CN205618296U - Radial plunger hydraulic motor of big moment of torsion of intermediate speed - Google Patents
Radial plunger hydraulic motor of big moment of torsion of intermediate speed Download PDFInfo
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- CN205618296U CN205618296U CN201620327732.6U CN201620327732U CN205618296U CN 205618296 U CN205618296 U CN 205618296U CN 201620327732 U CN201620327732 U CN 201620327732U CN 205618296 U CN205618296 U CN 205618296U
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Abstract
The utility model relates to a radial plunger hydraulic motor of big moment of torsion of intermediate speed, including casing (1), bent axle (2), roller (3), bearing housing (4) and cylinder cap (5), along bearing housing (4) radial distribution and go up telescope tube (6) that the lower extreme offseted with spherical outside surface (402) of spherical outside surface (501) and bearing housing (4) of cylinder cap (5) respectively, all the time, retaining ring (7) of hugging closely the lower extreme of telescope tube (6) outside bearing housing (4) sphere (402), all the time, hug closely the upper end of telescope tube (6) in peg (8) of cylinder cap spherical outside surface (501), both ends are respectively with bent axle (2) with join in marriage transmission shaft (10) that oily mechanism (9) is connected, roller (3) endotheca is in hole (401) of bearing housing (4), bent axle (2) are including eccentric shaft part (201). Compared with the prior art, this radial plunger hydraulic motor has can show the advantage that improves rotational speed and compact structure.
Description
Technical field
This utility model relates to technical field of hydraulic elements, specifically a kind of middling speed high pulling torque radial plunger type motor.
Background technology
Radial plunger type motor typical construction is plunger along drive shaft is radial distribution, plunger motion plane with
Drive shaft is vertical, and its remarkable advantage is that discharge capacity is big, and moment of torsion is big, directly band dynamic load can start, be particularly suitable for low-speed big
Application scenario.
But, actually used on market today showing, common radial plunger type motor uses rotating speed less than 300r/
min.By hydraulic motor industry with 500r/min as boundary, will be above 500r/min and be classified as high-speed motor, be classified as less than 500r/min
Zero motor sanctified by usage from the viewpoint of, on market today sell radial plunger type motor major part should be classified as low speed
High pulling torque radial plunger type motor, the high-speed motor higher than 500r/min is the axial plunger piston hydraulic horse that moment of torsion is less than normal mostly
Reach, it is generally required to could band dynamic load be started by deceleration link.Along with the progress of science and technology, market occurs in that turn up 300
～1000r/min, corresponding discharge capacity 4000～200mL/r, can middling speed high-torque hydraulic motor that directly bringing onto load starts vigorous
Demand.
From above-mentioned to hydraulic motor simple analysis, can meet the startup of middling speed high pulling torque direct bringing onto load can only be footpath
To piston structure, and the most all kinds of low-speed big radial plunger type motor is along with the raising of use rotating speed, all can occur each
The problem planting various kinds, it is impossible to meet and use requirement, even if there being the hydraulic motor that can deserve to be called individually middling speed high pulling torque to there is also respectively
Plant defect.
Fig. 1 and Fig. 2 is that the structure of a kind of crankshaft connecting low-speed big radial plunger type motor of prior art is shown
Being intended to, its structural representation can be indicated in the catalog of relevant manufacturers.Including housing 1, protecgulum 2, bent axle 3, roller 4, bearing
Seat 5, connecting rod 6, retaining ring 7, piston 8, cylinder cap 9, oil distribution mechanism 10.Bent axle 3, roller 4, bearing block 5 constitutes a roller bearing knot
Structure, connecting rod 6 is rigidly connected on bearing block 5 external cylindrical surface 501 by each retaining ring 7 in both sides, and the bulb 602 of connecting rod 6 sets
Being placed in the ball-and-socket 801 of piston 8, piston 8 is arranged in the Cylinder inner bore 901 of cylinder cap 9.During work, oil distribution mechanism is by hydraulic oil
(not noting in figure) is assigned to each cavity volume surrounded by piston 8 and cylinder cap 9 inner chamber 902 successively, and hydraulic oil promotes piston 8 at cylinder cap
Slide downward in the Cylinder inner bore 901 of 9, the piston 8 of slide downward promotes connecting rod 6 to move downward, while connecting rod 6 moves downward
The centre of sphere around its bulb 602 swings along the axis x direction being perpendicular to bent axle 3 and promotes bent axle 3 to revolve through bearing block 5, roller 4
Turn.Crankshaft connecting low-speed big radial plunger type motor low price, is applied widely in speed operation field,
It is one of yield is maximum in the world low speed high torque hydraulic motor, but along with the raising of rotating speed, the hydraulic pressure horse of this version
Reach and there is following shortcoming:
1, the outer surface 501 of bearing block 5 is a face of cylinder, with the inner concave of the connecting rod 6 that bearing block 5 face of cylinder 501 coordinates
603 is still the face of cylinder, and between the face of cylinder, laminating can not retrain along cylinder axis direction, i.e. the degree of freedom in axle y direction.Therefore, with
The raising of working speed, the stationkeeping ability of connecting rod 6 is poor, poor stability.
2, connecting rod 6 and retaining ring 7 are entirely being rigidly connected of mechanical component, groove 601 and the retaining ring endoporus of connecting rod 6
There is gap between 701, along with the raising of rotating speed, centrifugal force increases, there is mechanical impact between connecting rod 6 and retaining ring 7, produces
Noise.
3 as in figure 2 it is shown, along with connecting rod 6 swings along the axis x direction being perpendicular to bent axle 3 around the centre of sphere of its bulb 602, connect
There is the angle of cut θ of mechanical periodicity in the axis m of the bar 6 and axis n of piston 8, piston 8 exists periodic side force, this side force
The Cylinder inner bore 901 making cylinder cap 9 produces irregular abrasion, and after abrasion, circle becomes oval, as it is shown on figure 3, rotating speed is more
Height, the highest oval abrasion of pressure is the most serious.
4, from the characteristics of motion of above-mentioned connecting rod 6, connecting rod 6 has the ripple by the change of cosine rule to the motive force of bent axle 3
Dynamic, i.e. motive force is equal to Fcos θ, and wherein F little is together decided on by piston 8 diameter and hydraulic oil pressure are powerful, it follows that bent axle 3
There is fluctuation in output moment of torsion.
