WO2018010699A1 - Moteur et outil électrique - Google Patents

Moteur et outil électrique Download PDF

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Publication number
WO2018010699A1
WO2018010699A1 PCT/CN2017/093239 CN2017093239W WO2018010699A1 WO 2018010699 A1 WO2018010699 A1 WO 2018010699A1 CN 2017093239 W CN2017093239 W CN 2017093239W WO 2018010699 A1 WO2018010699 A1 WO 2018010699A1
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WO
WIPO (PCT)
Prior art keywords
motor
power
tool
stator
rotor
Prior art date
Application number
PCT/CN2017/093239
Other languages
English (en)
Chinese (zh)
Inventor
张伟
李伟锋
李光
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2018010699A1 publication Critical patent/WO2018010699A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • the present invention relates to an electric machine, and more particularly to an electric machine for driving a power tool.
  • the invention also relates to a power tool, and more particularly to a power tool having a motor that drives a power tool.
  • the invention relates to a tool body.
  • the invention also relates to a power tool.
  • the diameter D of the motor rotor is approximately 60 mm or more, and the stator stack length L is approximately 40 mm or more. Therefore, the power of the motor in a unit volume or unit weight is relatively low, that is, the power density of the motor is relatively low. In this way, not only the motor itself is bulky and high in weight, but when the motor is mounted on a power tool or other tools and equipment, the corresponding power tool or other tools are relatively large in volume and weight. Especially when these tools are hand-held tools, the tool is large in size and the tool quality is relatively heavy, which brings great inconvenience to the operator.
  • the conventional power tool includes a working component, a motor, a transmission mechanism, a start switch, a control circuit, an energy supply unit, a closing start switch, a circuit between the energy supply unit and the motor, and the control circuit controls the motor to start rotating, and the transmission mechanism will The rotation of the motor is transmitted to the working part to perform the corresponding work.
  • the energy supply unit is a battery pack
  • the battery pack is detachably connected to the power tool.
  • each type of power tool requires a motor, an energy supply unit, and a control circuit.
  • the cost is equivalent to the sum of the cost of N motors, N control circuits, N energy supply units, and N work components.
  • the user usually, the user only uses one power tool at a time, making The other N-1 power tools are idle, that is, other N-1 motors, N-1 control circuits, and N-1 energy supply units are idle.
  • This status quo greatly reduces the user's input-output ratio.
  • it is proposed to develop a new type of power tool which makes the motor and control circuit into a universal component. This component can be used in many different power tools to improve the utilization rate of the motor and control circuit, thereby improving the user. Input-output ratio.
  • the biggest difficulty is that the power, speed, torque, efficiency and other requirements of different power tools are different, and how the motor achieves high efficiency under different power, speed and torque. How to balance the minimum power of the tool to the working efficiency of the motor, while working on the highest power tool, to ensure that the motor does not burn the machine, how to meet the maximum speed and minimum speed required by different tools.
  • the technical problem to be solved by the present invention is to provide a motor which can output a higher power per unit volume or unit mass.
  • the present invention also provides an electric machine for a power tool including a stator, a rotor rotatable relative to the stator, a rotating shaft, and a stator bracket for fixing the stator to the power tool, the motor generating a magnetic field after being energized,
  • the rotor rotates under the action of a magnetic field
  • the rotating shaft is fixedly connected with the rotor, and rotates together with the rotor to drive a working part of the electric tool to perform a related work
  • the volume of the motor is v
  • motor operation when power is P P is the rated motor power amount
  • the amount of the rated power P of the motor and the specific volume v of the motor is k, k ⁇ 16.5w / cm 3.
  • the rated power of the motor is 960w ⁇ P amount ⁇ 1440w, and the volume of the motor is 58cm 3 ⁇ v ⁇ 83.1cm 3 .
  • the amount of rated power P of the motor is 1200w.
  • the motor is an outer rotor motor.
  • the rotor comprises a cylindrical rotor body with open ends, a magnetic pole piece is disposed on an inner wall of the rotor body, the rotor body is sleeved outside the stator, and an outer diameter of the rotor body D, 45 mm ⁇ D ⁇ 55 mm;
  • the stator includes a stator through hole axially penetrating the inside of the stator, and the stack length of the stator is L, 25 mm ⁇ L ⁇ 35 mm; the rotating shaft penetrates the through hole of the stator and is The rotor body is fixedly connected; the rated power of the motor is 960w ⁇ P amount ⁇ 1440w.
  • the diameter D of the rotor body is 50 mm, and the stack length L of the stator is 30 mm.
  • the motor operates when the rotational speed N, the amount of N is the rated motor speed, 12800 rpm / min ⁇ N amount ⁇ 19200 rev / min.
  • the motor rotates at a speed of 12800 rpm/ ⁇ ⁇ N amount ⁇ 19200 rpm, and the cumulative working life of the motor is t, 1000 hours ⁇ t ⁇ 1500 hours.
  • the motor is a brushless motor.
  • one end of the stator bracket is fixedly connected to the stator, and the other end is connected to a power tool for fixing the motor to the power tool through the stator bracket, and the motor further includes a bearing disposed outside the rotating shaft, the bearing A first bearing is disposed between the stator bracket and the outer wall of the rotating shaft, and the first bearing is adjacent to an end of the stator bracket fixed to the power tool.
  • the rotating shaft extends through the two ends of the stator bracket, and one end of the stator bracket away from the stator is fixed to the power tool, and the end extends along the stator through hole toward the inside of the stator through hole to form a sleeve.
  • the composition of the stator support comprises an aeronautical aluminum material.
  • the bearing comprises a second bearing between the inner wall of the stator through hole and the outer wall of the rotating shaft, and the second bearing is for rotating the rotating shaft relative to the stator.
  • the second bearing is composed of two or more juxtaposed bearings.
  • the second bearing is composed of two parallel ball bearings, and a retaining ring is arranged between the two parallel ball bearings to prevent mutual interference between the two parallel bearings.
  • the second bearing is a needle bearing, and the axial direction of the needle is parallel to the axial direction of the rotating shaft.
  • the rotor further includes an end cover at one end of the rotor body, and the end cover is fixed to an end of the rotor body away from the stator bracket, and the motor further includes a cavity formed in the inner wall of the rotor through hole and the outer wall of the rotating shaft. a third bearing, and the third bearing is located between an end of the stator away from the stator bracket and the end cover.
  • the distance from the inner wall of the third bearing to the outer wall of the third bearing is greater than or equal to the distance from the outer wall of the rotating shaft to the inner wall of the through hole of the stator.
  • the third bearing is fixed by a bearing holder that is fastened to the stator.
  • the stator comprises a stator armature provided with an energized coil, the stator armature being energized
  • the magnetic field is then generated and the motor is rotated by the magnetic field interacting with the pole piece, the number of the pole pieces being 10 or more.
  • the input power of the motor is P1
  • the output power of the motor is P2
  • the efficiency of the motor is ⁇
  • ⁇ P2/P1
  • the output power of the motor is 300w ⁇ P ⁇ 1200w, ⁇ ⁇ 75%.
  • the efficiency of the motor is ⁇ ⁇ 80%.
  • the number of the pole pieces is n1, n1 ⁇ 20.
  • the number of pole pieces n1 is 10
  • the linear velocity of the pole piece is V2 ⁇ 41.87 m / sec
  • the effective bonding area of the pole piece is s ⁇ 272 mm 2 .
  • the motor is detachably mounted to at least two power tools, respectively a first power tool and a second power tool, the first power tool being rated at a first power rating Pf, and the second power tool second rated power rated power Pf, the amount of rated power P ⁇ PS PS ⁇ Pf, of the motor.
  • the first rated power Pf is between 300w and 1200
  • the second rated power PS is between 300w and 1200w
  • the working efficiency of the motor is 75%. the above.
  • the electric machine includes a stator and a rotor rotatable relative to the stator, the rotor includes a pole piece, the stator includes a stator armature, and after the electric motor is energized, the stator armature generates a magnetic field and the The pole piece interaction causes the rotor to rotate, and the number of the pole pieces is 10 or more.
  • the motor is an outer rotor motor
  • the rotor includes a cylindrical rotor body that is open at both ends, the rotor body is sleeved on the outside of the stator, and the pole piece is located on an inner wall of the rotor body.
  • the number of the pole pieces does not exceed 20 pieces.
  • the first power tool and/or the second power tool are provided with a speed matching device for matching the rotation speed of the motor and the rotation speed of the power tool.
  • the rotation speed matching device is at least one of a gear reducer, a worm reducer, a planetary gear reducer, a belt, and a timing belt.
  • the speed matching device is an electronic control switch, and the electronic control switch reduces the rotation speed of the motor by reducing the input voltage or the input current of the motor, thereby making the motor speed and the electric motor The speed of the match is matched.
  • the present invention also provides an electric motor including a stator, a rotor rotatable relative to the stator, a pole piece fixed to the inside of the motor, a rotating shaft, and a stator bracket for fixing the stator to the power tool, the motor being energized Generating a magnetic field and interacting with the pole piece to rotate the rotor, the rotating shaft is fixedly connected with the rotor, and rotates together with the rotor to drive the working part of the electric tool to work.
  • the mass of the motor is M
  • the output power P of the motor is working
  • the motor is rated at P amount
  • the amount of the rated power P of the motor M the mass ratio of the motor is ⁇ , ⁇ 2.4w / g.
  • the motor is allowed to operate with an output power of 960w ⁇ P amount ⁇ 1440w, and the mass of the motor is 350 ⁇ M ⁇ 450g.
  • the present invention also provides a power tool including a tool housing, a working member supported by the tool housing, a grip handle, and the motor described above for driving a working component of the power tool to perform related work.
  • the technical problem to be solved by the present invention is to provide a power unit capable of powering a tool body of a different power tool.
  • a power device that can power a tool body of a power tool, the tool body including a tool housing, and a working member supported by the tool housing
  • the power unit includes a main housing, a motor and a circuit board supported by the main housing, the main housing being detachably mountable with the tool housing, and the main housing is mounted to the main housing
  • the working component can be driven by the motor.
  • the power device further includes an energy supply unit that supplies energy to the motor, and the energy supply unit includes a piggyback structure, and the energy supply unit can be carried by the backing structure to the operator's back.
  • the energy supply unit further comprises a flexible device connected to the tool housing or the main housing such that the energy supply unit is electrically connected to the motor.
  • the circuit board includes an identification unit and a control unit, the identification unit identifies a type of the tool body mounted with the power device, and generates a signal corresponding to the tool body type to be sent to the control circuit; the control circuit And controlling the rotational motion of the motor output to match the type of the tool body according to the signal transmitted by the identification unit.
  • the power device has a rated output power of between 200w and 2500w. Value.
  • the power unit further includes an energy supply unit that supplies energy to the motor, the energy supply unit being detachably supported by the main housing.
  • the present invention also provides a power unit that can power a tool body of a power tool, the tool body including a tool housing, and a working component supported by the tool housing; the power unit including a main housing a motor supported by the main housing; the main housing is detachably mountable with the tool housing, and when the main housing is mounted to the tool housing, the working member may be Motor driven.
  • the present invention also provides a power tool including a tool body and a power unit, the power unit providing power to the tool body, the tool body including a tool housing, and a working component supported by the tool housing;
  • the power unit includes a main housing, a motor and a circuit board supported by the main housing, the main housing being detachably mountable with the tool housing, and the main housing being mounted on the main housing
  • the working component can be driven by the motor when the tool housing is in use.
  • the power tool further includes an energy supply unit that supplies energy to the motor, and the energy supply unit includes a piggyback structure, and the energy supply unit can be carried by the backing structure to the operator's back.
  • the energy supply unit further comprises a flexible device connected to the tool housing or the main housing such that the energy supply unit is electrically connected to the motor.
  • the circuit board further includes an identification unit and a control circuit
  • the identification unit identifies a type of the tool body mounted with the power device, and generates a signal corresponding to the tool body type to be sent to the control circuit;
  • the circuit controls the rotational motion of the motor output to match the type of the tool body based on the signal transmitted by the identification unit.
  • the tool body further includes a grip handle supported by the tool housing, the grip handle being held by an operator when the working member is driven by the motor.
  • the power tool further includes a start switch that closes the start switch when the tool housing is separated from the main housing, and a closed loop cannot be formed between the motor and the energy supply unit.
  • the activation switch is closed, and a closed loop is formed between the motor and the energy supply unit.
  • the rated output power of the power unit is a value between 200W and 2500w.
  • the power tool further includes an energy supply unit that supplies energy to the motor, the energy supply unit being detachably supported by the main housing or the tool housing.
  • the present invention also provides a power tool including a tool body and a power unit, the power unit providing power to the tool body, the tool body including a tool housing, and a working component supported by the tool housing;
  • the power unit includes a main housing, a motor supported by the main housing, the main housing being detachably mountable with the tool housing, and the main housing being mounted to the tool housing
  • the working component can be driven by the motor.
