CN209725205U - A kind of oil sealing of dynamic sealing - Google Patents

Abstract

The utility model relates to a dynamic sealing oil seal. The device includes a ring-shaped rubber gasket embedded in the hole of the peripheral device, the end face of the ring-shaped rubber gasket that fits the inner bottom surface of the hole of the peripheral device is the first end face, and the end face of the ring-shaped rubber gasket that conflicts with the end of the peripheral connecting pipe is the second end surface, an annular groove is provided on the outer peripheral surface of the annular rubber gasket, and an annular airbag is bonded in the annular groove, and the inflated annular airbag protrudes from the first end surface and the second end surface. Due to the existence of the annular airbag, during the screwing process of the end of the peripheral connecting pipe, the annular airbag is squeezed, the annular airbag is deformed, the outer wall of the annular airbag is in conflict with the inner wall of the hole of the peripheral device, and the dynamic seal is made. At the same time, the first end surface Together with the annular air bag on one side of the first end surface, it is pressed against the bottom surface of the hole of the peripheral device to form a double seal.

Description

A dynamic sealing oil seal

technical field

The utility model relates to the technical field of oil seals, in particular to a dynamic sealing oil seal.

Background technique

An oil seal patent is disclosed in the existing Chinese patent database. The patent application number is CN94214232.2, the application date is 1994.06.24, the authorization announcement number is CN2198461, and the authorization announcement date is 1995.05.24. The oil retaining ring is composed of an annular groove outside the oil retaining ring. The disadvantage is that the oil seal only relies on the peripheral connecting pipe to squeeze the oil seal main body and the oil retaining ring. Although the oil seal main body and the oil retaining ring are made of rubber material and have certain elasticity, it is difficult to seal tightly.

Utility model content

The purpose of the utility model is to provide an oil seal capable of realizing dynamic sealing according to the degree of tightness of the rotation in view of the deficiencies in the prior art.

In order to achieve the above purpose, the technical scheme adopted by a dynamic sealing oil seal of the utility model:

A dynamic sealing oil seal, including an annular rubber gasket embedded in the hole of the peripheral device, the end face of the ring rubber gasket fitted with the inner bottom surface of the hole of the peripheral device is the first end face, which conflicts with the end of the connecting pipe of the peripheral device The end face of the ring-shaped rubber gasket is the second end face, an annular groove is provided on the outer peripheral surface of the ring-shaped rubber gasket, and an annular airbag is bonded in the annular groove, and the inflated annular airbag protrudes from the first end surface and the second end surface. .

When the utility model works, the annular rubber gasket is embedded in the hole of the peripheral device, so that the annular airbag on the side of the first end face is in contact with the bottom surface of the hole of the peripheral device, and then the peripheral connecting pipe is screwed to the hole of the peripheral device. In the hole, the end part of the peripheral connecting pipe is in contact with the annular airbag on the side of the second end surface. During the screwing process of the peripheral connecting pipe, the end of the peripheral connecting pipe squeezes the annular airbag, and the annular airbag is deformed. The outer wall of the annular airbag is in contact with the inner wall of the hole of the peripheral device for dynamic sealing, and at the same time, the first end surface and the annular airbag on one side of the first end surface are pressed against the bottom surface of the hole of the peripheral device to form a double seal.

Compared with the prior art, the beneficial effect of the utility model is: due to the existence of the annular airbag, during the screwing process of the end of the peripheral connecting pipe, the annular airbag is squeezed, the annular airbag is deformed, and the outer wall of the annular airbag is in conflict with the outside The inner wall of the hole of the device is dynamically sealed, and at the same time, the first end face and the annular airbag on one side of the first end face are pressed against the bottom of the hole of the peripheral device to form a double seal.

An annular shoulder is provided on the annular rubber washer on the second end surface, and the annular shoulder and the annular rubber washer are arranged coaxially.

A pressing flat ring is slidably sleeved on the annular shoulder, and the pressing flat ring is in contact with the annular airbag.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Wherein, 1 is an annular rubber gasket, 101 is a first end face, 102 is a second end face, 103 is an annular groove, 2 is an annular air bag, 3 is an annular shoulder, and 4 is a flat ring.

Detailed ways

As shown in Figure 1, it is a dynamic sealing oil seal, including a ring-shaped rubber gasket 1 embedded in the hole of the peripheral device, and the end face of the ring-shaped rubber gasket 1 attached to the inner bottom surface of the hole of the peripheral device is the first end face 101 The end surface of the annular rubber gasket 1 that conflicts with the end of the peripheral connecting pipe is the second end surface 102, an annular groove 103 is set on the outer peripheral surface of the annular rubber gasket 1, and an annular airbag 2 is bonded in the annular groove 103, The inflated annular airbag 2 protrudes from the first end surface 101 and the second end surface 102, and the annular rubber gasket 1 on the second end surface 102 is provided with an annular shoulder 3, and the annular shoulder 3 and the annular rubber gasket 1 are coaxially arranged , the annular shoulder 3 is slidingly sleeved with a pressing flat ring 4, and the pressing flat ring 4 is in contact with the annular airbag 2.

When working, the annular rubber gasket 1 is embedded in the hole of the peripheral device, so that the annular airbag 2 on the side of the first end surface 101 is in contact with the bottom surface of the hole of the peripheral device, and then the peripheral connecting pipe is screwed to the hole of the peripheral device. In the hole, the end part of the peripheral connecting pipe is touched on the pressing flat ring 4, and the pressing flat ring 4 slides toward the second end face 102, squeezing the annular airbag 2 on the side of the second end face 102, and the annular airbag 2 is deformed. The outer wall of the annular airbag 2 is in contact with the inner wall of the hole of the peripheral device, and is dynamically sealed. At the same time, the first end surface 101 and the annular airbag 2 on the side of the first end surface 101 are pressed against the bottom surface of the hole of the peripheral device to form a double seal.

The utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the utility model, those skilled in the art can make some technical features based on the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present utility model.

Claims (3)

1. a kind of oil sealing of dynamic sealing, including rabbeting the annular rubber gasket in peripheral hardware device aperture, in peripheral device hole The annular rubber gasket end face of bottom surface fitting is first end face, and the annular rubber gasket end face that pipe end conflict is connect with peripheral hardware is Second end face, it is characterised in that: open up annular groove on the outer peripheral surface of the annular rubber gasket, be bonded with ring in annular groove Shape air bag, the prominent first end face of the ring-shaped gasbag of inflation and second end face are arranged.

2. a kind of oil sealing of dynamic sealing according to claim 1, it is characterised in that: positioned at the ring-shaped rubber of second end face Washer is equipped with annular convex shoulder, and annular convex shoulder and annular rubber gasket are coaxially disposed.

3. a kind of oil sealing of dynamic sealing according to claim 2, it is characterised in that: be slidably socketed on the annular convex shoulder There is pressing flat ring, pressing flat ring contradicts on ring-shaped gasbag.