Component for establishing a form-locking riveted connection of a tool

Abstract

An electric power tool is disclosed. In an embodiment, the electric power tool includes a tool, a tool holder part and a main body with a plurality of rivets integrated with the main body. The rivets include rivet shafts of a cross section for producing a positive-locking rivet joint of the tool with the tool holder part, wherein the tool and the tool holder part have circular openings which are aligned with each other, and wherein the rivet shafts are positioned aligned with the openings on the main body and protrude through the aligned openings.

Claims

1. An electric power tool comprising: a tool; a tool holder part; and a main body comprising a plurality of rivets integrated with the main body, the rivets having a plurality of rivet shafts of circular cross section for producing a positive-locking rivet joint of the tool with the tool holder part, wherein the tool and the tool holder part have circular openings which are aligned with each other, and wherein the rivet shafts are aligned with the openings on the main body and protrude through the aligned openings.

2. The electric power tool according to claim 1, wherein the main body is formed as a common large-scale factory head from which the rivet shafts protrudes.

3. The electric power tool according claim 1, wherein the main body is annular.

4. The electric power tool according to claim 1, wherein the main body is rectangular or rod-shaped.

5. The electric power tool according to claim 4, wherein the rivets are arranged in a zigzagged manner on the main body.

6. The electric power tool according to claim 1, wherein the tool holder part is configured to interact with a tool holder of an electric oscillating power tool.

7. The electric power tool according to claim 1, wherein the tool holder part is cup-shaped.

8. The electric power tool according to claim 1, wherein the tool comprises a saw blade, a grinding plate or a rasp.

9. A method for producing a positive-locking rivet joint of a tool with the tool holder part using the main body for the electric power tool according to claim 1, the method comprising: plugging together the main body, the tool and the tool holder part such that the rivets protrude through openings of the tool and the tool holder part, the openings being aligned in a plugging direction; inserting the assembled main body, tool and tool holder part in a mounting of a riveting device; and performing a riveting process for producing the positive-locking rivet joint.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Below, several embodiments are described with reference to the drawings. Shown are:

(2) FIG. 1 is an exploded view of a tool holder part, a tool and a component of the invention for producing a positive-locking rivet joint;

(3) FIG. 2 is an isometric view of the tool with a riveted tool holder part; and

(4) FIG. 3 is a plan view of another component for producing a positive-locking rivet joint.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

(5) In the figures, identical or functionally equivalent components are provided with identical reference numerals.

(6) FIG. 1 shows a tool holder part 10, which is configured to cooperate with a tool holder of an electric oscillating power tool (not shown), as well as a tool 20, which can be embodied as a saw blade, a grinding disk, a rasp or the like, for example. According to a possible embodiment, the tool is a disk-shaped saw blade segment, as shown in FIG. 1. The tool holder part 10 may, as shown in FIGS. 1 and 2, be formed with a cup and thus offset to allow or facilitate working in hard to reach places.

(7) The tool holder part 10 and the tool 20 are known elements from the prior art. The tool 20 must be non-detachably connected to the tool holder part 10 so that it can be mounted in the electric oscillating power tool and driven thereby. The tool 20 and the tool holder part 10 may for certain applications be made of materials that are not weldable, such as, for example, spring steel, high speed steel or stainless steel.

(8) For example, the electric oscillating power tool may be a conventional multi-tool for sawing, cutting and grinding, that cooperates with an extensive range of tools, shown here in the form of tool 20. The tool holder part 10 is preferably configured such that it allows for a relatively quick and easy exchange of the tool.

(9) In FIG. 1 is further shown an inventive component 30 for producing a positive-locking rivet joint. The component 30 preferably has a main body 31, which combines a plurality of rivets 32 to a rivet group. The main body 31 may be embodied as a large-scale factory head, from which the rivet shafts 32 are protruding. The rivet shafts 32 preferably correspond to the rivet shafts of solid rivets, as these can absorb very high loads compared to other types of rivets. Alternatively, shafts of other types of rivets, for example, tubular rivets, may be integrated into the main body 31. The area and shape of the main body 31 as well as the number and arrangement of the rivet shafts 32 can be adjusted according to the particular application. Thus, the component 30 is flexibly usable.

(10) In an exemplary embodiment, the main body 31 may have an annular shape as shown in FIGS. 1 and 2. Accordingly, the rivet shafts 32 may be arranged in a ring on the main body 31, so that a rivet ring is formed. Such a rivet ring may be used in the preparation of a positive-locking rivet joint of a disk-shaped tool 20, for example, a disk-shaped saw blade with a tool holder part 10.

(11) According to another possible embodiment, the individual rivets can be combined to form a rod-shaped component 30. In this case the main body 31 is preferably rectangular or rod-shaped. Such a component 30 may be used in a straight tool 20, such as a straight saw blade. On the rectangular or bar-shaped component 30, the rivet shafts 32 may be arranged in a zigzagged manner, similar to known welding points on spot-welded saw blades known from the prior art. If necessary, a linear array of rivet shafts 32 on the rod-shaped component 30 is also possible.

(12) Preferably, the component 30 can be entirely made of a rivet material, for example, steel, stainless steel, copper, brass, aluminum alloys, plastic or titanium, for example, by extrusion or similar mass production processes. This results in a cost-effective way of manufacturing the component 30.

(13) As shown in FIG. 2, the component 30 can be used to produce a positive-locking rivet joint. Shown is a tool 20 with a riveted tool holder part 10. The component 30 itself is hidden in this representation by the tool 20. According to a possible embodiment, the tool 20 is a disk-shaped tool, illustrated here as a saw blade segment of a power tool. Accordingly, an annular component 30 having an annular main body 31 and annularly arranged rivet shafts 32 can be used for producing the positive-locking and thus non-detachable joint in this example. The parts to be joined, in the example shown the tool 20 and the tool holder part 10, have aligned openings 22 and 12, respectively. The rivet shafts 32 are positioned on the main body 31 with the openings 22 and 12 aligned (see FIG. 1).

(14) In order to rivet the tool holder part 10 with the tool 20, the component 30, the tool 20 and the tool holder part 10 are inserted into each other, so that the rivet shafts 32 project through the openings 22 and 12. The inserted parts are placed in a riveting device. The subsequent riveting process is done as with individual rivets, wherein the rivets or rivet shafts 32 are deformed by pressure in the width so that on each rivet shaft 32 a shop head is formed, whereby the tool holder part 10 can be connected to the tool 20 in a positive-locking manner.

(15) The mounting of the riveting apparatus is preferably configured such that only the tool holder part 10 and the component 30 are held, and the outer geometry of the tool 20 has no influence on the riveting apparatus. Thus, tools 20 of various sizes and shapes can be processed on a riveting apparatus without converting the riveting apparatus.

(16) While the component 30 has been described for the production of a positive-locking riveted joint using the example of an electric power tool, the possible applications of the component 30 are not limited to this application, however.

(17) FIG. 3 finally shows a further component 30 according to the invention that differs from the previously shown component 30 in particular by twelve recesses 34 arranged rotationally symmetrically on an inner wall 33 of the main body. Using the recesses 34, the component can be positioned in the correct position for connection to the tool 20 and the tool holder part 10, i.e. in particular achieve a predefined angular position between said parts.

(18) Notwithstanding that in the preceding description several possible embodiments of the invention have been disclosed, it is understood, that numerous other variants of embodiments exist by possible combinations of all the technical features mentioned and also of all the technical features and embodiments obvious to the skilled person. It is further understood that the embodiments are to be understood merely as examples that do not limit the scope, applicability, and the configuration in any way. Rather, the preceding description would indicate to the skilled person an appropriate way in order to realize at least one exemplary embodiment. It is understood, that in an exemplary embodiment various changes in function and arrangement of elements may be made without departing from the scope and its equivalents disclosed in the claims.

LIST OF REFERENCE NUMERALS

(19) 10 tool holder part 12 opening 20 tool 22 opening 30, 30 component for producing a positive-locking rivet joint 31 main body 32 rivets/rivet shafts 33 wall 34 recess