CN102233533A

CN102233533A - Sander

Info

Publication number: CN102233533A
Application number: CN201010158652XA
Authority: CN
Inventors: 何明明
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
Anticipated expiration: 2030-04-21
Also published as: CN102233533B

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 airflow generated by the fan passes through the hollow part and is blown to the surface of the workpiece, so that an air barrier, at least one part of which encircles the sanding plate, is formed between the curtain body and the surface of the workpiece. The sander can prevent dust from splashing and improve the dust absorption efficiency, and has a simple structure.

Description

Sander

Technical field

The present invention relates to a kind of sander, especially a kind of sander with dust guard.

Background technology

At present, sander is widely used in the polishing sanding on metope or ground.The motor of the driving force of providing is provided sander, and motor is connected to dynamic transfer system and is positioned within the shell of sander.Sander 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 sander 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 sander, 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 sander, 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 sander 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 a kind of sander that can prevent that dust from splashing.

Another object of the present invention is to provide the sander of the efficient dust suction of a kind of energy.

The present invention for the technical scheme that solution prior art problem is adopted is: a kind of sander 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 sander 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, the other end is towards surface of the work, the air communication that described fan produces is crossed hollow space and is blowed to surface of the work, thereby is formed up to the gas shield of small part around emery disc between curtain body and surface of the work.

Compared with prior art, beneficial effect of the present invention is: by being arranged on the curtain body on the sander, when using sander that surface of the work is polished, between curtain body and surface of the work, form gas shield, can play the effect that prevents that effectively dust from splashing, 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 output shaft and internal layer.

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

Preferably, described motor has output shaft, and described output shaft has axis, and described gas shield is parallel to the axis of output shaft.

Preferably, described hollow space includes oral area and export department, and described inlet portion is communicated with the fan fluid, and described export department is towards surface of the work, and described export department is with respect to the position-adjustable of emery disc.

Preferably, described emery disc has the bottom surface that connects sand paper, and described export department is to the distance of the bottom surface of the emery disc thickness greater than emery disc.

Preferably, described motor has output shaft, and described curtain body 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 export department is set, the operator can select the position of a suitable export department with respect to emery disc as required, and is very easy to use.

Preferably, be provided with the dust absorption fan that is used to collect dust between described fan and the emery disc, described emery disc is provided with first suction port, be provided with the inner space that is communicated with first suction port between described dust absorption fan and the emery disc, the position of the contiguous dust absorption fan of described casing is provided with the dust mouth, dust absorption fan by motor-driven so that dust after first suction port enters the inner space, can discharge from the dust mouth.

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

By being arranged on second suction port on the casing, the dust effective collection that is stopped by gas shield can have been improved dust collection efficiency.

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 sander partial cutaway schematic of the present invention.

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

Fig. 3 is the another kind of embodiment schematic diagram of sander 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

40. gas shield 41. outer 42. internal layers

43. hollow space 44. inlet portions 45. export departments

46. flexible region 60. gripper shoes 61. blades

62. 461. folding parts, dust exhausting fan 231. holes

W. workpiece

The specific embodiment

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

Please refer to shown in Figure 1, sander comprises casing 1 and is positioned at the emery disc 3 of casing 1 below, 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, it is X that output shaft 21 has axis, 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 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, 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 emery disc 3, blade 61 is towards motor 2, fan 6 is the air intake zone towards the end face direction of motor 2, the circumferential of fan 6 is the air-out zone, be positioned at fan 6 air-out regional locations on the casing 1 and be provided with opening 12, open 12 around fan 6, air enters from the space on casing 1 top that casing 1 is inner discharges from the opening 12 on the casing 1 by fan 6 through motor 2 backs, like this, the heat that produces during motor 2 work is taken away by air and is discharged to the sander outside through passing through fan 6, so fan 6 also can be called the cooling fan of motor 2.

Fan 6 also can be arranged on the top of motor, and air enters the space discharge of casing 1 inner process motor 2 backs from casing 1 top from the space of casing 1 bottom.Certainly, fan 6 also can be the dedicated fan that is not used in cooling motor that is provided with separately, and its position in casing 1 can be provided with as required.

Opening 12 places on the casing 1 are connected with curtain body 4, the circumferential setting of curtain body 4 to small part around casing 1, comprise 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 communicated with fan 6 air-out regional fluids, the other end is towards workpiece W surface, an end that is hollow space 43 contiguous fans 6 air-out zones is an inlet portion 44, end towards workpiece W surface is an export department 45, inlet portion 44 is connected opening 12 places of casing 1, the air-flow of discharging from fan 6 is discharged from export department 45 by hollow space 43 from inlet portion 44 backs that opening 12 enters curtain body 4 again like this, export department 45 is arranged between the bottom surface 31 of the opening 12 of casing 1 and emery disc 3, using sander when polishing in workpiece W surface like this, the air-flow of discharging from the export department 45 of hollow space 43 blows to workpiece W surface, thereby between export department 45 and workpiece W surface, be formed up to the gas shield 40 of small part around emery disc 3, the dust of overflowing from emery disc 3 slit on every side in the time of sander work is stopped that by gas shield 40 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 sander contiguous operator's position, and the dust of the slit effusion when can guarantee sander 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 gas shield 40 like this, stop that effectively dust splashes between 360 degree.Preferred curtain body 4 be shaped as the skirt shape so that sander seems more attractive in appearance.

