Dual-motor speed reduction shell for electric drive axle

Abstract

A dual-motor speed reduction shell for an electric drive axle comprises a speed reduction shell body, a connecting disc is integrally formed at the top of the speed reduction shell body, bearing mounting feet are integrally formed at the top of the connecting disc, and the speed reduction shell body comprises a main shaft mounting mechanism and a middle shaft mounting mechanism. The main shaft mounting mechanism and the intermediate shaft mounting structure which are arranged outside the speed reduction shell body can be compactly matched and mounted with a main shaft and an intermediate shaft, meanwhile, a cavity is provided in the speed reduction shell body for mounting the gear assembly for transmission, and sufficient space is provided by reasonable arrangement of the motor, the main shaft and the intermediate shaft; the power performance, the climbing performance, the maneuverability and the smoothness of the whole vehicle are obviously improved, high power and compact arrangement of the whole vehicle are achieved, meanwhile, the structure is simple, the high reduction ratio is achieved, the weight and the cost of the speed reducer are reduced, the structure of the speed reducer shell is simple, the error rate is reduced, quality control is facilitated, and the labor cost is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction housings, in particular to a dual-motor reduction housing for an electric drive axle. Background Art

[0002] In the electric drive axles currently available in China, the transmission gears of the reducers are mostly planetary gear trains or cylindrical gear structures. The reduction ratio of reducers with this structure is relatively low, and multiple sets of gears are required to cooperate to achieve a high reduction ratio, which increases the weight and cost of the reducer. Moreover, the reducers of domestic electric vehicles use single-motor reducers, which presents a problem in models that require the use of high-power motors: high-power motors are large in size and require a large amount of vehicle chassis space. However, some models do not have enough chassis space to accommodate high-power motors. As a result, the motors cannot be arranged or the design is enlarged to force a match, making it impossible to achieve both high power and compact vehicle layout, which is a constraint on the development of electric vehicles. Domestic electric drive axles for automobiles also mostly adopt a single-motor structure, which has a low output torque and cannot meet the requirements of the vehicle's power performance.

[0003] Therefore, in view of the shortcomings of the existing technology, it is necessary to provide a dual-motor reduction housing for an electric drive axle to solve the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of the present invention is to avoid the deficiencies of the prior art and provide a dual-motor reduction housing for an electric drive axle. The main shaft mounting mechanism and the intermediate shaft mounting structure arranged on the outside of the reduction housing body can be compactly installed in conjunction with the main shaft and the intermediate shaft. At the same time, a cavity is provided inside the reduction housing body to install the gear assembly for transmission. The reasonable arrangement of the motor, main shaft and intermediate shaft provides sufficient space, and the power, climbing performance, maneuverability and smoothness of the whole vehicle are significantly improved, achieving both high power and compact arrangement of the whole vehicle. At the same time, the structure is simple, a high reduction ratio is achieved, and the weight and cost of the reducer are reduced. The structure of the reducer housing is simple, the error rate is reduced, and quality control and inspection labor costs are convenient.

[0005] The above-mentioned purpose of the present invention is achieved through the following technical means.

[0006] Provided is a dual-motor reduction housing for an electric drive axle, comprising a reduction housing body, a connection plate integrally formed on the top of the reduction housing body, a bearing mounting foot integrally formed on the top of the connection plate, and the reduction housing body comprising a main shaft mounting mechanism and an intermediate shaft mounting mechanism;

[0007] The spindle mounting mechanism includes a spindle mounting groove, a spindle mounting hole is provided at the bottom of the spindle mounting groove, a spindle partition mounting groove is provided outside the spindle mounting hole, a spindle gasket mounting groove is provided outside the spindle partition mounting groove, a spindle end cover mounting surface is provided outside the spindle mounting groove, and a bolt mounting hole is provided on the spindle end cover mounting surface;

[0008] Specifically, the intermediate shaft mounting mechanism includes an intermediate shaft mounting hole, an adjusting gasket mounting surface is provided outside the intermediate shaft mounting hole, a locking end cover mounting surface is provided outside the adjusting gasket mounting surface, and a bolt mounting hole is also provided on the locking end cover mounting surface.

[0009] Specifically, a wheel side pressure switch is provided on the connection portion between the connecting disc and the reduction housing body, and an air pipe interface is installed on the wheel side pressure switch.

[0010] Specifically, a through opening is opened on the top of the reduction housing body, a sealing copper gasket is installed on the through opening, and a screw plug is installed inside the through opening.