5, in addition to the defect in said structure principle, the motor of this version there is also technologic deficiency.On bent axle 3
Arrange two for retraining the roller 4 step 301 along axle y direction degree of freedom, the range arm between 302, two steps 301 and 302
Very little tolerance and surface smoothness all have higher requirement, bring inconvenience to processing, and in like manner, the step 502,503 of bearing block 5 is also
Inconvenience is brought to processing.
Fig. 4 is Calzoni company of Italy utility model, and Shuande, Foshan favorite hydraulic pressure company limited obtains its production permit
The structural representation of a kind of slip expansion pendulum cylinder-type low-speed big radial plunger type motor of prior art, including housing
1, protecgulum 2, bent axle 3, oil cylinder 4, piston 5, spring 6, cylinder cap 7, spring cup 8, spring base 9, oil distribution mechanism 10.Bent axle 3, cylinder cap 7
It is respectively equipped with spherical outside surface 301,701, oil cylinder 4, piston 5 is respectively equipped with Internal Spherical Surface 401,501.Spring 6 is by spring base 9, spring
Lid 8 is respectively by the spherical outside surface of the Internal Spherical Surface 401 of oil cylinder 4 and the spherical outside surface 301 of bent axle 3 and the Internal Spherical Surface 501 of piston 5 with cylinder cap 7
701 are adjacent to.Oil cylinder 4 and piston 5 coaxial cooperation, cooperation axis is y, constitute one be only capable of along axis y do telescopic slide and with axle
Around the centre of sphere O of cylinder cap 7 sphere 701 in line x vertical plane1The telescopic oscillating tube-in-tube structure swung.Cylinder cap 7, piston 5, oil cylinder 4,
Bent axle 3 constitutes a sealed volume, and during work, oil distribution mechanism 10 hydraulic oil being assigned to successively enters this sealed volume, cavity volume bag
The hydraulic pressure oil column enclosed pushes directly on bent axle 3 and rotates.Bent axle 3 rotates a circle, and stretches once between oil cylinder 4 and piston 5, and spring 6 is also
Follow and stretch once.Compared with above-mentioned crankshaft connecting low-speed big radial plunger type motor, slip expansion pendulum cylinder-type is low
Speed high pulling torque radial plunger type motor has an obvious advantage:
1, between oil cylinder 4 and piston 5 only along the flexible of axis y and with axis x vertical plane in around cylinder cap 7 sphere
The centre of sphere O of 7011The telescopic oscillating motion swung, oil cylinder 4 remains coaxial with piston 5, the most there is not side force,
This means to there is not oval abrasion.
2, hydraulic oil pushes directly on bent axle 3 and rotates, and thrust size is together decided on, no by piston 5 diameter and hydraulic oil pressure
There is power and torsion that crankshaft connecting low-speed big radial plunger type motor causes because of the inherent character of organisation conversion principle
The fluctuation of square.
But along with the raising of rotating speed, the slip expansion pendulum cylinder-type low-speed big radial plunger liquid of prior art shown in Fig. 4
Pressure motor still suffers from following shortcoming:
1, as the above analysis, bent axle 3 rotates a circle, and spring 6 is flexible, and once rotating speed is the highest, and spring 6 stretching frequency is more
Height, the easiest fatigue fracture, therefore, spring 6 has become one of bottleneck improving motor rotary speed.
2, stretching along with spring 6, the contact stress generating period between oil cylinder 4 and bent axle 3, between piston 5 and cylinder cap 7
Property change, from contact mechanics knowledge, it is tired that alternation contact stress is easier to make contact surface produce than Static Contact stress
Destroy.
3, a sliding friction pair is formed between oil cylinder Internal Spherical Surface 401 and bent axle spherical outside surface 301, from tribology principle,
The material wear-resistant limit is restricted by PV value between friction pair, and wherein P is the normal pressure between friction pair, and V is between friction pair
Relative sliding velocity.Along with the raising of rotating speed, V increases therewith, abrasion aggravation, and therefore friction pair abrasion is to improve this version
The bottleneck that motor rotary speed is the most serious.
For the shortcoming of above-mentioned slip expansion pendulum cylinder-type low-speed big radial plunger type motor, relevant manufacturers is carried out
Various improvement:
The application publication number that on February 4th, 2015 announces is that CN104329217A discloses a kind of flexible pendulum cylinder-type hydraulic pressure horse
Reaching and eccentric shaft sphere processing method, this utility model passes through process means, processes tiny liquid storage on bent axle sphere
Hole is to improve its self-lubricating property, though friction can be reduced to a certain extent, improves rotating speed, but slides between oil cylinder and bent axle sphere
The physics fact of friction does not change, and is still restricted by friction pair PV value.
The application publication number that on April 3rd, 2013 announces is that CN103014587A discloses one in the spraying of Crankshaft fever sensation of the face
The method of molybdenum coating, this utility model is by spraying layer of metal coating on bent axle sphere, to increase its self lubricity and resistance to
Mill property, the method obtains good effect on huge discharge (3600ml/r and more than) hydraulic motor, but and above-mentioned
The utility model method that CN104329217A announces is the same, and the physics fact of sliding friction between oil cylinder and bent axle sphere does not change
Become, still restricted by friction pair PV value, still cannot be competent at middling speed operating mode.
American documentation literature US5967018 discloses a solution, such as Fig. 5.Arrange between cylinder cap 1 and bent axle 2
A set of radial expansion sleeve 3, extension sleeve 3 is containing oil cylinder 4. and piston 5, and oil cylinder 4 and piston 5 respectively arrange an Internal Spherical Surface, cylinder cap 1 He
Bent axle 2 respectively arranges a spherical outside surface；Spring 6 applies elastic force to oil cylinder 4, makes oil cylinder 4 Internal Spherical Surface be adjacent to bent axle 2 spherical outside surface；Spring 7
Piston 5 is applied elastic force, makes piston 5 Internal Spherical Surface be adjacent to cylinder cap 1 spherical outside surface；Spring 6 and spring 7 not with bent axle 2 rotation and
Change decrement, therefore constant to the pretightning force of contact surface, improve the force-bearing situation of contact surface correlated parts, it is to avoid along with
There is fatigue fracture and aggravation sphere abrasion phenomenon in the raising spring of rotating speed.But the program still suffers from following shortcoming:
1, spring 6 and spring 7 are arranged at the periphery of extension sleeve 3, add motor dimension, especially significantly increase
The size of cylinder cap 1.
