CN101260860B - Hydraulic motor - Google Patents
Hydraulic motor Download PDFInfo
- Publication number
- CN101260860B CN101260860B CN2008100606317A CN200810060631A CN101260860B CN 101260860 B CN101260860 B CN 101260860B CN 2008100606317 A CN2008100606317 A CN 2008100606317A CN 200810060631 A CN200810060631 A CN 200810060631A CN 101260860 B CN101260860 B CN 101260860B
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- distribution casing
- circular groove
- oil distribution
- distance
- ball
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Abstract
The invention relates to a hydraulic motor, which comprises an oil distribution casing (5), a crankshaft (3) and a piston (2) which are arranged inside a shell (1), wherein, the piston (2) can be adapted with a structure which drives the crankshaft (3) to rotate; and the oil distribution casing (5) is connected with one end of the crankshaft (3). The invention is characterized in that: a structure which can reduce the mutual friction between the oil distribution casing (5) and the inner wall of the shell (1) when the oil distribution casing (5) is rotated is arranged on the side face of the oil distribution casing (5). The hydraulic motor has the advantages that: the friction between the oil distribution casing on the crankshaft and the inner wall of the shell when the oil distribution casing is rotated is effectively reduced, thereby rotation of the crankshaft is driven to be more flexible and more convenient and the overall service life of the motor is improved; moreover, circular grooves are arranged on two side faces of a curved part of the crankshaft, and circular grooves are on the inner wall of the shell corresponding to the circular grooves on the curved part, and balls can be freely rolled and distributed inside the circular grooves, thereby the flexibility of rotation of the crankshaft is further improved.
Description
Technical field
The present invention relates to a kind of oil hydraulic motor production technical field.
Background technique
Existing a kind of patent No. is 03231170.2 and is called that the Chinese utility model patent of " crankshaft connecting rod type oil hydraulic motor " has proposed a kind of structure, its structure comprises and fixing logical food tray, protecgulum, the cover of plunger of the housing that has the hydraulic pressure runner, plunger-link assembly, bent axle and block bearing thereof and the oil distribution casing that is connected with bent axle one end in the housing, wherein between connecting rod and the crankshaft eccentric wheel roller and bearing housing are arranged, roller is installed in the roller slot of cartridge clip; The annular cartridge clip is half-and-half separately, or the split type cartridge clip of many five equilibriums, can be two-sided groove structure, also can be the single face groove structure.This model utility has reduced motor operation noise and energy consumption because the structure that has adopted cartridge clip to come the isolating metal roller makes crankshaft connecting rod type oil hydraulic motor metal roller in operation process can not produce sliding friction each other, has improved working life simultaneously.But its shortcoming is the pressure of this oil hydraulic motor reaches rating number or when above, just can't set up effective static pressure friction, thereby when causing oil distribution casing to rotate, easy and the inner walls generation critical friction in its bearing side, cause the working life of reducing oil hydraulic motor, when also having bent axle to rotate, the axial thrust load that bearing housing produces also produces mutual wearing and tearing with bent axle madial wall generation kinematic constraint and movement locus distortion easily; Also have, the pendulum angle pars contractilis that piston and bent axle are intrinsic and the surface of contact of housing are that cylndrical surface and surface of contact are bigger, also can have wear phenomenon, so its structure awaits to improve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of project organization rationally and the little oil hydraulic motor of friction when rotating mutually between oil distribution casing and the inner walls at above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above the technological scheme that is adopted: this oil hydraulic motor, include the oil distribution casing that places in the housing, crankshaft and piston, the structure that piston can drive crankshaft rotating fits in together, described oil distribution casing is connected with an end of bent axle, it is characterized in that: its bi-side of described oil distribution casing be provided with when oil distribution casing rotates can and inner walls between reduce the structure of friction mutually, the described structure that reduces friction mutually includes ball and ring cavity, described ring cavity is involuted by the circular groove on the corresponding inner walls with it of the circular groove of oil distribution casing side, described ball can freedom rollably be distributed in the ring cavity, and the diameter of ball is for greater than the bottom of circular groove on the distance of bottom to the portion of opening of circular groove on the oil distribution casing and the inner walls distance apart from addition to opening portion, but less than diameter of a circle that circular arc surrounds in the circular groove on the oil distribution casing.
