CA2255183C - Working appliance which can be handled manually - Google Patents
Working appliance which can be handled manually Download PDFInfo
- Publication number
- CA2255183C CA2255183C CA002255183A CA2255183A CA2255183C CA 2255183 C CA2255183 C CA 2255183C CA 002255183 A CA002255183 A CA 002255183A CA 2255183 A CA2255183 A CA 2255183A CA 2255183 C CA2255183 C CA 2255183C
- Authority
- CA
- Canada
- Prior art keywords
- drive unit
- unit
- working
- extension unit
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000004381 surface treatment Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 description 9
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000005498 polishing Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
- B23Q5/046—Offset spindle drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Paper (AREA)
- Vehicle Body Suspensions (AREA)
- Surgical Instruments (AREA)
- Flexible Shafts (AREA)
- Agricultural Machines (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
In the case of a working appliance which can be handled manually, having an elongate drive unit which has in an end region a drive shaft protruding laterally out of the drive unit, particularly good handling properties and a flexible range of applications are achieved by an extension unit being arranged on the drive unit, by the extension unit having at its front end region a device for receiving a working tool, and by the extension unit having a power transmission device for transmitting the rotation of the drive shaft to the device for receiving a working tool.
Description
WORKING APPLIANCE WHICH CAN BE HANDLED MANUALLY
The invention relates to a working appliance which can be handled manually for surface working, having an elongate drive unit which has in an end region a drive shaft protruding laterally out of the drive unit.
Such working appliances in which a polishing or grinding tool for surface working is fitted onto the lateral drive shaft are known. In this case, the axis of the drive shaft, on which a grinding or polishing wheel is arranged, runs at right angles with respect to the elongate drive unit, which at the same time also serves as a handle.
Furthermore, such working appliances in which a grinding belt, aligned parallel to the drive unit, is driven by the drive shaft are known.
The invention is based on the object of developing a working appliance of the type mentioned at the beginning in such a way that the application possibilities for the working appliance are increased and even points where access is geometrically difficult car.
be reached particularly well.
This object is achieved in the case of the working appliance of the generic type mentioned above by an extension unit being arranged on the drive unit, by the extension unit having at its front end region a device for receiving a working tool, and by the extension unit having a power transmission device for transmitting the rotation of the drive shaft to the device for receiving a working tool.
Advantageous developments of the invention are described in the subclaims.
The working appliance which can be handled manually according to the invention serves in particular for surface treatment with grinding and polishing tools.
Furthermore, tools for producing a matt or glazed finish, for deburring, for roughening or for removing paint can also be used. The working tool can, however, also be used with sharp edges or rims, with which cutting and milling operations can be carried out. The term surface working is therefore to be interpreted very broadly. The appliance can be used in particular for surface working, but with special tools can also be used for other purposes. The elongate drive unit has a motor with a gear mechanism in a casing, the motor and gear mechanism being designed in such a way that a drive shaft is led out laterally from the drive unit, in particular at right angles. Fastened on the drive unit in the region of the drive shaft is an extension unit, the extension unit having in its front end, remote from the drive unit, a device for receiving one of the working tools mentioned above, this device being designed for executing a rotational motion and it being possible for one of the disk-shaped working tools, for example, to be attached to it. The power transmission device of the extension unit serves for connecting the drive shaft to the device for receiving the working tool, with the result that the rotary motion of the drive shaft can be converted into a rotary motion of the device for receiving the working tool. This working appliance which can be handled manually can be used particularly flexibly and can even be used at points where access is difficult.
In a preferred development of the invention, the extension unit is arranged detachably on the drive unit.
For this purpose, the extension unit may have a connection portion which can be fixed on an assigned fastening portion of the drive unit.
In this case, the drive portion of the extension unit may be annular and slotted and able to be constricted by a clamping means, such as a clamping ring for example, for fixing on the fastening portion.
Fixing may also be performed with a clamping ring which is placed around correspondingly designed grooves and projections on the drive unit and the extension unit or on the fastening portion and the connection portion and which can be tightened by a clamping screw. For this purpose, either an open ring with a clamping screw can be used or a type of clip, that is to say an annular metal band which has on the surface a kind of toothed rack into which there engages a screw which is fixedly arranged on the clip and by the turning motion of which the diameter of the clip is changed. The clamping ring or the clip has on the rims inwardly inclined projections, which engage in the associated grooves in the drive unit and the extension unit. As a result, the extension unit can be swivelled in an advantageous way with respect to the longitudinal axis of the drive unit, such as for example about the drive shaft or an axis parallel thereto, with the result that it is possible for the working appliance to be adapted to corner regions where access is particularly difficult and at the same time the drive unit can be handled well. In another development of the invention, the extension unit is fastened such that it can swivel on the drive unit in such a way that it can, for example, also swivel with respect to the drive unit about an axis perpendicular to the drive shaft.
