CN103994042A - Piston type hydraulic pump with crank connecting rod structure - Google Patents

Piston type hydraulic pump with crank connecting rod structure Download PDF

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Publication number
CN103994042A
CN103994042A CN201410202452.8A CN201410202452A CN103994042A CN 103994042 A CN103994042 A CN 103994042A CN 201410202452 A CN201410202452 A CN 201410202452A CN 103994042 A CN103994042 A CN 103994042A
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CN
China
Prior art keywords
connecting rod
piston type
plunger
type hydraulic
hydraulic pump
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Granted
Application number
CN201410202452.8A
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Chinese (zh)
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CN103994042B (en
Inventor
吴凡
秦培亮
翁芸娴
钟康民
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Suzhou Polytechnic Institute of Agriculture
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Suzhou Polytechnic Institute of Agriculture
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Priority to CN201410202452.8A priority Critical patent/CN103994042B/en
Publication of CN103994042A publication Critical patent/CN103994042A/en
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Publication of CN103994042B publication Critical patent/CN103994042B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a piston type hydraulic pump with a crank connecting rod structure. The piston type hydraulic pump comprises two plunger pistons which are arranged in a containing cavity. Two air cylinders are arranged along a straight line, a connecting rod is connected with pistons of two driving mechanisms, two racks are arranged on the connecting rod in the length direction, and a machine tool is provided with two gears meshed with the racks respectively. The plunger pistons are connected to the eccentric positions of the gears through hinged rods, and the hinged rods are hinged to the gears and the plunger pistons. The piston type hydraulic pump has the advantages that the work of two plunger piston hydraulic pumps is achieved only through a symmetric rack-gear air cylinder, working efficiency is high, and the economical performance is good; the air cylinders serve as drive, and therefore the piston type hydraulic pump cannot pollute the environment; the crank connecting rod mechanism is a nonlinear mechanism, when the transmission angle and the pressure angle are large, the crank connecting rod mechanism is a stroke amplifying mechanism, and the hydraulic pump can output a low-pressure and high-flow liquid, and when the transmission angle and the pressure angle are small, the crank connecting rod mechanism is a force amplifying mechanism, and the hydraulic pump can output a high-pressure and small-flow liquid.

