EP3839208B1 - Pump device - Google Patents
Pump device Download PDFInfo
- Publication number
- EP3839208B1 EP3839208B1 EP21156611.2A EP21156611A EP3839208B1 EP 3839208 B1 EP3839208 B1 EP 3839208B1 EP 21156611 A EP21156611 A EP 21156611A EP 3839208 B1 EP3839208 B1 EP 3839208B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pump device
- rotor
- accommodation
- exposure
- 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.)
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- 230000005540 biological transmission Effects 0.000 claims description 7
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- 238000007789 sealing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 108700026963 CB1a Proteins 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 230000000644 propagated effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- 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
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
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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
- F04C15/0096—Heating; Cooling
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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
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
- F04C2230/601—Adjustment
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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
- F04C2230/00—Manufacture
- F04C2230/60—Assembly methods
- F04C2230/603—Centering; Aligning
-
- 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
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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
- F04C2240/40—Electric motor
Definitions
- the present disclosure relates to a pump device.
- the electric pump for example, a portion of the electric pump is inserted into a mounting hole provided on a casing, and a flange portion of a case is fixed to an outer surface of the casing of the automatic transmission. As a result, the electric pump is mounted on the automatic transmission.
- the electric pump has an inlet port and an outlet port.
- a hydraulic path is provided to an inner surface of the mounting hole, and the inlet port and the outlet port of the electric pump are connected to the hydraulic path.
- An O-ring and other elements are provided to a connection point between the inlet port and the hydraulic path, and to a connection point between the outlet port and the hydraulic path.
- a vibration of the automatic transmission is delivered to the electric pump through the flange portion.
- the vibration delivered to the electric pump is propagated being amplified as it goes away from the flange portion.
- the vibration of the automatic transmission is easily delivered to the inlet port and the outlet port connected to the hydraulic path provided on the inner surface of the mounting hole in a greatly amplified manner. Accordingly, the O-ring and other elements provided to the connection point may easily wear out due to friction.
- US 2013/0189134 A1 describes a metal pump housing which includes a shaft support hole for supporting a metal part of a rotary shaft.
- the rotary shaft includes a first end on which a pump operating portion is provided and a second end on which a motor rotor is provided.
- a metal motor case is fixed to a part of the pump housing that is at a side of the second end.
- the motor case accommodates a motor section including a motor stator and a motor rotor.
- a plastic circuit case member is fixed to a part of the motor case that is opposite to the part to which the pump housing is fixed.
- a circuit substrate for controlling the motor section is fixed to the circuit case member and is separate from the motor case.
- US 2004/0184942 A1 describes a gerotor pump which comprises laterally constrained floating rings, thereby providing an orthogonal degree-of-freedom and allowing gerotor sets positioned therein to establish their own preferred mesh orientation.
- the outer rotor of the gerotor set is forcibly positioned against the inner rotor of the gerotor set and the gerotor set sets in-mesh position whereat there is little relative motion between the inner and outer rotors, thereby resulting in a substantially friction-and wear-free meshing action of the gerotor set.
- one of the objectives of an exemplary embodiment of the present invention is to provide a pump device having a structure that is capable of preventing vibration from being delivered to the inlet port and the outlet port.
- One embodiment of the present invention is an arrangement comprising a component of a vehicle and a pump device suitable to be mounted in the vehicle, the pump device comprising: a motor portion having a shaft having a center thereof on an axially extending center axis, a rotor which is fixed to the shaft, and a stator which is arranged on a radially outer side of the rotor, wherein the axis includes a first axial side and a second axial side opposite to the first axial side; a pump portion which is arranged on the first axial side of the motor portion, and driven by the motor portion; a case having a lid portion which is arranged on the second axial side of the motor portion, a tube body including a first tube portion arranged on the lid portion and a second tube portion arranged on the first tube portion at the first axial side, and a flange portion arranged between the first tube portion and second tube portion and extending radially outward from the tube body; the pump portion including: an inner rotor which is attached
- a positive side (+Y side) of the Y-axis direction may be referred to as 'counter-output side (the other axial side),' and a negative side (-Y side) of the Y-axis direction may be referred to as 'output side (one axial side).
- a direction parallel to the center axis J (Y-axis direction) may be simply referred to as ⁇ axial direction
- a radial direction having its center on the center axis J may be simply referred to as 'radial direction
- a circumferential direction ( ⁇ Y direction) having its center on the center axis J that is, the axial circumference of center axis J, may be simply referred to as 'circumferential direction.
- references to a case of strictly being extended in the axial direction but it may also include a case of being extended in a direction inclined at less than 45° relative to the axial direction.
- descriptions such as being ⁇ radially extended' do not only refer to a case of strictly being extended in the radial direction, that is, the direction perpendicular to the axial direction, but it may also include a case of being extended in a direction inclined at less than 45° relative to the radial direction.
- FIG. 1 is a cross-sectional view of a pump device 10 according to the first embodiment. As shown in FIG. 1 , the pump device 10 is fixed to a car body CB1.
- the car body CB1 is a component of a vehicle.
- the car body CB1 is not particularly limited, and therefore may be, for example, an automatic transmission.
- descriptions such as 'accommodating' a subject do not only refer to a case of strictly accommodating the entire subject, but it may also include a case of partially accommodating a portion of the subject. That is, for example, when it is described that 'the case 11 accommodates both the motor portion 20 and the pump portion 30,' a portion of the motor portion 20 and a portion of the pump portion 30 may still be arranged outside the case 11.
- the housing 12 has a cylindrical or substantially cylindrical shape, and holds the motor portion 20 and the pump portion 30 therein.
- the housing 12 extends in the axial direction (Y-axis direction).
- the housing 12 is made of, for example, metal.
- the housing 12 is formed by, for example, press processing. Yet, the housing 12 and a method of forming the housing 12 are not limited to a particular type.
- the housing 12 preferably has a housing tube portion 14, a housing flange portion 15 and an extending portion 16.
- the housing tube portion 14 has a tubular shape, and covers at least a radially outer side of a stator 50, which will be described in detail in a subsequent section.
- the housing tube portion 14 has, for example, a multi-stepped cylindrical shape having its center on the center axis J.
- the housing tube portion 14 is open toward both axial sides ( ⁇ Y side).
- a diameter of the housing tube portion 14 gradually decreases from the counter-output side (+Y side) toward the output side (-Y side).
- the housing flange portion 15 extends radially outward from an end portion on the counter-output side (+Y side) of the housing tube portion 14.
- the extending portion 16 extends radially inward from an end portion on the output side (-Y side) of the housing tube portion 14.
- the cover flange portion 19 extends radially outward from an end portion on the output side (-Y side) of the cover tube portion 17. A surface on the output side of the cover flange portion 19 is in contact with a surface on the counter-output side (+Y side) of the housing flange portion 15.
- the cover flange portion 19 and the housing flange portion 15 are axially (Y-axis direction) fixed by, for example, caulking. With this, the housing 12 is fixed to the motor cover 13.
- the motor portion 20 preferably has a shaft 41, a counter-output side bearing 44, a rotor 40, the stator 50, the bus bar unit 80, a circuit board 70, a rotation sensor 71 and a sensor magnet 72.
- the stator 50 is arranged on a radially outer side of the rotor 40.
- the stator 50 preferably has a stator core 51, an insulating member 52 and a coil 53.
- the stator core 51 preferably has a core back portion 51a and a plurality of teeth portions 51b.
- the core back portion 51a has, for example, a cylindrical or substantially cylindrical shape which is concentric with the shaft 41.
- the core back portion 51a is fixed to an inner circumferential surface of the housing tube portion 14.
- the plurality of teeth portions 51b extend from an inner surface of the core back portion 51a toward the shaft 41.
- the plurality of teeth portions 51b is arranged at equal intervals along the circumferential direction.
- the teeth portions 51b radially face the rotor magnet 43.
- the holder main body portion 82 has a holding portion at the center portion thereof, for holding the counter-output side bearing 44.
- the connector portion 83 protrudes radially outward from the holder main body portion 82. As shown in FIG. 1 , the connector portion 83 protrudes downward (-Z side) from the holder main body portion 82.
- the connector portion 83 has a connector concave portion 83a which is open toward the lower side and recessed toward the upper side.
- the connector portion 83 is connected to an outside power supply which is not illustrated in the drawings.
- the through-hole 31a axially (Y-axis direction) penetrates the pump body 31.
- the shaft 41 passes through the through-hole 31a.
- An end portion on the counter-output side (+Y side) of the through-hole 31a is open toward the oil seal holding portion 31b.
- An end portion on the output side (-Y side) of the through-hole 31a is open toward the pump chamber 33.
- an opening edge of the through-hole 31a has, for example, a circular or substantially circular shape that is concentric with the pump chamber 33. Yet, when seen in the axial direction, the opening edge of the through-hole 31a does not necessarily need to have a circular shape.
- the exposure portion 34 radially overlaps with the pump chamber 33.
- the outer circumferential surface 34a of the exposure portion 34 has a pump body side concave portion 34b which is recessed radially inward.
- the pump body side concave portion 34b axially extends on the outer circumferential surface 34a.
- an opening of the pump body side concave portion 34b has a rectangular or substantially rectangular shape.
- the pump body side concave portion 34b is provided to the exposure portion 34, for example, throughout the entire axial direction. Yet, when seen in the axial direction (Y-axis direction), the opening of the body pump side concave portion 34b is not necessarily limited to a rectangular shape.
