US20190301452A1 - Vane pump - Google Patents

Vane pump Download PDF

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Publication number
US20190301452A1
US20190301452A1 US16/344,681 US201716344681A US2019301452A1 US 20190301452 A1 US20190301452 A1 US 20190301452A1 US 201716344681 A US201716344681 A US 201716344681A US 2019301452 A1 US2019301452 A1 US 2019301452A1
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US
United States
Prior art keywords
pump
rotor
projection
side plate
hole
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
US16/344,681
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English (en)
Inventor
Koichiro Akatsuka
Yoshiyuki Maki
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.)
KYB Corp
Original Assignee
KYB 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 KYB Corp filed Critical KYB Corp
Assigned to KYB CORPORATION reassignment KYB CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAKI, YOSHIYUKI, AKATSUKA, KOICHIRO
Publication of US20190301452A1 publication Critical patent/US20190301452A1/en
Abandoned legal-status Critical Current

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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
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0818—Vane tracking; control therefor
    • F01C21/0827—Vane tracking; control therefor by mechanical means
    • F01C21/0836—Vane tracking; control therefor by mechanical means comprising guiding means, e.g. cams, rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • 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
    • F04C15/0023—Axial sealings for working fluid
    • 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
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • 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
    • F04C2240/20—Rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the present invention relates to a vane pump.
  • JP2013-136965A discloses an electric vane pump including an electric motor and a vane pump that is driven by a motive force from the electric motor.
  • the electric vane pump disclosed in JP2013-136965A may be produced by assembling the electric motor and the vane pump after the electric motor and the vane pump have been fabricated separately. In such a case, the electric motor and the vane pump are assembled by inserting a shaft of the electric motor into a through hole of a rotor of the vane pump.
  • An object of the present invention is to improve assemblability of a vane pump.
  • a vane pump includes: a rotor having a through hole to which a driving shaft is coupled; a plurality of vanes provided so as to be freely reciprocatable in a radial direction with respect to the rotor; a cam ring configured to accommodate the rotor, the cam ring being configured such that tip-ends of the vanes slide on an inner circumferential surface of the cam ring as the rotor is rotated; a housing configured to accommodate the rotor and the cam ring; and a side plate provided between the rotor and a bottom surface of the housing.
  • the side plate or the housing is formed with a projection, the projection being inserted into the through hole of the rotor.
  • FIG. 1 is a sectional view of a vane pump according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing a state before an electric motor and the vane pump are assembled.
  • FIG. 3 is a sectional view of the vane pump according to a modification of the first embodiment of the present invention.
  • FIG. 4 is a side view of a first side plate.
  • FIG. 5 is a sectional view of the vane pump according to a second embodiment of the present invention.
  • a vane pump 100 according to a first embodiment of the present invention will be described with reference to FIG. 1 .
  • the vane pump 100 is, for example, used as a hydraulic pressure source for supplying working oil (working fluid) to a hydraulic apparatus, such as a continuously variable transmission, etc., mounted on a vehicle.
  • the vane pump 100 is driven by a motive force from an electric motor 1 .
  • the vane pump 100 is coupled coaxially to the electric motor 1 via a driving shaft 4 .
  • the electric motor 1 includes the driving shaft 4 that is rotatably supported by a motor housing 3 via bearings 2 a and 2 b , a motor rotor 5 that has a plurality of permanent magnets arranged in the circumferential direction and that is fixed to the driving shaft 4 , and a stator 6 that is fixed to an inner circumference of the motor housing 3 and that is formed by winding a coil.
  • the motor rotor 5 and the stator 6 are arranged concentrically, and there is a small gap between the motor rotor 5 and the stator 6 .
