WO2013174217A1 - 可快速更换的两用钻夹头和使用它的电锤钻 - Google Patents

可快速更换的两用钻夹头和使用它的电锤钻 Download PDF

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Publication number
WO2013174217A1
WO2013174217A1 PCT/CN2013/075554 CN2013075554W WO2013174217A1 WO 2013174217 A1 WO2013174217 A1 WO 2013174217A1 CN 2013075554 W CN2013075554 W CN 2013075554W WO 2013174217 A1 WO2013174217 A1 WO 2013174217A1
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WO
WIPO (PCT)
Prior art keywords
drill
drill chuck
dual
chuck
sleeve
Prior art date
Application number
PCT/CN2013/075554
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English (en)
French (fr)
Inventor
王文江
Original Assignee
浙江海王电器有限公司
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Filing date
Publication date
Application filed by 浙江海王电器有限公司 filed Critical 浙江海王电器有限公司
Publication of WO2013174217A1 publication Critical patent/WO2013174217A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0049—Roll-shaped locking members

Definitions

  • the invention relates to the technical field of electric hammer drills, in particular to a dual-purpose drill chuck which can be quickly replaced and an electric hammer drill using the same.
  • the electric hammer drill which is usually used now, with reference to Fig. 1, Fig. 1A and Fig. 1B, the electric hammer function drill bit 21 Fixing concrete drilling operations on the hammer. If you need to drill steel or wood, refer to Figure 2, Figure 2A and Figure 2B. Additional connecting rods 102 and drill chucks are required. After being connected, it is assembled on the electric hammer, and then the twist drill bit 100 or other drill bit is clamped on the drill chuck 101 to realize the drilling operation, that is, the electric drill function is performed; when the user replaces the electric hammer function and the electric drill function, the drill is required to be installed and removed. Chuck 101.
  • the Chinese invention patent application proposes a tool holder that can be applied to both the electric hammer and the electric drill, and a drilling tool using the tool holder.
  • the tool shaft is sleeved on the rotary drive shaft and the tool holder is connected by a radial pin.
  • a tilted locking structure forms a self-locking with the slotted tool (the hammer for the hammer).
  • the technical solution of the patent application has many defects: the radial pin is surrounded by the unlocking sleeve, and the loading and unloading is inconvenient; and the radial pin is disposed through the socket portion to interfere with the hammer body, which may cause resistance to the movement of the hammer body. And wear the hammer; the locking structure is complex, which increases the difficulty of processing and use. Therefore, the program has not been put into practical use.
  • the invention provides a dual-purpose drill chuck and a hammer using the same, which has the advantages of convenient operation, high punching precision, high processing efficiency, and no need to disassemble the whole machine to replace the rotating sleeve after the key is worn, and the maintenance is convenient. Drill.
  • a quick-change dual-purpose drill chuck (hereinafter referred to as a dual-purpose drill chuck): the inside is hollow, and the front portion is a hand-tight or wrench-type drill chuck structure that is commonly used for holding an electric drill bit, and is disposed through the outer wall. There is a clamping member for holding the electric drill bit, and the outside has a locking device for locking the clamping member.
  • the drill chuck of the present invention has a rear portion extending, and the inner wall is provided with a key for transmitting the high torque of the electric hammer bit in cooperation with the open groove of the electric hammer drill bit, and has a cylinder which radially penetrates the wall of the drill chuck. pin.
  • a hammer bit can be mounted in the drill chuck.
  • the dual purpose drill chuck is mounted on the rotating sleeve by a fixed connection.
  • the connection portion of the rotary sleeve can be inserted into the drill chuck, that is, the connection portion of the drill chuck is the receiving portion; or the connection portion of the drill chuck can be inserted into the rotary sleeve. That is, the connecting portion of the drill chuck is an insertion portion.
  • the sleeve structure can adopt a key structure, a thread structure, a tapered structure or a flat structure, and the socket structure can transmit the torque of the rotating sleeve to the dual-purpose drill chuck.
  • the invention also provides an electric hammer drill using the above-mentioned quick-changeable dual-purpose drill chuck, comprising a fuselage, a driving motor, a gear transmission mechanism, a rotating sleeve and an impact mechanism.
  • the drive motor is connected to the input end of the gear transmission mechanism, and the output end of the gear transmission mechanism is connected to the rotary sleeve.
  • the rotating sleeve front end fixed connection device is connected to the quick-changeable dual-purpose drill chuck provided by the present invention.
  • the impact mechanism is located behind the electric hammer bit.
  • the rotating sleeve is connected to the dual-purpose drill chuck by the above-mentioned fixed connecting device and socket.
  • the fixed connecting device of the dual-purpose drill chuck and the rotating sleeve is a steel ball connection manner
  • the sleeve portion of the drill chuck and the rotating sleeve has two steel ball holes on the outer tube wall.
  • Corresponding inner wall of the inner tube has a circular groove for fixing the steel ball, and the steel ball is sequentially installed in the two steel ball holes and the circular groove.
  • the dual-purpose drill chuck mounts the portion of the electric hammer drill bit with a cylindrical pin extending radially through the wall of the drill chuck, the cylindrical pin for axially locking the electric hammer drill bit, that is, the inner end of the cylindrical pin enters the hammer bit of the electric hammer Close the groove so that it cannot slip off the drill bit clamp.
  • the dual-purpose drill chuck of the present invention also has a combined drill sleeve and a drill chuck sleeve: the drill sleeve is located at the rear of the dual-purpose drill chuck, and is placed on the dual-purpose drill chuck, and the drill sleeve is fixed.
  • the drill fixing ring is installed inside, the drill fixing ring is matched with the cylindrical pin; the drill chuck fixing sleeve is located on the drill chuck at the rear of the drill fixing sleeve, and the drill chuck fixing ring is installed in the drill chuck fixing sleeve, and the spring is reset.
  • One end is placed on the drill chuck fixing ring, and the other end of the return spring is placed on the drill fixing ring, and the drill fixing ring radially blocks the cylindrical pin of the axial positioning electric hammer drill bit, and the drill chuck fixing ring is radially blocked
  • the steel ball of the drill chuck and the rotating sleeve is axially positioned.
