US20140099227A1 - Pump apparatus - Google Patents

Pump apparatus Download PDF

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Publication number
US20140099227A1
US20140099227A1 US13/937,819 US201313937819A US2014099227A1 US 20140099227 A1 US20140099227 A1 US 20140099227A1 US 201313937819 A US201313937819 A US 201313937819A US 2014099227 A1 US2014099227 A1 US 2014099227A1
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United States
Prior art keywords
discharge passage
insertion hole
housing
pump apparatus
adjusting mechanism
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
US13/937,819
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English (en)
Inventor
Hideaki Takahashi
Yoshiki Sakamoto
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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Filing date
Publication date
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Assigned to HITACHI AUTOMOTIVE SYSTEMS, LTD. reassignment HITACHI AUTOMOTIVE SYSTEMS, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAKAMOTO, YOSHIKI, TAKAHASHI, HIDEAKI
Publication of US20140099227A1 publication Critical patent/US20140099227A1/en
Abandoned legal-status Critical Current

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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F04C11/003—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function

Definitions

  • This invention relates to a pump apparatus arranged to discharge a desired hydraulic pressure by a pump.
  • U.S. Patent Application Publication No. 2011/0062773 A1 discloses a conventional pump apparatus in which a center plate is assembled to a housing, and a discharge portion received in a receiving hole formed in the housing is inserted into the center plate, so that a discharge passage confronts a low pressure chamber, so as to decrease a size of the pump unit.
  • an object of the present invention to provide a pump apparatus devised to solve the above-mentioned problem, and readily assemble the pump apparatus while suppressing error.
  • a pump apparatus comprises: a housing; a pump unit received within a receiving portion which is formed in the housing, and which constitutes a low pressure chamber; a suction passage which is opened in an outer circumference of the pump unit, and which is arranged to supply a hydraulic fluid into the pump unit; a discharge passage member including a discharge hydraulic passage which is formed therein, and which is arranged to discharge the hydraulic fluid pressurized by the pump unit to an outside of the housing; a first discharge passage insertion hole which is formed in the pump unit, and into which the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the discharge passage member is inserted through an elastic member; and an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member within the first discharge passage insertion hole and the second discharge passage insertion hole.
  • a pump apparatus comprises: a housing; a pump unit received within a receiving portion which is formed in the housing, and which constitutes a low pressure chamber; a discharge passage which is arranged to discharge a hydraulic fluid pressurized by the pump unit, through the housing to an outside of the housing; a discharge passage member which constitutes the discharge passage, and which includes a discharge hydraulic passage formed therein; a first discharge passage insertion hole which is formed in the pump unit, and into which an one end portion of the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the other end portion of the discharge passage member is inserted through an elastic member; an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member with respect to the first discharge passage insertion hole and the second discharge passage insertion hole; and the first discharge passage insertion hole and the discharge passage member being disposed with a predetermined radial gap therebetween, the second discharge passage insertion hole and the discharge passage member being disposed with
  • a pump apparatus comprises: a housing; a pump unit which is received in a receiving portion formed in the housing, and which includes a low pressure portion and a high pressure portion formed therein; a suction passage formed in the housing, and arranged to supply a hydraulic fluid to the low pressure portion of the pump unit; a low pressure chamber connected with the suction passage and the low pressure portion, and formed between the pump unit and a wall portion forming the receiving portion when the pump unit is received in the receiving portion; a discharge passage arranged to discharge the hydraulic fluid pressurized by the pump unit; a connection pipe which constitutes the discharge passage, and which passes through the low pressure chamber, and which connects the housing and the high pressure chamber, a first connection pipe insertion hole which is formed in the pump unit, and into which the connection pipe is inserted through an elastic member; a second connection pipe insertion hole which is formed in the housing, and into which the connection pipe is inserted through the elastic member; an axial position adjusting mechanism arranged to adjust an axial position of the connection
  • FIG. 1 is a hydraulic pressure circuit diagram showing a brake hydraulic pressure control apparatus to which a pump apparatus according to a first embodiment of the present invention is applicable.
  • FIGS. 2A-2C are skeleton diagrams showing a housing of a hydraulic pressure control unit in the brake hydraulic pressure control apparatus of FIG. 1 .
  • FIGS. 3A-3C are skeleton diagrams showing the housing when viewed from directions different from FIGS. 2A-2C .
  • FIG. 4 is a perspective view showing the housing of FIGS. 2A-2C and FIG. 3A-3C .
  • FIG. 5 is a perspective view showing the housing of FIGS. 2A-2C and FIG. 3A-3C .
  • FIG. 6 is a perspective view showing the housing of FIGS. 2A-2C and FIG. 3A-3C .
  • FIG. 7 is a perspective view showing a pump unit and discharge portions in the pump apparatus according to the first embodiment of the present invention.
  • FIG. 8 is a sectional view showing a portion in a state where the pump unit and the discharge portions are received within the housing, in the pump apparatus according to the first embodiment of the present invention.
