WO2022062983A1 - 电锤 - Google Patents

电锤 Download PDF

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Publication number
WO2022062983A1
WO2022062983A1 PCT/CN2021/118443 CN2021118443W WO2022062983A1 WO 2022062983 A1 WO2022062983 A1 WO 2022062983A1 CN 2021118443 W CN2021118443 W CN 2021118443W WO 2022062983 A1 WO2022062983 A1 WO 2022062983A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
electric hammer
axis
assembly
swing rod
Prior art date
Application number
PCT/CN2021/118443
Other languages
English (en)
French (fr)
Inventor
韩言
姚久玲
蔡建恒
孙红波
Original Assignee
南京泉峰科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202022143093.7U external-priority patent/CN214055145U/zh
Priority claimed from CN202011021012.4A external-priority patent/CN114248237A/zh
Priority claimed from CN202022143274.XU external-priority patent/CN214443584U/zh
Priority claimed from CN202022151258.5U external-priority patent/CN214055146U/zh
Priority claimed from CN202011022734.1A external-priority patent/CN114248238A/zh
Priority claimed from CN202011021007.3A external-priority patent/CN114248236A/zh
Application filed by 南京泉峰科技有限公司 filed Critical 南京泉峰科技有限公司
Priority to EP21871354.3A priority Critical patent/EP4190496A4/en
Publication of WO2022062983A1 publication Critical patent/WO2022062983A1/zh
Priority to US18/177,535 priority patent/US20230202015A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION 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
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006Mode changers; Mechanisms connected thereto
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D11/00Portable percussive tools with electromotor or other motor drive
    • B25D11/06Means for driving the impulse member
    • B25D11/062Means for driving the impulse member comprising a wobbling mechanism, swash plate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D16/00Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003Clutches specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0023Tools having a percussion-and-rotation mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007Details of percussion or rotation modes
    • B25D2216/0038Tools having a rotation-only mode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2216/00Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0084Mode-changing mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2217/00Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0011Details of anvils, guide-sleeves or pistons
    • B25D2217/0019Guide-sleeves
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/091Electrically-powered tool components
    • B25D2250/095Electric motors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/121Housing details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/331Use of bearings

Definitions

  • This application requires the application date to be September 25, 2020, the application number to be 202011022734.1, the application date to be September 25, 2020, the application date to be 202011021007.3, the application date to be September 25, 2020, the application number to be 202022143093.7, and the application date
  • the entire contents of the aforementioned application are incorporated herein by reference.
  • the present application relates to a power tool, such as an electric hammer.
  • Electric hammer is a widely used electric tool, mainly used to drill holes in concrete, floor, brick wall and stone. There are many electric hammers in related technologies, which can adjust to the appropriate position while realizing the drilling function. With the appropriate drill, it can replace the ordinary electric drill, which is what we call the hammer drill mode and the drill mode.
  • the present application provides an electric hammer, which has a simple structure and is convenient for users to switch functions.
  • An embodiment provides an electric hammer, including: a casing; a motor, at least partially disposed in the casing; an output assembly, including a sleeve that can rotate around a first axis; an impact assembly, including a swing rod bearing and a swingable The rod bearing is driven to reciprocate the impact block in the sleeve, and the impact block can output the impact force forward when moving in the sleeve; the installation shaft is set to install the pendulum rod bearing, and the installation shaft can be driven by the motor to rotate around the second axis ;
  • the electric hammer has a drill mode and a hammer-drill mode; when the electric hammer is in the drill mode, the sleeve rotates; when the electric hammer is in the hammer-drill mode, the sleeve rotates, and the impact block reciprocates in the sleeve; the electric hammer also includes : the clutch assembly, which has a first state that can drive the swing rod bearing to
  • the switching element is arranged between the first axis and the second axis.
  • the sleeve is arranged substantially symmetrically with respect to a vertical plane; the portion of the switching element between the first axis and the second axis is distributed on both sides of the plane.
  • the electric hammer further includes: a first transmission member, the first transmission member is configured to receive the power output by the motor to drive the installation shaft to rotate;
  • the clutch assembly includes: an input part, which is synchronized with the first transmission member or the installation shaft Rotation; the output part drives the pendulum bearing to move when it cooperates with the input part; the pendulum bearing can slide along the second axis on the installation shaft, the output part can slide along the second axis along with the pendulum bearing, and the switching element is arranged on the The front side of the swing rod bearing can drive the whole composed of the swing rod bearing and the output part to slide along the second axis.
  • the rocker bearing includes a bearing core mounted to the mounting shaft, the bearing core extending towards the first transmission member to form the output portion.
  • the electric hammer further includes a support bracket, which is fixedly connected to or integrally formed with the casing, the support bracket is configured to support the installation shaft; the support bracket is formed or fixedly connected with a guide groove for the movement of the switching element.
  • the switching element is arranged between the sleeve and the mounting shaft.
  • the output assembly further includes: a first transmission part, which is fixedly connected to the sleeve; a second transmission part, which rotates synchronously with the installation shaft, and the second transmission part drives the first transmission part to rotate;
  • the orthographic projection in the plane perpendicular to the first axis has the highest point and the lowest point, and the orthographic projection of the switching element in the plane is located between the highest point and the lowest point.
  • An electric hammer includes: a casing; a motor at least partially disposed in the casing; an output assembly including a sleeve rotatable about a first axis; an impact assembly including a pendulum rod bearing and being driven by the pendulum rod bearing to The reciprocating impact block in the sleeve can output the impact force forward when the impact block moves in the sleeve; the installation shaft is set to install the pendulum rod bearing, and the installation shaft can be driven by the motor to rotate around the second axis; the electric hammer has a drill mode and hammer-drilling mode; when the electric hammer is in the drilling mode, the sleeve rotates; when the electric hammer is in the hammer-drilling mode, the sleeve rotates, and the impact block reciprocates in the sleeve; the electric hammer also includes: a clutch assembly with A first state in which the swing rod bearing can be driven to move with the installation shaft and a second state
  • the electric hammer further includes: a transmission assembly, including a first transmission member that can be driven by the motor to rotate around the second axis, the first transmission member is fixedly connected with the installation shaft;
  • the swing rod bearing includes a Bearing core, when the electric hammer is in the hammer drill mode, the sleeve rotates, and the bearing core and the installation shaft form a synchronous rotation;
  • the pendulum rod bearing can slide along the second axis on the installation shaft to the first position and the second position;
  • the rod bearing is in the first position, the bearing core and the installation shaft rotate synchronously;
  • the pendulum rod bearing is in the second position, the installation shaft can rotate relative to the bearing core;
  • the locking element restricts the rotation of the bearing core at any time, and when the rocker bearing is in the first position, the locking element allows the bearing core to rotate.
  • the bearing core is connected with a snap portion arranged to cooperate with the locking element.
  • the transmission assembly includes: an input part configured to output power to the swing rod bearing; the bearing core is connected with an output part that cooperates with the input part when the swing rod bearing is in the first position.
  • the output portion and the clamping portion are respectively disposed at both ends of the bearing core.
  • the locking element is fixedly connected with the housing or formed in one piece.
  • the bearing core protrudes forward to form a clamping portion.
  • the electric hammer further comprises: a switching element configured to drive the pendulum bearing to move toward the first position to cause the electric hammer to enter the hammer-drilling mode.
  • the clamping portion is disposed at one end of the bearing core that is close to the switching element.
  • the electric hammer further includes: a reset member, which biases the rocker rod bearing to move toward a position where the clamping portion cooperates with the locking element.
  • the electric hammer further includes: a transmission assembly, including a first transmission member that can be driven by the motor to rotate around the second axis, the first transmission member is fixedly connected with the installation shaft;
  • the swing rod bearing includes a Bearing core, when the electric hammer is in the hammer drill mode, the sleeve rotates, and the bearing core and the installation shaft form a synchronous rotation;
  • the pendulum rod bearing can slide along the second axis on the installation shaft to the first position and the second position;
  • the electric hammer also includes a locking element, when the pendulum rod bearing is in the first position In the second position, the locking element is separated from the bearing core to allow the bearing core to rotate; when the swing rod bearing is in the second position, the locking element is engaged with the bearing core to restrict the bearing core from rotating.
  • the electric hammer includes a main engine, and the main engine includes a casing; the sleeve has a length L1 along the first axis direction; the main engine has a length L2 along the first axis direction; the casing is perpendicular to the first axis direction.
  • the output assembly further includes: a first transmission part, which cooperates with the installation shaft and is configured to transmit the power of the motor to the sleeve; A matching middle piece; wherein, a accommodating space for accommodating the middle piece is formed on the rotating piece.
  • the diameter of the accommodating space is smaller than the diameter of the root circle of the rotating member.
  • the transmission assembly further includes an input part configured to output power to the swing rod bearing; the swing rod bearing is connected with an output part matched with the input part; when the electric hammer is in the drilling mode, the output part and the output part are connected with each other. away; when the electric hammer is in the hammer-drilling mode, the output part is combined with the input part.
  • the pendulum rod bearing includes a bearing core mounted on the mounting shaft, the bearing core protrudes rearward to form an output portion; the first transmission member is recessed inward to form an input portion.
  • the electric hammer further includes a switching element configured to drive the pendulum bearing to move along the second axis to couple the output portion with the input portion.
  • the electric hammer further includes: a shift assembly, the shift assembly includes a limit portion configured to prevent the switching element from retreating in the direction of the first axis; the switching element is fixedly connected or integrally formed with the limit portion.
  • the matching stop part when the electric hammer is in the drill mode, the stop part abuts against the stop part so that the switching element cannot move backwards in the direction of the first axis; when the electric hammer is in the hammer drill mode, the limit part is in contact with the stop part.
  • the stopper is separated to allow the switching element to move rearward in the direction of the first axis.
  • the electric hammer further comprises a first bearing and a second bearing mounted on the mounting shaft to support the mounting shaft; wherein the distance between the first bearing and the second bearing in the direction of the second axis is greater than or equal to 30mm and less than or equal to 30mm. Equal to 50mm.
  • first bearing and the second bearing are respectively arranged on two sides of the swing rod bearing, and the first transmission part is arranged on the front side of the first bearing and the second bearing.
  • the length of the sleeve along the first axis direction is less than or equal to 101 mm.
  • Fig. 2 is a plan view of the partial structure of the electric hammer shown in Fig. 1;
  • Fig. 3 is the top view of the electric hammer machine shown in Fig. 1;
  • Fig. 4 is the sectional view of the electric hammer shown in Fig. 3 along the A-A direction;
  • Fig. 5 is a partial structural perspective view of the electric hammer shown in Fig. 1 when it is in a drilling mode;
  • Fig. 6 is a partial structural plan view of the electric hammer shown in Fig. 1 when it is in the hammer-drilling mode;
  • FIG. 7 is a cross-sectional view of the electric hammer shown in FIG. 3 along the B-B direction;
  • Fig. 8 is the partial structure schematic diagram of the electric hammer shown in Fig. 1;
  • Fig. 9 is the partial structure schematic diagram of the electric hammer shown in Fig. 1;
  • Fig. 10 is a plan view of the partial structure of the electric hammer shown in Fig. 1;
  • Fig. 11 is an exploded view of a part of the structure of the electric hammer shown in Fig. 1;
  • Figure 12 is an exploded view from another perspective of the partial structure of the hammer shown in Figure 11;
  • Fig. 13 is a partial exploded view of the electric hammer shown in Fig. 1;
  • Figure 14 is a top view of the impact assembly in the electric hammer shown in Figure 1;
  • Fig. 15 is a cross-sectional view of the swing rod bearing shown in Fig. 14 along the direction A-A;
  • Fig. 17 is a cross-sectional view of the electric hammer shown in Fig. 16 along the direction of the second axis;
  • Fig. 18 is a partial structural schematic diagram of the electric hammer shown in Fig. 16 when it is in the hammer-drilling mode;
  • Fig. 19 is a partial structural schematic diagram of the electric hammer shown in Fig. 16 when it is in the drilling mode;
  • Fig. 20 is a partial enlarged view of the structure shown in Fig. 19;
  • Fig. 21 is a partial exploded view of the electric hammer shown in Fig. 16;
  • Fig. 22 is a perspective view of the switching element in the electric hammer shown in Fig. 21;
  • FIG. 23 is a perspective view of the switching element shown in FIG. 21 from another perspective.
  • the electric hammer 100 shown in FIG. 1 can drive the functional element 61 to rotate, and the functional element 61 can be a drill bit, so that the electric hammer 100 can drive the functional element 61 to rotate on the wall, concrete, brick, stone, etc. Punch holes in hard materials.
  • FIG. 1 upper, lower, front, rear, left and right as shown in FIG. 1 are defined.
  • the electric hammer 100 includes: a main engine 100a and an energy source.
  • the main engine 100a includes: a casing 10 , a power assembly 20 , a transmission assembly 30 , an impact assembly 40 , an output assembly 50 , a clamping assembly 60 and an energy source source, in this embodiment, the energy source may specifically be the battery pack 110 .
  • the casing 10 is formed with an accommodating space 11, and the accommodating space 11 is configured to accommodate various components inside the electric hammer 100. That is, the power assembly 20 , the output assembly 50 , the transmission assembly 30 and the impact assembly 40 are at least partially disposed in the accommodating space 11 .
  • the casing 10 forms or is connected with a handle portion 12 that can be held by a user. The user can operate the hammer 100 by holding the handle portion 12 .
  • the power assembly 20 is used to provide power to the electric hammer 100 .
  • the power assembly 20 includes a motor 21 , and the motor 21 includes a motor shaft 22 that can rotate around the motor axis 101 .
  • Transmission assembly 30 is configured to transmit power output from motor shaft 22 to output assembly 50 and impact assembly 40 .
  • the output assembly 50 includes a sleeve 51 that can be driven by the transmission assembly 30 to rotate about the first axis 102 .
  • the sleeve 51 is formed with an accommodating cavity configured to accommodate the functional element 61, and the functional element 61 can be inserted into the accommodating cavity.
