CN214083708U

CN214083708U - Driving axle wheel edge assembly

Info

Publication number: CN214083708U
Application number: CN202023180841.5U
Authority: CN
Inventors: 冯涛; 王国民; 郭震
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-31
Anticipated expiration: 2030-12-25

Abstract

The utility model discloses a drive axle wheel edge assembly, which belongs to the technical field of vehicles and comprises a wheel hub, a wheel edge reducer shell and a first sealing ring, wherein the wheel hub comprises a main body part and a flange part fixed on the outer wall of the main body part; the wheel side speed reducer is characterized in that a first end of the wheel side speed reducer shell is provided with an assembly hole, one end of the main body part is inserted into the assembly hole, the end part of the first end abuts against the flange part, an annular groove is formed in the end face of the first end, and the groove, the main body part and the flange part form an accommodating hole; the first sealing ring is sleeved outside the main body part and is positioned in the accommodating hole. The utility model provides a transaxle wheel limit assembly can prevent the condition of the first sealing washer of wheel limit speed reducer shell fish tail from appearing, has reduced the probability that early inefficacy appears in first sealing washer, improves the sealed effect of first sealing washer.

Description

Driving axle wheel edge assembly

Technical Field

The utility model relates to the technical field of vehicles, especially, relate to a transaxle wheel limit assembly.

Background

The wheel-side assembly of the drive axle comprises a wheel hub and a wheel-side speed reducer shell, wherein the wheel-side speed reducer shell is provided with an assembly hole, one end of the wheel hub is inserted into the assembly hole of the wheel-side speed reducer shell, namely, the wheel hub and the wheel-side speed reducer shell are assembled through a shaft hole.

In the prior art, an O-shaped sealing ring is arranged between a hub and a hub reduction gear shell to seal a gap between the hub and the hub reduction gear shell. Specifically, the outer wall of the one end of the hub is provided with a shaft diameter groove, and the O-shaped sealing ring is located in the shaft diameter groove and is in contact with the inner wall of the assembling hole to achieve sealing. When the hub, the hub reduction gear shell and the O-shaped sealing ring are assembled, the O-shaped sealing ring is sleeved on the hub and is arranged in the shaft diameter groove, then the hub reduction gear shell is sleeved at one end of the hub, and the hub reduction gear shell is pushed until one end of the hub reduction gear shell is contacted with the flange end face of the hub. However, the distance between the inner wall of the hub reduction gear shell and the outer wall of the hub is small, so that when the hub reduction gear shell is pushed, a sharp corner at one end of the hub reduction gear shell easily scratches the O-shaped sealing ring, the O-shaped sealing ring is caused to fail early, and the effect of sealing the hub and the hub reduction gear shell by the O-shaped sealing ring is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transaxle wheel limit assembly can prevent the condition of the first sealing washer of wheel limit speed reducer shell fish tail from appearing, has reduced the probability that early inefficacy appears in first sealing washer, improves the sealed effect of first sealing washer.

As the conception, the utility model adopts the technical proposal that:

a drive axle wheel-rim assembly comprising:

the hub comprises a main body part and a flange part fixed on the outer wall of the main body part;

the hub reduction gear comprises a hub reduction gear shell, wherein a first end of the hub reduction gear shell is provided with an assembly hole, one end of a main body part is inserted into the assembly hole, the end part of the first end abuts against the flange part, the end surface of the first end is provided with an annular groove, and the groove, the main body part and the flange part form an accommodating hole;

the first sealing ring is sleeved outside the main body part and is positioned in the accommodating hole.

Optionally, the hub reduction gear casing includes a main casing portion and an extending portion connected to an outer wall of one end of the main casing portion, the assembly hole and the groove are respectively disposed on the main casing portion, and the extending portion abuts against the flange portion.

Optionally, the surface of the outer extension portion facing the flange portion has a groove structure, and the drive axle rim assembly further includes a second seal ring installed in the groove structure.

Optionally, still include the brake drum, the brake drum includes first connecting portion and the second connecting portion of interconnect, first connecting portion cover is established outside the main part, the second connecting portion cover is established epitaxial portion reaches outside the flange portion.

