Main shell compatible with disconnected differential mechanism and differential lock, electric drive assembly and vehicle

Abstract

The invention discloses a main shell compatible with a disconnected differential mechanism and a differential lock, an electric drive assembly and a vehicle, the main shell comprises a main shell body, and the main shell body is provided with a first hole used for being connected with an output shaft of the disconnected differential mechanism or the differential lock; the radial outer side of the first hole is provided with at least one first limiting feature used for limiting the disconnected differential mechanism in the circumferential direction, at least one second limiting feature used for limiting the differential lock in the circumferential direction and a plurality of pre-cast holes formed in the circumferential direction at intervals. The projection shape of the pre-casting hole in a datum plane perpendicular to the central axis of the first hole is located in the projection shape of the first limiting feature and the projection shape of the second limiting feature in the datum plane perpendicular to the central axis of the first hole. The differential mechanism can be compatible with a disconnected differential mechanism and a differential lock at the same time, and has the advantages of being simple in structure and convenient to assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive assemblies, and specifically discloses a main housing, an electric drive assembly and a vehicle that are compatible with a disconnect differential and a differential lock. Background Art

[0002] With the increasing attention paid to carbon neutrality and environmental protection around the world, the new energy vehicle market has developed rapidly. As an important branch of it, new energy off-road vehicles have also ushered in rapid growth. However, the design of the main housing of off-road vehicles on the market currently has many limitations, mainly reflected in the low degree of structural standardization and poor functional adaptability. From the perspective of structural standardization, the internal structural dimensions and installation interfaces of the existing main housing are often customized for specific models of differentials and lack versatility. When it is necessary to replace a differential of a different type or specification, the main housing cannot be directly compatible and needs to be redesigned and manufactured, which greatly increases the production cost and development cycle.

[0003] In terms of functional adaptability, the main housing has several technical difficulties. First, the internal layout of the main housing is compact, and the reserved differential and differential lock installation space is limited, which makes it difficult to flexibly adjust to accommodate components of different sizes and structures. In particular, when a differential lock needs to be installed, it is often impossible to do so due to insufficient space. Secondly, the sealing design of the existing main housing usually only considers the needs of a single type of differential. When different types of differentials are replaced, the original sealing structure may not be able to guarantee a good sealing effect, which can easily lead to problems such as oil leakage.

[0004] In addition, different types of differentials have different heat dissipation requirements, and the existing main housing cooling channel design lacks flexibility, making it difficult to meet the heat dissipation requirements of various differentials, affecting overall performance. At the same time, the lubrication oil channel design inside the main housing is usually based on a specific differential model. After replacing the differential, there may be problems with insufficient lubrication or excessive lubrication, affecting the service life of the components. These technical limitations severely restrict the diversification of the configuration of the electric drive assembly, making it difficult to meet the market's diverse needs for off-road performance.

[0005] In summary, the design of the main housing of off-road vehicles currently on the market has obvious limitations and cannot be flexibly adapted to different types of differentials and differential locks. This incompatibility seriously restricts the diversification of the configuration of the electric drive assembly and makes it difficult to meet the market's diverse needs for off-road performance. Therefore, it is urgent to develop a main housing that is compatible with disconnectable differentials and differential locks to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a main housing, an electric drive assembly and a vehicle that are compatible with a disconnect differential and a differential lock. The electric drive housing is reasonably designed to be compatible with both disconnect differential and differential lock differential configurations, and has the advantages of simple structure and easy assembly.

[0007] To achieve the above-mentioned objectives, the present invention discloses a main housing compatible with a disconnect differential and a differential lock, including a main housing, the main housing being provided with a first hole for connecting the output shaft of the disconnect differential or the differential lock, the radial outer side of the first hole being provided with at least one first limiting feature for circumferentially limiting the disconnect differential, at least one second limiting feature for circumferentially limiting the differential lock, and a plurality of precast holes arranged at intervals along the circumference, the projection shape of the precast holes in a reference plane perpendicular to the central axis of the first hole being located within the projection shapes of the first limiting feature and the second limiting feature in the reference plane perpendicular to the central axis of the first hole.

[0008] In a preferred embodiment of the present invention, there is an angle between a line connecting the center of the first limiting feature and the center of the first hole and a line connecting the center of the second limiting feature and the center of the first hole.

[0009] In a preferred embodiment of the present invention, the length of a line connecting the center of the first limiting feature and the center of the first hole corresponds to the length of a line connecting the center of the precast hole and the center of the first hole.

[0010] In a preferred embodiment of the present invention, the length of a line connecting the center of the second limiting feature and the center of the first hole corresponds to the length of a line connecting the center of the precast hole and the center of the first hole.

[0011] In a preferred embodiment of the present invention, the cross-sectional shape of the first limiting feature is different from the cross-sectional shape of the second limiting feature.

[0012] In a preferred embodiment of the present invention, a sensor mounting hole for mounting a position sensor is provided on the main housing.

[0013] In a preferred embodiment of the present invention, the main housing is provided with an electromagnetic coil mounting hole for mounting the electromagnetic coil.

[0014] The present invention also discloses an electric drive assembly compatible with a disconnect differential and a differential lock, comprising a disconnect differential or a differential lock, wherein the disconnect differential or the differential lock is mounted on a main housing.

[0015] In a preferred embodiment of the present invention, the disconnect differential or the differential lock is provided with a positioning feature for cooperating with the first limiting feature or the limiting feature.

[0016] The present invention also discloses a vehicle, comprising an electric drive assembly compatible with a disconnect differential and a differential lock.

[0017] The beneficial effects of the present invention are as follows: the present invention has the advantages of simple structure and convenient assembly, and through reasonable design of the electric drive housing, it can be compatible with both disconnect differential and differential lock differential configurations, thereby effectively reducing the cost of the electric drive assembly.

[0018] First, the present invention realizes flexible compatibility with disconnect differentials and differential locks by providing a first hole and a first circumferential limiting feature, a second limiting feature and a precast hole on the main housing. This design enables the same main housing to be installed with different types of differential devices as needed, significantly improving the versatility and adaptability of the main housing.

[0019] Secondly, by designing the specific angle relationship between the first limiting feature and the second limiting feature, and the positional correspondence between them and the precast hole, the present invention ensures the accurate positioning and reliable installation of the differential and the differential lock. This structural design not only simplifies the assembly process, but also improves the assembly accuracy and operational reliability.

[0020] Furthermore, the present invention effectively prevents assembly errors and improves assembly error prevention performance by differentially designing the cross-sectional shapes of the first limiting feature and the second limiting feature. At the same time, the main housing integrates the position sensor mounting hole and the electromagnetic coil mounting hole, providing a convenient installation interface for the intelligent control and performance monitoring of the system.

[0021] Finally, the design of the present invention can be directly applied to electric drive assemblies and vehicle systems, and has good engineering practice value. By setting corresponding positioning features on the disconnect differential or differential lock, accurate matching with the main housing is ensured, further improving the overall assembly efficiency and reliability. This design not only reduces production costs, but also improves the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of the electric drive assembly in the patent of this invention;

[0023] Figure 2 It is a top view of the main housing in the patent of the present invention;

[0024] Figure 3 Exploded view of the differential and differential bearing of the present invention

[0025] In the figure: 1-main housing, 1.1-first hole, 1.2-first limiting feature, 1.3-second limiting feature, 1.4-precast hole, 1.5-position sensor mounting hole, 1.6-electromagnetic coil mounting hole, 2-differential bearing, 2.1-differential bearing outer ring, 2.2-differential bearing inner ring, 3-disconnecting differential / differential lock, 3.1-output shaft, 3.2-limit finger, 4-position sensor, 5-electromagnetic coil. DETAILED DESCRIPTION

[0026] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1 to 3 As shown, the main housing 1 provided in this embodiment is a die-cast aluminum alloy part, and its greatest technical feature is that it can be flexibly compatible with the assembly of a disconnect differential / differential lock 3, that is, the same main housing 1 can be adapted to install a disconnect differential or a differential lock. The overall structural design of the main housing 1 is developed around improving versatility and assembly reliability, and mainly includes the following key parts:

[0029] First, the main housing 1 is provided with a first hole 1.1, which is a precision-machined bearing hole for connecting the output shaft of a disconnect differential or differential lock. The machining accuracy and surface quality of the bearing hole directly affect the assembly quality and operational reliability, so its dimensional accuracy and surface roughness need to be strictly controlled during the machining process. On the radial outer side of the first hole 1.1, three structural features with specific functions are designed: at least one first limiting feature 1.2 (designed as a circular limiting groove) for limiting the disconnect differential in the circumferential direction, at least one second limiting feature 1.3 (designed as a square limiting groove) for limiting the differential lock in the circumferential direction, and a plurality of precast holes 1.4 arranged at intervals in the circumferential direction. The projection shapes of these precast holes 1.4 in the reference plane perpendicular to the central axis of the first hole 1.1 are all located within the projection shapes of the first limiting feature 1.2 and the second limiting feature 1.3. This design ensures the compactness of the structure and the efficiency of space utilization.

[0030] The first limiting feature 1.2 adopts a circular limiting groove design, which has a simple processing technology, accurate positioning, and is easy to cooperate with the cylindrical positioning protrusion of the disconnect differential. The second limiting feature 1.3 adopts a square limiting groove design, which can effectively prevent assembly errors and improve assembly efficiency through shape differentiation design. These two different limiting feature shape designs reflect the innovative thinking of the present invention in error-proofing design.

[0031] The design of the precast holes 1.4 has a dual function: on the one hand, it is used to provide error-proofing when assembling the disconnect differential or differential lock, and on the other hand, it can avoid casting defects caused by excessive accumulation of local material during die casting. The number and distribution of the precast holes have been optimized to ensure structural strength and improve the reliability of the casting process.

[0032] Secondly, this embodiment adopts a careful geometric design in the structural layout. A specific angle is formed between the line connecting the center of the first limiting feature 1.2 and the center of the first hole 1.1, and the line connecting the center of the second limiting feature 1.3 and the center of the first hole 1.1. This angle design not only facilitates the distinction of the installation positions of different types of differentials, but also optimizes the force transmission path. At the same time, the distance from the center of the first limiting feature 1.2 and the second limiting feature 1.3 to the center of the first hole 1.1 corresponds to the distance from the center of the precast hole 1.4 to the center of the first hole 1.1, respectively. This design of geometric correspondence not only ensures the accuracy of assembly, but also improves the rationality and reliability of the overall structure.

[0033] In order to realize intelligent control and status monitoring, the main housing 1 is also provided with two important functional interfaces: the sensor installation hole 1.5 located on the right side of the bearing hole 1.1, for installing the position sensor 4, which can monitor the locking state of the disconnect differential and the differential lock 3 in real time; and the electromagnetic coil installation hole 1.6 located on the lower side of the bearing hole 1.1, for installing the electromagnetic coil 5, which controls the locking state of the disconnect differential and the differential lock. The positions of these two functional interfaces have been carefully designed to ensure the accuracy of signal acquisition and facilitate maintenance and replacement.

[0034] In terms of assembly process, this embodiment specifies detailed assembly process and quality control requirements:

[0035] 1. First, press fit the differential bearing inner ring 2.2 onto the output shaft of the disconnect differential / differential lock 3. During the press fitting process, the press fitting force and coaxiality must be controlled to ensure the quality of the interference fit between the bearing inner ring and the shaft.

[0036] 2. Secondly, press fit the differential bearing outer ring 2.1 into the differential bearing hole 1.1 of the main housing 1. This step also requires strict control of the press fit parameters to ensure the matching accuracy between the bearing outer ring and the housing.

[0037] 3. Then, the electromagnetic coil 5 is assembled to the electromagnetic coil interface 1.6 of the main housing 1 by bolt connection. When installing, attention should be paid to the direction of the electromagnetic coil and the correctness of the wiring.

[0038] 4. Next, assemble the disconnect differential and differential lock 3 to the main housing 1, ensuring that the limit fingers are correctly matched with the corresponding limit features. In this step, the precast holes 1.4 of the main housing 1 can effectively prevent the limit fingers of the disconnect differential / differential lock 3 from being incorrectly matched with the main housing 1, ensuring that the limit fingers can be accurately assembled into the limit grooves.

[0039] 5. Finally, assemble the position sensor 4 to the position sensor interface 1.5 of the main housing 1 by means of bolts, and perform signal testing and verification.

[0040] The design feature of this embodiment is that it makes full use of the structural features of the two differentials, arranges the interfaces along the Y-direction (axial) circumference with the differential bearing hole as the center, and realizes the compatibility of the main housing with the disconnect differential and the differential lock. This layout design not only ensures the compactness of the structure, but also optimizes the assembly process. The design of the precast hole 1.4 can not only effectively prevent assembly errors and ensure the accurate assembly of the limit finger, but also avoid casting defects caused by excessive local material accumulation, thereby improving the manufacturing quality of the product.

[0041] The design scheme of the present invention has significant cost advantages, mainly reflected in that only one set of main shell mold is needed to realize all functions, which greatly reduces mold investment and production costs. At the same time, the universal design reduces inventory types and optimizes supply chain management.

[0042] Second embodiment

[0043] The second embodiment of the present invention provides an electric drive assembly compatible with a disconnect differential and a differential lock, characterized in that a positioning feature 3.2 for cooperating with the first limiting feature 1.2 or the limiting feature 1.3 is provided on the disconnect differential or the differential lock. The positioning feature is designed to precisely match the limiting feature on the main housing, ensuring assembly accuracy and operational reliability. The electric drive assembly can be directly applied to the manufacture of new energy vehicles and has good engineering practice value.

[0044] Third embodiment

[0045] The present invention also provides a vehicle using the electric drive assembly. By using the electric drive assembly of the present invention, the vehicle can flexibly switch the differential working mode according to different driving conditions, thereby improving the performance of the whole vehicle and driving safety.

[0046] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A main housing compatible with a disconnect differential and a differential lock, characterized in that: The invention comprises a main housing (1), wherein the main housing (1) is provided with a first hole (1.1) for connecting an output shaft of a disconnect differential or a differential lock, wherein the radial outer side of the first hole (1.1) is provided with at least one first limiting feature (1.2) for circumferentially limiting the disconnect differential, at least one second limiting feature (1.3) for circumferentially limiting the differential lock, and a plurality of precast holes (1.4) arranged at intervals in the circumferential direction, wherein the projection shape of the precast holes (1.4) in a reference plane perpendicular to the central axis of the first hole (1.1) is located within the projection shape of the first limiting feature (1.2) and the second limiting feature (1.3) in a reference plane perpendicular to the central axis of the first hole (1.1).

2. The main housing of the compatible disconnect differential and differential lock according to claim 1, characterized in that: There is an angle between a line connecting the center of the first limiting feature (1.2) and the center of the first hole (1.1) and a line connecting the center of the second limiting feature (1.3) and the center of the first hole (1.1).

3. The main housing of the compatible disconnect differential and differential lock according to claim 1, characterized in that: The length of a line connecting the center of the first limiting feature (1.2) and the center of the first hole (1.1) corresponds to the length of a line connecting the center of the precast hole (1.4) and the center of the first hole (1.1).

4. The main housing of the compatible disconnect differential and differential lock according to claim 1, characterized in that: The length of a line connecting the center of the second limiting feature (1.3) and the center of the first hole (1.1) corresponds to the length of a line connecting the center of the precast hole (1.4) and the center of the first hole (1.1).

5. The main housing of the compatible disconnect differential and differential lock according to claim 3 or 4, characterized in that: The cross-sectional shape of the first limiting feature (1.2) is different from the cross-sectional shape of the second limiting feature (1.3).

6. The main housing of the compatible disconnect differential and differential lock according to claim 1, characterized in that: The main housing (1) is provided with a sensor mounting hole (1.5) for mounting a position sensor (4).

7. The main housing of the compatible disconnect differential and differential lock according to claim 1, characterized in that: The main housing (1) is provided with an electromagnetic coil mounting hole (1.6) for mounting the electromagnetic coil (5).

8. An electric drive assembly compatible with a disconnect differential and a differential lock, characterized in that: It comprises a disconnecting differential or a differential lock, wherein the disconnecting differential or the differential lock is mounted on the main housing as described in any one of claims 1-7.

9. The electric drive assembly compatible with a disconnect differential and a differential lock according to claim 8, characterized in that: The disconnect differential or the differential lock is provided with a positioning feature (3.2) for cooperating with the first limiting feature (1.2) or the limiting feature (1.3).

10. A vehicle, characterized in that: An electric drive assembly comprising a disconnect differential and a differential lock compatible with claims 8-9.

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