CN219821608U - Thrust wheel seal structure and wheel hub shroud - Google Patents

Abstract

The utility model belongs to the technical field of crawler traveling mechanisms, and particularly relates to a supporting wheel sealing structure and a hub cover, wherein a sealing section for accommodating the hub cover is arranged on a supporting wheel hub, a limiting step is arranged at the inner end of the sealing section and is connected, an annular groove is arranged at the outer end of the sealing section, a snap spring is clamped in the annular groove to drive the axial end face of the hub cover to press against the limiting step and prevent the hub cover from axially outwards displacing along the hub, a rubber layer is arranged between the outer end face of the limiting step, the inner peripheral wall of the sealing section and the hub cover in a lining manner, and the rubber layer is attached to the hub cover. The wheel hub shroud is easy to produce and convenient to install and operate, and when the wheel hub shroud is matched with the thrust wheel, the axial direction and the radial direction of the wheel hub end part of the thrust wheel can be simultaneously sealed, and the sealing effect can be obviously improved.

Description

Thrust wheel seal structure and wheel hub shroud

Technical Field

The utility model belongs to the technical field of crawler travelling mechanisms, and particularly relates to a hub cover cap and an installation structure thereof.

Background

The machinery using the crawler running mechanism usually has a bad working environment and is often worn and corroded by sludge and sand. The bearing is arranged in the hub to be rotationally connected with the wheel shaft, and the end cover is arranged on the outer side of the hub of the bearing wheel, so that the end cover can prevent lubricating oil in the hub from leaking out, and prevent external muddy water or sand from entering the hub to damage the wheel train. Obviously, the sealing performance of the end cover directly influences the service life of the thrust wheel and the wheel shaft thereof.

The prior art discloses a crawler-type engineering machinery towing sprocket as in chinese patent CN216002824U, wherein an end cover 3 is fixed on a towing wheel base 7 through a retainer ring 1 or a bolt, an O-ring 4 is arranged between the end cover 3 and the towing wheel base 7, and a screw plug 2 is arranged in the middle of the end cover 3, so as to check the oil state inside the towing sprocket. In this scheme, the screw plug 2 in the middle of the end cover 3 is not provided with a sealing element, so that the inside and outside of the end cover 3 cannot be reliably isolated, in addition, the contact between the O-shaped ring 4 and the outer peripheral surface of the end cover 3 can be known by combining the drawing, in the practical application, the end cover 3 and the tug matrix 7 form a linear sealing fit with the peripheral surface of the ring end cover 3, however, the end cover is easy to deflect due to impact or extrusion of a hard object during operation, and the O-shaped ring 4 is extruded, so that the sealing is invalid.

Disclosure of Invention

The utility model aims to provide a thrust wheel sealing structure and a hub cover cap which are simple in structure and good in sealing performance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a thrust wheel seal structure, is equipped with the sealed section that is used for holding the wheel hub shroud on the thrust wheel hub, and the inner of sealed section is equipped with spacing step and meets, the outer end is equipped with the annular, and the jump ring card is arranged in the annular and is driven the axial terminal surface of wheel hub shroud and support and press on spacing step and prevent wheel hub shroud along wheel hub axial outwards displacement, and spacing step outer terminal surface, the lining has the rubber layer between the inner perisporium of sealed section and the wheel hub shroud, the rubber layer attach to be located on the wheel hub shroud.

The utility model provides a wheel hub shroud, wheel hub shroud includes wholly is discoid apron, and the plate body edge cladding of apron has the rubber layer, the rubber layer cladding apron flange and interior face in succession.

The utility model provides a wheel hub shroud, wheel hub shroud includes wholly is discoid apron, the plate body edge of apron is equipped with the cover circle of axial extension, the circle mouth department cladding of cover circle has the rubber layer, the rubber layer continuous cladding cover circle mouth terminal surface and outer lane face.

Compared with the prior art, the utility model has the following technical effects: the wheel hub shroud is rational in infrastructure, easily production and installation simple operation, and when wheel hub shroud and thrust wheel joined in marriage, can seal the axial and the radial of thrust wheel hub tip simultaneously, sealed effect can be obtained showing and promote.

