Suction device for a blasting hammer

Abstract

A suction device for a demolition hammer is disclosed, wherein the demolition hammer has a housing and a tool fitting for receiving a demolition chisel, wherein the suction device has a flexible suction hose, on the free end of which a suction body is connected, via which the dust is sucked from the working area of the demolition chisel, wherein the suction device has a fastening element by means of which the suction hose can be mounted on the housing of the demolition hammer at a fastening point of the suction hose, the suction hose being spaced apart from the free end, as a result of which the suction body can pivot freely at least in the radial direction relative to the demolition chisel during the suction operation.

Description

TECHNICAL FIELD

[0001] The invention relates to a suction device for a breaking hammer, wherein the breaking hammer has a housing and a tool fitting for receiving a breaking chisel. The suction device is equipped with a flexible suction hose, on the free end of which a suction body is connected. Dust can be sucked from the working area of the breaking chisel via the suction body. BACKGROUND

[0002] In principle, suction devices of this type are known from the prior art. Thus, during heavy breaking work, for example, a suction body in the form of a suction sleeve fitted on the breaking chisel is used. SUMMARY

[0003] The object of the invention is to provide a suction device which facilitates safe operation by the user.

[0004] This object is achieved by a suction device having a fastening element by means of which the suction hose can be mounted on the housing of the breaking hammer at a fastening point of the suction hose, the suction hose being spaced apart from the free end, so that the suction body can be pivoted freely relative to the breaking chisel, in particular in the radial direction, during the suction operation. It has proved advantageous if the fastening point of the suction hose defines a pivot point about which the suction hose can be pivoted together with the suction body.

[0005] The invention comprises the finding that a disadvantage of the suction devices of the prior art is that the suction body has to be fitted on the breaking chisel. A disadvantage is, for example, that the suction body can fall off or even be damaged if chiseling is carried out on an edge or in extracted material. Another disadvantage is that the user cannot see the edge of the breaking chisel or at least has a greatly restricted view. Furthermore, as the wear of the breaking chisel increases, it is typically no longer possible to use the suction body, since the suction body can slip off the breaking chisel.

[0006] In contrast, an improved suction device is provided according to the invention, the suction body of which can be pivoted freely relative to the breaking chisel at least in the radial direction during the suction operation. The key advantage of this is that the breaking chisel can always be observed freely, which is important in particular in the case of heavy breaking hammers. As a result, user safety is greatly improved. The fact that the suction body can be pivoted relative to the breaking chisel additionally prevents the suction body from slipping axially towards the breaking chisel or even being damaged. In particular, it has proved that the suction body is hardly ever caught, for example when chiseling on an edge or in extracted material. As a result, it is ensured that dust is continuously sucked from the working area of the breaking chisel at all times and, thus, the health of the user is ensured.

[0007] In a particularly preferred embodiment, the fastening element is in the form of a retaining clip (spring clip). It has proven advantageous for the retaining clip to have an eye which is designed to grip around the extraction hose, preferably completely. In a further preferred embodiment, the diameter of the eye can be widened by manual actuation, preferably in such a way that the eye can be displaced along the length of the extraction hose. Thus, the position, in particular the axial position, of the extraction body relative to the blast chisel can be varied. Thus, the position of the extraction body can be simply adjusted in accordance with any wear of the blast chisel. It has proven advantageous for the manual actuation to be carried out against the spring pretension exerted by the retaining clip.

[0008] It has proven advantageous for the retaining clip to have two holding arms. In a particularly preferred embodiment, these holding arms are designed to engage in two mounting openings in the housing of the blast hammer. The mounting openings can be, for example, cutouts in the housing into which housing screws, for example, sink. In a particularly preferred embodiment, the spring pretension exerted by the retaining clip described has been described for retaining the holding arms in the respective mounting openings. In a further preferred embodiment, a further fastening element in the form of a retaining clip is provided.

