WO2021012531A1 - 一种动力工具及其附件和动力工具的安装方法 - Google Patents

一种动力工具及其附件和动力工具的安装方法 Download PDF

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Publication number
WO2021012531A1
WO2021012531A1 PCT/CN2019/118755 CN2019118755W WO2021012531A1 WO 2021012531 A1 WO2021012531 A1 WO 2021012531A1 CN 2019118755 W CN2019118755 W CN 2019118755W WO 2021012531 A1 WO2021012531 A1 WO 2021012531A1
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WO
WIPO (PCT)
Prior art keywords
chuck
accessory
housing
power tool
input shaft
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Application number
PCT/CN2019/118755
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English (en)
French (fr)
Inventor
郑悦
钟红风
张士松
孙益民
Original Assignee
苏州宝时得电动工具有限公司
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Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2021012531A1 publication Critical patent/WO2021012531A1/zh

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    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates to the technical field of power tools, in particular to a power tool and its accessories.
  • power tool function attachments are extremely versatile and diverse. After the structure of these functional accessories and power tools, it can meet the needs of different working conditions; for example, in order to improve the accessibility of the tool, an eccentric accessory can be attached to the original tool, so that the distance between the output shaft of the accessory and the workpiece is longer than that of the tool spindle The distance to the workpiece is closer; for example, in order to increase the speed of the output shaft, you can attach a speed increasing mechanism attachment, so that the speed of the output shaft of the attachment is higher than the speed of the tool spindle; for example, to slow down the speed of the output shaft, you can add a The speed reduction mechanism attachment makes the speed of the output shaft of the attachment lower than the speed of the tool spindle, etc.
  • the working head is mostly clamped by the three jaws of the chuck.
  • the drill bit can be punched after being clamped by the jaws of the chuck.
  • the screw can be screwed after the jaws of the head are clamped.
  • the existing chuck performs work after the working head is installed, the outer shell of the chuck rotates along with the core body of the chuck. If one of the aforementioned functional accessories is to be attached to a power tool with this type of chuck, the following method is usually used: Method one is to remove the three-jaw chuck from the power tool, and then match the functional accessory with the power tool body.
  • the second method is to not need to remove the chuck from the power tool, but to use a connecting mechanism to connect the accessory with the body shell, and then fasten the claw to the drive shaft clamp of the accessory;
  • the third method is direct Clamp the jaws with the drive shaft of the accessory to prevent shaking, and use the hand to support the accessory shell to stop rotation.
  • the disassembly and installation of the chuck in the first method are time-consuming and troublesome to operate; the connecting mechanism of the second method needs to cross the distance of the chuck and connect with the main chassis, which will be bulky, which is not conducive to the miniaturization of the structure; the operation method of the third method , To prevent shaking and supporting with hands, not only is not humane enough, but also has potential safety hazards.
  • the present invention provides an improved power tool.
  • the present invention provides a power tool, which includes:
  • the chuck includes a chuck housing, a chuck core body arranged in the chuck housing to be rotated by the motor, a plurality of jaws arranged on the chuck core body, and threaded connection with the plurality of jaws
  • the driving part of the chuck, the plurality of claws relative to the core body can move between a mutually close position and a mutually separated position; the chuck housing is fixedly arranged relative to the main housing, and the chuck housing is provided with a clamp Head interface
  • the accessory is detachably mated with the chuck, the accessory includes an accessory housing and an accessory body at least partially contained in the accessory housing, and the accessory housing is provided with an interface portion for connecting with the chuck
  • the accessory interface part of interference fit the accessory body is movably arranged relative to the accessory housing, the accessory body includes an input shaft, and an output shaft connected to the input shaft, when the accessory interface part and the chuck interface
  • the input shaft can be clamped by the claws, so that the power of the motor can be transmitted to the output shaft through the input shaft.
  • the chuck housing does not rotate, and the interference fit between the chuck interface and the accessory interface eliminates the need for tools and fasteners, making the installation of the accessory simple in structure, easy to operate, and It is conducive to the miniaturization of the whole machine; the input shaft is fixed by the clamping jaws to ensure the output coaxiality of the chuck core body and the accessory body, so that the transmission is stable.
  • the power tool includes a mode conversion mechanism that is operable to switch the power tool between a chuck mode and a drilling mode; when the power tool is in the chuck mode, the motor drives the One of the chuck core body and the drive member rotates relative to the other of the two, so that the plurality of clamping jaws can move relative to the chuck body core body to clamp the input shaft or release the input shaft; When the power tool is in the drilling mode, the several jaws clamp the input shaft and can continuously output power for the output shaft.
  • a mode conversion mechanism that is operable to switch the power tool between a chuck mode and a drilling mode
  • the chuck core may be fixed relative to the chuck housing, and the motor drives the driving member to move relative to the chuck core, thereby driving the A number of claws move relative to the core between a position close to each other and a position separated from each other.
  • the driving member is a nut sleeve arranged on the outer side of the plurality of claws.
  • the power tool has a chuck mode to fix or release the fixed accessory more conveniently; and the drilling mode of the power tool ensures a stable power source for the accessory.
