CN206922597U - Electric working machine - Google Patents

Abstract

The utility model provides a kind of electric working machine, and it suppresses to make the element of overcurrent protection suitably act from the hot influence of the miscellaneous part because generating heat energization.Electric working machine (1) possesses motor (15), rectification circuit, drive circuit and over-current protecting element (13).At least one party in rectification circuit and drive circuit is installed on circuit substrate (30).Over-current protecting element (13) is arranged at the electrical path to rectification circuit supply alternating electromotive force; and it is configured to generate heat by the electric current flowed in itself; according to its caloric value, cut off from the electrical path of the alternating electromotive force of outside input or be limited in the electric current flowed in the electrical path.Over-current protecting element (13) and circuit substrate (30) configured separate.

Description

Electric working machine

Technical field

This disclosure relates to be configured to alternating electromotive force be carried out using rectification circuit the electric working machine of rectification and motor.

Background technology

In patent document 1, record and rectification is carried out simultaneously to the alternating electromotive force inputted from AC power using rectification circuit The electric tool for the structure for supplying to inverter and being powered from inverter to brushless electric machine.

In the electric tool of this spline structure, have with the failure because of rectification circuit or other elements, circuit etc. therefore Hinder and occur for the purpose of protecting instrument or mains side from the power supply short circuit in the case of power supply short circuit, and in alternating electromotive force Input the situation that path sets fuse.

In the existing electric tool for the fuse for possessing protection, fuse, which is typically mounted at, to be provided with for controlling In the circuit substrate of the various circuits of the driving of motor.

Patent document 1：Japanese Unexamined Patent Publication 2015-020257 publications

For fuse, due to needing suitably to ensure the distance between terminal on safety requirements, so relatively Large-scale situation is more.Therefore, if fuse is installed on into circuit substrate, the maximization of circuit substrate is caused.

In addition, circuit substrate is due to having the situation for installing the part much to be generated heat by energization or having configuration in motor Situation on the dynamic stream of cooling airflow, so the destabilizing factor in temperature be present.Therefore, if such a temperature be present On destabilizing factor in the environment of configure fuse, then exist due to surrounding temperature influence and fuse irregular working Possibility.

Specifically, although for example, in the presence of the excessive electric current for actually flowing through fusing degree, due to the cooling of motor Wind and fuse are cooled so as to the possibility of state for continuing not fuse.Although in addition, for example, in the presence of not yet flowing through fusing journey The larger electric current of degree, but the possibility to be fused by hot influenceed of the heat generating components from surrounding.

Utility model content

An aspect of this disclosure is preferred to be suppressed to make electricity from the hot influence of the miscellaneous part to generate heat by energization The element of stream protection suitably acts.

One mode of the disclosure is a kind of electric working machine, possesses motor, rectification circuit, drive circuit, circuit substrate And over-current protecting element.Motor is configured to drive front operation instrument.Rectification circuit is configured to being supplied from AC power Alternating electromotive force carry out rectification.Drive circuit is configured to the drive based on the electric power generation motor after the rectification exported from rectification circuit The electric power employed simultaneously is supplied to motor.At least one party in rectification circuit and drive circuit is installed in circuit substrate.

Over-current protecting element is arranged at the electrical path to rectification circuit supply alternating electromotive force, and is configured to by certainly The electric current flowed in body generates heat, and according to its caloric value, cuts off electrical path or limit the electricity flowed in electrical path Stream.The over-current protecting element be not installed on circuit substrate and with circuit substrate configured separate.

At least one party in rectification circuit and drive circuit is installed in circuit substrate, these each circuits because of energization and The relatively large possibility of caused caloric value is higher.Therefore, by by over-current protecting element and circuit substrate configured separate, It can suppress to make over-current protecting element suitably act from the hot influence of the miscellaneous part because generating heat energization.

In addition, over-current protecting element can also be configured to by being fused according to caloric value to cut off electrical path Fuse.

The electric working machine of said structure can also possess the substrate reception housing for being accommodated with circuit substrate.In the situation Under, over-current protecting element can also configure at spaced intervals with substrate reception housing.According to such structure, electricity can be made Stream protection element more reliably separates with circuit substrate.

Can also：Possesses power line, the power line, which has, to be connected with AC power and be used for electronic from AC power to this A pair of electric wires of working rig input AC electric power, in the case where rectification circuit is installed on into circuit substrate, overcurrent protection member Part is attached in such a way.That is, can also over-current protecting element first end not via circuit substrate and with a pair One in electric wire that is, the connection of the first electric wire, the second end is connected with circuit substrate.It is furthermore, it is also possible to another in a pair of electric wires Individual that is, the second electric wire is connected with circuit substrate.

According to such structure, power line, over-current protecting element and circuit substrate this three can be efficiently carried out Between wiring.

Can also the electric working machine of said structure be also equipped with fan and shell.Fan is configured to the rotation along with motor And rotate, and be configured to produce air-flow by rotation.Motor, rectification circuit, drive circuit, circuit are accommodated with shell Substrate, over-current protecting element and fan, and formed with least one inner space for making to be accommodated with these parts and outside The blow vent of portion's connection.In addition, shell is configured to：If fan rotates, the air-flow along specific stream is produced in shell. Moreover, in possessing the structure of fan and shell like this, over-current protecting element can also be configured at and as caused by fan The position of the above-mentioned specific stream interval of air-flow.

