CN200996353Y - High-pressure cycloidal hydraulic motor with large torsional moment - Google Patents

High-pressure cycloidal hydraulic motor with large torsional moment Download PDF

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Publication number
CN200996353Y
CN200996353Y CN 200720033329 CN200720033329U CN200996353Y CN 200996353 Y CN200996353 Y CN 200996353Y CN 200720033329 CN200720033329 CN 200720033329 CN 200720033329 U CN200720033329 U CN 200720033329U CN 200996353 Y CN200996353 Y CN 200996353Y
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CN
China
Prior art keywords
flow
rotor
hydraulic motor
high pressure
cycloidal
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Expired - Lifetime
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CN 200720033329
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Chinese (zh)
Inventor
王志生
张智敏
王顺发
翁爱光
吴术
刘云
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ZHENJIANG DALI HYDRAULIC COMPONENT CO Ltd
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ZHENJIANG DALI HYDRAULIC COMPONENT CO Ltd
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Priority to CN 200720033329 priority Critical patent/CN200996353Y/en
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Publication of CN200996353Y publication Critical patent/CN200996353Y/en
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Abstract

A high-pressure big torque cycloid hydraulic motor includes a shell which is provided with a liquid inlet and a back-flow port; a back cover and a stator are connected with the shell, one end of the shell is installed with a cycloid pin wheel pair and a fluid distribution device, and the other end is installed with an output shaft; the rotor of cycloid pin wheel pair is toothed with an external gear which is at one end of a linked shaft through an internal spline, and the external spline which is at the other end of linked shaft is toothed with the internal spline at the internal end of the output shaft; the rotor of cycloid pin wheel pair is toothed with the external gear which is at one end of fluid distribution lifted shaft through the internal spline; the external spline which is at the other end of fluid distribution linked shaft is toothed with the liquid distribution plate internal spline of liquid distribution device; moreover, the motor is characterized in that the normal section curve of tooth profile of the cycloid pin wheel pair rotor adopts the cycloid structure that the tooth end is provided with no turning point.

