KR20230012322A - Bolt, base metal for bolting and bolt assembly - Google Patents

Abstract

The present invention presents a bolt which comprises: a body unit extended in one direction and having a screw thread formed on an outer circumferential surface; a head unit having one surface coupled to one end unit on one side of the body unit and having a fastening means arranged on one or more of the other surface facing the one surface and side surfaces connected to the one surface; and a plurality of anchor units arranged on one surface of the head unit, and arranged in a circumferential direction of an outer circumferential surface of the body unit, and respectively having a peak towards a surface of a base metal for forcibly binding the head unit with a surface of the base metal. The anchor units are formed to be inclined for a certain angle in the same direction from the peaks to the surface of the base metal. The bolt is able to prevent the loosening by an external force.

Description

Bolt, base material for bolting and bolt assembly {BOLT, BASE METAL FOR BOLTING AND BOLT ASSEMBLY}

The present invention relates to a bolt, a base material for bolting, and a bolt assembly, and more particularly, to a bolt, a base material for bolting, and a bolt assembly capable of preventing loosening due to external force.

Recently, as the demand for mobile electronic devices and eco-friendly vehicles increases, the demand for secondary batteries used as energy sources is also rapidly increasing. For this reason, research and development related to high-performance secondary batteries are being actively conducted.

Such a secondary battery may be used in the form of a battery module configured by connecting a plurality of battery cells in series or parallel so as to exhibit desired capacity characteristics in a device to which it is applied.

In this case, the battery module may include many parts such as a battery cell, a housing, a holder, a heat sink, a bus bar, and a circuit board. Also, these parts can be coupled to each other, for example by means of bolting.

On the other hand, when external stimuli, such as vibration and impact, are repeated during operation of the device, the fastening force is weakened and the coupling is released.

The background technology of the present invention is published in the following patent documents.

KR 10-2019-0001407 A KR 10-2021-0060239 A KR 10-2021-0066516 A

The present invention provides a bolt, a base material for bolting, and a bolt assembly capable of preventing loosening due to external force.

A bolt according to an embodiment of the present invention is a bolt that can be bolted to a base material, and includes a body portion extending in one direction so that one end thereof faces the base material and having a screw thread on an outer circumferential surface thereof; a head part having one surface coupled to the other end of the body part and having a fastening means provided on at least one of the other surface facing the one surface and the side surface connected to the one surface; A plurality of anchor parts provided on one surface of the head part, arranged in a circumferential direction of the outer circumferential surface of the body part, and each having a tip in a direction toward the surface of the base material to forcibly bind the head part to the surface of the base material; It is configured to include, characterized in that the anchor portion is formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base material from the tip.

Each one surface of the plurality of anchor parts may be inclined at an angle of 10 ° to 30 ° with respect to the surface of the base material.

A direction in which the thread of the body portion rotates to be tightened into the screw hole of the base material is referred to as a tightening direction, and one surface of each of the plurality of anchor parts is formed to be inclined at a predetermined angle in the tightening direction with respect to the surface of the base material. can

A direction in which the thread of the body portion rotates to be loosened from the screw hole of the base material is referred to as a loosening direction, and one surface of each of the plurality of anchor parts is formed to be inclined at a predetermined angle in the loosening direction with respect to the surface of the base material. can

The plurality of anchor parts are spaced apart from each other at equal intervals in the circumferential direction of the outer circumferential surface of the body part and arranged in a circular line, and each tip protrudes from one surface of the head part by an amount of more than 0% and less than 50% of the distance between them. characterized by being

The plurality of anchor parts may be spaced apart from each other at an angle within a standard fastening angle with respect to the body part.

The reference fastening angle may be a predetermined angle selected within an angle range of more than 0° and less than or equal to 30°.

The inclined surface of each of the plurality of anchor portions includes a plurality of sides, and the plurality of sides include first and second sides opposing each other in the circumferential direction and opposing each other in a direction crossing the circumferential direction. Including the third side and the fourth side,

The first side is located on one surface of the head, and the third and fourth sides are inclined at an angle of 10 ° to 30 ° with respect to one surface of the head, so that the second side becomes a tip. there is.

The plurality of anchor parts may be spaced apart from an edge of one surface of the head part and an outer circumferential surface of the body part in a radial direction of the outer circumferential surface of the body part.

The plurality of anchor parts may include a material having different ductility from that of the base material.

Some of the plurality of anchor parts may include a material having greater ductility than the material of the base material, and others may include a material having less ductility than the material of the base material.

A base material for bolting according to an embodiment of the present invention is a base material for bolting capable of fastening a bolt, and includes a base portion extending into an area to which the bolt can be fastened; a screw hole that penetrates the surface of the base part in one direction and has a screw thread on an inner circumferential surface for fastening the bolt; a plurality of anchor parts provided on a surface of the base part, arranged in a circumferential direction of the inlet of the screw hole, and each having a tip protruding from the surface of the base part to forcibly bind the head of the bolt to the surface of the base part; It is configured to include, characterized in that the anchor portion is formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base portion from the tip.

The plurality of anchor parts are circularly aligned around the screw hole and spaced apart from each other at equal intervals, and the maximum value of the distance between them in the radial direction of the entrance of the screw hole is smaller than the size of the head of the bolt, , It may be characterized in that each tip protrudes from the surface of the base part by a size of more than 0% and less than 50% of the distance between each other.

