WO2014146506A1 - 电动工具 - Google Patents

电动工具 Download PDF

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Publication number
WO2014146506A1
WO2014146506A1 PCT/CN2014/070693 CN2014070693W WO2014146506A1 WO 2014146506 A1 WO2014146506 A1 WO 2014146506A1 CN 2014070693 W CN2014070693 W CN 2014070693W WO 2014146506 A1 WO2014146506 A1 WO 2014146506A1
Authority
WO
WIPO (PCT)
Prior art keywords
push rod
tool
roller
protrusion
shaft
Prior art date
Application number
PCT/CN2014/070693
Other languages
English (en)
French (fr)
Inventor
黄永林
王卫
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
Priority claimed from CN201310586734.8A external-priority patent/CN103600335B/zh
Priority claimed from CN201310731372.7A external-priority patent/CN103722538B/zh
Priority claimed from CN201310743073.5A external-priority patent/CN103707274B/zh
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
Publication of WO2014146506A1 publication Critical patent/WO2014146506A1/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
    • 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
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • the present invention relates to a hand-held electric tool having a drum type tool magazine and capable of rotating a tool magazine to change a tool.
  • Chinese Patent Application Publication No. CN101563192 discloses an electric tool with a drum type tool magazine.
  • the power tool has a pistol-shaped casing, and has a main axis extending in the direction of the barrel.
  • the power tool output shaft is at the exit of the barrel direction, and is a cutter chuck.
  • the casing is provided with a motor and a drum type tool magazine.
  • the transmission device and the drum type tool magazine have a cylindrical structure, and the axis of the drum type tool magazine and the axis of the tool chuck are parallel to the main axis, and the drum type tool magazine has a tool chamber which is parallel to the main axis in a ring shape on itself, and these tool chambers Respecting the overlapping position with the tool chuck according to the rotational position of the drum magazine, respectively, in which the corresponding tool can be transferred between the tool chamber and the tool chuck, the transfer is in the chuck with the tool Coaxial, realized by an actuator in the form of an operating slide guided on the outside of the housing.
  • the drum type tool magazine is also formed on the housing, and the drum type tool magazine is penetrated by the transmission shaft of the transmission device in the central region surrounded by the tool chamber, and the rotation shaft passes through the tool magazine and is drivenly connected to the cutter chuck through the gear , can drive the cutter head to rotate.
  • 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 that is simple and convenient to replace the tool in the tool magazine.
  • the present invention provides a power tool including a casing, a motor, a transmission, a tool chuck, and a drum type tool magazine, wherein the tool chamber in the drum type tool magazine can be adjusted to one at a time.
  • the tool in the tool chamber is transferred to the position of the tool chuck, and the transmission shaft of the transmission is disposed outside the drum magazine, and the drum magazine is rotatably connected to the casing.
  • the transmission device is drivingly coupled to the motor, the transmission device includes a gearbox, a first gear set, a drive shaft, and a second gear set.
  • the output shaft of the motor is coupled to the transmission, and the output shaft of the transmission is connected through the first gear set.
  • the drive shaft is disposed outside the drum cutter magazine, and the other end of the drive shaft is coupled to the cutter chuck through the second gear set for driving the cutter chuck to rotate.
  • the motor drives the output shaft of the transmission to rotate, and drives the cutter head through the transmission shaft and the first gear set and the second gear set to complete the action of the power tool.
  • the drum type tool magazine comprises a roller coaxial with the drum type tool magazine and a roller bracket for mounting the roller, wherein the casing is provided with a support seat, and the roller bracket is rotatably connected in the support base, and the plane of the rotation track is Vertical to the axis of the roller.
  • the support base is further provided with an arc groove for guiding and guiding the roller bracket
  • the roller bracket is provided with a first portion with a first ball matched with the arc groove.
  • the roller bracket is guided and restricted when the roller bracket rotates, and when the first ball slides to the position of the positioning groove at both ends of the arc groove, the depth and the width of the positioning groove are larger than the arc groove, and Due to the elasticity of the first spring, the first ball is caught in the positioning groove, so that the rotation angle and the stroke of the roller bracket are restricted, and the position of the arc groove is guided by the arc groove. Therefore, the roller bracket is rotated slightly, and the roller bracket rotates within the range of the arc groove. Limiting both ends of the arc groove is to prevent the excessive force from damaging the roller bracket when the roller bracket is screwed out, and to play the role of positioning when the roller bracket is reset.
  • the second embodiment is as follows: the roller bracket is provided with a sleeve, and the sleeve includes inner and outer tubes that are sleeved relative to each other, and the outer tube serves as a rotating shaft for rotating the roller bracket, and the inner tube is sleeved on the electric On the drive shaft of the tool, the drive shaft can be rotated in the inner tube, and the inner tube is connected as a support base to the casing of the electric tool to fix the inner tube and support the transmission shaft.
  • the casing and the transmission shaft are organically linked, and it is not necessary to avoid the transmission shaft to set the bracket, thereby avoiding the problem that the power tool structure becomes large due to the contradiction between the transmission shaft and the bracket, and realizes a problem.
  • the compact structure design is also convenient to use, so it has the advantages of compact structure and convenient use.
  • the outer surface of the inner tube is provided with a first radial protrusion
  • the first radial convex front surface is provided with two spherical depressions, and the two spherical depressions are distributed along the circumferential direction of the outer tube
  • the recess provides two anchor points, ie the bracket
  • the initial positional positioning and the positioning of the bracket out of position are more conducive to the improvement of performance, and the user is more convenient to use.
  • the first radial projection is a fan-shaped projection, which is more advantageous for compactness.
  • the roller of the drum type tool magazine is provided with a tool chamber, the center of the roller is provided with an axial shaft hole, and the roller bracket is provided with a shaft connected to the roller through the shaft hole, and the shaft is vertically disposed a second spring in the axial direction, a second ball is connected to both ends of the second spring, and a circumference of the shaft hole is provided with a card slot corresponding to the number of the tool chambers, the second ball and the card Slot fit.
  • the bottom surface of the card slot is a curved surface for accommodating the second ball.
