Drive axle lubricating system and land leveler

Abstract

The invention discloses a drive axle lubricating system and a land leveler, and belongs to the technical field of engineering machinery. Lubricating oil on the oil stirring end side of a bevel gear is conducted from a first mounting cavity to a second mounting cavity through an oil guide channel, so that a second bearing can be lubricated; meanwhile, an oil collecting groove is used for collecting lubricating oil thrown to the inner cavity wall from the oil stirring end of the bevel gear and increasing oil pressure, so that a first one-way valve is opened, and the lubricating oil collected at the oil collecting groove enters an external oil pipe through the first one-way valve and finally flows into a second mounting cavity to lubricate a second bearing; therefore, the second bearing far away from the oil pool can be effectively lubricated in the running process of the drive axle, and the problem that the bearing is prone to heating due to the fact that the bearing cannot be effectively lubricated is solved.

Description

Technical Field

[0001] The invention relates to a drive axle lubrication system and a grader, belonging to the technical field of engineering machinery. Background Art

[0002] For high-speed reducers, due to the high rotation speed of the shaft, the heat generated by the bearings is high, and oil lubrication and ventilation caps are required for ventilation and cooling. The more common lubrication method currently is self-lubrication, that is, the oil is thrown out by the gear during the rotation process, and the thrown oil is collected and guided to the bearing for lubrication. Although this method can effectively lubricate the bearings close to the oil-throwing end of the gear, it has limited lubrication effect on the bearings far away from the oil-throwing end of the gear. The bearings that cannot be effectively lubricated still have insufficient lubrication and are prone to heat. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a drive axle lubrication system and a grader that can effectively lubricate the bearings on the side away from the gear stirring and oil throwing end, thereby avoiding the problem of the bearings being easily heated due to lack of effective lubrication.

[0004] In order to achieve the above purpose / solve the above technical problems, the present invention is implemented by adopting the following technical solutions: A drive axle lubrication system comprises an axle housing and a main reduction module arranged on one side of the axle housing; The axle housing is provided with an inner cavity and an oil filling port and an oil drain port connected to the inner cavity, and lubricating oil is added to the inner cavity to form an oil pool; A main bevel gear is arranged in the inner cavity, and the main reduction module comprises a secondary bevel gear connected to the main bevel gear in the inner cavity, a bearing seat, a first bearing, a second bearing and an oil seal mechanism for sealing the bearing seat; The bearing seat is provided with a first mounting cavity for mounting the first bearing and a second mounting cavity for mounting the second bearing; The driven bevel gear includes a driven wheel shaft, and the first bearing and the second bearing are connected to the driven wheel shaft through The first bearing is located at the end of the driven wheel shaft close to the oil pool; The bearing seat is provided with an oil guide channel for guiding lubricating liquid from the first mounting cavity to the second mounting cavity; An oil collecting groove is provided on one side of the inner cavity corresponding to the connection between the main bevel gear and the slave bevel gear. The oil collecting groove is connected to an external oil pipe. A first one-way valve is provided at one end of the external oil pipe close to the oil collecting groove. The end of the external oil pipe away from the oil collecting groove is connected to the second installation cavity.

[0005] Optionally, the oil guide channel is arranged at an angle.

[0006] Optionally, the oil guide channel is tapered.

[0007] Optionally, the oil guide channel includes a first channel and a second channel communicating with the first channel, the first channel communicating with the first installation cavity, the second channel communicating with the second installation cavity, and the aperture of the first channel is smaller than the aperture of the second channel.

[0008] Optionally, the opening pressure value of the first one-way valve is 0.2 bar.

[0009] Optionally, an oil collecting plate for quickly forming oil pressure in the oil collecting tank is provided in the oil collecting tank.

[0010] Optionally, the oil collecting plate includes a vertical plate and an arc-shaped plate connected to the vertical plate; the vertical plate faces the oil throwing direction of the main bevel gear, and the arc-shaped plate faces the oil throwing direction of the slave bevel gear.

