CN221162027U - Dual-motor electric drive bridge assembly - Google Patents

Abstract

The utility model relates to a double-motor electric drive axle assembly, which comprises an axle housing, a gearbox housing assembly and a fixing piece, wherein the axle housing is provided with a gear box assembly; the axle housing is provided with a through installation channel, the installation channel is perpendicular to the axial direction of the axle housing, and two end surfaces of the installation channel are provided with a first end surface and a second end surface which are arranged in parallel; the gearbox housing assembly comprises a first housing part, a second housing part and an end cover; the first shell part and the second shell part are oppositely arranged and are in butt joint and fixed, and the first shell part and the second shell part are connected and then pass through the installation channel; the first shell part is provided with a first sealing surface towards one side of the first end face, the first sealing surface is in butt joint with the first end face and matched with the first end face, the second shell part is provided with a second sealing surface in the same direction with the second end face, the second sealing surface is in the same plane with the second end face, and the end cover covers the second sealing surface and the second end face and is fixedly connected through a fixing piece. Compared with the prior art, the double-sealing-surface positioning device can simultaneously give consideration to the strength, the sealing performance and the dimensional accuracy of the shell, and solves the problem that the double sealing surfaces cannot simultaneously ensure the positioning accuracy.

Description

Dual-motor electric drive bridge assembly

Technical Field

The utility model relates to the technical field of vehicle power systems, in particular to a double-motor electric drive axle assembly.

Background

The electric drive Axle (ELECTRIC DRIVE Axle) is a drive Axle integrated with key components such as a motor, a speed reducer and the like. In new energy vehicles, in particular electric vehicles, an electrically driven bridge is a very critical component responsible for converting the power generated by an electric motor into torque suitable for the wheel speed through a reduction gear and for driving the wheels in rotation.

The axle housing is used for mounting the main speed reducer, the differential mechanism, the half axle and the wheel assembly matrix and mainly used for supporting and protecting the main speed reducer, the differential mechanism, the half axle and the like. In general, a common non-disconnected drive axle housing is a rigid hollow beam supported on left and right drive wheels, in which drive members such as a final drive, a differential, and a half axle are all housed, and the axle housing is connected to a vehicle frame or a vehicle cabin via a longitudinal leaf spring. In the design of an electrically driven bridge, the layout and the design of the axle housing are key technical considerations.

At present, most of electric drive bridges for heavy commercial vehicles adopt a three-section type axle housing and an integral type axle housing, wherein the integral type axle housing has strong bearing capacity and good sealing effect, and becomes a main flow structural form of the electric drive bridge for household appliances in various factories.

The single-motor integral axle housing electric drive axle motor can only be arranged on one side to cause the bias of the gravity center of the electric drive axle, and the double-motor integral axle housing electric drive axle has better stress condition because the two motors can be symmetrically arranged along the transmission shaft, and the gravity center of the electric drive axle can be basically coincident with the center line of the transmission shaft.

In some schemes of the existing double-motor electric drive bridge assembly, two motors are respectively connected to the axle housing of the electric drive bridge through a left half housing and a right half housing, but the size precision and the assembly precision of the left half housing, the right half housing and the axle housing can directly influence the meshing precision of gears, the electric drive bridge under the structure often generates larger noise, and the strength of the housing is difficult to guarantee.

Disclosure of utility model

The utility model discloses a double-motor electric drive bridge assembly, and aims to solve the technical problems in the prior art.

The utility model adopts the following technical scheme:

The embodiment of the utility model provides a double-motor electric drive axle assembly, which comprises an axle housing, a gearbox housing assembly and a fixing piece;

The axle housing is provided with a through installation channel, and the two ends of the installation channel are provided with a first end face and a second end face which are parallel to each other;

The gearbox housing assembly comprises a first housing part, a second housing part and an end cover; the first shell part and the second shell part are oppositely arranged and are in butt joint and fixed, and the first shell part and the second shell part are connected and then pass through the installation channel; the first shell part is provided with a first sealing surface towards one side of the first end face, the first sealing surface is in butt joint with the first end face and matched with the first end face, the second shell part is provided with a second sealing surface in the same direction with the second end face, the second sealing surface is in the same plane with the second end face, and the end cover covers the second sealing surface and the second end face and is fixedly connected through a fixing piece.

As the preferable technical scheme, the gearbox housing assembly further comprises a first connecting piece, a plurality of first mounting grooves are formed in one end, facing the second housing, of the first housing, a second mounting groove is formed in the second housing, the second mounting groove is communicated with the first mounting groove, and the first connecting piece penetrates through the second mounting groove and is arranged in the first mounting groove.

