Oil baffle plate with oil blocking and guiding functions

Abstract

The utility model discloses an oil baffle plate with oil blocking and guiding functions, which comprises a body made of PA66 + GF30 composite materials, and the body is provided with an arc-shaped enveloping structure used for enveloping a gear rotating at a high speed. The 1215 free-cutting steel lining is embedded into the body, and the lining and the body are integrally formed through injection molding; the positioning pin and the body are made of the same material and integrally formed through injection molding and used for assembling and positioning. The positioning pin structure is used for positioning, the bush is matched with the fixing bolt for assembly, the arc-shaped structure envelopes the gear, oil liquid is guided, and meanwhile external oil liquid is prevented from entering the arc-shaped structure.

Description

Technical Field

[0001] This utility model belongs to the field of electric drive assembly technology, and in particular relates to an oil baffle plate with oil blocking and oil guiding functions. Background Technology

[0002] In the current mainstream design of electric drive axles for commercial vehicles, the gear transmission system of the reducer, as the core power transmission component, typically relies on splash lubrication within the oil pan for lubrication and cooling. A typical characteristic of this structure is the lack of targeted oil-blocking or guiding structures in the oil-churning area for the large gear ring (such as the driven gear of the main reducer) or high-speed rotating gear that performs the main reduction function. This design has little impact when the vehicle is running at low speeds, but when the motor-driven gears enter high-speed rotational conditions (typically corresponding to high-speed driving or rapid acceleration), the circumferential velocity of the gear pair increases significantly, leading to a series of dynamic problems.

[0003] The high-speed rotating gears act like impellers, directly agitating the lubricating oil in the oil pan, creating a large-scale oil vortex and splash. This unrestrained churning motion leads to three negative effects: First, fluid resistance increases dramatically, requiring the gears to overcome greater viscous resistance, resulting in energy loss and a direct decrease in the mechanical efficiency of the reducer. Second, frictional heat generation intensifies; the intense friction between the oil and the gears, housing, and air causes the oil temperature to rise rapidly. Excessively high temperatures further reduce the viscosity of the lubricating oil, weakening its lubrication effect and creating a vicious cycle. Third, current electric drive axles lack baffle structures, allowing the oil to easily tumble and churn with the high-speed gear rotation. Besides generating significant amounts of ineffective heat and causing oil loss, the high-speed agitation also easily produces air bubbles. These bubbles can cause air suction in filters equipped with forced lubrication structures, not only compromising the lubrication reliability of critical components such as bearings and gears but also potentially leading to dry friction between metal parts due to lubrication failure, generating harsh high-frequency noise and severely impacting the driving experience and system lifespan.

[0004] This design flaw contradicts the trend towards higher efficiency and lighter weight in commercial vehicle electric drive axles. On one hand, the stringent range requirements of new energy commercial vehicles are forcing improvements in transmission system efficiency; on the other hand, the lubrication design concepts of the traditional fuel vehicle era have not fully considered the high-speed, wide-range operating characteristics of electric drive systems, resulting in insufficient matching between the lubrication system and transmission components. Of particular concern is that the oil foaming, lubrication blind spots, and noise problems caused by this uncontrolled oil churning phenomenon have become key bottlenecks restricting the improvement of electric drive axle reliability. Summary of the Invention

[0005] The purpose of this invention is to provide an oil baffle plate with oil blocking and oil guiding functions, which solves the problem of oil in the large cavity of the electric drive bridge tumbling and agitating with the rotation of the gears, reduces the generation of ineffective heat, and improves the lubrication performance of the oil.

[0006] The technical solution adopted in this utility model is as follows: an oil baffle with oil blocking and oil guiding functions, including a body made of PA66+GF30 composite material, the body having an arc-shaped enveloping structure for enveloping a high-speed rotating gear; a 1215 free-cutting steel bushing embedded in the body, the bushing being integrally formed with the body by injection molding; and a positioning pin integrally injection molded with the same material as the body for assembly positioning.

[0007] Furthermore, the body is composed of a first surface, a second surface, a third surface, and a fourth surface, wherein the first surface and the second surface are perpendicularly connected, the third surface is perpendicularly connected to both the first surface and the second surface, and the fourth surface is parallel to the first surface and connected to the third surface.

[0008] Furthermore, reinforcing ribs are provided between the first curved surface and the second curved surface, between the first curved surface and the third curved surface, and between the second curved surface and the third curved surface.

[0009] Furthermore, the first curved surface and the third curved surface are respectively provided with a first bushing seat and a second bushing seat, and the first bushing seat and the second bushing seat both protrude in the same direction.

[0010] Furthermore, the bushing is disposed on the first bushing seat and the second bushing seat to bear the bolt preload and avoid direct action on the body.

