CN215172235U

CN215172235U - Wheel hub

Info

Publication number: CN215172235U
Application number: CN202121005428.7U
Authority: CN
Inventors: 李小龙; 石维; 孟凡行; 郑建辉
Original assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute; Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Current assignee: Special Vehicle Technology Center of Hubei Aerospace Technology Research Institute; Hubei Sanjiang Space Wanshan Special Vehicle Co Ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-14
Anticipated expiration: 2031-05-12

Abstract

The utility model discloses a wheel hub relates to wheel hub sealing technical field, has solved in the wheel hub oil seal and has been easily broken and lead to the problem that gear oil revealed by the pressure. The hub comprises a hub body, and a central hole is formed in the hub body; the input shaft is arranged in a central hole of the hub body; the self-sealing bearing is arranged in the central hole, the inner ring of the self-sealing bearing is connected with the input shaft, the outer ring of the self-sealing bearing is connected with the inner side wall of the hub body, and an oil containing cavity is formed between the self-sealing bearing and the bottom of the central hole; wherein, be equipped with the sealing washer that is used for preventing the oil leak of oil holding chamber between the inner circle of input shaft and self sealss bearing. The utility model discloses a self sealss bearing that sets up, when the input shaft rotates, the sealing in oil holding chamber not only can be realized to self sealss bearing, can also guarantee the steady operation of input shaft to sealing washer through setting up can also further strengthen sealed effect, with the stability of assurance to oil holding chamber is sealed.

Description

Wheel hub

Technical Field

The utility model relates to a wheel hub seals technical field, particularly, indicates a wheel hub.

Background

The wheel is applied to the wheel position of the automobile chassis for bearing and providing accurate guide for the rotation of the wheel, bears axial load and radial load, and is an important component of automobile load and rotation. In particular to a hub assembly with a hub reduction gear, which transfers power by an input shaft, the input shaft is simultaneously contacted with the outside and the inside of a hub, the middle part needs to be dynamically sealed, and the gear oil leakage of the input shaft in the rotating process is prevented.

At present, the sealing of a hub input shaft is mainly guaranteed through installing an oil seal, an outer ring of the oil seal is fixed on a hub body, and an inner ring of the oil seal is in contact with the input shaft, so that gear oil cannot cross over an oil seal lip. However, this solution also has associated drawbacks: firstly, the pressure resistance of the oil seal is lower. The hub can generate heat in the rotating process, the pressure of internal gas can be increased after the internal gas is heated, and when the heat dissipation of the hub is poor, the oil seal is easily crushed to leak oil; and secondly, the reliability is low, the gear oil in the hub is mainly sealed by an oil seal, no redundant design is provided, and once the gear oil fails, no secondary sealing is provided, so that oil leakage is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at improving the not enough of prior art, provide a wheel hub to solve in the wheel hub oil seal and be easily crushed and lead to the problem that gear oil revealed.

The utility model provides a technical scheme that this technical problem adopted is:

a wheel hub, comprising:

the hub comprises a hub body, wherein a central hole is formed in the hub body;

an input shaft mounted within a central bore of the hub body;

the self-sealing bearing is arranged in the central hole, an inner ring of the self-sealing bearing is connected with the input shaft, an outer ring of the self-sealing bearing is connected with the inner side wall of the hub body, and an oil containing cavity is formed between the self-sealing bearing and the bottom of the central hole;

and a sealing ring for preventing the oil containing cavity from leaking is arranged between the input shaft and the inner ring of the self-sealing bearing.

Optionally, an annular groove is formed in the side wall of the input shaft, the annular groove is located at the inner ring position of the self-sealing bearing, and the sealing ring is arranged in the annular groove.

Optionally, a first sinking groove is formed in the inner side wall of the hub body, and a boss structure is arranged on the input shaft;

the outer ring of the self-sealing bearing is arranged in the first heavy groove, and the inner ring of the self-sealing bearing is arranged on the boss structure.

Optionally, the self-sealing bearing and the inner side wall of the hub body, the first sunken groove and the matching surface of the boss structure are smooth surfaces.

Optionally, wheel hub still includes the sealing glue layer, the sealing glue layer sets up self sealss bearing's outer lane with between the inside wall of wheel hub body for form static seal.

Optionally, the material of the sealant layer is silicone sealant.

Optionally, the wheel hub further comprises an oil seal, an outer ring of the oil seal is connected with the inner side wall of the wheel hub body, a lip is arranged on an inner ring of the oil seal, the lip is sleeved on the input shaft, and the self-sealing bearing is located between the oil seal and the bottom of the central hole.

Optionally, the lip is sleeved on the input shaft and extends along the axial direction of the input shaft.

Optionally, an oil seal cavity is formed between the oil seal and the self-sealing bearing.

Optionally, a second sinking groove is formed in the inner side wall of the hub body, and the oil seal is installed in the second sinking groove.