  • the motor housing 3 includes a main body portion 3 a having a partially bottomed cylinder shape and a motor cover 3 b that closes an opening portion of the main body portion 3 a .
  • the vane pump 100 is connected to the motor cover 3 b .
  • the main body portion 3 a and the motor cover 3 b are assembled integrally by fitting an annular fitting portion 3 c formed in the motor cover 3 b into an inner circumferential surface of the main body portion 3 a.
  • the bearing 2 a is fixed to a bottom portion of the main body portion 3 a
  • the bearing 2 b is fixed to an inner circumferential surface of a hollow portion 3 d of the motor cover 3 b
  • the driving shaft 4 is rotatably supported by two bearings 2 a and 2 b and is provided so as to extend by being inserted through the hollow portion 3 d of the motor cover 3 b .
  • the driving shaft 4 is configured not as a part of the vane pump 100 , but as a part of the electric motor 1 .
  • the vane pump 100 includes a pump rotor 31 that is coupled to the driving shaft 4 , a plurality of vanes 32 that are provided so as to be freely reciprocatable in the radial direction with respect to the pump rotor 31 , a cam ring 33 that accommodates the pump rotor 31 and has an inner circumferential cam face on which tip-ends of the vanes 32 slide as the pump rotor 31 is rotated, and a pump housing 40 that accommodates the pump rotor 31 and the cam ring 33 .
  • the driving shaft 4 is supported only by the bearings 2 a and 2 b provided in the electric motor 1 , and a bearing for supporting the driving shaft 4 is not provided in the vane pump 100 .
  • a male spline 4 a is formed on an outer circumferential surface of an end portion of the driving shaft 4 on the vane pump 100 side.
  • the pump rotor 31 is an annular member, and a through hole 31 a , through which the driving shaft 4 is inserted, is formed at the center portion of the pump rotor 31 so as to penetrate therethrough in the axial direction.
  • a female spline 31 b is formed on an inner circumferential surface of the through hole 31 a (see FIG. 2 ), and the male spline 4 a of the driving shaft 4 meshes with the female spline 31 b .
  • the driving shaft 4 is coupled to the pump rotor 31 with a spline connection.
  • illustration of the female spline 31 b is omitted.
  • a plurality of pump chambers 34 are defined by an outer circumferential surface of the pump rotor 31 , the cam face of the cam ring 33 , and adjacent vanes 32 .
  • the cam ring 33 is an annular member having the substantially oval shaped cam face with a minor axis and a major axis.
  • the cam face of the cam ring 33 has two suction regions in which volumes of the pump chambers 34 are increased with the rotation of the pump rotor 31 and two discharge regions in which the volumes of the pump chambers 34 are decreased with the rotation of the pump rotor 31 .
  • a first side plate 36 is arranged so as to be in contact with one side surfaces of the pump rotor 31 and the cam ring 33
  • a second side plate 37 is arranged so as to be in contact with the other side surfaces of the pump rotor 31 and the cam ring 33 .
  • the first side plate 36 and the second side plate 37 are arranged so as to sandwich the pump rotor 31 and the cam ring 33 from both sides thereof, and thereby, the pump chambers 34 are defined.
  • the first side plate 36 is arranged between the pump rotor 31 and a bottom surface 40 b of the pump housing 40 .
  • the second side plate 37 is arranged between the pump rotor 31 and the motor cover 3 b.
  • the pump rotor 31 , the cam ring 33 , the first side plate 36 , and the second side plate 37 are accommodated in a pump accommodating portion 40 a that is formed in the pump housing 40 so as to have a recessed shape.
  • the pump housing 40 and the motor cover 3 b are fastened together with bolts, and an opening portion of the pump accommodating portion 40 a is closed the motor cover 3 b of the motor housing 3 .
  • the first side plate 36 is a disc-shaped member, and has two arc-shaped discharge ports 36 a that are formed so as to penetrate through the first side plate 36 .
  • the discharge ports 36 a open so as to correspond to the discharge regions of the cam ring 33 , and discharge the working oil in the pump chambers 34 .
  • a projection 50 which is inserted into the through hole 31 a of the pump rotor 31 , is formed on the first side plate 36 so as to be integral with the first side plate 36 .