The extension unit preferably has a length of approximately 40 cm. To be taken into consideration here is the requirement that the greatest possible length makes it possible for inaccessible points to be reached better, but at the same time restricts the ease with which the appliance can be handled and controlled. An extension unit with a length of approximately 40 cm meets these two mutually conflicting requirements. In this case, the necessary force which has to be applied and the controllability of the appliance also depend on the type of working tool used and the type of application.
Therefore, the extension unit is preferably designed such that it is variable in its length, it being possible for the device for receiving a working tool to be displaced in a positioning slot and fixed at the desired location.
The extension unit is preferably made narrower than the drive unit, since the motor, which needs space, does not have to be accommodated in the extension unit itself.
This design has the effect of further increasing the flexibility of applications for the working appliance according to the invention, even under geometrically difficult conditions.
The extension unit preferably has a toothed disk or a V-belt pulley which is coupled to the drive shaft of the drive unit or is fitted onto the latter and on which there is arranged a toothed belt or a V-belt which runs around a second toothed disk or V-belt pulley which is connected in a rotationally fixed manner to the device for receiving a working tool. Alternatively, a flexible shaft or a gear rack with bevel gears, which engage in corresponding bevel gears on the drive shaft and on the working tool, may also be provided. This device for receiving a working tool is preferably designed as a clamping chuck or drill chuck, which is designed for receiving miniature grinding wheels with a shank which is fixedly mounted thereupon and can be clamped into the drill chuck. These miniature grinding wheels, or more generally the surface working disks, have a diameter of about 6 cm. Instead of the drill chuck, alternatively a collet may be provided.
In another development of the invention, the working appliance is equipped with an additional handle, which is preferably arranged perpendicular to the elongate drive unit and parallel to the drive shaft. The handle is in this case preferably fastened directly on the drive unit and is consequently arranged in the same plane as the drive unit and the drive shaft. The handle is preferably arranged offset with respect to this plane by means of an angle piece. However, the handle may also be mounted on the extension unit, with the result that the handle is fastened together with the extension unit on the drive unit. The handle is consequently attached largely in a central position of the working appliance and allows advantageous handling of the latter from ergonomic aspects.
In a particularly preferred embodiment, the angle piece has two fastening devices, in particular bores with an internal thread, into which the handle can be screwed.
In this case, the one thread is located on the 90° angle of the angle piece and the other thread is located on the free end of the angle piece. As a result, the handle can, according to requirements, be attached either in a position parallel to the drive shaft or in a position perpendicular to the drive shaft. In both positions, the handle is aligned perpendicular to the drive unit.
The drive shaft of the drive unit is expediently arrestable, with the result that a tool change in the rotationally fixedly held drill chuck is made easier.
For the arresting there may be provided an arresting device, which is actuated for example by a push button or sliding button on the drive unit and arrests the drive shaft by positive or frictional engagement with the latter.
For operating the working appliance independently of the power supply system, it is advantageous if the drive unit includes an electric drive motor with a storage battery for its power supply.
The invention is further explained below on the basis of an exemplary embodiment represented in the drawing depicting schematic representations, in which specifically:
Figure 1 shows a partially sectional plan view of a working appliance according to the invention;
Figure 2 shows a side view of a working appliance according to the invention;
Figure 3 shows a clamping ring for connecting the drive unit and the extension unit;
Figure 4 shows a clip for connecting the drive unit and the extension unit; and Figure 5 shows an exchangeable handle on the working appliance according to the invention.
