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WO2013078781A1 - 一种新型电锤 - Google Patents

一种新型电锤 Download PDF

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Publication number
WO2013078781A1
WO2013078781A1 PCT/CN2012/070301 CN2012070301W WO2013078781A1 WO 2013078781 A1 WO2013078781 A1 WO 2013078781A1 CN 2012070301 W CN2012070301 W CN 2012070301W WO 2013078781 A1 WO2013078781 A1 WO 2013078781A1
Authority
WO
WIPO (PCT)
Prior art keywords
drill chuck
electric hammer
rotating sleeve
drill
pin hole
Prior art date
Application number
PCT/CN2012/070301
Other languages
English (en)
French (fr)
Inventor
王文江
Original Assignee
浙江海王电器有限公司
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 浙江海王电器有限公司 filed Critical 浙江海王电器有限公司
Publication of WO2013078781A1 publication Critical patent/WO2013078781A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate

Definitions

  • the invention relates to a power tool.
  • the electric hammer function drill bit 12 is clamped on the electric hammer to realize the concrete drilling operation.
  • drilling steel or wood refer to Fig. 2, Fig. 2A and 2B
  • the drill chuck 101 needs to be installed and disassembled.
  • the drill chuck is frequently installed and disassembled, which results in very inconvenient operation, and the connecting rod structure is adopted in the function of the electric drill.
  • the connection accuracy between the connecting rod and the drill head and the head portion of the electric hammer is poor, which is likely to cause a large jump, and thus the punching accuracy is low, and the user feels uncomfortable and the processing efficiency is low.
  • the invention provides a novel operation with convenient operation, high drilling precision and high processing efficiency. Electric hammer.
  • a new type of electric hammer includes a fuselage, a driving motor, a gear transmission mechanism, a rotating sleeve and an impact mechanism are mounted in the fuselage, the driving motor is connected with an input end of the gear transmission mechanism, and an output end of the gear transmission mechanism Connected to the rotating sleeve, the new battery further includes a drill chuck, the drill chuck is hollow, and the drill chuck is mounted by a fixed connection device
  • the rotating chuck is provided with a through hole through which the power hammer bit passes, the electric hammer bit is installed in the rotating sleeve, and the impact mechanism is located behind the electric hammer bit,
  • the outer wall of the drill chuck is provided with a clamping member for holding the electric drill bit.
  • the drill chuck is a hand-tight drill chuck and a wrench-type drill chuck with a clamping size of 6-20 mm.
  • the fixed connection device includes a spline and a keyway, the outer wall of the rotating sleeve is provided with a spline, and an inner wall of the drill chuck is provided with a keyway that cooperates with the spline, and the spline is nested in the keyway .
  • the rotating sleeve is provided with a first pin hole
  • the drill chuck is provided with a second pin hole
  • the fixing pin is sequentially installed in the first pin hole and the second pin hole
  • the first cylindrical pin hole is further opened
  • the drill chuck is provided with a second cylindrical pin hole
  • the cylindrical pin is sequentially installed in the first cylindrical pin hole and the second cylindrical pin hole.
  • the fixed connecting device includes an internal thread and an external thread
  • the outer wall of the rotating sleeve is provided with an external thread
  • an inner wall of the drill chuck is provided with an internal thread that cooperates with the external thread
  • the external thread is installed at Inside the internal thread
  • the fixed connecting device comprises an inner tapered surface and an outer tapered surface, wherein the outer wall of the rotating sleeve is provided with an outer tapered surface, and an inner wall of the drill chuck is provided with an inner tapered surface that cooperates with the outer tapered surface,
  • the outer tapered surface is mounted within the inner tapered surface.
  • the fixed connecting device comprises a pin
  • the outer wall of the rotating sleeve is set on the inner wall of the drill chuck
  • the rotating sleeve has a first pin hole
  • the drill chuck has a second pin a hole
  • the pin is sequentially installed in the first pin hole and the second pin hole
  • the rotating sleeve is further provided with a first cylindrical pin hole
  • the drill chuck has a second cylindrical pin hole
  • the fixed connection device can also be implemented in other ways.
  • the fixing sleeve is located at the rear of the drill chuck and is disposed on the drill chuck and the rotating sleeve.
  • the fixing sleeve is provided with a fixing ring, and one end of the return spring is mounted on the fixing ring, the return spring The other end is mounted on the rotating sleeve; the fixing sleeve simultaneously blocks the pin for axially positioning the drill chuck and the rotating sleeve and the cylindrical pin for axially positioning the hammer bit.
