CN205207583U - Automobile drive axle differential mechanism containing unit device of high strength - Google Patents
Automobile drive axle differential mechanism containing unit device of high strength Download PDFInfo
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- CN205207583U CN205207583U CN201520756920.6U CN201520756920U CN205207583U CN 205207583 U CN205207583 U CN 205207583U CN 201520756920 U CN201520756920 U CN 201520756920U CN 205207583 U CN205207583 U CN 205207583U
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- tapered roller
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- roller bearing
- drive axle
- cell arrangement
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Abstract
The utility model provides an automobile drive axle differential mechanism containing unit device of high strength, is equipped with: two and half left and right casings of differential mechanism and connecting bolt, two tapered roller bearing, be arranged in half right casing outside peripheral with the indent centre from driving wheel and casing. Two and half left and right casings are connected as an organic wholely with the tapered roller bearing inner circle of tail end respectively, and half right casing still becomes the integration part with spiral bevel gear from dynamic wheel group. Wherein, it all is that the processing of accurate die forging plastic forming technology is the part blank to have half casing on the left side of tapered roller bearing inner circle, half casing on the right side that has tapered roller bearing inner circle and spiral bevel gear follow driving wheel and well casing, makes through thermal treatment technology and cutting process. The tapered roller bearing outer lane outer diameter remain unchanged, if the tapered roller diameter of bearing increases slightly or remains unchanged, then bearing inner race thickness is corresponding remains unchanged or the buildup thickness to strengthen the mechanical properties of this differential mechanism containing unit device. The the device dead weight is light, can improve car delivery performance and life.
Description
Technical field
The utility model relates to a kind of automobile drive axle differential housing cell arrangement of high strength, belongs to the technical field of the optimizing structure design of the main constituent elements of automobile drive axle drive mechanism-helical bevel gear follower, differential casing and bearing.
Background technique
Automobile drive axle is one of core assembly of vehicle, is also the end of chassis power transmission system.Gear in ransaxle mainly comprises two parts: Driven Gear of Final Reduction Gear (helical bevel gear) and differential gear (straight bevel gear).Driven Gear of Final Reduction Gear is used for driving torque power to reduce rotating speed further, and increases its moment of torsion, changes the transmission direction of power, thus obtains enough vehicle traction and suitable rotating speed.When automobile turning or traveling are in the process on uneven road surface, driving wheels is rotated with different angular velocity.It is all doing pure rolling that the transmission of power of differential gear can ensure that both sides drive between wheel and ground, to avoid the phenomenons such as wheel-slip occur.Therefore, the quality of automobile drive axle can have an immense impact on to the reliability of automobile and durability, and in addition, the quality of automobile drive axle also plays vital effect to the power character of automobile, Economy, stationarity and mobility.
Domestic automobile ransaxle is on the basis of loader, forklift axle technology abroad, in conjunction with the structure independent research of driving axle of heavy automobile.But, due to factors such as technical foundation weakness and designed capacity deficiencies, the overall weight volume causing current China automobile drive axle is comparatively large, structural behaviour is more weak, service life is short, and the gear transmission noise in running is high, early failue many problems such as generally.Therefore, for the various problems that current automobile drive axle occurs, being optimized design in conjunction with national conditions to it has become the focus that scientific and technical personnel in the industry pay close attention to and the problem being badly in need of solution.
See Fig. 1, the drive axle structure of first certain the benz commercial car comparatively general for domestic application, introduce the structure composition of automobile drive axle differential housing unit: 1 and 6 is the tapered roller bearing on differential drive shaft, 2 and 7 are respectively a left side half housing of differential mechanism and right half housing, 3 is helical bevel gear follower, 4 is two and half housings of differential mechanism: the connecting bolt of left half housing 2 and right half housing 7, and 8 is right half housing 7 of differential mechanism and the connecting bolt of helical bevel gear follower 3.At present; domestic common differential casing mainly adopts the part blank processing mode of cast form; and; in order to strengthen the mechanical strength of two housings about this accelerator; usually also several stiffening ribs 5 to be set up on the outer surface of this two and half housing; so not only increase the consumption of steel, also virtually add the deadweight of differential casing.
Precise forming process, as a kind of advanced manufacturing technology, is progressively grow up on the basis of traditional contour forging technique.This technique not only overcomes the shortcoming that the utilization rate of raw materials of cutting is low, manufacturing efficiency is low and cause multinomial mechanical propertys such as comprising its flexural strength to reduce because cutting off steel fiber streamline.Therefore, compared with the part adopting conventional casting techniques to produce, utilize advanced precision die forging formation technique significantly to improve the multinomial mechanical property of component of machine, the development trend of efficient, accurate, the green and clean advanced manufacturing technology meeting 21 century is provided more.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of automobile drive axle differential housing cell arrangement of high strength of structure innovation, the utility model utilizes precision die forging plastic forming process that multiple part is integrated formation combining unit device, namely use precision die forging plastic forming technology by the helical bevel gear follower in automobile drive axle, bearing inner race and the multiple part of differential half casing body integrally component, precision forging and cutting technology is adopted to make, significantly to save on steel basis, make this cell arrangement structure simple, compact, rationally, also improve steel consistency, optimize the heterogeneous microstructure of part, preserve complete metal streamline, thus improve the mechanical property of each component in this drive axle differential case body unit device, and alleviate deadweight, improve launch performance and the working life of automobile.
In order to achieve the above object, the utility model provides a kind of automobile drive axle differential housing cell arrangement of high strength, it is characterized in that: described differential casing cell arrangement is provided with: left and right two and half housings of differential mechanism and connecting bolt thereof, lay respectively at two tapered roller bearings of the left and right two and half housing tail ends of this differential mechanism, be arranged on respectively the right half hull outside periphery of this differential mechanism and indent neutral position, for the middle shell of the helical bevel gear follower and this differential mechanism that transmit driving torque power; Wherein, left and right two and half housings of described differential mechanism are connected in one with the inner ring of the tapered roller bearing of its tail end component respectively, and the right side half housing of this differential mechanism also forms integral member with helical bevel gear follower; The outside dimension of described tapered roller bearing outer ring remains unchanged, but it is thick or remain unchanged according to the increasing of the tapered roller diameter of this bearing, then the thickness of tapered roller bearing outer ring correspondingly remains unchanged or increases thickness, to strengthen the mechanical property of this differential casing cell arrangement.
The part blank manufacturing process of left and right two and half housings of described differential mechanism is all be improved to precision die forging plastic forming process by casting to be processed into, both its mechanicalness had been improved, make that the wall thickness of these left and right two and half housings and boundary dimension are all corresponding than half housing part of conventional construction reduces 3 ~ 10%, and the outer surface of right half housing do not have stiffening rib.
When the outside dimension of described tapered roller bearing outer ring remains unchanged, the corresponding increase of diameter of the tapered roller of this bearing, to strengthen the mechanical strength properties of this tapered roller bearing.
The outside dimension of described tapered roller bearing outer ring remains unchanged, and when the diameter of the tapered roller of this bearing also remains unchanged, then the corresponding increase of outer ring thickness of this tapered roller bearing, to strengthen the mechanical strength properties of this tapered roller bearing.
The middle shell of described differential mechanism adopts precision die forging plastic forming process to be processed into.
Profile of tooth straight forming in precision die forging course of working of the helical bevel gear follower of the right half hull outside periphery of described differential mechanism, the corresponding reduction 3-15mm of thickness of this helical bevel gear follower, and the angle 2-20 ° of corresponding its back cone angle of increasing, the strength of gear teeth of this helical bevel gear is increased.
About described differential mechanism, the tail end of two and half housings is rotating shaft outer surfaces of the inner ring position of tapered roller bearing.
The advantage of the automobile drive axle differential housing cell arrangement of the utility model high strength is:
For domestic application comparatively general certain benz commercial car ransaxle be described, the differential casing cell arrangement of the utility model innovation structure design and manufaction is adopted to save material more than 11% than the parts of conventional construction, and because adopt the blank processing technology that precision die forging is shaped, the number of spare parts of this cell arrangement is reduced, structure is simple, compact, rationally, impurity in raw material is also extruded, roll over broken, also improve steel consistency, optimize the heterogeneous microstructure of metal parts, also saving complete metal streamline, the multinomial performances such as the mechanical strength of each component in this drive axle differential case body unit device are all significantly improved, and alleviate deadweight.
In addition, the utility model, by axle journal two being made of one of parts components of bearing inner race and differential casing, like this when assembly space is limited, can improve diameter and the quantity of roller, thus significantly improve the bearing capacity of bearing, improve launch performance and the working life of automobile.
In a word, the utility model has good popularizing application prospect.
Accompanying drawing explanation
Fig. 1 is present domestic conventional automobile drive bridge speed differientiator structure composition schematic diagram.
Fig. 2 is the utility model automobile drive axle differential housing cell arrangement structure composition schematic diagram.
Fig. 3 is that the design of part that helical bevel gear follower, bearing inner race and right differential housing in the utility model differential casing cell arrangement connect as one forms schematic diagram.
Fig. 4 is that the design of part that bearing inner race in the utility model differential casing cell arrangement and differential mechanism left shell connect as one forms schematic diagram.
Fig. 5 is the design of part composition schematic diagram of the differential mechanism middle shell in the utility model differential casing cell arrangement.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail.