  • FIG. 9 is a sectional view taken along a section line A-A of FIG. 8 .
  • FIG. 10 is an enlarged sectional view showing a portion near the discharge portion.
  • FIG. 11 is an enlarged sectional view showing a portion near a discharge portion in a pump apparatus according to a second embodiment of the present invention.
  • FIG. 12 is an enlarged sectional view showing a portion near a discharge portion in a pump apparatus according to a third embodiment of the present invention.
  • FIG. 13 is an enlarged sectional view showing a portion near a discharge portion in a pump apparatus according to a fourth embodiment of the present invention.
  • FIG. 1 is a hydraulic pressure circuit diagram showing a brake hydraulic pressure control apparatus 32 .
  • the hydraulic pressure circuit is formed within a hydraulic pressure control unit 30 provided between a master cylinder M/C and wheel cylinders W/C.
  • FIG. 2 and FIG. 3 are skeleton diagrams of a housing 31 of a hydraulic pressure control unit 30 .
  • FIG. 2 and FIG. 3 show a state in which valves, the control unit, and a motor M are detached for facilitating the understanding.
  • This brake hydraulic pressure control apparatus 32 performs a hydraulic pressure control in accordance with a desired hydraulic pressure for a Vehicle Dynamics Control (hereinafter, referred to as a VDC), and an Anti-lock Brake System (hereinafter, referred to as ABS) from a controller.
  • Brake hydraulic pressure control apparatus 32 has an x-piping system having two systems including a brake hydraulic pressure circuit 21 P of a P system and a brake hydraulic pressure circuit 21 S of an S system.
  • the P system is connected with a wheel cylinder W/C(FL) of a left front wheel, and a wheel cylinder W/C(RR) of a right rear wheel.
  • the S system is connected with a wheel cylinder W/C(FR) of a right front wheel, and a wheel cylinder W/C(RL) of a left rear wheel.
  • Brake hydraulic pressure control apparatus 32 and wheel cylinders W/C are connected with wheel cylinder ports 19 ( 19 RL, 19 FR, 19 FL, and 19 RR) formed on an upper surface 31 c of housing 31 described later.
  • a pump unit P is a tandem gear pump including a gear pump PP in the P system, and a gear pump PS in the S system.
  • Master cylinder M/C and hydraulic pressure control unit 30 are connected with each other by fluid passages 18 P and 18 S through master cylinder ports 20 P and 20 S formed on a port connection surface 31 a 1 of housing 31 described later. These fluid passages 18 ( 18 P and 18 S) and a suction side of pump unit P are connected by fluid passages 10 P and 10 S. Moreover, there is provided a master cylinder pressure sensor 22 provided on fluid passage 18 P between master cylinder port 20 P, and a connection portion between fluid passage 18 P and fluid passage 10 P.
  • a discharge side of pump unit P and wheel cylinders W/C are connected, respectively, by fluid passages 11 P and 11 S.
  • pressure increasing valves 3 FL, 3 RR, 3 FR, and 3 RL which are normally-open solenoid valves corresponding to wheel cylinders W/C, and which are provided on fluid passages 11 ( 11 P and 11 S).
  • check valves 6 6 P and 6 S which are provided on fluid passages 11 ( 11 P and 11 S) between pressure increasing valves 3 ( 3 FL and 3 RR, and 3 FR and 3 RL) and pump unit P.
  • Each of check valves 6 is arranged to allow a flow of a brake hydraulic pressure in a direction from pump unit P toward the corresponding pressure increasing valve 3 , and to prohibit a flow of the brake hydraulic pressure in an opposite direction from the corresponding pressure increasing valve 3 to pump unit P.
  • discharge pressure sensors 23 P and 23 S disposed on fluid passages 11 ( 11 P and 11 S) between pressure increasing valves 3 ( 3 FL and 3 RR, and 3 FR and 3 RL) and pump unit P.
  • fluid passages 16 FL, 16 RR, 16 FR, and 16 RL which are disposed on fluid passages 11 ( 11 P and 11 S), and which bypass the corresponding pressure increasing valves 3 , respectively.
  • check valves 9 FL, 9 RR, 9 FR, and 9 RL which are disposed, respectively, on fluid passages 16 ( 16 FL, 16 RR, 16 FR, and 16 RL).
  • Each of check valves 9 ( 9 FL, 9 RR, 9 FR, and 9 RL) is arranged to allow a flow of the brake hydraulic pressure in a direction from the corresponding wheel cylinder W/C to pump unit P, and to prohibit a flow of the brake hydraulic pressure in an opposite direction from pump unit P to the corresponding wheel cylinder W/C.
  • Master cylinder M/C and fluid passages 11 are connected by fluid passages 12 P and 12 S. Fluid passages 11 and fluid passages 12 are joined between pump unit P and the corresponding pressure increasing valves 3 .