[0011] Optionally, the deceleration module further includes an oil return mechanism; The oil return mechanism includes an oil return port opened on one side of the bridge housing and connected to the inner cavity, a first through hole opened on the bearing seat and connected to the second mounting cavity, a second through hole opened on the bearing seat and connected to the second mounting cavity, a second one-way valve connected to the first through hole, a third one-way valve connected to the second through hole, an electromagnetic reversing valve connected to the second one-way valve and the third one-way valve, an oil pump connected to the electromagnetic reversing valve, an oil return pipe, a temperature sensor and a controller; One end of the oil return pipe is connected to the oil return port, and the other end is connected to the oil pump; A check valve is provided at one end of the oil return pipe close to the oil return port; The axle housing is tilted, and the lubricating oil in the oil pool enters the oil return pipe; The temperature sensor is arranged in the second installation cavity; The temperature sensor, electromagnetic reversing valve and oil pump are all connected to the controller.

[0012] Optionally, the opening pressure of the second one-way valve and the third one-way valve is 0.2 bar.

[0013] Another aspect of the present invention provides a motor grader, comprising the above-mentioned drive axle lubrication system.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention conducts the lubricating oil from the oil stirring end side of the bevel gear from the first installation cavity to the second installation cavity through an oil guide channel, so that the second bearing can be lubricated. At the same time, the lubricating oil thrown from the oil stirring end of the bevel gear to the inner cavity wall is collected by an oil collecting groove and the oil pressure is increased, thereby opening the first one-way valve, and the lubricating oil collected in the oil collecting groove enters the external oil pipe through the first one-way valve, and finally flows into the second installation cavity to lubricate the second bearing, so that the second bearing far away from the oil pool can also be effectively lubricated during the operation of the drive axle, thereby solving the problem that the bearing is prone to heat due to the inability to be effectively lubricated.

[0015] 2. The present invention also utilizes the characteristic that when the vehicle is going uphill, the oil level in the bridge housing is inclined. The inclined oil level flows into the oil return port. At this time, due to the reflux of oil in the second mounting cavity, the second bearing cannot be effectively lubricated, and the temperature in the second mounting cavity rises. When the temperature meets the preset temperature threshold, the valves of the electromagnetic reversing valve corresponding to the second check valve and the third check valve are opened in sequence, the oil pump is started, and the lubricating oil enters the second oil cavity through the second check valve and the third check valve through the electromagnetic reversing valve to lubricate the second bearing, thereby avoiding the problem that the bearing cannot be effectively lubricated due to the reflux of lubricating oil when the vehicle is going uphill. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of a drive axle lubrication system provided by an embodiment of the present invention; Figure 2 is a schematic diagram of an oil guide channel in a drive axle lubrication system provided by an embodiment of the present invention; Figure 3 is a schematic diagram of a bearing seat in a drive axle lubrication system provided by an embodiment of the present invention (showing a first through hole and a second through hole); Figure 4 yes Figure 3 Sectional view of the middle section MM; Figure 5 is a schematic diagram of an external oil pipe in a drive axle lubrication system provided by an embodiment of the present invention; Figure 6 is a schematic diagram of an oil collecting plate in a drive axle lubrication system provided by an embodiment of the present invention; Figure 7 It is a schematic diagram of the oil level inside a drive axle lubrication system provided by an embodiment of the present invention when the vehicle is in an uphill state; Figure 8 It is a schematic diagram of a hydraulic circuit of an oil return mechanism of a drive axle lubrication system provided by an embodiment of the present invention; Fig. 9 It is a schematic diagram of an oil return mechanism of a drive axle lubrication system provided in an embodiment of the present invention.

