CN107979254A

CN107979254A - A kind of motor and electric tool

Info

Publication number: CN107979254A
Application number: CN201710582795.5A
Authority: CN
Inventors: 张伟; 李伟锋; 李光
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2016-07-15
Filing date: 2017-07-17
Publication date: 2018-05-01
Also published as: WO2018010699A1

Abstract

The present invention relates to a kind of motor, for electric tool, the motor includes stator, relative to the rotatable rotor of stator, it is fixed on the pole piece of motor internal, shaft and the stator support for stator to be fixed on to electric tool, the motor produces magnetic field and rotates rotor with pole piece interaction after powered up, the shaft is fixedly connected with the rotor, and rotated with the rotor, to drive the workpiece of electric tool to perform related work, the volume of the motor is v, power during the motor work is P, the rated power of motor is P_Volume, the rated power P of the motor_VolumeRatio with the volume v of motor is k, k >=16.5w/cm³.By improving the power density of motor, it not only can reduce the volume of motor itself and quality, can also make volume and the quality reduction for being provided with the electric tool of motor, be convenient for carrying electric tool.

Description

A kind of motor and electric tool

Technical field

The present invention relates to a kind of motor, especially a kind of motor for being used to drive electric tool to work.

It is especially a kind of with the electronic of the motor for driving electric tool work the invention further relates to a kind of electric tool Instrument.

The present invention relates to a kind of tool body.The invention further relates to a kind of electric tool.

Background technology

It is installed on existing in the electric machine structure of electric tool, when the rated power of electric tool is in more than 900w, Due to power of motor P, P=K*D2*L*N, wherein K is constant.The folded length for the stator that D is the root diameter of motor, L is motor, N is the rotating speed of motor.From the formula, increase speed, any one in folded thick or outside diameter, you can increase the work(of motor Rate exports.After being improved due to the rotating speed N of motor, centrifugal force is larger suffered by motor, and under larger centrifugal force effect, motor holds Easily there is more problem, bearing failure, the fracture of such as motor.Therefore, in the prior art by increasing the motor of motor Volume improves rotating speed, and when power reaches 900w or so, the diameter D of rotor is probably in more than 60mm, the long L of stator stack Probably in more than 40mm.Therefore, the power ratio of motor is relatively low in unit volume or under Unit Weight, that is, the power of motor is close Degree is than relatively low.In this way, not only make that the volume of motor itself is big, weight is high, when motor is installed on electric tool or some other When instrument, equipment, the volume of corresponding electric tool or some other instrument and weight can be made bigger.Especially when When these instruments are handheld tool, because the volume of instrument is larger and instrument quality is heavier, brought greatly to operator It is inconvenient.

Traditional electric tool includes workpiece, motor, transmission mechanism, starting switch, control circuit, energy offer Unit etc., closes starting switch, and the circuit that energy is provided between unit and motor is connected, and control circuit control motor starts to turn Dynamic, the rotation of motor is passed to workpiece by transmission mechanism, performs corresponding work.Wherein, when energy provides unit as electricity When pond is wrapped, battery pack is removably connected with electric tool.

Traditional electric tool there are the problem of be, each electric tool be both needed to set motor, energy provide unit, The modules such as control circuit.When a user buys the different electric tool of N kinds, its cost paid is equivalent to N number of motor, N A control circuit, N number of energy provide unit, the summation of the cost of N number of workpiece.But under normal conditions, user is in certain a period of time A kind of electric tool is used only in quarter so that other N-1 kind electric tools leave unused, i.e. other N-1 motor, N-1 control electricity Road, N-1 energy provide unit and are in idle state.Such a present situation significantly reduces the input-output ratio of user.It is based on This, proposes to develop a kind of new electric tool, motor, control circuit is made a generally applicable component, which can lead to For a variety of different electric tools, so as to improve motor, the utilization rate of control circuit, and then the input and output of user are improved Than.

To realize that said motor is general between different electric tools, maximum difficulty is, different electric tools Power, rotating speed, moment of torsion, efficiency etc. require different, and it is efficient how motor is realized under different power, rotating speed, moment of torsion Rate, while how taking into account work efficiency requirement of the instrument of minimum power to motor, realizes the work on the instrument of peak power When making, ensure the problems such as motor does not burn machine, how to meet the maximum (top) speed and minimum speed of different tool demands.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of motor, and motor is under unit volume volume or unit mass Exportable higher power.

In order to solve above-mentioned technical problem, technical scheme is as follows：

The present invention also provides a kind of motor, for electric tool, the motor includes stator, rotatable relative to stator Rotor, shaft and the stator support for stator to be fixed on to electric tool, the motor produce magnetic field after powered up, The rotor rotates under the influence of a magnetic field, and the shaft is fixedly connected with the rotor, and turns with the rotor Dynamic, to drive the workpiece of electric tool to perform related work, the volume of the motor is v, the work(when motor works Rate is P, and the rated power of motor is P_Volume, the rated power P of the motor_VolumeRatio with the volume v of motor is k, k >=16.5w/ cm³。

Preferably, rated power 960w≤P of the motor_Volume≤ 1440w, 58 cm of volume of the motor³≤v≤ 83.1cm³。

Preferably, the rated power P of the motor_VolumeFor 1200w.

Preferably, the motor is external rotor electric machine.

Preferably, the rotor includes the tubular rotor body of both ends open, is set on the inner wall of the rotor body There is a pole piece, the rotor body is sheathed on the stator exterior, and the outside diameter of the rotor body is D, 45mm≤D≤ 55mm；The stator includes the stator through hole axially through stator interior, and folded a length of L of the stator, 25mm≤L≤ 35mm；The shaft is fixedly connected through stator through hole and with the rotor body；Rated power 960w≤P of the motor_Volume ≤1440w。

Preferably, the diameter D of the rotor body is 50mm, and the folded long L of the stator is 30mm.

Preferably, rotating speed is N during the motor work, and Rated motor rotating speed is N_Volume, 12800 revs/min≤N_Volume≤19200 Rev/min.

Preferably, the motor 12800 revs/min≤N of rotating speed at work_Volume≤ 19200 revs/min, the cumulative activation of motor Service life is t, 1000 it is small when≤t≤1500 it is small when.

Preferably, the motor is brushless electric machine.

Preferably, one end of the stator support is fixedly connected with the stator, and the other end is connected with electric tool, is used Motor is fixed on electric tool by stator support, the motor further includes the bearing being arranged on the outside of shaft, the axis Contract the clutch shaft bearing included between stator support and shaft outer wall, and the clutch shaft bearing close to stator support with it is electronic One end that instrument is fixed.

Preferably, the shaft runs through the both ends of the stator support, and the one end of the stator support away from stator is fixed In the electric tool, and formed and be sheathed on the outside of the shaft from the end along stator through hole to stator through hole internal stretch Hollow sleeve, the stator support is fixed by the hollow sleeve in the stator through hole with the stator, described Clutch shaft bearing is located between shaft outer wall and the inner wall for the hollow sleeve being sheathed in shaft.

Preferably, the component of the stator support includes aircraft aluminum material.

Preferably, the bearing includes second bearing between stator through-hole wall and shaft outer wall, and described second Bearing is making shaft can be relative to stator rotation.

Preferably, the second bearing is made of two or more bearing arranged side by side.

Preferably, the second bearing is made of two ball bearings arranged side by side, between described two ball bearings arranged side by side Equipped with baffle ring, to prevent from interfering between two bearings arranged side by side.

Preferably, the second bearing is needle bearing, and the axial direction of the needle roller is parallel with the axial direction of shaft.

Preferably, the rotor further includes the end cap positioned at rotor body one end, and the end cap is fixed on rotor body One end away from stator support, the motor further include the formed positioned at rotor through-hole wall and shaft outer wall in cavity Three bearings, and the 3rd bearing is located between the stator one end and end cap away from stator support.

Preferably, the distance of the 3rd bearing inner wall to 3rd bearing outer wall is led to more than or equal to shaft outer wall to stator The distance of hole inner wall.

Preferably, the 3rd bearing with the bearing fixed frame of the stator immovable fitting by being fixed.

Preferably, the stator includes the stator armature equipped with hot-wire coil, and the stator armature produces magnetic after powered up Field simultaneously rotates motor by magnetic field and pole piece interaction, and the quantity of the pole piece is more than or equal to 10.

Preferably, the power input to a machine is P1, and the output power of motor is P2, and the efficiency of motor is η, η= When P2/P1, output power 300w≤P≤1200w when motor works, η >=75%.

Preferably, during the power of motor 500w≤P≤1200w, the efficiency of the motor is η >=80%.

Preferably, the pole piece is in Rated motor rotating speed N_VolumeUnder corresponding linear velocity V2 it is bigger, then the pole piece and The bonding area S of rotor inner wall is bigger, and S/V2 is more than or equal to 6.4, to increase the bonding between pole piece and rotor inner wall Power.

Preferably, the quantity of the pole piece is n1, n1≤20.

Preferably, the quantity n1 of the pole piece is 10, the meter per second of the linear velocity V2 of pole piece≤41.87, and the magnetic Effective bonding area s >=272 square millimeter of pole piece.

Preferably, the motor is mounted at least two electric tools, be respectively the first electric tool and Second electric tool, the rated power of first electric tool is the first rated power P_f, the specified work(of the second electric tool Rate is the second rated power P_f, P_S≥P_f, the rated power P of the motor_Volume≥P_S。

Preferably, the first rated power P_fBetween 300w to 1200, the second rated power P_SFor 300w extremely Between 1200w, as the Pf≤P≤P_SWhen, the work efficiency of the motor is more than 75%.

Preferably, the motor includes stator and can include magnetic pole relative to the rotor of stator rotation, the rotor Piece, the stator include stator armature, and after powered up, the stator armature produces magnetic field and the pole piece to the motor Interaction rotates rotor, and the quantity of the pole piece is more than 10.

Preferably, the motor is external rotor electric machine, and the rotor includes the rotor body of the tubular in both ends open, The rotor body is sheathed on the outside of the stator, and the pole piece is located on the inner wall of rotor body, and the pole piece Quantity be no more than 20.

Preferably, first electric tool and/or the second electric tool are equipped with rotating speed coalignment, to make electricity The rotating speed of machine and the rotational speed matches of electric tool.

Preferably, the rotating speed coalignment for gear reduction unit, worm reducer, planetary reducer, belt with And at least one of synchronous belt.

Preferably, the rotating speed coalignment is electronic control switch, and the electronic control switch is by reducing motor Input voltage or input current reduce the rotating speed of motor, and then make the rotational speed matches of motor speed and electric tool.

The present invention also provides a kind of motor, the motor include stator, relative to the rotatable rotor of stator, be fixed on Pole piece, shaft and the stator support for stator to be fixed on to electric tool of motor internal, the motor is after powered up Producing magnetic field and rotate rotor with pole piece interaction, the shaft is fixedly connected with the rotor, and with institute State rotor to rotate together, to drive the workpiece of electric tool to work, the quality of the motor is M, the motor work Output power when making is P, and the rated power of motor is P_Volume, the rated power P of the motor_VolumeWith the mass M of the motor Than for ρ, ρ >=2.4w/g.

Preferably, output power 960w≤P is allowed during the motor work_Volume≤ 1440w, the quality 350 of the motor≤ M≤450g。

The present invention also provides a kind of electric tool, the electric tool includes tool housing, the work supported by tool housing Make component, gripping handle and above-mentioned motor, the motor is used to drive the workpiece of electric tool to perform related work Make.

Power can be provided the technical problem to be solved in the present invention is to provide a kind of for the tool body of different electric tools Power set.

In order to solve above-mentioned technical problem, technical scheme is as follows：A kind of power set, can be electronic The tool body of instrument provides power, and the tool body includes, tool housing, and the work supported by the tool housing Make component；The power set include, main casing, the motor and wiring board supported by the main casing；The main casing can It is removably installed with the tool housing, when the main casing is installed on the tool housing, the workpiece can be by The motor driving.

Preferably, the power set further include the energy offer unit that energy is provided for motor, and the energy provides single Member includes bearing structure, and energy can be provided to unit by bearing structure bears in operator's back.

Preferably, the energy provides unit and further includes flexible apparatus, and flexible apparatus is connected to tool housing or main casing So that the energy provides unit and is electrically connected with the motor.

Preferably, the wiring board includes recognition unit and control unit, and the recognition unit identification is filled with the power The type of the tool body of installation is put, and generates and is sent to control circuit with the corresponding signal of tool body type；The control Circuit processed, motor output and the rotary motion of tool body type matching are controlled according to the signal of recognition unit transmission.

Preferably, the rated output power of the power set is 200w to some numerical value between 2500w.

Preferably, the power set further include the energy offer unit that energy is provided for motor, and the energy provides single Member is removably supported by the main casing.

The present invention also provides a kind of power set, and power, the instrument master can be provided for the tool body of electric tool Body includes, tool housing, and the workpiece supported by the tool housing；The power set include, main casing, by The motor of the main casing support；The main casing can be removably installed with the tool housing, when the main casing is pacified During loaded on the tool housing, the workpiece can be driven by the motor.

The present invention also provides a kind of electric tool, including tool body and power set, the power set are the work Have main body and power is provided, the tool body includes, tool housing, and the workpiece supported by the tool housing；Institute Stating power set includes, main casing, the motor and wiring board supported by the main casing；The main casing can be with the work Tool housing is removably installed, and when the main casing is installed on the tool housing, the workpiece can be by the motor Driving.

Preferably, the electric tool further includes the energy offer unit that energy is provided for motor, and the energy provides single Member includes bearing structure, and energy can be provided to unit by bearing structure bears in operator's back.

Preferably, the wiring board further includes recognition unit and control circuit, the recognition unit identification and the power The type of the tool body of device installation, and generate and be sent to control circuit with the corresponding signal of tool body type；It is described Control circuit, motor output and the rotary motion of tool body type matching are controlled according to the signal of recognition unit transmission.

Preferably, the tool body further includes the gripping handle supported by the tool housing, the workpiece by During the motor driving, the gripping handle is gripped by operator.

Preferably, the electric tool still further comprises starting switch, when the tool housing and the main casing point From when, close the starting switch, the motor and the energy can not form closed circuit between providing unit, when described When main casing is installed on the tool housing, the starting switch is closed, the motor and the energy provide shape between unit Into closed circuit.

Preferably, the electric tool further includes the energy offer unit that energy is provided for motor, and the energy provides single Member is removably supported by the main casing or the tool housing supports.

The present invention also provides a kind of electric tool, including tool body and power set, the power set are the work Have main body and power is provided, the tool body includes, tool housing, and the workpiece supported by the tool housing；Institute Stating power set includes, main casing, the motor supported by the main casing；The main casing can with the tool housing Releasably install, when the main casing is installed on the tool housing, the workpiece can be driven by the motor.

The present invention also provides a kind of electric tool system, including power set and at least two tool bodies, the power Device can provide power at least two tool body, each instrument master at least two tool body Body includes, tool housing, and the workpiece supported by the tool housing；The power set include, main casing, by The motor and wiring board of the main casing support；The main casing can be removably installed with the tool housing, when described When main casing is installed on the tool housing, the workpiece can be driven by the motor.

Preferably, the electric tool includes energy offer unit, and the energy, which provides unit, to be included bearing structure, is led to Cross to bear structure energy can be provided to unit and bear in operator's back.

Preferably, the wiring board includes recognition unit and control circuit, and the recognition unit identification is filled with the power The type of the tool body of installation is put, and generates and is sent to control circuit with the corresponding signal of tool body type；The control Circuit processed, motor output and the rotary motion of tool body type matching are controlled according to the signal of recognition unit transmission.