  • the drill chuck is externally mounted with an external dustproof system
  • the outer dustproof system includes a sealing member and a fixed head
  • the fixed head is assembled at a front portion of the drill chuck
  • the sealing member is assembled on the electric hammer drill bit. Outer wall.
  • the drill chuck is internally provided with an internal dustproof system, and the inner dustproof system includes a sealing member and a fixing sleeve.
  • the sealing member is sleeved on an outer wall of the electric hammer drill bit, and the fixing sleeve is located at an inner wall of the drill chuck.
  • the beneficial effects of the invention are mainly manifested in: the connection between the fuselage part and the drill chuck through various fixed manners, realizes that a power tool can directly mount the hammer hammer drill bit without disassembling the drill chuck.
  • Different drill bits enable easy and fast drilling operations and improve work efficiency.
  • With fixed connection devices various types of drill chucks can be quickly mounted to or removed from power tools. Easy to operate and fast.
  • DRAWINGS Fig. 2B is a structural view showing a conventional electric hammer clamping ordinary twist drill.
  • Figure 3 is a perspective view of a power tool in accordance with a preferred embodiment of the present invention, showing the machine head divided into a wrench drill chuck.
  • Figure 4 is a perspective view of the power tool of the present invention showing the machine head divided into hand-tight drill chucks.
  • Figure 5 is a top plan view of the power tool of Figure 3.
  • Figure 6 is a plan view of the power tool of Figure 4.
  • Figure 7 is a structural view of the power tool of Figure 3, showing the machine head divided into a wrench type drill chuck.
  • Figure 7A is a cross-sectional view of the power tool of Figure 5 taken along the line A-A, showing the nose portion as a wrench drill chuck.
  • Figure 7B is a partial perspective view of the structural view of the power tool of Figure 3 showing the connection of the wrench drill chuck and the rotating sleeve in the form of a key.
  • Figure 8 is a structural view of the power tool of Figure 4, showing the machine head divided into hand-tight drill chucks.
  • Figure 8A is a cross-sectional view of the power tool of Figure 6 taken along the line A-A, showing the hand portion as a hand-tight drill chuck.
  • Figure 8B is a partial perspective view of the structural view of the power tool of Figure 6, showing the connection of the hand-tight drill chuck to the rotating sleeve retaining means in the form of a key.
  • Fig. 9 is a structural view showing a power tool according to a second embodiment of the present invention, in which the body portion and the head portion (drill chuck) fixing means are screwed.
  • Fig. 9A is a cross-sectional view showing a power tool according to a second embodiment of the present invention.
  • Figure 9B is a partial perspective view of the structural view of the power tool of Figure 9 showing the connection of the wrench-type drill chuck to the rotating sleeve retaining means in the form of a thread.
  • Figure 10 is a structural view of a power tool according to a third embodiment of the present invention, showing a conical connection between a fuselage portion and a nose portion (drill chuck) fixing device.
  • Fig. 10A is a cross-sectional view showing a power tool according to a third embodiment of the present invention.
  • Figure 10B is a partial perspective view of the structural view of the power tool of Figure 10, showing the tapered engagement of the wrench-type drill chuck and the rotating sleeve fixture.
  • Fig. 11 is a structural view showing a power tool according to a fourth embodiment of the present invention, in which the body portion and the head portion (drill chuck) fixing means are pinned.
  • Fig. 11A is a cross-sectional view showing a power tool according to a fourth embodiment of the present invention.
  • Figure 11B is a partial perspective view of the structural view of the power tool of Figure 11 showing the pin hand drill chuck and the rotating sleeve fixture being pinned.
  • Fig. 12 is a perspective view showing the electric power tool of the present invention for holding a conventional twist drill, in which the head portion (wrench type drill chuck) is held by a conventional twist drill.
  • Fig. 12A is a cross-sectional view showing the electric power tool of the present invention for holding a conventional twist drill, in which the head portion (wrench type drill chuck) is held by a conventional twist drill.
  • a new type of electric hammer includes a fuselage 23, and a driving motor, a gear transmission mechanism, a rotating sleeve 39 and an impact mechanism 42 are mounted in the body 23, and the driving motor and the gear transmission mechanism are provided.
  • the input end of the gear transmission is connected to the rotating sleeve 39.
  • the power tool further includes a drill chuck 22, the drill chuck 22 is hollow, and the drill chuck 22 is fixedly connected.
