CN213088718U - Differential mechanism lubricating structure and automobile speed reducer - Google Patents
Differential mechanism lubricating structure and automobile speed reducer Download PDFInfo
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- CN213088718U CN213088718U CN202021304244.6U CN202021304244U CN213088718U CN 213088718 U CN213088718 U CN 213088718U CN 202021304244 U CN202021304244 U CN 202021304244U CN 213088718 U CN213088718 U CN 213088718U
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Abstract
The utility model provides a differential lubrication structure and an automobile speed reducer, wherein the differential is positioned in a speed reducer shell and comprises a differential shell, a half axle gear and a planetary gear, wherein the half axle gear and the planetary gear are positioned in the differential shell; the differential lubrication structure comprises a window hole positioned on the differential shell and an oil stirring gear positioned in the differential shell; the oil stirring gear is opposite to the window hole, and the oil stirring gear drives lubricating oil in the speed reducer shell to enter the differential shell through the window hole when rotating. The embodiment of the utility model provides a through increase the fenestra at the differential mechanism shell to with the cooperation of oil mixing gear, make oil mixing gear rotate the time lubricating oil that can drive in the speed reducer shell and pass through the fenestra and get into the differential mechanism shell, thereby can provide sufficient lubricating oil film protection for planetary gear and the differential side gear in the differential mechanism shell.
Description
Technical Field
The embodiment of the utility model provides a relate to the reduction gear field, more specifically say, relate to a differential mechanism lubricating structure and automobile speed reducer.
Background
When the automobile runs in a turn or on an uneven road surface, the left wheel and the right wheel roll at different rotating speeds through a differential mechanism, namely, the pure rolling mode motion of the driving wheels at two sides is ensured.
The differential can be regarded as a partial assembly in the speed reducer part and consists of a differential shell, a half axle gear, a planetary gear, a cross shaft and other parts. When the differential mechanism performs a differential operation, the planetary gears and the side gears are engaged and relatively move at an extremely high speed. Without adequate lubrication film protection, the relatively rubbing surfaces between the planet gears and the side gears can "cold weld" due to transient pressure and temperature increases, causing localized material migration, creating an ablation event, and resulting in failure of the differential. Therefore, good lubrication is critical to proper operation of the differential.
In the existing speed reducer, the differential is lubricated mainly by a splash lubrication mode of rotating and stirring oil of a shaft and a gear when the speed reducer system works and a special lubricating oil channel in the speed reducer. The splash lubrication reducer lubrication structure mainly comprises a gear, a shaft system and corresponding oil guide grooves, oil baffle plates, oil holes and the like on a shell.
In order to ensure higher energy density, the reducer of the new energy automobile needs to reduce the weight as much as possible, and the arrangement is generally compact. Due to space limitation, the forced lubrication of the speed reducer of the new energy automobile is difficult to realize. In addition, too many oil baffle plates, oilholes can produce more local vortex, will increase greatly and stir oil loss and efficiency loss.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a reduction gear to above-mentioned new energy automobile receives space restriction, and force-feed lubrication realizes more difficulty to and too much fender oil board, oilhole have increased the problem of stirring oil loss and efficiency loss, provide a new differential mechanism lubricating structure and automobile reducer.
The embodiment of the present invention provides a differential lubrication structure, wherein the differential is located in a speed reducer housing, and the differential includes a differential housing, and a half axle gear and a planetary gear located in the differential housing; the differential lubrication structure comprises a window hole positioned on the differential shell and an oil stirring gear positioned in the differential shell; the oil stirring gear is opposite to the window hole, and the oil stirring gear drives lubricating oil in the speed reducer shell to enter the differential shell through the window hole when rotating.
Preferably, the window hole is opposed to a tooth surface of the side gear in the differential case.
Preferably, the differential case includes a plurality of window holes, and the plurality of window holes are evenly distributed in a circumferential direction on the differential case.
Preferably, the rotating shaft of the oil stirring gear is parallel to the rotating shaft of the side gear; the rotating shaft of the oil stirring gear is positioned above or obliquely above the rotating shaft of the half axle gear, and the rotating direction of the oil stirring gear is opposite to that of the differential case.
Preferably, the window hole is located on a circumferential surface of the differential case, and an axial dimension of the window hole is larger than a pitch of the two side gears.
Preferably, the tooth surface of the oil stirring gear is opposite to the window hole, and the distance between the tooth surface of the oil stirring gear and the differential case at the position of the window hole is smaller than or equal to a preset value.
Preferably, the window hole corresponds to a central angle of not less than 30 ° in a circumferential direction of an outer circumferential surface of the differential case.
Preferably, a driving shaft is arranged in the speed reducer shell, a driving gear for driving the differential to rotate is arranged on the driving shaft, and the oil stirring gear is located on the driving shaft.
Preferably, the reducer casing comprises a driving gear and a driven shaft driven by the driving gear, and the oil stirring gear is located on the driven shaft.
The embodiment of the utility model provides a still provide a reduction gear, including reduction gear shell, differential mechanism and as above differential mechanism lubricating structure.
Implement the utility model discloses differential mechanism lubricating structure and automobile speed reducer have following beneficial effect: through increasing the fenestra at the differential case to and reasonable shafting arranges, make fenestra and oil mixing gear's the opposite setting of oil throwing direction, can drive the lubricating oil in the reduction gear case and pass through the fenestra and get into the differential case when making oil mixing gear rotate, thereby can provide sufficient lubricating oil film protection for planetary gear and the side gear in the differential case.
Drawings
Fig. 1 is a schematic view of a differential lubrication structure according to an embodiment of the present invention;
fig. 2 is another schematic diagram of a differential lubrication structure provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-2, the schematic diagram of the differential lubrication structure provided by the embodiment of the present invention is applicable to an automobile speed reducer, and the lubrication of the internal gear of the differential is realized. In the present embodiment, the differential is located in the speed reducer case, and the differential includes a differential case 11, and side gears and planetary gears located in the differential case 11; the differential lubrication structure of the present embodiment includes a window hole 111 in the differential case 11, and an oil stirring gear 12 in the gear case. The oil stirring gear 12 is disposed opposite to the window hole 111 of the differential case 11, and the oil stirring gear 12 drives the lubricating oil in the speed reducer case to enter the differential case 11 through the window hole 111 when rotating.
Specifically, when the oil slinger 12 rotates, the lubricating oil adhered to the tooth surfaces thereof is thrown out by the centrifugal force, and when the window hole 111 of the differential case 11 rotates following the differential case 11 to be opposed to the tooth surfaces of the oil slinger 12, part of the lubricating oil thrown out by the oil slinger 12 enters the differential case 11 through the window hole 111, thereby lubricating the side gears and the planetary gears in the differential case 11.
According to the differential lubrication structure, the window hole 111 is additionally formed in the differential shell 11, and the reasonable shafting arrangement is adopted, so that the window hole and the oil throwing direction of the oil stirring gear 12 are oppositely arranged, the lubricating oil in the speed reducer shell can be driven to enter the differential shell 11 through the window hole 111 when the oil stirring gear 12 rotates, and sufficient lubricating oil film protection can be provided for the planetary gear and the half axle gear in the differential shell.
In an embodiment of the present invention, the window hole 111 is opposite to the tooth surface of the side gear in the differential case 11, that is, the window hole 111 is located outside the tooth surface of the side gear, so that when the window hole 111 rotates to be opposite to the tooth surface of the oil stirring gear 12 following the differential case 11, the lubricating oil thrown out by the oil stirring gear 12 can directly pass through the window hole 111 to reach the tooth surface of the side gear, and the planetary gear obtains the lubricating oil by meshing with the side gear. Through the structure, lubricating oil obtained by the side gear and the planetary gear can be further increased, and the lubricating effect of the differential is improved.
In another embodiment of the present invention, a plurality of window holes 111 may be further provided on the differential case 11, and the plurality of window holes 111 are evenly distributed in the circumferential direction on the differential case 11. The structure can not only ensure the stability of the differential rotation, but also increase the passage of the lubricating oil thrown out by the oil mixing gear 12 into the differential case 11, namely, the lubricating oil thrown out by the oil mixing gear 12 can enter the differential case 11 for a plurality of times when the differential case 11 rotates for one circle.
In another embodiment of the present invention, in order to facilitate the layout and driving of the oil mixing gear 12 in the reducer case, the rotation axis of the oil mixing gear 12 is parallel to the rotation axis of the side gear, so that each window hole 111 is opposite to the oil mixing gear 12 once per one rotation of the differential case 11.
To further increase the amount of lubricating oil entering the differential case 11, the rotating shaft of the oil stirring gear 12 is located above or obliquely above the rotating shaft of the side gear (for example, the angle between the line connecting the center of the cross section of the rotating shaft of the oil stirring gear 12 and the center of the cross section of the rotating shaft of the differential is not less than 30 ° with respect to the horizontal plane), so that, in addition to the lubricating oil thrown directly out by the oil stirring gear 12 and entering the differential case 11 through the window hole 111, part of the lubricating oil carried along by the rotation of the oil stirring gear 12 descends under the action of gravity and enters the differential case 11 through the window hole 111, i.e., the amount of lubricating oil used for lubricating the side gear and the planetary gear is greatly increased.
In yet another embodiment of the present invention, the window 111 is located on the circumferential surface of the differential case 11. In the differential case 11, the two side gears are coaxially disposed with the tooth surfaces of the two side gears facing each other, and by disposing the window holes 111 on the circumferential surface of the differential case 11, the tooth surfaces of the two side gears can simultaneously receive the lubricating oil entering from the window holes 111, and the amount of the lubricating oil received can be large.
