CN103644072A - Shell hole of cycloid hydraulic motor and machining method thereof - Google Patents
Shell hole of cycloid hydraulic motor and machining method thereof Download PDFInfo
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- CN103644072A CN103644072A CN201310676190.4A CN201310676190A CN103644072A CN 103644072 A CN103644072 A CN 103644072A CN 201310676190 A CN201310676190 A CN 201310676190A CN 103644072 A CN103644072 A CN 103644072A
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- body shell
- hydraulic motor
- oil groove
- eccentric
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Abstract
The invention relates to a shell hole of a cycloid hydraulic motor and a machining method thereof, belonging to the technical field of mechanical transmission. The shell hole and an output shaft are assembled and matched, wherein an output shaft body consists of a major diameter section which is positioned inside a shell of the cycloid hydraulic motor after being assembled and a minor diameter which protrudes out of the shell; an inner hole of the major diameter section is provided with an engaging structure which is in transmission with a universal driving shaft of the hydraulic motor, the surface of the excircle of the major diameter section is provided with a movable fit part of a shell inner hole, the movable fit part of the shell inner hole is provided with at least two circumferential intermittent oil grooves; the bottom of each intermittent oil groove is formed by the center of a circle and an eccentric segmental arc of the center of the excircle of the movable fit part, which deviates for a process eccentric distance, and the radius of the eccentric segmental arc is smaller than that of an inner hole of the movable fit part. Due to the adoption of the shell hole, the formation of a pressure oil film is facilitated, the radial-stress supporting capacity is improved, and the lubrication and the sealing are ensured.
Description
Technical field
The present invention relates to a kind of body shell hole, especially a kind of cycloid hydraulic motor body shell hole also relates to its processing method simultaneously, belongs to mechanical transmissioning technology field.
Background technique
Cycloid hydraulic motor is a kind of low-speed big torque motor, there is the advantages such as volume is little, specific power density is large, efficiency is high, speed range is wide, thereby be widely applied, especially axle flow oil hydraulic motor, due to simple in structure, cost is low, very applicable pressure rating is low, cost performance requires high occasion.In order to guarantee the lubricated of axle flow-distributing valve and to form desirable flow oil film and sealing reliably, its output shaft is provided with circumferential annular oil groove, but the oil groove of this structure is unfavorable for radially bearing capacity of output shaft.
Summary of the invention
The object of the invention is to: the problem existing for above-mentioned prior art, pass through architecture advances, propose to be a kind ofly conducive to guarantee radially bearing capacity, and the line oil hydraulic motor body shell hole that processing technology is easy, seal lubrication is effective, its processing method provided simultaneously.
In order to achieve the above object, cycloid hydraulic motor body shell of the present invention has body shell hole, described body shell hole coordinates with output shaft assembling, and described output shaft body consists of the path section that is positioned at the large footpath section of cycloid hydraulic motor body shell after assembling and stretch out outside described body shell; The endoporus of described large footpath section has and oil hydraulic motor couple axle transmission meshing engagement structure, and its outer round surface has and described body shell endoporus dynamic matching postion, and described body shell endoporus 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 less than the radius of described dynamic matching postion endoporus.
Described technique throw of eccentric, according to the eccentric segmental arc radius of setting, interruption oil groove maximum depth and dynamic matching postion radius, is determined by following formula:
e=R+h-r
In formula
E---technique throw of eccentric (mm)
R---dynamic matching postion radius (mm)
H---be interrupted oil groove maximum depth (mm)
R---eccentric segmental arc radius (mm).
The radius R of above-mentioned technique eccentric distance e and body shell hole dynamic matching postion, is not difficult, according to corresponding geometrical relationship, to set up system of equations and obtain to central angle and eccentric segmental arc radius r according to the interruption oil groove maximum depth h setting and the outer arc length l of oil groove or this arc length institute.
The oil groove cross section structure of described interruption can be triangle or semicircle or U-shaped.
Can carry out according to the following steps the man-hour that adds of like this, being interrupted oil groove:
The first step, the position by body shell with its axis runout turning rolling clamp gyration center technique throw of eccentric are clamped on turning rolling clamp;
Second step, order about turning rolling clamp rotation;
After the 3rd step, lathe tool contact main shaft body, according to the feed of maximum oil groove depth, process required first paragraph and be interrupted oil groove;
The 4th step, in the situation that keeping technique throw of eccentric, body shell body is rotated afterwards and is clamped by the angular position of adjacent interruption oil groove relative to the angular position of described rolling clamp, by above second step and the identical operation of the 3rd step, process follow-up interruption oil groove.
