CN103629042B - Axle valve flow distribution cycloid hydraulic motor - Google Patents

Axle valve flow distribution cycloid hydraulic motor Download PDF

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Publication number
CN103629042B
CN103629042B CN201310584115.5A CN201310584115A CN103629042B CN 103629042 B CN103629042 B CN 103629042B CN 201310584115 A CN201310584115 A CN 201310584115A CN 103629042 B CN103629042 B CN 103629042B
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output shaft
body shell
needle bearing
hydraulic motor
flow distribution
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CN103629042A (en
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王志生
张智敏
张常青
盛玉川
周峰
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ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
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ZHENJIANG DALI HYDRAULIC MOTOR CO Ltd
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Publication of CN103629042A publication Critical patent/CN103629042A/en
Priority claimed from EP14863301.9A external-priority patent/EP3073133B8/en
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Abstract

The present invention relates to a kind of axle valve flow distribution cycloid hydraulic motor, belong to hydraulic transmission detection technique field.This motor comprises the protecgulum and body shell that are mutually connected, and the cycloidal pin wheel set that one end is consisted of the stators and rotators be connected every dish and body shell, the other end and bonnet are connected; The output shaft that body shell extends built with outer end, output shaft is in transmission connection by couple axle and rotor; Its improvements are: the endoporus of body shell is the through hole of same internal diameter, the identical front needle bearing of external diameter and rear needle bearing are installed respectively with rear end in output shaft front portion wherein, the length of front needle bearing is greater than the length of rear needle bearing, and the shaft shoulder of output shaft correspondence front needle bearing front end is resisted against the rear back-up ring of plain thrust bearing.The present invention is under the compact prerequisite of holding structure, and the radial bearing capacity of oil hydraulic motor improves, and also enhances axial load ability simultaneously, processing and assembly process process good.