Preferably, the electric tool includes energy offer unit, and the energy provides unit removably by the master Housing supports.

The present invention also provides a kind of electric tool system, including power set and at least two tool bodies, the power Device can provide power at least two tool body, each instrument master at least two tool body Body includes, tool housing, and the workpiece supported by the tool housing；The power set include, main casing, by The motor of the main casing support；The main casing can be removably installed with the tool housing, when the main casing is pacified During loaded on the tool housing, the workpiece can be driven by the motor.

The present invention also provides a kind of power set, and power, the instrument master can be provided for the tool body of electric tool Body includes, tool housing, and the workpiece supported by the tool housing；The power set are by main casing, by described The motor and wiring board composition of main casing support；The power set can be detachably connected with the tool body, works as institute When stating power set and being connected with the tool body, the workpiece can be driven by the motor.

The present invention also provides a kind of power set, and power, the instrument master can be provided for the tool body of electric tool Body includes, tool housing, and the workpiece supported by the tool housing；The power set are by main casing, by described The motor composition of main casing support；The power set can be detachably connected with the tool body, when the power fills Put when being connected with the tool body, the workpiece can be driven by the motor.

The present invention also provides a kind of electric tool, including tool body and power set, the power set are the work Have main body and power is provided, the tool body includes, tool housing, and the workpiece supported by the tool housing；Institute Power set are stated by main casing, the motor and wiring board supported by the main casing forms；The power set can with it is described Tool body is detachably connected, and when the power set are connected with the tool body, the workpiece can be by described Motor drives.

The present invention also provides a kind of electric tool, including tool body and power set, the power set are the work Have main body and power is provided, the tool body includes, tool housing, and the workpiece supported by the tool housing；Institute Power set are stated by main casing, the motor supported by the main casing forms；The power set can be with the tool body Detachably connected, when the power set are connected with the tool body, the workpiece can be driven by the motor It is dynamic.

The present invention also provides a kind of electric tool system, including power set and at least two tool bodies, the power Device can provide power at least two tool body, each instrument master at least two tool body Body includes, tool housing, and the workpiece supported by the tool housing；The power set are by main casing, by described The motor and wiring board composition of main casing support；The power set can be detachably connected with the tool body, works as institute When stating power set and being connected with the tool body, the workpiece can be driven by the motor.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing is removably installed in the tool body and the second electric tool of the first electric tool Tool body, the rated power of first electric tool is the first rated power, the specified work(of second electric tool Rate is the second rated power, and the difference of the first rated power and the second rated power is more than 200W, when the main casing is installed When the tool body of first electric tool, the tool body of first electric tool is driven by the motor, institute The work efficiency for stating motor is more than 75%；When the main casing is installed on the tool body of second electric tool, institute The tool body for stating the second electric tool is driven by the motor, and the work efficiency of the motor is more than 75%.

Optionally, the difference of first rated power and the second rated power is more than 800w.

Optionally, first rated power is 200W between 400W, the second rated power for 1000W to 1400W it Between.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing can be with the tool body of first electric tool and the work of the second electric tool Tool main body is removably installed, and when the main casing is installed on the tool body, the tool body is driven by the motor It is dynamic, the output power of the motor for the first predetermined power between the second predetermined power when, the work efficiency of the motor is More than 75%, the difference of the first predetermined power and the second predetermined power is more than 200W.

Optionally, first predetermined power is more than 350W, and second predetermined power is less than 2500W.

Optionally, first predetermined power is more than 400w, when the second predetermined power is less than 2300w, the work effect of motor Rate is more than 78%.

Optionally, the output power of the motor for 600w between 800w when, the work efficiency of motor for 80% with On.

Optionally, the motor is outer rotor brushless motor.

Optionally, the rotor diameter of the outer rotor brushless motor is 45mm~64mm, stator stack thickness for 15mm~ 35mm。

Optionally, the rotor diameter of the outer rotor brushless motor is 45mm-55mm, stator stack thickness 25mm-35mm.

Optionally, between the no-load speed of the motor is 15000 revs/min~16000 revs/min.

Optionally, the weight of the motor is between 350g~450g.

The present invention also provides a kind of electric tool system, it is characterised in that the electric tool system includes at least first The tool body of the tool body of electric tool and the second electric tool, and can be alternatively the work of the first electric tool The power set of the tool body offer power of main body and the second electric tool are provided；The rated power of first electric tool For the first rated power, the rated power of second electric tool is the second rated power, the first rated power and the second volume The difference for determining power is more than 200W；When the main casing is installed on the tool body of first electric tool, described The tool body of one electric tool is driven by the motor, and the work efficiency of the motor is more than 75%；When the main casing When being installed on the tool body of second electric tool, the tool body of second electric tool is driven by the motor Dynamic, the work efficiency of the motor is more than 75%.

The present invention also provides a kind of electric tool system, the electric tool system includes at least the first electric tool The tool body of tool body and the second electric tool, and can be alternatively the tool body of the first electric tool and the The tool body of two electric tools provides the power set of power；It is described when the main casing is installed on the tool body Tool body is driven by the motor, the output power of the motor for the first predetermined power between the second predetermined power when, The work efficiency of the motor is more than 75%, and the difference of the first predetermined power and the second predetermined power is more than 200W.

Optionally, for first rated power between 560w~600w, the power set are installed to the first electronic work When on the tool body of tool, the work efficiency of the motor is more than 82%.

Optionally, for first rated power between 400w-500w, the power set are installed to the first electronic work When on the tool body of tool, the work efficiency of the motor is more than 82%.

Optionally, first rated power is 750w-850w, and the power set are installed to the first electric tool When on tool body, the work efficiency of the motor is more than 84%.

Optionally, first rated power is 1100w-1300w, and the power set are installed to the first electric tool Tool body on when, the work efficiency of the motor is more than 85%.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing is removably installed in the tool body and the second electric tool of the first electric tool Tool body, the output torque of the motor for the first predetermined torque between the second predetermined torque when, the work of the motor It is more than 75% to make efficiency, and the difference of the first predetermined torque and the second predetermined torque is more than 0.5NM.

Optionally, when the output torque of the motor is between 0.2NM~2NM, the work efficiency of the motor is 75% More than.

Optionally, when the output torque of the motor is between 0.25NM~1.8NM, the work efficiency of the motor is More than 78%.

Optionally, the motor is outer rotor brushless motor.

Optionally, the rotor diameter of the outer rotor brushless motor is between 45mm~64mm, stator stack thickness for 15mm~ Between 35mm.

Optionally, the rotor diameter of the outer rotor brushless motor is between 45mm-55mm, stator stack thickness 25mm- Between 35mm.

Optionally, the weight of the motor is between 350g~450g.

The present invention also provides a kind of electric tool system, it is characterised in that the electric tool system includes at least first The tool body of the tool body of electric tool and the second electric tool, and can be alternatively the work of the first electric tool The power set of the tool body offer power of main body and the second electric tool are provided；The power set are such as claim 19- Power set described in 26 any one.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing is removably installed in the tool body and the second electric tool of the first electric tool Tool body, the rated power of first electric tool is the first rated power, the specified work(of second electric tool Rate is the second rated power, and the first rated power is differed with the second rated power, and the motor is outer rotor brushless motor.

Optionally, the difference of first rated power and the second rated power is more than 200W.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing can be removably installed with the tool body, when the main casing is installed on institute When stating tool body, the tool body is driven by the motor, and the output torque of the motor is the first predetermined torque to the Between two predetermined torques, the first predetermined torque is differed with the second predetermined torque, and the motor is outer rotor brushless motor.

Optionally, the difference of first predetermined torque and second predetermined torque is more than 0.5NM.

Optionally, the motor is outer rotor brushless motor.

Optionally, the weight of the motor is between 350g~450g.

The present invention also provides a kind of electric tool system, it is characterised in that the electric tool system includes at least first The tool body of the tool body of electric tool and the second electric tool, and can be alternatively the work of the first electric tool The power set of the tool body offer power of main body and the second electric tool are provided；The power set are such as claim 28- Power set described in 39 any one.

The present invention also provides a kind of power set, tool body that can be at least alternatively for two kinds of electric tools provides Power, it is characterised in that the power set include, main casing, and the motor supported by the main casing；The main casing Body can be removably installed with the tool body of the electric tool, when the main casing is installed on the electric tool During tool body, the tool body of the electric tool is driven by the motor, the weight of the motor for 350g~450g it Between.

Optionally, the output power of the motor and the ratio of weight are more than 2.6w/g.

Optionally, the power set further comprise energy-storage units, and the voltage of the energy-storage units is more than 60V.

Optionally, the weight of the power set is 2Kg~2.1Kg, the rated output power of the power set with again The ratio of amount is 523w/Kg~550w/Kg.

Optionally, the weight of the power set is 2Kg~2.1Kg, the output energy of the power set and weight Ratio is 57Wh/kg~60Wh/kg.

The present invention also provides a kind of electric tool system, it is characterised in that the electric tool system includes at least two kinds The tool body of electric tool, and at least alternatively the power of power can be provided for the tool body of two kinds of electric tools Device, the power set are foregoing power set.

Can be alternatively at least the tool body of the first electric tool and the present invention also provides a kind of power set The tool body of two electric tools provides power, it is characterised in that and the power set include, main casing, and by the master The motor of housing support；The main casing can be removably installed with the tool body, when the main casing is installed on institute When stating tool body, the tool body is driven by the motor, and the no-load speed of the motor is more than 10000 revs/min.

Optionally, between the no-load speed of the motor is 15000~16000 revs/min.

Optionally, the motor weighs less than 500g.

The present invention also provides a kind of electric tool system, it is characterised in that the electric tool system includes at least first The tool body of the tool body of electric tool and the second electric tool, and can be alternatively the work of the first electric tool Have the power set of the tool body offer power of main body and the second electric tool, the power set are foregoing dynamic Power apparatus.

Optionally, the rated speed of first electric tool is the first preset rotation speed, the volume of second electric tool It is the second preset rotation speed to determine rotating speed, the difference of first preset rotation speed and second preset rotation speed for 7000 revs/min with On.

Optionally, the tool body of first electric tool includes reduction box, the input terminal and motor of the reduction box Output axis connection, the output speed of motor is converted to the rotating speed that suitable first electric tool exports by the reduction box, The output speed of second electric tool and the output speed of motor are essentially identical.

Optionally, first electric tool is shrub and hedge trimmer, and the speed reducing ratio of the reduction box is 12:1~13:1；Or institute It is grass-mowing machine to state the first electric tool, and the speed reducing ratio of the reduction box is 2.3:1~3:1；Or first electric tool is to cut Careless machine, the speed reducing ratio of the reduction box is 4.4:1~5.2:1；Or first electric tool is chain saw, the reduction box Speed reducing ratio is 2：1~6:1；Or first electric tool is jetting machine, the speed reducing ratio of the reduction box is 4.5:1~ 6.4:1。

Optionally, the tool body of first electric tool includes the first reduction box with the first speed reducing ratio, described The tool body of second electric tool includes the second reduction box with the second speed reducing ratio, first speed reducing ratio and described Second speed reducing ratio is any one in following ratio：12:1~13:1, or 2.3:1~3:1, or 4.4:1~5.2:1, or 2： 1~6:1, or 4.5:1~6.4:1.

Brief description of the drawings

Fig. 1 is the structure chart of the electric tool system of a better embodiment；

Fig. 2 is the structure diagram of the better embodiment of power set first shown in Fig. 1；

Fig. 3 is the structure diagram of the better embodiment of power set second shown in Fig. 1；

Fig. 4 is the structure diagram of the better embodiment of power set the 3rd shown in Fig. 1；

Fig. 5 is the structure diagram of the better embodiment of power set the 4th shown in Fig. 1；

Fig. 6 is the schematic diagram of the first better embodiment of the type of the main body of power set identification facility shown in Fig. 4；

Fig. 7 is the schematic diagram of the second better embodiment of the type of the main body of power set identification facility shown in Fig. 4；

Fig. 8 is the schematic diagram of the first better embodiment of the electric connection of power set shown in Fig. 1 and tool body；

Fig. 9 is the schematic diagram of the second better embodiment of the electric connection of power set shown in Fig. 1 and tool body；

Figure 10 is the schematic diagram of a better embodiment of the connection structure of power set shown in Fig. 1 and tool body；

Figure 11, which is power set shown in Figure 10, is in schematic diagram during installation with tool body；

Figure 12 is the schematic diagram that power set shown in Figure 10 are installed with tool body；

Figure 13 is the schematic diagram of the 4th better embodiment of the electric connection of power set shown in Fig. 1 and tool body；

Figure 14 is the schematic diagram of another better embodiment of the connection structure of power set shown in Fig. 1 and tool body；

Figure 15 is the schematic diagram that power set shown in Figure 14 are installed with tool body；

Figure 16 is the structure chart of the electric tool system of a better embodiment；

Figure 17 is the structure chart of the first preferred embodiment of tool body provided by the invention；

Figure 18 is the structure chart of the second preferred embodiment of tool body provided by the invention；

Figure 19 is the structure chart of the 3rd preferred embodiment of electric tool provided by the invention；

Figure 20 is the stereogram of motor in the first better embodiment under high-power, small size；

Figure 21 is the sectional view of Figure 20；

Figure 22 is the stereogram of the rotor body of motor shown in Figure 20；

Figure 23 is the stereogram of the end cap of motor shown in Figure 20；

Figure 24 is the structure diagram of end cap when short slot is arranged at end cap other positions；

Figure 25 is the second fan stereogram of motor shown in Figure 20；

Figure 26 is the part-structure schematic diagram that the first fan is not provided with motor when on end cap；

Figure 27 is structure diagram in the second better embodiment under high-power, small size；

Figure 28 is the structure diagram of motor when second bearing is needle bearing.

The 3rd housing of 100 power set 1121

102 main casings 114 are by compressing switch

The 3rd node of 1022 resettlement section 116

104 motor, 118 fourth node

106 output shaft, 120 second mounting portion

108 recognition unit, 122 second abutment face

1080 process circuit, 124 lug

1082 first Hall element, 124 ' convex

1084 second Hall element, 126 guide rail

1086 the 3rd Hall element, 128 external splines

1088 the 4th Hall elements 130 bear structure

110 control circuit, 132 flexible apparatus

1101 controller, 300 blower tool body

1102 switch element, 301,401,501,601 gripping handle

112 energy provide 302,402,502,602 tool housing of unit

304,404,504,604 workpiece, 710 power provides unit

306,406,506,606 tool interface, 712 energy provides unit

The 306 input shaft a motors of 700a, 700 ' a, 700 "

308,115 starting switch 701a stators

310 magnet 7011a, 7011 " a through holes

312 first node 702a, 702 ' a rotors

314 section point 7022a, 7022 ' a rotor bodies

316 first mounting portion 703a shafts

318 first abutment face 704a pole pieces

320 buckle 705a, 705a ' end caps

320 ' projection 7050a mating parts

322 button 7051a, 7051 ' the first axis holes of a

322 ' knob 7052a, 7052 ' a end cap bodies

324 guide groove, 7053 ' a joint faces

326 internal spline 7054a short slots

400 grass-mowing machine tool body, 7055 ' a slots

500 chain saw tool body the second fans of 706a

600 shrub and hedge trimmer tool body 7061a fan bodies

700 the second axis holes of tool body 7062a

701 tool housing 7071a flabellums

702 first mating part 7081a clutch shaft bearings

704 second mating part 7082a second bearings

706 functional unit, 7082 " a 3rd bearings

708 operating assembly 709a, 709 " a stator supports

Embodiment

Detailed description for the present invention and technology contents, coordinate brief description of the drawings as follows, but appended attached drawing only provides ginseng Examine and illustrate, be not used for being any limitation as the present invention.