  • the accessory interface portion includes at least one first connecting portion
  • the chuck interface portion includes a second connecting portion corresponding to the first connecting portion
  • the first connecting portion and the second connecting portion One of the connecting parts is configured as a convex block, and the other is configured as a recess matched with the convex block.
  • the cooperation of the protrusion and the recess can easily connect the accessory to the chuck shell, which is convenient for disassembly and assembly and accurate positioning; of course, other structures that can connect and position the accessory and the chuck, It also belongs to the protection scope of the present invention, such as buckles, positioning pins, etc.
  • the present invention also provides an accessory, which is detachably mated with a chuck of a power tool.
  • the power tool includes a main housing; a motor housed in the main housing; In the chuck housing, a chuck core body driven by the motor, a plurality of claws arranged on the chuck core body, and a driving member threadedly connected with the plurality of claws, the plurality of claws are opposed to the core body It can move between a mutually close position and a mutually separated position; the chuck housing is fixedly arranged relative to the main housing, the chuck housing is provided with a chuck interface, and the accessory includes:
  • An accessory housing the accessory housing is provided with an accessory interface for interference fit with the chuck interface;
  • the accessory body the accessory body is movably arranged relative to the accessory housing, the accessory body includes an input shaft and an output shaft that are connected to each other, and the input shaft is used when the accessory interface part is mated with the chuck interface part It can be clamped by the several jaws, so that the power of the motor can be transmitted to the output shaft through the input shaft.
  • the accessory connection operation is convenient and the connection structure is simple, which is more conducive to the miniaturization of the whole machine.
  • the accessory body further includes a transmission mechanism arranged between the input shaft and the output shaft, and the movement of the input shaft is transmitted to the output shaft through the transmission mechanism.
  • the input shaft and the output shaft are arranged in parallel.
  • the position of the output shaft can also be changed to improve accessibility.
  • the input shaft and the output shaft have a speed difference when rotating.
  • the transmission mechanism is configured as a reducer.
  • the accessory can play a role in changing the transmission ratio.
  • the present invention also provides a method for installing a power tool.
  • the power tool includes a main housing; a motor accommodated in the main housing; a chuck, including a chuck housing, and is arranged in the chuck housing.
  • the chuck housing is fixedly arranged relative to the main housing, the chuck housing is provided with a chuck interface; an accessory, the accessory includes an accessory housing and a relative accessory housing
  • a movably arranged accessory body, the accessory housing is provided with an accessory interface part for interference mating with the chuck interface part, when the accessory interface part is mated with the chuck interface part, the input
  • the shaft can be clamped by the several jaws, so that the power of the motor can be transmitted to the output shaft through the input shaft.
  • the installation method includes the following steps: Step 1: Determine whether the input shaft can be inserted into the In the receiving hole, if yes, go to step three; if not, continue to step two; step two: separate the claws from each other; step three: insert the input shaft into the receiving hole, and at the same time insert the accessory interface part Matching with the chuck interface part; Step 4: Bring the several jaws close to each other to clamp the input shaft.
  • the power tool includes a mode conversion mechanism, the mode conversion mechanism is operable to switch the power tool between a chuck mode and a drilling mode; when the power tool is in the chuck mode, the chuck core
  • the body can optionally be fixed relative to the chuck housing, and the motor drives the driving member to rotate relative to the chuck core, so that the plurality of clamping jaws can move relative to the chuck core to clamp the input shaft or release the Input shaft; when the power tool is in the drilling mode, the claws clamp the input shaft and can continuously output power for the output shaft; before the claws are separated or close to each other, set The power tool is in the chuck mode, and then the motor is rotated to drive the claw to move.
  • the present invention has the following advantages:
  • the chuck and the accessories adopt a universal interface, and the power tool chuck can be adapted to multiple types of accessories, which provides a new idea for broadening the application scenarios of power tools.
  • Figure 1 is a three-dimensional schematic diagram of the accessory of the present invention.
  • Figure 2 is a perspective view of the power tool of the present invention
  • Figure 3 is a schematic cross-sectional view of the power tool in Figure 2 with accessories;
  • Figure 4 is a partial cross-sectional view of a power tool in another embodiment with accessories in the drilling mode
  • Fig. 5 is a partial cross-sectional schematic diagram of the power tool of Fig. 4 in a chuck mode when an accessory is fitted.
  • Power tool 1, chuck, 10, jaw, 11, chuck core, 12, chuck shell, 13, recess, 14, screw, 15, chuck interface, 16, first bearing , 17, second bearing, 18, nut sleeve, 19, locking piece, 2, accessory, 20, input shaft, 21, reducer, 22, output shaft, 23, accessory interface, 24, bump, 25, accessory Housing, 3.
  • the accessory 2 is a functional accessory 2, which is used to connect the chuck 1 of the power tool 100.
  • the accessory 2 is configured as an offset accessory.
  • the accessory 2 includes an accessory housing 25 and at least partially accommodated in the accessory.
  • the accessory body in the housing 25.
  • the accessory body specifically includes an input shaft 20, an output shaft 22, and a reducer 21 (shown in FIG. 3) between the input shaft 20 and the output shaft 22.
  • the accessory housing 25 is provided with accessories
  • the interface portion 23, the accessory interface portion 23 includes at least one bump 24, of course, several bumps 24 may also be provided.
  • the accessory interface portion 23 includes four bumps 24 arranged along the circumferential direction of the accessory interface portion, and the accessory body The whole can rotate relative to the accessory housing 25, and the rotational movement of the input shaft 20 is transmitted to the output shaft 22 through the reducer 21, which can achieve the purpose of reducing the transmission ratio.
  • a power tool 100 includes: a main housing 5; a motor 3 housed in the main housing 5, the motor 3 having a motor shaft; a power source that provides power to the motor 3, where The power source of is a DC power source, using a lithium battery pack.
  • the lithium battery pack is a technology well known to those skilled in the art and will not be repeated; the chuck 1 is driven by the motor shaft of the motor 3.
  • the motor 3 and the chuck A transmission mechanism 4 can also be provided between 1 and the transmission mechanism 4 is usually set as a deceleration mechanism, which is a technology well known to those skilled in the art, and will not be described here.
  • the chuck 1 includes a chuck housing 12, a chuck core body 11, a receiving hole in the chuck core body 11, a number of jaws 10 arranged around the receiving hole, and a driving member threadedly connected with the jaws 10;
  • the chuck core 11 is driven by the motor shaft of the motor 3, and there are three claws 10 distributed along the circumference of the chuck core 11;
  • the chuck housing 12 is relatively fixed to the main housing 5 of the power tool 100;
  • the main housing 5 and the chuck housing 12 are installed and fixed by screws 14;
  • the driving part is a nut sleeve 18 arranged on the outside of the jaw 10, and the receiving hole is used for inserting the work head or the accessory input shaft, and the jaw 10 is used for Clamp the work head or input shaft.
  • the chuck housing 12 is provided with a chuck interface portion 15 which includes at least one recess 13.
  • the chuck interface portion 15 includes a plurality of recesses arranged in the circumferential direction of the chuck interface portion 15 13.
  • the recesses 13 and the bumps 24 are in a one-to-one interference fit to prevent the attachment 2 from falling and loosening during the working process of the power tool, thereby improving safety.
  • the power tool 100 includes a drilling mode and a chuck mode.
  • the power tool also includes a mode conversion mechanism (not shown in the figure).
  • the mode conversion mechanism is operable to switch the power tool between the chuck mode and the drilling mode; when the power tool 100 When in the drilling mode, the chuck core 11 is rotatable relative to the chuck housing 12, and the nut sleeve 18 rotates with the jaw 10 and the chuck core 11; the power of the motor 3 is transmitted to the chuck core 11 through the output shaft, Therefore, the chuck core 11 and the nut sleeve 18 rotate together to drive the jaw 10 to continuously output power in a fixed form; when the power tool 100 is in the chuck mode, the chuck core 11 can be fixed relative to the chuck housing 12, and the motor 3
  • the power is transmitted to the nut sleeve 18 through the output shaft, thereby driving the nut sleeve 18 to rotate, the jaw 10 connected with the nut sleeve 18 moves axially, and the jaw 10 fixes the input shaft 20 by axial clamping, or the nut sleeve 18 is in the opposite direction
  • the rotation drives the claw 10 to move axial
  • a first bearing 16 is provided between the end of the chuck core 11 away from the motor 3 and the chuck interface 15, and the other end of the chuck core 11 close to the motor 3 and the gearbox housing of the power tool 100
  • the outer ring of the first bearing 16 is fixedly installed with the chuck interface portion 15
  • the inner ring of the first bearing 16 is fixedly installed with the chuck core 11
  • the outer ring of the second bearing 17 is fixedly installed with the chuck core 11
  • the body 11 is fixedly installed, and the inner ring of the second bearing 17 is fixedly installed with the reduction box housing 41; at the same time, since the chuck core body 11 and the chuck housing 12 are relatively rotatably fixed, the first bearing 16 and the second The bearing 17 supports the collet core 11 together.
  • the power tool is equipped with the offset accessory 2 shown in FIG. 1.
  • the input shaft 20 of the accessory 2 extends parallel to the output shaft 22, and the axis of the output shaft 22 is closer to the main housing 5 relative to the axis of the input shaft 20.
  • the axis of the output shaft 22 is closer to the top surface of the main housing 5 relative to the axis of the chuck core 11;
  • the output shaft of the power tool is translated by connecting a bias attachment 2.
  • the working head can approach the workpiece to be processed without receiving the main housing.
  • the distance between the top surface of the body 5 and the axis of the output shaft interferes with the workpiece and cannot approach the workpiece to perform work.
  • the power tool equipped with the offset attachment 2 is compared with the power tool with only three-jaw chuck, because the final output shaft The position of the camera changes relative to the position of the fuselage, which improves accessibility.
  • the rotation speed output by the chuck core 11 can also be transmitted to the output shaft 22 after being decelerated, which has a deceleration effect.
  • functional attachments may also include attachments that convert rotational motion into other forms of motion, such as converting rotational motion into yaw motion, linear reciprocating motion, rotary reciprocating motion, and so on.
  • Figures 4 and 5 respectively show two different working modes of a power tool in another embodiment.
  • the mode conversion mechanism includes an operable locking member 19.
  • the mode conversion mechanism includes an operable locking member 19.
  • the power tool 100 is in the drilling mode, the chuck core 11 is not fixed, the nut sleeve 18 is not locked, and the power of the motor 3 is transmitted to the chuck core 11 through the output shaft, so that the chuck core
  • the rotation of the body 11 drives the jaw 10 to continuously output power in a fixed form; as shown in FIG.
  • the nut sleeve 18 is fixed by the locking member 19, and the power of the motor 3 is transmitted to the chuck through the output shaft
  • the core 11 drives the chuck core 11 and the claw 10 to rotate. Since the nut sleeve 18 does not rotate, the claw 10 moves forward and clamps the input shaft 20 while rotating, or the chuck core 10 rotates in the opposite direction to drive the claw 10 rotates in the opposite direction and moves backward to release the fixed input shaft 20; it is worth noting here that since the chuck housing 12 is fixed to the main housing 5, the chuck mode of the power tool 100 in this embodiment is automatic.
  • Step 1 tentatively insert the input shaft 20 into the receiving hole between the jaws 10 to determine whether the input shaft 20 can be clamped by the jaws 10, if yes, go to step 3; if not, continue to step 2;
  • Step 2 Separate the claws 10 from each other and stop the claws 10 when they can be inserted into the input shaft 20;
  • Step 3 Insert the input shaft 20 into the accommodating hole, and at the same time match the accessory interface portion 23 with the chuck interface portion 15;
  • Step 4 Bring the claws 10 closer to each other to clamp the input shaft 20.
  • the mode switching mechanism is operated to switch the power tool to the chuck mode, and the motor is rotated to drive the jaws to move to separate or mutually separate Move closer.
  • the switch of the power tool 100 is turned on. Because the protrusion 24 is combined with the recess 13, it cannot rotate relatively. At this time, the motor 3 of the power tool 100 transmits the rotational power to Reducer 4, chuck core 11, jaw 10, input shaft 20, accessory reducer 21, output shaft 22, so as to achieve the purpose of work; when the accessory 2 needs to be removed from the power tool 100, the operating power tool 100 is located In the chuck mode, the jaws 10 are separated from each other so that the input shaft 20 can be loosened, and then the power tool 100 is held by one hand, and the accessory 2 is held by the other hand.

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  • Mechanical Engineering (AREA)
