WO2024001949A1 - 动力工具 - Google Patents

动力工具 Download PDF

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Publication number
WO2024001949A1
WO2024001949A1 PCT/CN2023/102094 CN2023102094W WO2024001949A1 WO 2024001949 A1 WO2024001949 A1 WO 2024001949A1 CN 2023102094 W CN2023102094 W CN 2023102094W WO 2024001949 A1 WO2024001949 A1 WO 2024001949A1
Authority
WO
WIPO (PCT)
Prior art keywords
output shaft
shaft
locking
power tool
lock frame
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2023/102094
Other languages
English (en)
French (fr)
Inventor
裴晴晴
童树彬
程永辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Chervon Industry Co Ltd
Original Assignee
Nanjing Chervon Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Chervon Industry Co Ltd filed Critical Nanjing Chervon Industry Co Ltd
Priority to EP23830127.9A priority Critical patent/EP4516454B1/en
Publication of WO2024001949A1 publication Critical patent/WO2024001949A1/zh
Priority to US18/968,632 priority patent/US12544900B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/008—Gear boxes, clutches, bearings, feeding mechanisms or like equipment

Definitions

  • the present application relates to an electric power tool, for example, a power tool that outputs torque through rotation.
  • Power tools on the market such as electric drills, screwdrivers, etc., as representative torque output tools, are very commonly used power tools.
  • the torque output by the motor shaft is transmitted to the output mechanism through the transmission mechanism, and finally acts on the operating object.
  • the output shaft is driven by the motor output shaft to rotate in the forward direction.
  • the torque received by the output shaft is transmitted to the transmission.
  • the mechanism and the motor shaft are reversely driven. Reverse transmission often causes damage to components in the transmission mechanism such as gears, affecting the service life.
  • this type of Power tools often have shaft locks.
  • An object of the present application is to solve or at least alleviate some or all of the above problems. To this end, this application provides a power tool that can solve the technical problem of shaft lock component collision.
  • a power tool including: a housing; a motor accommodated in the housing; the motor includes a drive shaft that rotates about a first axis; an output shaft for outputting torque; and the output shaft rotates about a second axis. for shaft rotation; a locking mechanism used to lock the output shaft when the output shaft is stressed and transmits torque to the drive shaft.
  • the locking mechanism includes: a shaft lock frame, which is connected with the output shaft to drive the output shaft; the damping component includes a first installation part connected to the output shaft, a second installation part connected to the shaft lock frame, and a first installation part connected to the third installation part.
  • the buffer part of the second mounting part when the output shaft and the shaft lock frame move relative to each other, the buffer part undergoes torsional deformation to provide a buffering force that delays the movement of the output shaft relative to the shaft lock frame.
  • the output shaft has a first outer peripheral surface; the shaft lock bracket includes a first inner surface circumferentially surrounding the first outer peripheral surface.
  • a first gap is provided between the first inner surface and the first outer peripheral surface.
  • the damping component is positioned outside the first gap.
  • the buffer extends at least partially along the direction of the second axis.
  • the first mounting part, the second mounting part and the buffering part are an integral component.
  • the locking mechanism further includes: a shaft locking ring, arranged around the output shaft; and a locking piece, arranged between the shaft locking ring and the output shaft, the locking piece having at least a locked position and an unlocking position relative to the shaft locking ring. .
  • the shaft locking ring is disposed within the housing, and the shaft locking ring and the housing cannot rotate relative to each other.
  • the locking member when the output shaft transmits torque to the drive shaft, the locking member is in the locking position, and the locking member locks the rotation of the output shaft relative to the housing.
  • the locking piece When the drive shaft transmits torque to the output shaft, the locking piece is in the unlocking position, and the locking piece releases the rotation of the output shaft relative to the housing.
  • the shaft lock frame is also connected to or formed with a switching dial inserted between the shaft lock ring and the locking piece.
  • the switching dial is used to dial the locking piece to switch between the locking position and the unlocking position.
  • the shaft lock bracket rotates relative to the output shaft within a preset angle range.
  • the first mounting portion rotates synchronously with the output shaft.
  • the second mounting portion and the shaft lock frame rotate synchronously.
  • the buffer portion includes a first buffer portion extending along the second axis and connected to the first mounting portion and a second buffer portion extending in a direction perpendicular to the second axis and connected to the second mounting portion.
  • the first buffer part and the second buffer part are fixedly connected or integrally formed.
  • the first mounting part and the second mounting part are arranged back and forth along the second axis direction.
  • a battery pack is also included to power the motor.
  • An embodiment also provides a power tool, including: a housing; a motor accommodated in the housing; the motor includes a drive shaft rotating about a first axis; an output shaft for outputting torque; and the output shaft rotates about a second axis.
  • the axis is for shaft rotation; the output shaft has a first outer peripheral surface; a locking mechanism is used to lock the output shaft when the output shaft is stressed and transmits torque to the drive shaft; the locking mechanism connects the motor and the output shaft; the locking mechanism includes:
  • the shaft lock frame includes a first inner surface surrounding at least part of the first outer peripheral surface; a first gap is provided between the first inner surface and the first outer peripheral surface; a damping component is provided outside the first gap.
  • An embodiment further provides a power tool, including: a housing; a motor accommodated in the housing; the motor includes a drive shaft that rotates about a first axis; an output shaft for outputting torque; and the output shaft rotates with a second axis.
  • the axis is the shaft rotation; the output shaft has a first outer peripheral surface; a locking mechanism is used to receive force on the output shaft and move toward the The output shaft is locked when the drive shaft transmits torque; the locking mechanism connects the motor and the output shaft; the locking mechanism includes: a shaft lock frame, including a first inner surface that at least surrounds part of the first outer peripheral surface; the first inner surface and A first gap is provided between the first outer peripheral surfaces; a damping component is provided outside the first gap.
  • the damping component includes an elastic element. When the output shaft and the shaft lock bracket move relative to each other, the elastic element is torsionally deformed to provide delay. The buffering force of the output shaft relative to the movement of the shaft lock frame.
  • the damping assembly includes a first mounting portion connected to the output shaft, a second mounting portion connected to the shaft lock frame, and a buffer portion connecting the first mounting portion and the second mounting portion.
  • the elastic element is provided on the buffer part.
  • the locking mechanism further includes a shaft locking ring disposed around the output shaft; and a locking member disposed between the shaft locking ring and the output shaft, the locking member having at least a locking position and an unlocking position relative to the shaft locking ring.
  • the shaft lock bracket rotates relative to the output shaft within a preset angle range.
  • Figure 1 is a structural diagram of the first embodiment of the present application.
  • Figure 2 is a partial view of the internal structure diagram and a half-section view of Figure 1;
  • Figure 3 is a structural diagram of the locking mechanism in Figure 1;
  • Figure 4 is a schematic diagram of an exploded view of the locking mechanism in Figure 1;
  • Figure 5 is a structural schematic diagram of the locking mechanism in Figure 4 from another perspective
  • Figure 6 is a left side structural schematic diagram of the locking mechanism in Figure 5;
  • Figure 7 is a cross-sectional view along A-A in Figure 4.
