IMPELLER RECEPTACLE

Abstract

The invention relates to an impeller receptacle, in particular for an impeller of a fan, comprising at least one rotationally symmetrical body. The rotationally symmetrical body has a first end face, a second end face and a lateral face, wherein at least one radial bore extends radially from the lateral face into the rotationally symmetrical body and an assembly recess extends from the first end face into the radial bore. A detent ball having a ball diameter and a spring are arranged in the at least one radial bore, wherein the detent ball can be pressed radially outwards by means of the spring. The radial bore has at least one first, inner radial bore diameter and a second, outer radial bore diameter, the second, outer radial bore diameter being smaller than the ball diameter.

Claims

1. Impeller mount comprising: at least one rotationally symmetrical body, the rotationally symmetrical body comprising a first end face, a second end face and a lateral surface, with at least one radial bore starting from the lateral surface radially into the rotationally symmetrical body and a mounting recess extends from the first end face into the radial bore, with a locking ball in the at least one radial bore with a ball diameter and a spring, the locking ball configured to be pressed radially outwards by the spring, the radial bore having at least a first, inner radial bore diameter and a second, outer radial bore diameter, wherein the second, outer radial bore diameter is smaller than the ball diameter.

2. An impeller mount according to claim 1 wherein the radial bore diameter changes continuously and/or discretely over a length of the radial bore.

3. An impeller mount according to claim 1 wherein the first radial bore diameter is larger than the ball diameter.

4. An impeller mount according to claim 1 wherein a bore base of the radial bore forms a counter bearing for the spring.

5. An impeller mount according to claim 1 wherein the locking ball is introduced into the radial bore via the mounting recess.

6. Impeller mount according to claim 1 wherein the at least one radial bore has a first section comprising the first inner radial bore diameter and a second section immediately adjacent to the first section and comprising the second outer radial bore diameter.

7. Method for assembling an impeller mount according to claim 1 with the steps of: provide a rotationally symmetrical body comprising a first end face, a second end face, a lateral surface, at least one radial bore and at least one mounting recess, wherein the radial bore starting from the lateral surface extends radially into the rotationally symmetrical body and the mounting recess extends from the first end face into the radial bore, inserting a locking ball through the mounting recess into the radial bore, introducing a spring through the mounting recess into the radial bore in such a way that the spring presses the locking ball radially outwards.

8. Impeller comprising a receiving recess which has a receiving recess diameter, wherein an inner wall of the receiving recess has at least one undercut, wherein the receiving recess has an impeller mount is arranged according to claim 1, wherein the receiving recess diameter is larger than a diameter of a rotationally symmetrical body of the impeller mount and wherein the at least one locking ball of the impeller mount engages at least partially in the undercut.

9. Suction device for cooking fumes at least comprising: a fan wheel and a motor, the fan wheel having a wheel with an impeller mount according to claim 1 that is coupled to the motor.

10. (canceled)

11. (canceled)

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG. 1 is a wheel mount in a side view;

[0039] FIG. 2 is a impeller mount from FIG. 1 in a view of a second side;

[0040] FIG. 3 is an impeller mount from FIG. 1 in sectional view from FIG. 1;

[0041] FIG. 4 is a longitudinal section IV-IV of the impeller mount from FIG. 2;

[0042] FIG. 5 is a detail view from FIG. 4;

[0043] FIG. 6 is a perspective view of an impeller;

[0044] FIG. 7 is a section view of the impeller from FIG. 6; and

[0045] FIG. 8 is a sectional view of a suction device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] FIG. 1 shows a wheel mount 10 in a side view. The impeller mount 10 has a rotationally symmetrical body 20. This has a height 24 and a diameter 22 on a first end face 28 is arranged on a first side 12 of the rotationally symmetrical body 20 and a second end face 26 is arranged on an opposite second side 14. The end faces 26, 28 border on a lateral surface 30. The rotationally symmetric body 20 has a cylindrical portion 16 and a conical portion 18, wherein the cylindrical portion 16 of the first side 12 and the conical portion 18 of the second side 14 is associated. The rotationally symmetrical body 20 has a plurality, for example about 10, radial bores 32 on starting from the lateral surface 30, in particular in the cylindrical section 16, these extend radially into the rotationally symmetrical body 20.

[0047] Indicated in dashed lines are hidden edges of the radial bores 32 and other recesses, which are not further identified for the sake of clarity.

[0048] FIG. 2 shows a top view of the second side 14, which is indicated in FIG. 1, of the rotationally symmetrical body 20 of the impeller mount 10. Starting from the second end face 26, a motor shaft receptacle 50 extends through the rotationally symmetrical body 20 in a longitudinal direction (not designated).

[0049] Indicated in dashed lines are hidden edges of the radial bores 32 and the mounting recess and other recesses, which for the sake of clarity are not designated further.

[0050] FIG. 3 shows a cross section from FIG. 1. The individual radial bores 32.1, 32.2., 32.3, are not all labeled for the sake of clarity, are designed as blind holes and each have a drill bottom 44.1, 44.2, 44.3, which are not all named for the sake of clarity. Examples are locking balls in three radial bores 32.1, 32.2, 32.3, 40.1, 40.2, 40.3 arranged. For the sake of clarity, the remaining locking balls 40.4 to 40.10 in the undesignated radial bores 32.4 to 32.10 have not been shown. Furthermore, in the exemplary radial bores 32.1, 32.2., 32.3 springs 42.1, 42.2, 42.3 introduced, which are arranged radially inwards to the locking ball 40.1, 40.2, 40.3. The springs 42.1, 42.2, 42.3 are supported against the respective bottom of the hole 44.1, 44.2, 44.3 of the radial bore 42.1, 42.2, 42.3. In addition, mounting recesses 46 open into the radial bores 42.1, 42.2, 42.3, not all of which are labeled for the sake of clarity. Through these are the detent balls 40.1, 40.2, 40.3 and springs 42.1, 42.2, 42.3 can be introduced into the respective radial bore 32.1, 32.2., 32.3.

[0051] The locking balls 40.1 to 40.3 are pressed radially outwards by the springs 42.1 to 42.3, so that they extend beyond the lateral surface 30 of the rotationally symmetrical body 20 protrude. The radially outermost points of the locking balls 40.1 to 40.3 lie essentially on a spherical circle 43, which is the maximum circumference of the impeller receptacle 10 at the same time.

[0052] FIG. 4 shows a longitudinal section IV-IV from FIG. 2. By way of example, a spring 42.1 and a locking ball 40.1 are arranged in one of the radial bores 32.1, which is accessible via the assembly recess 46.1. A ball diameter 41 is smaller than a first, inner radial bore diameter 34 of the radial bore 32.4 shown in the detailed view V in FIG. 4. The configuration of the radial bore 32.4 shown as an example in FIG. 5 is essentially identical to the respective configuration of the other radial bores 32.1 to 32.3 and 32.5 to 32.10. At the same time, the ball diameter 41, which is essentially the same for all locking balls, is larger than a second, outer radial bore diameter 36 of the radial bore 32.4 shown in the detailed view V in FIG. 4. The locking ball 40.1 is thus pressed by the spring 42.1 against the non-designated section of the radial bore 32.1 with the second, outer radial bore diameter 36. The section of the radial bore 32.1 with the second, outer radial bore diameter 36 thus prevents the locking ball 40.1 from falling out of the radial bore 32.1.

[0053] Furthermore, this arrangement ensures that a spherical cap of the locking ball 40.1 protrudes beyond the lateral surface 30 of the rotationally symmetrical body 20. The motor shaft mount 50 can also be seen in FIG. 5 and also shows that a recess is formed between the section with the second, outer radial bore diameter 36 and the section with the first, inner radial bore diameter 34, against which the locking ball (not shown) abuts.

[0054] In a further embodiment, a continuous transition can be provided between the section with the second, outer radial bore diameter 36 and the section with the first, inner radial bore diameter 34. In particular, the section with the second, outer radial bore diameter 36 and the section from the first, inner radial bore diameter 34 can be designed as described in the general description.

[0055] FIG. 6 shows an impeller 52 in a perspective view with a thread 53 for receiving a handle on a first side 62.

[0056] FIG. 7 shows a longitudinal section of the impeller 52 from FIG. 6. This has a thread 53 for receiving a handle on the first side 62. A receiving opening 54 is associated with a second side 64. The receiving opening 54 is designed in such a way that it can receive the impeller seat 10. In particular, the receiving opening 54 has an inner wall 58 which is profiled and divides the receiving recess 54 into several sections. The receiving opening 54 has an insertion section 70, which is conical and widens towards the second side 64. Furthermore, the receiving opening 54 has a constriction 66. Furthermore, the receiving opening has a fitting section 68, which has a larger diameter, which is not shown for the sake of clarity, than the constriction 66. As a result, an undercut 60 is formed. If the impeller mount 10 is inserted into the impeller 52, its locking balls 40 are pressed radially inwardly into the radial bore when passing through the constriction 66. If the impeller 52 is inserted into the fitting section 68, the locking balls 40 are partially pushed out again by the springs 42, so that they lie against the inner wall 58 of the receiving recess 54.

[0057] FIG. 8 shows a cross section of a suction device 90 comprising a fan wheel 92 and a motor 94. The fan wheel 92 is coupled to the motor 94 by means of the impeller 52 with the impeller mount 10. A motor shaft 96 of the motor 94 protrudes into the motor shaft receptacle 50 of the impeller 10 and is connected to this particular friction. The impeller mount 10 is inserted into the impeller 52, the locking balls 60 being pressed radially outwards from the radial bores 32 by springs 42 and engaging in an undercut 60 of the impeller 52.

[0058] With the impeller mount 10 described, assembly in the impeller 52 can be significantly simplified, since the locking balls 40 are arranged captively in the radial bores 32. Furthermore, the spherical circle 43 formed by the locking balls 40 is so precise that the mounted impeller 52 runs more smoothly than is known from the prior art.