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, a main speed reducer and an oil pump, the main speed reducer comprises a shell, a driving gear shaft, a driven gear shaft, a first gear and a second gear. The higher end of the driving gear shaft is pivoted to the shell through a first bearing. The shell is provided with an oil inlet channel and an oil outlet channel, the power input end of the oil pump is connected with the driven gear shaft, one end of the oil inlet channel extends to the portion, located on the outer periphery of the driven gear shaft, in the speed reducer cavity, and the other end of the oil inlet channel communicates with an oil inlet of the oil pump. One end of the oil outlet channel communicates with an oil outlet of the oil pump, and the other end of the oil outlet channel extends to the part, located above the first bearing, in the speed reducer cavity. According to the utility model, the first bearing for connecting the driving gear shaft and the shell can be fully lubricated, and the situation that the first bearing between the higher part of the driving gear shaft and the shell is abnormally abraded and sintered is avoided.

Description

Technical Field

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

[0002] The current drive axle usually includes an axle housing, a main reducer installed on the axle housing, and the main reducer includes a housing, a driving gear shaft, and a driven gear shaft. The housing is connected to the axle housing to form a reducer cavity. The driving gear shaft and the driven gear shaft are installed inside the reducer cavity. Linkage gears are installed on the driving gear shaft and the driven gear shaft. The driving gear shaft and the driven gear shaft are synchronously connected through the meshing of the linkage gears. The driving gear shaft is connected to the output end of the engine and the motor. The driven gear shaft is used to transmit power from the driving gear shaft to the differential located in the reducer cavity. The power is transmitted from the differential to the two half shafts respectively. Then it is transmitted to the two wheel ends through the two half shafts; restricted by the installation angle of the main reducer on the bridge housing, and in order to facilitate the connection between the engine or motor output end and the main reducer, after the drive axle is installed, the driving gear is tilted and located above the driven gear shaft. Due to the limited liquid level of the lubricating oil inside the reducer cavity, it is difficult for the lubricating oil to lubricate the driving gear shaft well, especially the upper end of the driving gear shaft. Due to the relatively high height, it is difficult for the lubricating oil to reach the bearing between the driving gear shaft and the housing. Therefore, it is very easy to cause abnormal wear or sintering of the bearing here due to inadequate lubrication. Utility Model Content

[0003] In view of the shortcomings of the prior art, the first object of the utility model is to propose an oil lubrication structure for a drive axle to solve the problem of insufficient lubrication of the driving gear shaft on the main reducer.

[0004] The second purpose of the utility model is to provide a drive axle.

[0005] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0006] The oil lubrication structure of the driving axle is characterized by comprising an axle housing, a main reducer, and an oil pump; the main reducer comprises a housing, a driving gear shaft, a driven gear shaft, a first gear, and a second gear; the housing is connected to the axle housing and forms a reducer cavity with the axle housing; the driving gear shaft and the driven gear shaft are both located in the reducer cavity and are tilted; the driving gear shaft is located above the driven gear shaft, and the higher end of the driving gear shaft is pivotally connected to the housing through a first bearing; the first gear is connected to the driving gear shaft; the second gear is connected to the driven gear shaft and meshes with the first gear;

[0007] An oil inlet channel and an oil outlet channel are provided on the outer shell. The power input end of the oil pump is connected to the driven gear shaft. One end of the oil inlet channel extends to the part of the reducer cavity located at the outer periphery of the driven gear shaft, and the other end is connected to the oil inlet of the oil pump. One end of the oil outlet channel is connected to the oil outlet of the oil pump, and the other end extends to the part of the reducer cavity located above the first bearing.

[0008] The higher end of the driven gear shaft is pivotally connected to the housing through a second bearing, and one end of the oil inlet passage extends into the reducer cavity and is located at the outer periphery of the second bearing.

[0009] The outer shell includes a shell, a first end cover fixedly connected to the shell, and a second end cover fixedly connected to the shell. The inner wall surface of the first end cover is provided with a bearing mounting groove, and the first bearing is installed in the bearing mounting groove. The other end of the oil outlet channel extends to the top of the bearing mounting groove; the oil pump is fixedly connected to the outer side of the second end cover, and the power input end of the oil pump is provided with an oil pump shaft that passes through the second end cover and is connected to the driven gear shaft.

[0010] The first end cover includes a first side wall and a first top wall located at the top of the first side wall, and the first side wall is abutted against the inner surface of the shell; the bearing mounting groove is located on the inner surface of the first side wall, and the oil outlet channel includes a first connecting hole located on the first side wall, a second connecting hole located on the shell, and a third connecting hole located on the second end cover, the upper end of the first connecting hole extends from the inner surface of the first side wall and is located above the bearing mounting groove, and the lower end extends to the outer peripheral surface of the first side wall, one end of the second connecting hole extends to the inner surface of the shell and is connected to the lower end of the first connecting hole, and the third connecting hole connects the other end of the second connecting hole with the oil outlet of the oil pump.

[0011] The second end cover includes a second side wall and a second top wall located at the top of the second side wall. The bottom end face of the second side wall is connected to the top surface of the shell. The other end of the second connecting hole extends to the top surface of the shell. The lower end of the third connecting hole extends to the bottom end surface of the second side wall to communicate with the other end of the second connecting hole. The upper end portion of the third connecting hole extends to the second top wall to communicate with the oil outlet of the oil pump.

[0012] The oil inlet channel includes a fourth connecting hole located on the housing and a fifth connecting hole located on the second end cover. The lower end of the fourth connecting hole extends to the portion of the inner surface of the housing located at the outer periphery of the driven gear shaft, and the upper end extends to the top surface of the housing. The lower end portion of the fifth connecting hole extends to the bottom end surface of the second side wall to connect with the upper end of the fourth connecting hole, and the upper end portion of the fifth connecting hole extends to the second top wall to connect with the oil inlet of the oil pump.

[0013] A first flange is arranged on the outer periphery of the first side wall, the first flange is attached to the top surface of the shell and is fixed to the shell by a first bolt; a second flange is arranged on the bottom outer periphery of the second side wall, the second flange is attached to the top surface of the shell and is fixed to the shell by a second bolt.

[0014] A downwardly extending connection portion is provided at the bottom of the first side wall. The connection portion is located below the first flange and abuts against the inner surface of the shell. The lower end of the first connecting hole extends to the outer peripheral surface of the connection portion.

[0015] An annular sleeve is arranged inside the housing, and the second bearing is arranged in the sleeve. A gap is formed between the outer edge surface of the sleeve and the inner surface of the housing, and one end of the oil inlet channel is connected with the gap.

[0016] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0017] A drive axle comprises the oil lubrication structure of the drive axle mentioned above.

[0018] The beneficial effects of the utility model are:

[0019] The utility model pumps lubricating oil at a lower position inside the reducer cavity into a higher position inside the reducer cavity through an oil pump, so that the first bearing connecting the driving gear shaft and the housing can be fully lubricated, thereby avoiding abnormal wear and sintering of the first bearing between the higher part of the driving gear shaft and the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 for Figure 1 AA section view in;

[0022] Figure 3 for Figure 1 A schematic diagram of the cooperation between the first end cover and the shell;

[0023] Figure 4 for Figure 1 a cross-sectional view of the middle shell;

[0024] Figure 5 for Figure 1 A schematic diagram of the structure of the first end cover;

[0025] Figure 6 for Figure 1 Schematic diagram of the structure of the second end cover. DETAILED DESCRIPTION