Compared with the prior art, the utility model provides a wheel hub has beneficial effect is:

the utility model discloses a self sealss bearing that sets up on the input shaft and the centre bore bottom on the wheel hub body between form oily holding chamber. In the process of driving the hub body to rotate by the input shaft, the self-sealing bearing can not only realize the sealing of the oil containing cavity, but also support the oil containing cavity between the hub body and the input shaft, so that the stable operation of the input shaft is ensured, and the oil seal is prevented from being crushed. And the sealing ring arranged on the input shaft can also play a role in strengthening the sealing of the oil containing cavity, so that the gear oil in the oil containing cavity is prevented from leaking outwards.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a wheel hub of the present invention;

fig. 2 is a schematic structural view of the hub body of the present invention;

fig. 3 is a schematic structural diagram of the input shaft of the present invention.

In the figure:

1-hub body, 101-center hole, 1011-oil containing cavity, 1012-first sinking groove, 1013-second sinking groove, 1014-tooth groove, 2-self-sealing bearing, 3-input shaft, 301-annular groove, 3011-sealing ring, 302-boss structure, 303-gear, 4-oil seal, 401-lip, 402-oil seal cavity and 5-sealant layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are merely exemplary of the invention and are not intended to be exhaustive. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example (b):

the utility model provides a pair of wheel hub, as shown in fig. 1 and 2, including wheel hub body 1, input shaft 3, self sealss bearing 2 and oil blanket 4. One end of the input shaft 3 is connected with a gear 303, a central hole 101 is arranged on the hub body 1, and a tooth groove 1014 is arranged on the side wall of the bottom of the central hole 101. One end of the input shaft 3 connected with the gear 303 is positioned in the central hole 101, the gear 303 is meshed with the tooth groove 1014, and the input shaft 3 drives the hub body 1 to rotate through the gear 303. Of course, the mating of gear 303 and tooth slot 1014 involves a keyed connection, which is well established in the art and will not be described further herein.

Wherein, the inner circle of self-sealing bearing 2 is established on input shaft 3 to be located the middle part region of centre bore 101, the outer lane butt of self-sealing bearing 2 is on the inside wall of wheel hub body 1. The space between the self-sealing bearing 2 and the bottom of the central bore 101 forms an oil receiving chamber 1011. it will be appreciated that the oil receiving chamber 1011 will be filled with gear oil for lubrication of the meshing of the gear 303 and the tooth space 1014. It is foreseeable that, after the self-sealing bearing 2 is used, the self-sealing bearing 2 itself determines that it has a sealing function, and it can effectively support the input shaft 3 and also can ensure the smooth operation of the input shaft 3.

As shown in fig. 2 and 3, the inner sidewall of the hub body 1 is provided with a first sinking groove 1012 and a second sinking groove 1013, and the input shaft 3 is further provided with a boss structure 302. When the self-sealing bearing 2 is sleeved on the input shaft 3, the inner ring of the self-sealing bearing 2 far away from the bottom of the central hole 101 is abutted against the boss structure 302, and the outer ring side wall of the self-sealing bearing 2 near the bottom of the central hole 101 is abutted against the first sunken groove 1012. Of course, to ensure the sealing effect, the mating surfaces of the self-sealing bearing 2 and the inner sidewall of the hub body 1, the first sunken groove 1012 and the boss structure 302 are smooth surfaces.

It is worth mentioning that in reality it is not guaranteed that the faces are completely smooth, so that a complete sealing is achieved by the face-to-face cooperation. Therefore, a sealant layer 5 is further disposed between the self-sealing bearing 2 and the sidewall of the central hole 101 to form a static seal, thereby enhancing the sealing effect. Of course, since the input shaft 3 drives the hub body 1 to rotate at a fast speed, a high-temperature and high-pressure environment is formed, and therefore, the sealant layer 5 includes, but is not limited to, silicone sealant, and sealant formed by polymerizing heat-resistant resin and various heat-resistant materials.

As shown in fig. 1 and 3, a ring-shaped groove 301 is further provided at the contact position of the input shaft 3 and the inner ring of the self-sealing bearing 2, and a seal ring 3011 is provided in the ring-shaped groove 301. It can be understood that the inner ring of the self-sealing bearing 2 is sleeved on the input shaft 3, and the inner ring of the self-sealing bearing 2 and the input shaft 3 rotate together at a high speed, so that the sealing effect is enhanced by adding a dynamic seal manner such as the seal ring 3011.

It should be noted that when the input shaft 3 drives the hub body 1 to rotate, the force applied to the hub body 1 includes not only the rotational force of the input shaft 3 but also the weight of the vehicle itself in the radial direction and the axial load from the input shaft 3 controlling the steering of the hub body 1. Correspondingly, the input shaft 3 also can receive radial and horizontal power, so set up self sealss bearing 2 on the input shaft 3 will receive radial and horizontal power, consequently, through the first heavy groove 1012 and the boss structure 302 that set up, can effectually avoid self sealss bearing 2 to change and influence the emergence of the sealed condition in atress back position.

