WO2008074204A1 - Mandrin de perçage autobloquant à serrement manuel - Google Patents

Mandrin de perçage autobloquant à serrement manuel Download PDF

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Publication number
WO2008074204A1
WO2008074204A1 PCT/CN2007/001972 CN2007001972W WO2008074204A1 WO 2008074204 A1 WO2008074204 A1 WO 2008074204A1 CN 2007001972 W CN2007001972 W CN 2007001972W WO 2008074204 A1 WO2008074204 A1 WO 2008074204A1
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WO
WIPO (PCT)
Prior art keywords
nut
intermediate ring
annular body
locking
self
Prior art date
Application number
PCT/CN2007/001972
Other languages
English (en)
French (fr)
Inventor
Wenhua Zhou
Qiang Zhao
Original Assignee
Zhejiang Sanou Machinery Co., Ltd.
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
Priority claimed from CNU2006201412067U external-priority patent/CN201033360Y/zh
Priority claimed from CN 200710068086 external-priority patent/CN101081444A/zh
Application filed by Zhejiang Sanou Machinery Co., Ltd. filed Critical Zhejiang Sanou Machinery Co., Ltd.
Publication of WO2008074204A1 publication Critical patent/WO2008074204A1/zh

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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
    • B23B31/123—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 with locking arrangements
    • 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
    • B23B31/1238—Jaws movement actuated by a nut with conical screw-thread

