CN111089154A - Drive axle differential mechanism's lubricating structure and drive axle differential mechanism assembly - Google Patents
Drive axle differential mechanism's lubricating structure and drive axle differential mechanism assembly Download PDFInfo
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- CN111089154A CN111089154A CN201811245650.7A CN201811245650A CN111089154A CN 111089154 A CN111089154 A CN 111089154A CN 201811245650 A CN201811245650 A CN 201811245650A CN 111089154 A CN111089154 A CN 111089154A
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 title claims abstract description 25
- 239000003921 oil Substances 0.000 claims abstract description 189
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- 238000005461 lubrication Methods 0.000 claims description 15
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 11
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000004087 circulation Effects 0.000 abstract description 6
- 230000004089 microcirculation Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 11
- 241000239290 Araneae Species 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0424—Lubricant guiding means in the wall of or integrated with the casing, e.g. grooves, channels, holes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0427—Guidance of lubricant on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0493—Gearings with spur or bevel gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to a lubricating structure of a drive axle differential and a drive axle differential assembly. The lubricating structure comprises an oil baffle cover, the oil baffle cover is fixedly arranged on the circumferential outer side of a tooth surface side differential shell of the differential, an outer conical surface is arranged at the axial joint of the tooth surface side differential shell and a half axle wheel of the differential, and the rotating diameter of the outer conical surface towards the end of the half axle wheel is increased; a gap is formed between the oil baffle cover and the outer conical surface so that lubricating oil flows in; an oil inlet which leads to the inner cavity is formed in the inner side of the gap of the gear surface side differential shell. The invention can promote the oil to enter and discharge, and realizes the oil circulation between the oil in the inner cavity of the differential case and the oil outside the differential case through the inlet and outlet of the oil, thereby being beneficial to bringing out impurities and heat generated in the differential mechanism, reducing the impurities in the inner cavity of the differential case, reducing the internal temperature of the differential mechanism, simultaneously forming the oil microcirculation in the inner cavity and improving the lubricating effect, thereby obviously reducing the internal abrasion of the differential mechanism and greatly prolonging the service life of the differential mechanism and the whole axle.
Description
Technical Field
The invention relates to the technical field of automobile drive axle differential assemblies, in particular to a lubricating structure of a drive axle differential and a drive axle differential assembly.
Background
In the existing heavy-duty automobile drive axle system, the types with higher failure rate of the inter-wheel differential assembly comprise abnormal wear of a differential shell, abnormal wear of a cross shaft, breakage of the cross shaft, burning of a planet wheel and the cross shaft and the like. The reason for the faults is mainly the unsmooth lubrication in the wheel differential. Unsmooth lubrication makes lubricating oil can not get into the mutual contact surface of each part fully to the problem that the abnormal wear of part and poor shell are inside to generate heat appears, and unsmooth lubrication also makes inside heat can not effectively discharge from poor shell inside simultaneously. These problems greatly reduce the useful life of the differential assembly and drive axle.
Therefore, there is a need to provide a reasonable and effective technique for lubricating a differential of a drive axle to improve the lubricating effect in the differential, prevent abnormal wear of parts and heat generation in the differential housing, and prolong the service life of the differential assembly and the drive axle.
Disclosure of Invention
The invention aims to provide a lubricating structure of a drive axle differential and a drive axle differential assembly, so as to reasonably and effectively lubricate the drive axle differential, prevent abnormal abrasion of parts and the problem of heating inside a differential shell, and prolong the service life of the differential assembly and the drive axle.
The lubricating structure of the drive axle differential mechanism comprises an oil baffle cover, wherein the oil baffle cover is fixedly arranged on the circumferential outer side of a tooth surface side differential mechanism shell of the differential mechanism, an outer conical surface is arranged at the axial joint of the tooth surface side differential mechanism shell and a half axle wheel of the differential mechanism, and the rotating diameter of the outer conical surface towards the end of the half axle wheel is increased; a gap is formed between the oil blocking cover and the outer conical surface so that lubricating oil can flow in; and an oil inlet which leads to the inner cavity is formed in the inner side of the gap of the differential shell on the tooth surface side.
In the lubricating structure of the drive axle differential, the gear back side differential shell of the differential is provided with an oil drain port communicating the inner cavity with the outer side, the channel trend of the oil drain port and the axle line of the half axle of the differential are inclined, and the inclination is enlarged towards the outer side.
