A motor reducer integrated housing structure

Abstract

The utility model relates to a kind of motor reducer integrated shell structure, comprising: integrated shell, oil baffle, reducer oil return hole, oil pump oil inlet, first motor oil return hole, second motor oil return hole, oil drain screw plug, cover plate, left shell and matching rib;Integrated shell lower side inner wall, oil baffle, left shell lower side inner wall and matching rib jointly form reducer oil sump area;Integrated shell upper side inner wall, oil baffle, left shell upper side inner wall and matching rib jointly form gear oil stirring area;Integrated shell bottom inner wall, cover plate and oil drain screw plug jointly form motor oil sump area;Reducer oil sump area and motor oil sump area are communicated by reducer oil return hole;Oil pump oil inlet is arranged in motor side, and oil pump oil inlet is communicated with motor interior by first motor oil return hole, second motor oil return hole.The utility model has the advantages of optimizing lubrication system efficiency, reducing lubricating oil filling amount, improving oil pump oil suction stability compared with prior art.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle powertrain, and in particular to an integrated housing structure for a motor reducer. Background Technology

[0002] Existing integrated housings have long motor oil return paths, large gear churning spaces, slow oil circulation, large oil filling volumes, significant churning losses, and low efficiency.

[0003] CN202311866732.4 discloses a multi-unit lubrication device with a shared housing, including a motor and a reducer, as well as an oil return chamber. One end of the oil return chamber is located at the lowest point of the rear end of the motor, and the other end is located at the lowest point of the reducer. An oil suction port is located inside the oil return chamber. An oil filter is installed on the motor housing, with its inlet connected to the suction port. An oil pump is also installed on the motor housing, with its inlet connected to the outlet of the oil filter. The oil pump and oil filter are coaxially arranged. However, this multi-unit lubrication device relies on oil flowing naturally from the motor side and the reducer side back to a shared oil return chamber. Although the oil return chamber connects the lowest points on both sides, the oil inside the motor needs to travel a long path to return, especially the oil returning from the front end of the motor. Furthermore, the gear churning space is large, resulting in significant churning losses and low efficiency. CN202110291037.4 discloses a method and structure for ensuring sufficient active lubrication oil intake in a three-in-one transmission. The method includes an oil return hole on the front housing between the motor housing and the transmission, an oil intake port adjacent to the oil return hole, and an oil accumulation cavity formed by a baffle plate on the front housing. The baffle plate includes an oil-separating rib and an oil-baffle plate. The front end of the oil-separating rib is integrally connected to the front housing, and the upper part of the oil-baffle plate is installed at the rear end of the front housing. The oil accumulation cavity is formed by the oil-separating rib and the oil-baffle plate overlapping with the front housing. By setting a rib between the main and secondary churning cavities and utilizing the oil supply hole on the oil accumulation cavity for "controlled oil supply," the gear churning resistance is reduced. However, the orifice diameter of the oil supply hole needs precise calculation, and the oil ultimately still needs to flow into a relatively large churning area. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the existing technology and provide an integrated housing structure for a motor reducer, which optimizes the efficiency of the lubrication system, reduces energy loss, reduces the amount of lubricating oil added, achieves lightweight and low cost, improves the oil pump suction stability, ensures system reliability, and has a compact structure, optimizing the overall vehicle space layout.

[0005] The objective of this utility model can be achieved through the following technical solutions: This utility model provides an integrated housing structure for a motor reducer, including: an integrated housing, an oil baffle, a reducer oil return hole, an oil pump inlet, a first motor oil return hole, a second motor oil return hole, an oil drain plug, a cover plate, a left housing, and mating ribs; The lower inner wall of the integrated housing, the oil baffle, the lower inner wall of the left housing, and the mating ribs together form the reducer oil pan area; the upper inner wall of the integrated housing, the oil baffle, the upper inner wall of the left housing, and the mating ribs together form the gear oil churning area; the bottom inner wall of the integrated housing, the cover plate, and the drain plug together form the motor oil pan area. The reducer oil pan area and the motor oil pan area are connected through the reducer oil return hole; the oil pump inlet is located on the motor side and is connected to the reducer oil pan area through the reducer oil return hole; the oil pump inlet is connected to the inside of the motor through the first motor oil return hole and the second motor oil return hole.

[0006] Furthermore, the reducer's oil return hole is connected to the oil pump's oil inlet, allowing the lubricating oil inside the reducer to flow to the oil pump's oil inlet through the reducer's oil return hole.

[0007] Furthermore, the first motor oil return hole and the second motor oil return hole are respectively connected to the oil pump inlet, and the lubricating oil inside the motor can flow to the oil pump inlet through the first motor oil return hole and the second motor oil return hole.