2 is the same with aforementioned schemes, and between oil cylinder 4 and bent axle 2 sphere, the physics fact of sliding friction does not change, still
Restricted by friction pair PV value, still cannot be competent at middling speed operating mode.
American documentation literature US7267042B2 is disclosed another kind of solution party after american documentation literature 5967018
Case, such as Fig. 6.The spring that american documentation literature 5967018 is arranged at outside piston is moved to internal piston by the program, by hanging
The components such as bar, peg ring carry out pretension to spring, decrease motor dimension, but during motor running, oil cylinder and bent axle contact surface institute
The friction pair of composition is still sliding friction pair, it is impossible to competent middling speed operating mode.
Fig. 7 is the structural representation of a kind of pendulum cylinder-type high pulling torque radial plunger type motor that Sai company of Italy produces,
Including bent axle 1, roller 2, bearing holder (housing, cover) 3, tilt cylinder 4, piston 5, retaining ring 6, butterfly spring 7, procapsid 8, back casing 9, oil distributor
Structure 10 etc..Tilt cylinder 4 is supported in procapsid 8 and back casing 9 hole by two gudgeons 401,402, and during work, tilt cylinder 4 is around gudgeon
401,402 swing, and piston 5 only does relative stretching motion, thus eliminates the piston 5 lateral pressure to tilt cylinder 4 with tilt cylinder 4,
Reduce friction, eliminate oval wear phenomenon, improve mechanical efficiency.Roller bearing structure is used to become above-mentioned between piston 5 and bent axle 1
The sliding friction of link-type and slip expansion pendulum cylinder-type motor is rolling friction, is substantially reduced frictional force and caloric value.Bearing holder (housing, cover) 3
Two ends respectively arrange a butterfly spring 7, and butterfly spring 7 applies elastic force to retaining ring 6, and retaining ring 6 buckles the groove at piston 5
On, prevent piston 5 from departing from bearing holder (housing, cover) 3.Piston 5 and bearing holder (housing, cover) 3 are sphere-contact, improve centering and stability.This knot
Configuration formula motor obtains in middling speed field and preferably applies effect, but still there is following shortcoming:
1, tilt cylinder gudgeon in being supported in forward and backward housing swings, and oscillation center is in enclosure interior, and pendulum radius is little, according to
Chen Zhuoru professor analyzes at its monograph " low speed high torque hydraulic motor Design Theory and calculating ", and pendulum radius is the least, and motor is turned round
Square and speed ripple are the biggest.
2, gudgeon is cantilever beam structure, there is bending stress, and mechanical characteristic is bad.
3, for the contact stress of less tilt cylinder gudgeon, trunnion diameter is relatively big, and weight is big, adds tilt cylinder movement inertia, turns
Speed is the highest, and its negative effect is the biggest.
4, internal piston arranges a damping hole, the thin-wall construction of piston non-fully hollow, and weight is big, and its shortcoming is the most above-mentioned
Shortcoming 3.
5, arranging two cantilever trunnion on column type tilt cylinder, the axiality of two gudgeons, fineness, case hardness all have relatively
High requirement, therefore processing technology is bad.
6, the spring to retaining ring offer elastic force is butterfly spring, though compacter than helical spring, but still have the space of improvement,
Motor dimension can be made more compact.
American documentation literature US8206130B2 discloses a kind of radial plunger type motor with high speed capability, its
The pendulum cylinder-type high pulling torque radial plunger type motor that population structure produces to above-mentioned Sai company with operation principle is similar, at gudgeon
If offering dry sump on, gudgeon carries out forced feed lubrication, also offered lubrication groove simultaneously on oil distribution casing, described two measures change
It is apt to friction lubricating characteristic.But structure as shown in Figure 7 above, trunnion configuration inherent defect does not change, and oil distribution mechanism is not
Possesses automatic compensation ability.
Utility model content
The technical problems to be solved in the utility model is: for the defect of prior art, it is provided that a kind of middling speed high pulling torque
Radial plunger type motor.
The technical solution of the utility model is achieved in that a kind of middling speed high pulling torque radial plunger type motor, including
Housing, external output speed and the bent axle of moment of torsion, be placed on the interior of bearing holder (housing, cover) in being coated at the roller of eccentric shaft part of bent axle, roller
In hole, radially star uniform be anchored on housing cylinder cap, along bearing block radial distribution and upper and lower side respectively with the spherical outside surface of cylinder cap
The extension sleeve that offsets with the spherical outside surface of bearing holder (housing, cover), the holding of the spherical outside surface that the lower end of extension sleeve is close to all the time bearing holder (housing, cover)
Ring, the upper end of extension sleeve is close to what the peg of cylinder cap spherical outside surface, two ends were connected with bent axle and oil distribution mechanism respectively all the time
Power transmission shaft.Described extension sleeve comprises oil cylinder and piston, described oil cylinder and described piston coaxial and coordinates, and axis z passes through cylinder all the time
The centre of sphere O of the spherical outside surface of lid1Centre of sphere O with the spherical outside surface of bearing holder (housing, cover)2, during work, oil cylinder and piston along z-axis stretching motion and around
The centre of sphere O of the sphere of cylinder cap1Swing.Described bent axle, roller, bearing holder (housing, cover) constitute a rolling bearing structure.Also include retaining ring, guarantor
Hold ring-shaped pressuring plate, the elastic rubber ring being arranged between retaining ring and retaining ring pressing plate, be close to retaining ring pressing plate and be fastened in institute
Stating the circlip in bearing holder (housing, cover) groove, the spherical outside surface of the Internal Spherical Surface of oil cylinder with bearing holder (housing, cover) is adjacent to by described circlip；Also wrap
Include pallet, self-locking nut, peg, peg ring, butterfly spring, spring base, circlip, described pallet, self-locking nut, peg,
Piston Internal Spherical Surface is adjacent to by peg ring, butterfly spring, spring base, circlip with cylinder cap spherical outside surface；Also include oil distribution mechanism, institute
Stating oil distribution mechanism and include oil-distributing plate, oil distribution casing, floating ring, butterfly spring, bonnet, one end power transmission shaft hinged with bent axle is through shell
Body and the oil-distributing plate other end are hinged with oil distribution casing, and during work, bent axle, power transmission shaft, oil distribution casing synchronize to revolve forward or backwards around axle x
Turning, floating ring is directly pressed on oil distribution casing by one end and the bonnet butterfly spring that the other end and floating ring offset that offsets, and then
Indirectly oil distribution casing is pressed on oil-distributing plate, plays initial sealing and wear-compensating effect, i.e. between floating ring and oil distribution casing
Or after abrasion occurring between oil distribution casing and oil-distributing plate, under the elastic force effect of butterfly spring, between floating ring and oil distribution casing, join oil
Remain in that between dish and oil-distributing plate and be adjacent to.Two ends, described bearing holder (housing, cover) left and right are respectively and between the step surface of housing and protecgulum left side
Gap offsets, i.e. bearing holder (housing, cover) is retrained along the degree of freedom in axle y direction by described step surface and described left side, but bearing holder (housing, cover) again can be with
Bent axle rotates freely around axle x together.