  • the present invention also provides a power tool system including a power unit and at least two tool bodies capable of powering the at least two tool bodies, each of the at least two tool bodies A tool housing, and a working component supported by the tool housing;
  • the power unit includes a main housing, a motor and a circuit board supported by the main housing;
  • the main housing can be The tool housing is detachably mounted, and the working member is drivable by the motor when the main housing is mounted to the tool housing.
  • the power tool includes an energy supply unit including a piggyback structure, and the energy supply unit can be carried by the backing structure to the operator's back.
  • the energy supply unit further comprises a flexible device connected to the tool housing or the main housing such that the energy supply unit is electrically connected to the motor.
  • the circuit board includes an identification unit and a control circuit
  • the identification unit identifies a type of the tool body mounted with the power device, and generates a signal corresponding to the tool body type to be sent to the control circuit; the control circuit And controlling the rotational motion of the motor output to match the type of the tool body according to the signal transmitted by the identification unit.
  • the tool body further includes a grip handle supported by the tool housing, the grip handle being held by an operator when the working member is driven by the motor.
  • the power tool further includes a start switch that closes the start switch when the tool housing is separated from the main housing, and a closed loop cannot be formed between the motor and the energy supply unit.
  • the activation switch is closed, and a closed loop is formed between the motor and the energy supply unit.
  • the rated output power of the power unit is a value between 200W and 2500w.
  • the power tool includes an energy supply unit, and the energy supply unit is detachably Supported by the main housing.
  • the present invention also provides a power tool system including a power unit and at least two tool bodies capable of powering the at least two tool bodies, each of the at least two tool bodies A tool housing, and a working component supported by the tool housing;
  • the power unit includes a main housing, a motor supported by the main housing; the main housing and the tool housing Removably mounted, the working component can be driven by the motor when the main housing is mounted to the tool housing.
  • the present invention also provides a power unit that can power a tool body of a power tool, the tool body including a tool housing, and a working component supported by the tool housing; the power unit is a main housing a motor and a circuit board supported by the main housing; the power unit is detachably connectable to the tool body, and the working member is detachable from the motor when the power unit is coupled to the tool body drive.
  • the present invention also provides a power unit that can power a tool body of a power tool, the tool body including a tool housing, and a working component supported by the tool housing; the power unit is a main housing Composed of a motor supported by the main housing; the power unit is detachably connectable to the tool body, and the working member is drivable by the motor when the power unit is coupled to the tool body.
  • the present invention also provides a power tool including a tool body and a power unit, the power unit providing power to the tool body, the tool body including a tool housing, and a working component supported by the tool housing;
  • the power unit is composed of a main housing, a motor supported by the main housing, and a circuit board; the power unit is detachably connectable to the tool body when the power unit is coupled to the tool body
  • the working component can be driven by the motor.
  • the present invention also provides a power tool including a tool body and a power unit, the power unit providing power to the tool body, the tool body including a tool housing, and a working component supported by the tool housing;
  • the power unit is composed of a main housing, a motor supported by the main housing; the power unit is detachably connectable with the tool body, and when the power unit is coupled to the tool body, The working component can be driven by the motor.
  • the present invention also provides a power tool system including a power unit and at least two tool bodies capable of powering the at least two tool bodies, each of the at least two tool bodies Including a tool housing and a working portion supported by the tool housing
  • the power unit is composed of a main housing, a motor supported by the main housing, and a circuit board; the power unit is detachably connectable with the tool body, and the power unit and the tool body When connected, the working component can be driven by the motor.
  • the present invention also provides a power tool system including a power unit and at least two tool bodies capable of powering the at least two tool bodies, each of the at least two tool bodies Included, a tool housing, and a working component supported by the tool housing;
  • the power unit is comprised of a main housing, a motor and a circuit board supported by the main housing; the power unit can be coupled to the tool
  • the body is detachably coupled, and the working member is drivable by the motor when the power unit is coupled to the tool body.
  • the present invention also provides a power unit that at least selectively powers a tool body of a first power tool and a tool body of a second power tool, wherein the power unit includes a main housing, and a motor supported by the main casing; the main casing is detachably mounted to the tool body of the first power tool and the tool body of the second power tool, and the rated power of the first power tool is the first rated power, The rated power of the second power tool is a second rated power, and the difference between the first rated power and the second rated power is 200 W or more, when the main casing is mounted on the tool body of the first power tool, The tool body of the first power tool is driven by the motor, the working efficiency of the motor is 75% or more; when the main casing is mounted to the tool body of the second power tool, the second power tool The tool body is driven by the motor, and the motor has an operating efficiency of 75% or more.
  • the difference between the first rated power and the second rated power is 800 W or more.
  • the first rated power is between 200W and 400W
  • the second rated power is between 1000W and 1400W.
  • the present invention also provides a power unit that at least selectively powers a tool body of a first power tool and a tool body of a second power tool, wherein the power unit includes a main housing, and a motor supported by the main casing; the main casing being detachably mountable with a tool body of the first power tool and a tool body of the second power tool, when the main casing is mounted to the tool body
  • the tool body is driven by the motor, and when the output power of the motor is between the first preset power and the second preset power, the working efficiency of the motor is 75% or more, and the first preset power is The difference between the second preset powers is 200 W or more.
  • the first preset power is greater than 350 W, and the second preset power is less than 2500 W.
  • the working efficiency of the motor is 78% or more.
  • the working efficiency of the motor is 80% or more.
  • the motor is an outer rotor brushless motor.
  • the outer rotor brushless motor has an outer diameter of 45 mm to 64 mm and a stator stack thickness of 15 mm to 35 mm.
  • the rotor of the outer rotor brushless motor has an outer diameter of 45 mm-55 mm and a stator stack thickness of 25 mm-35 mm.
  • the motor has a no-load speed of between 15,000 rpm and 16,000 rpm.
  • the weight of the motor is between 350g and 450g.
  • the present invention also provides a power tool system, characterized in that the power tool system includes at least a tool body of a first power tool and a tool body of a second power tool, and a tool body that can alternatively be a first power tool And a power device that provides power to the tool body of the second power tool; the rated power of the first power tool is a first rated power, and the rated power of the second power tool is a second rated power, a first rated power and a The difference between the two rated powers is 200 W or more; when the main casing is mounted on the tool body of the first power tool, the tool body of the first power tool is driven by the motor, and the working efficiency of the motor It is 75% or more; when the main casing is mounted to the tool body of the second electric power tool, the tool body of the second electric power tool is driven by the motor, and the working efficiency of the motor is 75% or more.
  • the present invention also provides a power tool system including at least a tool body of a first power tool and a tool body of a second power tool, and optionally a tool body and a second motor of the first power tool a power device that provides power to the tool body of the tool; when the main housing is mounted to the tool body, the tool body is driven by the motor, and the output power of the motor is a first preset power to a second pre- When the power is set, the working efficiency of the motor is 75% or more, and the difference between the first preset power and the second preset power is 200 W or more.
  • the first rated power is between 560w and 600w, and when the power device is mounted on the tool body of the first power tool, the working efficiency of the motor is 82% or more.
  • the first rated power is between 400W and 500w, and when the power device is mounted on the tool body of the first power tool, the working efficiency of the motor is 82% or more.
  • the first rated power is 750w-850w, and when the power device is mounted on the tool body of the first power tool, the working efficiency of the motor is 84% or more.
  • the first rated power is 1100w-1300w, and when the power device is mounted on the tool body of the first power tool, the working efficiency of the motor is 85% or more.
  • the present invention also provides a power device that can at least selectively power a tool body of a first power tool and a tool body of a second power tool, wherein the power device includes a main housing, and a motor supported by the main casing; the main casing is detachably mounted to the tool body of the first power tool and the tool body of the second power tool, and the output torque of the motor is a first preset torque to a second pre- When the torque is set, the working efficiency of the motor is 75% or more, and the difference between the first preset torque and the second preset torque is 0.5 NM or more.
  • the working efficiency of the motor is 75% or more.
  • the working efficiency of the motor is 78% or more.
  • the motor is an outer rotor brushless motor.
  • the rotor outer diameter of the outer rotor brushless motor is between 45 mm and 64 mm, and the stack thickness of the stator is between 15 mm and 35 mm.
  • the rotor outer diameter of the outer rotor brushless motor is between 45 mm and 55 mm, and the stack thickness of the stator is between 25 mm and 35 mm.
  • the motor has a no-load speed of between 15,000 rpm and 16,000 rpm.
  • the weight of the motor is between 350g and 450g.
  • the present invention also provides a power tool system, characterized in that the power tool system includes at least a tool body of a first power tool and a tool body of a second power tool, and a tool body that can alternatively be a first power tool And a power unit that provides power to the tool body of the second power tool; the power unit is the power unit of any one of claims 19-26.
  • the present invention also provides a power unit that at least selectively powers a tool body of a first power tool and a tool body of a second power tool, wherein the power unit includes a main housing, and a motor supported by the main casing; the main casing is detachably mounted to the tool body of the first power tool and the tool body of the second power tool, and the rated power of the first power tool is the first rated power, The rated power of the second power tool is the second rated power, the first amount The constant power is different from the second rated power, and the motor is an outer rotor brushless motor.
  • the difference between the first rated power and the second rated power is 200 W or more.
  • the difference between the first rated power and the second rated power is 800 W or more.
  • the first rated power is between 200W and 400W
  • the second rated power is between 1000W and 1400W.
  • the present invention also provides a power device that can at least selectively power a tool body of a first power tool and a tool body of a second power tool, wherein the power device includes a main housing, and a motor supported by the main casing; the main casing is detachably mountable with the tool body, and when the main casing is mounted to the tool body, the tool body is driven by the motor,
  • the output torque of the motor is between a first preset torque and a second preset torque, and the first preset torque is different from the second preset torque, and the motor is an outer rotor brushless motor.
  • the difference between the first preset torque and the second preset torque is 0.5 NM or more.
  • the working efficiency of the motor is 75% or more.
  • the working efficiency of the motor is 78% or more.
  • the motor is an outer rotor brushless motor.
  • the rotor outer diameter of the outer rotor brushless motor is between 45 mm and 64 mm, and the stack thickness of the stator is between 15 mm and 35 mm.
  • the motor has a no-load speed of between 15,000 rpm and 16,000 rpm.
  • the weight of the motor is between 350g and 450g.
  • the present invention also provides a power tool system, characterized in that the power tool system includes at least a tool body of a first power tool and a tool body of a second power tool, and a tool body that can alternatively be a first power tool And a power unit that provides power to the tool body of the second power tool; the power unit is the power unit of any one of claims 28-39.
  • the present invention also provides a power device that can at least selectively power a tool body of two power tools, wherein the power device includes a main housing, and a motor supported by the main housing;
  • the main housing is detachably mountable with a tool body of the power tool, and when the main housing is mounted to a tool body of the power tool, a tool body of the power tool is driven by the motor
  • the weight of the motor is between 350g and 450g.
  • the motor has a no-load speed of between 15,000 rpm and 16,000 rpm.
  • the ratio of the output power to the weight of the motor is greater than 2.6 w/g.
  • the power device further includes an energy storage unit, and the voltage of the energy storage unit is 60V or more.
  • the weight of the power device is 2Kg to 2.1Kg, and the ratio of the rated output power to the weight of the power device is 523w/Kg to 550w/Kg.
  • the power device has a weight of 2 Kg to 2.1 Kg, and the ratio of the output energy to the weight of the power device is 57 Wh/kg to 60 Wh/kg.
  • the present invention also provides a power tool system, characterized in that the power tool system comprises at least two tool bodies of the power tool, and a power device that can at least selectively power the tool bodies of the two power tools.
  • the power unit is a power unit as described above.
  • the present invention also provides a power device that can at least selectively power a tool body of a first power tool and a tool body of a second power tool, wherein the power device includes a main housing, and a motor supported by the main casing; the main casing is detachably mountable with the tool body, and when the main casing is mounted to the tool body, the tool body is driven by the motor,
  • the motor has a no-load speed of 10,000 rpm or more.
  • the motor has an idle speed of between 15,000 and 16000 rpm.
  • the motor has a weight of less than 500 g.
  • the present invention also provides a power tool system, characterized in that the power tool system includes at least a tool body of a first power tool and a tool body of a second power tool, and a tool body that can alternatively be a first power tool And a power unit that provides power to the tool body of the second power tool, the power unit being a power unit as previously described.
  • the rated speed of the first power tool is a first preset speed
  • the rated speed of the second power tool is a second preset speed
  • the first preset speed and the second preset The difference in rotational speed is 7,000 rpm or more.
  • the tool body of the first power tool includes a reduction box, and an input end of the reduction box is coupled to an output shaft of the motor, and the reduction box converts an output rotation speed of the motor to be suitable for the first power tool output.
  • the rotational speed of the second electric tool is substantially the same as the output rotational speed of the motor.