Drawings

The contents expressed in the drawings of the present specification and the marks in the drawings are briefly described as follows:

FIG. 1 is a schematic cross-sectional view of a first embodiment;

FIG. 2 is a schematic cross-sectional view of a second embodiment;

FIG. 3 is a schematic cross-sectional view of a third embodiment;

FIG. 4 is a schematic cross-sectional view of a fourth embodiment;

FIG. 5 is a schematic cross-sectional view of embodiment five;

FIG. 6 is a schematic cross-sectional view of a sixth embodiment;

FIG. 7 is an enlarged schematic view of portion A of FIG. 6;

FIG. 8 is a schematic cross-sectional view of a seventh embodiment;

FIG. 9 is a schematic cross-sectional view of an eighth embodiment;

FIG. 10 is a schematic partial cross-sectional view of the thrust wheel without the hub end cover installed;

FIG. 11 is a schematic partial cross-sectional view of a thrust wheel with a hub end cap mounted thereto;

FIG. 12 is an enlarged schematic view of portion B of FIG. 10;

fig. 13 is an enlarged schematic view of a portion C in fig. 11.

Detailed Description

The following describes the embodiments of the present utility model in further detail by way of examples with reference to the accompanying drawings.

Example 1

A hub cover comprises a cover plate 11, wherein a central plate body of the cover plate 11 which is integrally disc-shaped protrudes outwards to form an outer protruding part 111, and the outer protruding part 111 and an annular plate body at the periphery thereof form a cover body framework of the hub cover 10. The outer flange 111 encloses and closes to form a cavity 112, and under the in-service condition, this cavity 112 can dodge the mounting screw of thrust wheel shaft tip, and the axial protruding dimension, the radial dimension of outer flange 111 can be adjusted according to the demand, when not dodging the demand, also can not set up outer flange 111, and the wheel hub shroud 10 is whole to be circular flat. In this embodiment, the cover body skeleton of the hubcap 10 is formed by processing a thin-walled metal plate, the outer flange 111 and the cover plate 11 are integrally formed, and in other embodiments, the hubcap 10 may be formed by processing a polymer material.

As shown in fig. 1, a rubber layer 20 is coated on the edge of the plate body of the cover plate 11, and the rubber layer 20 continuously coats the peripheral plate edge and the inner plate surface of the cover plate 11. The cladding surface of the rubber layer 20 is large, and can be reliably adhered to the cover plate 11 and connected with the cover plate 11 into a whole, so that when the bearing support is used, the hub cover 10 is directly arranged on the hub end face of the bearing support wheel, the installation of the hub end cover 10 can be completed, the rubber gasket is not required to be positioned to ensure the lining position, poor sealing caused by offset of the rubber lining position and other reasons can be effectively avoided, and the sealing effect of the hub end part of the bearing support wheel is ensured.

In the use state, the circumferential plate edge of the cover body of the wheel hub cover 10 can be in sealing fit with the inner wall surface of the wheel hub of the thrust wheel, and the inner end surface can be in sealing fit with the corresponding step surface arranged on the wheel hub of the thrust wheel. The rubber layer 20 is continuously arranged on two adjacent surfaces of the hub cover 10 in an upward direction, so that the sealing area between the hub cover 10 and the thrust wheel hub is enlarged, and the sealing performance of the thrust wheel hub can be improved.

Example two

The difference between this embodiment and the first embodiment is that the rubber layer 20 continuously covers the outer plate surface, the plate edge and the inner plate surface of the cover plate 11, and as shown in fig. 2, the rubber layer 20 is continuously disposed on the circumferential surface of the hubcap 10 and the inner and outer end surfaces thereof. In this way, in the mounted state, the sealing area between the hub cap 10 and the thrust wheel hub is further enlarged, and the corner portion at the junction of the outer plate surface and the plate edge is increased, so that the sealing performance of the hub end cap 10 in the deflected posture can be further improved.

