CN101672331A - Structure of constant velocity universal joint - Google Patents
Structure of constant velocity universal joint Download PDFInfo
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- CN101672331A CN101672331A CN200810120855A CN200810120855A CN101672331A CN 101672331 A CN101672331 A CN 101672331A CN 200810120855 A CN200810120855 A CN 200810120855A CN 200810120855 A CN200810120855 A CN 200810120855A CN 101672331 A CN101672331 A CN 101672331A
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- retainer
- universal joint
- spherical surface
- outer spherical
- constant velocity
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Abstract
The invention discloses a novel assembly structure of a constant velocity universal joint ball cage used for an automotive transmission system, which comprises a spherical shell (1), a retainer (2), astar-shaped sleeve (3), steel balls (4) and an outer spherical seat shaft (6). The inner spherical surface of the spherical shell (1) is connected with the outer spherical surface of the retainer (2), and the inner spherical surface of the retainer (2) is connected with the outer spherical surface of the star-shaped sleeve (3). The structure is characterized in that circular arcs of contact surfaces of the retainer (2) and the star-shaped sleeve (3) are changed, and the way that the radius of the circular arc at the middle section is larger than the radii of the circular arcs at two ends andthe circular arcs are smoothly connected is adopted. After the ball cage is assembled, gaps (7) and (8) at middle sections of the inner contact face and the outer contact surface of the retainer (2) are increased, and the abrasion is reduced; in addition, the structure is favorable for even dispersion of lubricating grease at the cavity of the constant velocity universal joint, increases the lubricating effect, promotes the comprehensive performance, and realizes promotion of torsional fatigue strength of an assembly by more than 20 percent. Meanwhile, the structure is easy to process and assemble, and relatively reduces the manufacturing cost.
Description
Technical field
The present invention relates to a kind of constant velocity universal joint ball cage new structure, specifically is a kind of novel assembly structure that is used for the constant velocity universal joint ball cage of automobile chassis drive system system.
Background technique
Automobile is the mechanical part that is contained in transmitting movement and moment of torsion between automobile differential or terminal reduction gear and the wheel with the constant velocity universal joint assembly, by two covers or a cover output shaft and input shaft to equal 1 instantaneous angular velocity than the transmitting movement of forming by constant velocity universal joint, jack shaft and other component of transmitting movement and moment of torsion, and the mechanical part of the energy synchronous change operating angle and the slippage of stretching.
Rzeppa universal joint is the constant velocity universal joint that is most widely used at present.Respectively have on the ball surface of the internal surface of spherical shell and star sleeve along equally distributed six the concentric arc raceways of circumference, six power transmission steel balls are housed between them, these steel balls are remained in the same plane by retainer.The raceway of spherical shell and star sleeve do decentraction, make its center of circle depart from the universal joint center symmetrically.Like this, even the between centers angle is 0 °, the intersection of inner, outer meridian raceway also can fix on the tram with steel ball.When the between centers angle was 0 °, the angle of the steel ball centrode of inside and outside raceway decision was a bit larger tham 11 °, and this is the minimum angles that can determine the steel ball tram reliably.The transverse section of raceway is oval, the line of the point of contact and the centre of sphere and the radial line angle at 45 of crossing the centre of sphere, oval 1.03～1.05 times of electing the steel ball radius in the radius of curvature at point of contact place as.When stand under load, the point of contact of steel ball and raceway is actually oval contact area.Since when work steel ball each direction transmitting torque of all having an opportunity, and because the cooperation of steel ball and ball cage is spherical, so should give enough attention to the lubricated effectiveness in the working procedure.The use of oiling agent depends primarily on the rotating speed and the angle of transmission, during up to 1500r/min, generally uses anti-corrosive grease at rotating speed, if when rotating speed and angle are all big, then uses lubricant oil.Reasonable method is to adopt oil bath and circulating oil lubrication, and should adopt multi-form seal arrangement according to the size of driving angle.The operating angle that this universal joint allows reaches 42 °, and limit interaxial angle can reach 45 °.Because six steel balls are worked simultaneously during transmitting torque, its bearing capacity and shock-resistant ability are strong, and efficient is higher, and compact dimensions is easy for installation.But the accuracy of manufacturing height of sphere that is in contact with one another and raceway, cost is higher.