In addition, as shown in fig. 2, the tooth surface of the oil stirring gear 12 may be opposed to the window hole 111 (i.e., opposed to the circumferential surface where the window hole 111 is located), and the distance d between the tooth surface of the oil stirring gear 12 and the differential case 11 at the position of the window hole 111 may be smaller than or equal to a preset value. So that the lubricating oil thrown off by the tooth faces of the oil stirring gear 12 can enter more into the differential case 11 and can be directly thrown off to the tooth faces of the side gear in the differential case 11. The preset values can be adjusted according to the precision of each component, and the smaller the preset value is, the better the preset value is on the premise of not influencing the gear transmission of the differential because the differential case 11 rotates along with the differential main body.
To ensure the amount of lubricating oil that enters the differential case 11, the window hole 111 corresponds to a central angle of not less than 30 ° in the circumferential direction of the outer circumferential surface of the differential case 11. In practical applications, the central angle of the window hole 111 in the circumferential direction of the outer circumferential surface of the differential case 11 may be made large, for example, the central angle of the window hole 111 in the circumferential direction of the outer circumferential surface of the differential case 11 may be made 90 °, while ensuring the structural strength.
In an embodiment of the present invention, the reduction gear housing has a driving shaft, the driving shaft has a driving gear thereon, and the driving gear is engaged with the disk teeth 13 of the differential, so as to drive the differential to rotate through the driving shaft and the driving gear. The oil stirring gear 12 is positioned on the driving shaft and is driven by the driving shaft to rotate, so that oil stirring is realized.
In another embodiment of the present invention, the reducer casing includes a driving gear and a driven shaft driven by the driving gear, i.e. the driving gear is located on the driving shaft and outputs torque through the driving shaft; the driven shaft is provided with a driven gear meshed with the driving gear, namely the driven shaft is driven to rotate by the driving gear (the differential mechanism can be driven to rotate by another driving gear on the driven shaft). The oil stirring gear 12 is positioned on the driven shaft and rotates along with the driven shaft to realize oil stirring and oil throwing.
The embodiment of the utility model provides a still provide an automobile speed reducer, this automobile speed reducer include speed reducer shell, differential mechanism and as above differential mechanism lubricating structure, and differential mechanism interior side gear and planetary gear realize lubricating through above-mentioned differential mechanism lubricating structure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A differential lubrication structure, the differential being located within a differential case, and the differential including a differential case, and side gears and planetary gears located within the differential case; the lubricating structure of the differential is characterized by comprising a window hole positioned on the differential shell and an oil stirring gear positioned in the differential shell; the oil stirring gear is opposite to the window hole, and the oil stirring gear drives lubricating oil in the speed reducer shell to enter the differential shell through the window hole when rotating.
2. A differential lubrication structure as defined in claim 1, wherein said window hole is opposed to a tooth surface of a side gear in said differential case.
3. A differential lubrication structure as claimed in claim 1, wherein said differential case includes a plurality of window holes, and said plurality of window holes are evenly distributed in a circumferential direction on said differential case.
4. A differential lubrication structure as claimed in claim 1, wherein the rotational axis of said oil slinger gear is parallel to the rotational axis of said side gear; the rotating shaft of the oil stirring gear is positioned above or obliquely above the rotating shaft of the half axle gear, and the rotating direction of the oil stirring gear is opposite to that of the differential case.
5. A differential lubrication structure as defined in claim 4, wherein the window hole is located on a circumferential surface of the differential case, and an axial dimension of the window hole is larger than a pitch of the two side gears.
6. The differential lubrication structure according to claim 1, wherein tooth surfaces of the oil slinger are opposed to the window hole, and a distance between the tooth surfaces of the oil slinger and the differential case at the position of the window hole is smaller than or equal to a preset value.
7. A differential lubrication structure according to claim 1, wherein the window hole corresponds to a central angle of not less than 30 ° in a circumferential direction of the outer circumferential surface of the differential case.
8. A differential lubrication structure as claimed in claim 1, wherein a drive shaft is provided in said speed reducer case, and a drive gear for driving said differential to rotate is provided on said drive shaft, said oil slinger being provided on said drive shaft.
9. A differential lubrication structure as claimed in claim 1, wherein a drive gear and a driven shaft driven by the drive gear are included in the speed reducer case, and the oil slinger gear is located on the driven shaft.
10. A speed reducer for an automobile, characterized by comprising a speed reducer case, a differential, and the differential lubrication structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304244.6U CN213088718U (en) | 2020-07-06 | 2020-07-06 | Differential mechanism lubricating structure and automobile speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304244.6U CN213088718U (en) | 2020-07-06 | 2020-07-06 | Differential mechanism lubricating structure and automobile speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213088718U true CN213088718U (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021304244.6U Active CN213088718U (en) | 2020-07-06 | 2020-07-06 | Differential mechanism lubricating structure and automobile speed reducer |
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| Country | Link |
|---|---|
| CN (1) | CN213088718U (en) |
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2020
- 2020-07-06 CN CN202021304244.6U patent/CN213088718U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221230 Address after: 215104 No. 52, tiandang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. Address before: No.16, Youxiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215104 No. 52, tiandang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |