US20120244021A1 - Pump mounting structure - Google Patents

Pump mounting structure Download PDF

Info

Publication number
US20120244021A1
US20120244021A1 US13/418,820 US201213418820A US2012244021A1 US 20120244021 A1 US20120244021 A1 US 20120244021A1 US 201213418820 A US201213418820 A US 201213418820A US 2012244021 A1 US2012244021 A1 US 2012244021A1
Authority
US
United States
Prior art keywords
mounting
housing
pump
insertion recess
mounting portion
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.)
Abandoned
Application number
US13/418,820
Other languages
English (en)
Inventor
Ryo Umeyama
Kazuho Yamada
Tatsuyuki Hoshino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI reassignment KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOSHINO, TATSUYUKI, UMEYAMA, RYO, YAMADA, KAZUHO
Publication of US20120244021A1 publication Critical patent/US20120244021A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • F01C21/007—General arrangements of parts; Frames and supporting elements
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • 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
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • 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
    • F04C2230/604—Mounting devices for pumps or compressors
    • 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
    • F04C2240/80—Other components
    • F04C2240/805—Fastening means, e.g. bolts
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/12—Vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0241—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread with the possibility for the connection to absorb deformation, e.g. thermal or vibrational

Definitions

  • the present invention relates to a pump mounting structure.
  • a rotation shaft rotated by a driving force from a driving source and a pump portion driven in accordance with the rotation of the rotation shaft are housed in a housing of a pump such as a compressor.
  • the rotation shaft is rotatably supported on the housing via bearings.
  • the housing of the pump is provided with at least three mounting members for mounting the pump to a surface of a body to be mounted that forms an engine compartment, so as to ensure resistance to vibration of the pump, for example.
  • Each mounting member is fastened to the mounting surface with a bolt, thereby mounting the pump to the body.
  • the temperature within the engine compartment increases, for example, due to heat generated from the engine of a vehicle while driving.
  • the temperature of each of the housing and the body rises due to the heat generated from the engine, and the housing and body thermally expand with the rise of temperature. Since there occurs a difference in temperature and also a difference in thermal expansion coefficients between the housing and the body, there is a relative difference between the thermal expansion of the housing and the thermal expansion of the body. Thus, the amount of deformation of the housing due to the thermal expansion is different from that of the body. Due to the difference in the amount of deformation between the housing and the body, a load is applied to the bolt for fastening a mounting member and the corresponding mounting surface, so that the housing is deformed with the displacement of the bolt caused by the load applied to the bolt.
  • each bearing provided in the housing is displaced, and the center axis of each of the bearings for supporting the rotation shaft is displaced.
  • the rotation shaft is rotated in a state where this axial displacement takes place, it is possible that noise is generated and the durability of each bearing is decreased.
  • a mesh-type pump including two or more rotation shafts it is a great issue if an interference occurs in a pump portion because the shafts are not parallel with each other.
  • the pump includes a housing, a rotation shaft and a pump portion being housed in the housing.
  • the rotation shaft is rotated by driving force of a driving source.
  • the pump portion is driven along with rotation of the rotation shaft.
  • the rotation shaft is rotatably supported on the housing via a bearing.