  • the drill chuck fixing sleeve moves backward along the axial direction of the drill chuck, and the drill chuck fixing ring allows the position of the steel ball to be blocked. At this time, the steel ball is disengaged from the rotating sleeve to fix the circular groove of the steel ball.
  • the drill chuck and the rotating sleeve of the fuselage can be easily removed and installed.
  • the dual-purpose drill chuck of the present invention is a hand-tight drill chuck and a wrench drill chuck with a grip size of 6-20 mm in diameter.
  • the socket structure of the connecting portion of the dual-purpose drill chuck and the rotating sleeve adopts a key matching manner, including a spline and a keyway, and the rotating sleeve is provided with a spline (or a keyway), and the drill chuck is provided with the flower A keyway (or spline) in which the key (or keyway) is mated, the spline being nested within the keyway.
  • the socket structure of the connecting portion of the dual-purpose drill chuck and the rotating sleeve adopts a thread-fit manner, including an internal thread and an external thread, and the rotating sleeve is provided with an external thread (or an internal thread), and the drill chuck is provided There is an internal thread (or external thread) that cooperates with the external thread (or internal thread), and the external thread is installed in the internal thread.
  • the socket structure of the connecting portion of the dual-purpose drill chuck and the rotating sleeve adopts a tapered surface matching manner, and includes an inner cone surface and an outer cone surface, and the rotating sleeve is provided with an outer cone surface (or an inner cone surface)
  • the drill chuck is provided with an inner tapered surface (or outer tapered surface) that cooperates with the outer tapered surface (or inner tapered surface), and the outer tapered surface is mounted in the inner tapered surface.
  • the socket structure of the connecting portion of the dual-purpose drill chuck and the rotating sleeve adopts a flat square matching manner, including an inner flat square and an outer flat square, and the rotating sleeve is provided with an outer flat square (or an inner flat square)
  • the drill chuck is provided with an inner flat side (or outer flat side) that cooperates with the outer flat side (or inner flat side), and the outer flat side is installed in the inner flat side; the flat
  • the square connection may be a flat surface to a flat surface.
  • the dual-purpose drill chuck externally installs an external dustproof system
  • the outer dustproof system includes a sealing member and a fixing head
  • the fixing head is assembled at a front portion of the drill chuck
  • the sealing member is set on an outer wall of the electric hammer drill bit .
  • the beneficial effects of the invention are mainly manifested in: the fuselage part of the electric hammer drill and the dual-purpose drill chuck are connected by various fixed manners, so that an electric hammer drill can be completed without directly removing the drill chuck, and the direct clamping can be included.
  • Various drill bits such as electric hammer drills, enable easy and fast drilling operations and improve work efficiency.
  • With fixed connection devices various types of drill chucks can be quickly mounted to electric hammer drills. Or it can be removed from the electric hammer drill, which is convenient and quick to operate.
  • FIG. 1 is a perspective view of a conventional electric hammer drill-clamp electric hammer drill bit
  • 1A is a structural view of a conventional electric hammer drill-clamp electric hammer drill bit
  • Figure 1B is a cross-sectional view of a conventional electric hammer drill chuck electric hammer drill bit
  • FIG. 2 is a perspective view of a conventional electric hammer drill clamping ordinary twist drill
  • 2A is a cross-sectional view of a conventional electric hammer drill chuck conventional twist drill
  • 2B is a structural view of a conventional electric hammer drill-clamping ordinary twist drill
  • Figure 3 is a perspective view of a preferred embodiment of the electric hammer drill of the present invention, wherein the machine head is divided into a wrench type drill chuck;
  • Figure 4 is a perspective view of the electric hammer drill of the present invention, showing the machine head divided into a hand-tight drill chuck;
  • Figure 5 is a plan view of the electric hammer drill of Figure 3;
  • Figure 6 is a plan view of the electric hammer drill of Figure 4.
  • Figure 7 and Figure 7-1 are structural views of the electric hammer drill of Figure 3, wherein the machine head is divided into a wrench type drill chuck;
  • Figure 7A and Figure 7-1A are cross-sectional views of the electric hammer drill of Figure 5 taken along the line A-A, showing the machine head divided into a wrench type drill chuck;
  • 7B and 7-1B are partial parts views of the structural view of the electric hammer drill of FIG. 3, showing the connection of the wrench type drill chuck and the rotating sleeve in the form of a key;
  • Figure 8 is a structural view of the electric hammer drill of Figure 4, showing the machine head divided into a hand-tight drill chuck;
  • Figure 8A is a cross-sectional view of the electric hammer drill of Figure 6 taken along the line A-A, showing the machine head divided into a hand-tight drill chuck;
  • Figure 8B is a partial part view of the structural view of the electric hammer drill of Figure 6, showing the connection of the hand-tight drill chuck and the rotating sleeve fixing device in the form of a key;
  • Figure 9 is a structural view of a hammer drill according to a second embodiment of the present invention, showing that the fuselage portion and the head portion (drill chuck) fixing device are screwed;
  • Figure 9A is a cross-sectional view of a hammer drill according to a second embodiment of the present invention.
  • 9B and 9B-1 are partial parts views of the structural view of the electric hammer drill of Fig. 9, showing the connection of the wrench type drill chuck and the rotating sleeve fixing device in a thread form;
  • Figure 10 is a structural view of a hammer drill according to a third embodiment of the present invention, showing a conical connection between the fuselage portion and the head portion (drill chuck) fixing device;
  • Figure 10A is a cross-sectional view of a hammer drill according to a third embodiment of the present invention.
  • FIG. 10B and FIG. 10B-1 are partial parts views of the structural drawing of the electric hammer drill of FIG. 10, wherein the wrench type drill chuck and the rotating sleeve fixing device are taperedly connected;
  • FIG 11 and Figure 11-1 are structural views of a hammer drill according to a fourth embodiment of the present invention, wherein the fuselage portion and the head portion (drill chuck) fixing device are shown as a flat connection;
  • 11A and 11-1A are cross-sectional views of a hammer drill according to a fourth embodiment of the present invention.
