EP2778429A1 - Engine mount for a a radial fan of a vapour extractor - Google Patents

Abstract

The suspension structure (13) has a first support arm (14) which is provided for the fixation of a cable (41) for the fan motor (3) having a hook and a groove. The first support arm is provided with a first portion for fastening to the fan motor for receiving the housing (4) of the radial flow compressor (2) and provided with a second portion for supporting the fan motor. The first portion of the first support arm is adapted for a surface mounting of the housing and the second portion for a surface mounting of the fan motor. An independent claim is included for vapor fume hood.

Description

The present invention relates to a motor suspension for a blower motor of a radial fan of an extractor hood.

For example, this describes DE 90 16 767 an extractor hood with a radial fan. The radial fan comprises a housing and an electric motor. The electric motor is held by means of a motor suspension to the housing. The engine mount comprises three support arms, which are each flanged to the housing. The support arms extend from their respective attachment portion on the housing into a fan wheel which surrounds the electric motor. A cable is connected to the motor. The cable is routed out of the housing along a support arm of the engine mount away from the engine. The cable is held by a clamp on the support arm.

An object of the present invention is to securely fix a cable for a fan motor of a radial fan of an extractor hood and exclude a contact with a fan of the radial fan. Furthermore, the cable should be performed without strong kinks or loads. Furthermore, a simple installation of the cable is desirable.

Accordingly, an engine mount for a blower motor of a radial blower of an extractor hood is provided with at least a first support arm. The first support arm has a hook and a groove for fixing a cable for the fan motor.

Thus, no additional fastening means, such as the clamp described in the introduction, need to be provided. In addition, such an engine mount can be easily manufactured. For example, the support arm with the hook and the groove can be produced as a one-piece component, in particular in a die-casting process or in any other primary molding process. The cable is securely fixed by the hook and the groove, so that contact with the fan can be excluded. Furthermore, the cable can be guided by means of the hook and the groove without strong kinks. Furthermore, the cable can be easily engaged with the hook and the groove, so that easy assembly is ensured.

For example, the cable may be a cable for powering the fan motor. Additionally or alternatively, the cable may apply control signals to the fan motor. It can also be more cables, especially a harness, are held by the hook and the groove. The cable may, for example, have a conductor and a surrounding insulation.

The fan motor may be formed as an electronically commutated DC motor, which is also referred to as a brushless DC motor (BLDC) or EC motor. The fan motor can be arranged in a fan of the radial fan, which he drives. The blower motor is arranged, for example, both in the same direction of rotation and perpendicular to this seen in the fan.

In one embodiment, the first support arm has a first section for attachment to a housing of the radial fan receiving the fan motor and a second section for mounting the fan motor. The first section may be formed, for example, for screwing the same on the housing and for this purpose in particular have a screw hole. The second section can form a receptacle for holding the fan motor with second sections of further support arms. The second section may be bolted to the fan motor. In particular, the second portion may be connected to a stator of the fan motor and have a bearing for supporting a rotor relative to the stator. In other words, the engine mount can also be formed simultaneously as a bearing plate of the fan motor. The engine mount may be integrally formed, for example as an aluminum die-cast part.

According to a further embodiment, the first portion of the first support arm for flanging on the housing and / or the second portion for flanging the blower motor is formed thereon. As a result, a simple installation is guaranteed.

In a further embodiment, the first section has the groove. As a result, the cable can be guided in the region at which it emerges from the fan wheel and thus guided over an edge region of the housing surrounding the fan wheel.

According to a further embodiment, the first portion has a side facing away from the housing in the mounted state of the engine mount, which comprises the groove. As a result, the groove is positioned so that it is easily accessible to the fitter. Additionally, pulling the cable rearwardly over the housing results in the cable being fixed in the groove.

According to a further embodiment, the side has two webs, which form the groove.

