Oil guide groove structure of electric drive axle reduction gearbox

Abstract

This utility model provides an oil guide groove structure for an electric drive axle gearbox. The oil guide groove structure includes a gearbox housing and interconnected input shaft mounting positions, intermediate shaft mounting positions, and output shaft mounting positions. The intermediate shaft mounting position is provided with an oil guide groove and a flow guide rib. The oil guide groove is located at the center of the intermediate shaft mounting position, and the flow guide rib is located between the oil guide groove and the output shaft mounting position. The oil guide groove structure of the electric drive axle gearbox provided by this utility model solves the problem of inadequate lubrication in existing products.

Description

Technical Field

[0001] This utility model relates to the field of electric drive axles, specifically to an oil guide groove structure for an electric drive axle gearbox. Background Technology

[0002] The new energy vehicle industry is developing rapidly, and new energy commercial vehicles widely adopt electric drive axle structures to achieve both drive and transmission, offering advantages such as compact structure and high system efficiency. The reduction gearbox in the electric drive axle contains numerous moving parts, placing high demands on the lubrication system.

[0003] Traditional lubrication methods involve splashing lubricating oil onto other parts by rotating the output shaft. For example, the gearbox housing lubrication structure disclosed in utility model publication CN219623211U employs this type of lubrication solution. However, as industry requirements for gearbox lubrication systems increase, a simple splash lubrication solution can no longer meet the lubrication needs of the products. Utility Model Content

[0004] To address the problem of inadequate lubrication in existing products, this utility model provides an oil guide groove structure for an electric drive axle gearbox that solves the aforementioned problem.

[0005] An oil guide groove structure for an electric drive axle gearbox includes a gearbox housing and an input shaft mounting position, an intermediate shaft mounting position, and an output shaft mounting position that are interconnected therein. The intermediate shaft mounting position is provided with an oil guide groove and a flow guide rib. The oil guide groove is located at the center of the intermediate shaft mounting position, and the flow guide rib is located between the oil guide groove and the output shaft mounting position.

[0006] In a preferred embodiment of the oil guide groove structure of the electric drive axle reducer provided by this utility model, an oil inlet groove is provided between the intermediate shaft mounting position and the output shaft mounting position, and the two ends of the guide rib are respectively aligned with the lower edge of the oil guide groove and the oil inlet groove.

[0007] The intermediate shaft mounting position and the oil inlet groove are recessed structures with flush bottom surfaces. The oil inlet groove is located between the top of the intermediate shaft mounting position and the top of the output shaft mounting position. The first end of the oil inlet groove is wider, connecting to the upper part of the output shaft mounting position, and the last end is narrower, connecting to the upper side of the intermediate shaft mounting position, with its lower edge aligned with the guide rib.

[0008] In a preferred embodiment of the oil guide groove structure of the electric drive axle reducer provided by this utility model, the oil guide groove is a circular structure with a notch, the height of which is greater than the height of the guide rib and less than the depth of the intermediate shaft mounting position, and the lower edge of the notch is aligned with the oil guide groove. The center of the oil guide groove is aligned with the center position of the intermediate shaft mounting position.

[0009] In a preferred embodiment of the oil guide groove structure of the electric drive axle reducer provided by this utility model, a retaining edge is provided around the input shaft mounting position, and an oil passage and an oil drain passage are provided between the input shaft mounting position and the output shaft mounting position, penetrating the retaining edge. The oil passage and the oil drain passage are respectively located at the upper and lower parts of the input shaft mounting position, and close to the reducer housing.

[0010] Compared with the prior art, the oil guide groove structure of the electric drive axle reducer provided by this utility model has the following beneficial effects:

[0011] 1. In the solution provided by this utility model, the oil is guided to the oil guide groove by the guide rib. The design of the oil guide groove can guide a certain amount of oil from the front bearing of the intermediate shaft to the rear bearing of the intermediate shaft, so that the intermediate shaft structure is fully lubricated and the product quality and performance are effectively improved.

[0012] 2. In the solution provided by this utility model, the oil in the intermediate shaft position is further guided to the input shaft through the oil passage and the oil drain passage to lubricate the input shaft, so that the transmission system in the entire gearbox is fully lubricated, effectively improving product quality and performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front of the oil guide groove structure of the electric drive axle reduction gearbox;

[0014] Figure 2 This is a schematic diagram of the back of the oil guide groove structure of the electric drive axle reduction gearbox;

[0015] Figure 3 This is a structural schematic diagram of the gearbox housing.

[0016] The following are labeled in the diagram: Gearbox housing 1, Input shaft mounting position 21, Side flange 22, Oil passage 23, Oil drain passage 24, Intermediate shaft mounting position 31, Intermediate gear 32, Oil guide groove 33, Drainage rib 34, Output shaft mounting position 41, Output gear 42, Oil inlet groove 43. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please also refer to Figures 1 to 3 ,in Figure 1 and Figure 2 These are schematic diagrams of the oil guide groove structure of the electric drive axle reducer provided by this utility model from two different perspectives. Figure 3 This is a schematic diagram of the gearbox housing structure within the oil guide groove structure of the electric drive axle gearbox.

