The invention relates to a stator end disk for a commutator motor, in particular a universal motor, in particular for use in a domestic appliance, comprising a connecting terminal which has connecting elements for connecting stator winding wires and a female connector with contact elements for receiving and electrically connecting an external motor connector, whereby each of the connecting elements is connected in each case to an associated contact element so as to be electrically conducting, and further relates to a commutator motor having such a stator end disk.
Such a stator end disk is already known from DE 43 21 540 C2. An electric motor with a stator end disk is shown there which has two connection housings with chambers, which are arranged diametrically opposite one another at the outer edge of the free front surface of the stator end disk and into which the ends of the windings are introduced and secured. However, such an electric motor has the disadvantage that at least two motor connectors are required for the external connection of the stator coils and additional external connections are required for further internal, electrical components of the electric motor.
The object of the present invention is to provide a favorably priced commutator motor, in particular a universal motor, in particular for use in a domestic appliance.
The aforementioned object is achieved by a stator end disk having the features described in claim 1. Advantageous and also preferred embodiments of the invention are the subject matter of the dependent claims.
With regard to a stator end disk of the type described in the introduction, according to the invention only one connecting terminal is arranged on the stator end disk, whereby in order to electrically connect at least one further internal, electrical component of the commutator motor at least one further contact element assigned to the component is arranged in the female connector. This component can be a carbon brush and/or a temperature-sensing device and/or a tachometer. In this manner, the number of external connectors required is reduced, as a result of which savings can be made in respect of these components.
According to a preferred embodiment, the necessary contact elements for all the internal, electrical components of the commutator motor are provided in the female connector. In this manner, only a single connecting terminal is required for the external connection both of the stator coils and also of all further internal, electrical components of the collector motor. By preference, the external motor connector is a multipoint connector and the female connector is implemented in order to receive the multipoint connector such that only a single external connector plug can be used in order to connect both the stator coils and also the internal, electrical components. It is moreover possible to implement different motor variants with the same stator end disk by employing a different assignment of the contact elements. Since no different stator end disks need to be held in stock for the different motor variants, the logistical effort for manufacturing different motor variants is reduced, as a result of which the overall manufacturing costs can be lowered.
By preference, in order to connect the component with its assigned contact element the connecting terminal has a connecting element for connecting a connecting line. Through the use of a connecting line, such as a single wire or a braided wire line for example, the component can be easily connected to the connecting element. If a releasable connection is provided, such as a plug-in or soldered connection for example, then the component can be easily replaced in the event of a fault or malfunction. Varied usage of the connecting elements is moreover possible for different motor variants.
In an alternative embodiment, in order to connect the component with its assigned contact element a connecting line is incorporated into the stator end disk, in particular it is injected. This connecting line is preferably implemented in the form of a stamped grid. In this manner, a connection of the internal component is not bound to the position of possible connecting elements of the connecting terminal because the component can be connected to the injected connecting line or to the stamped grid at a different point of the stator end disk.
The stator end disk preferably has a receiving facility for a temperature-sensing device as a thermo switch in the armature circuit and/or a mounting for a temperature-sensing device as a temperature sensor in the air gap between rotor and stator. These two possibilities are preferably already provided in the case of the universally deployable stator end disk and a corresponding mounting or receiving facility is implemented such that the use of the same stator end disk is possible both for motor variants having a thermo switch in the armature circuit and also for motor variants having a temperature sensor.
According to a preferred embodiment, the connecting terminal is integrally formed on the stator end disk. In particular, both are manufactured from plastic, whereby the connecting terminal is preferably integrally formed in one piece on the stator end disk. As a result, no assembly steps are required in order to connect the connecting terminal with the stator end disk. In addition, the stator end disk can be produced together with the connecting terminal in a particularly simple manner by means of an injection molding process.
In a preferred development of the invention, winding support parts for mounting the pole coils are integrally formed in one piece on the stator end disk at the positions of the stator poles. In this manner, the positions of the stator windings can already be defined with respect to the motor axis during winding in the winding machine and secured against slippage in the radial direction, with the result that a subsequent manual fixing of the stator windings in the area of the end windings by means of cable clips for example can be dispensed with.
The connecting elements of the connecting terminal can be implemented differently. In particular, at least one of the connecting elements is implemented as a flat connector or insulation displacement connection or weld hook. By preference, the connecting elements for connecting stator winding wires are implemented as weld hooks and/or the connecting element for connecting the component is implemented as a flat connector. In this manner, the stator winding wires, in other words both the coil ends and also possible winding tappings, can already be defined in the winding machine on the weld hooks and then automatically welded to the weld hooks. The internal, electrical component of the commutator motor is connected by means of one or more plug-in connections to the corresponding flat connectors of the connecting terminal. This can be done either manually or also automatically. By virtue of the releasable plug-in connection, the component can be replaced if necessary.