Further, the described oil cylinder external diameter near Internal Spherical Surface one end arranges a groove, and the diameter A of described groove compares oil cylinder
Internal diameter B is smaller.
Further, the diameter A of described groove approximates 0.8～0.85 with the ratio of oil cylinder internal diameter B, the truncated-spherical chi of oil cylinder
The ratio of very little C and the diameter A of groove is not less than 0.5.
Further, truncated-spherical size C of described oil cylinder is 0.7～0.8 with the ratio of the diameter A of groove.
Further, described piston is set to hollow and thin-walled column structure.
Further, the eccentric shaft part left end of described bent axle arranges one around the convex annular step of axle y.
Further, the eccentric shaft part of described bent axle arranges 2-4 road compensating groove.
Further, the endoporus of described bearing holder (housing, cover) is set to one without the unthreaded hole on boss rank.
Further, the endoporus of described bearing holder (housing, cover) arranges 2 road compensating grooves.
Further, an elastic rubber ring is set between described retaining ring and retaining ring pressing plate and places elastic rubber ring
Groove, groove both may be disposed in retaining ring, it is possible to is arranged on retaining ring pressing plate.
Further, the elastic rubber ring material being arranged between retaining ring and retaining ring pressing plate is nitrile rubber, elastic
Rubber ring cross section can be circular, square, star or other shape.
Further, described retaining ring arranges an endoporus, and retaining ring pressing plate arranges a boss, the endoporus of retaining ring and holding
The boss of ring-shaped pressuring plate coordinates, and coordinating axis is axle y.
Further, the periphery of described oil cylinder lower end, the periphery of the one end that i.e. offsets with spheric seat arranges a groove, retaining ring
It is fastened on the groove that oil cylinder lower end is peripheral, by retaining ring, the gum elastic that is arranged between retaining ring and retaining ring pressing plate
Circle, retaining ring pressing plate, be close to retaining ring pressing plate and the circlip that is fastened in bearing holder (housing, cover) groove by the Internal Spherical Surface of oil cylinder with
The spherical outside surface of bearing holder (housing, cover) is adjacent to.
Further, described piston inner hole arranges a ring-shaped step, by the pallet offseted with ring-shaped step, with peg
The self-locking nut of threaded engagement, peg, peg ring, butterfly spring, spring base, circlip are by piston Internal Spherical Surface and cylinder cap ectosphere
Face is adjacent to.
Further, described peg and peg ring are respectively provided with a spherical outside surface and Internal Spherical Surface, and two spheres offset, and can do relatively
Slide.
Further, described peg arranges 2-4 oil through, and the size in hole and quantity are according to depending on motor displacement size.
Further, the centre of sphere O of the spherical outside surface of described cylinder cap1It is arranged on the outside of cylinder cap entity.
Further, the centre of sphere of the sphere of described cylinder cap, peg, peg ring, four parts of piston is concentric.
Further, described oil distribution casing and the described oil-distributing plate plane that offsets is provided with three concentric ring bands, is respectively
Outer ring seal band, medium ring band, inner ring seal band, outer on described outer ring seal band in staggered be provided with two row's oilholes and,
Often row's oilhole quantity is 2 or more than 2, and the external envelope radius of circle of described interior row's oilhole is than described outer shroud lubricating oil
The interior envelope radius of circle in hole is big, i.e. R1＞ R2。
Further, the outer interior staggered two row's oilholes that are provided with on described medium ring band, often row's oilhole quantity is 2
Individual or more than 2, the external envelope radius of circle of described interior row's oilhole is bigger than the interior envelope radius of circle of described outer shroud oilhole,
I.e. R3＞ R4。
Further, the outer interior staggered two row's oilholes that are provided with on described inner ring seal band, often row's oilhole quantity is 2
Individual or more than 2, the external envelope radius of circle of described interior row's oilhole is bigger than the interior envelope radius of circle of described outer shroud oilhole,
I.e. R5 ＞ R6.
This utility model compared with prior art, has the following advantages and beneficial effect:
1, this utility model uses extension sleeve structure, the oil cylinder piston coaxial cooperation of composition extension sleeve, does and relatively stretches
Oil cylinder and its axis of piston of contracting motion overlap all the time, eliminate link-type motor because of the relative motion along with piston Yu connecting rod
Side force that axis has an angle of cut and produces and the phenomenon of oval abrasion.
2, the hydraulic pressure oil column surrounded by bearing block, oil cylinder, piston, cylinder cap pushes directly on bearing block and bent axle rotates,
Compared with the pendulum cylinder-type motor of the link-type of prior art and Sai company of Italy, improve mechanical efficiency and reliability.
3, oil cylinder, piston is thin-wall tubular structure, and compared with prior art, quality is lighter, and movement inertia is less, therefore
Being more suitable for high speed operating mode, meanwhile, its processing technique is simpler.
4, between oil cylinder and bearing block, it is sphere-contact between piston and cylinder cap, coordinates with the face of cylinder of link rod structure
Comparing, centering and stability are more preferable, and compared with trunnion configuration, mechanical characteristic is more preferable.
