Electric drive assembly
By designing a compact oil conduction ring and seal structure in the electric drive assembly, the problem of insufficient internal space of the existing electric drive assembly is solved, and high power output and structural compactness are achieved.
Patent Information
- Application Number
- CN202420942765.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-30
AI Technical Summary
While increasing the power, the existing electric drive assembly has insufficient internal space, resulting in poor structural compactness and cannot meet the needs of high power output.
By designing a structure including a housing, a stator assembly, an oil conduction ring, a first seal and a second seal in the electric drive assembly, the space occupied by the seal and ends is reduced by using the design of the oil conduction ring, thereby achieving structural compactness.
This design effectively reduces the space occupation of the electric drive assembly, improves the internal space utilization, and ensures the high power output capability of the electric drive assembly without increasing the total volume.
Smart Images
Figure CN222620829U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electric drive, and in particular to an electric drive assembly. Background Art
[0002] Oil-cooled motors are a type of motor that uses an oil cooling system to cool the motor components. They are typically used in applications that require high power output and continuous operation, such as industrial drives, wind turbines, and marine propulsion systems. The working principle of oil-cooled motors is to keep the temperature of the motor within a safe range by transferring the heat generated inside the motor to the cooling oil, which is then dissipated to the external environment through the oil cooler.
[0003] In order to meet the increasingly higher power demand of the electric drive assembly, the electric drive assembly increases the motor power by setting an integrated bus. However, the setting of the integrated bus occupies more space. Without increasing the volume of the electric drive assembly, the existing electric drive assembly has the problem of insufficient internal space.
[0004] Therefore, it is necessary to propose a new electric drive assembly to solve the above problems. Utility Model Content
[0005] The purpose of the present application is to provide an electric drive assembly with a compact structure.
[0006] The present application provides an electric drive assembly, comprising: a housing, a stator assembly, an oil guide ring, a first seal and a second seal; the oil guide ring and the stator assembly are located in a cavity surrounded by the housing; the oil guide ring comprises a first end and a second end opposite to each other; the first seal comprises a base and a first sealing portion extending from the base; the base is arranged on the outside of the first end, and the first sealing portion is tightly sealed with the housing; the second seal is tightly sealed with the second end and the stator assembly.
[0007] Furthermore, the oil guide ring includes a main body, the first end portion and the second end portion extend from the main body to two ends, and the thickness of the side wall of the first end portion is smaller than the thickness of the side wall of the main body.
[0008] Furthermore, the oil guide ring includes a convex portion for abutting against the free end of the base.
[0009] Further, along the radial direction of the oil guide ring, the convex portion extends beyond the main body portion.
[0010] Further, along the direction from the second end to the first end, the first sealing portion extends beyond the edge of the first end to fit and seal with the shell.
[0011] Furthermore, the main body is provided with a through hole, the shell is provided with an oil passage, and the through hole communicates with the oil passage and the space surrounded by the oil guide ring.
[0012] Further, the oil guide ring includes a rough portion disposed on an outer surface of the first end portion to increase a retaining force between the base portion and the outer surface of the first end portion.
[0013] Furthermore, the rough portion is a first corrugated portion arranged on the outer surface.
[0014] Furthermore, the first sealing member includes a plurality of second corrugated portions disposed on the first sealing portion, and the second corrugated portions are matched with the first corrugated portions in a concave-convex manner.
[0015] Furthermore, the electric drive assembly also includes a bus, and an end of the bus is located in the space surrounded by the first end.
[0016] The electric drive assembly of the present application arranges the base of the first seal on the outside of the first end of the oil guide ring, thereby reducing the space occupied by the first seal and the first end along the radial direction of the oil guide ring, thereby making the electric drive assembly compact.
[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.
[0019] Figure 1 It is a cross-sectional view of the electric drive assembly of the present application, wherein only a portion of the electric drive assembly is shown.
[0020] Figure 2 yes Figure 1 The cross-sectional view of the oil guide ring, the first seal and the second seal after being assembled is shown, wherein only a portion of the oil guide ring, the first seal and the second seal are shown.
[0021] Explanation of the reference numerals: 1. housing; 10. oil chamber; 2. stator assembly; 21. stator core; 211. stator oil channel; 22. stator winding; 3. oil guide ring; 31. main body; 311. through hole; 32. first end; 33. second end; 330. cavity; 332. first branch; 333. second branch; 34. stop convex portion; 35. first corrugated portion; 4. first sealing member; 41. base; 42. first sealing member; 43. second corrugated portion; 5. second sealing member; 51. fixing portion; 52. second sealing member; 53. third sealing member; 6. busbar. DETAILED DESCRIPTION
[0022] Next, the embodiments of this specification are described in detail.
