Electric drive decelerator oil guide structure

Abstract

The embodiment of the application provides an oil guide structure of an electric drive speed reducer, which comprises an oil guide plate, the oil guide plate being installed between a rear end cover of the speed reducer and a speed reducer shell; the oil guide plate comprises an oil receiving plate, a first flow guide plate and a second flow guide plate; the first flow guide plate and the second flow guide plate are fixedly connected with the oil receiving plate, the oil receiving plate is opposite to a crown wheel of the speed reducer, the first flow guide plate is used for guiding gear oil on the oil receiving plate to a bearing of the rear end cover, and the second flow guide plate is used for guiding the gear oil on the oil receiving plate to a bearing and an oil seal at the speed reducer shell. The application can improve the lubricating oil flow of an input shaft bearing and an oil seal, and reduce the risk of bearing ablation and oil seal wear caused by lack of oil.

Description

Technical Field

[0001] This application relates to the field of automotive component technology, and in particular to an oil guide structure for an electric drive reducer. Background Technology

[0002] Pure electric commercial vehicles are typically rear-wheel drive, with the electric drive reducer integrated into the electric drive axle. Oil is distributed within the reducer housing and at the bottom of the electric drive axle housing. The reducer gears, bearings, and oil seals are primarily lubricated by splashed gear oil. Due to space constraints and a compact integrated structure, during operation, most of the gear oil agitated by the reducer's crown wheel is blocked by the rear axle housing. The reducer input shaft is far from the oil level, resulting in insufficient lubrication for the input shaft bearings and oil seals, making it a severely oil-deficient area. Electric vehicles have rapid power response, high torque surges, and high motor speeds. When the reducer operates under continuous high-speed or high-torque conditions, insufficient lubrication of the reducer input shaft bearings and oil seals prevents the effective and rapid dissipation of the large amount of heat generated by mechanical friction. This can lead to burn-out and oil leaks in the input shaft bearings and oil seals, ultimately causing reducer failure.

[0003] Therefore, improving the lubrication of input shaft bearings and oil seals is one of the urgent problems to be solved in this field. Utility Model Content

[0004] This application proposes an oil guiding structure for an electric drive reducer, which relates to the field of automotive component technology. It can improve the lubricating oil flow of the input shaft bearing and oil seal, and reduce the risk of bearing burnout and oil seal wear due to lack of oil.

[0005] This application provides an oil guiding structure for an electric drive reducer, including an oil guiding plate installed between the rear end cover and the reducer housing. The oil guiding plate includes an oil receiving plate, a first diverting plate, and a second diverting plate. The first diverting plate and the second diverting plate are both fixedly connected to the oil receiving plate. The oil receiving plate is opposite to the crown wheel of the reducer. The first diverting plate is used to guide the gear oil on the oil receiving plate to the bearing of the rear end cover, and the second diverting plate is used to guide the gear oil on the oil receiving plate to the bearing and oil seal of the reducer housing.

[0006] Optionally, the first drain plate and the second drain plate are both disposed at one end of the oil receiving plate, and are respectively disposed on one opposite side of the oil receiving plate; the oil receiving plate has an oil receiving surface, the first drain plate has a first drain surface, and the second drain plate has a second drain surface, and the first drain surface and the second drain surface are both connected to the oil receiving surface.

[0007] Optionally, the first drainage surface and the oil receiving surface have a slope.

[0008] Optionally, the slope angle between the first drainage surface and the oil receiving surface is in the range of 5° to 8°.

[0009] Optionally, the end of the first drain plate away from the oil receiving plate is located at the first drain notch on the rear end cover, and the first drain notch communicates with the bearing mounting hole on the rear end cover.

[0010] Optionally, one end of the second drain plate away from the oil receiving plate is located at the second drain notch on the reducer housing, and the second drain notch communicates with the bearing mounting hole on the reducer housing.