Represented in Figure 1 is a working appliance 1, which has essentially a drive unit 2 and an extension unit 8. The drive unit 2 has an elongate, ergonomically shaped casing 7, which also serves for handling. In the casing 7 there is arranged a motor 3 with a preceding gear mechanism 4, said gear mechanism 4 driving a drive shaft 5, which protrudes laterally from the casing 7. In this region, the casing 7 includes a fastening portion 32, on which the extension unit 8 is detachably fastened by its connection portion 33. The drive shaft 5 engages by its protruding region into a central clearance of a toothed disk 10 rotatably mounted in the extension unit 8, a rotationally fixed coupling being formed. The casing 7 has in the region of the drive shaft 5 and of the fastening portion 32 an opening through which the drive shaft 5 protrudes and which is surrounded by an outwardly directed peripheral groove 6. The connection portion 33 of the extension unit 8 has an opening of the _ g _ same size, with a likewise outwardly directed peripheral groove 9, with the result that, in the joined-together state, the drive unit 2 and the extension unit 8 lie with the groove 6 of the drive unit 2 and the groove 9 of the extension unit 8 exactly against each other. In this region, either a clamping ring 18 according to Figure 3 or a clip according to Figure 4 is attached in order to connect the drive unit 2 and the extension unit 8 fixedly to each other. Rotatably mounted in the extension unit 8 is the first toothed disk 10 or V-belt pulley, which is coupled in a rotationally fixed manner to the drive shaft of the drive unit 2 and is driven by the latter.
Rotatably mounted in the extension unit 8, at the front end 3 0 f acing away from the drive uni t 2 , is a second toothed disk 11 or V-belt pulley, which is connected to the first toothed disk or V-belt pulley 10 by means of a toothed belt or V-belt 12. In this case, the second toothed disk 11 has a smaller diameter than the first toothed disk 10, with the result that the second toothed disk 11 rotates at a stepped-up, higher speed in relation to the first toothed disk 10. The V-belt pulley 11 is connected to a bearing shaft 31, which has a central clamping chuck or drill chuck 13, which opens toward the side of the extension unit 8 facing away from the drive unit 2 and into which different working tools can be clamped. According to Figure 1, a shank 16 of a grinding wheel 15 has been clamped into the drill chuck 13. The grinding wheel 15 may have abrasive paper or flaps on its front side and thus be used as a surface working tool.
i c, Similarly, disks with sharp-edged r~.ms may be used, with the result that the working tool care be used for cutting off and milling. A casing 1~ of the extension unit 8 and the casing 7 of the drive unit 2 overlap in a certain region which is larger than the openings connected to each other by the clamping ring 18, with the result that the clamping ring is sornewhat covered by the casings and thus the clamping screw does not. project with sharp edges. The extension zznit 8 can be (fixed at different swivel positions in relation to the drive unit 2, by for example loosening the clamping ring 18 or the clip and then swivelling the extension unit 8 in relation to the drive unit 2 until it. i:~ in the desix°ed position and then tightening the clampinc~ ring 18 or the clip again until a rotationally fixed, recur°e connection is established between the drive unit 2 and the extension unit 8. In the overlapping region of the extension unit 8 and the drive unit 2 there is fastened on tine drive unit 2 a handle 17 (see Figure 5), which mar be aligned, for example, parallel oz- perpendicular to the drive shaft 5 and to the axis of rotation of t:he working tool 15.
Represented in Figure 2 is a side view of the working appliance 1 in the direction of the drive shaft 5. Attached in the front region: of the drive unit 2 is the extension unit 8, which has t:he first, large toothed disk 10, which is coupled to the drive shaft 5 of the drive unit 2 and drives the front, small toothed disk 11 by means of the toothed belt. 1~. The kaearing shaft 31 of the front, small toothed disk 11 contains the clamping chuck or drill chuck 13, which serves for receiving grinding wheels with a shank. The casing 14 of the extension unit 8 is adapted in its geometry to the size of the toothed disks 10 and 11, producing dimensions of the casing 14 which taper so as to be narrow toward the front end 30. In the front end region 30, the casing 14 is rounded off and adapted in shape and size to the front toothed disk 11, with the result that the casing 14, which is otherwise also very flatly shaped in the direc-tion of the drive shaft 5, is as small and rounded-off as possible and, as a result, even points where access is difficult can be reached particularly well. The distance between the axes of rotation of the two toothed disks or V-belt pulleys 10 and 11 is about 40 cm. The casing 14 may be formed by two shell halves, it being possible for the connection portion 33 to be formed onto the one shell half .
Represented in Figure 3 is a clamping ring 18, by which the drive unit 2 and the extension unit 8 are connected. The clamping ring 18 has a U-shaped profile, which means that its two outer edges, protruding inwardly into the clamping ring, engage behind the grooves 6 and 9 of the drive unit 2 and of the extension unit 8, respectively. The diameter of the clamping ring 18 is changed by means of a clamping screw 19. In the closed state, that is to say with the clamping screw 19 com-pletely tightened, the diameter of the clamping ring 18 is just large enough for it to bear firmly against the grooves 6 and 9 and connect the drive unit 2 and the extension unit 8 fixedly to each other.