  • FIG. 11B and FIG. 11-1B are partial parts views of the structural drawing of the electric hammer drill of the electric tool of FIG. 11, wherein the wrench type drill chuck and the rotating sleeve fixing device are shown as a flat connection;
  • Figure 12A is a cross-sectional view of the electric hammer drill holding a conventional twist drill of the present invention, showing that the head portion (wrench type drill chuck) is clamped with a conventional twist drill;
  • Figure 12 is a perspective view of the electric hammer bit of the present invention holding a conventional twist drill, wherein the head portion (wrench type drill chuck) is clamped with a conventional twist drill;
  • Figure 13 is a schematic view showing the general assembly of the electric hammer drill bit, the drill chuck, and the fuselage portion of the present invention.
  • Drill chuck for dual purpose drill chucks 22 The interior is hollow.
  • the front part is a hand-tight or wrench type drill chuck structure of a conventional electric drill bit, and a clamping member for holding an electric drill bit is provided through the outer wall, and a locking device for locking the clamping member is externally provided.
  • the dual-purpose drill chuck of the present invention extends rearward, and the inner wall has a key for transmitting the high torque of the electric hammer bit in cooperation with the open groove of the hammer bit.
  • the rear end is a connecting portion that is sleeved with the rotating sleeve of the electric hammer drill, and the connecting portion has a fixed connecting device.
  • the figure B shows the connection part of the rotary sleeve inserted into the dual-purpose drill chuck, that is, the connection part of the dual-purpose drill chuck is the receiving part;
  • Figure B1 or Figure X-1B shows that the connecting portion of the dual-purpose drill chuck is inserted into the rotating sleeve, that is, the connecting portion of the dual-purpose drill chuck is the insertion portion.
  • the present invention also provides an electric hammer drill using the above-described dual-purpose drill chuck, comprising a fuselage 23, a drive motor 27 mounted therein, a gear transmission mechanism, and a rotary sleeve 39 And impact mechanism 42.
  • the drive motor 27 is connected to the input end of the gear transmission mechanism, and the output end of the gear transmission mechanism is connected to the rotary sleeve 39, and the electric hammer drill further includes the above-mentioned dual-purpose drill chuck 22, mounted on the rotating sleeve 39 by a fixed connecting device, the dual-purpose drill chuck is provided with a button for transmitting a large button moment of the electric hammer drill bit, the electric hammer drill bit can be installed in the drill chuck, and the impact mechanism 42 is located in the electric hammer Drill bit 21 At the rear, the dual-purpose drill chuck passes through the outer wall and is provided with a clamping member for holding the electric drill bit.
  • the clamping member can be equipped with other electric drill bits such as a twist drill.
  • the dual-purpose drill chuck has a clamping specification of a drill diameter of 6-20 mm.
  • Hand-tight drill chucks and wrench-type drill chucks The above are two common ways, of course, other ways can be implemented.
  • FIG 3 shows an electric hammer drill 20 in a preferred embodiment of the present invention.
  • the 20 includes a fuselage 23 and a dual-purpose drill chuck 22, a drive motor 27 is housed in the fuselage 23, and the switch 24 is mounted outside the fuselage 23, and the user operates the switch 24 Controls the opening and closing of the drive motor 27.
  • the electric hammer drill 20 includes an AC power cord 25 extending from the fuselage portion 23 to drive the motor through an external AC power source.
  • AC power cord 25 extending from the fuselage portion 23 to drive the motor through an external AC power source.
  • the rotating sleeve 39 is connected.
  • the movement of the drive motor 27 can be transmitted to the hammer bit 21 by an internal motion transmission mechanism to drive the hammer bit 21 to operate the object.
  • the fuselage portion The 23 and dual purpose drill chucks 22 are two members that are independent of each other.
  • Figure 7A shows the machine head divided into wrench drill chucks twenty two.
  • the clamping specifications include: the drill diameter is 6-20mm, and the specific clamping size is 6mm, 10mm, 13mm, 20mm.
  • Reference map 7B which shows that the wrench drill chuck and the rotating sleeve are connected in a splined form.
  • Figure 8A shows the machine head divided into hand-tight drill chucks 26.
  • the clamping specifications include: the drill diameter is 6-20mm, and the specific clamping size is 6mm, 10mm, 13mm, 20mm.
  • Reference map 8B which shows that the hand-tight drill chuck and the rotating sleeve are connected in a splined form.
  • a drive motor 27 drive gear 44, gear 43, gear 41, gear 40, rotating sleeve 39, dual-purpose drill chuck 22 output torque to achieve electric hammer drill bit 21 rotary motion.
  • the impact mechanism 42 is driven to reciprocate the piston 51 in the cylinder 52 to make the impact hammer 50 Constantly hit the electric hammer drill bit 21 .
  • the drill sleeve 36 is pressed, and the dual-purpose drill chuck 22 is sleeved in the form of a key to the rotating sleeve of the fuselage portion 23. 39 on.
  • the dual purpose drill chuck 22 is coupled to the rotating sleeve 39 to transmit torque for rotational movement.
  • the fixed connection is made by a steel ball connection, and the outer circumference of the rotating sleeve 39 is provided with a fixed steel ball.
  • the annular groove has two steel ball holes corresponding to the dual-purpose drill chuck 22, and the steel balls 28 are sequentially installed in the two steel ball holes and the annular groove. Steel ball 28 axially fixed dual-purpose drill chuck 22 and rotating sleeve 39. Prevent the dual-purpose drill chuck 22 from coming loose.
  • FIG. 7 and 7A show that the front end of the dual purpose drill chuck 22 has a dustproof system fixed to the dual purpose drill chuck 22, and the fixed head 30 in the dustproof system.
  • the sealing member 31 cooperates with the hammer bit 21 to prevent dust, and the fixing head 30 is fixed to the dual-purpose drill chuck 22. Prevents the intrusion of dust and foreign matter from the outside during work and damages the dual-purpose drill chuck 22, causing the dual-purpose drill chuck 22 can not hold other types of drill bits.
  • the distance D from the foremost end portion of the wrench drill chuck to the fuselage portion is 75 mm, and generally, the distance D ranges from 40 mm. Between 100mm.
  • the head portion is connected to the key of the rotating sleeve spline form.
  • Trail C It is 20mm, and generally, the outer diameter D ranges from 12mm to 50mm.
  • the distance D from the foremost end of the hand-tight drill chuck to the fuselage portion is 75 mm, and generally, the distance D ranges from 40 mm. Between 100mm.
  • the key outer diameter C of the connection between the hand-tight drill chuck and the rotary sleeve key is 20 mm, generally, the outer diameter C ranges from 12mm to 50mm.