[0009] In a further preferred embodiment, the extraction body has an extraction cover. The extraction cover can have extraction grooves which extend in the axial direction along the extraction cover. In a particularly preferred embodiment, the extraction grooves open into extraction channels located in the interior of the extraction cover. It has proven advantageous for the extraction cover to have a plurality of extraction grooves. In a particularly preferred embodiment, the extraction grooves are arranged uniformly spaced apart from one another along the circumferential direction of the extraction cover. In a further preferred embodiment, each of the extraction grooves opens into a respective extraction channel.

[0010] In a similar preferred embodiment, the extraction body has a carrier to one side of which the extraction hose can be fastened and to the other side of which the extraction cover is fastened. It has proven advantageous for the extraction channels to open into a connection region of the carrier as such. In a particularly preferred embodiment, the connection region of the carrier opens into the extraction hose. It has proven advantageous for the carrier to have a plurality of latching lugs which are arranged uniformly spaced apart from one another along the circumferential direction of the carrier. The carrier can be connected to the extraction cover again releasably by means of the latching lugs.

[0011] Furthermore, it has proven advantageous for the carrier to have an internal thread into which the extraction hose can be screwed. In a particularly preferred embodiment, the extraction cover and the carrier are joined to one another, for example, via a press fit. It has proven advantageous for the extraction cover and the carrier to be designed as different components. The extraction cover and the carrier can be provided, for example, in a single piece by means of an additive manufacturing method. It has proven advantageous for the extraction body not to enclose the blast chisel during the desired extraction operation.

[0012] The invention is also achieved by using a suction device of the above-mentioned type for sucking up dust from a work area of a blast chisel which is received in a tool assembly of a blast hammer.

[0013] The subject matter which can be protected independently is provided by a suction device for a hand-held power tool, wherein the hand-held power tool has a housing and a tool assembly for receiving a tool, wherein the suction device has a flexible suction hose, on the free end of which a suction body is connected, via which dust is sucked up from a work area of the tool, and wherein the suction device has a fastening element by means of which the suction hose can be mounted on the housing of the hand-held power tool at a fastening point of the suction hose, which is spaced apart from the free end, as a result of which the suction body can be pivoted freely at least in the radial direction relative to the tool during the suction operation.

[0014] Further advantages will become apparent from the following description of the drawings. Various exemplary embodiments of the invention are shown in the drawings. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider these features individually and combine them to form useful further combinations. BRIEF DESCRIPTION OF DRAWINGS

[0015] In the drawings, identical and similar components are denoted by the same reference signs. In the drawings:

[0016] Figure 1 A first preferred exemplary embodiment of a suction device is shown;

[0017] Figure 2 A fastening element of a suction device of Figure 1 is shown;

[0018] Figure 3 A suction device of Figure 1 is shown, which has two fastening elements;

[0019] Figure 4 A suction body of a suction device of Figure 1 is shown;

[0020] Figure 5 An exploded view of a suction body of Figure 4 is shown. DETAILED DESCRIPTION

[0021] Figure 1A first preferred exemplary embodiment of a suction device 100 according to the present application is shown. The suction device 100 is arranged on a heavy demolition hammer 200. The demolition hammer 200 can also be referred to as a chipping hammer or a floor breaker. The demolition hammer 200 has a housing 210 and a tool assembly 220. In the tool assembly 220 a demolition chisel 250 is positioned, which is used for chipping work along an axial direction AR. The suction device 100 has a flexible suction hose 10, which has a diameter of approximately 35 mm. A suction body 20 is connected to a free end 11 of the suction hose 10. Dust can be sucked from a work area AB of the demolition chisel 250 via the suction body 20 and the suction hose 10. This is for example achieved by means of a construction site vacuum cleaner (not shown here).

