WO2012019816A1

WO2012019816A1 - Device for surface treatment, in particular a grinder, polisher, or the like

Info

Publication number: WO2012019816A1
Application number: PCT/EP2011/060359
Authority: WO
Inventors: Thomas Weller; Rainer Busch; Juergen Gairing
Original assignee: Robert Bosch Gmbh
Priority date: 2010-08-10
Filing date: 2011-06-21
Publication date: 2012-02-16
Also published as: RU2592340C2; EP2603353A1; CN103180099A; RU2013110234A; DE102010039152A1

Abstract

The invention relates to a device (10) for surface treatment, in particular a grinder, polisher, or the like, comprising an electric motor (14) and a gearbox (15) in a housing (13) for driving a working tool (11), in particular a grinding tool (12), and having a rechargeable power supply (17) for the electric motor (14). Spaced above and to the side of the working tool (11), in particular of the grinding tool (12), a protruding handle (19) engages on the housing (13) for handling, for example for guiding the device. The shape and handle design allow two-hand operation and improved operability of the device (10).

Description

description

title

Device for surface treatment, in particular grinding device, polishing device or the like. State of the art

The invention is based on a device for surface treatment, in particular grinding device, polishing device od. Like., According to the preamble of claim 1. There are known battery-powered grinding devices known, which are compared to larger power supplies usually weaker and lighter. Because of the lower weight, a larger proportion of the contact pressure for the machining of a workpiece must be applied by the user. This is particularly disadvantageous when the user wants to make the benefits of wireless design and lower weight especially useful for editing vertical surfaces or for overhead work.

Disclosure of the invention

The device according to the invention for surface treatment, in particular grinding device, polisher od. Like., With the features of claim 1 has the advantage that this device allows a two-handed operation and improved operability due to the shape and handle design. The protruding handle makes it possible to guide the device with one hand. A located in the vertical direction above the working tool additional handle or a corresponding housing side additional grip surface makes it possible to apply the required for machining contact force directly above the working tool with the second hand. Furthermore, however, a one-hand operation by attacking either on the handle or on the additional housing-side gripping surfaces is possible. The required due to the low weight of the battery-powered device greater proportion of the contact pressure can therefore be good and the user be applied fatigue-free, the handle also helps with the exact guidance of the device. The device is small, compact, lightweight and easy to handle.

The measures listed in the further claims advantageous refinements and improvements of claim 1 device are possible.

An advantageous embodiment of the device according to the invention provides that the upper housing portion, which extends above the working tool, in particular the grinding tool, and laterally adjoins the handle, as an additional handle or additional grip surface for touching and applying a vertical contact force of the working tool, in particular Abrasive tool is formed. It may be advantageous if this additional handle is located in the vertical direction over the working surface of the working tool and not or only to a small extent beyond the space of the device, which is limited by the vertical projection of the working surface of the working tool in the vertical direction. The projecting handle, however, projects beyond this working surface of the working tool completely or at least to a large extent.

The handle may have a spherical shape or is suitably elongated. It is advantageous if the handle is designed as a hand-encompassing encompassing handle and has cross-sectional areas which are preferably round, oval and / or angular or which are combined from such cross-sectional areas. The length of the handle can z. B. be between about 7 cm and 10 cm.

It may also be advantageous if the handle is fixedly and non-releasably attached to the housing or instead is detachable and / or adjustable with respect to the housing and fixable in the respectively set position. This makes the handle easy and practically adaptable to the respective working conditions. The elongated shaped handle may, for. B. with its longitudinal central axis at an angle with respect to the plane of the working tool, in particular grinding tool, be positioned obliquely upwards or downwards and / or to the side or positionable. An orientation transverse to the housing longitudinal direction as fixed or adjustable grip position is possible.

It may also be advantageous if the handle is a handle housing with an inner cavity and a removable wall, for. B. a lid on the end, to close the cavity having. Between the handle housing and the wall as smooth as possible step-free transition is advantageous.

It may also be advantageous to use the cavity in the handle, z. B. in that in the cavity rechargeable batteries or at least a removable battery pack and / or components are arranged, for. In this way, the device in the area above the working surface of the working tool can be made flatter, with the additional housing-side grip surface or the local additional handle above the working tool zoom closer to the working surface. This allows a more stable handling of the device.

The handle housing may be integral with the device housing or it is instead attached to this or placed on this. It can also be advantageous if the housing has a concave recess in the vertical area adjacent to the handle between the handle and the working tool, in particular the grinding tool. This has the advantage that can be reduced while maintaining the desired length of the handle, the handle protrusion on the working surface of the working tool and thus the overall length of the device is smaller. Also, a shift of the center of gravity of the device is achieved away from the handle in the horizontal direction to the working tool. This will any tilting when handling the device z. B. by relatively heavy

Components in the cavity of the handle reduced.

