CN201407294Y - Fixed constant-velocity universal joint with oil groove - Google Patents
Fixed constant-velocity universal joint with oil groove Download PDFInfo
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- CN201407294Y CN201407294Y CN2009203027369U CN200920302736U CN201407294Y CN 201407294 Y CN201407294 Y CN 201407294Y CN 2009203027369 U CN2009203027369 U CN 2009203027369U CN 200920302736 U CN200920302736 U CN 200920302736U CN 201407294 Y CN201407294 Y CN 201407294Y
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- oil groove
- universal joint
- overcoat
- steel ball
- constant velocity
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Abstract
The utility model relates to a universal joint for connection of front and back wheel transmission shafts of a vehicle or other mechanical transmission devices, in particular to a fixed constant-velocity universal joint for connection of front wheel driving and steering devices for a vehicle. The utility model aims to provide a fixed constant-velocity universal joint having good lubricating conditions and prolonged service life and provided with an oil groove. The fixed constant-velocity universal joint provided with the oil groove is provided with a clock-shaped jacket and a star-shaped sleeve, wherein a plurality of circular trenches are respectively formed on the inner surface of the jacket and the outer surface of the star-shaped sleeve, steel balls are arranged in the trenches, and aretainer for fixing the relative position of the steel balls is arranged among the steel balls; and first oil grooves are formed at the bottoms of the trenches on the inner surface of the jacket. Thegood lubricating conditions inside the universal joint are kept due to the arrangement of the oil groove, therefore, the service life is prolonged.
Description
Technical field
The front and back wheels transmission shaft that the utility model relates to automobile or other mechanical transmissions connects, and particularly a kind of automobile turns to the fixed type constant velocity cardan joint of connection with front-wheel drive.
Background technique
Since 1886 are born first automobile, there is the compact car (car) more than 80% all to adopt front-wheel drive, in front-wheel drive, the front-wheel of automobile is a driving wheel, is again deflecting roller.As deflecting roller, require wheel in the several angle scope, to arrive some angles by any beat, to satisfy the demand of motor turning.As driving wheel, then require transmission shaft in the wheel deflection, power to be delivered to wheel from gearbox, do not overlap at such two axis, and the mechanism that transmits power between the diaxon that also often changes of relative position is the vehicle front transmission shaft or be live axle.It is made up of the fixed type constant velocity cardan joint of road wheel end, the portable constant velocity universal joint and the middle axostylus axostyle of gearbox end.Before the seventies, front-wheel cross formula universal joint and hookes-type universal joint, but its structure transmission efficiency and stationarity are poor.After the seventies, the constant angular velocity universal joint occurred, shown in Fig. 1, Fig. 2 and Fig. 2-1, Fig. 2-2, its advantage is that the angular velocity of input is consistent forever with the angular velocity of output, has improved the stationarity and the travelling comfort of automobile greatly, and transmission efficiency reaches also and improves a lot.By the development of three more than ten years, each manufacturer has done a lot of research to constant velocity universal joint, has improved its pendulum angle and flexible performance again greatly.Along with the raising greatly of automobile production amount, its cost of production reduces greatly, has been large-scale production simultaneously.
There is each constant velocity universal joint manufacturer all the constant velocity universal joint life-span to be done many research at present, how economical with materials, how to boost productivity, how to improve the life-span, but the life-span of fixed type constant velocity cardan joint is well below the life-span of mobile terminal universal joint, in general, the life-span of fixed universal joint is about 1/3 of the mobile terminal universal joint life-span, can prove this point from the demand of keeping in repair these two kinds of universal joints of market.Britain GKN company has done particular study to the grease that the fixed universal joint is used in recent years, has improved the high temperature lubricating performance of grease, has also improved the life-span of fixed universal joint, but also is far from reaching the life-span of mobile terminal universal joint.Japan NKN is increased to eight raceway grooves to six raceway grooves of constant velocity universal joint, so just alleviates the stressed of single steel ball, but reality proof life-span increase rate is little.
