CN209053919U - A kind of fixation hole and attachment device of screw - Google Patents

Abstract

The utility model discloses a kind of fixation hole of screw and attachment devices, comprising: the inner wall of the fixation hole is equipped with several inner convex ribs；Between the adjacent inner convex rib, the inner wall of the fixation hole is equipped with inner groovy；Under the screw screw-in state, the inner convex rib directly squeezes the inner convex rib and forms the thread with screw cooperation on the inner convex rib with screw contact, the screw；The inner groovy is the accommodating space of the extrded material of the thread.The fixation hole high production efficiency and rejection rate of this kind of screw are low.

Description

Fixing hole and connecting device of screw

Technical Field

The utility model belongs to connection structure's design field especially relates to a fixed orifices and connecting device of screw.

Background

The screw fixing holes in the existing metal structural parts of aluminum, zinc, copper, iron and the like are generally in a mode of drilling a bottom hole by a drill and tapping a screw thread by a screw tap, and the mode has low production efficiency, high rejection rate and higher comprehensive cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved object of the utility model is to provide a fixed orifices and connecting device of screw, the fixed orifices production efficiency high rejection rate of this kind of screw is low.

In order to solve the above problem, the technical scheme of the utility model is that:

a fixing hole of a screw, comprising:

a plurality of inner convex ribs are arranged on the inner wall of the fixing hole; an inner groove is formed in the inner wall of each fixing hole between every two adjacent inner ribs;

when the screw is in a screwed-in state, the inner convex rib is directly contacted with the screw, and the screw extrudes the inner convex rib and forms a thread matched with the screw on the inner convex rib;

the inner groove is an accommodating space for the extrusion material of the screw teeth.

According to an embodiment of the present invention, the diameter of the inscribed circle of the inner convex ribThe numerical ranges of (A) are as follows:

diameter of circumscribed circle of the inner grooveThe numerical ranges of (A) are as follows:

wherein,

d is the minor diameter of the screw; d is the major diameter of the screw; h is the height of the screw thread of the screw.

According to an embodiment of the present invention, the cross-sectional shape of the inner rib and/or the inner groove is a long strip shape and/or a triangular shape and/or a circular arc shape and/or a trapezoidal shape.

According to an embodiment of the present invention, the number of the inner ribs is two or three or four.

According to the utility model discloses an embodiment, the opening part of fixed orifices is equipped with the direction inclination, the direction inclination is used for as the installation location benchmark during the screw.

According to the utility model discloses an embodiment, the external diameter size at direction inclinationThe numerical ranges of (A) are as follows:

the utility model also provides a connecting device, including in any one of the above-mentioned embodiments the fixed orifices of screw.

The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:

1) the utility model discloses a fixed orifices of screw that embodiment provided sets up a plurality of interior ribs and sets up the inner groovy between adjacent interior rib at the inner wall of the fixed orifices that is used for installing the screw, when the screw is screwed in the fixed orifices, the screw extrudes interior rib and forms the thread with screw complex on the interior rib, the inner groovy does not contact with the screw, has reduced the resistance that the screw precession, and the inner groovy can also be the accommodation space of the extrusion material of thread; the embodiment of the utility model provides a fixed orifices of screw uses the mode of exempting from to attack the tooth during manufacturing, and the fixed orifices of the screw of tapping the screw tooth for current screw tap has greatly improved the production efficiency of product to the rejection rate has been reduced.

2) The diameter of the inscribed circle of the inner convex ribThe numerical ranges of (A) are set as:wherein d is the minor diameter of the screw, H is the thread height of the screw,the value range of (A) is a preferable size obtained by mechanical analysis and test, and a fixing hole of the screw satisfying the preferable size is convenient to use and easy to provide pre-tightening force necessary for mounting the screw.

3) The diameter of the circumcircle of the inner grooveThe numerical ranges of (A) are set as: d is the major diameter of the screw, and the inner groove meeting the numerical range can form a material moving space for extruding the screw thread and can reduce the resistance for screwing the screw in.

