CN206445294U - Electric tool - Google Patents

Abstract

The utility model discloses a kind of electric tool, especially a kind of electric saw, it includes：Functor, motor, housing and fan, housing include electric machine casing portion；Housing is formed with air flow inlet and air stream outlet, and the air-flow at air flow inlet is extracted when fan is rotated and air-flow is got rid of after motor is flowed through to air stream outlet；Electric machine casing portion includes the circular portion of wound motor and is arranged on around the end of portion one end；Motor includes：Stator, motor shaft and rotor, stator are fixed with respect to housing, and motor shaft is spindle rotationally arranged in housing, and rotor around stator and constitutes synchronous axial system with motor shaft；Wherein, electric tool also includes：Stop part, stop part includes being arranged on the stopper section of rotor and the gap location between portion；Stop part is at least partially disposed at outside projection of the rotor in the plane in a projection in the plane of the pivot center of rotor.Stop part can backstop air-flow from the one of motor lateral opposite side backflow, so as to improve the temperature rise effect of motor.

Description

Electric tool

Technical field

The utility model is related to a kind of electric tool, especially a kind of electric saw.

Background technology

Electric circular saw is a kind of instrument by driving saw blade to carry out sawing action, with safe and reliable, rational in infrastructure, work The features such as efficiency high.Electric circular saw is generally included：Housing, motor, bottom plate, angle adjusting mechanism, depth adjustment structure and guiding Device.

When using electric circular saw, user is frequently necessary to carry out operation in high-altitude, it is therefore desirable to hangs up electric circular saw, is This, electric circular saw can also include the hook for hanging.But the position of existing hook and structure setting are unreasonable, generally The hand of the electric circular saw can be operated to cause interference to user, so as to influence the use of user.

Motor is arranged in housing, the phenomenon of radiating airflow backflow occurs at motor, so as to cause the temperature rise of motor Effect is poor.

Angle adjusting mechanism is arranged on bottom plate, and it is for adjusting the angle of inclination that saw blade is cut for user.But It is user when adjusting angle of inclination, it is generally difficult to fast and accurately realize the setting at angle of inclination.

Depth adjusting mechanism is used for the depth of cut that saw blade is adjusted for user, but existing depth adjusting mechanism is often There is the error for swinging and causing graduation indication.

Guider is used to guide saw blade to realize straight cuts, and existing guider can mostly just realize short distance Straight cuts.

In addition, saw blade is generally attached on main frame by existing electric circular saw by screw, so when needing dismounting saw blade, The servicing units such as screwdriver are needed to use, so as to be unfavorable for the operation of user.

Utility model content

To solve the deficiencies in the prior art, the purpose of this utility model is the electronic work for providing a kind of good heat dissipation effect Tool.

In order to realize above-mentioned target, the utility model is adopted the following technical scheme that：

A kind of electric tool, including：Functor, motor, housing and fan, functor are used for implementation tool function, motor For driving function part, housing includes the electric machine casing portion for being used to accommodate motor, and fan is arranged on the remote functor of motor Side；Housing is formed with air flow inlet and air stream outlet, and fan can extract the air-flow at air flow inlet and air-flow is existed when rotating Flow through and got rid of after motor to air stream outlet；Electric machine casing portion includes the circular portion of wound motor and is arranged on around the end of portion one end Portion；Motor includes：Stator, motor shaft and rotor, stator are fixed with respect to housing, and motor shaft is spindle rotationally arranged in housing, are turned Son around stator and constitutes synchronous axial system with motor shaft；Wherein, electric tool also includes：Stop part, stop part includes being arranged on The stopper section of rotor and the gap location between portion；Stop part is in a throwing in the plane of the pivot center of rotor Shadow is at least partially disposed at outside projection of the rotor in the plane.

Further, stop part is constituted with stator and is fixedly connected.

Further, stopper section surrounding rotor；Stop part also includes：First extension, the first extension is from stopper section edge It is radially orientated the direction extension away from motor and outside the radially extending gap to rotor and between portion.

Further, stop part also includes：Second extension, the second extension is from stopper section radially toward close to motor Direction extension and outside the radially extending gap to rotor and between the portion.

Further, direction of the stopper section along the pivot center parallel to rotor extends, and stopper section is parallel to rotor Length on the direction of pivot center is more than the length of the first extension diametrically.

Further, stopper section and the full-size of gap diametrically between the portion be less than rotor with around portion it Between gap minimum dimension diametrically.

Further, stopper section and the full-size of gap diametrically between portion are less than or equal to more than 0mm 2mm。

Further, fan is centrifugal fan.

Further, rotor is also formed with：Positioned at stator close to the side of fan passage.

A kind of electric saw, including：Cutting member, motor, housing and fan, cutting member are used to cut workpiece, and motor is used to drive Cutting member, housing includes the electric machine casing portion for being used to accommodate motor, and fan is arranged on the side of the remote cutting member of motor；Housing Air flow inlet and air stream outlet are formed with, fan can extract the air-flow at air flow inlet and make air-flow after motor is flowed through when rotating Get rid of to air stream outlet；Electric machine casing portion includes the circular portion of wound motor and is arranged on around the end of portion one end；Motor includes： Stator, motor shaft and rotor, stator are fixed with respect to housing, and motor shaft is spindle rotationally arranged in housing, and rotor surrounds stator simultaneously Synchronous axial system is constituted with motor shaft；Wherein, electric saw also includes：Be at least partially disposed in rotor and gap location between the portion with The stop part flowed back for backstop air-flow by motor close to a lateral opposite side of fan.

It is of the present utility model to be beneficial in that：The backstop for backstop airflow reflux is provided between housing and motor Part, so as to improve the temperature rise effect of motor.