According to a further embodiment, the first support arm has, between the first and the second section, a third section which is adapted to extend into a fan wheel driven by the fan motor. The third section can extend axially into the fan wheel. The first section, however, extends radially. "Axial" and "radial" refer in the present case to a rotational axis of the fan motor.

According to a further embodiment, at least one of the webs continues in an edge reinforcement of the first, second and / or third section. This provides an easy-to-manufacture structure that provides the desired functions of reinforcement and cable management.

According to a further embodiment, the second section has the hook. This results in the favorable positioning of the hook in the vicinity of the exit point of the cable from the blower motor with regard to a secure guidance of the cable.

According to a further embodiment, the engine mount comprises at least a second support arm and an outer side of the first support arm, which faces the second support arm and on which the hook is formed. Such a positioned hook is easy to make and easy to reach for the installation of the cable.

According to another embodiment, respective directions along which the cable is engageable with the hook and groove perpendicular to its longitudinal direction form an angle between 60 ° and 160 ° with each other. Preferably, the angle is between 85 ° and 95 °. This allows the cable to be well supported and easily guided out of the fan.

According to another embodiment, a direction along which the cable is engageable with the hook perpendicularly to its longitudinal direction forms an angle between 70 ° and 90 ° with a rotational axis of the fan motor in the mounted state of the engine mount. This allows the cable to be easily engaged with the hook.

According to a further embodiment, the engine mount has exactly three support arms. The support arms may be formed asymmetrically with respect to a radial to the axis of rotation of the fan motor. Furthermore, the support arms may be formed such that the distance in the circumferential direction between the attachment points of the support arms on the housing is different.

Furthermore, an extractor hood with a radial fan is proposed which comprises a fan motor and a housing. On the housing of the blower motor is fixed by means of the bearing plate described above. The blower further comprises a cable which is fixed by means of the hook and the groove, which describes a U-shape.

According to one embodiment, the housing has a further hook for fixing the cable. As a result, the cable, for example, can be returned to the outside of the housing in a U-shaped manner after passing through the groove and fixed there by means of the further hook. Thus, the cable is securely held in the groove.

The groove may be designed in the form of a constriction, so that the cable clamped in this and thereby frictionally secured in the groove.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments of the engine mount or the extractor hood described above or below with respect to the exemplary embodiments. The skilled person will also add or modify individual aspects as improvements or additions to the respective basic form of the invention.

Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of preferred embodiments with reference to the attached figures.

• Fig. 1: in einer perspektivischen Ansicht ausschnittsweise eine Dunstabzugshaube;
• Fig. 2: in einer Seitenansicht einen Lagerschild aus Fig. 1;
• Fig. 3: eine Ansicht III aus Fig. 2;
• Fig. 4: den Lagerschild aus Fig. 2 in einer Draufsicht; und
• Fig. 5: einen Schnitt V-V aus Fig. 4.

It shows:

• Fig. 1 : In a perspective view, a partial extractor hood;
• Fig. 2 : in a side view of a bearing plate Fig. 1 ;
• Fig. 3 : a view III off Fig. 2 ;
• Fig. 4 : the end shield Fig. 2 in a plan view; and
• Fig. 5 : a cut VV off Fig. 4 ,

In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

Fig. 1 shows a perspective view of a partial extractor hood. 1

The extractor hood 1 comprises a double-flow radial fan 2 to draw off vapors from a hotplate, not shown. The extractor hood 1 can be configured as recirculation or exhaust air device.

The blower 2 comprises a blower motor 3, which, because in Fig. 1 hidden, dashed lines is shown. The fan motor 3 may be formed as an electronically commutated DC motor.

The fan 2 further comprises a housing 4. The housing 4 may, as shown, be designed as a spiral housing. The housing 4 may be composed of two housing halves 5, 6, which are axially fastened to each other to form the housing 4. "Axial", "radial" and "in the circumferential direction" always refer here to an axis of rotation 7 of a not-shown rotor of the fan motor 3. The rotor may be formed as an internal rotor.