  • Figure 8 is a cross-sectional view of B-B in Figure 4, in which the locking member is in the unlocking position;
  • Figure 9 is a cross-sectional view of C-C in Figure 4, in which the locking member is in the unlocking position;
  • Figure 10 is a cross-sectional view of B-B in Figure 4, in which the motor rotates clockwise and the locking member is in the locking position;
  • Figure 11 is a cross-sectional view of C-C in Figure 4, in which the motor rotates clockwise and the locking member is in the locking position;
  • Figure 12 is a cross-sectional view of B-B in Figure 4, in which the motor rotates counterclockwise and the locking member is in the locking position;
  • Figure 13 is a cross-sectional view of C-C in Figure 4, in which the motor rotates counterclockwise and the locking member is in the locking position;
  • Figure 14 is a schematic structural diagram of the damping assembly in Figure 4.
  • Figure 15 is a structural diagram of the locking mechanism of the second embodiment of the present application.
  • Figure 16 is a schematic structural diagram of the damping assembly in Figure 15.
  • the term "and/or” is an association relationship describing associated objects, indicating that three relationships can exist.
  • a and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.
  • the character "/" in this application generally indicates that the related objects are an "and/or" relationship.
  • connection may mean direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation.
  • direct connection means that two parts or components are connected together without the need for middleware
  • indirect connection means that two parts or components are connected to at least one middleware respectively. These two parts Or components are connected through middleware.
  • “connected” and “coupled” are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.
  • “basically” when expressing relative angular position relationships can refer to adding or subtracting a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle. More).
  • a function performed by a component may be performed by one component, multiple components, one part, or multiple parts.
  • the function performed by the part It can also be performed by one part, one component, or a combination of multiple parts.
  • positional words such as upper side, lower side, left side, right side, front side, and back side not only represent the front direction, but can also be understood as the side direction.
  • the lower part may include the right lower part, the lower left part, the lower right part, the lower part of the front part, the lower part of the back part, etc.
  • FIG. 1 shows a power tool according to an embodiment of the present application.
  • the power tool is an electric drill 100.
  • the power tool can also be other power tools that output torque through rotation, such as an electric screwdriver, or a tool that has the functions of a screwdriver and an electric drill, and can also apply rotational torque to it. Transformed into other forms of motion tools, such as grinding tools, such as angle grinders, sanders, etc.
  • FIG. 1 to 3 illustrate an electric drill 100 according to an embodiment of the present application, including a power supply device 30.
  • the power supply device 30 is used to provide electric energy to the electric drill 100 .
  • the power supply device 30 is a battery pack, and the battery pack cooperates with a corresponding power circuit to power the electric drill 100 .
  • the power supply device 30 is not limited to the scenario of using a battery pack, but can also supply power to corresponding components in the machine through commercial power, AC power, and corresponding rectification, filtering, and voltage regulation circuits.
  • the electric drill 100 includes a housing 11, a motor 12, a transmission mechanism 19 and an output mechanism 13.
  • the housing 11 includes a motor housing 111 for accommodating a motor.
  • the motor 12 includes a drive shaft (not shown in the figure) rotating about the first axis 101 .
  • the motor 12 is specifically configured as a motor.
  • the motor 12 will be used instead of the motor, and the motor shaft will be used instead of the drive shaft.
  • this does not limit this application.
  • the housing 11 is also formed with or connected to a holding portion 113 for user operation.
  • the holding portion 113 and the motor housing 111 form a T-shaped or L-shaped structure, which is convenient for the user to hold and operate.
  • the power supply device 30 is connected to one end of the holding portion 113 .
  • the power supply device 30 is detachably connected to the grip 113 .
  • the electric drill 100 also includes a switch 122 installed on the handle 113 .
  • the switch 122 can be triggered relatively conveniently, and the switch 122 can be set as the main switch 122 for starting the electric drill 100.
  • the output mechanism 13 is used to receive the torque provided by the motor 12 and output the torque.
  • the output mechanism 13 includes
  • the output shaft 14 is connected to the working attachment and drives the rotation of the working attachment.
  • the front end of the output shaft 14 is provided with a clamping component 132 or a receiving portion, which can clamp corresponding working accessories, such as screwdrivers, drill bits, sleeves, etc., when implementing different functions.
  • the output shaft 14 is used to output power, and the output shaft 14 rotates around the output axis.
  • the output axis is the second axis 102 .
  • the first axis 101 and the second axis 102 coincide.
  • the second axis 102 and the first axis 101 are arranged at a certain angle.
  • the first axis 101 and the second axis 102 are arranged parallel to but not coincident with each other.
  • the transmission mechanism 19 is provided between the motor 12 and the output mechanism 13 for transmitting power between the motor 12 and the output mechanism 13 .
  • the transmission mechanism 19 includes: a planetary gear train for deceleration, and the number of the planetary gear trains may be one level or multiple levels.
  • the planetary gear train converts the output speed of the motor 12 according to a certain transmission ratio to achieve appropriate torque.
  • the transmission mechanism 19 also includes a shifting component to achieve multi-speed output through multiple sets of gears with different transmission ratios.
  • the electric drill 100 also includes a locking mechanism 15 to realize the shaft locking function of one-way transmission.
  • the locking mechanism 15 is used to lock the rotation of the output shaft 14 when the output shaft 14 reversely transmits torque to the motor shaft (not shown in the figure).
  • the locking mechanism 15 connects the transmission mechanism 19 and the output mechanism 13 .
  • the transmission mechanism 19 may not be provided.
  • the motor shaft (not shown in the figure) directly drives the output mechanism 13 .
  • the locking mechanism 15 connects the motor 12 and the output mechanism 13 .
  • the power tool may be an impact-type rotary power tool.
  • an impact mechanism for providing impact force is provided between the transmission mechanism and the locking mechanism 15 .
  • the impact mechanism is used to provide impact force to the output shaft.
  • the locking mechanism 15 includes a shaft lock frame 16 , a damping assembly 17 , a shaft lock ring 151 and a locking piece 154 .
  • the shaft lock frame 16 serves as the torque input component of the locking mechanism 15, and the shaft lock frame 16 connects the transmission mechanism 19 and the output mechanism 13.
  • the shaft lock bracket 16 connects the planetary gear set 191 closest to the output mechanism 13 and the output shaft 14 .
  • the output shaft 14 is rotatably connected to the shaft lock bracket 16 .
  • other components may be connected to the output shaft 14 to form an output part and then connected to the shaft lock bracket 16 .
  • the output part and the output shaft 14 are configured to rotate synchronously, the output part being connected to the shaft lock bracket 16 or the output shaft 14 being directly connected to the shaft lock bracket 16 is not a limitation of this application. It can also be understood that the shaft lock frame 16 can be connected to other components to form an input assembly. As long as the input assembly rotates synchronously with the shaft lock frame 16, it is not a limitation of the present application.
  • the output shaft 14 has a first outer peripheral surface 142 .
  • the shaft lock frame 16 includes at least surrounding part of the first outer peripheral surface 142 outer first inner surface 1621 .
  • a first gap 1622 is provided between the first inner surface 1621 and the first outer peripheral surface 142 .
  • the damping assembly 17 includes: a first mounting part 171 , a second mounting part 172 and a buffering part 173 .
