WO2018121723A1 - Tournevis électrique - Google Patents

Tournevis électrique Download PDF

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Publication number
WO2018121723A1
WO2018121723A1 PCT/CN2017/119760 CN2017119760W WO2018121723A1 WO 2018121723 A1 WO2018121723 A1 WO 2018121723A1 CN 2017119760 W CN2017119760 W CN 2017119760W WO 2018121723 A1 WO2018121723 A1 WO 2018121723A1
Authority
WO
WIPO (PCT)
Prior art keywords
rear end
electric screwdriver
switch
circuit board
housing
Prior art date
Application number
PCT/CN2017/119760
Other languages
English (en)
Chinese (zh)
Inventor
陈锋
翟剑平
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
Priority claimed from CN201720967498.8U external-priority patent/CN207373054U/zh
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 DE112017006690.5T priority Critical patent/DE112017006690T5/de
Publication of WO2018121723A1 publication Critical patent/WO2018121723A1/fr

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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
    • 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 present application relates to power tools, and more particularly to an electric 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.
  • the straight shank driver usually has two pieces of housing separated by half, and the assembly is completed by bolting the housing and clamping the parts.
  • the industry is also struggling to find and try straight-handle screwdriver designs that are more in line with people's traditional tool handling habits and behavioral feedback.
  • the main problem to be solved by the present application is the comfort and convenience of the operation of the electric screwdriver.
  • the present application provides an electric screwdriver including an opposite front end and a rear end, and a housing connecting the front end and the rear end, the front end having an output shaft, the rear end being away from the output shaft And the palm can be resisted.
  • the electric screwdriver further includes a switch disposed on the housing, and the switch is located at a position accessible by the finger when the rear end is in contact with the palm.
  • the switch when the back end is in opposition to the palm, the switch is located at a position accessible by the finger, and the switch can be conveniently operated by the finger on the basis of adapting to the palm pressing habit.
  • 1 is a schematic perspective view showing the straight shank of the present application
  • Figure 2 is a cross-sectional structural view showing the straight shank driver of Figure 1 taken along the A-A direction;
  • FIG. 3 is a schematic exploded view showing the straight shank driver of the present application in a cross-sectional view of FIG. 2;
  • Figure 4 is a schematic exploded view showing the straight shank driver 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 other angle of the straight shank driver of Figure 1;
  • Figure 7 is a schematic view showing the principle of the pressing start function in the straight shank driver of the present application.
  • Figure 8 is a schematic view showing the palm backrest of the straight handle driver of the present application.
  • the electric tool provided by the specific embodiment of the present application is a straight shank screwdriver including a cylindrical casing 100 and assembled in a cylindrical casing.
  • the cage assembly 200 within 100.
  • 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 rearmost end of the actuator 4 and has a larger outer diameter than the gear box 421 having a front end face 422 and extending from the front end face 422 and located in the cylindrical case
  • the output shaft 401 of the front end of the body 100 further 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 fitted in the cylindrical casing 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 surface or the rear end surface of the cylindrical casing 100.
  • the cylindrical casing 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 including a front opening 112 and a rear opening 113, the cylindrical 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 being generally arched, including The end edge of the rear opening 113 is matched with the middle of the protrusion, the output shaft 401 is not in the plane of the circuit board 32, and the torque knob is exposed on the transition surface between the end edge and the protrusion, so that the bending can be utilized The transition surface naturally exposes the torque knob to the back cover 13.
  • the tubular housing 100 has a small front and rear large shape, and a constricted portion 114 is provided at a position forward of the middle portion, and the constricted portion 114 is disposed corresponding to the position of the sleeve inner cavity 111.
  • the stopping portion 115 is specifically a closed blocking ring or a segmented blocking block.
  • the rear end of the cylindrical casing 100 has a square shape or a square shape, and the circuit board 32 is substantially parallel to one side of the square or the square shape, so that a more efficient circuit 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 gear case 42 continues to extend forward through the stop portion 115, that is, the holder assembly 200 can be inserted into the cylindrical casing 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.
  • An outer circumference of the actuator member 4 (specifically, an 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 cylindrical housing 100 to achieve a circumferential limit to the motor stator and The fixed actuator performs 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.
  • the actuator member 4 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 cylindrical housing 100 is held and oriented
  • the actuator member 4 overcomes the elastic force of the spring 51, so that the switch pressing portion 43 presses the start switch 34, and the driving member 3 starts supplying power to the actuator member 4 to drive the bit holder holding portion 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 end 112 of the cylindrical 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 is extended.
  • the front cover 12 is fastened to the cylindrical casing 100 by a nut (not shown) after the retainer assembly 200 is inserted into the sleeve inner cavity 111, specifically, the embodiment
  • the nut hole 141 is provided on the guide member 14 of the cylindrical casing 100, and 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 or perpendicular to the front-rear direction, the reversing switch 35 participating in the composition
