CN207255919U - A kind of device for preventing that emery wheel from dropping with dismounting - Google Patents

Abstract

The utility model discloses a kind of device for preventing emery wheel from dropping with dismounting, including active shaft member, its one end to be connected with emery wheel, the active shaft member rotation drives the emery wheel also to rotate together, cut substrate is ground, its outside is equipped with housing, and the housing is equipped with connecting hole；And protector, it includes extending neck, and the extension neck is equipped with connection bump, and the connection bump is engaged with the connecting hole so that the protector and the housing are fixed.The utility model realizes the dismounting between protector and device using connecting hole and connection bump, is conveniently replaceable.Realized by the first dust-leading board and the second dust-leading board to cutting the water conservancy diversion of dirt, and make its one-way movement, guide cutting dirt into dust-collecting box, the strainer on dust-collecting box can divulge information, and give and wind-force is provided inside whole device, and also have and reduce the excessive effect of internal temperature.

Description

A kind of device for preventing that emery wheel from dropping with dismounting

Technical field

The technical field of electric tool is the utility model is related to, prevents emery wheel from dropping more particularly, it relates to which dismounting can be carried Device.

Background technology

Frosted turbine suitable for it is soft or hard and extremely hard material broken, shaping, be widely used in various ores, cement, Refractory material, bauxite clinker, diamond dust, frit, mechanism building sand, building stones and various metallurgical slags, especially to carbon SiClx, diamond dust, sintered bauxite, the contour hard, ultrahard of U.S. sand and the other types of crusher yield work(of resistance to abrasion material ratio Imitate higher.It is the commonly used equipment for sharpening various instruments, cutter, is a kind of sand milling type electric tool, is widely used in industrial and mineral enterprise In the production activity of industry.Extremely simplified with overall transmission mechanism it is perfect, make the process of grinding more convenient smooth and improve it is whole The effect of grinding efficiency of body abrasive machine.It is Machine-made Sand, bedding material, bituminous concrete and cement concrete bone in engineering field The preferable production equipment of material；In mining industry field, ore grinding front process is widely used in, it can produce substantial amounts of fine ore, reduce The ore grinding load of high cost.

Traditional frosted turbine, to avoid dust splashes from being provided with the cover body of semicircular sector, but the dust in cover body Often accumulation causes the rotating speed of grinding abrasive disk to be subject to large effect, and long-time service this cover body, have the accumulation of dust, it is necessary to Cover body is replaced in time, and if this is inconvenient to dismantle, can waste of resource, and dust-proof function can only also be used just significantly When it is effective, used a period of time after on the contrary influence emery wheel work efficiency, and destroy worker working environment.

Utility model content

The purpose of this part is to summarize some aspects of the embodiment of the utility model and briefly to introduce some preferable Embodiment.It may do a little simplified or be omitted to keep away in this part and the description of the present application summary and utility model title The purpose for exempting to make this part, specification digest and utility model title obscures, and this simplification or omission cannot be used for limitation originally The scope of utility model.

In view of above-mentioned and/or emery wheel problem present in cutting work, it is proposed that the utility model.

Therefore, the one of purpose of the utility model is to provide one kind and protects human hand not to be bruised and prevent sand with dismounting The device to drop is taken turns, and cutting dirt is unidirectionally discharged to outside dust shield case, ensures the working environment of worker.