  • a plurality of mounting members are provided for the housing.
  • a bolt is inserted into each of the plurality of mounting members and is fastened to a body to be mounted to thereby mount the pump to the body.
  • the structure includes a mounting surface on the body, at least one mounting member and a seal member.
  • An insertion recess is formed in the mounting surface.
  • the insertion recess includes an inner surface.
  • At least one mounting member has a mounting portion inserted into the insertion recess.
  • the mounting portion has an outer surface and an insertion hole through which the bolt is inserted.
  • a first gap is formed between the insertion hole and the bolt.
  • a second gap is formed between the outer surface of the mounting portion and the inner surface of the insertion recess.
  • the seal member is disposed on an open side of the insertion recess relative to an area between the mounting portion and the insertion recess into which the lubricant is filled.
  • FIG. 1 is a sectional view of an electric roots-type pump according to one embodiment
  • FIG. 2A is an enlarged sectional view illustrating a state where a mounting member is mounted on a mounting surface
  • FIG. 2B is a sectional view taken along the line 2 B- 2 B of FIG. 2A ;
  • FIG. 3A is a sectional view illustrating a state where a housing and a body to be mounted have thermally expanded
  • FIG. 3B is a sectional view taken along the line 3 B- 3 B of FIG. 3A ;
  • FIG. 4A is a sectional view illustrating a state where a housing and a body to be mounted according to another embodiment are thermally expanded.
  • FIG. 4B is a sectional view taken along the line 4 B- 4 B of FIG. 4A .
  • An electric roots-type pump is mounted in a fuel cell powered vehicle, and is used to supply hydrogen to a fuel cell system that generates electric power by supplying oxygen and hydrogen to fuel cells.
  • “front” and “rear” of the electric roots-type pump correspond to the front and rear directions indicated by an arrow Y 1 illustrated in FIG. 1
  • “left” and “right” of the electric roots-type pump correspond to the right and left directions indicated by an arrow Y 2 illustrated in FIG. 1 .
  • an electric roots-type pump 10 includes a pump portion 11 and a driving portion 12 .
  • a housing H of the electric roots-type pump 10 is configured so that a gear housing 14 made of aluminum is joined and fixed to the front side of a rotor housing 13 made of iron and a motor housing 17 made of aluminum is joined and fixed to the front side of the gear housing 14 .
  • the rotor housing 13 includes a first housing 13 a for forming the rotor housing 13 and a second housing 13 b for forming the rotor housing 13 .
  • the pump portion 11 is formed so that the second housing 13 b is fixed to the rear side of the first housing 13 a with a fixing bolt 13 c .
  • a pump chamber 15 is formed between the first housing 13 a and the second housing 13 b .
  • the gear housing 14 is joined and fixed to the front side of the first housing 13 a , and a gear chamber 16 is formed between the first housing 13 a and the gear housing 14 .
  • the driving portion 12 is formed by joining and fixing the motor housing 17 to the front side of the gear housing 14 .
  • a motor chamber 18 is formed between the motor housing 17 and the gear housing 14 .
  • the motor chamber 18 houses an electric motor 19 serving as a driving source.
  • a stator 19 a is fixed to an inner peripheral surface of the motor housing 17 .
  • the stator 19 a is configured so that a coil 192 a is wound around teeth (not illustrated) of a stator core 191 a fixed to the inner peripheral surface of the motor housing 17 .
  • a motor rotor 19 b is provided within the stator 19 a .
  • the motor rotor 19 b includes a rotor core 191 b fixed to a driving shaft 21 serving as a rotation shaft, and a plurality of permanent magnets 192 b provided on a peripheral surface of the rotor core 191 b.
  • the driving shaft 21 is rotatably supported on the first housing 13 a and the motor housing 17 via bearings 23 a and 23 c .
  • a driven shaft 22 provided in parallel with the driving shaft 21 is rotatably supported on the first housing 13 a via a bearing 23 b .
