CN105715532A - Parallel shaft type conjoined hydraulic pump motor - Google Patents

Parallel shaft type conjoined hydraulic pump motor Download PDF

Info

Publication number
CN105715532A
CN105715532A CN201610210839.7A CN201610210839A CN105715532A CN 105715532 A CN105715532 A CN 105715532A CN 201610210839 A CN201610210839 A CN 201610210839A CN 105715532 A CN105715532 A CN 105715532A
Authority
CN
China
Prior art keywords
pump
motor
swash plate
housing
assembly
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.)
Granted
Application number
CN201610210839.7A
Other languages
Chinese (zh)
Other versions
CN105715532B (en
Inventor
荆崇波
苑士华
周俊杰
魏超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Institute of Technology BIT
Original Assignee
Beijing Institute of Technology BIT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Institute of Technology BIT filed Critical Beijing Institute of Technology BIT
Priority to CN201610210839.7A priority Critical patent/CN105715532B/en
Publication of CN105715532A publication Critical patent/CN105715532A/en
Application granted granted Critical
Publication of CN105715532B publication Critical patent/CN105715532B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00

Abstract

The invention belongs to the technical field of fluid transmission and control, and particularly relates to a hydraulic conjoined pump motor. According to the technical scheme of the parallel shaft type conjoined hydraulic pump motor, an axial plunger variable pump and an axial plunger constant displacement motor are integrated in a shell to form a closed type hydraulic transmission system, and the parallel shaft type conjoined hydraulic pump motor comprises a rear cover 1, the shell 2, a revolving body assembly 3, a motor swash plate 11, a pull rod assembly 4, a pump swash plate and a supporting structure 5 thereof, a servo variable cylinder 6, a multifunctional valve assembly 7 and a flush valve assembly 8. The supporting structure 5 of the variable pump swash plate is simplified, a tensioning mechanism is added between the shell 2 and the rear cover 1, and reliability of operation of the overall motor is improved.