  • the rotation of the card slot and the second ball can be used to drive a fixed angle for each rotation, so that the tools in the tool magazine of each rotation position are corresponding to the tool chuck, Deviations can occur, making the tool access to the tool magazine very smooth.
  • the present invention has the following advantages:
  • the present invention sets the transmission shaft of the transmission device to the outside of the drum type tool magazine, instead of passing through the drum type tool magazine, and can also rotate the drum type tool magazine to the casing. Therefore, the drum type tool magazine can be unscrewed without disassembling the boot casing, so that the tool in the tool magazine can be replaced, and then directly screwed into the casing for replacement, which is simple and convenient, so that the electric tool can carry the tool.
  • the variety of types, such as various screwdriver bits, drill bits, etc. greatly expands the range of use of the power tool.
  • the power tool further includes a push rod for pushing the tool to the position of the tool chuck; and a push rod block that is rotatably coupled to the transmission and whose plane of rotation is perpendicular to the axis of the push rod
  • the pusher bar is further provided with an elastic reset mechanism. In the natural state, the pusher bar is directly opposite the pusher and abuts against the rear end face of the pusher. When the elastic reset mechanism is in the state of accumulating force, the push bar is blocked. The piece rotates to be offset to the side, deviating from the position of the push rod movement;
  • the push rod is further provided with a push rod connecting piece and a push rod button, wherein the push rod is provided with a first protrusion, the push rod connecting piece is provided with a long hole, and the first protrusion of the push rod slides Fitted in the long hole, the push rod button is connected with the push rod connecting piece, and is used for pushing the push rod connecting piece and the push rod to move axially;
  • the top end of the pusher bar is provided with a cylindrical second protrusion
  • the pusher connecting piece is provided with a third protrusion which can move against the second protrusion when moving to rotate the pusher block.
  • the push button When the tool is changed, the push button is pushed backward to drive the pusher link to move backward, so that the third protrusion on the pusher link pushes the second protrusion on the pusher block, thereby rotating the pusher block Let out It is convenient to push the push rod backwards freely, and the elastic reset mechanism is in the state of accumulating force.
  • the push rod connecting piece is provided with a long hole, and the first protrusion on the push rod can slide in the long hole, so that at the beginning, the first protrusion is at the rear end of the long hole, and when the push rod connecting piece moves backward, Since the first protrusion slides in the long hole, the push rod does not move.
  • the push rod connecting piece has moved backward to rotate the push rod block to the side, until the push rod block is completely retracted, that is, there is no
  • the first protrusion slides to the front end of the long hole and abuts against the front end of the long hole, so that the push rod connecting piece can just move the push rod backward. This prevents the pusher from moving out when moving backwards.
  • the elastic return mechanism is a tension spring, and one end of the tension spring is connected to the driving unit, and the other end is connected to the push rod blocking piece.
  • the tension spring is used as the elastic reset mechanism, and the structure is simple and the cost is low.
  • Figure 1 is a schematic cross-sectional view of the present invention
  • FIG. 2 is a schematic structural view of a rotary state of a drum type tool magazine according to the present invention
  • Figure 3 is a schematic structural view showing the state in which the drum type tool magazine is screwed in the present invention
  • FIG. 4 is a schematic view showing a mounting structure of a roller bracket according to an embodiment of the present invention.
  • Figure 5 is a schematic view showing the installation structure when the roller bracket is screwed out
  • Figure 6 is an enlarged schematic view of a portion A of Figure 5;
  • Figure 7 is a cross-sectional view taken along line C-C of Figure 6;
  • Figure 8 is a schematic view showing the installation structure of the roller and the roller bracket
  • Figure 9 is a cross-sectional view showing the installation of the roller and the roller bracket
  • Figure 10 is a schematic axial cross-sectional view of the electric power tool of the second embodiment
  • Figure 11 is a cross-sectional view taken along line A-A of Figure 10;
  • Figure 12 is a cross-sectional view showing the C-C of Figure 10 in an initial position
  • Figure 13 is a cross-sectional view of the C-C bracket of Figure 10 when it is rotated out of position;
  • Figure 14 is a schematic structural view of a push rod assembly when the power tool of the present invention is in operation
  • Figure 15 is a schematic view showing the structure of the push rod assembly of the present invention when pushed backward;
  • Figure 16 is a schematic view showing the structure of the push rod assembly of the present invention after being pushed backward;
  • One of the embodiments of the electric power tool of the present invention is a pistol type electric screwdriver, and the present invention is exemplified below by taking the electric screw batch as an example:
  • a power tool which includes a casing 1, a motor 2, a transmission 3, a cutter chuck 4, and a drum cutter magazine 5, and the casing 1 is a pistol-shaped casing, and the muzzle
  • the cutter head 4 is provided with the cutter chuck 4 to catch the cutter and rotate the cutter.
  • the cutter in the embodiment is a screwdriver head, and the cutter chuck 4 is provided with a drum cutter magazine 5 at the rear of the cutter chuck 4, and the drum cutter magazine is provided. 5, the tool chamber 5.
  • the drive shaft 3 is disposed in the outer side of the drum type tool magazine 5, and the drive shaft 3. 3 is provided below the drum type tool magazine 5, and may also be provided on the side of the drum type tool magazine 5. In short, not in contact with the drum magazine 5, the tool magazine 5 and the drum 1 is rotatably connected to the housing.
  • the transmission device 3 is connected to the motor 2, and the transmission device 3 includes a gearbox 3.1, a first gear set 3. 2, a drive shaft 3.3, a second gear set 3.4, an output shaft of the motor 2 and a shifting
  • the drive shaft 3.3 is disposed outside the drum type tool magazine 5, the drive shaft is connected to the drive shaft 3. 3 3.
  • the other end of the 3 is connected to the tool chuck 4 through the second gear set 3.4, and is used to drive the cutter head 4 to rotate.
  • the motor drives the output shaft of the transmission to rotate, and drives the cutter head through the transmission shaft and the first gear set and the second gear set to complete the action of the power tool.
