WO2020136471A1 - Vane pump having hollow pivot pin with fastener - Google Patents

Vane pump having hollow pivot pin with fastener Download PDF

Info

Publication number
WO2020136471A1
WO2020136471A1 PCT/IB2019/060050 IB2019060050W WO2020136471A1 WO 2020136471 A1 WO2020136471 A1 WO 2020136471A1 IB 2019060050 W IB2019060050 W IB 2019060050W WO 2020136471 A1 WO2020136471 A1 WO 2020136471A1
Authority
WO
WIPO (PCT)
Prior art keywords
pivot pin
housing
slide
vane pump
cover
Prior art date
Application number
PCT/IB2019/060050
Other languages
French (fr)
Inventor
Lixia SHI
Original Assignee
Stackpole International Engineered Products, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US201862785960P external-priority
Application filed by Stackpole International Engineered Products, Ltd. filed Critical Stackpole International Engineered Products, Ltd.
Priority to JP2021537706A priority Critical patent/JP2022516609A/en
Priority to EP19904774.7A priority patent/EP3903003A4/en
Priority to KR1020217022758A priority patent/KR20210108424A/en
Priority to CA3124923A priority patent/CA3124923A1/en
Publication of WO2020136471A1 publication Critical patent/WO2020136471A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-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
    • F04C2/34Rotary-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
    • F04C2/344Rotary-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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10Outer members for co-operation with rotary pistons; Casings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22Control 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
    • F04C14/223Control 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
    • F04C14/226Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-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
    • F04C2/34Rotary-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
    • F04C2/344Rotary-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
    • F04C2/3441Rotary-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
    • F04C2/3442Rotary-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 the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16NLUBRICATING
    • F16N13/00Lubricating-pumps
    • F16N13/20Rotary pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/20Rotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/30Casings or housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00Components
    • F04C2240/80Other components
    • F04C2240/805Fastening means, e.g. bolts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00Function
    • F05B2260/30Retaining components in desired mutual position
    • F05B2260/301Retaining bolts or nuts

Abstract

Disclosed is a vane pump including a housing, a pivot pin having a hollow portion mounted within the housing, a control slide displaceable about the pivot pin within the housing between a first slide position and a second slide position to adjust displacement of the pump through an outlet, and a cover attached to the housing via a fastener passing through the pivot pin such that the control slide rotates about the pivot pin with respect to the housing and the cover. In an example, the fastener passes through to the engine mount. The pivot pin does not create a fluid path through the hollow portion.

