CN112460239A

CN112460239A - Axle and vehicle

Info

Publication number: CN112460239A
Application number: CN202011372882.6A
Authority: CN
Inventors: 于吉龙; 周新华; 李海潮; 高明臣; 肖鸿飞
Original assignee: Qingdao Qingte Zhongli Axle Co ltd; Beijing Foton Daimler Automobile Co Ltd
Current assignee: Qingdao Qingte Zhongli Axle Co ltd; Beijing Foton Daimler Automobile Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-03-09

Abstract

The invention discloses an axle, comprising: an axle housing, the axle housing includes: the rear shell is connected to the rear side of the front shell and defines a mounting cavity with the front shell; the transmission shaft is arranged in the mounting cavity; a differential disposed on the driveshaft and including a differential housing; an oil blocking member disposed at the differential case and extending toward the rear case so that the lubricating oil at the rear of the propeller shaft flows to the differential through the oil blocking member. Through being provided with between differential mechanism casing and backshell and keeping off oil spare, the lubricating oil that rearmounted bearing pump came out can flow to keeping off oil spare department, then flows to differential mechanism through keeping off oil spare to can lubricate differential mechanism, prevent that wear and tear, sintering scheduling problem appear in differential mechanism's part.

Description

Axle and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to an axle and a vehicle.

Background

In the prior art, an axle cannot form a closed structure due to the gap between a transmission gear and a differential mechanism, lubricating oil can flow away from the gap when flowing through, so that the oil level of the gear cannot be improved, the inter-axle differential mechanism cannot be lubricated more sufficiently, and the problems of abrasion, sintering and the like of inter-axle differential mechanism parts can be caused.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to propose an axle which allows lubrication of the differential, preventing problems of wear, sintering, etc. of the components of the differential.

The invention further provides a vehicle.

The axle according to the invention comprises: an axle housing, the axle housing includes: the rear shell is connected to the rear side of the front shell and defines a mounting cavity with the front shell; the transmission shaft is arranged in the mounting cavity; a differential disposed on the driveshaft and including a differential housing; an oil blocking member disposed at the differential case and extending toward the rear case so that the lubricating oil at the rear of the propeller shaft flows to the differential through the oil blocking member.

According to the axle, the oil blocking piece is arranged between the differential shell and the rear shell, lubricating oil pumped out by the rear bearing can flow to the oil blocking piece and then flows to the differential through the oil blocking piece, so that the differential can be lubricated, and the problems of abrasion, sintering and the like of components of the differential are prevented.

In some examples of the present invention, one end of the oil retainer is fixed to the differential case and the other end of the oil retainer has a first gap from the rear case.

In some examples of the present invention, the oil retainer is welded at one end to the differential case and has a thickness smaller than that of the differential case.

In some examples of the present invention, the oil blocking member is configured as an arc-shaped plate structure, and a central angle of the arc-shaped plate structure is α, where α satisfies the following relation: alpha is more than or equal to 90 degrees and less than or equal to 360 degrees.

In some examples of the invention, the axle further comprises: the transmission gear is arranged on the transmission shaft, the transmission gear is arranged in the installation cavity and located on one side, facing the front shell, of the differential, and the first sealing element is arranged between the transmission gear and the differential shell.

In some examples of the present invention, the first seal is an oil seal, and an oil seal seat is provided to protrude from a side of the transmission gear toward the differential case, the oil seal being provided between the oil seal seat and the differential case.

In some examples of the present invention, a side of the differential case facing the transmission gear is provided with a boss, and a second gap is left between an end face of the boss and the transmission gear to restrict axial movement of the differential case.

In some examples of the invention, the axle further comprises: a second sealing member disposed between the oil retainer and the rear case.

In some examples of the present invention, the rear case is formed with a first step, the second sealing member is an oil seal and is disposed at the first step, and a second step is formed between the oil blocking member and the differential case, and the oil seal is fitted with the second step.

