CN101122324B - Multiple pivot crank device with combined type eccentric shaft structure crankshaft - Google Patents
Multiple pivot crank device with combined type eccentric shaft structure crankshaft Download PDFInfo
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- CN101122324B CN101122324B CN2007101320350A CN200710132035A CN101122324B CN 101122324 B CN101122324 B CN 101122324B CN 2007101320350 A CN2007101320350 A CN 2007101320350A CN 200710132035 A CN200710132035 A CN 200710132035A CN 101122324 B CN101122324 B CN 101122324B
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- bent axle
- eccentric
- connecting rod
- crank mechanism
- supports
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Abstract
The invention relates to a multi-support point crank mechanism, a crankshaft of which is a combined crank pin structure, and belongs to the mechanical transmission technical field. The mechanism comprises a mechanism body. The mechanism body is equipped with at least three siamesed supports escaping the position of connecting rod, and the siamesed supports are equipped with concentric through-holes. Each through-hole supports a coaxial rotating crankshaft section respectively. Opposite ends of two neighboring crankshaft sections support corresponding eccentric wheels from two ends respectively, and form the circumferential restriction. An external circle of the eccentric wheel and an internal hole of a large end of the connecting rod form a revolute pair. The prominent advantage of the invention is that the rigidity and intensity are greatly increased, which is favorable for bearing a big bending moment; manufacture of parts is quite simple; the thermal processing quality can be easily controlled; the invention is easy for installation and disassembly; a rolling bearing is allowed in the position of the revolute pair so as to promote the transmission performance of the crank mechanism.
Description
Technical field
The present invention relates to a kind of crank mechanism of bent axle transmission, especially a kind of architecture advances that realizes rotating between prime mover and the actuator bent axle driving crank mechanism that transforms mutually with straight reciprocating motion belongs to the mechanical transmissioning technology field.
Background technique
The typical structure of common crank mechanism mainly is made of bent axle, connecting rod and slide block (crosshead or piston) as shown in Figure 1.In crank mechanism, the effect of bent axle (or claim crankshaft, crank shaft) is that the conversion of motion with prime mover becomes one of vitals of the required forms of motion of actuator.During work, bent axle bears periodically alternate load.Traditional crank mechanism has two quasi-representative structures: 1. take solid forging (casting) when making when bent axle, as shown in Figure 2, the supporting axle position of the cranking arm of bent axle, crank pin and bent axle is an integral body.Be subjected to structural limitations, connecting rod tip must adopt the middle open type structure in this mechanism, be that connecting rod tip is made up of connecting rod cap, connecting rod shank, and link into an integrated entity with two connecting-rod bolts, connecting rod tip and crank are connected and can only adopt split bushing supporting (referring to Fig. 4), thereby the relative movement of connecting rod and crank pin can only be to slide, so the lubricating requirement of kinematic pair is higher.In entire mechanism, need independently lubrication system that it is carried out pressure lubrication sometimes, and the connecting rod manufacturing process complexity of split type structure, simultaneously because the split type structure of connecting rod tip makes the integral rigidity of connecting rod be affected.For many crank throws (crank mechanism of multi-joint forms of motion) integral one-piece crankshaft, manufacturing process such as the processing of its crank pin, heat treatment, grinding are more complicated.Because structural limitations, bent axle can only be supported by bearings at both ends, makes that the bearing stride of bent axle is big, easily produces deflection deformation, is unfavorable for bearing bigger moment of flexure (i.e. the piston force that is directly transmitted by connecting rod).2. when bent axle in the system adopts eccentric shaft structure (referring to Fig. 3), though can avoid unfavorable factor to a certain extent because of the crank pin processing difficulties of crank shaft, and connecting rod tip needn't adopt middle open type when crank pin is reduced to eccentric wheel structure, the bearing of rolling bearing as connecting rod tip promptly is installed on eccentric wheel disc, can simplify the technological requirement of the processing and the assembling of connecting rod like this, but for the crank mechanism of multi-joint forms of motion, because structural limitations, bent axle as eccentric shaft structure in the crank mechanism can only adopt the big bearings at both ends supporting of span, exist system rigidity poor equally, the drawback that is unfavorable for bearing bigger moment of flexure (piston force).