Description

A kind of conjuncted hydraulic pump motor of parallel-axis type
Technical field
The invention belongs to Fluid Transmission and Control technical field, be specifically related to a kind of conjuncted pump motor of hydraulic pressure.
Background technology
Axial plunger pump/motor has operating pressure height, rotating speed height, efficiency advantages of higher, is widely applied in the field such as industrial or agricultural and national defence.Oblique tray type axial plunger piston variable pump and fixed displacement motor are integrated in a housing the conjuncted pump-motor system of enclosed formed, have power density height, compact conformation, without external high-pressure oil passage, the features such as infinitely variable speeds can be realized, it is adaptable to walking arrangement fluid power system and endless-track vehicle hydraulic steering system.Existing oblique tray type axial plunger piston variable pump many employings cylindrical roller half-and-half bearing is as the support component of variable swash plate, and including raceway, retainer, guide finger, position-limit mechanism etc., structure is complicated, and reliability is relatively low.Further, since after pump and motor being become one, the separating force produced due to the effect of hydraulic oil between conjuncted pump motor shell and bonnet is relatively big, so that housing and bonnet produce moderate finite deformation, affect the normal operation of pump motor Port Plate Pair.
Summary of the invention
It is an object of the invention to: because the deficiencies in the prior art, the present invention proposes the conjuncted pump motor of a kind of new construction, simplifies the supporting construction of variable pump swash plate, and adds tensioning mechanism between housing and bonnet, improve the reliability of complete machine work.
The technical scheme is that a kind of conjuncted hydraulic pump motor of parallel-axis type, it includes: bonnet, housing, revolving body assembly, end cap, the motor spindle being arranged in parallel, pump main shaft, rod assembly and pump swash plate and a support component thereof;
Rod assembly includes: pull bar, pressing plate, spring pad and nut;
Pump swash plate and a support component thereof include: pump swash plate, half-and-half bearing roller, raceway and return plate pressing plate;
Integrated connection relation is: motor spindle and pump main axis parallel are arranged in housing, and realizes sealing by bonnet, end cap;Motor swashplate is fixed in housing, and pump swash plate is arranged in the corresponding arc track of housing by half-and-half bearing roller, raceway;Two set revolving body assemblies by spline respectively with the spline fitted of motor spindle and pump main shaft;Plunger piston slippery boots assembly in two set revolving body assemblies is pressed on the surface of pump swash plate, motor swashplate, and pump main shaft place plunger piston slippery boots assembly is carried out auxiliary and compresses by two panels return plate pressing plate;Pull bar through between housing and bonnet axially through hole, and by pressing plate, spring pad and nut tension.
Beneficial effect: (1) present invention adopts return plate pressing plate as one of confinement element of half-and-half bearing roller, it is prevented that half-and-half bearing roller departs from raceway, simplifies half-and-half bearing supporting construction, adds roller quantity, and then improve the bearing capacity of half-and-half bearing.
(2) present invention adds rod assembly between bonnet and housing, rod assembly receiving portion split axle is to hydraulic coupling, reduce the deformation of bonnet and housing in work process, make maintenance good working order between valve plate and cylinder body, be conducive to operating pressure and the volumetric efficiency of raising system.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of the present invention;
Fig. 2 is the side view of the present invention;
Fig. 3 is pump swash plate cross-sectional view in the present invention;
The restrained condition of return plate double bearing roller of pressing plate when Fig. 4 is pump swash plate zero pivot angle;
The restrained condition of return plate double bearing roller of pressing plate when Fig. 5 is pump swash plate swash plate maximum pendulum angle.
Detailed description of the invention
Referring to accompanying drawing, a kind of conjuncted hydraulic pump motor of parallel-axis type, it includes: motor spindle 18 and pump main shaft 19, bonnet 1, housing 2, revolving body assembly 3, rod assembly 4, pump swash plate and a support component 5, servo variable displacement cylinder 6, multifunction valve 7, flushing valve 8, valve plate 10, motor swashplate 11 and end cap 13;
Revolving body assembly 3 includes: cylinder body 3a, return plate 3b, spherical hinge 3c, packing ring 3d, central spring 3e, little spring 3f, back-up ring 3g and plunger piston slippery boots assembly 3h;Central spring 3e is compressed in the centre bore of cylinder body 3a by packing ring 3d and back-up ring 3g;Little spring 3f is arranged in the hole of spherical hinge 3c, and spherical hinge 3c is arranged on the front end of cylinder body 3a;Plunger piston slippery boots assembly 3h is arranged in the cycle hole of cylinder body 3a;
Rod assembly 4 includes: pull bar 4a, pressing plate 4b, spring pad 4c and nut 4d;
Pump swash plate and a support component 5 thereof include: pump swash plate 5a, half-and-half bearing roller 5b, raceway 5c and return plate pressing plate 5d;