In another embodiment, a through hole 113 for connection with the oil cup 30 may be opened in the outer flange 111, and rubber provided at the outer edge of the through hole 113 constitutes the oil cup rubber layer 21. The oil cup rubber layer 21 is arranged between the cover plate 11 and the oil cup 30 in a lining manner, so that the sealing performance of the joint of the cover plate 11 and the oil cup 30 can be ensured, and leakage of lubricating oil or entry of muddy water into the thrust wheel hub from the joint of the cover plate and the oil cup can be avoided.

The oil cup rubber layer 21 may be arranged continuously or at intervals from the rubber layer 20. As shown in FIG. 5, in the embodiment in which the oil cup rubber layer 21 and the rubber layer 20 are arranged at intervals, the rubber layer 20 on the outer surface of the cover plate 11 is in a ring-shaped layer shape as a whole, the inner diameter of the outer end of the rubber layer 20 is larger than the outer diameter of the oil cup rubber layer 21, and the two rubber layers are arranged at intervals, so that the rubber material can be saved. In other embodiments, when the rubber layer 20 is not applied to the outer surface of the cover plate 11, the oil cup rubber layer 21 may be attached to the outer edge of the through hole 113 formed in the outer flange 111. As shown in fig. 8 and 9, in the embodiment in which the oil cup rubber layer 21 and the rubber layer 20 are arranged continuously, the rubber layer 20 is fully covered on the outer plate surface of the cover plate 11, and the oil cup rubber layer 21 is a part of the rubber layer 20, so that the production and the processing are more convenient.

Example III

In this embodiment, the hub shroud 10 includes a disc-shaped cover plate 11, an axially extending shroud ring 12 is disposed at the edge of the plate body of the cover plate 11, a rubber layer 20 is coated at the mouth of the shroud ring 12, and the rubber layer 20 continuously coats the end face and the outer ring face of the mouth of the shroud ring 12.

As shown in fig. 3, in this embodiment, the skeleton of the hubcap 10 is in a thin-walled shell shape, and the cover ring 12 is disposed on the inner side of the cover plate 11, so that the axial dimension of the hubcap 10 can be increased under the premise of adopting lower production cost, and further, the continuously arranged rubber layers 20 are continuously attached to two adjacent outer surfaces, namely the outer ring surface and the ring opening end surface of the cover ring 12, so that the attaching area of the rubber layers 20 in the axial direction of the hubcap 10 is larger, and in this way, in the use state, the circumferential sealing area of the hub inner wall of the hubcap 10, which is supported by the wheel, is larger, the axial extension dimension is longer, and the sealing performance of the hubcap 10 under the condition of deflection can be further improved.

Example IV

The difference between this embodiment and the third embodiment is that the rubber layer 20 continuously covers the outer ring surface, the end surface of the ring opening, and the inner ring surface of the cover ring 12. In the embodiment shown in fig. 3, the rubber layer 20 attached to the end face of the rim 12 is easily separated from the rim 12, and it is difficult to ensure the sealing effect of the end face of the rim 12 and the corresponding stepped face on the thrust wheel hub in the assembled state. In this embodiment, the rubber layer 20 extends toward the inner ring surface of the shroud ring 12, so that the reliability of connection between the rubber layer 20 and the shroud ring 12 can be improved, and the sealing performance of the assembled state of the hub cap 10 can be further ensured.

Example five

The difference between this embodiment and the fourth embodiment is that the rubber layer 20 continuously covers the inner ring surface, the end surface of the ring opening, the outer ring surface and the outer plate surface of the cover plate 11 of the cover ring 12. As shown in fig. 5, the outer edge of the rubber layer 20 is located at the outer plate surface of the cover plate 11, and the inner edge is located at the inner overall surface of the shroud ring 12, so that the reliability of the attachment of the rubber layer 20 at the outer ring surface and the ring opening end surface of the shroud ring 12 can be effectively ensured, and the sealing effect of the hub cover 10 on the hub end surface during specific implementation can be further ensured.