The plurality of anchor parts may be spaced apart from each other at an angle within a standard fastening angle centered on the screw hole, and each upper surface may be inclined at an angle of 10 ° to 30 ° with respect to the surface of the base part. .

The reference fastening angle may be a predetermined angle selected within an angle range of more than 0° and less than or equal to 30°.

The inclined upper surface of each of the plurality of anchor portions includes a plurality of sides, and the plurality of sides face each other in a direction crossing the circumferential direction and first and second sides opposing each other in the circumferential direction. It includes a third side and a fourth side, wherein the first side is located on the surface of the base part, and the third side and the fourth side are inclined at an angle of 10 ° to 30 ° with respect to the surface of the base part, The second side may be characterized in that it becomes a tip.

The plurality of anchor parts may include a material having a different ductility from a material of the head part of the bolt.

Some of the plurality of anchor parts may include a material having greater ductility than the material of the head of the bolt, and others may include a material having less ductility than the material of the head of the bolt.

A bolt assembly according to an embodiment of the present invention is formed of a body portion extending in one direction and provided with a screw thread on an outer circumferential surface, one surface coupled to the other end of the body portion, and the other surface facing the one surface and a side surface connected to the one surface. A bolt having a head portion provided with a fastening means on at least one surface; A base material for bolting having a base portion extending into an area into which the bolt can be fastened, and a screw hole that penetrates the surface of the base portion in one direction and has a screw thread on an inner circumferential surface for fastening the bolt; It is provided on one surface of the head part or a surface of the base part, and is arranged in a circumferential direction of an outer circumferential surface of the body part or in a circumferential direction of an inlet of the screw hole, and one surface of the head part or the base part is forcibly coupled to the head part and the base part. A plurality of anchor parts each having a tip protruding from the surface of the part; and a plurality of concave portions concavely formed on a surface of the base portion or one surface of the head portion so that the plurality of anchor portions can be inserted, respectively, and wherein the anchor portion is at a predetermined angle in the same direction with respect to the surface of the base portion from the tip. It is characterized in that it is formed to be inclined.

The plurality of anchor parts are spaced apart from each other at equal intervals in the circumferential direction of the outer circumferential surface of the body part or in the circumferential direction of the inlet of the screw hole and are circularly aligned, and each tip is greater than 0% and less than 50% of the distance between each other. It protrudes from one surface of the head part or the surface of the base part by the size, is spaced apart from the edge of one surface of the head part and the outer circumferential surface of the body part, and is spaced apart from each other at an angle within a standard fastening angle centered on the body part or the screw hole , Each one side or the other side is formed to be inclined at an angle of 10 ° to 30 ° with respect to one side of the head part or the surface of the base part, and the reference fastening angle is selected within an angle range of more than 0 ° and less than 30 °. can be done with

In each of the plurality of anchor parts, a shape of a cross section in a circumferential direction of an outer circumferential surface of the body part or in a circumferential direction of an inlet of the screw hole has a shape of a right triangle, and each of the plurality of recessed parts has a shape of each of the plurality of anchor parts. It may be formed in a shape corresponding to, and formed in a size such that each of the plurality of anchor parts can be inserted at an interval.

According to an embodiment of the present invention, when a bolt is bolted to a threaded hole of a base material for bolting using a plurality of anchor parts provided on one surface of the head part of the bolt, the head part of the bolt and the surface of the base material for bolting are forcibly bound, Unwinding due to external force can be prevented.

In addition, according to an embodiment of the present invention, by using a plurality of anchor parts provided on the surface of the base part for bolting, when bolting a bolt in a screw hole formed in the base part, the surface of the base part and the head part of the bolt are forcibly coupled. , can prevent loosening due to external force.

In addition, according to an embodiment of the present invention, by using a plurality of anchor parts provided in the head part of the bolt or the base part of the base material for bolting, and a plurality of hamstring parts provided in the base part of the base material for bolting or the head part of the bolt When a bolt is bolted into a screw hole formed in the base portion, loosening due to external force can be prevented by forcibly binding the base portion of the base material for bolting and the head portion of the bolt by inserting each anchor portion into each recessed portion.

1 is a schematic diagram of a bolt according to a first embodiment of the present invention.
2 is a view showing a state in which a bolt according to a first embodiment of the present invention is coupled to a base material for bolting.
3 is a schematic diagram of a base material for bolting according to a second embodiment of the present invention.
4 is a view showing a state in which bolts are coupled to a base material for bolting according to a second embodiment of the present invention.
5 is an exploded view of a bolt assembly according to a third embodiment of the present invention.
6 is a coupled view of a bolt assembly according to a third embodiment of the present invention.
7 is an exploded view of a bolt assembly according to a fourth embodiment of the present invention.
8 is a coupling view of a bolt assembly according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and will be implemented in a variety of different forms. Only the embodiments of the present invention are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention. In order to explain an embodiment of the present invention, the drawings may be exaggerated, parts irrelevant to the description may be omitted from the drawings, and like reference numerals in the drawings refer to the same elements.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1. Bolt according to the first embodiment of the present invention

1 is a schematic view of a bolt according to a first embodiment of the present invention, and FIG. 2 is a view showing a bolt according to a first embodiment of the present invention coupled to a base material for bolting.

1 to 2, the bolt 100 according to the first embodiment of the present invention is a bolt 100 that can be bolted to a base material 200, and includes a body part 110, a head part 120, And it is configured to include a plurality of anchor parts (130).

