CN219692202U - Main reducer assembly of electric axle - Google Patents

Abstract

The utility model discloses a main speed reducer assembly of an electric axle, which comprises a speed reducer shell, an input part, a middle part and a differential mechanism part, wherein the three parts are connected through gear engagement, a ball bearing is arranged in the input shaft, a cone bearing is arranged in the middle part, and a tapered roller bearing is arranged in the differential mechanism part. According to the utility model, the reliability of the bearing is improved through bearing selection and gap adjustment; the tightness of the oil seal is improved by reducing the movement quantity of the oil seal; the semi-axle is connected with the end face teeth for the transmission shaft, so that the loosening and retreating problem of the bolts is effectively prevented.

Description

Main reducer assembly of electric axle

Technical Field

The utility model relates to a main speed reducer assembly of an electric axle, and belongs to the technical field of automobile parts.

Background

At present, the electric axle main speed reducer assembly with two-stage speed reduction has a simple structure and is widely applied in the market. However, problems of early failure of the bearing, oil leakage of the output shaft oil seal and loosening and withdrawing of the connecting bolt of the transmission shaft frequently occur. In order to solve the problems in the background technology, the utility model provides a novel technical scheme of the main speed reducer assembly of the electric vehicle axle.

Disclosure of Invention

The utility model is realized by the following technical scheme:

the electric axle main speed reducer assembly is characterized by comprising a speed reducer shell, wherein an input part, a middle part and a differential mechanism part are arranged in the speed reducer shell; the input part comprises an input shaft and a driving cylindrical gear A; the middle part comprises a middle shaft, a driven cylindrical gear A and a driving cylindrical gear B; the differential mechanism part comprises a differential mechanism assembly, a differential mechanism shell and a driven cylindrical gear B; the driving cylindrical gear A is arranged on the input shaft, the driven cylindrical gear A and the driving cylindrical gear B are arranged at the middle section of the intermediate shaft, and the driving cylindrical gear B is arranged on the differential mechanism assembly; the driving cylindrical gear A is in meshed connection with the driven cylindrical gear A, and the driving cylindrical gear B is in meshed connection with the driven cylindrical gear B.

Further, the input part further comprises a ball bearing, an adjusting gasket and an oil seal, wherein the ball bearing is fixed on the input shaft; one side of the ball bearing is provided with the adjusting gasket, and the other side of the ball bearing is provided with the oil seal.

Further, the middle part further comprises a cone bearing and an adjusting washer, the cone bearing is arranged at the top and the bottom of the middle shaft, and the adjusting washer is arranged at one side of the cone bearing.

Further, the differential part further comprises a tapered roller bearing, a half shaft gear washer, a planetary gear washer and a cross shaft; the tapered roller bearings are respectively arranged at the top and the bottom of the differential mechanism assembly; the differential mechanism shell is provided with an inner hole, the half shaft is inserted into the half shaft gear from the inner hole, is in clearance fit with the differential mechanism shell, is in spline connection with the half shaft gear, performs axial limiting through a steel wire clamp spring, and is provided with the half shaft gear gasket between the half shaft and the differential mechanism shell; the inside of the differential case is provided with the cross shaft, the planetary gears are arranged on the cross shaft, and the planetary gear washers are arranged between the planetary gears and the inner wall of the differential case.

Further, the half shaft is of an end face tooth structure, and a spiral lubrication groove is formed in the inner hole of the differential shell; and chamfer angles are arranged at two ends of the internal spline of the half shaft gear.

Furthermore, the driving cylindrical gear A, the driven cylindrical gear A, the driving cylindrical gear B and the driven cylindrical gear B are helical cylindrical gears.

Further, the driven cylindrical gear B is fixedly connected with the differential housing on the left side and the right side through bolts.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the utility model improves the reliability of the bearing through bearing structure selection and axial clearance adjustment measures, and prevents early failure of the bearing.

2. According to the utility model, the axial movement of the oil seal rotating shaft is reduced, so that the sealing reliability of the oil seal is improved.

3. The utility model adopts the semi-axle and the transmission shaft which are connected by the end face teeth, thereby effectively preventing the loosening and retreating problems of the connecting bolts.

Drawings

FIG. 1 is a schematic view of the whole of the present utility model.

Fig. 2 is a schematic diagram of the internal structure of the main component.

FIG. 3 is a schematic diagram of a shafting installation position.

FIG. 4 is a schematic diagram of a differential assembly.

In the figure:

1. the driving cylindrical gear B and the planetary gear 4 are arranged on the input shaft 2;

5. differential case, driven cylindrical gear B, 7 cross shaft, 8 tapered roller bearing A,

9. Side gear, 10 driven cylindrical gear A, 11 conical bearing, 12 adjusting washer,

13. Driving cylindrical gears A and 14, ball bearings 15, adjusting gaskets 16, differential assembly,

17. An adjusting washer, 18, a half shaft gear washer, 19, a half shaft, 20, a planetary gear washer,

21. A final drive housing.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, the present utility model provides an electric axle main reduction assembly, which comprises a speed reducer housing 5, an input shaft 1, an intermediate shaft 2 and a differential assembly 16.