Description

Adopt the piston type hydraulic pumps of brace and connecting rod framework
Technical field
The invention belongs to mechanical field, relate to a kind of piston type hydraulic pumps that adopts brace and connecting rod framework.
Background technique
At present, in the Metering Flow Control Circuits Hydraulic Adjustable Speed technology of industrial field extensive use, mainly contain the Metering Flow Control Circuits of metering pump and throttle valve composition and two kinds of the pump speed control systems that driven by variable displacement pump.Powerful, flow and the continuously adjustable oil hydraulic pump of pressure are mainly cam-type axial piston pumps, but the structure of cam-type axial piston pump is very complicated, particularly plunger will bear the moment being formed by radial force, thereby its friction condition is worsened, and working life and mechanical efficiency reduce.In addition, be connected in the piston shoes complex structure of plunger lower end, friction condition is extremely severe, adds complicated flow system etc., makes the manufacturing process of plunger pump extremely complicated.Traditional cam-type axial piston pump also has a critical defect can not be ignored, it is instability of flow, produce so-called pulsation rate, as wish reduces flow pulse rate, not only need to increase the number of plunger, and the number that needs plunger is prime number, for example 3,5,7,11,13,17,19,23 etc.Therefore, the plunger of excessive number is actual is a kind of helpless selection, not only causes mechanism's complexity, and manufacture cost is high.
The hydraulic driving system of hudraulic lift, it is a kind of hydraulic system that typically needs continuous speed adjustment, consider from energy-conservation and operating cost, adopt servo variable displacement axial piston pump contrast of regulating speed ideal, but, price and the higher factor of rate of fault that servo variable displacement axial piston pump is extremely expensive, limited its application at hudraulic lift.
Notice of authorization number is that the Chinese patent of CN 102207066 B also discloses the double-action plunger pump that a kind of symmetrical toggle link drives, but this double-action plunger pump has only represented afterbody mechanical transmission, if the reducing gear of front end and drive motor in increase, will find that the integral layout of this double-action plunger pump is very asymmetric.In addition, the elbow-bar mechanism in this double-action plunger pump is to be hinged on the eccentric pin shaft of gear face, and this bearing pin is overhang, force-bearing situation extreme difference.
Summary of the invention
In order to address the above problem, the invention provides a kind of simple in structure, with low cost, can continuously adjusting flow rate and the piston type hydraulic pumps of the employing brace and connecting rod framework of pressure.
Technological scheme of the present invention is to provide a kind of piston type hydraulic pumps that adopts brace and connecting rod framework, it comprises two plungers, each described plunger is all movably set in a cavity volume, it is characterized in that: also comprise two-piston formula driving mechanism is set along a straight line, one connecting rod connects the piston of driving mechanism described in two, on described connecting rod, be provided with along its length two tooth bars, described in two, tooth bar is separately positioned on the both sides of described connecting rod taking described connecting rod as axle; Two and described tooth bar meshed gears are also set on described lathe, and described gear is symmetricly set on the both sides of described connecting rod taking described connecting rod as symmetry axis; Described plunger is connected to described gear eccentric position place by a toggle, and described toggle and described gear and plunger are all hinged.
Preferably, described piston type driving mechanism is oil cylinder or cylinder.
Preferably, taking described connecting rod as symmetry axis, the bilateral symmetry of described connecting rod is provided with two described plungers, and described in two, plunger is symmetrical arranged taking the axis of described connecting rod as symmetry axis, and two are symmetrical arranged taking the axis of described connecting rod as symmetry axis with described tooth bar meshed gears respectively.
Preferably, the end of described cavity volume is equipped with in-line and oil extraction road; Described in-line communicates with fuel tank by one-way valve, and described oil extraction road joins by one-way valve and external hydraulic system.
Preferably, the outlet of the one-way valve on described oil extraction road communicates with voltage stabilizer, and hydraulic executing system is led in the outlet of voltage stabilizer.
Preferably, on described voltage stabilizer, be connected to digital pressure switch.
The piston type hydraulic pumps of employing brace and connecting rod framework of the present invention has the following advantages:
(1) only adopt Symmetrical rack-gear cylinder, just realized the work of two plunger hydraulic pumps, working efficiency is high, good economy performance.
(2), using cylinder as driving, free from environmental pollution, compared with hydraulic transmission technology, green characteristic is outstanding, meets the development trend of greenization trend.
(3) connecting rod in this device is non-linear mechanism, connecting rod transmission angle and pressure angle large in, be stroke amplifying mechanism, the now exportable low pressure and mass flow liquid of oil hydraulic pump; Transmission angle and pressure angle little in, connecting rod is force amplificatory structure, now the exportable high-pressure low-flow liquid of oil hydraulic pump.
(4) adopt duplex position structure, stress balance, effectively extending structure life-span.
Brief description of the drawings
Fig. 1 is the structural representation that the present invention adopts the piston type hydraulic pumps most preferred embodiment of brace and connecting rod framework.
Embodiment
Below the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, the piston type hydraulic pumps of employing brace and connecting rod framework of the present invention comprises two driving mechanisms 10, and this driving mechanism 10 can be oil cylinder or cylinder, preferentially selects cylinder, reduces the pollution producing because of hydraulic oil.Two driving mechanisms 10 edges are with straight line setting, and a connecting rod 12 connects the piston 14 of two driving mechanisms 10.The two sides tooth bar 16 that is connected on connecting rod 12, both sides respectively arrange one with tooth bar 16 meshed gears 18 and gear 18 '.Certainly, those of ordinary skill in the art can be according to thinking of the present invention, the tooth bar 16 that is easy to expect be connected on connecting rod 12, arrange in the same side of tooth bar 16 several gears 18 and gear 18 '; Or two independent tooth bars 16 are set in connecting rod 12 both sides, along tooth bar 16 directions arrange multiple gears 18 and gear 18 ' etc. mode, equally also can realize the function of oil hydraulic pump.′
The both sides of connecting rod 12 respectively arrange a left plunger 20 and right plunger 20 '.Left plunger 20 and right plunger 20 ' be placed in ordinatedly cavity volume separately; The end of left and right two cavity volumes (being the cavity volume of left plunger 20 and right plunger 20 ' correspondence, lower same) is provided with into oil extraction road (not shown); In-line (not shown) communicates with fuel tank (not shown) by one-way valve (not shown), and oil extraction road (not shown) joins by one-way valve and external hydraulic system (not shown).The outlet of the one-way valve (not shown) on oil extraction road communicates with voltage stabilizer (not shown), and hydraulic executing system (not shown) is led in the outlet of voltage stabilizer; On voltage stabilizer, be connected to digital pressure switch (not shown).Enter the structure that oil extraction road, one-way valve, fuel tank, voltage stabilizer, digital pressure switch and hydraulic executing system are known and extensively adopted for industry, and non-innovative point of the present invention place.
Left plunger 20 and right plunger 20 ' by toggle 22 and toggle 22 ', be hinged on gear 18 and gear 18 ' and the position of gear 18 and gear 18 ' bias on.
Two cylinders 10 drive connecting rod 12 to move up or down ordinatedly, thereby the tooth bar 16 being fixed on connecting rod 12 also can corresponding symmetric motion.
When tooth bar 16 moves downward, can drive two side gears 18 and gear 18 ' and gear 18 and gear 18 ' do respectively clockwise and counterclockwise and move, drive crank-connecting rod 22 and the toggle 22 ' mechanism of both sides, drive left plunger 20 and right plunger 20 ' while symmetric motion to the inside, at this moment, the volume of left and right two cavity volumes expands, form negative pressure, hydraulic oil in fuel tank, under atmospheric effect, is opened one-way valve below, enter respectively left plunger 20 and right plunger 20 ' cavity volume in.
When tooth bar 16 moves upward, can drive two side gears 18 and gear 18 ' and gear 18 and gear 18 ' do respectively counterclockwise and motion clockwise, the crank-connecting rod 22 and the toggle 22 ' mechanism that drive both sides, drive left plunger 20 and right plunger 20 ' while symmetric motion to the inside.At this moment, the volume of the cavity volume of left plunger 20 and right plunger 20 ' correspondence dwindles, and to fluid mineralization pressure, makes to lead to the closed check valve of fuel tank below, and while one-way valve opens above realizes pressure oil output.
Above embodiment is only the present invention's a kind of mode of execution wherein, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (6)