Integrated connection relation is: motor swashplate 11 is fixed on housing 2 by pin 12, and pump swash plate 5a is supported on housing 2 by half-and-half bearing roller 5b and raceway 5c;Motor spindle 18 and pump main shaft 19 are supported between bonnet 1 and housing 2 by roller bearing 15 and sliding bearing 21, are arranged in parallel;Two set revolving body assemblies 3 are connected with motor spindle 18 and pump main shaft 19 by spline;The plunger piston slippery boots assembly 3h being contained in cylinder body 3a hole is pressed on the surface of pump swash plate 5a, motor swashplate 11 by spherical hinge 3c, return plate 3b, additionally, also have two panels return plate pressing plate 5d to be arranged on pump swash plate 5a by screw 5e, plunger piston slippery boots assembly 3h is carried out auxiliary and compresses;Equipped with 7, the flushing valve 8 of two multifunction valves and two valve plates 10 on bonnet 1, bonnet 1 is connected with housing 2 by bolt 9, and compresses valve plate 10 and revolving body assembly 3;Input/output terminal at pump motor is provided with the end cap 13 being provided with O-ring seals 16, spindle nose oil sealing 17, and end cap 13 is arranged on housing 2 by screw 14;In the side of housing 2, being provided with servo variable displacement cylinder 6, servo variable displacement cylinder 6 is connected with variable pull bar 23, and variable pull bar 23 is connected with pump swash plate 5a, can be changed the angle of inclination of pump swash plate 5a by servo variable displacement cylinder 6, thus realizing becoming discharge capacity;Between bonnet 1 and housing 2, also have rod assembly 4, pull bar 4a through between housing 2 and bonnet 1 axially through hole, and by pressing plate 4b, spring pad 4c and nut 4d tension.
The cross beam support of pull bar 4a one end is in the centre position of housing 2 front end face, through hole on its other end traverse housing 2 and bonnet 1, and load onto pressing plate 4b, spring pad 4c and nut 4d, by fastening nut 4d, pull bar is made to produce certain pretightning force, bonnet 1 and housing 2 are strained, enable to bear separating force bonnet 1 and housing 2 pushed open produced in a part of conjuncted pump motor operations process by high pressure liquid force feed, reduce the deformation of bonnet 1 and housing 2, the Port Plate Pair formed between cylinder body 3a and valve plate 10 is made to keep good working order, improve performance and the reliability of complete machine.
Concrete number of assembling steps is:
(1) two roller bearings 15 are attached separately on motor spindle 18 and pump main shaft 19, and good with snap ring card;The two is attached separately in the corresponding installing hole of housing 2, loads onto end cap 13 and tighten with bolt 14;End cap 13 and O-ring seals above 16 and oil sealing 17 thereof play the effect of location bearing, sealing, can simultaneously serve as pump motor and install installation seam on other devices.
(2) motor swashplate 11 is fixed on housing 2 by pin 12, the half-and-half bearing roller 5b of pump side and raceway 5c is arranged on the corresponding arc track of housing 2.
(3) packing ring 3d, central spring 3e, packing ring 3d are sequentially loaded in cylinder body 3a centre bore, and with snap ring 3g card well;Then little spring 3f is loaded in the spherical hinge corresponding hole of 3c, and be contained in cylinder body 3a end;9 plunger piston slippery boots assembly 3h are loaded in the corresponding installing hole of return plate 3b, make the circular arc ball-and-socket of return plate and plunger in same direction, finally return plate b and plunger piston slippery boots assembly 3h is assembled together with cylinder body 3a, spherical hinge 3c above, forms revolving body assembly 3.
(4) a set of revolving body assembly 3 is loaded housing 2 inner motor side, be connected with motor spindle 18 by spline;Other set revolving body assembly 3 is placed on pump swash plate 5a, and with two set return plate pressing plate 5d and bridge screw 5e, return plate 3b, plunger piston slippery boots assembly 3h are pressed on pump swash plate 5a, then pass through the fabrication hole 5f on pump swash plate 5a, by frock, above-mentioned parts are loaded the side of housing 2 pump, make the spline fitted of spline and the pump main shaft 19 of cylinder body 3a, spherical hinge 3c, and make pump swash plate 5a drop on half-and-half bearing roller 5b.
(5) two multifunction valves 7 are arranged on bonnet 1 in corresponding installing hole, one flushing valve 8 is contained on bonnet 1 by screw, two sliding bearings 21 are loaded on bonnet 1 in corresponding spindle mounting hole, finally two valve plates 10 are contained on bonnet 1 by valve plate alignment pin 20.
(6) the revolving body assembly 3 etc. that the assembly (5th) step assembled and housing 2 and inside thereof have installed is assembled into one, make motor spindle 18 and pump main shaft 19 insert the plain bearing bore of the support set assembly 21 being positioned on bonnet 1, and connect by bolt 9 and tighten;By rod assembly 4 by the hole on housing 2 and bonnet 1, from spindle nose one end through bonnet 1 one end, and by pressing plate 4b, spring pad 4c and nut 4d tension.
(7) in the housing side of pump motor, install servo variable displacement cylinder assembly 6, and be run through bearing pin 24, pin 25 is connected with variable pull bar 23, can change the angle of inclination of pump swash plate 5a by it, thus realize pump delivery change.
Preferably, under meeting the premise that plunger stiffness requires, it is possible to be hollow-core construction by the plunger design of the plunger piston slippery boots assembly 3h described in such scheme.Adopt hollow-core construction to alleviate plunger quality, reduce the quality of plunger, the inertia force produced when reducing plunger high-speed motion, be conducive to improving the working speed of hydraulic pump motor;By being closed by plunger cavity, reduce " dead volume " of plunger cavity, be conducive to reducing the compression shock of pump motor, vibration, noise and cavitation erosion, be conducive to improving the volumetric efficiency of pump motor.

