EP2430329A1

EP2430329A1 - Adjustment device for a rotating body and rotating body

Info

Publication number: EP2430329A1
Application number: EP10717120A
Authority: EP
Inventors: Markus Liedel; Thomas Helming
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2009-05-13
Filing date: 2010-04-28
Publication date: 2012-03-21
Also published as: KR20120022928A; US20120128492A1; WO2010130578A1; DE102009003056A1; US9182008B2; JP2012526942A; KR101704408B1; CN102459948A

Abstract

The invention relates to an adjustment device (30) for a rotating body (10; 21; 22), in particular a fan (10) of a cooling fan for a combustion engine, or a shaft (21) or a rotor (22) of an electric motor (20), comprising a rotation axis (R), wherein a mass (311; 10; 11; 14) that rotates around the rotation axis (R) can be dislocated relative to the rotation axis (R) by means of the adjustment device (30). The invention further relates to a rotating body (10; 22), in particular a fan (10) of a cooler blower for a combustion engine, or a shaft (21) or a rotor (22) of an electric motor (20), comprising an adjustment device (30) according to the invention.

Description

description

title

Adjusting device for a rotary body, as well as rotary body

The invention relates to an adjusting device for a rotary body, in particular a fan of a cooling fan of an internal combustion engine or a shaft or a rotor of an electric motor. Furthermore, the invention relates to a rotary body, in particular a fan, a shaft or a rotor.

State of the art

Dynamic imbalances arise when an axis of rotation of a component or body of revolution does not coincide with one of the stable principal axes of inertia of the component. The prior art is that the fan cooling of an internal combustion engine and other rotating components, such. As motor armature, driver, rotor, geometrically designed so that they produce as possible, while maintaining the nominal dimensions no dynamic imbalance. However, real component geometries show shape and position deviations compared to an ideal tolerance-free model, which always results in a dynamic imbalance.

In order to limit the maximum dynamic imbalance, components of cooling fans with low dimensional and positional tolerances must be manufactured. Furthermore, the effects of dynamic imbalance are often limited by elaborate damping and / or decoupling measures.

Currently, high dynamic imbalance of cooling fans in motor vehicles complained because they stimulate mechanical vibrations and thereby noise, steering wheel flutter or possibly even rapid bearing wear of the blower motors can trigger. With increasing fan dimension, in particular a fan diameter, and noise sensitization, this problem increases.

In addition, the trend in the automotive industry is that, motivated by the task of minimizing CO ₂ , the weight reduction of driving be driven forward and extremely rigid, lightweight front ends and body structures without decoupling, damping elements or absorber masses are increasingly applied. As a result, the transmission behavior of the mechanical unbalance caused by mechanical vibrations (forces) is adversely affected in a passenger compartment; the described problem increases. Previous specifications still provide practicable dynamic imbalance limits, which currently lie at a maximum of 25,000 g-mm ² . In future, however, dynamic imbalance limits of a maximum of 1,500-2,000 g-mm ^{2 are} required. With the design concepts and manufacturing methods known today, such requirements can no longer be economically realized because either very high reject rates are to be expected or the fans become too expensive.

task

It is an object of the invention to provide an improved rotary body, in particular an improved fan of a cooling fan or an improved rotor of an electric motor. In this case, it should be possible to subsequently minimize a dynamic imbalance of the rotational body, wherein preferably a subsequent correction possibility of an alignment of a

Main axis of inertia on the rotation body should be possible. Furthermore, the rotation body according to the invention should be simple in design and inexpensive to produce.

Disclosure of the invention

The object of the invention is by means of an adjusting device for a rotary body, in particular a fan of a cooling fan of an internal combustion engine, or a shaft or a rotor of an electric motor, according to claim 1, and by means of a rotary body, in particular a fan, a shaft or a rotor, with a Adjusting device according to the invention, solved according to claim 13. Advantageous developments of the invention will become apparent from the dependent claims.

