WO2023236709A1 - 动力工具 - Google Patents

动力工具 Download PDF

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Publication number
WO2023236709A1
WO2023236709A1 PCT/CN2023/093150 CN2023093150W WO2023236709A1 WO 2023236709 A1 WO2023236709 A1 WO 2023236709A1 CN 2023093150 W CN2023093150 W CN 2023093150W WO 2023236709 A1 WO2023236709 A1 WO 2023236709A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
eccentric
output shaft
bearing
power tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/093150
Other languages
English (en)
French (fr)
Inventor
徐中全
付祥青
王洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Chervon Industry Co Ltd
Original Assignee
Nanjing Chervon Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Chervon Industry Co Ltd filed Critical Nanjing Chervon Industry Co Ltd
Priority to EP23818874.2A priority Critical patent/EP4501547A4/en
Publication of WO2023236709A1 publication Critical patent/WO2023236709A1/zh
Priority to US18/937,830 priority patent/US20250058448A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B19/00—Other reciprocating saws with power drive; Fret-saws
    • B27B19/006—Other reciprocating saws with power drive; Fret-saws with oscillating saw blades; Hand saws with oscillating saw blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/16—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of drives or feed mechanisms for straight tools, e.g. saw blades, or bows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor

Definitions

  • the present application relates to an electric power tool, for example, to a swing power tool.
  • the multi-function tool usually drives the work accessory to swing through the swing part to achieve cutting, grinding and other operations on objects.
  • the swing angle of oscillating multi-functional tools has been increasing in recent years.
  • the swing angle of the tool has increased from ⁇ 1.4° to ⁇ 1.8° and ⁇ 2.0°, and even to ⁇ 2.5°; increasing the swing angle can Improve work efficiency.
  • using a smaller swing angle can improve processing precision.
  • This application provides a power tool that can automatically adapt to different working conditions.
  • An embodiment of the present application provides a power tool, including: a motor including a drive shaft rotating around a first axis; an output assembly including an output shaft centered on the output axis; and a working attachment driven by the output shaft to reciprocate. Swing; a transmission component for transmitting power between the motor and the output component to drive the output shaft to swing back and forth; and an adjustment component for adjusting the transmission component; the adjustment component is configured as When the load of the output shaft meets the preset value of the adjustment component, the adjustment component controls the transmission component according to the load of the output shaft, so that the transmission component adjusts the swing angle of the working attachment.
  • the transmission assembly includes: a first bearing for supporting the drive shaft, a shift fork for supporting the output shaft, and a second bearing for driving the shift fork to produce a reciprocating swing.
  • the eccentric member includes a central part connected to the first bearing and an eccentric part connected to the second bearing.
  • the axis of the eccentric portion is eccentrically arranged relative to the axis of the central portion.
  • the transmission assembly is set in different working modes.
  • the output shaft drives the working accessory to reciprocate at different angles.
  • the axis of the eccentric portion and the first axis have different eccentricities.
  • the first bearing includes: a central hole for connecting the drive shaft and a first eccentric hole provided with an eccentric distance from the central hole, and the center line of the first eccentric hole is the third Two axes, the central part of the eccentric member is connected to the first eccentric hole.
  • the second bearing drives the eccentric member to reciprocally swing in a prescribed stroke using the second axis as a rotation axis.
  • the adjustment assembly includes: a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • Directional bias of the drive shaft is not limited to: a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • the eccentric member applies a first pressure to the first biasing element away from the drive shaft when the output shaft is loaded.
  • the eccentric member when the first pressure is greater than the biasing force, the eccentric member moves away from the drive shaft.
  • the second bearing is slidably connected to the eccentric part along the axis of the eccentric part, and the second bearing reciprocates back and forth relative to the output shaft along the axis of the eccentric part with a prescribed stroke. slide.
  • the eccentricity between the axis of the eccentric portion and the first axis remains constant.
  • the shift fork includes a first support portion connected to the second bearing, the first support portion extending along the first axis.
  • the second bearing when the transmission assembly adjusts the swing angle of the working accessory, the second bearing is driven to cooperate with the first support part at different positions.
  • an included angle is provided between the axis of the eccentric portion and the first axis, and the included angle is greater than or equal to 0° and less than or equal to 5°.
  • a power tool including: a motor including a drive shaft rotating around a first axis; an output assembly including an output shaft centered on the output axis; and a working attachment driven by the output shaft to reciprocate; the output assembly According to different loads on the output shaft, the working attachment driven by the output assembly swings at different angles.
  • a power tool includes: a motor including a drive shaft rotating around a first axis; an output assembly including an output shaft centered on the output axis; a working attachment driven by the output shaft to reciprocate; the power tool also including: and an adjustment component configured to adjust the output shaft according to the The load adjusts the swing angle of the working attachment driven by the output shaft.
  • the power tool further includes: a transmission assembly for transmitting power between the motor and the output assembly to drive the output shaft to reciprocate, and the transmission assembly includes: a first a bearing for supporting the drive shaft, a shift fork for supporting the output shaft, a second bearing for driving the shift fork to produce a reciprocating swing, an eccentric member including a central portion connected to the first bearing and Connect the eccentric part of the second bearing.
  • the second bearing when adjusting the swing angle of the working accessory driven by the output shaft, drives the eccentric member to swing back and forth in a prescribed stroke using the second axis as the rotation axis.
  • the adjustment assembly includes: a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • Directional bias of the drive shaft is not limited to: a first biasing element that supports the eccentric member and applies a biasing force to the eccentric member so that the eccentric member moves closer to the eccentric member.
  • a power tool includes: a motor including a drive shaft rotating around a first axis; an output assembly including an output shaft centered on the output axis; a working accessory driven by the output shaft to reciprocate; and a transmission assembly for Power is transmitted between the motor and the output component to drive the output shaft to swing back and forth.
  • the transmission component is set to different working modes. When the transmission component is in different working modes, the output The shaft drives the working attachment to reciprocate at different angles; the operating component is used to control the motor and drive the transmission component to switch between a plurality of the working modes.
  • the power tool further includes: a housing, the housing is provided with a receiving cavity, the motor is at least partially disposed in the receiving cavity, and the operating component includes a housing provided outside the housing for operation.
  • the connecting part is connected to a drive circuit of the motor, and the connecting part is driven to start or shut down the motor by operating the triggering part.
  • the operating component includes a plurality of preset positions that can stop the triggering part, and the plurality of preset positions respectively correspond to the working mode of the transmission component and the working state of the motor.
  • the power tool further includes a controller that adjusts the output speed of the motor according to a preset position of the operating component.
  • the power tool further includes a controller, the connecting part is connected to the controller, and the connecting part is driven by operating the triggering part to cause the transmission assembly to switch between the working modes. During switching, the connecting part simultaneously adjusts the motor speed through the controller.
  • the transmission assembly includes: a first bearing for supporting the drive shaft, a shift fork for supporting the output shaft, and a second bearing for driving the shift fork to produce a reciprocating swing.
  • the eccentric member includes a central part connected to the first bearing and an eccentric part connected to the second bearing, wherein the axis of the eccentric part is eccentrically arranged relative to the axis of the central part.
  • the second bearing is slidably connected to the eccentric part along the axis of the eccentric part, and the operating component drives the second bearing to have a prescribed stroke along the axis of the eccentric part relative to the eccentric part.
  • the output shaft slides back and forth.
  • the shift fork includes: a first support portion connected to the second bearing, the first support portion extending along the first axis, when the transmission assembly is between the working modes During switching, the second bearing is driven to cooperate with the first support part at different positions.
  • the connecting portion is connected to the second bearing.
  • Figure 1 is a structural diagram of the first embodiment of the present application.
  • Figure 2 is a cross-sectional view of the first embodiment in Figure 1;
  • Figure 3 is an exploded view of the first embodiment in Figure 1 with the outer shell removed;
  • Figure 4 is a cross-sectional view of the first bearing
  • Figure 5 is a cross-sectional view of the eccentric member
  • Figure 6 is a partial enlarged view of the transmission assembly in the first working mode of the first embodiment in Figure 1;
  • Figure 7 is a partial enlarged view of the transmission assembly in the second working mode of the first embodiment in Figure 1;
  • Figure 8 is a schematic diagram of the transmission assembly in the first working mode according to the second embodiment of the present application.