Claims (3)

1. the conjuncted hydraulic pump motor of parallel-axis type, it includes: bonnet (1), housing (2), revolving body assembly (3), end cap (13), the motor spindle (18) that is arranged in parallel, pump main shaft (19), is characterized in that, it also includes: rod assembly (4) and pump swash plate and a support component (5) thereof;
Described rod assembly (4) including: pull bar (4a), pressing plate (4b), spring pad (4c) and nut (4d);
Described pump swash plate and a support component (5) thereof including: pump swash plate (5a), half-and-half bearing roller (5b), raceway (5c) and return plate pressing plate (5d);
Integrated connection relation is: described motor spindle (18) and described pump main shaft (19) are arranged in parallel in described housing (2), and realizes sealing by described bonnet (1), described end cap (13);Described motor swashplate (11) is fixed in described housing (2), and described pump swash plate (5a) is arranged in the corresponding arc track of described housing (2) by described half-and-half bearing roller (5b), described raceway (5c);Two overlap described revolving body assemblies (3) by spline respectively with the spline fitted of described motor spindle (18) and described pump main shaft (19);Two plunger piston slippery boots assemblies (3h) overlapped in described revolving body assembly (3) are pressed on the surface of described pump swash plate (5a), described motor swashplate (11), and plunger piston slippery boots assembly (3h) described in described pump main shaft (19) place is carried out auxiliary and compresses by return plate pressing plate (5d) described in two panels;Described pull bar (4a) through between described housing (2) with described bonnet (1) axially through hole, and strained by described pressing plate (4b), described spring pad (4c) and described nut (4d).
2. a kind of conjuncted hydraulic pump motor of parallel-axis type as claimed in claim 1, it is characterised in that: described end cap (13) is arranged above with O-ring seals (16) and oil sealing (17).
3. a kind of conjuncted hydraulic pump motor of parallel-axis type as claimed in claim 1 or 2, it is characterised in that: the plunger of described plunger piston slippery boots assembly (3h) is hollow-core construction.
CN201610210839.7A 2016-04-06 2016-04-06 A kind of conjuncted hydraulic pump motor of parallel-axis type Active CN105715532B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610210839.7A CN105715532B (en) 2016-04-06 2016-04-06 A kind of conjuncted hydraulic pump motor of parallel-axis type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610210839.7A CN105715532B (en) 2016-04-06 2016-04-06 A kind of conjuncted hydraulic pump motor of parallel-axis type

Publications (2)

Publication Number Publication Date
CN105715532A true CN105715532A (en) 2016-06-29
CN105715532B CN105715532B (en) 2018-08-24

Family

ID=56159677

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610210839.7A Active CN105715532B (en) 2016-04-06 2016-04-06 A kind of conjuncted hydraulic pump motor of parallel-axis type

Country Status (1)

Country Link
CN (1) CN105715532B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107178497A (en) * 2017-06-06 2017-09-19 中国北方车辆研究所 A kind of integrated flow oil circuit casting of conjuncted hydraulic pump motor
CN107246424A (en) * 2017-06-05 2017-10-13 中国北方车辆研究所 Conjuncted hydraulic pump motor automatic cycle tests Pneumatic operating mechanism