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Abstract

提供了一种动力工具及其附件和安装方法。动力工具（100）包括：主壳体（5）；容纳在主壳体（5）内的马达（3）；夹头（1），包括夹头壳体（12）、设置于夹头壳体（12）内由马达轴驱动的夹头芯体（11）、以及设置于夹头芯体（11）上的若干卡爪（10），夹头壳体（12）相对主壳体（5）固定设置，夹头壳体（12）设置有夹头接口部（15）；附件（2），可拆卸地与夹头（1）配接，附件（2）包括附件壳体（25）和至少部分容纳在附件壳体（25）中的附件本体，附件壳体（25）设置有与夹头接口部（15）过盈配接的附件接口部（23），附件本体相对附件壳体（25）活动地设置，附件本体包括输入轴（20）和输出轴（22），当附件接口部（23）与夹头接口部（15）配接时，输入轴（20）能被若干卡爪（10）夹紧，从而能将马达（3）的旋转动力传递至输出轴（22）。通过改进的动力工具、附件以及安装方法，解决了动力工具与附件连接不方便、不稳定的问题。

Description

一种动力工具及其附件和动力工具的安装方法
本申请要求了申请日为2019年7月25日，申请号为201910678397.2的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及动力工具技术领域，特别涉及一种动力工具及其附件。
背景技术
如今，动力工具功能附件用途极其广泛，且种类繁多。当这些功能附件与动力工具结构之后，可应对不同的工况需求；例如为了提高工具的可接近性，可以在原来工具上附加一个偏心附件，使得该附件的输出轴至工件的距离比工具主轴至工件的距离更接近；例如为了提高输出轴的转速，可以附加一个增速机构附件，使得该附件的输出轴的转速比工具主轴的转速更高；例如为了减缓输出轴的转速，可以附加一个减速机构附件，使得该附件的输出轴的转速比工具主轴的转速低此类等等。
针对具有三爪夹头的动力工具而言，其工作头多通过夹头的三个卡爪夹持，例如钻头均由夹头的卡爪夹紧之后可进行打孔，例如批头，由夹头的卡爪夹紧之后可进行拧螺钉工作。而现有的夹头安装工作头后执行工作时，夹头的外壳体会跟随夹头芯体一起旋转运动。如果要在具有此类夹头的动力工具上再附加一个前述的功能附件，通常采用以下方式：方式一是将三爪夹头从动力工具上拆卸下来，再将该功能附件与动力工具主体配接；方式二是不需要将夹头从动力工具上拆卸，而是采用连接机构将附件与机身外壳相连接在一起，再将卡爪与附件的传动轴夹紧固接；方式三是直接将卡爪与附件的传动轴夹紧，以防止晃动，使用时用手扶持附件外壳来进行止转。
方式一中夹头的拆卸和安装都比较费时且操作麻烦；方式二的连接机构需要跨越夹头的距离后与主机壳连接，体积会比较庞大，不利于结构的小型化；方式三的操作方式，为防止晃动而用手去扶持，不仅不够人性化而且还存在安全隐患。
为解决现有技术中存在上述问题，有必要进行对上述功能附件以及动力工具进行改进。
发明内容
基于上述所述的技术问题，本发明提供一种改进的动力工具。
本发明提供了一种动力工具，其包括：
主壳体；
夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动旋转的夹头芯体、设置于夹头芯体上的若干卡爪，以及与所述若干卡爪螺纹连接的驱动件，所述若干卡爪相对芯体能 够在相互靠拢的位置与相互分开的位置间运动；所述夹头壳体相对所述主壳体固定设置，所述夹头壳体设置有夹头接口部；
附件，可拆卸地与所述夹头配接，所述附件包括附件壳体和至少部分容纳在所述附件壳体中的附件本体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部，所述附件本体相对附件壳体活动地设置，所述附件本体包括输入轴，以及与输入轴连接的输出轴，当所述附件接口部与所述夹头接口部配接时，所述输入轴能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴。
通过采用上述技术方案，夹头壳体不旋转，夹头接口部与附件接口部的过盈配接，免去了使用工具以及紧固件，使得附件的安装变得结构简单、操作方便，也有利于整机的小型化；通过夹爪来固定输入轴，保证了夹头芯体与附件本体的输出同轴度，从而传动稳定。
优选地，所述动力工具包括模式转换机构，所述模式转换机构可操作地使动力工具在夹盘模式与钻模式之间切换；当所述动力工具位于夹盘模式时，所述马达驱动所述夹头芯体与驱动件两者之一相对两者之另一个旋转，从而能够使所述若干夹爪相对夹体芯体运动至夹紧所述输入轴或者释放所述输入轴；当所述动力工具位于钻模式时，所述若干卡爪夹紧所述输入轴并能够为所述输出轴持续输出动力。
优选地，当所述动力工具位于夹盘模式时，所述夹头芯体可选择相对夹头壳体固定，所述马达驱动所述驱动件相对所述夹头芯体运动，从而驱动所述若干卡爪相对芯体在相互靠拢的位置与相互分开的位置间运动。
优选地，所述驱动件为设置于所述若干卡爪的外侧的螺母套。
通过采用上述技术方案，动力工具具有夹盘模式可更方便的来固定或解除固定附件；而动力工具的钻模式，保证了附件的稳定动力来源。
一种实施例中，所述附件接口部包括至少一个第一连接部，所述夹头接口部包括有与所述第一连接部对应的第二连接部，所述第一连接部和第二连接部其中一个设置成凸块，其中之另一个设置成与所述凸块配合的凹缺。
通过采用上述技术方案，凸块与凹缺的配合可以很方便的将附件连接到夹头壳体上，拆装方便，定位准确；当然，其他能起到连接和定位附件与夹头的结构，也属于本发明的保护范围，如卡扣，定位销等。
