WO2018121722A1 - 起子机 - Google Patents

起子机 Download PDF

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Publication number
WO2018121722A1
WO2018121722A1 PCT/CN2017/119759 CN2017119759W WO2018121722A1 WO 2018121722 A1 WO2018121722 A1 WO 2018121722A1 CN 2017119759 W CN2017119759 W CN 2017119759W WO 2018121722 A1 WO2018121722 A1 WO 2018121722A1
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WO
WIPO (PCT)
Prior art keywords
housing
circuit board
screwdriver
gear set
reduction gear
Prior art date
Application number
PCT/CN2017/119759
Other languages
English (en)
French (fr)
Inventor
陈锋
周若冰
Original Assignee
博世电动工具（中国）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 博世电动工具（中国）有限公司 filed Critical 博世电动工具（中国）有限公司
Priority to DE112017006677.8T priority Critical patent/DE112017006677T5/de
Publication of WO2018121722A1 publication Critical patent/WO2018121722A1/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
    • 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

Definitions

  • the present application relates to power tools, and more particularly to a screwdriver.
  • Electric screwdrivers are a basic power tool commonly used.
  • the design of more complex and larger-sized circuit boards, combined with the structural limitations of the axial superposition of many components, has been designed for the miniaturization of power tools. Come to the challenge.
  • the layout and actuation design of the parts are becoming more and more complicated.
  • the industry is also striving to find and try to press the starter and other mechanical design that conforms to the traditional tool operation habits and behavior feedback.
  • the main problem to be solved in this application is the compactness and convenience of the screwdriver.
  • the present application provides a screwdriver including a housing and a battery housed in the housing, a circuit board, and an actuator driven by the battery and the circuit board, the actuator including a motor and a deceleration a gear set and an output shaft at a front end of the driver and driven by the reduction gear set, the actuator is resiliently preset and can move relative to the housing when pressurized, the screwdriver further A switch is involved that participates in the working circuit that makes up the starter and that can be triggered during the relative motion.
  • the actuator is elastically preset and can trigger the design of the working circuit of the driver when pressed, and the design assembly and the pressure starting function can be quickly realized, which is more compact and miniaturized.
  • Figure 1 is a perspective view showing the structure of the screwdriver of the present application.
  • Figure 2 is a cross-sectional view showing the structure of the screwdriver of Figure 1 taken along the A-A direction;
  • FIG. 3 is a schematic exploded view showing the screwdriver of the present application in a cross-sectional view of FIG. 2;
  • Figure 4 is a schematic exploded view showing the screwdriver of Figure 1;
  • Figure 5 is a schematic exploded view showing the cage assembly and the housing of Figure 4 before assembly;
  • Figure 6 is a schematic exploded view showing the angle of the screwdriver of Figure 1 at another angle;
  • Fig. 7 is a schematic view showing the principle of the pressing start function in the screwdriver of the present application.
  • the electric tool provided by the embodiment of the present application is a straight shank screwdriver including a cylindrical casing 100 and assembled to the casing 100 .
  • the cage assembly 200 is internal.
  • the cage assembly 200 includes a cage 2, a drive member 3, and an actuator member 4.
  • the retainer 2 is integrally injection molded, and has a base portion 21, a rear retainer 22 extending rearward from the base portion 21, and a front retainer 23 extending forward from the base portion 21, the driving member 3
  • the output member 4 is disposed on the front holder 23 and has an output shaft 401 extending forwardly and located at the front end of the straight handle driver.
  • the output shaft 401 is substantially parallel to the straight shank.
  • the geometric axes of the screwdrivers coincide.
  • the driving member 3 refers to a component that supplies power and circuit management for the power tool, and includes a battery 31 and a circuit board 32, specifically a cylindrical battery and an elongated circuit board, in the present embodiment, the cylindrical battery 31.
  • the rectangular circuit board 32 is parallel to the output shaft 401 and at least partially overlaps in the front-rear direction, the core of the cylindrical battery 31 does not coincide with the output shaft 401, and the output shaft 401 is not in the circuit.
  • the plate 32 is in the plane of the board; the core line here refers to the axis of the carbon pole of the cylindrical battery, and if the battery is cylindrical, the core line substantially coincides with the axis of the cylinder; the actuator 4 refers to performing the motion
  • the components of the torque output include a motor 41 and a reduction gear set 42 that are coaxially disposed.
  • the reduction gear set 42 is covered by a gear box 421 and is press-fitted integrally with the motor 41.