The vehicle according to the present invention includes: the axle described above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic illustration of a construction of an axle according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is another schematic structural view of an axle according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3;

fig. 5 is a schematic view of the oil blocking member when collecting oil.

Reference numerals:

an axle 1;

an axle housing 10; a front case 11; a rear case 12; a mounting cavity 13; a first step 14;

a drive shaft 20; a transmission gear 30; an oil seal seat 31;

a differential mechanism 40; the planetary gear shafts 41; the planetary gears 42;

a differential case 43; a boss 44; an oil retainer 50; a second step 51;

a first seal 60; a second seal 70; a rear bearing 80.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

An axle 1 according to an embodiment of the invention is described below with reference to fig. 1-5.

As shown in fig. 1 to 4, an axle 1 according to an embodiment of the present invention includes: an axle housing 10, a propeller shaft 20, a differential 40, and an oil retainer 50. The axle housing 10 includes: the front shell 11 and the rear shell 12, the rear shell 12 is connected at the rear side of the front shell 11, and the rear shell 12 and the front shell 11 define a mounting cavity 13, and the transmission shaft 20 extends into the mounting cavity 13 from the front shell 11.

As shown in fig. 1 to 4, the axle 1 further includes a rear bearing 80, the rear bearing 80 is disposed in the mounting cavity 13, an inner ring of the rear bearing 80 is fixed to a rear step portion of the transmission shaft 20, and the rear bearing 80 pumps lubricating oil into the mounting cavity 13 by centrifugal action. The differential mechanism 40 is disposed on the transmission shaft 20, the differential mechanism 40 is disposed on a side of the transmission gear 30 facing away from the front housing 11, the differential mechanism 40 is provided with a differential housing 43, an oil blocking member 50 is disposed on the differential housing 43, and the oil blocking member 50 extends toward the rear housing 12, the oil blocking member 50 can prevent or slow down the outflow of the lubricating oil from a gap between the differential housing 43 and the rear housing 12, so that the lubricating oil can flow to the oil blocking member 50 after entering the installation cavity 13, and then can enter the differential mechanism 40 through the oil blocking member 50.

Thus, by providing the oil baffle 50 between the differential case 43 and the rear case 12, the lubricating oil pumped by the rear bearing 80 can flow to the oil baffle 50 and then to the differential 40 through the oil baffle 50, thereby lubricating the differential 40 and preventing the components of the differential 40 from being worn and sintered.

As shown in fig. 1 and 2, one end of the oil blocking member 50 is fixed to the differential case 43, and a first gap is left between the other end of the oil blocking member 50 and the rear case 12. One end of the oil blocking member 50 is fixed on the differential case 43, the lubricating oil pumped by the rear bearing 80 can flow to the oil blocking member 50 along the rear case 12, and a first gap is reserved between the rear cases 12 at the other end of the oil blocking member 50, and the first gap is small, so that the loss of the lubricating oil from the first gap can be reduced, the lubricating time of the differential 40 can be prolonged, the lubricating can be better and sufficient, and the problems of abrasion, sintering and the like of the components of the differential 40 can be better reduced.

Specifically, as shown in fig. 1 to 4, one end of the oil deflector 50 is welded to the differential case 43, and the thickness of the oil deflector 50 is smaller than that of the differential case 43. One end of the oil blocking member 50 is welded to the differential case 43, so that the stability of the oil blocking member 50 can be ensured, and the oil blocking member 50 is prevented from rolling over when the lubricating oil passes through the oil blocking member 50. The thickness of the oil blocking member 50 is smaller than that of the differential case 43, so that the other end of the oil blocking member 50 can be more conveniently disposed on the rear case 12, and the volume of the oil blocking member 50 can be reduced, thereby avoiding more material waste.