- An O-ring 38 is arranged in a radial between the pump body 31 and the housing tube portion 14, and covers the entire circumference of the gap in the circumferential direction.
- the shaft 41 is attached to the inner rotor 61. Specifically, an end portion on the output side (-Y side) of the shaft 41 is fixed to the inner rotor 61.
- the inner rotor 61 is accommodated inside the pump chamber 33. The inner rotor 61 rotates around the center axis J ( ⁇ Y direction) with the rotation of the shaft 41.
- the pump cover 32 is attached to the output side (-Y side) of the pump body 31.
- the pump cover 32 is fixed to a surface on the output side of the exposure portion 34 of the pump body 31 by a screw 94.
- the pump cover 32 covers the output side (-Y side) of the pump chamber 33.
- the pump cover 32 preferably has a pump cover main body portion 32c and a protrusion portion 32d. Yet, the pump cover 32 may be fixed to the surface on the output side of the exposure portion 34 of the pump body 31 by other methods.
- a surface on the counter-output side (+Y side) of the pump cover main body portion 32c is in contact with a surface on the output side (-Y side) of the pump body 31.
- the protrusion portion 32d protrudes toward the output side from the pump cover main body portion 32c.
- Another method of accurately forming an outer surface of the housing 12 may be considered, by when the housing 12 is manufactured by performing additional processing on an outer surface of the housing 12 after manufacturing the housing 12 by press processing. This method is also capable of fitting the outer surface of the housing 12 into the fitting portion BD1b in a highly precise manner.
- the pump body 31 is manufactured by performing cutting work, or the like, on a metal member. Therefore, by performing cutting work when manufacturing the pump body 31, it is possible to accurately form the outer circumferential surface 34a of the exposure portion 34. That is, in the process of manufacturing the pump body 31 by cutting work, by performing an additional process on the pump body 31 which has been already cut by lathe-chuck processing, or the like, it is possible to accurately form the outer peripheral surface 34a on the pump body 31.
- the pump cover main body portion 32c is fitted into the fitting portion BD1b to support the pump device 10, in order to suppress the propagation of vibrations of the car body CB1.
- the pump cover 32 is attached to the pump body 31 by the screw 94. Therefore, as compared with the pump body 31, it is more likely that an assembly error may occur between the pump cover 32 and the housing 12. Thus, the pump cover body 32c may not be fitted into the fitting portion BD1b in a highly precise manner.
- the cover pump 32 is attached to the exposure portion 34. Also, the pump cover 32 is attached to the exposure portion 34 after the pump body 31 is fixed inside the housing 12. For this reason, the order of assembly of the pump device 10 may be arbitrarily changed, and the assembly of the pump device 10 may be easily performed. Further, after the pump device 10 is assembled, the pump cover 32 may be removed from the pump device 10. With this, it is possible to exchange the inner rotor 61 and the outer rotor 62 inside the pump chamber 33, and thereby the maintenance of the pump device 10 may be easily performed.
- the exposure portion 34 radially overlaps with the pump chamber 33. For this reason, it is possible to support the inner rotor 61 and the outer rotor 62, which are accommodated inside the pump chamber 33, by fitting a radially outer portion thereof into the fitting portion BD1b. Accordingly, it is possible to prevent the vibration due to the rotation of the inner rotor 61 and outer rotor 62 from being delivered to the inlet 32a and the outlet 32b. As a result, it is also possible to further prevent the O-ring 37 from wearing off.
- the exposure portion 34 radially overlaps with the pump chamber 33, it is possible to suppress the size increase of a portion of the pump body 31 protruding toward the output side (-Y side) from the housing 12. Therefore, according to this embodiment, it is possible to suppress the axial size increase in the pump device 10.
- the pump body 31 has the bearing portion 36 which supports the shaft 41. Therefore, by fitting the pump body 31 into the fitting portion BD1b in a highly precise manner, it is possible to attach the pump device 10 to the car body CB1 with a high axis precision of the shaft 41.
- the pump body side concave portion 34b radially faces the car body side convex portion CB1a.
- the pump body side concave portion 34b and the car body side convex portion CB1a may be, for example, fittingly engaged with each other. With this structure, it is possible to determine the relative circumferential position of the exposure portion 34 to the car body CB1 in a highly precise manner.
- the description of 'the pump body side concave portion which is disposed on the outer circumferential surface of the exposure portion and recessed radially inward' includes a portion on a radially inner side from the cylindrical outer circumferential surface of the exposure portion.
- the plurality of exposure portions 34 are arranged along the circumferential direction.
- the plurality of exposure portions 34 surround a radially outer side of the center axis J. That is, an outer surface on the radially outer side of the plurality of exposure portions 34 surround the radially outer side of the center axis J.
- the exposure portion 34 may not radially overlap with the pump chamber 33.
- the exposure portion 34 may be arranged on the output side (-Y side) or the counter-output side (+Y side) from the pump chamber 33.
- the type of fitting performed between the exposure portion 34 and the fitting portion BD1b is not particularly limited, and may be, for example, interference fitting.
- the structure of the position adjustment portion PA1 is not particularly limited, and may employ, for example, the structure shown in FIG. 3 and FIG. 4 .
- FIG. 3 is a cross-sectional view of a portion of another example of a pump device 110 according to this embodiment.
- the pump device 110 is attached to a car body CB2.
- the pump device 110 includes a pump portion 130.
- the pump portion 130 has a pump body 131.
- the pump body 131 has an exposure portion 134.
- the car body side convex portion CB2a is arranged on an inner circumferential surface of the fitting portion BD2b, and protrudes radially inward. As shown in FIG. 3 , when seen in the axial direction (Y-axis direction), the car body side convex portion CB2a has a partially linearly notched circular shape.
- the pump body side convex portion 234b radially faces the car body side concave portion CB3a. As shown in the example of FIG. 4 , the pump body side convex portion 234b is fitted into the car body side concave portion CB3a. With this, a relative circumferential position between the exposure portion 234 and the car body CB3 is determined by the position adjustment portion PA3. Further, when seen in the axial direction (Y-axis direction), the pump side convex portion 234b may have a shape other than the rectangular shape, as long as it can be fitted into the car body side concave portion CB3a. Other elements of the pump device 210 are identical to those of the pump device 10 shown in FIG. 1 and FIG. 2 . Other elements of the car body CB3 are identical to those of the car body CB1 shown in FIG. 1 and FIG. 2 .
- the pump portion 330 preferably has a pump body 331, a pump cover 32, an inner rotor 61 and an outer rotor 62.
- the pump body 331 has an exposure portion 334.
- the car body CB4 has a pump device accommodation portion BD4.
- the pump device accommodation portion BD4 preferably has an accommodation main body portion BD4a and a fitting portion BD4b.
- the exposure portion 334 is fitted into the fitting portion BD4b.
- the accommodation main body portion BD4a is identical to the accommodation main body portion BD1a of the first embodiment.
- a surface on a radially inner side of the fitting portion BD4b is provided with radially outwardly recessed fitting portion side grooves CB4a, CB4b.
- the fitting portion side grooves CB4a, CB4b extend in the axial direction (Y-axis direction).
- the fitting portion side grooves CB4a, CB4b have a shape that is, for example, identical to the car body side concave portion CB3a.
- the fitting portion side groove CB4a is arranged on a lower (-Z side) end portion of a radially inner side surface of the fitting portion BD4b.
- the fitting portion side groove CB4b is arranged on an upper (+Z side) end portion of a radially inner side surface of the fitting portion BD4b.
- the exposure portion side groove 334c radially faces the fitting portion side groove CB4b. Accordingly, the exposure portion side groove 334c and the fitting portion side groove CB4b define the flow channel FC2. That is, the exposure portion side groove 334c defines at least a portion of the flow channel FC2. The fitting portion side groove CB4b defines at least a portion of the flow channel FC2.
- a method of mounting the pump device of this embodiment onto the car body is not particularly limited to the above-described method.
- the pump device of this embodiment may be, for example, mounted onto the car body in a state in which the exposure portion is not fitted into the fitting portion of the car body.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Rotary Pumps (AREA)
Description
- The present disclosure relates to a pump device.
- In the past, an electric pump has been mounted on an automatic transmission (for example,
JP Patent Application Publication No. 2011-94553 - In the above-described electric pump, for example, a portion of the electric pump is inserted into a mounting hole provided on a casing, and a flange portion of a case is fixed to an outer surface of the casing of the automatic transmission. As a result, the electric pump is mounted on the automatic transmission. The electric pump has an inlet port and an outlet port. A hydraulic path is provided to an inner surface of the mounting hole, and the inlet port and the outlet port of the electric pump are connected to the hydraulic path. An O-ring and other elements are provided to a connection point between the inlet port and the hydraulic path, and to a connection point between the outlet port and the hydraulic path.
- A vibration of the automatic transmission is delivered to the electric pump through the flange portion. The vibration delivered to the electric pump is propagated being amplified as it goes away from the flange portion. For this reason, the vibration of the automatic transmission is easily delivered to the inlet port and the outlet port connected to the hydraulic path provided on the inner surface of the mounting hole in a greatly amplified manner. Accordingly, the O-ring and other elements provided to the connection point may easily wear out due to friction.