The adjustment device according to the invention for a rotation body, having a rotation axis, is set up such that a mass rotatable about the rotation axis, in particular a mass of the rotation body, with respect to the Rotatable axis displaceable - that is movable, swiveling, positionable etc - is. The rotation body according to the invention in this case has the adjustment device according to the invention, wherein it is releasably provided on or firmly in / on the rotation body or integrated into the rotation body. By means of the adjustment z. Example, a distribution of a rotatable mass, an arrangement of the rotating body and / or an arrangement of a portion of the rotating body, with respect to the axis of rotation variable, preferably a main axis of inertia of the rotating body is adapted to the axis of rotation. Thus, the principal axes of inertia of a component or of a component composite can be brought at least approximately into agreement with the axis of rotation.

By means of the adjusting device, a rotatable mass is displaceable along and / or at an angle with respect to the axis of rotation. Furthermore, the rotational body or a portion of the rotational body can be displaced at least partially relative to the axis of rotation by means of the adjusting device. According to the invention, it is possible in this case to shift the respective rotatable mass in terms of time after a certain assembly of the rotary body, ie. H. to compensate for the imbalance.

In a variant of the invention, a displaceable rotatable mass is a

Balancing mass, which is translationally or rotationally movable with respect to the axis of rotation by means of an adjusting mechanism. In a second variant of the invention, a displaceable rotatable mass is the entire rotary body or a portion of the rotary body which is pivotable relative to the axis of rotation by means of a tilting mechanism. In a third variant of the invention, a displaceable rotatable mass is a section of the rotation body which can be positioned by means of a displacement mechanism with respect to another section of the rotation body.

In the first variant of the invention, the adjusting mechanism may comprise a threaded element and / or a guide, by means of which or in which the balancing mass is movable with respect to the axis of rotation. Here, the adjusting mechanism to a holder, for. B a clip, be provided, which can also be releasably connected to the rotary body. Furthermore, in the first variant of the invention, the adjusting mechanism on the

Rotary body mountable carrier having a possibly displaceable with respect to the carrier balancing mass, wherein the carrier rigidly connected to the Rotationskör- is connectable by, or translationally and / or rotationally movable against the rotational body is providable. In the second variant of the invention, the tilting mechanism may comprise a spring element or an optionally curable, elastically and / or plastically deformable element, in particular a rubber or elastomer element, by means of which the rotation body with respect to the

Rotation axis is swiveled or displaced. In the third variant of the invention, the displacement mechanism may comprise a threaded element or a wedge, by means of which a portion of the rotation body can be positioned or adjusted or clamped relative to another portion of the rotation body.

According to the invention, the dynamic imbalance of a rotational body, for. As a blower, are significantly reduced and adjusted, creating a technical competitive advantage. Furthermore, the invention is simple, thus robust and therefore inexpensive to implement. Furthermore, it is possible to

To provide retrofitted invention, which does not replace already existing rotating body or existing production lines do not need to be converted.

Brief description of the figures

The invention will be explained in more detail below with reference to embodiments with reference to the accompanying drawings. In the drawing, FIGS. 1, 3, 13, 17 and 22 show a fan or a fan and its mounting on a motor shaft or a motor rotor, according to the prior art, for a cooling fan of an internal combustion engine of a motor vehicle. 2, 4 to 1 1 and 14 to 16 show a plurality of embodiments of a first variant of the invention, wherein an adjusting device for the fan or the motor rotor are designed as an adjusting mechanism, by means of which a mass along an axis of rotation of the fan or of the motor rotor is movable. 18 to 21 show a plurality of embodiments of a second variant of the invention, wherein an adjusting device for the fan is designed as a tilting mechanism, by means of which the fan is pivotable with respect to its axis of rotation. And FIGS. 23 to 27 show a plurality of embodiments of a third variant of the invention, wherein an adjustment device of the fan is designed as a displacement mechanism, by means of which chem a portion of the fan relative to another portion of the fan is displaceable

Embodiments of the invention

The invention described below with reference to a fan 10, a motor shaft 21 and a motor rotor 22 is not intended to be limited to such rotation body 10, 21, 22, but should be applied to all rotation body, preferably on rotational body with flat, disk-shaped design. This applies z. For axial fans in computers, radial fans for heaters,

Household fans, crankshaft pulleys, gears, etc. Furthermore, below a body is not to be understood as a materially integral body, but it should also be understood something that may have multiple components, d. H. be understood in the sense of component or device; and rotation body 10, 21, 22 is to be understood to mean a body in the above sense, which is set up and suitable for rotating around an axis of rotation R at least theoretically stably. Arrows in the drawing indicate each movement possibilities of a relevant part or section.

