--Q) Q)
c.
E
0
-0 s::::
0 -c.
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0.. ..
N
M
N
0
~
M"" '
Lt)
N
-(0 M
N
0
~T
CLi..
::I
~
0 .....
5
1\l\\l\\111\1\ \ \ll\l\\l\1 l\1
200318391
FIELD OF INVENTION
[001] The pt'esent invention relates to fluid pumps. More specifically, the present
invention is related to an integrated electric oil pump used in the lubrication system
ofvehicles specifically electric vehicles.
BACKGROUND OF THE INVENTION
[0001] Electric pumps are devices that deliver or pressurize liquids. It transfers
the mechanical energy of the prime mover or other external energy to the liquid,
10 which increases the liquid energy and is mainly used to transport liquids including
water, oil, acid and alkali liquids, emulsions, suspoemulsions, and liquid metals.
[0002] The existing electric oil pumps adopts the in-line magnet to be pasted
on the surface of the rotor core. The magnetic flux formed by the in-line magnet is
small, and the vibration and noise ofthe pump are relatively large; and therefore it
15 is inconvenient to install and not suitable for high-speed rotation.
20
25
[0003] Also, in existing electric oil pumps, the rotor assembly bonded with
magnets with shaft and has difficult/complex process of manufacturing and also it
is time consuming.
[0004] Also, in existing electric oil pumps required separate motor and
separated pumping system which additionally cause large space requirement.
[0005] Hence there is a requirement of an integrated electric oil pump which
is simple to manufacture, simple to assemble, less time consuming, and capable to
bear high speed and small in size.
OBJECTS OF THE INVENTION
[0006] The main object of a present invention is to provide an integrated
electric oil pump.
2
--Q) Q)
c..
E
0
-0 s::::
0 -c..
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0. ..
N
M
N
0
~
M"" '
1.1')
N
-(0 M
N
0
N_
I ,.
tnl
::I
~
.0. ..
[0007] The object of the present invention is to provide the oil pump that can
simply assembled.
[0008] Yet another object of the invention is to provide the oi I pump that can
capable to bear high speed.
5 [0009] Yet another object of the invention is to provide the oil pump that can
simple to manufacture.
[00010] Yet another object of the invention is to provide the oil pump that is
simple in size.
[000111 Yet another object of the invention is to provide the oil pump that is
10 high efficient.
15
20
[00012] Yet another object of the invention is to provide the oil pump that is
cost effective.
SUMMARY OF THE INVENTION
[00013] The present invention relates to fluid pumps. More specifically, the
present invention is related to an integrated electric oil pump used in the lubrication
system ofvehicles specifically electric vehicles.
[00014] The embodiment of present invention discloses an integrated electric
oil pump (200), the pump (200) includes a housing (II 0), the housing (I 00)
includes, a motor having a stator assembly (70) and a rotor assembly (SO), the stator
assembly (70) having a plurality oflaminated sheets (70A), the rotor assembly (SO)
having a rotor, the rotor assembly (SO) includes, a casing (S5) having atleast two
cavities (SOB) for fixing a magnet (SOA), each cavity (SOB) capable of fixing said
each magnet (SOA) by means of a fixing means, a shaft (SOC) configured to the
25 rotor assembly (SO), the shaft (SOC) rotates with the rotor, a rotor body (50)
configured to the housing (11 0) by fastening means, a gearing arrangement
3
--Q) Q)
c.
E
0
-0 s::::
0 -c.
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0.. ..
N
M
N
0
~
M"" '
Lt)
N
-(0 M
N
0
~T
C'J . L F> CJ
::I
~
0 .....
configured to the shaft (SOC) for transmitting the I iquid to the source, the gearing
arrangement housed inside the rotor body (50) wherein gearing arrangement freely
rotates inside the rotor body (50), a top cover (I 0) configured on top ofthe housing
(II 0) using fastening means, the top cover (I 0) having an inlet port (20) configured
5 for sucking a liquid from a source and an outlet port (30) configured for transmitting
said liquid to a next source, a bottom cover (1 00) configured to bottom of the
housing (II 0) using fastening means; and a controller (90) operably coupled to
bottom of the housing (II 0) by fastening means for controlling the motor speed.