  • the motor 41 is located at the rear end of the actuator 4 and has a larger outer diameter than the gear box 421 having a front end surface 422 and extending from the front end surface 422 and located in the housing 100
  • the output shaft 401 of the front end also has a bit holder (not labeled) on the output shaft 401 to fit the corresponding bit (not shown) to complete the operation.
  • the driving member 3 and the executing member 4 are assembled to the holder 2 to form a holder assembly 200 that can be modularly embedded in the housing 100.
  • the actuator member 4 in the holder assembly 200 is assembled in the front holder 23 in a front-rear movement, and the driving member 3 is fixedly assembled to the rear holder 22.
  • the cage assembly 200 further includes at least a part of the connecting component electrically connected to the driving component 3 and the executing component 4, for example, the cage component 200 of the embodiment includes at least the battery 31 and the circuit.
  • the connecting parts are shown.
  • the design that the drive member 3 and the actuator member 4 are co-assembled to the cage 2 before the insertion to form the cage assembly 200 realizes the modularization of the drive member 3 and the actuator member 4 by the cage 2, reducing the fixing and cooperation
  • the design redundancy caused by the structure makes the overall driver compact and compact.
  • the motor 41 is at least partially assembled to the front holder 23 and is movable in the front-rear direction (ie, the direction of the output shaft 401).
  • the holder 22 is provided with a battery housing portion 221 and a circuit board housing portion 222 that are opened in the front-rear direction (that is, in a direction parallel to the output shaft 401).
  • the battery 31 and the circuit board 32 are respectively received and held in the battery housing portion. 221 and the circuit board housing portion 222.
  • the eccentric arrangement of the battery 31 and the motor 41 shown in this embodiment provides a larger design space for the circuit board 32, and the design of the circuit board 32 parallel to the front-rear direction allows for additional on the circuit board.
  • the component is, for example, a charging port 321 (in this embodiment, a Micro USB connector assembled at the rear end of the circuit board, having a plugging direction parallel to the board surface of the circuit board 32 and a mounting surface attached to the circuit board 32), and an electronic clutch 322 (The torque maximum value of the screwdriver is electronically adjusted, and the mounting surface attached to the circuit board 32 is also provided.
  • the specific form of the electronic clutch in the embodiment is a disk-shaped torque knob, etc., and can have a large mounting area and can be high. The strength is distributed on the outer side or the rear end surface of the housing 100.
  • the housing 100 is integrally injection molded and penetrates in the front-rear direction, and has a sleeve inner cavity 111 and an axial opening communicating with the sleeve inner cavity 111.
  • the axial opening specifically includes a front opening 112 and a rear opening. 113.
  • the housing 100 further includes a front cover 12 assembled to the front opening 112 and a rear cover 13 assembled to the rear opening 113.
  • the rear cover 13 is generally arched, including the rear opening 113. a matching end edge and a raised central portion, the output shaft 401 is not in the plane of the circuit board 32, the torque knob is exposed on the transition surface between the end edge and the projection, so that the curved transition surface can be utilized The torque knob is naturally exposed to the rear cover 13.
  • the housing 100 has a small front, rear, and large shape, and is provided with a constricted portion 114 at a position forward of the middle portion.
  • the constricted portion 114 is provided with a stop position corresponding to the sleeve inner cavity 111.
  • the portion 115 is specifically a closed stop ring or a segmented stop block.
  • the rear end of the housing 100 is square or quasi-square, and the circuit board 32 is substantially parallel to one side of the square or square, so that a more efficient board layout can be obtained.
  • the sleeve inner chamber 111 further has a guide member 14 extending in the front-rear direction, and the outer periphery of the holder 2 is provided with a guide groove 24 that cooperates with the guide member 14.
  • the holder assembly 200 is loaded into the sleeve inner cavity 111 from the axial opening (specifically, the rear opening 113 in this embodiment) and when the front end of the front holder 23 abuts against the rear side of the stopping portion 115 Stopping, the gearbox 42 continues to extend forward through the stop 115, that is, the cage assembly 200 can be inserted into the housing 100 in the front-rear direction.
  • the driver further includes a preset member 5 that elastically presets the actuator member 4 away from one end of the driving member 3, the preset member 5 including the front opening 112 and being sleeved in the execution
  • the spring 51 of the outer periphery of the component 4 (specifically, the gear case 421 in this embodiment).
  • the rear end of the spring 51 abuts against the front side of the stopping portion 115, and the front end abuts against a side plate 52 extending from the executing member 4.
  • the side plate 52 is annular, and the output shaft 401 passes through the side plate 52 and continues to extend forward.
