CN207026606U - Portable cutter - Google Patents

Abstract

The utility model provides a kind of portable cutter, including：Housing；The motor being contained in housing；The bottom plate being movably connected on housing；For cover saw blade determine shield and relative to determine shield motion dynamic shield；Switch module include electrically connect with motor microswitch, trigger microswitch switch lever, be capable of the lock piece of locking switch bar and operated by lock piece and can prevent move shield stop part, lock piece has the latched position for locking dynamic shield and switch lever simultaneously while the off-position of the dynamic shield of release and switch lever, and the centre position of the dynamic shield of release but the centre position of locking switch bar or release-push bar but the dynamic shield of locking.By the lock piece for setting controllable switch bar and dynamic shield, operator is facilitated to operate, and the lock piece has latched position, centre position and off-position, understand maloperation portable cutter without having to worry about operator, be arranged such and greatly improve user's processing safety.

Description

Portable cutter

Technical field

It the utility model is related to a kind of portable cutter.

Background technology

European patent EP 1177868B1 discloses small volume for a kind of relatively conventional electric circular saw, more lightly, Portable cutter easy to operation.The portable cutter include a less saw blade, the motor for driving saw blade, Casing, casing are anterior to be used for housing transmission mechanism etc., and cabinet rear is used for housing motor etc., and this small portable cutter does not have Have and single handle is set, the rear portion of casing can be used as handle use, and this portable cutter is no individually to determine shield, machine Saw blade top is contained in wherein by shell front portion, and this casing front portion is equivalent to the shield of determining of traditional electric circular saw, and one individually Dynamic shield is movably installed on casing front portion, and the dynamic shield includes shield bottom and four side walls extended upwardly from the bottom portion, Shield bottom is provided with opening and is used to saw blade is therefrom stretched out, and moves shroud ring and sets around housing is anterior, and relative to casing before Portion is removable so that the saw blade depth exposed is different.This portable cutter structure is relatively easy, is relatively adapted to cutting Compared with thin workpiece.

, should but the both sides of the dynamic shield of the portable cutter of No. EP1177868B1 announcement are provided with the projection of activity Projection is used to prevent dynamic shield anterior mobile relative to casing.Press the projection, can make shield activity anterior with respect to casing so as to The saw blade exposed is used to cut.But because projection is arranged on dynamic shield, it result in using very not apart from handle farther out Just.And main switch of the projection completely with controlling motor running is separated and be independently arranged, therefore, operating personnel probably exist Push projection is forgotten when main switch has been switched on, so as to which normal work can not be carried out.

Utility model content

Technical problem to be solved in the utility model is：A kind of easy to operate, safe portable cutter is provided.

In order to solve the above problems, technical scheme provided by the utility model is：A kind of portable cutter, including, shell Body；The motor being contained in the housing, for driving saw blade to be rotated around axis F；Bottom plate, it is movably connected on the housing； Cover assembly, including determine shield and dynamic shield for cover the saw blade, the dynamic shield are determined shield and moved relative to described And expose the saw blade；The switch module of installation on the housing, the switch module include what is electrically connected with the motor Microswitch, the exercisable switch lever for triggering the microswitch, the lock piece of the switch lever can be locked and by described Lock piece operates and can prevent the stop part of dynamic shield, and the lock piece has locks the dynamic shield and the switch simultaneously The latched position of bar position while the off-position for discharging the dynamic shield and the switch lever, and the release dynamic shield but Lock the centre position or the centre position of the release switch lever but the locking dynamic shield of the switch lever.

Preferably, the lock piece moves along the direction parallel to the axis F.

Preferably, the lock piece include be removably set on the housing main part, the backstop can be driven The drive division of part movement, the abutting part for being capable of switch lever movement described in backstop.

Preferably, the stop part is spindle rotationally arranged on the housing around pivot center.

Preferably, the stop part includes the connection being spindle rotationally arranged in around the pivot center on the housing Portion, the stopper section that the dynamic shield movement can be prevented and the contact site abutted with the lock piece.