Optionally, the wheel hub has an oil collecting cavity, be equipped with on the main part communicate in the axial oil drain hole of oil collecting cavity, be equipped with on the flange portion communicate in the first radial oil drain hole of axial oil drain hole, be equipped with on the second connecting portion communicate in the second radial oil drain hole of first radial oil drain hole.

Optionally, the diameter of the second radial oil drain hole is larger than the diameter of the first radial oil drain hole.

Optionally, the end face of the flange portion has a first groove, the inner wall of the second connecting portion has a second groove opposite to the first groove, the first groove and the second groove form a first accommodating hole, the drive axle wheel rim assembly further includes a third sealing ring, and the third sealing ring is located in the first accommodating hole.

Optionally, be equipped with first through-hole on the flange portion, be equipped with on the epitaxial portion and correspond to the second through-hole of first through-hole, have on the first connecting portion and correspond to the third through-hole of second through-hole, drive axle wheel limit assembly still includes the tire bolt, the tire bolt wears to locate in first through-hole, the second through-hole reaches the third through-hole.

Optionally, the sealing plate is arranged between the flange portion and the extending portion in a pressing mode.

Optionally, the main body portion includes a large diameter section connected to the flange portion and a small diameter section connected to the large diameter section, a radial dimension of the large diameter section is larger than a radial dimension of the small diameter section, and an outer wall of the large diameter section is in contact with a hole wall of the fitting hole.

The utility model provides a transaxle wheel limit assembly has following beneficial effect at least:

the terminal surface of the first end of hub reduction gear shell is equipped with the recess, and when the tip of first end and flange portion contact, a lateral wall of recess and a lateral wall contact of first sealing washer for the closed angle of hub reduction gear shell can not contact with first sealing washer, and then prevents the condition of the first sealing washer of hub reduction gear shell fish tail from appearing, has reduced the probability that early inefficacy appears in first sealing washer, has improved the effect of the sealed wheel hub of first sealing washer and hub reduction gear shell.

Drawings

Fig. 1 is a schematic cross-sectional view of a drive axle wheel-rim assembly provided by an embodiment of the present invention;

fig. 2 is an enlarged schematic view of fig. 1 at a according to the present invention;

fig. 3 is a schematic cross-sectional view of a wheel hub provided by an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a hub reduction gear housing according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a brake drum provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic partial cross-sectional view of a wheel-side assembly of a drive axle according to an embodiment of the present invention.

In the figure:

1. a hub; 11. a main body portion; 111. a large diameter section; 112. a small diameter section; 12. a flange portion; 2. a hub reduction gear case; 21. an assembly hole; 22. a groove; 23. a main housing portion; 24. an extension portion; 3. a first seal ring; 4. a brake drum; 41. a first connection portion; 42. a second connecting portion; 43. a third connecting portion; 51. an axial oil drain hole; 52. a first radial oil drain hole; 53. a second radial oil drain hole; 61. a first through hole; 62. a second through hole; 63. a third through hole; 7. a tire bolt; 8. sealing the sheet; 9. a third seal ring; 10. an oil collecting baffle; 20. and (4) an axle housing.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a wheel-side assembly of a drive axle, as shown in fig. 1 to 6, the wheel-side assembly of the drive axle includes a wheel hub 1, a wheel-side reducer casing 2 and a first sealing ring 3.

