CN217898738U

CN217898738U - Lubricating structure for improving lubrication of differential mechanism and transmission

Info

Publication number: CN217898738U
Application number: CN202222309720.9U
Authority: CN
Inventors: 董立伟; 汪文华; 文新海; 张磊; 肖婷玲; 周刚; 殷金菊
Original assignee: Magna PT Powertrain Jiangxi Co Ltd
Current assignee: Magna PT Powertrain Jiangxi Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-25
Anticipated expiration: 2032-08-31

Abstract

The utility model discloses a lubrication structure and a transmission for improving differential lubrication, relating to the technical field of automobile parts, wherein the lubrication structure is used on a differential device, the differential device comprises a differential shell, the lubrication structure comprises a spiral oil groove, and a first through hole and a second through hole which are arranged on the differential shell; when the differential device is rotationally connected in the transmission shell, a lubricating medium in the transmission shell penetrates through the first through hole, the spiral oil groove and the second through hole to lubricate a bearing and an oil seal on the differential device; a lubricating oil cavity for lubricating medium to move is arranged between the differential device and the transmission shell. Through the arrangement, the problem of differential lubrication is solved under the condition that an independent lubricating device or an active lubricating system is not added and the oil quantity is not increased, and the design difficulty and the development cost of the lubricating system are reduced.

Description

Lubricating structure for improving lubrication of differential mechanism and transmission

Technical Field

The utility model relates to an automobile parts technical field specifically is an improve lubricated structure of differential mechanism and derailleur.

Background

Automotive differentials may cause left and right (or front and rear) drive wheels to rotate at different speeds. The special function of the lubricating system determines that each part needs to transmit complex and severe motion and power, and the stable and reliable lubricating system is the premise of ensuring the reliable function of the lubricating system.

To match customer layout, the differential acts as a support for the axle shafts, and then the differential bearings and oil seals have to be kept away from the differential body, lubrication of the distal bearings, oil seals, etc. being a difficult point in the development of transmission lubrication systems.

In order to ensure good lubrication of the differential assembly, particularly of the distal bearings, oil seals and the like, the differential lubrication system is designed to solve the problem of oil collection and lubrication paths. At present, in the development of the speed changer, one method is to increase the oil quantity to ensure that the oil level is over the lower edge of the oil seal, thereby forming an initial oil film. The defects are that the cost is increased, the oil stirring loss of the gear is increased, the transmission efficiency of the whole machine is reduced, and in the running process, the oil level is reduced, and the problem of a lubricating path is not solved, so that the lubricating problem of a differential assembly, particularly a bearing and an oil seal cannot be fundamentally solved; the other one is an additional lubricating device or an active lubricating system, the structure is complex, the arrangement is difficult, the reliability of the whole machine is reduced to a certain extent, and the cost is improved.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing an improve lubricated lubricating structure of differential mechanism and derailleur to solve in the background art and not increasing the oil mass, under the prerequisite that does not additionally increase lubricating arrangement or initiative lubricating system, realize carrying out lubricated problem to bearing, oil blanket in the differential mechanism assembly.

One aspect of the present invention is to provide a lubrication structure for improving lubrication of a differential device, which is used for a differential device, where the differential device includes a differential housing, and the lubrication structure includes a helical oil groove, and a first through hole and a second through hole provided in the differential housing;

when the differential device is rotationally connected in a transmission shell, a lubricating medium in the transmission shell penetrates through the first through hole, the spiral oil groove and the second through hole to lubricate a bearing and an oil seal on the differential device;

and a lubricating oil cavity for lubricating medium to move is arranged between the differential device and the transmission shell.

Further, the differential device further comprises a half shaft, wherein the half shaft comprises a left half shaft and a right half shaft, the differential shell is arranged between the left half shaft and the right half shaft, and the spiral oil groove is arranged on one of the differential shell and the half shaft.

Further, the end face of the differential case close to the right half shaft is connected with the end face of the right half shaft in a sliding manner.

