CN103629042A - Shaft valve flow distribution cycloid hydraulic motor - Google Patents
Shaft valve flow distribution cycloid hydraulic motor Download PDFInfo
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- CN103629042A CN103629042A CN201310584115.5A CN201310584115A CN103629042A CN 103629042 A CN103629042 A CN 103629042A CN 201310584115 A CN201310584115 A CN 201310584115A CN 103629042 A CN103629042 A CN 103629042A
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- output shaft
- body shell
- hydraulic motor
- needle bearing
- cycloid hydraulic
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Abstract
The invention relates to a shaft valve flow distribution cycloid hydraulic motor and belongs to the technical field of hydraulic transmission detection. The motor comprises a front cover and a body shell which are connected with each other, and a cycloid pin wheel pair composed of a stator and a rotor, wherein one end of the cycloid pin wheel pair is fixedly connected with the body shell by a separation disc and the other end of the cycloid pin wheel pair is fixedly connected with a rear cover; the body shell is internally provided with an output shaft extended by the outer end; the output shaft is in transmission connection with the rotor by a linking shaft. The improvement is as follows: an inner hole of the body shell is a through hole with the same inner diameter; a front needle bearing and a rear needle bearing which have the same outer diameter are arranged on the front part and the rear end of the output shaft respectively; the length of the front needle bearing is longer than that of the rear needle bearing; a shaft shoulder, which corresponds to the front end of the front needle bearing, of the output shaft is abutted against a rear retainer ring of a plane thrust bearing. According to the shaft valve flow distribution cycloid hydraulic motor, under the precondition of keeping a compact structure, the radial bearing capability of the hydraulic motor is improved, the axial bearing capability is also enhanced and the machining and assembling manufacturability is good.
Description
Technical field
The present invention relates to a kind of oil hydraulic motor, especially a kind of axle valve distributing cycloid hydraulic motor, belongs 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, thereby is widely applied.
The basic structure of cycloid hydraulic motor is on body shell or bonnet, to be shaped with liquid entering hole and refluxing opening, cycloidal pinion engaged pair and flow-distribution mechanism are equipped with in one end, flow-distribution mechanism can be placed on before or after cycloidal pinion engaged pair, general preceding is axle valve flow, after be plane flow, the other end is equipped with output shaft.The rotor of cycloidal pinion engaged pair meshes by the external gear of internal spline and 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 be communicated with the expansion engagement chamber of cycloidal pin wheel set, and the contraction chamber of cycloidal pin wheel set is communicated with refluxing opening.As a result, pressured fluid, from liquid entering hole enters body shell or bonnet, enters the expansion engagement chamber that cycloidal pinion engaged pair forms, and its volume is constantly expanded, and in the contraction engagement chamber that cycloidal pinion engaged pair forms simultaneously, liquid refluxes from refluxing opening; In this process, the rotor of cycloidal pinion engaged pair is expanded engagement chamber and drives rotation with the pressure difference of shrinking engagement chamber, and this rotation is delivered to output shaft by couple axle exports, thereby realizes hydraulic energy to the conversion of mechanical energy.Meanwhile, flow-distribution mechanism (claiming again axle valve) is also by couple axle driven rotary, and the continuous switching connected state going round and beginning again, is continued transfer process, the output torque that motor is continuous.
According to the applicant understood, the axle valve distributing cycloid hydraulic motor development of existing structure compactness is rapidly (as the BM1 of claimant's production, 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, sprocket wheel or directly drive the operating mode of large radial force, even if setting up radial needle bearing or ball bearing (supports as Chinese patent CN200720041824.9 adopts the front and back inconsistent radial needle bearing of installation dimension, CN201220454428.X adopts the front end of output shaft that the ball bearing of bearing radial force is installed), 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 maintenance under compact structure prerequisite, radially load ability is improved, seals usefulness and strengthened, and has the axle valve distributing cycloid hydraulic motor of good process.
In order to achieve the above object, claimant is by the structural analysis to axle valve distributing cycloid hydraulic motor, especially the research of Dui Qi integral structure layout, found out to improve and born a plurality of weak links of radial capacity, thereby keeping under the constant prerequisite of existing motor boundary dimension, following technological scheme is proposed: a kind of axle valve distributing cycloid hydraulic motor, comprise the protecgulum and the body shell that are mutually connected, and one end is by the cycloidal pin wheel set of the stator every dish and body shell are connected, the other end and bonnet are connected and rotor formation; The extended output shaft in outer end is housed in described body shell, and described output shaft is in transmission connection by couple axle and rotor; Its improvements are: the through hole that the endoporus of described body shell is same internal diameter, front needle bearing and the rear needle bearing that external diameter is identical 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 the front needle bearing front end of described output shaft correspondence is resisted against the rear back-up ring of plain thrust bearing.