It is the structure diagram of the electric tool system of a better embodiment as shown in Figure 1.Electric tool system includes The tool body of 100 and at least two electric tool of power set, wherein power set 100 are removably installed with this at least The tool body of two kinds of electric tools, the tool body at least two electric tool provide power.In present embodiment, The tool body that electric tool system includes has four kinds, respectively blower tool body 300, grass-mowing machine tool body 400, Chain saw tool body 500, shrub and hedge trimmer tool body 600.Identical installation power set are both provided with four kinds of tool bodies 100 interface.Above-mentioned tool body can also be the hand-push electrical tool bodies such as grass trimmer tool body.Power set 100 dismountable installations and four kinds of tool bodies, and provide power for four kinds of tool bodies.When power set 100 are installed During any one in four kinds of tool bodies, that is, a complete electric tool is formed, perform the electronic work of this type Has the work performed.

To realize different tool body energy shared power units 100, the peak power output of power set 100 and institute There is the highest input power needed for the tool body that can install power set 100 to match；The maximum output of power set 100 Rotating speed matches with the highest input speed needed for all tool bodies that can install power set 100.If for example, institute It is 1000w to have the highest input power needed for the tool body that can install power set 100, all to install power set 100 Tool body needed for minimum input power be 100w, then the output power that power set 100 can provide necessarily be greater than 1000w.The rated power of usual chain saw and grass trimmer is higher, is 1500w or so.The rated power of grass-mowing machine is relatively low, is 300w or so.Different according to the type of tool body, its rated output power is different, such as 2500w, 1000w, 500w.It is logical With above-mentioned blower tool body 300, grass-mowing machine tool body 400, chain saw tool body 500, shrub and hedge trimmer tool body 600, The common power tool body of the garden such as grass trimmer main body class, the rated output power of power set 100 is 2500w or so.When dynamic When power apparatus 100 is only that above-mentioned Some tools main body is general, its rated output power can be 300w or 500w or 1000w, Or 1500w or 2000w or 200w.

When it is only the tool body of 100w that the power set 100, which are installed on required input power, power set 100 Power designs are excessive, cause unnecessary waste.If the highest needed for all tool bodies that can install power set 100 Input speed is 20000 revs/min, and the minimum input speed needed for all tool bodies that can install power set 100 is 1000 Rev/min, then the output speed that power set 100 can provide necessarily be greater than 20000 revs/min.When the power set 100 are installed on When required input rotating speed is only 1000 revs/min of tool body, the Design of Rotation of power set 100 is excessive, and it is unnecessary to cause Waste.To reach the shared effect most economical between different tool bodies of power set 100, it is preferred that electronic work The highest input power needed for different types of tool body that tool system includes is similar；As between 500w to 1000w.It is excellent Choosing, the highest input speed needed for different types of tool body that electric tool system includes is similar.

As shown in Figure 1, blower tool body 300 includes tool housing 302, and the work supported by tool housing 302 Make component 304 and gripping handle 301.Grass-mowing machine tool body 400 includes tool housing 402, and by tool housing 402 The workpiece 404 and gripping handle 401 of support.Chain saw tool body 500 includes tool housing 502, and by tool housing The workpiece 504 and gripping handle 501 of 502 supports.Shrub and hedge trimmer tool body 600 includes tool housing 602, and by work Have workpiece 604 and gripping handle 601 that housing 602 supports.Workpiece 304 (404,504,604) receives power dress The power of 100 transmission is put, and is translated into the power output to match with tool body.Gripping handle 301 (401,501, 601) being used for when electric tool works, i.e., power set 100 provide power for tool body, and workpiece 304 (404, 504,604) when there is output, gripped by operator.Gripping handle 301 (401,501,601) is arranged on tool body, is made Obtaining can be that different types of tool body configures different types of gripping handle 301 (401,501,601).Art technology Personnel are it is understood that gripping handle 301 (401,501,601) can also be arranged on power set 100, under this structure, Its gripping handle 301 (401,501,601) all same of all types of electric tools, will not follow changing for tool body type Become and change.In contrast, gripping handle 301 (401,501,601) is arranged on tool body, due to every kind of gripping hand The structure of handle 301 (401,501,601) is adapted with tool body type, can significantly improve the comfort of operator's gripping.

It is illustrated in figure 2 the concrete structure of the first better embodiment of power set 100.Power set 100 include master Housing 102, motor 104, control circuit 110.Control circuit 110 controls the rotary motion of motor 104.Main casing 102 is detachable Ground is installed on tool housing 302 (402,502,602).When main casing 102 be installed on the tool housing 302 (402,502, 602) when, workpiece 304 (404,504,604) can be driven by motor 104, i.e., the power of motor 104 can pass to work Component 304 (404,504,604).Preferably, motor 104 is brushless electric machine.Control circuit 110 controls the commutation of brushless electric machine And its rotary speed.In present embodiment, the output of power set 100 will not change according to the difference of the type of tool body Become.Under this structure, for realize power set 100 between different tool bodies it is general, phase can be set in tool body One constant input, is converted to the input with tool body type matching by the structure answered.

It is illustrated in figure 3 the concrete structure of the second better embodiment of power set 100.Second better embodiment Improvement with respect to the first better embodiment is that power set 100 can recognize that different tool body types, corresponding defeated Go out the rotary motion with tool body type matching.Specifically, power set 100 include main casing 102, motor 104, knows Other unit 108, control circuit 110.Main casing 102 is removably installed in tool housing 302 (402,502,602).Work as main casing When body 102 is installed on tool housing 302 (402,502,602), workpiece 304 (404,504,604) can be by motor 104 drivings, i.e., the power of motor 104 can pass to workpiece 304 (404,504,604).Motor 104 is selectively defeated Go out rotary motion.Recognition unit 108 identifies the type for the tool body installed with power set 100, and generation and tool body The corresponding signal of type is sent to control circuit 110.The signal that control circuit 110 is sent according to recognition unit 108 controls horse Up to 104 outputs and the rotary motion of tool body type matching.When power set 100 are installed on different tool bodies, The signal that control circuit 110 is sent according to recognition unit 108, can control motor 104 to export different rotary motions, so that Different power is transmitted to workpiece 304 so that the tool body for being provided with the power set 100 can export with The power output of tool body type matching.Power set 100 are achieved in share between different tool bodies.

It is illustrated in figure 4 the concrete structure of the 3rd better embodiment of power set 100.Power set 100 include master Housing 102, motor 104, recognition unit 108, control circuit 110 and energy provide unit 112.Main casing 102 is removably It is installed on tool housing 302 (402,502,602).When main casing 102 is installed on the tool housing 302 (402,502,602) When, workpiece 304 (404,504,604) can be driven by motor 104, i.e., the power of motor 104 can pass to workpiece 304(404,504,604).Motor 104 selectively exports rotary motion.It is dynamic for the offer of motor 104 that energy provides unit 112 Power.It can be ac power cable that energy, which provides unit 112, or chargeable energy-storage units, or AC can be provided at the same time Or D/C power.Recognition unit 108 identifies the type for the tool body installed with power set 100, and generates and tool body class The signal that type matches is sent to control circuit 110.The signal that control circuit 110 is sent according to recognition unit 108 controls motor 104 rotary motion.When power set 100 are installed on different tool bodies, control circuit 110 is according to recognition unit 108 The signal of transmission, can control motor 104 to export different rotary motions, so as to transmit different move to workpiece 304 Power so that the tool body for being provided with the power set 100 can export it is defeated with the power of tool body type matching Go out.Power set 100 are achieved in share between different tool bodies.In addition, in present embodiment, energy provides single Member 112 is co-located in main casing 102 together with the other elements such as motor 104.Such a structure causes power set 100 Structure is single, easy to carry out conversion use between different electric tools.

As shown in figure 5, the 4th better embodiment the present invention also provides power set 100.4th better embodiment With respect to the 3rd better embodiment, difference lies in when it is chargeable energy-storage units that energy, which provides unit 112, energy carries There is the 3rd independent housing 1121 for unit 112.It is provided with power set 100 and houses the 3rd housing 1121 and fixed peace Fill the resettlement section 1022 of the 3rd housing 1121.Energy provides unit 112 is removably pacified by the main casing 102 of power set 100 Dress and support, resulting beneficial effect are that energy provides unit 112 and remains traditional structure, can use traditional Charger charges for it, and charging is more convenient.

The present invention also provides the 5th better embodiment of power set 100.5th better embodiment with respect to the 3rd compared with Difference lies in power set 100 do not include recognition unit 108 to good embodiment.

The present invention also provides the 6th better embodiment of power set 100.6th better embodiment with respect to the 4th compared with Difference lies in power set 100 do not include recognition unit 108 to good embodiment.

In six kinds of embodiments of power set 100, the power set 100 of the first and second better embodiments are not Unit 112 is provided comprising energy.Under this structure, energy provides unit 112 and is arranged on tool body.Energy provides unit 112 Unremovably it is arranged on tool body, or is removably disposed on tool body.

In foregoing various embodiments, power set 100 can not include control circuit 110.Under this scene, control electricity Road 110 is included in tool body.Control circuit 110 can a part be arranged in power set 100, another part set In tool body.

In foregoing various embodiments, control circuit 110 can be controlled outside the rotary motion of motor 104, can also be controlled Energy provides the discharge process of unit 112.Carried specifically, control circuit 110 detects energy in 100 discharge process of power set For the discharge condition of unit 112, such as discharge current, current voltage, and according to the discharge condition detected, it is allowed to or forbid Energy provides unit 112 and is provided to the energy of motor 104.

In foregoing various embodiments, when energy provide unit 112 be battery pack when, battery pack voltage be 20V and more than Voltage.

It is a variety of that the recognition unit 108 of power set 100 identifies that the mode of the type of the tool body of electric tool has, bag Include automatic identification and semi-automatic identification two ways.The type of the tool body of automatic identification electric tool can be by with lower section Formula is realized：Marker elements with specific tool body type matching are set on tool body.When power set 100 are pacified When being filled on tool body, recognition unit 108 detects marker elements by the detecting element to set within it, by detecting member The type for the signal identification marker elements that part detects, and then identify the type of the tool body.Semiautomatic fashion identification is electronic The type of instrument may be accomplished by：Recognition unit 108, which includes being arranged on setting on main casing 102, supplies user's operation Selection element, selection element is operationally in different conditions.User is in different states by operating selection element and sets Determine the type of tool body, recognition unit 108 identifies operating result of the user to the state of selection element, so as to identify user The type of the tool body of setting.Below by taking the 3rd better embodiment of power set 100 as an example, with reference to Fig. 6 and Fig. 7 couples Two kinds of identification methods are introduced.It will be appreciated by persons skilled in the art that identification method introduced below is equally applicable In the other embodiment of power set 100.

It is illustrated in figure 6 the structure diagram of a better embodiment of automatic identification tool body type.This embodiment party In formula, the type for the tool body that recognition unit 108 is installed by non-contacting mode automatic identification and power set 100.Tool Body, recognition unit 108 includes the Hall elements of process circuit 1080 and four on diverse location, respectively positioned at the First Hall element 1082 of one position, the second Hall element 1084 positioned at the second place, positioned at the third place the 3rd suddenly That element 1086, the 4th Hall element 1088 positioned at the 4th position.Four kinds of tool bodies tool housing 302 (402, 502,602) magnet 310 is set respectively on, its position is corresponding with one in aforementioned four Hall element respectively, to protect When card power set 100 are installed to tool body, Hall element can sense magnet 310.When main casing 102 is installed on instrument During housing 302 (402,502,602), due to Hall element installation site and magnet installation site correspondence, magnet 310 close to the first Hall element 1082, away from the second Hall element 1084, the 3rd Hall element 1086 and the 4th Hall element 1088.The first Hall element 1082 produces hall signal, the second Hall element 1084, the 3rd Hall element 1086 and the at this time Four Hall elements 1088 do not produce hall signal.Process circuit 1080 receives hall signal, and identifies the hall signal From the first Hall element 1082, the type of the tool body of installation power set 100 then may recognize that.

In other embodiments, marker elements can also be mechanical contact, and recognition unit 108 is set including two or more The mechanical switch of diverse location is placed in, the position of mechanical switch is corresponding with the position of mechanical contact.When power set 100 are pacified During loaded on tool body, the mechanical switch on mechanical contact triggering relevant position on tool body.Mechanical switch is triggered After close.Recognition unit 108 according to state by disconnect switch to closure mechanical switch position, identify installation power set The type of 100 tool body.It is two-dimensional encoded in addition, marker elements can also be optoelectronic switch, identification resistance etc. it is any its His form.

Fig. 7 show a kind of preferable embodiment party that power set 100 identify power tool type by semiautomatic fashion Formula.Recognition unit 108 includes process circuit 1080 and is arranged on main casing 102 and can be by selection member that user is manually operated Part.In present embodiment, selection element is by compressing switch 114.In preset time, operator's pressing once by compressing switch 114, Represent user's selection is the electric tool of the first type；Twice by compressing switch 114, represent user's selection is for pressing The electric tool of two types.The rest may be inferred, in preset time, 114 is pressed different numbers by compressing switch, represents user It has selected different types of electric tool.Process circuit 1080 identified in preset time by 114 numbers being pressed that compress switch, The type of the electric tool of user's selection can be recognized.So as to fulfill the instrument of semi-automatically identification installation power set 100 The type of main body.

In other embodiments, selection element can be multiple by compressing switch 114, Yi Zhongte with specific markers Calibration note by compressing switch 114, represent a type of tool body.Selection element can also be with multiple gear toggles, When toggle is operatively in a certain particular gears, represents user and have selected a certain certain types of tool body.

The power subject independent as one of power set 100, need to prevent the safety problem brought during its work Shield.In the present invention, set and be electrically connected to ensure power set by the circuit between power set 100 and tool body 100 do not work when being independently arranged, and only can just start work when power set 100 are installed on tool body, thus keep away Exempt from the safety problem that the power subject independent as one of power set 100 is brought.Below with power set 100 for the 3rd compared with Exemplified by good embodiment, the circuit block diagram of several better embodiments of electric tool is introduced.Those skilled in the art It is understood that the electrical connection between power set 100 and tool body that circuits below block diagram is embodied is same Sample is suitable for the other embodiment of power set 100.

It is illustrated in figure 8 the circuit block diagram of the first better embodiment of electric tool.In present embodiment, power dress Putting 100 includes motor 104, and energy provides unit 112, recognition unit 108, control circuit 110 and two electrical nodes, the Three nodes 116 and fourth node 118.Wherein the 3rd node 116 provides unit 112 with energy and is electrically connected, fourth node 118 It is electrically connected with motor 104.Tool body includes starting switch 308 and be electrically connected with the both sides of starting switch 308 two A electrical node, first node 312 and section point 314.Starting switch 308 has closed and disconnected two states, through behaviour Author's triggering can be converted to closure state by off-state.The function for each module that power set 100 and tool body include with Aforementioned embodiments are identical.As shown in figure 8, be off-state between the 3rd node 116 and fourth node 118, therefore motor Closed circuit is not yet formed between 104 and energy offer unit 112.When main casing 102 is installed on tool housing 302, the 3rd Node 116 and fourth node 118 are electrically connected by first node 312 and section point 314.Starting switch is closed at this time 308, closed circuit is formed between motor 104 and energy offer unit 112, energy provides unit 112 and provides energy for motor 104 Amount, control circuit 110 control motor 104 to start to rotate.When tool housing 302 and main casing 102 are separated from each other, motor 104 Closed circuit is not yet formed between providing unit 112 with energy, closes starting switch 308, motor 104 provides unit with energy Closed circuit can not be still formed between 112, it can not be that motor 104 provides energy that energy, which provides unit 112, and motor 104 can not be transported Turn.