Preferably, the lock piece is movably disposed on the housing, and the moving direction of the lock piece and institute It is vertical to state pivot center.

Preferably, one end of the dynamic shield contacts with the bottom plate.

Preferably, one end of the dynamic shield sets roller, the roller and the contacts baseplate.

Preferably, the dynamic shield rotates around the axis F.

Preferably, the bottom plate is included towards the first side of the cover assembly and the second side being disposed opposite to each other, described dynamic Shield is always positioned at first side.

Preferably, the housing is rotatablely connected with the housing around pivot axis.

Preferably, the bottom plate has front end and the rear end being oppositely arranged, the pivot axis position away from the motor In the front end.

In order to solve the above problems, the utility model, which provides another technical solution, is：A kind of portable cutter, bag Include：Housing；The motor being contained in the housing, for driving saw blade to be rotated around axis F；Bottom plate, can around pivot axis What is rotated is connected to the housing；Cover assembly, including what is be fixedly connected with the housing determine shield and around the axis F turns The dynamic dynamic shield set, wherein described determine shield for covering most of saw blade, the dynamic shield is for covering fraction saw blade； Installation switch module on the housing, it is microswitch that the switch module includes electrically connecting with the motor, operable The triggering microswitch switch lever, the lock piece of the switch lever can be locked and simultaneously energy operate by the lock piece Enough stop parts for preventing dynamic shield, the lock piece have the locking bit for locking the dynamic shield and the switching beam position simultaneously Put while discharge the off-position of the dynamic shield and the switch lever, and the release dynamic shield but the locking switch lever Centre position.

Portable cutter is by setting the lock piece of controllable switch bar and dynamic shield, the person's of being convenient to operation operation, and And the lock piece has the latched position, the centre position and the off-position, grasped without worrying that operator can miss Make startup portable cutter, be arranged such and greatly improve user's processing safety.

Brief description of the drawings

Further detailed description is done to the utility model below in conjunction with the accompanying drawings.

Fig. 1 is the stereogram (not installing saw blade) for the portable cutter that the utility model discloses.

Fig. 2 is the front view of the portable cutter disclosed in Fig. 1, and now bottom plate is located at first position.

Fig. 3 is the partial perspective view of the portable cutter disclosed in Fig. 1.

Fig. 4 is the front view of the portable cutter disclosed in Fig. 1, and now bottom plate is located at the second place.

Fig. 5 is the rearview of the portable cutter disclosed in Fig. 1.

Fig. 6 a are the partial perspective view of the portable cutter disclosed in Fig. 1, and now lock piece is located at latched position.

Fig. 6 b are the partial front elevation view of the portable cutter disclosed in Fig. 6 a.

Fig. 6 c are along the middle cut-away view along A-A directions in Fig. 6 b.

Fig. 7 is the fragmentary sectional view of the portable cutter disclosed in Fig. 1

Fig. 8 a are the partial perspective view of the portable cutter disclosed in Fig. 1, and now lock piece is centrally located.

Fig. 8 b are the partial front elevation view of the portable cutter disclosed in Fig. 8 a.

Fig. 8 c are along the middle cut-away view along B-B directions in Fig. 8 b.

Fig. 9 a are the partial perspective view of the portable cutter disclosed in Fig. 1, and now lock piece is located at off-position.

Fig. 9 b are the partial front elevation view of the portable cutter disclosed in Fig. 9 a.

Fig. 9 c are along the middle cut-away view along C-C directions in Fig. 9 b.

30. the cutter unit of 32. housing of portable cutter 34.

36. the housing of 38. switch module of bottom plate 40. is anterior

42. the saw blade axis of 44. housing central section of rear 46.

48. saw blade 50., which determines shield 52., moves shield

54. the stop surface of 56. top edge of roller 58.

60. the bottom base plate of 62. flexible member of bearing surface 64.

66. the auxiliary shield of 68. first auxiliary shield of saw blade through hole 70. second

72. the support of 74. pivot axis of observation window 76.

