WO2014146512A2 - 电动工具 - Google Patents

电动工具 Download PDF

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Publication number
WO2014146512A2
WO2014146512A2 PCT/CN2014/071102 CN2014071102W WO2014146512A2 WO 2014146512 A2 WO2014146512 A2 WO 2014146512A2 CN 2014071102 W CN2014071102 W CN 2014071102W WO 2014146512 A2 WO2014146512 A2 WO 2014146512A2
Authority
WO
WIPO (PCT)
Prior art keywords
housing
tool
chuck
gearbox
output member
Prior art date
Application number
PCT/CN2014/071102
Other languages
English (en)
French (fr)
Other versions
WO2014146512A3 (zh
Inventor
黄永林
何岳存
Original Assignee
宁波市海联电器有限公司
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 宁波市海联电器有限公司 filed Critical 宁波市海联电器有限公司
Priority to DE112014006227.8T priority Critical patent/DE112014006227T5/de
Priority to PCT/CN2014/071102 priority patent/WO2014146512A2/zh
Priority to US15/105,574 priority patent/US10315301B2/en
Publication of WO2014146512A2 publication Critical patent/WO2014146512A2/zh
Publication of WO2014146512A3 publication Critical patent/WO2014146512A3/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/029—Construction of casings, bodies or handles with storage compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the invention relates to a tool, in particular to a power tool.
  • a power tool that includes a motor, a gearbox, a pusher for retracting the tool, a tool magazine, a tool chuck, an input connection between the motor and the gearbox, an output of the gearbox connected to the push rod, a push rod
  • the push rod drives the tool chuck to rotate, or the output member of the gearbox is connected with the tool chuck, and the output member drives the tool chuck to rotate, but in either case, the first gear is generally disposed on the output member.
  • the push rod or the tool chuck is provided with a second gear, and the first gear meshes with the second gear to realize the connection, so that the output member and the tool chuck are not on the same axis, and at the same time, the push rod needs space, thereby causing the power tool
  • the circumferential volume is large, the structure is complicated, and it is not compact enough; in order to push the tool into the tool chuck, the push rod can move axially, and there are two positions, position one, the push rod retraction will be located at the tool chuck The tool is brought back to the tool stock. At this time, the tool magazine can be rotated. The user rotates the tool magazine to select the tool. After the selection, the push rod extends forward and the tool is extended.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a power tool which is simple in structure, compact, energy-saving and long in service life.
  • the present invention provides a power tool including a motor, a gearbox, a tool magazine, a tool chuck, an input connection between the motor and the gearbox, and a second housing and a second housing thereof.
  • the housing, the motor and the gearbox are disposed in the first housing, the tool magazine and the tool holder are disposed in the second housing, and the tool magazine, the tool holder and the second housing are all rotatable relative to each other, the first housing And the second housing is axially movable to separate the output member of the gearbox from one of the tool holes and the tool holder of the tool magazine in a reverse or reverse direction, and the output member and the tool holder are respectively referred to as
  • the output member is sleeved with the tool holder circumferential drive, and the second housing is provided with a structure for the user to drive the tool magazine; the output member, the tool hole and the tool holder are located at the same On one axis.
  • the working principle of the invention is that the first housing and the second housing can move relative to each other to determine two positions: position one, the second housing moves forward, and the output member sequentially exits the tool chuck and the tool hole to Bring the tool back to the tool stock, when the machine is in the position, the tool magazine is not restricted by the circumferential direction of the output member, and the tool magazine can be rotated; in position 2, the second housing is moved backward and reset, and the output member is sequentially extended.
  • the tool hole and the tool chuck are pushed to push the tool into the tool chuck.
  • the output member When pushed into position, the output member is sleeved with the tool chuck circumferential drive to enable the output member to transmit torque to drive the tool chuck to rotate.
  • the chuck then drives the tool to rotate.
  • the present invention has the following advantages: since there is no push rod, the output member functions as a push rod, and at the same time, the first gear and the second gear of the prior art are not required, and the output member of the gearbox and the tool magazine are One of the tool holes and the tool chuck are located on the same axis, so the invention has the advantages of simple structure, compactness, energy saving and long service life.
  • the gearbox is a planetary gearbox, such that the axis of the planetary gearbox is the axis of the output member, such that the planetary gearbox, the tool hole, and the tool chuck are on the same axis, the present invention
  • the structure is simple, compact, small in weight, stable and reliable in operation, and more advantageous in reducing the circumferential dimension of the present invention.