The present main failure mechanism of constant velocity universal joint as shown in Figure 3 and Figure 4, the j1 place is overcoat 1 and retainer 3 frequent contacting point when relative movement among Fig. 3, frequent contacting point when the j2 place is steel ball 4 and retainer 3 motions among the figure, j3 is star sleeve 2 frequent contacting point during with retainer 3 motions among the figure, among Fig. 4 t1, t2 and t3, t4 be respectively steel ball in raceway groove in the to-and-fro motion process with the contacting point of raceway groove.So frequent contact adds that insufficient lubrication promptly causes component failure, as Fig. 5, Fig. 6 and shown in Figure 7,1), overcoat raceway groove both sides miter angle direction produces depression or erosion point (S2 place among the figure) the long-term inefficacy schematic representation that produces after the rubbing contact under lacking lubricating condition:, the inner ball surface front end has (S1 places among the figure) such as plucking or depressions; 2), star sleeve raceway groove miter angle direction produces depression or erosion point (S3 place among the figure); 3), the retainer window outboard face produces pit (S4 place among the figure).
The design deficiency that produces such failure cause and be by the fixed universal joint causes, mainly contain following some:
1), the normal use of transmission shaft at present and have that rotational efficienty reaches about 98.5% under the good lubricating condition, 1.5% energy consumption is at transmission shaft self, wherein 3/4 consumption is on fixed type constant velocity cardan joint, it will change into heat, make the universal joint heating, this will influence the greasy property of grease.Long-time high temperature, grease is lost greasy property easily, also solidifies easily, does not have flowability, and constant velocity universal joint can not get good lubrication and causes damage.
2), retainer outer surface and overcoat internal surface surface of contact be big, in transmission process, retainer is subjected to steel ball that an outside thrust is arranged, make retainer outside before hemisphere face tightly agree with on the preceding hemisphere face of overcoat internal surface (as shown in Figure 3).And retainer is being made reciprocally swinging, lubricating grease is almost all wiped off to the rib mouth of retainer window, surface of contact between itself and the overcoat is had to grease lubrication seldom, this will cause these part wearing and tearing to accelerate, the steel ball center of getting off for a long time also can't guarantee in same plane, thereby influence the movement locus of steel ball, discontinuity between each component is aggravated the wearing and tearing and the damage of other parts.
3), along the raceway groove to-and-fro motion, because of the restriction of institute's retainer and raceway groove, in the transmission of angle, general steel ball is not rolling-operation completely in raceway groove to steel ball, often does the slip that 2-4mm does not wait on the retainer window in constant velocity universal joint.And stressed big, steel ball is easy to grease is squeezed away, and after using certain hour, raceway groove does not have grease lubrication, and steel ball and overcoat, star sleeve channel junction contact are easy to produce erosion point or depression so.Although universal joint manufacturing enterprise has made Gothic to the raceway groove cross section at present, steel ball and raceway groove contact are placed on the miter angle direction, steel ball and bottom of trench stay the gap (shown in d1 among Fig. 2-2) of 0.02-0.08mm, come lubricating grease without interruption, in theory can life-saving, but in fact too small because of the gap, can't continuous lubrication, actual effect is not obvious.If amplify in the gap, steel ball and raceway groove surface of contact are too small, can cause wearing and tearing to be accelerated, and the life-span is shorter.
4), constant velocity universal joint is a high-precision part, matching gap is very little, in rotation process, because of can't utilizing rotatory inertia because of the flowability difference, the grease of die cavity inside supplies on the fitting surface, cause surface friction drag to increase, transmission efficiency obviously descends, and causes universal joint heating phenomenon serious, thereby the universal joint life-span is reduced.
Comprehensive above some shortcoming has a general character, and present fixed type constant velocity cardan joint is exactly a poor lubrication, causes the life-span short, if good lubricating condition can be provided, just can prolong the working life of universal joint greatly.
The model utility content
The purpose of this utility model is to provide a kind of fixed type constant velocity cardan joint of the band oil groove that possesses the good lubrication condition and then prolong working life.
Technical solutions of the utility model are as follows:
A kind of fixed type constant velocity cardan joint with oil groove, have bell overcoat and star sleeve, be respectively equipped with several ring raceway grooves on the internal surface of above-mentioned overcoat and the outer surface of star sleeve, be provided with steel ball in the raceway groove, be provided with the retainer of stationary balls relative position between the steel ball; The raceway groove bottom of trench of above-mentioned overcoat internal surface is provided with first oil groove.
The above-mentioned first oil groove width is the 1/5-1/4 of steel ball size, and the degree of depth is 0.35-0.5mm.
The raceway groove bottom of trench of above-mentioned star sleeve outer surface is provided with second oil groove.
The above-mentioned second oil groove width is the 1/5-1/4 of steel ball size, and the degree of depth is 0.25mm.