According to a preferred embodiment, each of the connecting elements is implemented with its associated contact element in each case in the form of a metallic insert. This has the advantage that the connecting terminal of the stator end disk can be equipped according to the motor variant with a different number of, or differently formed, inserts. The insert is preferably implemented in such a manner that the connecting element is connected in the form of a connecting lug with its associated contact element in the form of a contact pin by way of a metallic bridge. In particular, the insert is formed from sheet metal, as a result of which it can be manufactured particularly simply, for example by stamping and bending.
The inserts can be incorporated into the connecting terminal, in particular injected, as a result of which automatic equipping of the connecting terminal with the inserts is possible. By using an injection molding process, the stator end disk can be produced with the connecting terminal integrally formed and already equipped with the inserts in a single work step.
By preference, the connecting terminal is implemented in two parts for the purpose of equipping with the inserts, and the two parts can be locked together by means of locking elements and/or stuck together. In this manner, a different equipment of the connecting terminal with a different number of, or differently formed, inserts for different motor variants can be particularly easily achieved. In particular, receiving facilities of the connecting terminal for the inserts can also remain unequipped if these are not required for the corresponding motor variant.
In a preferred development of the invention, the contact element extends with respect to the stator end disk both to the side of the connecting element and also to the side facing away from the connecting element. By this means it is possible to effect the external motor connection either from the A side or the B side of the commutator motor, with the result that the external motor connection can be made from the more favorable of the two sides depending on the installation conditions of the commutator motor in a device. In particular, a female connector providing an alternative receiving facility for the external motor connector is implemented on the connecting terminal in each case both on the front surface of the stator end disk facing away from the laminated stator core and also on the side of the stator end disk facing the laminated stator core. As a result, the motor connector can be inserted in a simple manner into the more favorable of the two possible positions. In particular, at least one of the female connectors can be closed by means of a cover lid. By preference, locking elements are integrally formed on the female connectors so as to engage with the cover lid in order to seal the unused female connector or the cover lid sits in a press fit on the female connector unused in each case in such a manner that the contact elements of the unused female connector are protected by the cover lid against unintentional contacting.
The stator end disk according to the invention can be implemented such that the contours of its contact surface bearing on the laminated stator core are formed to match as closely as possible the laminations of the front surface of the laminated stator coil, such that the receiving space for the rotor is encompassed in a ring shape by the stator end disk. In contrast to this, in accordance with a simplified embodiment the stator end disk can also be implemented in such a manner that it solely covers a partial area of the front surface of the laminated stator coil. In particular, the stator end disk can also be solely limited to the part of the laminated stator coil passing in the area of an interpolar gap.
The stator end disk according to the invention is used in the case of commutator motors, in particular in the case of universal motors or series-wound motors for domestic appliances, such as for example in the case of drive motors for washing machines or clothes dryers or in the case of fan motors for vacuum cleaners.
It should be noted that the features of the subclaims can be combined with one another in any desired manner without deviating from the inventive concept and with the features of the independent claim or claims.
Embodiments of the invention will be described in detail in the following with reference the drawings.
a,2b show an exploded view of the stator end disk according to
Before the drawings are described in detail, it should be noted that elements or individual parts of the stator end disk and of the commutator motor which correspond to one another or are the same are identified by the same reference characters in all the figures.
The B-side stator end disk 10 according to
Furthermore, a receiving facility 30 for a thermo switch 31 in the armature circuit is implemented on the B-side stator end disk 10. In order to also enable a temperature sensor to be arranged in the air gap between laminated stator core 2 and rotor 47 for alternative motor variants, mountings 32 for the temperature sensor or for the latter's connecting wires are additionally formed on the B-side stator end disk 10.
