WO2023210977A1 - 펌프 - Google Patents
펌프 Download PDFInfo
- Publication number
- WO2023210977A1 WO2023210977A1 PCT/KR2023/003999 KR2023003999W WO2023210977A1 WO 2023210977 A1 WO2023210977 A1 WO 2023210977A1 KR 2023003999 W KR2023003999 W KR 2023003999W WO 2023210977 A1 WO2023210977 A1 WO 2023210977A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- area
- gear
- coupled
- center
- disposed
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C15/0065—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/008—Prime movers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/40—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/60—Shafts
Definitions
- This embodiment relates to a pump.
- the pump includes a motor area that generates rotational driving force and a pump area that generates hydraulic pressure. Therefore, since the motor area and the pump area within the pump are separated from each other, there is a problem in that the number of parts and the overall product are increased.
- the EOP may include a housing, a stator disposed within the housing, and an outer gear and an inner gear disposed within the stator.
- the arrangement area of the outer gear is set by a can placed between it and the stator, and the arrangement area of the inner gear is set by a cover coupled to the housing.
- the arrangement area of the outer gear and the inner gear is set by different parts, so there is a problem in that an accumulated tolerance occurs between a plurality of parts in the pump.
- the EOP according to the prior art does not have a means to support the axial load applied to the external rotor, as the operating pressure in the pump increases, the force applied at the outlet of the pump causes the external rotor or internal rotor to rotate. There is a problem with poor stability. In particular, when high pressure of 3 bar or more is generated, friction with the housing occurs due to the axis misalignment of the external rotor, which is a factor that impairs the performance of the pump.
- the purpose of this embodiment is to provide a pump that can improve production efficiency by improving assembly by improving the structure.
- the goal is to provide a pump that can manage the amount of eccentricity by minimizing the tolerance between the outer gear and the inner gear.
- the present invention aims to provide a pump that can evenly distribute the load caused by hydraulic pressure and improve the decrease in hydraulic pressure within the pump.
- the present invention aims to provide a pump that can be miniaturized by reducing its size.
- the pump includes a housing; A stator disposed within the housing; an outer gear disposed within the stator; an inner gear disposed within the outer gear; a shaft disposed at the center of the inner gear; It includes a bearing coupled to one end of the shaft, and the shaft includes a first region coupled to the inner gear and a second region coupled to the bearing, and the center of the first region and the second region The centers are different.
- the cross-sectional area of the first region may be larger than the cross-sectional area of the second region.
- the outer gear and the inner gear may rotate eccentrically.
- the axial length of the first area may correspond to the axial length of the inner gear and the outer gear.
- the length of the second area may be smaller than the length of the first area.
- the length of the second area may be less than 1/2 of the length of the first area.
- the center of the first area may correspond to the rotation center of the inner gear.
- the center of the second area may correspond to the rotation center of the outer gear.
- the distance between the center of the first area and the center of the second area based on the radial direction may be 0.02 mm or less.
- the inner gear may include a first hole to which the first region is coupled, and the bearing may include a second hole to which the second region is coupled.
- the eccentric amount between the outer gear and the inner gear can be set through the eccentric amount between the plurality of areas of the shaft, so there is an advantage that the precision of assembly between the plurality of parts can be improved.
- rotation components including bearings can be aligned through a single shaft, there is an advantage in that the overall size of the product can be reduced based on the axial direction.
- FIG. 1 is a perspective view of a pump according to an embodiment of the present invention.
- Figure 2 is an exploded perspective view of a pump according to an embodiment of the present invention.
- Figure 3 is an exploded perspective view of the outer gear, inner gear, and cover according to an embodiment of the present invention.
- Figure 4 is a cross-sectional view of a pump according to an embodiment of the present invention.
- Figure 5 is a view showing Figure 4 from another angle.
- Figure 6 is a cross-sectional view showing a combined structure of a cover, an outer gear, an inner gear, and a bearing according to an embodiment of the present invention.
- the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining and replacing.
- the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.
- the singular may also include the plural unless specifically stated in the phrase, and when described as “at least one (or more than one) of A, B, and C,” it is combined with A, B, and C. It can contain one or more of all possible combinations.