  • the clamping assembly 60 can hold the functional element 61 on the sleeve 51 .
  • the sleeve 51 is rotated about the first axis 102, the functional element 61 can be driven to rotate.
  • the impact assembly 40 includes a swing rod bearing 40 a and an impact block 44 , the swing rod bearing can be driven by the transmission assembly 30 to impact the impact block 44 , and the impact block 44 can be in contact with the functional element 61 installed in the sleeve 51 . In this way, when the swing rod bearing 40a reciprocates against the impact block 44, the impact block 44 can intermittently output impact force to the functional element 61, so that the functional element 61 can be punched more efficiently.
  • the energy source is used to provide the electric hammer 100 with an energy source, and the energy source may be alternating current or direct current.
  • direct current is used, that is, the energy source is specifically the battery pack 110 , and the battery pack 110 and the casing 10 may be
  • the plug-in arrangement may also be a separate arrangement, that is, the battery pack 110 is not directly installed on the surface of the casing 10 , and the specific installation method is not limited here, as long as a power source can be provided.
  • the hammer 100 also includes a clutch assembly 80 .
  • the clutch assembly 80 is configured to open or close the transmission of power between the transmission assembly 30 and the impact assembly 40 .
  • the clutch assembly 80 has a first state and a second state. When the clutch assembly 80 is in the first state, the clutch assembly 80 can transmit the power output from the transmission assembly to the impact component 40 , and at this time, the impact component 40 can output impact force to the functional element 61 .
  • the clutch assembly 80 is in the first state (as shown in FIG. 6 )
  • the functional element 61 is not only driven by the output assembly 50 to rotate around the first axis 102 , but also receives the driving force output by the impact assembly 40 .
  • the electric hammer 100 is in hammer-drill mode at the moment.
  • the clutch assembly 80 When the clutch assembly 80 is in the second state (as shown in FIG. 2 ), the clutch assembly 80 disconnects the power transmission between the transmission assembly 30 and the impact assembly 40 , and the transmission assembly 30 no longer drives the impact assembly 40 . At this time, the impact assembly 40 cannot output impact force to the functional element 61 . Therefore, when the clutch assembly 80 is in the second state, the functional element 61 cannot be driven by the impact assembly 40, but can only be driven by the output assembly 50 to rotate around the first axis 102, and then the electric hammer 100 is in the drilling mode.
  • the hammer 100 also includes a switch assembly 70 .
  • the switch assembly 70 is arranged to switch the hammer 100 between a drill mode and a hammer drill mode.
  • the switching assembly 70 can transmit the driving force from the output assembly 50 to the clutch assembly 80, so that the clutch assembly 80 is switched to the first state.
  • the sleeve 51 is moved in the direction of the first axis 102 by pressing the functional element 61, so that the switching assembly 70 drives the clutch assembly 80 to switch to the first state , so that the electric hammer 100 switches to the hammer-drilling mode. That is to say, the user can switch the electric hammer 100 to the hammer-drilling mode without needing too many operation steps, which is convenient for the user to use, saves time, and improves work efficiency.
  • the transmission assembly 30 includes a mounting shaft 31 , a first transmission member 32 and a second transmission member 23 .
  • the second transmission member 23 forms a fixed connection with the motor shaft 22
  • the first transmission member 32 engages with the second transmission member 23 to receive the power output by the motor 21 .
  • the installation shaft 31 is fixedly connected with the first transmission member 32 , that is, when the first transmission member 32 rotates, the installation shaft 31 rotates accordingly.
  • the motor 21 can output power to the installation shaft 31 through the first transmission member 32 and the second transmission member 23 to drive the installation shaft 31 to rotate around the second axis 103 , the second axis 103 and the first axis 102 being parallel to each other.
  • the first transmission member 32 is a bevel gear
  • the second transmission member 23 is a bevel gear portion formed by the motor shaft 22 itself to mesh with the bevel gear.
  • the first transmission member 32 and the second transmission member 23 may also have other structures, and the specific structures thereof are not limited here, as long as the transmission of force can be achieved.
  • the output assembly 50 further includes: a first transmission part 52 , and a second transmission part 311 is formed on the installation shaft 31 .
  • the first transmission part 52 is fixedly installed to the sleeve 51
  • the second transmission part 311 is fixedly installed to the installation shaft 31 to rotate synchronously with the installation shaft 31 .
  • Both the first transmission part 52 and the second transmission part 311 are transmission teeth, and the first transmission part 52 meshes with the second transmission part 311 .
  • the motor drives the installation shaft 31 for transmission
  • the second transmission part 311 on the installation shaft 31 drives the first transmission part 52 and the sleeve 51 to rotate as a whole, and then the sleeve 51 drives the functional element 61 to rotate.
  • the swing rod bearing 40 a in the impact assembly 40 includes a striking piece 41 , a swing rod 42 and a bearing core 43 .
  • the striking piece 41 can reciprocate in the sleeve 51 to impact the impact block 44 , and then the impact block 44 impacts the functional element 61 .
  • the striking piece 41 is connected to the swing rod 42 , and the swing rod 42 is mounted to the bearing core 43 , and the bearing core 43 is arranged to mount the swing rod bearing 40 a to the mounting shaft 31 .
  • the bearing core 43 can rotate with the mounting shaft 31 , and the bearing core 43 can also not rotate with the mounting shaft 31 .
  • the bearing core 43 drives the swing rod 42 to reciprocate, and the swing rod 42 drives the striking piece 41 to reciprocate in the sleeve 51 to strike the impact block 44, so that the impact block 44 can An impact force is output to the functional element 61.
  • the functional element 61 is also impacted by the impact block 44 while rotating, so that the electric hammer 100 is in the hammer-drilling mode.
  • the bearing core 43 does not rotate with the installation shaft 31
  • the striking piece 41 cannot impact the impact block 44, and the impact block 44 will not output impact force to the functional element 61.
  • the functional element 61 only rotates, and the electric hammer 100 is in drill mode.
  • the clutch assembly 80 When the clutch assembly 80 is in the first state, the clutch assembly 80 can drive the bearing core 43 to rotate along with the mounting shaft 31, so that the striking piece can reciprocate in the sleeve 51 to drive the impact block 44 to output impact force to the functional element 61, Furthermore, at this time, the electric hammer 100 is in the hammer-drilling mode.
  • the clutch assembly 80 When the clutch assembly 80 is in the second state, the clutch assembly 80 no longer drives the bearing core 43 to rotate with the installation shaft 31, the installation shaft 31 can rotate relative to the impact assembly 40, the installation shaft 31 drives the output assembly 50 to rotate, and then drives the functional element 61 to rotate, At this time, the functional element 61 only performs a rotary motion, that is, the electric hammer 100 is in the drilling mode.
  • the clutch assembly 80 includes: an input part 81 and an output part 82 .
  • the input part 81 and the mounting shaft 31 rotate synchronously, and the output part 82 rotates synchronously with the bearing core 43 of the pendulum bearing 40a.
  • the output part 82 can move relative to the input part 81 , so that the input part 81 can form cooperation with the output part 82 , and the input part 81 can also disengage from the cooperation with the output part 82 .
  • the output part 82 moves relative to the input part 81 to a position where it cooperates with the input part 81 .
  • the output part 82 moves relative to the input part 81 to a position where it is disengaged from the input part 81, at this time, the clutch assembly 80 cannot drive the swing rod bearing 40a, and the swing rod bearing 40a cannot drive the impact block at this time 44.
  • the switch assembly 70 includes a switch element 71 , and the switch element 71 includes a force receiving end 711 and a driving end 712 .
  • the force receiving end 711 is in contact with the output assembly 50 and can be driven by the output assembly 50 to move along the first axis 102
  • the driving end 712 is in contact with the clutch assembly 80 to drive the clutch assembly 80 to switch between the first state and the second state.
  • the output assembly 50 moves relative to the casing 10 along the first axis 102
  • the output assembly 50 drives the force end 711 to move
  • the force end 711 drives the drive end 712 to move together to drive the clutch assembly 80 to switch from the second state to the first state condition.
  • the switching element 71 is arranged on the lower side of the first axis 102 .
  • This arrangement can make the overall size of the electric hammer 100 more reasonable.
  • the force end 711 of the switching element 71 is directly connected to the output assembly 50 , and the driving end 712 of the switching element 71 directly drives the clutch assembly 80 .
  • only one set on the lower side of the first axis 102 of the sleeve 51 is needed.
  • the switching element 71 can switch the state of the clutch assembly 80, which is not only simple in structure, but also makes full use of the space on the lower side of the first axis 102, so that the whole machine has a compact structure and a more reasonable arrangement.
  • the size of the sleeve 51 along the first axis 102 is relatively large, so that the sleeve 51 needs to occupy a relatively large space in the direction of the first axis 102, and the The switching element 71 is arranged on the lower side of the first axis 102 , so that the space on the lower side of the sleeve 51 can be fully utilized.
  • This arrangement can avoid that when the switching element 71 is arranged on the left or right side of the sleeve 51, the size of the whole formed by the sleeve 51 and the switching element 71 in the left-right direction is relatively large, thereby preventing the casing 10 from being left and right.
  • the size in the direction is too large, so that the electric hammer 100 can be easily attached to the left wall and the right wall to make holes.
  • this arrangement also avoids that the upper surface of the casing 10 is far away from the first axis when the switching element 71 is arranged on the upper side of the first axis 102 , so that the electric hammer 100 can be easily attached to the upper wall for punching .
  • a switching element 71 is provided on the lower side of the first axis, and through the force-receiving end and the driving end of the switching element 71, when the output assembly 50 moves backward along the first axis, the clutch assembly 80 can be switched to the first state to realize the electrical
  • the hammer is switched from the drill mode to the hammer drill mode, which not only simplifies the structure of the electric hammer mode switching, but also reduces the axial size of the whole machine.
  • the orthographic projection of the switching element 71 in a plane perpendicular to the first axis 102 at least partially overlaps the orthographic projection of the first transmission 52 in a plane perpendicular to the first axis 102 . That is, the orthographic projection of the first transmission part 52 in a plane perpendicular to the first axis 102 has the highest point and the lowest point, and the orthographic projection of the switching element 71 in the plane is located between the highest point and the lowest point.
  • the force receiving end 711 of the switching element 71 is in contact with the first transmission part 52 , and the driving end 712 of the switching element 71 is connected to the clutch assembly 80 , that is, when the sleeve 51 is forced to move along the first axis 102 ,
  • the first transmission part 52 moves along the first axis 102 together with the sleeve 51, so that the force-bearing end 711 abutting on the first transmission part 52 is forced to slide along the first axis 102, so that the driving end 712 drives the clutch
  • the assembly 80 is switched to the first state, whereby the hammer 100 is now in the hammer-drilling mode.
  • the switching element 71 makes full use of the space on the lower side of the sleeve 51, so that the structure and position of the installation shaft 31 or other components can be well planned, thereby making the overall machine layout more reasonable.
  • the size of the switching element 71 in the up-down direction is smaller than the size of the first transmission part 52 in the up-down direction, that is, the size of the switching element 71 in the up-down direction is smaller than the diameter of the first transmission part 52, And the switching element 71 is located on the lower side of the sleeve 51.
  • the switching element 71 is arranged between the first axis 102 and the second axis 103, and the first transmission part 52 is engaged with the installation shaft 31, so the first There is a certain height difference in the vertical direction at the engagement between the transmission part 52 and the installation shaft 31.
  • the height difference can be fully utilized, that is to say, the switching element 71 can make full use of the lower side of the sleeve 51 and the upper side of the installation shaft 31. Therefore, the mode switching can be realized by the switching element 71 without adjusting the structural arrangement.
  • the force-receiving end 711 of the switching element 71 can also be in contact with the driving part formed on the sleeve 51 , so that the switching function can also be realized. 52 is basically the same, so it will not be repeated here.
  • the sleeve 51 is substantially symmetrical about a vertical plane P, wherein the vertical plane is a plane along the up-down direction, the first axis 102 is located in the plane P, and the switching element 71 is located between the first axis 102 and the second axis 103. Parts are distributed on both sides of the plane P.
  • the switching element 71 adopts some wear-resistant materials to ensure the operation of the machine, such as high-density steel, etc. The weight of these materials will be heavier. The weight of the switching element 71 is distributed as far as possible on both sides of the plane P, which can ensure the balance of the whole machine.
  • the electric hammer 100 further includes a shift assembly 90 that can be adjusted by the user.
  • the shifting assembly 90 includes a limiting portion 91 configured to prevent the sleeve 51 or the switching element 71 from retreating in the direction of the first axis 102 .
  • the user can adjust the shift assembly 90 so that the stopper 91 moves to the release position and the limit position.
  • the stop 91 When the shift assembly 90 is in the release position, the stop 91 allows the sleeve 51 and the shift element 71 to move along the first axis 102, and when the shift assembly is in the restraint position, the stop 91 prevents the sleeve 51 and the shift element 71 Move in the direction of the first axis 102 .
  • the switching element 71 is fixedly connected or integrally formed with a stopper portion 714 configured to cooperate with the limiting portion 91 .
  • the limiting portion 91 When the user adjusts the shift assembly 90 to move the limiting portion 91 to the limiting position, the limiting portion 91 abuts against the stop portion 714 , and the limiting portion 91 prevents the switching element 71 from moving in a direction parallel to the first axis 102 , that is, At this time, the switching element 71 cannot drive the output part 82 to combine with the input part 81, so that the electric hammer 100 is in the drilling mode.
  • the limiting portion 91 When the user adjusts the shift assembly 90 to move the limiting portion 91 to the release position, the limiting portion 91 is disengaged from the stopping portion 714 , and at this time, the limiting portion 91 allows the sleeve 51 and the stopping element to move in the direction of the first axis 102 .
  • the switching element 71 moves in a direction parallel to the first axis 102 when receiving the driving force from the sleeve 51, so that the switching element 71 can drive the output part 82 to combine with the input part 81 at this time, Further, the electric hammer 100 is put into the hammer-drilling mode.