78. the torsion spring of 80. deep-slotted chip breaker of spacer pin 81.

82. the adjusting part of 84. arc opening of depth adjusting mechanism 86.

88. the lock piece of 90. switch lever of confined planes 92.

94. the axis of 96. rotating shaft of stop part 98.

100. the abutting part of 102. drive division of main part 104.

106. the connecting portion of 108. first reset element of press section 110.

112. the pivot center of 114. contact site of stopper section 116.

118. the projection of back-moving spring 120.

Embodiment

Referring to Fig. 1, the utility model embodiment provides a kind of portable cutter 30.Portable cutter 30 includes Housing 32, the motor (not shown) being housed in housing 32, the transmission component (figure in housing 32 for passing power Not shown in), the cutter unit 34 that is connected with housing 32, the bottom plate 36 being connected with cutter unit 34, controlled on housing 32 The switch module 38 whether motor works.In description of the present utility model, unless otherwise noted, direction term, such as forward and backward, It is left and right, upper and lower etc., the direction of the normal use portable cutter is relative to, before defining portable cutter Enter before direction is, the direction opposite with the direction of advance of portable cutter be after etc..

The power supply of portable cutter 30 is AC power, i.e., is powered by AC power to motor.Certainly it is portable to cut Cutting mill 30 can also be powered using direct current energy, i.e., install battery bag on portable cutter 30, by battery bag to Motor is powered.

Motor can be carbon brush motor, brushless motor etc., or the energy source corresponding to portable cutter 30, motor Can be alternating current motor or d.c. motor.Motor has motor output shaft (not shown), and by motor output shaft Gear is installed to export the rotation of motor.

Housing 32 includes the rear 42 of housing front portion 40 and lengthwise extension, wherein housing front portion 40 and cutter unit 34 Connection, for housing transmission component；Rear 42 is used to house motor, and is provided with air inlet on rear 42 (not shown) and air outlet (not shown), form air channel cooling motor.The longitudinal extending axis of rear 42 is E.Motor is defeated The longitudinal extending axis E of shaft and rear 42 be arranged in parallel.

Cutter unit 34 is arranged on the side of housing front portion 40, because motor is arranged in rear 42, away from bottom plate 36, in this way, housing front portion 40 is larger in the free space of the opposite side away from cutter unit 34, it is easy to set other structures.

Housing central section 44 is formed in the part that housing front portion 40 is connected with rear 42.In order to more rationally utilize housing The structure at middle part 44, housing central section 44 is designed to the grip part 44 of portable cutter 30, i.e., operator is by holding Hold the operation portable cutter 30 of portion 44 and carry out cutting work.Switch module 38 is then arranged on the grip part 44, person easy to operation The operating of motor can be easily controlled while whole machine is gripped.

And operator when holding grip part 44 equivalent to fulcrum is constituted between housing front portion 40 and rear 42, prop up The part of point both sides can mutually restrict under the influence of respective gravity, after realizing that operator holds grip part 44, portable cutting Machine 30 is in more stable state, is very easy to carry out cutting operation, improves the comfort level of operation, it is preferred that portable to cut The center of gravity of cutting mill 30 is located on grip part 44, and now portable cutter 30 has optimal operational comfort.

Certainly, grip part 44 is not limited to be formed portion 44 in the housing, can also in addition set and hold in the top of housing 32 Hold portion 44, the grip part 44 be connected to housing front portion 40 with rear 42 on etc., those skilled in the art are also possible to Other changes are made, but as long as its function is same or similar with the utility model with effect, the utility model guarantor all should be covered by In the range of shield.

The longitudinal extending axis of grip part 44 can be almost parallel with the longitudinal extending axis E phases of rear 42 or again Close and set, in the present embodiment, the longitudinal extending axis of grip part 44 and the longitudinal extending axis E phase mutual respects of rear 42 Close.

Referring to Fig. 2, cutter unit 34 includes being arranged on the saw blade 48 and shield that rotation is driven on saw blade axis 46 and by motor Shade assembly.