Description

VANE PUMP HAVING HOLLOW PIVOT PIN WITH FASTENER
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The subject application claims priority to U.S. Provisional Patent Application No. 62/785,960, filed December 28, 2018, the subject matter of which is incorporated herein by reference in its entirety.
BACKGROUND
FIELD
[0002] This disclosure relates generally to a vane pump. More particularly, the present disclosure relates to a pivot pin and assembly of a vane pump.
DESCRIPTION OF THE RELATED ART
[0003] Vane pumps are known for use for pumping fluids or lubricants, such as oil in automobiles. The vane pumps include vanes that move radially with respect to an
eccentrically mounted rotor within a housing. Movement of the rotors and the vanes create one or more control chambers volume within which the fluid may be pressurized and further discharged through an outlet of the pump. The vane pump may include a single control chamber or two control chambers for moving lubricant.
SUMMARY
[0004] An aspect of this disclosure provides a vane pump that includes a housing, a pivot pin having a hollow portion mounted within the housing, a control slide displaceable about the pivot pin within the housing between a first slide position and a second slide position to adjust displacement of the pump through an outlet, and a cover attached to the housing via a fastener passing through the pivot pin such that the control slide rotates about the pivot pin with respect to the housing and the cover. The pivot pin does not create a fluid path through the hollow portion.
[0005] Other aspects and features of the disclosure will become apparent from the following detailed description, the accompanying drawings, and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate one or more embodiments and, together with the description, explain these embodiments. The accompanying drawings have not necessarily been drawn to scale. Any values of dimensions illustrated in the accompanying graphs and figures are for illustration purposes only and may or may not represent actual or preferred values or dimensions. Where applicable, some or all features may not be illustrated to assist in the description of underlying features. In the drawings:
[0007] FIG. 1 A is a first perspective view of a vane pump, according to an embodiment of this disclosure;
[0008] FIG. IB is a second perspective view of the vane pump, according to an embodiment of this disclosure;
[0009] FIG. 2 is an exploded view of the vane pump of FIGs. 1 A and IB, according to an embodiment of this disclosure;
[0010] FIG. 3 is a view of the vane pump with cover removed illustrating a control slide arrangement, according to an embodiment of this disclosure;
[0011] FIG. 4 is a projection view of the vane pump illustrating assembly of a bolt to an engine block, according to an embodiment of this disclosure;
[0012] FIG. 5 A is a projection view when seen from a cover, according to an embodiment of this disclosure;
[0013] FIG. 5B is a cross-section view through a section line AA of FIG. 5 A; and
[0014] FIGs. 6A, 6B, 6C, and 6D are various projection views such as a top view, a front view, a bottom view, and a side view, respectively, of the vane pump, according to an embodiment of this disclosure. DETAILED DESCRIPTION
[0015] The description set forth below in connection with the appended drawings is intended as a description of various embodiments of the disclosed subject matter and is not necessarily intended to represent the only embodiment s). In certain instances, the description includes specific details for the purpose of providing an understanding of the disclosed
embodiment(s). However, it will be apparent to those skilled in the art that the disclosed embodiment(s) may be practiced without those specific details. In some instances, well- known structures and components may be shown in block diagram form in order to avoid obscuring the concepts of the disclosed subject matter.
[0016] Reference throughout the specification to“one embodiment” or“an embodiment” means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the subject matter disclosed. Thus, the appearance of the phrases“in one embodiment” or“in an embodiment” in various places throughout the specification is not necessarily referring to the same embodiment. Further, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. Further, it is intended that embodiments of the disclosed subject matter cover modifications and variations thereof.
[0017] It is to be understood that terms such as“inner,”“outer,” and the like that may be used herein merely describe points of reference and do not necessarily limit embodiments of the present disclosure to any particular orientation or configuration. Furthermore, terms such as“first,”“second,”“third,” etc., merely identify one of a number of portions, components, steps, operations, functions, and/or points of reference as disclosed herein, and likewise do not necessarily limit embodiments of the present disclosure to any particular configuration or orientation, or any requirement that each number must be included.
[0018] FIGs. 1 A and IB are a first perspective view (when viewed from a housing side) and a second perspective view (when viewed from a cover side) of a vane pump 100 in an embodiment of this disclosure. In an embodiment, the vane pump 100 is a variable vane pump having multi -chambers. The vane pump 100 has a housing 12 and a cover 2 attached to the housing 12. The cover 2 attaches to the housing 12, via for example, fasteners 26, and 27 inserted into various fastener bores provided along a periphery of the cover 2 and the housing 12. Several internal components (e.g., vanes 7, rotor 5, pivot pin 4, etc. shown in FIG. 2) of the vane pump 100 are enclosed between the housing 12 and the cover 2. The vane pump 100 further comprises a valve controller 18 housed within the housing 12. The internal components of the vane pump 100 are not visible in the FIGs. 1 A and IB, but illustrated in an exploded view of the vane pump 100 in FIG. 2.