  • the dual-purpose drill chuck 22 is mounted to the portion of the hammer drill bit 21, and has a radial through-drilling chuck 22
  • the cylindrical pin 32 of the wall, the electric hammer bit 21 is directly assembled into the dual-purpose drill chuck 22, and is axially fixed in the dual-purpose drill chuck 22 by the cylindrical pin 32, that is, the cylindrical pin 32
  • the inner end enters the closed slot of the hammer bit shank so that it cannot slip out of the dual-purpose bit holder 22.
  • the drill sleeve 36 is automatically reset by the return spring 38, and the drill sleeve is fixed.
  • the drill retaining ring 37 in 36 blocks the cylindrical pin 32 of the axial fixed hammer bit 21 to prevent the pin 32 from coming loose.
  • Drill chuck retainer 34 A steel ball that axially secures the dual purpose drill chuck 22 when moving down 28 It can be moved outwards, and the dual-purpose drill chuck 22 can be quickly removed.
  • Figure 9 and Figure 9A, Figure 9B shows yet another embodiment in which the dual purpose drill chuck 22 and fuselage section 23
  • the socket is threaded, and the hammer bit 21 is directly assembled into the dual-purpose drill chuck 22, and the cylindrical pin 32 is axially fixed in the dual-purpose drill chuck 22 to realize the function of the hammer.
  • the dual purpose drill chuck 22 can be easily assembled to the body.
  • the outer diameter E of the threaded connection of the dual purpose drill chuck 22 to the rotary sleeve is 20 mm, and generally, the outer diameter of the thread E The range is between 12mm and 50mm.
  • FIG. 10B shows still another embodiment in which the dual-purpose drill chuck 22 and the fuselage portion 23
  • the sleeve of the rotating sleeve 39 is sleeved, and the hammer bit 21 is directly assembled into the dual-purpose drill chuck 22, and is axially fixed to the dual-purpose drill chuck 22 by the cylindrical pin 32.
  • the drill chuck can be easily assembled to the body.
  • the outer diameter C of the tapered surface of the drill chuck and the rotating sleeve is 20 mm, generally, the outer diameter of the cone C ranges from 12mm to 50mm.
  • Figure 11 and Figure 11A shows yet another embodiment in which the dual purpose drill chuck 22 and fuselage section 23
  • the sleeve of the rotating sleeve 39 is connected with the steel ball and adopts a flat socket method, and the hammer bit 21 is directly assembled into the dual-purpose drill chuck 22, and is axially fixed to the dual-purpose drill chuck through the cylindrical pin 32. twenty two In the middle to achieve the function of the hammer.
  • the drill chuck can be easily assembled to the body.
  • the outer diameter C of the dual-purpose drill chuck 22 and the rotary sleeve flat connection form is 20mm, generally, the outer diameter C ranges from 12mm to 50mm.
  • FIG. 4 show that the electric hammer drill of the present invention can be used to remove the electric hammer drill bit 21 without disassembling the dual-purpose drill chuck 22. Drilling directly into the dual-purpose drill chuck 22 for the hammer function.
  • Figures 12 and 12A show the dual purpose drill chuck 22 directly gripping the conventional twist drill bit 100.
  • Fig. 1A and Fig. 1B show a conventional electric hammer holding electric hammer drill.
  • Figure 2A, Figure 2B It is shown that a conventional electric hammer needs to be additionally connected to the drill chuck 101 by a connecting rod 102, and then assembled on a hammer, and then the twist drill bit 100 or other drill bit is clamped on the drill chuck to perform the drilling operation.
  • FIG. 3A, FIG. 4B, FIG. 3A, FIG. 8A, FIG. 8A, FIG. 12 and FIG. 12A and FIG. 1B of a conventional electric hammer, 2, FIG. 2A, and FIG. 2B can embody that the present invention is not only convenient, quick, and improves work efficiency while clamping various drill bits, and improves accuracy.
  • the replacement drill chuck can be easily removed and installed.
  • the four types of the keys, the thread, the tapered surface and the flat surface of the dual-purpose drill chuck and the fuselage portion are described, and those skilled in the art can also think of using the elastic cylindrical pin or steel.
  • Other fixing devices such as balls are used to realize the quick and convenient connection and disassembly of the drill chuck and the fuselage in the embodiment, and the electric hammer drill bit is assembled in the drill chuck to finally realize the drilling function of the electric hammer or the electric drill.
  • the fixing device is not limited to the mechanical structure, and may be other devices that achieve a fixed holding function by magnetic force or the like.