An input stage driving gear 13 is arranged on the input shaft 1, a spacer bush is arranged on one side of the input stage driving gear 13, ball bearings 14 are respectively arranged on the other side of the input stage driving gear 13 and the other side of the spacer bush, an adjusting washer 17 is arranged at the tail end of the input shaft 1 to adjust bearing gaps, and an oil seal is arranged at the input end of the input shaft 1 to improve tightness.

An input stage driven gear 10 and an output stage driving gear are arranged in the middle section of the intermediate shaft 2, and conical bearings 11 are respectively arranged at two ends of the intermediate shaft 2.

An output-stage driven gear 6 is arranged on the differential mechanism assembly 16, the output-stage driven gear 6 is connected with the differential mechanism shell 5 through bolts, a planetary gear 4 is arranged in the differential mechanism shell 5, a half-shaft bevel gear meshed with the planetary gear 4, a cross shaft 7 connected with the planetary gear 4, a half shaft 19 connected with the half-shaft gear 9, and a spiral lubricating oil groove is formed in an inner hole of the differential mechanism shell 5. An axial clearance adjusting gasket is arranged between the half shaft and the differential mechanism shell to improve the tightness. Preferably, the cross axle of this patent is two length one short structural style, and there is the recess in the major axis middle part, supplies two sections axles to link firmly.

The main reduction assembly of the utility model is 2-level speed reduction, and the power transmission route is as follows:

the power is input from the input shaft 1, the cross shaft 7 is driven to rotate by a secondary gear pair on the input shaft 1, the intermediate shaft 2 and the differential mechanism assembly 16, the planetary gears 4 revolve and rotate according to the road surface and the running working condition of the vehicle, and the power is split and output to two sides by the half shaft gears 9 and the half shafts connected with the half shaft gears in a spline mode.

The embodiments given above are preferred examples for realizing the present utility model, and the present utility model is not limited to the above-described embodiments. Any immaterial additions and substitutions made by those skilled in the art according to the technical features of the technical scheme of the utility model are all within the protection scope of the utility model.

Claims (7)

1. The electric axle main speed reducer assembly is characterized by comprising a speed reducer shell, wherein an input part, a middle part and a differential mechanism part are arranged in the speed reducer shell; the input part comprises an input shaft (1) and a driving cylindrical gear A (13); the middle part comprises a middle shaft (2), a driven cylindrical gear A (10) and a driving cylindrical gear B (3); the differential mechanism part comprises a differential mechanism assembly (16), a differential mechanism shell (5) and a driven cylindrical gear B (6); the driving cylindrical gear A (13) is arranged on the input shaft (1), the driven cylindrical gear A (10) and the driving cylindrical gear B (3) are arranged in the middle section of the intermediate shaft (2), and the driving cylindrical gear B (3) is arranged on the differential mechanism assembly (16); the driving cylindrical gear A (13) is in meshed connection with the driven cylindrical gear A (10), and the driving cylindrical gear B (3) is in meshed connection with the driven cylindrical gear B (6).

2. An electric axle final drive assembly as claimed in claim 1, characterized in that said input further comprises a ball bearing (14), an adjustment washer (15), an oil seal, said ball bearing (14) being fixed to said input shaft (1); one side of the ball bearing (14) is provided with the adjusting gasket (15), and the other side is provided with the oil seal.

3. An electric axle final drive assembly as claimed in claim 1, characterized in that the intermediate part further comprises a conical bearing (11), an adjusting washer (12), the conical bearing (11) being provided at the top and bottom of the intermediate shaft (2), one side of the conical bearing (11) being provided with the adjusting washer (12).

4. The electric axle final drive assembly of claim 1, wherein the differential portion further comprises tapered roller bearings (8), axle shafts (19), side gears (9), side gear washers (18), planetary gears (4), planetary gear washers (20), cross shafts (7); the tapered roller bearings (8) are respectively arranged at the top and the bottom of the differential assembly (16); the differential mechanism shell (5) is provided with an inner hole, the half shaft (19) is inserted into the half shaft gear (9) from the inner hole, is in clearance fit with the differential mechanism shell (5), is in spline connection with the half shaft gear (9), and is axially limited through a steel wire snap spring, and the half shaft gear gasket (18) is arranged between the half shaft (19) and the differential mechanism shell (5); the differential mechanism casing (5) is internally provided with the cross shaft (7), the planet gears (4) are arranged on the cross shaft (7), and the planet gear washers (20) are arranged between the planet gears (4) and the inner wall of the differential mechanism casing (5).

5. The electric axle final drive assembly as set forth in claim 4, wherein: the semi-axle (19) is of an end face tooth structure, and a spiral lubricating oil groove is formed in an inner hole of the differential shell (5); and chamfer angles are arranged at two ends of the internal spline of the half shaft gear (9).

6. An electric axle final drive assembly as set forth in claim 1 wherein: the driving cylindrical gear A (13), the driven cylindrical gear A (10), the driving cylindrical gear B (3) and the driven cylindrical gear B (6) are helical cylindrical gears.

7. An electric axle final drive assembly as set forth in claim 1 wherein: the driven cylindrical gear B (6) is fixedly connected with the differential shell (5) on the left side and the right side through bolts.