Profiling heat preservation cover of electric drive axle assembly

Abstract

The utility model provides a profiling heat preservation cover for an electric drive axle assembly. The operation efficiency of an electric drive axle under the low-temperature condition is remarkably improved. The device comprises a front cover body; a rear cover body; the front cover body and the rear cover body are each composed of an inner layer, a heat preservation layer and an outer layer. The front cover body covers the front vertical face of an electric drive axle assembly, the rear cover body covers the rear vertical face of the electric drive axle assembly, the rear contour edge of the front cover body is attached to the front contour edge of the rear cover body, and the front cover body and the rear cover body are combined to form two-end avoiding notches. The front cover body and the rear cover body are combined to form a line connecting notch, the avoiding notches in the two ends enable the electric drive axle assembly to be arranged in a side protruding mode corresponding to the corresponding portion of an axle shell of a half axle, and the line connecting notch enables an electrical line to enter an inner cavity of the electric drive axle assembly. An inner cavity defined by the front cover body and the rear cover body is arranged corresponding to the appearance of the electric drive axle assembly in a profiling mode.

Description

Technical Field

[0001] This utility model relates to the technical field of electric drive bridge insulation, specifically a contoured insulation cover for an electric drive bridge assembly. Background Technology

[0002] During the colder seasons of late autumn, winter, and early spring, electric drive axles face numerous challenges in operation. In low-temperature environments, the viscosity of the lubricating oil within the electric drive axle increases significantly, leading to a substantial increase in oil churning losses during gear operation. This, in turn, reduces the operating efficiency of the electric drive axle, increases energy consumption, and impacts the performance and driving range of the entire powertrain. Existing technologies offer relatively limited optimization measures for electric drive axles in low-temperature environments and cannot effectively address the series of problems caused by increased lubricating oil viscosity. Therefore, developing a device that can maintain a relatively high lubricating oil temperature within the electric drive axle is of great significance for improving the operating efficiency of electric drive axles under low-temperature conditions. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a contoured heat preservation cover for an electric drive axle assembly. This cover can maintain a relatively high lubricating oil temperature inside the electric drive axle in low-temperature environments, effectively reducing the viscosity of the lubricating oil and minimizing oil churning losses in the gears of the electric drive axle, thereby significantly improving the operating efficiency of the electric drive axle under low-temperature conditions.

[0004] A contoured thermal insulation cover for an electric drive bridge assembly, characterized in that it comprises:

[0005] Front cover;

[0006] Rear cover;

[0007] Both the front cover and the rear cover are composed of an inner layer, an insulation layer, and an outer layer;

[0008] The front cover is mounted on the front surface of the electric drive axle assembly, and the rear cover is mounted on the rear surface of the electric drive axle assembly. The rear contour edge of the front cover is fitted to the front contour edge of the rear cover. The front cover and the rear cover together form clearance notches at both ends. The front cover and the rear cover together form wiring connection notches. The clearance notches at both ends cause the corresponding part of the axle housing of the electric drive axle assembly to be convex on the side. The wiring connection notches allow electrical wiring to enter the inner cavity of the electric drive axle assembly.

[0009] The inner cavity formed by the front cover and the rear cover is modeled after the shape of the corresponding electric drive bridge assembly.

[0010] Its further features are:

[0011] The overall front-to-back distance of the rear cover is greater than the overall front-to-back distance of the front cover, ensuring that the covers in the two positions can be quickly distinguished.

[0012] The front cover has a first positioning mounting hole on the horizontal side corresponding to the clearance notch at both ends. The fastener passes through the first positioning mounting hole and is fixed to the corresponding housing of the electric drive bridge assembly. The rear cover has a second positioning mounting hole on the horizontal side corresponding to the clearance notch at both ends. The fastener passes through the second positioning mounting hole and is fixed to the corresponding housing of the electric drive bridge assembly.

[0013] The rear contour edge of the front cover and the front contour edge of the rear cover are fixedly connected by a snap-fit ​​structure to ensure the integrity of the front cover and the rear cover after assembly.

[0014] It also includes a sealing structure, which is provided corresponding to the clearance notches at both ends and the wiring connection notches. The surface of the sealing structure is in close contact with the inner layer of the housing, front cover and rear cover of the electric drive bridge assembly.

[0015] The front end of the front cover is also provided with a protruding motor positioning auxiliary mechanism, which is used to assist in positioning the motor.

[0016] The inner layer is made of a metal material with good thermal conductivity. Its function is to quickly absorb the heat generated when the electric drive bridge is working and transfer the heat to the insulation layer. The shape of the inner layer is precisely designed according to the specific structure of the electric drive bridge assembly to ensure close contact with the surface of the electric drive bridge assembly and improve heat conduction efficiency.

[0017] The insulation layer is located between the inner and outer layers. The insulation layer uses high-efficiency insulation material with an extremely low thermal conductivity, which can effectively prevent heat from being transferred from the inner layer to the outer layer and retain the heat in the electric drive bridge. The thickness of the insulation layer is reasonably selected according to actual needs to achieve the best insulation effect.

