CN101629594A - Spring cushion expansion type easy-disassembling strengthening expansion bolt - Google Patents

Abstract

A spring pad contraction and expansion type easy-to-disassemble strong expansion bolt, the bolt is a cylinder, one end has a thread for fastening the nut, the other end is a conical truncated cone, the spring pad is circular, and has an opening; the section of the spring pad is trapezoidal ;The gasket is a circular gasket without opening, and the section of the gasket is trapezoidal; the sealing gasket is a disc structure, and the size of the middle hole of the spring washer, washer, and sealing gasket is slightly larger than the diameter of the cylindrical part of the bolt, and they are inserted into the bolt And can move flexibly. After the spring pad shrinkage type easy-to-remove strong expansion bolt is placed in the installation hole, the sealing gasket is flush with the surface of the installation hole, the nut is rotated, the bolt is tightened, and the bolt, washer, and sealing gasket work together to expand the spring pad. It is closely combined with the four walls in the installation hole. Because there are more than one joint surface with the four walls, the force it can withstand is much larger than that of ordinary expansion bolts. When it needs to be disassembled, loosen the nut, the spring pad shrinks, and disengages from the four walls in the installation hole, so that it can be taken out conveniently.

Description

Spring pad contraction and expansion type easy to disassemble strong expansion bolts

technical field

The invention relates to a spring pad contraction and expansion type easy-to-disassemble strong expansion bolt, which belongs to the field of installation and fixing materials.

Background technique

Known expansion bolts are made of metal expansion tubes, bolts, washers and nuts. One end of the bolt is a truncated conical truncated conical bottom that acts as a support for expansion, and the diameter of the truncated conical bottom is the same as that of the metal expansion tube. The other end of the bolt is a standard stud. There are multiple open slots at one end of the metal expansion tube, and the end with open slots faces the bottom of the truncated cone on the bolt, and is set on the bolt, and the nut is screwed on the bolt, and the nut is tightened. Enter the cavity of the expansion tube at one end of the open groove, so as to expand and fasten in the borehole of the object. The problems that occur in the use of such expansion bolts are: 1. There is only an expansion force point at its end, and the expansion and fastening effect is poor, and the bolt at the other end of the nut is prone to lateral deviation. 2. After expansion and bending deformation, the metal expansion sleeve will not return to its original shape due to the disappearance of external force. Since the metal expansion tube is clamped in the installation hole and often does not expose the installation hole, to take out the expansion bolt, the expansion screw with the conical nail head or the conical nut can only be forcibly pulled, so that the expansion sleeve will further expand. Expands and snaps tightly into the mounting hole. In this case, if you continue to increase the pulling force, even if you can barely pull it out, it will damage the wall or the ground. And the expansion sleeve after taking out has deformed, is difficult to use again. We often encounter expansion bolts installed in walls or hardened ground that need to be removed but are difficult to remove. These expansion bolts protruding from the wall or hardened ground have caused us a lot of inconvenience and seriously affected the appearance.

Contents of the invention

In order to overcome the deficiencies of the existing expansion bolt structure in this respect, the present invention provides a spring pad contraction and expansion type easy-to-disassemble strong expansion bolt.

The solution adopted by the present invention to solve the deficiencies in the structure of the expansion bolt is: a kind of spring pad contraction and expansion type easy-to-disassemble strong expansion bolt, including bolts, spring pads, washers, sealing gaskets and nuts, the bolt is a cylinder, and one end has a There are threads for fastening nuts, the other end is a truncated cone, the section of the spring pad is trapezoidal; the spring pad is circular and has an opening. The gasket is a circular gasket without opening, and the section of the gasket is trapezoidal; the sealing gasket is a disc structure, and the size of the middle hole of the spring washer, washer, and sealing gasket is slightly larger than the diameter of the cylindrical part of the bolt, which is a transitional fit. into the bolt and move flexibly.

The benefit of the present invention is that after the spring pad contraction-expanding type easy-to-disassemble strong expansion bolt is placed in the installation hole, the sealing gasket 4 is flush with the surface of the installation hole, the nut 5 is tightened, the bolt 1 is tightened, the bolt 1, the washer 3, The sealing gasket 4 works together to make the spring pad 2 expand and tightly combine with the four walls in the mounting hole. Since there are more than one joint surface with the four walls, the force it can withstand is much larger than that of ordinary expansion bolts. When it needs to be dismantled, loosen the nut 5, the spring pad 2 shrinks, disengages from the four walls in the mounting hole, and can be easily taken out.

Description of drawings

Fig. 1 is the cross-sectional view of the spring pad contraction and expansion type easy-to-disassemble strong expansion bolt;

FIG. 2 is a front view of the spring pad 2 and the washer 3 .

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Detailed ways

Example 1:

It consists of bolt 1, spring washer 2, washer 3, sealing gasket 4 and nut 5. See Figure 1. Described bolt 1 is cylinder, and one end has the screw thread that is used for tightening nut 5 usefulness, and the other end is a truncated cone, and the sectional angle of its truncated cone matches the side angle of the trapezoidal section of spring pad 2 . The sectional view of the spring pad 2 is trapezoidal as shown in Figure 1; the front view is shown in Figure 2, which is a circular gasket with an opening to expand under force. The cross-sectional view of the gasket 3 is trapezoidal as shown in Figure 1; the front view is shown in Figure 2, it is a circular gasket without openings, and the side angle of the trapezoidal cross-section of the gasket 3 matches the trapezoidal side angle of the cross-sectional trapezoid of the spring pad 2 . The sealing gasket 4 is a disc structure, and the cross-sectional view is shown in Fig. 1. One side of the sealing gasket 4 is a plane contacting with the fastening nut 5, and the other side is a slope to match the angle of the trapezoidal side of the spring pad 2. Wherein, the size of the middle hole of the spring pad 2, the washer 3, and the sealing gasket 4 is slightly larger than the diameter of the cylindrical part of the bolt 1, so that they can be inserted into the bolt 1 and can move flexibly.

Figure 1 is only a schematic diagram. Since the spring pad 2 and the washer 3 are movable parts, the number of the spring pad 2 and the washer 3 can also be increased at the same time as the length of the bolt 1 of the spring pad shrinkage-expanding type easy-to-disassemble strong expansion bolt increases, so that the spring pad shrinks and expands The easy-to-disassemble strong expansion bolts will also increase the bearing capacity. Of course, the diameter of the bolt 1 can also be changed as required.

Example 2:

As shown in Figure 1, the sectional view of the spring pad contraction and expansion type easy-to-disassemble strong expansion bolt is composed of a bolt 1, a spring pad 2, a washer 3, a sealing pad 4 and a nut 5, and the washer 3 is in the middle of the two spring pads 2.

When in use, first put the spring pad contraction and expansion type easy-to-disassemble strong expansion bolt into the drilling hole of the object, the sealing gasket 4 is flush with the installation hole surface, and the axial tension acts when the nut 5 is fastened, and the gasket 3 and the sealing gasket 4 and the truncated cone of the bolt 1 work together, the spring pad 2 expands and is closely combined with the four walls in the installation hole, so that since multiple spring pads 2 (the spring pad 2 and the washer 3 form a group of expansion pairs, more than two The expansion pair of the group) expands and combines with the four walls, its firmness and stress effect are good, and the bolts are not easy to loosen or sideways.

Example 3:

The installed spring pad shrinkage expansion type is easy to disassemble the strong expansion bolt. When it needs to be disassembled, loosen the nut 5, the spring pad 2 shrinks, and disengages from the four walls in the installation hole, and can be easily taken out for repeated use.

Claims (4)

1. A spring pad contraction and expansion type easy-to-disassemble strong expansion bolt, characterized in that it includes bolts, spring pads, washers, sealing gaskets and nuts, the bolt is a cylinder, and one end has a thread for tightening the nut , the other end is a truncated cone, the spring pad is round and has an opening; the section of the spring pad is trapezoidal; the gasket is a circular gasket without opening, and the section of the gasket is trapezoidal; The size of the middle hole of the washer and the sealing gasket is slightly larger than the diameter of the cylindrical part of the bolt, which is a transition fit, and can be inserted into the bolt and can move flexibly. 2. The spring pad contraction and expansion type easy-to-disassemble strong expansion bolt according to claim 1, characterized in that the section angle of the truncated cone of the bolt matches the side angle of the trapezoidal section of the spring pad, and the side angle of the trapezoidal section of the washer It is adapted to the side angle of the trapezoidal section of the spring pad, one side of the section of the sealing gasket is a flat surface in contact with the fastening nut, and the other side is a slope to match the side angle of the trapezoidal section of the spring pad. 3. According to claim 1 or 2, the expansion bolt with shrinkable and expandable spring pads can be disassembled easily, and it is characterized in that the washer is in the middle of the two spring pads. 4. According to claim 1 or 2, the spring pad contraction and expansion type easy-to-disassemble strong expansion bolt is characterized in that the spring pad and the washer form a set of expansion pairs, and two or more sets of expansion pairs are used.

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