[0017] In the figure: 1, bridge housing; 101, inner cavity; 102, refueling port; 103, oil drain port; 104, main bevel gear; 2, main reduction module; 201, slave bevel gear; 2011, driven wheel shaft; 202, bearing seat; 203, first bearing; 204, second bearing; 205, oil seal mechanism; 206, first installation cavity; 207, second installation cavity; 2081, oil return port; 2082, first through hole; 2083, second Through hole; 2084, second one-way valve; 2085, third one-way valve; 2086, solenoid reversing valve; 2087, oil pump; 2088, oil return pipe; 2089, temperature sensor; 3, oil guide channel; 301, first channel; 302, second channel; 4, oil collecting tank; 5, external oil pipe; 6, first one-way valve; 7, oil collecting plate; 701, vertical plate; 702, arc plate; 8, oil tank; 9, overflow valve; 10, check valve. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0019] like Figure 1 As shown, a drive axle lubrication system comprises an axle housing 1 and a main reduction module 2 installed on one side of the axle housing 1; wherein the axle housing 1 has an inner cavity 101, a refueling port 102 is provided at the top of the inner cavity 101, an oil plug (not shown) is installed at the refueling port 102, an oil drain port 103 is provided at the bottom of the inner cavity 101, an oil plug (not shown) is installed at the oil drain port 103, lubricating oil is added to the inner cavity 101 through the refueling port 102, and the lubricating oil accumulates at the oil drain port 103 to form an oil pool; a main bevel gear 104 is installed in the inner cavity 101, and the bottom of the main bevel gear 104 is immersed in the oil pool; The reduction module includes a secondary bevel gear 201, a bearing seat 202, a first bearing 203, a second bearing 204 and an oil seal mechanism 205 for sealing the bearing seat 202, which are arranged in the inner cavity 101 and connected to the primary bevel gear 104; wherein the bearing seat 202 is provided with a first installation cavity 206 and a second installation cavity 207, the first installation cavity 206 is connected to the inner cavity 101, and the first bearing 203 and the second bearing 204 are respectively installed in the first installation cavity 206 and the second installation cavity 207; The secondary bevel gear 201 further includes a driven wheel shaft 2011, and the first bearing 203 and the second bearing 204 are connected to the secondary bevel gear 201 through the driven wheel shaft 2011. The first bearing 203 is located at one end of the driven wheel shaft 2011 close to the oil pool; like Figure 2 As shown, the bearing seat 202 is provided with an oil guide channel 3 for guiding the lubricating liquid from the first installation cavity 206 to the second installation cavity 207. The oil guide channel 3 is tapered and inclined. Specifically: like Figure 3 and Figure 4 As shown, the oil guide channel 3 includes a first channel 301 and a second channel 302 connected to the first channel 301, the first channel 301 is connected to the first installation cavity 206, the second channel 302 is connected to the second installation cavity 207, the aperture of the first channel 301 is smaller than the aperture of the second channel 302, and the connection point between the second channel 302 and the second installation cavity 207 is lower than the connection