  • the side plate 52 is fixed to the side plate 422 by a plurality of fastening holes 424 formed in the front end surface 422. Gearbox 42.
  • the outer circumference of the actuator member 4 (specifically, the outer circumference of the motor 41 in the embodiment) is provided with an anti-rotation portion 423 that cooperates with the cage 2 or the housing 100 to achieve a circumferential limit to fix the motor stator and the stator thereof.
  • the actuators perform circumferential limit and anti-rotation.
  • the driving member 3 further includes a start switch 34.
  • a flat pressure sensitive switch is specifically disposed.
  • the base portion 21 is recessed with a switch receiving portion 211 for placing the start switch 34.
  • the actuator member 4 is normally held elastically in a position that does not trigger the start switch 34 and can drive the start switch 34 to be triggered when subjected to an external force.
  • the flat start switch 34 is placed in the switch receiving portion 211 in a posture perpendicular to the front-rear direction, and the electric screwdriver further includes a rear end disposed at the execution member 4, specifically, a rear end of the motor 41.
  • the switch pressing portion 43 is located in the pressing region of the flat start switch 34. Based on the pre-elastic force provided by the spring 51, the actuator member 4 is held away from the position of the start switch 34 (i.e., away from the base 21 of the holder 2) in the non-operating state, while the housing 100 is held and ready for processing.
  • the actuator 4 overcomes the elastic force of the spring 51, so that the switch pressing portion 43 presses the start switch 34, and the drive member 3 starts supplying power to the actuator member 4, causing the bit holder to rotate.
  • the drive unit 3 processes and feeds back different output torques to the actuator 4 to conform to the user's operating habits.
  • the front cover 12 is engaged with the front opening 112 of the housing 100 after the spring 51 and the side plate 52 are inserted into the sleeve inner cavity 111 and fixed to the actuator member 4, and the bit holder extends out of the front cover
  • the rear cover 13 is fastened to the housing 100 by a nut (not shown) after the holder assembly 200 is inserted into the sleeve inner cavity 111.
  • the nut hole 141 of the embodiment is disposed.
  • the existing structure can be fully utilized.
  • the holder assembly 200 further includes a diverter switch 35 integrated on the circuit board 32 and slidable in the front-rear direction, the reversing switch 35 participating in the working circuit, the housing 100 An operation portion 351 that can drive the changeover switch 35 is opened on the outer side wall.
  • the holder assembly 200 is confined between the blocking portion 11 and the rear cover 13 and is completely housed inside the housing 100 .
  • the rear cover 13 assembled to the rear opening 113 is generally in the shape of a centrally convex arch, and the rear end of the circuit board 32 is provided with the electrons parallel to the board surface and exposed to the arched back cover 13.
  • the charging port 322 is mounted on the rear end group of the circuit board 32 and has an end surface parallel to the board surface of the circuit board 32 and exposed to the arched back cover 13.
  • the content claimed in the present application is as follows: a screwdriver having a front end of an output shaft 401 and a rear end remote from the output shaft 401, the screwdriver including an elongated housing 100 and a set
  • the holder assembly 200 includes a holder 2 and a motor 41 and a reduction gear set 42 assembled at a front portion of the holder 2, the motor 41 and a reduction gear set 42 is longitudinally movable in the front cage 23, the driver further comprising elastically presetting the motor 41 and the reduction gear set 42 away from the rear end and at the output shaft
  • the 401 is driven by an external force to urge the motor 41 and the reduction gear set 42 to move backward and to turn on the preset member 5 of the working circuit of the motor 41.
  • the cage assembly 200 further includes a connecting member electrically connected to the driving member 3 and the motor 41 to participate in a working circuit.
  • the housing 100 is integrally injection molded and includes a sleeve lumen 111 having a front opening 112 and a rear opening 113 from which the cage assembly 200 is loaded.
  • the reduction gear set 42 is assembled in front of the motor 41, the outer diameter of the reduction gear set 42 is smaller than the outer diameter of the motor 41, and the sleeve inner cavity 111 has a stop portion 115, the stop The portion 115 has a hollow passage that allows the reduction gear set 42 to pass but does not allow the motor 41 to pass.
  • the retainer assembly 200 is assembled and located on the rear side of the stop portion 115, the reduction gear set 42 passes through the stop portion 115 and continues to extend forward, and the preset member 5 includes the front opening 112 is mounted and assembled to the side plate 52 at the front end of the reduction gear set 42.
  • the presetting member 5 further includes abutting between the front side of the stopping portion 115 and the side plate 52 to move the motor 41.
  • the reduction gear set 42 is preset to a spring 51 remote from the rear end position of the driver.
  • the driving component 3 includes a battery 31 and a circuit board 32.
  • the rear holder 22 has a battery receiving portion 221 and a circuit board receiving portion 222 which are opened parallel to the output shaft 401.
  • the battery 31 and the circuit board 32 are fixedly assembled. Provided in the rear cage 22.
  • the driver includes a housing 100 and a battery 31 housed in the housing 100, a circuit board 32, and an actuator 4 driven by the battery 31 and the circuit board 32.
  • the actuator 4 includes a motor 41, a reduction gear set 42 and an output shaft 401 at the front end of the driver and driven by the reduction gear set 42, the actuator 4 being resiliently preset and compressible
  • the relative movement with the housing 100 is also generated, the driver further comprising a switch 34 that participates in the working circuit of the driver and that can be triggered during the relative movement.
  • the actuator member 4 is movably disposed at a front portion of the housing 100, and the battery 31 and the circuit board 32 are fixedly disposed at a rear portion of the housing 100.
  • the dynamic and static parts are rationally laid out and effectively distinguished, resulting in a more compact design.
  • the battery 31 is a cylindrical battery
  • the circuit board 32 is an elongated circuit board, and the battery and the circuit board at least partially overlap in the front-rear direction. This design further compresses the space footprint in the length direction.
  • the inner cavity of the housing 100 has a stopping portion 111, and the executing member 4 further includes a side plate 52, and the driver further includes a front side of the stopping portion 111 and a rear side of the side plate 52. Between the presets 51.
  • the preset member 51 is a spring that is sleeved on the outer circumference of the reduction gear set 42 .
  • the sleeve structure of the spring using the reduction gear set 42 as a middle support member, can achieve better retention and movement effects.
  • the reduction gear set 42 is coaxially assembled in front of the motor 41, the reduction gear set 42 is smaller than the outer diameter of the motor 41, and the outer diameter of the spring is not greater than the outer diameter of the motor 41.
  • the relative movement refers to the movement of the actuator 4 relative to the housing 100 in the axial direction of the output shaft 401, that is, the relative movement caused by the pressing.
  • the outer circumference of the actuating member 4 is provided with an anti-rotation portion 423 having a groove 425 that continuously maintains a circumferential limit during the stroke of the relative movement. All or part of the anti-rotation portion 423 is integrally formed on the outer casing of the reduction gear set 42.
  • the housing 100 is an integrally formed or assembled housing.
  • the reduction gear set is covered by the gear box and is press-fitted with the motor.
  • the reduction gear set may not be provided with a gear box or directly built into the housing of the motor.
  • the on and off of the working circuit in this embodiment is implemented by pressing and starting the pressure sensitive switch, and in other embodiments, the micro switch can also be selected, and even the starting mode can adopt the general design.
  • the present embodiment is specifically an electric screwdriver, but the compact design of the present application can also be applied to other power tools such as electric drills, electric hammers, and the like; and, this embodiment
  • the venting portion of the sleeve is provided with a stopper portion corresponding to the position of the sleeve inner cavity, so that the sag formed by the recessed structure can be used to form the stopper, and in other embodiments, even if there is no shrinkage portion design, It is also possible to freely set the stopper as needed.