  • connection with the drive shaft 3.3 is directly connected through the first gear set 3.2, the output shaft of the motor 2 is directly connected through the first gear set 3.2.
  • Drive shaft 3. 3 The other end of the drive shaft 3. 3 is set on the drum.
  • the drive shaft 3. 3 is set on the drum.
  • the outside of the tool magazine 5 is within the scope of the present invention.
  • the roller-type tool magazine 5 includes a roller 5.1 that is coaxial with the drum-type tool magazine, and a roller bracket 5. 2 for mounting the roller 5.1.
  • the casing 1 is provided with a support base 6, the roller 2 ⁇ The support of the support of the support of the support.
  • the roller brackets 5. 2 are provided with arcuate slots 6 for the support of the roller brackets.
  • the first ball 5.3 slides in the arcuate groove 6.1, the arc is slid. 1 ⁇
  • the depth and width of the positioning groove 6.2 is greater than the curved groove 6.1.
  • the depth and the width of the positioning groove are both Larger than the arcuate groove, and due to the elasticity of the first spring, the first ball is caught in the positioning groove, thus limiting the rotation angle of the roller bracket, and at the position between the two ends of the curved groove, due to the arc
  • the guiding action of the groove, so that the roller bracket is slightly rotated, the roller bracket will rotate within the range of the arc groove. Limiting the ends of the arc groove is to prevent the excessive force from damaging the roller bracket when the roller bracket is screwed out, and to play the role of positioning when the roller bracket is reset.
  • the center of the roller 5.1 is provided with an axial shaft hole 5.6.
  • the first spring is provided with a second spring 5. 8 which is perpendicular to the axial direction.
  • the number of the card slots 5. 10, the number of the same as the number of the tool chambers 5. 5
  • the two balls 5.9 fit with the card slot 5.10.
  • the bottom surface of the slot 5.10 is a curved surface for receiving the second ball.
  • the sleeve is provided with a sleeve, a sleeve, and the sleeve is provided with a sleeve, a sleeve, and a sleeve.
  • the singularity of the inner tube 5.2.2 can be rotated inside the inner tube 5.
  • the two of the inner tube 5. 2 are fixed by the support seat 6 provided on the casing 5 to fix the inner tube 5.
  • the end is fixed to the inner tube 5. 2. 2 fixed.
  • the front and rear directional expressions are as shown in the figure, the inner radial surface of the inner tube 5. 2 is provided with a first radial projection 5. 2, the first radial projection 5. 2 has two front and rear end faces 2 2 circumferentially distributed; 2. 4, circumferentially distributed along the outer tube 5. 2. 2 circumferentially distributed; outer tube 5. The second radial projection 5. 2, the second radial projection 5. 2 has two front and rear end faces, the second radial projection 5. 2 The second rearward surface is provided with a steel ball which is axially supported by the elastic member. The steel ball is respectively matched with the spherical recess 5.2.4 in accordance with the position of the roller support 5.2. In this example, the second radial projection 5. 2.
  • the first radial projection 5.2.3 is a fan-shaped projection.
  • the recommended component is a component for transferring a tool between a tool chuck and a tool magazine, and includes a push rod 7 for pushing the tool To the position of the tool chuck; transmission 3,
  • the transmission 3 includes a gearbox 3. 1, a push rod
  • the baffle 8 is rotatably connected to the gearbox 3.1, the gearbox is a cylindrical structure, the axis of rotation of the pusher baffle 8 is the same as the axis of the gearbox, and the pusher baffle 8 is further provided with an elastic reset mechanism.
  • the pusher bar 8 is directly opposite the pusher 7, and is opposite to the rear end face of the pusher 7.
  • the pusher bar 8 When the elastic return mechanism is in the state of accumulating force, the pusher bar 8 is rotated to be offset to the side, offset The position of the push rod 7 is moved; the spring return mechanism is a tension spring 15 in the embodiment, and the push rod block 8 is provided with a pull hook, one end of the tension spring 15 is hooked on the pull hook, and the other end is fixed to the gearbox 3 . 1 on the outer casing.
  • the push rod 7 is further provided with a push rod connecting piece 9 and a push rod button 10, wherein the push rod 7 is provided with a first protrusion 11 , and the push rod connecting piece 9 is provided with a long hole 12, The first protrusion 11 of the push rod 7 is slidably fitted in the long hole 12, and the push rod connecting piece 9 can drive the push rod 7 to move back and forth.
  • the push rod button 10 is connected with the push rod connecting piece 9 for pushing the push rod connection.
  • the sheet 9 and the push rod 7 move axially; the push rod button 10 extends The outside of the casing 1 of the power tool is for human driving. The axial movement, that is, the push rod 7 moves back and forth.
  • the top end of the pusher bar 8 is provided with a cylindrical second protrusion 13 which is provided with a second protrusion 13 for moving the pusher block 8 when moving.
  • the third protrusion 14. Both sides of the third projection 14 are beveled.
  • the end faces of the third protrusions 14 and the joints on both sides are chamfered. With this configuration, the second projection 13 is made smoother and smoother with respect to the movement of the third projection 14.
  • the push button When the tool is changed, as shown in FIG. 15, the push button is pushed backward to drive the pusher link to move backward, so that the third protrusion 14 on the pusher link 9 pushes the second protrusion on the pusher block.
  • the pusher flap is rotated laterally to give up the position, so that the push rod 7 is freely pushed backward, and the elastic return mechanism is in the state of accumulating, as shown in Fig. 16, when the push rod 7 continues to push backwards, The push rod 7 abuts against the push rod stopper 8 to prevent the push rod stopper 8 from being reset, so that the push rod can be smoothly moved back and forth.
  • the push rod connecting piece 9 is provided with a long hole 12, and the first protrusion 11 on the push rod 7 can slide in the long hole, so that at the beginning, as shown in FIG. 14, the first protrusion 11 is in the long hole 12
  • the push rod connecting piece 9 moves backward, since the first protrusion 11 slides in the long hole 12, the push rod 7 does not move.
  • the push rod connecting piece 9 has moved backward to make the push rod block
  • the sheet 8 is rotated sideways until the pusher flap 8 is completely retracted, that is, when the rear end surface of the push rod 7 is not again pressed, the first projection 11 slides to the front end of the long hole 12, as shown in FIG.
  • a projection 11 abuts against the front end of the long hole 12, so that the push rod connecting piece 9 can just move the push rod 7 backward.
  • a distance of the push rod stopper is reserved, thereby preventing the push rod from being unsmooth when moving backward.
  • the embodiment is an electric screwdriver
  • the cutter is a batch of an electric screwdriver
  • the power tool can be configured according to different types of tools in the tool magazine, such as an electric wrench, an electric drill, etc.
  • the structure according to the present invention is also within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

一种电动工具，包括机壳（1）、电机（2）、传动装置（3）、刀具卡头（4）以及滚筒式刀具库（5），其中滚筒式刀具库（5）中的刀具室（5.5）可每次调整到一个可将刀具室（5.5）中的刀具转移给刀具卡头（4）的位置上，传动装置（3）的传动轴（3.3）设在滚筒式刀具库（5）的外侧，滚筒式刀具库（5）与机壳（1）转动连接。该电动工具不需要拆开机壳即可将滚筒式刀具库旋出，以便更换刀具库中的刀具。

Description

电动工具 技术领域
本发明涉及一种带有滚筒式刀具库，并可旋转刀具库以更换刀具的手持式电 动工具。
背景技术
公开号为 CN101563192的中国专利申请公开了一种带有滚筒式刀具库的电 动工具。 该电动工具具有***形机壳， 以及具有在枪管方向上延伸的主轴线， 电 动工具输出轴在枪管方向的出口处， 为一刀具卡头， 机壳内装有电机、滚筒式刀 具库以及传动装置，滚筒式刀具库为圆柱形构造，滚筒式刀具库的轴线和刀具卡 头的轴线平行于主轴线， 滚筒式刀具库在自身上环形设有与主轴线平行的刀具 室，这些刀具室分别根据滚筒式刀具库的旋转位置占据与刀具卡头对正的重叠位 置， 在该重叠位置中， 对应的刀具能够在刀具室和刀具卡头之间转移， 所述转移 通过处于与刀具卡头同轴的， 在壳体外侧受导向的操作滑件形式的执行机构实 现。滚筒式刀具库同样制成在壳体上， 并且滚筒式刀具库被刀具室包围的中心区 域中被传动装置的传动轴贯穿，转动轴穿过该刀具库并通过齿轮与刀具卡头驱动 式连接， 可带动刀具卡头转动。
采用这种结构的电动工具如果要更换刀具库中的刀具， 则需要将整个刀具 库拆下来， 这样就需要拆整个机壳， 非常不方便。
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， 提供了一种更换刀 具库中的刀具简单方便的电动工具。
为解决上述技术问题， 本发明提出一种电动工具， 它包括机壳、 电机、 传动 装置、刀具卡头以及滚筒式刀具库，所述滚筒式刀具库中的刀具室可每次调整到 一个可将刀具室中的刀具转移给刀具卡头的位置上，所述传动装置的传动轴设在 滚筒式刀具库的外侧， 所述滚筒式刀具库与机壳转动连接。
所述传动装置与电机驱动连接，传动装置包括变速箱、第一齿轮组、传动轴、 第二齿轮组， 电机的输出轴与变速箱连接，变速箱的输出轴通过第一齿轮组连接 传动轴，所述传动轴设在滚筒式刀具库的外侧，所述传动轴的另一端通过第二齿 轮组与刀具卡头连接， 用来带动刀具卡头转动。在启动电动工具时， 电机带动传 动装置的输出轴转动，并通过传动轴以及第一齿轮组和第二齿轮组带动刀具卡头 转动， 完成电动工具的动作。
所述滚筒式刀具库包括与滚筒式刀具库同轴的滚轮以及用于安装滚轮的滚 轮支架， 所述机壳内设有支撑座， 所述滚轮支架转动连接在支撑座内， 转动轨迹 所在平面垂直于滚轮的轴线。
实施例之一为：所述支撑座上还设有用于滚轮支架转动导向以及限位的弧形 槽，所述滚轮支架上设有与弧形槽配合的端部带有第一滚珠的第一弹簧，滚轮支 架转动时，第一滚珠在弧形槽内滑动，所述弧形槽的两端均设有用于限位的定位 槽， 所述定位槽的深度和宽度均大于弧形槽。采用这种结构， 在滚轮支架转动时 对滚轮支架进行导向以及限位， 第一滚珠在滑动到弧形槽两端的定位槽的位置 时， 由于定位槽的深度和宽度均大于弧形槽， 并且由于第一弹簧的弹性， 第一滚 珠就卡在定位槽中，这样就对滚轮支架的转动角度和行程进行限制， 而在弧形槽 两端之间的位置时， 由于有弧形槽的导向作用， 因此稍微用力转动滚轮支架， 滚 轮支架就会在弧形槽的范围内转动。对弧形槽首尾两端进行限位， 是在将滚轮支 架旋出时， 防止用力过大而损坏滚轮支架， 以及在复位滚轮支架时， 起到定位的 作用。