  • the motor, the output member, the tool hole, and the tool holder are located on the same axis, which is more advantageous for improving the compactness of the circumferential space layout of the present invention.
  • a positioning mechanism for determining that the output member is withdrawn into position and the output member is extended into position is provided between the first housing and the second housing, such that both positions 1 and 2 have a certain axial direction.
  • the first housing and the second housing are not axially displaced.
  • the positioning mechanism means that, in the axial direction, the second housing is provided with a first radial recess and a second radial recess, and the first housing is provided with a ball radially supported by the elastic member, and the sphere is located at the
  • the front part of a casing is simple, compact, small in weight, stable in positioning, stable in operation, and more advantageous in improving the performance of the present invention.
  • the first housing and the second housing are movable relative to each other in an axial direction, which means that the first housing serves as a column and the second housing serves as a hole, and the column and the hole are axially movable and fit. It is simple, compact, small in weight, stable and reliable in operation, and more advantageous in improving the performance of the present invention.
  • the first housing and the second housing are movable relative to each other in an axial direction, further comprising a guiding structure, the guiding structure comprising at least one axially disposed guiding rod disposed on the casing of the gearbox, disposed on a guide sleeve on the second housing, the guide rod and the guide sleeve are axially movablely engaged, so as to enhance the stability of the axial movement,
  • the axial movement of the first housing and the second housing is more stable and reliable, while reinforcing the circumferential connection between the first housing and the second housing, or the second housing is more circumferentially stable.
  • the second housing is provided with a structure for the user to drive the tool magazine.
  • the second housing is provided with an opening for the user to move the tool magazine, so that the structure is simple, the weight is light, and the performance of the present invention is more favorable. improve.
  • the relatively rotatable connection between the tool chuck and the second casing means that the second casing is provided with a bearing, and the tool chuck is connected with the bearing, so that the structure is stable and reliable, and the performance of the invention is improved.
  • the output member and the tool holder circumferential transmission sleeve means that the output member is a polygonal shaft, and the tool holder is provided with a polygonal hole that cooperates with the polygonal shaft, and the polygonal shaft is sleeved with the polygonal hole, so that the structure Simple, stable and reliable transmission, and light weight, it is more conducive to the compactness of the circumferential space layout of the present invention.
  • Fig. 1 is a structural schematic view showing the position of the electric power tool of the present invention.
  • Figure 2 is a cross-sectional view of Figure 1.
  • FIG. 3 is a schematic structural view of the position of the power tool of the present invention.
  • Figure 4 is a cross-sectional view of Figure 3.
  • the electric power tool of the present invention comprises a motor 1, a gearbox 2, a tool magazine 3, a tool chuck 4, and the motor 1 is connected to an input member of the gearbox 2, and further comprises a first casing (5) and a second casing ( 6), the motor (1) and the gearbox (2) are arranged in the first housing (5), the tool magazine (3) and the tool holder (4) are arranged in the second housing (6), the tool magazine ( 3), the tool chuck (4) and the second housing (6) are relatively rotatably connected, the first housing (5) and the second housing (6) are relatively axially movable to make the gearbox (2)
  • the output member (7) is separated from the tool hole (8) and the tool holder (4) of the tool magazine (3) in sequence or in the opposite direction, and the output member (7) and the tool holder (4) are separated.
  • the socket means that the output member (7) is sleeved with the tool holder (4) circumferentially, and the second housing (6) is provided with a structure for the user to drive the tool magazine (3); the output member (7) ), the tool hole (8), the tool chuck (4) are located on the same axis; the tool magazine 3, the tool chuck 4
  • the second housing 6 moves axially to determine two positions: position one, the second housing 6 moves forward, and the output member 7 sequentially exits the tool chuck 4, the tool hole 8 to bring the tool back to the tool magazine 3 Storage, when exiting in position, the tool magazine 3 and the second housing 6 are relatively rotatable; in position two, the second housing 6 is moved backward and reset, and the output member 7 is sequentially inserted into the tool hole 8 and the tool holder 4
  • the tool is pushed into the tool chuck 4, and when pushed into position, the output member 7 is coupled to the tool chuck 4 to enable the output member 7 to drive the tool chuck 4 to rotate.
  • the gearbox (2) is a planetary gearbox
  • the output member 7 is coupled to the planet carrier of the planetary gearbox
  • the output member 7 is specifically configured as an output shaft.