Represented in Figure 4 is a clip 20, which can be used as an alternative to the clamping ring 18 and has at its inner end a clamping device :?1 which comprises an upwardly arched insertion opening, i.nt:o which the other end of the band is inserted, and has a clamping screw 22, which lies in the longitudinal direction with respect to the band and engages in corresponding teeth 26, which are arranged in the adjusting region on the clip 20. ,lust like the clamping ring 18, the clip 20 has a U-shaped cross section, the lateral segments which engage behind the grooves 6 and 9 being absent in the adjusting region of the adjusting device 21..
y Represented in Figure S is a front view of the working appliance, clearly illustrating the arrangement of the handle 17. Attached to the drive unit 2 in the overlapping region with respect to the extension unit 8 is an angle piece 23, which extends initially upwardly, perpendicular to the drive shaft. C>, and then at right angles thereto, parallel to the drive shaft 5. The angle piece 23 has two threads 24 and 25, the position of which is likewise~perpendicular to each other, with the result that a handle :17 can be screwed according to choice into these threads 24 and 2s and Thus, according to requirements, a handle 17 a~.igned paral3el or perpendicular to the drive shaft 5 and the working tool 15 is available.
The invention relates to a working appliance which can be handled manually for surface working, having an elongate drive unit which has in an end region a drive shaft protruding laterally out of the drive unit.
Such working appliances in which a polishing or grinding tool for surface working is fitted onto the lateral drive shaft are known. In this case, the axis of the drive shaft, on which a grinding or polishing wheel is arranged, runs at right angles with respect to the elongate drive unit, which at the same time also serves as a handle.
Furthermore, such working appliances in which a grinding belt, aligned parallel to the drive unit, is driven by the drive shaft are known.
The invention is based on the object of developing a working appliance of the type mentioned at the beginning in such a way that the application possibilities for the working appliance are increased and even points where access is geometrically difficult car.
be reached particularly well.
This object is achieved in the case of the working appliance of the generic type mentioned above by an extension unit being arranged on the drive unit, by the extension unit having at its front end region a device for receiving a working tool, and by the extension unit having a power transmission device for transmitting the rotation of the drive shaft to the device for receiving a working tool.
Advantageous developments of the invention are described in the subclaims.
The working appliance which can be handled manually according to the invention serves in particular for surface treatment with grinding and polishing tools.
Furthermore, tools for producing a matt or glazed finish, for deburring, for roughening or for removing paint can also be used. The working tool can, however, also be used with sharp edges or rims, with which cutting and milling operations can be carried out. The term surface working is therefore to be interpreted very broadly. The appliance can be used in particular for surface working, but with special tools can also be used for other purposes. The elongate drive unit has a motor with a gear mechanism in a casing, the motor and gear mechanism being designed in such a way that a drive shaft is led out laterally from the drive unit, in particular at right angles. Fastened on the drive unit in the region of the drive shaft is an extension unit, the extension unit having in its front end, remote from the drive unit, a device for receiving one of the working tools mentioned above, this device being designed for executing a rotational motion and it being possible for one of the disk-shaped working tools, for example, to be attached to it. The power transmission device of the extension unit serves for connecting the drive shaft to the device for receiving the working tool, with the result that the rotary motion of the drive shaft can be converted into a rotary motion of the device for receiving the working tool. This working appliance which can be handled manually can be used particularly flexibly and can even be used at points where access is difficult.
In a preferred development of the invention, the extension unit is arranged detachably on the drive unit.
For this purpose, the extension unit may have a connection portion which can be fixed on an assigned fastening portion of the drive unit.
In this case, the drive portion of the extension unit may be annular and slotted and able to be constricted by a clamping means, such as a clamping ring for example, for fixing on the fastening portion.
Fixing may also be performed with a clamping ring which is placed around correspondingly designed grooves and projections on the drive unit and the extension unit or on the fastening portion and the connection portion and which can be tightened by a clamping screw. For this purpose, either an open ring with a clamping screw can be used or a type of clip, that is to say an annular metal band which has on the surface a kind of toothed rack into which there engages a screw which is fixedly arranged on the clip and by the turning motion of which the diameter of the clip is changed. The clamping ring or the clip has on the rims inwardly inclined projections, which engage in the associated grooves in the drive unit and the extension unit. As a result, the extension unit can be swivelled in an advantageous way with respect to the longitudinal axis of the drive unit, such as for example about the drive shaft or an axis parallel thereto, with the result that it is possible for the working appliance to be adapted to corner regions where access is particularly difficult and at the same time the drive unit can be handled well. In another development of the invention, the extension unit is fastened such that it can swivel on the drive unit in such a way that it can, for example, also swivel with respect to the drive unit about an axis perpendicular to the drive shaft.
