WO2022238364A1

WO2022238364A1 - Securing device for securing a support unit to a housing, support unit comprising a securing device, and method for producing a securing device

Info

Publication number: WO2022238364A1
Application number: PCT/EP2022/062559
Authority: WO
Inventors: Tobias Schrenk; Jochen Wittmann; Martin Botsch; Christoph Wieder; Andreas Hesler; Marcel Werner; Katja WILLACKER; Roland Lindwurm
Original assignee: Zf Friedrichshafen Ag
Priority date: 2021-05-11
Filing date: 2022-05-10
Publication date: 2022-11-17
Also published as: DE102021204737A1

Abstract

The invention relates to a securing device (110) for securing a support unit (105) to a housing (100), wherein the securing device (110) comprises at least one fastening element (305) and at least one elastomer element (320, 325) which is or can be situated between a support unit (105) and the housing (100) or between the fastening element (305) and the support unit (105).

Description

Fixing device for fixing a carrier unit to a housing, carrier unit with a fixing device and method for producing a fixing device

The present invention relates to a fixing device for fixing a carrier unit to a housing, a carrier unit with a fixing device and a method for producing a fixing device

In an electrical machine, a carrier unit for carrying the wiring or a connection panel can be fixed to a stator carrier or a housing by means of a screw sleeve and screw.

Against this background, the present invention provides an improved fixing device for fixing a carrier unit to a housing, an improved carrier unit with a fixing device and an improved method for producing a fixing device according to the main claims. Advantageous configurations result from the dependent claims and the following description.

With the fixing device presented here, vibration damping of the interconnection and tolerance compensation in the fixing interface can advantageously be achieved.

A fixing device for fixing a carrier unit to a housing is presented, the fixing device comprising at least one fastening element and at least one elastomer element. The elastomer element is arranged or can be arranged between a carrier unit and the housing or between the fastening element and the carrier unit. The fixing device can be used, for example, in an electrical machine, in which case the housing can correspond to a stator or a stator carrier. A carrier unit can be attached to the housing by means of the fixing device, which can be designed, for example, to carry an interconnection or switching elements, for example for applying a voltage to the current coils, whereby a rotation of a rotor arranged in the stator can be achieved. Since the fixing device comprises at least one fastener in which it can be a screw, for example, which can be passed through a part of the carrier unit and screwed into a part of the housing, for example. Between the fastening element and the carrier unit or also between the carrier unit and the housing, an elastomer element is arranged in the fastened state of the fixing device, which can be, for example, an elastic ring. Due to the elasticity of the elastomer element, tolerance compensation between the individual components can advantageously be effected. In addition, vibrations generated by the rotor during operation of the electrical machine can be compensated.

According to one embodiment, the elastomer element can be ring-shaped and additionally or alternatively disc-shaped. For example, the elastomeric element can be arranged or can be arranged in the shape of a ring around part of the fastening element, which can be shaped, for example, as a screw. In addition or as an alternative, the elastomer element can be shaped like a washer and can thus form an elastic layer that is thin compared to the adjacent components. Advantageously, as a result, both axial tolerance compensation through the deformation of the elastomer and radial tolerance compensation through the hole size of the ring-shaped elastomer element can be made possible during assembly.

According to a further embodiment, the fixing device can be arranged or can be arranged in and additionally or alternatively on a fastening base of the housing. The housing may, for example, comprise one or a plurality of mounting pedestals, which may, for example, be arranged slightly offset from a main form of the housing, which may, for example, be adapted to receive a stator. This offers the advantage that the fixing device can be attached to the housing with only a small amount of time and effort.

According to a further embodiment, the fastening element can be arranged or can be arranged at least partially in a receiving opening of the fastening base. The fastening element can, for example, be screwed into the receiving opening by means of a screw thread or in a form-fitting manner

2 to be put in. As a result, the carrier unit can advantageously be attached to the housing in a particularly stable manner and with little effort.

According to a further embodiment, the fastening element can be passed or can be passed through the elastomer element and additionally or alternatively the carrier unit. In the fastened state, the fastening element can, for example, be passed through a hole in the carrier unit and through the elastomer element, which is for example ring-shaped and rests against the carrier unit, in order to fasten the carrier unit to the housing. Advantageously, material, manufacturing costs and labor can be saved by this type of attachment.