It is illustrated in figure 9 the circuit block diagram of the second better embodiment of electric tool.In present embodiment, power dress Putting 100 includes motor 104, and energy provides unit 112, recognition unit 108, control circuit 110, starting switch 115 and two Electrical node, the 3rd node 116 and fourth node 118.Wherein the 3rd node 116 provides unit 112 with energy and is electrically connected, Section point 314 is electrically connected with motor 104.Starting switch 115 is arranged on energy and provides between unit 112 and motor 104, With closed and disconnected two states.Starting switch 115 can be converted to closure state through operator's triggering by off-state.Work Tool main body includes two interconnected electrical nodes, first node 312 and section point 314.Power set 100 and instrument The function for each module that main body includes is identical with aforementioned embodiments.As shown in figure 9, the 3rd node 116 and fourth node 118 Between be off-state, therefore motor 104 and energy unit 112 is provided between not yet form closed circuit.When main casing 102 When being installed on tool housing 302, the 3rd node 116 and fourth node 118 are electrical by first node 312 and section point 314 Connection.Starting switch 308 is closed at this time, and motor 104 and energy form closed circuit between providing unit 112, and energy provides Unit 112 provides energy for motor 104, and control circuit 110 controls motor 104 to start to rotate.When tool housing 302 and main casing When body 102 is separated from each other, closed circuit is not yet formed between motor 104 and energy offer unit 112, closes starting switch 308, closed circuit can not be still formed between motor 104 and energy offer unit 112, it can not be motor that energy, which provides unit 112, 104 provide energy, and motor 104 can not operate.

3rd node 116 disconnects the structure set with fourth node 118 and ensures that power set 100 are established with electric tool Before electric connection, that is, before power set 100 are installed on electric tool, power set 100 cannot start work.By This improves the security of power set 100.

Established between power set 100 and tool body the mode of electric connection have it is a variety of.Can be wirelessly Or wired mode realizes the electric connection of 312 and the 3rd node 116 of first node, section point 314 and fourth node 118 Electric connection so as to fulfill between power set 100 and tool body establish be electrically connected.Wherein, wired mode can be with To set the first connection terminal being electrically connected with first node 312 on tool body, being electrically connected with section point 314 Second connection end.The 3rd connection terminal being electrically connected with the 3rd node 116 is set on power set 100, with fourth node 118 the 4th connection terminals being electrically connected.First connection terminal, second connection end, the 3rd connection terminal, the 4th connecting pin Son can be mutually independent terminal, and the position of the first connection terminal is corresponding with the position of the 3rd connection terminal, and second connects The position of connecting terminal is corresponding with the position of the 4th connection terminal.When power set 100 are installed to tool body, first connects Connecting terminal is connected with the 3rd connection terminal, and second connection end is connected with the 4th connection terminal so that power set 100 and work Foundation is electrically connected between having main body.At this time, starting switch 308 is closed, motor 104 and energy provide time between unit 112 Road is switched on.First connection terminal and second connection end may be set to be one, correspondingly, the 3rd connection terminal and Four connection terminals are also configured as the integrative-structure to match.It is same to can be achieved, when power set 100 are installed to tool body, First connection terminal is connected with the 3rd connection terminal, and second connection end is connected with the 4th connection terminal, realizes power set Establish and be electrically connected between 100 and tool body.

The present invention also provides the 3rd better embodiment to realize when tool housing 302 is separated with main casing 102, closure Starting switch 115, motor 104 and energy can not form closed circuit between providing unit 112, when main casing 102 is installed on work When having housing 302, starting switch 115 is closed, motor 104 and energy form closed circuit between providing unit 112.3rd compared with Difference lies in set detection to good embodiment with the second better embodiment between the 3rd node 116 and fourth node 118 Element and the switch element of examined element control.When detecting element detects that main casing 102 is installed on tool housing 302, Send corresponding control signal controlling switch element closure.At this time, 118 electrical communication of the 3rd node 116 and fourth node, is closed Starting switch 115 is closed, motor 104 and energy form closed circuit between providing unit 112, and motor 104 starts to rotate.Conversely, Detecting element detects that main casing 102 is fitted without when tool housing 302, sends corresponding control signal controlling switch member Part disconnects.At this time, the 3rd node 116 and fourth node 118 can not electrical communication, closure starting switch 115, motor 104 and energy Amount can not form closed circuit between providing unit 112, and motor 104 can not rotate.

It is the circuit block diagram of the 4th better embodiment of electric tool as shown in figure 13.In present embodiment, power dress Putting 100 includes motor 104, and energy provides unit 112, control circuit 110 and two electrical nodes, the 3rd node 116 and the Four nodes 118.3rd node 116 and fourth node 118 are electrically connected with control circuit 110.Control circuit 110 is further Including controller 1101 and switch element 1102.Tool body includes starting switch 308 and the both sides with starting switch 308 Two electrical nodes being electrically connected, first node 312 and section point 314.Starting switch 308 is arranged on tool housing On, operationally in closure or off-state.When main casing 102 is installed on tool housing 302, the 3rd node 116 and Four nodes 118 are electrically connected with first node 312 and section point 314.Pass through the 3rd node 116 and fourth node 118 Respectively with the electric connection of first node 312 and section point 314, controller 1101 can detect starting switch 308 be in close Conjunction or off-state.When controller 1101 detects that starting switch 308 is off, at controlling switch element 1102 In off-state, the energy offer that energy provides unit 112 to motor 104 is prohibited.When controller 1101 detects startup When switch 308 is in closure state, controlling switch element 1102 is in closure state, and energy provides unit 112 to motor 104 Energy provide be allowed to.

In the respective embodiments described above, power set 100 selectively include or not comprising recognition units 108 and control electricity One or two in road 110.When power set 100 include control circuit 110, control circuit 110 can only have electric discharge control Function processed, or there is control of discharge at the same time and control the function of the rotary motion of motor.

According to the above embodiment, the circuit block diagram of electric tool includes at least control circuit and energy provides electricity Road.Energy delivery circuit provides energy to unit 112 and motor 104 is electrically connected, and forms energy and provides unit 112 to motor 104 energy transmission loop.When energy delivery circuit forms closed circuit, energy provides the energy transmission of unit 112 to horse Up to 104, motor 104 rotates.When energy delivery circuit forms cutoff circuit, the energy that energy provides unit 112 can not transmit To motor 104, the stalling of motor 104 rotation or remains stationary.Energy delivery circuit can be alternatively arranged in power set 100 Or in tool body, it can be arranged on a part in power set 100, another part is arranged in tool body.Control Circuit processed can be alternatively arranged in power set 100 or in tool body, can be arranged on power set with a part In 100, another part is arranged in tool body.

Shown in the second better embodiment shown in the first better embodiment as shown in Figure 8, Fig. 9 and Figure 13 The 4th better embodiment in, tool body and power set include a part of circuit respectively.Electricity between two parts circuit Property connection it is real with the electric connection of the 3rd node 116 and fourth node 118 respectively by first node 312 and section point 314 It is existing.Wherein, the circuit in tool body can simplify referred to as the first circuit.Circuit in power set 100 includes at least two Part, a part of circuit are electrically connected with the 3rd node 116 and fourth node 118, this partial circuit, which simplifies, is referred to as the second electricity Road.Another part circuit is then connected with second circuit.Certainly, power set 100 can include more other circuits, or only Include Part II circuit.Tool body can include other more circuits.

In the first better embodiment as shown in Figure 8 and in the second better embodiment as shown in Figure 9, first Circuit and second circuit collectively form energy and provide unit 112 to the energy delivery circuit of motor 104.Also, in such as Fig. 8 institutes In the better embodiment shown, starting switch 308 is located in the first circuit.Starting switch 308 is operationally triggered, and then Whether control energy delivery circuit forms closed circuit.Complete to be electrically connected with tool body specifically, working as power set 100, And starting switch 308 is triggered when closing, the energy delivery circuit formation that energy provides unit 112 to motor 104 closes back Road, energy provide the activated switch 308 of energy that unit 112 is provided to motor 104 and return to energy offer unit.When power fills 100 are put to complete to be electrically connected with tool body, but starting switch 308 is triggered when disconnecting, and energy provides unit 112 to motor 104 energy delivery circuit can not form closed circuit.

In the 4th better embodiment as shown in fig. 13 that, the energy that energy provides unit 112 to motor 104 provides Circuit is arranged in power set.Second circuit controls whether energy delivery circuit forms closure according to the signal of the first circuit Circuit.In the present embodiment, the first circuit includes the starting switch 308 being arranged on tool housing.Starting switch 308 has There are closed and disconnected two states.One end connection first node 312 of starting switch, other end connection section point 314.The One circuit includes first node 312, section point 314, starting switch 308, connects first node 312 and starting switch 308 Circuit and the circuit that connects section point 314 and starting switch 308.When main casing 102 is installed on tool housing 302 When, the 3rd node 116 and fourth node 118 are electrically connected with first node 312 and section point 314.Opened by starting Close 308 closure or the state of disconnection can detect operator and the control instruction of electric tool is started or stoped.Pass through the 3rd Node 116 and the electric connection with first node 312 and section point 314 respectively of fourth node 118, starting switch 308 by its Status information passes to controller 1101, so as to obtain control instruction of the operator to electric tool.When controller 1101 is examined When measuring starting switch 308 and being off, controlling switch element 1102 is off, energy provide unit 112 to The energy delivery circuit of motor 104 disconnects.When controller 1101 detects that starting switch 308 is in closure state, control is opened Close element 1102 and be in closure state, the energy delivery circuit that energy provides unit 112 to motor 104 closes.In the present embodiment Enlightenment under, the first circuit design can be as the case may be any other mode by those skilled in the art.As that will open Dynamic switch 308 replaces with rotary switch, and rotary switch has first state and the second state, when rotary switch is in the first shape During state, 1101 controlling switch element 1102 of controller is off, and the energy that energy provides unit 112 to motor 104 carries Disconnected for circuit；When rotary switch is in the second state, 1101 controlling switch element 1102 of controller is in closure state, The energy delivery circuit that energy provides unit 112 to motor 104 closes.Starting switch can also be arranged to trigger member, triggered Part has triggering state and release conditions, when trigger member is in release conditions, 1101 controlling switch element 1102 of controller It is off, the energy delivery circuit that energy provides unit 112 to motor 104 disconnects；When trigger member is in triggering state When, 1101 controlling switch element 1102 of controller is in closure state, and the energy that energy provides unit 112 to motor 104 provides Closing of circuit.

Above describe the electric connection between power set 100 and tool body.Below in conjunction with Figure 10 to Figure 12, explain State the mechanical connection between power set 100 and tool body.

When the mechanical connection between power set 100 and tool body is described, with blower tool body The connection between power set 100 and tool body is described in detail exemplified by 300, power set 100 and grass-mowing machine instrument Connection structure between main body 400, chain saw tool body 500, shrub and hedge trimmer tool body 600 and any other tool body Refer to the connection structure between power set 100 and blower tool body 300.Power set 100 and tool body it Between mechanical connection include the mechanical connection of tool housing 302 and main casing 102, and the motor 104 of power set 100 with Connection structure between the workpiece 304 of tool body.

Tool housing 302 is provided with the first mounting portion 316, and main casing 102 is provided with the second mounting portion 120.First installation Portion 316 selectively cooperates with the second mounting portion 120.It is main when the first mounting portion 316 and the second mounting portion 120 coordinate Housing 102 is supported by tool housing 302, tool housing 302 and the relatively immovable fixation of main casing 102.As shown in Figure 10 A kind of preferable embodiment to cooperate is realized for the first mounting portion 316 and the second mounting portion 120.First mounting portion 316 Including being arranged at the first abutment face 318 of the inner side of tool housing 302, the buckle 320 being arranged on the outside of tool housing 302, touching The guide groove 324 that hair fastener buckles 320 button 322 and play the guiding role.Pressing button 322 can make buckle 320 be in release State or locking state.The second abutment face 122, the lug 124 that second mounting portion 120 includes being arranged at the outside of main casing 102 with And guide rail 126.The position of lug 124 and number match with the position of buckle 320 and number.The position of guide rail 126 and number Match with the position of guide groove 324 and number.When tool housing 302 is installed with main casing 102, the first abutment face 318 Abut that guide rail 126 is contained in guide groove 324 with the second abutment face 122, buckle 320 is in locking state, so as to lock Tight lug 124 so that tool housing 302 and the relatively immovable fixation of main casing 102.

Button 322 is pressed, buckle 320 is in release conditions.Then, by the guide rail 126 and instrument of power set 100 The guide groove 324 of main body aligns, and pushing power set 100 along the longitudinally of guide groove 324 makes it close to tool body, Reach position as shown in figure 11.Power set 100 are further pushed, until the first abutment face 318 and the second abutment face 122 Abut.Then, release button 322, make buckle 320 be in locking state so that tool housing 302 is pacified with main casing 102 Install complete, reach state as shown in figure 12.In the state of shown in Figure 12, main casing 102 is partially housed in tool housing 302 In.Preferably, main casing 102 at least 1/3 is partially housed in the first mounting portion 316 of tool housing 302.This structure makes The installation obtained between power set 100 and tool body is more firm, and the center of gravity layout of complete machine is more reasonable.

In the embodiment as shown in Figure 14 to 15, difference lies in dash forward with the embodiment as shown in Figure 10 to 12 Ear 124 is replaced by convex 124 ', and button 322 is replaced by knob 322 ', and buckle 320 is replaced by projection 320 '.Convex 124 ' is along master The periphery of housing 102 sets a circle.The rotation of knob 322 ' drive projection 320 ' and convex 124 ' against or be not against.When prominent Block 320 ' and convex 124 ' against when, power set 100 are secured to tool body.When projection 320 ' is not supported with convex 124 ' By when, power set 100 by can opposite tool main body move.

From the embodiment shown in Figure 10 to Figure 15, button 322 or knob 322 ' etc. are provided with tool housing and is touched Send out component, and the buckle locking member such as 320 or projection 320 '；It is provided with main casing 102 and is locked with what locking member coordinated Tight component lug 124 or convex 124 '.When power set 100 are connected with tool body, trigger unit makes locking member will be by Locking member is locked, so as to locking power set 100 to tool body.When tool body needs replacing, trigger unit Obtain locking member and discharge the component that is locked, so that power set can be relatively moved with tool body.

As shown in Figure 10 to Figure 15, the mechanical connection between power set 100 and tool body further includes power set Connection between 100 motor 104 and the workpiece 304 of tool body.Power set 100 include what is be connected with motor 104 Output shaft 106.Tool body includes the input shaft 306 being connected with workpiece 304.Between motor 104 and output shaft 106 with And it may be selected to set power transmission mechanism between workpiece 304 and input shaft 306.Typically, power transmission mechanism is tooth Wheel construction.When being not provided with power transmission mechanism between motor 104 and output shaft 106, motor 104 and output shaft 106 are straight Connect connected.When being not provided with power transmission mechanism between workpiece 304 and input shaft 306, workpiece 304 and input Axis 306 is connected directly.The company of motor 104 and workpiece 304 is realized by the connection between input shaft 306 and output shaft 106 Connect.Connection between output shaft 106 and input shaft 306 is detachable.When main casing 102 is installed on tool housing 302, output Axis 106 is in connection status with input shaft 306, and output shaft 106 is not removable around the circumferential direction of output shaft 106 with respect to input shaft 306 It is dynamic.The better embodiment that the input shaft 306 of the output shaft 106 of power set 100 and tool body mechanically connects is, defeated Enter and container is provided with axis 306, projection is provided with output shaft 106.When main casing 102 is installed on tool housing 302, Projection is contained in container, and container limitation projection is mobile around the circumferential direction of output shaft 106.In a better embodiment, Container is internal spline 326, and projection is external splines 128.In other embodiments, container and projection can also be to think not The other structures such as matched tetragonal body, flange.

