CN102233532A

CN102233532A - Sander

Info

Publication number: CN102233532A
Application number: CN2010101586426A
Authority: CN
Inventors: 钟红风
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2010-04-21
Filing date: 2010-04-21
Publication date: 2011-11-09

Abstract

The invention discloses a sander, which comprises a shell, a motor, a fan, a sanding plate and a curtain body, wherein the motor is accommodated in the shell; the fan is driven by the motor to generate airflow; the sanding plate is arranged below the shell and driven by the motor to polish the surface of a workpiece; and the curtain body is connected to the shell and extends along the circumferential direction of the shell, the curtain body is provided with a hollow part, one end of the hollow part is communicated with the fluid of the fan, the other end of the hollow part faces the surface of the workpiece, and the air enters the fan from the hollow part under the action of the fan and is discharged. The sander can prevent dust from splashing and improve the dust absorption efficiency, and has a simple structure.

Description

Skin grinder

Technical field

The present invention relates to a kind of skin grinder, especially a kind of skin grinder with dust exhaust apparatus.

Background technology

At present, skin grinder is widely used in the polishing sanding on metope or ground.The motor of the driving force of providing is provided skin grinder, and motor is connected to dynamic transfer system and is positioned within the shell of skin grinder.Skin grinder also has the work chassis, and motor is connected with the work chassis by dynamic transfer system, is pasted with abrasive material such as sand paper in the bottom surface on work chassis.During work, axial rotation is made around one in the motor-driven chassis, and the sand paper of attaching will correspondingly rotate, and the surface of the work that polish is polished, thereby make it smooth smooth.

Yet in the bruting process of reality, polishing can produce a large amount of dust when contacting to sand paper with surface of the work, and these dust are thrown out of the external world along with the high speed rotating on work chassis, and therefore the dust that splashes can influence operator's sight line, reduces operating efficiency.What is more, in a large amount of dust persons' of being operated the respiratory system suction body, influences operator's health, and its health is caused very big harmfulness.So present skin grinder generally all can be provided with dust collecting system.Dust collecting system comprises fan, dust absorption passage and dust bag.Fan is arranged at the inside of skin grinder, its effect is to rotate formation air-flow drive dust by fan to move to a certain direction, design the access portal that several contact with the polishing surface on the chassis of skin grinder, these access portal connect an end of dust absorption passage, the other end of dust absorption passage connects the dust bag of peripheral hardware, fan rotates, and the dust that produces during with work sucks dust absorption passage and enters dust bag at last.Operation finishes the unified processing of dust.

But such dust suction mode also has shortcoming.Although most dust can be siphoned away by above-mentioned dust collecting system, there be the slit of part dust around can be from the chassis to overflow, the operator is impacted.To this, disclose a kind of improvement means as U.S. Pat 4381628 and US4616449.The baffle plate of annular is set on the skin grinder shell of work chassis periphery, and baffle plate can effectively block the dust that outwards sputters.But baffle plate has also blocked air simultaneously and has entered dust absorption passage from the external world, influences circulation of air, reduces the dust collection efficiency of knowing clearly on the whole, and actual pick-up performance situation is unsatisfactory.

Summary of the invention

The object of the present invention is to provide the skin grinder of the efficient dust suction of a kind of energy.

Another object of the present invention is to provide a kind of skin grinder that can prevent that dust from splashing.

The present invention for the technical scheme that solution prior art problem is adopted is: a kind of skin grinder comprises: casing; Be contained in the motor in the described casing; Produce the fan of air-flow by described motor-driven; Be arranged at the emery disc of casing below by motor-driven buffing work-piece surface; Described skin grinder also comprises the curtain body along the circumferential extension of casing that is connected on the casing, described curtain body has hollow space, one end of described hollow space is communicated with the fan fluid, and the other end is towards surface of the work, and air is discharged after hollow space enters fan under the effect of fan.

Compared with prior art, beneficial effect of the present invention is: by being arranged on the curtain body on the skin grinder, the dust of overflowing when using skin grinder that surface of the work is polished is stopped by the curtain body, simultaneously dust enters along with air behind the hollow space of curtain body by effective collection, play the effect that prevents that effectively dust from splashing and improving dust collection efficiency, and simple in structure.

Preferably, described motor has output shaft, described curtain body to small part around the casing setting, described curtain body comprises that described hollow space is between skin and internal layer along radially-arranged skin of motor output shaft and internal layer.

Preferably, described emery disc has the bottom surface, and described skin has first bottom, and described internal layer has second bottom, and the distance of emery disc bottom surface is arrived in described first bottom less than described second bottom to the distance of emery disc bottom surface.

Preferably, dismountable being connected on the casing of described curtain body.

Preferably, described hollow space comprises upper shed portion and under shed portion, and described upper shed portion is communicated with the fan fluid and is positioned at casing, and described under shed portion is towards surface of the work, and described under shed portion is with respect to the position-adjustable of emery disc.

Preferably, described motor has output shaft, and described curtain body is positioned at the outer part of casing and is provided with flexible region along the axial middle part of output shaft.

Preferably, described flexible region is connected to form by plurality of portable radicals by which characters are arranged in traditional Chinese dictionaries tail.

By adjustable under shed portion is set, the operator can select the position of a suitable under shed portion with respect to emery disc as required, and is very easy to use.

Preferably, described emery disc is provided with first suction port, be provided with the inner space that is communicated with first suction port between described fan and the emery disc, the air outlet position of the contiguous fan of described casing is provided with the dust mouth, and dust is being discharged from the dust mouth after first suction port enters the inner space under the effect of fan.

Preferably, the position near emery disc is provided with second suction port, described second suction port and described dust suction inner space on the described casing.

Preferably, described dust mouth is equipped with dust collect plant, the dust of overflowing around the emery disc during work of described skin grinder enters hollow space by described under shed portion under the effect of fan, and after described upper shed portion arrives fan, discharge, be collected in the described dust collect plant through behind the described dust mouth again.

Description of drawings

Above-described purpose of the present invention, technical scheme and beneficial effect can be described and clearly acquisition simultaneously in conjunction with the accompanying drawings by the following detailed description that can realize specific embodiments of the invention.

Identical label in accompanying drawing and the specification is used to represent element identical or that be equal to symbol.

Fig. 1 is a skin grinder partial cutaway schematic of the present invention.

Fig. 2 is the phantom of skin grinder of the present invention along A-A line among Fig. 1.

Fig. 3 is the another kind of embodiment schematic diagram of skin grinder of the present invention.

Wherein,

1. casing 2. motors 3. emery discs

4. curtain body 6. fans 7. dust absorption passages

11. dust mouth 12. openings, 13. second suction ports

21. output shaft 23. connectors 25. first eccentric shafts

26. second eccentric shaft, 31. bottom surfaces, 32. sand paper

33. first suction port, 35. first emery discs, 36. second emery discs

41. outer 42. internal layers, 43. hollow spaces

44. 45. under shed portions of upper shed portion, 46. flexible regions

60. gripper shoe 61. blades 62. cooling fans

231. 421. second bottoms, 411. first bottoms, hole

461. folding part W. workpiece

The specific embodiment

The present invention has come out with a kind of skin grinder, now describes with specific embodiment.

Please refer to shown in Figure 1ly, skin grinder comprises casing 1 and is positioned at the emery disc 3 of casing 1 below that casing 1 inside is provided with motor 2, motor 2 drives the surface of emery disc 3 with buffing work-piece W, motor 2 has output shaft 21, and fan 6 is installed on the output shaft 21, and fan 6 can produce air-flow under the driving of motor 2.

Emery disc 3 has a bottom surface 31, and bottom surface 31 is pasted with removable sand paper 32.During work, the sanding of polishing of sand paper 32 acts on workpiece W under the driving of emery disc 3 surface is handled, and produces a large amount of dust simultaneously.