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

[0027] like Figure 1 , 2 , 3, 4, 5, and 6 show an oil lubrication structure of a drive axle of the utility model, which includes a bridge housing (not shown), a main reducer, and an oil pump 40, wherein the main reducer includes a housing, a driving gear shaft 20, a driven gear shaft 30, a first gear, and a second gear; the housing is fixedly connected to the bridge housing, and the housing and the bridge housing together form a reducer cavity, the driving gear shaft 20 and the driven gear shaft 30 are both located in the reducer cavity, and after the main reducer is installed on the vehicle, the driving gear shaft 20 and the driven gear shaft 30 are both tilted, the driving gear shaft 20 is located above the driven gear shaft 30, and the higher end of the driving gear shaft 20 is pivotally connected to the housing through a first bearing 21, so that the driving gear shaft 20 can be relatively For the rotation of the outer shell, the first gear is connected to the driving gear shaft 20, the second gear is connected to the driven gear shaft 30, and the second gear is meshed with the first gear, so that the driving gear shaft 20 can drive the driven gear shaft 30 to rotate; an oil inlet channel and an oil outlet channel are provided on the outer shell, the oil pump 40 is fixed on the outer shell, and the power input end of the oil pump 40 is connected to the driven gear shaft 30, that is, the driven gear shaft 30 is used to provide power for the oil pump 40, one end of the oil inlet channel extends to the part of the reducer cavity located at the outer periphery of the driven gear shaft 30, and the other end is connected to the oil inlet of the oil pump 40, one end of the oil outlet channel is connected to the oil outlet of the oil pump 40, and the other end extends to the part of the reducer cavity located above the first bearing 21.

[0028] When the drive axle is in working state, the driving gear shaft 20 is driven by the engine or motor of the vehicle, and the driving gear shaft 20 drives the driven gear shaft 30 to rotate, so that the oil pump 40 is in working state. When the oil pump 40 is working, the lubricating oil at the outer periphery of the driven gear shaft 30 in the reducer cavity enters the oil inlet channel, and enters the oil outlet channel through the inside of the oil pump 40. The lubricating oil flows through the oil outlet channel to the position above the first bearing 21 inside the reducer cavity, lubricates the first bearing 21, and falls to the lower position of the reducer cavity after lubricating the first bearing 21. The oil pump 40 continuously makes the lubricating oil flow from the outer periphery of the driven gear shaft 30 to the position above the first bearing 21, and the lubricating oil circulates continuously inside the reducer cavity to continuously lubricate the first bearing 21. In the utility model, the lubricating oil at a lower position inside the reducer cavity is pumped into a higher position inside the reducer cavity by the oil pump 40, so that the first bearing 21 connecting the driving gear shaft 20 and the housing can be fully lubricated, thereby avoiding abnormal wear and sintering of the first bearing 21 between the higher part of the driving gear shaft 20 and the housing.

[0029] In a preferred embodiment of the present invention, the higher end of the driven gear shaft 30 is pivotally connected to the housing through a second bearing 31 , and one end of the oil inlet passage extends into the reducer cavity and is located at the outer periphery of the second bearing 31 .

