High-strength fastener

Abstract

The utility model discloses a high-strength fastener which comprises a first nut and a second nut, a gasket is arranged below the first nut, the second nut is arranged below the gasket, a boss part is arranged above the second nut, a trapezoidal table part is arranged above the boss part, and meanwhile the boss part is sleeved with the gasket. The inner groove portion is arranged below the first nut, the inner thread portion is arranged above the inner groove portion, the boss portion is arranged above the second nut, the trapezoidal table portion is arranged above the boss portion, and the boss portion and the trapezoidal table portion are inserted into the inner groove portion at the same time. The boss part is sleeved with the gasket, the first nut and the second nut form a whole through the structure, the first nut and the second nut jointly fasten the bolt and are made of high-strength materials, and when the nut is vibrated, due to protection of the internal thread part and the external thread part, looseness is prevented, and the possibility of breakage is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a high-strength fastener. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening and connection and are extremely widely used. Fasteners are widely used in industries including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics, etc. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, meters and supplies, etc. They are the most widely used mechanical basic parts. The nut fasteners on existing shield machines are mostly single nuts that are installed separately and then pressed together. Since the nuts are of a single form, and the shield machine has high strength and vibration during operation, the nuts may break and loosen. Therefore, a high-strength fastener is proposed to address the rising problem. Utility Model Content

[0003] The purpose of the utility model is to provide a high-strength fastener to solve the problems raised in the above background.

[0004] In order to solve the above technical problems, the utility model specifically provides the following technical solutions: a high-strength fastener, comprising a first nut and a second nut, a washer is provided under the first nut, and a second nut is provided under the washer, a boss portion is provided above the second nut, and a trapezoidal platform portion is provided above the boss portion, and a washer is provided on the outer sleeve of the boss portion, and the boss portion and the trapezoidal platform portion are inserted upward into the bottom of the first nut.

[0005] Preferably, an inner groove is provided at the bottom of the first nut, and the upper part of the inner groove is in a trapezoidal shape, and an inner thread is provided on the inner peripheral side surface above the inner groove.

[0006] Preferably, a boss portion is fixedly connected to the middle portion above the second nut, and the cross-sectional area of ​​the boss portion is smaller than the cross-sectional area of ​​the second nut.

[0007] Preferably, a sliding connection gasket is disposed outside the boss portion, and there is a distance between the inner wall of the gasket and the outer wall of the boss portion.

[0008] Preferably, the top of the boss portion is fixedly connected to the bottom of the trapezoidal platform portion.

[0009] Preferably, the boss portion and the trapezoidal platform portion are both inserted into the inner groove portion, and the outer wall of the boss portion is tightly fitted with the inner wall below the inner groove portion.

[0010] Preferably, an external thread portion is provided on the peripheral side surface of the trapezoidal platform portion.

[0011] Preferably, the external threaded portion engages with the internal threaded portion.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model has an inner groove portion below the first nut, an inner thread portion above the inner groove portion, a boss portion above the second nut, and a trapezoidal platform portion above the boss portion, and the boss portion and the trapezoidal platform portion are inserted into the inner groove portion at the same time, a washer is arranged on the outer sleeve of the boss portion, and the structure between the first nut and the second nut forms a whole, the two nuts are used to tighten the bolts together, and are made of high-strength material, and when vibrated, due to the protection of the inner thread portion and the outer thread portion, loosening is prevented and the possibility of breakage is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 It is an overall explosion diagram of the utility model;

[0017] Figure 3 It is the overall working schematic diagram of the utility model.

[0018] The reference numerals in the accompanying drawings represent the following:

[0019] 1. First nut; 2. Second nut; 3. Washer; 4. Inner groove portion; 41. Internal thread portion; 5. Boss portion; 6. Trapezoidal boss portion; 61. External thread portion. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3As shown, the utility model provides a high-strength fastener, including a first nut 1 and a second nut 2, a washer 3 is provided under the first nut 1, and the second nut 2 is provided under the washer 3, a boss portion 5 is provided above the second nut 2, and a trapezoidal platform portion 6 is provided above the boss portion 5, and the washer 3 is provided on the outer sleeve of the boss portion 5, and the boss portion 5 and the trapezoidal platform portion 6 are inserted upwardly into the bottom of the first nut 1.

[0022] In this embodiment, an inner groove portion 4 is opened in the lower part of the first nut 1 , and the upper part of the inner groove portion 4 is in a trapezoidal shape. Meanwhile, an internal thread portion 41 is opened on the inner peripheral side surface of the upper part of the inner groove portion 4 .

[0023] Furthermore, a boss portion 5 is fixedly connected to the middle portion above the second nut 2 , and the cross-sectional area of ​​the boss portion 5 is smaller than the cross-sectional area of ​​the second nut 2 .

[0024] An inner groove 4 is provided below the first nut 1 , and an inner thread 41 is provided above the inner groove 4 , so that the upper structure of the second nut 2 is inserted into the inner groove 4 , and the first nut 1 and the second nut 2 are integrated.

[0025] Furthermore, the boss portion 5 is externally provided with a sliding connection in the middle of the washer 3 , and there is a distance between the inner wall of the washer 3 and the outer wall of the boss portion 5 .

[0026] Furthermore, the top of the boss portion 5 is fixedly connected to the bottom of the trapezoidal platform portion 6 .

[0027] Furthermore, the boss portion 5 and the trapezoidal platform portion 6 are both inserted into the inner groove portion 4 , and the outer wall of the boss portion 5 is tightly fitted with the lower inner wall of the inner groove portion 4 .

[0028] A boss portion 5 is provided above the second nut 2, and a trapezoidal platform portion 6 is provided above the boss portion 5. After the two are inserted into the inner groove portion 4 together, when bolts are inserted into the first nut 1 and the second nut 2 for tightening, the boss portion 5 and the trapezoidal platform portion 6 are also tightened with the bolts, and the internal threads that engage with the bolt box are made uniformly.

[0029] Furthermore, an external thread portion 61 is formed on the side surface of the trapezoidal platform portion 6 .

[0030] Furthermore, the external thread portion 61 engages with the internal thread portion 41 .

[0031] When the first nut 1 and the second nut 2 are tightened, the first nut 1 rotates and descends, so that the external threaded portion 61 on the trapezoidal platform 6 engages with the internal threaded portion 41 on the inner groove portion 4. When the first nut 1, the washer 3, and the second nut 2 are tightly fitted, the torque force generated by the tightening of the bolt inside the entire structure and the torque force generated by the external threaded portion 61 and the internal threaded portion 41 will form a certain difference, so as to start the function of preventing loosening.

[0032] Working principle:

[0033] An inner groove portion 4 is provided below the first nut 1, and the upper portion of the inner groove portion 4 is in a trapezoidal shape, and an inner thread portion 41 is provided on the inner circumferential side surface of the trapezoidal shape, a boss portion 5 is provided above the second nut 2, and a trapezoidal platform portion 6 is provided above the boss portion 5, and the boss portion 5 and the trapezoidal platform portion 6 are inserted into the inner groove portion 4 at the same time, and a washer 3 is provided on the outer sleeve of the boss portion 5, and at this time, the washer 3 is located between the first nut 1 and the second nut 2. When not installed, the outer thread portion 61 on the trapezoidal platform portion 6 and the inner thread portion 41 on the inner groove portion 4 are not engaged, and the bottom of the trapezoidal platform portion 6 is hung on the step below the inner groove portion 4. When installing, the second nut 2 is first put on the nut 2 The bolt is tightened, and then the first nut 1 is also tightened on the bolt. When the second nut 2 is in place and the first nut 1 is about to be in place, the internal threaded portion 41 begins to bite the external threaded portion 61. The degree of continuous bite between the two is until the first nut 1 is pressed against the washer 3, thus forming a closed mode of the installation process. At the same time, the first nut 1, the washer 3, the second nut 2 and the internal structure are all made of high-strength materials. When vibrated during work, the first nut 1 is usually loosened by vibration first, and then the second nut 2. The bite between the internal threaded portion 41 and the external threaded portion 61 is equivalent to a protection, making the first nut 1 not easy to be loosened.

[0034] The manual should reflect that, especially on shield machines, higher strength requirements are placed on fasteners.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A high-strength fastener, comprising a first nut (1) and a second nut (2), characterized in that: A washer (3) is provided below the first nut (1), and a second nut (2) is provided below the washer (3); a boss portion (5) is provided above the second nut (2), and a trapezoidal platform portion (6) is provided above the boss portion (5); a washer (3) is provided on the outer sleeve of the boss portion (5); the boss portion (5) and the trapezoidal platform portion (6) are inserted upwards into the lower part of the first nut (1).

2. The high-strength fastener according to claim 1, characterized in that: An inner groove portion (4) is provided at the bottom of the first nut (1), and the upper portion of the inner groove portion (4) is in a trapezoidal shape. An inner thread portion (41) is provided at the inner peripheral side surface of the upper portion of the inner groove portion (4).

3. The high-strength fastener according to claim 2, characterized in that: A boss portion (5) is fixedly connected to the middle portion above the second nut (2), and the cross-sectional area of ​​the boss portion (5) is smaller than the cross-sectional area of ​​the second nut (2).

4. The high-strength fastener according to claim 3, characterized in that: The boss portion (5) is externally provided with a sliding connection in the middle of the gasket (3), and there is a distance between the inner wall of the gasket (3) and the outer wall of the boss portion (5).

5. The high-strength fastener according to claim 4, characterized in that: The top of the boss portion (5) is fixedly connected to the bottom of the trapezoidal platform portion (6).

6. The high-strength fastener according to claim 5, characterized in that: The boss portion (5) and the trapezoidal platform portion (6) are both inserted into the inner groove portion (4), and the outer wall of the boss portion (5) is tightly fitted with the inner wall below the inner groove portion (4).

7. The high-strength fastener according to claim 6, characterized in that: An external threaded portion (61) is provided on the peripheral side surface of the trapezoidal platform portion (6).

8. The high-strength fastener according to claim 7, characterized in that: The external thread portion (61) engages with the internal thread portion (41).

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