Drawings

Fig. 1a is a schematic structural view of a fixing hole of a screw according to the present invention;

FIG. 1b is a top view of the fastening hole of the screw shown in FIG. 1 a;

FIG. 2 is a schematic view of a screw fixing hole structure of the present invention for mounting a screw;

FIG. 3a is a schematic view of a screw hole structure including two elongated inner ribs;

FIG. 3b is a top view of the fastening hole of the screw shown in FIG. 3 a;

FIG. 3c is a cross-sectional view of the fastening hole of the screw shown in FIG. 3 a;

FIG. 4a is a schematic view of a screw hole structure including three elongated inner ribs;

FIG. 4b is a top view of the fastening hole of the screw shown in FIG. 4 a;

FIG. 4c is a cross-sectional view of the fastening hole of the screw shown in FIG. 4 a;

FIG. 5a is a schematic view of a screw hole structure including three triangular inner ribs;

FIG. 5b is a top view of the mounting hole of the screw of FIG. 5 a;

FIG. 5c is a cross-sectional view of the fastening hole of the screw shown in FIG. 5 a;

FIG. 6a is a schematic view of a screw hole structure including three circular-arc-shaped inner ribs;

FIG. 6b is a top view of the fastening hole of the screw shown in FIG. 6 a;

FIG. 6c is a cross-sectional view of the fastening hole of the screw shown in FIG. 6 a;

FIG. 7a is a schematic view of a screw hole structure including three trapezoidal inner ribs;

FIG. 7b is a top view of the mounting hole of the screw of FIG. 7 a;

FIG. 7c is a cross-sectional view of the fastening hole of the screw shown in FIG. 7 a;

FIG. 8a is a schematic view of a screw hole structure including four circular-arc-shaped inner ribs;

FIG. 8b is a top view of the mounting hole of the screw of FIG. 8 a;

FIG. 8c is a cross-sectional view of the fastening hole of the screw shown in FIG. 8 a;

FIG. 9a is a schematic view of a screw retaining hole structure including two planar inner ribs;

FIG. 9b is a top view of the mounting hole of the screw of FIG. 9 a;

FIG. 9c is a cross-sectional view of the fastening hole of the screw of FIG. 9 a;

FIG. 10a is a schematic view of a screw retaining hole structure including three planar inner ribs;

FIG. 10b is a top view of the mounting hole of the screw of FIG. 10 a;

fig. 10c is a cross-sectional view of the fastening hole of the screw shown in fig. 10 a.

Description of reference numerals:

1: a fixing hole; 2: a screw;

11: a support portion; 12: mounting holes;

121: an inner convex rib; 122: an inner groove; 123: screw teeth; 124: and guiding the inclination angle.

Detailed Description

The fixing hole and the connecting device of the screw according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that "fig. 1" in the following embodiments refers to the series of drawings in fig. 1, that is, fig. 1 includes fig. 1a and fig. 1 b; "FIG. 3" refers to the series of drawings of FIG. 3, i.e., FIG. 3 includes FIG. 3a, FIG. 3b, and FIG. 3 c; the rest of the drawings are analogized in the same way.

Referring to fig. 1 and 2, in the fixing hole 1 of an embodiment, the inner wall of the fixing hole 1 is provided with a plurality of inner ribs 121, and between adjacent inner ribs 121, the inner wall of the fixing hole 1 is provided with inner grooves 122, and specifically, the fixing hole 1 includes: a support portion 11 for providing overall structural stability of the fixing hole 1; and a mounting hole 12 opened on the upper surface or the lower surface of the support portion 11 for mounting the screw 2; wherein, a plurality of inner ribs 121 and inner grooves 122 are arranged on the inner wall of the mounting hole 12; when the screw 2 is screwed in, the inner convex rib 121 is directly contacted with the screw 2, and the screw 2 extrudes the inner convex rib 121 and forms a thread 123 matched with the screw 2 on the inner convex rib 121; the inner groove 122 is a space for accommodating an extrusion material of the screw thread 123.