Brief description of the drawings

Fig. 1 is the stereogram of the electric circular saw as one embodiment；

Fig. 2 is the plan of the electric circular saw in Fig. 1；

Fig. 3 is the profile of the electric circular saw in Fig. 1；

Fig. 4 is the profile of partial shell, motor and fan in Fig. 1；

Fig. 5 is the stereogram of the stop part in Fig. 4；

Fig. 6 is circular portion in Fig. 4 and stop part in a projection in the plane of the pivot center of rotor Schematic diagram；

Fig. 7 is the sectional view of circular portion in Fig. 4, rotor and stop part；

Fig. 8 is the stereogram of partial shell in Fig. 1 and hanging hook assembly, and wherein connector is located at first position；

Fig. 9 is the plan of structure shown in Fig. 8；

Figure 10 is the stereogram of the hanging hook assembly in Fig. 8；

Figure 11 is the stereogram of partial shell in Fig. 1 and hanging hook assembly, and wherein connector is located at the second place；

Figure 12 is the plan of structure shown in Figure 11；

Figure 13 is the stereogram of partial shell in Fig. 1 and hanging hook assembly, and wherein hook member opposite joints turn over 90 degree；

Figure 14 is the part explosive view of the hanging hook assembly in Fig. 8；

Figure 15 is the stereogram of bottom plate in Fig. 1 and angle adjusting mechanism；

Figure 16 is the stereogram of another angle of bottom plate in Fig. 1 and angle adjusting mechanism；

Figure 17 is the explosive view of structure shown in Figure 15；

Figure 18 is the explosive view of another angle of structure shown in Figure 15

Figure 19 is stereogram when electric circular saw in Fig. 1 is adapted to guide rail；

Figure 20 is the stereogram of bottom plate in Figure 19 and guider；

Figure 21 to Figure 25 is the plan of the electric circular saw in Fig. 1, and they show that guider is moved from the second binding site Move to the process of the first binding site；

Figure 26 is the stereogram of bottom plate in Fig. 1, shield and depth adjusting mechanism；

Figure 27 is the plan of structure shown in Figure 26；

Figure 28 is the part explosive view of structure shown in Figure 26；

Figure 29 is the part explosive view of another angle of structure shown in Figure 26；

Figure 30 shows the swing produced by depth support when depth support is only oriented to by slide bar；

Figure 31 shows the swing produced by depth support when depth support is oriented to by lug boss；

Figure 32 is the plan of working accessory in Fig. 1 and fastener；

Figure 33 is the stereogram of the fastener in Figure 32；

Figure 34 is the explosive view of the fastener in Figure 33；

Figure 35 is the explosive view of another angle of the fastener in Figure 33.

Embodiment

Power tool as shown in Figure 1 to Figure 3 is a kind of power tool of hand-held, specially a kind of electronic cutting work Tool, the cutting tool is further a kind of electric saw, and more specifically, the electric saw can be electric circular saw 100.

As depicted in figs. 1 and 2, the electric circular saw 100 includes：Tool host 10, bottom plate 20, angle adjusting mechanism 30, depth Governor motion 40, guider 50 and hanging hook assembly 60.

The technical solution of the utility model for convenience of explanation, also define upside as shown in Figure 1, downside, front side, after Side, left side and right side.

As shown in Figure 1 to Figure 3, tool host 10 includes：Housing 11, motor 12, fan 13, working accessory 14 and driving Axle 15.

Housing 11 is used to accommodate the structures such as motor 12, fan 13 and drive shaft 15.Motor 12 as electric circular saw 100 original Motivation, it is used to export power and drives working accessory 14, and motor 12 includes the motor shaft that can be rotated with electrical axis 101 for axle 121.Fan 13 can be with the synchronous axial system of motor shaft 121, so as to be radiated to structures such as motors 12.Working accessory 14 is used as electricity circle The functor of saw 100, it is used for implementation tool function, and working accessory 14 can be the cutting member for realizing cutting function, right For electric circular saw 100, working accessory 14 is specifically as follows the saw blade of circle.Drive shaft 15 as electric circular saw 100 output, It is used to export power, and drive shaft 15 is arranged on to drive working accessory 14 between motor 12 and working accessory 14, specifically, Drive shaft 15 is used to drive saw blade to rotate around the pivot center 102 through saw blade itself.It will be appreciated by those skilled in the art that , for electric circular saw 100, drive shaft 15 can be an independent axle being driven by motor 12, can also directly by The motor shaft 121 of motor 12 is formed.

Specifically, housing 11 can include：Electric machine casing portion 111, main handle portion 112, secondary handle portion 113, connecting portion 114 and shield 115.Wherein, electric machine casing portion 111 is used to accommodate motor 12, and electric machine casing portion 111 is also included along around motor The circular portion 111a of the circumferencial direction wound motor 12 of axis 101 and it is arranged on around the one end of portion 111a away from working accessory 14 End 111b.Main handle portion 112 and secondary handle portion 113 are respectively used to grip for two hands of user, to realize hands grasping The purpose of the electric circular saw 100, enables a user to more stable operation electric circular saw 100.Connecting portion 114 is arranged on main handle Between portion 112 and secondary handle portion 113, it is used to connect main handle portion 112 and secondary handle portion 113.Shield 115 is used to enter saw blade Row part is surrounded, so as to avoid saw blade from the course of the work getting rid of scrap to user.

As shown in Figures 1 to 4, fan 13 is located in electric machine casing portion 111, and fan 13 is additionally arranged at the remote of motor 12 The side of working accessory 14, fan 13 is specially centrifugal fan.Housing 11 is also formed with air flow inlet 116 and air stream outlet 117, Air flow inlet 116 connects the inside and outside of housing 11, and air stream outlet 117 connects the inside and outside of housing 11.Wherein, air flow inlet 116 is in shell Position on body 11 can be corresponding with the electronic component such as the circuit board in housing 11, and it is remote that air stream outlet 117 is arranged on motor 12 The side of working accessory 14, and air stream outlet 117 is additionally arranged at one end around portion 111a close to end.So, when motor 12 When driving the rotation of fan 13, fan 13 can extract the air-flow at air flow inlet 116 and so that air-flow is flowing through circuit board and electricity Got rid of after machine 12 to air stream outlet 117, so as to reach the effect radiated to motor 12 and circuit board.