The extension unit preferably has a length of approximately 40 cm. To be taken into consideration here is the requirement that the greatest possible length makes it possible for inaccessible points to be reached better, but at the same time restricts the ease with which the appliance can be handled and controlled. An extension unit with a length of approximately 40 cm meets these two mutually conflicting requirements. In this case, the necessary force which has to be applied and the controllability of the appliance also depend on the type of working tool used and the type of application.
Therefore, the extension unit is preferably designed such that it is variable in its length, it being possible for the device for receiving a working tool to be displaced in a positioning slot and fixed at the desired location.
The extension unit is preferably made narrower than the drive unit, since the motor, which needs space, does not have to be accommodated in the extension unit itself.
This design has the effect of further increasing the flexibility of applications for the working appliance according to the invention, even under geometrically difficult conditions.
The extension unit preferably has a toothed disk or a V-belt pulley which is coupled to the drive shaft of the drive unit or is fitted onto the latter and on which there is arranged a toothed belt or a V-belt which runs around a second toothed disk or V-belt pulley which is connected in a rotationally fixed manner to the device for receiving a working tool. Alternatively, a flexible shaft or a gear rack with bevel gears, which engage in corresponding bevel gears on the drive shaft and on the working tool, may also be provided. This device for receiving a working tool is preferably designed as a clamping chuck or drill chuck, which is designed for receiving miniature grinding wheels with a shank which is fixedly mounted thereupon and can be clamped into the drill chuck. These miniature grinding wheels, or more generally the surface working disks, have a diameter of about 6 cm. Instead of the drill chuck, alternatively a collet may be provided.
In another development of the invention, the working appliance is equipped with an additional handle, which is preferably arranged perpendicular to the elongate drive unit and parallel to the drive shaft. The handle is in this case preferably fastened directly on the drive unit and is consequently arranged in the same plane as the drive unit and the drive shaft. The handle is preferably arranged offset with respect to this plane by means of an angle piece. However, the handle may also be mounted on the extension unit, with the result that the handle is fastened together with the extension unit on the drive unit. The handle is consequently attached largely in a central position of the working appliance and allows advantageous handling of the latter from ergonomic aspects.
In a particularly preferred embodiment, the angle piece has two fastening devices, in particular bores with an internal thread, into which the handle can be screwed.
In this case, the one thread is located on the 90° angle of the angle piece and the other thread is located on the free end of the angle piece. As a result, the handle can, according to requirements, be attached either in a position parallel to the drive shaft or in a position perpendicular to the drive shaft. In both positions, the handle is aligned perpendicular to the drive unit.
The drive shaft of the drive unit is expediently arrestable, with the result that a tool change in the rotationally fixedly held drill chuck is made easier.
For the arresting there may be provided an arresting device, which is actuated for example by a push button or sliding button on the drive unit and arrests the drive shaft by positive or frictional engagement with the latter.
For operating the working appliance independently of the power supply system, it is advantageous if the drive unit includes an electric drive motor with a storage battery for its power supply.
The invention is further explained below on the basis of an exemplary embodiment represented in the drawing depicting schematic representations, in which specifically:
Figure 1 shows a partially sectional plan view of a working appliance according to the invention;
Figure 2 shows a side view of a working appliance according to the invention;
Figure 3 shows a clamping ring for connecting the drive unit and the extension unit;
Figure 4 shows a clip for connecting the drive unit and the extension unit; and Figure 5 shows an exchangeable handle on the working appliance according to the invention.
Represented in Figure 1 is a working appliance 1, which has essentially a drive unit 2 and an extension unit 8. The drive unit 2 has an elongate, ergonomically shaped casing 7, which also serves for handling. In the casing 7 there is arranged a motor 3 with a preceding gear mechanism 4, said gear mechanism 4 driving a drive shaft 5, which protrudes laterally from the casing 7. In this region, the casing 7 includes a fastening portion 32, on which the extension unit 8 is detachably fastened by its connection portion 33. The drive shaft 5 engages by its protruding region into a central clearance of a toothed disk 10 rotatably mounted in the extension unit 8, a rotationally fixed coupling being formed. The casing 7 has in the region of the drive shaft 5 and of the fastening portion 32 an opening through which the drive shaft 5 protrudes and which is surrounded by an outwardly directed peripheral groove 6. The connection portion 33 of the extension unit 8 has an opening of the _ g _ same size, with a likewise outwardly directed peripheral groove 9, with the result that, in the joined-together state, the drive unit 2 and the extension unit 8 lie with the groove 6 of the drive unit 2 and the groove 9 of the extension unit 8 exactly against each other. In this region, either a clamping ring 18 according to Figure 3 or a clip according to Figure 4 is attached in order to connect the drive unit 2 and the extension unit 8 fixedly to each other. Rotatably mounted in the extension unit 8 is the first toothed disk 10 or V-belt pulley, which is coupled in a rotationally fixed manner to the drive shaft of the drive unit 2 and is driven by the latter.