Transmission component is coupled with motor output shaft, and the power that motor output shaft exports is passed into saw blade by saw blade axis 46 48.Saw blade 48 is installed on one end of saw blade axis 46, and the other end of saw blade axis 46 can pass through direct geared and motor output shaft Gear is coupled, and realizes that motor driving saw blade axis 46 rotates.Certainly, it can also set and subtract between motor output shaft and saw blade axis 46 Fast gear etc., no longer describes in detail as space is limited herein.The axis F of saw blade axis 46 and the axis of motor output shaft mutually hang down It is straight to set, or substantially vertical setting.

Cover assembly include be fixedly connected with housing front portion 40 determine shield 50 and around saw blade axis 46 axis F rotate Dynamic shield 52.Determine the major part that shield 50 is used to cover saw blade 48, dynamic shield 52 is used for the fraction for covering saw blade 48.

Bottom plate 36 has towards the first side of cutter unit 34 (or motor) and the second side being disposed opposite to each other, and dynamic shield 52 begins Final position is in the first side.Referring to Fig. 3, dynamic shield 52 can substantially be in contact in sector, its one end with bottom plate 36.Specifically, can be The roller 54 rolled on bottom plate is provided with close to one end of bottom plate 36, top edge 56 is provided with the other end away from bottom plate 36. In the present embodiment, top edge 56 is substantially U-shaped, on opposite sides provided with stop surface 58 and bearing surface 60.Preferably, backstop Face 58 and bearing surface 60 are located in same level, certainly, if between the two can not also in same level.As for Stop surface 58 and acting on for bearing surface 60 the following will explain in detail.

In the present embodiment, top edge 56 is substantially U-shaped, on opposite sides provided with stop surface 58 and bearing surface 60.

Dynamic shield 52 and determine to be provided with flexible member 62 (reference can be made to Fig. 1) between shield 50, the flexible member 62 is with making Shield 52 is all the time towards the driving force of the direction motion contacted with bottom plate 36.I.e. dynamic shield 52 is all the time towards the side of covering saw blade 48 To motion.

Bottom plate 36 includes bottom base plate 64, in the course of work, by bottom base plate 64 against on the surface of the workpiece.On bottom plate 36 Saw blade through hole 66 is additionally provided with, saw blade through hole 66 extends there through for saw blade 48.

Referring to Fig. 2, first, second auxiliary shield 68 and 70 is additionally provided with bottom plate 36, for covering the bottom of saw blade 48 Point.First auxiliary shield 68 is arranged on the front end of bottom plate 36, and the observation window of observable saw blade is additionally provided between bottom plate 36 72.Second auxiliary shield 70 is arranged on the rear end of bottom plate 36, and the observation window 72 of observation saw blade is provided with equally between bottom plate 36. First, second auxiliary shield 68 and 70 can be fixedly connected on bottom plate 36, naturally it is also possible to be integrally formed with bottom plate 36.And In the present embodiment, for first, second auxiliary shield 68 and 70 not in same plane, the second auxiliary shield 70 relative first is auxiliary Help the outside (reference can be made to Fig. 1) of shield 68.Certainly, if being not provided around the dynamic shield 52 of axis F rotations, but by first, The cooperation of second auxiliary shield 68 and 70 determines shield 50 and is completely covered by saw blade 48, will move shield 52 and be fixedly installed on bottom plate, Dynamic shield 52 follows bottom plate together relative to shield motion, while setting stop surface 58 and bearing surface 60 on dynamic shield is determined, equally Creating conception of the present utility model can be realized.

