WO2022219886A1 - ポンプ装置 - Google Patents
ポンプ装置 Download PDFInfo
- Publication number
- WO2022219886A1 WO2022219886A1 PCT/JP2022/003925 JP2022003925W WO2022219886A1 WO 2022219886 A1 WO2022219886 A1 WO 2022219886A1 JP 2022003925 W JP2022003925 W JP 2022003925W WO 2022219886 A1 WO2022219886 A1 WO 2022219886A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- pump device
- wall
- rotor
- housing body
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 8
- 238000003780 insertion Methods 0.000 claims description 19
- 230000037431 insertion Effects 0.000 claims description 19
- 230000004308 accommodation Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000005549 size reduction Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010720 hydraulic oil Substances 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 239000007769 metal material Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- 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
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
-
- 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
- F04C2/086—Carter
-
- 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
-
- 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
-
- 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
- F04C2210/00—Fluid
- F04C2210/20—Fluid liquid, i.e. incompressible
- F04C2210/206—Oil
-
- 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
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
Definitions
- the present invention relates to a pump device that sucks, pressurizes, and discharges fluid, and more particularly to a pump device that is bonded and fixed to a joint surface of an application object such as a cylinder block of an internal combustion engine or fluid equipment.
- a conventional pump device includes a pump body including an inner rotor and an outer rotor, a pump body defining a housing chamber that houses the pump body, a pump cover that covers the pump body housing the pump body, and a pump body that is coupled to the pump body.
- An oil pump is known which has a pump shaft protruding from a pump cover through a shaft, the outer wall surface of the pump cover is joined to the joint surface of the transaxle case, and the pump cover is fixed to the case using bolts (for example, See Patent Document 1).
- the pump body and the pump cover are only fixed to the case using bolts, they cannot be positioned with high accuracy in the direction perpendicular to the pump shaft, that is, in the direction along the joint surface.
- the width dimension of the pump body and the pump cover is sufficiently larger than the width dimension of the pump body, and the structure causes an increase in the size of the oil pump in the axial direction of the pump shaft.
- the pump shaft is supported by a single bearing provided in the pump cover, and after being assembled to the case, the tip side of the pump shaft is supported by the bearing inside the case. It is not a structure that reliably supports the pump shaft.
- Another pump device includes a trochoid including an inner rotor and an outer rotor, a casing defining a trochoid housing recess for housing the trochoid, a cover closing the trochoid housing recess, and a cover coupled to the inner rotor and protruding from the cover.
- An internal gear pump is known that includes a drive shaft that connects to a fixed plate of a device body, the outer wall surface of the cover is joined to the joint surface of the fixed plate of the device body, and is fixed to the fixed plate using screws (see, for example, Patent Document 2).
- the cover since the cover has a spigot that fits into the fitting hole of the fixed plate, the casing and the cover can be positioned with respect to the fixed plate in the direction along the joint surface.
- the plate thickness of the cover is reduced in order to reduce the thickness in the axial direction of the drive shaft, the surface rigidity of the cover around the spigot portion decreases, and there is a risk that desired positioning and mechanical strength cannot be secured.
- the present invention has been made in view of the above circumstances, and its object is to solve the above-mentioned problems of the prior art, and to achieve thinning and miniaturization while ensuring mechanical strength. , to provide a pump device.
- the pump device of the present invention comprises a rotor unit that pumps fluid, a housing that defines a suction port, a discharge port, and a storage chamber that stores the rotor unit, and a rotor unit that is coupled to the rotor unit and protrudes outside the housing.
- the housing Equipped with a rotating shaft that rotates about a predetermined axis, the housing includes a joint wall that is joined to the object to be applied, an outer peripheral wall that cooperates with the joint wall to define a storage chamber, and a housing that projects axially outwardly from the joint wall.
- the structure includes a bottomed cylindrical housing body integrally having a spigot fitted to an application object, and a flat housing cover coupled to the housing body to close the housing chamber. .
- a configuration may be adopted in which the thickness dimension of the joint wall is smaller than the thickness dimension of the outer peripheral wall.
- a configuration may be adopted in which the suction port and the discharge port are provided on the joint wall around the spigot portion.
- the housing body and the housing cover each include a plurality of insertion holes through which bolts to be fixed to the object to be applied are inserted, and the peripheral wall of the outer peripheral wall is such that the thickness dimension of the peripheral regions of the insertion holes is equal to the thickness dimension of the other regions.
- the thickness dimension of the housing cover may be larger than the thickness dimension of the joining wall of the housing body and smaller than the thickness dimension of the outer peripheral wall of the housing body.
- the housing body includes a first bearing hole inside the spigot portion that rotatably supports the one end region of the rotating shaft, and the housing cover rotatably supports the other end region of the rotating shaft.
- a configuration may be employed that includes a second bearing hole that supports the .
- the housing cover may employ a configuration including an annular convex portion that protrudes axially outward around the second bearing hole.
- the housing cover may employ a configuration including a fitting convex portion that fits into the fitting concave portion of the housing body.
- a configuration may be adopted in which the fitting concave portion of the housing body is formed as part of the inner edge portion that defines the housing chamber.
- the housing body includes screw holes into which screws are screwed
- the housing cover includes circular holes through which the screws are passed
- the housing cover is coupled to the housing body by screws. good too.
- the rotor unit may employ a configuration including an inner rotor that rotates integrally with the rotating shaft and an outer rotor that rotates in conjunction with the inner rotor.
- the pump device having the above configuration, it is possible to achieve thinness and miniaturization while ensuring mechanical strength.