[0018] The outer layer is made of a material with certain strength and wear resistance. The outer layer can not only protect the inner insulation layer and inner layer from the influence of the external environment, but also further reduce the radiative loss of heat.

[0019] The outer surface is coated with an anti-radiation coating to reduce heat loss through radiation.

[0020] With this invention, the inner cavity formed by the front cover and the rear cover is used to house the electric drive bridge assembly. The conformal heat insulation cover is designed to conform to the shape of the electric drive bridge assembly. The clearance notches at both ends allow the corresponding part of the bridge housing of the electric drive bridge assembly to be convex on the side. The wiring connection notch allows the electrical wiring to enter the inner cavity of the electric drive bridge assembly. This design can maintain the lubricating oil temperature in the electric drive bridge at a relatively high level in low-temperature environments, effectively reducing the viscosity of the lubricating oil and reducing the oil churning loss of the gears in the electric drive bridge, thereby significantly improving the operating efficiency of the electric drive bridge in low-temperature conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the electric drive bridge assembly corresponding to the contour-following heat insulation cover of this utility model;

[0022] Figure 2 A perspective view of a contour-following heat-insulating cover according to a specific embodiment of the utility model;

[0023] Figure 3 for Figure 2 Side view;

[0024] Figure 4 for Figure 2 The main view;

[0025] Figure 5 Figure 2 A schematic diagram of the longitudinal section structure;

[0026] The names corresponding to the serial numbers in the diagram are as follows:

[0027] Electric drive bridge assembly 100;

[0028] Front cover 10, rear contour edge 11, first positioning mounting hole 12, motor positioning auxiliary mechanism 13, rear cover 20, front contour edge 21, second positioning mounting hole 22, clearance notch 30, wiring connection notch 40;

[0029] Inner layer 1, insulation layer 2, outer layer 3, sealing structure 4. Detailed Implementation

[0030] A contoured thermal insulation cover for an electric drive bridge assembly, see Figures 2-5 It includes a front cover 10 and a rear cover 20;

[0031] Both the front cover 10 and the rear cover 20 are composed of an inner layer 1, an insulation layer 2, and an outer layer 3;

[0032] The front cover 10 is installed on the front surface of the electric drive axle assembly 100, and the rear cover 20 is installed on the rear surface of the electric drive axle assembly 100. The rear contour edge 11 of the front cover 10 is fitted to the front contour edge 21 of the rear cover 20. The front cover 10 and the rear cover 20 are combined to form clearance notches 30 at both ends. The front cover 10 and the rear cover 20 are combined to form a wiring connection notch 40. The clearance notches 10 at both ends cause the corresponding part of the axle housing of the electric drive axle assembly 100 corresponding to the half shaft to be convex. The wiring connection notch 40 allows electrical wiring to enter the inner cavity of the electric drive axle assembly 100.

[0033] The inner cavity formed by the front cover 10 and the rear cover 20 is modeled after the outer shape of the corresponding electric drive bridge assembly 100.

[0034] In practice:

[0035] The overall front-to-back distance of the rear cover 20 is greater than the overall front-to-back distance of the front cover 10, ensuring that the covers in the two positions can be quickly distinguished.

[0036] The front cover 10 has a first positioning mounting hole 12 on the horizontal side corresponding to the clearance notch 30 at both ends. The fastener passes through the first positioning mounting hole 12 and is fixed to the corresponding housing of the electric drive bridge assembly 100. The rear cover 20 has a second positioning mounting hole 22 on the horizontal side corresponding to the clearance notch 30 at both ends. The fastener passes through the second positioning mounting hole 22 and is fixed to the corresponding housing of the electric drive bridge assembly 100.

[0037] In a preferred embodiment, the rear contour edge 11 of the front cover 10 and the front contour edge 21 of the rear cover 20 are reliably fixed together by a snap-fit ​​structure (i.e., forming a groove structure for alignment and insertion), ensuring the integrity of the front cover 10 and the rear cover 20 after assembly.

[0038] In specific implementation, it also includes several sealing structures 4, which are set corresponding to the clearance gaps 30 at both ends and the line connection gaps 40. The surface of the sealing structure 4 is in close contact with the inner layer of the housing, front cover 10 and rear cover 20 of the electric drive bridge assembly 100.

[0039] In specific implementation, the front end of the front cover 10 is also provided with a protruding motor positioning auxiliary mechanism 13. The motor positioning auxiliary mechanism 13 is used to assist in the positioning of the motor. The position of the motor positioning auxiliary mechanism 13 that is in contact with the motor is also provided with a sealing structure 4 to ensure reliable auxiliary positioning of the motor.