  • the first mounting part 171 is connected to the output shaft 14
  • the second mounting part 172 is connected to the shaft lock frame 16
  • the buffer part 173 is connected to the first mounting part 171 and the second mounting part 172 .
  • the damping component 17 is disposed outside the first gap 1622 , that is to say, the damping component 17 will not be inserted or embedded in the first gap 1622 .
  • At least part of the buffer portion 173 extends along the second axis 102 direction.
  • a shaft locking ring 151 is provided around the output shaft 14 .
  • the locking piece 154 is disposed between the shaft locking ring 151 and the output shaft 14 , and the locking piece 154 has at least a locking position and an unlocking position relative to the shaft locking ring 151 .
  • the output shaft 14 transmits torque to the motor shaft (not shown in the figure) in the reverse direction
  • the locking piece 154 is in the locking position
  • the locking piece 154 locks the rotation of the output shaft 14 relative to the housing 11 .
  • the motor shaft (not shown in the figure) transmits torque to the output shaft 14 and the locking piece 154 is in the unlocked position
  • the locking piece 154 releases the rotation of the output shaft 14 .
  • the shaft lock frame 16 also includes or is formed with a switching dial 164 inserted between the shaft lock ring 151 and the locking piece 154.
  • the switching dial 164 dials the locking piece 154 to switch between the locking position and the unlocking position.
  • the buffer portion 173 of the damping assembly 17 extends along the axial direction.
  • the output shaft 14 drives the buffer portion 173 to undergo torsional deformation, and the buffer portion 173 simultaneously moves toward the output shaft 14
  • this rebound force buffers the movement of the output shaft 14 relative to the shaft lock frame 16 , that is, the rebound force acts as a buffer force and delays the movement of the output shaft 14 relative to the shaft lock frame 16 .
  • the impact force of the output shaft 14 hitting the locking mechanism 15 will also be reduced to a certain extent, which can improve the impact problem due to inertia during braking, and in particular, can effectively improve the impact noise problem.
  • the damping structure is arranged in the first gap 1622 or the damping mechanism undergoes linear reciprocating deformation perpendicular to the second axis 102.
  • the damping component 17 of this embodiment is arranged outside the first gap 1622, which does not affect the function of the first gap 1622 and does not increase the difficulty of its design and assembly.
  • the output shaft 14 and the shaft lock frame 16 basically move synchronously, thereby not increasing the damping and not affecting the overall machine efficiency.
  • the output shaft 14 is formed or connected with a transmission part 141, and the transmission part 141 is specifically an external hexagonal part.
  • the first outer peripheral surface 142 is the outer surface of the outer hexagonal portion.
  • the shaft lock ring 151 is fixedly installed in the housing 11 , which means that the shaft lock ring 151 and the housing 11 cannot rotate relative to each other.
  • the shaft lock ring 151 is arranged around the output shaft 14 .
  • a first accommodation space 152 is formed between the shaft lock ring 151 and the output shaft 14 .
  • the locking member 154 is located in the first space formed between the shaft lock ring 151 and the output shaft 14 . 152 accommodation spaces.
  • the shaft lock frame 16 includes a main body 161 , a planet gear carrier 163 connected to the planet gear set 191 , and the above-mentioned switching dial 164 .
  • the switching block 164 and the planet carrier 163 are respectively provided on both sides of the main body 161 .
  • the main body 161 generally has a disc-shaped structure.
  • the main body portion 161 is also formed with a driving hole 162 .
  • the transmission part 141 of the output shaft 14 extends into the driving hole 162 .
  • the transmission part 141 of the output shaft 14 has an external hexagonal structure, and the corresponding drive hole 162 is used to allow the transmission part 141 to be in the drive hole 162 and relative to the shaft lock frame 16 within a preset angle range.
  • Rotating octagonal hole of course, the specific structure of the driving hole 162 is not limited to this. As long as the structure of the driving hole 162 can allow the transmission part 141 to rotate relative to the shaft lock frame 16 in the driving hole 162 within a preset angle range, it falls within the scope of protection of the present invention.
  • the transmission part 141 of the output shaft 14 is not limited to the outer hexagonal structure.
  • the transmission part 141 of the output shaft 14 can also be of other transmission structures.
  • the structure of the driving hole 162 should only allow the transmission part 141 to be in The driving hole 162 can be rotated relative to the shaft lock frame 16 within a preset angle range.
  • the shaft locking ring 151 is formed with a cylindrical surface 153 with the second axis 102 as the center line, and the cylindrical surface 153 forms the above-mentioned first accommodation space 152 around the output shaft 14 .
  • the outer periphery of the output shaft 14 that is, the first outer peripheral surface 142 includes: a first flat surface 1421 and a second flat surface 1422 .
  • the first plane 1421 is parallel to the first axis 101
  • the second plane 1422 is also parallel to the first axis 101 .
  • the locking member 154 is a cylindrical pin, and the cylindrical pin is disposed between the first plane 1421 and the cylindrical surface 153 .
  • the number of first planes 1421 is three.
  • the number of cylindrical pins is also 3.
  • the number of switching blocks 164 is also three, and the three switching blocks 164 are respectively located between two adjacent cylindrical pins to push the cylindrical pins to move in the circumferential direction around the second axis 102 .
  • the locking piece 154 When the locking piece 154 is in the locking position as shown in Figures 11 and 13 due to the reverse transmission of the output shaft 14 or other driving force, the locking piece 154 is in contact with the cylindrical surface 153 and the first flat surface 1421 at the same time. The position of the locking member 154 in the circumferential direction around the first axis 101 is limited. At this time, the rotation of the output shaft 14 relative to the housing 11 is locked. That is to say, the rotation of the output shaft 14 relative to the shaft lock ring 151 is locked. Therefore, the user cannot rotate the output shaft 14 relative to the housing 11 from the side where the output mechanism 13 is located.
  • the inner wall of the octagonal hole of the driving hole 162 is the first inner surface 1621.
  • the first inner surface 1621 has a first driving surface 1621a and a second driving surface 1261b.
  • the motor shaft (not shown in the figure) rotates clockwise, and then the shaft lock frame 16 drives the output shaft 14 to rotate clockwise.
  • the output shaft 14 will lose its force due to inertia.
  • the first flat surface 1421 of the output shaft 14 can contact the first driving surface 1621a.
  • the motor shaft (not shown) rotates counterclockwise, and the shaft lock bracket 16 drives the output shaft 14 to rotate counterclockwise.
  • the output shaft 14 continues to rotate counterclockwise due to inertia.
  • the first flat surface 1421 of the output shaft 14 may contact the second driving surface 1621b.
  • the first mounting part 171 , the second mounting part 172 and the buffering part 173 of the damping assembly 17 are integrally formed components.
  • the first mounting part 171 , the second mounting part 172 and the buffering part 173 may be connected to form an integral component.
  • the buffer portion 173 is formed or connected with an elastic structure.
  • the damping components 17 are all elastic material components.
  • the first mounting portion 171 is inserted into the first mounting groove 143 extending along the second axis 102 direction on the rear end surface of the output shaft 14 .
  • the first mounting part 171 is provided in front of the second mounting part 172 .
  • the first mounting part 171 includes a first limiting part 1711.
