CN113954031A

CN113954031A - Fixing device for a suction device and suction device

Info

Publication number: CN113954031A
Application number: CN202110817215.2A
Authority: CN
Inventors: A·乌尔里希; J·迪特尔; M·魏斯; M·海吉斯
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2020-07-20
Filing date: 2021-07-20
Publication date: 2022-01-21
Also published as: DE102020209074A1

Abstract

The invention relates to a fastening device for a suction device, wherein the fastening device has a first fastening interface for detachably fastening the fastening device to a hand-held power tool, in particular an auxiliary handle of the hand-held power tool, and a second fastening interface for, in particular, selectively fastening the suction device or a suction hose to the fastening device. It is proposed that the fastening device be designed in such a way that the suction device can be held completely by the hand-held power tool.

Description

Fixing device for a suction device and suction device

Technical Field

The invention relates to a fixing device for a suction device and a suction device.

Background

DE202012007437U1 describes a suction device for a hand-held power tool having a telescopic unit.

Disclosure of Invention

The invention relates to a fastening device for a suction device, wherein the fastening device has a first fastening interface for detachably fastening the fastening device to a hand-held power tool, in particular to an auxiliary handle of the hand-held power tool, and a second fastening interface for fastening, in particular selectively fastening, the suction device or a suction hose to the fastening device. It is proposed that the fastening device be designed in such a way that the suction device can be held completely by the hand-held power tool.

The fastening device is preferably designed as an attachment for a hand-held power tool, wherein the hand-held power tool can also be used without an attachment. The fastening device is provided in particular for assisting in the suction of dust products, such as drilling dust/grinding dust/sawing dust, which are produced during the machining of the workpiece by the hand-held tool. The fastening device has in particular an air channel through which, in operation, an air flow is guided to the suction device. The fixture preferably has no dust chamber, filter unit and fan unit. The air flow can be generated in particular by means of a fan unit of the suction device. The fan unit comprises at least one fan element, which can be designed as a radial fan or an axial fan, for example.

A "hand-held power tool" is to be understood to mean, in particular, a power tool which is held by a hand during operation. The hand-held power tool can be designed, for example, as a mains-operated appliance. It is also conceivable for the hand-held power tool to be designed as a rechargeable-battery hand-held power tool, wherein the rechargeable-battery hand-held power tool preferably has a rechargeable-battery interface, via which the rechargeable-battery hand-held power tool is detachably connected to a hand-held power tool rechargeable-battery pack. In the context of the present application, "detachably connected" is to be understood in particular as being detachably connected without tools. The hand-held power tool battery pack is preferably designed to be replaceable. The hand-held power tool is designed in particular for producing a borehole in a workpiece. The hand-held power tool can be embodied, for example, as a drill, a drill driver, a rotary hammer drill, a hammer drill, an electric hammer, etc. The hand-held power tool comprises a drive unit, which has, in particular, an electric motor. The drive unit is preferably designed for transmitting a drive movement via a transmission unit having a workpiece receiver. The workpiece receiving portion is configured to detachably connect the application tool to the workpiece receiving portion. The application tool received in the workpiece receiver is configured to be driven in a rotary manner about a working axis of the hand-held power tool and/or in a linear oscillation manner along the same. An "additional handle" is to be understood to mean, in particular, a handle which can be connected to a housing of a hand-held power tool without tools, which is preferably used for heavy hand-held power tools, such as, for example, hammers or angle grinders. Two-handed operation of the hand-held power tool is achieved by means of the additional handle.

The suction device is designed in particular for sucking drill cuttings or drill dust during drilling or from the drill hole. In the context of the present application, a "suction device" is to be understood to mean, in particular, a small and compact suction device whose weight and/or size is smaller than the weight and/or size of the hand-held power tool. The suction device is particularly free of advancing means, such as rollers, which are commonly used in household or industrial cleaners. The suction device has a coupling interface which is provided for connecting the suction device to the fixing device. The coupling interface can additionally also be provided for a detachable connection to the suction hose. The air flow generated by the suction device is guided by means of the fixing device to the processing site where the tool is applied. The suction device comprises a fan unit with a fan element. The fan element can be designed, for example, as an axial fan, a radial fan, a diagonal fan or a tangential fan. In addition, the suction device includes a dirt collection chamber configured to receive dust or drill cuttings. Furthermore, the suction device comprises a filter unit, which preferably has a HEPA filter. The suction device preferably further comprises a filter cleaning unit configured to clean the filter unit. The filter cleaning unit can be realized, for example, by a thrust reversal, wherein the flow direction of the air flow in the suction device is reversed in order to clean the filter unit by the air flow. Alternatively, it is also conceivable for the filter cleaning unit to function mechanically, for example as an ultrasonic filter cleaning. It is additionally conceivable for the suction device to have an electronic system which is designed to control or regulate the suction device. The electronic device can have a communication unit which is designed to exchange data or information. The communication unit can be configured, for example, for exchanging data via bluetooth, WiFi, light, vibration, magnetic fields, etc. In particular, a wireless information exchange with the hand-held power tool can be effected via the communication unit, so that, for example, an activation signal of the hand-held power tool can be transmitted to the suction device, so that the suction device is automatically activated with the hand-held power tool. It is also conceivable for the electronics to control the suction device in such a way that the fan unit has a supplementary operating time. It is also conceivable that the electronic device can be set up by the user via a communication unit, for example via a smartphone. This enables, for example, the power of the suction device to be adjusted.