On the other hand, the base material 200 may be a main body of various components such as a housing, a holder, a heat sink, a bus bar, and a circuit board of a battery module, and may be provided with a screw hole 210 so that the bolt 100 can be bolted. can The base material 200 may include an upper body and a lower body, a screw hole 210 is formed to penetrate the upper body and the lower body, and the upper body and the lower body may be coupled by the bolt 100 .

A periphery of the screw hole 210 on the surface of the base portion 210 of the base material 200 may be formed flat. That is, the surface of the base part 210 of the base material 200 is not formed with the anchor part 130 and the recessed parts 131 and 231 to be described later. On the other hand, in the drawing, only the portion where the screw hole 210 of the base material 200 is formed is shown.

1.1. Body part (110)

The body portion 110 may be formed to extend in one direction such that one end faces the base material 200 . In this case, one direction may be a vertical direction. Also, one end may be a lower end. The body portion 110 may have a circular bar shape. In addition, the body portion 110 may be provided with a screw thread on the outer circumferential surface.

The screw thread of the body part 110 rotates along the screw hole 220 formed in the base part 210 of the base material 200 and can be coupled by advancing into the screw hole 220 . Accordingly, the bolt 110 may be bolted to the base material 200 .

1.2. Head part (120)

One surface of the head part 120 may be coupled to the other end of the body part 110 . At this time, one side may be a side facing the body part 110 . That is, one surface may be a lower surface. Also, the other end may be an end facing the head part 120 . That is, the other end may be the upper end. The head part 120 may include one surface formed in a predetermined area in which the body part 110 and the plurality of anchor parts 130 may be formed, the other surface facing the one surface, and the side surface connecting one surface and the other surface. there is. Of course, the head portion 120 includes one surface 121 and the other surface 122, and the center of the other surface is convex and the edge thereof is formed to be inclined, so that the edge of the other surface may be connected to one surface. As such, the head portion 120 may have a structure including all of one surface, the other surface, and a side surface, or a structure including only one surface 121 and the other surface 122 without including the side surface.

A fastening means may be provided on at least one of the other surface and the side surface of the head unit 120 . The fastening means formed on the other surface of the head part 120 may be a driver groove 123 into which a driver can be inserted. In addition, the fastening means formed on the side of the head portion 120 may be a hexagonal surface that can be inserted into a wrench.

1.3. A plurality of anchor parts (130)

The plurality of anchor parts 130 may be provided on one surface of the head part 120, for example, on the lower surface. The plurality of anchor parts 130 are arranged in a circumferential direction of the outer circumferential surface of the body part 110 and may be spaced apart from each other at equal intervals in the corresponding direction. In addition, the plurality of anchor parts 130 may be spaced apart from an edge of one surface of the head part 120 in a radial direction of the outer circumferential surface of the body part, and may be spaced apart from the outer circumferential surface of the body part 110 .

The plurality of anchor parts 130 protrude in a direction toward the surface of the base part 210 of the base material 200 to forcibly bind the head part 120 to the surface of the base part 210 of the base material 200. A tip C may be provided, respectively. At this time, the plurality of anchor parts 130 may be formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base material from the tip (C). In addition, the direction in which the thread of the body portion 110 rotates to be tightened into the screw hole of the base material is referred to as a tightening direction, and the direction in which it rotates to be released from the screw hole of the base material is referred to as a loosening direction.

At this time, one surface of each of the plurality of anchor parts may be formed to be inclined at a predetermined angle in the tightening direction with respect to the surface of the base material. Inclining in the tightening direction means that one surface is inclined upward from the tip in the tightening direction. With this structure, when the bolt is fastened to the base material, the anchor part rubs against the base material on one side, so that the tightening can be smooth, and after the bolt is tightened to the base material, the tip can be strongly bound to the surface of the base material so that the bolt does not loosen. .

Of course, one surface of each of the plurality of anchor parts may be formed to be inclined at a predetermined angle in the loosening direction with respect to the surface of the base material. In this case, since the anchor unit strongly presses the surface of the base material when the bolt is fastened to the base material, the bolt can be strongly bound to the base material.

The plurality of anchor parts 130 may be aligned in a line in a circular shape in the circumferential direction of the outer circumferential surface of the body part 110 . Accordingly, the plurality of anchor parts 130 may be spaced apart from the outer circumferential surface of the body part 110 by the same distance in a radial direction of the outer circumferential surface of the body part 110 .

1.4. Protruding height of the plurality of anchor parts 130

The tips C provided on each of the plurality of anchor parts 130 extend from the head part 120 by a size greater than 0% and less than 50% of the distance L between each other in the circumferential direction of the outer circumferential surface of the body part 110. It may protrude from one side. That is, the protruding height H of each tip may be greater than 0% and less than 50% of the distance L between each tip and a neighboring tip. If the protruding height (H) of the tips exceeds 50% of the distance (L) between the tips, when bolting the bolt 100 to the base material 200 by an effective tightening angle with an effective tightening torque, the anchor portion 130 The bolt 100 and the base material 200 are excessively spaced apart by the protruding height H of and the body portion 110 of the bolt 100 may be excessively exposed to the outside of the screw hole 220, and the bolt ( Excessive tensile force may be applied to 100), and thus, the fastening portion may become weak and easily unstable due to external impact.