The utility model is a kind of automobile drive axle differential housing cell arrangement of High-strength light-weight, and the main purpose that its structural design is improved is the normal service life in order to extend ransaxle, improves the bearing capacity of ransaxle.The key of concrete technological means and structure innovation is the advantage utilizing precision die forging Plastic Forming processing technology, helical bevel gear follower, bearing inner race and differential casing is formed a new part component.
Below in conjunction with Fig. 2 ~ Fig. 5, specifically introduce the structure composition of the utility model automobile drive axle differential housing cell arrangement:
The utility model differential casing cell arrangement is provided with: left half housing 10 of differential mechanism and right half housing 11 and connecting bolt 14, lay respectively at two tapered roller bearing outer rings 13 and 12 of left and right two and half housing 10,11 tail ends of this differential mechanism, and be positioned at right half housing 11 indent neutral position, the middle shell 9 of this differential mechanism.Wherein, left and right two and half housings 10 and 11 of differential mechanism respectively with being connected in one of the bearing inner race component being matched in tapered roller bearing outer ring 13 and 12 of its tail end, the right side half housing 11 of differential mechanism also forms integrated component with helical bevel gear follower.And, this is accompanied with left half housing 10 of differential mechanism of tapered roller bearing internal ring and is accompanied with right half housing 11 of differential mechanism of tapered roller bearing internal ring and helical bevel gear follower, and the middle shell 9 of differential mechanism is all adopt precision die forging plastic forming process to be processed into part blank, then make via heat treatment process and cutting.
The key technology that the utility model apparatus structure improves is: because differential mechanism is left, the part 10 of right two and half housings, the blank manufacturing process of 11 is improved to die forging by casting, improve its mechanical integrated performance, thus make this differential mechanism left, right two and half housings 10, the wall thickness of 11 is corresponding with boundary dimension reduces 3 ~ 10%, and because the right side half housing 7 in original tradition composition structure and helical bevel gear follower 3 (shown in Figure 1) to be synthesized the new right side half housing 11 of integration, therefore this right half housing 11 is no longer provided with stiffening rib, achieve component lightweight.Like this, when the outer ring outside dimension of tapered roller bearing outer ring 13 and 12 remains unchanged, the diameter of the tapered roller of these two bearings can correspondingly increase, and which enhances the mechanical strength of these two tapered roller bearings.Similarly, if the outer ring outside dimension of these two tapered roller bearing outer rings 13 and 12 remains unchanged, and the diameter of the tapered roller of these two bearings is when also remaining unchanged, then the thickness of the outer ring 13 and 12 of these two tapered roller bearings also just can correspondingly increase, thus strengthens the mechanical strength of this two places tapered roller bearing.
In order to improve the joint intensity of the helical bevel gear follower 3 of conventional construction and right half housing 7 of differential mechanism, these two kinds of constitutional details adopt the manufacture of precision die forging to combine by the utility model device, namely utilize spiral angle gear accurate die forging plastic forming process in conjunction with the precision die forging plastic forming process of right half housing, by helical bevel gear follower 3 with originally by fastening piece: two kinds of design of part parts of connecting bolt 4 just right half housing 7 of connected differential mechanism adopt precision forging modes to form a new structural member (shown in Figure 3), so just the parts of tooth of helical bevel gear is forged together by precision die forging Plastic Forming mode and process, form right half housing 11 of differential mechanism of the architecture advances of the utility model device.
In addition, feasibility based on the formation technique of forging helical bevel gear is considered, right for the differential mechanism of the original conventional construction in Fig. 1 half housing 7 is split as two-part by the utility model device: be respectively right half housing 11 (shown in Figure 3) of differential mechanism in the utility model device and differential mechanism middle shell 9 (shown in Figure 5), and right half housing 11 of these two parts and middle shell 9 are all adopt precision die forging plastic forming process to be processed into.
Because the profile of tooth of the helical bevel gear follower 3 of right half housing 11 outer periphery of differential mechanism in the utility model device straight forming together in precision die forging course of working, like this, while the mechanical strength improving right half housing 11 of the utility model differential mechanism, the light-weight design of housing can also be carried out: make this two and half housing: the wall thickness of 10 and 11 is corresponding with boundary dimension reduces 3 ~ 10%.Concrete measure has two: one to be the thickness reducing helical bevel gear follower in Fig. 3, and strengthens the angle of its back cone angle; Two is the reinforcing rib structures removing right half housing 11 of differential mechanism.The machining allowance that fine finishing leaves 0.2-0.5mm respectively for heat treatment and will be cut in the concavo-convex two sides of the profile of tooth of this right half housing 11 part.Right half housing 11 of this differential mechanism is that the reference level in tooth shape locating mode as cutting carries out centering processing; Meanwhile, the corresponding reduction 3-15mm of gear thickness of this helical bevel gear follower, and the angle 2-20 ° of corresponding its back cone angle of increasing, make the strength of gear teeth of this helical bevel gear be increased.