  • various changes and modifications can be made by those skilled in the art without departing from the scope of the present application. Therefore, all equivalent technical solutions are also within the scope of the present application. The scope should be defined by the claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

一种起子机，包括壳体（100）和收容于所述壳体（100）的电池（31）、电路板（32）以及由所述电池（31）和电路板（32）驱动的执行部件（4），所述执行部件（4）包括电机（41）、减速齿轮组（42）以及位于所述起子机前端并由所述减速齿轮组（42）驱动的输出轴（401），所述执行部件（4）被弹性地预置并可在受压时与所述壳体（100）产生相对运动，所述起子机还包括参与组成所述起子机的工作电路且可在所述相对运动的过程中被触发的开关（34）。所述执行部件被弹性地预置并可在受压时触发起子机工作电路工作的设计，快速实现设计组装和实现压力启动功能，更加地紧凑和小型化。

Description

起子机
本申请要求2016年12月30日向中国国家知识产权局提出的标题为“起子机”的第201611258724.1号专利申请以及2017年7月17日向中国国家知识产权局提出的标题为“起子机”的第201710579871.7号专利申请的优先权。
技术领域
本申请涉及电动工具，尤其涉及一种起子机。
背景技术
电动起子机是普遍使用的一种基础电动工具。近年来，随着不断增加的功能，如扭矩控制、电源管理等，带来了更复杂更大体积的电路板设计，加之许多零部件轴向叠加的结构限制，为电动工具的小型化设计带来了挑战。同时，由于零件多而散，零件的布局和作动设计也越来越复杂。此外，业者也在努力地寻找和尝试按压启动等符合人们对传统工具操作习惯和行为反馈的起子机设计。
因此，有必要提供一种紧凑型的电动工具，以克服现有技术中存在的技术问题。
发明内容
本申请要解决的主要是起子机的紧凑和便捷性问题。
为解决上述技术问题，本申请提供一种起子机，包括壳体和收容于所述壳体的电池、电路板以及由所述电池和电路板驱动的执行部件，所述执行部件包括电机、减速齿轮组以及位于所述起子机前端并由所述减速齿轮组驱动的输出轴，所述执行部件被弹性地预置并可在受压时与所述壳体产生相对运动，所述起子机还包括参与组成所述起子机的工作电路且可在所述相对运动的过程中被触发的开关。
根据本申请，所述执行部件被弹性地预置并可在受压时触发起子机工作电路工作的设计，快速实现设计组装和实现压力启动功能，更加地紧凑和小型化。
附图说明
结合附图参阅以下具体实施方式的详细说明，将更加充分地理解本申请。其中：
图1显示本申请起子机的立体结构示意图；
图2显示图1中起子机沿A-A方向的剖视结构示意图；
图3显示本申请起子机在图2剖视状态下的分解结构示意图；
图4显示图1中起子机的分解结构示意图；
图5显示图4中保持架组件和壳体组装前的分解结构示意图；
图6显示图1中起子机另一角度的分解结构示意图；
图7显示本申请起子机中按压启动功能的原理示意图。
具体实施方式
下面结合附图详细描述本申请的具体实施方式。在不同的附图中，相同或相似的部件用相同的附图标记表示。同时应当理解，附图仅用于对本申请进行说明，其中部件的尺寸、比例关系以及部件的数目均不作为对本申请的限制。此外，需要预先说明的是，本申请中所谓的“前”、“前端”是指电动工具轴向靠近待操作对象的一端，“后”、“后端”是指电动工具轴向远离待加工对象中的一端。
请参阅图1至图7所示，并重点参阅图3和图4，本申请具体实施例提供的电动工具为一种直柄的起子机，包括筒状的壳体100和组装于壳体100内的保持架组件200。所述保持架组件200包括保持架2、驱动部件3以及执行部件4。本实施例中，所述保持架2采用一体注塑成型，具有基部21、自基部21向后延伸形成的后保持架22以及自基部21向前延伸形成的前保持架23，所述驱动部件3组设于所述后保持架22，所述执行部件4组设于所述前保持架23并具有向前延伸且位于直柄起子机前端的输出轴401,所述输出轴401大致与直柄起子机的几何轴心重合。