  • the clutch assembly 80 in the direction along the second axis 103, is disposed on the rear side of the rocker bearing 40a.
  • the input portion 81 of the clutch assembly 80 is fixedly connected or integrally formed with the first transmission member 32
  • the output portion 82 is fixedly connected or integrally formed with the bearing core 43 .
  • the input portion 81 is a first meshing tooth formed on the first transmission member 32 and extending toward the bearing core 43
  • the output portion 82 is a second meshing tooth formed on the bearing core 43 of the pendulum bearing 40a and toward the first transmission member 32 . tooth.
  • the clutch assembly 80 When the input part 81 and the output part 82 are disengaged, the clutch assembly 80 is in the second state.
  • the switching element 71 is in contact with the bearing core 43 of the rocker bearing 40a.
  • the switching element 71 receives the driving force of the sleeve 51 , the switching element 71 drives the bearing core 43 to move toward the first transmission member 32 along the second axis 103 .
  • the output part 82 on the bearing core 43 moves to the same distance as the first transmission Therefore, the clutch assembly 80 is switched to the first state, and the electric hammer 100 enters the hammer-drilling mode.
  • the clutch assembly 80 further includes a reset member 83, the reset member 83 is biased and provided between the swing rod bearing 40a and the first transmission member 32, and the reset member 83 is provided as a biased output member so that the clutch assembly 80 has the ability to switch toward the second state. the trend of. In this way, when the switching element 71 does not receive the driving force of the sleeve 51, the reset member 83 drives the swing rod bearing 40a to move to the output part 82 along the second axis 103 and is separated from the input part 81. At this time, the clutch assembly 80 is in the first state. In the second state, the electric hammer 100 is in the drilling mode.
  • the input portion 81 is formed by an end surface of the first transmission member 32 which is recessed inward.
  • the end surface of the first transmission member 32 is recessed inward to form a groove, and the groove wall of the groove protrudes toward the second axis 103 to form protruding teeth to form the output portion 82 .
  • the size of the whole formed by the output portion 82 and the first transmission member 32 is reduced, which is beneficial to reduce the size of the transmission assembly 30 along the direction of the second axis 103 .
  • the output portion 82 when the output portion 82 is engaged with the input portion, the output portion 82 is inserted into the groove, which can increase the travel of the output portion 82, thereby improving the reliability of the clutch assembly 80, and having a suitable space for placing the reset piece 83, the size of the transmission assembly 30 along the direction of the second axis 103 can be further reduced, which is beneficial to reduce the length of the electric hammer 100 in the front-rear direction.
  • the output portion 82 extends rearward from the end face of the bearing core 43 , which extends rearward to form an annular portion, the end face of which is provided with teeth to form the output portion 82 .
  • the reset member 83 is arranged between the output portion 82 and the input portion 81 , and the reset member 83 is specifically a spring, and the spring is at least partially arranged in the annular portion.
  • the spring disengages the joint portion of the drive bearing core 43 from the input portion 81 according to its own elastic force, and the impact assembly 40 rotates relative to the mounting shaft 31 at this time, so that the impact assembly 40 is switched to second state.
  • the position of the connection between the bearing core 43 and the first transmission member 32 is located inside the first transmission member 32, so as to utilize the first transmission member 32.
  • the inner space of a transmission member 32 can save the size of the whole machine in the left and right directions under the condition that the structure is stable.
  • the input portion 81 is configured to be convex outwardly from the first transmission member 32 in a tooth shape
  • the output portion 82 is configured to be recessed rearward in a tooth shape.
  • the bearing core 43 is mounted on the mounting shaft 31 , the bearing core 43 can move along the second axis 103 , and a accommodating cavity 431 for accommodating lubricating oil is provided in the bearing core 43 .
  • the accommodating cavity 431 is provided with lubricating oil, so that the frictional force of the bearing core 43 rotating or sliding relative to the mounting shaft 31 can be reduced. Due to the relative rotation between the bearing core 43 and the mounting shaft 31 , a gap exists between the mounting shaft 31 and the bearing core 43 . When the electric hammer 100 is at rest, the bearing core 43 will have two contact surfaces with the installation shaft 31 under the influence of gravity. Cavity 431.
  • the accommodating cavity 431 has a first length A
  • the first contact surface 432 has a second length B
  • the second contact surface 433 has a third length C, wherein the first length A is greater than the second length B
  • the sum of the third length C through the above setting, the space of the accommodating cavity 431 is made larger, so that more lubricating oil can be accommodated in the accommodating cavity 431, the friction force is reduced, and the electric hammer 100 is prevented from appearing when the electric hammer 100 is in the drilling mode. In the event of a shock, damage to the machine is avoided, while also extending the life of the shock assembly 40.
  • the value range of the first length A is greater than or equal to 8mm and less than or equal to 20mm
  • the value range of the second length B is greater than or equal to 0.5mm and less than or equal to 4mm
  • the value range of the third length C is greater than or equal to 0.5mm and less than or equal to 4mm. Setting within the above range can not only ensure that the accommodating cavity 431 has enough accommodating space, but also prevent the bearing core 43 from being too long in the longitudinal direction, thereby extending the size of the whole machine.
  • the swing rod 42 includes a ring 421 sleeved on the bearing core 43 and a connecting rod 422 integrally formed with the ring 421 .
  • the swing rod bearing 40a further includes a movable sleeve 411 mounted on one end of the connecting rod 422 , the striking piece is arranged in the movable sleeve 411 , and the movable sleeve 411 can drive the striking piece to strike the impact block 44 .
  • the connecting rod 422 extends along the direction of the first straight line 104 , and the movable sleeve 411 and the ring 421 are arranged on both ends of the connecting rod 422 .
  • the swing rod 42 can move to the first limit position and the second limit position, and the connecting rod 422 can move to the first limit position and the second limit position.
  • the connecting rod 422 is inclined forward to the first limit angle. That is to say, when the connecting rod 422 is at the first limit angle, the movable sleeve 411 moves forward to the farthest distance it can move.
  • the first straight line 104 is parallel to the motor axis 101, wherein the first straight line 104 is parallel to the motor axis 101.
  • the distance between the motor axes 101 is greater than or equal to 0 mm and less than or equal to 20 mm.
  • the first straight line 104 and the motor axis 101 may not be parallel, but this arrangement will cause the movable sleeve 411 to move forward, thereby extending the size of the sleeve 51 in the front-rear direction, thereby lengthening the size of the whole machine. Or if the first straight line 104 is not parallel to the motor axis 101, the position of the bearing core 43 will be farther back than the parallel position, so it is necessary to extend the size of the installation shaft 31 in the front-rear direction, thereby lengthening the length of the whole machine. size of the direction.
  • the size of the whole machine in the front-rear direction can be in the range of In a relatively reasonable range, in one embodiment, the distance between the first straight line 104 and the motor axis 101 is greater than or equal to 10 mm and less than or equal to 20 mm, and the above-mentioned settings have better effects.
  • the connecting rod when the swing rod is at the first limit position, the connecting rod is at the first limit angle, the first straight line intersects the motor axis to form an included angle greater than or equal to 0 degrees and less than or equal to 5 degrees, and the The intersection of a straight line and the axis of the motor is on the motor, so that the size of the whole composed of the rocker bearing 40a and the movable sleeve 411 along the direction of the first axis 102 can be reduced as much as possible.
  • the connecting rod 422 When the swinging rod 42 is at the second extreme position, the connecting rod 422 is inclined backward to the second extreme angle, that is to say, when the connecting rod 422 is at the second extreme angle, the movable sleeve 411 moves backward to the most movable position. For a long distance, the first straight line 104 intersects the first axis 102 at this time.
  • the ratio of the weight of the impact assembly 40 to the output power of the motor 21 is greater than or equal to 0.09 g/W and less than or equal to 0.16 g/W. In some other embodiments, the ratio of the weight of the impact assembly 40 to the output power of the motor 21 is greater than or equal to 0.06 g/W and less than or equal to 0.12 g/W. While reducing the weight of the impact assembly 40, when the motor 21 can output a sufficiently large output power, the performance can be ensured and the weight of the whole machine can be reduced.
  • the electric hammer 100 further includes a support bracket 13 configured to support the installation shaft 31 .
  • the support bracket 13 is fixedly connected or integrally formed with the casing 10.
  • the support bracket 13 divides the casing 10 into a first space 15 and a second space 16.
  • the bearing core 43 is located in the second space 16, that is, in the front-rear direction, the first space
  • the space 15 is located on the front side of the second space 16 .
  • the support bracket 13 is sleeved on the sleeve 51 and configured to position the sleeve 51 , and the installation shaft 31 passes through the support bracket 13 to ensure a constant distance between the sleeve 51 and the installation shaft 31 .
  • the sleeve 51 and the installation shaft 31 are rotatable relative to the support bracket 13 , and the installation shaft 31 is disposed below the sleeve 51 in the up-down direction.
  • the support bracket 13 is provided on the front side of the clutch assembly 80 in the front-rear direction.
  • the electric hammer 100 further includes a positioning assembly configured to position the mounting shaft 31 , the positioning assembly includes a first bearing 17 and a second bearing 18 , which are respectively disposed at the clutch Both sides of assembly 80.
  • the first bearing 17 is mounted to the mounting shaft 31 and is located on the front side of the clutch assembly 80 , and the first bearing 17 is provided in the support bracket 13 .
  • a mounting hole for mounting the first bearing 17 is formed on the support bracket 13 .
  • the second bearing 18 is mounted to the mounting shaft 31 and is located on the rear side of the clutch assembly 80 , and the second bearing 18 is provided in the casing 10 .
  • the product of the distance between the first bearing 17 and the second bearing 18 and the weight of the main body 100a is greater than or equal to 27 mm ⁇ kg and less than or equal to 58 mm ⁇ kg. In one embodiment, the product of the distance between the first bearing 17 and the second bearing 18 and the weight of the host 100a is greater than or equal to 40 mm ⁇ kg and less than or equal to 58 mm ⁇ kg.
  • the size of the main body 100 a in the front-rear direction is reduced, which is beneficial to the miniaturization of the electric hammer 100 .
  • the weight of the main engine 100 a is also greatly reduced, thereby obtaining a small-sized and light-weight electric hammer 100 .
  • the output power of the motor 21 is greater than or equal to 360W and less than or equal to 440W, so that the electric hammer 100 can be ensured to have higher power on the premise of small size and light weight.
  • the second transmission portion is provided on the front side of the first bearing, and the first transmission portion is provided on the front side of the first bearing.
  • the distance D between the first bearing 17 and the second bearing 18 along the second axis 103 is greater than or equal to 30 mm and less than or equal to 50 mm. In some other embodiments, the first bearing 17 and the second bearing 18 The distance D in the direction along the second axis 103 is greater than or equal to 40 mm and less than or equal to 46 mm, so that the distance between the first bearing 17 and the second bearing 18 is set within a suitable range, that is, the first bearing There is enough space between the first bearing 17 and the second bearing 18 to set the impact assembly 40, the switching assembly 70 and the clutch assembly 80, and at the same time, it can prevent the distance between the first bearing 17 and the second bearing 18 from being too large, which will cause the length of the whole machine to be too large. long case.
  • the ratio of the weight of the host 100a to the output power of the motor 21 is greater than or equal to 2.2g/W and less than or equal to 4.5g/W. In some other embodiments, the weight of the host 100a and the output power of the motor 21 The ratio is greater than or equal to 3g/W and less than or equal to 4g/W, which greatly reduces the weight of the host 100a under the condition that the maximum output power of the motor 141 meets the working requirements, which further facilitates user operation.
  • At least one guide groove 131 for guiding the movement of the switching element 71 is formed on the support bracket 13 .
  • the switching element 71 partially passes through the guide groove 131 and can reciprocate along the guide groove 131 .
  • the force receiving end 711 can transmit the driving force from the output assembly 50 , and the driving end 712 will The driving force is transmitted to the clutch assembly 80, so that the clutch assembly 80 is switched to the first state.
  • the support bracket 13 may also be formed with two guide grooves 131 respectively disposed on both sides of the plane P.
  • the switching element 71 is formed with two protruding parts 713 arranged at intervals corresponding to the guide grooves 131 , and each protruding part 713 is formed with a corresponding force-bearing end 711 .
  • the switching element 71 receives a force It can slide along the guide groove 131 , that is, the switching element 71 can apply a driving force to the clutch assembly 80 during the movement, so that the electric hammer 100 can be switched from the drilling mode to the hammer drilling mode.
  • the guide groove 131 is arranged on the outer edge of the support bracket 13, so as to facilitate the processing of the components and simplify the processing technology of the components.
  • the guide groove 131 is parallel to the first axis 102 , so that the length of the switching element 71 in the direction along the first axis 102 is minimized under the condition that the function conversion can be ensured.
  • the switching element 71 may not use a sliding method, for example, a spring or the like may also be used, and the driving of the clutch assembly 80 may be realized by using the characteristics of the spring itself.
  • vent hole is formed on the support bracket 13 that can penetrate the first space 15 and the second space 16.
  • the vent hole can be replaced by a guide groove, that is to say, in this embodiment, the guide groove 131 can not only It is used to guide the movement of the switching element 71, and can also be used to exhaust and inhale, so as to ensure the normal operation of the machine.
  • the first transmission part 52 is fixedly connected to the sleeve 51 , and the force-receiving end 711 of the switching element 71 abuts on the first transmission part 52 .
  • a positioning member 53 is fixedly connected to the sleeve 51 .
  • the positioning member 53 is configured to restrict the backward movement of the first transmission portion 52 on the sleeve 51 .
  • a positioning groove 54 is formed on the sleeve 51 , and the positioning groove 54 is configured to install the positioning member 53 , the positioning groove 54 is radially recessed inward along the outer periphery of the sleeve 51 , so as to install and fix the positioning member 53 .
  • the first transmission part 52 includes a middle part 521 and a rotating part 522 , the intermediate part 521 is arranged to contact the switching element 71 , and the rotating part 522 is arranged to contact the second transmission part to receive the power output from the transmission assembly 30 .
  • An accommodating space 5221 is formed on the rotating member 522 .
  • the accommodating space 5221 is recessed inward from the rotating member 522 , and the intermediate member 521 is at least partially accommodated in the accommodating space 5221 .
  • the switching element 71 abuts on the middle piece 521
  • the positioning piece 53 is a retaining spring
  • the middle piece 521 is specifically a washer
  • the rotating piece 522 is a gear.
  • the circlip and the gears run relatively, which will wear the gears and affect the life of the gears.
  • the switching elements 71 will wear the gears, thereby affecting the life of the gears.
  • the switching element 71 can be prevented from directly wearing the gear, thereby prolonging the life of the gear. It is also possible to directly install the washer on the rear end of the gear, but this will increase the size of the gear and the washer on the axis, thereby extending the size of the sleeve 51 on the axis.
  • the accommodating space 5221 is specifically provided on the rear end face of the gear, and is formed by the rear end face of the gear being recessed forward, and the diameter of the accommodating space 5221 is smaller than the diameter of the root circle of the gear. In this way, under the condition that the accommodating space 5221 has sufficient space to accommodate the gasket, the effective tooth width of the gear can be not affected, and the stability of the connection between the gear and the installation shaft 31 can be ensured.
  • the sleeve 51 has a length L1 along the first axis 102
  • the host 100 a has a length L2 along the first axis 102
  • the casing 10 has a length L2 along the direction perpendicular to the first axis 102 .
  • the length and width of the main engine 100a can be reduced, and at the same time, the sleeve 51 can have enough space to enable the striking element to The reciprocating motion can ensure the smooth operation of the whole machine.
  • This setting can make the impact assembly 41 have a sufficient movable stroke, and at the same time, the length of the sleeve 51 in the direction of the first axis 102 can be within a reasonable range, so that the whole The machine has a compact structure, which avoids the situation that the length of the whole machine in the direction of the first axis 102 is too long, thereby facilitating the user's operation.
  • the value range of the length L1 is greater than or equal to 80 mm and less than or equal to 101 mm. It should be noted that the length L3 refers to the width of the casing 10 surrounding the sleeve 51 .
  • the electric hammer 100 further includes a locking assembly for locking the impact assembly 40 , and the locking assembly includes the locking element 14 .
  • the locking element 14 releases movement of the impact assembly 40 .
  • the clutch assembly 80 is in the second state, the locking element 14 prevents movement of the impact assembly 40 .
  • the swing rod bearing 40a is in the first position, the bearing core 43 rotates synchronously with the installation shaft 31, that is, the electric hammer 100 is in the hammer-drilling mode at this time.
  • the bearing core 43 can rotate relative to the installation shaft 31, that is, the electric hammer 100 is in the drilling mode at this time. model.
  • lubricating oil is often added to the bearing core 43, but this arrangement will cause the gap between the mounting shaft 31 and the bearing core 43 due to The presence of lubricating oil generates frictional force, that is to say, when the electric hammer 100 is in the drilling mode, due to the existence of frictional force, when the installation shaft 31 rotates, the pendulum bearing 40a is driven to move, thereby causing the electric hammer 100 to move.
  • the striking piece reciprocates in the sleeve 51 to strike the impact block 44, and the impact block 44 outputs impact force to the functional element, which is easy to damage the workpiece and affect the work progress.
  • the locking element 14 configured to prevent the impact assembly 40 from striking the impact block 44, the above situation can be avoided, thereby ensuring the progress of the machine operation and improving the user's experience. At the same time, the failure rate of the machine is also reduced.
  • the locking element 14 When the swing rod bearing 40a is in the first position, the locking element 14 is separated from the bearing core 43, and the bearing core 43 can rotate synchronously with the mounting shaft 31. When the swing rod bearing 40a is in the second position, the locking element 14 and the bearing The core 43 is engaged, that is, the mounting shaft 31 can rotate relative to the bearing core 43 .
  • the locking element 14 is fixedly connected or integrally formed with the casing 10 , the locking element 14 includes a locking portion 141 , and the bearing core 43 is provided with a latching portion 434 that cooperates with the locking portion 141 .
  • the bearing core 43 protrudes forward to form the engaging portion 434 so as to cooperate with the locking portion 141 .
  • the bearing core 43 may also be recessed inward to form the engaging portion 434 .
  • the reset member 83 drives the bearing core 43 to disengage from the first transmission member 32 , and the bearing core 43 moves along the second axis 103 to the position where the engaging portion 434 and the locking portion 141 cooperate.
  • the engaging portion 434 is disposed on the front side of the bearing core 43
  • the locking portion 141 is disposed at any position in the circumferential direction of the engaging portion 434 .
  • the locking portion 141 may be a pin, a fork, etc. that are fixedly connected to the casing 10.
  • the locking portion 141 is formed by a rib extending from the casing 10, and the locking portion 41 is made of wear-resistant material. made of material.
  • the bearing core 43 is allowed to rotate with the mounting shaft 31 when the swing rod bearing 40a is in the first position, and the rotation of the bearing core 43 is restricted when the swing rod bearing 40a is in the second position.
  • 16 to 23 are schematic diagrams showing the internal structure of the electric hammer in the second embodiment.
  • the motor, output assembly, support bracket, functional accessories, etc. are basically the same as those in the first embodiment, and the difference lies in the specific structures of the switching assembly, the transmission assembly and the locking assembly. That is to say, the parts of the first embodiment that are compatible with this embodiment can be applied to this embodiment, and only the differences between this embodiment and the first embodiment will be described below.
  • the electric hammer 200 includes a clutch assembly 270 for switching the electric hammer 200 between a drilling mode and a hammer drilling mode.
  • the impact assembly includes: a swing rod bearing 240, the swing rod bearing 240 includes a first operating state (as shown in FIG. 18 ) and a second operating state (as shown in FIG. 19 ).
  • the bearing core 241 of the pendulum bearing 240 rotates with the installation shaft 231, and the electric hammer 200 is in the hammer-drilling mode at this time.
  • the pendulum rod bearing 240 is in the second operating state, the bearing core 241 of the pendulum rod bearing 240 rotates relative to the mounting shaft 231, and the electric hammer 200 is in the drilling mode at this time.
  • the clutch assembly 270 includes a clutch member 271 and an elastic member 272, wherein the elastic member 272 can apply an elastic force close to the swing rod bearing 240 to the clutch member 271, so that the swing rod bearing 240 enters the first operating state, that is, the electric hammer 200 enters the Hammer drill pattern.
  • the clutch member 271 is driven to overcome the elastic force and move in a direction away from the pendulum bearing 240, the pendulum bearing 240 enters the second operating state, that is, the electric hammer 200 enters the drilling mode. That is to say, only by using the clutch member 271 and the elastic member 272, the function mode switching can be realized, which greatly saves parts, not only reduces the volume and the size of the whole machine, but also simplifies the structure and facilitates processing. Further, the above setting can also reduce the weight of the whole machine, which is convenient for the user to operate the machine.
  • the electric hammer 200 further includes a shift assembly 290 .
  • the shift assembly 290 includes a shift element 291 configured to drive the clutch element 271 , and the shift element 291 is operated by the user. The user can switch between the drilling mode and the hammer drilling mode of the electric hammer 200 by driving the shift member 291 .
  • the clutch member 271 rotates synchronously with the bearing core 241 of the rocker bearing 240 .
  • An engaging portion 2712 is formed on the clutch member 271
  • a connecting portion 2311 is formed on the mounting shaft 231 to fit with the engaging portion 712 on the clutch member 271 .
  • the clutch member 271 is in the first switching state (as shown in FIG. 18 ) that enables the bearing core 241 of the swing rod bearing 240 to rotate with the mounting shaft 231 , and the impact assembly can output impact at this time force, the hammer 200 is in hammer drill mode.
  • the clutch member 271 is in the second switching state (as shown in FIGS. 19 and 20 ) in which the power transmission between the mounting shaft 231 and the bearing core 241 is disconnected, and the impact assembly cannot be output at this time. Impact force, the hammer 200 is in drill mode.
  • the clutch member 271 is sleeved on the installation shaft 231 , and the clutch member 271 can slide on the installation shaft 231 along the direction of the second axis 203 .
  • the clutch member 271 can rotate relative to the installation shaft 231 , and the inner wall of the clutch member 271 forms an engaging portion 2712 .
  • the connecting portion 2311 is the first driving tooth that is fixedly connected or integrally formed on the mounting shaft 231 .
  • the shift member 291 when operated by the user, can drive the clutch member 271 to move along the second axis 203 to switch the rocker bearing 240 between the first operating state and the second operating state.
  • the shifting member 291 includes a driving portion 292, and the driving portion 292 can apply a driving force to the clutch member 271 to move the clutch member 271 away from the swing rod bearing 240, thereby making the swing rod bearing 240 enter the first operating state.
  • the clutch member 271 is provided with a force receiving portion 2711 that cooperates with the driving portion 292 .
  • the driving part 292 drives the force receiving part 2711 to move forward, so that the engaging part 2712 on the clutch part 271 is separated from the connecting part 2311 on the installation shaft 231, so that the installation shaft 231 can be relative to the bearing core 241 Movement.
  • a matching portion 2713 is formed on the clutch member 271
  • an extension portion 2411 is formed on the bearing core 241 to match with the matching portion 2713 on the clutch member 271 .
  • the engaging portion 2713 is disposed at the rear end of the engaging portion 2712 , and the engaging portion 2713 is specifically a second engaging tooth formed on the inner wall of the clutch member 271 .
  • the extension portion 2411 is a second driving tooth that is fixedly connected or integrally formed on the bearing core 241 . During the sliding process of the clutch member 271, the second meshing teeth and the second driving teeth are always kept meshed.
  • the elastic piece 272 is sleeved on the installation shaft 231 , the elastic piece 272 is at least partially disposed inside the clutch piece 271 , and in the direction along the second axis, the elastic piece 272 is arranged on the front side of the clutch piece 271 .
  • the front end of the elastic member 272 is connected with the first bearing 217 on the installation shaft 231
  • the rear end of the elastic member 272 is connected with the engaging portion 2712 on the clutch member 271 .
  • the hammer 200 further includes a locking assembly 214 configured to lock the swing rod bearing 240 , that is, when the hammer 200 is in the drilling mode, the locking assembly 214 blocks the bearing core 241 of the swing rod bearing 240 turn.
  • the locking assembly 214 allows the bearing core 241 of the pendulum bearing 240 to rotate when the hammer 200 is in the hammer drill mode.
  • the locking assembly 214 includes a locking element 215, the locking element 215 is connected with a deformable locking portion 216, and the clutch member 271 is connected with the locking portion 216 and is configured to prevent the clutch member 271 from rotating The snap-on part 2714.
  • An accommodating portion 211 is formed on the casing 210 , and the locking element 215 is at least partially disposed in the accommodating portion 211 .
  • the locking element 215 is made of flexible parts, such as a spring pin, an elastic column, etc.
  • the locking element 215 is a torsion spring, the torsion spring is installed in the accommodating part 211, and the end of the torsion spring extends upwards, which can be connected with the torsion spring.
  • the clutch member 271 is engaged.
  • the engaging portion 2714 is a blocking tooth formed on the clutch member 271 to protrude forward.
  • the torsion spring is engaged with the stopper teeth of the clutch member 271 , that is, the clutch member 271 cannot rotate at this time, so that the bearing core 241 cannot move.
  • the torsion spring is not in contact with the stopper teeth, that is, the bearing core 2411 can rotate with the rotation of the clutch member 271 at this time.
  • the deformation refers to that when the stopper teeth are engaged with the locking portion 216, the stopper teeth low-pressure the locking portion 216, that is, the stopper teeth exert a contact force on the locking portion 216, and the locking portion 216 receives the contact force. Therefore, the locking portion 216 generates a force that prevents the blocking teeth from rotating away from the locking portion 216, thereby ensuring the stability of the structure.
  • the host mentioned in this article refers to the bare metal without functional accessories, energy sources, and auxiliary handles.