- first, second, A, B, (a), and (b) may be used.
- a component when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component. It may also include cases of being 'connected', 'combined', or 'connected' due to another component between and that other component.
- top or bottom refers not only to cases where the two components are in direct contact with each other, but also to the top or bottom of each component. It also includes cases where one or more other components are formed or disposed between two components. Additionally, when expressed as “top (above) or bottom (bottom),” it can include the meaning of not only the upward direction but also the downward direction based on one component.
- the 'axial direction' used below is defined as the direction forming the center of rotation of the inner gear or outer gear.
- the 'axial direction' may be the direction in which components decomposed based on FIG. 2 are combined.
- the 'radial direction' used below is defined as the direction perpendicular to the 'axial direction' described above.
- the 'radial direction' may be defined as the protruding direction of the first lobe from the inner surface of the outer gear and the protruding direction of the second lobe from the inner surface of the inner gear.
- the 'circumferential direction' used below is defined as the circumferential direction of any one of the stator, outer gear, and inner gear, or the circumferential direction of an area forming a virtual concentric circle with the circumferential direction of any one of the stator, outer gear, and inner gear. It can be.
- Figure 1 is a perspective view of a pump according to an embodiment of the present invention
- Figure 2 is an exploded perspective view of a pump according to an embodiment of the present invention
- Figure 3 is an exploded view of the outer gear, inner gear, and cover according to an embodiment of the present invention.
- Figure 4 is a cross-sectional view of the pump according to an embodiment of the present invention
- Figure 5 is a view showing Figure 4 from a different angle
- Figure 6 is a cover, outer gear, inner gear and This is a cross-sectional view showing the joint structure of the bearing.
- the pump 10 may have an external shape formed by combining the housing 100 and the cover 200.
- the cover 200 may be coupled to the lower surface of the housing 100.
- the housing 100 and the cover 200 may be screwed together through a screw 290.
- the housing 100 and the cover 200 may include a first coupling portion 112 and a second coupling portion 230 to which the screw 290 is coupled, respectively.
- the first coupling portion 112 and the second coupling portion 230 may be arranged to face each other in the vertical direction, and each may include a hole into which the screw 290 is coupled.
- the cover 200 may include an opening.
- a first opening through which fluid is sucked and a second opening through which circulated fluid is discharged may be formed on one surface of the cover 200.
- a third opening 212 connected to the first opening and a fourth opening 214 connected to the second opening may be formed on the other surface of the cover 200.
- the first opening and the second opening are formed on the lower surface of the cover 200, and the third opening 212 and the fourth opening 214 are coupled to the housing 100. It can be formed on the upper surface of .
- a mounting portion 210 that protrudes upward and is coupled to a space within the can 470, which will be described later, may be disposed on the upper surface of the cover 200.
- the cover 200 may be understood as including a cover body and a mounting portion 210 protruding from the upper surface of the cover body.
- the cross section of the mounting portion 210 may be circular.
- the mounting part 210 may be screwed into a space within the can 470.
- the cross-sectional shape of the mounting portion 210 may correspond to the cross-sectional shape of the space within the can 470.
- a ring-shaped sealing member 220 for sealing may be disposed between the outer peripheral surface of the mounting part 210 and the inner surface of the space within the can 470.
- the sealing member 220 is made of a rubber material and can prevent fluid from leaking between the outer peripheral surface of the mounting unit 210 and the inner surface of the space within the can 470.
- the outer surface of the mounting portion 210 may be more recessed than other areas, and a groove into which the sealing member 220 is coupled may be formed.
- a third opening 212 through which fluid is sucked and a fourth opening 214 through which the sucked fluid is discharged may be formed on the upper surface of the cover 200.
- the fluid may be oil.
- the third opening 212 and the fourth opening 214 may each be formed to have an arc shape, and the gap may be gradually narrowed from one side to the other. More specifically, the side with the wide spacing of the third openings 212 faces the side with the wide spacing of the fourth openings 214, and the side with the narrow spacing of the third openings 212 faces the fourth openings 214. ) can be arranged so that the spacing between them is narrow.
- the third opening 212 and the fourth opening 214 may be formed on the upper surface of the mounting part 210.
- the housing 100 may be made of resin or plastic, but is not limited thereto.
- the housing 100 may include an upper region 120 and a lower region 110.
- the upper region 120 may have a rectangular cross-section.
- the lower region 110 is disposed below the upper region 120 and may have a circular cross-section.
- a second space 122 may be formed inside the upper area 120.
- the second space 122 may have a groove shape.
- a plurality of electronic components for driving may be placed in the second space 122.
- a printed circuit board (not shown) and a terminal 395 may be placed in the second space 122. Multiple devices may be mounted on the printed circuit board.
- the housing 100 may include a first partition 101 (see FIG. 2) dividing the upper area 120 and the lower area 110.
- a hole may be formed in the center of the first partition 101 into which the first protrusion 478 of the can 470, which will be described later, is coupled.
- a separate cover may be coupled to the upper surface of the housing 100 to cover the second space 122.
- the separate cover may be called a second cover
- the cover 200 may be called a first cover 200.
- a stator (300) and a gear may be placed in the housing (100).
- the gear may be coupled to the cover 200.
- the stator 300 may be placed within the housing 100.
- the stator 300 may be formed integrally with the housing 100 by double injection.
- the stator 300 and the housing 100 may be formed integrally through insert injection.
- the stator 300 may be molded within the housing 100.
- a stator accommodation space in which the stator 300 is placed may be formed within the housing 100.
- the stator accommodation space may be disposed outside the first space 114.
- the outer surface of the stator 300 may be surrounded by the housing 100.
- the stator 300 may include a stator core 320 and a coil 310 wound around the stator core 320.
- the stator 300 may include an insulator (not shown) disposed to surround the outer surface of the core.
- the coil 310 may be wound on the outer surface of the insulator.
- a router 390 may be placed on the upper surface of the stator core 320, and the coils 310 protruding upward from the stator core 320 may be aligned by the router 390.
- a bus bar 340 may be disposed on the upper surface of the router 390, and an end of the coil 310 protruding upward from the stator core 320 may be fused to the bus bar 340.
- a terminal 395 may be disposed on the upper surface of the router 390, and the terminal 395 may have a shape that protrudes upward from the router 390.
- the printed circuit board may be electrically connected to the terminal 395.
- the first space 114 may be formed in the center of the housing 100.
- the first space 114 may be formed inside the lower area 110.
- the first space 114 may have a groove shape in which a portion of the lower surface of the housing 100 is depressed upward.
- the arrangement area of the stator 300 and the first space 114 may be partitioned by a second partition (not shown).
- the inner surface of the second partition wall may form the inner surface of the first space 114.
- the second partition wall may be disposed between the stator 300 and the external gear 410, which will be described later.
- the second partition wall may be formed to have a thickness of 0.2 mm to 1 mm.
- the second space 122 and the first space 114 may be partitioned in the upper and lower directions by the first partition 101.
- the lower surface of the first partition 101 may form the upper surface of the first space 114.
- the first space 114 and the second space 122 may be divided into different areas through the first partition 101. Accordingly, the fluid in the first space 114 can be prevented from flowing into the second space 122.
- the gear may be placed inside the stator 300.
- the gear may include an outer gear 410 and an inner gear 450.
- the outer gear 410 and the inner gear 450 may be disposed in the first space 114.
- the outer gear 410 may be disposed inside the stator 300.
- the second partition wall may be disposed between the outer gear 410 and the stator 300.
- the external gear 410 may include a core 411 and a magnet 412 mounted on the core 411.
- the magnet 412 may be disposed on the outer peripheral surface of the core 411 to correspond to the coil 310.
- the outer gear 410 may be a surface permanent magnet (SPM) type in which the magnet 412 is attached to the outer peripheral surface of the core 411.
- SPM surface permanent magnet
- a groove in which the magnet 412 is mounted may be formed on the outer peripheral surface of the core 411.
- the grooves may be provided in plural and arranged to be spaced apart from each other along the circumferential direction.
- a magnet guide 414 protruding outward may be formed on the outer peripheral surface of the core 411.
- the magnet guides 414 may be provided in plural numbers and arranged to be spaced apart from each other along the circumferential direction.
- a groove into which the magnets 412 are coupled may be formed between the plurality of magnet guides 414.
- the magnet guide 414 may support the side of the magnet 412.
- the axial length of the magnet guide 414 may be smaller than the axial length of the magnet 412.
- the side of the magnet guide 414 facing the side of the magnet 412 may be formed with an inclined surface whose circumferential length becomes longer toward the outside. Additionally, an inclined surface corresponding to the inclined surface may be formed on the side of the magnet 412 facing the side of the magnet guide 414.
- the outer gear 410 When current is applied to the coil 310 of the stator 300, the outer gear 410 may be rotated by electromagnetic interaction between the stator 300 and the outer gear 410.
- a first hole in which the inner gear 450 is disposed may be formed in the center of the outer gear 410.
- a plurality of peaks protruding inward from the inner circumferential surface and a plurality of valleys disposed between the plurality of peaks may be formed on the inner peripheral surface of the first hole. That is, a first gear in which a plurality of peaks and valleys are alternately arranged may be formed on the inner peripheral surface of the first hole.
- the inner gear 450 may be disposed inside the outer gear 410.
- the inner gear 450 may be placed in the first hole.
- the outer gear 410 may be referred to as an external rotor, and the inner gear 450 may be referred to as an internal rotor.
- the outer peripheral surface of the inner gear 450 may include a plurality of peaks 454 protruding outward from the outer peripheral surface and a valley portion 458 disposed between the plurality of peaks 454.
- a second gear may be formed on the outer peripheral surface of the inner gear 450 in which a plurality of peaks 454 and a plurality of valleys 458 are alternately arranged.
- the inner gear 450 moves outward in the radial direction based on the rotation center, and a second lobe having N gear teeth may be arranged along the circumferential direction.
- the outer gear 410 may be provided with N+1 first lobes facing inward in the radial direction.
- the first lobe may be arranged to be caught by the second lobe.
- the inner gear 450 may rotate by the first lobe and the second lobe.
- fluid may flow into the space within the can 470, which will be described later, or fluid within the space within the can 470 may be discharged to the outside.
- the outer gear 410 and the inner gear 450 may rotate eccentrically. Due to the eccentricity of the outer gear 410 and the inner gear 450, a volume capable of transporting fluid fuel is generated between the outer gear 410 and the inner gear 450, so that the volume increases. The fluid is sucked in due to a pressure drop, and the part where the volume is reduced discharges the fluid due to an increase in pressure.
- the inner gear 450 and the outer gear 410 may be arranged so that their centers do not coincide with each other.
- the rotation centers of the outer gear 410 and the inner gear 450 may be different.
- a hole 452 to which a shaft 250, which will be described later, is coupled may be formed in the center of the inner gear 450.
- the pump 10 may include a can 470.
- the can 470 may be placed in the first space 114.
- the can 470 may be made of a metal material.
- the can 470 may be formed integrally with the housing 100 by double injection. However, this is an example, and the can 470 may be made of plastic material.
- the can 470 includes a body portion 472, a lower end portion 474 protruding outward from the lower end of the body portion 472, and a first protruding portion 478 protruding upward from the upper surface of the body portion 472. ) may include.
- a space may be formed inside the body portion 472.
- the inner gear 450 and the outer gear 410 may be disposed in the space.
- the cross-sectional shape of the body portion 472 may be formed to correspond to the cross-sectional shape of the first space 114.
- the cross-sectional shape of the body portion 472 may be circular.
- the lower part 474 may be formed to be bent and extended outward from the lower end of the body part 472.
- the lower part 474 may be disposed between the lower surface of the housing 100 and the upper surface of the cover 200.
- the first protrusion 478 may be coupled to a hole in the first partition 101.
- the cross-sectional shape of the first protrusion 478 may be formed to correspond to the cross-sectional shape of the hole.
- the top of the first protrusion 478 may protrude upward from the top surface of the first partition 101.
- a bearing space may be formed within the first protrusion 478 to accommodate a bearing 490, which will be described later.
- the first protrusion 478 may have a smaller cross-sectional area than the body portion 472.
- the can 470 can prevent fluid in the first space 114 from flowing into the second space 122.
- the pump 10 may include a support 430.
- the support 430 is coupled to the outer gear 410 and can support the outer gear 410 within the first space 114.
- the support 430 has a circular cross-sectional shape and may be coupled to the upper part of the outer gear 410.
- the support 430 may be coupled to the external gear 410 by press fitting.
- the support 430 may include a base 432 disposed on one side of the outer gear 410.
- the base 432 may be coupled to the upper surface of the outer gear 410.
- the cross-sectional area of the base 432 may be smaller than the cross-sectional area of the outer gear 410.
- a hole through which a shaft 250, which will be described later, passes may be formed in the center of the base 432.
- the support 430 may include a coupling portion 434 that protrudes downward from the edge area of the base 432 and is coupled to the side of the outer gear 410.
- the coupling portion 434 may be disposed between the outer surface of the core 411 and the inner surface of the magnet 412.
- the inner surface of the coupling portion 434 may face the outer surface of the core 411, and the outer surface of the coupling portion 434 may face the inner surface of the magnet 412.
- the lower end of the coupling portion 434 may be in contact with the upper surface of the magnet guide 414.
- the coupling portion 434 may be press-fitted between the outer surface of the core 411 and the inner surface of the magnet 412.
- the support 430 may be disposed between the magnet 412 and the core 411.
- the core 411 may include a lower region where the magnet guide 414 is disposed on the outer peripheral surface, and an upper region disposed above the lower region and where the support 430 is coupled to the outer peripheral surface.
- the cross-sectional area of the upper region may be smaller than that of the lower region.
- the cross-sectional area of the space within the support 430 may correspond to the cross-sectional area of the upper region.
- the inner surface of the support 430 faces the outer surface of the upper region, and the outer surface of the support 430 faces the inner surface of the magnet 412.
- An adhesive area may be formed between the inner surface of the support 430 and the outer surface of the upper region, and between the outer surface of the support 430 and the inner surface of the magnet 412.
- the lower end of the support 430 may contact the upper surface of the lower area.
- the support 430 may include a second protrusion 436 that protrudes upward from the upper surface.
- the second protrusion 436 may protrude from the upper surface of the base 432 in a direction opposite to the protrusion direction of the coupling portion 434. That is, the second protrusion 436 may protrude upward from the upper surface of the base 432.
- the second protrusion 436 has a smaller cross-sectional area than the base 432 and may have a circular cross-sectional shape.
- the second protrusion 436 may be disposed in a bearing space within the first protrusion 478 of the can 470.
- the second protrusion 436 may be arranged to overlap the first partition 101 in the horizontal direction.
- the second protrusion 436 has a ring-shaped cross section with a space formed on the inside, and the bearing 490 may be disposed in the inner space of the second protrusion 436.
- the support 430 may be arranged to form the same center of rotation as the outer gear 410.
- the pump 10 may include a bearing 490.
- the bearing 490 may be disposed in the bearing space.
- the bearing 490 may be a ball bearing. Accordingly, the bearing 490 may include balls disposed between the outer ring and the inner ring.
- a coupling hole 495 (see FIG. 3) may be formed in the center of the bearing 490.
- a shaft 250 which will be described later, may be coupled to the coupling hole 495.
- the shaft 250 may be press-fitted into the coupling hole 495.
- the upper shaft 250 may be coupled to the inner ring.
- the outer surface of the shaft 250 may be in contact with the inner surface of the inner ring. Therefore, when the support 430 rotates together with the external gear 410, the bearing 490 can support the rotation of the shaft 250.
- the support 170 may rotate integrally with the bearing 490 and the external gear 410.
- the upper surface of the second protrusion 436 and the upper surface of the bearing 490 may be spaced apart from the lower surface of the first protrusion 478.
- the pump 10 may include a shaft 250.
- the shaft 250 may support rotation of the inner gear 450 or the outer gear 410.
- the shaft 250 may have a shape that protrudes upward from the top surface of the cover 200.
- the shaft 250 may have a shape that protrudes upward from the upper surface of the mounting unit 210.
- the shaft 250 may be formed as one body with the cover 200.
- the shaft 250 may include a first region 252 coupled to the inner gear 450 and a second region 254 coupled to the bearing 490.
- the first area 252 may be coupled to the hole 452 of the inner gear 450, and the second area 254 may be coupled to the coupling hole 495 of the bearing 490.
- the first area 252 may have a shape that protrudes upward from the top surface of the cover 200.
- the first area 252 may have a first diameter. Based on the axial direction, the first area 252 may have a first length (L1, see FIG. 6).
- the second area 254 may have a shape that protrudes upward from the top surface of the first area 252.
- the second area 254 may have a second diameter smaller than the first diameter.
- the second area 254 may have a second length (L2) that is smaller than the first length (L1).
- the second length (L2) may be less than 1/2 of the first length (L1).
- the cross-sectional area of the first area 252 may correspond to the cross-sectional area of the hole 452.
- the cross-sectional area of the second region 254 may correspond to the cross-sectional area of the coupling hole 495.
- the axial length of the first area 252 may correspond to the axial length of the inner gear 450 or the outer gear 410.
- the first area 252 and the second area 254 may each have a circular cross-section.
- the first area 252 and the second area 254 may have different centers.
- the center O1 of the first area 252 may be different from the center O2 of the second area 254.
- the first area 252 and the second area 254 may be arranged eccentrically. Based on the radial direction of the shaft 250, the distance between the center of the first area 252 and the center of the second area 254 may be 0.02 mm or less.
- the center O1 of the first area 252 may correspond to the rotation center of the inner gear 450.
- the center O2 of the second area 254 may correspond to the rotation center of the outer gear 410. Accordingly, the rotation of the bearing 490 and the outer gear 410 is supported around the second area 254, and the rotation of the inner gear 450 is supported around the first area 252. It can be.
- the eccentricity between the outer gear and the inner gear can be set through the eccentricity of the first and second regions, so there is an advantage that the precision of assembly between a plurality of parts can be improved.
- rotation components including bearings can be aligned through a single shaft, there is an advantage in that the overall size of the product can be reduced based on the axial direction.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims (10)
- 하우징;상기 하우징 내 배치되는 스테이터;상기 스테이터 내 배치되는 외측 기어;상기 외측 기어 내 배치되는 내측 기어;상기 내측 기어의 중앙에 배치되는 샤프트;상기 샤프트의 일단에 결합되는 베어링을 포함하고,상기 샤프트는 상기 내측 기어와 결합되는 제1영역과, 상기 베어링에 결합되는 제2영역을 포함하고,상기 제1영역의 중심과 상기 제2영역의 중심은 서로 상이한 펌프.
- 제1항에 있어서,상기 제1영역의 단면적은 상기 제2영역의 단면적 보다 큰 펌프.
- 제1항에 있어서,상기 외측 기어와 상기 내측 기어는 편심 회전하는 펌프.
- 제1항에 있어서,상기 제1영역의 축 방향 길이는 상기 내측 기어 및 상기 외측 기어의 축 방향 길이에 대응되는 펌프.
- 제1항에 있어서,축 방향을 기준으로, 상기 제2영역의 길이는 상기 제1영역의 길이 보다 작은 펌프.
- 제5항에 있어서,상기 제2영역의 길이는 상기 제1영역의 길이의 1/2 이하인 펌프.
- 제1항에 있어서,상기 제1영역의 중심은 상기 내측기어의 회전 중심에 대응되는 펌프.
- 제1항에 있어서,상기 제2영역의 중심은 상기 외측기어의 회전 중심에 대응되는 펌프.
- 제1항에 있어서,반경 방향을 기준으로 상기 제1영역의 중심과 상기 제2영역의 중심 간 거리는 0.02mm 이하인 펌프.
- 제1항에 있어서,상기 내측 기어는 상기 제1영역이 결합되는 제1홀을 포함하고,상기 베어링은 상기 제2영역이 결합되는 제2홀을 포함하는 펌프.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23796626.2A EP4517090A4 (en) | 2022-04-28 | 2023-03-27 | Pump |
| US18/843,612 US20250172140A1 (en) | 2022-04-28 | 2023-03-27 | Pump |
| CN202380026896.8A CN118871673A (zh) | 2022-04-28 | 2023-03-27 | 泵 |
| JP2024563551A JP2025514296A (ja) | 2022-04-28 | 2023-03-27 | ポンプ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2022-0052917 | 2022-04-28 | ||
| KR1020220052917A KR20230153556A (ko) | 2022-04-28 | 2022-04-28 | 펌프 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023210977A1 true WO2023210977A1 (ko) | 2023-11-02 |
Family
ID=88519227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/003999 Ceased WO2023210977A1 (ko) | 2022-04-28 | 2023-03-27 | 펌프 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250172140A1 (ko) |
| EP (1) | EP4517090A4 (ko) |
| JP (1) | JP2025514296A (ko) |
| KR (1) | KR20230153556A (ko) |
| CN (1) | CN118871673A (ko) |
| WO (1) | WO2023210977A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025105674A1 (ko) * | 2023-11-16 | 2025-05-22 | 엘지이노텍 주식회사 | 펌프 |
| KR102926694B1 (ko) | 2023-12-11 | 2026-02-13 | 지엠비코리아 주식회사 | 자석의 영향을 감소시키는 전동식 오일펌프 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050220653A1 (en) * | 2004-04-05 | 2005-10-06 | Shafer Clark J | Magnetically driven gear pump |
| JP3972465B2 (ja) * | 1998-05-29 | 2007-09-05 | 株式会社デンソー | 電動ポンプ |
| JP2012026294A (ja) * | 2010-07-20 | 2012-02-09 | Aisin Seiki Co Ltd | 流体ポンプ |
| US20200088180A1 (en) * | 2018-09-18 | 2020-03-19 | Lg Electronics Inc. | Compressor |
| KR20200120897A (ko) * | 2018-02-14 | 2020-10-22 | 스택폴 인터내셔널 엔지니어드 프로덕츠, 엘티디. | 스핀들을 구비한 지로터 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0641755B2 (ja) * | 1989-04-19 | 1994-06-01 | 日機装株式会社 | キャンド内接ギヤポンプ |
| JP2011190763A (ja) * | 2010-03-16 | 2011-09-29 | Denso Corp | 回転式ポンプ |
| KR20140075924A (ko) | 2012-12-11 | 2014-06-20 | 계양전기 주식회사 | 전동식 오일펌프 |
| US10240600B2 (en) * | 2017-04-26 | 2019-03-26 | Wilden Pump And Engineering Llc | Magnetically engaged pump |
| JP7568587B2 (ja) * | 2021-06-17 | 2024-10-16 | 株式会社ミツバ | 電動機およびその製造方法 |
-
2022
- 2022-04-28 KR KR1020220052917A patent/KR20230153556A/ko active Pending
-
2023
- 2023-03-27 US US18/843,612 patent/US20250172140A1/en active Pending
- 2023-03-27 WO PCT/KR2023/003999 patent/WO2023210977A1/ko not_active Ceased
- 2023-03-27 JP JP2024563551A patent/JP2025514296A/ja active Pending
- 2023-03-27 CN CN202380026896.8A patent/CN118871673A/zh active Pending
- 2023-03-27 EP EP23796626.2A patent/EP4517090A4/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3972465B2 (ja) * | 1998-05-29 | 2007-09-05 | 株式会社デンソー | 電動ポンプ |
| US20050220653A1 (en) * | 2004-04-05 | 2005-10-06 | Shafer Clark J | Magnetically driven gear pump |
| JP2012026294A (ja) * | 2010-07-20 | 2012-02-09 | Aisin Seiki Co Ltd | 流体ポンプ |
| KR20200120897A (ko) * | 2018-02-14 | 2020-10-22 | 스택폴 인터내셔널 엔지니어드 프로덕츠, 엘티디. | 스핀들을 구비한 지로터 |
| US20200088180A1 (en) * | 2018-09-18 | 2020-03-19 | Lg Electronics Inc. | Compressor |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4517090A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025514296A (ja) | 2025-05-02 |
| EP4517090A4 (en) | 2025-06-11 |
| CN118871673A (zh) | 2024-10-29 |
| KR20230153556A (ko) | 2023-11-07 |
| EP4517090A1 (en) | 2025-03-05 |
| US20250172140A1 (en) | 2025-05-29 |
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