Cutter unit 34 can be rotatably mounted to bottom plate 36 around pivot axis 74.Specifically, bottom plate 36 is around pivot Axis 74 is connected with determining shield 52.In the present embodiment, pivot axis 74 is parallel with the axis F of saw blade axis 46.Bottom plate 36 has The front end of remote motor and the rear end being oppositely arranged, pivot axis 74 are located at the front end of bottom plate 36.Cutter unit 34 and bottom plate 36 Rotatable connection so that the relative cutter unit 34 of bottom plate 36 is movably from first position to the second place.When bottom plate 36 When first position, saw blade 48 does not expose (reference picture 2) from saw blade through hole 66, when bottom plate 36 is located at the second place, saw blade 48 it is at least part of expose (reference picture 4) from saw blade through hole 66, now, portable cutter 30 can be used to workpieces processing.

And during bottom plate 36 is moved to the second place from first position, move shield 52 rotates around axis F, gradually It is housed in and determines in shield 50；Meanwhile roller 54 slides on bottom plate 36, the friction between dynamic shield 52 and bottom plate 36 can be reduced Power.

Position-limit mechanism is additionally provided between housing 32 and bottom plate 36, the position-limit mechanism is used to limit the relative cutting list of bottom plate 36 The slewing area of member 34 or housing 36.Fig. 5 is referred to, position-limit mechanism includes the support 76 being fixedly connected on bottom plate 36 and connected The spacer pin 78 being connected on housing front portion 40.Support 76 is provided with deep-slotted chip breaker 80, circle corresponding to the circular arc where the deep-slotted chip breaker 80 The heart is located on pivot axis 74.Spacer pin 78 arcuately groove 80 can slide, so as to limit bottom plate 36 relative to cutter unit 34 Slewing area.

Determining to be additionally provided with torsion spring 81 between shield 50 and bottom plate 36.Specifically, one end of torsion spring 81 is fixedly connected on bottom plate On 36；The other end, which is fixedly connected on, to be determined on shield 50, and torsion spring 81 provides to bottom plate 36 all the time makes bottom plate 36 away from housing 32 Position motion power, so as to realize when operator complete cutting work when, bottom plate 36 returns back to first position, i.e. saw blade 48 not Expose from saw blade through hole 66, personal injury is caused so as to avoid saw blade 48 from exposing.Certainly, torsion spring is arranged on housing 32 and bottom Between plate 36, the power for making bottom plate 36 be moved away from the position of housing 32 can be equally provided, so as to improve security.

Certainly, bottom plate 36 is not limited only to pivotable motion relative to shield 50 is determined, and it can also be rectilinear movement.Equally can be with Realize creating conception of the present utility model.

Referring back to Fig. 2, portable cutter 30 is provided with depth adjusting mechanism 82, for adjusting the depth of cutting.Depth is adjusted Section mechanism 82, which includes being arranged on, to be determined arc opening 84 on shield 50 and can be slided in arc opening 84 and can be in any position Put the adjusting part 86 of positioning.Determine shield 50 close to the position of arc opening 84 be provided with sign cutting-in scale (do not scheme Show).Adjusting part 86 is connected including installing plate (non-label), the spanner for being connected with installing plate and having cam surface, with installing plate For indicating the pointer of current scale.Wherein, installing plate and spanner are respectively positioned at the two sides for the side plate for determining shield 50.Spanner can be grasped That makees is pressed by cam towards shield 50 is determined, and will be determined shield 50 and is clamped between cam surface and installing plate, so as to realize regulation The positioning of component 86, now the scale indicated by pointer is the depth that portable cutter 30 is cut.

Installing plate includes the confined planes 88 that cooperation may be selected with the bearing surface 60 on dynamic shield 52., it is necessary to adjust in work During depth, spanner is first lifted, spanner is in the position opened, now, being arcuately open 84 is slidably installed plate, and pointing to pointer needs The deep calibration value wanted.After depth has been set up, spanner is depressed, spanner is in the position closed, now installing plate is locked in arc The a certain position of shape opening 84.When cutting workpiece, bottom base plate 64 is pressed on the surface of the workpiece, and operator holds grip part 44, and One pressure of rear is applied to, the opposed bottom 36 of shield 50 is now determined and is rotated around pivotal axis 74, until dynamic The bearing surface 60 of shield 52 contacts with confined planes 88, exposes the saw blade 48 of certain depth and can be processed workpiece.

Switch module 38 is installed on grip part 44, close to housing front portion 40.Refer to Fig. 6 a, switch module 38 include with Motor electrical connection microswitch (not shown), it is exercisable triggering microswitch switch lever 90, being capable of locking switch bar 90 Lock piece 92 and operated by lock piece 92 and the stop part 94 of dynamic shield 52 can be prevented.

In the present embodiment, switch lever 90 is pivotable is installed on grip part 44, and switch lever 90 herein also may be used certainly To be that grip part 44 is installed in a manner of sliding.

Switch lever 90 has rotating shaft 96, i.e. switch lever 90 is installed on grip part 44 by rotating shaft 96, and can be surrounded The axis 98 of rotating shaft 96 rotates, and is in switch lever 90 and is contacted with microswitch, the position of starter motor；Or switch lever 90 with it is micro- Dynamic switch disengages, in the position for closing motor.Spring (not shown), the spring are additionally provided between switch lever 90 and housing 32 All the time being provided to switch lever 90 makes switch lever 90 work as operator towards the power moved with the position that microswitch disengages so as to realize When completing cutting work, switch lever 90 can automatically return to the position disengaged with microswitch, improve portable cutter Security.

In the present embodiment, the axis 98 of rotating shaft 96 and the axis F of saw blade axis are parallel, make the rotation direction of switch lever 90 Parallel with the plane where saw blade 48, being arranged such very easily can be with operation when making operator's gripping portable cutter Switch lever 90.

With reference to Fig. 6 a, 6b, 6c and Fig. 7, lock piece 92 includes being slidably connected at main part 100 on grip part 44, can The drive division 102 of the movement of stop part 94 is driven, be capable of the abutting part 104 of the movement of stop switch bar 90 and lock is made by operator's pressing The press section 106 that stop member 92 is slided.

Herein, axis F of the lock piece 92 along saw blade axis 46 is moveably mounted on grip part 44.That is lock piece 92 Moving direction is E perpendicular to the longitudinal extending axis of rear 42.In this way, the operation direction of lock piece 92 and switch lever 90 Direction is different, therefore will not interfere with each other between the two, is also not easy maloperation.

Operator is exercisable to press to press section 106, has lock piece 92 while locks dynamic shield 52 and switch lever 90 Latched position and meanwhile the off-position of the dynamic shield 52 of release and switch lever 90, and the dynamic shield 52 of release and locking switch bar 90 centre position.It can be seen that pressing lock piece 92 by the direction of the axis F along saw blade axis, lock piece 92 can be made to be in locking Position, off-position or centre position.The safety in utilization for greatly improving portable cutter is arranged such, is operated simultaneously It is easy.

Be also equipped with the first reset element 108 between lock piece 92 and grip part 44, the first reset element 108 all the time to Lock piece 92, which provides, makes the power that lock piece 92 moves towards latched position, so as to realize when operator completes cutting work, just The position of the dynamic shield 52 of locking and switch lever 90 automatically of formula cutting machine 30 is taken, is made so as to avoid the unconscious maloperation of operator Into personal injury, security is greatly improved.

In the present embodiment, the first reset element 108 is the spring being set on the protruded stigma of main part 100, is so set Put simple in construction, and cost is relatively low.Certain first reset element 108 can also use other technologies scheme, such as in lock piece 92 Torsion spring etc. is set between grip part 44, no longer introduced one by one as space is limited herein, but realize that the technical scheme of this function all should It is covered by scope of protection of the utility model.

Stop part 94 is rotatably coupled on housing 32, including be connected with housing 32 connecting portion 110, can prevent to move The stopper section 112 of the movement of shield 52 and the contact site 114 abutted with drive division 102.

Connecting portion 110 relative to the vertically bending extension of contact site 114, and stopper section 112 relative to connecting portion 110 along same Plane extension forms.Contact site 114 and stopper section 112 substantially form T-shape.

