CN206770439U - A kind of bell shell structure of drive shaft - Google Patents
A kind of bell shell structure of drive shaft Download PDFInfo
- Publication number
- CN206770439U CN206770439U CN201720587464.6U CN201720587464U CN206770439U CN 206770439 U CN206770439 U CN 206770439U CN 201720587464 U CN201720587464 U CN 201720587464U CN 206770439 U CN206770439 U CN 206770439U
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- Prior art keywords
- raceway groove
- main casing
- angle
- drive shaft
- arc
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Abstract
The utility model belongs to Automobile drive accessory technical field, provide a kind of bell shell structure of drive shaft and include main casing and axle portion body, raceway groove chamfer angle is diminished from left end to right-hand member, axle portion body includes spline part and rigid connector portion, there is cambered surface chamfering section between the left end and main casing of spline part, there is lower concave arc groove between the right-hand member of spline part and rigid connector portion.To ensure, in the position at center, to improve bearing capacity as far as possible when steel ball is turned round the utility model has the advantage of raceway groove chamfer angle, avoid causing ballistic work to reduce because temper brittleness occurs, overall torsional performance is strong, so as to ensure whole hardness requirement.
Description
Technical field
The utility model belongs to Automobile drive accessory technical field, is related to a kind of bell shell structure of drive shaft.
Background technology
In order that automobile power transmission, can use and arrive driving axis, it is at most ball cage type drive axle to use at present
Assembly, whether circular arc alley or liner ball road all preferably solve the problems, such as constant speed drive to such a driving axis, and pass
It is big to pass operating angle, efficiency high.The shortcomings that existing cage spherical shell structure is that whole housing interior structure setting is unreasonable, is caused
Automobile suffering in steering procedure, brings certain potential safety hazard in the process of moving, at the same when carrying out PROCESS FOR TREATMENT by
It is difficult to control and realizes in the improper hydraulic performance decline that can cause machine components of processing method and prior art, and drive shaft is bell
Shell transmits moment of torsion and has the place moved axially on a small quantity, is connected mostly using spline, spline structure of the prior art is set here
Put unreasonable, surface lubrication effect is poor, have impact on overall torsional performance.
The content of the invention
Technical problem to be solved in the utility model is the present situation for prior art, and a kind of rotation of offer is smooth,
Bearing capacity is good, ensures operation stability, intensity and the good bell shell structure of drive shaft and its technique processing method of hardness.
Technical scheme is used by the utility model solves above-mentioned technical problem：A kind of bell shell structure of drive shaft, bag
Main casing and axle portion body, described main casing and axle portion body integrally connected have been included, there is interior space body on the inside of described main casing,
Steel ball is arranged in interior space body, it is characterised in that described interior space body includes upper edge interference fit portion and lower space side
Along auxiliary section, steel ball auxiliary section is offered along between interference fit portion and lower space edge auxiliary section on top, in described steel
Raceway groove is provided with ball auxiliary section, there is raceway groove chamfering on raceway groove, described raceway groove chamfer angle is diminished from left end to right-hand member, institute
The axle portion body stated includes spline part and rigid connector portion, has cambered surface between the left end and main casing of described spline part
The right-hand member joint face composition hardened area of chamfering section, described spline part and main casing, the right-hand member of described spline part and fixation
There is lower concave arc groove between fixture body, fixed slotted eye, described fixing groove are longitudinally offered in described rigid connector portion
The angle on the notch both ends edge in hole is 60 degree.
In a kind of above-mentioned bell shell structure of drive shaft, what described lower space edge auxiliary section included being sequentially connected enters
Mouthful inclined portion, arc lower portion, lower expansion mouth and upper oblique connecting portion, the arc in described arc lower portion is to angle and raceway groove lower surface
Arc is consistent to angle, and the described upper tiltedly angle of connecting portion and vertical direction is 30 °.
In a kind of above-mentioned bell shell structure of drive shaft, described upper edge interference fit portion is upper including being sequentially connected
Curved portions, upper expansion mouth and oblique connecting portion, described upper curved portions and the arc of raceway groove upper surface are consistent to angle.
