CN100520059C - High pressure and large torque cycloid hydraulic motor and special hob cutter - Google Patents
High pressure and large torque cycloid hydraulic motor and special hob cutter Download PDFInfo
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- CN100520059C CN100520059C CNB2007101309116A CN200710130911A CN100520059C CN 100520059 C CN100520059 C CN 100520059C CN B2007101309116 A CNB2007101309116 A CN B2007101309116A CN 200710130911 A CN200710130911 A CN 200710130911A CN 100520059 C CN100520059 C CN 100520059C
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Abstract
The present invention relates to a high-pressure cycloid oil hydraulic motor with big torque, and a special hob, the present invention belongs to the technique field of the fluid drive. The motor comprises a shell body which is formed essentially by fixing and connecting with a capsid, a stator and a postoperculum. An output shaft is supported in the capsid; the stator and a rotator form a cycloidal needle wheel; and a port plate is arranged in the postoperculum. The output shaft and the rotor joggle and connect in the drive way with external splines of the two ends of a universal driving shaft by the internal splines in the endoporus respectively. The rotor and the port plate joggle and connect in the drive way with external splines of the two ends of the universal driving shaft by the internal splines in the endoporus respectively. The tooth top of the internal rotor splines faces to the tooth trough of the external tooth. The external splines which have the same teeth quantity at the two ends of the universal driving shaft form an angle of deviation, and the modulus of the external splines at the end that the universal driving shaft joggles with the rotor is more than that of joggling with the port plate. The present invention obviously enhances the ability of pressure bearing and big torque transmission of the oil hydraulic motor under the circumstances of keeping the overall sizes without changing the production cost.
Description
Technical field
The present invention relates to a kind of hydraulic pressure can be to the cycloid hydraulic motor of mechanical energy conversion, and especially a kind of cycloid hydraulic motor with improvement structure flow couple axle also relates to the special-purpose hob cutter that this flow couple axle is processed simultaneously, belongs to hydraulic transmission technology field.
Background technique
Cycloid hydraulic motor is the conventional apparatus that realizes liquid-function conversion.Its basic structure is to be shaped on liquid entering hole and refluxing opening on housing or the bonnet, one end is equipped with cycloidal-pin wheel pair and flow-distribution mechanism, the other end is equipped with output shaft, and the rotor of cycloidal-pin wheel pair is by the external gear engagement of internal spline and couple axle one end, and the other end of couple axle is connected with the output shaft transmission.During work, flow-distribution mechanism makes liquid entering hole be communicated with the expansion engagement chamber of cycloidal-pin wheel pair, and the contraction chamber of cycloidal-pin wheel pair is communicated with refluxing opening.As a result, after pressured fluid enters housing or bonnet from liquid entering hole, enter the secondary expansion engagement chamber that forms of cycloidal-pin wheel again, its volume is constantly enlarged, the liquid in the secondary contraction engagement chamber that forms of cycloidal-pin wheel then refluxes from refluxing opening simultaneously.In this process, the rotor of cycloidal-pin wheel pair is expanded engagement chamber and the pressure difference rotary driving of shrinking the engagement chamber, produces moment of torsion, and this driving torque is delivered to output shaft output by couple axle, thereby realizes that hydraulic pressure can be to the conversion of mechanical energy.Meanwhile, flow-distribution mechanism is also by the synchronous driven rotary of flow couple axle, and the continuous switching connected state that goes round and begins again is continued transfer process.Like this, the output torque that oil hydraulic motor just can be continuous.Therefore cycloidal pinion engaged pair and flow-distribution mechanism are the cores of oil hydraulic motor.
In order to adapt to the development and change of application, the through-put power that improves constantly oil hydraulic motor becomes the research topic that becomes more and more important gradually.Yet the flat porting cycloid hydraulic pressure motor of existing medium and small discharge capacity can't be realized reliable and stable high pulling torque output owing to be subjected to the restriction of rotor, the original intensity of couple axle and rigidity.And keeping under the constant situation of original overall sizes, the entity size that adds greater trochanter, couple axle and flow system simultaneously not only is difficult to realize, and will bring a series of problems such as the big or bulk strength rigidity of manufacture difficulty.