5, use roller bearing structure to become Calzoni company of Italy between oil cylinder and bent axle and Shuande, Foshan is favorite limited
The sliding friction of the slip expansion pendulum cylinder-type motor of company's prior art is rolling friction, is substantially reduced frictional force and caloric value,
But it is embodied as in details again different with the prior art of crankshaft connecting rod type with Sai company of Italy.
6, use elastic rubber ring to replace butterfly spring that retaining ring is applied pretension, compared with prior art, decrease horse
Reaching axial dimension, motor is more compact, and meanwhile, rubber ring has the damping action absorbing energy, can play absorption vibration and noise
Good effect.
7, the oscillation center of extension sleeve is arranged on the outside of cylinder cap entity, increases the pendulum radius of extension sleeve, with
Prior art is compared, and decreases motor rotary speed and torque ripple.
8, bent axle is with bearing block in the axial direction without relative position constraint relation, and the axially and radially degree of freedom of bent axle is by setting
Being placed in the two bearings constraint of housing and protecgulum, bearing block axial freedom is retrained, therefore by housing boss face and protecgulum left side
Can remove and retrain roller and the boss rank of bearing block on crankshaft eccentric shaft part, boss rank of crankshaft eccentric shaft part are only dress
Position temporarily and arrange when joining dismounting, do not play functional effect, dimensional accuracy and surface smoothness requirements during work the highest, because of
This Crankshaft Machining is convenient.
9, offering forced feed lubrication oilhole and counterbalance spring on oil distribution casing, greasy property is more preferable, and reliability is higher.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further described.
Fig. 1 is a kind of crankshaft connecting low-speed big radial plunger type motor structural representation of prior art.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is crankshaft connecting low-speed big radial plunger type motor ellipse abrasion schematic diagram.
Fig. 4 is a kind of slip expansion pendulum cylinder-type low-speed big radial plunger type motor structural representation of prior art
Figure.
Fig. 5 is a solution structural representation disclosed in american documentation literature US5967018.
Fig. 6 is a solution structural representation disclosed in american documentation literature US7267042B2.
Fig. 7 is the structural representation of a kind of pendulum cylinder-type high-torque hydraulic motor that Sai company of Italy produces.
Fig. 8 is the structural representation of this utility model a kind of middling speed high pulling torque radial plunger type motor.
Fig. 9 is this utility model cylinder structure schematic diagram.
Figure 10 is this utility model hook rail structure schematic diagram.
Figure 11 is this utility model crankshaft structure schematic diagram.
Figure 12 is the partial enlarged drawing I of Fig. 8.
Figure 13 is this utility model oil distribution casing structural representation.
Figure 14 is the A-A sectional view of Figure 13.
Figure 15 is the partial enlarged drawing II of Figure 13.
Figure 16 is that this utility model oil distribution casing oilhole arranges schematic diagram.
Wherein in figure:
1. housing 101. casing step face
2. eccentric shaft part 202. convex annular step 203. step end face 204. compensating groove of bent axle 201.
3. roller
4. bearing holder (housing, cover) 401. endoporus 402. bearing holder (housing, cover) spherical outside surface
5. cylinder cap 501. cylinder cap spherical outside surface
6. extension sleeve
7. retaining ring
8. peg 801. screw thread 802. spherical outside surface 803. oil through
9. oil distribution mechanism
10. power transmission shaft
11. oil cylinder 1101. oil cylinder Internal Spherical Surface 1102. grooves
12. piston 1201. piston Internal Spherical Surface 1202. ring-shaped steps
13. retaining ring pressing plates
14. elastic rubber rings
Circlip in 15. bearing holder (housing, cover) grooves
16. pallets
17. self-locking nuts
18. peg ring 1801. Internal Spherical Surface
19. butterfly springs
20. spring bases
21 circlips
22. oil-distributing plates
23. oil distribution casing 2301. outer ring seal band 2302. medium ring band 2303. inner ring seal bands
2304. oilhole 2305. oilhole 2306. oilhole 2307. oilhole 2308. oilholes
The peripheral 2312. oilhole breach of 2308 oilhole 2310. guiding gutter 2311. oil distribution casings
24. floating rings
25 oil distribution mechanism butterfly springs
26. bonnets
27. protecgulum 2701. protecgulum left sides
O1. cylinder cap spherical outside surface centre of sphere O2. the bearing holder (housing, cover) spherical outside surface centre of sphere
X. axis y. axis z. axis e. offset distance.
Detailed description of the invention
In order to make technical characteristic of the present utility model, purpose and beneficial effect become apparent from understanding, the most right
Detailed description of the invention of the present utility model is described in detail.
As shown in Figure 8, a kind of middling speed high pulling torque radial plunger type motor, including housing 1, external output speed and moment of torsion
Bent axle 2, be arranged at housing 1 and the bearing 29 of protecgulum 27 endoporus, be coated in the bent axle 2 eccentric roller 3 of shaft part 201, roller 3
Be placed in the endoporus 401 of bearing holder (housing, cover) 4, the radially uniform cylinder cap 5, along bearing block 4 radial distribution and up and down being anchored on housing 1 of star
Hold the extension sleeve 6 offseted respectively with the spherical outside surface 501 of cylinder cap 5 and the spherical outside surface 402 of bearing holder (housing, cover) 4, by the lower end of extension sleeve 6
All the time it is close to the retaining ring 7 of the spherical outside surface 402 of bearing holder (housing, cover) 4, the upper end of extension sleeve 6 is close to cylinder cap spherical outside surface all the time
The power transmission shaft 10 that the peg 8 of 501, two ends are connected with bent axle 2 left end and oil distribution mechanism 9 respectively.
Extension sleeve 6 comprises oil cylinder 11 and 12 two parts of piston, oil cylinder 11 and piston 12 coaxial cooperation, and axis is z, axle
Line z is all the time by the centre of sphere O of the spherical outside surface 501 of cylinder cap 51Centre of sphere O with the spherical outside surface 402 of bearing holder (housing, cover) 42, during work, oil cylinder 11
With piston 12 along z-axis stretching motion and the centre of sphere O of the sphere 501 around cylinder cap 51Swing.
Bent axle 2, roller 3, bearing holder (housing, cover) 4 constitute a rolling bearing structure, during work, by between oil cylinder 11 and bearing holder (housing, cover) 4
The relative rolling that slip is converted between bearing holder (housing, cover) 4 with bent axle 2, is far smaller than force of sliding friction according to tribology force of rolling friction
Ultimate principle, described scheme is substantially improved the frictional behavior of described middling speed high pulling torque radial plunger type motor.
By retaining ring 7, retaining ring pressing plate 13, the elastic rubber ring that is arranged between retaining ring 7 and retaining ring pressing plate 13
14 and retaining ring pressing plate 13 is close to and the circlip 15 that is fastened in bearing holder (housing, cover) 4 groove by the Internal Spherical Surface 1101 of oil cylinder 11 with
The spherical outside surface 402 of bearing holder (housing, cover) 4 is adjacent to, and the face of being adjacent to seals.
By pallet 16, self-locking nut 17, peg 8, peg ring 18, butterfly spring 19, spring base 20, circlip 21 will
Piston Internal Spherical Surface 1201 is adjacent to cylinder cap spherical outside surface 501, and slipper seal effect is played in the face of being adjacent to.
Oil distribution mechanism 9 includes oil-distributing plate 22, oil distribution casing 23, floating ring 24, butterfly spring 25, bonnet 26, one end and bent axle 3
Hinged power transmission shaft 10 is hinged with oil distribution casing 23 through housing 1 and oil-distributing plate 22 other end, during work, bent axle 2, power transmission shaft 10,
Oil distribution casing 23 synchronizes to rotate forward or backwards around axle x, and one end and bonnet 26 offset the butterfly bullet that the other end offsets with floating ring 24
Floating ring 24 is directly pressed on oil distribution casing 23 by spring 25, and then is indirectly pressed on oil-distributing plate 22 by oil distribution casing 23, at the beginning of playing
Begin to seal and wear-compensating effect, mill i.e. occurs between floating ring 24 and oil distribution casing 23 or between oil distribution casing 23 and oil-distributing plate 22
After damage, under the elastic force effect of butterfly spring 25, between floating ring 24 and oil distribution casing 23, between oil distribution casing 23 and oil-distributing plate 22 still
So keep being adjacent to.
Step surface 101 and gap, protecgulum 27 left side 2701 with housing 1 respectively, described bearing block about 4 two ends offsets,
I.e. bearing block 4 is retrained along the degree of freedom in axle y direction by described step surface 101 and described left side 2701, but bearing block 4 again may be used
Rotate freely around axle x together with bent axle 2.
During work, hydraulic oil is assigned to housing 1 and cylinder cap 5 runner successively through oil distribution structure 9, enters by cylinder cap 5, oil cylinder
11, the cavity volume that piston 12, spheric seat 4 are surrounded, described cavity volume surround hydraulic pressure oil column spheric seat 4 is produced thrust, described in push away
Line of force passes through O all the time2, because of O2There is an offset distance e with the axis x of bent axle 2, so described thrust produces torque to bent axle 2, cause
Make bent axle 2 around axis x rotate, external output speed and moment of torsion, spheric seat 4 around axle x revolve round the sun while around axle y rotation.
As the present embodiment more specifically technical scheme:
Such as Fig. 9, oil cylinder 11 is set to hollow and thin-walled column structure, and lower end (i.e. near Internal Spherical Surface 1101 one end) external diameter is arranged
One groove 1102, for reduce motor axial dimension, the diameter A of groove 1102 is more smaller than oil cylinder internal diameter B, A/B approximate 0.8～
0.85；Consider that contacting of the mechanical strength of oil cylinder 11 and the spherical outside surface 1101 of oil cylinder 11 spherical outside surface 402 with bearing block 4 should simultaneously
Power, size C of oil cylinder 11 should be not too small, and C/A is no less than 0.5, it is preferred that 0.7～0.8.The purpose of design of above-mentioned oil cylinder 11
Being the physical dimension obtaining minimum on the premise of ensureing mechanical strength, reduce movement inertia, this is to improving motor rotary speed
Particularly important.
Because peg 8 spherical outside surface 802 is close to peg ring 18 Internal Spherical Surface 1801, for avoiding hydraulic oil that peg 8 is produced impact,
As shown in Figure 10, peg 8 being opened some oil leak hole 803, the quantity of oil leak hole 803 and diameter depend on that motor displacement is big
Little.
As shown in figure 11, eccentric shaft part 201 left end of bent axle 2 arranges one around the convex annular step 202 of axle y, for assembling and
Position use during dismounting temporarily, during work, do not play functional effect.Therefore, size L precision and step end face 203 fineness are equal
Without too high requirement, therefore Crankshaft Machining is convenient；Concentrate for stress is reduced or eliminated, if arranging arterial highway on eccentric shaft part 201
Compensating groove 204.
As shown in partial enlargement Figure 12, retaining ring 7 is fastened on the groove 1102 of oil cylinder 11 external diameter, is arranged at retaining ring 7
And the elastic rubber ring 14 between retaining ring pressing plate 13 applies elastic force to retaining ring 7, buckles retaining ring 7 at oil cylinder 11 all the time
On groove 1102, make the Internal Spherical Surface 1101 of oil cylinder 11 spherical outside surface 402 all the time with spheric seat 4 be adjacent to, be adjacent in oil cylinder 11
The hydraulic oil of empty inner chamber applies to seal.Described elastic rubber ring 14 material is the nitrile rubber of oil resistant, cross section can be circular,
Square, star or other shape.Compared with the design of the butterfly spring of prior art, because elastic rubber ring 14 can be embedded in holding
In ring-shaped pressuring plate 13 or retaining ring 7 groove, saving installing space, size is the compactest, it addition, elastic rubber ring also has absorption
The damping action of energy, can reduce vibration and noise to a certain extent.
With reference to Fig. 8,13,14, oil distribution casing 23 and oil-distributing plate 22 offset plane be provided with concentric outer ring seal band 2301, in
Ring band 2302, inner ring seal band 2303.On described outer ring seal band 2301, outer interior interlocking is provided with two row's oilholes 2304
With 2305, often row's oilhole quantity can be 2,3,4 ..., concrete depending on motor displacement size and applying working condition,
Hydraulic oil on oil distribution casing 23 guiding gutter 2310 and peripheral 2311 is entered by the breach 2312 of each described oilhole
Each oilhole, carries out forced feed lubrication to friction pair.The external envelope radius of circle of described interior row's oilhole 2305 is than outside described
The interior envelope radius of circle of ring oilhole 2304 is big, i.e. R1＞ R2, its object is to floating ring 22 and oil distribution casing 23 outer ring seal band
Can be lubricated on 2301 contact surfaces.Lubrication hydraulic fluid port method to set up on medium ring band 2302 and inner ring seal band 2303 and
Its purpose is identical with the oilhole method to set up on outer ring seal band 2301 and purpose, and this no longer describes in detail.