Due between motor 104 and output shaft 106, and between workpiece 304 and input shaft 306, selectively Transmission mechanism is set, and therefore, power set 100 can be that the output shaft of workpiece 304 is parallel with the output shaft of motor 104 Or the tool body overlapped provides power, or the output shaft of workpiece 304 and the output shaft of motor 104 are at an angle of The tool body of setting provides power.Preferably, the workpiece of at least two tool bodies that electric tool system includes Output shaft is parallel with the output shaft of motor 104 or overlaps.Thus the beneficial effect brought is that the structure of tool body is simple, Without additionally setting drive mechanism to carry out angular transition in the output shaft of motor 104 and the output shaft of workpiece 304.

As Figure 16 provides the structure chart of the electric tool system of an other better embodiment.With it is electronic shown in Fig. 1 Tool system is identical, and power set 100 can provide power for different types of tool body.The improvement of the system is, energy Amount, which provides unit 112, to be included bearing structure 130, and energy can be provided to unit 112 by bearing structure 130 bears in operator Back.Energy provides unit 112 and further includes flexible apparatus 132.By flexible apparatus 132 realize energy provide unit 112 with The miscellaneous part of electric tool, which is realized, to be electrically connected and/or mechanically connects.

In present embodiment, power set 100 can only include motor 104.Power set 100 are removably installed in work The connection of tool main body is removably installed in energy offer unit 112 and is supported by tool body or energy offer unit 112. When power set 100, which are removably installed in energy, provides unit 112, energy provides unit 112 and power set 100 are straight Electric connection is connect, energy offer unit 112 passes through any one in flexible apparatus 132 and tool interface 306,406,506,606 A connection, to realize that power set 100 and energy provide machinery and/or the electric connection of unit 112 and tool body, with to Tool body passing power.

When power set 100 are removably installed in any one tool body, energy provides unit 112 by soft Property device 132 and tool interface 306, any one connection in 406,506,606, to realize that energy provides unit 112 and work Have machinery and/or the electric connection of main body.Power set 100 are directly connected to tool body at the same time.Energy provides unit 112 It can be realized by the circuit in tool body with power set 100 and be indirectly electrically connected.Energy provides unit 112 and power Device 100 can also realize direct electric connection by flexible apparatus 132.

Power set 100 can only include motor 104 and wiring board in present embodiment.Power set 100 are removably pacified Energy is connected or is removably installed in loaded on tool body unit 112 is provided and provides unit 112 by tool body or energy Support.When power set 100, which are removably installed in energy, provides unit 112, energy provides unit 112 and power set 100 are directly electrically connected, and energy provides unit 112 and passes through in flexible apparatus 132 and tool interface 306,406,506,606 Any one connection, to realize that power set 100 and energy provide unit 112 and connect with the mechanical of tool body and/or electrically Connect, with to tool body passing power.

Power set 100 include motor 104 in present embodiment and energy provides unit 112.Structure 130 is born at this time It may be provided on power set 100.Motor 104 is removably installed in power set 100 and is supported by power set 100.Energy Amount provides unit 112 and is directly electrically connected with motor 104, power set 100 by flexible apparatus 132 and tool interface 306, Any one connection in 406,506,606, to realize the machinery of power set 100 and tool body and/or electric connection, With to tool body passing power.

Power set 100 include motor 104, wiring board and energy offer unit 112 in present embodiment.Bear at this time Structure 130 may be provided on power set 100.Motor 104 is removably installed in power set 100 and by power set 100 Support.Energy provides unit 112 and is directly electrically connected with motor 104, and power set 100 are connect by flexible apparatus 132 with instrument Any one connection in mouthfuls 306,406,506,606, to realize the mechanical and/or electrical of power set 100 and tool body Connection, with to tool body passing power.

To realize that the kinetic force of power set 100 smoothly passes to tool body, it is preferred that output shaft 106 and input Flexible buffering piece is set between axis 306, and the impact between buffer output shaft 106 and input shaft 306, operates steadily.

In the present invention, the situation that starting switch 308 is arranged on tool housing is set directly at including starting switch 308 Situation on tool housing, the situation being also arranged on indirectly by switching part including starting switch 308 on tool housing, The situation being arranged on including starting switch 308 by switching part on electric tool.

The energy of the present invention, which provides unit 112, to provide DC power supply or AC power to motor 104.When energy carries When providing DC power supply for unit 112, energy offer unit 112 can be battery pack or be the energy such as super capacitor Storage unit, can also be the integrated unit comprising AC power cord and AC-DC translation circuits.Carried when energy provides unit 112 When what is supplied is AC power, it can be AC power cord that energy, which provides unit 112, or inverse comprising DC power supply and DC-AC Become the integrated unit of circuit.

The wiring board of the present invention can include hall detection plates or other detection plates that brushless electric machine carries, at this time, circuit Plate is preferably provided in brushless electric machine.Wiring board can also be including at least one in control circuit 110 or recognition unit 108. Wiring board can also include at least two in detection plate or control circuit 110 that brushless electric machine carries or recognition unit 108.

The power set 100 of the present invention can also include at least one in motor and wiring board, or power set 100 There is provided including motor and energy at least one in unit.

In the present invention, can realize that power set carry out shared basis between different power tool bodies, be because It is the component common to different electric tools for power set.On the basis of sharing, it is preferred that power dress of the invention Put the motor for employing long lifespan, such as brushless electric machine so that the performance of motor can be performed on the basis of sharing ultimate attainment. During sharing, the service life of battery pack, therefore, the present invention proposed that battery pack is relatively dynamic with respect to the short life of brushless electric machine The main casing of power apparatus is detachable.In addition, if the motor of power set is general motor, since general motor is in specified work( In the case that rate is certain, the power bracket that it can be exported is limited, can cause the tool body limited types that power set are general, The tool body for necessarily requiring it to be similar for rated power.To solve the problems, such as this, it is preferred that motor of the invention is one kind Motor made of special material, in the case where rated power is certain, exportable power bracket is larger for it, so that volume Determine the larger tool body of power difference, between can also realize the general of power set, further expand the logical of power set Use scope.Under current techniques environment, motor of the invention is brushless electric machine.With the development of technology, brushless electric machine can be Corresponding new motor is replaced.The replacement is the content that the present invention protects.Herein it should also be noted that, the horse of the present invention It is superior to elect the high motor of energy density as, i.e., in the case of identical power output, the volume smaller of motor.

The present invention also provides the power set of the 5th better embodiment.Shown in power set and Fig. 2 in the present embodiment First preferred embodiment is essentially identical, and improved place is, in the present embodiment, power set can only include motor, without Including control circuit.When motor is brushless electric machine, the detection wiring board of configuration detection rotor-position in motor.The present embodiment Defined in, detection wiring board is not belonging to control circuit.

The present invention also provides the power set of the 6th better embodiment.Shown in power set and Fig. 4 in the present embodiment First preferred embodiment is essentially identical, and improved place is, in the present embodiment, power set can only include motor and energy Amount provides unit, without including control circuit and recognition unit.

Power set provided by the invention removably, alternatively, be connected to the tool body of following electric tool, be Its provide power, shrub and hedge trimmer, grass-mowing machine, hair-dryer, grass trimmer, chain saw, jetting machine, small handcart, loosenning tiller, snowplough, Brush cutter, ploughing machine, leaf shattering machine, Gao Zhiju, seeder, multifunctional hoisting machine.Certainly, power set provided by the invention are also Power can be provided for the tool body of any other electric tool.

It is defined in above-mentioned a variety of electric tools, the electric tool of rated power minimum is minimum power electric tool, volume Fixed prominent electric tool is maximum power electric tool；The electric tool of rated speed minimum is electronic for minimum speed Instrument, the electric tool of rated speed maximum is maximum (top) speed electric tool.Wherein, it is provided with the electric tool of deceleration device Rated speed refer to the output speed of deceleration device under rated power, be not provided with the volume of the electric tool of deceleration device Determine the output speed that rotating speed refers to motor under rated power.

The characterisitic parameter of typical electric tool is shown in table 1.According to following parameter, the electronic work of minimum power Have for shrub and hedge trimmer, maximum power electric tool is grass trimmer and chain saw, and minimum speed electric tool is shrub and hedge trimmer, maximum (top) speed Electric tool is hair-dryer.

The operation characteristics typical parameter list of the typical electric tool of table 1

Tool types	Rated power (W)	Rated speed (rev/min)
			Shrub and hedge trimmer	300	1300
Grass-mowing machine	800	5000~6500
			Hair-dryer	560~600	15000
Grass trimmer	1200	2800-3200
			Chain saw	1200	2500~7000
Jetting machine	450	3000

To realize general, the output of the motor of power set of power set between the tool body of different electric tools Power and output speed will reach certain scope, could provide power for the tool body of a variety of different electric tools.Cause This, most basic requirement is, the power bracket of motor output can cover the output of minimum power electric tool minimum power and The maximum power of maximum power electric tool output, the range of speeds of motor output can cover maximum (top) speed electric tool Maximum (top) speed.

Secondly, when the power supply that electric tool uses is DC power supply, to improve the utilization rate to DC power supply, it is desirable to The work efficiency of motor is high, i.e. the output power of motor and the ratio of input power is big, thus, can be by the chemistry of DC power supply The thermal losses in mechanical energy rather than motor can be more converted to, thus extend energy provide unit it is fully charged after, can power The time of power driven tools continuous work, also referred to as single bag working time.Based on this, the motor of further requirement power set is one In the range of fixed output power range and output speed, there is higher work efficiency.Define the minimum of the output power range It is the second predetermined power to be worth for the first predetermined power, maximum.The minimum value for defining the output speed scope is first default turn Speed, maximum are the second preset rotation speed.Power set can be alternatively the tool body or the second electronic work of the first electric tool The tool body of tool provides power.The rated power for defining the first electric tool is the first rated power, defines the second electronic work The rated power of tool is the second rated power.To realize that power set are electronic in the tool body of the first electric tool and second Realized between the tool body of instrument general, must be requested that the power bracket that the first predetermined power and the second predetermined power are formed The power bracket formed more than the first rated power and the second rated power.

In a kind of embodiment, power set are common to the instrument master of grass-mowing machine and the big product of both amounts of hair-dryer Body.At this time, the first rated power is 560w~600w, and the second rated power is 800w, the first rated power and the second default work( The difference of rate is 200w~240w.Preferably, the output power of motor is between the first rated power and the second rated power When, the work efficiency of motor is more than 75%.It is more excellent since the difference of the first rated power and the second rated power is smaller Choosing, when the output power of motor is between the first rated power and the second rated power, the work efficiency of motor is up to 80% More than.It is more highly preferred to, when the output power of motor is between the first rated power and the second rated power, the work of motor It is efficient up to more than 82%.

In another embodiment, power set are common to four kinds of grass-mowing machine, hair-dryer, grass trimmer, chain saw electric tools Tool body, first rated power 560w~600w at this time, the second rated power is 1200w, the second rated power and first The difference of rated power is 600w~640w.Preferably, the work efficiency of motor is more than 75%.It is more highly preferred to, motor When output power is between the first rated power and the second rated power, the work efficiency of motor is up to more than 80%.It is more excellent Choosing, when the output power of motor is between the first rated power and the second rated power, the work efficiency of motor is up to 82% More than.

In another embodiment, power set are common to grass-mowing machine, hair-dryer, grass trimmer, chain saw, jetting machine 5 The tool body of kind of electric tool, at this time the first rated power 450w, the second rated power be 1200w, the second rated power and The difference of first rated power is 750w.Preferably, the work efficiency of motor is more than 75%.Be more highly preferred to, motor it is defeated When going out power between the first rated power and the second rated power, the work efficiency of motor is up to more than 80%.It is more highly preferred to , when the output power of motor is between the first rated power and the second rated power, the work efficiency of motor be up to 81% with On.

In also a kind of embodiment, power set are common to the tool body of the main product of garden electric tool, bag All products in table 1 are included, at this time, the first rated power and the second rated power are respectively 300w and 1200w, and first is specified The difference of power and the second rated power is 900w.Preferably, the output power of motor is that the first rated power and second are specified When between power, the work efficiency of motor is more than 75%.It is more highly preferred to, in the design process of motor, that is, requires its defeated Go out the power of 300w~1200w, while require it to reach higher work efficiency in the power bracket, cause motor Cost it is excessive.The method of compromise is, in these general electric tools, ensures that the efficiency of the high electric tool of sales volume reaches To higher value, and the efficiency of the motor of the less electric tool of sales volume is in a relatively low numerical value.Based on this, it is For the motor of power apparatus design when output power is 300w-400w, its work efficiency is more than 75%, is in output power During 560w~1200w, its work efficiency is more than 82%.In the method for another kind compromise, the output power of motor is in 300w During left and right, the efficiency of motor is 70% or so, and when output power is 560w~1200w, its work efficiency is more than 82%.

According to different design requirements, the type of the tool body of the general electric tool of power set can be different, phase Answer, the first rated power and the second rated power also differ.In other alternative-embodiments, the second rated power with The difference of first rated power can also be any other values, such as 700w, 800w, 1000w etc..In other optional embodiments In, other numerical value that the first rated power can also be between 200w~400w, such as 250w, 270w, 310w.It is optional at other Embodiment in, other numerical value that the second rated power can also be between 1000w~1600w, such as 1100w, 1400w.

Motor is designed based on above-mentioned design requirement.Normally, the type of motor has a variety of, brush motor, brushless Motor, external rotor electric machine, inner rotor motor.Design and type selecting have been carried out respectively for the motor of the above-mentioned type.It is different types of Motor is corresponding with different motor platforms.Motor platform is generally numbered by outer diameter and folded thick size.Wherein, outside Footpath is the diameter of the excircle of rotor.Folded thickness is size of the stator core along motor axial direction.Such as：D6325 is meant that motor Outside diameter is 63mm, and the folded thickness of motor is 25mm；D6425 is meant that the outside diameter of motor is 64mm, and the folded thickness of motor is 25mm；D6415 is meant that the outside diameter of motor is 64mm, and the folded thickness of motor is 15mm；D5030 is meant that the outer of motor Footpath is 50mm, and the folded thickness of motor is 30mm.Table 2 below shows the parameter for 5 kinds of typical motors that the present invention designs.

Table 2：Efficient power output scope, torque output range possessed by different motors

According to table 2, when its work efficiency of different motors is higher, the watt level of output is different.When first When the difference of rated power and the second rated power is more than 200w, 5 kinds of motors can reach work efficiency higher than 75%.When When the difference of first rated power and the second rated power is more than 800w, the work efficiency for having four kinds of brushless electric machines can reach To more than 75%, the size range of 4 kinds of brushless electric machines is：Outside diameter is 45mm-64mm, and it is 15mm-35mm to fold thickness.When first When the difference of predetermined power and the second predetermined power is more than 1000w, there is the equal energy of work efficiency of 3 kinds of outer rotor brushless motors Reach more than 75%, the size range of 3 kinds of outer rotor brushless motors is：Outside diameter is 45mm-64mm, and it is 15mm- to fold thickness 35mm。

Rated power based on the general target electric tool of power set selects D5030 between 300W~1200W Motor.The rated output power of the motor is 1100w.The rated output power of motor refers to the work(of motor pressure point of maximum efficiency Rate output valve.The motor is between output power is 350w~2500w between the first predetermined power and the second predetermined power When, work efficiency is more than 75%；When output power is between 400w~2300w, work efficiency is more than 78%, just It can guarantee that when power set are matched with target electric tool, work efficiency of the motor on target electric tool can be kept In higher efficiency value.