In the fixing hole 1 of the screw provided by the above embodiment, the inner walls of the mounting holes 12 for mounting the screw 2 are provided with the plurality of inner convex ribs 121 and the inner grooves 122 are arranged between the adjacent inner convex ribs 121, when the screw 2 is screwed into the mounting hole 12, the screw 2 extrudes the inner convex ribs 121 and forms the screw teeth 123 matched with the screw 2 on the inner convex ribs 121, the inner grooves 122 are not contacted with the screw 2, so that the screwing resistance of the screw 2 is reduced, and the inner grooves 122 can also be accommodating spaces for extrusion materials of the screw teeth 123; the screw fixing hole 1 provided by the embodiment adopts a tapping-free mode during manufacturing, so that the production efficiency of the product is greatly improved and the rejection rate is reduced compared with the screw fixing hole 1 for tapping the screw thread 123 by the existing screw tap. In addition, when the fixing hole 1 of the screw is used for die-casting parts, the fixing hole can be directly formed by a die-casting die, and when the fixing hole is used for sheet metal parts, the fixing hole can be formed by a punching die at one time, so that the position and the size are more accurate.

In one embodiment, the diameter of the inscribed circle of the inner bead 121The numerical ranges of (A) are as follows:

diameter of the circumscribed circle of the inner groove 122The numerical ranges of (A) are as follows:

wherein,

d is the minor diameter of the screw 2; d is the major diameter of the screw 2; h is the height of the thread 123 of the screw 2.

The range of values of (a) is a preferred size obtained through mechanical analysis and test, and the fixing hole 1 satisfying the preferred size is convenient to use and easy to provide the pre-tightening force necessary for installing the screw 2. While simultaneously reducing the diameter of the circumscribed circle of the inner groove 122The numerical ranges of (A) are set as:the inner groove 122 satisfying this value range can form a material movement space for pressing the thread and can reduce the resistance to the screw 2 being screwed in.

In addition, the aboveAndthe numerical range of (1) is increased by taking the size parameter of the screw 2 as a calculation parameter, so that the fixing hole 1 provided by the embodiment has more universality, and the corresponding fixing hole 1 can be conveniently designed according to the specific size of the screw 2.

Referring to fig. 2-10, in some embodiments, the cross-sectional shape of the inner ribs 121 and/or the inner grooves 122 is elongated and/or triangular and/or rounded and/or trapezoidal. Of course, the number of the inner ribs 121 may also be changed according to actual requirements, and may be two, three or four, for example.

Referring again to fig. 1 and also to fig. 2-10, in some embodiments, the opening of the fixing hole 1 (mounting hole 12) is provided with a guiding inclination 124, and the guiding inclination 124 is used as a positioning reference when mounting the screw 2. Utensil for cleaning buttockBody, guide slope 124 outer diameter dimensionThe numerical ranges of (A) are as follows:

d is the major diameter of the screw 2.

The utility model also provides a connecting device, including the fixed orifices 1 of the screw in above-mentioned arbitrary one embodiment. The connecting device in the embodiment can reserve the fixing holes 1 of various screws according to the needs, can be used for expanding various user requirements, and does not need to increase more processing cost.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.

Claims (7)

1. The fixing hole of the screw is characterized in that a plurality of inner convex ribs are arranged on the inner wall of the fixing hole;

an inner groove is formed in the inner wall of each fixing hole between every two adjacent inner ribs;

when the screw is in a screwed-in state, the inner convex rib is directly contacted with the screw, and the screw extrudes the inner convex rib and forms a thread matched with the screw on the inner convex rib;

the inner groove is an accommodating space for the extrusion material of the screw teeth.

2. The screw fixing hole of claim 1, wherein the diameter of the inscribed circle of the inner rib is set to be larger than the diameter of the inscribed circle of the inner ribThe numerical ranges of (A) are as follows:

diameter of circumscribed circle of the inner grooveThe numerical ranges of (A) are as follows:

wherein,

d is the minor diameter of the screw; d is the major diameter of the screw; h is the height of the screw thread of the screw.

3. The screw fastening hole of claim 1, wherein the cross-sectional shape of the inner rib and/or the inner groove is a bar shape and/or a triangle shape and/or a circular arc shape and/or a trapezoid shape.

4. The screw fixing hole of claim 1, wherein the number of the inner ribs is two or three or four.

5. The screw fixing hole according to any one of claims 2 to 4, wherein a guide inclination is provided at an opening of the fixing hole, and the guide inclination is used as a positioning reference when the screw is installed.

6. As claimed in claim 5The screw fixing hole is characterized in that the outer diameter of the guide inclination angle isThe numerical ranges of (A) are as follows:

7. a connection device, characterized in that it comprises a fixing hole for a screw according to any one of claims 1 to 6.