The cavity (808) having at least one curved face (Rc, Rb) wherein atleast a length
10 one curved face (Rb) is greater than the other curved face (Rc ), the two faces (Ra,
Rd) of cavity having equal length. The electric oil pump (200) forms an integrated
assembly.
15
20
25
[00015] In an embodiment of present invention the casing (85) having but not
limited to ten cavities.
[00016] In an embodiment of present invention each magnet (80A) is fixed in
each cavity (85) by but not limited to epoxy resins.
[00017] In an embodiment of present invention the gearing arrangement is but
not limited to Gerotor gearing arrangement, wherein Gerotor arrangement having
an inner rotor and an outer rotor, wherein inner rotor having leaf and outer rotor
having node, wherein inner rotor having external teeth and outer rotor having
internal teeth.
[00018] In an embodiment of present invention the top cover (1 0), the rotor
body (50) and housing (11 0) configured using fastening means like but not limited
to screws, nut and bolts and alike.
[00019] In an embodiment of present invention the bottom cover (II 0), the
controller (90) fixed to housing (11 0) using fastening means like but not limited to
screws, nut and bolts and alike.
4
.. ,
.i l:~J ..... ~-:{. ::' ·:, --:;<
l:./ .. )/
--Q) Q)
c.
E
0
-0 s::::
0 -c.
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0. ..
N
M
N
0
~
M"" '
Lt)
N
-(0 M
N
0
N
I T
C)l..
::I
~
.0. ..
1=> rt t '··-'
[00020] In an embodiment of present invention the rotor assembly (80) easy to
manufacture, simple and easy to assemble with less time.
[00021] In an embodiment of present invention the inlet port (20) and outlet port
(30) having sealing means like but not limited to rubber or gaskets or orings (1 Ob ).
5 [00022] In an embodiment of present invention the integrated oil pump
assembly (200) forms as a single unit.
[00023] In an embodiment of present invention the stator with winding (70)
fixed inside the housing (11 0) by but not limited to overmolding process.
10 BRIEF DESCRIPTION OF THE DRAWINGS
15
20
[00024] The accompanying drawings constitute a part of the description and are
used to provide further understanding of the present invention. Such accompanying
drawings illustrate the embodiments of the present invention which are used to
describe the principles of the present invention together with the description.
[00025] FIG. 1 illustrates cross sectional view of integrated electric oil pump in
accordance to an embodiment of the present invention;
[00026] FIG. 2 illustrates exploded view of integrated electric oil pump m
accordance to an embodiment of the present invention;
[00027] FIG. 3 illustrates perspective view of integrated electric oil pump in
accordance to an embodiment of the present invention;
[00028] FIG. 4 cross sectional v1ew of integrated electric oil pump m
accordance to an embodiment of the present invention;
[00029] FIG. 5 illustrates top v1ew of rotor assebly m accordance to an
embodiment of the present invention.
5
_, .. - ' .. . -'- i
·~."'" """':'!
._Y /
--Q) Q)
c..
E
0
-0 s::::
0 -c..
·;::
CJ
1/J
Q) -c en
"e'n"
en
0
.0.. ..
N
M
N
0
~
M"'"
Lt)
N
-(0 M
N
0
~C).
l
::I
~
0 .....
5
[00030] FIG. 6 illustrates casing in accordance to an embodiment of the present
invention;
DETAILED DESCRIPTION OF THE INVENTION
[00031] As used in the description herein and throughout the claims that follow,
the meaning of "a," "an," and "the" includes plural reference unless the context
clearly dictates otherwise. Also, as used in the description herein, the meaning of
"in" includes "in" and "on" unless the context clearly dictates otherwise.