point between the first channel 301 and the first installation cavity 206; when the main bevel gear 104 and the slave bevel gear 201 are running, the oil pool is agitated, part of the lubricating oil is thrown out, and the lubricating oil enters the first installation cavity 206 to lubricate the first bearing 203, and at the same time, part of the lubricating oil entering the first installation cavity 206 enters the second installation cavity 207 through the oil guide channel 3 to lubricate the second bearing 204. Since the second bearing 204 is far away from the oil pool, the second bearing 204 far away from the oil pool can also be effectively lubricated during the operation of the drive axle through the oil guide channel 3; like Figure 5 As shown, in order to improve the lubrication effect on the second bearing 204, an oil collecting tank 4 is opened on one side of the inner cavity 101 corresponding to the connection between the main bevel gear 104 and the slave bevel gear 201, and the oil collecting tank 4 is connected to an external oil pipe 5. A first one-way valve 6 is installed at one end of the external oil pipe 5 close to the oil collecting tank 4, and the opening pressure value of the first one-way valve 6 is 0.2 bar. The end of the external oil pipe 5 away from the oil collecting tank 4 is connected to the second installation cavity 207. When the main bevel gear 104 and the slave bevel gear 201 are running, the oil pool is stirred, and part of the lubricating oil is thrown out. The thrown-out lubricating oil gathers at the oil collecting tank 4 to form oil pressure and open the first one-way valve 6. The lubricating oil gathered at the oil collecting tank 4 enters the external oil pipe 5 through the first one-way valve 6, and finally flows into the second installation cavity 207 to lubricate the second bearing 204, so that the second bearing 204 away from the oil pool can also be effectively lubricated during the operation of the drive axle. like Figure 6 As shown, in order to improve the oil collection effect at the oil collecting tank 4, an oil collecting plate 7 is also installed in the oil collecting tank 4, specifically: The oil collecting plate 7 includes a vertical plate 701 and an arc plate 702 connected to the vertical plate 701; the vertical plate 701 faces the oil throwing direction of the main bevel gear 104, and the arc plate 702 faces the oil throwing direction of the slave bevel gear 201. It should be noted that the vertical plate 701 and the arc plate 702 do not block the connection between the oil collecting tank 4 and the external oil pipe 5. The upper side of the arc plate 702 is used to receive and quickly store the oil thrown from the slave bevel gear 201. When the gear runs at high speed, a large amount of lubricating oil is thrown into the oil collecting tank 4, which is easy to quickly build up oil pressure and open the first one-way valve 6; the vertical plate 701 is used to block the oil thrown from the main bevel gear 104, which can reduce the impact and damage of the lubricating oil thrown out by the main bevel gear 104 on the lateral oil field of the lubricating oil established at the arc plate 702, protect the single lubricating oil field formed at the oil collecting tank 4, and facilitate the rapid opening of the first one-way valve 6. Example