1.5. Effective tightening torque and effective tightening angle

Here, the effective fastening torque means the torque acting on the bolt 100 to obtain the fastening force required to mutually fix the base material 200 and the bolt 100, and may be a predetermined torque value smaller than the breaking torque of the bolt 100. there is. At this time, the effective fastening torque may be a range value.

In addition, the effective tightening angle increases the torque and when the base material 200 and the bolt 100 are mutually fixed, from the point when the torque reaches the minimum value of the effective tightening torque to the point when the torque reaches the maximum value of the effective tightening torque or the bolt ( 100) means the angle at which the bolt 100 rotates until the fastening is completed. Alternatively, the effective fastening angle refers to a predetermined angle at which the bolt 100 must be rotated with an effective fastening torque in order to obtain a fastening force necessary for fixing the base material 200 and the bolt 100 to each other. That is, when fastening the bolt 100 to the base material 200, if the bolt 100 is further rotated by the effective fastening angle from the point at which the effective fastening angle is applied to the bolt 100, the fastening of the bolt 100 is completed It can be. This effective engagement angle may be referred to as a reference engagement angle. For example, the reference fastening angle may be a predetermined angle selected within an angle range of greater than 0° and less than or equal to 30°.

The above effective tightening torque and effective tightening angle may be determined as predetermined values depending on the material of the base material 200 and the bolt 100, surface roughness, dimensional accuracy, lubrication condition, and the like.

1.6. Separation angle of the plurality of anchor parts 130

The plurality of anchor parts 130 may be spaced apart from each other at an angle within the standard fastening angle with the body part 110 as the center. For example, if the standard fastening angle is 30°, the angle θ of the plurality of anchor units 130 spaced apart from each other may be 30°. At this time, the number of the plurality of anchor units 130 may be 12. If the reference fastening angle is 20°, the angle θ of the plurality of anchor parts 130 spaced apart from each other may be 20°. At this time, the number of the plurality of anchor units 130 may be 18. On the other hand, the separation angle of the plurality of anchor parts 130 is an angle centered on the center of one surface of the head part 120, and within a range that satisfies that the plurality of anchor parts 130 can be spaced apart from each other, 0 It can be selected within an angle range of more than 30 degrees and less than 30 degrees.

Here, when the plurality of anchor parts 130 are spaced apart from the body part 110 at an angle exceeding the reference fastening angle, while rotating the bolt 100 by the reference fastening angle with an effective fastening torque, the plurality of anchor parts ( 130) may not be sufficiently brought into contact with the base material 200.

For example, while rotating the bolt 100 by the reference tightening angle with the effective tightening torque, the tip C of the anchor portion 130 passes along the circumference of the screw hole 220 while contacting the surface of the base material 200. When the separation angle of the dog anchor portion 130 exceeds the reference fastening angle, a portion where the tip of the anchor portion 130 does not contact occurs around the screw hole.

The tip C of the anchor part 130 is irregularly deformed while passing while contacting the surface of the base material 200, creating a myriad of fine irregularities. It is used for force bonding to the surface.

Accordingly, if the area where the tip C of the anchor part 130 passes while contacting the surface of the base material 200 is reduced, the forced coupling force between the anchor part 130 and the surface of the base material 200 may be reduced by that amount.

Therefore, as the plurality of anchor parts 130 are spaced apart from the body part 110 by the standard fastening angle, they can contact the surface of the base material 200 with the widest area along the circumference of the screw hole 220, , Accordingly, when the bolting is completed, the surface of the base material 200 may be forcefully bound to the anchor unit 130.

1.7. The shape of the plurality of anchor parts 130

Each of the plurality of anchor parts 130 faces one surface, for example, a bottom surface facing the surface of the base part 210 of the base material 200 in the vertical direction, a rear surface facing the lower surface in the circumferential direction, and a radial direction, , It may be provided with both sides connecting the lower surface and the rear surface. Each of the plurality of anchor parts 130 may have a tetrahedral shape, and a cut surface obtained by cutting each of the plurality of anchor parts 130 in a circumferential direction may have a right triangle shape.

The lower surface of each of the plurality of anchor units 130 may be inclined at an angle of 10° to 30° with respect to the lower surface of the head unit 120 . At this time, the lower surface of each of the plurality of anchor parts 130 may face forward or backward.

Here, the front may mean a direction in which the anchor unit 130 advances when the bolt 100 is rotated in a direction to fasten the base material 200 . That is, the front may mean a direction in which the bolt 100 is tightened. Conversely, the rear may mean a direction in which the bolt 100 is released.

When the lower surface of each of the plurality of anchor parts 130 is inclined at an angle of less than 10 ° with respect to the lower surface of the head part 120, it is difficult to sufficiently secure the protrusion height H of the anchor part 130, and the anchor When the bolt 100 is rotated at the standard fastening angle after contact between the portion 130 and the base material 200, a desired fastening force cannot be sufficiently applied between the anchor part 130 and the base material 200.

When the lower surface of each of the plurality of anchor parts 130 is inclined at an angle exceeding 30° with respect to the lower surface of the head part 120, the protruding height H of the anchor part 130 is higher than the anchor parts 130. The height exceeds 50% of the separation distance (L) between the bolts 100 and the base material 200 are excessively spaced apart by the protrusion height H of the anchor portion 130, and the body portion of the bolt 100 110 may be excessively exposed to the outside of the screw hole 220 . Thus, excessive tensile force may be applied to the bolt 100, the fastening portion may become weak, and may be easily unstable due to external impact. Meanwhile, the size of each of the plurality of anchor parts 130 in the circumferential direction may be determined by the protrusion height H and the angle of the lower surface.