"selectively fastening" is to be understood in particular to mean that the suction device can be connected directly to the fastening device, or that the suction device or, for example, an industrial vacuum cleaner can be connected indirectly to the fastening device via a suction hose.

In this context, "completely holding the suction device on the fastening device" is to be understood to mean, in particular, that the suction device can be coupled to the hand-held power tool via the fastening device in such a way that the suction device completely follows the movement of the hand-held power tool.

It is also proposed that the fastening device has a suction head connection for detachably connecting the suction head. Advantageously, a better reception of dust products at the workpiece can thereby be provided. The suction head has in particular a dust receiving opening which is arranged on the workpiece side in the connected state with the fastening device. In particular, the suction head is designed and arranged in such a way that it rests against the workpiece during the machining of the workpiece. The suction head preferably has an application tool receptacle through which the application tool can be passed and in which the application tool is arranged in part during operation.

In particular, the first fixing interface is configured to be movable relative to the second fixing interface, in particular relative to the suction head interface. Advantageously, it can thus be ensured, by way of example, that the suction is always carried out next to the workpiece. The relative movement between the first and second fastening interfaces is preferably realized by a linear movement parallel to the working axis of the hand-held power tool. The fixing device preferably has a restoring element which acts on the second fixing device with a force in the direction of the workpiece and/or in the direction of the suction head. The restoring element is preferably designed as a spring element, for example a metallic helical spring.

Furthermore, it is proposed that the fastening device has a telescopic unit. The telescopic unit is especially designed for movably connecting the suction head.

It is further proposed that the fastening device has a suction drill adapter which is designed to connect the suction head connection to the suction drill. Advantageously, the fastening device can thereby be connected to the suction drill. A "suction drill head" is to be understood to mean, in particular, an application tool which has a transport channel between a drill head and an insertion end. The transport channel is designed in particular for transporting a fluid, preferably an air flow, in the drilling tool. The transport channel is preferably arranged for sucking away drill cuttings in the borehole during the drilling process. The drill cuttings are preferably transported counter to the feed direction of the drilling tool. The transport channel has a suction opening and a suction opening, the distance between which corresponds to the length of the transport channel. The transport channel can be configured eccentrically or concentrically with respect to the longitudinal extension of the suction drill head. The suction opening is arranged in the region of the drill bit, wherein dust products enter the transport channel through the suction opening. The suction opening is preferably arranged in the region of the shaft, wherein the dust products leave the transport channel through the suction opening. The suction drill adapter connects the fastening device, in particular in terms of flow technology, to the suction opening.

Furthermore, it is proposed that the fastening device has a depth stop unit and/or a locking unit. Advantageously, the operability of the telescopic unit can thereby be improved. The depth stop unit is in particular designed to limit the preferably axial movability of the first fixing interface relative to the second fixing interface, in particular relative to the telescopic unit, in a single direction. The locking unit is in particular designed to limit the axial movability of the first fastening interface relative to the second fastening interface, in particular the telescopic unit, in two opposite directions, preferably to fasten the telescopic unit such that no relative movement of the suction head interface occurs.

It is further proposed that the second fastening interface has at least one first fastening element for a force-locking and/or form-locking connection. In particular, the second fastening interface has at least one guide element for guiding the suction device during the connection process.

It is further proposed that the second fastening interface has a second fastening element, wherein the first fastening element and the second fastening element are arranged at different positions. Advantageously, a secure holding of the suction device can thereby be achieved. Preferably, the first fixing interface is arranged between the first and second fixing elements of the second fixing interface, viewed along the longitudinal extension of the suction device. The distance between the first and second fastening elements of the second fastening interface can be rigid or adjustable or flexible. In particular, the spacing between the first and second fastening elements of the second fastening interface corresponds to at least 50%, preferably 75%, preferably 90%, of the length of the suction device. In particular, the distance between the first and second fastening elements of the second fastening interface corresponds to at least 50%, preferably 75%, preferably 90%, of the maximum distance between the first fastening interface and the second fastening interface.