所述驱动部件3是指为电动工具提供电源和电路管理的部件，在本实施例中包括电池31和电路板32，具体为柱形的电池和长形的电路板，所述柱形电池31和矩形电路板32平行于所述输出轴401并且在前后方向上至少有部分重叠，所述柱形电池31的芯线与所述输出轴401不重合,所述输出轴401也不在所述电路板32 板面内；这里的芯线是指柱形电池的炭极棒所在轴线，如果电池为圆柱形，则所述芯线基本与圆柱形的轴线重合；所述执行部件4是指执行运动和扭矩输出的部件，在本实施例中包括同轴设置的电机41和减速齿轮组42。所述减速齿轮组42由齿轮箱421包覆并与电机41压配于一体。所述电机41位于所述执行部件4的最后端并具有较齿轮箱421更大的外径，所述齿轮箱421具有前端面422以及自所述前端面422伸出并位于所述壳体100前端的所述输出轴401，所述输出轴401上还具有批头保持部(未标示)以适配相应的批头(未图示)完成操作。
所述驱动部件3、执行部件4组设于所述保持架2形成可模块化地嵌装于壳体100内的保持架组件200。所述保持架组件200中的执行部件4可前后运动地组设于所述前保持架23中，所述驱动部件3则被固定地组设于所述后保持架22。当然所述保持架组件200还包括电性连接所述驱动部件3和执行部件4以参与组成工作电路的至少部分连接部件，例如本实施例的保持架组件200则至少包括所述电池31、电路板32和电机41、或者全部或部分的连接线、额外的控制开关或者需要等待整个电动起子机组装完成后才能电性闭合的断点等，附图中出于清晰揭示整体结构的考虑，未图示连接部件。所述将驱动部件3和执行部件4在嵌装前共同组装至保持架2形成保持架组件200的设计，利用保持架2实现了驱动部件3和执行部件4的模块化，减少了固定和配合结构带来的设计冗余，从而使起子机整体更加紧凑和小型化。
请继续参阅附图并重点参阅图2和图3，所述电机41至少部分地组设于所述前保持架23并可在前后方向(亦即输出轴401的方向)上运动，所述后保持架22上设有前后方向开设(亦即平行于输出轴401的方向)的电池收容部221和电路板收容部222，所述电池31和电路板32分别收容并固持于所述电池收容部221和电路板收容部222内。此外，本实施例中所示的电池31与电机41的偏心设置，为电路板32提供了更大的设计空间，而且，电路板32与所述前后方向平行的设计，使得电路板上的附加元件如充电口321(本实施例中为组装于电路板后端的Micro USB接插口，具有平行于电路板32板面的接插方向和贴附于电路板32的安装面)、电子离合器322(电子方式调节起子机的扭矩最大值，亦具有贴附于电路板32的安装面，本实施例中所述电子离合器的具体形式为盘形扭矩旋钮)等，可以具 有大的安装面积进而可以高强度地分布于壳体100的外侧面或者后端面。
所述壳体100系整体注塑成型并在前后方向上贯通，具有套筒内腔111以及与所述套筒内腔111相通的轴向开口,所述轴向开口具体包括前开口112和后开口113，所述壳体100还包括组装于所述前开口112的前盖12和组装于所述后开口113的后盖13，所述后盖13总体呈拱形，包括与所述后开口113匹配的端缘以及凸起的中部，所述输出轴401不在电路板32平面上，所述扭矩旋钮暴露于所述端缘和凸起之间的过渡表面上，如此可以利用弯曲的过渡表面将扭矩旋钮自然地暴露于后盖13。所述壳体100整体略呈前小后大状，并于中段偏前的位置设有便于握持的缩口部114，所述缩口部114对应套筒内腔111的位置设有挡止部115，所述挡止部115具体为闭合的挡止环或者分段的挡止块。所述壳体100的后端呈方形或类方形，所述电路板32大致平行于所述方形或者类方形的一个边，这样可以获得利用率更高的电路板布局。所述套筒内腔111还具有前后方向延伸设置的导向部件14，所述保持架2外周设有与所述导向部件14配合的导引槽24。所述保持架组件200自所述轴向开口(本实施例中具体为后开口113)装入套筒内腔111并在所述前保持架23前端抵靠所述挡止部115后侧时停止，所述齿轮箱42穿过所述挡止部115继续向前延伸，亦即所述保持架组件200可沿所述前后方向插装于壳体100。
所述起子机还包括将所述执行部件4弹性地预置于远离驱动部件3一端的预置部件5，所述预置部件5包括自所述前开口112装入并套设于所述执行部件4(本实施例中具体为齿轮箱421)外周的弹簧51。所述弹簧51后端抵靠于所述挡止部115前侧，前端则抵靠于一个自执行部件4延伸出的边板52。本实施例中，所述边板52呈环状，所述输出轴401穿过边板52并继续向前伸出，所述边板52借助前端面422上开设的若干紧固孔424固定于齿轮箱42。所述执行部件4的外周(本实施例中具体为电机41的外周)开设有与保持架2或者壳体100配合以实现周向限位的防转部423，以对电机定子及其固接的执行部件进行周向限位和防转。所述驱动部件3还包括一个启动开关34，本实施例中具体为扁平状压敏开关，所述基部21面向前端一侧凹设有放置所述启动开关34的开关收容部211。