WO2013020485A1 - 动力工具及用于该动力工具的操作方法 - Google Patents

动力工具及用于该动力工具的操作方法 Download PDF

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Publication number
WO2013020485A1
WO2013020485A1 PCT/CN2012/079689 CN2012079689W WO2013020485A1 WO 2013020485 A1 WO2013020485 A1 WO 2013020485A1 CN 2012079689 W CN2012079689 W CN 2012079689W WO 2013020485 A1 WO2013020485 A1 WO 2013020485A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting shaft
working head
power tool
casing
output shaft
Prior art date
Application number
PCT/CN2012/079689
Other languages
English (en)
French (fr)
Inventor
张士松
钟红风
庞晓丽
徐静涛
安德罗•保罗
王家达
陈志�
Original Assignee
苏州宝时得电动工具有限公司
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 CN201110224642.6A external-priority patent/CN102909707B/zh
Priority claimed from CN201110224257.1A external-priority patent/CN102909698B/zh
Priority claimed from CN201110224280.0A external-priority patent/CN102909699B/zh
Priority claimed from CN201110224925.0A external-priority patent/CN102909708B/zh
Priority claimed from CN201210166387.9A external-priority patent/CN102909709B/zh
Priority claimed from CN2012102339463A external-priority patent/CN102909704A/zh
Priority to EP12822060.5A priority Critical patent/EP2740571B1/en
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
Priority to KR1020147006160A priority patent/KR20140054207A/ko
Priority to EP17154867.0A priority patent/EP3184260B1/en
Priority to US13/628,580 priority patent/US9421681B2/en
Publication of WO2013020485A1 publication Critical patent/WO2013020485A1/zh
Priority to US15/211,825 priority patent/US10391624B2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/029—Construction of casings, bodies or handles with storage compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • 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

Definitions

  • This invention relates to a power tool, and more particularly to a gun drill type power tool that can realize storage and quick change of a work head.
  • the invention also relates to a method of operation for the above described power tool.
  • An electric screwdriver is a commonly used electric tool for tightening screws onto a workpiece.
  • the operator is greatly inconvenienced, on the one hand, the replacement work head is cumbersome, and on the other hand, the removed work head is easily lost anywhere.
  • the Chinese utility model patent CN201086280Y discloses a multi-tool power tool, which comprises a power tool body and a multi-head rotor structure, and the multi-head rotor structure comprises a multi-head rotor which can accommodate a plurality of cutter heads,
  • the cutter head drum is axially slidably coupled to the tool body.
  • the desired cutter head can be selected by rotating the multi-blade drum.
  • the number of cutter heads stored in the drum is limited. When the operator needs to use other cutter heads, it is troublesome to replace them.
  • the connecting shaft is exposed, and dust and powder may enter the inside of the power tool or the multi-head reel during the sliding process of the multi-blade drum.
  • a long time will cause the multi-head reel to be unable to rotate for the choice of the cutter head, or directly cause the power tool to be unusable.
  • the working head is placed on the workpiece, so that the connecting shaft needs to bear the force in the opposite direction, and the connecting shaft will bring pressure to the transmission mechanism, so that the transmission mechanism cannot transmit the torque to the connecting shaft, and the configuration also makes the multi-knife The drive of the head power tool is not reliable.
  • the operator may trigger the cutter head to drive the shaft to rotate and then rotate the motor, which may damage the motor and cannot be manually operated to tighten the screw, which brings great inconvenience to the operator.
  • the cutter head When replacing the cutter head, the cutter head needs to be returned to the runner first, in order to prevent the runner from moving axially.
  • the rotation of the cutter head directly through the connecting shaft is relatively unstable, because the longer the length of the connecting shaft, the greater the jump of the connecting shaft, which brings some potential danger to the user of the tool.
  • the roller since the roller needs to be axially moved apart from the connecting shaft, it is easy to enter dust and the like and cannot be cleaned.
  • the angle of the wall of the working head on the connecting shaft is uncertain when the machine is stopped, and the angle of the working head retreating the rotating wheel is also uncertain, so the working head is replaced.
  • there may be a misalignment between the angle of the wall of the connecting shaft and the angle of the working head which may result in the working head not being able to enter the connecting shaft correctly and smoothly.
  • the Chinese utility model patent CN201086280Y also discloses that the multi-head reel is linked with the switch.
  • the required cutter head can be selected by rotating the multi-blade reel;
  • the multi-head rotor slides back to the tool body, it drives the linkage rod to move, and the linkage rod will touch the switch to make the motor work, and rotate the angle to make the sleeve angle match the angle of the cutter head.
  • the normal short-time start-up motor is likely to cause the motor life to be shortened or damaged; on the other hand, the multi-head rotor and the switch linkage need precise positioning control, and the cost is high.
  • Another object of the present invention is to provide a power tool that is reliable in operation. Another object of the present invention is to provide an operating method of a power tool having higher efficiency.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism, disposed between the motor and the output shaft and transmitting the rotary power outputted by the motor to the output shaft;
  • the storage clip is disposed in the casing, the storage clamp includes a working head for accommodating a plurality of juxtaposed a receiving compartment, wherein the connecting shaft is capable of being mated with one of the plurality of working heads through the receiving compartment and having one of the working heads located in the receiving hole and the plurality of working heads A linear movement between separate release positions;
  • the power tool further includes a limit mechanism disposed between the housing and the connecting shaft, the limit mechanism including operatively at two , ,
  • a limiting block for moving between positions, wherein in the first position, the connecting shaft is in a working position, the limiting block restricts the movement of the connecting shaft away from the working head, and in the second position, the connecting shaft is in a releasing position,
  • the stop block allows the connection to move axially away from the working head.
  • the power tool further includes an operating member disposed on the casing and movable axially along the connecting shaft, the operating member driving the connecting shaft to move axially.
  • the operating member is provided with an unlocking portion that abuts the limiting block, and the operating member drives the limiting block to move between the first position and the second position by the unlocking portion, and in the second Position, the operating member can drive the connecting shaft to move axially.
  • a part of the storage clip is housed in the casing, and another part is covered by the operating member and exposed as the operating member moves.
  • one of the operating member and the casing is provided with a guiding groove along the connecting shaft axial direction, and the other of the operating member and the casing is provided with a guide rail matched with the guiding groove, the operation The piece is axially moved relative to the casing along the connecting shaft by sliding the guide rail in the guiding groove.
  • the inside of the operating member is axially spaced along the connecting shaft, and is provided with a first protrusion and a second protrusion.
  • the one end of the connecting shaft away from the storage clip is provided with a fixing block, and the fixing block is opposite.
  • the connecting shaft is axially fixed and located between the first bump and the second bump, and the fixing block is axially movable between the first bump and the second bump.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the limiting block rotates about a pivot axis perpendicular to the axial direction of the connecting shaft.
  • the limiting block rotates about a pivot axis parallel to the axial direction of the connecting shaft.
  • the limiting block linearly moves in a direction perpendicular to the axial direction of the connecting shaft.
  • one end of the connecting shaft is coupled to the transmission mechanism to transmit a torque
  • the other end of the connecting shaft is connectable to the output shaft and is driven to rotate by the output shaft.
  • the limiting mechanism further comprises an elastic element that presses the limiting block toward the first position.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism coupled to the motor and , , , ,
  • a jewel-reverse pinion mechanism is coupled to the chassis, and a partition between the planetary gear reduction mechanism and the pinion mechanism is disposed.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • the invention also relates to a method of operating a power tool, the power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving hole for receiving the working head;
  • the mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the storage clip is disposed in the casing, and the storage clamp includes a storage compartment for accommodating a plurality of work heads arranged side by side a connecting shaft capable of being mated with one of the plurality of working heads through the receiving compartment and having one of the plurality of working heads located in the receiving hole and separated from one of the plurality of working heads A linear movement between the release positions;
  • the power tool further includes a limit mechanism disposed between the casing and the connecting shaft, the limit mechanism including a limit block operatively movable between the two positions, in the a position, the connecting shaft is in an operating position, the limiting block restricts movement of the connecting shaft away
  • the operating method includes the following steps: 1) operating the limiting block in the second position, releasing the limitation of the limiting block to the axial movement of the connecting shaft; 2) Move the connecting shaft in the release position; 3) Operate the storage clip and select the desired working head; 4) Move the connecting shaft to return to the working position.
  • the power tool further includes an operating member disposed on the casing and axially movable along the connecting shaft, the operating member driving the connecting shaft to move axially, and the operating member is disposed opposite to the limiting block
  • the unlocking block the operating member drives the limiting block to move between the first position and the second position by the unlocking block, the operating method further comprising: moving the limiting block in the second position by axially moving the operating member After that, continue to move the operating member and drive the connecting shaft in the release position.
  • the manner of operating the storage clip is to rotate the storage clip.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; connecting the shaft, and one of the plurality of working heads Aligning and driving for rotating one of the plurality of working heads; a transmission mechanism disposed between the motor and the connecting shaft and transmitting the rotational power outputted by the motor to the connecting shaft;
  • the storage clip being disposed in the casing,
  • the storage clip includes a receiving compartment for accommodating a plurality of juxtaposed working heads, the connecting shaft being capable of being engaged with a working position of one of the plurality of working heads through the receiving compartment and the plurality of , , , axial movement between the release positions of the working heads;
  • the power tool further includes a limiting mechanism disposed between the casing and the connecting shaft, the limiting mechanism comprising operably at two a limiting block for moving between positions, in the first position, the connecting shaft is in a working position, the limiting block restricting movement of the connecting shaft away from the working head,
  • the power tool further includes an operating member disposed on the casing and movable axially along the connecting shaft, the operating member driving the connecting shaft to move axially.
  • the operating member is provided with an unlocking portion that abuts the limiting block, and the operating member drives the limiting block to move between the first position and the second position by the unlocking portion, and in the second Position, the operating member can drive the connecting shaft to move axially.
  • a part of the storage clip is housed in the casing, and another part is covered by the operating member and exposed as the operating member moves.
  • one of the operating member and the casing is provided with a guiding groove along the connecting shaft axial direction, and the other of the operating member and the casing is provided with a guide rail matched with the guiding groove, the operation The piece is axially moved relative to the casing along the connecting shaft by sliding the guide rail in the guiding groove.
  • the inside of the operating member is axially spaced along the connecting shaft, and is provided with a first protrusion and a second protrusion.
  • the one end of the connecting shaft away from the storage clip is provided with a fixing block, and the fixing block is opposite.
  • the connecting shaft is axially fixed and located between the first bump and the second bump, and the fixing block is axially movable between the first bump and the second bump.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the limiting block rotates about a pivot axis perpendicular to the axial direction of the connecting shaft.
  • the limiting block rotates about a pivot axis parallel to the axial direction of the connecting shaft.
  • the limiting block linearly moves in a direction perpendicular to the axial direction of the connecting shaft.
  • the power tool further includes an output shaft for connecting the working head, one end of the connecting shaft is coupled to the transmission mechanism for transmitting torque, and the other end of the connecting shaft is connectable with the output shaft The working head is driven to rotate by the output shaft.
  • the limiting mechanism further comprises an elastic element that presses the limiting block toward the first position.
  • a gear box is disposed in the casing, and the transmission mechanism is received in the gear box. ⁇ . , , ...
  • a gearbox cover is provided between the gear ⁇ and the storage clip.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • the invention also relates to a method of operating a power tool, the power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; a connecting shaft coupled to one of the plurality of working heads and used for driving the vehicle One of a plurality of working heads is rotated; a transmission mechanism is disposed between the motor and the connecting shaft and can transmit rotational power of the motor output to the connecting shaft; the storage clip is disposed in the casing, and the storage clip includes a plurality of storage bins of the working heads arranged side by side, the connecting shaft being capable of pivoting between a working position through the receiving compartment and one of the plurality of working heads and a releasing position separated from one of the plurality of working heads
  • the power tool further includes a limiting mechanism disposed between the casing and the connecting shaft, the limiting mechanism including a limiting block operatively movable between the two positions, in the first position, the The connecting shaft is in a working position, the limiting block restricts the movement of the connecting shaft away
  • the operation method includes the following steps: 1) the operation limit block is in the second position, and the restriction of the limit block on the axial movement of the connection shaft is released; 2) the moving connection shaft is released Position; 3) Operate the storage clip, select the desired work head; 4) Move the connecting shaft back to the working position.
  • the power tool further includes an operating member disposed on the casing and axially movable along the connecting shaft, the operating member driving the connecting shaft to move axially, and the operating member is disposed opposite to the limiting block
  • the unlocking block the operating member drives the limiting block to move between the first position and the second position by the unlocking block, the operating method further comprising: moving the limiting block in the second position by axially moving the operating member After that, continue to move the operating member and drive the connecting shaft in the release position.
  • the operating method further includes: after the moving operation member drives the connecting shaft to be in the releasing position, a part of the storage clip is exposed as the operating member moves.
  • the limiting mechanism further includes an elastic element that presses the limiting block to the first position
  • the operating method further includes: after the connecting shaft returns to the working position, the limiting block is elastically pressed and returned To the first position.
  • the invention has the beneficial effects that: the power tool of the invention can effectively limit the movement of the connecting shaft during the working process, thereby ensuring high reliability.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; connecting the shaft, mating with one of the plurality of working heads Driving a rotation of one of the plurality of working heads; a transmission mechanism disposed between the motor and the connecting shaft and transmitting the rotary power outputted by the motor to the connecting shaft;
  • the storage clip being disposed in the casing, the storage folder including a receiving compartment for accommodating a plurality of juxtaposed working heads, wherein the connecting shaft is capable of being engaged with a working position of one of the plurality of working heads through the receiving compartment and a releasing position separate from one of the plurality of working heads An axial movement therebetween;
  • the power tool further includes a blocking member disposed at one end of the storage clip, the blocking member being movable between two positions, wherein the connecting shaft is in a working position, the blocking member The connecting shaft is allowed to move axially, and in the second position, the connecting shaft is in a
  • a pressure plate is disposed between the storage clamp and the transmission mechanism, and a position of the pressure plate on the one of the receiving compartments is provided with a hole through which the connecting shaft passes, and the blocking member is disposed on the pressure plate and The holes are partially overlapped.
  • the blocking member is a U-shaped spring axially fixed to the pressing plate, and the U-shaped spring is elastically deformable in a radial direction of the hole.
  • the blocking member is a spring piece, and one end of the elastic piece is axially fixed on the pressing plate, and the other end of the elastic piece partially overlaps the hole.
  • the connecting shaft is provided with an annular groove, and the annular groove axially corresponds to the position of the blocking member when the connecting shaft is in the working position.
  • the casing is slidably coupled with an operating member, a part of the storage clip is housed in the casing, and another portion is covered by the operating member and exposed as the operating member moves.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the operating member drives the connecting shaft to move axially.
  • the power tool further includes an output shaft for connecting the working head, one end of the connecting shaft is coupled to the transmission mechanism for transmitting torque, and the other end of the connecting shaft is connectable with the output shaft The working head is driven to rotate by the output shaft.
  • the storage clip is rotatably supported in the casing and located between the transmission mechanism and the output shaft.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • a power tool comprising: a motor disposed in the casing and outputting rotational power; an output shaft having an axially disposed receiving hole for receiving the working head;
  • the mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the storage clip is disposed in the casing, and the storage clamp includes a storage compartment for accommodating a plurality of work heads arranged side by side a connecting shaft capable of being mated with one of the plurality of working heads through the receiving compartment and having one of the plurality of working heads located in the receiving hole and separated from one of the plurality of working heads An axial movement between the release positions;
  • the power tool further comprising a blocking member disposed at one end of the storage clip, the blocking member being movable between two positions, wherein the connecting shaft is in a working position in the first position, The blocking member allows axial movement of the connecting shaft, and in the second position, the connecting shaft is in a released position, the blocking member
  • a pressure plate is disposed between the storage clamp and the transmission mechanism, and a position of the pressure plate on the one of the receiving compartments is provided with a hole through which the connecting shaft passes, and the blocking member is disposed on the pressure plate and The holes are partially overlapped.
  • the pressure plate is connected to the storage clip, and the number of the holes and the blocking member is equal to the number of the receiving compartments.
  • the blocking member is a U-shaped spring axially fixed to the pressing plate, and the U-shaped spring is elastically deformable in a radial direction of the hole.
  • the blocking member is a spring piece, and one end of the elastic piece is axially fixed on the pressing plate, and the other end of the elastic piece partially overlaps the hole.
  • the connecting shaft is provided with an annular groove, when the connecting shaft is in the working position, , ,
  • the annular groove corresponds axially to the position of the blocking member.
  • the casing is slidably coupled with an operating member, a part of the storage clip is housed in the casing, and another portion is covered by the operating member and exposed as the operating member moves.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the operating member drives the connecting shaft to move axially.
  • one end of the connecting shaft is coupled to the transmission mechanism to transmit a torque
  • the other end of the connecting shaft is connectable to the output shaft and is driven to rotate by the output shaft.
  • the storage clip is rotatably supported in the casing and located between the transmission mechanism and the output shaft.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • the invention has the beneficial effects that: the power tool of the invention can effectively prevent the working head from leaving the storage folder during the process of replacing the working head, thereby ensuring high reliability.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the working head support mechanism is disposed in the casing, and the work head support mechanism has a support for supporting the working head a plurality of accommodating spaces arranged side by side, wherein the working head supporting mechanism can be adjusted to a position in which one of the receiving spaces corresponds to the axial direction of the output shaft; , ⁇ , , , ⁇ , ⁇ , inside the casing, the connecting shaft can move between two positions.
  • the reversed glaze is mated with the working head and the working head is placed in the housing.
  • a working position in the hole in the first position, the reversed glaze is mated with the working head and the working head is placed in the housing.
  • the connecting shaft places the working head in a receiving position at the working head supporting mechanism and can be axially separated from the working head;
  • the power tool further includes a guide disposed adjacent to the working head supporting mechanism The returning device moves from the first position to the second position, and the working head is axially separated from the connecting shaft by the guiding device and held in the receiving position.
  • the guiding device comprises a supporting surface contacting the working head supporting mechanism and a guiding surface connected to the supporting surface, and the working head supporting mechanism is adjusted to drive the working head engaged with the connecting shaft under the action of the guiding surface Separated from the connecting shaft.
  • the working head supporting mechanism and the transmission mechanism are provided with a cover plate, and the supporting surface and the guiding surface are disposed on the cover plate.
  • the cover plate is provided with a stepped protrusion along a moving track whose working head is adjusted according to the position of the working head supporting mechanism, and the supporting surface and the guiding surface are disposed on the stepped protrusion.
  • the cover plate is provided with a through hole at a position corresponding to the connecting shaft, and the guiding surface is increased in height from the through hole.
  • the guiding surface is provided with two guiding surfaces on the movement track of the working head adjusted with the position of the working head supporting mechanism and distributed on both sides of the perforation.
  • the guiding surface is disposed around a circumference of the perforation.
  • the guiding surface is a sloped surface.
  • the inclined angle of the inclined surface with respect to the end face of the storage clip is between 10 degrees and 30 degrees.
  • the working head supporting mechanism is rotatably supported between the casing and the cover.
  • the connecting shaft is connected between the transmission mechanism and the output shaft, and the transmission mechanism transmits the rotational power outputted by the motor to the output shaft through the connecting shaft.
  • the invention has the beneficial effects that: the power tool of the invention separates the connecting shaft from the working head by a simple structure, and maintains the working head in the working head supporting mechanism, thereby ensuring high reliability. At the same time, the cost is reduced.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axial arrangement for accommodating a plurality of working heads a working chamber, the output shaft is rotatably supported on the casing and , , ,
  • the casing is fixed to the glaze;
  • the transmission mechanism is disposed between the motor and the output shaft to transmit the rotary power outputted by the horse to the output shaft;
  • the storage clamp is disposed in the casing, and the storage clamp includes a plurality of storage clamps a receiving compartment of the work head arranged side by side; a connecting shaft, the connecting shaft being capable of being engaged with a working position of one of the plurality of working heads through the receiving compartment and a releasing position separated from one of the plurality of working heads An axial movement; one end of the connecting shaft and the transmission mechanism can transmit a torque connection, and the other end of the connecting shaft can be coupled to the output shaft and drive the output shaft to rotate.
  • the power tool further includes an operating member slidably coupled to the casing, the operating member capable of axially moving the connecting shaft.
  • a part of the storage clip is housed in the casing, and another part is covered by the operating member and exposed as the operating member moves.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the storage clip is rotatably supported in the casing and located between the transmission mechanism and the output shaft.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • the invention has the beneficial effects that: the power tool of the invention reduces the torque transmission distance by connecting the shaft indirectly to rotate the working head, ensures high reliability, and is suitable for standard Work head, high versatility.
  • a power tool including: ⁇ , , ,
  • the storage clip is disposed in the casing, the storage clip includes a receiving compartment for accommodating a plurality of working heads arranged side by side; and a connecting shaft capable of working through the receiving compartment and the plurality of working One of the heads is mated with one of a plurality of working heads in an axial position of a working position within the receiving aperture and a release position separate from one of the plurality of working heads; the power tool further comprising an active connection An operating member on the casing, the operating member being movable between two positions, wherein the connecting shaft is in a working position, and the operating member abuts against the casing and covers a portion of the storage clip In the second position, the connecting shaft is in a release position, and the operating member is
  • one of the operating member and the casing is provided with a guiding groove along the connecting shaft axial direction, and the other of the operating member and the casing is provided with a guide rail matched with the guiding groove, the operation The piece is axially moved relative to the casing along the connecting shaft by sliding the guide rail in the guiding groove.
  • the operating member drives the connecting shaft to move axially.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • one end of the connecting shaft is coupled to the transmission mechanism to transmit a torque
  • the other end of the connecting shaft is connectable to the output shaft and is driven to rotate by the output shaft.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • an upper portion of the casing is provided with an open portion, and a part of the storage clip is exposed from the open portion.
  • the invention has the beneficial effects that: the power tool of the invention is effectively sealed during the working process, and the movement of the operation connecting shaft is also realized by the operating member, and the operation is convenient.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the working head support mechanism is disposed in the casing, and the work head support mechanism has a support for supporting the working head a plurality of accommodating spaces arranged side by side, wherein the working head supporting mechanism can be adjusted to a position in which one of the receiving spaces corresponds to the axial direction of the output shaft;
  • the connecting shaft is disposed in the casing, and the connecting shaft can be between the two positions Moving to drive the working head in a working position in the receiving hole or in a receiving position of the working head supporting mechanism;
  • the transmission mechanism comprises a self-locking device for
  • the transmission mechanism includes a planetary gear reduction mechanism driven by a motor and a gear mechanism driven by a planetary gear reduction mechanism, and the self-locking device is disposed between the planetary gear reduction mechanism and the gear mechanism.
  • the self-locking device comprises an adapter disk connected to the gear reduction mechanism and used to drive the gear mechanism, and a fixed disk fixedly connected to the casing for connecting the adapter plate and the fixed disk
  • An intermediate transmission mechanism that realizes a one-way transmission.
  • the planetary gear reduction mechanism comprises an output planet carrier, and the adapter disk is provided with an external spline, and the external spline is connected with an internal spline provided on the output planet carrier.
  • the external spline and the inner spline are loosely engaged in the circumferential direction.
  • the intermediate transmission mechanism includes at least one plane circumferentially disposed on an outer surface of the adapter disk, an inner circular surface of the fixed disk, and at least one roller between the plane and the inner circular surface of the fixed disk column.
  • the output planet carrier comprises a plurality of legs extending between the plane and the inner circular surface, the rollers being located between two adjacent legs.
  • the fixing plate has a protrusion on the outer surface thereof for fixed connection with the housing.
  • the gear mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear for driving the output shaft, and a second gear meshing with the first gear and the third gear at the same time.
  • the connecting shaft is connected between the transmission mechanism and the output shaft, and the transmission mechanism passes ,
  • the reversed glaze transmits the rotational power of the motor output to the output shaft.
  • the power tool of the present invention adapts the power tool to various modes by providing a self-locking device, which is convenient for the operator to use in various occasions.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the working head support mechanism is disposed in the casing, and the work head support mechanism has a support for supporting the working head a plurality of accommodating spaces arranged side by side, wherein the working head supporting mechanism can be adjusted to a position in which one of the receiving spaces corresponds to the axial direction of the output shaft;
  • the connecting shaft is disposed in the casing, and the connecting shaft can be between the two positions Moving to drive the working head in a working position in the receiving hole or in a receiving position of the working head supporting mechanism;
  • the connecting shaft has a working end for mating the working head and a supporting end opposite to the working end, the power tool Also included is a support member for axially opposing the
  • the support member is axially fixed to the support end, and the support end is rotatably supported on the support member.
  • the connecting shaft is axially movable
  • the power tool further includes an operating member coupled to the casing and operable to drive the movement of the connecting shaft.
  • the operating member is coupled to the support member, and the operating member drives the connecting shaft through the supporting member.
  • the operating member moves axially along the connecting shaft for at least two strokes, and in the first stroke, the operating member drives the connecting shaft to move together; in the second stroke, the The connecting shaft is fixed relative to the casing, and the operating member moves relative to the casing.
  • the operating member is axially fixed with a first bump and a second bump on both sides of the supporting member along the connecting shaft, and the supporting member can be in the first bump and the second bump.
  • the shaft moves axially along the connecting shaft.
  • the support element is a square element.
  • the operating member is fixedly provided with a protrusion extending into the middle of the square element, and the protrusion is movable between the two sides of the square element with respect to the connecting shaft axial direction. , , ,
  • the power tool further includes a limiting block disposed between the casing and the connecting shaft, the limiting block being operatively movable between two positions, wherein in the first position, the limiting block is The support member abuts and limits movement of the coupling axially away from the working head. In the second position, the limiting block separates from the support member and allows the coupling to move axially away from the working head.
  • the connecting shaft is connected between the transmission mechanism and the output shaft, and the transmission mechanism transmits the rotational power outputted by the motor to the output shaft through the connecting shaft.
  • the invention has the beneficial effects that: the power tool of the invention reduces the friction between the working head and the connecting shaft or the connecting shaft and the supporting member by rotating the contact point of the support point, thereby ensuring a longer tool. The service life, while reducing costs.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism is disposed between the motor and the output shaft and can transmit the rotary power outputted by the motor to the output shaft;
  • the working head support mechanism is disposed in the casing, and the work head support mechanism has a support for supporting the working head a plurality of accommodating spaces arranged side by side, wherein the working head supporting mechanism can be adjusted to a position in which one of the receiving spaces corresponds to the axial direction of the output shaft;
  • the connecting shaft is disposed in the casing, and the connecting shaft can be between the two positions Moving to drive the working head in a working position in the receiving hole or in a receiving position of the working head supporting mechanism;
  • the transmission mechanism comprises a planetary gear reduction mechanism driven by a motor and a gear mechanism driven by the planetary gear reduction mechanism, the planetary a gear reduction mechanism includes an output planet
  • the centers of rotation of the first gear, the second gear and the third gear are on the same straight line.
  • the center of rotation of the second gear is eccentrically disposed with respect to the center of rotation of the first gear and the third gear.
  • the eccentricity of the second gear with respect to the center of rotation of the first gear and the third gear is between 0.1 and 0.3 times the diameter of the first gear pitch circle.
  • the pitch circle diameter of the first gear is smaller than the output shaft rotation axis to the motor rotation axis ,
  • the pitch circle diameter of the second gear is smaller than the pitch circle diameter of the first gear.
  • the pitch circle diameter of the first gear is between 1.1 and 1.5 times the diameter of the index circle of the second gear.
  • the transmission of the first gear to the second gear is a speed increasing transmission
  • the transmission of the second gear to the third gear is a speed reduction transmission
  • the gear ratio of the first gear to the third gear is 1:1.
  • the connecting shaft is connected between the third gear and the output shaft, and the third gear transmits the rotational power outputted by the motor to the output shaft through the connecting shaft.
  • the present invention has the beneficial effects that the power tool of the present invention ensures high reliability in the transmission process by properly setting the gear mechanism, and the compact structure ensures the miniaturization of the tool.
  • a power tool a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving hole for accommodating the working head, a cross section of the working head shank is a regular polygon; a transmission mechanism is disposed between the motor and the output shaft and can transmit rotational power outputted by the motor to the output shaft; the receiving hole is provided with a torque transmitting portion and a correction portion
  • the torque transmitting portion is at least one radial protrusion, and the at least one radial protrusion abuts against one of the working heads and restricts rotation of the working head relative to the output shaft, and the correcting portion is disposed in the receiving portion a bevel in the hole, the working head is in contact with the inclined surface and drives the output shaft or the working head to rotate under the action of the inclined surface to
  • the radial protrusion extends axially along the output shaft and is coupled to the slope.
  • the radial protrusions are provided with twelve, and are evenly distributed along the circumferential direction of the output shaft.
  • the radial protrusion is at least one of a donut shape inscribed in the receiving hole.
  • the end of the receiving hole adjacent to the inclined surface is further provided with a guiding portion, wherein the guiding portion is an inner step having an inner diameter larger than the inner diameter of the receiving hole, and the height of the inner step in the axial direction is equal to the height of the inclined surface in the axial direction. .
  • the receiving hole is further provided with a sinking groove opposite to the radial protrusion, and the sinking groove has a bottom surface and two side faces connected to the receiving hole, and the two side faces are inclined along the circumferential direction.
  • the sinking groove and the inner step are axially communicated along the output shaft.
  • the power tool further includes a storage clip disposed in the casing, the storage clamp includes a receiving compartment for accommodating a plurality of working heads arranged side by side, the connecting shaft can be worn An axial movement between a working position that is mated with one of the plurality of working heads and a released position that is separate from one of the plurality of working heads.
  • one end of the connecting shaft is coupled to the transmission mechanism for transmitting torque, and the other end is connectable to the output shaft and drives the output shaft to rotate.
  • the power tool further includes an operating member slidably coupled to the casing, the operating member capable of axially moving the connecting shaft.
  • a part of the storage clip is housed in the casing, and another part is covered by the operating member and exposed as the operating member moves.
  • the casing is divided into a motor portion provided with a motor along the axial direction of the connecting shaft, and a transmission portion of the transmission mechanism is provided, and a storage portion of the storage clip is provided.
  • a motor portion provided with a motor along the axial direction of the connecting shaft
  • a transmission portion of the transmission mechanism is provided
  • a storage portion of the storage clip is provided.
  • the storage clip is rotatably supported in the casing and located between the transmission mechanism and the output shaft.
  • a gear box is disposed in the casing, the transmission mechanism is received in the gear box, and a gear box cover is disposed between the gear box and the storage clamp.
  • the storage clip is rotatably supported between the casing and the gear case cover.
  • the transmission mechanism includes a planetary gear reduction mechanism connected to the motor and a pinion mechanism connected to the connecting shaft, and the gear box is disposed between the planetary gear reduction mechanism and the pinion mechanism Separator.