  • the motor (1), the output member (7), the tool hole (8), and the tool holder (4) are located on the same axis.
  • a positioning mechanism for determining that the output member 7 is withdrawn into position and the output member 7 is extended into position is provided between the first housing 5 and the second housing 6.
  • the positioning mechanism means that the second housing 6 is provided with a first radial recess 9 and a second radial recess 10 in the axial direction.
  • the first housing 5 is provided with a ball 12 radially supported by the elastic member 11 .
  • the ball 12 is located at the front of the first housing 5.
  • the axially movable connection of the first housing 5 and the second housing 6 means that the first housing 5 serves as a column and the second housing 6 serves as a hole, and the column and the hole are axially movablely engaged.
  • the first housing 5 and the second housing 6 are movable relative to the axial direction and further comprise a guiding structure, the guiding structure comprising at least one axially disposed guiding rod 13 disposed on the casing of the gearbox 2,
  • the guide sleeve 14 and the guide sleeve 14 are axially movablely engaged with the guide sleeve 14 on the second housing 6.
  • the structure in which the second housing 6 is provided for the user to drive the tool magazine 3 means that the second housing 6 is provided with an opening 15 for the user to move the tool magazine 3.
  • the relatively rotatable connection of the tool chuck 4 to the second housing 6 means that the second housing 6 is provided with a bearing 16, and the tool chuck 4 is coupled to the bearing 16.
  • the bearing 16 is a bushing or ball bearing 16 or a thrust bearing 16.
  • the output member (7) and the tool holder (4) circumferentially drive the sleeve means that the output member (7) is a polygonal axis, and the tool holder (4) is provided with a polygonal hole that cooperates with the polygonal shaft, the polygonal axis Sleeve with a polygonal hole.
  • the polygonal axis is an outer hexagonal axis
  • the polygonal hole is a hexagonal hole.
  • the guide rods 13 have two, which are all located under the casing of the transmission case 2; the first casing 5 and the second casing 6 are movable relative to each other in the axial direction. It is also possible to use only the guiding structure.
  • the column and the hole are not necessarily required to be axially movable, and the first housing 5 and the second housing 6 are movable relative to each other in the axial direction.
  • the structure of the present invention can be varied.
  • the power tool of the present invention further includes a guide rod fixing seat 17 for functioning when one end of the guide rod 13 that is inserted into the guide sleeve 14 is mounted on the mounting seat provided on the gear housing.
  • the guide rod fixing seat 17 is sleeved from the other end of the guide rod 13 to fix the other end of the guide rod 13.
  • the axial through hole on the guide rod fixing seat 17 is also sleeved with the front end of the first housing 5, the front end
  • the output member 7 is extended for the purpose of circumferentially locking the two symmetrical portions constituting the first casing 5 at the front end of the first casing 5 to complete the splicing connection of the symmetrical two parts.
  • a housing 5 is passed through the guide rod fixing seat 17 at the same time.
  • the guide rod fixing base 17 is further provided with a mounting hole for mounting the elastic member 11.
  • the structure of the guide rod fixing seat 17 is such that the present invention
  • the power tool has a simpler and more compact structure, and the performance is more reliable and stable;
  • the connection of the guide sleeve 14 to the second housing 6, this example gives a structure, that is, the second housing 6 is also the same as the first housing 5. It is made up of two parts that are symmetrical, but after the two parts are combined
  • the structure is not only simple, reliable, but also light in weight;
  • the openings 15 are two, respectively located on the left and right sides of the second housing 6;
  • the output member 7 The end is provided with a magnet 18 for holding the tool to enable the magnet 18 to be retracted to the tool magazine 3 when the output member 7 is withdrawn, and the tool can easily get rid of the magnet 18 when the tool magazine 3 is rotated.
  • a structure capable of realizing the above functions is also possible, for example, a pick and place structure, that is, the structure in which the output member 7 brings the tool back to the tool magazine 3 can be changed; the motor 1, the output member 7 of the gearbox 2, and the tool magazine 3
  • One of the tool holes 8 and the tool holder 4 are located on the same axis, so that the power tool of the present invention can be simpler, more compact, more reliable and stable, and is more advantageous for the gearbox 2 itself to surround the electric motor of the present invention.
  • the tool structure is simpler, more compact, and the performance is more reliable and stable.