Retrieval finds, application number is that 03136914.6 Chinese patent application discloses the bent axle that is used for large-sized two-stroke cross-head internal combustion engine, comprises many crank throws.Each crank throw all is made up of two crankwebs that linked together by crank pin.Crank throw is intactly interconnected by many main journals.Application number is that 02294651.9 Chinese patent application has openly been opened segmentation eccentric shaft type plunger pump bent axle, parallel equidistant eccentric bushing and several band gear eccentric bushing that is crisscross arranged in cylinder body, main shaft runs through the endoporus of eccentric bushing and band gear eccentric bushing, eccentric bushing and band gear eccentric bushing parallel equidistant are crisscross arranged on main shaft, with flat key fixedly eccentric bushing and band gear eccentric bushing, an end of main shaft fixedly installs main shaft bearing.In addition, application number is the detachable combined crank that 200510023854.2 Chinese patent application discloses a kind of field of textile machinery, it is characterized in that it comprises L type fluting crankshaft section with holes, socket head screw and Z type crankshaft section.
Above patent application has been carried out useful improvement to the bent axle of traditional crank mechanism respectively, but all can only not adopt the drawback of the big bearings at both ends supporting of span at bent axle, therefore still has the problem that system rigidity is poor, be unfavorable for bearing big moment of flexure.
Summary of the invention
The present invention wants the technical solution problem to be: at drawback or problem that above prior art exists, proposing a kind of bent axle is many fulcrums crank mechanism of combined type eccentric shaft structure, thereby obtains the ideal system rigidity, can bear big moment of flexure.
In order to solve above technical problem, bent axle of the present invention is that many fulcrums crank mechanism of combined type eccentric shaft structure comprises body, being shaped on the disjunctor that at least three places get out of the way connecting rod position on the described body supports, described disjunctor supports and is shaped on concentric pylone, support the coaxial bent axle of rotatable segmentation in described each through hole respectively, the opposite end of described adjacent sectional bent axle is respectively from the eccentric wheel of two end supports correspondence, and forms circumferentially constraint, described eccentric cylindrical and connecting rod tip endoporus formation revolute pair.
Two kinds of typical perfect frames:
1, supports the hollow coaxial bent axle of rotatable segmentation respectively in each through hole that described disjunctor supports, support the extended wheel shaft in corresponding eccentric wheel two ends in the relative opening of the coaxial bent axle of described adjacent sectional respectively, and form circumferentially constraint.
2, support the coaxial bent axle of rotatable segmentation respectively in each through hole that described disjunctor supports, the cylindrical of the coaxial bent axle of described adjacent sectional supports the extended wheel shaft endoporus in corresponding eccentric wheel two ends respectively, and forms circumferentially constraint.
Outstanding advantage of the present invention is as follows:
1, because bent axle by multi-point support, is therefore compared with the two-end-point supporting structure of the big span of tradition, rigidity and intensity strengthen greatly, help bearing bigger moment of flexure.
2, the manufacturing of each component is very simple, and thermal treatment quality is controlled easily, has abandoned the complicated processing technology of traditional integral formula bent axle.
3, easy disassembling allows to rotate vice division chief and adopts rolling bearing, and is lubricated convenient, helps improving the transmission performance of crank mechanism.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1: existing typical crankshaft driving crank linkage mechanism structural representation.
Fig. 2: the schematic representation of existing crank pin structure bent axle.
Fig. 3: the schematic representation of existing eccentric shaft structure bent axle.
Fig. 4: the schematic representation of existing middle open type connecting rod tip structure.
Fig. 5: the structural representation of the preferred embodiment of the present invention.
Fig. 6: the application structure schematic representation of the preferred embodiment of the present invention.
The sectional view of Fig. 7: Fig. 6.
Embodiment
Embodiment one
The bent axle of present embodiment be combined type eccentric shaft structure many fulcrums crank mechanism as shown in Figure 5, be a kind of electric reciprocating plunger pump, specifically be the horizontal single-acting reciprocating pumps of a kind of three cylinder horizontal arrangement, its main structure is by being made up of power end and fluid end two-part, as Fig. 6, shown in Figure 7.The main member of power end has: eccentric shaft structure multi-point support assembled crankshaft assembly 02, connecting rod 04, crosshead 14 and be contained in crank bore and the eccentric wheel cylindrical between selfaligning roller bearing 05.Wrist-pin end of connecting rod is hinged with crosshead 14 by the crosshead bearing pin 16 that selfaligning roller bearing 17 is housed; Be subjected to the constraint of body crosshead slideway with the hinged crosshead 14 of connecting rod 05.The segmentation bent axle 09,11,13 of crankshaft group (referring to Fig. 5) is bearing on the disjunctor supporting structure of body 02 by two groups of axle head selfaligning roller bearings 06 and two groups of middle selfaligning roller bearings 03 respectively.The control of the axial assemblage gap of whole crankshaft group is realized by the adjustment of the axial dimension of end cap 08, tail-hood 01 and bearing housing 07.The motive force of pump is motor, motor via reducer and pump direct connection.Each eccentric shaft 12 is shaped on the center oilhole, the wheel shaft length that stretch out at two ends is less than 1/2nd of segmentation bent axle 11 length in the middle of being positioned at, therefore after inserting the center hole of segmentation bent axle by two ends, opposing end surface forms in central hole of the crankshaft at interval, is convenient to take the assembly technology measure like this.