  • the projection 50 is formed so as to project from the center portion of a side surface of the first side plate 36 and so as to have a cylinder shape concentric with the through hole 31 a of the pump rotor 31 .
  • a gap is formed between an outer circumferential surface 50 a of the projection 50 and the inner circumferential surface of the through hole 31 a , and a gap is also formed between an end surface 50 b of the projection 50 and an end surface 4 b of the driving shaft 4 .
  • the projection 50 does not come into contact with the driving shaft 4 and the pump rotor 31 .
  • a function of the projection 50 will be described later in detail.
  • the second side plate 37 is an annular member, and a through hole 37 a , through which the driving shaft 4 is inserted, is formed at the center portion of the second side plate 37 so as to penetrate therethrough in the axial direction.
  • two ark-shaped suction ports (not shown) are formed by being cut out in an outer circumference of the second side plate 37 .
  • the two suction ports open so as to correspond to the two suction regions of the cam ring 33 , and guide the working oil to the pump chambers 34 .
  • the second side plate 37 is not essential to the configuration of the vane pump 100 , and it may be possible to omit the second side plate 37 . In such a case, the pump rotor 31 and the cam ring 33 are sandwiched by the first side plate 36 and the motor cover 3 b from both sides, and thereby, the pump chambers 34 are defined.
  • Relative rotation between the cam ring 33 , the first side plate 36 , and the second side plate 37 is restricted by two positioning pins 46 .
  • the suction regions of the cam ring 33 and the suction ports of the second side plate 37 are aligned, and the discharge regions of the cam ring 33 and the discharge ports 36 a of the first side plate 36 are aligned.
  • the positioning pins 46 are inserted through the cam ring 33 and the second side plate 37 such that one end sides thereof are inserted into positioning holes 36 d that are formed in the first side plate 36 and the other end sides thereof are inserted into positioning holes 3 e that are formed in the motor cover 3 b .
  • the cam ring 33 , the first side plate 36 , and the second side plate 37 are aligned by the positioning pins 46 with respect to the motor cover 3 b.
  • An inner circumferential surface of the hollow portion 3 d of the motor cover 3 b is provided with a seal member 45 with which an outer circumferential surface of the driving shaft 4 is in sliding contact. Leakage of the working oil from the vane pump 100 to the electric motor 1 is prevented by the seal member 45 .
  • An annular high-pressure chamber 42 that communicates with the discharge ports 36 a of the first side plate 36 is formed in the bottom surface 40 b of the pump accommodating portion 40 a .
  • the high-pressure chamber 42 is defined by the first side plate 36 that is arranged on the bottom surface 40 b of the pump accommodating portion 40 a .
  • the high-pressure chamber 42 communicates with a discharge passage 41 that is formed so as to open at an outer surface of the pump housing 40 .
  • a suction passage (not shown) that communicates with the suction ports of the second side plate 37 is also formed in the pump housing 40 .
  • the suction passage communicates with a tank that stores the working oil.
  • the pump rotor 31 coupled to the driving shaft 4 is rotated, and thereby, the respective pump chambers 34 in the cam ring 33 suck the working oil through the suction ports of the second side plate 37 and discharge the working oil to the high-pressure chamber 42 through the discharge ports 36 a of the first side plate 36 .
  • the working oil in the high-pressure chamber 42 is supplied to a hydraulic apparatus through the discharge passage 41 .
  • the respective pump chambers 34 in the cam ring 33 suck and discharge the working oil by expansion and contraction caused by the rotation of the pump rotor 31 .
  • FIG. 2 is a diagram showing a state before the electric motor 1 and the vane pump 100 are assembled. As shown in FIG. 2 , a description will be given of a case in which the electric motor 1 and the vane pump 100 are assembled in a state where the driving shaft 4 of the electric motor 1 is orientated perpendicular to the vertical direction.
  • the assembly of the electric motor 1 and the vane pump 100 is performed by inserting the driving shaft 4 of the electric motor 1 into the through hole 31 a of the pump rotor 31 of the vane pump 100 , inserting the positioning pins 46 of the vane pump 100 into the positioning holes 3 e of the motor cover 3 b , and thereafter, fastening the pump housing 40 and the motor cover 3 b with bolts. A detailed described is given below.
