CN219366752U

CN219366752U - Speed reducer shell, speed reducer and electric drive assembly

Info

Publication number: CN219366752U
Application number: CN202320250200.7U
Authority: CN
Inventors: 王敏珠; 王永平; 宗伟
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2023-02-07
Filing date: 2023-02-07
Publication date: 2023-07-18
Anticipated expiration: 2033-02-07

Abstract

The application provides a reduction gear casing, include: a main body defining an inner cavity for accommodating a speed reducing member, one side of the main body being provided with a mounting hole so that the speed reducing member can be mounted in the inner cavity through the mounting hole; and a flange configured to be detachably mounted to the main body, wherein the flange is mounted on the side of the main body where the mounting hole is provided, and configured to be fixedly connected with a housing of a motor such that an input shaft in the reduction member can be driven by an output shaft of the motor. The application also provides a speed reducer and an electric drive assembly comprising the speed reducer housing. Through the application, one speed reducer can be matched with motors of different types, so that the universality of equipment is improved.

Description

Speed reducer shell, speed reducer and electric drive assembly

Technical Field

The application relates to the technical field of transmission devices, in particular to a speed reducer shell, a speed reducer comprising the speed reducer shell and an electric drive assembly comprising the speed reducer.

Background

With the importance of environmental protection and the development of new energy technologies, electric vehicles are gradually replacing conventional fuel vehicles and are becoming a trend. In electric vehicles, the motor and the decelerator are typically integrated together to form an integrated electric drive assembly to improve space utilization and device versatility.

In the existing electric drive assembly, the reducer housing and the motor housing are fixedly connected together, so that the input shaft of the reducer and the output shaft of the motor are coupled to achieve power transmission. However, in the existing decelerator, one side of the decelerator housing is provided with a mounting hole such that a deceleration component (e.g., shaft, gear, etc.) is mounted in an inner cavity of the decelerator housing through the mounting hole, and the other side of the decelerator housing opposite to the mounting hole is provided with a shaft hole such that an input shaft of the decelerator is coupled with an output shaft of the motor through the shaft hole. Correspondingly, the other side of the reducer shell, which is provided with the shaft hole, is fixedly connected with the shell of the motor, so that the reducer and the motor form an integrated module. In this case, a single decelerator can usually be matched to only one type of motor. That is, the mechanical interface of the housing of a decelerator can only mate with the mechanical interface of one type of motor. When different types of motors are adopted, the shell of the speed reducer cannot be matched with different types of motor shells, and the structure of the speed reducer shell needs to be changed or a new speed reducer shell needs to be redesigned, so that the universality of the speed reducer is affected.

In addition to the above-described electric drive assemblies for electric vehicles, similar problems exist in other electric drive fields (e.g., machinery, hoisting winches, fans, etc.) that utilize integrated speed reducers and motors.

Accordingly, there is a need for improvements in existing electric drive assemblies for speed reducers and housings therefor.

Disclosure of Invention

The utility model provides a overcome prior art's not enough, provide an improved reduction gear casing, reduction gear and electric drive assembly for a reduction gear can be together with different grade type motor installation through simple, convenient mode, improves the commonality of equipment and reduction in production, installation cost.

According to an aspect of the present application, there is provided a speed reducer housing, wherein the speed reducer housing includes: a main body defining an inner cavity for accommodating a speed reducing member, one side of the main body being provided with a mounting hole so that the speed reducing member can be mounted in the inner cavity through the mounting hole; and a flange configured to be detachably mounted to the main body, wherein the flange is mounted on the side of the main body where the mounting hole is provided, and configured to be fixedly connected with a housing of a motor such that an input shaft in the reduction member can be driven by an output shaft of the motor.

According to an embodiment of the application, the reducer housing further includes a cover plate configured to cover the mounting hole and allow the input shaft to protrude outward through the cover plate.

According to an embodiment of the application, the flange is configured to cover the mounting hole and allow the input shaft to protrude outwardly through the flange.

According to an embodiment of the application, the flange is provided with a plurality of through holes for receiving screws or bolts, such that the flange is fixedly connected with the body and the housing of the motor by means of the screws or bolts.

According to an embodiment of the application, the flange is provided with a flange positioning portion, which is matched with a main body positioning portion of the main body and/or a motor positioning portion of a housing of the motor.

According to an embodiment of the present application, the flange positioning portion is one of a protrusion and a groove, and the main body positioning portion and the motor positioning portion are the other of the protrusion and the groove.

According to an embodiment of the application, the flange is configured to accommodate a bearing by which the reduction member is supported.

According to an embodiment of the application, the flange is configured to accommodate a sealing member.

According to another aspect of the present application, there is provided a decelerator, wherein the decelerator comprises the decelerator housing as described above and a deceleration component disposed in an inner cavity of the decelerator housing.

According to a further aspect of the present application there is provided an electric drive assembly, wherein the electric drive assembly comprises an electric motor and a speed reducer as described above, wherein an output shaft of the electric motor is configured to drive an input shaft of the speed reducer.

