WO2014022987A1 - Mandrin de perçage - Google Patents

Mandrin de perçage Download PDF

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Publication number
WO2014022987A1
WO2014022987A1 PCT/CN2012/079824 CN2012079824W WO2014022987A1 WO 2014022987 A1 WO2014022987 A1 WO 2014022987A1 CN 2012079824 W CN2012079824 W CN 2012079824W WO 2014022987 A1 WO2014022987 A1 WO 2014022987A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
jaw
internal thread
thread
sleeve
Prior art date
Application number
PCT/CN2012/079824
Other languages
English (en)
Chinese (zh)
Other versions
WO2014022987A8 (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.)
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
Priority to PCT/CN2012/079824 priority Critical patent/WO2014022987A1/fr
Publication of WO2014022987A1 publication Critical patent/WO2014022987A1/fr
Publication of WO2014022987A8 publication Critical patent/WO2014022987A8/fr

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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

Definitions

  • the invention relates to a clamp for a machining tool, in particular to a clamping force and a convenient opening and protection tool, a simple structure, a large volume and a small volume, and a low cost, and can widely replace the existing wrench and hand tightness.
  • Drilling and milling are often used in production and processing activities, such as machine tools and electric drills. Drill chucks for holding drills, milling cutters, etc. on the working axes of these equipments have experienced long-term application and improvement. However, there are still many shortcomings.
  • the wrench drill chuck is used to increase the clamping force of the drill chuck by special auxiliary tools.
  • the special auxiliary tool is also needed to release the drill chuck.
  • Head which can be used on some large, medium and small processing equipment.
  • the advantage of this type of wrench drill chuck is that it has a wide range of applications.
  • the disadvantage is that special auxiliary tools must be used. Once lost or damaged, the drill chuck cannot be used, and the drill is added by a special auxiliary tool such as a wrench.
  • the clamping force of the chuck is limited by the strength of the human body, which sometimes causes the clamping force to fail to meet the requirements of some equipments, and the phenomenon of slipping and slipping during work does not affect the quality and precision of the workpiece.
  • the current wrench drill chuck has many variations, and it is changed to a self-tightening chuck to increase its clamping force.
  • the patent application with the authorization number CN2455421Y provides a self-tightening of the wrench drill chuck.
  • the chuck chuck can be self-tight, the clamping force is difficult to control and is too large, and on the one hand, the cutter is easily damaged, and on the other hand, the disassembly is difficult.
  • the above problem has been improved in the patent application with the publication number CN1390668A, but the structure is complicated and the cost is high.
  • the invention is directed to the technical problem that the existing wrench drill chuck has insufficient clamping force, and the clamping force is too large after the self-tightening the drill chuck, so that it cannot be opened and the tool is broken and the structure is complicated, and the utility model can provide a work time. Large enough clamping force, no need to use special tools to open, easy to operate, easy to operate and protect the tool, simple structure of the new drill chuck.
  • the present invention is provided with a front body, a rear body, a clamping jaw, a nut and a rear sleeve.
  • the clamping jaw is provided with an external thread of the clamping jaw
  • the nut is provided with a nut internal thread
  • the external thread of the clamping jaw cooperates with the internal thread of the nut.
  • the nut is fixedly connected with the rear sleeve
  • the rear sleeve is fixedly connected with the rear body
  • the spiral angle of the external thread of the jaw and the internal thread of the nut is: 1.43° ⁇ 19.12°.
  • a preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is: 2.08 ° ⁇ ⁇ ⁇ 18.01 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is 3.28 ° ⁇ ⁇ ⁇ 16.84 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is 4.16 ° ⁇ ⁇ ⁇ 15.59 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is: 5.32 ° ⁇ ⁇ ⁇ 14.27 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is: 6.19 ° ⁇ ⁇ ⁇ 13.01 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is: 7.63 ° ⁇ ⁇ ⁇ 12.86 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is 8.05 ° ⁇ ⁇ ⁇ 11.41 °.
  • a further preferred technical solution of the present invention is that the helical lifting angle of the external thread of the jaw and the internal thread of the nut is: 9.76 ° ⁇ ⁇ ⁇ 10.54 °.
  • the nut and the nut sleeve are fixedly connected by the clamping jaw and the nut, the nut sleeve is fixedly connected with the rear sleeve, the rear sleeve is fixedly connected with the rear body, and the rotation of the rear body drives the rear sleeve, the nut sleeve and the nut to rotate, thereby
  • the driving jaw moves up and down along the jaw hole to realize self-tightening, and the clamping force is controlled by the machine, thereby overcoming the problem that the clamping force of the original wrench chuck is insufficient.
  • the value of the helix angle ⁇ of the external thread of the jaw and the internal thread of the nut is a key point for realizing the technical effect of the present invention on the premise that the rest of the structure is determined. If the value of ⁇ is too small, the jaw and the nut will be in an over-tight state, which is easy to be stuck and requires a special tool to open; if the value of ⁇ is too large, the jaw and nut will be too loose, and the connection will not be Reliable, causing the equipment to fall off the equipment automatically due to the inability to clamp the drill bit during operation, so that the equipment cannot work normally.