[0023] Please refer to Figure 1 to Figure 2 As shown, the present application provides an electric drive assembly, including: a housing 1, a stator assembly 2, an oil guide ring 3, a first seal 4 and a second seal 5. The oil guide ring 3 and the stator assembly 2 are located in a cavity surrounded by the housing 1.
[0024] The oil guide ring 3 is hollow and cylindrical with holes at both ends, including a main body 31 and a first end 32 and a second end 33 extending from the main body 31 to both sides. The first end 32 and the second end 33 are located at opposite ends of the main body 31. The main body 31, the first end 32 and the second end 33 are all annular. The first seal 4 includes a base 41 and a first seal 42 extending from the base 41. The base 41 is annular and is arranged on the outside of the first end 32, and the first seal 42 is sealed with the housing 1. The first seal 42 is annular. The second seal 5 is fixed and sealed with the second end 33, and the second seal 5 is also sealed with the stator assembly 2.
[0025] The electric drive assembly of the present application arranges the base 41 of the first seal 4 outside the first end 32 of the oil guide ring 3, thereby reducing the space occupied by the first seal 4 and the first end 32 along the radial direction of the oil guide ring 3, so that the electric drive assembly has a compact structure.
[0026] Optionally, the thickness H1 of the side wall of the first end portion 32 is less than the thickness H2 of the side wall of the main body portion 31, and the space occupied by the first seal 4 and the first end portion 32 is reduced along the radial direction of the oil guide ring 3. Since the space occupied by the first seal 4 and the first end portion 32 is reduced, the space enclosed by the first end portion 32 can be larger, and more space can be reserved for arranging other components of the electric drive assembly, such as the bus 6 of the electric drive assembly, so that the space utilization rate is improved without increasing the volume of the electric drive assembly, making the structure of the electric drive assembly more compact.
[0027] The oil guide ring 3 includes a convex portion 34, which is located on the outer surface of the main body 31 and close to the first end 32. The convex portion 34 extends beyond the main body 31 along the radial direction of the oil guide ring 3.
[0028] The protrusion 34 is used to abut against the free end of the base 41, so as to limit the first seal 4 and prevent the electric drive assembly from shaking during operation, thereby causing the first seal 4 to bend, tilt and shift, resulting in sealing failure.
[0029] Optionally, the convex portion 34 may not be provided, and the base 41 is tightly matched with the first end portion 32 , that is, the inner diameter of the ring formed by the base 41 is slightly smaller than the outer diameter formed by the outer surface of the first end portion 32 .
[0030] Along the radial direction of the oil guide ring 3 , the base 41 may be higher than the convex portion 34 , may be lower than the convex portion 34 , or may be flush with the convex portion 34 , and the present application does not impose any limitation on this.
[0031] Along the direction from the second end 33 to the first end 32 , the first sealing portion 42 extends beyond the edge of the first end 32 to fit and seal with the housing 1 .
[0032] Optionally, along the direction from the second end 33 to the first end 32 , the first sealing portion 42 may be flush with the edge of the first end 32 or retracted relative to the edge of the first end 32 , and the outer surface of the base 41 may be tightly sealed with the housing 1 .
[0033] Optionally, the oil guide ring 3 includes a rough portion disposed on the outer surface of the first end portion 32 to increase the retaining force between the base portion 41 and the outer surface of the first end portion 32 .
[0034] In an embodiment of the present application, the rough portion is a first corrugated portion 35 arranged on the outer surface of the oil guide ring 3, and the first seal 4 includes a plurality of second corrugated portions 43 arranged on the first sealing portion 42, and the second corrugated portions 43 are matched with the first corrugated portions 35 in a concave-convex manner to increase the holding force between the base 41 and the outer surface of the first end portion 32.
[0035] In other embodiments of the present application, the rough portion may be a convex portion (not shown) arranged on the outer surface of the oil guide ring 3, or a mesh portion (not shown), or a spiral portion (not shown), and the present application does not impose any restrictions on this.
[0036] The stator assembly 2 includes a stator core 21 and a stator winding 22. The stator winding 22 is arranged in the space surrounded by the oil guide ring 3. The electric drive assembly also includes a bus bar 6, and the end of the bus bar 6 is located in the space surrounded by the first end 32. The arrangement of the oil guide ring 3 and the first seal 4 in the embodiment of the present application can provide sufficient space for arranging the bus bar 6, thereby improving the working efficiency of the electric drive assembly.
[0037] The bus 6 is a collection of electrical connection lines or signal lines that connect various components inside the electric drive assembly (such as batteries, controllers, motors, etc.). In the electric drive assembly, the bus 6 usually undertakes the tasks of transmitting electric energy, control signals and monitoring data.