[00032] If the specification states a component or feature "may", "can"
'
10 "could", or "might" be included or have a characteristic, that particular component
or feature is not required to be included or have the characteristic.
[00033] Exemplary embodiments will now be described more fully hereinafter
with reference to the accompanying drawings, in which exemplary embodiments
are shown. This disclosure may however, be embodied in many different forms and
15 should not be construed as limited to the embodiments set forth herein.
20
[00034] The present invention relates to fluid pumps. More specifically, the
present invention is related to an integrated electric oil pump used in the lubrication
system ofvehicles specifically electric vehicles.
[00035] Referring Fig I, Fig 2, Fig 3 Fig 4, Fig 5 and Fig 6, shows an integrated
electric oil pump (200), the pump (200) includes a housing (II 0), the housing made
up ofbut not limited metal like aluminium, the housing (100) includes, a motor
having a stator assembly (70) and a rotor assembly (80), the stator assembly (70)
having a plurality oflaminated sheets (70A), the rotor assembly (80) having a rotor,
the rotor assembly (80) includes, a casing (85) having atleast two cavities (80B) for
25 fixing a magnet (80A), each cavity (80B) capable of fixing said each magnet (80A)
by means of a fixing means, the casing (85) having hole at centre, the diameter of
hole depends upon the diameter of shaft (80C), a shaft (80C) configured to the
6
.,..~ .:-. .. . ..... .,_ .:--.. . ..... ~ -:."
~ l '/• ;,u, ........ ·---· ;·-.-I··f ,···-,. ~~- L_ !..~! ~ .. :~ ·---··
--Q) Q)
c.
E
0
-0 s::::
0 -c.
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0.. ..
N
M
N
0
~
M"" '
Lt)
N
-(0 M
N
0
~T
C)l.
::I
~
0 .....
rotor assembly (80), the casing made up of but not limited to plastic, the shaft (80C)
rotates with the rotor, the casing (85) coupled to shaft (80C) by fastening means
such as but not limited to the shaft (SOC) at one end having threads so as to couple
the casing (85) by the bolt, a rotor body (50) configured to the housing (11 0) by
5 fastening means, a gearing arrangement configured to the shaft (80C) for
transmitting the liquid to the source, the gearing arrangement housed inside the
rotor body (50) wherein gearing arrangement freely rotates inside the rotor body
(50), a top cover (I 0) configured on top of the housing (11 0) using fastening means,
the top cover made up of metal like but not limited to aluminium, the top cover (1 0)
10 having an inlet port (20) configured for sucking a liquid from a source and an outlet
port (30) configured for transmitting said liquid to a next source, a bottom cover
(1 00) configured to bottom ofthe housing ( 11 0) using fastening means, the bottom
cover made up of metal like but not limited to aluminium; and a controller (90)
operably coupled to bottom of the housing ( 11 0) by fastening means for controlling
15 the motor speed. The cavity (SOB) having at least one curved face (Rc, Rb) wherein
atleast a length one curved face (Rb) is greater than the other curved face (Rc ), the
two faces (Ra, Rd) of cavity having equal length. The electric oil pump (200) forms
an integrated assembly.
[00036] In an embodiment of present invention the casing (S5) having but not
20 limited to ten cavities.
25
[00037] In an embodiment of present invention each magnet (SOA) is fixed in
each cavity (85) by but not limited to epoxy resins.
[00038] In an embodiment of present invention the gearing arrangement is but
not limited to internal gearing arrangement, the internal gearing arrangement like
but not limited to Gerotor gearing arrangement, wherein Gerotor arrangement
having an inner rotor and an outer rotor, wherein inner rotor having leaf and outer
rotor having node, wherein inner rotor having external teeth and outer rotor having
internal teeth.
7
o"~ ~H.J"• .... ·-::,. -:r-
L / ~} /
--Q) Q)
c..
E
0
-0 s::::
0 -c..
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0.. ..
N
M
N
0
~
M"" '
1.1')
N
-(0 M
N
0
~T
C) J.
::I
~
0 .....