  • the first power tool is a pruning shear, and the reduction ratio of the reduction gear box is 12:1 to 13:1; Or the first power tool is a grass cutter, the reduction ratio of the reduction gear box is 2.3:1 to 3:1; or the first power tool is a lawn mower, and the reduction ratio of the reduction gear box is 4.4: 1 to 5.2:1; or the first electric tool is a chain saw, the reduction ratio of the reduction gear box is 2:1 to 6:1; or the first electric power tool is a high pressure cleaning machine, and the reduction gear box is The reduction ratio is 4.5:1 to 6.4:1.
  • the tool body of the first power tool includes a first reduction gearbox having a first reduction ratio
  • the tool body of the second power tool includes a second reduction gearbox having a second reduction ratio
  • the first The reduction ratio and the second reduction ratio are any one of the following ratios: 12:1 to 13:1, or 2.3:1 to 3:1, or 4.4:1 to 5.2:1, or 2:1 to 6: 1, or 4.5:1 to 6.4:1.
  • FIG. 1 is a structural view of a power tool system according to a preferred embodiment
  • Figure 2 is a schematic view showing the structure of the first preferred embodiment of the power unit shown in Figure 1;
  • FIG. 3 is a schematic structural view of a second preferred embodiment of the power unit shown in FIG. 1;
  • FIG. 4 is a schematic structural view of a third preferred embodiment of the power unit shown in FIG. 1;
  • Figure 5 is a schematic structural view of a fourth preferred embodiment of the power unit shown in Figure 1;
  • Figure 6 is a schematic view showing a first preferred embodiment of the type of the power tool identification tool body shown in Figure 4;
  • Figure 7 is a schematic view showing a second preferred embodiment of the type of the power tool identification tool body shown in Figure 4;
  • Figure 8 is a schematic view showing a first preferred embodiment of the electrical connection of the power unit of Figure 1 and the tool body;
  • Figure 9 is a schematic view showing a second preferred embodiment of the electrical connection of the power unit of Figure 1 and the tool body;
  • Figure 10 is a schematic view showing a preferred embodiment of the connection structure of the power unit and the tool body shown in Figure 1;
  • Figure 11 is a schematic view of the power unit of Figure 10 and the tool body in the process of installation;
  • Figure 12 is a schematic view showing the installation of the power unit and the tool body shown in Figure 10;
  • Figure 13 is a schematic view showing a fourth preferred embodiment of the electrical connection of the power unit of Figure 1 and the tool body;
  • Figure 14 is a schematic view showing another preferred embodiment of the connection structure of the power unit and the tool body shown in Figure 1;
  • Figure 15 is a schematic view showing the installation of the power unit and the tool body shown in Figure 14;
  • Figure 16 is a structural view of a power tool system according to a preferred embodiment
  • Figure 17 is a structural view of a first preferred embodiment of the tool body provided by the present invention.
  • Figure 18 is a structural view of a second preferred embodiment of the tool body provided by the present invention.
  • Figure 19 is a structural view showing a third preferred embodiment of the power tool provided by the present invention.
  • Figure 17a is a perspective view of the motor in the first preferred embodiment under high power and small volume
  • Figure 18a is a cross-sectional view of Figure 17a
  • Figure 19a is a perspective view of the rotor body of the motor shown in Figure 17a;
  • Figure 20a is a perspective view of the end cap of the motor of Figure 17a;
  • Figure 21a is a schematic structural view of the end cap when the notch is disposed at other positions of the end cap;
  • Figure 22a is a perspective view of the second fan of the motor shown in Figure 17a;
  • Figure 23a is a partial structural view of the motor when the first fan is not disposed on the end cover;
  • Figure 24a is a schematic view showing the structure of the second preferred embodiment under high power and small volume
  • Figure 25a is a schematic view showing the structure of the motor when the second bearing is a needle bearing.
  • FIG. 1 is a schematic structural view of a power tool system according to a preferred embodiment.
  • the power tool system includes a power unit 100 and a tool body of at least two power tools, wherein the power unit 100 is detachably mounted with the tool bodies of the at least two power tools to power the tool bodies of the at least two power tools.
  • the power tool system includes four types of tool bodies, namely, a blower tool body 300, a lawnmower tool body 400, a chainsaw tool body 500, and a pruning shear tool body 600.
  • the same interface for mounting the power unit 100 is provided on all four tool bodies.
  • the tool body may also be a hand-push power tool body such as a lawn mower tool body.
  • the power unit 100 is detachably mounted to the four tool bodies and powers the four tool bodies. When the power unit 100 is mounted to any one of the four tool bodies, a complete power tool is constructed to perform the work performed by the type of power tool.
  • the maximum output power of the power device 100 matches the highest input power required for all the tool bodies that can mount the power device 100; the maximum output speed of the power device 100 and all the powers that can be installed The highest input speed required for the tool body of device 100 matches. For example, if the maximum input power required for all the tool bodies capable of installing the power unit 100 is 1000 W, and the minimum input power required for all the tool bodies capable of mounting the power unit 100 is 100 W, the output power that the power unit 100 can provide must be More than 1000w.
  • the chainsaw and mower are rated at a high power of around 1500w. The rated power of the lawnmower is low, about 300w.
  • the rated output power of the power unit 100 is 2500w or so.
  • its rated output power may be 300w, or 500w, or 1000w, or 1500w, or 2000w, or 200w.
  • the power unit 100 When the power unit 100 is mounted on a tool body having a required input power of only 100 W, the power design of the power unit 100 is excessively large, causing unnecessary waste. If the maximum input speed required for all the tool bodies capable of mounting the power unit 100 is 20,000 rpm, and the minimum input speed required for all the tool bodies capable of mounting the power unit 100 is 1000 rpm, the power unit 100 can provide The output speed must be higher than 20,000 rpm. When the power unit 100 is installed at a required input speed of only 1000 When the tool body is transferred/divided, the rotational speed of the power unit 100 is designed to be too high, resulting in unnecessary waste.
  • the power tool system includes different types of tool bodies requiring the highest input power; such as between 500w and 1000w.
  • the power tool system includes a similar approximation of the maximum input speed required for different types of tool bodies.
  • the blower tool body 300 includes a tool housing 302, and a working member 304 and a grip handle 301 supported by the tool housing 302.
  • the lawnmower tool body 400 includes a tool housing 402, and a working component 404 and a grip handle 401 supported by the tool housing 402.
  • the chainsaw tool body 500 includes a tool housing 502, and a working component 504 and a grip handle 501 supported by the tool housing 502.
  • the pruning shear tool body 600 includes a tool housing 602, and a working component 604 and a grip handle 601 supported by the tool housing 602.
  • the working component 304 (404, 504, 604) receives the power transmitted by the powerplant 100 and converts it into a power output that matches the tool body.
  • the handle 301 (401, 501, 601) is used to hold power to the tool body when the power tool is in operation, and the work member 304 (404, 504, 604) has an output that is held by the operator.
  • the grip handles 301 (401, 501, 601) are disposed on the tool body such that different types of grip handles 301 (401, 501, 601) can be configured for different types of tool bodies. It will be understood by those skilled in the art that the grip handles 301 (401, 501, 601) can also be disposed on the power unit 100. Under this configuration, all types of power tools have the same grip handles 301 (401, 501, 601) and do not follow the tool body. The type changes and changes.
  • the grip handles 301 (401, 501, 601) are disposed on the tool body, and since the structure of each of the grip handles 301 (401, 501, 601) is adapted to the type of the tool body, the comfort of the operator's grip can be remarkably improved.
  • the specific structure of the first preferred embodiment of the power unit 100 is shown in FIG.
  • the power unit 100 includes a main housing 102, a motor 104, and a control circuit 110.
  • Control circuit 110 controls the rotational motion of motor 104.
  • the main housing 102 is detachably mounted to the tool housing 302 (402, 502, 602).
  • the working components 304 404, 504, 604 can be driven by the motor 104, i.e., the power of the motor 104 can be transferred to the working components 304 (404, 504, 604).
  • the motor 104 is a brushless motor.
  • the control circuit 110 controls the commutation of the brushless motor and its rotational speed.
  • the output of the power unit 100 does not change depending on the type of the tool body.
  • a corresponding structure can be set in the tool body to convert a constant input into an input that matches the type of the tool body.
  • the power unit 100 includes a main housing 102, a motor 104, an identification unit 108, and a control circuit 110.
  • the main housing 102 is detachably mounted to the tool housing 302 (402, 502, 602).
  • the working components 304 (404, 504, 604) can be driven by the motor 104, i.e., the power of the motor 104 can be transferred to the working components 304 (404, 504, 604).
  • Motor 104 optionally outputs a rotational motion.
  • the recognition unit 108 identifies the type of the tool body mounted with the power unit 100, and generates a signal corresponding to the tool body type to be transmitted to the control circuit 110.
  • the control circuit 110 controls the motor 104 to output a rotational motion that matches the type of tool body based on the signal transmitted by the identification unit 108.
  • the control circuit 110 can control the motor 104 to output different rotational motions according to the signal sent by the identification unit 108, thereby transmitting different power to the working member 304, thereby enabling the power unit to be mounted.
  • the tool body of 100 is capable of outputting a power output that matches the type of tool body. This allows the power unit 100 to be shared between different tool bodies.
  • the specific structure of the third preferred embodiment of the power unit 100 is shown in FIG.
  • the power unit 100 includes a main housing 102, a motor 104, an identification unit 108, a control circuit 110, and an energy supply unit 112.
  • the main housing 102 is detachably mounted to the tool housing 302 (402, 502, 602).
  • the working components 304 404, 504, 604
  • Motor 104 optionally outputs a rotational motion.
  • the energy supply unit 112 provides power to the motor 104.
  • the energy supply unit 112 may be an AC power line, or a rechargeable energy storage unit, or may provide an AC or DC power source at the same time.
  • the recognition unit 108 identifies the type of the tool body mounted with the power unit 100 and generates a signal matching the tool body type to the control circuit 110.
  • the control circuit 110 controls the rotational motion of the motor 104 based on the signal transmitted by the identification unit 108. When the power unit 100 is mounted on different tool bodies, the control circuit 110 can control the motor 104 to output different rotational motions according to the signal sent by the identification unit 108, thereby transmitting different power to the working member 304, thereby enabling the power unit to be mounted.
  • the tool body of 100 is capable of outputting a power output that matches the type of tool body.
  • the energy supply unit 112 is common with other components such as the motor 104. It is disposed in the main casing 102. This structure makes the structure of the power unit 100 single, and is convenient for conversion between different power tools.
  • the present invention also provides a fourth preferred embodiment of the power unit 100.
  • the fourth preferred embodiment differs from the third preferred embodiment in that the energy supply unit 112 has a separate third housing 1121 when the energy supply unit 112 is a rechargeable energy storage unit.
  • the power unit 100 is provided with a housing portion 1022 that houses the third housing 1121 and fixedly mounts the third housing 1121.
  • the energy supply unit 112 is detachably mounted and supported by the main housing 102 of the power unit 100, thereby having the beneficial effect that the energy supply unit 112 retains the conventional structure and can be charged using a conventional charger, charging more. Convenient.
  • the present invention also provides a fifth preferred embodiment of the power unit 100.
  • the fifth preferred embodiment differs from the third preferred embodiment in that the power unit 100 does not include the identification unit 108.
  • the present invention also provides a sixth preferred embodiment of the power unit 100.
  • the sixth preferred embodiment differs from the fourth preferred embodiment in that the power unit 100 does not include the identification unit 108.
  • the power unit 100 of the first and second preferred embodiments does not include the energy providing unit 112.
  • the energy supply unit 112 is disposed on the tool body.
  • the energy supply unit 112 is non-detachably disposed on the tool body or detachably disposed on the tool body.
  • the power unit 100 may not include the control circuit 110.
  • control circuit 110 is included in the tool body.
  • the control circuit 110 may be partially disposed in the power unit 100 and the other portion disposed in the tool body.
  • control circuit 110 can control the rotational motion of the motor 104 and can also control the discharge process of the energy supply unit 112. Specifically, the control circuit 110 detects a discharge state of the energy supply unit 112 during discharge of the power device 100, such as a discharge current, a current voltage, and the like, and allows or prohibits the energy supply unit 112 from supplying energy to the motor 104 according to the detected discharge state. .
  • the battery pack voltage is 20V or more.
  • the identification unit 108 of the power unit 100 recognizes the type of the tool body of the power tool in various ways, including automatic recognition and semi-automatic identification.
  • the type of tool body that automatically identifies the power tool can be achieved by setting an identification element that matches the particular tool body type on the tool body.
  • the identification unit 108 is configured The detecting element disposed therein detects the identifying component, and the type of the identifying component is identified by the signal detected by the detecting component, thereby identifying the type of the tool body.
  • the type of power tool identified in a semi-automatic manner can be achieved by the identification unit 108 including a selection element disposed on the main housing 102 for user operation, the selection elements being operatively in different states.