Fan 6 is arranged between motor 2 and the emery disc 3, the dust that produces when being used to collect skin grinder work.Fan 6 is common turbofan, have gripper shoe 60 and be arranged at several blades 61 on the gripper shoe, the gripper shoe 60 of fan 6 is towards motor 2, and blade 61 is towards emery disc 3, fan 6 is the air intake zone towards the end face direction of emery disc 3, and the circumferencial direction of fan 6 is the air-out zone.On the casing 1 between fan 6 and emery disc 3 and around casing 1 be circumferentially with opening 12, curtain body 4 passes the opening 12 on the casing 1 and extend into the below that is positioned at fan 6 in the casing 1, curtain body 4 is communicated with the air intake regional fluid of fan 6 like this.Curtain body 4 circumferentially extends and 1 setting to small part around casing along casing 1, curtain body 4 comprise be provided with around casing 1 to small part and along motor 2 output shaft 21 radially-arranged outer 41 and internal layers 42, form hollow space 43 between skin 41 and the internal layer 42, one end of hollow space 43 is that upper shed portion 44 is communicated with fan 6 air intake regional fluids, the other end be under shed portion 45 towards workpiece W surface, air is discharged from the air-out zone of fan 6 after being entered hollow space 43 under the effect of fan 6 by under shed portion 45 and arriving fans 6 air intake zones from upper shed portion 44.

The skin 41 of curtain body 4 has first bottom 411, internal layer 42 has second bottom 421, the thickness of the distance of emery disc 3 bottom surfaces 31 less than emery disc 3 is arrived in first bottom 411 or second bottom 421, and the distance of emery disc 3 bottom surfaces 31 is arrived less than the distance of second bottom 421 to emery disc 3 bottom surfaces 31 in first bottom 411, and promptly first bottom 411 and second bottom 421 have height difference H.Using skin grinder in workpiece W surface finish like this, the dust of overflowing from emery disc 3 slit on every side in the time of skin grinder work is stopped by the skin 41 of curtain body 4, dust enters the under shed portion 45 of curtain body 4 along with air, discharge from the air-out zone of fan 6 behind the air intake zone of upper shed portion 44 arrival fans 6 by hollow space 43, dust just can not exert an influence to environment and operator like this.

Curtain body 4 is circumferentially spent more than or equal to 180 around the angular range of casing 1 at least along casing 1, and curtain body 4 is positioned on the skin grinder contiguous operator's position, and the dust of the slit effusion when can guarantee skin grinder work so at least around the emery disc 3 can not exert an influence to the operator.Certainly be preferably in 270 and spend, could form wider barrier like this, stop that effectively dust splashes and collects dust between 360 degree.Preferred curtain body 4 be shaped as the skirt shape so that skin grinder seems more attractive in appearance.

The thickness of the skin 41 of curtain body 4 and the thickness of internal layer 42 and casing 1 is roughly suitable, perhaps less than the thickness of casing 1, and if outer 41 and the thickness of internal layer 42 satisfy skin grinder in use the air outside band the hollow space 43 of dust via curtain body 4, outer 41 and internal layer 42 under the effect of air-flow, can not produce stress deformation and get final product.Curtain body 4 can be arranged to one with casing 1, also can divide to be arranged.Curtain body 4 extend into casing 1 inside by the opening 12 of casing 1, and when being wholely set, it can be by using on the non-removable openings 12 that are connected on the casing 1 of technology mode such as adhesive or hot melt; Divide when being arranged, can be connected on the opening 12 on the casing 1 by the known dismountable connected mode of those skilled in the art such as screw, buckle.