  • the bearings 23 a and 23 b are respectively fit into fitting holes 24 a and 24 b formed in the first housing 13 a , thereby being supported on the first housing 13 a .
  • the gear chamber 16 houses a driving gear 25 , which is fixed to the driving shaft 21 , and a driven gear 26 , which is fixed to the driven shaft 22 , in a state where the driving gear 25 and the driven gear 26 are engaged with each other.
  • the driving shaft 21 and the driven shaft 22 are coupled via the driving gear 25 and the driven gear 26 .
  • a drive rotor 27 which is made of iron and housed in the pump chamber 15 , is fixed to the driving shaft 21 .
  • a driven rotor 28 which is made of iron and housed in the pump chamber 15 , is fixed to the driven shaft 22 .
  • the shapes of the driving rotor 27 and the driven rotor 28 bifoliate or gourd in a cross-sectional view orthogonal to the direction along an axis line M (axial direction) of the driving shaft 21 . That is, the driving rotor 27 and the driving rotor 28 each have two lobes.
  • the driving rotor 27 and the driven rotor 28 are housed in the pump chamber 15 so that convex teeth 27 a of the driving rotor 27 and concave teeth 28 a of the driven rotor 28 can be engaged with each other and concave teeth (not illustrated) of the driving rotor 27 and convex teeth (not illustrated) of the driven rotor 28 can be engaged with each other.
  • the rotor housing 13 (second housing 13 b ) has an suction port 31 for drawing a fluid into the pump chamber 15 , and a discharge port 32 for discharging the fluid transferred in the pump chamber 15 to a position opposite to the intake port 31 .
  • the driving of the electric motor 19 causes the driving shaft 21 to rotate, so that the driven shaft 22 is rotated in a direction different from that of the driving shaft 21 through engagement between the driving gear 25 and the driven gear 26 .
  • the driving rotor 27 and the driven rotor 28 synchronously rotate with a phase difference (90 degrees) of the driving shaft 21 and the driven shaft 22 .
  • the fluid is drawn into the pump chamber 15 from the suction port 31 in accordance with the synchronous rotation of the driving rotor 27 and the driven rotor 28 .
  • the outer surfaces of the rotors 27 and 28 cooperate with an inner peripheral surface 15 a of the pump chamber 15 to transfer the fluid drawn into the pump chamber 15 .
  • the transferred fluid is discharged to the exterior of the pump chamber 15 from the discharge port 32 .
  • the housing H of the electric roots-type pump 10 configured as described above is provided with first to fourth mounting members 41 a , 41 b , 41 c , and 41 d each serving as a mounting member.
  • Each of the mounting members 41 a , 41 b , 41 c , and 41 d is used to mount the electric roots-type pump 10 to a body Bd serving as a body to be mounted that forms a fuel cell system mounted in a fuel cell powered vehicle.
  • the first mounting member 41 a is provided so as to extend in the leftward direction from an outer peripheral surface 17 a of the motor housing 17 .
  • the second mounting member 41 b is provided so as to extend rightward from the outer peripheral surface 17 a of the motor housing 17 .
  • the third mounting member 41 c is provided so as to extend leftward from an outer peripheral surface 131 b of the second housing 13 b .
  • the fourth mounting member 41 d is provided so as to extend rightward from the outer peripheral surface 131 b of the second housing 13 b .
  • the first mounting member 41 a and the second mounting member 41 b are disposed at positions opposing to each other in the right-left direction.
  • the third mounting member 41 c and the fourth mounting member 41 d are disposed at positions opposing each other in the right-left direction.
  • the first mounting member 41 a has an insertion hole 411 a having a circular shape through which a bolt B (see FIGS. 2A and 2B ) is inserted.
  • the bolt B is inserted into the insertion hole 411 a and fastened to the body Bd, thereby fastening the first mounting member 41 a with respect to the body Bd rigidly.
  • the second mounting member 41 b has a cylindrical mounting portion 43 .