[0011] Optionally, the oil receiving plate is provided with a first limiting post on the side near the rear end cover, and the rear end cover is provided with a first fixing hole opposite to the first limiting post; the oil receiving plate is provided with a second limiting post on the side near the reducer housing, and the reducer housing is provided with a second fixing hole opposite to the second limiting post.

[0012] Optionally, there are two first limiting posts; there are two second limiting posts.

[0013] Optionally, a reinforcing structure is also included, the reinforcing structure comprising a first reinforcing plate and a second reinforcing plate, one end of the first reinforcing plate being fixedly connected to the oil receiving plate, and the first reinforcing plate being arranged parallel to the second draining plate; the second reinforcing plate being arranged parallel to the oil receiving plate, one end of the second reinforcing plate being fixedly connected to the second draining plate, and the other end being fixedly connected to the end of the first reinforcing plate away from the oil receiving plate; and a second limiting post being disposed on the second reinforcing plate.

[0014] Optionally, the second reinforcing plate is provided with a folded edge, and the second limiting post is disposed on the folded edge.

[0015] This application adds an oil guide plate inside the reducer. During reducer operation, the crown wheel agitates and splashes oil, which lands on the oil receiving plate of the guide plate. The oil is then guided through a first guide plate to the bearing at the rear end cover for lubrication, and through a second guide plate to the bearing and oil seal at the reducer housing for lubrication. This increases the lubricating oil flow to the bearings and oil seals, significantly reducing the risk of bearing burn-out and oil seal wear due to insufficient lubrication. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the oil guiding structure of the electric drive reducer provided in the embodiment of this application from a first-view perspective; Figure 2 A schematic diagram of the oil guiding structure of the electric drive reducer provided in the embodiment of this application from a second perspective; Figure 3 A schematic diagram of the oil guiding structure of the electric drive reducer provided in the embodiment of this application from a third-view perspective; Figure 4 This is a schematic diagram of the rear end cover structure; Figure 5 This is a schematic diagram of the reducer housing. Figure 6 This is a schematic diagram of the installation structure of the oil guide plate, the rear end cover, and the reducer housing.

[0018] Explanation of reference numerals in the attached figures: 1-Oil receiving plate, 2-First flow guide plate, 3-Second flow guide plate, 4-Rear end cover, 5-Reducer housing, 6-Crown wheel, 7-First flow guide notch, 8-Second flow guide notch, 9-First limiting post, 10-First fixing hole, 11-Oil receiving surface, 12-Second limiting post, 13-Second fixing hole, 14-First reinforcing plate, 15-Second reinforcing plate, 16-Folded edge, 21-First flow guide surface, 31-Second flow guide surface. Detailed Implementation

[0019] To better understand the technical solutions in this specification, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] It should be understood that the described embodiments are merely some, not all, of the embodiments in this specification. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without inventive effort are within the scope of protection of this specification.

[0021] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] The technical solutions protected by the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0023] Please see Figures 1-6As shown in the figure, an oil guiding structure for an electric drive reducer provided in this application embodiment includes an oil guiding plate, which is installed between the rear end cover 4 and the reducer housing 5. The oil guiding plate includes an oil receiving plate 1, a first diverting plate 2, and a second diverting plate 3. The first diverting plate 2 and the second diverting plate 3 are both fixedly connected to the oil receiving plate 1, and are respectively disposed at one end of the oil receiving plate 1 and on opposite sides of the oil receiving plate 1. The oil receiving plate 1 is opposite to the crown wheel 6 of the reducer and is used to receive the gear oil stirred and thrown out by the crown wheel 6 during the operation of the reducer. The first diverting plate 2 is used to introduce the gear oil on the oil receiving plate 1 into the bearing of the rear end cover 4 for lubrication of the bearing, and the second diverting plate 3 is used to introduce the gear oil on the oil receiving plate 1 into the bearing and oil seal of the reducer housing 5 for lubrication of the bearing and oil seal. The oil receiving plate 1 has an oil receiving surface 11, the first guide plate 2 has a first guide surface 21, and the second guide plate 3 has a second guide surface 31. Both the first guide surface 21 and the second guide surface 31 are connected to the oil receiving surface 11. In actual use, after the guide plates are installed, the oil receiving surface 11 faces the crown wheel 6, facilitating the collection of gear oil splashed out by the agitation of the crown wheel 6. The gear oil splashes onto the oil receiving surface 11 and flows along... Figure 2 The flow is directed towards the first drainage surface 21 and the second drainage surface 31, respectively. The flow then flows from the first drainage surface 21 into the bearing of the rear end cover 4, and from the second drainage surface 31 into the bearing and oil seal of the reducer housing 5.

