CN117646791A - Driving axle lubricating system and vehicle - Google Patents

Abstract

The invention provides a drive axle lubrication system and a vehicle. The drive axle lubrication system includes: the speed reducer assembly comprises a drive bevel gear assembly and a differential mechanism assembly, wherein the drive bevel gear assembly is meshed with the differential mechanism assembly, the drive bevel gear assembly comprises a first bearing area, the differential mechanism assembly comprises a second bearing area, and a gear meshing area is formed at the joint of the drive bevel gear assembly and the differential mechanism assembly; the oil storage tank is positioned at one side of the speed reducer assembly; the oil pump assembly comprises an oil pump and an oil pipe, one end of the oil pipe is communicated with the oil storage tank, the other end of the oil pipe is communicated with the shell of the speed reducer assembly, and the oil pump is used for enabling oil in the oil storage tank to be conveyed to the first bearing area, the second bearing area and the gear meshing area through the oil pipe. The point-to-point lubrication is realized by the arrangement, oil stirring is not needed for the gears in the gear meshing area, the efficiency of the drive axle is improved, and the efficiency loss during gear lubrication is reduced.

Description

Driving axle lubricating system and vehicle

Technical Field

The invention relates to the technical field of drive axles, in particular to a drive axle lubrication system and a vehicle.

Background

The drive axle mainly comprises spiral bevel gears, bearings, differential mechanism assemblies, reduction shells, axle shells and the like, a certain amount of lubricating oil is filled in the reduction gear shells and the axle shells before use, and the drive axle is lubricated in a splash lubrication mode so as to ensure normal meshing operation of rotating parts such as gears, bearings and the like.

When a splash lubrication mode is adopted, an oil duct is usually arranged on the shell reduction, and is usually cast; taking forward driving as an example, the spiral bevel gear rotates to drive lubricating oil to enter an upper oil duct from the upper parts of the axle housing and the reduction housing, and to reach the middle of the inner bearing and the outer bearing of the main gear to lubricate the main gear bearing; excess lubricating oil of the front bearing of the main tooth flows back into the reducer shell again from the oil drain channel; and the differential bearing lubrication is mainly splash lubrication, and the oil guiding structure is combined.

When splash lubrication is adopted, the efficiency of the drive axle can be obviously affected by oil stirring of the driven bevel gear due to the higher liquid level of the bottom oil pool, especially for high-rotation-speed working conditions.

Disclosure of Invention

The invention mainly aims to provide a drive axle lubrication system and a vehicle, which are used for solving the problem that in the prior art, the drive axle adopts splash lubrication to reduce gear lubrication efficiency.

In order to achieve the above object, according to one aspect of the present invention, there is provided a transaxle lubrication system. The drive axle lubrication system includes: the speed reducer assembly comprises a drive bevel gear assembly and a differential mechanism assembly, wherein the drive bevel gear assembly is meshed with the differential mechanism assembly, the drive bevel gear assembly comprises a first bearing area, the differential mechanism assembly comprises a second bearing area, and a gear meshing area is formed at the joint of the drive bevel gear assembly and the differential mechanism assembly; the oil storage tank is positioned at one side of the speed reducer assembly; the oil pump assembly comprises an oil pump and an oil pipe, one end of the oil pipe is communicated with the oil storage tank, the other end of the oil pipe is communicated with the shell of the speed reducer assembly, and the oil pump is used for enabling oil in the oil storage tank to be conveyed to the first bearing area, the second bearing area and the gear meshing area through the oil pipe.

Further, the oil pipe includes: the oil storage tank is provided with a plurality of branched pipes, and the outlets of the branched pipes are close to the first bearing area, the second bearing area and the gear meshing area; and one end of the oil return pipe is communicated with the oil storage tank, and the other end of the oil return pipe extends to the lower part of the speed reducer assembly.

Further, the speed reducer assembly comprises a drive bevel gear assembly shell, the drive bevel gear assembly is located in the drive bevel gear assembly shell, the differential mechanism assembly is arranged along the radial direction of the drive bevel gear assembly, the differential mechanism assembly is located at one end of the drive bevel gear assembly, and a gear meshing area is formed at the meshing position of a first bevel gear located at one end of the drive bevel gear assembly and a second bevel gear of the differential mechanism assembly.