作为实施例之二为： 所述滚轮支架设有套管， 套管包括相互套接可相对转动 的内管和外管， 外管作为滚轮支架转动的转动轴，所述的内管套在电动工具的传 动轴上，传动轴可在内管内转动， 内管作为支撑座与电动工具的机壳连接以实现 内管固定不动并起到支撑传动轴的作用。采用上述结构后，将套管与传动轴有机 联系起来， 不需要避开传动轴来设置支架， 由此避免了传动轴与支架的矛盾所带 来的电动工具结构变大等问题， 实现了一种紧凑型结构设计， 同时还方便使用， 因此具有结构紧凑、 使用方便的优点。
作为改进， 内管外表面上设有第一径向凸起，第一径向凸起前端面上设有两 个球形凹陷， 两个球形凹陷沿外管周向分布； 外管外表面上设有第二径向凸起， 第二径向凸起的后端面上设有一个由弹性件轴向支撑的钢球，该钢球依支架转动 位置不同分别与球形凹陷相配， 这样， 两个球形凹陷提供了两个定位点， 即支架 初始位置定位， 支架转出到位定位， 更有利于性能的提高， 用户使用更加方便。 作为改进， 第一径向凸起为扇形凸起， 这样， 更有利于结构紧凑。
所述滚筒式刀具库的滚轮中设有刀具室， 所述滚轮的中心设有轴向的轴孔， 所述滚轮支架上设有轴穿过轴孔与滚轮连接，所述轴上设有垂直于轴线方向的第 二弹簧，所述第二弹簧的两端均连接有第二滚珠，所述轴孔的圆周上设有与刀具 室的数量相对应的卡槽， 所述第二滚珠与卡槽配合。所述卡槽的底面为弧面， 用 于容置第二滚珠。在滚轮支架上转动滚轮时， 可通过卡槽和第二滚珠的配合， 使 每次转动均传动固定的角度，以使每个转动位置的刀具库中的刀具均与刀具卡头 正对应， 不会出现偏差， 使刀具出入刀具库都非常顺畅。
采用上述结构后，本发明具有以下优点： 本发明将传动装置的传动轴设在滚 筒式刀具库的外侧， 而并非穿过滚筒式刀具库， 而且还可以将滚筒式刀具库转动 连接在机壳内，这样不需要拆开机壳就可以将滚筒式刀具库旋出， 以便更换刀具 库中的刀具， 更换之后再旋入机壳中就直接可以使用， 简单方便， 使该电动工具 可携带刀具的种类大大增多， 如各种螺丝批头， 钻头等， 极大地扩展了该电动工 具的使用范围。
所述电动工具还包括推杆， 推杆用于将刀具推到刀具卡头的位置； 它还包括转动连接在传动装置上，并且其转动轨迹所在的平面与推杆的轴线 垂直的推杆挡片，所述推杆挡片上还设有弹性复位机构，在自然状态下推杆挡片 正对着推杆， 并与推杆后端面相抵， 在弹性复位机构处于蓄力状态下， 推杆挡片 转动从而向侧面偏移， 偏离出推杆运动的位置；
所述推杆上还设有推杆连接片以及推杆按钮，所述推杆上设有第一凸起，所 述推杆连接片上设有长孔，所述推杆的第一凸起滑动配合在长孔中，所述推杆按 钮与推杆连接片连接， 用于推动推杆连接片以及推杆轴向移动；
所述推杆挡片的顶端设有圆柱形的第二凸起，所述推杆连接片上设有在移动 时可抵住第二凸起从而使推杆挡片转动的第三凸起。采用上述结构后，本发明具 有以下优点： 在电动工具工作时， 弹性复位机构处于自然状态， 此时， 推杆的后 端面与推杆挡片相抵， 因此可以防止电动工具的刀具向后移动。
在更换刀具时， 推动推杆按钮向后移动， 带动推杆连接片向后移动， 从而推 杆连接片上的第三凸起推动推杆挡片上的第二凸起，从而使推杆挡片转动让出位 置， 方便推杆自由的向后推动， 同时弹性复位机构处于蓄力状态。
而且推杆连接片上设有长孔，推杆上的第一凸起可在长孔中滑动，这样在一 开始， 第一凸起在长孔的后端， 推杆连接片向后移动时， 由于第一凸起在长孔中 滑动， 因此推杆不动， 此时， 推杆连接片已经向后移动使推杆挡片向侧面转动， 一直到推杆挡片完全让开位置， 即没有再抵住推杆后端面时，第一凸起滑动到长 孔的前端， 与长孔前端相抵， 从而推杆连接片刚好可以带动推杆向后移动。从而 防止推杆在向后移动时不顺畅。
作为优选， 所述弹性复位机构为拉簧， 所述拉簧一端连接在驱动单元上， 另 一端连接在推杆挡片上。 采用拉簧作为弹性复位机构， 结构简单， 成本较低。 附图说明
图 1为本发明的剖视示意图；
图 2为本发明滚筒式刀具库旋出状态的结构示意图；
图 3为本发明滚筒式刀具库旋入状态的结构示意图；
图 4为本发明实施例之一的滚轮支架的安装结构示意图；
图 5为滚轮支架旋出时的安装结构示意图；
图 6为图 5的 A部放大示意图；
图 7为图 6的 C-C向剖视示意图；
图 8为滚轮与滚轮支架的安装结构示意图；
图 9为滚轮与滚轮支架安装的剖视示意图；
图 10为实施例之二的电动工具的轴向剖视示意图；
图 11为图 10的 A-A向剖视示意图；
图 12为图 10的 C-C向支架为初始位置时的剖视示意图；
图 13为图 10的 C-C向支架为转出到位时的剖视示意图；
图 14为本发明电动工具工作时推杆组件的结构示意图；
图 15为本发明推杆组件在向后推动时的结构示意图；
图 16为本发明推杆组件在向后推动之后的结构示意图；