According to the technical scheme of the application, by arranging the separate flange for the speed reducer shell, the speed reducer shell can be integrated with different types of motors by means of different flanges. Therefore, the integration with different types of motors can be conveniently realized without changing the main body structure of the speed reducer housing or redesigning the speed reducer housing, thereby improving the universality of the equipment. In addition, the installation direction of the speed reducing part in the speed reducer can be changed, so that the production and installation processes are simplified.

Drawings

Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, and it should be understood that the embodiments described below are only for the purpose of explaining the present application and not limiting the scope of the present application, wherein:

FIG. 1 schematically illustrates a partial cross-sectional view of an electric drive assembly according to an exemplary embodiment of the present application;

FIG. 2 schematically illustrates a perspective view of the reduction gear shown in FIG. 1;

fig. 3 schematically shows an enlarged view of the area a shown in fig. 1.

Detailed Description

Preferred embodiments of the present application are described in detail below with reference to examples. However, those skilled in the art will appreciate that these exemplary embodiments are not meant to be limiting in any way. Furthermore, features in embodiments of the present application may be combined with each other without conflict. In the drawings, other components are omitted for brevity, but this does not indicate that the reducer housing, reducer, and electric drive assembly of the present application may not include other components or modules.

Fig. 1 schematically illustrates a partial cross-sectional view of an electric drive assembly according to an exemplary embodiment of the present application, and fig. 2 schematically illustrates a perspective view of the reduction gear shown in fig. 1. As shown in fig. 1, the electric drive assembly 100 of the present application includes a reduction gear 10 and a motor 50 (schematically represented in fig. 1 by a dashed box), wherein an output shaft (not shown) of the motor 50 is configured to be coupled with an input shaft 11 of the reduction gear 10 to drive the input shaft 11 to rotate. As shown in fig. 1 and 2, the reduction gear 10 includes a reduction gear housing 20 and a reduction member 12 disposed in an inner cavity 21 of the reduction gear housing 20, wherein the reduction member 12 may include an input shaft 11, a plurality of gears 13, or a worm gear, worm, or the like. The speed reducer 10 generally contains lubricating oil therein for lubrication. In the example shown in fig. 1, the output of the speed reducer 10 is the differential 14, however the present application is not limited thereto. The output of the reducer 10 may also be a single output shaft.

It should be noted that the electric drive assembly 100 shown in fig. 1 is part of a powertrain of an electric vehicle, however, the present application is not limited thereto, and the electric drive assembly 100 may be part of any power apparatus requiring a reduction gear for a processing machine, a conveying machine, or the like. The output shaft of the motor 50 is configured to drive the input shaft 11 of the speed reducer 10 to reduce the rotation speed and increase the torque with the speed reducer 10.

As shown in fig. 1 and 2, the decelerator housing 20 includes a main body 22 and a flange 23. The main body 22 defines an inner cavity 21 for accommodating the reduction member 12, and one side (right side as viewed in fig. 1) of the main body 22 is provided with a mounting hole 24 so that the reduction member 12 can be mounted in the inner cavity 21 through the mounting hole 24. The flange 23 is configured to be detachably mounted to the main body 22, wherein the flange 23 is mounted on a side of the main body 22 where the mounting hole 24 is provided, and is configured to be fixedly connected with a housing of the motor 50 so that the input shaft 11 in the reduction member 12 and the output shaft of the motor 50 can be coupled to transmit power.

Thus, by providing a separate flange, the matching of the reduction gear with a different type of motor can be achieved by simply replacing the different flange 23 when the reduction gear 10 needs to be matched with a different type of motor 50, as compared to prior art reduction gears in electric drive assemblies. In addition, the flange 23 is mounted on the side of the decelerator housing 20 where the mounting hole 24 is provided, so that the mounting direction of the decelerator member 12 is changed, so that the mounting of the decelerator member 12 and the flange 23 can be completed in the same direction, thereby simplifying the production and mounting processes.

As shown in fig. 1 and 2, flange 23 is shown covering mounting hole 24 and allowing input shaft 11 to extend outwardly through flange 23. That is, the flange 23 serves to cover both the mounting hole 24 and the mounting motor 50, thereby saving the components of the reduction gear case 20. However, the present application is not limited thereto. For example, the reducer housing 20 may also include a cover plate (not shown) configured to cover the mounting hole 24 and allow the input shaft 11 to protrude outward through the cover plate. In this case, the cover plate covers the mounting hole 24, and the flange 23 is used as a separate component only for mounting the motor 50.

