CN102601712A - Dust collection adapter and power tool including dust collection adapter - Google Patents

Abstract

To a power tool main body to which a main body spindle rotationally driving a tip tool is provided, a dust collection adapter for collecting dusts generated when a material to be ground is processed by the tip tool is held thereto. The dust collection adapter includes: a dust collection fan rotationally driven by the main body spindle; and a dust collection cover for containing the dust collection fan and covering a diametrical outside of the tip tool. The dust collection fan includes: a fan main body to which a plurality of blade portions are provided; and a threaded shaft portion provided to a center portion of the fan main body. To the threaded shaft portion, a female thread portion thread-coupled to the main body spindle and a male thread portion thread-coupled to a fastening thread member for fixing the tip tool are provided.

Description

Control of dust adapter and the electric tool that comprises the control of dust adapter

The cross reference of related application

The priority of submit on January 20th, 2011-077341 number 1 of submitting on March 31st, 2011-008439 number 1 of submitting on January 19th, 2011-073801 number 1 that the application requires to submit on March 30th, 2011 2011-009386 number and the 2011-207278 Japanese patent application submitted on September 22nd, 2011, its content is incorporated among the application by reference.

Technical field

The present invention relates to a kind ofly material to be ground carried out the electric tool such as disk grinder of attrition process, also relate to a kind of remaining on the electric tool to collect the control of dust adapter of the dust that produces in the process through end-of-arm tooling.

Background technology

Drive end-of-arm tooling as disk grinder of electric tool etc. rotatably through power supply, handle processing with the surface of treating material processed such as grindstone.In order to drive end-of-arm tooling rotatably through motor or air operated machine, carry out milled processed with surface at material to be processed, use disk grinder.As end-of-arm tooling plate-like grinding stone, diamond cutter, cup-shaped grinding stone, wire brush etc. are arranged, therefrom select end-of-arm tooling arbitrarily based on material type to be ground.For example, for the material surface such as concrete or stone material to be processed is carried out milled processed, select diamond cutter, and attrition process is carried out on the surface through electric tool as end-of-arm tooling.Treat the electric tool that carries out attrition process in the material processed surface through end-of-arm tooling and be also referred to as " disc sanding machine " or " polishing machine ".

Carry out the electric tool such as disk grinder or disc sanding machine of attrition process through end-of-arm tooling, have the dust collection type that comprises the control of dust adapter, add the dust that produces man-hour through dust collection type and can not spread to the outside.For example; Patent documentation 1 (publication number is the Japanese patent application of 2009-138203) and patent documentation 2 (publication number is the Japanese Utility Model patent application of S55-103143) have been described a kind of like this disc sanding machine, and it is configured to make dustproof brush to remain to the opening portion of dust collection cover.The inside of the dust collection cover of in patent documentation 3 (publication number is the Japanese patent application of 2009-23005), describing provides to be used for the guiding elements of dust guiding to discharge line.The inside of the dust collection cover of the electric tool of describing at patent documentation 1 provides the control of dust fan that is used to suck dust and dust is offered discharge line.The control of dust adapter is formed by control of dust fan and dust collection cover, and the control of dust fan remains on the rotating shaft that is used to drive end-of-arm tooling, and dust collection cover is used to hide the control of dust fan.

Summary of the invention

Electric tool such as disk grinder or disc sanding machine has: comprise the dust collection type of maintenance dust collection cover above that and do not comprise the general simple type of dust collection cover.Randomly, the electric tool of simple type has the structure that the control of dust adapter can be connected to power tool body, obtains this control of dust adapter through assembling control of dust fan with the dust cap that is contained in the control of dust fan.In simple type, be used to drive rotating shaft such as the end-of-arm tooling of grinding stone and have and make end-of-arm tooling be directly connected to the length in the rotating shaft.Therefore, when control of dust fan and dust collection cover were connected on the electric tool of simple type, the length of rotating shaft was not enough, and this produces difficulty endways during the connection of instrument.

In order to make the simple type electric tool become the dust-protection type electric tool, be not arranged on the rotating shaft on the simple type electric tool before and do not dismantle, promptly do not dismantle the main body rotating shaft, need and will be coupled to the end of main body rotating shaft as the threaded shaft member of extending rotating shaft.Be coupled in the main body rotating shaft in order to extend rotating shaft, the female thread portion of screw thread couple to the male thread portion of main body rotating shaft be set at the bottom part that extends rotating shaft.And, in order end-of-arm tooling to be connected to the end portion of extending rotating shaft, be set to the end that extends rotating shaft with the male thread portion of the lock nut screw thread couple that is used for fastening end-of-arm tooling.

On the other hand; When end-of-arm tooling is connected to the main body rotating shaft and separates from the main body rotating shaft when being used to change end-of-arm tooling; That is to say and combine with the main body rotating shaft and when the main body rotating shaft separated, the locking press button of operation setting on power tool body was with the rotating shaft of locking main body, in order to avoid rotate the main body rotating shaft.Therefore, when changing end-of-arm tooling, the staff with a hand operated locking press button with the stationary body rotating shaft in, the staff can with the another hand rotationally the operational lock nut so that end-of-arm tooling is fastened in the main body rotating shaft.

But, be connected to the end-of-arm tooling that extends rotating shaft in order to change, if try to unclamp the lock nut that has been fastened to end-of-arm tooling; Stop the rotation of main body rotating shaft simultaneously through locking press button; Lock nut is not rotated with respect to extending rotating shaft so, and lock nut with extend rotating shaft and rotate together, therefore; Can unclamp in the screw thread couple part of extending between rotating shaft and the main body rotating shaft, this will make that they are separated from one another.

Unclamp and separate if will extend rotating shaft, occur extending rotating shaft and end-of-arm tooling state fixed to one another so from the main body rotating shaft, therefore, another work that need end-of-arm tooling be separated from the extension rotating shaft, the workability when changing instrument like this is very poor.

Preferred purpose of the present invention provides a kind of control of dust adapter and comprises the electric tool of this control of dust adapter, even can utilize the structure that dust collection function is provided to the general electric tool body, will be connected to such as the end-of-arm tooling of emery wheel on this control of dust adapter.

Another preferred purpose of the present invention provides a kind of control of dust adapter and the electric tool that comprises the control of dust adapter, and this control of dust adapter can improve with respect to power tool body and change the workability such as the end-of-arm tooling of emery wheel.

A viewpoint of the present invention is that the control of dust adapter is connected on the power tool body, and collects the dust that when the end-of-arm tooling that drives rotationally through the main body rotating shaft by power tool body is processed material to be ground, is produced.The control of dust adapter is set; So that the control of dust adapter comprises: the control of dust fan that drives rotationally by the main body rotating shaft, and dust collection cover, dust collection cover remains on the power tool body to hold the control of dust fan therein; Dust collection cover hides the radially outer of end-of-arm tooling; The control of dust fan comprises: have the fan main body of a plurality of blades, and threaded shank portion, threaded shank portion is set on the radial center part of fan main body; And in threaded shank portion, form the female thread portion of screw thread couple to the male thread portion of main body rotating shaft, screw thread couple is arranged on the end of threaded shank portion to the male thread portion that is used for fixing end-of-arm tooling.

Another viewpoint of the present invention is that electric tool carries out attrition process through end-of-arm tooling to material to be ground.Electric tool is set; So that electric tool comprises: the control of dust fan and the dust collection cover that are provided with the power tool body of the main body rotating shaft that is used for driving rotationally end-of-arm tooling, drive rotationally by the main body rotating shaft; Dust collection cover remains on the power tool body to hold the control of dust fan therein; Dust collection cover hides the radially outer of end-of-arm tooling; The control of dust fan comprises: have the fan main body and the threaded shank portion of a plurality of blades, threaded shank portion is set on the radial center part of fan main body, in threaded shank portion, is formed with the female thread portion of screw thread couple to the male thread portion of main body rotating shaft; And in threaded shank portion, be provided with the male thread portion of screw thread couple to the clamp structure that is used for fixing end-of-arm tooling, the dust that when processing material to be ground, produces is inhaled in the dust collection cover.

