CN102828895B - Radial support axle valve flow distribution cycloid hydraulic motor - Google Patents
Radial support axle valve flow distribution cycloid hydraulic motor Download PDFInfo
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- CN102828895B CN102828895B CN201210329200.2A CN201210329200A CN102828895B CN 102828895 B CN102828895 B CN 102828895B CN 201210329200 A CN201210329200 A CN 201210329200A CN 102828895 B CN102828895 B CN 102828895B
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Abstract
The present invention relates to a kind of radial support axle valve flow distribution cycloid hydraulic motor, belong to hydraulic transmission technology field.Cycloid hydraulic motor Coefficient of discharge of the present invention and discharge capacity all medium-sized bigger than normal, one end is the body shell being shaped with liquid entering hole and refluxing opening, the other end be primarily of stators and rotators form cycloidal pin wheel set, the moment of torsion output of described output shaft and assignment unit are divided into overall structure, two the single-groove grooved ball bearings bearing radial force bearing are installed in the front end of described output shaft, or selfaligning ball bearing, before and after the flow-distribution mechanism circular groove of output shaft, two-part at least have a tiny annular groove, bearing outer ring one end is resisted against on protecgulum, the other end is resisted against on the step hole of housing, therefore, motor can bear large radial force, also can bear certain axial force simultaneously, therefore improve oil hydraulic motor adaptation condition, manufacture easy to assembly, discharge mechanism can be saved, reduce costs.
Description
Technical field
The present invention relates to and a kind ofly realize by cycloidal pin wheels engagement pair the cycloid hydraulic motor that hydraulic energy changes to mechanical energy, especially a kind of there are two bearings bear radial mechanical axis valve flow distribution cycloid hydraulic motor, belong to hydraulic transmission technology field.
Background technique
Cycloid hydraulic motor is conventional fluid pressure drive device, is also to realize the conventional hydraulic pressure execution device that hydraulic energy converts function to.Cycloid hydraulic motor has the advantages such as volume is little, specific power density is large, efficiency is high, speed range is wide, is thus widely applied.
The basic structure of such device is that body shell or bonnet are shaped with liquid entering hole and refluxing opening, cycloidal pinion engaged pair and flow-distribution mechanism are equipped with in one end, before or after flow-distribution mechanism can be placed on cycloidal pinion engaged pair, general is axle Flat valve in front (body shell side), be plane flow in rear (bonnet side), the other end is equipped with output shaft.The rotor of cycloidal pinion engaged pair is engaged by the external gear of internal spline with couple axle one end, and the other end of couple axle is connected with output shaft transmission.During work, flow-distribution mechanism makes liquid entering hole engage chamber with the expansion of cycloidal pin wheel set to be communicated with, and the contraction chamber of cycloidal pin wheel set is communicated with refluxing opening.As a result, after pressured fluid enters body shell or bonnet from liquid entering hole, enter the expansion engagement chamber that cycloidal pinion engaged pair is formed, its volume is constantly expanded, the contraction that cycloidal pinion engaged pair is formed simultaneously is engaged liquid in chamber and is then refluxed from refluxing opening; In the process, the rotor of cycloidal pinion engaged pair is expanded engagement chamber and shrinks the pressure difference engaging chamber and orders about rotation, and this is rotated through couple axle and be delivered to output shaft output, thus realizes the conversion of hydraulic energy to mechanical energy.Meanwhile, flow-distribution mechanism (axle valve) is also by couple axle driven rotary, and the continuous switching connected state gone round and begun again, makes transfer process be continued.Like this, motor just can continuous print output torque.
According to the applicant understood, the conventional construction that the diameter of axle is separated with the flow diameter of axle installed by the bearing of structure described in existing CN200820035921.1, the independently highi degree of accuracy processing dimension that its separation structure can solve the flow diameter of axle and the bearing installation diameter of axle requires and status requirement, rely on the structure of locating stud to solve the high-precision requirement of the flow diameter of axle and the assembling of the bearing installation diameter of axle, but the processing of locating stud and assembly precision can affect flow precision problem again conversely.
There is the cycloid hydraulic motor using scope more and more extensive (as BM2, BM3 product that claimant produces) at home of the axle Flat valve that bearing structure supports, the operating mode of application is also more and more extensive, the requirement used is also more and more higher, the motor that market demand is more superior.Along with the raising of process equipment precision, again can innovate existing motor configuration, improve the flow precision of motor further.
