CN209977041U - Sealed screw thread reinforcing bush - Google Patents

Abstract

The utility model protects a sealing thread reinforcing bushing, the whole sealing thread reinforcing bushing is I-shaped; comprises a hollow cylindrical head with a vertical stripe, a concave neck and a body, wherein the peripheral surface of the body is provided with a thread and a dog tail; the concave neck part is provided with an O-shaped ring, the upper section of the inner part is provided with a large cavity, and the lower section of the inner part is of a threaded structure; the inner bottom is a closed structure; the body and the dog tail are in transition connection through an oblique inlet chamfer. This screw thread reinforcing bush can directly be through the machining shaping, then at recessed neck assembly O type circle, thereby plays the screw thread reinforcing effect through interior external thread structure after the installation on sheet metal, thereby O type circle is compressed and is played sealed effect.

Description

Sealed screw thread reinforcing bush

Technical Field

The utility model relates to a fastener technical field especially relates to a sealed screw thread reinforcing bush.

Background

With the rapid development of economy and technology, the requirement for light weight is higher and higher, and more light alloys such as aluminum alloy, magnesium alloy and the like are beginning to be widely applied to the automobile industry, high-speed rail and the like. However, in the prior art, closed internal threads are mostly directly processed on the light alloy, but the internal threads are often damaged due to the low tensile strength of the light alloy. Moreover, since the internal thread is closed, the light alloy must have a sufficient thickness, which is contrary to the light weight.

The published Chinese utility model patent has the publication number: CN102071881A, patent name: gas well is with sleeve pipe gas seal screwed joint, application date: 20110215 which discloses a gas well casing gas seal threaded joint comprising a threaded joint, a torque shoulder disposed between the threaded joints and a primary seal comprising a first seal adjacent the torque shoulder and a second seal adjacent the threaded joint; the first seal is a conical surface/conical surface seal structure, and the second seal is a conical surface/spherical surface seal structure; the torque shoulder is a-4.5 to-5.5 torque shoulder. The gas well pipe column gas-tight threaded joint solves the technical problems that the existing gas well pipe column gas-tight threaded joint is easy to have thread gluing, unstable sealing, shoulder failure, shoulder corrosion leakage and the like, has good sealing integrity, and can ensure the structure and the sealing integrity of a casing string.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a sealed thread reinforcing bush, the design of the embedded assembly O type circle 9 of neck 2 recessed under the head and internal and external screw thread to ensure to play sealed effect and screw thread reinforcing and locking effect simultaneously after the installation on the parent metal to the lock.

For realizing the utility model discloses the following technical scheme who takes:

a sealed thread reinforcing bushing comprising a hollow cylindrical head 1, a recessed neck 2 and a body 3;

it is characterized in that the preparation method is characterized in that,

the whole of the sealing thread reinforcing bushing is I-shaped;

the outer peripheral surface of the body 3 is provided with an external thread 4 and a dog tail 5; the body 3 and the head 1 are in transition connection through a neck 2 with a concave part;

the upper section inside the body 3 is provided with a large cavity 6;

the lower section 7 in the body 3 is of an internal thread structure;

the inner bottom 8 of the body 3 is of closed construction;

the body 3 and the dog tail 5 are in transition through an oblique inlet chamfer;

the neck 2 recessed below the head is fitted inside with an O-ring 9.

Preferably, the head portion 1 is externally provided with a vertical knurling structure.

Preferably, the nominal diameter of the external thread 4 is much greater than the nominal diameter of the internal thread of the inner lower section 7.

Preferably, the inlet chamfer has an inclination angle of 30 degrees.

Preferably, the neck 2 recessed below the head is deformed to bulge when mounted.

Preferably, the thread reinforcing bushing is made of steel or stainless steel.

Preferably, the neck 2 is provided with a plane round corner.

The beneficial effects of the utility model reside in that: set up recessed neck 2 under the product head, then add O type circle 9 and interior external screw thread structure to can realize playing the screw thread reinforcing simultaneously after the assembly, locking and sealed effect.

Drawings

Fig. 1 is a front view of the present application.

Fig. 2 is a schematic view of the shape of the opening of the base material of the lock.

Fig. 3 is a perspective view of the present application.

Fig. 4 is a schematic view after assembly.

In the figure, the position of the upper end of the main shaft,

1. a head portion; 2. a neck portion; 3. a body; 4. an external thread; 5. dog tails; 6. a large cavity; 7. an inner lower section; 8. an inner bottom; 9. an O-shaped ring; 10. a counter bore; 12. a parent material of the lock; 13. the liner is reinforced.

Detailed Description

The present invention will now be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way.

As shown in fig. 4: in the figure 12 is the base material of the counter lock, generally of light alloy material, such as aluminium alloy, 13 is the sealing thread reinforcing bush installed in the base material of the counter lock;

the utility model provides a sealing thread reinforcing bushing, which comprises a hollow cylindrical head part 1, a concave neck part (2) and a body 3;

the whole of the sealing thread reinforcing bushing is I-shaped;

the outer peripheral surface of the body 3 is provided with an external thread 4 and a dog tail 5; the body 3 and the head 1 are in transition connection through a neck 2 with a concave part;

the upper section inside the body 3 is provided with a large cavity 6;

the lower section 7 in the body 3 is of an internal thread structure; the diameter of the large cavity 6 is larger than the major diameter of the internal thread of the inner lower section 7;

the inner bottom 8 of the body 3 is of closed construction; the closed structure can play a role of sealing, and liquid or gas is prevented from flowing to the other side from the bottom of the sealing thread reinforcing bushing;

the body 3 and the dog tail 5 are in transition through an oblique inlet chamfer;

the neck 2 recessed below the head is fitted inside with an O-ring 9. O type circle 9 can select for use different materials according to the customer to high temperature resistance demand, can play high temperature resistance effect.

In the present embodiment, it is preferable that the hollow head portion 1 is externally provided with a vertical knurling structure.

In the preferred embodiment, the inlet chamfer angle is controlled to be 30 degrees, which is beneficial to playing a guiding role when the sealing thread reinforcing bushing is installed, so that the sealing thread reinforcing bushing can be smoothly screwed into the internal thread on the base metal of the counter lock.

In the present embodiment, the recessed neck 2 and the internal upper cavity 6 form a deformable zone. When the hollow head 1 is subjected to sufficient pressure, the recessed neck deforms to form a bulge, shortening the overall length of the sealing thread reinforcing bushing, so that the hollow head 1 can be pressed into the parent material of the counter lock.

In the preferred embodiment, the thread reinforcing bushing is made of steel or stainless steel.

Preferably, in this embodiment, the neck portion 2 is provided with a plane round corner.

In the present embodiment, it is preferable that the inner diameter of the O-ring 9 is equal to or slightly smaller than the outer diameter of the recessed neck portion 2, so that it is ensured that the O-ring 9 does not fall off the recessed neck portion 2.

In the preferred embodiment, the outer diameter of the O-ring 9 is larger than the diameter of the counter bore 10 in the base 12 of the counter lock, so as to ensure that the O-ring 9 has a certain pre-compression amount when pre-installed (the external thread 4 of the sealing thread reinforcing bush is screwed into the internal thread in the base 12 of the counter lock until the lower surface of the hollow head 1 and the surface of the base 12 of the counter lock are flush), and that the O-ring abuts against the lower surface of the head 1.

In the embodiment, preferably, the outer diameter of the vertical knurling structure arranged on the hollow head portion 1 is larger than the diameter of the counter bore 10 on the counter lock base metal 12, so that the head portion 1 of the sealing thread reinforcing bushing is ensured to be pressed into the counter lock base metal 12 in an interference manner, the sealing thread reinforcing bushing is ensured not to rotate on the counter lock base metal 12, and a locking effect is achieved.

In this embodiment, the hollow head 1 is preferably flush with the surface of the counter lock base 12 after being pressed into the counter lock base 12.

In the preferred embodiment, after assembly, the O-ring 9 is compressed by the head 1, the counter bore 10 in the lock base 12 and the neck bulge 16 to ensure that the O-ring 9 has sufficient compressive deformation to seal after installation.

In this embodiment, preferably, through the internal and external thread structure and the nominal diameter of external screw thread is far greater than the nominal diameter of internal screw thread, can transmit the power that the internal thread bore to the external screw thread that the stress surface is bigger and the internal thread of the mating lock parent metal of assorted, play the effect of screw thread reinforcing, can match 8.8 grades, 10.9 grades or even 12.9 grades of mating lock bolt.

In the embodiment, the internal thread and the external thread are preferably arranged, the nominal diameter of the external thread is far larger than that of the internal thread, the base material of the counter lock with lower tensile strength is protected while the thread increasing effect is achieved, and the risk that the internal thread is damaged on the base material of the counter lock is greatly reduced. Thanks to the thread reinforcing function and the sealing function, the base metal 12 of the lock can be thinner and can be provided with a through hole, so that the effect of light weight is achieved, and the manufacturing cost is saved.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (7)

1. A sealed thread reinforcing bushing comprising a hollow cylindrical head (1), a recessed neck (2) and a body (3);

it is characterized in that the preparation method is characterized in that,

the whole of the sealing thread reinforcing bushing is I-shaped;

the outer peripheral surface of the body (3) is provided with an external thread (4) and a dog tail (5); the body (3) and the head (1) are in transition connection through a concave neck (2);

the upper section inside the body (3) is provided with a large cavity (6);

the lower section (7) in the body (3) is of an internal thread structure;

the inner bottom (8) of the body (3) is of a closed structure;

the body (3) and the dog tail (5) are in transition through an oblique inlet chamfer;

the neck (2) recessed below the head is fitted with an O-ring (9) in an insert manner.

2. A sealing thread reinforcing bushing according to claim 1, characterized in that the head (1) is externally provided with a vertical knurling.

3. A sealing thread reinforcing bushing according to claim 2, characterized in that the nominal diameter of the external thread (4) is much larger than the nominal diameter of the internal thread of the inner lower section (7).

4. A seal thread reinforcing bushing according to claim 3, wherein the inlet chamfer angle is 30 degrees.

5. A seal thread reinforcing bushing according to claim 4, characterized in that the neck (2) recessed below the head is deformed to form a bulge when mounted.

6. A seal thread reinforcing bushing according to claim 5, wherein the thread reinforcing bushing is made of steel or stainless steel.

7. A sealing thread reinforcing bushing according to claim 6, characterized in that the neck (2) is provided with a planar fillet.

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