  • the invention selects the value of the helix angle of the external thread of the jaw and the internal thread of the nut reasonably, so that the jaw and the nut are in an ideal connection state required by the device, and there is no jamming and cannot be opened or connected. Reliable and not close to the tool.
  • the invention can control the clamping force of the clamping jaw by adjusting the screwing angle of the internal thread of the nut and the external thread of the clamping jaw, and does not require other auxiliary devices, and the clamping force is too large or too small compared to other solutions. In terms of the method, the structure is simple and the cost is low.
  • Figure 1 is a general assembly view of the present invention
  • Figure 2 is a schematic view showing the structure of the precursor of the present invention.
  • Figure 3 is a half cross-sectional view of the rear body of the present invention.
  • Figure 4 is a schematic view showing the structure of the jaw of the present invention.
  • Figure 5 is a cross-sectional view of the nut of the present invention.
  • Figure 6 is a cross-sectional view of the nut sleeve of the present invention.
  • Figure 7 is a plan view of the bearing of the present invention.
  • Figure 8 is a plan view of the bearing pad of the present invention.
  • Figure 9 is a schematic structural view of a front cover of the present invention.
  • Figure 10 is a schematic structural view of a back cover of the present invention.
  • Figure 11 is a plan view of the circlip of the present invention.
  • the invention mainly comprises a front body 1, a rear body 2, a jaw 3, a jaw hole 4, a nut 5, a nut sleeve 6, a front sleeve 9 and a rear sleeve 10.
  • the rear body 2 is partially built into the front body 1, and the clamping jaw 3 is located in the jaw hole 4 of the front body 1.
  • the clamping jaw 3 is provided with a thread which cooperates with the thread of the nut 5, and the nut 5 is fixed to the nut sleeve 6.
  • the nut sleeve 6 is fixedly connected with the rear sleeve 10, and the rear sleeve 10 is fixedly connected with the rear body 2.
  • the rotation of the rear body 2 drives the rear sleeve 10 to rotate, and then the nut sleeve 6 and the nut 5 are rotated, and the rotation of the nut 5 is passed through.
  • the mutually cooperating jaws 3 move downward in the jaw holes 4, thereby clamping the cutters and completing the machining process.
  • Fig. 2-A is a cross-sectional view of the precursor 1 of the present invention
  • Fig. 2-B is a plan view of the precursor 1 of the present invention.
  • the inner end of the rear end of the front body 1 is provided with a groove 11, and when the rear body 2 is inserted into the front body 1, the rear body 2 just coincides with the groove 11.
  • a front hemispherical groove 12 is provided along the central axis, which corresponds to the rear body hemispherical groove 13 on the rear body 2, forming a completed ball groove.
  • a steel ball 14 is disposed in the ball groove.
  • the front body 1 is provided with a front spring retaining groove 15
  • the rear body 2 is provided with a rear body spring groove 16 at a position corresponding to the front spring retaining groove 15 , and the two cooperate with each other to form a complete spring groove.
  • a snap spring 17 is arranged in the spring groove.
  • the circlip 17 is pinched into the rear body spring groove 16, and the current body 1 and the rear body 2 are engaged with each other, that is, when the front body spring groove 15 and the rear body spring groove 16 correspond to each other to form a complete circlip groove, the card
  • the spring 17 is stretched and partially enters the front spring retaining groove 15, so that it acts as a limit, so that the rear body 2 can only rotate laterally relative to the front body 1 and cannot move radially relative to the front body 1. To ensure the stability of the structure.
  • the front body 1 is machined obliquely symmetrically with three jaw holes 4 extending through the upper and lower sides, and the jaws 3 are located in the jaw holes 4.
  • FIG. 4-A is a front view of the jaw 3
  • FIG. 4-B is a plan view of the jaw 3
  • the jaw 3 is provided with a jaw external thread 18.
  • the entire drill chuck is also provided with a nut 5 which is tightly fitted over the front body 1.
  • the nut 5 is provided with a nut internal thread 19 which cooperates with the external thread 18 of the jaw on the jaw 3.
  • a bearing 7 and a bearing pad 8 are further disposed between the upper end of the nut 5 and the front body 1. As shown in Figs. 7 and 8, the bearing 7 is disposed at the upper end of the nut 5, and the upper end of the bearing pad 8 is in close contact with the front body 1, The lower end is directly attached to the bearing 7. Since the bearing 7 is provided with the bearing steel ball 20, when the nut 5 rotates, the friction between the nut and the front body 1 becomes rolling friction, which reduces the resistance between the two and increases the flexibility of the entire drill chuck. Sex.
  • the helix angle ⁇ between the external thread 18 of the jaw and the internal thread 19 of the nut is 10.54°.
  • the front end of the front body 1 is further provided with a cutter hole 22 larger than the diameter of the applicable tool. After the cutter is placed therein, the cutter is clamped or released by the up and down movement of the jaw 3.
  • a nut sleeve 6 is sleeved on the outer circumference of the nut 5. As shown in FIG. 6, the nut sleeve 6 and the nut 5 are connected by an interference fit, and other fixed link manners can also be adopted, and only the rotation of the nut sleeve 6 can be driven. The nut 5 can be rotated. Similarly, the front sleeve 9 and the rear sleeve 10 are fixedly coupled to the outer periphery of the nut sleeve 6, as shown in FIGS. 9 and 10, FIG. 10-A is a half cross-sectional view of the rear sleeve 10, and FIG. 10-B is a top view of the rear sleeve 10.