Further, a left bearing and a right bearing are respectively arranged on two sides of the second bevel gear of the differential mechanism assembly, and a second bearing area is formed at the position where the left bearing and the right bearing are located.

Further, the plurality of branch pipes include first branch pipe, and first branch pipe includes first section pipe and second section pipe, and first section pipe is the level setting, and the second section pipe is vertical setting, and first end and the oil storage tank intercommunication of first section pipe, the second end of first section pipe and the first end intercommunication of second section pipe, the second end of second section pipe is located left bearing top.

Further, the plurality of branch pipes include the second branch pipe, and first branch pipe and second branch pipe have the setting of distance, and the second branch pipe includes third section pipe and fourth section pipe, and the third section pipe is vertical setting, and the fourth section pipe is the level setting, and the first end and the batch oil tank intercommunication of third section pipe, the second end and the first end intercommunication of fourth section pipe of third section pipe, fourth section pipe are located right bearing one side top, are equipped with a plurality of oil guide holes on the fourth section pipe of complaining, and a plurality of oil guide holes set up with interval.

Further, the drive bevel gear assembly comprises a main tooth inner bearing and a main tooth outer bearing, the main tooth inner bearing and the main tooth outer bearing are sleeved on a central shaft of the drive bevel gear assembly, the main tooth inner bearing is arranged close to the first bevel gear, the main tooth outer bearing and the main tooth inner bearing are arranged at intervals, and a first bearing area is formed at the position where the main tooth inner bearing and the main tooth outer bearing are located.

Further, the plurality of branch pipes further includes a third branch pipe, a first end of the third branch pipe is communicated with a second end of the third section pipe and a first end of the fourth section pipe of the second branch pipe, and the second end of the third branch pipe extends to the first bearing area along an opposite direction of the fourth section pipe.

Further, a plurality of oiling tubules are arranged above the gear meshing area of the third branch pipe, and the oiling tubules extend to the outer side of the second bevel gear of the differential mechanism assembly.

Further, the oil pump includes: the oil injection pump is arranged at one end of the oil injection pipe, which is close to the oil storage tank; the oil return pump is arranged at one end of the oil return pipe close to the oil storage tank.

According to another aspect of the present invention there is provided a vehicle comprising a drive axle lubrication system as described above.

By adopting the technical scheme, the independent oil storage tank is arranged above the speed reducer assembly, and the lubricating oil in the oil storage tank is guided to the first bearing area of the drive bevel gear assembly, the second bearing area of the differential mechanism assembly and the gear engagement area at the joint of the drive bevel gear assembly and the differential mechanism assembly through the oil pump and the oil pipe, so that point-to-point lubrication is realized, gears in the gear engagement area do not need to stir oil, the efficiency of a drive axle is improved, and the efficiency loss during gear lubrication is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic structural view of a first embodiment of a drive axle lubrication system according to the present invention;

fig. 2 shows a schematic structural view of a second embodiment of a drive axle lubrication system according to the invention.

Wherein the above figures include the following reference numerals:

1. a drive bevel gear assembly;

11. a first bearing region; 12. A first bevel gear;

13. a main tooth outer bearing; 14. A main tooth inner bearing;

2. a differential assembly; 22. a second bevel gear;

23. a left bearing; 24. a right bearing;

3. an oil storage tank; 31. a gear engagement region;

40. a branch pipe; 41. a filler pipe; 42. an oil return pipe;

411. a first branch pipe;

4111. a first section of tubing; 4112. a second section of tubing;

412. a second branch pipe;

4121. a third section of tubing; 4122. a fourth section of tubing; 4123. an oil guide hole;

413. a third branch pipe; 4131. oiling tubules;

5. a speed reducer housing;

51. an oil injection pump; 52. and (5) an oil return pump.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

The Drive Axle (Drive Axle) is a part of a power transmission system of a vehicle, and is mainly responsible for transmitting power of an engine to tires of the vehicle to Drive the vehicle forward. The drive axle is typically comprised of a drive shaft, differential, propeller shaft, gears, etc. The drive axles may be divided into a front drive axle, a rear drive axle, and four drive axles according to the driving modes of the vehicle. A speed reducer is a device in the transmission system for reducing the input shaft speed and increasing the output shaft torque. The speed reducer is typically composed of a set of gears that convert the high-speed rotation of the input shaft into a low-speed high-torque rotation of the output shaft by the gearing of the gears. Speed reducers are commonly used in transmission systems for various mechanical devices and vehicles to meet rotational speed and torque requirements under different operating conditions.

Lubricating the drive axle in a vehicle has the following effects: friction is reduced: the lubricating oil can form a thin oil film on the surface of the metal, so that direct contact between the metal is reduced, and friction and abrasion are reduced. Reducing the temperature: the lubricating oil can absorb and disperse heat generated by friction, prevent the drive axle from being overheated due to friction, and maintain normal working temperature. Corrosion and oxidation prevention: antioxidants and corrosion inhibitors in lubricating oils can prevent damage to metal parts from oxidation and corrosion. Noise and vibration reduction: the lubricating oil can fill and buffer gaps and uneven surfaces between metal parts, and noise and vibration are reduced. The transmission efficiency is improved: the lubricating oil can reduce friction loss in a transmission system, improve transmission efficiency and reduce energy consumption.

Referring to fig. 1-2, a drive axle lubrication system is provided according to an embodiment of the present invention.

Specifically, as shown in fig. 1 and 2, the drive axle lubrication system includes: the speed reducer assembly comprises a drive bevel gear assembly 1 and a differential gear assembly 2, the drive bevel gear assembly 1 is meshed with the differential gear assembly 2, the drive bevel gear assembly 1 comprises a first bearing area 11, the differential gear assembly 2 comprises a second bearing area, and a gear meshing area 31 is formed at the joint of the drive bevel gear assembly 1 and the differential gear assembly 2; the oil storage tank 3 is positioned at one side of the speed reducer assembly; the oil pump assembly comprises an oil pump and an oil pipe, one end of the oil pipe is communicated with the oil storage tank 3, the other end of the oil pipe is communicated with a shell of the speed reducer assembly, and the oil pump is used for conveying oil in the oil storage tank 3 to the first bearing area 11, the second bearing area and the gear meshing area 31 through the oil pipe.

In this embodiment, through setting up independent oil storage tank 3 above the reduction gear assembly, guide the lubricating oil in the oil storage tank 3 to the first bearing region of initiative taper gear assembly 1, the second bearing region of differential mechanism assembly 2 and initiative taper gear assembly 1 and the gear engagement region of differential mechanism assembly 2 junction through oil pump and oil pipe, set up like this and realized the point-to-point lubrication, the gear in the gear engagement region 31 need not stir the oil, has improved transaxle efficiency like this, the efficiency loss when having reduced gear lubrication.

Further, the oil pipe includes: a filler pipe 41, one end of the filler pipe 41 is communicated with the oil storage tank 3, a second end of the filler pipe 41 is provided with a plurality of branch pipes 40, and outlets of the plurality of branch pipes 40 are arranged close to the first bearing area 11, the second bearing area and the gear meshing area 31; and an oil return pipe 42, wherein one end of the oil return pipe 42 is communicated with the oil storage tank 3, and the other end of the oil return pipe 42 extends to the lower part of the speed reducer assembly. The filler pipe 41 serves as a tip of a filler pipe for supplying oil, and the inside of the speed reducer housing is supplied with oil at a plurality of positions, and after the oil reaches the inside of the speed reducer housing through the filler pipe 41, the oil is supplied to the first bearing region 11, the second bearing region and the gear meshing region 31 by different branch pipes 40. Meanwhile, an oil return hole is formed in the bottom of the speed reducer shell, and lubricating oil at the bottom of the speed reducer is timely pumped to an upper oil tank through an oil return pipe 42.