[0020] like Figure 1 As shown, a drive axle lubrication system comprises an axle housing 1 and a main reduction module 2 installed on one side of the axle housing 1; wherein the axle housing 1 has an inner cavity 101, a refueling port 102 is provided at the top of the inner cavity 101, an oil plug is installed at the refueling port 102, an oil drain port 103 is provided at the bottom of the inner cavity 101, an oil plug is installed at the oil drain port 103, lubricating oil is added to the inner cavity 101 through the refueling port 102, and the lubricating oil accumulates at the oil drain port 103 to form an oil pool; a main bevel gear 104 is installed in the inner cavity 101, and the bottom of the main bevel gear 104 is immersed in the oil pool; The reduction module includes a secondary bevel gear 201, a bearing seat 202, a first bearing 203, a second bearing 204 and an oil seal mechanism 205 for sealing the bearing seat 202, which are arranged in the inner cavity 101 and connected to the primary bevel gear 104; wherein the bearing seat 202 is provided with a first installation cavity 206 and a second installation cavity 207, the first installation cavity 206 is connected to the inner cavity 101, and the first bearing 203 and the second bearing 204 are respectively installed in the first installation cavity 206 and the second installation cavity 207; The secondary bevel gear 201 further includes a driven wheel shaft 2011, and the first bearing 203 and the second bearing 204 are connected to the secondary bevel gear 201 through the driven wheel shaft 2011. The first bearing 203 is located at one end of the driven wheel shaft 2011 close to the oil pool; like Figure 2 As shown, the bearing seat 202 is provided with an oil guide channel 3 for guiding the lubricating liquid from the first installation cavity 206 to the second installation cavity 207. The oil guide channel 3 is tapered and inclined. Specifically: like Figure 3 and Figure 4As shown, the oil guide channel 3 includes a first channel 301 and a second channel 302 connected to the first channel 301, the first channel 301 is connected to the first installation cavity 206, the second channel 302 is connected to the second installation cavity 207, the aperture of the first channel 301 is smaller than the aperture of the second channel 302, and the connection point between the second channel 302 and the second installation cavity 207 is lower than the connection point between the first channel 301 and the first installation cavity 206; when the main bevel gear 104 and the slave bevel gear 201 are running, the oil pool is agitated, part of the lubricating oil is thrown out, and the lubricating oil enters the first installation cavity 206 to lubricate the first bearing 203, and at the same time, part of the lubricating oil entering the first installation cavity 206 enters the second installation cavity 207 through the oil guide channel 3 to lubricate the second bearing 204. Since the second bearing 204 is far away from the oil pool, the second bearing 204 far away from the oil pool can also be effectively lubricated during the operation of the drive axle through the oil guide channel 3; like Figure 5 As shown, in order to improve the lubrication effect on the second bearing 204, an oil collecting tank 4 is opened on one side of the inner cavity 101 corresponding to the connection between the main bevel gear 104 and the slave bevel gear 201, and the oil collecting tank 4 is connected to an external oil pipe 5. A first one-way valve 6 is installed at one end of the external oil pipe 5 close to the oil collecting tank 4, and the opening pressure value of the first one-way valve 6 is 0.2 bar. The end of the external oil pipe 5 away from the oil collecting tank 4 is connected to the second installation cavity 207. When the main bevel gear 104 and the slave bevel gear 201 are running, the oil pool is stirred, and part of the lubricating oil is thrown out. The thrown-out lubricating oil gathers at the oil collecting tank 4 to form oil pressure and open the first one-way valve 6. The lubricating oil gathered at the oil collecting tank 4 enters the external oil pipe 5 through the first one-way valve 6, and finally flows into the second installation cavity 207 to lubricate the second bearing 204, so that the second bearing 204 away from the oil pool can also be effectively lubricated during the operation of the drive axle. like Figure 6 As shown, in order to improve the oil collection effect at the oil collecting tank 4, an oil collecting plate 7 is also installed in the oil collecting tank 4, specifically: The oil collecting plate 7 includes a vertical plate 701 and an arc plate 702 connected to the vertical plate 701; the vertical plate 701 faces the oil throwing direction of the main bevel gear 104, and the arc plate 702 faces the oil throwing direction of the slave bevel gear 201. It should be noted that the vertical plate 701 and the arc plate 702 do not block the connection between the oil collecting tank 4 and the external oil pipe 5. The upper side of the arc plate 702 is used to receive and quickly store the oil thrown from the slave bevel gear 201. When the gear runs at high speed, a large amount of lubricating oil is thrown into the oil collecting tank 4, which is easy to quickly build up oil pressure and open the first one-way valve 6; the vertical plate 701 is used to block the oil thrown from the main bevel gear 104, which can reduce the impact and damage of the lubricating oil thrown out by the main bevel gear 104 on the lateral oil field of the lubricating oil established at the arc plate 702, protect the single lubricating oil field formed at the oil collecting tank 4, and facilitate the rapid opening of the first one-way valve 6.