In the B-side stator end disk 10 shown in
Other connections for the coil wires of the first pole coil 5 and of the second pole coil 6 are however also possible. For example, in a second embodiment the coil tapping 63 of the second pole coil 6 is divided up such that the second pole coil 63 has a second coil beginning 631 and a second coil end 632. According to this second embodiment, the coil beginning 51 of the first pole coil 5 is now defined together with the second coil beginning 631 of the second pole coil 6 on the first weld hook 38 and welded to the latter. Furthermore, according to this second embodiment, the coil end 52 of the first pole coil 5 is defined with the second coil end 632 of the second pole coil 6 on the second weld hook 39 and welded to the latter. Finally, according to the second embodiment, the coil beginning 61 of the second pole coil 6, the coil end 62 of the second pole coil 6 and the coil tapping 53 of the first pole coil 5 are defined on the third weld hook 40 and welded to the latter. It is also possible that a further fourth weld hook 41 is additionally integrally formed on the connecting lug 24 with the third weld hook. It is thus also possible to divide up the coil tapping 53 of the first pole coil 5 such that the first pole coil 5 likewise has a second coil beginning 531 and a second coil end 532. In this manner, the coil beginning 61 of the second pole coil 6 can then be defined with the second coil end 532 of the first pole coil 5 on the third weld hook 40 and welded. Furthermore, the coil end 62 of the second pole coil 6 can then be defined with the second coil beginning 531 of the first pole coil 5 on the fourth weld hook 41 and welded. The coil beginnings 51, 61, the coil ends 52, 62 and the coil tappings 53, 531, 531, 63, 631, 632 can also be combined differently with one another. An alternative motor variant without coil tappings 53, 63 is also possible. Furthermore, the inserts 23 can be arranged with the weld hooks 38, 39, 40 and 41 at different positions in the receiving facilities 22 of the connecting terminal 11.
In order to connect the tachometer 13, two connecting lugs 24 in the form of a first flat connector 42 and a second flat connector 43 are implemented in the connecting terminal 11. In order to connect the first connecting line 33 of the thermo switch 31—as already mentioned above—the flat connector 35 is provided. In order to connect the first carbon brush of the first carbon brush holder 14, a further connecting lug 24 is implemented as a flat connector 44 in the connecting terminal 11. With regard to a motor variant without a thermo switch 31, the second carbon brush of the second carbon brush holder 15 can be connected directly to the flat connector 35. With regard to a further motor variant in which a temperature sensor (not shown) is fitted into the mountings 32 instead of the thermo switch 31, in order to connect this temperature sensor two further connecting lugs 24 are implemented in the connecting terminal 11 in the form of a first flat connector 45 and a second flat connector 46. In this situation also, by analogy with the weld hooks 38, 39, 40, 41, the assignment of the flat connectors 35, 42, 43, 44, 45, 46 or their position in the receiving facilities 22 of the connecting terminal 11 can be varied. Furthermore, it is also possible to implement the connecting elements of the connecting terminal 11 as soldering tags or as insulation displacement connections instead of as flat connectors 35, 42, 43, 44, 45, 46 or as connecting lugs with weld hooks 38, 39, 40, 41.
In contrast to the embodiment according to
1 Commutator motor
2 Laminated stator core
3 First stator pole
4 Second stator pole
5 First pole coil
6 Second pole coil
7 Shaped insulation part
8 Shaped insulation part
9 A-side stator end disk
10 B-side stator end disk
11 Connecting terminal
12 B-side bearing plate
13 Tachometer
14 First carbon brush holder
15 Second carbon brush holder
16 First winding support part
17 Second winding support part
18 First part of the connecting terminal
19 Detent lug
20 Second part of the connecting terminal
21 Detent eye
22 Receiving facility for insert
23 Insert
24 Connecting lug
25 Contact pin
26 Bridge
27 A-side female connector
28 B-side female connector
29 Cover lid
30 Receiving facility for thermo switch
31 Thermo switch
32 Mounting for temperature sensor
33 First connecting line
34 First flat connector sleeve
35 Flat connector for connecting the thermo switch or the second carbon brush
36 Second connecting line
37 Second flat connector sleeve
38 First weld hook
39 Second weld hook
40 Third weld hook
41 Fourth weld hook
42 First flat connector for connecting the tachometer
43 Second flat connector for connecting the tachometer
44 Flat connector for connecting the first carbon brush
45 First flat connector for connecting the temperature sensor
46 Second flat connector for connecting the temperature sensor
47 Rotor
48 External motor connector
51 Coil beginning of the first pole coil
52 Coil end of the first pole coil
53 Coil tapping of the first pole coil
531 Second coil beginning of the first pole coil
532 Second coil end of the first pole coil
61 Coil beginning of the second pole coil
62 Coil end of the second pole coil
63 Coil tapping of the second pole coil
631 Second coil beginning of the second pole coil
632 Second coil end of the second pole coil
64 Chamber for insulation displacement contact
65 Insulation displacement contact
66 Plug contact
Number | Date | Country | Kind |
---|---|---|---|
10 2005 060 358.0 | Dec 2005 | DE | national |
20 2006 007 808.8 | May 2006 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/EP2006/069371 | 12/6/2006 | WO | 00 | 9/16/2008 |