  • gate out valves 2 P and 2 S which are normally open solenoid valves, and which are disposed on fluid passages 12 .
  • fluid passages 17 P and 17 S which are disposed on fluid passages 12 , and which bypass the respective gate out valves 2 ( 2 P and 2 S).
  • check valves 8 P and 8 S which are disposed on fluid passages 17 ( 17 P and 17 S).
  • Each of check valves 8 P and 8 S is arranged to allow a flow of the brake hydraulic pressure in a direction from the master cylinder M/C's side toward the corresponding wheel cylinders W/C, and to prohibit a flow of the brake hydraulic pressure in an opposite direction from the corresponding wheel cylinders W/C toward the master cylinder M/C's side.
  • reservoir 15 P and 15 S which are disposed on the suction side of pump unit P. These reservoirs 15 P and 15 S and pump unit P are connected by fluid passages 14 P and 14 S. There are provided check valves 7 P and 7 S which are disposed between reservoirs 15 ( 15 P and 15 S) and pump unit P. Wheel cylinders W/C and fluid passages 14 ( 14 P and 14 S) are connected by fluid passages 13 P and 13 S. Fluid passages 13 ( 13 P and 13 S) and fluid passages 14 are joined between check valves 7 ( 7 P and 7 S), and reservoirs 15 ( 15 P and 15 S). There are provided pressure decreasing valves 4 FL, 4 RR, 4 FR, and 4 RL which are disposed on fluid passages 13 ( 13 P and 13 S), and which are normally-closed solenoid valves.
  • a surface on which master cylinder ports 20 are opened is a front surface 31 a
  • a back surface of front surface 31 a is a rear surface 31 b
  • a surface on which wheel cylinder ports 19 are opened is an upper surface 31 c.
  • a back surface of upper surface 31 c is a lower surface 31 d.
  • a side surface on a left side of front surface 31 a is a left side surface 31 e.
  • a side surface on a right side of front surface 31 a is a right side surface 31 f .
  • FIG. 2A is a view when housing 31 is viewed from front surface 31 a 's side.
  • FIG. 2B is a view when housing 31 is viewed from the upper surface 31 c 's side.
  • FIG. 2C is a view when housing 31 is viewed from the rear surface 31 d 's side.
  • FIG. 3A is a view when housing 31 is viewed from the rear surface 31 b 's side.
  • FIG. 3B is a view when housing 31 is viewed from the right side surface 31 f 's side.
  • FIG. 3C is a view when housing 31 is viewed from the left side surface 31 e 's side.
  • FIG. 4 , FIG. 5 , and FIG. 6 are perspective views showing housing 31 .
  • FIG. 4 is a view when housing 31 is viewed from the rear surface 31 b 's side, the upper surface 31 c 's side, and the left side surface 31 e 's side.
  • FIG. 5 is a view when housing 31 is viewed from the front surface 31 a 's side, the upper surface 31 c 's side, and the left side surface 31 e 's side.
  • FIG. 6 is a view when a unit case 34 and motor M are attached.
  • Housing 31 has a substantially rectangular parallelepiped (rectangular solid) shape.
  • Motor M is mounted on the front surface 31 a 's side.
  • the solenoid valves of gate out valves 2 , pressure increasing valves 3 , and pressure decreasing valves 4 , and an electric unit arranged to drive the solenoid valves are mounted on the rear surface 31 b 's side.
  • the electric unit includes a circuit board arranged to perform a predetermined calculation in accordance with input signals of wheel speed sensors and so on which are attached to the vehicle.
  • the electric unit is arranged to output a predetermined electric signal to solenoids attached to the solenoid valves, and motor M. This electric unit is received within unit case 34 .
  • Housing 31 includes power supply holes which penetrate through front surface 31 a and rear surface 31 b. Electrodes of motor M are inserted into these power supply holes 24 , so that the electric unit and motor M are connected.
  • Housing 31 includes a valve mounting holes in which the solenoid valves are mounted by press fit or staking; a plurality of fluid passages which connect the ports and the solenoid valves; and holes in which ports (wheel cylinder ports 19 and master cylinder ports 20 ) connected with the cylinders (wheel cylinders W/C and master cylinders M/C), and reservoirs 15 are disposed. These holes, fluid passages, and so on are formed by drilling the respective surfaces from the outside of housing 31 .
  • Housing 31 includes a port connection surface 31 a 1 which is formed on front surface 31 a on the upper surface 31 c 's side, which has a surface normal on the motor M's side, and which is substantially parallel with front surface 31 a.
  • Port connection surface 31 a 1 is formed to protrude in a forward direction (the motor side in the axial direction of the motor drive shaft) from front surface 31 a.
  • Master cylinder ports 20 are formed on this port connection surface 31 a 1 .
  • Pump unit P is received within a substantially cylindrical receiving portion 41 which penetrates through housing 31 from front surface 31 a to rear surface 31 b .