所述执行部件4常态被弹性地保持在不触发所述启动开关34的位置并可在受到外力时驱使所述启动开关34被触发。所述扁平状启动开关34以垂直于前后方向 的姿态置于所述开关收容部211内，所述电动起子机还包括一个设置在执行部件4后端，具体为所述电机41的后端，且位于所述扁平状启动开关34按压区域的的开关按压部43。基于所述弹簧51提供的预弹力，使得执行部件4在非工作状态时保持远离启动开关34(亦即远离保持架2的基部21)的位置，而在壳体100被握持并向待加工对象施加外力时，执行部件4克服弹簧51的弹性力，使得所述开关按压部43按压启动开关34，驱动部件3开始供电给执行部件4，带动批头保持部转动。根据启动开关34受到外力大小的变化，驱动部件3处理和反馈不同的输出转矩给执行部件4，以符合使用者的操作习惯。
所述前盖12在弹簧51和边板52装入套筒内腔111并固定至所述执行部件4后卡合至所述壳体100的前开口112，所述批头保持部伸出前盖12；所述后盖13在保持架组件200装入套筒内腔111后利用螺母(未图示)紧固至所述壳体100上，具体地，本实施例的所述螺母孔141设置在壳体100的导向部件14上，可以充分利用现有结构。所述保持架组件200还包括集成在所述电路板32上并可沿所述前后方向滑移的换向开关35，所述换向开关35参与组成所述工作电路，所述壳体100的外侧壁上开设有可驱动所述换向开关35的操作部351。所述后盖13组装于所述壳体100后，所述保持架组件200被限位于所述挡止部11和后盖13之间并完全收容于壳体100内部。并且，所述组装于后开口113的后盖13总体呈中部凸起的拱形，所述电路板32后端组设有平行于板面并显露于所述拱形后盖13的所述电子离合器322，所述电子离合器322具体提供一个显露于所述拱形后盖13以拨动调节的盘形扭矩旋钮。由于所述输出轴401不在电路板32平面上，所述扭矩旋钮也不在拱形后盖13的中部凸起上，因而扭矩旋钮可以暴露于所述拱形后盖13的过渡曲面上。所述充电口322安装于所述电路板32后端组并具有平行于电路板32板面并暴露于所述拱形后盖13的端面。
综上所述，概括本申请主张保护的内容如下：一种起子机，具有输出轴401的前端以及远离所述输出轴401的后端，所述起子机包括纵长的壳体100以及组设于所述壳体100的保持架组件200，所述保持架组件200包括保持架2以及组设于所述保持架2前部的电机41和减速齿轮组42，所述电机41和减速齿轮组42可前后运动地组设于所述前保持架23中,所述起子机还包括弹性地将所述电机41和减速齿轮组42预置于远离所述后端的 位置并可在所述输出轴401受到外力按压时驱使所述电机41和减速齿轮组42向后运动并导通电机41工作电路的预置部件5。所述保持架组件200还包括电性连接所述驱动部件3和电机41以参与组成工作电路的连接部件。
所述壳体100系整体注塑成型并包括具有前开口112和后开口113的套筒内腔111，所述保持架组件200自所述后开口113装入所述壳体100。所述减速齿轮组42组装于所述电机41的前方，所述减速齿轮组42的外径小于所述电机41的外径，所述套筒内腔111具有挡止部115，所述挡止部115具有允许所述减速齿轮组42通过却不允许所述电机41通过的中空通道。所述保持架组件200组装并位于所述挡止部115后侧，所述减速齿轮组42穿过所述挡止部115并继续向前延伸，所述预置部件5包括自所述前开口112装入并组设于所述减速齿轮组42前端的边板52，所述预置部件5还包括抵靠于所述挡止部115前侧和边板52之间以将所述电机41和减速齿轮组42预置于远离所述起子机的后端位置的弹簧51。所述驱动部件3包括电池31和电路板32，所述后保持架22具有平行于输出轴401开设的电池收容部221和电路板收容部222，所述电池31和电路板32被固定地组设于所述后保持架22。
综上，简要概括一下本申请的主要内容：所述起子机包括壳体100和收容于所述壳体100的电池31、电路板32以及由所述电池31和电路板32驱动的执行部件4，所述执行部件4包括电机41、减速齿轮组42以及位于所述起子机前端并由所述减速齿轮组42驱动的输出轴401，所述执行部件4被弹性地预置并可在受压时与所述壳体100产生相对运动，所述起子机还包括参与组成所述起子机工作电路且可在所述相对运动的过程中被触发的开关34。所述执行部件4可活动地设置于所述壳体100的前部，所述电池31和电路板32固定地设置于所述壳体100的后部。动静部分合理布局、有效区分，进而获得更紧凑的设计。所述电池31为柱形电池，所述电路板32为长形电路板，所述电池和电路板在前后方向上至少有部分重叠。此设计进一步压缩了长度方向上的空间占用。