The invention relates, for. As a rotating fan with a component or component assembly, which allows it at least once, subsequently selectively set a inertia axis alignment of an axial fan or fan components permanently. As a result, the dynamic imbalance of individual fan components, in particular the fan 10, or the entire fan can be optimized. Embodiments or features of the three variants of the invention described below can be combined with one another.

The first variant of the invention is characterized in that the fan 10th

(Rotating body 10) or the motor rotor 22 (rotary body 22) or the motor shaft 21 (rotary body 21) has an adjusting mechanism 30 designed as an adjusting mechanism 310, by means of which a balancing mass 311 relative to the fan 10 and the motor rotor 22 and the motor shaft 21 movable is. The balancing mass 311 is translational and / or rotational with respect to the axis of rotation R, ie the fan 10 or the motor rotor 22 or the motor shaft 21 displaceable or movable, and supported. Preferably there are three adjusting mechanisms 310 according to the invention on a fan 10; Of course, any other number is also applicable - this also applies to the other variants of the invention. According to the adjustment mechanism 310 is integrated in a fan, which causes a change in position of a mass distribution of the fan, which z. B. by an additional mass (balancing mass 31 1) on a screw / spindle; a clamped in an external thread and displaceable weight (balancing mass 31 1); or any other precaution can be achieved which subsequently locally changes a mass in its preferred axial position, z. B. by means of a collar or a rotary weight.

In one embodiment, the adjustment mechanism 310 - shown on a fan 10, which is connected to a motor shaft 21 of a conventional electric motor 20 for a blower (Fig. 2) and a motor rotor 22 (Figs. 4 and 5) (attachment 15) - a threaded member 312, such as. B. a threaded rod 312nd

(Figures 2 and 4) or a screw 312 (Figure 5), with fastening and Verstellkontur; the movable means of the threaded element 312 balancing mass 31 1 z. B. is formed as a nut 31 1; and a guide 313. The balancing mass 31 1 sits with its internal thread on an external thread of the threaded element 312 and is geometrically inhibited by the guide 313 from co-rotating with the threaded element 312. The adjusting mechanism 310 extends along an axial portion 13 of a hub 1 1 of the fan 10 parallel to the axis of rotation R of the fan 10, whereby the balancing mass 31 1 by means of the threaded member 312 is substantially parallel to the rotation axis R movable. The threaded element 312 is preferably mounted with a head on preferably an outer radial section 12 of the fan 10, which has a device for rotating the threaded element 312. Here, FIGS. 2 and 4 show alternative guides 313 for the balancing mass 31 1, which are each formed by a region of an axial section 13 of the fan 10 and form a type of shaft. Furthermore, FIG. 5 shows a screw 312 with a speed groove as the threaded element 312.

6 to 8 show possible alternatives to a threaded element 312, wherein the balancing mass 31 1 is no longer geometrically inhibited in the guide 313, but is held or clamped in the guide 313 in a complete or sectional circumferential direction. In this case, the balancing mass 31 1 can be accessible from one or both end faces of the fan 10. Preferably For this purpose, a through-passage 316 in an outer edge region of the radial section 12 of the fan 10 centrally above the guide 313, through which the balancing mass 311, z. B. is accessible to a screwdriver or other tool. In FIG. 6, the balancing mass 31 1 has an external thread which can be screwed up and down in an internal thread of the guide 313; the guide 313 is designed as a kind Schraubdom. Fig. 7 shows a clamped in the guide 313 balancing mass 31 1, but along the axis of rotation R is displaceable, which is illustrated by two power arrows. FIG. 8 shows an only partially gripped thread for the balancing mass 311.