  • This receiving portion 41 includes an opening portion which is on the rear surface 31 b 's side, and which is closed by a pump cover 35 .
  • housing 31 includes a discharge portion receiving hole 47 ( 47 P and 47 S) which extends from left side surface 31 e of housing 31 to right side surface 31 f of housing 31 , and which is substantially perpendicular to receiving portion 41 .
  • Discharge portions 48 ( 48 P and 48 S) are received within this discharge portion receiving hole 47 .
  • Discharge portions 48 are connected with the discharge side of pump P.
  • FIG. 7 is a perspective view showing pump unit P and discharge portions 48 .
  • FIG. 8 is a partially sectional view showing a state where pump unit P and discharge portions 48 are received within housing 31 .
  • FIG. 9 is a sectional view taken along a section line A-A of FIG. 8 .
  • Pump unit P includes a pump housing 36 , a center plate 49 , and a pump cover 35 .
  • Pump housing 36 , center plate 49 , and pump cover 35 have, respectively, substantially cylindrical outer profiles. Pump housing 36 , center plate 49 , and pump cover 35 are arranged in this order in the axial direction.
  • Pump housing 36 includes a bottomed hollow section. Gear pump PP is received in a space between this hollow section of pump housing 36 and center plate 49 .
  • pump cover 35 includes a bottomed hollow section.
  • Gear pump PS is received in a space between this hollow section of pump cover 35 and center plate 49 .
  • Pump housing 36 includes an O-ring groove 55 a and an O-ring groove 55 b formed on an outer circumference of pump housing 36 .
  • Pump cover 35 includes an O-ring groove 55 c formed on an outer circumference of pump cover 35 .
  • O-ring grooves 55 a, 55 b, and 55 c are formed to be apart from each other in the axial direction.
  • O-rings 45 a, 45 b, and 45 c are mounted, respectively, in O-ring grooves 55 a, 55 b, and 55 c.
  • Pump housing 36 includes a circumferential side surface 56 P formed between O-ring 45 a and O-ring 45 b . Moreover, there is formed a low pressure chamber groove 57 P which is formed on an inner circumference of receiving portion 41 at a position to confront circumferential side surface 56 P when pump unit P is received within receiving portion 41 of housing 31 . There is formed a low pressure chamber 40 P defined by circumferential side surface 56 P of pump housing 36 , low pressure chamber groove 57 P of receiving portion 41 , O-ring 45 a, and O-ring 45 b.
  • Center plate 49 includes a low pressure chamber groove 56 S formed on an outer circumference of center plate 49 in a circumferential direction.
  • housing 31 includes a low pressure chamber groove 57 S which is formed on an inner circumference of receiving portion 41 at a position to confront low pressure chamber groove 56 S when pump unit P is received within receiving portion 41 of housing 31 .
  • Gear pumps PP and PS include, respectively, first gear plates 38 P and 38 S, second gear plates 39 P and 39 S, and a pair of driving and driven gears 46 P and 46 S which are externally engaged with each other.
  • suction portions 58 P and 58 S between first gear plates 38 P and 38 S, and second gear plates 39 P and 39 S.
  • An O-ring 37 P is provided on an outer circumference of gear pump PP on the opening portion side of suction portion 58 P of gear pump PP, that is, on an outer circumference of gear pump PP on a side on which gear pump PP and pump housing 36 are abutted on each other.
  • an O-ring 37 S is provided on an outer circumference of gear pump PS on the opening portion side of suction portion 58 S of gear pump PS, that is, on an outer circumference of gear pump PS on a side on which gear pump PS and center plate 49 are abutted on each other.
  • Discharge portions 48 P and 48 S are received, respectively, within discharge portion receiving holes 47 P and 47 S formed to extend from left side surface 31 e of housing 31 to right side surface 31 f of housing 31 to be substantially perpendicular to receiving portion 41 , as described above. That is, these discharge portions 48 P and 48 S are received within discharge portion receiving holes 47 P and 47 S formed in symmetry with respect to a line in a radial direction of low pressure chambers 40 P and 40 S.
  • Discharge passages 43 P and 43 S are formed by discharge passage members 481 P and 481 S each having an axial through hole. One end portions of discharge passage members 481 P and 481 S are inserted, respectively, together with O-rings 483 P and 483 S into insertion holes 64 P and 64 S formed in side surfaces of center plate 49 . In this case, discharge passage members 481 P and 481 S penetrate through low pressure chamber 40 S. Center plate 49 includes connection passages 49 P and 49 S which connect opening portions of one ends of discharge passage members 481 P and 481 S, and high pressure chambers 480 P and 480 S, respectively.
  • FIG. 10 is an enlarged sectional view showing a portion near the discharge portion in the pump apparatus according to the first embodiment of the present invention.
  • an axis X 1 is defined by a direction in which discharge portion 48 extends.
  • Discharge portion 48 P has a structure substantially identical to that of discharge portion 48 S. Accordingly, the only discharge portion 48 S is illustrated below.
