WO2014094201A1 - 自紧扳手钻夹头 - Google Patents

自紧扳手钻夹头 Download PDF

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Publication number
WO2014094201A1
WO2014094201A1 PCT/CN2012/086749 CN2012086749W WO2014094201A1 WO 2014094201 A1 WO2014094201 A1 WO 2014094201A1 CN 2012086749 W CN2012086749 W CN 2012086749W WO 2014094201 A1 WO2014094201 A1 WO 2014094201A1
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WO
WIPO (PCT)
Prior art keywords
wrench
drill chuck
front body
self
sleeve
Prior art date
Application number
PCT/CN2012/086749
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English (en)
French (fr)
Inventor
柳尧亭
徐桂洪
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.)
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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 PCT/CN2012/086749 priority Critical patent/WO2014094201A1/zh
Publication of WO2014094201A1 publication Critical patent/WO2014094201A1/zh

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    • 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 clamp for a machining tool, and more particularly to a self-tightening drill chuck capable of self-tightening.
  • Drilling and milling are often used in production and processing activities, such as machine tools and electric drills.
  • the drill chucks used to hold the drills, milling cutters, etc. on the working axes of these equipments have experienced long-term application and improvement.
  • the types of drill chucks on the market and their respective advantages and disadvantages are as follows:
  • the advantages of the drill chuck are: small size, light weight, simple operation and low cost; the disadvantages are: small clamping force, small application range, and only suitable for low power equipment.
  • the wrench drills the chuck.
  • the advantage of the drill chuck is that the volume can be large or small, the clamping force is slightly larger than the hand tight drill chuck, the cost is low, and the application range is wide; the disadvantage is that on the high-power equipment, it is easy to appear due to insufficient clamping force. The phenomenon of slipping without the bit can not continue working.
  • the advantage of the drill chuck is that the clamping force is large, and there is no possibility of slipping and being unable to work; the disadvantage is that it is bulky and cumbersome, and is suitable only for larger and larger devices, and the application range is narrow, and the market is broad. Small and medium-sized devices are unusable and costly.
  • Each of these types of drill chucks has its own problems, or the clamping force is small, or the scope of application is small, or the cost is high. At present, there is no more comprehensive and comprehensive drill chuck. Applicable to almost all conditions.
  • the invention is based on the improvement of the wrench drill chuck, so that it can have a sufficient clamping force on the basis of the original advantages, and becomes a full-function drill chuck.
  • the invention is directed to the technical problem that the existing wrench drill chuck has a small clamping force, and provides a self-tightening wrench drill chuck capable of providing a sufficiently large clamping force.
  • the present invention is provided with a precursor, a nut, a jaw, a back sleeve and a wrench
  • the front body is provided with a jaw hole
  • the jaw is located in the jaw hole
  • the silk sleeve is arranged on the front body
  • the silk mother is provided
  • the internal thread of the nut is provided with the external thread of the jaw, the internal thread of the nut is matched with the external thread of the jaw;
  • the nut is also provided with the wire female tooth, the wrench is provided with the wrench tooth and the wrench protrusion, and the front body is provided with a wrench.
  • the self-tightening wrench drill chuck is further provided with a rear body, and the rear body and the front body cooperate with each other along the central axis direction thereof.
  • the rear body is fixedly connected with the rear sleeve, the rear sleeve is fixedly connected with the silk mother; a bearing and a bearing pad are arranged between the silk mother and the front body, and a ball is arranged between the front body and the rear body.
  • the wrench is further provided with a connecting rod, and the connecting rod is provided with a through hole.
  • a further preferred technical solution of the present invention is that the wrench further has a grip bar, and the connecting rod is connected to the grip bar, and the grip bar is formed in a cross shape.
  • a further preferred technical solution of the present invention is that the rear body is provided with a rear body spring groove, and the front body is provided with a front body spring groove, and the front body spring groove and the rear body spring groove correspond to each other to form a complete spring groove.
  • the complete spring groove is provided with a circlip.
  • a further preferred technical solution of the present invention is that the front body is provided with a front annular groove, and the rear body is provided with a rear body annular groove.
  • the front annular groove and the rear annular groove respectively form a complete annular groove, and the complete annular ring Balls are provided in the slots.
  • a further preferred technical solution of the present invention is to provide a silk sleeve between the back sleeve and the silk core.
  • the back sleeve is fixedly connected to the silk sleeve, and the silk sleeve is fixedly connected to the nut.
  • a further preferred technical solution of the present invention is that the rear body is integrated with the rear sleeve.
  • a further preferred technical solution of the present invention is that the front end of the precursor is provided with an annular oil pool, and the annular oil pool is provided with grease, and the grease is in contact with the jaws.
  • the invention Since the original wrench drill chuck is changed into a self-tightening drill chuck, the clamping force of the original wrench drill chuck is greatly increased, so that the drill chuck does not slip during work, and at the same time,
  • the invention also retains the advantages of the original wrench drill chuck, for example, the phenomenon that the self-tightening chuck often occurs during the use of the stuck chuck, the invention is due to the use of the silk mother and the matching with the silk mother.
  • the wrench can match the wrench with the nut after the drill chuck is stuck, and the drill chuck can be easily opened by turning the wrench; the invention can be made into different sizes according to the needs to meet the needs of different machines and equipment.
  • the utility model has wide application range; the invention is based on the improvement of the wrench drill chuck, and is formed for the self-tightening chuck, the structure is simple and easy to operate, and the cost is much lower than the existing self-tightening chuck.
  • Figure 1 is a partially cutaway perspective view of the present invention
  • Figure 2 is a half cross-sectional view of the front view of the present invention.
  • FIG. 3 is a schematic structural view of a wrench of the present invention.
  • Figure 4 is a perspective view of a precursor of the present invention.
  • Figure 5 is a half cross-sectional view of the front view of the precursor of the present invention.
  • Figure 6 is a perspective view of the rear body of the present invention.
  • Figure 7 is a half cross-sectional view of the front view of the rear body of the present invention.
  • Figure 8 is a perspective view of the silk mother of the present invention.
  • Figure 9 is a half cross-sectional view of the front view of the silk mother of the present invention.
  • Figure 10 is a perspective view of the jaw of the present invention.
  • Figure 11 is a plan view of the jaw of the present invention.
  • Figure 12 is a schematic structural view of a bearing pad of the present invention.
  • Figure 13 is a schematic structural view of a bearing of the present invention.
  • Figure 14 is a half cross-sectional view showing a front view of the back cover of the present invention.
  • the present invention includes a drill chuck body 1 and a wrench 2.
  • the drill chuck body 1 mainly includes a front body 3, a rear body 4, a silk nut 5, a jaw 6 and a rear sleeve 7.
  • the rear body 4 partially protrudes into the front body 3 and cooperates with the front body 3;
  • the front body 3 is provided with three evenly distributed jaw holes 8 respectively, and the three clamping jaws 6 are respectively located in the three jaw holes 8;
  • the mother 5 sets are disposed on the front body 3 and cooperate with the front body 3 and the three clamping jaws 6;
  • the rear sleeve 7 is sleeved on the main body of the drill chuck after the front body 3, the rear body 4 and the silk core 5 are fitted.
  • the rear sleeve 7 which is interference-fitted with the rear body 4 also rotates, thereby driving the nut 5 which is in interference fit with the rear sleeve 7 to rotate, since the nut 5 and the jaw 6 pass the thread.
  • the front body 3 is held in cooperation with each other, so that when the nut 5 is rotated, the jaws 6 follow the nut 5 to move up and down in the jaw hole 8.
  • the front body 3 is provided with cylindrical holes 12, the number of which is three, and the inner diameters thereof may be uniform or inconsistent; when the inner diameters are inconsistent, even if the wrench 2 is lost, any suitable tool may be inserted into the cylindrical holes 12 instead of the wrench. .
  • the wrench 2 is divided into two parts: a grip bar 30 and a connecting rod 31.
  • a cylinder 11 is disposed at one end of the connecting rod 31, and a wrench tooth 10 uniformly distributed along the circumferential direction of the connecting rod 31 is disposed adjacent to the cylinder 11; as shown in FIG. 8 and FIG. 9, the nut 5 is annular, and is provided.
  • the grip bar 30 of the wrench 2 can be arranged in a cross shape, so that it is very convenient when the rotary wrench is forced; the wrench 2 can also only have the connecting rod 31, only the end opposite to the wrench tooth 10 on the connecting rod 31. Set a through hole so that when the wrench is stuck and needs to be opened, you can freely pick up the things that can pass through the through hole and pass through the through hole, and then rotate it with force.
  • the left end of the front body 3 is provided with a groove 13 around its central axis, and when the rear body 4 is inserted into the front body 3, the right end portion of the rear body 4 is exactly the groove of the front body 3. 13 cooperate with each other.
  • a front body spring groove 16 is formed in the groove 13 of the front body 3, and a front body spring groove 17 is formed in a portion of the rear body 4 that extends into the front body 3, as shown in FIG.