Further, the lubricating structure further comprises a boss arranged on the transmission housing;

wherein the oil gallery is formed between an outer side of the differential device and the transmission case by the boss when the differential device is rotatably coupled within the transmission case.

Further, the differential device also comprises a differential component group, wherein the differential component group is arranged in the differential shell;

wherein one end of the helical oil groove is right opposite to the differential component group.

Further, the differential component group comprises a side gear and a gasket, and one end of the spiral oil groove is opposite to the side gear and the gasket, so that a part of the lubricating medium entering the spiral oil groove is transmitted towards the direction of the side gear and the gasket.

Further, the spiral oil groove is rotated in a direction opposite to the rotation direction of the differential device.

Further, the first through holes and the second through holes are at least two pairs and are symmetrically arranged around the center of the differential case to form a crisscross structure.

Further, an oil storage cavity is arranged in the spiral oil groove, so that at least part of the lubricating medium is stored through the oil storage cavity.

Another aspect of the present invention is to provide a transmission, which includes a lubrication structure as described above, wherein the lubrication structure is disposed on the transmission.

Compared with the prior art, the beneficial effects of the utility model are that:

compared with the prior art, the utility model discloses in do not increase independent lubricating arrangement or initiative lubricating system to and under the condition that does not increase the oil mass, realize fundamentally solving the lubricated problem of differential mechanism, thereby reduced lubricating system's design degree of difficulty and development cost, specifically speaking, including setting up first through-hole and the second through-hole on the differential mechanism casing in this lubricating arrangement, and be equipped with the spiral oil groove with first through-hole and second through-hole through-connection in the inside of differential mechanism casing, when the differential mechanism device rotates and connects in the transmission casing, the lubricated medium in the transmission casing wears to establish first through-hole, spiral oil groove and second through-hole and lubricates bearing and the oil blanket on the differential mechanism device; a lubricating oil cavity for lubricating medium to move is arranged between the differential device and the transmission shell.

Drawings

Fig. 1 is a schematic view of the overall structure of the differential device;

FIG. 2 is an assembled schematic view of the differential housing and differential component set;

FIG. 3 is a partial cross-sectional view of the differential case of FIG. 1;

FIG. 4 is a partial cross-sectional view of the differential device and transmission housing.

Fig. 5 is a schematic structural view of the spiral oil groove.

In the figure: 10. a differential case; 11. a first through hole; 12. a helical oil groove; 13. a second through hole; 14. a left half shaft; 15. a right half shaft; 16. a bearing; 17. oil sealing; 18. a lubricating oil cavity; 19. an oil storage chamber; 20. a differential component group; 21. a side gear; 22. a gasket; 30. a transmission housing; 31. and (4) a boss.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

First embodiment

Referring to fig. 1 to 5, a lubrication structure for improving lubrication of a differential device according to an embodiment of the present invention is shown, and the differential device includes a differential housing 10.

In order to solve the problem in the prior art that the bearings 16 and the oil seals 17 in the differential assembly are lubricated without increasing the oil amount or additionally increasing a re-lubrication device or an active lubrication system, the lubrication structure in this embodiment includes a spiral oil groove 12, and a first through hole 11 and a second through hole 13 which are arranged on the differential housing 10, and the spiral oil groove 12 is arranged inside the differential housing 10; when the differential device is rotatably connected in the transmission housing 30, a lubricating medium in the transmission housing 30 penetrates through the first through hole 11, the spiral oil groove 12 and the second through hole 13 to lubricate a bearing 16 and an oil seal 17 on the differential device; a lubricating oil chamber 18 is provided between the differential device and the transmission housing 30 for the movement of a lubricating medium.

