U.S. patent application number 10/083736 was filed with the patent office on 2002-07-11 for process for fixing a rotor winding.
Invention is credited to Aesche, Helmut, Hammer, Uwe, Kiefer, Martin, Maldener, Klaus.
Application Number | 20020088108 10/083736 |
Document ID | / |
Family ID | 7858966 |
Filed Date | 2002-07-11 |
United States Patent
Application |
20020088108 |
Kind Code |
A1 |
Maldener, Klaus ; et
al. |
July 11, 2002 |
Process for fixing a rotor winding
Abstract
In a process for fixing a rotor winding (15), which is hooked to
connection lugs (122) of commutator lamellas (121) of a commutator
(12) in the vicinity between the connection lugs (122) and winding
heads (151) that are embodied on the end face of the rotor body
(11), in order to simplify the process, a shrink sleeve (16) is
placed over the commutator (12) of the completed rotor (10) and is
slid onto the winding heads (151) until the connection lugs (122)
and the connection wires (152) of the rotor winding (15) that
extend to the connection lugs (122) are covered. The mechanically
fixed shrink sleeve (16) is homogeneously heated with hot air while
the rotor (10) rotates so that after cooling, it shrinks onto the
connection lugs (122) and connection wires (152) as well as onto
parts of the winding heads (151).
Inventors: |
Maldener, Klaus; (Lauf,
DE) ; Kiefer, Martin; (Oberkirch, DE) ;
Aesche, Helmut; (Ottersweier, DE) ; Hammer, Uwe;
(Markgroeningen, DE) |
Correspondence
Address: |
Ronald E. Greigg
GREIGG & GREIGG, P.L.L.C
1423 Powhatan Street, Unit One
Alexandria
VA
22314
US
|
Family ID: |
7858966 |
Appl. No.: |
10/083736 |
Filed: |
February 27, 2002 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10083736 |
Feb 27, 2002 |
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09403723 |
Dec 14, 1999 |
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6370760 |
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Current U.S.
Class: |
29/596 ;
264/272.2; 29/598 |
Current CPC
Class: |
H01R 39/34 20130101;
Y10T 29/49011 20150115; Y10T 29/49073 20150115; Y10T 29/49009
20150115; H01R 4/72 20130101; H02K 13/04 20130101; Y10T 29/49012
20150115 |
Class at
Publication: |
29/596 ; 29/598;
264/272.2 |
International
Class: |
H02K 015/14; B29C
031/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 26, 1998 |
DE |
1 98 08 069.7 |
Claims
1. A process for fixing a rotor winding (15), which is hooked to
connection lugs (122) of commutator lamellas (121) of a commutator
(12) and is contained in a rotor body (11) that is non-rotatably
supported together with the commutator (12) on a common rotor shaft
(13), in the vicinity between the connection lugs (122) and winding
heads (151) that are embodied on the end face of the rotor body
(11), characterized in that a shrink sleeve (16) is placed over the
commutator (12) of the completed rotor (10) with the rotor body
(11), commutator (12), and rotor winding (15), and is slid onto the
winding heads (151) until the connection lugs (122) and the
connection wires (152) of the rotor winding (15) that extend to the
connection lugs (122) are covered, and that the shrink sleeve (16)
is mechanically fixed and is homogeneously heated with hot air
while the rotor (10) rotates.
2. The process according to claim 1, characterized in that the
shrink sleeve (16) is cut to length from an endless tube before
being slid over.
3. The process according to claim 1, characterized in that the
shrinkage sleeve is produced as an individual sleeve of a
predetermined length.
4. The process according to one of claims 1 through 3,
characterized in that a hot air blower is used to produce the hot
air.
Description
PRIOR ART
[0001] The invention is based on a process for fixing a rotor
winding, which is hooked to connection lugs or hooks of commutator
lamellas of a commutator and is contained in a rotor body that is
non-rotatably supported on a common rotor shaft with the
commutator, in the vicinity between the connection lugs or hooks
and winding heads that are embodied on the end face of the rotor
head.
[0002] With rotors for commutator or collector machines, the
individual, insulated winding wires of the rotor or armature
winding are inserted into axial grooves disposed offset from one
another on the circumference of the rotor body, which is embodied
as a laminated stack of sheets, wherein the end faces of the
winding wires, which are wound into separate winding coils,
protrude as a so-called winding heads from the two end faces of the
rotor body. The separate connection wires to the winding coils are
conveyed to connection lugs embodied on the separate commutator
lamellas and are attached there by means of winding around the
connection lugs using different winding techniques and by bending
the connection lugs while simultaneously carrying out an ultrasonic
welding. An exemplary embodiment for a so-called hook collector of
this kind and for the embodiment of the so-called hooking technique
when fixing the winding connection wires to the collector hooks is
described in WO 90/04864 A1 (FIG. 11).