A further advantageous embodiment provides, in a device with a suction hose connectable to the housing, for abrasion material produced during machining

Channel element that moves the junction of the housing for the suction hose at least until the end of the handle, so that the suction hose can be connected only in the region of the end of the handle to the channel element. The channel element expediently extends only slightly above the height of the working tool, in particular grinding tool, and at a relatively large distance below the handle, wherein the distance is so great that the

Surrounding handle can be included smoothly and safely.

It can also be advantageous if the channel element is supported at the end by means of a support element leading to the handle with respect to the handle. A further advantageous embodiment provides that the channel element is combined with the support element and the handle to form a one-piece component. The one-piece component may be integrated in the housing, for. B. be integral with it. Description of the drawings

The invention is explained in more detail in the following description with reference to exemplary embodiments illustrated in the drawings. 1 shows a schematic side view of an apparatus for surface treatment in the form of a grinding apparatus, according to a first exemplary embodiment, FIG.

Fig. 2 is a schematic plan view of the apparatus in Fig. 1, Fig. 3 is a schematic axial longitudinal section of a portion of the apparatus of FIG. 1 and

2,

4 shows a schematic top view of a device for surface treatment according to a second exemplary embodiment,

Fig. 5 is a schematic side view approximately corresponding to that in Fig. 1 of a

Surface treatment apparatus according to a third embodiment,

FIG. 6 is a schematic side view of a surface treatment apparatus according to a fourth embodiment; FIG.

Fig. 7 is a schematic side view of an apparatus for surface treatment according to a fifth embodiment. In Fig. 1 to 3, a first embodiment of a device 10 for surface treatment is shown here z. B. is designed as a grinder, in another embodiment, however, as a polishing device, polishing machine od. Like. Working device can be designed. The device 10 is designed to drive a working tool 11, wherein this working tool 11 in the case shown consists of a grinding tool 12. The device 10 includes a housing 13 an electric motor 14, a downstream of this transmission 15 and an only schematically indicated output 16 for driving the working tool 11, in particular the

Grinding tool 12. The working tool 11 may, as in a multi-sander, have approximately the shape of an iron or, such. As in eccentric grinders known to have a round shape. In Fig. 1 and 2 is an example of the triangular or about ironing design of the

Grinding tool 12 shown.

The device is provided with a battery power supply 17 for the electric motor 14. This battery power supply 17 has, for example, at least one replaceable battery pack 18 or battery cells not shown instead.

Referring particularly to FIGS. 1 and 2, it can be seen that the apparatus 10 is approximately mono-block shaped, with the housing 13 overlying the surface of the grinding tool 12. This surface is the side of the housing 13 not or only slightly surmounted. The housing 13 is located within a construction space, which can be imagined by the projection of the grinding surface in the vertical direction in Fig. 1 upwards.

It can be seen that a protruding handle 19 acts on the housing 13 outside of the stated installation space. The handle 19 is used to handle the device 10, z. B. for device management. The upper area, which extends vertically above the working tool 11 and which adjoins the handle 19 laterally, is designed as an additional handle and / or additional gripping surface 20. This additional handle or this additional grip surface 20 is designed for handling and applying a vertical contact force of the working tool 11 during handling. Thus, the specifications regarding the handling of such a device 10 is taken into account. When grinding, polishing or similar machining operations is a force application in various

Directions necessary. On the one hand, the necessary contact pressure must be applied to the surface of the working tool 11 in a substantially vertical direction. On the other hand, the device 10 must be moved in alternating grinding direction, z. B. in the direction indicated in Fig. 2 Gehäuselängsausrichtung 21 and transversely thereto. The inventive design of the device shape and arrangement of the handle 19 and the additional handle or the additional

Grip surface 20 makes it possible to run the device 10 with one hand and with the second hand for processing, for. B. for grinding, necessary contact force directly above the surface of the working tool 11, in particular of the grinding tool 12, apply. Furthermore, a one-hand operation on each of the two handles 19 and 20 is possible. The additional Grip surface or the additional handle 20 have shown in FIG. 1 a nose-like to the left projecting contour with projection 22. This allows the handling of the device 10 can be improved. Usually, due to the design and the mobility characteristics, devices 10 with battery power supply 17 compared to power supplies usually a lower weight and lower power. Because of the lower weight, a larger proportion of the contact pressure must be applied by the user when processing by means of a device 10. This is facilitated by the additional handle 19 and the additional grip surface or the additional handle 20, wherein the handle 19 not only allows the most accurate guidance of the device 10 but also additionally for transmitting the contact pressure on the surface of the

Working tool 11 can contribute.