Because body shell internal diameter is consistent, therefore processing and assembling are all very convenient, and according to the large bearing rationally arranging of front end load and the combination of front needle bearing and plain thrust bearing, further strengthened the bearing capacity of front needle roller, therefore compared with prior art, keeping under the prerequisite of compact structure, the radially bearing capacity of oil hydraulic motor improves, also strengthened axial load ability, processing and assembly process process are good simultaneously.
It is that the rear end that described output shaft is installed 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 that the present invention further improves; 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 forms, and the radius of described eccentric segmental arc is greater than the outer radius of a circle of described dynamic matching postion.
Like this, avoided output shaft by annular oil groove compartment, therefore be conducive to strengthen radially 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 need loaded down with trivial details Milling Process as the dark oil grooves such as circumferential intermittent, thereby contribute to significantly improve work efficiency, reduce manufacture cost, and at the bottom of the eccentric arc reducing gradually to the two ends degree of depth with centre, oil groove replaces the even depth oil groove that original concentric arcs is low, from appearance oil theoretical and that be in fact all more conducive in oil groove, from oil groove two ends, to the cylindrical section between the adjacent oil groove of output shaft dynamic matching postion, ooze defeated, and then spread to both sides, thereby form better oil film, guarantee lubricated and sealing, in the motion of axle valve, the high pressure oil film that crescent shape oil groove forms contributes to the ability of the sliding bearing bearing radial force of axle valve formation.
The present invention further improves, and 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, shaft seal is installed in the step hole before described front back-up ring, thereby has guaranteed reliable sealing.
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.
Fig. 4 is the middle oil-break groove relevant parameter geometrical relationship figure that shown in Fig. 2 dynamic matching postion arrow, direction is dissectd.
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 distributing cycloid hydraulic motor basic structure of the present embodiment as shown in figures 1 and 3, essentially identically with prior art be, comprise the protecgulum 6 and the body shell 10 that are mutually connected, and one end is by the cycloidal pin wheel set 14 of the stator every dish 13 and body shell 10 are connected, the other end and bonnet 15 are connected and rotor formation, integrated type turns stator pair and is comprised of stator 14-1 and rotor 14-2.The extended output shaft 1 in outer end is housed in body shell 10, and the internal spline of this output shaft is in transmission connection by couple axle 21 and the internal spline of rotor.
The endoporus of body shell 10 is the through hole of same internal diameter, the front needle bearing 22 and rear needle bearing 20 that external diameter is identical installed respectively with rear end in output shaft 1 front portion wherein, the length of front needle bearing 22 is greater than the length of rear needle bearing 20, and the shaft shoulder of output shaft 1 corresponding front needle bearing 22 front ends is resisted against the rear back-up ring 23 of plain thrust bearing 25.
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, in the step hole before front back-up ring 26, shaft seal 4 is installed.The concrete structure of this shaft seal as shown in Figure 5, by cross section, be L shaped metal frame 4-1, be close to metal frame 4-1 interior edge face and have and the be sealed and matched rectangular cross-section teflon back-up ring 4-2 of face of 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 respectively the sealing faying surface with protecgulum 6 step hole internal surfaces and output shaft outer round surface, between the cylindrical of described teflon back-up ring 4-2 and metal frame 4-1, by rubber seal lip 4-3, is filled.
In addition, body shell 10 is shaped with the circulation drainback passage being communicated with internal cavity, two one-way valves that consist 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 with the internal drainage liquid one-way valve return opening passage between body shell 10 by protecgulum 6 respectively.Be conducive to like this protect shaft seal.
Add man-hour, the endoporus of body shell 10 same sizes is straight hole, at the equal one-pass of the operations such as car, mill, processes very conveniently, and dimensional accuracy and the accuracy of form and position easily guarantee.Interruption oil groove on output shaft carries out according to the following steps: the first step, output shaft clamping that basic shape is processed, on index chuck, are clamped on the four jaw chuck of lathe in the position with its axis runout turning rolling clamp gyration center technique throw of eccentric; Second step, startup lathe, order about four jaw chuck rotation; The 3rd step, the employing point of a knife position shape lathe tool identical with being interrupted oil groove sectional shape, feed makes after Lathe tool tip contact output shaft, according to maximum oil groove depth feed cutting, can process first paragraph interruption oil groove; The 4th step, in the situation that keeping technique throw of eccentric, output shaft is clamped after the angular position of four jaw chuck is successively rotated 120 °, 240 °, by above second step and the identical operation of the 3rd step, front and back process second segment, the 3rd intersegmental oil-break groove.
embodiment two
The axle valve distributing 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, by rotor 14-1 ', stator 14-2 ' and pin tooth 14-3 ', formed, and the integrated type that is different from embodiment one turns stator pair, the setting of internal drainage liquid one-way valve is positioned at the junction plane position with body shell every dish in addition.
Evidence, because above-described embodiment has been taked a series ofly to seem trickle, actually effectively improve corrective measure, therefore the radial force ability to bear of oil hydraulic motor has been improved to nearly 40%, also improved axial load ability simultaneously, its compact structure, profile are small and exquisite, the technique of part processing, assembling is good, thereby the cost performance of traditional product is further enhanced.
Claims (7)
1. an axle valve distributing cycloid hydraulic motor, comprises the protecgulum and the body shell that are mutually connected, and one end is by the cycloidal pin wheel set of the stator every dish and body shell are connected, the other end and bonnet are connected and rotor formation; The extended output shaft in outer end is housed in described body shell, and described output shaft is in transmission connection by couple axle and rotor; It is characterized in that: the through hole that the endoporus of described body shell is same internal diameter, front needle bearing and the rear needle bearing that external diameter is identical 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 the front needle bearing front end of described output shaft correspondence is resisted against the rear back-up ring of plain thrust bearing.
2. axle valve distributing cycloid hydraulic motor according to claim 1, is characterized in that: the rear end that described output shaft is installed 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 forms, and the radius of described eccentric segmental arc is greater than the outer radius of a circle of described dynamic matching postion.
3. axle valve distributing cycloid hydraulic motor according to claim 2, 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, and shaft seal is installed in the step hole before described front back-up ring.
4. axle valve distributing cycloid hydraulic motor according to claim 3, it is characterized in that: described output shaft consists of the path section that is positioned at the large footpath section of body shell and stretch out outside body shell, the outer round surface two ends of described large footpath section have the forward and backward necking segment that forward and backward needle bearing is installed 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 three sections of circumferential uniform interruption oil grooves.
5. axle valve distributing cycloid hydraulic motor according to claim 4, it is characterized in that: described shaft seal is L shaped metal frame, is close to metal frame interior edge face and has and the be sealed and matched rectangular cross-section teflon back-up ring of face of output shaft outer round surface by cross section, and the rubber seal lip that metal frame and teflon back-up ring form semi-surrounding is formed.
6. axle valve distributing cycloid hydraulic motor according to claim 5, is characterized in that: described rubber seal lip has respectively the sealing faying surface with protecgulum 6 step hole internal surfaces and output shaft outer round surface.
7. axle valve distributing cycloid hydraulic motor according to claim 6, is characterized in that: between the cylindrical of described teflon back-up ring and metal frame, by rubber seal lip, filled.
Priority Applications (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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103629042A true CN103629042A (en) | 2014-03-12 |
| CN103629042B CN103629042B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310584115.5A Active CN103629042B (en) | 2013-11-20 | 2013-11-20 | Axle valve flow distribution cycloid hydraulic motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644072A (en) * | 2013-12-13 | 2014-03-19 | 镇江大力液压马达股份有限公司 | Shell hole of cycloid hydraulic motor and machining method thereof |
| CN103671465A (en) * | 2014-01-17 | 2014-03-26 | 镇江大力液压马达股份有限公司 | Cycloid hydraulic motor output shaft and machining 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 |
| CN108916246A (en) * | 2018-09-20 | 2018-11-30 | 镇江大力液压马达股份有限公司 | A kind of output support device of cycloid hydraulic motor |
| CN114667406A (en) * | 2019-12-10 | 2022-06-24 | 舍弗勒技术股份两合公司 | Device for regulating the pressure of a flowing medium using a valve |
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| 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 |
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| 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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2013
- 2013-11-20 CN CN201310584115.5A patent/CN103629042B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644072A (en) * | 2013-12-13 | 2014-03-19 | 镇江大力液压马达股份有限公司 | Shell hole of cycloid hydraulic motor and machining method thereof |
| 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 |
| CN103671465A (en) * | 2014-01-17 | 2014-03-26 | 镇江大力液压马达股份有限公司 | Cycloid hydraulic motor output shaft and machining 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 |
| CN108916246A (en) * | 2018-09-20 | 2018-11-30 | 镇江大力液压马达股份有限公司 | A kind of output support device of cycloid hydraulic motor |
| CN114667406A (en) * | 2019-12-10 | 2022-06-24 | 舍弗勒技术股份两合公司 | Device for regulating the pressure of a flowing medium using a valve |
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| CN103629042B (en) | 2016-03-16 |
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