  • the design and layout of the tool housing 3 can be set directly above the tool magazine 3 of the second housing 6 to facilitate the user to observe the knife. 3 to the position of rotation of the library.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Sawing (AREA)
  • Drilling And Boring (AREA)

Abstract

本发明提出一种结构简单、紧凑、节能、使用寿命长的电动工具, 它包括电机（1）、变速箱（2）、刀具库（3）、刀具夹头（4），电机（1）与变速箱（2）的输入件连接，电机（1）、变速箱（2）设于第一壳体（5）中，刀具库（3）、刀具夹头（4）设于第二壳体（6）中，第一壳体（5）和第二壳体（6）可相对轴向移动以使变速箱（2）的输出件（7）与刀具库（3）的其中一个刀具孔（8）、刀具夹头（4）依序套接或反方向分离，输出件（7）与刀具夹头（4）周向传动套接，第二壳体（6）设有供用户驱动刀具库（3）的结构；所述输出件（7）、刀具孔（8）、刀具夹头（4）位于同一轴线上。

Description

电动工具 技术领域
本发明涉及一种工具， 具体讲是一种电动工具。
背景技术
目前有一种电动工具， 它包括电机、 变速箱、 用于收放刀具的推杆、 刀具 库、 刀具夹头， 电机与变速箱的输入件连接， 变速箱的输出件与推杆连接， 推杆 一端进入刀具夹头后，推杆带动刀具夹头转动， 或者变速箱的输出件与刀具夹头 连接， 输出件带动刀具夹头转动， 但不管是哪种， 一般在输出件设置第一齿轮， 推杆或刀具夹头设置第二齿轮，第一齿轮与第二齿轮啮合来实现连接，这就使得 输出件与刀具夹头不位于同一轴线上， 同时， 布置推杆需要空间， 从而导致电动 工具周向体积较大， 结构复杂， 不够紧凑； 为了能够将刀具推入刀具夹头， 推杆 可轴向移动， 并存在两个位置， 位置一， 所述推杆缩回将位于刀具夹头的刀具带 回刀具库存放， 此时， 刀具库可转动， 用户转动刀具库选择刀具， 选定后， 所述 推杆向前伸出将刀具推入刀具夹头，此为位置二， 由于需要推杆的轴向移动结构 设计， 所以结构较为复杂， 同时， 刀具夹头转动时， 推杆也需要转动， 较为耗能， 推杆另一端一般连接一个推拉座， 推杆需要与推拉座可相对转动， 这样， 推杆另 一端与推拉座会因相对转动产生磨损损坏， 不利于提高电动工具的使用寿命。 发明内容
本发明所要解决的技术问题是， 克服了现有技术的缺陷， 提供了一种结构简 单、 紧凑、 节能、 使用寿命长的电动工具。
为解决上述技术问题， 本发明提出一种电动工具， 它包括电机、 变速箱、 刀 具库、 刀具夹头， 电机与变速箱的输入件连接， 它还包括它还包括第一壳体和第 二壳体， 电机、 变速箱设于第一壳体中， 刀具库、 刀具夹头设于第二壳体中， 刀 具库、刀具夹头与第二壳体均可相对转动连接，第一壳体和第二壳体可相对轴向 移动以使变速箱的输出件与刀具库的其中一个刀具孔、刀具夹头依序套接或反方 向分离， 所述输出件与刀具夹头套接是指所述输出件与刀具夹头周向传动套接， 第二壳体设有供用户驱动刀具库的结构； 所述输出件、刀具孔、 刀具夹头位于同 一轴线上。
本发明的工作原理是， 第一壳体和第二壳体可相对轴向移动确定两个位置： 位置一， 第二壳体向前移动， 所述输出件依次退出刀具夹头、 刀具孔以将刀具带 回刀具库存放， 当退出到位时， 刀具库不受所述输出件的周向限位， 刀具库可转 动； 位置二， 第二壳体向后移动复位， 所述输出件依次伸入刀具孔、 刀具夹头以 将刀具推入刀具夹头， 当推入到位时，所述输出件与刀具夹头周向传动套接以使 输出件能够传递扭力以带动刀具夹头转动， 刀具夹头再带动刀具转动。