[0019] The housing 12 (e.g., in FIGs. 1 A-1B and 2) has an inlet 28 for receiving fluid into the housing 12, and an outlet 29 for discharging or delivering the pressurized fluid to a system, e.g., an engine. The housing 12 may be made of any material, and may be formed by aluminum die cast, iron casting, or any other known manufacturing techniques. The housing 12 may enclose internal chambers such as a first control chamber 126 and possibly a second chamber 127 between the housing 12 and a control slide 25 (shown in FIG. 3) for selectively receiving pressurized fluid or vent pressure via 127. In an embodiment, the first control chamber 126 and the second chamber 127 are on either side of the pivot pin 4 (shown in FIGs. 2 and 3) and isolated from each other. The first chamber 126 always has a feedback pressure, while the second chamber 127 may have pressure or vented depending on the valve controller 18. In other words, the first chamber 126 and the second chamber 127 are not fluidically connected around the pivot pin 4. The first control chamber 126 receives pressured fluid to move the control slide 25 to decrease its eccentricity relative to the rotor 5 for reducing pump displacement. Another chamber 128 is connected to the outlet portion and outlet of the pump that allows, for example, outlet oil to pass over and/or under the slide 25. Yet another chamber 124 is connected to the inlet and assists in limiting leakage from chambers 126, 127. The housing 12 may include a chamber for housing the valve controller 18, which may be configured to deliver the pressurized fluid from the first chambers 126 of the pump. The valve controller 18 may be connected to the housing 12 via a clip 19.
[0020] The cover 2 may be made of any material, and may be formed by aluminum die cast, powdered metal forming, forging, or any other desired manufacturing technique. A gasket or other seal(s) may optionally be provided between the cover 2 and peripheral wall of the housing 12 to seal the internal chambers. The housing 12 and cover 2 includes various surfaces for accommodating movement and sealing engagement (e.g. slide seal 14 and a slide seal support 13 in FIG. 2) of the control slide 25.
[0021] FIG. 2 is an exploded view of the vane pump 100 illustrating internal components of the pump disposed between the cover 2 and the housing 12. For example, the internal components include a dowel pin 3 (e.g., for alignment of components such as the cover 2 and housing 12), the pivot pin 4 coupled to the control slide 25, the rotor 5, two vane rings 6 on either side of the rotor 5, a plurality of vanes 7 (collectively referred as vanes 7), the control slide 25 assembled with the slide seal support 13 and the slide seal 14, a spring 15, and a relief mechanism comprising a relief ball 11, a relief spring 10, a cup plug 9, and a circlip 8.
[0022] With reference to FIGs. 2 and 3, the control slide 25 is displaceable within the housing 12 and relative to the cover 2. For example, the control slide 25 may occupy a first slide position, a neutral/default position, and a second slide position to adjust displacement of the vane pump 100 through the outlet. In an embodiment, the control slide 25 is pivotally mounted (e.g., about the pivot pin 4) and configured for pivotal displacement within the housing 12 between the first and second slide positions (e.g., from its neutral position to a minimum displacement position). More specifically, it may include any number of positions that is away from the first slide position, and may, in one embodiment, include when the slide is close to a minimum displacement position, or may be the minimum displacement position. The control slide 25 may be pivotally mounted relative to the first control chamber 126 and the second control chamber 127 within the housing 12.
[0023] The first control chamber 126 is provided in the housing 12 relative to a first side of the control slide 25, provided on one side of the pivot pin 4, while the second chamber 127 is provided on an opposite, second side of the control slide 25, provided on the other side of the pivot pin 4. In an embodiment, the chambers 126 and 127 are isolated from one another and do not communicate (e.g., fluidically) with each other. The chambers 126 and 127 are not connected to each other and the chamber 127 is connected to the inlet. A positive pressure of force from the pressurized lubricant may be applied or supplied to the control chamber 126 that may urge the slide 25 to move in a second direction opposite the first direction towards its second slide position (or second pivotal direction) to decrease the pump output flow (i.e., by decreasing the eccentricity). That pressure may be fed back from the outlet side of the pump or the external system.
[0024] Specifically, in an embodiment wherein the control slide 25 pivots, the pivot pin 4 or similar feature may be provided to guide the pivoting action of the control slide 25. In an embodiment, the pivot pin 4 may be rotatably mounted to the housing 12 and cover 2 and the control slide 25 may be fixed to the pivot pin, so that the pivot pin 4 and thereby the control slide 25 are free to pivot or rotate in the cover 2 and housing 12. The configuration of the pivotal connection of the control slide 25 in the housing 12 is not limited. In an embodiment, the control slide 25 is rotationally fixed to the pivot pin 4 for pivoting along an axis. More specifically, in an embodiment, the pivot pin 4 is designed to be press fit within an opening of the control slide 25. Outer surface(s) of the pivot pin 4 may be coupled and/or in contact with a surface of the control slide 25, for example.
[0025] In an embodiment, the pivot pin 4 may be fixed (e.g., by press fit) with respect to the housing 12 and the cover 2, while the control slide 25 is free to rotate about the pivot pin 4.