  • Discharge portion 48 S includes discharge passage member 481 S inserted into center plate 49 ; a closing member 482 S serving as a cover closing discharge portion receiving hole 47 S; and a wave washer 70 elastically sandwiched between discharge passage member 481 S and closing member 482 S.
  • Tip end portion 481 a of discharge passage member 481 S includes a seal groove 481 b formed on an outer circumference of tip end portion 481 a.
  • An O-ring 483 S is mounted in this seal groove 481 b.
  • O-ring 483 S liquid-tightly separates connection passage 49 S and low pressure chamber 40 S within insertion hole 64 S.
  • Tip end portion 481 a includes a tip end side discharge passage 481 c which is formed at a shaft center of tip end portion 481 a, and which penetrates through tip end portion 481 a.
  • This stepped portion 481 d is engaged with low pressure chamber groove 56 S of center plate 49 so as to position discharge passage member 481 S in a direction of axis X 1 . Accordingly, low pressure chamber groove 56 S serves as an engagement portion which is engaged with stepped portion 481 d.
  • a radial gap provided radially between the outer circumference of body portion 481 h and discharge passage member receiving hole 47 c.
  • This gap is arranged to ensure sufficient liquid-tightness by the elastic deformation of O-ring 484 S, and to absorb the deviation even when a radial position relationship between discharge passage member 481 S and discharge passage member receiving hole 47 c is misaligned (deviated) due to the manufacturing error, assembly error, and so on. That is, in discharge passage member 481 S, tip end portion 481 a is inserted into center plate 49 , and body portion 481 h is inserted into discharge passage member receiving hole 47 c formed in housing 31 .
  • Body portion side discharge passage 481 f is opened on a body portion side end surface 481 g of discharge passage member 481 S.
  • a position of this body portion side end surface 481 g in the direction of axis X 1 is designed to be positioned at a position on the outer side of the housing outer side end portion of discharge passage member receiving hole 47 c.
  • Wave washer 70 is provided on this body portion side end surface 481 g. Closing member 482 S is assembled through wave washer 70 .
  • Closing member 482 S includes a cover portion 482 a received within a cover portion receiving hole 47 a of discharge portion receiving hole 47 S, and a cylindrical portion 482 b received within a cylindrical portion receiving hole 47 b of discharge portion receiving hole 47 S.
  • Cylindrical portion receiving hole 47 b has a diameter larger than that of discharge passage member receiving hole 47 c .
  • a radial portion of cylindrical portion receiving hole 47 b of closing member receiving hole 47 S is connected to the discharge hydraulic passage.
  • cover member receiving hole 47 a has a diameter larger than that of cylindrical portion receiving hole 47 b.
  • Discharge portion receiving hole 47 S is liquid-tightly closed by the staking and so on after closing member 482 S is inserted.
  • Cylindrical portion 482 b includes a damper chamber 482 c which is formed at a shaft center of cylindrical portion 482 b , which has a diameter larger than that of body portion side discharge passage 481 f, and which has an axial length longer than that of body portion side discharge passage 481 f. Moreover, cylindrical portion 482 b includes a radial hydraulic passage 482 d which is formed radially outside this damper chamber 482 c.
  • wave washer 70 is inserted.
  • closing member 482 S is inserted into discharge portion receiving hole 47 S.
  • pump side end surface 482 g of closing member 482 S presses discharge passage member 481 S through wave washer 70 in the direction of the axis X 1 (in the rightward direction of FIG. 10 ).
  • body portion side end surface 481 g of discharge passage member 481 S is exposed within cylindrical portion receiving hole 47 b having the large diameter. Accordingly, it is possible to constantly act the elastic pressing force by wave washer 70 .
  • closing member 482 S is positioned by the staking and so on of cover portion 482 a.
  • discharge passage member 481 S and closing member 482 S are different members.
  • Discharge passage member 481 S absorbs the radial error.
  • wave washer 70 absorbs the error in the direction of the axis X 1 . With this, it is possible to ensure the stable assembling accuracy.
  • the pump apparatus includes a housing 31 , a pump unit P received within a receiving portion 41 which is formed in housing 31 , and which constitutes low pressure chamber 40 S; suction passages 58 S and 58 P opened in an outer circumference of pump unit P, and arranged to supply a hydraulic fluid to pump unit P; a discharge passage member 481 S including a tip end side discharge passage 481 c and a body portion side discharge passage 481 f (discharge passage) formed within discharge passage member 481 S so as to discharge the hydraulic fluid pressurized by pump unit P to the outside of pump housing 31 ; insertion hole 64 S (first discharge passage insertion hole) which is formed in pump unit P, and in which discharge passage member 481 S is inserted through O-ring 483 S (elastic member); discharge passage member receiving hole 47 c (second discharge passage insertion hole) which is formed in housing 31 , and in which discharge passage member 481 S is inserted through O-ring 484 S (elastic member); and a wave washer
  • wave washer 70 is an elastic member which is arranged to apply the elastic force to discharge passage member 481 S.
