CN219888692U - Oil cooling lubricating structure of electric drive car differential mechanism - Google Patents
Oil cooling lubricating structure of electric drive car differential mechanism Download PDFInfo
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- CN219888692U CN219888692U CN202320390536.3U CN202320390536U CN219888692U CN 219888692 U CN219888692 U CN 219888692U CN 202320390536 U CN202320390536 U CN 202320390536U CN 219888692 U CN219888692 U CN 219888692U
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- gear
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- differential mechanism
- planet
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- 230000007246 mechanism Effects 0.000 title claims abstract description 46
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 title abstract description 8
- 238000005461 lubrication Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 67
- 239000010687 lubricating oil Substances 0.000 claims description 31
- 230000009467 reduction Effects 0.000 claims description 23
- 239000012208 gear oil Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The utility model provides an oil cooling lubricating structure of electric drive car differential mechanism, includes the differential mechanism casing, the drill way end of the big end of differential mechanism casing, little end semi-axis pilot hole all sets up the terminal surface oil groove, and the inner wall of the semi-axis pilot hole of big end, little end all sets up spiral oil groove and terminal surface oil groove intercommunication, the planetary gear assembly face of planetary shaft pilot hole on the differential mechanism casing is equipped with a plurality of planetary gear lubrication grooves, planetary gear lubrication groove extends to the ring oil groove around the semi-axis gear installation platform along the drill way of differential mechanism casing inner wall from the drill way of planetary shaft pilot hole, the platform terminal surface that sinks of big end, little end semi-axis pilot hole sets up a plurality of semi-axis gear lubrication grooves and ring oil groove intercommunication, corresponds the planetary gear assembly face on the planetary gear shaft, and the semi-axis gear is assembled to the platform assembly, the semi-axis gear meshes with the planetary gear, and a main reducing gear passes through the bolt installation to be fixed at the big end of differential mechanism casing.
Description
Technical Field
The utility model relates to an electric drive vehicle differential mechanism, in particular to an oil cooling lubricating structure of the electric drive vehicle differential mechanism.
Background
The differential mechanism has the effects that the left and right or upper and lower driving wheels can rotate at different rotation speeds, so that the normal running of the automobile under the differential working condition is ensured, the contact surfaces of the internal parts are more, and a large amount of heat is generated due to friction when the parts move, so that the differential mechanism is lubricated by lubricating oil, friction is reduced, and the differential mechanism is used for reducing the temperature to ensure the service life of the differential mechanism. The existing fuel vehicle has the problems that the engine, the transmission, the differential and other devices need lubricating oil for lubrication, a large amount of lubricating oil is prepared for ensuring that all devices can be sufficiently lubricated, but the existing electric driving vehicle has fewer devices for lubrication because of different structures with the fuel vehicle, and the prepared lubricating oil quantity is smaller. The main reduction gear of the existing differential mechanism is sleeved from the small end of the differential mechanism shell, is assembled on the differential mechanism shell and is fixed by bolts, the assembly position of the main reduction gear often shields a part of windows of the differential mechanism shell, and lubricating oil can be seriously influenced to enter the differential mechanism under the condition of small lubricating oil quantity, so that the lubricating effect of the differential mechanism is reduced. Referring to fig. 7, one differential structure currently in use on the market includes: the differential mechanism comprises a differential mechanism shell 1, a tapered roller bearing 2, a flange face bolt 3, a main reduction gear 4, a planetary gear shaft 5, a planetary gear 6, a planetary gear pad 7, a half-shaft gear 8, a half-shaft gear adjusting gasket 9 and a cylindrical pin 10. The main reduction gear is sleeved from the small end of the differential shell, positioned through a spigot after being pressed and assembled, and then connected with the differential shell through a flange surface bolt. Tapered roller bearings are pressed at two ends of a differential housing shaft through interference fit, proper planet gears, planet gear gaskets, a half-shaft gear adjusting gasket and a half-shaft gear are selected to be installed in the differential housing, a planet gear shaft is installed through a planet gear shaft hole of the differential housing, and then cylindrical pins are installed into cylindrical pin holes on the differential housing to fix the planet gear shaft in the differential housing. Because the main reduction gear is sleeved from the small end of the differential mechanism, the stroke in the assembly process is long, and the large system deformation is easy to cause, and the strength is reduced due to the overlarge deformation, so that the risk of tooth breakage exists.