[0026] The pivot pin 4 (shown in FIGs. 2, 3, 4, 5A-5B and 6A-6D) is a hollow pin with open ends to receive a fastening device (interchangeably referred as a fastener) such as a bolt, a shaft and a screw. The pivot pin 4 has a substantially cylindrical shape taking a form of a hollow tubular cylinder. In an embodiment, the pivot pin 4 provide a structure for a fastening device (e.g., the bolt 21) that allows, for example, an additional means for fastening the cover 2 to the engine block in this case, or in another case the cover 2 could be bolted to housing 12 without creating additional fastening structure such as a fastening hole on the housing 12 and/or the cover 2. Thus, the pivot pin 4 saves space and creates a compact vane pump design. In an embodiment, the additional bolt 21 prevents a gap from being formed between the cover 2 and the housing 12, thus preventing leakage of fluid thorough the gap. An external surface (i.e., circumferential surface) of the pivot pin 4 may be free of any holes or grooves, thus fluid may not enter the hollow portion 4a (see FIG. 3) of the pivot pin from chambers (e.g., 126) around the pivot pin 4. In an embodiment, the hollow portion 4a of the pivot pin 4 may be threaded to correspond to the threading of the fastening device (e.g., the bolt 21).
[0027] When the fastening device (e.g., the bolt 21) is inserted through the pivot pin 4, the hollow portion and the open ends are substantially closed and do not provide a fluid path through the hollow portion of the pivot pin 4. Thus, in operation, the fluid within or around the vane pump 100 may not flow through the pivot pin 4. In an embodiment, the fastening device is not in contact with the fluid within the housing 12. In an embodiment, the bolt 21 can be inserted through the housing 12 (see FIGs. 1 A, 4, 5 A, 6 A, 6C-6D) into the hollow portion of the pivot pin 4 and further extending out from the cover 2 (see FIGs. IB, 5B and 6A-6D) to allow attachment of a nut. In an embodiment, a nut provides a means for providing variable pressure for firmly tightening (or detaching) the cover 2 to the housing 12. Also, as shown in a cross-section view of FIG. 5B, the pivot pin 4 partially extends through the cover 2 and is partially enclosed within the housing 12, thus, the hollow portion is not accessible to fluid trapped between the housing 12 and the cover 2. As such, no fluid path is created through the hollow portion of the pivot pin 4. [0028] Furthermore, the pivot pin 4 keeps the second chamber 127 isolated from the control chamber 126, for example, since the pivot pin 4 does not create a fluid path for the fluid to pass through the hollow portion and/or to pass to either side of the pin 4 within the housing 12 where the chambers 127 and 126 are located (shown in FIG. 3), as discussed earlier. The pivot pin 4 also provides a location dowel for mounting pump to engine block.
[0029] In an embodiment, the control slide 25 is pivoted about the pivot pin 4 (e.g., shown in FIG. 3) to alter the position and motion of the rotor 5 and vane(s) 7 relative to an inner surface of the control slide 25, thus, altering the displacement of the pump and distribution of fluid through the outlet without passing the fluid through the hollow portion of the pivot pin 4. The spring 15 biases or urges the control slide 25 in the first direction towards its first slide position (or first pivotal direction or position, or a maximum displacement position). While the control slide 25 pivots from the first position to the second position, the fluid may be pressurized without passing through the hollow portion of the pivot pin 4.
[0030] Referring to FIG. 3, the rotor 5 has one radially extending vanes 7 mounted to the rotor 5 for radial movement. Specifically, each vane 7 is mounted at a proximal end in a radial slot in a central ring 6 of the rotor 5 in a manner that allows them to slide radially. Centrifugal force may force the vanes 7 radially outwardly to engage and/or maintain engagement between distal ends of the vanes 7 and the inside or inner surface of the control slide 25 during rotation thereof. This type of mounting is conventional and well known. In an embodiment, other variations may be used, such as springs in the slots for biasing the vanes radially outwardly, without limiting the scope of the present disclosure.
[0031] The spring 15 (shown in FIGs. 2 and 3) may be a coil spring or a leaf spring. In an embodiment, the spring 15 is used for biasing and/or returning the control slide 25 to its default or biased position (e.g., default position for maximum eccentricity with the rotor 5). The control slide 25 may be moved against the spring 15 to decrease eccentricity with the rotor 5 based on the pressure within the outlet of the vane pump 100 to adjust displacement and hence output flow.
[0032] The seal 14 and the slide seal support 13 (shown in FIG. 2) assist in movement of the control slide 25 between its slide positions along the walls of the housing 12, while still maintaining a seal relative to the housing 12. The seal 14 also assists in limiting leakage from each of the chambers 126, 127, 128 back to 124. [0033] A retainer 16 and a screen 17 is also included in the housing 12 (see FIG. 2). The screen 17 filters the inlet and the retainer 16 keeps the seal in place
[0034] In an embodiment, screws 26, 27 may be used for attaching the cover 2 to the housing 12. The housing 12 includes corresponding threaded holes to receive the screws 26, 27. In an embodiment, the screws 26, 27 may be attached at the periphery of the cover 2 and housing 12 without passing through or in contact with an internal component of the housing such as the control slide 25. In an embodiment, the screws 26, 27 may be flush (i.e., does not project from a surface) with a surface of the cover 2 when assembled with the housing 12.
[0035] While the principles of the disclosure have been made clear in the illustrative embodiments set forth above, it will be apparent to those skilled in the art that various modifications may be made to the structure, arrangement, proportion, elements, materials, and components used in the practice of the disclosure.
[0036] It will thus be seen that the features of this disclosure have been fully and effectively accomplished. It will be realized, however, that the foregoing preferred specific embodiments have been shown and described for the purpose of illustrating the functional and structural principles of this disclosure and are subject to change without departure from such principles. Therefore, this disclosure includes all modifications encompassed within the spirit and scope of the following claims.

