CN104912790A - Variable displacement vane pump - Google Patents
Variable displacement vane pump Download PDFInfo
- Publication number
- CN104912790A CN104912790A CN201510103388.2A CN201510103388A CN104912790A CN 104912790 A CN104912790 A CN 104912790A CN 201510103388 A CN201510103388 A CN 201510103388A CN 104912790 A CN104912790 A CN 104912790A
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- CN
- China
- Prior art keywords
- pump
- variable displacement
- pressure chamber
- low pressure
- live axle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- 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
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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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
- F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
- F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—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
- F04C2/3441—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 the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
Abstract
A variable displacement vane pump includes a pump housing, a drive shaft supported in the pump housing, a rotor rotated by the drive shaft, a plurality of vanes mounted to the rotor, a cam ring disposed movably around the pump element and a pressure plate arranged facing the rotor and the cam ring. The pressure plate has formed therein a discharge hole and a drive shaft insertion hole. The pump housing has formed therein a suction hole, a high-pressure chamber and a low-pressure chamber. The variable displacement vane pump further includes a first seal member disposed on a pressure receiving surface of the pressure plate so as to separate the drive shaft insertion hole from the high-pressure chamber and a second seal member disposed on the pressure receiving surface of the pressure plate so as to separate the low-pressure chamber from the high-pressure chamber and the drive shaft insertion hole.
Description
Technical field
The present invention relates to the variable displacement vane pump in the hydraulic pressure supply source of the automatic transmission being applicable to such as automobile.
Background technique
As the variable displacement vane pump in the past of automatic transmission being applicable to automobile, the invention that known case is recorded as following patent documentation 1.
This variable displacement vane pump has: inside has the pump case of the cylindrical shape of pump key element accommodation section; Be inserted through the live axle be bearing on this pump case; By the rotor of this live axle rotary actuation; The multiple blades on the peripheral part of this rotor can be arranged on passing in and out; Cam ring, eccentric can be housed in the outer circumferential side of rotor movably, circumferentially separate multiple pump chamber together with rotor and multiple blade relative to the axle center of live axle.Based on the offset of cam ring, change the volume of each pump chamber, make discharge flow rate variable thus.
[prior art document]
[patent documentation]
[patent documentation 1] Japanese Unexamined Patent Publication 2012-163040 publication
Here, described variable displacement vane pump is in the past in the structure of inside being mounted in automatic transmission in the mode that impregnated in working solution, high-voltage section side is separated in liquid-tight manner, but about low voltage section side, the axial clearance ground separated between pump case and rotor can be formed communicatively with the bearing portion of pump case, allows working solution to the leakage outside pump.
But, according to described structure, when suction effect, according to the negative pressure produced the volume enlargement of pump chamber with rotor rotation, in described bearing portion, working solution for bearing lubrication is picked up, and can cause the unfavorable condition of the skimming wear of this live axle produced by the bearing lubrication deficiency of live axle etc.
Summary of the invention
The present invention is conceived to such technical task and researches and develops, and provides the variable displacement vane pump of the lack of lubrication that can suppress live axle.
Feature of the present invention is, between an end wall and the compression zone of platen of pump key element accommodation section, is provided with the drive shaft side sealed member of separating hyperbaric chamber and bearing portion and separates the low pressure chamber side sealing parts of hyperbaric chamber, bearing portion and low pressure chamber.
Particularly, the variable displacement vane pump of first aspect present invention, is characterized in that, has:
Pump case, has pump key element accommodation section;
Live axle, is bearing on described pump case by axle;
Rotor, is arranged in described pump case, is driven in rotation by described live axle, and circumferentially have multiple groove;
Multiple blade, can be arranged in described groove with freeing in and out;
Cam ring, can be arranged on movably in described pump key element accommodation section, be formed as ring-type, form multiple pump chamber in inner circumferential side together with described rotor and described blade;
Suction port, is formed on described pump case, to the inhalation area opening that the volume in described multiple pump chamber increases with the rotation of described rotor;
Suction passage, is arranged on described pump case, and the food tray of storage working solution is communicated with described suction port;
Platen, using the running shaft of described live axle as time axial, in described pump key element accommodation section, axially described, is relatively arranged with described rotor and described cam ring;
Exhaust port, is arranged on described platen, in the discharging area that the volume in described multiple pump chamber reduces with the rotation of described rotor, runs through described platen ground opening along described axis;
Hyperbaric chamber, using during around the direction of described running shaft as circumference, be formed on described pump case, with relatively arranging with the opposition side of described rotor and the relative side of described cam ring and compression face side in the described axial both ends of the surface of described platen, be imported into via described exhaust port and discharge pressure, thus, described platen is exerted a force to described rotor and this side of described cam ring; And low pressure chamber, in the circumferential direction, be formed in the position corresponding with described inhalation area, and be imported into suction pressure;
Live axle through hole, is arranged on described platen, runs through for described live axle;
Drive shaft side Sealing, is arranged on this side of described compression face of described platen, is formed as ring-type in the mode of surrounding described live axle through hole, and separates in described live axle through hole and described hyperbaric chamber; And low pressure chamber side seal, be formed as ring-type in the mode of surrounding described inhalation area, separate described inhalation area, described hyperbaric chamber and described live axle through hole.
According to this variable displacement vane pump, in the mode that live axle through hole is communicated with low pressure chamber, when the negative pressure grow of low pressure chamber side, live axle through hole becomes negative pressure similarly, outer gas can be attracted via the axial gap of driving, but in the invention that first aspect present invention is recorded, separated with low pressure chamber in live axle through hole, thus drawn suppressed from the outer aspiration in the axial gap of driving produced by the negative pressureization in low pressure chamber.
The variable displacement vane pump of second aspect present invention, is characterized in that, via the gap between described pump case and described live axle, can be communicated with described pump key element accommodation section and described pump case outside.
