DUST COLLECTOR FOR AN ANGLE GRINDER

Abstract

A dust collector for an angle grinder, comprising a collector body for covering a circular grinding wheel, and a sealing element extending along an outer periphery (U) of the collector body for at least partially sealing the collector body against a surface to be machined by means of the grinding wheel, and comprising a suction connection, by way of which material removed from the surface can be suction out of the collector body. In an axial direction with respect to the axis of rotation (R) of the grinding wheel, the sealing element is spring-mounted in the collector body by means of at least one spring element.

Claims

1. A dust collector for an angle grinder, comprising a collector body (10) for covering a circular grinding wheel, and a sealing element extending along an outer periphery of the collector body for at least partially sealing the collector body against a surface to be machined by the circular grinding wheel, and comprising a suction connection, by way of which material removed from the surface can be suctioned out of the collector body, wherein, in an axial direction with respect to an axis of rotation (R) of the grinding wheel, the sealing element is spring-mounted in the collector body by at least one spring element.

2. The dust collector for an angle grinder as claimed in claim 1, wherein the collector body is designed to cover a predominant part of the grinding wheel and the dust collector has a collector segment displaceable along the collector body in a peripheral direction (U) of the collector body, the collector segment arranged for gradually covering and exposing of a part of the grinding wheel as needed, and wherein in the axial direction with respect to the axis of rotation (R) of the grinding wheel, the sealing element is also spring-mounted in the collector segment by the at least one spring element.

3. The dust collector for an angle grinder as claimed in claim 1, wherein the spring element has a base web, via which the at least one spring element is fastened on the collector body.

4. The dust collector for an angle grinder as claimed in claim 3, wherein the at least one spring element has at least one spring rocker arm protruding from the base web.

5. The dust collector for an angle grinder as claimed in claim 3, wherein the at least one spring element has at least one holding bracket, designed to prevent the sealing element from falling axially out of the collector body.

6. The dust collector for an angle grinder as claimed in claim 5, wherein the holding bracket protrudes in the axial direction from the base web and an axial stop for a holding rail of the sealing element is formed at an other end of the base web, wherein the holding bracket can be deflected in a radial direction, in relation to the axis of rotation (R) of the grinding wheel, for replacing the sealing element.

7. The dust collector for an angle grinder as claimed in claim 6, wherein the axial stop is formed by a stop web, which extends parallel to the base web.

8. The dust collector for an angle grinder as claimed in claim 5, wherein the holding bracket is designed as a clamping sleeve, which is arranged on a side of a respective spring rocker arm facing away from the base web and is designed for clamping a holding rail of the sealing element.

9. The dust collector for an angle grinder as claimed in claim 1, wherein the at least one spring element is formed in one piece.

10. The dust collector for an angle grinder as claimed in claim 1, wherein the sealing element comprises brushes and the spring element has a spring stiffness in an axial direction which is less than a stiffness of the brushes.

11. The dust collector for an angle grinder as claimed in claim 1, wherein a plurality of spring elements are provided along the outer periphery of the collector body.

12. The dust collector for an angle grinder as claimed in claim 1, wherein the angle grinder has a frame, and the collector body has a central opening, through which a drive spindle, on which the circular grinding wheel is to be attached, can protrude, wherein a groove is formed at the central opening, and therefore the collector body can be fastened interlocked and thus fixed on the frame.

13. An angle grinder comprising a dust collector for an angle grinder as claimed in claim 1, wherein the angle grinder has a frame, and collector body is arranged or can be arranged fixed on the frame.

14. The dust collector of claim 3, wherein the base web is flat.

15. The dust collector of claim 2, wherein the spring element has a base web via which the at least one spring element is fastened on the collector body and/or the collector segment.

16. The dust collector of claim 15, wherein the at least one spring element is fastened on the collector body and/or the collector segment by a pin, a screw, or a rivet.

17. The dust collector of claim 7, wherein the stop web has a recess such that a contact surface between the stop web and the sealing element is reduced.

18. The dust collector of claim 9, wherein the at least one spring element is spring steel.

19. The dust collector of claim 4, wherein the at least one spring rocker arm protrudes from the base web in an orientation corresponding to the outer periphery of the collector body.

20. The dust collector of claim 15, wherein the at least one spring element has at least one holding bracket designed to prevent the sealing element from falling axially out of the collector body and/or the collector segment.

Description

[0027] In the figures, identical and equivalent components are identified by identical reference signs. In the figures:

[0028] FIG. 1 shows a schematic bottom view of a dust collector for an angle grinder according to the invention comprising a spring element according to a first alternative;

[0029] FIG. 2 shows a sectional illustration of the exemplary embodiment from FIG. 1;

[0030] FIG. 3 shows a spring element according to a second alternative;

[0031] FIG. 4 shows the spring element from FIG. 3 in a side view.

EXEMPLARY EMBODIMENTS:

[0032] A dust collector 100 for an angle grinder according to the invention is shown in a bottom view in FIG. 1. The dust collector 100 for the angle grinder has a collector body 10 for covering a circular grinding wheel (not shown here). An axis of rotation R of the grinding wheel is indicated by a dot-dash line. The dust collector 100 for the angle grinder also has a collector segment 20, which is displaceable along the collector body 10 along a peripheral direction U of the collector body 10.

[0033] The collector body 10 is designed to cover a predominant part of the grinding wheel, wherein the displaceable collector segment 20 is provided for covering and exposing a remaining part of the grinding wheel.

[0034] Both the collector body 10 and also the displaceable collector segment 20 have a sealing element 30 in the form of a brush curtain. Since the dust collector 100 for the angle grinder of FIG. 1 has both a collector body 10 and also a collector segment 20, the brush curtain 20 is formed in two pieces or two brush curtains are provided. The brush curtains 30 are used to seal the collector body 10 and the collector segment 20 against a surface to be machined, which is not shown here. Material removed from the surface in the course of the machining can be suctioned out via a suction connection 40 provided on the collector body 10.

[0035] According to the invention, in an axial direction with respect to the axis of rotation R of the grinding wheel, the brush curtain 30 is spring-mounted in the collector body 10 and the collector segment by means of at least one spring element 50. The spring element 50 is shown isolated on the left side of FIG. 1.

[0036] The spring element 50 has a flatly formed base web 51, via which the spring element 50 is fastened on the collector body or collector segment 20. In the exemplary embodiment shown in FIG. 1, the spring element 50 is fastened (for example, hot caulked) via a pin 52 (cf. FIG. 2), wherein the pin engages in a hole 52.

[0037] The spring element 50 has two spring rocker arms 53 protruding from the base web 51 in opposing orientations. The spring rocker arms 53 exert a spring action on a holding rail 31 of the brush curtain 30. The spring rocker arms 53 are oriented in the direction of the outer periphery U of the collector body 10 when the spring element 50 is installed.

[0038] The spring element 50 has a holding bracket 55, which is designed to prevent the brush curtain 30 from falling axially out of the collector body 10 or the collector segment 20, respectively. In the exemplary embodiment shown in FIG. 1, the holding bracket 55 protrudes in the axial direction from the base web 51 and has a stop for the holding rail 31 of the brush curtain at its other end. The axial stop is formed in the present case as a stop web 57, which extends parallel to the base web 51 and has a recess 59.

[0039] The holding bracket 55 can be deflected in the radial direction, indicated by the double arrow, for the purpose of replacing the brush curtain. The brush curtain 30 can thus advantageously be replaced without a tool being required.

[0040] As is apparent from FIG. 1, a functional integration is implemented by the spring element 50, namely, on the one hand, the spring action in the axial direction according to the invention, on the other hand, the brush curtain is prevented from falling out of the collector body 10 or the collector segment 20, respectively.

[0041] As can be inferred from FIG. 1, the collector body 10 has a central opening 11, through which a drive spindle (not shown here), on which the circular grinding wheel is to be attached, can protrude through the central opening 11. A groove 12 is formed at the central opening, and therefore the collector body 10 can be fastened interlocked and thus fixed on the frame on an angle grinder.

[0042] FIG. 2 shows a sectional illustration of the exemplary embodiment of the dust collector 100 for an angle grinder from FIG. 1.

[0043] It can be seen well that the spring elements 50 arranged inside a volume of the collector body 10 at the outer edge of the collector body 10 exert a spring action on the holding rail 31 of the brush curtain 30 by way of the respective spring rocker arms 53 thereof. At the same time, the respective stop webs 57 form an axial stop for the holding rail 31, and therefore it is held securely inside the collector body 10.

[0044] FIG. 3 shows a spring element 50 according to a second alternative. The holding bracket 55 is designed as a clamping sleeve, which is arranged on a side of a respective spring rocker arm 53 facing away from the base web 51. The holding bracket 55 designed as a clamping sleeve is used to clamp the holding rail 31 of the brush curtain 30 (cf. FIG. 4).

[0045] The spring element 50 shown in FIG. 3 is particularly suitable for comparatively narrow holding rails, with respect to the radial direction. Possible manufacturing tolerances of the holding rail can be compensated for well because the holding brackets 55 are designed as clamping sleeves.

[0046] Finally, FIG. 4 shows the spring element of FIG. 3 in a side view, wherein a brush curtain 30 with holding rail 31, which is in the process (indicated by the arrow) of being clamped in the holding bracket 55 designed as a clamping sleeve, is illustrated above the holding bracket 55 designed as a clamping sleeve.

[0047] Two holes 52, 52 are provided on the base web 51 of the spring element 50 of FIG. 3, in order to fasten the element 50 in the same manner as in FIGS. 1 and 2 by means of two pins 52 on the collector body 10 or on the collector segment 20.