As shown in Figures 1 to 6, specifically, motor 12 is external rotor electric machine, and it includes：Stator 122, rotor 123 and with Upper described motor shaft 121.What stator 122 was fixed is arranged in housing 11, and motor shaft 121 is spindle rotationally arranged in housing 11 Interior, rotor 123 around stator 122 and constitutes synchronous axial system with motor shaft 121, and rotor 123 is also set up close to the side of fan 13 There is the passage 123a for causing air-flow to pass through.So, after motor 12 starts, air-flow enters from the front side of motor 12, stream Through stator 122, then from the passage 123a outflows of the rear side of motor 12, air stream outlet 117 is finally flowed to.But, because turning Son 123 is spindle rotationally arranged in housing 11, therefore there is certain gap between the inwall of rotor 123 and housing 11, enters one For step, the gap refers to rotor 123 and the gap 124 having between portion 111a inwall.So, from motor 12 Rear side outflow air-flow be likely to by rotor 123 and around portion 111a inwall between gap 124 return from the front to the back Stream, so as to cause the temperature of motor 12 to raise, and then is unfavorable for the radiating of motor 12.Therefore, electric circular saw 100 also includes being used for backstop Air-flow is by motor 12 close to the stop part 125 of a lateral opposite side backflow of fan 13, and in other words stop part 125 is for backstop The air-flow flowed out from the rear side of motor 12 from gap 124 of the rear side by rotor 123 and between portion 111a of motor 12 to The front side backflow of motor 12, so as to improve the radiating effect to motor 12.

What stop part 125 was fixed is arranged in housing 11, furthermore, and stop part 125 constitutes fixed connect with stator 122 Connect.As shown in Figure 3 and Figure 4, stop part 125 includes being arranged on the backstop at rotor 123 and the gap 124 surrounding between portion 111a Portion 125a.In addition, as shown in Figure 3 and Figure 5, throwing of the stop part 125 in the plane of a pivot center perpendicular to rotor 123 Shadow is at least partially disposed at outside projection of the rotor 123 in the plane.Wherein, the electricity of the pivot center of rotor 123 and motor 12 Arbor line 101 is overlapped.

Specifically, stop part 125 also includes：First extension 125b and the second extension 125c.First extension 125b extends from stopper section 125a radially toward the direction away from motor 12, and the first extension 125b is radially extending at this Outside gap 124 to rotor 123 and between portion 111a.Second extension 125c from stopper section 125a radially toward by The direction extension of nearly motor 12, and the second extension 125c is radially extending to rotor 123 and between portion 111a at this Outside gap 124.In other words, the first extension 125b from stopper section 125a outer wall stretches out, the second extension 125c Extended internally from stopper section 125a inwall.In addition, directions of the stopper section 125a along the pivot center parallel to rotor 123 is prolonged Stretch, length of the stopper section 125a on the direction of the pivot center parallel to rotor 123 is more than the first extension 125b radially On length, furthermore, length of the stopper section 125a on the direction of the pivot center parallel to rotor 123 is more than 10mm, so that stopper section 125a length long enough, and then more preferable windproof effect can be reached.It should be noted that Here radial direction refers to the radial direction of the circumferencial direction centered on the pivot center of rotor 123.

Turn as shown in fig. 7, stopper section 125a and the full-size of gap 126 diametrically between portion 111a are less than Son 123 and the minimum dimension of gap 124 diametrically between portion 111a, furthermore, stopper section 125a is with surrounding The full-size of gap 126 diametrically between portion 111a is more than 0mm and is less than or equal to 2mm.It should be noted that footpath here To the radial direction for referring to the circumferencial direction centered on the pivot center of rotor 123.

As illustrated in figures 1 and 8, electric circular saw 100 is hand held electric tool, and user is when operating electric circular saw 100, particularly When user carries out operation in high-altitude, it is frequently necessary to lead to electric circular saw 100 after operation a period of time is carried out using electric circular saw 100 Hanging hook assembly 60 is crossed to hang up to be further continued for using later.Hanging hook assembly 60 can specifically include：Connector 61 and hook Part 62, wherein, connector 61 is used to cause hanging hook assembly 60 to be connected to housing 11, and hook member 62 is used to hang electric circular saw 100 Hang up.

Specifically, as shown in Fig. 8 to Figure 10, hanging hook assembly 60 is arranged on the connecting portion 114 of housing 11, and positioned at master Between handle portion 112 and secondary handle portion 113.Specifically, hook member 62 includes hook portion 621 and shank 622, wherein, shank 622 are constituted with connector 61 and are connected with first axle 103 for the rotation of axle, and first axle 103 also is normal to the rotary shaft of saw blade Line 102.

As shown in Figure 8 and Figure 11, the relative housing 11 of the energy of connector 61 is moved between the first position and the second position, and Connector 61 is moved to behind the second place by first position, and connector 61 generates rotation with respect to its own and connector 61 is relative The rotation axis 104 for itself producing rotation also generates displacement, and connector 61 produces the rotation axis 104 of rotation with respect to itself Perpendicular to first axle 103, the pivot center 102 of the rotation axis 104 of connector 61 also parallel with saw blade.

Specifically, housing 11 is formed with a deep-slotted chip breaker 114a, and deep-slotted chip breaker 114a is arranged on connecting portion 114, the arc The grooves of shape groove 114a further for a circular arc.Connector 61 also includes move portion 611, and move portion 611 can be in deep-slotted chip breaker Arcuately groove 114a bearing of trend movement in 114a, move portion 611 is moved to the two of deep-slotted chip breaker 114a in deep-slotted chip breaker 114a Connector 61 is caused to be located at first position and the second place respectively during end.