According to this variable displacement vane pump, the gap between pump case and live axle is arranged to sealed member to prevent from pump key element accommodation section to the structure of the leakage of the working solution of pump case outside, sealed member is not set, the reduction of parts count can be realized.In addition, in such structure, easily attract gas from the axial gap of driving, but by separating in live axle through hole and low pressure chamber, such attraction can be suppressed.
The variable displacement vane pump of third aspect present invention, is characterized in that, has drain passageway, and it is arranged on described pump case, the working solution leaked is discharged to the outside around described live axle.
According to this variable displacement vane pump, the working solution of leakage is made to return in the mode of inhalation area side being connected with inhalation area by drain passageway, when inhalation area side negative pressure, drive axial clearance space also can negative pressure, but due to by drain passageway and ft connection, so the negative pressure driving axial space can be suppressed.
The variable displacement vane pump of fourth aspect present invention, is characterized in that, described drain passageway to be configured in than inner end with the outboard end of described drain passageway and more to be formed by the mode on the downside of vertical direction.
According to this variable displacement vane pump, the possibility that outboard end enters under the operating fluid level of food tray uprises, and outer aspiration can be suppressed to draw.In addition, the discharge of the dirt in working solution via drain passageway can be improved.
The variable displacement vane pump of fifth aspect present invention, is characterized in that,
Described pump case is formed by with lower component: the 1st housing department of cup-shaped, is formed by cylindrical portion with the mode of the axial side closing described cylindrical portion and the integrated bottom of described cylindrical portion; 2nd housing department, is formed in combination with the mode and described 1st housing department of closing the axial opposite side of described cylindrical portion,
The outboard end side opening portion of described suction passage is formed in the described cylindrical portion of described 1st shell.
According to this variable displacement vane pump, by making the outboard end side opening portion of suction passage be formed in the wide cylindrical portion of axial width, compared with being formed in the situation of the 2nd this side of housing department, can the opening area in enlarged openings portion, can suction efficiency be improved.
The variable displacement vane pump of sixth aspect present invention, is characterized in that, described suction passage is formed communicatively from described inhalation area and described axial both sides respectively,
Described pump case has lubrication groove, and it is axially arranged on the position relative with described rotor relative to described rotor with the opposition side of described platen described, and has been imported into discharge pressure.
According to this variable displacement vane pump, by being imported into the lubrication groove of discharging pressure, the impact of the negative pressure of inhalation area side can being suppressed to feed through to and to drive axial clearance space.
The variable displacement vane pump of seventh aspect present invention, is characterized in that, described drive shaft side Sealing and described low pressure chamber side seal split ground are formed.
According to this variable displacement vane pump, compared with the mode of a part for connection two Sealing, the simplification of each seal configurations can be realized.
The variable displacement vane pump of eighth aspect present invention, is characterized in that, described pump case has the high pressure lead-in groove of will discharge between the pressure described drive shaft side Sealing of importing and described low pressure chamber side seal portion.
According to this variable displacement vane pump, the deficiency of the pushing force of the pushing platen in the area of low pressure surrounded by drive shaft side Sealing and low pressure chamber side seal can be supplemented by the discharge pressure being imported into high pressure lead-in groove, the distortion of platen can be suppressed.
The variable displacement vane pump of ninth aspect present invention, is characterized in that, described pump case has: the drive shaft side seal groove connected for described drive shaft side Sealing; Low pressure chamber side sealing groove, connects for described low pressure chamber side seal, and with the liftoff setting of described drive shaft side Sealing part.
According to this variable displacement vane pump, two Sealings have seal groove respectively, thus can improve the retentivity of two Sealings.
The variable displacement vane pump of tenth aspect present invention, is characterized in that, described pump case has: the drive shaft side seal groove connected for described drive shaft side Sealing; For the low pressure chamber side sealing groove that described low pressure chamber side seal connects,
Described drive shaft side seal groove and described low pressure chamber side sealing groove are formed continuously in the region that described drive shaft side Sealing is adjacent with described low pressure chamber side seal.
According to this variable displacement vane pump, compared with situation about being formed between the region that drive shaft side Sealing is adjacent with low pressure chamber side seal for separating of the wall of each groove, the space of the amount of this wall can be omitted, its result, the opening area of suction port can be expanded.
The variable displacement vane pump of the present invention the 11 aspect, is characterized in that, described drive shaft side Sealing and described low pressure chamber side seal interconnectedly one-body molded.
According to this variable displacement vane pump, the reduction of parts count can be realized.
The variable displacement vane pump of the present invention the 12 aspect, it is characterized in that, described drive shaft side Sealing is formed in the mode that the area being formed in the area of low pressure between itself and described live axle through hole is larger than this side of described inhalation area in this side of described discharging area in the circumferential direction.
According to this variable displacement vane pump, in this side of discharging area, platen pushing force can be suppressed to become excessive, and the distortion of platen can be suppressed.
The variable displacement vane pump of the present invention the 13 aspect, is characterized in that, the sliding bearing that the mode with the outer circumferential side surrounding described live axle is arranged,
Described sliding bearing has spiral chute, and it is formed in inner circumferential side, and with the working solution between described sliding bearing and described live axle because of with being formed to the mode of the direction movement be separated from this side, described pump key element accommodation section relative to rotation of described live axle.
According to this variable displacement vane pump, by being discharged to pump case outside energetically by working solution, the suction of outer gas can be suppressed.
The effect of invention
According to the present invention, by separating low pressure chamber and bearing portion, the working solution in bearing portion can not be picked up by the negative pressure produced with suction effect, and contribute to the suppression of the lack of lubrication of live axle.
Accompanying drawing explanation
Fig. 1 is the plan view of variable displacement vane pump of the present invention.
Fig. 2 is the sectional view of the A-A line along Fig. 1 representing the 1st mode of execution of the present invention.