With reference to Fig. 2, emery disc 3 comprises first emery disc 35 that is driven by first eccentric shaft 25 that is connected on the output shaft 21, and by second emery disc 36 that is connected second eccentric shaft, 26 drivings on the output shaft 21, first emery disc 35 connects by a connection piece 23 and first eccentric shaft 25, connector 23 is provided with between several holes 231, the first emery discs 35 and second emery disc 36 and is provided with first suction port 33.Shown in Figure 2 is a kind of double plate sander, common sander has a shaft-driven emery disc of an off-centre that is connected on the output shaft 21, the bottom surface 31 of emery disc is provided with first suction port, 33, the first suction ports 33 several, and penetrates emery disc 3 along the direction perpendicular to emery disc 3 bottom surfaces 31.

The arrow A indication be first dust absorption passage, first suction port 33 is close to surface of the work, the dust that suck to produce when being convenient to work.Be provided with inner space 7 between emery disc 3 and the fan 6, hole on the connector 23 makes inner space 7 form the space that a fluid is communicated with, first suction port 33 and inner space 7 are communicated with, be provided with dust mouth 11 in the air-out zone of contiguous fan 6 on the casing 1, the dust that produces during work can enter inner space 7 from first suction port 33 and arrive 11 discharges from the dust mouth of fan 6 backs by the hole on the connector 23 231.

The arrow B indication be second dust absorption passage, promptly on the casing 1 and near emery disc 3 places be provided with second suction port, 13, the second suction ports 13 that are communicated with inner space 7 be communicated with simultaneously the external world, play the circulation effect of skin grinder inner air and outer air.The dust of overflowing on every side from emery disc 3 during work can enter 11 discharges from the dust mouth of 7 backs, inner space from second suction port 13.

Dust mouth 11 can connect a dust collect plant that is used to collect dust, and the dust collect plant here is dust catcher or dust-collecting box.The dust that produces when skin grinder is worked like this enters inner space 7 from first suction port 33 or second suction port 13, second suction port 13 provides simultaneously from first suction port 33 or second suction port 13 and siphons away the necessary air of dust, dust is by inner space 7, the back is 11 discharges from the dust mouth, thereby enter dust collect plant, in addition, the dust that enters into fan 6 air intake regions from the hollow space 43 of curtain body 4 also 11 is discharged and is entered dust collect plant from the dust mouth under the effect of fan 6, like this, dust just has been discharged from the skin grinder outside.

Be provided with cooling fan 61 between fan 6 and the motor 2, fan 6 and cooling fan 61 can be one-body molded, also can divide to be arranged.Air enters from the space on casing 1 top that casing 1 is inner discharges from the slit on the casing 1 by cooling fan 61 through motor 2 backs, and like this, the heat that produces during motor 2 work is taken away by air and is discharged to the skin grinder outside through cooling fan 61.

When using skin grinder that surface of the work is polished, a dust part that produces is entering dust collect plant 5 under the effect of dust catcher or fan 6 after first suction port 33 enters inner space 7, a part of dust is overflowed on every side from emery disc 3 and is stopped by curtain body 4 simultaneously, dust is blocked between curtain body 4 and the casing 1, air can enter hollow space 43 and discharges from upper shed portion 44 from the under shed portion 45 of curtain body 4 together under the effect of fan 6 with dust, and under the effect of fan 6,11 enter dust collect plant, i.e. the 3rd dust absorption passage of arrow C indication from the dust mouth.Like this, come under the prerequisite of dust suction at the fan 6 that utilizes that does not influence script, dust is stopped by curtain body 4, prevented that dust is splashed to the outside of skin grinder, the dust of this part effusion simultaneously passes through the hollow space 43 of curtain body 4 again by effective collection, and it is do not influence the circulation of air, thereby improved the pick-up performance of skin grinder, and simple in structure.

With reference to Fig. 3, be the another kind of embodiment schematic diagram of skin grinder of the present invention.The under shed portion 45 of curtain body 4 is adjustable with respect to the position of emery disc 3, curtain body 4 be positioned at casing 1 outer be provided with the flexible region 46 that one or more is connected to form along folding direction from beginning to end by folding part 461 along output shaft 21 axial middle parts, the bending part of common suction pipe in the folding part 461 similar lives here, be that folding part 461 is the ripple lying fold, overlapping recessed in other words conj.or perhaps lying fold, curtain body 4 can be operated bending or along motor 2 axial elongations, the operator can select the position of a suitable under shed portion 45 with respect to emery disc 3 according to working condition when using skin grinder so like this.Certainly the flexible region 46 of curtain body 4 also can be to be made of other known structures of those skilled in the art, such as plastic with plasticity, bent sheet metal or the like.

The above embodiments only are the most preferred embodiments that provides in order to allow those skilled in the art understand the present invention.The present invention is not limited in above-mentioned specific embodiment.Any those skilled in the art easily full of beard and improvement all within inventive concept of the present invention.

Claims

1. skin grinder comprises:

Casing (1);

Motor (2) is contained in the described casing (1);

Fan (6) drives the generation air-flow by described motor (2);

Emery disc (3) is arranged at casing (1) below and drives the buffing work-piece surface by motor (2);

It is characterized in that: described skin grinder also comprises the curtain body (4) along the circumferential extension of casing (1) that is connected on the casing (1), described curtain body (4) has hollow space (43), one end of described hollow space (43) is communicated with fan (6) fluid, the other end is towards surface of the work, and air enters fan (6) back from hollow space (43) and discharges under the effect of fan (6).

2. skin grinder according to claim 1, it is characterized in that: described motor (2) has output shaft (21), described curtain body (4) to small part is provided with around casing (1), described curtain body (4) comprises that along radially-arranged skin of motor (2) output shaft (21) (41) and internal layer (42), described hollow space (43) is positioned between skin (41) and the internal layer (42).

3. skin grinder according to claim 2, it is characterized in that: described emery disc (3) has bottom surface (31), described skin (41) has first bottom (411), described internal layer (42) has second bottom (421), and the distance of emery disc (3) bottom surface (31) is arrived in described first bottom (411) less than described second bottom (421) to the distance of emery disc (3) bottom surface (31).

4. skin grinder according to claim 1 is characterized in that: described curtain body (4) is dismountable to be connected on the casing (1).

5. skin grinder according to claim 1, it is characterized in that: described hollow space (43) comprises upper shed portion (44) and under shed portion (45), described upper shed portion (44) is communicated with fan (6) fluid and is positioned at casing (1), described under shed portion (45) is towards surface of the work, and described under shed portion (45) is with respect to the position-adjustable of emery disc (3).

6. skin grinder according to claim 5 is characterized in that: described motor (2) has output shaft (21), and described curtain body (4) is positioned at the outer part of casing and is provided with flexible region (46) along the axial middle part of output shaft (21).

7. skin grinder according to claim 6 is characterized in that: described flexible region (46) is connected to form by plurality of portable portion (461) head and the tail.

8. according to one of them described skin grinder of claim 2 to 7, it is characterized in that: described emery disc (3) is provided with first suction port (33), be provided with the inner space (7) that is communicated with first suction port (33) between described fan (6) and the emery disc (3), the circumferential position of the contiguous fan of described casing (1) (6) is provided with dust mouth (11), and dust enters (11) discharge from the dust mouth of back, inner space (7) from first suction port (33) under the effect of fan (6).

9. skin grinder according to claim 8 is characterized in that: the position that described casing (1) is gone up near emery disc (3) is provided with second suction port (13), and described second suction port (13) is communicated with described inner space (7).

10. skin grinder according to claim 8, it is characterized in that: described dust mouth (11) are equipped with dust collect plant, the dust of overflowing on every side from emery disc (3) when described skin grinder is worked can enter hollow space (43) by described under shed portion (45) under the effect of fan (6), and arrive fan (6) back from described upper shed portion (44) and discharge, be collected in the described dust collect plant after passing through described dust mouth (11) again.