As shown in Figure 8 and Figure 9, when connector 61 is located at first position, the hook portion 621 of hook member 62 now is basic Extend downwardly, so that when user's both hands grip main handle portion 112 and secondary handle portion 113 respectively, hook portion 621 will not be to user Hand cause interference, and then facilitate the operation of user.In fact, housing 11 can also be formed one have it is other shapes of with The groove moved for move portion 611, for example, say that the groove enables to move portion 611 first to occur rotation and then occur again linearly Movement, so, still enable to connector 61 after the second place is moved to by first position, connector 61 with respect to its from Body generates rotation and connector 61 also generates displacement with respect to the rotation axis 104 that itself produces rotation, therefore, such reality Apply mode and in fact fall within the scope that the utility model is protected.

As described above, deep-slotted chip breaker 114a is the groove of a circular arc, the cell wall institute of deep-slotted chip breaker 114a circular arc is right The central axis answered is in first axle 103.Therefrom, it may be appreciated that, connector 61 arcuately groove 114a bearing of trend by First position move to the process of the second place it is also assumed that be connector 61 with respect to housing 11 with one with connector 61 from The misaligned second axis 105 of shaft axis 104 be axle revolution, the second axis 105 also with the no longer same plane of first axle 103 It is interior, and second axis 105 is also perpendicularly to first axle 103.It should be noted that in the present embodiment, when connector 61 is rotated Second axis 105 that is to say deep-slotted chip breaker 114a circular arc cell wall corresponding to center line.As long as in fact, connector 61 Constitute what can be connected with one with the misaligned second axis 105 of the rotation axis 104 of connector 61 for the rotation of axle with housing 11 Scheme also belongs to the scope that the utility model is protected.

As shown in figs.10 and 14, deep-slotted chip breaker 114a runs through along the direction of the rotation axis 104 parallel to connector 61 Connecting portion 114, connector 61 also includes constituting the blocking portion 612 being detachably connected with move portion 611.Blocking portion 612 is used to hinder Only move portion 611 departs from deep-slotted chip breaker 114a.So, can be first certainly mobile by blocking portion 612 when user installation hanging hook assembly 60 Disassembled in portion 611, then cause move portion 611 to pass through deep-slotted chip breaker 114a, then blocking portion 612 is attached to move portion 611, So as to which hanging hook assembly 60 is attached into housing 11.

The use process of hanging hook assembly 60 is introduced in detail below, and as shown in Figure 8 and Figure 9, connector 61 now is located at arc First position in shape groove 114a, at this moment user the electric circular saw 100 can be used to carry out sawing operation, and hook member 62 now Interference is not resulted in the both hands for gripping main handle portion 112 and secondary handle portion 113 respectively of user, facilitates the operation of user.And When user's pause needs to hang up the electric circular saw 100 using the electric circular saw 100, user can operate the hanging hook assembly 60 So that the arcuately groove 114a of connector 61 bearing of trend moves to the second place by first position.Specifically such as Figure 11 and Figure 12 institutes Show, connector 61 now has moved to the second place, hook member 62 at this moment also substantially have rotated 90 degree with respect to housing 11.Such as Shown in Figure 11 and Figure 13, at this moment user can continue to operate the hanging hook assembly 60 so that the opposite joints 61 of hook member 62 are with first Axis 103 is that axle is rotated and is substantially rotated by 90 °.As shown in figure 13, now hook member 62 can cause with respect to the position of housing 11 The respective outer side edges such as hook member 62 and the crossbeam in working environment are so that the electric circular saw 100 to be hung up.

As shown in Fig. 1, Figure 15 and Figure 16, bottom plate 20 is constituted with housing 11 to be connected with a pivot axis 106 for the rotation of axle Connect.Pivot center 102 of the pivot axis 106 perpendicular to saw blade.So, when the opposed bottom 20 of housing 11 is with pivot axis 106 When being rotated for axle, the saw blade run-off the straight of electric circular saw 100 is enabled to, so that electric circular saw 100 realizes inclined cut.

As shown in Fig. 1, Figure 15 to Figure 18, angle adjusting mechanism 30 is used for the opposed bottom 20 of guide housings 11 with pivot axis 106 by axle rotation and being capable of the angle that rotates of adjustment housings 11.Angle adjusting mechanism 30 includes：Angle scale 31, adaptor 32nd, sliding part 33, locating part 34 and operating element 35.

Angle scale 31 is fixedly installed to bottom plate 20, furthermore, and angle scale 31 can be integrally formed with bottom plate 20, angle Arc groove 311 is formed with disk 31.The one end of adaptor 32 is connected with housing 11, other end connection sliding part 33, and sliding part 33 is wrapped Include the sliding part 331 being slidably disposed in arc groove 311.One end that adaptor 32 is connected with housing 11 also with angle scale 31 Constitute and connected with pivot axis 106 for the rotation of axle so that sliding part 33 and housing 11 constitute can with housing 11 in the lump with Pivot axis 106 is the connection that axle is rotated.So, when housing 11 drives sliding part 33 to be rotated in the lump with pivot axis 106 for axle When, sliding part 331 can be slided in arc groove 311, and the distance that sliding part 331 is slided in arc groove 311 reflects shell The angle that body 11 is rotated, that is to say the angle for reflecting the inclined cut of electric circular saw 100.Locating part 34 is used for limit slippage portion 331 are directed away from bottom plate 20 in arc groove 311 slides into predeterminated position.For example when sliding part 331 from arc groove 311 bottom of close to When the angle that one end of plate 20 slides into the inclined cut for causing electric circular saw 100 is 45 degree of position, now locating part 34 can Sliding part 331 is limited in into the position sliding part 331 is slided from being further continued for being directed away from the direction of bottom plate 20.The electricity Annular saw 100 also includes coordinating with the location structure 312 of the position of positioning limit part 34, the number of location structure 312 with locating part 34 It can be multiple, so, when the location structure 312 of locating part 34 and diverse location coordinates, enable to sliding part 33 to slide To different predeterminated positions.Operating element 35 is used for for user's operation, and when user operates the operating element 35, operating element 35 can also drive locating part 34 to depart from the cooperation with location structure 312.

