WO2023005456A1 - 套筒组件及电动工具 - Google Patents

套筒组件及电动工具 Download PDF

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Publication number
WO2023005456A1
WO2023005456A1 PCT/CN2022/098286 CN2022098286W WO2023005456A1 WO 2023005456 A1 WO2023005456 A1 WO 2023005456A1 CN 2022098286 W CN2022098286 W CN 2022098286W WO 2023005456 A1 WO2023005456 A1 WO 2023005456A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
nut
pull rod
sleeve assembly
bolt
Prior art date
Application number
PCT/CN2022/098286
Other languages
English (en)
French (fr)
Inventor
彭小湖
吴志刚
Original Assignee
江苏东成工具科技有限公司
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 江苏东成工具科技有限公司 filed Critical 江苏东成工具科技有限公司
Priority to US18/090,477 priority Critical patent/US20230158643A1/en
Publication of WO2023005456A1 publication Critical patent/WO2023005456A1/zh

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Classifications

    • 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
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
    • 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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • 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
    • B25B21/007—Attachments for drilling apparatus for screw or nut setting or loosening
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0085—Counterholding devices
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/12—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using magnetic means

Definitions

  • the invention relates to the field of tool tooling technology, in particular to an easy-to-operate socket assembly and an electric tool.
  • An electric wrench is a wrench powered by a power supply or a battery, and is a tool for tightening bolts. Mainly divided into impact wrench, torsional shear wrench, constant torque wrench, angle wrench, angle wrench, hydraulic wrench, torque wrench and rechargeable electric wrench.
  • the electric wrench with socket is a tool that is often used in people's daily work and life. It is indispensable whether it is in ordinary mechanical maintenance or in the process of building construction and installation.
  • the existing electric wrench drives the nut through the sleeve to tighten the nut and the bolt; but when the nut is just screwed into the bolt, the bolt will often rotate with the nut, and at this time, it is necessary to manually pre-tighten the bolt through additional tooling. Then the nuts and bolts can be tightened normally.
  • the setting of the extra tooling makes the operation inconvenient, and also increases a pre-tightening process, seriously affecting the work efficiency.
  • the object of the present invention is to provide a socket assembly and an electric tool.
  • the socket assembly ensures that the electric tool can realize the tightening of nuts and bolts without additional tooling to fix the bolts.
  • a sleeve assembly for screwing the nut to the bolt on the workpiece to be fixed
  • the sleeve assembly includes an axially extending sleeve and a The front end of the sleeve faces a recessed accommodation chamber, and the nut is accommodated in the accommodation chamber.
  • the sleeve assembly also includes a pull rod assembly located in the accommodating cavity, the pull rod assembly includes a pull rod extending axially, a magnetic element at the front end of the pull rod and a bearing at the rear end of the pull rod, and the pull rod passes through The bearing is connected to the inner wall of the sleeve, and the pull rod rotates relative to the sleeve.
  • a further improvement solution is: the diameter of the pull rod assembly is smaller than the inner diameter of the nut.
  • the magnetic element includes a magnetic steel arranged on the front end of the pull rod and a protective sleeve sleeved on the outside of the magnetic steel, the protective sleeve extends backward from the front end of the magnetic steel and covers It is arranged on the outer periphery of the pull rod.
  • a further improvement solution is: the outer periphery of the nut is in the shape of a regular polygonal prism, and the shape of the accommodating cavity corresponds to the shape of the outer periphery of the nut and is in the shape of a regular polygonal prism.
  • a further improvement solution is: when the nut is accommodated in the accommodating cavity, the nut is attracted by the magnetic element to move to the outer periphery of the magnetic element.
  • the workpieces to be fixed are two workpieces that are close together and to be fixed, and the bolts are provided with nuts on one side of the workpieces to be fixed and extend from the nuts and pass through to
  • the screw rod on the other side of the workpiece to be fixed when the nut is screwed by the sleeve assembly, the screw rod extends into the accommodating cavity, the magnetic element absorbs the end of the screw rod and the sleeve assembly Applying an active force away from the workpiece to be fixed to the screw.