如图所示： 1、 机壳， 2、 电机， 3、 传动装置， 3. 1、 变速箱， 3. 2、 第一齿 轮组， 3. 3、 传动轴， 3. 4、 第二齿轮组， 4、 刀具卡头， 5、 滚筒式刀具库， 5. 1、 滚轮， 5. 2、滚轮支架， 5. 2. 1、内管， 5. 2. 2、外管， 5. 2. 3、第一径向凸起， 5. 2. 4、 球形凹陷， 5. 2. 5、 第二径向凸起， 5. 3、 第一滚珠， 5. 4、 第一弹簧， 5. 5、 刀具 室， 5. 6、 轴孔， 5. 7、 轴， 5. 8、 第二弹簧， 5. 9、 第二滚珠， 5. 10、 卡槽， 6、 支撑座， 6. 1、 弧形槽， 6. 2、 定位槽， 7、 推杆， 8、 推杆挡片， 9、 推杆连接片， 10、 推杆按钮， 11、 第一凸起， 12、 长孔， 13、 第二凸起， 14、 第三凸起， 15、 拉簧。
具体实 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：
作为本发明电动工具的实施例之一为一***式电动螺丝批，下面以该电动螺 丝批为例详述本发明：
如图 1-9所示： 一种电动工具， 它包括机壳 1、 电机 2、 传动装置 3、 刀具 卡头 4以及滚筒式刀具库 5， 机壳 1为***形状的机壳， 枪口的位置设有刀具卡 头 4同来卡住刀具并带动刀具转动，本实施例所述刀具为螺丝批的批头， 刀具卡 头 4的后面设有滚筒式刀具库 5， 所述滚筒式刀具库 5中的刀具室 5. 5可每次调 整到一个可将刀具室 5. 5中的刀具转移给刀具卡头 4的位置上， 滚筒式刀具库 5 的后面设有推杆 7， 推杆 7与刀具卡头 4在同一轴线上， 并可穿过滚筒式刀具库 5中的刀具室 5. 1， 将刀具推到刀具卡头 4中， 并可通过设在推杆端部的磁铁将 刀具吸回刀具库 5中， 所述电机 2设在滚筒式刀具库 5的后面， 所述传动装置 3 的传动轴 3. 3设在滚筒式刀具库 5的外侧，本实施例中传动轴 3. 3设在滚筒式刀 具库 5的下方， 也可以设在滚筒式刀具库 5的侧方， 总之， 不与滚筒式刀具库 5 接触， 所述滚筒式刀具库 5与机壳 1转动连接。
所述传动装置 3与电机 2驱动连接， 传动装置 3包括变速箱 3. 1、 第一齿轮 组 3. 2、 传动轴 3. 3、 第二齿轮组 3. 4， 电机 2的输出轴与变速箱 3. 1连接， 变 速箱 3. 1的输出轴通过第一齿轮组 3. 2连接传动轴 3. 3， 所述传动轴 3. 3设在滚 筒式刀具库 5的外侧，所述传动轴 3. 3的另一端通过第二齿轮组 3. 4与刀具卡头 4连接， 用来带动刀具卡头 4转动。 在启动电动工具时， 电机带动传动装置的输 出轴转动， 并通过传动轴以及第一齿轮组和第二齿轮组带动刀具卡头转动，完成 电动工具的动作。
当然， 所述传动装置 3的变速箱 3. 1， 也可以设在滚筒式刀具库 5的前方， 这样电机 2的输出轴就直接通过第一齿轮组 3. 2与传动轴 3. 3连接， 传动轴 3. 3 的另一端再连接变速箱 3. 1，变速箱 3. 1再通过第二齿轮组 3. 4带动刀具卡头 4， 总之，不管转动装置 3如何设置，只要其传动轴 3. 3设在滚筒式刀具库 5的外侧， 则均在本发明保护范围之内。
所述滚筒式刀具库 5包括与滚筒式刀具库同轴的滚轮 5. 1以及用于安装滚轮 5. 1的滚轮支架 5. 2, 所述机壳 1内设有支撑座 6， 所述滚轮支架 6. 2转动连接 在支撑座 6上， 转动轨迹所在平面垂直于滚轮 5. 1的轴线。
图 4-7所示，所述支撑座 6上还设有用于滚轮支架 5. 2转动导向以及限位的 弧形槽 6. 1，所述滚轮支架 5. 2上设有与弧形槽 6. 1配合的端部带有第一滚珠 5. 3 的第一弹簧 5. 4， 滚轮支架 5. 2转动时， 第一滚珠 5. 3在弧形槽 6. 1内滑动， 所 述弧形槽 6. 1的两端均设有用于限位的定位槽 6. 2, 所述定位槽 6. 2的深度和宽 度均大于弧形槽 6. 1。 采用这种结构， 在滚轮支架 5. 2转动时对滚轮支架 5. 2进 行导向以及限位，第一滚珠在滑动到弧形槽两端的定位槽的位置时， 由于定位槽 的深度和宽度均大于弧形槽， 并且由于第一弹簧的弹性，第一滚珠就卡在定位槽 中， 这样就对滚轮支架的转动角度进行限制， 而在弧形槽两端之间的位置时， 由 于有弧形槽的导向作用， 因此稍微用力转动滚轮支架，滚轮支架就会在弧形槽的 范围内转动。对弧形槽首尾两端进行限位， 是在将滚轮支架旋出时， 防止用力过 大而损坏滚轮支架， 以及在复位滚轮支架时， 起到定位的作用。
图 8、 图 9所示， 所述滚筒式刀具库 5的滚轮 5. 1中设有刀具室 5. 5， 所述 滚轮 5. 1的中心设有轴向的轴孔 5. 6， 所述滚轮支架 5. 2上设有轴 5. 7穿过轴孔 5. 6与滚轮 5. 1连接， 所述轴上 5. 7设有垂直于轴线方向的第二弹簧 5. 8， 所述 第二弹簧 5. 8的两端均连接有第二滚珠 5. 9， 所述轴孔 5. 7的圆周上设有与刀具 室 5. 5的数量相对应的卡槽 5. 10， 所述第二滚珠 5. 9与卡槽 5. 10配合。 所述卡 槽 5. 10的底面为弧面， 用于容置第二滚珠。 在滚轮支架上转动滚轮时， 可通过 卡槽和第二滚珠的配合，使每次转动均传动固定的角度， 以使每个转动位置的刀 具库中的刀具均与刀具卡头正对应， 不会出现偏差，使刀具出入刀具库都非常顺 畅。
图 10-13为本发明传动轴安装在滚筒式刀具库外侧的另一实施方式，滚筒式 刀具库 5包括有的滚轮支架 5. 2， 所述滚轮支架 5. 2设有套管， 套管包括相互套 接可相对转动的内管 5. 2. 1和外管 5. 2. 2, 外管 5. 2. 2作为滚轮支架 5. 2转动的 转动轴，所述的内管 5. 2. 2套在电动工具的传动轴 3. 3上，传动轴 3. 3可在内管 5. 2. 2内转动，内管 5. 2. 2与电动工具的机壳 1连接以实现内管 5. 2. 2固定不动， 本例中，用设在机壳 5上的支撑座 6来形成固定孔来固定内管 5. 2. 2的两端以实 现内管 5. 2. 2固定不动。
