Oil baffle cover structure for commercial drive axle

Abstract

The utility model relates to an oil baffle cover structure for a commercial drive axle, and belongs to the technical field of automobiles. The axle comprises an axle housing capable of containing gear oil, a driven gear and a pair of bearing seats are arranged in the axle housing, and the driven gear is located between the pair of bearing seats. An oil blocking cover is fixedly arranged in the axle housing and located on one side of the rotating direction of the driven gear, the rotating direction of the driven gear corresponds to the advancing direction of an automobile, and a certain gap is formed between the inner wall of the oil blocking cover and the edge of the peripheral side of the driven gear. When the driven gear rotates, the oil blocking cover prevents the driven gear from carrying excessive gear oil. According to the drive axle, the gear oil quantity carried by the driven gear can be effectively reduced, the oil stirring power of the driven gear is reduced, then power loss is reduced, meanwhile, the oil blocking cover can reduce splashing of redundant oil liquid, the blocked gear oil is guided to the position close to the driven gear to lubricate moving parts, and the requirement for lubrication in the drive axle is met; the oil blocking cover is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to an oil shield structure for a commercial drive axle. Background Art

[0002] With the rapid development of society and technology, people's material demands are becoming increasingly demanding. The automotive industry, a long-established industry, faces both significant challenges and opportunities, and the market demand for improved transmission efficiency is growing stronger. As a key component of the vehicle's power transmission system, the drive axle plays a crucial role in transmission efficiency. The drive axle is responsible for distributing torque and speed transmitted by the drive shaft or motor to the left and right drive wheels, thereby driving the vehicle. During vehicle operation, the drive axle changes transmission direction, increasing torque and reducing speed through the meshing of the driving and driven gears. The differential planetary gears also achieve differential rotation between the left and right wheel ends. These factors directly impact the vehicle's power output, necessitating higher transmission efficiency requirements. Currently, a common approach to improving transmission efficiency is to enhance the precision of meshing gears and bearing installation. However, this approach results in relatively high component costs and minimal efficiency gains. This approach is clearly unsuitable for cost-effective drive axles, especially given the rising costs of drive axle components.

[0003] The inventors have found that the stirring of lubricating oil by the passive gear will cause a certain amount of power loss. By reducing this power loss, the transmission efficiency of the drive axle can be improved. A search revealed that a dynamic liquid level management structure with publication number CN117301764A can improve the transmission efficiency of the drive axle, including a drive axle, a drive gear, an oil storage chamber, a bridge pack, a bridge housing, and an oil baffle. By designing a two-level oil storage structure on the bridge housing of the drive axle, the dynamic oil storage function of the drive axle oil storage chamber is realized, and the purpose of dynamically adjusting the oil level of the bridge pack gear at different vehicle speeds is achieved. The oil stirring power consumption of the drive axle under normal working conditions can be effectively reduced while ensuring the lubrication of the key parts of the drive axle, thereby significantly improving the transmission efficiency of the drive axle. However, the structure is relatively complex as a whole, with many parts and components, and the overall cost is still relatively high, making it unsuitable for use in economical drive axles.

[0004] Therefore, how to reduce the power loss of the passive gear stirring the lubricating oil and improve the transmission efficiency of the drive axle at a lower cost has become an urgent problem to be solved. Utility Model Content

[0005] In order to reduce the power loss caused by the passive gear stirring the lubricating oil and improve the transmission efficiency of the drive axle, the utility model provides an oil shield structure for a commercial drive axle. Without hindering the normal operation of the transmission system, the gap of the oil shield is used to wrap the outer surface of the passive gear to prevent excess oil from splashing, reduce the power loss caused by the passive gear stirring the oil, and improve the transmission efficiency of the drive axle at a lower cost.

[0006] It adopts the following technical solutions:

[0007] An oil shield structure for a commercial drive axle includes an axle housing capable of containing gear oil, wherein a driven gear and a pair of bearing seats are provided in the axle housing, with the driven gear located between the pair of bearing seats; an oil shield is fixedly provided in the axle housing, the oil shield being located on one side of the rotation direction of the driven gear, the rotation direction of the driven gear corresponding to the forward direction of the vehicle, and a certain gap being formed between the inner wall of the oil shield and the peripheral edge of the driven gear; when the driven gear rotates, the oil shield prevents the driven gear from carrying excessive gear oil.