[0030] The housing includes a housing 11, a first end cover 12, and a second end cover 13, wherein the housing 11 is the main body of the main reducer housing, the first end cover 12 and the second end cover 13 are both fixedly connected to the top of the housing 11, and the first end cover 12 and the second end cover 13 are respectively located at the outer ends of the driving gear shaft 20 and the driven gear shaft 30, and a bearing mounting groove 1211 is provided on the inner wall surface of the first end cover 12, and the first bearing 21 is mounted in the bearing mounting groove 1211, and the other end of the oil outlet channel extends to the bearing mounting groove 1211. Above, the lubricating oil flowing out of the oil outlet channel can better lubricate the first bearing 21 located in the bearing mounting groove 1211. The oil pump 40 is fixed on the outer side of the second end cover 12, so that the oil pump 40 is located above the second end cover 12. An oil pump shaft is set at the power output end of the oil pump 12, and a through hole is set in the middle of the second end cover 12. The oil pump shaft passes through the through hole and is connected to the driven gear shaft 30, and then the driven gear shaft 30 is used as a driving component of the oil pump 12, so that the oil pump 12 can continue to work during the driving process of the vehicle. The first end cover 12 comprises a first side wall 121 and a first top wall 122 located at the top of the first side wall 121. The first side wall 121 is close to the inner surface of the housing 11. Specifically, a hole for the first end cover 12 to be embedded is provided at the top of the housing 11. After the first end cover 12 is installed on the top of the housing 11, a part of the first side wall 121 is embedded in the hole, and then the part of the first end cover 12 embedded in the hole is close to the inner surface of the housing 11. The bearing installation groove 1211 is located on the inner surface of the first side wall 121. The oil outlet channel comprises a first connecting hole 1201, The second connecting hole 112 and the third connecting hole 1302, wherein the first connecting hole 1201 is located on the first end cover 12, specifically, the upper end of the first connecting hole 1201 extends to the inner surface of the first side wall 121 and is located above the bearing mounting groove 1211, and the lower end extends to the outer peripheral surface of the first side wall 121, one end of the second connecting hole 112 extends to the inner surface of the shell and is connected to the lower end of the first connecting hole 1201, and the third connecting hole 1302 is located on the second end cover 13, and is used to connect the other end of the second connecting hole 112 with the oil outlet of the oil pump 40. The second end cover 13 includes a second side wall 131 and a second top wall 132 located at the top of the second side wall 131. The bottom end face of the second side wall 131 is connected to the top surface 110 of the shell 11. The other end of the second connecting hole 112 extends to the top surface 110 of the shell 11. The lower end of the third connecting hole 1302 extends to the bottom end face of the second side wall 131. After the second end cover 13 is fixed to the shell 11, the lower end of the third connecting hole 1302 is connected to the other end of the second connecting hole 112, and the upper end of the third connecting hole 1302 extends to the second top wall 132, and then the upper end of the third connecting hole 1302 is connected to the oil outlet of the oil pump 40 fixed on the outside of the second top wall 132.The above-mentioned oil inlet channel includes a fourth connecting hole 111 located on the shell 11, and a fifth connecting hole 1301 located on the second end cover 13. The lower end of the fourth connecting hole 111 extends to the inner surface of the shell 11 located at the outer periphery of the driven gear shaft 30, and the upper end extends to the top surface 110 of the shell 11. The lower end of the fifth connecting hole 1301 extends to the bottom end surface of the second side wall 121. After the second end cover 13 is fixed to the shell 11, the lower end of the fifth connecting hole 1301 is connected with the upper end of the fourth connecting hole 111 at the top surface 110, and the upper end of the fifth connecting hole 1301 extends to the second top wall 122, so that the upper end of the fifth connecting hole 1301 is connected to the oil inlet of the oil pump 40 fixed on the outside of the second top wall 122.

[0031] In the utility model, a first flange 123 is arranged on the outer periphery of the first side wall 121 of the end cover 12, the first flange 123 is attached to the top surface 110 of the housing 11, and is fixed to the housing 11 by a plurality of first bolts 125; a second flange 133 is arranged on the outer periphery of the bottom of the second side wall 131, the second flange 133 is attached to the top surface 110 of the housing 10, and is fixed to the housing 11 by a plurality of second bolts 134, so that the assembly of the main reducer is convenient. Sealing rings are arranged between the first flange 123 and the top surface 110 of the housing 11, and between the second flange 133 and the top surface 110 of the housing 11, so as to ensure the sealing of the oil outlet channel and the oil inlet channel. A downwardly extending connecting portion 124 is provided at the bottom of the first side wall 121. The connecting portion 124 is located below the first flange 123 and extends into the interior of the shell 11, and then abuts against the inner surface of the shell 11. The lower end portion of the first connecting hole 1201 extends to the outer peripheral surface 124 of the connecting portion, so that the lower end portion of the first connecting hole 1201 can be connected to the second connecting hole 112 extending to the inner surface of the shell 11.

[0032] In the utility model, an annular sleeve 14 is provided inside the outer shell. Specifically, the sleeve 14 can be provided inside the housing 11. The second bearing is installed in the sleeve 14 so that the second bearing is used to pivot the driven gear shaft 30 on the outer shell. A gap 141 is formed between the outer edge surface of the sleeve 14 and the inner surface of the outer shell. One end of the oil inlet channel is connected to the gap 141. Specifically, the lower end of the fourth connecting hole 111 extends downward to the top of the gap 141.

[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: It includes a bridge housing, a main reducer, and an oil pump; the main reducer includes a housing, a driving gear shaft, a driven gear shaft, a first gear, and a second gear; the housing is connected to the bridge housing and forms a reducer cavity with the bridge housing; the driving gear shaft and the driven gear shaft are both located in the reducer cavity and are tilted; the driving gear shaft is located above the driven gear shaft, and the higher end of the driving gear shaft is pivotally connected to the housing through a first bearing; the first gear is connected to the driving gear shaft; the second gear is connected to the driven gear shaft and meshes with the first gear; An oil inlet channel and an oil outlet channel are provided on the outer shell. The power input end of the oil pump is connected to the driven gear shaft. One end of the oil inlet channel extends to the part of the reducer cavity located at the outer periphery of the driven gear shaft, and the other end is connected to the oil inlet of the oil pump. One end of the oil outlet channel is connected to the oil outlet of the oil pump, and the other end extends to the part of the reducer cavity located above the first bearing.

2. The oil lubrication structure of the drive axle according to claim 1, characterized in that: The higher end of the driven gear shaft is pivotally connected to the housing through a second bearing, and one end of the oil inlet passage extends into the reducer cavity and is located at the outer periphery of the second bearing.

3. The oil lubrication structure of the drive axle according to claim 1, characterized in that: The outer shell includes a shell, a first end cover fixedly connected to the shell, and a second end cover fixedly connected to the shell. The inner wall surface of the first end cover is provided with a bearing mounting groove, and the first bearing is installed in the bearing mounting groove. The other end of the oil outlet channel extends to the top of the bearing mounting groove; the oil pump is fixedly connected to the outer side of the second end cover, and the power input end of the oil pump is provided with an oil pump shaft that passes through the second end cover and is connected to the driven gear shaft.

4. The oil lubrication structure of the drive axle according to claim 3, characterized in that: The first end cover comprises a first side wall and a first top wall located on the top of the first side wall, and the first side wall is attached to the inner surface of the shell; The bearing mounting groove is located on the inner surface of the first side wall, and the oil outlet channel includes a first connecting hole located on the first side wall, a second connecting hole located on the shell, and a third connecting hole located on the second end cover. The upper end of the first connecting hole extends from the inner surface of the first side wall and is located above the bearing mounting groove, and the lower end extends to the outer peripheral surface of the first side wall. One end of the second connecting hole extends to the inner surface of the shell and is connected to the lower end of the first connecting hole. The third connecting hole connects the other end of the second connecting hole with the oil outlet of the oil pump.

5. The oil lubrication structure of the drive axle according to claim 4, characterized in that: The second end cover includes a second side wall and a second top wall located at the top of the second side wall. The bottom end face of the second side wall is connected to the top surface of the shell. The other end of the second connecting hole extends to the top surface of the shell. The lower end of the third connecting hole extends to the bottom end surface of the second side wall to communicate with the other end of the second connecting hole. The upper end portion of the third connecting hole extends to the second top wall to communicate with the oil outlet of the oil pump.

6. The oil lubrication structure of the drive axle according to claim 5, characterized in that: The oil inlet channel includes a fourth connecting hole located on the housing and a fifth connecting hole located on the second end cover. The lower end of the fourth connecting hole extends to the portion of the inner surface of the housing located at the outer periphery of the driven gear shaft, and the upper end extends to the top surface of the housing. The lower end portion of the fifth connecting hole extends to the bottom end surface of the second side wall to connect with the upper end of the fourth connecting hole, and the upper end portion of the fifth connecting hole extends to the second top wall to connect with the oil inlet of the oil pump.

7. The oil lubrication structure of the drive axle according to claim 5, characterized in that: A first flange is arranged on the outer periphery of the first side wall, the first flange is attached to the top surface of the shell and is fixed to the shell by a first bolt; a second flange is arranged on the bottom outer periphery of the second side wall, the second flange is attached to the top surface of the shell and is fixed to the shell by a second bolt.

8. The oil lubrication structure of the drive axle according to claim 7, characterized in that: A downwardly extending connection portion is provided at the bottom of the first side wall. The connection portion is located below the first flange and abuts against the inner surface of the shell. The lower end of the first connecting hole extends to the outer peripheral surface of the connection portion.

9. The oil lubrication structure of the drive axle according to claim 2, characterized in that: An annular sleeve is arranged inside the housing, and the second bearing is arranged in the sleeve. A gap is formed between the outer edge surface of the sleeve and the inner surface of the housing, and one end of the oil inlet channel is connected with the gap.

10. The drive axle is characterized in that: An oil lubrication structure for a drive axle comprising any one of claims 1-9.

Images