According to a further embodiment, the fixing device can comprise a sleeve element which is arranged or can be arranged between the elastomer element and the carrier unit. For example, the sleeve element, which can also be referred to as an injection sleeve, can be ring-shaped, so that the fastening element can be passed through the sleeve element. In this case, for example, the elastomer element can be or will be connected to the sleeve element in a form-fitting manner and additionally or alternatively with a material connection. Advantageously, the sleeve element can be used to equalize the size between the fastening element and an opening in the carrier unit for the passage of the fastening element.

According to a further embodiment, the sleeve element can have a recess for receiving a part of the carrier unit. For example, the carrier unit can be fixed to the sleeve element, so that the sleeve element can be arranged between the carrier unit and the fastening element in the fastened state. For this purpose, the ring-shaped sleeve element, for example, can have a recess in the form of a circumferential groove or notch, for example on an outer edge of the sleeve element. The carrier unit, on the other hand, can be formed with an elevation that is compatible with the recess, as a result of which the carrier unit can advantageously be securely fixed to the sleeve element in a form-fitting manner.

3 According to a further embodiment, the fastening element can be carried out or can be carried out at least partially through the sleeve element. For example, in the fastened state, the fastening element can be passed through both the sleeve element and the elastomer element and part of the carrier unit. In this way, the carrier unit can advantageously be fixed to the housing in a particularly stable manner.

According to a further embodiment, the fixing device can comprise a further elastomer element which can be arranged or can be arranged between a carrier unit and the housing or between the fastening element and the carrier unit. The further elastomeric element can, for example, be designed congruently with the elastomeric element in terms of shape and material. In this case, in the fixed state, for example, the elastomer element can be arranged between the fastening element and the carrier unit and the further elastomer element can be arranged, for example, between the carrier unit and the housing. Advantageously, the vibration-damping property of the fixing device can be optimized as a result.

In addition, a carrier unit with a variant of the fixing device presented above is presented. The carrier unit, which can also be referred to as the overmolding of the wiring, can be, for example, an injection-molded unit for carrying electrical connections for operating an electrical machine. With a combination of the carrier unit and the fixing device, all the advantages presented above can advantageously be optimally implemented.

According to one embodiment, the carrier unit can comprise a further fixing device, wherein the fixing device and the further fixing device can be arranged at essentially opposite ends of the carrier unit. For example, the carrier unit can be essentially elongate and can be fixed to two different fastening bases of the housing by means of the fixing device and the additional fixing device. This has the advantage that the carrier unit can be attached to the housing in a particularly stable manner.

4 In addition, a method for producing a variant of the fixing device presented above is presented. The method comprises a step of providing the carrier unit, the fastening element, the elastomer element and the housing and a step of assembling the carrier unit, the fastening element, the elastomer element and the housing in such a way that the fixing device is produced.

A computer program product with program code is also advantageous, which can be stored on a machine-readable medium such as a semiconductor memory, a hard disk memory or an optical memory and is used to carry out the method according to one of the embodiments described above if the program is on a computer or a device.

The invention is explained in more detail by way of example with reference to the attached drawings. Show it:

1 shows a schematic representation of a housing with a carrier unit and a fixing device according to an exemplary embodiment;

FIG. 2 shows a schematic representation of a housing with a carrier unit and a fixing device according to an exemplary embodiment; FIG.

3 shows a schematic cross-sectional illustration of a fixing device according to an exemplary embodiment;

4 shows a schematic cross-sectional illustration of a fixing device according to an exemplary embodiment;

5 shows a schematic representation of a carrier unit according to an exemplary embodiment;

6 shows a schematic representation of a carrier unit with a fixing device and a further fixing device according to an exemplary embodiment;

7 shows a schematic representation of a carrier unit with a fixing device and a further fixing device according to an embodiment; and FIG. 8 shows a flowchart of a method for producing a fixing device according to an embodiment.

5 In the following description of preferred exemplary embodiments of the present invention, the same or similar reference symbols are used for the elements which are shown in the various figures and have a similar effect, with a repeated description of these elements being dispensed with.

Fig. 1 shows a schematic representation of a housing 100 with a Trägerein unit 105 and a fixing device 110 according to an embodiment. For example only, the housing 100 shown here is a stator of an electrical machine, which is designed to accommodate a rotor, which is not shown in FIG. 1 . In this exemplary embodiment, the carrier unit 105 is fixed to the housing 100 by means of the fixing device 110 and a further fixing device 115 . For this purpose, the housing 100 has, merely by way of example, a fastening base 120 for accommodating the fixing device 110 and a further fastening base 125 for accommodating the further fixing device 115. The carrier unit 105 is designed, merely by way of example, to carry switching elements 130, by means of which in the operational state the electrical machine's current flow can be controlled.

Fig. 2 shows a schematic representation of a housing 100 with a Trägerein unit 105 and a fixing device 110 according to an embodiment. The housing 100 shown here, the carrier unit 105 and the fixing device 110 correspond to or are similar to the housing, the carrier unit and the fixing device described in the previous figure, with the difference that in this exemplary embodiment, in addition to the housing 100, a so-called boundary contour 200 of the electrical winding of the stator is drawn. The boundary contour 200 delimits the outer surface of the winding space of the electrical machine.

FIG. 3 shows a schematic cross-sectional representation of a fixing device 110 according to an embodiment. The fixing device 110 shown here corresponds to or is similar to the fixing device described above.

The fixing device 110 is designed to fix a carrier unit 105 to a housing 100 Ge. In this exemplary embodiment, the housing 100 has a fastening base 120 for this purpose, which has a receiving opening merely by way of example

6 300 for receiving a fastener 305 of the fixing device 110 summarizes. In this exemplary embodiment, the fastening element 305 is formed only by way of example as a fixing screw which is passed through the carrier unit with a screw shank 310 and partially engages in the receiving opening 300 of the fastening base 120 in order to fix the carrier device 105 to the Ge housing. To compensate for tolerances and to dampen vibrations, the fixing device 110 also has an elastomer element 320 which, in this exemplary embodiment, is both ring-shaped and disk-shaped and encloses part of the screw shank 310 . In this case, the elastomer element 320 is arranged between the housing 100 and the carrier unit 105 merely by way of example. In another exemplary embodiment, the elastomer element can also be arranged between the carrier unit 105 and the fastening element 305 . In this exemplary embodiment, on the other hand, a further elastomer element 325 is arranged between the carrier unit 105 and the fastening element 305 and is designed congruently with the elastomer element 320 . Like the elastomer element 320, the further elastomer element 325 also encloses the screw shank 310 of the fastening element 305, the further elastomer element 325 being arranged at an upper end of the fastening element 305 or adjacent to the screw head 327. In this exemplary embodiment, the elastomer element 320 and the further elastomer element 325 are arranged on opposite sides of a sleeve element 330 which also encloses the screw shank 310 in a ring-shaped manner and on which the carrier unit 105 is arranged merely by way of example. To accommodate the carrier unit 105, the sleeve element 330 has a recess 335, only by way of example, into which the carrier unit 105 engages in a form-fitting manner, only by way of example. In another exemplary embodiment, the carrier unit can additionally or alternatively be cohesively connected to the sleeve element. In other words, in this exemplary embodiment, fastening element 305 is guided through further elastomer element 325, through sleeve element 330 with carrier unit 105 arranged on sleeve element 330, and through elastomer element 320 into receiving opening 300, in order to fix carrier unit 105 to housing 100 .

7 FIG. 4 shows a schematic cross-sectional representation of a fixing device 110 according to an embodiment. The fixing device 110 shown here corresponds to or is similar to the fixing device described in the previous figures. In this exemplary embodiment, a fastening element 305 of the fixing device 110 is guided, merely by way of example, through a further elastomer element 325, through a sleeve element 330 to which the carrier unit 105 is fastened, and through an elastomer element 320 into a receiving opening 300 of a fastening base 120 of the housing.

FIG. 5 shows a schematic representation of a carrier unit 105 according to an exemplary embodiment. The carrier unit 105 shown here corresponds or is similar to the carrier unit described in the previous figures. Merely by way of example, the carrier unit 105 in this exemplary embodiment comprises a first fixing opening 505 arranged at a first end 500 of the carrier unit 105 for fixing the carrier unit 105 to a housing, as has been described in the preceding figures. A sleeve element 330 is arranged in the first fixing opening 505, which is shaped to enclose a fastening element, as was described in the previous FIGS. 3 and 4, purely by way of example. In this exemplary embodiment, the carrier unit 105 also has a second end 510 which, by way of example, is arranged opposite the first end 500 . The second end 510 comprises a second fixing opening 515 congruent to the first end 500, in which a further sleeve element 520 for receiving a further fastening element of a further fixing device is arranged.

FIG. 6 shows a schematic representation of a carrier unit 105 with a fixing device 110 and a further fixing device 115 according to an exemplary embodiment. The carrier unit 105 shown here corresponds or is similar to the carrier unit described in the preceding figures. In this case, the carrier unit 105 is fixed to a housing 100 in this exemplary embodiment by means of a fixing device 110 and a further fixing device 115 . The fixing device 110 corresponds to or is similar to the fixing device described in the previous figures and comprises a fastening element 305, an elastomeric element

8th 320, and only by way of example, another elastomer element 325 and a sleeve element 330 to which the carrier unit 105 is attached. In this exemplary embodiment, the further fixing device 115 is formed congruently with the fixing device 110, with a further fastening element 600 engaging in a further fastening base 125 merely by way of example.