In addition, according to table 2, when its work efficiency of different motors is higher, the output torque size of motor is different 's.The efficient output torque section of motor is defined between the first predetermined torque and the second predetermined torque.When the first default torsion When the difference of square and the second predetermined torque is more than 0.3NM, 5 kinds of motors can reach efficiency higher than 75%.When the first default torsion When the difference of square and the second predetermined torque is more than 0.5NM, the efficiency for having four kinds of brushless electric machines can reach more than 75%, this 4 Planting the size range of brushless electric machine is：Outside diameter is 45mm-64mm, and it is 15mm-35mm to fold thickness.When the first predetermined torque and second When the difference of predetermined torque is more than 1NM, the efficiency for having 3 kinds of outer rotor brushless motors can reach more than 75%, this 3 kinds outer The size range of rotor brushless motor is：Outside diameter is 45mm-64mm, and it is 15mm-35mm to fold thickness.

Further, since power set are dismountable modules, it is necessary to be moved between different electric tools, and The Some tools coordinated with power set are hand held electric tool, these scenes are required to the lighter in weight of power set.It is dynamic One of nucleus module that power apparatus includes is exactly motor, it is therefore desirable to which motor is light-weight.

To reduce the weight of motor, preferred mode is to improve the power density of motor.Power density refers to motor The ratio of rated power and weight.Since the material of motor is substantially stationary, the method for improving motor power density is preferably Reduce the volume of motor, in other words, the rated power of motor is improved in the case of given volume.In the situation of given volume Under, the rotor diameter D of outer rotor brushless motor is more than the rotor diameter D of inner-rotor brushless motor.Again due to the output work of motor Rate is directly proportional to rotating speed (N), folded thick (L), outside diameter (D), can specifically be expressed by the following formula, P=K*D²* L*N, wherein K are Constant.According to the formula, in the case where rotating speed is certain, outer diameter D is bigger, then power P is bigger.It is therefore preferable that outer turn Sub- brushless electric machine.The power density of outer rotor brushless motor is more than 2w/g；It is more highly preferred to, the power density of motor is more than 2.6w/g。

Further, since the output power of motor and rotating speed (N), folded thick (L), outside diameter (D) are directly proportional, specifically can by with Lower formula expression, P=K*D²* L*N, wherein K are constant.From the formula, increase speed, is in folded thick or outside diameter any One, you can increase the power output of motor.But the folded thick or outside diameter of increase can cause the volume of motor to increase, weight increase.Cause This, in the case where not increasing weight, it is desirable to which motor can export higher power, then can be by the way of rotating speed is increased.Base In this, it is preferred that the no-load speed of motor is more than 10000 revs/min.It is more highly preferred to, the no-load speed of motor is 15000 Rev/min~16000 revs/min.

It should be noted that motor above-mentioned in this specification is also known as motor, i.e., by the way that electric energy or other energy are turned A kind of motor of mechanical energy is turned to, motor is named with motor below.

In order to allow the output power of motor (or motor) to reach more than 1200w or be located at the output power of motor It is more than second predetermined power, and the small volume of motor, namely in the case where reducing volume or not increasing motor volume, Ask motor to export higher power, make the ratio of power and quality of the power of motor and the ratio of volume or motor relative to general Logical motor is higher.All it is that industry long-term needs are not satisfied but all the time for small size, powerful motor Technical barrier.Small size, powerful motor, in the case where output power is identical, not only motor itself it is small, Light weight, when motor is installed on electric tool, the overall volume and quality of electric tool can all reduce, and especially work as electricity When power driven tools are hand-held class instrument, the small, light-weight of electric tool can bring very big facility to operator.Therefore, it is small Volume, powerful motor are also increasingly favored by people.But in existing motor, when volume ratio is less, its Rated power is often relatively low.Such as the motor of D5030 of the prior art, the root diameter D of motor is 50mm, and the long L of stator stack is 30mm, volume 58cm³, rated power during its work only up to reach 800w, power density 14w/cm³, and motor Rotating speed only up to reach 12000 revs/min.So the power of motor does not reach above-mentioned requirements under the volume, but work as volume Determine that power does it is higher when, when can meet the grass-mowing machine power demand of above-mentioned rated power 1200w, due to power of motor P =K*D2*L*N, wherein K are constant, and D is the diameter of the rotor of motor, and L is the folded length of stator, and N is the rotating speed of motor, so In the case where rotating speed N is constant, by increase rotor diameter D and stator folded long L to increase power when, motor Volume can be bigger.In the prior art, for improving power, it is common practice that increase the volume of motor, because for common Motor volume is in 58cm³In the motor of 800w or so, the people of industry has been generally acknowledged that the rotating speed 12000/ divides for left and right and power Reach the limit for the rotating speed that motor can be output under the volume, be difficult or impossible to again improve rotating speed.Because the prior art In the motor that can be made, the ratio of the product D2*L of the long L of root diameter D and stator stack of the rotating speed N and motor of motor cannot Too big, when too big, the structure of motor will be unable to bear too high rotating speed in the prior art.In above-mentioned motor, work as diameter When 45mm≤D≤55mm, folded long 25mm≤L≤35mm of the stator, the quality of motor is also substantially stationary, probably in 400- 500g or so.Motor of the prior art can only bear rotating speed and be produced less than less than 12000 turns when quality is 400-500g Raw centrifugal force.It is the factor that people in the industry does not take into account that so increasing power by improving rotating speed under the volume.

The present embodiment provides a kind of motor, and for electric tool, higher power can be exported under small size, work When rated power be P_VolumeIt can reach 15.5W/cm with the volume ratio of motor³, specifically, the rated power P of the motor_Volume >=900w, volume v≤58cm of the motor³；Preferably, P_Volume>=1300w, volume v≤58cm of the motor³；It is more excellent Selection of land, P_Volume>=1300w, volume v≤58cm of the motor³；It is to be appreciated that since the making material of motor is substantially solid Fixed constant, when the given volume of motor, the mass M of motor is also changeless substantially.Therefore, above-mentioned specified work( Rate P_VolumeSame volume ratio can also be expressed by another way, that is, rated power during work is P_VolumeWith the quality of motor M ratios can reach 2W/g.Wherein, the rated power P of the motor_Volume>=900w, mass M≤450g of the motor；It is preferred that Ground, P volumes >=900w, mass M≤400g of the motor；It is further preferable that P_Volume>=1300w, the mass M of the motor≤ 400g。

The motor of high power and small size is illustrated with specific embodiment below, in the high power, small of the present invention In the first embodiment of volume, there is provided a kind of motor, for electric tool, the motor in the present embodiment can be under small size Export larger power.Relative to general motor, under Same Efficieney, motor has light and handy nimble characteristic, when motor is pacified During loaded on electric tool, the overall volume of electric tool also can be relatively small, and corresponding quality also can be relatively low, makes product more Add hommization.Therefore, motor small, power is high, is becoming increasingly popular.In addition, if motor is needed a variety of different When dismountable general between electric tool, as motor both can be with the shrub and hedge trimmer of rated power 300w, rated power On the hair-dryer of 560-600w, on the grass-mowing machine of rated power 800w, the grass trimmer of rated power 1200w, rated power On the chain saw of 1200w and rated power 450w jetting machines are first-class.The operation characteristics typical ginseng of specific typical case's electric tool Number, reference can be made to the table 1 in this specification.The motor is because small, light-weight, the also characteristic with convenient disassembly.

Due to P=K*D2*L*N, wherein K is constant, and D is the radius of the rotor of motor, and L is the folded length of stator, and N is electricity The rotating speed of machine.Originally it is in embodiment, it is preferred to use external rotor electric to make the radius of rotor in the motor under same volume larger Machine.

To allow motor to reach above-mentioned rated power volume ratio or above-mentioned rated power mass ratio, the present embodiment In by improving the rotating speed N of motor improve the rated power P of motor_Volume.Specifically, the rated speed of the motor of the present embodiment N_Volume>=12000 revs/min, it is preferable that the rated speed N of motor_Volume>=16000 revs/min.It is to be appreciated that when the rotating speed of motor carries Gao Shi, the centrifugal force suffered by motor can also increase, and conventional motor is easy to because a series of problems occurs in the raising of rotating speed, such as Bearing failure, shaft fracture or magnetic shoe come off.This example allows motor in high rotating speed by the improvement of existing electric machine structure Lower rotation, and motor is in rated speed N_Volume>=12000 revs/min or N_Volume>=16000 revs/min, the cumulative activation service life is at least 600 Be not in the problem of above-mentioned bearing failure, shaft fracture and magnetic shoe come off, it is preferable that motor is at specified turn more than hour Fast N_Volume>=12000 revs/min or N_Volume>=16000 revs/min, the cumulative activation service life can reach 1000 it is small when more than.

When motor between above-mentioned multiple types of tools main body in use, requiring motor to be mounted at above-mentioned a variety of electricity Power driven tools, this sentences the first electric tool and the name of the second electric tool, represents a variety of electricity in the table 1 of above-mentioned this specification One kind in power driven tools.The rated power of first electric tool is the first rated power P_f, the second electric tool it is specified Power is the second rated power P_S, P_S≥P_f, the rated power P of the motor_Volume≥P_S, first rated power 300w≤P_f≤ 1200w, second rated power 300w≤P_S≤1200w。

It is mounted at due to motor on different electric tools, its rotating speed having of different electric tools is not With, 1300 revs/min of the rated speed of shrub and hedge trimmer, the rotating speed of grass-mowing machine is 5000-6000 revs/min, and the rotating speed of hair-dryer is 16000 revs/min, specifically, the rated speed of other electric tools, referring to the above-mentioned table 1 in this specification.In order to it is general not With motor, the rated speed of the motor in the present embodiment need with it is specified in the first electric tool and the second electric tool The rotational speed matches of the highest electric tool of rotating speed, in other words the rated speed of motor need to be more than or equal to the first electric tool With highest rated speed in the second electric tool, therefore, the first electric tool and/or the second electronic work in the present embodiment Rotating speed coalignment is additionally provided with tool, so that the rotational speed matches between electric tool and motor.The rotating speed coalignment For at least one of gear reduction unit, worm reducer, planetary reducer, belt and synchronous belt.The rotating speed Can also be electronic control switch with device, the electronic control switch by varying motor input voltage or input current Change the rotating speed of motor, and then make the rotational speed matches of motor speed and electric tool.

Due to brushless electric machine relative to brush motor have high efficiency, low energy consumption, low noise, extra long life and it is simple easily With the advantages that, in the present embodiment specifically by taking DC brushless motor as an example, to the first preferable embodiment party under high-power, small size The concrete structure of outer rotor brushless motor carries out related description in formula.

As shown in Figure 20-Figure 21, Figure 20 be the present embodiment in, the three-dimensional structure diagram of used motor 700a, motor 700a includes stator 701a and the rotatable rotor 702a for being sheathed on stator 701a circumferential exteriors, motor 700a are further included End cap 705a positioned at stator 701a one end, stator 701a are equipped with the stator through hole for penetrating through stator 701a both ends vertically 7011a, motor 700a are further included along stator 701a central axis through stator through hole 7011a and turned with what rotor 702a was fixed Axis 703a.

As Figure 22, rotor 702a include the rotor body 7022a in tubbiness of both ends open, rotor body 7022a's is interior Pole piece 704a is circumferentially with wall, it is preferred that pole piece 704a is permanent magnet.

In order to make the small volume of motor, motor outer rotor diameter D≤55mm in the present embodiment, the folded length of the stator For L, L≤35mm；Preferably, diameter 45mm≤D≤55mm of the rotor, folded long 25mm≤L≤35mm of the stator. It is further preferable that the diameter D of rotor is 50mm, the folded long L of stator is 30mm.

In general, above-mentioned pole piece 704a is fixed on above-mentioned rotor body 7022a by way of stickup.Due to motor For 700a when high speed rotates, the no-load speed of motor 700a reaches 12000 revs/min, even as high as 16000 revs/min, pole piece Centrifugal force suffered by 704a is larger, so situation about coming off easily occurs in pole piece 704a.Pole piece 704a takes off in order to prevent Fall, when the rotating speed of motor 700a is higher, it is necessary to make effectively viscous between each pole piece 704a and rotor body 7022a Veneer product increase, to pass through the bonding force for increasing bonding area to ensure between pole piece 704a and rotor body 7022a. In order to make motor 700a at a high speed rotate under, pole piece 704a is not fallen off, the pole piece it is right under Rated motor rotating speed N volumes The linear velocity V2 answered is bigger, then the pole piece 709a and the bonding area S of rotor inner wall are bigger, and S/V2 is more than or equal to 6.4.Further, the meter per second of the linear velocity V2 of pole piece≤41.87, and effective bonding area s >=272 of the pole piece are flat Square millimeter.Preferably, effective area s >=243 square millimeter of the pole piece, linear velocity V2≤41.87 meter of pole piece/ Second.It is to be appreciated that in order to not fall off pole piece 704a, in the case where 700 volume of motor is identical, inside rotor body Pole piece 704a quantity it is more few better, in this way, pole piece bigger per a piece of pole piece 704a corresponding bonding areas 704a is not easy to fall off.But when pole piece 704a is less, the moment of torsion of work efficiency and motor the 700a output of motor 700a is equal It is affected, makes the moment of torsion of output it is impossible to meet the demand of electric tool, and the power supply powered cannot be applied reasonably, Especially when power supply is battery pack, since electric efficiency is low, battery pack stand-by time is short, it is necessary to repeatedly replace battery pack Or charge to battery pack, can be cumbersome.In the present embodiment, electric tool also has the transfer efficiency of motor higher want Ask, when when motor works, output power is 300w-1200w, the transfer efficiency of motor is more than 75%.It is electric in the present embodiment The pole piece 704a of machine have to be larger than more than 10.But when pole piece 704a quantity is excessive, motor is under equal volume, magnetic pole The bonding area of piece 704a can be smaller, and pole piece 704 easily comes off.In order to make pole piece not allow to come off, in the present embodiment motor In the volume range that 700a allows, when outer rotor diameter D≤60, L≤40, pole piece 704a is no more than 20.The present embodiment In, in order to make motor 700a that not only there is higher transformation efficiency and larger output torque, and the volume and matter of motor 700a Amount is all smaller, convenient to be used between different tool bodies in the range of dismounting and different capacity, it is preferable that motor 700a's The diameter D of rotor 702a is arranged to 50mm, and stator 701a folds long L and sets 30mm, and the quantity of pole piece is arranged to 10, comes Ensure that effective bonding area m >=272 square millimeter of pole piece 704a and the power P when motor works of motor 700a are Work efficiency between 300w-1200w is more than 75%.And when the power P of motor is located at 800w to 1200w, the work of motor Make efficiency as more than 80%.In other embodiments, the folded long L of the diameter D of motor and stator can also be arranged to other Value, to ensure effective bonding area, details are not described herein again.

