High-precision expansion bolt easy to install

Abstract

The utility model discloses a high-precision easy-to-install expansion bolt, which relates to the technical field of expansion bolts, and comprises a screw body, a fixing mechanism and an expansion sleeve, the fixing mechanism is installed inside the screw body, and the expansion sleeve is arranged on the surface of the screw body in a penetrating manner. Through the screw body, the fixing mechanism, the expansion sleeve, the anti-slip strip, the anti-slip head, the expansion head, the stud and the nut, when the expansion bolt is inserted into a pre-drilled hole, the expansion bolt can be pre-fixed through the arrangement of the anti-slip strip, the expansion sleeve is prevented from slipping in the hole during screwing, and the screw body is prevented from moving by screwing the nut; the tail of the expansion sleeve is expanded through the cooperation of the expansion head and the kerf, the resistance is larger and slipping is prevented after the expansion sleeve is expanded through the arrangement of the anti-slip head, when the screw body moves to a proper position, the anti-slip conical block is ejected out under the cooperation of the spring and the limiting plate, the interior of a hole is stably supported and fixed, the expansion bolt is prevented from loosening, and the service life of the expansion bolt is prolonged. And the stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to a high-precision easy-to-install expansion bolt. Background Art

[0002] High-precision expansion bolts are a special threaded connector used to fix pipeline brackets or equipment on walls or columns. When using, you must first use an impact drill to drill a hole of the corresponding size on the fixed body, then install the bolt into the hole, and tighten the nut to expand the bolt, configuration sleeve, mounting piece and fixed body into one.

[0003] However, in the current use of most expansion bolts, when the nut is inserted into the hole and the nut is screwed, there is no anti-slip fixation on the expansion sleeve, which can easily cause the entire expansion bolt to rotate in the hole, and when the expansion sleeve expands, it cannot increase the resistance better, which can easily cause the expansion bolt to loosen and cannot provide stable support in the hole, reducing stability. For this reason, we provide a high-precision easy-to-install expansion bolt to solve the above problems. Utility Model Content

[0004] The utility model aims to make up for the deficiencies of the prior art and provides a high-precision easy-to-install expansion bolt.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision easy-to-install expansion bolt, comprising a screw body, a fixing mechanism and an expansion sleeve, the fixing mechanism being installed inside the screw body, the expansion sleeve being penetrated through the surface of the screw body, the fixing mechanism having a total of four groups, which are symmetrically distributed inside the screw body, the fixing mechanism comprising a fixing cylinder, the fixing cylinder being fixedly connected to the inside of the screw body, a spring being fixedly connected to the inside of the fixing cylinder, the upper end of the spring being fixedly connected to a limiting plate, the upper surface of the limiting plate being fixedly connected to a non-slip conical block, the surface of the expansion sleeve being fixedly connected to an anti-slip strip, the anti-slip strip having a total of four groups, which are symmetrically distributed on the surface of the expansion sleeve, the surface of the expansion sleeve being fixedly connected to an anti-slip head, and the anti-slip heads having a total of multiple groups, which are symmetrically distributed on the surface of the expansion sleeve.

[0006] Furthermore, the expansion sleeve surface is provided with slits, and there are a plurality of groups of slits which are symmetrically distributed on the surface of the expansion sleeve.

[0007] Furthermore, the left end of the screw body is fixedly connected to a fixing column, and the right end of the screw body is fixedly connected to an expansion head.

[0008] Furthermore, a stud is fixedly connected to the left end of the fixing column, and a nut is threadedly connected to the surface of the stud.

[0009] Furthermore, a sliding ring is provided on the surface of the stud, and a ball is movably connected inside the left side of the sliding ring. There are four groups of balls, which are symmetrically distributed inside the left side of the sliding ring.

[0010] Furthermore, an anti-skid ring is provided on the surface of the stud, and an anti-skid protrusion is fixedly connected to the right side of the anti-skid ring. There are a plurality of groups of anti-skid protrusions, which are symmetrically distributed on the right side of the anti-skid ring.

[0011] Compared with the prior art, this high-precision easy-to-install expansion bolt has the following beneficial effects:

[0012] The utility model uses a screw body, a fixing mechanism, an expansion sleeve, an anti-skid strip, an anti-skid head, an expansion head, a stud and a nut. When the expansion bolt is inserted into a pre-drilled hole, the anti-skid strip can be arranged to pre-fix the expansion bolt to prevent the expansion sleeve from slipping in the hole when twisting. The nut is twisted to move the screw body, and the tail of the expansion sleeve is expanded through the cooperation of the expansion head and the slit. The arrangement of the anti-skid head makes the resistance of the expansion sleeve greater after it is stretched open to prevent slipping. When the screw body moves to a suitable position, the anti-skid conical block is pushed out under the cooperation of the spring and the limit plate to stably support and fix the hole, prevent the expansion bolt from loosening, and improve stability.