The measure taken for optimization such scheme specifically includes：
A kind of technique processing method of the bell shell structure of drive shaft, comprises the following steps：
Step 1: the outer wall of the embryo material of main casing is lathed into main casing by lathe, the inwall of embryo material is lathed in
Space body, then whole embryo material is carried out into heating carry out axle portion body carrying out finish forge, finish forge be by extrusion molding of axle portion body, or
Axle portion body portion is secondary forming, that is, is shaped spline part, then upsetting rigid connector portion；
Step 2: interior space bulk channel is carried out into turnning and milling by lathe, and cambered surface chamfering section and recessed is milled out in spline part
Arc groove, then rigid connector portion is put into mould and carries out the fixed slotted eye of cold extrusion extrusion；
Step 3: hardness processing will be carried out through the good embryo material of milling in step 2；
Step 4: end flat is ground by grinder first and then to ditch through step 3 hardness processing embryo material
Road is ground, the axle portion body of embryo material is ground again, is finally ground finished product to the interior space body of embryo material；
Step 5: to spline part is put into an oiling die cavity, carry out applying spline lubrication oil processing using injection.
In a kind of technique processing method of the above-mentioned bell shell structure of drive shaft, the embryo material of described main casing is
25Cr2Ni4MoV is firm, and embryo material is put into carburizing medium is heated to 850-920 DEG C as follows by described hardness processing step first,
Composition has carburized layer, is then incubated, and then embryo material 25Cr2Ni4MoV hardness is more than or equal to 26HRC, embryo material tissue by normalizing
In there is pearlite and upper bainite, wherein embryo material is heated into the first temperature, first temperature is at least above embryo material
More than 50 DEG C of 25Cr2Ni4MoV critical-temperature, the first temperature range are 850~880 DEG C, secondly by decomposition normalized structure
Part pearlite and upper bainite, embryo material hardness is adjusted in 20~26HRC, wherein temperature is second temperature, second
Temperature is chosen according to the hardness after first step normalizing, and when hardness range is 26~30HRC after normalizing, second temperature scope is
640~660 DEG C, when hardness range is 31~33HRC after normalizing, second temperature scope is 590~610 DEG C, hard after normalizing
Degree >=34HRC, second temperature scope are 570~590 DEG C, and finally tempering is quickly cooled down after coming out of the stove by water cooling, cool time 1
Minute, material leaving water temperature is 150 DEG C.
It is described that embryo material is being heated to first in a kind of technique processing method of the above-mentioned bell shell structure of drive shaft
Also need quickly to be cooled down after temperature, cool time, surface temperature was less than after embryo material 25Cr2Ni4MoV goes out cooling in 2 minutes
250℃。
In a kind of technique processing method of the above-mentioned bell shell structure of drive shaft, C in described 25Cr2Ni4MoV steel
Weight ratio is 0.22-0.30%, and Si weight ratio is 0.15-0.30%, and Mn weight ratio≤0.50%, Cr weight ratio is 1.40-
2.00%, Ni 3.25-4.00%, Mo weight ratio are 0.30-0.60%, and V weight ratio is 0.05-0.15%, Cu weight ratio
≤ 0.20%, S weight ratio≤0.015%, P weight ratio≤0.015%.
In a kind of technique processing method of the above-mentioned bell shell structure of drive shaft, described axle portion body deformation extent is
52%~59%, described spline part deformation extent is 13%~19%.
In a kind of technique processing method of the above-mentioned bell shell structure of drive shaft, described lubricating oil is to include 40 DEG C
Kinematic viscosity be 10~200mm2/s mineral have and 0.1~10 mass % solid powder insoluble in base oil, it is described
Solid powder be selected from organic-molybdenum, tetrafluoroethylene resin, melamine cyanurate, molybdenum disulfide, graphite and dialkyl group two
At least one of group that metal thiocarbamates salt is formed.
Compared with prior art, the utility model has the advantage of：Raceway groove chamfer angle causes when steel ball is turned round
It can ensure, in the position at center, to improve bearing capacity, uneven phase upper bainite and high density pearlite can be decomposed as far as possible,
Hardness is adjusted to 20~26HRC, part uses quick water cooling after tempering is come out of the stove, and avoids temper brittleness, is ensureing high intensity
While obtain higher low-temperature impact toughness.Tempering uses rapid cooling after coming out of the stove, and avoids causing ballistic work because temper brittleness occurs
Reduce, overall torsional performance is strong, so as to ensure whole hardness requirement.
Brief description of the drawings
Fig. 1 is this drive shaft clutch can structural representation；
Fig. 2 is the technique processing method flow chart of the bell shell structure of this drive shaft.
Embodiment
It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these embodiments.
In figure, main casing 1；Axle portion body 2；Interior space body 3；Upper edge interference fit portion 4；Lower space edge auxiliary section 5；Ditch
Road 6；Raceway groove chamfering 7；Spline part 8；Rigid connector portion 9；Cambered surface chamfering section 10；Lower concave arc groove 11；Fixed slotted eye 12；Entrance is oblique
Portion 13；Arc lower portion 14；Lower expansion mouth 15；Upper oblique connecting portion 16；Upper curved portions 17；Upper expansion mouth 18；Oblique connecting portion 19.