  • an electric tool including a housing, a motor located in the housing, a transmission mechanism connected to the motor, and an output shaft driven by the transmission mechanism, The output shaft part is exposed at the front end of the housing.
  • the electric tool also includes the sleeve assembly as described in any one of the above, the sleeve is provided with a connection channel recessed from the rear end face forward, the output shaft extends into the connection channel, so that the A socket assembly is fixedly connected to the front end of the power tool.
  • the sleeve is provided with a through hole radially penetrating through the sleeve from the peripheral surface of the rear end, the through hole communicates with the connecting channel, and the sleeve assembly includes a A pin corresponding to the hole, when the front end of the output shaft is located in the connecting channel, the pin is inserted into the through hole and passes through the output shaft.
  • the sleeve is also provided with an annular groove inwardly recessed from the peripheral surface of the rear end, the through hole extends inward from the groove and communicates with the connecting channel, the sleeve assembly It includes a rubber ring engaged in the groove, and when the front end of the output shaft is located in the connecting channel, the inner ring of the rubber ring abuts against the two ends of the pin.
  • a further improvement solution is: the electric tool is an electric wrench, and the output shaft is a wrench head at least partially exposed from the front end of the housing.
  • the pull rod assembly includes a pull rod extending axially, a magnetic element at the front end of the pull rod and a bearing at the rear end of the pull rod, and the pull rod is connected to the inner wall of the sleeve through the bearing , so that the pull rod and the sleeve rotate relatively.
  • the magnetic element absorbs the bolt and the sleeve assembly applies a force to the bolt, so that the bolt abuts against the surface of the workpiece to be fixed, thereby generating friction, the Friction prevents the bolt from rotating with the nut, ie said bolt cannot move relative to the workpiece to be fixed. Therefore, the setting of the sleeve assembly ensures that the electric tool can realize the tightening of the nut and the bolt without additional tooling to fix the bolt, the operation is simple and convenient, the work efficiency is improved, and the operation difficulty is reduced.
  • Fig. 1 is a three-dimensional schematic diagram of an electric tool according to a preferred embodiment of the present invention
  • Fig. 2 is a sectional view of the power tool shown in Fig. 1;
  • Fig. 3 is a three-dimensional schematic diagram of a sleeve assembly in the electric tool shown in Fig. 1;
  • Fig. 4 is an exploded schematic diagram of the sleeve assembly shown in Fig. 3;
  • Fig. 5 is a schematic perspective view of the power tool shown in Fig. 1 when it is in use;
  • Fig. 6 is a cross-sectional view of the power tool shown in Fig. 5 when it is in use;
  • Fig. 7 is a partially enlarged view of the power tool shown in Fig. 6 when it is in use.
  • Sleeve assembly 10 sleeve 11, accommodation cavity 12, connecting channel 13, groove 14, through hole 15, pin 16, rubber ring 20, pull rod assembly 21, pull rod 22, magnetic element 23, bearing 24, magnet Steel 25, protective cover 200, electric tool 210, shell 211, main body 212, grip 213, operation button 220, motor 230, transmission mechanism 240, output shaft 250, battery pack 300, workpiece to be fixed 310, nut 320 , bolt 321, nut 322, screw
  • the electric tool 200 is an electric wrench, which includes a housing 210, a motor 220 located in the housing 210, The transmission mechanism 230 connected to the motor 220 , the output shaft 240 driven by the transmission mechanism 230 and the sleeve assembly 100 connected to the front end of the output shaft 240 , the output shaft 240 is partially exposed at the front end of the housing 210 .
  • the output shaft 240 is a wrench head at least partially exposed from the front end of the housing 210 , and the motor 220 drives the output shaft 240 through the transmission mechanism 230 to drive the sleeve assembly 100 to run.
  • the housing 210 includes a main body 211 extending in the axial direction and a handle 212 connected below the main body 211 .
  • the motor 220 , the transmission assembly 230 and the output shaft 240 are all accommodated in the main body 211 .
  • the grip portion 212 is used for gripping by the user during operation and is provided with an operation button 213 for the user to operate to control the power tool 200 to start and stop.