It should be noted that, in order to achieve better sealing effect, the number of the annular grooves 301 may be multiple, and correspondingly, the sealing rings 3011 should be disposed in all the annular grooves 301. It should be noted that, even if the static seal in which the sealant layer 5 is added is used for the outer ring of the self-sealing bearing 2 and the side wall of the central hole 101, the seal enhancement effect may be achieved by providing a groove in the inner side wall of the hub body 1 or by providing a groove in the outer ring of the self-sealing bearing 2 and by providing a dynamic seal in which the seal ring 3011 is provided in the groove. Of course, the number of the grooves can be set according to the actual situation, and is not only one.

Finally, as shown in fig. 1, the self-sealing bearing 2 does not completely guarantee that the gear oil in the oil receiving cavity 1011 will not leak during the rotation of the hub body 1 driven by the input shaft 3. When the oil pressure reaches a certain level, a very small part of the gear oil still leaks through the self-sealing bearing 2. Therefore, an oil seal 4 is also arranged at the head part of the central hole 101, and the oil seal 4 and the self-sealing bearing 2 form a redundant sealing structure to enhance the sealing effect. The outer ring of the oil seal 4 abuts against the inner side wall of the hub body 1, and the outer ring side wall of the oil seal 4 abuts against the second sinking groove 1013 arranged on the inner side wall of the hub body 1. The lip 401 on the inner ring of the oil seal 4 is sleeved on the input shaft 3 and extends towards two sides to form dynamic seal. Of course, the sealing glue layer 5 can be arranged between the oil seal 4 and the inner side wall of the hub body 1 to realize the sealing enhancement effect.

As shown in fig. 1, an oil seal cavity 402 is formed between the oil seal 4 and the self-sealing bearing 2, and the gear oil leaked from the self-sealing bearing 2 due to high temperature and high pressure accumulates in the oil seal cavity 402 without leaking.

It is worth explaining that the self-sealing bearing 2 is matched with the oil seal 4 to form a redundant sealing structure, and meanwhile, the influence of partial air pressure fluctuation on the oil seal 4 is counteracted, and the self-sealing bearing 2 enables the stable operation of the input shaft 3 to ensure that the rotating shaft jumps within the required range of the lip 401 of the oil seal 4, so that the reliability of the oil seal 4 is improved, and the input shaft 3 is prevented from jumping too much to damage the oil seal 4.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A hub, comprising:

the hub comprises a hub body (1), wherein a central hole (101) is formed in the hub body (1);

an input shaft (3), the input shaft (3) being mounted within a central bore (101) of the hub body (1);

the self-sealing bearing (2) is arranged in the central hole (101), the inner ring of the self-sealing bearing (2) is connected with the input shaft (3), the outer ring of the self-sealing bearing (2) is connected with the inner side wall of the hub body (1), and an oil containing cavity (1011) is formed between the self-sealing bearing (2) and the bottom of the central hole (101);

and a sealing ring (3011) for preventing the oil accommodating cavity (1011) from leaking is arranged between the input shaft (3) and the inner ring of the self-sealing bearing (2).

2. Hub according to claim 1, wherein an annular groove (301) is cut in the side wall of the input shaft (3), the annular groove (301) is located at the inner ring position of the self-sealing bearing (2), and the sealing ring (3011) is arranged in the annular groove (301).

3. Hub according to claim 2, wherein the inner side wall of the hub body (1) is provided with a first undercut (1012), and the input shaft (3) is provided with a boss structure (302);

the outer ring of the self-sealing bearing (2) is arranged in the first heavy groove (1012), and the inner ring of the self-sealing bearing (2) is arranged on the boss structure (302).

4. Hub according to claim 3, wherein the mating surfaces of the self-sealing bearing (2) with the inner side wall of the hub body (1), the first countersunk groove (1012) and the boss structure (302) are smooth surfaces.

5. Hub according to claim 1, further comprising a sealant layer (5), said sealant layer (5) being arranged between the outer ring of said self-sealing bearing (2) and the inner sidewall of said hub body (1) for forming a static seal.

6. A hub according to claim 5, wherein the sealant layer (5) is made of silicone sealant.

7. The hub according to any one of claims 1 to 6, further comprising an oil seal (4), wherein an outer ring of the oil seal (4) is connected to an inner side wall of the hub body (1), an inner ring of the oil seal (4) is provided with a lip (401), the lip (401) is sleeved on the input shaft (3), and the self-sealing bearing (2) is located between the oil seal (4) and the bottom of the central hole (101).

8. Hub according to claim 7, wherein the lip (401) is fitted over the input shaft (3) and extends in the axial direction of the input shaft (3).

9. Hub according to claim 8, wherein an oil seal cavity (402) is formed between the oil seal (4) and the self-sealing bearing (2).

10. Hub according to claim 9, wherein the inner sidewall of the hub body (1) is provided with a second sunken groove (1013), and the oil seal (4) is mounted in the second sunken groove (1013).