- FIG. 3 is an exploded perspective view of the pump device shown in FIG. 2;
- FIG. 4 is an exploded perspective view of the pump device shown in FIG. 3; It is a sectional view which cut the pump device concerning one embodiment in the field which passes along the axis of the axis of rotation.
- FIG. 3 is a perspective cross-sectional view of a housing body, which forms part of the pump device according to one embodiment, taken along a plane passing through the axis of the rotating shaft;
- FIG. 3 is a cross-sectional view of a housing body, which forms part of the pump device according to one embodiment, taken along a plane passing through the axis of the rotating shaft; It is a front view showing the relationship between the rotor unit (inner rotor and outer rotor) included in the pump device according to one embodiment, the suction port and the discharge port, with the housing cover removed.
- a pump device M is joined and fixed to a cylinder block CB of an internal combustion engine as an application object.
- the cylinder block CB as an object to be applied includes a joint surface 1 for joining a pump device M, a cylindrical fitting recess 2, an outflow port 3 for hydraulic oil, and an inflow port for hydraulic oil. 4. It has three screw holes 5 into which bolts B are screwed.
- the pump device M includes a housing body 10 and a housing cover 20 as a housing H, a rotating shaft 30 centered on a predetermined axis S, an inner rotor 40 and an outer rotor as a rotor unit Ru. 50, a screw b for fastening the housing cover 20 to the housing body 10;
- the housing body 10 is formed in a cylindrical shape with a bottom using a metal material such as steel, cast iron, sintered steel, aluminum alloy, etc. As shown in FIGS. It has an accommodation chamber 13 , a spigot portion 14 , a suction port 15 , a discharge port 16 , a bearing hole 17 as a first bearing hole, three insertion holes 18 , and one screw hole 19 .
- the joint wall 11 is formed in a flat plate shape with a thickness dimension T1 and perpendicular to the axis S, and includes an outer wall surface 11a that is joined to the joint surface 1 of the cylinder block CB, which is an object to which it is applied, and a rotor unit.
- the Ru end surfaces 41, 51 define an inner wall surface 11b that slides in close contact therewith.
- the outer peripheral wall 12 protrudes cylindrically from the outer edge region of the joint wall 11 in the direction of the axis S to define an annular end face 12a, and has a thickness in a region away from the insertion hole 18.
- the thickness dimension T2 is formed larger than the thickness dimension T1 of the joint wall 11 .
- the thickness dimension T3 of the peripheral region of the insertion hole 18 is formed larger than the thickness dimension T2 of the other region away from the insertion hole 18 .
- the joining wall 11 having a flat plate shape and the outer peripheral wall 12 having a cylindrical shape are integrally formed. Therefore, the bending rigidity of the area where the joint wall 11 and the outer peripheral wall 12 are continuous can be increased compared to the conventional structure in which the joint wall is formed as a flat plate separate from the outer peripheral wall and joined. As a result, even if the joint wall 11 is formed thin, the mechanical strength of the housing body 10 as a whole and the surface rigidity of the joint wall 11 can be ensured. In particular, since the joint wall 11 is joined to the joint surface 1 of the cylinder block CB as an object to be applied, the deformation thereof can be further suppressed or prevented.
- the housing chamber 13 is a space defined by the joint wall 11 and the outer peripheral wall 12, and rotatably houses the rotor unit Ru. 8 and 9, the storage chamber 13 has an arcuate surface 13a forming a part of a cylindrical surface centered on an axis S1 deviated parallel to the axis S. As shown in FIGS.
- the circular arc surface 13a functions as an outer peripheral support surface that slidably supports the outer peripheral surface 53 of the outer rotor 50 forming a part of the rotor unit Ru.
- the inner edge of the arcuate surface 13a is part of the inner edge that defines the housing chamber 13, and functions as a fitting recess into which the fitting protrusion 22 of the housing cover 20 is fitted.
- the spigot portion 14 protrudes outward in the direction of the axis S from the joint wall 11 and is formed in a cylindrical shape centered on the axis S and having a thickness greater than the thickness dimension T1 of the joint wall 11 .
- the driven rotating body for example, the gear 6 coupled to the rotating shaft 30
- the driven rotating body for example, the gear 6
- the spigot joint portion 14 is formed so as to protrude from the thin plate-like joint wall 11, since the joint wall 11 is formed integrally with the outer peripheral wall 12, the surface rigidity of the joint wall 11 can be ensured. , the rigidity of the spigot joint portion 14 can also be ensured. As a result, the spigot joint portion 14 can be reliably fitted into the fitting concave portion 2 .
- the suction port 15 is formed penetrating from the outer wall surface 11a to the inner wall surface 11b in the joint wall 11 around the spigot portion 14 so as to form a contour that widens in the direction of rotation. Then, with the pump device M joined to the cylinder block CB, hydraulic oil guided from the outflow port 3 is drawn into the housing chamber 13 through the suction port 15 .
- the discharge port 16 extends inward from the outer wall surface 11a so as to form a contour that tapers in the direction of rotation in a region of the joint wall 11 around the spigot portion 14 and opposite to the suction port 15 with the spigot portion 14 interposed therebetween. It is formed so as to penetrate to the wall surface 11b. Then, with the pump device M joined to the cylinder block CB, the hydraulic oil pressurized in the housing chamber 13 is discharged through the discharge port 16 toward the inlet 4 .
- the bearing hole 17 is formed in a cylindrical shape about the axis S inside the spigot portion 14 so as to rotatably support the one end region 31 of the rotating shaft 30 .