  • the drill chuck 22 is provided with a through hole through which the power hammer bit 21 passes, the electric hammer bit is installed in the rotating sleeve 39, and the impact mechanism 42 is located in the electric Behind the hammer bit 21, the outer wall of the drill chuck is provided with a clamping member for holding an electric drill bit, and the clamping member can be assembled Other drill bits such as twist drills.
  • the drill chuck is a hand-tight drill chuck and a wrench drill chuck with a clamping gauge of 6-20 mm.
  • the above are two common ways. Of course, other ways can be implemented.
  • FIG 3 illustrates a power tool 20 in a preferred embodiment of the present invention.
  • power tool 20 includes a fuselage 23 and a drill chuck 22, a motor 27 is disposed within the fuselage 23, and a switch 24 is mounted external to the fuselage 23 for operation by a user The switch 24 controls the opening and closing of the motor 27.
  • the power tool 20 includes an AC power cord 25 extending from the fuselage section 23 to supply power to the motor via an external AC power source.
  • AC power cord 25 extending from the fuselage section 23 to supply power to the motor via an external AC power source.
  • other methods of powering the motor such as a DC power source, may also be considered.
  • the electric hammer bit 21 passes through the inner through hole of the drill chuck 22 and is directly fitted into the rotary sleeve 39 of the body portion 23.
  • the movement of the motor 27 can be transmitted to the hammer bit 21 by an internal motion transmission mechanism, thereby driving the hammer bit 21 to operate the object.
  • the fuselage portion 23 and the drill chuck 22 may be two members that are independent of each other, or may be a single member that is integrated together.
  • the nose portion is shown divided into a wrench-type drill chuck 22.
  • the clamping specifications include: 6-20mm, the specific clamping size specifications are 6mm, 10mm, 13mm, 20mm.
  • FIG 5B there is shown a toggle connection between the wrench and the swivel sleeve.
  • the nose portion is shown divided into a hand-tight drill chuck 26.
  • the clamping specifications include: 6-20mm, the specific clamping size specifications are 6mm, 10mm, 13mm, 20mm.
  • FIG 6B there is shown a hand-tight drill chuck and a swivel sleeve in a keyed connection.
  • a motor 27 drives the first gear 40, the second gear 41, The third gear 43, the fourth gear 44, the rotating sleeve 39, and the drill chuck 22 output torque to realize the rotary motion of the hammer bit 21.
  • the impact mechanism 42 is driven to reciprocate the piston 51 in the cylinder 52, so that the hammer 50 continuously strikes the hammer bit 21.
  • the fixing sleeve 36 is pressed, and the drill chuck 22 is attached to the rotating sleeve 39 of the body portion 23 by means of a key.
  • the drill chuck 22 is coupled to the rotating sleeve 39 to transmit torque for rotational movement, while the pin 33 is used to axially secure the drill chuck 22 and the rotating sleeve 39 to prevent the drill chuck 22 from coming loose.
  • FIG. 7 and 7A show that the front end of the drill chuck 22 has a dustproof system fixed to the drill chuck 22.
  • the fixing head 30 has a double sealing member 31 and a hammer bit 21 for dustproofing.
  • the fixed head is fixed to the drill chuck 22. Preventing dust and foreign matter from intruding during work to damage the drill chuck 22, causing the drill chuck 22 to be unable to hold other drills.
  • Figure 7 and Figure 7A show that the drill chuck 22 has a dustproof system inside, internal protection
  • the dust system includes a sealing member 34 and a fixing sleeve 35 that cooperates with the hammer bit 21 to prevent dust. Preventing dust, foreign matter and oil from the outside of the machine 23 from infiltrating into the drill chuck 22 during operation, causing the drill chuck 22 not to hold other drill bits.
  • Fig. 7A in order to facilitate various specifications of the electric hammer drill bit, it can be assembled to the body through the through hole of the wrench drill chuck. At the same time, there is sufficient working drilling depth for the assembled hammer bit.
  • the distance D from the foremost end portion of the wrench bit to the fuselage portion is 67 mm, and generally, the distance D ranges from 40 mm to 100 mm.
  • the distance D ranges from 40 mm to 100 mm.
  • the outer diameter C of the key portion of the connection between the nose portion (handle drill chuck) and the rotating sleeve key is 15.5. Mm, generally, the outer diameter D ranges from 12 mm to 50 mm.
  • the electric hammer drill bit in order to facilitate various specifications of the electric hammer drill bit, it can be assembled to the body through the through hole of the hand-tight drill chuck. At the same time, there is sufficient working drilling depth for the assembled hammer drill.