[0022] The suction device 100 has a fastening element 30, by means of which the suction hose 10 is mounted on the housing 210 of the demolition hammer 200. Here, the fastening element 30 is mounted at a fastening point 13 of the suction hose 10, which is spaced apart from the end 11 of the suction hose 10. Thus, during the suction operation, the suction body 20 can be freely pivoted at least in a radial direction RR with respect to the demolition chisel 250. A key advantage of this is that the demolition chisel 250 can always be freely observed, which is particularly important in the case of heavy demolition hammers 200 of the type shown in Figure 1 The fastening point 13 defines a pivot point SP, about which the suction hose 10 can be pivoted together with the suction body 20.

[0023] As can be gathered from Figure 1 , the fastening element 30 is in the form of a retaining clip 31 (see Figure 2 ). The retaining clip 31 has an eye 33, which is designed to be clamped completely around the suction hose 10. The diameter DM of the eye 33 (see Figure 2 ) can be widened by means of manual actuation, so that the eye 33 can be displaced along the length LS of the suction hose 10. The position of the suction body 20 with respect to the demolition chisel 250 can thus be changed in the axial direction AR. The retaining clip 31 has two holding arms 35, which are designed to engage in two mounting openings 211 in the housing 210 of the demolition hammer 200 (only one of these mounting openings can be seen in Figure 1 In the currently shown exemplary embodiment, the mounting openings 211 are cutouts in the housing 210, into which housing screws sink. Figure 1 It can be clearly seen in

[0024] With reference to Figure 2 , the function of the retaining clip 31 will now be explained more precisely. Figure 1The suction device 100 has a fastening element 30. The fastening element 30 is in the form of a retaining clip 31. Figure 2 A shows a plan view of the retaining clip 31 (in Figure 1 (Viewed from above in the axial direction AR). Figure 2 Figure B shows a side view of the retaining clip 31, and Figure 2 Figure C shows a perspective view. The circular eyelet 33 of the retaining clip 31 is designed to fully clamp the suction hose 10 (see Figure C). Figure 1 Around. For example, the diameter DM of the eyelet 33 is 35 mm and is customized according to the diameter of the suction hose 10.

[0025] The eyelets 33 of the retaining clip 31 extend on both sides into the corresponding retaining arms 35. The retaining arms are configured to engage in two mounting openings 211 in the housing 210 of the blasting hammer 200 (see...). Figure 1 ). The HF can be manually actuated ( ). Figure 2 (The thick solid arrow in A) widens the orifice 33. Therefore, the orifice 33, widened to, for example, a diameter DM of 45 mm, can be moved as needed along the suction hose. Here, the manual actuation force HF is against the preload force VF (…). Figure 2 (The thick dashed arrow in A) is applied. The retaining clip 31 can be produced in a technically ingenious, simple and relatively cost-effective manner (the retaining clip can be made, for example, from spring steel bent into a single piece).

[0026] Figure 3 Displayed in proportion Figure 1 The suction device 100 includes a suction hose 10 held by an additional fastening element 30' that engages in another mounting opening 211' in the housing 210. The additional fastening element 30' is structurally identical to the fastening element 30. However, the additional fastening element 30' does not define an additional pivot point for the suction hose 10, but is only used to secure the suction hose 10 (additionally) to the housing 210.

[0027] Figure 4 and Figure 5 The extraction body 20 is shown in detail. In the present case, for example, the extraction body 20 is constructed as two parts and has an extraction hood 21 and a support member 27. (As can be seen from...) Figure 4 Therefore, the extraction hood 21 has a plurality of extraction slots 23, which are arranged to be evenly spaced from each other along the circumferential direction UR of the extraction hood 21. Dust can be sucked up through these extraction slots 23. Relatively large debris cannot pass through these extraction slots 23. The extraction hood 21 has a plurality of extraction orifices 24 at its end sides, which are themselves arranged to be evenly spaced from each other along the circumferential direction UR of the extraction hood 21.

[0028] It is possible Figure 5 As clearly seen in section B, each of these extraction slots 23 leads into a corresponding extraction channel 25 formed inside the extraction hood 21. A central connecting region 28 is arranged at the center of the extraction hood 21, into which all extraction channels 25 lead. A corresponding connecting region 28' is formed at the center of the carrier 27, where dust is conveyed to the extraction hose (not shown) during extraction operation. The extraction hose itself is screwed into the internal thread 29 of the carrier 27. (The last sentence appears to be incomplete and possibly refers to a different document.) Figure 5 The resulting carrier 27 has a plurality of latch lugs 26 arranged to be evenly spaced apart from each other along the circumferential direction UR. The carrier 27 can be releasably connected to the fume hood 21 via the latch lugs 26. During the desired fume extraction operation, the fume extraction body 20 formed by the fume hood 21 and the carrier 27 does not close the blasting chisel 250.

[0029] List of reference numerals

[0030] 10 suction hoses

[0031] 11. Free end of the suction hose

[0032] 13, 13' Fastening Point

[0033] 20 air extraction unit

[0034] 21 extraction hood

[0035] 23 air extraction slots

[0036] 24 air extraction ports

[0037] 25 exhaust channels

[0038] 26 latch lugs

[0039] 27 load-bearing components

[0040] 28' connection area

[0041] 29 internal thread

[0042] 30, 30' Fastening Components

[0043] 31, 30' retaining clips

[0044] 33-hole eye

[0045] 35-inch holding arm

[0046] 100 suction devices

[0047] 200 Explosive Hammer

[0048] 210 housing

[0049] 211, 211' mounting opening

[0050] 220 tool fitting

[0051] 250 blast chisel

[0052] AB work area

[0053] AR axial direction

[0054] DM diameter

[0055] HF hand force

[0056] LS length of suction hose

[0057] RR radial direction

[0058] SP pivot point

[0059] UR circumferential direction

[0060] VF pretension force.

Claims

1. A blasting hammer (200) comprising a housing (210), a tool assembly (220) for receiving a blasting chisel (250), and a suction device (100), wherein, The suction device (100) has a flexible suction hose (10), to which a suction body (20) is connected. Dust is sucked up from the working area (AB) of the blasting chisel (250) via the suction body. The suction device (100) has a fastening element (30) that allows the suction hose (10) to be mounted on the housing (210) of the blasting hammer (200) at a fastening point (13). The suction hose is spaced apart from the free end (11). As a result, during the suction operation, the suction body (20) can pivot freely in the radial direction (RR) relative to the blasting chisel (250). The suction body (20) has a suction hood (21). The fume hood (21) has fume extraction slots (23) extending along the fume hood (21) in the axial direction (AR), wherein the fume extraction slots (23) lead into a fume extraction channel (25) located inside the fume hood (21), and wherein the fume hood (21) has a plurality of fume extraction slots (23) arranged to be evenly spaced apart from each other along the circumferential direction (UR) of the fume hood (21), wherein each fume extraction slot (23) leads into a corresponding fume extraction channel (25).

2. The blasting hammer (200) as described in claim 1. Its features are, The fastening element (30) is in the form of a retaining clip (31).

3. The blasting hammer (200) as described in claim 2. Its features are, The retaining clip (31) has an eyelet (33).

4. The blasting hammer (200) as described in claim 3. Its features are, The orifice is designed to be completely clamped around the suction hose (10).

5. The blasting hammer (200) as described in claim 3 or 4. Its features are, The diameter (DM) of the orifice (33) can be widened by manual actuation, so that the orifice (33) can be moved along the length (LS) of the suction hose (10).

6. The blasting hammer (200) as described in any one of claims 2 to 4. Its features are, The retaining clip (31) has two retaining arms (35) which are designed to engage in two mounting openings (211) in the housing (210) of the blasting hammer (200).

7. The blasting hammer (200) as described in any one of claims 1 to 4. Its features are, The suction body (20) has a carrier (27), the suction hose (10) can be fastened to one side of the carrier, and the suction hood (21) is fastened to the other side of the carrier.

8. The blasting hammer (200) as described in any one of claims 1 to 4. Its features are, During the desired evacuation operation, the evacuation body (20) does not seal the blasting chisel (250).

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