Detachable expansion bolt

Abstract

The utility model belongs to the technical field of expansion bolts, and particularly relates to a detachable expansion bolt which comprises a threaded rod. The outer surface wall of the threaded rod is in threaded connection with an expansion sleeve; the internal threads are arranged on the inner surface wall of the expansion sleeve, when the expansion sleeve needs to be taken out of the mounting hole by arranging the internal threads matched with the threaded rod during working, the flange nut is loosened firstly, then the screw rod is rotated, and the threaded rod on the screw rod is in threaded connection with the internal threads on the expansion sleeve, so that when the screw rod is pulled out of the mounting hole, the expansion sleeve can be taken out from the mounting hole. In addition, an expansion block with the diameter larger than that of the mounting hole is arranged on the outer wall of the lower portion of the expansion sleeve, and after the expansion sleeve is placed into the mounting hole, the expansion block and the mounting hole can form pre-tightening, so that when the flange nut is screwed, the expansion sleeve cannot rotate and slip in the mounting hole, and the expansion sleeve is prevented from rotating and slipping in the mounting hole. The flange nut can be conveniently and quickly screwed, and the mounting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of expansion bolts, and particularly relates to a detachable expansion bolt. BACKGROUND

[0002] In the field of construction, expansion bolts are commonly used for fixing exterior wall decorative plates, stone materials, advertising signs and the like, as well as for fixing floor grooving, connecting load-bearing steel structures and foot bolts of large equipment, and they can bear relatively large tension and pressure to ensure the stability and safety of building structures.

[0003] At present, in the prior art, when an expansion bolt is used, the expansion sleeve is usually inserted into the mounting hole, and then the screw is screwed into the expansion sleeve to force the expansion sleeve to expand and deform in the mounting hole, so that the fixing purpose is achieved.

[0004] In the prior art, when the expansion bolt is used, the outer diameter of the expansion sleeve is smaller than the mounting hole, and when the screw is screwed into the expansion sleeve, the expansion sleeve will rotate and slip in the mounting hole, so that the screw cannot be quickly screwed, and the installation efficiency is reduced. In addition, since the expansion sleeve expands in the mounting hole and does not protrude outside the mounting hole, the expansion bolt can only be forcibly pulled out when it is taken out, which often causes damage to the mounting hole of the fixed object, and the expansion bolt taken out forcibly will be deformed and cannot be reused. Therefore, a detachable expansion bolt is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art, the utility model provides a detachable expansion bolt.

[0006] The utility model solves the technical problems thereof by adopting the technical scheme that the utility model discloses a detachable expansion bolt, which comprises a threaded rod, the outer surface wall of the threaded rod is threadedly connected with an expansion sleeve, the inner surface wall of the expansion sleeve is provided with an internal thread, the outer surface wall of the expansion sleeve is fixedly connected with a rotation auxiliary block, one end of the expansion sleeve is fixedly connected with an expansion block, the side surface of the expansion block is fixedly connected with a conical head, the expansion sleeve is provided with a first preset groove through the expansion block and the conical head, the first preset groove can be hexagonal, quadrangular, octagonal or internally hexagonal, the side surface of the conical head is provided with an internal chamfer, and one end of the threaded rod is fixedly connected with a smooth rod.

[0007] Preferably, one end of the smooth rod is fixedly connected with a conical end, and the material of the conical end is stainless steel or carbon steel.

[0008] Preferably, the outer surface wall of the threaded rod is threadedly connected with a hexagonal nut, and the material of the hexagonal nut is stainless steel or carbon steel.

[0009] Preferably, the bottom of the hexagonal nut is fixedly connected with a limiting sheet; the limiting sheet is made of stainless steel or carbon steel.

[0010] The utility model discloses beneficial effect:

[0011] The utility model provides a detachable expansion bolt, through set up with the internal thread of screw rod cooperation, need to take out expansion sleeve from installation hole, first loosen flange nut, then rotate screw rod, make the threaded rod on screw rod and the internal thread of expansion sleeve on the threaded connection, like this can take out screw rod from installation hole simultaneously, take out expansion sleeve from installation hole, reach the purpose of reuse, in addition, the lower outer wall of expansion sleeve is provided with expansion block greater than the diameter of installation hole, after putting expansion sleeve into installation hole, expansion block will form pre -tightening with installation hole, therefore, when tightening flange nut, expansion sleeve will not rotate slip in installation hole, convenient quick screwing flange nut, improved installation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0012] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the present application and serve to explain the present application together with the specification:.

[0013] In the drawings:

[0014] Figure 1 It is the overall perspective view of the utility model;

[0015] Figure 2 It is the perspective view of built-in thread in the utility model;

[0016] Figure 3 It is the perspective view of expansion block in the utility model;

[0017] Figure 4 It is the perspective view of tapered end in the utility model.

[0018] Legend:

[0019] 1, threaded rod; 2, tapered end; 3, light pole; 4, hexagonal nut; 5, limiting sheet; 6, expansion sleeve; 7, rotation auxiliary block; 8, built-in thread; 9, expansion block; 10, first preset slot; 11, tapered head; 12, built-in chamfer. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0021] The specific embodiments are given below.

[0022] Please refer to Figures 1-4 The present application provides a detachable expansion bolt, which comprises a threaded rod 1; the outer wall of the threaded rod 1 is threadedly connected with an expansion sleeve 6; the inner wall of the expansion sleeve 6 is provided with an internal thread 8; the outer wall of the expansion sleeve 6 is fixedly connected with a rotation auxiliary block 7; one end of the expansion sleeve 6 is fixedly connected with an expansion block 9; the side surface of the expansion block 9 is fixedly connected with a conical head 11; the expansion sleeve 6 is provided with a first preset groove 10 through the expansion block 9 and the conical head 11; the first preset groove 10 can be externally hexagonal, externally quadrangular, externally octagonal or internally hexagonal; the side surface of the conical head 11 is provided with an internal chamfer 12; one end of the threaded rod 1 is fixedly connected with a smooth rod 3; one end of the smooth rod 3 is fixedly connected with a conical end 2; the material of the conical end 2 is stainless steel or carbon steel; the outer wall of the threaded rod 1 is threadedly connected with a hexagonal nut 4; the material of the hexagonal nut 4 is stainless steel or carbon steel; the bottom of the hexagonal nut 4 is fixedly connected with a limiting sheet 5; the material of the limiting sheet 5 is stainless steel or carbon steel; during work, firstly, a mounting hole is drilled at a mounting position, and the diameter of the mounting hole is ensured to be greater than the diameter of the expansion sleeve 6 and less than the diameter of the expansion block 9, then the expansion sleeve 6 is passed through the threaded rod 1 until the expansion sleeve 6 is moved from the threaded rod 1 to the smooth rod 3 and is in sliding cooperation with the smooth rod 3; at this time, the hexagonal nut 4 is threadedly connected with the threaded rod 1, then the expansion sleeve 6 is gently pressed into the mounting hole and the hexagonal nut 4 is in contact with the mounting hole, and then a screw wrench is used to rotate and tighten the threaded rod 1. During the process of tightening the threaded rod 1, the threaded rod 1 is subjected to an outward pulling force, so that the conical end 2 on the threaded rod 1 enters the expansion sleeve 6, and then the expansion sleeve 6 is expanded in the mounting hole, so as to achieve the purpose of fixation.

[0023] Since the internal thread 8 matched with the threaded rod 1 is arranged on the upper portion of the expansion sleeve 6, when the expansion sleeve 6 needs to be taken out from the mounting hole, firstly, the threaded rod 1 is reversely rotated by using a hexagonal wrench or an internal hexagonal wrench, if the threaded rod 1 is not rotated, the hexagonal nut 4 can be loosened by using the wrench, so that the threaded rod 1 is threadedly connected with the internal thread 8 on the expansion sleeve 6, so that the threaded rod 1 can be pulled out from the mounting hole, and the expansion sleeve 6 can be taken out from the mounting hole at the same time.

[0024] Working principle: first, drill the installation hole in the installation position, and ensure that the diameter of the installation hole is greater than the diameter of the expansion sleeve 6 and less than the diameter of the expansion block 9, then pass the expansion sleeve 6 through the threaded rod 1, until the expansion sleeve 6 is moved to the light pole 3 by the threaded rod 1, and is in sliding fit with the light pole 3; At this time, the hexagonal nut 4 is threadedly connected with the threaded rod 1, then the expansion sleeve 6 is gently pressed into the installation hole and the hexagonal nut 4 is in contact with the installation hole, then the screw wrench is rotated and tightened the threaded rod 1. In the process of tightening the threaded rod 1, the threaded rod 1 is subjected to the outward pulling force, so that the tapered end 2 on the threaded rod 1 enters the expansion sleeve 6, and then the expansion sleeve 6 is expanded in the installation hole, so as to achieve the purpose of fixation. Since the built-in thread 8 cooperating with the threaded rod 1 is arranged at the upper part of the expansion sleeve 6, when the expansion sleeve 6 needs to be taken out of the installation hole, first, the screw wrench is used to rotate the threaded rod 1 in the opposite direction, if it does not rotate, the wrench can be used to loosen the hexagonal nut 4, so that the threaded rod 1 is threadedly connected with the built-in thread 8 on the expansion sleeve 6, so that the threaded rod 1 can be pulled out of the installation hole, and the expansion sleeve 6 is taken out of the installation hole at the same time.

[0025] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model.

Claims

1. A detachable expansion bolt comprising a threaded shank (1); characterized in that: The outer wall of the threaded rod (1) is threadedly connected with an expansion sleeve (6); the inner wall of the expansion sleeve (6) is provided with an internal thread (8); the outer wall of the expansion sleeve (6) is fixedly connected with a rotation auxiliary block (7); one end of the expansion sleeve (6) is fixedly connected with an expansion block (9); the side of the expansion block (9) is fixedly connected with a conical head (11); the expansion sleeve (6) is provided with a first preset slot (10) through the expansion block (9) and the conical head (11); the first preset slot (10) can be hexagonal, quadrangular, octagonal or hexagonal; the side of the conical head (11) is provided with an internal chamfer (12), and one end of the threaded rod (1) is fixedly connected with a polished rod (3).

2. A removable expansion bolt as claimed in claim 1 wherein: One end of the polished rod (3) is fixedly connected with a conical end (2), and the material of the conical end (2) is stainless steel or carbon steel.

3. A removable expansion bolt as claimed in claim 1 wherein: The outer wall of the threaded rod (1) is threadedly connected with a hexagon nut (4); the material of the hexagon nut (4) is stainless steel or carbon steel.

4. A removable expansion bolt as claimed in claim 3 wherein: The bottom of the hexagon nut (4) is fixedly connected with a limiting sheet (5); the material of the limiting sheet (5) is stainless steel or carbon steel.

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