  • the front retaining spring groove 16 is just opposite to the rear body retaining groove 17
  • the circlip spring is opened and a part enters into the front body spring groove 16, so that the front body 3 and the rear body 4 are formed in a fixed connection along the direction of their central axis, that is, the front body 3 and the rear.
  • the body 4 is combined as a whole, and the front body 3 can only be rotated radially with respect to the rear body 4, and cannot be laterally moved.
  • the mated precursor 3 and the rear body 4 are as shown in Figs. 1 and 2.
  • a ball to limit the connection thereof, for example, a front body annular groove is provided on the front body 3, and the rear body 4 is provided.
  • the rear annular groove is provided, and the front annular groove and the rear annular groove cooperate to form a complete annular groove, and a plurality of balls are placed in the complete annular groove, half of the balls are in the front annular groove, and the other half is
  • the rear body is in the annular groove, so that the limit between the front body 3 and the rear body 4 is played, and the sliding friction between the front body 3 and the rear body 4 can also be changed into rolling friction, so that the drill chuck is more flexible.
  • a front body groove 19 is further provided at the left end of the front body 3, and a rear body groove 20 is further provided on the rear body 4, and the ball 21 as shown in FIG. 2 is placed in the front body groove 19, after After the body 4 enters the front body 3 and cooperates with it, the front body groove 19 corresponds to the rear body groove 20, and the other half of the ball 21 enters the rear body groove 20, and the fitted front body 3 and The rear body 4 is as shown in FIG. 1 and FIG. 2, so that after the front body 3 and the rear body 4 are combined, the frictional force of the radial rolling between the two is changed from the original sliding friction to the rolling friction, which is greatly reduced. The friction between the two is reduced, which increases the flexibility of the drill chuck.
  • the ball 21 can be disposed at any portion where the front body 3 is in contact with the rear body 4, and does not affect the relative rotation between the two.
  • the front body 3 is machined obliquely symmetrically with three jaw holes 8 extending through the upper and lower sides, and the jaws 6 provided with the external threads 15 of the jaws as shown in Figs. 10 and 11 are located in the jaw holes 8.
  • a cutter hole 22 is disposed in the front end of the front body 3, and is in communication with the groove 13 in which the rear body 4 is located. When the communication is made, a retaining screw can be disposed in the through hole, which can prevent the rear body 4 and the working device. Slippage; there may be no connection between the two, and it is only necessary to shorten the lateral length of at least one of the groove 13 and the cutter hole 22.
  • the dust that the drill chuck bulges during the operation can be prevented from entering the rear portion of the drill chuck, effectively separating the dust, and the cutter can be directly placed on the rear body 4. Damage to the rear body 4.
  • the front body 3 is further provided with a bearing pad recess 23 and a bearing recess 24, and the bearing pad 25 shown in FIG. 12 is sleeved on the bearing pad recess 23, and the bearing 26 shown in FIG. 13 is sleeved in the bearing concave.
  • the bearing pads 25 are in close proximity to the bearings 26.
  • the precursor 3 is further provided with a thread groove 27, and the nut 5 shown in Fig. 9 is further provided with a female internal thread 14 (not shown in Fig. 8), and the nut 5 is placed in the nut groove 27.
  • the inside of the left end of the rear body 4 is further provided with a main body connecting hole 29 in the direction of the central axis.
  • the main connecting hole 29 is provided with a thread (not shown), which cooperates with the thread on the working shaft of the main body. When the main working shaft rotates, the rear body 4 is rotated together.
  • the present invention is further provided with a rear sleeve 7 which is bent inward in the direction of the central axis at the left end of the rear sleeve 7 to form a rear sleeve recess 28, and the left end portion of the rear body 4 is located in the rear sleeve recess 28
  • the interference between the rear body 4 and the rear sleeve 7 is an interference fit
  • the right end of the rear sleeve 7 and the silk nut 5 also have an interference fit.
  • the back sleeve 7 with its interference fit will also rotate along with it, thereby rotating the nut 5 with the interference fit of the rear sleeve 7 to further rotate the jaw 6 in the jaw hole 8. Do up and down.
  • the main body connecting hole 29 of the rear body 4 is connected with the working shaft of the main body, and the device motor is started at this time, and the rear body 4 is rotated at a high speed by the working shaft, due to the rear body 4, the rear sleeve 7, the nut 5 and the clamping jaw.
  • the static inertia between 6 has a strong impact force at the beginning of the rotation of the rear body 4, forcing the rear sleeve 7, the nut 5 and the jaws 6 to move together, and this impact force further causes the three jaws 6 to move.