  • a lower portion of the mounting portion 43 is inserted into an insertion recess 51 .
  • the insertion recess 51 is defined by a surface Bd 1 of the body Bd and has a circular cross-sectional area.
  • An insertion hole 42 having a circular shape is formed within the mounting portion 43 and the bolt B is inserted through the insertion hole 42 .
  • a diameter L 1 of the insertion hole 42 is larger than a diameter L 2 of a shaft portion B 1 of the bolt B.
  • a first gap S 1 is formed over the circumference in the circumferential direction between an inner peripheral surface 42 a defining the insertion hole 42 and an outer peripheral surface B 1 a of the shaft portion B 1 of the bolt B.
  • a groove 45 extending over the circumference is formed on an outer peripheral surface 43 a , which is an outer surface of the mounting portion 43 .
  • a seal member 48 is disposed in the groove 45 . A part of the seal member 48 projects toward the outside from the outer peripheral surface 43 a of the mounting portion 43 .
  • a diameter L 3 of the insertion recess 51 is larger than an outer diameter L 4 of the mounting portion 43 . Accordingly, a second gap S 2 is formed over the circumference in the circumferential direction between the outer peripheral surface 43 a of the mounting portion 43 and an inner peripheral surface 51 a of the insertion recess 51 .
  • Lubricant oil 60 is filled into the insertion recess 51 .
  • the lubricant oil 60 fills the insertion recess 51 to below a location where the seal member 48 is disposed to provide lubrication between the bottom surface 43 b of the mounting portion 43 and the bottom surface 51 b of the insertion recess 51 .
  • the seal member 48 seals the opening side of the insertion recess 51 relative to the area between the outer peripheral surface 43 a of the mounting portion 43 and the inner peripheral surface 51 a of the insertion recess 51 into which the lubricant is filled, thereby preventing the lubricant oil 60 from leaking out of the insertion recess 51 .
  • the bolt B is inserted into each insertion hole 42 and fastened to the body Bd, thereby fastening the second to fourth mounting members 41 b , 41 c , and 41 d to the body Bd. Fastening of the mounting members 41 a , 41 b , 41 c , and 41 d to the body Bd allows the electric roots-type pump 10 to be mounted to the body Bd.
  • a fuel cell system for example, electric power is generated by supplying oxygen and hydrogen to fuel cells, so that the temperature of each of the housing H and the body Bd rises due to heat generated by electric power generation. Along with the temperature rise, the housing H and the body Bd are thermally expanded.
  • the housing H and the body Bd are thermally expanded.
  • there occur a difference in temperature and also a difference in thermal expansion coefficients between the housing H and the body Bd there is a relative difference between the thermal expansion of the housing H and the thermal expansion of the body Bd.
  • the amount of deformation of the housing H due to the thermal expansion is different from that of the body Bd.
  • FIGS. 3A and 3B illustrate an example where the temperature of the housing H is higher than that of the body Bd and the amount of deformation of the housing H in a direction spaced apart from the first mounting member 41 a , i.e., the direction indicated by the arrow X 1 in FIG. 3A , is larger than the amount of deformation of the body Bd in a direction spaced apart from the first mounting member 41 a , i.e., the direction indicated by the arrow X 2 in FIG. 3A .
  • the bolt B is allowed to move along a direction orthogonal to the axial direction of the driving shaft 21 along with the thermal expansion of the body Bd within the insertion hole 42 by the amount corresponding to the first gap S 1 .
  • the bolt B is disposed within the insertion hole 42 at the position closer to the first mounting member 41 a than a central portion of the insertion hole 42 .
  • the mounting portion 43 of the second mounting member 41 b is allowed to move along the direction orthogonal to the axial direction of the driving shaft 21 from the first mounting member 41 a within the insertion recess 51 by the amount corresponding to the first gap S 1 and the second gap S 2 .