The threaded shank portion that is connected with main body rotating shaft on being arranged on power tool body is arranged on the fan main body of control of dust fan, is arranged on this threaded shank portion with the male thread portion of the clamp structure screw thread couple that is used for fixing end-of-arm tooling.Therefore, when dust collection function being offered the general electric tool body that dust collection cover is not set, control of dust fan and dust collection cover can remain to the main body rotating shaft, and need not change the main body rotating shaft.

When rotating with the male thread portion screw thread couple of threaded shank portion with the clamp structure of fastening end-of-arm tooling; Connect/separately anchor clamps are meshed with the rotation restrictor branch of threaded shank portion; Clamp structure is connected/separates anchor clamps and is meshed with another, so that clamp structure can easily rotate with respect to threaded shank portion.By this way, connect/when separating, promptly when changing end-of-arm tooling, can easily clamp structure be separated from threaded shank portion with respect to threaded shank portion, therefore, can improve the workability when changing end-of-arm tooling at clamp structure.

Description of drawings

Fig. 1 is illustrated in the front view that the part that is used as the disk grinder of electric tool in the state that maintains the control of dust adapter is cut open;

Fig. 2 is the amplification view of the major part of Fig. 1;

Fig. 3 is the amplification view that disk grinder in the state of removing the control of dust adapter is shown;

Fig. 4 illustrates the cutaway view of removing the operation of control of dust adapter from disk grinder;

Fig. 5 is the bottom view of Fig. 4;

Fig. 6 is the exploded view that the control of dust adapter that separates with disk grinder is shown;

Fig. 7 A is the amplification front view that the end portion of main body rotating shaft is shown;

Fig. 7 B illustrates the amplification view that extends the rotating shaft part;

Fig. 8 A is the front view that the improvement embodiment that extends the rotating shaft part is shown;

Fig. 8 B is the right view of Fig. 8 A;

Fig. 9 A is the front view that another improvement embodiment that extends the rotating shaft part is shown;

Fig. 9 B is the right view of Fig. 9 A;

Figure 10 A is the front view that the another improvement embodiment that extends the rotating shaft part is shown;

Figure 10 B is the right view of Figure 10 A;

Figure 11 A is the front view that the another improvement embodiment that extends the rotating shaft part is shown;

Figure 11 B is the right view of Figure 11 A;

Figure 12 A is the front view that the another improvement embodiment that extends the rotating shaft part is shown;

Figure 12 B is the right view of Figure 12 A;

Figure 13 A is the front view that the another improvement embodiment that extends the rotating shaft part is shown;

Figure 13 B is the right view of Figure 13 A;

Figure 14 illustrates the cutaway view that keeps as the disk grinder in the state of the control of dust adapter that improves embodiment;

Figure 15 is the exploded view that the control of dust adapter that separates with disk grinder shown in Figure 14 is shown;

Figure 16 is the cutaway view that the control of dust adapter with reticular component is shown;

Figure 17 is the bottom view that the disk grinder that maintains control of dust adapter shown in Figure 16 is shown;

Figure 18 is the stereogram of disk sander shown in Figure 17;

Figure 19 is the cutaway view that leaf spring shown in Figure 16 and guide member inclination angle along the circumferential direction are shown;

Figure 20 is the amplification view that obtains along the line 20-20 among Figure 17;

Figure 21 illustrates to maintain the bottom view of disk grinder of improving the control of dust adapter of embodiment as another;

Figure 22 illustrates the bottom view that maintains as the disk grinder of the control of dust adapter of another improvement embodiment; Figure 23 illustrates the fragmentary cross-sectional view that maintains as the disk grinder of the control of dust adapter of another improvement embodiment;

Figure 24 is the bottom view of Figure 23;

Figure 25 is the enlarged side view that is illustrated in the engaging groove that forms in the keeper;

Figure 26 is the exploded perspective view that keeper and connected skirt shape member are shown;

Figure 27 is the amplification view that keeper and connected skirt shape member are shown;

Figure 28 A is the amplification front view that is illustrated in the part of skirt shape member and dust collection cover in the state that skirt shape member bumps against exotic;

Figure 28 B is the sectional view that skirt shape member in the state that skirt shape member bumps against exotic is shown;

Figure 29 A is the bottom view that illustrates as the part of the skirt shape member that improves embodiment;

Figure 29 B is the cutaway view that obtains along the line 29B-29B among Figure 29 A;

Figure 30 A illustrates the bottom view of a part of improving the skirt shape member of embodiment as another;

Figure 30 B is the cutaway view that obtains along the line 30B-30B among Figure 30 A;

Figure 31 is the amplification front view that illustrates as the part of skirt shape member that improves embodiment and dust collection cover;

Figure 32 illustrates to maintain the front view of cutting open as the part of the disk grinder of the control of dust adapter of another modification embodiment.

Figure 33 is the bottom view of Figure 32;

Figure 34 is the amplification view that the skirt shape member shown in figure 33 and the part of the keeper that is connected with skirt shape member are shown;

Figure 35 illustrates the bottom view that maintains as the disk grinder of the control of dust adapter of another improvement embodiment;

Figure 36 is the cutaway view that illustrates as the part of the skirt shape member of another improvement embodiment; And

Figure 37 illustrates the bottom view that maintains as the disk grinder of the control of dust adapter of another improvement embodiment.

The specific embodiment

Electric tool shown in the accompanying drawing is of portable form, promptly handheld disk grinder 10.Disk grinder 10 is used for for example concrete material, stone material material or other material to be ground being carried out attrition process, and disk grinder 10 is also referred to as " disc sanding machine ".In each figure, identical reference symbol is represented identical member.

As illustrated in fig. 1 and 2, disk grinder 10 comprises: cylindrical motor shell 11a and the gearbox 11b that is connected to its end portion, motor 12 is contained in motor casing 11a with as power supply, and is as shown in Figure 2.Motor 12 is connected to the commercial power (not shown) via the power line of drawing from the rearward end of motor casing 11a 13, and motor 12 is driven by the power that commercial power provides.Bevel gear 15 is connected on the turning cylinder 14 of motor 12, bevel gear 16 and bevel gear 15 engagements.Bevel gear 16 is connected to turning cylinder 14 and meets at right angles in the main body rotating shaft 17 that is provided with.By this way, the torque of motor 12 is transferred to main body rotating shaft 17 via bevel gear 15 and 16, and moving central shaft is rotated so that the main body rotating shaft rotates.Through the supporting member 18 supportive body rotating shaft rotationally 17 that is connected to gearbox 11b.Cylindrical member 19 through being fixed to gearbox 11b is connected to supporting member 18 on the gearbox 11b.Cylindrical member 19 is provided with main body rotating shaft 17 coaxially, and cylindrical member 19 radially is arranged on the outside of main body rotating shaft 17.

In disk grinder 10, power tool body 10a comprises: motor casing 11a, gearbox 11b and embedding motor casing 11a and the inner above-mentioned member of gearbox 11b.Control of dust adapter 20 is removably disposed on this power tool body 10a.When control of dust adapter 20 remained on the power tool body 10a, the type of disk grinder 10 was dust collection type as shown in Figure 2.On the other hand, when control of dust adapter 20 was opened with power tool body 10a with as the emery wheel that is connected to the end-of-arm tooling of main body rotating shaft 17 in 23 minutes, become simple type disk grinder 10 shown in Figure 3.Shown in Fig. 2 and 3, male thread portion 21 is arranged on the end portion of main body rotating shaft 17.Big radial flange part 22 is compared with male thread portion 21, be arranged on more the position near the bottom part of main body rotating shaft 17, and flange section 22 strikings is to supporting member 18.