Rotatably mounted in the extension unit 8, at the front end 3 0 f acing away from the drive uni t 2 , is a second toothed disk 11 or V-belt pulley, which is connected to the first toothed disk or V-belt pulley 10 by means of a toothed belt or V-belt 12. In this case, the second toothed disk 11 has a smaller diameter than the first toothed disk 10, with the result that the second toothed disk 11 rotates at a stepped-up, higher speed in relation to the first toothed disk 10. The V-belt pulley 11 is connected to a bearing shaft 31, which has a central clamping chuck or drill chuck 13, which opens toward the side of the extension unit 8 facing away from the drive unit 2 and into which different working tools can be clamped. According to Figure 1, a shank 16 of a grinding wheel 15 has been clamped into the drill chuck 13. The grinding wheel 15 may have abrasive paper or flaps on its front side and thus be used as a surface working tool.
i c, Similarly, disks with sharp-edged r~.ms may be used, with the result that the working tool care be used for cutting off and milling. A casing 1~ of the extension unit 8 and the casing 7 of the drive unit 2 overlap in a certain region which is larger than the openings connected to each other by the clamping ring 18, with the result that the clamping ring is sornewhat covered by the casings and thus the clamping screw does not. project with sharp edges. The extension zznit 8 can be (fixed at different swivel positions in relation to the drive unit 2, by for example loosening the clamping ring 18 or the clip and then swivelling the extension unit 8 in relation to the drive unit 2 until it. i:~ in the desix°ed position and then tightening the clampinc~ ring 18 or the clip again until a rotationally fixed, recur°e connection is established between the drive unit 2 and the extension unit 8. In the overlapping region of the extension unit 8 and the drive unit 2 there is fastened on tine drive unit 2 a handle 17 (see Figure 5), which mar be aligned, for example, parallel oz- perpendicular to the drive shaft 5 and to the axis of rotation of t:he working tool 15.
Represented in Figure 2 is a side view of the working appliance 1 in the direction of the drive shaft 5. Attached in the front region: of the drive unit 2 is the extension unit 8, which has t:he first, large toothed disk 10, which is coupled to the drive shaft 5 of the drive unit 2 and drives the front, small toothed disk 11 by means of the toothed belt. 1~. The kaearing shaft 31 of the front, small toothed disk 11 contains the clamping chuck or drill chuck 13, which serves for receiving grinding wheels with a shank. The casing 14 of the extension unit 8 is adapted in its geometry to the size of the toothed disks 10 and 11, producing dimensions of the casing 14 which taper so as to be narrow toward the front end 30. In the front end region 30, the casing 14 is rounded off and adapted in shape and size to the front toothed disk 11, with the result that the casing 14, which is otherwise also very flatly shaped in the direc-tion of the drive shaft 5, is as small and rounded-off as possible and, as a result, even points where access is difficult can be reached particularly well. The distance between the axes of rotation of the two toothed disks or V-belt pulleys 10 and 11 is about 40 cm. The casing 14 may be formed by two shell halves, it being possible for the connection portion 33 to be formed onto the one shell half .
Represented in Figure 3 is a clamping ring 18, by which the drive unit 2 and the extension unit 8 are connected. The clamping ring 18 has a U-shaped profile, which means that its two outer edges, protruding inwardly into the clamping ring, engage behind the grooves 6 and 9 of the drive unit 2 and of the extension unit 8, respectively. The diameter of the clamping ring 18 is changed by means of a clamping screw 19. In the closed state, that is to say with the clamping screw 19 com-pletely tightened, the diameter of the clamping ring 18 is just large enough for it to bear firmly against the grooves 6 and 9 and connect the drive unit 2 and the extension unit 8 fixedly to each other.