In order to solve the above technical problems, the utility model provides following technical solution：One kind prevents emery wheel from falling with dismounting The device fallen, including active shaft member, its one end are connected with emery wheel, and the active shaft member rotation drives the emery wheel also to revolve together Turn, be ground cut substrate, its outside is equipped with housing, and the housing is equipped with connecting hole；And protector, it includes extending neck, institute State extension neck and be equipped with connection bump, the connection bump is engaged with the connecting hole so that the protector and the shell Body is fixed.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described Protector further includes dust shield case, and the dust shield case is in hollow semi-annular, and the dust shield case is internally provided with the first dust-leading board With the second dust-leading board, the dust shield case is divided into two relatively independent stones by first dust-leading board and the second dust-leading board Space and lead dirt space；Wherein, the angle of inclination of first dust-leading board is more than the angle of inclination of second dust-leading board, and institute The intersection point of the second dust-leading board and first dust-leading board is stated in the stone space, and both are not mutually closed, and cut Dirt enters from stone space by the gap between the first dust-leading board and the second dust-leading board and leads dirt space, and be unidirectional fortune It is dynamic.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described Protector further includes dust-collecting box, and the dust-collecting box is connected with the dust shield case, wherein, it is logical that the dust shield case is equipped with first Hole, the dust-collecting box are equipped with the second through hole, and the first through hole is connected and connects with second through hole, and cutting dirt passes through The first through hole and second through hole, lead in dirt spatial movement to the dust-collecting box from described.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described The upper end of dust-collecting box is equipped with strainer, and the dust shield case and the dust-collecting box are divulged information by the strainer.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described It is detachable between strainer and the dust-collecting box.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described It is detachable between dust shield case and the dust-collecting box.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：Also wrap Include, actuator, be connected with the active shaft member, drive the active shaft member rotary motion, drive the emery wheel to operate, including Control piece, it protrudes the outside for being arranged on the housing.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：Also wrap Handpiece is included, it is connected with the housing, and is placed on the outside of the actuator, and the control piece protrusion is arranged on described Outside handpiece, including friction shell, the friction shell are in gear-like, and when holding, hand catches the friction shell.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described Handpiece further includes hand protecting cover, and the hand protecting cover is arranged on the outside of the friction shell, and in hollow circular platform type, cross section is ladder Shape.

As a kind of preferred solution of the device described in the utility model for preventing emery wheel from dropping with dismounting, wherein：It is described Handpiece further includes fastener, and the fastener is connected with the hand protecting cover, including retainer plate and locking member；Wherein, it is described Retainer plate is equipped with two through holes, and the locking member includes screw bolt and nut, and the bolt passes through the through hole on the retainer plate, Fixed with the nut in the other end.

The beneficial effects of the utility model：The utility model using connecting hole and connection bump realize protector and device it Between dismounting, be conveniently replaceable.Realized by the first dust-leading board and the second dust-leading board to cutting the water conservancy diversion of dirt, and it is unidirectionally transported It is dynamic, guide cutting dirt into dust-collecting box, the strainer on dust-collecting box can divulge information, and give and wind-force is provided inside whole device, and also have and drop The excessive effect of low internal temperature.

Brief description of the drawings

It is required in being described below to embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some implementations of the utility model Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings Obtain other attached drawings.Wherein：

Fig. 1 is the master in the first embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting The overall structure diagram of moving axis part；

Fig. 2 is described anti-in the first embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting The overall structure diagram of guard；

Fig. 3 is described anti-in second of embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting The overall structure diagram of guard；

Cut described in second of embodiment that Fig. 4 prevents the device that emery wheel drops from providing for the utility model with dismounting Cut the schematic diagram for flowing to direction of dirt；

Band in the third embodiment that Fig. 5 prevents the device that emery wheel drops from providing for the utility model with dismounting is State the overall structure diagram of dust-collecting box；

Band in the 4th kind of embodiment that Fig. 6 prevents the device that emery wheel drops from providing for the utility model with dismounting is State the overall structure diagram of control piece；

Fig. 7 is the band in the 5th kind of embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting There is the overall structure diagram of handpiece；

Fig. 8 is the shield in the 6th kind of embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting The overall structure diagram of hand cover；

Fig. 9 is described tight in the 7th kind of embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting The integrated model schematic diagram of firmware；

Figure 10 is the entirety in the 7th kind of embodiment that the utility model prevents the device that emery wheel drops from providing with dismounting Structure diagram.

Embodiment

It is attached with reference to specification to enable the above-mentioned purpose of the utility model, feature and advantage more obvious understandable Figure is described in detail specific embodiment of the present utility model.

Many details are elaborated in the following description in order to fully understand the utility model, but this practicality is new Type can also be implemented using other different from other manner described here, and those skilled in the art can be without prejudice to this reality With doing similar popularization in the case of new intension, therefore the utility model is from the limitation of following public specific embodiment.

Secondly, " one embodiment " or " embodiment " referred to herein refers to may be included at least one reality of the utility model A particular feature, structure, or characteristic in existing mode." in one embodiment " that different places occur in the present specification is not Same embodiment is referred both to, nor the single or selective embodiment mutually exclusive with other embodiment.