The constant velocity universal joint working principle: when jack shaft (driving shaft) and outside when angle changes between the ball seat axle (driven shaft), power transmission steel ball center is positioned on the bisector plane of two crossed axis angles all the time, and the distance to two axial lines equates, thereby has guaranteed the angular velocity rotation of master and slave moving axis to equate.
The constant velocity universal joint of prior art, its structure is that spherical shell inner ball surface circular arc is identical with retainer outer spherical surface circular arc, both closely cooperate, retainer inner ball surface circular arc is identical with star sleeve outer spherical surface circular arc, both closely cooperate, on the retainer circumference, in uniform six windows a steel ball is installed respectively, move in the arc raceway that the corresponding raceway groove with star sleeve of raceway groove forms in spherical shell, the steel ball center is positioned on the bisector plane of two crossed axis angles all the time, by arc raceway inwall transmitting torque, guarantee of the angular velocity rotation of master and slave moving axis to equate.
Need frequent changes operating angle and speed based on constant velocity universal joint in running, and because of the Environmental Conditions difference, it is smooth and easy fluent, not easy to wear to require it to cooperate at aspect of performance, bearing capacity and shock-resistant ability are strong.
The constant velocity universal joint of prior art is because of the spherical shell inner ball surface closely contacts with the retainer outer spherical surface, the retainer inner ball surface closely contacts with the star sleeve outer spherical surface, and retainer self thickness is less, intensity is also little, particularly the intermediate portion ring is evenly distributed in six windows that are used to install steel ball, causes the retainer intermediate portion more fragile.Have following defective: wearing and tearing are bigger and inhomogeneous between spherical shell and retainer surface of contact, retainer and the star sleeve surface of contact, cause in the running unstable, produce abnormal sound or retardance, retainer is easily cracked, objectively reduced the working life of constant velocity universal joint assembly, prior art ball cage bug list cooperation now has some setbacks, and abnormal sound, retardance are arranged, and it is cracked that catastrophe failure shows as retainer.
Summary of the invention
The objective of the invention is to provide a kind of constant velocity universal joint of new structure, the constant velocity universal joint of preparation is high lubricating effect compared with prior art, and it is little to wear and tear, and is easy to assembling, low cost of manufacture, and combination property is better, longer service life.
For realizing purpose of the present invention, technical solution of the present invention is, novel structural design between a kind of constant velocity universal joint build-up member is provided, and changes build-up member contact position each other, reaches the purpose that improves the constant velocity universal joint combination property.Constant velocity universal joint is assembled by spherical shell, retainer, star sleeve and steel ball, and little based on retainer thickness, bulk strength is relatively low, and the intermediate portion is uniformly distributed with six hollow windows along the circumference and is used to install steel ball, and the intermediate portion is more fragile relatively.So ball cage new structure is around reducing the retainer wearing and tearing, keep its intensity and launch, embodiment is by changing the surface of contact circular arc of retainer, star sleeve, increase the gap between retainer intermediate portion and spherical shell inner ball surface and the star sleeve outer spherical surface, reach and reduce wearing and tearing, promote and lubricate, keep the purpose of intensity.
The constant velocity universal joint of employing the present invention preparation compared with prior art has the following advantages:
Owing to change retainer surface of contact circular arc and star sleeve ectosphere surface of contact circular arc, increased the gap between retainer intermediate portion and spherical shell and the star sleeve, the fragile relatively zone line of retainer has been avoided contacting with the spherical shell inner ball surface, also avoided contacting with the star sleeve outer spherical surface, thereby avoided wearing and tearing, kept bulk strength.Because of zone line gap between the three increases, be beneficial to the lubricating grease uniformly dispersing simultaneously, promote the lubricated effectiveness of constant velocity universal joint inner chamber, promoted combination property, the assembly torsional fatigue strength increases more than 20%, and the rate of fault reduction, has prolonged working life.By changing the surface of contact circular arc, reduce the requirement of parts accuracy of manufacturing relatively simultaneously, be easy to processing and assembling, reduced manufacture cost.
Owing to adopt new structure, promoted combination property, obtain the constant velocity universal joint of high quality, longer service life, thereby reduced the automobile user cost working life of having improved the CV joint for car assembly.Simultaneously, adopt the solution of the present invention, working process and technology controlling and process are reliable and easy to implement.
