CN205325320U

CN205325320U - Dust cover and power tool

Info

Publication number: CN205325320U
Application number: CN201521098982.9U
Authority: CN
Inventors: 孙井龙; 朱伯元
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2016-06-22
Anticipated expiration: 2025-12-24

Abstract

The utility model relates to a dust cover and power tool, wherein the dust cover includes: the cover body has ji chenkou and supplies the drill bit hole of working head entering, the sealing washer, install in the drill bit hole, the sealing washer can with the working head circumference fixed coordination that stretches into the drill bit hole to a space for $sealing up between working head and the drill bit hole, the holding ring, with the drill bit hole can relatively cooperate with rotating, and with the common axial positioning of the cover body the sealing washer. Power tool includes power tool body and working head and aforesaid dust cover, when above -mentioned dust cover uses with the drill bit cooperation, the working head warp the drill bit hole is stretched into cover internal portion, the working head with sealing washer interference fit, the working head with holding ring clearance fit utilizes the sealing washer can prevent effectively that the dust from overflowing from the drill bit.

Description

Dust cover and power tool

Technical field

This utility model relates to a kind of dust cover and power tool, particularly relates to a kind of electric drill, impacts the dust cover of the hand-held drill gun class power tools such as brill, electric hammer and have the electric drill of this dust cover, impact the hand-held drill gun class power tools such as brill, electric hammer。

Background technology

Drill gun class power tool, such as electric hammer, is primarily used on concrete, floor, brick wall, stone material and holes。Owing to the rotating speed of electric hammer is higher, the dust produced during boring can fly upward everywhere along with drill bit, and both contaminated airs affect again the physical and mental health of operator。For this, occur in that dust cover, but existing dust cover there is also some problems in use。As: drill bit location is not good, scheme is complicated, and dust is easily accessible the chuck place of drill bit, causes complete machine to lose efficacy。

Utility model content

Based on this, it is necessary to provide a kind of dust cover, it is possible to effectively prevent dust from overflowing from drill bit。

A kind of dust cover, including:

Cover body, has dust collecting opening and the drill bit bore entered for work head；

Sealing ring, is installed on described drill bit bore, and described sealing ring can circumferentially fixed with the work stretching into drill bit bore coordinate, and for the space between seal operation head and drill bit bore；

Locating ring, coordinates rotatably with described drill bit bore, and jointly axially positions described sealing ring with described cover body。

Above-mentioned dust cover and drill bit with the use of time, sealing ring coordinates in order to circumferentially fixed with the work stretching into drill bit bore, and for the space between seal operation head and drill bit bore, it is thus possible to effectively prevent dust from overflowing from drill bit。

Wherein in an embodiment, described cover body also includes dust mouth, and described dust mouth is connected to dust guiding tube or removable dust bag。

Wherein in an embodiment, the inner surface that described sealing ring is positioned within cover body is formed with slope。

Wherein in an embodiment, being also equipped with bearing in described drill bit bore, described locating ring is fixed on the inner ring of described bearing。

Wherein in an embodiment, the internal diameter of described locating ring is more than the internal diameter of described sealing ring。

Wherein in an embodiment, described cover body has telescopic elastic part, and described dust collecting opening is located on described elastic part。

Wherein in an embodiment, described cover body includes fixed cover and is connected to the elastic sleeve of fixed cover, and described drill bit bore is positioned on the wall of described fixed cover, and dust collecting opening is the free port of elastic sleeve。

Wherein in an embodiment, the cylindrical of described sealing ring is formed with groove, and described sealing ring is coordinated with the projection on described cover body rotatably by described groove。

A kind of power tool is also proposed, including power tool body and work head and aforesaid dust cover, wherein, described work head stretches into inside described cover body through described drill bit bore, described work head and described sealing ring interference fit, described work head and described locating ring matched in clearance。

Above-mentioned power tool, work head and sealing ring interference fit, form effective sealing, it is prevented that dust is overflowed。

Wherein in an embodiment, the internal diameter of described sealing ring, locating ring internal diameter, and the reference dimension that work head matches with described sealing ring and locating ring partly is 10 millimeters。

Wherein in an embodiment, tightened together by larynx hoop or band between described dust cover with described power tool body。

Accompanying drawing explanation

Fig. 1 is the schematic diagram of this utility model dust cover；

Fig. 2 has the schematic diagram of the power tool of dust cover；

Fig. 3 is the partial enlarged drawing of Fig. 2。

Related elements reference numeral in figure is as follows:

110, dust cover 112, cover body 1123, dust collecting opening

1124, drill bit bore 1125, dust mouth 113, fixed cover

114, elastic sleeve 115, sealing ring 1152, shielding part

116, locating ring 117, bearing 120, power tool body

130, work 132, operation part 134, coupling part

140, fixed structure 150, dust collect plant

Detailed description of the invention

Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail。Elaborate a lot of detail in the following description so that fully understanding this utility model。But this utility model can be implemented being much different from alternate manner described here, and those skilled in the art can do similar improvement when without prejudice to this utility model intension, therefore this utility model is by the restriction of following public specific embodiment。