Referring to Figures 1 and 2, implement for the utility model with dismantle the device for preventing emery wheel from dropping offer first Example, the main body of the device includes active shaft member 100 and protector 200, and with reference to Fig. 1,100 one end of active shaft member is connected with emery wheel, When active shaft member 100 rotates, emery wheel is driven also to rotate together, so as to be ground cut substrate, emery wheel is fixed on driving shaft by through hole The upper end of part 100, and compressed by pressing plate a.The outside of active shaft member 100 is equipped with housing A, and housing A is equipped with connecting hole 101, Connecting hole 101 can be through the through hole of housing A or not through the blind hole on housing A, it should be noted that such as , it is necessary to be equipped with multiple blind holes on housing A when if connecting hole 101 is blind hole, it is preferred that symmetrical to set two in mutually right The hole of facade is as connecting hole 101.

With reference to Fig. 2, protector 200 is placed on the outside of emery wheel, that is, avoids and place emery wheel and drop suddenly and allow user The accident for hurting or damaging, while also place cutting dirt and dancing in the air in the localities, reduce the working environment of user.Protector 200 include extending neck 201 and dust shield case 202, and it is that a semicircular ring has stretched a spacing along a certain assigned direction to extend neck 201 From generation, it, which is protruded, extends in the lower end of dust shield case 202, extends neck 201 and is equipped with connection bump 201a, connection bump 201a It is engaged with connecting hole 101 so that interfix between protector 200 and housing A.Dust shield case 202 is in hollow semi-annular, Emery wheel is placed at inner hollow, in operating cutting or grinding object, the cutting dirt of generation can drop in dust shield case 202 emery wheel It is interior, when cutting dirt accumulation to a certain extent, stop the work of active shaft member 100, and pass through connecting hole 101 and connection bump 201a is disassembled, and dust shield case 202 is disassembled from active shaft member 100, the cutting dirt of the inside is outwelled, is then reinstalled to On housing A.

With reference to Fig. 3, second embodiment that the device dismantled and prevent emery wheel from dropping provides, the reality are carried for the utility model Apply example is different from one embodiment：Dust shield case 202 is internally provided with the first dust-leading board 202a and the second dust-leading board 202b, And first dust-leading board 202a and the second dust-leading board 202b dust shield case 202 is divided into two relatively independent spaces, be respectively sand Take turns working space M and lead dirt space N.Wherein, the inclination angle of the first dust-leading board 202a is more than the inclination angle of the second dust-leading board 202b Degree, angle of inclination said herein is on the basis of the face where the center line of active shaft member 100, the first dust-leading board 202a or second Dust-leading board 202b is inclination angle relative to angle caused by this face.For example, the first dust-leading board 202a and active shaft member 100 The inclination angle between face where center line is 60 °, the second dust-leading board 202b and the face where the center line of active shaft member 100 it Between inclination angle be 30 °.It should be noted that the intersection point of the first dust-leading board 202a and the second dust-leading board 202b are empty in stone Between in M, and the first dust-leading board 202a and the second dust-leading board 202b are not mutually closed, that is to say, that the first dust-leading board 202a gives Cut the angle of the guiding role of dirt or scope is more than the angle mistake that the second dust-leading board 202b gives the guiding role of cutting dirt Scope, and the second dust-leading board 202b gives the angle of the guiding role of cutting dirt and lives scope and fall in the first dust-leading board 202a In the angle or scope for giving the guiding role of cutting dirt, but because between the first dust-leading board 202a and the second dust-leading board 202b Do not close mutually so that cutting dirt can be by the gap between the first dust-leading board 202a and the second dust-leading board 202b, to outward transport It is dynamic, so that, cutting dirt is entered from stone space M leads dirt space N, and the movement for cutting dirt is one-way movement, with reference to figure 4, it can only be entered from stone space M and lead dirt space N, it is impossible to enter stone space M from dirt space N is led.

With reference to Fig. 5, the 3rd embodiment that the device dismantled and prevent emery wheel from dropping provides, the reality are carried for the utility model Apply example is different from second embodiment：Protector 200 further includes dust-collecting box 203, and dust-collecting box 203 and 202 phase of dust shield case Connection.Specific embodiment is：Dust shield case 202 is equipped with first through hole 202c, and dust-collecting box 203 is equipped with the second through hole 203a, It is connected with each other and is interconnected between first through hole 202c and the second through hole 203a, cutting dirt can passes through the first dust-leading board 202a And the second gap between dust-leading board 202b, from stone space, M, which is entered, leads dirt space N, and the movement for cutting dirt is single To movement, it can only be entered from stone space M and lead dirt space N, it is impossible to entered stone space M from dirt space N is led, transport Move to first through hole 202c, moved to by the second through hole 203a201 from dirt space N is led in dust-collecting box 203.