The overcoat internal surface of above-mentioned overcoat and retainer contacting part is provided with the 3rd oil groove.
Above-mentioned the 3rd oil groove width is 2.5-4mm, and the degree of depth is 0.5-1mm.
The retainer outer surface of above-mentioned retainer and overcoat contacting part is provided with oil groove.
The outstanding characteristics of the utility model are owing to offer oil groove on overcoat, star sleeve or the retainer of constant velocity universal joint, guarantee that lubricant grease can enter the surface of contact that above-mentioned part and steel ball move mutually along oil groove, keeps the good lubrication condition of universal joint inside; And offer oil groove on the surface of contact of retainer and overcoat and can reduce each other area of contact, the frictional force when having reduced the retainer swing more; In addition for the production and processing of universal joint, the existence of raceway groove inner oil sump also helps the mill processing of raceway groove, not only reduced grinding face, and make the processing grinding wheel cool condition better, can prevent the burn that channel surface produces because of grinding, improve the surface hardness of raceway groove surface of contact, improved the quality of processing of fixed type constant velocity cardan joint from another aspect.
Description of drawings
Fig. 1 is the axial section schematic representation of fixed universal joint before improving.
Fig. 2 is the radial section schematic representation of Fig. 1.
Fig. 2-1 is an A place enlarged diagram among Fig. 2.
Fig. 2-2 is a B place enlarged diagram among Fig. 2.
Fig. 3 contacts with each other place's schematic representation for each part in the universal joint working procedure among Fig. 1.
Fig. 4 in the steel ball to-and-fro motion process among Fig. 1 with raceway groove be in contact with one another place's schematic representation.
Fig. 5 is a universal joint overcoat wear out failure schematic representation among Fig. 1.
Fig. 6 is a universal joint star sleeve wear out failure schematic representation among Fig. 1.
Fig. 7 is a universal joint retainer wear out failure schematic representation among Fig. 1.
Fig. 8 is the utility model universal joint overcoat inner surface structure schematic representation.
Fig. 9 is the utility model star sleeve outer surface structure schematic representation.
Figure 10 is the utility model axial section schematic representation.
Figure 11 is the radial section schematic representation of Figure 10.
Figure 11-1 is a C place enlarged diagram among Figure 11.
Figure 11-2 is a D place enlarged diagram among Figure 11.
Figure 12 is the utility model motion state structural representation.
Embodiment
See Fig. 8, Fig. 9 and Figure 10, the fixed type constant velocity cardan joint of the utility model band oil groove has bell overcoat 1, star sleeve 2, retainer 3 and steel ball 4, all be provided with the ring raceway groove that holds steel ball on the outer surface of above-mentioned overcoat internal surface and star sleeve, retainer is between overcoat and star sleeve, circumferencial direction is provided with window consistent with steel ball number, its effect is the position of stationary balls, guarantees that steel ball all is in the same plane during to-and-fro motion in raceway groove.Steel ball 4 reciprocating central point O are positioned on the universal joint central axis as shown in figure 10, star sleeve 2, overcoat 1 and retainer 3 in the universal joint working procedure mutually between swing, turn to function to realize universal joint place live axle.
See Fig. 8, Fig. 9 and Figure 11, the raceway groove ditch bottom of overcoat 1 is provided with first oil groove 11, is provided with the 3rd oil groove 12 on overcoat and retainer surface of contact, and the raceway groove bottom of trench of star sleeve 2 is provided with second oil groove 21.The good lubrication of universal joint inside has been guaranteed in the existence of first and second oil groove, even under universal joint high speed rotating state, still can there be enough lubricant greases to be provided in the running orbit of steel ball and overcoat and star sleeve raceway groove, improve the working life of steel ball, also effectively prevented the premature failure of overcoat, star sleeve raceway groove; The existence of the 3rd oil groove between overcoat and the retainer has guaranteed the good lubrication between retainer and the overcoat, can prevent overcoat and retainer contacting point surface premature failure.Above-mentioned the 3rd oil groove also can substitute with the oil groove that is located on the retainer, can play equally retainer and overcoat surface of contact good lubrication effect.