Description of drawings
Fig. 1 is the sectional structure schematic representation of prior art spherical shell.
Fig. 2 is facing and the sectional structure schematic representation of prior art retainer.
Fig. 3 is facing and the sectional structure schematic representation of prior art star sleeve.
Fig. 4 is the sectional structure schematic representation of prior art spherical shell and retainer assembling, retainer and star sleeve assembling.
Fig. 5 is the sectional structure schematic representation of prior art constant velocity universal joint assembly.
Fig. 6 is facing and the sectional structure schematic representation of retainer of the present invention.
Fig. 7 is facing and the sectional structure schematic representation of star sleeve of the present invention.
Fig. 8 is the sectional structure schematic representation of ball retainer of the present invention and the assembling of shape shell, retainer and star sleeve assembling.
Fig. 9 is the sectional structure schematic representation of the novel ball-cage constant velocity universal joint of the present invention assembly.
Shown in the figure
The component 101 of the spherical shell of prior art and retainer linkage structure, spherical shell, 102, retainer, 103, star sleeve, 104, steel ball, 105, jack shaft, 106, outer ball seat axle.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5.
Because of spherical shell 101 inner ball surface closely contact with retainer 102 outer spherical surfaces, retainer 102 inner ball surface closely contact with star sleeve 103 outer spherical surfaces, when relative slippage, influenced by various factors, can wear and tear and the generation metal fillings, damage sphere, and then influence the lubrication effect of surface of contact, when surface of contact circular arc machining accuracy is not enough, its wearing and tearing bigger and generation abnormal sound and retardance phenomenon, because of retainer 102 intensity relatively a little less than, block that retainer 102 may be cracked when serious, and may cause security incident.
As Fig. 6, Fig. 7, Fig. 8, shown in Figure 9.
The novel ball basket structure of the present invention, comprise that spherical shell 1 inner ball surface closely is connected with retainer 2 outer spherical surfaces, retainer 2 inner ball surface closely are connected with star sleeve 3 outer spherical surfaces, described retainer 2 outer spherical surface circular arcs are not continuous circular arcs, but be divided into three sections a, b, c, and both sides section circular arc a, c are consistent with spherical shell 1 inner ball surface circular arc, and its circular arc gap precision requires in 0.04mm, intermediate section circular arc b is big slightly, remains on 0.08～0.12mm with spherical shell 1 inner ball surface circular arc gap.Described star sleeve 3 outer spherical surface circular arcs are not continuous circular arcs, but be divided into three sections a ', b ', c ', both sides section circular arc a ', c ' are consistent with retainer 2 inner ball surface circular arcs, its circular arc gap precision requires in 0.04mm, b ' section circular arc is big slightly, remains on 0.08～0.12mm with retainer 2 inner ball surface circular arc gaps.When jack shaft (driving shaft) 5 and outside during variable angle between the ball seat axle (driven shaft) 6, spherical shell 1 inner ball surface and retainer 2 outer spherical surfaces produce slippage, when retainer 2 inner ball surface and star sleeve 3 outer spherical surfaces produce slippage, because of spherical shell 1 and retainer 2 surface of contact zone lines have gap 7, retainer 2 outer spherical surface intermediate sections zone does not contact with spherical shell 1 inner ball surface; Because of having gap 8 between retainer 2 and the star sleeve 3 surface of contact zone lines, retainer 2 inner ball surface zone lines do not contact with star sleeve 3 outer spherical surfaces.And because of there being gap 7,8, being beneficial to ball cage inner chamber lubricating grease and scattering evenly, promote lubrication effect, reduce wearing and tearing.For being evenly equipped with six window and relatively low retainers 2 of intensity that are used to install steel ball 4 on the circumference, its protective action is very obvious, total body extension constant velocity universal joint working life, reduce the automobile user cost, take precautions against the automotive safety accident.
New structure constant velocity universal joint assembly process is as follows:
1) spherical shell 1 folder is firm fixed, by the fit tolerance regulation, star sleeve 3 is inserted in the retainer 2, auxiliary with supporting rocking bar, be inserted in spherical shell 1 inside again, rocking bar rotates along circumference, detects matching gap between three parts.