Summary of the invention
The object of the invention is to: for above prior art Problems existing, propose a kind of compact structure and the axle valve flow distribution cycloid hydraulic motor of large radial force can be born, and reduce the axle of axle Flat valve motor and the complex structure degree in hole, make the processing of oil hydraulic motor, assembling manufacturability all good, improve its cost performance.
In order to achieve the above object, claimant is by the structural analysis to discharge capacity 160-630 milliliter/turn medium-sized discharge capacity cycloid hydraulic motor bigger than normal, especially there is the research of axle Flat valve structure cycloid tooth wheel set oil hydraulic motor integral structure layout, find out the weak link that it bears radial force, keeping existing overall motor (as the BM2 that claimant produces, BM3) under the prerequisite that profile installation dimension is constant, proposing following technological scheme of the present invention is: a kind of axle valve flow distribution cycloid hydraulic motor, one end is the body shell being shaped with liquid entering hole and refluxing opening, the other end is the cycloidal pin wheel set formed primarily of stators and rotators, the output shaft that outer end extends out is equipped with in described body shell one end, and the couple axle that two ends are engaged with described output shaft the inner and rotor internal spline is respectively equipped with at middle part, its improvements are: the front end of described output shaft is installed and born radial force bearing, described bearing is two single-groove grooved ball bearings, bearing outer ring one end is resisted against on protecgulum, the other end is resisted against on the step hole of body shell, bearing inner race one end is resisted against on the output shaft shaft shoulder, and the other end is fixed by shaft block ring.
Described bearing outer ring adopts a kind of more loose coordinating with the mounting hole of body shell, and described cooperation adopts transition fit, from magnitude of interference 0.01mm to gap 0.015mm.
The flow diameter of axle that the bearing of described output shaft installs one end and output shaft is integrated, and the matching gap in the diameter of axle of output shaft and the aperture of body shell controls at 0.012mm ~ 0.026mm.
Above technological scheme is further improved: before and after the flow-distribution mechanism circular groove of output shaft, two-part at least have a tiny annular groove.
Above technological scheme is further improved: described protecgulum is step-like, the interior step of bearing abutment facing has installed skeleton rotary shaft sealing, the other end of bearing abutment facing is provided with framework dustproof loop, the outside of bearing abutment facing is between outer land scalariform, outer step is consistent with bearing outer ring nominal size, the body housing hole that both match is the same, be conducive to processing, outer step has an annular groove, annular groove inside is installed a seal ring and is sealed, the gap control of outer step and bearing outer ring mounting hole is between 0.05mm ~ 0.12mm, and the best is 0.08mm.
Compared with the gerotor motor of prior art, after above-mentioned modified node method of the present invention, motor can bear large radial force, also can bear certain axial force simultaneously, and processing, assembling all very convenient, the application area of motor can be expanded, its structure is conducive to reducing the extra feel trim actuator of client, cost-saving.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the structural representation of one embodiment of the invention one.
Dust ring 1 in figure, shaft seal 2, screw 3, O type circle 4, bearing 5, body shell 6, oil port cover 7, O type circle 12, every dish 13, stator 14, rotor 15, pin tooth 16, bonnet 17, plug screw 18, rivet 19, label 20, bolt 21, output shaft 22, couple axle 23, back-up ring 24, protecgulum 25.
Fig. 2 is the structural representation of output shaft 22 in Fig. 1 embodiment one.
Fig. 3 is the close-up schematic view of output shaft 22 in Fig. 1 embodiment one.
Fig. 4 is the structural representation of one embodiment of the invention two.
Dust ring 1 in figure, shaft seal 2, screw 3, O type circle 4, bearing 5, body shell 6, oil port cover 7, elastomer 8, valve ball 9, valve body 10, seal ring 11, O type circle 12, every dish 13, stator 14, rotor 15, pin tooth 16, bonnet 17, plug screw 18, rivet 19, label 20, bolt 21, output shaft 22, couple axle 23, back-up ring 24, protecgulum 25.
Fig. 5 be the embodiment of the present invention two every dish 13 towards body shell 6 one side structural representation.
Bolt connecting hole 01 in figure, high low pressure oil passage 02, internal drainage liquid one-way valve return opening passage 03,04.
Embodiment one
The bearings axle valve flow distribution cycloid hydraulic motor of the present embodiment can bear large radial force, and certain axial force, motor configuration is larger, discharge capacity 160-630 milliliter/turn, basic structure as shown in Figure 1, mainly comprise output shaft 22, protecgulum 25, body shell 6, couple axle 23, every dish 13, turn stator pinwheel pair 14, 15 and 16, bonnet 17 etc., wherein cycloidal pinion engaged pair is by rotor, stator and pin tooth composition, stator 14 be jointly fixed on body shell 6 every dish 13 and bonnet 17 by bolt 21, thus formed seven only in consubstantiality shell 6 flow duct, every the cavity that the high low pressure oil through of dish 13 communicates one by one.