In this embodiment, a cylindrical outer flange 111 is provided in the middle of the cover plate 11, and a cavity 112 is correspondingly formed inside the outer flange 111. The outer part 111 is provided with a through hole 113 for connecting with the oil cup 30, the outer edge of the through hole 113 is coated with an oil cup rubber layer 21, and the oil cup rubber layer 21 and the rubber layer 20 are arranged at intervals.

Example six

The difference between this embodiment and the fifth embodiment is that the through hole 113 is not formed on the outer flange 111, and the rubber layer 20 is fully covered on the outer plate surface of the cover plate 11, so that the attachment processing of the rubber layer 20 is more convenient. When the user opens the through hole 113 on the outer part 111 according to the user's requirement, the rubber layer 20 arranged on the outer surface of the outer part 111 can be directly used as the oil cup rubber layer 21 to be lined between the oil cup 30 and the plate body of the cover plate 11.

In this embodiment, in order to facilitate the assembly of the hub cap 10, a recess 22 is provided in the rubber layer 20 at the junction between the rim end surface and the outer peripheral surface of the cap ring 12. The thickness of the concave portion 22 in the radial direction of the shroud ring 12 is smaller than the thickness of the rubber layer 20 at the outer peripheral surface of the shroud ring 12, and the concave portion 22 is continuously arranged around the circumferential direction of the shroud ring 12. The provision of the recess 22 allows the operator to more easily guide the shroud ring 12 into the bore of the thrust wheel hub and to reserve space for the rubber extrusion deformation material after assembly. The recess 22 in this embodiment is in transitional engagement with the rubber layer 20 at the outer peripheral surface of the shroud ring 12 by a bevel, which further facilitates the introduction of the shroud ring 12 into the hub bore.

Example seven

The present embodiment is different from the fifth embodiment in that the outer flange 111 is truncated cone-shaped, a through hole 113 for connection with the oil cup 30 is formed in the outer flange 111, and the oil cup 30 is mounted at the through hole 113. Thus, the muddy sand adhering to the circumferential direction of the outer flange 111 is more likely to fall off, and is easy to clean, and the sand and the obstacle accumulated on the hub cap 10 are pressed against and damage the outer surface of the hub cap 10.

Example eight

The present embodiment is different from the seventh embodiment in that the outer flange 111 includes a base portion having a tapered ring shape and an oil cup connecting portion having a tubular shape. The outer end face of the outer flange 111 is shielded by the oil cup 30, the outer end face of the outer flange 111 is not in a platform shape, the trafficability is better, obstacles can be avoided better, and dirt or sediment caused by damaging the cover body of the hub cover 10 by extrusion of the obstacles is prevented from entering the hub of the thrust wheel.

Example nine

In this embodiment, as shown in fig. 10 and 12, the thrust wheel hub 41 is provided with a sealing section 411 for accommodating the hub cover 10, the inner end of the sealing section 411 is provided with a limiting step 412 for connection, and the outer end is provided with a ring groove 413. As shown in fig. 11 and 13, in the hub sealing structure of the thrust wheel, the snap springs 50 are clamped in the annular grooves 413 to drive the axial end face of the hub cover 10 to abut against the limiting step 412 and prevent the hub cover 10 from axially outwards displacing along the hub 41, and the rubber layer 20 is arranged between the outer end face of the limiting step 412, the inner peripheral wall of the sealing section 411 and the hub cover 10 in a lining manner.

The rubber layer 20 ensures a sealing engagement between the inner peripheral wall of the sealing section 411, the limit step 412 and the hub cap 10. The inner peripheral wall of the sealing section 411 is in sealing fit with the plate edge of the cover plate 11 of the hub cover 10 or the outer ring surface of the cover ring 12, and the limit step 412 is in sealing fit with the inner plate surface of the cover plate 11 of the hub cover 10 or the ring opening end surface of the cover ring 12, so that the sealing performance of the hub cover 10 in the condition of changing the posture in the use state can be remarkably improved, and the reliable operation of the thrust wheel hub and the internal structure thereof can be protected.

Because the rubber layer 20 is easy to be damaged when being used for a long time, in the embodiment, the rubber layer 20 is attached to the hub cover 10, so that when the sealing effect cannot meet the requirement due to the damage of the rubber layer 20, the sealing performance of the outer end of the hub can be rapidly and effectively improved by replacing the hub cover 10. In other embodiments, the rubber layer 20 may be attached to the inner wall surface of the thrust wheel hub, or a rubber pad may be lined between the thrust wheel hub and the hub cover 10, but the convenience of replacement or installation is greatly reduced, which is not beneficial to the use and maintenance of the thrust wheel.

Claims (9)

1. The utility model provides a thrust wheel seal structure, be equipped with on thrust wheel hub (41) and be used for holding sealed section (411) of wheel hub shroud (10), the inner of sealed section (411) is equipped with spacing step (412) and meets, the outer end is equipped with annular (413), drive the axial terminal surface of wheel hub shroud (10) to prop up and press on spacing step (412) and prevent wheel hub shroud (10) along wheel hub (41) axial outside displacement, its characterized in that in annular (413): a rubber layer (20) is arranged between the outer end face of the limit step (412), the inner peripheral wall of the sealing section (411) and the hub cover (10), and the rubber layer (20) is attached to the hub cover (10).

2. A hubcap, characterized by: the hub cover cap (10) comprises a cover plate (11) which is integrally disc-shaped, a rubber layer (20) is coated at the edge of the plate body of the cover plate (11), and the rubber layer (20) continuously coats the plate edge and the inner plate surface of the cover plate (11).

3. The hub cap as set forth in claim 2, wherein: the rubber layer (20) continuously coats the outer plate surface, the plate edges and the inner plate surface of the cover plate (11).

4. A hub cover according to claim 2 or 3, wherein: an outer protruding part (111) is arranged in the middle of the plate body of the cover plate (11), and a concave cavity (112) is correspondingly formed on the inner side of the outer protruding part (111);

the outer part (111) is provided with a through hole (113) for being connected with the oil cup (30), the outer edge of the through hole (113) is coated with an oil cup rubber layer (21), and the oil cup rubber layer (21) and the rubber layer (20) are arranged continuously or at intervals.

5. A hubcap, characterized by: the hub cover cap (10) comprises a cover plate (11) which is integrally disc-shaped, an axially extending cover ring (12) is arranged at the edge of the plate body of the cover plate (11), a rubber layer (20) is coated at the ring opening of the cover ring (12), and the rubber layer (20) continuously coats the end face of the ring opening of the cover ring (12) and the outer ring face.

6. The hub cap as set forth in claim 5, wherein: the rubber layer (20) continuously coats the outer ring surface, the ring opening end surface and the inner ring surface of the cover ring (12).

7. The hub cap as set forth in claim 5, wherein: the rubber layer (20) continuously coats the inner ring surface, the ring opening end surface, the outer ring surface and the outer plate surface of the cover plate (11) of the cover ring (12).

8. The hub cap as set forth in claim 5, wherein: the rubber layer (20) at the joint of the end face of the ring opening of the cover ring (12) and the outer peripheral surface is provided with a concave part (22), the thickness of the concave part (22) in the radial direction of the cover ring (12) is smaller than that of the rubber layer (20) at the outer peripheral surface of the cover ring (12), the concave part (22) is in transitional connection with the rubber layer (20) at the outer peripheral surface of the cover ring (12) through an inclined plane, and the concave part (22) is circumferentially and continuously arranged around the cover ring (12).

9. The hub cap of any of claims 5-8 wherein: an outer protruding part (111) is arranged in the middle of the plate body of the cover plate (11), and a concave cavity (112) is correspondingly formed on the inner side of the outer protruding part (111);

the outer part (111) is provided with a through hole (113) for being connected with the oil cup (30), the outer edge of the through hole (113) is coated with an oil cup rubber layer (21), and the oil cup rubber layer (21) and the rubber layer (20) are arranged continuously or at intervals.