According to an alternative embodiment of the present invention, as shown in fig. 5, the oil blocking member 50 is configured as an arc-shaped plate structure, and the arc-shaped plate structure corresponds to a central angle α, where α satisfies the relationship: alpha is more than or equal to 90 degrees and less than or equal to 360 degrees. The oil blocking piece 50 is constructed into an arc-shaped plate-shaped structure, lubricating oil can be concentrated in the oil blocking piece 50, the sputtering and the loss of the lubricating oil are avoided, and the central angle range corresponding to the arc-shaped plate-shaped structure is arranged as follows: alpha is more than or equal to 90 degrees and less than or equal to 360 degrees, the oil baffle piece 50 can meet the flow rate and the flow velocity of the lubricating oil, and thus the splashing and the loss of the lubricating oil can be better avoided.

Alternatively, as shown in fig. 1 to 4, the differential 40 includes: planet shafts 41 and planet gears 42, the planet shafts 41 being provided on the propeller shaft 20, the planet gears 42 being provided on the planet shafts 41, and a differential case 43 being provided outside the planet shafts 41 and the planet gears 42. The planet shaft 41 is arranged on the transmission shaft 20, the internal spline of the planet shaft 41 is meshed with the rear spline of the transmission shaft 20, the planet gear 42 is arranged on the planet shaft 41, the inner hole of the planet gear 42 is matched with the shaft diameter of the planet shaft 41, and the differential shell 43 is arranged on the outer sides of the planet shaft 41 and the planet gear 42, so that the planet shaft 41 and the planet gear 42 can be prevented from being damaged due to the contact with other objects.

Further, the axle 1 further includes: the transmission gear 30 and the first sealing member 60, the transmission gear 30 is arranged on the transmission shaft 20, the transmission gear 30 is arranged in the installation cavity 13, the transmission gear 30 is positioned on one side of the differential mechanism 40 facing the front shell 11, and the first sealing member 60 is arranged between the transmission gear 30 and the differential mechanism shell 43. The transmission gear 30 is arranged on the transmission shaft 20, the transmission gear 30 is driven by the transmission shaft 20 to transmit, the transmission gear 30 is arranged in the installation cavity 13, the transmission gear 30 is located on one side, facing the front shell 11, of the differential mechanism 40, and the transmission gear 30 and the front shell 11 are arranged at intervals, so that the transmission gear 30 can be prevented from interfering with the front shell 11 during transmission, and the transmission gear 30 and the front shell 11 can be prevented from being damaged to cause extra loss.

In addition, the first sealing element 60 is arranged between the transmission gear 30 and the differential case 43, so that a closed structure can be formed among the transmission gear 30, the differential case 43 and the first sealing element 60, lubricating oil is prevented from flowing out from a gap between the transmission gear 30 and the differential case 43, the oil level of the gear can be improved, the lubricating oil can lubricate the planet gear shaft 41 and the planet gear 42, the differential 40 is lubricated more fully, and the problems of abrasion, sintering and the like of components of the differential 40 can be reduced better.

As shown in fig. 1 to 4, the first seal 60 is an oil seal, and an oil seal seat 33 is provided to protrude from one side of the transmission gear 30 facing the differential case 43, and the oil seal is provided between the oil seal seat 33 and the differential case 43. The first sealing member 60 is an oil seal which can better prevent the lubricating oil from flowing out from the gap between the differential case 43 and the transmission gear 30, while the transmission gear 30 is convexly provided with an oil seal seat 33 towards one side of the differential case 43, and the oil seal is arranged between the oil seal seat 33 and the differential case 43, so that the oil seal can block the gap between the transmission gear 30 and the differential case 43 and prevent the lubricating oil from flowing out from the gap.

Of course, as shown in fig. 2 and 4, the differential case 43 is provided with a boss 44 on a side facing the transmission gear 30, with a second clearance left between an end face of the boss 44 and the transmission gear 30 to restrict axial movement of the differential case 43. A boss 44 is provided on the side of the differential case 43 facing the transmission gear 30, and a second gap is left between the end face of the boss 44 and the transmission gear 30, so that the differential case 43 is prevented from floating and moving axially, and outflow of the lubricating oil from the second gap can be reduced.