所述壳体100内腔具有挡止部111，所述执行部件4还包括一个边板52，所述起子机还包括夹设于所述挡止部111前侧和所述边板52后侧之间的预置件51。所述预置件51为套设于所述减速齿轮组42外周的弹簧。该弹簧的套设结构，利用减速齿轮组42作为中部支撑件，可以获得更好的保持和运动效果。所述减速齿轮组42同轴 地组装于所述电机41的前方，所述减速齿轮组42小于所述所述电机41的外径，所述弹簧的外径不大于所述电机41的外径，以保证执行部件4整体设计的紧凑。所述相对运动是指执行部件4相对于所述壳体100沿所述输出轴401轴向上产生的运动，亦即按压所产生的相对移动。所述执行部件4的外周设有防转部423，所述壳体100内腔具有在所述相对运动的行程内持续保持周向限位的槽425。所述减速齿轮组42的外壳上一体成型有全部或部分所述防转部423。所述壳体100为一体成型或者拼装的壳体。
以上具体实施方式仅用于说明本申请的发明内容，而并非对本申请的限制。例如，上述具体实施方式中减速齿轮组由齿轮箱包覆并与电机压配于一体，在其他一些实施例中，所述减速齿轮组也可以不设置齿轮箱或者直接内置于所述电机的壳体内；其次，本实施例中的工作电路的通断采用对压敏开关进行按压启动的方式来实现，而在其他一些实施例中，也可以选择采用微动开关，甚至启动方式也可以采用一般设计中通常使用的拨钮启动等；再者，本实施例具体为电动起子机，但是，本申请的紧凑设计，同样可以在例如电钻、电锤等其他电动工具中得到应用；以及，本实施例中的所述缩口部对应套筒内腔的位置设有挡止部，因而可以利用其凹陷结构带来的缩口形成挡止，而在其他一些实施例中，哪怕没有缩口部设计，也可以根据需要自由地设置挡止部。综上，有关技术领域的普通技术人员，在不脱离本申请的范围的情况下，还可以做出各种变化和变型，因此所有等同的技术方案也属于本申请的范畴，本申请的专利保护范围应由权利要求限定。

Claims (10)

  1. 一种起子机，包括壳体(100)和收容于所述壳体(100)的电池(31)、电路板(32)以及由所述电池(31)和电路板(32)驱动的执行部件(4)，其特征在于：所述执行部件(4)包括电机(41)、减速齿轮组(42)以及位于所述起子机前端并由所述减速齿轮组(42)驱动的输出轴(401)，所述执行部件(4)被弹性地预置并可在受压时与所述壳体(100)产生相对运动，所述起子机还包括参与组成所述起子机的工作电路且可在所述相对运动的过程中被触发的开关(34)。
  2. 根据权利要求1所述的起子机，其特征在于，所述执行部件(4)可活动地设置于所述壳体(100)的前部，所述电池(31)和电路板(32)固定地设置于所述壳体(100)的后部。
  3. 根据权利要求1所述的起子机，其特征在于，所述电池(31)为柱形电池，所述电路板(32)为长形电路板，所述电池和电路板在前后方向上至少有部分重叠。
  4. 根据权利要求1-3中任一项所述的起子机，其特征在于，所述壳体(100)内腔具有挡止部(115)，所述执行部件(4)还包括一个边板(52)，所述起子机还包括夹设于所述挡止部(115)前侧和所述边板(52)后侧之间的预置件(51)。
  5. 根据权利要求4所述的起子机，其特征在于，所述预置件(51)为套设于所述减速齿轮组(42)外周的弹簧。
  6. 根据权利要求5所述的起子机，其特征在于，所述减速齿轮组(42)同轴地组装于所述电机(41)的前方，所述减速齿轮组(42)小于所述所述电机(41)的外径，所述弹簧的外径不大于所述电机(41)的外径。
  7. 根据权利要求1-3中任一项所述的起子机，其特征在于，所述相对运动是指执行部件(4)相对于所述壳体(100)沿所述输出轴(401)轴向上产生的运动。
  8. 根据权利要求1-3中任一项所述的起子机，其特征在于，所述执行部件(4)的外周设有防转部(423)，所述壳体(100)内腔具有在所述相对运动的行程内持续保持周向限位的槽(425)。
  9. 根据权利要求6所述的起子机，其特征在于，所述减速齿轮组(42)的外壳上一体成型有全部或部分所述防转部(423)。
  10. 根据权利要求1-3中任一项所述的起子机，其特征在于，所述壳体(100)为一体成型或者拼装的壳体。
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CN107378848A (zh) * 2016-12-30 2017-11-24 博世电动工具（中国）有限公司 起子机
CN110253475A (zh) * 2019-06-04 2019-09-20 浙江亿钻科技有限公司 一种扭力可调的电动螺丝批
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