Described bearings axle valve flow distribution cycloid hydraulic motor, one end is the body shell 6 being shaped with liquid entering hole and refluxing opening, and the other end is the cycloidal pin wheel set primarily of stator 14 and rotor 15 and pin tooth 16 formation; The output shaft 22 that outer end extends out is equipped with in described body shell 6 one end, and the couple axle 23 that two ends are engaged with described output shaft 22 the inner and rotor 15 internal spline is respectively equipped with at middle part; Its improvements are: the front end of described output shaft 22 is installed and born radial force bearing, described bearing is two single-groove grooved ball bearings 5, bearing outer ring one end is resisted against on protecgulum, the other end is resisted against on the step hole of body shell, bearing inner race one end is resisted against on the output shaft shaft shoulder, and the other end is fixed by shaft block ring 24.
The described radial force bearing 5 that bears also can be selfaligning bearing, is bearing under radial force working condition little a little.
Described bearing 5 outer ring adopts a kind of more loose coordinating with the mounting hole of body shell 6, and described cooperation adopts transition fit, from magnitude of interference 0.01mm to gap 0.015mm.More loose cooperation described in employing, the needs of the relative movement of the formation oil film of the axle valve of the flow-distribution mechanism mainly formed in order to the aperture of the diameter of axle of the output shaft 22 of applicable bearings axle valve flow distribution cycloid hydraulic motor and body shell 6, the diameter of axle of described output shaft 22 and the aperture motion of body shell 6 form the function of similar sliding bearing, certain radial force can be born, the matching gap in the diameter of axle of output shaft 22 and the aperture of body shell 6 controls at 0.012mm ~ 0.026mm, large value is selected under higher motion speed, little value is selected under compared with harmonic motion speed, the more loose cooperation of described bearing 5 be make output shaft 22 at work the oil film of flow-distribution mechanism need to be formed.
Output shaft 22 is shaped with distributing construction, with in body shell 6 flow duct jointly coordinate and there is flow function, this device machined cannelure and two circular grooves of 12 uniform dislocation, described cannelure becomes staggered and links up with two circular grooves, two circular grooves communicate respectively with into and out of hydraulic fluid port, body shell 6 machined the duct with high low pressure fluid and flow duct, the radially direct hole in cannelure and the flow duct of body shell 6 or groove phase flow, described cannelure is defined by a radius, and processed by the direct feed of milling cutter.The axle valve that output shaft 22 is formed jointly with body shell 6 constitutes the flow function that flow-distribution mechanism realizes keeping oil hydraulic motor continuous running.
Output shaft 22 basic structure as shown in Figure 2, the endoporus that output shaft 22 front end is meshed with couple axle 23 has an aperture and leads to the mounting groove trough box drain close to shaft block ring 24, major part is in groove, when shaft block ring 24 is installed, open part is just to aperture, be conducive to motor and form inner oil circulation, the front sealing band also helping flow-distribution mechanism increases.The internal spline be meshed with couple axle 23 of described output shaft 22 adopts cold-extrusion technology to make, and the terminal surface of internal spline is conical, is 6 degree to 10 degree with radial alignment angle [alpha].
I partial enlargement basic structure of output shaft 22 as shown in Figure 3, before and after the circular groove of the flow-distribution mechanism of output shaft 22, two-part at least have a tiny annular groove, due to the existence of the matching gap in the diameter of axle of output shaft 22 and the aperture of body shell 6, the infiltration of high-voltage oil liquid, form motion oil film, described annular groove is conducive to formation and the existence of oil film, and motion annular groove high-voltage oil liquid is assembled, and reduces the leakage produced due to gap further.Described annular groove is a circular arc, is highly not more than 0.5mm, and described annular groove also can be a square groove shape, is highly not more than 1mm.
The mounting hole of described bearing 5 outer ring and body shell 6 increase by a step surface against end face, step surface minimum clearance is 0.3mm, prevent from contacting with inner ring, the installation shaft shoulder of bearing 5 inner ring and output shaft 22 increase by a step surface against end face, step surface minimum clearance is 0.3mm, prevents from contacting with outer ring.