The hub 1 includes a main body 11 and a flange 12 fixed to an outer wall of the main body 11, and the flange 12 is disposed along a circumferential direction of the main body 11. Alternatively, as shown in fig. 1, the hub 1 has a central hole through which the hub 1 is fitted on an axle housing 20 of the vehicle. The end face of the first end of the hub reduction gear case 2 is provided with a fitting hole 21, the fitting hole 21 is used for being fitted with the shaft hole of the hub 1, specifically, one end of the main body portion 11 is inserted into the fitting hole 21, and the end portion of the first end abuts against the end face of the flange portion 12. And, the terminal surface of first end is equipped with and is represented annular recess 22, and this is represented annular recess 22 and communicates in pilot hole 21 and sets up around pilot hole 21. When the hub 1 and the hub reduction gear case 2 are in an assembled state, the groove 22, the outer wall of the main body portion 11 and the side face of the flange portion 12 facing the hub reduction gear case 2 form an accommodating hole, the first seal ring 3 is sleeved outside the main body portion 11 and is located in the accommodating hole, that is, the inner wall face of the first seal ring 3 contacts with the outer wall of the main body portion 11, the outer wall face of the first seal ring 3 contacts with one groove wall of the groove 22, one side wall of the first seal ring 3 contacts with the other groove wall of the groove 22, and the other side wall of the first seal ring 3 contacts with the side face of the flange portion 12 facing the hub reduction gear case 2.

When the drive axle wheel side assembly provided by the embodiment is assembled, the first seal ring 3 is firstly sleeved outside the main body part 11, the first seal ring 3 is pushed to the joint of the flange part 12 and the main body part 11, so that the other side wall of the first seal ring 3 is contacted with the flange part 12, then the first seal ring is aligned with the assembling hole 21 of the wheel side speed reducer casing 2 and the main body part 11, the wheel side speed reducer casing 2 is sleeved outside the main body part 11, the wheel side speed reducer casing 2 is pushed towards the direction close to the flange part 12 until the end part of the first end is abutted to the flange part 12, and when the end part of the first end is contacted with the flange part 12, one side wall of the groove 22 is contacted with one side wall of the first seal ring 3, so that the sharp corner of the wheel side speed reducer casing 2 cannot be contacted with the first seal ring 3, further, the situation that the wheel side speed reducer casing 2 scratches the first seal ring 3 is prevented from occurring, and the probability of early failure of the first seal ring 3 is reduced, the effect of the first sealing ring 3 for sealing the hub 1 and the hub reduction gear shell 2 is improved.

In the present embodiment, the dimension of the groove 22 in the axial direction of the reduction gear housing 2 is equal to or smaller than the dimension of the first seal ring 3 in the axial direction of the reduction gear housing 2. And when the size of the groove 22 in the axial direction of the hub reduction gear case 2 is smaller than the size of the first seal ring 3 in the axial direction of the hub reduction gear case 2, the hub 1 and the hub reduction gear case 2 can provide clamping force to the first seal ring 3, so that the first seal ring 3 has better sealing effect.

Alternatively, as shown in fig. 4, the hub reduction gear case 2 includes a main case portion 23 and an outer extension portion 24 connected to an outer wall of one end of the main case portion 23. The extension portion 24 extends in the circumferential direction of the main case portion 23 and abuts against the flange portion 12, and an end surface of one end of the extension portion 24 and an end surface of one end of the main case portion 23 are located on the same plane. The attachment hole 21 and the recess 22 are provided in the main housing portion 23, respectively.

In this embodiment, in order to improve the sealing effect between the extension portion 24 and the flange portion 12, a second sealing ring or sheet 8 may be provided between the extension portion 24 and the flange portion 12.

When being equipped with the second sealing washer between extension portion 24 and flange portion 12, extension portion 24 has the groove structure towards the surface of flange portion 12, and the groove structure encircles recess 22 and sets up, and the second sealing washer is installed in the groove structure to be used for assisting first sealing washer 3 to seal the clearance between extension portion 24 and the flange portion 12, realized the double sealing to hub 1 and wheel reduction gear shell 2, improved sealed reliability. In this case, when the second seal ring is assembled, the second seal ring may be installed in the groove structure before the first seal ring 3 is installed, or after the first seal ring 3 is installed, the second seal ring may be installed in the groove structure, and then the main body portion 11 and the hub reduction gear case 2 may be assembled such that the second seal ring is compressed between the extended portion 24 and the flange portion 12.

When the seal piece 8 is provided between the extended portion 24 and the flange portion 12, as shown in fig. 6, the seal piece 8 is pressed between the flange portion 12 and the extended portion 24 to assist the first seal ring 3 in sealing the gap between the hub 1 and the hub reduction gear case 2.