Description

The high pressure large torque cycloid hydraulic motor
Technical field
The utility model relates to a kind of hydraulic pressure can be to the cycloid hydraulic motor of mechanical energy conversion, and especially a kind of plane flow oil hydraulic motor that can bear the high pressure high pulling torque belongs to hydraulic transmission technology field.
Background technique
Cycloid hydraulic motor is the fluid pressure drive device of using always, is the hydraulic pressure execution device commonly used of realizing liquid-function conversion.Cycloid hydraulic motor has advantages such as volume is little, specific power density is big, efficient is high, speed range is wide, thereby has obtained extensive use.This type of device 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, the result, after pressured fluid enters housing or bonnet from liquid entering hole, enter the secondary expansion engagement chamber that forms of cycloidal-pin wheel, its volume is constantly enlarged, liquid then refluxes from refluxing opening in the secondary contraction engagement chamber that forms of cycloidal-pin wheel simultaneously; In this process, the rotor of cycloidal-pin wheel pair is expanded the engagement chamber and orders about rotation with the pressure difference of shrinking the engagement chamber, and this rotation 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 flow couple axle driven rotary, and the continuous switching connected state that goes round and begins again is continued transfer process, like this, and the output torque that motor just can be continuous.We can say that cycloidal pinion engaged pair and flow-distribution mechanism are the cores of oil hydraulic motor.
Yet, the flat porting cycloid hydraulic pressure motor of existing medium and small discharge capacity is owing to exist weak link in the overall structure, rotor radially less, the bindiny mechanism of transmitting torque is also corresponding less, therefore when bearing the high pressure high pulling torque, occur the defective that intensity causes a little less than easily, influence the stable working and the reliability of motor.
The model utility content
The purpose of this utility model 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, a kind of compact structure is proposed, motion is more steady, especially can bear the cycloid hydraulic motor of high pressure high pulling torque.
Studies show that, the output shaft in the 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 the desirable effect of improving.In addition, though flow couple axle and two ends thereof originally became the not direct transmitting torque of the external splines engaging tooth of symplex structure, intensity is enough, but owing to must finish the transmission of flow relation between rotor and the flow-distribution mechanism, thereby in the pressure raising, when moment of torsion strengthens, its structure is necessary reasonably to be changed and strengthens.
In order to reach the foregoing invention purpose, its technological scheme is: high pressure large torque cycloid hydraulic motor of the present utility model comprises the bonnet that is shaped on liquid entering hole and refluxing opening, described bonnet and stator and body shell are connected, an end is equipped with cycloidal-pin wheel pair and flow-distribution mechanism in the described body shell, the other end is equipped with output shaft, the rotor of described cycloidal-pin wheel pair is by the external gear engagement of internal spline and couple axle one end, the internal spline engagement of the external splines of the described couple axle the other end and output shaft the inner, the rotor of described cycloidal-pin wheel pair also meshes by the external gear of internal spline and flow couple axle one end, the internal spline of thrust plate engagement in the external splines of the described flow couple axle the other end and the flow-distribution mechanism, its improvements are: the contacting profile normal section curve of the secondary rotor of described cycloidal-pin wheel is the gerotor structure that tooth ends does not have flex point.
Compare with the cycloid that flex point was arranged in the past, above-mentioned improvement structure of the present utility model not only itself can improve intensity to a certain extent, and allow the diameter of the secondary pin tooth of cycloidal-pin wheel bigger, and therefore having improved and changeed the ability to work that the stator engagement pair is born the high pressure high pulling torque, transmission is more steady.
It is that described flow couple axle two ends are non-symmetry structure that the utility model further improves, the number of teeth at two ends is identical, but with the modulus of rotor engaged one end external spline teeth greater than meshing the modulus of an end external spline teeth with thrust plate, the unique correspondence that so still keeps the profile of tooth relative position can further improve the accuracy that the motor flow concerns.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is an embodiment's of the utility model a structural representation.
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.
Fig. 2 is the structural representation of cycloidal engagement pair rotor curve among Fig. 1 embodiment.
Fig. 3 is the structural representation of flow couple axle among Fig. 1 embodiment.
Embodiment
Embodiment one
The high pressure large torque cycloid hydraulic motor of present embodiment, as shown in Figure 1, (its structure is described referring to number of patent application: on the basis 200620170889.9 Chinese patent application) in present existing medium and small discharge capacity cycloid hydraulic motor BM30, BMS series, the size of its monnolithic case, Conncetion cimension is constant substantially, but moment of torsion forms mechanism and transfer mechanism all can bear the high pressure high pulling torque.This cycloid hydraulic motor is interfixed by output shaft 6, body shell 3, stator 10 and bonnet 17 and forms the hydraulic oil reservoir body.Bonnet 17 is shaped on liquid entering hole and refluxing opening.Body shell 3 is monolithic constructions, and output shaft 6 is supported in the body shell by two bearings 4, and bearing uses 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.
Its improvements are: the contacting profile normal section curve of the secondary rotor of described cycloidal-pin wheel is the gerotor structure that tooth ends does not have flex point.
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.Rotor 12 is by the external gear engagement of internal spline and couple axle 7 one ends, and the external splines of couple axle 7 the other ends and the internal spline of output shaft the inner mesh; Also by the external gear engagement of internal spline and flow couple axle 27 1 ends, the internal spline of thrust plate 24 meshes rotor 12 in the external splines of this flow couple axle the other end and the flow-distribution mechanism simultaneously.The spline engagement tooth at flow couple axle 27 two ends links together the motion and the thrust plate of rotor, is the contact tie of flow-distribution mechanism continuous motion power.Be shaped on outer drain tap on the body shell 3, form, can link the direct oil sump tank of fluid with the pipeline of hydraulic system in the use by pad 8, plug screw 9 and connecting thread thereof.The main purpose of making outer drain tap be be the pressure-bearing that back pressure at return opening reduces high pressure shaft seal 2 when too high, avoid influencing the sealability and the life-span of axle envelope.The reservoir body of the internal leakage fluid of each gap oil film motion of outer drain tap and motor is connected, 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, fixing flow platen 26 between bonnet 17 and the stator 10, two check valve body are installed in the flow platen 26 that is connected with oil inlet and outlet, check valve body is made of the steel ball 13 that is placed in flow platen 26 step holes, the other end and two unidirectional valve openings in two check valve body converge, and a duct by stator is connected with outer drain tap.Because check valve body is not arranged on the bonnet of motor, therefore increased the technology capability of bonnet, cancelled the processing of tiltedly dark aperture, having increased motor is the possibility of particular customer Transform Type design.
In the motor operations process, internal leakage elevated pressures fluid is by couple axle motion cavity, by the sealing of butterfly circle 29, this butterfly circle 29 is made by softer teflon master material, and fluid enters the inner chamber body of output shaft, flow into bearing 4 by aperture, enter the oil port that leaks.Like this, motor is (being the exchange of high low pressure oil inlet and outlet) under positive and negative two sense of rotation working staties, and two check valve body are alternately in running order, and internal drainage liquid forms the loop in cavity, lubricated, cooling bearing 4, and can directly turn back to hydraulic circuit by check valve body.The passage that different height pressure oil is arranged between each entity, each joint have different oil pressure gap and sealing configuration thereof, help the unrestricted motion of motion auxiliary connection and the maintenance of motor normal working.
Flow dunnage in the present embodiment is being got in touch changes the hydraulic oil of stator cavity volume and thrust plate path, play in rotor and thrust plate are synchronized with the movement flow switching effect to high low pressure fluid, two locating stud pair commentaries on classics stators that link to each other with the flow dunnage and thrust plate carry out location positioning, to guarantee accurate flow relation.
The cycloidal engagement pair rotor curve of present embodiment as shown in Figure 2, rotor wherein is typical cycloidal curve, the normal section curve of its flank profil is the gerotor structure that tooth ends does not have flex point, so the secondary gear pin diameter of cycloidal-pin wheel can be bigger.The flex point of cycloidal curve is only at the highs and lows of flank profil.The tooth root of rotor internal spline partly faces the flank profil peak of rotor cycloid.This no flex point and big gear pin diameter structure more help changeing the working condition that the stator engagement pair can be born the high pressure high pulling torque, make its motion more steady.
The flow couple axle of present embodiment as shown in Figure 3, its two end part are the spline tooth structure of outer gearing, the two ends spline tooth is non-symmetry structure, promptly with the external spline teeth of rotor engaged and different with the external splines structure of thrust plate engagement, the spline parameter that the number of teeth at two ends is identical is different, promptly with the modulus of the external spline teeth of rotor engaged modulus greater than the external spline teeth of the other end and thrust plate engagement, but the relative position of its two ends spline teeth still is unique, is bearing motor essence flow relation really.
Facts have proved that the high pressure large torque 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 utility model 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 the utility model requirement.