Figure 11-1 and Figure 11 the-the 2nd, the part enlarged diagram of Figure 11, shown in first, second and third oil groove offer the centre that lays respectively at overcoat raceway groove bottom of trench, centre and the overcoat and the retainer surface of contact neutral position of star sleeve raceway groove bottom of trench.The size of set oil groove is relevant with used steel ball 4 sizes of universal joint, the width of first oil groove is the 1/5-1/4 of steel ball size, the degree of depth is between the 0.35-0.5mm, the width of second oil groove is the 1/5-1/4 of steel ball size, the degree of depth is 0.25mm, the width of the 3rd oil groove is 2.5-4mm, and the degree of depth is 0.5-1mm, and concrete steel ball size-oil groove size relationship sees the following form:
See Figure 10 and Figure 12, Figure 12 is the utility model universal joint schematic representation in working order, and steel ball is swung in raceway groove with central point O, and steel ball remains in movement process in the same plane.During star sleeve 2 swings, retainer and steel ball were swung 1/2 α angle, and generally between the 0-50 degree, by the steering operation of the to-and-fro motion realization driving wheel of vehicle of steel ball in raceway groove, the size of α also is the angle of Vehicular turn to the scope of α.
Above table has been enumerated the regular size size of vehicle traction with fixed type constant velocity cardan joint, the actual proof of using, when adopting oil groove setting described in the utility model, and design is when as above showing listed size, the lubrication effect of universal joint improves greatly, has prolonged 40%-50% working life.
Claims (7)
1. fixed type constant velocity cardan joint with oil groove, have bell overcoat (1) and star sleeve (2), be respectively equipped with several ring raceway grooves on the internal surface of above-mentioned overcoat and the outer surface of star sleeve, be provided with steel ball (4) in the raceway groove, be provided with the retainer (3) of stationary balls relative position between the steel ball; It is characterized in that: the raceway groove bottom of trench of above-mentioned overcoat (1) internal surface is provided with first oil groove (11).
2. the fixed type constant velocity cardan joint of band oil groove according to claim 1 is characterized in that: above-mentioned first oil groove (11) width is the 1/5-1/4 of steel ball (4) diameter, and the degree of depth is 0.35-0.5mm.
3. the fixed type constant velocity cardan joint of band oil groove according to claim 2 is characterized in that: the raceway groove bottom of trench of above-mentioned star sleeve (2) outer surface is provided with second oil groove (21).
4. the fixed type constant velocity cardan joint of band oil groove according to claim 3 is characterized in that: above-mentioned second oil groove (21) width is the 1/5-1/4 of steel ball (4) diameter, and the degree of depth is 0.25mm.
5. the fixed type constant velocity cardan joint of band oil groove according to claim 4 is characterized in that: above-mentioned overcoat (2) is provided with the 3rd oil groove (12) with the overcoat internal surface of retainer (3) contacting part.
6. the fixed type constant velocity cardan joint of band oil groove according to claim 5 is characterized in that: above-mentioned the 3rd oil groove (12) width is 2.5-4mm, and the degree of depth is 0.5-1mm.
7. the fixed type constant velocity cardan joint of band oil groove according to claim 4 is characterized in that: above-mentioned retainer (3) is provided with oil groove with the retainer outer surface of overcoat (1) contacting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203027369U CN201407294Y (en) | 2009-04-30 | 2009-04-30 | Fixed constant-velocity universal joint with oil groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203027369U CN201407294Y (en) | 2009-04-30 | 2009-04-30 | Fixed constant-velocity universal joint with oil groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201407294Y true CN201407294Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203027369U Expired - Fee Related CN201407294Y (en) | 2009-04-30 | 2009-04-30 | Fixed constant-velocity universal joint with oil groove |
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| Country | Link |
|---|---|
| CN (1) | CN201407294Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443599A (en) * | 2015-12-22 | 2016-03-30 | 万向钱潮重庆汽车部件有限公司 | Constant-speed driving shaft ball cage assembly with good lubrication performance |
| CN117145884A (en) * | 2023-10-31 | 2023-12-01 | 万向钱潮股份公司 | Ball cage universal joint housing, ball cage universal joint and vehicle |
-
2009
- 2009-04-30 CN CN2009203027369U patent/CN201407294Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443599A (en) * | 2015-12-22 | 2016-03-30 | 万向钱潮重庆汽车部件有限公司 | Constant-speed driving shaft ball cage assembly with good lubrication performance |
| CN117145884A (en) * | 2023-10-31 | 2023-12-01 | 万向钱潮股份公司 | Ball cage universal joint housing, ball cage universal joint and vehicle |
| CN117145884B (en) * | 2023-10-31 | 2024-02-06 | 万向钱潮股份公司 | Ball cage universal joint housing, ball cage universal joint and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20120430 |