  • the distance D1 from the foremost end portion of the hand-tight drill chuck to the fuselage portion is 68 mm, and generally, the distance D1 ranges from 40 mm to 100 mm.
  • the key outer diameter C of the connection between the hand-tight drill chuck and the rotating sleeve key is 15.5 mm, generally, outside The diameter C ranges from 12 mm to 50 mm.
  • the electric hammer bit 21 is directly fitted into the rotating sleeve 39 through the inner through hole of the drill chuck 22, and is axially fixed in the rotating sleeve 39 by the cylindrical pin 32, so that the hammer bit 21 is not loosened. Take off.
  • the fixing sleeve 36 is loosened, the fixing sleeve 36 is automatically reset by the return spring 38, and the fixing ring 37 in the fixing sleeve 36 simultaneously blocks the pin 33 of the axially fixed working head and the cylindrical pin 32 of the axial fixed electric hammer bit 21 to prevent The pin 33 is loose from the cylindrical pin 32.
  • the fixing sleeve 36 When it is necessary to remove the hammer bit 21 from the whole machine 20, the fixing sleeve 36 is first pressed, and the fixing sleeve 36 and the fixing ring 37 are moved downward against the elastic force of the return spring 38. When the fixing sleeve 36 is moved downward, the cylindrical pin 32 of the axially fixed hammer bit 21 can be moved outward, and the hammer bit 21 can be pulled out at this time.
  • the fixing sleeve 36 When it is necessary to remove the drill chuck 22 from the complete machine 20, the fixing sleeve 36 is first pressed, and the fixing sleeve 36 and the fixing ring 37 are moved downward against the elastic force of the return spring 38. When the fixing sleeve 36 is moved downward, the pin 33 of the drill chuck 22 is axially fixed, and the drill chuck 22 can be removed conveniently and quickly after the pin 33 is removed.
  • FIG. 9A and FIG. 9B show still another embodiment in which the drill chuck 22 and the fuselage portion 23 are fixed by screwing, and the hammer bit 21 is directly assembled through the inner through hole of the drill chuck 22.
  • the function of the hammer is achieved by turning into the rotating sleeve 39 on the fuselage portion 23.
  • Fig. 7A in order to facilitate the drilling chuck, it can be easily assembled to the body.
  • the thread outer diameter E of the threaded connection of the drill chuck to the rotary sleeve is 14 mm, and generally, the thread outer diameter E ranges from 12 mm to 50 mm.
  • FIG. 10A and FIG. 10B show still another embodiment in which the rotary chuck 29 and the rotary sleeve 39 in the fuselage portion 23 are fixed by a tapered connection while the hammer bit 21 passes through the drill chuck 22
  • the inner through hole is directly fitted into the rotary sleeve 39 on the fuselage portion 23, and the electric hammer is fixed by axially fixing the electric hammer drill to the rotary sleeve 39 through the steel ball 48.
  • Fig. 8A in order to facilitate the drilling chuck, it can be easily assembled to the body.
  • the tapered surface of the drill chuck and the rotating sleeve has a large diameter C of 15.5 mm, and generally, the outer diameter C of the tapered surface ranges from 12 mm to 50 mm.
  • Figure 11, Figure 11A and Figure 11B show yet another embodiment in which the drill chuck 22 and the rotating sleeve 39 in the fuselage portion 23 are fixed by means of a pin connection while the hammer bit 21 passes through the drill chuck 22.
  • the inner through hole is directly fitted into the rotary sleeve 39 on the fuselage portion 23, and the cylindrical hammer pin 32 is used to axially fix the electric hammer bit to the rotary sleeve 39 to realize the function of the hammer.
  • the outer diameter C of the drill chuck and the rotating sleeve pin connection form is 15.5 mm, and generally, the outer diameter C ranges from 12 mm to 50 mm.
  • FIG. 4 and FIG. 7A and FIG. 8A show that the electric tool of the present invention can directly assemble the electric hammer bit 21 through the inner through hole of the drill chuck 22 to the fuselage 23 without disassembling the drill chuck 22. Drilling operation with hammer function.
  • Figures 12 and 12A show the drill chuck 22 directly gripping the conventional twist drill bit 100.
  • FIG. 1A and 1B show a conventional electric hammer holding electric hammer drill.