  • an operation portion (not labeled) having an operation area 351 for driving the changeover switch 35 is opened on an outer side wall of the cylindrical casing 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 straight shank driver includes a front end having an output shaft 401, a rear end remote from the output shaft 401 and being retractable by a palm, and a housing 100 connecting the front end and the rear end, the straight shank driver Also included is a switch 35 disposed on the cylindrical housing 100, the switch 35 being located at a position accessible to the finger, particularly a thumb, when the back cover 13 abuts the palm.
  • the switch 35 has an operation area 351 for the finger to touch, and the operation area 351 is located at a rear end surface of the housing 100 at a position of 29 mm to 64 mm.
  • the switch 35 is located at a switch position A of the rear end of 29 mm to 64 mm. This is a range of distances that match the stroke of the finger. Sectional area of the tubular housing 100 interposed between 7.5cm 2 to 11.5cm 2, if the cross-sectional area, i.e. screwdriver too thick or too thin, it will also affect the operator's finger convenience.
  • the rear cover 13 is generally curved in the middle and has a rounded curved transition. This design is more suitable for matching the curve of the palm position, and is not easy for the operator to feel fatigue and discomfort.
  • the arcuate transition C of the back cover 13 is within 19 mm of the rear end, because when the curved transition C is pulled long, the back cover 13 gives a sharp feeling to the overall comfort. There will also be a negative effect.
  • the rear portion of the cylindrical casing 100 is provided with a circuit board 32 parallel to the output shaft 401.
  • the rear end of the circuit board 32 is provided with a charging port 322 parallel to the circuit board 32.
  • the rear cover 13 A corresponding opening (not shown) is provided, and the charging port 322 is non-protrudingly exposed to the opening, and is provided with a soft plastic dust cover (not shown) so as not to interfere with the palm experience.
  • the rear end of the circuit board 32 is further provided with a disk-shaped torque knob (ie, a specific form of the electronic clutch 322) parallel to the circuit board 32, and the disk-shaped torque knob is exposed to the edge in a convex or non-protruding manner.
  • the rear cover 13 is provided with a notch (not shown) for giving the disc-shaped torque knob. Since the disc-shaped torque knob is exposed at the edge of the edge, the proper protrusion does not have a significant influence on the palm feel, and This protrusion can be used to adjust the knob.
  • the straight shank driver of the present embodiment further includes a motor 41 and a reduction gear set 42 that are longitudinally movably assembled in the cylindrical casing 100, and elastically presets the motor 41 and the reduction gear set 42 away from each other. a position of the rear end and a preset member 5 for driving the motor 41 and the reduction gear set 42 to move backward when the output shaft 401 is pressed by an external force, the motor 41 and the reduction gear set 42 moving backward
  • the working circuit that turns on the motor 41 is triggered during the process.
  • the combination of the above-mentioned pressing method and the gripping method of the palm pressing back cover can provide a more comfortable and convenient operation experience.
  • the switch 35 is a reversing switch that is slidable in a circumferential direction perpendicular to the output shaft 401 on the outer wall of the cylindrical casing 100.
  • the thumb can flexibly perform the sliding adjustment in the circumferential direction.
  • the housing 100 has a cylindrical shape and the rear cover 13 separated from the housing 100 is not an essential structural feature.
  • an electric screwdriver including an opposite front end and a rear end, and a housing 100 connecting the front end and the rear end, the front end having an output shaft 401, the rear end Away away from the output shaft 401 and being retractable by the palm
  • the electric screwdriver further includes a switch 35 disposed on the housing 100, the switch 35 being located at a finger accessible when the rear end is in opposition to the palm position.
  • the switch 35 has an operation area 351 for access by a finger, and the operation area 351 is located at a position of 29 mm to 64 mm from the rear end of the housing 100.
  • the cross-sectional area of the housing 100 is between 7.5cm 2 to 11.5cm 2.
  • the rear end is generally an arc-shaped transition with a central arched edge and a rounded edge.
  • the housing 100 has a cylindrical shape, and the electric screwdriver has a rear cover 13 assembled at a rear end of the housing 100.
  • the arcuate transition C of the back cover 13 is located within 19 mm of the rear end.
  • the rear panel of the housing 100 is provided with a circuit board 32 parallel to the output shaft 401.
  • the rear end of the circuit board 32 is provided with a charging port 322 parallel to the circuit board 32.
  • the rear cover 13 is provided. Corresponding openings, the charging port 322 are non-protrudingly exposed to the opening.
  • the rear end of the circuit board 32 is provided with a disk-shaped torque knob parallel to the circuit board 32.
  • the disk-shaped torque knob is exposed in a convex or non-protruding manner to the edge of the edge, and the rear cover 13 is provided with The gap of the disc-shaped torque knob is located.
  • the electric screwdriver further includes a motor 41 and a reduction gear set 42 that are longitudinally movably assembled in the housing 100, and elastically presets the motor 41 and the reduction gear set 42 away from the rear end. a preset member 5 that can move the motor 41 and the reduction gear set 42 backward when the output shaft 401 is pressed by an external force, and the motor 41 and the reduction gear set 42 trigger the guide during the backward movement.
  • the working circuit of the motor 41 is passed.
  • the switch 35 is a reversing switch that is slidable in the circumferential or axial direction of the output shaft 401 on the outer wall of the housing 100.
  • 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)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Power Tools In General (AREA)