As improvement, the bi-side of described its curved part of bent axle are provided with and reduce the structure of friction mutually respectively with between the corresponding bearing housing sidewall.
Improve again, the structure choice that described reduction rubs mutually is for including ball one and circular arc cavity, described circular arc cavity is involuted by the circular groove on the corresponding bearing housing sidewall with it of the circular groove of curved part side, described ball one can freedom rollably be distributed in the circular arc cavity, and the diameter of ball one is for greater than the bottom of circular groove on the distance of bottom to the portion of opening of circular groove on the curved part and the bearing housing sidewall distance apart from addition to opening portion, but is less than diameter of a circle that circular arc surrounds in the circular groove on the curved part.
Improve, its outer side surface of described piston is that cambered surface cooperates with movable contacting point on the inner walls again.
Compared with prior art, the present invention adopt its side of oil distribution casing be provided with when oil distribution casing rotates can and inner walls between reduce the structure of friction mutually.Like this advantage of project organization be oil distribution casing on the bent axle when rotating and the friction between the inner walls reduce effectively, make the rotation of bent axle more flexible, thereby improved the whole service life of motor; Also have, curved part bi-side at bent axle are provided with circular groove, and the corresponding inner walls with it of the circular groove on the curved part is provided with circular groove, described ball can freedom rollably be distributed in the circular groove, and this structure will further improve the flexibility that bent axle rotates; Having, is that cambered surface cooperates at oil cylinder two outer side surfaces with movable contacting point on the inner walls again, and the friction of oil cylinder and inner walls is also further reduced.So the present invention is a kind of very practical product, is worthy of popularization.
Description of drawings
Fig. 1 is the structure sectional view of the embodiment of the invention;
Fig. 2 is the figure that cooperates of oil cylinder and bent axle among Fig. 1;
Fig. 3 is the exploded view of oil distribution casing and ball among Fig. 1;
Fig. 4 is the enlarged view of I portion among Fig. 1;
Fig. 5 is the enlarged view of II portion among Fig. 1.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Extremely shown in Figure 5 as Fig. 1, the oil hydraulic motor of present embodiment includes the oil distribution casing 5, bent axle 3 and the piston 2 that place in the housing 1, and the structure that piston 2 can drive bent axle 3 rotations fits in together, described oil distribution casing 5 is connected with an end of bent axle 3, and can vertically rotate with bent axle 3.The bi-side of oil distribution casing 5 be provided with when oil distribution casing 5 rotates can and housing 1 inwall between reduce the structure of friction mutually.This structure that reduces friction mutually includes ball 4 and ring cavity, described ring cavity is involuted by the circular groove on corresponding housing 1 inwall with it of the circular groove 51 of oil distribution casing 5 sides, described ball 4 can freedom rollably be distributed in the ring cavity, and the diameter D of ball 4 for greater than the bottom of circular groove on the distance H of bottom to the portion of opening of circular groove 51 on the oil distribution casing 5 and the inner walls to the distance H addition of opening portion apart from 2H, but surround diameter of a circle 2R less than circular arc in the circular groove on the oil distribution casing 5 51.Is that cambered surface 21 cooperates at piston 2 outer side surfaces with movable contacting point on housing 1 inwall.Above-mentioned R represents radius distance, and 2R promptly is expressed as the diameter distance, and D represents diameter, and H represents crow flight distance.