Claims

WHAT IS CLAIMED IS:
1. A vane pump comprising: a housing;
a tubular pivot pin having a hollow portion mounted within the housing;
a control slide mounted to the pivot pin for displacement within the housing between a first slide position and a second slide position to adjust displacement of the pump through an outlet; and
a cover attached to the housing via a fastener passing through the pivot pin, wherein the pivot pin does not create a fluid path through the hollow portion.
2. The vane pump according to claim 1, further comprising: a control chamber on a first side of the control slide; and a second chamber on a second side of the control slide between the housing and the control slide, wherein the second chamber and the control chamber are not fluidically connected around the pivot pin.
3. The vane pump according to claim 1, wherein the fastener is a bolt passing through the housing, the hollow portion of the pivot pin, and the cover, creating an attachment between components of the pump.
PCT/IB2019/060050 2018-12-28 2019-11-21 Vane pump having hollow pivot pin with fastener WO2020136471A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2021537706A JP2022516609A (en) 2018-12-28 2019-11-21 Vane pump with hollow pivot pin with fasteners
EP19904774.7A EP3903003A4 (en) 2018-12-28 2019-11-21 Vane pump having hollow pivot pin with fastener
KR1020217022758A KR20210108424A (en) 2018-12-28 2019-11-21 vane pump with hollow slewing pin with fastener
CA3124923A CA3124923A1 (en) 2018-12-28 2019-11-21 Vane pump having hollow pivot pin with fastener

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862785960P 2018-12-28 2018-12-28
US62/785,960 2018-12-28

Publications (1)

Publication Number Publication Date
WO2020136471A1 true WO2020136471A1 (en) 2020-07-02

Family

ID=71122621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/060050 WO2020136471A1 (en) 2018-12-28 2019-11-21 Vane pump having hollow pivot pin with fastener

Country Status (7)