The invention further relates to a suction device for a fastening device as described above, having a housing in which a drive unit and a fan unit are arranged, and having an energy supply unit for supplying the drive unit with energy. It is proposed that the suction device has a cylindrical filter. Advantageously, a particularly compact suction device can thereby be provided. The energy supply unit can be designed, for example, as a battery cell or a battery pack, in particular a hand-held power tool battery pack. The suction device preferably comprises a battery interface for the detachable electrical and mechanical connection to the battery pack. The cylindrical filter can be embodied, for example, as a flat pleated filter (Flachfaltenfilter).

It is further proposed that the suction device has a dust collecting container with a replaceable collecting bag. Advantageously, a quick and substantially dust-free emptying of the dust collecting container can thereby be achieved.

Drawings

Other advantages result from the following description of the figures. The figures, description and claims contain many combinations of features. The person skilled in the art can also appropriately consider the features mentioned individually and combine them into meaningful further combinations.

The figures show:

fig. 1 shows a side view of a fastening device according to the invention, which is connected to a suction device and a hand-held power tool;

fig. 2 shows a section through the fixing device according to fig. 1;

FIG. 3 shows a perspective view of the fixture;

FIG. 4 shows a perspective view of the fastening device in a state in which it is connected to an additional handle;

FIG. 5 shows a perspective view of an alternative suction head;

FIG. 6 shows a perspective view of another alternative embodiment of the suction head;

fig. 7 shows a perspective view of the fastening device connected to the suction hose.

Detailed Description

Fig. 1 shows a side view of a fastening device 10 according to the invention in a fastened state on a hand-held power tool 100.

The hand-held power tool 100 is configured in the form of a drill hammer 104. The hand-held power tool 100 has a housing 106, which is designed as an outer housing. In the housing 106, a drive unit 108 is arranged, which comprises an electric motor. The drive unit 108 is connected to a workpiece receiving portion 112 via a transmission unit 110 comprising a pneumatic impact mechanism.

The workpiece receiving portion 112 is configured to removably receive an application tool 114. The application tool 114 is illustratively configured as a flat chisel. The application tool 114 received in the workpiece receiver 112 can be driven by the drive unit 108 and the transmission unit 110 into a rotary motion about a working axis 116 of the hand-held power tool 100 and into a linear oscillation along the working axis 116 of the hand-held power tool 100.

The hand-held power tool 100 comprises a handle 117 on which the hand-held power tool 100 is held and guided during operation. The handle 117 is associated with the housing 106 of the hand-held power tool 100 and is at least partially formed integrally therewith. An operating switch 118 for switching the hand-held power tool 100 on and off and a direction of rotation switch 119 for setting the direction of rotation are arranged on the handle 117. Furthermore, the hand-held power tool 100 has a battery interface 120, which is designed to detachably connect the hand-held power tool 100 to a hand-held power tool battery pack 122.

In the region of the workpiece receiver 112, the hand-held power tool 100 has an additional handle 124. The additional handle 124 is detachably connected to the hand-held power tool 100. The additional handle 124 has a handle region 126 for gripping the additional handle 124 by a user and a connection region 128 for connecting the additional handle 124 to the hand-held power tool 100. In the connecting region 128, the hand-held power tool 100 is completely enclosed by the additional handle 124. The connecting region 128 of the additional handle 124 is configured to be adjustable in size by means of an operating element 130.

Furthermore, the additional handle 124 has a fastening interface 132, by means of which the additional handle 124 is detachably connected to the fastening device 10.

The fastening device 10 has a first fastening interface 12 for detachably fastening the fastening device 10 to the hand-held power tool 100 and a second fastening interface 14 for fastening the suction device 200 to the fastening device 10. The second fastening interface 14 is designed in such a way that the suction device 200 can be held completely and with its entire weight by the hand-held power tool 100. The gettering device 200 includes a coupling interface 202 for detachably connecting the gettering device 200 with the second fixing interface 14 of the fixing device 10.

Fig. 2 shows a section of the fastening device 10 in a fastened state with the additional handle 124 and with the suction device 200. Fig. 3 shows a perspective view of the fastening device 10.

The fixing interface 132 of the additional handle 124 illustratively has two opposing channels 134 which are delimited on three sides along their extension by walls 136.