  • the user sets the type of the tool body by operating the selection element in a different state, and the recognition unit 108 recognizes the result of the operation of the user on the state of the selection element, thereby identifying the type of the tool body set by the user.
  • the third preferred embodiment of the power device 100 will be taken as an example, and the two recognition modes will be described with reference to FIGS. 6 and 7. Those skilled in the art will appreciate that the identification methods described below are equally applicable to other embodiments of the powerplant 100.
  • FIG. 6 is a schematic structural view of a preferred embodiment of the automatic identification tool body type.
  • the recognition unit 108 automatically recognizes the type of the tool body mounted with the power unit 100 in a non-contact manner.
  • the identification unit 108 includes a processing circuit 1080 and four Hall elements located at different positions, respectively being a first Hall element 1082 at a first position and a second Hall element 1084 at a second position.
  • a magnet 310 is respectively disposed on the tool housings 302 (402, 502, 602) of the four tool bodies, and their positions respectively correspond to one of the above four Hall elements to ensure that the Hall element can be mounted when the power unit 100 is mounted to the tool body.
  • the magnet 310 is sensed.
  • the magnet 310 is adjacent to the first Hall element 1082, away from the second Hall element 1084, due to the corresponding relationship between the mounting position of the Hall element and the mounting position of the magnet.
  • Three Hall element 1086 and fourth Hall element 1088 At this time, the first Hall element 1082 generates a Hall signal, and the second Hall element 1084, the third Hall element 1086, and the fourth Hall element 1088 do not generate a Hall signal.
  • the processing circuit 1080 receives the Hall signal and recognizes that the Hall signal is from the first Hall element 1082, and then the type of tool body on which the power unit 100 is mounted can be identified.
  • the identification element can also be a mechanical contact
  • the identification unit 108 includes two or more mechanical switches disposed at different positions, the position of the mechanical switch corresponding to the position of the mechanical contact.
  • the mechanical contacts on the tool body trigger mechanical switches in the corresponding positions.
  • the mechanical switch is closed after being triggered.
  • the identification unit 108 identifies the type of the tool body on which the power unit 100 is mounted, depending on the position of the mechanical switch whose state is turned off to closed.
  • the identification component can also be any other form of photoelectric switch, two-dimensional code, identification resistor, and the like.
  • FIG. 7 shows a preferred embodiment of the powerplant 100 identifying the type of power tool in a semi-automatic manner.
  • the identification unit 108 includes a processing circuit 1080 and selection elements disposed on the main housing 102 and operable manually by a user.
  • the selection element is the push switch 114.
  • Preset time In the interval, the operator presses the push switch 114 once to represent the first type of power tool on behalf of the user; presses the push switch 114 twice to indicate that the user selects the second type of power tool.
  • the push switch 114 is pressed a different number of times during the preset time, indicating that the user has selected a different type of power tool.
  • the processing circuit 1080 identifies the number of times the push switch 114 is pressed within a preset time, and the type of the power tool selected by the user can be identified. Thereby, the type of the tool body in which the power unit 100 is mounted is semi-automatically recognized.
  • the selection element can be a plurality of push switches 114 having a particular indicia, a particular indicia push switch 114, representing one type of tool body.
  • the selection component can also have a plurality of gear knobs that, when operated in a particular gear position, represent a particular type of tool body on behalf of the user.
  • the power unit 100 needs to protect the safety problems caused by its operation.
  • the circuit arrangement and the electrical connection between the power unit 100 and the tool body ensure that the power unit 100 does not work when it is independently set, and the work can be started only when the power unit 100 is mounted on the tool body, thereby avoiding
  • the power device 100 serves as a safety issue for an independent power body.
  • a circuit block diagram of several preferred embodiments of the power tool will be described by taking the power device 100 as a third preferred embodiment as an example. Those skilled in the art can understand that the electrical connection relationship between the power device 100 and the tool body embodied by the following circuit block diagram is also applicable to other embodiments of the power device 100.
  • FIG. 8 is a circuit block diagram of a first preferred embodiment of the power tool.
  • the power unit 100 includes a motor 104, an energy supply unit 112, an identification unit 108, a control circuit 110, and two electrical nodes, a third node 116 and a fourth node 118.
  • the third node 116 is electrically connected to the energy providing unit 112, and the fourth node 118 is electrically connected to the motor 104.
  • the tool body includes a start switch 308 and two electrical nodes electrically connected to both sides of the start switch 308, a first node 312 and a second node 314.
  • the start switch 308 has two states, closed and open, and can be switched from an open state to a closed state by an operator trigger.
  • the third node 116 and the fourth node 118 are in an open state, so that a closed loop has not been formed between the motor 104 and the energy supply unit 112.
  • the main housing 102 is mounted to the tool housing 302
  • the third node 116 and the fourth node 118 are electrically connected by the first node 312 and the second node 314.
  • the start switch 308 is closed, a closed loop is formed between the motor 104 and the energy supply unit 112, the energy supply unit 112 supplies energy to the motor 104, and the control circuit 110 controls the motor 104 to start rotating.
  • FIG. 9 is a circuit block diagram of a second preferred embodiment of the power tool.
  • the power unit 100 includes a motor 104, an energy supply unit 112, an identification unit 108, a control circuit 110, a start switch 115, and two electrical nodes, a third node 116 and a fourth node 118.
  • the third node 116 is electrically connected to the energy providing unit 112, and the second node 314 is electrically connected to the motor 104.
  • the start switch 115 is disposed between the energy supply unit 112 and the motor 104, and has both closed and open states. The start switch 115 can be switched from an open state to a closed state by an operator trigger.
  • the tool body includes two electrical nodes that are in communication with each other, a first node 312 and a second node 314.
  • the functions of the modules included in the power unit 100 and the tool body are the same as those of the foregoing embodiment.
  • the third node 116 and the fourth node 118 are in an open state, so that a closed loop has not been formed between the motor 104 and the energy supply unit 112.
  • the main housing 102 is mounted to the tool housing 302
  • the third node 116 and the fourth node 118 are electrically connected by the first node 312 and the second node 314.
  • the start switch 308 is closed, a closed loop is formed between the motor 104 and the energy supply unit 112, the energy supply unit 112 supplies energy to the motor 104, and the control circuit 110 controls the motor 104 to start rotating.
  • the start switch 308 is closed, and a closed loop cannot be formed between the motor 104 and the energy supply unit 112.
  • Unit 112 is unable to provide energy to motor 104 and motor 104 is inoperable.
  • the structure in which the third node 116 is disconnected from the fourth node 118 ensures that the power unit 100 cannot be started until the power unit 100 is electrically connected to the power tool, that is, before the power unit 100 is mounted on the power tool. This increases the safety of the power unit 100.
  • the electrical connection between the first node 312 and the third node 116 can be implemented in a wireless manner or in a wired manner.
  • the second node 314 is electrically connected to the fourth node 118 to establish electrical connection between the power device 100 and the tool body. connection.
  • the wired manner may be that a first connection terminal electrically connected to the first node 312 and a second connection terminal electrically connected to the second node 314 are disposed on the tool body.
  • the power device 100 is provided with a third connection terminal electrically connected to the third node 116 and a fourth connection terminal electrically connected to the fourth node 118.
  • the first connection terminal, the second connection terminal, the third connection terminal, and the fourth connection terminal may be mutually independent terminals, and the position of the first connection terminal corresponds to the position of the third connection terminal, and the position of the second connection terminal is The position of the fourth connection terminal corresponds.
  • the first connection terminal is connected to the third connection terminal, and the second connection The terminal is connected to the fourth connection terminal to establish an electrical connection between the power unit 100 and the tool body.
  • the start switch 308 is closed, and the circuit between the motor 104 and the energy supply unit 112 is turned on.
  • the first connection terminal and the second connection terminal may also be integrally provided, and accordingly, the third connection terminal and the fourth connection terminal are also disposed in a matched integral structure. It can also be realized that when the power device 100 is mounted to the tool body, the first connection terminal is connected to the third connection terminal, and the second connection terminal is connected to the fourth connection terminal, so that an electrical connection is established between the power device 100 and the tool body.
  • the present invention also provides a third preferred embodiment that when the tool housing 302 is separated from the main housing 102, the start switch 115 is closed, and a closed loop cannot be formed between the motor 104 and the energy supply unit 112 when the main housing 102 is mounted on the tool.
  • the start switch 115 is closed, and a closed loop is formed between the motor 104 and the energy supply unit 112.
  • the third preferred embodiment is different from the second preferred embodiment in that a detecting element and a switching element controlled by the detecting element are disposed between the third node 116 and the fourth node 118. When the detecting element detects that the main housing 102 is mounted to the tool housing 302, a corresponding control signal is issued to control the switching element to close.
  • the third node 116 and the fourth node 118 are electrically connected, the start switch 115 is closed, a closed loop is formed between the motor 104 and the energy supply unit 112, and the motor 104 starts to rotate.
  • the detecting element detects that the main casing 102 is not mounted on the tool housing 302, it sends a corresponding control signal to control the switching element to be disconnected.
  • the third node 116 and the fourth node 118 cannot be electrically connected, the start switch 115 is closed, a closed loop cannot be formed between the motor 104 and the energy supply unit 112, and the motor 104 cannot rotate.
  • FIG. 13 is a circuit block diagram of a fourth preferred embodiment of the power tool.
  • the power unit 100 includes a motor 104, an energy supply unit 112, a control circuit 110, and two electrical nodes, a third node 116 and a fourth node 118.
  • the third node 116 and the fourth node 118 are both electrically connected to the control circuit 110.
  • the control circuit 110 further includes a controller 1101 and a switching element 1102.
  • the tool body includes a start switch 308 and two electrical nodes electrically connected to both sides of the start switch 308, a first node 312 and a second node 314.
  • the start switch 308 is disposed on the tool housing and is operatively in a closed or open state.
  • the controller 1101 can detect that the start switch 308 is in a closed or open state by the third node 116 and the fourth node 118 being electrically connected to the first node 312 and the second node 314, respectively.
  • the controller 1101 detects that the start switch 308 is in the off state, the control switching element 1102 is in the off state, and the energy supply from the energy supply unit 112 to the motor 104 is prohibited.
  • the controller 1101 detects that the start switch 308 is in the closed state, the control switching element 1102 is in the closed state, and the energy supply from the energy supply unit 112 to the motor 104 is allowed.
  • the powerplant 100 may or may not include one or both of the identification unit 108 and the control circuit 110.
  • the control circuit 110 may have only a discharge control function, or both a discharge control function and a function of controlling the rotational motion of the motor.
  • the circuit block diagram of the power tool includes at least a control circuit and an energy supply circuit.
  • the energy supply circuit electrically connects the energy supply unit 112 and the motor 104 to form an energy transfer circuit of the energy supply unit 112 to the motor 104.
  • the energy supply circuit forms a closed loop, the energy of the energy supply unit 112 is transferred to the motor 104, which rotates.
  • the energy supply circuit forms an open circuit, the energy of the energy supply unit 112 cannot be transmitted to the motor 104, and the motor 104 stops rotating or remains stationary.
  • the energy supply circuit may alternatively be disposed in the power unit 100 or in the tool body, or may be partially disposed in the power unit 100 and another portion disposed in the tool body.
  • the control circuit may alternatively be disposed in the power unit 100 or in the tool body, or may be partially disposed in the power unit 100 and another portion disposed in the tool body.
  • the tool body and the power unit each include a part of the circuit.
  • the electrical connection between the two parts of the circuit is achieved by electrical connection of the first node 312 and the second node 314 to the third node 116 and the fourth node 118, respectively.
  • the circuit in the tool body can be simplified as the first circuit.
  • the circuit in the power unit 100 includes at least two parts, and a part of the circuit is electrically connected to the third node 116 and the fourth node 118. This part of the circuit is simplified as a second circuit. Another part of the circuit is connected to the second circuit.
  • the power unit 100 can include more other circuits or only a second portion of the circuit.
  • the tool body can contain more other circuits.
  • the first circuit and the second circuit together constitute an energy supply circuit of the energy supply unit 112 to the motor 104.
  • the start switch 308 is located in the first circuit. The start switch 308 is operatively triggered to control whether the energy providing circuit forms a closed loop. Specifically, when the power device 100 is electrically connected to the tool body and the start switch 308 is triggered to close, the energy supply circuit of the energy supply unit 112 to the motor 104 forms a closed loop, and the energy provided by the energy supply unit 112 to the motor 104 is The start switch 308 returns to the energy supply unit. When the power unit 100 is electrically connected to the tool body, but the start switch 308 is triggered to open, the energy supply circuit of the energy supply unit 112 to the motor 104 cannot form a closed loop.
  • the energy supply circuit of the energy supply unit 112 to the motor 104 is disposed in the power unit.
  • the second circuit controls the energy according to the signal of the first circuit
  • the quantity provides a circuit that forms a closed loop.
