所述螺母和钻夹头的旋转外套连接；所述螺母的轴向限位不采用所述螺母限位槽，而是通过轴向被限位的所述旋转外套而被轴向限位，或者与所述旋转外套一起被轴向限位；所述螺母的后端支撑在所述垫圈或通过轴承支撑在垫圈上，所述钻体的前端设置旋转外套的前端限位部件。
PCT/CN2018/101398 2017-08-22 2018-08-20 手紧钻夹头 WO2019037690A1 (zh)

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* Cited by examiner, † Cited by third party
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CN207272260U (zh) * 2017-08-22 2018-04-27 浙江三鸥机械股份有限公司 手紧钻夹头

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07195278A (ja) * 1993-12-16 1995-08-01 Robert Bosch Gmbh 手持ち穿孔機
CN1872463A (zh) * 2005-05-31 2006-12-06 浙江三鸥机械股份有限公司 一种手紧钻夹头及其制造方法
CN202028802U (zh) * 2011-03-28 2011-11-09 浙江贝力得夹头工业有限公司 新型手紧钻夹头
EP2526879A2 (de) * 2011-05-24 2012-11-28 Aesculap AG Spannfutteranordnung einer medizinischen Handbohr- oder Handfräsmaschine
CN205496596U (zh) * 2016-03-29 2016-08-24 浙江三鸥机械股份有限公司 手紧钻夹头
DE102015105334A1 (de) * 2015-04-08 2016-10-13 Metabowerke Gmbh Bohrfutter
CN207272260U (zh) * 2017-08-22 2018-04-27 浙江三鸥机械股份有限公司 手紧钻夹头

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07195278A (ja) * 1993-12-16 1995-08-01 Robert Bosch Gmbh 手持ち穿孔機
CN1872463A (zh) * 2005-05-31 2006-12-06 浙江三鸥机械股份有限公司 一种手紧钻夹头及其制造方法
CN202028802U (zh) * 2011-03-28 2011-11-09 浙江贝力得夹头工业有限公司 新型手紧钻夹头
EP2526879A2 (de) * 2011-05-24 2012-11-28 Aesculap AG Spannfutteranordnung einer medizinischen Handbohr- oder Handfräsmaschine
DE102015105334A1 (de) * 2015-04-08 2016-10-13 Metabowerke Gmbh Bohrfutter
CN205496596U (zh) * 2016-03-29 2016-08-24 浙江三鸥机械股份有限公司 手紧钻夹头
CN207272260U (zh) * 2017-08-22 2018-04-27 浙江三鸥机械股份有限公司 手紧钻夹头

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