Specifically, locating part 34 is arranged on angle scale 31 close to the side of housing 11, locating part 34 and the structure of angle scale 31 Into that can be connected using one parallel to the rotation of axis as the axle of pivot axis 106, locating part 34 also includes position with arc groove 311 Corresponding limiting section 341, sliding part 33 is spacing by limiting section 341.Operating element 35 is arranged on angle scale 31 away from spacing It is formed with through hole 313 on the opposite side of part 34, angle scale 31, operating element 35 and locating part 34 are by through the through hole 313 Screw 36 is connected.Operating element 35 is specifically as follows the knob that synchronous axial system is constituted with locating part 34, so, is revolved when user operates During button, locating part 34 can be with knob.Location structure 312 is directed away from the direction of locating part 34 to be arranged on angle scale 31 The groove of depression, locating part 34, which is formed with, can be embedded in the projection 342 of groove.It should be noted that those skilled in the art can be with Understand, the position of groove and projection 342 can also be exchanged.

Operating element 35 also constitutes the cunning for the axis direction that can be rotated along the relative angle scale 31 of locating part 34 with angle scale 31 Dynamic connection, angle adjusting mechanism 30 also includes the bias piece 37 being arranged between operating element 35 and angle scale 31 of bias, partially Casting die 37 can produce the direction movement for causing operating element 35 to be directed away from angle scale 31, so that the projection on locating part 34 342 move when turning to and being alignd with location structure 312 towards with the position that location structure 312 coordinates.Also enclosed on angle scale 31 Through hole 313 is provided with graduation mark 314, user can be turned at predetermined angle with operation knob, so as to realize electric circular saw 100 The quick positioning of different cutting angles.

Furthermore, angle adjusting mechanism 30 also includes locking piece 38, and locking piece 38 is used for lock slide 33 in circle Position in arc groove 311.

It is described below and how carries out inclined cut using the electric circular saw 100, such as so that 45 degree are cut as an example：First, user Pressing operation element 35 causes operating element 35 to overcome the bias of bias piece 37, so that locating part 34 departs from and a location structure 312 cooperation, at this moment again rotary operation elements 35 and cause operating element 35 turn at 45 degree of positions, locating part 34 at this moment Rotated also with operating element 35 and turn to projection 342 and alignd with another location structure 312, then user unclamps operating element 35, at this moment in the presence of bias piece 37, locating part 34 is moved towards at the position coordinated with location structure 312, then user Again so that sliding part 33 is slid into arc groove 311 at limiting section 341, end user passes through the lock slide 33 of locking piece 38 Position in arc groove 311, so as to realize the quick positioning of 45 degree of cuttings of electric circular saw 100.

As shown in Fig. 3, Figure 19 and Figure 20, bottom plate 20 is formed with the base plate plane 21 for being contacted with workpiece, and the bottom plate is put down Pivot center 102 of the face 21 also parallel with saw blade.Guider 50 is used to be oriented to the electric circular saw 100 along straight cuts workpiece, leads Include to device 50：First guide 51, the second guide 52 and engaging member 53.Wherein, the first guide 51 include be used for The guide surface 511 of the contact aside of workpiece, guide surface 511 extends along first straight line 107；Second guide 52 is formed with use In the guiding locking portion 521 coordinated with a guide rail 201, it is oriented to locking portion 521 and prolongs along the direction parallel with first straight line 107 Stretch.As shown in Figure 19 and Figure 25, engaging member 53 can cause guider 50 to be bound to the first binding site of bottom plate 20.Such as Figure 21 Shown, engaging member 53 can also cause guider 50 to be bound to the second binding site of bottom plate 20.User can be according to actual need Want selectable so that guider 50 is bound to the first binding site or the second binding site.It is located at the in guider 50 During one binding site, the first guide 51 is located at the upside of base plate plane 21, and the second guide 52 is located under base plate plane 21 Side；When guider 50 is located at the second binding site, the first guide 51 is located at the downside of base plate plane 21, the second guide 52 are located at the upside of base plate plane 21.

So, when guider 50 is located at the first binding site, the first guide 51 is located at the upside of base plate plane 21, Second guide 52 is located at the downside of base plate plane 21, and it is remote that the guiding locking portion 521 of the second guide 52 is also located at motor 12 The side of saw blade, so that being oriented to locking portion 521 can coordinate with guide rail 201, and then at this moment electric circular saw 100 can lead by second It is oriented to realize straight cuts to part 52.When guider 50 is located at the second binding site, the first guide 51 is located at The downside of base plate plane 21, the second guide 52 is located at the upside of base plate plane 21, the guide surface of the first guide 51 511 In side of the cutting member away from motor 12 so that guide surface 511 can coordinate with the side of workpiece, and then electric circular saw 100 this When can be oriented to by the first guide 51 to realize straight cuts.

As shown in Fig. 3, Figure 19 to Figure 25, when guider 50 is located at the first binding site, the first guide 51 and the Two guides 52 are respectively positioned on side of the motor 12 away from saw blade, and when guider 50 is located at the second binding site, first is oriented to The guide 52 of part 51 and second is respectively positioned on side of the saw blade away from motor 12.Wherein, in guider 50 by the second binding site When being moved to the first binding site, the first guide 51 is located at the upside of base plate plane 21, and at this moment the first guide 51 is in bottom plate The position of the upside of plane 21 is easy to produce interference with motor 12, therefore, in the present case, also causing the first guide 51 and second Guide 52 is constituted to be connected with the 3rd axis 108 for the rotation of axle.Specifically, the first guide 51 and the structure of the second guide 52 The 3rd axis 108 into rotation connection is parallel to the direction of first straight line 107.So, when guider 50 is by the second binding site When being moved to the first binding site, at this moment the first guide 51 can turn to motor 12 away from saw blade with respect to the second guide 52 Side, so as to avoid the position of the location of first guide 51 and motor 12 from producing interference.