Specifically, the lubricating structure further includes a boss 31 provided on the transmission case 30, when the differential device is rotatably connected in the transmission case 30, the boss 31 is used to form the lubricating oil chamber 18 between the outside of the differential device and the transmission case 30, that is, when the differential device rotates in the transmission case 30, the differential device will stir the lubricating medium, the stirred lubricating medium enters the helical oil groove 12 through the first through hole 11, the lubricating medium in the helical oil groove 12 is thrown out of the differential case 10 through the second through hole 13 under the action of centrifugal force, and finally the lubricating oil chamber 18 is used to lubricate the bearing 16 and the oil seal 17, it should be noted that the helical oil groove 12 rotates in the opposite direction to the rotation direction of the differential device, and the lubricating medium can be lubricating oil in the prior art, in some preferred embodiments, the end face of the long shaft of the differential case 10 is attached to the shaft shoulder of the half shaft, and the oil seal 17 is installed on the half shaft, it should be noted that the boss 31 is added on the transmission case 30 near the end of the long shaft of the differential case 10, and the bore diameter of the oil seal 17 is slightly larger than the inner ring of the oil seal 17.

Further, the first through holes 11 and the second through holes 13 are at least two pairs, and are symmetrically arranged around the center of the differential case 10 to form a crisscross structure, and the reliability of the lubricating medium flowing into the helical oil groove 12 is ensured by the arrangement of a plurality of through holes, in some embodiments, the first through holes 11 may be radial stepped holes or inclined holes; the second through-holes 13 may be four cross-symmetric U-shaped grooves in the circumferential direction of the long-axis end face of the differential case 10.

In practice, the differential device further includes a differential component assembly 20, the differential component assembly 20 is disposed in the differential case 10, the differential component assembly 20 includes a side gear 21 and a spacer 22, one end of the helical oil groove 12 is opposite to the side gear 21 and the spacer 22, so that a part of the lubricating medium entering the helical oil groove 12 is transmitted toward the side gear 21 and the spacer 22, that is, a part of the lubricating medium entering the helical oil groove 12 will act on the differential component assembly 20 to ensure the normal operation of the differential device, in some preferred embodiments, two windows may be further disposed in the middle of the differential case 10, that is, a part of the lubricating medium enters the inside of the differential case 10 through the windows, and a part of the lubricating medium flows into the helical oil groove 12.

In addition, the differential device further comprises half shafts, the half shafts comprise a left half shaft 14 and a right half shaft 15, the differential shell 10 is arranged between the left half shaft 14 and the right half shaft 15, and the spiral oil groove 12 is arranged on one of the differential shell 10 and the half shafts, in practical situations, in order to realize special customization of users, the bearings 16 and the oil seals 17 on the differential device are lubricated reasonably for guaranteeing, that is, the spiral oil groove 12 can be switched between the half shafts and the differential shell 10 to meet requirements of the users. In some embodiments, the helical oil groove 12 may be mounted on the differential case 10; in addition, it should be noted that, when the helical oil grooves 12 are mounted on the axle shafts, the left axle shaft 14 and the right axle shaft 15 are each provided with the helical oil grooves 12.

Further, the end surface of the differential case 10 close to the right half shaft 15 is connected with the end surface of the right half shaft 15 in a sliding manner, and in practical situations, the right half shaft 15 can be supported, so that a customer does not need to arrange a half shaft support bracket, and certain cost is reduced.

Further, an oil reservoir chamber 19 is provided in the helical oil groove 12 to store at least a part of the lubricating medium through the oil reservoir chamber 19.

In summary, when the differential device agitates the lubricating medium, a part of the lubricating medium enters the interior of the differential case 10 through the window on the differential case 10, a part of the lubricating medium falls back and flows through the first through hole 11, enters the helical oil groove 12, passes through the helical oil groove 12, flows to the side gear 21 and the spacer 22, flows to the end of the long axis of the differential case 10, and is thrown by centrifugal force via the second through hole 12 into the lubricating oil chamber 18 composed of the transmission case 30, the boss 31, the oil seal 17 and the half shaft, referring to fig. 4, the lubricating oil chamber 18, the oil storage chamber 19, and the helical oil groove 12 constitute an oil chamber structure covering the lubricating path, and particularly, after long-time parking or idling, sufficient oil is provided for lubrication in the case of severe wear at the start-up to low-speed stage.