The blower 2 also has a fan 11, which is arranged in an axial opening 12 of the housing 4.

As seen in the axial direction, the fan motor 3 is arranged within the fan wheel 11 both inside and radially, that is to say perpendicular to the axis of rotation 7. The blower motor 3 is coupled in a manner not shown with the fan 11 and drives it.

The fan motor 3 is held within the fan 11 by means of a motor suspension 13, which also forms a bearing plate of the fan motor 3 at the same time. For this purpose, the blower motor 3 is flanged to the engine mount 13. The engine mount 13 is in turn flanged to the housing 4.

The structure of the engine mount 13 will be described below with reference to FIGS. 2 to 5 explained in more detail, wherein FIG. 2 the engine mount 13 in a side view, FIG. 3 a view III from FIG. 2 . FIG. 4 the engine mount 13 off FIG. 2 in a plan view and FIG. 5 a cut VV off FIG. 4 shows.

The engine mount 13 comprises three support arms 14, 15, 16. The support arms 14, 15, 16 each have a first section 17 and a second section 21, which are explained in more detail below merely with reference to the support arm 14.

The first portion 17 is radially aligned and formed with a screw hole 22 to this at a radial edge 23 (see FIG. 1 ) of the housing 4, which limits the opening 12, to be fastened by means of a screw, not shown.

The second sections 21 of the support arms 14, 15, 16 together form a receptacle 24 in which the fan motor 3 is mounted. The second portions 21 are fixedly connected to a not-shown stator of the blower motor 3 in the assembled state of the engine mount 13. The second sections 21 connect to a bearing cup 28, which receives a bearing for the rotor of the fan motor 3. A third section 25 extends between the first and second sections 17, 21. The third section 25 extends axially and adjoins the first section 17 via a curved section 26. Thus, the third portion 25 extends from the edge portion 23 into the fan 11 toward the fan motor third

The first section 17 has a groove 27, which in the view III from FIG. 3 can be seen closer. The groove 27 is formed on one side of the first portion 17, which is denoted by 31 and facing away from the edge 23. On the side 31, two opposing webs 32, 33 are formed, which form the groove 27 between them. For example, the web 32 in an edge reinforcement 34 of the first, second and third sections 17, 21, 25 of the support arm 14 continue. The edge reinforcement 34 is in FIG. 5 to recognize which the cut VV from FIG. 4 shows. Here it can be seen that the first support arm 14 has an S-shaped cross-section, wherein the one end forms the edge reinforcement 34. The web 33, however, extends only over a portion of the first portion 17 and does not continue in an edge reinforcement.

The second section 21 comprises a hook 35 (see FIG. 4 ). The hook 35 is at an in FIG. 5 shown outer side 36 of the edge reinforcement 34 of the second portion 21 formed.

According to the present embodiment, only one support arm 14 has the groove 27 and the hook 35. In other embodiments, the other support arms 15, 16 could also have a groove 27 and a hook 35.

The engine mount 13 is for example as a one-piece component, which in particular includes the groove 27, the hook 35, the first, second and third sections 17, 21, 25 and the bearing cup 28, for example produced by die-casting.

The support arms 14, 15, 16 may be formed so that they with respect to a radial 37 (by way of example by the support arm 14 in FIG FIG. 4 explained) are not symmetrical. Furthermore, the support arms 14, 15, 16 may be uneven. For example, the shape of the support arm 16 deviates from that of the support arms 14 and 15. Further, the screw holes 22 may be unequally spaced from each other in the circumferential direction (relative to the longitudinal axis 7), as in FIG FIG. 4 to recognize.

Returning to FIG. 1 is there shown that the radial fan 2 comprises a cable 41 which is connected at its one end 42 to the blower motor 3 in order to supply it with electrical energy and optionally to apply control signals. The cable 41 is fixed in the hook 35 and in the groove 27. Furthermore, the cable can be U-shaped around the edge 23 and thus in FIG. 1 led back to another hook 43 and fixed to the hook 43. The hook 43 is arranged axially centrally on a lateral surface 45 of the housing halves 4, 5.