Represented in Figure 4 is a clip 20, which can be used as an alternative to the clamping ring 18 and has at its inner end a clamping device :?1 which comprises an upwardly arched insertion opening, i.nt:o which the other end of the band is inserted, and has a clamping screw 22, which lies in the longitudinal direction with respect to the band and engages in corresponding teeth 26, which are arranged in the adjusting region on the clip 20. ,lust like the clamping ring 18, the clip 20 has a U-shaped cross section, the lateral segments which engage behind the grooves 6 and 9 being absent in the adjusting region of the adjusting device 21..
y Represented in Figure S is a front view of the working appliance, clearly illustrating the arrangement of the handle 17. Attached to the drive unit 2 in the overlapping region with respect to the extension unit 8 is an angle piece 23, which extends initially upwardly, perpendicular to the drive shaft. C>, and then at right angles thereto, parallel to the drive shaft 5. The angle piece 23 has two threads 24 and 25, the position of which is likewise~perpendicular to each other, with the result that a handle :17 can be screwed according to choice into these threads 24 and 2s and Thus, according to requirements, a handle 17 a~.igned paral3el or perpendicular to the drive shaft 5 and the working tool 15 is available.
Claims (11)
1. A manual working appliance for surface treatment, comprising:
an elongate drive unit which has, in an end region, a drive shaft protruding laterally out of the drive unit;
a handle; and an extension unit arranged on the drive unit, the extension unit having at a front end region a device for receiving a working tool and a power transmission device for transmitting the rotation of the drive shaft to the device for receiving the working tool, wherein:
the extension unit is fastened on the drive unit in such a way that it is swiveled, the handle is fixable in different positions on the drive unit or the extension unit, the device for receiving a working tool includes a drill chuck, and the power transmission device transmits the rotation of the drive shaft to the drill chuck such that a rotation speed of the drill chuck is higher than a rotation speed of the drive shaft.
an elongate drive unit which has, in an end region, a drive shaft protruding laterally out of the drive unit;
a handle; and an extension unit arranged on the drive unit, the extension unit having at a front end region a device for receiving a working tool and a power transmission device for transmitting the rotation of the drive shaft to the device for receiving the working tool, wherein:
the extension unit is fastened on the drive unit in such a way that it is swiveled, the handle is fixable in different positions on the drive unit or the extension unit, the device for receiving a working tool includes a drill chuck, and the power transmission device transmits the rotation of the drive shaft to the drill chuck such that a rotation speed of the drill chuck is higher than a rotation speed of the drive shaft.
2. A working appliance as claimed in claim 1, wherein the extension unit is fastened detachably on the drive unit.
3. A working appliance as claimed in claim 1 or 2, wherein the extension unit is fastened on the drive unit by a clamping ring.
4. A working appliance as claimed in claim 1 or 2, wherein the extension unit is fastened on the drive unit by a clip.
5. A working appliance as claimed in any one of claims 1 to 4, wherein the extension unit is variable in its length.
6. A working appliance as claimed in any one of claims 1 to 5, wherein the width of the extension unit is made narrower than the width of the drive unit.
7. A working appliance as claimed in any one of claims 1 to 6, wherein the extension unit has two V-belt pulleys.
8. A working appliance as claimed in any one of claims 1 to 6, wherein the extension unit has a toothed belt for transmitting the rotation of the drive unit to the device for receiving a working tool.
9. A working appliance as claimed in any one of claims 1 to 5, wherein the handle is arranged perpendicular to the drive unit.