  • the pinion mechanism includes a first gear coupled to the planetary gear reduction mechanism, a third gear coupled to the connecting shaft, and a second gear meshing with both the first gear and the third gear.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; an output shaft having an axially disposed receiving operation a receiving hole of the head, the working head has a torque receiving portion having a polygonal cross section; a transmission mechanism disposed between the motor and the output shaft and transmitting the rotational power outputted by the motor to the output shaft; the working head supporting mechanism is disposed on the In the casing, the working head supporting mechanism has a plurality of accommodating spaces arranged side by side for supporting the working head; the connecting shaft is disposed in the casing and enables the working head to be , a working position in the receiving hole or a receiving position of the working head supporting mechanism; the receiving hole includes a torque transmitting portion and a correcting portion, the torque transmitting portion being capable of restricting rotation of the working head relative to the output shaft, the output An elastic pressing device is disposed on the shaft, and the elastic pressing device at least partially protrudes into the correction portion
  • the torque transmitting portion includes at least one radial projection that abuts against the torque receiving portion and restricts rotation of the working head relative to the output shaft.
  • the torque transmitting portion includes twelve radial protrusions that are respectively hooked, the twelve radial protrusions contacting the torque receiving portion and restricting rotation of the working head relative to the output shaft, the elasticity
  • the portion of the pressing device that projects into the correction portion is aligned with the axially extending line of the two adjacent radial projections of the twelve radial projections.
  • the torque transmitting portion includes six radial protrusions, and the six radial protrusions are six corners of a twelve-corner star with diametrically opposite hooks, and the elastic pressing device A portion extending into the correction portion is aligned with an axially extending line of one of the six radial projections.
  • each of the two radial protrusions of the six radial protrusions is transitioned by a circular arc.
  • the torque transmitting portion is a regular polygon whose cross section matches the cross section of the torque receiving portion, and the portion of the elastic pressing device that extends into the correcting portion and extends in at least one side of the torque transmitting portion Face alignment.
  • a cross section of the torque transmitting portion and a cross section of the torque receiving portion are a regular hexagon.
  • the elastic pressing means includes a pressing member partially extending into the correcting portion and an elastic member, and the elastic member biases the pressing member radially inward along the output shaft.
  • the elastic member is a C-shaped elastic piece disposed around the output shaft, and the pressing member is disposed at two sides of the C-shaped elastic piece opening.
  • the elastic member is an elastic piece disposed axially along the output shaft, one end of the elastic piece is fixed with respect to the casing, and the other end of the elastic piece is biased with the pressing portion.
  • the elastic pressing device comprises an elastic member, and the elastic member has a pressing portion extending into the correcting portion, and the pressing portion is capable of being between the free state and the biased state of the elastic member
  • the output shaft moves in a radial direction.
  • the elastic element comprises at least one C-shaped wire disposed around the output shaft, and the 4 civil pressure portions are disposed on both sides of the C-shaped wire opening. , ,
  • the C-shaped wires are disposed in two axially spaced along the output shaft.
  • the two pressing portions of the two C-shaped wires are arranged offset in the circumferential direction.
  • the elastic member is a spring piece disposed axially along the output shaft, one end of the elastic piece is fixed relative to the casing, and the pressing portion is disposed at the other end of the elastic piece.
  • the connecting shaft is connected between the transmission mechanism and the output shaft, and the transmission mechanism transmits the rotational power outputted by the motor to the output shaft through the connecting shaft.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; an output shaft having an axially disposed receiving operation a receiving hole of the head, the working head has a torque receiving portion having a polygonal cross section; a transmission mechanism disposed between the motor and the output shaft and transmitting the rotational power outputted by the motor to the output shaft; the working head supporting mechanism is disposed on the In the casing, the working head supporting mechanism has a plurality of accommodating spaces arranged side by side for supporting the working head; the connecting shaft is disposed in the casing and can position the working head in a working position in the receiving hole or in the working head a receiving position of the supporting mechanism; the output shaft is provided with a receiving groove that is in radial communication with the receiving hole, and the receiving groove receives a locking member that at least partially protrudes into the receiving hole, and the output shaft can Moving axially between a first position and a second position, wherein in
  • the power tool further includes a resilient member that presses the output shaft toward the second position.
  • the output shaft is externally fixed with a limiting member relative to the casing, and the locking member is adjacently disposed with a locking portion and a releasing portion that cooperate with the locking member, in the first In position, the locking member is engageable with the release portion, and in the second position, the locking member is engaged with the locking portion.
  • the elastic element is sleeved on the output shaft and axially located between the output shaft and the limiting member.
  • the connecting shaft is connected between the transmission mechanism and the output shaft, and the transmission mechanism transmits the rotational power outputted by the motor to the output shaft through the connecting shaft.
  • the receiving slot includes a first receiving slot and a second receiving slot that are axially spaced apart along the output shaft
  • the locking component includes a first locking component received in the first receiving slot and received in the second a second locking member in the receiving groove, in the first position, the first locking member allows the working head to rotate relative to the output shaft, the second locking member allows the connecting shaft to rotate relative to the output shaft; Position, the first locking member restricts rotation of the working head relative to the output shaft, and the second locking member limits the connecting shaft relative to The output glaze rotates.
  • the connecting shaft is provided with a magnet at one end of the output shaft.
  • the working head support mechanism is rotatably supported between the output shaft and the transmission mechanism.
  • the casing is provided with an operating member, and the operating member is operative to axially move the connecting shaft to position the working head in the working position or the receiving position.
  • the operating member is movably coupled to the casing, and the operating member is axially movable relative to the casing along the output shaft.
  • the utility model has the beneficial effects that: the power tool of the invention can smoothly enter the output shaft during the replacement of the working head by a simple structure, thereby ensuring high reliability and reducing the reliability. cost.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; connecting the shaft, mating with one of the plurality of working heads Driving a rotation of one of the plurality of working heads; a transmission mechanism disposed between the motor and the connecting shaft and transmitting the rotational power outputted by the motor to the connecting shaft; the storage clip being partially received in the casing,
  • the storage clip includes a receiving compartment for accommodating a plurality of juxtaposed working heads, the connecting shaft being detachable from a working position that is mated with one of the plurality of working heads through the receiving compartment and separated from one of the plurality of working heads The axial movement of the release position; the housing is provided with an open portion, and the storage clip can be removed from the casing through the open portion when the connecting shaft is in the release position.
  • the power tool further includes an operating member disposed on the casing, the operating member capable of axially moving the connecting shaft together, and another portion of the storage clip being covered by the operating member and operating The pieces move to reveal.
  • the inner wall of the casing is provided with a supporting rib extending axially along the connecting shaft, and the storage clip is rotatably supported on the supporting rib.
  • the casing is provided with an opening diametrically opposite to the open portion.
  • the casing is mounted with an elastic piece that closes the opening.
  • the elastic piece is a rubber cushion.
  • the opening is provided with a button that is movable in the radial direction relative to the connecting shaft.
  • the storage clip is disposed adjacent to the end surface of the transmission mechanism and has a plurality of circumferential sections along the storage clip. ⁇ , ⁇ _ , ( A , ⁇ A ⁇ ,
  • the casing is provided with an elastic positioning member capable of cooperating with one of the plurality of positioning grooves, the elastic positioning member is disposed at a bottom of the casing and radially opposite to the open portion position.
  • At least one of the plurality of positioning grooves communicates with a circumferential surface of the storage clip along a radial direction of the storage clip.
  • the power tool further includes an output shaft, the output shaft has an axially disposed receiving hole for receiving the working head, the working head handle has a regular polygonal cross section, and the connecting shaft and the output shaft Connect and drive the output shaft to drive the working head to rotate.
  • the casing is provided with a gear box, and the transmission mechanism is housed in the gear box, and the diameter of the storage clip is smaller than the radial dimension of the gear box.
  • the utility model has the beneficial effects that: the working head storage clip of the power tool of the invention can be directly removed from the casing without using a tool, the operation is simple, and the work head is replaced quickly, thereby working efficiency high.
  • Another object of the present invention is to provide a power tool that is simple to operate and efficient.
  • a storage clip for accommodating a working head comprising a main body, the main body having an axis of rotation, and the main body is provided with a plurality of receiving bodies for accommodating the working head a plurality of receiving compartments are parallel to the rotation axis and are hooked around the rotation axis, the main body has an outer peripheral wall surrounding the plurality of receiving compartments, and the outer peripheral wall is provided with different working heads
  • the identification device corresponds to the position of the storage bin.
  • the identification means comprises text, symbols or graphics representing a different head shape or a combination thereof.
  • the identification means comprises text, symbols or graphics representing a different work head model or a combination thereof.
  • the identification device is fixed to the outer peripheral wall of the main body by one of printing, molding, inlaying or pasting.
  • the outer peripheral wall of the main body is provided with a plurality of projections or recesses parallel to the axial direction of the main body.
  • the identification device is located at one end of the outer peripheral wall with respect to the main body, and the protrusion or the groove is located at the other end of the outer peripheral wall with respect to the main body axial direction.
  • the identification device is removably mounted on an outer peripheral wall of the main body. , ,
  • the end surface of the main body is provided with a plurality of positioning slots corresponding to the plurality of receiving compartments.
  • any one of the plurality of positioning grooves communicates with the outer peripheral wall of the main body in a radial direction of the main body.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; and an output shaft having an axially disposed receiving body for receiving a transmission mechanism disposed between the motor and the output shaft and transmitting the rotary power outputted by the motor to the output shaft;
  • the connecting shaft is disposed in the casing and operable to position the working head in a working position in the receiving hole;
  • the power tool further includes a storage clip as previously described, and the connecting shaft is also operable to position the working head in a receiving position within the storage clip.
  • a storage clip for accommodating a work head comprising a main body, the main body having an axis of rotation, and the main body is provided with a plurality of storage work a receiving compartment of the head, the plurality of receiving compartments being parallel to the rotation axis and hooked around the rotation axis, the body having an outer peripheral wall surrounding the plurality of receiving compartments, the peripheral wall being at least partially transparent Made of materials.
  • the portion of the peripheral wall that closes the plurality of receiving compartments is made of a transparent material.
  • the transparent portion made of a transparent material is located at one end of the body in the axial direction.
  • the length of the transparent portion along the axial direction of the body is less than one-half of the length of the body.
  • the transparent portion is detachably mounted on the main body.
  • the transparent portion is annular.
  • the peripheral wall is entirely made of a transparent material.
  • the body is entirely made of a transparent material.
  • the outer peripheral wall of the main body is provided with a plurality of projections or recesses parallel to the axial direction of the main body.
  • the end surface of the main body is provided with a plurality of positioning slots corresponding to the plurality of receiving compartments.
  • any one of the plurality of positioning grooves communicates with the outer peripheral wall of the main body in a radial direction of the main body.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; an output shaft having an axially disposed receiving operation a receiving hole of the head; a transmission mechanism, disposed between the motor and the output shaft and capable of transmitting the motor , ⁇ ,
  • the rotary power is transmitted to the output shaft;
  • the connecting shaft is disposed in the casing and can be configured to position the working head in a working position in the receiving hole;
  • the power tool further includes a storage clip as described above, the connection
  • the shaft is also operable to position the working head in a stowed position within the storage clip.
  • a storage clip for accommodating a work head comprising a main body, the main body having an axis of rotation, and the main body is provided with a plurality of storage work a receiving compartment of the head, the plurality of receiving compartments being parallel to the rotation axis and hooked around the rotation axis, the body having an outer peripheral wall surrounding the plurality of receiving compartments, wherein: the peripheral wall A viewing window is provided, the viewing window extending from the end of the outer peripheral wall along the axial direction of the main body, the viewing window corresponding to the position of the receiving compartment and in radial communication with the receiving compartment.
  • the length of the viewing window along the axial direction of the body is less than one-half of the length of the body.
  • the length of the viewing window along the axial direction of the main body is 0.3 to 0.4 times the length of the main body.
  • the width of the viewing window along the circumferential direction of the main body is 0.7 to 0.9 times the diameter of the receiving compartment.
  • the main body is provided with a through hole concentric with the center of rotation of the main body.
  • the outer peripheral wall of the main body is provided with a plurality of projections or recesses parallel to the axial direction of the main body.
  • the other end surface of the main body opposite to the viewing window is provided with a plurality of positioning slots corresponding to the plurality of receiving compartments.
  • any one of the plurality of positioning grooves communicates with the outer peripheral wall of the main body in a radial direction of the main body.
  • a power tool comprising: a casing; a motor disposed in the casing and outputting rotational power; an output shaft having an axially disposed receiving operation a receiving hole of the head; a transmission mechanism disposed between the motor and the output shaft and transmitting the rotary power outputted by the motor to the output shaft; the connecting shaft disposed in the casing and operable to position the working head in the receiving hole
  • the power tool further includes a storage clip as previously described, and the connecting shaft is further operable to position the working head in a receiving position within the storage clip.
  • the storage clip of the present invention can quickly identify the type of the working head installed in the corresponding storage compartment by the identification device, the transparent part or the viewing window, and is convenient for the operator to use.
  • the power tool of the invention is equipped with the above-mentioned storage clip, and can be quickly selected when replacing different working heads, thereby achieving high work efficiency.
  • FIG. 1 is a cross-sectional view showing a power tool according to a preferred first embodiment of the present invention in an operating state.
  • Figure 2 is a perspective exploded view of the power tool of Figure 1.
  • Figure 3 is a cross-sectional view of the power tool of Figure 1 taken along the ⁇ - ⁇ line.
  • FIG. 4 is a cross-sectional view showing another embodiment of the pinion mechanism of the power tool of FIG.
  • Figure 5 is a cross-sectional view showing a preferred second embodiment of the power tool of the present invention in a state in which the working head is replaced.
  • Figure 6 is an exploded perspective view of the self-locking device portion of the power tool of Figure 5.
  • Figure 7 is a cross-sectional view taken along line F-F of Figure 5.
  • Figure 8 is a reference diagram of the state of use of the self-locking device in Figure 7 (in this case, the output planet carrier rotates counterclockwise).
  • Figure 9 is a reference view of the state of use of the self-locking device of Figure 7 (when the adapter disk is rotated clockwise).
  • Figure 10 is a perspective view of the slider of the power tool of Figure 1.
  • Figure 11 is a schematic view of the first embodiment of the limit mechanism of the power tool of Figure 1, in which the limit mechanism is in a locked state.
  • Figure 12 is a right side view of the limit mechanism of the power tool of Figure 11.
  • Figure 13 is similar to Figure 12, in which the limit mechanism is in an unlocked state.
  • Figure 14 is a schematic view of the second embodiment of the limit mechanism of the power tool of Figure 1, in which the limit mechanism is in a locked state.
  • Figure 15 is similar to Figure 14, in which the limit mechanism is in an unlocked state.
  • Figure 16 is a schematic view of the third embodiment of the limit mechanism of the power tool of Figure 1, in which the limit mechanism is in a locked state.
  • Figure 17 is similar to Figure 16, in which the limit mechanism is in an unlocked state.
  • Figure 18 is a perspective view of the front case of the power tool of Figure 5.
  • Figure 19 is a schematic illustration of another embodiment of a removable cartridge for a power tool of the present invention.
  • Figure 20 is a schematic illustration of yet another embodiment of a removable cartridge for a power tool of the present invention.
  • Figure 21 is a perspective view of a first embodiment of a preferred storage clip of the present invention.
  • Figure 22 is a front elevational view of the storage clip of Figure 21.
  • Figure 23 is a cross-sectional view taken along line ⁇ - ⁇ in Figure 22.
  • Figure 24 is a schematic view showing a structural form of the identification device in the second embodiment of the preferred storage clip of the present invention.
  • Figure 25 is a schematic illustration of another configuration of the identification device of the second embodiment of the preferred storage clip of the present invention. , ⁇ , , ⁇ ,
  • m 26 is a schematic view of a structural form in which the storage clip is transparent in the third embodiment of the preferred storage clip of the present invention.
  • Figure 27 is a schematic illustration of another structural form in which the storage clip is transparent in a third embodiment of the preferred storage clip of the present invention.
  • Figure 28 is a schematic illustration of the first embodiment of the restriction head retracting with the connecting shaft when the power tool is replaced with the working head of Figure 1.
  • Figure 29 is a schematic view of the blocking member of Figure 28 in a position permitting movement of the connecting shaft.
  • Figure 30 is a schematic view of the blocking member of Figure 28 in a position to restrict the retraction of the working head.
  • Figure 31 is a schematic illustration of a second embodiment of the restriction head retracting with the connecting shaft when the power tool is replaced with the working head of Figure 1.
  • Figure 32 is a schematic view of the blocking member of Figure 31 in a position permitting movement of the connecting shaft.
  • Figure 33 is a schematic view of the blocking member of Figure 31 in a position where the working head is retracted.
  • Figure 34 is a schematic illustration of a third embodiment of the restriction head retracting with the connecting shaft when the power tool is replaced with the working head of Figure 1.
  • Figure 35 is a schematic illustration of a fourth embodiment of the restriction head retracting with the connecting shaft when the power tool is replaced with the working head of Figure 1.
  • Figure 36 is a schematic view of the working principle of the working head of Figure 35 being restricted to retreat with the connecting shaft, wherein the connecting shaft drives the working head back to the storage clip and the connecting shaft leaves the storage clip.
  • Figure 37 is similar to Figure 36 in which the storage clip is rotated and the working head abuts the guide surface.
  • Figure 38 is similar to Figure 36, in which the storage clip rotates and the working head is axially separated from the connecting shaft by the guiding surface.
  • Figure 39 is a schematic illustration of a first embodiment of the output shaft of the power tool of Figure 1.
  • Figure 40 is a front elevational view of the output shaft of the power tool of Figure 39.
  • Figure 41 is a schematic illustration of a second embodiment of the output shaft of the power tool of Figure 1.
  • Figure 42 is a front elevational view of the output shaft of the power tool of Figure 41.
  • Figure 43 is a schematic illustration of a third embodiment of the output shaft of the power tool of Figure 1.
  • Figure 44 is a front elevational view of the output shaft of the power tool of Figure 43.
  • Figure 45 is a cross-sectional view showing the power tool in a preferred third embodiment of the present invention in an operating state.
  • Figure 46 is a partially exploded perspective view of the power tool of Figure 45.
  • Figure 47 is a partial cross-sectional view taken along line Q-Q of Figure 45.
  • 48 is a schematic cross-sectional view of the working head of the power tool of the present invention.
  • Figure 49 is a right side elevational view of the output shaft portion of the power tool of Figure 45 with the working head not yet entering the output shaft.
  • Figure 50 is similar to Figure 49, in which the working head has just entered the correction section of the output shaft.
  • Figure 5 1 is similar to Figure 49, in which the working head rotates relative to the output shaft under the action of an elastic pressing device.
  • Figure 52 is similar to Figure 49 with the working head entering the torque transmitting portion of the output shaft.
  • Figure 53 is a schematic illustration of the torque transmitting portion of the output shaft in a preferred alternative embodiment of the present invention.
  • Fig. 54 is a view showing the formation of the torque transmitting portion of the output shaft of Fig. 53, in which two squares are relatively rotated by 30 degrees.
  • Figure 55 is a right side elevational view of the output shaft portion of Figure 53 with the working head not yet entering the output shaft.
  • Fig. 56 is similar to Fig. 55, in which the working head has just entered the correction portion of the output shaft.
  • Figure 57 is similar to Figure 55 in which the working head enters the torque transmitting portion of the output shaft.
  • Figure 58 is a schematic illustration of the torque transmitting portion of the output shaft in a preferred embodiment of the present invention.
  • Figure 59 is a cross-sectional view showing a preferred power tool of the present invention using the output shaft of Figure 58 in a state in which the head is replaced.
  • Figure 60 is a partial cross-sectional view taken along line R-R of Figure 59, in which the working head has not yet entered the output shaft.
  • Figure 61 is a right side view of the output shaft portion of Figure 58 with the working head just entering the correction portion of the output shaft.
  • Figure 62 is similar to Figure 61, in which the working head is rotated relative to the output shaft by the elastic pressing device.
  • Figure 63 is similar to Figure 61 with the working head entering the torque transmitting portion of the output shaft.
  • Figure 64 is a partial cross-sectional view showing the power tool in a preferred fourth embodiment of the present invention in an operating state.
  • Figure 65 is a partially exploded perspective view of the power tool of Figure 64.
  • Figure 66 is a partial cross-sectional view showing the power tool in a preferred fifth embodiment of the present invention in an operating state.
  • Figure 67 is a partial cross-sectional view showing the power tool in a preferred sixth embodiment of the present invention in an operating state. , ,
  • FIG. 68 is a cross-sectional view of the power tool in the preferred seventh embodiment of the present invention in an operating state, in which the working head has just entered the correction portion of the output shaft.
  • Figure 69 is similar to Figure 68 in which the working head passes over the first locking member.
  • Figure 70 is similar to Figure 68 in which the working head passes over the second locking member.
  • Figure 71 is similar to Figure 68 in which the connecting shaft passes over the first locking member.
  • Figure 72 is similar to Figure 68 in which the output shaft is reset and can drive the head to rotate.
  • Gear shaft 31 Planetary gear reduction mechanism 313.
  • Output planet carrier 3131 Leg 3181.
  • the power tool is a power screwdriver, which can be divided into a pneumatic screwdriver, a hydraulic screwdriver and an electric screwdriver according to different power sources.
  • the electric screwdriver also has a direct current and an alternating current.
  • the present invention preferably uses direct current.
  • a screwdriver is given as an example for specific explanation.
  • the DC electric screwdriver includes a casing 1, a motor 2, a battery 6, a transmission mechanism 3, a connecting shaft 51, a working head supporting mechanism, and an output shaft 4.
  • the casing 1 is assembled by two half-shells symmetrically symmetrical by screws (not shown) having a horizontal portion and a handle 11 portion disposed at an angle K to the horizontal portion.
  • the preferred angle K of the present invention is 100.
  • the degree is between 130 degrees, so that the grip handle 11 is more comfortable to operate.
  • a push button switch 7 is provided on the upper portion of the handle 1 1 portion, the battery 6 is fixed to the rear portion of the handle portion 11, and the transmission mechanism 3 is housed in the horizontal portion of the casing 1.
  • the battery 6 may be a lithium ion battery.
  • the lithium ion battery referred to herein is a general term for a rechargeable battery in which the negative electrode material is lithium. According to the positive electrode material, it can constitute many systems, such as “lithium manganese” batteries, “lithium iron” batteries, etc. .
  • the lithium ion battery is a lithium ion battery having a rated voltage of 3.6 V (volts).
  • the battery 6 may also be a battery type known to those skilled in the art such as nickel cadmium, nickel hydrogen or the like.
  • the transmission mechanism 3 includes a planetary gear reduction mechanism 31 and a pinion mechanism 30 driven by the motor 2 from the rear to the front (to the right side of the drawing), wherein the pinion mechanism 30 is connected to the connecting shaft 5 1 and passes through the connecting shaft 51 transmits the rotational motion of the motor 2 to the output shaft 4.
  • the working head here mainly refers to the ten-turn screwdriver head, the word screw head, the drill bit, etc., which are commonly used for electric screwdrivers, and moves axially through the working head supporting mechanism or leaves the working head by operating the connecting shaft 51.
  • the mechanism and adjusting the position of the work head support mechanism it is possible to quickly change the different work heads when the electric screwdriver is tightened or loosened.
  • the electric screwdriver can be divided into a motor portion D for setting the motor, a transmission portion C of the transmission mechanism 3, a storage portion for setting the storage clip, and the motor portion D, which is sequentially arranged from the rear to the front (the right side of the drawing is the rear). Set the output section of the output shaft.
  • the motor 2 in the preferred embodiment of the invention is a motor having a motor shaft 21 extending forwardly from the motor housing.
  • the motor is fixed in the casing 1
  • a gear box 22 is fixed in the casing 1 and located at the front of the motor
  • the gear box 22 is used for accommodating the planetary gear reduction mechanism 31 and the pinion mechanism 30 through the planetary gear reduction mechanism 3 1
  • a partition plate 221 is disposed between the pinion mechanism and the pinion mechanism 30 to separate the two
  • a gear box cover 223 is disposed between the gear box 22 and the work head support mechanism, thereby separating the transmission mechanism 3 from the work head support mechanism, that is,
  • the transmission mechanism 3 and the work head support mechanism are independent of each other.
  • the pinion mechanism 30 includes a first gear 301 that is torque-transportable with a planetary gear reduction mechanism 31 through a gear shaft 308, a third gear 303 coupled to the connecting shaft 51, and simultaneously meshed with the first gear 301 and the third gear 303.
  • the second gear 302 wherein the gear shaft 308 can be integrally provided with the first gear 301, the second gear 302 transmits the rotation of the first gear 301 to the third gear 303, and both ends of each gear are supported by the sleeve.
  • the middle portion of the partition plate 221 is provided with a hole through which the shaft of the first gear 301 passes, and the end surface of the partition plate 221 is provided with a groove for mounting the sleeve, and the rear sleeve supporting the pinion mechanism 30 is fixed on the partition plate 221,
  • the front bushing is fixed to the gear case cover 223, and the gear case cover 223 and the gear case 22 can be fixedly connected by screws, snaps, etc., so that the pinion mechanism 30 can be separated from the planetary gear reduction mechanism 31, and It is also possible to close both of them to prevent dust, powder, etc. from entering the inside of the transmission mechanism 3, and also to prevent leakage of lubricating oil.
  • the center lines of the first gear 301, the second gear 302, and the third gear 303 are disposed on the same straight line, and the transmission ratio from the first gear 301 to the third gear 303 is 1 in order to make the transmission smoother.
  • the first gear 301 to the second gear 302 are the speed increasing transmission
  • the second gear 302 to the third gear 303 are the speed reduction transmission.
  • the first gear 301 and the third gear 303 have the same diameter of the index circle.
  • the pitch circle diameter of the second gear 302 is smaller than the pitch circle diameter of the first gear 301 and the third gear 303, and the arrangement can ensure an optimal layout when the three gear centers are coaxial, and the occupied space is the smallest.
  • the electric screwdriver is relatively small, the smaller setting of the second gear 302 may require a smaller number of teeth, resulting in fewer teeth being meshed at the same time, under the strength of the transmission pair.
  • the second gear 302 can be eccentrically disposed with respect to the center of rotation of the first gear 301 and the third gear 303, thereby ensuring that the size of the second gear 302 is not too small, and three The size of the gears arranged side by side is not too large, and the transmission between the three gears can be ensured to be relatively stable.
  • the preferred eccentricity L is between 0.1 and 0.3 times the diameter of the first gear 301.
  • the pitch circle diameter of a gear 301 is between 1.1 and 1.5 times the diameter of the index circle of the second gear 302, ensuring high bearing capacity between the three gears, high efficiency, and long service life.
  • the provision of three gears allows the internal space of the tool to be more compact without affecting the aesthetics of the exterior.
  • the transmission mechanism 3 is not limited to the above-described form, and the transmission mechanism 3 may include only the planetary gear reduction mechanism 31, or only the pinion mechanism 30, or other rotary motion transmission mechanisms such as a ratchet mechanism, a turbine mechanism, and the like. Wait.
  • the planetary gear reduction mechanism 31 has a three-stage reduction system, and the motor shaft 21 extends to mesh with the planetary gear reduction mechanism 31.
  • the planetary gear reduction mechanism 31 transmits the rotational motion to the pinion mechanism 30, and the pinion mechanism 30 drives the connection shaft 51 to rotate.
  • the shaft 51 then drives the output shaft to rotate.
  • the transmission chain in the present embodiment is a motor-transmission mechanism-connecting shaft-output shaft, that is, the connecting shaft is a part of the transmission chain.
  • the speed reduction mechanism is composed of a three-stage planetary deceleration and a two-stage parallel shaft reduction system to obtain a desired output rotation speed.
  • the speed reduction mechanism may include only a two-stage planetary reduction system depending on the required output speed. Or other deceleration systems.
  • the planetary gear reduction mechanism 31 includes an output end carrier 313.
  • the electric screwdriver is provided with a self-locking device between the planetary gear reduction mechanism 31 and the pinion mechanism 30.
  • the self-locking device includes a fixed plate 321 , and a plurality of fixed pins 3211 are evenly disposed outside the circumference of the fixed disk 321 .
  • the leg 3211 is tightly coupled to the gear case 22 so that the fixed disk 321 is stationary with respect to the casing 1 and the gear case 22, and an inner circular surface 3212 is formed on the inner side of the circumference of the fixed disk 321 .
  • an adapter disk 322 is disposed, and a central portion of the adapter disk 322 is provided with a flat square hole 3222.
  • the gear shaft 308 is connected to the first gear 301 at one end, and the flat portion 3181 is disposed on the other end.
  • the adapter disk 322 and the gear shaft 308 pass through the flat hole 3222 and are flat.
  • the portion 3181 is integrally connected so as to be rotatable together with the gear shaft 308.
  • the connection method used therein may be a spline connection conventionally used by those skilled in the art and other connection alternatives that are conceivable.
  • the self-locking device further includes a plurality of legs 3131 protruding from the end of the output end carrier 313 toward the first gear 301, and the legs 3131 are fixedly disposed on the output end carrier 313.
  • a plurality of planes 3221 are formed on the outer circumference of the adapter disk 322, and a connecting portion is disposed on one end of the adapter disk 322 near the output end carrier 313.
  • the connecting portion is provided with spline teeth 3223, and the adapter disk 322 passes through the spline teeth.
  • the 3223 is loosely engaged with the output planet carrier 313. Between the fixed disk 321 and the adapter disk 322, a more specific position is that a roller 323 is disposed between the inner circular surface 3212 of the fixed disk 321 and the plane 3221 of the adapter disk 322, and the roller 323 abuts against the inner circular surface 3212. And plane 3221, and can scroll at the location.
  • the legs 3131 of the output planet carrier 313 are inserted between each of the rollers 323, that is, the legs 3131 are disposed between the inner circular surface 3212 of the fixed disk 321 and the outer circular surface of the adapter disk 322.
  • the leg 3131 and the inner circular surface 3212 of the fixed disk 321 and the adapter disk 322 are gap-fitted so that the leg 3131 can rotate around the center of the adapter disk 322.
  • the big end is moved, so the roller 323 can be pushed by the output planet carrier leg 3131, following the output end carrier 313, until the output end carrier 313 is in contact with the side of the spline tooth 3223 of the adapter disk 322.
  • the legs 3131 of the planet carrier and the rollers 323 drive the adapter disk 322 to rotate.
  • the rotational torque of the motor 2 is transmitted to the gear shaft 308 fixedly coupled to the adapter disk 322, and further transmitted to the first gear 301, which is transmitted to the output shaft through the second gear 302, the third gear 303, and the connecting shaft 51. 4, so that the output shaft 4 drives the working head 9 to rotate.
  • the 308 does not drive the output planet carrier bracket 41 to rotate, ie the gear shaft 308 is automatically locked, ie the rotary motion cannot be transmitted from the output shaft 4 to the output planet carrier 313.
  • the operator can choose to manually rotate the electric screwdriver to tighten the screw.
  • the motor 2 can be stopped by the push button switch 7.
  • the electric screwdriver is rotated to screw the screw in place, thereby avoiding the screw being electric Over-screw in mode to cause the screw to slip.