  • the pump apparatus further includes a predetermined radial gap between discharge passage member 481 S and each of insertion hole 64 S and discharge passage member receiving hole 47 c (each of the insertion holes), and a radial position adjusting mechanism arranged to adjust the position relationship between the insertion holes and the discharge passage member 481 S.
  • the pump apparatus further includes closing member 482 S which is fixed to housing 31 , and which closes discharge passage member receiving hole 47 c (second discharge passage insertion hole); and wave washer 70 (the axial position adjusting mechanism) is provided between discharge passage member 481 S and closing member 482 S.
  • the axial position adjusting mechanism is wave washer 70 (plate spring) disposed in a contracted state between discharge passage member 481 S and closing member 482 S. Accordingly, it is possible to apply the large elastic force even when there is only slight gap relative to the gap necessary for the elastic member such as the coil spring and so on.
  • the pump apparatus further includes a low pressure chamber groove 56 S (engagement portion) which is formed in insertion hole 64 S, and which is arranged to be engaged with discharge passage member 481 S.
  • the axial position adjusting mechanism is an elastic member arranged to urge discharge passage member 481 S toward low pressure chamber groove 56 S. Accordingly, it is possible to engage low pressure chamber groove 56 S and stepped portion 481 d, and to further improve the seal characteristic between connection passage 49 S having the high pressure and low pressure chamber 40 S.
  • FIG. 11 is an enlarged sectional view showing a portion near the discharge portion in the pump apparatus according to the second embodiment of the present invention.
  • wave washer 70 which is the elastic member is provided between discharge passage member 481 S and closing member 482 S.
  • wave washer 70 is provided between discharge passage member 481 S and insertion hole 64 S, unlike the pump apparatus according to the first embodiment.
  • the positioning is performed by the engagement between stepped portion 481 d of discharge passage member 481 S and low pressure chamber groove 56 S.
  • stepped portion 481 d and low pressure chamber groove 56 S are elastically held with a gap, by the change of the position of wave washer 70 .
  • FIG. 12 is an enlarged sectional view showing a portion near the discharge portion in the pump apparatus according to the third embodiment.
  • pump side end surface 482 g of closing member 482 S applies the elastic force to the discharge passage member 481 S through wave washer 70 .
  • a coil spring 71 is provided in place of wave washer 70 .
  • closing member 482 S has an axial length shorter than that of closing member 482 S in the pump apparatus according to the first embodiment.
  • the pump apparatus further includes a damper chamber formed by closing member 482 S, discharge passage member 481 S, and cylindrical portion receiving hole 47 b (second passage member insertion hole). Accordingly, it is possible to effectively suppress the pulsation of the discharge pressure. Moreover, it is possible to ensure the volume necessary for the damping by using coil spring 71 , and thereby to improve the damping characteristic.
  • the axial position adjusting mechanism is coil spring 71 disposed in a contracted state between discharge passage member 481 S and closing member 482 S. Accordingly, it is possible to ensure the larger elastic deformation region with respect to axis X 1 , relative to the wave washer and so on. Consequently, it is possible to effectively absorb the assembly error and so on. Moreover, it is possible to obtain the damping space, and thereby to ensure the damping characteristic.
  • FIG. 13 is an enlarged sectional view showing portions near the discharge portion of the pump apparatus according to the fourth embodiment of the present invention.
  • pump side end surface 482 g of closing member 482 S applies the elastic force to discharge passage member 481 S through wave washer 70 .
  • the pump apparatus according to the fourth embodiment includes a plunger member 72 , in place of wave washer 70 .
  • An inner wall of damper chamber 482 c and plunger 72 are fixed by the press fit.
  • Plunger member 72 is a bottomed cylindrical member.
  • Plunger member 72 includes a cylindrical portion 72 b which is formed into a hollow cylindrical shape; a bottom portion 72 a which closes an opening of body portion side discharge passage 481 f of the discharge passage member 481 S; an axial orifice 72 c formed in bottom portion 72 a, and opened to body portion side discharge passage 481 f; and radial orifices 72 d formed in cylindrical portion 72 b, and opened to the discharge passage within housing 31 .
  • discharge passage member 481 S is inserted within discharge portion receiving hole 47 S.
  • plunger member 72 is slightly mounted in the inner wall of damper chamber 482 c of closing member 482 S. In this temporary assembly state, this is inserted into discharge portion receiving hole 47 S.
  • cover portion 482 a of closing member 482 S is pressed into discharge portion receiving hole 47 S by being applied with the load, the relative position between plunger member 72 and closing member 482 S is varied. The press fit is continued until cover portion 482 a of closing member 4825 is fully received within cover portion receiving hole 47 a . With this, the urging force toward the pump unit side is applied to discharge passage member 481 S.