  • the reaction between the tool and the workpiece also forces relative rotation between the jaw 6, the nut 5, the rear sleeve 7 and the rear body 4, which also increases the clamping of the three jaws 6 to the tool.
  • the force is self-tightening, so that the entire drill chuck has high precision and stability. As the motor rotates, the three jaws 6 are gradually rotated together to complete the machining process.
  • the structure of the second embodiment of the present invention is substantially the same as that of the first embodiment, and the same portions are not repeatedly described.
  • the second embodiment differs from the first embodiment mainly in that: in the second embodiment, the back cover 7 no longer with silk 5 direct contact, but the back sleeve 7 and an silk female sleeve interference fit, the silk female sleeve and the silk mother 5 interference fit.
  • the structure of the third embodiment of the present invention is basically the same as that of the first embodiment, and the same portions are not repeatedly described.
  • the third embodiment differs from the first embodiment mainly in that: in the third embodiment, the back cover 7 no longer cooperates with the rear body 4, but directly integrates the rear sleeve 7 and the rear body 4 into a new rear body, and the new rear body drives the rotation of the silk nut 5.
  • the front end of the precursor 3 may be machined with an annular oil pool which may be continuous or may be disposed in correspondence with the three jaws 6 to be in a discontinuous state.
  • the annular oil pool is sealed with grease to ensure that the jaws 6 can cut the grease of the inner ring of the annular oil pool during the up and down movement, which will greatly reduce the friction between the entire jaw 6 and the front body 3. , prolonging the flexibility of the jaws 6, thereby extending the life of the drill chuck.
  • a sealing device such as a front sleeve or a fixed sleeve may be provided on the outside of the annular oil pool to ensure that the grease does not leak outward.