The embodiments according to FIGS. 9 to 12 show on a rotary body 10, 21, 22 subsequently providable adjusting mechanisms 310, which each have the threaded element 312, which by means of the threaded element 312 movable balancing mass 31 1 and a holder 314. Here, the holder 314 z. Example, as a retaining clip 314 (Fig. 9 to 1 1) or a holding arm 314 (Fig. 1 1) may be formed.

FIGS. 9 and 10 show an adjusting mechanism 310 with a screw 312 as a threaded element 312, the head of which is fixed to a motor rotor 22 by means of the retaining clip 314. The screw 312 extends in the axial direction on the motor rotor 22, wherein an outer (Fig. 9) and an inner side (Fig. 10) of the motor rotor 22 as a guide 313 for the balancing mass 31 1 on the screw

312 serves. Furthermore, an inner side of the fan 10 can additionally serve as a guide 313 (FIG. 9). FIG. 11 shows, as an adjusting mechanism 310, a threaded rod 312 which is fastened to the fan 10 by means of a holding clip 314, wherein the threaded rod 312 is accessible through a passage recess 316 in the fan 10 for an adjusting tool; opposite the retaining clip 314 is provided and connected to the fan 10. FIG. 12 shows an adjusting mechanism 310 which is coupled to the motor shaft 21, wherein a threaded rod 312 is provided at a distance from the motor shaft 21 via a holding arm 314. The threaded rod 312 is adjacent to an inner side of the hub 1 1 and essentially provided parallel to the axial section 13 thereof. A guide 313 for sitting on the threaded rod 312 balancing mass 31 1 is taken from the adjacent inner side, ie a wall, the hub 1 1.

In the embodiment according to FIG. 14, the fan 10 has at its axial section 13 a disk-shaped carrier 315 which has an eccentrically arranged carrier

Balancing mass 31 1 has. Here, the support 315 is provided with its large-area side substantially parallel to the axial section 13 and rotatable associated with this. Depending on one, z. B. by means of a screw or a latching mechanism (both not shown), fixable rotational position of the carrier 15 takes the balancing mass 31 1 another position (height) on the fan 10, whereby an imbalance compensation is possible. 15 and 16 show a carrier 315 which is arranged parallel to the radial portion 12 of the hub 1 1 of the fan 10 and rotatably connected thereto with respect to the rotation axis R. A rotational position is in turn, z. B. by means of a screw or a latching mechanism (both not shown) can be fixed. The carrier 315 has at least one eccentrically located balancing mass 31 1 which is mounted in the carrier 315 (guide 313) and whose height can be changed with respect to the carrier 315. A

Height position of the balancing mass 31 1 is in turn fixed.

The second variant of the invention is characterized in that the fan 10 (rotary body 10) has an adjusting device 30 designed as a tilting mechanism 320, by means of which the fan 10 can be pivoted or tilted relative to the axis of rotation R. In this case, the entire fan 10 is preferably displaceable with attachments (not shown in FIGS. 18 to 21) relative to the axis of rotation R; However, embodiments are possible in which only parts or portions of the fan 10 can be pivoted or tilted. According to the second variant, a change in an angular position between a fan plane and the axis of rotation R, wherein z. B. a fan mounting screw (15) is tightened and an elastic element such. As an O-ring, a spring or a curable component, etc. deformed. It is preferred that a fastening 15 of the fan 10 functions as a component of the tilting mechanism 320; Of course, it is also possible to provide an independent tilting mechanism (also not shown in FIGS. 18 to 21).