10. A working appliance as claimed in any one of claims 1 to 9, wherein the handle is fastened to an angle piece.
11. A working appliance as claimed in claim 10, wherein the angle piece has two threads, into which the handle is screwed according to choice.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19754429.0 | 1997-12-08 | ||
| DE19754429A DE19754429C2 (en) | 1997-12-08 | 1997-12-08 | Manually manageable processing device with an extension unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2255183A1 CA2255183A1 (en) | 1999-06-08 |
| CA2255183C true CA2255183C (en) | 2004-09-21 |
Family
ID=7851141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002255183A Expired - Fee Related CA2255183C (en) | 1997-12-08 | 1998-12-02 | Working appliance which can be handled manually |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0920950B1 (en) |
| JP (1) | JPH11254319A (en) |
| AT (1) | ATE245080T1 (en) |
| AU (1) | AU9516898A (en) |
| CA (1) | CA2255183C (en) |
| DE (2) | DE19754429C2 (en) |
| ES (1) | ES2205368T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210237306A1 (en) * | 2019-05-15 | 2021-08-05 | Milwaukee Electric Tool Corporation | Offset base for router |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005053534A1 (en) * | 2005-11-08 | 2007-05-10 | Robert Bosch Gmbh | Hand Tool accessory |
| CN113001398B (en) * | 2020-04-29 | 2022-02-11 | 合肥工业大学 | Variable-rigidity flexible grinding and polishing actuator |
| CN112405256B (en) * | 2020-10-20 | 2022-03-18 | 中车青岛四方机车车辆股份有限公司 | Grinding equipment with angle adjusting function |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2350098A (en) * | 1941-12-31 | 1944-05-30 | Black & Decker Mfg Co | Oscillating sander |
| US2777340A (en) * | 1955-09-28 | 1957-01-15 | Leonard J Hettwer | Offset drilling attachment |
| US3162091A (en) * | 1963-06-03 | 1964-12-22 | K F Products Inc | Attachment for milling machines |
| DE1987699U (en) * | 1968-03-21 | 1968-06-12 | Lister Landgeraete G M B H | ELECTRICALLY POWERED COMBINATION TOOL. |
| FR2289305A1 (en) * | 1974-10-29 | 1976-05-28 | Metabowerke Kg | PORTABLE TOOL FOR DRILLING HOLES FOR ASSEMBLY ANCHORS |
| DE2816398A1 (en) * | 1978-04-15 | 1979-10-25 | Licentia Gmbh | Grinding machine grinding wheel tensioning system - has flat on drive spindle and clamping collars and spindle locating pin |
| US4266376A (en) * | 1979-02-09 | 1981-05-12 | Black & Decker Inc. | Portable electrically energized surface finishing tool |
| DE3229183A1 (en) * | 1982-08-05 | 1984-02-09 | Robert Bosch Gmbh, 7000 Stuttgart | HAND TOOLS WITH AUXILIARY HANDLE |
| DE3439475C2 (en) * | 1984-10-27 | 1996-02-01 | Bosch Gmbh Robert | Angle attachment for striking and rotating machine tools |
| DE3841644C2 (en) * | 1988-12-10 | 1997-12-11 | Stihl Maschf Andreas | Hand tool, in particular grinding or cut-off machine, with a tensioning device for the belt drive |
| IT217254Z2 (en) * | 1989-05-04 | 1991-11-21 | Se Ver Srl | APPARATUS FOR GRINDING AND PAINTING THE CLOSED BLINDS OF SHUTTERS AND FOR SIMILAR USE |
| DE4342986C2 (en) * | 1993-12-16 | 1998-08-13 | Metabowerke Kg | Motorized hand tool with belt drive |
| DE4445597A1 (en) * | 1994-12-20 | 1996-06-27 | Atlas Copco Elektrowerkzeuge | Hand held power tool e.g. hammer drill |
| JPH091478A (en) * | 1995-06-16 | 1997-01-07 | L G Maruzen Kk | Grip angle regulating device |
-
1997
- 1997-12-08 DE DE19754429A patent/DE19754429C2/en not_active Expired - Fee Related
-
1998
- 1998-11-30 ES ES98122708T patent/ES2205368T3/en not_active Expired - Lifetime
- 1998-11-30 EP EP98122708A patent/EP0920950B1/en not_active Expired - Lifetime
- 1998-11-30 AT AT98122708T patent/ATE245080T1/en not_active IP Right Cessation
- 1998-11-30 DE DE59809016T patent/DE59809016D1/en not_active Expired - Fee Related
- 1998-12-02 CA CA002255183A patent/CA2255183C/en not_active Expired - Fee Related
- 1998-12-02 AU AU95168/98A patent/AU9516898A/en not_active Abandoned
- 1998-12-07 JP JP10347600A patent/JPH11254319A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210237306A1 (en) * | 2019-05-15 | 2021-08-05 | Milwaukee Electric Tool Corporation | Offset base for router |
| US12285881B2 (en) * | 2019-05-15 | 2025-04-29 | Milwaukee Electric Tool Corporation | Offset base for router |
Also Published As
| Publication number | Publication date |
|---|---|
| AU9516898A (en) | 1999-06-24 |
| ES2205368T3 (en) | 2004-05-01 |
| DE59809016D1 (en) | 2003-08-21 |
| JPH11254319A (en) | 1999-09-21 |
| ATE245080T1 (en) | 2003-08-15 |
| EP0920950A1 (en) | 1999-06-09 |
| CA2255183A1 (en) | 1999-06-08 |
| EP0920950B1 (en) | 2003-07-16 |
| DE19754429C2 (en) | 2002-11-21 |
| DE19754429A1 (en) | 1999-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |