Oil lubrication structure of drive axle and drive axle

Abstract

The utility model discloses an oil lubrication structure of a drive axle and the drive axle. The oil lubrication structure of the drive axle comprises an axle housing and a main speed reducer, the axle housing comprises an axle package and two axle pipes, a first cavity used for containing the main speed reducer is formed in the axle package, and a second cavity is formed in each axle pipe. The bottom of the first cavity is lower than the bottom face of the second cavity, an oil guide channel is formed in the top of the first cavity, an oil inlet and an oil outlet are formed in the oil guide channel, and the oil inlet can guide lubricating oil attached to the top of the first cavity into the oil guide channel in the gear rotating process of the main speed reducer. The oil outlet is used for guiding lubricating oil in the oil guide channel into the second cavity; and an oil baffle plate is arranged at the joint of the first chamber and the second chamber. According to the drive axle, the situation that the liquid level of lubricating oil in the first cavity is high, and large resistance is caused to the gear is avoided, the transmission efficiency of the drive axle is improved, and it is ensured that the lubricating oil can well lubricate the gear and other parts of the main speed reducer.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to an oil lubrication structure of a drive axle and the drive axle. Background Art

[0002] The drive axle usually includes a bridge housing, a main reducer, and two half-axles. The bridge housing includes a bridge pack located in the middle and two bridge tubes respectively connected to the two sides of the bridge pack. The interior of the bridge pack has a relatively large space for accommodating the main reducer. The two half-axles are respectively connected to the main reducer through the two bridge tubes to distribute power to the wheel end structures at both ends of the bridge housing.

[0003] In order to lubricate the gears and other components of the main reducer, lubricating oil is usually filled inside the bridge pack. The liquid level of the lubricating oil inside the bridge pack of the existing bridge housing cannot be self-adjusted. When the liquid level of the lubricating oil inside the bridge pack is high, the lubricating oil causes greater resistance to the gears of the main reducer, resulting in low transmission efficiency of the drive axle. When the liquid level of the lubricating oil inside the bridge pack is low, it is difficult to lubricate the gears of the main reducer well. Utility Model Content

[0004] In view of the deficiencies in the prior art, the first purpose of the utility model is to propose an oil lubrication structure for a drive axle, which can self-regulate the liquid level of the lubricating oil to ensure that the gears of the main reducer have a better lubrication effect while improving the transmission efficiency of the drive axle.

[0005] The second purpose of the utility model is to provide a drive axle.

[0006] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0007] The oil lubrication structure of the drive axle, including the axle housing and the main reducer;

[0008] The bridge housing includes a bridge pack and two bridge tubes respectively connected to both sides of the bridge pack. The bridge pack forms a first chamber for accommodating the main reducer, and the bridge tube forms a second chamber connected to the side of the first chamber and communicating with the first chamber.

[0009] The bottom of the first chamber is lower than the bottom surface of the second chamber, the top of the first chamber is higher than the top surface of the second chamber, an oil guide channel is provided at the top of the first chamber, an oil inlet and an oil outlet are provided on the oil guide channel, the height of the oil outlet is lower than the height of the oil inlet, the oil inlet is configured to guide the lubricating oil incidental to the top of the first chamber during the rotation of the gear of the main reducer into the oil guide channel, and the oil outlet is used to guide the lubricating oil in the oil guide channel into the second chamber;

[0010] An oil baffle is arranged at the position where the first chamber and the second chamber are connected, and the top of the oil baffle is higher than the bottom of the second chamber. When the lubricating oil level in the second chamber exceeds a predetermined value, the lubricating oil in the second chamber can flow into the first chamber through the top of the oil baffle.

[0011] The bridge bag includes a bridge bag top wall located at the top and a bridge bag bottom wall located at the bottom, the bridge bag top wall is an arc-shaped that protrudes upward in the middle, and the bridge bag bottom wall is an arc-shaped that is recessed downward in the middle; the bridge tube includes a bridge tube top wall located at the top and a bridge tube bottom wall located at the bottom, the bridge tube top wall is connected to the end of the bridge bag top wall, and the bridge tube bottom wall is connected to the end of the bridge bag bottom wall.

[0012] The bottom wall of the bridge tube and the bottom wall of the bridge package are smoothly transitioned and connected through an arc-shaped connecting portion, and the oil baffle is fixedly connected to the inner side of the arc-shaped connecting portion.

[0013] The oil baffle plate includes a baffle plate and a support plate. The bottom of the baffle plate is welded to the outer end of the arc-shaped connection part and the baffle plate gradually tilts upward from the outside to the inside. The support plate is formed by bending downward from the top of the baffle plate and the bottom of the support plate is welded to the inner end of the arc-shaped connection part.

[0014] The height difference between the top of the oil baffle plate and the bottom of the second chamber is 5-21 mm.

[0015] The oil guide channel is formed by an oil guide pipe connected to the inner wall of the bridge housing. The oil guide pipe extends from one of the second chambers across the first chamber to the other second chamber. Oil outlets are formed at both ends of the oil guide pipe, and the oil inlet is opened on the portion of the oil guide pipe located in the first chamber.

[0016] The oil inlet is opened on one side of the oil guide pipe so that the oil inlet faces the rotation direction of the top of the main reducer gear.

[0017] The oil guide pipe is provided with a plurality of oil inlets, which are arranged along the extending direction of the oil guide pipe and are arranged above the main reducer gear.

[0018] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0019] A drive axle comprises the oil lubrication structure of the drive axle mentioned above.

[0020] The beneficial effects of the utility model are:

[0021] The utility model provides an oil guide channel on the top of the bridge housing and an oil baffle at the position where the first chamber and the second chamber are connected, so that the lubricating oil level inside the first chamber for installing the main reducer is maintained at an appropriate position, thereby avoiding a large resistance to the gears due to the high lubricating oil level inside the first chamber, thereby improving the transmission efficiency of the drive axle. In addition, when the lubricating oil level inside the first chamber is low, the lubricating oil inside the second chamber can flow back to the first chamber in time, ensuring that the lubricating oil in the first chamber can play a good lubricating role on the gears and other components of the main reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the middle bridge housing;

[0024] Figure 3 for Figure 1 AA section view;

[0025] Figure 4 It is a schematic diagram of the use state of the utility model. DETAILED DESCRIPTION

[0026] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0027] like Figure 1 , 2As shown in Figure 3, an oil lubrication structure of a drive axle of the utility model comprises a bridge housing and a main reducer 50. The bridge housing comprises a bridge package 10 and two bridge tubes 20. The two bridge tubes 20 are respectively connected to both sides of the bridge package 10. A first chamber 11 for accommodating the main reducer 50 is formed inside the bridge package 10. A second chamber 21 is formed inside the bridge tube 20. The second chambers 21 of the two bridge tubes 20 are respectively connected to both sides of the first chamber 11 and communicated with the first chamber 11; the upper and lower sides of the bridge package 10 are both expanded outward relative to the bridge tube 20 so that the first chamber 11 inside the bridge package 10 can accommodate the relatively large main reducer 50. The structure of the upper and lower sides of the bridge package 10 is expanded so that the bottom of the first chamber 11 is lower than the bottom surface of the second chamber 21, and the top of the first chamber 11 is higher than the top surface of the second chamber 21. An oil guide pipe 30 is arranged on the top of the first chamber 11. The inside of the oil guide pipe 30 forms a The oil guide channel, the oil guide pipe 30 is arranged close to the top of the bridge housing, so that the oil guide pipe 30 crosses the first chamber 11 and the two second chambers 21, that is, the middle of the oil guide pipe 30 is placed on the top of the first chamber 11, and the two ends of the oil guide pipe 30 extend to the two second chambers 21 respectively to form oil outlets 32. The portion of the oil guide pipe 30 located inside the first chamber 11 is provided with an oil inlet 31. The oil guide pipe 30 is arranged along the top of the bridge housing so that the height of the oil outlet 32 ​​is lower than the height of the oil inlet 31. When the drive axle is working, the gear 51 of the main reducer 50 rotates. When the gear 51 rotates, the lubricating oil inside the first chamber 11 will be attached to the top of the first chamber 11. The lubricating oil attached to the gear 51 will be thrown into the oil inlet 31 by the gear 51 after the gear 51 rotates to the top of the first chamber 11. The lubricating oil entering the oil inlet 31 flows from the oil outlet 32 ​​into the second chamber 21 under the guidance of the oil guide pipe 30. An oil baffle plate 40 is provided at the position where the first chamber 11 and the second chamber 21 are connected, and the top height of the oil baffle plate 40 is higher than the bottom surface of the second chamber 21; the oil baffle plate 40 is used to prevent the lubricating oil inside the second chamber 21 from flowing into the first chamber 11. Specifically, the oil baffle plate 40 is set with a top higher than the bottom surface of the second chamber 21. When the lubricating oil level inside the second chamber 21 is lower than the top of the oil baffle plate 40, the lubricating oil inside the second chamber 21 is blocked by the oil baffle plate 40. With the guidance of the oil guide pipe 30, the liquid level of the lubricating oil inside the second chamber 21 reaches a predetermined value, that is, the liquid level of the lubricating oil inside the second chamber 21 is consistent with the top height of the oil baffle plate 40, and the lubricating oil entering the second chamber 21 will flow back to the first chamber 11 through the top of the oil baffle plate 40.