[0008] Furthermore, the oil shield includes an arc-shaped plate arranged along the peripheral contour of the passive gear, and side wing plates extending from both sides of the arc-shaped plate in the width direction, with the free end of each side wing plate close to the direction of the passive gear.

[0009] Furthermore, the two side wing plates are respectively provided with mounting brackets, the mounting brackets are provided with a first mounting hole, the bearing seat has a second mounting hole, and the first and second mounting holes connect the oil shield and the bearing seat in the bridge housing through common bolts.

[0010] Furthermore, a group of vertically arranged drainage grooves are provided on the inner side surfaces of the arc-shaped plate and the side wing plate.

[0011] Furthermore, the gap between the inner wall of the oil shield and the peripheral edge of the driven gear is 3-5 mm.

[0012] Furthermore, the lower end portion of the oil shield is located below the gear oil level when the drive axle is running.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This device provides an oil shield and sets the oil shield on one side of the rotation direction of the driven gear, which can effectively reduce the amount of gear oil carried by the driven gear, reduce the oil stirring power of the driven gear, and thus reduce power loss. At the same time, the oil shield can reduce excess oil splashing, and guide the blocked gear oil to the vicinity of the driven gear to lubricate the moving parts, meet the lubrication needs inside the drive axle, and reduce the gear oil demand in the drive axle. In addition, the oil shield has a simple structure and a low production cost. Overall, this structure can improve the transmission efficiency of the drive axle at a lower cost.

[0015] The oil shield is configured as an arc-shaped plate arranged along the contour of the circumferential surface of the passive gear, and side wing plates extending from both sides of the width direction of the arc-shaped plate. This can improve the covering effect of the oil shield on the circumferential edge of the passive gear, further reduce the amount of oil splashing from the passive gear, reduce the gear oil demand in the drive axle, and improve the economic efficiency of the drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an oil shield structure for a commercial drive axle according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure in the AA direction;

[0018] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0019] Figure 4 It is a schematic diagram of the oil shield in the embodiment of the present utility model.

[0020] Explanation of the accompanying drawings: 1. Bridge housing; 2. Accommodating cavity; 3. Passive gear; 4. Bearing seat; 5. Oil shield; 51. Arc plate; 52. Side wing plate; 53. Mounting bracket; 54. First mounting hole; 55. Drainage groove. DETAILED DESCRIPTION

[0021] In order to make the present invention more clear, the oil shield structure for a commercial drive axle of the present invention is further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0022] like Figures 1 to 4As shown, an oil shield structure for a commercial drive axle comprises a metal axle housing 1 having a cavities 2 within the axle housing 1. The cavities 2 are filled with gear oil. A driven gear 3 and a pair of bearing seats 4 are also located within the cavities 2. The driven gear 3 is positioned between the two bearing seats 4. The pair of bearing seats 4 are fixedly connected to the interior of the axle housing 1 by fasteners, and are used to rotate the half-shaft transmission structure connected on both sides. An oil shield 5 is also fixedly installed within the axle housing 1. The oil shield 5 is located on one side of the rotation direction of the driven gear 3. It should be noted that the rotation direction of the driven gear 3 corresponds to the forward direction of the vehicle. A certain gap is formed between the inner wall of the oil shield 5 and the peripheral edge of the driven gear 3. This gap prevents interference between the oil shield 5 and the driven gear 3 while allowing a small amount of lubricating oil to pass through. When the driven gear 3 rotates, the oil shield 5 prevents the driven gear 3 from carrying excessive gear oil through this gap, thereby reducing the oil stirring power of the driven gear and, in turn, reducing power loss, thereby improving the transmission efficiency of the drive axle at a lower cost. In addition, due to the presence of the oil shield 5, it also partially prevents the oil from splashing to other non-lubricated areas, such as splashing onto the inner wall of the bridge housing 1. The gear oil splashed by the driven gear 3 flows back along the inner wall of the oil shield 5 to the vicinity of the driven gear 3, and can also lubricate the moving parts near the driven gear 3, meeting the lubrication requirements inside the drive axle, and further reducing the demand for gear oil in the drive axle. From this aspect, the oil shield structure also improves the economic efficiency of the drive axle. In this embodiment, considering the lubrication requirements of the moving parts and the processing and installation accuracy of the oil shield 5, the gap between the inner wall of the oil shield 5 and the peripheral edge of the driven gear 3 is preferably 3-5mm; considering the performance and processing cost of the oil shield 5, it is preferably made of metal pressing.