The inclined lower surface of each of the plurality of anchor parts 130 may include a plurality of sides. The plurality of sides may include first and second sides opposing each other in a circumferential direction, and third and fourth sides opposing each other in a direction crossing the circumferential direction.

In addition, the inclined lower surface of each of the plurality of anchor parts 130 has a first side located on one surface of the head part, and a third side and a fourth side with respect to one surface of the head part 120 at an angle of 10° to 30°. By inclining, the second side can become a tip.

1.8. Material of the plurality of anchor parts 130

The plurality of anchor parts 130 may include a material having different ductility from that of the base material 200 . In this case, all of the plurality of anchor parts 130 may include a material having greater ductility than the material of the base material 200 . As a result, when the tip C of the anchor portion 130 passes while contacting the base material 200, the surface of the tip C is irregularly deformed so that the base material 200 can be bound to the steel material.

Meanwhile, some of the plurality of anchor parts 130 may include a material having greater ductility than the material of the base material 200, and others may include a material having less ductility than the material of the base material. In this case, the anchor portion 130, which is more ductile than the base material 200, is deformed at the surface height of the base material 200 and bound to the base material 200, and the anchor portion 130, which is less ductile than the base material 200, is the base material. It can be bound to the base material 200 by digging into the surface of the base material 200 finely and being deformed at a predetermined height lower than the surface of the base material 200. Accordingly, as the height of the binding portion between the anchor portion 130 and the base material 200 is formed in a zigzag pattern, the anchor portion 130 may be more strongly bound to the base material 200 .

2. Base material for bolting according to the second embodiment of the present invention

3 is a schematic diagram of a base material for bolting according to a second embodiment of the present invention. 4 is a view showing a state in which bolts are coupled to a base material for bolting according to a second embodiment of the present invention.

3 to 4, the bolting base material 200 according to the second embodiment of the present invention is a bolting base material 200 capable of fastening the bolt 100, to which the bolt 100 is fastened. A base portion 210 extending to an area that can be formed, a screw hole 220 provided on an inner circumferential surface with a screw thread that penetrates the surface of the base portion 210 in one direction, for example, in an up and down direction, and allows the bolt 100 to be fastened. It is provided on the surface of the portion 210 and is arranged in the circumferential direction of the inlet of the screw hole 220, and the surface of the base portion 210 to forcibly bind the head portion of the bolt 100 to the surface of the base portion 210. It is configured to include a plurality of anchor parts 230 each having a tip (C) protruding from.

At this time, only the portion where the screw hole 210 of the base material 200 is formed is shown in the drawing.

On the other hand, the bolt 100 is a bolt that can be bolted to the base material, and one end is formed extending in one direction toward the base material, the body portion 110 having a screw thread on the outer circumferential surface, and one surface of the body portion 110 It may be a bolt 100 that is coupled to the other end and includes a head portion 120 provided with a fastening means on at least one of the other side facing the one side and the side surface connected to the one side. At this time, one surface of the head portion of the bolt 100 is formed flat except for the portion where the body portion 110 is formed, and the anchor portion 230 and the recessed portion 130 to be described later are not formed.

2.1 base part 210 and screw hole 220

The base unit 210 may be a main body of various components such as a battery module housing, a holder, a heat sink, a bus bar, and a circuit board. The base part 210 may include an upper body and a lower body, and the upper body and the lower body may be coupled by the bolt 100. The screw hole 220 may be formed to pass through the upper body and the lower body of the base part 210 .

2.2. A plurality of anchor parts (230)

The plurality of anchor parts 230 according to the second embodiment of the present invention may have different positions on the surface formed from the plurality of anchor parts 130 according to the first embodiment described above. In addition, the above-described features of the plurality of anchor units 130 according to the first embodiment of the present invention may be similarly or identically applied to the plurality of anchor units 230 according to the second embodiment of the present invention. Therefore, hereinafter, the plurality of anchor units 230 according to the second embodiment of the present invention will be briefly described, and overlapping contents will be omitted from the description.

The plurality of anchor parts 230 are circularly aligned in a line around the screw hole 220 and spaced apart from each other. In the plurality of anchor parts 230, the maximum value of the separation distance between each other in the radial direction of the entrance of the screw hole 220 is smaller than the size of the head part 120 of the bolt 100, and each tip C is It may protrude from the surface of the base part 210 by an amount greater than 0% and less than 50% of the distance L between each other. That is, the protruding height H of the anchor portion 230 may be greater than 0% and less than 50% of the distance L between each tip C.

The plurality of anchor parts 230 are spaced apart from each other at an angle within the standard fastening angle centered on the screw hole 220, and each upper surface is inclined at an angle of 10 ° to 30 ° with respect to the surface of the base part. can Here, the reference fastening angle may be a predetermined angle selected within an angle range of greater than 0° and less than or equal to 30°.

The inclined upper surface of each of the plurality of anchor parts 230 includes a plurality of sides, and the plurality of sides include first and second sides opposing each other in the circumferential direction and opposing each other in a direction crossing the circumferential direction. It may include a third side and a fourth side. At this time, the first side is located on the surface of the base portion 210, the third side and the fourth side are inclined at an angle of 10° to 30° with respect to the surface of the base portion 210, so that the second side is at the tip C This can be.