1. one kind adopts the piston type hydraulic pumps of brace and connecting rod framework, it comprises two plungers, each described plunger is all movably set in a cavity volume, it is characterized in that: also comprise two-piston formula driving mechanism is set along a straight line, one connecting rod connects the piston of driving mechanism described in two, on described connecting rod, be provided with along its length two tooth bars, described in two, tooth bar is separately positioned on the both sides of described connecting rod taking described connecting rod as axle; Two and described tooth bar meshed gears are also set on described lathe, and described gear is symmetricly set on the both sides of described connecting rod taking described connecting rod as symmetry axis; Described plunger is connected to described gear eccentric position place by a toggle, and described toggle and described gear and plunger are all hinged.
2. the piston type hydraulic pumps of employing brace and connecting rod framework according to claim 1, is characterized in that: described piston type driving mechanism is oil cylinder or cylinder.
3. the piston type hydraulic pumps of employing brace and connecting rod framework according to claim 2, it is characterized in that: taking described connecting rod as symmetry axis, the bilateral symmetry of described connecting rod is provided with two described plungers, described in two, plunger is symmetrical arranged taking the axis of described connecting rod as symmetry axis, and two are symmetrical arranged taking the axis of described connecting rod as symmetry axis with described tooth bar meshed gears respectively.
4. the piston type hydraulic pumps of employing brace and connecting rod framework according to claim 3, is characterized in that: the end of described cavity volume is equipped with in-line and oil extraction road; Described in-line communicates with fuel tank by one-way valve, and described oil extraction road joins by one-way valve and external hydraulic system.
5. the piston type hydraulic pumps of employing brace and connecting rod framework according to claim 4, is characterized in that: the outlet of the one-way valve on described oil extraction road communicates with voltage stabilizer, and hydraulic executing system is led in the outlet of voltage stabilizer.
6. the piston type hydraulic pumps of employing brace and connecting rod framework according to claim 5, is characterized in that: on described voltage stabilizer, be connected to digital pressure switch.
CN201410202452.8A 2014-05-14 2014-05-14 Piston type hydraulic pump with crank connecting rod structure Expired - Fee Related CN103994042B (en)