Fig. 3 is the sectional view of the B-B line along Fig. 2.
Fig. 4 is the sectional view of the C-C line along Fig. 1.
Fig. 5 is the figure from the pump housing shown in this unilateral observation of the mating face between pump cover Fig. 2.
Fig. 6 (a) is with in (b), and (a) is the figure the 1st bearing pack be contained on the pump housing, and (b) is the figure the 2nd bearing pack be contained on pump cover.
Fig. 7 is the figure suitable with Fig. 5 of the variation representing the 1st mode of execution of the present invention.
Fig. 8 is the figure suitable with Fig. 5 representing the 2nd mode of execution of the present invention.
The explanation of reference character
10 ... pump key element accommodation section
10b ... end wall
11 ... pump case
12 ... live axle
14 ... cam ring
15 ... the pump housing
21 ... rotor
22 ... blade
23 ... platen
25a ... 1st inhalation port (sucting)
25b ... 2nd inhalation port (sucting)
27a ... 1st low pressure chamber (low pressure chamber)
27b ... 2nd low pressure chamber (low pressure chamber)
30 ... pump chamber
31a ... 1st discharge port (discharge portion)
31b ... 2nd discharge port (discharge portion)
33 ... hyperbaric chamber
34 ... live axle inserting hole
35a ... 1st axis hole (bearing portion)
35b ... 2nd axis hole (bearing portion)
S1 ... 1st sealed member (drive shaft side sealed member)
S2 ... 2nd sealed member (low pressure chamber side sealing parts)
Embodiment
Below, each mode of execution of variable displacement vane pump of the present invention is described in detail based on accompanying drawing.In this external following mode of execution, show same for this variable displacement vane pump the automatic transmission (CVT) being applicable to vehicle.
(the 1st mode of execution)
Fig. 1 ~ Fig. 6 represents the 1st mode of execution of capacity-variable type oil pump of the present invention, and this variable displacement vane pump (hereinafter referred to as " pump ") has as shown in FIG. 1 to 3: roughly cylindric pump case 11, and inside has pump key element accommodation section 10; Live axle 12, the axis along this pump case 11 is inserted through supporting, is driven in rotation based on the driving force from the motor transmission outside diagram; Circular adapter ring 13, is embedded in the perisporium of described pump key element accommodation section 10; Circular cam ring 14, can be housed in the inner circumferential side of this adapter ring 13 prejudicially relative to axle center (rotating center of the rotor 21 described later) Q of live axle 12; Pump key element, being configured in the inner circumferential side of this cam ring 14, and having live axle 12, implementing pumping action described later by being driven in rotation to the counter clockwise direction in Fig. 3 by collecting; Control valve 50, controls to be rotated a circle by this pump key element and the discharge flow rate (so-called intrinsic discharge capacity) of the working solution be discharged.
Described pump case 11 is divided into and is formed with lower component: roughly the 1st shell of bottomed cylindrical and the pump housing 15, by cylindrical portion 10a and close this cylindrical portion 10a axial end side as bottom end wall 10b form; 2nd shell and pump cover 16, close the other end side opening of described cylindrical portion 10a.15,16 by being communicated with multiple engagement portion 15a, 16a of being formed with the peripheral part of the described pump housing 11 and pump cover 16, to pass through bolt 20 fastened for both.
Described adapter ring 13 is formed thereon at otch in the arc-shaped groove on the inner peripheral surface of end, maintains the pin parts 17 of the swing of supporting block ring 14.In addition, on the inner peripheral surface of this adapter ring 13, the position radially roughly relative with described pin parts 17 is provided with sealed member 18, by sealing parts 18 and pin parts 17, between the radial direction of adapter ring 13 and cam ring 14, separate the 1st fluid pressure chamber P1 and the 2nd fluid pressure chamber P2 of the weave control being used for this cam ring 14.
Described cam ring 14 is formed by the agglomerated material of ferrous metal, the engagement groove of the cross circular section arcuation that otch is formed on its peripheral part engages with pin parts 17, thus, freely joltily can be bearing in described 1st this side of fluid pressure chamber P1 or the 2nd this side of fluid pressure chamber P2, based on the active force of disc spring 19 being configured in the 2nd this side of fluid pressure chamber P2 to cam ring 6 to the 1st this side of fluid pressure chamber P1, namely the offset (hereinafter referred to as " offset ") to the rotating center Q relative to rotor 21 described later becomes maximum direction, exerts a force all the time.
Described pump key element is formed by with lower component: rotor 21, integrally rotatably can be incorporated into the periphery of live axle 12 by spline, and rotatably can be housed in the inner circumferential side of cam ring 14; The blade 22 of multiple rectangular plate-like, can be remained on by collecting the groove 21a be formed in radial otch on the peripheral part of this rotor 21 with freeing in and out respectively.Described pump key element utilizes the inner end of pump key element accommodation section 10, is retained clamp position by the roughly discoid platen 23 of configuration adjacent with end wall 10b and pump cover 16.
And, at the inner end of each groove 21a of described rotor 21, be provided with the back pressure groove of cross section circular shape vertically, the centrifugal force produced by pressure in the back pressure chamber 24 that is made up of the base end part of this back pressure groove and blade 22 and the rotation with rotor 21, makes blade 22 fly out.And, according to described structure, with the rotation of rotor 21, each blade 22 flies out from each groove 21a, the front end of this each blade 22 all the time with the inner peripheral surface sliding contact of cam ring 14, thus, between cam ring 14 and rotor 21, being separated into multiple pump chamber 30 by adjacent 1 pair of blade 22,22 and platen 23 and pump cover 16, by making cam ring 14 swing, increasing and decreasing the volume of this each pump chamber 30.