The first fixing interface 12 of the fixing device 10 has a form-locking element 16 in the form of a guide rail 17 corresponding to the channel 134 of the additional handle 124. The first fixing interface 12 illustratively has two guide rails 17 which are arranged together in a T-shape. In order to connect the fastening device 10 to the additional handle, the channel 134 and the guide rail 17 are thus brought into engagement by being pushed into each other.

In order to axially fix the fastening device 10 to the additional handle 124, the first fastening interface 12 has a fixing element 18 (see fig. 3), which is mounted so as to be movable. The locking element 18 is exemplary mounted so as to be linearly movable, but it is also conceivable for the locking element 18 to be additionally or alternatively configured so as to be rotationally movable. The locking element 18 is configured to be movable in a direction which intersects the longitudinal extension direction of the guide rail 17 and is arranged, by way of example, perpendicularly to the longitudinal extension direction of the guide rail 17. The locking elements 18 are configured as lugs which project outwards or downwards. The additional handle 124 has a notch in the region of the channel 134 corresponding to the locking element 18, which notch is provided for forming a form-fit in the axial direction. To facilitate the release of the form-locking, the first fastening interface 12 comprises an actuating element 20, which is fixedly connected to the locking element 18. The actuating element 20 and the locking element 18 are in particular formed integrally with one another. Preferably, the locking element 18 is acted upon with a force in the direction of the locking position by means of a restoring element (not shown), so that a latching connection is established.

The second fastening interface 14 has a first fastening element 22, which is designed as a suction connector 24. The suction nozzle 24 is substantially hollow-cylindrical in design and has recesses 26 (see fig. 3) in its wall, which are designed to receive corresponding latching lugs of the coupling interface 202 of the suction device 200.

The second fastening interface 14 also has a second fastening element 28, which is arranged at a distance from the first fastening element 22. The second fastening element 28 is arranged on the end face and is configured as an example as a form-locking element 30 in the form of a rectangular projection 32.

The fixture 10 also has a suction head interface 34 configured to detachably connect the fixture 10 to a suction head 36. The suction head 36 is provided for an application tool 114, for example a chisel, having a very large application tool head. Fig. 5 and 6 show perspective views of alternative embodiments of

suction heads

36a, 36b, which can also be connected to fastening device 10 via suction head connection 34. The suction head 36 has a connecting element 40 for the non-positive and/or positive connection of the suction head 36 to the suction head connection 34. The suction head interface 34 illustratively has a suction head receptacle 42 into which the suction head 36 can be inserted. The suction head 36 also comprises an application tool receptacle 44 through which an application tool 114 can be passed and in which the application tool 114 is arranged in part during operation. Furthermore, the suction head 36 has a bellows 45 which substantially completely surrounds the application tool receptacle 44.

The first fixed connection 12 is connected to the suction connection 34 so as to be movable relative to it. The suction head interface 34 is fixedly connected to the guide rod 46. The first fastening interface 12 is connected to the guide rod 46 in an axially movable manner, wherein the axial movability is delimited by two stops 48, one of the stops 48 being formed by the suction head interface 34, and the other stop 48 being arranged at the end of the guide rod 46 on the end side. Additionally, the guide rod 46 has an adjustable depth stop 38, which further limits the axial movability and can be adjusted by the user. The guide rod 46 has a receptacle 50 in which a restoring element 52, for example in the form of a helical spring, is arranged. The restoring element 52 is designed in particular to act on the suction head connection 34 with a force directed in the direction of the workpiece to be machined. The restoring element 50 bears on one side against the first fastening device 10 and on the opposite side against the suction connection 34. Advantageously, this ensures that the suction head 36 is always in contact with the workpiece during operation.

The application tool receptacle 44 comprises two openings, wherein the workpiece-side opening 54 is provided as a suction opening through which, in operation of the suction device 200, an air flow 201 enters the fastening device 10. In the fastening device 10, the air flow 201 is conducted to the second fastening interface 14, in particular to the suction connection 24, where the air flow 201 passes into the suction device 200.

The suction device 200 comprises a fan unit 210, which is driven by a drive unit 212. The drive unit 212 includes an electric motor 214. The fan unit 210 comprises a fan 216, which is connected to the motor shaft 215 of the electric motor 214 in a rotationally fixed manner. The energy supply of the drive unit is carried out, for example, via a hand-held power tool battery pack 122, which is electrically and mechanically connected to the suction device 200 via a battery interface 218.

The battery interface 218 of the suction device 200 corresponds, for example, substantially to the battery interface 120 of the hand-held power tool 100, so that the same hand-held power tool battery pack 122 can be used for the suction device 200 and the hand-held power tool 100. The hand-held power tool battery pack 122 has a battery pack housing 138, in which five battery cells 140 are arranged by way of example. The hand-held power tool battery pack 122 has a locking unit, not shown, with which the hand-held power tool battery pack 122 can be locked to the suction device 200 or to the hand-held power tool 100.