本发明还提供了一种附件，可拆卸地与动力工具的夹头配接，所述动力工具包括主壳体；容纳在主壳体内的马达；夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动的夹头芯体、以及设置于夹头芯体上的若干卡爪，以及与所述若干卡爪螺纹连接的驱动件，所述若干卡爪相对芯体能够在相互靠拢的位置与相互分开的位置间运动；所述夹头壳体相对所述 主壳体固定设置，所述夹头壳体设置有夹头接口部，所述附件包括：
附件壳体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部；
附件本体，所述附件本体相对附件壳体活动地设置，所述附件本体包括相互连接的输入轴和输出轴，所述输入轴用于当所述附件接口部与所述夹头接口部配接时能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴。
通过采用上述技术方案，附件连接操作方便，连接结构简单，更有利于整机的小型化。
优选地，所述附件本体还包括设置于输入轴与输出轴之间的传动机构，所述输入轴的运动通过所述传动机构传递至所述输出轴。
优选地，所述输入轴与输出轴平行设置。通过采用该技术方案，也可改变输出轴的位置，提高可接近性。
另一种可替换的实施例中，所述输入轴与输出轴在旋转时具有速度差。
再一种可替换的实施例中，所述传动机构设置成减速器。
通过采用上述技术方案，该附件可起到改变传动比的作用。
本发明还提供了一种动力工具的安装方法，所述动力工具包括主壳体；容纳在主壳体内的马达；夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动的夹头芯体、位于夹头芯体内的收容孔、以及设置于夹头芯体上围绕所述收容孔设置的若干卡爪，所述若干卡爪相对芯体能够在相互靠拢的位置与相互分开的位置间运动，所述夹头壳体相对所述主壳体固定设置，所述夹头壳体设置有夹头接口部；附件，所述附件包括附件壳体和相对附件壳体活动设置的附件本体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部，当所述附件接口部与所述夹头接口部配接时，所述输入轴能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴，其特征在于，所述安装方法包括如下步骤：步骤一：判断输入轴是否能够插入所述收容孔内，如是，转至步骤三；如否，继续步骤二；步骤二：使所述若干卡爪相互分开；步骤三：将输入轴插入所述收容孔内，同时将所述附件接口部与所述夹头接口部配接；步骤四：使所述若干卡爪相互靠拢以夹紧所述输入轴。
优选地，所述动力工具包括模式转换机构，所述模式转换机构可操作地使动力工具在夹盘模式与钻模式之间切换；当所述动力工具位于夹盘模式时，所述夹头芯体可选择相对夹头壳体固定，所述马达驱动所述驱动件相对夹头芯体旋转，从而能够使所述若干夹爪相对夹体芯体运动至夹紧所述输入轴或者释放所述输入轴；当所述动力工具位于钻模式时，所述若干卡爪夹紧所述输入轴并能够为所述输出轴持续输出动力；在使所述若干卡爪相互分开或者相互靠拢之前，设置所述动力工具至夹盘模式，再使马达旋转驱动卡爪运动。
与现有技术相比，本发明具有以下优点：
1)夹头外壳不旋转，夹头接口与附件接口之间过盈配合，附件连接操作方便，连接结构简单，更有利于整机的小型化；
2)该动力工具使用过程中无需手扶持，操作稳定；
3)夹头与附件采用通用化接口，动力工具夹头可适配多类附件，为拓宽了动力工具的应用场景提供了新的思路。
附图说明
图1为本发明的附件的立体示意图；
图2为本发明的动力工具的立体图；
图3为图2中动力工具配接了附件的剖视示意图；
图4为另一实施例的动力工具配接了附件在钻模式下的局部剖视示意图；
图5为图4的动力工具配接了附件在夹盘模式下的局部剖视示意图。
图中的相关元件对应编号如下：
100、动力工具，1、夹头，10、卡爪，11、夹头芯体，12、夹头壳体，13、凹缺，14、螺钉，15、夹头接口部，16、第一轴承，17、第二轴承，18、螺母套，19、锁定件，2、附件，20、输入轴，21、减速器，22、输出轴，23、附件接口部，24、凸块，25、附件壳体，3、马达，4、传动机构，41、减速箱壳体，5、主壳体。
具体实施方式
为了便于理解本发明，下面将参照相关附图对本发明进行更全面的描述。附图中给出了本发明的优选实施方式。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反的，提供这些实施方式的目的是为了对本发明的公开内容理解得更加透彻全面。
需要说明的是，当元件被称为“固定于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
如图1所示，为一种功能附件2，其用来连接动力工具100的夹头1，具体地，附件2设 置成一种偏置附件，附件2包括附件壳体25和至少部分容纳在附件壳体25中的附件本体，附件本体具体包括输入轴20、输出轴22，以及位于输入轴20与输出轴22之间的减速器21(图3所示)，附件壳体25上设置有附件接口部23，附件接口部23包括至少一个凸块24，当然也可以设置有若干凸块24，本实施例中，附件接口部23包括沿附件接口部周向设置四个凸块24，附件本体整体可相对附件壳体25做旋转运动，输入轴20的旋转运动经过减速器21传递至输出轴22，能达到降低传动比的目的。
如图2和3所示，为一种动力工具100，包括：主壳体5；容纳在主壳体5内的马达3，马达3具有马达轴；给马达3提供动力的动力源，此处的动力源为直流电源，采用锂电池包，锂电池包是本领域技术人员熟知的技术，不多加赘述；夹头1，夹头1由马达3的马达轴驱动，当然，马达3和夹头1之间还可以设置传动机构4，传动机构4通常设置成减速机构是本领域技术人员熟知的技术，在此就不多加以叙述。