[0028] like Figure 3 , 4As shown, when the drive axle is working, the gear 51 of the main reducer 50 rotates, and the lubricating oil in the first chamber 11 is driven by the gear 51 to the oil guide pipe 30, and is guided to the second chamber 21 through the oil guide pipe 30. The lubricating oil in the second chamber 21 is blocked by the oil baffle plate 40 and temporarily stored in the second chamber 21. When the liquid level of the lubricating oil in the second chamber 21 increases to be flush with the top of the oil baffle plate 40, the lubricating oil in the second chamber 21 flows back to the first chamber 11 through the top of the oil baffle plate 40. Therefore, by setting a guide at the top of the bridge housing, An oil channel is provided with an oil baffle at the junction of the first chamber and the second chamber, so that the lubricating oil level inside the first chamber for installing the main reducer is maintained at an appropriate position, thereby avoiding a large resistance to the gears due to the high lubricating oil level inside the first chamber, thereby improving the transmission efficiency of the drive axle. In addition, when the lubricating oil level inside the first chamber is low, the lubricating oil inside the second chamber can flow back to the first chamber in time, thereby ensuring that the lubricating oil in the first chamber can play a better lubricating role on the gears and other components of the main reducer.

[0029] In a preferred embodiment, the bridge pack 10 of the utility model includes a bridge pack top wall 101 located at the top thereof, and a bridge pack bottom wall 102 located at the bottom thereof, the bridge pack top wall 101 is in an arc shape with a middle portion protruding upward, and the bridge pack bottom wall 102 is in an arc shape with a middle portion recessed downward, thereby, the bridge pack 10 is expanded outward relative to the two bridge tubes 20 to form a circular structure so that the first chamber 11 of the bridge pack 10 is sufficient to accommodate the main reducer 50; the bridge tube 20 includes a bridge tube top wall 201 located at the top thereof and a bridge tube bottom wall 202 located at the bottom thereof, the bridge tube top wall 201 is connected to the end of the bridge pack top wall 101, and the bridge tube bottom wall 202 is connected to the end of the bridge pack bottom wall 102. By setting the bridge pack 10 and the bridge tube 20 in the above-mentioned structure, the bottom of the first chamber 11 is lower than the bottom surface of the second chamber 21. In other embodiments, the bridge pack top wall 101 and the bridge pack bottom wall 102 may also be such that the bridge pack 10 forms an elliptical structure or other structures suitable for the installation of the main reducer 50. The bridge pack top wall 101 and the bridge pack bottom wall 102 do not necessarily have to be an arc structure, and may be other structures adapted to the external shape of the main reducer. The bridge tube bottom wall 202 and the bridge pack bottom wall 102 are smoothly connected through an arc-shaped connecting section 103, and the oil baffle plate 40 is fixedly connected to the inner side of the arc-shaped connecting section 103, so that the oil baffle plate 40 is located at the connection between the first chamber 11 and the second chamber 21. In order to prevent the oil baffle plate 40 from being deformed by the impact of the lubricating oil inside the bridge housing, thereby affecting the height position of the top of the oil baffle plate 40, the oil baffle plate 40 includes a baffle plate 41 and a support plate 42. The bottom of the baffle plate 41 is welded to the outer end of the arc-shaped connecting section 103, and the baffle plate 41 is gradually inclined upward from the outside to the inside, and the support plate 42 is formed by bending the top of the baffle plate 41 downward, and the bottom of the support plate 42 is welded to the inner end of the arc-shaped connecting portion 103. In this way, the baffle plate 41, the support plate 42, and the arc-shaped connecting portion 103 form a triangle-like structure to ensure that the oil baffle plate 40 can be stably connected to the inside of the bridge housing to prevent the oil baffle plate 40 from deforming.

[0030] In the utility model, the height difference between the top of the oil baffle plate 40 and the bottom of the second chamber 21 is 5~21mm, so as to avoid the semi-axis interference between the oil baffle plate 40 and the inside of the bridge tube 20 while ensuring that the oil baffle plate 40 can block the lubricating oil inside the second chamber 21; preferably, the height difference between the top of the oil baffle plate 40 and the bottom of the second chamber 21 is 12mm.