Connecting portion 110 may be rotatably mounted on housing 32 around pivot center 116, it is preferred that the pivot center 116 and lock The glide direction of stop member 92 is vertical.Certainly, if out of plumb is set, only needing button to stop when button 92 slides can drive contact site 114 to rotate .When lock piece 92 is in the locked position, stopper section 112 abuts with the stop surface 58 of dynamic shield 52, can keep out dynamic shield 52 movements, to prevent cutter unit 34 from being rotated around pivot axis 74.When pressing lock piece 92, drive division 102 is set to promote to contact Portion 114 rotates around pivot center 116, and stopper section 112 disengages and contacted with the stop surface 58 of dynamic shield 52, now, moves shield 52 The axis F that saw blade axis can be surrounded is rotated.

Back-moving spring 118 can be set between stop part 94 and housing 32, be at locking to stop part 94 to apply Surely the power of the dynamic direction of shield 52 motion, so as to which when operator unclamps lock piece 92, stop part 94 automatically resets, it is ensured that dynamic shield 52 by backstop, improves processing safety.

When lock piece 92 is in the locked position, abutting part 104 can keep out switch lever 90, to prevent switch lever 90 from triggering Microswitch.In the present embodiment, switch lever 90 is provided with the projection 120 towards lock piece 92, when projection 120 and abutting part 104 abut against, and when switch lever 90 is locked out 92 backstop of part, now realizes and prevent the position of switch lever 90 from being moved.

Also referring to Fig. 6 a, 6b, 6c and Fig. 7, in an initial condition, lock piece 92 is in locking to portable cutter 30 Position, now operator can not press switch lever 90 to start portable cutter 30, shield 52 is surrounded saw blade The axis F of axle is rotated, and cutter unit 34 is rotated relative to bottom plate to expose saw blade.

Fig. 8 a, 8b, 8c are referred to, when operator, which operates portable cutter 30, carries out cutting work, can be pressed first Press section 106 moves axis F of the lock piece 92 along saw blade axis direction, during lock piece 92 moves, drives first Portion 102 can drive stop part 94 to be rotated around pivot center 116, cause stopper section 112 can not be with the stop surface 58 of dynamic shield 52 Abut against, i.e., dynamic shield 52 is in the release conditions that freely can be moved relative to shield 50 is determined, but the abutting part 104 of lock piece 92 It is still able to keep out the projection 120 of switch lever 90, switch lever 90 can not be turned to trigger position, that is, locked switch lever 90 Position, now lock piece 92 be in centre position.Bottom base plate 64 can be resisted against on workpiece by operator, press cutter unit 34 make it be rotated around pivot axis 74, the sawtooth of saw blade can be watched by observation window, if with line of cut (in advance on workpiece Finish) alignment.

Refer to Fig. 9 a, 9b, 9c, when operator continue press press section 106, lock piece 92 is continued the axle along saw blade axis Line F direction movement, make the disengagement of abutting part 104 and the abutting of the projection 120 of switch lever 90 of lock piece 92, now, operator Pressing switch lever 90 will not the backstop of abutting portion 104 and microswitch can be triggered, now lock piece 92 is in off-position, behaviour Author can carry out cutting work using portable cutter 30.And in the course of the work, operator need to only press switch lever 90 press lock piece 92 without continuing, and operation is more convenient.

Certainly, the centre position that lock piece 92 has is not only limited to discharge dynamic shield 52 and locking switch bar 90, locking The centre position of part 92 can also be release-push bar 90 and lock dynamic shield 52.The abutting part 104 of namely lock piece 92 is first Disengage with the abutting of projection 120, allow triggering microswitch that switch lever 90 is operated and starter motor, and now stopper section 112 stop surface 58 still with dynamic shield 52 abuts against, that is, has locked the position of dynamic shield 52.

Be arranged such, operator can first starter motor, stopper section 112 is disengaged and the stop surface of dynamic shield 52 again 58 are abutted against, i.e., dynamic shield 52 can be moved freely relative to determining shield 50.In this way, can be in the case where saw blade 48 runs at high speed Dynamic shield 52 is opened again, i.e., saw blade 48 is contacted with workpiece in the case where saw blade 48 runs at high speed, so as to prevent the feelings kicked Condition occurs, safer.