[0003] So that no vibrational fractures are produced in the rotor
winding during operation and in particular during the usually
required hard vibration testing of the rotor, the region of the
rotor winding that includes the connection winding wires is fixed
between the connection lugs in a different manner, e.g. by means of
a molded mass or by means of tying with or without enameled
wire.
ADVANTAGES OF THE INVENTION
[0004] The process according to the invention for fixing the rotor
winding in the region between the connection lugs and the winding
heads of the rotor winding, with the features of claim 1, has the
advantage that on the one hand, existing manufacturing processes
and techniques can be used and on the other hand, only one
additional part is required which can be shrink-fitted with a low
degree of stress on the rotor and the rotor winding.
[0005] Advantageous improvements and updates of the process
disclosed in claim 1 are possible by means of the measures taken in
the remaining claims.
DRAWINGS
[0006] The process according to the invention is explained in
detail in the subsequent description in conjunction with an
exemplary embodiment of a rotor for a commutator machine shown in
the drawings.
[0007] FIG. 1 is a perspective detail view of a completed rotor
with a rotor shaft, rotor body, rotor winding, and commutator, as
well as a shrink sleeve to be slid onto the commutator, FIG. 2 is a
perspective representation of the rotor in FIG. 1 after the shrink
sleeve has been slid on.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
[0008] The armature or rotor 10, which is depicted in perspective
fashion in FIGS. 1 and 2 and is for a commutator or collector
machine, has a rotor body 11 that is embodied as a laminated stack
of sheets and a collector or commutator 12, which are both
non-rotatably supported on a common rotor shaft 13. The rotor body
11 has axial grooves 14 disposed distributed over the
circumference, into which an armature or rotor winding 15 is wound.
The separate, insulated winding wires of the rotor winding 15 are
thereby inserted into the axial grooves 14 in a number of locations
and constitute separate winding coils that are connected in an
electrically conductive manner to the individual commutator
lamellas 121 of the commutator 12. The commutator lamellas 121 are
disposed in the usual fashion next to one another on the
circumference of an insulation material body 123 non-rotatably
supported on the rotor shaft 13, with an insulating gap between
them, and extend over the entire axial length of the insulation
material body.
[0009] For the electrical connection of the rotor winding 15 to the
commutator 12, the individual commutator lamellas 121 are provided
with connection lugs 122, also called collector hooks, which are
preferably embodied as one piece. On the end face of the commutator
lamellas 121 oriented toward the rotor body 11, the connection lugs
122 are angled away from this rotor body 11 and are bent over in
the direction toward the commutator lamellas 121 so that the
individual connection lugs 122 enclose a small, acute angle with
their commutator lamellas 121. Connection wires 152 of the rotor
winding 15 leading from the individual winding coils of the rotor
winding 15 to the connection lugs 121 are guided around the
connection wires 152 in different hooking techniques, wherein they
can wind around the respective connection lugs 122 once or a number
of times and can be mechanically and electrically fastened to the
connection lugs 122, preferably by means of an ultrasonic welding
process.
[0010] The connection wires 152 extending in the region between the
winding heads 151 and the connection lugs 122 must be fixed so that
no winding fractures occur in the rotor winding 15 during operation
and in particular, during the usually required hard vibration
testing for commutator machines used in vehicle construction.
Moreover, this fixing counteracts centrifugal forces at higher
speeds. In order to fix this winding region of the rotor winding
15, in the completed rotor 10 that is described above and shown in
FIG. 1, a shrink sleeve 16 is placed over the commutator 12 and
slid onto the winding heads 151 of the rotor winding 15 until the
connection lugs 122 and the connection wires 152 extending from the
connection lugs 122 to the winding heads 151 are completely
covered. The shrink sleeve 16 is mechanically fixed in its
position, the rotor 10 is set into rotation, and the shrink sleeve
16 is homogeneously heated with hot air. Preferably, a hot air jet
produced by means of a hot air blower is used for the heating. As a
result of the homogenous heating, the shrink sleeve 16 shrinks and
comes to rest against the connection wires 152 in the region of the
winding heads 151 and connection lugs 122. Then, the shrink sleeve
16 cools and hardens. The connection wires 152 are therefore
mechanically fixed and secured against centrifugal forces.
[0011] In the exemplary embodiment of FIG. 1, the shrink sleeve 16
is produced as an individual sleeve of a predetermined length.
However, the shrink sleeve 16 can also be cut to length from an
endless tube with appropriate dimensions. The shrink sleeve 16 is
comprised for example of VITON VS 15105-Bn.
* * * * *