  • the rear end of the rear sleeve 10 and the front end of the front sleeve 9 cooperate with each other, and they are fixedly connected with the nut sleeve 6 by an interference fit or other connection manner to ensure the stability of the entire drill chuck structure.
  • the back cover 10 rotates, the nut sleeve 6 that is fixedly coupled thereto will also rotate with it.
  • a cylindrical ring is bent inwardly along the central axis at the rear end of the rear sleeve 10, and is sleeved on the rear body 2, and is fixedly coupled to the rear body 2 by an interference fit or other means.
  • the rear body 2 is provided with a main body connecting hole 21, which is connected with the working shaft of the main body. When the main working shaft rotates, the rear body 2 also rotates together, so that the rear sleeve 10 also rotates together, and the front sleeve 9 and the front sleeve 9
  • the precursor 1 is fixedly connected by an interference fit or other means.
  • the main body connecting hole 21 of the rear body 2 is connected with the working shaft of the main machine.
  • the device motor is started, and the rear body 2 is rotated at a high speed by the main working shaft, because the rear sleeve 10, the nut sleeve 6, the nut 5 and the clamping jaw 3
  • the interaction between the static inertia has a strong impact force in the initial stage of the rotation of the rear body 2, forcing the nut 5 and the jaw 3 to rotate with it.
  • This impact force further causes the three jaws 3 to clamp the tool, after which the tool
  • the reaction force with the workpiece also forces relative rotation between the jaw 3, the nut 5, the nut sleeve 6 and the back sleeve 10, which also increases the clamping force of the three jaws 3 on the cutter, thus providing
  • the self-tightening function makes the whole drill chuck have high precision and stability. As the motor rotates, the three 3 clamping tools gradually rotate together to complete the machining process.
  • the front body 1 and the rear body 2 are restrained by a snap spring, which can be modified in various ways.
  • the spring groove formed by the cooperation of the front body 1 and the rear body 2 is changed into a cylindrical pin hole, and a cylindrical pin is arranged in the cylindrical pin hole, which can also serve as a limit position.
  • the cylindrical pin can also be set to any Other shapes can only be used as a limit.
  • the spring groove or the cylindrical pin hole can be omitted, and the steel ball originally disposed at the lateral contact position of the front and rear body can be directly moved to the position where the radial connection is connected, so that the limit position is ensured, and two The friction between the two is rolling friction, which maintains the flexibility of the drill chuck operation, and a plurality of rolling bearings can be arranged between the front and rear bodies. All manner of limitation between the front and rear bodies that can be conceived by a person of ordinary skill is within the scope of the present invention.
  • the power of the present invention is transmitted to the rear sleeve 10 through the rear body 2, and then the rear sleeve 10 is transmitted to the jaws 3 through a series of devices to drive the jaws 3 to move up and down in the jaw holes 4, which can also be used.
  • the deformation, such as omitting the nut sleeve 6, directly connects the nut 5 and the rear sleeve 10 to each other. Regardless of the type of transfer, it is only necessary to ensure that the rotation of the back cover 10 can finally move the jaws 3 up and down within the jaw holes 4.
  • annular oil pool may be provided at the front end of the precursor, which may be continuous or may be disposed corresponding to the three jaws 3, and may be in a discontinuous state.
  • Grease is sealed in the annular oil pool, so that the grease can be cut into the jaws 3 during the up and down movement, so that the friction between the jaws 3 and the front body 1 is greatly reduced, and the jaws are extended. 3 flexible time, which in turn extends the life of the drill chuck.
  • the outside of the annular oil pool is tightly fitted to the front sleeve 9 and the grease does not penetrate outward.
  • the steel ball 14 and the bearing steel ball 20 used in the present invention are all made of a wear-resistant steel material, and other materials capable of performing the same function may be used instead.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 1.43°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 2.08°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 3.28°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 4.16°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 5.32°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 6.19°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 7.63°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 8.05°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 9.76°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 11.41°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 12.23°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 13.01°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 14.27°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 15.59°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 16.84°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 18.01°.
  • the helix angle ⁇ between the external thread of the jaw and the internal thread of the nut is 19.12°.
  • Embodiment 2 to Embodiment 18 are the same as those of Embodiment 1.
  • Table 1 is the average value of the helix angle when the pitch is 2 mm to 12 mm and the number of thread heads is 1, 2, and 3, respectively. It should be noted that the pitch referred to in this table, regardless of which of the 1, 2, and 3 threads, is the distance between two adjacent threads, and the spiral angle is a single head. The helix angle of the thread.

