High-fastening expansion bolt structure

Abstract

The utility model discloses a high-fastening expansion bolt structure which comprises a screw rod, nuts and an expansion pipe, the number of the nuts is two, the two nuts are arranged at the two ends of the screw rod in a threaded and sleeved mode respectively, the expansion pipe is an inclined expansion pipe and comprises a first pipe body and a second pipe body, and the first pipe body and the second pipe body are both connected with the screw rod in a sleeved mode and arranged between the two nuts. Gaskets are adjustably arranged at the ends, close to the expansion pipe, of the nuts on the two sides. Compared with the prior art, the high-fastening expansion bolt structure has the advantages that the fixing effect is high, and the fixing strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to a high-tightening expansion bolt structure. Background Art

[0002] Expansion bolts generally refer to metal expansion bolts. The fixation of expansion bolts uses the wedge-shaped slope to promote expansion and produce friction and grip force to achieve a fixing effect. They are generally used for fastening guardrails, awnings, air conditioners, etc. on cement, bricks and other materials.

[0003] However, in actual work, the size of the expansion bolts often does not meet the force requirements of the objects to be fixed, and large objects are often not firmly fixed. The objects may even move due to the expansion bolts not being firmly fixed, thus causing safety hazards. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a high-fastening expansion bolt structure with high fixing effect and increased fixing strength.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a high-tightening expansion bolt structure, including a screw, a nut, and an expansion tube, the nuts are provided with two and are respectively threadedly sleeved on the two ends of the screw, the expansion tube is an oblique expansion tube including tube one and tube two, the tube one and tube two are both sleeved with the screw and arranged between the two nuts, and the nuts on both sides are adjusted with gaskets near one end of the expansion tube.

[0006] As an improvement, the opposing surfaces of the tube 1 and the tube 2 are provided with an oblique cut surface, and the oblique cut surface is 45°.

[0007] As an improvement, a spring washer is provided between the tube 1 and the nut.

[0008] As an improvement, the beveled section is arranged in the shape of an arc section.

[0009] The advantages of the utility model compared with the prior art are: when used in the present application, the beveled section is in the shape of an arc, which can ensure that the expansion force is evenly distributed on the surface of the expansion body when fixed, reducing the possibility of point pressure concentration, and improving the stability and reliability of the device. At the same time, through two obliquely matched tubes one and two, it can be tilted and expanded to one side when used, so that it can be firmly fixed in the wall to form a reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The schematic diagram of the structure is a high-tightening expansion bolt structure.

[0011] Figure 2The present invention is a structural schematic diagram of a high-tightening expansion bolt structure when in use.

[0012] As shown in the figure: 1. Screw; 2. Nut; 3. Tube 1; 4. Tube 2; 5. Gasket; 6. Bevel cut surface. DETAILED DESCRIPTION

[0013] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0014] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0015] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly connected by technicians in the technical field to which the present invention belongs. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0018] Please refer to the attached Figure 1-2

[0019] A high-tightening expansion bolt structure comprises a screw rod 1, a nut 2 and an expansion tube.

[0020] There are two nuts 2, which are respectively sleeved on the two ends of the screw 1. The expansion tube is an oblique expansion tube, including tube 1 3 and tube 2 4. Tube 1 3 and tube 2 4 are both sleeved on the screw 1 between the two nuts 2. The nuts 2 on both sides are adjusted near the end of expansion tube 1 3 and are provided with gaskets 5.

[0021] Among them, the opposite surfaces of tube 1 3 and tube 2 4 are provided with beveled sections 6, and the angle of the beveled sections 6 is 45°. A spring washer is connected between tube 1 3 and nut 2, which has a certain elasticity and can absorb and alleviate the stress and vibration caused by vibration, impact or unbalanced load, maintain the tightening force of the bolt structure, and provide a long-lasting and stable force effect. At the same time, the beveled section 6 in the present application adopts an arc-shaped section setting to reduce stress concentration and increase the fixing strength.

[0022] When the utility model is implemented, after drilling a hole with an impact drill, the device is placed in the hole, and after adjustment, the nut can be tightened, and the 45-degree inclined expansion tube expands under the action of external force, thereby firmly fixing it in the wall and completing the fixed use. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0023] The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0024] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A high-tightening expansion bolt structure, comprising a screw rod (1), a nut (2), and an expansion tube, characterized in that: The nuts (2) are provided with two and are respectively threadedly sleeved on the two ends of the screw rod (1); the expansion tube is an oblique expansion tube comprising a tube 1 (3) and a tube 2 (4); the tube 1 (3) and the tube 2 (4) are both sleeved on the screw rod (1) and are arranged between the two nuts (2); the nuts (2) on both sides are adjusted with gaskets (5) near the end of the expansion tube 1 (3).

2. A high-tightening expansion bolt structure according to claim 1, characterized in that: The opposing surfaces of the tube 1 (3) and the tube 2 (4) are both provided with an oblique cut surface (6), and the oblique cut surface (6) is 45 degrees.

3. A high-tightening expansion bolt structure according to claim 1, characterized in that: A spring washer is provided between the tube 1 (3) and the nut (2).

4. A high-tightening expansion bolt structure according to claim 2, characterized in that: The oblique angle section (6) is arranged in the shape of an arc section.

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