- the bearing hole 17 is formed coaxially (axis line S) inside the spigot portion 14 provided in the joint wall 11 with increased surface rigidity, so that the bearing hole 17 is sufficiently large to support the rotating shaft 30 . mechanical strength can be ensured.
- the three insertion holes 18 are for inserting the bolts B to be screwed into the screw holes 5 of the cylinder block CB. is formed so as to penetrate the Here, since the thickness dimension T3 of the peripheral region of the three insertion holes 18 is formed to be larger than the thickness dimension T2 of the other regions, the mechanical strength is sufficient to withstand the tightening load (stress) of the bolt B. Strength can be secured.
- One screw hole 19 is for screwing in a screw b that joins the housing cover 20 to the housing body 10, and is formed in the end face 12a in a thick region near one insertion hole 18. As shown in FIG.
- the housing cover 20 is joined to the housing body 10 to close the housing chamber 13 of the housing body 10.
- the housing cover 20 is made of a material such as steel, cast iron, sintered steel, aluminum alloy, etc. and is a flat plate having a thickness T4. formed in the shape of 4 and 5, the housing cover 20 includes a connecting wall 21, a fitting convex portion 22, a bearing hole 23 as a second bearing hole, an annular convex portion 24, three insertion holes 25, and one A circular hole 26 is provided.
- the thickness T4 of the joint wall 21 region of the housing cover 20 is greater than the thickness T1 of the joint wall 11 of the housing body 10 and the thickness T1 of the outer peripheral wall 12 of the housing body 10. It is set to be smaller than the thickness dimension T2. As a result, the mechanical strength of the housing H as a whole can be ensured while reducing the width dimension W of the pump device M in the direction of the axis S.
- the connecting wall 21 is formed as a flat surface perpendicular to the axis S and is closely connected to the end face 12a of the housing body 10 .
- the fitting convex portion 22 is formed in a disc shape centering on the axis S1 and projecting in the direction of the axis S from the coupling wall 21 near the center of the housing cover 20, and defines an outer peripheral surface 22a and an inner wall surface 22b.
- the outer peripheral surface 22a is fitted to the inner edge of the arcuate surface 13a of the housing body 10 as a fitting recess.
- the inner wall surface 22b forms a flat surface perpendicular to the axis S so that the end surfaces 42, 52 of the rotor unit Ru can slide in close contact therewith.
- the fitting projection 22 is slightly press-fitted into the fitting recess (arc surface 13a), so that when the pump device M is handled, the housing can be easily removed by a mere fitting operation.
- the cover 20 can be connected to the housing body 10 so as not to fall off, and the mechanical strength and rigidity of the housing H as a whole can be increased.
- the bearing hole 23 is formed in a cylindrical shape around the axis S so as to rotatably support the other end region 32 of the rotating shaft 30 .
- the annular convex portion 24 is formed in a cylindrical shape that protrudes outward in the axis S direction around the bearing hole 23 .
- the annular protrusion 24 serves to increase the mechanical strength around the bearing hole 23 .
- the three insertion holes 25 are for inserting the bolts B to be screwed into the screw holes 5 of the cylinder block CB. formed.
- One circular hole 26 is formed in the vicinity of one insertion hole 25 for passing a screw b for coupling the housing cover 20 to the housing body 10 .
- the housing H is composed of the bottomed cylindrical housing body 10 integrally including the joint wall 11 and the outer peripheral wall 12, and the flat housing cover 20. Flexural rigidity and mechanical strength can be increased compared to the case where the is formed as a simple flat plate separately from the outer peripheral wall. Therefore, the thickness dimension T1 of the joint wall 11 can be formed thin, so that the width dimension W in the direction of the axis S of the pump device M can be reduced as shown in FIG. can do. Further, since the mechanical strength and surface rigidity can be ensured even if the thickness of the joint wall 11 is reduced, the rigidity of the spigot joint portion 14 integrally formed with the joint wall 11 can also be ensured.
- the housing H is joined by fitting the fitting protrusion 22 of the housing cover 20 to the fitting recess (the inner edge of the arcuate surface 13a) of the housing body 10, the housing H as a whole is mechanically stable.
- the strength and rigidity are increased, and the bearing holes 17 and 23 can be positioned coaxially (axis S) with high accuracy.
- the rotary shaft 30 is formed of a steel material or the like into a columnar shape extending in the direction of the axis S.
- One end region 31 is fitted into the bearing hole 17 of the housing body 10, and the other end region 32 is fitted into the housing cover. 20 is fitted in the bearing hole 23, and is rotatably supported around the axis S.
- the rotation shaft 30 can be rotatably supported around the axis S with high accuracy without causing the axis S to tilt.
- the rotating shaft 30 is shown in a simple form slightly protruding from the housing H in the direction of the axis S, and details of the end portion are omitted.
- the drive force of the drive rotor of the internal combustion engine is transmitted to the other end region 32 where the rotary shaft 30 protrudes from the housing cover 20, for example, the driven rotation of the gear 6, sprocket, pulley, etc.
- the driving force of the drive rotor e.g., rotor, drive shaft
- the driving force of the driving rotor of the internal combustion engine is transmitted to the one end region 31 where the rotating shaft 30 protrudes from the joint wall 11 of the housing body 10, for example, it may be directly connected to the driving rotor. formed in
- the rotor unit Ru is arranged in the housing chamber 13 so as to exert a pump action of sucking, pressurizing, and discharging working oil, and is composed of an inner rotor 40 and an outer rotor 50 .