  • the axial position adjusting mechanism includes plunger member 72 which is arranged to be moved relative to closing member 482 S (or discharge passage member 481 S) in the axial direction.
  • the axial position adjusting mechanism is arranged to adjust the relative position between plunger member 72 and closing member 482 S (or discharge passage member 481 S). With this, it is possible to absorb the assembly error in the axial direction, and to ensure the facility (ease) of the assembling operation without needs for the extreme increase of the manufacturing accuracy of the components.
  • the axial position is adjusted by the relative displacement between closing member 482 S and plunger member 72 .
  • discharge passage member 481 S and plunger member 72 may be relatively moved, and the press fit may be performed by the pressing force of closing member 482 S.
  • the pump apparatuses according to the embodiments of the present invention are illustrated.
  • the present invention is not limited to the above-described embodiments.
  • the other structures may be employed within the gist of the invention.
  • the O-ring is used as the elastic member.
  • the elastic member is not limited to the O-ring. It is optional to elastically absorb the deviation of the radial position by other elastic members.
  • the elastic member and the press fit which serve as the axial position adjusting mechanism absorb the assembly error and so on.
  • a pump apparatus including: a housing; a pump unit received within a receiving portion which is formed in the housing, and which constitutes a low pressure chamber; a suction passage which is opened in an outer circumference of the pump unit, and which is arranged to supply a hydraulic fluid into the pump unit; a discharge passage member including a discharge hydraulic passage which is formed therein, and which is arranged to discharge the hydraulic fluid pressurized by the pump unit to an outside of the housing; a first discharge passage insertion hole which is formed in the pump unit, and into which the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the discharge passage member is inserted through an elastic member; and an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member within the first discharge passage insertion hole and the second discharge passage insertion hole.
  • the axial position adjusting mechanism is an elastic member arranged to apply an elastic force to the discharge passage member.
  • the first discharge passage insertion hole and the discharge passage member are disposed with a gap therebetween; the second discharge passage insertion hole and the discharge passage member are disposed with a gap therebetween; and the pump apparatus further includes a radial position adjusting mechanism arranged to adjust a position relationship between each of the first discharge passage insertion hole and the second discharge passage insertion hole, and the discharge passage member.
  • the pump apparatus further includes a closing member which is fixed to the housing, and which closes the second discharge passage insertion hole; and the axial position adjusting mechanism is disposed between the discharge passage member and the closing member.
  • the pump apparatus further includes a damper chamber formed by the closing member, the discharge passage member, and a wall surface of the second passage member insertion hole.
  • the axial position adjusting mechanism includes a plunger member arranged to be moved in an axial direction relative to one of the discharge passage member and the closing member; and the axial position adjusting mechanism is arranged to adjust a relative position between the plunger member, and the one of the discharge passage member and the closing member.
  • the axial position adjusting mechanism is a plate spring disposed in a contracted state between the discharge passage member and the closing member.
  • the axial position adjusting mechanism is a coil spring disposed in a contracted state between the discharge passage member and the closing member.
  • the pump apparatus further includes an engagement portion which is formed in the first discharge passage insertion hole, and with which the discharge passage member is engaged; and the axial position adjusting mechanism is an elastic member arranged to urge the discharge passage member toward the engagement portion.
  • the pump apparatus including: a housing; a pump unit received within a receiving portion which is formed in the housing, and which constitutes a low pressure chamber; a discharge passage which is arranged to discharge a hydraulic fluid pressurized by the pump unit, through the housing to an outside of the housing; a discharge passage member which constitutes the discharge passage, and which includes a discharge hydraulic passage formed therein; a first discharge passage insertion hole which is formed in the pump unit, and into which an one end portion of the discharge passage member is inserted through an elastic member; a second discharge passage insertion hole which is formed in the housing, and into which the other end portion of the discharge passage member is inserted through an elastic member; an axial position adjusting mechanism arranged to adjust an axial position of the discharge passage member with respect to the first discharge passage insertion hole and the second discharge passage insertion hole; and the first discharge passage insertion hole and the discharge passage member being disposed with a predetermined radial gap therebetween, the second discharge passage insertion hole and the discharge passage member being
  • the axial position adjusting mechanism is an elastic member arranged to apply an elastic force to the discharge passage member.
  • the axial position adjusting mechanism absorbs the manufacturing errors of the components, and the assembly errors, and so on, and thereby to ensure the stable assembling characteristic.
  • the radial position adjusting mechanism is an O-ring mounted on an outer circumference of the discharge passage member; and the radial position adjusting mechanism is arranged to adjust a size of the radial gap by an elastic deformation of the O-ring.
  • the pump apparatus further includes a closing member which is fixed to the housing, and which closes the second discharge passage insertion hole; and the axial position adjusting mechanism is disposed between the discharge passage member and the closing member.
  • the axial position adjusting mechanism is a plate spring disposed in a contracted state between the discharge passage member and the closing member.
  • the pump apparatus further includes a damper chamber formed by the closing member, the discharge passage member, and a wall surface of the second passage member insertion hole.
  • a pump apparatus includes: a housing; a pump unit which is received in a receiving portion formed in the housing, and which includes a low pressure portion and a high pressure portion formed therein; a suction passage formed in the housing, and arranged to supply a hydraulic fluid to the low pressure portion of the pump unit; a low pressure chamber connected with the suction passage and the low pressure portion, and formed between the pump unit and a wall portion forming the receiving portion when the pump unit is received in the receiving portion; a discharge passage arranged to discharge the hydraulic fluid pressurized by the pump unit; a connection pipe which constitutes the discharge passage, and which passes through the low pressure chamber, and which connects the housing and the high pressure chamber, a first connection pipe insertion hole which is formed in the pump unit, and into which the connection pipe is inserted through an elastic member; a second connection pipe insertion hole which is formed in the housing, and into which the connection pipe is inserted through the elastic member; an axial position adjusting mechanism arranged to adjust an axial position of the
  • the axial position adjusting mechanism is an elastic member arranged to apply an elastic force to the connection pipe.
  • the radial position adjusting mechanism is an O-ring which is mounted on an outer circumference of the discharge passage member; and the radial position adjusting mechanism is arranged to adjust a size of the radial gap by an elastic deformation of the O-ring.
  • the pump apparatus further includes a closing member which is fixed to the housing, and which closes the second connection pipe insertion hole; the axial position adjusting mechanism is disposed between the connection pipe and the closing member; and the pump apparatus further includes a damper chamber formed by the closing member, the connection pipe, and a wall surface of the second connection pipe insertion hole.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
US13/937,819 2012-07-10 2013-07-09 Pump apparatus Abandoned US20140099227A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012154866A JP2014015906A (ja) 2012-07-10 2012-07-10 ポンプ装置
JP2012-154866 2012-10-07

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US20140099227A1 true US20140099227A1 (en) 2014-04-10

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ID=49965671

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US13/937,819 Abandoned US20140099227A1 (en) 2012-07-10 2013-07-09 Pump apparatus

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US (1) US20140099227A1 (de)
JP (1) JP2014015906A (de)
CN (1) CN103541891A (de)
DE (1) DE102013213533A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160281712A1 (en) * 2013-03-20 2016-09-29 Magna Powertrain Inc. Tandem electric pump

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9976544B2 (en) * 2014-07-31 2018-05-22 Fmc Technologies, Inc. Pump fluid end assembly mounting system
US10082137B2 (en) * 2016-01-14 2018-09-25 Caterpillar Inc. Over pressure relief system for fluid ends

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US2491100A (en) * 1942-11-18 1949-12-13 Bendix Aviat Corp Pump
US2558837A (en) * 1944-04-13 1951-07-03 Bendix Aviat Corp Pump
US4486158A (en) * 1981-01-29 1984-12-04 Matsushita Electric Industrial Co., Ltd. Rotary vane compressor with suction port adjustment
US5232273A (en) * 1991-03-13 1993-08-03 Robert Bosch Gmbh Brake system pump with a damper chamber with leaf spring and cup closure
US20050207916A1 (en) * 2004-03-18 2005-09-22 Dieter Ammon Sliding vane pump
US6948921B1 (en) * 1999-11-26 2005-09-27 Leybold Vakuum Gmbh Vacuum pump comprising an outlet
US20110062773A1 (en) * 2009-09-17 2011-03-17 Hitachi Automotive Systems, Ltd. Pump assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012154866A (ja) 2011-01-28 2012-08-16 National Institute Of Advanced Industrial & Technology プローブ顕微鏡

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491100A (en) * 1942-11-18 1949-12-13 Bendix Aviat Corp Pump
US2558837A (en) * 1944-04-13 1951-07-03 Bendix Aviat Corp Pump
US4486158A (en) * 1981-01-29 1984-12-04 Matsushita Electric Industrial Co., Ltd. Rotary vane compressor with suction port adjustment
US5232273A (en) * 1991-03-13 1993-08-03 Robert Bosch Gmbh Brake system pump with a damper chamber with leaf spring and cup closure
US6948921B1 (en) * 1999-11-26 2005-09-27 Leybold Vakuum Gmbh Vacuum pump comprising an outlet
US20050207916A1 (en) * 2004-03-18 2005-09-22 Dieter Ammon Sliding vane pump
US20110062773A1 (en) * 2009-09-17 2011-03-17 Hitachi Automotive Systems, Ltd. Pump assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160281712A1 (en) * 2013-03-20 2016-09-29 Magna Powertrain Inc. Tandem electric pump

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DE102013213533A8 (de) 2014-04-03
CN103541891A (zh) 2014-01-29
DE102013213533A1 (de) 2014-02-13
JP2014015906A (ja) 2014-01-30

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