  • the precursor 3 and the rear body 4 of the present invention are fixed by a snap spring 18, and the front body 3 and the rear body 4 can also be fixed by other means, such as a key, and only the front body 3 and the rear body need to be secured. 4 can be rotated in the direction along their central axis, that is, in the lateral direction, and can be rotated in the radial direction.
  • the rear sleeve 4 is driven by the rear body 4, and then the rear sleeve 7 drives the nut 5 so that the jaws 6 which cooperate with the nut 5 are moved up and down, and the manner of driving the jaws 6 up and down can be increased.
  • the rear body 4 may be provided with a thread, and the rear body 4 is directly or indirectly threadedly engaged with the thread of the jaw 6 so that the rotation of the rear body 4 can directly or indirectly drive the up and down movement of the jaw 6;
  • the top of the jaw 6 can be fixed to the rear body 4, and the rotation of the rear body 4 drives the jaw 6 to move up and down in the jaw hole 8.

Abstract

一种自紧扳手钻夹头，设有前体（3）、丝母（5）、夹爪（6）、后套（7）和扳手（2）。前体（3）设有夹爪孔（8），夹爪（6）位于夹爪孔（8）内。丝母（5）套设在前体（3）上，丝母（5）设有丝母内螺纹（14），夹爪（6）设有夹爪外螺纹（15），丝母内螺纹（14）与夹爪外螺纹（15）相互配合。丝母（5）还设有丝母齿（9），扳手（2）设有扳手齿（10）和扳手凸起（11），前体（3）设有扳手孔（12），丝母齿（9）与扳手齿（10）相互配合，扳手凸起（11）与扳手孔（12）相互配合。自紧扳手钻夹头还设有后体（4），后体（4）与前体（3）在沿它们的中轴线方向相互配合从而形成限位连接。后体（4）与后套（7）固定连接，后套（7）与丝母（5）固定连接。丝母（5）与前体（3）之间设有轴承（26）和轴承垫（25），前体（3）与后体（4）之间设有滚珠（21）。自紧扳手钻夹头可广泛应用于机械加工领域。

Description

自紧扳手钻夹头
技术领域
本发明涉及一种机械加工用刀具的夹具，尤其是涉及一种能够自紧的自紧扳手钻夹头。
背景技术
生产加工活动中经常使用机床、电钻等工具进行钻孔、铣削等作业，装设在这些设备主机工作轴上用于夹持钻头、铣刀等刀具的钻夹头虽然经历了长期的应用和改进，但依然存在诸多不足。现在市面上的钻夹头的种类及各自的优缺点如下：
第一，手紧钻夹头。这种钻夹头的优点是：体积小，重量轻，操作简单，成本低廉；其缺点是：夹紧力小，适用范围小，只适合小功率的设备。
第二，扳手钻夹头。这种钻夹头的优点是：体积可大可小，夹紧力稍大于手紧钻夹头，成本低廉，适用范围广；其缺点是：在大功率设备上，还是容易出现由于夹紧力不足夹不住钻头而打滑的现象，无法继续工作下去。
第三，自紧钻夹头。这种钻夹头的优点是：夹紧力大，不会出现打滑而无法工作的情况；其缺点是：体积大而笨重，只适合较大型以上的设备，适用范围很窄，而市场广阔的中小型设备无法使用，且造价高昂。
这几种类型的钻夹头每一种都存在各自的问题，或是夹紧力小，或是适用范围小，或是成本高，目前还没有功能比较全面、比较综合的钻夹头，能够适用几乎所有的工况。本发明就是在扳手钻夹头的基础上进行改进，使其在具有原来优点的基础上，也能够具有足够大的夹紧力，成为功能全面的钻夹头。
发明内容
本发明是针对现有扳手钻夹头存在夹紧力小的技术问题，提供一种能够提供足够大的夹紧力的自紧扳手钻夹头。
为此，本发明设有前体、丝母、夹爪、后套和扳手，前体设有夹爪孔，夹爪位于夹爪孔内；丝母套设在前体上，丝母设有丝母内螺纹，夹爪设有夹爪外螺纹，丝母内螺纹与夹爪外螺纹相互配合；丝母还设有丝母齿，扳手设有扳手齿和扳手凸起，前体设有扳手孔，丝母齿与所述扳手齿相互配合，扳手凸起与所述扳手孔相互配合；自紧扳手钻夹头还设有后体，后体与前体在沿它们的中轴线方向相互配合从而形成限位连接；后体与后套固定连接，后套与丝母固定连接；丝母与前体之间设有轴承和轴承垫,前体与所述后体之间设有滚珠。