- the inner rotor 40 is made of a metal material such as steel or sintered steel and is formed as an external gear having a trochoid curve tooth profile. 4 and 5, the inner rotor 40 has an end surface 41 sliding on the inner wall surface 11b of the housing body 10, an end surface 42 sliding on the inner wall surface 22b of the housing cover 20, and the rotary shaft 30. It has a fitting hole 43 , four protrusions 44 and four recesses 45 . 9, the inner rotor 40 rotates about the axis S in the direction of the arrow R together with the rotating shaft 30. As shown in FIG.
- the outer rotor 50 is made of a metal material such as steel or sintered steel, and is formed as an internal gear having a tooth profile that can mesh with the inner rotor 40 .
- the outer rotor 50 has an end face 51 that slides on the inner wall surface 11b of the housing body 10, an end face 52 that slides on the inner wall surface 22b of the housing cover 20, and an axis S1. It has a cylindrical outer peripheral surface 53 , five protrusions 54 and five recesses 55 .
- the outer peripheral surface 53 slidably contacts the arcuate surface 13 a of the housing body 10 .
- the five protrusions 54 and the five recesses 55 are formed so as to partially mesh with the four protrusions 44 and the four recesses 45 of the inner rotor 40 .
- the outer rotor 50 rotates in the same direction as the inner rotor 40 about the axis S ⁇ b>1 at a slower speed than the inner rotor 40 while interlocking with the rotation of the inner rotor 40 rotating about the axis S ⁇ b>1 .
- the inner rotor 40 and the outer rotor 50 are partially meshed with each other, the suction, pressurization, and discharge pump actions are continuously generated between them.
- the housing body 10, housing cover 20, rotating shaft 30, rotor unit Ru (inner rotor 40 and outer rotor 50), and one screw b are prepared in advance.
- the rotating shaft 30 is press-fitted into the fitting hole 43 of the inner rotor 40 and fixed so as to rotate together with the inner rotor 40 .
- a key groove, key, or the like may be employed to reliably restrict the relative rotation.
- the inner rotor 40 and the outer rotor 50 are fitted into the housing chamber 13 of the housing body 10, and the one end region 31 of the rotating shaft 30 is rotatably inserted into the bearing hole 17 of the housing body 10.
- the housing cover 20 is brought close to the housing body 10 in the direction of the axis S and joined to the housing body 10 so as to close the housing chamber 13 .
- the other end region 32 of the rotating shaft 30 is rotatably inserted into the bearing hole 23 of the housing cover 20 , and the fitting convex portion 22 of the housing cover 20 is aligned with the fitting concave portion (arc surface) of the housing body 10 . 13a).
- a screw b is screwed into the screw hole 19 of the housing body 10 through the circular hole 26 of the housing cover 20 .
- the housing cover 20 is coupled to the housing body 10 while housing the rotor unit Ru to which the rotating shaft 30 is coupled, and the assembly of the pump device M is completed.
- the above-described assembling procedure is an example, and assembling may be performed by other procedures.
- the housing cover 20 is coupled to the housing body 10 by fitting the fitting protrusion 22 into the fitting recess (the inner edge of the arcuate surface 13a that is part of the inner edge defining the housing chamber 13). Therefore, the mechanical strength of the housing H can be increased, and the housing cover 20 can be prevented from coming off.
- the housing cover 20 is fastened to the housing body 10 using the screw b, so that the housing cover 20 can be reliably prevented from coming off when the pump device M is handled during transport or the like. can be done.
- a gear 6 is applied as an example of the driven rotating body connected to the rotating shaft 30 .
- a pump device M as a product
- a gear 6, three bolts B, and a packing (not shown) as a liquid or molded body are prepared.
- the gear 6 is connected to the other end region 32 of the rotary shaft 30 of the pump device M. As shown in FIG.
- the pump device M is brought closer to the cylinder block CB in the direction of the axis S, and with a packing (not shown) interposed between the joint wall 11 (outer wall surface 11a) and the joint surface 1, the spigot joint portion 14 is opened. It is fitted in the fitting recess 2 .
- the pump device M is positioned on the joint surface 1 in the direction perpendicular to the axis S with high accuracy. Therefore, the gear 6 coupled to the rotary shaft 30 is positioned with high precision with respect to the drive rotor (not shown) of the internal combustion engine.
- the housing H of the pump device M achieves a reduced thickness while ensuring mechanical strength and rigidity.
- the fitting work can be easily performed without causing deformation or the like in the joint wall 11 around the portion 14 .
- the outflow port 3 of the cylinder block CB communicates with the suction port 15 of the pump device M
- the inflow port 4 of the cylinder block CB communicates with the discharge port 16 of the pump device M. communicates with
- the housing H includes the joint wall 11 joined to the object to be applied, and the outer peripheral wall 12 defining the accommodation chamber 13 in cooperation with the joint wall 11. , and a bottomed cylindrical housing body 10 integrally having a spigot portion 14 projecting outward from the joint wall 11 in the direction of the axis S and fitted to an application object; Since the structure includes the flat plate-like housing cover 20 coupled to the axis S The width dimension W in the direction can be reduced, and thinning and miniaturization can be achieved.
- the width W is reduced while ensuring the mechanical strength of the housing H as a whole. be able to.