-
US 2013/0189134 A1 describes a metal pump housing which includes a shaft support hole for supporting a metal part of a rotary shaft. The rotary shaft includes a first end on which a pump operating portion is provided and a second end on which a motor rotor is provided. A metal motor case is fixed to a part of the pump housing that is at a side of the second end. The motor case accommodates a motor section including a motor stator and a motor rotor. A plastic circuit case member is fixed to a part of the motor case that is opposite to the part to which the pump housing is fixed. A circuit substrate for controlling the motor section is fixed to the circuit case member and is separate from the motor case. -
US 2014/0241917 A1 describes an electric oil pump which is coupled to a pump receptacle including an oil inflow passage and an oil outflow passage. The electric oil pump includes a motor, a pump rotor and a housing. The electric oil pump also includes a check valve. The housing accommodates the motor and the pump rotor. The housing encloses an opening of the pump receptacle and includes at least a fitted portion fitted into the pump receptacle. An oil compartment is formed between the pump receptacle and the housing. Oil flows into the oil compartment from the oil inflow passage when the pump rotor is rotated. The fitted portion is partially immersed in the oil collected in the oil compartment. The housing includes a suction port and a discharge port. A check valve, located in the housing, limits reversed flow of the oil from the oil compartment to the oil inflow passage. -
US 2004/0184942 A1 describes a gerotor pump which comprises laterally constrained floating rings, thereby providing an orthogonal degree-of-freedom and allowing gerotor sets positioned therein to establish their own preferred mesh orientation. The outer rotor of the gerotor set is forcibly positioned against the inner rotor of the gerotor set and the gerotor set sets in-mesh position whereat there is little relative motion between the inner and outer rotors, thereby resulting in a substantially friction-and wear-free meshing action of the gerotor set. - In consideration of the above-described technical problem, one of the objectives of an exemplary embodiment of the present invention is to provide a pump device having a structure that is capable of preventing vibration from being delivered to the inlet port and the outlet port.
- One embodiment of the present invention is an arrangement comprising a component of a vehicle and a pump device suitable to be mounted in the vehicle, the pump device comprising: a motor portion having a shaft having a center thereof on an axially extending center axis, a rotor which is fixed to the shaft, and a stator which is arranged on a radially outer side of the rotor, wherein the axis includes a first axial side and a second axial side opposite to the first axial side; a pump portion which is arranged on the first axial side of the motor portion, and driven by the motor portion; a case having a lid portion which is arranged on the second axial side of the motor portion, a tube body including a first tube portion arranged on the lid portion and a second tube portion arranged on the first tube portion at the first axial side, and a flange portion arranged between the first tube portion and second tube portion and extending radially outward from the tube body; the pump portion including: an inner rotor which is attached to the shaft; an annular outer rotor which surrounds a radially outer side of the inner rotor; a pump body which accommodates the inner rotor and the outer rotor; and a pump cover which is attached to the pump body at the first axial side, wherein the pump body has a pump chamber which is recessed from a surface on the first axial side toward the second axial side and accommodates the inner rotor and the outer rotor, and a through-hole which axially penetrates through the pump body and through which the shaft passes, wherein the pump cover has an inlet and an outlet which are in communication with the pump chamber, wherein a surface of the flange portion at the first axial side is in contact with a surface of the component of the vehicle and the pump device is mounted to the component via the flange portion, wherein the component has a pump device accommodation portion which is recessed from the surface toward the first axial side, wherein the pump device accommodation portion has an accommodation main body portion and a fitting portion, wherein at least a portion of the motor portion is arranged in a radially inner side of the accommodation main body portion opening toward the surface, and the fitting portion which is arranged on the accommodation main body portion at the first side is fitted with the pump body.
- The above and other elements, features, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments with reference to the attached drawings.
- Embodiments will now be described, by way of example only, with reference to the accompanying drawings which are meant to be exemplary, not limiting, and wherein like elements are numbered alike in several Figures, in which:
-
FIG. 1 is a cross-sectional view of a pump device according to the first embodiment. -
FIG. 2 illustrates a portion of the pump device according to the first embodiment, and corresponds to a cross-sectional view taken along the II-II line shown inFIG. 1 . -
FIG. 3 is a cross-sectional view of a portion of another example of the pump device according to the first embodiment. -
FIG. 4 is a cross-sectional view of a portion of another example of the pump device according to the first embodiment. -
FIG. 5 is a cross-sectional view of a portion of a pump device according to the second embodiment. -
FIG. 6 illustrates a portion of the pump device according to the second embodiment, and corresponds to a cross-sectional view taken along the VI-VI line shown inFIG. 5 . - Hereinafter, a pump device according to the preferred embodiments of the present invention will be explained with reference to the accompanying drawings. Further, each structure illustrated in the following drawings may be different in its scale, the number of members thereof, etc., from those in an actual pump device or members, for better understanding of each component.
- In the drawings, an X-Y-Z coordinate system is provided as a suitable three-dimensional orthogonal coordinate system. In the X-Y-Z coordinate system, a direction parallel to the axial direction of a center axis J shown in
FIG. 1 is referred to as Y-axis direction. A vertical direction ofFIG. 1 , that is, a direction orthogonal to the Y-axis direction, is referred to as Z-axis direction. A direction orthogonal to both the Y-axis direction and the Z-axis direction is referred to as X-axis direction. - In the following description, a Z-axis direction that is orthogonal to a direction in which the center axis J extends is referred to as vertical direction. That is, a positive side (+Z side) of the Z-axis direction may be referred to as `upper side,' and a negative side (-Z side) of the Z-axis may be referred to as 'lower side.' Further, it is to be understood that the descriptions of the vertical direction, the upper side and the lower side are used for explanation only, and they do not limit the actual positional relation or direction.
- In the following description, a positive side (+Y side) of the Y-axis direction may be referred to as 'counter-output side (the other axial side),' and a negative side (-Y side) of the Y-axis direction may be referred to as 'output side (one axial side).' Also, unless otherwise explained, a direction parallel to the center axis J (Y-axis direction) may be simply referred to as `axial direction,' a radial direction having its center on the center axis J may be simply referred to as 'radial direction,' and a circumferential direction (θY direction) having its center on the center axis J, that is, the axial circumference of center axis J, may be simply referred to as 'circumferential direction.'
- Further, herein, descriptions such as being 'axially extended' do not only refer to a case of strictly being extended in the axial direction, but it may also include a case of being extended in a direction inclined at less than 45° relative to the axial direction. Also, descriptions such as being `radially extended' do not only refer to a case of strictly being extended in the radial direction, that is, the direction perpendicular to the axial direction, but it may also include a case of being extended in a direction inclined at less than 45° relative to the radial direction.
-
FIG. 1 is a cross-sectional view of apump device 10 according to the first embodiment. As shown inFIG. 1 , thepump device 10 is fixed to a car body CB1. The car body CB1 is a component of a vehicle. The car body CB1 is not particularly limited, and therefore may be, for example, an automatic transmission. - The
pump device 10 includes acase 11, amotor portion 20 and apump portion 30. Thecase 11 accommodates themotor portion 20 and thepump portion 30 therein. Thecase 11 has ahousing 12 and amotor cover 13. That is, thepump device 10 includes thehousing 12 and themotor cover 13. - In the following description, descriptions such as 'accommodating' a subject do not only refer to a case of strictly accommodating the entire subject, but it may also include a case of partially accommodating a portion of the subject. That is, for example, when it is described that 'the
case 11 accommodates both themotor portion 20 and thepump portion 30,' a portion of themotor portion 20 and a portion of thepump portion 30 may still be arranged outside thecase 11. - The
housing 12 has a cylindrical or substantially cylindrical shape, and holds themotor portion 20 and thepump portion 30 therein. Thehousing 12 extends in the axial direction (Y-axis direction). Thehousing 12 is made of, for example, metal. Thehousing 12 is formed by, for example, press processing. Yet, thehousing 12 and a method of forming thehousing 12 are not limited to a particular type. - The
housing 12 preferably has ahousing tube portion 14, ahousing flange portion 15 and an extendingportion 16. Thehousing tube portion 14 has a tubular shape, and covers at least a radially outer side of astator 50, which will be described in detail in a subsequent section. Thehousing tube portion 14 has, for example, a multi-stepped cylindrical shape having its center on the center axis J. Thehousing tube portion 14 is open toward both axial sides ( ±Y side). A diameter of thehousing tube portion 14 gradually decreases from the counter-output side (+Y side) toward the output side (-Y side). - The
housing flange portion 15 extends radially outward from an end portion on the counter-output side (+Y side) of thehousing tube portion 14. The extendingportion 16 extends radially inward from an end portion on the output side (-Y side) of thehousing tube portion 14. - The
motor cover 13 is fixed to the counter-output side (+Y side) of thehousing 12. Themotor cover 13 preferably has acover tube portion 17, alid portion 18 and acover flange portion 19. Thecover tube portion 17 has a tubular shape, and covers a radially outer side of abus bar unit 80, which will be described in detail in a subsequent section. Thelid portion 18 is connected to the counter-output side (+Y side) of thecover tube portion 17. Thelid portion 18 has, for example, a planar shape. Thelid portion 18 is arranged on the counter-output side from thebus unit 80. Thelid portion 18 covers an opening on the counter-output side of a holdermain body portion 82, which will be described in detail in a subsequent section. - The