Description

Axle valve flow distribution cycloid hydraulic motor
Technical field
The present invention relates to a kind of oil hydraulic motor, especially a kind of axle valve flow distribution cycloid hydraulic motor, belong to hydraulic transmission detection technique field.
Background technique
Cycloid hydraulic motor is a kind of low-speed big torque 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 cycloid hydraulic motor 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, generally preceding is axle Flat valve, posterior is plane flow, and 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 drive and rotate, and this is rotated through couple axle and is delivered to output shaft output, thus realizes the conversion of hydraulic energy to mechanical energy.Meanwhile, flow-distribution mechanism (also known as 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, motor continuous print output torque.
According to the applicant understood, the compact axle valve flow distribution cycloid hydraulic motor development of existing structure is rapidly (as the BM1 that claimant produces, BMP, BMR product), although the flow-distribution mechanism sliding bearing in prior art oil hydraulic motor can bear certain radial force, but due to its structural limitations, and be not suitable for driving external gear pump, the operating mode of sprocket wheel or the large radial force of Direct driver, even if set up radial needle bearing or ball bearing (radial needle bearing support as inconsistent in installation dimension before and after Chinese patent CN200720041824.9 employing, CN201220454428.X adopts the front end of output shaft to install the ball bearing bearing radial force), the ability of bearing large radial force is still difficult to significantly improve, also likely cause to leak and increase.
Summary of the invention
The object of the invention is to: by architecture advances, propose a kind of under maintenance compact structure prerequisite, radial load ability is improved, seal usefulness is strengthened, and has the axle valve flow distribution cycloid hydraulic motor of good process.
In order to achieve the above object, claimant is by the structural analysis to axle valve flow distribution cycloid hydraulic motor, especially to the research of its integral structure layout, have found to improve and bear the multiple weak link of radial capacity, thus under the prerequisite keeping existing motor boundary dimension constant, following technological scheme is proposed: a kind of axle valve flow distribution cycloid hydraulic motor, comprise the protecgulum and body shell that are mutually connected, and the cycloidal pin wheel set that one end is consisted of the stators and rotators be connected every dish and body shell, the other end and bonnet are connected; The output shaft that described body shell extends built with outer end, described output shaft is in transmission connection by couple axle and rotor; Its improvements are: the endoporus of described body shell is the through hole of same internal diameter, the identical front needle bearing of external diameter and rear needle bearing are installed respectively with rear end in output shaft front portion wherein, the length of described front needle bearing is greater than the length of rear needle bearing, and the shaft shoulder of described output shaft correspondence front needle bearing front end is resisted against the rear back-up ring of plain thrust bearing.
Because body shell internal diameter is consistent, therefore process and assemble all very convenient, and according to the comparatively large rationally bearing of setting of front end load and the combination of front needle bearing and plain thrust bearing, further enhancing the bearing capacity of front needle roller, therefore, compared with prior art, under the prerequisite that holding structure is compact, the radial bearing capacity of oil hydraulic motor improves, also enhance axial load ability simultaneously, processing and assembly process process good.
The present invention further improves, and the rear end that described output shaft installs front needle bearing is and described body shell endoporus dynamic matching postion that described dynamic matching postion has at least two sections of circumferential intermittent oil grooves; The eccentric segmental arc that the bottom land of described interruption oil groove departs from technique throw of eccentric by the center of circle of the center of circle and described dynamic matching postion cylindrical is formed, and the radius of described eccentric segmental arc is greater than the outer radius of a circle of described dynamic matching postion.
Like this, avoid output shaft by annular oil groove compartment, therefore be conducive to strengthening radial bearing capacity, and by the conventional frock clampings such as four jaw chuck (or special process equipment), get final product car or grind required oil groove, without the need to needing loaded down with trivial details Milling Process as the dark oil grooves such as circumferential intermittent, thus contribute to significantly improving work efficiency, reduce manufacture cost, and oil groove replaces the low even depth oil groove of original concentric arcs at the bottom of the eccentric arc to reduce gradually to the two ends degree of depth with centre, from appearance oil that is theoretical and that be in fact all more conducive in oil groove from oil groove two ends to the adjacent oil groove of output shaft dynamic matching postion between cylindrical section ooze defeated, and then spread to both sides, thus form oil film better, ensure lubrication and sealing, in the motion of axle valve, the high pressure oil film that crescent shape oil groove is formed contributes to the sliding bearing that axle valve formed and bears the ability of radial force.
It is that the front back-up ring of described plain thrust bearing is installed and is resisted against on the end surface of step hole in protecgulum that the present invention further improves, and installs shaft seal, thus ensure that reliable sealing in the step hole before described front back-up ring.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the structural representation of the embodiment of the present invention one.
In figure: output shaft 1, key 2, dust ring 3, shaft seal 4, screw 5, protecgulum 6, valve body 7, seal ring 8, valve ball 9, body shell 10, oil port cover 11, O type circle 12, every dish 13, cycloidal pin wheel set 14, bonnet 15, plug screw 16, pad 17, steel plate washer 18, bolt 19, rear needle bearing 20, couple axle 21, front needle bearing 22, rear back-up ring 23, O type circle 24, plain thrust bearing 25, front back-up ring 26.
Fig. 2 is the structural representation of output shaft in Fig. 1 embodiment.
Fig. 3 is the sectional view of Fig. 1 embodiment transfer stator pair.
The middle oil-break groove relevant parameter geometrical relationship figure that Fig. 4 is direction cutting shown in Fig. 2 dynamic matching postion arrow.
Fig. 5 is the structure for amplifying schematic diagram of shaft seal in Fig. 1 embodiment.
Fig. 6 is the structural representation of the embodiment of the present invention two.