  • the first circuit includes a start switch 308 disposed on the tool housing.
  • the start switch 308 has two states of closing and opening. One end of the start switch is connected to the first node 312, and the other end is connected to the second node 314.
  • the first circuit includes a first node 312, a second node 314, a start switch 308, circuitry to connect the first node 312 and the start switch 308, and circuitry to connect the second node 314 and the start switch 308.
  • the third node 116 and the fourth node 118 are electrically connected to the first node 312 and the second node 314, respectively. It is detected by the state of the closed or open state of the start switch 308 that the operator's control command to the power tool is started or stopped. Through the electrical connection of the third node 116 and the fourth node 118 to the first node 312 and the second node 314, respectively, the activation switch 308 transmits its status information to the controller 1101, thereby obtaining an operator's control command for the power tool.
  • the controller 1101 detects that the start switch 308 is in the off state, the control switching element 1102 is in the off state, and the energy supply circuit of the energy supply unit 112 to the motor 104 is turned off.
  • the controller 1101 detects that the start switch 308 is in the closed state, the control switching element 1102 is in the closed state, and the energy supply circuit of the energy supply unit 112 to the motor 104 is closed.
  • the start switch 308 is replaced with a knob switch, the knob switch has a first state and a second state.
  • the controller 1101 controls the switch element 1102 to be in an off state, and the energy supply unit 112 to the motor 104
  • the energy supply circuit is turned off; when the knob switch is in the second state, the controller 1101 controls the switching element 1102 to be in a closed state, and the energy supply circuit of the energy supply unit 112 to the motor 104 is closed.
  • the start switch is a trigger member having a trigger state and a release state, and when the trigger member is in the release state, the controller 1101 controls the switch element 1102 to be in an off state, and the energy supply circuit of the energy supply unit 112 to the motor 104 is provided. Disconnected; when the trigger member is in the triggered state, the controller 1101 controls the switching element 1102 to be in a closed state, and the energy supply circuit of the energy supply unit 112 to the motor 104 is closed.
  • connection structure between the chain saw tool body 500, the pruning shear tool body 600, and any other tool body can refer to the connection structure between the power unit 100 and the blower tool body 300.
  • the mechanical connection between the power unit 100 and the tool body includes work The mechanical connection of the housing 302 to the main housing 102 and the connection between the motor 104 of the power unit 100 and the working component 304 of the tool body.
  • the tool housing 302 is provided with a first mounting portion 316, and the main housing 102 is provided with a second mounting portion 120.
  • the first mounting portion 316 and the second mounting portion 120 are selectively mateable with each other.
  • the main housing 102 is supported by the tool housing 302, and the tool housing 302 is relatively immovably fixed to the main housing 102.
  • FIG. 10 a preferred embodiment in which the first mounting portion 316 and the second mounting portion 120 cooperate with each other is shown.
  • the first mounting portion 316 includes a first abutting surface 318 disposed on the inner side of the tool housing 302 , a buckle 320 disposed outside the tool housing 302 , a button 322 that triggers the buckle 320 , and a guiding slot 324 that serves as a guide. Pressing the button 322 can cause the buckle 320 to be in a released state or a locked state.
  • the second mounting portion 120 includes a second abutting surface 122 , a lug 124 , and a guide rail 126 disposed outside the main housing 102 .
  • the position and number of the lugs 124 match the position and number of the snaps 320.
  • the position and number of the guide rails 126 match the position and number of the guide grooves 324.
  • the first abutting surface 318 and the second abutting surface 122 abut each other, the guide rail 126 is received in the guiding slot 324, and the buckle 320 is locked, thereby locking
  • the lug 124 is such that the tool housing 302 is relatively immovably fixed to the main housing 102.
  • the button 322 is pressed to cause the buckle 320 to be in the released state. Subsequently, the guide rail 126 of the power unit 100 is aligned with the guide groove 324 of the tool body, and the power unit 100 is pushed in the longitudinal direction of the guide groove 324 to approach the tool body to reach the position shown in FIG. The power unit 100 is further pushed until the first abutting surface 318 and the second abutting surface 122 abut each other. Subsequently, the button 322 is released to bring the buckle 320 into a locked state, so that the tool housing 302 and the main housing 102 are mounted to a state as shown in FIG. In the state shown in FIG. 12, the main casing 102 is partially housed in the tool casing 302. Preferably, at least 1/3 of the main casing 102 is received in the first mounting portion 316 of the tool housing 302. This structure makes the installation between the power unit 100 and the tool body more stable, and the center of gravity of the whole machine is more reasonable.
  • the difference from the embodiment shown in Figures 10 to 12 is that the lug 124 is replaced by a projection 124', the button 322 is replaced by a knob 322', and the buckle 320 is replaced by The bump 320' is replaced.
  • the boss 124' is provided with a turn along the outer circumference of the main casing 102.
  • the rotation of the knob 322' causes the projection 320' to abut or not abut against the projection 124'.
  • the power unit 100 is locked to the tool body.
  • the power unit 100 is movable relative to the tool body.
  • the tool housing is provided with a trigger member such as a button 322 or a knob 322 ′, and a locking member such as a buckle 320 or a protrusion 320 ′;
  • the main housing 102 is provided with A locking member lug 124 or boss 124' that cooperates with the locking member.
  • the trigger member causes the locking member to be locked by the locking member to lock the power unit 100 to the tool body.
  • the triggering member has the locking member releasing the locked member, so that the power unit and the tool body are relatively movable.
  • the mechanical connection between the power unit 100 and the tool body also includes the connection between the motor 104 of the power unit 100 and the working member 304 of the tool body.
  • Powerplant 100 includes an output shaft 106 that is coupled to motor 104.
  • the tool body includes an input shaft 306 that is coupled to the working member 304.
  • a power transmission mechanism can be selectively disposed between the motor 104 and the output shaft 106 and between the working member 304 and the input shaft 306.
  • the power transmission mechanism is a gear structure. When no power transmission mechanism is provided between the motor 104 and the output shaft 106, the motor 104 is directly connected to the output shaft 106.
  • the working member 304 When no power transmission mechanism is provided between the working member 304 and the input shaft 306, the working member 304 is directly connected to the input shaft 306.
  • the connection of the motor 104 to the working member 304 is achieved by the connection between the input shaft 306 and the output shaft 106.
  • the connection between the output shaft 106 and the input shaft 306 is detachable.
  • the output shaft 106 of the power unit 100 is mechanically coupled to the input shaft 306 of the tool body.
  • the input shaft 306 is provided with a receiving groove
  • the output shaft 106 is provided with a protrusion.
  • the receiving slot is an internal spline 326 and the tab is an external spline 128.
  • the receiving groove and the protrusion may be other structures such as a square, a flange, and the like that are not matched.
  • the power unit 100 may be such that the output shaft of the working member 304 is parallel to the output shaft of the motor 104 or
  • the coincident tool body provides power, and may also power the tool body at which the output shaft of the working member 304 is angled with the output shaft of the motor 104.
  • the output shaft of the working components of the at least two tool bodies included in the power tool system are parallel or coincident with the output shaft of the motor 104.
  • FIG. 16 is a block diagram showing a power tool system of another preferred embodiment.
  • the power unit 100 can provide motion for different types of tool bodies. force.
  • An improvement of the system is that the energy providing unit 112 includes a piggyback structure 130 through which the energy providing unit 112 can be carried by the piggyback structure 130.
  • the energy providing unit 112 also includes a flexible device 132.
  • the energy providing unit 112 is electrically and/or mechanically connected to other components of the power tool by the flexible device 132.
  • the power unit 100 may include only the motor 104.
  • the power unit 100 is detachably mounted to the tool body or detachably mounted to the energy providing unit 112 and supported by the tool body or the energy supply unit 112.
  • the energy supply unit 112 is directly electrically connected to the power device 100, and the energy supply unit 112 is connected to any one of the tool interfaces 306, 406, 506, 606 through the flexible device 132 to implement the power device.
  • the energy supply unit 112 is mechanically and/or electrically coupled to the tool body to transmit power to the tool body.
  • the energy providing unit 112 is coupled to any one of the tool interfaces 306, 406, 506, 606 by the flexible device 132 to effect mechanical and/or electrical connection of the energy providing unit 112 with the tool body.
  • the power unit 100 is directly connected to the tool body.
  • the energy providing unit 112 and the power unit 100 can achieve an indirect electrical connection through circuitry within the tool body.
  • the energy providing unit 112 and the power unit 100 can also achieve a direct electrical connection through the flexible device 132.
  • the power unit 100 may include only the motor 104 and the wiring board.
  • the power unit 100 is detachably mounted to the tool body or detachably mounted to the energy providing unit 112 and supported by the tool body or the energy supply unit 112.
  • the energy supply unit 112 is directly electrically connected to the power device 100, and the energy supply unit 112 is connected to any one of the tool interfaces 306, 406, 506, 606 through the flexible device 132 to implement the power device.
  • the energy supply unit 112 is mechanically and/or electrically coupled to the tool body to transmit power to the tool body.
  • the energy providing unit 112 is coupled to any one of the tool interfaces 306, 406, 506, 606 by the flexible device 132 to effect mechanical and/or electrical connection of the energy providing unit 112 with the tool body.
  • the power unit 100 is directly connected to the tool body.
  • the energy providing unit 112 and the power unit 100 can achieve an indirect electrical connection through circuitry within the tool body.
  • the energy providing unit 112 and the power unit 100 can also achieve a direct electrical connection through the flexible device 132.
  • the power unit 100 includes a motor 104 and an energy supply unit 112.
  • the backpack structure 130 can be disposed on the power unit 100 at this time.
  • the motor 104 is detachably mounted to the power unit 100 And supported by the power unit 100.
  • the energy supply unit 112 is directly electrically connected to the motor 104, and the power device 100 is connected to any one of the tool interfaces 306, 406, 506, 606 through the flexible device 132 to implement mechanical and/or electrical connection of the power device 100 with the tool body to the tool body. Passing power.
  • the power unit 100 in the present embodiment includes a motor 104, a wiring board, and an energy supply unit 112.
  • the backpack structure 130 can be disposed on the power unit 100 at this time.
  • the motor 104 is detachably mounted to and supported by the power unit 100.
  • the energy supply unit 112 is directly electrically connected to the motor 104, and the power device 100 is connected to any one of the tool interfaces 306, 406, 506, 606 through the flexible device 132 to implement mechanical and/or electrical connection of the power device 100 with the tool body to the tool body. Passing power.
  • a flexible buffer member is disposed between the output shaft 106 and the input shaft 306 to buffer the impact between the output shaft 106 and the input shaft 306, and the operation is stable.
  • the case where the start switch 308 is disposed on the tool housing includes the case where the start switch 308 is directly disposed on the tool housing, and also includes the case where the start switch 308 is indirectly disposed on the tool housing through the adapter member, and includes The start switch 308 is placed on the power tool by the adapter member.
  • the energy supply unit 112 of the present invention can provide a DC power source or an AC power source to the motor 104.
  • the energy supply unit 112 may be a battery pack, or an energy storage unit such as a super capacitor, or may be an integrated unit including an AC power line and an AC-DC conversion circuit.
  • the energy supply unit 112 may be an AC power line or an integrated unit including a DC power source and a DC-AC inverter circuit.
  • the circuit board of the present invention may include a hall detecting board or other detecting board that is included in the brushless motor. At this time, the circuit board is preferably disposed in the brushless motor.
  • the circuit board may also include at least one of the control circuit 110 or the identification unit 108.
  • the circuit board may also include at least two of the detection board or control circuit 110 or the identification unit 108 that is included in the brushless motor.
  • the powerplant 100 of the present invention may further include at least one of a motor and a wiring board, or the power unit 100 includes at least one of a motor and an energy supply unit.
  • the power unit of the present invention employs a long-life motor, such as a brushless motor, so that the performance of the motor can be maximized on a shared basis.
  • a long-life motor such as a brushless motor
  • the life of the battery pack is relatively free.
  • the life of the brush motor is short, and therefore, the present invention proposes that the battery pack is detachable from the main housing of the power unit.
  • the motor of the power unit is a normal motor
  • the motor of the present invention is a motor made of a special material, which can output a large power range when the rated power is constant, thereby making the tool body having a large difference in rated power,
  • the versatility of the power unit can also be achieved, further expanding the general range of the power unit.
  • the motor of the present invention is a brushless motor.
  • the motor of the present invention is preferably a motor with a high energy density, that is, the motor is smaller in the case of the same power output.
  • the present invention also provides a power unit of a fifth preferred embodiment.
  • the power unit in this embodiment is basically the same as the first preferred embodiment shown in FIG. 2.
  • the improvement is that in the embodiment, the power unit may include only a motor and does not include a control circuit.
  • the motor is a brushless motor
  • a detection circuit board for detecting the position of the rotor is disposed in the motor. As defined in this embodiment, the detection circuit board does not belong to the control circuit.