Abstract

L'invention concerne un tournevis électrique, comprenant une extrémité avant et une extrémité arrière qui sont opposées l'une à l'autre et une coque (100) reliant l'extrémité avant et l'extrémité arrière. L'extrémité avant est pourvue d'un arbre de sortie (401) et l'extrémité arrière est éloignée de l'arbre de sortie (401) et peut être supportée par la paume d'une main. Le tournevis électrique comprend en outre un commutateur (35) qui est prévu sur la coque (100). Le commutateur (35) est positionné à une position qui peut être touchée par un doigt lorsque l'extrémité arrière est supportée par une paume. Avec le tournevis électrique selon l'invention, une fois habitué à l'utilisation de la paume pour le pressage, l'utilisateur peut utiliser de manière pratique ses doigts pour actionner le commutateur.
PCT/CN2017/119760 2016-12-30 2017-12-29 Tournevis électrique WO2018121723A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112017006690.5T DE112017006690T5 (de) 2016-12-30 2017-12-29 Elektrischer Schraubendreher

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201720967498.8 2016-12-30
CN201720967498.8U CN207373054U (zh) 2016-12-30 2016-12-30 电动起子机
CN201621475400.9U CN206335510U (zh) 2016-12-30 2016-12-30 直柄起子机
CN201621475400.9 2016-12-30
CN201720863861.1 2017-07-17
CN201720863861 2017-07-17

Publications (1)

Publication Number Publication Date
WO2018121723A1 true WO2018121723A1 (fr) 2018-07-05

Family

ID=62710315

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/119760 WO2018121723A1 (fr) 2016-12-30 2017-12-29 Tournevis électrique

Country Status (2)

Country Link
DE (1) DE112017006690T5 (fr)
WO (1) WO2018121723A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110026936A (zh) * 2019-04-22 2019-07-19 南京久驰机电实业有限公司 一种螺丝刀及其组装方法
CN110385668A (zh) * 2019-07-23 2019-10-29 刘勉群 一种手动和自动一体式螺丝刀
CN112975816A (zh) * 2021-04-23 2021-06-18 苏州造物空间智能科技有限公司 电动螺丝批
EP4049793A1 (fr) * 2021-02-25 2022-08-31 Black & Decker, Inc. Clé motorisée

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022210259A1 (de) * 2022-09-28 2024-03-28 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einem Positionierungsgerüst

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044234A (en) * 1990-03-13 1991-09-03 Cheng Chuan Yi Electrical screwdriver
CN201482992U (zh) * 2009-03-02 2010-05-26 宋树建 一种全自动电动螺丝刀
CN102825569A (zh) * 2012-08-22 2012-12-19 南京德朔实业有限公司 压力触发工作的电动工具
CN204171935U (zh) * 2013-12-26 2015-02-25 南京德朔实业有限公司 电动螺丝批
CN206335510U (zh) * 2016-12-30 2017-07-18 博世电动工具（中国）有限公司 直柄起子机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044234A (en) * 1990-03-13 1991-09-03 Cheng Chuan Yi Electrical screwdriver
CN201482992U (zh) * 2009-03-02 2010-05-26 宋树建 一种全自动电动螺丝刀
CN102825569A (zh) * 2012-08-22 2012-12-19 南京德朔实业有限公司 压力触发工作的电动工具
CN204171935U (zh) * 2013-12-26 2015-02-25 南京德朔实业有限公司 电动螺丝批
CN206335510U (zh) * 2016-12-30 2017-07-18 博世电动工具（中国）有限公司 直柄起子机

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110026936A (zh) * 2019-04-22 2019-07-19 南京久驰机电实业有限公司 一种螺丝刀及其组装方法
CN110026936B (zh) * 2019-04-22 2024-03-05 威汉工具(上海)有限公司 一种螺丝刀及其组装方法
CN110385668A (zh) * 2019-07-23 2019-10-29 刘勉群 一种手动和自动一体式螺丝刀
EP4049793A1 (fr) * 2021-02-25 2022-08-31 Black & Decker, Inc. Clé motorisée
CN112975816A (zh) * 2021-04-23 2021-06-18 苏州造物空间智能科技有限公司 电动螺丝批

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