  • Figure 9 is a schematic diagram of the transmission assembly in the second working mode according to the second embodiment of the present application.
  • Figure 10 is a structural diagram of the third embodiment of the present application.
  • Figure 11 is an internal structure diagram of the third embodiment of the present application.
  • Figure 12 is a circuit block diagram of an embodiment of the present application.
  • connection should be understood in a broad sense.
  • it can be a fixed connection, a detachable connection, or an integral body.
  • It can be a mechanical connection or an electrical connection; it can be a direct connection or an intermediate connection.
  • the medium is indirectly connected, which can be the internal connection between two components or the interaction between two components.
  • the term “above” or “below” a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the power tool is a multifunctional tool 100 and the power tool is a swing type tool.
  • the oscillating tool can be equipped with different working accessories 20, such as triangular sand, shovel blades, metal saw blades, woodworking saw blades, emery saw blades, etc., through these different working accessories 20, power can be achieved.
  • the tool 100 implements the functions of sawing, sanding, filing, shoveling, etc.
  • FIG. 1 shows a multifunctional tool 100 according to one embodiment of the present application.
  • Multifunctional tool 100 includes power supply device 30 .
  • the power supply device 30 is used to provide electric energy to the multifunctional tool 100 .
  • the power supply device 30 is a battery pack, and the battery pack cooperates with the corresponding power circuit to supply power to the corresponding components in the multifunctional tool 100 .
  • the battery pack may be a lithium battery pack, a solid-state battery pack, or a pouch battery pack.
  • the battery pack has a nominal voltage of 10.8V, 24V, 36V, 48V, 56V, or 80V.
  • the power supply device 30 is not limited to the scenario of using a battery pack, but can also supply power to corresponding components in the machine through commercial power, AC power, and corresponding rectification, filtering, and voltage regulation circuits.
  • the multifunctional tool 100 includes a housing 11 , a motor 12 , an output assembly 13 and a transmission assembly 14 .
  • the housing 11 includes a motor housing for housing the motor 12 , a transmission housing for housing at least part of the transmission assembly 14 , and an output housing for housing at least part of the output assembly 13 .
  • the motor 12 includes a drive shaft 121 that is rotatable about the first axis 101 .
  • the output assembly 13 includes an output shaft 131 for connecting the working accessory 20 and driving the working accessory 20 to swing.
  • the motor is specifically a motor.
  • the motor 12 will be used instead of the motor below, but this does not limit this application.
  • the working attachment 20 is a cutting saw blade.
  • the working accessory 20 is one of a slotting saw blade with serrations on the front end, a cutting saw blade with serrations on the side, a sanding disc with a sanding surface, a slicing blade, a grinding blade, and a cutting knife. Or several.
  • the transmission assembly 14 connects the motor 12 and the output shaft 131 and transmits the power of the motor 12 to the output shaft 131 .
  • the transmission assembly 14 converts the rotational motion output by the drive shaft 121 into the rotation and reciprocating swing motion of the output shaft 131 .
  • the transmission assembly 14 transmits the rotation of the motor 12 to the output shaft 131, so that the output shaft 131 rotates around the output axis 104 and drives the working attachment 20 to reciprocate.
  • the output axis 104 is perpendicular to the first axis 101 .
  • the transmission assembly 14 includes a first bearing 15 , a shift fork 16 , a second bearing 17 and an eccentric member 18 .
  • the first bearing 15 is used to support the driving shaft 121.
  • the shift fork 16 is used to support the output shaft 131 .
  • the second bearing 17 is used to drive the shift fork 16 to produce reciprocating swing.
  • the eccentric member 18 includes a central portion 181 connected to the first bearing 15 and an eccentric portion 182 connected to the second bearing 17 .
  • the axis of the eccentric portion 182 is eccentrically arranged relative to the axis of the central portion 181 .
  • the axis of the central part 181 is the second axis 102
  • the axis of the eccentric part 182 is the third axis 103 .
  • the eccentricity between the second axis 102 and the third axis 103 is e.
  • the shift fork 16 includes a first support part 161 connected to the second bearing 17 and a second support part 162 connected to the output shaft 131 .
  • the first support part 161 is used to contact the second bearing 17 and be driven by the second bearing 17 to produce back-and-forth swing.
  • the first support part 161 includes two swing claws 1611 , and the two swing claws 1611 are provided on the left and right sides of the second bearing 17 .
  • the second support part 162 is fixedly connected to the output shaft 131, and the whole body formed by the second support part 162 and the output shaft 131 can swing back and forth within a swing angle range with the output axis 104 as the axis.
  • the shift fork 16 will swing with the output axis 104 as the axis, so that the shift fork 16 drives the output shaft 131 to swing within a range of swing angles.
  • Multifunctional tool 100 also includes an adjustment assembly 19 .
  • the adjusting assembly 19 is used to adjust the transmission assembly.
  • the adjustment component 19 is configured such that when the load of the output shaft 131 meets the preset value of the adjustment component 19, the adjustment component 19 controls the transmission component 14 to adjust the output shaft 131 to drive the working attachment 20 to reciprocate at a corresponding angle.
  • the adjusting component 19 switches the working mode of the transmission component 14 according to the load condition of the output shaft 131 .
  • the adjustment component 19 is provided with a predetermined value.
  • the predetermined value here is related to the load value of the output shaft 131 .
  • the transmission assembly 14 When the motor 12 rotates in the first rotation direction, that is, the motor rotates forward, and the value of the load on the output shaft 131 reaches a predetermined value, the transmission assembly 14 begins to switch between different working modes.
  • the transmission assembly 14 of the multifunctional tool 100 includes different working modes corresponding to different output swing angles, thereby being compatible with more usage conditions. For example, when the workpiece is like wood When the hardness of the material is low, the output shaft 131 can output a commonly used smaller swing angle. When the hardness of the workpiece such as wooden material is high, the wood chips are not easily discharged at a smaller swing angle, so that the work accessory 20 such as a saw blade is easily stuck, so the output shaft 131 needs to output a larger swing angle.
  • the output shaft 131 When the saw blade is stuck or the swing is blocked, the output shaft 131 will receive force in the opposite direction. At this time, the load on the output shaft 131 becomes larger.
  • the corresponding preset value is set according to the load condition of the output shaft 131 through the adjusting component 19.
  • the swing angle of the working accessory driven by the output shaft 131 is automatically adjusted, and the transmission assembly 14 can convert the working mode, thereby adjusting the output swing angle, without the user having to switch the working mode themselves, realizing adaptive adjustment of the multi-function tool.
  • the output swing angle is convenient for user operation.
  • the output shaft 131 drives the working attachment 20 to reciprocate at different swing angles. Since the shift fork 16 is driven by the second bearing 17 to rotate and swing back and forth around the output axis 104, the swing angle of the shift fork 16 is affected by the eccentricity of the axis of the second bearing 17 relative to the line of the drive shaft 121, and is related to the axis of the second bearing 17. The value of eccentricity is proportional to the size. When the second bearing 17 changes between two different eccentricities relative to the drive shaft 121, the shift fork 16 can drive the output shaft 131 to output two different swing angles.
  • the first bearing 15 includes a central hole 151 for connecting the drive shaft 121 and a first eccentric hole 152 provided with an eccentric distance from the central hole 151 .
  • the central portion 181 of the eccentric member 18 is connected to the first eccentric hole 152 .
  • the axis of the central hole 151 coincides with the axis of the driving shaft 121 , that is to say, the axis of the central hole 151 is the first axis 101 .
  • the axis of the central hole 151 may be parallel to the drive shaft 121 but not coincident.
  • the axis of the first eccentric hole 152 coincides with the axis of the central portion 181 of the eccentric member 18 , that is to say, the axis of the first eccentric hole 152 is the second axis 102 .