Fig. 7 is the sectional view of Fig. 6 embodiment transfer stator pair.
embodiment one
The axle valve flow distribution cycloid hydraulic motor basic structure of the present embodiment as shown in figures 1 and 3, substantially identical with prior art is, comprise the protecgulum 6 and body shell 10 that are mutually connected, and the cycloidal pin wheel set 14 that one end is consisted of the stators and rotators be connected every dish 13 and body shell 10, the other end is connected with bonnet 15, integrated type turns that stator is secondary to be made up of stator 14-1 and rotor 14-2.The output shaft 1 that body shell 10 extends built with outer end, the internal spline of this output shaft is in transmission connection by the internal spline of couple axle 21 with rotor.
The endoporus of body shell 10 is the through hole of same internal diameter, output shaft 1 is wherein anterior installs the identical front needle bearing of external diameter 22 and rear needle bearing 20 respectively with rear end, the length of front needle bearing 22 is greater than the length of rear needle bearing 20, and the shaft shoulder of corresponding front needle bearing 22 front end of output shaft 1 is resisted against the rear back-up ring 23 of plain thrust bearing 25.
Output shaft 1 wherein as shown in Figure 2, is made up of the large footpath section 1-2 and the path section 1-1 stretched out outside body shell being positioned at cycloid hydraulic motor body shell 10 after assembling.Path section 1-1 is shaped with keyway, to connect transferring power and motion by key.The endoporus of large footpath section 1-2 has the internal spline meshing engagement structure be in transmission connection with oil hydraulic motor couple axle 21, its outer round surface two ends have the forward and backward necking segment of installing forward and backward needle bearing 22,20 respectively, before contiguous between forward and backward necking segment, necking segment place has and body shell 10 endoporus dynamic matching postion 1-2-1, in addition also there is between forward and backward necking segment the structure (substantially identical with prior art, separately not repeat) that other forms axle flow.Dynamic matching postion 1-2-1 has the uniform interruption oil groove 1-2-2 of three sections of circumferences.As shown in Figure 4, the eccentric segmental arc that each bottom land being interrupted oil groove 1-2-2 departs from technique eccentric distance e by center of circle O ' and the center of circle O of dynamic matching postion 1-2-1 cylindrical is formed, and the radius R of this eccentric segmental arc is greater than the radius r of dynamic matching postion 1-2-1 cylindrical.Obviously, e=R+h-r; E---technique throw of eccentric (mm); R---eccentric segmental arc radius (mm); H---be interrupted oil groove maximum depth (mm), be generally 0.3mm to 1.0mm; R---dynamic matching postion radius (mm), the radius of different series fluid distribution of hydraulic motor axle is different, and such as BMP, BMR series is definite value 21mm to 21.5mm.During design, the radius r of dynamic matching postion, the outer arc length l(being interrupted oil groove or its institute are to central angle A, usually between 30 ° to 65 °), maximum depth h all and the circumferential interval of existing design, dark oil groove is consistent at the bottom of concentric arcs etc., according to mathematics general knowledge such as the cosine laws, be not difficult to find out geometrical relationship each other by Fig. 4, set up technique eccentric distance e and radius R that system of equations solve eccentric segmental arc.
The front back-up ring 26 of plain thrust bearing 25 is installed and is resisted against on the end surface of step hole in protecgulum 6, installs shaft seal 4 in the step hole before front back-up ring 26.The concrete structure of this shaft seal as shown in Figure 5, by cross section be L shape metal frame 4-1, be close to metal frame 4-1 interior edge face and there is the rectangular cross-section teflon back-up ring 4-2 in the face that to be sealed and matched with output shaft 1 outer round surface, and the rubber seal lip 4-3 of metal frame 4-1 and teflon back-up ring 4-2 formation semi-surrounding is formed, described rubber seal lip 4-3 has the sealing faying surface respectively with protecgulum 6 step hole internal surface and output shaft outer round surface, is filled between the cylindrical of described teflon back-up ring 4-2 and metal frame 4-1 by rubber seal lip 4-3.
In addition, body shell 10 is shaped with the circulation drainback passage be communicated with internal cavity, two one-way valves be made up of valve body 7, seal ring 8, valve ball 9 are installed in drainback passage, two one-way valve one end are connected with return opening with filler opening respectively, and the other end is communicated with motor internal cavity respectively by the internal drainage liquid one-way valve return opening passage between protecgulum 6 with body shell 10.Be conducive to like this protecting shaft seal.
Add man-hour, the endoporus of the same size of body shell 10 is straight hole, and at the equal one-pass of the operation such as car, mill, process very convenient, dimensional accuracy and the accuracy of form and position easily ensure.Interruption oil groove on output shaft then carries out according to the following steps: the first step, the output shaft clamping that basic shape processed, on index chuck, are being clamped on the four jaw chuck of lathe with the position of its axis runout turning rolling clamp gyration center technique throw of eccentric; Second step, startup lathe, order about four jaw chuck and rotate; 3rd step, the lathe tool adopting point of a knife position shape identical with being interrupted oil groove sectional shape, feed is cut according to the feed of maximum oil groove depth after making Lathe tool tip contact output shaft, can process first paragraph and be interrupted oil groove; 4th step, when keeping technique throw of eccentric, clamped after the angular position of four jaw chuck successively rotates 120 °, 240 ° by output shaft, by the operation that above second step is identical with the 3rd step, front and back process second segment, the 3rd intersegmental oil-break groove.
embodiment two
The axle valve flow distribution cycloid hydraulic motor basic structure of the present embodiment as shown in Figure 6 and Figure 7, its basic structure is identical with embodiment one, main difference is: cycloidal pin wheel set is wherein that edge pillar turns stator pair, be made up of rotor 14-1 ', stator 14-2 ' and pin tooth 14-3 ', and the integrated type being different from embodiment one turns stator pair, the setting of internal drainage liquid one-way valve is positioned at every the junction plane position of dish with body shell in addition.
Test proves, a series ofly seem trickle because above-described embodiment takes, actually effectively improve corrective measure, therefore the radial force ability to bear of oil hydraulic motor is improve nearly 40%, also improve axial load ability simultaneously, its compact structure, low-profile, the technique of part processing, assembling is good, thus the cost performance of traditional product is further enhanced.