  • the mounting portion 43 is arranged within the insertion recess 51 at the position closer to the opposite side of the first mounting member 41 a than a central portion of the insertion recess 51 . That is, the bolt B and the mounting portion 43 move relative to each other in accordance with the difference between the amount of deformation of the housing H and the amount of deformation of the body Bd to suppress the load on the bolt B.
  • the seal member 48 is elastically deformed, thereby maintaining a seal between the outer peripheral surface 43 a of the mounting portion 43 and the inner peripheral surface 51 a of the insertion recess 51 and preventing the lubricant oil 60 from leaking out of the insertion recess 51 .
  • the mounting portion 43 of the third mounting member 41 c is allowed to deform so as to be spaced apart in the axial direction of the driving shaft 21 from the first mounting member 41 a within the insertion recess 51 by the amount corresponding to the first gap S 1 and the second gap S 2 .
  • the bolt B is allowed to move along the axial direction of the driving shaft 21 along with the deformation of the body Bd within the insertion hole 42 by the amount corresponding to the first gap S 1 .
  • the mounting portion 43 of the fourth mounting member 41 d is allowed to deform so as to intersect the axial direction of the driving shaft 21 from the first mounting member 41 a within the insertion recess 51 and to be spaced apart from the third mounting member 41 c , by an amount corresponding to the first gap S 1 and the second gap S 2 .
  • the bolt B is allowed to intersect the axial direction of the driving shaft 21 and move apart from the third mounting member 41 c along with the deformation of the body Bd within the insertion hole 42 , by an amount corresponding to the first gap S 1 . Accordingly, even when there occurs a difference between the amount of deformation of the housing H and that of the body Bd, a load applied to the bolt B is suppressed.
  • the lubricant oil 60 can provide excellent lubrication between the bottom surface 43 b of the mounting portion 43 and the bottom surface 51 b of the insertion recess 51 . Therefore, abrasion between the bottom surface 43 b of the mounting portion 43 and the bottom surface 51 b of the insertion recess 51 is suppressed.
  • Each of the second to fourth mounting members 41 b , 41 c , and 41 d includes the mounting portion 43 having the insertion hole 42 , and the mounting portion 43 is inserted into the insertion recess 51 of the surface Bd 1 to be mounted.
  • the first gap S 1 is formed between the insertion hole 42 and the bolt B, and the second gap S 2 is formed between the mounting portion 43 and the insertion recess 51 .
  • the lubricant oil 60 is filled into the insertion recess 51 .
  • the bolt B when there occurs a difference between the amount of deformation due to thermal expansion of the housing H and that of the body Bd, the bolt B is allowed to move within the insertion hole 42 along with the thermal expansion of the body Bd by the amount corresponding to the first gap S 1 , and the mounting portion 43 is allowed to move within the insertion recess 51 by the amount corresponding to the first gap S 1 and the second gap S 2 . Therefore, even when there occurs a difference between the amount of deformation of the housing H and that of the body Bd, a load applied to the bolt B can be suppressed. Consequently, deformation of the housing H can be suppressed, and an axial displacement of each of the bearings 23 a and 23 b , and 23 c for supporting the driving shaft 21 and the driven shaft 22 can be suppressed as much as possible.
  • the lubricant oil 60 is filled into the insertion recess 51 . Accordingly, even when there occurs a difference between the amount of deformation of the housing H and that of the body Bd and the mounting portion 43 moves within the insertion recess 51 so that the bottom surface 43 b of the mounting portion 43 and the bottom surface 51 b defining the insertion recess 51 come into sliding contact with each other, the lubricant oil 60 can provide excellent lubrication between the bottom surface 43 b of the mounting portion 43 and the bottom surface 51 b of the insertion recess 51 .