前后方向性表述如图中所示，内管 5. 2. 2外表面上设有第一径向凸起 5. 2. 3， 第一径向凸起 5. 2. 3具有前后两个端面，第一径向凸起 5. 2. 3前端面上设有两个 球形凹陷 5. 2. 4， 两个球形凹陷 5. 2. 4沿外管 5. 2. 2周向分布； 外管 5. 2. 2外表 面上设有第二径向凸起 5. 2. 5， 第二径向凸起 5. 2. 5具有前后两个端面， 第二径 向凸起 5. 2. 5的后端面上设有一个由弹性件轴向支撑的钢球，该钢球依滚轮支架 5. 2转动位置不同分别与球形凹陷 5. 2. 4相配， 本例中， 第二径向凸起 5. 2. 5设 置一轴向盲孔，轴向盲孔内放入一弹簧，钢球压入盲孔且钢球的一部分露出盲孔， 由于第二径向凸起 5. 2. 5的遮挡， 弹簧、钢球在图中不可见， 但不妨碍正确理解 该技术细节。
第一径向凸起 5. 2. 3为扇形凸起。
图 14-16为本发明中推杆组件的结构示意图，推荐组件即是将刀具在刀具卡 头和刀具库之间进行位置转移的部件， 它包括推杆 7， 推杆 7用于将刀具推到刀 具卡头的位置； 传动装置 3，
它还包括转动连接在传动装置 3 上， 并且其转动轨迹所在的平面与推杆 7 的轴线垂直的推杆挡片 8， 在本实施例中， 传动装置 3包括变速箱 3. 1， 推杆挡 片 8转动连接在变速箱 3. 1上，变速箱为一圆柱形结构，推杆挡片 8转动的轴线 与变速箱的轴线相同，所述推杆挡片 8上还设有弹性复位机构，在自然状态下推 杆挡片 8正对着推杆 7， 并与推杆 7后端面相抵， 在弹性复位机构处于蓄力状态 下， 推杆挡片 8转动从而向侧面偏移， 偏离出推杆 7运动的位置； 本实施例中所 述弹簧复位机构为一拉簧 15， 推杆挡片 8上设有拉钩， 拉簧 15的一端钩在该拉 钩上， 另一端固定在变速箱 3. 1的外壳上。
所述推杆 7上还设有推杆连接片 9以及推杆按钮 10， 所述推杆 7上设有第 一凸起 11，所述推杆连接片 9上设有长孔 12，所述推杆 7的第一凸起 11滑动配 合在长孔 12中，推杆连接片 9可带动推杆 7前后移动，所述推杆按钮 10与推杆 连接片 9连接， 用于推动推杆连接片 9以及推杆 7轴向移动； 推杆按钮 10伸出 电动工具的机壳 1外， 供人推动。 所述的轴向移动即推杆 7前后移动。
所述推杆挡片 8的顶端设有圆柱形的第二凸起 13， 所述推杆连接片 9上设 有在移动时可抵住第二凸起 13从而使推杆挡片 8转动的第三凸起 14。所述第三 凸起 14的的两个侧面均为斜面。 在推杆连接片 9移动时， 侧面与第二凸起 13 相抵， 将前后方向的力转换为侧面方向的力， 从而推动推杆挡片 8转动。
所述第三凸起 14的端面与两侧面的连接处均设有倒角。 采用这种结构使第 二凸起 13相对于第三凸起 14运动时更加平滑顺畅。
在电动工具工作时， 如图 14所示， 推杆向前移动到最大位置， 此时弹性复 位机构处于自然状态， 拉簧 15拉着推杆挡片 8， 使推杆挡片 8与推杆 7的后端 面相抵， 因此可以防止电动工具的刀具向后移动。
在更换刀具时， 如图 15所示， 推动推杆按钮向后移动， 带动推杆连接片向 后移动， 从而推杆连接片 9上的第三凸起 14推动推杆挡片上的第二凸起 13， 从 而使推杆挡片侧向转动让出位置， 方便推杆 7自由的向后推动， 同时弹性复位机 构处于蓄力状态， 如图 16所示， 推杆 7继续向后推动时， 推杆 7抵住推杆挡片 8防止推杆挡片 8复位， 从而使推杆可以顺畅的前后移动。
而且推杆连接片 9上设有长孔 12，推杆 7上的第一凸起 11可在长孔中滑动， 这样在一开始， 如图 14所示， 第一凸起 11在长孔 12的后端， 推杆连接片 9向 后移动时， 由于第一凸起 11在长孔 12中滑动， 因此推杆 7不动， 此时， 推杆连 接片 9已经向后移动使推杆挡片 8向侧面转动，一直到推杆挡片 8完全让开位置， 即没有再抵住推杆 7后端面时， 第一凸起 11滑动到长孔 12的前端， 如图 15所 示， 第一凸起 11与长孔 12前端相抵， 从而推杆连接片 9刚好可以带动推杆 7 向后移动。使推杆 7在向后移动时， 预留了一段推杆挡片的避开距离， 从而防止 推杆在向后移动时不顺畅。
虽然实施例为电动螺丝批，所述刀具为电动螺丝批的批头，但是该电动工具 可根据刀具库中的刀具的种类不同构成不同种类的电动工具， 如电动扳手、 电钻 等， 则若采用如本发明所述结构， 也在本发明保护范围之内。

Claims

权利要求书
1、一种电动工具， 它包括机壳（1)、 电机（2)、传动装置（3)、刀具卡头（4) 以及滚筒式刀具库 （5)， 所述滚筒式刀具库 （5) 中的刀具室 （5.5)可每次调整 到一个可将刀具室（5.5)中的刀具转移给刀具卡头（4)的位置上， 其特征在于: 所述传动装置 （3) 的传动轴 （3.3) 设在滚筒式刀具库 （5) 的外侧， 所述滚筒 式刀具库 （5) 与机壳 （1) 转动连接。