[0038] The busbar 6 is usually made of a material that is resistant to high temperatures, corrosion, and has good electrical conductivity, such as metallic copper, metallic aluminum, copper-aluminum composite materials, copper-clad steel, copper-clad aluminum, copper alloys, and the like, to ensure reliability and stability in high temperature and harsh environments of the electric drive assembly.
[0039] Optionally, the oil guide ring 3 of the present application is provided as a pair, which are respectively arranged on the circumferential sides of both ends of the stator winding 22 .
[0040] The main body 31 is provided with a through hole 311, the housing 1 is provided with an oil passage (not shown), the housing 1 and the oil guide ring 3 enclose an oil chamber 10, and the oil chamber 10 is connected to the oil passage. The through hole 311 communicates the space enclosed by the oil chamber 10 and the oil guide ring 3. A stator oil passage 211 is provided on the upper part of the stator core 21. The cooling oil enters the oil chamber 10 from the oil passage of the housing 1, part of it flows into the space enclosed by the oil guide ring 3 through the through hole 311 and sprays toward the stator winding 22, and part of it passes through the stator oil passage 211 and the through hole 311 of another oil guide ring 3 and then sprays toward the other stator winding 22, thereby cooling the stator winding 22 on the other side.
[0041] The second end portion 33 includes a first branch portion 332 and a second branch portion 333 which are sequentially arranged from outside to inside along the radial direction of the oil guide ring 3. The first branch portion 332 and the second branch portion 333 enclose a cavity 330, a portion of the second sealing member 5 is located in the cavity 330 to be fixed and sealed with the oil guide ring 3, and a portion of the second sealing member 5 is located outside the cavity 330 and is sealed with the stator core 21 to prevent the cooling oil from flowing out through the gap between the oil guide ring 3 and the stator core 21, thereby reducing the amount of cooling oil sprayed from the through hole 311 to the stator winding 22, causing the temperature of the stator assembly 2 to be too high.
[0042] The provision of the cavity 330 increases the stability of the second seal 5 , prevents the vibration generated during the operation of the electric drive assembly from causing the second seal 5 to bend, tilt and shift, resulting in sealing failure of the second seal 5 , and improves the sealing effect of the second seal 5 .
[0043] The second sealing member 5 includes a fixing portion 51 and a second sealing portion 52 and a third sealing portion 53 disposed on both sides of the fixing portion 51. The second sealing portion 52 is sealed against the oil guide ring 3, and the third sealing portion 53 is sealed against the stator core 21.
[0044] Optionally, the second sealing portion 52 may not be provided, and the fixed portion 51 and the oil guide ring 3 may be tightly sealed. For example, the fixed portion 51 and the first branch 332 may be tightly sealed, or the fixed portion 51 and the second branch 333 may be tightly sealed, or the fixed portion 51 and the first branch 332 and the second branch 333 may be tightly sealed at the same time.
Claims
1. An electric drive assembly, characterized in that: include: A housing, a stator assembly, an oil guide ring, a first seal and a second seal; the oil guide ring and the stator assembly are located in a cavity surrounded by the housing; the oil guide ring includes a first end and a second end opposite to each other; the first seal includes a base and a first sealing portion extending from the base; the base is arranged on the outside of the first end, and the first sealing portion is tightly sealed with the housing; the second seal is tightly sealed with the second end and the stator assembly.
2. The electric drive assembly according to claim 1, characterized in that: The oil guide ring includes a main body, the first end portion and the second end portion extend from the main body to two ends, and the thickness of the side wall of the first end portion is smaller than the thickness of the side wall of the main body.
3. The electric drive assembly according to claim 2, characterized in that: The oil guide ring comprises a convex portion for abutting against the free end of the base.
4. The electric drive assembly according to claim 3, characterized in that: The protrusion extends beyond the main body along the radial direction of the oil guide ring.
5. The electric drive assembly according to claim 3, characterized in that: Along the direction from the second end to the first end, the first sealing portion extends beyond the edge of the first end to fit and seal with the shell.
6. The electric drive assembly according to claim 2, characterized in that: The main body is provided with a through hole, the shell is provided with an oil passage, and the through hole communicates with the oil passage and a space surrounded by the oil guide ring.
7. The electric drive assembly according to claim 1, characterized in that: The oil guide ring includes a rough portion disposed on an outer surface of the first end portion to increase a retaining force between the base portion and the outer surface of the first end portion.
8. The electric drive assembly according to claim 7, characterized in that: The rough portion is a first corrugated portion disposed on the outer surface.
9. The electric drive assembly according to claim 8, characterized in that: The first sealing member includes a plurality of second corrugated portions disposed on the first sealing portion, and the second corrugated portions are matched with the first corrugated portions in a concave-convex manner.
10. The electric drive assembly according to any one of claims 1 to 9, characterized in that: The electric drive assembly further includes a bus, an end of which is located in a space surrounded by the first end.