The inclination of the lubricating structure of the differential of the drive axle is in the range of 0-90 degrees.
In the lubricating structure of the drive axle differential, the oil discharge ports are in one group, and the oil discharge ports are circumferentially arranged at intervals.
In the lubricating structure of the drive axle differential, the gear-side differential shell is provided with the inner oil groove at the position of the planet wheel, the planet wheel cross axle of the differential is provided with the cross axle oil groove, and the inner oil groove is communicated with the cross axle oil groove.
In the lubricating structure of the drive axle differential, the inner oil groove is axially arranged along the inner spherical surface of the gear-side differential shell, and the cross-axle oil groove is axially arranged on the vertical axle of the planet wheel cross axle.
In the lubricating structure of the differential mechanism of the drive axle, the inner oil grooves are single or one group, and when the inner oil grooves are one group, the inner oil grooves of the group are arranged at intervals along the circumferential direction; the cross oil grooves are single or in one group, and when the cross oil grooves are in one group, the cross oil grooves are arranged at intervals along the circumferential direction.
In the lubricating structure of the drive axle differential, the oil baffle cover is a rotary thin-walled member, the oil baffle cover forms the gap with the gear-face-side differential housing at the smaller inner ring, and the oil baffle cover is fixedly assembled with the gear-face-side differential housing at the larger inner ring; the taper of the outer conical surface of the tooth flank side differential case is between 0 and 60 degrees.
The invention also provides a drive axle differential assembly, which comprises a tooth surface side differential shell, a left half axle wheel, a right half axle wheel, a tooth back side differential shell, a planet wheel, a cross axle and the lubricating structure, wherein the left half axle wheel and the right half axle wheel are respectively arranged on the left half axle and the right half axle of the cross axle; the planet wheels are arranged on the upper half shaft and the lower half shaft of the cross shaft; the gear side differential shell covers the left half-axle wheel and the planet wheel or covers the right half-axle wheel and the planet wheel; the tooth back side differential shell is covered outside the right half shaft wheel and the planet wheel or the left half shaft wheel and the planet wheel; and an oil baffle cover of the lubricating structure is arranged on the periphery of the differential shell on the tooth surface side.
In the drive axle differential assembly, the drive axle differential assembly further comprises a half axle gear gasket and a planet wheel gasket, and the half axle gear gasket is arranged between the left half axle wheel and/or the right half axle wheel and the tooth surface side differential case and/or the tooth back side differential case; the planet wheel spacer is arranged between the planet wheel and the tooth flank side differential housing and/or the tooth flank side differential housing.
According to the invention, the oil inlet is formed between the tooth surface side differential shell and the assembling oil baffle cover, so that oil can enter in a centrifugal mode due to the structures of the conical surface and the oil baffle cover, and therefore, the oil is promoted to quickly and effectively enter the inner cavity of the differential shell; the oil discharge port is formed on the differential housing on the back side of the tooth, and oil can be discharged by centrifugal force due to inclination, so that the oil discharge is promoted. From this through the entering and the discharge of fluid for realized poor shell inner chamber fluid and poor shell outside fluid "fluid circulation", help taking out the impurity and the heat that produce differential mechanism inside, reduce poor shell inner chamber impurity, reduce differential mechanism inside temperature. Meanwhile, the cross shaft oil groove is formed in the cross shaft, the inner oil groove is formed in the tooth surface side difference shell, the cross shaft oil groove and the inner oil groove are communicated to form oil liquid microcirculation, lubricating oil can enter the surface of a part to be lubricated more fully, and the lubricating effect is further improved. Therefore, the invention can obviously reduce the abrasion in the differential and greatly improve the service life of the differential and the whole axle.
Drawings
FIG. 1 is a schematic cross-sectional (cross axle and planet wheel not shown) structural view of an inter-wheel differential system of a drive axle according to an embodiment of the present invention;
FIG. 2 is a cross-sectional structural schematic view of an inter-axle differential system of an embodiment of the present invention (including cross-sectional views of a spider and planets);
FIG. 3 is a structural schematic view of a flank side differential case of an embodiment of the present invention;
FIG. 4 is a structural schematic of a flank side differential case of an embodiment of the present invention;
FIG. 5 is a cross-shaft configuration of an embodiment of the present invention;
FIG. 6 is a schematic structural view of an oil deflector cover according to an embodiment of the present invention;
FIG. 7 is a schematic illustration of a differential case on the back side of the teeth according to an embodiment of the present invention.