[0011] Furthermore, the positioning pins are respectively disposed in the protruding direction of the first bushing seat and the second bushing seat.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a positioning pin structure for positioning, and a bushing is assembled with a fixing bolt. The arc-shaped structure envelops the gear, which guides the oil and prevents external oil from entering the arc-shaped structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front structure of the present invention. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the front structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a schematic diagram of the reverse side structure of this utility model;

[0016] In the figure: 1-body, 101-first curved surface, 102-second curved surface, 103-third curved surface, 104-fourth curved surface, 2-bulb, 201-first bushing seat, 202-second bushing seat, 3-locating pin, 4-reinforcing rib. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1 to 3 As shown, this utility model is an oil baffle with oil blocking and oil guiding functions, including a body 1, a bushing 2 and a positioning pin 3.

[0019] The body 1, made of PA66+GF30 composite material, includes a first curved surface 101, a second curved surface 102, a third curved surface 103, and a fourth curved surface 104. The first curved surface 101 and the second curved surface 102 are perpendicularly connected. The third curved surface 103 is perpendicularly connected to both the first curved surface 101 and the second curved surface 102. The fourth curved surface 104 is parallel to the first curved surface 101 and connected to the third curved surface 103. The four curved surfaces together form an arc-shaped envelope structure for enveloping the high-speed rotating gear.

[0020] To meet the mechanical and thermal performance requirements of different applications, the amount of glass fiber in PA66+GF30 composite materials can be increased or decreased.

[0021] Reinforcing ribs 4 are provided between the first curved surface 101 and the second curved surface 102, between the first curved surface 101 and the third curved surface 103, and between the second curved surface 102 and the third curved surface 103 to improve the overall strength of the oil baffle.

[0022] A first bushing seat 201 and a second bushing seat 202 are respectively provided on the first curved surface 101 and the third curved surface 103 of the main body 1, and both the first bushing seat 201 and the second bushing seat 202 protrude in the same direction. The bushing 2, made of 1215 free-cutting steel, is embedded in the first bushing seat 201 and the second bushing seat 202 and is integrally formed with the main body 1 by injection molding. It is used to bear the bolt preload and avoid direct action on the main body 1.

[0023] The positioning pin 3 is made of the same material as the body 1, and is respectively set next to the bushing 2 in the protruding direction of the first bushing seat 201 and the second bushing seat 202, and is integrally injection molded with the body 1 for assembly positioning. PA66+GF30 composite material has the advantages of light weight and low cost.

[0024] During assembly, this utility model utilizes the positioning pin 3 for positioning and is assembled using the fixing bolts at the bushing 2. The arc-shaped structure of the main body 1 envelops the gear, which not only prevents oil from entering the gear's vicinity from the large cavity of the gearbox but also guides the oil inside the oil baffle to flow along the structural direction. This reduces the increased oil churning losses and ineffective heat generation caused by the gear stirring a large amount of oil, thus avoiding a decrease in the overall efficiency of the reducer.

[0025] In addition, the bushing 2 and the locating pin 3 can be adjusted in position and structure according to different occasions, while the arc-shaped structure formed by the PA66+GF30 composite material body 1 can be adjusted according to different box structures and gear positions.

Claims

1. An oil baffle plate with oil blocking and oil guiding functions, characterized in that, include: The body (1) is made of PA66+GF30 composite material and has an arc-shaped enveloping structure for enveloping a high-speed rotating gear; A 1215 free-cutting steel bushing (2) is embedded in the body (1), and the bushing (2) and the body (1) are integrally formed by injection molding; The positioning pin (3) is integrally injection molded from the same material as the body (1) and is used for assembly positioning.

2. The oil baffle plate with oil blocking and oil guiding functions according to claim 1, characterized in that: The body (1) is composed of a first surface (101), a second surface (102), a third surface (103) and a fourth surface (104), wherein the first surface (101) and the second surface (102) are perpendicularly connected, the third surface (103) is perpendicularly connected to the first surface (101) and the second surface (102) respectively, and the fourth surface (104) is parallel to the first surface (101) and connected to the third surface (103).

3. An oil baffle plate with oil blocking and oil guiding functions according to claim 2, characterized in that: Reinforcing ribs (4) are provided between the first curved surface (101) and the second curved surface (102), between the first curved surface (101) and the third curved surface (103), and between the second curved surface (102) and the third curved surface (103).

4. An oil baffle plate with oil blocking and oil guiding functions according to claim 2, characterized in that: The first curved surface (101) and the third curved surface (103) are respectively provided with a first bushing seat (201) and a second bushing seat (202), and the first bushing seat (201) and the second bushing seat (202) both protrude in the same direction.

5. An oil baffle plate with oil blocking and oil guiding functions according to claim 1, characterized in that: The bushing (2) is disposed on the first bushing seat (201) and the second bushing seat (202) to bear the bolt preload and avoid direct action on the body (1).

6. An oil baffle plate with oil blocking and oil guiding functions according to claim 1, characterized in that: The positioning pins (3) are respectively set in the protruding direction of the first bushing seat (201) and the second bushing seat (202).

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