cover flange portion 19 extends radially outward from an end portion on the output side (-Y side) of thecover tube portion 17. A surface on the output side of thecover flange portion 19 is in contact with a surface on the counter-output side (+Y side) of thehousing flange portion 15. Thecover flange portion 19 and thehousing flange portion 15 are axially (Y-axis direction) fixed by, for example, caulking. With this, thehousing 12 is fixed to themotor cover 13. - The
motor portion 20 preferably has ashaft 41, a counter-output side bearing 44, arotor 40, thestator 50, thebus bar unit 80, acircuit board 70, arotation sensor 71 and asensor magnet 72. - The
shaft 41 extends along the axially (Y-axis direction) extending center axis J. An end portion on the output side (-Y side) of theshaft 41 extends from themotor portion 20 to thepump portion 30. Theshaft 41 is rotatably supported by the counter-output side bearing 44 and a bearingportion 36 of thepump body 31, which will be described in detail in a subsequent section, and rotates around the axis in the circumferential direction (±θY direction). - The counter-output side bearing 44 is arranged on the counter-output side (+Y side) from the
stator 50. In this embodiment, the counter-output side bearing 44 is a ball-and-roller bearing. The counter-output side bearing 44 is held by abus bar holder 81 of thebus bar unit 80, which will be described in detail in a subsequent section. Further, a bearing other than the ball-and-roller type may be used as thecounter-output side bearing 44. - The
shaft 41 is fixed to therotor 40. Therotor 40 preferably has arotor core 42 and arotor magnet 43. Therotor core 42 preferably has an axially penetrating through-hole and at least a portion of an end portion on the counter-output side (+Y side) of theshaft 41 is arranged in the through-hole. That is, therotor core 42 surrounds theshaft 41 in the circumferential direction (θY direction), and theshaft 41 is fixed to therotor core 42. Therotor magnet 43 is fixed to an outer surface along a circumference of therotor core 42. Therotor core 42 and therotor magnet 43 integrally rotate with theshaft 41. Yet, therotor magnet 43 does not necessarily need to be fixed to an outer surface of therotor 42. At least a portion of therotor magnet 43 may be embedded in therotor core 42. - The
stator 50 is arranged on a radially outer side of therotor 40. Thestator 50 preferably has astator core 51, an insulatingmember 52 and acoil 53. Thestator core 51 preferably has a core backportion 51a and a plurality ofteeth portions 51b. - The core back
portion 51a has, for example, a cylindrical or substantially cylindrical shape which is concentric with theshaft 41. The core backportion 51a is fixed to an inner circumferential surface of thehousing tube portion 14. The plurality ofteeth portions 51b extend from an inner surface of the core backportion 51a toward theshaft 41. The plurality ofteeth portions 51b is arranged at equal intervals along the circumferential direction. Theteeth portions 51b radially face therotor magnet 43. - The insulating
member 52 is provided to each of theteeth portions 51b. Thecoil 53 is provided to each of the teeth portions via the insulatingmember 52. Thecoil 53 is formed by winding up an electrically conductive wire. - The
bus bar unit 80 is arranged on the counter-output side (+Y side) of thestator 50. Thebus bar unit 80 preferably has thebus bar holder 81, aphase bus bar 90 and a sensor bus bar 91. - The
bus bar holder 81 holds thephase bus bar 90 and the sensor bus bar 91. Thebus bar holder 81 preferably has a holdermain body portion 82 and aconnector portion 83. The holdermain body portion 82 has a cylindrical or substantially cylindrical shape that is concentric with theshaft 41. The holdermain body portion 82 is arranged on anopening 14a on the counter-output (+Y side) of thehousing tube portion 14. An end portion on the output side (-Y side) of the holdermain body portion 82 is arranged on a radially inner side of thehousing tube portion 14. An O-ring 84 is arranged between the holdermain body portion 82 and thehousing tube portion 14. That is, the O-ring 84 covers the entire circumference of a radial gap between the housingmain body portion 82 and thehousing tube portion 14 in the circumferential direction. - An opening on the counter-output side (+Y side) of the holder
main body portion 82 is closed up by thelid portion 18. An O-ring 85 is arranged between a surface on the counter-output side of the holdermain body portion 82 and thelid portion 18. The O-ring 85 covers the entire circumference of an opening on the counter-output side of the holdermain body portion 82 in the circumferential direction. - The holder
main body portion 82 has a holding portion at the center portion thereof, for holding thecounter-output side bearing 44. Theconnector portion 83 protrudes radially outward from the holdermain body portion 82. As shown inFIG. 1 , theconnector portion 83 protrudes downward (-Z side) from the holdermain body portion 82. Theconnector portion 83 has a connectorconcave portion 83a which is open toward the lower side and recessed toward the upper side. Theconnector portion 83 is connected to an outside power supply which is not illustrated in the drawings. - The
phase bus bar 90 is electrically connected to thecoil 53. The sensor bus bar 91 is electrically connected to thecircuit board 70. One end of thephase bus bar 90 and one end of the sensor bus bar 91 protrude downward (-Z side) from a bottom surface of the connectorconcave portion 83a. - The
circuit board 70 is fixed to the holdermain body portion 82. Thecircuit board 70 is accommodated on a radially inner side of the holdermain body portion 82. As shown inFIG. 1 , a substrate surface of thecircuit bard 70 is orthogonal to the axial direction (Y-axis direction). Yet, the substrate surface of thecircuit board 70 does not necessarily need to be orthogonal to the axial direction (Y-axis direction). - The
rotation sensor 71 is attached to a surface on the output side (-Y side) of thecircuit board 70. Therotation sensor 71 is, for example, a hall element. Therotation sensor 71 axially (Y-axis direction) faces thesensor magnet 72. Yet, a sensor other than the hall element type may be used as therotation sensor 71. - The
sensor magnet 72 is fixed to theshaft 41. As shown inFIG. 1 , thesensor magnet 72 is fixed to an outer circumferential surface of an end portion on the counter-output side (+Y side) of theshaft 41 via a mounting member. Thesensor magnet 72 has, for example, an annular or substantially annular shape. Magnetic poles of thesensor magnet 72 are provided such that N-poles and S-poles are alternately arranged along the circumferential direction. - The
pump portion 30 is arranged on the output side (-Y side) of themotor portion 20. Thepump portion 30 is driven by themotor portion 20. Thepump portion 30 preferably has apump body 31, apump cover 32, aninner rotor 61 and anouter rotor 62. - The
pump body 31 is fixed on an inner surface of thehousing tube portion 14. Thepump body 31 is made of, for example, metal. Thepump body 31 is formed by, for example, cutting work. Thepump body 31 preferably has apump chamber 33, an oilseal holding portion 31b, a through-hole 31a, a bearingportion 36 and anexposure portion 34. Yet, thepump body 31 may be made of a material other than metal, and may be formed by a processing method other than cutting work. - The
pump chamber 33 is recessed from a surface on the output side (-Y side) of thepump body 31 toward the counter-output side (+Y side). Thepump chamber 33 accommodates the inner rotor 661 and theouter rotor 62 on an inner side thereof. That is, thepump body 31 accommodates theinner rotor 61 and theouter rotor 62. The output side (-Y side) of thepump chamber 33 is closed by thepump cover 32. -
FIG. 2 illustrates a portion of thepump device 10 in this embodiment, and corresponds to a cross-sectional view taken along II-II shown inFIG. 1 . Theshaft 41, theinner rotor 61 and theouter rotor 62 is not illustrated inFIG. 2 . As shown inFIG. 2 , when seen in the axial direction (Y-axis direction), an opening portion of thepump chamber 33 has a circular or substantially circular shape. As shown inFIG. 2 , the center axis J passes through the center of thepump chamber 33. Further, when seen in the axial direction, the opening portion of thepump chamber 33 does not necessarily need to have a circular shape, and it may have other shapes such as a polygonal shape, or the like. - As shown in
FIG. 1 , the oilseal holding portion 31b is recessed from a surface on the counter-output side (+Y side) of thepump body 31 toward the output side (-Y side). Anoil seal 92 is held in the oilseal holding chamber 31b. Theoil seal 92 prevents oil that is introduced into the oilseal holding portion 31b from thepump chamber 33 via the through-hole 31a from advancing into themotor portion 20. - The through-
hole 31a axially (Y-axis direction) penetrates thepump body 31. Theshaft 41 passes through the through-hole 31a. An end portion on the counter-output side (+Y side) of the through-hole 31a is open toward the oilseal holding portion 31b. An end portion on the output side (-Y side) of the through-hole 31a is open toward thepump chamber 33. As shown inFIG. 2 , when seen in the axial direction, an opening edge of the through-hole 31a has, for example, a circular or substantially circular shape that is concentric with thepump chamber 33. Yet, when seen in the axial direction, the opening edge of the through-hole 31a does not necessarily need to have a circular shape. - As shown in
FIG. 1 , the bearingportion 36 supports theshaft 41. In this embodiment, the bearingportion 36 is a slide bearing. As shown inFIG. 1 , the bearingportion 36 is an inner wall portion of the through-hole 31a. Yet, a bearing other than the slide bearing type may be used as the bearingportion 36. - The
exposure portion 34 is arranged on the output side (-Y side) from thehousing tube portion 14. Theexposure portion 34 is exposed outside thehousing 12. As shown inFIG. 1 andFIG. 2 , theexposure portion 34 has an axially extending (Y-axis direction) columnar shape. Theexposure portion 34 has an outercircumferential surface 34a which surrounds a radially outer side of the center axis J. In this embodiment, the outercircumferential surface 34a is provided, for example, to surround the entire circumference of the exposure portion in the circumferential direction. - Further, herein, descriptions such as 'an outer circumferential surface surrounding a radially outer side of the center axis' do not only strictly refer to a case in which the outer circumferential surface surrounds the entire circumference, but it may include a case, for example, in which the outer circumferential surface is provided only to a circumferential portion thereof. When the outer circumferential surface is provided only to a circumferential portion thereof, it may also include a case, for example, in which a plurality of exposure portions is arranged in the circumferential direction, and each corresponding outer circumferential surface surrounds a radially outer side of the center axis, and the like.