  • the first mounting groove 143 defines a first receiving groove that cooperates with the first limiting portion 1711, and the first receiving groove is a rectangular or polygonal groove.
  • the second mounting portion 172 is inserted into the second mounting groove 165 formed on the rear end surface of the shaft lock frame 16 .
  • the first limiting portion 1711 extends along the radial direction of the first axis 101 .
  • the first mounting part 171 is a rectangular block or a polygonal block.
  • the first mounting part 171 and the second mounting part 172 are arranged front and back along the second axis 102 direction.
  • the second mounting part 172 includes a second limiting part 1721.
  • the second mounting groove 165 defines a second receiving groove 1651 that cooperates with the second limiting part 1721.
  • the second mounting part 172 and The shaft lock frame 16 realizes synchronous rotation, that is, the second limiting portion 1721 and the second receiving groove 1651 mutually restrict their circumferential rotational motion.
  • the second limiting portion 1721 extends along the radial direction of the second axis 102 .
  • the buffer portion 173 includes a first buffer portion 1731 extending along the second axis 102 and connected to the first mounting portion 171 .
  • the first buffer portion 1731 is cylindrical. It also includes a second buffer part 1732 extending in a direction perpendicular to the second axis 102 and connected to the second mounting part 172.
  • the second buffer part 1732 is centered on the second axis 102 and extends along the first buffer part 1731. circumferential arrangement.
  • the second buffer part 1732 includes a plurality of cylinders with a smaller diameter than the first buffer part 1731 .
  • the first buffer part 1731 and the second buffer part 1732 are fixedly connected.
  • the circumferential size of the first buffer portion 1731 is larger than the circumferential size of the first mounting portion 171 to limit the position of the first buffer portion 1731 along the second axis during installation.
  • the first buffer portion 1731 is prevented from entering the first installation groove 143 .
  • FIGS. 15 and 16 it is a power tool according to the second embodiment of the present application, which is different from the first embodiment in the specific structure of the damping assembly 27 .
  • the first mounting part and the first buffer part are combined with the first buffer part 2731 , and the first buffer part 2731 is a substantially V- or U-shaped structure extending along the second axis 202 .
  • the first mounting groove 243 is a groove extending along the second axis 202, and the width of the groove is smaller than the opening width of the first buffer portion and its corresponding position. So that the first buffer portion 2731 is in contact with the first installation groove 243 .
  • the second buffer part 2732 is connected to the first buffer part 2731.
  • the second mounting part 272 is connected to the second buffer part 2732.
  • the second mounting part 272 is arranged symmetrically. Since the first buffer part 2731 is a substantially V- or U-shaped structure extending along the second axis 202, the second mounting part 272 can be elastically deformed in a direction perpendicular to the second axis. So that the second mounting portion 272 is in contact with the second mounting groove 265 .

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

Abstract

一种动力工具，包括：锁定机构，用于在输出轴向电机轴传递扭矩时对输出轴进行锁止；锁定机构，包括：轴锁架，与输出轴连接以驱动输出轴；轴锁架包括，沿周向包围第一外周表面外的第一内表面；第一内表面和第一外周表面之间设置有第一间隙；阻尼组件，包括连接输出轴的第一安装部、连接轴锁架的第二安装部和缓冲部；其中，阻尼组件设置第一间隙之外并且至少部分缓冲部沿第二轴线方向延伸；缓冲部连接第一安装部与第二安装部；当输出轴与轴锁架发生相对运动时，缓冲部通过发生扭转变形以提供延迟输出轴相对于轴锁架运动的缓冲力。

Description

动力工具
本申请要求申请日为2022年6月29日、申请号为202210753497.9的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种电动工具，例如涉及一种通过旋转输出扭矩的动力工具。
背景技术
市场上的动力工具，例如电钻、螺丝批等作为代表的扭矩输出工具是种非常常用的动力工具。在这类通过旋转输出扭矩的动力工具中，由电机轴输出的扭矩经过传动机构传递至输出机构，最后作用在操作对象上。
在这类通过旋转输出扭矩的动力工具中，由电机输出轴带动输出轴转动为正向传动，当停机或换挡由于惯性或在人为主动旋转输出轴时，输出轴将受到的扭力传递给传动机构和电机轴为反向传动，反向传动往往对传动机构中部件例如齿轮造成损伤，影响寿命，并且在输出轴上扭下螺纹连接的夹头时，也不希望输出轴转动，所以这类动力工具中往往设有轴锁。
本部分提供了与本申请相关的背景信息，这些背景信息不一定是现有技术。
发明内容
本申请的一个目的是解决或至少减轻上述问题的一部分或者全部。为此，本申请提供了一种动力工具，能够解决轴锁部件碰撞的技术问题。
一实施例提供了一种动力工具，包括：壳体；马达，容纳于壳体中，马达包括以第一轴线为轴旋转的驱动轴；输出轴，用于输出扭矩；输出轴以第二轴线为轴旋转；锁定机构，用于在输出轴受力并向驱动轴传递扭矩时对输出轴进行锁止。其中，锁定机构，包括：轴锁架，与输出轴连接以驱动输出轴；阻尼组件，包括连接输出轴的第一安装部、连接轴锁架的第二安装部和连接第一安装部与第二安装部的缓冲部；当输出轴与轴锁架发生相对运动时，缓冲部通过发生扭转变形以提供延迟输出轴相对于轴锁架运动的缓冲力。
在一些实施例中，输出轴具有第一外周表面；轴锁架包括，沿周向包围在第一外周表面外的第一内表面。可选的，第一内表面和第一外周表面之间设置有第一间隙。可选的，阻尼组件设置第一间隙之外。
在一些实施例中，缓冲部至少部分沿第二轴线的方向延伸。
在一些实施例中，第一安装部、第二安装部和缓冲部为一体部件。
在一些实施例中，锁定机构，还包括：轴锁环，围绕输出轴设置；及锁定件，设置在轴锁环和输出轴之间，锁定件相对于轴锁环至少具有锁定位置和解锁位置。
在一些实施例中，轴锁环设置在壳体内，轴锁环与壳体不能发生相对转动。
在一些实施例中，当输出轴对驱动轴传递扭矩时，锁定件位于锁定位置，锁定件锁定输出轴相对于壳体的转动。当驱动轴向输出轴传递扭矩时，锁定件位于解锁位置，锁定件释放输出轴相对于壳体的转动。
在一些实施例中，轴锁架还连接或形成有插入轴锁环和锁定件之间的切换拨块，切换拨块用于拨动锁定件在锁定位置和解锁位置间切换。
在一些实施例中，通过配置第一间隙，轴锁架相对于输出轴在一个预设角度范围内转动。
在一些实施例中，第一安装部与输出轴同步旋转。
在一些实施例中，第二安装部与轴锁架构成同步旋转。
在一些实施例中，缓冲部包括沿第二轴线延伸并与第一安装部连接的第一缓冲部和沿垂直于第二轴线方向延伸并与第二安装部连接的第二缓冲部。
在一些实施例中，第一缓冲部与第二缓冲部固定连接或一体成型。
在一些实施例中，第一安装部与第二安装部沿第二轴线方向前后布置。
在一些实施例中，还包括电池包，电池包为马达供电。
一实施例还提供了一种动力工具，包括：壳体；马达，容纳于壳体中，马达包括以第一轴线为轴旋转的驱动轴；输出轴，用于输出扭矩；输出轴以第二轴线为轴旋转；输出轴具有第一外周表面；锁定机构，用于在输出轴受力并向驱动轴传递扭矩时对输出轴进行锁止；锁定机构连接马达和输出轴；锁定机构，包括：轴锁架，包括，至少包围在部分第一外周表面外的第一内表面；第一内表面和第一外周表面之间设置有第一间隙；阻尼组件，设置在第一间隙之外，当输出轴与轴锁架的发生相对运动时，阻尼组件沿输出轴的旋转方向以提供缓冲力，缓冲力延迟输出轴相对于轴锁架运动。
一实施例又提供了一种动力工具，包括：壳体；马达，容纳于壳体中，马达包括以第一轴线为轴旋转的驱动轴；输出轴，用于输出扭矩；输出轴以第二轴线为轴旋转；输出轴具有第一外周表面；锁定机构，用于在输出轴受力并向 驱动轴传递扭矩时对输出轴进行锁止；锁定机构连接马达和输出轴；锁定机构，包括：轴锁架，包括，至少包围部分第一外周表面外的第一内表面；第一内表面和第一外周表面之间设置有第一间隙；阻尼组件，设置第一间隙之外，阻尼组件包括弹性元件，当输出轴与轴锁架的发生相对运动时，弹性元件通过发生扭转变形以提供延迟输出轴相对于轴锁架运动的缓冲力。
在一些实施例中，阻尼组件包括连接输出轴的第一安装部、连接轴锁架的第二安装部和连接第一安装部与第二安装部的缓冲部。可选的，弹性元件设置缓冲部上。
在一些实施例中，锁定机构，还包括，轴锁环，围绕输出轴设置；及锁定件，设置在轴锁环和输出轴之间，锁定件相对于轴锁环至少具有锁定位置和解锁位置。
在一些实施例中，通过配置第一间隙，轴锁架相对于输出轴在一个预设角度范围内转动。
附图说明
图1是本申请中的第一实施例的结构图；
图2是图1中内部结构图和半剖视图的部分视图；
图3是图1中锁定机构的结构图；
图4是图1中锁定机构的爆炸图的示意图；
图5是图4中锁定机构的另一个视角结构示意图；
图6是图5中锁定机构的左视图结构示意图；
图7是图4中A-A的剖视图；
图8是图4中B-B的剖视图,其中，锁定件位于解锁位置；
图9是图4中C-C的剖视图,其中，锁定件位于解锁位置；
图10是图4中B-B的剖视图,其中，电机顺时针旋转，锁定件位于锁定位置；
图11是图4中C-C的剖视图，其中，电机顺时针旋转，锁定件位于锁定位置；
图12是图4中B-B的剖视图,其中，电机逆时针旋转，锁定件位于锁定位置；
图13是图4中C-C的剖视图,其中，电机逆时针旋转，锁定件位于锁定位置；
图14是图4中阻尼组件的结构示意图；
图15是本申请中的第二实施例的锁定机构的结构图；
图16是图15中阻尼组件的结构示意图。
具体实施方式
在详细解释本申请的任何实施方式之前，应当理解，本申请不限于其应用到以下描述中阐述的或以上附图中所示的结构细节和组件布置。
在本申请中，术语“包括”、“包含”、“具有”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
在本申请中，术语“和/或”，是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“和/或”的关系。
本申请中，术语“连接”、“结合”、“耦合”、“安装”可以是直接连接、结合、耦合或安装，也可以是间接连接、结合、耦合或安装。其中，进行举例示范，直接连接指的是两个零件或组件之间不需设置中间件而连接在一起，间接连接指的是两个零件或组件分别与至少一个中间件连接，这两个零件或组件通过中间件实现连接。此外，“连接”和“耦合”不限于物理或机械连接或耦合，并且可以包括电连接或耦合。
在本申请中，本领域普通技术人员将理解，结合数量或条件使用的相对术语(例如，“约”，“大约”，“基本”等)为包括所述值并且具有上下文所指示的含义。例如，该相对术语至少包括与特定值的测量相关的误差程度，与特定值相关的由制造，组装，使用造成的公差等。这种术语也应被视为公开了由两个端点的绝对值限定的范围。相对术语可指代所指示的值的一定百分比(例如1％，5％，10％或更多)的加或减。未采用相对术语的数值，也应该被揭示为具有公差的特定值。此外，“基本”在表达相对的角度位置关系时(例如，基本平行，基本垂直)，可指代在所指示的角度的基础上加或减一定度数(例如1度，5度，10度或更多)。
在本申请中，本领域普通技术人员将理解，由组件执行的功能可以为由一个组件，多个组件，一个零件，或多个零件执行。同样的，由零件执行的功能 也可以由一个零件，一个组件，或多个零件组合来执行。
在本申请中，术语“上”、“下”、“左”、“右”、“前”、“后”等方位词是以附图所示的方位和位置关系来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。还应当理解的，上侧、下侧、左侧、右侧、前侧、后侧等方位词不仅代表正方位，也可以理解为侧方位。例如，下方可以包括正下方、左下方、右下方、前下方以及后下方等。
为了清楚的说明本申请的技术方案，还定义了如图1所示的上侧、下侧、前侧和后侧。
如图1示出了本申请的一实施例的动力工具，该动力工具为一种电钻100。可以理解的，在其他可替换实施例中，该动力工具也可以是其他通过旋转输出扭矩的动力工具，比如电动螺丝批、或者兼具螺丝批和电钻功能的工具，还可以为其它将旋转扭力转化为其它的运动形式的工具,例如打磨类工具，例如角磨、砂光机等。
如图1至图3示出了本申请的一实施例的电钻100,包括电源装置30。其中，电源装置30用于为电钻100提供电能。在本实施例中，电源装置30为电池包，电池包配合相应的电源电路，为电钻100供电。本领域技术人员应当理解，电源装置30并不限于使用电池包的场景，还可通过市电、交流电源，配合相应的整流、滤波和调压电路，实现对机内的相应部件供电。
电钻100包括壳体11、马达12、传动机构19和输出机构13。其中，壳体11包括用于容纳电机的电机壳体111。马达12包括以第一轴线101为轴转动的驱动轴(图中未示出)。在本实施例中，马达12具体设置为电机，下文将用电机12代替马达，使用电机轴代替驱动轴，但其并不能作为对本申请的限制。
壳体11还形成或连接有一供用户操作的握持部113。握持部113与电机壳体111形成T型或L型结构，方便用户握持及操作。握持部113的一端连接有电源装置30。电源装置30可拆卸地连接至握持部113。
电钻100还包括开关122，开关122安装于握持部113上。用户在握持握持部113时，能够相对方便的触发开关122，该开关122可以被设置为用于启动该电钻100的主开关122。
输出机构13用于接收电机12提供的扭矩并输出扭矩。输出机构13包括用于 连接工作附件并驱动工作附件旋转的输出轴14。输出轴14前端设有夹持组件132或收容部，可在实现不同功能时夹持相应的工作附件，例如螺丝批、钻头、套筒等。
输出轴14用于输出动力，输出轴14以输出轴线为轴转动，在本实施例中，输出轴线为第二轴线102。在本实施例中，第一轴线101与第二轴线102重合。在其他可替换实施例中，第二轴线102与第一轴线101之间呈一定角度的夹角设置。在其他可替换实施例中，第一轴线101与第二轴线102相互平行但不重合设置。
传动机构19设置在电机12和输出机构13之间，用于在电机12和输出机构13之间实现动力的传递。
传动机构19包括：用于减速的行星轮系，行星轮系的数目可以为一级也可以为多级。行星轮系按照一定的传动比转化电机12的输出转速，以达到合适的扭矩。同时，传动机构19还包括换挡组件，以实现通过多组不同传动比的齿轮实现多档输出。
如图3-图14所示，电钻100还包括锁定机构15，以实现单向传动的轴锁功能。锁定机构15用于在输出轴14反向对电机轴(图中未示出)传递扭矩时对输出轴14的旋转进行锁止，锁定机构15连接传动机构19和输出机构13。
在其他可替换的实施例中，可以不设置传动机构19。电机轴(图中未示出)直接驱动输出机构13。锁定机构15连接电机12和输出机构13。
在其他可替换实施例中，动力工具可以冲击类旋转动力工具，此时，传动机构与锁定机构15之间设置有用于提供冲击力的冲击机构。冲击机构用于向输出轴提供冲击力。
在本实施例中，锁定机构15包括轴锁架16、阻尼组件17、轴锁环151和锁定件154。其中，轴锁架16作为锁定机构15的扭矩输入组件，轴锁架16连接传动机构19和输出机构13。轴锁架16连接最靠近输出机构13的行星轮组191和输出轴14。在本实施例中，输出轴14与轴锁架16可转动的连接。在其他可替换实施例中，输出轴14上可以连接其他部件构成一个输出部后再与轴锁架16连接。只要构成的输出部与输出轴14能同步转动，则构成的输出部与轴锁架16连接和输出轴14直接与轴锁架16连接并不是本申请的限制。同样可以理解，轴锁架16上可以在连接其他部件后构成一个输入组件，只要构成的输入组件与轴锁架16同步转动，其并不是本申请的限制。
输出轴14具有第一外周表面142。轴锁架16包括至少包围部分第一外周表面 142外的第一内表面1621。第一内表面1621和第一外周表面142之间设置有第一间隙1622。阻尼组件17包括：第一安装部171、第二安装部172和缓冲部173。其中，第一安装部171连接输出轴14，第二安装部172连接轴锁架16，缓冲部173连接第一安装部171和第二安装部172。阻尼组件17设置在第一间隙1622之外，即是说，阻尼组件17不会插入或嵌入第一间隙1622内。至少部分缓冲部173沿第二轴线102方向延伸。当输出轴14发生与轴锁架16的相对运动时，缓冲部173通过发生扭转变形以提供延迟输出轴14相对于轴锁架16运动的缓冲力。
在本实施例中，轴锁环151围绕输出轴14设置。锁定件154设置在轴锁环151和输出轴14之间，锁定件154相对于轴锁环151至少具有锁定位置和解锁位置。当输出轴14反向对电机轴(图中未示出)传递扭矩时，锁定件154位于锁定位置，锁定件154锁定输出轴14相对于壳体11的转动。当电机轴(图中未示出)向输出轴14传递扭矩时，锁定件154位于解锁位置时，锁定件154释放输出轴14的转动。轴锁架16还包括或形成有插入轴锁环151和锁定件154之间的切换拨块164，切换拨块164拨动锁定件154在锁定位置和解锁位置间切换。通过配置第一间隙1622，轴锁架16相对于输出轴14在一个预设角度范围内转动，以使轴锁架16驱动锁定件154在锁定位置和解锁位置间切换。
如图8-图9所示，在动力工具工作过程，在由电机12带动输出轴14转动的正向传动时，输出轴14和轴锁架16同步或基本同步旋转，锁定件154位于解锁位置时，锁定件154释放输出轴14的转动。
当由于停机、换挡或者刹车等电机12速度突然发生变化时，会出现输出轴14由于惯性导致转速超过轴锁架16的情况，也会发生输出轴14反向对电机轴(图中未示出)传递扭矩。此时由于惯性导致输出轴14与轴锁架16之间会发生相对运动。当输出轴14速度过快时，不及时缓冲输出轴14的转速，输出轴14会带着惯性碰撞到锁定机构15。
本实施例提供的阻尼组件17的缓冲部173沿轴向延伸，在输出轴14和轴锁架16发生相对运动时，输出轴14带动缓冲部173发生扭转变形，缓冲部173同时向输出轴14施加恢复原始状态的回弹力，此回弹力缓冲输出轴14相对于轴锁架16运动，即此回弹力作为缓冲力，延迟了输出轴14相对于轴锁架16运动。输出轴14撞击锁定机构15的冲击力也会有一定的减小，改善刹车时由于惯性发生的撞击问题，特别是可以有效改善撞击的噪声问题。同时，与相关技术中阻尼结构设置第一间隙1622内或阻尼机构通过发生垂直于第二轴线102直线往复变形而 产生的缓冲力相比，本实施例的阻尼组件17设置在第一间隙1622之外，不影响第一间隙1622的功能以及不增加其设计和组装难度。同时，输出轴14的运动方向和缓冲力的提供方向基本不存在分力，即是说，输出轴14和缓冲部173均发生绕第二轴线102的旋转。因此，缓冲的效率更高，锁定机构15在正向传动过程中由于输出轴14与轴锁架16基本是同步运动，进而不增加阻尼，不影响整机效率。
在本实施例中，输出轴14形成或连接有传动部141，传动部141具体为外六角部。第一外周表面142为外六角部的外表面。
轴锁环151固定设置在壳体11内，即是说轴锁环151与壳体11不能发生相对转动。轴锁环151围绕套装在输出轴14设置，轴锁环151和输出轴14之间形成有第一容置空间152，锁定件154位于轴锁环151和输出轴14之间所形成的第一容置空间152处。