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  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

一种电锤,具有钻模式和锤钻模式,包括:输出组件(50)、冲击组件(40)、离合组件(80)及切换组件(70);输出组件(50)包括套筒(51);冲击组件(40)包括摆杆轴承(40a)和冲击块(44);离合组件(80)具有能驱动摆杆轴承(40a)随安装轴(31)运动的第一状态和允许安装轴(31)相对摆杆轴承(40a)转动的第二状态;切换组件(70)设置为使离合组件(80)在第一状态和第二状态之间切换;切换组件(70)包括切换元件(71),切换元件(71)包括受力端(711)和驱动端(712),在输出组件(50)沿第一轴线运动时驱动受力端(711)运动,驱动端(712)设置为驱动离合组件(80)切换至第一状态;切换元件(71)设置在第一轴线的下侧。电锤结构简单,又能方便用户进行功能切换。

Description

电锤
本申请要求申请日为2020年9月25日、申请号为202011022734.1,申请日为2020年9月25日、申请号为202011021007.3,申请日为2020年9月25日、申请号为202022143093.7,申请日为2020年9月25日、申请号为202011021012.4,申请日为2020年9月25日、申请号为202022143274.X及申请日为2020年9月25日、申请号为202022151258.5的中国专利申请的优先权,上述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,例如涉及一种电锤。
背景技术
电锤是一种应用广泛的电动工具,主要用来在混凝土、楼板、砖墙和石材上钻孔,相关技术中存在很多电锤,在实现钻孔功能的同时,又能调节到适当的位置配上适当的钻头就可以代替普通电钻,也就是我们说的锤钻模式和钻模式。
但是这类电锤在实现功能转换的时候,需要通过很复杂的切换组件来实现锤钻模式与锤钻模式之间的切换,这样往往会使切换组件的结构十分复杂,进而使整机尺寸变大,从而造成用户不便操作。
发明内容
本申请提供了一种电锤,该电锤结构简单,又能方便用户进行功能切换。
一实施例提供了一种电锤,包括:机壳;电机,至少部分设置在机壳内;输出组件,包括能绕第一轴线转动的套筒;冲击组件,包括摆杆轴承和能被摆杆轴承驱动以在套筒内往复运动的冲击块,冲击块在套筒内运动时能向前输出冲击力;安装轴,设置为安装摆杆轴承,安装轴能被电机驱动绕第二轴线转动;电锤具有钻模式和锤钻模式;在电锤处于钻模式时,套筒转动;在电锤处于锤钻模式时,套筒转动,且冲击块在套筒内往复运动;电锤还包括:离合组件,具有能驱动摆杆轴承随安装轴运动的第一状态和允许安装轴相对摆杆轴承转动的第二状态;切换组件,设置为使离合组件在第一状态和第二状态之间切换;切 换组件包括切换元件,切换元件包括受力端和驱动端,在输出组件沿第一轴线运动时驱动受力端运动,驱动端设置为驱动离合组件切换至第一状态;其中,切换元件设置在第一轴线的下侧。
在一实施例中,切换元件设置在第一轴线和第二轴线之间。
在一实施例中,套筒关于一个竖直平面基本对称设置;切换元件位于第一轴线和第二轴线之间的部分分布在平面的两侧。
在一实施例中,电锤还包括:第一传动件,第一传动件设置为接收电机输出的动力以驱动安装轴转动;离合组件包括:输入部,与第一传动件或安装轴构成同步转动;输出部,在与输入部配合时驱动摆杆轴承运动;摆杆轴承能在安装轴上沿第二轴线滑动,输出部能随摆杆轴承一并沿第二轴线滑动,切换元件设置在摆杆轴承的前侧且能驱动摆杆轴承和输出部所构成的整体沿第二轴线滑动。
在一实施例中,摆杆轴承包括安装至安装轴的轴承芯,轴承芯朝向第一传动件延伸以形成输出部。
在一实施例中,输出组件还包括:第一传动部,与套筒固定连接;第二传动部,与安装轴构成同步转动,第二传动部驱动第一传动部转动;切换元件的受力端与第一传动部抵接。
在一实施例中,电锤还包括支撑支架,与机壳固定连接或者一体成型,支撑支架设置为支撑安装轴;支撑支架上形成或者固定连接有可供切换元件运动的导槽。
在一实施例中,切换元件设置在套筒和安装轴之间。
在一实施例中,输出组件还包括:第一传动部,与套筒固定连接;第二传动部,与安装轴构成同步转动,第二传动部驱动第一传动部转动;第一传动部在垂直于第一轴线的平面内的正投影具有最高点和最低点,切换元件在平面内的正投影位于最高点和最低点之间。
一种电锤,包括:机壳;电机,至少部分设置在机壳内;输出组件,包括能绕第一轴线转动的套筒;冲击组件,包括摆杆轴承和能被摆杆轴承驱动以在套筒内往复运动的冲击块,冲击块在套筒内运动时能向前输出冲击力;安装轴,设置为安装摆杆轴承,安装轴能被电机驱动绕第二轴线转动;电锤具有钻模式和锤钻模式;在电锤处于钻模式时,套筒转动;在电锤处于锤钻模式时,套筒转动,且冲击块在套筒内往复运动;电锤还包括:离合组件,具有能驱动摆杆 轴承随安装轴运动的第一状态和允许安装轴相对摆杆轴承转动的第二状态;切换组件,设置为使离合组件在第一状态和第二状态之间切换;切换组件包括切换元件,切换元件设置于第一轴线和第二轴线之间。
在一实施例中,电锤还包括:传动组件,包括能被电机驱动以绕第二轴线转动第一传动件,第一传动件与安装轴固定连接;摆杆轴承包括安装在安装轴上的轴承芯,当电锤处于锤钻模式时,套筒转动,且轴承芯与安装轴构成同步转动;摆杆轴承能沿第二轴线在安装轴上滑动至第一位置和第二位置;在摆杆轴承处于第一位置时,轴承芯与安装轴构成同步转动;在摆杆轴承处于第二位置时,安装轴能相对轴承芯转动;电锤还包括:设置为在摆杆轴承处于第二位置时限制轴承芯转动的锁止元件,在摆杆轴承处于第一位置时,锁止元件允许轴承芯转动。
在一实施例中,轴承芯连接有设置为与锁止元件配合的卡接部。
在一实施例中,传动组件包括:输入部,设置为将动力输出至摆杆轴承;轴承芯连接有在摆杆轴承处于第一位置时与输入部配合的输出部。
在一实施例中,输出部和卡接部分别设置在轴承芯的两端。
在一实施例中,锁止元件与机壳固定连接或者一体成型。
在一实施例中,轴承芯向前凸出形成卡接部。
在一实施例中,电锤还包括:切换元件,设置为驱动摆杆轴承朝向第一位置运动以使电锤进入锤钻模式。
在一实施例中,卡接部设置在轴承芯靠近切换元件的一端。
在一实施例中,电锤还包括:复位件,偏压摆杆轴承朝向卡接部与锁止元件配合的位置运动。
在一实施例中,电锤还包括:传动组件,包括能被电机驱动以绕第二轴线转动第一传动件,第一传动件与安装轴固定连接;摆杆轴承包括安装在安装轴上的轴承芯,当电锤处于锤钻模式时,套筒转动,且轴承芯与安装轴构成同步转动;摆杆轴承能沿第二轴线在安装轴上滑动至第一位置和第二位置;在摆杆轴承处于第一位置时,轴承芯与安装轴构成同步转动;在摆杆轴承处于第二位置时,安装轴能相对轴承芯转动;电锤还包括锁止元件,当摆杆轴承处于第一位置时,锁止元件与轴承芯分离,以允许轴承芯转动;当摆杆轴承处于第二位置时,锁止元件与轴承芯啮合,以限制轴承芯转动。
在一实施例中,电锤包括主机,主机包括机壳;套筒在沿第一轴线方向上 具有一个长度L1;主机在沿第一轴线方向上具有一个长度L2;机壳在垂直于第一轴线方向上具有一个长度L3;其中,长度L2与长度L1的比值范围大于等于2.5且小于等于4,长度L3的取值范围大于等于55mm且小于70mm。
在一实施例中,输出组件还包括:第一传动部,与安装轴配合,并设置为将电机的动力传递至套筒,第一传动部包括与套筒固定连接的转动件,与转动件配合的中间件;其中,转动件上形成有设置为容纳中间件的容纳空间。
在一实施例中,容纳空间的直径小于转动件的齿根圆的直径。
在一实施例中,传动组件还包括输入部,设置为将动力输出至摆杆轴承;摆杆轴承上连接有与输入部配合的输出部;当电锤处于钻模式时,输出部与输出部分离;当电锤处于锤钻模式时,输出部与输入部结合。
在一实施例中,摆杆轴承包括安装在安装轴上的轴承芯,轴承芯向后凸起形成输出部;第一传动件向内凹陷形成输入部。
在一实施例中,电锤还包括切换元件,设置为驱动摆杆轴承沿第二轴线运动以使输出部与输入部结合。
在一实施例中,电锤还包括:换挡组件,换挡组件包括设置为阻止切换元件沿第一轴线方向后退的限位部;切换元件上固定连接或一体成型有设置为与限位部配合的止挡部;当电锤处于钻模式时,限位部与止挡部抵接以使切换元件无法沿第一轴线方向向后移动;当电锤处于锤钻模式时,限位部与止挡部分离以允许切换元件沿第一轴线方向向后移动。
在一实施例中,电锤还包括安装至安装轴上以支撑安装轴的第一轴承和第二轴承;其中第一轴承与第二轴承在沿第二轴线方向上的距离大于等于30mm且小于等于50mm。
在一实施例中,第一轴承和第二轴承分别设置在摆杆轴承的两侧,且第一传动部设置在第一轴承和第二轴承的前侧。
在一实施例中,套筒沿第一轴线方向上的长度小于等于101mm。
附图说明
图1是本申请第一实施方式中电锤的立体图;
图2图1所示电锤部分结构的平面图;
图3是图1所示电锤整机的俯视图;
图4是图3所示电锤沿A-A方向的剖视图;
图5是图1所示电锤处于钻模式时的部分结构立体图;
图6是图1所示电锤处于锤钻模式时的部分结构平面图;
图7是图3所示电锤沿B-B方向的剖视图;
图8是图1所示电锤的部分结构示意图;
图9是图1所示电锤的部分结构示意图;
图10是图1所示电锤的部分结构的平面图;
图11是图1所示电锤的部分结构的分解图;
图12是图11所示电锤的部分结构的另一视角的分解图;
图13是图1所示电锤的部分结构分解图;
图14是图1所示电锤中冲击组件的俯视图;
图15是图14所示摆杆轴承沿A-A方向的剖视图;
图16是本申请第二实施方式中电锤的立体图;
图17是图16所示电锤沿第二轴线方向的剖视图;
图18是图16所示电锤处于锤钻模式时的部分结构示意图;
图19是图16所示电锤处于钻模式时的部分结构示意图;
图20是图19所示结构的局部放大图;
图21是图16所示电锤的部分结构分解图;
图22是图21所示电锤中切换元件的立体图;
图23是图21所示切换元件的另一视角的立体图。
具体实施方式
如图1所示的电锤100作为一种常用的电动工具,可以驱动功能元件61转动,该功能元件61可以为钻头,这样电锤100可以驱动功能元件61在墙面、混凝土、砖、石头等硬性材料上打孔。
为了清楚的说明本申请的技术方案,定义了如图1所示的上、下、前、后、左和右。
图1至图15示出了第一实施方式中电锤结构的示意图。如图1至图2所示,电锤100包括:主机100a和能量源,主机100a包括:机壳10、动力组件20、传动组件30、冲击组件40、输出组件50、夹持组件60和能量源,在本实施例中,能量源具体可以为电池包110。
机壳10形成有一容纳空间11,容纳空间11设置为容纳电锤100内部的各个零 部件。即动力组件20、输出组件50、传动组件30和冲击组件40至少部分设置在容纳空间11内。机壳10形成或者连接有可供用户握持的把手部12。用户可以通过握持把手部12来操作电锤100。
动力组件20用于给电锤100提供动力,动力组件20包括电机21,电机21包括能够绕电机轴线101转动的电机轴22。
传动组件30设置为将电机轴22输出的动力传递至输出组件50和冲击组件40。
输出组件50包括:套筒51,套筒51能被传动组件30驱动以绕第一轴线102转动。在一实施例中,套筒51形成有设置为收容功能元件61的收容腔,功能元件61可以插入至收容腔。夹持组件60可以将功能元件61保持在套筒51上。当套筒51绕第一轴线102转动时,能驱动功能元件61转动。
冲击组件40包括摆杆轴承40a和冲击块44,摆杆轴承能被传动组件30驱动以冲击冲击块44,冲击块44能与安装在套筒51内的功能元件61接触。这样,当摆杆轴承40a往复的冲击冲击块44时,冲击块44能够间断的向功能元件61输出冲击力,从而使得功能元件61更高效的打孔。
能量源用于给电锤100提供能量来源,能量源可以是交流电,也可以是直流电,在本实施例中采用的是直流电,即能量源具体为电池包110,电池包110与机壳10可以插接设置,也可以是分离设置的,即电池包110并不直接安装在机壳10表面,在此并不限制具体的安装方式,只要能够实现提供动力来源即可。
电锤100还包括离合组件80。离合组件80设置为断开或者闭合传动组件30和冲击组件40之间的动力传递。离合组件80具有第一状态和第二状态。当离合组件80处于第一状态时,离合组件80能将传动组件输出的动力传递至冲击组件40,这时冲击组件40能够向功能元件61输出冲击力。当离合组件80处于第一状态(如图6所示)时,功能元件61不仅被输出组件50驱动绕第一轴线102转动,同时功能元件61还接收到冲击组件40输出的驱动力,进而这时的电锤100处于锤钻模式。而当离合组件80处于第二状态(如图2所示)时,离合组件80断开传动组件30和冲击组件40之间的动力传递,传动组件30不再驱动冲击组件40,这时冲击组件40不能向功能元件61输出冲击力。从而,当离合组件80处于第二状态时,功能元件61不能被冲击组件40驱动,而仅能被输出组件50驱动而绕第一轴线102转动,进而这时的电锤100处于钻模式。
电锤100还包括切换组件70。切换组件70设置为使电锤100在钻模式和锤钻模式之间切换。切换组件70能够将来自输出组件50的驱动力传递至离合组件80, 从而使离合组件80切换至第一状态。在一实施例中,当用户需要使电锤100处于锤钻模式时,通过按压功能元件61使套筒51沿第一轴线102方向运动,进而使切换组件70驱动离合组件80切换至第一状态,从而使电锤100切换至锤钻模式。也就是说,用户不需要过多的操作步骤,就能使电锤100切换至锤钻模式,从而方便了用户使用,节省了时间,提高工作效率。
如图3至图5、图9至图12所示,传动组件30包括:安装轴31和第一传动件32和第二传动件23。第二传动件23与电机轴22构成固定连接,第一传动件32与第二传动件23啮合以接收电机21输出的动力。安装轴31与第一传动件32固定连接,也就是说,当第一传动件32转动时,安装轴31随之转动。这样,电机21可以通过第一传动件32和第二传动件23将动力输出至安装轴31以驱动安装轴31绕第二轴线103转动,第二轴线103与第一轴线102相互平行。在本实施例中,第一传动件32为锥齿轮,第二传动件23为由电机轴22自身形成与锥齿轮啮合的锥齿轮部。第一传动件32与第二传动件23也可以是其他结构,在此并不限定其具体结构,只要能够实现力的传递即可。
输出组件50还包括:第一传动部52,安装轴31上形成有第二传动部311。第一传动部52固定安装至套筒51,第二传动部311固定安装至安装轴31以随安装轴31同步转动。第一传动部52和第二传动部311均为传动齿,第一传动部52与第二传动部311啮合。这样当电锤100启动后,电机驱动安装轴31传动,安装轴31上的第二传动部311驱动第一传动部52和套筒51构成的整体转动,进而套筒51带动功能元件61转动。
冲击组件40中的摆杆轴承40a包括:打击件41、摆动杆42和轴承芯43。打击件41能在套筒51内往复运动以冲击冲击块44,进而冲击块44冲击功能元件61。打击件41与摆动杆42连接,摆动杆42安装至轴承芯43,轴承芯43设置为将摆杆轴承40a安装至安装轴31上。轴承芯43能够随安装轴31转动,轴承芯43也能不随安装轴31转动。这样,当轴承芯43随安装轴31转动时,轴承芯43带动摆动杆42做往复运动,摆动杆42带动打击件41在套筒51内做往复运动以打击冲击块44,从而冲击块44能够对功能元件61输出一个冲击力,此时,功能元件61在进行转动的同时还受到了冲击块44的冲击,进而电锤100处于锤钻模式。而当轴承芯43不随安装轴31转动时,打击件41则不能冲击冲击块44,冲击块44也不会向功能元件61输出冲击力,这时,功能元件61仅做旋转运动,进而电锤100处于钻模式。
当离合组件80处于第一状态时,离合组件80能驱动轴承芯43随着安装轴31 转动,从而使得打击件能在套筒51内往复运动以驱动冲击块44向功能元件61输出冲击力,进而这时电锤100处于锤钻模式。当离合组件80处于第二状态时,离合组件80不再驱动轴承芯43随安装轴31转动,安装轴31能够相对冲击组件40转动,安装轴31驱动输出组件50转动进而驱动功能元件61转动,这时,功能元件61仅做旋转运动,即电锤100处于钻模式。
在一实施例中,离合组件80包括:输入部81和输出部82。输入部81与安装轴31构成同步转动,输出部82与摆杆轴承40a的轴承芯43构成同步转动。输出部82能相对输入部81活动,这样输入部81能与输出部82构成配合,输入部81也能脱离与输出部82的配合。当离合组件80处于第一状态时,输出部82相对输入部81移动至与输入部81构成配合的位置,这时离合组件80能驱动摆杆轴承40a冲击冲击块44。当离合组件80处于第二状态时,输出部82相对输入部81移动至脱离与输入部81配合的位置,这时离合组件80不能驱动摆杆轴承40a,摆杆轴承40a这时不能驱动冲击块44。
如图2至图6所示,切换组件70包括切换元件71,切换元件71包括受力端711和驱动端712。受力端711与输出组件50接触且能被输出组件50驱动沿第一轴线102运动,驱动端712与离合组件80接触以驱动离合组件80在第一状态和第二状态之间切换。在输出组件50相对机壳10沿第一轴线102运动时,输出组件50驱动受力端711运动,受力端711带动驱动端712一并运动以驱动离合组件80由第二状态切换至第一状态。在上下方向上,切换元件71设置在第一轴线102的下侧。这样设置能够使电锤100的整机尺寸比较合理。切换元件71的受力端711直接连接输出组件50,且切换元件71的驱动端712直接驱动离合组件80,这样,本实施例中只需通过一个设置在套筒51的第一轴线102下侧的切换元件71就可以实现离合组件80的状态的切换,不仅结构简单,而且充分利用了第一轴线102的下侧的空间,使整机结构紧凑,排布更加合理。在一实施例中,套筒51为了容纳部分冲击组件40,套筒51沿第一轴线102方向的尺寸较大,从而套筒51在第一轴线102方向上需要占据较大的空间,而将切换元件71设置在第一轴线102的下侧,能够充分利用套筒51下侧的空间。这样设置能够避免切换元件71设置在套筒51的左侧或者右侧时,而造成套筒51和切换元件71所构成的整体在左右方向上的尺寸较大,从而能够避免机壳10在左右方向上尺寸过大,进而能够使得电锤100方便贴着左侧墙壁、右侧墙壁进行打孔。另外,这样的设置也避免切换元件71设置在第一轴线102上侧时,而造成机壳10的上表面距离第一轴线较远,从而使得电 锤100方便贴着上侧的墙壁进行打孔。
在第一轴线的下侧设置切换元件71,通过切换元件71的受力端和驱动端,当输出组件50沿第一轴线向后运动时,能够将离合组件80切换至第一状态,实现电锤从钻模式切换至锤钻模式,从而不但简化了电锤模式切换的结构,从而缩小整机的轴向尺寸。
切换元件71在垂直于第一轴线102的平面内的正投影与第一传动部52在垂直于第一轴线102的平面内的正投影至少部分重叠。也就是说,第一传动部52在垂直于第一轴线102的平面内的正投影具有最高点和最低点,切换元件71在平面内的正投影位于最高点和最低点之间。作为一种实施方式,切换元件71的受力端711与第一传动部52抵接,切换元件71的驱动端712与离合组件80连接,即套筒51受力沿第一轴线102运动时,第一传动部52随套筒51一起沿第一轴线102运动,从而使抵接在第一传动部52上的受力端711受力以沿第一轴线102滑动,进而使驱动端712驱动离合组件80切换至第一状态,进而这时电锤100处于锤钻模式。也就是说,切换元件71充分利用了套筒51下侧的空间,进而可以很好的规划安装轴31或者是其他零部件的结构以及位置,从而使整机布局更加合理。在一实施例中,切换元件71在上下方向上的尺寸小于第一传动部52在上下方向上的尺寸,也就是说,切换元件71在上下方向上的尺寸小于第一传动部52的直径,且切换元件71位于套筒51的下侧,在一实施例中,切换元件71设置在第一轴线102和第二轴线103之间,第一传动部52与安装轴31啮合连接,则第一传动部52与安装轴31的啮合处在上下方向上存在一定的高度差,通过上述设置,能够充分利用该高度差,也就说切换元件71充分利用套筒51下侧与安装轴31上侧的空间,进而在不调整结构排布的情况下,就能通过切换元件71来实现模式的切换。当然也可以是切换元件71的受力端711与套筒51上形成的驱动部抵接,以此设置同样能够实现切换功能,具体的原理、功能与受力端711抵接在第一传动部52上基本一致,因此在此不做赘述。
套筒51关于一个竖直平面P基本对称设置,其中竖直平面为一个沿上下方向的平面,第一轴线102位于平面P内,切换元件71位于第一轴线102和第二轴线103之间的部分分布在平面P的两侧,切换元件71为了实现切换功能,采用一些耐磨损的材料,从而保证机器的运行,例如高密度钢等,这些材料的重量会较重,通过上述设置,可以使得切换元件71的重量尽量分布在平面P的两侧,能保证整机的平衡。
如图1、图5所示,为了实现电锤100的工作模式的切换,电锤100还包括可供用户调节的换挡组件90。换挡组件90包括设置为阻止套筒51或者切换元件71沿第一轴线102方向后退的限位部91。用户可以调节换挡组件90使得限位部91移动至释放位置和限制位置。当换挡组件90处于释放位置时,限位部91允许套筒51和切换元件71沿第一轴线102运动,当换挡组件处于限制位置时,限位部91阻止套筒51和切换元件71沿第一轴线102方向移动。在一实施例中,切换元件71上固定连接或一体成型有设置为与限位部91配合的止挡部714。当用户调节换挡组件90使限位部91活动至限制位置时,限位部91与止挡部714抵接,限位部91阻止切换元件71沿平行与第一轴线102的方向移动,即此时切换元件71无法驱动输出部82与输入部81结合,从而使电锤100处于钻模式。当用户调节换挡组件90使限位部91活动至释放位置时,限位部91脱离止挡部714,此时限位部91允许套筒51和止挡元件沿第一轴线102方向运动,这时套筒51受到外力后退,切换元件71在收到来自套筒51的驱动力时沿平行于第一轴线102的方向移动,从而这时切换元件71能够驱动输出部82与输入部81结合,进而使电锤100进入锤钻模式。
在本实施例中,在沿第二轴线103的方向上,离合组件80设置在摆杆轴承40a的后侧。离合组件80的输入部81与第一传动件32固定连接或者一体成型,输出部82与轴承芯43固定连接或者一体成型。输入部81为形成于第一传动件32上的朝向轴承芯43延伸的第一啮合齿,输出部82为形成于摆杆轴承40a的轴承芯43上的朝向第一传动件32的第二啮合齿。当输入部81和输出部82啮合时,离合组件80处于第一状态时。当输入部81和输出部82脱离时,离合组件80处于第二状态时。切换元件71与摆杆轴承40a的轴承芯43接触。当切换元件71受到套筒51的驱动力时,切换元件71驱动轴承芯43沿第二轴线103方向朝向第一传动件32运动,这时轴承芯43上的输出部82移动至与第一传动件32上的输入部81啮合的位置,从而离合组件80切换至第一状态,进而电锤100进入锤钻模式。离合组件80还包括复位件83,复位件83偏压的设置在摆杆轴承40a和第一传动件32之间,复位件83设置为偏压输出件以使得离合组件80具有朝向第二状态切换的趋势。这样,当切换元件71未收到套筒51的驱动力时,复位件83驱动摆杆轴承40a沿第二轴线103移动至输出部82并脱离输入部81的状态,这时离合组件80处于第二状态,进而电锤100处于钻模式。
在一实施例中,输入部81由第一传动件32的端面向内凹陷形成。第一传动件32的端面向内凹陷形成有凹槽,凹槽的槽壁向第二轴线103突出形成凸出的齿 以构成输出部82。这样,一方面,对于输出部82和第一传动件32所构成的整体而言其尺寸减小,有利于减小传动组件30沿第二轴线103方向的尺寸。另一方面,输出部82在于输入部啮合时,输出部82插入至凹槽内,这样可以增大输出部82活动的行程,从而提高离合组件80的可靠性,且具有合适的空间放置复位件83,进而可以进一步的缩小传动组件30沿第二轴线103方向的尺寸,有利于缩小电锤100在前后方向的长度。输出部82由轴承芯43的端面向后延伸,轴承芯43向后延伸形成环形部,环形部的端面设置有齿以形成输出部82。复位件83设置在输出部82和输入部81之间,复位件83具体为弹簧,弹簧至少部分设置在环形部内。通过上述设置,当套筒51受力沿第一轴线102运动时,第一传动部52随之驱动切换元件71滑动,从而使切换元件71的驱动端712驱动冲击组件40沿第二轴线103运动,此时冲击组件40受力压缩弹簧,弹簧发生形变,从而使轴承芯43的结合部与第一传动件32的输入部81啮合,以使离合组件80切换至第一状态。当撤销施加在套筒51上的力时,弹簧根据自身的弹力,将驱动轴承芯43的结合部脱离输入部81,此时冲击组件40与安装轴31相对转动,以使冲击组件40切换至第二状态。上述设置,通过将轴承芯43的输出部82伸入第一传动件32内,也就是说轴承芯43与第一传动件32的连接处的位置位于第一传动件32的内侧,从而利用第一传动件32的内侧空间,在保证结构稳定的情况下,能够节省了整机在左右方向上尺寸。在一实施例中,输入部81被配置为由第一传动件32向外凸起呈齿状,输出部82被配置为向后凹陷呈齿状。以此设置从而加强两者之间的连接的结构强度,保证整机运行的稳定性。
如图14至图15所示,轴承芯43安装在安装轴31上,轴承芯43能够沿第二轴线103移动,轴承芯43内设置有设置为容纳润滑油的容纳腔431。容纳腔431内设置有润滑油,这样,能够减小轴承芯43相对安装轴31转动或者滑动的摩擦力。因轴承芯43与安装轴31之间存在相对转动,因此安装轴31与轴承芯43之间会存在间隙。电锤100在静置时,轴承芯43受重力影响会与安装轴31存在两个接触面,两个接触面为第一接触面432和第二接触面433,两个接触面之间形成容纳腔431。在沿第二轴线103方向上,容纳腔431具有第一长度A,第一接触面432具有第二长度B,第二接触面433具有第三长度C,其中第一长度A大于第二长度B与第三长度C两者之和,通过上述设置,使容纳腔431的空间较大,从而容纳腔431内可以容纳更多的润滑油,减小摩擦力,防止电锤100处于钻模式时出现冲击的情况,避免损害机器,同时还能延长冲击组件40的寿命。其中,第一长度A的取值范围 大于等于8mm且小于等于20mm,第二长度B的取值范围大于等于0.5mm且小于等于4mm,第三长度C的取值范围大于等于0.5mm且小于等于4mm。设置在上述范围内,既能保证容纳腔431具有足够的容纳空间,又能避免轴承芯43在长度方向上过长,进而延长整机的尺寸。
摆动杆42包括套设在轴承芯43上的环圈421和与环圈421一体成型的连接杆422。摆杆轴承40a还包括安装至连接杆422一端的活动套411,打击件设置在活动套411内,活动套411能带动打击件打击冲击块44。连接杆422沿第一直线104方向延伸,活动套411和环圈421设置在连接杆422的两端。轴承芯43运动时,摆动杆42能活动至第一极限位置和第二极限位置,且连接杆422能活动至第一极限位置和第二极限位置。当摆动杆42处于第一极限位置时,连接杆422向前倾斜至第一极限角度。也就说当连接杆422处于第一极限角度时,活动套411向前移动至其所能活动的最远距离,此时第一直线104与电机轴线101平行,其中第一直线104与电机轴线101之间的距离大于等于0mm且小于等于20mm。第一直线104与电机轴线101也可以不平行,但是这样设置会使活动套411前移,从而延长套筒51在前后方向上的尺寸,进而加长了整机的尺寸。或者第一直线104与电机轴线101不平行设置会使轴承芯43的位置相比与平行设置的位置更加靠后,从而需要延长安装轴31在前后方向的尺寸,进而加长整机的在长度方向的尺寸。也就是说,将第一直线104与电机轴线101平行或者重合设置并且将第一直线104与电机轴线101之间的间隙设置在上述范围内,能够在整机在前后方向上的尺寸处于一个比较合理的范围,在一实施例中,第一直线104与电机轴线101之间的距离大于等于10mm且小于等于20mm,通过上述设置,效果更好。或者,在其它实施例中,当摆动杆处于第一极限位置时,连接杆处于第一极限角度,第一直线与电机轴线相交形成大于等于0度且小于等于5度的夹角,且第一直线与电机轴线的交点在电机上,这样同样的也可以尽可能的减小摆杆轴承40a和活动套411所构成的整体沿第一轴线102方向的尺寸。当摆动杆42处于第二极限位置时,连接杆422向后倾斜至第二极限角度,也就是说当连接杆422处于第二极限角度时,活动套411向后移动至自身所能活动的最远距离,此时第一直线104与第一轴线102相交。
在本实施例中,冲击组件40的重量与电机21的输出功率的比值大于等于0.09g/W且小于等于0.16g/W。在一些其他的实施例中,冲击组件40的重量与电机21的输出功率的比值大于等于0.06g/W且小于等于0.12g/W。在减小冲击组件 40的重量的同时,电机21又能输出足够大的输出功率时,进而既能保证性能又能使整机的重量减轻。
如图2、图11和图12所示,电锤100还包括设置为支撑安装轴31的支撑支架13。支撑支架13与机壳10固定连接或者一体成型,支撑支架13将机壳10分割成第一空间15和第二空间16,轴承芯43位于第二空间16内,即在前后方向上,第一空间15位于第二空间16的前侧。支撑支架13套设在套筒51上,并设置为给套筒51定位,安装轴31穿过支撑支架13,以保证套筒51与安装轴31两者之间的间距恒定。套筒51与安装轴31能够相对支撑支架13转动,在上下方向上,安装轴31设置在套筒51的下方。在前后方向上,支撑支架13设置在离合组件80的前侧。
如图2至图4所示,电锤100还包括设置为定位安装轴31的定位组件,定位组件包括第一轴承17和第二轴承18,第一轴承17和第二轴承18分别设置在离合组件80的两侧。第一轴承17安装至安装轴31并位于离合组件80的前侧,第一轴承17设置在支撑支架13内。支撑支架13上形成有设置为安装第一轴承17的安装孔。第二轴承18安装至安装轴31并位于离合组件80的后侧,第二轴承18设置在机壳10内。在本实施例中,第一轴承17和第二轴承18之间的距离与主机100a的重量的乘积大于等于27mm·kg且小于等于58mm·kg。在一实施例中,第一轴承17和第二轴承18之间的距离与主机100a的重量的乘积大于等于40mm·kg且小于等于58mm·kg。通过对离合组件80、切换组件70以及冲击组件40的结构以及位置的设置,使得第一轴承17和第二轴承18之间的距离减小,从而缩短了传动组件30沿第二轴线103方向的尺寸,进而使得主机100a沿前后方向的尺寸减小,有利于电锤100的小型化。而且通过对离合组件80、切换组件70以及冲击组件40的结构以及位置的设置,使得主机100a的重量也大大的降低,从而获得一个尺寸小、重量轻的电锤100。在一实施例中,电机21的输出功率大于等于360W且小于等于440W,从而,在电锤100的尺寸小、重量轻的前提下还能够保证电锤100具有较大的功率。
在前后方向上,第二传动部设置在第一轴承的前侧,第一传动部设置在第一轴承的前侧。这样设置,可以合理布置离合组件80、切换组件70以及冲击组件40的结构以及位置,
在本实施例中,第一轴承17与第二轴承18在沿第二轴线103方向上的距离D大于等于30mm且小于等于50mm,在一些其他实施例中,第一轴承17与第二轴承18在沿第二轴线103方向上的距离D大于等于40mm且小于等于46mm,这样设置, 使第一轴承17和第二轴承18之间的距离设置在一个合适的范围内,即可以使第一轴承17和第二轴承18之间具有足够的空间设置冲击组件40、切换组件70和离合组件80,同时又能避免第一轴承17与第二轴承18之间间距过大,而造成整机长度过长的情况。
在一实施例中,主机100a的重量与电机21的输出功率的比值大于等于2.2g/W且小于等于4.5g/W,在一些其他的实施例中,主机100a的重量与电机21的输出功率的比值大于等于3g/W且小于等于4g/W,这样使得电机141在最大输出功率满足工作需求的情况下大大降低了主机100a的重量,进一步便于用户操作。
如图11至图12所示,支撑支架13上至少形成一个导向切换元件71运动的导槽131。切换元件71部分穿过导槽131并且能够沿着导槽131往复运动,当输出组件50沿第一轴线102运动时,受力端711能够传递来自输出组件50的驱动力,通过驱动端712将该驱动力传递至离合组件80,从而使离合组件80切换至第一状态。支撑支架13也可形成有两个分别设置在平面P两侧的导槽131。切换元件71上形成有与导槽131对应设置的两个间隔设置的伸出部713,每个伸出部713上形成有对应的受力端711,在一实施例中,切换元件71受力能够沿导槽131滑动,也就是说,切换元件71在运动的过程中能够给离合组件80施加一个驱动力,从而使电锤100从钻模式切换至锤钻模式。导槽131设置在支撑支架13的外边缘上,从而方便零部件的加工,简化零部件的加工工艺。导槽131与第一轴线102平行,以使切换元件71在保证能够实现功能转化的情况下,在沿第一轴线102的方向上的长度最小。当然切换元件71也可以不是采用滑动的方式,比如也可以采用弹簧等,利用弹簧本身的特性来实现对离合组件80的驱动。
支撑支架13上至少形成一个能够贯穿第一空间15和第二空间16的排气孔,在本申请中排气孔可以用导槽替代,也就是说在本实施例中,导槽131不但可以用来引导切换元件71的运动,还可以用来排气、吸气,进而可以保证机器正常运行。
如图4、图13所示,第一传动部52固定连接在套筒51上,切换元件71的受力端711抵接在第一传动部52上。套筒51上固定连接有定位件53,定位件53设置为限制第一传动部52在套筒51上向后移动,套筒51上形成有定位槽54,定位槽54设置为安装定位件53,定位槽54沿套筒51的外周边向内径向凹陷,从而安装、固定定位件53。第一传动部52包括中间件521和转动件522,中间件521设置为与切换元件71接触,转动件522设置为与第二传动部接触以接收传动组件30输出的 动力。转动件522上形成有容纳空间5221,容纳空间5221自转动件522向内凹陷而成,中间件521至少部分容纳在容纳空间5221内。在本实施例中,切换元件71抵接在中间件521上,定位件53为卡簧,中间件521具体为垫片,转动件522为齿轮。在运行的过程中,卡簧与齿轮存在相对运行,这样会磨损齿轮,影响齿轮的寿命,同时若是将切换元件71抵接在齿轮上,切换元件71会磨损齿轮,进而影响齿轮的寿命。而通过在齿轮的后端面设置垫片,可以避免切换元件71直接磨损齿轮,从而延长齿轮的寿命。也可以将垫片直接安装在齿轮的后端部,但是这样会要增加齿轮与垫片在轴线上的尺寸,进而延长套筒51在轴线上的尺寸,而通过上述在齿轮内设置容纳空间5221,可以避免增加齿轮与垫片所构成的整体在第一轴线102方向上的尺寸的情况,而且又因容纳空间5221的存在,可以减轻齿轮的重量,进而减轻整机的重量。
容纳空间5221具体设置在齿轮的后端面,由齿轮的后端面向前凹陷形成,且容纳空间5221的直径小于齿轮的齿根圆的直径。这样在保证容纳空间5221有充分的空间容纳垫片的情况下,还能不影响齿轮的有效齿宽,保证齿轮与安装轴31连接的稳定性。
在本实施例中,套筒51沿第一轴线102方向上具有一个长度L1,主机100a在沿第一轴线102上具有一个长度L2,机壳10在垂直于第一轴线102的方向上具有一长度L3,其中,长度L2与长度L1的比值范围大于等于2.5且小于等于4,长度L3的取值范围大于等于55mm且小于70mm。在其它一些实施例中,长度L2与长度L1的比值范围大于等于3且小于等于4。这样,通过主机100a内离合组件80、冲击组件40、输出组件50的位置与结构的设置,在减小主机100a长度与宽度的同时,又能使套筒51具有足够的空间能使打击件做往复运动,从而保证整机运行的平稳性,这样设置能使冲击组件41具有足够的活动行程,同时又能使套筒51在第一轴线102方向上的长度在一个合理的范围内,使整机结构小巧,避免整机在沿第一轴线102方向上的长度过长的情况,从而便于用户操作。在本实施例中,长度L1的取值范围大于等于80mm且小于等于101mm。需要注意的是,其中长度L3的指的是,包裹套筒51的机壳10的宽度。
如图7至图8所示,电锤100还包括锁止组件,锁止组件用来锁定冲击组件40,锁止组件包括锁止元件14。当离合组件80处于第一状态时,锁止元件14释放冲击组件40的运动。当离合组件80处于第二状态时,锁止元件14阻止冲击组件40运动。摆杆轴承40a在安装轴31上滑动的过程中,具有第一位置(如图6所示) 和第二位置(如图2所示),当摆杆轴承40a处于第一位置时,轴承芯43与安装轴31构成同步转动,即此时电锤100处于锤钻模式,当摆杆轴承40a处于第二外置时,轴承芯43能相对安装轴31转动,即此时电锤100处于钻模式。为了延长冲击组件40的寿命,同时也为了便于摆杆轴承40a在安装轴31上滑动,往往会在轴承芯43内添加润滑油,但是这样设置会使安装轴31与轴承芯43之间会因润滑油的存在而产生摩擦力,也就是说,在电锤100处于钻模式时,会因摩擦力的存在,从而会使安装轴31转动的时候带动摆杆轴承40a运动,进而使电锤100在钻模式的情况下,打击件在套筒51内往复运动以打击冲击块44,冲击块44向功能元件输出冲击力,这样容易损坏加工工件,影响工作进度。通过设置设置为阻止冲击组件40打击冲击块44的锁止元件14,能够避免上述情况发生,从而保证机器运行的进度,提升用户的体验感。同时也降低了机器的故障率。
当摆杆轴承40a处于第一位置时,锁止元件14与轴承芯43分离,轴承芯43能够与安装轴31构成同步转动,当摆杆轴承40a处于第二位置时,锁止元件14与轴承芯43啮合,即安装轴31能够相对轴承芯43转动。在本实施例中,锁止元件14与机壳10固定连接或者一体成型,锁止元件14包括锁止部141,轴承芯43上设有与锁止部141相配合的卡接部434,在一实施例中,轴承芯43向前凸出形成卡接部434,从而与锁止部141配合,当然也可以是轴承芯43向内凹陷成卡接部434。在无外力的驱动下,复位件83驱动轴承芯43脱离第一传动件32,轴承芯43沿第二轴线103运动至卡接部434与锁止部141配合的位置。在一实施例中,卡接部434设置在轴承芯43的前侧,锁止部141设置在卡接部434的周向上的任意位置处。锁止部141可以是固定连接在机壳10上的销、拨叉等,在本实施例中锁止部141为由机壳10延伸出的筋位所成,且锁止部41由耐磨材料所制成。当然也可以有其他实施方式,只要能够实现在摆杆轴承40a处于第一位置时允许轴承芯43随安装轴31转动,在摆杆轴承40a处于第二位置时限制轴承芯43转动即可。
图16至图23示出了第二实施方式中电锤内部结构的示意图。在本实施方式中电机、输出组件、支撑支架和功能附件等与第一实施方式中基本相同,区别在于切换组件、传动组件和锁止组件的具体结构不同。也就是说第一实施方式中与本实施方式中相适应的部分均可以应用到本实施方式中,以下仅介绍本实施方式与第一实施方式的区别部分。
如图16至图18所示,电锤200包括离合组件270,离合组件270用来使电锤200在钻模式和锤钻模式之间切换。冲击组件包括:摆杆轴承240,摆杆轴承240包 括第一运行状态(如图18所示)和第二运行状态(如图19所示),当摆杆轴承240处于第一运行状态时,摆杆轴承240的轴承芯241随安装轴231转动,此时电锤200处于锤钻模式。当摆杆轴承240处于第二运行状态时,摆杆轴承240的轴承芯241相对安装轴231转动,此时电锤200处于钻模式。
离合组件270包括离合件271和弹性件272,其中,弹性件272能够向离合件271施加一个靠近摆杆轴承240的弹性力,从而使摆杆轴承240进入第一运行状态,即电锤200进入锤钻模式。当离合件271被驱动以克服弹性力并朝向远离摆杆轴承240的方向运动时,摆杆轴承240进入第二运行状态,即电锤200进入钻模式。也就是说只需通过采用离合件271和弹性件272就能实现功能模式切换,大大的节省了零件,不但能减小体积、缩短整机尺寸,还能简化结构,便于加工。进一步通过上述设置还能减轻整机重量,方便用户操作机器。
如图16、图21至图23所示,电锤200还包括换挡组件290,换挡组件290包括设置为驱动离合件271的换挡件291,换挡件291供用户操作。用户通过驱动换挡件291从而实现电锤200的钻模式与锤钻模式之间的切换。
在一实施例中,离合件271与摆杆轴承240的轴承芯241构成同步转动。离合件271上形成有啮合部2712,安装轴231上形成有设置为与离合件271上的啮合部712配合的连接部2311。当连接部2311和啮合部2712配合时,离合件271处于能使得摆杆轴承240的轴承芯241随安装轴231转动的第一切换状态(如图18所示),这时冲击组件能输出冲击力,电锤200处于锤钻模式。当连接部2311和啮合部2712脱离时,离合件271处于断开安装轴231和轴承芯241之间的动力传递的第二切换状态(如图19、20所示),这时冲击组件不能输出冲击力,电锤200处于钻模式。
在一实施例中,离合件271套装在安装轴231上,离合件271能沿第二轴线203方向在安装轴231上滑动。离合件271能相对安装轴231转动,离合件271的内壁形成了啮合部2712,啮合部2712具体为离合件271内壁上形成的第一啮合齿。连接部2311为安装轴231上固定连接或者一体成型的第一主动齿。当离合件271朝向靠近摆杆轴承240的方向运动时,离合件271的啮合部2712移动至与安装轴231上的连接部2311啮合的状态。当离合件271朝向远离摆杆轴承240的方向运动时,离合件271的啮合部2712移动至脱离连接部2311的状态。
换挡件291在被用户操作时能驱动离合件271沿第二轴线203运动以使得摆杆轴承240在第一运行状态和第二运行状态之间切换。换挡件291包括驱动部292, 驱动部292能够给离合件271施加一个驱动力,从而使离合件271向远离摆杆轴承240的方向运动,进而使摆杆轴承240进入第一运行状态。在一实施例中,离合件271上设置有与驱动部292配合的受力部2711。当用户操作换挡件291时,驱动部292驱动受力部2711向前运动,使离合件271上的啮合部2712与安装轴231上的连接部2311分离,进而使安装轴231能够相对轴承芯241运动。离合件271上形成有配合部2713,轴承芯241上形成有设置为与离合件271上的配合部2713配合的延伸部2411,离合件271与摆杆轴承240的轴承芯241构成同步转动。配合部2713设置在啮合部2712的后端,配合部2713具体为离合件271内壁上形成的第二啮合齿。延伸部2411为轴承芯241上固定连接或者一体成型的第二主动齿。在离合件271滑动的过程中,第二啮合齿和第二主动齿始终保持啮合。
弹性件272套装在安装轴231上,弹性件272至少部分设置在离合件271的内部,在沿第二轴线的方向上,弹性件272设置在离合件271的前侧。在本实施例中,弹性件272的前端与安装轴231上的第一轴承217连接,弹性件272的后端与离合件271上的啮合部2712连接。
如图19至图23所示,电锤200还包括设置为锁定摆杆轴承240的锁止组件214,即当电锤200处于钻模式时,锁止组件214阻止摆杆轴承240的轴承芯241转动。当电锤200处于锤钻模式时,锁止组件214允许摆杆轴承240的轴承芯241转动。
在本实施例中,锁止组件214包括锁止元件215,锁止元件215上连接有能变形的锁止部216,离合件271上连接与锁止部216配合的设置为阻止离合件271转动的卡接部2714。机壳210上形成有容纳部211,锁止元件215至少部分设置在容纳部211内。锁止元件215采用柔性件制成,例如弹簧销、弹性柱等,在本实施例中锁止元件215为扭簧,扭簧安装在容纳部211内,扭簧的端部向上延伸,能够与离合件271配合。卡接部2714为离合件271上向前凸出形成的止挡齿。当电锤200处于钻模式时,扭簧与离合件271的止挡齿卡接,即此时离合件271无法转动,从而使轴承芯241无法运动。当电锤200处于锤钻模式时,扭簧与止挡齿不接触,即此时轴承芯2411能够随离合件271的转动而转动。其中变形指的是,当止挡齿与锁止部216卡接时,止挡齿低压锁止部216,即止挡齿对锁止部216施加了一个接触力,锁止部216接收该接触力并产生变形,从而避免损坏零部件,同时锁止部216产生一个避免止挡齿脱离锁止部216转动的力,从而保证结构的稳定性。
本文中提及的主机指的是,去除功能附件、能量源、辅助把手的裸机。

Claims (30)

  1. 一种电锤,包括:
    机壳;
    电机,至少部分设置在所述机壳内;
    输出组件,包括能绕第一轴线转动的套筒;
    冲击组件,包括摆杆轴承和能被所述摆杆轴承驱动以在所述套筒内往复运动的冲击块,所述冲击块在所述套筒内运动时能向前输出冲击力;
    安装轴,用于安装所述摆杆轴承,所述安装轴能被所述电机驱动绕第二轴线转动;
    所述电锤具有钻模式和锤钻模式;
    在所述电锤处于所述钻模式时,所述套筒转动;
    在所述电锤处于所述锤钻模式时,所述套筒转动,且所述冲击块在所述套筒内往复运动;
    其中:
    所述电锤还包括:
    离合组件,具有能驱动所述摆杆轴承随所述安装轴运动的第一状态和允许所述安装轴相对所述摆杆轴承转动的第二状态;
    切换组件,设置为使所述离合组件在所述第一状态和所述第二状态之间切换;所述切换组件包括切换元件,所述切换元件包括受力端和驱动端,在所述输出组件沿所述第一轴线运动时驱动所述受力端运动,所述驱动端设置为驱动所述离合组件切换至所述第一状态;
    其中,所述切换元件设置在所述第一轴线的下侧。
  2. 根据权利要求1所述的电锤,其中:所述切换元件设置在所述第一轴线和所述第二轴线之间。
  3. 根据权利要求1所述的电锤,其中:所述套筒关于一个竖直平面基本对称设置;所述切换元件位于所述第一轴线和所述第二轴线之间的部分分布在所述平面的两侧。
  4. 根据权利要求1所述的电锤,还包括:第一传动件,设置为接收所述电机输出的动力以驱动所述安装轴转动;
    所述离合组件包括:
    输入部,与所述第一传动件或所述安装轴构成同步转动;
    输出部,在与所述输入部配合时驱动所述摆杆轴承运动;
    所述摆杆轴承能在所述安装轴上沿所述第二轴线滑动,所述输出部能随所述摆杆轴承一并沿所述第二轴线滑动,所述切换元件设置在所述摆杆轴承的前侧且能驱动所述摆杆轴承和所述输出部所构成的整体沿第二轴线滑动。
  5. 根据权利要求4所述的电锤,其中:所述摆杆轴承包括安装至所述安装轴的轴承芯,所述轴承芯朝向所述第一传动件延伸以形成所述输出部。
  6. 根据权利要求1所述的电锤,其中:所述输出组件还包括:
    第一传动部,与所述套筒固定连接;及
    第二传动部,与所述安装轴构成同步转动,所述第二传动部驱动所述第一传动部转动;
    其中,所述切换元件的受力端与所述第一传动部抵接。
  7. 根据权利要求1所述的电锤,还包括支撑支架,与所述机壳固定连接或者一体成型,所述支撑支架设置为支撑所述安装轴;所述支撑支架上形成或者固定连接有可供所述切换元件运动的导槽。
  8. 根据权利要求1所述的电锤,其中:所述切换元件设置在所述套筒和所述安装轴之间。
  9. 根据权利要求1所述的电锤,其中:所述输出组件还包括:
    第一传动部,与所述套筒固定连接;及
    第二传动部,与所述安装轴构成同步转动,所述第二传动部驱动所述第一传动部转动;
    所述第一传动部在垂直于所述第一轴线的平面内的正投影具有最高点和最低点,所述切换元件在所述平面内的正投影位于所述最高点和最低点之间。
  10. 一种电锤,包括:
    机壳;
    电机,至少部分设置在所述机壳内;
    输出组件,包括能绕第一轴线转动的套筒;
    冲击组件,包括摆杆轴承和能被所述摆杆轴承驱动以在所述套筒内往复运动的冲击块,所述冲击块在所述套筒内运动时能向前输出冲击力;及
    安装轴,设置为安装所述摆杆轴承,所述安装轴能被所述电机驱动绕第二轴线转动;
    所述电锤具有钻模式和锤钻模式;
    在所述电锤处于所述钻模式时,所述套筒转动;
    在所述电锤处于所述锤钻模式时,所述套筒转动,且所述冲击块在所述套筒内往复运动;
    其中:
    所述电锤还包括:
    离合组件,具有能驱动所述摆杆轴承随所述安装轴运动的第一状态和允许所述安装轴相对所述摆杆轴承转动的第二状态;及
    切换组件,设置为使所述离合组件在所述第一状态和所述第二状态之间切换;
    所述切换组件包括切换元件,所述切换元件设置于所述第一轴线和所述第二轴线之间。
  11. 根据权利要求1所述的电锤,还包括:
    传动组件,包括能被所述电机驱动以绕第二轴线转动第一传动件,所述第一传动件与所述安装轴固定连接;
    所述摆杆轴承包括安装在所述安装轴上的轴承芯,当所述电锤处于所述锤钻模式时,所述套筒转动,且所述轴承芯与所述安装轴构成同步转动;
    所述摆杆轴承能沿第二轴线在所述安装轴上滑动至第一位置和第二位置;在所述摆杆轴承处于所述第一位置时,所述轴承芯与所述安装轴构成同步转动;在所述摆杆轴承处于所述第二位置时,所述安装轴能相对所述轴承芯转动;
    所述电锤还包括:设置为在所述摆杆轴承处于所述第二位置时限制所述轴承芯转动的锁止元件,在所述摆杆轴承处于所述第一位置时,所述锁止元件允许所述轴承芯转动。
  12. 根据权利要求11所述的电锤,其中:所述轴承芯连接有与所述锁止元件配合的卡接部。
  13. 根据权利要求12所述的电锤,其中:传动组件包括:输入部,设置为将动力输出至所述摆杆轴承;所述轴承芯连接有在所述摆杆轴承处于所述第一位置时与所述输入部配合的输出部。
  14. 根据权利要求13所述的电锤,其中:
    所述输出部和所述卡接部分别设置在所述轴承芯的两端。
  15. 根据权利要求11所述的电锤,其中:所述锁止元件与所述机壳固定连接或者一体成型。
  16. 根据权利要求11所述的电锤,其中:所述轴承芯向前凸出形成所述卡 接部。
  17. 根据权利要求11所述的电锤,还包括:切换元件,设置为驱动所述摆杆轴承朝向所述第一位置运动以使所述电锤进入所述锤钻模式。
  18. 根据权利要求17所述的电锤,其中:所述卡接部设置在所述轴承芯靠近所述切换元件的一端。
  19. 根据权利要求11所述的电锤,还包括:复位件,偏压所述摆杆轴承朝向所述卡接部与所述锁止元件配合的位置运动。
  20. 根据权利要求1所述的电锤,还包括:
    传动组件,包括能被所述电机驱动以绕第二轴线转动第一传动件,所述第一传动件与所述安装轴固定连接;
    所述摆杆轴承包括安装在所述安装轴上的轴承芯,当所述电锤处于所述锤钻模式时,所述套筒转动,且所述轴承芯与所述安装轴构成同步转动;
    所述摆杆轴承能沿第二轴线在所述安装轴上滑动至第一位置和第二位置;在所述摆杆轴承处于所述第一位置时,所述轴承芯与所述安装轴构成同步转动;在所述摆杆轴承处于所述第二位置时,所述安装轴能相对所述轴承芯转动;
    所述电锤还包括锁止元件,当所述摆杆轴承处于所述第一位置时,所述锁止元件与所述轴承芯分离,以允许所述轴承芯转动;当所述摆杆轴承处于所述第二位置时,所述锁止元件与所述轴承芯啮合,以限制所述轴承芯转动。
  21. 根据权利要求1所述的电锤,还包括主机,所述主机包括所述机壳;
    所述套筒在沿所述第一轴线方向上具有一个长度L1;
    所述主机在沿所述第一轴线方向上具有一个长度L2;
    所述机壳在垂直于所述第一轴线方向上具有一个长度L3;
    其中,长度L2与长度L1的比值范围大于等于2.5且小于等于4,长度L3的取值范围大于等于55mm且小于70mm。
  22. 根据权利要求21所述的电锤,其中:所述输出组件还包括:第一传动部,与所述安装轴配合,并设置为将所述电机的动力传递至所述套筒,所述第一传动部包括与所述套筒固定连接的转动件,及与所述转动件配合的中间件;
    其中,所述转动件上形成有设置为容纳所述中间件的容纳空间。
  23. 根据权利要求22所述的电锤,其中:所述容纳空间的直径小于所述转动件的齿根圆的直径。
  24. 根据权利要求21所述的电锤,其中:所述传动组件还包括输入部,设 置为将动力输出至所述摆杆轴承;所述摆杆轴承上连接有与所述输入部配合的输出部;
    当所述电锤处于钻模式时,所述输出部与所述输出部分离;
    当所述电锤处于锤钻模式时,所述输出部与所述输入部结合。
  25. 根据权利要求24所述的电锤,其中:所述摆杆轴承包括安装在所述安装轴上的轴承芯,所述轴承芯向后凸起形成所述输出部;
    所述第一传动件向内凹陷形成所述输入部。
  26. 根据权利要求24所述的电锤,还包括切换元件,所述切换元件设置为驱动所述摆杆轴承沿所述第二轴线运动以使所述输出部与所述输入部结合。
  27. 根据权利要求26所述的电锤,还包括:
    换挡组件,包括设置为阻止所述切换元件沿所述第一轴线方向后退的限位部;
    所述切换元件上固定连接或一体成型有设置为与所述限位部配合的止挡部;
    当所述电锤处于钻模式时,所述限位部与所述止挡部抵接以使所述切换元件无法沿所述第一轴线方向向后移动;
    当所述电锤处于锤钻模式时,所述限位部与所述止挡部分离以允许所述切换元件沿所述第一轴线方向向后移动。
  28. 根据权利要求22所述的电锤,还包括安装至所述安装轴上以支撑所述安装轴的第一轴承和第二轴承;
    其中所述第一轴承与所述第二轴承在沿所述第二轴线方向上的距离大于等于30mm且小于等于50mm。
  29. 根据权利要求28所述的电锤,其中:所述第一轴承和所述第二轴承分别设置在所述摆杆轴承的两侧,且所述第一传动部设置在所述第一轴承和所述第二轴承的前侧。
  30. 根据权利要求1所述的电锤,其中:所述套筒沿第一轴线方向上的长度小于等于101mm。
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