Anti-loose expansion bolt with high tensioning force

Abstract

The utility model discloses a high tension anti-loose expansion bolt which comprises an expansion pipe, a bolt and a nut, the nut is in threaded connection with the bolt, a supporting ring is installed in the center of the interior of the expansion pipe, two V-shaped openings are formed in the two ends of the expansion pipe respectively, the two V-shaped openings are opposite in position, two connecting sleeves are arranged at the two ends of the expansion pipe, and the two V-shaped openings are in threaded connection with the two connecting sleeves respectively. The two connecting sleeves are arranged on the bolt in a sleeving mode, wedge-shaped pieces are arranged on the two connecting sleeves, the head of the bolt is located below the lower connecting sleeve, the top end of a screw rod of the bolt is located above the upper connecting sleeve, the screw rod of the bolt is sleeved with a flat washer, and a connecting ring is installed at the bottom of the flat washer. And the connecting ring is sleeved in the connecting sleeve at the upper part. The expansion pipe has the advantages that the two ends of the expansion pipe can be fixed, the tensioning force is increased, fixing is more stable, the expansion pipe is prevented from shaking in a hole to cause loosening, the expansion pipe is prevented from being bent to generate deformation, and the service life is prolonged.

Description

Technical Field

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

[0002] Expansion bolts are commonly used standard parts, which are composed of countersunk bolts, expansion tubes, flat washers, spring washers and hexagonal nuts. When in use, use an impact drill (hammer) to drill holes of corresponding sizes on the fixed body, then install the bolts and expansion tubes into the holes, and tighten the nuts to expand the bolts, expansion tubes, mounting parts and fixed body into one.

[0003] The utility model with application number CN202322750175.1 discloses a high tension and anti-loosening expansion bolt. Under the drive of the driving member, the moving member is driven to move, so that the internal components of the moving member drive the elastic fixing plate, so that the elastic fixing plate is expanded, and then the inner wall of the wall hole is resisted and fixed. At the same time, when the moving member moves, the fixing member can be driven to squeeze the fixing member toward the inner wall of the wall hole, thereby improving the fixing strength of the bolt and the tension of the bolt, making the bolt more stable.

[0004] The above device is fixed by the elastic fixing plate against the inner wall of the wall hole, and can only fix the inner side of the expansion tube. The inner diameter of the wall hole is generally slightly larger than the diameter of the expansion tube, so it can only fix the inner side of the expansion tube. The outer side of the expansion tube is easy to shake, and the driving part is also easy to shake in the expansion tube. The shaking can easily cause looseness, unstable fixation, and the expansion tube is easy to be completely deformed by force, which reduces the service life.

[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0006] The utility model aims to solve the above problems and designs a high-tension tightening force anti-loosening expansion bolt.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A high-tension tightening force anti-loosening expansion bolt comprises an expansion tube, a bolt and a nut, wherein the nut is threadedly connected to the bolt, a support ring is installed at the center of the expansion tube, two V-shaped openings are provided at both ends of the expansion tube, and the two V-shaped openings are positioned opposite to each other, two connecting sleeves are provided at both ends of the expansion tube, the two connecting sleeves are sleeved on the bolts, and the two connecting sleeves are provided with wedge-shaped pieces, the head of the bolt is located below the lower connecting sleeve, the top end of the screw rod of the bolt is located above the upper connecting sleeve, a flat washer is sleeved on the screw rod of the bolt, a connecting ring is installed at the bottom of the flat washer, and the connecting ring is sleeved in the upper connecting sleeve.

[0009] Furthermore, two ends of the expansion tube are provided with sawtooth convex points, and the sawtooth convex points are located on both sides of the V-shaped opening.

[0010] Furthermore, a spring washer is provided between the connecting ring and the nut.

[0011] Furthermore, the inner diameter of the connecting ring is the same as the diameter of the screw rod of the bolt, and the outer diameter of the connecting ring is the same as the inner diameter of the connecting sleeve.

[0012] Furthermore, the wedge-shaped piece has the same shape as the V-shaped opening, and the size of the wedge-shaped piece is larger than the size of the V-shaped opening.

[0013] Compared with the prior art, this technical solution has the following beneficial effects:

[0014] The wedge-shaped piece on the connecting sleeve is inserted into the V-shaped opening to expand the iron sheets on both sides of the V-shaped opening, so that both ends of the expansion tube can fill the entire hole. Both ends of the expansion tube can be fixed, which increases the tension and fixes more firmly, avoiding the expansion tube from shaking in the hole and causing looseness. The connecting ring is inserted into the connecting sleeve to avoid shaking of the flat washer.

[0015] The support ring increases the strength of the expansion tube, prevents the expansion tube from bending and deformation, and increases its service life;

[0016] After the expansion tube is expanded at the V-shaped opening, the serrated protrusions fit with the inner wall of the hole, which increases the friction force, prevents the expansion tube from rotating, and prevents the expansion tube from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a high-tension tightening force anti-loosening expansion bolt.

[0018] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0019] Figure 3 A cross-sectional view of the expansion tube.

[0020] Figure 4 This is a diagram of the connection status of the connecting ring and the connecting sleeve.

[0021] In the figure: 1. expansion tube; 2. bolt; 3. nut; 4. support ring; 5. V-shaped opening; 6. connecting sleeve; 7. wedge; 8. flat washer; 9. connecting ring; 10. serrated protrusion; 11. spring washer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] The utility model provides Figure 1-4 The high-tension tightening force anti-loosening expansion bolt shown in the figure comprises an expansion tube 1, a bolt 2 and a nut 3, the nut 3 is threadedly connected to the bolt 2, a support ring 4 is installed at the center of the expansion tube 1, two V-shaped openings 5 ​​are provided at both ends of the expansion tube 1, and the two V-shaped openings 5 ​​are located opposite to each other, two connecting sleeves 6 are provided at both ends of the expansion tube 1, the two connecting sleeves 6 are sleeved on the bolt 2, and the two connecting sleeves 6 are provided with wedge-shaped pieces 7, the head of the bolt 2 is located below the lower connecting sleeve 6, the top of the screw of the bolt 2 is located above the upper connecting sleeve 6, a flat washer 8 is sleeved on the screw of the bolt 2, a connecting ring 9 is installed at the bottom of the flat washer 8, and the connecting ring 9 is sleeved in the upper connecting sleeve 6,

[0025] After the expansion tube 1 is inserted into the hole on the ground or wall, the nut 3 is screwed with the bolt 2, the bolt 2 moves outward of the expansion tube 1, and the expansion tube 1 does not move. The head of the bolt 2 drives the lower connecting sleeve 6 to move outward, and at the same time, pressure is applied to the flat washer 8 through the nut 3. The flat washer 8 drives the connecting ring 9 to be inserted into the connecting sleeve 6, and the upper connecting sleeve 6 is moved toward the inside of the connecting sleeve 6 through the flat washer 8. The wedge 7 on the connecting sleeve 6 is inserted into the V-shaped opening 5, so that the iron sheets on both sides of the V-shaped opening 5 are expanded, so that the two ends of the expansion tube 1 fill the entire hole, and both ends of the expansion tube 1 can be fixed, which increases the tension and fixation, and avoids the expansion tube 1 shaking in the hole and causing loosening. The connecting ring 9 is inserted into the connecting sleeve 6 to avoid shaking of the flat washer 8. The strength of the expansion tube 1 is increased by the support ring 4, and the expansion tube 1 is prevented from bending and deforming, thereby increasing the service life.

[0026] Refer to the instruction manual Figure 1 , Instruction Manual Figure 2 And the instruction manual Figure 3 The expansion tube 1 has sawtooth convex points 10 at both ends, and the sawtooth convex points 10 are located on both sides of the V-shaped opening 5.

[0027] After the expansion tube 1 is expanded at the V-shaped opening 5 , the serrated protrusions 10 fit with the inner wall of the hole, increasing the friction force, thereby preventing the expansion tube 1 from rotating and loosening.

[0028] Refer to the instruction manual Figure 1 , Instruction Manual Figure 2 And the instruction manual Figure 4 A spring washer 11 is provided between the connecting ring 9 and the nut 3.

[0029] The spring washer 11 prevents the nut 3 from loosening after being tightened.

[0030] Refer to the instruction manual Figure 4 The inner diameter of the connecting ring 9 is the same as the screw diameter of the bolt 2, and the outer diameter of the connecting ring 9 is the same as the inner diameter of the connecting sleeve 6.

[0031] The connecting ring 9 is completely consistent with the connecting sleeve 6 to prevent the flat washer 8 and the connecting ring 9 from shaking in the connecting sleeve 6.

[0032] Refer to the instruction manual Figure 1 The wedge-shaped member 7 has the same shape as the V-shaped opening 5, and the size of the wedge-shaped member 7 is larger than the size of the V-shaped opening 5.

[0033] The size of the wedge-shaped member 7 is larger than the size of the V-shaped opening 5 , and the V-shaped opening 5 can be fully opened by the wedge-shaped member 7 .

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-tension anti-loosening expansion bolt, comprising an expansion tube (1), a bolt (2) and a nut (3), wherein the nut (3) is threadedly connected to the bolt (2), characterized in that: A support ring (4) is installed at the center of the expansion tube (1). Two V-shaped openings (5) are provided at both ends of the expansion tube (1). The two V-shaped openings (5) are located opposite to each other. Two connecting sleeves (6) are provided at both ends of the expansion tube (1). The two connecting sleeves (6) are sleeved on the bolts (2). The two connecting sleeves (6) are provided with wedge-shaped parts (7). The head of the bolt (2) is located below the lower connecting sleeve (6). The top of the screw of the bolt (2) is located above the upper connecting sleeve (6). A flat washer (8) is sleeved on the screw of the bolt (2). A connecting ring (9) is installed at the bottom of the flat washer (8). The connecting ring (9) is sleeved in the upper connecting sleeve (6).

2. A high tension anti-loosening expansion bolt according to claim 1, characterized in that: The expansion tube (1) is provided with sawtooth-shaped protrusions (10) at both ends, and the sawtooth-shaped protrusions (10) are located on both sides of the V-shaped opening (5).

3. The high tension and anti-loosening expansion bolt according to claim 1, characterized in that: A spring washer (11) is provided between the connecting ring (9) and the nut (3).

4. The high tension and anti-loosening expansion bolt according to claim 1, characterized in that: The inner diameter of the connecting ring (9) is the same as the diameter of the screw rod of the bolt (2), and the outer diameter of the connecting ring (9) is the same as the inner diameter of the connecting sleeve (6).

5. The high tension and anti-loosening expansion bolt according to claim 1, characterized in that: The wedge-shaped piece (7) has the same shape as the V-shaped opening (5), and the size of the wedge-shaped piece (7) is larger than the size of the V-shaped opening (5).

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