Disclosure of Invention
The utility model aims at overcoming the defects in the prior art, and provides an oil-cooled lubrication structure of an electric drive vehicle differential mechanism, which can improve the lubrication effect of the differential mechanism, fully lubricate the electric drive vehicle differential mechanism with higher precision and ensure the assembly strength of a main reduction gear.
The utility model aims to achieve the oil cooling lubricating structure of the differential mechanism of the electric driven vehicle, the oil cooling lubricating structure comprises a differential mechanism shell, wherein end face oil grooves are formed in orifice ends of a large end half shaft assembly hole and a small end half shaft assembly hole of the differential mechanism shell, spiral oil grooves are formed in inner walls of the large end half shaft assembly hole and the small end half shaft assembly hole and are communicated with the end face oil grooves, a plurality of planetary gear lubricating oil grooves are formed in a planetary gear assembly face of a planetary shaft assembly hole on the differential mechanism shell, the planetary gear lubricating grooves extend from orifice ends of the planetary shaft assembly hole to an annular oil groove around a half shaft gear installation sinking table along the inner wall of the differential mechanism shell, a plurality of half shaft gear lubricating oil grooves are formed in end faces of the sinking table of the large end half shaft assembly hole and the small end half shaft assembly hole and are communicated with the annular oil grooves, two ends of a planetary gear shaft are respectively matched with the planetary shaft assembly hole, a planetary gear is installed on a planetary gear shaft and corresponds to the planetary gear assembly face, the half shaft gear is installed on the planetary gear assembly face, the half shaft gear is meshed with the planetary gear, and a main reduction gear is fixedly installed on the large end of the differential mechanism shell through bolts. The spiral oil groove of big end semi-axis pilot hole is left-hand oil groove, and the spiral oil groove of little end semi-axis pilot hole is right-hand oil groove, the section of semi-axis gear lubrication groove is the V-arrangement, and a plurality of semi-axis gear lubrication grooves are rotational symmetry and distribute. The cut-off section of the planetary gear lubricating oil grooves is U-shaped, and a plurality of planetary gear lubricating oil grooves are distributed in a cross shape. The oil storage device is characterized in that an axle gear adjusting gasket is arranged between the axle gear and the axle gear installation sinking table, and a plurality of oil storage holes are uniformly distributed in the circle center of the upper ring of the axle gear adjusting gasket. And a planetary gear liner is arranged between the planetary gears and the planetary gear assembly surface, and a flanging is arranged in a circle center hole of the planetary gear liner. The large end of the differential housing is provided with a flange, the left end of the flange is provided with an annular step groove for assembling a main reduction gear, a circle center hole of the main reduction gear is sleeved on the annular step groove at the left end of the flange at the large end of the differential housing, and the main reduction gear is fixed with the flange through bolts.