In conclusion, compared with the lubricating method for the oil seal and the bearing in the prior art, the lubricating structure in the first novel embodiment at least has the following beneficial effects:

1. compared with the prior art, the utility model discloses at the condition that does not increase independent lubricating arrangement or initiative lubricating system, and do not increase the oil mass under, guarantee that derailleur and differential mechanism main part are unchangeable, provide the support for customer's semi-axis, match customer's semi-axis in a flexible way, realize fundamentally solving the lubricated problem of differential mechanism, thereby lubricating system's the design degree of difficulty and development cost have been reduced, specifically speaking, this lubricating arrangement is including setting up first through-hole 11 and the second through-hole 13 on differential mechanism casing 10, and be equipped with the spiral oil groove 12 with first through-hole 11 and second through-hole 13 through connection in the inside of differential mechanism casing 10, when differential mechanism rotates and connects in transmission casing 30, the lubricated medium in transmission casing 30 wears to establish first through-hole 11, spiral oil groove 12 and second through-hole 13 and lubricates bearing 16 and oil blanket 17 on the differential mechanism; a lubricating oil chamber 18 is provided between the differential device and the transmission housing 30 for the movement of a lubricating medium.

Second embodiment

Referring to fig. 1 to 5 again, a transmission according to a second embodiment of the present invention is shown, and the transmission provided in this embodiment includes a lubricating structure as described in the first embodiment, wherein the lubricating structure is disposed on the transmission.

In summary, the transmission provided by the second embodiment of the present invention has at least the following advantages compared to the lubricating structure in the first embodiment:

in the present embodiment, the lubrication structure is provided in the transmission to lubricate the bearing 16 and the oil seal 17 in the differential.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A lubrication structure for improving lubrication of a differential is used for a differential device, the differential device comprises a differential shell, and the lubrication structure is characterized by comprising a spiral oil groove, a first through hole and a second through hole, wherein the first through hole and the second through hole are formed in the differential shell;

2. The lubrication structure for improving lubrication of a differential gear according to claim 1, wherein: the differential device further comprises half shafts, each half shaft comprises a left half shaft and a right half shaft, the differential shell is arranged between the left half shaft and the right half shaft, and the spiral oil groove is formed in one of the differential shell and the half shafts.

3. The lubrication structure for improving lubrication of a differential gear according to claim 2, wherein: the end face of the differential shell close to the right half shaft is connected with the end face of the right half shaft in a sliding mode.

4. The lubrication structure for improving lubrication of a differential gear according to claim 3, wherein: the lubricating structure further comprises a boss arranged on the transmission shell;

5. The lubrication structure for improving lubrication of a differential gear according to claim 1, wherein: the differential device further comprises a differential component set, and the differential component set is arranged in the differential shell;

wherein one end of the spiral oil groove faces the differential component group.

6. The lubrication structure for improving lubrication of a differential gear according to claim 5, wherein: the differential component set comprises a side gear and a gasket, wherein one end of the spiral oil groove is right opposite to the side gear and the gasket, so that a part of the lubricating medium entering the spiral oil groove is transmitted towards the direction of the side gear and the gasket.

7. The lubrication structure for improving lubrication of a differential gear according to claim 1, wherein: the spiral oil groove has a rotation direction opposite to a rotation direction of the differential device.

8. The lubrication structure for improving lubrication of a differential gear according to claim 1, wherein: the first through holes and the second through holes are at least two pairs and are symmetrically arranged around the center of the differential case to form a crisscross structure.

9. The lubrication structure for improving lubrication of a differential gear according to claim 1, wherein: an oil storage cavity is arranged in the spiral oil groove, so that at least part of the lubricating medium is stored through the oil storage cavity.

10. A transmission comprising the lubrication structure for improving lubrication of a differential gear according to any one of claims 1 to 9, wherein the lubrication structure is provided on the differential gear.