[0031] See also Figure 3The oil guide pipe 30 is fixedly arranged inside the bridge housing, and an oil guide channel is formed between the top of the first chamber 11 and the top of the second chamber 21. The oil inlet 31 is arranged on one side of the oil guide pipe 30, and the oil inlet 31 is arranged to face the rotation direction of the top of the gear 51 of the main reducer 50. In this way, when the gear 51 rotates, the lubricating oil is guided to the top of the gear 51 by the gear 51, and the lubricating oil is thrown into the oil inlet 31 by the top of the gear 51 under the action of inertia. In order to enable the gear 51 to bring more lubrication into the oil guide pipe 30, multiple oil inlets 31 can be opened on the oil guide pipe 30, and the multiple oil inlets 31 are arranged along the extension direction of the oil guide pipe 30, and the multiple oil inlets 31 are located above the gear 51 of the main reducer 50.

[0032] In other embodiments, the oil guide channel may also adopt other structural forms. For example, the oil guide channel may be set on the inner wall of the bridge housing. For example, a through hole extending from the bridge package top wall 101 to the bridge tube top wall 201 is processed on the bridge housing to form the oil guide channel.

[0033] The drive axle of the utility model includes the oil lubrication structure of the drive axle mentioned above, and other structures of the drive axle are the same as those in the prior art, which will not be described in detail here.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. The oil lubrication structure of the drive axle is characterized by: Including axle housing and main reducer; The bridge housing includes a bridge pack and two bridge tubes respectively connected to both sides of the bridge pack. The bridge pack forms a first chamber for accommodating the main reducer, and the bridge tube forms a second chamber connected to the side of the first chamber and communicating with the first chamber. The bottom of the first chamber is lower than the bottom surface of the second chamber, the top of the first chamber is higher than the top surface of the second chamber, an oil guide channel is provided at the top of the first chamber, an oil inlet and an oil outlet are provided on the oil guide channel, the height of the oil outlet is lower than the height of the oil inlet, the oil inlet is configured to guide the lubricating oil incidental to the top of the first chamber during the rotation of the gear of the main reducer into the oil guide channel, and the oil outlet is used to guide the lubricating oil in the oil guide channel into the second chamber; An oil baffle is arranged at the position where the first chamber and the second chamber are connected, and the top of the oil baffle is higher than the bottom of the second chamber. When the lubricating oil level in the second chamber exceeds a predetermined value, the lubricating oil in the second chamber can flow into the first chamber through the top of the oil baffle.

2. The oil lubrication structure of the drive axle according to claim 1, characterized in that: The bridge bag includes a bridge bag top wall located at the top and a bridge bag bottom wall located at the bottom, the bridge bag top wall is in an arc shape with a protrusion in the middle, and the bridge bag bottom wall is in an arc shape with a depression in the middle; The bridge tube comprises a bridge tube top wall located at the top thereof and a bridge tube bottom wall located at the bottom thereof, the bridge tube top wall is connected to the end of the bridge bag top wall, and the bridge tube bottom wall is connected to the end of the bridge bag bottom wall.

3. The oil lubrication structure of the drive axle according to claim 2, characterized in that: The bottom wall of the bridge tube and the bottom wall of the bridge package are smoothly transitioned and connected through an arc-shaped connecting portion, and the oil baffle is fixedly connected to the inner side of the arc-shaped connecting portion.

4. The oil lubrication structure of the drive axle according to claim 3, characterized in that: The oil baffle plate includes a baffle plate and a support plate. The bottom of the baffle plate is welded to the outer end of the arc-shaped connection part and the baffle plate gradually tilts upward from the outside to the inside. The support plate is formed by bending downward from the top of the baffle plate and the bottom of the support plate is welded to the inner end of the arc-shaped connection part.

5. The oil lubrication structure of the drive axle according to claim 1, characterized in that: The height difference between the top of the oil baffle plate and the bottom of the second chamber is 5-21 mm.

6. The oil lubrication structure of the drive axle according to claim 1, characterized in that: The oil guide channel is formed by an oil guide pipe connected to the inner wall of the bridge housing. The oil guide pipe extends from one of the second chambers across the first chamber to the other second chamber. Oil outlets are formed at both ends of the oil guide pipe, and the oil inlet is opened on the portion of the oil guide pipe located in the first chamber.

7. The oil lubrication structure of the drive axle according to claim 6, characterized in that: The oil inlet is opened on one side of the oil guide pipe so that the oil inlet faces the rotation direction of the top of the main reducer gear.

8. The oil lubrication structure of the drive axle according to claim 7, characterized in that: The oil guide pipe is provided with a plurality of oil inlets, which are arranged along the extending direction of the oil guide pipe and are arranged above the main reducer gear.

9. Drive axle, characterized in that: An oil lubrication structure for a drive axle comprising any one of claims 1-8.

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