CN210531362U

CN210531362U - Expansion nut with stable structure reinforced by special-shaped body

Info

Publication number: CN210531362U
Application number: CN201921584063.0U
Authority: CN
Inventors: 叶伟峰
Original assignee: Wuhu Zhaohe Auto Parts Technology Co Ltd
Current assignee: Wuhu Zhaohe Auto Parts Technology Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-15
Anticipated expiration: 2029-09-23

Abstract

The utility model provides an utilize body dysmorphism additional strengthening stable expansion nut of structure, including the expansion nut body, the expansion nut body is including expand tube and countersunk head bolt, countersunk head bolt alternate in the inside of expand tube is swing joint, the equipartition is equipped with four open slots, and is a plurality of on the one end body of expand tube the open slot with the body of expand tube constitutes four expansion duct pieces, every all be equipped with a plurality of triangle lugs on the surface of expansion duct piece, the expand tube is kept away from a plurality of the one end of open slot is cast and is welded the flat pad of mouth of pipe, the flat pad of mouth of pipe is close to a plurality of on the one end outer wall of open slot the equipartition cast and weld four triangle fixed strips, countersunk head bolt is close to a plurality of the one end of open slot is equipped with interior expansion head. The utility model discloses an expansion bolts has increased the stability when installing in the wall body through the multiple special-shaped project organization of self for self can not be easy cause not hard up.

Description

Expansion nut with stable structure reinforced by special-shaped body

Technical Field

The utility model mainly relates to an expansion bolts's technical field, concretely relates to utilize body dysmorphism additional strengthening stable expansion nut.

Background

The expansion bolt is a special screw connector for fixing pipeline branch/hanger/bracket or equipment on wall, floor and column, and is divided into carbon steel bolt and stainless steel bolt, and the grade of carbon steel bolt is divided into more than 10 grades, such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9 and 12.9, etc. The numbers before and after the decimal point represent the nominal tensile strength and yield ratio of the bolt material, respectively, such as: the 8.8 grade bolt indicates that the tensile strength of the material reaches 800MPa, the yield ratio is 0.8, i.e. the yield strength reaches 800x0.8=640MPa, while the stainless steel bolts are rated 45, 50, 60, 70, 80, the material is mainly austenite a1, a2, a4, martensite and ferrite C1, C2, C4, which indicates methods such as a2-70, and before and after "-" respectively indicates the bolt material and the strength grade.

When the expansion bolt is used, firstly, a hole with a corresponding size is drilled on the fixed body by using an impact electric drill (hammer), then the bolt and the expansion pipe are arranged in the hole, and the bolt, the expansion pipe, the mounting piece and the fixed body can be expanded into a whole by screwing the nut.

However, the existing expansion bolt is loose inside due to insufficient wall hardness in the installation process, so that the gripping force of the expansion bolt is greatly reduced, equipment or a frame is easy to lose support and fall, and the expansion bolt is very dangerous.

Therefore, it is necessary to design a special-shaped structure design for increasing the stability of the expansion bolt in the wall body, so that the expansion bolt cannot be easily loosened.

SUMMERY OF THE UTILITY MODEL

The utility model mainly provides an expansion nut with stable special-shaped reinforcing structure for solve the technical problem provided in the above background art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the expansion nut with the stable structure is reinforced by utilizing the special shape of the body and comprises an expansion nut body, wherein the expansion nut body comprises an expansion pipe and a countersunk head bolt, and the countersunk head bolt is inserted into the expansion pipe and movably connected with the expansion pipe;

the pipe body at one end of the expansion pipe is provided with four open slots in an equal division manner, the open slots and the pipe body of the expansion pipe form four expansion pipe pieces, the outer surface of each expansion pipe piece is provided with a plurality of triangular lugs, and the triangular lugs on each expansion pipe piece are sequentially arranged in a straight shape;

a pipe orifice flat pad is cast-welded at one end of the expansion pipe, which is far away from the open slots, four triangular fixing strips are cast-welded on the outer wall of the pipe orifice flat pad, which is close to the outer walls of the open slots, in an equal-dividing manner, and the triangular fixing strips extend to the joint of each expansion pipe piece along the outer wall of the expansion pipe one by one and correspond to the triangular convex blocks on each expansion pipe piece;

an inner expansion head is arranged at one end of the countersunk head bolt, the section of the inner expansion head is trapezoidal, the inner expansion head is positioned at the opening ends of the open grooves, and the maximum diameter of the inner expansion head is larger than the diameter of the inner pipe wall of the expansion pipe.