  • the electric hammer drill disclosed in the present invention is not limited to the contents described in the above embodiments and the structures shown in the drawings. Obvious modifications, substitutions or alterations to the shapes and positions of the components in the present invention are intended to be within the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)

Abstract

一种两用钻夹头（22）和使用两用钻夹头（22）的电锤钻（20）。两用钻夹头（22）的内部呈中空；前部为手紧式或扳手式钻头夹；后部延伸，内壁有与电锤钻头（21）的开口槽配合的键，有径向贯穿钻夹头（22）壁的圆柱销（32）；后端为与电锤钻（20）的转动套（39）实现套接的连接部，连接部相对转动套（39）的相应部分可以为承接部或插入部，连接部有固定连接装置；固定连接装置为钢球（28），钻夹头（22）与转动套（39）两者套接部位的外层管壁上开有两钢球孔，在对应的内层管壁对应的位置上有固定钢球（22）的圆环形凹槽，钢球（22）贯穿两钢球孔且进入圆环形凹槽内。使用两用钻夹头的电锤钻，操作方便、舒适、可以快速安装和拆卸钻夹头、打孔精度较高、加工效率较高。

Description

可快速更换的两用钻夹头和使用它的电锤钻 技术领域
本发明涉及电锤钻技术领域，尤其涉及一种可快速更换的两用钻夹头和使用它的电锤钻。
背景技术
现在通常使用的的电锤钻，参照图 1、图 1A 和图 1B，把电锤功能的钻头 21 装夹在电锤上实现混凝土钻孔作业，如需钻钢材或木材时，参照图 2、图 2A 和图 2B，需要另外用 连接杆 102 与钻夹头 101 连接后再装配在电锤上，再把麻花钻头 100 或其他钻头夹持在钻夹头 101 上来实现钻孔作业，即执行电钻功能；当使用者更换电锤功能和电钻功能时需要装拆钻夹头 101，实际使用中会出现频繁装拆钻夹头的情况，导致操作非常不方便，而且由于在电钻功能时，采用了连接杆结构，连接杆与钻头以及电锤的机头部分的连接精度较差，容易 导致跳动大，并进而造成打孔精度低，另外使用者手感不舒服，加工效率较低。因电锤钻头21 和钻夹头连接杆 102 同转动套以键形式的连接来传递工作时大扭矩、钢球进行轴向走位来进行冲击钻孔工作，易导致转动套内的键磨损，从而无法连接电锤钻头 21 和钻夹头连接杆102，导致无法工作，修理时需进行非常繁琐的整机拆解更换转动套，此操作非专业用户会很难进行更换维修。为克服上述缺陷，公开号为 CN1149850A 的中国发明专利申请提出了一种可适用于电锤和电钻两种功能钻头的工具夹和使用该工具夹的钻孔工具。在旋转传动轴上套接并用径向销连接工具夹，一个倾斜设置的锁紧结构与带槽的工具（电锤用钻头）形成自锁。但该专利申请的技术方案存在诸多缺陷：径向销被去锁套筒包围，装卸不便；且该径向销设置贯穿过套接部位，与锤体相抵触，会对锤体的运动造成阻力并磨损锤体；锁紧结构复杂，增加了加工和使用的难度。因此该方案并没有得到实际的应用。
技术问题
为了克服己有的电锤在实现电钻功能时操作不方便、打孔精度较低、加工效率较低、更换磨损转动套比较繁琐、维修麻烦的不足，同时克服CN1149850A号中国发明专利申请技术的不足，本发明提供了一种操作方便、打孔精度较高、加工效率较高，且键磨损后无需拆解整机更换转动套、维修方便的一种两用钻夹头和使用它的电锤钻。
 技术解决方案
本发明解决其技术问题所采用的技术方案是：
一种可快速更换的两用钻夹头（以下简称两用钻夹头）：内部呈中空状，前部如普通的夹持电钻钻头的手紧式或扳手式钻夹头结构，穿过外壁设有夹持电钻钻头的夹持件，外部有锁紧夹持件的锁紧装置。与普通钻夹头不同的是，本发明的钻夹头后部延伸，内壁设有与电锤钻头的开口槽配合的传递电锤钻头大扭矩的键，有径向贯穿钻夹头壁的圆柱销。电锤钻头可安装在所述钻夹头内。所述两用钻夹头通过固定连接装置安装在所述转动套上。根据与转动套的套接方式的不同设计，可以是转动套插入钻夹头的连接部，即钻夹头的连接部为承接部；也可能反过来是钻夹头的连接部插入转动套，即钻夹头的连接部为插入部。其套接的结构可以采用键结构、螺纹结构、锥面结构或扁方结构，这些套接结构可将转动套的扭矩传递给两用钻夹头。本发明还提供一种使用上述可快速更换的两用钻夹头的电锤钻，包括机身，机身内安装驱动电机、齿轮传动机构、转动套和冲击机构。驱动电机与齿轮传动机构的输入端连接，齿轮传动机构的输出端与转动套连接。转动套前端固定连接装置连接本发明提供的可快速更换的两用钻夹头。所述冲击机构位于电锤钻头的后方。转动套通过上述的固定连接装置和套接方式连接所述的两用钻夹头。以下对两用钻夹头的进一步限定，同样适用于对使用两用钻夹头的电锤钻的限定。
进一步，所述两用钻夹头与转动套的固定连接装置为钢球连接方式，钻夹头与所述转动套两者的套接部位，在外层管壁上开有两钢球孔，在对应的内层管壁对应的位置上有固定钢球的圆环形凹槽，所述钢球依次安装在两钢球孔和圆环形凹槽内。所述两用钻夹头安装电锤钻头的部位，有径向贯穿钻夹头壁的圆柱销，该圆柱销用于轴向锁定电锤钻头，即圆柱销的内端进入电锤钻头柄的闭口槽，使其不能从钻头夹中滑脱。
再进一步，本发明的两用钻夹头还有组合的钻头固定套和钻夹头固定套：钻头固定套位于两用钻夹头的后部，套装在两用钻夹头上，钻头固定套内安装钻头固定圈，钻头固定圈与圆柱销配合；钻夹头固定套位于钻头固定套的后部同时套装在钻夹头上，钻夹头固定套内安装钻夹头固定圈，复位弹簧的一端顶在所述钻夹头固定圈上，复位弹簧的另一端顶在所述钻头固定圈上，钻头固定圈径向挡住轴向定位电锤钻头的圆柱销，钻夹头固定圈径向挡住轴向定位钻夹头与转动套的钢球。