  • the present invention also provides a power unit of a sixth preferred embodiment.
  • the power device in this embodiment is basically the same as the first preferred embodiment shown in FIG. 4.
  • the improvement is that in the embodiment, the power device may include only the motor and the energy supply unit, and does not include the control circuit and the identification unit. .
  • the power device provided by the invention is detachably and selectively connected to the tool body of the following power tool to provide power thereto, pruning shears, grass cutters, hair dryers, lawn mowers, chain saws, high pressure cleaners, small Carts, ripper, snowplow, brush cutter, cultivator, leaf breaker, high branch saw, seeder, multi-function hoist.
  • the power unit provided by the present invention can also power the tool body of any other power tool.
  • the power tool with the lowest rated power is the minimum power power tool, and the power tool with the highest rated power is the maximum power power tool; the power tool with the lowest rated speed is the minimum speed power tool, and the motor with the highest rated speed The tool is the maximum speed power tool.
  • the rated speed of the power tool provided with the speed reducer refers to the output speed of the speed reducer at the rated power, and the rated speed of the power tool without the speed reducer refers to the output speed of the motor at the rated power.
  • the characteristic parameters of a typical power tool are shown in Table 1. According to the following parameters, the minimum power power tool is a pruning shear, the maximum power electric tool is a lawn mower and a chain saw, the minimum speed power tool is a pruning shear, and the maximum speed electric tool is a hair dryer.
  • the output power and output speed of the motor of the power unit must reach a certain range to provide power for the tool bodies of a plurality of different power tools. Therefore, the most basic requirement is that the motor output power range can cover the minimum power of the minimum power power tool output and the maximum power output of the power tool.
  • the motor output speed range can cover the maximum speed of the maximum speed power tool.
  • the working efficiency of the motor is required to be high, that is, the ratio of the output power of the motor to the input power is large, thereby chemistry of the DC power source can be It can convert more into mechanical energy than heat loss in the motor, thus prolonging the time for the power tool to work continuously after the energy supply unit is fully charged, also called single-pack working time.
  • the motor of the power unit has a high working efficiency within a certain range of output power and output speed.
  • the minimum value of the output power range is defined as a first preset power, and the maximum value is a second preset power.
  • the minimum value of the output speed range is defined as a first preset speed, and the maximum value is a second preset speed.
  • the power unit can alternatively power the tool body of the first power tool or the tool body of the second power tool.
  • the rated power of the first power tool is defined as a first rated power
  • the rated power of the second power tool is defined as a second rated power.
  • the power range formed by the first preset power and the second preset power must be greater than the first power rating and the second The power range of rated power.
  • the power unit is common to tool bodies for both mass-producers of the lawnmower and the blower.
  • the first rated power is 560w-600w
  • the second rated power is 800w
  • the difference between the first rated power and the second preset power is 200w-240w.
  • the working efficiency of the motor is 75% or more. Since the difference between the first rated power and the second rated power is small, more preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 80% or more. More Preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 82% or more.
  • the power device is generally used for a tool body of a power tool of a grass cutter, a hair dryer, a lawn mower, and a chain saw.
  • the first rated power is 560w to 600w
  • the second rated power is 1200w.
  • the difference between the rated power and the first rated power is 600w to 640w.
  • the operating efficiency of the motor is 75% or more. More preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 80% or more. More preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 82% or more.
  • the power device is generally used for a tool body of five kinds of power tools, such as a grass cutter, a hair dryer, a lawn mower, a chain saw, and a high pressure cleaner.
  • the first rated power is 450w
  • the second rated power is 1200w.
  • the difference between the second rated power and the first rated power is 750W.
  • the operating efficiency of the motor is 75% or more. More preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 80% or more. More preferably, when the output power of the motor is between the first rated power and the second rated power, the working efficiency of the motor is as high as 81% or more.
  • the power unit is common to the tool body of the mainstream product of the garden power tool, including all of the products in Table 1, in which case the first rated power and the second rated power are 300w and 1200w, respectively, first The difference between the rated power and the second rated power is 900W.
  • the working efficiency of the motor is 75% or more. More preferably, in the design process of the motor, it is required to output power of 300w to 1200w, and at the same time, it is required to achieve high working efficiency in the power range, resulting in excessive cost of the motor.
  • the compromise is that in the general-purpose power tools, the efficiency of the high-powered power tools is guaranteed to reach a higher value, while the power of the smaller-powered power tools is at a relatively low value.
  • the motor designed for the power unit has an operating efficiency of 75% or more when the output power is 300w-400w, and the working efficiency is 82% or more when the output power is 560w-1200w.
  • the efficiency of the motor is about 70%, and when the output power is 560 w to 1200 W, the working efficiency is 82% or more.
  • the type of the tool body of the power tool common to the power unit may be different, and correspondingly, the first power rating and the second power rating are also different.
  • the difference between the second rated power and the first rated power may also be any other value, such as 700w, 800w, 1000w, and the like.
  • the first rated power may also be other values between 200w and 400w, such as 250w, 270w, 310w.
  • the second rated work The rate can also be other values between 1000w and 1600w, such as 1100w, 1400w.
  • the motor is designed based on the above design requirements.
  • motors such as a brush motor, a brushless motor, an outer rotor motor, and an inner rotor motor.
  • the motors of the above types were separately designed and selected.
  • Different types of motors correspond to different motor platforms.
  • Motor platforms are typically numbered by outer diameter dimensions and stack thickness dimensions. Wherein the outer diameter is the diameter of the outer circumference of the rotor.
  • the stack thickness is the dimension of the stator core along the axial direction of the motor.
  • the meaning of D6325 is that the outer diameter of the motor is 63mm, and the stack thickness of the motor is 25mm; the meaning of D6425 is that the outer diameter of the motor is 64mm, and the stack thickness of the motor is 25mm; the meaning of D6415 is that the outer diameter of the motor is 64mm. And the stack thickness of the motor is 15mm; the meaning of D5030 is that the outer diameter of the motor is 50mm, and the stack thickness of the motor is 30mm. Table 2 below shows the parameters of the five typical motors designed by the present invention.
  • the output power is different.
  • the difference between the first rated power and the second rated power is more than 200w
  • the five motors can achieve a working efficiency higher than 75%.
  • the difference between the first rated power and the second rated power is 800w or more
  • the size range of the four brushless motors is 45mm-64mm for the outer diameter and 15mm-35mm for the stack.
  • the working efficiency of the three types of outer rotor brushless motors can reach more than 75%, and the size ranges of the three outer rotor brushless motors are :
  • the outer diameter is 45mm-64mm, and the stack thickness is 15mm-35mm.
  • the rated power of the target power tool based on the power unit is between 300W and 1200W, and the D5030 motor is selected.
  • the motor has a rated output of 1100w.
  • the rated output power of the motor refers to the power output value of the motor's maximum efficiency point.
  • the working efficiency is more than 75%; when the output power is between 400w and 2300w, the working efficiency is 78%.
  • the output torque interval defining the high efficiency of the motor is between the first preset torque and the second preset torque.
  • the five motors can achieve an efficiency higher than 75%.
  • the efficiency of the four types of brushless motors can reach more than 75%.
  • the size range of the four types of brushless motors is: the outer diameter is 45mm-64mm, stack thickness is 15mm-35mm.
  • the efficiency of the three types of outer rotor brushless motors can reach more than 75%.
  • the size ranges of the three outer rotor brushless motors are: The outer diameter is 45mm-64mm, and the stack thickness is 15mm-35mm.
  • the power unit is a detachable module that needs to be moved between different power tools, and some of the tools that cooperate with the power unit are hand-held power tools, these scenes require the power unit to be light in weight.
  • One of the core modules included in the power unit is the motor, and therefore, the weight of the motor is required to be light.
  • the preferred method is to increase the power density of the motor.
  • Power density refers to the ratio of the rated power of the motor to the weight. Since the material of the motor is substantially fixed, the method of increasing the power density of the motor is preferably to reduce the volume of the motor, or to increase the rated power of the motor with a certain volume. In the case of a certain volume, the outer diameter D of the rotor of the outer rotor brushless motor is larger than the outer diameter D of the rotor of the inner rotor brushless motor.
  • the outer rotor brushless motor has a power density greater than 2 w/g; more preferably, the motor has a power density greater than 2.6 w/g.
  • the above-mentioned motor in the present specification is also called an electric motor, that is, a motor that converts electric energy or other energy into mechanical energy, and the motor is named after the motor.
  • the output power of the motor (or motor) can reach more than 1200w or the output power of the motor is above the second preset power, and the volume of the motor is small, that is, in the case of reducing the volume or increasing the volume of the motor, the requirement is
  • the motor can output higher power, so that the ratio of power to volume of the motor or the ratio of power to mass of the motor is higher than that of an ordinary motor.
  • small-volume, high-power motors there has always been a technical problem that the industry has long been demanding but has not been met.
  • Small-volume, high-power motors in the case of the same output power, not only the small size and light weight of the motor itself, but when the motor is mounted on the power tool, the overall volume and mass of the power tool are reduced, especially when electric When the tool is a hand-held tool, the small size and light weight of the power tool will bring great convenience to the operator. Therefore, small-volume, high-power motors are becoming more and more popular. However, in existing motors, when the volume is relatively small, the rated power tends to be low.
  • the quality of the motor is also substantially fixed, about 400-500 g.
  • the motor can only withstand the centrifugal force generated by the rotation speed of less than 12,000 rpm when the mass is 400-500 g. Therefore, increasing the power by increasing the speed under this volume is a factor that will not be considered by the industry.
  • the embodiment provides a motor for a power tool, which can output higher power in a small volume, and the rated power of the working power is a ratio of the amount of P to the motor can reach 15.5 W/cm 3 .
  • the The rated power P of the motor is ⁇ 900w
  • the volume of the motor is v ⁇ 58cm 3 ; preferably, the P amount is ⁇ 1300w, the volume of the motor is v ⁇ 58cm 3 ; more preferably, the P amount is ⁇ 1300w, the motor
  • the volume v ⁇ 58 cm 3 understandably, since the material of the motor is basically fixed, when the volume of the motor is constant, the mass M of the motor is basically fixed.
  • the above-mentioned rated power P amount and volume ratio can also be expressed by another way, that is, the rated power of the working power is the ratio of the amount of P to the mass M of the motor can reach 2 W/g.
  • the rated power P of the motor is ⁇ 900w
  • the mass of the motor is M ⁇ 450g
  • the P amount is ⁇ 900w
  • the mass of the motor is M ⁇ 400g
  • the P amount is ⁇ 1300w
  • the mass of the motor is M ⁇ 400g.
  • a high power and small volume motor is described in the specific embodiment.
  • a motor is provided for the power tool, and the motor in this embodiment can be Outputs a large amount of power in a small volume.
  • the motor has the characteristics of light and flexible under the same power.
  • the overall volume of the power tool will be relatively small, and the corresponding quality will be lower, making the product more human. Chemical. Therefore, motors with small size and high power are becoming more and more popular.
  • the motor needs to be detachable between a variety of different power tools, such as the motor can be used on the pruning shears with rated power of 300w, the blower with rated power of 560-600w, and the grass with rated power of 800w.
  • the motor can be used on the pruning shears with rated power of 300w, the blower with rated power of 560-600w, and the grass with rated power of 800w.
  • Typical operating characteristics of typical power tools can be found in Table 1 in this manual.
  • the motor has the characteristics of small size, light weight and convenient disassembly.
  • the rated power P of the motor is increased by increasing the rotational speed N of the motor.
  • the rated rotational speed N of the motor of the present embodiment is ⁇ 12,000 rpm, and preferably, the rated rotational speed N of the motor is ⁇ 16,000 rpm. Understandably, when the rotational speed of the motor is increased, the centrifugal force of the motor is also increased. Conventional motors are prone to a series of problems due to the increase of the rotational speed, such as bearing failure, shaft breakage or magnetic tile falling off.
  • This example improves the structure of the existing motor, so that the motor can rotate at high speed, and the rated speed of the motor is ⁇ 12000 rpm or N amount ⁇ 16000 rpm, and the accumulated working life is at least 600 hours or more.
  • the motor has a rated speed N of ⁇ 12,000 rpm or N amount ⁇ 16,000 rpm, and the cumulative working life can reach more than 1000 hours.
  • the motor When the motor is used between the plurality of tool bodies described above, the motor is required to be detachably mounted to the plurality of power tools described above, and the first power tool and the second power tool are named here, and represent various types in Table 1 of the present specification.
  • the rated power of the first electric power tool is a first nominal power P f, the rated power of the second electric power tool as a second rated power PS, PS ⁇ Pf, the amount of the rated motor power P ⁇ PS, a first nominal power 300w ⁇ Pf ⁇ 1200w, the second rated power 300w ⁇ PS ⁇ 1200w.
  • the rated speed of the pruning shear is 1300 rpm, and the speed of the lawn mower is 5000-6000 rpm.
