WO2020078994A1 - Pumping unit for feeding a fluid in a hydraulic circuit of a vehicle - Google Patents

Pumping unit for feeding a fluid in a hydraulic circuit of a vehicle Download PDF

Info

Publication number
WO2020078994A1
WO2020078994A1 PCT/EP2019/077953 EP2019077953W WO2020078994A1 WO 2020078994 A1 WO2020078994 A1 WO 2020078994A1 EP 2019077953 W EP2019077953 W EP 2019077953W WO 2020078994 A1 WO2020078994 A1 WO 2020078994A1
Authority
WO
WIPO (PCT)
Prior art keywords
pumping unit
hydraulic
cup
unit according
pumping
Prior art date
Application number
PCT/EP2019/077953
Other languages
French (fr)
Inventor
Pietro De Carlo
Gaetano Corallo
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2020078994A1 publication Critical patent/WO2020078994A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the present invention relates to a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle.
  • the present invention relates to a pumping unit of the type comprising an electric motor provided with a containing case, a stator housed inside the containing case, and a rotor rotatably engaged inside said stator.
  • the pumping unit further comprises a hydraulic pumping device connected to an output shaft of the rotor, and a control unit for controlling said hydraulic pumping device.
  • each pumping unit has a relatively small degree of flexibility since it is designed and used to feed a given type of fluid (for example water, diesel fuel, petrol, braking fluid or lubricating oil) in a given hydraulic circuit.
  • a given type of fluid for example water, diesel fuel, petrol, braking fluid or lubricating oil
  • each pumping unit for a specific use involves moreover the design and development of a relatively large number of different types of pumping units.
  • the object of the present invention is to provide a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle, which does not have the drawbacks described above and is simple and inexpensive to produce. According to the present invention a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle as claimed in the attached claims is provided.
  • Figure 1 is an exploded, schematic, perspective view, with parts removed for greater clarity, of a preferred embodiment of the pumping unit according to the present invention
  • FIG 2 is a schematic longitudinally sectioned view, with parts removed for greater clarity, of the pumping unit according to Figure 1;
  • Figure 3 is a schematic longitudinally sectioned view, with parts removed for greater clarity, of a variant of the pumping unit according to Figures 1 and 2.
  • 1 denotes in its entirety a pumping unit for feeding a fluid in a hydraulic circuit (not shown) of a vehicle (not shown).
  • the pumping unit 1 comprises an electric motor 2 comprising, in turn, a tubular containing case 3 which has a longitudinal axis 4, has the form of a cup-shaped body and is axially closed by an end wall 5 substantially perpendicular to said axis 4.
  • the case 3 houses inside it a stator 6 mounted coaxially with the axis 4 and is connected removably to an interchangeable hydraulic pumping device 7.
  • the device 7 is a water pump provided with a pump body 8 comprising a cup-shaped body 9 projecting inside the case 3 and the stator 6.
  • the cup-shaped body 9 has an annular flange 10 which projects radially outwards from the cup-shaped body 9 and is arranged between the case 3 and a cover 11 mounted on the outside of the case 3 so as to close the said cup shaped body 9.
  • the case 3 the cup-shaped body 9 with the associated flange 10 and the cover 11 are connected together removably by means of a plurality of fixing screws 12 distributed around the axis 4.
  • the device 7 has, incorporated therein, a rotor 13, which defines part of the electric motor 2 and is mounted rotatably inside the cup-shaped body 9 so as to rotate about the axis 4.
  • the rotor 13 is engaged in an angularly fixed manner by an output shaft 14 which extends through the rotor 13 coaxially with the axis 4 and has, keyed thereon, an impeller 15 of the hydraulic pumping device 7.
  • Removal of the fixing screws 12 allows replacement of the hydraulic pumping device 12, namely the assembly defined by the pump body 8, the rotor 13 and the impeller 15, with a different hydraulic pumping device 16.
  • the device 16 is a diesel-fuel pump provided with a pump body 17 comprising a cup-shaped body 18 projecting inside the case 3 and the stator 6.
  • the cup-shaped body 18 has an annular flange 19 which projects radially outwards from the cup-shaped body 18 and is arranged between the case 3 and a cover 20 mounted on the outside of the case 3 so as to close the said cup shaped body 18.
  • the device 16 has, incorporated therein, a rotor 21, which defines part of the electric motor 2 and is mounted rotatably inside the cup-shaped body 18 so as to rotate about the axis 4.
  • the rotor 21 is engaged in an angularly fixed manner by an output shaft 22 which extends through the rotor 21 coaxially with the axis 4 and has, keyed thereon, a first gear 23 of the hydraulic pumping device 16.
  • the device 16 further comprises a second gear 24 coupled to the gear 23, and a containing sleeve 25 which is arranged between the stator 6 and the cup-shaped body 18, is slidably engaged inside the case 3 and is arranged substantially in contact with the end wall 5.
  • the electric motor 2 also has, incorporated therein, an electronic control board (not shown) designed to control selectively the operation of the hydraulic pumping devices 7, 16.
  • the pumping unit 1 offers a number of advantages due mainly to the fact that the electric motor 2 is fixed and the fixing screws 12 allow it to be selectively connected removably together with the hydraulic pumping devices 7, 16.
  • the pumping unit 1 has a high degree of flexibility and allows the different types of hydraulic pumping devices, 7, 16 to be designed and developed for a specific use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A pumping unit for feeding a fluid in a hydraulic circuit of a vehicle has an electric motor (2) provided with a containing case (3) and a stator (6) housed inside said containing case (3), an interchangeable hydraulic pumping device (7; 16), and a plurality of fixing screws (12) for removably connecting the hydraulic pumping device (7; 16) to the containing case (3).