[0011] Specifically, a cavity is provided inside the reduction housing body, and a gear assembly is installed inside the cavity.

[0012] The utility model can compactly cooperate with the main shaft and the intermediate shaft by arranging the main shaft mounting mechanism and the intermediate shaft mounting structure on the outside of the reduction housing body, and at the same time provide a cavity for mounting the gear assembly inside the reduction housing body for transmission. The reasonable arrangement of the motor, main shaft and intermediate shaft provides sufficient space, and the power, climbing performance, maneuverability and smoothness of the whole vehicle are significantly improved, achieving both high power and compact arrangement of the whole vehicle. At the same time, the structure is simple, a high reduction ratio is achieved, and the weight and cost of the reducer are reduced. The structure of the reducer housing is simple, the error rate is reduced, and quality control and inspection labor costs are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0014] Figure 1 It is a structural schematic diagram of the front side of a dual-motor reduction housing for an electric drive axle of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the back side of a dual-motor reduction housing for an electric drive axle of the present invention.

[0016] Figure 3 It is a three-dimensional diagram of a dual-motor reduction housing for an electric drive axle of the present utility model.

[0017] from Figures 1 to 3 Including:

[0018] 1. Reducer housing body;

[0019] 2. Connecting plate;

[0020] 3. Bearing mounting foot;

[0021] 4. Spindle installation mechanism;

[0022] 5. Intermediate shaft installation mechanism;

[0023] 6. Spindle mounting slot;

[0024] 7. Spindle mounting hole;

[0025] 8. Spindle partition installation slot;

[0026] 9. Spindle gasket installation slot;

[0027] 10. Bolt mounting holes;

[0028] 11. Spindle end cover mounting surface;

[0029] 12. Intermediate shaft mounting hole;

[0030] 13. Adjust the gasket installation surface;

[0031] 14. Lock the end cover mounting surface;

[0032] 15. Wheel side pressure switch;

[0033] 16. Tracheal interface;

[0034] 17. Tongkou;

[0035] 18. Sealing copper gasket;

[0036] 19. Cavity. DETAILED DESCRIPTION

[0037] The present invention will be further described with reference to the following embodiments.

[0038] Example 1:

[0039] like Figure 1-3 As shown, a dual-motor reduction housing for an electric drive axle includes a reduction housing body 1, a connecting plate 2 is integrally formed on the top of the reduction housing body 1, a bearing mounting foot 3 is integrally formed on the top of the connecting plate 2, and the reduction housing body 1 includes a main shaft mounting mechanism 4 and an intermediate shaft mounting mechanism 5.

[0040] The connecting plate 2 and the bearing mounting foot 3 installed on the reduction housing body 1 can be used to add left and right sets of bearing covers during installation. At the same time, bolt holes are provided on the connecting plate 2 during installation, which can be fixedly connected by external mounting bolts. The main shaft mounting mechanism 4 provided on the reduction housing body 1 can fit tightly with the main shaft when the main shaft is installed through, providing sufficient space distribution. The setting of the intermediate shaft mounting mechanism 5 can be installed in coordination with the intermediate shaft. After the intermediate shaft is installed, the structure of the intermediate shaft mounting mechanism 5 is simple, which achieves both high power and compact layout of the vehicle, and can reduce the weight and production cost of the reducer body.

[0041] The spindle mounting mechanism 4 includes a spindle mounting groove 6, a spindle mounting hole 7 is provided at the bottom of the spindle mounting groove 6, a spindle partition mounting groove 8 is provided outside the spindle mounting hole 7, a spindle gasket mounting groove 9 is provided outside the spindle partition mounting groove 8, a spindle end cover mounting surface 11 is provided outside the spindle mounting groove 6, and a bolt mounting hole 10 is provided on the spindle end cover mounting surface 11.

[0042] The mounting hole provided in the spindle mounting groove 6 can allow the spindle to pass through while ensuring the rotation efficiency of the spindle. In the prior art, a spindle partition is installed on the spindle. The spindle partition mounting groove 8 provided in the present application can provide a movable installation space for the spindle partition. At the same time, the spindle partition mounting groove 8 and the spindle gasket mounting groove 9 are opened in a stepped shape. During assembly, the spindle gasket is set in the spindle gasket mounting groove 9 to achieve a compact fit to ensure utilization efficiency. The bolt mounting hole 10 opened on the spindle end cover mounting surface 11 provided on the top of the spindle mounting groove 6 can facilitate the sealing connection of the spindle mounting cover, and is fixed with bolts.