In addition, on the inner side surface of the opposing side between described rotor 21 and a side of platen 23 and pump cover 16, as shown in Figure 2, Figure 4 shows, respectively in the region (hereinafter referred to as " inhalation area ") that the internal capacity of described each pump chamber 30 expands gradually with the rotation of rotor 21, be circumferentially provided with 1 couple the 1st inhalation port 25a and the 2nd inhalation port 25b that otch is formed as circular arc channel-shaped.Described 1st inhalation port 25a is by running through the inlet hole 26 being formed at its circumferential assigned position, and the 1st low pressure chamber 27a be formed on the inner side surface of end wall 10b via opening is connected with the suction port 28 be located on cylindrical portion 10a, in addition, described 2nd inhalation port 25b is via the 2nd low pressure chamber 27b be formed in by opening on the inner side surface of pump cover 16, and the continuous print path that the access 29 being communicated with the 2nd low pressure chamber 27b and described suction port 28 is formed is connected to described suction port 28, thus, the working solution sucked from the food tray diagram is imported into respectively via described suction port 28.In addition, in the present embodiment, suction passage of the present invention is constituted by described inlet hole 26 and the 1st low pressure chamber 27a or described 2nd low pressure chamber 27b and access 29.
Here, in the described pump of present embodiment, owing to described suction port 28 to be formed in the cylindrical portion 10a of the pump housing 15, thus with this suction port 28 is arranged at compared with the situation of pump cover 16, the opening area of this suction port 28 can be guaranteed significantly, the raising of the suction efficiency of pump can be realized.
And, on a side of described platen 23 and the inner side surface of pump cover 16, especially as shown in Fig. 2, Fig. 5, relative to the 1st, the 2nd inhalation port 25a, 25b become roughly axisymmetric position, in the region (hereinafter referred to as " discharging area ") that the internal capacity of described each pump chamber 30 reduces gradually with the rotation of rotor 21, be circumferentially provided with the 1st discharge port 31a and the 2nd discharge port 31b of the roughly circular arc channel-shaped that otch is formed in the same manner as described 1st, the 2nd inhalation port 25a, 25b.And, about described 1st discharge port 31a, by running through the tap hole 32 being formed at its circumferential assigned position, the hyperbaric chamber 33 of the roughly circular arc channel-shaped be formed on the inner side surface of end wall 10b with opening is communicated with, and is discharged to pump outer (automatic transmission outside diagram) from this hyperbaric chamber 33 by the drain passageway be arranged on the diagram of the inside of the pump housing 15.
In addition, at the central part of described platen 23, as shown in Fig. 2, Fig. 6, be formed through the live axle inserting hole 34 interted for live axle 12, and the central part of the pump key element accommodation section 10 in the described pump housing 15 and pump cover 16, is formed through the 1st axis hole 35a for the supporting of live axle 12 and the 2nd axis hole 35b.And, described 1st, the 2nd axis hole 35a, 35b is configured to the internal diameter slightly larger than live axle 12, with this live axle 12 be interval with sliding bearing i.e. the 1st bearing B1 and the 2nd bearing B2, and implement this lubrication between the two by the working solution be located between this each bearing B1, B2 and live axle 12.Here, on the inner peripheral surface of described each bearing B1, B2, working solution is discharged to the spiral groove 36 outside pump by the otch sliding contact be formed between adjoint and live axle 12 respectively.
And, in the outer end of described 1st axis hole 35a, run through the drain passageway 37 being formed with and being communicated with outside the 1st axis hole 35a and pump, by this drain passageway 37, the working solution sent by described spiral groove 36 is discharged to outside pump.In addition, this drain passageway 37 is to arrange from the outer end of the 1st axis hole 35a towards the mode of vertical lower side diagonal, and this opening portion can impregnated in the working solution in the food tray be stored in outside described diagram and form.
In addition, at a side of described platen 23 and the inner side surface of pump cover 16, as shown in Figure 2, respectively in the predetermined range of the circumference in the face of described each back pressure chamber 24 of discharging area, otch is formed with the 1st back pressure port 38a and the 2nd back pressure port 38b of circular arc channel-shaped.And, in described 1st back pressure port 38a, import discharge pressure by the introduction hole outside diagram from hyperbaric chamber 33, and in described 2nd back pressure port 38b, imported by back pressure chamber 24 and discharge pressure.
And on the inner side surface of described pump cover 16, in the predetermined range of the circumference towards back pressure chamber 24 of inhalation area, otch is formed through to import discharges the lubrication groove 39 that pressure carries out the circular arc channel-shaped of the friction, lubrication between rotor 21.In addition, in this lubrication groove 39, in the same manner as described 2nd back pressure port 38b, imported by back pressure chamber 24 and discharge pressure.
In addition, on the inner side surface of described end wall 10b, as shown in Fig. 2, Fig. 5, in the outer region of the 1st axis hole 35a, otch is formed with circular the 1st seal groove 41 as drive shaft side seal groove, and in the outer region of the 1st low pressure chamber 27a, otch is formed with the 2nd seal groove 42 as low pressure chamber side sealing groove of oval ring-type, and this two seal groove 41,42 is separated mutually across spacing wall 43 ground.And, in described 1st, the 2nd seal groove 41,42, chimeric respectively have in corresponding the 1st sealed member S1 as drive shaft side sealed member of shape and the 2nd sealed member S2 as low pressure chamber side sealing parts, thus, be divided into the 1st axis hole 35a of low pressure, the 1st low pressure chamber 27a and hyperbaric chamber 33, and separate the 1st axis hole 35a and the 1st low pressure chamber 27a that are directly communicated with pump outward.