  • the electric screwdriver can be said to be a hand and electric screwdriver, which is easy to operate and easy to carry.
  • the self-locking device is disposed between the planetary gear reduction mechanism 31 and the pinion mechanism 30, and those skilled in the art can easily realize that the self-locking device can be realized at other positions between the motor 2 and the output shaft 4.
  • the structural form of the self-locking device is not limited to the above embodiment, and any self-locking device that can realize one-way transmission can be applied to the preferred electric screwdriver of the present invention.
  • a sliding cover 53 is slidably coupled to the casing 1, and the sliding cover 53 can axially move the connecting shaft 51.
  • the edge of the sliding cover 53 is provided with a guide rail 531, and the corresponding casing 1 is provided with a guiding groove 15, and the sliding cover 53 is mounted in the guiding groove 15 through its guide rail 531 to be axially slidable relative to the casing 1.
  • the commonly used standard working head shank has a regular hexagonal cross section, that is, the shank portion is formed as a torque receiving portion of the working head, and the output shaft 4 has an axially extending receiving hole 41, and the receiving hole 41 is disposed to be torque-dependent with the working head.
  • the force is matched with a hexagonal hole in which the working head is mounted to place the working head in the working position, thereby realizing the transmission of torque.
  • the working head can also be non-standard, that is, the cross section of the torque receiving portion is polygonal, and the corresponding receiving hole is disposed in a polygonal shape matching the torque receiving portion, and the torque can be transmitted.
  • the output shaft 4 is supported in the axial opening 131 of the front casing 13 by a bushing 40.
  • the bushing 40 provides radial support to the output shaft 4, and of course the radial support of the output shaft 4 can also be achieved by bearings.
  • the connecting shaft 51 of the present invention is also hexagonal, and the third gear 303 is provided with a hexagonal hole for mating with the connecting shaft 51 and transmitting the rotational power to the connecting shaft 51, so that the connecting shaft 51 is inserted into the output shaft 4 to drive the output.
  • the shaft 4 rotates, and then the working head 9 is rotated by the output shaft 4, so that the standard working head 9 can be used, and there is no need to open a hole for receiving the working head 9 on the connecting shaft 51, thereby avoiding the diameter of the connecting shaft 51 being excessively large to increase the whole machine. weight and volume. In this way, directly drive the work head 9 ,
  • Rotating is the output shaft, which shortens the torque transmission distance and makes the tool more reliable.
  • the above describes the way in which the connecting shaft indirectly drives the working head to rotate through the output shaft.
  • the connecting shaft directly drives the working head to rotate, that is, the connecting shaft directly with the working head.
  • the connecting shaft is only used to push the working head and drive the working head back to the storage clamp, that is to say the drive chain is the motor-transmission-output shaft, ie the connection
  • the shaft is not part of the drive train.
  • the connecting shaft 51 is a hexagonal shaft.
  • the connecting shaft 51 is axially fixed and provided with a fixing block 50.
  • the sliding cover 53 can be connected by connecting with the fixing block 50.
  • the shaft 51 moves.
  • the first protrusion 535 and the second protrusion 536 are axially spaced apart from each other along the connecting shaft 51. In the working state of the electric screwdriver, the first protrusion 535 is axially spaced from the fixed block 50 by a distance S.
  • the sliding cover 53 slides backward, that is, in the direction of the motor 2, and after sliding the distance S, the first protrusion 535 abuts against the fixed block 50, so that the sliding cover 53 drives the fixing block 50 to drive the connecting shaft 51 axially.
  • the second protrusion 536 is axially spaced from the fixed block 50 by a distance S, and when the sliding cover 53 slides forward, that is, slides in the direction of the output shaft 4, the distance S is slid. After that, the second protrusion 536 abuts the fixed block 50 axially, so that the sliding cover 53 drives the fixing block 50 to drive the connecting shaft 51 to move axially forward.
  • the front end of the connecting shaft 5 1 is provided with a magnet 51 1 for sucking the working head 9.
  • the operable sliding cover 53 drives the connecting shaft 51 through the working head supporting mechanism, and the working head 9 is connected to the shaft 5
  • the magnet 5 1 1 on the upper side is sucked, and is pushed away from the working head supporting mechanism by the connecting shaft 51 to enter the output shaft 4.
  • the sliding cover 53 to move the connecting shaft 51.
  • a ring groove around the outer circumference of the connecting shaft 51 can be provided, and the sliding cover 53 can be inserted into the ring groove through a pin or a wire ring and connected.
  • the shafts 5 1 are connected so as not to affect the rotation of the connecting shaft 51 or the movement of the connecting shaft 51 by the sliding cover 53.
  • a position of the rear end of the connecting shaft 5 1 adjacent to the fixing block 50 is provided with a limiting mechanism 8 for preventing the connecting shaft 51 from retreating.
  • the limiting mechanism 8 includes a pivotable limiting block 8 1 .
  • the torsion spring 83 of the stopper 81 is biased in the pivotal direction of the stopper 81.
  • One end of the limiting block 81 abuts against the fixing block 50, and the other end is mounted on the gear box 22 or the casing 1 through a pin shaft 82.
  • the axis of the pin shaft 82 is parallel to the axis of the connecting shaft 51, and the limiting block 8 1 It is possible to rotate around the pin 82 over a range of angles.
  • One end of the torsion spring 83 is fixed on the limiting block 81, and the other end is abutted on the gear box 22 or on the casing 1. , t , , L , , , , , , ,
  • the elastic force of the twisted yellow 83 holds the stopper 81 in the first position against the fixed block 50 (shown in Figs. 11 and 12).
  • a limiting mechanism 8 is provided in two, symmetrically distributed along the axis of the connecting shaft 51, so as to maintain the force balance and make the axial limit of the connecting shaft 51 more reliable.
  • the sliding cover 53 is provided with an unlocking block 532 matched with the limiting block 81.
  • the unlocking block 532 is provided with a slope 533.
  • the position block 81 rotates around the pin shaft 82 against the elastic force of the torsion spring 83 by the inclined surface 533 until the stopper block 81 is disengaged from the fixed block 50, and the fixed block 50 is unlocked, so that the stopper block 81 is in the allowable connection shaft 51.
  • the second position of the axial movement (shown in Figure 13).
  • the connecting shaft 51 continues to move axially, and the limiting block 81 is caught at both ends of the fixing block 50, at which point the working head can be replaced. It can be seen that the sliding distance S before the sliding cover 53 drives the connecting shaft 51 to move is the restriction that the limiting block 81 can cancel the axial movement of the connecting shaft 51, so that the distance S can be released as long as the movement of the sliding cover 53 is satisfied.
  • the block 81 can lock the axial movement of the connecting shaft 51. After the working head is replaced, the sliding cover 53 is moved forward, and the connecting shaft 51 and the fixing block 50 are also moved forward.
  • the inclined surface 533 on the unlocking block 532 is in contact with the side surface 813 of the limiting block 81 again and along with the front of the sliding cover 53.
  • the front end of the connecting shaft 51 extends into the output shaft 4 and is disposed on the connecting shaft 51.
  • the fixing block 50 at the rear end is axially abutted by the stopper 81, so that the axial movement of the connecting shaft 51 is restricted, that is, the connecting shaft 51 cannot be retracted, so that the use of the electric screwdriver is more reliable.
  • a second embodiment of the limiting mechanism 8 is different from the above-described limiting mechanism 8 in that the axis of the pin 82a is perpendicular to the axis of the connecting shaft 51, one end of the limiting block 81a.
  • the pin shaft 82a is pivotally connected, and the other end is formed in a hook shape and hooked on the fixing block 50, so that the fixing block 50 can also be restricted from moving backward, so that the limiting block 81a is in the first axial movement of the locking connecting shaft 51.
  • Location shown in Figure 14).
  • the slider 53 is moved such that the slope 533 on the unlocking block 532 comes into contact with the stopper 81a, and the stopper 81a rotates around the pin 82a under the guidance of the slope 533 and unlocks the fixing block 50, so that the stopper 81a is at A second position (shown in Figure 15) that allows axial movement of the connecting shaft 51 is permitted.
  • the working principle of the limiting mechanism 8a in this embodiment is the same as that of the first embodiment, and details are not described herein again.
  • the limiting mechanism 8b includes a limiting block 81b and a spring 83b.
  • the limiting block 81b is axially fixed relative to the casing 1, and the limiting block is 81b is linearly movable in a direction perpendicular to the axis of the connecting shaft 51, and one end of the spring 83b is received in the limit block , , , , ⁇ , ⁇ t
  • the other end is connected to the casing 1 or the gear box 22, and the spring 83b biases the limiting block 8 1b to maintain the first position in the axial direction against the fixed block 50 (shown in Fig. 16).
  • the locking of the axial movement of the fixed block 50 is released by the interaction of the inclined surface 533 disposed in the sliding cover 53 with the inclined surface 533.
  • the limiting block 81b linearly moves against the elastic force of the spring 83b.
  • the second position (shown in Fig. 17) for locking the connecting shaft 51 is released.
  • the inclination direction of the inclined surface 533 can be selected according to the direction in which the limiting block 81 b moves, such as the limiting block 81b moving in a horizontal direction perpendicular to the axis of the connecting shaft 51, the direction of the inclined surface 533 with respect to the axis of the connecting shaft 51
  • the plane formed by the vertical direction is inclined;
  • the limiting block 81 b moves in a vertical direction perpendicular to the axis of the connecting shaft 51, and the inclined surface 533 is inclined with respect to the direction of the connecting shaft axis and the plane formed by the horizontal direction;
  • the limiting block 8 1b Moving in a direction perpendicular to the horizontal direction perpendicular to the axis of the connecting shaft 5 1 , such that the limiting block 81 b has components in both horizontal and vertical directions, so that the oblique direction of the inclined surface 533 can have multiple choices,
  • the technician can easily think of it and will not go into details here.
  • the three embodiments of the above-mentioned limiting mechanism 8 are unlocked by the movement of the sliding cover 53 to release the axial movement of the limiting block 81, because the sliding cover 53 also drives the connecting shaft 5 1 axial direction. Moving, so that the slider 53 needs to move a certain distance first, that is, the locking of the axial movement of the connecting shaft 51 by the limiting block 81 is first released, and then the connecting shaft 51 is axially moved, and the sliding cover 53 internally drives the connecting shaft 51 to move.
  • the first protrusions 535 are axially spaced from the fixed block 50, and the axially spaced distances are determined by the angle of inclination of the slopes 533 and the maximum distance that the limiting block 81 and the fixed block 50 radially overlap.
  • the unlocking block 81 can be locked in the axial movement of the connecting shaft 51 without moving through the sliding cover 53, for example, it is connected to the limiting block 8 1 outside the casing 1 .
  • the knob is rotated to rotate or move against the spring force by rotating the knob; or a button or a button connected to the limiting block 81 is disposed outside the casing 1, and the limit can be driven by pushing the button or pressing the button.
  • the block 81 can be locked against the axial movement of the connecting shaft 51 by rotating or moving or the like against the spring force.
  • an elastic member may be disposed between the slide cover 53 and the casing 1 or the gear case 22.
  • the slide cover 53 When the slide cover 53 is retracted to the end position, it may be caught by the lock on the casing 1, and when the slide cover 53 is released, Automatically return to the working position under elastic force.
  • the fixing block 50 has a hollow shape
  • the connecting shaft 51 has a supporting end 512 connecting the fixing block 50
  • the supporting end 51 is arranged in a cylindrical shape
  • the fixing block 50 is provided.
  • One side is provided with a circular hole or a U-shaped hole
  • the supporting end 51 is rotatably supported on the fixing block 50 through a circular hole and a U-shaped hole, and the supporting end 512 protrudes into the hollow portion of the fixing block 50.
  • the annular groove is provided so that the dam can be assembled to limit the axial movement of the connecting shaft 51.
  • the diameter of the gusset 512 is preferably smaller than the diameter of the circumcircle of the hexagonal connecting shaft 51, which can reduce the volume of the fixing block 50 and thereby make the overall structure of the tool more compact.
  • the other side of the fixing block 50 opposite to the circular hole or the U-shaped hole abuts against the end of the supporting end 51, wherein the end of the supporting end 512 is formed in a conical shape, so that the contact between the connecting shaft 51 and the fixing block 50 is Point contact, because the electric screwdriver needs to axially press the working head 9 against the workpiece during the operation, so that the working head 9 is subjected to a reverse axial force, which is transmitted to the connecting shaft 5 1 A large force friction is generated between the connecting shaft 51 and the fixing block 50, and the point contact manner can reduce the friction and increase the service life of the connecting shaft 51.
  • both the connecting shaft 51 and the fixing block 50 can be made of metal to reduce the degree of wear between the connecting shaft 51 and the fixed block 50.
  • the fixing block 50 may be connected by a plurality of square hollow shapes to increase the strength, and in the present embodiment, it is preferable to use two or three square hollow shapes.
  • the fixing block 50 can also have other advantages, such as the rotatably supporting the connecting shaft 51 on the fixing block 50, without using bearing support, reducing the volume and cost of the tool; the side area of the fixing block 50 is large, and the convenience is limited.
  • the block 8 1 is opposite to the fixed block 50 to axially limit the connecting shaft 51. It is also convenient for the sliding cover 53 to move the connecting shaft 51 by abutting against the fixing block 50.
  • the hollow portion of the fixing block 50 can also slide.
  • the cover 53 has an idle stroke with respect to the connecting shaft 51 (that is, the sliding cover 53 moves and the connecting shaft 51 does not move with it), so that only one protrusion can be arranged on the sliding cover 53 to drive the connecting shaft 5 1 to move back and forth, thereby facilitating sliding.
  • the cover 53 operates the stopper 8 1 to lock and unlock the connecting shaft 51.
  • the casing 1 includes a front casing 13 connected to the front end thereof, a part of the working head supporting mechanism is housed in the front casing 13, and the other portion is covered by the sliding cover 53 to be exposed as the sliding cover 53 moves.
  • the preferred working head support mechanism of the present invention is a cylindrical storage clip 52, which is convenient for rotation and takes up a small space. Of course, it can also be arranged in a square shape, a triangular shape, a strip shape, a bracket shape or the like.
  • the slider 53 abuts against the front case 13, so that the storage clip 52 and the connecting shaft 51 can be closed.
  • a position of the connecting shaft 51 is provided on the gear box cover 223 at a position corresponding to the connecting shaft 51.
  • the gear box 22 has an arch 225 extending around the axis of the connecting shaft 51.
  • the arch 225 can be coupled to the gear box 22.
  • the body arrangement may also be separately provided, and the connecting shaft 51 may be partially closed by providing the arch 225, and when the electric screwdriver performs the replacement of the working head 9, the sliding cover 53 is moved to the last end. L , ,
  • the position of the connecting shaft 5 1 is not exposed, which prevents dust, powder, etc. from entering the inside of the tool.
  • the gear case cover 223 extends to the end face of the arch 225 to integrally close the transmission mechanism 3 in the axial direction.
  • the sliding cover 53 can close the storage clip to prevent dust from entering.
  • the sliding cover 53 can be removed to expose the storage clip 52, so that different working heads can be selected, which requires sliding.
  • the cover 53 has a certain length. When the slide cover 53 is moved to the working position abutting on the front case 13, the slide cover 53 is axially overlapped with the storage portion B and the transmission portion C, and the slide cover 53 is moved to the replaceable work head.
  • the slider 53 In the position, the slider 53 is axially overlapped with the motor portion D and axially overlaps the portion of the transmission portion C.
  • the slider 53 moves.
  • the slider 53 is rotatably mounted on the casing 1, and rotates between the two positions covering the storage clip 52 and the exposed storage clip 52; or similar to the way of sliding the door. , can be opened or closed; or pivotally connected to the casing 1 and the like, can realize the operation of closing the storage clip 52, the storage clip 52 is exposed when the work head needs to be replaced.
  • the working head storage clip 52 of the present invention is substantially cylindrical, and the storage clip 52 includes a receiving compartment 521 for receiving the working head.
  • the receiving compartment 521 is provided with six, evenly distributed along the circumferential direction of the storage clip 52, and the working head is accommodated.
  • the longitudinal direction of the working head at the housing 521 is parallel to the rotational axis of the working head storage clip 52.
  • the storage compartment can also be set up of 4, 5 or more. Regardless of the number of storage compartments, the diameter of the storage clamp is smaller than the maximum radial dimension of the gearbox 22, so that the power tool as a whole is relatively compact. In actual use, there are many working heads required.
  • the present invention additionally provides an embodiment that allows quick and easy replacement of the working head by replacing the working head with a direct replacement of the working head storage clip, and the working head storage clip can be removed directly from the housing without the aid of a tool.
  • FIG. 5 a first embodiment in which the storage head storage clip is removable is shown.
  • the upper portion of the front case 13 is provided with an open portion 133
  • the bottom portion of the front case 13 is provided with a radial opening 134 which is diametrically opposed to the open portion 133.
  • the connecting shaft 51 also moves to the position separated from the working head storage clip 52 by the sliding cover 53, so that the working head storage clip 52 can be pushed from the open portion 133 by directly extending the finger into the radial opening 134.
  • the storage clip 52 After being removed, another storage clip having a different work head mounted thereon can be used by loading the opening 133 into the casing.
  • the storage clip 52 is supported by the arcuate surface contact with the front case 13.
  • the inner wall of the front case 13 may be disposed along the axial direction of the storage clip 52.
  • the extended support rib 132 and the support rib 132 can be directly formed on the front shell or can be detachable ⁇ , . . , , , , ⁇ , ,
  • the unloaded cylindrical long pin mounted on the IT case, the 3 ⁇ 4 type storage clip 52 is supported on the support rib 132, and the storage clip 52 is in line contact with the front case 13. Thereby, the friction between the storage clip 52 and the front case 13 when rotating is reduced.
  • FIG. 19 a second embodiment in which the storage head storage clip is removable is shown.
  • the bottom of the front shell 13 is provided with a rubber cushion 1 35 that closes the radial opening 134, because the rubber cushion 135 has a certain elasticity, which does not affect the operation of the radial opening 1 34 when the working head storage clip 52 is replaced.
  • the storage clip 52 is ejected, and the front case 13 can also be closed to prevent dust and the like from entering the inside of the casing.
  • the same effect can be achieved by providing the shrapnel at the radial opening 1 34.
  • the button can move radially relative to the connecting shaft, when the storage clip needs to be ejected, press the button to take out the storage clip, the button will fall under the effect of its own weight, of course,
  • a spring is disposed between the button and the front case, and the button is kept separated from the storage clip 52 by the action of the spring.
  • a positioning slot 528 is disposed on the end surface of the storage clip 52 adjacent to the transmission mechanism.
  • the number and position of the positioning slot 528 correspond to the receiving compartment 521.
  • the positioning component 54 is matched with the positioning slot 528.
  • the positioning component 54 can be It is a structure known to those skilled in the art such as a spring piece, a steel ball or a steel cap which is subjected to an elastic force, so that an audible prompt is heard while the storage clip 52 is rotated, and precise positioning can also be achieved.
  • the positioning member 54 is disposed at a bottom of the casing 1 and radially opposite to the open portion 133.
  • the positioning groove 528 is located on the end surface of the working head storage clip 52 and communicates with the circumferential surface of the working head storage clip 52, or the positioning groove 528.
  • a radial end along the working head storage clip 52 extends through the circumferential surface of the working head storage clip 52 such that movement of the working head storage clip 52 along the working head storage clip 52 as it is removed from the housing through the open portion 133
  • the direction is not affected by the elastic force of the elastic positioning member 54, and the storage clamp 52 can be easily taken out from the open portion 1 33 by inverting the electric screwdriver, so that the storage clip 52 can be ejected without providing a radial through hole.
  • the storage clip 52 has a main body which may be cylindrical or polygonal in cross section and the main body has an axis of rotation X, and the storage clip 52 is rotatably supported. Between the gearbox cover 223 and the front casing 13 , the main body is provided with a through hole 525 concentric with the rotation axis, so that the storage clamp 52 can be rotated and supported by the through hole 525 (for example, the casing can be extended The elastic positioning member in the through hole 525).
  • a plurality of receiving compartments 521 for receiving the working head are hooked around the axis of rotation X of the main body, and the receiving compartments 521 are parallel to the axis of rotation X of the main body.
  • the preferred receiving compartments 521 are provided with six, evenly distributed around the axis of rotation X of the body. , , , , , When the working head 9 is housed in the receiving compartment 521, the longitudinal direction of the working head is parallel to the rotating glaze of the storage clip 52. Of course, the receiving compartment can also be arranged in four, five or more. Regardless of the number of storage compartments, the diameter of the circumscribed circle of the storage clip is smaller than the maximum radial dimension of the gearbox 22, and preferably the diameter of the storage clamp 52 is less than or equal to 5 cm, so that the power tool as a whole will be small and compact, easy to carry around.
  • the outer peripheral wall of the main body is provided with a plurality of protrusions or grooves parallel to the axial direction of the main body, so that when the storage clip 52 is placed in the electric screwdriver, the operator manually operates the rotary storage clip 52 to increase the friction, and the storage clip 52 is easy. Was moved to rotate.
  • the working head 9 In general, in order to hold the working head 9, when the working head 9 is stored in the housing 521, the working head 9 is axially overlapped with the main body, so that it is impossible to distinguish the storage in each housing 521 from the outer circumferential direction of the main body. What type of work head 9 is present, and the present invention proposes the following three embodiments in order to solve this problem.
  • the outer peripheral wall of the main body at least corresponds to the portion of the receiving compartment 521 is provided with a viewing window 522, and the viewing window 522 is in radial communication with the receiving compartment 521, such that the receiving compartment 521 is along the storage clip 52.
  • a part of the outer circumference of the axial direction is closed, and a part is open to the outside, so that the operator can easily select the shape of the head of the working head 9 from the open portion when selecting the working head 9, thereby quickly selecting the required working head 9 .
  • the length L of the viewing window 522 along the axial direction of the main body is less than one-half of the length of the main body, and preferably the length L of the viewing window is 0.3 0.4 of the length of the main body.
  • the double can effectively display the shape of the head of the working head and prevent the working head from coming off the viewing window.
  • the width W of the viewing window 522 in the circumferential direction of the main body is too large, the working head may slide down from the viewing window when the storage clip 52 is placed in the casing, and if the width W is too small, it is not easy to correctly distinguish the shape of the working head.
  • the width W of the viewing window 522 is smaller than the diameter of the receiving compartment 521, and preferably the width W of the window 521 is between 0.7 and 0.9 times the diameter of the receiving compartment.
  • the receiving compartment 521 may also be closed along the circumferential direction of the main body, and the outer peripheral wall of the main body is provided with an identifying device 523 indicating different working heads.
  • the identification device 523 corresponds to the position of the storage bin 521, where the identification device 523 is a general name for identifying the work head, and the most intuitive identification device 523 is provided with a pattern indicating the shape of different work heads on the outer peripheral wall, such as a commonly used cross batch.
  • the head is represented by the "ten" word shape, and the word prefix is represented by the "one" character shape, which is suitable for each operator.
  • the model number is indicated by "SW” aunt, the model of the hexagonal star is indicated by “TX”, the model of the twelve-pointed star is indicated by the letter “Ms”, and the model of the square is "Pz” "The letters indicate that etc., this setting is more suitable for professional operators.
  • the identification device 523 can be a combination of text, symbols, numbers, shapes, and the like.
  • the identification device 523 is also provided in a variety of ways, such as printing, molding, inlaying or pasting on the outer peripheral wall of the main body, so that the identification device is required to be mounted when the working head is mounted. Of course, those skilled in the art can easily imagine that the identification device 523 can also be detachably mounted on the outer peripheral wall of the main body. If the installation of the working head 9 does not correspond to the identification device 523, the operator can adjust the identification device 523 by himself. Installation location.
  • the main body of the storage clip 52 is entirely made of a transparent material, and the shape of the working head can be easily recognized from the outside of the storage clip 52.
  • the body of the storage clip 52 need not be entirely supported by the transparent material, and the working head can be identified as long as the material corresponding to the head portion of the working head 9 is transparent.
  • the portion of the outer peripheral wall of the main body that closes the receiving compartment 521 is made of a transparent material, preferably The transparent portion made of a transparent material is located at one end of the main body axial direction. To save material, the length of the transparent portion along the axial direction of the main body is less than one-half of the length of the main body.
  • the storage clip 52 itself may be partially open in the outer peripheral wall as in the first embodiment, and the transparent ring 524 may be simply placed on the outer side of the viewing window 522.
  • the invention provides a separate storage clip accessory, which can quickly and easily replace the working head by directly replacing the storage clip, and can prepare a plurality of storage clips, which are small in size and convenient to carry.
  • the connecting shaft 5 1 When the electric screwdriver is required to be operated, the connecting shaft 5 1 is moved forward by the sliding cover 53 to push the selected working head into the output shaft 4.
  • the connecting shaft 51 When the working head needs to be replaced, the connecting shaft 51 is driven by the sliding cover 53.
  • the connecting shaft 51 drives the working head back into the receiving compartment 521 of the working head storage clip. If the connecting shaft 51 continues to move backward, the working head will be driven out of the receiving compartment 521, and the working head cannot be replaced. If the storage clip is rotated without the operator finding it, the tool may be damaged.
  • the present invention proposes four solutions to solve this problem, which are separately described below.
  • FIG. 28 to 30 a first embodiment for restricting the working head 9 from retreating with the connecting shaft 51 is shown.
  • the end of the storage clip 52 facing the gear box 22 is provided with a pressing plate 522.
  • the pressing plate 522 can rotate along with the storage clip 52.
  • the pressing plate 522 can be disposed separately from the storage clip 52, or can be separately disposed.
  • the present application method is preferably provided separately, which is convenient for processing and easy to assemble.
  • the pressing plate 522 is provided with an opening 523 corresponding to the receiving compartment 521 for passing through the connecting shaft 51.
  • a U-shaped groove 526 is disposed on the end surface of the opening 523 facing the storage clip for receiving the U-shaped spring 56 and the U-shaped spring 56. In the free state, a portion overlaps with the opening 523, and the design of the U-shaped groove 526 leaves a space for the elastic deformation of the U-shaped spring 56. Since the number of the preferred housings 521 of the present invention is six, the number of corresponding openings 523 is also six, and the number of U-shaped slots 526 and U-shaped springs 56 is also six.
  • U-shaped groove 526 and U-shaped spring 56 may also be provided only one, that is, the pressing plate 522 is fixedly disposed with respect to the gear box 22, so that the connecting shaft 51 passes through the same opening 523 each time, and does not affect the rotating storage clip 52.
  • the connecting shaft 51 retreats and moves backward with the working head under the action of the magnet 511, the U-shaped spring 56 is elastically deformed and caught on the connecting shaft 51, that is, the U-shaped spring 56 is in the first position allowing the connecting shaft 51 to move. (Refer to Figure 29).
  • the U-shaped spring 56 returns to the free state, blocking the portion of the opening 522, and the working head 9 is blocked by the U-shaped spring 56 as the connecting shaft 51 continues to retreat, that is, the U-shaped spring 56 is in the second position in which the working head 9 is retracted (refer to FIG. 30). .
  • the connecting shaft 51 is separated from the working head 9, and the storage holder can be rotated arbitrarily to select another working head 9 required.
  • an annular groove 512 surrounding the connecting shaft 51 may be provided at a position corresponding to the U-shaped spring 56 on the connecting shaft 51.
  • a spring piece 57 is fixed on the gear box cover 223.
  • the elastic piece 57 is disposed between the storage clamp 52 and the gear case cover 223.
  • the elastic piece 57 is provided with at least one elastic end 571, and the elastic end 571 partially protrudes into the gear case cover 223. In the hole, the elastic deformation of the elastic end 571 can also cause the working head 9 to be caught, and the working head 9 is prevented from moving away from the storage clip 52 when the connecting shaft 51 is retracted.
  • the resilient end 571 is in a first position that allows movement of the connecting shaft 51; Referring to Figure 15, the resilient end 571 is in a second position that limits the retraction of the working head 9.
  • the elastic end 571 can be directly stuck on the gear box cover 223, or a rigid fixing piece can be provided, and the fixing piece can be elastically applied to partially block the gear case cover 223. Movement of the hole and the hole away from the gear box cover 223 to achieve the working head 9 and the connection , One,
  • a hole 223 1 is defined in the gear box cover 223 at a position corresponding to the connecting shaft 5 1 , and a step protrusion 2232 is arranged on the end surface of the gear box cover 223 adjacent to the storage clip 52 , and the step protrusion 2232 surrounds the rotation of the storage clip 52 .
  • the center is correspondingly disposed in the receiving compartment 521, the stepped protrusion 2232 is disconnected at the through hole 223 1 , and the portion of the stepped protrusion 2232 located on both sides of the through hole is provided with a guiding surface 2233 which is rotated along the working head along the storage clip.
  • the height is increased from the perforation 223 1 in the direction, that is, the guide surface 2233 is increased in height from the perforation 223 1 to both sides, thus forming two guiding surfaces, regardless of whether the storage clip 52 is rotated or reversed.
  • the position is oriented.
  • a fourth embodiment for restricting the working head from retreating with the connecting shaft is shown.
  • the guiding surface 2233a is directly disposed on the end surface of the gear box cover 223.
  • the guiding surface 2233a is disposed around the through hole 223 1 and is increased in height from the through hole 2231, thereby forming an annular guiding surface 2233 a, which is advantageous for processing and capable of The position of the working head can be guided when the storage clip is reversed.
  • the operation sliding cover 53 drives the connecting shaft 51 to move to the connecting shaft 5 1 to be separated from the storage clip 52 in the axial direction (ie, the axial direction does not overlap).
  • the working head is still engaged with the connecting shaft 51 under the suction of the magnet 5 11 on the connecting shaft 5 1 and partially extends beyond the end surface of the storage clip 52, and the storage clip 52 is rotated, and the working head is displaced along with the storage clip 52 and the guiding surface 2233 abuts, so that the storage clip 52 is continuously rotated, and the working head 9 is slid under the action of the guiding surface 2233 to the end surface of the working head 9 flush with the end surface of the storage clip 52 without affecting the rotation of the storage clip 52.
  • the connecting shaft 51 can only move the working head 9 to the end surface of the working head and is flush with the end surface of the storage clip 52.
  • the position of the storage clip 52 can also be rotated normally, but in this case, the processing precision and assembly precision of the components are highly demanded, which increases the cost of the electric screwdriver, and the friction between the components is constantly used. The size is inaccurate, and it still occurs that the working head 9 catches the storage clip 52 or the connecting shaft 51 catches the storage clip 52, so that the storage clip 52 cannot rotate normally.
  • the working head and the gear case cover 223, the connecting shaft 5 1 and the storage clip 52 may interfere during the rotation due to a combination of manufacturing precision, sway clearance, material, and the like.
  • By providing the guide surface it is possible to leave a large room for the movement of the connecting shaft 5 1 , thereby improving the number of the mating positions. , ⁇ , , . , .
  • What structure eliminates the possibility of interference of various materials during the rotation of the storage clip 52. This eliminates the need for high manufacturing and assembly precision, which greatly reduces the cost, and the storage clip 52 is less likely to get stuck and can increase the life of the tool.