[0021] like Figure 7 As shown, as the vehicle is in the process of going uphill, A in the figure represents the slope angle, B represents the oil level, the oil level in the bridge housing 1 is inclined, and at the same time, the lubricating oil in the second installation cavity 207 will flow back to the inner cavity 101. In order to avoid the situation where the bearing is heated due to lack of lubricating oil during the process of the vehicle going uphill, the reduction module also includes an oil return mechanism, wherein the oil return mechanism includes an oil return port 2081 opened on one side of the bridge housing 1 and connected to the inner cavity 101, a first through hole 2082 opened on the bearing seat 202 and connected to the second installation cavity 207, and a first through hole 2083 opened on the bearing seat 202 and connected to the second installation cavity 207. The second through hole 2083 connected to the second installation cavity 207, the second one-way valve 2084 installed in the first through hole 2082, the third one-way valve 2085 installed in the second through hole 2083, the electromagnetic reversing valve 2086 connected to the second one-way valve 2084 and the third one-way valve 2085, the oil pump 2087 connected to the electromagnetic reversing valve 2086, the oil return pipe 2088, the temperature sensor 2089 and the controller (not shown), the opening pressure of the second one-way valve 2084 and the third one-way valve 2085 is 0.2 bar, specifically: like Figure 8 and Fig. 9 As shown, the oil pump 2087 is equipped with an oil tank 8, and the oil tank 8 is equipped with a relief valve 9. One end of the oil return pipe 2088 is connected to the oil return port 2081, and the other end is connected to the oil tank 8 of the oil pump 2087. A check valve 10 is installed at one end of the oil return pipe 2088 close to the oil return port 2081. The opening pressure of the check valve 10 is 0.05 bar. When the axle housing 1 is tilted due to the vehicle going uphill, the lubricating oil in the oil pool enters the oil return pipe 2088 through the check valve 10. The temperature sensor 2089 is installed in the second installation cavity 207. The temperature sensor 2089, the electromagnetic reversing valve 2086, and the oil pump 2087 are all connected to the controller; When the vehicle is going uphill, the inclined oil level flows into the oil return port 2081 and gathers in the oil tank of the oil pump 2087. At this time, due to the reflux of oil in the second installation cavity 207, the second bearing 204 cannot be effectively lubricated, and the temperature in the second installation cavity 207 rises. When the temperature sensor 2089 detects that the temperature meets the preset temperature threshold, in this embodiment, the preset threshold is 80°C and 100°C. When the temperature in the second installation cavity 207 reaches 80°C, the controller opens the valve of the electromagnetic reversing valve 2086 corresponding to the second one-way valve 2084 and opens the oil pump 2087, and the lubricating oil enters the second installation cavity 207 through the second one-way valve 2084 to lubricate the second bearing 204. When the temperature in the second installation cavity 207 reaches 100° C., the controller opens the valve of the electromagnetic reversing valve 2086 corresponding to the third one-way valve 2085 , and the lubricating oil enters the second installation cavity 207 through the second one-way valve 2084 and the third one-way valve 2085 to lubricate the second bearing 204 .