In particular, from Fig. 1 and 2 it can be seen that the handle 19 is at a distance above the working surface of the working tool 11 and thereby laterally next to this. The handle 19 is thus completely or at least largely outside the installation space of the device 10, which is limited by the vertical projection of the working surface of the working tool 11. The additional grip surface 20 or the additional handle lies in the vertical direction over the working surface of the

Working tool 11 and does not protrude or only to a small extent beyond said space. The handle 19 has a significantly elongated shape, although in another embodiment, not shown, for. B. also a spherical shape can be used. The handle 19 is formed by the elongated shape and the cross-sectional configuration as a hand-encompassing encompassing handle. It has cross-sectional areas which are preferably round, oval and / or angular. Also, cross-sectional areas of the handle 19 of the aforementioned

Cross-sectional areas combined. The length of the handle 19 may be approximately between 7 cm and 10 cm, but even longer sizes are conceivable. As particularly advantageous z. B. be a length of at least 9.5 cm.

The handle 19 may be fixedly and permanently connected to the housing 13. It can be attached to the housing 13 or placed on it. Instead, the handle 19 with the housing 13 may also be integral. In other configurations, the handle 19 z. B. releasably connected to the housing 13 while z. B. with respect to the housing 13 adjustable and fixable in the respective adjusted position. The elongated handle 19 may be positioned obliquely with its longitudinal central axis 23 at an angle with respect to the plane of the working tool 11 upwards and / or to the side and / or be adjustable to such positions. In the second embodiment shown in Fig. 4, the handle 19 with his

Longitudinal central axis 23 z. B. positioned transversely to the Gehäuselängsausrichtung 21. Such a grip position is also included in the adjustability of the handle 19. With the many

Adjustments could be particularly advantageous in which the handle 19 is pivoted about a vertical axis and locked in the desired position. Instead, or in addition to a pivoting adjustment with subsequent locking about such a transverse axis is possible, as the longitudinal central axis 23 in Fig. 4 horizontally and transversely to

Housing longitudinal alignment 21 runs.

From Fig. 3 it is clear that the handle 19 has a handle housing 24 with an inner cavity 25 and a removable wall 26 for closing the cavity 25. The wall 26 is z. B. from an end lid. In the cavity 25 of the handle housing 24 battery cells or at least one removable battery pack 18 and / or components 27 are arranged, the z. B. from an electronic board 28, a switch not shown od. Like. May exist. By removing the wall 26, in particular the end-side cover, access to the interior of the cavity 25 and components 27 there and / or a battery pack 18 located there battery cells od. Like. Possible. The transition between the removable wall 26 and the handle housing 24 is preferably smooth and as continuous as possible. It may be advantageous if the wall 26, z. B. the end cover, + complete or partial part of the battery pack 18.

In another, not shown embodiment, the handle housing 24 extends to the housing 13 of the device 10 and z. B. releasably received on or in the housing 13. Again, the transition is made as smooth and stepless. Characterized in that 24 corresponding elements are housed inside the handle housing, the device 10 can be made flatter in the area above the surface of the working tool 11. The additional gripping surface 20 and the additional handle, which extend vertically above the surface of the working tool 11, can be brought closer to the surface of the working tool 11 thereby. This allows a more stable operation of the device 10. A device 10 according to the invention with battery power supply 17 for the electric motor 14 has a lower weight compared to power supplies and is suitable with particular advantage for processing on vertical surfaces, eg. B. of walls, windows, doors od. Like., Or for overhead work. The device 10 according to the invention is simple in terms of its operation and handling, safe and allows a low-fatigue use. In the following exemplary embodiments according to FIGS. 5 to 7, the same reference numbers are used for the parts which correspond to the first exemplary embodiments in FIGS. 1 to 3, thereby avoiding repetition of the description of the first embodiment

Embodiment reference is made. In Fig. 5, the additional grip surface and the additional handle 20 is indicated only with dotted lines 20 of the housing 13. The projection 22 shown in Fig. 1 above the working tool 11 as part of the housing 13 is omitted in the case 13 in Fig. 5. Here is shown as a special feature that the housing 13 in the vertical, adjacent to the handle 19 region 30 between handle 19 and Working tool 11 has a concave recess 31. This recess 31 causes the transition region of the elongated handle 19 to the housing 13 is not at the level of the local end of the working surface of the working tool 11 but in Fig. 5 is moved further to the left over this surface of the working tool 11. The working surface of the working tool 11 protrudes in this area 30 thus beyond the attachment of the handle 19 on the housing 13 also. This design has the advantage that the overall length of the device 10 is smaller, the

Center of gravity of the device 10 on the housing longitudinal direction 21 in the direction of the surface of

Work tool 11 is moved. As a result, any tilting tendency is reduced by any heavy components that may be included in the cavity 25 of the handle 19.