[0024] The first drainage plate 2 and the second drainage plate 3 are offset.

[0025] The first drainage surface 21 and the oil receiving surface 11 have a slope. This arrangement facilitates the flow of gear oil from the oil receiving surface 11 into the first drainage surface 21, and also facilitates the flow of lubricating oil from the first drainage surface 21 into the bearing of the corresponding rear end cover 4. The slope angle between the first drainage surface 21 and the oil receiving surface 11 ranges from 5° to 8°.

[0026] The rear cover 4 has a first drainage notch 7, which consists of two... Figure 4 As shown, the two first drainage notches 7 are respectively connected to the two bearing mounting holes. During installation, the end of the first drainage plate 2 away from the oil receiving plate 1 is located at the first drainage notch 7.

[0027] The reducer housing 5 has a second drainage notch 8, which consists of two... Figure 5 As shown, the two second drainage notches 8 are respectively connected to the two bearing mounting holes on the reducer housing 5. During installation, the end of the second drainage plate 3 away from the oil receiving plate 1 is located at the second drainage notch 8 on the reducer housing 5.

[0028] To facilitate the installation of the oil guide plate between the rear end cover 4 and the reducer housing 5, the following measures are adopted: A first limiting post 9 is provided on the side of the oil receiving plate 1 near the rear end cover 4, and a first fixing hole 10 is provided on the rear end cover 4 opposite to the first limiting post 9; a second limiting post 12 is provided on the side of the oil receiving plate 1 near the reducer housing 5, and a second fixing hole 13 is provided on the reducer housing 5 opposite to the second limiting post 12. The installation of the oil guide plate can be quickly achieved through the cooperation of the first limiting post 9 with the first fixing hole 10 and the second limiting post 12 with the second fixing hole 13. To further improve the stability of the oil guide plate after installation and prevent displacement during reducer operation, two first limiting posts 9 and two second limiting posts 12 are provided.

[0029] The system also includes a reinforcing structure, comprising a first reinforcing plate 14 and a second reinforcing plate 15. One end of the first reinforcing plate 14 is fixedly connected to the oil receiving plate 1, and the first reinforcing plate 14 is arranged parallel to the second drainage plate 3. The second reinforcing plate 15 is arranged parallel to the oil receiving plate 1, with one end fixedly connected to the second drainage plate 3 and the other end fixedly connected to the end of the first reinforcing plate 14 away from the oil receiving plate 1. A second limiting post 12 is disposed on the second reinforcing plate 15. By setting the first reinforcing plate 14 and the second reinforcing plate 15, the connection strength between the second drainage plate 3 and the oil receiving plate 1 can be improved. At the same time, it can provide an installation position for the second limiting post 12, avoiding poor stability of the entire oil guide plate after installation due to the excessive length of the second limiting post 12. Setting the first reinforcing plate 14 and the second reinforcing plate 15 instead of setting a single reinforcing plate fixedly connected to both the oil receiving plate 1 and the second drainage plate 3 can reduce the weight of the entire oil guide plate.

[0030] To further facilitate the fixing of the second limiting post 12, a folded edge 16 is provided on the second reinforcing plate 15, and the second limiting post 12 is set on the folded edge 16.