The export department 45 of curtain body 4 hollow spaces 43 is towards workpiece W surface, air-flow through hollow space 43 blows to the axis X that the surperficial gas shield 40 that forms of workpiece W is roughly parallel to output shaft 21 under the guide effect of export department 45, gas shield 40 is the shortest along the axial distance of output shaft 21 like this, thereby reduced windage loss, also made 40 more effective stopping of gas shield from the dust of emery disc 3 slit effusion on every side.Export department 45, could guarantee to form effective gas shield between export department 45 and surface of the work at least greater than the thickness of emery disc 3 to the distance of the bottom surface 31 of emery disc 3 like this, does not influence the circulation of air simultaneously again.

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 air-flow that sander in use discharges from fan 6 hollow space 43 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 is by opening 12 corresponding are connected casing 1 on of inlet portion 44 with casing 1, and when being wholely set, it can be connected on the casing 1 by using adhesive or hot melt etc. mode being non-removable; Divide when being arranged, can be connected 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, on 231 casings 1 between emery disc 3 and fan 6 and the position of contiguous fan 6 be provided with dust mouth 11, the dust that produces during work can enter inner space 7 from first suction port 33 and arrive fans 6 backs by the hole on the connector 23 231 and 11 discharge from the dust mouth.

The arrow B indication be second dust absorption passage, 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 sander inner air and outer air.The dust of overflowing on every side from emery disc 3 during work can enter inner space 7 from second suction port 13 and arrive 11 discharges from the dust mouth of fans 6 backs.

Dust mouth 11 can connect a dust collect plant that is used to collect dust, and the dust collect plant here is a dust catcher.The dust that produces when sander 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 catcher, like this, dust just has been discharged from the sander outside.

If dust catcher is not set, the dust absorption fan 62 that is driven by motor 2 can be set between fan 6 and emery disc 3 so, inner space 7 is arranged between emery disc 33 and the dust absorption fan 62, fan 6 and dust absorption fan 62 can divide and be arranged, but also integral type setting, being that fan 6 upper and lower surfaces all have fan blade, is dust absorption fan 62 towards the one side of emery disc 3, is the cooling fan 6 of cooling motor towards the one side of motor 2.During work, dust absorption fan 62 is driven and produces wind-force by motor 2, the dust that the effect of wind-force produces when making work sucks and 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, and the dust collect plant here is a dust-collecting box.Like this, dust just has been discharged from the sander outside.

When using sander that surface of the work is polished, a dust part that produces is entering dust collect plant under the effect of dust catcher or dust exhausting fan 62 after first suction port 33 enters inner space 7, a part of dust is stopped by the gas shield 40 that the air-flow of discharging from hollow space 43 forms from emery disc 3 effusion on every side simultaneously, dust is blocked between curtain body 4 and gas shield 40 and the casing 1, a part flowed to casing 1 after the air-flow of discharging from hollow space 43 arrived working surface, and gas can be with dust enters dust collect plant 5 after second suction port 13 from the casing 1 enters inner space 7 together like this.Like this, come under the prerequisite of dust suction at utilize dust catcher or the dust absorption fan 62 that do not influence script, the gas shield 40 that the air-flow that dust is discharged by fan 6 forms stops, prevented that dust is splashed to the outside of sander, the dust of this part effusion simultaneously is again by effective collection, and it is do not influence the circulation of air again, thereby improved the pick-up performance of sander, and simple in structure.

With reference to Fig. 3, export department 45 also can be adjustable with respect to the position of emery disc 3, curtain body 4 is provided with the flexible region 46 that one or more is connected and composed along folding direction from beginning to end by folding part 461 along motor 2 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, like this curtain body 4 can be operated the bending or along motor 2 axial elongations, blowing to the gas shield 40 that surface of the work forms through the air-flow of hollow space 43 under the guide effect of export department 45 like this can be vertical also can tilting with respect to surface of the work, and the operator can select the position of a suitable export department 45 with respect to emery disc 3 when the use sander so.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 protection scope of the present invention.

Claims

1. sander 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 sander 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, the air communication that described fan (6) produces is crossed hollow space (43) and is blowed to surface of the work, thereby is formed up to the gas shield (40) of small part around emery disc (3) between curtain body (4) and surface of the work.

2. sander 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 output shaft (21) (41) and internal layer (42), described hollow space (43) is positioned between skin (41) and the internal layer (42).

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

4. sander according to claim 1 is characterized in that: described motor (2) has output shaft (21), and described output shaft (21) has axis, and described gas shield (40) is parallel to the axis of output shaft (21).

5. sander according to claim 1, it is characterized in that: described hollow space (43) includes oral area (44) and export department (45), described inlet portion (44) is communicated with fan (6) fluid, described export department (45) is towards surface of the work, and described export department (45) is with respect to the position-adjustable of emery disc (3).

6. sander according to claim 5 is characterized in that: described emery disc (3) has connection sand paper (32) bottom surface (31), and described export department (45) is to the distance of the bottom surface (31) of emery disc (3) thickness greater than emery disc (3).

7. sander according to claim 5 is characterized in that: described motor (2) has output shaft (21), and described curtain body (4) is provided with flexible region (46) along the axial middle part of output shaft (21).

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

9. according to one of them described sander of claim 2 to 8, it is characterized in that: be provided with dust absorption fan (62) between described fan (6) and the emery disc (3), 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 dust absorption fan (62) and the emery disc (3), the position of the contiguous dust absorption fan of described casing (1) (62) is provided with dust mouth (11), and dust absorption fan (62) is driven by motor (2) so that dust enters (11) discharge from the dust mouth of back, inner space (7) from first suction port (33).

10. sander according to claim 9 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).