  • the guiding surface 2233 may be a bevel, a curved surface, a curved surface or the like.
  • a bevel is preferred, and the inclined angle of the inclined surface with respect to the end surface of the storage clip 52 is ⁇ ,
  • the room for the movement of the shaft 51 is roughly the length of the slope multiplied by sin a , so that the larger the angle a is, the larger the room for the movement of the connecting shaft 5 1 is, and the more the force required to rotate the storage clip 52 to drive the working head 9 to move along the slope.
  • the inclination angle a of the inclined surface is preferably between 10 degrees and 30 degrees, so that the rotation of the storage clip 52 does not require much effort, and at the same time, the connecting shaft 51 has sufficient movement. .
  • the output shaft 4 is provided with an inner hexagonal hole in the axial direction to drive the hexagonal working head 9 to rotate.
  • the working head 9 enters the output shaft 4 with the connecting shaft 51, if the working head
  • the hexagonal shape of 9 and the angle of the hexagonal hole in the output shaft 4 are staggered, which causes great inconvenience to the operator.
  • the present invention improves the structure of the output shaft 4, as shown in Figs. 39 to 40, which is a first embodiment of the output shaft 4, and the output shaft 4 is provided with a through hole in the axial direction. 41.
  • the through hole 41 is provided with a torque transmitting portion for transmitting the torque of the output shaft 4 to the working head 9, and a correcting portion for driving the working head and the torque transmitting portion.
  • the torque transmitting portion is at least one disposed in the through hole 41.
  • the radial projection 42 is capable of abutting against one of the faces of the hexagonal working head 9 and restricting rotation of the working head 9 relative to the output shaft 4.
  • the correction portion is a slope 421 disposed in the through hole 41 at one end of the transmission mechanism 3.
  • the output shaft 4 or the working head 9 can be rotated under the guidance of the inclined surface 421 to make the through hole 41 and work.
  • the head 9 is matched, that is, the slope 421 serves to correct the position of the working head 9 relative to the radial projection 42 when the working head 9 enters the through hole 41, that is, the working head 9 and the output shaft 4 are relatively rotated, thereby preventing the working head 9 from being rotated.
  • the corners are caught by the radial projections 42 so that the working head 9 can smoothly enter the through hole 41.
  • the preferred bevel 421 of the present invention is inclined in the circumferential direction such that the guiding direction of the relative rotation of the working head 9 and the output shaft 4 is more clear.
  • 12 radial projections 42 are provided, which are evenly distributed along the circumferential direction, thereby outputting the shaft.
  • the positive section of 4 is formed as a twelve-pointed star with a convexity of 150 degrees, and the twelve-pointed star is formed by superposing two hexagonal squares at intervals of 30 degrees.
  • the 41 matches, so that the working head 9 smoothly enters the output shaft 4.
  • the radial convex super 42 and the inclined surface 421 may be coupled together, and the radial projection 42 extends axially along the output shaft 4, so that the contact area with the working head 9 is larger, and the torque transmitting effect is better.
  • the radial projection 42 and the slope 421 may also be provided separately, axially broken or circumferentially offset, and the like.
  • a second embodiment of the output shaft 4 only one of the radial projections 42 in the through hole 4 1 is provided as one of the twelve corners, the same radial projection.
  • the inclined surface 421 is disposed at one end of the 42, and the inclined surface 421 is inclined along the circumferential direction.
  • the output shaft 4 can drive the working head 9 to rotate by a radial protrusion 42, and the working head 9 can also be realized by guiding a slope 421 or The rotation of the output shaft 4 causes the working head 9 to smoothly enter the output shaft 4.
  • the space in which the head 9 can move radially in the output shaft 4 is small.
  • the guiding portion is an inner step 43 disposed in the through hole 41 adjacent to one end of the working head storage clip 52.
  • the inner diameter of the inner step 43 is larger than the inner diameter of the through hole 41, and the inner step 43 and the through hole 41 are transitioned by the inclined surface.
  • the height of the inner step 43 in the axial direction is substantially equal to the height of the inclined surface 421 in the axial direction, so that when the working head 9 just enters the output shaft 4, the working head 9 has a larger space for rotation or axial movement with respect to the output shaft 4. Thereby entering the output shaft 4 is smoother.
  • a sinking groove 45 communicating with the inner step 43 may be provided in the output shaft 4 through hole 41 at a position opposite to the center of the radial projection 42 at a center symmetry with respect to the center of the tip end of the radial projection 42. The point is located between the two side edges 413 of the sinker 45.
  • the sinker 45 has a bottom surface 411 and two side surfaces 412 connected to the through hole 41. The bottom surface 411 and the through hole 41 are inclined to each other, and the working head 9 is easily guided to the through hole.
  • the two side faces 412 are inclined in the circumferential direction, so that when the working head 9 enters the output shaft 4 and the hexagonal tip of the working head 9 faces the tip of the radial projection 42, the working head 9 moves radially to
  • the sinker 45 is rotated under the guide of the side surface 412 while entering the through hole 41 under the guide of the bottom surface 411. This ensures that the working head 9 can smoothly enter the output shaft 4 at any angle.
  • the radial protrusion 42 of the output shaft 4 is in surface contact with the working head 6 to rotate the working head 9, so that the working head 9 is evenly stressed and the force per unit area is small.
  • the radial protrusion 42 of the output shaft 4 and the working head 9 are in line contact, and the working head 9 can also be rotated, such as: no radial protrusion is defined.
  • the angle of 42 is such that it can drive the working head 9 to rotate, and the inclined surface 421 at one end thereof is inclined in the circumferential direction, so that the working head 9 can smoothly enter the output shaft 4.
  • the above embodiment relates to an improvement of the output shaft itself.
  • an elastic pressing device can be provided on the output shaft 4, and the elastic pressing device is passed through the working head 9 into the output shaft. The relative positions of the working head 9 and the output shaft are adjusted so that the working head 9 smoothly enters the output shaft.
  • the receiving hole 41 of the output shaft 4 includes a torque transmitting portion 461 for driving the working head to rotate in the axial direction, and the convenient working head enters.
  • the correcting portion 462, the correcting portion 462 is a circular hole, and the torque transmitting portion 461 is a hexagonal hole. This facilitates the working head 9 to enter the receiving hole 41.
  • the elastic pressing device is disposed at the position corresponding to the correcting portion 462, and is connected to the receiving hole 41.
  • the elastic piece 464 is at least partially protruded into the correction portion 462 of the receiving hole 41, and the pressing member 465 is disposed at a position axially corresponding to the extending surface of one of the hexagonal holes of the torque transmitting portion 461, thus working.
  • the head 9 When the head 9 enters the correcting portion 462, if one of the six outer peripheral faces of the working head 9 axially corresponds to the pressing member 465, the working head 9 can directly enter the torque transmitting portion 461; Referring to FIG. 48 to FIG. 50, one of the six outer peripheral surfaces of the working head 9 is axially offset from the four-turning member 465, and then the working head 9 enters the correcting portion 462 and radially presses the pressing member 465, and the pressing member 465 presses the elastic of the C-shaped elastic piece 464.
  • the 4-turn member 465 is also subjected to the reverse force of the C-shaped elastic piece 464, and the pressing member 465 presses the working head 9 under the opposing force of the C-shaped elastic piece 464, so that the working head 9 and the output shaft 4 are A relative rotation occurs therebetween, and one of the six outer peripheral faces of the working head 9 is axially corresponding to the fourth hydraulic member 465.
  • the working head 9 is matched with the torque transmitting portion 461 so that the working head 9 can smoothly enter the torque transmitting portion 461, C.
  • the type of elastic piece 464 is returned to the initial state.
  • Fig. 53 and Fig. 57 show a second embodiment of the present invention, in which the correction portion 462a of the output shaft 4 is provided as a square hole, and the torque transmitting portion 461a is provided in a twelve-pointed star shape, which is a twelve-corner in the present embodiment.
  • the star is formed by two regular squares having a phase difference of 30 degrees, such that the torque transmitting portion 461a has twelve inwardly projecting radial projections 42, which can be combined with the hexagonal working head 9.
  • the torque receiving portion abuts and restricts the rotation of the working head 9 relative to the output shaft 4.
  • the pressing member 465 can be disposed at a position aligned with the axially extending line of the joint portion of the two adjacent radial projections, such that when the working head 9 enters the correcting portion 462a, if the hexagonal outer peripheral surface of the working head 9 One of the planes corresponds to the axial direction of the 4th member 465, and the working head 9 can directly enter the torque transmitting portion 461a; referring to Figs. 56 and 57, , ,
  • One of the hexagonal outer peripheral faces of the working head 9 is axially offset from the pressing member 465, and the working head 9 is rotated relative to the output shaft 4 to the radial projection 42 by the pressing member 465 and the C-shaped elastic piece 464.
  • One of the faces of the working head 9 is fitted to enter the torque transmitting portion 461a.
  • the working head is uniformly driven by the output shaft 4, and of course, it may be two pairs or three pairs, etc., wherein two of each pair are diametrically opposed, and the radial protrusion 42 can One of the faces of the hexagonal working head 9 abuts and restricts the rotation of the working head 9 relative to the output shaft 4.
  • the radial protrusion 42 of the output shaft 4 is in surface contact with the working head 6 to rotate the working head 9, so that the working head 9 is evenly stressed and the force per unit area is small.
  • the radial protrusion 42 of the output shaft 4 in line contact with the working head 9 can also drive the working head 9 to rotate, such as: the angle of the radial protrusion 42 is not limited, as long as it can drive the working head 9 to rotate, the pressing member 465 It is disposed at a position corresponding to the axial direction of the extending portion of the radial projection 42, so that the working head 9 can be smoothly entered into the output shaft 4.
  • the pressing member refers to a steel ball, a steel column, etc.
  • the steel ball can be provided with two, as long as one of them is axially corresponding to the radial protrusion 42, so that the symmetrical or asymmetrical distribution can achieve a smooth working head. Enter the output shaft 4.
  • the torque transmitting portion is hexagonal or twelve-pointed, and the hexagonal outer shape of the working head 9 and the torque transmitting portion of the output shaft 4 need to be completely matched. If the deviation is slight, the working head 9 may be caused. It is not possible to smoothly enter the output shaft 4.
  • FIGS. 58 to 63 show a third embodiment of the present invention, in which the torque transmitting portion takes only an odd or even number of twelve radial projections, so that the torque transmitting portion has six diameters.
  • each of the two radial protrusions 42 is transitioned by a circular arc, and the pressing member 465 is disposed at a position aligned with one of the radial protrusions along the axially extending portion, referring to FIG. 61, when the working head 9 is The hexagonal shape is offset from the torque transmitting portion, the working head 9 is blocked by the pressing member 465, the working head 9 continues to advance, and the pressing member 465 forces the C-shaped elastic piece 464 to elastically deform, and at the same time, the C-shaped elastic piece 464 elastically acts against the pressing force.
  • the workpiece 465 rotates the working head 9 and the output shaft 4 relative to each other, referring to FIG.
  • the working head 9 can be smoothly operated. Entering the torque transmitting portion of the output shaft, in fact, the working head 9 and the output shaft 4 only need to rotate relative to each other at a small angle, and the arc transition can leave sufficient space for the relative rotation of the working head 9 and the output shaft 4. .
  • the torque transmission portion of the output shaft can be directly entered, that is, the angle K corresponding to the arc portion is the interference-free angle of the working head 9 entering the output shaft.
  • this method is 30 degrees, so the six arcs are 180 degrees, which means that the working head enters the torque transmission part of the output shaft and has a general probability of entering directly without correction. It is possible to increase the service life of the elastic pressing device.
  • the elastic pressing device includes a radial through hole 463a disposed at a position of the correction portion 462 on the output shaft 4 and communicating with the receiving hole 41, and an annular wire 466 having an opening
  • the position of the radial through hole 463a of the output shaft 4 is provided, and the annular wire 466 is provided with a protruding portion 465a.
  • the protruding portion 465a is received in the radial through hole 463a and partially protrudes into the correcting portion 462.
  • the radial through hole 463a is a waist hole, and the length direction thereof extends along the circumferential direction of the output shaft, so that the length of the output shaft 4 can be reduced, thereby making the structure more compact, and of course, can also be set to a circular shape as needed. , square, etc.
  • the working head 9 When the working head 9 enters the correcting portion 462, if one of the six outer peripheral faces of the working head 9 is circumferentially corresponding to the protruding portion 465a, the working head 9 can directly enter the torque transmitting portion 461; and if the working head 9 is One of the six peripheral surfaces is circumferentially offset from the projection 465a, and the working head 9 is rotated relative to the output shaft 4 by the annular wire 466 so that the hexagonal shape of the working head 9 matches the torque transmitting portion 461, thereby working the head. 9 can smoothly enter the output shaft 4
  • two radial through holes 463 a and two corresponding annular wires 466 are preferably disposed, and are axially spaced along the output shaft 4, so that the guiding of the working head 9 into the output shaft 4 is further advanced.
  • the two radial through holes 463a may be circumferentially staggered, that is, the relative phase difference between the two radial through holes 463a is less than 30 degrees, that is, the angle between the two radial through holes 463a is plus or minus 60 degrees.
  • the relative phase difference can ensure that even if one of the hexagonal shapes of the working head 9 is facing the convex portion of one of the annular wires, the protruding portion of the other annular wire can just be the other shape of the hexagonal shape of the working head.
  • the ribs are staggered so that the working head 9 can be guided to enter the correcting portion 462 at an arbitrary angle so that the outer shape of the working head 9 matches the torque transmitting portion 461.
  • FIG. 66 shows a fifth embodiment of the present invention.
  • the elastic pressing device includes a radial through hole 463 which is disposed on the output shaft 4 at a position of the correcting portion 462 and communicates with the receiving hole 41, and is received in the radial through hole 463.
  • the pressing piece 465 and the elastic piece 467 of the radial biasing pressing member 465 wherein the elastic piece 467 is a sheet spring extending axially along the output shaft 4, one end of the elastic piece 467 is fixed to the output shaft 4 and the casing 1 Meanwhile, the other end is abutting against the free end of the pressing member 465, and the free end of the elastic piece 467 can be set to be bent, so that the elastic force of the elastic piece 467 against the pressing member 465 can be increased.
  • the principle that the working head 9 enters the output shaft 4 in the present embodiment is the same as that in the first embodiment, and details are not described herein again.
  • Figure 67 shows a sixth embodiment of the present invention, the elastic pressing device comprising the output shaft 4 , a radial through hole 463 in which the upper portion of the correction shaft 462 communicates with the receiving hole 41, and a spring piece 467a that is received in the radial through hole 463 and protrudes into the correcting portion 462.
  • One end of the elastic piece 467a is fixed to the output shaft 4 Between the other end and the casing 1, the other end is a free end having a bent portion 468, wherein the bent portion 468 extends into the correcting portion 462, where the bent portion 468 corresponds to the pressing member, that is, the pressing member and the elastic portion
  • the integrated device can also be used to guide the working head.
  • the output shaft 4 has an axially disposed receiving hole 41b.
  • the receiving hole 41b is a circular hole, and the output shaft 4 is provided with a receiving hole 41b.
  • the first receiving slot 483, the first receiving slot 483 receives a first locking member 484 that partially extends into the receiving hole 41b, and the first locking member 484 and the edge of the working head housed in the receiving hole 41b One of the circumferential faces abuts to limit the rotation of the working head relative to the output shaft 4.
  • the working head 9 When the working head 9 enters the output shaft 4, as long as one of the hexagonal shapes of the working head 9 corresponds to the first locking member 484, the working head 9 can smoothly enter the output shaft 4, so that the output shaft 4 passes the first locking
  • the piece 484 drives the working head to rotate.
  • the output shaft 4 drives the rotation of the working head 9 by providing the first receiving groove 483 and the first locking member 484, etc., that is, if the output shaft is directly driven by the gear, the working head can smoothly enter the output shaft.
  • the second receiving groove 487 is disposed on the output shaft 4 so as to be spaced apart from the first receiving groove 483.
  • the second receiving groove 487 receives a portion extending into the receiving hole 41a.
  • the second locking member 488 abuts against one of the six sides of the connecting shaft 51 extending into the receiving hole 41b to drive the output shaft 4 to rotate. That is, as long as one of the hexagonal shapes of the connecting shaft 51 corresponds to the first locking member 484, the connecting shaft 51 can smoothly enter the output shaft 4, so that the connecting shaft 51 drives the output shaft 4 to rotate by the second locking member 488.
  • the working head 9 enters the output shaft 4 and is blocked by the first locking member 484, so that the first locking member 484 can be set to
  • the radial movement is possible to allow the working head 9 to enter the output shaft 4, while the output shaft 4 can also rotate the working head 9 by the first locking member 484.
  • a limiting member 48 can be disposed between the output shaft 4 and the front housing 13, and the output shaft 4 can move axially relative to the limiting member 48.
  • the first locking member 484 is limited in accordance with the axial movement of the output shaft 4.
  • the position member 48 allows or restricts the radial movement, and the first locking portion 481 and the first releasing portion 482 are disposed on the limiting member 48 along the axial direction, and the first locking member 484 is allowed to release with the first release when the radial movement is allowed.
  • the portion 482 is engaged, the first locking member 484 is engaged with the first locking portion 481 when the radial movement is restricted, and the elastic member 489 may be disposed between the output shaft 4 and the limiting member 48.
  • the output glaze 4 is glazed toward the movable compression elastic member 489.
  • the output shaft 4 can return to the position where the first locking member 484 is engaged with the first locking portion 48 1 under the elastic force. Thereby, the output shaft drives the working head to rotate through the locking member.
  • the second releasing portion 486 and the second portion may be disposed on the limiting member 48 corresponding to the position of the second locking member 488.
  • the specific working process is as follows. When the straight face of the working head 9 is aligned with the first locking member 484, it will not be blocked, and the output shaft 4 can be smoothly inserted. If one side of the hexagonal shape of the connecting shaft 5 1 is also Aligning the second locking member 488, the connecting shaft 51 can also be smoothly inserted into the output shaft 4, and when the rotating shaft 5 1 rotates, the output shaft 4 is rotated by the second locking member 488, and the output shaft 4 is driven by the first locking member 484. The working head 9 rotates together.
  • the connecting shaft 51 will move forward with the second locking member 488 and the output shaft 4 against the elastic force until the second locking member 488 Disengaged from the second locking portion 485 of the limiting member 48, the second locking member 488 is radially moved to engage with the second releasing portion 486, and the connecting shaft 5 1 smoothly enters the output shaft 4, after being turned on, the connecting shaft 51 is
  • the limiting member 48 presses the second locking member 488 under the elastic force, the radial movement of the second locking member 488 is disengaged from the second releasing portion 486, and the output shaft 4 is driven by the elastic force.
  • the locking member 488 is axially moved, so that the second locking member 488 is returned to the position engaged with the second locking portion 485, and the connecting shaft 51 can drive the output shaft 4 to rotate by the second locking member 488.
  • the electric screwdriver is in operation, and the push button switch 7 is pressed to perform the screwing operation.
  • the operation slider 53 is moved in the direction of the motor 2, as shown in FIG. 5, FIG. 10 and FIG. 11, the slope 533 on the slide cover 53 and the limit block 81 are attached.
  • One side 813 contacts, and as the slider 53 moves, the limiting block 81 pivots under the action of the inclined surface 533 to the position shown in FIG. 13, and the limiting block 8 1 releases the axial movement of the fixed block 50.
  • the sliding cover 53 continues to drive the connecting shaft 51 to move to the extreme position, and the working head 9 cannot Crossing the U-shaped spring 56 And remaining in the work head storage clip 52, at this time, the work head 9 to be replaced is found through the open portion of the storage compartment 521 provided on the work head storage clip 52, and the work head storage clip 52 is rotated to set the required work head. 9 is turned to the axially opposite position of the output shaft 4, that is, the position shown in FIG.
  • the sliding cover 53 is reset in the direction of the output shaft 4, and the sliding cover 53 is moved against the fixed block 50 by the second protrusion 536 to drive the connecting shaft 5 1 to move in the direction of the output shaft 4, and the connecting shaft 51 is provided with one end of the magnet 51 1 in contact with the selected tail portion of the working head 9 and adsorbs the working head 9, and the sliding cover 53 drives the connecting shaft 5 1 to move in the direction of the output shaft 4, with reference to FIG. 41 or FIG.
  • the motor may be replaced by a gasoline engine or a diesel engine;
  • the working head may be a regular polygonal cross section;
  • the relative axial movement between the connecting shaft and the working head storage clip may also be a connecting shaft.
  • Fixed, and the working head storage clip can be moved axially or rotated, and the connecting shaft can also be coaxial with the motor shaft and the like.
  • the limiting mechanism is mainly used to limit the axial movement of the connecting shaft, and there is no special requirement for its structure.
  • the configuration can be changed according to the internal pattern of different casings, new components can be added, and unnecessary components can be reduced. .

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Abstract

一种动力工具，包括：机壳（1）；马达（2），位于机壳（1）内并输出旋转动力；输出轴（4），具有轴向设置的容纳工作头的收容孔；传动机构（3），用于将马达（2）输出的旋转动力传递给输出轴；存储夹（52），包括用于收容若干个并列设置的工作头的收容仓（521）；连接轴（51），能够在穿过收容仓使若干个工作头（9）之一位于收容孔内的工作位置及与若干个工作头之一分开的释放位置之间轴向运动；动力工具还包括设置在机壳和连接轴之间的限位机构（8、8a、8b），限位机构包括可操作地在两个位置间运动的限位块（81、81a、81b），在第一位置，连接轴处于工作位置，限位块限制连接轴向远离工作头的方向运动；在第二位置，连接轴处于释放位置，限位块允许连接轴向远离工作头的方向运动。该动力工具在更换工作头的过程中能有效的防止工作头离开存储夹，确保了较高的可靠性。还涉及用于上述动力工具的操作方法。

Description

动力工具及用于该动力工具的操作方法 技术领域
本发明涉及一种动力工具， 尤其涉及一种可实现工作头的储存和快速更 换的枪钻类动力工具。 本发明还涉及用于上述动力工具的操作方法。
背景技术
在现有的枪钻类动力工具中， 通常包括电钻、 电动螺丝刀和冲击钻。 电动螺丝刀是用于将螺钉拧紧到工件上的一种常用的电动工具。 当使用 过程中需要拧紧不同规格的螺钉的时候， 根据螺钉规格的不同更换不同的工 作头，也就是批头， 即要把原来安装的工作头取下， 然后装上另一种结构的工 作头。 在需要频繁更换工作头的使用场合下， 给操作者带来了极大的不便， 一方面造成了更换工作头烦瑣， 另一方面取下的工作头随处放置容易丢失。 虽然， 在一些手动工具中有一些能实现工作头的储存和快速更换， 但是由于 手动工具的固有缺点， 即扭矩小， 操作费劲， 使得操作者很容易疲劳， 造成 效率低下， 不适合在工业产业中作为专业的工具使用。
中国实用新型专利 CN201086280Y 揭示了一种多刀头电动工具， 包括电 动工具主体和多刀头转轮结构， 多刀头转轮结构包括一个可收容多个刀头的 多刀头转轮筒， 多刀头转轮筒可轴向滑动的与工具主体相连， 当多刀头转轮 筒滑动到远离工具主体的位置时， 可通过旋转多刀头转轮筒从而选择需要的 刀头。 但是其转轮筒中存储的刀头是有限的， 当操作者需要用到其他的刀头 时， 更换起来比较麻烦。
另外， 在多刀头转轮筒远离工具主体时， 其连接轴是棵露在外的， 灰尘、 粉末会在多刀头转轮筒滑动的过程中进入电动工具内部或者多刀头转轮筒的 内部， 时间长了会造成多刀头转轮筒无法旋转进行刀头选择， 或者直接导致 电动工具无法使用。 而且工作的时候工作头是抵在工件上， 这样连接轴需要 承受反方向的作用力， 连接轴会给传动机构带来压力从而传动机构不能把扭 矩传递到连接轴， 这样的构造也使得多刀头电动工具的传动不可靠。
而且， 如果操作者关闭电机手动旋转刀头时， 可能触发刀头带动连接轴 旋转继而使电机旋转可能会损坏电机， 而且无法手动操作来拧紧螺钉， 给操 作者带来很大的不便。
在更换刀头时， 需要先将刀头退回至转轮筒， 为了防止转轮筒轴向移动 … , , , 时刀头被磁铁吸住而从转轮筒中离开， 中国买用新型专利 CN201086280Y揭 示了其通过在刀头上设置固定环的方式以防止刀头与转轮筒脱开， 但是这样 的刀头需要特别订制， 使得工具的使用不具有通用性。 而且直接通过连接轴 带动刀头旋转比较不稳定， 因为连接轴的长度越长， 连接轴的跳动就越大， 给工具的使用者带来一些潜在的危险。 再者， 因为转轮筒需要轴向移动与连 接轴分开， 很容易进入灰尘等杂物而无法清洗。
由于电动工具在使用过程中的随意性， 因此停机时连接轴上安装工作头 的筒壁的角度是不确定的， 而工作头退回转轮筒的角度也是不确定的， 所以 在更换工作头的过程中， 就有可能存在连接轴的筒壁的角度与工作头角度的 错位， 造成工作头无法正确、 顺利进入连接轴的情况。 中国实用新型专利 CN201086280Y 还揭示了多刀头转轮筒与开关联动， 当多刀头转轮筒滑动到 远离工具主体的位置时， 可通过旋转多刀头转轮筒从而选择需要的刀头； 当 多刀头转轮筒滑动回到工具主体时， 其带动联动杆移动， 联动杆会触压到开 关使电机工作， 旋转一定的角度使套筒角度与刀头角度相配合。 一方面， 经 常性的短时启动电机容易造成电机寿命减短或者损坏； 另一方面多刀头转轮 筒与开关联动需要精确地定位控制， 成本较高。
一般情况下， 操作者无法从机壳外看到收容在存储夹中的工作头的具体 形状， 操作者为了找到需要的工作头， 需要通过操作机构推出或者拉回工作 头若干次， 这样的操作会比较繁瑣， 从而工作效率较低。
发明内容
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠的动力工具。 本发明的另一个目 的在于提供一种工作效率较高的动力工具的操作方 法。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容若 干个并列设置的工作头的收容仓； 连接轴， 所述连接轴能够在穿过收容仓与 若干个工作头之一配接并使若干个工作头之一位于收容孔内的工作位置以及 与所述若干个工作头之一分开的释放位置之间轴向运动； 所述动力工具还包 括设置在机壳和连接轴之间的限位机构， 所述限位机构包括可操作地在两个 , ,
位置间运动的限位块， 在第一位置， 所述连接轴处于工作位置， 所迷限位块 限制连接轴向远离工作头的方向运动， 在第二位置， 所述连接轴处于释放位 置， 所述限位块允许连接轴向远离工作头的方向运动。
优选的， 所述动力工具还包括设置于机壳上能够沿连接轴轴向移动的操 作件，所述操作件带动所述连接轴轴向运动。
优选的， 所述操作件上设有与限位块相抵的解锁部， 所述操作件通过所 述解锁部带动限位块在第一位置和第二位置之间运动，并且在所述第二位置， 所述操作件能够带动所述连接轴轴向运动。
优选的， 所述存储夹的一部分收容在所述机壳内， 另一部分被所述操作 件覆盖并且随着操作件移动而露出。
优选的， 所述操作件和机壳二者之一上沿连接轴轴向设有导向槽， 所述 操作件和机壳二者之另外一个上设有与导向槽相配的导轨， 所述操作件通过 所述导轨在导向槽内滑动而相对于机壳沿连接轴轴向运动。
优选的， 所述操作件内部沿所述连接轴轴向间隔的设有第一凸块和第二 凸块， 所述连接轴远离所述存储夹的一端设有固定块， 所述固定块相对于连 接轴轴向固定并且位于所述第一凸块和第二凸块之间， 所述固定块能够在第 一凸块和第二凸块之间轴向运动。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述限位块围绕垂直于连接轴轴向的枢轴旋转。
优选的， 所述限位块围绕平行于连接轴轴向的枢轴旋转。
优选的， 所述限位块沿着垂直于连接轴轴向的方向直线运动。
优选的， 所述连接轴的一端与所述传动机构可传递扭矩的连接， 所述连 接轴的另一端能够与所述输出轴连接并通过输出轴驱动工作头旋转。
优选的， 所述限位机构还包括向第一位置抵压限位块的弹性元件。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和所述齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 , , ,
连接釉相逆的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减迷机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
本发明还涉及一种动力工具的操作方法， 所述动力工具包括： 机壳； 马 达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳工作头 的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋转动力 传递给输出轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容若干个并 列设置的工作头的收容仓； 连接轴， 所述连接轴能够在穿过收容仓与若干个 工作头之一配接并使若干个工作头之一位于收容孔内的工作位置以及与所述 若干个工作头之一分开的释放位置之间轴向运动； 所述动力工具还包括设置 在机壳和连接轴之间的限位机构， 所述限位机构包括可操作地在两个位置间 运动的限位块， 在第一位置， 所述连接轴处于工作位置， 所述限位块限制连 接轴向远离工作头的方向运动， 在第二位置， 所述连接轴处于释放位置， 所 述限位块允许连接轴向远离工作头的方向运动，所述操作方法包括以下步骤： 1 ) 操作限位块处于第二位置， 解除限位块对连接轴轴向运动的限制； 2 ) 移 动连接轴处于释放位置； 3 ) 操作存储夹， 选择需要的工作头； 4 ) 移动连接 轴回复至工作位置。
优选的， 所述动力工具还包括设置于机壳上能够沿连接轴轴向移动的操 作件，所述操作件带动所述连接轴轴向运动， 所述操作件上设有与限位块相抵 的解锁块， 所述操作件通过所述解锁块带动限位块在第一位置和第二位置之 间运动， 所述操作方法还包括： 通过轴向移动操作件使限位块处于第二位置 后， 继续移动操作件并带动连接轴处于释放位置。
优选的， 所述操作存储夹的方式为旋转存储夹。
本发明解决其技术问题所釆用的另一种技术方案是： 一种动力工具， 包 括： 机壳； 马达， 设置在机壳内， 并输出旋转动力； 连接轴， 与若干个工作 头之一配接并用于驱动所述若干个工作头之一旋转； 传动机构， 设置在马达 和连接轴之间并可将马达输出的旋转动力传递给连接轴； 存储夹， 设置于机 壳内， 所述存储夹包括用于收容若干个并列设置的工作头的收容仓， 所述连 接轴能够在穿过收容仓与若干个工作头之一配接的工作位置以及与所述若干 , , , 个工作头之一分开的释放位置之间轴向运动； 所述动力工具还包栝设置在机 壳和连接轴之间的限位机构， 所述限位机构包括可操作地在两个位置间运动 的限位块， 在第一位置， 所述连接轴处于工作位置， 所述限位块限制连接轴 向远离工作头的方向运动， 在第二位置， 所述连接轴处于释放位置， 所述限 位块允许连接轴向远离工作头的方向运动。
优选的， 所述动力工具还包括设置于机壳上能够沿连接轴轴向移动的操 作件，所述操作件带动所述连接轴轴向运动。
优选的， 所述操作件上设有与限位块相抵的解锁部， 所述操作件通过所 述解锁部带动限位块在第一位置和第二位置之间运动，并且在所述第二位置， 所述操作件能够带动所述连接轴轴向运动。
优选的， 所述存储夹的一部分收容在所述机壳内， 另一部分被所述操作 件覆盖并且随着操作件移动而露出。
优选的， 所述操作件和机壳二者之一上沿连接轴轴向设有导向槽， 所述 操作件和机壳二者之另外一个上设有与导向槽相配的导轨， 所述操作件通过 所述导轨在导向槽内滑动而相对于机壳沿连接轴轴向运动。
优选的， 所述操作件内部沿所述连接轴轴向间隔的设有第一凸块和第二 凸块， 所述连接轴远离所述存储夹的一端设有固定块， 所述固定块相对于连 接轴轴向固定并且位于所述第一凸块和第二凸块之间， 所述固定块能够在第 一凸块和第二凸块之间轴向运动。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述限位块围绕垂直于连接轴轴向的枢轴旋转。
优选的， 所述限位块围绕平行于连接轴轴向的枢轴旋转。
优选的， 所述限位块沿着垂直于连接轴轴向的方向直线运动。
优选的， 所述动力工具还包括用于连接工作头的输出轴， 所述连接轴的 一端与所述传动机构可传递扭矩的连接， 所述连接轴的另一端能够与所述输 出轴连接并通过输出轴驱动工作头旋转。
优选的， 所述限位机构还包括向第一位置抵压限位块的弹性元件。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， ^. , , …
所迷齿轮葙和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和所述齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
本发明还涉及一种动力工具的操作方法， 所述动力工具包括： 机壳； 马 达， 设置在机壳内， 并输出旋转动力； 连接轴， 与若干个工作头之一配接并 用于驱动所述若干个工作头之一旋转； 传动机构， 设置在马达和连接轴之间 并可将马达输出的旋转动力传递给连接轴； 存储夹， 设置于机壳内， 所述存 储夹包括用于收容若干个并列设置的工作头的收容仓， 所述连接轴能够在穿 过收容仓与若干个工作头之一配接的工作位置以及与所述若干个工作头之一 分开的释放位置之间轴向运动； 所述动力工具还包括设置在机壳和连接轴之 间的限位机构， 所述限位机构包括可操作地在两个位置间运动的限位块， 在 第一位置， 所述连接轴处于工作位置， 所述限位块限制连接轴向远离工作头 的方向运动， 在第二位置， 所述连接轴处于释放位置， 所述限位块允许连接 轴向远离工作头的方向运动， 所述操作方法包括以下步骤： 1 )操作限位块处 于第二位置， 解除限位块对连接轴轴向运动的限制； 2 )移动连接轴处于释放 位置； 3 ) 操作存储夹， 选择需要的工作头； 4 ) 移动连接轴回复至工作位置。
优选的， 所述动力工具还包括设置于机壳上能够沿连接轴轴向移动的操 作件，所述操作件带动所述连接轴轴向运动， 所述操作件上设有与限位块相抵 的解锁块， 所述操作件通过所述解锁块带动限位块在第一位置和第二位置之 间运动， 所述操作方法还包括： 通过轴向移动操作件使限位块处于第二位置 后， 继续移动操作件并带动连接轴处于释放位置。
优选的， 所述操作方法还包括： 移动操作件带动连接轴处于释放位置后， 所述存储夹的一部分随着操作件移动而露出。
优选的， 所述限位机构还包括向第一位置抵压限位块的弹性元件， 所述 操作方法还包括： 所述连接轴回复至工作位置后， 所述限位块受弹性抵压回 复至第一位置。 , , , 与现有抆水相比， 本发明的有益效果是： 本发明的动力工具在工作过程 中能有效的限制连接轴移动， 确保了较高的可靠性。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 连接轴， 与若干个工作头之一 配接并用于驱动所述若干个工作头之一旋转； 传动机构， 设置在马达和连接 轴之间并可将马达输出的旋转动力传递给连接轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容若干个并列设置的工作头的收容仓， 所述连接轴能 够在穿过收容仓与若干个工作头之一配接的工作位置以及与所述若干个工作 头之一分开的释放位置之间轴向运动； 所述动力工具还包括设置在存储夹一 端的阻挡件， 所述阻挡件能够在两个位置间运动， 在第一位置， 所述连接轴 处于工作位置， 所述阻挡件允许连接轴轴向运动， 在第二位置， 所述连接轴 处于释放位置， 所述阻挡件阻止工作头离开收容仓。
优选的， 所述存储夹和传动机构之间设有压板， 所述压板上对应其中一 个收容仓的位置设有供所述连接轴穿过的孔， 所述阻挡件设置在压板上并与 所述孔部分重叠。
优选的， 所述阻挡件为轴向固定在所述压板上的 U型弹簧， 所述 U型弹 簧能够沿所述孔的径向弹性变形。