Description

Description
Title
PUMPING UNIT FOR FEEDING A FLUID IN A HYDRAULIC CIRCUIT OF A
VEHICLE
The present invention relates to a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle.
In particular, the present invention relates to a pumping unit of the type comprising an electric motor provided with a containing case, a stator housed inside the containing case, and a rotor rotatably engaged inside said stator.
The pumping unit further comprises a hydraulic pumping device connected to an output shaft of the rotor, and a control unit for controlling said hydraulic pumping device.
The known pumping units of the type described above have a number of drawbacks due mainly to the fact that, at present, in the motor vehicle sector, each pumping unit has a relatively small degree of flexibility since it is designed and used to feed a given type of fluid (for example water, diesel fuel, petrol, braking fluid or lubricating oil) in a given hydraulic circuit.
The manufacture of each pumping unit for a specific use involves moreover the design and development of a relatively large number of different types of pumping units.
The object of the present invention is to provide a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle, which does not have the drawbacks described above and is simple and inexpensive to produce. According to the present invention a pumping unit for feeding a fluid in a hydraulic circuit of a vehicle as claimed in the attached claims is provided.
The present invention will now be described with reference to the accompanying drawings which illustrate a non-limiting example of embodiment thereof, in which:
Figure 1 is an exploded, schematic, perspective view, with parts removed for greater clarity, of a preferred embodiment of the pumping unit according to the present invention;
Figure 2 is a schematic longitudinally sectioned view, with parts removed for greater clarity, of the pumping unit according to Figure 1; and
Figure 3 is a schematic longitudinally sectioned view, with parts removed for greater clarity, of a variant of the pumping unit according to Figures 1 and 2.
With reference to Figures 1 and 2, 1 denotes in its entirety a pumping unit for feeding a fluid in a hydraulic circuit (not shown) of a vehicle (not shown).
The pumping unit 1 comprises an electric motor 2 comprising, in turn, a tubular containing case 3 which has a longitudinal axis 4, has the form of a cup-shaped body and is axially closed by an end wall 5 substantially perpendicular to said axis 4.
The case 3 houses inside it a stator 6 mounted coaxially with the axis 4 and is connected removably to an interchangeable hydraulic pumping device 7.
In the example shown in Figures 1 and 2, the device 7 is a water pump provided with a pump body 8 comprising a cup-shaped body 9 projecting inside the case 3 and the stator 6.
The cup-shaped body 9 has an annular flange 10 which projects radially outwards from the cup-shaped body 9 and is arranged between the case 3 and a cover 11 mounted on the outside of the case 3 so as to close the said cup shaped body 9.
The case 3, the cup-shaped body 9 with the associated flange 10 and the cover 11 are connected together removably by means of a plurality of fixing screws 12 distributed around the axis 4.
The device 7 has, incorporated therein, a rotor 13, which defines part of the electric motor 2 and is mounted rotatably inside the cup-shaped body 9 so as to rotate about the axis 4.
The rotor 13 is engaged in an angularly fixed manner by an output shaft 14 which extends through the rotor 13 coaxially with the axis 4 and has, keyed thereon, an impeller 15 of the hydraulic pumping device 7.
Removal of the fixing screws 12 allows replacement of the hydraulic pumping device 12, namely the assembly defined by the pump body 8, the rotor 13 and the impeller 15, with a different hydraulic pumping device 16.
In the example shown in Figure 3, the device 16 is a diesel-fuel pump provided with a pump body 17 comprising a cup-shaped body 18 projecting inside the case 3 and the stator 6.
The cup-shaped body 18 has an annular flange 19 which projects radially outwards from the cup-shaped body 18 and is arranged between the case 3 and a cover 20 mounted on the outside of the case 3 so as to close the said cup shaped body 18.
The case 3, the cup-shaped body 18 with the associated flange 19 and the cover 20 are removably connected together by means of the screws 12.
The device 16 has, incorporated therein, a rotor 21, which defines part of the electric motor 2 and is mounted rotatably inside the cup-shaped body 18 so as to rotate about the axis 4. The rotor 21 is engaged in an angularly fixed manner by an output shaft 22 which extends through the rotor 21 coaxially with the axis 4 and has, keyed thereon, a first gear 23 of the hydraulic pumping device 16.
The device 16 further comprises a second gear 24 coupled to the gear 23, and a containing sleeve 25 which is arranged between the stator 6 and the cup-shaped body 18, is slidably engaged inside the case 3 and is arranged substantially in contact with the end wall 5.
In connection with that stated above it should be pointed out that the electric motor 2 also has, incorporated therein, an electronic control board (not shown) designed to control selectively the operation of the hydraulic pumping devices 7, 16.
The pumping unit 1 offers a number of advantages due mainly to the fact that the electric motor 2 is fixed and the fixing screws 12 allow it to be selectively connected removably together with the hydraulic pumping devices 7, 16.
Consequently, the pumping unit 1 has a high degree of flexibility and allows the different types of hydraulic pumping devices, 7, 16 to be designed and developed for a specific use.
Furthermore, owing to the interchangeability of the hydraulic pumping devices 7, 16, it is also possible to differentiate between the materials used to make the electric motor 2, namely the component least exposed to the fluids supplied by the pumping unit 1, and the materials used to make the hydraulic pumping devices 7, 16, namely the components which are most exposed to the fluids fed by said pumping unit 1.

