CN103994043A - Transmission type hydraulic pump with crank connecting rod structure - Google Patents
Transmission type hydraulic pump with crank connecting rod structure Download PDFInfo
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- CN103994043A CN103994043A CN201410202339.XA CN201410202339A CN103994043A CN 103994043 A CN103994043 A CN 103994043A CN 201410202339 A CN201410202339 A CN 201410202339A CN 103994043 A CN103994043 A CN 103994043A
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- transmission type
- connecting rod
- type hydraulic
- leading screw
- plunger
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Abstract
The invention discloses a transmission type hydraulic pump with a crank connecting rod structure. The transmission type hydraulic pump comprises at least one plunger piston which is movably arranged in a containing cavity. The transmission type hydraulic pump is characterized by further comprising a motor, an output shaft of the motor is coaxially connected with a lead screw, the lead screw is in threaded connection with a nut in a sleeved mode, at least one rack is fixedly connected to the nut in the length direction of the lead screw, a machine tool is provided with at least one gear meshed with the rack, the plunger piston is connected to the eccentric position of the gear through a hinged rod, and the hinged rod is hinged to the gear and the plunger piston. The transmission type hydraulic pump with the crank connecting rod structure has the advantages of being simple in structure, low in cost and capable of continuously adjusting flow and pressure.
Description
Technical field
The invention belongs to mechanical field, relate to a kind of transmission type hydraulic press pump 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 two kinds of the Metering Flow Control Circuits that metering pump and throttle valve form and the pump speed control system being 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 cause mechanism complicated, 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, from energy-conservation and operating cost, consider, adopt servo variable displacement axial piston pump contrast of regulating speed desirable, 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.
The notice of authorization number double-action plunger pump that a kind of symmetrical toggle link drives for the Chinese patent of CN 102207066 B also discloses, 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 transmission type hydraulic press pump of the employing brace and connecting rod framework of pressure.
Technological scheme of the present invention is to provide a kind of transmission type hydraulic press pump that adopts brace and connecting rod framework, it comprises two plungers, described in each, plunger is all movably set in a cavity volume, it is characterized in that: also comprise a motor, the coaxial leading screw that connects of output shaft of described motor, on described leading screw, screw thread is socketed a nut, on described nut along described leading screw length direction two tooth bars that are connected, described in two, tooth bar be take described leading screw as axle is separately positioned on the both sides of described nut, on described lathe, also arrange two respectively with tooth bar meshed gears described in; Described plunger is connected to described gear eccentric position place by a toggle, and described toggle and described gear and plunger are all hinged, and described in two, plunger be take the axis of described leading screw and is symmetrical arranged as symmetry axis.
Preferably, described motor is actuating motor.
Preferably, described leading screw is ball screw, between described nut and described leading screw, is provided with ball, is provided with the spirality raceway rolling for described ball on described leading screw.
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 transmission type hydraulic press pump of employing brace and connecting rod framework of the present invention has the following advantages:
(1) technical functionality is comparatively perfect, adopts the screw-nut body, pinion and rack, toggle mechanism of technology maturation as the primary component of stamping press, and manufacturing is got up more for convenience.
(2) motor-guilde screw drive technology have that stable working, transmission efficiency are high, High power output, the advantage such as pollution-free, the present invention adopts motor-guilde screw drive technology to drive, replace easily producing hydraulic transmission technology and the less Pneumatic Transmission technology of ouput force of polluting, meet trend and the trend of greenization future development.
(3) only adopt a set of motor-guilde screw transmission device, just realized the work of two plunger pumps, structure is compacter, has improved working efficiency, has reduced cost.
(4) connecting rod in this device is non-linear mechanism, connecting rod transmission angle and pressure angle large in, be stroke amplifying mechanism, the exportable low pressure and mass flow liquid of oil hydraulic pump now; 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.。
(5) adopt duplex position structure, stress balance, effectively extending structure life-span.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention adopts the transmission type hydraulic press pump 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 transmission type hydraulic press pump of employing brace and connecting rod framework of the present invention comprises motor 10.The output shaft fixed connection of motor 10 has a leading screw 12, is provided with ordinatedly a nut 14 on leading screw 12.The two sides tooth bar 16 that is connected on nut 14, both sides respectively arrange one with tooth bar 16 meshed gears 18 and gear 18 '.Certainly, those of ordinary skills can be according to thinking of the present invention, the tooth bar 16 that is easy to expect be connected on nut 14, in the same side of tooth bar 16, arrange several gears 18 and gear 18 '; Or two independent tooth bars 16 are set in nut 14 both sides, along tooth bar 16 directions arrange a plurality of gears 18 and gear 18 ' etc. mode, equally also can realize the function of oil hydraulic pump.′
The both sides of leading screw 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 on oil extraction road (not shown) 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).Entering oil extraction road, one-way valve, fuel tank, voltage stabilizer, digital pressure switch and hydraulic executing system is the structure that industry is known and extensively adopted, 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.
Motor 10 drives leading screw 12 rotations, and therefore the nut 14 being arranged on to screw-thread fit on leading screw 12 moves up or down, thereby the tooth bar 16 being fixed on nut 14 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 motion counterclockwise, 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.
Further, leading screw 12 is ball screw, between nut 14 and leading screw 12, is provided with ball 24.
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. a transmission type hydraulic press pump that adopts brace and connecting rod framework, it comprises two plungers, described in each, plunger is all movably set in a cavity volume, it is characterized in that: also comprise a motor, the coaxial leading screw that connects of output shaft of described motor, on described leading screw, screw thread is socketed a nut, on described nut along described leading screw length direction two tooth bars that are connected, described in two, tooth bar be take described leading screw as axle is separately positioned on the both sides of described nut, on described lathe, also arrange two respectively with tooth bar meshed gears described in; Described plunger is connected to described gear eccentric position place by a toggle, and described toggle and described gear and plunger are all hinged, and described in two, plunger be take the axis of described leading screw and is symmetrical arranged as symmetry axis.
2. the transmission type hydraulic press pump of employing brace and connecting rod framework according to claim 1, is characterized in that: described motor is actuating motor.
3. the transmission type hydraulic press pump of employing brace and connecting rod framework according to claim 2, it is characterized in that: described leading screw is ball screw, between described nut and described leading screw, be provided with ball, on described leading screw, be provided with the spirality raceway rolling for described ball.
4. the transmission type hydraulic press pump 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 transmission type hydraulic press pump 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 transmission type hydraulic press pump 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202339.XA CN103994043A (en) | 2014-05-14 | 2014-05-14 | Transmission type hydraulic pump with crank connecting rod structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202339.XA CN103994043A (en) | 2014-05-14 | 2014-05-14 | Transmission type hydraulic pump with crank connecting rod structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994043A true CN103994043A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202339.XA Pending CN103994043A (en) | 2014-05-14 | 2014-05-14 | Transmission type hydraulic pump with crank connecting rod structure |
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| Country | Link |
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| CN (1) | CN103994043A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209781A (en) * | 2014-09-23 | 2014-12-17 | 苏州农业职业技术学院 | Automatic centering and clamping device based on transmission of worm and worm gears and crank connecting rods |
| CN110722483A (en) * | 2019-11-22 | 2020-01-24 | 国唐汽车有限公司 | Door plate positioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056667A (en) * | 2001-08-08 | 2003-02-26 | Ntn Corp | Feed screw for syringe pump, and syringe pump |
| JP3566667B2 (en) * | 2001-04-16 | 2004-09-15 | 株式会社東芝 | Waste pyrolysis plant |
| US20040265155A1 (en) * | 2003-06-25 | 2004-12-30 | Hunter Timothy H. | Transmissionless variable output pumping unit |
| CN101672260A (en) * | 2009-09-23 | 2010-03-17 | 西南石油大学 | Linear motor multi-cylinder reciprocating pump with coupled gear and rack |
| CN103498898A (en) * | 2013-10-18 | 2014-01-08 | 苏州大学 | Electric bionic double-hand rubbing device |
| CN204041377U (en) * | 2014-05-14 | 2014-12-24 | 苏州农业职业技术学院 | Adopt the transmission type hydraulic press pump of brace and connecting rod framework |
-
2014
- 2014-05-14 CN CN201410202339.XA patent/CN103994043A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3566667B2 (en) * | 2001-04-16 | 2004-09-15 | 株式会社東芝 | Waste pyrolysis plant |
| JP2003056667A (en) * | 2001-08-08 | 2003-02-26 | Ntn Corp | Feed screw for syringe pump, and syringe pump |
| US20040265155A1 (en) * | 2003-06-25 | 2004-12-30 | Hunter Timothy H. | Transmissionless variable output pumping unit |
| CN101672260A (en) * | 2009-09-23 | 2010-03-17 | 西南石油大学 | Linear motor multi-cylinder reciprocating pump with coupled gear and rack |
| CN103498898A (en) * | 2013-10-18 | 2014-01-08 | 苏州大学 | Electric bionic double-hand rubbing device |
| CN204041377U (en) * | 2014-05-14 | 2014-12-24 | 苏州农业职业技术学院 | Adopt the transmission type hydraulic press pump of brace and connecting rod framework |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209781A (en) * | 2014-09-23 | 2014-12-17 | 苏州农业职业技术学院 | Automatic centering and clamping device based on transmission of worm and worm gears and crank connecting rods |
| CN110722483A (en) * | 2019-11-22 | 2020-01-24 | 国唐汽车有限公司 | Door plate positioner |
| CN110722483B (en) * | 2019-11-22 | 2021-04-27 | 国唐汽车有限公司 | Door plate positioner |
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Application publication date: 20140820 |
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| RJ01 | Rejection of invention patent application after publication |