The cable 41 may, for example, in a direction 44 (see FIG. 4 ) are brought into engagement with the hook 35 perpendicular to the longitudinal direction of the cable 41. The direction 44 is oriented parallel to the radial 37, thus forms an angle of 90 ° with the axis of rotation. 7

The engagement of the cable 41 with the groove 27 takes place in the axial direction perpendicular to the longitudinal axis of the cable 41st

The groove 27 could also be formed in the form of a constriction, so that the cable 41 is clamped in the constriction and thereby frictionally held in the groove 27.

Although the present invention has been described with reference to embodiments, it is variously modifiable.

Used reference signs:

1

Hood

2

centrifugal blower

3

blower motor

4

casing

5

housing half

6

housing half

7

longitudinal axis

11

fan

12

opening

13

end shield

14

Beam

15

Beam

16

Beam

17

first section

21

second part

22

screw

23

edge

24

admission

25

third section

26

curved section

27

groove

28

bearing cup

31

page

32

web

33

web

34

edge reinforcement

35

hook

36

outside

37

radial

41

electric wire

42

The End

43

hook

44

direction

45

lateral surface

Claims (15)

Motor suspension (13) for a blower motor (3) of a radial blower (2) of an extractor hood (1), with at least a first support arm (14), which for fixing a cable (41) for the blower motor (3) has a hook (35) and a groove (27). Motor suspension according to Claim 1, characterized in that the first support arm (14) has a first section (17) for attachment to a housing (4) of the radial fan (2) accommodating the fan motor (3) and a second section (21) for holding the housing Blower motor (3). Motor suspension according to claim 2, characterized in that the first portion (17) of the first support arm (14) for flanging on the housing (4) and / or the second portion (21) for flanging the fan motor (3) formed thereon is. Motor suspension according to claim 2 or 3, characterized in that the first portion (17) has the groove (27). Motor suspension according to claim 4, characterized in that the first portion (17) in the assembled state of the engine mount (13) has a side facing away from the housing (4) (31), which comprises the groove (27). Motor suspension according to claim 5, characterized in that the side (31) has two webs (32, 33) which form the groove (27). An engine mount according to any one of claims 2-6, characterized in that the first support arm (14) between the first and second sections (17, 21) has a third section (25) adapted to move into one of the blower motor (16). 3) driven fan wheel (11) extend into it. Motor suspension according to claim 6 or 7, characterized in that at least one of the webs (32) in an edge reinforcement (34) of the first, second and / or third portion (17, 21, 25) continues. Engine mounting according to one of claims 2-8, characterized in that the second portion (21) has the hook (35). An engine mount according to any one of claims 1-9, characterized by at least one second support arm (15, 16) and an outer side (36) of the first support arm (14) which faces the second support arm (15) and on which the hook (35) is formed. An engine mount according to any one of claims 1-10, characterized in that respective directions along which the cable (41) perpendicular to its longitudinal direction with the hook (35) and the groove (27) is engageable, an angle between 60 ° and Form 160 ° with each other. Motor suspension according to one of claims 1-11, characterized in that a direction along which the cable (41) perpendicular to its longitudinal direction with the hook (35) is engageable, an angle between 70 ° and 90 ° with a rotation axis ( 7) of the fan motor (3) in the mounted state of the engine mount (13). Engine mounting according to one of claims 1 - 12, characterized by exactly three support arms (14, 15, 16). Extractor hood (1) comprising a radial fan (2) comprising a fan motor (3) and a housing (4) to which the fan motor (3) is attached by means of an engine mount (13) according to any one of claims 1-13, wherein Cable (41) for the blower motor (3) by means of the hook (35) and the groove (27) of the engine mount (13) is fixed. Extractor hood according to claim 14, characterized in that the housing (4) has a further hook (43) for fixing the cable (41).

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