[00039) In an embodiment of present invention the top cover (1 0), the rotor
body (50) and housing ( 11 0) configured using fastening means like but not limited
to screws, nut and bolts and alike.
[00040] In an embodiment of present invention the bottom cover (11 0), the
5 controller (90) fixed to housing ( 11 0) using fastening means like but not limited to
screws, nut and bolts and alike.
[00041] In an embodiment of present invention the rotor assembly (80) easy to
manufacture, simple and easy to assemble with less time.
[00042] In an embodiment of present invention the inlet port (20) and outlet port
10 (30) having sealing means like but not limited to rubber or gaskets (lOb).
15
[00043) In an embodiment of present invention the integrated oil pump
assembly (200) forms as a single unit.
[00044] In an embodiment of present invention the stator with winding (70)
fixed inside the housing (11 0) by but not limited to overmolding process.
[00045) In an embodiment of present invention the rotor assembly (80) consist
of a ten poles (magnets). These magnet are segmented magnets (80A) are not
bonded they integrated in plastic casing which is kind magnet holder/cavity (SOB),
alternate S type and N type magnet inserted magnet holder and epoxy material is
used here for making all magnets as part of rotor assembly such that it will resist to
20 come out the magnet out of magnet holder/casing (85). This process reduce
assembly time of rotor assembly and also the manufacturing process. Here there is
only need to assemble parts for assembly like epoxy resin, magnet and magnet
holder earlier/ prior art rotor assembly done by magnet bonding process which is
quite complex time taking process.
25 [00046] In an embodiment three terminal is there provided which connect motor
winding to the controller output for providing excitation to the stator.
8
.-:, -... - -:,. --,;
.l / "•o
·-·· c
--Q) Q)
c..
E
0
-0 s::::
0 -c..
·;::
CJ
1/J
Q) -c en
"e"n'"
en
0
.0.. ..
N
M
N
0
~
M""'"
Lt)
N
-(0 M
N
0
~T
C).l
::I
~
0 .....
5
[00047] Rotor assembly (80) of motor consist of magnet (80A) insetted in
magnet holder/casing (85) and epoxy material is used for sticking magnet (80A) in
magnet holder (85), such that to not come out of it while rotation and this is mounted
on the shaft (SOC) which is also connected to Ge rotor.
[00048] A non limiting operational characteristics of integrated electric oil
pump is explained.
[00049] When power received to controller (90) from power source like but not
limited to battery or engine of vehicle, the controller (90) starts the motor driver for
motor (rotor assembly (SO) and stator assembly (70)), motor converts electric
10 energy into mechanical energy and it gives rotation to the Ge rotor pumping unit,
pumping unit pump the oil from oil sump/source to lubricating the transmission
system (next source) of vehicle. Oil get suck from inlet port (20) and discharge from
the pressure/outlet port (30).
15
20
25
[00050] LIST OF REFERENCE NUMARALS:
.:~. .l tt ··~·
I 0. Top Cover
I Oa. Fasteners
1 Ob. Sealing
20. Inlet Port
30. Pressure/Outlet Port
40. Gerotor
50. Rotor Body
60.Shaft
70. Stator Assembly
SO. Rotor Assembly
80a. Segmented Magnet/Magnet
SOb. Cavity
SOc. Shaft
S5. Casing
90. Controller
·-·· ·-~-·
-~> F~ -~~ ·-=~
.1-. ·---· .L... . . ::_'i
9
-~~ -=r-
-~} _('
--Q) Q)
c.
E
0
-0 s::::
0 -c.
·;::
CJ
1/J
Q) -c en
"e"n'
en
0
.0.. ..
N
M
N
0
~
M"" '
Lt)
N
-(0 M
N
0
N
IT
C)j_
::I
~
0 .....
[00051]
I 00. Bottom Cover
11 0. Housing
ADVANTAGES
5 I. The mam advantage of the integrated oil pump is that simple to
manufacture, easy to assemble, cost effective, time efficient.
2. The advantage ofthe integrated oil pump is that it is compact in size.

CLAIMS
We Claim,
I. An integrated electric oil pump (200), the pump (200) comprises:
a housing (II 0), the housing (I 00) comprises:
a motor having a stator assembly (70) and a rotor assembly (SO);
the stator assembly (70) having a plurality of laminated
sheets (70A);
the rotor assembly (SO) having a rotor, the rotor assembly
(SO) comprises:
a casing (S5) having atleast two cavities (SOB) for
fixing a magnet (SOA), each cavity (SOB) capable of
fixing said each magnet (SOA) by means of a fixing
means;
a shaft (SOC) configured to the rotor assembly (SO),
the shaft (SOC) rotates with the rotor, the casing
coupled to shaft by fastening means;
a rotor body (50) configured to the housing (II 0) by fastening means;
a gearing arrangement configured to the shaft (SOC) for transmitting the
liquid to the source, the gearing arrangement housed inside the rotor body
(50) wherein gearing arrangement freely rotates inside the rotor body (50);
a top cover (1 0) configured on top of the housing (II 0) using fastening
means, the top cover (I 0) having an inlet port (20) configured for sucking a
liquid from a source and an outlet port (30) configured for transmitting said
liquid to a next source;
a bottom cover ( 1 00) configured to bottom of the housing (II 0) using
fastening means; and
II
(-.~ ;.--:). ....... ..-:-,. . .... ~ .-,~
;I~ ,..~.,_ ~··• L t~:_J L . .. )
1/J
E
Ill
~ en
"e"n'"
en
0
.0.. ..
N
M
N
0
~
M""'"
1.1')
N
-(0 M
N
0
N
I
C'J l
::I
~
0 .....
~· ., .....
!;oa•' f, l•
-'
5
a controller (90) operably coupled to bottom of the housing (11 0) by
fastening means for controlling the motor speed;
wherein the cavity (SOB) having at least one curved face (Rc, Rb) wherein
at least a length one curved face (Rb) is greater than the other curved face
(Rc), the two faces (Ra, Rd) of cavity having equal length;
wherein the electric oil pump (200) forms an integrated assembly.
2. The integrated electric oil pump (200) as claimed in claim I, wherein the casing
(85) having but not limited to ten cavities.
10 3. The integrated electric oi I pump (200) as claimed in claim I, wherein each
magnet (80A) is fixed in each cavity (85) by but not limited to epoxy resins.
4. The integrated electric oil pump (200) as claimed in claim I, wherein the gearing
arrangement is but not limited to Gerotor gearing arrangement, wherein Gerotor
arrangement having an inner rotor and an outer rotor, wherein inner rotor having
15 leaf and outer rotor having node, wherein inner rotor having external teeth and outer
rotor having internal teeth.
5. The integrated electric oil pump (200) as claimed in claim I, wherein the top
cover (I 0), the rotor body (50) and housing (11 0) configured using fastening means
like but not limited to screws, nut and bolts and alike.
20 6. The integrated electric oil pump (200) as claimed in claim I, wherein the bottom
cover (11 0), the controller (90) fixed to housing (II 0) using fastening means like
but not limited to screws, nut and bolts and alike.
7. The integrated electric oil pump (200) as claimed in claim l, wherein the rotor
assembly (80) easy to manufacture, simple and easy to assemble with less time.
25 8. The integrated electric oil pump (200) as claimed in claim I, wherein the inlet
port (20) and outlet port (30) having sealing means like but not limited to rubber or
gaskets ( 1 Ob ).
12
·-:~ ---::-·
-~~ i~"i. -~:~ -~: .::r /
.i.... '•.J ..!..... --·· 1 c~ . ,.
9. The integrated electric oil pump (200) as claimed in claim I, wherein the
integrated oil pump assembly (200) forms as a single unit.
10. The integrated electric oil pump (200) as claimed in claim I, wherein the stator
with winding (70) fixed inside the housing (I I 0) by but not limited to overmolding
5 process.