Adopt after the present invention, avoided body shell hole 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), can go out required oil groove by car, oil groove at the bottom of the eccentric arc that the present invention reduces gradually to the two ends degree of depth in the middle of adopting and the low even depth oil groove of concentric arcs that do not adopt routine to expect, 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 main shaft body dynamic matching postion, ooze defeated, and then spread to both sides, thereby form better oil film, guarantee lubricated and sealing.Adopt the present invention's processing oil groove on body shell hole to compare in effectiveness and have superiority with processing oil groove on output shaft, because the body shell hole of cycloid hydraulic motor is fixed, be conducive to oil groove mineralization pressure oil film, and output shaft rotates.
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.
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, turn stator pair 14, bonnet 15, plug screw 16, rubber cushion 17, steel plate washer 18, bolt 19, couple axle 20, back-up ring 21, O type circle 22, plane bearing 23, front back-up ring 24.
Fig. 2 is the dynamic matching postion inner hole structure schematic diagram of body shell in Fig. 1 embodiment.
Fig. 3 is the middle oil-break groove relevant parameter geometrical relationship figure that shown in Fig. 2 dynamic matching postion arrow, direction is dissectd.
embodiment one
As shown in Figure 1, as shown in Figure 2, its output shaft 1 body consists of the path section that is positioned at the large footpath section of cycloid hydraulic motor body shell 10 after assembling and stretch out outside described body shell body shell 10 wherein the cycloid hydraulic motor of the present embodiment.In path section, be shaped with keyway, to connect transferring power and motion by key.The endoporus of large footpath section has the internal spline meshing engagement structure with 20 transmissions of oil hydraulic motor couple axle, if need to bear large radial force, forward and backward radial needle bearing can be installed respectively in section outer round surface two ends, the large footpath of output shaft, and need it forward and backwardly to there is necking segment, front bottleneck is installed front radial needle bearing, close with output shaft path section, front necking segment is resisted against on plane needle bearing back-up ring, front radial needle bearing length is greater than rear needle bearing length, is conducive to shaft extension and bears larger radial force.As shown in Figure 2, body shell 10 has three sections of circumferential uniform interruption oil groove 2-2-2 with the large footpath section dynamic matching postion 2-2-1 of output shaft 1.Each bottom land that is interrupted oil groove 2-2-2 is departed from the eccentric segmental arc formation of technique eccentric distance e by center of circle O ' and the center of circle O of dynamic matching postion 2-2-1 cylindrical, the radius r of this bias segmental arc is less than the radius R of dynamic matching postion 2-2-1 cylindrical.Obviously, e=R+h-r; E---technique throw of eccentric (mm); R---dynamic matching postion radius (mm); H---be interrupted oil groove maximum depth (mm), be generally 0.35mm to 0.9mm; R---eccentric segmental arc radius (mm), the radius of different series oil hydraulic motor dynamic matching postion radius is different, and for example BMP, BMR series is definite value 21mm to 21.5mm.
During design, the radius R of dynamic matching postion, the outer arc length l(that is interrupted oil groove or its institute are to central angle A, conventionally between 30 ° to 65 °), maximum depth h is all consistent with the dark oil groove such as at the bottom of the circumferential interval of existing design, concentric arcs, according to mathematics general knowledge such as the cosine laws, be not difficult to find out geometrical relationship each other by Fig. 3, set up technique eccentric distance e and radius r that system of equations solve eccentric segmental arc.
Add man-hour, carry out according to the following steps:
The first step, body shell hole body 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 the body of Lathe tool tip contact shell hole, according to maximum oil groove depth feed cutting, can process first paragraph and be interrupted oil groove;
The 4th step, in the situation that keeping technique throw of eccentric, body shell hole body 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.
Facts have proved, the output shaft of the present embodiment compared with prior art, has following remarkable advantage:
1) oil groove is that circumferential interval arranges, and the radial support face in body shell hole is not cut off by oil groove, is conducive to wedge-shaped oil film and forms, and therefore contributes to guarantee radially bearing capacity;
2) compare with even depth oil groove, be more conducive to hold oil and from the cylindrical section between the adjacent oil groove of Xiang Tike hole, oil groove two ends body dynamic matching postion, ooze defeatedly, be conducive to form oil film, guarantee lubricated and sealing;
3) processing of oil groove can adopt special tooling, convenience and high-efficiency, and quality easily guarantees.
In addition to the implementation, the present invention can also have other mode of executions.For example, the cross section of being interrupted oil groove is the swallow-tail form of mouthful narrow bottom width, can, keeping as far as possible enough moving under the prerequisite of matching surface, fully hold oil like this.Add man-hour, adopt copying turning tool, according to after the feed of maximum oil groove depth, then feed vertically can process required swallow-tail form and is interrupted oil groove.Therefore the present invention, for expanding the structural change of oil groove according to design, as different series cycloid hydraulic motor has not consubstantiality shell hole dynamic matching postion radius, lays a good foundation.
Claims (6)
1. a cycloid hydraulic motor body shell hole, described body shell hole coordinates with output shaft assembling, and described output shaft body consists of with the path section of stretching out outside described body shell the large footpath section that is positioned at cycloid hydraulic motor body shell after assembling; The endoporus of described large footpath section has and oil hydraulic motor couple axle transmission meshing engagement structure, and its outer round surface has and described body shell endoporus dynamic matching postion, it is characterized in that: described body shell endoporus 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 less than the radius of described dynamic matching postion endoporus.
2. cycloid hydraulic motor body shell according to claim 1 hole, is characterized in that: described technique throw of eccentric according to the eccentric segmental arc radius of setting, be interrupted oil groove maximum depth and dynamic matching postion radius, definite by following formula:
e=R+h-r
In formula
E---technique throw of eccentric (mm)
R---dynamic matching postion radius (mm)
H---be interrupted oil groove maximum depth (mm)
R---eccentric segmental arc radius (mm).
3. cycloid hydraulic motor body shell according to claim 1 hole, it is characterized in that: forward and backward radial needle bearing is installed respectively at section outer round surface two ends, the large footpath of described output shaft, front necking segment is resisted against on plane needle bearing back-up ring, and the length of front radial needle bearing is greater than the length of rear needle bearing.
4. cycloid hydraulic motor body shell according to claim 1 hole, is characterized in that: the oil groove cross section structure of described interruption can be triangle or semicircle or U-shaped.
5. according to the arbitrary described cycloid hydraulic motor body shell hole forming method of claim 1 to 4, it is characterized in that comprising the following steps:
The first step, the position by body shell with its axis runout turning rolling clamp gyration center technique throw of eccentric are clamped on turning rolling clamp;
Second step, order about turning rolling clamp rotation;
After the 3rd step, lathe tool contact main shaft body, according to the feed of maximum oil groove depth, process required first paragraph and be interrupted oil groove;
The 4th step, in the situation that keeping technique throw of eccentric, body shell body is rotated afterwards and is clamped by the angular position of adjacent interruption oil groove relative to the angular position of described rolling clamp, by above second step and the identical operation of the 3rd step, process follow-up interruption oil groove.
6. cycloid hydraulic motor body shell hole forming method according to claim 5, is characterized in that: described rolling clamp is four jaw chuck.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310676190.4A CN103644072B (en) | 2013-12-13 | 2013-12-13 | A kind of shell hole of cycloid hydraulic motor and processing method thereof |
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| CN201310676190.4A CN103644072B (en) | 2013-12-13 | 2013-12-13 | A kind of shell hole of cycloid hydraulic motor and processing method thereof |
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| CN103644072B CN103644072B (en) | 2016-02-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2008004983A1 (en) * | 2006-07-07 | 2008-01-10 | Nanyang Technological University | Revolving vane compressor |
| 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 |
| CN103629042A (en) * | 2013-11-20 | 2014-03-12 | 镇江大力液压马达股份有限公司 | Shaft valve flow distribution cycloid hydraulic motor |
| CN203627077U (en) * | 2013-12-13 | 2014-06-04 | 镇江大力液压马达股份有限公司 | Cycloid hydraulic motor body shell hole |
-
2013
- 2013-12-13 CN CN201310676190.4A patent/CN103644072B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2008004983A1 (en) * | 2006-07-07 | 2008-01-10 | Nanyang Technological University | Revolving vane compressor |
| 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 |
| CN103629042A (en) * | 2013-11-20 | 2014-03-12 | 镇江大力液压马达股份有限公司 | Shaft valve flow distribution cycloid hydraulic motor |
| CN203627077U (en) * | 2013-12-13 | 2014-06-04 | 镇江大力液压马达股份有限公司 | Cycloid hydraulic motor body shell hole |
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| CN103644072B (en) | 2016-02-17 |
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