  • the seal member 48 is disposed on the opening side of the insertion recess 51 relative to the area between the mounting portion 43 and the insertion recess 51 in which the lubricant oil 60 is filled. Accordingly, the seal member 48 seals a section on the opening side of the insertion recess 51 relative to the area between the mounting portion 43 and the insertion recess 51 in which the lubricant oil 60 is filled, so that the seal member 48 can prevent the lubricant oil 60 , which is filled into the insertion recess 51 , from leaking out of the insertion recess 51 .
  • the seal member 48 can prevent collision of the outer peripheral surface 43 a of the mounting portion 43 against the inner peripheral surface 51 a of the insertion recess 51 .
  • the temperature of the housing H is higher than that of the body Bd, and the amount of deformation of the housing H in the direction spaced apart from the first mounting member 41 a is larger than the amount of deformation of the body Bd in the direction spaced apart from the first mounting member 41 a .
  • the present invention is not limited thereto.
  • FIGS. 4A and 4B illustrate an example where the temperature of the housing H is lower than that of the body Bd, and the amount of deformation of the housing H in a direction spaced apart from the first mounting member 41 a , i.e., the direction indicated by the arrow X 3 in FIG. 4A , is smaller than the amount of deformation of the body Bd in the direction spaced apart from the first mounting member 41 a , i.e., the direction indicated by the arrow X 4 in FIG. 4A .
  • the mounting portion 43 of the second mounting member 41 b is allowed to deform so as to be spaced apart in a direction orthogonal to the axial direction of the driving shaft 21 from the first mounting member 41 a within the insertion recess 51 by the amount corresponding to the first gap S 1 and the second gap S 2 .
  • the mounting portion 43 is disposed closer to the first mounting member 41 a than a central portion of the insertion recess 51 within the insertion recess 51 .
  • the bolt B is allowed to move along a direction orthogonal to the axial direction of the driving shaft 21 along with the deformation of the body Bd within the insertion hole 42 , by the amount corresponding to the first gap S 1 . Specifically, since the amount of deformation of the housing H is smaller than the amount of deformation of the body Bd, the bolt B is arranged apart from the first mounting member 41 a than a central portion of the insertion hole 42 within the insertion hole 42 .
  • a groove extending over the circumference may be formed in the inner peripheral surface 51 a of the insertion recess 51 , and a seal member may be disposed in this groove.
  • the first mounting member 41 a does not necessarily have to be rigidly fastened with respect to the body Bd. That is, the structure for mounting the first mounting member 41 a may be the same as that of the second mounting member 41 b.
  • Two, three, or five or more mounting members may be provided for the housing H.
  • the present invention is embodied as an electric roots-type pump 10 , but the present invention is not limited thereto.
  • the present invention may also be embodied as other pump or compressor types such as a scroll-type compressor, a screw-type compressor, or a piston-type compressor.
  • the present invention is embodied as an electric roots-type pump 10 using the electric motor 19 , but the present invention is not limited thereto.
  • the present invention may also be embodied as a pump using an engine as a drive source.
  • the pump can be mounted in a hybrid vehicle, or a vehicle that is driven only by the engine, and is mounted to the engine of the vehicle, with the body forming an engine compartment, or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Details Of Reciprocating Pumps (AREA)
US13/418,820 2011-03-25 2012-03-13 Pump mounting structure Abandoned US20120244021A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011067924A JP5252020B2 (ja) 2011-03-25 2011-03-25 ポンプの取付構造
JP2011-067924 2011-03-25