优选的， 所述阻挡件为弹片， 所述弹片的一端轴向固定在所述压板上的， 所述弹片另一端与所述孔部分重叠。
优选的， 所述连接轴上设有环形凹槽， 当所述连接轴处于工作位置时， 所述环形凹槽与所述阻挡件的位置轴向对应。
优选的， 所述机壳上可滑动的连接有操作件， 所述存储夹的一部分收容 在所述机壳内， 另一部分被所述操作件覆盖并且随着操作件移动而露出。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述操作件带动所述连接轴轴向运动。
优选的， 所述动力工具还包括用于连接工作头的输出轴， 所述连接轴的 一端与所述传动机构可传递扭矩的连接， 所述连接轴的另一端能够与所述输 出轴连接并通过输出轴驱动工作头旋转。 ^ , , ,
优逸的， 所述存储夹可旋转的支撑在机壳内并位于传动机构和输出轴之 间。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和所述齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 马 达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳工作头 的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋转动力 传递给输出轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容若干个并 列设置的工作头的收容仓； 连接轴， 所述连接轴能够在穿过收容仓与若干个 工作头之一配接并使若干个工作头之一位于收容孔内的工作位置以及与所述 若干个工作头之一分开的释放位置之间轴向运动； 所述动力工具还包括设置 在存储夹一端的阻挡件， 所述阻挡件能够在两个位置间运动， 在第一位置， 所述连接轴处于工作位置， 所述阻挡件允许连接轴轴向运动， 在第二位置， 所述连接轴处于释放位置， 所述阻挡件阻止工作头离开收容仓。
优选的， 所述存储夹和传动机构之间设有压板， 所述压板上对应其中一 个收容仓的位置设有供所述连接轴穿过的孔， 所述阻挡件设置在压板上并与 所述孔部分重叠。
优选的， 所述压板连接于存储夹上， 所述孔与所述阻挡件的数量与所述 收容仓的数量相等。
优选的， 所述阻挡件为轴向固定在所述压板上的 U型弹簧， 所述 U型弹 簧能够沿所述孔的径向弹性变形。
优选的， 所述阻挡件为弹片， 所述弹片的一端轴向固定在所述压板上的， 所述弹片另一端与所述孔部分重叠。
优选的， 所述连接轴上设有环形凹槽， 当所述连接轴处于工作位置时， , ,
所迷环形凹槽与所述阻挡件的位置轴向对应。
优选的， 所述机壳上可滑动的连接有操作件， 所述存储夹的一部分收容 在所述机壳内， 另一部分被所述操作件覆盖并且随着操作件移动而露出。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述操作件带动所述连接轴轴向运动。
优选的， 所述连接轴的一端与所述传动机构可传递扭矩的连接， 所述连 接轴的另一端能够与所述输出轴连接并通过输出轴驱动工作头旋转。
优选的， 所述存储夹可旋转的支撑在机壳内并位于传动机构和输出轴之 间。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和所述齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具在更换工作 头的过程中能有效的防止工作头离开存储夹， 确保了较高的可靠性。
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠、 成本低的 动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机 构具有用于支撑工作头的若干个并列设置的收容空间， 所述工作头支撑机构 能够被调整到其中一个收容空间与输出轴轴向对应的位置； 连接轴， 设置于 , ^ ,、 ， ， ，Α , Α , ^ , 机壳內， 所迷连接轴能够在两个位置间运动， 在第一位置， 所迷逆接釉与工 作头配接并使工作头处于位于收容孔内的工作位置； 在第二位置， 所述连接 轴使工作头处于位于工作头支撑机构的收容位置并能够与工作头轴向分离； 所述动力工具还包括邻接工作头支撑机构设置的导回装置， 所述连接轴从第 一位置向第二位置运动， 所述工作头在导回装置的作用下与连接轴轴向分离 并保持在收容位置。
优选的， 所述导回装置包括与工作头支撑机构接触的支撑面以及与支撑 面相连的导向面， 所述工作头支撑机构位置调整能够带动与连接轴接合的工 作头在导向面的作用下与连接轴分离。
优选的， 所述工作头支撑机构和传动机构设置有盖板， 所述支撑面和导 向面设置于盖板上。
优选的， 所述盖板上沿着工作头随着工作头支撑机构位置调整的运动轨 迹设有台阶凸起， 所述支撑面和导向面设置于台阶凸起上。
优选的， 所述盖板上对应连接轴的位置设有穿孔， 所述导向面自穿孔处 向外高度递增。
优选的， 所述导向面设有两个， 两个导向面位于工作头随着工作头支撑 机构位置调整的运动轨迹上并分布于穿孔两侧。
优选的， 所述导向面围绕所述穿孔的一周设置。
优选的， 所述导向面为斜面。
优选的， 所述斜面相对于存储夹端面的倾斜角度在 10度到 30度之间。 优选的， 所述工作头支撑机构可旋转的支撑在机壳和所述盖板之间。 优选的， 所述连接轴连接在传动机构和输出轴之间， 所述传动机构通过 所述连接轴将马达输出的旋转动力传递给输出轴。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过简单的 结构使连接轴与工作头分离， 并使工作头保持在工作头支撑机构内， 确保了 较高的可靠性， 同时减低了成本。
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠、 通用性强 的动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 若干个工作头之一的工作腔， 所述输出轴可旋转的支撑在所述机壳上并且相 , , ,
对于机壳釉向固定； 传动机构， 设置在马达和输出轴之间升可将马 ¾输出的 旋转动力传递给输出轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容 若干个并列设置的工作头的收容仓； 连接轴， 所述连接轴能够在穿过收容仓 与若干个工作头之一配接的工作位置以及与所述若干个工作头之一分开的释 放位置之间轴向运动；所述连接轴的一端与所述传动机构可传递扭矩的连接， 所述连接轴的另一端能够与所述输出轴连接并驱动输出轴旋转。
优选的， 所述动力工具还包括可滑动的连接在机壳上的操作件， 所述操 作件能够带动所述连接轴轴向运动。
优选的， 所述存储夹的一部分收容在所述机壳内， 另一部分被所述操作 件覆盖并且随着操作件移动而露出。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述存储夹可旋转的支撑在机壳内并位于传动机构和输出轴之 间。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过连接轴 间接带动工作头旋转的方式减小了扭矩传输的距离， 确保了较高的可靠性， 并且适用于标准的工作头， 通用性较高。
针对现有技术的不足， 本发明的目 的在于提供一种操作方便且密封性好 的动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 ^ , , ,
壳； 马 ¾ , 设置在机壳内， 并输出旋转动力； 输出轴， 具有釉向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 存储夹， 设置于机壳内， 所述存储夹包括用于收容若 干个并列设置的工作头的收容仓； 连接轴， 所述连接轴能够在穿过收容仓与 若干个工作头之一配接并使若干个工作头之一位于收容孔内的工作位置以及 与所述若干个工作头之一分开的释放位置之间轴向运动； 所述动力工具还包 括活动连接在机壳上的操作件， 所述操作件能够在两个位置之间运动， 在第 一位置， 所述连接轴处于工作位置， 所述操作件与机壳抵接并覆盖所述存储 夹的一部分， 在第二位置， 所述连接轴处于释放位置， 所述操作件与机壳间 隙设置并露出所述存储夹的一部分。
优选的， 所述操作件和机壳二者之一上沿连接轴轴向设有导向槽， 所述 操作件和机壳二者之另外一个上设有与导向槽相配的导轨， 所述操作件通过 所述导轨在导向槽内滑动而相对于机壳沿连接轴轴向运动。
优选的， 所述操作件带动所述连接轴轴向运动。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述连接轴的一端与所述传动机构可传递扭矩的连接， 所述连 接轴的另一端能够与所述输出轴连接并通过输出轴驱动工作头旋转。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
优选的， 所述机壳上部设有敞开部， 所述存储夹的一部分自所述敞开部 露出。 , , , 与现有抆水相比， 本发明的有益效果是： 本发明的动力工具在工作过程 中有效的密封， 而且通过操作件也实现了操作连接轴的移动， 操作方便。
针对现有技术的不足， 本发明的目 的在于提供一种操作方便的动力工具。 本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机 构具有用于支撑工作头的若干个并列设置的收容空间， 所述工作头支撑机构 能够被调整到其中一个收容空间与输出轴轴向对应的位置； 连接轴， 设置于 机壳内， 所述连接轴能够在两个位置间运动以带动工作头处于位于收容孔内 的工作位置或位于工作头支撑机构的收容位置；所述传动机构包括自锁装置， 所述自锁装置用于将马达的旋转动力单向传递给输出轴。
优选的， 所述传动机构包括由马达驱动的行星齿轮减速机构以及由行星 齿轮减速机构驱动的齿轮机构， 所述自锁装置设置在所述行星齿轮减速机构 与齿轮机构之间。
优选的， 所述自锁装置包括与所述齿轮减速机构连接并用来驱动所述齿 轮机构的转接盘， 相对所述壳体固定连接的固定盘， 用来连接所述转接盘和 固定盘实现单向传动的中间传递机构。
优选的， 所述行星齿轮减速机构包括输出端行星架， 所述转接盘上设有 外花键， 所述外花键与设于输出端行星架上的内花键连接。
优选的， 所述外花键与所述内花键沿周向为松配合。
优选的， 所述中间传递机构包括沿周向设置于转接盘外表面上的至少一 个平面、 固定盘的内圆面及位于所述平面和所述固定盘内圆面之间的至少一 个滚柱。
优选的， 所述输出端行星架包括多个支脚延伸于所述平面与内圆面之间， 所述滚柱位于相邻的两个支脚之间。
优选的， 所述固定盘的外表面上设有凸起用来与所述壳体固定连接。 优选的， 所述齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 用于驱动所述输出轴的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二 齿轮。
优选的， 所述连接轴连接在传动机构和输出轴之间， 所述传动机构通过 ，
所迷逆接釉将马达输出的旋转动力传递给输出轴。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过设置自 锁装置使动力工具适于多种模式操作， 方便操作者在多种场合使用。
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠、 使用寿命 长的动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机 构具有用于支撑工作头的若干个并列设置的收容空间， 所述工作头支撑机构 能够被调整到其中一个收容空间与输出轴轴向对应的位置； 连接轴， 设置于 机壳内， 所述连接轴能够在两个位置间运动以带动工作头处于位于收容孔内 的工作位置或位于工作头支撑机构的收容位置； 所述连接轴具有用于配接工 作头的工作端以及与工作端相对的支撑端， 所述动力工具还包括用于至少在 工作头处于工作位置时与所述支撑端轴向相抵的支撑元件， 所述工作头和工 作端之间或者所述支撑元件和支撑端之间为点接触。
优选的， 所述支撑元件轴向固定于所述支撑端， 所述支撑端可旋转的支 撑在支撑元件上。
优选的， 所述连接轴能够沿轴向移动， 所述动力工具还包括连接于机壳 上并可操作的驱动所述连接轴运动的操作件。
优选的， 所述操作件与所述支撑元件相连， 所述操作件通过所述支撑元 件驱动所述连接轴。
优选的， 所述操作件沿着所述连接轴轴向运动至少具有两个行程， 在第 一个行程内， 所述操作件带动所述连接轴一起运动； 在第二个行程内， 所述 连接轴相对于机壳固定， 所述操作件相对于机壳运动。
优选的， 所述操作件上沿连接轴轴向固定设有位于所述支撑元件两侧的 第一凸块和第二凸块， 所述支撑元件能够在第一凸块和第二凸块之间沿连接 轴轴向运动。
优选的， 所述支撑元件为四方型元件。
优选的， 所述操作件上固定设有伸入所述四方型元件中部的凸块， 所述 凸块能够相对于连接轴轴向在四方型元件的两侧边之间移动。 , , ,
优逸的， 所述动力工具还包括设置在机壳和连接轴之间的限位块， 所述 限位块可操作地在两个位置间运动， 在第一位置， 所述限位块与所述支撑元 件相抵并限制连接轴向远离工作头的方向运动， 在第二位置， 所述限位块与 所述支撑元件分离并允许连接轴向远离工作头的方向运动。
优选的， 所述连接轴连接在传动机构和输出轴之间， 所述传动机构通过 所述连接轴将马达输出的旋转动力传递给输出轴。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过旋转支 撑点接触的方式使工作头与连接轴或者连接轴与支撑元件之间的摩擦减小， 确保了工具较长的使用寿命， 同时减低了成本。
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠、 结构紧凑 的动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机 构具有用于支撑工作头的若干个并列设置的收容空间， 所述工作头支撑机构 能够被调整到其中一个收容空间与输出轴轴向对应的位置； 连接轴， 设置于 机壳内， 所述连接轴能够在两个位置间运动以带动工作头处于位于收容孔内 的工作位置或位于工作头支撑机构的收容位置； 所述传动机构包括由马达驱 动的行星齿轮减速机构以及由行星齿轮减速机构驱动的齿轮机构， 所述行星 齿轮减速机构包括用于驱动所述齿轮机构的输出端行星架， 所述齿轮机构包 括与所述输出端行星架的旋转轴线同轴设置的第一齿轮、 与所述输出轴的旋 转轴线同轴设置的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
优选的， 所述第一齿轮、 第二齿轮和第三齿轮的旋转中心位于同一条直 线上。
优选的， 所述第二齿轮的旋转中心相对于第一齿轮和第三齿轮的旋转中 心连线偏心设置。
优选的， 所述第二齿轮相对于第一齿轮和第三齿轮的旋转中心连线的偏 心尺寸是第一齿轮分度圆直径的 0.1倍到 0.3倍之间。
优选的， 所述第一齿轮的分度圆直径小于输出轴旋转轴线到马达旋转轴 ,
线距禹的二分之一。
优选的， 所述第二齿轮的分度圆直径小于第一齿轮的分度圆直径。
优选的， 所述第一齿轮的分度圆直径是第二齿轮的分度圆直径的 1 .1至 1.5倍之间。
优选的， 所述第一齿轮到第二齿轮的传动为增速传动， 所述第二齿轮到 第三齿轮的传动为减速传动。
优选的， 所述第一齿轮传动到第三齿轮的传动比为 1 : 1。
优选的， 所述连接轴连接在第三齿轮和输出轴之间， 所述第三齿轮通过 所述连接轴将马达输出的旋转动力传递给输出轴。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过合理设 置齿轮机构， 确保了传动过程中较高的可靠性， 同时结构紧凑确保了工具的 小型化。
针对现有技术的不足， 本发明的目 的在于提供一种工作可靠的动力工具。 本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 机壳； 马 达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳工作头 的收容孔， 所述工作头柄部的截面为规则的多边形； 传动机构， 设置在马达 和输出轴之间并可将马达输出的旋转动力传递给输出轴； 所述收容孔内设有 扭矩传递部和校正部， 所述扭矩传递部为至少一个径向凸起， 所述至少一个 径向凸起与所述工作头的其中一面抵靠并限制工作头相对于输出轴旋转， 所 述校正部为设置于收容孔内的斜面， 所述工作头与所述斜面接触并在斜面的 作用下带动输出轴或者工作头旋转以使得所述收容孔与工作头相配。
优选的， 所述径向凸起沿输出轴轴向延伸并与所述斜面连接在一起。 优选的， 所述径向凸起设有十二个， 沿所述输出轴的圆周方向均匀分布。 优选的， 所述径向凸起为内接于所述收容孔的十二角形的其中至少一个 角。
优选的， 所述收容孔内临近所述斜面的一端还设有导向部， 所述导向部 为内径大于收容孔内径的内台阶， 所述内台阶沿轴向的高度等于斜面沿轴向 的高度。
优选的， 所述收容孔内还设有与所述径向凸起相对的沉槽， 沉槽具有与 收容孔相连的底面及两个侧面， 所述两个侧面沿着圆周方向倾斜。
优选的， 所述沉槽与所述内台阶沿输出轴轴向相通。 , , ^ , , 优逸的， 所述动力工具还包括设置于机壳内的存储夹， 所迷存储夹包括 用于收容若干个并列设置的工作头的收容仓， 所述连接轴能够在穿过收容仓 与若干个工作头之一配接的工作位置以及与所述若干个工作头之一分开的释 放位置之间轴向运动。
优选的， 所述连接轴的一端与所述传动机构可传递扭矩的连接， 另一端 能够与所述输出轴连接并驱动输出轴旋转。
优选的， 所述动力工具还包括可滑动的连接在机壳上的操作件， 所述操 作件能够带动所述连接轴轴向运动。
优选的， 所述存储夹的一部分收容在所述机壳内， 另一部分被所述操作 件覆盖并且随着操作件移动而露出。
优选的， 所述机壳沿连接轴轴向可分为设有马达的马达部， 设有传动机 构的传动部， 设有存储夹的存储部， 所述连接轴处于工作位置时， 所述操作 件轴向与所述传动部和存储部重叠； 所述连接轴处于释放位置时， 所述操作 件轴向与所述马达部重叠， 与所述传动部部分重叠。
优选的， 所述存储夹可旋转的支撑在机壳内并位于传动机构和输出轴之 间。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述齿轮箱和存储夹之间设有齿轮箱盖板。
优选的， 所述存储夹可旋转的支撑在机壳和齿轮箱盖板之间。
优选的， 所述传动机构包括与马达相连的行星齿轮减速机构以及与所述 连接轴相连的小齿轮机构， 所述齿轮箱内设有位于所述行星齿轮减速机构与 所述小齿轮机构之间的隔板。
优选的， 所述小齿轮机构包括与所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同时与第一齿轮和第三齿轮啮合的第二齿 轮。
本发明解决其技术问题所釆用的另一种技术方案是： 一种动力工具， 包 括： 机壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置 的容纳工作头的收容孔， 所述工作头具有截面为多边形的扭矩受力部； 传动 机构， 设置在马达和输出轴之间并可将马达输出的旋转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机构具有用于支撑工作头 的若干个并列设置的收容空间； 连接轴， 设置于机壳内并能够使工作头处于 , , , 位于收容孔內的工作位置或位于工作头支撑机构的收容位置； 所迷收容孔包 括扭矩传递部和校正部，所述扭矩传递部能够限制工作头相对于输出轴旋转， 所述输出轴上设有弹性抵压装置， 所述弹性抵压装置至少部分伸入所述校正 部内， 当工作头由校正部进入扭矩传递部， 所述工作头受弹性抵压装置的作 用能够相对输出轴旋转。
优选的， 所述扭矩传递部包括至少一个径向凸起， 所述至少一个径向凸 起与所述扭矩受力部抵靠并限制工作头相对于输出轴旋转。
优选的， 所述扭矩传递部包括十二个均勾设置的径向凸起， 所述十二个 径向凸与所述扭矩受力部接触并限制工作头相对于输出轴旋转， 所述弹性抵 压装置伸入所述校正部的部分与所述十二个径向凸起中的两个相邻的径向凸 起的接合部沿轴向的延伸线对齐。
优选的， 所述扭矩传递部包括六个径向凸起， 所述六个径向凸起为十二 角星形其中的径向相对的均勾设置的六个角， 所述弹性抵压装置伸入所述校 正部的部分与所述六个径向凸起中的一个沿轴向的延伸线对齐。
优选的， 所述六个径向凸起的每两个径向凸起之间通过圆弧过渡。
优选的， 所述扭矩传递部为截面与所述扭矩受力部的截面相配的正多边 形， 所述弹性抵压装置伸入所述校正部的部分与扭矩传递部的至少一面沿轴 向的延伸面对齐。
优选的， 所述扭矩传递部的截面与所述扭矩受力部的截面为相配的正六 边形。
优选的， 所述弹性抵压装置包括部分伸入所述校正部内的抵压件以及弹 性元件， 所述弹性元件沿输出轴径向向内偏压所述抵压件。
优选的， 所述弹性元件为围绕所述输出轴设置的 C型弹片， 所述抵压件 设置于所述 C型弹片开口的两侧。
优选的， 所述弹性元件为沿输出轴轴向设置的弹片， 所述弹片的一端相 对于机壳固定， 所述弹片的另一端偏压所述抵压部。
优选的， 所述弹性抵压装置包括弹性元件， 所述弹性元件具有伸入所述 校正部内的抵压部， 所述抵压部能够在所述弹性元件处于自 由状态和偏压状 态之间沿输出轴径向运动。
优选的， 所述弹性元件包括至少一个位于围绕所述输出轴设置的 C型钢 丝， 所述 4民压部设置于所述 C型钢丝开口的两侧。 , ,
优逸的， 所述 C型钢丝设置两个， 沿着输出轴轴向间隔分布。
优选的， 所述两个 C型钢丝的两个抵压部沿周向错开设置。
优选的， 所述弹性元件为沿输出轴轴向设置的弹片， 所述弹片的一端相 对于机壳固定， 所述抵压部设置于所述弹片的另一端。
优选的， 所述连接轴连接在传动机构和输出轴之间， 所述传动机构通过 所述连接轴将马达输出的旋转动力传递给输出轴。
本发明解决其技术问题所釆用的再一种技术方案是： 一种动力工具， 包 括： 机壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置 的容纳工作头的收容孔， 所述工作头具有截面为多边形的扭矩受力部； 传动 机构， 设置在马达和输出轴之间并可将马达输出的旋转动力传递给输出轴； 工作头支撑机构， 设置于机壳内， 所述工作头支撑机构具有用于支撑工作头 的若干个并列设置的收容空间； 连接轴， 设置于机壳内并能够使工作头处于 位于收容孔内的工作位置或位于工作头支撑机构的收容位置； 所述输出轴上 设有与所述收容孔径向连通的收容槽， 所述收容槽内收容有至少部分伸入到 所述收容孔的锁紧件， 所述输出轴能够沿轴向在第一位置和第二位置之间运 动， 在第一位置， 所述锁紧件能够沿输出轴径向运动， 从而所述锁紧件允许 工作头相对于输出轴旋转； 在第二位置， 所述锁紧件被限制沿输出轴径向运 动， 从而所述锁紧件限制工作头相对于输出轴旋转。
优选的， 所述动力工具还包括向第二位置抵压所述输出轴的弹性元件。 优选的， 所述输出轴外相对于机壳轴向固定套设有限位件， 所述限位件 上相邻设置有与所述锁紧件配合的卡定部和释放部， 在所述第一位置， 所述 锁紧件能够与释放部啮合， 在第二位置， 所述锁紧件与卡定部啮合。
优选的， 所述弹性元件套设在输出轴上并且沿轴向位于所述输出轴和所 述限位件之间。
优选的， 所述连接轴连接在传动机构和输出轴之间， 所述传动机构通过 所述连接轴将马达输出的旋转动力传递给输出轴。
优选的， 所述收容槽包括沿输出轴轴向间隔设置的第一收容槽和第二收 容槽， 所述锁紧件包括收容在第一收容槽内的第一锁紧件和收容在第二收容 槽内的第二锁紧件， 在第一位置， 所述第一锁紧件允许工作头相对于输出轴 旋转， 所述第二锁紧件允许连接轴相对于输出轴旋转； 在第二位置， 所述第 一锁紧件限制工作头相对于输出轴旋转， 所述第二锁紧件限制连接轴相对于 输出釉旋转。
优选的， 所述连接轴邻近输出轴的一端设有磁铁。
优选的， 所述工作头支撑机构可旋转的支撑在输出轴和传动机构之间。 优选的， 所述机壳上设置有操作件， 所述操作件可操作的带动连接轴轴 向运动以使工作头位于工作位置或收容位置。
优选的， 所述操作件活动连接在所述机壳上， 并且所述操作件能够相对 于机壳沿输出轴轴向移动。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具通过简单的 结构使工作头更换的过程中工作头能够顺利的进入输出轴， 确保了较高的可 靠性， 同时减低了成本。
针对现有技术的不足， 本发明的目 的在于提供一种操作简单、 效率高的 动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 连接轴， 与若干个工作头之一 配接并用于驱动所述若干个工作头之一旋转； 传动机构， 设置在马达和连接 轴之间并可将马达输出的旋转动力传递给连接轴； 存储夹， 部分收容于所述 机壳内， 所述存储夹包括用于收容若干个并列设置的工作头的收容仓， 所述 连接轴能够在穿过收容仓与若干个工作头之一配接的工作位置以及与所述若 干个工作头之一分开的释放位置之间轴向运动； 所述机壳上设有敞开部， 所 述连接轴位于所述释放位置时， 所述存储夹能够经所述敞开部从所述机壳中 移除。
优选的， 所述动力工具还包括设置于机壳上的操作件， 所述操作件能够 带动所述连接轴一起轴向运动， 所述存储夹的另一部分被所述操作件覆盖并 且随着操作件移动而露出。
优选的， 所述机壳的内壁上设有沿连接轴轴向延伸的支撑筋， 所述存储 夹可旋转的支撑在支撑筋上。
优选的， 所述机壳上设有与所述敞开部径向相对的开孔。
优选的， 所述机壳上安装有封闭所述开孔的弹性片。
优选的， 所述弹性片为橡胶软垫。
优选的， 所述开孔内设有能够相对连接轴径向移动的按钮。
优选的， 所述存储夹临近传动机构的端面上设有若干个沿存储夹周向分 ^ , ^_ , ( A , ^ A ^ ,
布的定位槽， 所述机壳内设有能够与若干个定位槽中的一个配合的弹性定位 件，所述弹性定位件设置于所述机壳的底部且与所述敞开部径向相对的位置。
优选的， 所述若干个定位槽中的至少一个沿着所述存储夹的径向与存储 夹的圆周面连通。
优选的， 所述动力工具还包括输出轴， 所述输出轴具有轴向设置的容纳 工作头的收容孔， 所述工作头柄部的截面为规则的多边形， 所述连接轴与所 述输出轴连接并驱动输出轴带动工作头旋转。
优选的， 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内， 所述存储夹的直径小于齿轮箱的径向尺寸。
与现有技术相比， 本发明的有益效果是： 本发明的动力工具的工作头存 储夹可以不借助工具直接从机壳上移除， 操作简单， 更换不同的工作头时快 速， 从而工作效率高。
针对现有技术的不足， 本发明的目 的在于提供一种易于分辨工作头位置 的存储夹。
本发明的另一个目 的在于提供一种操作简单、 效率高的动力工具。
本发明解决其技术问题所釆用的技术方案是： 一种用于收容工作头的存 储夹， 包括主体， 所述主体具有旋转轴线， 所述主体上设有若干个用于收容 工作头的收容仓， 所述若干个收容仓平行于所述旋转轴线并且围绕所述旋转 轴线均勾设置， 所述主体具有环绕所述若干个收容仓的外周壁， 所述外周壁 上设有表示不同工作头的识别装置，所述识别装置与所述收容仓的位置对应。
优选的， 所述识别装置包括表示不同工作头形状的文字、 符号或图形或 其组合。
优选的， 所述识别装置包括表示不同工作头型号的文字、 符号或图形或 其组合。
优选的， 所述识别装置通过印刷、 成型、 镶嵌或者粘贴的其中一种方式 固定在所述主体的外周壁上。
优选的， 所述主体的外周壁上设有若干个平行于主体轴向的凸起或者凹 槽。
优选的， 所述识别装置相对于主体轴向位于所述外周壁的一端， 所述凸 起或者凹槽相对于主体轴向位于所述外周壁的另一端。
优选的， 所述识别装置可移除的安装于所述主体的外周壁上。 , ,
优逸的， 所述主体的端面上设有与所述若干个收容仓对应的若干个定位 槽。
优选的， 所述若干个定位槽中的任何一个沿着所述主体的径向与所述主 体的外周壁连通。
本发明解决其技术问题所釆用的技术方案是： 一种动力工具， 包括： 机 壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置的容纳 工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输出的旋 转动力传递给输出轴； 连接轴， 设置于机壳内并可操作使工作头处于位于收 容孔内的工作位置； 所述动力工具还包括如前所述的存储夹， 所述连接轴还 可操作使工作头处于位于存储夹内的收容位置。
本发明解决其技术问题所釆用的另一种技术方案是： 一种用于收容工作 头的存储夹， 包括主体， 所述主体具有旋转轴线， 所述主体上设有若干个用 于收容工作头的收容仓， 所述若干个收容仓平行于所述旋转轴线并且围绕所 述旋转轴线均勾设置， 所述主体具有环绕所述若干个收容仓的外周壁， 所述 外周壁至少部分由透明材料制成。
优选的， 所述外周壁封闭所述若干个收容仓的部分由透明材料制成。 优选的， 所述由透明材料制成的透明部分位于主体轴向的一端。
优选的， 所述透明部分沿主体轴向的长度小于主体长度的二分之一。 优选的， 所述透明部分可拆卸的安装于主体上。
优选的， 所述透明部分为圆环状。
优选的， 所述外周壁全部由透明材料制成。
优选的， 所述主体全部由透明材料制成。
优选的， 所述主体的外周壁上设有若干个平行于主体轴向的凸起或者凹 槽。
优选的， 所述主体的端面上设有与所述若干个收容仓对应的若干个定位 槽。
优选的， 所述若干个定位槽中的任何一个沿着所述主体的径向与所述主 体的外周壁连通。
本发明解决其技术问题所釆用的另一种技术方案是： 一种动力工具， 包 括： 机壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置 的容纳工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输 , ^ ,
出的旋转动力传递给输出轴； 连接轴， 设置于机壳内并可搮作使工作头处于 位于收容孔内的工作位置； 所述动力工具还包括如前所述的存储夹， 所述连 接轴还可操作使工作头处于位于存储夹内的收容位置。
本发明解决其技术问题所釆用的再一种技术方案是： 一种用于收容工作 头的存储夹， 包括主体， 所述主体具有旋转轴线， 所述主体上设有若干个用 于收容工作头的收容仓， 所述若干个收容仓平行于所述旋转轴线并且围绕所 述旋转轴线均勾设置， 所述主体具有环绕所述若干个收容仓的外周壁， 其特 征在于： 所述外周壁上设有视窗口， 所述视窗口 自外周壁的一端沿主体轴向 延伸， 所述视窗口与所述收容仓的位置对应并且与收容仓径向连通。
优选的， 所述视窗口沿主体轴向的长度小于主体长度的二分之一。
优选的， 所述视窗口沿主体轴向的长度是主体长度 0.3 ~0.4倍。
优选的， 所述视窗口沿主体周向的宽度是收容仓的直径的 0.7~0.9倍。 优选的， 所述主体上设有与主体的旋转中心同心的通孔。
优选的， 所述主体的外周壁上设有若干个平行于主体轴向的凸起或者凹 槽。
优选的， 所述主体上与所述视窗口相对的另一端面上设有与所述若干个 收容仓对应的若干个定位槽。
优选的， 所述若干个定位槽中的任何一个沿着所述主体的径向与所述主 体的外周壁连通。
本发明解决其技术问题所釆用的再一种技术方案是： 一种动力工具， 包 括： 机壳； 马达， 设置在机壳内， 并输出旋转动力； 输出轴， 具有轴向设置 的容纳工作头的收容孔； 传动机构， 设置在马达和输出轴之间并可将马达输 出的旋转动力传递给输出轴； 连接轴， 设置于机壳内并可操作使工作头处于 位于收容孔内的工作位置； 所述动力工具还包括如前所述的存储夹， 所述连 接轴还可操作使工作头处于位于存储夹内的收容位置。
与现有技术相比， 本发明的有益效果是： 本发明的存储夹通过识别装置、 透明部分或者视窗口能够快速的识别对应的收容仓中所装工作头的类型， 方 便操作者使用， 本发明的动力工具安装了上述存储夹， 在更换不同的工作头 时可以快速选择， 从而工作效率高。
附图说明
图 1是本发明优选的第一实施方式的动力工具处于工作状态时的剖视图。 ,
图 2是图 1 中动力工具的邵分立体分解图。
图 3是图 1 中动力工具沿 Ε-Ε线的剖视示意图。
图 4是图 3 中动力工具的小齿轮机构的另一种实施方式的剖视示意图。 图 5 是本发明优选的第二实施方式动力工具处于更换工作头状态时的剖 视图。
图 6是图 5 中动力工具的自锁装置部分的立体分解图。
图 7是图 5 中沿 F-F方向的剖视图。
图 8是图 7 中 自锁装置的使用状态参考图 （此时输出端行星架逆时针旋 转）。
图 9是图 7 中 自锁装置的使用状态参考图 （此时转接盘顺时针旋转）。 图 10是图 1 中动力工具的滑盖的立体图。
图 11是图 1 中动力工具的限位机构第一实施方式的示意图， 此时限位机 构处于锁定状态。
图 12是图 11 中动力工具的限位机构的右视示意图。
图 13与图 12相似， 其中限位机构处于解锁状态。
图 14是图 1 中动力工具的限位机构第二实施方式的示意图， 此时限位机 构处于锁定状态。
图 15与图 14相似， 其中限位机构处于解锁状态。
图 16是图 1 中动力工具的限位机构第三实施方式的示意图， 此时限位机 构处于锁定状态。
图 17与图 16相似， 其中限位机构处于解锁状态。
图 18是图 5 中动力工具的前壳的立体图。
图 19是本发明动力工具的存储夹可移除的另一种实施方式的示意图。 图 20是本发明动力工具的存储夹可移除的再一种实施方式的示意图。 图 21是本发明优选的存储夹的第一实施方式的立体图。
图 22是图 21 中存储夹的主视图。
图 23是沿图 22中沿 Ρ-Ρ线的剖视图。
图 24是本发明优选的存储夹的第二实施方式中的识别装置的一种结构形 式的示意图。
图 25是本发明优选的存储夹的第二实施方式的识别装置的另一种结构形 式的示意图。 , ^ , , , ^ ,
m 26是本发明优选的存储夹的第三买施方式中存储夹透明的一种结构形 式的示意图。
图 27是本发明优选的存储夹的第三实施方式中存储夹透明的另一种结构 形式的示意图。
图 28是图 1中动力工具更换工作头时限制工作头随着连接轴后退的第一 实施方式的示意图。
图 29是图 28 中阻挡件处于允许连接轴移动的位置的示意图。
图 30是图 28 中阻挡件处于限制工作头后退的位置的示意图。
图 31是图 1中动力工具更换工作头时限制工作头随着连接轴后退的第二 实施方式的示意图。
图 32是图 31 中阻挡件处于允许连接轴移动的位置的示意图。
图 33是图 31 中阻挡件处于限制工作头后退的位置的示意图。
图 34是图 1中动力工具更换工作头时限制工作头随着连接轴后退的第三 实施方式的示意图。
图 35是图 1中动力工具更换工作头时限制工作头随着连接轴后退的第四 实施方式的示意图。
图 36是图 35 中工作头被限制随着连接轴后退的工作原理示意图， 其中 连接轴带动工作头回到存储夹且连接轴离开存储夹。
图 37与图 36相似， 其中存储夹旋转， 工作头与导向面抵接。
图 38 与图 36相似， 其中存储夹旋转， 工作头在导向面的作用下与连接 轴轴向分离。
图 39是图 1 中动力工具的输出轴的第一实施方式的示意图。
图 40是图 39 中动力工具的输出轴的主视图。
图 41是图 1 中动力工具的输出轴的第二实施方式的示意图。
图 42是图 41 中动力工具的输出轴的主视图。
图 43是图 1 中动力工具的输出轴的第三实施方式的示意图。
图 44是图 43 中动力工具的输出轴的主视图。
图 45是本发明优选的第三实施方式中的动力工具处于工作状态时的剖视 图。
图 46是图 45 中动力工具的部分立体分解图。
图 47是图 45 中沿 Q- Q线的部分剖视图。 ,
48是本发明的动力工具的工作头的截面示意图。
图 49是图 45 中的动力工具的输出轴部分的右视示意图， 其中工作头还 未进入输出轴。
图 50与图 49相似， 其中工作头刚进入输出轴的校正部。
图 5 1 与图 49相似， 其中工作头在弹性抵压装置的作用下与输出轴发生 相对旋转。
图 52与图 49相似， 其中工作头进入输出轴的扭矩传递部。
图 53是本发明优选的另一种实施方式中的输出轴的扭矩传递部的轮廓示 意图。
图 54是图 53 中的输出轴的扭矩传递部形成示意图， 其中两个正六方形 相对旋转 30度。
图 55是图 53的输出轴部分的右视示意图， 其中工作头还未进入输出轴。 图 56与图 55相似， 其中工作头刚进入输出轴的校正部。
图 57与图 55相似， 其中工作头进入输出轴的扭矩传递部。
图 58是本发明优选的再一种实施方式中的输出轴的扭矩传递部的轮廓示 意图。
图 59是本发明优选的使用图 58 中的输出轴的动力工具处于更换工作头 状态时的剖视图。
图 60是图 59 中沿 R-R线的部分剖视图， 其中工作头还未进入输出轴。 图 61 是图 58 中的输出轴部分的右视示意图， 其中工作头刚进入输出轴 的校正部。
图 62 与图 61 相似， 其中工作头在弹性抵压装置的作用下与输出轴发生 相对旋转。
图 63与图 61相似， 其中工作头进入输出轴的扭矩传递部。
图 64是本发明优选的第四实施方式中的动力工具处于工作状态时的部分 剖视图。
图 65是图 64中动力工具的部分立体分解图。