- Also, herein, descriptions such as 'the exposure portion having a columnar shape' may include a case of having a substantially columnar shape. The description of `a substantially columnar shape' includes, for example, a columnar shape with a cut-off portion, a columnar shape having a partially protruding portion, and the like.
- In this embodiment, the
exposure portion 34 radially overlaps with thepump chamber 33. As shown inFIG. 2 , the outercircumferential surface 34a of theexposure portion 34 has a pump body sideconcave portion 34b which is recessed radially inward. The pump body sideconcave portion 34b axially extends on the outercircumferential surface 34a. When seen in the axial direction (Y-axis direction), an opening of the pump body sideconcave portion 34b has a rectangular or substantially rectangular shape. The pump body sideconcave portion 34b is provided to theexposure portion 34, for example, throughout the entire axial direction. Yet, when seen in the axial direction (Y-axis direction), the opening of the body pump sideconcave portion 34b is not necessarily limited to a rectangular shape. - As shown in
FIG. 1 , in this embodiment, pumpbody 31 has a steppedportion 35 where a radial dimension becomes smaller toward the output side (-Y side). The steppedportion 35 has a steppedsurface 35a which intersects the axial direction (Y-axis direction). The steppedsurface 35a is in contact with the extendingportion 16. Specifically, the steppedsurface 35a is in contact with a surface on the counter-output side (+Y side) of the extendingportion 16. With this, it is possible to determine the axial position of thepump body 31 relative to thehousing 12. - In the
pump body 31, a portion on the counter-output side (+Y side) from the steppedportion 35a is fixed inside thehousing tube portion 14 by press-fitting, or the like. The portion on the counter-output side (+Y side) from the steppedportion 35a of the pump body 31 (that is, the exposure portion 34) protrudes to the output side from thehousing tube portion 14. - An O-
ring 38 is arranged in a radial between thepump body 31 and thehousing tube portion 14, and covers the entire circumference of the gap in the circumferential direction. - The
shaft 41 is attached to theinner rotor 61. Specifically, an end portion on the output side (-Y side) of theshaft 41 is fixed to theinner rotor 61. Theinner rotor 61 is accommodated inside thepump chamber 33. Theinner rotor 61 rotates around the center axis J (±θY direction) with the rotation of theshaft 41. - The
outer rotor 62 has an annular or substantially annular shape, and surrounds a radially outer side of theinner rotor 61. Theouter rotor 62 is accommodated inside thepump chamber 33. Theouter rotor 62 and theinner rotor 61 are engaged with each other. For this reason, theouter rotor 62 rotates with the rotation of theinner rotor 61. A rotary axis of theouter rotor 62 is a different axis from the center axis J that is, for example, parallel with the center axis J. - The
pump cover 32 is attached to the output side (-Y side) of thepump body 31. In this embodiment, thepump cover 32 is fixed to a surface on the output side of theexposure portion 34 of thepump body 31 by ascrew 94. The pump cover 32 covers the output side (-Y side) of thepump chamber 33. The pump cover 32 preferably has a pump covermain body portion 32c and aprotrusion portion 32d. Yet, thepump cover 32 may be fixed to the surface on the output side of theexposure portion 34 of thepump body 31 by other methods. - A surface on the counter-output side (+Y side) of the pump cover
main body portion 32c is in contact with a surface on the output side (-Y side) of thepump body 31. Theprotrusion portion 32d protrudes toward the output side from the pump covermain body portion 32c. - The
pump cover 32 has aninlet 32a and anoutlet 32b. Theinlet 32a and theoutlet 32b axially (Y-axis direction) penetrate thepump cover 32. Theinlet 32a and theoutlet 32b communicate with thepump chamber 33. As shown inFIG. 1 , theinlet 32a is arranged on a lower side (-Z side) than theoutlet 32b. Theoutlet 32b is arranged on theprotrusion portion 32d. Theoutlet 32b is open toward acontact surface 32e, which is a surface on the output side (-Y side) of theprotrusion portion 32d. - Next, a state will be explained in which the
pump device 10 is attached to a car body CB1. The car body CB1 preferably has a pump device accommodation portion BD1, an in-port portion IP and an out-port portion OP. The pump device accommodation portion BD1 is a concave portion which is recessed from a car body surface CBS toward the output side (-Y side). Thepump device 10 is accommodated inside the pump device accommodation portion BD1. In this embodiment, a surface on a radially inner side of the pump device accommodation portion BD1 has a cylindrical or substantially cylindrical shape. The pump device accommodation portion BD1 has an accommodation main body portion BD1a and a fitting portion BD1b. - The accommodation main body portion BD1 a is where a portion of the
motor portion 20 is arranged on a radially inner side. The accommodation main body portion BD1a is open toward the car body surface CBS. The fitting portion BD1b is arranged on the output side (-Y side) of the accommodation main body portion BD1a. A diameter of the fitting portion BD1b is smaller than a diameter of the accommodation main body portion BD1a. The fitting portion BD1b is fitted with theexposure portion 34. - As shown in
FIG. 2 , a radially inwardly protruding car body side convex portion CB1a is provided on an inner circumferential surface of the fitting portion BD1b. When seen in the axial direction (Y-axis direction), the car body side convex portion CB1a has, for example, a rectangular shape. The car body side convex portion CB1a is preferably provided to the fitting portion BD1b throughout the entire axial direction. - As shown in
FIG. 1 , the in-port portion IP and the out-port portion OP are open toward a bottom surface of the pump device accommodation portion BD1. That is, the in-port portion IP and the out-port portion OP are open toward an accommodation portion bottom surface BD1c, which is a bottom surface of the fitting portion BD1b. Thepump device 10 inhales fluid from the in-port portion IP, and discharges the fluid through the out-port portion OP. The fluid that is inhaled and discharged by thepump device 10 is not limited to a particular type; for example, oil may be used. In the following descriptions, the fluid sent out by thepump device 10 will be considered as oil. - The
housing flange portion 15 axially (Y-axis direction) overlaps with thecover flange portion 19. Thepump device 10 is coupled to the car body CB1 by a screw, via thehousing flange portion 15 and thecover flange portion 19. That is, thepump device 10 is fixed to the car body CB1 via thehousing flange portion 15. A surface on the output side (-Y side) of thehousing flange portion 15 is in contact with the car body surface CBS. - An O-ring 93 is arranged between the
housing flange portion 15 and the car body surface CBS. The O-ring covers the entire circumference of a gap between thehousing flange portion 15 and the car body surface CBS in the circumferential direction. - A portion of the
pump device 10 on the output side (-Y side) from thehousing flange portion 15 is inserted into the pump device accommodation portion BD1. An end portion on the output side of thepump device 10 is in contact with the accommodation portion bottom surface BD1c. - That is, an end portion on the output side of the
pump cover 32 is in contact with the accommodation portion bottom surface BD1c. An end portion on the output side of thepump cover 32 is thecontact surface 32e of theprotrusion portion 32d. Thepump cover 32 is inserted into the fitting portion BD1b. Thepump cover 32 is provided on a radially inner side, spaced apart from an inner surface of the fitting portion BD1b. - The in-port portion IP is connected to the
inlet 32a of thepump cover 32. Accordingly, oil is introduced into thepump chamber 33 from the in-port portion IP via theinlet 32a. The out-port portion OP is connected to theoutlet 32b of thepump cover 32. Accordingly, the oil introduced into thepump chamber 33 is discharged from the out-port portion OP via theoutlet 32b. - An O-
ring 37 is arranged between thecontact surface 32e of theprotrusion portion 32d and the accommodation portion bottom surface BD1c. The O-ring 37 surrounds theoutlet 32b and the out-port portion OP in the circumferential direction. Accordingly, it is possible to prevent the oil introduced into thepump device 10 from the in-port portion IP from flowing into the out-port portion OP via thecontact surface 32e and the accommodation portion bottom surface BD1c. - The
exposure portion 34 is fitted with the fitting portion BD1b of the pump accommodation portion BD1. In this embodiment, theexposure portion 34 is, for example, clearance-fitted into the fitting portion BD1b. For this reason, it is possible to prevent a vibration of the car body CB1 from being delivered to theoutlet 32b via theinlet 32a. Herein, this feature will be explained in more detail. - The vibration of the car body CB1 is delivered to the
inlet 32a and theoutlet 32b via thehousing flange portion 15. In order to inhibit the propagation of this vibration, it is preferable to support thepump device 10 of the car body CB1 in the vicinity of theinlet 32a and theoutlet 32b. For example, a configuration may be considered in which an outer surface of thehousing 12 is fitted into the fitting portion BD1b to support thepump device 10. In this configuration, it is necessary to increase a dimensional accuracy of an inner surface of thehousing 12, so as to fit thepump body 31 and thestator 50 into the inner surface of thehousing 12. - However, in a case where the
housing 12 is manufactured by press processing, when the inner surface of thehousing 12 is accurately formed, the dimensional accuracy of the outer surface may be relatively low. Therefore, when an outer surface of the housing is fitted into the fitting portion BD1b, thepump device 10 may not be fitted into the fitting portion BD1b in a highly precise manner. As a result, thepump device 10 may not be securely supported by the fitting portion BD1b, and the vibration that is delivered from the car body CB1 to theinlet 32a and theoutlet 32b may not be sufficiently suppressed. - According to this embodiment, the
exposure portion 34 is fitted into the fitting portion BD1b. Thepump body 31 is manufactured by, for example, performing cutting work on a metal member. Therefore, when cutting work is performed, the outercircumferential surface 34a of theexposure portion 34 is accurately formed. Accordingly, theexposure portion 34 may be fitted into the fitting portion BD1b in a highly precise manner. With this, thepump body 10 is fixed to the car body CB1 via the housing flange portion, and simultaneously, theexposure portion 34 is securely fitted into the fitting portion BD1b so that the pump device 1 is supported in the vicinity of theinlet 32a and theoutlet 32b. As a result, it is possible to prevent the vibration of the car body CB1, which is delivered to thepump device 10 through thehousing flange 15, from being delivered to theinlet 32a and theoutlet 32b which are arranged on the output side (-Y side) from theexposure portion 34 in a greatly amplified manner. - Accordingly, it is possible to prevent the O-
ring 37, which seals around theoutlet 32b from wearing off due to the rubbing movement which may be caused by the vibration. - Further, another method of accurately forming an outer surface of the
housing 12 may be considered, by when thehousing 12 is manufactured by performing additional processing on an outer surface of thehousing 12 after manufacturing thehousing 12 by press processing. This method is also capable of fitting the outer surface of thehousing 12 into the fitting portion BD1b in a highly precise manner. - However, in this case, it is necessary to additionally process the
housing 12, which has been manufactured by press processing, by lathe-chuck process, or the like. Therefore, the step of forming thehousing 12 is increased. As a result, manufacturing cost of thepump device 10 is increased. - According to this embodiment, the
pump body 31 is manufactured by performing cutting work, or the like, on a metal member. Therefore, by performing cutting work when manufacturing thepump body 31, it is possible to accurately form the outercircumferential surface 34a of theexposure portion 34. That is, in the process of manufacturing thepump body 31 by cutting work, by performing an additional process on thepump body 31 which has been already cut by lathe-chuck processing, or the like, it is possible to accurately form the outerperipheral surface 34a on thepump body 31. Thus, there is no need to change the machine tool used to process a member in order to form a portion that is to be fitted into the fitting portion BD1b, and therefore it is possible to suppress the increase of manufacturing time and cost involved in producing thepump device 10. - Further, in order to suppress the propagation of vibrations of the car body CB1, another configuration may be considered, in which the
protrusion portion 32d of thepump cover 32 is fitted into the out-port portion OP, or the like, to support thepump device 10. However, in this case, if the diameter of theprotrusion portion 32d is sufficiently increased, theprotrusion portion 32d may be deformed or damaged by the stress caused by the vibration of the car body CB1. Therefore, since it is necessary to relatively increase the diameter of theprotrusion portion 32d, theentire pump device 10 may increase in size. - According to this embodiment, it is unnecessary to increase the
protrusion portion 32d in order to fit theexposure portion 34 to the car body BD1b. Therefore, it is possible to suppress the size increase in thepump device 10. - Further, another configuration may be considered, in which the pump cover
main body portion 32c is fitted into the fitting portion BD1b to support thepump device 10, in order to suppress the propagation of vibrations of the car body CB1. However, thepump cover 32 is attached to thepump body 31 by thescrew 94. Therefore, as compared with thepump body 31, it is more likely that an assembly error may occur between thepump cover 32 and thehousing 12. Thus, thepump cover body 32c may not be fitted into the fitting portion BD1b in a highly precise manner. - As compared with the
pump cover 31, it is less likely for an assembly error to occur between theexposure portion 34 of thepump body 31 and thehousing 12. In this embodiment, theexposure portion 34 of thepump body 31 is fitted into the fitting portion BD1b. Therefore, it is possible to fit theexposure portion 34 in to the fitting portion BD1b in a highly precise manner. - Further, as discussed above, according to this embodiment, the
cover pump 32 is attached to theexposure portion 34. Also, thepump cover 32 is attached to theexposure portion 34 after thepump body 31 is fixed inside thehousing 12. For this reason, the order of assembly of thepump device 10 may be arbitrarily changed, and the assembly of thepump device 10 may be easily performed. Further, after thepump device 10 is assembled, thepump cover 32 may be removed from thepump device 10. With this, it is possible to exchange theinner rotor 61 and theouter rotor 62 inside thepump chamber 33, and thereby the maintenance of thepump device 10 may be easily performed. - According to this embodiment, the
exposure portion 34 radially overlaps with thepump chamber 33. For this reason, it is possible to support theinner rotor 61 and theouter rotor 62, which are accommodated inside thepump chamber 33, by fitting a radially outer portion thereof into the fitting portion BD1b. Accordingly, it is possible to prevent the vibration due to the rotation of theinner rotor 61 andouter rotor 62 from being delivered to theinlet 32a and theoutlet 32b. As a result, it is also possible to further prevent the O-ring 37 from wearing off. - In a case where the
exposure 34 does not radially overlap with thepump chamber 33, another configuration may be considered, for example, in which theexposure portion 34 is disposed on the output side (+Y side) from thepump chamber 33. In this configuration, an axial (Y-axis direction) size of the portion of thepump body 31 protruding to the output side (-Y side) from thehousing 12 is likely to increase. Therefore, the axial size of theentire pump device 10 is likely to increase. - In contrast, according to this embodiment, since the
exposure portion 34 radially overlaps with thepump chamber 33, it is possible to suppress the size increase of a portion of thepump body 31 protruding toward the output side (-Y side) from thehousing 12. Therefore, according to this embodiment, it is possible to suppress the axial size increase in thepump device 10. - Further, according to this embodiment, the
pump body 31 has the bearingportion 36 which supports theshaft 41. Therefore, by fitting thepump body 31 into the fitting portion BD1b in a highly precise manner, it is possible to attach thepump device 10 to the car body CB1 with a high axis precision of theshaft 41. - As shown in
FIG. 2 , theexposure 34 and the car body CB1 are provided with a position adjustment portion PA1 which determines a relative circumferential position between theexposure portion 34 and the car body CB1. The position adjustment portion PA1 is defined by the pump body sideconcave portion 34b and the car body side convex portion CB1a. That is, the position adjustment portion PA1 includes the pump body sideconcave portion 34b and the car body side convex portion CB1a. The pump body sideconcave portion 34b is arranged on the outercircumferential surface 34a of theexposure portion 34, and recessed radially inward. The car body side convex portion CB1a is arranged on the inner circumferential surface of the fitting portion BD1b, and protrudes radially inward. - In a state in which the
pump body 10 is attached to the car body CB1, the pump body sideconcave portion 34b radially faces the car body side convex portion CB1a. With this structure, a relative circumferential position of theexposure portion 34 and the car body CB1 is determined. Therefore, thepump device 10 is easily attached to the car body CB1. - The pump body side
concave portion 34b and the car body side convex portion CB1a may be, for example, fittingly engaged with each other. With this structure, it is possible to determine the relative circumferential position of theexposure portion 34 to the car body CB1 in a highly precise manner. - In the present disclosure, the description of 'the pump body side concave portion which is disposed on the outer circumferential surface of the exposure portion and recessed radially inward' includes a portion on a radially inner side from the cylindrical outer circumferential surface of the exposure portion.
- When the
motor portion 20 is driven and theshaft 41 rotates, theinner rotor 61, which is fixed to theshaft 41, rotates. With the rotation of theinner rotor 61, theouter rotor 62 rotates. With the rotation of theinner rotor 61 and theouter rotor 62, oil is introduced into thepump chamber 33 from the in-port portion IP, through theinlet 32a. With the rotation of theinner rotor 61 and theouter rotor 62, the oil that was introduced into thepump chamber 33 moves inside thepump chamber 33, and is discharged out of thepump device 10 from the out-port portion OP, through theoutlet 32b. With this, thepump portion 30 is driven by themotor portion 20, and thepump device 10 sends oil from the in-port portion IP to the out-port portion OP. - Further, in this embodiment, the following configuration may be employed. In the following description, similar features from the previous description will be described with identical reference numbers, and they will not be explained in further detail.
- There may not be just one
exposure portion 34, and a plurality of exposure portions may be provided. In this case, the plurality ofexposure portions 34 are arranged along the circumferential direction. The plurality ofexposure portions 34 surround a radially outer side of the center axis J. That is, an outer surface on the radially outer side of the plurality ofexposure portions 34 surround the radially outer side of the center axis J. - The
exposure portion 34 may not radially overlap with thepump chamber 33. Theexposure portion 34 may be arranged on the output side (-Y side) or the counter-output side (+Y side) from thepump chamber 33. - The bearing
portion 36 may be a bearing other than the slide bearing type, such as roll bearing, and the like. Further, thepump body 31 may not have the bearingportion 36. - The type of fitting performed between the
exposure portion 34 and the fitting portion BD1b is not particularly limited, and may be, for example, interference fitting. - The structure of the position adjustment portion PA1 is not particularly limited, and may employ, for example, the structure shown in
FIG. 3 andFIG. 4 . -
FIG. 3 is a cross-sectional view of a portion of another example of apump device 110 according to this embodiment. As shown inFIG. 3 , thepump device 110 is attached to a car body CB2. Thepump device 110 includes apump portion 130. Thepump portion 130 has apump body 131. Thepump body 131 has anexposure portion 134. - The car body CB2 has a pump device accommodation portion BD2. The pump device accommodation portion BD2 has a fitting portion BD2b. The
exposure portion 134 is fitted into the fitting portion BD2b. - A position adjustment portion PA2 is provided to the
exposure portion 134 and the car body CB2. The position adjustment portion PA2 preferably has a pump body sideconcave portion 134b and a car body side convex portion CB2a. The pump body sideconcave portion 134b is arranged on an outercircumferential surface 134a of theexposure portion 134, and recessed radially inward. As shown inFIG. 3 , when seen in the axial direction, an opening portion of the pump body sideconcave portion 134b has a partially linearly notched circular shape. As shown inFIG. 3 , when seen in the axial direction, a contour of theexposure portion 134 has a partially linearly notched circular shape. - The car body side convex portion CB2a is arranged on an inner circumferential surface of the fitting portion BD2b, and protrudes radially inward. As shown in
FIG. 3 , when seen in the axial direction (Y-axis direction), the car body side convex portion CB2a has a partially linearly notched circular shape. - In the example shown in
FIG. 3 , the pump body sideconcave portion 134b may radially face the car body side convex portion CB2a, and fitted with each other. With this, the position adjustment portion PA2 is defined, and a relative circumferential position between theexposure portion 134 and the car body CB2 is determined by the position adjustment portion PA2. Other elements of thepump device 110 are identical to those of thepump device 10 shown inFIG. 1 andFIG. 2 . Other elements of the car body CB2 are identical to those of the car body CB1 shown inFIG. 1 andFIG. 2 . -
FIG. 4 is a cross-sectional view of a portion of another example of apump device 210 according to this embodiment. As shown inFIG. 4 , thepump device 210 is attached to a car body CB3. Thepump device 210 includes apump portion 230. Thepump portion 230 has apump body 231. Thepump body 231 has anexposure portion 234. - The car body CB3 has a pump device accommodation portion BD3. The pump device accommodation portion BD3 has a fitting portion BD3b. The
exposure portion 234 is fitted into the fitting portion BD3b. - A position adjustment portion PA3 is provided to the
exposure portion 234 and the car body CB3. The position adjustment portion PA3 has a pump body sideconvex portion 234b and a car body side concave portion CB3a. The pump body sideconvex portion 234b is arranged on an outercircumferential surface 234a of theexposure portion 234, and protrudes radially outward. When seen in the axial direction (Y-axis direction), the pump body sideconvex portion 234b has a rectangular or substantially rectangular shape. Further, when seen in the axial direction (Y-axis direction), the pump body sideconvex portion 234b may have a shape other than the rectangular shape. - The car body side concave portion CB3a is arranged on an inner circumferential surface of the fitting portion BD3b, and recessed radially outward. When seen in the axial direction (Y-axis direction), an opening portion of the car body side concave portion CB3a has a rectangular or substantially rectangular shape.
- The pump body side
convex portion 234b radially faces the car body side concave portion CB3a. As shown in the example ofFIG. 4 , the pump body sideconvex portion 234b is fitted into the car body side concave portion CB3a. With this, a relative circumferential position between theexposure portion 234 and the car body CB3 is determined by the position adjustment portion PA3. Further, when seen in the axial direction (Y-axis direction), the pump sideconvex portion 234b may have a shape other than the rectangular shape, as long as it can be fitted into the car body side concave portion CB3a. Other elements of thepump device 210 are identical to those of thepump device 10 shown inFIG. 1 andFIG. 2 . Other elements of the car body CB3 are identical to those of the car body CB1 shown inFIG. 1 andFIG. 2 . - When compared with the first embodiment, a difference in the second embodiment is that a flow channel, where oil passes through, is provided between the exposure portion and the fitting portion. In the following description, similar features from the previous description will be described with identical reference numbers, and they will not be explained in further detail.
-
FIG. 5 is a cross-sectional view of a portion of apump device 310 according to this embodiment.FIG. 6 illustrates a portion of thepump device 310, and corresponds to a cross-sectional view taken along VI-VI shown inFIG. 5 . As shown inFIG. 5 , thepump device 310 is attached to a car body CB4. Thepump device 310 preferably has acase 11, amotor portion 20 and apump portion 330. - The
pump portion 330 preferably has apump body 331, apump cover 32, aninner rotor 61 and anouter rotor 62. Thepump body 331 has anexposure portion 334. The car body CB4 has a pump device accommodation portion BD4. The pump device accommodation portion BD4 preferably has an accommodation main body portion BD4a and a fitting portion BD4b. Theexposure portion 334 is fitted into the fitting portion BD4b. The accommodation main body portion BD4a is identical to the accommodation main body portion BD1a of the first embodiment. - As shown in
FIG. 6 , a flow channel FC1, where oil passes through, is provided in a radial gap between theexposure portion 334 and the fitting portion BD4b. As shown inFIG. 5 , the flow channel FC1 is connected to aninlet 32a. For this reason, the oil, which is introduced from the in-port portion IP into theinlet 32a, flows into the accommodation main body portion BD4a via the flow channel FC1. Specifically, the oil flows through a radial gap between the accommodation main body portion BD4a and ahousing 12. With this, the oil cools down a portion inside the accommodation main body portion BD4a of thepump device 310. The portion inside the accommodation main body portion BD4a of thepump device 310 includes, for example, in this embodiment, arotor 40 and astator 50. - As in the
pump device 110 shown inFIG. 1 , in a state in which thepump body 310 is attached to the car body CB4, an O-ring 93 is arranged between ahousing flange portion 15 and a car body surface CBS. For this reason, it is possible to prevent the oil introduced into the accommodation main body portion BD4a from leaking outside between thehousing flange portion 15 and the car body surface CBS. - As shown in
FIG. 6 , in this embodiment, a flow channel FC2, where oil passes through, is provided in a radial gap between theexposure 334 and the fitting portion BD4b, separately from the flow channel FC1. That is, in this embodiment, two flow channels FC1, FC2 are provided in a radial gap between theexposure portion 334 and the fitting portion BD4b. For this reason, the oil introduced into the accommodation main body portion BD4a via the flow channel FC1 flows out of the accommodation main body portion BD4a via the flow channel FC2. With this, it is possible to circulate the oil introduced into the accommodation main body portion BD4a inside thepump device 310. As a result, is possible to further cool down thepump device 310. - As shown in
FIG. 6 , the flow channel FC1 is arranged on a lower (-Z side) end portion in a radial gap between theexposure portion 334 and the fitting portion BD4b. The flow channel FC2 is arranged on an upper (+Z side) end portion in a radial gap between theexposure portion 334 and the fitting portion BD4b. That is, the two flow channels FC1, FC2 are arranged on a radially opposite side from each other on the center axis J. - For this reason, while the oil is introduced into the accommodation main body portion BD4a via the fluid channel FC1, and while the introduced oil is flown out of the accommodation main body portion BD4a via the flow channel FC2, it is possible to cool down the
entire pump device 310 in the circumferential direction. Specifically, in the example shown inFIG. 5 andFIG. 6 , the oil is introduced into the accommodation main body portion BD4a from the in-port portion IP via the flow channel FC1. Then, the oil introduced into the accommodation main body portion BD4a flows to the upper side (+Z side) along an outer circumferential surface of thehousing 12, and flows out of the accommodation main body portion BD4a via the flow channel FC2. With this, it is possible to cool down theentire pump device 310 in the circumferential direction, with the oil introduced into the accommodation main body portion BD4a. - The outer
circumferential surface 334a is surface on a radially outer side of theexposure portion 334. As shown inFIG. 6 , radially inwardly recessed exposureportion side grooves circumferential surface 334a. As shown inFIG. 5 , the exposureportion side grooves portion side grooves concave portion 34b shown inFIG. 2 . - As shown in
FIG. 6 , the exposureportion side groove 334b is arranged on a lower (-Z side) end portion of the outercircumferential surface 334a. The exposureportion side groove 334c is arranged on an upper (+Z side) end portion of the outercircumferential surface 334a. - A surface on a radially inner side of the fitting portion BD4b is provided with radially outwardly recessed fitting portion side grooves CB4a, CB4b. As shown in
FIG. 5 , the fitting portion side grooves CB4a, CB4b extend in the axial direction (Y-axis direction). The fitting portion side grooves CB4a, CB4b have a shape that is, for example, identical to the car body side concave portion CB3a. - The fitting portion side groove CB4a is arranged on a lower (-Z side) end portion of a radially inner side surface of the fitting portion BD4b. The fitting portion side groove CB4b is arranged on an upper (+Z side) end portion of a radially inner side surface of the fitting portion BD4b.