[0043] The intermediate shaft mounting mechanism 5 includes an intermediate shaft mounting hole 12, an adjusting gasket mounting surface 13 is provided on the outside of the intermediate shaft mounting hole 12, a locking end cover mounting surface 14 is provided on the outside of the adjusting gasket mounting surface 13, and a bolt mounting hole 10 is also provided on the locking end cover mounting surface 14. During the installation of the intermediate shaft, the intermediate shaft mounting hole 12 can be passed through for installation by the intermediate shaft, and the adjusting gasket installed on the intermediate shaft can be installed into the adjusting gasket mounting surface 13 to ensure the tightness and smoothness of the intermediate shaft and the adjusting gasket. The locking end covers arranged on both sides of the intermediate shaft can be quickly threaded onto the locking end cover mounting surface 14 to ensure tight installation during the transmission process of the intermediate shaft.

[0044] A wheel-side pressure switch 15 is provided on the connecting part between the connecting disc 2 and the reduction housing body 1. An air pipe interface 16 is installed on the wheel-side pressure switch 15. The air pipe interface 16 can be bolted to the wheel-side pressure switch 15 to facilitate pressure transmission between the external air pipe and the wheel-side pressure switch 15.

[0045] A through opening 17 is provided on the top of the reduction housing body 1, a sealing copper gasket 18 is installed on the through opening 17, and a screw plug is installed inside the through opening 17. The position of the through opening 17 corresponds to the top of the intermediate shaft mounting mechanism 5. The screw plug and the sealing copper gasket 18 are arranged to control the communication between the intermediate shaft mounting mechanism 5 and the outside of the reducer housing.

[0046] A cavity 19 is provided inside the reduction housing body 1, and a gear assembly is installed inside the cavity 19. The cavity 19 is provided to provide sufficient space for the gear assembly used in the transmission process of the main shaft and the intermediate shaft, while ensuring that the internal structure of the cavity 19 is stable and compact.

[0047] During the production process, the main shaft mounting mechanism 4 and the intermediate shaft mounting structure arranged on the outside of the reduction housing body can be compactly installed with the main shaft and the intermediate shaft. At the same time, a cavity 19 is provided inside the reduction housing body to install the gear assembly for transmission. The reasonable arrangement of the motor, main shaft and intermediate shaft provides sufficient space, and the vehicle's power, climbing performance, maneuverability and smoothness are significantly improved, achieving both high power and compact vehicle arrangement. At the same time, the structure is simple, a high reduction ratio is achieved, and the weight and cost of the reducer are reduced. The structure of the reducer housing is simple, the error rate is reduced, and quality control and inspection labor costs are convenient.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A dual-motor reduction housing for an electric drive axle, characterized by: It includes a reduction housing body, a connection plate integrally formed on the top of the reduction housing body, a bearing mounting foot integrally formed on the top of the connection plate, and the reduction housing body includes a main shaft mounting mechanism and an intermediate shaft mounting mechanism; The spindle mounting mechanism includes a spindle mounting groove, a spindle mounting hole is provided at the bottom of the spindle mounting groove, a spindle partition plate mounting groove is provided outside the spindle mounting hole, a spindle gasket mounting groove is provided outside the spindle mounting groove, a spindle end cover mounting surface is provided outside the spindle mounting groove, and a bolt mounting hole is provided on the spindle end cover mounting surface; The intermediate shaft mounting mechanism includes an intermediate shaft mounting hole, an adjusting gasket mounting surface is provided outside the intermediate shaft mounting hole, a locking end cover mounting surface is provided outside the adjusting gasket mounting surface, and the locking end cover mounting surface is also provided with the bolt mounting hole.

2. The dual-motor reduction housing for an electric drive axle according to claim 1, characterized in that: A wheel side pressure switch is provided on the connection portion between the connecting plate and the reduction housing body, and an air pipe interface is installed on the wheel side pressure switch.

3. The dual-motor reduction housing for an electric drive axle according to claim 2, characterized in that: A through opening is provided on the top of the reduction housing body, a sealing copper gasket is installed on the through opening, and a screw plug is installed inside the through opening.

4. The dual-motor reduction housing for an electric drive axle according to claim 3, characterized in that: A cavity is provided inside the reduction housing body, and a gear assembly is installed inside the cavity.

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