Described control valve 50 is formed primarily of with lower component as illustrated in fig. 3: guiding valve valve body 52, can slidably be housed in be formed at the pump housing 15 inside valve opening 51 in; Valve spring 54, between the plug 53 being installed in the end side (right side in Fig. 3) of closed described valve opening 51 and guiding valve valve body 52, exerts a force to the left direction in Fig. 3 to guiding valve valve body 52; Solenoid valve 55, closes another side of described valve opening 51, and configures in the push rod outside diagram links (Japanese: Even Department) mode with guiding valve valve body 52.
And, in this control valve 50, namely the hydraulic pressure of the upstream side of the metering orifice plate outside diagram is discharged the 1st control room R1 of solenoid valve 55 side of pressing the 1st annular groove spine 52a being directed through described guiding valve valve body 52 to be divided, and the 2nd control room R2 of this side of plug 53 that the 2nd annular groove spine 52b hydraulic pressure in the downstream side of the metering orifice plate outside described diagram being directed through described guiding valve valve body 52 is divided, in such a configuration, by the axial position of the front and back differential pressure of this metering orifice plate and the active force spool control valve valve body 52 of valve spring 54, offset thus for cam ring 14 controls.In addition, be communicated with outward with pump via the intercommunicating pore outside diagram by the low pressure chamber R0 separated between described two annular groove spine 52a, 52b, and be maintained at the low pressure equal with suction pressure.
Specifically, the pressure difference of the 1st control room R1 and the 2nd control room R2 is less, when guiding valve valve body 52 is positioned at this side of solenoid valve 55, the 1st fluid pressure chamber P1 and low pressure chamber R0 is communicated with via the 1st access 56a, and be communicated with the 2nd control room R2 and the 2nd fluid pressure chamber P2 via the 2nd access 56b, its result, cam ring 14 is controlled to maximum eccentric position based on the hydraulic pressure of the 2nd fluid pressure chamber P2 and the active force of disc spring 19, and pump discharge flow rate becomes maximum.On the other hand, the pressure difference of the 1st control room R1 and the 2nd control room R2 increases, when the active force that guiding valve valve body 52 resists valve spring 54 moves to this side of plug 53, the 1st control room R1 and the 1st fluid pressure chamber P1 is communicated with via the 1st access 56a, and be communicated with low pressure chamber R0 and the 2nd fluid pressure chamber P2 via the 2nd access 56b, its result, cam ring 14 based on the 1st fluid pressure chamber P1 pressure opposing disc spring 19 active force to the side that offset reduces by weave control, pump discharge flow rate minimizing.
Below, about the distinctive action effect of the variable displacement pump of present embodiment, be described based on Fig. 2.
As mentioned above, the oil pump of automatic transmission (CVT) is arranged in the mode being housed in this automatic transmission inside, thus becomes by every the state being located at the 1st, the 2nd radial clearance C1, C2 between the 1st, the 2nd bearing B1, B2 of pump case 11 and live axle 12 and allowing the connection inside and outside pump.Therefore, in the past, by such connected state, by the negative pressure produced based on the suction effect of pump, the working solution of the 1st radial clearance C1 is sucked into suction side (the 1st this side of inhalation port 25a) by the axial clearance C3 between the inner side surface of end wall 10b and the another side of platen 23, causes the problem of the sufficient lubrication can not guaranteeing the 1st bearing B1 and live axle 12.
Therefore, in the pump of present embodiment, all territories of the 1st axis hole 35a and all territories of the 1st low pressure chamber 27a is mutually separated by described 1st sealed member S1 and described 2nd sealed member S2, thus, be cut off by the 1st, the 2nd sealed member S1, S2 (especially the 2nd sealed member S2) according to the negative pressure that described suction effect produces, its result, can avoid the working solution in the 1st radial clearance C1 to be sucked into the such unfavorable condition in suction side, eliminate described lack of lubrication.
And, in the present embodiment, form described 1st, the 2nd sealed member S1, S2 as independently sealed member, thus, the shape of each sealed member S1, S2 can be simplified, can will discharge the groove portion 40 (with reference to Fig. 5) pressing and import and be formed between this two sealed member S1, S2, can be not enough by the extruding force of the platen 23 in the supplementary area of low pressure of this discharge pressure, thus also contribute to the distortion suppressing platen 23.
And described each sealed member S1, S2 are embedded in independently seal groove 41,42 respectively, thus also have the advantage of the raising of the retentivity that can realize this each sealed member S1, S2.
In addition, owing to adopting the structure be directly communicated with by described drain passageway 37 outside the 1st axis hole 35a and pump, thus with make the working solution leaked from described each pump chamber 30 compared with the situation refluxed in suction side, contribute to the suppression of the negative pressure around described live axle 12.And, this drain passageway 37 is formed from the 1st axis hole 35a towards vertical lower side, thus easily make the outer end of this drain passageway 37 impregnated in the working solution of the food tray outside described diagram, the attraction that have passed the outer gas of this drain passageway 37 is suppressed, realize the raising of pump efficiency, also contribute to the raising of the pollutant discharge property in working solution.
And, on the inner peripheral surface of described 1st, the 2nd bearing B1, B2, be formed respectively with and live axle 12 between sliding contact and the spiral groove 36 that working solution can be discharged outside pump, thus whenever the driving of pump, working solution in described 1st, the 2nd radial clearance C1, C2 can be discharged energetically outward respectively to pump via this spiral groove 36, thus, based on the negative pressure produced with described pump suction effect, more effectively can suppress to have passed the sucking-off of working solution of the 1st, the 2nd radial clearance C1, C2.
In addition, when present embodiment, in the circumferential scope corresponding with inhalation area on the inner side surface of described pump cover 16, the position more relative than the back pressure chamber 24 of the 2nd low pressure chamber 27b more inner circumferential side side is being provided with described lubrication groove 39, thus, in this side of pump cover 16, also can be broken by the discharge crush-cutting being imported into this lubrication groove 39 from the negative pressure of the 2nd this side of low pressure chamber 27b, also have and this negative pressure can be avoided to act on the such advantage of the unfavorable condition of the working solution in the 2nd radial clearance C2 by axial clearance C3.
(variation)
Fig. 7 represents the variation of described 1st mode of execution, about the peritreme of described 1st axis hole 35a, become large mode so that the area of the circumferential scope suitable with discharging area is relative described 1st seal groove 41 is set, thus, in the peritreme of the 1st axis hole 35a suitable with discharging area, be formed with the expansion section, area of low pressure 44 that can import low pressure in wider scope.
Like this, the area of low pressure in discharging area is expanded by expansion section, described area of low pressure 44, thus, in this discharging area, the reduction every the extruding force being located at the platen 23 produced by discharge pressure in described axial clearance c3 can be realized, its result, can suppress this extruding force to become excessive such unfavorable condition, contribute to the suppression of the distortion of platen 23.
(the 2nd mode of execution)
Fig. 8 represents the 2nd mode of execution of variable displacement vane pump of the present invention, delete described spacing wall 43 with described 1st mode of execution difference, described 1st seal groove 41 and described 2nd seal groove 42 are formed as continuous print seal groove 45, described 1st sealed member S1 and described 2nd sealed member S2 is formed as the sealed member S0 of one.
Like this, in the present embodiment, form owing to becoming described continuous print seal groove 45 ground, so compared with the 1st mode of execution being provided with described spacing wall 43, this space shared by spacing wall 43 can be omitted, its result, can expand the opening area of the 1st inhalation port 25a, contribute to the raising of pump suction efficiency.
And, due to by adopting the 1st, the 2nd sealed member S1, S2 that independently parts are formed to adopt the sealed member S0 of described one to form in described 1st mode of execution, so the parts count of pump can be cut down, realize the raising of capacity of pump.
The invention is not restricted to the structure of described each mode of execution, the position of such as described each inhalation port 25a, 25b or described each discharge port 31a, 31b, for the process of their path, the controlling method etc. of cam ring 14, the structure at the details position of direct relation is not had with structure of the present invention, even if the concrete structure of described each seal groove 41,42 etc. etc. and structure of the present invention have the part of direct relation, its position and shape etc. freely can change according to the specification etc. of applicable object and motor without departing from the spirit and scope of the invention.
Below, be described about the technological thought beyond the present invention's record of holding from described each mode of execution.
A () variable displacement vane pump as described in technological scheme 2, is characterized in that,
On described pump case, be provided with the drain passageway of externally being discharged by the working solution of the surrounding leaking into described live axle.
By adopting described structure, with make to leak into drive axial working solution to reflux to suction side situation compared with, contribute to the negative pressure suppressing to drive axial space.
(b) as described in variable displacement vane pump as described in (a), it is characterized in that,
Described drain passageway is configured to outboard end than inner end more by vertical downside.
By adopting described structure, the possibility entered under the operating fluid level of food tray due to outboard end uprises, beyond the attraction of gas suppressed, the raising of pump efficiency can be realized.In addition, by making the outer end of drain passageway become down vertical, the raising of the discharge of the pollutant in working solution is also contributed to.
C () variable displacement vane pump as described in technological scheme 1, is characterized in that,
Described suction passage is communicated with from axial both sides relative to described inhalation area,
In the position relative with described rotor of an end wall of described pump key element accommodation section, be provided with to import and discharge the lubrication groove that pressure carries out the slip lubrication of described rotor.
By adopting described structure, by being imported into the discharge pressure of lubrication groove, the impact of the negative pressure of this side of inhalation area can be avoided to relate to the unfavorable condition driving axial space such.
D () variable displacement vane pump as described in technological scheme 1, is characterized in that,
Described drive shaft side sealed member and described low pressure chamber side sealing parts are formed on split ground respectively.
By adopting described structure, being connected with a part for two sealed members and compared with situation about forming integratedly, there is the advantage of the shape that can simplify each sealed member.
(e) as described in variable displacement vane pump as described in (d), it is characterized in that,
On an end wall of described pump key element accommodation section, be provided with the high pressure lead-in groove of will discharge between the pressure described drive shaft side sealed member of importing and described low pressure chamber side sealing parts.
By adopting described structure, the extruding force that the discharge pressure that can be imported into by high pressure lead-in groove supplements the platen in the area of low pressure of driven shaft side sealing parts and low pressure chamber side sealing parts enclose is not enough, can suppress the distortion of platen.
(f) as described in variable displacement vane pump as described in (d), it is characterized in that,
On an end wall of described pump key element accommodation section, be formed for the chimeric drive shaft side seal groove of described drive shaft side sealed member, and be formed for the chimeric low pressure chamber side sealing groove of described low pressure chamber side sealing parts in the mode be separated with this drive shaft side seal groove.
By adopting described structure, each sealed member is kept by seal groove respectively, thus contributes to the raising of the retentivity of this each sealed member.
(g) as described in variable displacement vane pump as described in (d), it is characterized in that,
On an end wall of described pump key element accommodation section, be formed for the chimeric drive shaft side seal groove of described drive shaft side sealed member, and be formed for the chimeric low pressure chamber side sealing groove of described low pressure chamber side sealing parts,
Described drive shaft side seal groove and described low pressure chamber side sealing groove are arranged continuously in the region that described drive shaft side sealed member is adjacent with described low pressure chamber side sealing parts.
By adopting described structure, compared with the situation of the spacing wall making two seal grooves be separated is set in the region that two sealed members are adjacent, the space shared by this spacing wall can be omitted, thus, there is the advantage of the opening area that can expand suction port.
H () variable displacement vane pump as described in technological scheme 1, is characterized in that,
Described drive shaft side sealed member and described low pressure chamber side sealing parts are integrally formed interconnectedly.
By adopting described structure, the parts count of pump can be cut down, and the raising of productivity can be realized.