[0019] The oil guide groove structure of the electric drive axle gearbox includes a gearbox housing 1, an end cover, and an oil tank (not shown in the attached diagram). The end cover is connected to the gearbox housing 1 from the front, and the enclosed area between the two has an input shaft mounting position 21 and an intermediate shaft mounting position 31. The oil tank is connected to the gearbox housing 1 from the right side, and the enclosed area between the two has an output shaft mounting position 41.

[0020] To facilitate understanding of the equipment structure, the intermediate gear 32 is retained at the intermediate shaft mounting position 31, and the output gear 42 is retained at the output shaft mounting position 41.

[0021] The input shaft mounting position 21 is a through structure, with a retaining edge 22 along its edge that is higher than the bottom surface of the gearbox housing 1. An oil passage 23 penetrating the retaining edge 22 is provided at the upper part of the input shaft mounting position 21, close to the inner wall of the gearbox housing 1; an oil drain passage 24 penetrating the retaining edge 22 is also provided at the upper part of the input shaft mounting position 21, close to the inner wall of the gearbox housing 1.

[0022] The intermediate shaft mounting position 31 is a recessed structure, and correspondingly, the gearbox housing 1 also protrudes outward from the intermediate shaft mounting position 31. An oil guide groove 33 is provided at the center of the intermediate shaft mounting position 31. The oil guide groove 33 is a circular structure with a notch, its height approximately half the depth of the intermediate shaft mounting position 31, and the notch is located at the upper right corner. Starting from the lower edge of the notch in the oil guide groove 33, a guide rib 34 extends in a straight line towards the upper right corner. The guide rib 34 has a small height and only slightly protrudes.

[0023] The output shaft mounting position 41 is a split bearing housing structure. An oil inlet groove 43 is provided between the cavity area where the output shaft mounting position 41 is located and the intermediate shaft mounting position 31. The oil inlet groove 43 is a recessed structure, and correspondingly, the gearbox housing 1 also protrudes outward from the oil inlet groove 43. The end of the oil inlet groove 43 near the intermediate shaft mounting position 31 is narrower, and the end near the output shaft mounting position 41 is wider. One end of the guide rib 34 is aligned with the lower edge of the notch in the guide groove 33, and the other end is aligned with the lower edge of the oil inlet groove 43.

[0024] Lubricating oil is stored in the lower part of the oil tank. In this structure, as the output gear 42 rotates counterclockwise, the oil is thrown upwards along the tank wall to the oil inlet groove 43, and continues along the guide rib 34 to the guide groove 33, lubricating the front bearing of the intermediate shaft. The guide groove 33 is located at the center of the intermediate shaft mounting position and can align with the central shaft hole, guiding the oil towards the end cover to lubricate the rear bearing of the intermediate shaft. Part of the oil at the front of the intermediate shaft enters the output shaft mounting position 21 through the oil passage 23 to lubricate the input shaft, and finally returns to the oil tank through the oil drain channel 24. The end cover can also have a structure similar to the oil passage 23 and oil drain channel 24, allowing part of the oil at the rear of the intermediate shaft to also enter the output shaft mounting position 21 for sufficient lubrication of the input shaft.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An oil guide groove structure of an electric drive axle reduction gearbox, comprising a reduction gearbox housing, and an input shaft mounting position, an intermediate shaft mounting position and an output shaft mounting position which are interconnected therein, characterized in that: The intermediate shaft mounting position is provided with an oil guide groove and a flow guide rib. The oil guide groove is located at the center of the intermediate shaft mounting position, and the flow guide rib is located between the oil guide groove and the output shaft mounting position.

2. The oil guide groove structure of the electric drive axle reducer according to claim 1, characterized in that: An oil inlet groove is provided between the intermediate shaft mounting position and the output shaft mounting position, and the two ends of the guide rib are respectively aligned with the lower edge of the guide groove and the oil inlet groove.

3. The oil guide groove structure of the electric drive axle reducer according to claim 2, characterized in that: The intermediate shaft mounting position and the oil inlet groove are recessed structures with flush bottom surfaces. The oil inlet groove is located between the top of the intermediate shaft mounting position and the output shaft mounting position.

4. The oil guide groove structure of the electric drive axle reducer according to claim 3, characterized in that: The oil inlet groove is wider at the front end, connecting to the upper part of the output shaft mounting position, and narrower at the rear end, connecting to the upper side of the intermediate shaft mounting position, with its lower edge aligned with the drain rib.

5. The oil guide groove structure of the electric drive axle reduction gearbox according to claim 4, characterized in that: The oil guide groove is a circular structure with a notch, and its height is greater than the height of the guide rib but less than the depth of the intermediate shaft mounting position. The lower edge of the notch is aligned with the oil guide groove.

6. The oil guide groove structure of the electric drive axle reduction gearbox according to claim 5, characterized in that: The center of the oil guide groove is aligned with the center of the intermediate shaft mounting position.

7. The oil guide groove structure of the electric drive axle reduction gearbox according to claim 1, characterized in that: The input shaft mounting position is surrounded by a retaining edge, and an oil passage and an oil drain passage are provided between the input shaft mounting position and the output shaft mounting position, passing through the retaining edge.

8. The oil guide groove structure of the electric drive axle reduction gearbox according to claim 7, characterized in that: The oil passage and the oil drain passage are respectively located at the upper and lower parts of the input shaft mounting position, and close to the gearbox housing.

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