Self-lubricating bevel gear differential and automobile

Abstract

The utility model provides a self-lubricating bevel gear differential and an automobile. The self-lubricating bevel gear differential comprises: a housing; a planetary gear shaft; a planetary gear attached to the planetary gear shaft; a planetary gear gasket padded between the housing and the planetary gear; a side gear connected to the half shaft; and the side gear gasket is cushioned between the shell and the side gear. A plurality of lubricating holes are formed in at least one of contact surfaces which can be formed by the shell, the planetary gear shaft, the planetary gear, the planetary gear gasket, the side gear and the side gear gasket and make contact with one another, first lubricating media are arranged in the lubricating holes, second lubricating media can flow into the lubricating holes, and the second lubricating media are lubricating oil. The lubricating holes are formed in the contact surfaces, the lubricating media are actively arranged in the lubricating holes, compatibility is high, an oil storage / guide channel does not need to be additionally arranged, the differential mechanism can be applied to a wet type environment and a dry type environment at the same time, adhesion abrasion caused by dry friction can be avoided, and the service life of the differential mechanism is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to bevel gear differential, especially self-lubricating bevel gear differential, automobile. BACKGROUND

[0002] In the existing bevel gear differential, in order to improve the wear resistance of gears, shafts and other components, the common treatment method is to harden the surface of the components or add special coating. However, these treatment methods still have certain deficiencies.

[0003] For example, gasket wear is repeatedly observed in differential durability tests.

[0004] The side gear rotates relative to the housing, and a side gear gasket is needed to improve its wear resistance and be lubricated by the lubricating oil of the gearbox. The planet gear rotates relative to the support, and a planet gear gasket is needed to improve its wear resistance and be lubricated by the lubricating oil of the gearbox.

[0005] Because the gears, shafts and gaskets are covered by the housing, it is difficult for the lubricating oil of the gearbox to enter the internal cavity of the differential, and the rotation of the gears will also cause the lubricating oil to be thrown out. When the relative motion position cannot be sufficiently lubricated by oil, the gasket, shaft and gear may be subject to adhesive wear, and in the worst case, they may be sintered, losing the function of transmitting torque and rotational speed, and shortening the service life of the differential. CONTENT OF THE INVENTION

[0006] In order to solve or alleviate at least one problem mentioned in the background art, the present application provides a self-lubricating bevel gear differential and an automobile.

[0007] The self-lubricating bevel gear differential provided by the embodiments of the present application comprises:

[0008] a housing;

[0009] a planet gear shaft mounted in the housing;

[0010] a planet gear assembled on the planet gear shaft;

[0011] a planet gear gasket interposed between the housing and the planet gear;

[0012] a side gear for connection to a half shaft;

[0013] a side gear gasket interposed between the housing and the side gear, characterized in that,

[0014] At least one of the contact surfaces of the housing, the planetary gear shaft, the planetary gear, the planetary gear spacer, the side gear, and the side gear spacer is provided with a plurality of lubrication holes, the first lubricating medium is arranged in the lubrication holes, and the second lubricating medium, which is lubricating oil, can flow into the lubrication holes.

[0015] In one embodiment, the first lubricating medium is a solid lubricant.

[0016] In one embodiment, the first lubricating medium is one of graphene, molybdenum disulfide, and grease.

[0017] In one embodiment, the planetary gear shaft is provided with a plurality of the lubrication holes on the outer circumferential surface of the planetary gear.

[0018] In one embodiment, the planetary gear is provided with a plurality of the lubrication holes on the end surface of the planetary gear spacer.

[0019] In one embodiment, the planetary gear spacer is provided with a plurality of the lubrication holes on the surface of the housing and / or on the surface of the planetary gear.

[0020] In one embodiment, the side gear is provided with a plurality of the lubrication holes on the end surface of the side gear spacer.

[0021] In one embodiment, the side gear spacer is provided with a plurality of the lubrication holes on the surface of the housing and / or on the surface of the side gear.

[0022] In one embodiment, the planetary gear spacer and / or the side gear spacer is provided with a plurality of the lubrication holes in the form of through holes.