I () variable displacement vane pump as described in technological scheme 1, is characterized in that,
Described driving side sealed member is formed in the mode that the area being formed in the area of low pressure between the radial direction between described bearing portion is larger than this side of described inhalation area in this side of described discharging area.
By adopting described structure, the extruding force of platen can be suppressed to become excessive such unfavorable condition in this side of discharging area, contribute to the suppression of the distortion of this platen.
J () variable displacement vane pump as described in technological scheme 1, is characterized in that,
Described live axle is supported by the sliding bearing arranged in the mode of the periphery surrounding this live axle, and
On the inner peripheral surface of described sliding bearing, be formed through making every being located at the spiral chute formed to the mode of the direction movement be separated from described pump key element accommodation section with the working solution between the radial direction between this live axle relative to rotation between described live axle.
By adopting described structure, working solution can be made to be discharged to outside pump case energetically, thereby, it is possible to more effectively suppress the sucking-off driving axial working solution.
K () variable displacement vane pump as described in technological scheme 4, is characterized in that,
The outside of described pump key element accommodation section and described pump case can be communicated with the radial clearance of described live axle via described pump case.
By adopting described structure, the parts count of pump can be cut down, and productivity raising and cost reduction can be realized.
(l) as described in variable displacement vane pump as described in (k), it is characterized in that,
On described pump case, be provided with the drain passageway of externally being discharged by the working solution of the surrounding leaking into described live axle.
By adopting described structure, with make to leak into drive axial working solution to reflux to suction side situation compared with, contribute to the negative pressure suppressing to drive axial space.
(m) as described in variable displacement vane pump as described in (l), it is characterized in that,
Described drain passageway is configured to outboard end than inner end more by vertical downside.
By adopting described structure, the possibility entered under the operating fluid level of food tray due to outboard end uprises, beyond the attraction of gas suppressed, the raising of pump efficiency can be realized.In addition, by making the outer end of drain passageway become down vertical, the raising of the discharge of the pollutant in working solution is also contributed to.
N () variable displacement vane pump as described in technological scheme 4, is characterized in that,
Described pump case is formed by with lower component: the 1st shell having bottom tube-like, is formed by the bottom of cylindrical portion with the axial side closing this cylindrical portion; 2nd shell, closes the opposite side opening of described cylindrical portion,
The outboard end opening of described suction passage is formed in described cylindrical portion.
By adopting described structure, compared with situation about being formed on the 2nd shell, the opening area of suction passage can be guaranteed significantly, and the raising of suction efficiency can be realized.
O () variable displacement vane pump as described in technological scheme 4, is characterized in that,
Described suction passage is communicated with from axial both sides relative to described inhalation area,
In the position relative with described rotor of an end wall of described pump key element accommodation section, be provided with to import and discharge the lubrication groove that pressure carries out the slip lubrication of described rotor.
By adopting described structure, by being imported into the discharge pressure of lubrication groove, the impact of the negative pressure of inhalation area side can be avoided to relate to the unfavorable condition driving axial space such.
P () variable displacement vane pump as described in technological scheme 4, is characterized in that,
Described drive shaft side Sealing portion and described low pressure chamber side sealing parts are formed on split ground respectively.
By adopting described structure, being connected with a part for two sealed members and compared with situation about forming integratedly, there is the advantage of the shape that can simplify each sealed member.
Claims (13)
1. a variable displacement vane pump, is characterized in that, has:
Pump case, has pump key element accommodation section;
Live axle, is bearing on described pump case by axle;
Rotor, is arranged in described pump case, is driven in rotation by described live axle, and circumferentially have multiple groove;
Multiple blade, can be arranged in described groove with freeing in and out;
Cam ring, can be arranged on movably in described pump key element accommodation section, be formed as ring-type, form multiple pump chamber in inner circumferential side together with described rotor and described blade;
Suction port, is formed on described pump case, to the inhalation area opening that the volume in described multiple pump chamber increases with the rotation of described rotor;
Suction passage, is arranged on described pump case, and the food tray of storage working solution is communicated with described suction port;
Platen, using the running shaft of described live axle as time axial, in described pump key element accommodation section, axially described, is relatively arranged with described rotor and described cam ring;
Exhaust port, is arranged on described platen, in the discharging area that the volume in described multiple pump chamber reduces with the rotation of described rotor, runs through described platen ground opening along described axis;
Hyperbaric chamber, using during around the direction of described running shaft as circumference, be formed on described pump case, with relatively arranging with the opposition side of described rotor and the relative side of described cam ring and compression face side in the described axial both ends of the surface of described platen, be imported into via described exhaust port and discharge pressure, thus, described platen is exerted a force to described rotor and this side of described cam ring; And low pressure chamber, in the circumferential direction, be formed in the position corresponding with described inhalation area, and be imported into suction pressure;
Live axle through hole, is arranged on described platen, runs through for described live axle;
Drive shaft side Sealing, is arranged on this side of described compression face of described platen, is formed as ring-type in the mode of surrounding described live axle through hole, and separates in described live axle through hole and described hyperbaric chamber; And low pressure chamber side seal, be formed as ring-type in the mode of surrounding described inhalation area, separate described inhalation area, described hyperbaric chamber and described live axle through hole.
2. variable displacement vane pump as claimed in claim 1, is characterized in that, via the gap between described pump case and described live axle, can be communicated with described pump key element accommodation section and described pump case outside.
3. variable displacement vane pump as claimed in claim 2, it is characterized in that having drain passageway, it is arranged on described pump case, the working solution leaked is discharged to the outside around described live axle.
4. variable displacement vane pump as claimed in claim 3, is characterized in that, described drain passageway to be configured in than inner end with the outboard end of described drain passageway and more to be formed by the mode on the downside of vertical direction.