  • the pump rotor 31 In the vane pump 100 , before the electric motor 1 and the vane pump 100 are assembled, the pump rotor 31 is not fixed and is in a freely movable state in the cam ring 33 , and so, the pump rotor 31 falls into a bottom portion in the cam ring 33 due to gravity. In this case, the pump rotor 31 moves in the vertical direction relative to the second side plate 37 , and the position of the through hole 31 a of the pump rotor 31 is deviated from the position of the through hole 37 a of the second side plate 37 . Thus, a state in which a part of the through hole 37 a of the second side plate 37 is blocked by the side surface of the pump rotor 31 is brought about.
  • the first side plate 36 of the vane pump 100 is formed with the projection 50 that is to be inserted into the through hole 31 a of the pump rotor 31 .
  • the inner circumferential surface of the through hole 31 a of the pump rotor 31 is brought into contact with the outer circumferential surface 50 a of the projection 50 , and thereby, the pump rotor 31 is supported by the projection 50 to restrict the fall of the pump rotor 31 in the cam ring 33 .
  • the positional deviation between the through hole 31 a of the pump rotor 31 and the through hole 37 a of the second side plate 37 becomes small.
  • the positional deviation between the through hole 31 a of the pump rotor 31 and the through hole 37 a of the second side plate 37 corresponds to the gap between the outer circumferential surface 50 a of the projection 50 and the inner circumferential surface of the through hole 31 a in a state in which the electric motor 1 and the vane pump 100 are assembled (the state shown in FIG. 1 ).
  • the projection 50 is arranged concentrically with the through hole 31 a of the pump rotor 31 , and the gap is formed between the outer circumferential surface 50 a of the projection 50 and the inner circumferential surface of the through hole 31 a .
  • the gap is also formed between the end surface 50 b of the projection 50 and the end surface 4 b of the driving shaft 4 . Therefore, when the driving shaft 4 and the pump rotor 31 are rotated, the projection 50 does not interfere with the driving shaft 4 and the pump rotor 31 .
  • the projection 50 has a function of aligning the pump rotor 31 in the cam ring 33 and facilitating the insertion of the driving shaft 4 into the through hole 31 a when the driving shaft 4 is inserted into the through hole 31 a of the pump rotor 31 .
  • the pump rotor 31 is aligned in the cam ring 33 by the projection 50 when the driving shaft 4 is inserted into the through hole 31 a of the pump rotor 31 .
  • the centers of the pump rotor 31 and the cam ring 33 are prevented from being deviated greatly, and thereby, it is possible to improve the assemblability of the vane pump 100 .
  • the projection 50 is formed integrally with the first side plate 36 .
  • the projection 50 may be formed separately from the first side plate 36 .
  • the cylinder-shaped projection 50 may be press-fitted into a groove 36 b formed in the side surface of the first side plate 36 .
  • the side surface of the first side plate 36 on which the pump rotor 31 slides needs to be polished in order to improve sliding property of the pump rotor 31 .
  • the projection 50 is formed integrally with the first side plate 36 , it is difficult to perform this polishing operation.
  • the projection 50 is formed separately from the first side plate 36 , because the first side plate 36 can be polished before press-fitting the projection 50 into the groove 36 b of the first side plate 36 , workability of the polishing operation is improved.
  • FIG. 4 is a side view of the first side plate 36 viewed from the pump rotor 31 side. Three projections 51 are formed at 120 degree intervals on the same circle.
  • the configuration is not limited to that in which the driving shaft 4 is rotated by the motive force from the electric motor 1 .
  • a configuration in which the driving shaft 4 is rotated by a motive force from an engine may also be possible.
  • the vane pump 100 is not limited to the configuration in which the vane pump 100 is assembled with the electric motor 1 .
  • a vane pump 200 according to a second embodiment of the present invention will be described with reference to FIG. 5 .
  • differences from the above-described first embodiment will be mainly described, and components that are the same as those in the vane pump 100 according to the above-described first embodiment are assigned the same reference numerals and descriptions thereof will be omitted.