As the preferable technical scheme, the first mounting groove and the second mounting groove are both thread grooves, the first connecting piece comprises a plurality of long bolts, and the end part of the first connecting piece is abutted with the second shell part.

As the preferable technical scheme, the gearbox housing assembly further comprises a second connecting piece, the first sealing surface is provided with a plurality of through third mounting grooves, the first end surface is provided with a plurality of fourth mounting grooves, and the second connecting piece penetrates through the third mounting grooves and is fixed in the fourth mounting grooves.

As the preferable technical scheme, the third mounting groove and the fourth mounting groove are screw grooves, the second connecting piece comprises a plurality of short bolts, and the end part of the second connecting piece is abutted with the first shell part.

As a preferable technical scheme, sealing elements are arranged between the first end face and the first sealing face and between the second end face and the second sealing face.

As a preferred technical solution, the sealing member comprises one or more of a sealing ring, a sealing gasket and a sealing glue.

As the preferable technical scheme, the fixing piece comprises a plurality of bolts, bolt holes matched with the fixing piece are formed in the end cover, the second sealing surface and the second end face, the fixing piece penetrates through the end cover to be fixed in the bolt holes, and the end part of the fixing piece is abutted against the end cover.

As the preferable technical scheme, the inner side of the installation channel is provided with a first matching surface, the joint of the first shell part and the second shell part is provided with a second matching surface, and the second matching surface is matched with the first matching surface.

As a preferable technical scheme, the double-motor electric drive axle assembly further comprises a speed reducing mechanism, a differential mechanism, a gear shifting mechanism, a brake assembly and two driving motors.

One embodiment of the above utility model has the following advantages or benefits:

Compared with the prior art, the embodiment of the utility model changes the connection mode of the gearbox shell and the axle housing into a drawing type design, improves the precision of the existing structure, can simultaneously consider the shell strength, the sealing performance and the dimensional precision, improves the noise problem of the symmetrically arranged electric drive axle of the double motors and the shell precision, obviously improves the diversity of connection modes of the reducer shell and the axle housing, and solves the problem that the double sealing surfaces cannot simultaneously ensure the positioning precision.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments are briefly described below to form a part of the present utility model, and the exemplary embodiments of the present utility model and the description thereof illustrate the present utility model and do not constitute undue limitations of the present utility model. In the drawings:

FIG. 1 is a schematic diagram of a dual electro-mechanical drive axle assembly according to one embodiment of the present utility model;

FIG. 2 is an exploded view of a dual motor electric drive axle assembly according to one embodiment of the present utility model;

Fig. 3-6 are process step diagrams of a housing portion of a dual motor electric drive axle assembly according to one embodiment of the present utility model.

Reference numerals illustrate:

Axle housing 10, mounting channel 11, first end face 12, second end face 13, transmission housing assembly 20, first housing portion 21, first sealing surface 211, first mounting groove 212, bearing hole 213, pin hole 214, third mounting groove 215, second housing portion 22, second sealing surface 221, second mounting groove 222, end cap 23, first connector 24, second connector 25, and mount 30.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. In the description of the present utility model, it should be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

In the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In one embodiment of the present utility model, the housing part of the dual-motor electric drive axle assembly includes an axle housing 10, a gearbox housing assembly 20 and a fixing member 30, and the power part of the dual-motor electric drive axle assembly includes a speed reducing mechanism, a differential mechanism, a gear shifting mechanism, a brake assembly, a shaft head and two driving motors.

In a preferred embodiment, the two drive motors, the reduction mechanism, the differential mechanism, the gear shifting mechanism are all enclosed in a housing portion, the reduction mechanism comprising a planetary gear set; shaft heads, brake assemblies and other accessories are disposed at the axial ends of the housing portion, the shaft heads being adapted to output power to the hub.

Referring to fig. 1 and 2, in a preferred embodiment, the housing portion of the dual motor electric drive axle assembly includes an axle housing 10, a transmission housing assembly 20, and a mount 30.

Preferably, the axle housing 10 is connected with a shaft head, a brake assembly and other accessories at two axial ends, the middle part of the axle housing 10 is provided with a through installation channel 11, the through direction of the installation channel 11 is perpendicular to the axial direction of the axle housing 10, two ends of the installation channel 11 are provided with a first end face 12 and a second end face 13, the first end face 12 and the second end face 13 are in a rectangular ring shape and are arranged in parallel, and are parallel to the axial direction of the axle housing 10, and the circumferential inner side surface of the installation channel 11 is a first matching surface.

Preferably, the transmission housing assembly 20 includes a first housing portion 21, a second housing portion 22 and an end cover 23, wherein a driving motor is respectively installed in the first housing portion 21 and the second housing portion 22, the first housing portion 21 and the second housing portion 22 are oppositely arranged and are in butt joint and fixed, a speed reducing mechanism, a differential mechanism, a gear shifting mechanism and the like are arranged between the first housing portion 21 and the second housing portion 22, a second matching surface is arranged on the outer side of the periphery of the joint of the first housing portion 21 and the second housing portion 22, the second matching surface is arranged in the installation channel 11 in a pulling mode after the first housing portion 21 and the second housing portion are connected, the second housing is matched with the first matching surface, and the second housing can be fixedly connected with the axle housing 10 through the end cover 23 and the fixing piece 30.

Specifically, the first housing portion 21 is provided with a first sealing surface 211 on a side facing the first end surface 12, the first sealing surface 211 is arranged in parallel with the first end surface 12 and has a uniform shape, and when the first housing portion 21 is connected with the second housing portion 22 and pushed into the mounting channel 11, the first sealing surface 211 and the first end surface 12 are abutted against each other; the second housing part 22 is provided with a second sealing surface 221 which is in the same direction as the second end surface 13, when the first housing part 21 is connected with the second housing part 22 and pushed into the mounting channel 11, the second sealing surface 221 is coplanar with the second end surface 13, the shape of the end cover 23 is matched with the shapes of the second sealing surface 221 and the second end surface 13, the end cover 23 is in a substantially rectangular ring shape, and the end cover 23 can be covered on the second sealing surface 221 and the second end surface 13 in parallel and is connected and fixed through the fixing piece 30.

In a preferred embodiment, seals are provided between the first end face 12 and the first sealing face 211, and between the second end face 13 and the second sealing face 221, and the seals may be one or more combinations of a gasket, and a sealant.

In a preferred embodiment, the transmission housing assembly 20 further includes a first connecting member 24 and a second connecting member 25, the first housing portion 21 has a plurality of first mounting slots 212 formed toward one end of the second housing portion 22, the second housing portion 22 has a plurality of second mounting slots 222, the second mounting slots 222 are in one-to-one correspondence with the first mounting slots 212, and each second mounting slot 222 is in communication with an adjacent first mounting slot 212, and the first connecting member 24 is fixed in the first mounting slot 212 through the second mounting slot 222; the first sealing surface 211 is provided with a plurality of through third mounting grooves 215, the first end surface 12 is provided with a plurality of fourth mounting grooves (not shown in the figure), the fourth mounting grooves are matched with the third mounting grooves 215 one by one, each fourth mounting groove is communicated with the adjacent third mounting groove 215, and the second connecting piece 25 is fixed in the fourth mounting groove through the third mounting groove 215.

Specifically, the first mounting groove 212 and the second mounting groove 222 are both threaded grooves, the first connecting member 24 is configured as a plurality of long bolts, and after the first connecting member 24 penetrates into the second mounting groove 222 and the first mounting groove 212, the end portions thereof abut against the second housing portion 22.

Specifically, the third mounting groove 215 and the fourth mounting groove are both screw grooves, the second connecting member 25 is configured as a plurality of short bolts, and after the second connecting member 25 is inserted into the third mounting groove 215 and the fourth mounting groove, the end portions thereof abut against the first housing portion 21.

In a preferred embodiment, the first end face 12 and the first sealing face 211 are further provided with a plurality of communicating pin bores 214 for receiving pins for positioning.

Preferably, the fixing member 30 includes a plurality of bolts, bolt holes matched with the fixing member 30 are formed on the end cover 23, the second sealing surface 221 and the second end surface 13, the fixing member 30 is fixed in the bolt holes through the end cover 23, and the end part of the fixing member 30 is abutted against the end cover 23.

Referring to fig. 3 to 6, in one embodiment of the present utility model, there is further provided a method for processing a housing portion of the above-mentioned dual motor electric drive axle assembly, the method comprising the steps of:

The first housing portion 21 and the second housing portion 22 are cast separately, both of which are metal housings, and leave a sufficient machining allowance, and the method of determining the machining allowance may be selected from any of the embodiments disclosed in the prior art, and is not particularly limited herein;

The bearing holes 213, the first mounting groove 212 and the second mounting groove 222 of the first housing part 21 and the second housing part 22 are respectively processed, and then the first housing part 21 and the second housing part 22 are connected and fixed through the first connecting piece 24 to form the transmission housing assembly 20, as shown in fig. 3;

machining a bearing hole 213, machining a first sealing surface 211 and a second sealing surface 221 respectively based on the bearing hole 213, and machining a third mounting groove 215, a fourth mounting groove and a pin hole 214 as shown in fig. 4;