Claims (6)

1. an axle valve flow distribution cycloid hydraulic motor, comprises the protecgulum and body shell that are mutually connected, and the cycloidal pin wheel set that one end is consisted of the stators and rotators be connected every dish and body shell, the other end and bonnet are connected; The output shaft that described body shell extends built with outer end, described output shaft is in transmission connection by couple axle and rotor; It is characterized in that: the endoporus of described body shell is the through hole of same internal diameter, the identical front needle bearing of external diameter and rear needle bearing are installed respectively with rear end in output shaft front portion wherein, the length of described front needle bearing is greater than the length of rear needle bearing, the shaft shoulder of described output shaft correspondence front needle bearing front end is resisted against the rear back-up ring of plain thrust bearing, the rear end that described output shaft installs front needle bearing is and described body shell endoporus dynamic matching postion that described dynamic matching postion has at least two sections of circumferential intermittent oil grooves; The eccentric segmental arc that the bottom land of described interruption oil groove departs from technique throw of eccentric by the center of circle of the center of circle and described dynamic matching postion cylindrical is formed, and the radius of described eccentric segmental arc is greater than the outer radius of a circle of described dynamic matching postion.
2. axle valve flow distribution cycloid hydraulic motor according to claim 1, is characterized in that: the front back-up ring of described plain thrust bearing is installed and is resisted against on the end surface of step hole in protecgulum, installs shaft seal in the step hole before described front back-up ring.
3. axle valve flow distribution cycloid hydraulic motor according to claim 2, it is characterized in that: described output shaft is made up of the large footpath section and the path section of stretching out outside body shell being positioned at body shell, the outer round surface two ends of described large footpath section have the forward and backward necking segment of installing forward and backward needle bearing respectively, before contiguous between described forward and backward necking segment, necking segment place has and body shell endoporus dynamic matching postion, and described dynamic matching postion has the uniform interruption oil groove of three sections of circumferences.
4. axle valve flow distribution cycloid hydraulic motor according to claim 3, it is characterized in that: described shaft seal by cross section be L shape metal frame, be close to metal frame interior edge face and there is the rectangular cross-section teflon back-up ring in the face that to be sealed and matched with output shaft outer round surface, and the rubber seal lip that metal frame and teflon back-up ring form semi-surrounding to be formed.
5. axle valve flow distribution cycloid hydraulic motor according to claim 4, is characterized in that: described rubber seal lip has the sealing faying surface contacted with protecgulum step hole internal surface and output shaft outer round surface respectively.
6. axle valve flow distribution cycloid hydraulic motor according to claim 5, is characterized in that: filled by rubber seal lip between the cylindrical of described teflon back-up ring and metal frame.
CN201310584115.5A 2013-11-20 2013-11-20 Axle valve flow distribution cycloid hydraulic motor Active CN103629042B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310584115.5A CN103629042B (en) 2013-11-20 2013-11-20 Axle valve flow distribution cycloid hydraulic motor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201310584115.5A CN103629042B (en) 2013-11-20 2013-11-20 Axle valve flow distribution cycloid hydraulic motor
EP14863301.9A EP3073133B8 (en) 2013-11-20 2014-07-31 Output shaft of cycloid hydraulic motor and shaft valve flow-distribution cycloid hydraulic motor
PCT/CN2014/083430 WO2015074440A1 (en) 2013-11-20 2014-07-31 Output shaft of cycloid hydraulic motor and shaft valve flow-distribution cycloid hydraulic motor

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CN103629042A CN103629042A (en) 2014-03-12
CN103629042B true CN103629042B (en) 2016-03-16

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644072B (en) * 2013-12-13 2016-02-17 镇江大力液压马达股份有限公司 A kind of shell hole of cycloid hydraulic motor and processing method thereof
CN103671465B (en) * 2014-01-17 2015-10-21 镇江大力液压马达股份有限公司 A kind of cycloid hydraulic motor output shaft and processing method thereof
CN106762386A (en) * 2017-01-17 2017-05-31 镇江大力液压马达股份有限公司 A kind of small-sized installation dimension high pressure cycloid hydraulic motor
CN107605656A (en) * 2017-10-01 2018-01-19 镇江大力液压马达股份有限公司 A kind of large-diameter axle distributing cycloid hydraulic motor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547537C1 (en) * 1995-12-20 1997-02-20 Hydraulik Nord Gmbh Rotation monitor for hydraulic motor
CN1932307A (en) * 2006-10-08 2007-03-21 镇江大力液压马达有限责任公司 High-speed distributing cycloid hydraulic motor
CN2890451Y (en) * 2006-03-20 2007-04-18 镇江大力液压马达有限责任公司 Small-module small-teeth eccentric swinging spline couple-axle
CN201057122Y (en) * 2007-04-11 2008-05-07 镇江大力液压马达有限责任公司 Strong-sealing high-speed stream cycloid hydraulic motor and high-pressure rotating shaft seal
CN201137548Y (en) * 2008-01-04 2008-10-22 镇江大力液压马达有限责任公司 Minisize axial-flow cycloid hydraulic motor
CN203584678U (en) * 2013-11-20 2014-05-07 镇江大力液压马达股份有限公司 Shaft valve flow-distributed cycloid hydraulic motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547537C1 (en) * 1995-12-20 1997-02-20 Hydraulik Nord Gmbh Rotation monitor for hydraulic motor
CN2890451Y (en) * 2006-03-20 2007-04-18 镇江大力液压马达有限责任公司 Small-module small-teeth eccentric swinging spline couple-axle
CN1932307A (en) * 2006-10-08 2007-03-21 镇江大力液压马达有限责任公司 High-speed distributing cycloid hydraulic motor
CN201057122Y (en) * 2007-04-11 2008-05-07 镇江大力液压马达有限责任公司 Strong-sealing high-speed stream cycloid hydraulic motor and high-pressure rotating shaft seal
CN201137548Y (en) * 2008-01-04 2008-10-22 镇江大力液压马达有限责任公司 Minisize axial-flow cycloid hydraulic motor
CN203584678U (en) * 2013-11-20 2014-05-07 镇江大力液压马达股份有限公司 Shaft valve flow-distributed cycloid hydraulic motor

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