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874962A (en) * 1994-09-09 1996-03-19 Kubota Corp Static oil pressure-type continuously variable transmission
CN1233720A (en) * 1999-05-18 1999-11-03 徐维胜 Double inclined plate synchronous rotation internal power split stream hydraulic variable speed unit
CN1900557A (en) * 2006-07-21 2007-01-24 贵州金江航空液压有限责任公司 Double variable hydraulic driving method and its device for hand servo control
CN203730685U (en) * 2014-01-15 2014-07-23 浙江阿凡特精密设备制造有限公司 Agricultural machine hydraulic stepless speed-change device
CN204212963U (en) * 2014-09-28 2015-03-18 宁波广天赛克思液压有限公司 A kind of swash plate supporting structure of Variable plunger pump
CN204878581U (en) * 2015-08-26 2015-12-16 浙江奥威特液压机械有限公司 Hydrostatic infinitely variable speed device
CN205638889U (en) * 2016-04-06 2016-10-12 北京理工大学 Conjuncted hydraulic pump motor of parallel shaft type

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874962A (en) * 1994-09-09 1996-03-19 Kubota Corp Static oil pressure-type continuously variable transmission
CN1233720A (en) * 1999-05-18 1999-11-03 徐维胜 Double inclined plate synchronous rotation internal power split stream hydraulic variable speed unit
CN1900557A (en) * 2006-07-21 2007-01-24 贵州金江航空液压有限责任公司 Double variable hydraulic driving method and its device for hand servo control
CN203730685U (en) * 2014-01-15 2014-07-23 浙江阿凡特精密设备制造有限公司 Agricultural machine hydraulic stepless speed-change device
CN204212963U (en) * 2014-09-28 2015-03-18 宁波广天赛克思液压有限公司 A kind of swash plate supporting structure of Variable plunger pump
CN204878581U (en) * 2015-08-26 2015-12-16 浙江奥威特液压机械有限公司 Hydrostatic infinitely variable speed device
CN205638889U (en) * 2016-04-06 2016-10-12 北京理工大学 Conjuncted hydraulic pump motor of parallel shaft type

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107246424A (en) * 2017-06-05 2017-10-13 中国北方车辆研究所 Conjuncted hydraulic pump motor automatic cycle tests Pneumatic operating mechanism
CN107178497A (en) * 2017-06-06 2017-09-19 中国北方车辆研究所 A kind of integrated flow oil circuit casting of conjuncted hydraulic pump motor
CN107178497B (en) * 2017-06-06 2019-05-10 中国北方车辆研究所 A kind of integrated flow oil circuit casting of conjuncted hydraulic pump motor

Also Published As

Publication number Publication date
CN105715532B (en) 2018-08-24

Similar Documents

Publication Publication Date Title
CN208749529U (en) A kind of liquid nitrogen pump power end assembly
CN205638889U (en) Conjuncted hydraulic pump motor of parallel shaft type
CN105715532A (en) Parallel shaft type conjoined hydraulic pump motor
CN100424342C (en) Oscillating disc sliding valve pintle axial plunger pump (motor)
CN201461287U (en) Plunger piston variable hydraulic pump
CN101550920B (en) Plunger variable pump
CN202100456U (en) Aluminum alloy steering pump
CN1970372A (en) Integral type manual hydraulic lifting device for driving cabin turn-over
CN104196693B (en) Reciprocating four cylinder slush pumps
CN203201737U (en) Manual variable twin plunger pump
CN210799244U (en) Novel high-pressure plunger pump
CN104279020A (en) Fixing chain type engine valve drive device
CN202746131U (en) Swash plate type variable displacement piston pump
CN102635546A (en) Plunger pump with composite shell
CN108317118B (en) Buckle type split plunger pump swash plate variable adjusting mechanism and adjusting method
CN105114278B (en) Axial plunger pump
CN101238290B (en) Displacer unit with a valve plate body
CN208416833U (en) A kind of sphere static pressure driving structure and bent axis type axial piston pump or motor comprising the structure
CN112377382B (en) Variable axial plunger pump based on proportional pressure reducing valve control
CN106438255A (en) Coaxial and same-side compact type variable structure applicable to bidirectional variable-displacement plunger pump
CN210062601U (en) Central hydraulic adjustable suspension system
CN216381804U (en) Variable plunger pump
CN203374334U (en) Chain fixing type engine valve driving device
CN108412717B (en) Unmanned ship hydraulic pump sliding shoe bottom static pressure supporting device and control method
CN110067723A (en) A kind of sphere static pressure driving structure and bent axis type axial piston pump or motor comprising the structure

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant