CN209892751U

CN209892751U - Seal assembly for a through-bore shaft

Info

Publication number: CN209892751U
Application number: CN201822175847.XU
Authority: CN
Inventors: 李让书
Original assignee: Ooros Automotive Co Ltd
Current assignee: Qoros Automotive Co Ltd; Ooros Automotive Co Ltd
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2020-01-03
Anticipated expiration: 2028-12-24

Abstract

The utility model relates to a seal assembly for hole axle, seal assembly are used for sealing in axis of rotation (7) department of the column hole of passing sheet metal component (1), and seal assembly includes: the annular end part clamping sleeve (2) is positioned on one side of the sheet metal part (1); the end part clamping sleeve (2) clamps one ends of the outer sealing part and the inner sealing part on the edge of the hole of the sheet metal part (1), and the inner sealing part (4) is closer to the end part clamping sleeve (2) than the outer sealing part (3); and the shaft end clamping sleeve is clamped into a ring shape and surrounds the rotating shaft (7), and is configured to hold the other ends of the outer sealing element and the inner sealing element and form a cavity between the outer sealing element and the inner sealing element, and meanwhile, the other ends of the outer sealing element and the inner sealing element are abutted against the rotating shaft (7).

Description

Seal assembly for a through-bore shaft

Technical Field

The present invention relates to a seal assembly for a through-hole shaft, for example for use in a vehicle body, for sealing at an axis of rotation passing through a hole of a sheet metal part.

Background

The steering system is a transmission link between a driver and the tires of the vehicle, the steering system needs to start from the driver and end at the tires, and the steering system from the cab to the engine compartment must penetrate through the floor or the front wall of the vehicle body. In order to prevent noise, water and dirt from entering a cab, a seal is required between the vehicle body and the steering system. In real life production, the sealing condition of the through holes of the multiple shafts and the shaft is also good.

The main problem to be solved by the through hole shaft and the through hole sealing is the sealing performance no matter in an automobile or other working conditions, and the through hole shaft and the through hole sealing can contain water sealing, sound sealing, stones, oil and other dirt. At present, the automobile steering system and the automobile body are sealed by various structures, and simultaneously, along with the higher living standard and the higher living standard of people, the requirements of people on the noise and the comfort inside the automobile are higher and higher. And the past sealing member, if sealed tight can cause the axle to rotate the time too big with the frictional force of sealing member, can influence axle transmission performance, the sealing member wearing and tearing are very fast simultaneously, and the sealed effect also can worsen after wearing and tearing. The automobile market is more and more competitive, and the cost is also a problem which each manufacturer has to consider. The traditional sealing element has the defects of poor sealing performance, easy loss, no oil stain resistance, high cost and the like, so that the sealing element with excellent performance effect and low cost and weight needs to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a seal assembly for through hole axle, seal assembly is used for sealing in the axis of rotation department in the hole that passes the sheet metal component. The seal assembly can provide good sealing performance while reducing noise, reducing wear of the seal assembly and reducing cost. Furthermore, according to the utility model discloses a seal assembly of through-hole axle still has resistant greasy dirt and light in weight and increase of service life's advantage.

According to the utility model discloses a seal assembly for through hole axle includes: the annular end part clamping sleeve is positioned on one side of the sheet metal part; an outer seal and an inner seal, wherein the end ferrule captures one end of the outer and inner seals against an edge of the hole of the sheet metal part, and wherein the inner seal is closer to the end ferrule than the outer seal; an end collar annularly shaped and surrounding the rotating shaft, wherein the end collar is configured to retain the other ends of the outer seal and the inner seal and form a cavity between the outer seal and the inner seal while the other ends of the outer seal and the inner seal abut against the rotating shaft.

According to the utility model discloses a seal assembly for through-hole axle is sealed owing to adopted the double-deck sealing layer, and this sealed effect is outstanding. In addition, sound transmission in the cavity is weakened well due to the cavity formed between the outer seal and the inner seal, and thus the sound insulation effect is prominent. At present, the automobile industry is divided into electric vehicles and gasoline vehicles, the engine compartment environment is complex, the main frequency section of the noise of the engine compartment of the vehicle can be analyzed according to the noise sources with different frequencies, different cavity sizes and shapes and the thickness of a sealing layer are designed according to the frequency section, and a better sealing effect can be achieved.

According to a preferred embodiment of the invention, a gap is provided between the shaft end sleeve and the rotary shaft, and the other ends of the outer and inner seal project into the gap and bear with their end faces against the rotary shaft.

According to a preferred embodiment of the present invention, the gap is 1 mm.

According to a preferred embodiment of the present invention, the shaft end ferrule comprises an outer collar and two inner collars, the outer collar is configured to have a T-shaped cross section, the two inner collars are configured to be annular, the inner collars are configured to be able to clamp the inner seal and the outer seal respectively on both sides of the T-shape of the outer collar.

According to a preferred embodiment of the present invention, the inner seal member and the outer seal member have the other end engaged with the shaft end ferrule subjected to thinning treatment at a position contacting the rotation shaft. Thereby improving the sealing effect.

According to the utility model discloses a preferred embodiment, outer sealing member is laminating one side of sheet metal component is constructed with the arch on the surface.

According to a preferred embodiment of the present invention, the protrusion is one of a triangle, a trapezoid and an ellipse.

According to a preferred embodiment of the present invention, the maximum thickness of the protrusion is 2mm, and the thickness of the edge is less than 0.5 mm.

The bulge of the outer layer sealing rubber attached to the sheet metal of the vehicle body can be configured into a lip shape, the thickest part of the lip is not more than 2mm, the edge needs to be less than 0.5mm, and the shape can be triangular, trapezoidal, oval and the like. If the lip thickness is too thick, the sealing rubber is too hard to deform and the sealing effect is reduced.

According to a preferred embodiment of the present invention, grease is applied to a portion of the other end of the inner seal member and the outer seal member, which portion is in contact with the rotation shaft.

According to a preferred embodiment of the invention, the outer seal and the inner seal are made of rubber.

According to the preferred embodiment of the present invention, the outer seal is made of oil-resistant, high-temperature-resistant high-performance rubber, and the inner seal is made of low-performance rubber.

According to a preferred embodiment of the present invention, the end ferrule, the outer collar and the inner collar are made of nylon material.

The utility model discloses in avoid using metal material as far as possible, weight is extremely low, has also reduced manufacturing cost simultaneously.

Drawings

Figure 1 shows a schematic view of a seal assembly for a through bore shaft according to the present invention in an installed state;

FIG. 2 shows an enlarged view of detail A of FIG. 1;

fig. 3 shows an enlarged view of the detail B in fig. 1.

List of reference numerals

1 sheet metal part 2 end part cutting sleeve

3 outer layer seal 4 inner layer seal

5 outer clamping ring and 6 inner clamping ring

7 rotating shaft

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings, and the following description is exemplary and not intended to limit the present invention, and any other similar situations may fall within the scope of the present invention.

In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "front", "rear", and the like, are used with reference to the orientation as illustrated in the drawings. The components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 shows a schematic view of a sealing assembly for a through-bore shaft according to the invention in an installed state. This sealing assembly is used for example in a vehicle, where the body sheet metal is connected with the invention, which needs to be punched with a hole, for example cylindrical, which sealing assembly for a through-hole shaft seals, for example, at the axis of rotation 7 of the vehicle through the hole of the sheet metal part 1, i.e. for sealing between the cabin side, which in fig. 1 is located on the right side of the sealing assembly in fig. 1, and the engine compartment side, which is located on the left side of the sealing assembly in fig. 1.

According to the utility model discloses a seal assembly for through hole axle includes: the annular end part clamping sleeve 2 is positioned on the side of the cockpit of the sheet metal part 1; an outer seal 3 and an inner seal 4, wherein the end ferrule 2 clamps and fixes one end of the outer seal 3 and the inner seal 4 on the edge of the hole of the sheet metal part 1, and wherein the inner seal 4 is arranged closer to the end ferrule 2 than the outer seal 3; and an end collar 5 annularly fitted around the rotating shaft 7, wherein the end collar is configured to hold the other ends of the outer seal member 3 and the inner seal member 4 and form a cavity between the outer seal member 3 and the inner seal member 4 while allowing the other ends of the outer seal member 3 and the inner seal member 4 to abut against the rotating shaft 7. Thereby achieving sealing at the rotating shaft 7.

Fig. 2 shows an enlarged view of the detail a in fig. 1. As can be seen from fig. 2, the outer seal 3 is formed with a projection on the side surface facing the sheet metal part 1. The protrusion may enhance the sealing of the seal assembly. In the shown embodiment the protrusions are triangular, but one of a trapezoid and an ellipse or another suitable shape is also conceivable. The thickest part of the projection is, for example, 2mm at the maximum and the thickness at the edge is, for example, less than 0.5 mm.

Fig. 3 shows an enlarged view of the detail B in fig. 1. In the shown embodiment, the shaft end ferrule comprises an outer collar 5 and two inner collars 6, the outer collar 5 being configured with a T-shaped cross-section, the two inner collars 6 being configured in a ring shape, the inner collars 6 being configured to clamp the inner and

outer seals

4, 3 on both sides of the T-shape of the outer collar 5, respectively.

As can be seen from the enlarged illustration in fig. 3, the shaft end sleeve has a clearance, for example 1mm, from the rotary shaft 7. The end ferrule 2, the shaft end ferrule, i.e. the outer ferrule 5 and the inner ferrule 6, are made of nylon material. The provision of the gap achieves a friction-reducing effect.

The other ends of the outer and

inner sealing elements

3, 4 project into the gap and bear with their end faces against the rotary shaft 7 in order to seal the latter.

In order to reduce the friction between the seal and the rotating shaft, the other ends of the inner seal 4 and the outer seal 3, which are engaged with the shaft end ferrule, are thinned at the position of contact with the shaft 7. For example, the other end may be tapered so that the contact surface is reduced. Other suitable means are of course also conceivable.

In addition, in order to further reduce friction and improve the service life, it is preferable to apply grease to the other ends of the inner seal 4 and the outer seal 3 at a portion contacting the shaft 7.

In the embodiment shown, the outer seal 3 and the inner seal 4 are made of rubber. The outer seal 3 may be made of oil-resistant, high-temperature-resistant high-performance rubber because it is exposed to the engine compartment, but a low-performance rubber material may also be used in the case of an electric vehicle. The inner seal 4 is made of low performance rubber.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A sealing assembly for a through-bore shaft for sealing at a rotating shaft (7) passing through a cylindrical bore of a sheet metal part (1), characterized in that the sealing assembly comprises:

-an annular end ferrule (2) on one side of the sheet metal part (1);

-an outer seal (3) and an inner seal (4), wherein the end ferrule (2) clamps one end of the outer and inner seals against the edge of the hole of the sheet metal part (1), and wherein the inner seal (4) is closer to the end ferrule (2) than the outer seal (3);

-an end collar, which is annularly shaped and surrounds the rotating shaft (7), wherein the end collar is configured to hold the other ends of the outer and inner seal and to form a cavity between the outer and inner seal, while the other ends of the outer and inner seal abut against the rotating shaft (7).

2. A seal assembly for a through-bore shaft according to claim 1, characterized in that a gap is provided between the shaft end sleeve and the rotary shaft (7), and the other ends of the outer and inner seal project into the gap and bear with their end faces against the rotary shaft (7).

3. The seal assembly for a via shaft of claim 2, wherein the gap is 1 mm.

4. A seal assembly for a through-bore shaft according to claim 1 or 2, characterized in that the shaft end ferrule comprises an outer collar (5) and two inner collars (6), the outer collar (5) being configured with a T-shaped cross-section, the two inner collars (6) being configured in a ring shape, the inner collars (6) being configured to clamp the inner seal (4) and the outer seal (3) on both sides of the T-shape of the outer collar (5), respectively.

5. A seal assembly for a through-bore shaft according to claim 1 or 2, characterized in that the other ends of the inner seal (4) and the outer seal (3) which are in ferrule engagement with the shaft end are thinned at the location of contact with the rotating shaft (7).

6. A seal assembly for a through-bore shaft according to claim 1 or 2, characterized in that the outer seal (3) is configured with a bulge on one side surface that abuts the sheet metal part (1).

7. The seal assembly for a via shaft of claim 6, wherein the protrusion is one of triangular, trapezoidal, and oval.

8. The seal assembly for a via shaft of claim 6, wherein a thickest portion of the protrusion is at most 2mm and a thickness at an edge is less than 0.5 mm.

9. A seal assembly for a through-bore shaft according to claim 1 or 2, characterised in that grease is applied at the other end of the inner seal (4) and the outer seal (3) at the point of contact with the rotating shaft (7).

10. A seal assembly for a through-bore shaft according to claim 1 or 2, characterized in that the outer seal (3) and the inner seal (4) are made of rubber.

11. A seal assembly for a through-bore shaft according to claim 1 or 2, characterized in that the outer seal (3) is made of oil-resistant, high-temperature-resistant high-performance rubber and the inner seal (4) is made of low-performance rubber.

12. A seal assembly for a through-bore shaft according to claim 4, wherein the end ferrule (2), the outer collar (5) and the inner collar (6) are all made of a nylon material.