As Fig. 1 and shown in Figure 5, bent axle 3 is provided with in the housing 1 rotationally by bearing 6, is provided with and reduces the structure of friction mutually respectively with between corresponding bearing housing 61 sidewalls in the bi-side of the curved part 31 of bent axle 3.The structure that this reduction rubs mutually is for including ball 1 and circular arc cavity, described circular arc cavity is involuted by the circular groove on the corresponding bearing housing sidewall with it of the circular groove of curved part 31 sides, described ball 1 can freedom rollably be distributed in the circular arc cavity, and the diameter D1 of ball 1 for greater than the bottom of circular groove on the distance H 1 of bottom to the portion of opening of circular groove on the curved part 31 and bearing housing 61 sidewalls to distance H 1 addition of opening portion apart from 2H1, circular arc surrounds diameter of a circle 2R1 in the circular groove on the curved part 31 but be less than.Above-mentioned R1 represents radius distance, and 2R1 promptly is expressed as the diameter distance, and D1 represents diameter, and H1 represents crow flight distance.
Claims (4)
1. oil hydraulic motor, include the oil distribution casing (5), bent axle (3) and the piston (2) that place in the housing (1), the structure that piston (2) can drive bent axle (3) rotation fits in together, described oil distribution casing (5) is connected with an end of bent axle (3), it is characterized in that: its bi-side of described oil distribution casing (5) be provided with when oil distribution casing (5) rotates can and housing (1) inwall between reduce the structure of friction mutually; The described structure that reduces friction mutually includes ball (4) and ring cavity, described ring cavity is involuted by the circular groove on the corresponding housing with it of circular groove (51) (1) inwall of oil distribution casing (5) side, described ball (4) can freedom rollably be distributed in the ring cavity, and the diameter (D) of ball (4) is the distance (2H) greater than distance (H) addition at bottom to the opening portion center of circular groove on the distance (H) of bottom to the portion of opening of the last circular groove (51) of oil distribution casing (5) and the inner walls, but less than diameter of a circle that circular arc surrounds (2R) in the circular groove (51) on the oil distribution casing (5).
2. oil hydraulic motor according to claim 1 is characterized in that: the bi-side of its curved part of described bent axle (3) (31) are provided with and reduce the structure of friction mutually respectively with between the corresponding bearing housing sidewall.
3. oil hydraulic motor according to claim 2, it is characterized in that: the structure that described reduction rubs mutually is for including ball one (41) and circular arc cavity, described circular arc cavity is involuted by the circular groove on the corresponding bearing housing sidewall with it of circular groove of curved part (31) side, described ball one (41) can freedom rollably be distributed in the circular arc cavity, and the diameter (D1) of ball one (41) is the distance (2H1) of distance (H1) addition at bottom to the opening portion center of circular groove on the distance (H1) of bottom to the portion of opening of going up circular groove greater than curved part (31) and bearing housing (61) sidewall, but is less than diameter of a circle that circular arc surrounds (2R1) in the circular groove on the curved part (31).
4. according to claim 1,2 or 3 described oil hydraulic motors, it is characterized in that: its outer side surface of described piston (2) is that cambered surface (21) cooperates with movable contacting point on housing (1) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100606317A CN101260860B (en) | 2008-04-15 | 2008-04-15 | Hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100606317A CN101260860B (en) | 2008-04-15 | 2008-04-15 | Hydraulic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101260860A CN101260860A (en) | 2008-09-10 |
| CN101260860B true CN101260860B (en) | 2010-11-03 |
Family
ID=39961502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100606317A Expired - Fee Related CN101260860B (en) | 2008-04-15 | 2008-04-15 | Hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101260860B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606379B (en) * | 2011-06-16 | 2014-08-06 | 兰州理工大学 | Offset type radial plunger motor of six-star single-action piston cylinder |
| CN111664049B (en) * | 2020-05-13 | 2022-06-10 | 佛山市海战力工程设备有限公司 | Pressure self-balancing radial plunger hydraulic motor oil distribution structure |
-
2008
- 2008-04-15 CN CN2008100606317A patent/CN101260860B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101260860A (en) | 2008-09-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20140415 |