The housing 13 and / or the handle housing 24 are preferably made of a technical plastic and injection molded parts. But there are also metallic materials such as aluminum, steel, zinc od. Like. Possible.

In the embodiment shown in Fig. 6, the device 10 is provided with a connectable to the housing 13 suction hose for the resulting during processing of abrasive material. For this design with suction device 10 is provided with a channel member 42 having a connection point 41 for the suction hose 40 and the junction of the housing 13 for the suction hose 40 moves at least to the end of the handle 19. The channel element 42 extends slightly above the height of the working tool 11, without hindering the processing with this, between the underside of the handle 19 and the channel member 42 is a large Interspace is present, which ensures a sufficiently large punch-through height between the handle too comprehensive 19 and the channel element 42. The channel element 42 may be additionally provided as an adapter. It is advantageously made flatter than the

Suction hose 40.

As is apparent from Fig. 7, the channel member 42 is supported at the end by means of a support member 43 which leads to the handle 19 with respect to the handle 19. Advantageously, as shown in FIG. 7, the channel member 42 and the support member 43 may be combined with the handle 19 to form a one-piece component. It may be advantageous in this case that the one-piece component is integrated into the housing 13, for. B. so that is one piece.

Claims

claims

1. Apparatus for surface treatment, in particular grinding device, polishing device od. Like., For driving a working tool (11), in particular a grinding tool (12), in a housing (13) includes an electric motor (14) and a transmission (15) and with a battery

Power supply (17) for the electric motor (14) is provided, characterized in that at a distance above and to the side of the working tool (11), in particular

Grinding tool (12), on the housing (13) has a protruding handle (19) for handling, for. B. for device management, attacks.

2. Apparatus according to claim 1, characterized in that the upper housing portion extending vertically above the working tool (11), in particular of the grinding tool (12), and laterally adjoins the handle (19), as an additional handle (20) or additional Grip surface for touching and applying a vertical contact pressure of the

Working tool (11), in particular grinding tool (12), is formed.

3. Apparatus according to claim 1 or 2, characterized in that the handle (19) has a spherical or elongated shape.

4. Apparatus according to any one of claims 1 to 3, characterized in that the handle (19) is formed as a comprehensive encompassing handle by hand and has cross-sectional areas, which are preferably round, oval and / or square or are combined from such cross-sectional areas.

5. Apparatus according to claim 3 or 4, characterized in that the length of the handle (19) in elongated form is at least approximately between 7 cm and 10 cm.

6. Device according to one of claims 1 to 5, characterized in that the handle (19) on the housing fixed and insoluble or detachable and / or with respect to the housing (13) adjustable and can be fixed in the respective set position.

7. Device according to one of claims 3 to 6, characterized in that the handle (19) in an elongated shape with its longitudinal central axis (23) at an angle with respect to the plane of the working tool (11), in particular grinding tool (12), according to is positioned obliquely above and / or to the side or preferably transversely to the

Housing longitudinal alignment (21) is positioned or adjustable to such positions.

8. Device according to one of claims 1 to 7, characterized in that the handle (19) has a handle housing (24) with an inner cavity (25) and a removable wall (26), for. B. a lid on the end, to close the cavity (25).

9. Apparatus according to claim 8, characterized in that in the cavity (25) of the handle housing (24) battery cells or at least one removable battery pack (18) and / or components (27), such. B. an electronic board (28), a switch od. Like., Are arranged.

10. Apparatus according to claim 8 or 9, characterized in that the handle housing (24) with the housing (13) is integral with or attached to this or placed thereon.

11. Device according to one of claims 1 to 10, characterized in that the housing (13) in the vertical, to the handle (19) adjacent region (30) between the handle (19) and working tool (11), in particular grinding tool (12). , a concave recess (31).

12. Device according to one of claims 1 to 11, with a to the housing (13) connectable suction hose (40) for the resulting during machining abrasion material, characterized by a connection point of the housing (13) for the suction hose (40) at least until Handle end displacing channel element (42) at a distance below the handle (19) and slightly above the height of the working tool (11), in particular

Abrasive tool (12), runs.

13. Apparatus according to claim 12, characterized in that the channel element (42) at the end by means of a handle (19) leading support member (43) with respect to the handle (19). is supported.

Apparatus according to claim 12 or 13, characterized in that the channel element (42) is combined with the support element (43) and the handle (19) to form a one-piece component.

Apparatus according to claim 14, characterized in that the one-piece component is integrated in the housing (13), for. B. so that is one piece.