The reference numbers illustrate:
1 a flank differential housing; 2, an oil shield; 3 left half axle gear shim; 4, a left half-axle wheel; 5 right half-axle wheel; 6 right half shaft gear gasket; a 7-tooth back side differential housing; 8 planet wheels; 9, a cross shaft; 10 planet wheel pad; 11 an outer conical surface; 12 oil inlet of oil shield; 13 tooth surface side differential case oil inlets; 14 an internal oil groove; 15 a cross-axle oil groove; 16-tooth back side differential case drain.
Detailed Description
To facilitate understanding and implementing the invention by those of ordinary skill in the art, embodiments of the invention are now described with reference to the drawings.
The invention aims to solve the problem of the failure of a drive differential caused by lubrication failure in the prior art, and provides a technology capable of better solving the problem of internal lubrication of the differential, so as to promote the entry and/or discharge of oil, reduce abnormal wear between a differential shell and a half axle wheel on the tooth flank side and the tooth back side and the wear between a cross shaft and a planet wheel, and further achieve the purpose of prolonging the service life of a drive axle differential.
Firstly, in order to promote oil to quickly and effectively enter an inner cavity, the oil baffle cover is assembled on the tooth surface side difference shell to form centrifugal oil inlet, so that the inflow amount and the inflow speed of the oil are improved, and a foundation guarantee is provided for sufficient lubrication.
The invention can obviously reduce the internal abrasion of the differential, and greatly improve the service life of the differential and the whole axle.
As shown in fig. 1, the lubricating structure of the differential gear of the drive axle of the present invention comprises an oil baffle 2, the oil baffle 2 is fixedly arranged at the circumferential outer side of the differential gear case 1 at the tooth flank side of the differential gear, the differential gear case 1 at the tooth flank side is provided with an outer conical surface 11 at the axial joint part with the axle of the differential gear, the revolving diameter of the outer conical surface 11 towards the end of the axle is increased; a gap is formed between the oil baffle cover 2 and the outer conical surface 11 to form an oil inlet 12 of the oil baffle cover so that lubricating oil flows in. Because clearance formula oil inlet is formed around the conical surface, consequently more to the inboard because the centrifugal force is also big that the diameter grow, so effectively guaranteed the efficiency of oil feed. The taper of the outer tapered surface 11 of the flank-side differential case 1 may be between 0 and 60 degrees.
Accordingly, in order to let oil enter the internal cavity, the flank side differential case 1 is provided with an oil inlet opening to the internal cavity, i.e., a flank side differential case oil inlet opening 13, at the inside of the gap. The structure and arrangement of the oil inlets 13 can be seen in fig. 3, the number of the oil inlets is not limited, and the oil inlets can be single or a group, and a group of the oil inlets can be circumferentially spaced, preferably uniformly arranged.
Further, in order to promote smooth and effective oil drainage, an oil drainage port, namely, an oil drainage port 16 of the tooth back side differential case is arranged on the tooth back side differential case 7 of the differential to communicate the inner cavity and the outer side, as shown in fig. 1 and 7, the channel direction of the oil drainage port and the axes of the half axle wheels of the differential, such as the left half axle wheel 4 and the right half axle wheel 5 shown in fig. 1, form a slope, and the slope is enlarged and inclined towards the outer side. Therefore, the centrifugal force of the oil liquid is increased toward the outside, and the oil liquid is easily discharged, so that the discharge of the oil liquid is effectively promoted.
The slope of the oil drain port may range from 0 to 90 degrees, although values at the endpoints are not included.
Typically, the oil discharge ports may be provided as a group which may be circumferentially spaced, preferably uniformly spaced. The number and caliber size of the oil discharge ports and the cross-sectional shape of the oil discharge ports can be set according to specific lubrication requirements, and the invention is not limited. Of course, only a single oil drain port may be provided.
Through effectual oil feed and/or oil extraction, "fluid circulation" of the inside fluid of poor shell with outside fluid has been realized, can effectively bring out heat and impurity, reduces inner chamber impurity, reduces inside temperature.