2、 根据权利要求 1所述的电动工具， 其特征在于： 所述传动装置 （3) 与电 机 （2) 驱动连接， 传动装置 （3)包括变速箱 （3.1)、 第一齿轮组 （3.2)、 传动 轴 （3.3)、 第二齿轮组 （3.4)， 电机（2) 的输出轴与变速箱 (3.1)连接， 变速箱 (3.1)的输出轴通过第一齿轮组 (3.2)连接传动轴 (3.3)， 所述传动轴 (3.3)的另 一端通过第二齿轮组 （3.4) 与刀具卡头 （4) 连接， 用来带动刀具卡头 （4) 转 动。
3、 根据权利要求 1所述的电动工具， 其特征在于： 所述滚筒式刀具库 （5) 包括与滚筒式刀具库同轴的滚轮 （5.1) 以及用于安装滚轮 （5.1) 的滚轮支架
(5.2)， 所述机壳（1) 内设有支撑座 （6)， 所述滚轮支架 （6.2)转动连接在支 撑座 （6) 上， 转动轨迹所在的平面垂直于滚轮 （5.1) 的轴线。
4、 根据权利要求 3所述的电动工具， 其特征在于： 所述支撑座（6)上还设 有用于滚轮支架（5.2)转动导向以及限位的弧形槽（6.1)， 所述滚轮支架（5.2) 上设有与弧形槽（6.1)配合的端部带有第一滚珠（5.3) 的第一弹簧（5.4)， 滚 轮支架（5.2)转动时，第一滚珠 (5.3)在弧形槽（6.1)内滑动，所述弧形槽（6.1) 的两端均设有用于限位的定位槽 （6.2)， 所述定位槽 （6.20 的深度和宽度均大 于弧形槽 (6. D o
5、 根据权利要求 3所述的电动工具， 其特征在于： 所述滚轮支架（5.2)设 有套管， 套管包括相互套接可相对转动的内管 （5.2.1) 和外管 （5.2.2)， 外管
(5.2.2) 作为滚轮支架 （5.2) 转动的转动轴， 所述的内管 （5.2.1) 套在电动 工具的传动轴（3.3)上，传动轴（3.3)可在内管（5.2.1)内转动， 内管（5.2.1) 作为支撑座与电动工具的机壳（1)连接以实现内管（5.2.1) 固定不动并起到支 撑传动轴 （3.3) 的作用。
6、 根据权利要求 5所述的电动工具， 其特征在于， 内管 （5.2.1) 外表面上 设有第一径向凸起 （5.2.3)， 第一径向凸起 （5.2.3) 前端面上设有两个球形凹 陷 （5.2.4)， 两个球形凹陷 （5.2.4)沿外管 （5.2.2)周向分布； 外管 （5.2.2) 外表面上设有第二径向凸起 （5.2.5)， 第二径向凸起 （5.2.5) 的后端面上设有 一个由弹性件轴向支撑的钢球， 该钢球依滚轮支架 （5.2) 转动位置不同分别与 球形凹陷 （5.2.4) 相配。
7、 根据权利要求 3所述的电动工具， 其特征在于： 所述滚筒式刀具库 （5) 的滚轮（5.1)中设有刀具室（5.5)，所述滚轮（5.1)的中心设有轴向的轴孔（5.6)， 所述滚轮支架 （5.2) 上设有轴 （5.7) 穿过轴孔（5.6)与滚轮（5.1)连接， 所述 轴上 （5.7)设有垂直于轴线方向的第二弹簧（5.8)， 所述第二弹簧（5.8) 的两 端均连接有第二滚珠（5.9)， 所述轴孔（5.7) 的圆周上设有与刀具室（5.5) 的 数量相对应的卡槽 （5.10)， 所述第二滚珠 （5.9) 与卡槽 （5.10) 配合。
8、 根据权利要求 1-7任一项所述的电动工具， 其特征在于： 所述电动工具 为电动螺丝批， 所述刀具为电动螺丝批的批头。
9、根据权利要求 1-7任一项所述的电动工具，其特征在于：它包括推杆（7)， 它还包括转动连接在传动装置上， 并且其转动轨迹所在的平面与推杆 （7) 的轴 线垂直的推杆挡片 （8)， 所述推杆挡片 （8) 上还设有弹性复位机构， 在自然状 态下推杆挡片 （8)正对着推杆（7)， 并与推杆（7)后端面相抵， 在弹性复位机 构处于蓄力状态下， 推杆挡片 （8)转动从而向侧面偏移， 偏离出推杆（7)运动 的位置；
所述推杆（7)上还设有推杆连接片（9) 以及推杆按钮（10)， 所述推杆（7) 上设有第一凸起 （11)， 所述推杆连接片 （9) 上设有长孔 （12)， 所述推杆 （7) 的第一凸起（11)滑动配合在长孔 （12) 中， 所述推杆按钮（10)与推杆连接片 (9) 连接， 用于推动推杆连接片 （9) 以及推杆 （7) 轴向移动；
所述推杆挡片（8)的顶端设有圆柱形的第二凸起（13)，所述推杆连接片（9) 上设有在移动时可抵住第二凸起（13)从而使推杆挡片（8)转动的第三凸起（14)。
10、 根据权利要求 9所述的电动工具， 其特征在于： 所述弹性复位机构为拉 簧（15)， 所述拉簧（15)—端连接在传动装置（3)上， 另一端连接在推杆挡片 (8) 上。
PCT/CN2014/070693 2013-11-20 2014-01-16 电动工具 WO2014146506A1 (zh)

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Application Number Priority Date Filing Date Title
CN201310586734.8 2013-11-20
CN201310586734.8A CN103600335B (zh) 2013-11-20 2013-11-20 电动工具
CN201310731372.7A CN103722538B (zh) 2013-12-26 2013-12-26 刀具库支撑结构
CN201310731372.7 2013-12-26
CN201310743073.5 2013-12-30
CN201310743073.5A CN103707274B (zh) 2013-12-30 2013-12-30 电动工具推杆组件

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