  • the rotational speed is 16,000 rpm, specifically, the rated rotational speed of other power tools, see Table 1 above in this specification.
  • the rated speed of the motor in this embodiment needs to match the speed of the power tool with the highest rated speed in the first power tool and the second power tool, or the rated speed of the motor needs to be greater than or equal to the first.
  • the highest rated speed of the power tool and the second power tool is the highest rated speed of the power tool and the second power tool.
  • the first power tool and/or the second power tool in this embodiment are further provided with a speed matching device to rotate the speed between the power tool and the motor. match.
  • the rotation speed matching device is at least one of a gear reducer, a worm reducer, a planetary gear reducer, a belt, and a timing belt.
  • the rotation speed matching device may further be an electronic control switch, and the electronic control switch changes the rotation speed of the motor by changing the input voltage or the input current of the motor, thereby matching the rotation speed of the motor with the rotation speed of the power tool.
  • the brushless motor Since the brushless motor has the advantages of high efficiency, low energy consumption, low noise, long life and simple ease of use with respect to the brush motor, the DC brushless motor is taken as an example in the embodiment, and the high power and small volume are used. The specific structure of the outer rotor brushless motor in the first preferred embodiment will be described in detail.
  • FIG. 17a is a perspective view of the motor 700a used in the embodiment.
  • the motor 700a includes a stator 701a and a rotor 702a rotatably sleeved on the outer circumference of the stator 701a.
  • the motor 700a further includes an end cover 705a at one end of the stator 701a.
  • the stator 701a is provided with a stator pass extending through the ends of the stator 701a in the axial direction.
  • the hole 7011a, the motor 700a further includes a rotating shaft 703a that passes through the stator through hole 7011a along the central axis of the stator 701a and is fixed to the rotor 702a.
  • the rotor 702a includes a barrel-shaped rotor body 7022a that is open at both ends.
  • the inner wall of the rotor body 7022a is circumferentially provided with a pole piece 704a.
  • the pole piece 704a is a permanent magnet.
  • the outer rotor diameter D ⁇ 55 mm, the stack length of the stator is L, L ⁇ 35 mm; preferably, the diameter of the rotor is 45 mm ⁇ D ⁇ 55 mm, the stator The stack length is 25 mm ⁇ L ⁇ 35 mm. More preferably, the diameter D of the rotor is 50 mm, and the stack length L of the stator is 30 mm.
  • the above-described pole piece 704a is fixed to the rotor body 7022a by means of bonding. Since the motor 700a is rotated at a high speed, the no-load rotation speed of the motor 700a reaches 12,000 rpm, or even as high as 16,000 rpm, and the centrifugal force of the pole piece 704a is large, so that the pole piece 704a is liable to fall off. In order to prevent the pole piece 704a from coming off, when the rotation speed of the motor 700a is higher, the effective bonding area between each of the pole piece 704a and the rotor body 7022a must be increased to secure the pole piece 704a and the rotor by increasing the bonding area. The adhesive force between the bodies 7022a.
  • the pole piece 704a In order to rotate the motor 700a at a high speed, the pole piece 704a does not fall off, and the larger the linear velocity V2 of the pole piece at the rated motor speed N of the motor, the larger the bonding area S of the pole piece 709a and the inner wall of the rotor. And S/V2 is greater than or equal to 6.4. Further, the linear velocity of the pole piece is V2 ⁇ 41.87 m / sec, and the effective bonding area of the pole piece is s ⁇ 272 mm 2 . Preferably, the pole piece has an effective area s ⁇ 243 mm 2 and the pole piece has a linear velocity V2 ⁇ 41.87 m / sec.
  • the number of the pole pieces 704a inside the rotor body is preferably as small as the motor 700 is the same volume, so that the corresponding bonding area of each piece of the pole pieces 704a is relatively large, and the magnetic poles Sheet 704a does not easily fall off.
  • the pole piece 704a is small, the working efficiency of the motor 700a and the torque output by the motor 700a are both affected, so that the output torque cannot meet the demand of the power tool, and the power supply is not properly applied, especially when the power supply is used.
  • the power tool has high requirements on the conversion efficiency of the motor.
  • the conversion efficiency of the motor is more than 75%.
  • the pole piece 704a of the motor must be more than 10 pieces. However, when the number of the pole pieces 704a is too large, the bonding area of the pole piece 704a is small and the pole piece 704 is easily detached under the same volume. In order to prevent the pole piece from falling off, the outer rotor diameter is within the allowable volume range of the motor 700a of the present embodiment.
  • the pole piece 704a does not exceed 20 pieces.
  • the diameter D of the rotor 702a of the motor 700a is set to 50 mm
  • the stack length L of the stator 701a is set to 30 mm
  • the number of pole pieces is set to 10 to ensure an effective pasting area of the pole piece 704a m ⁇ 272 mm 2 and the motor 700a
  • the working efficiency of the power P between 300w and 1200w is more than 75% when the motor is working.
  • the working efficiency of the motor is 80% or more.
  • the diameter D of the motor and the stack length L of the stator may be set to other values to ensure an effective pasting area, which will not be described herein.
  • the rotor 702a further includes an end cover 705a.
  • the end cover 705a is fixed to one end of the rotor body 7022a.
  • the end cover 705a includes a mating portion 7050a fastened to the rotor body 7022a and an end cap body 7052a provided with a first shaft hole 7051a.
  • the mating portion 7050a is coupled to the end cap body, and the end cap 705a rotates with the rotor 702a as the rotor 702a rotates.
  • the mating portion 7050a is specifically annular, and the mating portion 7050a is mated with the rotor body 7022a by an interference fit.
  • the mating portion 7050a may be coupled to the rotor body 7022a by other means. Fit, such as bonding, threading, or screwing.
  • the motor 700a During the operation of the motor 700a, the motor 700a itself and other peripheral structures, such as circuit boards, tend to have some heating problems. When the motor is hot, especially when the motor temperature exceeds a certain value, the pole pieces in the motor are demagnetized. , the motor is disabled and cannot be rotated. In order to better dissipate heat from the motor 700a itself or some other peripheral structure, the rotor 702a of the motor also includes a fan.
  • the fan includes a first fan for cooling the inside of the motor 700a
  • the first fan includes a blade 7071a
  • the blade 7071a is located between the end cap body 7052a and the mating portion 7050a.
  • the fixing portion 7050a is fixedly connected to the end cap body 7052a by the blade 7071a. It can be understood that the blade 7071a can also be extended outward from the end cap body 7052a. It should be noted that, in different motors, the end cover is arranged differently.
  • the motor power density when the rated power P of the motor is compared with the volume v of the motor, the motor volume v is only by the stator and The volume of the rotor body 7022a located outside the stator does not include the end cap 705a and the stator bracket 709a described above.
  • a side surface of the end cap body 7052a facing away from the mating portion 7050a is provided with a notch 7054a.
  • the notch 7054a is circumferentially disposed on the outer side of the first shaft hole 7051a, and can be lightened by the provision of the slot.
  • the quality of the end cap in motor 700a Preferably, the gap between the missing slots 7054a They are disposed at equal intervals to make the circumferential distribution of the end cap 705a uniform in mass. Avoiding noise during the rotation of the end cap 705a with the rotor due to uneven circumferential quality.
  • the gaps 7054a are equally spaced apart from each other on the outer side of the first shaft hole 7051a, and can be added in the circumferential direction corresponding to the light-weight missing slot. Or add balance mud or other materials to eliminate the noise caused by uneven circumferential quality during the rotation of the end cap.
  • the notch 7054a may also be disposed on a side of the end cap body 7052a facing the mating portion 7050a, and the slots 7054a are circumferentially spaced apart from each other.
  • the size and the size of the missing slot 7054a can be changed according to actual needs, and will not be described here.
  • the fan further includes a second fan 706a for cooling other components outside the motor 700a
  • the second fan 706a includes a fan body 7061a.
  • the fan body 7061a is provided with a functioning function corresponding to the rotating shaft 703a.
  • the fan body 7061a of the second fan 706a and the end cap body 7052a are formed to isolate the first fan.
  • a shielding surface of the second fan 706a It can be understood that other types of spacers may be disposed between the first fan and the second fan 706a for preventing the hot air inside the motor 700a from being continuously blown to other places by the second fan 706a, thereby affecting the cooling effect.
  • the above-described end cap 705a and the first fan may also adopt other configurations.
  • the end cap 705'a includes a mating portion (not shown) that is fastened to the rotor body 7022'a, and an end cap body 7052a' having a first shaft hole 7051'a, the end cap The body 7052'a and the mating portion are connected by a connecting surface 7053a' extending outward from the end cap body 7052'.
  • the end cover 705a' is provided with a slot 7055'a for allowing the wind generated by the first fan to be delivered to the inside of the motor 700'a. That is, the blades of the first fan (not shown) are not directly disposed on the end cap 705'a.
  • the stator 701a includes a stator armature (not shown) provided with a current coil, and the stator armature forms a magnetic field after being energized, and interacts with the pole piece 704a inside the rotor 702a to rotate the rotor 702a.
  • the motor 700a further includes a stator bracket 709a for mounting the motor 700a to the power tool.
  • the stator bracket 709a is fixedly connected to the power tool.
  • the stator bracket 709a can be fixedly connected to the main body of the power unit and fixedly connected to the power tool through the main housing.
  • the stator bracket 709a is tightly coupled to the stator 701a such that when the motor 700a After being mounted on the power tool, the tool head of the power tool is driven by the rotating shaft 703a to operate. Referring to FIG.
  • stator bracket 709a away from the stator 701a is fixed to the power tool, and the other end extends into the stator through hole 7011a of the motor stator 701a to form a hollow sleeve sleeved on the outer side of the rotating shaft 703a.
  • stator holder 709a is fixed to the stator 701a by a hollow sleeve located inside the stator 701a. Since the rotating shaft 703a is tightly engaged with the rotor 702a, the rotor 702a drives the rotating shaft 703a to rotate under the action of the magnetic force to drive the tool head to work.
  • the stator holder 709a is made of an aluminum material, but the stator holder 709a is easily broken when rotating at a high speed. Therefore, in the embodiment, the stator holder 709a is adapted to be rotated at a high speed.
  • the stator bracket 709a can be made primarily of aerospace aluminum material.
  • the motor 700a further includes a bearing located outside the rotating shaft 703a for rotating the rotating shaft 703a relative to other fixed members of the motor 700a.
  • the bearing includes a first bearing 7081a between the stator bracket 709a and the outer wall of the rotating shaft 703a, and the first bearing 7081a is located at one end of the stator bracket 709a near the tool body for making the rotating shaft 703a relatively Rotating on the stator bracket 709a.
  • the bearing further includes a second bearing 7082a between the inner wall of the stator through hole of the stator 701a and the outer wall of the rotating shaft 703a.
  • the support of the rotating shaft 703a to the motor 700a is The single arm beam support, the second bearing 7082a needs to bear a large load from the motor 700a with respect to the structure supported by the double wall beam; in addition, the second bearing 7082a is limited by the volume between the stator 701a and the rotating shaft 703a, and second The bearing 7082a is generally small in volume; therefore, the bearing is more prone to bearing failure problems than the motor 700a at the time of low speed rotation and the motor supported by the double wall beam when the bearing is rotated at a high speed by the load.
  • the motor can be replaced by a double-walled beam-supported motor, that is, both ends of the rotating shaft 703a of the motor 700a are fixedly connected with the main casing or the tool body, but the double-walled beam support is further Increasing the volume or weight of the motor 700a, the volume and weight of the power unit in the other embodiments described above in this specification.
  • the second bearing 7082a is a double bearing.
  • the bearing comprises a bearing seat and a ball, and the bearing seat forms a raceway for rolling the ball.
  • the double bearing can be placed side by side in two sets of bearing seats having a single raceway and a single set of balls, or can have a double roll.
  • a retaining ring is further disposed between the two juxtaposed bearings to prevent mutual interference between the two parallel bearings.
  • the bearing in this embodiment can also be a multi-bearing. I will not repeat them here.
  • the second bearing 7082a in the present invention may be a needle bearing, and the axial direction of the needle and the axis of the shaft Parallel to the direction, the needle bearing has a larger bearing area relative to the ball bearing described above, and the load on the unit area is relatively small, so the risk of failure is reduced.
  • the volume of the bearing can be increased by changing the set position of the second bearing 7082a, making it suitable for use in high speed rotation.
  • Fig. 24a is a cross-sectional view of a motor 700"a employed in a second preferred embodiment at high power, small volume.
  • the motor 700"a includes a stator 701"a and a rotatably sleeved stator 701" circumferential outer rotor 702"a, the motor further includes an end cap 705"a at one end of the motor 700"a, the motor 700"a further including the stator bracket 709"a described above.