如图4至图5所示，轴锁架16包括主体部161、连接行星轮组191的行星轮架163和上述的切换拨块164。切换拨块164和行星轮架163分别设置主体部161的两侧。主体部161大致呈现一个圆盘式的结构。
主体部161还形成有一个驱动孔162。输出轴14的传动部141伸入至驱动孔162内。在本实施例中，输出轴14的传动部141为外六角结构，对应的驱动孔162为能用于允许传动部141在驱动孔162内并能相对轴锁架16在一个预设角度范围内转动的十八边形孔，当然该驱动孔162的具体结构并不以此为限。只要驱动孔162的结构能够允许传动部141在驱动孔162内相对轴锁架16在一个预设角度范围内转动均属于本发明所保护的范围。可选的，输出轴14的传动部141也并不以外六角结构为限，输出轴14的传动部141还可以为其它的传动结构，对应的，驱动孔162的结构只要能够允许传动部141在驱动孔162内相对轴锁架16在一个预设角度范围内转动即可。
在一些实施例中，轴锁环151形成有以第二轴线102为中心线的圆柱面153，圆柱面153围绕输出轴14形成上述的第一容置空间152。
输出轴14的外周即第一外周表面142包括：第一平面1421和第二平面1422。其中，第一平面1421平行于第一轴线101，第二平面1422也平行于第一轴线101。
可选的，锁定件154为圆柱销，圆柱销设置在第一平面1421和圆柱面153之间。在本实施例中，为了提高稳定性，第一平面1421的数目为3。对应的，圆柱销的数目也为3。切换拨块164的数目也为3，三个切换拨块164分别位于相邻的两个圆柱销之间以推动的圆柱销在围绕第二轴线102的圆周方向上移动。当锁定 件154位于图9所示的解锁位置时，锁定件154可以在圆柱面153以及第一平面1421之间转动，轴锁架16能够驱动输出轴14相对壳体11转动。而当由于输出轴14反向传动或其他驱动力，而使锁定件154位于图11和图13所述的锁定位置时，锁定件154同时与圆柱面153和第一平面1421抵接，这时锁定件154在围绕第一轴线101的圆周方向上的位置被限位，这时输出轴14相对壳体11的转动被锁定，即是说，输出轴14相对轴锁环151的转动被锁定。从而这时用户不能从输出机构13所在的一侧使得输出轴14相对壳体11转动。
如图8-图13所示，在本实施例中，驱动孔162的十八边形孔的内侧壁为第一内表面1621，为保证输出轴14不论顺时针还是逆时针旋转均能在锁定和解锁位置切换。第一内表面1621具有第一驱动面1621a和第二驱动面1261b。其中，如图10-图11所示，电机轴(图中未示出)顺时针旋转，进而轴锁架16驱动输出轴14顺时针旋转，在突然刹车或换挡时，输出轴14由于惯性继续顺时针旋转，输出轴14第一平面1421可以与第一驱动面1621a接触。如图12和图13所示，电机轴(图中未示出)逆时针旋转，进而轴锁架16驱动输出轴14逆时针旋转，在突然刹车或换挡时，输出轴14由于惯性继续逆时针旋转，输出轴14第一平面1421可以与第二驱动面1621b接触。
如图14所示，阻尼组件17的第一安装部171、第二安装部172和缓冲部173为一体成型部件。在其他可替换实施例中，第一安装部171、第二安装部172和缓冲部173可以为通过连接而成一个整体的部件。缓冲部173形成或连接有弹性结构。在本实施例中，阻尼组件17均为弹性材料部件。
第一安装部171插入输出轴14的后端面沿第二轴线102方向延伸设置的第一安装槽143。如图14所示，第一安装部171设置在第二安装部172前方。第一安装部171包括第一限位部1711。第一安装槽143开设有与第一限位部1711配合的第一收容槽，第一收容槽为矩形或多边形槽。通过第一限位部1711与第一收容槽的配合，第一安装部171与输出轴14实现同步旋转，即第一限位部1711与第一收容槽相互限制其周向旋转运动。第二安装部172嵌卡安装于轴锁架16的后端面上开设得第二安装槽165内。在一些实施例中，第一限位部1711沿第一轴线101的径向延伸设置。在本实施例中，第一安装部171为矩形块或多边形块。
第一安装部171与第二安装部172沿第二轴线102方向前后布置。第二安装部172包括第二限位部1721。第二安装槽165开设有与第二限位部1721配合的第二收容槽1651，通过第二限位部1721与第二收容槽1651的配合，第二安装部172与 轴锁架16实现同步旋转，即第二限位部1721与第二收容槽1651相互限制其周向旋转运动。在本实施例中，第二限位部1721沿第二轴线102的径向延伸设置。
缓冲部173包括沿第二轴线102延伸并与第一安装部171连接的第一缓冲部1731，在本实施例中，第一缓冲部1731呈圆柱型。还包括沿垂直于第二轴线102方向延伸并与第二安装部172连接的第二缓冲部1732，在本实施例中，第二缓冲部1732以第二轴线102为中心沿第一缓冲部1731的周向布置。第二缓冲部1732包括多个直径小于第一缓冲部1731的圆柱。第一缓冲部1731与第二缓冲部1732固定连接。
第一缓冲部1731的周向尺寸大于第一安装部171的周向尺寸，以限制在安装时第一缓冲部1731沿第二轴线的位置。防止第一缓冲部1731进入第一安装槽143内。
如图15和图16所示，为本申请的第二实施例的动力工具，其与第一实施例区别阻尼组件27的具体结构不同。
其中，第一安装部和第一缓冲部合并第一缓冲部2731，第一缓冲部2731为沿第二轴线202延伸的大致呈V或U型的结构。第一安装槽243为沿第二轴线202延伸的槽，槽口宽度小于第一缓冲部与其对应位置的开口宽度。以使第一缓冲部2731抵接在第一安装槽243内。
第二缓冲部2732与第一缓冲部2731连接。第二安装部272与第二缓冲部2732连接。第二安装部272对称设置，由于第一缓冲部2731为沿第二轴线202延伸的大致呈V或U型的结构，所以第二安装部272在垂直于第二轴线方向的可以发生弹性变形。以使第二安装部272抵接在第二安装槽265内。
以上显示和描述了本申请的基本原理、主要特征和优点。本行业的技术人员应该了解，上述实施例不以任何形式限制本申请，凡采用等同替换或等效变换的方式所获得的技术方案，均落在本申请的保护范围内。

Claims (20)

  1. 一种动力工具，包括：
    壳体；
    马达，容纳于所述壳体中，所述马达包括以第一轴线为轴旋转的驱动轴；
    输出轴，用于输出扭矩；所述输出轴以第二轴线为轴旋转；
    锁定机构，用于在所述输出轴受力并向所述驱动轴传递扭矩时对所述输出轴进行锁止；其中，所述锁定机构，包括：
    轴锁架，与所述输出轴连接以驱动所述输出轴；及
    阻尼组件，包括连接所述输出轴的第一安装部、连接所述轴锁架的第二安装部和连接所述第一安装部与所述第二安装部的缓冲部；当所述输出轴与所述轴锁架发生相对运动时，所述缓冲部通过发生扭转变形以提供延迟所述输出轴相对于所述轴锁架运动的缓冲力。
  2. 根据权利要求1所述的动力工具，其中，
    所述输出轴具有第一外周表面；
    所述轴锁架包括，沿周向包围在所述第一外周表面外的第一内表面；所述第一内表面和所述第一外周表面之间设置有第一间隙；所述阻尼组件设置所述第一间隙之外。
  3. 根据权利要求1所述的动力工具，其中，所述缓冲部至少部分沿所述第二轴线的方向延伸。
  4. 根据权利要求1所述的动力工具，其中，所述第一安装部、所述第二安装部和所述缓冲部为一体部件。
  5. 根据权利要求1所述的动力工具，其中，所述锁定机构，还包括，
    轴锁环，围绕所述输出轴设置；及
    锁定件，设置在所述轴锁环和所述输出轴之间，所述锁定件相对于所述轴锁环至少具有锁定位置和解锁位置。
  6. 根据权利要求5所述的动力工具，其中，所述轴锁环设置在所述壳体内，所述轴锁环与所述壳体不能发生相对转动。
  7. 根据权利要求5所述的动力工具，其中，当所述输出轴对所述驱动轴传递扭矩时，所述锁定件位于所述锁定位置，所述锁定件锁定所述输出轴相对于所述壳体的转动；
    当所述驱动轴向所述输出轴传递扭矩时，所述锁定件位于所述解锁位置，所述锁定件释放所述输出轴相对于所述壳体的转动。
  8. 根据权利要求5所述的动力工具，其中，所述轴锁架还连接或形成有插入所述轴锁环和所述锁定件之间的切换拨块，所述切换拨块用于拨动所述锁定件在所述锁定位置和所述解锁位置间切换。
