WO2013029312A1 - Novel self-tightening drill chuck - Google Patents

Novel self-tightening drill chuck 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
French (fr)
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/en

Links

Images

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

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

The present invention relates to a novel self-tightening drill chuck, which solves the technical problems in the prior art of over-tightening or over-looseness between the thrusting screw and the thrusting nut and of the effect incurred by the likely friction between the locking spring piece and an inner hole thereof on the normal automatic clamping force, and is provided with a drill chuck body and clamping jaws. The drill chuck body is provided with a jaw hole. The clamping jaws are disposed in the jaw hole. The drill chuck is further provided with a thrusting screw and a thrusting nut. An outer surface of the thrusting screw is provided with a thread, and the thread matches a thread provided in an inner surface of the thrusting nut. The thrusting nut is connected to the clamping jaws. The range of the helix angle α of the thread on the outer surface of the thrusting screw and that of the thread on the inner surface of the thrusting nut is: 2°≤α≤8°. The present invention has a large clamping force, can maintain the clamping force continuously, has high precision and stability, and may be widely applied in production operations.

Description

一种新式自紧钻夹头 A new type of self-tightening chuck
技术领域Technical field
本发明涉及一种夹具,具体说是一种新式自紧钻夹头。The invention relates to a clamp, in particular to a new self-tightening drill chuck.
背景技术Background technique
在生产活动中,需要经常使用机床、电钻等工具进行钻孔、铣削等作业。装设在这些工具主机工作轴上用于夹持钻头、铣刀等刀具的钻夹头经历了长期的应用和改进,已经取得了长足的发展。In production activities, tools such as machine tools and electric drills are often used for drilling and milling. 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.
公告日期为2009年8月19日、公告号为CN 201291311 Y的中国发明专利公开了一种自紧式钻夹头,其包括钻夹头本体、三个表面光滑不设螺纹的夹爪、推动丝杆和推动螺母,钻夹头本体的上端加工有与推动丝杆下端外径匹配的连接孔,推动丝杆的下端活动套设于所述连接孔中,钻夹头本体与所述推动丝杆之间设有防止两者脱离的限位装置,推动丝杆的外表面加工有螺纹,推动螺母旋接于推动丝杆上,推动螺母的外沿下端加工有三个开口沟槽,三个夹爪的上端设有与开口凹槽匹配的凸头,凸头活动套设于对应的开口沟槽中,该产品具有自动夹紧刀具的功能,夹持力大,精度和稳定性高,同时结构简单,重量轻,易于加工和小型化,生产成本低,便于推广使用。 The announcement date is August 19, 2009, and the announcement number is CN 201291311. 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, has large clamping force, high precision and stability, simple structure, light weight, easy processing and miniaturization, and low production cost. Easy to promote.
但是,根据该发明专利公开的技术方案,推动丝杆和推动螺母之间容易出现过紧而卡死或过松而不可靠的技术问题;同时,锁止弹簧片容易与其内孔产生摩擦而影响正常自动夹紧力的形成。 However, according to the technical solution disclosed in the invention patent, the technical problem that the screw rod and the push nut are easily over-tightened and stuck or loose is unreliable; at the same time, the locking spring piece is easily affected by friction with the inner hole. Normal automatic clamping force formation.
发明内容Summary of the invention
本发明所要解决的技术问题之一是现有技术中推动丝杆和推动螺母之间容易过紧或过松;所要解决的技术问题之二是锁止弹簧片容易与其内孔产生摩擦而影响正常自动夹紧力。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.
为解决上述技术问题,本发明提供一种新式自紧钻夹头,其设有钻夹头本体和夹爪,钻夹头本体上设有夹爪孔,夹爪设于夹爪孔中,钻夹头还设有推动丝杆和推动螺母,推动丝杆的外表面设有螺纹,其与推动螺母内表面设有的螺纹相匹配,推动螺母与夹爪相连接,所述推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:2°≤α≤8°。In order to solve the above technical problem, 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 α of the thread and the thread on the inner surface of the push nut is: 2° ≤ α ≤ 8°.
本发明优选的技术方案为:推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:3°48′≤α≤6°44′。A preferred technical solution of the present invention is that the range of the screw angle α of the thread on the outer surface of the screw and the thread on the inner surface of the push nut is: 3°48′≤α≤6°44′.
本发明进一步优选的技术方案为:推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:4°48′≤α≤5°47′。A further preferred technical solution of the present invention is that the range of the screw angle α of the thread on the outer surface of the screw and the thread on the inner surface of the push nut is: 4°48′≤α≤5°47′.
本发明再进一步优选的技术方案为:钻夹头上还设有锁紧装置,锁紧装置包括锁止弹簧片,推动螺母和锁止弹簧片之间设有弹簧。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.
本发明更进一步优选的技术方案为:所述弹簧为塔形弹簧。A still further preferred technical solution of the present invention is that the spring is a tower spring.
本发明技术方案中,在其余部分结构确定的前提下,推动丝杆外表面螺纹和推动螺母内表面螺纹螺旋升角α的取值是实现本发明技术效果的关键之一。如果α的值过小,推动丝杆和推动螺母之间将处于过紧状态,容易卡死;而如果α的值过大,推动丝杆和推动螺母之间将处于过松状态,连接不可靠。本发明由于合理选择了推动丝杆外表面螺纹和推动螺母内表面螺纹螺旋升角的值,从而使推动丝杆和推动螺母之间处于合适的连接状态,不易出现过紧而卡死或过松而不可靠的现象。In the technical solution of the present invention, under the premise that the rest of the structure is determined, the value of pushing the outer surface thread of the screw and the screw helix angle α 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 α 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 α 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.
进一步,本发明由于在推动螺母和锁止弹簧片之间设有弹簧,弹簧松开时,它可张开到未被压缩的尺寸,并将锁止弹簧片推开,使锁止弹簧片脱离其外壳,从而避免锁止弹簧片与其内孔产生摩擦而影响正常自动夹紧力形成的麻烦。Further, in the present invention, since 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.
更进一步,本发明所用的弹簧为塔形弹簧,当塔形弹簧压缩到极限时,其厚度只有塔形弹簧弹簧丝的直径大小,从而使产品的整体小型化。Furthermore, the spring used in the present invention is a tower spring. When the tower spring is compressed to the limit, the thickness of the tower spring is only the diameter of the tower spring spring wire, thereby miniaturizing the overall product.
下面结合附图对本发明做进一步的说明。The invention will be further described below in conjunction with the accompanying drawings.
附图说明DRAWINGS
图1是现有技术中的产品剖视图;Figure 1 is a cross-sectional view of a prior art product;
图2是本发明实施例中的产品装配示意图;Figure 2 is a schematic view showing the assembly of the product in the embodiment of the present invention;
图3是本发明实施例中塔形弹簧的结构示意图。Figure 3 is a schematic view showing the structure of a tower spring in the embodiment of the present invention.
图中,1. 钻夹头本体;1 1. 夹爪稳定销;12. 封闭螺钉;2. 夹爪;23. 长衬套;27. 弹簧;3. 推动螺母;4. 推动丝杆;42. 主机连接孔;5. 锁止弹簧片;6. 锁止压盖;7. 锁止螺母;8. 轴承钢珠;9. 外壳;91. 锁止钢圈;29. 后套。In the figure, 1. 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.
具体实施方式detailed description
实施例1:Example 1:
如图2所示,一种新式自紧钻夹头,包括钻夹头本体1、夹爪2、长衬套23、推动丝杆4、推动螺母3、弹簧27、锁止弹簧片5、后套29、锁止螺母7。As shown in FIG. 2, 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.
钻夹头上斜向地加工有多个贯穿上下两端的夹爪孔,其可以为3个,也可以为3个以上,夹爪2分别滑动装设于夹爪孔中,推动丝杆4的外表面加工有螺纹,推动螺母3沿中轴线加工有与推动丝杆4外表面螺纹匹配的内螺纹,推动螺母3旋接于推动丝杆4上,推动螺母3的外沿下端与夹爪2上端对应的位置沿直径方向加工有开口的T 形沟槽,夹爪2 的上端设有与T 形沟槽相匹配的T形凸头, T 形凸头活动套设于对应的T 形沟槽中。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, and 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.
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为8°。The helix angle α 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°.
本发明使用时,将刀具插入刀具孔中,用手转动外壳9,带动钻夹头本体与连接在设备工作轴上的推动丝杆4相对转动,因为夹爪2套设于夹爪孔中,夹爪2 的上端分别套设于推动螺母3设有的相应的T 形沟槽中,因此外壳与推动丝杆4 的相对转动也迫使推动螺母3随着外壳及钻夹头本体一起同步与推动丝杆4 做相对转动,推动螺母3 在推动丝杆4 的螺纹的作用下向下移动,带动夹爪2 沿夹爪孔向下移动,夹爪2下端之间的空隙也随之缩小,直至夹紧放入刀具孔中的刀具,此时启动设备电机,推动丝杆4 在工作轴的带动下高速旋转,由于钻夹头本体、外壳9和推动螺母3的静止惯性的作用,在推动丝杆4 启动的初始阶段有较强的冲击力以迫使钻夹头本体、外壳9和推动螺母3 跟随其一起转动,这个冲击力进一步使夹爪2夹紧刀具,之后刀具与加工件之间的反作用力,也在迫使钻夹头本体、外壳9和推动螺母3与推动丝杆4 之间做相对转动,这同样自动增加了夹爪2 对刀具的夹持力,因而具备了自紧的功能,使整个自紧钻夹头具有很高的精度和稳定性。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. In relative rotation, 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. 9 and push nut 3 Following the rotation together, this impact force further causes the jaw 2 to clamp the tool, and then the reaction force between the tool and the workpiece also forces the drill chuck body, the outer casing 9 and the push nut 3 and the push screw 4 The relative rotation between them also automatically increases the clamping force of the jaws 2 on the tool, thus providing a self-tightening function, which makes the entire self-tightening chuck with high precision and stability.
当夹紧刀具后,转动锁止螺母7,整个自紧钻夹头被锁死,此时即可实现设备反转,即实现反向加工功能。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.
采用上述技术方案生产的产品,由于推动丝杆4 和钻夹头本体1是活动连接,因而使本发明具有自动夹紧刀具的功能,其夹持力由自紧钻夹头连接的设备的传动轴的转矩和钻夹头本体1的惯性阻力矩及加工时自紧钻夹头夹持的刀具作业时传递的阻力矩相互作用产生,因此夹持力大,并能持续保持,精度和稳定性高。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.
实施例2Example 2
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为6°44′。The helix angle α 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'.
实施例3Example 3
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为5°47′。The helix angle α 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'.
实施例4Example 4
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为4°48′。The helix angle α 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'.
实施例5Example 5
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为3°48′。The helix angle α 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'.
实施例6Example 6
推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α为2°。The helix angle α 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°.
实施例7Example 7
推动丝杆4 的上端设有限位槽,锁止弹簧片5 为一外侧加工有条形缺口的碟形弹簧,锁止弹簧片5和推动螺母3之间设有弹簧27,其优选为塔形弹簧27。而锁止弹簧片5和推动螺母3之间的弹簧27,避免锁止弹簧片5与其内孔产生摩擦而影响正常自动夹紧力形成的麻烦。塔形弹簧27的使用可使产品的整体小型化。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.
本发明由于合理选择了推动丝杆4外表面螺纹和推动螺母3内表面螺纹的螺旋升角α的范围,从而使推动丝杆4和推动螺母3之间处于合适的连接状态。The present invention appropriately selects a range of the screw angle α 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.
表1是取不同螺旋升角α的情况下,采用4-20N•M的力距扳手测得的相关数值。Table 1 shows the relevant values measured with a 4-20 N•M force distance wrench with different helix angles α.
表1 Table 1
实施例 Example 螺旋升角 α Spiral angle α 静态夹紧力 Static clamping force 静态松开力 Static release force 动态夹紧力 Dynamic clamping force
1 1 8 ° 8 ° <1.5 <1.5 <1.5 <1.5 24 twenty four
2 2 6 °44′ 6 °44' 1.6 1.6 1.6 1.6 24 twenty four
3 3 5 °47′ 5 °47' 4.5 4.5 3 3 24 twenty four
4 4 4 °48′ 4 °48' 8.5 8.5 4 4 24 twenty four
5 5 3 °48′ 3 °48' 14 14 8 8 24 twenty four
6 6 2 ° 2 ° 24 twenty four 10.5 10.5 24 twenty four
注:Note:
1、实施例6中,产品具有良好自锁性,静态测得的夹紧力,本是动态工作中夹紧力的再现;1. In the embodiment 6, the product has good self-locking property and the statically measured clamping force is the reproduction of the clamping force during dynamic working;
2、实施例1中,产品无自锁性,动态工作时胜任了实施例6中产品可完成的任务。2. In the first embodiment, 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.
应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,都属于本发明的保护范围。It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims (5)