According to such structure, the air flow contacts over-current protecting element as caused by fan can be suppressed, so can press down Make caused by fan air-flow to over-current protecting element temperature band Lai influence.

In the case where possessing shell as described above, can also be extended in a unitary manner in shell has holding Portion.Handle part is the part of hollow tube-shape, and be the electric working machine user use the electric working machine when institute handle The part held.Furthermore, it is also possible to over-current protecting element is configured at the inner space of handle part.

The inner space of handle part is and the stream of caused air-flow separates in shell and air-flow difficultly flows into by fan Position.Therefore, by the way that over-current protecting element to be configured to the inner space of handle part, can more be difficult to by by fan The influence of caused air-flow, over-current protecting element can be made more suitably to act.

, can also be in the inner space of handle part, to stand up in handle part in the case where possessing handle part The mode of side face is provided with rib, and formed with the specific space by rib and inner peripheral surface encirclement.In this case, can also incite somebody to action Over-current protecting element is configured in above-mentioned specific space.

According to such structure, it can more efficiently suppress influence of the heat of surrounding to over-current protecting element.In addition, Miscellaneous part from heat transfer caused by over-current protecting element to surrounding, wiring etc. can be suppressed.

Over-current protecting element can also be covered by the pipe of insulating properties.According to such structure, it is possible to increase over current protection The insulating properties of protection element and miscellaneous part.In addition, by accompanying pipe between over-current protecting element and miscellaneous part, can Suppress the heat transfer between over-current protecting element and miscellaneous part, be mutually difficult to affected by the heat.

Brief description of the drawings

Fig. 1 is the stereogram for the electric working machine for representing embodiment.

Fig. 2 is the electrical circuit diagram of the electric working machine of embodiment.

Fig. 3 be represent from cut-out direct of travel on the right side of from embodiment electric working machine inside state it is brief Structure chart.

Fig. 4 is Fig. 3 A-A sectional views.

Fig. 5 is the explanation figure for the internal structure for representing fuse packaging container.

Fig. 6 is the explanation figure for the wind path for representing the cooling wind in main body cover.

Description of reference numerals：1 ... electric working machine, 4 ... saw blades, 7 ... main body covers, the blow vents of 7a ... first, 7b ... Two blow vents, 8 ... motor incorporating sections, 9 ... controller incorporating sections, 10 ... handles, 10a ... handle housings, 11 ... Operation switches, 12 ... power lines, the electric wires of 12a ... first, the electric wires of 12b ... second, 13 ... fuses, 13a, 13b ... wire, 15 ... motors, 16 ... Fan, 18 ... ribs, 20 ... accommodation spaces, 21 ... fuse packaging containers, 23,24 ... crimp type terminals, 25 ... first layer pipes, 26 ... Two layers of pipe, 28 ... controller shells, 30 ... controllers, 30a ... substrate connection lines, 31 ... smoothing capacity devices, 35 ... rectification circuits, 38 ... control circuits, 41 ... piezo-resistances, 70 ... streams, 100 ... AC powers.

Embodiment

Hereinafter, embodiment of the present disclosure is illustrated referring to the drawings.

[1. embodiment]

The overall structure of (1-1) electric working machine

As shown in figure 1, the electric working machine 1 of embodiment is configured to use as main purpose to cut off processed part Circular saw, possess pedestal 2 and main part 3.Pedestal 2 is the quilt with cut-out object when be processed the cut-out operation of part The substantially rectangular part that the upper surface of processing component abuts.Main part 3 is configured at the upper surface side of pedestal 2.

Main part 3 possesses the circular saw blade 4 as front operation instrument, saw blade shell 5, cover 6, main body cover 7 and hand Handle 10.Saw blade 4 is configured on the right side of the cut-out direct of travel of main part 3.Saw blade shell 5 is arranged to the upside of saw blade 4 almost half cycle The periphery of scope be accommodated in inside and cover.Cover 6 is arranged to cover the periphery of the downside almost scope of half cycle of saw blade 4.

In addition, cover 6 is open and close type, Fig. 1 shows the state that cover 6 is closed.It is electronic by making when cut-out is processed part Working rig 1 moves along cut-out direct of travel, is rotated in an anti-clockwise direction so as to cover 6 centered on the pivot of saw blade 4 along figure And slowly open.Thus, saw blade 4 exposes, and the incision of its exposed portion is processed part.

Main body cover 7 is configured on the left of the cut-out direct of travel of main part 3.Main body cover 7 has substantially cylindric electricity Machine incorporating section 8 and the controller incorporating section 9 of approximately parallelepiped body shape.

It is accommodated with motor incorporating section 8 as the motor 15 of driving source and the fan 16 of cooling for rotating saw blade 4. The controller 30 of the driving of controlled motor 15 is accommodated with controller incorporating section 9.In addition, motor 15, fan 16 and control Device 30 is omitted and illustrated in Fig. 1, and figure 2 illustrates.

Between the motor incorporating section 8 of main part 3 and saw blade 4, the rotational deceleration for making motor 15 and transmission are accommodated with To the gear mechanism of saw blade 4.Fan 16 directly or via the rotary shaft of reducing gear etc. and motor 15 links, and is revolved in motor 15 Rotated when turning with together with motor 15.