The extraction device 200 also has a dust chamber 220 configured to receive dust products. The dust chamber 220 has a substantially hollow cylindrical base body 222, which is preferably made of a transparent material, in particular plastic. A filter unit 224 is arranged in the dust chamber 220, which filter unit 224 is configured for filtering the air flow 201. The filter unit 224 illustratively comprises a cylindrical filter 226 configured as a flat pleated filter. The drive unit 212 is arranged within the filter unit 224. In particular, the electric motor 214 is substantially completely surrounded by the filter unit 224.

In order to achieve a particularly compact design of the suction device 200, a plane perpendicular to the motor axis 217 of the motor shaft 215 intersects the dust chamber 220, the filter unit 224, the drive unit 212, the fan unit 210 and the battery interface 218 along the motor axis 217 in the listed order. The filter unit 224 is preferably arranged such that it does not intersect the motor axis 217. Illustratively, the flat pleated filter 226 is arranged coaxially with the motor axis 217.

The battery interface 218 of the getter device 200 is arranged on the side of the getter device 200 opposite the coupling interface 202. The coupling interface 202 includes a nipple 230 configured to be removably connectable with the suction nipple 24 of the fixture 10. In particular, the socket 230 of the suction device 200 has a latching means 232, which engages in the recess 26 of the suction socket 24.

In order to achieve a secure hold of the suction device 200 on the fastening device 10, the coupling interface, in addition to the connector piece 230, has a second fastening means 234 on the opposite side of the suction device 200, in particular in the region of the battery interface 218. The second fastening means 234 is designed as a rectangular recess in the extension 236, which corresponds to the rectangular projection 32 of the fastening device 10.

In fig. 7, the fastening device 10 is connected to the hand-held power tool 100 via the additional handle 124 via the first fastening interface 12. In fig. 7, the additional handle 124 has been rotated by 90 ° compared to fig. 1 and is connected to the hand-held power tool 100, so that the handle region 126 of the additional handle 124 points downward. In contrast to fig. 1, the fastening device 10 is not connected to the suction device 200 via the second fastening interface 14, but rather to a suction hose 300 of an industrial vacuum cleaner, which is not shown. The suction hose comprises at its end a nipple 302 which substantially corresponds to the nipple 230 of the suction device 200. Alternatively, an adapter is also conceivable, which comprises a connecting piece and is designed to be connectable to a suction hose. In the case of connection with the suction hose 300, only the first fixing element 22 of the second fixing interface 14 is used, and the second fixing element 28 is not used.

Claims

1. Fastening device for a suction device, wherein the fastening device (10) has a first fastening interface (12) for detachably fastening the fastening device (10) to a hand-held power tool (100), in particular to an additional handle (124) of the hand-held power tool (100), and a second fastening interface (14) for selectively fastening, in particular, the suction device (200) or a suction hose (300) to the fastening device (10),

it is characterized in that the preparation method is characterized in that,

the fastening device (10) is designed in such a way that the suction device (200) can be completely held by the hand-held power tool (100).

2. A fixture according to claim 1, characterised in that the fixture (10) has a suction head interface (34) for detachably connecting a suction head (36).

3. A fixation device according to any one of the preceding claims, wherein the first fixation interface (12) is configured to be movable relative to the second fixation interface (14), in particular relative to the suction head interface (34).

4. A fixture according to any one of claims 2-3, characterized in that the fixture (10) has a suction bit adapter configured for connecting the suction head interface (34) with a suction bit.

5. A fixation device as claimed in any one of the foregoing claims, characterized in that the fixation device (10) has a depth stop unit (38).

6. A fixation device as claimed in any one of the foregoing claims, characterized in that the second fixation interface (14) has at least one first fixation element (22) and a second fixation element (28) for a force-and/or form-fitting connection.

7. A fixation device as claimed in any one of the foregoing claims, characterized in that the second fixation interface (14) has at least one guide element for guiding the suction device (200) during connection.

8. A fixation device according to any one of claims 6 to 7, characterized in that the first fixation element (24) and the second fixation element (28) are arranged in different positions.

9. Suction device for a fastening device (10) according to one of claims 1 to 8, having a housing in which a drive unit (212) and a fan unit (210) are arranged, and having an energy supply unit for supplying energy to the drive unit (212),

it is characterized in that the preparation method is characterized in that,

the suction device (200) has a cylindrical filter (226).

10. The extraction device according to claim 9, wherein the extraction device (200) has a dust chamber (220) comprising a replaceable collecting bag.