FIG. 7 shows a schematic representation of a carrier unit 105 with a fixing device 110 and a further fixing device 115 according to an exemplary embodiment. The carrier unit 105 shown here corresponds or is similar to the carrier unit described in the previous figures, and the fixing device 110 shown here and the additional fixing device 115 correspond to the fixing device described in the previous figures and the additional fixing device described in FIGS. In this exemplary embodiment, the boundary contour 200 delimiting the winding space can again be seen on the carrier unit 105 .

FIG. 8 shows a flow chart of a method 800 for manufacturing a fuser device according to an embodiment. The method 800 includes a step 805 of providing the carrier unit, the fastening element, the elastomer element and the housing and a step 810 of assembling the carrier unit, the fastening element, the elastomer element and the housing in such a way that the fixing device is produced.

The exemplary embodiments described and shown in the figures are selected only by way of example. Different exemplary embodiments can be combined with one another completely or in relation to individual features. An exemplary embodiment can also be supplemented by features of a further exemplary embodiment.

Furthermore, method steps according to the invention can be repeated and carried out in a different order than that described.

If an exemplary embodiment includes an "and/or" link between a first feature and a second feature, this can be read in such a way that the

9 Embodiment according to one embodiment has both the first feature and the second feature and according to a further embodiment either only the first feature or only the second feature.

10 Reference numbers housing carrier unit fixing device further fixing device fastening base further fastening base interconnection elements boundary contour of the winding receiving opening fastening element screw shank elastomer element further elastomer element screw head sleeve element recess first end of the carrier unit first fixing opening second end of the carrier unit second fixing opening further sleeve element further fastening element method step of providing step of assembly

1 1

Claims

patent claims

1 . Fixing device (110) for fixing a carrier unit (105) to a housing (100), the fixing device (110) comprising at least one fastening element (305) and at least one elastomer element (320, 325) which is located between a carrier unit (105) and is arranged or can be arranged on the housing (100) or between the fastening element (305) and the carrier unit (105).

2. Fixing device (110) according to claim 1, wherein the elastomer element (320,

325) is ring-shaped and/or disc-shaped.

3. Fixing device (110) according to one of the preceding claims, wherein the fixing device (110) is arranged or can be arranged in and/or on a fastening base (120) of the housing (100).

4. Fixing device (110) according to claim 3, wherein the fastening element (305) is arranged or can be arranged at least partially in a receiving opening (300) of the fastening base (120).

5. Fixing device (110) according to any one of the preceding claims, wherein the fastening element (305) through the elastomer element (320, 325) and / or the Trä gereinheit (105) carried out or can be carried out.

6. Fixing device (110) according to one of the preceding claims, with a sleeve element (330) which is arranged or can be arranged between the elastomer element (320, 325) and the carrier unit (105).

7. Fixing device (110) according to claim 6, wherein the sleeve element (330) has a recess (335) for receiving a part of the carrier unit (105).

8. Fixing device (110) according to one of claims 6 or 7, wherein the fastening element (305) at least partially through the sleeve element (330) Runaway leads or can be carried out.

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9. Fixing device (110) according to one of the preceding claims, with a further elastomer element (325) which is arranged or can be arranged between a carrier unit (105) and the housing (100) or between the fastening element (305) and the carrier unit (105). .

10. carrier unit (105) with a fixing device (110) according to any preceding claim.

11 . Carrier unit (105) according to claim 9, with a further fixing device

(115), wherein the fixing device (110) and the further fixing device (110) are arranged at essentially opposite ends (500, 510) of the carrier unit (105).

12. Method (800) for producing a fixing device (110) according to one of the preceding claims 1 to 9, wherein the method (800) comprises the following steps (805, 810):

providing (805) the carrier unit (105), the fastening element (305), the elastomeric element (320, 325) and the housing (100); and

Assembling (810) the carrier unit (105), the fastening element (305), the elastomer element (320, 325) and the housing (100) in such a way that the fixing device (110) is produced.

13. Computer program that is set up to execute and/or control the steps (805, 810) of the method (800) according to claim 12.

14. Machine-readable storage medium on which the computer program according to claim 13 is stored.

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