In main body cover 7, the side on the left of cut-out direct of travel in motor incorporating section 8 is formed with the first blow vent 7a, the cut-out direct of travel rear end face in controller incorporating section 9 is formed with the second blow vent 7b.The inside of main body cover 7 is empty Between connected with outside via these each blow vent 7a, 7b.

In main part 3, the handle 10 that the user for electric working machine 1 is held is set and overarched.That is, handle The cut-out direct of travel rear end side of main part 3 is fixed in 10 one end, and the other end is fixed in than the rear end by cutting off traveling side Forwards.In addition, in the present embodiment, main part 3 and handle 10 are for example integrally formed using resin material.

The surface side opposed with main body cover 7 of handle 10 is provided with the Operation switch 11 of triggering form.Electric working machine 1 User can be in one's hands in the state of handle 10 and operate Operation switch 11.In addition, pass through the Operation switch in pull operation Locking press button (not shown) is pressed into the state of 11, Operation switch 11 can be made to be fixed on the state of the pull operation.

From the cut-out direct of travel rear end extracting power supply cord 12 of main part 3.It is provided with the front end of power line 12 not shown Attaching plug.Power line 12 is used for the electric power for obtaining the driving of motor 15.By the way that the power supply of the front end of power line 12 is inserted The socket of the AC powers 100 such as head insertion industrial power, electric power can be obtained from AC power 100 via power line 12.In addition, AC power 100 omits diagram in Fig. 1, figure 2 illustrates.

The electrical structure of (1-2) electric working machine

The electrical structure of electric working machine 1 is illustrated using Fig. 2.As shown in Fig. 2 electric working machine 1 possesses motor 15th, controller 30, smoothing capacity device 31 and switch main body 40.

If by the socket of the AC power 100 outside the insertion of the attaching plug of the front end of power line 12, from AC power 100 via power line 12 to the input AC electric power of controller 30.Power line 12 has a pair of electric wire 12a, 12b, and therein first Electric wire 12a is connected with one end of fuse 13.The other end of fuse 13 is connected with substrate connection line 30a, via substrate connection Line 30a is connected with controller 30.The second electric wire 12b in a pair of electric wires 12a, 12b of power line 12 is connected with controller 30.

Therefore, if the electric current for flowing into power line 12 is excessive, fuse 13 fuses, the first electric wire 12a and controller 30 Connection is cut off, and the input to the alternating electromotive force of controller 30 is cut off.

Fuse 13 is Joule heat caused by the electric current for being configured to form the fuse element of itself by using flowing into send out Heat, it is excessive if electric current and fuse element fuses if caloric value reaches certain rank, so as to cut off the known excessively electric of electrical path Flow protection element.

The main purpose for setting fuse 13 is short trouble due to controller 30 inside and turned into from AC power 100 the state of excessive short circuit current is flowed into controller 30 in the case of cut off the excessive short circuit current.As control Short trouble inside device 30, such as in view of the short trouble of rectification circuit 35, the short trouble of piezo-resistance 41, smooth electricity The short trouble on road 36 etc..If short trouble as occurring, the input of the alternating electromotive force in controller 30 turns into short circuit State.

If generation short trouble as described above, the electric current that controller 30 is flowed into from AC power 100 becomes too much, but If excessive electric current as producing, the heating fusing of fuse 13.Thus, due to the alternating current path quilt of controller 30 Cut-out, so the secondary failure that can suppress to be caused by short trouble and then may occur.

In addition, as described later, fuse 13 is covered by the pipe of heat-shrinkable.Moreover, fuse 13 is formed by pipe covering A tectosome be fuse packaging container 21 and the configured separate at spaced intervals of controller 30.

Motor 15 is brushless electric machine.Motor 15 is connected with the IPM37 in controller 30, by being powered from IPM37 to rotate Driving." IPM " is the abbreviation of SPM.Motor 15 links with the fan 16 of cooling as described above, if motor 15 revolves Turn then fan 16 also to rotate.

Motor 15 is provided with the turn-sensitive device 33 of the rotation position for detecting motor 15.The rotation of present embodiment Sensor 33 has three Hall sensors, each Hall sensor with the interval configuration of 120 degree of electrical angle motor 15 rotor Around.Signal from each Hall sensor is input to the control circuit 38 in controller 30.

Smoothing capacity device 31 is one of inscape for forming smooth circuit 36 described later.More specifically, this embodiment party The smoothing capacity device 31 of formula is connected in parallel by two capacitors 31a, 31b and formed.Therefore, the capacity of smoothing capacity device 31 is two Individual capacitor 31a, 31b parallel synthesis capacity.Two capacitors 31a, 31b are electrolytic capacitor in the present embodiment. In addition, it is not necessary to be connected in parallel two capacitors to form smoothing capacity device 31.Smoothing capacity device 31 can also be one Capacitor or multiple capacitors by parallel, series connection or it is series-parallel in a manner of the structure that is formed by connecting.

Switch main body 40 is for carrying out the corresponding electricity output of the mode of operation of Operation switch 11 with being carried out by user Part, at least with make and break contact 40a.Make and break contact 40a is arranged on the bus line 39 from rectification circuit 35 to IPM37 On, the bus line 39 conducted, cut off.But in the present embodiment, on bus line 39 with make and break contact 40a Resistance R1 is connected in parallel to, so even if make and break contact 40a is disconnected, bus line 39 will not be also completely severed.