本发明优选的技术方案是扳手还设有连接杆，连接杆上设有通孔。
本发明进一步优选的技术方案是扳手还设有手握杆，连接杆与手握杆相连，手握杆成十字形。
本发明进一步优选的技术方案是后体上设有后体卡簧槽，前体上设有前体卡簧槽，前体卡簧槽与后体卡簧槽相互对应形成一个完整的卡簧槽，该完整的卡簧槽内设有卡簧。
本发明进一步优选的技术方案是前体上设有前体环形槽，后体上设有后体环形槽，前体环形槽与后体环形槽相互对应形成一个完整的环形槽，该完整的环形槽内设有滚珠。
本发明进一步优选的技术方案是后套与丝母之间还设有丝母套。
本发明进一步优选的技术方案是后套与丝母套固定连接，丝母套与丝母固定连接。
本发明进一步优选的技术方案是后体与后套成一体。
本发明进一步优选技术的方案是前体的前端设有环形油池，环形油池内设有润滑脂，润滑脂与夹爪接触。
由于本发明将原来的扳手钻夹头改成了自紧钻夹头，大大的增加了原来扳手钻夹头所具有的夹紧力，使得钻夹头在工作中不会出现打滑的现象，同时本发明还保留了原有扳手钻夹头的优点，例如：对于自紧钻夹头使用过程中经常出现的卡死而打不开的现象，本发明由于使用了丝母以及与丝母相配合的扳手，可以在钻夹头卡死后将扳手与丝母相配合，转动扳手就可轻易地将钻夹头打开；本发明可以根据需要制成大小不同的样式，满足不同机器设备的需要，适用范围很广泛；本发明是在扳手钻夹头的基础上做出的改进而成为了自紧钻夹头，结构简单，容易操作，比现有的自紧钻夹头成本要低很多。
附图说明
图1是本发明部分剖开的立体图；
图2是本发明正视图的半剖视图；
图3是本发明扳手的结构示意图；
图4是本发明前体的立体图；
图5是本发明前体正视图的半剖视图；
图6是本发明后体的立体图；
图7是本发明后体正视图的半剖视图；
图8是本发明丝母的立体图；
图9是本发明丝母正视图的半剖视图；
图10是本发明夹爪的立体图；
图11是本发明夹爪的俯视图；
图12是本发明轴承垫的结构示意图；
图13是本发明轴承的结构示意图；
图14是本发明后套的正视图的半剖视图。
图中符号说明：
1.钻夹头本体；2.扳手；3.前体；4.后体；5.丝母；6.夹爪；7.后套；8.夹爪孔；9.丝母齿；10.扳手齿；11.圆柱；12.圆柱孔；13.凹槽；14.丝母内螺纹；15.夹爪外螺纹；16.前体卡簧槽；17.后体卡簧槽；18.卡簧；19.前体凹槽；20.后体凹槽；21.滚珠；22.刀具孔；23.轴承垫凹台；24.轴承凹台；25.轴承垫；26.轴承；27.丝母槽；28.后套凹槽；29.主机连接孔；30.手握杆；31连接杆。
具体实施方式
现在，参照附图详细说明本发明的具体实施方式。
第一实施例
如图1、图2和图3所示，本发明包括钻夹头本体1和扳手2。钻夹头本体1主要包括前体3、后体4、丝母5、夹爪6和后套7。后体4部分伸入到前体3中并与前体3相互配合；前体3上设有三个均匀分布的夹爪孔8，三个夹爪6分别位于三个夹爪孔8中；丝母5套设于前体3上并与前体3和三个夹爪6相互配合；后套7套设于前体3、后体4和丝母5配合后的钻夹头主体上。
在主机带动后体4旋转时，与后体4过盈配合的后套7也会跟着旋转，从而带动与后套7过盈配合的丝母5旋转，由于丝母5与夹爪6通过螺纹相互配合而前体3保持不动，所以在丝母5旋转时，夹爪6会跟随丝母5在夹爪孔8中上下运动。
前体3上设有圆柱孔12，其数量为3个，其内径可以一致，也可以不一致；当内径不一致时，即使扳手2丢失，也可用任意适合的工具插入到圆柱孔12中，代替扳手。
如图3所示，扳手2分为手握杆30和连接杆31两部分。在连接杆31的一端设有圆柱11，与圆柱11相邻设有沿连接杆31圆周方向均匀分布的扳手齿10；如图8和图9所示，丝母5呈圆环状，其设有丝母齿9；在钻夹头本体1与扳手2相互配合将钻夹头本体1打开时，圆柱11进入到圆柱孔12中，扳手2的扳手齿10与丝母5的丝母齿9相互配合，用手握住扳手2的手握杆30然后旋转，这样就会带动丝母5一起旋转，进一步使得夹爪6移动，从而将锁紧的钻夹头打开。
另外，扳手2的手握杆30可以设置成十字形，这样在旋转扳手用力的时候会感到十分方便；扳手2也可以只有连接杆31，只需在连接杆31上与扳手齿10相对的一端设置一个通孔，这样在扳手卡死需要将其打开时，可以随意拿起身边能够穿过此通孔的东西穿过此通孔，然后用力旋转即可。
如图4至图7所示，前体3的左端内部围绕其中轴线设有凹槽13，在后体4插入到前体3中时，后体4的右端部分正好与前体3的凹槽13相互配合。在前体3的凹槽13内设有大于凹槽直径的前体卡簧槽16，在后体4的右端伸入进前体3的部分设有后体卡簧槽17，将如图1和图2中所示的卡簧18放置在后体卡簧槽17中并捏紧，将后体4插入到前体3中后，前体卡簧槽16正好与后体卡簧槽17相互对应，此时卡簧弹开，一部分进入到前体卡簧槽16中，这样就使得前体3与后体4在沿它们的中轴线方向即横向形成了固定连接，使前体3与后体4结合为一个整体，前体3相对于后体4只能做径向转动，而不能够横向移动，配合后的前体3和后体4如图1和图2所示。
除用卡簧17来对前体3和后体4进行限位连接外，也可以用滚珠来对它们进行限位连接，例如：在前体3上设有前体环形槽，后体4上设有后体环形槽，前体环形槽与后体环形槽相互配合形成一个完整的环形槽，在此完整的环形槽内放置若干个滚珠，滚珠的一半在前体环形槽内，另一半在后体环形槽内，这样就对前体3与后体4之间起到了限位作用，同时也可以使前体3与后体4之间的滑动摩擦变为滚动摩擦，使钻夹头更加灵活。
在前体3的左端还设有前体凹槽19，在后体4上还设有后体凹槽20，将如图2中所示的滚珠21放置在前体凹槽19中，在后体4进入到前体3中并与其相互配合后，前体凹槽19与后体凹槽20正好相对应，滚珠21的另一半进入到后体凹槽20中，配合后的前体3和后体4如图1和图2所示，这样，在前体3与后体4结合后，两者之间径向滚动的摩擦力就由原来的滑动摩擦变成了滚动摩擦，大大的减小了两者之间的摩擦力，从而增加了钻夹头的灵活性。滚珠21可以设置在任何前体3与后体4接触的部位，不影响两者之间能够相对转动即可
前体3上斜向对称的加工有三个贯穿上下的夹爪孔8，如图10和图11所示的设有夹爪外螺纹15的夹爪6就位于夹爪孔8内。在前体3的前端内部设有刀具孔22，其与后体4所在的凹槽13是相通的，相通时可在此通孔内设置防脱螺钉，其可以防止后体4与工作设备之间滑脱；两者之间也可以不相通，只需将凹槽13和刀具孔22中至少一个的横向长度做短一些即可。在凹槽13和刀具孔22不相通时，可以防止钻夹头在作业时鼓起的灰尘进入到钻夹头的后部，有效的隔离掉灰尘，也可以免除刀具直接顶在后体4上对后体4造成的破坏。
前体3上还设有轴承垫凹台23和轴承凹台24，如图12所示的轴承垫25套设在轴承垫凹台23上，如图13所示的轴承26套设在轴承凹台24上，轴承垫25与轴承26紧密相邻。前体3上还设有丝母槽27，如图9所示的丝母5上还设有丝母内螺纹14(图8中未示出)，当丝母5放置在丝母槽27中后，丝母5的丝母内螺纹14与夹爪孔8内的夹爪6上的夹爪外螺纹15相互配合，同时丝母5的左端与轴承26压紧在一起，这样，在丝母5旋转时，其与前体3之间的摩擦力就由滑动摩擦变成了滚动摩擦，从而进一步增加了整个钻夹头的灵活性，轴承垫25和轴承26位于前体3与丝母5之间，配合后的前体3、轴承垫25、轴承26和丝母5如图1和图2所示。
如图7所示，后体4左端内部沿中轴线方向还设有主机连接孔29，主机连接孔29内设有螺纹（图中未示出），其与主机工作轴上的螺纹相互配合，在主机工作轴旋转时，就会带动后体4一起旋转。
如图14所示，本发明还设有后套7，在后套7的左端沿中轴线方向向内弯曲形成了后套凹槽28，后体4的左端部分正好位于后套凹槽28内，并且后体4与后套7之间为过盈配合，后套7的右端与丝母5之间也为过盈配合。这样在后体4旋转时，与其过盈配合的后套7也会跟随其一起旋转，从而带动与后套7过盈配合的丝母5进行旋转，进一步带动夹爪6在夹爪孔8内做上下运动。
下面对本发明的工作过程加以说明：
将刀具插入前体3的刀具孔22中，用手握住前体3，然后转动后套7，因为丝母5与后套7之间为过盈配合，两者之间为固定连接，丝母5会跟着后套7的旋转而旋转，又因为丝母5与夹爪6通过螺纹相互连接，夹爪6位于前体3的夹爪孔8内，所以丝母5的转动就会带动夹爪6沿夹爪孔8向下运动，三个夹爪6下端之间的空隙也随之缩小，直至夹紧放入刀具孔22内的刀具。
将后体4的主机连接孔29与主机的工作轴相连接，此时启动设备电机，后体4在工作轴的带动下高速旋转，由于后体4、后套7、丝母5和夹爪6之间的静止惯性作用，在后体4刚开始转动的阶段有较强的冲击力迫使后套7、丝母5和夹爪6跟随其一起运动，这个冲击力进一步使得三个夹爪6夹紧刀具，之后刀具与加工件之间的反作用力也在迫使夹爪6、丝母5、后套7和后体4之间做相对转动，这同样增加了三个夹爪6对刀具的夹持力，因而具备了自紧的功能，使整个钻夹头具有很高的精度和稳定性，随着电机的转动，三个夹爪6夹紧刀具一起逐渐转动，从而完成机械加工过程。
第二实施例
本发明的第二实施例的结构基本与第一实施例结构相同，相同部分不再重复描述，第二实施例与第一实施例的不同之处主要在于：在第二实施例中，后套7不再与丝母 5直接接触，而是后套7与一个丝母套过盈配合，该丝母套再与丝母5过盈配合。
第三实施例
本发明的第三实施例的结构基本与第一实施例结构相同，相同部分不再重复描述，第三实施例与第一实施例的不同之处主要在于：在第三实施例中，后套7不再与后体4过盈配合，而是直接将后套7与后体4做成一体，成为一个新的后体，由该新的后体驱动丝母5的旋转。