In one embodiment (Figures 18 and 19) of the invention, a fixed stop 323 (prior art, Figure 17) of the fan 10 on the motor rotor 22 is replaced by a deformable member 321. Ie. between the motor rotor 22 and the hub 1 1, in particular its radial portion 12, the deformable element 321 is provided as a kind of spacer. In each case, a deformable element 321 is preferably provided around a fastening screw of the fastening 15. Of course, it is also possible to provide a single deformable element 321 around all fasteners 15. It is now possible according to the invention, depending on how firmly a respective fastening screw ange- is set to set an angular position of the entire fan 10 or a part thereof with respect to the rotation axis R in certain angular limits (Fig. 19), whereby a subsequent adjustment of the axes of inertia is realized. The deformable element 312 is elastically and / or plastically deformable, optionally curable and in particular as a rubber element, an elastomer element, a

O-ring or an X-ring etc. formed. It is also possible to design the fixed stop 323 such that it can be plastically or elastically deformed by the attachment 15 of the fan 10; the deformable elements 321 can then be omitted if necessary.

In the embodiment illustrated in FIG. 20, the deformable elements 321 are curable. In this case, the fan 10 is mounted on the motor rotor 22 and the fasteners 15 are set up such that as little or as little as possible unbalance of the fan 10 on the motor rotor 22 is established. Subsequently, the deformable elements 321 are subjected to a curing process. This can be z. B. by activation (UV irradiation, heat, etc.) of a z. B. highly viscous and possibly preformed thermosetting compound. In the embodiment shown in FIG. 21, instead of the deformable elements 321, spring elements 322, such. As a coil spring, a plate spring, etc. applied.

The third variant of the invention is characterized in that the fan 10 (rotary body 10) has a displacement mechanism 30 designed as a displacement mechanism 330, by means of which a portion of the fan 10 can be displaced, pivoted, tilted or tilted relative to another portion of the fan 10 . is positionable, whereby a rotational behavior of the fan 10 about the rotation axis R is adjustable. In this case, preferably, a mechanical tension of the components to each other, which z. B. leads to a unilaterally adjustable shape or position change, deformed or tilted the portions of the fan 10. This is done z. B. by means of an axial and / or lateral adjusting screw, an adjustable wedge, a spacer, a clamping spindle, a clamping band and / or other, which affects a mutual position or a mechanical tension of the fan 10 adjustable. Here, a wing 14 of the fan 10 relative to the hub 1 1 of the fan 10 is preferably positionable. Instead of a mechanical bracing, a joint (not shown in FIGS. 23 to 27) can be set up by means of which the two sections are provided so as to be pivotable relative to one another. FIGS. 23 and 24 show an embodiment of such a displacement mechanism 330, with a lateral threaded element 331, in the present case designed as an adjusting screw 331, in a preferably lower (with reference to FIGS. 23 and 24) axial section 13 of the hub 11 an outside of the motor rotor 22 can be screwed, wherein the adjusting screw 331 does not engage in the motor rotor 22. This causes a relative section of the fan to move

10 away from the motor rotor 22. In the present case this is a section of the hub

1 1 and an associated wing 14, wherein the relevant portion of the hub 1 1 and the remaining part of the hub 1 1 braced against each other. An in the motor rotor 22 screwed adjusting screw 331 (threaded member 331) is in the

Fig. 25 shows, whereby the relevant portion of the fan 10 can be moved in an opposite direction; d. H. the relevant section of the hub 1 1 moves toward the motor rotor 22.

It is also possible, the threaded member 331 axially along the axis of rotation

R, wherein it is as shown in FIG. 26, preferably in the radial section 12 of the hub 1 1 and there preferably in an outer edge region of the radial section 12 is provided. In this case, the threaded element 331, which is also designed as a screw 331, can be screwed against the motor rotor 22, with the relevant section of the hub 11 preferably including one wing

14 away from the motor rotor 22. In this case, the screw 331 does not engage in the motor rotor 22. A kinematic reverse embodiment is of course possible, the screw 331 then z. B. can be screwed into the front side of the motor rotor 22 (in FIGS. 23 to 27 not shown). The application of a wedge 332 is shown in FIG. 27. In this case, a wedge 332 is inserted between the hub 11, in particular its axial section 13, and the motor rotor 22, as a result of which a relevant section of the hub can be moved away from the motor rotor 22. In this case, it is preferred that, for mutually locking wedge 332 and hub 1 1, alternatively the motor rotor 22, mutually corresponding latching devices be provided.