In addition, as shown in fig. 3 and 4, the axle 1 further includes: and a second seal 70, the second seal 70 being disposed between the oil retainer 50 and the rear case 12. The second sealing member 70 is disposed between the oil blocking member 50 and the rear case 12, and the second sealing member 70, the oil blocking member 50 and the rear case 12 may also form a sealed structure, so that when the lubricating oil pumped by the rear bearing 80 is introduced into the differential case 40 through the sealing structure formed by the second sealing member 70 for lubrication, the sealed structure formed by the transmission gear 30, the differential case 43 and the first sealing member 60 and the sealed structure formed by the second sealing member 70, the oil blocking member 50 and the rear case 12 prevent the lubricating oil from flowing out from the gap between the transmission gear 30 and the differential case 43 and the gap between the oil blocking member 50 and the rear case 12, thereby improving the gear oil level, lubricating the differential case 40 more sufficiently, and reducing the problems of wear, sintering and the like of the components of the differential case 40.

Specifically, as shown in fig. 3 and 4, the rear case 12 is formed with a first step 14, the second seal 70 is an oil seal, and the second seal 70 is disposed at the first step 14, and a second step 51 is formed between the oil blocking member 50 and the differential case 43, and the oil seal is fitted with the second step 51. Second sealing member 70 is the oil blanket, and the oil blanket can prevent better that lubricating oil from keeping off the clearance loss between oil piece 50 and the backshell 12, and second sealing member 70 sets up in first step 14 department to the oil blanket cooperatees with second step 51, can make second sealing member 70, keep off and form inclosed structure between oil piece 50 and the backshell 12 like this, thereby can improve gear oil liquid level, make differential mechanism 40 lubricated better abundant, reduce the wearing and tearing of differential mechanism 40 part, sintering scheduling problem.

A vehicle according to an embodiment of the present invention includes: the axle 1 described in the above embodiments.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An axle, comprising:

an axle housing, the axle housing includes: the rear shell is connected to the rear side of the front shell and defines a mounting cavity with the front shell;

the transmission shaft is arranged in the mounting cavity;

a differential disposed on the driveshaft and including a differential housing;

an oil blocking member disposed at the differential case and extending toward the rear case so that the lubricating oil at the rear of the propeller shaft flows to the differential through the oil blocking member.

2. The axle of claim 1, wherein the oil dam is secured at one end to the differential housing and at the other end with a first clearance from the rear housing.

3. The axle of claim 2 wherein the oil dam is welded at one end to the differential housing and has a thickness less than the thickness of the differential housing.

4. The axle according to claim 1, wherein the oil baffle is configured as an arc-shaped plate-shaped structure, the arc-shaped plate-shaped structure corresponds to a central angle α, and α satisfies the relation: alpha is more than or equal to 90 degrees and less than or equal to 360 degrees.

5. The axle of claim 1, further comprising: the transmission gear is arranged on the transmission shaft, the transmission gear is arranged in the installation cavity and located on one side, facing the front shell, of the differential, and the first sealing element is arranged between the transmission gear and the differential shell.

6. The axle of claim 5, wherein the first seal is an oil seal, and an oil seal seat is provided to project from the drive gear toward a side of the differential housing, the oil seal being disposed between the oil seal seat and the differential housing.

7. The axle of claim 5 wherein a side of the differential housing facing the drive gear is provided with a boss, a second clearance being left between an end face of the boss and the drive gear to limit axial movement of the differential housing.

8. The axle of claim 5, further comprising: a second sealing member disposed between the oil retainer and the rear case.

9. The axle of claim 8, wherein the rear housing defines a first step, the second seal is an oil seal and is disposed at the first step, and a second step is defined between the oil retainer and the differential housing, the oil seal cooperating with the second step.

10. A vehicle, characterized by comprising: an axle as claimed in any one of claims 1 to 9.