采用上述结构后， 本发明具有以下优点： 由于没有推杆， 输出件起到推杆的 作用， 同时， 无需现有技术的第一齿轮、 第二齿轮， 而且， 变速箱的输出件、 刀 具库的其中一个刀具孔、刀具夹头位于同一轴线上，所以，本发明具有结构简单、 紧凑、 节能、 使用寿命长的优点。
作为改进， 所述变速箱为行星轮系变速箱， 这样， 行星轮系变速箱的轴线即 输出件所在轴线，从而使得行星轮系变速箱、刀具孔、刀具夹头位于同一轴线上， 本发明这种结构简单、 紧凑、 重量小， 工作稳定可靠， 更有利于本发明周向尺寸 减小。
作为改进， 所述电机、 输出件、 刀具孔、 刀具夹头位于同一轴线上， 这样， 更有利于提高本发明周向空间布局的紧凑性。
作为改进，第一壳体和第二壳体之间设有用于确定所述输出件退出到位、所 述输出件伸入到位的定位机构， 这样， 在位置一、 二， 都具有一定的轴向限位， 第一壳体和第二壳体不会轴向误动。
作为改进， 所述定位机构是指， 沿轴线方向， 第二壳体设有第一径向凹陷、 第二径向凹陷，第一壳体设有由弹性件径向支撑的球体，球体位于第一壳体前部， 这种结构简单、紧凑、重量小， 定位靠， 工作稳定， 更有利于本发明性能的提高。
作为改进，所述第一壳体和第二壳体可相对轴向移动连接是指第一壳体作为 柱、第二壳体作为孔， 所述柱、孔轴向活动套合， 这种结构简单、紧凑、重量小， 工作稳定可靠， 更有利于本发明性能的提高。
作为改进， 所述第一壳体和第二壳体可相对轴向移动连接还包括导向结构， 该导向结构包括设于变速箱的箱体上的至少一根轴向设置的导杆、设于第二壳体 上的导套， 所述导杆、 导套轴向活动套合， 这样， 能够加强轴向移动的稳定性， 使第一壳体和第二壳体轴向移动更加稳定可靠，同时加强第一壳体和第二壳体之 间的周向连接， 或者说， 第二壳体周向稳定性更好。
作为改进，所述第二壳体设有供用户驱动刀具库的结构是指第二壳体设有供 用户拨动刀具库的开口，这样，结构简单、重量轻，更有利于本发明性能的提高。
作为改进， 所述刀具夹头与第二壳体可相对转动连接是指第二壳体设有轴 承， 刀具夹头与轴承连接， 这样， 结构稳定可靠， 更有利于本发明性能的提高。
作为改进，所述输出件与刀具夹头周向传动套接是指输出件为多边形轴， 刀 具夹头设有与多边形轴配合的多边形孔， 所述多边形轴与多边形孔套接， 这样， 结构简单、 传动稳定可靠、 重量轻， 更有利于本发明周向空间布局的紧凑性。 附图说明
图 1为本发明电动工具的位置一时的结构示意图。
图 2为图 1的剖视示意图。
图 3为本发明电动工具的位置二时的结构示意图。
图 4为图 3的剖视示意图。
如图所示： 1、 电机， 2、 变速箱， 3、 刀具库， 4、 刀具夹头， 5、 第一壳体， 6、 第二壳体， 7、 输出件， 8、 刀具孔， 9、 第一径向凹陷， 10、 第二径向凹陷， 11、 弹性件， 12、 球体， 13、 导杆， 14、 导套， 15、 开口， 16、 轴承， 17、 导杆 固定座， 18、 磁体。
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：
本发明电动工具， 它包括电机 1、 变速箱 2、 刀具库 3、 刀具夹头 4， 电机 1 与变速箱 2的输入件连接， 它还包括第一壳体（5 )和第二壳体（6)， 电机（1 )、 变速箱 （2 ) 设于第一壳体 （5 ) 中， 刀具库 （3)、 刀具夹头 （4) 设于第二壳体 ( 6 ) 中， 刀具库 （3)、 刀具夹头 （4) 与第二壳体 （6 ) 均可相对转动连接， 第 一壳体 （5 )和第二壳体 （6 )可相对轴向移动以使变速箱 （2 ) 的输出件 （7 )与 刀具库 （3 ) 的其中一个刀具孔 （8)、 刀具夹头 （4)依序套接或反方向分离， 所 述输出件 （7 )与刀具夹头 （4)套接是指所述输出件 （7 )与刀具夹头 （4)周向 传动套接， 第二壳体（6 )设有供用户驱动刀具库（3 )的结构； 所述输出件（7)、 刀具孔 （8)、 刀具夹头 （4) 位于同一轴线上； 所述的刀具库 3、 刀具夹头 4随 第二壳体 6—起轴向移动确定两个位置： 位置一， 第二壳体 6向前移动， 所述输 出件 7依次退出刀具夹头 4、 刀具孔 8以将刀具带回刀具库 3存放， 当退出到位 时， 刀具库 3与第二壳体 6可相对转动； 位置二， 第二壳体 6向后移动复位， 所 述输出件 7依次伸入刀具孔 8、 刀具夹头 4以将刀具推入刀具夹头 4， 当推入到 位时， 所述输出件 7与刀具夹头 4连接以使输出件 7能够带动刀具夹头 4转动。
所述变速箱（2 )为行星轮系变速箱， 所述输出件 7与行星轮系变速箱的行星 架连接， 输出件 7的具体结构为输出轴。
所述电机 （1 )、 输出件 （7)、 刀具孔 （8)、 刀具夹头 （4) 位于同一轴线上。 第一壳体 5和第二壳体 6之间设有用于确定所述输出件 7退出到位、 所述输 出件 7伸入到位的定位机构。
所述定位机构是指， 沿轴线方向， 第二壳体 6设有第一径向凹陷 9、 第二径 向凹陷 10， 第一壳体 5设有由弹性件 11径向支撑的球体 12， 球体 12位于第一 壳体 5前部。
所述第一壳体 5和第二壳体 6可相对轴向移动连接是指第一壳体 5作为柱、 第二壳体 6作为孔， 所述柱、 孔轴向活动套合。
所述第一壳体 5和第二壳体 6可相对轴向移动连接还包括导向结构， 该导向 结构包括设于变速箱 2的箱体上的至少一根轴向设置的导杆 13、设于第二壳体 6 上的导套 14， 所述导杆 13、 导套 14轴向活动套合。
所述第二壳体 6设有供用户驱动刀具库 3的结构是指第二壳体 6设有供用户 拨动刀具库 3的开口 15。
所述刀具夹头 4与第二壳体 6可相对转动连接是指第二壳体 6设有轴承 16， 刀具夹头 4与轴承 16连接。
所述轴承 16为轴套或者球轴承 16或者推力轴承 16。
所述输出件（7 )与刀具夹头（4)周向传动套接是指输出件（7 )为多边形轴， 刀具夹头（4)设有与多边形轴配合的多边形孔， 所述多边形轴与多边形孔套接。
所述多边形轴为外六角轴， 多边形孔为内六角孔。
本例中， 所述导杆 13共有两根， 均位于变速箱 2的箱体的下方； 所述第一壳 体 5和第二壳体 6可相对轴向移动连接仅使用导向结构也是可以的，并不一定需 要所述柱、孔轴向活动套合，所述第一壳体 5和第二壳体 6可相对轴向移动连接 的结构可变化； 为了方便装配， 本发明电动工具还包括导杆固定座 17， 它的作 用在于， 当套入导套 14的导杆 13的一端安装在齿轮箱体上设置的安装座后， 导 杆固定座 17从导杆 13的另一端套入以固定导杆 13的另一端， 此时， 导杆固定 座 17上的轴向通孔还与第一壳体 5的前端套接， 前端伸出有所述输出件 7， 目 的在于使拼合构成第一壳体 5的对称两部分在第一壳体 5的前端处周向锁紧以完 成所述对称两部分的拼合连接， 该拼合连接构成第一壳体 5， 同时使所述输出件 7穿过导杆固定座 17，此外，导杆固定座 17还设有用于安装弹性件 11的安装孔， 导杆固定座 17的结构设置使得本发明电动工具结构更为简单、 紧凑， 性能更为 可靠稳定； 导套 14与第二壳体 6的连接， 本例给出一种结构， 即第二壳体 6也 是同第一壳体 5—样由对称的两部分拼合而成，只是两部分拼合后形成用于容纳 导套 14的限位腔， 这种结构不仅简单、 可靠， 而且重量较轻； 所述开口 15为两 个， 分别位于第二壳体 6的左右两侧； 所述输出件 7端部设有磁体 18， 磁体 18 用于吸住刀具以实现所述输出件 7退出时能够带动磁体 18退回刀具库 3， 而刀 具库 3转动时， 刀具又能轻松摆脱磁体 18， 当然， 其他能够实现上述功能的结 构也是可以，例如抓放结构， 也就是说所述输出件 7将刀具带回刀具库 3的结构 可变化； 所述电机 1、 变速箱 2的输出件 7、 刀具库 3的其中一个刀具孔 8、 刀 具夹头 4位于同一轴线上， 这样， 能够使本发明电动工具结构更为简单、 紧凑， 性能更为可靠稳定，也更有利于变速箱 2本身围绕使本发明电动工具结构更为简 单、 紧凑、 性能更为可靠稳定的方向进行设计和布局； 第二壳体 6 的刀具库 3 正上方可以设置一个观察窗， 以方便用户观察刀具库 3旋转所到位置。