Optionally, as shown in fig. 1, the transaxle wheel hub assembly further includes a brake drum 4, the brake drum 4 contacts both the wheel hub 1 and the wheel hub reducer case 2, specifically, the brake drum 4 includes a first connecting portion 41 and a second connecting portion 42 connected to each other, the first connecting portion 41 has a first mounting hole, the second connecting portion 42 has a second mounting hole communicated with the first mounting hole, the first mounting hole has a smaller diameter than the second mounting hole, the first connecting portion 41 is sleeved outside the main body portion 11 through the first mounting hole, and the second connecting portion 42 is sleeved outside the extension portion 24 and the flange portion 12 through the second mounting hole.

Further, the brake drum 4 further includes a third connecting portion 43 connected to the second connecting portion 42, and the third connecting portion 43 has a third mounting hole communicated with the second mounting hole, and the third mounting hole is used for accommodating components such as a brake of the vehicle.

When the hub 1 is used, auxiliary lubrication such as lubricating oil is needed, the hub 1 is provided with an oil collecting cavity used for collecting the lubricating oil, the main body portion 11 is provided with an axial oil discharge hole 51 communicated with the oil collecting cavity, the flange portion 12 is provided with a first radial oil discharge hole 52 communicated with the axial oil discharge hole 51, the second connecting portion 42 is provided with a second radial oil discharge hole 53 communicated with the first radial oil discharge hole 52, and the lubricating oil in the oil collecting cavity is thrown out of the drive axle wheel edge assembly through the axial oil discharge hole 51, the first radial oil discharge hole 52 and the second radial oil discharge hole 53. Main part 11 and flange portion 12 structure as an organic whole for axial oil drain hole 51 and first radial oil drain hole 52 all set up on wheel hub 1, the radial oil drain hole 53 of second sets up on brake drum 4, when making the assembly transaxle wheel limit assembly, only need guarantee that wheel hub 1 and brake drum 4 are in suitable assembly position, so that first radial oil drain hole 52 with the radial oil drain hole 53 of second align the intercommunication can, compare in the setting mode that the oil slinging hole need pass wheel hub 1 among the prior art, wheel limit speed reducer shell 2 and brake drum 4, the assembly is more convenient for at the transaxle wheel limit, the probability of misloading has been reduced, the reliability of the oil slinging of transaxle wheel limit assembly has still been improved. Illustratively, an oil collecting baffle 10 is connected to an end of the hub 1, and the oil collecting cavity is formed between the oil collecting baffle 10 and the end of the hub 1.

In this embodiment, in order to further facilitate the alignment of the first radial oil drain hole 53 with the second radial oil drain hole 52, as shown in fig. 1, the diameter of the second radial oil drain hole 53 is larger than that of the first radial oil drain hole 52.

Optionally, the end surface of the flange portion 12 has a first groove, the inner wall of the second connecting portion 42 has a second groove opposite to the first groove, and the first groove and the second groove form a first accommodating hole, as shown in fig. 6, the transaxle wheel rim assembly further includes a third sealing ring 9, and the third sealing ring 9 is located in the first accommodating hole and is used for sealing a gap between the flange portion 12 and the second connecting portion 42 to prevent lubricating oil from entering between the flange portion 12 and the second connecting portion 42.

As shown in fig. 3, 4 and 5, the flange portion 12 is provided with a first through hole 61, the extension portion 24 is provided with a second through hole 62 corresponding to the first through hole 61, and the first connection portion 41 is provided with a third through hole 63 corresponding to the second through hole 62. The drive axle hub assembly further comprises a tire bolt 7 (as shown in fig. 1), wherein the tire bolt 7 is inserted into the first through hole 61, the second through hole 62 and the third through hole 63 to connect the hub 1, the hub reduction gear case 2 and the brake drum 4. Through the cooperation of the third through hole 63 of the first connecting portion 41 and the first through hole 61 of the flange portion 12, compared with a connecting mode of arranging a flange on the brake drum 4 in the prior art, the overall weight of the brake drum 4 and the space occupied by the brake drum 4 can be reduced.