During pump work: motor via reducer drives bent axle, and under the constraint of selfaligning roller bearing on the axle, bent axle is around self axis rotation; Circumferential constraint by key 10 connects, and the eccentric shaft on the eccentric shaft is with crankshaft rotating, and under the constraint of eccentric segment cylindrical on the eccentric shaft, connecting rod tip is that radius is made circular movement around the axis of crankshaft group with the centripetal moment with the eccentric segment center of circle; Transmit motion on the crosshead hinged with it by connecting rod shank, wrist-pin end of connecting rod, under the constraint of pump housing slideway, crosshead is done straight reciprocating motion along the slideway center line; Under the driving of crosshead, it is reciprocating together that pump plunger is followed crosshead; Along with the to-and-fro motion of plunger makes the plunger cavity of pump hydraulic end produce periodic volume-variation, be transferred medium along with plunger cavity periodicity volume-variation, finish sucking the process of discharging under the control of fluid end valve assembly, pump has just formed the work cycle of going round and beginning again.
Working procedure is: when the motion of actuator devices is to-and-fro motion: the rotation of prime mover is imported into by bent axle spindle nose section 09, drives eccentric shafts 12, bent axle intermediate section 11 and bent axle latter end 13 together around the rotational of crankshaft support section by key 10; Under the eccentric wheel effect of eccentric shaft 12, connecting rod tip 04 is with the eccentric center of circle, with the centripetal moment is that radius is made circular movement around crankshaft support section axis, meanwhile, under the restriction of the cylinder slideway of body 02, with the hinged crosshead 14 of wrist-pin end of connecting rod 15 along with crosshead pin 16 is done straight reciprocating motion.In order to transmit than high pulling torque and to be convenient to assemble time location, the keyway angular position on each eccentric shaft respectively with the consistent (not shown) of angular position of its throw of eccentric.When the motion of actuator devices when rotatablely moving, the movement process of crank mechanism opposite with said process (referring to Fig. 6, Fig. 7).
The present invention program's bent axle is easy to realize multi-point support in the crank mechanism of multi-joint forms of motion, compare with traditional integral formula bent axle, the bent axle of conventional construction is because of the restriction of structural condition, can only adopt the two-end-point supporting of big span, cause former train of mechanism rigidity relatively poor, and the present invention program's multi-point support structure makes the force-bearing situation of crank can be reduced to simply supported beam between any 2 supportings, and the rigidity and the intensity of bent axle are increased, and help bearing bigger moment of flexure (piston force).
The present invention program simplifies and has optimized the processing technology of bent axle in the crank mechanism of multi-joint forms of motion.Compare with traditional integral formula bent axle, former workpiece is had relatively high expectations because of its casting of profile or the Forging Technology of blank complexity, and casting of the present invention program's blank or Forging Technology want much simple; Aspect mechanical processing technique, because its overall structure workpiece is complex-shaped, the tolerance of size of workpiece and the required precision of form and position tolerance be difficult to guarantee, and the present invention program is because of resolving into original structure the combination of several simple geometry bodies, and its tolerance of size and form and position tolerance then are easy to be controlled; Aspect heat treatment process, because giving, its complicated geometrical shape of integrally-built bent axle wants to have brought difficulty by obtaining comprehensive physical property and mechanical property with local processing method, the present invention program is then much easier.
Connecting rod tip 04 adopts overall structure to replace the middle open type structure among the present invention program, itself and the supporting form of eccentric shaft 12 sliding bearing with split type structure in the selfaligning roller bearing 05 replacement original structure.Conclusion is got up, and present embodiment has following characteristics:
1, the structure of integrated type connecting rod tip makes the intensity of con-rod only and rigidity increase.
2, the structure of integrated type connecting rod tip makes the machining work process of connecting rod workpiece compare with the machining work process of the connecting rod workpiece of middle open type connecting rod tip structure and wants much simple.
3, the structure of integrated type connecting rod tip makes the connecting rod workpiece obtain higher dimensional accuracy and form and position tolerance precision easily in process for machining.
4, the structure of integrated type connecting rod tip in assembling because itself and the supporting form of eccentric shaft employing selfaligning roller bearing; The supporting form of wrist-pin end of connecting rod and crosshead pin adopts selfaligning roller bearing, this assembly structure can be eliminated when assembling and the contact stress that produces in the motion to greatest extent, to guarantee mechanism's smoothness of moving at work, make mechanism obtain higher mechanical efficiency at work.
5, the structure of integrated type connecting rod tip is because the motion mode of its kinematic pair adopts in the present invention program is rolling friction, the lubricating condition of its kinematic pair requires to compare with the lubricating condition requirement of sliding friction much simple, only need adopt splash lubrication to annotate the lubricating requirement that lubricating grease just can satisfy motion with giving to kinematic pair at the volley.
In addition to the implementation, the present invention can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (7)
1. many fulcrums crank mechanism that bent axle is a combined type eccentric shaft structure, comprise body, it is characterized in that: be shaped on the disjunctor support that at least three places get out of the way connecting rod position on the described body, described disjunctor supports and is shaped on concentric pylone, support the coaxial bent axle of rotatable segmentation in described each through hole respectively, the opposite end of described adjacent sectional bent axle is respectively from the eccentric wheel of two end supports correspondence, and forms circumferentially constraint, described eccentric cylindrical and connecting rod tip endoporus formation revolute pair.
2. many fulcrums crank mechanism according to claim 1 is characterized in that: the coaxial bent axle of described segmentation is a hollow shaft, supports the extended wheel shaft in corresponding eccentric wheel two ends in the relative opening of the coaxial bent axle of described adjacent sectional respectively, and forms circumferentially constraint.
3. many fulcrums crank mechanism according to claim 1 is characterized in that: the cylindrical of the coaxial bent axle of described adjacent sectional supports the extended wheel shaft endoporus in corresponding eccentric wheel two ends respectively, and forms circumferentially constraint.
4. many fulcrums crank mechanism according to claim 2, it is characterized in that: described eccentric wheel shaft is shaped on the center oilhole, and the wheel shaft length is less than 1/2nd of segmentation crankshaft length, after described adjacent wheel shaft inserted the center hole of segmentation bent axle by two ends, opposing end surface formed in central hole of the crankshaft at interval.
5. according to claim 2 or 3 described many fulcrums crank mechanisms, it is characterized in that: the keyway angular position on the described eccentric shaft is consistent with the angular position of its throw of eccentric.
6. many fulcrums crank mechanism according to claim 5 is characterized in that: between described crank bore and the eccentric wheel cylindrical selfaligning roller bearing is housed.
7. many fulcrums crank mechanism according to claim 6 is characterized in that: described segmentation bent axle is supported by the disjunctor that selfaligning roller bearing is bearing in body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101320350A CN101122324B (en) | 2007-09-10 | 2007-09-10 | Multiple pivot crank device with combined type eccentric shaft structure crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101320350A CN101122324B (en) | 2007-09-10 | 2007-09-10 | Multiple pivot crank device with combined type eccentric shaft structure crankshaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101122324A CN101122324A (en) | 2008-02-13 |
| CN101122324B true CN101122324B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101320350A Expired - Fee Related CN101122324B (en) | 2007-09-10 | 2007-09-10 | Multiple pivot crank device with combined type eccentric shaft structure crankshaft |