图 66是本发明优选的第五实施方式中的动力工具处于工作状态时的部分 剖视图。
图 67是本发明优选的第六实施方式中的动力工具处于工作状态时的部分 剖视图。 , ,
68是本发明优选的第七买施方式中的动力工具处于工作状态时的邵分 剖视图， 其中工作头刚刚进入输出轴的校正部。
图 69与图 68相似， 其中工作头越过第一锁紧件。
图 70与图 68相似 其中工作头越过第二锁紧件。
图 71 与图 68相似 其中连接轴越过第一锁紧件。
图 72与图 68相似 其中输出轴复位并能够带动工作头旋转。
其巾，
1.机壳 11.手柄 13.前壳
131.开孔 132.支撑筋 133.敞开部
134.径向通孔 135.橡胶软垫 15.导向槽
2.马达 21.电机轴 22.齿轮箱
221.隔板 223.齿轮箱盖板 2231.穿孔
2232.台阶凸起 2233.导向面 2233a.导向面
225.拱形件 3.传动机构 30.小齿轮机构
301.第一齿轮 302.第二齿轮 303.第三齿轮
308.齿轮轴 31.行星齿轮减速机构 313.输出端行星架 3131 支脚 3181.扁平部 321.固定盘
3211 固定引脚 3212 内圆面 322.转接盘
3221平面 3222扁方孔 3223花键齿
323.滚柱 4.输出轴 40.套筒
41、 41a, 41b.收容孔 41.通孔 411.底面
413.侧边 42.径向凸起 421.斜面
43.内台阶 45.沉槽 461、 461a.扭矩传递部 462、 462a.校正部 463、 463a.径向通孔 464. C型弹片
465.抵压件 465a.凸出部 466. C型钢丝
467、 467a.弹片 468.弯折部 48.限位件
481.第一卡定部 482.第一释放部 483.第一收容槽
487.第二收容槽 488.第二锁紧件 489.弹性元件
50.固定块 51.连接轴 511.磁铁 484.第一锁紧件 485.第二卡定部 486.第二释放部
512.环形凹槽 512.支撑端 52.存储夹
521 .收容仓 522.视窗口 522.压板
523.开口 523.识别装置 524.透明环
526. U型槽 528.定位槽 53.滑盖
53 1 .导轨 532.解锁块 533.斜面
535.第一凸块 536.第二凸块 537.防滑条
54.定位件 56. U型弹簧 57.弹片
57 1 .弹性末端 6.电池 7.按钮开关
8、 8 a、 8b .限位机构 81、 81 a、 8 1b .限位块 8 13.侧面
82、 82a.销轴 83.扭簧 83b .弹簧
9.工作头
具体实施方式
在本发明动力工具的优选实施方式中， 动力工具为动力螺丝刀， 根据动 力源的不同可分为气动螺丝刀、 液动螺丝刀和电动螺丝刀， 电动螺丝刀里也 有直流和交流之分， 本发明优选以直流电动螺丝刀为例进行具体说明。
参照图 1和图 2所示， 该直流电动螺丝刀包括机壳 1、 马达 2、 电池 6、 传动机构 3、 连接轴 51、 工作头支撑机构和输出轴 4。 机壳 1 由左右对称的 两个半壳体通过螺钉 （未图示） 合拢组装而成， 其具有水平部分和与水平部 分呈飩角 K设置的手柄 11部分，本发明优选的角度 K在 100度到 130度之间， 这样握持手柄 11操作时会比较舒适。 在手柄 1 1部分的上部设有按钮开关 7 , 电池 6 固定在手柄 11部分的后部， 传动机构 3收容在机壳 1 的水平部分内。 作为优选的实施方式， 该电池 6可以是锂离子电池。 需要说明的是， 这儿所 说的锂离子电池是负极材料为锂元素的可充电电池的总称， 依据正极材料的 不同， 其可构成许多体系， 如 "锂锰" 电池， "锂铁" 电池等。 在本实施方式 中， 锂离子电池为一节额定电压为 3.6V (伏） 的锂离子电池。 当然， 电池 6 也可以是镍镉、 镍氢等本领域技术人员熟知的电池类型。
传动机构 3 由后向前 （以图面的右侧为后） 包括由马达 2驱动的行星齿 轮减速机构 31 和小齿轮机构 30 , 其中小齿轮机构 30与连接轴 5 1相连， 并 通过连接轴 51将马达 2的旋转运动传递给输出轴 4。 其中工作头支撑机构用 , , ,'
于储藏不同的工作头，这里的工作头主要指电动螺丝刀常用的十芋螺丝批头、 一字螺丝批头、 钻头等， 通过操作连接轴 51轴向移动穿过工作头支撑机构或 者离开工作头支撑机构， 并且调整工作头支撑机构的位置， 就可以在电动螺 丝刀拧紧或松开不同的螺钉时快速更换不同的工作头。
根据以上电动螺丝刀的组成， 电动螺丝刀可依次由后向前 （ 以图面的右 侧为后） 分成设置马达的马达部 D , 设置传动机构 3 的传动部 C , 设置存储 夹的存储部 Β 以及设置输出轴的输出部 Α。
本发明优选实施方式中的马达 2 为电机， 电机具有自 电机壳体向前延伸 出的电机轴 21。 电机固定在机壳 1 中， 一齿轮箱 22 固定在机壳 1 内并位于 电机的前部， 齿轮箱 22用于收容行星齿轮减速机构 31和小齿轮机构 30 , 通 过在行星齿轮减速机构 3 1和小齿轮机构 30之间设置隔板 221将二者隔开， 而齿轮箱 22和工作头支撑机构之间设置齿轮箱盖板 223 , 这样可将传动机构 3 与工作头支撑机构隔开， 即传动机构 3 和工作头支撑机构是相互独立的。 小齿轮机构 30 包括与行星齿轮减速机构 3 1通过一齿轮轴 308可传递扭矩连 接的第一齿轮 301 , 与连接轴 51连接的第三齿轮 303以及与第一齿轮 301和 第三齿轮 303 同时啮合的第二齿轮 302 ,其中齿轮轴 308可以和第一齿轮 301 一体设置， 第二齿轮 302将第一齿轮 301 的旋转传递给第三齿轮 303 , 每个 齿轮的两端通过轴套进行支撑。 隔板 221 的中部设有供第一齿轮 301 的轴穿 过的孔， 隔板 221 的端面设有用于安装轴套的凹槽， 支撑小齿轮机构 30的后 轴套固定在隔板 221 上， 前轴套固定在齿轮箱盖板 223上， 齿轮箱盖板 223 与齿轮箱 22可通过螺钉、 卡扣等固定相连， 如此， 即可以把小齿轮机构 30 与行星齿轮减速机构 3 1分开， 同时又可以将两者封闭， 防止灰尘、 粉末等进 入传动机构 3 内部， 也能够防止润滑油的泄漏。
参照图 3 , 第一齿轮 301、 第二齿轮 302和第三齿轮 303的中心线设置于 同一条直线上， 为了使传动更加平稳， 从第一齿轮 301 传动到第三齿轮 303 的传动比为 1 : 1 , 这样可以是第一齿轮 301 到第二齿轮 302 为增速传动， 第 二齿轮 302到第三齿轮 303为减速传动， 如第一齿轮 301和第三齿轮 303的 分度圆直径相等， 第二齿轮 302的分度圆直径小于第一齿轮 301和第三齿轮 303 的分度圆直径， 如此设置可以保证三个齿轮中心同轴时的最优布局， 占 用的空间最小。 但是若电动螺丝刀比较小型化时， 第二齿轮 302设置的较小 可能需要设置较少的齿数， 导致齿轮间同时啮合的齿数变少， 传动副强度下 t
降使得传动不稳定。 如取消第二齿轮 302 , 将第一齿轮 301 和第三齿轮 303 设置成直接啮合， 也能传递运动， 但这样必须增大第一齿轮 301和第三齿轮 303的直径， 而第一齿轮 301、 第三齿轮 303设置的较大势必增大电动螺丝刀 的体积。 为此， 参照图 4 , 可以将第二齿轮 302相对于第一齿轮 301 和第三 齿轮 303的旋转中心连线偏心设置， 这样既保证了第二齿轮 302的尺寸不会 过小， 同时三个齿轮并列排布方向的尺寸也不会过大， 可以保证三个齿轮之 间的传动比较平稳， 优选的偏心尺寸 L是第一齿轮 301分度圆直径的 0.1倍 到 0.3倍之间， 另外第一齿轮 301 的分度圆直径是第二齿轮 302的分度圆直 径的 1.1 至 1.5 倍之间， 保证三个齿轮之间承载能力较高， 而且效率高， 寿 命长。 另外， 设置三个齿轮可以使工具的内部空间更加紧凑， 从而不影响外 部的美观。
当然， 也可以根据需要设置成两个齿轮， 一个与行星齿轮减速机构 31相 连， 另一个与连接轴 51相连。 另外，传动机构 3并不局限于以上所述的形式， 传动机构 3可以只包括行星齿轮减速机构 31 , 或者只包括小齿轮机构 30 , 或 者其他的旋转运动传递机构， 如棘轮机构、 涡轮机构等等。 其中行星齿轮减 速机构 31具有三级减速系统， 电机轴 21延伸与行星齿轮减速机构 31啮合， 行星齿轮减速机构 31将旋转运动传递给小齿轮机构 30 , 小齿轮机构 30带动 连接轴 51旋转， 连接轴 51再驱动输出轴旋转。 这样电机 2运行时， 通过行 星齿轮减速机构 31、 小齿轮机构 30 , 最终由输出轴 4输出。 由此可以看出， 本实施方式中的传动链为电机-传动机构 -连接轴-输出轴， 即连接轴作为传动 链的一部分。 另外， 减速机构由三级行星减速和两级平行轴减速系统构成来 获得所想要的输出转速， 在其他实施方式中， 视所需要输出的转速， 减速机 构可以只包括二级行星减速系统， 或者其他减速系统。
参照图 5、图 6、图 7所示，行星齿轮减速机构 31 包括输出端行星架 313。 电动螺丝刀在行星齿轮减速机构 31和小齿轮机构 30之间设置有自锁装置， 自锁装置包括一个固定盘 321 , 在固定盘 321 的圆周外侧均匀设置有若干个 固定引脚 3211 , 这些固定引脚 3211 与齿轮箱 22紧密连接为一体， 使固定盘 321相对于机壳 1及齿轮箱 22呈静止状态， 而在固定盘 321 的圆周内侧则形 成有内圆面 3212。 在内圆面 3212的范围内， 设置有一个转接盘 322 , 转接盘 322的中心部分设置扁方孔 3222。 齿轮轴 308—端连接第一齿轮 301 , 另一 端上设置成扁平部 3181 , 转接盘 322与齿轮轴 308通过扁方孔 3222及扁平 部 3181连接为一体， 因而可以同齿轮轴 308—起转动。 其中所釆用的连接方 式可以是本领域内技术人员惯用的花键连接以及容易想到的其它连接方式替 换。 自锁装置还包括自输出端行星架 313的端面向第一齿轮 301方向突出的 多个支脚 3131 , 支脚 3131 固定设置于输出端行星架 313上。
转接盘 322的圆周外侧形成有多个平面 3221 , 转接盘 322上靠近输出端 行星架 313的一端设置有连接部， 该连接部釆用花键齿 3223 , 转接盘 322通 过花键齿 3223与输出端行星架 313松配合。 固定盘 321和转接盘 322之间， 更具体的位置是固定盘 321 的内圆面 3212与转接盘 322的平面 3221之间分 别设有滚柱 323 , 滚柱 323抵靠内圆面 3212和平面 3221 , 并且可以在所处位 置上滚动。另外，每个滚柱 323之间都插设有输出端行星架 313的支脚 3131 , 也就是说， 支脚 3131设置于固定盘 321 的内圆面 3212与转接盘 322的外侧 圆面之间。 支脚 3131 与固定盘 321 的内圆面 3212和转接盘 322均为间隙配 合， 因此支脚 3131可以围绕转接盘 322的中心转动。
进一步参照图 8 , 当触发按钮开关 7 时， 以马达 2的旋转输出是逆时针 方向为例， 马达 2产生的旋转扭矩传递到输出端行星架 313上， 输出端行星 架 313相对与其花键配接的转接盘 322转过一定角度， 此时输出端行星架的 支脚 3131 随输出端行星架 313产生相应方向上的转动。 其中， 当支脚 3131 转动一段微小位移后，抵靠在滚柱 323上， 由于滚柱 323是从由内圆面 3212、 转接盘 322的平面 3221这二者之间形成的锲面的小端向大端运动，所以滚柱 323能被输出端行星架支脚 3131推动， 跟随输出端行星架 313转动， 直至输 出端行星架 313与转接盘 322的花键齿 3223侧面接触，此时输出端行星架的 支脚 3131 与滚柱 323带动转接盘 322—起旋转。 这样， 马达 2的旋转扭矩将 传递到与转接盘 322 固定连接的齿轮轴 308 上， 并进一步传递到第一齿轮 301 , 通过第二齿轮 302、 第三齿轮 303和连接轴 51传递到输出轴 4上， 从 而输出轴 4带动工作头 9旋转。
进一步参照图 9 , 当按钮开关 7 断开， 马达 2停止旋转而无旋转扭矩输 出。 此时， 无论操作者沿顺时针方向或者逆时针方向拧动输出轴 4或者收容 于输出轴 4 中的工作头 9 , 表现出来的将是齿轮轴 308会随着产生相应方向 的微小的转动， 由于齿轮轴 308与转接盘 322通过扁方连接为一体， 转接盘 322也将随齿轮轴 308产生相应方向上的转动。 而滚柱 323 由虚线所示的位 置滚动至实线所示位置， 由于滚柱 323是从由内圆面 3212、 转接盘 322的平 面 3221 这二者之间形成的锲面的大端向小端运动， 此时固定盘 321 平面 3221、 内圆面 3212、 与转接盘 322的平面 3221 三者之间相互锲紧， 齿轮轴
308 并不能带动输出端行星架支架 41 旋转， 即齿轮轴 308 进行了 自动锁定， 也就是说旋转运动无法从输出轴 4传递到输出端行星架 313。 由于自锁结构 的设置， 使得操作者可以选择手动旋转电动螺丝刀拧螺钉。 尤其适用于当电 动螺丝刀在电动模式下， 将螺钉拧至基本到位的情况下， 可通过按钮开关 7 使马达 2停止， 手动模式下， 旋转该电动螺丝刀将螺钉拧到位， 从而避免了 螺钉在电动模式下过拧而导致螺钉滑牙。 该电动螺丝刀可以说是一款手、 电 动一体的螺丝批， 操作方便且便于携带。
上述实施方式中 自锁装置设置在在行星齿轮减速机构 31 和小齿轮机构 30之间， 本领域技术人员很容易能够想到 自锁装置设置在马达 2和输出轴 4 之间的其他位置也可以实现马达 2到输出轴 4的单向传动， 如马达 2和行星 齿轮减速机构 31之间、 小齿轮机构 30之间和连接轴 51之间等等。 自锁装置 的结构形式也不局限于上述实施方式， 任何可以实现单向传动的自锁装置都 可以应用于本发明优选的电动螺丝刀上。
继续参照图 1和图 2 , 机壳 1上可滑动的连接有滑盖 53 , 滑盖 53能够带 动连接轴 51 轴向移动。 滑盖 53 的边缘设有导轨 531 , 相应的机壳 1上设有 导向槽 15 , 滑盖 53通过其导轨 531安装在导向槽 15 内可相对于机壳 1 沿轴 向滑动。 当然， 也可以是滑盖 53上设置导向槽， 机壳 1上设置导轨的方式使 得滑盖 53移动。
常用的标准工作头柄部的截面为正六方形， 即柄部形成为工作头的扭矩 受力部， 而输出轴 4具有轴向贯穿的收容孔 41 , 收容孔 41设置成与工作头 的扭矩受力部相配的六方孔的形式，其内安装工作头使工作头处于工作位置， 从而实现扭矩的传递。 当然， 工作头也可以是非标准的， 即扭矩受力部的截 面是多边形形状的， 相应的收容孔设置成与扭矩受力部相配的多边形， 都可 以实现扭矩的传递。 输出轴 4通过一轴套 40 支撑在前壳 13 的轴向开孔 131 内， 轴套 40 给输出轴 4 提供径向支撑， 当然也可以通过轴承实现输出轴 4 的径向支撑。 本发明的连接轴 51也为六方形， 第三齿轮 303 内设有六方孔， 用于与连接轴 51 配接并将旋转动力传递给连接轴 51 , 这样连接轴 51插入输 出轴 4能够带动输出轴 4旋转， 进而通过输出轴 4带动工作头 9旋转， 这样 可以使用标准的工作头 9 , 而且无需在连接轴 51上开设收容工作头 9的孔， 避免连接轴 51 直径过大增加整机的重量和体积。 这样， 直接带动工作头 9 ,
旋转的为输出轴， 缩短了扭矩传输的距离， 从而工具的使用吏加可靠。 以上 所述的为连接轴通过输出轴间接带动工作头旋转的方式， 但是， 本领域技术 人员很容易想到其他的传输方式来替代， 比如连接轴直接带动工作头旋转， 即连接轴直接与工作头以可传递扭矩的方式连接， 或者输出轴由齿轮直接驱 动， 而连接轴仅用于推出工作头和带动工作头回到存储夹， 也就是说传动链 为电机-传动机构 -输出轴， 即连接轴不作为传动链的一部分。
参照图 1、 图 2、 图 5和图 6所示， 连接轴 51 为六方轴， 连接轴 51上轴 向固定的设有一固定块 50 , 滑盖 53可通过与固定块 50相连的方式带动连接 轴 51移动。滑盖 53的内部沿连接轴 51轴向间隔设有第一凸块 535和第二凸 块 536 , 在电动螺丝刀的工作状态， 第一凸块 535与固定块 50轴向间隔有距 离 S , 当滑盖 53向后滑动， 即向着马达 2的方向滑动， 滑动了距离 S之后， 第一凸块 535与固定块 50轴向抵接，从而滑盖 53带动固定块 50继而带动连 接轴 51轴向向后； 在电动螺丝刀可更换工作头的状态， 第二凸块 536与固定 块 50轴向间隔有距离 S , 当滑盖 53向前滑动， 即向着输出轴 4的方向滑动， 滑动了距离 S之后， 第二凸块 536与固定块 50轴向抵接， 从而滑盖 53带动 固定块 50继而带动连接轴 5 1轴向向前移动。连接轴 5 1的前端设有磁铁 51 1 , 用于吸附工作头 9 , 当选择好工作头 9 时， 可操作滑盖 53 带动连接轴 51 穿 过工作头支撑机构， 工作头 9被连接轴 5 1 上的磁铁 5 1 1 吸附， 并在连接轴 51 的推动下离开工作头支撑机构， 进入输出轴 4。 当然， 滑盖 53带动连接轴 51移动的方式还有很多， 如可以在连接轴 5 1上设置环绕其外周一周的环槽， 滑盖 53通过一销钉或者钢丝环伸入到环槽中与连接轴 5 1相连， 这样既不影 响连接轴 51 的旋转， 也不影响滑盖 53带动连接轴 51 的移动。
电动螺丝刀在进行操作的时候需要将工作头 9 轴向抵压在螺钉或者工件 上， 这样工作 9头会受到一个反向的轴向力作用， 会产生连接轴 5 1 的后移， 本发明为解决这个问题提出了三种解决方案， 以下分别进行说明。
参照图 10到图 13所示， 连接轴 5 1 的后端临近固定块 50 的地方设有防 止连接轴 51后退的限位机构 8 , 限位机构 8 包括可枢转的限位块 8 1 , 沿限位 块 81枢转方向偏压限位块 81 的扭簧 83。 其中限位块 81 的一端抵住固定块 50 , 另一端通过一销轴 82安装在齿轮箱 22上或者机壳 1上， 销轴 82的轴线 平行于连接轴 51的轴线，限位块 8 1能够围绕销轴 82在一定角度范围内旋转。 扭簧 83的一端固定在限位块 81上， 另一端抵在齿轮箱 22上或者机壳 1上， , t , ,L , , , , ,
扭黄 83的弹力使限位块 81保持在与固定块 50相抵的第一位置 （ 图 11和图 12所示）。 这样的限位机构 8最好设置两个， 沿连接轴 51 的轴线对称分布， 这样可以保持受力平衡， 使连接轴 51 的轴向限位更加可靠。 当需要移动连接 轴 51 时， 通过滑动滑盖 53 即可以解除对连接轴 51移动的限制。 滑盖 53 内 部设有与限位块 81相配的解锁块 532, 解锁块 532上设有斜面 533, 当滑盖 53向后移动时， 斜面 533与限位块 81 的一个侧面 813接触， 并且限位块 81 在斜面 533的带动下克服扭簧 83的弹力作用围绕销轴 82旋转， 直至限位块 81 与固定块 50脱开， 固定块 50被解锁， 从而限位块 81处于允许连接轴 51 轴向运动的第二位置 （ 图 13所示）。 连接轴 51继续轴向移动， 限位块 81被 卡在固定块 50的两端， 此时就可以进行更换工作头。 由此可以看出， 在滑盖 53 带动连接轴 51移动前先滑动距离 S是解除限位块 81对连接轴 51轴向运 动的限制， 故距离 S只要满足滑盖 53的移动能够解除限位块 81对连接轴 51 轴向运动的锁定即可。 工作头更换好后， 滑盖 53前移， 带动连接轴 51和固 定块 50也向前移动， 解锁块 532上的斜面 533与限位块 81 的侧面 813再次 接触并随着滑盖 53的前移而分开，限位块 81在扭簧 83的作用下重新回到与 固定块 50轴向相抵的位置， 这样电动螺丝刀工作的时候， 连接轴 51前端伸 入输出轴 4, 设在连接轴 51后端的固定块 50被限位块 81轴向抵住， 这样连 接轴 51 的轴向运动被限制， 即连接轴 51无法后退， 从而电动螺丝刀的使用 更加可靠。
参照图 14 和图 15 所示， 为限位机构 8 的第二种实施方式， 与上述限位 机构 8不同的是， 销轴 82a的轴线垂直于连接轴 51 的轴线， 限位块 81a的一 端与销轴 82a枢轴连接， 另一端形成为钩状， 勾在固定块 50上， 这样固定块 50也能够被限制向后移动， 从而限位块 81a处于锁定连接轴 51 轴向运动的 第一位置（ 图 14所示；)。 滑盖 53移动使其解锁块 532上的斜面 533与限位块 81a接触， 限位块 81a在斜面 533 的导向下围绕销轴 82a旋转并解除对固定 块 50的锁定， 从而限位块 81a处于允许连接轴 51轴向运动的第二位置 （ 图 15所示）。 本实施方式中限位机构 8a的作用原理与第一实施方式相同， 这里 不再赘述。
参照图 16和图 17所示， 为限位机构 8的第三种实施方式， 限位机构 8b 包括限位块 81b和弹簧 83b, 限位块 81b相对于机壳 1轴向固定， 限位块 81b 能够沿垂直于连接轴 51轴线的方向直线运动，弹簧 83b的一端收容在限位块 , , , , ^ , ^ t
81 b 內 ， 另一端与机壳 1或者齿轮箱 22相连， 弹簧 83b偏压限位块 8 1b使其 保持在轴向与固定块 50相抵的第一位置（ 图 16所示）。 在本实施方式中， 也 是通过设置在滑盖 53 内的斜面 533 与限位块 8 1b相互作用来解除对固定块 50轴向运动的锁定， 限位块 8 1b克服弹簧 83b的弹力直线运动到解除对连接 轴 51锁定的第二位置（ 图 17所示）。 这里的斜面 533的倾斜方向可以根据限 位块 81 b运动的方向来选择，如限位块 8 1b沿垂直于连接轴 51轴线的水平方 向运动， 斜面 533相对于连接轴 5 1轴线的方向和竖直方向形成的平面倾斜； 限位块 81 b沿垂直于连接轴 5 1轴线的竖直方向运动，斜面 533相对于连接轴 轴线的方向和水平方向形成的平面倾斜； 限位块 8 1b 沿与垂直于连接轴 5 1 轴线的水平方向呈角度的方向运动， 这样限位块 81 b具有沿水平和竖直两个 方向上的分量， 故斜面 533的倾斜方向可有多个选择， 本领域技术人员可以 很容易的想到， 这里不再赘述。
以上所述的限位机构 8的三种实施方式， 均是通过滑盖 53移动来解除限 位块 81对连接轴 51轴向运动的锁定， 因为滑盖 53也要带动连接轴 5 1轴向 移动， 这样就需要滑盖 53先移动一段距离， 即先解除限位块 81对连接轴 51 轴向运动的锁定， 才能再带动连接轴 5 1轴向移动， 滑盖 53 内部带动连接轴 51 移动的第一凸块 535 与固定块 50轴向间隔设置， 轴向间隔的距离可通过 斜面 533的倾斜角度及限位块 8 1与固定块 50径向重叠的最大距离来确定。 当然，本领域技术人员也很容易想到无需通过滑盖 53移动的方式也可以实现 解除限位块 81对连接轴 51轴向运动的锁定， 如在机壳 1外设置与限位块 8 1 相连的旋钮， 通过旋转旋钮带动限位块 81克服弹簧力旋转或者移动； 或者在 机壳 1外设置与限位块 8 1相连的拨钮或者按钮，通过推动拨钮或者按压按钮 也能够带动限位块 81克服弹簧力旋转或者移动等等，都可以实现解除限位块 81对连接轴 51轴向运动的锁定。
另外， 可以在滑盖 53和机壳 1 或者齿轮箱 22之间设置弹性元件， 滑盖 53后退到末端位置时可被机壳 1 上的锁扣卡住， 当滑盖 53被释放时可在弹 性力下自动回复至工作状态的位置。
继续参照图 1、 图 2、 图 5和图 6所示， 固定块 50为四方中空的形状， 连接轴 51 具有连接固定块 50 的支撑端 512 , 支撑端 5 12设置成圆柱形， 固 定块 50 的一侧边设置有圆孔或者 U型孔， 支撑端 5 12通过圆孔、 U型孔可 转动的支撑在固定块 50上， 支撑端 512伸入到固定块 50的中空部分上可以 , , A , , 一、 ， , , Α ^ 设置环形凹槽从而能够装配挡圏以对连接轴 51 的轴向移动逬行限位。爻撑端 512的直径最好小于连接轴 5 1六方的外接圆的直径，这样可以减小固定块 50 的体积从而使工具整体的结构更加紧凑。 固定块 50上与圆孔或者 U型孔相 对的另一侧边与支撑端 5 12的端部相抵， 其中支撑端 512的端部设置成圆锥 状， 这样连接轴 51 与固定块 50的接触为点接触， 因为电动螺丝刀在进行操 作的时候需要将工作头 9轴向抵压在工件上， 这样工作头 9会受到一个反向 的轴向力作用， 这个轴向力会传递给连接轴 5 1 , 连接轴 51 与固定块 50之间 就会产生较大的受力摩擦， 点接触的方式可以减小摩擦， 增加连接轴 51 的使 用寿命。 另外， 可以使连接轴 5 1和固定块 50都釆用金属制成， 减小连接轴 51 与固定块 50之间的磨损程度。 而且固定块 50可以由多个四方中空的形状 连接， 以增加强度， 如本实施方式中优选釆用两个或者三个四方中空的形状。 设置固定块 50还可以具有其他的优势， 比如连接轴 5 1可旋转的支撑在固定 块 50上， 无需使用轴承支撑， 减小工具的体积和成本； 固定块 50的侧部面 积大， 方便限位块 8 1与固定块 50相抵以对连接轴 51轴向限位， 也方便滑盖 53通过与固定块 50相抵的方式带动连接轴 5 1移动； 固定块 50的中空部分 也能够起到滑盖 53相对于连接轴 51 的具有空行程（ 即滑盖 53移动而连接轴 51 不随之移动）， 这样滑盖 53上只需设置一个凸块就可以带动连接轴 5 1 前 后移动， 从而方便滑盖 53操作限位块 8 1 以对连接轴 51进行锁定和解锁。
另外， 本领域技术人员很容易能够想到， 如果动力螺丝刀的传动链不包 括连接轴， 也就是输出轴被小齿轮机构直接驱动旋转， 那么工作头和连接轴 之间就会有相对旋转， 必然会产生摩擦， 那么只要在连接轴设置磁铁的工作 端与工作头之间设置成点接触的形式也可以减小摩擦，增长工具的使用寿命。
机壳 1 包括连接在其前端的前壳 13 , 工作头支撑机构的一部分收容在前 壳 13 内， 另一部分被滑盖 53覆盖随着滑盖 53的移动而露出。 本发明优选的 工作头支撑机构为圆筒状的存储夹 52 , 方便旋转， 同时占用空间小， 当然也 可以设置成方形的、 三角形的、 条状的， 支架状的等等。 在电动螺丝刀工作 的时候， 滑盖 53与前壳 13抵接， 这样可以把存储夹 52与连接轴 51都封闭 起来。 齿轮箱盖板 223上对应连接轴 5 1 的位置设有供连接轴 5 1 穿过的孔， 齿轮箱 22上围绕连接轴 51 轴线延伸有拱形件 225 , 拱形件 225 可以与齿轮 箱 22—体设置， 也可分开设置， 通过设置拱形件 225可以将连接轴 51部分 封闭起来， 在电动螺丝刀进行更换工作头的 9时候， 即滑盖 53移动到最后端 L , ,
的位置也不会犯连接轴 5 1裸露出来， 这样可防止灰尘、 粉禾等逬入工具的内 部。 而且， 齿轮箱盖板 223延伸到拱形件 225的端面， 从而沿轴向将传动机 构 3整体封闭在一起。 在工作过程中， 滑盖 53可以将存储夹封闭起来， 从而 防止灰尘进入， 在需要更换工作头时， 移开滑盖 53 即可露出存储夹 52 , 方 便选择不同的工作头， 这样就需要滑盖 53具有一定的长度， 在滑盖 53移动 到与前壳 13抵接的工作位置时， 滑盖 53与存储部 B和传动部 C轴向重叠， 在滑盖 53移动到可更换工作头的位置时， 滑盖 53与马达部 D轴向重叠， 并 与传动部 C部分轴向重叠。 当然， 滑盖 53 移动的方式还有很多， 比如滑盖 53可旋转的安装于机壳 1上， 在覆盖存储夹 52和露出存储夹 52的两个位置 间旋转； 或者类似于移门的方式， 可以打开或者闭合； 或者是枢转的连接于 机壳 1 的方式等等， 都可以实现工作时将存储夹 52封闭， 需要更换工作头时 将存储夹 52露出。
本发明的工作头存储夹 52 大致为圆柱型， 存储夹 52 包括用于收容工作 头的收容仓 521 , 其中收容仓 521设置有六个， 沿着存储夹 52的圆周方向均 匀分布， 工作头收容在收容仓 521 时工作头的纵长方向与工作头存储夹 52 的旋转轴线平行。 当然收容仓也可以是设置 4个、 5 个或者更多， 无论设置 几个收容仓， 存储夹的直径小于齿轮箱 22的最大径向尺寸， 这样的话动力工 具的整体就会比较紧凑。 在实际使用中， 需要的工作头有很多， 如果全部放 在工作头存储夹内， 势必增大工具的体积， 给操作者带来不便， 但是如果一 个一个更换又比较麻烦。 本发明另外提供了可快速方便的更换工作头的实施 方式， 即通过直接更换工作头存储夹的方式来更换工作头， 而且工作头存储 夹可以无需借助工具直接从机壳上移除。
参照图 5和图 1 8所示， 为工作头存储夹可移除的第一种实施方式。 前壳 13的上部设有敞开部 133 ,前壳 13的底部设有与敞开部 133径向相对的径向 开孔 134 , 当需要更换工作头存储夹 52时， 操作滑盖 53 向电机 2的方向移 动， 连接轴 5 1也随着滑盖 53移动到与工作头存储夹 52分开的位置， 这样直 接将手指伸到径向开孔 134内就可以把工作头存储夹 52从敞开部 133顶出而 移除， 再将另外一个安装有不同的工作头的存储夹自敞开部 133装入机壳就 可以使用。 其中存储夹 52通过与前壳 13 圆弧面接触被支撑， 当然， 为了减 小存储夹 52旋转时与前壳 13之间的摩擦，可在前壳 13的内壁上设置沿存储 夹 52轴向延伸的支撑筋 132 , 支撑筋 132可直接成型于前壳， 也可以是可拆 ^ ,. … ，一 ， , , ^ , , 卸的安装于 IT壳上的圆柱长销， ¾样存储夹 52被支撑于支撢筋 132上， 存储 夹 52与前壳 13之间为线接触， 从而减小了存储夹 52旋转时与前壳 13之间 的摩擦。
参照图 1 9 所示， 为工作头存储夹可移除的第二种实施方式。 前壳 1 3 的 底部设有封闭径向开孔 134的橡胶软垫 1 35 , 因为橡胶软垫 135具有一定的 弹性， 既不影响更换工作头存储夹 52时自径向开孔 1 34操作将存储夹 52顶 出， 同时也可以封闭前壳 13 , 防止灰尘等杂物进入机壳内部。 当然， 本领域 技术人员很容易想到在径向开孔 1 34处设置弹片也可以达到相同的效果。 或 者直接在径向开孔 134 内安装按钮， 按钮可以相对于连接轴径向移动， 当需 要顶出存储夹时， 按压按钮， 取出存储夹， 按钮会在自重的作用下落下， 当 然也可以在按钮和前壳之间设置弹簧， 按钮在弹簧的作用下保持与存储夹 52 分离。
参照图 20 所示， 为工作头存储夹可移除的第三种实施方式。 存储夹 52 临近传动机构的端面上设有定位槽 528 , 定位槽 528 的个数以及位置与收容 仓 521 对应， 机壳内设有与定位槽 528 配合的定位件 54 , 这里的定位件 54 可以是弹片、 受弹性力作用的钢球或钢帽等本领域技术人员 习知的结构， 这 样在旋转存储夹 52的时候会听到声音提示同时也能够实现精确定位。定位件 54设置于机壳 1 的底部且与敞开部 133径向相对的位置， 定位槽 528位于工 作头存储夹 52的端面上且与工作头存储夹 52的圆周面连通， 或者说定位槽 528 沿着工作头存储夹 52的径向的一端贯穿工作头存储夹 52的圆周面， 这 样将工作头存储夹 52从机壳内经过敞开部 133取出的时候，沿着工作头存储 夹 52的运动方向不会受到弹性定位件 54的弹性力作用， 将电动螺丝刀倒置 即可轻松的自敞开部 1 33将存储夹 52取出，从而无需再设置径向通孔将存储 夹 52顶出。
参照图 21到图 23 , 在本发明存储夹的优选实施方式中， 存储夹 52具有 主体， 主体可以是圆柱状的或者截面为多边形的并且主体具有旋转轴线 X , 存储夹 52可旋转的支撑在齿轮箱盖板 223和前壳 1 3之间， 主体上设有与旋 转轴线同心的通孔 525 , 从而存储夹 52可通过该通孔 525被旋转的支撑 （如 可在机壳上设置能够伸入通孔 525 内的弹性定位件）。若干个用于收容工作头 的收容仓 521 围绕主体的旋转轴线 X均勾设置， 收容仓 521平行于主体的旋 转轴线 X。优选的收容仓 521设置有六个， 围绕主体的旋转轴线 X均匀分布， , , , , 工作头 9 收容在收容仓 521 时工作头的纵长方向与存储夹 52 的旋转釉线平 行。 当然收容仓也可以是设置 4个、 5 个或者更多， 无论设置几个收容仓， 存储夹的外接圆的直径小于齿轮箱 22的最大径向尺寸， 最好是存储夹 52的 直径小于等于 5厘米， 这样的话动力工具的整体就会小巧和紧凑， 便于随身 携带。 主体的外周壁上设有若干个平行于主体轴向的凸起或者凹槽， 这样在 存储夹 52放置于电动螺丝刀内时， 操作者手动操作旋转存储夹 52能够增大 摩擦， 存储夹 52容易被拨动旋转。
一般情况下， 为了保持工作头 9 , 当工作头 9存放于收容仓 521 内时， 工 作头 9与主体轴向重叠， 这样从主体的外圆周方向上就无法分辨每个收容仓 521 内存放的是何种类型的工作头 9 ,本发明为了解决这个问题提出了如下三 种实施方式。
本发明优选的存储夹的第一种实施方式中， 主体的外周壁至少对应收容 仓 521 的部分设有视窗口 522 , 视窗口 522与收容仓 521径向连通， 这样收 容仓 521 沿存储夹 52轴向的外圆周有一部分是封闭， 一部分是向外敞开的， 方便操作者选择工作头 9时能够从敞开的部分很容易看到工作头 9头部的形 状， 从而快速选择需要的工作头 9。 为了使存储夹 52单独放置的时候能有效 的保持工作头 9 ,视窗口 522沿主体轴向的长度 L小于主体长度的二分之一， 最好是视窗口的长度 L是主体长度的 0.3 0.4倍， 既能够有效的展示工作头 头部的形状， 又能够防止工作头从视窗口处脱落。 另外， 视窗口 522沿主体 周向的宽度 W若过大， 存储夹 52放入机壳时可能工作头从视窗口处滑落， 宽度 W若过小， 则不容易正确的分辨工作头的形状， 优选的视窗口 522的宽 度 W小于收容仓 521 的直径， 最好视窗口 521 的宽度 W在收容仓的直径的 0.7-0.9倍之间。
参照图 24 和图 25 , 本发明优选的存储夹的第二种实施方式中， 收容仓 521 也可以是沿着主体的周向封闭， 主体的外周壁上设置表示不同工作头的 识别装置 523 , 识别装置 523对应于收容仓 521 的位置， 这里的识别装置 523 是对工作头进行标识的总称， 最直观的识别装置 523是在外周壁上设置表示 不同工作头形状的图案， 如常用的十字批头用 "十" 字形状表示， 一字批头 用 "一" 字形状表示， 这样适用于每个操作者。 当然也可以是外周壁上设置 表示不同工作头型号的字母， 如十字批头的型号由 " ΡΗ" 字母表示， 一字批 头的型号由 " SL" 字母表示， 四方批头的型号由 " S Q" 字母表示， 六方批头 . „ „
的型号由 " SW" 芋母表示， 六角星形批头的型号由 " TX" 芋母表示， 十二 角星形批头的型号由 " Ms " 字母表示， 米字形批头的型号由 " Pz" 字母表示 等等， 这样的设置比较适合专业的操作者使用。 另外， 识别装置 523也可以 是文字、 符号、 数字、 形状以及之间的组合等等。
识别装置 523 的设置方式也有很多种， 印刷、 成型、 镶嵌或者粘贴在主 体的外周壁上， 这样在安装工作头时需对应着识别装置来装。 当然本领域技 术人员很容易能够想到， 识别装置 523也可以是可拆卸的安装在主体的外周 壁上， 如果工作头 9的安装与识别装置 523不对应， 那么操作者可自行调整 识别装置 523的安装位置。
参照图 26 和图 27 , 本发明优选的存储夹的第三种实施方式中， 存储夹 52 的主体整体由透明材料制成， 从存储夹 52 的外部可以方便的识别工作头 的形状， 当然， 存储夹 52的主体无需全部由透明材料支撑， 只要对应工作头 9 头部部分的材料是透明的也可以识别工作头， 如主体的外周壁封闭收容仓 521 的部分由透明材料制成， 最好是由透明材料制成的透明部分位于主体轴 向的一端， 为了节省材料， 透明部分沿主体轴向的长度小于主体长度的二分 之一。 另外， 存储夹 52本身可以是如第一种实施方式中外周壁一部分开放式 的， 只需在视窗口 522的外侧套上透明环 524即可。
在实际使用中， 需要的工作头有很多， 如果全部放在工作头存储夹内， 势必增大工具的体积， 给操作者带来不便， 但是如果一个一个更换又比较麻 烦。 本发明提供了单独的存储夹附件， 可通过直接更换存储夹的方式快速方 便的更换工作头， 可以准备多个存储夹， 占用体积小方便携带。
在需要电动螺丝刀工作的时候， 连接轴 5 1 在滑盖 53 的带动下前移， 推 动已选择的工作头进入输出轴 4 , 当需要更换工作头时， 连接轴 51在滑盖 53 的带动下后退， 因为连接轴 51 与工作头接触的一端设有磁铁 5 11 , 所以连接 轴 51会带动工作头回到工作头存储夹的收容仓 521 内。 而如果连接轴 51继 续后移， 会带动工作头从收容仓 521 内出来， 导致无法更换工作头， 如果操 作者没有发现而旋转存储夹时， 很有可能导致工具的损坏。 本发明为解决这 个问题提出了四种解决方案， 以下分别进行说明。
参照图 28到图 30所示， 为限制工作头 9随着连接轴 51后退的第一种实 施方式。 存储夹 52面对齿轮箱 22的一端设有压板 522 , 压板 522能够随着 存储夹 52—起旋转， 压板 522可与存储夹 52—体式设置， 也可分开设置， , „
本买施方式优选为分开设置， 既方便加工， 也容易装配。 压板 522对应收容 仓 521 的位置设有开口 523 , 用于穿过连接轴 51 , 在开口 523面对存储夹的 端面上设置有 U型槽 526 , 用于收容 U型弹簧 56 , U型弹簧 56在自 由状态 时有部分与开口 523是重叠的， U型槽 526 的设计给 U型弹簧 56 的弹性变 形预留有空间。 因为本发明优选的收容仓 521 的数量为 6个，相应的开口 523 数量也为 6个， U型槽 526和 U型弹簧 56的数量同样为 6个， 当然本领域 技术人员很容易想到， 开口 523、 U型槽 526和 U型弹簧 56也可以只设置一 个， 即压板 522相对于齿轮箱 22 固定设置， 这样连接轴 51每次穿过的为同 一个开口 523 , 不会影响旋转存储夹 52 以选择工作头。 当连接轴 51 后退并 在磁铁 511 的作用下带着工作头向后移动时， U型弹簧 56会弹性变形卡在连 接轴 51上，即 U型弹簧 56处于允许连接轴 51运动的第一位置（参照图 29 )。 因为连接轴 51连接工作头的端部和工作头连接连接轴 51 的端部都具有倒角 或者倒圆， 当连接轴 51连接工作头 9的端部离开压板 522的开口 523时， U 型弹簧 56 回复自 由状态， 将开口 522的部分挡住， 工作头 9随着连接轴 51 继续后退时被 U型弹簧 56阻挡， 即 U型弹簧 56处于限制工作头 9后退的第 二位置 （参照图 30 )。 这样连接轴 51 与工作头 9分开， 可以任意的旋转存储 夹以选择需要的另一个工作头 9。 在动力螺丝刀工作的时候， 为了防止 U型 弹簧 56给连接轴 51 的旋转造成阻力， 可在连接轴 51 上轴向对应 U型弹簧 56的位置处设置环绕连接轴 51—周的环形凹槽 512 , 这样 U型弹簧 56不会 对连接轴 51 的旋转造成阻力， 同时 U型弹簧 56实现了将工作头导回到存储 夹 52 内。
参照图 31到图 33所示， 为限制工作头 9随着连接轴 51后退的第二种实 施方式。 齿轮箱盖板 223上固定有一弹片 57 , 弹片 57设置在存储夹 52和齿 轮箱盖板 223之间， 弹片 57上设有至少一个弹性末端 571 , 弹性末端 571部 分伸入齿轮箱盖板 223上的孔内， 这样通过弹性末端 571 的弹性变形， 也能 够实现卡住工作头 9 , 防止连接轴 51后退时带动工作头 9 离开存储夹 52。 参 照图 14 , 弹性末端 571处于允许连接轴 51运动的第一位置； 参照图 15 , 弹 性末端 571处于限制工作头 9后退的第二位置。 根据本实施方式， 本领域技 术人员很容易想到， 可以直接将弹性末端 571卡在齿轮箱盖板 223上， 或者 设置刚性的固定片， 固定片可通过弹性作用在部分遮挡齿轮箱盖板 223上的 孔和离开齿轮箱盖板 223上的孔两个位置间运动， 从而实现工作头 9和连接 , 一 ，
轴 51之间的分离以及将工作头 9导回到存储夹 52。
参照图 34所示， 为限制工作头随着连接轴后退的第三种实施方式。 齿轮 箱盖板 223上对应连接轴 5 1 的位置设有穿孔 223 1 , 齿轮箱盖板 223与存储 夹 52相邻的端面上设有台阶凸起 2232 , 台阶凸起 2232 围绕存储夹 52的旋 转中心且对应收容仓 521设置， 台阶凸起 2232在穿孔 223 1处断开， 并且台 阶凸起 2232上位于穿孔两侧的部分设置导向面 2233 , 导向面 2233沿着工作 头随着存储夹旋转的方向上自穿孔 223 1 处高度递增， 也就是说导向面 2233 自穿孔 223 1 处向两侧高度递增， 这样就形成了两个导向面， 无论存储夹 52 正转或者反转都可以对工作头的位置进行导向。
参照图 35所示， 为限制工作头随着连接轴后退的第四种实施方式。 导向 面 2233 a直接设置于齿轮箱盖板 223的端面上， 导向面 2233 a围绕穿孔 223 1 设置， 自穿孔 2231处向外高度递增， 这样形成一个环形的导向面 2233 a , 既 利于加工又能够保证存储夹正反转时都能够对工作头的位置进行导向。
如上所述的第三、 第四实施方式中分离工作头和连接轴 5 1 以及将工作头 9导回存储夹 52时， 导向面所起的作用相同， 以第三实施方式为例， 导向面 2233具体的作用原理参照图 36到图 38所示， 当需要更换工作头时， 操作滑 盖 53带动连接轴 51移动至连接轴 5 1 沿着轴向与存储夹 52分离 （ 即轴向不 重叠），工作头在连接轴 5 1上磁铁 5 11 的吸力下仍与连接轴 51接合并且有部 分超出存储夹 52的端面， 旋转存储夹 52 , 工作头随着存储夹 52发生位移并 与导向面 2233抵接， 这样继续旋转存储夹 52 , 工作头 9就会在导向面 2233 的作用下滑动到工作头 9的端面与存储夹 52的端面平齐，不会影响到存储夹 52的旋转。
虽然， 若设定好连接轴 51 运动的行程以及存储夹 52和工具内部结构的 尺寸精度、 装配精度， 连接轴 51只能带动工作头 9运动到工作头的端面与存 储夹 52 的端面平齐的位置， 也可以正常的转动存储夹 52 , 但是这样的话对 零部件的加工精度和装配精度有很高的要求， 势必增加电动螺丝刀的成本， 而且随着使用中不断的摩擦， 零部件之间的尺寸产生误差， 仍然会发生工作 头 9卡住存储夹 52或者连接轴 51卡住存储夹 52而导致存储夹 52不能够正 常旋转。 也可以认为受制造精度、 晃动间隙、 材料等综合因素的影响， 工作 头与齿轮箱盖板 223 , 连接轴 5 1 与存储夹 52在旋转过程中可能干涉。 通过 设置导向面可以给连接轴 5 1 的移动留有很大的余地，从而改进配合位处的几 , ^ , , . , . 何结构， 消除存储夹 52旋转过程中各个料件干涉的可能。 这枰就不需要很高 的制造和装配精度， 就可以大大的降低成本， 而且存储夹 52不容易被卡住从 而能够增加工具的使用寿命。
根据工作头 9与导向面 2233之间的运动原理， 导向面 2233可以是斜面、 曲线面、 弧形面等， 本实施方式中优选斜面， 斜面相对于存储夹 52端面的倾 斜角度为 α , 连接轴 51移动的余地大致为斜面长度乘以 sin a , 故角度 a越 大连接轴 5 1 移动的余地就相应的越大， 同时旋转存储夹 52以驱动工作头 9 沿着斜面移动需要的力也就越大， 为了使两者之间比较平衡， 优选斜面的倾 斜角度 a在 10度 -30度之间， 这样旋转存储夹 52 既不需要花费很大力气， 同时保证连接轴 51有足够的移动余地。
一般情况下， 输出轴 4 沿轴向设置内六方孔， 以便带动六方的工作头 9 旋转。 但是如果工作头 9在连接轴 51 的带动下进入输出轴 4时， 如果工作头
9 的六方外型与输出轴 4 内六方孔角度错开， 会给操作者带来很大的不便。 为了防止这种情况的发生， 本发明对输出轴 4的结构进行了改进， 参照图 39 到图 4 0所示， 为输出轴 4 的第一种实施方式， 输出轴 4沿轴向设置通孔 41 , 通孔 41 内设有用于将输出轴 4的扭矩传递给工作头 9的扭矩传递部以及带动 工作头与扭矩传递部相配的校正部，扭矩传递部为设置在通孔 41 内的至少一 个径向凸起 42 , 径向凸起 42能够与六方的工作头 9 的其中一个面抵靠并限 制工作头 9相对于输出轴 4旋转。 校正部为通孔 41 内设置于临近传动机构 3 一端的斜面 421 , 当工作头 9与斜面 421接触时能够在斜面 421 的导向下带 动输出轴 4或者工作头 9旋转以使得通孔 41 与工作头 9相配， 也就是说， 斜 面 421起到了工作头 9进入通孔 41时校正工作头 9相对径向凸起 42的位置， 即工作头 9 和输出轴 4相对旋转， 从而防止工作头 9 的棱角被径向凸起 42 卡住， 以便工作头 9能够顺利进入通孔 41 内。 本发明优选的斜面 421 沿着圆 周方向倾斜， 这样工作头 9和输出轴 4相对旋转的引导方向更加明确。 在本 实施方式中， 径向凸起 42设置 12个， 沿着圆周方向均匀分布， 从而输出轴
4 的正截面形成为每个凸起为 150度的十二角星形， 这里的十二角星形是由 两个六方形圆周方向间隔 30度叠加而成。 当连接轴 5 1推动工作头 9进入输 出轴 4时， 如果工作头 9的六方与输出轴的十二角错开， 那样工作头 9的六 个角会抵在斜面 421上， 工作头 9轴向移动， 在斜面 421 的沿圆周方向倾斜 的导向下， 工作头 9或者输出轴 4旋转直到工作头 9的角与输出轴 4的通孔 , , ,
41相配， 从而工作头 9顺利的进入输出轴 4。 另夕卜， 径向凸超 42和斜面 421 可以连接在一起， 径向凸起 42沿输出轴 4轴向延伸， 这样与工作头 9的接触 面积更大， 传递扭矩的效果更好。 当然， 径向凸起 42和斜面 421也可以分开 设置， 轴向断开或者圆周方向错开的方式等等。
参照图 41 到图 42所示， 为输出轴 4的第二种实施方式， 通孔 4 1 内的径 向凸起 42只设置一个， 为十二角形的其中一个角， 同样的径向凸起 42的一 端设置斜面 421 , 斜面 421 沿着圆周方向倾斜， 同样的， 输出轴 4通过一个 径向凸起 42就能带动工作头 9旋转，而且通过一个斜面 421 的导向也能实现 工作头 9或者输出轴 4的旋转从而使工作头 9顺利进入输出轴 4。 但是， 收 容仓 521 和工作头 9之间总会有间隙存在， 而每次连接轴 51 带动工作头 9 进入输出轴 4前， 工作头 9的轴线和连接轴 51 的轴线会存在偏差， 这样工作 头 9能够在输出轴 4 内径向运动的空间就很小， 为了在工作头 9进入输出轴 4时使工作头 9相对于输出轴 4具有更大的运动空间， 可以在通孔 41 内进一 步设置导向部， 导向部为设置在通孔 41 内临近工作头存储夹 52的一端的内 台阶 43 , 内台阶 43的内径大于通孔 41 的内径， 内台阶 43与通孔 41之间通 过斜面过渡， 内台阶 43沿轴向的高度大致等于斜面 421 沿轴向的高度， 这样 在工作头 9刚进入输出轴 4时， 工作头 9相对于输出轴 4具有更大的旋转或 者轴向运动的空间， 从而进入输出轴 4更加顺利。
参照图 43和图 44所示， 为输出轴 4 的第三种实施方式， 为了防止工作 头 9进入输出轴 4时刚好是工作头 9外围六方的尖正对径向凸起 42的尖部， 可以在输出轴 4通孔 41 内与径向凸起 42在中心相对的位置设置与内台阶 43 相通的沉槽 45 , 中心相对在这里指的是与径向凸起 42 的尖部中心对称的点 位于沉槽 45 的两条侧边 413之间， 沉槽 45 具有与通孔 41 相连的底面 411 及两个侧面 412 , 底面 411 与通孔 41之间倾斜过渡， 容易 工作头 9导向到 通孔 41 内， 两个侧面 412沿着圆周方向倾斜， 这样当工作头 9进入输出轴 4 且工作头 9外围六方的尖正对径向凸起 42的尖部时，工作头 9径向运动至沉 槽 45 , 并在侧面 412的导向下旋转， 同时在底面 411 的导向下进入通孔 41。 这样就可以保证工作头 9处于任何的角度都可以顺利的进入输出轴 4。
以上所述的为输出轴 4的径向凸起 42与工作头 6面接触带动工作头 9旋 转的方式， 这样工作头 9受力均匀， 单位面积受力小。 当然， 输出轴 4的径 向凸起 42与工作头 9线接触也可以带动工作头 9旋转， 如： 不限定径向凸起 ^
42的角度，只要其能带动工作头 9旋转，其一端的斜面 421 沿圓周方向倾斜， 这样也可以实现工作头 9顺利的进入输出轴 4。
上述实施方式涉及对输出轴本身的改进， 在本发明优选的另一种实施方 式中， 可以在输出轴 4上设置弹性抵压装置， 在工作头 9进入输出轴的过程 中通过弹性抵压装置对工作头 9和输出轴的相对位置进行调整从而使工作头 9顺利的进入输出轴。
图 45至图 52为本发明弹性抵压装置第一种实施方式，参照图 45到图 47 , 输出轴 4的收容孔 41沿轴向包括带动工作头旋转的扭矩传递部 461和方便工 作头进入的校正部 462 , 校正部 462为圆孔， 扭矩传递部 461 为六方孔， 这 样可以方便工作头 9进入收容孔 41 , 弹性抵压装置设置在对应校正部 462的 位置， 包括与收容孔 41连通的径向通孔 463、 收容在径向通孔 463 内的 4氐压 件 465 以及套设在输出轴 4上径向偏压抵压件 465的 C型弹片 464 , 抵压件 465在 C型弹片 464的作用下至少部分伸入到收容孔 41 的校正部 462 内，而 且抵压件 465设置于与扭矩传递部 461 的六方孔的其中一个平面的延伸面轴 向对应的位置， 这样在工作头 9进入校正部 462时， 如果工作头 9的六方外 周面中的一个平面与抵压件 465轴向对应， 那么工作头 9可以直接进入扭矩 传递部 461 ; 参照图 48到图 50 , 工作头 9的六方外周面中的一个平面与 4氐压 件 465轴向错开， 那么工作头 9进入校正部 462并径向压迫抵压件 465 , 抵 压件 465压迫 C型弹片 464弹性变形， 同时 4氐压件 465也受到 C型弹片 464 的反向作用力，抵压件 465又在 C型弹片 464的反向作用力下压迫工作头 9 , 使得工作头 9和输出轴 4之间产生相对旋转， 工作头 9的六方外周面中的一 个平面与 4民压件 465轴向对应， 此时工作头 9与扭矩传递部 461相配从而工 作头 9能够顺利进入扭矩传递部 461 , C型弹片 464又回复至初始状态。
图 53和图 57给出了本发明的第二种实施方式， 输出轴 4的校正部 462a 设置成方孔， 扭矩传递部 461 a设置成十二角星形， 本实施方式中的十二角星 形由两个正六方形相位差 30度而形成， 这样， 扭矩传递部 461 a具有十二个 向内凸出的径向凸起 42 , 径向凸起 42能够与六方的工作头 9 的扭矩受力部 抵靠并限制工作头 9相对于输出轴 4旋转。 这样抵压件 465可以设置于与两 个相邻的径向凸起的接合部沿轴向的延伸线对齐的位置， 这样在工作头 9进 入校正部 462a 时， 如果工作头 9 的六方外周面中的一个平面与 4民压件 465 轴向对应， 那么工作头 9可以直接进入扭矩传递部 461 a ; 参照图 56和图 57 , , ,
工作头 9 的六方外周面中的一个平面与抵压件 465轴向错开， 那么工作头 9 在抵压件 465和 C型弹片 464 的作用下相对于输出轴 4旋转到径向凸起 42 与工作头 9的其中一个面贴合就可以进入扭矩传递部 461 a。 根据上述设置， 本领域技术人员很容易想到，至少设置一个径向凸起 42就可以实现输出轴带 动工作头的旋转， 这样的径向凸起 42也可以设置一对， 沿着圆周方向径向相 对， 即对称分布， 从而工作头被输出轴 4带动旋转受力均匀， 当然也可以是 两对或者三对等等， 其中每对的两个都是径向相对， 径向凸起 42能够与六方 的工作头 9的其中一个面抵靠并限制工作头 9相对于输出轴 4旋转。
以上所述的为输出轴 4的径向凸起 42与工作头 6面接触带动工作头 9旋 转的方式， 这样工作头 9受力均匀， 单位面积受力小。 当然， 输出轴 4的径 向凸起 42与工作头 9线接触也可以带动工作头 9旋转， 如： 不限定径向凸起 42 的角度， 只要其能带动工作头 9旋转， 抵压件 465设置于与径向凸起 42 的延伸部轴向对应的位置， 这样也可以实现工作头 9顺利的进入输出轴 4。 这里的抵压件指的是钢球、 钢柱等， 钢球可以设置两个， 只要其中一个与径 向凸起 42轴向对应即可，故对称或者不对称分布都可以实现工作头的顺利进 入输出轴 4。
以上的实施方式中， 扭矩传递部无论是六方形或者十二角星形的， 工作 头 9的六方外型和输出轴 4的扭矩传递部需要完全对应， 如果稍有偏差也会 导致工作头 9 不能够顺利进入输出轴 4。 为了解决这个问题， 图 58 到图 63 给出了本发明的第三种实施方式， 扭矩传递部只取十二个径向凸起中的奇数 个或者偶数个， 这样扭矩传递部具有六个径向凸起， 每两个径向凸起 42之间 通过圆弧过渡， 抵压件 465设置于与其中一个径向凸起沿轴向延伸部分对齐 的位置， 参照图 61 , 当工作头 9的六方外型与扭矩传递部错开， 工作头 9被 抵压件 465 阻挡， 工作头 9继续向前推进， 抵压件 465迫使 C型弹片 464弹 性变形， 同时， C型弹片 464弹性作用于抵压件 465 , 使得工作头 9和输出 轴 4相对旋转， 参照图 62 , 直至这样工作头 9六方外型的一个面与其中一个 径向凸起贴合，参照图 63 ,工作头 9便可以顺利的进入输出轴的扭矩传递部， 实际上， 工作头 9和输出轴 4只需要相对旋转一个很小的角度， 而且设置圆 弧过渡能够给工作头 9和输出轴 4的相对旋转留有足够的空间。 同时， 只要 工作头 9六方外型的棱部是对应着圆弧部分都可以直接进入输出轴的扭矩传 递部， 也就是说圆弧部分对应的角度 K是工作头 9进入输出轴的无干涉角度 , _ , 范围， 本买施方式中 Κ为 30度， 这样六个圆弧就是 180度， 也就是说工作 头进入输出轴的扭矩传递部时有一般的几率是无需校正而直接进入的， 这样 就可以增加弹性抵压装置的使用寿命。
图 64至图 65 为本发明的第四种实施方式， 弹性抵压装置包括设在输出 轴 4上校正部 462的位置与收容孔 41 连通的径向通孔 463a , 具有开口的 环形钢丝 466套设在输出轴 4上径向通孔 463a的位置，环形钢丝 466上设有 凸出部 465 a ,凸出部 465a收容于径向通孔 463a内并且部分伸入到校正部 462 内， 本实施方式中优选径向通孔 463a为腰形孔， 其长度方向沿着输出轴的周 向延伸， 这样可以减小输出轴 4的长度， 从而使结构更加紧凑， 当然也可以 根据需要设置为圆形、 方形等。 在工作头 9进入校正部 462时， 如果工作头 9的六方外周面中的一个面与凸出部 465 a周向对应， 那么工作头 9可以直接 进入扭矩传递部 461 ;而如果工作头 9的六方外周面中的一个面与凸出部 465a 周向错开， 那么工作头 9在环形钢丝 466的作用下相对于输出轴 4旋转使得 工作头 9的六方外型与扭矩传递部 461相配从而工作头 9能够顺利进入输出 轴 4
在上述实施方式中， 优选的设置两个径向通孔 463 a以及对应的两个环形 钢丝 466 , 而且沿着输出轴 4轴向间隔设置， 这样对工作头 9进入输出轴 4 的导正进一步的强化。 另外， 可以将两个径向通孔 463a周向错开， 即两个径 向通孔 463a的相对相位差小于 30度，即两个径向通孔 463a之间间隔的角度 正负 60度即为相对相位差，这样就能够保证即使工作头 9六方外型的其中一 条棱正对其中一个环形钢丝的凸出部， 而另一个环形钢丝的凸出部刚好能够 和工作头六方外型的其他的棱错开， 这样就可以保证工作头 9以任意角度进 入校正部 462时都能够被引导使得工作头 9的外形与扭矩传递部 461 匹配。
图 66所示为本发明的第五种实施方式， 弹性抵压装置包括设在输出轴 4 上校正部 462的位置与收容孔 41连通的径向通孔 463 , 收容在径向通孔 463 内的抵压件 465 以及径向偏压抵压件 465 的弹片 467 , 这里的弹片 467为沿 着输出轴 4轴向延伸的片状弹簧， 弹片 467 的一端固定在输出轴 4和机壳 1 之间， 另一端为抵触抵压件 465的自 由端， 弹片 467的自 由端可以设置为弯 折状， 从而能够增大弹片 467对抵压件 465 的弹力。 本实施方式中工作头 9 进入输出轴 4被导正的原理与第一实施方式中的相同， 这里不再赘述。
图 67所示为本发明的第六种实施方式， 弹性抵压装置包括设在输出轴 4 , , 上校正邵 462的位置与收容孔 41连通的径向通孔 463以及邵分收容在径向通 孔 463且伸入到校正部 462 内的弹片 467a,弹片 467a的一端固定在输出轴 4 和机壳 1之间， 另一端为具有弯折部 468的自 由端， 其中弯折部 468伸入到 校正部 462 内， 这里的弯折部 468相当于抵压件， 即抵压件与弹性件一体设 置也可以实现导正工作头的作用。
图 68 至图 72为本发明的第七种实施方式， 本实施方式中输出轴 4具有 轴向设置的收容孔 41b, 这里的收容孔 41b为圆孔， 输出轴 4上设有与收容 孔 41b连通的第一收容槽 483, 第一收容槽 483 内收容有部分伸入到收容孔 41b 内的第一锁紧件 484, 第一锁紧件 484与收容在收容孔 41b 内的工作头 的沿周向的其中一个面抵靠以限制工作头相对于输出轴 4的旋转。 在工作头 9进入输出轴 4 时， 只要工作头 9 的六方外形的其中一面与第一锁紧件 484 对应， 工作头 9就可以顺利的进入输出轴 4, 从而输出轴 4通过第一锁紧件 484带动工作头旋转。
通过设置第一收容槽 483以及第一锁紧件 484等实现了输出轴 4带动工 作头 9的旋转， 即若输出轴直接通过齿轮驱动旋转， 如此便可以实现工作头 顺利进入输出轴。 为了使连接轴 51 能够带动输出轴 4旋转， 可以在输出轴 4 上设置与第一收容槽 483间隔的设置第二收容槽 487, 第二收容槽 487 内收 容有部分伸入到收容孔 41a 内的第二锁紧件 488, 第二锁紧件 488与伸入到 收容孔 41b 内的连接轴 51 的六方外型的其中一面抵靠以带动输出轴 4旋转。 即只要连接轴 51 的六方外型的其中一面与第一锁紧件 484对应， 连接轴 51 就可以顺利的进入输出轴 4,从而连接轴 51通过第二锁紧件 488带动输出轴 4旋转。
但是， 工作头 9 的六方外形的周面与第一锁紧件 484错开时， 工作头 9 进入输出轴 4就会被第一锁紧件 484阻挡， 这样可以将第一锁紧件 484设置 为能够径向移动， 既允许工作头 9进入输出轴 4, 同时输出轴 4也能够通过 第一锁紧件 484带动工作头 9旋转。具体的可以在输出轴 4和前壳 13之间设 置限位件 48, 输出轴 4能够相对于限位件 48轴向移动， 第一锁紧件 484随 着输出轴 4的轴向运动被限位件 48允许或限制径向运动， 限位件 48上沿着 轴向设置第一卡定部 481和第一释放部 482, 第一锁紧件 484被允许径向运 动时能够与第一释放部 482啮合， 第一锁紧件 484被限制径向运动时与第一 卡定部 481啮合， 另外可以在输出轴 4和限位件 48之间设置弹性元件 489, , ,
输出釉 4釉向运动压缩弹性元件 489 , 当工作头 9进入输出釉 4后， 输出轴 4 能够在弹性力作用下回复至第一锁紧件 484与第一卡定部 48 1啮合的位置， 从而输出轴通过锁紧件带动工作头旋转。
同样的， 为了防止连接轴 5 1进入输出轴 4时被第二锁紧件 488 阻挡， 可 在限位件 48上对应第二锁紧件 488的位置沿轴向设置第二释放部 486和第 二卡定部 485 , 当连接轴 51 六方外型的其中一个面对准第二锁紧件 488时， 不会受到阻挡， 可以顺利插入输出轴 4 , 转动时第二锁紧件 488 可以起到六 方孔的作用卡住连接轴 51 , —起转动。 当连接轴 51 六方外型的棱部对准第 二锁紧件 488时， 受到第二锁紧件 488的阻挡， 连接轴 51会带着第二锁紧件 488和输出轴 4克服弹性力向前运动， 至限位件 48的第二释放部 486处， 第 二锁紧件 488径向运动与第二释放部 486啮合，连接轴 51顺利进入输出轴 4 , 开机后， 连接轴 5 1旋转到其直边与第二锁紧件 488对应时， 在弹性力的作用 下， 输出轴 4带动第二锁紧件 488回复至与第二卡定部 485啮合的位置。
具体的工作过程如下， 当工作头 9 六方外型的直面对准第一锁紧件 484 时， 不会受到阻挡， 可以顺利插入输出轴 4 , 若连接轴 5 1 的六方外型的其中 一面也对准第二锁紧件 488 , 连接轴 51也可以顺利插入输出轴 4 , 转动时连 接轴 5 1 通过第二锁紧件 488 带动输出轴 4转动， 输出轴 4通过第一锁紧件 484带动工作头 9一起转动。 若连接轴 51 的六方外型的其中一面与第二锁紧 件 488错开，连接轴 51会带着第二锁紧件 488和输出轴 4克服弹性力向前运 动， 直至第二锁紧件 488 与限位件 48 的第二卡定部 485 脱开， 第二锁紧件 488径向运动与第二释放部 486啮合，连接轴 5 1顺利进入输出轴 4 , 开机后， 连接轴 5 1被带动旋转， 限位件 48在弹性力作用下抵压第二锁紧件 488 , 第 二锁紧件 488径向运动与第二释放部 486脱开， 输出轴 4在弹性力作用下带 动第二锁紧件 488—起轴向运动， 从而第二锁紧件 488回复至与第二卡定部 485啮合的位置， 连接轴 5 1便可通过第二锁紧件 488带动输出轴 4转动。
当工作头 9 六方外型的直面与第一锁紧件 484错开时， 受到第一锁紧件 484的阻挡， 工作头 9会带着第一锁紧件 484和输出轴 4克服弹性力向前运 动， 直至第一锁紧件 484 与限位件 48 的第一卡定部 48 1 脱开， 第一锁紧件 484径向运动与第一释放部 482啮合， 工作头 9顺利进入输出轴 4 , 此时， 第二锁紧件 488与第二卡定部 485脱开，无论连接轴 5 1 的六方外型的其中一 个直面与第二锁紧件 488是否对齐， 连接轴 51都可以顺利进入输出轴， 开机 , ^ ^ , , , 一、 ， ， ， A ^ 后， 逆接釉 51被带动旋转， 工作头 9在连接轴 5 1磁铁 5 1 1 的作用下也会旋 转一个很小的角度，限位件 48在弹性力作用下抵压第一锁紧件 484和第二锁 紧件 488 , 随着工作头 9和连接轴 51 的旋转， 输出轴 4第一锁紧件 484和第 二锁紧件 488回复至与第一卡定部 481和第二卡定部 485啮合的位置，如此， 连接轴 51便可通过第二锁紧件 488带动输出轴 4转动，输出轴 4也可通过第 一锁紧件 484带动工作头 9一起转动。
以下将对本发明工作头快速更换的过程作详细说明。
参照图 1 所示， 电动螺丝刀处于工作状态， 此时压下按钮开关 7 即可进 行拧螺钉的工作。 当需要更换另外一种类型的工作头 9时， 操作滑盖 53向电 机 2的方向移动， 配合参照图 5 , 图 10和图 11所示， 滑盖 53上的斜面 533 与限位块 81上的一个侧面 813接触， 随着滑盖 53的移动， 限位块 81在斜面 533 的作用下枢轴旋转到图 13 所示的位置， 此时限位块 8 1 解除了对固定块 50轴向运动的锁定， 同时滑盖 53也运动到第一凸块 535与固定块 50接触的 位置； 接下来继续向电机 2的方向移动滑盖 53 , 滑盖 53通过固定块 50带动 连接轴 51随其一起同向移动，连接轴 5 1上的环形凹槽 512越过 U型弹簧 56 , 连接轴 51 上的六方部分与 U型弹簧 56接触并随着连接轴 51 的后移迫使 U 型弹簧 56弹性变形， 直至连接轴 5 1移动到与 U型弹簧 56脱离， U型弹簧 56 回复至自 由状态 （如图 30所示）， 滑盖 53继续带动连接轴 5 1移动至极限 位置， 而工作头 9则无法越过 U型弹簧 56从而留在工作头存储夹 52 内， 此 时，通过设置在工作头存储夹 52上的收容仓 521 的敞开部分找到需要更换的 工作头 9 , 旋转工作头存储夹 52 , 将所需要的工作头 9转到与输出轴 4轴向 相对的位置， 即如图 2所示的位置。
接下来， 继续参照图 5 , 向输出轴 4 的方向移动滑盖 53 复位， 滑盖 53 通过第二凸块 536抵在固定块 50上带动连接轴 5 1 向输出轴 4的方向移动， 连接轴 51设有磁铁 51 1的一端与已选择的工作头 9尾部接触并吸附该工作头 9 , 滑盖 53带动连接轴 5 1 向输出轴 4的方向移动， 配合参照图 41或图 45 , 在工作头 9进入输出轴 4时， 在斜面 421 的导向下或者在弹性抵压装置的作 用下， 工作头 9顺利进入输出轴 4 , 而连接轴 5 1 随着滑盖 53继续移动， 直 至工作头 9从输出轴 4的前端露出， 滑盖 53回复到与前壳 13抵接的位置， 此时， 滑盖 53上的斜面 533与限位块 81脱离， 限位块 8 1在弹性作用下又回 到与固定块 50轴向相抵的位置，这样电动螺丝刀又回到了图 1所示的工作状 , , „ , ,
态。 整个工作头更换的过程操作简单， 快速， 对于使用者禾说， 能大大的提 高工作效率。
上述对各元件的定义并不仅限于实施方式中提到的各种具体结构或形 状， 本领域的普通技术人员可对其进行简单地熟知地替换。 如马达可以用汽 油机或柴油机等来替代电机； 工作头可以是截面为任意的规则的多边形； 此 外， 上述实施方式中， 连接轴与工作头存储夹之间的相对轴向移动也可以是 连接轴固定， 而工作头存储夹既能够轴向运动也可以旋转， 而连接轴也可以 是和电机轴同轴设置等等。 另外， 限位机构主要用于限制连接轴轴向运动， 对其结构并无特别要求， 可视不同机壳的内部格局来相应改变构形， 可以增 加新的元件， 也可以减少不必要的元件。

Claims

权 利 要 求 书
1. 一种动力工具， 包括：
机壳；
马达， 设置在机壳内， 并输出旋转动力；
连接轴， 与若干个工作头之一配接并用于驱动所述若干个工作头之一旋转； 传动机构， 设置在马达和连接轴之间并可将马达输出的旋转动力传递给连 接轴；
存储夹， 设置于机壳内， 所述存储夹包括用于收容若干个并列设置的工作 头的收容仓， 所述连接轴能够在穿过收容仓与若干个工作头之一配接的工作位 置以及与所述若干个工作头之一分开的释放位置之间轴向运动；
其特征在于： 所述动力工具还包括设置在机壳和连接轴之间的限位机构， 所述限位机构包括可操作地在两个位置间运动的限位块， 在第一位置， 所述连 接轴处于工作位置， 所述限位块限制连接轴向远离工作头的方向运动， 在第二 位置， 所述连接轴处于释放位置， 所述限位块允许连接轴向远离工作头的方向 运动。
2.如权利要求 1 所述的动力工具， 其特征在于： 所述动力工具还包括设置 于机壳上能够沿连接轴轴向移动的操作件，所述操作件带动所述连接轴轴向运 动。
3.如权利要求 2 所述的动力工具， 其特征在于： 所述操作件上设有与限位 块相抵的解锁部， 所述操作件通过所述解锁部带动限位块在第一位置和第二位 置之间运动， 并且在所述第二位置， 所述操作件能够带动所述连接轴轴向运动。
4.如权利要求 3 所述的动力工具， 其特征在于： 所述存储夹的一部分收容 在所述机壳内， 另一部分被所述操作件覆盖并且随着操作件移动而露出。
5.如权利要求 4 所述的动力工具， 其特征在于： 所述操作件和机壳二者之 一上沿连接轴轴向设有导向槽， 所述操作件和机壳二者之另外一个上设有与导 向槽相配的导轨， 所述操作件通过所述导轨在导向槽内滑动而相对于机壳沿连 接轴轴向运动。
6.如权利要求 4 所述的动力工具， 其特征在于： 所述操作件内部沿所述连 接轴轴向间隔的设有第一凸块和第二凸块， 所述连接轴远离所述存储夹的一端 设有固定块， 所述固定块相对于连接轴轴向固定并且位于所述第一凸块和第二 WO 2013/020485 , , , A , ^ , , , PCT/CN2012/079689 凸块之间， 所迷固定块能够在第一凸块和第二凸块之间轴向运动。
7.如权利要求 4 所述的动力工具， 其特征在于： 所述机壳沿连接轴轴向可 分为设有马达的马达部， 设有传动机构的传动部， 设有存储夹的存储部， 所述 连接轴处于工作位置时， 所述操作件轴向与所述传动部和存储部重叠； 所述连 接轴处于释放位置时， 所述操作件轴向与所述马达部重叠， 与所述传动部部分 重叠。
8.如权利要求 1 所述的动力工具， 其特征在于： 所述限位块围绕平行于连 接轴轴向的枢轴旋转。
9.如权利要求 1 所述的动力工具， 其特征在于： 所述限位块围绕垂直于连 接轴轴向的枢轴旋转。
10.如权利要求 1所述的动力工具， 其特征在于： 所述限位块沿着垂直于连 接轴轴向的方向直线运动。
11.如权利要求 1所述的动力工具， 其特征在于： 所述动力工具还包括用于 连接工作头的输出轴， 所述连接轴的一端与所述传动机构可传递扭矩的连接， 所述连接轴的另一端能够与所述输出轴连接并通过输出轴驱动工作头旋转。
12.如权利要求 1所述的动力工具， 其特征在于： 所述限位机构还包括向第 一位置抵压限位块的弹性元件。
13.如权利要求 1所述的动力工具， 其特征在于： 所述机壳内设有齿轮箱， 所述传动机构收容在所述齿轮箱内，所述齿轮箱和存储夹之间设有齿轮箱盖板。
14.如权利要求 13 所述的动力工具， 其特征在于： 所述存储夹可旋转的支 撑在机壳和所述齿轮箱盖板之间。
15.如权利要求 13 所述的动力工具， 其特征在于： 所述传动机构包括与马 达相连的行星齿轮减速机构以及与所述连接轴相连的小齿轮机构， 所述齿轮箱 内设有位于所述行星齿轮减速机构与所述小齿轮机构之间的隔板。
16.如权利要求 15 所述的动力工具， 其特征在于： 所述小齿轮机构包括与 所述行星齿轮减速机构连接的第一齿轮、 与所述连接轴连接的第三齿轮以及同 时与第一齿轮和第三齿轮啮合的第二齿轮。
17.—种动力工具的操作方法， 所述动力工具如权利要求 1所述， 所述操作 方法包括以下步骤： 1 )操作限位块处于第二位置， 解除限位块对连接轴轴向运 动的限制； 2 ) 移动连接轴处于释放位置； 3 )操作存储夹， 选择需要的工作头； 4 ) 移动连接轴回复至工作位置。 WO 2013/020485 , , «_ , , PCT/CN2012/079689
18.如杈利要求 17 所述的操作方法， 其特征在于： 所述动力工具还包括设 置于机壳上能够沿连接轴轴向移动的操作件，所述操作件带动所述连接轴轴向 运动， 所述操作件上设有与限位块相抵的解锁块， 所述操作件通过所述解锁块 带动限位块在第一位置和第二位置之间运动， 所述操作方法还包括： 通过轴向 移动操作件使限位块处于第二位置后， 继续移动操作件并带动连接轴处于释放 位置。
19.如权利要求 18 所述的操作方法， 其特征在于： 所述操作方法还包括： 移动操作件带动连接轴处于释放位置后， 所述存储夹的一部分随着操作件移动 而露出。
20.如权利要求 19 所述的操作方法， 其特征在于： 所述限位机构还包括向 第一位置抵压限位块的弹性元件， 所述操作方法还包括： 所述连接轴回复至工 作位置后， 所述限位块受弹性抵压回复至第一位置。
21. 一种动力工具， 包括：
机壳；
马达， 设置在机壳内， 并输出旋转动力；
输出轴， 具有轴向设置的容纳工作头的收容孔；
传动机构， 设置在马达和输出轴之间并可将马达输出的旋转动力传递给输 出轴；
存储夹， 设置于机壳内， 所述存储夹包括用于收容若干个并列设置的工作 头的收容仓；
连接轴， 所述连接轴能够在穿过收容仓与若干个工作头之一配接并使若干 个工作头之一位于收容孔内的工作位置以及与所述若干个工作头之一分开的释 放位置之间轴向运动；
其特征在于： 所述动力工具还包括设置在机壳和连接轴之间的限位机构， 所述限位机构包括可操作地在两个位置间运动的限位块， 在第一位置， 所述连 接轴处于工作位置， 所述限位块限制连接轴向远离工作头的方向运动， 在第二 位置， 所述连接轴处于释放位置， 所述限位块允许连接轴向远离工作头的方向 运动。
22.如权利要求 21 所述的动力工具， 其特征在于： 所述动力工具还包括设 置于机壳上能够沿连接轴轴向移动的操作件， 所述操作件带动所述连接轴轴向 运动。 WO 2013/020485 , «_ , , PCT/CN2012/079689
23.如杈利要求 22 所述的动力工具， 其特征在于： 所述搮作仵上设有与限 位块相抵的解锁部， 所述操作件通过所述解锁部带动限位块在第一位置和第二 位置之间运动， 并且在所述第二位置， 所述操作件能够带动所述连接轴轴向运 动。
24.如权利要求 23 所述的动力工具， 其特征在于： 所述存储夹的一部分收 容在所述机壳内， 另一部分被所述操作件覆盖并且随着操作件移动而露出。
25.如权利要求 22 所述的动力工具， 其特征在于： 所述操作件内部沿所述 连接轴轴向间隔的设有第一凸块和第二凸块， 所述连接轴远离所述存储夹的一 端设有固定块， 所述固定块相对于连接轴轴向固定并且位于所述第一凸块和第 二凸块之间， 所述固定块能够在第一凸块和第二凸块之间轴向运动。
26.如权利要求 21 所述的动力工具， 其特征在于： 所述限位块围绕平行或 者垂直于连接轴轴向的枢轴旋转。
27.如权利要求 21 所述的动力工具， 其特征在于： 所述限位块沿着垂直于 连接轴轴向的方向直线运动。
28.如权利要求 21 所述的动力工具， 其特征在于： 所述连接轴的一端与所 述传动机构可传递扭矩的连接， 所述连接轴的另一端能够与所述输出轴连接并 通过输出轴驱动工作头旋转。
29.如权利要求 21 所述的动力工具， 其特征在于： 所述限位机构还包括向 第一位置抵压限位块的弹性元件。
30.—种动力工具的操作方法， 所述动力工具如权利要求 21 所述， 所述操 作方法包括以下步骤： 1 )操作限位块处于第二位置， 解除限位块对连接轴轴向 运动的限制； 2 ) 移动连接轴处于释放位置； 3 ) 操作存储夹， 选择需要的工作 头； 4 ) 移动连接轴回复至工作位置。
31.如权利要求 30 所述的操作方法， 其特征在于： 所述动力工具还包括设 置于机壳上能够沿连接轴轴向移动的操作件，所述操作件带动所述连接轴轴向 运动， 所述操作件上设有与限位块相抵的解锁块， 所述操作件通过所述解锁块 带动限位块在第一位置和第二位置之间运动， 所述操作方法还包括： 通过轴向 移动操作件使限位块处于第二位置后， 继续移动操作件并带动连接轴处于释放 位置。
32.如权利要求 30 所述的操作方法， 其特征在于： 所述操作存储夹的方式 为旋转存储夹。
PCT/CN2012/079689 2011-08-06 2012-08-03 动力工具及用于该动力工具的操作方法 WO2013020485A1 (zh)

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