5. variable displacement vane pump as claimed in claim 1, is characterized in that,
Described pump case is formed by with lower component: the 1st housing department of cup-shaped, is formed by cylindrical portion with the mode of the axial side closing described cylindrical portion and the integrated bottom of described cylindrical portion; 2nd housing department, is formed in combination with the mode and described 1st housing department of closing the axial opposite side of described cylindrical portion,
The outboard end side opening portion of described suction passage is formed in the described cylindrical portion of described 1st shell.
6. variable displacement vane pump as claimed in claim 1, it is characterized in that, described suction passage is formed communicatively from described inhalation area and described axial both sides respectively,
Described pump case has lubrication groove, and it is axially arranged on the position relative with described rotor relative to described rotor with the opposition side of described platen described, and has been imported into discharge pressure.
7. variable displacement vane pump as claimed in claim 1, is characterized in that, described drive shaft side Sealing and described low pressure chamber side seal split ground are formed.
8. variable displacement vane pump as claimed in claim 7, is characterized in that, described pump case has the high pressure lead-in groove of will discharge between the pressure described drive shaft side Sealing of importing and described low pressure chamber side seal portion.
9. variable displacement vane pump as claimed in claim 7, it is characterized in that, described pump case has: the drive shaft side seal groove connected for described drive shaft side Sealing; Low pressure chamber side sealing groove, connects for described low pressure chamber side seal, and with the liftoff setting of described drive shaft side Sealing part.
10. variable displacement vane pump as claimed in claim 7, it is characterized in that, described pump case has: the drive shaft side seal groove connected for described drive shaft side Sealing; For the low pressure chamber side sealing groove that described low pressure chamber side seal connects,
Described drive shaft side seal groove and described low pressure chamber side sealing groove are formed continuously in the region that described drive shaft side Sealing is adjacent with described low pressure chamber side seal.
11. variable displacement vane pumps as claimed in claim 1, is characterized in that, described drive shaft side Sealing and described low pressure chamber side seal interconnectedly one-body molded.
12. variable displacement vane pumps as claimed in claim 1, it is characterized in that, described drive shaft side Sealing is formed in the mode that the area being formed in the area of low pressure between itself and described live axle through hole is larger than this side of described inhalation area in this side of described discharging area in the circumferential direction.
13. variable displacement vane pumps as claimed in claim 1, is characterized in that, the sliding bearing that the mode with the outer circumferential side surrounding described live axle is arranged,
Described sliding bearing has spiral chute, and it is formed in inner circumferential side, and with the working solution between described sliding bearing and described live axle because of with being formed to the mode of the direction movement be separated from this side, described pump key element accommodation section relative to rotation of described live axle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-045815 | 2014-03-10 | ||
| JP2014045815A JP2015169156A (en) | 2014-03-10 | 2014-03-10 | Variable capacity type vane pump |
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| CN104912790A true CN104912790A (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510103388.2A Pending CN104912790A (en) | 2014-03-10 | 2015-03-10 | Variable displacement vane pump |
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| Country | Link |
|---|---|
| US (1) | US20150252802A1 (en) |
| JP (1) | JP2015169156A (en) |
| CN (1) | CN104912790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973382A (en) * | 2017-12-27 | 2019-07-05 | 株式会社捷太格特 | Pump installation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR201617408A2 (en) * | 2016-11-29 | 2017-01-23 | Hema Enduestri Anonim Sirketi | A VARIABLE DISPLACEMENT CRAWLER PUMP WITH INCREASED SUCTION PERFORMANCE |
| CN110139987B (en) * | 2016-12-28 | 2021-03-16 | 日立汽车系统株式会社 | Oil pump and oil pump integrated balancer device |
| DE102019110905A1 (en) * | 2019-04-26 | 2020-10-29 | Schwäbische Hüttenwerke Automotive GmbH | Vane pump with pressure compensation connection |
| CN110242565A (en) * | 2019-06-18 | 2019-09-17 | 江苏德华泵业有限公司 | A kind of marine diesel emergency fire pump |
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| CN1746502A (en) * | 2001-08-31 | 2006-03-15 | 尤尼西亚Jkc控制系统株式会社 | Variable displacement pump |
| CN101173659A (en) * | 2006-10-30 | 2008-05-07 | 株式会社昭和 | Variable displacement pump |
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| JP2012163040A (en) * | 2011-02-07 | 2012-08-30 | Hitachi Automotive Systems Ltd | Vane pump |
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| IT1222563B (en) * | 1986-09-30 | 1990-09-05 | Brasil Compressores Sa | HORIZONTAL CRANKSHAFT HERMETIC COMPRESSOR |
| JP3861638B2 (en) * | 2001-08-31 | 2006-12-20 | ユニシア ジェーケーシー ステアリングシステム株式会社 | Variable displacement pump |
-
2014
- 2014-03-10 JP JP2014045815A patent/JP2015169156A/en active Pending
-
2015
- 2015-02-04 US US14/613,451 patent/US20150252802A1/en not_active Abandoned
- 2015-03-10 CN CN201510103388.2A patent/CN104912790A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1746502A (en) * | 2001-08-31 | 2006-03-15 | 尤尼西亚Jkc控制系统株式会社 | Variable displacement pump |
| CN101173659A (en) * | 2006-10-30 | 2008-05-07 | 株式会社昭和 | Variable displacement pump |
| JP2010001810A (en) * | 2008-06-20 | 2010-01-07 | Kayaba Ind Co Ltd | Variable displacement vane pump |
| JP2012163040A (en) * | 2011-02-07 | 2012-08-30 | Hitachi Automotive Systems Ltd | Vane pump |
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| CN109973382A (en) * | 2017-12-27 | 2019-07-05 | 株式会社捷太格特 | Pump installation |
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| US20150252802A1 (en) | 2015-09-10 |
| JP2015169156A (en) | 2015-09-28 |
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Application publication date: 20150916 |