在以上几种实施例中，前体3的前端可以加工有环形油池，该环形油池可以为连续的，也可以与三个夹爪6相对应设置而表现为不连续的状态。环形油池中封有润滑脂，保证夹爪6在上下运动的过程中能够切到环形油池内环的润滑脂，这样就会使得整个夹爪6与前体3之间的摩擦力大大减小，延长了夹爪6灵活性的时间，进而延长了钻夹头的使用寿命。在环形油池的外面可以设置前套或者固定套等密封装置来保证润滑脂不会向外泄漏。
本发明前体3与后体4之间是通过卡簧18来固定的，前体3与后体4之间也可以采用其它的方式来固定，例如键，只需要保证前体3与后体4在沿它们的中轴线方向即横向不能分离而径向能够转动即可。
另外，本发明是通过后体4带动后套7，再由后套7带动丝母5从而使与丝母5相配合的夹爪6做上下运动，驱动夹爪6上下运动的方式可以有多种，例如，可以在后体4上设置螺纹，后体4直接或间接通过螺纹与夹爪6的螺纹相配合，这样后体4的转动就可以直接或间接的带动夹爪6的上下运动；又例如可以将夹爪6的顶部固定在后体4上，通过后体4的旋转来带动夹爪6在夹爪孔8内做上下运动。
惟以上所述者，仅为本发明的具体实施例而已，当不能以此限定本发明实施的范围，故其等同组件的置换，或依本发明专利保护范围所作的等同变化与修改，皆应仍属本发明权利要求书涵盖之范畴。

Claims (9)

  1. 一种自紧扳手钻夹头，其设有前体、丝母、夹爪、后套和扳手，所述前体设有夹爪孔，所述夹爪位于所述夹爪孔内；所述丝母套设在所述前体上，所述丝母设有丝母内螺纹，所述夹爪设有夹爪外螺纹，所述丝母内螺纹与所述夹爪外螺纹相互配合；所述丝母还设有丝母齿，所述扳手设有扳手齿和扳手凸起，所述前体设有扳手孔，所述丝母齿与所述扳手齿相互配合，所述扳手凸起与所述扳手孔相互配合，其特征是所述自紧扳手钻夹头还设有后体，所述后体与所述前体在沿它们的中轴线方向相互配合并形成限位连接；所述后体与所述后套固定连接，所述后套与所述丝母固定连接；所述丝母与所述前体之间设有轴承和轴承垫, 所述前体与所述后体之间设有滚珠。
  2. 根据权利要求1所述的自紧扳手钻夹头，其特征在于所述扳手还设有连接杆，所述连接杆设有通孔。
  3. 根据权利要求2所述的自紧扳手钻夹头，其特征在于所述扳手还设有手握杆，所述连接杆与所述手握杆相连，所述手握杆为十字形。
  4. 根据权利要求3所述的自紧扳手钻夹头，其特征在于所述后体上设有后体卡簧槽，所述前体上设有前体卡簧槽，所述前体卡簧槽与所述后体卡簧槽相互对应形成一个完整的卡簧槽，所述完整的卡簧槽内设有卡簧。
  5. 根据权利要求3所述的自紧扳手钻夹头，其特征在于所述前体上设有前体环形槽，所述后体上设有后体环形槽，所述前体环形槽与所述后体环形槽相互对应形成一个完整的环形槽，所述完整的环形槽内设有滚珠。
  6. 根据权利要求4所述的自紧扳手钻夹头，其特征在于所述后套与所述丝母之间还设有丝母套。
  7. 根据权利要求4所述的自紧扳手钻夹头，其特征在于所述后体与所述后套成一体。
  8. 根据权利要求6所述的自紧扳手钻夹头，其特征在于所述后套与所述丝母套固定连接，所述丝母套与所述丝母固定连接。
  9. 根据权利要求1-8中任意一项权利要求所述的自紧扳手钻夹头，其特征在于所述前体的前端设有环形油池，所述环形油池内设有润滑脂，所述润滑脂与所述夹爪接触。
PCT/CN2012/086749 2012-12-17 2012-12-17 自紧扳手钻夹头 WO2014094201A1 (zh)

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CN107282959A (zh) * 2016-03-31 2017-10-24 苏州宝时得电动工具有限公司 夹头及使用该夹头的动力工具
CN108098022A (zh) * 2016-11-24 2018-06-01 丹阳市雅本化工技术有限公司 一种钻头夹套
CN109004436A (zh) * 2018-07-20 2018-12-14 苏州众泽医疗科技有限公司 一种快速转接头
CN109454252A (zh) * 2018-12-05 2019-03-12 山东威达机械股份有限公司 夹头的夹紧装置及夹头

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CN107282959A (zh) * 2016-03-31 2017-10-24 苏州宝时得电动工具有限公司 夹头及使用该夹头的动力工具
CN107282959B (zh) * 2016-03-31 2021-08-10 苏州宝时得电动工具有限公司 夹头及使用该夹头的动力工具
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CN109004436A (zh) * 2018-07-20 2018-12-14 苏州众泽医疗科技有限公司 一种快速转接头
CN109454252A (zh) * 2018-12-05 2019-03-12 山东威达机械股份有限公司 夹头的夹紧装置及夹头

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