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

Abstract

L'invention porte sur un mandrin de perçage, lequel mandrin comporte un corps avant (1), un corps arrière (2), une mâchoire de serrage (3), un écrou (5), et une douille arrière (10), dans lequel mandrin la mâchoire de serrage comporte un filetage de mâchoire de serrage externe (18), et l'écrou comporte un filetage d'écrou interne (19), le filetage de mâchoire de serrage externe coopérant mutuellement avec le filetage d'écrou interne; l'écrou étant relié de façon fixe à la douille arrière, et la douille arrière étant reliée de façon fixe au corps arrière; et l'angle d'hélice α entre le filetage de mâchoire de serrage externe et le filetage d'écrou interne étant dans la plage de 1,43°≤ α ≤ 19,12°. Le mandrin de perçage a une grande force de serrage, et il est non seulement apte à être ouvert de façon pratique, mais il est également apte à protéger l'outil, et il a une structure simple et des coûts relativement faibles.
PCT/CN2012/079824 2012-08-08 2012-08-08 Mandrin de perçage WO2014022987A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/079824 WO2014022987A1 (fr) 2012-08-08 2012-08-08 Mandrin de perçage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/079824 WO2014022987A1 (fr) 2012-08-08 2012-08-08 Mandrin de perçage

Publications (2)

Publication Number Publication Date
WO2014022987A1 true WO2014022987A1 (fr) 2014-02-13
WO2014022987A8 WO2014022987A8 (fr) 2014-04-10

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PCT/CN2012/079824 WO2014022987A1 (fr) 2012-08-08 2012-08-08 Mandrin de perçage

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108543962A (zh) * 2018-06-12 2018-09-18 山东威达机械股份有限公司 一种钻夹头

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2336896Y (zh) * 1998-06-16 1999-09-08 山东威达机床工具集团总公司 手紧式钻夹头
CN2361415Y (zh) * 1999-01-13 2000-02-02 来雷 台式车床锁紧装置
CN2520973Y (zh) * 2002-01-22 2002-11-20 山东威达机械股份有限公司 一种钻夹头
CN2640667Y (zh) * 2003-07-15 2004-09-15 山东威达机械股份有限公司 锁紧式钻夹头
US20090315279A1 (en) * 2008-06-18 2009-12-24 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN102343447A (zh) * 2011-09-02 2012-02-08 威海达旺五金制品有限责任公司 一种新式自紧钻夹头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2336896Y (zh) * 1998-06-16 1999-09-08 山东威达机床工具集团总公司 手紧式钻夹头
CN2361415Y (zh) * 1999-01-13 2000-02-02 来雷 台式车床锁紧装置
CN2520973Y (zh) * 2002-01-22 2002-11-20 山东威达机械股份有限公司 一种钻夹头
CN2640667Y (zh) * 2003-07-15 2004-09-15 山东威达机械股份有限公司 锁紧式钻夹头
US20090315279A1 (en) * 2008-06-18 2009-12-24 Jacobs Chuck Manufacturing Company Self tightening chuck with an axial lock
CN102343447A (zh) * 2011-09-02 2012-02-08 威海达旺五金制品有限责任公司 一种新式自紧钻夹头

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108543962A (zh) * 2018-06-12 2018-09-18 山东威达机械股份有限公司 一种钻夹头
CN108543962B (zh) * 2018-06-12 2023-07-07 山东威达机械股份有限公司 一种钻夹头

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