CN220151684U - Firm type lower margin expansion nut - Google Patents

Abstract

The utility model relates to the technical field of expansion nuts, in particular to a firm foundation expansion nut. The technical scheme adopted by the utility model is as follows: including the nut main part spliced pole of being made and the center pin is the upper and lower direction by metal material, the upper end central point of nut main part spliced pole puts and is equipped with the central cooperation connecting hole that runs through whole lower extreme, and the upper end position of central cooperation connecting hole is equipped with the fastening connection screw hole, and the length of fastening connection screw hole upper and lower direction is less than half of nut main part spliced pole upper and lower direction length, and the outer cylinder of nut main part spliced pole is equipped with circumference evenly distributed and with the convenient open slot of inflation that the nut main part spliced pole lower extreme runs through completely near lower extreme position. The utility model has the advantages that: the safety in the later use process is higher, and its overall structure production is more convenient, and use cost is lower, can satisfy the cooperation use demand of high strength anti-pulling nut to can realize the high-strength combination of a small number and use connection effect.

Description

Firm type lower margin expansion nut

Technical Field

The utility model relates to the technical field of expansion nuts, in particular to a firm foundation expansion nut.

Background

The lower margin expansion nut is used for fixing the nut structure on the ground, and it is different with general expansion bolt, and nut fastening space when needs to provide the later stage and joins in marriage, and general nut structure is when carrying out the cooperation on ground, and the gripping force between the ground is unstable, and the pulling resistance in the use is relatively poor, and the security when using can't be ensured, and to some connection products that bear the weight of intensity requirement and have relatively high, the convenience when using is relatively poor, and use cost is also relatively high.

Disclosure of Invention

The utility model aims to provide a firm foundation expansion nut, which adopts a brand-new structural design, and through arranging firm matching grooves which are mutually matched in multiple combinations and have different depths on a nut main body structure, a step-by-step firm matching anti-loosening force can be formed between the firm matching grooves and the ground during use, the structural strength of the expansion position of the main body can be ensured, the firm matching grooves and the ground main body can be comprehensively and tightly matched during later use by matching expansion plugs, the firm foundation expansion nut has a reliable anti-pulling firm matching effect, the anti-pulling force during use is stronger, the safety during later use is higher, the whole structure production is more convenient, the use cost is lower, and the matching use requirement of the high-strength anti-pulling nut can be met, so that the combined use connecting effect with a small quantity of high strength can be realized.

The technical scheme of the utility model is as follows:

the utility model provides a firm type lower margin expansion nut, includes by the cylindrical nut main part spliced pole of metal material for upper and lower direction of just center pin, the upper end central point of nut main part spliced pole puts and is equipped with the cylindrical central cooperation connecting hole that runs through whole lower extreme, the upper end position of central cooperation connecting hole is equipped with fastening connection screw hole, its characterized in that: the length of the fastening connection screw hole in the up-down direction is smaller than half of the length of the nut main body connecting column in the up-down direction, the outer cylindrical surface of the nut main body connecting column is provided with circumferential uniform distribution and is used for enabling the lower end of the nut main body connecting column to penetrate through the expansion convenient open slot completely, the inside of the expansion convenient open slot is communicated with the central matching connecting hole, the edge position of the lower end of the central matching connecting hole is provided with an expansion plug combined guide slot, the outer cylindrical surface of the nut main body connecting column is provided with three groups of first firm matching slots which are uniformly distributed in the up-down direction and are outward opened, the depth and the width of the first firm matching slots from top to bottom are sequentially increased, the outer cylindrical surface of the nut main body connecting column is provided with a second firm matching slot with an opening outside which is trapezoidal in cross section at the lower end of the first firm matching slot, and the depth of the second firm matching slot is larger than that of the lower end of the first firm matching slot.

Further, the length of the opening groove convenient to expand in the up-down direction is smaller than half of the length of the nut main body connecting column in the up-down direction.

Further, the combined guide groove of the expansion plug is a conical guide groove.

Further, the distance from the upper end position to the upper and lower directions of the first firm matching groove to the second firm matching groove is greater than four fifths of the height of the upper and lower directions of the convenient opening groove.

Further, the depth of the second firm-fit groove is less than or equal to half of the wall thickness from the outer cylindrical surface of the nut body connecting column to the inner cylindrical surface of the center fit connecting hole.

