Expansion bolt convenient to disassemble

Abstract

The invention discloses an expansion bolt convenient to disassemble. Hinged plates are propped through connecting rods, so that a circumferential surface formed by the multiple hinged plates in a matched mode is unfolded to prop a casing pipe; and the casing pipe deforms and is clamped in a mounting hole, then the circumferential surface retracts and is separated from the interior of the casing pipe, and the casing pipe is reserved in the mounting hole, so that the disassembling difficulty is reduced. The expansion bolt adjustable in taper is characterized in that a first threaded rod is of an internal hollow structure, a connecting sleeve is arranged in the first threaded rod and located at one end of the first threaded rod, a plurality of second through grooves are formed in the other end of the first threaded rod in the circumferential direction, a plurality of extending parts are formed at the other end of the first threaded rod, the extending parts and the second through grooves are distributed at intervals, the hinge plates are hinged to the extending parts through hinge shafts, and the multiple hinge plates are matched to form the circumferential surface.

Description

technical field [0001] The invention relates to an expansion bolt that is easy to disassemble, relates to an expansion bolt that can be easily disassembled, and belongs to the field of hardware appliances. In particular, it relates to a hinged plate supported by a connecting rod, so that the circumferential surface formed by the cooperation of multiple hinged plates expands to support the sleeve, the sleeve deforms and fits in the installation hole, and then the circumferential surface retracts to release the sleeve from the sleeve. The inside of the tube is detached, and the sleeve is left inside the installation hole to reduce the difficulty of disassembly, and the expansion bolt can adjust the taper. Background technique [0002] At present, in the field of housing construction, expansion screws are widely used in various construction occasions due to their small drilling, large pulling force, and flat exposure after use. If they are not used, they can be removed at will ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of housing construction, expansion screws are widely used in various construction occasions due to their small drilling, large pulling force, and flat exposure after use. If they are not used, they can be removed at will and keep the wall flat. Some expansion screws, when in use, use the taper at one end of the screw to spread the expansion sleeve with a cutout on the outside to the inner wall of the hole, which has the effect of fixing the screw, because the expansion sleeve is deformed, When disassembling the expansion screw, you need to use a tool such as pliers to pull the screw out. The disassembly process is troublesome, and the screw has a certain taper at one end. Therefore, when removing the expansion screw, you need to take out the screw and the sleeve together. The taper of the front head of the screw corresponds to the deformed shape of the sleeve when the expansion bolt is taken out, and it is easy to make the taper of the screw engage with the sleeve. When the expansion bolt is taken out, the taper of the screw exerts force on the sleeve, allowing the sleeve to engage with the wall It is more firm, so that it is easy for the staff to cause damage to the wall when taking the expansion screws, which will affect the aesthetics of the wall

[0003] The notification number CN206386359U discloses a convenient dismountable expansion screw, including a bolt and a sleeve. The upper end of the bolt is provided with a screw thread, and the lower end is provided with an expansion head. The beam ring is arranged above the expansion head, a bracket is provided between the beam ring and the bolt, the beam ring is fixed on the bolt through the bracket, and a plurality of notches are provided at the lower end of the sleeve, forming a Several expansion sheets, the bracket passes through the notch, the upper end of the sleeve is provided with a baffle, and the baffle is fixed on the sleeve. The purpose of disassembly, but when disassembling, the beam ring is easy to be clamped in the groove between the expansion pieces, and when the beam ring moves inward, it is easy to drive the expansion piece to move inward together, thereby increasing the difficulty of disassembly, and the installation bolts There is a certain taper at one end, and the bolt cannot be pulled out directly from the casing, which increases the difficulty of disassembly

[0004] The notification number CN206468638U discloses an easy-to-remove expansion screw, including a screw, a sleeve and a force ring, a screw is arranged in the sleeve, a force ring is arranged between the top of the sleeve and the screw, and the force ring There is a gasket at the bottom of the sleeve, and a barb on the top periphery of the sleeve. The lifting ring is connected to the sleeve through the barb. During the process, the sleeve is easy to move to the inside of the wall driven by the screw, which increases the difficulty of disassembly, and the bottom of the screw has a certain taper. During disassembly, the screw and the sleeve need to be disassembled together, and the screw of the expansion bolt cannot be taken out separately, increasing the The difficulty of disassembly by the staff

Images