Priority Applications (1)

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CN201410202452.8A CN103994042B (en) 2014-05-14 2014-05-14 Piston type hydraulic pump with crank connecting rod structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410202452.8A CN103994042B (en) 2014-05-14 2014-05-14 Piston type hydraulic pump with crank connecting rod structure

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CN103994042A true CN103994042A (en) 2014-08-20
CN103994042B CN103994042B (en) 2017-02-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107327382A (en) * 2016-04-29 2017-11-07 殷图源 A kind of Novel plunger pump
CN108968528A (en) * 2018-08-23 2018-12-11 重庆文理学院 A kind of exhibitions product display rack
CN110067828A (en) * 2019-03-25 2019-07-30 江苏大学 A kind of quasi- zero stiffness vibrating isolation system and vehicle
CN113309755A (en) * 2021-06-21 2021-08-27 浙江大学 Low-speed large-torque combined hydraulic motor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994629A (en) * 1974-11-18 1976-11-30 Tah Sun Lin Mechanism for tapping the surf energy
US5184756A (en) * 1991-07-18 1993-02-09 Talk To Me Products, Inc. Flywheel water gun
WO2009078747A1 (en) * 2007-12-19 2009-06-25 Viacheslav Faizrahmanovich Nurmukhametov Piston machine
US20100275884A1 (en) * 2009-05-01 2010-11-04 Gray Jr Charles L Quasi Free Piston Engine
CN102128157A (en) * 2010-10-11 2011-07-20 李贵祥 Gear rack linkage piston type swinging pump
CN102207066A (en) * 2011-07-04 2011-10-05 苏州大学 Double-acting plunger pump
CN204041368U (en) * 2014-05-14 2014-12-24 苏州农业职业技术学院 Adopt the piston type hydraulic pumps of brace and connecting rod framework

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994629A (en) * 1974-11-18 1976-11-30 Tah Sun Lin Mechanism for tapping the surf energy
US5184756A (en) * 1991-07-18 1993-02-09 Talk To Me Products, Inc. Flywheel water gun
WO2009078747A1 (en) * 2007-12-19 2009-06-25 Viacheslav Faizrahmanovich Nurmukhametov Piston machine
US20100275884A1 (en) * 2009-05-01 2010-11-04 Gray Jr Charles L Quasi Free Piston Engine
CN102128157A (en) * 2010-10-11 2011-07-20 李贵祥 Gear rack linkage piston type swinging pump
CN102207066A (en) * 2011-07-04 2011-10-05 苏州大学 Double-acting plunger pump
CN204041368U (en) * 2014-05-14 2014-12-24 苏州农业职业技术学院 Adopt the piston type hydraulic pumps of brace and connecting rod framework

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107327382A (en) * 2016-04-29 2017-11-07 殷图源 A kind of Novel plunger pump
CN108968528A (en) * 2018-08-23 2018-12-11 重庆文理学院 A kind of exhibitions product display rack
CN110067828A (en) * 2019-03-25 2019-07-30 江苏大学 A kind of quasi- zero stiffness vibrating isolation system and vehicle
CN113309755A (en) * 2021-06-21 2021-08-27 浙江大学 Low-speed large-torque combined hydraulic motor
CN113309755B (en) * 2021-06-21 2022-03-25 浙江大学 Low-speed large-torque combined hydraulic motor

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