  • the axis of the first eccentric hole 152 is parallel to and does not coincide with the axis of the central portion 181 of the eccentric member 18 .
  • the same vertical plane is set so that the first axis 101, the second axis 102 and the third axis 103 are all projected into this vertical plane.
  • the eccentricity between the first axis 101 and the second axis 102 is a. Since the eccentricity is the distance between the axis of the central hole 151 of the first bearing 15 and the axis of the first eccentric hole 152, the size of a is fixed.
  • the eccentricity between the second axis 102 and the third axis 103 is e. This eccentricity is the distance between the axis of the center portion 181 of the eccentric member 18 and the axis of the eccentric portion 182, so the size of e is fixed.
  • the eccentricity between the first axis 101 and the third axis 103 is c.
  • This eccentricity is the distance between the axis of the central hole 151 of the first bearing 15 and the axis of the eccentric portion 182, so the size of c is variable.
  • the corresponding three points of the three straight lines form a triangle.
  • the second bearing 17 drives the eccentric member 18 to swing back and forth with a prescribed stroke using the second axis 102 as the rotation axis.
  • the three-axis 103 rotates with the second axis 102 as the axis of rotation to achieve changes in the size of c.
  • the transmission assembly 14 is set to different working modes.
  • the output shaft 131 drives the working accessory 20 to swing back and forth at different swing angles.
  • the transmission assembly 14 is set to be in the first working mode.
  • the transmission assembly 14 is set to be in the second working mode.
  • the transmission assembly 14 is in the first working mode, and the eccentricity c1 between the first axis 101 and the third axis 103 is. As shown in Figure 7, the transmission assembly 14 is in the second working mode, and the eccentricity c2 between the first axis 101 and the third axis 103, c1, is smaller than c2.
  • the adjustment assembly 19 includes a first biasing element 191 .
  • the first biasing element 191 applies a biasing force close to the drive shaft 121 to the eccentric member 18 so as to bias the eccentric member 18 in a direction close to the drive shaft 121 .
  • the eccentric member 18 drives the shift fork 16 to move, it will also receive a reaction force, and the reaction force will cause the eccentric member 18 to exert a first pressure away from the drive shaft 121 towards the first biasing element 191 .
  • the first pressure is less than or equal to the bias force, the transmission assembly 14 is in the first working mode, that is, small swing angle output.
  • the transmission assembly 14 starts to switch from the first working mode to the second working mode, and the eccentric member 18 is driven by the shift fork 16 and the second bearing 17 to start rotating with the second axis 102 as the rotation axis. In this embodiment, it is clockwise rotation. Then the first biasing element 191 is biased to increase the biasing force.
  • the eccentric member 18 stops the second axis 102 from rotating as the rotating shaft and maintains it at the current position. At this time, the eccentricity between the first axis 101 and the third axis 103 may be between c1 and c2, or the eccentricity between the first axis 101 and the third axis 103 may be c2.
  • the eccentric member 18 When the eccentric member 18 rotates to the position of the transmission assembly 14 in the second working mode, it stops rotating.
  • the transmission assembly 14 is in the second working mode, if the first pressure is less than the biasing force, the first biasing element 191 drives the eccentric member 18 to start rotating in the opposite direction with the second axis 102 as the rotation axis. In this embodiment, it is counterclockwise rotation.
  • the adjustment component 19 is based on the relationship between the value of the reverse force on the output shaft 131 and the predetermined value. The process of switching the transmission assembly 14 between the first working mode and the second working mode is optionally limited to ensure that the working mode matches the operating conditions, and at the same time, the working accessory 20 and the motor 12 can be protected.
  • the first biasing element 191 is a torsion spring sleeved between the eccentric portion 182 and the first eccentric hole 152 .
  • a first limiting portion 1521 is formed on the first eccentric hole 152
  • a second limiting portion 1821 is formed on the eccentric portion 182 .
  • the first eccentric hole 152 also has a first groove 1522, and the torsion spring is installed in the first groove 1522. The end abuts or is fixedly connected to the first groove 1522. The second end of the torsion spring is fixed in the second limiting part 1821.
  • the second end of the torsion spring abuts against the first wall of the first limiting portion 1521 .
  • the second end of the torsion spring abuts against the second wall of the first limiting part 1521 , and the first limiting part 1521 and the second limiting part 1821 limit the eccentric member 18 to
  • the second axis 102 is the reciprocating swing stroke of the rotating shaft.
  • a third limiting portion is provided between the first bearing 15 and the eccentric member 18 for limiting the axial displacement of the eccentric member 18 .
  • a limiting hole is opened in the central hole 151 in a direction perpendicular to the first axis 101 .
  • the central axis of the eccentric member 18 is circumferentially opened with a limiting groove matched with the limiting hole.
  • a limiting pin is used across the limiting hole and the limiting groove, so that the limiting pin limits the axial displacement of the eccentric member 18 without affecting the axial rotation of the eccentric member 18 .
  • FIGS. 8 and 9 it is a power tool according to another embodiment of the present application.
  • the difference between this power tool and the first embodiment is that the transmission assembly has different structures that realize different swing angles. Among them, the same components as those in the first embodiment will continue to use the reference numbers in the first embodiment.
  • the first bearing 25 includes a central hole for connecting the motor shaft.
  • the eccentric member 28 includes a central portion 281 connected to the first bearing 25 and an eccentric portion 282 connected to the second bearing 27 .
  • the axis of the eccentric portion 282 is eccentrically arranged relative to the axis of the central portion 281 .
  • the axis of the central portion 281 is the second axis 202 .
  • the axis of the eccentric portion 282 is the third axis 203 .
  • the central portion 281 of the eccentric member 28 is connected to the central hole.
  • a receiving hole 2811 coaxial with the central portion 281 is opened in the center of the central portion 281 of the eccentric member 28 .
  • the central part 281 is inserted into the central hole, and the driving shaft (not shown in the figure) is inserted into the receiving hole 2811.
  • the first axis 201 and the second axis 202 coincide.
  • the second axis 202 is parallel to the third axis 203 and the eccentricity between them is e.
  • the second bearing 27 is slidably connected to the eccentric portion 282 along the axis of the eccentric portion 282 , that is, the third axis 203 .
  • the second bearing 27 reciprocates back and forth relative to the output shaft along the axis of the eccentric portion 282 with a prescribed stroke.
  • the shift fork 26 includes a first support part 261 connected to the second bearing 27 and a second support part connected to the output shaft 231 .
  • the first support part 261 is used to contact the second bearing 27 and be driven by the second bearing 27 to produce back-and-forth swing.
  • the first support part 261 includes two swing claws 2611 , and the two swing claws 2611 are provided on the left and right sides of the second bearing 27 .
  • the second bearing 27 is a ball bearing, and the second bearing 27 has an outer ring and an inner ring.
  • the outer ring has a spherical outer surface, and the inner ring is set on the eccentric part 282.
  • the swing pawl has a substantially planar inner wall, and the inner wall is in close sliding contact with the outer surface of the outer ring.
  • the transmission assembly can be converted between different working modes through the cooperation of the shift fork 26 and the second bearing 27.
  • the output shaft 231 can output different swing angles a.
  • the transmission assembly is in the first working mode.
  • the second bearing 27 cooperates with the rear end of the first support part 161 of the shift fork 26.
  • the horizontal distance from the center line of the second bearing 27 to the output axis 204 is D1.
  • the output shaft 231 has a swing angle a1.
  • the transmission assembly is in the second working mode.
  • the center line of the second bearing 27 matches the front end of the first support part 161 of the shift fork 26, and the horizontal distance between the second bearing 27 and the output axis 204 is D2.
  • the output shaft 231 has a swing angle a2.
  • the horizontal distance between the second bearing 27 and the output axis 204 gradually decreases from D1 to D2.
  • the swing angle of the output shaft 231 gradually decreases from a1 Increase to a2.
  • the adjustment assembly 29 includes a biasing element 291 .
  • the biasing element 291 applies a biasing force to the second bearing 27 away from the drive shaft, so that the second bearing 27 is biased in a direction away from the drive shaft 121 .
  • the second bearing 27 drives the shift fork to move, it will also receive a reaction force, and the reaction force will cause the second bearing 27 to apply pressure close to the drive shaft to the biasing element 291 .
  • the transmission component is in the first working mode, that is, small swing angle output.
  • the biasing element 291 is biased to increase the biasing force.
  • the second bearing 27 stops sliding and remains at the current position.
  • the biasing element 291 drives the second bearing 27 to start moving in the opposite direction.
  • the adjustment component 29 optionally limits the switching process of the transmission component 14 between the first working mode and the second working mode, ensuring that the working mode matches the operating conditions and at the same time protecting the work. Attachment 20 and motor 12.
  • the biasing element 291 is a compression spring sleeved on the eccentric portion 282 .
  • other forms of springs or resettable elastic elements may also be used.
  • an included angle is set between the third axis and the first axis, so that the moving distance of the second bearing is shortened when the swing range of the output swing angle of the output shaft remains unchanged.
  • the angle between the third axis and the first axis is greater than or equal to 0° and less than or equal to 5°.
  • the included angle is greater than or equal to 0° and less than or equal to 3°.
  • the included angle is greater than or equal to 1° and less than or equal to 3°. In some embodiments, the included angle is 1.5°.
  • the transmission assembly also includes a balance mass 283.
  • the center of gravity of the balance mass 283 is at the same position as the center of gravity of the eccentric member 28. on both sides of the first axis 201.
  • FIG. 10 and FIG. 11 it is a power tool according to the third embodiment of the present application.
  • the difference between this power tool and the first and second embodiments is that the drive transmission assembly has different structures to achieve different swing angles.
  • the multifunctional tool 300 also includes an operating component 39, which is used to control the start and stop of the motor, the operating status of the motor, and drive the transmission component to switch between the first working mode and the second working mode.
  • an operating component 39 which is used to control the start and stop of the motor, the operating status of the motor, and drive the transmission component to switch between the first working mode and the second working mode.
  • the operating component 39 includes a trigger part 391 provided outside the housing for operation and a connecting part 392 connected to the transmission component.
  • the trigger part 391 forms or is connected to the connection part 392.
  • the connection part 392 is driven to switch the transmission assembly between the first working mode and the second working mode.
  • a ring sleeve 393 connected to the second bearing 27 is provided on the side of the connecting portion 392 close to the transmission assembly.
  • the connecting portion 392 can also be connected to the second bearing 27 or the eccentric portion through other structures, as long as the user-operated triggering portion 391 can drive the second bearing 37 to move.
  • the motor 12 includes a stator and a rotor.
  • the motor 12 is a three-phase brushless motor that includes a rotor with permanent magnets and three-phase stator windings U, V, W that are electronically commutated.
  • the three-phase stator windings U, V, and W are connected in a star shape, and in other embodiments, the three-phase stator windings U, V, and W are connected in an angular shape.
  • Brushless motors may include fewer or more than three phases.
  • the control circuit of the power tool 300 includes a drive circuit 371 and a controller 37 .
  • the driving circuit 371 is electrically connected to the stator windings U, V, and W of the motor 12 and is used to transfer the current from the power supply device 30 to the stator windings U, V, and W to drive the motor 12 to rotate.
  • the driving circuit 371 includes a plurality of switching elements Q1, Q2, Q3, Q4, Q5, Q6.
  • the gate terminal of each switching element is electrically connected to the controller for receiving control signals from the controller.
  • the drain or source of each switching element is connected to the stator windings U, V, W of the motor 12 .
  • the switching elements Q1 - Q6 receive control signals from the controller to change their respective conduction states, thereby changing the current loaded by the power supply device 30 on the stator windings U, V, and W of the motor 12 .
  • the driver circuit 371 may be a three-phase bridge driver circuit including six controllable semiconductor power devices (e.g., FETs, BJTs, IGBTs, etc.).
  • the above-mentioned switching element can also be any other type of solid-state switch, such as an insulated gate bipolar transistor (IGBT), a bipolar junction transistor (BJT), etc.
  • connection portion 392 is also connected to the drive circuit 371 of the motor 12, including but not limited to mechanical connection or electrical connection. By operating the trigger part 391, the connection part 392 is driven to start or stop the motor 12.
  • the operating assembly 39 and the housing include a plurality of selectively lockable limiting portions, including But it is not limited to snap fit, rod groove or hook groove fit, etc.
  • the operating component 39 includes a plurality of preset positions at which the operating member can be stopped.
  • the plurality of preset positions respectively correspond to the working mode of the transmission component and the working state of the motor. In this embodiment, it may include an on/off position, a first working mode position and a second working mode position.
  • the controller 37 adjusts the output speed of the motor according to the preset position of the operating component 39 .
  • the connecting part 392 is connected to the controller.
  • the triggering part 391 is operated to drive the connecting part 392 so that the transmission assembly switches between the first working mode and the second working mode
  • the connecting part 392 simultaneously passes through A controller regulates the motor speed.
  • the analog signals output are different.
  • the output analog signal is positively correlated with the duty cycle of the PWM signal of the motor 12
  • the duty cycle of the PWM signal is positively correlated with the rotational speed of the motor 12 relation.
  • the power tool 300 stores a mapping relationship between the position of the operating component 39 and the PWM signal.
  • the mapping relationship may be linear or nonlinear, which is not limited in the embodiments of the present application. .
  • the operating component 39 includes a second motor connecting a connecting portion 392 of the transmission component and a driving connecting portion 392, a second control circuit corresponding to the second motor, and the connecting portion 392 forms or is connected to a second motor of the second motor. on the motor shaft.
  • the operating member also includes a trigger portion 391 provided outside the housing for operation, and the trigger portion 391 is used to input a control signal to the second motor.
  • the trigger part 391 is a trigger switch.
  • the second motor is connected to the motor. According to the working state of the motor, the second motor drives the connecting part 392 to move to switch the transmission assembly between the first working mode and the second working mode. Specifically, the second motor uses a sensor to detect or identify the output speed of the motor, and matches different working modes based on different output speeds of the motor.
  • the second motor is connected to the output shaft 331.
  • the second motor drives the connecting portion 392 to move according to the magnitude of the reverse force in the output shaft 331, so that the transmission assembly operates in the first working mode. when switching between the second working mode.

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Abstract

一种动力工具，包括：传动组件，用于在马达和输出组件之间实现动力的传递以带动输出轴往复摆动；调节组件，用于调节传动组件；调节组件被配置为当输出轴的负载满足调节组件的预设值时，调节组件根据输出轴的负载控制传动组件，以使传动组件调节工作附件的摆动角度。

Description

动力工具
本申请要求申请日为2022年6月10日、申请号为202210649700.8，申请日为2023年4月21日、申请号为202310443426.3及申请日为2023年4月21日、申请号为202320919154.5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，例如涉及一种摆动类动力工具。
背景技术
摆动类多功能工具作为一种动力工具,多功能工具通常通过摆动件带动工作附件摆动实现对物体的切割、磨削等操作。
摆动类多功能工具的摆角近年来有增大趋势，相关技术中，工具的摆角从的±1.4°增大到±1.8°和±2.0°，甚至到±2.5°；摆角增大能提升作业效率。在加工材料比较容易切割时，使用较小的摆角，可以提高加工精细度。
发明内容
本申请提供了一种动力工具，能够自动适应不同工况。
本申请一实施例提供了一种动力工具，包括：马达，包括绕第一轴线转动的驱动轴；输出组件，包括以输出轴线为中心的输出轴；工作附件，被所述输出轴驱动进行往复摆动；传动组件，用于在所述马达和所述输出组件之间实现动力的传递以带动所述输出轴往复摆动；及调节组件，用于调节所述传动组件；所述调节组件被配置为当所述输出轴的负载满足所述调节组件的预设值时，所述调节组件根据所述输出轴的负载控制所述传动组件，以使所述传动组件调节所述工作附件的摆动角度。
在一些实施例中，所述传动组件，包括：第一轴承，用于支撑所述驱动轴，拨叉，用于支撑所述输出轴，第二轴承，用于驱动所述拨叉产生往复摆动，偏心构件，包括连接所述第一轴承的中心部和连接所述第二轴承的偏心部。
在一些实施例中，所述偏心部的轴线相对于所述中心部的轴线偏心设置。
在一些实施例中，所述传动组件设置不同的工作模式，所述传动组件处于不同的所述工作模式时，所述输出轴驱动所述工作附件以不同的角度往复摆动。
在一些实施例中，当所述传动组件在不同的所述工作模式间切换时，所述偏心部的轴线与所述第一轴线具有不同的偏心距。
在一些实施例中，所述第一轴承包括：用于连接所述驱动轴的中心孔和与所述中心孔设置有偏心距的第一偏心孔，所述第一偏心孔的中心线为第二轴线，所述偏心构件的中心部与所述第一偏心孔连接。
在一些实施例中，当所述传动组件在所述工作模式间切换时，所述第二轴承驱动所述偏心构件以所述第二轴线为转轴以规定行程往复摆动。
在一些实施例中，所述调节组件包括：第一偏压元件，所述第一偏压元件支撑所述偏心构件，向所述偏心构件施加偏压力，以使所述偏心构件向靠近所述驱动轴的方向偏压。
在一些实施例中，当所述输出轴受到负载时，所述偏心构件向所述第一偏压元件施加远离所述驱动轴的第一压力。
在一些实施例中，所述第一压力大于所述偏压力时，所述偏心构件向远离所述驱动轴方向运动。
在一些实施例中，所述第二轴承沿所述偏心部的轴线滑动连接至所述偏心部上，所述第二轴承以规定行程沿所述偏心部的轴线相对于所述输出轴前后往复滑动。
在一些实施例中，所述偏心部的轴线与所述第一轴线偏心距不变。
在一些实施例中，所述拨叉包括：与所述第二轴承连接的第一支撑部，所述第一支撑部沿所述第一轴线延伸。
在一些实施例中，所述传动组件调节所述工作附件的摆动角度时，所述第二轴承被驱动与所述第一支撑部不同位置配合。
在一些实施例中，所述偏心部的轴线与所述第一轴线之间设置有夹角，所述夹角大于等于0°小于等于5°。
一种动力工具，包括：马达，包括绕第一轴线转动的驱动轴；输出组件，包括以输出轴线为中心的输出轴；及工作附件，被所述输出轴驱动进行往复摆动；所述输出组件根据所述输出轴的负载不同，所述输出组件驱动的所述工作附件以不同的角度摆动。
一种动力工具，包括：马达，包括绕第一轴线转动的驱动轴；输出组件，包括以输出轴线为中心的输出轴；工作附件，被所述输出轴驱动进行往复摆动；所述动力工具还包括：及调节组件，所述调节组件被配置为根据所述输出轴的 负载调节所述输出轴驱动的所述工作附件的摆动角度。
在一些实施例中，所述动力工具还包括：传动组件，用于在所述马达和所述输出组件之间实现动力的传递以带动所述输出轴往复摆动，所述传动组件包括：第一轴承，用于支撑所述驱动轴，拨叉，用于支撑所述输出轴，第二轴承，用于驱动所述拨叉产生往复摆动，偏心构件，包括连接所述第一轴承的中心部和连接所述第二轴承的偏心部。
在一些实施例中，当调节所述输出轴驱动的所述工作附件的摆动角度时，所述第二轴承驱动所述偏心构件以所述第二轴线为转轴以规定行程往复摆动。
在一些实施例中，所述调节组件包括：第一偏压元件，所述第一偏压元件支撑所述偏心构件，向所述偏心构件施加偏压力，以使所述偏心构件向靠近所述驱动轴的方向偏压。
一种动力工具，包括：马达，包括绕第一轴线转动的驱动轴；输出组件，包括以输出轴线为中心的输出轴；工作附件，被所述输出轴驱动进行往复摆动；传动组件，用于在所述马达和所述输出组件之间实现动力的传递以带动所述输出轴往复摆动，所述传动组件设置不同的工作模式，所述传动组件处于不同的所述工作模式时，所述输出轴驱动所述工作附件以不同的角度往复摆动；操作组件，用于控制所述马达并驱动所述传动组件在多个所述工作模式间切换。
在一些实施例中，所述动力工具还包括：外壳，所述外壳设有容纳腔，所述马达至少部分设置在所述容纳腔中，所述操作组件，包括设置在所述外壳外部供操作的触发部和连接所述传动组件的连接部，所述触发部形成或连接于所述连接部，通过操作所述触发部带动所述连接部，以使所述传动组件在所述工作模式间切换。
在一些实施例中，所述连接部与所述马达的驱动电路连接，通过操作所述触发部带动所述连接部启动或关闭所述马达。
在一些实施例中，所述操作组件包括多个可止位所述触发部的预设位置，多个所述预设位置分别对应所述传动组件的工作模式和所述马达的工作状态。
在一些实施例中，所述动力工具还包括，控制器，所述控制器根据所述操作组件所处的预设位置调节所述马达的输出转速。
在一些实施例中，所述动力工具还包括，控制器，所述连接部与所述控制器连接，通过操作所述触发部带动所述连接部以使所述传动组件在所述工作模式间切换时，所述连接部同时通过所述控制器调节所述马达转速。
在一些实施例中，所述传动组件，包括：第一轴承，用于支撑所述驱动轴，拨叉，用于支撑所述输出轴，第二轴承，用于驱动所述拨叉产生往复摆动，偏心构件，包括连接所述第一轴承的中心部和连接所述第二轴承的偏心部，其中，偏心部的轴线相对于中心部的轴线偏心设置。
在一些实施例中，所述第二轴承沿所述偏心部的轴线滑动连接至所述偏心部上，所述操作组件驱动所述第二轴承以规定行程沿所述偏心部的轴线相对于所述输出轴前后往复滑动。
在一些实施例中，所述拨叉包括：与所述第二轴承连接的第一支撑部，所述第一支撑部沿所述第一轴线延伸，当所述传动组件在所述工作模式间切换时，所述第二轴承被驱动与所述第一支撑部不同位置配合。
在一些实施例中，所述连接部与所述第二轴承连接。
附图说明
图1是本申请中的第一实施例的结构图；
图2是图1中的第一实施例的剖视图；
图3是图1中的第一实施例去除外壳的爆炸图；
图4是第一轴承的剖视图；
图5是偏心构件的剖视图；
图6是图1中第一实施例中传动组件处于第一工作模式时的部分放大图；
图7是图1中第一实施例中传动组件处于第二工作模式时的部分放大图；
图8是本申请的第二实施例的传动组件位于第一工作模式的示意图；
图9是本申请的第二实施例的传动组件位于第二工作模式的示意图；
图10是本申请的第三实施例的结构图；
图11是本申请的第三实施例的内部结构图；
图12是本申请的一种实施例的电路框图。
具体实施方式
以下结合附图和具体实施例对本申请作具体的介绍。
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间 媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
为了清楚的说明本申请的技术方案，还定义了如图1所示的上侧、下侧、前侧和后侧。
如图1至图7示出了本申请的第一实施例的动力工具，该动力工具为一种多功能工具100，动力工具为一种摆动类工具。在其他可替换实施例中，该摆动类工具可安装不同的工作附件20，例如三角砂、铲刀、金属锯片、木工锯片、金刚砂锯片等，通过这些不同的工作附件20能够使得动力工具100实现锯切、砂磨、锉磨以及铲切等的功能。
如图1示出了本申请的一个实施例的多功能工具100。多功能工具100包括电源装置30。其中，电源装置30用于为多功能工具100提供电能。在本实施例中，电源装置30为电池包，电池包配合相应的电源电路，为多功能工具100内的相应部件供电。例如，电池包可为锂电池包、固态电池包或软包电池包。在一些实施例中，电池包的标称电压为10.8V、24V、36V、48V、56V或80V。
本领域技术人员应当理解，电源装置30并不限于使用电池包的场景，还可通过市电、交流电源，配合相应的整流、滤波和调压电路，实现对机内的相应部件供电。
如图1至图7所示，多功能工具100包括外壳11、马达12、输出组件13和传动组件14。其中，外壳11包括用于容纳马达12的马达壳体、容纳至少部分传动组件14的传动壳体以及容纳至少部分输出组件13的输出壳体。马达12包括能够以第一轴线101为轴转动的驱动轴121。输出组件13包括用于连接工作附件20并驱动工作附件20摆动的输出轴131。在本实施例中，马达具体为电机，下文将用电机12代替马达，但并不能作为对本申请的限制。
本实施例中，工作附件20为切割锯片。在一些实施例中，工作附件20为前端设有锯齿的开槽锯片、侧边设有锯齿的切割锯片、设有砂光面的砂光盘、切片、打磨片、割刀中的一种或几种。
传动组件14连接电机12和输出轴131并将电机12的动力传递至输出轴131。同时，传动组件14将驱动轴121输出的旋转运动转换为输出轴131的旋转及往复摆动运动。在本实施例中，传动组件14将电机12的转动传递至输出轴131，使得输出轴131绕输出轴线104转动并驱动工作附件20往复摆动。本实施例中，输出轴线104垂直于第一轴线101。
如图3至图5所示，传动组件14包括第一轴承15、拨叉16、第二轴承17和偏心构件18。其中，第一轴承15用于支撑驱动轴121。拨叉16用于支撑输出轴131。第二轴承17用于驱动拨叉16产生往复摆动。偏心构件18包括连接第一轴承15的中心部181和连接第二轴承17的偏心部182。其中，偏心部182的轴线相对于中心部181的轴线偏心设置。中心部181的轴线为第二轴线102，偏心部182的轴线为第三轴线103。在本实施例中，第二轴线102与第三轴线103之间偏心距为e。
拨叉16包括与第二轴承17连接的第一支撑部161和与输出轴131连接的第二支撑部162。在本实施例中，第一支撑部161用于与第二轴承17接触且被第二轴承17驱动进而产生来回摆动。第一支撑部161包括两个摆爪1611，两个摆爪1611设置在第二轴承17的左右两侧。当第二轴承17被驱动轴121驱动旋转时，由于偏心构件18产生的偏心结构，第二轴承17将会在左右方向上往复撞击两个摆爪1611。第二支撑部162与输出轴131构成固定连接，第二支撑部162和输出轴131构成的整体能以输出轴线104为轴在一个摆动角度范围内往复摆动。当两个摆爪1611被第二轴承17撞击时，拨叉16将会以输出轴线104为轴摆动，从而拨叉16带动输出轴131在一个摆动角度的范围内摆动。
多功能工具100还包括调节组件19。调节组件19用于调节传动组件。调节组件19被配置为当输出轴131的负载满足调节组件19的预设值时，调节组件19控制传动组件14调节输出轴131驱动工作附件20以相应的角度进行往复摆动。调节组件19根据输出轴131的负载情况来切换传动组件14的工作模式。在本实施例中，调节组件19设置有预定值。此处的预定值与输出轴131的负载值相关。在电机12以第一旋转方向旋转即电机正转，输出轴131负载的数值达到预定值时，传动组件14开始在不同的工作模式间切换。多功能工具100的传动组件14包括不同的工作模式对应不同的输出摆角，进而可以兼容更多的使用工况。例如当工件如木 质材料的硬度较低时，输出轴131输出常用较小摆动角度即可。当工件如木质材料的硬度较高时，在较小的摆动角度下，木屑不容易排出，从而使工作附件20如锯片很容易被卡住，因此需要输出轴131输出较大的摆动角度。当锯片被卡住或摆动受阻时，输出轴131会逆向受力，此时输出轴131负载变大，通过调节组件19根据输出轴131负载情况设置相应的预设值,当输出轴131负载超过预设值时，自动调节输出轴131驱动的工作附件的摆动角度，传动组件14即可进行工作模式转换，进而调节输出摆角，不需要用户自行切换工作模式，实现多功能工具自适应调节输出摆角，方便用户操作。
通过使偏心部182的轴线即第三轴线103与驱动轴121线即第一轴线101具有至少两个不同的偏心距，以使输出轴131驱动工作附件20往复摆动的以摆动角度不同。由于拨叉16是受第二轴承17的驱动围绕输出轴线104旋转往复摆动,因此,拨叉16的摆动角度受第二轴承17的轴线相对于驱动轴121线的偏心距的影响,并与该偏心距的值的大小成正比。当第二轴承17相对于驱动轴121在两个不同的偏心距间变化时,能够使拨叉16带动输出轴131输出两种不同的摆动角度。
在本实施例中，第一轴承15包括用于连接驱动轴121的中心孔151和与中心孔151设置有偏心距的第一偏心孔152。偏心构件18的中心部181与第一偏心孔152连接。中心孔151的轴线与驱动轴121的轴线重合，即是说，中心孔151的轴线为第一轴线101。在其他可替换实施例中，中心孔151的轴线也可以与驱动轴121平行不重合。第一偏心孔152的轴线与偏心构件18的中心部181的轴线重合，即是说，第一偏心孔152的轴线为第二轴线102。在其他可替换实施例中，第一偏心孔152的轴线与偏心构件18的中心部181的轴线平行不重合。
如图6-7所示，设定同一竖直平面，使第一轴线101、第二轴线102和第三轴线103均投影于此竖直平面内。其中，第一轴线101与第二轴线102之间的偏心距为a。由于此偏心距为第一轴承15的中心孔151的轴线和第一偏心孔152的轴线之间的距离，所以a的大小固定不变。第二轴线102与第三轴线103之间偏心距为e。此偏心距为偏心构件18的中心部181的轴线和偏心部182的轴线之间的距离，所以e的大小固定不变。第一轴线101与第三轴线103之间的偏心距为c，此偏心距为第一轴承15的中心孔151的轴线和偏心部182的轴线之间距离，所以c的大小是可变的。在此竖直平面内，将三条直线的对应的三个点形成一个三角形，根据三角函数公式，当偏心距a与偏心距e之间的夹角变大，则偏心距c也变大。所以通过第二轴承17驱动偏心构件18以第二轴线102为转轴以规定行程往复摆动，第 三轴线103以第二轴线102为转轴旋转，以实现c的大小的变化。
在本实施例中，传动组件14设置不同的工作模式。传动组件14处于不同的工作模式时，输出轴131驱动工作附件20以不同的摆动角度往复摆动。为方便说明，在本实施例中，输出轴131以第一角度驱动工作附件20往复摆动时，设定传动组件14处于第一工作模式。输出轴131以第二角度驱动工作附件20往复摆动时，设定传动组件14处于第二工作模式。
如图6所示，传动组件14处于第一工作模式,第一轴线101与第三轴线103之间的偏心距c1。如图7所示，传动组件14处于第二工作模式,第一轴线101与第三轴线103之间的偏心距c2，c1小于c2。
在本实施例中，调节组件19包括第一偏压元件191。第一偏压元件191向偏心构件18施加靠近驱动轴121的偏压力，以使偏心构件18向靠近驱动轴121的方向偏压。偏心构件18驱动拨叉16运动时，也会受到反作用力，该反作用力会使偏心构件18向第一偏压元件191施加远离驱动轴121的第一压力。当第一压力小于等于偏压力时，传动组件14处于第一工作模式，即小摆角输出。当第一压力大于偏压力时，传动组件14处于开始从第一工作模式向第二工作模式切换，偏心构件18受拨叉16和第二轴承17驱动开始以第二轴线102为转轴旋转。在本实施例中，为顺时针旋转。进而偏压第一偏压元件191，使偏压力增大，当第一压力等于偏压力时，偏心构件18停止第二轴线102为转轴旋转，并保持在当前的位置。此时的第一轴线101与第三轴线103之间的偏心距可以在c1至c2之间，也可能第一轴线101与第三轴线103之间的偏心距为c2。当偏心构件18旋转至传动组件14在第二工作模式时的位置后，停止旋转。当传动组件14在第二工作模式时，若第一压力小于偏压力，第一偏压元件191驱动偏心构件18开始以第二轴线102为转轴往相反方向旋转。在本实施例中，为逆向时针旋转。当偏心构件18复位至传动组件14在第一工作模式时的位置后，停止旋转。调节组件19根据输出轴131逆向受力的数值与预定值关系。可选择的限制传动组件14在第一工作模式和第二工作模式间切换的过程，保证工作模式与使用工况相配，同时可以保护工作附件20和电机12。
在本实施例中，第一偏压元件191为套设在偏心部182和第一偏心孔152之间的扭簧。在其他实施例中，也可以为其他形式的弹簧或可复位的弹性元件。第一偏心孔152上开设有第一限位部1521，在偏心部182上开设有第二限位部1821。第一偏心孔152还开着有第一凹槽1522，扭簧安装在第一凹槽1522中，扭簧的一 端抵接或固定连接在第一凹槽1522上。扭簧的第二端固定在第二限位部1821内。当传动组件14在第一工作模式，扭簧的第二端抵接在第一限位部1521的第一壁上。当传动组件14在第二工作模式，扭簧的第二端抵接在第一限位部1521的第二壁上，第一限位部1521和第二限位部1821限制了偏心构件18以第二轴线102为转轴往复摆动的行程。
第一轴承15与所述偏心构件18之间设置第三限位部，用于限制偏心构件18的轴向位移。在本实施例中，在中心孔151上沿垂直于第一轴线101的方向开设限位孔。偏心构件18的中心轴沿周向开设于限位孔配合的限位槽。使用限位销横跨限位孔和限位槽，以使限位销在限制偏心构件18的轴向位移的同时不影响偏心构件18的轴向旋转。
如图8和图9所示，为本申请的另一个实施例的动力工具，该动力工具与第一实施例的区别为传动组件实现摆动角度不同的结构不同。其中，与第一实施例中相同的部件将继续沿用第一实施例中的标号。
如图8和图9所示，在本实施例中，使偏心部的轴线即第三轴线203与电机轴线即第一轴线201偏心距e不变时，通过调整第二轴承27与拨叉26的配合位置，即是改变第二轴承27与输出轴231的距离，进而实现输出摆动角度不同。
在本实施例中，第一轴承25包括用于连接电机轴的中心孔。偏心构件28，包括连接第一轴承25的中心部281和连接第二轴承27的偏心部282。其中，偏心部282的轴线相对于中心部281的轴线偏心设置。中心部281的轴线为第二轴线202。偏心部282的轴线为第三轴线203。偏心构件28的中心部281与连接至中心孔中。偏心构件28的中心部281的中心开设与中心部281同轴的容纳孔2811。中心部281插入中心孔中，驱动轴(图中未示出)插入容纳孔2811中。在本实施例中，安装后，第一轴线201和第二轴线202重合。第二轴线202与第三轴线203平行且之间偏心距为e。
第二轴承27沿偏心部282的轴线即第三轴线203滑动连接至偏心部282上。当传动组件在第一工作模式和第二工作模式间切换时，第二轴承27以规定行程沿偏心部282的轴线相对于输出轴前后往复滑动。
拨叉26包括与第二轴承27连接的第一支撑部261和与输出轴231连接的第二支撑部。在本实施例中，第一支撑部261用于与第二轴承27接触且被第二轴承27驱动进而产生来回摆动。第一支撑部261包括两个摆爪2611，两个摆爪2611设置在第二轴承27的左右两侧。第二轴承27为滚珠轴承,第二轴承27具有外圈和内圈, 其中,外圈具有球形外表面,内圈套设在偏心部282上。摆爪具有大致呈平面的内侧壁,内侧壁与外圈的外表面紧密地滑动接触。
传动组件可通过拨叉26和第二轴承27的配合在不同的工作模式之间转换,在不同的工作模式时,可使输出轴231输出不同的摆动角度a。如图8所示,传动组件位于第一工作模式,此时第二轴承27与拨叉26第一支撑部161的后端配合,第二轴承27的中心线到输出轴线204的水平距离为D1。此时输出轴231具有摆动角度a1。如图9所示,传动组件位于第二工作模式,此时第二轴承27中心线与拨叉26第一支撑部161的前端配合,第二轴承27到输出轴线204的水平距离为D2。此时输出轴231具有摆动角度a2。显然,当传动组件由第一工作模式移动至第二工作模式时,第二轴承27到输出轴线204的水平距离由D1逐渐减小为D2,相应地,输出轴231的摆动角度则由a1逐渐增大到a2。
在本实施例中，调节组件29包括偏压元件291。偏压元件291向第二轴承27施加远离驱动轴的偏压力，以使第二轴承27向远离驱动轴121的方向偏压。第二轴承27驱动拨叉运动时，也会受到反作用力，该反作用力会使第二轴承27向偏压元件291施加靠近驱动轴的压力。当压力小于等于偏压力时，传动组件处于第一工作模式，即小摆角输出。当压力大于偏压力时，传动组件处于开始从第一工作模式向第二工作模式切换。进而偏压偏压元件291，使偏压力增大，当压力等于偏压力时，第二轴承27停止滑动，并保持在当前的位置。当第二轴承27滑动到第二工作模式时的位置后，停止运动。当压力小于偏压力时，偏压元件291驱动第二轴承27开始往相反方向运动。当偏心构件复位至传动组件在第一工作模式时的位置后，第二轴承27停止运动。调节组件29根据输出轴131负载的数值与预定值关系，可选择的限制传动组件14在第一工作模式和第二工作模式间切换的过程，保证工作模式与使用工况相配，同时可以保护工作附件20和电机12。
在本实施例中，偏压元件291为套设在偏心部282的压簧。在其他实施例中，也可以为其他形式的弹簧或可复位的弹性元件。
作为本实施例的替换实施例，第三轴线与第一轴线之间设置夹角，以使输出轴的输出摆角的摆动范围不变的情况下，第二轴承移动距离缩短。在本实施例中，第三轴线与第一轴线之间设置夹角大于等于0°小于等于5°。在一些实施例中，夹角大于等于0°小于等于3°。在一些实施例中，夹角大于等于1°小于等于3°。在一些实施例中，夹角为1.5°。
传动组件还包括平衡块283，所述平衡块283的重心与偏心构件28的重心位 于第一轴线201的两侧。
如图10和图11所示，为本申请的第三实施例的动力工具，该动力工具与第一实施例和第二实施例的区别为驱动传动组件实现摆动角度不同的结构不同。
多功能工具300还包括操作组件39，操作组件39用于控制电机启停、电机运行状态并驱动传动组件在第一工作模式和第二工作模式间切换。
操作组件39包括设置在外壳外部供操作的触发部391和连接传动组件的连接部392。触发部391形成或连接与连接部392，通过操作触发部391带动连接部392以使所述传动组件在第一工作模式和第二工作模式间切换。
以第二实施例中的传动组件为例，连接部392靠近传动组件的一侧设有与第二轴承27连接的环套393。在其他可替换实施例中，连接部392也可以通过其他结构与第二轴承27、或偏心部连接，只要能实现用户操作触发部391可以驱动第二轴承37运动即可。
如图12所示，在本实施例中，电机12包括定子和转子。在一些实施例中，电机12为三相无刷电机，电机包括具有永磁体的转子和以电子方式换向的三相定子绕组U、V、W。在一些实施例中，三相定子绕组U、V、W之间采用星型连接，在另一些实施例中，三相定子绕组U、V、W之间采用角型连接。然而，必须理解的是其他类型的无刷电动机也在本申请的范围。无刷电动机可包括少于或多于三相。
