CN217401697U - Flange sealing structure, rear axle and engineering machinery - Google Patents

Abstract

The utility model discloses a flange sealing structure, a rear axle and engineering machinery, which comprises a rotating shaft, a flange, a sealing assembly and a sealing assembly; the flange is arranged at the end part of the rotating shaft; the axial fixing part is used for fixing the flange on the rotating shaft so that the flange rotates along with the rotating shaft; the sealing assembly is arranged in the inner hole of the end cover and is in contact with the circumferential surface of the flange; a plurality of spacing parts are installed together in the end cover hole stack for to seal assembly carries out axial spacing, realizes seal assembly and the flange periphery contact of different positions through increasing and decreasing spacing parts. The utility model discloses a technical scheme has solved the problem that axle type rotating seal spare wearing and tearing are fast, life is short, has reduced the use cost and the maintenance degree of difficulty of this type of part.

Description

Flange sealing structure, rear axle and engineering machinery

Technical Field

The utility model belongs to flange seal structure field, concretely relates to input flange of rear axle and seal structure of rotation axis.

Background

Large-sized vehicle transportation equipment requires high working efficiency and long operation time. The rear axle is the tail end of the power transmission system of the transport vehicle and plays a role in reducing speed and increasing torque. Oil leakage at the input flange or the output flange of a mechanical transmission transport vehicle and a power transmission system is one of the most common faults.

At present, the method for solving the problem of oil leakage in the market is basically to directly replace a sealing piece and a shaft type rotating piece which is worn in cooperation with the sealing piece. And the axle type part is with high costs, the maintenance degree of difficulty is big, the utility model discloses a solve this type of problem and provide an input flange seal structure of rear axle.

SUMMERY OF THE UTILITY MODEL

According to prior art's is not enough, the utility model provides a flange seal structure makes the flange can repetitious usage under the local wear condition through the mode at the downthehole increase and decrease space ring of end cover, and the linear life who improves the part.

The utility model discloses realize according to following technical scheme:

the utility model provides a flange sealing structure in a first aspect, which comprises a rotating shaft, a flange, a sealing assembly and a sealing assembly; the flange is arranged at the end part of the rotating shaft; the axial fixing part is used for fixing the flange on the rotating shaft so that the flange rotates along with the rotating shaft; the sealing assembly is arranged in the inner hole of the end cover and is in contact with the circumferential surface of the flange; a plurality of spacing parts are installed together in the end cover hole stack for to seal assembly carries out axial spacing, realizes seal assembly and the flange periphery contact of different positions through increasing and decreasing spacing parts.

In some embodiments, the seal assembly employs a skeletal oil seal, and the skeletal oil seal lip contacts the circumferential surface of the flange after the skeletal oil seal is installed in the inner bore of the end cap.

In some embodiments, the rotational speed and torque are transmitted between the rotating shaft and the flange by a spline connection.

In some embodiments, the axial securing member is comprised of a pressure plate and a bolt; the pressing plate is arranged at the inner step of the flange, and the bolt penetrates through the pressing plate and is fixed on the axial surface of the rotating shaft.

In some embodiments, a dust guard is provided at the flange to end cap connection to prevent dust from entering the seal assembly.

In some embodiments, the dust guard is a dust shield welded to the circumferential surface of the flange.

In some embodiments, a bearing is mounted in the end cap, an outer race of the bearing is secured within the end cap, and an inner race of the bearing is secured to the rotating shaft.

In some embodiments, the limiting part is a spacer ring, and a plurality of spacer rings are sequentially sleeved on the flange.

The utility model discloses the second aspect provides a rear axle installs foretell flange seal structure.

The third aspect of the utility model provides an engineering machine, which is provided with the flange sealing structure; alternatively, the rear axle described above is installed.

Compared with the prior art, the utility model discloses beneficial effect:

the utility model discloses a technical scheme has solved the problem that axle type rotary seal spare wearing and tearing are fast, life is short, has reduced the use cost and the maintenance degree of difficulty of this type of part, provides a new solution for similar dynamic seal structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, 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 without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

fig. 1 is a sectional view of the flange sealing structure of the present invention;

fig. 2 is a partially enlarged view of fig. 1.

The attached drawings are as follows: 1-a bolt; 2-pressing a plate; 3-a rotation axis; 4-a flange; 5-a dust cover; 6-space ring; 7-framework oil seal; 8-end cap; 9-bearing.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solution in the embodiments, and the following embodiments are used to illustrate the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on 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.

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, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, a flange sealing structure includes a rotating shaft 3, a flange 4, an axial fixing member, a sealing assembly and a plurality of limiting members; the flange 4 is arranged at the end part of the rotating shaft 3; axial fixing means for fixing the flange 4 to the rotary shaft 3 such that the flange 4 rotates along with the rotary shaft 3; the sealing component is arranged in an inner hole of the end cover 8 and is contacted with the circumferential surface of the flange 4; a plurality of spacing parts stack and install together in 8 holes of end cover for carry out axial spacing to seal assembly, realize seal assembly and the contact of the 4 periphery of flange of different positions through the spacing part of increase and decrease.