Summary of the invention
The technical problem to be solved in the present invention is: by centering float amount cycloid hydraulic motor, especially have the research of plane distributing construction cycloid hydraulic motor integral structure layout, find out the weak link that it bears the high pressure high pulling torque, keeping under the constant prerequisite of overall dimensions, propose a kind of compact structure, move steadily reliably, can bear the cycloid hydraulic motor of high pressure high pulling torque, thereby satisfy various new user demands.
Research and test show, the output shaft in the existing cycloid hydraulic motor frame set and external splines engaging tooth, rotor and the inner internal spline engaging tooth thereof at inner internal spline engaging tooth, couple axle and two ends thereof thereof, the three is directly bearing the propagation function of pressure formation and moment of torsion, substantially following the industry installation code, keeping under the immovable condition of its external dimension, only rely on the intensity of improving its material or select more favourable spline modification coefficient, can not reach desirable improvement effect.Wherein, the couple axle diameter is less, is the weakest link.
For this reason, the claimant has taked following a series of related behaves:
At first, suitably strengthen the couple axle diameter, to improve its rigidity and intensity.The problem of bringing is, must corresponding increasing with the endoporus of the petal-shaped rotor of couple axle engagement, and the intensity of rotor and rigidity are weakened as a result.But the claimant notices that the tooth paddy of prior art rotor is just in time relative with the tooth root of its internal spline, makes when strengthening endoporus, becomes the weakest link herein.
Then, for intensity and the rigidity that guarantees rotor, make it can bear the high pressure transmitting large torque, choose as far as possible rotor than major diameter (Φ 16) and pin tooth centre distance (Φ 62) in, the claimant has changed the angle relative position of internal spline and rotor external tooth, make the tooth paddy of the tooth top of internal spline, thereby kept identical entity structure, and the intensity of rotor and rigidity are enhanced over against rotor.More than change will cause the flow couple axle by the structural change of original two ends symmetry spline for the corresponding transposition of spline that spline strengthens and thrust plate meshes an end of rotor engaged one end, cause difficulty of processing obviously to increase thus.
So, in order to keep manufacturing efficiency, not increasing manufacture cost, the claimant has designed the cutter of migrating that once can process non-symmetry structure.
Finally, properly settled technical problem of the present invention, kept having significantly improved the pressure-bearing of oil hydraulic motor and the ability of transmission high pulling torque under the constant substantially situation of overall sizes, manufacture cost.Conclusion is got up, cycloid hydraulic motor of the present invention comprises the housing that is shaped on liquid entering hole and refluxing opening, described housing is mainly by the body shell, stator and the bonnet formation that is connected, be supported with output shaft in the described body shell, described stator and rotor wherein constitute the cycloidal-pin wheel pair, in the described bonnet thrust plate is housed, connect with the external splines engagement driving at couple axle two ends respectively by the internal spline in the endoporus separately between described output shaft and the rotor, connect with the external splines engagement driving at flow couple axle two ends respectively by the internal spline in the endoporus separately between described rotor and the thrust plate, structure characteristic after it improves is: the tooth top of described rotor internal spline is over against the tooth paddy of its external tooth, the external spline teeth of the identical number of teeth in described flow couple axle two ends forms the angle of deviation, and the modulus of described flow couple axle and rotor engaged one end external spline teeth meshes the modulus of an end external spline teeth greater than itself and thrust plate.
It is when the external tooth of described rotor is in first quartile and is adjacent tooth about longitudinal axis symmetry that the present invention further improves, the tangent line of its tooth peak along clockwise direction each point to the cycloidal profile curve between the tooth paddy and the angle of transverse axis are all less than 90 degree (being called for short no flex point, when angle is 90 to be defined as flex point when spending).Compare with the cycloid that flex point was arranged in the past, above-mentioned improvement structure of the present invention not only itself can improve intensity to a certain extent, and make the secondary pin tooth of cycloidal-pin wheel have big as far as possible diameter, allow to choose the pin tooth centre distance of trying one's best big, therefore guarantee the intensity and the rigidity of rotor and stator, helped to improve the ability that the stator engagement pair is born the high pressure high pulling torque of changeing.
The special-purpose hob cutter integral body of flow couple axle of the present invention is cylindric, and two ends are shaped on the hobboing cutter tooth respectively, and the cutting phase place of described two ends hobboing cutter tooth forms the angle of deviation, and the processing modulus of an end hobboing cutter tooth is greater than the other end.Like this, the cog machining cutter of two kinds of different moduluses is integrated in together together, can be by the string cutter processing function of equipment such as multi-axis linkage numerical control gear hobbing working machine tool, time processing goes out the asymmetrical flow couple axle in two ends, and guarantees that the two ends profile of tooth forms required relative angular position.
