Expansion bolt

Abstract

The utility model relates to the technical field of bolts, and discloses an expansion bolt which comprises a first sleeve, a second sleeve is connected to the lower portion of the first sleeve, screw rods are arranged in the first sleeve and the second sleeve, a limiting groove is formed in the top of the second sleeve, a limiting groove is fixedly formed in the top of the first sleeve, and the limiting groove is fixedly connected with the first sleeve. The limiting block slides in the limiting groove, a spring is arranged between the first sleeve and the second sleeve, the two ends of the spring are fixedly connected to the lower surface of the first sleeve and the upper surface of the second sleeve correspondingly, and an expansion head is arranged at the bottom of the screw. A detachable nut is arranged on the top of the screw rod, and an internal thread matched with a thread of the screw rod is arranged in the nut. The expansion bolt solves the problem that an object moves due to the fact that an existing expansion bolt is not firmly fixed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt technical field especially, it relates to an expansion bolt. BACKGROUND

[0002] Expansion bolt is a kind of special thread connecting piece, usually by screw rod, expansion pipe, nut and gasket, this bolt utilizes wedge angle to push expansion pipe, to form friction gripping force in concrete structure etc., realize fixed effect, it is applicable to the pipe, support, bracket or equipment fixed on wall, floor or column, expansion bolt has wide application in engineering field, such as bridge, tunnel and municipal building etc., because of its simple, convenient and reliable characteristics, can improve work efficiency and safety, the expansion bolt of prior art is relatively brief when using its expansion means.

[0003] The utility model discloses a kind of expansion bolts, by using external electric drill to drill into wall body with thread outer rod, then thread inner rod, T-shaped rod follow into and punch into wall body, then change drill bit of external electric drill, then after the changed drill bit cooperates with small cross slot, by rotating thread inner rod to make T-shaped rod rotate, then T-shaped rod punches into deeper wall body interior, then big tooth ring, middle tooth ring, small tooth ring are clamped into wall body interior, then cooperate with thread outer rod, form four-layer screwing mode, effectively improve the firmness of this part.But, the device still has some other problems, for example, the bolt will appear large object not firm phenomenon when using, even object position moves due to expansion bolt not firm, to cause security risk. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing an expansion bolt to solve the problems in the above background.

[0005] To achieve the above object, the following technical scheme is provided: an expansion bolt, comprising:

[0006] First sleeve, the lower portion of the first sleeve is connected with second sleeve, the inside of the first sleeve and the second sleeve is provided with screw rod, the top of the second sleeve is provided with limiting slot, the top of the first sleeve is fixedly provided with limiting slot, the limiting block slides with the inside of the limiting slot, spring is arranged between the first sleeve and the second sleeve, the lower surface of the first sleeve and the upper surface of the second sleeve are fixedly connected with the both ends of the spring, the bottom of the screw rod is provided with expansion head, the top of the screw rod is provided with detachable nut, the inside of the nut is provided with internal thread matched with the thread of the screw rod.

[0007] In the technical scheme, further, the top of the first sleeve and the bottom of the second sleeve are provided with a deformation groove.

[0008] In any of the above technical schemes, further, one side of the nut is fixedly provided with an expansion block, the expansion block is provided in a circular truncated cone shape, and the diameter of the side of the expansion block away from the nut is smaller than the diameter of the side of the expansion block close to the nut.

[0009] In any of the above technical schemes, further, a limiting ring is fixedly arranged on the top of the first sleeve.

[0010] In any of the above technical schemes, further, the length of the limiting block is equal to the length of the limiting groove.

[0011] The utility model discloses the beneficial effect is:

[0012] 1. By the fixed setting of the limiting block below the first sleeve, the limiting groove is arranged on the top of the second sleeve, the limiting block is slid and is limited in the inside of the limiting groove, so that the first sleeve and the second sleeve can be connected through the limiting block, after the impact electric drill punches a hole on the wall, the first sleeve and the second sleeve are installed into the inside of the first sleeve and the second sleeve of the finger one end of the screw rod, then the expansion head one end of the second sleeve and the screw rod is inserted into the inside of the hole, then the first sleeve is installed into the inside of the wall hole, the expansion head of the bolt is embedded into the inside of the second sleeve through the nut, so that the deformation groove of the bottom end of the second sleeve is squeezed, the second sleeve is contacted with the outside of the wall hole, when the nut rotates, the limiting block slides to the inside of the limiting groove, the distance between the first sleeve and the second sleeve becomes shorter, the spring is extruded, the spring is deformed, and then the spring is contacted with the wall hole after deformation, the friction force between the first sleeve, the second sleeve and the wall is increased, and the fixation of the bolt becomes more firm. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic diagram of the utility model;

[0014] Figure 2 It is the structure cross section schematic diagram of the utility model;

[0015] Figure 3 It is another angle cross section schematic diagram of the structure of the utility model;

[0016] Mark explanation: 100, the first sleeve;101, limiting block;102, limiting ring;110, second sleeve;111, limiting groove;120, screw rod;121, expansion head;130, spring;140, nut;141, expansion block;150, deformation groove. DETAILED DESCRIPTION

[0017] 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 described. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art are within the scope of the present application.

[0018] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion. The techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0019] Embodiment 1:

[0020] As shown in the Figures 1-3 The present embodiment provides an expansion bolt, comprising:

[0021] A first sleeve 100 is connected with a second sleeve 110 below, the inside of the first sleeve 100 and the second sleeve 110 is provided with a screw rod 120, the top of the second sleeve 110 is provided with a limiting groove 111, the top of the first sleeve 100 is fixedly provided with a limiting groove 111, the limiting block 101 slides with the inside of the limiting groove 111, the spring 130 is arranged between the first sleeve 100 and the second sleeve 110, both ends of the spring 130 are fixedly connected to the lower surface of the first sleeve 100 and the upper surface of the second sleeve 110 respectively, the bottom of the screw rod 120 is provided with an expansion head 121, the top of the screw rod 120 is provided with a detachable nut 140, the inside of the nut 140 is provided with an internal thread matched with the thread of the screw rod 120.

[0022] In the technical scheme, in order to make the expansion bolt more firmly fixed, a plurality of limiting blocks 101 are fixedly arranged at the bottom of the first sleeve 100, a second sleeve 110 is arranged below the first sleeve 100, a limiting groove 111 is formed at the top of the second sleeve 110, the first sleeve 100 is connected with the second sleeve 110 through the limiting blocks 101, the limiting blocks 101 are used in cooperation with the limiting groove 111, a spring 130 is further arranged between the first sleeve 100 and the second sleeve 110, both ends of the spring 130 are fixedly connected to the bottom of the first sleeve 100 and the top of the second sleeve 110 respectively, a screw rod 120 is arranged in the first sleeve 100 and the second sleeve 110, an expansion head 121 is arranged on the side of the screw rod 120 close to the second sleeve 110, and a detachable nut 140 is arranged on the side of the screw rod 120 close to the first sleeve 100, so that after the impact drill punches the mounting hole in the wall body, the straight rod of the screw rod 120 is first inserted into the second sleeve 110 and then inserted into the first sleeve 100, then the expansion head 121 is capable of contacting the bottom of the second sleeve 110, the expansion head 121 and one end of the second sleeve 110 are first installed into the inside of the mounting hole, then the first sleeve 100 is installed into the inside of the mounting hole, then external threads are formed on the side of the screw rod 120 close to the first sleeve 100, and internal threads are arranged in the nut 140 and engaged with the external threads, so that after the second sleeve 110 and the first sleeve 100 are installed into the inside of the wall, the nut 140 is rotated, then the first sleeve 100 is capable of moving towards the second sleeve 110, the limiting blocks 101 are capable of sliding into the inside of the limiting groove 111, so that the distance between the first sleeve 100 and the second sleeve 110 is changed, the spring 130 between the two sleeves is deformed, then the two sides of the spring 130 contact the inner wall of the wall, the friction between the two sleeves and the wall is increased, and the stability of the expansion bolt is improved.

[0023] Embodiment 2

[0024] The embodiment provides an expansion bolt, in addition to the technical scheme of the above-mentioned embodiment, and has the following technical features.

[0025] As shown in Figures 1-3 In the embodiment, a deformation groove 150 is formed at the top of the first sleeve 100 and the bottom of the second sleeve 110.

[0026] In the technical scheme, in order to increase the stability between the bolt and the wall, a plurality of deformation grooves 150 are arranged on the top of the first sleeve 100 and the bottom of the second sleeve 110, so that when the screw rod 120 is contracted by the bolt, the expansion head 121 of the screw rod 120 can be contracted in the second bolt, so that the expansion head 121 can expand the bottom of the second sleeve 110, and the deformation grooves 150 arranged on the bottom of the second sleeve 110 can facilitate the expansion of the second sleeve 110, and the second sleeve 110 on both sides of the deformation grooves 150 can be expanded to contact the inner wall of the wall, so as to increase the friction between the bolt and the wall, and increase the fastening force of the whole bolt.

[0027] Embodiment 3:

[0028] The embodiment provides an expansion bolt, which comprises the technical scheme of the above-mentioned embodiment and has the following technical features.

[0029] As shown in the figure, Figures 1-3 In the embodiment, one side of the nut 140 is fixedly provided with an expansion block 141, the expansion block 141 is in a circular truncated cone type, and the diameter of the side of the expansion block 141 away from the nut 140 is smaller than the diameter of the side of the expansion block 141 close to the nut 140.

[0030] In the technical scheme, in order to facilitate the increase of the stability between the first sleeve 100 and the wall, the expansion block 141 is arranged on one side of the nut 140, the expansion block 141 is in a circular truncated cone type, the diameter of the side of the expansion block 141 close to the nut 140 is greater than the diameter of the side of the expansion block 141 away from the nut 140, and the diameter of the side of the expansion block 141 away from the nut 140 is equal to the diameter of the screw rod 120, and the inside of the expansion block 141 and the nut 140 is provided with a continuous thread, so that when the nut 140 is rotated, the expansion block 141 can be close to one side of the first sleeve 100, and then the expansion block 141 can be squeezed into the inside of the first sleeve 100 after the nut 140 is rotated for a certain time, so that the deformation grooves 150 at the top of the first sleeve 100 can be expanded, and then the side walls on both sides of the deformation grooves 150 of the first sleeve 100 can contact the inner wall of the wall, so that the first sleeve 100 also contacts the wall, the friction between the bolt and the wall is increased, and the stability of the whole device is increased.

[0031] Embodiment 4:

[0032] The embodiment provides an expansion bolt, which comprises the technical scheme of the above-mentioned embodiment and has the following technical features.

[0033] As shown in the figure, Figures 1-3 In the embodiment, the top of the first sleeve 100 is fixedly provided with a limiting ring 102.

[0034] In the technical solution, in order to facilitate the expansion block 141 to be squeezed into the inside of the first sleeve 100, the limiting ring 102 is fixedly connected to the top of the first sleeve 100, so that when the expansion block 141 approaches the first sleeve 100, the bottom end of the expansion block 141 can enter the inside of the first sleeve 100 through the gap between the limiting ring 102 and the screw rod 120, thereby facilitating the expansion block 141 to be installed between the first sleeve 100 and the screw rod 120, and facilitating the deformed groove 150 at the top of the first sleeve 100 to be expanded, thereby increasing the friction between the first sleeve 100 and the wall and the stability of the bolt.

[0035] Embodiment 5:

[0036] The embodiment provides an expansion bolt, in addition to the technical solutions of the above-mentioned embodiments, and has the following technical features.

[0037] As shown in Figure 1 and Figure 2 In the embodiment, the length of the limiting block 101 is equal to the length of the limiting groove 111.

[0038] In the technical solution, in order to facilitate the deformation of the spring 130, the length of the limiting block 101 is set to be equal to the length of the limiting groove 111, so that when the control nut 140 approaches and squeezes the first sleeve 100, the limiting block 101 is inserted into the inside of the limiting groove 111 until the spring 130 is maximally deformed, and the position of the limiting block 101 in the limiting groove 111 is relatively stable, at this time, the top of the first sleeve 100 is expanded by the expansion block 141, so that the first sleeve 100 is fixed in the inside of the wall, at this time, the deformed grooves 150 of the first sleeve 100 and the second sleeve 110 are respectively fixed in the inside of the wall, and at the same time, the spring 130 is deformed in the gap between the first sleeve 100 and the second sleeve 110, thereby being in contact with the inner wall of the wall, increasing the friction between the entire bolt and the wall, and protecting the fastening force of the entire bolt.

[0039] The embodiments of the application are described above in combination with the drawings, and the embodiments and the features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and the person skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, all of which belong to the protection of the application.

Claims

1. An expansion bolt, characterized in that, Include: First sleeve (100), the lower part of the first sleeve (100) is connected with the second sleeve (110), the inside of the first sleeve (100) and the second sleeve (110) is provided with screw rod (120), the top of the second sleeve (110) is provided with limiting groove (111), the top of the first sleeve (100) is fixedly provided with limiting groove (111), the limiting block (101) is slid with the inside of the limiting groove (111), the spring (130) is arranged between the first sleeve (100) and the second sleeve (110), the both ends of the spring (130) are fixedly connected with the lower surface of the first sleeve (100) and the upper surface of the second sleeve (110) respectively, the bottom of the screw rod (120) is provided with expansion head (121), the top of the screw rod (120) is provided with detachable nut (140), the inside of the nut (140) is provided with internal thread matched with the thread of the screw rod (120).

2. An expansion bolt according to claim 1 wherein: The top of the first sleeve (100) and the bottom of the second sleeve (110) are provided with deformation groove (150).

3. An expansion bolt according to claim 1 wherein: One side of the nut (140) is fixedly provided with expansion block (141), the expansion block (141) is provided in circular truncated cone type, and the diameter of the side of the expansion block (141) away from the nut (140) is less than the side of the expansion block (141) close to the nut (140).

4. An expansion bolt according to claim 1 wherein: The top of the first sleeve (100) is fixedly provided with limiting ring (102).

5. An expansion bolt according to claim 1 wherein: The length of the limiting block (101) is equal to the length of the limiting groove (111).

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