Preferably, dust-collecting box 203 is not a totally enclosed box, upper end belongs to open and is equipped with strainer 203b, makes Obtaining dust shield case 202 and dust-collecting box 203 can be divulged information by strainer 203b.If stuffy, cutting dirt can stay in dust shield case In 202, so that cutting dirt has the power of movement, cutting dirt is moved along dirt space N is led for ventilation.

Preferably, it is detachable structure between strainer 203b and dust-collecting box 203, when needing to outwell cutting dirt, will filters Net 203b is disassembled from dust-collecting box 203, and cutting dirt is outwelled, as a preferred embodiment, dust shield case 202 and dust-collecting box It is detachable between 203, in this way, when needing to outwell the cutting dirt in dust-collecting box 203, avoid the need for dust shield case 202 and dust Box 203 is dismantled from active shaft member 100 together, as long as removing dust-collecting box 203, after outwelling cutting dirt, by strainer 203a on dust-collecting box 203, continues to allow device to work again.If working after a period of time, the hole on strainer 203b is cut Dirt is stopped or damaged, and can be replaced a new strainer 203b in time, not disturbed follow-up work, also increase each collection The service life of dirt box 203, saves material resource, reduces cost loss.

With reference to Fig. 6, the 4th embodiment that the device dismantled and prevent emery wheel from dropping provides, the reality are carried for the utility model Apply example is different from the 3rd embodiment：Actuator 300 is further included, drives active shaft member 100 to rotate by actuator 300 and transports It is dynamic.Specific embodiment is：Actuator 300 can be motor driving, can be electromagnetic drive or electric or hydraulic pressure Driving, gives the rotatably power of active shaft member 100, is preferably motor driving in the present embodiment.Actuator 300 and driving shaft Part 100 is connected, and drives active shaft member 100 to rotate, and then drives emery wheel operating so that emery wheel cuts object to be processed.

In the present embodiment, 100 outer cover of active shaft member is equipped with housing A, prevents active shaft member 100 in actuator 300 Under driving, run at high speed, user accidentallys run into the situation of injury.Actuator 300 further includes control piece 301, control piece 301 Control actuator 300 whether in running order, can be the knob for the switch or left rotation and right rotation stirred up and down.Compared with Good, control piece 301 protrudes the outside for being arranged on housing A, by stirring control piece 301, controls the operating mode of actuator 300 (closure disconnects).

With reference to Fig. 7, the 5th embodiment that the device dismantled and prevent emery wheel from dropping provides, the reality are carried for the utility model Apply example is different from the 4th embodiment：Handpiece 400 is further included, handpiece 400 is connected with housing A, and is placed on drive The outside for being arranged on handpiece 400 is protruded in the outside of moving part 300, at this time, control piece 301, is no longer arranged at the outside of housing A, When person so easy to operation operates, control piece 301 can be pressed at any time, controls the operating condition of device.

When it is hand-held prevent the device that emery wheel drops with dismounting when, if active shaft member 100 is moved, power is excessive, uses Person grasps device when skidding, and user can be allowed injured in use device, in order to avoid it is this kind of the occurrence of, handpiece 400 It is upper to include friction shell 401, when the present apparatus as handheld apparatus in use, human hand is gripped at friction shell 401.Friction shell 401 Cross section is gear-like, can increase the frictional force between human hand and handpiece 400, when preventing hand-held, hand and handpiece 400 it Between skid and cause injury to personnel.

With reference to Fig. 8, the 6th embodiment that the device dismantled and prevent emery wheel from dropping provides, the reality are carried for the utility model Apply example is different from the 5th embodiment：Handpiece 400 further includes hand protecting cover 402, and protection hand is encountered or hurt.Handguard Cover 402 is arranged on the outside of friction shell 401, and in hollow circular platform type, cross section is trapezoidal.Hand protecting cover 402 is arranged to circular platform type Meaning be：The flexible motion of hand can be facilitated, if if being arranged to hollow cuboid, being manually placed in hand protecting cover 402, hand It can be cut and encounter by the edge of hollow cuboid or diagonal angle when movement either moves position, make its injured, in being arranged to Empty circular platform type, by chance cleverly avoids this problem very much.The movable scope of hand or angle are comparatively larger, and When placing the transport present apparatus, space is saved.