In order to make the lubricating oil fully contact with the parts of the inner cavity, especially for effective lubrication in places where friction pairs are present, the flank-side differential case 1 is provided with an inner oil groove 14 at the planet wheel 8, and a spider oil groove 15 is provided on the planet wheel spider 9 of the differential, the inner oil groove 14 being in communication with the spider oil groove 15. Oil grooves are formed in the cross shaft and the shell on the tooth surface side, and the oil grooves are communicated to form oil microcirculation, so that lubricating oil fully enters the surface to be lubricated of the part, and the lubricating effect is improved.
Specifically, as shown in fig. 2 and 4, the internal oil groove 14 may be provided axially along the inner spherical surface of the differential case 1 on the tooth flank side, and as shown in fig. 2 and 5, the spider oil groove 15 may be provided axially on the vertical axis of the planetary spider 9.
The internal oil sumps 14 may be single or in groups, and when in a group, the groups of internal oil sumps 14 are circumferentially spaced apart. The cross oil grooves are single or in one group, and when the cross oil grooves are in one group, the cross oil grooves are arranged at intervals along the circumferential direction. Preferably, the oil grooves are uniformly spaced.
As shown in fig. 6, the oil deflector 2 may be a thin-walled rotary member, the oil deflector 2 forms the gap with the gear-side differential case at the smaller inner ring, and the oil deflector 2 is fixedly assembled with the gear-side differential case at the larger inner ring, as shown in fig. 1. The fixing method is not limited, and may be bolt fixing or welding connection, so that the oil deflector and the flank side differential case are formed as a single piece.
The invention also provides a drive axle differential assembly, as shown in fig. 1, the drive axle differential assembly comprises a gear-surface-side differential case 1, a left half axle wheel 4, a right half axle wheel 5, a gear-back-side differential case 7, a planet wheel 8, a cross axle 9 and the lubricating structure.
Wherein, the left half-axle wheel 4 and the right half-axle wheel 5 are respectively arranged on the left half-axle and the right half-axle of the cross axle 9; the planet wheels 8 are mounted on the upper and lower half shafts of the cross shaft 9. The gear-side differential case 1 covers the left half-axle wheel 1 and the planet wheel 8 or covers the right half-axle wheel 5 and the planet wheel 8. This is set so as not to particularly specify the left-right direction of the present invention, that is, the tooth-side differential case 1 may be mounted on the left side or the right side, and the same applies to the tooth-back-side differential case 7. The tooth back side differential case 7 covers the right half axle wheel 5 and the planetary wheel 8 or the left half axle wheel 4 and the planetary wheel 8. The oil deflector 2 of the lubricating structure is provided on the periphery of the differential case 1 on the tooth surface side.
More specifically, as shown in FIG. 1, the transaxle differential assembly may further include side gear spacers, such as left and right side gear spacers 3 and 6, and a planet wheel spacer 10, as shown in FIG. 2. Side gear spacers are provided between the left side gear 4 and/or the right side gear 5 and the tooth flank side differential case 1 and/or the tooth flank side differential case 7. As shown in fig. 2, a planet wheel spacer 10 is provided between the planet wheel 8 and the flank-side differential case 1 and/or the flank-side differential case 7. The increase gasket can reduce the wearing and tearing between casing and planet wheel and half axle wheel and the casing.
According to the invention, the oil inlet is formed between the tooth surface side differential shell and the assembling oil baffle cover, so that oil can enter in a centrifugal mode due to the structures of the conical surface and the oil baffle cover, and therefore, the oil is promoted to quickly and effectively enter the inner cavity of the differential shell; the oil discharge port is formed on the differential housing on the back side of the tooth, and oil can be discharged by centrifugal force due to inclination, so that the oil discharge is promoted. From this through the entering and the discharge of fluid for realized poor shell inner chamber fluid and poor shell outside fluid "fluid circulation", help taking out the impurity and the heat that produce differential mechanism inside, reduce poor shell inner chamber impurity, reduce differential mechanism inside temperature. Meanwhile, the cross shaft oil groove is formed in the cross shaft, the inner oil groove is formed in the tooth surface side difference shell, the cross shaft oil groove and the inner oil groove are communicated to form oil liquid microcirculation, lubricating oil can enter the surface of a part to be lubricated more fully, and the lubricating effect is further improved.
In a word, the invention can effectively lubricate, obviously reduce the internal abrasion of the differential mechanism and greatly improve the service life of the differential mechanism and the whole axle.
Examples
As shown in fig. 1 and 2, the drive axle differential adopting the novel lubrication method in the present embodiment includes a tooth-side differential case 1, an oil baffle cover 2, a left side gear pad 3, a left side gear 4, a right side gear 5, a right side gear pad 6, a tooth-back differential case 7, a planet wheel 8, a cross axle 9, and a planet wheel pad 10. The characteristics and functions are as follows:
the tooth-side differential case 1 has a conical surface of revolution with a draft angle at the outer conical surface 11. The oil attached to the conical surface enters the differential cavity through the oil inlet 12 of the oil baffle cover and the oil inlet 13 of the differential shell on the tooth surface side under the action of centrifugal force. The oil baffle cover 2 assembled on the gear side differential case 1 has a certain clearance with the conical surface of the differential case to form an oil inlet 12 of the oil baffle cover, and the oil baffle cover 2 has the function of sucking external oil into the inner cavity of the differential case when rotating along with the gear side differential case. When the inner cavity of the differential shell is filled with oil, the oil blocking cover 2 also has the oil blocking function, so that a certain amount of oil can be kept inside the differential shell. The differential case 1 on the tooth surface side and the oil baffle cover 2 act together to introduce external oil into an inner cavity of the differential case.
After entering the differential case, the external oil passes through the differential case internal parts and reaches the oil drain port 16 of the differential case 7 on the tooth back side. The oil drain hole 16 is angled upward relative to the horizontal. During rotation of the backsides of the teeth differential case 7, oil adhering to the drain port 16 and the surrounding area is "thrown" out of the differential cavity by centrifugal force. The backseat differential case 7 discharges the differential case cavity oil.
Thus, when the differential operates, the gear side differential case 1 and the oil shield 2 can suck oil, and the gear back side differential case 7 discharges the oil. The oil in the inner cavity of the differential shell is always in a circulating state. The oil circulation is helpful to take out impurities and heat generated in the differential, and reduces the abrasion and temperature of parts in the cavity.
Meanwhile, an inner oil groove 14 is formed in the contact area of the differential case 1 on the tooth surface side and the planet wheel gasket 10, a cross shaft oil groove 15 is formed in the contact area of the cross shaft 9 and the planet wheel 8, and the inner oil groove 14 and the cross shaft oil groove 15 are in a communicated state, so that when the differential works, oil in the inner oil groove 14 and the cross shaft oil groove 15 and oil in an inner cavity of the differential case are in microcirculation. This structure helps to introduce lubricating oil into the contact areas of the planet wheel pad and the tooth-side differential case, and the spider and the planet wheels, thereby reducing wear of the planet wheel pad, the tooth-side differential case, the spider and the planet wheels.
The invention has the following advantages:
according to the invention, the oil inlet 13 and the oil baffle cover 2 are arranged on the differential case 1 on the tooth surface side, so that oil can be promoted to enter the inner cavity of the differential case; an oil drain 16 is provided on the differential housing 7 on the tooth back side to facilitate oil drainage. The oil circulation between the oil in the inner cavity of the differential case and the oil outside the differential case is realized through the entry and the discharge of the oil, the impurities and the heat generated inside the differential mechanism are favorably brought out, the impurities in the inner cavity of the differential case are reduced, and the internal temperature of the differential mechanism is reduced. Meanwhile, a cross oil groove 15 is formed in the cross 9, and an internal oil groove 14 is formed in the differential case 1 on the tooth surface side. The inner oil groove 14 and the cross shaft oil groove 15 are communicated to form oil microcirculation, so that lubricating oil can more fully enter the surface of a part to be lubricated, and the lubricating effect is good. Therefore, the invention can obviously reduce the internal abrasion of the differential and greatly improve the service life of the differential and the whole axle.
Although the present invention has been described with reference to the embodiments, those skilled in the art will appreciate that many variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A lubricating structure of a differential mechanism of a drive axle is characterized by comprising an oil baffle cover, wherein the oil baffle cover is fixedly arranged on the circumferential outer side of a gear surface side differential mechanism shell of the differential mechanism; a gap is formed between the oil blocking cover and the outer conical surface so that lubricating oil can flow in; and an oil inlet which leads to the inner cavity is formed in the inner side of the gap of the differential shell on the tooth surface side.
2. The lubrication structure for a drive axle differential according to claim 1, wherein an oil drain port communicating the inner cavity with the outside is provided in the differential case on the tooth back side of the differential, and the passage of the oil drain port is inclined at an inclination which is enlarged toward the outside with respect to the axle line of the differential.
3. The lubricating structure for a drive axle differential according to claim 2, wherein the inclination is in the range of 0 to 90 degrees.
4. The lubrication structure for a drive axle differential according to claim 2 or 3, wherein the oil discharge ports are in a group, and the group of oil discharge ports are circumferentially spaced.
5. The lubrication structure for a drive axle differential according to claim 1, 2 or 3, wherein the gear-side differential case is provided with an internal oil groove at the planet wheel, and a cross-axle oil groove is provided at the planet wheel cross axle of the differential, the internal oil groove communicating with the cross-axle oil groove.
6. The lubrication structure for a drive axle differential according to claim 5, wherein the internal oil groove is provided axially along the inner spherical surface of the tooth-side differential case, and the cross-axis oil groove is provided axially on the vertical axis of the planetary cross-axis.
7. The lubrication structure for a drive axle differential according to claim 6, wherein said internal oil grooves are single or in a group, and when in a group, the internal oil grooves of the group are circumferentially spaced; the cross oil grooves are single or in one group, and when the cross oil grooves are in one group, the cross oil grooves are arranged at intervals along the circumferential direction.
8. The lubrication structure for a drive axle differential according to claim 1, wherein said oil deflector is a rotary thin-walled member which forms said gap with said tooth-side differential case at a smaller inner ring, and which is fixedly fitted with said tooth-side differential case at a larger inner ring; the taper of the outer conical surface of the tooth flank side differential case is between 0 and 60 degrees.
9. A transaxle differential assembly including a differential case on a tooth flank side, a left half wheel, a right half wheel, a differential case on a tooth flank side, a planet wheel, and a cross shaft, and the lubricating structure of any one of claims 1 to 7,
the left half-axle wheel and the right half-axle wheel are respectively arranged on a left half axle and a right half axle of the cross axle;
the planet wheels are arranged on the upper half shaft and the lower half shaft of the cross shaft;
the gear side differential shell covers the left half-axle wheel and the planet wheel or covers the right half-axle wheel and the planet wheel;
the tooth back side differential shell is covered outside the right half shaft wheel and the planet wheel or the left half shaft wheel and the planet wheel;
and an oil baffle cover of the lubricating structure is arranged on the periphery of the differential shell on the tooth surface side.
10. The transaxle differential assembly of claim 9 further comprising side gear spacers and planet wheel spacers, the side gear spacers being disposed between the left and/or right axle wheels and the gear case and/or the gear case; the planet wheel spacer is arranged between the planet wheel and the tooth flank side differential housing and/or the tooth flank side differential housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245650.7A CN111089154A (en) | 2018-10-24 | 2018-10-24 | Drive axle differential mechanism's lubricating structure and drive axle differential mechanism assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811245650.7A CN111089154A (en) | 2018-10-24 | 2018-10-24 | Drive axle differential mechanism's lubricating structure and drive axle differential mechanism assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111089154A true CN111089154A (en) | 2020-05-01 |
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|---|---|---|---|
| CN201811245650.7A Pending CN111089154A (en) | 2018-10-24 | 2018-10-24 | Drive axle differential mechanism's lubricating structure and drive axle differential mechanism assembly |
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| CN (1) | CN111089154A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431907A (en) * | 2020-12-15 | 2021-03-02 | 重庆中奥离合器制造有限公司 | Protective shell applied to differential mechanism and mounting method thereof |
| CN113483086A (en) * | 2021-06-29 | 2021-10-08 | 东风汽车有限公司东风日产乘用车公司 | Differential lubrication system |
| US20220275856A1 (en) * | 2020-03-30 | 2022-09-01 | Aisin Corporation | Differential transmission apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220275856A1 (en) * | 2020-03-30 | 2022-09-01 | Aisin Corporation | Differential transmission apparatus |
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| CN113483086A (en) * | 2021-06-29 | 2021-10-08 | 东风汽车有限公司东风日产乘用车公司 | Differential lubrication system |
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