Country Link
US (1) US20200208630A1 (en)
EP (1) EP3903003A4 (en)
JP (1) JP2022516609A (en)
KR (1) KR20210108424A (en)
CN (2) CN211623706U (en)
CA (1) CA3124923A1 (en)
WO (1) WO2020136471A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200208630A1 (en) * 2018-12-28 2020-07-02 Stackpole International Engineered Products, Ltd. Vane pump having hollow pivot pin with fastener
CN114110398A (en) * 2021-11-30 2022-03-01 湖南机油泵股份有限公司 Variable oil pump capable of reducing pressure fluctuation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300484A1 (en) * 1973-01-05 1974-07-18 Otto Eckerle HIGH PRESSURE GEAR PUMP
US9004882B2 (en) * 2011-05-23 2015-04-14 Hitachi Automotive Systems, Ltd. Variable displacement vane pump having multiple dampening springs
CA2931444A1 (en) * 2014-09-04 2016-03-10 Stackpole International Engineered Products, Ltd. Variable displacement vane pump with thermo-compensation
US9518484B2 (en) * 2013-07-17 2016-12-13 Hitachi Automotive Systems, Ltd. Variable displacement pump
CN206545579U (en) * 2017-03-02 2017-10-10 世特科汽车工程产品(常州)有限公司 A kind of pair of relief valve constant flow pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02227590A (en) * 1989-02-28 1990-09-10 Aisin Seiki Co Ltd Variable capacity compressor
JPH0693979A (en) * 1992-09-17 1994-04-05 Unisia Jecs Corp Variable volume type vane pump
JP3775193B2 (en) * 2000-09-21 2006-05-17 株式会社ジェイテクト Pump device
JP4890604B2 (en) * 2009-11-25 2012-03-07 日立オートモティブシステムズ株式会社 Variable displacement pump
JP6165019B2 (en) * 2013-10-21 2017-07-19 日立オートモティブシステムズ株式会社 Vane pump
JP6163111B2 (en) * 2014-01-21 2017-07-12 株式会社ショーワ Vane pump unit
US10253772B2 (en) * 2016-05-12 2019-04-09 Stackpole International Engineered Products, Ltd. Pump with control system including a control system for directing delivery of pressurized lubricant
US20200208630A1 (en) * 2018-12-28 2020-07-02 Stackpole International Engineered Products, Ltd. Vane pump having hollow pivot pin with fastener

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300484A1 (en) * 1973-01-05 1974-07-18 Otto Eckerle HIGH PRESSURE GEAR PUMP
US9004882B2 (en) * 2011-05-23 2015-04-14 Hitachi Automotive Systems, Ltd. Variable displacement vane pump having multiple dampening springs
US9518484B2 (en) * 2013-07-17 2016-12-13 Hitachi Automotive Systems, Ltd. Variable displacement pump
CA2931444A1 (en) * 2014-09-04 2016-03-10 Stackpole International Engineered Products, Ltd. Variable displacement vane pump with thermo-compensation
CN206545579U (en) * 2017-03-02 2017-10-10 世特科汽车工程产品(常州)有限公司 A kind of pair of relief valve constant flow pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3903003A4 *

Also Published As

Publication number Publication date
CN111379695A (en) 2020-07-07
JP2022516609A (en) 2022-03-01
US20200208630A1 (en) 2020-07-02
EP3903003A1 (en) 2021-11-03
CA3124923A1 (en) 2020-07-02
CN211623706U (en) 2020-10-02
KR20210108424A (en) 2021-09-02
EP3903003A4 (en) 2022-09-07

Similar Documents

Publication Publication Date Title
US9534596B2 (en) Variable displacement pump
US20200208630A1 (en) Vane pump having hollow pivot pin with fastener
US20180245488A1 (en) Variable valve timing control device
US8608454B2 (en) Combined pump housing for several rated quantities
JP5261390B2 (en) Rotary pump with vane
JP6490975B2 (en) Oil pump
US6158994A (en) Grooved rotor for an internal gear pump
EP3190274B1 (en) Valve opening and closing timing control apparatus
US11480173B2 (en) Pressure relief valve integrated in pivot pin of pump
US6599111B2 (en) Vane pump having an intake groove through a side wall member
US11174864B2 (en) Vane-type gas pump
JP6243262B2 (en) Variable displacement vane pump
JP7188342B2 (en) gear pump
JP3392567B2 (en) Scroll type fluid machine
CN214836918U (en) Metering pump
US9011119B2 (en) Variable displacement pump
JP7005238B2 (en) Pump device
JP2870982B2 (en) Pump device
CN113825906A (en) Piston pump drive
KR20180102391A (en) Discharge valve and compressor having the same
KR20140014809A (en) Variable displacement swash plate type compressor
JPH08121354A (en) Vane pump

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19904774

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 3124923

Country of ref document: CA

ENP Entry into the national phase

Ref document number: 2021537706

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20217022758

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2019904774

Country of ref document: EP

Effective date: 20210728