  9. 根据权利要求2所述的动力工具，其中，通过配置所述第一间隙，所述轴锁架相对于所述输出轴在一个预设角度范围内转动。
  10. 根据权利要求1所述的动力工具，其中，所述第一安装部与所述输出轴同步旋转。
  11. 根据权利要求1所述的动力工具，其中，所述第二安装部与所述轴锁架构成同步旋转。
  12. 根据权利要求1所述的动力工具，其中，所述缓冲部包括沿第二轴线延伸并与所述第一安装部连接的第一缓冲部和沿垂直于第二轴线方向延伸并与所述第二安装部连接的第二缓冲部。
  13. 根据权利要求12所述的动力工具，其中，第一缓冲部与所述第二缓冲部固定连接或一体成型。
  14. 根据权利要求1所述的动力工具，其中，所述第一安装部与所述第二安装部沿所述第二轴线方向前后布置。
  15. 根据权利要求1所述的动力工具，其中，还包括电池包，所述电池包为所述马达供电。
  16. 一种动力工具，包括：
    壳体；
    马达，容纳于所述壳体中，所述马达包括以第一轴线为轴旋转的驱动轴；
    输出轴，用于输出扭矩；所述输出轴以第二轴线为轴旋转；所述输出轴具有第一外周表面；及
    锁定机构，用于在所述输出轴受力并向所述驱动轴传递扭矩时对所述输出轴进行锁止；所述锁定机构连接所述马达和所述输出轴；
    其中，
    所述锁定机构，包括：
    轴锁架，包括，至少包围在部分所述第一外周表面外的第一内表面；所述第一内表面和所述第一外周表面之间设置有第一间隙；及
    阻尼组件，设置在所述第一间隙之外，当所述输出轴与所述轴锁架的发生相对运动时，所述阻尼组件沿所述输出轴的旋转方向以提供缓冲力，所述缓冲 力延迟所述输出轴相对于所述轴锁架运动。
  17. 一种动力工具，包括：
    壳体；
    马达，容纳于所述壳体中，所述马达包括以第一轴线为轴旋转的驱动轴；
    输出轴，用于输出扭矩；所述输出轴以第二轴线为轴旋转；所述输出轴具有第一外周表面；及
    锁定机构，用于在所述输出轴受力并向所述驱动轴传递扭矩时对所述输出轴进行锁止；所述锁定机构连接所述马达和所述输出轴；
    其中，
    所述锁定机构，包括：
    轴锁架，包括，至少包围部分所述第一外周表面外的第一内表面；所述第一内表面和所述第一外周表面之间设置有第一间隙；及
    阻尼组件，设置所述第一间隙之外，所述阻尼组件包括弹性元件，当所述输出轴与所述轴锁架的发生相对运动时，所述弹性元件通过发生扭转变形以提供延迟所述输出轴相对于所述轴锁架运动的缓冲力。
  18. 根据权利要求17所述的动力工具，其中，阻尼组件包括连接所述输出轴的第一安装部、连接所述轴锁架的第二安装部和连接所述第一安装部与所述第二安装部的缓冲部，所述弹性元件设置所述缓冲部上。
  19. 根据权利要求17所述的动力工具，其中，所述锁定机构，还包括，
    轴锁环，围绕所述输出轴设置；及
    锁定件，设置在所述轴锁环和所述输出轴之间，所述锁定件相对于所述轴锁环至少具有锁定位置和解锁位置。
  20. 根据权利要求17所述的动力工具，其中，通过配置所述第一间隙，所述轴锁架相对于所述输出轴在一个预设角度范围内转动。
PCT/CN2023/102094 2022-06-29 2023-06-25 动力工具 Ceased WO2024001949A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1605439A (zh) * 2003-06-24 2005-04-13 密尔沃基电动工具公司 驱动机构和电动工具
CN105215915A (zh) * 2014-06-30 2016-01-06 南京德朔实业有限公司 扭力输出工具
DE202016107390U1 (de) * 2015-12-28 2017-01-23 Chervon (Hk) Limited Drehmomentausgangswerkzeug
CN106584370A (zh) * 2015-10-14 2017-04-26 南京德朔实业有限公司 传动机构以及具有该传动机构的扭矩输出工具
CN211661970U (zh) * 2019-12-27 2020-10-13 宁波新港工具有限公司 用于电动工具前端转动部件的防反自锁结构
CN112192518A (zh) * 2020-03-02 2021-01-08 群胜科技（苏州）有限公司 一种改良结构的无间隙主轴锁定装置
CN116619308A (zh) * 2023-05-16 2023-08-22 何全政 用于动力工具的定扭模块

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW588680U (en) * 2003-03-06 2004-05-21 Power Network Industry Co Ltd Locking device for output shaft
US7377331B2 (en) * 2005-04-06 2008-05-27 Power Network Industry Co., Ltd. Damping driving axle
US20110278133A1 (en) * 2010-05-12 2011-11-17 Top Gearbox Industry Co., Ltd Gapless main shaft locking apparatus
DE202014006371U1 (de) * 2014-08-05 2014-11-13 Trinity Precision Technology Co., Ltd. Spaltlose Spannfutter-Sicherungs-Einrichtung
KR101715280B1 (ko) * 2015-10-28 2017-03-13 계양전기 주식회사 전동 공구
CN205414485U (zh) * 2015-11-16 2016-08-03 南京龙灵机械贸易有限公司 一种消除轴锁异音结构
CN208084284U (zh) * 2018-02-12 2018-11-13 南京德朔实业有限公司 动力工具
CN209999122U (zh) * 2019-03-13 2020-01-31 创科（澳门离岸商业服务）有限公司 电动工具
US11975436B2 (en) * 2021-03-08 2024-05-07 Milwaukee Electric Tool Corporation Spindle lock for power tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1605439A (zh) * 2003-06-24 2005-04-13 密尔沃基电动工具公司 驱动机构和电动工具
CN105215915A (zh) * 2014-06-30 2016-01-06 南京德朔实业有限公司 扭力输出工具
CN106584370A (zh) * 2015-10-14 2017-04-26 南京德朔实业有限公司 传动机构以及具有该传动机构的扭矩输出工具
DE202016107390U1 (de) * 2015-12-28 2017-01-23 Chervon (Hk) Limited Drehmomentausgangswerkzeug
CN211661970U (zh) * 2019-12-27 2020-10-13 宁波新港工具有限公司 用于电动工具前端转动部件的防反自锁结构
CN112192518A (zh) * 2020-03-02 2021-01-08 群胜科技（苏州）有限公司 一种改良结构的无间隙主轴锁定装置
CN116619308A (zh) * 2023-05-16 2023-08-22 何全政 用于动力工具的定扭模块

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4516454A4

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