The plurality of anchor parts 230 may include a material having different ductility from that of the head part 120 of the bolt 100 . At this time, some of the plurality of anchor parts 230 include a material that is more ductile than the material of the head part 120 of the bolt 100, and the rest is more ductile than the material of the head part 120 of the bolt 100. May contain small materials.

3. Bolt assembly according to the third embodiment of the present invention

5 is an exploded view of a bolt assembly according to a third embodiment of the present invention. 6 is a coupled view of a bolt assembly according to a third embodiment of the present invention.

5 and 6, the bolt assembly according to the third embodiment of the present invention includes a bolt 100, a base material for bolting 200, a plurality of anchor parts 310, and a plurality of recessed parts 410. It is composed of.

3.1. bolt(100)

The bolt 100 may include a body portion 110 and a head portion 120 . The body portion 110 may extend in one direction, for example, in a vertical direction. The body portion 110 may be provided with a screw thread on an outer circumferential surface. The head part 120 may include one surface 121 facing the body part 110 and the other surface 122 facing the one surface 121 . The head part 120 may further include a side surface between one surface 121 and the other surface 122 . One surface 121 of the head part 120 may be coupled to the other end of the body part 110 . The other surface 122 of the head portion 120 may be provided with a fastening means, for example, a driver groove 123 . When the head part 120 also includes a side surface, the side surface of the head part 120 may be provided with a hexagonal surface as a fastening means.

Since the details of the body part 110 and the head part 120 of the third embodiment of the present invention are the same as or similar to the body part 110 and the head part 120 of the first and second embodiments described above, Redundant descriptions are omitted.

3.2. Base material for bolting (200)

The base material 200 for bolting may include a base portion 210 and a screw hole 220 . The base portion 210 may extend to an area into which the bolt 100 can be fastened. The screw hole 220 penetrates the surface of the base portion 210 in one direction, and a screw thread through which the bolt 100 is fastened may be provided on an inner circumferential surface.

Since the details of the base portion 210 and the screw hole 220 of the third embodiment of the present invention are the same as or similar to the base portion 210 and the screw hole 220 of the first and second embodiments, Redundant descriptions are omitted.

3.3. A plurality of anchor parts 310

A plurality of anchor parts 310 may be provided on one surface of the head part 120 . The plurality of anchor parts 310 are arranged in a circumferential direction of the outer circumferential surface of the body part 110 and may be spaced apart from each other. The plurality of anchor parts 310 may each have a tip protruding from one surface of the head part 120 to forcibly bind the head part 120 and the base part 210 together.

The plurality of anchor parts 310 are spaced apart from each other in the circumferential direction of the outer circumferential surface of the body part 110 and arranged in a circular line, and each tip is separated from each other by a size greater than 0% and less than 50% of the head part ( 120) may protrude from one side. That is, the protrusion height H of the anchor part 310 may be greater than 0% and less than 50% of the separation distance L of the anchor parts 310 . When the protruding height (H) of the anchor portion 310 exceeds 50% of the separation distance (L) of the anchor portions 310, when the bolt 100 is rotated by the standard tightening angle with an effective tightening torque, the anchor portion It may be difficult to insert the anchor part 310 into the recessed part 410 due to the protruding height H of the 310 .

The plurality of anchor parts 310 are spaced apart from the edge of one surface of the head part 120, spaced apart from each other at an angle within the standard fastening angle with the body part 110 as the center, and each one surface, for example, the lower surface of the head part It may be formed inclined at an angle of 10 ° to 30 ° with respect to one surface of (120). When the plurality of anchor parts 310 are spaced apart from each other at an angle exceeding the standard fastening angle with the body part 110 as the center, while the bolt 100 rotates by the reference fastening angle with an effective fastening torque, the plurality of anchor parts ( 310) may be difficult to sufficiently contact the base material 210 and the depression 410.

When one surface of each of the plurality of anchor parts 310, for example, the lower surface is formed inclined at an angle of less than 10 ° with respect to one surface of the head part 120, the anchor part 310 and the recessed part 410 in the recessed part. ) It may be difficult to sufficiently secure the contact height, and when it is formed inclined at an angle exceeding 30 ° with respect to one surface of the head part 120, the protruding height of the anchor part 310 and the circumference of the anchor part 310 Since the extension length in the direction becomes longer than necessary, resistance due to the anchor unit 310 increases when the bolt rotates, and it may be difficult to rotate the bolt 100 by the standard fastening angle. Meanwhile, the reference fastening angle may be a predetermined angle selected within an angle range of greater than 0° and less than or equal to 30°.

Each of the plurality of anchor parts 310 may have a shape of a right triangle in the shape of a cut surface of the outer circumferential surface of the body part 110 in the circumferential direction.

Since the details of the plurality of anchor units 310 of the third embodiment of the present invention are the same as or similar to those of the plurality of anchor units 130 of the first embodiment described above, overlapping descriptions will be omitted.

3.4. A plurality of depressions (410)

The plurality of depressions 410 may be concavely formed on the surface of the base part 210 so that the plurality of anchor parts 310 may be respectively inserted. The plurality of recessed parts 410 may be provided in the same number as the plurality of anchor parts 310 and may be spaced apart from each other at the same distance as that of the plurality of anchor parts 310 .

Each of the plurality of depressions 410 is a base portion of both edges of a bottom surface connected obliquely to the surface of the base portion 210 of the base material 200 and a bottom surface facing the circumferential direction of the inlet of the screw hole 220. It may include a vertical surface extending upward from a corner at a height lower than the surface of 210 and opposite sides in a radial direction of the inlet of the screw hole 220 and connecting the bottom surface and the vertical surface.

Each of the plurality of recessed parts 410 may be formed in a shape corresponding to the shape of each of the plurality of anchor parts 310, and may be formed in a size that allows each of the plurality of anchor parts 310 to be inserted at an interval. there is.

At this time, since the length of the bottom surface of the recessed portion 410 is longer than the length of one side of the anchor portion 310, each of the plurality of recessed portions 410 is inserted with a plurality of anchor portions 310 spaced apart from each other. It can be formed to a size that allows it to be. Of course, other than this, the structure giving the margin interval may be various.

4. Bolt assembly according to the fourth embodiment of the present invention

7 is an exploded view of a bolt assembly according to a fourth embodiment of the present invention. 8 is a coupling view of a bolt assembly according to a fourth embodiment of the present invention.

7 to 8, the bolt assembly according to the fourth embodiment of the present invention is formed by extending in one direction and having a screw thread on the outer circumferential surface of the body portion 110 and one side coupled to one end of the body portion And, a bolt 100 having a head portion 120 provided with a fastening means on at least one side of the other side facing the one side and the side connected to the one side; A ball having a base portion 210 extending to an area into which the bolt 100 can be fastened, and a screw hole 220 having a screw thread that penetrates the surface of the base portion in one direction and has a screw thread on the inner circumferential surface for fastening the bolt. It is configured to include a base material 200 for ting.

Here, the body part 110 and the head part 120 of the bolt 100 according to the fourth embodiment of the present invention are the body part 110 and the head part of the bolt 100 according to the first embodiment of the present invention. 120, the base portion 210 and the screw hole 220 of the base material 200 for bolting according to the fourth embodiment of the present invention are the base portion 210 according to the second embodiment of the present invention and Since it is the same as the screw hole 220, duplicate descriptions will be omitted below.

In addition, the bolt assembly according to the fourth embodiment of the present invention is provided on the surface of the base part 210, and is arranged in the circumferential direction of the inlet of the screw hole 220, and the head part 120 and the base part 210 ) on one surface of the head part 120 so that the plurality of anchor parts 320 each having a tip protruding from the surface of the base part 210 to forcibly bind the plurality of anchor parts 320 to be inserted. It may be configured to include a plurality of depressions 420 formed concavely.

Each one surface of the plurality of anchor parts 320 may be formed to be inclined at a predetermined angle in the tightening direction with respect to the surface of the base material. Accordingly, after bolting the bolt to the base material, the vertical surface connected to the tip of the anchor unit contacts the vertical surface of the recessed unit, thereby effectively preventing loosening.

In addition, one surface of each of the plurality of anchor parts 320 may be formed to be inclined at a predetermined angle in the loosening direction with respect to the surface of the base material. In this case, the anchor portion 320 may be smoothly inserted into the recessed portion 420 .

Here, the plurality of anchor parts 320 are spaced apart from each other in the circumferential direction of the inlet of the screw hole 220 and arranged in a circular line, and each tip is at the base by a size greater than 0% and less than 50% of the distance between each other. It may protrude from the surface of portion 210 .

In addition, the plurality of anchor parts 320 may be spaced apart from the edge of one surface of the head part 120 and the outer circumferential surface of the body part 110 when the bolt 100 and the bolt base material 200 are coupled. In addition, the plurality of anchor parts 320 are spaced apart from each other at an angle within the standard fastening angle centered on the screw hole 220, and each other surface, for example, the upper surface is 10 ° to 30 ° to the surface of the base part 210. It may be formed inclined at an angle of °. Meanwhile, the reference fastening angle may be selected within an angle range of greater than 0° and less than or equal to 30°. In addition, each of the plurality of anchor portions 320 may have a shape of a right triangle when cut in the circumferential direction of the inlet of the screw hole 220 .

Contents of the anchor unit 320 according to the fourth embodiment of the present invention are the same as or similar to those of the anchor unit 230 according to the above-described second embodiment of the present invention, so duplicate descriptions are omitted.

The plurality of depressions 420 may be concavely formed on one surface of the head part 120 to accommodate the plurality of anchor parts 320 when the bolt 100 and the base material 200 for bolting are coupled. Each of these plurality of recessed parts 420 is formed in a shape corresponding to the shape of each of the plurality of anchor parts 320, and is formed in a size so that each of the plurality of anchor parts 320 can be inserted at an interval. can

Since the contents of the recessed part 420 according to the fourth embodiment of the present invention are the same as or similar to the contents of the recessed part 410 according to the third embodiment of the present invention, overlapping descriptions are omitted.

