Note: Descriptions are shown in the official language in which they were submitted.
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FIELD OF INVENTION
Thls inventlon relates to linear inductlon motors.
In particular, this lnvention relates to improvements in the
mounting structure for mountlng the side covers Or the primary
member of a single-sided linear induction motor.
PRIOR ART
In order to protect the nose portions Or the coils whlch
pro~ect outwardly from o~posite sides Or the core of the primary
B &ry member of a llnear induction motor, side covers are provided.
Cons~derable di~ficulty has been encountered in attemptlng to
mount the side covers ln a manner such that they are malntained
in a plane above the plane o~ the lower faces of the wedge
members of the core. It is important to ensure that the covers
do not pro~ect below the plane of the lower surfaces Or the
wedge members in order to avoid a situatlon wherein the side
covers may make contact with thes~xn~ary-member of the lnduction
motor in association with which the primary member is used.
From time to time the lowermost surface Or the primary member
may accidentally come in contact with the uppermost face Or the
secondarymember and ir the side covers pro~ect below the lower-
most face Or the primary member, the side covers may damage the
secondary member over a substantial length of the secondary
member. For this reason it is important to ensure that the lower
surfaces Or the wedge members form the lowermost surrace of the
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sooondary member.
SUMMARY OF INVENTION
The present invention overcomes the difriculty Or
mounting the side covers by provlding small mounting brackets at
spaced intervals along the length Or the oppositely dlsposed side
edges Or the core member to support the inner edges Or the slde
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1~60934
covers in a plane above the plane of the lower surface of the
wedge members.
According to one aspect of the present invention,
there is provided in a primary member of a single-sided linear
induction motor having, a frame, a core member having a
plurality of coil assemblies mounted in the coil slots thereof
and secured therein by means of a plurality of wedge members,
each of the wedge members having an upper face directed towards
a coil assembly and a lower face disposed below the core member,
the coil assemblies having nose portions projecting laterally
from opposite sides of the core member, a pair of side covers
adapted to extend over the nose portions of the coils, each
side cover member having inner and outer longitudinally extending
side edges, the outer side edge of each side cover member being
secured to the frame outwardly from the coil noses on opposite
sides of the core a substantial distance above the lower face
of the wedge members, the improvement of; a plurality of cover
mounting brackets located at longitudinally spaced intervals
along the length of said core, each of said cover mounting
brackets comprising a main body portion and a head portion at
one end of the main body portion, the head portion projecting
laterally from the main body portion, the other end of the main
body portion being supported by a wedge member with the head
portion thereof disposed above the lower face of the wedge member
and spaced below the lower face of its associated coil, the inner
edges of each of said side covers being downwardly curved
and notched at longitudinally spaced intervals corres-
ponding to the longitudinal spacing of the mounting
- brackets so as to extend inwardly and downwardly over the
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laterally extendlng head portions Or the mounting brackets on
opposlte sides o~ the main bcdy portions ~o be supported by the
head portlon in a plane above the plane Or the lower face Or the
wedge membGrs.
The lnvention will be more clearly understood arter
reference to the following detailed speci~ication read in con-
~unction with the drawings, wherein
Fig. 1 is a pictorial vlew of the underside of a
primary member Or a single-sided linear induction motor;
Fig. 2 is a sectional view along the line 2-2 Or Fig. l;
Fig. 3 ls a sectlonal view along the line 3-3 Or Fig. l;
Fig. 4 is an enlarged detailed vlew Or a mounting bracket
according to an embodiment of the present invention, and
Fig. 5 is an enlarged detalled view lllustrating the
manner in whlch the lnner edge Or the slde covers is supported
on the mountlng bracket.
Wlth reference to Flg. 1 of the drawings, the reference
numeral 10 refers generally to a primary member Or a slngle-
sided linear induction motor. The motor has a frame generally
identified by the reference numeral 12. The rrame includes a
pair Or oppositely disposed end wall members 14 between which a
pair Or longltudinally extending L-shaped beams 16 (Fig. 2) e~- -
tend. A second palr Or L-shaped brackets 18 extend longitudlnally
Or the slde edges Or the rrame and are located at opposite sides
Or the rrame a substantlal distance above the lower surface Or
the core 20. The core 20 is mounted between the beams 16 by a
plurality o~ bolts 22 which are located at longitudinally spaced
lntervals along the length Or the core. The core 20 is formed
with a plurality Or coil mountlng slots 24 e~tending trans-
versely thereof. A plurality Or coils ~6 are mounted ln the
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core slots 24. As shown in Fig. 3 of the drawings, two coilmembers are arranged one on top of the other in the majority
of the slots 24 and a spacer member 28 is located in the slots
24 which do not house two coil mem~ers. The coil assem~ly
which is located within each slot 24 may, therefore, consist of
two side lengths of coil arranged one above the other or one
side length of coil and a spacer 28.
A pair of grooves 30 are formed in the oppositely dis-
posed side walls of the slots 24 adjacent the lower end thereof.
A wedge member 32 (Fig. 4) i8 adapted to fit in a close
fitting relationship within the lower end of each slot 24 and is
provided with a pair of oppositely disposed shoulders 34 which
fit within the grooves 30 formed in the side walls of the slot
24. The wedge members 32 are preferably made from an insulating
material such as a plastics material. A shallow groove 36 is
formed in the upper face of selected wedge members 32a and ex-
tends inwardly from opposite ends thereof.
A mounting bracker generally identified by the reference
numeral 40 is located in each of the grooves 36. As shown in
Fig. 1 of the drawings, six mounting brackets are provided, three
on either side of the core 20. As shown in Figs. 4 and 5 of the
drawings, each of the mounting brackets 40 consists of a main
body portion 42 and a head portion 44. The main body portion 42
is proportioned to fit in a close fitting relationship within
the recess 36 formed in the upper surface ~f the wedge member
32a. The head portion 44 extends transversely of and projects
laterally outwardly from opposite sides of the main portion to
form a support for the inner edge 46 of the side cover members 48.
As shown in Figs. 1 and 2 of the drawings, each of the
side covers 48 has an inner edge panel 46 and an outer edge panel
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50 which are connected to one another by a screen member 52.
The inner edge member 46 is formed with a plurality of notches
56 and the portions of the inner edge member disposed on
either side of the notches 56 has a shallow downward curvature
so a~ to extend over the laterally projecting portions of the
head 44 of the mounting brackets ~0.
The outer ide edges of the covers are secured by a
plurality of bolts 58 to the L-shaped frame members 18 and
opposite ends of the covers extend around the lips 45 which
are formed on the inner face of each end wall member l4.
The main body portions 42 of the mounting brackets 40
are located within the coil slots 24 between the wedge members
32a and the underside of the coil assemblies. The head portion
44 projects outwardly from the end of the wedge member 32a a
distance sufficient to enable the curved inner edge 46 of the
side wall cover 48 to extend inwardly and downwardly over the
head portion 44 to rest thereon. As shown in Fig. 2 of the
drawings, the mounting bracket 40 serves to maintain the lower
surface of the side covers above the plane 60 of the lower sur-
face 33 of the wedge 32a. This arrangement ensures that ifthe primary member is accidentally lowered into engagement
with the secondary memberj the lower surfaces 33 of the wedge
members 32 will provide the first contact surface and will
serve to space the side covers a sufficient distance above the
secondary member to ensure that the secondary member is not
damaged by contact with the side covers or vice versa.
These and other advantages of the prèeent invention
will be apparent to those skilled in the art. ~ -
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