With reference to Fig. 9 and Figure 10, the utility model carries the 7th embodiment that dismounting prevents the device that emery wheel drops from providing, What the embodiment was different from the 6th embodiment is：Hand protecting cover 402 is detachable device.In the present embodiment, hold Part 400 further includes fastener 403, wherein, fastener 403 is connected with hand protecting cover 402, passes through 403 hand protecting cover of fastener 402 is detachable.Fastener 403 includes retainer plate 403a and locking member 403b, wherein, retainer plate 403a is integrally formed can Bool, protrusion is respectively equipped with its both ends, and protrusion is equipped with two through holes.Locking member 403b include bolt 403b-1 and Nut 403b-2, bolt 403b-1 are fixed through the through hole on retainer plate 403a with nut 403b-2 in the other end.

Specifically, the main body of the device includes active shaft member 100, protector 200, actuator 300 and handpiece 400.It is main 100 one end of moving axis part is connected with emery wheel, when active shaft member 100 rotates, drives emery wheel also to rotate together, so that cut substrate is ground, Emery wheel is fixed on the upper end of active shaft member 100 by through hole, and is compressed by pressing plate a.The outside of active shaft member 100 is equipped with housing A, housing A are equipped with connecting hole 101, and connecting hole 101 can be through the through hole of housing A or not through on housing A Blind hole, it should be noted that if, it is necessary to be equipped with multiple blind holes on housing A when connecting hole 101 is blind hole, it is preferred that right Two holes in mutually contradictory face of setting of title are as connecting hole 101.

Protector 200 includes extending neck 201 and dust shield case 202, extends neck 201 and is equipped with connection bump 201a, connection is convex Play 201a to be engaged with connecting hole 101 so that interfix between protector 200 and housing A.Dust shield case 202 is in hollow half Circular ring type, emery wheel is placed at inner hollow, in operating cutting or grinding object, the cutting dirt of generation can drop anti-emery wheel In dirt box 202, when cutting dirt accumulation to a certain extent, stop the work of active shaft member 100, and by connecting hole 101 and even Meet raised 201a to disassemble, dust shield case 202 is disassembled from active shaft member 100, the cutting dirt of the inside is outwelled, then again It is installed on housing A.Dust shield case 202 is internally provided with the first dust-leading board 202a and the second dust-leading board 202b, and the first dust-leading board Dust shield case 202 is divided into two relatively independent spaces by 202a and the second dust-leading board 202b, be respectively stone space M and Lead dirt space N.Wherein, the inclination angle of the first dust-leading board 202a more than the second dust-leading board 202b angle of inclination, it is necessary to pay attention to It is that the intersection point of the first dust-leading board 202a and the second dust-leading board 202b are in the M of stone space, and the first dust-leading board 202a and Two dust-leading board 202b are not mutually closed, but because not closed mutually between the first dust-leading board 202a and the second dust-leading board 202b, are made Dirt must be cut can to move out by the gap between the first dust-leading board 202a and the second dust-leading board 202b, so that, cut dirt From stone space, M, which is entered, leads dirt space N, and the movement for cutting dirt is one-way movement.

Dust shield case 202 is equipped with first through hole 202c, and dust-collecting box 203 is equipped with the second through hole 202d, first through hole 202c And second be connected with each other and be interconnected between through hole 202d, cutting dirt can pass through the first dust-leading board 202a and the second dust-leading board Gap between 202b, from stone space, M, which is entered, leads dirt space N, and the movement for cutting dirt is one-way movement, Zhi Nengcong Stone space M, which is entered, leads dirt space N, it is impossible to enters stone space M from dirt space N is led, moves to first through hole At 202c, moved to by the second through hole 202d from dirt space N is led in dust-collecting box 203.Dust-collecting box 203 is not totally enclosed for one Box, upper end belong to open and are equipped with strainer 203a so that dust shield case 202 and dust-collecting box 203 can be led to by strainer 203a Wind.

Actuator 300 can be motor driving, can be electromagnetic drive or electric or hydraulic-driven, give The rotatably power of active shaft member 100, is preferably motor driving in the present embodiment.Actuator 300 is connected with active shaft member 100 Connect, and drive active shaft member 100 to rotate, and then drive emery wheel operating so that emery wheel cuts object to be processed.Actuator 300 Control piece 301 is further included, whether control piece 301 controls actuator 300 in running order, can be the switch stirred up and down, It can also be the knob of left rotation and right rotation.Preferably, control piece 301 protrudes the outside for being arranged on housing A, by stirring control piece 301, control the operating mode of actuator 300 (closure disconnects).