Below in conjunction with accompanying drawing, the better embodiment of this utility model dust cover and power tool is described。

Refer to Fig. 1, the utility model proposes the dust cover 110 of a kind of power tool。Such as Fig. 2, dust cover 110 may be installed on power tool body 120, and with work 130 with the use of, thus providing a kind of power tool with dirt exclusion capabilities。

Power tool herein, is a kind of drill gun class power tool。For example, it may be electric hammer, electric drill, electric pick etc., it is also possible to it is the multifunctional electric hammer possessing hammer, brill function。Correspondingly, work 130 can be the work head that drill bit, tup or pick etc. can perform the operation such as brill, hammer。

With reference to Fig. 1, dust cover 110 includes cover body 112。Cover body 112 has dust collecting opening 1123, drill bit bore 1124 and dust mouth 1125。Cover body 112 includes fixed cover 113 and is connected to the elastic sleeve 114 of fixed cover 113。Drill bit bore 1124 is positioned on the wall of fixed cover 113, and dust collecting opening 1123 is then the free port of elastic sleeve 114。During use, cover body 112 is fixed on power tool body 120, and work 130 enters in cover body 112 via drill bit bore 1124。Cover body 112 is provided with fixed structure 140, be fixed to on power tool body 120。Fixed structure can be larynx hoop, band etc., with fixed enclosure 112 again after drill bit bore 1124 are inserted in work 130。

When work 130 contact working media, elastic sleeve 114 is compressed and is contacted with working media。When work 130 starts broken working media (such as boring), it is internal that the dust hit down enters cover body 112 through dust collecting opening 1123, under the factor effects such as power tool vibrations, dust deadweight, discharges through dust mouth 1125。

Elastic sleeve 114 can stretch, and is therefore adapted to the job requirements of work 130 different depth。Dust collecting opening 1123 is set to have smooth end face, to contact at elastic sleeve 114, working media process fits tightly the surface in working media always, make dust can only enter cover body 112 through dust collecting opening 1123 internal, avoid dust disorderly to fly everywhere, after being particularly prevented effectively from dust effusion during upward perforating, fall into eyes of user。

Elastic sleeve 114 does the understanding of broad sense herein。Such as, it can be that entirety has elastic bourdon tube。Can also being the rigid element combination that adds elastomeric element, wherein rigid element be in order to contact with working media, rigid element then by elastomeric element realize relative to fixed cover 113 closer or far from motion。

Cover body 112 is transparent cover, in order to do not stop user's sight line, it is simple to work 130 positions when starting operation on working media。

With reference to Fig. 1, in order to avoid dust is run out of from drill bit bore 1124 when using, drill bit bore 1124 is also equipped with sealing ring 115, locating ring 116 and bearing 117。

Sealing ring 115 is installed in rotation in drill bit bore 1124, its in drill bit bore 1124 relatively locating ring 116 and bearing 117 closer to cover body 112 inner space。Sealing ring 115 is positioned jointly by locating ring 116 and bearing 117 in the axial direction。Locating ring 116 is then fixed on the inner ring of bearing 117。Sealing ring 115 has the shielding part 1152 sealing up drill bit bore 1124, it is prevented that dust enters the gap between sealing ring 115 and drill bit bore 1124。Ginseng Fig. 3, the outer ring of sealing ring 115 becomes groove, and aforesaid shielding part 1152 is the upper wall of groove。When sealing ring 115 is assemblied in drill bit bore 1124, groove and the projection on cover body 112 realize male-female engagement, and allow sealing ring 115 to rotate relative to cover body 112。

The internal diameter of sealing ring 115 is more than the internal diameter of locating ring 116, in order to can reach following effect after work 130 is inserted: locating ring 116 and work 130 matched in clearance, work 130 is rotatable relative to locating ring 116；Meanwhile, work 130 and sealing ring 115 interference fit are to form good sealing, and when work 130 rotates, band dynamic seal ring 115 rotates together。

Ginseng Fig. 2 and Fig. 3, for the work 130 of hand-held drill gun class, such as drill bit, generally comprise operation part 132 and coupling part 134, wherein operation part 132 is in order to operation on working media, and coupling part 134 is then in order to be clamped in power tool body 120 to transmit power。Typically, the external diameter of operation part 132 has plurality of specifications as required, and the external diameter of coupling part 134 is generally fixing。

When sealing ring 115, locating ring 116 coordinate with work 130, all coordinate with coupling part 134。In other words, dust cover 110 is to utilize the fixed dimension part in work 130 to realize the sealing to work 130 and location, it is not necessary to consider the dimensional problem of the work 130 of different size, easy to use and good sealing effect。

The basic major diameter of coupling part 134 is generally 10 millimeters, accordingly, the internal diameter of sealing ring 115, locating ring 116 internal diameter be also configured as reference dimension 10 millimeters, but the tolerance of three is different。By forming different tolerance fit, reach coupling part 134 and sealing ring 115 interference fit, and coupling part 134 and locating ring 116 are the purpose of matched in clearance。

Ginseng Fig. 3, after dust cover 110 is fixed on power tool body 120, work 130 is through drill bit bore 1124, and its coupling part 134 and sealing ring 115 interference fit, be matched in clearance with locating ring 116。

When work 130 performs bore operation, work 130 drives dust cover 110 to rotate together, and sealing ring 115 is always maintained at sealing state with work 130, it is prevented that dust is run out of from drill bit bore 1124。When work 130 performs hammering operation, sealing ring 115 is by axial limiting, and work 130 is reciprocating relative to sealing ring 115。Cover body 112 is fixed on power tool body 120, it is to avoid dust cover 110 is followed work 130 and moved together。

Additionally, the inner surface that sealing ring 115 is positioned within cover body 112 is formed with slope。After dust enters cover body 112 inside, the dust on the slope that falls also can be got rid of away due to the rotation of sealing ring 115, it is to avoid dust accumulation is on the inner surface of sealing ring 115。

Further, fixed cover 113 arranges the inwall of drill bit bore 1124 and is also configured to slope。Dust easily slides to dust mouth 1125 after falling。

Locating ring 116 can be directly anchored in drill bit bore 1124。Herein, it is utilize bearing 117 to fasten locating ring 116。Locating ring 116 can be followed the inner ring of bearing 117 and be rotated together, it is thus possible to avoid when work 130 touches locating ring 116 owing to rocking, the phenomenon of dry grinding occurs between 130 and locating ring 116 in work。

Locating ring 116 can also be cancelled, and only arranges bearing 117, makes the inner ring matched in clearance of work 130 and bearing 117。And arrange locating ring 116 and bearing 117 with the use of meaning be in that: the precision of bearing 117 is significantly high, the precision of coupling part 134 is then poor, the cooperation that the two more difficult formation is good, now locating ring 116 is as a transition element, the machining accuracy of coupling part 134 can be well adapted for, being easily achieved, cost is low。

Ginseng Fig. 1 and Fig. 2, the cover body 112 of dust cover 110 is also provided with dust mouth 1125。Dust mouth 1125 is connected to dust collect plant 150。Dust collect plant 150 can be dust guiding tube, or the dust bag for changing。

Dust can be derived by dust guiding tube in time, and user need not quit work repeatedly。Dust bag is when collecting amount of dust and reaching to a certain degree, it is possible to takes off from dust cover 110, then opens dust bag, is derived by dust, it is possible to lengthening working hours, user's long period stops work once。

Ginseng Fig. 1, at sealing ring 115 radially, the center of dust mouth 1125 is relative to the off-centring certain distance of drill bit bore 1124, it is simple to connect dust guiding tube or dust bag。

Further, ginseng Fig. 1 and Fig. 2, the fixed cover 113 of cover body 112 is arranged to include Part I (non-label) and Part II (non-label), the centrage of Part II relative to the centrage of Part I at the certain distance that radially staggers to the left of sealing ring 115。So, after dust cover 110 and power tool body 120 groups are joined, cover body 112 will not produce the interference on position with power tool body 100, it is simple to provides the cover body 112 that volume is bigger。

Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded。

Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope。It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model。Therefore, the protection domain of this utility model patent should be as the criterion with claims。

Claims

1. a dust cover, it is characterised in that including:

2. dust cover according to claim 1, it is characterised in that described cover body also includes dust mouth, described dust mouth is connected to dust guiding tube or removable dust bag。

3. dust cover according to claim 1, it is characterised in that the inner surface that described sealing ring is positioned within cover body is formed with slope。

4. dust cover according to claim 1, it is characterised in that being also equipped with bearing in described drill bit bore, described locating ring is fixed on the inner ring of described bearing。

5. dust cover according to claim 1, it is characterised in that the internal diameter of described locating ring is more than the internal diameter of described sealing ring。

6. dust cover according to claim 1, it is characterised in that described cover body has telescopic elastic part, and described dust collecting opening is located on described elastic part。

7. dust cover according to claim 6, it is characterised in that described cover body includes fixed cover and is connected to the elastic sleeve of fixed cover, and described drill bit bore is positioned on the wall of described fixed cover, and dust collecting opening is the free port of elastic sleeve。

8. dust cover according to claim 1, it is characterised in that the cylindrical of described sealing ring is formed with groove, and described sealing ring is coordinated with the projection on described cover body rotatably by described groove。

9. a power tool, including power tool body and work head, it is characterized in that, also include the dust cover as described in any one of claim 1 to 8, wherein, described work head stretches into inside described cover body through described drill bit bore, described work head and described sealing ring interference fit, described work head and described locating ring matched in clearance。

10. power tool according to claim 9, it is characterised in that the internal diameter of described sealing ring, locating ring internal diameter, and the reference dimension that work head matches with described sealing ring and locating ring partly is 10 millimeters。

11. power tool according to claim 9, it is characterised in that tightened together by larynx hoop or band between described dust cover with described power tool body。