Further scheme: the sealing component adopts a framework oil seal 7, and after the framework oil seal 7 is arranged in an inner hole of the end cover 8, a lip of the framework oil seal is contacted with the circumferential surface of the flange 4. Spacing part is space ring 6, and a plurality of space rings 6 suit in proper order is on flange 4. The flange 4 and the end cover 8 are sealed through the framework oil seal 7, when the flange is in operation, the lip of the framework oil seal can continuously abrade the circumferential surface of the flange 4, and when the circumferential surface of the flange 4 is abraded too much, oil leakage can occur at the circumferential surface. At this time, the spacer 6 is removed, and the framework oil seal 7 is mounted in place, and the lip of the framework oil seal contacts different parts of the circumferential surface of the flange 4. If the circumferential surface of the flange 4 leaks oil again, a spacer ring 6 is continuously removed and can be continuously used on the premise of not replacing the flange 4. Therefore, when the circumferential surface of the flange 4 is worn to reach the service life, the service life of related parts can be greatly prolonged by circularly removing the spacing ring 6.

Further scheme: the rotational speed and torque are transmitted between the rotating shaft 3 and the flange 4 by a spline connection.

Further scheme: the axial fixing component consists of a pressure plate 2 and a bolt 1; the pressure plate 2 is arranged at the inner step of the flange 4, and the bolt 1 passes through the pressure plate 2 and is fixed on the axial surface of the rotating shaft 3.

Further scheme: a dust-proof component for preventing dust from entering the sealing assembly is arranged at the joint of the flange 4 and the end cover 8.

The preferable scheme is as follows: the dust-proof member is a dust-proof cover 5 welded to the circumferential surface of the flange 4.

Further scheme: a bearing 9 is mounted in the end cover 8, an outer ring of the bearing 9 is fixed in the end cover 8, and an inner ring of the bearing 9 is fixed to the rotary shaft 3.

The specific installation process is as follows: with continued reference to fig. 1 and 2, the flange 4 is splined to the rotating shaft 3 to transmit rotational speed and torque. The pressing plate 2 axially compresses the binding surfaces of the flange and the bearing 9 through the bolt 1. The flange 4 will rotate along with the rotating shaft 3. The framework oil seal 7 is arranged in an inner hole of the end cover 8, and a plurality of space rings 6 are arranged in the inner hole of the end cover 8 before the framework oil seal is arranged. The outer ring of the bearing 9 is fixed, and the inner ring is arranged on the rotating shaft 3 and rotates along with the shaft. When the flange 4 rotates, the framework oil seal 7 is fixed, and the lip of the framework oil seal can continuously grind the circumferential surface of the flange 4. When the circumferential surface of the flange 4 is worn too much, a gap occurs there, resulting in oil leakage. At the moment, the end cover 8 and the framework oil seal 7 are disassembled, one space ring 6 is disassembled, and then the framework oil seal 7 and the end cover 8 are installed in place. And then the lip of the framework oil seal contacts different parts of the circumferential surface of the flange, so that oil leakage can not occur. The service life of the flange 4 can be greatly prolonged by disassembling and reducing the space ring 6 for many times.

The utility model also discloses a rear axle installs foretell flange seal structure.

The utility model also discloses an engineering machine, which is provided with the flange sealing structure; alternatively, the rear axle described above is installed.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments, not others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the present invention.

Claims (10)

1. A flange seal structure, comprising:

a rotating shaft;

a flange provided at an end of the rotating shaft;

an axial fixing member for fixing the flange to the rotary shaft such that the flange rotates along with the rotary shaft;

a seal assembly mounted in the end cap bore and in contact with the circumferential face of the flange;

and the plurality of limiting parts are stacked together and installed in the inner hole of the end cover and used for axially limiting the sealing assembly, and the sealing assembly is contacted with the circumferential surfaces of the flanges at different positions by increasing or decreasing the limiting parts.

2. A flange seal according to claim 1, wherein:

the sealing assembly adopts a framework oil seal, and after the framework oil seal is arranged in an inner hole of the end cover, a lip of the framework oil seal is in contact with the circumferential surface of the flange.

3. A flange seal according to claim 1, wherein:

the rotating shaft and the flange are connected through a spline to transmit rotating speed and torque.

4. A flange seal according to claim 1, wherein:

the axial fixing part consists of a pressure plate and a bolt;

the pressing plate is arranged at the inner step of the flange, and the bolt penetrates through the pressing plate and is fixed on the axial surface of the rotating shaft.

5. A flange seal structure according to claim 1, wherein:

and a dustproof part for preventing dust from entering the sealing assembly is arranged at the joint of the flange and the end cover.

6. A flange seal according to claim 5, wherein:

the dustproof component is a dustproof cover and is welded on the circumferential surface of the flange.

7. A flange seal structure according to claim 1, wherein:

and a bearing is arranged in the end cover, the outer ring of the bearing is fixed in the end cover, and the inner ring of the bearing is fixed on the rotating shaft.

8. A flange seal structure according to claim 1, wherein:

the limiting part is a space ring, and a plurality of space rings are sequentially sleeved on the flange.

9. A rear axle, characterized by:

a flange seal structure according to any one of claims 1 to 8 is mounted.

10. A construction machine, characterized in that:

mounting the flange seal structure of any one of claims 1 to 8; alternatively, a rear axle according to claim 9 is installed.

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