Publications (1)

Publication Number Publication Date
US20120244021A1 true US20120244021A1 (en) 2012-09-27

Family

ID=45936821

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/418,820 Abandoned US20120244021A1 (en) 2011-03-25 2012-03-13 Pump mounting structure

Country Status (4)

Country Link
US (1) US20120244021A1 (ja)
EP (1) EP2508709A3 (ja)
JP (1) JP5252020B2 (ja)
CN (1) CN102691662B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9927032B2 (en) 2014-11-14 2018-03-27 T & E Pumps, Ltd. Direct drive assembly for pump assembly
US20180342920A1 (en) * 2017-05-25 2018-11-29 Toyota Jidosha Kabushiki Kaisha Vehicle electric motor housing device
US11754070B2 (en) * 2019-01-11 2023-09-12 Bricks Group, Llc Pump device, especially for mobile means of transport

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7159086B2 (ja) * 2019-03-12 2022-10-24 ジーエムシーシー アンド ウェリング アプライアンス コンポーネント （タイランド） カンパニー リミテッド 圧縮機及びこれを備える機器
CN110307156A (zh) * 2019-07-15 2019-10-08 烟台菱辰能源有限公司 一种氢气循环泵及电机总成
CN114033678A (zh) * 2021-12-03 2022-02-11 北京航天石化技术装备工程有限公司 无润滑油脂窜漏的高洁净度电动回转容积泵及工作方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130827A (en) * 1937-01-14 1938-09-20 Clare L Brackett Lock nut
US5586854A (en) * 1994-08-19 1996-12-24 Yazaki Corporation Connector fastening nut and bolt-nut fastened connector
US20040265146A1 (en) * 2003-06-06 2004-12-30 Masanao Kagami Roots compressor module
US20090151389A1 (en) * 2007-12-18 2009-06-18 Masao Iguchi Motor-driven compressor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01182585A (ja) * 1988-01-13 1989-07-20 Komatsu Ltd プラスチック製ギヤポンプ
DE9003770U1 (de) * 1990-03-31 1990-06-13 KNF Neuberger GmbH, 7800 Freiburg Befestigungselement
JP2921437B2 (ja) * 1995-04-12 1999-07-19 トヨタ自動車株式会社 締結構造
DE19926585B4 (de) * 1999-06-11 2005-07-07 Deutsches Zentrum für Luft- und Raumfahrt e.V. Konstruktionselement in Hybridbauweise
JP4462430B2 (ja) * 2005-05-31 2010-05-12 株式会社不二越 ポンプユニット
JP2007327478A (ja) * 2006-06-09 2007-12-20 Toyota Motor Corp オイルポンプ
DE202007011491U1 (de) * 2007-08-16 2007-10-18 Acument Gmbh & Co. Ohg Vorrichtung zur Befestigung von Kunststoffteilen an einer Kraftfahrzeugkarosserie
US8281603B2 (en) * 2008-08-11 2012-10-09 United Technologies Corporation Fastener assembly for connecting rocket engine nozzles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130827A (en) * 1937-01-14 1938-09-20 Clare L Brackett Lock nut
US5586854A (en) * 1994-08-19 1996-12-24 Yazaki Corporation Connector fastening nut and bolt-nut fastened connector
US20040265146A1 (en) * 2003-06-06 2004-12-30 Masanao Kagami Roots compressor module
US20090151389A1 (en) * 2007-12-18 2009-06-18 Masao Iguchi Motor-driven compressor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9927032B2 (en) 2014-11-14 2018-03-27 T & E Pumps, Ltd. Direct drive assembly for pump assembly
US20180342920A1 (en) * 2017-05-25 2018-11-29 Toyota Jidosha Kabushiki Kaisha Vehicle electric motor housing device
US10581294B2 (en) * 2017-05-25 2020-03-03 Toyota Jidosha Kabushiki Kaisha Vehicle electric motor housing device
US11754070B2 (en) * 2019-01-11 2023-09-12 Bricks Group, Llc Pump device, especially for mobile means of transport

Also Published As

Publication number Publication date
CN102691662A (zh) 2012-09-26
JP5252020B2 (ja) 2013-07-31
JP2012202305A (ja) 2012-10-22
CN102691662B (zh) 2014-12-31
EP2508709A2 (en) 2012-10-10
EP2508709A3 (en) 2014-01-01

Similar Documents

Publication Publication Date Title
US20120244021A1 (en) Pump mounting structure
JP4918936B2 (ja) 電動ポンプ
EP2565376A2 (en) Electric pump unit
US20070182259A1 (en) Electric pump unit
JP5622033B2 (ja) 流体ポンプ
US9683567B2 (en) Electric oil pump
JP5502008B2 (ja) 内接歯車ポンプ
JP2015048872A (ja) 車輪駆動装置
US20120257997A1 (en) Air Compressor
JP2018038099A (ja) 電動モータ
JP2011190763A (ja) 回転式ポンプ
JP5969342B2 (ja) 電動オイルポンプ
JP2012189015A (ja) 電動ポンプユニット
JP5913028B2 (ja) 電動ポンプ
JP2013160046A (ja) 電動ポンプユニット
JP2012189011A (ja) ポンプおよび電動ポンプユニット
EP3567213A1 (en) Scroll compressor
JP5803183B2 (ja) ポンプおよび電動ポンプユニット
JP2014043793A (ja) 電動圧縮機
JP2016038086A (ja) 車輪駆動装置
WO2012144489A1 (ja) スクロール型流体機械
JP2012163120A (ja) 動力伝達装置
JP2008014283A (ja) スクロール圧縮機
JP2011231687A (ja) スクロール圧縮機
JP2012225263A (ja) 電動ポンプユニット

Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:UMEYAMA, RYO;YAMADA, KAZUHO;HOSHINO, TATSUYUKI;REEL/FRAME:027854/0857

Effective date: 20120306

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO PAY ISSUE FEE