The utility model has the beneficial effects that:

according to the utility model, a brand-new structural design is adopted, through arranging the firm matching grooves which are mutually matched in multiple combinations and have different depths on the main body structure of the nut, a step-by-step firm matching anti-loosening force can be formed between the nut and the ground during use, the structural strength of the expansion position of the main body can be ensured, the expansion plug is matched for combined use during later use, the firm matching groove position and the ground main body can be comprehensively and firmly matched, a reliable pulling-resistant firm matching effect is achieved, the pulling-resistant force during use is stronger, the safety in the later use process is higher, the whole structure is more convenient to produce, the use cost is lower, the matching use requirement of the high-strength pulling-resistant nut can be met, and therefore, the combined use connecting effect with a small quantity of high strength can be realized.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic front view of the present utility model;

FIG. 3 is a left side schematic view of the present utility model;

FIG. 4 is a schematic cross-sectional view of the A-A position of the present utility model;

FIG. 5 is a schematic top view of the present utility model;

FIG. 6 is a schematic bottom view of the present utility model;

FIG. 7 is a schematic perspective view of a second direction of the present utility model;

in the figure: 1. nut main part spliced pole, 2, center cooperation connecting hole, 3, fastening connection screw hole, 4, the convenient open slot of inflation, 5, expansion plug combination guide way, 6, first firm cooperation groove, 7, the firm cooperation groove of second.

Detailed Description

As shown in fig. 1 to 7, a firm type anchor expansion nut comprises a cylindrical nut body connecting post 1 made of a metal material and having a central axis in the up-down direction, wherein a cylindrical central mating connecting hole 2 penetrating through the entire lower end is provided at the central position of the upper end of the nut body connecting post 1, and is a circular hole. The upper end position of the central matching connection hole 2 is provided with a fastening connection threaded hole 3 which is a fastening thread matching groove used in the later period. The length of the fastening connection threaded hole 3 in the up-down direction is smaller than half of the length of the nut main body connecting column 1 in the up-down direction, so that the lower end position is ensured to have a larger matching space as an expansion matching structure, and the stability of the whole ground combination can be ensured. The outer cylindrical surface of the nut body connecting column 1 is provided with the convenient expansion open slot 4 which is uniformly distributed along the circumference and completely penetrates through the lower end of the nut body connecting column 1 near the lower end, so that the lower end position has safer deformation fit when expanding. The inside of the convenient open slot 4 of inflation with the center cooperation connecting hole 2 communicates with each other, the lower extreme edge position of center cooperation connecting hole 2 is equipped with expansion plug combination guide way 5, and the lower extreme position cooperation expansion plug is used in combination, can make the lower extreme position produce deformation when cooperating to fasten with ground and make up together. The outer cylinder of nut main part spliced pole 1 leans on the lower extreme position to be equipped with the opening outside and for upper and lower evenly distributed's three first firm mating groove 6 of group, three first firm mating groove 6 from the top down's degree of depth and width all increase in proper order, can form the cooperation locking force of step between ground when using, ensure whole complex fastness. The outer cylindrical surface of the nut main body connecting column 1 is located the lower end position of the first firm matching groove 6 is provided with a second firm matching groove 7 with an opening outside and a trapezoid cross section, so that the matching connection space between the lower end position and the ground is larger, and the matching firmness is stronger. The depth of the second firm matching groove 7 is larger than that of the first firm matching groove 6 at the lower end, the matching area between the second firm matching groove and the ground in the use process is guaranteed to be larger, and the integral pulling resistance is stronger, so that the use requirement of the connection matching with stronger pulling resistance in the later use process can be met, and the connection bearing strength in the later use process can be guaranteed without using a plurality of expansion nuts. The novel structure design is adopted, through setting up the firm cooperation groove that many combinations mutually support and degree of depth are different on nut major structure, can form firm cooperation locking force step by step with between the ground when using, and can ensure the structural strength of main part inflation position, the cooperation expansion plug is used in the later stage when using in the combination, can make firm cooperation groove position carry out comprehensive fastening's cooperation with ground main part, reliable anti-pulling firm cooperation effect has, the resistance to plucking when using is stronger, the security in the later stage use is higher, its overall structure production is more convenient, use cost is lower, can satisfy the cooperation use demand of high strength anti-plucking nut, thereby can realize the combination use connection effect of a small amount of high strength.