By adopting the scheme, the oil cooling lubrication structure of the electric drive vehicle differential comprises a differential shell, and the orifice ends of the large end half shaft assembly holes and the small end half shaft assembly holes of the differential shell are respectively provided with an end face oil groove, so that lubricating oil can flow into the differential from the electric drive box body, and internal parts of the differential are lubricated. The inner wall of the semi-axis pilot hole of big end, tip all sets up spiral oil groove and terminal surface oil groove intercommunication, and the spiral oil groove of big end semi-axis pilot hole is left-hand oil groove, and the spiral oil groove of tip semi-axis pilot hole is right-hand oil groove, and the aim at that sets up like this, when the differential mechanism during operation, the rotation direction of both ends semi-axis gear is unanimous with the spiral direction of both ends spiral oil groove respectively, more is favorable to lubricating oil to flow into annular oil groove from the spiral oil groove at both ends to fully lubricate semi-axis gear adjustment gasket and semi-axis gear. The planet gear assembly surface of the planet axle assembly hole on the differential housing is provided with a plurality of planet gear lubrication grooves, and the planet gear lubrication grooves extend from the orifice of the planet axle assembly hole to the annular oil grooves around the axle shaft gear installation sinking table along the inner wall of the differential housing, so that lubricating oil can flow into the planet gear lubrication grooves from the annular oil grooves, and the planet gear gaskets and the planet gears can be fully lubricated. The end face of the sinking table of the large-end and small-end half-shaft assembly holes is provided with a plurality of half-shaft gear lubrication grooves communicated with the annular oil grooves, so that lubrication oil can flow into the half-shaft gear lubrication grooves from the annular oil grooves, and the half-shaft gear adjustment gaskets and the half-shaft gears can be fully lubricated. The two ends of the planetary gear shaft are respectively matched with the planetary shaft assembly holes, the planetary gears are arranged on the planetary gear shaft corresponding to the planetary gear assembly surfaces, the half shaft gears are arranged on the sinking table to assemble the half shaft gears, and the half shaft gears are meshed with the planetary gears. A main reducing gear is fixed at the big end of the differential mechanism shell through bolt installation for the main reducing gear can not shelter from the window on the differential mechanism shell, and when main reducing gear and external gear meshing transmission, more lubricating oil in being favorable to the box is splashed into the differential mechanism inside through the window on the differential mechanism shell, fully lubricates the internals.
The utility model has the following beneficial effects;
1. compared with the differential lubricating structure in the prior art, the differential lubricating structure can effectively ensure that parts in the differential are fully lubricated under the condition of less oil quantity, and avoid ablation and gluing of a differential assembly in the differential process of a vehicle.
2. The utility model avoids the excessive system deformation and the strength reduction of the main reduction gear caused by long assembly stroke, and reduces the risk of broken teeth.
3. The utility model avoids the oil stirring loss caused by too much oil quantity and improves the transmission efficiency.
4. The utility model reduces the technical risk of failure of the internal components of the differential due to frictional heating.
The utility model is described in further detail below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a schematic cross-sectional view of a differential of the present utility model;
FIG. 2 is a differential housing according to the present utility model;
FIG. 3 is a side view of a differential housing according to the present utility model;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
FIG. 5 is a side gear adjustment shim according to the present utility model;
FIG. 6 is a planetary gear pad according to the present utility model;
fig. 7 is a schematic diagram of a prior art differential lubrication configuration.