As shown in figure 1, the bell shell structure of this drive shaft, includes main casing 1 and axle portion body 2, main casing 1 and axle portion body 2
Integrally connected, the inner side of main casing 1 have interior space body 3, and steel ball is arranged in interior space body 3, and it is empty that interior space body 3 includes upper edge
Between auxiliary section 4 and lower space edge auxiliary section 5, offered on top along between interference fit portion 4 and lower space edge auxiliary section 5
Steel ball auxiliary section, raceway groove 6 is provided with steel ball auxiliary section, there is raceway groove chamfering 7 on raceway groove 6, the angle of raceway groove chamfering 7 is by left end
Diminish to right-hand member, be so on the one hand to the loading for facilitating steel ball, because the angle of raceway groove chamfering 7 is diminished from left end to right-hand member,
The raceway groove chamfering 7 to diminish can be limited steel ball again so that can be ensured at center as far as possible when steel ball is turned round
Position, bearing capacity is improved, so as to ensure that the stability of rotation, axle portion body 2 includes spline part 8 and rigid connector portion
9, there is cambered surface chamfering section 10, the right-hand member joint face of spline part 8 and main casing 1 forms between the left end and main casing 1 of spline part 8
Hardened area, there is lower concave arc groove 11 between the right-hand member of spline part 8 and rigid connector portion 9, pass through cambered surface chamfering section 10 here
It can ensure the moment of torsion after being fixedly mounted with other parts with lower concave arc groove 11, ensure the stability of operation, rigid connector
Fixed slotted eye 12 is longitudinally offered in portion 9, the angle on the notch both ends edge of fixed slotted eye 12 is 60 degree.
Lower space edge auxiliary section 5 include be sequentially connected entrance inclined portion 13, arc lower portion 14, lower expansion mouth 15 and on
Oblique connecting portion 16, the arc in arc lower portion 14 are consistent to angle and the arc of the lower surface of raceway groove 6 to angle, upper tiltedly connecting portion 16 and
The angle of vertical direction be 30 °, upper edge interference fit portion 4 include be sequentially connected upper curved portions 17, upper expansion mouth 18 and
Oblique connecting portion 19, upper curved portions 17 and the arc of the upper surface of raceway groove 6 are consistent to angle, so increase the activity of lower medial surface
Space so that steel ball smooth can be run.
As shown in Fig. 2 in order that the moment of torsion for obtaining the intensity of the whole bell shell structure of drive shaft, toughness and splined shaft is stronger
More preferably, the technique processing method step of the bell shell structure of drive shaft is as follows：Step 1: by lathe by the embryo material of main casing 1
Outer wall is lathed main casing 1, is lathed interior space body 3 to the inwall of embryo material, then whole embryo material is carried out into heating and carries out axle portion body 2
Finish forge is carried out, finish forge is that 2 extrusion moldings of axle portion body, or the part of axle portion body 2 are secondary forming, that is, is shaped spline part 8,
Upsetting rigid connector portion 9 again, the deformation extent of axle portion body 2 are 52%~59%, and the deformation extent of spline part 8 is 13%~19%；Step
Rapid two, the interior raceway groove 6 of space body 3 is carried out by turnning and milling by lathe, and cambered surface chamfering section 10 and lower concave arc groove is milled out in spline part 8
11, then rigid connector portion 9 is put into mould and carries out the fixed slotted eye 12 of cold extrusion extrusion；Step 3: will be through milling in step 2
Good embryo material carries out hardness processing, and the embryo material of main casing 1 is that 25Cr2Ni4MoV is firm here, C weight in 25Cr2Ni4MoV steel
Than being 0.15-0.30% for 0.22-0.30%, Si weight ratio, Mn weight ratio≤0.50%, Cr weight ratio is 1.40-2.00%,
Ni is 3.25-4.00%, and Mo weight ratio is 0.30-0.60%, and V weight ratio is 0.05-0.15%, Cu weight ratio≤
0.20%, S weight ratio≤0.015%, P weight ratio≤0.015%, hardness processing step is following to be put into carburizing Jie by embryo material first
850-920 DEG C is heated in matter, composition has carburized layer, is then incubated, then makes embryo material 25Cr2Ni4MoV hardness big by normalizing
In equal to 26HRC, there is pearlite and upper bainite in embryo material tissue, wherein embryo material is heated to the first temperature, described first
More than 50 DEG C of critical-temperature of the temperature at least above embryo material 25Cr2Ni4MoV, the first temperature range is 850~880 DEG C, secondly logical
The part pearlite and upper bainite decomposed in normalized structure is crossed, embryo material hardness is adjusted in 20~26HRC, wherein temperature