图 4中，变速箱 2的输出件 7以及安装座局部剖视，导杆固定座 17局部剖视； 为将第一壳体 5和第二壳体 6明显区分以便于识图，第二壳体 6画有识别用的格 子线。

Claims

权利要求书
1、一种电动工具，它包括电机（1 )、变速箱（2)、刀具库（3)、刀具夹头（4)， 电机 （1 ) 与变速箱 （2 ) 的输入件连接， 其特征在于， 它还包括第一壳体 （5) 和第二壳体 （6)， 电机 （1 )、 变速箱 （2) 设于第一壳体 （5) 中， 刀具库 （3)、 刀具夹头 （4) 设于第二壳体 （6) 中， 刀具库 （3)、 刀具夹头 （4) 与第二壳体
(6) 均可相对转动连接， 第一壳体 （5) 和第二壳体 （6) 可相对轴向移动以使 变速箱（2) 的输出件（7)与刀具库（3) 的其中一个刀具孔（8)、 刀具夹头（4) 依序套接或反方向分离， 所述输出件（7)与刀具夹头（4)套接是指所述输出件
( 7)与刀具夹头（4)周向传动套接， 第二壳体（6)设有供用户驱动刀具库（3) 的结构； 所述输出件 （7)、 刀具孔 （8)、 刀具夹头 （4) 位于同一轴线上。
2、 根据权利要求 1所述的电动工具， 其特征在于， 所述变速箱 （2) 为行星 轮系变速箱。
3、根据权利要求 1所述的电动工具，其特征在于，所述电机（1 )、输出件（7)、 刀具孔 （8)、 刀具夹头 （4) 位于同一轴线上。
4、 根据权利要求 1所述的电动工具， 其特征在于， 第一壳体 （5) 和第二壳 体 （6) 之间设有用于确定所述输出件 （7) 退出到位、 所述输出件 （7) 伸入到 位的定位机构。
5、 根据权利要求 4所述的电动工具， 其特征在于， 所述定位机构是指， 沿轴 线方向， 第二壳体（6 )设有第一径向凹陷 （9)、 第二径向凹陷 （10)， 第一壳体
( 5) 设有由弹性件 （11 )径向支撑的球体（12)， 球体（12)位于第一壳体（5) 前部。
6、 根据权利要求 1所述的电动工具， 其特征在于， 所述第一壳体 （5) 和第 二壳体 （6) 可相对轴向移动连接是指第一壳体 （5) 作为柱、 第二壳体 （6) 作 为孔， 所述柱、 孔轴向活动套合。
7、 根据权利要求 6所述的电动工具， 其特征在于， 所述第一壳体 （5) 和第 二壳体 （6) 可相对轴向移动连接还包括导向结构， 该导向结构包括设于变速箱
( 2) 的箱体上的至少一根轴向设置的导杆 （13)、 设于第二壳体 （6 ) 上的导套 ( 14)， 所述导杆 （13)、 导套 （14) 轴向活动套合。
8、 根据权利要求 1所述的电动工具， 其特征在于， 所述第二壳体 （6) 设有 供用户驱动刀具库 （3 ) 的结构是指第二壳体 （6) 设有供用户拨动刀具库 （3) 的开口 （15)。
9、 根据权利要求 1所述的电动工具， 其特征在于， 所述刀具夹头 （4) 与第 二壳体 （6) 可相对转动连接是指第二壳体 （6) 设有轴承 （16)， 刀具夹头 （4) 与轴承 （16) 连接。
10、 根据权利要求 1所述的电动工具， 其特征在于， 所述输出件（7)与刀具 夹头 （4) 周向传动套接是指输出件 （7) 为多边形轴， 刀具夹头 （4) 设有与多 边形轴配合的多边形孔， 所述多边形轴与多边形孔套接。
PCT/CN2014/071102 2014-01-22 2014-01-22 电动工具 WO2014146512A2 (zh)

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