Make and break contact 40a is disconnected in the state of Operation switch 11 is not pulled operation, and behaviour is pulled in Operation switch 11 Connected in the state of work.In addition, switch main body 40 be configured to by represent the presence or absence of the pull operation of Operation switch 11 electric signal, In other words the electric signal that is, operation signal for representing make and break contact 40a on-off state are exported to the control in controller 30 Circuit 38 processed.

Controller 30 is configured to the alternating electromotive force supplied from AC power 100 being converted to the electric power of the driving of motor 15 simultaneously Supply to motor 15.The controller 30 of present embodiment forms the various of the controller 30 by being installed in a circuit substrate Circuit, part etc. and form.In other words, the entity of controller 30 is to be provided with the circuit base that various circuits, part etc. form Plate.

Controller 30 possesses rectification circuit 35, smooth circuit 36, IPM37, control circuit 38, voltage detecting circuit 42, electricity Current detection circuit 43, control power supply circuit 44 and discharge circuit 45.

Rectification circuit 35 possesses diode bridge, and the diode bridge has four diodes, to the alternating current inputted Power carries out full-wave rectification.It is rectified the electric power after the rectification of circuit 35 and is output to bus line 39.

Smooth circuit 36 is set for the electric power smoothing after the rectification that will be exported from rectification circuit 35, possess on The smoothing capacity device 31 and surge current suppression circuit 48 stated.Specifically, one end of smoothing capacity device 31 and bus line 39 Connection, the other end of smoothing capacity device 31 are connected with surge current suppression circuit 48.In addition, in the present embodiment, smooth electricity Smoothing capacity device 31 possessed by road 36 and the smoothing capacity device 31 in surge current suppression circuit 48 are not installed at circuit base On plate, with circuit substrate configured separate.

Surge current suppression circuit 48 is excessive and set in order to suppress charging current to smoothing capacity device 31.Surge The structure of current suppressing circuit 48 considers various structures, for example, it is also possible to have resistor, the resistor is arranged at smooth electricity Electrical path between container 31 and ground wire.In addition, for example, it is also possible to have switch element, the switch element is arranged to Electrical path between enough conducting/cut-out smoothing capacity devices 31 and ground wire.In addition, for example, it is also possible to by resistor with it is above-mentioned Switch element be connected in parallel.In addition, for example, it is also possible to opened for the series-connection circuit of resistor and switch element and above-mentioned Close the structure that element in parallel is formed by connecting.It can also be the control in the case where surge current suppression circuit 48 has switch element The structure that circuit 38 processed is controlled to the on-off of the switch element.

IPM37 be the various circuits such as inverter, the drive circuit for driving the inverter, protection circuit are packaged into one and Into equipment.Inverter is the "on" position or respective to each phase coil for the coil of each phase by cutting reversing motor 15 Electrical current is controlled to make the circuit of the rotation driving of motor 15.The inverter of present embodiment is that possess as high-side switch Three switch elements and three switch elements as low side switch known structure.In addition, each switch element is, for example, IGBT.But the use of IGBT is an example as each switch element, other kinds of switch element can also be used.

In IPM37, drive circuit makes possessed by inverter six to open according to the driving instruction from control circuit 38 Separately on-off is closed, so as to carry out the energization to motor 15.

Voltage detecting circuit 42 is connected with bus line 39, and the magnitude of voltage to bus line 39 is that bus voltage value is examined Survey, and the voltage detection signal for representing the bus voltage value detected is exported to control circuit 38.Current detection circuit 43 It is arranged on the electrical path from IPM37 to ground wire, the value i.e. load current value of the load current to flowing through the electrical path Detected, and the current detection signal for representing the load current value detected is exported to control circuit 38.Control electricity consumption Source circuit 44 generates the action power supply in each portion in controller 30.

Discharge circuit 45 is to make smoothing capacity device 31 in the case where pulling out attaching plug without input AC electric power Charging power discharges rapidly and makes what the rapid stopping of motor 15 was main purpose to set.The discharge circuit of present embodiment 45 Such as there is the resistance that one end is connected with bus line 39, the other end connects with ground wire.

On the bus line 39 from the lead-out terminal of rectification circuit 35 to IPM37, in the connection position than smooth circuit 36 Rest against downstream and be connected with make and break contact 40a.The electric power after circuit 36 smooths is smoothed to be input to via make and break contact 40a IPM37。

In addition, between path and ground wire between make and break contact 40a and IPM37 in bus line 39, it is connected with For removing the buffer condenser Cs of high-frequency noise from bus line 39.Buffer condenser Cs is non-polar capacitor, and it holds Amount is very small compared with the capacity of smoothing capacity device 31.

In addition, on bus line 39, resistance R1 is connected in parallel with make and break contact 40a.In the present embodiment, resistance R1 E.g. hundreds of k Ω relatively large resistance value.Resistance R1 is to be disconnected also in advance to buffering electricity even if make and break contact 40a Container Cs is charged as main purpose and set.

