TOOL WITH TOOL ELEMENTS

Abstract

A tool with tool elements, rotating grinding and/or sanding tool is provided. The tool consists of a tool portion and a mounting portion, which secures the tool elements in the tool. The tool is distinguished in that the tool portion comprises first mount, and the mounting portion includes second corresponding mount for engaging with the first mount. The first and second mount include one or more resilient tabs, each of which is provided with at least one barb, and furthermore the mount comprises one or more recesses. When the tool portion and the mounting portion are assembled, the barbs on the resilient tabs will lock in the recesses of the mounting portion which are designed for this, locking the tool portion and the mounting portion to each other.

Claims

1. A tool with tool elements, grinding and/or sanding elements, which tool is designed for mounting on a machining unit with a motor, which rotates the tool via a drive shaft, which tool comprises a mounting portion and a tool portion, where the tool portion comprises grooves to receive the tool elements, where the mounting portion comprises fastener for fastening the tool, directly or indirectly, to the drive shaft, wherein the tool elements are secured in the tool portion, after the tool is assembled by connecting the mounting portion and the tool portion, wherein the tool portion comprises a first mount, the mounting portion comprises second corresponding mount for engaging with the first mount, and the first and second mount comprise one or more resilient tabs, each of which is provided with at least one barb, and the first and second mount furthermore comprise one or more recesses for receiving said barbs with a snap action in the assembled state of the tool for locking of the tool portion and the mounting portion to each other with the tool elements secured in the grooves.

2. The tool according to claim 1, wherein the tool portion has a first inner wall, which is directed toward the mounting portion, the mounting portion has a second inner wall, which is directed toward the tool portion, and the radial outer surface of the second inner wall is dimensioned such as to be enclosed by the first inner wall when the tool is in the assembled state, and in connection with the first inner cylindrical wall or in openings in the first wall there are arranged resilient tabs with barbs, and along the radial outer side of the second inner wall in the mounting portion there are arranged a number of recesses in the mounting portion, corresponding in position, shape, and number to the tool portion's resilient tabs.

3. The tool according to claim 1, wherein along the periphery of the tool portion there are arranged a number of pins, and along the periphery of the mounting portion there is devised a slot, in which the tool portion's pins are designed to engage in order to secure the periphery of the tool portion to the mounting portion.

4. The tool according to claim 3, wherein the slot is arranged in the periphery of the mounting portion or on a radially inner surface of an outer wall, which outer wall is directed substantially toward the tool portion along the periphery of the mounting portion.

5. The tool according to claim 4, wherein the slots for the tool elements are formed as slits which are open or closed at the periphery of the tool portion.

6. The tool according to claim 1, wherein at least one guide groove is placed in the first inner wall of the tool portion, and on the mounting portion there is placed at least one guide pin in connection with the second inner wall of the mounting portion, so that the guide pin is designed to engage with the guide groove when assembling the tool portion and the mounting portion.

7. The tool according to claim 1, wherein the tool portion is formed as a disk, a cylinder, a conical shape, or with a curved shape, such as a concave or convex shape.

8. The tool according to claim 1, wherein in that the outer periphery of the tool has one of the following shapes: round, oval or polygonal, wherein the polygonal is selected from triangular, rectangular, pentagonal, hexagonal, heptagonal, and octagonal.

9. The tool according to claim 1, wherein the tool elements are mounted in base pieces, which base pieces are oversized at their bottom in relation to the grooves, so that the base pieces are secured in the slots when the mounting portion and the tool portion are assembled.

10. The tool according to claim 1, wherein the tool elements comprise grinding elements for grinding, sanding, polishing or similar work, where the grinding elements may be slotted, while the tool elements also comprise support brushes, which support the grinding elements, wherein the grinding elements and/or the support brushes are fastened in base pieces which are mounted in the grooves in the tool portion.

11. The tool according to claim 1, wherein the tool rotates about a central axis, for which the edge portion of a number of tool elements is mounted at an angle to the outer surface of the tool portion and/or at an angle to the center axis.

Description

BRIEF DESCRIPTION

[0096] Some of the embodiments will be described in detail, with references to the following Figures, wherein like designations denote like members, wherein:

[0097] FIG. 1 shows a tool in perspective;

[0098] FIG. 2 shows a possible tool element for use in the tool;

[0099] FIG. 3 shows a tool in perspective from opposite angle;

[0100] FIG. 4 shows the outer surface of the tool portion;

[0101] FIG. 5 shows the inner surface of the tool portion;

[0102] FIG. 6 shows the first inner wall of the tool portion with resilient tabs with barbs and guide grooves; and

[0103] FIG. 7 shows the mounting portion with guide grooves and recesses for locking the tool portion's resilient tabs.

DETAILED DESCRIPTION

[0104] The embodiment is described with regard to a circular embodiment of the tool, but the tool may also have different configuration, as described above.

[0105] FIG. 1 shows a tool 1 for machining of wood, metal or composite materials, for example. The tool 1 consists of a tool portion 2 and a mounting portion 3, which are joined together so that they secure a number of tool elements 4. Furthermore, the mounting portion 3 is configured to be fastened directly to a drive shaft 5 on a motor unit (not shown in FIG. 1).