钻夹头固定套沿钻夹头轴向方向向后移动，钻夹头固定圈就让开了挡住钢球的位置，此时的钢球就脱开转动套固定钢球的圆环形凹槽，钻夹头与机身的转动套就可以轻松的拆卸和安装。
优选的，本发明的两用钻夹头为夹持规格为钻头直径6-20mm之间的手紧式钻夹头和扳手式钻夹头。
所述两用钻夹头与转动套的连接部的套接结构采用键配合方式，包括花键和键槽，所述转动套设有花键(或键槽)，钻夹头设有与所述花键(或键槽)配合的键槽(或花键)，所述花键嵌套在所述键槽内。
或者是：所述两用钻夹头与转动套的连接部的套接结构采用螺纹配合方式，包括内螺纹和外螺纹，所述转动套设有外螺纹(或内螺纹)，钻夹头设有与所述外螺纹(或内螺纹)配合的内螺纹(或外螺纹)，所述外螺纹安装在所述内螺纹内。
再或者是：所述两用钻夹头与转动套的连接部的套接结构采用锥面配合方式，包括内锥面和外锥面，所述转动套设有外锥面(或内锥面)，所述钻夹头设有与所述外锥面(或内锥面)配合的内锥面(或外锥面)，所述外锥面安装在所述内锥面内。
又或者是：所述两用钻夹头与转动套的连接部的套接结构采用扁方配合方式，包括内扁方和外扁方，所述转动套设有外扁方(或内扁方)，所述钻夹头设有与所述外扁方(或内扁方)配合的内扁方(或外扁方)，所述外扁方安装在所述内扁方内；所述扁方连接方式可以是一面形扁平面到多面形扁平面。
所述两用钻夹头外部安装外防尘系统，所述外防尘系统包括密封元件与固定头，所述固定头装配在钻夹头前部，所述密封元件套装在电锤钻头的外壁。
有益效果
本发明的有益效果主要表现在：电锤钻的机身部分与两用钻夹头通过各种不同固定方式的连接，实现了一个电锤钻可以完成不用拆卸钻夹头就可以直接装夹包括电锤钻头在内的各种不同钻头实现各种操作方便、快捷的钻孔作业及提高了工作效率；且利用固定连接装置，各种不同类型的钻夹头可以快速的安装到电锤钻上或是从电锤钻卸下，操作方便、快捷。
附图说明
图1是现有电锤钻装夹电锤钻头的立体图；
图1A是现有电锤钻装夹电锤钻头的结构图；
图1B是现有电锤钻装夹电锤钻头的剖视图；
图2是现有电锤钻装夹普通麻花钻头的立体图；
图2A是现有电锤钻装夹普通麻花钻头的剖视图；
图2B是现有电锤钻装夹普通麻花钻头的结构图；
图3是本发明一种首选实施方式的电锤钻的立体图，其中示出了机头部分为扳手式钻夹头；
图4是本发明电锤钻的立体图，其中示出了机头部分为手紧式钻夹头；
图5是图3中电锤钻的俯视图；
图6是图4中电锤钻的俯视图；
图7和图7-1是图3中电锤钻的结构图，其中示出了机头部分为扳手式钻夹头；
图7A和图7-1A是图5中电锤钻沿A-A方向的剖视图，其中示出了机头部分为扳手式钻夹头；
图7B和图7-1B是图3中电锤钻的结构图的部分零件图，其中示出了扳手式钻夹头与转动套为键形式的连接；
图8是图4中电锤钻的结构图，其中示出了机头部分为手紧式钻夹头；
图8A是图6中电锤钻沿 A-A方向的剖视图，其中示出了机头部分为手紧式钻夹头；
图8B是图6中电锤钻的结构图的部分零件图，其中示出了手紧式钻夹头与转动套固定装置为键形式的连接；
图9是本发明第二实施方式的电锤钻的结构图，其中示出了机身部分与机头部分(钻夹头)固定装置为螺纹连接；
图9A是本发明第二实施方式的电锤钻的剖视图；
图9B和图9B-1是图9中电锤钻的结构图的部分零件图，其中示出了扳手式钻夹头与转动套固定装置为螺纹形式的连接；
图10是本发明第三实施方式的电锤钻的结构图，其中示出了机身部分与机头部分(钻夹头)固定装置为锥面连接；
图10A是本发明第三实施方式的电锤钻的剖视图；
图10B和图10B-1是图10中电锤钻的结构图的部分零件图，其中示出了扳手式钻夹头与转动套固定装置为锥面连接；
图11和图11-1是本发明第四实施方式的电锤钻的结构图，其中示出了机身部分与机头部分(钻夹头)固定装置为扁方连接；
图11A和图11-lA是本发明第四实施方式的电锤钻的剖视图；
图11B和图11-lB是图11中电动工具电锤钻的结构图的部分零件图，其中示出了扳手式钻夹头与转动套固定装置为扁方连接；
图12A是本发明的电锤钻夹持普通麻花钻头的剖视图，其中示出了机头部分(扳手式钻夹头)夹持的是普通麻花钻头；
图12是本发明的电锤钻头夹持普通麻花钻头的立体图，其中示出了机头部分(扳手式钻夹头)夹持的是普通麻花钻头；
图13是本发明的电锤钻钻头、钻夹头、机身部分大体装夹示意图。
本发明的最佳实施方式
下面结合附图和具体实施方式对本发明作进一步详细的说明。
参照图 3~图 13，一种两用钻夹头和使用它的电锤钻。两用钻夹头的钻夹头 22 的内部呈中空。前部如普通的夹持电钻钻头的手紧式或扳手式钻夹头结构，穿过外壁设有夹持电钻钻头的夹持件，外部有锁紧夹持件的锁紧装置。与普通钻夹头不同的是，本发明的两用钻夹头后部延伸，内壁有与电锤钻头的开口槽配合的传递电锤钻头大扭矩的键。后端为与电锤钻的转动套实现套接的连接部，连接部有固定连接装置。在以下的每一实施例中，图 B 示出的是转动套插入两用钻夹头的连接部，即两用钻夹头的连接部为承接部；图 B1 或图 X－1B示出的是两用钻夹头的连接部插入转动套，即两用钻夹头的连接部为插入部。在下文的描述中，为了避免重复，仅详细描述图 B 对应的方案，图 B1 或图 X－1B 对应的另一方案从略。本发明还提供一种使用上述两用钻夹头的电锤钻，包括机身 23，机身 23 内安装驱动电机 27、齿轮传动机构、转动套 39 和冲击机构 42。驱动电机 27 与齿轮传动机构的输入端连接，齿轮传动机构的输出端与转动套 39 连接，所述电锤钻还包括上述两用钻夹头 22，通过固定连接装置安装在转动套 39 上，两用钻夹头设有供传递电锤钻头大钮矩的键，电锤钻头可安装在所述钻夹头内，冲击机构 42 位于电锤钻钻头 21 的后方，两用钻夹头穿过外壁设有夹持电钻钻头的夹持件，夹持件上可以装配麻花钻等其他电钻钻头。
所述两用钻夹头为夹持规格为钻头直径 6-20mm 之间的手紧式钻夹头和扳手式钻夹头。以上为两种常用的方式，当然，也可以采用其他可以实现的方式。
图 3 示出了本发明中一种首选实施方式中的电锤钻 20。参照图 3 和图 5，图 7，图7A 电锤钻 20 包含一个机身 23 和一个两用钻夹头 22，一个驱动电机 27 安置在机身 23 内，开关 24 安装在机身 23 外部，用户通过操作开关 24 控制驱动电机 27 的开启和关闭。在本实施例中，电锤钻 20 包含一个从机身部分 23 伸出的交流电源线 25，通过外部的交流电源对驱动电机 27 进行供电，当然也可以考虑采用其他方式对驱动电机 27 进行供电，比如直流电源。电锤钻钻头 21 直接装入两用钻夹头 22 中，两用钻夹头 22 与机身 23 的转动套 39 连接。通过内部的运动传输机构可以将驱动电机 27 的运动传递给电锤钻头 21，从而驱使电锤钻头 21 对物体进行操作加工。本实施例中，机身部分 23 和两用钻夹头 22 是彼此独立的两个构件。
参照图 3 和图 5，图 7，图 7A 其中示出了机头部分为扳手式钻夹头 22。其夹持规格包括：钻头直径 6-20mm，具体夹持尺寸规格为钻头直径 6mm、10mm、13mm、20mm。参照图 7B，其中示出了扳手式钻夹头与转动套为花键形式连接。
参照图 4 和图 6，图 8，图 8A 其中示出了机头部分为手紧式钻夹头 26。其夹持规格包括：钻头直径 6-20mm，具体夹持尺寸规格为钻头直径 6mm、10mm、13mm、20mm。参照图 8B，其中示出了手紧式钻夹头与转动套为花键形式连接。
参照图 7，图 7A，一个驱动电机 27 驱动齿轮 44、齿轮 43、齿轮 41、齿轮 40，转动套 39，两用钻夹头 22 输出扭矩实现电锤钻头 21 旋转运动。同时带动冲击机构 42，使活塞51 在气缸 52 内作往复直线运动，使冲击锤 50 不断的打击电锤钻头 21。
参照图 7，图 7A 按下钻头固定套 36，两用钻夹头 22 通过键形式套接在机身部分 23的转动套 39 上。两用钻夹头 22 与转动套 39 连接来传递扭矩实现旋转运动。固定连接采用钢珠连接方式，转动套 39 的外圆上开有固定钢球 28 的圆环形凹槽，对应地两用钻夹头 22 上开有两钢球孔，钢球 28 依次安装在两钢球孔和圆环形凹槽内。钢球 28 在轴向固定两用钻夹头22 与转动套 39，防止两用钻夹头 22 松脱。
图7和图7A示出了两用钻夹头22的前端有一防尘系统与两用钻夹头22固定在一起，防尘系统中固定头 30 有密封元件 31 与电锤钻头 21 配合来防尘，固定头 30 与两用钻夹头 22固定在一起。防止工作过程中外部的灰尘和异物侵入而损坏两用钻夹头 22，造成两用钻夹头 22 不能夹持其它类钻头。
如图 7A 所示，本实施例中，为了便于各种规格的电锤钻头能够装配到扳手式钻夹头内部。同时，为了装配好的电锤钻头能够有足够的距离在钻夹头和转动套中运动。
优选地，扳手式钻夹头的最前端部到机身部分的距离 D 为 75mm，一般地，距离 D的范围在 40mm 到 100mm 之间。为了便于机头部分(扳手式钻夹头)能够方便地装配到机身上，本实施例中，优选地，机头部分(扳手式钻夹头)与转动套花键形式的连接的键外径 C 为 20mm，一般地，外径 D 的范围在 12mm 到 50mm 之间。
如图 8A 所示，本实施例中，为了便于各种规格的电锤钻头能够装配到手紧式钻夹头内部。同时，为了装配好的电锤钻头能够有足够的距离在钻夹头和转动套中运动。
优选地，手紧式钻夹头的最前端部到机身部分的距离 D 为 75mm，一般地，距离 D的范围在 40mm 到 100mm 之间。为了便于手紧式钻夹头能够方便地装配到机身上，本实施例中，优选地，手紧式钻夹头与转动套键形式的连接的键外径 C 为 20mm，一般地，外径 C 的范围在 12mm 到 50mm 之间。
按下钻头固定套 36，所述两用钻夹头 22 安装电锤钻头 21 的部位，有径向贯穿两用钻夹头 22 壁的圆柱销 32，电锤钻头 21 直接装配到两用钻夹头 22 中，通过圆柱销 32 轴向固定在两用钻夹头 22 中，即圆柱销 32 的内端进入电锤钻头柄的闭口槽，使其不能从两用钻头 夹 22 中滑脱。松开钻头固定套 36 时，通过复位弹簧 38 把钻头固定套 36 自动复位，钻头固定套 36 中的钻头固定圈 37 挡住轴向固定电锤钻头 21 的圆柱销 32，防止圆柱销 32 松脱。
当需要从整机 20 上拆卸电锤钻头 21 时，先按下钻头固定套 36，钻头固定套 36 与钻头固定圈 37 克服复位弹簧 38 的弹力向下移动。钻头固定套 36 向下移动时，使轴向固定电锤钻头 21 的圆柱销 32 可以向外移动，此时可以拔出电锤钻头 21。
当需要从整机 20 上拆卸两用钻夹头 22 时，先按下钻夹头固定套 34，钻夹头固定套34 与钻夹头固定圈 35 克服复位弹簧 38 的弹力向下移动。钻夹头固定套 34 向下移动时，使轴向固定两用钻夹头 22 的钢球 28 可以向外移动，此时可以快捷拆卸两用钻夹头 22。
图 9 和图 9A，图 9B 示出了又一实施例，其中两用钻夹头 22 与机身部分 23 的套接采用螺纹连接方式，同时电锤钻头 21 直接装配到两用钻夹头 22 中，通过圆柱销 32 轴向固定在两用钻夹头 22 中来实现电锤的功能。如图 9A 所示，为了便于两用钻夹头 22 能够方便地装配到机身上。优选地，两用钻夹头 22 与转动套螺纹连接方式的连接的螺纹外径 E 为 20mm，一般地，螺纹外径 E 的范围在 12mm 到 50mm 之间。
