CN212028484U

CN212028484U - Two-drive four-drive common interface structure of transmission

Info

Publication number: CN212028484U
Application number: CN202020566008.5U
Authority: CN
Inventors: 韦健; 周亚田; 刘春雨; 薛国春
Original assignee: Shanghai Automobile Gear Works
Current assignee: Shanghai Automobile Gear Works
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-11-27
Anticipated expiration: 2030-04-16

Abstract

A two-drive four-drive common interface structure of a transmission comprises: the differential gear comprises a differential gear shell oil seal and a half shaft oil seal which is arranged at an off-shell side and is arranged in a differential gear shell, wherein the outer surface shape of the differential gear shell oil seal is matched with the shape of a transmission shell, and the shape of an inner lip is matched with the shape of an outer cylindrical surface of the differential gear shell so as to seal lubricating oil from a bearing; the half shaft oil seal is arranged inside the differential case, the shape of the outer surface of the half shaft oil seal is matched with the shape of the inner hole surface of the differential case, and the shape of the inner lip is matched with the shape of the outer cylindrical surface of the half shaft oil seal so as to seal oil inside the transmission. The oil seal arrangement of this device through the adjustment from the shell side can supply two to drive and four to drive the sharing to better realization whole car modularization design theory.

Description

Two-drive four-drive common interface structure of transmission

Technical Field

The utility model relates to a technique in automotive transmission field specifically is a derailleur two drive four drive sharing interface structure.

Background

With the vigorous development of the automobile industry, the demand of customers for power is higher and higher. Two-wheel drive and four-wheel drive vehicles are transported out. OEM design considerations based on platform require that a vehicle require a two-drive and four-drive capability. As industrialization matures, OEM demand for transmissions has increased. The two-wheel drive type and the four-wheel drive type are not respectively provided with a transmission like the traditional concept, but a unified interface is needed, and the two-wheel drive type and the four-wheel drive type can be applied to one transmission, so that the management and the after sale are convenient.

As shown in figure 1, for the two-wheel drive design condition of the transmission, half shafts are respectively inserted from the main shell side and the off-shell side to be matched with the spline of the half shaft teeth, and are matched with the inner lips of oil seals 1 and 2 to prevent oil from seeping. However, as shown in fig. 2, the four-wheel drive type is not shared with the two-wheel drive interface because the power is required to be transmitted through the connection of the differential case spline and the PTU.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an it improves to the above-mentioned not enough of prior art existence, provides a derailleur two and drives four and drive common interface structure, through differential mechanism casing oil blanket and the change of off-shell side axle oil blanket position and cooperation relation, the derailleur of realization both can carry on two and drive the motorcycle type and can carry on four and drive the motorcycle type to the whole car modular design theory of better realization.

The utility model discloses a realize through following technical scheme:

the utility model discloses a: differential housing oil seal and half-shaft oil seal, wherein: the shape of the outer surface of the differential shell oil seal is matched with the shape of the transmission shell, and the shape of the inner lip is matched with the shape of the outer cylindrical surface of the differential shell so as to seal lubricating oil from the bearing; the half shaft oil seal is arranged inside the differential case, the shape of the outer surface of the half shaft oil seal is matched with the shape of the inner hole surface of the differential case, and the shape of the inner lip is matched with the shape of the outer cylindrical surface of the half shaft oil seal so as to seal oil inside the transmission.

Technical effects

Compared with the prior art, the utility model discloses when being applicable to the four wheel drive motorcycle type, need not to seal at the transfer case, the transfer case only need with differential mechanism casing splined connection transmission power. When the transmission is applicable to two driving vehicle types, the differential shell does not need to transmit power, only the half shaft extends into the differential shell and is connected with the half shaft teeth in a spline mode to transmit power, and in addition, the smooth surface of the half shaft is matched with the lip of the oil seal to realize the sealing of oil in the transmission.

Drawings

FIGS. 1 and 2 are prior art schematic diagrams;

FIG. 3 is a schematic structural view of the present invention;

in the figure: the differential gear comprises a differential gear shell oil seal 1, an off-shell side half shaft oil seal 2, a main-shell side half shaft oil seal 3, a differential conical bearing 4, a differential gear shell 5, a transmission shell 6, a guide angle 7, a differential gear shell outer cylindrical surface a, a differential gear shell inner hole surface b, a differential gear shell spline c, a half shaft spline d and a half shaft spline f.

Detailed Description

As shown in fig. 3, this embodiment relates to a transmission two-wheel drive four-wheel drive sharing interface structure, and the effect that the four-wheel drive transmission can be applied to two-wheel drive type is achieved through the change of the position of the differential housing oil seal and the off-housing side half shaft oil seal and the matching relationship, wherein: the outer surface of the differential case oil seal 1 is in interference fit with the transmission case 6, and needs to be pressed into a certain depth in the axial direction to avoid a transfer case, and the inner lip is in interference fit with the outer cylindrical surface a of the differential case 5, so that oil lubricated by the bearing 4 is sealed finally; the clutch side half shaft oil seal 2 is arranged inside the differential case 5, and the outer cylindrical surface of the clutch side half shaft oil seal is in interference fit with the inner hole surface b of the differential case, and the inner lip is in interference fit with the outer cylindrical surface of the half shaft to realize the sealing of oil inside the transmission.

The roughness of the matching surfaces of the outer surfaces of the differential case oil seal and the half shaft oil seal and the transmission case and the differential case which are matched with each other is required to be less than Ra0.8.

The roughness of the matching surfaces of the inner lips of the differential case oil seal and the half shaft oil seal and the outer cylindrical surface of the half shaft in the shape of the outer cylindrical surface of the differential case matched with each other is Ra0.2-0.63, the shaft eccentricity is not more than 0.2, and the shaft play is not more than 2 mm.

In order to ensure that the oil seal is not scratched in the assembling process, the front end of the differential shell 5 is provided with a guide angle 7, and the specific structure of the guide angle 7 is 2mm of guide distance and 20 degrees of guide angle.

The sealing of the transmission and the transfer case is moved to the transmission from transfer case, so that the transmission is applied to two drives without worrying about the oil leakage of the transmission.

The half shaft oil seal 2 is arranged in the differential shell, and a transfer case is avoided.

The differential outer cylindrical surface and the differential inner hole surface of the differential shell 5 are functional surfaces and are respectively matched with the two oil seals.

When the device is used for a two-wheel drive vehicle, only the half shaft needs to extend into the gear to be matched with the half shaft spline d and sealed with the inner lip of the oil seal. In addition, because the oil seal is built-in, the function of preventing muddy water, sand and stone is not carried out, and the half shaft needs to be protected by a dust cover in a press fitting mode.

When the device is used for a four-wheel drive vehicle, only the PTU spline and the differential shell spline c are matched to transmit power, the half shaft penetrates through the inner hole of the transfer case to extend into the transmission to be matched with the half shaft spline d and sealed with the inner lip of the oil seal, and the half shaft is positioned through the guide of the transfer case in the assembling process to prevent the front end spline from scratching the oil seal.

The device distinguishes the lubricating oil of the bearing from the oil stirring of a differential system by newly adding the oil seal at the end of the speed changer and adjusting the position of the half shaft oil seal, so that the compatibility of different interface forms of two-wheel drive and four-wheel drive can be realized. In addition, the interfaces of the main shell sides of the two-wheel drive vehicle and the four-wheel drive vehicle are consistent, and the half shafts extend into the main shell sides to be matched with the half shaft splines f and are sealed with the half shaft oil seals 3.

The foregoing embodiments may be modified in various ways by those skilled in the art without departing from the spirit and scope of the present invention, which is not limited by the above embodiments but is to be accorded the full scope defined by the appended claims, and all such modifications and variations are within the scope of the invention.

Claims

1. A transmission two-drive four-drive common interface structure is characterized by comprising: differential case oil blanket and off-shell side just place the semi-axis oil blanket in the differential case in, wherein: the shape of the outer surface of the differential shell oil seal is matched with the shape of the transmission shell, and the shape of the inner lip is matched with the shape of the outer cylindrical surface of the differential shell so as to seal lubricating oil from the bearing; the half shaft oil seal is arranged inside the differential case, the shape of the outer surface of the half shaft oil seal is matched with the shape of the inner hole surface of the differential case, and the shape of the inner lip is matched with the shape of the outer cylindrical surface of the half shaft oil seal so as to seal oil inside the transmission.

2. The transmission two-drive four-drive common interface structure according to claim 1, wherein the roughness of the matching surfaces of the outer surfaces of the differential case oil seal and the half-shaft oil seal and the transmission case and the differential case which are matched with each other is less than Ra0.8;

the roughness of the matching surfaces of the inner lips of the differential case oil seal and the half shaft oil seal and the outer cylindrical surface of the half shaft in the shape of the outer cylindrical surface of the differential case matched with each other meets Ra0.2-0.63, the shaft eccentricity is not more than 0.2, and the shaft play is not more than 2 mm.

3. A transmission two-drive four-drive common interface structure as recited in claim 1, wherein said differential case has a lead angle at a front end thereof.

4. A transmission two-drive four-drive common interface structure according to claim 1, wherein the differential outer cylindrical surface and the differential inner bore surface of the differential case are functional surfaces respectively engaged with two oil seals.

5. A transmission two-drive four-drive common interface structure according to claim 3, wherein said guide angle structure is a guide distance of 2mm and a guide angle of 20 °.