[0031] This application adds an oil guide plate inside the reducer. During reducer operation, the crown wheel agitates and splashes oil, which lands on the oil receiving plate of the guide plate. The oil is then guided through a first guide plate to the bearing at the rear end cover for lubrication, and through a second guide plate to the bearing and oil seal at the reducer housing for lubrication. This increases the lubricating oil flow to the bearings and oil seals, significantly reducing the risk of bearing burn-out and oil seal wear due to insufficient lubrication.

[0032] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. An oil guiding structure for an electric drive reducer, characterized in that, The device includes an oil guide plate, which is installed between the rear end cover (4) of the reducer and the reducer housing (5). The oil guide plate includes an oil receiving plate (1), a first diverting plate (2), and a second diverting plate (3). The first diverting plate (2) and the second diverting plate (3) are both fixedly connected to the oil receiving plate (1). The oil receiving plate (1) is opposite to the crown wheel (6) of the reducer. The first diverting plate (2) is used to introduce the gear oil on the oil receiving plate (1) into the bearing of the rear end cover (4). The second diverting plate (3) is used to introduce the gear oil on the oil receiving plate (1) into the bearing and oil seal of the reducer housing (5).

2. The oil guiding structure of the electric drive reducer according to claim 1, characterized in that, The first drain plate (2) and the second drain plate (3) are both disposed at one end of the oil receiving plate (1) and respectively disposed on one opposite side of the oil receiving plate (1); the oil receiving plate (1) has an oil receiving surface (11), the first drain plate (2) has a first drain surface (21), and the second drain plate (3) has a second drain surface (31). The first drain surface (21) and the second drain surface (31) are both connected to the oil receiving surface (11).

3. The oil guiding structure of the electric drive reducer according to claim 2, characterized in that, There is a slope between the first drainage surface (21) and the oil receiving surface (11).

4. The oil guiding structure of the electric drive reducer according to claim 3, characterized in that, The slope angle between the first drainage surface (21) and the oil receiving surface (11) is in the range of 5°~8°.

5. The oil guiding structure of the electric drive reducer according to claim 2, characterized in that, The end of the first drain plate (2) away from the oil receiving plate (1) is located at the first drain notch (7) on the rear end cover (4), and the first drain notch (7) is connected to the bearing mounting hole on the rear end cover (4).

6. The oil guiding structure of the electric drive reducer according to claim 2, characterized in that, The end of the second drain plate (3) away from the oil receiving plate (1) is located at the second drain notch (8) on the reducer housing (5), and the second drain notch (8) is connected to the bearing mounting hole on the reducer housing (5).

7. The oil guiding structure of the electric drive reducer according to claim 1, characterized in that, The oil receiving plate (1) is provided with a first limiting post (9) on the side near the rear end cover (4), and the rear end cover (4) is provided with a first fixing hole (10) opposite to the first limiting post (9); the oil receiving plate (1) is provided with a second limiting post (12) on the side near the reducer housing (5), and the reducer housing (5) is provided with a second fixing hole (13) opposite to the second limiting post (12).

8. The oil guiding structure of the electric drive reducer according to claim 7, characterized in that, There are two first limiting posts (9); there are two second limiting posts (12).

9. The oil guiding structure of the electric drive reducer according to claim 8, characterized in that, It also includes a reinforcing structure, which includes a first reinforcing plate (14) and a second reinforcing plate (15). One end of the first reinforcing plate (14) is fixedly connected to the oil receiving plate (1), and the first reinforcing plate (14) is arranged parallel to the second draining plate (3). The second reinforcing plate (15) is arranged parallel to the oil receiving plate (1), and one end of the second reinforcing plate (15) is fixedly connected to the second draining plate (3), and the other end is fixedly connected to the end of the first reinforcing plate (14) away from the oil receiving plate (1). The second limiting post (12) is arranged on the second reinforcing plate (15).

10. The oil guiding structure of the electric drive reducer according to claim 9, characterized in that, The second reinforcing plate (15) is provided with a folded edge (16), and the second limiting post (12) is provided on the folded edge (16).

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