[0040] In a specific embodiment, the inner layer 1 is made of a metal material with good thermal conductivity. The function of the inner layer 1 is to quickly absorb the heat generated when the electric drive bridge is working and transfer the heat to the insulation layer. The shape of the inner layer 1 is precisely designed according to the specific structure of the electric drive bridge assembly to ensure close contact with the surface of the electric drive bridge assembly and improve the heat conduction efficiency.

[0041] The insulation layer 2 is located between the inner layer 1 and the outer layer 3. The insulation layer 2 uses high-efficiency insulation material. The insulation material of the insulation layer 2 has an extremely low thermal conductivity, which can effectively prevent heat from being transferred from the inner layer to the outer layer and retain the heat in the electric drive bridge. The thickness of the insulation layer 2 is reasonably selected according to actual needs to achieve the best insulation effect.

[0042] The outer layer 3 is made of a material with certain strength and wear resistance. The outer layer 3 can not only protect the inner insulation layer and inner layer from the influence of the external environment, but also further reduce the radiative loss of heat.

[0043] In a specific embodiment, the inner layer 1 is made of aluminum alloy, the insulation layer 2 is made of polyurethane foam or aerogel felt, the outer layer 3 is made of carbon fiber composite material or high-strength engineering plastic, and an anti-radiation coating is added to the surface of the outer layer 3 to reduce heat loss through radiation.

[0044] In practice, the sealing structure 4 uses a rubber sealing strip or a silicone sealing gasket. The sealing structure 4 is installed in the edge groove of the heat insulation cover. When the heat insulation cover is installed on the electric drive bridge, the sealing structure 4 can fit tightly against the surface of the electric drive bridge to prevent cold air from entering the inside of the heat insulation cover and reduce heat exchange.

[0045] In practice, mounting holes or slots are provided on the edges and key parts of the insulation cover. With the help of bolts, clips and other connecting parts, the insulation cover can be installed on the electric drive bridge in a convenient and secure manner. At the same time, the design of the installation structure should ensure that the insulation cover and the electric drive bridge will not be damaged during installation and disassembly.

[0046] It has the following beneficial effects:

[0047] To improve operating efficiency, by maintaining the lubricating oil temperature in the electric drive axle at a relatively high level, the viscosity of the lubricating oil is effectively reduced, and the oil churning loss of the gears is reduced, thereby significantly improving the operating efficiency of the electric drive axle under low temperature conditions and reducing energy consumption.

[0048] The lower lubricating oil viscosity and churning loss reduce wear on gears and other transmission components, thus extending the service life of the electric drive axle and reducing maintenance costs.

[0049] Adaptable to various environments, the contoured insulation cover's design can accommodate different models and structures of electric drive bridges, offering broad applicability. Furthermore, its excellent insulation and protective properties enable it to operate normally in various harsh low-temperature environments.

[0050] Easy to install, it adopts a simple and reliable installation and sealing structure, making the installation and disassembly of the insulation cover convenient and quick, and easy to maintain and replace.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric drive axle assembly profiling heat shield, comprising: It includes: The front cover; The rear cover; The front cover, rear cover are composed of inner layer, thermal insulation layer and outer layer; The front cover is installed on the front facade of the electric drive axle assembly, the rear cover is installed on the rear facade of the electric drive axle assembly, the rear contour edge of the front cover is matched with the front contour edge of the rear cover, the front cover and the rear cover are combined to form two end avoiding notches, the front cover and the rear cover are combined to form a wiring connection notch, the two end avoiding notches make the corresponding part of the axle shell of the electric drive axle assembly protrude on one side, and the wiring connection notch enables the electrical wiring to enter the inner cavity of the electric drive axle assembly. The inner cavity formed by the front cover and the rear cover is shaped according to the shape of the corresponding electric drive axle assembly.

2. An electric drive axle assembly profiled heat shield according to claim 1, characterized in that: The overall front-to-back distance of the rear cover is greater than that of the front cover.

3. An electric drive axle assembly profiled heat shield according to claim 1, characterized in that: The horizontal edge of the front cover corresponding to the avoiding notches at both ends is provided with a first positioning mounting hole, and a fastener is fixed to the corresponding shell of the electric drive axle assembly after penetrating the first positioning mounting hole; the horizontal edge of the rear cover corresponding to the avoiding notches at both ends is provided with a second positioning mounting hole, and a fastener is fixed to the corresponding shell of the electric drive axle assembly after penetrating the second positioning mounting hole.

4. An electric drive axle assembly profiled heat shield according to claim 2, characterized in that: The rear contour edge of the front cover and the front contour edge of the rear cover are fixed by a buckle structure.

5. An electric drive axle assembly profiled heat shield according to claim 1, characterized in that: It also includes a sealing structure, which is arranged corresponding to the two end avoiding notches and the wiring connection notch, and the surface of the sealing structure is tightly attached to the shell of the electric drive axle assembly, the inner layer of the front cover and the rear cover.

6. An electric drive axle assembly profiled heat shield according to claim 1, characterized in that: The front end of the front cover is also provided with a front convex motor positioning auxiliary mechanism.

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