Claims

Claims
1. - Pumping unit for feeding a fluid in a hydraulic circuit of a vehicle, the
pumping unit comprising an electric motor (2) comprising, in turn, a containing case (3) and a stator (6) housed inside said containing case (3); and being characterized in that it further comprises an interchangeable hydraulic pumping device (7; 16) and fixing means (12) for removably connecting the hydraulic pumping device (7; 16) to the containing case (3).
2. - Pumping unit according to Claim 1, wherein the hydraulic pumping device (7;16) comprises a pump body (8; 17) removably connected to the containing case (3) by means of said fixing means (12).
3. - Pumping unit according to Claim 2, wherein the pump body (8; 17)
comprises a cup-shaped body (9; 18) extending inside the containing case (3) and the stator (6) and a cover (11; 20) mounted outside the containing case (3) in order to close said cup-shaped body (9; 18).
4. - Pumping unit according to Claim 2 or 3, wherein the electric motor (2)
comprises a rotor (13; 21) mounted in, and rotatably coupled to, the pump body (8; 17), in particular mounted in, and rotatably coupled to, the cup shaped body (9; 18).
5. - Pumping unit according to Claim 4, wherein the rotor (13; 21) is provided with an output shaft (14; 22) mounted in the pump body (8; 17), in particular in the cup-shaped body (9; 18).
6. - Pumping unit according to any one of Claims 2 to 5, wherein the hydraulic pumping device (16) further comprises a containing sleeve (25) arranged between the pump body (17), in particular the cup-shaped body (18), and the stator (6).
7. - Pumping unit according to any one of the preceding claims and further comprising a control unit for controlling the hydraulic pumping device (7; 16); the control unit being housed inside the containing case (3) of the electric motor (2).
8. - Pumping unit according to any one of the preceding claims, wherein the hydraulic pumping device (7) comprises an impeller (15) coupled in an angularly fixed manner to an output shaft (14) of the electric motor (2).
9. - Pumping unit according to any one of Claims 1 to 7, wherein the hydraulic pumping device (16) comprises a pair of gears (23, 24) which are coupled together and one of which is coupled in an angularly fixed manner to an output shaft (22) of the electric motor (2).
PCT/EP2019/077953 2018-10-15 2019-10-15 Pumping unit for feeding a fluid in a hydraulic circuit of a vehicle WO2020078994A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000009450A IT201800009450A1 (en) 2018-10-15 2018-10-15 PUMPING GROUP FOR FEEDING A FLUID IN A HYDRAULIC CIRCUIT OF A VEHICLE
IT102018000009450 2018-10-15

Publications (1)

Publication Number Publication Date
WO2020078994A1 true WO2020078994A1 (en) 2020-04-23

Family

ID=64902312

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/077953 WO2020078994A1 (en) 2018-10-15 2019-10-15 Pumping unit for feeding a fluid in a hydraulic circuit of a vehicle

Country Status (2)

Country Link
IT (1) IT201800009450A1 (en)
WO (1) WO2020078994A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120177511A1 (en) * 2011-01-10 2012-07-12 Peopleflo Manufacturing, Inc. Modular Pump Rotor Assemblies
US20140234141A1 (en) * 2011-02-10 2014-08-21 Hideo Hoshi Pump configuration
US20160094099A1 (en) * 2014-09-25 2016-03-31 Magna Powertrain, Inc. Electric fluid pump with improved rotor unit, rotor unit therefor and methods of construction thereof
WO2018008839A1 (en) * 2016-07-05 2018-01-11 New Motech Co., Ltd. Pump for circulating water

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120177511A1 (en) * 2011-01-10 2012-07-12 Peopleflo Manufacturing, Inc. Modular Pump Rotor Assemblies
US20140234141A1 (en) * 2011-02-10 2014-08-21 Hideo Hoshi Pump configuration
US20160094099A1 (en) * 2014-09-25 2016-03-31 Magna Powertrain, Inc. Electric fluid pump with improved rotor unit, rotor unit therefor and methods of construction thereof
WO2018008839A1 (en) * 2016-07-05 2018-01-11 New Motech Co., Ltd. Pump for circulating water

Also Published As

Publication number Publication date
IT201800009450A1 (en) 2020-04-15

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