- the suction port 15 and the discharge port 16 in the joint wall 11 only by joining the pump device M to the joint surface 1 of the cylinder block CB as an application object, the suction port 15 and the hydraulic fluid outflow port 3 can be communicated, and the discharge port 16 and the hydraulic fluid inflow port 4 can be communicated. Therefore, the mounting work can be simplified compared to a configuration in which the suction port or the discharge port is arranged in another region.
- the present invention is not limited to this, and bearings (including inner rings, rolling elements, and outer rings) may be used as necessary. ), or a configuration in which the rotating shaft 30 is supported via a cylindrical bush.
- a configuration may be employed in which an annular seal member is arranged adjacent to the bearing.
- the housing cover is fitted to the housing body as the fitting convex portion and the fitting concave portion. ) is shown, but it is not limited to this.
- the housing cover is provided with an annular convex portion as a fitting convex portion
- the housing body is provided with an annular convex portion as a fitting concave portion.
- a configuration may be employed in which an annular groove is provided and the annular protrusion is fitted into the annular groove.
- the screw b for fastening the housing cover 20 to the housing body 10 is used, but the present invention is not limited to this.
- the screw b may be eliminated if the fitting with the inner edge of the circular arc surface 13a as a part of the defining inner edge can be press-fitted to reliably prevent falling off.
- the rotor unit Ru including the inner rotor 40 and the outer rotor 50 having a trochoidal tooth profile was shown as the rotor unit exerting a pumping action, but it is not limited to this.
- a rotor unit having an inner rotor and an outer rotor with an involute tooth profile, or an inner rotor and an outer rotor with other tooth profile, or the like may be employed.
- a rotor unit including a vane type rotor or other positive displacement rotor may be employed.
- the inner rotor 40 and the outer rotor 50 constituting the rotor unit Ru are shown to be composed of four trochoidal lobes and five nodes. may be adopted.
- the cylinder block CB of an internal combustion engine mounted on an automobile or the like is shown as an object to which the pump device M according to the present invention is applied. It may be applied to lubricated equipment, and may be applied to fluid equipment that uses fluid other than hydraulic oil.
- the pump device of the present invention can achieve thinness and miniaturization while ensuring mechanical strength. It can be applied not only to objects, but also to other lubricating devices, and is also useful in fluid devices that handle fluids other than hydraulic oil.
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
また、ポンプボディ及びポンプカバーの幅寸法は、それぞれポンプ体の幅寸法よりも十分に大きく、ポンプシャフトの軸線方向においてオイルポンプの大型化を招く構造である。さらに、ポンプシャフトは、ポンプカバーに設けられた一つのベアリングで支持されており、ケースへの組み付け後においてケース内のベアリングによりポンプシャフトの先端側が支持される構造であるため、オイルポンプとしては、ポンプシャフトが確実に支持される構造ではない。
一実施形態に係るポンプ装置Mは、適用対象物として内燃エンジンのシリンダブロックCBに接合されて固定されるものである。
ここで、適用対象物としてのシリンダブロックCBは、図1に示すように、ポンプ装置Mを接合する接合面1、円筒状の嵌合凹部2、作動油の流出口3、作動油の流入口4、ボルトBを捩じ込む三つのネジ穴5を備えている。
外周壁12は、図6及び図7に示すように、接合壁11の外縁領域から軸線S方向に筒状に突出して環状の端面12aを画定すると共に、挿通孔18から離れた領域において肉厚寸法T2をなし、挿通孔18の周辺領域において肉厚寸法T3をなすように形成されている。
ここで、肉厚寸法T2は、接合壁11の肉厚寸法T1よりも大きく形成されている。また、挿通孔18の周辺領域の肉厚寸法T3は、挿通孔18から離れた他の領域の肉厚寸法T2よりも大きく形成されている。
特に、接合壁11は、適用対象物としてのシリンダブロックCBの接合面1に接合されるため、その変形をさらに抑制ないし防止することができる。
また、収容室13は、図8及び図9に示すように、軸線Sから平行に偏倚した軸線S1を中心とする円筒面の一部をなす円弧面13aを備えている。
円弧面13aは、ロータユニットRuの一部をなすアウターロータ50の外周面53を摺動自在に支持する外周支持面として機能する。
また、円弧面13aの内縁部は、収容室13を画定する内縁部の一部であり、ハウジングカバー20の嵌合凸部22を嵌合する嵌合凹部としても機能する。
これにより、ポンプ装置Mは、軸線Sに垂直な方向において接合面1に高精度に位置決めされる。したがって、回転軸30に結合される被動回転体(例えば、歯車6)が内燃エンジンの駆動回転体により回転駆動される場合は、駆動回転体に対して被動回転体を高精度に位置決めすることができる。
また、インロー部14は、薄板状の接合壁11から突出して形成されるものの、接合壁11が外周壁12と一体的に形成されているため、接合壁11の面剛性を確保することができ、インロー部14の剛性も確保することができる。その結果、インロー部14を嵌合凹部2に確実に嵌合させることができる。
このように、軸受孔17は、面剛性が高められた接合壁11に設けられたインロー部14の内側において同軸(軸線S)上に形成されているため、回転軸30を支持するために十分な機械的強度を確保することができる。
ここで、三つの挿通孔18の周辺領域の肉厚寸法T3は、他の領域の肉厚寸法T2よりも大きく形成されているため、ボルトBの締付け荷重(応力)に十分に耐え得る機械的強度を確保することができる。
そして、ハウジングカバー20は、図4及び図5に示すように、結合壁21、嵌合凸部22、第2軸受孔としての軸受孔23、環状凸部24、三つの挿通孔25、一つの円孔26を備えている。
ここで、ハウジングカバー20の結合壁21の領域の肉厚寸法T4は、図6に示すように、ハウジングボディ10の接合壁11の肉厚寸法T1よりも大きく、ハウジングボディ10の外周壁12の肉厚寸法T2よりも小さくなるように設定されている。
これにより、ポンプ装置Mの軸線S方向における幅寸法Wを小さくしつつ、ハウジングH全体としての機械的強度を確保することができる。
嵌合凸部22は、ハウジングカバー20の中央寄りにおいて、軸線S1を中心とし結合壁21から軸線S方向に突出する円盤状に形成されており、外周面22a及び内壁面22bを画定している。外周面22aは、ハウジングボディ10の嵌合凹部としての円弧面13aの内縁部に嵌合される。内壁面22bは、ロータユニットRuの端面42,52が密接して摺動するべく軸線Sに垂直な平坦面をなす。
環状凸部24は、軸受孔23の周りにおいて、軸線S方向の外側に突出する円筒状に形成されている。そして、環状凸部24は、軸受孔23の周りの機械的強度を高める役割をなす。
一つの円孔26は、ハウジングカバー20をハウジングボディ10に結合するネジbを通すものであり、一つの挿通孔25の近傍に形成されている。
したがって、接合壁11の肉厚寸法T1を薄く形成することができ、それ故に、図6に示すように、ポンプ装置Mの軸線S方向における幅寸法Wを小さくでき、薄型化、小型化を達成することができる。また、接合壁11の肉厚を薄くしても機械的強度及び面剛性を確保することができるため、接合壁11に一体形成されるインロー部14の剛性も確保することができる。
さらに、ハウジングHは、ハウジングボディ10の嵌合凹部(円弧面13aの内縁部)に対してハウジングカバー20の嵌合凸部22が嵌合されて結合されるため、ハウジングH全体としての機械的強度及び剛性が高まり、又、軸受孔17と軸受孔23とを同軸(軸線S)上に高精度に位置決めすることができる。
このように、ハウジングHに対して、回転軸30の一端側領域31及び他端側領域32が支持されるため、従来のように一端側領域のみがハウジングにより支持され他端側領域が適用対象物に支持される構造に比べて、軸線Sの傾きを生じることなく、回転軸30を軸線S回りに回動自在に高精度に支持することができる。
実際には、回転軸30が、ハウジングカバー20から突出する他端側領域32において、内燃エンジンの駆動回転体の駆動力が伝達される場合は、例えば、歯車6、スプロケット、プーリー等の被動回転体が連結され、又、電動モータの駆動回転体(例えば、ロータ、駆動軸)の駆動力が伝達される場合は、駆動回転体に伝達部材を介して又は直接連結されるように形成される。
一方、回転軸30が、ハウジングボディ10の接合壁11から突出する一端側領域31において、内燃エンジンの駆動回転体の駆動力が伝達される場合は、例えば、駆動回転体に直接連結されるように形成される。
インナーロータ40は、鋼又は焼結鋼等の金属材料を用いて、トロコイド曲線による歯形をもつ外歯車として形成されている。そして、インナーロータ40は、図4及び図5に示すように、ハウジングボディ10の内壁面11bを摺動する端面41、ハウジングカバー20の内壁面22bを摺動する端面42、回転軸30を嵌合する嵌合孔43、四つの凸部44及び四つの凹部45を備えている。
そして、インナーロータ40は、図9に示すように、軸線Sを中心として、矢印R方向に回転軸30と一体的に回転する。
外周面53は、ハウジングボディ10の円弧面13aに摺動自在に接触する。
五つの凸部54及び五つの凹部55は、インナーロータ40の四つの凸部44及び四つの凹部45と部分的に噛み合うように形成されている。
また、インナーロータ40とアウターロータ50とが部分的に噛合うことにより、両者の間において、吸入、加圧、及び吐出のポンプ作用が連続的に生じる。
予め、ハウジングボディ10、ハウジングカバー20、回転軸30、ロータユニットRu(インナーロータ40及びアウターロータ50)、一つのネジbが準備される。
先ず、回転軸30が、インナーロータ40の嵌合孔43に圧入嵌合されて、インナーロータ40と一体的に回転するように固定される。尚、単なる圧入だけではなく、キー溝及びキー等を採用して、相対的な回転を確実に規制する手段を講じてもよい。
続いて、ハウジングカバー20が、軸線S方向からハウジングボディ10に近づけられて収容室13を閉塞するように、ハウジングボディ10に結合される。
具体的には、ハウジングカバー20の軸受孔23に回転軸30の他端側領域32が回動自在に挿入され、ハウジングカバー20の嵌合凸部22がハウジングボディ10の嵌合凹部(円弧面13aの内縁部)に嵌合される。
これにより、回転軸30が結合されたロータユニットRuを収容した状態で、ハウジングカバー20がハウジングボディ10に結合され、ポンプ装置Mの組み付けが完了する。
尚、上記組み付け手順は、一例であり、その他の手順で組み付けを行ってもよい。
先ず、製品としてのポンプ装置M、歯車6、三つのボルトB、液体又は成形体としてのパッキン(不図示)が準備される。
続いて、ポンプ装置Mの回転軸30の他端側領域32に歯車6が連結される。
これにより、ポンプ装置Mは、軸線Sに垂直な方向において接合面1に高精度に位置決めされる。それ故に、内燃エンジンの駆動回転体(不図示)に対して、回転軸30に結合された歯車6が高精度に位置決めされる。
続いて、三つのボルトBが、それぞれ対応する挿通孔25,18に挿通されて、三つのネジ穴5に捩じ込まれ、ポンプ装置MがシリンダブロックCBに固定される。
これにより、シリンダブロックCBに対するポンプ装置Mの装着作業が完了する。
尚、ポンプ装置MがシリンダブロックCBに装着された状態において、シリンダブロックCBの流出口3はポンプ装置Mの吸入口15に連通し、シリンダブロックCBの流入口4はポンプ装置Mの吐出口16に連通している。
すると、インナーロータ40とアウターロータ50に挟まれる空間Cinが徐々に拡大して、流出口3から導かれた作動油が、吸入口15を経て空間Cin内に吸い込まれる。
上記一連の動作が連続的に繰り返されることにより、作動油が、連続的に、吸入され、加圧され、吐出される。
また、接合壁11において、インロー部14、吸入口15及び吐出口16を設ける構成とすることにより、ポンプ装置Mを適用対象物としてのシリンダブロックCBの接合面1に接合するだけで、吸入口15と作動油の流出口3を連通させかつ吐出口16と作動油の流入口4を連通させることができる。したがって、別の領域に吸入口又は吐出口が配置される構成に比べて、装着作業を簡素化できる。
また、必要に応じて、作動油の漏れを確実に防止するべく、環状のシール部材を、軸受に隣接して配置する構成を採用してもよい。
例えば、インボリュート歯形のインナーロータ及びアウターロータ、あるいはその他の歯形をなすインナーロータ及びアウターロータ等を備えたロータユニットを採用してもよい。また、流体にポンプ作用を及ぼすロータユニットであれば、ベーン式のロータ、その他の容積型ロータを含むロータユニットを採用してもよい。
1 接合面
2 嵌合凹部
3 流出口
4 流入口
5 ネジ穴
B ボルト
6 歯車(被動回転体)
M ポンプ装置
S 軸線
b ネジ
H ハウジング
10 ハウジングボディ(ハウジング)
11 接合壁
12 外周壁
13 収容室
13a 円弧面(収容室を画定する内縁部の一部、嵌合凹部)
14 インロー部
15 吸入口
16 吐出口
17 軸受孔(第1軸受孔)
18 挿通孔
19 ネジ穴
20 ハウジングカバー(ハウジング)
21 結合壁
22 嵌合凸部
23 軸受孔(第2軸受孔)
24 環状凸部
25 挿通孔
26 円孔
30 回転軸
31 一端側領域
32 他端側領域
Ru ロータユニット
40 インナーロータ
50 アウターロータ
T1 接合壁の肉厚寸法
T2 外周壁の肉厚寸法(他の領域の肉厚寸法)
T3 挿通孔の周辺領域の肉厚寸法
T4 ハウジングカバーの肉厚寸法
Claims (11)
- 流体にポンプ作用を及ぼすロータユニットと、
吸入口,吐出口,及び前記ロータユニットを収容する収容室を画定するハウジングと、
前記ロータユニットに結合されて前記ハウジングの外側に突出すると共に所定の軸線回りに回転する回転軸と、を備え、
前記ハウジングは、適用対象物に接合される接合壁,前記接合壁と協働して前記収容室を画定する外周壁,及び前記接合壁から前記軸線方向の外側に突出して前記適用対象物に嵌合されるインロー部を一体的に有する有底筒状のハウジングボディと、前記収容室を閉塞するべく前記ハウジングボディに結合される平板状のハウジングカバーと、を含む、
ことを特徴とするポンプ装置。 - 前記接合壁の肉厚寸法は、前記外周壁の肉厚寸法よりも小さい、
ことを特徴とする請求項1に記載のポンプ装置。 - 前記吸入口及び前記吐出口は、前記インロー部の周りにおいて、前記接合壁に設けられている、
ことを特徴とする請求項1又は2に記載のポンプ装置。 - 前記ハウジングボディ及び前記ハウジングカバーは、前記適用対象物に固定するボルトを挿通させる複数の挿通孔を含み、
前記外周壁は、前記挿通孔の周辺領域の肉厚寸法が他の領域の肉厚寸法よりも大きく形成されている、
ことを特徴とする請求項1ないし3いずれか一つに記載のポンプ装置。 - 前記ハウジングカバーの肉厚寸法は、前記接合壁の肉厚寸法よりも大きく、前記外周壁の肉厚寸法よりも小さい、
ことを特徴とする請求項1ないし4いずれか一つに記載のポンプ装置。 - 前記ハウジングボディは、前記インロー部の内側において、前記回転軸の一端側領域を回動自在に支持する第1軸受孔を含み、
前記ハウジングカバーは、前記回転軸の他端側領域を回動自在に支持する第2軸受孔を含む、
ことを特徴とする請求項1ないし5いずれか一つに記載のポンプ装置。 - 前記ハウジングカバーは、前記第2軸受孔の周りにおいて、前記軸線方向の外側に突出する環状凸部を含む、
ことを特徴とする請求項6に記載のポンプ装置。 - 前記ハウジングカバーは、前記ハウジングボディの嵌合凹部に対して嵌合される嵌合凸部を含む、
ことを特徴とする請求項1ないし7いずれか一つに記載のポンプ装置。 - 前記嵌合凹部は、前記収容室を画定する内縁部の一部として形成されている、
ことを特徴とする請求項8に記載のポンプ装置。 - 前記ハウジングボディは、ネジを捩じ込むネジ穴を含み、
前記ハウジングカバーは、前記ネジを通す円孔を含み、
前記ハウジングカバーは、前記ネジにより前記ハウジングボディに結合されている、
ことを特徴とする請求項1ないし9いずれか一つに記載のポンプ装置。 - 前記ロータユニットは、前記回転軸と一体的に回転するインナーロータと、前記インナーロータに連動して回転するアウターロータを含む、
ことを特徴とする請求項1ないし10いずれか一つに記載のポンプ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280011123.8A CN116745528A (zh) | 2021-04-13 | 2022-02-02 | 泵装置 |
US18/274,207 US20240084799A1 (en) | 2021-04-13 | 2022-02-02 | Pump device |
DE112022002136.5T DE112022002136T5 (de) | 2021-04-13 | 2022-02-02 | Pumpvorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021067626A JP2022162691A (ja) | 2021-04-13 | 2021-04-13 | ポンプ装置 |
JP2021-067626 | 2021-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022219886A1 true WO2022219886A1 (ja) | 2022-10-20 |
Family
ID=83639553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/003925 WO2022219886A1 (ja) | 2021-04-13 | 2022-02-02 | ポンプ装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240084799A1 (ja) |
JP (1) | JP2022162691A (ja) |
CN (1) | CN116745528A (ja) |
DE (1) | DE112022002136T5 (ja) |
WO (1) | WO2022219886A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001182669A (ja) * | 1999-12-27 | 2001-07-06 | Mikuni Adec Corp | トロコイドポンプ |
JP2018127978A (ja) * | 2017-02-09 | 2018-08-16 | アイシン精機株式会社 | 電動ポンプ |
JP2019027432A (ja) * | 2017-07-31 | 2019-02-21 | 日本電産トーソク株式会社 | 電動オイルポンプ |
WO2019225425A1 (ja) * | 2018-05-21 | 2019-11-28 | Ntn株式会社 | 電動オイルポンプ |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6511730B2 (ja) * | 2014-05-23 | 2019-05-15 | 株式会社ジェイテクト | ポンプ |
JP6649906B2 (ja) | 2017-01-17 | 2020-02-19 | 株式会社オティックス | オイルポンプ |
US20190032657A1 (en) * | 2017-07-31 | 2019-01-31 | Nidec Tosok Corporation | Electric oil pump |
JP7144652B2 (ja) | 2019-03-26 | 2022-09-30 | 豊田合成株式会社 | オイルポンプ |
-
2021
- 2021-04-13 JP JP2021067626A patent/JP2022162691A/ja active Pending
-
2022
- 2022-02-02 US US18/274,207 patent/US20240084799A1/en active Pending
- 2022-02-02 WO PCT/JP2022/003925 patent/WO2022219886A1/ja active Application Filing
- 2022-02-02 CN CN202280011123.8A patent/CN116745528A/zh active Pending
- 2022-02-02 DE DE112022002136.5T patent/DE112022002136T5/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001182669A (ja) * | 1999-12-27 | 2001-07-06 | Mikuni Adec Corp | トロコイドポンプ |
JP2018127978A (ja) * | 2017-02-09 | 2018-08-16 | アイシン精機株式会社 | 電動ポンプ |
JP2019027432A (ja) * | 2017-07-31 | 2019-02-21 | 日本電産トーソク株式会社 | 電動オイルポンプ |
WO2019225425A1 (ja) * | 2018-05-21 | 2019-11-28 | Ntn株式会社 | 電動オイルポンプ |
Also Published As
Publication number | Publication date |
---|---|
US20240084799A1 (en) | 2024-03-14 |
CN116745528A (zh) | 2023-09-12 |
JP2022162691A (ja) | 2022-10-25 |
DE112022002136T5 (de) | 2024-04-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7290995B2 (en) | Tandem type trochoid pump and method of assembling the same | |
JPH1082377A (ja) | 電動ポンプ及びドライブジョイント | |
US20130280041A1 (en) | Oil pump | |
JP5878786B2 (ja) | オイルポンプ | |
WO2018062198A1 (ja) | 歯車ポンプ又は歯車モータ | |
WO2022219886A1 (ja) | ポンプ装置 | |
US6071099A (en) | Scroll compressor having a discharge muffler | |
JP2007218128A (ja) | ギヤポンプ | |
KR101948228B1 (ko) | 하우징 일체형 분리판을 갖는 지로터 펌프 | |
WO2020203025A1 (ja) | カートリッジ式ベーンポンプ、及びポンプ装置 | |
JP6745132B2 (ja) | 複合ポンプ | |
EP3521621B1 (en) | Internally rotating gear pump | |
US20060292025A1 (en) | Electric internal gear pump | |
JP2004028005A (ja) | 内接歯車式オイルポンプおよびこれを備えた自動変速機 | |
CN112576498B (zh) | 齿轮泵 | |
US20120082581A1 (en) | Gear pump | |
JP6162434B2 (ja) | オイルポンプ | |
JP2006170149A (ja) | タンデム型オイルポンプ | |
JP2002202070A (ja) | ギヤポンプ | |
JP2003278670A (ja) | 電動オイルポンプ | |
JP2004204695A (ja) | 電動内接ギヤポンプ | |
JP2021063455A (ja) | 歯車ポンプ又は歯車モータ | |
JP2004027908A (ja) | オイルポンプ | |
JP2527249Y2 (ja) | オイルポンプ | |
JPH0744778Y2 (ja) | オイルポンプ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22787814 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280011123.8 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18274207 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112022002136 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22787814 Country of ref document: EP Kind code of ref document: A1 |