Definitions

  • the present invention relates to a drill chuck, and more particularly to a drill chuck mounted on a machining apparatus and a power tool such as a drill press or an electric drill. Background technique
  • the hand drill chuck is provided with a drill body, a clamping jaw, a nut, a rotatable rotating sleeve and a rear sleeve, and the rotating sleeve is axially positioned, and the three clamping jaws are respectively disposed on the drill body.
  • the nut and the jaw are threaded, and the rotating sleeve is directly or indirectly connected to the nut.
  • the rotation of the nut is operated by rotating the sleeve to drive the jaws into and out of the inclined hole to clamp or loosen the drill.
  • the disadvantages of these drill chucks are: clamping of the jaws under impact load The drill bit tends to loosen and even slip off, making it difficult to maintain the continuity of the process.
  • the technical problem to be solved by the present invention is to provide a self-locking hand-tight drill chuck that is not easy to loosen and slip under the impact load.
  • the present invention utilizes the following technical solutions: It includes a drill body, a jaw, an axially positioned rotary sleeve, a nut, and a jaw and a nut threaded connection, the drill chuck being provided with a surrounding drill body in front of the nut and a front annular body that is not rotatable relative to the drill body, the rear end surface of the front annular body is provided with a tooth groove, and the rotary sleeve is provided with an intermediate ring that is coupled to the rotary sleeve and rotates together and can slide back and forth, the middle
  • the ring is between the nut and the front annular body, the intermediate ring has a locking element that cooperates with the front annular body cogging, and the front end face of the nut is provided with a locking element for controlling the intermediate ring
  • the present invention can pass the locking element of the intermediate ring and the front annular body groove Cooperating, the self-locking function is realized, so that the bit clamped by the jaws is not easy to loosen and slip off even under the impact load.
  • Figure 1 is a half cross-sectional view showing a first embodiment of the present invention.
  • Figure 2 is a three-dimensional view of the intermediate ring of the embodiment 1.
  • Figure 3 is an exploded view of Embodiment 1.
  • Figure 4 is a half cross-sectional view showing the second embodiment of the present invention.
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4 in a non-locked state.
  • Figure 6 is an exploded view of Embodiment 2.
  • Figure 7 is a perspective view of the nut of the embodiment 2.
  • Figure 8 is a perspective view of the intermediate ring of the embodiment 2.
  • Figure 9 is a perspective view of the rotary sleeve of the embodiment 2.
  • Figure 10 is a perspective view of the front annular body of Embodiment 2. detailed description
  • the invention comprises a drill body 110, a clamping jaw 140, an axially positioned rotating sleeve 120, and a nut 130.
  • the clamping jaw is screwed to the nut.
  • the drilling chuck is provided with a surrounding drill body in front of the nut and cannot rotate relative to the drill body.
  • the intermediate ring has a locking element that cooperates with the front annular body cogging, and the front end surface of the nut is provided with a locking element for controlling the intermediate ring and the front annular body groove
  • the open configuration and the transition surface 131 between the configuration and the configuration that controls their locking fit, the intermediate ring and the nut are coupled and rotatable relative to the nut between the configurations, the drill chuck being provided with the middle An elastic member 123 that is pressed in the direction of the nut.
  • the front annular body 160 is disposed at the front end of the drill body and is fixed so as not to move relative to the drill body.
  • Middle The locking element carried on the ring 150 is a spring piece 151 having a locking portion that cooperates with the front annular body cogging, the locking portion being a spring piece raised end 154.
  • the configuration of the locking element for controlling the intermediate ring and the dislocation of the front annular body groove and the configuration for controlling their locking fit are profiles 134, 133 of different heights at the front end face of the nut, and the profile 133 is convex
  • the step surface of the front end surface of the nut controls the locking element and the front annular body groove
  • the profile 134 is the base plane of the nut front end.
  • the part that is joined together with the nut as a whole is also considered to be part of the nut, for example, a nut sleeve that is interference-fitted with the nut.
  • the elastic member 123 adopts a spring piece.
  • the intermediate ring is supported by the spring piece 123 and abuts against the profile 134, and the raised end 154 does not fall into the slot 161.
  • the leaf spring is on the stepped surface 133 and its raised end 154 falls into the slot 161.
  • the front end surface of the nut is provided with a convex key 132, and the intermediate ring has an indexing groove 152 that cooperates with the convex key.
  • the torque input can be increased by the cooperation of the indexing groove 152 and the convex key 132, and the clamping force of the drill chuck can be improved.
  • the inner wall of the rotating sleeve is provided with a convex key 121, and the intermediate ring has a mounting positioning groove 153 that cooperates with the convex key.
  • the rotating sleeve is provided with a spring piece mounting groove 122 whose mouth faces the intermediate ring, and the mounting end of the spring piece 123 is disposed in the mounting groove 122.
  • Reference numeral 170 is a collar
  • reference numeral 180 is a ball between the nut and the drill body
  • Reference numeral 190 is a back sleeve that is not movable relative to the drill body.
  • the annular body 160 and the rear sleeve fit axially to the rotating sleeve.
  • the rotating sleeve 120 When operating, the rotating sleeve 120 is rotated. Due to the cooperation of the male key 121 and the mounting positioning groove 153, the intermediate ring rotates together with the rotating sleeve, and the intermediate ring is held by the spring piece 123. The end surface 521 of the indexing groove 152 abuts against the inclined surface 131. At the same time, the nut is rotated, and the jaw gradually protrudes from the jaw hole on the drill body. At this time, the raised end 154 has not yet fallen into the slot 161, and the nut pauses when the jaw basically clamps the tool. Continuing to rotate the rotating sleeve, the end surface 521 of the indexing groove 152 slides over the inclined surface and collides with the convex key 132.
  • the intermediate ring is placed on the step surface 133, and the lifting end 154 falls into the tooth groove 161, and the drilling is performed.
  • the chuck enters the self-locking state, continues to rotate the rotating sleeve, and the raised end 154 slides over the surface of the tooth groove, and the convex key 132 is turned to the end surface 521 of the indexing groove 152.
  • the jaws grip the tool tighter, maximizing the clamping force on the tool.
  • the invention comprises a drill body 210, a clamping jaw 240, an axially positioned rotating sleeve 220, and a nut 230.
  • the clamping jaw is screwed to the nut.
  • the drilling chuck is provided with a surrounding drill body in front of the nut and cannot rotate relative to the drill body.
  • the intermediate ring has a locking element that cooperates with the front annular body cogging, and the front end surface of the nut is provided with a locking element for controlling the intermediate ring and the front annular body groove
  • the elastic member 261 is pressed in the direction of the nut.
  • the locking element is a tooth 252 on the front end face of the intermediate ring.
  • the elastic member 261 which presses the intermediate ring toward the nut is a spring which is interposed between the intermediate ring and the front annular body.
  • the configuration in which the locking elements of the intermediate ring are disengaged from the front annular body cogging and the configuration in which they are locked in engagement are grooves 233 and 234 of different heights at the front end face of the nut.
  • the groove 233 is behind, the groove 234 is at the front, the groove 233 controls the teeth of the intermediate ring to be disengaged from the front annular body groove, and the groove 234 controls the teeth of the intermediate ring and the front annular body groove.
  • the intermediate annular body is provided with a projection 254 that cooperates with the recess.
  • the configuration may also use a profile at a different height from the front end face of the nut, such as a front convex step surface and a rear concave surface at the front end of the nut.
  • the intermediate ring and the nut may be connected by various means such as the cooperation of the key and the groove, the cooperation of the protrusion and the groove.
  • the rotating sleeve and the intermediate ring 250 are coupled by a keyway, so that the intermediate ring 250 can rotate
  • the sleeves rotate together and can slide back and forth.
  • Reference numeral 221 is a key of the inner wall of the rotating sleeve
  • reference numeral 253 is a groove that engages with the key 221 .
  • the front end of the nut is provided with a convex key 232, and the intermediate annular body is provided with an indexing groove 251 that cooperates with the convex key, and the front annular body is slidably mounted on the outside of the drill body, and the drill chuck
  • An elastic member 262 is provided for pressing the front annular body toward the intermediate annular body, and the elastic member 262 is a spring. In this way, the clamping force of the drill chuck to the tool can be increased.
  • This utility example uses a double-shell hand-tight drill chuck as an example, and reference numeral 280 is a back sleeve that cannot move relative to the drill body.
  • Reference numeral 290 is the front cover of the drill chuck, which is positioned by the collar 291 on the step at the front end of the drill body, and the spring 262 is between the front cover 290 and the front annular body 270.
  • Reference numeral 236 is a nut sleeve
  • reference numeral 292 is a ring of balls between the nut and the drill body behind the nut.
  • the rotating sleeve When the tool is clamped, the rotating sleeve is rotated clockwise from the front end of the drill chuck.
  • the projection 254 is in the groove 233, and the teeth of the intermediate ring are disengaged from the front annular body groove, clockwise Rotating the rotating sleeve, the rotating sleeve drives the intermediate ring to rotate, and through the cooperation of the groove 233 and the protrusion 254, the nut is driven to clamp the tool;
  • the jaws clamp the tool, continue to rotate the rotating sleeve, at which time the nut is temporarily rotated, and the protrusion 254 enters the groove 234 through the transition surface 231, and a side wall of the indexing groove 251 is in contact with the convex key 232.
  • the intermediate ring is topped to engage the teeth of the intermediate ring with the front annular body groove.
  • the drill chuck is in a self-locking locking state, and the rotating sleeve is continuously rotated, and the intermediate ring rotates synchronously, and the front annular body is at Under the action of the spring, the teeth 252 are slid over the surface of the tooth groove 271, and at the same time, the convex key 232 is driven by the side wall of the indexing groove 251, and the nut continues to rotate, thereby clamping the tool more tightly.
  • the rotation is stopped and the working state is reached, even if the drill chuck is subjected to an impact load, the nut does not loose relative to the drill body due to the engagement of the teeth of the intermediate ring with the front annular body groove, and the jaws maintain the clamped state of the tool.
  • the rotating sleeve When the tool is to be taken out, the rotating sleeve is rotated counterclockwise, and the middle ring is turned to the other side wall of the indexing groove 251 to collide with the convex key 232.
  • the protrusion 254 enters the groove 233 through the transition surface 231, the teeth and the teeth.

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

Description

一种自锁式手紧钻夹头 技术领域
本发明涉及一种钻夹头， 尤其涉及一种安装在机械加工设备及电动工具例 如钻床、 电钻上的钻夹头。 背景技术
现有技术中， 手紧钻夹头中设有钻体、夹爪、螺母、可旋转的旋转套、后套， 旋转套轴向被定位， 三只夹爪分别设置在均布于钻体上的三个斜孔内， 螺母与夹 爪之间釆用螺纹连接， 旋转套直接或间接与螺母连接。 工作时， 通过操作旋转套 带动螺母旋转从而带动夹爪在斜孔内进出而使钻夹头夹紧或松脱钻具，这些钻夹 头的缺点在于： 受冲击载荷作用下， 夹爪夹持的钻头容易松动打滑甚至脱落， 很 难保持加工的连续性。
' 发明内容
本发明所要解决的技术问题是提供一种在冲击载荷作用下不易松动打滑的 自锁式手紧钻夹头。 为此， 本发明釆用以下技术方案： 它包括钻体、 夹爪、 轴向 定位的旋转套、 螺母， 夹爪与螺母螺紋连接， 所述钻夹头在螺母的前方设有环绕 钻体且不能相对于钻体转动的前部环形体， 所述前部环形体的后端面设有齿槽， 所述旋转套设有与旋转套连接而一起转动且能前后滑动的中间环，所述中间环处 于螺母和前部环形体之间， 所述中间环带有与前部环形体齿槽配合的锁紧元件， 所述螺母的前端面设有控制中间环的锁紧元件与前部环形体齿槽脱幵的构型和 控制它们锁紧配合的构型及构型间的过渡面，所述中间环和螺母相连接并可在上 述构型间相对螺母转动， 所述钻夹头设有将中间环向螺母方向挤压的弹性元件。 由于釆用本发明的技术方案，本发明能通过中间环的锁紧元件与前部环形体齿槽 配合， 实现自锁功能， 使得即使受到冲击载荷作用下， 夹爪夹持的钻头不易松动 打滑脱落。 附图说明
图 1为本发明实施例 1的半剖示意图。
图 2为实施例 1中间环的三维图。
图 3为实施例 1的爆炸图。
图 4为本发明实施例 2的半剖示意图。
图 5为非锁紧状态下图 4的 A-A剖视图。
图 6为实施例 2的爆炸图。
图 7为实施例 2螺母的立体图。
图 8为实施例 2中间环的立体图。
图 9为实施例 2旋转套的立体图。
图 10为实施例 2前部环形体的立体图。 具体实施方式
实施例 1
参照附图 1-3。 本发明包括钻体 110、 夹爪 140、 轴向定位的旋转套 120、 螺母 130， 夹爪与螺母螺紋连接， 所述钻夹头在螺母的前方设有环绕钻体且不能 相对于钻体转动的前部环形体 160， 所述前部环形体的后端面设有齿槽 161， 所 述旋转套设有与旋转套连接而一起转动且能前后滑动的中间环 150， 所述中间环 处于螺母和前部环形体之间， 所述中间环带有与前部环形体齿槽配合的锁紧元 件，所述螺母的前端面设有控制中间环的锁紧元件与前部环形体齿槽脱开的构型 和控制它们锁紧配合的构型及构型间的过渡面 131， 所述中间环和螺母相连接并 可在上述构型间相对螺母转动，所述钻夹头设有将中间环向螺母方向挤压的弹性 元件 123。
所述前部环形体 160设于钻体的前端， 被固定而不能相对钻体运动。 中间 环 150上所带的锁紧元件为弹簧片 151 , 所述弹簧片 151具有与前部环形体齿槽 配合的锁紧部位， 该锁紧部位为弹簧片翘起端 154。
所述控制中间环的锁紧元件与前部环形体齿槽脱幵的构型和控制它们锁紧 配合的构型为处于螺母前端面不同高度的型面 134、 133， 型面 133为凸出于螺 母前端面的台阶面，控制锁紧元件与前部环形体齿槽，型面 134为螺母前端基平 面。
在本发明中， 与螺母连接在一起成为一个整体的零件也被视为螺母的一部 分， 比如， 与螺母过盈配合的螺母套。
本实施例弹性元件 123采用弹簧片，在非自锁状态时，中间环被弹簧片 123 顶住，贴靠在型面 134处，其翘起端 154未落入齿槽 161中，当处于自锁状态时， 弹簧片处于台阶面 133上， 其翘起端 154落入齿槽 161中。
在本实施例中， 所述螺母的前端面设有凸键 132， 所述中间环具有与凸键 配合的转位槽 152。这样， 可以通过转位槽 152和凸键 132的配合增加扭力的输 入， 提高钻夹头的夹紧力。
在本实施例中， 所述旋转套内壁设有凸键 121， 所述中间环具有与凸键配 合的安装定位槽 153。 所述旋转套设有幵口面向中间环的弹簧片安装槽 122， 所 述弹簧片 123的安装端设于安装槽 122中。这样， 可以方便中间环和弹簧片 123 的装配工作并简化它们的结构。
附图标号 170为卡圈，附图标号 180为螺母和钻体间的滚珠。附图标号 190 为不可相对钻体运动的后套。 环形体 160和后套配合对旋转套轴向定位。
当操作时， 转动旋转套 120， 由于凸键 121和安装定位槽 153的配合， 中 间环与旋转套一起转动， 中间环被弹簧片 123顶住，转位槽 152的端面 521贴靠 在斜面 131处， 带动螺母旋转， 夹爪逐渐从钻体上的夹爪孔中伸出， 此时， 翘起 端 154还未落入齿槽 161中， 当夹爪基本夹住工具时， 螺母暂停转动， 继续转动 旋转套， 转位槽 152的端面 521从斜面滑过， 而与凸键 132相碰， 此时， 中间环 被顶在台阶面 133上， 翘起端 154落入齿槽 161中， 钻夹头进入自锁状态， 继续 转动旋转套， 翘起端 154在齿槽表面滑过， 凸键 132被转位槽 152的端面 521 带动， 螺母继续转动， 夹爪更紧地夹紧工具， 最大限度地提高对工具的夹紧力。 在自锁状态时， 除非主动转动旋转套， 否则， 即使钻夹头受到冲击载荷， 因翘起 端 154被齿槽反向顶住， 螺母不会松动， 夹爪保持对工具的夹紧状态。当松脱工 具时， 反向转动旋转套， 中间环退出台阶， 解除自锁状态， 转位槽 152 的端面 522与凸键 132相碰， 从而可以带动螺母反向旋转， 使夹爪后退松脱工具。 实施例 2
参照附图 4-10。 本发明包括钻体 210、 夹爪 240、 轴向定位的旋转套 220、 螺母 230， 夹爪与螺母螺紋连接， 所述钻夹头在螺母的前方设有环绕钻体且不能 相对于钻体转动的前部环形体 270， 所述前部环形体的后端面设有齿槽 271， 所 述旋转套设有与旋转套连接而一起转动且能前后滑动的中间环 250， 所述中间环 处于螺母和前部环形体之间， 所述中间环带有与前部环形体齿槽配合的锁紧元 件，所述螺母的前端面设有控制中间环的锁紧元件与前部环形体齿槽脱开的构型 和控制它们锁紧配合的构型及构型间的过渡面 231， 所述中间环和螺母相连接并 可在上述构型间相对螺母转动，所述钻夹头设有将中间环向螺母方向挤压的弹性 元件 261。
所述锁紧元件为中间环前端面上的齿 252。 所述将中间环向螺母方向挤压 的弹性元件 261为弹簧， 它处于中间环与前部环形体之间。
' 所述控制中间环的锁紧元件与前部环形体齿槽脱开的构型和控制它们锁紧 配合的构型为处于螺母前端面不同高度的凹槽 233和 234。 如图所示， 凹槽 233 在后， 凹槽 234在前， 凹槽 233控制中间环的齿与前部环形体齿槽脱开， 凹槽 234控制中间环的齿与前部环形体齿槽啮合。所述中间环形体设有与所述凹槽配 合的凸出物 254。 所述构型也可釆用处于螺母前端面不同高度的型面， 比如螺母 前端的前凸台阶面及后凹面。
所述中间环和螺母可以通过键和槽的配合、 凸起和凹槽的配合等多种手段 连接。
所述旋转套与中间环 250通过键槽配合而连接， 使中间环 250既能与旋转 套一起转动又能前后滑动。附图标号 221为旋转套内壁的键， 附图标号 253位为 与键 221配合的槽。
所述螺母的前端设有凸键 232， 所述中间环形体设有与所述凸键配合的转 位槽 251， 所述前部环形体可前后滑动地安装在钻体外， 所述钻夹头设有将前部 环形体向中间环形体方向挤压的弹性元件 262， 弹性元件 262采用弹簧。 这样， 可以增加钻夹头对工具的夹紧力。
本实用例采用双壳手紧钻夹头为例， 附图标号 280为不能相对钻体活动的 后套。 附图标号 290为钻夹头的前盖， 它被卡圈 291定位在钻体前端的台阶上， 弹簧 262处于前盖 290和前部环形体 270之间。附图标号 236为螺母套， 附图标 号 292为螺母与螺母后方的钻体之间的一圈滚珠。
夹紧工具时， 从钻夹头的前端看， 旋转套是顺时针转动， 在开始阶段， 凸出 物 254处于凹槽 233中，中间环的齿与前部环形体齿槽脱开,顺时针转动旋转套， 旋转套带动中间环旋转，通过凹槽 233与凸出物 254的配合，螺母被带动使夹爪 夹紧工具；
当夹爪夹住工具后， 继续转动旋转套， 此时螺母暂停转动， 凸出物 254经过 渡面 231进入凹槽 234中， 转位槽 251的一侧壁与凸键 232相碰， 此时， 中间环 被向前顶而使中间环的齿与前部环形体齿槽啮合，此时，钻夹头处于自锁锁紧状 态， 继续转动旋转套， 中间环同步转动， 前部环形体在弹簧的作用下前后窜动， 齿 252在齿槽 271表面滑过， 而同时， 凸键 232被转位槽 251的侧壁带动， 螺母 继续转动， 从而更紧地夹紧工具。 当停止转动进入工作状态时， 即使钻夹头受到 冲击载荷，由于中间环的齿与前部环形体齿槽啮合配合，螺母不会相对钻体松动， 夹爪保持对工具的夹紧状态。
当要取出工具时， 逆时针转动旋转套， 中间环转至转位槽 251的另一侧壁 与凸键 232相碰， '凸出物 254经过渡面 231进入凹槽 233中， 齿与齿槽脱开， 自 锁锁紧状态被解除， 继续转动旋转套， 就可松开夹爪取出工具。

Claims

权利要求书
1、 一种自锁式手紧钻夹头， 包括钻体、 夹爪、 轴向定位的旋转套、 螺母， 夹爪与螺母螺纹连接，其特征在于所述钻夹头在螺母的前方设有环绕钻体且不能 相对于钻体转动的前部环形体，所述前部环形体的后端面设有齿槽，所述旋转套 设有与旋转套连接而一起转动且能前后滑动的中间环，所述中间环处于螺母和前 部环形体之间，所述中间环带有与前部环形体齿槽配合的锁紧元件，所述螺母的 前端面设有控制中间环的锁紧元件与前部环形体齿槽脱开的构型和控制它们锁 紧配合的构型及构型间的过渡面，所述中间环和螺母相连接并可在上述构型间相 对螺母转动， 所述钻夹头设有将中间环向螺母方向挤压的弹性元件。
2、如权利要求 1所述的一种自锁式手紧钻夹头， 其特征在于所述锁紧元件 为弹簧片， 所述弹簧片具有与前部环形体齿槽配合的锁紧部位。
3、如权利要求 1所述的一种自锁式手紧钻夹头， 其特征在于所述锁紧元件 为中间环前端面上的齿。
4、 如权利要求 1所述的一种自锁式手紧钻夹头， 其特征在于所述控制中间 环的锁紧元件与前部环形体齿槽脱开的构型和控制它们锁紧配合的构型为处于 螺母前端面不同高度的型面。
5、 如权利要求 1所述的一种自锁式手紧钻夹头， 其特征在于所述控制中间 环的锁紧元件与前部环形体齿槽脱幵的构型和控制它们锁紧配合的构型为处于 螺母前端面不同高度的凹槽。
6、如权利要求 5所述的一种自锁式手紧钻夹头， 其特征在于所述中间环设 有与所述凹槽配合的凸出物。
7、如权利要求 2所述的一种自锁式手紧钻夹头， 其特征在于所述螺母的前 端面设有凸键， 所述中间环具有与凸键配合的转位槽。
8、如权利要求 3所述的一种自锁式手紧钻夹头， 其特征在于所述螺母的前 端设有凸键，所述中间环设有与所述键配合的转位槽，所述前部环形体可前后滑 动地安装在钻体外，所述钻夹头设有将前部环形体向中间环形体方向挤压的弹性 元件。
9、 如权利要求 8所述的一种自锁式手紧钻夹头， 其特征在于所述前部环形 体和钻体通过键连接， 前部环形体设有与键配合的滑槽。
10、 如权利要求 1所述的一种自锁式手紧钻夹头， 其特征在于所述前部环 形体设于钻体的前端。
11、如权利要求 1所述的一种自锁式手紧钻夹头，其特征在于所述将中间环 向螺母方向挤压的弹性元件处于中间环与前部环形体之间。
12、如权利要求 1所述的一种自锁式手紧钻夹头，其特征在于所述旋转套设 有开口面向中间环的弹性元件安装槽，所述将中间环向螺母方向挤压的弹性元件 的安装端设于安装槽中。
13、如权利要求 1所述的一种自锁式手紧钻夹头，其特征在于所述旋转套与 中间环键槽配合连接。
PCT/CN2007/001972 2006-12-18 2007-06-25 Mandrin de perçage autobloquant à serrement manuel WO2008074204A1 (fr)

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CN200620141206.7 2006-12-18
CN200710068086.1 2007-04-20
CN 200710068086 CN101081444A (zh) 2007-04-20 2007-04-20 一种自锁式手紧钻夹头

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