[0013] The utility model provides a sliding ring, a ball, an anti-skid ring and an anti-skid protrusion. One side of the sliding ring provided with the ball is in contact with the nut, so that the friction of the nut can be reduced when the nut is screwed, making the screwing easier. One side of the anti-skid protrusion provided on the anti-skid ring is in contact with a fixed body during installation, making the screwing of the nut more stable, avoiding the bolt body from slipping inside the expansion sleeve, and improving the overall practicality of the expansion bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional front view structural diagram of the explosion of the utility model;

[0015] Figure 2 It is a three-dimensional front view structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of a partial three-dimensional front view structure of the utility model;

[0017] Figure 4 It is a three-dimensional front view structural schematic diagram of the fixed mechanism of the utility model in section;

[0018] Figure 5 It is a three-dimensional front view structural schematic diagram of the side of the protective ring of the utility model.

[0019] In the figure: 1. screw body; 2. fixing mechanism; 201. fixing cylinder; 202. spring; 203. limit plate; 204. anti-slip conical block; 3. expansion sleeve; 4. anti-slip strip; 5. anti-slip head; 6. slit; 7. fixing column; 8. expansion head; 9. stud; 10. nut; 11. sliding ring; 12. ball; 13. anti-slip ring; 14. anti-slip protrusion. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] The present embodiment provides a high-precision easy-to-install expansion bolt, which is a special threaded connector used to fix a pipeline bracket or equipment on a wall or a column. When the expansion bolt is inserted into a pre-drilled hole, the expansion bolt can be pre-fixed to prevent the expansion sleeve 3 from slipping in the hole when twisting. The expansion sleeve 3 can have greater resistance after being expanded to prevent slipping. When the screw body 1 moves to a suitable position, the hole can be stably supported and fixed to prevent the expansion bolt from loosening, thereby improving stability.

[0022] See also Figures 1 to 5 A high-precision easy-to-install expansion bolt comprises a screw body 1, a fixing mechanism 2 and an expansion sleeve 3. The fixing mechanism 2 is installed inside the screw body 1, and the expansion sleeve 3 is penetrated on the surface of the screw body 1. The fixing mechanism 2 has four groups, which are symmetrically distributed inside the screw body 1. The fixing mechanism 2 comprises a fixing cylinder 201, which is fixedly connected to the inside of the screw body 1. A spring 202 is fixedly connected inside the fixing cylinder 201. The upper end of the spring 202 is fixedly connected to a limiting plate 203. The upper surface of the limiting plate 203 is fixedly connected to an anti-slip conical block 204. The surface of the expansion sleeve 3 is fixedly connected to an anti-slip strip 4. There are four groups of anti-slip strips 4, which are symmetrically distributed on the surface of the expansion sleeve 3. The surface of the expansion sleeve 3 is fixedly connected to an anti-slip head 5. There are multiple groups of anti-slip heads, which are symmetrically distributed on the surface of the expansion sleeve 3.

[0023] When the expansion bolt is inserted into a pre-drilled hole, the anti-slip strip 4 can be set to pre-fix the expansion bolt to prevent the expansion sleeve 3 from slipping in the hole when twisting. After the tail of the expansion sleeve 3 expands, the anti-slip head 5 makes the expansion sleeve 3 have greater resistance after it is opened to prevent slipping. When the screw body 1 moves to a suitable position, the anti-slip conical block 204 is pushed out with the cooperation of the spring 202 and the limit plate 203, and stably supports and fixes the hole, preventing the expansion bolt from loosening and improving stability.

[0024] The expansion sleeve 3 has a plurality of slits 6 on its surface, which are symmetrically distributed on the surface of the expansion sleeve 3 . The left end of the screw body 1 is fixedly connected to a fixing column 7 , and the right end of the screw body 1 is fixedly connected to an expansion head 8 .

[0025] Through the cooperation of the expansion head 8 and the slit 6, the rear end of the expansion sleeve 3 can be expanded so that the expansion sleeve 3 is expanded in the drilled hole.

[0026] The left end of the fixing column 7 is fixedly connected with a stud 9 , and a nut 10 is threadedly connected to the surface of the stud 9 .

[0027] The screw body 1 can be screwed conveniently by the cooperation between the stud 9 and the nut 10 .

[0028] A sliding ring 11 is provided on the surface of the stud 9 , and a ball 12 is movably connected inside the left side of the sliding ring 11 . There are four groups of ball 12 symmetrically distributed inside the left side of the sliding ring 11 .

[0029] The side of the sliding ring 11 on which the ball 12 is arranged fits with the nut 10 , so that the friction of the nut 10 can be reduced when the nut 10 is screwed, making the screwing easier.

[0030] An anti-skid ring 13 is provided on the surface of the stud 9 , and an anti-skid protrusion 14 is fixedly connected to the right side of the anti-skid ring 13 . There are a plurality of groups of anti-skid protrusions 14 symmetrically distributed on the right side of the anti-skid ring 13 .

[0031] The anti-skid ring 13 is provided with a side of the anti-skid protrusion 14 which fits with the fixed body during installation, making it more stable when the nut 10 is screwed, avoiding the bolt body from slipping inside the expansion sleeve 3, and improving the overall practicality of the expansion bolt.

[0032] Working principle: insert the expansion bolt into the pre-drilled hole, the setting of the anti-skid strip 4 can pre-fix the expansion bolt, the anti-skid ring 13 and the sliding ring 11 are successively inserted into the surface of the stud 9, and the nut 10 is turned to move the screw body 1. The expansion head 8 and the slit 6 cooperate to make the tail of the expansion sleeve 3 expand and fix it in the hole. The setting of the anti-skid head 5 makes the expansion sleeve 3 have greater resistance after it is opened. When the screw body 1 moves to a suitable position, the anti-skid conical block 204 is ejected with the cooperation of the spring 202 and the limit plate 203, and stably supports and fixes the hole to prevent the expansion bolt from loosening. One side of the sliding ring 11 with the ball 12 fits with the nut 10, so that the friction of the nut 10 can be reduced when the nut 10 is turned, making the turning easier. The side of the anti-skid ring 13 with the anti-skid protrusion 14 fits with the fixed body during installation, making it more stable when the nut 10 is turned, and preventing the bolt body from slipping inside the expansion sleeve 3.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision easy-to-install expansion bolt, comprising a screw body (1), a fixing mechanism (2) and an expansion sleeve (3), characterized in that: The fixing mechanism (2) is installed inside the screw body (1), and the expansion sleeve (3) is inserted on the surface of the screw body (1). The fixing mechanism (2) has four groups, which are symmetrically distributed inside the screw body (1). The fixing mechanism (2) comprises a fixing cylinder (201), and the fixing cylinder (201) is fixedly connected to the inside of the screw body (1). A spring (202) is fixedly connected inside the fixing cylinder (201), and the upper end of the spring (202) is fixedly connected to a limit plate (203). The upper surface of the limit plate (203) is fixedly connected to an anti-slip conical block (204). The surface of the expansion sleeve (3) is fixedly connected to an anti-slip strip (4). There are four groups of the anti-slip strip (4), which are symmetrically distributed on the surface of the expansion sleeve (3). The surface of the expansion sleeve (3) is fixedly connected to an anti-slip head (5). There are a plurality of groups of the anti-slip heads (5), which are symmetrically distributed on the surface of the expansion sleeve (3).

2. The high-precision easy-to-install expansion bolt according to claim 1, characterized in that: The expansion sleeve (3) is provided with slits (6) on its surface, and there are a plurality of groups of slits (6) which are symmetrically distributed on the surface of the expansion sleeve (3).

3. The high-precision easy-to-install expansion bolt according to claim 1, characterized in that: The left end of the screw body (1) is fixedly connected to a fixing column (7), and the right end of the screw body (1) is fixedly connected to an expansion head (8).

4. The high-precision easy-to-install expansion bolt according to claim 3, characterized in that: The left end of the fixing column (7) is fixedly connected to a stud (9), and a nut (10) is threadedly connected to the surface of the stud (9).

5. The high-precision easy-to-install expansion bolt according to claim 4, characterized in that: A sliding ring (11) is provided on the surface of the stud (9), and a ball bearing (12) is movably connected inside the left side of the sliding ring (11). There are four groups of the ball bearings (12) which are symmetrically distributed inside the left side of the sliding ring (11).

6. The high-precision easy-to-install expansion bolt according to claim 4, characterized in that: An anti-slip ring (13) is provided on the surface of the stud (9), and an anti-slip protrusion (14) is fixedly connected to the right side of the anti-slip ring (13). There are a plurality of groups of anti-slip protrusions (14) which are symmetrically distributed on the right side of the anti-slip ring (13).

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