[0023] Furthermore, the oil shield 5 includes an arcuate plate 51 arranged along the circumference of the driven gear 3. The length of the arcuate plate 51 can be approximately half the circumference of the circle around which it is located, and its lower end is located below the gear oil level when the drive axle is in operation. Side wing plates 52 extend from both sides of the arcuate plate 51 in the width direction. The free end of each side wing plate 52 is close to the direction of the driven gear 3. The two side wing plates 52 are symmetrical and form a certain angle. Therefore, the side wing plates 52 and the arcuate plate 51 can effectively cover the corresponding side edges of the driven gear 3, further reducing unnecessary splash lubrication losses.

[0024] To effectively secure the oil shield 5 using the existing structure and reduce the cost of securing the oil shield 5, mounting brackets 53 are provided on each of the two side wing plates 52. Each mounting bracket 53 has a first mounting hole 54, and the bearing seat 4 has a second mounting hole. The size and position of the first mounting hole 54 match the second mounting hole of the corresponding bearing seat 4. The first and second mounting holes are connected to the oil shield 5 and the bearing seat 4 within the axle housing 1 using common bolts. Here, the bearing seat 4 can be a Haversian bearing seat.

[0025] In some embodiments, as Figure 4 As shown, a set of vertical drainage grooves 55 are provided on the inner surfaces of the curved plate 51 and the side wing plate 52. The drainage grooves 55 can quickly drain the gear oil accumulated on the inner surface of the oil shield 5, thereby improving the utilization efficiency of the gear oil. The drainage grooves 55 can be formed by sheet metal pressing and milling.

[0026] This device provides an oil shield 5, and sets the oil shield 5 on one side of the rotation direction of the driven gear 3, which can effectively reduce the amount of gear oil carried by the driven gear 3, reduce the oil stirring power of the driven gear 3, and thus reduce power loss. At the same time, the oil shield 5 has a simple structure and a low manufacturing cost. Overall, this structure can improve the transmission efficiency of the drive axle at a lower cost.

[0027] The above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention may be implemented. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. An oil shield structure for a commercial drive axle, comprising a bridge housing (1) capable of containing gear oil, a driven gear (3) and a pair of bearing seats (4) being provided in the bridge housing (1), the driven gear (3) being located between the pair of bearing seats (4); characterized in that: An oil shield (5) is fixedly provided in the bridge housing (1). The oil shield (5) is located on one side of the rotation direction of the driven gear (3). The rotation direction of the driven gear (3) corresponds to the forward direction of the vehicle. A certain gap exists between the inner wall of the oil shield (5) and the peripheral edge of the driven gear (3). When the driven gear (3) rotates, the oil shield (5) prevents the driven gear (3) from carrying excessive gear oil.

2. The oil shield structure for a commercial drive axle according to claim 1, characterized in that: The oil shield (5) comprises an arc-shaped plate (51) arranged along the peripheral contour of the driven gear (3), and side wing plates (52) extending from both sides of the arc-shaped plate (51) in the width direction, with the free end of each side wing plate (52) close to the direction of the driven gear (3).

3. The oil shield structure for a commercial drive axle according to claim 2, characterized in that: The two side wing plates (52) are respectively provided with mounting brackets (53), the mounting brackets (53) are provided with a first mounting hole (54), the bearing seat (4) has a second mounting hole, and the first and second mounting holes connect the oil shield (5) and the bearing seat (4) together in the bridge housing (1) through a common bolt.

4. The oil shield structure for a commercial drive axle according to claim 2 or 3, characterized in that: A group of vertically arranged drainage grooves (55) are provided on the inner side surfaces of the arc-shaped plate (51) and the side wing plate (52).

5. The oil shield structure for a commercial drive axle according to claim 1, characterized in that: The gap between the inner wall of the oil shield (5) and the peripheral edge of the driven gear (3) is 3-5 mm.

6. The oil shield structure for a commercial drive axle according to claim 1, characterized in that: The lower end portion of the oil shield (5) is located below the gear oil level when the drive axle is in operation.

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