2) will just assemble the ball cage of finishing and insert supporting fixedly rocking bar, and wave along circumference and detect degree of adaptability and radial-play.
3) detect axial float and other performance index with special purpose measuring instrument.
4) inject lubricating grease at qualified ball cage inner chamber, supporting suitable protective measures such as antirust.
Through above main process, the preparation of new structure constant velocity universal joint is finished.
Claims (3)
1, a kind of novel assembly structure that is used for the constant velocity universal joint ball cage of car transmissions, it comprises spherical shell (1), retainer (2), star sleeve (3) and outer ball seat axle (6), spherical shell (1) inner ball surface is connected with retainer (2) outer spherical surface, and retainer (2) inner ball surface is connected with star sleeve (3) outer spherical surface.It is characterized in that: spherical shell (1) inner ball surface circular arc is constant, changes the surface of contact circular arc of retainer (2) outer spherical surface and star sleeve (3) outer spherical surface, adopts the intermediate section radius of arc greater than the two ends radius of arc but smooth ways of connecting.After the assembling of ball cage, increased the gap of the inside and outside surface of contact intermediate section of retainer (2).
2, can change in proportion according to actual needs according to described C/V (2) the outer spherical surface zone line that is used for car transmissions of claim (1) and spherical shell (1) inner ball surface gap and retainer (2) inner ball surface zone line and star sleeve (3) outer spherical surface gap.
3, be 0.08～0.12mm according to described C/V (2) outer spherical surface zone line and spherical shell (1) the inner ball surface gap that is used for car transmissions of claim (2), (2) sphere zone line and star sleeve (3) outer spherical surface gap are 0.08～0.12mm in the retainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810120855A CN101672331A (en) | 2008-09-09 | 2008-09-09 | Structure of constant velocity universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810120855A CN101672331A (en) | 2008-09-09 | 2008-09-09 | Structure of constant velocity universal joint |
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| CN101672331A true CN101672331A (en) | 2010-03-17 |
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| CN200810120855A Pending CN101672331A (en) | 2008-09-09 | 2008-09-09 | Structure of constant velocity universal joint |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499914A (en) * | 2015-11-24 | 2016-04-20 | 芜湖天金机械有限公司 | Turning and milling process for universal joint ball shell |
| CN106917830A (en) * | 2015-12-25 | 2017-07-04 | 兴化市三诚精密锻造有限公司 | A kind of universal joint spherical shell fine forge piece |
| CN107061529A (en) * | 2017-05-24 | 2017-08-18 | 宁波纬尚汽车零部件有限公司 | A kind of cage spherical shell structure and its technique processing method |
| CN112426226A (en) * | 2020-11-18 | 2021-03-02 | 相丰朋 | Neurosurgery arm moving along with arm |
| CN113738780A (en) * | 2021-08-30 | 2021-12-03 | 杭州腾励传动科技股份有限公司 | Structural design method of high-strength retainer for ball cage type constant velocity universal joint |
-
2008
- 2008-09-09 CN CN200810120855A patent/CN101672331A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499914A (en) * | 2015-11-24 | 2016-04-20 | 芜湖天金机械有限公司 | Turning and milling process for universal joint ball shell |
| CN106917830A (en) * | 2015-12-25 | 2017-07-04 | 兴化市三诚精密锻造有限公司 | A kind of universal joint spherical shell fine forge piece |
| CN107061529A (en) * | 2017-05-24 | 2017-08-18 | 宁波纬尚汽车零部件有限公司 | A kind of cage spherical shell structure and its technique processing method |
| CN107061529B (en) * | 2017-05-24 | 2023-08-08 | 宁波纬尚汽车零部件有限公司 | Ball cage ball shell structure and technological treatment method thereof |
| CN112426226A (en) * | 2020-11-18 | 2021-03-02 | 相丰朋 | Neurosurgery arm moving along with arm |
| CN113738780A (en) * | 2021-08-30 | 2021-12-03 | 杭州腾励传动科技股份有限公司 | Structural design method of high-strength retainer for ball cage type constant velocity universal joint |
| CN113738780B (en) * | 2021-08-30 | 2022-06-17 | 杭州腾励传动科技股份有限公司 | Structural design method of high-strength retainer for ball cage type constant velocity universal joint |
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Open date: 20100317 |