Further, the speed reducer assembly comprises a speed reducer housing 5, the drive bevel gear assembly 1 is located in the speed reducer housing 5, the differential assembly 2 is arranged along the radial direction of the drive bevel gear assembly 1, the differential assembly 2 is located at one end of the drive bevel gear assembly 1, and a gear meshing area 31 is formed at the meshing position of a first bevel gear 12 located at one end of the drive bevel gear assembly 1 and a second bevel gear 22 of the differential assembly 2. The function of the first bevel gear 12 of the drive bevel gear assembly 1 meshing with the second bevel gear 22 of the differential assembly 2 is to transmit the input power to the differential assembly 2 and to perform a speed reducing function. When the first bevel gear 12 of the drive bevel gear assembly 1 meshes with the second bevel gear 22 of the differential assembly 2, power will be transferred to the second bevel gear 22 of the differential assembly 2 as the input shaft rotates. Since the number of teeth of the first bevel gear 12 is different from that of the second bevel gear 22, the rotational speed will be reduced. In this way, the differential assembly 2 transmits the decelerated power to other components through the second bevel gear 22, thereby realizing the deceleration function of the whole system. At the same time, this meshing connection can also increase torque by means of the gearing of the gears and can transmit a change in the direction of the force. In summary, the meshing connection of the first bevel gear 12 of the drive bevel gear assembly 1 with the second bevel gear 22 of the differential assembly 2 serves as a speed reducing and steering drive.

Specifically, both sides of the second bevel gear 22 of the differential assembly 2 are respectively provided with a left bearing 23 and a right bearing 24, and the positions of the left bearing 23 and the right bearing 24 form a second bearing area. The left bearing 23 and the right bearing 24 serve as support and positioning, respectively, on both sides of the second bevel gear 22 of the differential assembly 2. The left bearing 23 and the right bearing 24 are mounted on the housing or support structure of the differential assembly 2, respectively, and are coupled to the second bevel gear 22 by an inner race or an outer race. They can withstand the axial and radial forces of the second bevel gear 22 so that the second bevel gear 22 can rotate normally and maintain the correct positional relationship with the other gears. Meanwhile, the left bearing 23 and the right bearing 24 can also reduce friction and abrasion, and improve the working efficiency and service life of the differential assembly 2.

Further, the plurality of branch pipes 40 includes a first branch pipe 411, the first branch pipe 411 includes a first segment pipe 4111 and a second segment pipe 4112, the first segment pipe 4111 is horizontally disposed, the second segment pipe 4112 is vertically disposed, a first end of the first segment pipe 4111 is communicated with the oil tank 3, a second end of the first segment pipe 4111 is communicated with a first end of the second segment pipe 4112, and a second end of the second segment pipe 4112 is located above the left bearing 23. The first branch pipe 411 is used to lubricate the left bearing 23 of the differential assembly 2, preventing friction and wear of the left bearing 23.

Further, the plurality of branch pipes 40 includes a second branch pipe 412, the first branch pipe 411 is disposed at a distance from the second branch pipe 412, the second branch pipe 412 includes a third section pipe 4121 and a fourth section pipe 4122, the third section pipe 4121 is disposed vertically, the fourth section pipe 4122 is disposed horizontally, a first end of the third section pipe 4121 is communicated with the oil tank 3, a second end of the third section pipe 4121 is communicated with a first end of the fourth section pipe 4122, the fourth section pipe 4122 is disposed above one side of the right bearing 24, and a plurality of oil guiding holes 4123 are disposed on the fourth section pipe 4122 and the plurality of oil guiding holes 4123 are disposed at intervals. The arrangement is such that the second branch pipe 412 is used for lubrication of the right bearing 24 of the differential assembly 2, a plurality of oil guide holes 4123 are provided at intervals on the second branch pipe 412, and the fourth-stage pipe 4122 of the second branch pipe 412 is horizontally provided above the right bearing 24, and the oil guide holes 4123 are provided on the fourth-stage pipe 4122 such that the lubricating oil drops to the right bearing 24 through the oil guide holes 4123 to lubricate the right bearing 24.

Further, the drive bevel gear assembly 1 comprises a main tooth inner bearing 14 and a main tooth outer bearing 13, the main tooth inner bearing 14 and the main tooth outer bearing 13 are sleeved on a central shaft of the drive bevel gear assembly 1, the main tooth inner bearing 14 is arranged close to the first bevel gear 12, the main tooth outer bearing 13 and the main tooth inner bearing 14 are arranged at intervals, and a first bearing area 11 is formed at the position of the main tooth inner bearing 14 and the position of the main tooth outer bearing 13. The function of the main tooth inner bearing 14 and the main tooth outer bearing 13 is to support and position the main gear. The main gear inner bearing 14 is located on the inner ring of the main gear, mainly bears the radial load of the main gear, and also plays a role in positioning the main gear. The main gear outer bearing 13 is positioned on the outer ring of the main gear, bears the axial force and torque of the main gear, and also plays a role in positioning the main gear. The two bearings work together to ensure the normal operation of the main gear and the power transmission.

Further, the plurality of branch pipes 40 further includes a third branch pipe 413, a first end of the third branch pipe 413 communicates with a second end of the third section pipe 4121 and a first end of the fourth section pipe 4122 of the second branch pipe 412, and a second end of the third branch pipe 413 extends to the first bearing area 11 in an opposite direction of the fourth section pipe 4122. The arrangement is such that the third branch pipe 413 drains lubricating oil to the main tooth inner bearing 14 and the main tooth outer bearing 13 of the drive bevel gear assembly 1, so that friction and abrasion of the bearings are prevented, the effect of the lubricating bearings is to reduce friction and abrasion between the bearings and the shaft, energy loss is reduced, and the service life of the bearings is prolonged. The lubricating bearing can provide a lubricating oil film to form a layer of lubricating film, so that the friction coefficient is reduced, the friction resistance of the bearing during movement is reduced, and the bearing can run more stably. In addition, the lubrication bearing can also prevent the oxidation corrosion of the bearing surface and prevent the corrosion and abrasion of the bearing.

Further, a plurality of lubricators 4131 are provided above the gear engagement region 31 in the third branch pipe 413, and the plurality of lubricators 4131 extend to the outside of the second bevel gear 22 of the differential assembly 2. The plurality of oiling tubules 4131 are evenly spaced, so that lubricating oil can be conveniently and evenly drained to the gear meshing position, meanwhile, the plurality of oiling tubules 4131 are led out on the third branch pipe 413, the pipe diameter of the oiling tubules 4131 is smaller than that of the third branch pipe 413, so that the gear at the gear meshing position is slowly lubricated, excessive oil quantity of the gear is prevented, and the transmission efficiency of the gear is reduced. In the present embodiment, the number of the lubricators 4131 is three, and in other embodiments, the number of the lubricators 4131 is not limited to this, and may be five, six, or the like.

Specifically, the oil pump includes: the oil filling pump 51, the oil filling pump 51 is set up in the end near the oil storage tank 3 of the oil filling pipe 41; and a scavenge pump 52, the scavenge pump 52 being arranged at one end of the scavenge pipe 42 near the oil reservoir 3. The arrangement is such that the oil filling pump 51 leads lubricating oil through the oil filling pipe 41 to the first bearing area of the drive bevel gear assembly 1, the second bearing area of the differential assembly 2 and the gear engagement area where the drive bevel gear assembly 1 is connected to the differential assembly 2, and the oil return pump 52 pumps oil from the bottom of the speed reducer housing 5 back into the oil reservoir 3 through the oil return pipe 42. In one embodiment, the oil filling pump 51 and the oil return pump 52 are all electric oil pumps, one ends of the oil filling pump 51 and the oil return pump 52 are connected with the bottom of the side face of the oil storage tank 3, the other ends of the oil filling pump and the oil return pump are connected with oil pipes, and oil supply quantity is adjusted by adjusting the rotation speed of the oil filling pump according to the rotation speed and the torque condition of a driving axle under different working conditions of the whole vehicle, so that oil supply on demand is realized. Specifically, the electric oil pump is an oil pump that uses an electric motor as a power source. The rotor or the impeller in the pump body is driven by the rotation of the motor, so that the liquid is conveyed. The electric oil pump has the following characteristics: the power source is reliable: the motor is used as a power source, so that stable power output can be provided, and the motor is not influenced by liquid pressure. The operation is simple: the flow rate and pressure of the oil pump can be conveniently controlled by controlling the switch of the motor or adjusting the rotation speed of the motor. The conveying capacity is strong: the electric oil pump generally has a large conveying capacity and can meet the requirement on liquid conveying in industrial production.

According to another aspect of the present invention there is provided a vehicle comprising a drive axle lubrication system as described above. A drive axle lubrication system comprising: the speed reducer assembly comprises a drive bevel gear assembly 1 and a differential gear assembly 2, the drive bevel gear assembly 1 is meshed with the differential gear assembly 2, the drive bevel gear assembly 1 comprises a first bearing area 11, the differential gear assembly 2 comprises a second bearing area, and a gear meshing area 31 is formed at the joint of the drive bevel gear assembly 1 and the differential gear assembly 2; the oil storage tank 3 is positioned at one side of the speed reducer assembly; the oil pump assembly comprises an oil pump and an oil pipe, one end of the oil pipe is communicated with the oil storage tank 3, the other end of the oil pipe is communicated with a shell of the speed reducer assembly, and the oil pump is used for conveying oil in the oil storage tank 3 to the first bearing area 11, the second bearing area and the gear meshing area 31 through the oil pipe. By arranging the independent oil storage tank 3 above the speed reducer assembly, lubricating oil in the oil storage tank 3 is guided to a first bearing area of the drive bevel gear assembly 1, a second bearing area of the differential gear assembly 2 and a gear engagement area at the joint of the drive bevel gear assembly 1 and the differential gear assembly 2 through the oil pump and the oil pipe, point-to-point lubrication is realized through the arrangement, and gears in the gear engagement area 31 do not need to stir oil, so that the efficiency of a drive axle is improved, and the efficiency loss during gear lubrication is reduced.

Further, the oil storage tank can be arranged outside the main speed reducer assembly and flexibly arranged according to the whole vehicle space, and is fixedly connected with the axle housing and the reduction housing; the device can also be arranged at the back of the speed reducer shell, and the internal space of the speed reducer shell is required to be enlarged at the moment, so that the arrangement of an upper oil tank, an electric oil pump and an oil guide pipeline is facilitated. This example is overhead type oil tank, places in bridge package upper portion, and is fixed with axle housing fulcrum connection, and the flat design of oil tank reduces Z to the space.

The oil pipe can be made of plastic or iron pipe, and is connected in the form of a plug-in connector by adopting straight pipe or bending treatment as required, and is fixed on the speed reducer shell as required, so that the oil pipe is prevented from falling off and being damaged due to vibration, and lubrication failure is prevented; furthermore, by setting the pipe diameter of the oil filling pipe and the diameter of the oil outlet of the oil filling pipe, the reasonable distribution of lubricating oil at different positions is realized.

The accurate lubrication system can ensure the lubrication requirements of gears and bearings, timely reflux oil through oil, reduce the liquid level to the maximum extent, reduce the oil stirring resistance of the spiral bevel gear and improve the efficiency of the drive axle assembly.

Furthermore, according to the working condition difference of the whole vehicle such as the vehicle speed, the bearing size and the like, the oil injection quantity can be changed in a targeted manner, and the lubricating requirements of different working conditions are met; and the lubricating oil consumption under the working conditions of high speed, light load and the like is facilitated, and the oil stirring resistance is further reduced.

The lubricating system can be applied to a traditional bridge or an electric drive axle, and the lubricating system can reduce the liquid level of an oil pool and reduce the influence of oil stirring loss through a centralized oil supply system. And an electric oil pump or a mechanical oil pump is arranged to realize oil supply and oil return, and oil supply and oil return quantity adjustment is realized as required. The spiral bevel gear pair meshing area, the driving bevel gear bearing, the differential assembly and other positions are all or partially lubricated at fixed points. The spiral bevel gear pair meshing area, the driving bevel gear bearing, the differential assembly and other positions can be fully or partially lubricated.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general terms in the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the invention.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A drive axle lubrication system, comprising:

a speed reducer assembly comprising a drive bevel gear assembly (1) and a differential assembly (2), the drive bevel gear assembly (1) being in engagement with the differential assembly (2), the drive bevel gear assembly (1) comprising a first bearing region (11), the differential assembly (2) comprising a second bearing region, the drive bevel gear assembly (1) and differential assembly (2) being connected with a gear engagement region (31);

an oil storage tank (3), wherein the oil storage tank (3) is positioned at one side of the speed reducer assembly;

the oil pump assembly comprises an oil pump and an oil pipe, one end of the oil pipe is communicated with the oil storage tank (3), the other end of the oil pipe is communicated with a shell of the speed reducer assembly, and the oil pump is used for enabling oil in the oil storage tank (3) to be conveyed to the first bearing area (11), the second bearing area and the gear meshing area (31) through the oil pipe.

2. The drive axle lubrication system of claim 1, wherein the oil line comprises:

a filler pipe (41), wherein one end of the filler pipe (41) is communicated with the oil storage tank (3), a plurality of branch pipes (40) are arranged at the second end of the filler pipe (41), and outlets of the plurality of branch pipes (40) are arranged close to the first bearing area (11), the second bearing area and the gear meshing area (31);

and one end of the oil return pipe (42) is communicated with the oil storage tank (3), and the other end of the oil return pipe (42) extends to the lower part of the speed reducer assembly.

3. The drive axle lubrication system according to claim 2, characterized in that the reduction gear assembly comprises a reduction gear housing (5), the drive bevel gear assembly (1) is located within the reduction gear housing (5), the differential assembly (2) is arranged in a radial direction of the drive bevel gear assembly (1), and the differential assembly (2) is located at one end of the drive bevel gear assembly (1), and the engagement of a first bevel gear (12) located at one end of the drive bevel gear assembly (1) with a second bevel gear (22) of the differential assembly (2) forms the gear engagement region (31).

4. A drive axle lubrication system according to claim 3, characterized in that the second bevel gear (22) of the differential assembly (2) is provided with a left bearing (23) and a right bearing (24) on both sides, respectively, the left bearing (23) and the right bearing (24) being located in a position forming the second bearing area.

5. The drive axle lubrication system according to claim 4, wherein the plurality of branch pipes (40) includes a first branch pipe (411), the first branch pipe (411) includes a first section pipe (4111) and a second section pipe (4112), the first section pipe (4111) is disposed horizontally, the second section pipe (4112) is disposed vertically, a first end of the first section pipe (4111) is in communication with the oil reservoir (3), a second end of the first section pipe (4111) is in communication with a first end of the second section pipe (4112), and a second end of the second section pipe (4112) is located above the left bearing (23).

6. The drive axle lubrication system according to claim 5, wherein a plurality of the branch pipes (40) include a second branch pipe (412), the first branch pipe (411) is disposed at a distance from the second branch pipe (412), the second branch pipe (412) includes a third section pipe (4121) and a fourth section pipe (4122), the third section pipe (4121) is disposed vertically, the fourth section pipe (4122) is disposed horizontally, a first end of the third section pipe (4121) is in communication with the oil reservoir (3), a second end of the third section pipe (4121) is in communication with a first end of the fourth section pipe (4122), the fourth section pipe (4122) is disposed above one side of the right bearing (24), a plurality of oil holes (4123) are provided in the fourth section pipe (4122), and a plurality of oil holes (4123) are disposed at intervals.

7. A drive axle lubrication system according to claim 3, characterized in that the drive bevel gear assembly (1) comprises a main tooth inner bearing (14) and a main tooth outer bearing (13), the main tooth inner bearing (14) and the main tooth outer bearing (13) are sleeved on the central shaft of the drive bevel gear assembly (1), the main tooth inner bearing (14) is arranged close to the first bevel gear (12), the main tooth outer bearing (13) is arranged at a distance from the main tooth inner bearing (14), and the positions of the main tooth inner bearing (14) and the main tooth outer bearing (13) form the first bearing area (11).

8. The drive axle lubrication system according to claim 6, wherein the plurality of branch pipes (40) further comprises a third branch pipe (413), the first end of the third branch pipe (413) being in communication with the second end of the third section pipe (4121) and the first end of the fourth section pipe (4122) of the second branch pipe (412), the second end of the third branch pipe (413) extending in an opposite direction of the fourth section pipe (4122) to the first bearing area (11).

9. The drive axle lubrication system according to claim 8, wherein the third branch pipe (413) is provided with a plurality of oil filling tubules (4131) above the gear engagement region (31), the plurality of oil filling tubules (4131) extending to the outside of the second bevel gear (22) of the differential assembly (2).

10. The drive axle lubrication system of claim 2, wherein the oil pump includes:

an oil filling pump (51), wherein the oil filling pump (51) is arranged at one end of the oil filling pipe (41) close to the oil storage tank (3);

and the oil return pump (52) is arranged at one end of the oil return pipe (42) close to the oil storage tank (3).

11. A vehicle comprising a drive axle lubrication system according to any one of claims 1 to 10.