Furthermore, conical positioning heads are arranged at intervals of the triangular fixing strips in an equal division mode, and the large head ends of the conical positioning heads are connected with the outer wall of the pipe orifice flat pad in a cast-weld mode.

Furthermore, a plurality of oblique strip convex blocks are arranged on the surface of one end, away from the triangular fixing strips, of the pipe orifice flat pad one by one around the axis.

Further, the symmetry is embedded to have reverse stationary blade, two on the outer wall of expand tube reverse stationary blade is located the interlude of expand tube, and two reverse stationary blade is close to a plurality of the one end of open slot with the expand tube body is connected.

Furthermore, one end, far away from the junction, of the inner wall of the two reverse fixing pieces is connected with a hook body, and the openings of the two hook bodies face the inner expansion head.

Further, the countersunk head bolt is kept away from be equipped with the external screw thread section on the one end outer wall of internal expansion head, the external screw thread section runs through the flat pad of mouth of pipe extends to the outside of expand tube loops through the screw-thread engagement and is connected with first hexagon nut and second hexagon nut, just first hexagon nut with be equipped with the spring gasket between the flat pad of mouth of pipe, the spring gasket cover is located the external periphery of external screw thread section.

Furthermore, a convex ring is cast-welded on the outer wall of the middle section of the countersunk head bolt around the axis, the diameters of the surfaces of the two ends of the convex ring are different, the outer surface of one end with the large diameter of the convex ring is connected with the two hook bodies, and the connection mode is contact but not fixed.

Compared with the prior art, the beneficial effects of the utility model are that:

the expansion bolt of the utility model has the structural design of high stability and better lifting and gripping force, when the expansion bolt is installed, the expansion bolt can utilize the inner expansion head to extrude four expansion pipe pieces to expand outwards in the face of different expansion objects to form a horn mouth, meanwhile, a plurality of triangular lugs which are arranged in line in sequence on each expansion pipe piece are used for lifting and gripping force, and friction force is increased, four triangular fixing strips which are arranged on the outer wall of the expansion pipe in equal parts play the role of reinforcing ribs, thus preventing the front end of the expansion pipe from being easily deformed, strengthening the bearing capacity of the expansion pipe, a plurality of triangular lugs which are matched with the rear end of the expansion pipe to prevent the expansion bolt from rotating together, and the expansion bolt can not be sunk into the inside of a hole with slightly larger aperture by virtue of the pipe orifice flat cushion to influence installation, and simultaneously match by utilizing various special-shaped design structures, thereby improving the stability of the whole structure of the expansion bolt.

The present invention will be explained in detail with reference to the drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view of the internal structure of the expanding tube of the present invention;

fig. 3 is a schematic view of the structure of the slanted bar bump on the pipe orifice flat pad of the present invention.

In the figure: 1. an expansion nut body; 11. expanding the tube; 111. a pipe orifice flat gasket; 111a, a conical positioning head; 111b, oblique strip convex blocks; 112. a reverse fixing sheet; 112a, a hook body; 113. a triangular fixing strip; 114. expanding the duct piece; 115. an open slot; 116. a triangular bump; 12. a countersunk bolt; 121. an inner expansion head; 122. a convex ring; 123. an external threaded section; 13. a first hexagonal nut; 14. a second hexagonal nut; 15. a spring washer.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings, in which several embodiments of the present invention are shown, but the present invention can be implemented in different forms, and is not limited to the embodiments described in the text, but rather, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of the term knowledge in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1, the expansion nut with stable structure reinforced by the special shape of the body comprises an expansion nut body 1, wherein the expansion nut body 1 comprises an expansion pipe 11 and a countersunk head bolt 12, and the countersunk head bolt 12 is inserted into the expansion pipe 11 and movably connected with the expansion pipe; four open grooves 115 are equally arranged on the tube body at one end of the expansion tube 11, a plurality of open grooves 115 and the tube body of the expansion tube 11 form four expansion tube pieces 114, a triangular lug 116 is arranged on the outer surface of each expansion tube piece 114, a plurality of triangular lugs 116 are arranged, and the triangular lugs 116 on each expansion tube piece 114 are sequentially arranged in a straight line shape; a pipe orifice flat gasket 111 is cast-welded at one end of the expansion pipe 11, which is far away from the plurality of open grooves 115, four triangular fixing strips 113 are cast-welded on the outer wall of the pipe orifice flat gasket 111, which is close to the outer wall of one end of the plurality of open grooves 115, in an equally-divided manner, and the plurality of triangular fixing strips 113 extend to the joint of each expansion pipe piece 114 along the outer wall of the expansion pipe 11 one by one and correspond to the plurality of triangular lugs 116 on each expansion pipe piece 114; an inner expansion head 121 is arranged at one end of the countersunk head bolt 12, the cross section of the inner expansion head 121 is trapezoidal, the inner expansion head 121 is positioned at the open ends of the plurality of open grooves 115, and the maximum diameter of the inner expansion head 121 is larger than the diameter of the inner pipe wall of the expansion pipe 11.

Referring to fig. 1 again, conical positioning heads 111a are equally arranged in the intervals of the plurality of triangular fixing strips 113, and the large head ends of the plurality of conical positioning heads 111a are connected with the outer wall of the pipe orifice flat pad 111 in a cast-weld manner. In this embodiment, the plurality of conical positioning heads 111a and the nozzle flat pad 111 are connected by cast welding, so that the nozzle flat pad 111 can be inserted into the wall surface with the help of the plurality of conical positioning heads 111a when contacting the wall, and the expansion pipe 11 is stabilized and prevented from rotating.

Please refer to fig. 2 again, reverse fixing pieces 112 are symmetrically embedded in the outer wall of the expansion pipe 11, the two reverse fixing pieces 112 are located in the middle section of the expansion pipe 11, and one ends of the two reverse fixing pieces 112 close to the plurality of open slots 115 are connected to the pipe body of the expansion pipe 11; one ends of the inner walls of the two reverse fixing pieces 112, which are far away from the connection position, are connected with hook bodies 112a, and the openings of the two hook bodies 112a face the inner expansion head 121; a convex ring 122 is cast-welded around the axis on the outer wall of the middle section of the countersunk head bolt 12, the diameters of the two end surfaces of the convex ring 122 are different, the outer surface of one end with the large diameter of the convex ring 122 is connected with the two hook bodies 112a, and the connection mode is contact but not fixed. In this embodiment, through the contact connection between the convex ring 122 and the two hooks 112a, when the countersunk head bolt 12 is fastened and rotated, the convex ring 122 can push the two hooks 112a to displace together, so that one ends of the two opposite fixing pieces 112 tilt up to form an opposite gripping force on the wall, and particularly when the aperture is slightly larger, the contact between the expanding tube 11 and the inside of the wall is increased, thereby playing a better role in stability.

Please refer to fig. 1-3, the end surface of the nozzle flat gasket 111 away from the plurality of triangular fixing strips 113 is provided with a plurality of slanted strip protruding blocks 111b one by one around the axis; countersunk head bolt 12 is kept away from be equipped with external screw thread section 123 on the one end outer wall of internal expansion head 121, external screw thread section 123 runs through pipe orifice flat pad 111 extends to the outside of expand tube 11 loops through threaded engagement and is connected with first hexagon nut 13 and second hexagon nut 14, just first hexagon nut 13 with be equipped with spring washer 15 between the pipe orifice flat pad 111, spring washer 15 cover is located the periphery of external screw thread section 123. In the present embodiment, the friction force of the contact area is increased by the design of the plurality of slanted bar protrusions 111b, so that the first hexagonal nut 13 cannot be easily loosened after forming a tight connection with the nozzle flat pad 111 by the spring washer 15 when being screwed on the external thread section 123, and the second hexagonal nut 14 is used for fixing an object and pressing the object on the first hexagonal nut 13 to form a fastening connection.

The utility model discloses a concrete operation as follows:

firstly, a hole matched with the wall body is punched by using a punching tool, then one end of an inner expansion head 121 of an expansion nut body 1 is plugged into the hole and extends to the position that a pipe orifice flat pad 111 is positioned at the periphery of the hole, then a first hexagon nut 13 is screwed on an external thread section 123, a spring gasket 15 is extruded on a plurality of inclined strip convex blocks 111b of the pipe orifice flat pad 111, at the moment, a countersunk head bolt 12 rotates reversely and protrudes outwards, the inner expansion head 121 is pulled to be extruded into the interior of four expansion pipe pieces 114 to expand the expansion pipe pieces outwards, a plurality of triangular convex blocks 116 are further embedded and connected with the wall body, a convex ring 122 also supports two hook bodies 112a to displace together, one end of two reverse fixing pieces 112 is tilted to form reverse grabbing force to the wall body, a plurality of conical positioning heads 111a on the pipe orifice flat pad 111 are sunk into the wall body at the periphery of the hole to form fixation, after the process is finished, the screw hole of the object is sleeved on the external thread section 123, then the second hexagon nut 14 is screwed to extrude the object on the first hexagon nut 13, and in the supporting process, the expanding tube 11 forms better toughness by means of the four triangular fixing strips 113, so that the stable support of the countersunk head bolt 12 is enhanced.

The above description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the method and the technical solution of the present invention are not substantially improved or directly applied to other occasions without improvement, and are all within the protection scope of the present invention.

Claims

1. The expansion nut with the stable structure is reinforced by the aid of the special-shaped body and comprises an expansion nut body (1), and is characterized in that the expansion nut body (1) comprises an expansion pipe (11) and a countersunk head bolt (12), and the countersunk head bolt (12) is inserted into the expansion pipe (11) and movably connected with the expansion pipe;

four open grooves (115) are equidistantly formed in a tube body at one end of the expansion tube (11), the open grooves (115) and the tube body of the expansion tube (11) form four expansion tube pieces (114), a triangular bump (116) is arranged on the outer surface of each expansion tube piece (114), a plurality of triangular bumps (116) are formed in each triangular bump (116), and the triangular bumps (116) on each expansion tube piece (114) are sequentially arranged in a straight shape;

a pipe orifice flat cushion (111) is cast-welded at one end, far away from the open grooves (115), of the expansion pipe (11), four triangular fixing strips (113) are cast-welded on the outer wall of one end, close to the open grooves (115), of the pipe orifice flat cushion (111) in an equant manner, the triangular fixing strips (113) extend to the joint of each expansion pipe piece (114) along the outer wall of the expansion pipe (11) one by one and correspond to the triangular lugs (116) on each expansion pipe piece (114);

an inner expansion head (121) is arranged at one end of the countersunk head bolt (12), the section of the inner expansion head (121) is trapezoidal, the inner expansion head (121) is positioned at the opening ends of the open grooves (115), and the maximum diameter of the inner expansion head (121) is larger than the diameter of the inner pipe wall of the expansion pipe (11).

2. The expansion nut stabilized by the body profile reinforcement structure as claimed in claim 1, wherein conical positioning heads (111 a) are equally spaced in intervals of a plurality of said triangular fixing strips (113), and the large ends of a plurality of said conical positioning heads (111 a) are connected with the outer wall of said nozzle flat gasket (111) by cast welding.

3. The expansion nut stabilized by a body profile reinforcement structure according to claim 1, wherein a plurality of slanted bar protruding blocks (111 b) are provided on one end surface of the nozzle flat pad (111) away from the plurality of triangular fixing bars (113) one by one around the axis.

4. The expansion nut stabilized by the body profile reinforcement structure as claimed in claim 1, wherein reverse fixing pieces (112) are symmetrically embedded in the outer wall of the expansion pipe (11), two reverse fixing pieces (112) are located in the middle section of the expansion pipe (11), and one end of each of the two reverse fixing pieces (112) close to the plurality of open grooves (115) is connected with the pipe body of the expansion pipe (11).

5. The expansion nut stabilized by a body profile reinforcement structure as claimed in claim 4, wherein a hook body (112 a) is connected to an end of an inner wall of the two reverse fixing pieces (112) far from the connection, and an opening of the two hook bodies (112 a) faces the inner expansion head (121).

6. The expansion nut with the body profile reinforcing structure for stabilization according to claim 1, wherein an external thread section (123) is arranged on an outer wall of one end of the countersunk head bolt (12) far away from the internal expansion head (121), the external thread section (123) penetrates through the pipe orifice flat gasket (111) and extends to the outside of the expansion pipe (11) to be sequentially connected with a first hexagonal nut (13) and a second hexagonal nut (14) in a threaded engagement manner, a spring gasket (15) is arranged between the first hexagonal nut (13) and the pipe orifice flat gasket (111), and the spring gasket (15) is sleeved on the outer periphery of the external thread section (123).

7. The expansion nut stabilized by the body profile reinforcement structure as claimed in claim 5, wherein a protruding ring (122) is cast-welded around the axis on the outer wall of the middle section of the countersunk head bolt (12), the diameters of the two end surfaces of the protruding ring (122) are different, and the outer surface of the end with the larger diameter of the protruding ring (122) is connected with the two hooks (112 a) in a contact but unfixed manner.