Detailed Description
Referring to fig. 1 to 4, an oil cooling lubrication structure of an electric drive vehicle differential mechanism comprises a differential case 1, wherein end face oil grooves 13 are formed in orifice ends of a large end and a small end of a differential case 1, spiral oil grooves are formed in inner walls of the large end and the small end of the differential case 18 and are communicated with the end face oil grooves 13, the spiral oil grooves of the large end of the differential case 18 are left-handed oil grooves 14, and the spiral oil grooves of the small end of the differential case 18 are right-handed oil grooves 17. The planet gear assembly surface of the planet shaft assembly hole 16 on the differential housing 1 is provided with a plurality of planet gear oil grooves 15, the cut-off surface of the planet gear oil grooves 15 is U-shaped, the plurality of planet gear oil grooves 15 are distributed in a cross shape, and the number of the planet gear oil grooves 15 in the embodiment is four and are arranged on the planet gear assembly surface of the differential housing 1. The planet gear oil grooves 15 extend from the orifices of the planet shaft assembly holes 16 to the annular oil grooves 11 around the axle gear installation sinking platform along the inner wall of the differential housing 1, a plurality of axle gear oil grooves 12 are arranged on the sinking platform end faces of the large and small end axle shaft assembly holes 18 and are communicated with the annular oil grooves 11, the cut-off sections of the axle gear oil grooves 12 are V-shaped, and the axle gear oil grooves 12 are distributed in a rotationally symmetrical mode. The four side gear lubrication grooves 12 of this embodiment are all provided on the end face of the side gear mounting table. The two ends of the planetary gear shaft 5 are respectively matched with the planetary shaft assembly holes 16, the planetary gears 6 are arranged on the planetary gear shaft 5 and correspond to planetary gear assembly surfaces, a planetary gear liner 7 is arranged between the planetary gears 6 and the planetary gear assembly surfaces, and a flanging is arranged at the center hole of the planetary gear liner 7. The side gear installation is sunk to platform assembly side gear 8, set up side gear adjustment gasket 9 between side gear 8 and the side gear installation is sunk to the platform, the last ring centre of a circle equipartition of side gear adjustment gasket 9 sets up a plurality of oil storage holes 21, and the oil storage hole 21 on the side gear adjustment gasket 9 of this embodiment is eight. The side gears 8 mesh with the planetary gears 6. The large end of the differential housing 1 is provided with a flange 19, the left end of the flange 19 is provided with an annular step groove 20 for assembling the main reduction gear 4, a circle center hole of the main reduction gear 4 is sleeved on the annular step groove 20 at the left end of the flange 19 at the large end of the differential housing 1, and the main reduction gear 4 and the flange 19 are fixed through bolts.
The lubrication route of the oil-cooled lubrication structure of the electric drive vehicle differential of the embodiment of the utility model is as follows. The lubricating oil in the electric drive box body firstly enters the spiral oil grooves on the inner walls of the two half shaft assembly holes 18 in the differential case 1 through the end face oil grooves 13 on the two ends of the differential case 1, then flows into the half shaft gear lubricating oil grooves 12 of the half shaft gear installation sinking table surface to lubricate the half shaft gear 8 and the half shaft gear adjusting gasket 9, after oil is stored in the eight oil storage holes on the half shaft gear adjusting gasket 9, the half shaft gear 8 can be fully lubricated, meanwhile, the half shaft gear lubricating oil grooves 12 of the lubricating oil sinking table surface flow into the annular oil grooves 11 around the sinking table, the lubricating oil in the annular oil grooves 11 fully lubricates through the planetary gear lubricating grooves 15 on the planetary gear assembly surface, the planetary gear shafts 5 and the planetary gear gaskets 7, and the lubricating oil can also lubricate the planetary gears 6 through the annular oil storage grooves formed by the circle center hole flanging structures of the planetary gear gaskets 7, so that the moving parts in the differential mechanism can be fully lubricated. When the main reduction gear 4 is assembled, since the main reduction gear 4 is sleeved on the annular step groove 20 at the left end of the large end flange 19 of the differential housing 1 and then fixed to the differential housing 1 through the flange face bolt 3, in the assembly process of transition fit, the assembly stroke is short, the assembly deformation is avoided, and since the main reduction gear 4 is installed from the large end of the differential housing 1, the window on the differential housing 1 is not shielded, and when the gear on the intermediate shaft is meshed with the main reduction gear 4, more lubricating oil is splashed into the differential housing 1 from the electric drive box through the window of the differential housing 1, so that parts in the differential are more fully lubricated. The oil grooves are paved in the differential case 1, so that when the lubricating oil in the differential is too much, the lubricating oil flows out of the oil grooves, the oil stirring loss caused by too much oil quantity is avoided, and the transmission efficiency is improved. According to the technical scheme, the differential mechanism can enable moving parts inside the differential mechanism to be fully lubricated when the differential mechanism in the prior art works under the condition of low lubricating oil quantity, and friction among the parts is reduced, so that the service life of the differential mechanism is ensured, and the functional failure of a vehicle caused by ablation of the moving parts inside the differential mechanism is avoided.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the utility model, and those skilled in the art will appreciate that the modifications made to the utility model fall within the scope of the utility model without departing from the spirit of the utility model.
Claims (5)
1. An oil-cooled lubricating structure of an electric drive vehicle differential mechanism, comprising a differential mechanism shell (1), characterized in that: the large end and small end axle shaft assembly holes (18) of the differential housing (1) are respectively provided with an end face oil groove (13), the inner walls of the large end and small end axle shaft assembly holes (18) are respectively provided with a spiral oil groove and an end face oil groove (13) which are respectively communicated, the planet gear assembly surfaces of the planet axle assembly holes (16) on the differential housing (1) are respectively provided with a plurality of planet gear lubricating oil grooves (15), the planet gear lubricating oil grooves (15) extend from the orifices of the planet axle assembly holes (16) to the annular oil grooves (11) around the axle gear installation sinking platform along the inner wall of the differential housing (1), the sinking platform end faces of the large end and small end axle shaft assembly holes (18) are respectively provided with a plurality of planet gear lubricating oil grooves (12) which are respectively communicated with the annular oil grooves (11), the planet gear installation sinking platform assembly gears (8) correspond to the planet gear assembly surfaces on the planet gear shafts (5), a plurality of planet gear adjustment gaskets (9) are arranged between the planet gears (8) and the planet gear installation sinking platform, a plurality of oil storage holes (21) are respectively arranged on the planet gear adjustment gaskets (9), the planet gear assembly gaskets (7) are respectively arranged between the planet gears (7) and the planet gear assembly surfaces, a main reduction gear (4) is fixed at the large end of the differential case (1) by a bolt.
2. An oil-cooled lubrication structure for an electrically driven vehicle differential as set forth in claim 1, wherein: the spiral oil groove of the large-end half shaft assembly hole (18) is a left-handed oil groove (14), and the spiral oil groove of the small-end half shaft assembly hole (18) is a right-handed oil groove (17).
3. An oil-cooled lubrication structure for an electrically driven vehicle differential as set forth in claim 1, wherein: the cut-off section of the side gear lubricating oil grooves (12) is V-shaped, and the plurality of side gear lubricating oil grooves (12) are distributed in a rotationally symmetrical mode.
4. An oil-cooled lubrication structure for an electrically driven vehicle differential as set forth in claim 1, wherein: the cut-off section of the planetary gear lubricating oil grooves (15) is U-shaped, and a plurality of planetary gear lubricating oil grooves (15) are distributed in a cross shape.
5. An oil-cooled lubrication structure for an electrically driven vehicle differential as set forth in claim 1, wherein: the large end of the differential housing (1) is provided with a flange (19), the left end of the flange (19) is provided with an annular step groove (20) for assembling the main reduction gear (4), a circle center hole of the main reduction gear (4) is sleeved on the annular step groove (20) at the left end of the flange (19) at the large end of the differential housing (1), and the main reduction gear (4) is fixed with the flange (19) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320390536.3U CN219888692U (en) | 2023-03-06 | 2023-03-06 | Oil cooling lubricating structure of electric drive car differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320390536.3U CN219888692U (en) | 2023-03-06 | 2023-03-06 | Oil cooling lubricating structure of electric drive car differential mechanism |
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| CN219888692U true CN219888692U (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320390536.3U Active CN219888692U (en) | 2023-03-06 | 2023-03-06 | Oil cooling lubricating structure of electric drive car differential mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419154A (en) * | 2023-12-18 | 2024-01-19 | 中国第一汽车股份有限公司 | Differential and vehicle |
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2023
- 2023-03-06 CN CN202320390536.3U patent/CN219888692U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419154A (en) * | 2023-12-18 | 2024-01-19 | 中国第一汽车股份有限公司 | Differential and vehicle |
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