For second temperature, second temperature is chosen according to the hardness after first step normalizing, when hardness range is 26~30HRC after normalizing,
Second temperature scope is 640~660 DEG C, and when hardness range is 31~33HRC after normalizing, second temperature scope is 590~610
DEG C, hardness >=34HRC after normalizing, second temperature scope is 570~590 DEG C, by the fast quickly cooling of water cooling after finally tempering is come out of the stove
But, cool time is 1 minute, and material leaving water temperature is 150 DEG C；Also need to carry out fast quickly cooling after embryo material to be heated to the first temperature
But, cool time, surface temperature was less than 250 DEG C after embryo material 25Cr2Ni4MoV goes out cooling in 2 minutes；Step 4: through step 3
Hardness processing embryo material is ground to end flat by grinder and then raceway groove 6 is ground, again to the axle of embryo material first
Portion's body 2 is ground, is finally ground finished product to the interior space body 3 of embryo material；Step 5: to spline part 8 is put into an oiling
In die cavity, carry out applying spline lubrication oil processing using injection, lubricating oil be include 40 DEG C of kinematic viscosity be 10~
200mm2/s mineral have and 0.1~10 mass % solid powder insoluble in base oil, solid powder be selected from organic-molybdenum,
Tetrafluoroethylene resin, melamine cyanurate, molybdenum disulfide, graphite and dialkyldithiocarbamacompositions metal salt are formed
At least one of group.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from it is of the present utility model spirit defined in scope.
Claims (3)
1. a kind of bell shell structure of drive shaft, include main casing and axle portion body, described main casing and axle portion body integrally connected,
There is interior space body on the inside of described main casing, steel ball is arranged in interior space body, it is characterised in that described interior space body bag
Upper edge interference fit portion and lower space edge auxiliary section are included, on top along between interference fit portion and lower space edge auxiliary section
Steel ball auxiliary section is offered, raceway groove is provided with described steel ball auxiliary section, there is raceway groove chamfering, described raceway groove on raceway groove
Chamfer angle is diminished from left end to right-hand member, and described axle portion body includes spline part and rigid connector portion, described spline
There is the right-hand member joint face composition quenched zone of cambered surface chamfering section, described spline part and main casing between the left end and main casing in portion
Domain, has a lower concave arc groove between the right-hand member of described spline part and rigid connector portion, in described rigid connector portion longitudinal direction
Fixed slotted eye is offered, the angle on the notch both ends edge of described fixation slotted eye is 60 degree.
2. the bell shell structure of a kind of drive shaft according to claim 1, it is characterised in that described lower space edge coordinates
Portion includes the entrance inclined portion, arc lower portion, lower expansion mouth and the upper oblique connecting portion that are sequentially connected, the arc in described arc lower portion to
Angle and the arc of raceway groove lower surface are consistent to angle, and the described upper tiltedly angle of connecting portion and vertical direction is 30 °.
A kind of 3. bell shell structure of drive shaft according to claim 2, it is characterised in that described upper edge interference fit
Portion includes upper curved portions, upper expansion mouth and the oblique connecting portion being sequentially connected, described upper curved portions and raceway groove upper surface
Arc is consistent to angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720587464.6U CN206770439U (en) | 2017-05-24 | 2017-05-24 | A kind of bell shell structure of drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720587464.6U CN206770439U (en) | 2017-05-24 | 2017-05-24 | A kind of bell shell structure of drive shaft |
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| Publication Number | Publication Date |
|---|---|
| CN206770439U true CN206770439U (en) | 2017-12-19 |
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|---|---|---|---|
| CN201720587464.6U Expired - Fee Related CN206770439U (en) | 2017-05-24 | 2017-05-24 | A kind of bell shell structure of drive shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120357A (en) * | 2017-05-24 | 2017-09-01 | 宁波纬尚汽车零部件有限公司 | A kind of bell shell structure of drive shaft and its technique processing method |
-
2017
- 2017-05-24 CN CN201720587464.6U patent/CN206770439U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120357A (en) * | 2017-05-24 | 2017-09-01 | 宁波纬尚汽车零部件有限公司 | A kind of bell shell structure of drive shaft and its technique processing method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 |