[0106] FIG. 3 shows a tool 1 from a different angle. Here, one sees the mounting portion 3, which is joined by a bayonet coupling 6 to the drive shaft 5.

[0107] FIG. 4 shows the outer side of the tool portion, on which there are grooves 7 for tool elements 4.

[0108] FIG. 5 shows the inner side of the tool portion. On the tool portion's inner bottom 8 is placed a first inner wall 9. In FIG. 5, the first inner wall 9 is circular. The first inner wall 9 may have other shapes, as described above. In the first inner wall 9 there are formed a series of openings, there being 6 openings in the figures. In four of the openings there are arranged a resilient tab 10. The last two openings are guide grooves 11. As mentioned above, it is possible to have more or fewer guide grooves, and it is likewise possible to employ fewer or more resilient tabs.

[0109] FIG. 5 furthermore shows a series of slats 12, which lie parallel with the grooves 7 for the tool elements. In this way, a slit is formed for fastening the tool elements 4.

[0110] Along the tool portion's periphery 13 there is arranged a series of pins 14. In FIG. 5 one pin 14 is placed between each groove 7 for fastening of the tool portion's periphery 13 to the mounting portion 3. It is possible to have more or fewer pins.

[0111] FIG. 6 shows an enlargement of the inside of the tool portion. One sees here the resilient tabs 10 secured to the bottom of the tool portion 8. As emerges from the drawing, the surface of the resilient tab 10 is shifted slightly radially inward from the first inner wall 9, yet always such that it remains in connection with the openings. At the top of the resilient tab there is arranged a barb or hook 15, which forms the male part in a snap lock when assembling the mounting portion 3 and tool portion 2. The first inner wall 9 is cylindrical, but it can have other forms, as described above.

[0112] FIG. 7 shows the interior of the mounting portion 3. On the mounting portion's bottom 16 there is a second inner wall 17. The second inner wall 17 is cylindrical, but may also have other forms, as described above. Along the inner wall 17 there is a series of recesses 18, adapted in position to the tool portion's 2 resilient tabs 10 (see FIG. 6), and such that the recesses 18 constitute the female part in the snap lock when assembling the tool portion and the mounting portion.

[0113] In connection with the mounting portion's 3 second inner cylindrical wall 17 there is placed guide pins 19. The guide pins are secured to the bottom 16 of the mounting portion 3 and to the mounting portion's second inner wall 17. The guide pins 19 extend radially outward from the mounting portion's inner wall 17. The guide pins 19 are placed so that they engage with the guide grooves 11 on the tool portion 2 when the mounting portion 3 and tool portion 2 are correctly assembled. If one tries to assemble the mounting portion 3 and tool portion 2 in an incorrect manner, the guide pins will abut against the tool portion's first inner wall 9 and prevent the mounting portion 3 and the tool portion 2 from being assembled.

[0114] Along the periphery of the mounting portion 3 is placed an outer wall 20, which is directed toward the tool portion. Along the upper edge of the outer wall 20 is placed a slot 21 on the radially inner side of the outer wall 20. The slot 21 is placed such that the pins 14 of the tool portion (see FIG. 6) fit into the slot, whereupon the periphery of the tool portion 2 is locked firmly to the periphery of the mounting portion 3.

[0115] The grooves 7 on the tool portion 2 for fastening of the tool elements 4 are configured as slits from the periphery of the tool portion. In this way, it is possible to change the tool elements in place from the periphery of the tool portion.

[0116] Alternatively, the grooves 7 are closed at the periphery and the tool elements 4 are mounted in the tool portion 2 by leading them out through the grooves 7 from the rear of the tool portion.

[0117] On the inner side of the second inner wall 17 of the mounting portion there is devised for example a bayonet socket 6 for fastening of the tool 1 to the drive shaft 5. It is also possible to mount the tool 1 on the drive shaft of the machining unit by other means, as described above.

[0118] FIG. 2 shows an example of a tool element 4 which consists of a base piece 23, in which is placed a brush 24 and a grinding or polishing element 25.

[0119] Although the present invention has been disclosed in the form of preferred embodiments and variations thereon, it will be understood that numerous additional modifications and variations could be made thereto without departing from the scope of the invention.

[0120] For the sake of clarity, it is to be understood that the use of a or an throughout this application does not exclude a plurality, and comprising does not exclude other steps or elements. The mention of a unit or a module does not preclude the use of more than one unit or module.

FIGURE REFERENCES

[0121] 1. Tool [0122] 2. Tool portion [0123] 3. Mounting portion [0124] 4. Tool element [0125] 5. Drive shaft [0126] 6. Bayonet socket [0127] 7. Groove [0128] 8. Bottom of tool portion [0129] 9. First inner wall [0130] 10. Resilient tab [0131] 11. Guide groove [0132] 12. Slats [0133] 13. Tool portion's periphery [0134] 14. Pin on periphery [0135] 15. Barbs [0136] 16. Mounting portion's bottom [0137] 17. Second inner wall [0138] 18. Recesses [0139] 19. Guide pin [0140] 20. Mounting portion's outer wall [0141] 21. Slot in periphery [0142] 22. Bayonet coupling [0143] 23. Base piece for brushes and/or grinding element [0144] 24. Brushes [0145] 25. Grinding element