As shown in fig. 2 and 3, the flange 23 is provided with a plurality of holes 26 for receiving screws or bolts 25 so that the flange 23 is fixedly connected to the body 22 and the housing of the motor 50 by the screws or bolts 25. Thus, upon assembly of electric drive assembly 100, a fixed connection may be achieved by aligning the holes in the housing of motor 50 with holes 26 in flange 23, and then threading screws or bolts 25 into the corresponding holes. Preferably, a plurality of holes 26 in the flange 23 are provided around the mounting holes 24 to provide sufficient force in fixedly attaching the flange 23 to the body 22 by screws or bolts 25. It should be noted that in fig. 2, the screws or bolts and the holes for fixing the connection flange 23 and the main body 22 and the screws or bolts and the holes for fixing the connection flange 23 and the housing of the motor 50 are not denoted by different reference numerals, but this does not affect the understanding of the technical solution of the present application.

To facilitate installation and further ensure alignment of the axis of the input shaft 11 with the axis of the output shaft of the motor 50 and positioning of the flange 23 in the circumferential direction of the input shaft 11, a flange positioning portion (not shown) may be provided on the flange 23, a main body positioning portion (not shown) may be provided on the main body 22, and a motor positioning portion (not shown) may be provided on the housing of the motor 50, wherein the flange positioning portion matches the main body positioning portion and/or the motor positioning portion. For example, the flange positioning portion is one of a protrusion and a groove, and the body positioning portion and the motor positioning portion are the other of the protrusion and the groove. In this way, in the assembly process, the flange positioning part, the main body positioning part and the motor positioning part are abutted against each other so as to realize the relative positioning among the three parts.

In the case where the flange 23 is used to cover the mounting hole 24 and the housing to which the motor 50 is fixedly attached, the flange 23 may be configured to accommodate the bearing 27, with the reduction component 12 (e.g., the input shaft 11) being supported by the bearing 27. Depending on the configuration of the reduction member 12, a plurality of bearings may be provided. In addition, the flange 23 may also be configured to receive a sealing member 28 to prevent leakage of lubrication oil within the reducer housing 20 from between the flange 23 and the input shaft 11. For example, a recess for accommodating the bearing 27 and the seal member 28 is provided on the inner peripheral surface of the flange 23.

In addition, in the reduction gear 10 shown in fig. 1 and 2, the reduction gear housing 20 further includes a housing portion 29 for accommodating the differential gear 14, and the housing portion 29 is detachably mountable to the main body 22. The output shafts of both ends of the differential 14 may be coupled with, for example, two wheels of an electric vehicle, respectively, to drive the wheels in rotation. In addition, as previously described, the output of the speed reducer 10 may be a single output shaft instead of a differential to directly drive, for example, a single wheel.

The present application is described in detail above in connection with specific embodiments. However, the embodiments described above and shown in the drawings should be understood as illustrative and not limiting of the present application. It will be apparent to those skilled in the art that various modifications or adaptations can be made thereto without departing from the spirit of the present application.

Claims

1. A speed reducer housing (20), characterized in that the speed reducer housing (20) comprises:

-a body (22) defining an inner cavity (21) for accommodating a reduction member (12), one side of the body (22) being provided with a mounting hole (24) such that the reduction member (12) can be mounted in the inner cavity (21) through the mounting hole (24); and

a flange (23) configured to be removably mountable to the body (22),

wherein the flange (23) is mounted on the side of the main body (22) provided with the mounting hole (24) and is configured to be fixedly connectable with a housing of a motor (50) such that an input shaft (11) in the reduction member (12) can be driven by an output shaft of the motor (50).

2. The reducer housing (20) of claim 1, wherein the reducer housing (20) further comprises a cover plate configured to cover the mounting hole (24) and allow the input shaft (11) to protrude outward therethrough.

3. The reducer housing (20) of claim 1, wherein the flange (23) is configured to cover the mounting hole (24) and allow the input shaft (11) to protrude outward through the flange (23).

4. A reducer casing (20) according to any one of claims 1 to 3, characterized in that the flange (23) is provided with a plurality of holes (26) for receiving screws or bolts (25), so that the flange (23) is fixedly connected with the body (22) and the casing of the motor (50) by means of the screws or bolts (25).

5. A reducer casing (20) according to any one of claims 1 to 3, characterized in that the flange (23) is provided with a flange positioning portion that matches a main body positioning portion of the main body (22) and/or a motor positioning portion of a casing of the motor (50).

6. The reducer housing (20) of claim 5, wherein the flange positioning portion is one of a protrusion and a groove, and the body positioning portion and the motor positioning portion are the other of the protrusion and the groove.

7. A reducer casing (20) according to any one of claims 1 to 3, characterized in that the flange (23) is configured to house a bearing (27), the reducer member (12) being supported by the bearing (27).

8. A reducer casing (20) according to any one of claims 1 to 3, characterized in that the flange (23) is configured to house a sealing member (28).

9. A reducer (10), characterized in that the reducer (10) comprises a reducer housing (20) according to any one of claims 1-8 and a reduction member (12) arranged in an inner cavity (21) of the reducer housing (20).

10. An electric drive assembly (100), characterized in that the electric drive assembly (100) comprises an electric motor (50) and a reduction gear (10) according to claim 9, wherein an output shaft of the electric motor (50) is configured to drive an input shaft (11) of the reduction gear (10).