[0008] Furthermore, the integrated housing and the cover plate are welded using a friction stir welding process.

[0009] Furthermore, the cover plate and the drain plug are threaded together.

[0010] Furthermore, the gear oil-stirring area is formed by the oil-blocking ribs and the mating ribs enclosing the upper inner wall of the integrated housing and the left housing.

[0011] Furthermore, the volume of the gear oil-stirring area is smaller than the volume of the entire housing cavity. Furthermore, the oil pump inlet is located near the oil return holes of the first motor and the second motor.

[0012] Furthermore, the motor oil pan area is an independent, sealed space formed by the integrated housing bottom inner wall, cover plate, and drain plug, which reduces the height of the motor oil return area.

[0013] Furthermore, the reducer oil return hole connects the reducer oil pan area and the motor oil pan area, so that the lubricating oil on the reducer side can flow into the motor side. Compared with the prior art, the present invention has the following advantages: (1) Optimize the efficiency of the lubrication system and reduce energy loss. By setting up independent reducer oil pan areas and motor oil pan areas, and connecting them through the reducer oil return hole, a high-efficiency lubrication oil circulation system is constructed. This shortens the motor oil return path, speeds up the oil circulation, and effectively solves the problems of slow oil circulation, large oil churning space, and low efficiency caused by the traditional structure.

[0014] (2) Reduced lubricant filling volume, achieving lightweight and low cost. Specific oil agitation areas and oil pan areas are separated by ribs, achieving efficient oil utilization. The gear-shaped oil agitation area formed by the oil-blocking ribs and mating ribs is much smaller than the entire housing cavity, allowing the oil to quickly flow back to the oil pan after being agitated. This reduces the total lubricant volume required, decreasing the amount of oil added, thereby achieving product lightweighting and reduced operating costs.

[0015] (3) Improve the oil pump's suction stability and ensure system reliability. Position the oil pump inlet on the motor side and close to the motor's return oil hole. This reduces the disturbance to the oil surface in the oil pan caused by gear churning, while ensuring that the hotter oil returning from the motor can be quickly recycled. The oil pump is less likely to draw in air during suction, ensuring a stable oil supply to the lubrication system, improving motor cooling, and enhancing the reliability of the entire transmission system.

[0016] (4) Compact structure, optimizing the overall vehicle space layout. By integrating components such as the housing and cover to form an independent motor oil pan area, this structure effectively reduces the height required for the motor oil return area. This compact design frees up more space for the vehicle's chassis layout, allowing more space to be allocated to the passenger compartment or other components, thus improving the overall vehicle's space utilization and design flexibility. Attached Figure Description

[0017] Figure 1 A schematic diagram of the integrated housing structure for a motor reducer; Figure 2 Schematic diagram of the structure of the motor oil pan area Figure 1 ; Figure 3 Schematic diagram of the structure of the motor oil pan area Figure 2 ; Figure 4 This is a schematic diagram of the gear oil stirring area. Reference numerals: 1-Integrated housing; 2-Oil baffle; 3-Reducer oil pan area; 4-Reducer oil return hole; 5-Oil pump inlet; 6-First motor oil return hole; 7-Second motor oil return hole; 8-Motor oil pan area; 9-Drain plug; 10-Cover plate; 11-Left housing; 12-Matching rib. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0019] Example 1 This embodiment provides an integrated housing structure for a motor reducer, such as... Figure 1-4 As shown, it includes: integrated housing 1, oil baffle 2, reducer oil return hole 4, oil pump inlet 5, first motor oil return hole 6, second motor oil return hole 7, drain plug 9, cover plate 10, left housing 11 and mating rib 12. The lower inner wall of the integrated housing 1, the oil baffle 2, the lower inner wall of the left housing 11, and the mating rib 12 together form the reducer oil pan area 3; the upper inner wall of the integrated housing 1, the oil baffle 2, the upper inner wall of the left housing 11, and the mating rib 12 together form the gear oil stirring area; the bottom inner wall of the integrated housing 1, the cover plate 10, and the drain plug 9 together form the motor oil pan area 8. The reducer oil pan area 3 and the motor oil pan area 8 are connected through the reducer oil return hole 4; the oil pump inlet 5 is located on the motor side and is connected to the reducer oil pan area 3 through the reducer oil return hole 4; the oil pump inlet 5 is connected to the inside of the motor through the first motor oil return hole 6 and the second motor oil return hole 7.

[0020] Example 2 This embodiment provides an integrated housing structure for a motor reducer, such as... Figure 1-4 As shown, it includes: integrated housing 1, oil baffle 2, reducer oil return hole 4, oil pump inlet 5, first motor oil return hole 6, second motor oil return hole 7, drain plug 9, cover plate 10, left housing 11 and mating rib 12. The lower inner wall of the integrated housing 1, the oil baffle 2, the lower inner wall of the left housing 11, and the mating rib 12 together form the reducer oil pan area 3; the upper inner wall of the integrated housing 1, the oil baffle 2, the upper inner wall of the left housing 11, and the mating rib 12 together form the gear oil stirring area; the bottom inner wall of the integrated housing 1, the cover plate 10, and the drain plug 9 together form the motor oil pan area 8. The reducer oil pan area 3 and the motor oil pan area 8 are connected through the reducer oil return hole 4; the oil pump inlet 5 is located on the motor side and is connected to the reducer oil pan area 3 through the reducer oil return hole 4; the oil pump inlet 5 is connected to the inside of the motor through the first motor oil return hole 6 and the second motor oil return hole 7.

[0021] In a specific embodiment, the reducer oil return hole 4 is connected to the oil pump inlet 5, and the lubricating oil inside the reducer can flow to the oil pump inlet 5 through the reducer oil return hole 4.

[0022] In a specific embodiment, the first motor oil return hole 6 and the second motor oil return hole 7 are respectively connected to the oil pump inlet 5, and the lubricating oil inside the motor can flow to the oil pump inlet 5 through the first motor oil return hole 6 and the second motor oil return hole 7.

[0023] In a specific embodiment, the integrated housing 1 and the cover plate 10 are welded by friction stir welding.

[0024] In a specific embodiment, the cover plate 10 and the drain plug 9 are threaded together.

[0025] In a specific embodiment, the gear oil stirring area is formed by the oil-blocking rib 2 and the matching rib 12 enclosing the upper inner wall of the integrated housing 1 and the left housing 11.

[0026] In a specific embodiment, the volume of the gear oil-stirring area is smaller than the volume of the entire housing cavity. In a specific embodiment, the oil pump inlet 5 is located near the first motor return oil hole 6 and the second motor return oil hole 7.

[0027] In a specific implementation, the motor oil pan area 8 is an independent sealed space formed by the bottom inner wall of the integrated housing 1, the cover plate 10 and the drain plug 9, which reduces the height of the motor oil return area.

[0028] In a specific embodiment, the reducer oil return hole 4 connects the reducer oil pan area 3 and the motor oil pan area 8, so that the lubricating oil on the reducer side can flow into the motor side. Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0029] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. An integrated housing structure for a motor reducer, characterized in that, include: Integrated housing (1), oil baffle (2), reducer oil return hole (4), oil pump inlet (5), first motor oil return hole (6), second motor oil return hole (7), drain plug (9), cover plate (10), left housing (11) and matching rib (12); The lower inner wall of the integrated housing (1), the oil baffle (2), the lower inner wall of the left housing (11), and the mating rib (12) together form the reducer oil pan area (3); the upper inner wall of the integrated housing (1), the oil baffle (2), the upper inner wall of the left housing (11), and the mating rib (12) together form the gear oil stirring area; the bottom inner wall of the integrated housing (1), the cover plate (10), and the drain plug (9) together form the motor oil pan area (8); The reducer oil pan area (3) and the motor oil pan area (8) are connected through the reducer oil return hole (4); the oil pump inlet (5) is located on the motor side and is connected to the reducer oil pan area (3) through the reducer oil return hole (4); the oil pump inlet (5) is connected to the inside of the motor through the first motor oil return hole (6) and the second motor oil return hole (7).

2. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The reducer return oil hole (4) is connected to the oil pump inlet (5), and the lubricating oil inside the reducer can flow to the oil pump inlet (5) through the reducer return oil hole (4).

3. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The first motor oil return hole (6) and the second motor oil return hole (7) are respectively connected to the oil pump inlet (5), and the lubricating oil inside the motor can flow to the oil pump inlet (5) through the first motor oil return hole (6) and the second motor oil return hole (7).

4. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The integrated housing (1) and the cover plate (10) are welded by friction stir welding.

5. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The cover plate (10) and the drain plug (9) are threaded together.

6. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The gear oil stirring area is formed by the oil baffle rib (2) and the matching rib (12) enclosing the upper inner wall of the integrated housing (1) and the left housing (11).

7. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The volume of the gear oil-stirring area is smaller than the volume of the entire housing cavity.

8. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The oil pump inlet (5) is located near the first motor return oil hole (6) and the second motor return oil hole (7).

9. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The motor oil pan area (8) is an independent sealed space formed by the bottom inner wall of the integrated housing (1), the cover plate (10) and the drain plug (9), which reduces the height of the motor oil return area.

10. The integrated housing structure for a motor reducer according to claim 1, characterized in that, The reducer oil return hole (4) connects the reducer oil pan area (3) and the motor oil pan area (8) to allow the lubricating oil on the reducer side to flow into the motor side.

Images