  • the third bearing 7082"a is located in the cavity formed by the inner wall of the rotor 702"a and the outer wall of the rotating shaft 703"a, and the third bearing 7082"a is located between the stator 701"a and the end cover 705". That is, between the end of the stator 701"a away from the stator bracket 709"a and the end cover 705"a, and the second bearing 7082"a fixes the third bearing 7082"a to the shaft through the provided bearing holder 710"a. 703"a outside.
  • the bearing holder 709"a can be fixed by an interference fit with the stator through hole 7011"a of the stator 701"a, the third bearing 7082"a bearing inner wall to the third The distance of the bearing outer wall of the bearing 7082"a is greater than the distance from the outer wall of the rotating shaft to the inner wall of the stator through hole 7011"a.
  • the end cap 705"a may be the same as the end cap 705a in the first embodiment described above.
  • the difference between the end cover 705a and the fixing manner of the stator bracket and the power tool may be the same as that of the high power and small volume of the stator bracket and the power tool in the first embodiment, or may be combined with the above-mentioned high power and small volume.
  • First embodiment stator bracket and electric machine Different ways of fixing is not limited here. Other structures and characteristics of the motor may be the same as those of the above-described high power, small volume first embodiment.
  • D5030 is an outer rotor brushless motor. This structure makes its power density higher than 2W/g, and its volume is further reduced due to its rotational speed of 15000 rpm to 16000 rpm. The power density was further increased to about 2.75 w/g as it was reduced to about 400 g.
  • the motor load speed refers to the output speed of the motor under the corresponding load condition.
  • the motor load speed of the pruning shears is included. Meaning: When the output power of the motor is 300w, the output speed of the motor is 15000 rpm to 15700 rpm.
  • Table 3 Typical operating characteristic parameters of each power tool when the power unit equipped with the D5030 motor is assembled to the tool body of different power tools.
  • the working efficiency of the motor and the load speed of the motor are different. Therefore, when the power unit is mounted on a power tool with different power ratings, when the motor is operated at rated power, the working efficiency of the motor is different from the load speed of the motor. See Table 3 for specific values.
  • the input power of the motor is correspondingly reduced, and when the motor operating efficiency is constant, the output power of the motor is also lowered.
  • the principle of mechanical deceleration is to reduce the output speed of the motor through the reduction gear, without reducing the input voltage or input current of the motor.
  • the motor input power will not decrease, and the output power of the motor will not decrease if the motor operating efficiency is constant.
  • each of the power tools has a large span of the output power of the motor. For example, in one embodiment of the invention, the difference between the maximum output power and the minimum output power exceeds 900 w.
  • the present invention is preferably decelerated by a reduction gear. According to different electric workers The difference between the rated rotational speed of the motor and the rated rotational speed of the motor is set to a deceleration device having a corresponding reduction ratio, and the deceleration of the deceleration device of each electric tool is as shown in Table 3.
  • the power unit may include an energy supply unit or may not include an energy supply unit.
  • the power, energy, and weight of the power unit including the energy supply unit and the power tool to which the power unit is attached will be described below with reference to Table 4.
  • the energy supply unit is a battery pack.
  • the battery pack has a voltage of 60V and a capacity of 2 Ah, that is, the energy provided by the battery pack is 120 Wh.
  • the weight of the power unit is 2 kg to 2.1 kg. Therefore, the power device has an energy-to-weight ratio of 57 Wh/kg to 60 Wh/kg. Since the selected motor is a D5030 motor and its rated power is 1100w, the ratio of the rated power to the weight of the power unit is 523W/kg ⁇ 550W/kg.
  • the weight and energy weight ratio and power weight of each power tool to which the power unit is mounted are shown in Table 4.
  • the weight of the whole machine refers to the weight of the power tool when the power unit is mounted on the power tool.
  • the energy-to-weight ratio of the whole machine refers to the ratio of the energy provided by the battery pack to the weight of the whole machine.
  • the power-to-weight ratio of the whole machine refers to the ratio of the rated power of the whole machine to the weight of the whole machine.
  • Table 4 shows the energy-to-weight ratio and power-to-weight ratio of each power tool when the battery pack is 120Wh.
  • the battery pack has a voltage of 60V and a capacity of 4 Ah. In other words, the battery pack provides 240Wh of energy.
  • the weight of the power unit is 2.7 Kg to 2.8 Kg. Therefore, the power-to-weight ratio of the power unit is 85.7 Wh/kg to 88.9 Wh/kg.
  • the selected motor is a D5030 motor with a rated power of 1100w, the ratio of the rated power to the weight of the power unit is 392.8W/kg to 407.4W/kg.
  • the weight and energy weight ratio and power weight of each power tool to which the power unit is mounted are shown in Table 5.
  • Table 5 shows the energy-to-weight ratio and power-to-weight ratio of each power tool when the battery pack is 240Wh.
  • the powerplant does not include an energy providing unit.
  • the weight of the power unit is 0.9Kg-1.1Kg. Since the selected motor is the D5030 motor, its rated power is 1100w, so the ratio of the rated power to the weight of the power unit is 1000W/kg ⁇ 1222.2W/kg.
  • the voltage, capacity, weight of the whole machine, and the energy-to-weight ratio of the whole machine and the power-to-weight ratio of the whole machine can be referred to the data in Table 4 and Table 5.
  • the 60V in the present invention refers to the voltage when the battery pack is fully charged, specifically the voltage when the lithium battery with a nominal voltage of 54V is fully charged, that is, the lithium battery with 15 nominal voltages of 3.6V/Cell is fully charged in series. After the voltage.
  • the 60V battery pack of the present invention includes 15 series lithium batteries, each of which has a nominal voltage of 3.6V.
  • the 60V battery pack of the present invention may also be composed of any other plurality of battery cells connected in series and in parallel.
  • the range of positive and negative fluctuations of the numerical values described in the present invention is in the range expressed by the numerical values, and the numerical values recited in the present invention include the numerical values themselves and Increase or decrease by 1%.
  • a power of 800W means any value between 760W and 840W.
  • the power unit does not include an energy supply unit.
  • the power unit and the energy supply unit are disposed separately from each other and directly coupled to the tool body to be combined into a complete power tool.
  • the tool body is respectively provided with a mating portion that is coupled to the power unit and a mating portion that is coupled to the energy supply unit. Two mating parts are set independently of each other The devices are independently coupled to the energy supply unit and the power unit.
  • FIG. 17 is a structural view showing a first preferred embodiment of the tool body 700 provided by the present invention.
  • the tool body 700 includes a tool housing 701, a functional component 706, and a first mating portion 702 and a second mating portion 704 disposed on the tool housing 701.
  • the first mating portion 702 is detachably coupled to the energy supply unit 712.
  • the second mating portion 704 is detachably coupled to the power supply unit 710.
  • the functional component 706 is a pruning component.
  • the functional component 706 can also be a blowing component, a blowing component, a grassing component, a mowing component, a swing component, a reciprocating component, a snow throwing component, Cleaning components, as well as execution components of any other power tool, etc.
  • the first mating portion 702 includes a first joint portion and a first electrical interface.
  • the first joint portion is mechanically coupled to the energy supply unit 712, and the first electrical interface is electrically connected to the energy supply unit 712.
  • the second mating portion 704 includes a second joint portion and a second electrical interface, the second joint portion is mechanically coupled to the power supply unit 710, and the second electrical interface is electrically connected to the power supply unit 710.
  • the first electrical interface includes a first positive terminal electrically connected to the positive electrode of the energy supply unit 712 and a first negative terminal electrically connected to the negative electrode of the energy supply unit 712
  • the second electrical interface includes electrically connecting to the first positive terminal a second positive terminal and a second negative terminal electrically connected to the first negative terminal.
  • the first electrical interface and the second electrical interface may be electrically connected directly or indirectly through a circuit in the tool body 700.
  • the first electrical interface comprises a first positive terminal and a first negative terminal
  • the second electrical interface comprises a second positive terminal and a second negative terminal.
  • the energy of the energy supply unit 712 flows into the power supply unit 710 through the first positive terminal and the second positive terminal in turn, and then flows back to the energy supply unit 712 through the second negative terminal and the first negative terminal in sequence.
  • the first electrical interface further comprises a first signal transmission terminal group
  • the second electrical interface further comprises a second signal transmission terminal group.
  • the first signal transmission terminal group and the second signal transmission terminal group respectively include at least one signal terminal.
  • the first signal transmission terminal group and the second signal transmission terminal group may directly or indirectly transmit signals.
  • the signal can be transmitted between the first signal transmission terminal group and the second signal transmission terminal group by wire, or can be transmitted wirelessly.
  • the first letter The terminal group includes two signal terminals, one terminal transmits a signal outward, and the other terminal receives an external signal.
  • the second signal terminal group includes two signal terminals, one terminal transmits a signal outward, and the other terminal receives an external signal.
  • the first mating portion 702 and the second mating portion 704 are independent of each other and are disposed apart from each other.
  • the extending direction of the tool housing 701 is defined as the X direction in the figure, and the direction perpendicular to the X direction is defined as the Y direction.
  • the distance between the first mating portion 702 and the second mating portion 704 in the X direction is less than 20 cm. Preferably, it is less than 10 cm. More preferably, it is less than 5 cm. More preferably, the distance is 0 cm.
  • the distance between the first mating portion 702 and the second mating portion 704 in the Y direction is less than 20 cm. Preferably, it is less than 10 cm.
  • the distance between the first mating portion 702 and the second mating portion 704 is determined by the distance in the X direction and the distance in the Y direction, and the distance values in the X direction listed above and the distance values in the Y direction can be arbitrarily combined.
  • the tool body 700 also includes an operating component 708.
  • the operating assembly 708 can be a component that is held or operated by a user during operation of the power tool, such as a handle, switch, or the like.
  • the first mating portion 702 and the second mating portion 704 are both disposed adjacent to the operating component 708.
  • FIG. 18 is a structural view of a second preferred embodiment of the tool body 700.
  • the structure of the tool body 700 is substantially the same as that of the embodiment shown in FIG. 17, except that in the embodiment, the position of the first mating portion 702 on the tool housing 701 is close to the operation component 708.
  • the position of the second mating portion 704 on the tool housing 701 is close to the position set by the functional component 706.
  • the first mating portion 702 and the second mating portion 704 may both be disposed adjacent to the functional component 706, or the first mating portion 702 is disposed adjacent to the functional component 706, and the second mating portion 704 is adjacent to the operational component 708. Settings.
  • the present invention also provides a power tool including a tool body 700, an energy supply unit 712, and a power supply unit 710.
  • the power supply unit 710 includes a motor and a circuit board A that controls the operation of the motor.
  • the energy supply unit 712 includes a plurality of battery cells and a circuit board B that monitors discharge states of the plurality of battery cells.
  • a circuit board C that connects the electrical connection between the energy supply unit 712 and the power supply unit 710 is disposed in the tool housing 701.
  • the motor in this embodiment can be the motor described in the foregoing section of the present specification.
  • the circuit board A controls the operation of the motor, such as speed regulation, steady speed, forward and reverse, Reverse self-stop, forward rotation, self-stop, pulse function, etc.; circuit board B monitors the discharge state of a plurality of battery cells, such as detecting the voltage of the battery unit, the package voltage of the energy supply unit 712, the temperature, the discharge current, etc.; The discharge process of the energy supply unit 712 is controlled, such as overcurrent protection, overdischarge protection, overtemperature protection, and the like.
  • the circuit board C does not have any control function, only electrically connects the circuit board A and the circuit board B; the circuit board A controls the operation of the motor, and controls the discharging process of the energy supply unit 712; the circuit board B Monitor the discharge status of multiple battery cells.
  • the circuit board A detects the operating state of the motor, such as the rotational speed, phase, etc.; the circuit board B monitors the discharge state of the plurality of battery cells; the circuit board C controls the operation of the motor and the discharging process of the energy supply unit 712 .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

La présente invention concerne un moteur (700a) utilisé pour un outil électrique. Le moteur (700a) comprend un stator (701a), un rotor (702a) pouvant tourner par rapport au stator (701a), une pièce polaire (704a) fixée dans le moteur (700a), un arbre rotatif (703a), et un support de stator (709a) utilisé pour fixer le stator (701a) à l'outil électrique. Le moteur (700a) génère un champ magnétique après que le moteur (700a) est mis en marche, et interagit avec la pièce polaire (704a) pour permettre au rotor (702a) de tourner. L'arbre rotatif (703a) est relié fixement au rotor (702a), et tourne avec le rotor (702a), de façon à entraîner un composant de travail de l'outil électrique pour exécuter un travail associé. Le volume du moteur (700a) est v, la puissance du moteur (700a) en fonctionnement est P, la puissance nominale du moteur (700a) est Pnominale, et la proportion de la puissance nominale Pnominale du moteur (700a) au volume v du moteur (700a) est k, k ≥ 16.5 W/cm3. La densité de puissance du moteur est améliorée.
PCT/CN2017/093239 2016-07-15 2017-07-17 Moteur et outil électrique WO2018010699A1 (fr)

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