Rotor 702a further includes above-mentioned end cap 705a, and end cap 705a is fixed on rotor body 7022a one end, end cap 705a Including the mating part 7050a with rotor body 7022a fastening matings and the end cap body equipped with the first axis hole 7051a 7052a, and mating part 7050a is connected with end cap body, when rotor 702a is rotated, end cap 705a turns with rotor 702a It is dynamic.In the present embodiment, mating part 7050a is specifically annular in shape, and mating part 7050a is by way of interference fit and rotor Body 7022a is coupled, and certainly, mating part 7050a can also be matched somebody with somebody with above-mentioned rotor body 7022a by other means Conjunction, such as bonding, thread fitting pass through screw fixation.

In the motor 700a courses of work, the structure on motor 700a itself and some other periphery, such as circuit board are past It is past, when the motor feels hot, when especially motor temperature exceedes certain value, to make the magnetic in motor there are some heating problems Pole piece demagnetizes, and makes motor failure, can not rotate.In order to preferably give motor 700a itself or some other peripheries structure into Row heat dissipation, the rotor 702a of motor further include fan.

Such as Figure 23, in the present embodiment, said fans include being used to cool down the first fan inside motor 700a, above-mentioned First fan includes flabellum 7071a, and flabellum 7071a is between end cap body 7052a and mating part 7050a.And pass through flabellum 7071a is set mating part 7050a is fixedly connected with end cap body 7052a, it is possible to understand that ground, flabellum 7071a can also be by end caps Body 7052a stretches out to obtain.It should be noted that in different motors, the set-up mode of end cap is different, so this implementation Defined in example during power of motor density, the rated power P of motor_VolumeWhen being compared with the volume v of motor, motor volume v only serves as reasons The volume that stator and rotor body 7022a positioned at stator exterior are formed, not including above-mentioned end cap 705a and stator branch Frame 709a.

With continued reference to Figure 23, the end cap body 7052a is equipped with short slot 7054a away from the one side of mating part 7050a, The short slot 7054a is circumferentially disposed in the outside of the first axis hole 7051a, by the setting of short slot, can mitigate in motor 700a The quality of end cap.Preferably, it is equally circumferentially spaced between the short slot 7054a, to make in the end cap 705a circumferential directions Mass Distribution is uniform.End cap 705a is avoided with rotor rotation process, because of the unbalanced generation noise of circumferential quality.In addition, when end Lid 705a because in manufacturing process circumferential quality it is unbalanced produce noise when, by the way that the is arranged between short slot 7054a at equal intervals The outside of one axis hole 7051a, can addition or supplement balance mud or other materials in the light short slot of corresponding mass in the circumferential, End cap is eliminated in rotation process because of the noise of the unbalanced generation of circumferential quality.

It is to be appreciated that as shown in figure 24, in other embodiments, the short slot 7054a can also be arranged at end cap sheet Body 7052a is towards the one side of mating part 7050a, and size circumferentially-spaced between the short slot 7054a and short slot The size of 7054a itself can be changed according to actual needs, and details are not described herein again.

Such as Figure 25, in the present embodiment, said fans further include for cool down miscellaneous part outside motor 700a second Fan 706a, the second fan 706a include fan body 7061a, and fan body 7061a is equipped with and shaft 703a mating reactions The second axis hole 7062a, in the present embodiment, the hot wind of motor internal is blown to miscellaneous part by the first fan in order to prevent, on State and formed between the fan body 7061a of the second fan 706a and above-mentioned end cap body 7052a to isolate the first fan and the The shielding surface of two fan 706a.It is to be appreciated that other types are set between the first fan and the second fan 706a Separator, for preventing the hot wind inside motor 700a from continuing to be blown to elsewhere by the second fan 706a, influence cooling effect Fruit.

In other embodiments of the present invention, it is possible to understand that ground, above-mentioned end cap 705a and the first fan can also Using other structures.As Figure 25, a of end cap 705 ' include (in figure not showing with the mating part of a of rotor body 7022 ' fastening matings Go out) and end cap body 7052a ' equipped with 7051 ' a of the first axis hole, by by holding between 7052 ' a of end cap body and mating part The outwardly extending joint face 7053a ' connections of lid body 7052 '.And end cap 705a ' is equipped with 7055 ' a of fluting to make first Wind caused by fan can be sent to inside a of motor 700 '.Namely first fan flabellum (not shown) and indirect set It is placed on a of end cap 705 '.

Said stator 701a includes the stator armature (not shown) equipped with hot-wire coil, and stator armature is after powered up Magnetic field is formed, and is interacted with the pole piece 704a inside above-mentioned rotor 702a, rotates rotor 702a.

Such as Figure 20 and Figure 21, the motor 700a further includes the stator branch for motor 700a to be installed on to electric tool Frame 709a, in the present embodiment, stator support 709a are fixedly connected with electric tool, it is necessary to illustrate, stator support 709a It can directly be fixedly connected, stator support 709a and the main casing of above-mentioned power set can also be consolidated with instrument electric tool Fixed connection, and be fixedly connected by main casing and electric tool.Stator support 709a is fastenedly connected with stator 701a, this Sample, after motor 700a is installed on electric tool, the tool heads for driving electric tool by shaft 703a work.Referring to Figure 21, specifically, in the present embodiment, stator support 709a is fixed on electric tool in one end away from stator 701a, another Hold the hollow sleeve for extending to form and being sheathed on the outside of shaft 703a into the stator through hole 7011a of motor stator 701a, and stator Stent 709a is fixed by the hollow sleeve inside stator 701a and stator 701a.Since shaft 703a and above-mentioned turn Sub- 702a immovable fittings, rotor 702a are rotated in magneticaction lower band turn axis 703a and then are driven tool heads to work.Need It is noted that in order to reduce the weight of above-mentioned motor 700a, it is preferable that stator support 709a uses aluminum, but at a high speed During rotation, stator support 709a is easily snapped off, therefore, in the present embodiment in order to make stator support 709a be adapted to high speed rotate Lower use, stator support 709a can mainly be made by aircraft aluminum material.Motor 700a is further included to be used on the outside of shaft 703a The bearing for making shaft 703a to be rotated relative to other fixed components of motor 700a.

As shown in figure 21, the bearing includes the clutch shaft bearing between stator support 709a and shaft 703a outer walls 7081a, and the clutch shaft bearing 7081a is located at stator support 709a close to one end of tool body, to make shaft 703a can Rotated relative to stator support 709a.The bearing is further included positioned at stator 701a stators through-hole wall and shaft 703a outer walls Between second bearing 7082a.In the present embodiment, due to the motor 700a only by one end of stator support 709a with Tool body is fixed, namely motor 700a only one end is fixed with tool body or above-mentioned main casing, thus shaft Supports of the 703a to motor 700a supports for single armed beam, the structure supported relative to double-walled beam, and second bearing 7082a needs to hold By the larger load from motor 700a；In addition, volumes of the second bearing 7082a between by stator 701a and shaft 703a Limitation, the usual small volumes of second bearing 7082a；Therefore, bearing is when high speed loaded rotates, relative to low speed rotation When motor 700a and double-walled beam support motor be easier bearing failure problem occur.It is to be appreciated that in the present embodiment Above-mentioned motor can also change into the motor of double-walled beam support, i.e. the shaft 703a both ends of motor 700a with above-mentioned main casing Body or tool body are fixedly connected, but the volume or weight of the further expanded motor 700a of double-walled beam support meeting, this specification In power set in above-mentioned other embodiment volume and weight.Preferably, easily lost to solve second bearing 7082a Effect, while the volume or weight increase of motor 700a or power set is smaller, second bearing 7082a uses duplex bearing.Bearing bag Bearing block and ball are included, bearing block forms the raceway rolled for ball, and in the present embodiment, above-mentioned duplex bearing can be by 2 groups Bearing block with single raceway and single group ball is placed side by side, or has the bearing block and 2 groups of ball compositions of double raceways Bearing.By using dual bearing structure, the load undertaken originally by a bearing can be shared by two bearings, is reduced The risk of bearing failure.In the present embodiment, baffle ring is additionally provided between two bearings arranged side by side, to prevent two it is arranged side by side Interfered between bearing.Certainly, the bearing in the present embodiment can also be multiple bearing, and details are not described herein.

Referring to Figure 28, it is possible to understand that ground, in order to enable the second bearing 7082a in the present invention preferably to undertake load, The second bearing can be needle bearing, and the axial direction of the needle roller is parallel with the axial direction of shaft, needle roller Bearing has a larger loaded area relative to above-mentioned ball bearing, and the load undertaken on unit area is relatively small, because And the risk to fail reduces.

It is to be appreciated that it is of the invention since second bearing is arranged between shaft outer wall and stator through-hole wall, due to turning Volume between axis outer wall and stator through-hole wall is narrow and small, it is impossible to the volume of bearing done greatly, therefore, of the invention other It can be revolved in embodiment by varying the setting position of second bearing 7082a to increase the volume of bearing so as to fit in high speed Used in the case of turning.

As shown in figure 27, Figure 27 is the motor 700 " employed in the second better embodiment under high-power, small size The sectional view of a.The a of motor 700 " includes a of stator 701 " and the rotatable rotor 702 " for being sheathed on the circumferential exterior of stator 701 " A, end cap 705 " a, a of motor 700 " that motor further includes positioned at a of motor 700 " one end further include above-mentioned stator support 709”a。

In the present embodiment, a of 3rd bearing 7082 " is located at a of rotor 702 " inner walls and a outer walls of shaft 703 " form sky In chamber, and a of 3rd bearing 7082 " is between a of stator 701 " and end cap 705 ", namely positioned at a of stator 701 " away from stator branch Between one end of a of frame 709 " and a of end cap 705 ", and a of second bearing 7082 " by the 710 " a of bearing fixed frame of setting by the 3rd The a of bearing 7082 " is fixed on the outside of a of shaft 703 ".Specifically, 709 " a of bearing fixed frame can be by fixed with a of stator 701 " The mode of a of sub-through hole 7011 " interference fits is fixed, a of the 3rd bearing 7082 " bearing inner walls to 3rd bearing The distance of 7082 " a bearing outer walls is more than shaft outer wall to the distance of 7011 " a inner walls of stator through hole.In the present embodiment, it is described The a of end cap 705 " identical with the end cap 705a in above-described embodiment 1 can also can equally determine with the difference of above-mentioned end cap 705a The fixed form of submounts and electric tool can with above-mentioned high power, small size first embodiment in stator support with electricity The fixed form of power driven tools is identical, can also be with above-mentioned high power, the first embodiment stator support and electric tool of small size Fixed form it is different, do not limit herein.The other structures and characteristic of motor can with above-mentioned high power, small size One embodiment is identical.

As shown in table 2, D5030 is outer rotor brushless motor, which make it that its power density is higher than 2W/g, while by In its rotating speed be 15000 revs/min~16000 revs/min so that its volume further reduces, weight be further reduced to 400g a left side The right side, power density are further improved as 2.75w/g.

Hereinafter, illustrate with reference to table 3, the power set equipped with D5030 motors are assembled to the tool body of different electric tools When upper, the working characteristics parameter of each electric tool.Wherein, motor load rotating speed refers to motor under corresponding loading condition Output speed.For example, the implication of the motor load rotating speed of shrub and hedge trimmer is：When the output power of motor is 300w, motor Output speed is 15000 revs/min~15700 revs/min.

Table 3：When power set equipped with D5030 motors are assembled on the tool body of different electric tools, each electronic work The operation characteristics typical parameter of tool.

According to the characteristic curve of motor, under the conditions of different power outputs, the load of the work efficiency, motor of motor Rotating speed is different.Therefore, when power set are installed on the electric tool with different rated power, it is in specified work( When working under rate, the work efficiency of motor is different with the load speed of motor, and concrete numerical value is referring to table 3.

In addition, as shown in table 3, under different loads, the load speed difference of motor is smaller, and different electric tools Rated speed difference is larger, therefore, it is necessary to carry out different degrees of deceleration to the load speed of motor, could cause electronic work Tool can obtain the rated speed needed for it.The mode of deceleration has at least two, and one kind is mechanical reduction, i.e., is filled by slowing down Put deceleration；Another kind is photoelectrons slow, i.e., the output speed of motor is reduced by adjusting duty cycle or the angle of flow.Photoelectrons slow Principle be reduce motor input voltage or input current, so as to fulfill deceleration.At this time, the input power of motor accordingly drops Low, in the case where motor operations efficiency is certain, the output power of motor also reduces.The principle of mechanical reduction is to pass through deceleration Device reduces the output speed of motor, will not reduce the input voltage or input current of motor.Correspondingly, motor input work Rate will not reduce, and in the case where motor operations efficiency is certain, the output power of motor will not reduce.In the present invention, due to Motor will be common to the tool body of different types of electric tool, each electric tool will to the output power of motor Ask span larger.Such as in an embodiment of the present invention, difference exceedes between peak power output and minimum output power 900w.If using photoelectrons slow, the span of the output power of motor can be further increased, increases the design difficulty of motor. To reduce the design difficulty of motor, the present invention is preferably slowed down by deceleration device.According to the rated speed of different electric tools Difference between the rated speed of motor, sets the deceleration device with corresponding speed reducing ratio, the deceleration dress of each electric tool The speed reducing ratio put is as shown in table 3.

In the present invention, power set can include energy and provide unit, can not also include energy and provide unit.Below With reference to table 4 to the power set that unit is provided including energy and the power of electric tool for being provided with the power set, energy, Weight illustrates.In the present embodiment, it is battery pack that energy, which provides unit,.

As shown in table 4, the voltage of battery pack is 60V, capacity 2Ah, that is to say, that battery pack provide energy be 120Wh.At this time, the main screw lift of power set is 2Kg~2.1Kg.Therefore, the energy to weight ratio of power set is 57Wh/kg ~60Wh/kg.Again since selected motor is D5030 motors, its rated power is 1100w, therefore the rated power of power set Ratio with weight is 523W/kg~550W/kg.Be provided with each electric tool of the power set weight and energy to weight ratio, Power-weight ratio is as shown in table 4.Wherein main screw lift refer to when power set are installed on electric tool, electric tool Weight.Complete machine energy to weight ratio refers to the energy of battery pack offer and the ratio of main screw lift.Complete machine power-weight ratio refers to It is the rated power of complete machine and the ratio of main screw lift.

Table 4 is the energy to weight ratio and power-weight ratio of each electric tool when battery pack is 120Wh

In another embodiment, the voltage of battery pack is 60V, capacity 4Ah.That is, the energy that battery pack provides Measure as 240Wh.At this time, the main screw lift of power set is 2.7Kg-2.8Kg.Therefore, the energy to weight ratio of power set is 85.7Wh/kg~88.9Wh/kg.Again since selected motor is D5030 motors, its rated power is 1100w, therefore power fills The rated power and the ratio of weight put are 392.8W/kg~407.4W/kg.Each electric tool of the power set is installed Weight and energy to weight ratio, power-weight ratio are as shown in table 5.

Table 5 is the energy to weight ratio and power-weight ratio of each electric tool when battery pack is 240Wh

In also a kind of embodiment, power set do not include energy and provide unit.At this time, the weight of power set is 0.9Kg-1.1Kg, since selected motor is D5030 motors, its rated power is 1100w, therefore the rated power of power set Ratio with weight is 1000W/kg~1222.2W/kg.When power set are installed on electric tool, the voltage of battery pack, The power-weight ratio of capacity, the energy to weight ratio of the weight of complete machine and complete machine and complete machine refers to the data of table 4 and table 5.