As shown in Figure 3, when disk grinder 10 is simple type, be directly connected to the male thread portion 21 of the terminal part office that is positioned at main body rotating shaft 17 as the cup-shaped emery wheel 23 of end-of-arm tooling.Emery wheel 23 comprises the base portion 24 of cup-shaped, outer periphery partly the front surface of a plurality of ciamond grinders 25 through be fixed to base portion 24 such as bonding mode.Lining 26 is connected to the radial center part of base portion 24.As shown in Figure 2, lining 26 comprises: be inserted into base portion 24 through hole 24a cylindrical part 26a and be arranged on the annular endplate part 26b of the end of cylindrical part 26a, and vibration-proof rubber sheet 27 is clipped between header portion 26b and the base portion 24.

Emery wheel 23 is connected to main body rotating shaft 17 through lock nut 28, and lock nut 28 is as the clamp structure of screw thread couple to the male thread portion 21 of main body rotating shaft 17.Screw thread couple is arranged on the lock nut 28 to the female thread portion 28a of male thread portion 21.When emery wheel 23 is connected to 17 last times of main body rotating shaft, cylindrical part 26a is inserted in the male thread portion 21, so that the header portion 26b striking of lining 26 is to flange section 22.Then, male thread portion 21 is inserted among the through hole 24a with cylindrical part 26a, and to form following state: base portion 24 contacts with header portion 26b via vibration-proof rubber sheet 27, and lock nut 28 to be connected to male thread portion 21 fastening and fixing to be used for.In order in fastening lock nut 28, not rotate main body rotating shaft 17, locking press button 29 is arranged on the gearbox 11b.

Can reciprocating lock pin (not shown) on the direction parallel with main body rotating shaft 17, be arranged on the locking press button 29.In Fig. 3, through locking press button 29 being pressed into by the position shown in the double dot dash line 29a, lock pin is meshed with the recess (not shown) that in bevel gear 16, forms, so that fixing bevel gear 16, thereby limits the rotation of main body rotating shaft 17.By this way, through twist-lock nut 28 in the state that rotates in restriction main body rotating shaft 17, lock nut 28 easily screw thread couple to male thread portion 21.In addition,, lock main body rotating shaft 17, therefore limited rotation through pressure-locking button 29 when unclamping lock nut 28 when making it to open in 21 minutes with male thread portion.

As shown in Figure 2, control of dust adapter 20 comprises: the control of dust fan 31 that is driven by motor 12 rotation with emery wheel 23 and be used for holding therein control of dust fan 31 and hide the dust collection cover 32 at the radially outer of emery wheel 23.Control of dust fan 31 comprises: integrated disc portions 31a and be arranged on a plurality of blade-section 31b of the front surface side of integrated disc portions 31a, so fan main body is formed by integrated disc portions 31a and a plurality of blade-section 31b.Control of dust fan 31 and emery wheel 23 rotate around the rotary middle spindle of main body rotating shaft 17.

Dust collection cover 32 comprises: end wall portion 33, cylindrical peripheral wall part 34 and via the relative spaced walls 35 of the outer periphery part of control of dust fan 31 and end wall portion 33.End wall portion 33 and peripheral wall portion 34 are through fastened to each other being in the same place of fixed part (not shown) such as screw thread.Inwardly radially outstanding annular space wall 35 integrally is provided with peripheral wall portion 34, and suction inlet 35a is formed in the spaced walls 35.In the front surface side of peripheral wall portion 34, cylindrical tool lid 36 integrally is provided with peripheral wall portion 34.The internal diameter of tool cap 36 is greater than the external diameter of emery wheel 23, to hide the radially outer of emery wheel 23.

In the radial center part of end wall portion 33, the cylindrical retaining part 33a of the cylindrical member 19 that is mounted to power tool body 10a is set.Dust collection cover 32 removably remains on the cylindrical member 19 at retaining part 33a place.When retaining part 33a was installed to cylindrical member 19 peripheral, dust collection cover 32 was fixed on the cylindrical member 19 with tool cap 36.Fan container cavity 37 is formed between end wall portion 33 and the spaced walls 35, so that control of dust fan 31 embeds the inside of fan container cavity 37.When control of dust fan 31 rotated, air flow into the fan container cavity 37 from the outside via suction inlet 35a.The volute flow path 38 that between the periphery of peripheral wall portion 34 and control of dust fan 31, forms, having in a circumferential direction downstream, side becomes big sectional area gradually.As shown in Figure 1, discharge line 39 is located on the dust collection cover 32, to be communicated with the downstream part of volute flow path 38.

All process through each that combines the first shell halfbody 32a and the second shell halfbody 32b to dispose dust collection cover 32, the first shell halfbody 32a and the second shell halfbody 32b by resin material such as nylon.In the first shell halfbody 32a, a part of end wall portion 33 is interosculated with peripheral wall portion 34 and a part of discharge line 39.In the second shell halfbody 32b, the remainder of the remainder of peripheral wall portion 34, discharge line 39, spaced walls 35 and tool cap 36 are interosculated.

As shown in Figure 1, flexible pipe 39a is connected on the discharge line 39, and discharge line 39 is connected on the dust bag (not shown) through flexible pipe 39a.Therefore, through the rotation of control of dust fan 31, the dust that in polishing is handled, is produced by emery wheel 23 is inhaled in the fan container cavity 37 of dust collection cover 32 inside, through flexible pipe 39a dust is directed in the dust bag then.By this way, the dust that in polishing is handled, produces is removed by dust bag, and can not be dispersed in disk grinder 10 around.

In the inside of tool cap 36, the skirt shape member 40 that is used as containment member movably is arranged on the axis direction of main body rotating shaft 17.Skirt shape member 40 is connected on the annular keeper 41; A plurality of compression helical springs 42 as spring member remain between keeper 41 and the spaced walls 35; Therefore from the projected direction of the end surface of tool cap 36, spring force is applied on the skirt shape member 40 through compression helical spring 42.When through emery wheel 23 polishing concrete etc. surperficial, hide the radially outer of emery wheels 23 as the skirt shape member 40 of containment member, therefore can stop dust to be blown to the outside fully.

Removably be connected to the hub sections 31c of control of dust fan 31 as the extension rotating shaft part 51 of threaded shank portion.The bottom part 52 that extends rotating shaft part 51 is inserted among the connecting hole 31d that in the hub sections 31c of control of dust fan 31, forms.Two planes form 180 ° the phase place of squinting mutually in a circumferential direction on the interior periphery surface of connecting hole 31d.On the other hand; As shown in Figure 8; Two planes 53 form corresponding to the cross sectional shape of connecting hole 31d on the outer peripheral surfaces of the bottom part 52 that extends rotating shaft part 51 and 180 ° the phase place of squinting mutually in a circumferential direction, have formed across flats (width-across-flat) structure of bottom part 52 like this.Shown in Fig. 2 and 7B,, be formed in the bottom part 52 as the female thread portion 54 of screw thread couple to the screwed hole of the male thread portion 21 of main body rotating shaft 17.Through plane 53 and connecting hole 31d, extend rotating shaft part 51 and locate in a circumferential direction with control of dust fan 31, in addition, dispose them on direction of principal axis so that be movably.By this way; When control of dust adapter 20 is connected to disk grinder 10; Only the position of the connecting hole 31d through making the position of extending rotating shaft part 51 and control of dust fan 31 matches each other and inserts them; And the location on the realization circumferencial direction, so the driving force of disk grinder 10 can be transferred on the control of dust fan.

Screw thread couple is formed on the end portion of extending rotating shaft part 51 to the male thread portion 55 of the female thread portion 28a of lock nut 28.The male thread portion 21 of main body rotating shaft 17 has mutually the same external diameter and pitch with the male thread portion 55 that extends rotating shaft part 51; Therefore as shown in Figure 3; Emery wheel 23 can be connected on the male thread portion 21 of main body rotating shaft 17; In addition, as shown in Figure 2, emery wheel 23 can be connected on the male thread portion 55 that extends rotating shaft part 51.Through the lock nut 28 fastening emery wheels 23 of screw thread couple to male thread portion 21 and 55.As shown in Figure 2, when emery wheel 23 via extending rotating shaft part 51 when being connected to main body rotating shaft 17, and in addition when control of dust adapter 20 is connected on the power tool body 10a, the type of disk grinder 10 is dust collection type.On the other hand, as shown in Figure 3, when emery wheel 23 is connected to 17 last times of main body rotating shaft, the type of disk grinder 10 is simple types.