The above embodiments of the present invention are for illustration of the present invention and are not intended to limit the present invention. It should be noted that the configurations and methods disclosed in the above embodiments of the present invention may be combined and modified in various forms by combining or crossing each other, and variations thereof may also be considered within the scope of the present invention. That is, the present invention will be implemented in a variety of different forms within the scope of the claims and equivalent technical ideas, and various embodiments are possible within the scope of the technical idea of the present invention by those skilled in the art to which the present invention pertains. will be able to understand

100: bolt
200: base material for bolting
130, 310, 320: anchor part
230, 410, 420: depression

Claims (14)

As a bolt that can be bolted to the base material,
A body portion extending in one direction so that one end thereof faces the base material and having a screw thread on an outer circumferential surface thereof;
a head part having one surface coupled to the other end of the body part and having a fastening means provided on at least one of the other surface facing the one surface and the side surface connected to the one surface;
A plurality of anchor parts provided on one surface of the head part, arranged in a circumferential direction of the outer circumferential surface of the body part, and each having a tip in a direction toward the surface of the base material to forcibly bind the head part to the surface of the base material; composed of, including
The bolt characterized in that the anchor portion is formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base material from the tip. The method of claim 1,
A bolt, characterized in that one surface of each of the plurality of anchor portions is inclined at an angle of 10 ° to 30 ° with respect to the surface of the base material. The method of claim 2,
The direction in which the thread of the body part rotates to be screwed into the screw hole of the base material is called a tightening direction,
A bolt, characterized in that one surface of each of the plurality of anchor portions is formed to be inclined at a predetermined angle in the tightening direction with respect to the surface of the base material. The method of claim 2,
The direction in which the thread of the body part rotates to be released from the screw hole of the base material is called the loosening direction,
A bolt, characterized in that one surface of each of the plurality of anchor portions is formed to be inclined at a predetermined angle in the loosening direction with respect to the surface of the base material. According to any one of claims 1 to 4,
The plurality of anchor parts are spaced apart from each other at equal intervals in the circumferential direction of the outer circumferential surface of the body part and arranged in a circular line, and each tip protrudes from one surface of the head part by an amount of more than 0% and less than 50% of the distance between them. A bolt characterized in that it becomes. The method of claim 5,
The plurality of anchor parts are bolts, characterized in that spaced apart from each other at an angle within a reference fastening angle with respect to the body part. The method of claim 6,
The bolt, characterized in that the reference fastening angle is a predetermined angle selected within an angle range of more than 0 ° and less than 30 °. The method of claim 2,
The inclined surface of each of the plurality of anchor portions includes a plurality of sides,
The plurality of sides include first and second sides opposing each other in the circumferential direction, and third and fourth sides opposing each other in a direction crossing the circumferential direction,
The bolt characterized in that the first side is located on one surface of the head portion, and the third side and the fourth side are inclined at an angle of 10 ° to 30 ° with respect to one surface of the head portion, so that the second side becomes a tip. . The method of claim 5,
The plurality of anchor portions are bolts, characterized in that spaced apart from an edge of one surface of the head portion and an outer circumferential surface of the body portion in a radial direction of the outer circumferential surface of the body portion. The method of claim 1,
A bolt characterized in that some of the plurality of anchor parts include a material having greater ductility than the material of the base material, and others include a material having less ductility than the material of the base material. As a bolting base material capable of fastening bolts,
a base portion extending into an area into which the bolt can be fastened;
a screw hole that penetrates the surface of the base part in one direction and has a screw thread on an inner circumferential surface for fastening the bolt;
a plurality of anchor parts provided on a surface of the base part, arranged in a circumferential direction of the inlet of the screw hole, and each having a tip protruding from the surface of the base part to forcibly bind the head of the bolt to the surface of the base part; It is composed of,
The base material for bolting, characterized in that the anchor portion is formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base portion from the tip. A body portion extending in one direction and provided with a screw thread on an outer circumferential surface, one surface coupled to the other end of the body portion, and a head having fastening means provided on at least one of the other surface facing the one surface and the side surface connected to the one surface. A bolt having a portion;
A base material for bolting having a base portion extending into an area into which the bolt can be fastened, and a screw hole that penetrates the surface of the base portion in one direction and has a screw thread on an inner circumferential surface for fastening the bolt;
It is provided on one surface of the head part or a surface of the base part, and is arranged in a circumferential direction of an outer circumferential surface of the body part or in a circumferential direction of an inlet of the screw hole, and one surface of the head part or the base part is forcibly coupled to the head part and the base part. A plurality of anchor parts each having a tip protruding from the surface of the part;
A plurality of recessed portions formed concavely on a surface of the base portion or one surface of the head portion so that the plurality of anchor portions can be inserted, respectively;
The bolt assembly, characterized in that the anchor portion is formed to be inclined at a predetermined angle in the same direction with respect to the surface of the base portion from the tip. The method of claim 12,
The plurality of anchor units,
Spaced apart from each other at equal intervals in the circumferential direction of the outer circumferential surface of the body part or in the circumferential direction of the inlet of the screw hole, and arranged in a circular row, each tip of one side of the head part by a size greater than 0% and less than 50% of the distance between each other, or It protrudes from the surface of the base part,
It is spaced apart from the edge of one side of the head portion and the outer circumferential surface of the body portion, and is spaced apart from each other at an angle within a standard fastening angle centered on the body portion or the screw hole, and each one side or the other side is one side of the head portion or the base portion It is formed inclined at an angle of 10 ° to 30 ° with respect to the surface,
The reference fastening angle is a bolt assembly, characterized in that selected within the angle range of more than 0 ° and less than 30 °. The method of claim 12,
In each of the plurality of anchor portions, the shape of a cut surface in the circumferential direction of the outer circumferential surface of the body portion or in the circumferential direction of the inlet of the screw hole is a right triangle shape,
Each of the plurality of recessed parts is formed in a shape corresponding to the shape of each of the plurality of anchor parts, and is formed in a size so that each of the plurality of anchor parts can be inserted at an interval.

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