The utility model is not limited to aforementioned embodiments, and those skilled in the art open the utility model technical spirit It is also possible to make other changes under showing, but as long as the function of its realization and the utility model are same or similar, this all should be covered by In the range of utility model protection.

Claims (13)

1. A kind of 1. portable cutter, it is characterised in that the portable cutter includes,

   Housing；

   The motor being contained in the housing, for driving saw blade to be rotated around axis F；

   Bottom plate, it is movably connected on the housing；

   Cover assembly, including determine shield and dynamic shield for cover the saw blade, the dynamic shield determines shield relative to described Motion；

   Installation switch module on the housing, microswitch that the switch module includes electrically connecting with the motor, can The switch lever of the triggering microswitch of operation, the lock piece of the switch lever can be locked and operated by the lock piece And the stop part of dynamic shield can be prevented, the lock piece has the lock for locking the dynamic shield and the switching beam position simultaneously Positioning is put while discharges the off-position of the dynamic shield and the switch lever, and is opened described in the release dynamic shield but locking Close the centre position or the centre position of the release switch lever but the locking dynamic shield of bar.
2. 2. portable cutter according to claim 1, it is characterised in that：The lock piece is along parallel to the axis F Direction movement.
3. 3. portable cutter according to claim 2, it is characterised in that：The lock piece includes being removably set on institute The main part on housing is stated, the drive division of the stop part movement can be driven, be capable of the abutting of switch lever movement described in backstop Portion.
4. 4. portable cutter according to claim 1, it is characterised in that：The stop part is rotatable around pivot center Setting on the housing.
5. 5. portable cutter according to claim 4, it is characterised in that：The stop part includes surrounding the rotary shaft Connecting portion that line is spindle rotationally arranged on the housing, the stopper section that the dynamic shield movement can be prevented and with the lock The contact site that stop member abuts.
6. 6. portable cutter according to claim 4, it is characterised in that：The lock piece is movably disposed at described On housing, and the moving direction of the lock piece is vertical with the pivot center.
7. 7. portable cutter according to claim 1, it is characterised in that：On one end of the dynamic shield and the bottom plate Contact.
8. 8. portable cutter according to claim 7, it is characterised in that：One end of the dynamic shield sets roller, institute State roller and the contacts baseplate.
9. 9. portable cutter according to claim 1, it is characterised in that：The dynamic shield rotates around the axis F.
10. 10. portable cutter according to claim 9, it is characterised in that：The bottom plate is included towards the shield group First side of part and the second side being disposed opposite to each other, the dynamic shield are always positioned at first side.
11. 11. portable cutter according to claim 1, it is characterised in that：The housing is rotatable around pivot axis Be connected to the housing.
12. 12. portable cutter according to claim 11, it is characterised in that：The bottom plate has away from the motor Front end and the rear end being oppositely arranged, the pivot axis are located at the front end.
13. A kind of 13. portable cutter, it is characterised in that the portable cutter includes,

    Housing；

    The motor being contained in the housing, for driving saw blade to be rotated around axis F；

    Bottom plate, the housing is rotatablely connected with around pivot axis；

    Cover assembly, including the dynamic shield determined shield and setting is rotated around the axis F being fixedly connected with the housing, its Described in determine shield and be used to cover most of saw blade, the dynamic shield is used to cover fraction saw blade；

    Installation switch module on the housing, microswitch that the switch module includes electrically connecting with the motor, can The switch lever of the triggering microswitch of operation, the lock piece of the switch lever can be locked and operated by the lock piece And the stop part of dynamic shield can be prevented, the lock piece has the lock for locking the dynamic shield and the switching beam position simultaneously Positioning is put while discharges the off-position of the dynamic shield and the switch lever, and is opened described in the release dynamic shield but locking Close the centre position of bar.