DUST COLLECTOR FOR ANGLE GRINDER

Abstract

A dust collector for an angle grinder comprises a collector body for covering a circular grinding disk, a sealing element for sealing at least some sections of the collector body from a surface to be machined by the grinding disk, at least some sections of the sealing element being placeable in a first and a second retaining rail, and a suction terminal via which the abraded surface particles can be sucked off the collector body. The first retaining rail extends along a closed periphery of the collector body, and in the collector body, the sealing element is spring-mounted by at least one spring element in the axial direction relative to the axis of rotation of the grinding disk.

Claims

1. A dust collector for angle grinders, comprising a collector body for covering a circular grinding disk; a sealing element having sections; a first retaining rail and a second retaining rail, wherein at least some sections of the sealing element are placeable in the first retaining rail and the second retaining rail, and the first rail and the second rail are for sealing the at least some sections of the collector body from a surface to be machined by the grinding disk; having a suction terminal via which abraded surface particles can be sucked out of the collector body; and at least one open spring element wherein the first retaining rail runs along a closed circumference (U) of the collector body, and the sealing element is spring-loaded in the collector body in an axial direction relative to an axis of rotation (R) of the grinding disk, by the at least one spring element.

2. The dust collector for angle grinders according to claim 1, wherein the dust collector comprises a collector segment which can be displaced along the collector body in a circumferential direction (N) of the collector body, provided for gradually covering and uncovering a remaining portion of the grinding disk as required, wherein the closed circumference (U) of the collector body extends along a circular arc (A) of the collector body and a chord (D) of the collector segment.

3. The dust collector for angle grinders according to claim 2, wherein a sealing element is spring-loaded in the axial direction, based on the axis of rotation (R) of the grinding disk, in the collector segment by the at least one spring element.

4. The dust collector for angle grinders according to claim 1, wherein the spring element has a base web via which the at least one spring element is attached to the collector body.

5. The dust collector for angle grinders according to claim 4, wherein the at least one spring element has at least one wing protruding from the base web.

6. The dust collector for angle grinders according to claim 3, wherein the collector body has at least one retaining clip which is designed to prevent the sealing element from falling out axially from the collector body and/or the collector segment.

7. The dust collector for angle grinders according to claim 6, wherein the retaining bracket is positioned with a first end (55a) on an underside of the collector body, with an axial stop for the first retaining rail of the sealing element (30) formed on a second end (55b), wherein the retaining bracket can be deflected in the radial direction, relative to the axis of rotation (R) of the grinding disk, for replacing the sealing element.

8. The dust collector for angle grinders according to claim 7, wherein the axial stop is formed as a stop bar which runs parallel to the base web.

9. The dust collector for angle grinders according to claim 1, wherein the at least one spring element is formed as a single piece.

10. The dust collector for angle grinders according to claim 1, wherein the at least one spring element has a spring stiffness in the axial direction which is less than a stiffness of the sealing element.

11. The dust collector for angle grinders according to claim 1, wherein a plurality of spring elements is provided along the closed circumference (U) of the collector body.

12. The dust collector for angle grinders according to claim 1, wherein the collector body has a central opening, wherein a drive spindle to which the circular grinding disk will be attached can project through the central opening wherein a groove is formed on the central opening such that the collector body can be attached to an angle grinder with a positive fit, and therefore fixed to the frame thereof.

13. An angle grinder, having a dust collector, the dust collector comprising a collector body for covering a circular grinding disk; a sealing element having sections; a first retaining rail and a second retaining rail, wherein at least some sections of the sealing element are placeable in the first retaining rail and the second retaining rail, and the first rail and the second rail are for sealing the at least some sections of the collector body from a surface to be machined by the grinding disk; having a suction terminal via which abraded surface particles can be sucked out of the collector body; and at least one open spring element wherein the first retaining rail runs along a closed circumference (U) of the collector body, and the sealing element is spring-loaded in the collector body in an axial=direction relative to an axis of rotation (R) of the grinding disk, by the at least one spring element, wherein the angle grinder has a frame and the collector body is fixed to the frame or can be arranged thereon.

14. The dust collector of claim 4, wherein the base web is flat.

15. The dust collector for angle grinders according to claim 2, wherein the spring element has a base web via which the at least one spring element is attached to the collector body and/or the collector segment.

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

17. The dust collector of claim 5, wherein the at least one wing protrudes from the base web in an orientation corresponding to the outer circumference (U) of the collector body.

18. The dust collector of claim 8, wherein the axial stop has a recess such that a contact surface between the stop bar and the first retaining rail is reduced.

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

20. The dust collector for angle grinders according to claim 2, wherein a plurality of spring elements is provided along the closed circumference (U) of the collector body and/or the collector segment.

Description

[0033] In the figures, the same and similar components are numbered with the same reference numerals, wherein:

[0034] FIG. 1 shows a plan view of a dust collector for angle grinders, according to the invention;

[0035] FIG. 2 shows a first schematic bottom view of the dust collector for angle grinders, according to the invention, having a spring element according to a first alternative;

[0036] FIG. 3 shows a second schematic bottom view of the dust collector for angle grinders, according to the invention, having the spring element according to the first alternative;

[0037] FIG. 4 shows a third schematic bottom view of the dust collector for angle grinders, according to the invention, having the spring element according to the first alternative;

[0038] FIG. 5 shows a sectional view taken along section line A-A in FIG. 1;

[0039] FIG. 6 shows a perspective view of a spring element according to a first alternative; and

[0040] FIG. 7 shows a perspective view of a spring element according to a second alternative.

EMBODIMENTS

[0041] A dust collector 100 for angle grinders is shown in FIG. 1 in a plan view.

[0042] The dust collector for angle grinders 100 has a collector body 10 for covering a circular grinding disk, which is not shown in the figures. An axis of rotation R of the grinding wheel is indicated by a dot-dash line. The dust collector 100 for angle grinders 100 also has a collector segment 20 which can be displaced along the collector body 10 along a circumferential direction N of the collector body 10.

[0043] The collector body 10 is designed to cover a major portion of the grinding disk, wherein the displaceable collector segment 20 is provided for covering and uncovering a remaining portion of the grinding disk.

[0044] As shown in FIGS. 2, 3, 4, and 5, both the collector body 10 and the displaceable collector segment 20 have a sealing element 30 in the form of a brush curtain. As described in detail below, the sealing element 30 is positioned in a first retaining rail 31 and in a second retaining rail 31.

[0045] Because the dust collector 100 for angle grinders in FIG. 1 has both a collector body 10 and a collector segment 20, the brush curtain 30 is formed in two parts, and/or two brush curtains are included. The sealing element 30 for the collector body 10, designed as a brush curtain, is clamped and/or positioned in the first support rail 31. Furthermore, the sealing element 30 for the collector segment 20, designed as a brush curtain, is clamped or positioned in the second support rail 31.

[0046] The brush curtains 30 serve to seal the collector body 10 and the collector segment 20 to a surface of a material being machined, which is not shown here. Abraded surface particles can be sucked away in the course of the operation (for example, grinding work) via a suction terminal 40 provided on the collector body 10.

[0047] The brush curtain 30 is spring-loaded with respect to the collector body 10 and the collector segment 20 in the axial direction, relative to the axis of rotation R of the grinding disk, by a spring element 50. The spring element 50 is shown separately in a first embodiment in FIG. 6, and in a second embodiment in FIG. 7.

[0048] The spring element 50 comprises, in the first and second embodiments, a flat base web 51 via which the spring element 50 is attached to the collector body or collector segment 20.

[0049] In the first embodiment shown in FIG. 1, the spring element 50 is attached via a pin (see FIG. 2) (for example, hot-spliced), wherein the pin engages in a hole 52.

[0050] The second embodiment of the spring element 50 shown in FIG. 7 substantially corresponds to the first embodiment. In contrast to the first embodiment, the base web 51 has no hole.

[0051] Both in the first and in the second embodiment, the spring element 50 has two wings 53 projecting from the base web 51 in opposite directions. The wings 53 each exert a spring action on a retaining rail 31 of the brush curtain 30. The wings 53 are oriented, when the spring element 50 is installed, in the direction of the outer circumferential direction N of the collector body 10.

[0052] The first retaining rail 31 for the sealing element 30 runs along a closed circumference U around the collector body 10. The circumference U extends along a circular arc A of the collector body 10 and a chord D of the collector segment 20. In this way, the first support rail 31 substantially forms a closed circle with a straight sidenamely the chord D of the collector segment 20. As shown in FIGS. 2 and 4, the sealing element 30 for the collector body 10 is arranged only in the support rail 31 along the circular arc A of the collector body 10. The section of the retaining rail 31 along the chord D of the collector segment 20 has no sealing element 30.

[0053] The retaining rail 31 for receiving the sealing element 30 for the collector segment 20 extends along the circular arc B of the collector segment 20 and the chord D of the collector segment 20. The sealing element 30 is located only in the section of the support rail 31 along the circular arc B of the collector segment 20.

[0054] When the dust collector 100 for angle grinders as illustrated in FIG. 4 is closed (that is, the collector segment 20 is closed), the sealing element 30 for the collector segment 20 closes the section of the retaining rail 31 along the chord D of the collector segment 20 which does not have a sealing element 30.

[0055] The collector body 10 and the collector segment 20 have retaining clips 55 which are designed to prevent the brush curtain 30 from falling out of the collector body 10 or the collector segment 20 axially. In the embodiment shown in FIG. 1, the retaining bracket 55 protrudes in the axial direction from the underside of the collector body 10, and has a stop for the support rail 31, 31 of the brush curtain 30 on its free end. The axial stop is designed in the present case as a stop bar 57 which extends substantially parallel to the collector body 10.

[0056] The retaining bracket 55 can be deflected in the radial direction with respect to the axis of rotation R, as indicated by the double arrow M, for the purpose of replacing the brush curtain. Thus, the sealing element 30 advantageously designed as a brush curtain can be replaced without the need for a special tool.

[0057] The spring element 50 realizes a functional integrationspecifically, on the one hand, the spring action in the axial direction, and on the other hand, preventing the brush curtain 30 from falling out of the collector body 10 and/or the collector segment 20 axially.

[0058] As can be seen in FIG. 1, the collector body 10 has a central opening 11, wherein a drive spindle, not shown here, to which the circular grinding disk will be attached, can project through the central opening 11. A groove 12 is constructed on the central opening 11, such that the collector body 10 can be attached to an angle grinder (not shown) with a positive fit, and therefore fixed to the frame thereof

[0059] The spring elements 50 arranged within a volume of the collector body 10 on the outer edge of the collector body 10 exert a spring action via their respective wings 53 on the support rail 31 of the brush curtain 30.