Claims (8)

1. high pressure large torque cycloid hydraulic motor, comprise the body shell that is shaped on liquid entering hole and refluxing opening, described bonnet and stator and body shell are connected, an end is equipped with cycloidal-pin wheel pair and flow-distribution mechanism in the described body shell, the other end is equipped with output shaft, the rotor of described cycloidal-pin wheel pair is by the external gear engagement of internal spline and couple axle one end, the internal spline engagement of the external splines of the described couple axle the other end and output shaft the inner, the rotor of described cycloidal-pin wheel pair also meshes by the external gear of internal spline and flow couple axle one end, the internal spline of thrust plate engagement in the external splines of the described flow couple axle the other end and the flow-distribution mechanism is characterized in that: the contacting profile normal section curve of the secondary rotor of described cycloidal-pin wheel is the gerotor structure that tooth ends does not have flex point.
2. according to the described high pressure large torque cycloid hydraulic motor of claim 1, it is characterized in that: described flow couple axle two ends are non-symmetry structure, the number of teeth at two ends is identical, with the modulus of rotor engaged one end external spline teeth greater than meshing the modulus of an end external spline teeth with thrust plate.
3. according to claim 1 or 2 described high pressure large torque cycloid hydraulic motors, it is characterized in that: the flex point of described cycloidal curve is positioned at the highs and lows of described rotor engaged flank profil.
4. according to the described high pressure large torque cycloid hydraulic motor of claim 3, it is characterized in that: the tooth root of described rotor internal spline partly faces described rotor cycloidal profile peak.
5. according to the described high pressure large torque cycloid hydraulic motor of claim 4, it is characterized in that: be shaped on outer drain tap on the described body shell, the reservoir body of the internal leakage fluid of each gap oil film motion of described outer drain tap and motor is connected.
6. state the high pressure large torque cycloid hydraulic motor according to claim 5, 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 that is connected with oil inlet and outlet, the described two check valve body the other ends and two unidirectional valve openings converge, and a duct by stator is connected with outer drain tap.
7. according to the described high pressure large torque cycloid hydraulic motor of claim 6, it is characterized in that: described check valve body is made of the steel ball that is placed in the flow platen step hole.
8. according to the described high pressure large torque cycloid hydraulic motor of claim 7, it is characterized in that: two locating stud pair commentaries on classics stators that link to each other with the flow dunnage and thrust plate carry out location positioning.
CN 200720033329 2007-01-16 2007-01-16 High-pressure cycloidal hydraulic motor with large torsional moment Expired - Lifetime CN200996353Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200720033329 CN200996353Y (en) 2007-01-16 2007-01-16 High-pressure cycloidal hydraulic motor with large torsional moment

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102418657A (en) * 2011-12-27 2012-04-18 镇江大力液压马达有限责任公司 Axle flow-distribution cycloid hydraulic motor for rear shaft output
CN102588203A (en) * 2011-12-22 2012-07-18 镇江大力液压马达有限责任公司 Cycloidal hydraulic motor with multiple escape flow paths and multiple oil ports
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
WO2018103681A1 (en) * 2016-12-08 2018-06-14 镇江大力液压马达股份有限公司 Cycloid hydraulic motor
CN110630431A (en) * 2019-08-20 2019-12-31 江苏国瑞液压机械有限公司 Shaft flow distribution hydraulic motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588203A (en) * 2011-12-22 2012-07-18 镇江大力液压马达有限责任公司 Cycloidal hydraulic motor with multiple escape flow paths and multiple oil ports
CN102418657A (en) * 2011-12-27 2012-04-18 镇江大力液压马达有限责任公司 Axle flow-distribution cycloid hydraulic motor for rear shaft output
WO2018103681A1 (en) * 2016-12-08 2018-06-14 镇江大力液压马达股份有限公司 Cycloid hydraulic motor
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
CN110630431A (en) * 2019-08-20 2019-12-31 江苏国瑞液压机械有限公司 Shaft flow distribution hydraulic motor

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Granted publication date: 20071226

EXPY Termination of patent right or utility model