Propeller arrangement

Abstract

The invention relates to a propeller arrangement (1) having a propeller part (2) and a shaft part (3), in particular for an underwater vacuum cleaner, wherein the propeller part (2) and the shaft part (3) are coaxially connected to one another via a latching connection (4), which latching connection (4) has at least two latching fingers (5) which can move elastically in a latching direction (R) radially with respect to an axis of rotation (1a) of the propeller arrangement (1), and a latching opening (6) for accommodating the latching fingers (5). The latching fingers (5) are formed integrally with the shaft part (3). The latching fingers (5) and the latching opening (6) form—in and/or against a direction of rotation (P) of the propeller arrangement (1) —a positive connection. This enables an easily detachable rotary connection between the propeller part (2) and the shaft part (3) in a simple manner.

Claims

1. A propeller arrangement, comprising the following: a propeller part and a shaft part, in particular for an underwater vacuum cleaner, wherein the propeller part and the shaft part are configured to be coaxially connected to one another via a latching connection, wherein the latching connection has at least two latching fingers, which can be moved elastically in a latching direction (R) radially with respect to an axis of rotation of the propeller arrangement, and a latching opening for accommodating the latching fingers, wherein the latching fingers are formed integrally with the shaft part, and the latching fingers and the latching opening form a positive connection, wherein the positive connection is defined by the cross-section of the latching opening and the profile of the latching fingers.

2. The propeller arrangement according to claim 1, wherein the latching opening has a rectangular cross-section.

3. The propeller arrangement according to claim 1, wherein the latching opening includes a first flank and a second flank and the latching fingers rest directly against the first flank or the second flank of the latching opening.

4. The propeller arrangement according to claim 3, wherein at least one flank of the latching opening has at least one depression or at least one guide strip.

5. The propeller arrangement according to claim 4, wherein the latching opening has a width (b) which is measured perpendicularly to the latching direction (R) between two parallel first flanks of the latching opening and corresponds to at least one finger width (f) of the latching fingers.

6. The propeller arrangement according to claim 1, wherein the latching opening has a width (w) which is measured in the direction of the latching direction (R) between two parallel second flanks and corresponds to at least a minimum outer distance (a) of the latching fingers from each other.

7. The propeller arrangement according to claim 1, wherein the shaft part is designed as a shaft cap.

8. The propeller arrangement according to claim 1, wherein the propeller part or the shaft part consists of a thermoplastic terpolymer, preferably an acrylonitrile-butadiene-styrene copolymer.

9. The propeller arrangement according to claim 1, wherein the latching fingers and the latching opening form the positive connection, in and against a direction of rotation (P) of the propeller arrangement.

10. The propeller arrangement according to claim 1, wherein the latching fingers and the latching opening form the positive connection, in or against a direction of rotation (P) of the propeller arrangement.

11. The propeller arrangement according to claim 1, wherein the latching opening includes a first flank and a second flank and the latching fingers rest directly against the first flank and the second flank of the latching opening.

12. The propeller arrangement according to claim 3, wherein at least one of the flanks of the latching opening has at least one depression and at least one guide strip.

13. The propeller arrangement according to claim 1, wherein the propeller part and the shaft part consist of a thermoplastic terpolymer, preferably an acrylonitrile-butadiene-styrene copolymer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a propeller arrangement according to the invention in an axonometric presentation;

(2) FIG. 2 shows the propeller arrangement in a plan view;

(3) FIG. 3 shows the propeller arrangement in a bottom view;

(4) FIG. 4 shows the propeller arrangement in a side view;

(5) FIG. 5 shows the propeller arrangement in a further side view;

(6) FIG. 6 shows a propeller part of the propeller arrangement in an axonometric representation;

(7) FIG. 7 shows the propeller part in a plan view;

(8) FIG. 8 shows the propeller part in a bottom view;

(9) FIG. 9 shows the propeller part in a side view;

(10) FIG. 10 the propeller part in a further side view;

(11) FIG. 11 shows a shaft part of the propeller arrangement in an axonometric view;

(12) FIG. 12 shows a plan view of the shaft part;

(13) FIG. 13 shows the shaft part in a side view; and

(14) FIG. 14 shows the shaft part in a further side view.

DETAILED DESCRIPTION

(15) FIG. 1 to FIG. 5 show a propeller arrangement 1 having a propeller part 2 and a shaft part 3, for example for an underwater vacuum cleaner of a swimming pool. FIG. 6 to FIG. 10 show a propeller part 2 and FIG. 11 to FIG. 14 show a shaft part 3 of this propeller arrangement 1.

(16) The propeller part 2 and the shaft part 3 are coaxially connected to each other via a latching connection 4. The shaft part 3 is designed, for example, as a shaft cap which can be connected or is connected in a rotationally fixed manner to a rotary shaft 10 of a drive motor not shown further, indicated by dashed lines in FIG. 4 and FIG. 5. The shaft cap can be permanently connected to the rotary shaft 10, for example, in particular pressed and/or glued or screwed. The propeller part 2 and/or the shaft part 3 may be made of a thermoplastic terpolymer, for example acrylonitrile-butadiene-styrene copolymer,

(17) The latching connection 4 has at least two latching fingers 5 that are elastically movable in a latching direction R radial to the axis of rotation 1a of the propeller arrangement 1—indicated by arrows in FIG. 5—and a latching opening 6 for accommodating the latching fingers 5. Latching hooks 51 are arranged at the ends of the latching fingers 5 (see FIG. 11 to FIG. 14). The latching fingers 5 are formed integrally with the shaft part 3. The latching hooks 51 engage behind the propeller part 2 at its free end face 20 facing away from the rotary shaft 10 and thus form a positive fit in the direction of the axis of rotation 1a. Furthermore, the size and shape of the latching fingers 5 and the latching opening 6 are matched so that together they form a positive connection in and against the direction of rotation P of the propeller arrangement 1, respectively. The positive connection is essentially defined by the cross-section of the latching opening 6 and the profile of the latching fingers 5.

(18) In the exemplary embodiment shown, the latching opening 6 has a rectangular cross-section. In the assembled state, the latching fingers 5 are in direct contact with at least one first flank 61 of the latching opening 6. The first 61 and/or second flanks 62 of the latching opening 6 have at least one shaped portion or depression 7 and/or at least one guide strip 8 to allow easy assembly or disassembly (FIG. 6, FIG. 8).

(19) As can be seen in FIG. 7 and FIG. 8, the latching opening 6 in the illustrated exemplary embodiment has a width b measured perpendicular to the latching direction R between two parallel first flanks 61 of the latching opening 6, which corresponds to at least one corresponding, e.g. maximum, finger width f of the latching fingers 5 (see FIG. 13). The finger width f and the width b of the latching opening 6 can be variable in the direction of the axis of rotation 1a. Furthermore, the latching opening 6 has a width w measured in latching direction R between two parallel second flanks 62, which corresponds at least to the minimum outer distance a of the latching fingers 5 from each other (see FIG. 14). This width w can also be constant in the direction of the axis of rotation 1a or change along the axis of rotation 1a.