  • the electric tool 200 further includes a battery pack 250 connected to the lower end of the grip portion 212 , and the battery pack 250 is used to supply power to the electric tool 200 .
  • the sleeve assembly 100 includes an axially extending sleeve 10 and a tie rod assembly 20 inside the sleeve 10 .
  • the sleeve 10 is provided with an accommodating chamber 11 recessed from the front end face backward and a connecting channel 12 recessed forward from the rear end face, and the nut 310 is accommodated in the accommodating chamber 11 .
  • the output shaft 240 extends into the connecting channel 12 so that the sleeve assembly 100 is fixedly connected to the front end of the power tool 200 , and then the motor 220 drives the sleeve assembly 100 to run through the output shaft 240 .
  • the sleeve 10 is provided with an annular groove 13 recessed inward from the circumferential surface of the rear end and a through hole 14 radially penetrating the sleeve 10 from the circumferential surface of the rear end, and the through hole 14 is recessed from the circumferential surface of the rear end.
  • the groove 13 extends inward and communicates with the connecting channel 12 .
  • the sleeve assembly 100 also includes a pin 15 corresponding to the through hole 14 and a rubber ring 16 engaged in the groove 13.
  • the pull rod assembly 20 is located in the receiving chamber 11 and includes a pull rod 21 extending axially, a magnetic element 22 at a front end of the pull rod 21 , and a bearing 23 at a rear end of the pull rod 21 .
  • the pull rod 21 is connected to the inner wall of the sleeve 10 through a bearing 23, so that the pull rod 21 is axially fixed to the sleeve 10 while relatively rotating;
  • the magnetic element 22 includes a magnetic steel 24 arranged on the front end of the pull rod 21
  • the protective sleeve 25 sleeved on the outside of the magnetic steel 24, the protective sleeve 25 extends backward from the front end of the magnetic steel 24 and is sleeved on the outer periphery of the pull rod 21, so that the magnetic steel 24 is stably connected to the pull rod 21 .
  • the sleeve assembly 100 of the present invention is used to screw the nut 310 to the bolt 320 on the workpiece 300 to be fixed.
  • the workpiece 300 to be fixed is two workpieces that are close together and to be fixed.
  • the bolt 320 is provided with a nut 321 located on one side of the workpiece 300 to be fixed and extends from the nut 321 and penetrates to the workpiece 300 to be fixed.
  • the screw rod 322 on the other side, the electric tool 200 is disposed on the other side of the workpiece 300 to be fixed through the sleeve assembly 200 receiving the nut 310 .
  • the outer periphery of the nut 310 is a regular polygonal prism, and the shape of the accommodation cavity 11 corresponds to the shape of the outer periphery of the nut 310 , that is, the accommodation cavity 11 is a regular polygonal prism for accommodating the nut 310 .
  • the diameter of the pull rod assembly 20 is smaller than the inner diameter of the nut 310 , so that when the nut 310 is accommodated in the cavity 11 , the nut 310 is attracted by the magnetic element 22 to move to the outer periphery of the magnetic element 22 .
  • the magnetic element 22 absorbs the bolt 320 and the sleeve assembly 100 applies a force to the bolt 320, so that the bolt 320 is attached to the workpiece 300 to be fixed.
  • the surface cannot move relative to the workpiece 300 to be fixed.
  • the screw rod 322 when the nut 310 is screwed by the sleeve assembly 100, the screw rod 322 extends into the accommodating chamber 11, the magnetic steel 24 of the magnetic element 22 absorbs the end of the screw rod 322, and the sleeve assembly 100
  • the screw 322 exerts an active force away from the workpiece 300 to be fixed, so that the nut 321 abuts against the surface of the workpiece 300 to be fixed, thereby generating frictional force, which can prevent the bolt 320 from rotating with the nut 310, that is, the The bolt 320 cannot move relative to the workpiece 300 to be fixed, so that the nut 310 and the bolt 320 can be tightened.
  • the pull rod assembly 20 includes a pull rod 21 extending axially, a magnetic element 22 positioned at the front end of the pull rod 21 and a bearing 23 positioned at the rear end of the pull rod 21, the pull rod 21 is connected to the inner wall of the sleeve 10 through the bearing 23, In order to make the pull rod 21 and the sleeve 10 have relative rotation.
  • the magnetic element 22 absorbs the bolt 320 and the sleeve assembly 100 applies a force to the bolt 320, so that the bolt 320 is attached to the workpiece 300 to be fixed.
  • the setting of the sleeve assembly 100 ensures that the electric tool 200 can realize the tightening of the nut 310 and the bolt 320 without additional tooling to fix the bolt 320 , the operation is simple and convenient, the work efficiency is improved, and the operation difficulty is reduced.