- The
exposure side groove 334b radially faces the fitting portion side groove CB4a. Accordingly, the exposureportion side groove 334b and the fitting portion side groove CB4a define the flow channel FC1. That is, the exposureportion side groove 334b defines at least a portion of the flow channel FC1. The fitting portion side groove CB4a defines at least a portion of the flow channel FC1. - The exposure
portion side groove 334c radially faces the fitting portion side groove CB4b. Accordingly, the exposureportion side groove 334c and the fitting portion side groove CB4b define the flow channel FC2. That is, the exposureportion side groove 334c defines at least a portion of the flow channel FC2. The fitting portion side groove CB4b defines at least a portion of the flow channel FC2. - According to this embodiment, grooves are provided to both the
exposure portion 334 and the fitting portion BD4b, and the grooves radially face one another, thereby defining the flow channels FC1, FC2. For this reason, it is possible to increase a cross-sectional area of the flow channels FC1, FC2. Accordingly, it is possible for the oil to smoothly pass through the flow channels FC1, FC2. - In this embodiment, an X-axial width of the fitting portion side grooves CB4a, CB4b is bigger than an X-axial width of the exposure
portion side grooves pump device 310 are identical to those of thepump device 10 described in the first embodiment. Other elements of the car body CB4 are identical to those of the car body CB1 described in the first embodiment. - Further, the following configuration may be employed in this embodiment.
- The number of the flow channels FC1, FC2 employed may be one or may be three, or more. The shape of the flow channels FC1, FC2 is not particularly limited.
- The flow channels FC1, FC2 may be defined by either the exposure
portion side grooves portion side grooves - Further, a method of mounting the pump device of this embodiment onto the car body is not particularly limited to the above-described method. The pump device of this embodiment may be, for example, mounted onto the car body in a state in which the exposure portion is not fitted into the fitting portion of the car body.
- Features of the above-described preferred embodiments and the modifications thereof may be combined appropriately as long as no conflict arises.
- While the description above refers to particular embodiments of the present invention, it will be understood that many modifications may be made.
- The presently disclosed embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, rather than the foregoing description.
Claims (6)
- An arrangement comprising a component (CB1) of a vehicle and a pump device (10) suitable to be mounted in the vehicle, the pump device comprising:a motor portion (20) having a shaft (41) having a center thereof on an axially extending center axis (J), a rotor (40) which is fixed to the shaft (41), and a stator (50) which is arranged on a radially outer side of the rotor (40), wherein the axis (J) includes a first axial side and a second axial side opposite to the first axial side;a pump portion (30, 230, 330) which is arranged on the first axial side of the motor portion (20), and driven by the motor portion (20);a case (11) having a lid portion (18) which is arranged on the second axial side of the motor portion (20), a tube body (17, 14) including a first tube portion (17) arranged on the lid portion (18) and a second tube portion (14) arranged on the first tube portion (17) at the first axial side, and a flange portion (15, 19) arranged between the first tube portion (17) and second tube portion (14) and extending radially outward from the tube body (17,14);the pump portion (30,130,230,330) including:an inner rotor (61) which is attached to the shaft (41);an annular outer rotor (62) which surrounds a radially outer side of the inner rotor (61);a pump body (31, 131, 231, 331) which accommodates the inner rotor (61) and the outer rotor (62); anda pump cover (32) which is attached to the pump body (31,131,231,331) at the first axial side,wherein the pump body (31,131,231,331) has a pump chamber (33) which is recessed from a surface on the first axial side toward the second axial side and accommodates the inner rotor (61) and the outer rotor (62), and a through-hole (31a) which axially penetrates through the pump body (31,131,231,331) and through which the shaft (41) passes,wherein the pump cover (32) has an inlet (32a) and an outlet (32b) which are in communication with the pump chamber (33),wherein a surface of the flange portion (15) at the first axial side is in contact with a surface (CBS) of the component (CB1) of the vehicle and the pump device (10) is fixed to the component (CB1) via the flange portion (15),wherein the component (CB1) has a pump device accommodation portion (BD1) which is recessed from the surface (CBS) toward the first axial side,wherein the pump device accommodation portion (BD1) has an accommodation main body portion (BD1a) and a fitting portion (BD1b),wherein at least a portion of the motor portion (20) is arranged in a radially inner side of the accommodation main body portion (BD1a) opening toward the surface (CBS), andthe fitting portion (BD1b) which is arranged on the accommodation main body portion (BD1a) at the first side is fitted with the pump body (31, 131, 231, 331).
- The arrangement according to Claim 1, wherein the pump cover further has a protrusion portion (32d) in contact with the pump device accommodation portion (BD1), wherein an sealing ring(37) is provided between the protrusion portion (32d) and the accommodation portion (BD1).
- The arrangement according to Claim 1 and 2, wherein the pump body (31, 131, 231, 331) has a bearing portion (36) which supports the shaft (41).
- The arrangement according to Claim 1 to 3, wherein the component (CB1, CB2, CB3, CB4) has an in-port portion (IP) which is connected with the inlet (32a), and an out-port portion (OP) which is connected with the outlet (32b).
- A vehicle comprising the component and the pump device according to any one of claims 1 to 4, wherein the pump device is fixed to the component.
- The vehicle according to claim 5 wherein the component comprises an automatic transmission.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015110881A JP6682769B2 (en) | 2015-05-29 | 2015-05-29 | Pump device |
EP16168993.0A EP3098382B1 (en) | 2015-05-29 | 2016-05-10 | Pump device comprising a motor portion and a pump portion with a housing |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16168993.0A Division EP3098382B1 (en) | 2015-05-29 | 2016-05-10 | Pump device comprising a motor portion and a pump portion with a housing |
Publications (2)
Publication Number | Publication Date |
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EP3839208A1 EP3839208A1 (en) | 2021-06-23 |
EP3839208B1 true EP3839208B1 (en) | 2023-12-20 |
Family
ID=56116197
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP21156611.2A Active EP3839208B1 (en) | 2015-05-29 | 2016-05-10 | Pump device |
EP16168993.0A Active EP3098382B1 (en) | 2015-05-29 | 2016-05-10 | Pump device comprising a motor portion and a pump portion with a housing |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP16168993.0A Active EP3098382B1 (en) | 2015-05-29 | 2016-05-10 | Pump device comprising a motor portion and a pump portion with a housing |
Country Status (2)
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EP (2) | EP3839208B1 (en) |
JP (1) | JP6682769B2 (en) |
Families Citing this family (12)
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JP2017029837A (en) * | 2016-11-16 | 2017-02-09 | 京楽産業.株式会社 | Game machine |
CN109424539A (en) * | 2017-08-31 | 2019-03-05 | 杭州三花研究院有限公司 | Electronic oil pump |
CN109424538A (en) * | 2017-08-31 | 2019-03-05 | 杭州三花研究院有限公司 | Electronic oil pump |
CN109424542A (en) * | 2017-08-31 | 2019-03-05 | 杭州三花研究院有限公司 | Electronic oil pump |
CN109424540A (en) * | 2017-08-31 | 2019-03-05 | 杭州三花研究院有限公司 | Electronic oil pump |
JP2020026735A (en) * | 2018-08-09 | 2020-02-20 | アイシン精機株式会社 | Attachment structure of electric pump |
JP2020165410A (en) * | 2019-03-29 | 2020-10-08 | 日本電産トーソク株式会社 | Electric pump device and electric pump device mounting structure |
DE102020106796A1 (en) * | 2020-03-12 | 2021-09-16 | Schwäbische Hüttenwerke Automotive GmbH | Pump insert and pump arrangement with such a pump insert |
JP7463775B2 (en) | 2020-03-13 | 2024-04-09 | ニデックパワートレインシステムズ株式会社 | Electric pump |
DE102020118012A1 (en) | 2020-07-08 | 2022-01-13 | Nidec Gpm Gmbh | Pump for conveying a fluid |
JP7275434B2 (en) * | 2020-09-29 | 2023-05-18 | ニデックパワートレインシステムズ株式会社 | Electric pump device and mounting structure of the electric pump device |
DE102022207129A1 (en) * | 2022-07-12 | 2024-01-18 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Electric fluid pump for a motor vehicle |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US7278841B2 (en) * | 2001-12-13 | 2007-10-09 | Performance Pumps, Llc | Gerotor pump |
JP4096657B2 (en) * | 2002-08-05 | 2008-06-04 | 株式会社ジェイテクト | pump |
EP2463556B1 (en) * | 2009-08-04 | 2018-04-25 | JTEKT Corporation | Electric pump unit |
JP5431872B2 (en) | 2009-10-30 | 2014-03-05 | 日本電産トーソク株式会社 | Electric pump |
JP6108590B2 (en) * | 2012-01-17 | 2017-04-05 | アスモ株式会社 | Electric pump |
JP6010937B2 (en) * | 2012-03-14 | 2016-10-19 | 日立化成株式会社 | Manufacturing method of internal gear pump |
JP6084858B2 (en) * | 2013-02-25 | 2017-02-22 | アスモ株式会社 | Electric pump and electric pump assembly method |
US9453508B2 (en) * | 2013-02-25 | 2016-09-27 | Asmo Co., Ltd. | Electric oil pump and hydraulic pressure supply device |
JP6306320B2 (en) * | 2013-03-06 | 2018-04-04 | アスモ株式会社 | Electric oil pump and hydraulic supply device |
-
2015
- 2015-05-29 JP JP2015110881A patent/JP6682769B2/en active Active
-
2016
- 2016-05-10 EP EP21156611.2A patent/EP3839208B1/en active Active
- 2016-05-10 EP EP16168993.0A patent/EP3098382B1/en active Active
Also Published As
Publication number | Publication date |
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EP3098382A1 (en) | 2016-11-30 |
EP3839208A1 (en) | 2021-06-23 |
EP3098382B1 (en) | 2021-03-03 |
JP2016223366A (en) | 2016-12-28 |
JP6682769B2 (en) | 2020-04-15 |
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