In the controller 30, in the leading portion side of rectification circuit 35, i.e., it is provided between fuse 13 and rectification circuit 35 For the piezo-resistance 41 for the internal circuit that controller 30 is protected from overvoltage.

In addition, piezo-resistance 41 is configured in the controller incorporating section 9 shown in Fig. 1.Piezo-resistance 41 have there occurs Pyrophoric situation is produced in the case of short trouble.Therefore, in the present embodiment, by piezo-resistance 41 in controller incorporating section In 9 configuration from the outside of electric working machine 1 via the second blow vent 7b can not visual confirmation piezo-resistance 41 main body, and And from the outside through by the second blow vent 7b can not visual confirmation when short trouble occurs for piezo-resistance 41 from piezo-resistance The position of spark caused by 41.

In the present embodiment, the structure centered on the known microcomputer with CPU, memory etc. of control circuit 38 Into.Memory includes at least one in the various semiconductor memories such as RAM, ROM, flash memory.The various functions of control circuit 38 Performed by CPU and be stored in the program of non-diverting entity record medium to realize.In this example embodiment, memory is equivalent to storing The non-diverting entity record medium of program.

In addition, the quantity of microcomputer possessed by control circuit 38 can be one or be multiple.In addition, Function possessed by control circuit 38 is not limited to realize by software, can also used to logic circuit, analog circuit The hardware being formed by combining realizes some or all of function.

Operated if control circuit 38 detects that Operation switch 11 is pulled based on the operation signal from switch main body 40 Situation, then by IPM37 output drive signals, drive motor 15.

Part configuration inside (1-3) electric working machine

The part configuration status of the inside of electric working machine 1 is illustrated using Fig. 3.As shown in figure 3, in main body cover 7 motor incorporating section 8 is configured with motor 15 and fan 16.Further, since from fan 16, motor 15 is positioned at cut-out traveling side To the left, so in figure 3, motor 15 turns into the state blocked by fan 16.

Controller 30 is configured with the controller incorporating section 9 of main body cover 7.In addition, controller 30 is to be incorporated in substantially State in the controller shell 28 of rectangular-shape configures.

Handle 10 has the handle housing 10a for the hollow tube-shape for being formed as arch.Match somebody with somebody in handle housing 10a inner space It is equipped with Operation switch 11, switch main body 40 and fuse packaging container 21.

As shown in figure 4, fuse packaging container 21 in handle housing 10a inner space, is configured in the receipts divided by rib 18 Receive in space 20.As shown in figure 3, rib 18 is the plate-shaped member that substantially crank shape substantially at right angles is bent at two.Such as Fig. 4 Shown, rib 18 generally perpendicularly erects setting in handle housing 10a inner space with the inner peripheral surface from handle housing 10a Mode is extended.Accommodation space 20 is that the space formed is surrounded by rib 18 and handle housing 10a inner peripheral surface.

The state that fuse packaging container 21 is contacted with the inner peripheral surface with rib 18 and handle housing 10a is accommodated in accommodation space In 20, thus, the allocation position in handle housing 10a is fixed, and the movement in handle housing 10a is limited.

In addition, handle housing 10a utilizes resin forming, but its outer surface is covered by elastomer 10b as shown in Figure 4.Utilize Elastomer 10b covering is to be difficult to be transferred to inside (the particularly hardly possible of electric working machine 1 with the heat of the outside of electric working machine 1 To be transferred to fuse 13), implement for the purpose of hand for being difficult to be transferred to user from heat caused by fuse 13 etc..

The first electric wire 12a in a pair of electric wires 12a, 12b possessed by power line 12 as also illustrate that in fig. 2 It is connected with one end of the fuse 13 in fuse packaging container 21.The other end of fuse 13 in fuse packaging container 21 and control Device 30 processed passes through the 30a connections of substrate connection line.

The second electric wire 12b in a pair of electric wires 12a, 12b possessed by power line 12 is connected with controller 30.

So, in the present embodiment, controller 30 is accommodated in controller incorporating section 9, in contrast, fuse packaging container 21 configurations are in handle housing 10a.In other words, fuse packaging container 21 and controller 30 are independent, between being separated with controller 30 Configured every ground, thus, can suppress to bring influence from heat caused by controller 30 to the fuse 13 in fuse packaging container 21.

Substrate connection line 30a and the second electric wire 12b are with the border by being formed at main body cover 7 and handle housing 10a The mode of the routing path 50 in region is laid on cut-out direct of travel rear portion side.In routing path 50, with from main body cover 7 Cut off the inwall of direct of travel front side and cut off what the mutual direction of this twocouese of the inwall of direct of travel rear side protruded Mode, which is erect, is provided with rib 51,52.

Each rib 51,52 is formed as at least making substrate connection line 30a and the second electric wire 12b by routing path 50, and Routing path 50 is cut off as overall.As setting the purpose of each rib 51,52, for example, can enumerate improve substrate connection line 30a with And second electric wire 12b wiring operation when workability, make the inner space of main body cover 7 and handle housing 10a inside empty Between between close to dissengaged positions etc..

In addition, in figure 3, it is illustrated that there is the first electric wire 12a to be directly connected to fuse packaging container 21, the second electric wire 12b with The state that controller 30 is directly connected to, but each like this electric wire 12a, 12b and connecting object are directly connected to be not essential.Example Such as, the wire for the first electric wire 12a to be connected with fuse packaging container 21 can also be prepared, using connector by the first electric wire One end of 12a and wire is connected, and the other end of wire is connected with fuse packaging container 21.For the second electric wire 12b, for example, The wire for the second electric wire 12b to be connected with controller 30 can also be prepared, using connector by the second electric wire 12b and wire One end connection, the other end of wire is connected with controller 30.

Between controller 30 and motor 15, it is equipped with to be powered to driving to motor 15 for the IPM37 from controller 30 and uses Electric power driving with wiring 71.In the present embodiment, driving wiring 71, which has, is used for U phases, V phases, W phases this 3 phase of being powered Electric current three wires.

In addition, it is equipped between controller 30 and the turn-sensitive device being arranged near motor 15 33 for that will come from The signal of turn-sensitive device 33 is inputted to the wiring 72 of the signal of controller 30.Signal wiring 72 includes being used to pass from rotation Each signal of three Hall sensor outputs is inputted to three wires of controller 30, for power supply to be supplied possessed by sensor 33 To wire to each Hall sensor etc..

Driving wiring 71 and signal connect up 72 with the substrate connection for being arranged at motor 15, via the substrate and company The motor 15 and turn-sensitive device 33 for connecing object connect.

Driving is connected to the position being separated from each other in the controller 30 with signal with wiring 71 with wiring 72.Specifically, As shown in fig. 6, driving wiring 71 is connected to the relatively right-hand member side in the region on the right side of the cut-out direct of travel in controller 30.Phase Instead, signal is connected to the relatively left end in the region cut off on the left of direct of travel in controller 30 with wiring 72 via connector Side.In addition, the second electric wire 12b and substrate connection line 30a is connected to cutting in controller 30 identically with driving wiring 71 Region on the right side of disconnected direct of travel.In other words, in the controller 30, the wiring master of the relatively large strong power system of electrical current The region being connected on the right side of cut-out direct of travel, the wiring of the relatively small weak electricity system of electrical current are mainly connected to cut-out Region on the left of direct of travel.

The structure of (1-4) fuse packaging container

The detailed construction of fuse packaging container 21 is illustrated using Fig. 5.Fuse packaging container 21 is to utilize thermal contraction Property the structure that forms of pipe covering fuse 13.

More specifically, wire 13a, 13b are connected at the both ends of fuse 13.It is connected with one end of fuse 13 Wire 13a be connected by crimp type terminal 23 with the first electric wire 12a of power line 12.Led with what the other end of fuse 13 was connected Line 13b is connected by crimp type terminal 24 with substrate connection line 30a.First electric wire 12a and substrate connection line 30a are from identical Direction insertion fuse packaging container 21.

As shown in figure 5, each equal Integral bending of wire 13a, 13b substantially 180 degree.The wire being connected with one end of fuse 13 13a and the first electric wire 12a inserts crimp type terminal 23 from identical direction.On the other hand, the other end with fuse 13 is connected Wire 13b and substrate connection line 30a from the opposed direction of 180 degree each other insertion crimp type terminal 24.

Moreover, fuse 13, each wire 13a, 13b and crimp type terminal 24 are covered by first layer pipe 25.Also, first layer Pipe 25 and crimp type terminal 23, also the part including the first electric wire 12a and substrate connection line 30a, is covered by second layer pipe 26 Lid.

In addition, first layer pipe 25 and second layer pipe 26 are, for example, the heat-shrinkable for the resin for having used polyolefin and absolutely The pipe of edge.In addition, " insulating properties " mentioned here means with can under use state at least in rated range Maintain the insulating properties of the degree of the electric insulation of fuse 13 and miscellaneous part, circuit etc..

The stream of (1-5) cooling wind and the relation of the position of fuse

During motor 15 rotates, fan 16 also rotates.If fan 16 rotates, in the inside of main body cover 7, produce The air-flow as caused by fan 16.

The main stream 70 of air-flow as shown in Fig. 3 and Fig. 6, is flowed into from the first blow vent 7a as caused by fan 16 The inside of main body cover 7, via motor 15 and controller shell 28, from the second blow vent 7b to the stream of outside outflow.

In addition, Fig. 6 is briefly shown with the state of the inside of main body cover 7 from the side of handle 10.In addition, Fig. 3 and Fig. 6 Shown stream 70 simply briefly represents the direction of air-flow, does not represent direction, the scope of actual wind flow strictly.

In main body cover 7, motor 15 and controller shell 28 are configured as caused by fan 16 on the stream 70 of air-flow. Therefore, each portion of the configuration on stream 70 such as motor 15, controller 30 suppresses to generate heat by the air-flow caused by fan 16.

On the other hand, the air-flow caused by fan 16 does not almost flow into the inside sky for the handle housing 10a for forming handle 10 Between.In addition, by producing the air-flow along stream 70, so as to also there is the possibility for the flowing for producing air in handle housing 10a Property, but the flowing, compared with the air-flow along stream 70, flow is considerably less.

Particularly, in the present embodiment, as shown in figure 3, laying substrate connection line 30a's and the second electric wire 12b Routing path 50 is provided with rib 51,52.As described above, these ribs 51,52 are inner space and handle case so that main body cover 7 What body 10a inner space was set closer to dissengaged positions for one of main purpose., can be more by these ribs 51,52 Effectively suppress the air-flow as caused by fan 16 to flow into handle housing 10a by routing path 50.

Therefore, for being configured at the handle housing 10a fuse packaging container 21 of inner space, do not contact completely by Air-flow caused by fan 16, or even if contact and faint amount, so can actually ignore the gas as caused by fan 16 The influence of stream.

So, in the present embodiment, the fuse packaging container 21 comprising fuse 13 is not installed on controller 30, but It is configured at the position with the interval of controller 30 and is the position with the interval of stream 70 of air-flow as caused by fan 16 Put.Thus, being generated heat even if controller 30 also will not be by the heat transfer (or being difficult to transmit) to fuse 13, and even if fan 16 rotations produce air-flow, and the air-flow will not also contact (or hardly contacting) fuse packaging container 21.

The effect of (1-6) embodiment

Embodiment from the description above, play following (1a)~(1f) effect.

(1a) fuse 13 is not installed on controller 30, but with the configured separate of controller 30.More specifically, fuse 13 configure at spaced intervals with being accommodated with the controller shell 28 of controller 30.

Rectification circuit 35 and the circuit substrate of IPM37 both sides are installed, caloric value is larger caused by because of energization.Cause This, by the way that fuse 13 is separate and spaced from into a certain degree of distance to configure with controller 30, can suppress from controller 30 Caused hot influence and fuse 13 is suitably acted.

The first electric wire 12a in a pair of electric wires 12a, 12b possessed by (1b) power line is not via controller 30 and with melting One end connection of disconnected device 13.Moreover, the other end of fuse 13 and the second electric wire 12b of power line 12 are connected with controller 30.

By using such wiring method, can efficiently carry out power line 12, fuse 13 and controller 30 this Triangular wiring.

(1c) fuse 13 is not only separated with controller 30, configured at spaced intervals, is also configured in being produced by fan 16 Air-flow the interval of stream 70 position.Therefore, except that can suppress from heat transfer caused by controller 30 to fuse Beyond 13, can also suppress caused by fan air-flow to fuse 13 temperature band Lai influence.

(1d) fuse 13 is not arranged in main body cover 7, and is arranged in the handle being extended from main body cover 7 In housing 10a.Handle housing 10a inner space be separated with the stream of the air-flow as caused by fan 16, air-flow difficultly flows into Position.Therefore, by configuring fuse 13 in handle housing 10a inner space, can more be difficult to be produced by by fan The influence of raw air-flow, fuse 13 can be made more suitably to act.

(1e) is in addition, fuse 13 in handle housing 10a, is configured at the inner circumferential bread by rib 18 and handle housing 10a In the accommodation space 20 enclosed.Therefore, it is possible to more efficiently suppress influence of the heat of surrounding to fuse 13.

(1f) is further, since fuse 13 is covered by the pipe of insulating properties, so being ensured with higher rank and miscellaneous part Insulating properties.In addition, by accompanying pipe between fuse 13 and miscellaneous part, can suppress fuse 13 and miscellaneous part it Between heat transfer.Particularly in the present embodiment, because the pipe for covering fuse 13 is first layer pipe 25 and second layer pipe 26 two layers of construction, so realizing the suppression of above-mentioned insulating properties, heat transfer with higher rank.

(1-7) and the sentence of claims corresponding relation

Here, the corresponding relation of the sentence of the sentence to embodiment and claims remarks additionally.IPM37 phases When in an example of drive circuit.Controller shell 28 is equivalent to substrate reception housing.Handle 10 is equivalent to handle part.

[2. other embodiment]

More than, embodiment of the present disclosure is illustrated, but the disclosure is not limited to above-mentioned embodiment, energy Various modifications are enough carried out to implement.

The allocation position of (2-1) fuse 13 is not limited to the position shown in Fig. 3.Fuse 13 is configured at handle Itself also it is an example in housing 10a.

Fuse 13 is not mounted to controller 30, is separated with controller 30.In addition, gone back in addition to controller 30 In the case of with the larger circuit of caloric value, part etc., fuse 13 can also be configured at these circuits, part etc. every The standard width of a room in an old-style house every position.For example, rectification circuit 35 and the split of controller 30 are being configured and IPM37 is installed on to the feelings of controller 30 Under condition, fuse 13 can also be configured to the position with controller 30 and the both sides' interval of rectification circuit 35.

At least one in each circuit in controller 30 shown in Fig. 2 can also be not mounted to controller 30 by (2-2) And with the configured separate of controller 30.

The pipe of (2-3) as covering fuse 13, it is not necessary to use the pipe of heat-shrinkable.As long as it can at least send out Wave the pipe of desired insulating properties.In addition, the material of pipe nor is it necessary that be polyolefin resin.

Additionally, it is not necessary to the covering for the pipe of fuse 13 must be constructed as shown in Figure 5 two layers.For example, also may be used To save any one party in first layer pipe 25 and second layer pipe 26.

In addition, using pipe cover fuse 13, itself is not essential, can not also utilize pipe covering fuse 13 and Configured with the state exposed.

The forming position of (2-4) blow vent, determine reasonable quantity.In the above-described embodiment, show two Example of the place formed with blow vent, but blow vent can also be formed at one, can also be formed at three more than.