Abstract

一种套筒组件（100）及电动工具（200），套筒组件（100）用于将螺母（310）旋拧至位于待固定工件（300）上的螺栓（320）且包括套筒（10）及自套筒（10）的前端面向后凹陷的容纳腔（11），螺母（310）收容于容纳腔（11）内。套筒组件（100）还包括位于容纳腔（11）内的拉杆组件（20），拉杆组件（20）包括沿轴向延伸的拉杆（21）、位于拉杆（21）前端的磁性元件（22）及位于拉杆（21）后端的轴承（23），拉杆（21）通过轴承（23）连接于套筒（10）的内壁，以使拉杆（21）与套筒（10）相对转动。套筒组件（100）旋拧螺母（310）时，磁性元件（22）吸附住螺栓（320）且套筒组件（100）向螺栓（320）施加一作用力，以使螺栓（320）贴靠于待固定工件（300）的表面，即螺栓（320）无法相对于待固定工件（300）运动。

Description

套筒组件及电动工具 [技术领域]
本发明涉及工具工装技术领域，特别涉及一种操作简便的套筒组件及电动工具。
[背景技术]
电动扳手就是以电源或电池为动力的扳手，是一种拧紧螺栓的工具。主要分为冲击扳手、扭剪扳手、定扭矩扳手、转角扳手、角向扳手、液压扳手、扭力扳手及充电式电动扳手。带套筒的电动扳手是人们日常工作生活中经常使用的工具，无论是在普通的机械维修还是在建筑建设安装过程中都是必不可少的。现有的电动扳手通过套筒驱动螺母，以将螺母和螺栓拧紧；但是螺母刚拧入螺栓时，螺栓往往会跟随螺母一同旋转，此时就需要人工通过额外的工装对螺栓进行预紧固定，而后才能正常进行螺母和螺栓的拧紧。该额外工装的设置使得操作变得不方便，同时还会因此增加一个预紧工序，严重的影响了工作效率。
鉴于此，确有必要提供一种改进的套筒组件及电动工具，以克服先前技术存在的缺陷。
[发明内容]
针对现有技术的不足，本发明的目的在于提供一种套筒组件及电动工具，该套筒组件保证了电动工具无需额外工装固定螺栓，即可实现螺母与螺栓的拧紧。
本发明解决现有技术问题所采用的技术方案是：一种套筒组件，用于将螺母旋拧至位于待固定工件上的螺栓，所述套筒组件包括轴向延伸的套筒及自所述套筒的前端面向后凹陷的容纳腔，所述螺母收容于所述容纳腔内。所述套筒 组件还包括位于所述容纳腔内的拉杆组件，所述拉杆组件包括沿轴向延伸的拉杆、位于所述拉杆前端的磁性元件及位于所述拉杆后端的轴承，所述拉杆通过所述轴承连接于所述套筒的内壁，且所述拉杆与所述套筒相对转动。所述套筒组件旋拧所述螺母时，所述磁性元件吸附住所述螺栓且所述套筒组件向所述螺栓施加一作用力，以使所述螺栓贴靠于所述待固定工件的表面。
进一步改进方案为：所述拉杆组件的直径小于所述螺母的内径。
进一步改进方案为：所述磁性元件包括设置于所述拉杆的前端面的磁钢及套设于所述磁钢外侧的保护套，所述保护套自所述磁钢的前端向后延伸且套设于所述拉杆的外周。
进一步改进方案为：所述螺母的外周呈正多棱柱型，所述容纳腔的形状对应于所述螺母的外周的形状且呈正多棱柱型。
进一步改进方案为：所述螺母收容于所述容纳腔时，所述螺母被所述磁性元件吸引以运动至所述磁性元件的外周。
进一步改进方案为：所述待固定工件为贴靠在一起且待固定的两个工件，所述螺栓设有位于所述待固定工件一侧的螺帽及自所述螺帽延伸且穿设至所述待固定工件另一侧的螺杆，所述套筒组件旋拧所述螺母时，所述螺杆延伸入所述容纳腔内，所述磁性元件吸附住所述螺杆的末端且所述套筒组件向所述螺杆施加一个远离所述待固定工件的作用力。
本发明解决现有技术问题所采用的技术方案是：一种电动工具，包括壳体、位于所述壳体内的电机、连接于所述电机的传动机构及由所述传动机构驱动的输出轴，所述输出轴部分露出于所述壳体的前端。所述电动工具还包括如上述任一项所述的套筒组件，所述套筒设有自后端面向前凹陷的连接通道，所述输出轴延伸入所述连接通道内，以使所述套筒组件固定连接至所述电动工具的前 端。