[0022] How it works The oil guide channel 3 conducts the lubricating oil from the oil stirring end side of the bevel gear 201 from the first installation cavity 206 to the second installation cavity 207, so that the second bearing 204 can be lubricated. At the same time, the oil collecting groove 4 is used to collect the lubricating oil thrown from the oil stirring end of the bevel gear 201 to the wall of the inner cavity 101 and increase the oil pressure. The first one-way valve 6 is opened, and the lubricating oil collected in the oil collecting groove 4 enters the external oil pipe 5 through the first one-way valve 6 and finally flows into the second installation cavity 207. When the vehicle is going uphill, the inclined oil level flows into the oil return port 2081 and gathers in the oil tank 8 of the oil pump 2087. When the temperature in the second installation cavity 207 reaches 60°C, the controller opens the valve of the electromagnetic reversing valve 2086 corresponding to the second one-way valve 2084 and opens the oil pump 2087, and the lubricating oil enters the second installation cavity 207 through the second one-way valve 2084; When the temperature in the second installation cavity 207 reaches 80° C., the controller opens the valve of the electromagnetic reversing valve 2086 corresponding to the third one-way valve 2085 , and the lubricating oil enters the second installation cavity 207 through the second one-way valve 2084 and the third one-way valve 2085 .

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drive axle lubrication system, characterized in that: It comprises a bridge housing (1) and a main reduction module (2) arranged on one side of the bridge housing (1); The axle housing (1) is provided with an inner cavity (101), a refueling port (102) and an oil drain port (103) connected to the inner cavity (101); lubricating oil is added to the inner cavity (101) to form an oil pool; A main bevel gear (104) is provided in the inner cavity (101), and the main reduction module (2) comprises a secondary bevel gear (201) connected to the main bevel gear (104) in the inner cavity (101), a bearing seat (202), a first bearing (203), a second bearing (204), and an oil sealing mechanism (205) for sealing the bearing seat (202); The bearing seat (202) is provided with a first installation cavity (206) for installing the first bearing (203) and a second installation cavity (207) for installing the second bearing (204); The driven bevel gear (201) comprises a driven wheel shaft (2011), the first bearing (203) and the second bearing (204) are connected to the driven bevel gear (201) via the driven wheel shaft (2011), and the first bearing (203) is located at one end of the driven wheel shaft (2011) close to the oil pool; The bearing seat (202) is provided with an oil guide channel (3) for guiding lubricating liquid from the first installation cavity (206) to the second installation cavity (207); An oil collecting groove (4) is provided on one side of the inner cavity (101) corresponding to the connection between the main bevel gear (104) and the slave bevel gear (201); the oil collecting groove (4) is connected to an external oil pipe (5); a first non-return valve (6) is provided at one end of the external oil pipe (5) close to the oil collecting groove (4); and an end of the external oil pipe (5) away from the oil collecting groove (4) is connected to the second installation cavity (207).

2. The drive axle lubrication system according to claim 1, characterized in that: The oil guide channel (3) is arranged at an angle.

3. The drive axle lubrication system according to claim 1, characterized in that: The oil guide channel (3) is tapered.

4. The drive axle lubrication system according to claim 1 or 3, characterized in that: The oil guide channel (3) comprises a first channel (301) and a second channel (302) communicating with the first channel (301); the first channel (301) is communicated with the first installation cavity (206); the second channel (302) is communicated with the second installation cavity (207); and the aperture of the first channel (301) is smaller than the aperture of the second channel (302).

5. The drive axle lubrication system according to claim 1, characterized in that: The opening pressure value of the first one-way valve (6) is 0.2 bar.

6. The drive axle lubrication system according to claim 1, characterized in that: An oil collecting plate (7) for quickly forming oil pressure in the oil collecting tank (4) is provided in the oil collecting tank (4).

7. The drive axle lubrication system according to claim 6, characterized in that: The oil collecting plate (7) comprises a vertical plate (701) and an arc-shaped plate (702) connected to the vertical plate (701); the vertical plate (701) faces the oil throwing direction of the main bevel gear (104), and the arc-shaped plate (702) faces the oil throwing direction of the slave bevel gear (201).

8. The drive axle lubrication system according to claim 1, characterized in that: The deceleration module also includes an oil return mechanism; The oil return mechanism comprises an oil return port (2081) provided on one side of the bridge housing (1) and connected to the inner cavity (101), a first through hole (2082) provided on the bearing seat (202) and connected to the second mounting cavity (207), a second through hole (2083) provided on the bearing seat (202) and connected to the second mounting cavity (207), a second one-way valve (2084) connected to the first through hole (2082), a third one-way valve (2085) connected to the second through hole (2083), an electromagnetic reversing valve (2086) connected to the second one-way valve (2084) and the third one-way valve (2085), an oil pump (2087) connected to the electromagnetic reversing valve (2086), an oil return pipe (2088), a temperature sensor (2089) and a controller; One end of the oil return pipe (2088) is connected to the oil return port (2081), and the other end is connected to the oil pump (2087); A check valve is provided at one end of the oil return pipe (2088) close to the oil return port (2081); The axle housing (1) is tilted, and the lubricating oil in the oil pool enters the oil return pipe (2088); The temperature sensor (2089) is arranged in the second installation cavity (207); The temperature sensor (2089), the electromagnetic reversing valve (2086), and the oil pump (2087) are all connected to the controller.

9. The drive axle lubrication system according to claim 8, characterized in that: The opening pressure of the second one-way valve (2084) and the third one-way valve (2085) is 0.2 bar.

10. A motor grader, characterized in that: Comprising a drive axle lubrication system as claimed in any one of claims 1 to 9.

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