In addition, in other embodiments, the first guide 51 can also be constituted with the second guide 52 and is slidably connected, and it The relative direction slided perpendicular to the direction of first straight line 107.So, when guider 50 by the second binding site is moved to During one binding site, at this moment the first guide 51 can slide into side of the motor 12 away from saw blade with respect to the second guide 52, So as to avoid the position of the location of first guide 51 and motor 12 from producing interference.

As shown in figure 20, engaging member 53, which is specifically as follows, can be bound to the chi of bottom plate 20.It can also be set on the surface of chi There is the groove 531 for indicating the size of the cutting workpiece of electric circular saw 100.

The process that guider 50 is moved to the first binding site from the second binding site is introduced in detail below：Such as Figure 21 institutes Show, guider 50 now is located at the second binding site, and at this moment guide surface 511 is located at the downside of base plate plane 21, is oriented to Plane 511 can be with workpiece contact aside, then, as shown in Figure 22 to Figure 23, user be directed to device 50 from second combine Position disassembles and overturn, subsequently, as shown in figure 23 and figure 24, and user causes the first guide 51 relative second to lead Certain angle is rotated to part 52, preferably 90 degree here, finally, as shown in figure 25, user is directed to device 50 and is bound to again First binding site.

As shown in Fig. 3 and Figure 26, it is axle that bottom plate 20, which supports housing 11 and also constituted with housing 11 with first rotation 109, Rotation connection, pivot center 102 of the first rotation 109 also parallel with saw blade.Depth adjusting mechanism 40 is used to be oriented to And the angle that the opposed bottom 20 of adjustment housings 11 is rotated with first rotation 109 by axle.

As shown in Figure 26 to Figure 29, depth adjusting mechanism 40 includes：Depth support 41 and slide bar 42.Depth support 41 and bottom Plate 20 is constituted to be connected with the second rotation axis 110 for the rotation of axle, pivot center of second rotation axis 110 parallel to saw blade 102, second rotation axis 110 is parallel and misaligned also with first rotation 109.Depth support 41 is formed with circular hole 411, circular hole 411 is along the direction depth of penetration support 41 parallel to first rotation 109.Slide bar 42 constitutes solid with housing 11 Connect calmly, and slide bar 42 also extends through circular hole 411 and coordinated with the gap of circular hole 411.So, when 20 turns of 11 opposed bottom of housing When dynamic, slide bar 42 can be slided in circular hole 411 along the bearing of trend of circular hole 411 and slide bar 42 will not all the time with circular hole 411 hole wall contact.Wherein, although slide bar 42 can play certain guide effect when being slided in circular hole 411, this meeting So that the swing of depth support 41 is larger, so as to cause the scale indicated by the pointer for indicating graduation on depth support 41 There is deviation.In addition, it is known that manufacture electric circular saw 100 when, the opposed bottom 20 of depth support 41 rotate the point of rotation 412 Position it is possible that error, so, if if being oriented to by slide bar 42, because housing 11 is at relative bottom Slide bar 42 is, as housing 11 is moved in the lump and slide bar 42 is relatively near apart from the point of rotation 412, therefore, to work as the point of rotation when plate 20 is rotated When error occurs in 412 position, depth support 41 can be caused to produce a larger amplitude of oscillation.

And in the present case, housing 11 is also formed with relative between bottom plate 20 and housing 11 for guiding at shield 115 The guide rail 118 of rotation, the guide rail 118 is specially the groove of the arc formed on shield 115, and the groove of the arc is set In the side of the close motor 12 of shield 115.Corresponding, depth support 41 is formed or is fixedly connected with can be along guide rail The guide frame 413 that 118 guide track is slided, specifically, lug boss of the guide frame 413 for energy embedded groove, lug boss Depth support 41 is formed at close to the side of shield 115.The cell wall of the groove of arc is the guiding wall 118a arcuately extended, convex The portion of rising includes can be when it be axle rotation that the opposed bottom 20 of housing 11 is with first rotation 109 along the extension side for being oriented to wall 118a Have to mobile contact wall 413a, on contact wall 413a all the time with being oriented to the contact point that wall 118a is contacted.More For body, the lug boss is substantially in kidney-shaped, one in its two relative waist contacted all the time with a cell wall of groove so as to To be considered foregoing contact wall 413a, another waist can form 0.5mm interval with another cell wall of groove, this When each on the waist contacted all the time with groove of lug boss point can also be considered foregoing contact point.Wherein, Lug boss is integrally formed with depth support 41, therefore, the contact point of lug boss and the rotation of the opposed bottom 20 of depth support 41 rotation The distance between turning point 412 is fixed.So, the rotation to the opposed bottom 20 of housing 11 is realized by slip of the lug boss in groove It is oriented to, the swing of depth support 41 can be reduced, and the error that the point of rotation 412 occurs in manufacture is to depth support 41 The amplitude of oscillation influence of produced swing is smaller.

Furthermore, lug boss is arranged on the one end of depth support 41 away from the point of rotation 412, and contact point and depth branch The distance between point of rotation 412 that the opposed bottom 20 of frame 41 is rotated is more than or equal to 50mm and less than or equal to 150mm.So, can be with Influence of the error that further the reduction point of rotation 412 occurs in manufacture to the swing produced by depth support 41.In addition, leading It is the arc that one section of curvature changes to the guide track of track 118.