In order to improve the bearing capacity of automobile drive axle, excavate ransaxle potentiality to greatest extent, promoting the matching degree of bearing bearing load ability, is also very important.
As everyone knows, in order to improve the bearing capacity of bearing, improving roller diameter is the most effective way.Because the fit dimension of bearing outer ring is restricted, as strengthened roller diameter, the wall thickness of bearing enclose will be thinning, can produce larger impact like this on the working life of bearing.Another architecture advances of the present utility model is: the outside dimension of the tapered roller bearing outer ring 13 and 12 of the utility model differential casing cell arrangement remains unchanged, but it is thick or remain unchanged according to the increasing of the tapered roller diameter coordinated with these two tapered roller bearing outer rings 13 and 12, then the thickness of these two tapered roller bearing outer rings 13 and 12 needs correspondingly remain unchanged or increase thickness, thus strengthens the mechanical property of the one-piece element of this differential casing cell arrangement.The thinking that the innovation of this structural design improves is applicable to the right side half housing (see Fig. 3) and left half housing (see Fig. 4) of the utility model automobile drive axle differential housing cell arrangement differential mechanism simultaneously.
The tail end of left half housing 10 of differential mechanism in the utility model device and right half housing 11, the heat treatment process being used separately as the rotating shaft outer surface of the bearing inner race position matched with tapered roller bearing outer ring 13 and 12 require: surface hardness 58-64HRC, surface roughness Ra≤0.5 μm.
Claims (7)
1. the automobile drive axle differential housing cell arrangement of a high strength, it is characterized in that: described differential casing cell arrangement is provided with: left and right two and half housings of differential mechanism and connecting bolt thereof, lay respectively at two tapered roller bearings of the left and right two and half housing tail ends of this differential mechanism, be arranged on respectively the right half hull outside periphery of this differential mechanism and indent neutral position, for the middle shell of the helical bevel gear follower and this differential mechanism that transmit driving torque power; Wherein, left and right two and half housings of described differential mechanism connect as one component with the inner ring of the tapered roller bearing of its tail end respectively, and the right side half housing of this differential mechanism also forms integral member with helical bevel gear follower; The outside dimension of described tapered roller bearing outer ring remains unchanged, but it is thick or remain unchanged according to the increasing of the tapered roller diameter of this bearing, then the thickness of tapered roller bearing outer ring correspondingly remains unchanged or increases thickness, to strengthen the mechanical property of this differential casing cell arrangement.
2. automobile drive axle differential housing cell arrangement according to claim 1, is characterized in that: left and right two and half housings of described differential mechanism are all adopt precision die forging plastic forming process to be processed into.
3. automobile drive axle differential housing cell arrangement according to claim 2, is characterized in that; When the outside dimension of described tapered roller bearing outer ring remains unchanged, the corresponding increase of diameter of the tapered roller of this bearing, to strengthen the mechanical strength properties of this tapered roller bearing.
4. automobile drive axle differential housing cell arrangement according to claim 2, is characterized in that; The outside dimension of described tapered roller bearing outer ring remains unchanged, and when the diameter of the tapered roller of this bearing also remains unchanged, then the corresponding increase of outer ring thickness of this tapered roller bearing, to strengthen the mechanical strength properties of this tapered roller bearing.
5. automobile drive axle differential housing cell arrangement according to claim 1, is characterized in that; The middle shell of described differential mechanism adopts precision die forging plastic forming process to be processed into.
6. automobile drive axle differential housing cell arrangement according to claim 1, is characterized in that; Profile of tooth straight forming in precision die forging course of working of the helical bevel gear follower of the right half hull outside periphery of described differential mechanism, the corresponding reduction 3-15mm of thickness of this helical bevel gear follower, and the angle 2-20 ° of corresponding its back cone angle of increasing, the strength of gear teeth of this helical bevel gear is increased.
7. automobile drive axle differential housing cell arrangement according to claim 1, is characterized in that; About described differential mechanism, the tail end of two and half housings is rotating shaft outer surfaces of the inner ring position of tapered roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520756920.6U CN205207583U (en) | 2015-09-28 | 2015-09-28 | Automobile drive axle differential mechanism containing unit device of high strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520756920.6U CN205207583U (en) | 2015-09-28 | 2015-09-28 | Automobile drive axle differential mechanism containing unit device of high strength |
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| CN205207583U true CN205207583U (en) | 2016-05-04 |
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| CN201520756920.6U Active CN205207583U (en) | 2015-09-28 | 2015-09-28 | Automobile drive axle differential mechanism containing unit device of high strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611538A (en) * | 2018-12-21 | 2019-04-12 | 青岛青特众力车桥有限公司 | A kind of differential casing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611538A (en) * | 2018-12-21 | 2019-04-12 | 青岛青特众力车桥有限公司 | A kind of differential casing |
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