  1. 一种新式自紧钻夹头,其设有钻夹头本体和夹爪,钻夹头本体上设有夹爪孔,夹爪设于夹爪孔中,钻夹头还设有推动丝杆和推动螺母,推动丝杆的外表面设有螺纹,其与推动螺母内表面设有的螺纹相匹配,推动螺母与夹爪相连接,其特征在于,所述推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:2°≤α≤8°。 The utility model relates to a new self-tightening drill chuck, which is provided with a drill chuck body and a clamping jaw. The drill chuck body is provided with a clamping claw hole, and the clamping jaw is arranged in the clamping claw hole, and the drilling chuck is further provided with a pushing screw rod and Pushing the nut, pushing the outer surface of the screw to be 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, wherein the outer thread of the push rod and the push nut are The range of the helix angle α of the surface thread is: 2° ≤ α ≤ 8°.
  2. 根据权利要求1 所述的新式自紧钻夹头,其特征在于推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:3°48′≤α≤6°44′。According to claim 1 The novel self-tightening chuck is characterized in that the range of the screw angle α of the thread on the outer surface of the screw and the thread on the inner surface of the push nut is: 3°48′≤α≤6°44′.
  3. 根据权利要求2 所述的新式自紧钻夹头,其特征在于推动丝杆外表面螺纹和推动螺母内表面螺纹的螺旋升角α的范围为:4°48′≤α≤5°47′。According to claim 2 The novel self-tightening drill chuck is characterized in that the range of the screw lift angle α of the thread for pushing the outer surface of the screw rod and the thread of the inner surface of the push nut is: 4°48′≤α≤5°47′.
  4. 根据权利要求1或3所述的新式自紧钻夹头,其特征在于所述钻夹头上还设有锁紧装置,锁紧装置包括锁止弹簧片,推动螺母和锁止弹簧片之间设有弹簧。A new self-tightening drill chuck according to claim 1 or 3, wherein the drill chuck is further provided with a locking device, the locking device comprises a locking spring piece, between the push nut and the locking spring piece Spring is provided.
  5. 根据权利要求3所述的新式自紧钻夹头,其特征在于所述弹簧为塔形弹簧。A new self-tightening drill chuck according to claim 3, wherein said spring is a tower spring.
PCT/CN2011/082514 2011-09-02 2011-11-21 Novel self-tightening drill chuck WO2013029312A1 (en)

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
CN201110260884.0 2011-09-02

Publications (1)

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

Family

ID=45542723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/082514 WO2013029312A1 (en) 2011-09-02 2011-11-21 Novel self-tightening drill chuck

Country Status (2)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US11344954B2 (en) * 2018-03-21 2022-05-31 Apex Brands, Inc. Chuck with automatic jaw adjustment
CN109940200A (en) * 2019-04-28 2019-06-28 柳尧亭 The method of arrangement of clutch, drill chuck, power tool and drill chuck Double-directional rotary

Citations (7)

* 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
GB2199776A (en) * 1986-12-31 1988-07-20 Jacobs Mfg Co Self tightening drill chuck
EP1380372A1 (en) * 2002-07-08 2004-01-14 The Boeing Company 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
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1089285C (en) * 1998-04-07 2002-08-21 游友容 Self fastening drill chuck
CN2361415Y (en) * 1999-01-13 2000-02-02 来雷 Bench lathe locking device
US8403339B2 (en) * 2008-06-18 2013-03-26 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

Patent Citations (7)

* 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
GB2199776A (en) * 1986-12-31 1988-07-20 Jacobs Mfg Co Self tightening drill chuck
EP1380372A1 (en) * 2002-07-08 2004-01-14 The Boeing Company 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
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

Also Published As

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

Similar Documents

Publication Publication Date Title
WO2013029312A1 (en) Novel self-tightening drill chuck
US4660841A (en) Hand tightenable device for holding a cutting implement
US20110227299A1 (en) Self-Tightening Drill Chuck
JPH0655315A (en) Chuck with drive bit socket
EP3456449B1 (en) Gear self-tightening drill chuck
CN1242725A (en) Collet chuck device
CN208961060U (en) A kind of radial direction sleeve boring grab
CN104439414A (en) Drilling clamping device
WO2014094201A1 (en) Self-locking wrench drill chuck
WO2014012215A1 (en) Novel drill chuck
WO2014012238A1 (en) Novel drill chuck
JP5325644B2 (en) Lathe chuck device and centering method thereof
JP3083291B1 (en) Tool holder
US2315524A (en) Positive drive chuck
JP2008126364A (en) Tap fastening structure and tap fastening method
WO2012097664A1 (en) Drill bit grinder
CN214868889U (en) Screw drilling clamp
CN204603819U (en) Bore bit sludge groove milling fixture
WO2019223670A1 (en) Gripper assembly and drill chuck
TW202015838A (en) Milling chuck having detachable components
CN211361513U (en) Clamp for down-the-hole drill finish turning of big end excircle
CN216504763U (en) Lathe collet wrench
US20060091620A1 (en) Chuck device
CN214263908U (en) Lathe convenient to turning flange blind plate
WO2014022987A1 (en) Drill chuck

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