[0023] The automobile provided by the embodiments of the present application comprises the self-lubricating bevel gear differential as described above.

[0024] Compared with the conventional oil-lubricated differential, the self-lubricating bevel gear differential provided by the present application is provided with lubrication holes on the contact surface, and the lubricating medium is actively arranged in the lubrication holes, which has high compatibility, can not (but not excluded) additionally increase the oil storage / oil guide channel, can be applied to wet / dry environments at the same time, can avoid adhesive wear caused by dry friction, and increases the service life of the differential.

[0025] Compared with the lubrication device mounted on the components, the way of directly machining the lubrication holes on the components in the present application can avoid increasing additional parts, does not increase the complexity of the system, can realize the lubrication function in the form of the most compact differential required space, and meets the lightweight trend direction of the differential. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A cross-sectional view of a self-lubricating bevel gear differential according to an embodiment of the present application is shown.

[0027] Figure 2 An exploded schematic view of a self-lubricating bevel gear differential according to an embodiment of the present application is shown.

[0028] Figure 3 An isometric view of a planetary gear shaft according to an embodiment of the present application is shown.

[0029] Figure 4 An isometric view of a planetary gear according to an embodiment of the present application is shown.

[0030] Figure 5 An isometric view of a planetary gear spacer according to an embodiment of the present application is shown.

[0031] Figure 6 An isometric view of a side gear according to an embodiment of the present application is shown.

[0032] Figure 7 An isometric view of a side gear spacer according to an embodiment of the present application is shown.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 100 housing

[0035] 210 planetary gear shaft

[0036] 220 planetary gear

[0037] 230 planetary gear spacer

[0038] 310 side gear

[0039] 320 side gear spacer

[0040] 400 lubrication hole DETAILED DESCRIPTION

[0041] Exemplary embodiments of the present application are described herein below with reference to the accompanying drawings. It is to be understood that the specific examples are merely illustrative of the present application and are not to be used to limit the scope of the present application. As such, the following description is not meant to limit the present application to the specific embodiments described.

[0042] Embodiments of the present application provide a self-lubricating bevel gear differential (hereafter, sometimes simply referred to as "differential").

[0043] Referring to Figure 1 , Figure 2The self-lubricating bevel differential gear here can include a housing 100; a planetary gear shaft 210 installed in the housing 100; a planetary gear 220 assembled on the planetary gear shaft 210; a planetary gear gasket 230 padded between the housing 100 and the planetary gear 220; a side gear 310 for being connected to a half shaft (not shown in the figure); and a side gear gasket 320 padded between the housing 100 and the side gear 310.

[0044] Further, in the embodiments of the present application, at least one of the contact surfaces formed by the mutual contact of the housing 100, the planetary gear shaft 210, the planetary gear 220, the planetary gear gasket 230, the side gear 310, and the side gear gasket 320 is provided with a plurality of lubricating holes 400, and the first lubricating medium is arranged in the lubricating holes 400. The second lubricating medium, which is lubricating oil, can also flow into the lubricating holes 400. For example, the lubricating oil in the differential gear can flow into the lubricating holes 400 of the differential gear.

[0045] Compared with the conventional oil-lubricated differential gear, the present application has high compatibility, can not (but not excluded) additionally increase the oil storage and oil guiding channels, can be applied to wet and dry environments at the same time, can avoid the adhesive wear caused by dry friction, and increases the service life of the differential gear.

[0046] Compared with the lubricating device mounted on the components, the present application directly processes the lubricating holes 400 on the components, which can avoid increasing additional parts, does not increase the complexity of the system, can achieve the lubricating function in the form of the minimum space required by the differential gear, and meets the lightweight trend direction of the differential gear.

[0047] Exemplarily, the plurality of lubricating holes 400 can be arranged in the form of an array or a mosaic. The lubricating holes 400 can be through holes or blind holes (to be introduced later), and can also be in the form of a pit or other blind holes with a smaller depth.

[0048] In an embodiment of the present application, the first lubricating medium is a solid lubricant, such as graphene or molybdenum disulfide. The first lubricating medium can also be ordinary lubricating grease. Non-limitingly, the first lubricating medium can be at least one of graphene, molybdenum disulfide, and lubricating grease. These lubricating media can be mass-produced, and have good market application feedback. The raw materials and production and manufacturing processes are mature and reliable.

[0049] In an embodiment of the present application, referring to Figure 3 The contact surface of the planetary gear shaft 210 on the outer circumferential surface of the planetary gear 220 can be provided with a plurality of lubricating holes 400.

[0050] Referring to Figure 4 The contact surface of the planetary gear 220 on the end surface of the planetary gear gasket 230 can be provided with a plurality of lubricating holes 400.

[0051] Referring to Figure 5 The face of the planet gear gasket 230 that contacts the housing 100 and / or the face of the planet gear 220 can be provided with a plurality of lubrication holes 400.

[0052] Referring to Figure 6 The end face of the side gear 310 that contacts the side gear gasket 320 can be provided with a plurality of lubrication holes 400.

[0053] Referring to Figure 7 The face of the side gear gasket 320 that contacts the housing 100 and / or the face of the side gear 310 can be provided with a plurality of lubrication holes 400.

[0054] The planet gear gasket 230 and / or the side gear gasket 320 can be provided with a plurality of lubrication holes 400, and the lubrication holes 400 are through holes to lubricate the friction faces of the opposite faces that contact each other. The holes in other components can be blind holes.

[0055] The self-lubricating bevel gear differential provided in the application is not only suitable for welded differentials, but also suitable for bolted differentials, and has a wide range of applications.

[0056] The application further provides a gearbox, a vehicle power system and an automobile. The self-lubricating bevel gear differential can be arranged in the gearbox or the vehicle power system, and the automobile can include the self-lubricating bevel gear differential, the gearbox or the vehicle power system as described above. The automobile herein can be a pure electric vehicle, a fuel vehicle or a hybrid vehicle.

[0057] The above is the preferred embodiment of the application, and it should be pointed out that for those skilled in the art, without departing from the principles of the application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A self-lubricating bevel gear differential, comprising: case; Planetary gear shaft, which is mounted in the housing; Planetary gears, which are mounted on the planetary gear shaft; Planetary gear shims are placed between the housing and the planetary gears; Side gear, used to connect to the half shaft; A side gear washer, placed between the housing and the side gear, characterized in that... In the contact surfaces that can be formed by the housing, the planetary gear shaft, the planetary gear, the planetary gear washer, the side gear, and the side gear washer, at least one of the contact surfaces is provided with a plurality of lubrication holes, a first lubricating medium is provided in the lubrication holes, and a second lubricating medium, which is lubricating oil, can also flow into the lubrication holes.

2. The self-lubricating bevel gear differential according to claim 1, characterized in that, The first lubricating medium is a solid lubricant.

3. The self-lubricating bevel gear differential according to claim 1, characterized in that, The first lubricating medium is one of graphene, molybdenum disulfide, and grease.

4. The self-lubricating bevel gear differential according to claim 1, characterized in that, The planetary gear shaft has multiple lubrication holes on the outer circumferential surface of the planetary gear that contact the planetary gear.

5. The self-lubricating bevel gear differential according to claim 1, characterized in that, The planetary gear has multiple lubrication holes on its end face that contacts the planetary gear washer.

6. The self-lubricating bevel gear differential according to claim 1, characterized in that, The planetary gear shim has a plurality of lubrication holes on the surface that contacts the housing and / or the surface that contacts the planetary gear.

7. The self-lubricating bevel gear differential according to claim 1, characterized in that, The side gear has multiple lubrication holes on its end face that contacts the side gear gasket.

8. The self-lubricating bevel gear differential according to claim 1, characterized in that, The side gear shim has a plurality of lubrication holes on the surface that contacts the housing and / or the surface that contacts the side gear.

9. The self-lubricating bevel gear differential according to claim 1, characterized in that, The planetary gear shim and / or the side gear shim are provided with multiple through-hole lubrication holes.

10. A car, characterized in that, The self-lubricating bevel gear differential includes any one of claims 1 to 9.

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