The protecgulum 25 of described output shaft front end is step-like, the interior step of bearing 5 abutment facing has installed skeleton rotary shaft sealing 2, the other end of bearing 5 abutment facing is provided with framework dustproof loop 2, the outside of bearing 5 abutment facing is between outer land scalariform, outer step is consistent with bearing 5 outer ring nominal size, large about the 0.03mm in body housing hole aperture that the former matches, be conducive to bearing assemble, sealing surface can not be damaged during installation, the outer step of described protecgulum 25 has an annular groove, annular groove inside is installed a seal ring and is sealed, described seal ring can be O type circle 4, the described protecgulum outer step diameter of axle and the gap control of bearing outer ring mounting hole are between 0.05mm ~ 0.12mm, the best is 0.08mm.
The one-way valve that motor described in above-described embodiment does not communicate with oil inlet and outlet, skeleton rotary shaft sealing 2 adopts high pressure shaft seal, directly bears high back pressure; Also common cycloid oil hydraulic motor shaft seal can be adopted, for the outer drain tap of protection rotary shaft sealing must direct fuel tank.
Embodiment two
The basic structure of embodiment two as shown in Figure 4, body shell 6 is shaped with the drainback passage be communicated with motor internal cavity, described drainback passage is loop structure, two one-way valves are installed in described passage, two one-way valve one end are connected with return opening with filler opening respectively, the other end is respectively by internal drainage liquid one-way valve return opening passage 03 on dish 13, 04 is communicated with motor internal cavity, every dish 13 towards body shell 6 one side as shown in Figure 5, the described internal drainage liquid one-way valve return opening passage 03 on dish 13, 04 radially distributes, position is corresponding with the one-way valve hole site on body shell 6, return opening passage 03, 04 circular arc formed by Milling Process and tangent linear structure, tangent straight line becomes to be less than 10 degree of angles towards turning stator direction, be conducive to oil return.One-way valve is made up of elastomer 8, valve ball 9, valve body 10, seal ring 11.Valve body 10 one-tenth step is poroid, is arranged in body shell 6 by seal ring 11.The large end of step hole is built with valve ball 9, the outside of this valve ball is resisted against on elastomer 8, seal ring 11 can be O type circle, also can be the Glais ring structure of the outer fluoridize circle composition of O type circle, because internal messing cycloidal pinion engaged pair is under the driving of high low pressure hydraulic oil, while generation moment of torsion, for ensureing that flexible rotating needs certain gap between its each revolute pair, have a small amount of oil liquid leakage unavoidably and enter motor internal cavity, and then got back in system fuel tank by one-way valve, or got back in system fuel tank by the outer drain tap T of plug screw 18 position.
The present embodiment have employed two one-way valves and communicates with oil inlet and outlet, is conducive to protecting rotary shaft sealing.
Facts have proved, the Coefficient of discharge of bearings axle valve flow distribution cycloid hydraulic motor of the present invention is less, parts machining process moderate accuracy, the good manufacturability of assembling, reliability is high, and compact structure, larger radial force can be born, thus improve cost performance and the applying working condition of product.The locating stud of the conventional construction that the bearing installation diameter of axle solving structure described in US3547563, CN200820035921.1 is separated with the flow diameter of axle affects flow precision problem, structure and parameter choose reasonable of the present invention solves traditional design and does not adopt design concept Integral output shaft increasing bearing, other the diameter of axle and the roughly the same existing product of the machining accuracy in hole.
In addition to the implementation, the present invention can also have other mode of executions.Such as, adopt the diameter of axle of different bearings to adapt to the rotary shaft sealing of the different diameters of axle, or the position that output shaft front end has an aperture of the endoporus that to be meshed with couple axle adjust etc.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (6)
1. a radial support axle valve flow distribution cycloid hydraulic motor, one end is the body shell being shaped with liquid entering hole and refluxing opening, and the other end is the cycloidal pin wheel set formed primarily of stators and rotators, the output shaft that outer end extends out is equipped with in described body shell one end, and the couple axle that two ends are engaged with described output shaft the inner and rotor internal spline is respectively equipped with at middle part, it is characterized in that: the front end of described output shaft is installed and born radial force bearing, described bearing is two single-groove grooved ball bearings, bearing outer ring one end is resisted against on protecgulum, the other end is resisted against on the step hole of body shell, bearing inner race one end is resisted against on the output shaft shaft shoulder, the other end is fixed by shaft block ring, described bearing outer ring adopts a kind of more loose coordinating with the mounting hole of body shell, described cooperation is transition fit, described transition fit is from magnitude of interference 0.01mm to gap 0.015mm, the matching gap of the described aperture of body shell and the diameter of axle of output shaft controls at 0.012mm ~ 0.026mm.
2. radial support axle valve flow distribution cycloid hydraulic motor according to claim 1, it is characterized in that: described bearing outer ring against protecgulum be step-like, the interior step of bearing abutment facing has installed skeleton rotary shaft sealing, and the other end of bearing abutment facing is provided with framework dustproof loop; The outside of bearing abutment facing is between outer land scalariform, and described outer step has an annular groove, described annular groove installs a seal ring.
3. radial support axle valve flow distribution cycloid hydraulic motor according to claim 2, is characterized in that: the gap control of described outer step and bearing outer ring mounting hole is between 0.05mm ~ 0.12mm.
4. radial support axle valve flow distribution cycloid hydraulic motor according to claim 3, it is characterized in that: the internal spline of described output shaft adopts cold-extrusion technology to make, the terminal surface of described internal spline is conical, and described circular cone and radial alignment angle [alpha] are 6 degree to 10 degree.
5. radial support axle valve flow distribution cycloid hydraulic motor according to claim 4, is characterized in that: before and after the flow-distribution mechanism circular groove of described output shaft, two-part at least have a tiny annular groove.
6. radial support axle valve flow distribution cycloid hydraulic motor according to claim 5, is characterized in that: the one-way valve that described motor does not communicate with oil inlet and outlet, and skeleton rotary shaft sealing adopts high pressure shaft seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210329200.2A CN102828895B (en) | 2012-09-07 | 2012-09-07 | Radial support axle valve flow distribution cycloid hydraulic motor |
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| CN201210329200.2A CN102828895B (en) | 2012-09-07 | 2012-09-07 | Radial support axle valve flow distribution cycloid hydraulic motor |
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| CN102828895A CN102828895A (en) | 2012-12-19 |
| CN102828895B true CN102828895B (en) | 2015-10-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103615354A (en) * | 2013-11-16 | 2014-03-05 | 镇江大力液压马达股份有限公司 | Large-displacement integrated rotor and stator pair cycloid hydraulic motor |
| WO2018108039A1 (en) * | 2016-12-13 | 2018-06-21 | 镇江大力液压马达股份有限公司 | Cycloid hydraulic motor |
| CN110107448B (en) * | 2019-05-27 | 2021-04-02 | 中国人民解放军海军工程大学 | Inner gearing hydraulic motor capable of four-quadrant operation |
| CN110331475A (en) * | 2019-07-11 | 2019-10-15 | 经纬智能纺织机械有限公司 | A kind of gipsy sheave stand-off combination unit in spinning frame elevating mechanism |
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| CN201924388U (en) * | 2010-11-19 | 2011-08-10 | 安徽理工大学 | Integral-formation excavating equipment for reinforcing inspection well |
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| DE19535372B4 (en) * | 1995-09-25 | 2005-08-04 | Archimedes Voulgaris Hydraulikmotorenbau Gmbh | Hydraulic machine |
| CN2330838Y (en) * | 1998-01-25 | 1999-07-28 | 金平 | Pressure-balancing coaxial valve |
| CH701073B1 (en) * | 2004-07-22 | 2010-11-30 | Siegfried A Dipl-Ing Eisenmann | Hydrostatic rotary engine. |
| CN201137549Y (en) * | 2007-08-23 | 2008-10-22 | 镇江大力液压马达有限责任公司 | Valve spindle cycloid hydraulic motor |
| CN201106522Y (en) * | 2007-09-24 | 2008-08-27 | 镇江大力液压马达有限责任公司 | Axial transmission collocation axis valve flow-matching cycloid hydraulic motor |
| CN201121555Y (en) * | 2007-11-26 | 2008-09-24 | 镇江大力液压马达有限责任公司 | Dual-spindle output shaft valve flow distribution cycloid hydraulic motor |
| WO2011161117A2 (en) * | 2010-06-23 | 2011-12-29 | Eisenmann Siegfried A | Continuously variable volume hydrostatic rotary piston machine |
| CN202937402U (en) * | 2012-09-07 | 2013-05-15 | 镇江大力液压马达有限责任公司 | Radial support shaft valve wagon-flow allocation cycloid hydraulic motor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2545386Y (en) * | 2002-05-31 | 2003-04-16 | 宁波中意液压马达有限公司 | Axial oil distribution cycloidal hydraulic motor |
| CN201924388U (en) * | 2010-11-19 | 2011-08-10 | 安徽理工大学 | Integral-formation excavating equipment for reinforcing inspection well |
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