  • FIG. 2A, FIG. 2B show that the ordinary electric hammer needs to be additionally connected with the drill chuck 101 by the connecting rod 102, and then assembled on the electric hammer, and then the twist drill bit 100 or other drill bit is clamped on the drill chuck to realize Drilling operations.
  • 3A, FIG. 7A, FIG. 7A, FIG. 12 and FIG. 12A with the conventional electric hammer, FIG. 1A, FIG. 1B, FIG. 2, FIG. 2A and FIG. 2B can embody the present invention in comparison with a conventional electric hammer.
  • a variety of drill bits are not only convenient, quick, but also improve work efficiency while improving accuracy.
  • the drill chuck is connected to the fuselage, and the electric hammer drill bit is directly assembled into the rotating sleeve of the fuselage portion through the inner through hole of the drill chuck to finally realize the drilling function of the electric hammer.
  • 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.

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

Abstract

一种新型电锤，包括机身（23），所述机身内安装驱动电机、齿轮传动机构、转动套（39）和冲击机构（42），所述驱动电机与齿轮传动机构的输入端连接，所述齿轮传动机构的输出端与转动套（39）连接，所述电动工具还包括钻夹头（22），所述钻夹头（22）呈中空状，所述钻夹头（22）通过固定连接装置安装在所述转动套（39）上，所述钻夹头（22）设有供电锤钻头穿过的贯通孔，所述电锤钻头安装在所述转动套（39）内，所述冲击机构（42）位于所述电锤钻头的后方；所述钻夹头外壁设有夹持电钻钻头的夹持件。该新型电锤操作方便、舒适、打孔精度较高、加工效率较高的新型电锤。

Description

说 明 书
一种新型电锤 技术领域
本发明涉及一种电动工具。
背景技术
现有的电锤， 参照图 1、 图 1A和图 1B， 把电锤功能的钻头 12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。
发明内容
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、 加工效率较高的新型电锤。
本发明解决其技术问题所采用的技术方案是：
一种新型电锤， 包括机身， 所述机身内安装驱动电机、 齿轮传动 机构、 转动套和冲击机构， 所述驱动电机与齿轮传动机构的输入端连 接， 所述齿轮传动机构的输出端与转动套连接， 所述新型电池还包括 钻夹头， 所述钻夹头呈中空状， 所述钻夹头通过固定连接装置安装在 所述转动套上， 所述钻夹头设有供电锤钻头穿过的贯通孔， 所述电锤 钻头安装在所述转动套内， 所述冲击机构位于所述电锤钻头的后方， 所述钻夹头外壁设有夹持电钻钻头的夹持件。
进一步， 所述钻夹头为夹持规格为 6-20mm之间的手紧式钻夹头 和板手式钻夹头。 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。
所述固定连接装置包括花键和键槽， 所述转动套外壁设有花键， 所述钻夹头的内壁设有与所述花键配合的键槽， 所述花键嵌套在所述 键槽内。
再进一步， 所述转动套上开有第一销孔， 所述钻夹头上开有第二 销孔， 固定销钉依次安装在所述第一销孔和第二销孔内； 所述转动套 上还开有第一圆柱销孔， 所述钻夹头上开有第二圆柱销孔， 圆柱销依 次安装在所述第一圆柱销孔和第二圆柱销孔内。
或者是： 所述固定连接装置包括内螺纹和外螺纹， 所述转动套外 壁设有外螺纹， 所述钻夹头的内壁设有与所述外螺纹配合的内螺纹， 所述外螺纹安装在所述内螺纹内。
再或者是： 所述固定连接装置包括内锥面和外锥面， 所述转动套 外壁设有外锥面，所述钻夹头的内壁设有与所述外锥面配合的内锥面， 所述外锥面安装在所述内锥面内。
又或者是： 所述固定连接装置包括销， 所述转动套外壁套装在所 述钻夹头的内壁， 所述转动套上开有第一销孔， 所述钻夹头上开有第 二销孔， 所述销依次安装在所述第一销孔和第二销孔内， 所述转动套 上还开有第一圆柱销孔， 所述钻夹头上开有第二圆柱销孔， 圆柱销依 次安装在所述第一圆柱销孔和第二圆柱销孔内。
当然， 固定连接装置也可以采用其他的方式来实现。
更进一步， 所述固定套位于钻夹头的后部同时套装在钻夹头与转 动套上， 所述固定套内安装固定圈， 复位弹簧的一端顶在所述固定圈 上， 所述复位弹簧的另一端安装在转动套上； 固定套同时挡住轴向定 位钻夹头与转动套的销与轴向定位电锤钻头的圆柱销。
优选的， 所述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。
所述钻夹头内部设有内防尘系统， 所述内防尘系统包括密封元件 和固定套， 密封元件套装在电锤钻头的外壁， 所述固定套位于钻夹头 的内壁。
本发明的有益效果主要表现在： 机身部分与钻夹头通过各种不同 固定方式的连接， 实现了一个电动工具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动工具上或是从电动工具卸下， 操作 方便、 快捷。
附图说明 图 2B是现有电锤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动工具的立体图， 其中示出 了机头部分为扳手式钻夹头。
图 4是本发明电动工具的立体图， 其中示出了机头部分为手紧式 钻夹头。
图 5是图 3中电动工具的俯视图。
图 6是图 4中电动工具的俯视图。
图 7是图 3中电动工具的结构图， 其中示出了机头部分为扳手式 钻夹头。
图 7A是图 5中电动工具沿 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是图 3中电动工具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中电动工具的结构图， 其中示出了机头部分为手紧式 钻夹头。
图 8A是图 6中电动工具沿 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中电动工具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动工具的结构图， 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动工具的剖视图。
图 9B是图 9中电动工具的结构图的部分零件图， 其中示出了板 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动工具的结构图，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动工具的剖视图。
图 10B是图 10中电动工具的结构图的部分零件图， 其中示出了 板手式钻夹头与转动套固定装置为锥面连接。
图 11是本发明第四实施方式的电动工具的结构图，其中示出了机 身部分与机头部分 （钻夹头） 固定装置为销连接。
图 11A是本发明第四实施方式的电动工具的剖视图。
图 11B是图 11 中电动工具的结构图的部分零件图， 其中示出了 板手式钻夹头与转动套固定装置为销连接。
图 12是本发明的电动工具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 12A是本发明的电动工具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。
具体实施方式
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 12A， 一种一种新型电锤， 包括机身 23， 所述机身 23内安装驱动电机、 齿轮传动机构、 转动套 39和冲击机构 42， 所述 驱动电机与齿轮传动机构的输入端连接， 所述齿轮传动机构的输出端 与转动套 39连接， 所述电动工具还包括钻夹头 22， 所述钻夹头 22呈 中空状， 所述钻夹头 22通过固定连接装置安装在所述转动套 39上， 所述钻夹头 22设有供电锤钻头 21穿过的贯通孔， 所述电锤钻头安装 在所述转动套 39内， 所述冲击机构 42位于所述电锤钻头 21的后方， 所述钻夹头外壁设有夹持电钻钻头的夹持件， 所述夹持件上可以装配 麻花钻等其他电钻钻头。
所述钻夹头为夹持规格为 6-20mm之间的手紧式钻夹头和板手式 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动工具 20。现参照 图 3和图 5， 图 7， 图 7A电动工具 20包含一个机身 23和一个钻夹头 22， 一个电机 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控制电机 27的开启和关闭。 在本实施例中， 电动 工具 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 流电源对电机进行供电， 当然也可以考虑采用其他方式对电机进行供 电， 比如直流电源。 电锤钻头 21穿过钻夹头 22的内部通孔直接装配 到机身部分 23的转动套 39中。 通过内部的运动传输机构可以将电机 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和钻夹头 22可以是彼此独立的两个 构件， 也可以是集成在一起的单一构件。
参照图 3， 图 5， 图 7和图 7A其中示出了机头部分为板手式钻夹 头 22。其夹持规格包括： 6-20mm, 具体夹持尺寸规格为 6mm、 10mm, 13mm, 20mm。参照图 5B, 其中示出了板手式钻夹头与转动套为键形 式连接。
参照图 4， 图 6， 图 8和图 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： 6-20mm,具体夹持尺寸规格为 6mm、 10mm, 13mm, 20mm。参照图 6B, 其中示出了手紧式钻夹头与转动套为键形 式连接。
参照图 7和图 7A， 一个电机 27驱动第一齿轮 40、 第二齿轮 41、 第三齿轮 43、 第四齿轮 44， 转动套 39， 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和图 7A按下固定套 36，钻夹头 22通过键形式连接在机 身部分 23的转动套 39上。 钻夹头 22与转动套 39连接来传递扭矩实 现旋转运动， 同时采用销 33在轴向固定钻夹头 22与转动套 39， 防止 钻夹头 22松脱。
图 7和图 7A示出了钻夹头 22的前端有一防尘系统与钻夹头 22 固定在一起， 防尘系统中固定头 30有双层密封元件 31与电锤钻头 21 配合来防尘， 固定头与钻夹头 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钻夹头 22， 造成钻夹头 22不能夹持其它类钻 图 7和图 7A示出了钻夹头 22的内部有一防尘系统， 内部的防尘 系统包含密封元件 34和固定套 35， 密封元件 34与电锤钻头 21配合 来防尘。防止工作过程中外部的灰尘、异物和机身 23内润滑油渗漏侵 入钻夹头 22内， 造成钻夹头 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 穿过板手式钻夹头内部贯穿孔装配到机身上。 同时， 为了装配好的电 锤钻头能够有足够的工作钻孔深度。
优选地，板手式钻夹头的最前端部到机身部分的距离 D为 67mm， 一般地， 距离 D的范围在 40mm到 100mm之间。 为了便于机头部分
(板手式钻夹头） 能够方便地装配到机身上， 本实施例中， 优选地， 机头部分 （板手式钻夹头） 与转动套键形式的连接的键外径 C 为 15.5mm, 一般地， 外径 D的范围在 12mm到 50mm之间。 如图 8A所示， 为了便于各种规格的电锤钻头能够穿过手紧式钻 夹头内部通孔装配到机身上。 同时， 为了装配好的电锤钻头能够有足 够的工作钻孔深度。 优选地， 手紧式钻夹头的最前端部到机身部分的 距离 D1为 68mm， 一般地， 距离 D1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 15.5mm, —般 地， 外径 C的范围在 12mm到 50mm之间。
按下固定套 36， 电锤钻头 21穿过钻夹头 22的内部贯穿孔直接装 配到转动套 39中，通过圆柱销 32轴向固定在转动套 39中，来实现电 锤钻头 21不会松脱。 松开固定套 36时， 通过复位弹簧 38把固定套 36自动复位， 固定套 36中的固定圈 37同时挡住轴向固定工作头的销 33与轴向固定电锤钻头 21的圆柱销 32，防止销 33与圆柱销 32松脱。
当需要从整机 20上拆卸电锤钻头 21时， 先按下固定套 36， 固定 套 36与固定圈 37克服复位弹簧 38的弹力向下移动。 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上拆卸钻夹头 22时， 先按下固定套 36， 固定套 36与固定圈 37克服复位弹簧 38的弹力向下移动。 固定套 36向下移 动时， 露出轴向固定钻夹头 22的销 33， 取出销 33后可以方便、 快捷 拆卸钻夹头 22。
图 9， 图 9A和图 9B示出了又一实施例， 其中钻夹头 22与机身 部分 23是通过螺纹连接固定方式， 同时电锤钻头 21 穿过钻夹头 22 的内部通孔直接装配到机身部分 23上的转动套 39中来实现电锤的功 能。 如图 7A所示， 为了便于钻夹头能够方便地装配到机身上。 优选 地， 钻夹头与转动套螺纹连接形式的连接的螺纹外径 E为 14mm, — 般地， 螺纹外径 E的范围在 12mm到 50mm之间。
图 10， 图 10A和图 10B示出了又一实施例， 其中钻夹头 22与机 身部分 23中的转动套 39是通过锥面连接固定方式， 同时电锤钻头 21 穿过钻夹头 22的内部贯穿孔直接装配到机身部分 23上的转动套 39 中， 在通过钢球 48来轴向把电锤钻头固定在转动套 39上实现电锤的 功能。 如图 8A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大径 C为 15.5mm, 一般地， 锥面外径 C的范围在 12mm到 50mm之间。
图 11， 图 11A和图 11B示出了又一实施例， 其中钻夹头 22与机 身部分 23 中的转动套 39是通过销连接固定方式， 同时电锤钻头 21 穿过钻夹头 22的内部贯穿孔直接装配到机身部分 23上的转动套 39 中， 再通过圆柱销 32来轴向把电锤钻头固定在转动套 39上来实现电 锤的功能。 如图 9A所示， 为了便于钻夹头能够方便地装配到机身上。 优选地，钻夹头与转动套销连接形式的外径 C为 15.5mm, —般地，外 径 C的范围在 12mm到 50mm之间。
图 3， 图 4， 图 7A和图 8A示出了本发明电动工具不用拆卸钻夹 头 22，就能把电锤钻头 21穿过钻夹头 22内部贯穿孔直接装配到机身 23上实现电锤功能的钻孔作业。图 12和图 12A示出了钻夹头 22直接 夹持普通麻花钻头 100。
图 1A和图 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 7A， 图 12和图 12A与普通电 锤的图 1A， 图 1B， 图 2， 图 2A和图 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。
上述实施例中对钻夹头与机身部分的各种键、 螺纹、 锥面、 销四 种固定连接装置进行了描述， 本领域的普通技术人员也可以想到采用 其他的一些固定装置来实现本实施例中将钻夹头与机身相连接， 并实 现电锤钻头穿过钻夹头的内部贯穿孔直接装配到机身部分的转动套中 而最终实现电锤的钻孔功能。 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。
本发明揭示的电动工具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。

Claims

权 利 要 求 书
1、一种新型电锤， 包括机身， 所述机身内安装驱动电机、 齿轮传动机 构、转动套和冲击机构，所述驱动电机与齿轮传动机构的输入端连接， 所述齿轮传动机构的输出端与转动套连接， 其特征在于： 所述电动工 具还包括钻夹头， 所述钻夹头呈中空状， 所述钻夹头通过固定连接装 置安装在所述转动套上， 所述钻夹头设有供电锤钻头穿过的贯通孔， 所述电锤钻头安装在所述转动套内， 所述冲击机构位于所述电锤钻头 的后方； 所述钻夹头外壁设有夹持电钻钻头的夹持件。
2、如权利要求 1所述的新型电锤， 其特征在于： 所述钻夹头为夹持规 格为 6-20mm之间的手紧式钻夹头和板手式钻夹头。
3、如权利要求 1或 2所述的新型电锤， 其特征在于： 所述固定连接装 置包括花键和键槽， 所述转动套外壁设有花键， 所述钻夹头的内壁设 有与所述花键配合的键槽， 所述花键嵌套在所述键槽内。
4、如权利要求 3所述的新型电锤， 其特征在于： 所述转动套上开有第 一销孔， 所述钻夹头上开有第二销孔， 固定销钉依次安装在所述第一 销孔和第二销孔内； 所述转动套上还开有第一圆柱销孔， 所述钻夹头 上开有第二圆柱销孔， 圆柱销依次安装在所述第一圆柱销孔和第二圆 柱销孔内。
5、如权利要求 1或 2所述的新型电锤， 其特征在于： 所述固定连接装 置包括内螺纹和外螺纹， 所述转动套外壁设有外螺纹， 所述钻夹头的 内壁设有与所述外螺纹配合的内螺纹， 所述外螺纹安装在所述内螺纹 内。
6、如权利要求 1或 2所述的新型电锤， 其特征在于： 所述固定连接装 置包括内锥面和外锥面， 所述转动套外壁设有外锥面， 所述钻夹头的 内壁设有与所述外锥面配合的内锥面， 所述外锥面安装在所述内锥面 内。
7、如权利要求 1或 2所述的新型电锤， 其特征在于： 所述固定连接装 置包括销， 所述转动套外壁套装在所述钻夹头的内壁， 所述转动套上 开有第一销孔， 所述钻夹头上开有第二销孔， 所述销依次安装在所述 第一销孔和第二销孔内； 所述转动套上还开有第一圆柱销孔， 所述钻 夹头上开有第二圆柱销孔， 圆柱销依次安装在所述第一圆柱销孔和第 二圆柱销孔内。
8、如权利要求 1或 2所述的新型电锤， 其特征在于： 所述固定套位于 钻夹头的后部同时套装在钻夹头与转动套上， 所述固定套内安装固定 圈， 复位弹簧的一端顶在所述固定圈上， 所述复位弹簧的另一端安装 在转动套上， 固定套同时挡住轴向定位钻夹头与转动套的销与轴向定 位电锤钻头的圆柱销或钢球。
9、如权利要求 1或 2所述的新型电锤， 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。
10、 如权利要求 1或 2所述的新型电锤， 其特征在于： 所述钻夹头内 部设有内防尘系统， 所述内防尘系统包括密封元件和固定套， 密封元 件套装在电锤钻头的外壁， 所述固定套位于钻夹头的内壁。
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CN112223218A (zh) * 2020-10-23 2021-01-15 杭州兔研工业设计有限公司 一种电镐用冲击头及电镐
CN113134810A (zh) * 2021-05-14 2021-07-20 无锡锐克电动工具有限公司 一种电榔头
CN114055639A (zh) * 2021-11-19 2022-02-18 中国建筑第五工程局有限公司 一种可拆卸式合金钻头凿毛电锤一体机

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