Pushing the transmission housing assembly 20 into the mounting channel 11 of the axle housing 10, radially positioning by using pins, screwing up the second connecting piece 25, and then machining the second end surface 13 and the second sealing surface 221 to ensure the flatness of the two, and machining bolt holes at the same time, as shown in fig. 5;

The end cover 23 is simultaneously connected to the second end surface 13 and the second sealing surface 221 by the fixing member 30, so that the assembly of the transmission housing assembly 20 and the axle housing 10 is completed, as shown in fig. 6, specifically, sealing members are respectively arranged between the first end surface 12 and the first sealing surface 211 and between the second end surface 13 and the second sealing surface 221, and one or more combinations of sealing rings, gaskets and sealing glue can be selected from the sealing members.

Compared with the prior art, the embodiment of the utility model changes the connection mode of the gearbox housing assembly 20 and the axle housing 10 into a drawing type design, improves the precision of the existing structure, can simultaneously give consideration to the strength, the sealing performance and the dimensional precision of the housing, improves the noise problem and the housing precision of the electric drive bridge with symmetrical arrangement of double motors, obviously improves the diversity of the connection modes of the reducer housing and the axle housing 10, and solves the problem that the double sealing surfaces cannot simultaneously ensure the positioning precision.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in order to streamline the utility model and aid in understanding one or more of the various inventive aspects, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the utility model. However, the method of the present utility model should not be construed as reflecting the following intent: i.e., the claimed utility model requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this utility model.

It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Claims (10)

1. The double-motor electric drive axle assembly is characterized by comprising an axle housing, a gearbox housing assembly and a fixing piece;

The axle housing is provided with a through installation channel, and two ends of the installation channel are provided with a first end face and a second end face which are parallel to each other;

The gearbox housing assembly includes a first housing portion, a second housing portion, and an end cap; the first shell part and the second shell part are oppositely arranged and are in abutting connection and fixed, and the first shell part and the second shell part are connected and then pass through the mounting channel; the first shell part is provided with a first sealing surface towards one side of the first end face, the first sealing surface is matched with the first end face in a butt joint mode, the second shell part is provided with a second sealing surface which is in the same direction with the second end face, the second sealing surface is coplanar with the second end face, and the end cover covers the second sealing surface and the second end face and is fixedly connected through the fixing piece.

2. The dual motor electric drive axle assembly of claim 1, wherein the transmission housing assembly further includes a first connector, a plurality of first mounting slots are provided in the first housing portion toward one end of the second housing portion, a second mounting slot is provided in the second housing portion, the second mounting slot communicates with the first mounting slot, and the first connector is disposed in the first mounting slot through the second mounting slot.

3. The dual motor electric drive axle assembly of claim 2, wherein the first mounting groove and the second mounting groove are both threaded grooves, the first connecting member includes a plurality of long bolts, and an end of the first connecting member abuts against the second housing portion.

4. The dual motor electric drive axle assembly of claim 1, wherein the transmission housing assembly further includes a second connector, the first sealing surface is provided with a plurality of third mounting slots therethrough, the first end surface is provided with a plurality of fourth mounting slots, and the second connector is secured in the fourth mounting slots through the third mounting slots.

5. The dual electro-mechanical drive axle assembly of claim 4, wherein the third mounting groove and the fourth mounting groove are both threaded grooves, the second connector includes a plurality of short bolts, and an end of the second connector abuts the first housing portion.

6. The dual motor electric drive bridge assembly of claim 1, wherein seals are provided between the first end face and the first sealing face and between the second end face and the second sealing face.

7. The dual motor electric drive axle assembly of claim 6, wherein the seal comprises one or more of a gasket, a seal, and a sealant.

8. The dual motor electrically driven bridge assembly of claim 1, wherein the securing member comprises a plurality of bolts, bolt holes matching the securing member are formed in the end cover, the second sealing surface and the second end surface, the securing member passes through the end cover and is secured in the bolt holes, and an end of the securing member abuts against the end cover.

9. The dual motor electric drive axle assembly of claim 1, wherein a first mating surface is provided on an inner side of the mounting channel, a second mating surface is provided at a junction of the first housing portion and the second housing portion, and the second mating surface is matched with the first mating surface.

10. The dual motor electric drive axle assembly of any one of claims 1-9, further comprising a reduction mechanism, a differential mechanism, a gear shift mechanism, a brake assembly, and two drive motors.