In the male thread portion 21 and 55 each all is right-handed thread, and has the identical hand of spiral each other.Therefore, when that kind as shown in Figure 3 is connected to 17 last times of main body rotating shaft with emery wheel 23, lock nut 28 screw thread couple are to male thread portion 21.At this moment, operational lock button 29 makes and to observe from the front surface side of lock nut 28, just from Fig. 3 below observation, in the state that the lock nut that turns right 28 is rotated to restriction main body rotating shaft 17.

Be connected in the main body rotating shaft 17 in order to extend rotating shaft part 51, operational lock button 29 arrives main body rotating shaft 17 so that extension rotating shaft part 51 turns right similarly with screw thread couple, becomes the state that restriction main body rotating shaft 17 is rotated.In addition, for emery wheel 23 is connected in the main body rotating shaft 17, the hub sections of emery wheel 23 is installed on the end portion of extending rotating shaft part 51, so that lock nut 28 screw thread couple are to male thread portion 55.And this moment, form the state that restriction main body rotating shaft 17 is rotated through locking press button 29, and lock nut 28 turns right.By this way, when control of dust fan 31 is coupled to main body rotating shaft 17 via extension rotating shaft part 51, and in addition, when dust collection cover 32 remained on the power tool body 10a, the type of disk grinder 10 was dust collection type.Because emery wheel 23 is connected to main body rotating shaft 17 via extending rotating shaft part 51, can be sure about completely so on axis direction, connect the length of required threaded portion, and can connects exactly.Further,, also screw thread couple can be carried out fully, therefore when realizing connecting accurately, the air capacity that is used for control of dust can be increased even the blade-section 31b of control of dust fan 31 is very thick.

When emery wheel 23 was opened with the disk grinder that maintains control of dust adapter 20 in 10 minutes, unclamping twist-lock nut 28 on the direction.At this moment, in some cases, can unclamp the screw thread couple of female thread portion 54 with the male thread portion 21 of main body rotating shaft 17 of extension rotating shaft part 51, but not unclamp lock nut 28.In addition; Because when the staff pressure-locks button 29 with a hand; It is with another hand twist-lock nut 28; This operation is very difficult, because compare with the position under the situation that lock nut 28 was opened from the male thread portion of main body rotating shaft 17 in 21 minutes, the position of locking press button 29 and lock nut 28 is far apart each other.

Therefore, in the end portion of extending rotating shaft part 51, form the limit rotation part at the recess 56 of the end surface opening that extends rotating shaft part 51.Shown in Fig. 8 B, recess 56 forms hexagonal hole, and outer peripheral surfaces is that hexagonal connection/separately the hexagonal therewith hole of anchor clamps 57 is meshed.Fig. 4 shows connection/separately anchor clamps 57 and the state that is meshed as limit rotation recess 56 partly.A plurality of recesses 58 are formed in lock nut 28 end faces in radial position place mutually the same apart from center of rotation, and connect/separately anchor clamps 59 can be meshed with recess 58, shown in Figure 4 and 5.Connecting/separate in the anchor clamps 59, the protrusion that is meshed with recess 58 59a is being provided.

The anchor clamps 57 of connection as shown in Figure 4/separately and recess 56 engagements and be connected/separate the protrusion 59a of anchor clamps 59 and state that recess 58 meshes in; When as shown in Figure 5 through connect/when separately the rotation of rotating shaft parts 51 is extended in anchor clamps 57 restrictions, through connect/separately anchor clamps 59 with the direction left of unclamping the corresponding Fig. 5 of direction on twist-lock nut 28.By this way, lock nut 28 can easily be opened from the male thread portion that extends rotating shaft part 51 in 55 minutes, did not rotate with respect to main body rotating shaft 17 and extended rotating shaft part 51.At this moment, because can be through in Fig. 5, unclamping lock nut 28 with respect to extending rotating shaft part 51 lock nut 28 that turns left, so connecting/when separately anchor clamps 59 are fixed, connecting/separately anchor clamps 57 can be turned right, and perhaps the two can be rotated simultaneously.

Fig. 6 shows emery wheel 23 and extends the rotating shaft part and opened and extended the disk grinder 10 in the state that rotating shaft part 51 and main body rotating shaft opened in 17 minutes in 51 minutes.When extending rotating shaft part 51 in the state that the rotating shaft part opened in 51 minutes when opening in 17 minutes with extending with the main body rotating shaft at emery wheel 23, press locking press button 29, so that the rotation of restriction main body rotating shaft 17, and the extension rotating shaft part 51 that turns left.At this moment, can through connect/separately anchor clamps 57 operates extension rotating shaft part 51 with turning left, extension rotating shaft part 51 perhaps can turn left when the staff maintains the hub sections 31c of control of dust fan 31 with hand.When extending rotating shaft part 51 screw thread couple to 17 last times of main body rotating shaft; Can through connect/separately anchor clamps 57 operates extension rotating shaft part 51 with turning right, extension rotating shaft part 51 perhaps can turn right when the staff maintains the hub sections 31c of control of dust fan 31 with hand.

Each width of cloth figure among Fig. 9 A-13B shows the modification embodiment that extends rotating shaft part 51.In the end portion of the extension rotating shaft part 51 shown in Fig. 9 A and the 9B, the yi word pattern Baltimore groove promptly at the minus sign groove 56a that extends in the radial direction, is set to the limit rotation part.In the end portion of the extension rotating shaft part 51 shown in Figure 10 A and the 10B, cross Baltimore groove, promptly plus sige groove 56b is set to the limit rotation part.Therefore, for lock nut 28 is connected to shown in Fig. 9 A and 9B extension rotating shaft part 51 or for lock nut 28 was opened from extending the rotating shaft part in 51 minutes, with the member of minus sign groove 56a engagement with connecting/separate anchor clamps.For lock nut 28 is connected to shown in Figure 10 A and 10B extension rotating shaft part 51 or for lock nut 28 was opened from extending the rotating shaft part in 51 minutes, with the member of plus sige groove 56b engagement with connecting/separate anchor clamps.

In extension rotating shaft part 51 end portion shown in Figure 11 A and the 11B, hexagon protuberance 56c is set to the limit rotation part, and it is given prominence to from the end surface of extending rotating shaft part 51.In extension rotating shaft part 51 end portion shown in Figure 12 A and the 12B, square protuberance 56d is set to the limit rotation part, and it is given prominence to from the end surface of extending rotating shaft part 51.End portion in the extension rotating shaft part 51 shown in Figure 13 A and the 13B; Protuberance 56e is set it is given prominence to from the end portion of extending rotating shaft part 51, in the radial direction through hole 56f is not put in protuberance 56e with respect to the rotary middle spindle that extends rotating shaft part 51 as the limit rotation part.Therefore, in order lock nut 28 to be connected to the extension rotating shaft part 51 shown in Figure 11 A and 11B or for lock nut 28 was opened from extending the rotating shaft part in 51 minutes, usefulness such as spanner connect/separate anchor clamps.In order lock nut 28 to be connected to the extension rotating shaft part 51 shown in Figure 13 A and 13B or for lock nut 28 was opened from extending the rotating shaft part in 51 minutes, the bar member that passes through hole 56f is with connecting/separate anchor clamps.

By this way; When limit rotation partly is used to limit the rotation of extending rotating shaft part 51; As long as connect/separately anchor clamps can with extend rotating shaft part 51 and be meshed, just can adopt Any shape, for example recess, protuberance and through in protuberance, forming the shape that through hole obtains.In addition, the shape of lock nut 28 is not limited to the shape that obtains through a plurality of recesses 58 of formation on its end face, and can use the lock nut 28 with square or hexagonal outer peripheral surfaces.

Figure 14 is the cutaway view that the modification embodiment of disk grinder is shown, and Figure 15 is illustrated in the cutaway view that control of dust adapter 20 and control of dust fan 31 and power tool body 10a shown in figure 14 divide the disk grinder under the state of opening.

Shown in figure 14, in the periphery of keeper 41, a plurality of engage stops 41a are provided at predetermined intervals in a circumferential direction.In the inside of tool cap 36, a plurality of engaging groove 36a that are meshed with engage stops 41a are set.Through contacting of engage stops 41a and retainer 36b, the outstanding motion of the skirt shape member 40 of restricted passage compression helical spring 42 extruding.Same in keeper shown in Figure 2 41, form the engage stops that is meshed with the engaging groove that in tool cap 36, forms.

Threaded shank portion 51a is fixed on the hub sections 31c of control of dust fan 31.Shown in figure 14, in threaded shank portion 51a, be formed with the female thread portion 54 of screw thread couple to the male thread portion 21 of main body rotating shaft 17.In threaded shank portion 51a, be formed with outstanding male thread portion 55 from hub sections 31c.Therefore; When above-mentioned extension rotating shaft part 51 by forming with control of dust fan 31 different members so that extend rotating shaft part 51 can separate with control of dust fan 31 time, have with the threaded shank portion 51a of the corresponding structure of structure of extending rotating shaft part 51 and be fixed on the control of dust fan 31 shown in Figure 14 and 15.The rotating shaft part is extended in threaded shank portion 51a configuration.

By this way; The type of disk grinder 10 shown in Figure 14 is dust collection type; Shown in figure 14; Be connected to through the control of dust fan 31 that will combine on the male thread portion 21 of main body rotating shaft 17, then emery wheel 23 be connected on the male thread portion 55 of threaded shank portion 51a, thereby lock nut 28 is fastened on the male thread portion 55 with threaded shank portion 51a.On the other hand, control of dust fan 31 is not connected in the main body rotating shaft 17, but emery wheel 23 is directly connected on the male thread portion 21, the type of the disk grinder 10 that obtains thus is simple types, and is as shown in Figure 3.

Threaded shank portion 51a as extending rotating shaft shown in Figure 14 is fixed to control of dust fan 31, and therefore when control of dust fan 31 and main body rotating shaft were opened in 17 minutes, threaded shank portion 51a and main body rotating shaft were opened in 17 minutes, and be shown in figure 15.

Threaded shank portion 51a shown in Figure 14 is processed by metal material, and control of dust fan 31 is processed by resin material.When through the molded control of dust of mould fan 31, threaded shank portion 51a is set at mould inside, and threaded shank portion 51a is molded with control of dust fan 31.But, by light metal material or integrally molded threaded shank portion 51a of resin material and control of dust fan 31, obtain to have the integrally-built control of dust fan 31 that comprises threaded shank portion 51a through mould.

At the end of threaded shank portion 51a, form as the limit rotation part and be connected/separate the recess 56 that anchor clamps 57 are meshed.As the limit rotation part, as long as connect/separately anchor clamps 57 can with its engagement, shown in Fig. 9 A-13B, just can use Any shape, for example recess, protuberance and the shape that obtains through formation through hole in protuberance.

Figure 16 is the cutaway view that the modification embodiment of control of dust adapter is shown, and Figure 17 is the bottom view that the disk grinder that maintains control of dust adapter shown in Figure 16 is shown, and Figure 18 is the stereogram of disk grinder.Figure 17 and 18 is illustrated in emery wheel 23 and the control of dust adapter 20 that extends under the state that the rotating shaft part opened in 51 minutes.Figure 16 illustrates the state that is connected to control of dust fan 31 as the extension rotating shaft part 51 of threaded shank portion.

Shown in figure 16, between keeper 41 and spaced walls 35, keep in a circumferential direction with equidistance, so that from the projected direction of the end surface of tool cap 36, spring force is being applied to skirt shape member 40 as a plurality of leaf springs 43 of spring member.An end of each leaf spring 43 is fixed on the spaced walls 35, and its other end is against keeper 41.Extend from an end to another end on the interior periphery surface of each leaf spring 43 dust collection cover 32 in the rotation direction upper edge of emery wheel 23, and tilt to the front portion of dust collection cover 32.At control of dust adapter 20 shown in Figure 16, be provided with 5 leaf springs 43.

In keeper 41,12 guide members of giving prominence to its inner radial from its interior periphery surface 44 integrally are arranged to the rib shape.The length of the protuberance of each guide member 44 on radially inner direction is shorter than the length of the protuberance of each leaf spring 43 on radially inner direction.Shown in figure 17; Each guide member 44 extends along the interior periphery surface of keeper 41 in a circumferential direction; And along tilting by rotation direction from the control of dust fan 31 shown in the open side of dust collection cover 32 arrow on the near direction of spaced walls 35 side joints; That is to say that each guide member 44 tilts and makes that each guide member 44 is approaching to suction inlet 35a.It is inequality that each guide member 44 passes through to the height of the protuberance of inner radial from the interior periphery surface of keeper 41.In addition, 12 all guide members 44 are of similar shape, they with the equidistance setting in a circumferential direction, adjacent guide member 44 is arranged to squint each other in a circumferential direction so that observe from the direction of principal axis of main body rotating shaft 17, they can not overlap each other.By this way; Can be through using the separated a pair of mould that is used for injection molding on axis direction; Molded, unitary is provided with the keeper 41 of guide member 44 at an easy rate; Therefore, need not have the mould of labyrinth, can reduce the manufacturing cost of the dust collection cover 32 that comprises this keeper 41 like this.

Figure 19 is the cutaway view that each leaf spring 43 and guide member 44 angle of inclination along the circumferential direction are shown.Shown in figure 19, the inclination angle " B " of the inclination angle " A " of leaf spring 43 greater than guide member 44 is set.Even when leaf spring 43 strains, keeper 41 moves to stroke edge (stroke edge) to spaced walls 35, and the inclination angle A that leaf spring 43 is set is not less than the inclination angle B of each guide member 44.

Shown in Figure 17 and 18, reticular component 61 is arranged on the front surface of spaced walls 35, as protector.Reticular component 61 comprises: diameter is less than annular section 62 and a plurality of flank 63 of the internal diameter of suction inlet 35a, and when bending on the rotation direction of control of dust fan 31, a plurality of flanks 63 extend to annular section 62 from the outer periphery part of spaced walls 35.Integrally form each flank 63 with arc with annular section 62, the inner radial of each flank 63 partly is projected into the front portion of suction inlet 35a.In spaced walls 35, the quantity 12 of flank 63 is less than the blade quantity 15 of control of dust fan 31, i.e. the quantity of blade- section 31b, and 12 flanks 63 are arranged on the circumferencial direction of dust collection cover 32 with equidistance.The front surface of reticular component 61 is outstanding forward, surpasses the front surface of spaced walls 35.

By this way, because reticular component 61 comprises annular section 62 and a plurality of flanks 63, and a plurality of flank 63 is outstanding to inner radial from the front surface frame part of spaced walls 35, so reticular component 61 has the adjustment function of guiding dust stream.Through integrally forming reticular component 61, can have the dust collection cover 32 of adjustment function with the low cost manufacturing with dust collection cover 32.Because through annular section 62 that a plurality of flanks 63 are together coupled to each other in the end portion of interior periphery side, the intensity of reticular component 61 increased, thereby can improve the durability and the operating reliability of dust collection cover 32.

Reticular component 61 is overlapped with the outer periphery of suction inlet 35a.Therefore, even suck relatively large exotic to suction inlet 35a, for example when milled processed through grinding the broken concrete that parts to be ground produce, also can catch this exotic through reticular component 61.By this way, stop exotic from the entering of suction inlet 35a to control of dust fan 31.

When the radially outer part of each flank 63 has rectangular cross sectional shape with respect to spaced walls 35; The part of each flank 63 has the arch section 63a shown in figure 20 in the corner of the relative end of itself and control of dust fan 31 with respect to the cross sectional shape of suction inlet 35a, and the turning is positioned at the rear side of the rotation direction of control of dust fan 31.Therefore, successfully be directed on the control of dust fan 31, so that flow to axis direction with respect to control of dust fan 31 through the arch section 63a of each flank 63 from the eddy current of emery wheel 23 effluents to control of dust fan 31.By this way, through this control of dust fan 31, improved suction efficiency.Arrow among Figure 20 " C " expression sucks flowing of air.

When dust collection cover 32 remains on 10 last times of disk grinder, whole emery wheel 23 is all hidden by dust collection cover 32, and in addition, the back surface of the emery wheel 23 relative with the abradant surface of emery wheel 23 is spaced apart wall 35 and hides with reticular component 61.When remaining under the state on the disk grinder 10 starting motor 12 at dust collection cover 32, control of dust fan 31 rotates with emery wheel 23, so as at suction inlet 35a place the generation inhalation power.When emery wheel 23 be pressed onto to be ground such as the material of concrete or ceramic tile on when carrying out milled processed, radially spread to the outside such as the dust of abrasive flour from the outer periphery part of emery wheel 23.The dust that scatters stopped by skirt shape member 40, in order to avoid to external leakage, and the dust that scatters in the trapped inside of tool cap 36.To be drawn into the fan container cavity 37 from suction inlet 35a at the dust of tool cap 36 trapped inside inhalation power,, discharge from discharge line 39 through volute flow path 38 through control of dust fan 31.In the dust bag (not shown) at the place, end that is arranged at discharge line 39, collect the dust of discharging.

Grind the dust that produces through emery wheel 23, scatter to its tangential direction,, in the middle of the outer periphery part and keeper 41 through emery wheel 23, and be attracted to suction inlet 35a when carrying out vortex in tool cap 36 inside from the outer periphery part of emery wheel 23.At this moment, the interior periphery surface at keeper 41 is provided with guide member 44 to stretch along the dust curtain coating and to tilt with respect to circumferencial direction.Therefore, dust flows along these guide members 44, through guide member 44 guiding dusts, with when the rotation of emery wheel 23 on equidirectional, makes dust on axis direction, flow to suction inlet 35a.That is, dust is in the internal helicoid flows of tool cap 36.

Through the outer periphery part and the keeper 41 middle dust streams afterwards of emery wheel 23, through the centre of leaf spring 43.Because these leaf springs 43 also are set to stretch and tilt with respect to circumferencial direction along the dust curtain coating; So dust flows along leaf spring 43; Therefore through leaf spring 43 guiding dusts,, make dust on axis direction, flow to suction inlet 35a with when enhancing during to the eddy current of the rotation direction of control of dust fan 31.Even the roughness according to material 50 to be ground vertically moves skirt shape member 40, the eddy current of dust can not weaken because of the guiding of leaf spring 43 yet, because the inclination angle A of each leaf spring 43 is not less than the inclination angle B of each guide member 44.

Then, the dust eddy current that is strengthened by guide member 44 and leaf spring 43 flows along flank 63, and is directed into suction inlet 35a.These flanks 63 extend along the rotation direction of control of dust fan 31, the axle center curvature of this export-oriented control of dust fan 31, and therefore when further strengthening eddy current through flank 63, dust stream is directed the center to control of dust fan 31.Further, the dust stream that flows into volute flow path 38 from suction inlet 35a is coupled to 62 guiding of annular section of the end of flank 63, and points to the axis direction (inflow direction) of control of dust fan 31.Because each guide member 44, leaf spring 43 and flank 63 are all by the equidistance setting in a circumferential direction, so when keeping flowing basically uniformly with respect to circumferencial direction, dust flows into volute flow path 38 from suction inlet 35a.

Along with centre through each blade-section 31b; Dust is discharged by outward radial ground through the revolving force of control of dust fan 31, through volute flow path 38 after suction inlet 35a flows into volute flow path 38; Discharge from discharge line 39, and be collected into (not shown) in the dust bag.By this way; Inside at dust collection cover 32; When with the equidirectional of the direction of rotation of control of dust fan 31 on; Through being arranged on the rotation of guide member 44, leaf spring 43 and flank 63 on the keeper 41, the dust stream of discharging from emery wheel 23 flows into the volute flow path 38, therefore can improve the dust catching efficiency of control of dust fan 31.Therefore, do not need to make on a large scale the dust catching efficiency that control of dust fan 31 just can improve control of dust fan 31, and can further collect the dust of discharging effectively from emery wheel 23.

Because the quantity of flank 63 is different with the quantity of the blade-section 31b of control of dust fan 31; So for each blade-section 31b, each phase place of the pressure oscillation that between each blade-section 31b of control of dust fan 31 and each flank 63, produces all with another skew.By this way, the noise sympathetic response that produces owing to pressure oscillation is prevented from, so the noise of this dust collection cover 32 can be lowered.

The reticular component 61 that comprises flank 63 and annular section 62 is provided to the suction inlet 35a of dust collection cover 32; Therefore; Even polishedly in milled processed get into the inside of dust collection cover 32 because of carelessness, also can catch exotic through reticular component 61 such as the big exotic of concrete block.By this way, can stop exotic to enter into volute flow path 38 from suction inlet 35a.Therefore, prevent therefore can improve the operating reliability of this dust collection cover 32 owing to during milled processed, hinder the rotation of control of dust fan 31 or destroy control of dust fan 31 through the exotic that grinds material to be ground 50 generations.

Figure 21 shows the modification embodiment of the reticular component 61 that is set on the dust collection cover 32.Reticular component 61 comprises: outer ring portion 62a; And diameter is less than the annular inner portion 62b of the diameter of outer ring portion 62a.The diameter of annular inner portion 62a is less than the diameter of annular section shown in Figure 17 62.Intersection band-like portions 64 with trellis pattern are arranged between two annular section 62a and the 62b.A plurality of flanks 63 are set to outer ring portion 62a, and are similar with the mode that is set to rib shown in Figure 17.Be set on the reticular component 61 through intersection band-like portions 64, can improve the intensity of reticular component 61 the trellis pattern.

Figure 22 shows the another modification embodiment of the reticular component 61 that is set on the dust collection cover 32.Reticular component 61 has ring protection plate 66, in ring protection plate 66, is formed equidistantly 12 manholes 65.With be set to the similar mode of flank shown in Figure 17, flank 63 is set on the baffle 66.Through forming the reticular component 61 that uses this baffle 66, reticular component 61 can be set to have simple and firm structure.Reticular component 61 shown in Figure 21 and 22 can be processed by resin material; So that integrally form with the shell halfbody 32b of dust collection cover 32; Perhaps reticular component 61 can be processed by resin metallic, so that be individually formed to the member different with shell halfbody 32b and be connected on the spaced walls 35.

Figure 23 is the cutaway view that the disk grinder 10 of the modification embodiment that is provided with the control of dust adapter is shown, and Figure 24 is the bottom view of Figure 23.Figure 25 illustrates the side view that is set to the recess on the keeper, and Figure 26 is the stereogram that keeper and connected peripheral part are shown.

In dust collection cover 32, form 4 engaging groove 36a, the engage stops 41a that is meshed with each engaging groove 36a is set on the keeper 41 that is formed from a resin.Shown in figure 25; Engaging groove 36a comprises: the first recess 71a of opening and in a circumferential direction away from the second recess 71b of the first recess 71a at the front end surface place of dust collection cover 32, the first recess 71a and the second recess 71b interconnect through guiding recess 71c.In the second recess 71b, be provided for supporting the retainer surface 71d of engage stops 41a.By this way, opposite to the spring force of compression helical spring 42 in the state that the engage stops 41a and the first recess 71a are meshed keeper 41 is connected on the dust collection cover 32, keeper 41 is pushed or inserts in the dust collection cover 32.And, rotate keeper 41, pass through engage stops 41a near the guiding recess 71c in the state of the guiding surface 71e of guiding recess 71c up to engage stops 41a, arrive the position of the second recess 71b.When the thrust that in this state, discharges keeper 41, engage stops 41a is resisted against on the retainer surface 71d of the second recess 71b.By this way, keeper 41 remains on the dust collection cover 32, therefore stops itself and dust collection cover to be opened in 32 minutes.By this way, through meshing this engage stops 41a with engaging groove 36a, keeper 41 can be accurately and easily is connected on the dust collection cover 32.With respect to the dust collection cover 32 in the state of the engage stops 41a in the second recess 71b that setovers through spring force, keeper 41 can vertically move.

In keeper 41, shown in figure 26, on the one of which end surfaces, form the link slot 41b that maintains skirt shape member 40, shown in figure 27, the protuberance 41c that maintains compression helical spring 42 is set on its other end surface.Skirt shape member 40 forms ring-type, and felt system is adjacent to each other with the two ends of the textile material of band shape.The thickness that skirt shape member 40 is set is greater than link slot 41b41 width, and when skirt shape member 40 pushed among the link slot 41b, skirt shape member 40 was fixed on the keeper 41.The front end surface that is fixed to the skirt shape member 40 of keeper 41 is given prominence to forward, surpasses the front surface of emery wheel 23.

When carrying out milled processed through disk grinder 10; The skirt shape member 40 outstanding front surfaces that surpass emery wheel 23; Therefore; Skirt shape member 40 is pressed onto on the material to be ground 50 through the spring force of compression helical spring 42, stops like this between skirt shape member 40 and material 50 to be ground to form at interval.In this state, on the direction shown in the arrow of Figure 24, drive emery wheel 23 rotationally, so that disk grinder 10 moves along the surface of material 50 to be ground.At this moment; Shown in Figure 28 A and 28B; Even if on the surface of material to be ground 50, there is ledge 50a; Also can avoid in the part of the skirt shape member 40 that contacts with ledge 50a, producing at interval, because except that adjacent part 40a, skirt shape member 40 is formed with continuous shape continuously.By this way, stop dust stream etc. to get in the fan container cavity 37.

Because skirt shape member 40 is pressed among the link slot 41b to remain on the keeper 41, therefore can simplify the work that skirt shape member 40 is connected to keeper 41.Because skirt shape member 40 manufacturing costs of being processed by fabric are lower than the cost of hairbrush etc., so even if replace skirt shape member 40 with new peripheral member frequently, also can avoid the increase of its maintenance cost.Because flow into the fan container cavity 37 from suction inlet 35a by control of dust fan 31 inhaled airs, and be discharged to discharge line 39, so reduced substantially at the pressure of discharge line 39 with fan container cavity 37 connected regions.Skirt shape member 40 remains on the link slot 41b, so that locate the adjacent part at its two ends, to be complementary with the best part of inhalation power, the best part of inhalation power is the zone that discharge line 39 is communicated with fan container cavity 37.If carefully do not sew up or adhesion adjacent part 40a, possibly produce small interval in some cases.But, shown in figure 24, through adjacent part 40a being arranged on the best position of inhalation power, can avoid dust etc. to be discharged to the outside from adjacent part 40a.

Because before skirt shape member 40, be connected in the state of keeper 41, keeper 41 remained on the dust collection cover 32, so skirt shape member 40 can easily remain to dust collection cover 32.Because can keep the rigidity of skirt shape member 40, so even if the material to be ground 50 of skirt shape member 40 contact such as concrete surfaces so that it is applied external force, also can accurately keep the annular shape of skirt shape member 40 through keeper 41.Because skirt shape member 40 inserts and is fixed to the link slot 41b of keeper 41, so can easily skirt shape member 40 be connected on the keeper 41.Even if through grinding loss skirt shape member 40, also can be easily it be changed with new skirt shape member 40, therefore can improve the maintainability of disk grinder 10.

Figure 29 A is the bottom view that the skirt shape member 40 of revising embodiment is shown, and Figure 29 B is the cutaway view that obtains along the line 29B-29B among Figure 29 A.

Shown in Figure 29 A and 29B, in keeper 41, the engage stops 72 that is projected among the link slot 41b is provided.When skirt shape member 40 was pressed among the link slot 41b, engage stops 72 was bitten skirt shape member 40, came off from link slot 41b to avoid skirt shape member 40.By this way, skirt shape member 40 can be fixed on the keeper 41 exactly.Can before form the recess that engage stops 72 slips into skirt shape member 40.

Figure 30 A is the bottom view that the skirt shape member 40 of another modification embodiment is shown, and Figure 30 B is the cutaway view that the line 30B-30B along Figure 30 A obtains.

Form the skirt shape member 40 shown in Figure 30 A and the 30B through range upon range of three fabrics.By this way, through range upon range of a plurality of fabrics, can form skirt shape member 40.

Figure 31 is the front view of a part that the skirt shape member 40 of another modification embodiment is shown.In skirt shape member 40, will restrict with two lines 73 is woven into from the outstanding a part of skirt shape member 40 of keeper 41.73 be woven in the skirt shape member 40 through restricting, can the intensity and the flexibility of skirt shape member 40 be adjusted to expected performance.

Figure 32 illustrates the front view that the part of the disk grinder of the control of dust adapter that maintains another modification embodiment is cut open.Figure 33 is the bottom view of Figure 32, and Figure 34 is the amplification view of a part that the keeper of skirt shape member shown in Figure 33 and joint skirt shape member is shown.

Though above-mentioned skirt shape member 40 is formed by webbing, shown in figure 33, this skirt shape member 40 also can be formed by a plurality of fabric flat members 74.In keeper 41, can form a plurality of link slot 41b that are connected with each flat member 74.The length of flat member 74 is the length of link slot 41b no better than, and flat member 74 forms strip, so that its thickness is greater than the width of link slot 41b.Shown in figure 34, flat member 74 remains on the link slot 41b, so that the part of its side on width is outstanding from the front surface of keeper 41.

Each flat member 74 tilts with respect to the tangential direction of the radius of control of dust fan 31, and trip part from it part downstream radially is internally in the downstream part on the direction of rotation of control of dust fan 31.In the downstream part of flat member 74, form the tapering part 74a that its end portion comes to a point, the bottom part of tapering part 74a and another flat member 74 is overlapping, between them, to sandwich at interval.By this way, between two flat members 74 lap adjacent one another are, form at interval, in skirt shape member 40, form a plurality of transmission flow paths 75, shown in the arrow among Figure 33, through each at interval air through a plurality of transmission flow paths 75.

In a plurality of transmission flow paths 75 each all is tilted, so that be comprised in the eddy current that the rotation through control of dust fan 31 produces by emery wheel 23, so air is involved in from the outside and flows into the skirt shape member 40.By this way, a large amount of air are directed in the fan container cavity 37.Because each flat member 74 and another flat member 74 overlaids are to sandwich at interval between they of their places, two ends in a longitudinal direction, so stop the dust that scatters through emery wheel 23 outward radials from skirt shape member 40, to come out.According to the nonferromagnetic substance of emery wheel 23 and the intake performance of control of dust fan 31, each each inclination angle of length and flow path area of section and a plurality of transmission flow paths 75 of a plurality of transmission flow paths 75 is set.

Figure 35 is the bottom view that the disk grinder 10 that is provided with the skirt shape member 40 that improves embodiment is shown.This skirt shape member 40 is formed by a plurality of flat members 74, and the thickness of a plurality of generally flat members 74 is identical at their longitudinal direction.

Figure 36 is the cutaway view that the skirt shape member 40 that improves embodiment is shown, and forms skirt shape member 40 so that range upon range of a plurality of textile material is to be used for each flat member 74.Each flat member 74 can form through laminated fabric material, resin sheet, metallic brush.

Figure 37 is the bottom view that the disk grinder of the control of dust adapter that maintains another improvement embodiment is shown.This skirt shape member 40 is by forming via a plurality of flat members 74 that are connected to link slot 41b at interval continuously, so that between them, sandwich in a circumferential direction at interval.The end face of each flat member 74 of inclination shown in figure 37, and between the end face of flat member 74, form a plurality of transmission flow paths 75 through the interval.But skirt shape member 40 can be formed by webbing, and a plurality of through holes that form a plurality of transmission flow paths can be formed in the skirt shape member 40.In addition; Even if a plurality of transmission flow paths 75 are formed in the skirt shape member 40 with outstanding in the radial direction; Also can flow through a plurality of transmission flow path 75 inner air guides the dust that is scattered by emery wheel 23, therefore stops dust to be discharged to the outside of skirt shape member 40.

Hereinbefore, based on embodiment the invention that the inventor did has been described particularly.But the present invention is not limited to above-mentioned embodiment, can make various modifications and variation within the scope of the invention.For example, the disk grinder 10 that illustrates is to use the electric power tool of motor as drive source, i.e. electric tool.But the present invention can also be used to use the electric tool type of air operated machine as drive source.The disk grinder 10 that illustrates is used for attrition process is carried out on the surface of material to be ground, so that can handle the surface of material to be ground through attrition process roughly.On the other hand, processing at last is called " polishing ", and the electric tool that carries out polishing is called " disc sanding machine " or " polishing machine ".Electric tool of the present invention also can be used for implementing the device of polishing.

Claims (20)

1. a control of dust adapter is connected to power tool body, and collects the dust that when the end-of-arm tooling that drives rotationally through the main body rotating shaft by said power tool body is processed material to be ground, produces, and it is characterized in that:

Said control of dust adapter comprises:

The control of dust fan is driven by said main body rotating shaft rotationally; With

Dust collection cover remains on the said power tool body holding said control of dust fan therein, and hides the radially outer of said end-of-arm tooling;

Said control of dust fan comprises fan main body and threaded shank portion, and said fan main body has a plurality of blades; Said threaded shank portion is arranged on the radial center part of said fan main body, and in said threaded shank portion, is formed with the female thread portion of screw thread couple to the male thread portion of said main body rotating shaft; And

Screw thread couple is set at the end of said threaded shank portion to the male thread portion on the clamp structure that is used for fixing said end-of-arm tooling.

2. control of dust adapter according to claim 1 is characterized in that:

Said threaded shank portion is provided with and is used to limit the limit rotation part that said control of dust fan rotates on the direction of rotation at said clamp structure during with respect to the said external thread part component of rotation at said clamp structure.

3. control of dust adapter according to claim 2 is characterized in that:

Said limit rotation partly is the recess such as hex hole, and said recess is meshed at the end surface place opening of the said male thread portion of said threaded shank portion and with being connected/separating anchor clamps, and

Said connection/separately anchor clamps are meshed with said recess, rotate on the direction of rotation of said clamp structure to limit said control of dust fan.

4. control of dust adapter according to claim 2 is characterized in that:

Said limit rotation partly is the prodger such as the hexagon prodger, and said prodger is outstanding and be meshed with being connected/separating anchor clamps from the end surface of the said male thread portion of said threaded shank portion, and

Said connection/separately anchor clamps are meshed with said prodger, rotate on the direction of rotation of said clamp structure to limit said control of dust fan.

5. control of dust adapter according to claim 1 is characterized in that:

Said threaded shank portion is fixed to said fan main body.

6. control of dust adapter according to claim 1 is characterized in that:

Said threaded shank portion and said fan main body integrally form.

7. control of dust adapter according to claim 1 is characterized in that:

Said threaded shank portion is to extend the rotating shaft part, and said extension rotating shaft part removably remains to said fan main body and extends said main body rotating shaft.

8. control of dust adapter according to claim 1 is characterized in that:

Avoid exotic to be arranged on the said dust collection cover from the reticular component that said end-of-arm tooling gets into said control of dust fan.

9. control of dust adapter according to claim 8 is characterized in that:

Said reticular component comprises:

Annular section; With

A plurality of flanks, said a plurality of flanks extend from the interior periphery surface curvature of said dust collection cover and to said annular section on the direction of rotation of said control of dust fan, so that combine with said annular section.

10. control of dust adapter according to claim 8 is characterized in that:

Said reticular component comprises:

First annular section;

Second annular section, the diameter of said second annular section is greater than the diameter of said first annular section; And

A plurality of flanks, said a plurality of flanks extend from the interior periphery surface curvature of said dust collection cover and to said second annular section on the direction of rotation of said control of dust fan.

11. control of dust adapter according to claim 8 is characterized in that:

Said reticular component comprises:

The annular slab member is formed with a plurality of through holes on said annular slab member; And

A plurality of flanks, said a plurality of flanks from the interior periphery surface curvature of said dust collection cover, and extend to combine with said annular slab member to said second annular section on the direction of rotation of said control of dust fan.

12. control of dust adapter according to claim 1 is characterized in that:

Said control of dust adapter also comprises:

Annular keeper is arranged on the terminal part office of said dust collection cover, so that be movably on axis direction;

By the skirt shape member that fabric is processed, said skirt shape member remains on the said keeper, and stops the distribution of the dust that when processing material to be ground, produces; And

Spring member, said spring member are arranged between said keeper and the said dust collection cover, and on the direction that said skirt shape member is given prominence to from the front surface of said dust collection cover, apply spring force to said keeper.

13. control of dust adapter according to claim 12 is characterized in that:

Said skirt shape member remains on the said keeper, so that the two ends of ribbon-shaped members are adjacent to each other, and adjacent part is arranged in the zone corresponding with the exhaust outlet of said dust collection cover.

14. control of dust adapter according to claim 13 is characterized in that:

Said skirt shape member forms through range upon range of a plurality of members.

15. control of dust adapter according to claim 12 is characterized in that:

Radially outward outstanding a plurality of engage stops are arranged on the said keeper, and the link slot that is meshed with each engage stops is formed in the said dust collection cover, and each said link slot comprises:

First recess, the opening at the front surface place of said dust collection cover;

Second recess comprises being used to support said engage stops so that in a circumferential direction away from the stop surfaces of said first recess; With

The guiding recess is coupled said first recess and said second recess mutually.

16. control of dust adapter according to claim 12 is characterized in that:

In said skirt shape member, be formed with a plurality of inside and outside transmission flow paths that interconnect that are used to make said skirt shape member.

17. control of dust adapter according to claim 16 is characterized in that:

Each said transmission flow path tilts from the direction that the outside opening of each said transmission flow path partly squints on the direction of rotation of said control of dust fan along the inside opening of each said transmission flow path part.

18. control of dust adapter according to claim 15 is characterized in that:

Said skirt shape member comprises a plurality of flat members that remain on the said keeper; So that radially inwardly locate in its downstream on the direction of rotation of said control of dust fan; The end of each the said flat member on the said circumferencial direction and on said circumferencial direction the end of another flat member of contiguous said end overlapping between them, to sandwich at interval, so that forms the transmission flow path by said interval.

19. an electric tool carries out attrition process through end-of-arm tooling to material to be ground, it is characterized in that:

Said electric tool comprises:

Power tool body is provided with the main body rotating shaft that is used for driving rotationally said end-of-arm tooling;

The control of dust fan is driven by said main body rotating shaft rotationally; And

Dust collection cover remains on the said power tool body holding said control of dust fan, and hides the radially outer of said end-of-arm tooling;

Said control of dust fan comprises fan main body and threaded shank portion; Said fan main body has a plurality of blades; Said threaded shank portion is arranged on the radial center part of said fan main body; In said threaded shank portion, be formed with the female thread portion of screw thread couple, and in said threaded shank portion, be provided with the male thread portion of screw thread couple to the clamp structure that is used for fixing said end-of-arm tooling to the male thread portion of said main body rotating shaft, and

The dust that when processing material to be ground through said end-of-arm tooling, produces is inhaled in the said dust collection cover.

20. electric tool according to claim 19 is characterized in that:

Said threaded shank portion is to extend the rotating shaft part, and said extension rotating shaft part removably remains to said fan main body and extends said main body rotating shaft.

Images