Description of drawings
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.
Dust ring 1 among the figure, high pressure shaft seal 2, body shell 3, bearing 4, bearing spacer 5, output shaft 6, couple axle 7, pad 8, plug screw 9, stator 10, pin tooth 11, rotor 12, steel ball 13, O type circle 14,16,18,31, hydraulic fluid port lid 15, bonnet 17, flow dunnage 19, fore-set 20, elastic support 21, pin 22,25, connecting bolt 23, thrust plate 24, flow platen 26, flow couple axle 27, connecting plate 28, butterfly circle 29, Thrust nut 30, reservoir body 32.
Fig. 2 (A) is the cross section structure schematic representation of original rotor.
Fig. 2 (B) is the cross section structure schematic representation of Fig. 1 embodiment rotor.
Fig. 3 is the structural representation of flow couple axle among Fig. 1 embodiment.
Fig. 4 is the side view of Fig. 3.
Fig. 5 is the structural representation of flow couple axle machining tool among Fig. 1 embodiment.
Embodiment
Embodiment one
The cycloid hydraulic motor of present embodiment as shown in Figure 1, its basic structure, monnolithic case, Conncetion cimension all with present existing medium and small discharge capacity cycloid hydraulic motor (for example BM30, BMS, typical structure is referring to number of patent application: 200620170889.9 Chinese patent application) identical, and all can bear and exceed conventional more high pressure and high pulling torque more more than 20% but its moment of torsion forms mechanism and transfer mechanism.
Housing mainly is connected by body shell 3, stator 10, flow platen 26 and bonnet 17 and constitutes.Be supported with output shaft 6 by bearing 4 in the body shell 3, stator 10 and rotor wherein 12 constitute the cycloidal-pin wheel pairs by pin tooth 11, and thrust plate 24 is housed in the bonnet 17.Connect with the external splines engagement driving at couple axle 7 two ends respectively by the internal spline in the endoporus separately between output shaft 6 and the rotor 12, connect with the external splines engagement driving at flow couple axle 27 two ends respectively by the internal spline in the endoporus separately between rotor 12 and the thrust plate 24.The internal spline of rotor 12 is handled through transposition, and as shown in Figure 2, the tooth top of internal spline is over against the tooth paddy of its external tooth, thereby avoids becoming weak link herein.And, position shown in Fig. 2 (B), when the external tooth of rotor was in first quartile and be adjacent tooth about longitudinal axis symmetry, each point is gone up at its tooth peak along clockwise direction to the cycloidal profile curve C BA between the tooth paddy tangent line and the angle of transverse axis be not all less than 90 degree (become 90 tangent lines of spending or do not have the normal of substantially horizontal) with X-axis.Like this, change the design of traditional flank profil---certainly exist the tangent line of vertical direction more at least, i.e. the tangent line (referring to Fig. 2 (B) b point) of 90 degree.This improvement can form more slick and sly and strong flank profil, helps transmitting high pulling torque.
The structure of flow couple axle is shown in Fig. 3,4, two ends have the external splines of the identical number of teeth, angle forms the angle of deviation α that equals 1/2nd angles between teeth between two end teeth, and mesh the modulus of an end external spline teeth with the modulus of rotor engaged one end external spline teeth greater than itself and thrust plate, thereby form big small end.This structure can still can keep the various distributing constructions of original oil hydraulic motor and relevant part profile thereof, does not change the accuracy of flow relation, and has changed the intensity of moment of torsion formation with transfer mechanism.Be the inefficacy that prevents that killing from appearring in the flow system, it is shorter that itself and thrust plate mesh an end external spline teeth profile of tooth, a little chamfering δ of outermost section, and chamfering δ is about the 20-30 degree.
In addition, for the profile of tooth that makes the flow couple axle and the eccentric motion of gerotor motor adapt, the external spline teeth both sides of the every end of flow couple axle form the γ angle to the axial direction inclination, arc transition connects between the external spline teeth both sides, and the γ angle is defined as usually than the big 1-3 degree of gerotor motor eccentric motion pivot angle (angle among Fig. 1 between output shaft and the flow couple axle axis).
Processing flow couple axle two ends are non-, and it is cylindric that integral body is to the special-purpose hob cutter that becomes structure as shown in Figure 5, and two ends are shaped on the hobboing cutter tooth respectively, and the cutting phase place of two ends hobboing cutter tooth forms corresponding angle of deviation α, and the processing modulus of an end hobboing cutter tooth is greater than the other end.Like this cog machining hobboing cutter of two kinds of different moduluses is integrated in samely as on the cutter, the distance between two cutters is L, and its teeth groove is respectively E1, E2, and transverse tooth thickness is respectively S1, S2.Utilize the string cutter processing function of multi-axis linkage numerical control gear hobbing working machine tool, can time processing go out the asymmetric flow couple axle in two ends.
The bonnet 17 of this cycloid hydraulic motor is shaped on liquid entering hole and refluxing opening.Two bearings 4 that support output shaft 6 use the stronger tapered roller bearing of bearing capacity, and 2 pairs of output shafts 6 of high pressure shaft seal and body shell 3 seal.The rotor 12, stator 10 and the pin tooth 11 that are positioned at body shell 3 right-hand members constitute the cycloidal-pin wheel pair, under the driving of high low pressure hydraulic oil, can convert hydraulic pressure to mechanical energy by the rotation of rotor, thereby form energy conversion device.Couple axle 7 is delivered to the output shaft of body shell left end with the moment of torsion of rotor by the spline engagement tooth, thereby output mechanical energy forms power take-off.Flow platen 26, thrust plate 24, flow dunnage 19 and bonnet 17 are formed the flow-distribution mechanism that is positioned at body shell right-hand member.The spline engagement tooth at flow couple axle 27 two ends links together the motion and the thrust plate of rotor, becomes the contact tie that flow-distribution mechanism obtains continuous motion power.
Be shaped on outer drain tap on the body shell 3, form, should can link the direct oil sump tank of fluid with the pipeline of hydraulic system by outer drain tap in the use by pad 8, plug screw 9 and connecting thread thereof.Make the main purpose of outer drain tap in order that when the back pressure of return opening is too high, reduce the pressure-bearing of high pressure shaft seal 2, avoid influencing the sealability and the life-span of axle envelope.The reservoir body 32 of the internal leakage fluid of each gap oil film motion of outer drain tap and motor is connected, reservoir body is made up of the cavity between the inside and outside spline engagement body of body shell 3, output shaft 6 and bearing 4 and couple axle 7 and flow couple axle 27, reservoir body has the passage that the fluid high low pressure circulates in each continuous junctor inside of motor, whole passage is connected with oil inlet and outlet, can take away impurity and heat thereof in flowing.
In the motor operations process of present embodiment, high pressure fluid leaks in right amount by fitting surface unavoidably, these internal leakage fluid enter reservoir body by couple axle, sealing owing to the butterfly circle of making by teflon master material 29, enter the inner chamber body of output shaft, the aperture inflow bearing 4 by front end finally reaches the oil port that leaks, when outer drain tap with after fuel tank directly communicates, fluid can be got back to fuel tank.When outer drain tap not during connected tank, fluid is got back to fuel tank by two check valve body and the passage that connects with hydraulic fluid port thereof.Promptly, motor is (switching of high low pressure oil inlet and outlet) under positive and negative two sense of rotation working staties, two check valve body are alternately in running order, internal drainage liquid forms the loop in cavity, lubricated, cooling bearing 4, and can directly turn back to hydraulic circuit by check valve body, can take away impurity and heat thereof in flowing.
Facts have proved that the cycloid hydraulic motor processing technology of present embodiment is simple, has reliable high pressure seal result.Adopt the above-mentioned oil hydraulic motor of this device to have the sealing effect ideal, therefore reduced in the motor and let out, improved mechanical efficiency, make motion output more steady.When being applied to the transmission device of oil hydraulic motor and so on, can make the cycloid hydraulic motor of original specification can bear higher pressure and bigger moment of torsion.
In addition to the implementation, the present invention can also have other mode of executions, can be round structure or the like as the external form of motor.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (8)
1. high pressure and large torque cycloid hydraulic motor, comprise the housing that is shaped on liquid entering hole and refluxing opening, described housing is mainly by the body shell, stator and the bonnet formation that is connected, be supported with output shaft in the described body shell, rotor in described stator and the described stator constitutes the cycloidal-pin wheel pair, in the described bonnet thrust plate is housed, connect with the external splines engagement driving at couple axle two ends respectively by the internal spline in the endoporus separately between described output shaft and the rotor, connect with the external splines engagement driving at flow couple axle two ends respectively by the internal spline in the endoporus separately between described rotor and the thrust plate, it is characterized in that: the tooth top of described rotor internal spline is over against the tooth paddy of its external tooth, the external spline teeth of the identical number of teeth in described flow couple axle two ends forms the angle of deviation, and the modulus of described flow couple axle and rotor engaged one end external spline teeth meshes the modulus of an end external spline teeth greater than itself and thrust plate.
2. according to the described high pressure and large torque cycloid hydraulic motor of claim 1, it is characterized in that: when the external tooth of described rotor was in first quartile and be adjacent tooth about longitudinal axis symmetry, its tooth peak along clockwise direction tangent line of each point to the cycloidal profile curve between the tooth paddy was all spent less than 90 with the angle of transverse axis.
3. according to the described high pressure and large torque cycloid hydraulic motor of claim 2, it is characterized in that: the described angle of deviation (α) equals 1/2nd angles between teeth.
4. according to the described high pressure and large torque cycloid hydraulic motor of claim 3, it is characterized in that: described flow couple axle and thrust plate mesh outer section chamfering of an end external spline teeth, and described chamfering is the 20-30 degree.
5. according to the described high pressure and large torque cycloid hydraulic motor of claim 4, it is characterized in that: be shaped on outer drain tap on the described body shell, described outer drain tap is connected with the reservoir body of the internal leakage fluid of each gap oil film motion.
6. according to the described high pressure and large torque cycloid hydraulic motor of claim 5, it is characterized in that: described reservoir body is communicated with outer drain tap through the inner chamber body through output shaft behind the butterfly circle.
7. according to the described high pressure and large torque cycloid hydraulic motor of claim 6, it is characterized in that: fixing flow platen between described bonnet and the stator, two check valve body are installed in the described flow platen, described check valve body is made of the steel ball that is placed in the flow platen step hole, described two check valve body and two unidirectional valve openings converge, and a duct by stator is connected with outer drain tap.
8, according to the special-purpose hob cutter of the described high pressure and large torque cycloid hydraulic motor flow of claim 1 couple axle, it is characterized in that: integral body is cylindric, two ends are shaped on the hobboing cutter tooth respectively, and the cutting phase place of described two ends hobboing cutter tooth forms the angle of deviation, and the processing modulus of an end hobboing cutter tooth is greater than the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101309116A CN100520059C (en) | 2007-08-23 | 2007-08-23 | High pressure and large torque cycloid hydraulic motor and special hob cutter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101309116A CN100520059C (en) | 2007-08-23 | 2007-08-23 | High pressure and large torque cycloid hydraulic motor and special hob cutter |
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| CN101117940A CN101117940A (en) | 2008-02-06 |
| CN100520059C true CN100520059C (en) | 2009-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101839209A (en) * | 2010-05-11 | 2010-09-22 | 镇江大力液压马达有限责任公司 | In-built baking cycloid hydraulic motor |
| CN106545463A (en) * | 2016-12-08 | 2017-03-29 | 镇江大力液压马达股份有限公司 | A kind of high pressure flat porting cycloid hydraulic pressure motor |
| CN108422050A (en) * | 2017-02-15 | 2018-08-21 | 上海国由复合材料科技有限公司 | A kind of milling machine formula gear-hobbing machine |
| CN106870274A (en) * | 2017-04-15 | 2017-06-20 | 镇江大力液压马达股份有限公司 | A kind of big radial load supporting plane distributing cycloid hydraulic motor |
| CN112240323B (en) * | 2020-10-07 | 2023-03-31 | 邢台中伟卓特液压科技有限公司 | Hydraulic cycloid motor |
| CN112664581A (en) * | 2020-11-19 | 2021-04-16 | 宁波诺义信电气设备有限公司 | High-precision spindle connecting sleeve |
| CN114906554A (en) * | 2022-07-15 | 2022-08-16 | 溧阳市创新机械有限公司 | Shaftless screw conveyor for high-temperature-resistant rotary kiln |
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| US4457677A (en) * | 1981-12-04 | 1984-07-03 | Todd William H | High torque, low speed hydraulic motor |
| US4881880A (en) * | 1988-04-19 | 1989-11-21 | Parker Hannifin Corporation | Drain for internal gear hydraulic device |
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| CN101117940A (en) | 2008-02-06 |
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