Alternatively, as shown in fig. 3, the body portion 11 includes a large diameter section 111 connected to the flange portion 12 and a small diameter section 112 connected to the large diameter section 111, the radial dimension of the large diameter section 111 is larger than that of the small diameter section 112, and the outer wall of the large diameter section 111 is in contact with the hole wall of the fitting hole 21.

The first seal ring 3, the second seal ring, the third seal ring 10 and the sealing sheet 9 in this embodiment are made of rubber, silica gel or the like, so as to have high elasticity.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A drive axle wheel-rim assembly, comprising:

the hub (1) comprises a main body part (11) and a flange part (12) fixed on the outer wall of the main body part (11);

the wheel reduction gearbox shell (2), a first end of the wheel reduction gearbox shell (2) is provided with an assembling hole (21), one end of the main body part (11) is inserted into the assembling hole (21), the end part of the first end abuts against the flange part (12), an annular groove (22) is formed in the end face of the first end, and the groove (22), the main body part (11) and the flange part (12) form accommodating holes;

the first sealing ring (3) is sleeved outside the main body part (11) and is positioned in the accommodating hole.

2. The transaxle hub assembly of claim 1 wherein the hub reduction gear case (2) comprises a main housing portion (23) and an extension portion (24) connected to an outer wall of one end of the main housing portion (23), the fitting hole (21) and the recess (22) are respectively disposed on the main housing portion (23), and the extension portion (24) abuts against the flange portion (12).

3. The axle wheel rim assembly according to claim 2, characterized in that the surface of the extension portion (24) facing the flange portion (12) has a groove structure, the axle wheel rim assembly further comprising a second sealing ring, the second sealing ring being mounted in the groove structure.

4. The axle wheel-rim assembly according to claim 2, further comprising a brake drum (4), wherein the brake drum (4) comprises a first connecting portion (41) and a second connecting portion (42) connected with each other, the first connecting portion (41) is sleeved outside the main body portion (11), and the second connecting portion (42) is sleeved outside the extension portion (24) and the flange portion (12).

5. The axle wheel hub assembly according to claim 4, wherein the wheel hub (1) has an oil collecting chamber, the main body portion (11) is provided with an axial oil drain hole (51) communicated with the oil collecting chamber, the flange portion (12) is provided with a first radial oil drain hole (52) communicated with the axial oil drain hole (51), and the second connecting portion (42) is provided with a second radial oil drain hole (53) communicated with the first radial oil drain hole (52).

6. The transaxle wheel rim assembly of claim 5 wherein the second radial oil drain hole (53) has a larger bore diameter than the first radial oil drain hole (52).

7. The transaxle wheel hub assembly of claim 4 wherein the end surface of the flange portion (12) has a first groove, the inner wall of the second connecting portion (42) has a second groove opposite the first groove, the first and second grooves forming a first receiving hole, the transaxle wheel hub assembly further comprising a third seal ring, the third seal ring being positioned in the first receiving hole.

8. The drive axle wheel rim assembly according to claim 4, characterized in that the flange portion (12) is provided with a first through hole (61), the outer extension portion (24) is provided with a second through hole (62) corresponding to the first through hole (61), the first connecting portion (41) is provided with a third through hole (63) corresponding to the second through hole (62), and the drive axle wheel rim assembly further comprises a tire bolt (7), wherein the tire bolt (7) is inserted into the first through hole (61), the second through hole (62) and the third through hole (63).

9. The axle wheel-rim assembly according to claim 2, further comprising a sealing plate, said sealing plate being arranged in compression between said flange portion (12) and said extension portion (24).

10. The transaxle wheel rim assembly of claim 1 wherein the main body portion (11) includes a large diameter section (111) connected to the flange portion (12) and a small diameter section (112) connected to the large diameter section (111), the large diameter section (111) has a radial dimension larger than that of the small diameter section (112), and an outer wall of the large diameter section (111) contacts a wall of the fitting hole (21).