动力工具300的控制电路包括驱动电路371和控制器37。驱动电路371与电机12的定子绕组U、V、W电性连接，用于将来自电源装置30的电流传递至定子绕组U、V、W以驱动电机12旋转。在一个实施例中，驱动电路371包括多个开关元件Q1、Q2、Q3、Q4、Q5、Q6。每个开关元件的栅极端与控制器电性连接，用于接收来自控制器的控制信号。每个开关元件的漏极或源极与电机12的定子绕组U、V、W连接。开关元件Q1-Q6接收来自控制器的控制信号改变各自的导通状态，从而改变电源装置30加载在电机12的定子绕组U、V、W上的电流。在一个实施例中，驱动电路371可以是包括六个可控半导体功率器件(例如FET，BJT，I GBT等)的三相桥驱动器电路。在一实施例中，上述开关元件也可以是任何其他类型的固态开关，例如绝缘栅双极型晶体管(I GBT)，双极结型晶体管(BJT)等。
连接部392还与电机12的驱动电路371连接，包括但不限于机械连接或电连接。通过操作触发部391带动连接部392启动或关闭电机12。
在本实施例中，操作组件39与外壳包括多个可选择性锁定的限位部，包括 但不限于卡扣配合、杆槽或钩槽配合等。通过限位部的设置，操作组件39包括多个可止位操作件的预设位置，多个预设位置分别对应传动组件工作模式和电机工作状态。在本实施例中，可包括开/关机位置、第一工作模式位置和第二工作模式位置。
控制器37根据操作组件39所处的预设位置调节电机的输出转速。
作为可替换实施例，连接部392与控制器连接，通过操作触发部391带动连接部392以使传动组件在所述第一工作模式和所述第二工作模式间切换时，连接部392同时通过控制器调节所述电机转速。
操作组件39处于不同位置时，输出的模拟信号不同。其中，操作组件39在第一工作模式位置和第二工作模式位置时，输出的模拟信号与电机12的PWM信号的占空比呈正相关关系，PWM信号的占空比与电机12的转速呈正相关关系。
在一些实施例中，动力工具300中存储有操作组件39的位置与PWM信号之间的映射关系，该映射关系可以是线性的，或者，也可以是非线性的，本申请实施例对此不作限定。
作为可替换实施例，操作组件39包括连接传动组件的连接部392和驱动连接部392的第二电机，第二电机对应的第二控制电路，连接部392形成或连接与第二电机的第二电机轴上。
操作件还包括设置在所述外壳外部供操作的触发部391，所述触发部391用于向第二电机输入控制信号。在本实施例中，触发部391为触发开关。
第二电机与电机连接，根据电机的工作状态，第二电机驱动连接部392运动以使传动组件在所述第一工作模式和第二工作模式间切换时。具体的，第二电机通过传感器以检测或识别电机的输出转速，通过电机的输出转速不同而匹配不同的工作模式。
第二电机与输出轴331连接，当输出轴331逆向受力时，第二电机根据输出轴331逆向受力的大小，第二电机驱动连接部392运动以使传动组件在所述第一工作模式和所述第二工作模式间切换时。

Claims (20)

  1. 一种动力工具，包括：
    马达，包括绕第一轴线转动的驱动轴；
    输出组件，包括以输出轴线为中心的输出轴；及
    工作附件，被所述输出轴驱动进行往复摆动；
    其中，
    所述动力工具，还包括：
    传动组件，用于在所述马达和所述输出组件之间实现动力的传递以带动所述输出轴往复摆动；及
    调节组件，用于调节所述传动组件；所述调节组件被配置为当所述输出轴的负载满足所述调节组件的预设值时，所述调节组件根据所述输出轴的负载控制所述传动组件，以使所述传动组件调节所述工作附件的摆动角度。
  2. 根据权利要求1所述的动力工具，其中，所述传动组件包括：第一轴承，用于支撑所述驱动轴，拨叉，用于支撑所述输出轴，第二轴承，用于驱动所述拨叉产生往复摆动，偏心构件，包括连接所述第一轴承的中心部和连接所述第二轴承的偏心部。
  3. 根据权利要求2所述的动力工具，其中，所述偏心部的轴线相对于所述中心部的轴线偏心设置。
  4. 根据权利要求3所述的动力工具，其中，所述传动组件设置不同的工作模式，所述传动组件处于不同的所述工作模式时，所述输出轴驱动所述工作附件以不同的角度往复摆动。
  5. 根据权利要求4所述的动力工具，其中，当所述传动组件在不同的所述工作模式间切换时，所述偏心部的轴线与所述第一轴线具有不同的偏心距。
  6. 根据权利要求4所述的动力工具，其中，所述第一轴承包括：用于连接所述驱动轴的中心孔和与所述中心孔设置有偏心距的第一偏心孔，所述第一偏心孔的中心线为第二轴线，所述偏心构件的中心部与所述第一偏心孔连接。
  7. 根据权利要求6所述的动力工具，其中，当所述传动组件在所述工作模式间切换时，所述第二轴承驱动所述偏心构件以所述第二轴线为转轴以规定行程往复摆动。
  8. 根据权利要求4所述的动力工具，其中，所述调节组件包括：第一偏压元件，所述第一偏压元件支撑所述偏心构件，向所述偏心构件施加偏压力，以使所述偏心构件向靠近所述驱动轴的方向偏压。
  9. 根据权利要求8所述的动力工具，其中，当所述输出轴受到负载时，所述偏心构件向所述第一偏压元件施加远离所述驱动轴的第一压力。
  10. 根据权利要求9所述的动力工具，其中，所述第一压力大于所述偏压力时，所述偏心构件向远离所述驱动轴方向运动。
  11. 根据权利要求2所述的动力工具，其中，所述第二轴承沿所述偏心部的轴线滑动连接至所述偏心部上，所述第二轴承以规定行程沿所述偏心部的轴线相对于所述输出轴前后往复滑动。
  12. 根据权利要求11所述的动力工具，其中，所述偏心部的轴线与所述第一轴线偏心距不变。
  13. 根据权利要求11所述的动力工具，其中，所述拨叉包括：与所述第二轴承连接的第一支撑部，所述第一支撑部沿所述第一轴线延伸。
  14. 根据权利要求13所述的动力工具，其中，所述传动组件调节所述工作附件的摆动角度时，所述第二轴承被驱动与所述第一支撑部不同位置配合。
  15. 根据权利要求2所述的动力工具，其中，所述偏心部的轴线与所述第一轴线之间设置有夹角，所述夹角大于等于0°小于等于5°。
  16. 一种动力工具，包括：
    马达，包括绕第一轴线转动的驱动轴；
    输出组件，包括以输出轴线为中心的输出轴；及
    工作附件，被所述输出轴驱动进行往复摆动；
    其中，所述输出组件根据所述输出轴的负载不同，所述输出组件驱动的所述工作附件以不同的角度摆动。
  17. 一种动力工具，包括：
    马达，包括绕第一轴线转动的驱动轴；
    输出组件，包括以输出轴线为中心的输出轴；及
    工作附件，被所述输出轴驱动进行往复摆动；
    其中，所述动力工具还包括：
    调节组件，所述调节组件被配置为根据所述输出轴的负载调节所述输出轴驱动的所述工作附件的摆动角度。
  18. 根据权利要求17所述的动力工具，还包括：传动组件，用于在所述马达和所述输出组件之间实现动力的传递以带动所述输出轴往复摆动，所述传动组件包括：第一轴承，用于支撑所述驱动轴，拨叉，用于支撑所述输出轴，第二 轴承，用于驱动所述拨叉产生往复摆动，偏心构件，包括连接所述第一轴承的中心部和连接所述第二轴承的偏心部。
  19. 根据权利要求18所述的动力工具，其中，当调节所述输出轴驱动的所述工作附件的摆动角度时，所述第二轴承驱动所述偏心构件以所述第二轴线为转轴以规定行程往复摆动。
  20. 根据权利要求18所述的动力工具，其中，所述调节组件包括：第一偏压元件，所述第一偏压元件支撑所述偏心构件，向所述偏心构件施加偏压力，以使所述偏心构件向靠近所述驱动轴的方向偏压。
PCT/CN2023/093150 2022-06-10 2023-05-10 动力工具 Ceased WO2023236709A1 (zh)

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