When depth support 41 is oriented to only by the slide bar 42 being arranged in circular hole 411, as shown in figure 30, such as The fruit point of rotation 412 produces 0.5mm foozle, then depth support 41 can produce a larger amplitude of oscillation, can be with by Figure 30 Find out, the amplitude of oscillation angle that depth support 41 is produced is 1.04 degree.And when depth support 41 is convex by what is set on depth support 41 When the portion of rising is oriented to, as shown in figure 31, if the point of rotation 412 produces 0.5mm foozle, then depth support 41 can be produced A raw less amplitude of oscillation, as seen from Figure 31, the amplitude of oscillation angle that depth support 41 is produced are 0.32 degree.It follows that convex The setting in the portion of rising can eliminate the swing produced by the depth support 41 that foozle is brought, so as to improve the essence of depth instruction Degree, and without cost is increased, do not increase the complexity of structure yet.

As shown in Fig. 2 and Figure 32, electric circular saw 100 also includes the fastening for being used to being attached to working accessory 14 into tool host 10 Device 70, wherein, working accessory 14 is formed with a mounting hole 141.Specifically, the working accessory 14 is fitted for foregoing For the saw blade of electric circular saw 100, saw blade is run through in pivot center 102 direction of the mounting hole 141 along saw blade.

As shown in Figure 32 to Figure 35, fastener 70 includes：Fastener 71, holder 72, operating parts 73, rolling member 741, The biased element 76 of bridgeware 75 and first.

Wherein, fastener 71 includes fastening part 711, and fastening part 711 passes through mounting hole 141, and fastening part 711 is also protruded into drive Moving axis 15 is simultaneously connected with the composition rotation of drive shaft 15, and fastening part 711 can also drive whole fastening when relative drive shaft 15 is rotated Device 70 is close or away from tool host 10.Holder 72 is rotatably attached to fastener 71, and holder 72 is also formed with For the clamping face 721 contacted with working accessory 14.Operating parts 73 is used for for user's operation, and operating parts 73 is constituted with fastener 71 Synchronous axial system.Rolling member 741 is arranged between holder 72 and operating parts 73, and rolling member 741 being capable of opposing gripping members 72 and behaviour Workpiece 73 is rolled.Bridgeware 75 is also disposed between holder 72 and operating parts 73, and bridgeware 75, which also has, can make holder 72 The first position state of synchronous axial system is constituted with operating parts 73 and holder 72 and operating parts 73 can be made to constitute the of relative rotation Two location status.First biased element 76 applies to bridgeware 75 makes bridgeware 75 towards the bias of first position state motion Power.

So, when user needs installation or dismantlement work annex 14, at this moment bridgeware 75 can be caused to overcome first The bias of biased element 76 and positioned at holder 72 and operating parts 73 can be made to constitute the second place state relatively rotated, Ran Houyong Family operates the operating parts 73, so as to drive fastener 71 towards the position for causing the close or remote working accessory 14 of clamping face 721 Put motion.At this moment relatively rotated because holder 72 is constituted with operating parts 73, so that user is applied to the power on operating parts 73 Need to overcome between the frictional force between fastener 71 and drive shaft 15 and rolling member 741 and holder 72 or operating parts 73 Force of rolling friction, and because force of rolling friction is smaller, therefore the power that user is applied on operating parts 73 is mainly used in overcoming fastening Frictional force between part 71 and drive shaft 15, so that user can the installation of more labour-saving or dismantlement work annex 14.

Specifically, the surface of fastening part 711 is provided with external screw thread, so, and when fastening part 711 is rotated, it being capable of phase Drive shaft 15 is moved on the axis direction that it is rotated.Fastener 71 also extends through the flat position hole 732a set on operating parts 73, Fastener 71 is provided with the flat position portion 712 for coordinating with flat position hole 732a, passes through flat position portion 712 and flat position hole 732a cooperation So that operating parts 73 constitutes synchronous axial system with fastener 71.

The number of bridgeware 75 is 2, and two bridgewares 75 are symmetrically arranged on one of holder 72 away from clamping face 721 Side.Specifically, one end of bridgeware 75 is rotatably connected to side of the holder 72 away from clamping face 721, the other end and connected Connect the first biased element 76.The axis that the opposing gripping members 72 of bridgeware 75 are rotated is also parallel with 71 turns of 72 opposing fastener inserts of holder Dynamic axis, and can turn to first position state and second place state when the opposing gripping members 72 of bridgeware 75 are rotated.Folder Side of the gripping member 72 away from clamping face 721 is provided with holding tank 722, and the first biased element 76 is specially to be arranged on holding tank 722 Interior helical spring, one end of helical spring supports the bottom land of holding tank 722, the other end and supports bridgeware 75.The He of operating parts 73 Bridgeware 75 is respectively formed with when they cooperate so that holder 72 constitutes the first biography of synchronous axial system with operating parts 73 Dynamic portion 731a and the second driving section 751.Specifically, operating parts 73 includes gear ring portion 731 and end cap portions 732, gear ring portion 731 Inner circumferential is provided with internal tooth, and the internal tooth is the first driving section 731a.Corresponding, bridgeware 75 is also formed with can be with ring gear portion The external tooth of 731 internal tooth engagement, the external tooth is the second driving section 751.

Operating parts 73 is also formed with for driving what bridgeware 75 overcame the first biased element 76 to be biased towards the second place The drive division of state motion.Specifically, operating parts 73 also constitutes the axis direction of the rotation along fastener 71 with fastener 71 On be slidably connected, drive division is the first inclined-plane 732b for being formed at end cap portions 732 at the side of holder 72.Correspondence , bridgeware 75 is formed with the second inclined-plane 752 that can coordinate with the first inclined-plane 732b.So, when operating parts 73 is towards close to folder When the direction of gripping member 72 is slided, the first inclined-plane 732b drives the second inclined-plane 752 to make bridgeware 75 towards second place state motion.

In addition, rolling member 741 is specifically as follows the roller bolt in rolling bearing 74, rolling bearing 74 is arranged on holder 72 Between operating parts 73.The second biased element 77, the second biased element are additionally provided between operating parts 73 and rolling bearing 74 77 make the biasing force that it is directed away from the slip in the direction of holder 72 to the application of operating parts 73.

When working accessory 14, which is in, is locked by fastener 70 to drive shaft 15, the second biased element 77 bias behaviour Workpiece 73 simultaneously causes operating parts 73 to be in the position away from holder 72, and the first biased element 76 bias bridgeware 75 simultaneously to turn Change part 75 and be in first position state, at this moment the first driving section 731a cooperates with the second driving section 751, so that holder 72 Synchronous axial system is constituted with operating parts 73, if at this moment the direct rotating operation part 73 of user carrys out dismantlement work annex 14, then User, which applies, not only to be needed to overcome the frictional force between fastener 71 and drive shaft 15 to the revolving force of operating parts 73 but also wants Overcome the stiction between holder 72 and working accessory 14, and the stiction is larger, therefore user's rotary operating member 73 Can be relatively elaborate.And in the present case, when user needs dismantlement work annex 14, in fact, user can first pressing operation part 73, at this moment by the first inclined-plane 732b and the second inclined-plane 752 cooperation bridgeware 75 can be driven to turn to second place state, So as to which the first driving section 731a and the second driving section 751 depart from, so operating parts 73 can opposing gripping members 72 rotate, Ran Houyong Family rotary operating member 73 again, at this moment user apply to the revolving force of operating parts 73 only need to overcome fastener 71 and drive shaft 15 it Between frictional force and rolling member 741 and holder 72 or operating parts 73 between force of rolling friction, and because force of rolling friction It is smaller, therefore the power that user is applied on operating parts 73 is mainly used in overcoming the frictional force between fastener 71 and drive shaft 15, Enable a user to more labour-saving and realize installation or dismantlement work annex 14.

In fact, the fastener 70 not only can be only used for saw blade being attached to saw class instrument, it can be also used for beating Grinding is attached to angle mill, is not limited thereto certainly.

If it should be noted that the partial hole in this case is to run through some in a certain direction without strictly speaking bright its Part, then the hole is also likely to be to be replaced by groove.In other words, the part groove in this case can also be replaced with hole, part Hole can also be replaced with groove.

General principle of the present utility model, principal character and advantage has been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation The technical scheme obtained, all falls within protection domain of the present utility model.

Claims (10)

1. a kind of electric tool, including：

Functor, for implementation tool function；

Motor, for driving the functor；

Housing, including for accommodating the electric machine casing portion of the motor；

Fan, is arranged on the side of the remote functor of the motor；

The housing is formed with air flow inlet and air stream outlet, and the fan can extract the air-flow at the air flow inlet when rotating And air-flow is got rid of after the motor is flowed through to the air stream outlet；The electric machine casing portion includes surrounding around the motor Portion and the end for being arranged on described circular portion one end；

It is characterized in that：

The motor includes：

Stator, relatively described housing is fixed；

Motor shaft, is spindle rotationally arranged in the housing；

Rotor, synchronous axial system is constituted around the stator and with the motor shaft；

Wherein, the electric tool also includes：

Stop part, includes the stopper section for the gap location being arranged between the rotor and the circular portion；

Projection of the stop part in the plane of a pivot center perpendicular to the rotor is at least partially disposed at described turn Outside projection of the son in the plane.

2. electric tool according to claim 1, it is characterised in that：

The stop part is constituted with the stator and is fixedly connected.

3. electric tool according to claim 1, it is characterised in that：

The stopper section is around the rotor；

The stop part also includes：

First extension, extends and radially extending extremely at this from the stopper section radially toward the direction away from the motor Outside gap between the rotor and the circular portion.

4. electric tool according to claim 3, it is characterised in that：

The stop part also includes：

Second extension, extends and radially extending extremely at this from the stopper section radially toward close to the direction of the motor Outside gap between the rotor and the circular portion.

5. electric tool according to claim 3, it is characterised in that：

Direction of the stopper section along the pivot center parallel to the rotor extends, and the stopper section is parallel to the rotor Pivot center direction on length be more than the length of first extension diametrically.

6. electric tool according to claim 1, it is characterised in that：

The full-size of gap diametrically between the stopper section and the circular portion is less than the rotor and surround with described The minimum dimension of gap diametrically between portion.

7. electric tool according to claim 1, it is characterised in that：

The full-size of gap diametrically between the stopper section and the circular portion is more than 0mm and is less than or equal to 2mm.

8. electric tool according to claim 1, it is characterised in that：

The fan is centrifugal fan.

9. electric tool according to claim 1, it is characterised in that：

The rotor is also formed with：

Passage, positioned at the stator close to the side of the fan.

10. a kind of electric saw, including：

Cutting member, for cutting workpiece；

Motor, for driving the cutting member；

Housing, including for accommodating the electric machine casing portion of the motor；

Fan, is arranged on the side of the remote cutting member of the motor；

The housing is formed with air flow inlet and air stream outlet, and the fan can extract the air-flow at the air flow inlet when rotating And air-flow is got rid of after the motor is flowed through to the air stream outlet；The electric machine casing portion includes surrounding around the motor Portion and the end for being arranged on described circular portion one end；

It is characterized in that：

The motor includes：

Stator, relatively described housing is fixed；

Motor shaft, is spindle rotationally arranged in the housing；

Rotor, synchronous axial system is constituted around the stator and with the motor shaft；

Wherein, the electric saw also includes：Be at least partially disposed in the gap location between the rotor and the circular portion for The stop part that backstop air-flow is flowed back by the motor close to a lateral opposite side of the fan.