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| CN (1) | CN101122324B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321768A (en) * | 2015-06-24 | 2017-01-11 | 葛稳生 | Eccentric gear shaft connection rod slide block device |
| CN105822517B (en) * | 2016-05-18 | 2018-11-20 | 甘肃天恩重工科技有限公司 | The opposed single-acting high-pressure plunger pump of six cylinders |
| CN106594211A (en) * | 2016-12-29 | 2017-04-26 | 江苏科选环境科技有限公司 | Crankshaft transmission mechanism of multiple eccentric disc sets |
| CN107143484B (en) * | 2017-04-12 | 2020-01-24 | 中清能（北京）科技有限公司 | Piston air compressor and automobile-used air compressor |
| CN106979222A (en) * | 2017-05-08 | 2017-07-25 | 青岛港国际股份有限公司 | A kind of eccentric adjuster being used between articulated elements |
| CN112682676A (en) * | 2020-12-30 | 2021-04-20 | 上海核工程研究设计院有限公司 | Integrated supporting assembly and transverse supporting structure for nuclear power steam generator |
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| US5101683A (en) * | 1990-02-26 | 1992-04-07 | Fag Kugelfischer Georg Schafer | Crankshaft with connecting rod support |
| US5195420A (en) * | 1991-03-12 | 1993-03-23 | Fritz Haug Ag | Piston compressor, particularly an oil-free piston compressor |
| EP0739696A1 (en) * | 1995-04-24 | 1996-10-30 | AVE Umwelttechnik GmbH | Gang saw with plural gang saw frames |
| CN2361871Y (en) * | 1999-02-09 | 2000-02-02 | 赖邦钧 | Roller plunger pump |
| CN2367836Y (en) * | 1998-11-06 | 2000-03-08 | 廊坊市巨牛车用空压机厂 | Crank-linklever mechanism |
| CN1460800A (en) * | 2002-05-21 | 2003-12-10 | 曼B与W狄赛尔公司 | Crankshaft for large crosshead two-stroke internal combustion engine |
| CN2591267Y (en) * | 2002-12-30 | 2003-12-10 | 天津市聚能高压泵厂 | Sectional eccentric shaft type plunger piston pump crankshaft |
| CN1648477A (en) * | 2005-02-05 | 2005-08-03 | 东华大学 | Detachable combined crank |
| CN201078449Y (en) * | 2007-09-10 | 2008-06-25 | 江苏双达隔膜泵制造有限公司 | Multi-fulcrum crank mechanism with crankshaft of combined eccentric centre wheel axis structure |
-
2007
- 2007-09-10 CN CN2007101320350A patent/CN101122324B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101683A (en) * | 1990-02-26 | 1992-04-07 | Fag Kugelfischer Georg Schafer | Crankshaft with connecting rod support |
| US5195420A (en) * | 1991-03-12 | 1993-03-23 | Fritz Haug Ag | Piston compressor, particularly an oil-free piston compressor |
| EP0739696A1 (en) * | 1995-04-24 | 1996-10-30 | AVE Umwelttechnik GmbH | Gang saw with plural gang saw frames |
| CN2367836Y (en) * | 1998-11-06 | 2000-03-08 | 廊坊市巨牛车用空压机厂 | Crank-linklever mechanism |
| CN2361871Y (en) * | 1999-02-09 | 2000-02-02 | 赖邦钧 | Roller plunger pump |
| CN1460800A (en) * | 2002-05-21 | 2003-12-10 | 曼B与W狄赛尔公司 | Crankshaft for large crosshead two-stroke internal combustion engine |
| CN2591267Y (en) * | 2002-12-30 | 2003-12-10 | 天津市聚能高压泵厂 | Sectional eccentric shaft type plunger piston pump crankshaft |
| CN1648477A (en) * | 2005-02-05 | 2005-08-03 | 东华大学 | Detachable combined crank |
| CN201078449Y (en) * | 2007-09-10 | 2008-06-25 | 江苏双达隔膜泵制造有限公司 | Multi-fulcrum crank mechanism with crankshaft of combined eccentric centre wheel axis structure |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-332620A 2004.11.25 |
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| CN101122324A (en) | 2008-02-13 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Shuangda Pump & Valve Co., Ltd. Assignor: Jiangsu Shuangda Membrane Pump Manufacture Co., Ltd.|Chen Gensheng Contract fulfillment period: 2009.5.14 to 2017.5.14 Contract record no.: 2009320000924 Denomination of invention: Multiple pivot crank device with combined type eccentric shaft structure crankshaft License type: Exclusive license Record date: 2009.5.14 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.14 TO 2017.5.14; CHANGE OF CONTRACT Name of requester: JIANGSU SHUANGDA VALVE GROUP CO.,LTD. Effective date: 20090514 |
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Effective date of registration: 20170120 Address after: Mizue Road New Park 214537 Jiangsu province Jingjiang City Economic Development Zone No. 1 Patentee after: Jiangsu Shuangda Pump & Valve Co., Ltd. Address before: The new town Jingjiang city Jiangsu province 214537 Newbridge Road No. 159 Patentee before: Jiangsu Shuangda Membrane Pump Manufacture Co., Ltd. Patentee before: Chen Gensheng |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100609 Termination date: 20180910 |