Particular embodiments described above, only this utility model preferred embodiment, such as according to this utility model
The equal design that claim is done, all should be technology of the present utility model and is contained.
Claims (21)
1. a middling speed high pulling torque radial plunger type motor, including the bent axle (2) of housing (1), external output speed and moment of torsion,
Be placed in being coated at the roller (3) of the eccentric shaft part (201) of bent axle (2), roller (3) in the endoporus (401) of bearing holder (housing, cover) (4), footpath
To the uniform cylinder cap (5) being anchored on housing (1) of star, it is characterized in that: also include dividing along bearing block (4) radial distribution and upper and lower side
Not and the spherical outside surface (402) of the spherical outside surface (501) of cylinder cap (5) and bearing holder (housing, cover) (4) offset extension sleeve (6), by extension sleeve
(6) lower end is close to the retaining ring (7), by the upper end of extension sleeve (6) all the time of the spherical outside surface (402) of bearing holder (housing, cover) (4) all the time
Be close to the peg (8) of cylinder cap spherical outside surface (501), power transmission shaft that two ends are connected with bent axle (2) and oil distribution mechanism (9) respectively
(10)；
Described extension sleeve (6) comprises oil cylinder (11) and piston (12), described oil cylinder (11) and described piston (12) coaxial cooperation,
Axis (z) is all the time by the centre of sphere (O of the spherical outside surface (501) of cylinder cap (5)1) and the centre of sphere of spherical outside surface (402) of bearing holder (housing, cover) (4)
(O2), during work, oil cylinder (11) and piston (12) edge (z) axle stretching motion and the centre of sphere (O of the sphere (501) around cylinder cap (5)1)
Swing；
Described bent axle (2), roller (3), bearing holder (housing, cover) (4) constitute a rolling bearing structure；
Also include retaining ring (7), retaining ring pressing plate (13), the elasticity that is arranged between retaining ring (7) and retaining ring pressing plate (13)
Rubber ring (14), the circlip (15) be close to retaining ring pressing plate (13) and be fastened in described bearing holder (housing, cover) (4) groove, described
The spherical outside surface (402) of the Internal Spherical Surface (1101) of oil cylinder (11) with bearing holder (housing, cover) (4) is adjacent to by circlip (15)；
Also include pallet (16), self-locking nut (17), peg (8), peg ring (18), butterfly spring (19), spring base (20), bullet
Property back-up ring (21), described pallet (16), self-locking nut (17), peg (8), peg ring (18), butterfly spring (19), spring base
(20), piston Internal Spherical Surface (1201) is adjacent to by circlip (21) with cylinder cap spherical outside surface (501)；
Also include that oil distribution mechanism (9), described oil distribution mechanism (9) include oil-distributing plate (22), oil distribution casing (23), floating ring (24), butterfly
Shape spring (25), bonnet (26), the hinged power transmission shaft (10) of one end and bent axle (3) through housing (1) and oil-distributing plate (22) another
Holding hinged with oil distribution casing (23), during work, bent axle (2), power transmission shaft (10), oil distribution casing (23) synchronize around axle the most forward or backwards
Rotating, floating ring (24) is directly pressed by one end and bonnet (26) other end that offsets with the butterfly spring (25) that floating ring (24) offsets
Tight on oil distribution casing (23), and then indirectly oil distribution casing (23) is pressed on oil-distributing plate (22), play initial sealing and abrasion is mended
Repay effect, after i.e. abrasion occurring between floating ring (24) and oil distribution casing (23) or between oil distribution casing (23) and oil-distributing plate (22),
Under the elastic force effect of butterfly spring (25), between floating ring (24) and oil distribution casing (23), oil distribution casing (23) and oil-distributing plate (22)
Between remain in that and be adjacent to；
Described bearing holder (housing, cover) (4) two ends, left and right respectively with step surface (101) and protecgulum (27) left side (2701) gap of housing (1)
Offset, i.e. bearing holder (housing, cover) (4) is retrained along the degree of freedom in axle (y) direction by described step surface (101) and described left side (2701),
But bearing holder (housing, cover) (4) (x) can rotate freely around axle again together with bent axle (2).
Middling speed high pulling torque radial plunger type motor the most according to claim 1, is characterized in that: during oil cylinder (11) is set to
Empty thin wall cylindrical structure, the described oil cylinder (11) external diameter near Internal Spherical Surface (1101) one end arranges a groove (1102), described ditch
The diameter A of groove (1102) is more smaller than oil cylinder internal diameter B.
Middling speed high pulling torque radial plunger type motor the most according to claim 2, is characterized in that: described groove (1102)
The ratio of diameter A and oil cylinder internal diameter B approximates 0.8～0.85, truncated-spherical size C of oil cylinder (11) and the diameter A of groove (1102)
Ratio not less than 0.5.
Middling speed high pulling torque radial plunger type motor the most according to claim 3, is characterized in that: cutting of described oil cylinder (11)
Sphere size C is 0.7～0.8 with the ratio of the diameter A of groove (1102).
Middling speed high pulling torque radial plunger type motor the most according to claim 1, is characterized in that: described piston (12) is arranged
For hollow and thin-walled column structure.
Middling speed high pulling torque radial plunger type motor the most according to claim 1, is characterized in that: described bent axle (2) inclined
Mandrel section (201) left end arranges one around the convex annular step (202) of axle (y).
Middling speed high pulling torque radial plunger type motor the most according to claim 6, is characterized in that: described bent axle (2) inclined
Mandrel section (201) arranges 2-4 road compensating groove.
Middling speed high pulling torque radial plunger type motor the most according to claim 1, is characterized in that: described bearing holder (housing, cover) (4) it
Endoporus (401) is set to one without the unthreaded hole on boss rank.
Middling speed high pulling torque radial plunger type motor the most according to claim 8, is characterized in that: described bearing holder (housing, cover) (4) it
Endoporus (401) arranges 2 road compensating grooves.
Middling speed high pulling torque radial plunger type motor the most according to claim 1, is characterized in that: described retaining ring (7) with
Arranging an elastic rubber ring (14) between retaining ring pressing plate (13) and place the groove of elastic rubber ring (14), groove both can be arranged
In retaining ring (7), it is possible to be arranged on retaining ring pressing plate (13).
11. middling speed high pulling torque radial plunger type motors according to claim 10, is characterized in that: be arranged at retaining ring
(7) elastic rubber ring (14) material and between retaining ring pressing plate (13) is nitrile rubber, and elastic rubber ring (14) cross section can
To be circular, square, star or other shape.
12. middling speed high pulling torque radial plunger type motors according to claim 10, is characterized in that: described retaining ring (7)
Arranging an endoporus, retaining ring pressing plate (13) arranges a boss, and the boss of the endoporus of retaining ring (7) and retaining ring pressing plate (13) is joined
Closing, cooperation axis is axle (y).
13. middling speed high pulling torque radial plunger type motors according to claim 1, is characterized in that: under described oil cylinder (11)
The periphery of end, the periphery of the one end that i.e. offsets with spheric seat (4) arranges a groove, and retaining ring (7) is fastened on outside oil cylinder (11) lower end
On the groove enclosed, by retaining ring (7), the elastic rubber ring (14) that is arranged between retaining ring (7) and retaining ring pressing plate (13),
Retaining ring pressing plate (13), is close to retaining ring pressing plate (13) and the circlip (15) that is fastened in bearing holder (housing, cover) (4) groove is by oil
The Internal Spherical Surface (1101) of cylinder (11) is adjacent to the spherical outside surface (402) of bearing holder (housing, cover) (4).
14. middling speed high pulling torque radial plunger type motors according to claim 1, is characterized in that: in described piston (12)
Hole arranges a ring-shaped step (1202), by the pallet (16) offseted with ring-shaped step (1202), with the screw thread of peg (8)
(801) self-locking nut (17) coordinated, peg (8), peg ring (18), butterfly spring (19), spring base (20), circlip
(21) piston Internal Spherical Surface (1201) is adjacent to cylinder cap spherical outside surface (501).
15. middling speed high-torque hydraulic motors according to claim 14, is characterized in that: described peg (8) and peg ring
(18) being respectively provided with a spherical outside surface (802) and Internal Spherical Surface (1801), two spheres (802) and (1801) offset, and can do slip relatively.
16. middling speed high pulling torque radial plunger type motors according to claim 15, is characterized in that: described peg (8) sets
Put 2-4 oil through (803), the size in hole and quantity according to depending on motor displacement size.
17. middling speed high pulling torque radial plunger type motors according to claim 1, is characterized in that: outside described cylinder cap (5)
The centre of sphere (the O of sphere (501)1) it is arranged on the outside of cylinder cap (5) entity.
18. middling speed high pulling torque radial plunger type motors according to claim 1, is characterized in that: described cylinder cap (5), extension
Bar (8), peg ring (18), the sphere (501) of (12) four parts of piston, (802), (1801), (1201) the centre of sphere concentric.
19. middling speed high pulling torque radial plunger type motors according to claim 1, is characterized in that: described oil distribution casing (23)
It is provided with three concentric ring bands with described oil-distributing plate (22) plane that offsets, is that outer ring seal band (2301), medium ring are close respectively
Sealing band (2302), inner ring seal band (2303), described outer ring seal band (2301) upper outer interior interlocking is provided with two row's oilholes
(2304) and (2305), often row's oilhole quantity is 2 or more than 2, the external envelope of described interior row's oilhole (2305)
Radius of circle is bigger than the interior envelope radius of circle of described outer shroud oilhole (2304), i.e. R1＞ R2。
20. middling speed high pulling torque radial plunger type motors according to claim 19, is characterized in that: described medium ring band
(2302) staggered two row's oilhole (2306) and (2307) that are provided with in upper outer, often arrange oilhole quantity be 2 or 2 with
On, the external envelope radius of circle of described interior row's oilhole (2307) is than the interior envelope radius of circle of described outer shroud oilhole (2306)
Greatly, i.e. R3＞ R4。
21. middling speed high pulling torque radial plunger type motors according to claim 19, is characterized in that: described inner ring seal band
(2303) staggered two row's oilhole (2308) and (2309) that are provided with in upper outer, often arrange oilhole quantity be 2 or 2 with
On, the external envelope radius of circle of described interior row's oilhole (2309) is than the interior envelope radius of circle of described outer shroud oilhole (2308)
Greatly, i.e. R5 ＞ R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620327732.6U CN205618296U (en) | 2016-04-19 | 2016-04-19 | Radial plunger hydraulic motor of big moment of torsion of intermediate speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620327732.6U CN205618296U (en) | 2016-04-19 | 2016-04-19 | Radial plunger hydraulic motor of big moment of torsion of intermediate speed |
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| CN205618296U true CN205618296U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756850A (en) * | 2016-04-19 | 2016-07-13 | 佛山市顺德区中意液压有限公司 | Intermediate-speed large-torque radial plunger hydraulic motor |
| CN109975028A (en) * | 2019-04-11 | 2019-07-05 | 佛山市顺德区中意液压有限公司 | Radial plunger piston motor oil cylinder eccentric shaft friction friction force measuring device and its measurement method |
-
2016
- 2016-04-19 CN CN201620327732.6U patent/CN205618296U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756850A (en) * | 2016-04-19 | 2016-07-13 | 佛山市顺德区中意液压有限公司 | Intermediate-speed large-torque radial plunger hydraulic motor |
| WO2017181907A1 (en) * | 2016-04-19 | 2017-10-26 | 佛山市顺德区中意液压有限公司 | Medium-speed high-torque radial piston hydraulic motor |
| CN105756850B (en) * | 2016-04-19 | 2017-11-10 | 佛山市顺德区中意液压有限公司 | A kind of middling speed high pulling torque radial plunger type motor |
| CN109975028A (en) * | 2019-04-11 | 2019-07-05 | 佛山市顺德区中意液压有限公司 | Radial plunger piston motor oil cylinder eccentric shaft friction friction force measuring device and its measurement method |
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