进一步改进方案为：所述套筒设有自后端的周向表面沿径向贯穿所述套筒的通孔，所述通孔连通于所述连接通道，所述套筒组件包括与所述通孔对应的销柱，所述输出轴的前端位于所述连接通道内时，所述销柱插设于所述通孔内且贯穿所述输出轴。
进一步改进方案为：所述套筒还设有自后端的周向表面向内凹陷的环形凹槽，所述通孔自所述凹槽向内延伸且连通所述连接通道，所述套筒组件包括卡合于所述凹槽内的橡胶圈，所述输出轴的前端位于所述连接通道内时，所述橡胶圈的内圈抵接于所述销柱的两端。
进一步改进方案为：所述电动工具为一电动扳手，所述输出轴为至少部分露出所述壳体前端的扳手头。
与现有技术相比，本发明具有如下有益效果：所述拉杆组件包括沿轴向延伸的拉杆、位于拉杆前端的磁性元件及位于拉杆后端的轴承，所述拉杆通过轴承连接于套筒的内壁，以使所述拉杆与套筒相对转动。所述套筒组件旋拧螺母时，所述磁性元件吸附住螺栓且所述套筒组件向螺栓施加一作用力，以使所述螺栓贴靠于待固定工件的表面，从而产生摩擦力，该摩擦力可以防止螺栓跟随螺母旋转，即所述螺栓无法相对于待固定工件运动。是以该套筒组件的设置保证了电动工具无需额外工装固定螺栓，即可实现螺母与螺栓的拧紧，操作简单方便，提高了工作效率，减小操作难度。
[附图说明]
下面结合附图对本发明的具体实施方式做进一步详细的说明:
图1是本发明较佳实施例的电动工具的立体示意图；
图2是图1所示的电动工具的剖视图；
图3是图1所示的电动工具中套筒组件的立体示意图；
图4是图3所示的套筒组件的分解示意图；
图5是图1所示的电动工具处于使用状态时的立体示意图；
图6是图5所示的电动工具处于使用状态时的剖视图；
图7是图6所示的电动工具处于使用状态时的局部放大图。
图中附图标记的含义：
100、套筒组件 10、套筒 11、容纳腔 12、连接通道 13、凹槽 14、通孔 15、销柱 16、橡胶圈 20、拉杆组件 21、拉杆 22、磁性元件 23、轴承 24、磁钢 25、保护套 200、电动工具 210、壳体 211、主体部 212、握持部 213、操作按钮 220、电机 230、传动机构 240、输出轴 250、电池包 300、待固定工件 310、螺母 320、螺栓 321、螺帽 322、螺杆
[具体实施方式]
在本发明中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。例如下述的“上”、“下”、“前”、“后”等指示方位或位置关系的词语仅基于附图所示的方位或位置关系，仅为了便于描述本发明和简化描述，而不是指示或暗示所指的装置/元件必须具有特定的方位或以特定的方位构造和操作，因此不能理解为对本发明的限制。
请参阅图1至图2所示为本发明涉及的一种电动工具200，在本实施方式中，所述电动工具200为电动扳手，其包括壳体210、位于壳体210内的电机220、连接于电机220的传动机构230、由传动机构230驱动的输出轴240及连接于输出轴240前端的套筒组件100，所述输出轴240部分露出于壳体210的前端。所述输出轴240为至少部分露出壳体210前端的扳手头，且所述电机220通过传动机构230驱动输出轴240带动套筒组件100运转。
所述壳体210包括沿轴向延伸的主体部211及连接于主体部211下方的握持部212，所述电机220、传动组件230与输出轴240均容纳于主体部211内。所述握持部212用于使用者操作时的握持且设有操作按钮213，所述操作按钮213供使用者操作以控制电动工具200的工作启停。所述电动工具200还包括连接于握持部212下端的电池包250，所述电池包250用于对电动工具200进行电力供应。
结合图3至图4所示，所述套筒组件100包括轴向延伸的套筒10及位于套筒10内的拉杆组件20。所述套筒10设有自前端面向后凹陷的容纳腔11及自后端面向前凹陷的连接通道12，所述螺母310收容于容纳腔11内。所述输出轴240延伸入连接通道12内，以使所述套筒组件100固定连接至电动工具200的前端，进而使得所述电机220通过输出轴240带动套筒组件100运转。
具体的，所述套筒10设有自后端的周向表面向内凹陷的环形凹槽13及自后端的周向表面沿径向贯穿套筒10的通孔14，所述通孔14自凹槽13向内延伸且连通于连接通道12。所述套筒组件100还包括与通孔14对应的销柱15及卡合于凹槽13内的橡胶圈16，当所述输出轴240的前端位于连接通道12内时，所述销柱15插设于通孔14内且贯穿输出轴240，且所述橡胶圈16的内圈抵接于销柱15的两端，从而保证了所述套筒组件100稳定的固定连接至电动工具200的前端。
所述拉杆组件20位于容纳腔11内且包括沿轴向延伸的拉杆21、位于拉杆21前端的磁性元件22及位于拉杆21后端的轴承23。所述拉杆21通过轴承23连接于套筒10的内壁，以使所述拉杆21轴向固定于套筒10的同时相对转动；所述磁性元件22包括设置于拉杆21的前端面的磁钢24及套设于磁钢24外侧的保护套25，所述保护套25自磁钢24的前端向后延伸且套设于拉杆21的外周， 以使所述磁钢24稳定的连接于拉杆21上。
请参阅图5至图7所示，本发明的所述套筒组件100是用于将螺母310旋拧至位于待固定工件300上的螺栓320。所述待固定工件300为贴靠在一起且待固定的两个工件，所述螺栓320设有位于待固定工件300一侧的螺帽321及自螺帽321延伸且穿设至待固定工件300另一侧的螺杆322，所述电动工具200通过套筒组件200收容螺母310而设置于待固定工件300的另一侧。
所述螺母310的外周呈正多棱柱型，所述容纳腔11的形状对应于螺母310的外周的形状，即所述容纳腔11呈正多棱柱型以收容螺母310。所述拉杆组件20的直径小于螺母310的内径，使得所述螺母310收容于容纳腔11时，所述螺母310被磁性元件22吸引以运动至磁性元件22的外周。
所述套筒组件100旋拧螺母310时，所述磁性元件22吸附住螺栓320且所述套筒组件100向螺栓320施加一作用力，以使所述螺栓320贴靠于待固定工件300的表面而无法相对于待固定工件300运动。具体的，所述套筒组件100旋拧螺母310时，所述螺杆322延伸入容纳腔11内，所述磁性元件22的磁钢24吸附住螺杆322的末端，且所述套筒组件100向螺杆322施加一个远离待固定工件300的作用力，以使所述螺帽321贴靠于待固定工件300的表面，从而产生摩擦力，该摩擦力可以防止螺栓320跟随螺母310旋转，即所述螺栓320无法相对于待固定工件300运动，从而实现螺母310与螺栓320的拧紧。
本发明中，所述拉杆组件20包括沿轴向延伸的拉杆21、位于拉杆21前端的磁性元件22及位于拉杆21后端的轴承23，所述拉杆21通过轴承23连接于套筒10的内壁，以使所述拉杆21与套筒10具有相对转动。所述套筒组件100旋拧螺母310时，所述磁性元件22吸附住螺栓320且所述套筒组件100向螺栓320施加一作用力，以使所述螺栓320贴靠于待固定工件300的表面，从而产生 摩擦力，该摩擦力可以防止螺栓320跟随螺母310旋转，即所述螺栓320无法相对于待固定工件300运动。是以该套筒组件100的设置保证了电动工具200无需额外工装固定螺栓320，即可实现螺母310与螺栓320的拧紧，操作简单方便，提高了工作效率，减小操作难度。
本发明不局限于上述具体实施方式。本领域普通技术人员可以很容易地理解到，在不脱离本发明原理和范畴的前提下，本发明的套筒组件及电动工具还有很多的替代方案。本发明的保护范围以权利要求书的内容为准。

Claims (10)

  1. 一种套筒组件，用于将螺母旋拧至位于待固定工件上的螺栓，所述套筒组件包括轴向延伸的套筒及自所述套筒的前端面向后凹陷的容纳腔，所述螺母收容于所述容纳腔内；其特征在于：所述套筒组件还包括位于所述容纳腔内的拉杆组件，所述拉杆组件包括沿轴向延伸的拉杆、位于所述拉杆前端的磁性元件及位于所述拉杆后端的轴承，所述拉杆通过所述轴承连接于所述套筒的内壁，且所述拉杆与所述套筒相对转动，所述套筒组件旋拧所述螺母时，所述磁性元件吸附住所述螺栓且所述套筒组件向所述螺栓施加一作用力，以使所述螺栓贴靠于所述待固定工件的表面。
  2. 根据权利要求1所述的套筒组件，其特征在于：所述拉杆组件的直径小于所述螺母的内径。
  3. 根据权利要求2所述的套筒组件，其特征在于：所述磁性元件包括设置于所述拉杆的前端面的磁钢及套设于所述磁钢外侧的保护套，所述保护套自所述磁钢的前端向后延伸且套设于所述拉杆的外周。
  4. 根据权利要求2所述的套筒组件，其特征在于：所述螺母的外周呈正多棱柱型，所述容纳腔的形状对应于所述螺母的外周的形状且呈正多棱柱型。
  5. 根据权利要求4所述的套筒组件，其特征在于：所述螺母收容于所述容纳腔时，所述螺母被所述磁性元件吸引以运动至所述磁性元件的外周。
  6. 根据权利要求1所述的套筒组件，其特征在于：所述待固定工件为贴靠在一起且待固定的两个工件，所述螺栓设有位于所述待固定工件一侧的螺帽及自所述螺帽延伸且穿设至所述待固定工件另一侧的螺杆，所述套筒组件旋拧所述螺母时，所述螺杆延伸入所述容纳腔内，所述磁性元件吸附住所述螺杆的末端且所述套筒组件向所述螺杆施加一个远离所述待固定工件的作用力。
  7. 一种电动工具，包括壳体、位于所述壳体内的电机、连接于所述电机的传动机构及由所述传动机构驱动的输出轴，所述输出轴部分露出于所述壳体的前端；其特征在于：所述电动工具还包括如上述权利要求1至6任一项所述的套筒组件，所述套筒设有自后端面向前凹陷的连接通道，所述输出轴延伸入所述连接通道内，以使所述套筒组件固定连接至所述电动工具的前端。
  8. 根据权利要求7所述的电动工具，其特征在于：所述套筒设有自后端的周向表面沿径向贯穿所述套筒的通孔，所述通孔连通于所述连接通道，所述套筒组件包括与所述通孔对应的销柱，所述输出轴的前端位于所述连接通道内时，所述销柱插设于所述通孔内且贯穿所述输出轴。
  9. 根据权利要求8所述的电动工具，其特征在于：所述套筒还设有自后端的周向表面向内凹陷的环形凹槽，所述通孔自所述凹槽向内延伸且连通所述连接通道，所述套筒组件包括卡合于所述凹槽内的橡胶圈，所述输出轴的前端位于所述连接通道内时，所述橡胶圈的内圈抵接于所述销柱的两端。
  10. 根据权利要求7所述的电动工具，其特征在于：所述电动工具为一电动扳手，所述输出轴为至少部分露出所述壳体前端的扳手头。
PCT/CN2022/098286 2021-07-28 2022-06-11 套筒组件及电动工具 WO2023005456A1 (zh)

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