具体的，夹头1包括夹头壳体12、夹头芯体11、位于夹头芯体11的收容孔、围绕收容孔设置的若干卡爪10、以及与卡爪10螺纹连接的驱动件；其中夹头芯体11由马达3的马达轴驱动，卡爪10具有三个，沿夹头芯体11周向分布；夹头壳体12与动力工具100的主壳体5相对固定；本实施例中主壳体5与夹头壳体12通过螺钉14安装固定；驱动件为设置于卡爪10的外侧的螺母套18，收容孔用于插入工作头或附件输入轴，卡爪10用于对工作头或输入轴进行夹紧。
夹头壳体12上设置有夹头接口部15，夹头接口部15包括至少一个凹缺13，本实施例中，夹头接口部15包括若干沿夹头接口部15周向设置的凹缺13。凹缺13与凸块24一一对应地过盈配合，防止在动力工具工作过程中附件2的掉落和松动，提高安全性。
当然本领域技术人员可以设想，凹缺13与凸块24的设置方式可以互换，即在夹头接口部15设置凸块24，而在附件接口部23设置凹缺13。动力工具100包括钻模式和卡盘模式，动力工具还包括模式转换机构(图中未示出)，模式转换机构可操作地使动力工具在夹盘模式与钻模式之间切换；当动力工具100位于钻模式时，夹头芯体11相对夹头壳体12可旋转，螺母套18随卡爪10和夹头芯体11一起旋转；马达3的动力通过输出轴传递至夹头芯体11，从而夹头芯体11和螺母套18共同旋转带动卡爪10以固定形态持续输出动力；当动力工具100位于夹盘模式时，夹头芯体11能够相对夹头壳体12固定，马达3的动力通过输出轴传递至螺母套18，从而带动螺母套18旋转，与螺母套18连接的卡爪10轴向移动，卡爪10通过轴向夹紧来固定输入轴20，或螺母套18反方向旋转带动卡爪10反方向轴向移动解除固定输入轴20；这里值得说明的是，本实施例中的夹盘是一种自动夹盘，即通过马达的动力驱动夹头的卡爪在相互靠拢的锁紧位置与相互分离的释放位置间移动。
如图3所示，夹头芯体11远离马达3的一端与夹头接口部15间设有第一轴承16，夹头芯体11靠近马达3的另一端与动力工具100的减速箱壳体41间设有第二轴承17；第一轴承16的设置可降低夹头芯体11与夹头接口部15间的磨损，第二轴承17的设置可以降低夹头芯体11与减速箱壳体41间的磨损，此时第一轴承16的外圈与夹头接口部15固定安装，第一轴承16的内圈与夹头芯体11固定安装，第二轴承17的外圈与夹头芯体11固定安装，第二轴承17的内圈与减速箱壳体41固定安装；同时，由于夹头芯体11与夹头壳体12可相对旋转的固定，因此，第一轴承16和第二轴承17共同支承了夹头芯体11。
动力工具配接了图1中示出的偏置附件2，本实施例中附件2的输入轴20与输出轴22平行延伸，输出轴22的轴线相对输入轴20的轴线更接近主壳体5的顶面；本实施例中，由于输入轴20与夹头芯体11的轴线共轴线，输出轴22的轴线相对于夹头芯体11的轴线更靠近主壳体5的顶面；相对于动力工具而言，通过配接一个偏置附件2，将动力工具的输出轴进行了平移。具体地，由于输出轴22的轴线接近工具主壳体5的顶面，当位于输出轴22自由端的收容部连接了工作头之后，工作头就能够与待加工的工件接近，不会受主壳体5顶面至输出轴轴线之间这一段的距离干涉而无法接近工件执行工作，配接了偏置附件2的动力工具相对于仅具有三爪夹头的动力工具而言，由于最终输出轴的位置相对机身位置产生变化，从而使得可接近性得到了提升。
本实施例中的偏置附件2由于采用于减速器21，还能够将由夹头芯体11输出的旋转速度经过减速后传递至输出轴22，起到了减速作用。
当然，本领域技术人员可以设想，将附件的偏置功能与减速功能可分别通过设置不同的附件来实现，在针对不同的工况需要时，可供工作人员根据需要选择安装不同的功能附件。另外，功能附件还可以包括将旋转运动进行转换成其它运动形式的附件，例如将旋转动转换成偏摆运动、线性往复运动、旋转往复运动等等。
图4和图5分别示出了另一种实施方式的动力工具的两种不同的工作模式，与前一实施例的不同之处在于夹盘模式下，螺母套被固定，夹头芯体相对螺母套旋转从而驱动卡爪在锁紧位置与释放位置间运动。具体地，模式转换机构包括一个可操作地锁定件19。如图4所示，当动力工具100位于钻模式时，夹头芯体11不被固定，螺母套18不被锁定，马达3的动力通过输出轴传递至夹头芯体11，从而夹头芯体11旋转带动卡爪10以固定形态持续输出动力；如图5所示，当动力工具100位于夹盘模式时，螺母套18被锁定件19固定，马达3的动力通过输出轴传递至夹头芯体11从而带动夹头芯体11和卡爪10旋转，由于螺母套18不旋转，卡爪10旋转的同时向前移动夹紧输入轴20，或夹头芯体10反方向旋转带动卡爪10反方向旋转向后移动来解除固定输入轴20；这里值得说明的是，由于夹头壳体12与主壳体5固定， 所以本实施例中的动力工具100夹盘模式是自动的。
一种实施例的动力工具的安装方法为：
步骤一：通过试探性的将输入轴20插入卡爪10间的收容孔内，来判断输入轴20是否能被卡爪10夹持，如是，转至步骤三；如否，继续步骤二；
步骤二：使卡爪10相互分开，使卡爪10释放至能够插入输入轴20时停止；
步骤三：将输入轴20插入所述收容孔内，同时将附件接口部23与夹头接口部15配接；。
步骤四：使卡爪10相互靠拢以夹紧输入轴20。
另一种实施例中，在使卡爪10相互分开或者相互靠拢之前，操作所述模式转换机构，使所述动力工具切换至夹盘模式，再使马达旋转驱动卡爪运动至相互分开或者相互靠拢。
具体地，当操作动力工具100使其位于钻模式时，打开动力工具100开关，由于凸块24与凹缺13结合，不能相对旋转，此时通过动力工具100的马达3将旋转动力依次传递到减速器4、夹头芯体11、卡爪10、输入轴20、附件减速器21、输出轴22，从而实现工作目的；当需要将附件2从动力工具100上拆卸时，操作动力工具100位于卡盘模式使卡爪10彼此分离以使其能将输入轴20松开，然后一手持动力工具100，一手持附件2，用力拉即可使其分离。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (12)

  1. 一种动力工具，其特征在于，包括：
    主壳体；
    容纳在主壳体内的马达；
    夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动旋转的夹头芯体、设置于夹头芯体上的若干卡爪，以及与所述若干卡爪螺纹连接的驱动件，所述若干卡爪相对芯体能够在相互靠拢的位置与相互分开的位置间运动；所述夹头壳体相对所述主壳体固定设置，所述夹头壳体设置有夹头接口部；
    附件，可拆卸地与所述夹头配接，所述附件包括附件壳体和至少部分容纳在所述附件壳体中的附件本体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部，所述附件本体相对附件壳体活动地设置，所述附件本体包括输入轴，以及与输入轴连接的输出轴，当所述附件接口部与所述夹头接口部配接时，所述输入轴能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴。
  2. 根据权利要求1所述的动力工具，其特征在于：所述动力工具包括模式转换机构，所述模式转换机构可操作地使动力工具在夹盘模式与钻模式之间切换；当所述动力工具位于夹盘模式时，所述马达驱动所述夹头芯体与驱动件两者之一相对两者之另一个旋转，从而能够使所述夹爪相对夹头芯体运动至夹紧所述输入轴或者释放所述输入轴；当所述动力工具位于钻模式时，所述卡爪夹紧所述输入轴并能够为所述输出轴持续输出动力。
  3. 根据权利要求2所述的动力工具，其特征在于：当所述动力工具位于夹盘模式时，所述夹头芯体可选择相对夹头壳体固定，所述马达驱动所述驱动件相对所述夹头芯体运动，从而驱动所述卡爪相对芯体在相互靠拢的位置与相互分开的位置间运动。
  4. 根据权利要求3所述的动力工具，其特征在于：所述驱动件为设置于所述若干卡爪的外侧的螺母套。
  5. 根据权利要求1所述的动力工具，其特征在于：所述附件接口部包括至少一个第一连接部，所述夹头接口部包括有与所述第一连接部对应的第二连接部，所述第一连接部和第二连接部其中一个设置成凸块，其中之另一个设置成与所述凸块配合的凹缺。
  6. 一种附件，可拆卸地与动力工具的夹头配接，所述动力工具包括主壳体；容纳在主壳体内的马达；夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动的夹头芯体、以及设置于夹头芯体上的若干卡爪，以及与所述若干卡爪螺纹连接的驱动件，所述若干卡爪相对芯体能够在相互靠拢的位置与相互分开的位置间运动；所述夹头壳体相对所述主壳体固定设置，所述夹头壳体设置有夹头接口部，其特征在于，所述附件包括：
    附件壳体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部；
    附件本体，所述附件本体相对附件壳体活动地设置，所述附件本体包括相互连接的输入轴和输出轴，所述输入轴用于当所述附件接口部与所述夹头接口部配接时能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴。
  7. 根据权利要求6所述的附件，其特征在于：所述附件本体还包括设置于输入轴与输出轴之间的传动机构，所述输入轴的运动通过所述传动机构传递至所述输出轴。
  8. 根据权利要求7所述的附件，其特征在于：所述输入轴与输出轴平行设置。
  9. 根据权利要求7所述的附件，其特征在于：所述输入轴与输出轴在旋转时具有速度差。
  10. 根据权利要求7所述的附件，其特征在于：所述传动机构设置成减速器。
  11. 一种动力工具的安装方法，所述动力工具包括主壳体；容纳在主壳体内的马达；夹头，包括夹头壳体、设置于所述夹头壳体内由所述马达驱动的夹头芯体、位于夹头芯体内的收容孔、以及设置于夹头芯体上围绕所述收容孔设置的若干卡爪，所述若干卡爪相对芯体能够在相互靠拢的位置与相互分开的位置间运动，所述夹头壳体相对所述主壳体固定设置，所述夹头壳体设置有夹头接口部；附件，所述附件包括附件壳体和相对附件壳体活动设置的附件本体，所述附件壳体设置有用于与所述夹头接口部过盈配接的附件接口部，当所述附件接口部与所述夹头接口部配接时，所述输入轴能被所述若干卡爪夹紧，从而能够将所述马达的动力通过输入轴传递至输出轴，其特征在于，所述安装方法包括如下步骤：
    步骤一：判断输入轴是否能够插入所述收容孔内，如是，转至步骤三；如否，继续步骤二；
    步骤二：使所述若干卡爪相互分开；
    步骤三：将输入轴插入所述收容孔内，同时将所述附件接口部与所述夹头接口部配接；
    步骤四：使所述若干卡爪相互靠拢以夹紧所述输入轴。
  12. 根据权利要求11所述的动力工具的安装方法，所述动力工具包括模式转换机构，所述模式转换机构可操作地使动力工具在夹盘模式与钻模式之间切换；当所述动力工具位于夹盘模式时，所述夹头芯体可选择相对夹头壳体固定，所述马达驱动所述驱动件相对夹头芯体旋转，从而能够使所述若干夹爪相对夹体芯体运动至夹紧所述输入轴或者释放所述输入轴；当所述动力工具位于钻模式时，所述若干卡爪夹紧所述输入轴并能够为所述输出轴持续输出动力；其特征在于：在使所述若干卡爪相互分开或者相互靠拢之前，设置所述动力工具至夹盘模式，再使马达旋转驱动卡爪运动。
PCT/CN2019/118755 2019-07-25 2019-11-15 一种动力工具及其附件和动力工具的安装方法 WO2021012531A1 (zh)

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US4797040A (en) * 1987-02-02 1989-01-10 H-Tech, Inc. Strap on drill paraphernalia holding system (DPHS)
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