Heavy-duty anchor

Abstract

The utility model relates to the technical fields of anchor bolt, and disclose a heavy anchor bolt, including screw rod, the one end of screw rod forms hexagonal head or is equipped with hexagon nut, the other end of screw rod is equipped with conical nut, its characterized in that: the grommet, thrust sleeve, plastic sleeve, expansion sleeve are successively sleeved at screw rod, the grommet is close to hexagonal head and sets up, the expansion sleeve is close to conical nut and sets up, the upper edge of thrust sleeve bears against grommet, thrust sleeve is round tubular, the upper edge of plastic sleeve bears against the lower edge of thrust sleeve, the lower edge of plastic sleeve bears against the upper edge of expansion sleeve, and there are a plurality of sharp thorns in annular on the outer wall of plastic sleeve, the lower edge of plastic sleeve forms anti-rotation boss, and the upper edge of expansion sleeve forms the notch that cooperates with anti-rotation boss. Have the following beneficial effects: the plastic sleeve with sharp thorn is additionally arranged, the three-pronged sharp of asymmetric structure can effectively prevent the anchor bolt side rotation, and the nonmetal material of sleeve itself can realize good shock resistance and buffering effect.

Description

Technical Field

[0001] This utility model relates to the technical field of anchor bolts, specifically a heavy-duty anchor bolt, and particularly to its mechanical connection structure. Background Technology

[0002] The prior art document, patent number: 201620165622.4, application date: March 4, 2016, patentee: Shanghai Xiangrui Fastener Co., Ltd., discloses a heavy-duty anchor bolt, which includes a screw rod. The screw rod is characterized by having a conical nut screwed onto one end and a hexagonal nut screwed onto the other end. A high-strength friction plate, a nylon anti-loosening ring, a shear sleeve, a flat washer, and a spring washer sequentially fitted onto the screw rod between the conical nut and the hexagonal nut. The high-strength friction plate is positioned close to the conical nut, and the spring washer is positioned close to the hexagonal nut. The conical nut consists of a truncated cone and a cylindrical part. The constricted end of the truncated cone is located near the high-strength friction plate. The high-strength friction plate is cylindrical in shape. An elongated opening is formed along the axial direction on the side wall of the high-strength friction plate. The top of the elongated opening is located at the opening near the constricted end of the high-strength friction plate, and the bottom of the elongated opening is located on the side wall of the high-strength friction plate. The bottom of the elongated opening is elliptical. A conical step is formed on the outer wall of the nylon anti-loosening ring. Several anti-slip teeth are evenly distributed in a ring on the outer wall of the nylon anti-loosening ring near the end of the high-strength friction plate.

[0003] The high-strength friction plates and shear sleeves used in the existing technology are all metal components. In actual use, the anti-rotation effect is not ideal, and due to the limitations of the materials, the shock resistance and buffering effect are also not ideal. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a heavy-duty anchor bolt, which adds a plastic sleeve with spikes to the existing technology. The spikes with a special triangular structure can effectively prevent the anchor bolt from rotating sideways, and the non-metallic material of the sleeve itself can achieve good shock resistance and cushioning effect, so as to solve the problems mentioned in the background.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a heavy-duty anchor bolt, comprising a screw, one end of which forms a hexagonal head or is provided with a hexagonal nut, and the other end of which is provided with a conical nut, characterized in that: a washer, a thrust sleeve, a plastic sleeve, and an expansion sleeve are sequentially sleeved on the screw, the washer is positioned near the hexagonal head, the expansion sleeve is positioned near the conical nut, the upper edge of the thrust sleeve abuts against the washer, the thrust sleeve is cylindrical, the upper edge of the plastic sleeve abuts against the lower edge of the thrust sleeve, the lower edge of the plastic sleeve abuts against the upper edge of the expansion sleeve, the outer wall of the plastic sleeve has a plurality of spikes arranged in a ring, the lower edge of the plastic sleeve forms an anti-rotation protrusion, and the upper edge of the expansion sleeve forms a groove that mates with the anti-rotation protrusion.

[0008] Compared with the prior art, this utility model provides a heavy-duty anchor bolt with the following advantages: the addition of a plastic sleeve with spikes, the asymmetrical triangular spikes can effectively prevent the anchor bolt from rotating sideways, and the non-metallic material of the sleeve itself can achieve good shock resistance and cushioning effect. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0010] Figure 2 This is a perspective view of the first embodiment of the present utility model;

[0011] Figure 3 This is a schematic diagram of the screw structure of the first embodiment of the present invention;

[0012] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0013] Figure 5 This is a perspective view of the second embodiment of the present utility model;

[0014] Figure 6 This is a schematic diagram of the thrust sleeve structure of this utility model;

[0015] Figure 7 This is a schematic diagram of the plastic sleeve structure of this utility model;

[0016] Figure 8 This is a schematic diagram of the expansion sleeve structure of this utility model;

[0017] Figure 9 This is a schematic diagram of the conical nut structure of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1:

[0020] like Figure 1-3 and Figure 6-9 As shown, this utility model provides a heavy-duty anchor bolt, including a screw 1, one end of which forms a hexagonal head 2, and the other end of which is provided with a conical nut 3. It differs from the prior art in that: a washer 4, a thrust sleeve 5, a plastic sleeve 6, and an expansion sleeve 7 are sequentially sleeved on the screw 1. The washer 4 is positioned close to the hexagonal head 2, and the expansion sleeve 7 is positioned close to the conical nut 3. The upper edge of the thrust sleeve 5 abuts against the washer 4. The thrust sleeve 5 is cylindrical. The upper edge of the plastic sleeve 6 abuts against the lower edge of the thrust sleeve 5, and the lower edge of the plastic sleeve 6 abuts against the upper edge of the expansion sleeve 7. The outer wall of the plastic sleeve 6 has several annular spikes 8. The lower edge of the plastic sleeve 6 forms an anti-rotation protrusion 18, and the upper edge of the expansion sleeve 7 forms a groove 9 that mates with the anti-rotation protrusion 18.

[0021] In specific implementation, an elliptical hole 10 is provided on the tube wall of the expansion sleeve 7, and an elongated opening 11 is provided along the axial direction on the tube wall of the expansion sleeve 7. Each elongated opening 11 corresponds to an elliptical hole 10. The elongated opening 11 extends from the center of the lower edge of the elliptical hole 10 to the lower edge of the expansion sleeve 7.

[0022] In a specific implementation, an elongated gap 12 is provided on the wall of the expansion sleeve 7 along the axial direction. The elongated gap 12 extends from the upper edge of the outer wall of the expansion sleeve 7 to the lower edge of the outer wall of the expansion sleeve 7, and the elongated gap 12 overlaps with one of the elongated openings 11.

[0023] In specific implementation, at least one annular rib 13 is formed on the outer wall of the expansion sleeve 7, preferably three annular ribs 13.

[0024] In specific implementation, the spike 8 is composed of three edges that intersect at a point, which is the tip of the spike 8, and one of the edges is perpendicular to the outer wall of the plastic sleeve 6.

[0025] In a specific implementation, an annular recess 15 is formed on the outer wall of the plastic sleeve 6, and the aforementioned spike 8 is located at the lower part of the annular recess 15. The plastic sleeve 6 can be made of nylon (polyamide) material.

[0026] In a specific implementation, a cross-shaped cut 16 is formed on the end face of one end of the screw 1.

[0027] In practice, the outer wall of the thrust sleeve 5 is provided with a ring-shaped minimum installation depth guide line 17.

[0028] Example 2:

[0029] like Figure 4-9 As shown, this utility model provides a heavy-duty anchor bolt, including a screw 1, one end of which is provided with a hexagonal nut 14, and the other end of which is provided with a conical nut 3. The screw 1 is characterized by having a washer 4, a thrust sleeve 5, a plastic sleeve 6, and an expansion sleeve 7 sequentially fitted onto it. The washer 4 is positioned near the hexagonal head 2, and the expansion sleeve 7 is positioned near the conical nut 3. The upper edge of the thrust sleeve 5 abuts against the washer 4. The thrust sleeve 5 is cylindrical. The upper edge of the plastic sleeve 6 abuts against the lower edge of the thrust sleeve 5, and the lower edge of the plastic sleeve 6 abuts against the upper edge of the expansion sleeve 7. The outer wall of the plastic sleeve 6 has several annular spikes 8. The lower edge of the plastic sleeve 6 forms an anti-rotation protrusion 18, and the upper edge of the expansion sleeve 7 forms a groove 9 that mates with the anti-rotation protrusion 18.

[0030] In specific implementation, an elliptical hole 10 is provided on the tube wall of the expansion sleeve 7, and an elongated opening 11 is provided along the axial direction on the tube wall of the expansion sleeve 7. Each elongated opening 11 corresponds to an elliptical hole 10. The elongated opening 11 extends from the center of the lower edge of the elliptical hole 10 to the lower edge of the expansion sleeve 7.

[0031] In a specific implementation, an elongated gap 12 is provided on the wall of the expansion sleeve 7 along the axial direction. The elongated gap 12 extends from the upper edge of the outer wall of the expansion sleeve 7 to the lower edge of the outer wall of the expansion sleeve 7, and the elongated gap 12 overlaps with one of the elongated openings 11.

[0032] In specific implementation, at least one annular rib 13 is formed on the outer wall of the expansion sleeve 7.

[0033] In a specific implementation, the spike 8 is composed of three edges that intersect at a point, which is the tip of the spike 8. One edge 19 is perpendicular to the outer wall of the plastic sleeve 6. The spike 8 has an asymmetrical structure. In a preferred embodiment, the spike 8 forms at least one plane perpendicular to the outer wall of the plastic sleeve 6 and an obliquely distributed slope.

[0034] In a specific implementation, an annular recess 15 is formed on the outer wall of the plastic sleeve 6, and the aforementioned spike 8 is located at the lower part of the annular recess 15. The plastic sleeve 6 can be made of nylon (polyamide) material.

[0035] In practice, the outer wall of the thrust sleeve 5 is provided with a ring-shaped minimum installation depth guide line 17.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy-duty anchor bolt, comprising a screw (1), one end of which is formed with a hexagonal head (2) or provided with a hexagonal nut (14), and the other end of which is provided with a tapered nut (3), characterized in that: The screw (1) is sequentially fitted with a washer (4), a thrust sleeve (5), a plastic sleeve (6), and an expansion sleeve (7). The washer (4) is located near the hexagonal head (2), and the expansion sleeve (7) is located near the tapered nut (3). The upper edge of the thrust sleeve (5) abuts against the washer (4). The thrust sleeve (5) is cylindrical. The upper edge of the plastic sleeve (6) abuts against the lower edge of the thrust sleeve (5), and the lower edge of the plastic sleeve (6) abuts against the upper edge of the expansion sleeve (7). The outer wall of the plastic sleeve (6) has several spikes (8) arranged in a ring. The lower edge of the plastic sleeve (6) forms an anti-rotation protrusion (18), and the upper edge of the expansion sleeve (7) forms a groove (9) that mates with the anti-rotation protrusion (18).

2. A heavy-duty anchor bolt according to claim 1, characterized in that: The expansion sleeve (7) has an elliptical hole (10) on its wall and an elongated opening (11) along the axial direction on its wall. Each elongated opening (11) corresponds to an elliptical hole (10). The elongated opening (11) extends from the center of the lower edge of the elliptical hole (10) to the lower edge of the expansion sleeve (7).

3. A heavy-duty anchor bolt according to claim 2, characterized in that: The expansion sleeve (7) has an axially oriented elongated gap (12) on its wall. The elongated gap (12) extends from the upper edge of the outer wall of the expansion sleeve (7) to the lower edge of the outer wall of the expansion sleeve (7). The elongated gap (12) overlaps with one of the elongated openings (11) mentioned above.

4. A heavy-duty anchor bolt according to claim 1, characterized in that: At least one annular rib (13) is formed on the outer wall of the expansion sleeve (7).

5. A heavy-duty anchor bolt according to claim 1, characterized in that: The spike (8) consists of three edges, one of which is perpendicular to the outer wall of the plastic sleeve (6).

6. A heavy-duty anchor bolt according to claim 5, characterized in that: An annular recess (15) is formed on the outer wall of the plastic sleeve (6), and the aforementioned spike (8) is located at the lower part of the annular recess (15).

7. A heavy-duty anchor bolt according to claim 1, characterized in that: A cross-shaped cut (16) is formed on the end face of one end of the screw (1).

8. A heavy-duty anchor bolt according to claim 1, characterized in that: The thrust sleeve (5) has a ring-shaped minimum installation depth guide line (17) on its outer wall.

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