  • illustration of the electric motor 1 is omitted.
  • a projection 60 that is to be inserted into the through hole 31 a of the pump rotor 31 is formed on the pump housing 40 .
  • the projection 60 is formed integrally with the pump housing 40 so as to project from the center portion of the bottom surface 40 b of the pump housing 40 .
  • the projection 60 is formed so as to be inserted through a through hole 36 c formed in the first side plate 36 and so as to have a cylinder shape concentric with the through hole 31 a of the pump rotor 31 .
  • a gap is formed between an outer circumferential surface 60 a of the projection 60 and the inner circumferential surface of the through hole 31 a , and a gap is also formed between an end surface 60 b of the projection 60 and the end surface 4 b of the driving shaft 4 .
  • the projection 60 does not come into contact with the driving shaft 4 and the pump rotor 31 .
  • the projection 60 may be formed separately from the pump housing 40 and may be press-fitted into a groove formed in the bottom surface 40 b of the pump housing 40 .
  • a seal member 61 is provided between the bottom surface 40 b of the pump housing 40 and the first side plate 36 so as to surround an outer circumference of the projection 60 .
  • the vane pump ( 100 , 200 ) includes: the pump rotor 31 having the through hole 31 a to which the driving shaft 4 is coupled; the plurality of vanes 32 provided so as to be freely reciprocatable in the radial direction with respect to the pump rotor 31 ; the cam ring 33 configured to accommodate the pump rotor 31 , the cam ring 33 being configured such that the tip-ends of the vanes 32 slide on the inner circumferential surface of the cam ring 33 as the pump rotor 31 is rotated; the pump housing 40 configured to accommodate the pump rotor 31 and the cam ring 33 ; and the first side plate 36 provided between the pump rotor 31 and the bottom surface 40 b of the pump housing 40 , wherein the first side plate 36 or the pump housing 40 is formed with the projection ( 50 , 60 ), the projection ( 50 , 60 ) being inserted into the through hole 31 a of the pump rotor 31 .
  • the projection ( 50 , 60 ) is configured such that the pump rotor 31 is aligned in the cam ring 33 when the driving shaft 4 is inserted into the through hole 31 a of the pump rotor 31 .
  • the projection 50 is formed to have a cylinder shape concentric with the through hole 31 a of the pump rotor 31 , and a gap is formed between the outer circumferential surface 50 a of the projection 50 and the inner circumferential surface of the through hole 31 a , and a gap is formed between the end surface 50 b of the projection 50 and an end surface 4 b of the driving shaft 4 .
  • the projection 50 does not interfere with the driving shaft 4 and/or the pump rotor 31 .
  • the projection 50 is press-fitted into the groove 36 b formed in the side surface of the first side plate 36 .
  • the projection 50 is formed separately from the first side plate 36 , the first side plate 36 can be polished before the projection 50 is press-fitted into the groove 36 b of the first side plate 36 , and therefore, workability of the polishing operation is improved.
  • the projection 60 is provided so as to project from the bottom surface 40 b of the pump housing 40 and so as to be inserted through the through hole 36 c formed in the first side plate 36 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US16/344,681 2016-11-18 2017-11-08 Vane pump Abandoned US20190301452A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016-225216 2016-11-18
JP2016225216A JP6546895B2 (ja) 2016-11-18 2016-11-18 ベーンポンプ
PCT/JP2017/040168 WO2018092645A1 (ja) 2016-11-18 2017-11-08 ベーンポンプ

Publications (1)

Publication Number Publication Date
US20190301452A1 true US20190301452A1 (en) 2019-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US16/344,681 Abandoned US20190301452A1 (en) 2016-11-18 2017-11-08 Vane pump

Country Status (5)

Country Link
US (1) US20190301452A1 (ja)
JP (1) JP6546895B2 (ja)
CN (1) CN109863306B (ja)
DE (1) DE112017005841T5 (ja)
WO (1) WO2018092645A1 (ja)

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WO2020095768A1 (ja) 2018-11-09 2020-05-14 Ｋｙｂ株式会社 電動ポンプ
JP2020169577A (ja) 2019-04-01 2020-10-15 Ｋｙｂ株式会社 ベーンポンプ

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JP2016225216A (ja) 2015-06-02 2016-12-28 日立金属株式会社 ノイズ抑制ケーブル
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JP2018080687A (ja) 2018-05-24
JP6546895B2 (ja) 2019-07-17

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