Claims

claims

1 . Adjusting device for a rotary body (10, 21, 22), in particular a fan (10) of a cooling fan of an internal combustion engine, or a shaft (21) or a rotor (22) of an electric motor (20), having a rotation axis (R), characterized in that by means of the adjusting device (30), one about the rotation axis (R) rotatable mass (31 1; 10; 1 1, 14) with respect to the rotation axis (R) is displaceable.

2. Adjusting device according to claim 1, characterized in that by means of the adjusting device (30) a distribution of a rotatable mass (31 1), an arrangement of the rotary body (10) and / or an arrangement of a portion (1 1, 14) of the rotary body ( 10) with respect to the axis of rotation (R) is variable, wherein preferably a main axis of inertia of the rotary body (10; 21; 22) to the rotation axis (R) is adaptable.

3. Adjusting device according to claim 1 or 2, characterized in that by means of the adjusting device (30) a rotatable mass (31 1; 10; 1 1, 14) along and / or at an angle with respect to the axis of rotation (R) is displaceable, and / or by means of the adjusting device (30) of the rotary body (10) or a portion (1 1, 14) of the rotary body (10) relative to the rotational axis (R) is at least partially displaced.

4. Adjusting device according to one of claims 1 to 3, characterized in that a mass (31 1; 10; 1 1, 14;

22) is displaceable in time after assembly of the rotary body (10; 21; 22).

5. Adjusting device according to one of claims 1 to 4, characterized in that one of the adjusting device (30) displaceable rotatable mass (31 1) is a balancing mass (31 1) by means of an adjusting mechanism (310) of the adjusting device (30 ) is translationally and / or rotationally movable with respect to the axis of rotation (R).

6. Adjusting device according to one of claims 1 to 5, characterized in that one of the adjusting device (30) movable rotatable mass (10) of the entire rotary body (10) or portions (1 1, 14) of the rotation onskörper body (10) are by means of a tilting mechanism (320) of the

Adjusting device (30) with respect to the rotation axis (R) is pivotable or are.

7. Adjusting device according to one of claims 1 to 6, characterized in that one of the adjusting device (30) displaceable rotatable mass (1 1, 14) is a portion (1 1, 14) of the rotary body (10) by means of a displacement mechanism (330) of the adjusting device (30) relative to another portion (14, 1 1) of the rotary body (10) is positionable.

8. Adjusting device according to one of claims 1 to 7, characterized in that the adjusting mechanism (310) has a threaded element (312) and / or a guide (313), by means of which or in which the balancing mass (31 1) with respect to the axis of rotation (R) is movable.

9. Adjusting device according to one of claims 1 to 8, characterized in that the adjusting mechanism (310) on a holder (314) is provided, which is preferably releasably mountable on the rotary body (10).

10. Adjusting device according to one of claims 1 to 9, characterized in that the adjusting mechanism (310) on the rotary body (10) mountable carrier (315) with an optionally opposite to the carrier (315) displaceable balancing mass (31 1) , wherein the carrier (315) is rigidly connected to the rotary body (10), or translationally and / or rotationally movable with respect to the rotary body (10) is providable.

1 1. Adjusting device according to one of claims 1 to 10, characterized in that the tilting mechanism (320) is a spring element (322) or an optionally curable, elastically and / or plastically deformable element (321), in particular a rubber (321) or elastomer element ( 321), by means of which the rotation body (10) is pivotable relative to the axis of rotation (R).

12. Adjusting device according to one of claims 1 to 11, characterized in that the displacement mechanism (330) has a threaded element (331) or a wedge (332), by means of which a portion (11, 14) of the rotary body (10) relative to another Section (14, 11) of the rotary body (10) is positionable.

13. rotary body, in particular fan (10) for a cooling fan of an internal combustion engine, or shaft (21) or rotor (22) of an electric motor (20), with an adjusting device (30) according to one of claims 1 to 12.