图 10 和图 10A，图 10B 示出了又一实施例，其中两用钻夹头 22 与机身部分 23 中的转动套 39 的套接方式采用锥面套接方式，同时电锤钻头 21 直接装配到两用钻夹头 22 中，通过圆柱销 32 轴向固定在两用钻夹头 22 中来实现电锤的功能。如图 10A 所示，为了便于钻夹头能够方便地装配到机身上。优选地，钻夹头与转动套锥面连接形式的锥面外径 C 为 20mm，一般地，锥面外径 C 的范围在 12mm 到 50mm 之间。
图 11 和图 11A，图 11B 示出了又一实施例，其中两用钻夹头 22 与机身部分 23 中的转动套 39 的套接方式是与钢珠连接同时采用扁方套接方式，同时电锤钻头 21 直接装配到两用钻夹头 22 中，通过圆柱销 32 轴向固定在两用钻夹头 22 中来实现电锤的功能。如图 11A 所示，为了便于钻夹头能够方便地装配到机身上。优选地，两用钻夹头 22 与转动套扁方连接形式的外径 C 为 20mm，一般地，外径 C 的范围在 12mm 到 50mm 之间。
图 3，图 4，图 7A，图 8A 示出了本发明电锤钻不用拆卸两用钻夹头 22，就能把电锤钻头 21 直接装配到两用钻夹头 22 中实现电锤功能的钻孔作业。图 12 和图 12A 示出了两用钻夹头 22 直接夹持普通麻花钻头 100。
图 1A，图 1B 示出了普通电锤夹持电锤钻头。图 2，图 2A，图 2B 示出了普通电锤需要另外用连接杆 102 与钻夹头 101 连接后在装配在电锤上，再把麻花钻头 100 或其他钻头夹持在钻夹头上来实现钻孔作业。
通过本发明图 3，图 4，图 7A，图 8A，图 12 和图 12A 与普通电锤的图 1A，图 1B， 图 2，图 2A，图 2B 可以体现本发明比普通电锤在夹持各种钻头时不仅方便、快捷而且提高工作效率的同时提高精度。并可轻松拆卸和安装更换钻夹头。
上述实施例中对两用钻夹头与机身部分的各种键、螺纹、锥面、扁平面四种套接方式进行了描述，本领域的普通技术人员也可以想到采用弹性圆柱销或钢球等其他的一些固定装置来实现本实施例中将钻夹头与机身快速、方便的连接与拆卸，并实现电锤钻头装配在钻夹头中而最终实现电锤或电钻的钻孔功能。固定装置也不限于机械结构，也可以是其他一些通过磁力等方式实现固定保持功能的装置。
本发明揭示的电锤钻并不局限于以上实施例所述的内容以及附图所表示的结构。在本发明的基础上对其中构件的形状及位置所做的显而易见地改变、替代或者修改，都在本发明要求保护的范围之内。
 本发明的实施方式
工业实用性
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Claims (10)

  1. 一种可快速更换的两用钻夹头，钻夹头内部呈中空；前部为手紧式或扳手式钻夹头，穿过外壁设有夹持电钻钻头的夹持件，外部有锁紧夹持件的锁紧装置；钻夹头主体后部延伸，内壁有与电锤钻头的开口槽配合的键，有径向贯穿钻夹头壁的圆柱销；其特征在于：后端为与电锤钻的转动套实现套接的连接部，连接部相对转动套的相应部分可以为承接部或插入部，连接部有固定连接装置；所述固定连接装置为钢球，钻夹头与转动套两者的套接部位，在外层管壁上开有两钢球孔，在对应的内层管壁对应的位置上有固定钢球的圆环形凹槽，所述钢球贯穿两钢球孔且进入圆环形凹槽内。
  2. 一种如权利要求 1 所说的可快速更换的两用钻夹头，其特征在于：其连接部的套接结构设置为下列结构之一，键结构、螺纹结构、锥面结构或扁方结构。
  3. 一种如权利要求 1 或 2 所说的可快速更换的两用钻夹头，其特征在于：设置有组合的钻头固定套和钻夹头固定套：钻头固定套位于钻夹头的后部，所述钻头固定套套装在钻夹头上，所述钻头固定套内安装钻头固定圈，所述钻头固定圈与圆柱销配合；钻夹头固定套位于钻头固定套的后部同时套装在钻夹头上，钻夹头固定套内安装钻夹头固定圈，复位弹簧的一端顶在所述钻夹头固定圈上，所述复位弹簧的另一端顶在所述钻头固定圈上，所述钻头固定套挡住轴向定位电锤钻头的圆柱销，钻夹头固定套挡住轴向定位钻夹头与转动套的钢球。
  4. 一种如权利要求 1 或 2 之一所述的可快速更换的两用钻夹头，其特征在于：所述前部手紧式钻夹头或扳手式钻夹头为夹持规格为钻头直径 6-20mm 之间的钻夹头。
  5. 一种如权利要求 3 所述的可快速更换的两用钻夹头，其特征在于：所述钻夹头外部安装外防尘系统，所述外部防尘系统包括密封元件与固定头，所述固定头装配在钻夹头前部，所述密封元件套装在电锤钻头的外壁。
  6. 一种电锤钻，包括机身，机身内安装驱动电机、齿轮传动机构、转动套和冲击机构，驱动电机与齿轮传动机构的输入端连接，齿轮传动机构的输出端与转动套连接，其特征在于：所述转动套上连接有如权利权要 1 至 5 之一的可快速更换的两用钻夹头。
  7. 一种如权利要求 6 所述的电锤钻，其特征在于：转动套与可快速更换的两用钻夹头的套接为键结构，转动套设有花键或键槽，与钻夹头的连接部设有的键槽或花键配合，所述花键嵌套在所述键槽内。
  8. 一种如权利要求 6 所述的电锤钻，其特征在于：转动套与可快速更换的两用钻夹头的套接为螺纹结构，转动套设有外螺纹或内螺纹，与钻夹头的连接部设有的内螺纹或外螺纹配合，所述外螺纹安装在所述内螺纹内。
  9. 一种如权利要求 6 所述的电锤钻，其特征在于：转动套与可快速更换的两用钻夹头的套接为锥面结构，转动套设有外锥面或内锥面，与钻夹头设有的内锥面或外锥面配合，所述外锥面安装在所述内锥面内。
  10. 一种如权利要求 6 所述的电锤钻，其特征在于：转动套与可快速更换的两用钻夹头的套接为扁方结构，所述转动套设有外扁方或内扁方，与钻夹头设有的内扁方或外扁方配合，所述外扁方安装在的内扁方内。
PCT/CN2013/075554 2012-05-25 2013-05-13 可快速更换的两用钻夹头和使用它的电锤钻 WO2013174217A1 (zh)

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