It is an example that (2-5), which uses fuse 13 as over-current protecting element,.As overcurrent protection member Part, can also using can by flow through the electric current of itself generate heat and according to the caloric value cut off electrical path or limitation flow The other elements of electric current through electrical path.As the over-current protecting element beyond fuse, such as PPTC elements can be enumerated. In addition, " PPTC " is " Polymer Positive Temperature Coefficient：High molecular polymer positive coefficient temperature The abbreviation of element ".

(2-6) is used as rectification circuit, and the rectification circuit 35 being made up of diode bridge shown in Fig. 2 is an example, The rectification circuit of the other structures beyond diode bridge can also be used.

In addition, it is not essential as drive circuit using IPM37.For example, it is also possible to it is to form respectively opening for inverter Pass element is discrete parts independently and they is separately installed on to the structure of controller 30.

(2-7) motor 15 can also be the motor beyond brushless electric machine.For example, it is also possible to it is band brushless motor.And And in the case of the motor beyond using brushless electric machine, for drive circuit, use the drive that can suitably drive the motor Dynamic circuit.

(2-8) in the above-described embodiment, an example as electric working machine shows circular saw, but the disclosure It can be applied to be configured to carry out the alternating electromotive force supplied from AC power rectification and supply to the driving electricity of motor driving The various electric working machines on road.More specifically, the disclosure can be applied to electrically operated hammer, electric hammer drill, electric drill, electric screw It is knife, electric wrench, motor-driven mill, electric reciprocating saw, power saws, electrically operated hammer, electric slicer, electric chain saw, electric planer, electronic Nail gun (including thumb pin pressing device), electric hedge shears, electric grass mower, electric lawn are cut, power-operated mower, electric dust collector, The electric working machines such as electric blower.

Multiple functions possessed by an inscape in above-mentioned embodiment can also be passed through multiple structures by (2-9) Realized into key element, One function possessed by an inscape is realized by multiple inscapes.Alternatively, it is also possible to Multiple functions possessed by multiple inscapes are realized by an inscape, or will be realized by multiple inscapes One function realized by an inscape.Alternatively, it is also possible to omit a part for the structure of above-mentioned embodiment.Separately Outside, at least a portion of the structure of above-mentioned embodiment can also be added or put to the structure of other above-mentioned embodiments Change.In addition, all modes that the technological thought that the sentence according to described in claims determines is included all are the disclosure Embodiment.

Claims (8)

1. a kind of electric working machine, wherein, possess：

Motor, consist of driving front operation instrument；

Rectification circuit, consist of and rectification is carried out to the alternating electromotive force supplied from AC power；

Drive circuit, consist of the drive that the motor is generated based on the electric power after the rectification exported from the rectification circuit The electric power employed simultaneously is supplied to the motor；

Circuit substrate, it is provided with least one party in the rectification circuit and the drive circuit；And

Over-current protecting element, it is arranged at the electrical path that the alternating electromotive force is supplied to the rectification circuit, and forms To be generated heat by the electric current flowed in itself, and according to its caloric value, cut off the electrical path or limitation is described logical The electric current flowed in power path,

The over-current protecting element be not installed on the circuit substrate and with the circuit substrate configured separate.

2. electric working machine according to claim 1, wherein,

The over-current protecting element is configured to by being fused according to the caloric value to cut off the molten of the electrical path Disconnected device.

3. the electric working machine according to claims 1 or 2, wherein,

The electric working machine possesses the substrate reception housing for being accommodated with the circuit substrate,

The over-current protecting element configures at spaced intervals with the substrate reception housing.

4. electric working machine according to claim 1, wherein,

The rectification circuit is installed on the circuit substrate,

The electric working machine is also equipped with power line, and the power line, which has, to be connected with the AC power and be used to make the exchange A pair of electric wires that electric power inputs from the AC power to the electric working machine,

The first end of the over-current protecting element not via the circuit substrate and with one in the pair of electric wire that is, First electric wire is connected, and the second end of the over-current protecting element is connected with the circuit substrate,

Another that is, the second electric wire in the pair of electric wire are connected with the circuit substrate.

5. electric working machine according to claim 1, wherein,

The electric working machine possesses：

Fan, consist of along with the rotation of the motor and rotate, and be configured to produce air-flow by rotation；And

Shell, it stores the motor, the rectification circuit, the drive circuit, the circuit substrate, the overcurrent protection Element and the fan, and formed with the ventilation of at least one inner space and ft connection for making the carry out storage Mouthful,

If the shell is configured to the fan rotation, the air-flow along specific stream is produced in the shell,

The over-current protecting element is configured in the position with the stream interval.

6. electric working machine according to claim 5, wherein,

Being extended in a unitary manner in the shell has handle part, and the handle part is the part of hollow tube-shape and supplies this electronic The user of working rig is held when using the electric working machine,

The over-current protecting element is configured in the inner space of the handle part.

7. electric working machine according to claim 6, wherein,

In the inner space of the handle part, to be provided with rib in a manner of standing up the inner peripheral surface of the handle part, and Formed with by the rib and the inner peripheral surface encirclement specific space,

The over-current protecting element is configured in the specific space.

8. electric working machine according to claim 1, wherein,

The over-current protecting element is covered by the pipe of insulating properties.