When the expansion plug is used, the lower end position is matched with the expansion plug for combined use, the expansion plug can deform the whole lower end position after being inserted into the expansion position, so that the expansion plug can be combined with a ground main body structure, the anti-pulling fit groove position can be matched with the ground in a larger area, the combination anti-pulling force is more reliable, and the fit safety in later use can be ensured. When in use, the anti-loosening effect of the step is formed at the matching position with the ground, the overall matching firmness is better, and the overall safety in the use process is higher.

Preferably, the length of the expansion convenient open slot 4 in the up-down direction is less than half of the length of the nut main body connecting column 1 in the up-down direction, so that the influence of the opening position on the strength of the main body structure is less, the overall structural strength is more reliable, and the main body supporting strength is higher in later use.

Preferably, the expansion plug combination guide groove 5 is a conical guide groove, so that the operation of matching and connecting during combination is more convenient, and the production and processing are easier.

Preferably, the distance from the upper end position to the upper and lower direction of the first firm matching groove 6 to the second firm matching groove 7 is greater than four fifths of the height of the expansion convenient opening groove 4 in the upper and lower direction, so that the matching space of the main body expansion matching position is ensured to be more comprehensive, the overall utilization ratio of the combined space is higher, and the expansion firmness during use is more reliable.

Preferably, the depth of the second firm-fit groove 7 is less than or equal to half the wall thickness from the outer cylindrical surface of the nut body connecting post 1 to the inner cylindrical surface of the central fit connecting hole 2, so that the strength of the expansion position structure is more ensured, and the supporting strength of the expansion position structure, particularly the strength of the bottom position, is affected if the depth is too large.

While the foregoing is directed to the preferred embodiments of the present utility model, it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions should also be considered to be within the scope of the present utility model.

Claims (5)

1. The utility model provides a firm type lower margin expansion nut, includes by metal material and center pin be cylindrical nut main part spliced pole (1) of upper and lower direction, the upper end central point of nut main part spliced pole (1) puts and is equipped with cylindrical center cooperation connecting hole (2) that run through whole lower extreme, the upper end position of center cooperation connecting hole (2) is equipped with fastening connection screw hole (3), its characterized in that: the length of fastening connection screw hole (3) upper and lower direction is less than half of nut main part spliced pole (1) upper and lower direction length, the outer cylinder of nut main part spliced pole (1) lean on the lower extreme position to be equipped with circumference evenly distributed and will nut main part spliced pole (1) lower extreme is the convenient open slot (4) of inflation that runs through completely, the inside of the convenient open slot (4) of inflation with center cooperation spliced pole (2) communicates with each other, the lower extreme edge position of center cooperation spliced pole (2) is equipped with expansion plug combination guide way (5), the outer cylinder of nut main part spliced pole (1) is equipped with opening outside and is upper and lower evenly distributed's three first firm cooperation grooves (6), three sets of first firm cooperation groove (6) from the top down's degree of depth and width all increase gradually, the outer cylinder of nut main part spliced pole (1) is located the lower extreme position of first firm cooperation groove (6) is equipped with the second firm cooperation groove (7) that the open cross-section is trapezoidal, second firm cooperation groove (7) are greater than first firm cooperation groove (6) of depth outside.

2. A secure foundation expansion nut as defined in claim 1, wherein: the length of the opening groove (4) convenient to expand in the up-down direction is smaller than half of the length of the nut main body connecting column (1) in the up-down direction.

3. A secure foundation expansion nut as defined in claim 1, wherein: the expansion plug combined guide groove (5) is a conical guide groove.

4. A secure foundation expansion nut as defined in claim 1, wherein: the distance from the upper end position of the first firm matching groove (6) to the second firm matching groove (7) is greater than four fifths of the height of the expansion convenient opening groove (4) in the up-down direction.

5. A secure foundation expansion nut as defined in claim 1, wherein: the depth of the second firm matching groove (7) is smaller than or equal to half of the wall thickness from the outer cylindrical surface of the nut main body connecting column (1) to the inner cylindrical surface of the center matching connecting hole (2).