60V in the present invention refers to voltage when battery pack is fully charged, is specially that the lithium electricity that nominal voltage is 54V fills Voltage during full electricity, that is, 15 section nominal voltages be 3.6V/Cell lithium battery be together in series it is fully charged after voltage.This The 60V battery packs of invention include the lithium battery of 15 section series connection, and the nominal voltage per batteries is 3.6V.The 60V batteries of the present invention Bag can also be any other multiple battery unit connection in series-parallel compositions.In view of in actual design process, many factors influence to set Parameter is counted, the scope of the positive negative variation 1%~5% of numerical value described in the present invention is the scope expressed by the numerical value, the present invention The percentages of record include its numerical value in itself and increase or decrease 1%.For example, power is meant that for 800W Any number of the power between 760W-840W, the representative value which includes have 760W (=800-800*5%), 792W (=800-800*1%), 800W, 808W (=800+800*1%), 840W (=800+800*5%).Efficiency is 70% to contain Justice is that efficiency is 69%-71%, and the representative value which includes has 69% (=70%-1%), 70%, 71% (=70%+ 1%).

In the section Example of the present invention, power set do not include energy and provide unit, in such cases, power set Unit is provided with energy and is separated from each other setting, is directly coupled with tool body respectively, so as to be combined into one completely Electric tool.Correspondingly, it is respectively arranged with tool body with the mating part of power set mating and provides unit with energy The mating part of mating.Two mating parts are set independently of each other, and unit is separately provided with energy and power set play mating Effect.

It is the structure chart of the first preferred embodiment of tool body 700 provided by the invention as shown in figure 17.The present embodiment In, tool body 700 includes tool housing 701, functional unit 706 and the first mating being arranged on tool housing 701 702 and second mating part 704 of portion.First mating part 702 removably provides unit 712 with energy and is coupled.Second mating part 704 removably provide unit 710 with power is coupled.Unit 710 is provided respectively with the when energy provides unit 712 and power When one mating part 702 and the second mating part 704 are coupled, energy provides the energy that unit 712 provides and is transmitted through tool body 700 Unit 710 is provided to power, power provides unit 710 and the energy of reception is converted to power output, driving function component 706 Perform default work.In the present embodiment, functional unit 706 is pruning component, and in other embodiments, functional unit 706 is also Can be blowing component, pressure-vaccum component, component of beating the grass, mowing component, wobble component, reciprocating member, snow throwing component, cleaning group Executive module of part and any other electric tool etc..

First mating part 702 includes the first engaging portion and the first electric interfaces, and the first engaging portion provides unit with energy 712 realize mechanical connection, and the first electric interfaces provide the realization of unit 712 with energy and are electrically connected.Second mating part 704 includes Second engaging portion and the second electric interfaces, the second engaging portion provide unit 710 with power and realize mechanical connection, and second electrically connects Mouth provides unit 710 with power and realizes electric connection.

First electric interfaces include with energy provide unit 712 cathode be electrically connected the first positive terminal and with energy Amount provides the first negative terminal that the anode of unit 712 is electrically connected, and the second electric interfaces include electrical with the first positive terminal Second positive terminal of connection and the second negative terminal being electrically connected with the first negative terminal.First electric interfaces and second Electric interfaces can be directly electrically connected, and the circuit that can also pass through in tool body 700 is electrically connected indirectly.

Preferably, the first electric interfaces include the first positive terminal and the first negative terminal, and the second electric interfaces include the Two positive terminals and the second negative terminal.Energy provides the energy of unit 712 successively through the first positive terminal and the second positive terminal Subflow enters power and provides unit 710, and then flowing back to energy through the second negative terminal and the first negative terminal successively provides unit 712。

Preferably, the first electric interfaces further include the first signal transmission terminal group, and the second electric interfaces further include the second letter Number transmission end subgroup.First signal transmission terminal group and secondary signal transmission terminal group include at least a signal terminal respectively. First signal transmission terminal group and secondary signal transmission end subgroup can directly or indirectly transmit signal.First signal transmission Signal can be transmitted by wired mode between terminal group and secondary signal transmission end subgroup, wireless side can also be passed through Formula transmits signal.Preferably, the first signal terminal set includes two signal terminals, and a terminal outwards transmits signal, the other end Son receives extraneous signal.Secondary signal terminal group includes two signal terminals, and a terminal outwards transmits signal, the other end Son receives extraneous signal.

As shown in figure 17, the first mating part 702 and the second mating part 704 independently of each other and are separated from each other setting.Define work Has the X-direction in the extending direction such as figure of housing 701, it is Y-direction to define the direction vertical with X-direction.As seen from the figure, first The distance of 702 and second mating part 704 of mating part in X direction is less than 20 centimetres.Preferably, less than 10 centimetres.It is more highly preferred to , less than 5 centimetres.It is more highly preferred to, distance is 0 centimetre.First mating part 702 and the second mating part 704 along Y-direction away from From less than 20 centimetres.Preferably, less than 10 centimetres.It is more highly preferred to, less than 5 centimetres.It is more highly preferred to, distance is 0 centimetre. The distance of first mating part 702 and the second mating part 704 determines jointly by the distance of X-direction and the distance of Y-direction, above-mentioned row The distance values of the X-direction gone out can be combined arbitrarily with the distance values of Y-direction.

As shown in figure 17, tool body 700 further includes operating assembly 708.Operating assembly 708 can be handle, switch etc. During electric tool performs work, by user's gripping or the component operated.In the present embodiment, 702 He of the first mating part Second mating part 704 is close to operating assembly 708 and sets.

It is the structure chart of the second preferred embodiment of tool body 700 as shown in figure 18.In the present embodiment, tool body 700 structure and the structure of embodiment illustrated in fig. 17 are essentially identical, differ only in, in the present embodiment, the first mating part 702 The position for being located proximate to the setting of operating assembly 708 on tool housing 701, the second mating part 704 is on tool housing 701 Be located proximate to functional unit 706 setting position.In other embodiments, the first mating part 702 and the second mating part 704 It can be close to functional unit 706 to set, or the first mating part 702 is set close to functional unit 706, the second mating part 704 Set close to operating assembly 708.

As shown in figure 19, the present invention also provides a kind of electric tool, including tool body 700, energy to provide unit 712, And power provides unit 710.The structure of tool body 700 is as it was previously stated, details are not described herein.Wherein, power provides unit 710 include motor and control the wiring board A of motor running.Energy, which provides unit 712, to be included multiple battery units and monitors multiple The wiring board B of the discharge condition of battery unit.Connection energy offer unit 712 is set to be provided with power in tool housing 701 single The wiring board C of electric connection between member 710.Motor in the present embodiment can be that the previous section of this specification is recorded Motor.

In one embodiment, wiring board A controls the operating of motor, such as speed governing, speed stabilizing, rotating, reversion automatic stop, just Turn automatic stop, pulse function etc.；Wiring board B monitors the discharge condition of multiple battery units, such as detects voltage, the energy of battery unit Measure the whole bag voltage that unit 712 is provided, temperature, discharge current etc.；Wiring board C control energy provides the electric discharge of unit 712 Journey, such as overcurrent protection, Cross prevention, overheat protector.In another embodiment, wiring board C does not have any control work( Can, only it is electrically connected wiring board A and wiring board B；Wiring board A controls the operating of motor, and controls energy to provide unit 712 Discharge process；Wiring board B monitors the discharge condition of multiple battery units.In another embodiment, wiring board A detection motors Operating condition, such as rotating speed, phase；Wiring board B monitors the discharge condition of multiple battery units；Wiring board C control motors Operating and energy provide the discharge process of unit 712.

The above-mentioned definition to each element is not limited in the various concrete structures mentioned in embodiment or shape, ability The those of ordinary skill in domain can replace while it is simply known.

It may occur to persons skilled in the art that the present invention can also have other implementations, but as long as it is used Technical spirit and the present invention it is same or like seemingly, or it is any based on the variations and alternatives made of the present invention all in the present invention Protection domain within.

Claims

1. a kind of motor, for electric tool, it is characterised in that the motor includes：Stator, rotatably turn relative to stator Son, shaft and the stator support for stator to be fixed on to electric tool, the motor produce magnetic field after powered up, described turn Son rotates under the influence of a magnetic field, and the shaft is fixedly connected with the rotor, and is rotated with the rotor, to drive The workpiece of electric tool performs related work, and the volume of the motor be v, and the power when motor works is P, motor Rated power be P_Volume, the rated power P of the motor_VolumeRatio with the volume v of motor is k, k >=16.5w/cm³。

2. motor according to claim 1, it is characterised in that rated power 960w≤P of the motor_Volume≤ 1440w, institute State the volume 58cm of motor³≤v≤83.1cm³。

3. motor according to claim 2, it is characterised in that the rated power P of the motor_VolumeFor 1200w.

4. motor according to claim 1, it is characterised in that the motor is external rotor electric machine.

5. motor according to claim 4, it is characterised in that the rotor includes the tubular rotor sheet of both ends open Body, the inner wall of the rotor body are equipped with pole piece, and the rotor body is sheathed on the stator exterior, and the rotor sheet The outside diameter of body is D, 45mm≤D≤55mm；The stator includes the stator through hole axially through stator interior, and the stator Folded a length of L, 25mm≤L≤35mm；The shaft is fixedly connected through stator through hole and with the rotor body；The motor Rated power 960w≤P_Volume≤1440w。

6. motor according to claim 5, it is characterised in that the diameter D of the rotor body is 50mm, the stator It is 30mm to fold long L.

7. motor according to claim 5, it is characterised in that rotating speed is N during the motor work, and Rated motor rotating speed is N_Volume, 12800 revs/min≤N_Volume≤ 19200 revs/min.

8. motor according to claim 7, it is characterised in that the motor 12800 revs/min≤N of rotating speed at work_Volume≤ 19200 revs/min, cumulative activation service life of motor is t, 1000 it is small when≤t≤1500 it is small when.

9. according to the motor described in claim 1-8 any one, it is characterised in that the motor is brushless electric machine.

10. motor according to claim 7, it is characterised in that one end of the stator support is fixed with the stator to be connected Connect, the other end is connected with electric tool, and motor is fixed on electric tool by stator support, the motor, which further includes, to be set The bearing being placed on the outside of shaft, the bearing include clutch shaft bearing between stator support and shaft outer wall, and described the One bearing is close to one end that stator support and electric tool are fixed.

11. motor according to claim 10, it is characterised in that the shaft runs through the both ends of the stator support, institute State the one end of stator support away from stator and be fixed on the electric tool, and from the end along stator through hole to stator through hole inside The hollow sleeve being sheathed on the outside of the shaft is extended to form, the stator support passes through hollow in the stator through hole Casing is fixed with the stator, the clutch shaft bearing be located at shaft outer wall and the inner wall of hollow sleeve that is sheathed in shaft it Between.

12. the motor according to claim 10 or 11, it is characterised in that the component of the stator support includes aircraft aluminum Material.

13. motor according to claim 10, it is characterised in that the bearing includes being located at stator through-hole wall and shaft Second bearing between outer wall, the second bearing is making shaft can be relative to stator rotation.

14. motor according to claim 13, it is characterised in that the second bearing is by two or more bearing group arranged side by side Into.

15. motor according to claim 14, it is characterised in that the second bearing is by two ball bearing groups arranged side by side Into baffle ring being equipped between described two ball bearings arranged side by side, to prevent from interfering between two bearings arranged side by side.

16. motor according to claim 13, it is characterised in that the second bearing is needle bearing, and the needle roller Axial direction it is parallel with the axial direction of shaft.

17. motor according to claim 10, it is characterised in that the rotor is further included positioned at the end of rotor body one end Lid, and the end cap is fixed on the one end of rotor body away from stator support, the motor is further included positioned at rotor through-hole wall The 3rd bearing in cavity is formed with shaft outer wall, and the 3rd bearing is located at the one end of the stator away from stator support Between end cap.

18. motor according to claim 17, it is characterised in that the 3rd bearing inner wall to 3rd bearing outer wall away from With a distance from more than or equal to shaft outer wall to stator through-hole wall.

19. motor according to claim 17, it is characterised in that the 3rd bearing by with the stator immovable fitting Bearing fixed frame be fixed.

20. motor according to claim 7, it is characterised in that the stator includes the stator armature equipped with hot-wire coil, The stator armature produces magnetic field and rotates motor by magnetic field and pole piece interaction after powered up, the magnetic pole The quantity of piece is more than or equal to 10.

21. motor according to claim 20, it is characterised in that the power input to a machine is P1, the output of motor Power is P2, and the efficiency of motor is η, η=P2/P1, during output power 300w≤P≤1200w when motor works, η >= 75%.

22. motor according to claim 21, it is characterised in that described during the power of motor 500w≤P≤1200w The efficiency of motor is η >=80%.

23. motor according to claim 21, it is characterised in that the pole piece is corresponding under Rated motor rotating speed N Linear velocity V2 is bigger, then the pole piece and the bonding area S of rotor inner wall are bigger, and S/V2 is more than or equal to 6.4, to increase magnetic Bonding force between pole piece and rotor inner wall.

24. motor according to claim 23, it is characterised in that the quantity of the pole piece is n1, n1≤20.

25. motor according to claim 24, it is characterised in that the quantity n1 of the pole piece is 10, the line of pole piece The meter per second of speed V2≤41.87, and effective bonding area s >=272 square millimeter of the pole piece.

26. motor according to claim 1, it is characterised in that it is electronic that the motor is mounted at least two Instrument, is respectively the first electric tool and the second electric tool, and the rated power of first electric tool is specified for first Power P f, the rated power of the second electric tool is the second rated power PS, PS >=Pf, the rated power P of the motor_Volume≥ PS。

27. motor according to claim 26, it is characterised in that the first rated power Pf for 300w to 1200 it Between, the second rated power PS for 300w between 1200w, as the Pf≤P≤PS, the work efficiency of the motor is More than 75%.

28. motor according to claim 27, it is characterised in that the rotor includes pole piece, and the stator includes fixed Sub- armature, after powered up, the stator armature produces magnetic field and the pole piece interaction rotates rotor to the motor, The quantity of the pole piece is more than 10.

29. motor according to claim 28, it is characterised in that the motor is external rotor electric machine, and the rotor includes In the rotor body of the tubular of both ends open, the rotor body is sheathed on the outside of the stator, and the pole piece, which is located at, to be turned On the inner wall of sub- body, and the quantity of the pole piece is no more than 20.

30. motor according to claim 26, it is characterised in that first electric tool and/or the second electric tool Rotating speed coalignment is equipped with, to make the rotational speed matches of the rotating speed of motor and electric tool.

31. motor according to claim 30, it is characterised in that the rotating speed coalignment is gear reduction unit, worm screw At least one of retarder, planetary reducer, belt and synchronous belt.

32. motor according to claim 30, it is characterised in that the rotating speed coalignment is electronic control switch, institute State electronic control switch changes the rotating speed of motor by varying the input voltage or input current of motor, and then makes motor speed With the rotational speed matches of electric tool.

33. a kind of motor, for electric tool, it is characterised in that the motor includes：It is stator, rotatable relative to stator Rotor, the pole piece for being fixed on motor internal, shaft and the stator support for stator to be fixed on to electric tool, the electricity Machine produces magnetic field and rotates rotor with pole piece interaction after powered up, and the shaft is fixed with the rotor to be connected Connect, and rotated with the rotor, to drive the workpiece of electric tool to work, the quality of the motor is M, institute Output power when stating motor work is P, and the rated power of motor is P_Volume, the rated power P of the motor_VolumeWith the motor The ratio of mass M be ρ, ρ >=2.4w/g.

34. motor according to claim 33, it is characterised in that allow output power 960w≤P during the motor work_Volume ≤ 1440w, 350≤M of quality≤450g of the motor.

35. a kind of electric tool, it is characterised in that the electric tool includes tool housing, the work supported by tool housing Motor described in component, gripping handle and the claims 1-8,10-34 any one, the motor are used to drive electronic The workpiece of instrument performs related work.