Handpiece 400 is connected with housing A, and is placed on the outside of actuator 300, and at this time, the protrusion of control piece 301 is set In the outside of handpiece 400, the outside of housing A is no longer arranged at, when person so easy to operation operates, control can be pressed at any time Part 301, controls the operating condition of device.Handpiece 400 further includes hand protecting cover 402, and protection hand is encountered or hurt.Hand protecting cover 402 are arranged on the outside of friction shell 401, and in hollow circular platform type, cross section is trapezoidal.

It should be noted that above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although reference The utility model is described in detail in preferred embodiment, it will be understood by those of ordinary skill in the art that, can be to this reality With new technical solution technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solutions of the utility model, It should all cover among the right of the utility model.

Claims (10)

1. A kind of 1. device for preventing that emery wheel from dropping with dismounting, it is characterised in that：Including,

   Active shaft member (100), its one end is connected with emery wheel, and active shaft member (100) rotation drives the emery wheel also to revolve together Turn, be ground cut substrate, its outside is equipped with housing (A), and the housing (A) is equipped with connecting hole (101)；And

   Protector (200), it includes extending neck (201), and the extension neck (201) is equipped with connection bump (201a), the company Meet raised (201a) to be engaged with the connecting hole (101) so that the protector (200) and the housing (A) are fixed.
2. 2. the device according to claim 1 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The protector (200) dust shield case (202) is further included, the dust shield case (202) is in hollow semi-annular, the inside of the dust shield case (202) Equipped with the first dust-leading board (202a) and the second dust-leading board (202b), first dust-leading board (202a) and the second dust-leading board (202b) The dust shield case (202) is divided into two relatively independent stone spaces (M) and leads dirt space (N)；

   Wherein, the angle of inclination of first dust-leading board (202a) is more than the angle of inclination of second dust-leading board (202b), and The intersection point of second dust-leading board (202b) and first dust-leading board (202a) is interior in the stone space (M), and two Person is not mutually closed, and cutting dirt is by the gap between the first dust-leading board (202a) and the second dust-leading board (202b), from emery wheel work Make space (M) entrance and lead dirt space (N), and be one-way movement.
3. 3. the device according to claim 2 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The protector (200) dust-collecting box (203) is further included, the dust-collecting box (203) is connected with the dust shield case (202),

   Wherein, the dust shield case (202) is equipped with first through hole (202c), and the dust-collecting box (203) is equipped with the second through hole (203a), the first through hole (202c) are connected and connect with second through hole (203a), and cutting dirt passes through described first Through hole (202c) and second through hole (203a), move in the dust-collecting box (203) from the dirt space (N) of leading.
4. 4. the device according to claim 3 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The dust-collecting box (203) upper end is equipped with strainer (203b), and the dust shield case (202) and the dust-collecting box (203) pass through the strainer (203b) Ventilation.
5. 5. the device according to claim 4 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The strainer (203b) It is detachable between the dust-collecting box (203).
6. 6. according to any device for preventing emery wheel from dropping with dismounting of claim 3~5, it is characterised in that：It is described anti- It is detachable between dirt box (202) and the dust-collecting box (203).
7. 7. the device according to claim 6 for preventing that emery wheel from dropping with dismounting, it is characterised in that：Further include, actuator (300), it is connected with the active shaft member (100), drives active shaft member (100) rotary motion, drives the emery wheel to transport Turn, including control piece (301), it protrudes the outside for being arranged on the housing (A).
8. 8. the device according to claim 7 for preventing that emery wheel from dropping with dismounting, it is characterised in that：Further include handpiece (400), it is connected with the housing (A), and is placed on the outside of the actuator (300), control piece (301) protrusion It is exterior to be arranged on the handpiece (400), including friction shell (401), the friction shell (401) they are in gear-like, when holding, hand is grabbed State friction shell (401) in residence.
9. 9. the device according to claim 8 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The handpiece (400) hand protecting cover (402) is further included, the hand protecting cover (402) is arranged on the outside of the friction shell (401), in hollow circle Bench-type, cross section are trapezoidal.
10. 10. the device according to claim 9 for preventing that emery wheel from dropping with dismounting, it is characterised in that：The handpiece (400) fastener (403) is further included, the fastener (403) is connected with the hand protecting cover (402), including retainer plate (403a) and locking member (403b)；

    Wherein, the retainer plate (403a) is equipped with two through holes, and the locking member (403b) includes bolt (403b-1) and spiral shell Female (403b-2), the bolt (403b-1) are existed through the through hole on the retainer plate (403a) with the nut (403b-2) The other end is fixed.