CN215333891U

CN215333891U - Board anti-cracking embedded screw

Info

Publication number: CN215333891U
Application number: CN202023061260.XU
Authority: CN
Inventors: 吴洪华
Original assignee: Hangzhou Anpo Home Furnishing Co ltd
Current assignee: Hangzhou Anpo Home Furnishing Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-12-28
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses a pre-embedded screw for preventing a wood board from cracking, which comprises a screw sleeve and a hexagonal screw, wherein the screw sleeve comprises an upper part and a lower part, the inner side of the upper part is provided with a thread, the inner side of the lower part is provided with a hexagonal groove for fixing the hexagonal screw, and the bottom of the screw sleeve is provided with a limiting part for blocking the hexagonal screw. Arrange the screw sleeve in the inslot of plank earlier, later realize the location of hexagonal screw through spacing hole, mention the screw sleeve after screwing in plank part again and make up hexagonal screw and screw sleeve, make things convenient for the intermediate position in hexagonal screw precession plank groove, because the screw of directly fixing great bore on the plank can prop bad plank, so fix into the plank with the screw sleeve with the less hexagonal screw of bore earlier, later the screw of great bore through the threaded connection on screw sleeve upper portion later, thereby prevent effectively that the plank from receiving too big extrusion and leading to the fracture.

Description

Board anti-cracking embedded screw

Technical Field

The utility model relates to the technical field of screws, in particular to a crack-proof embedded screw for a wood board.

Background

The screw is indispensable industry requisite in daily life: extremely small screws used for cameras, glasses, clocks, electronics, and the like; general screws for televisions, electric appliances, musical instruments, furniture, and the like; large screws and nuts are used for engineering, buildings and bridges; transportation equipment, airplanes, trams, automobiles and the like are used by using large and small screws, however, when the screws are used on some thinner wood boards, the situation that the wood boards are extruded and cracked when the ends of the screws are just screwed into the wood boards often occurs.

For example, chinese patent CN210919725U, published 2020, 7 and 3, discloses a self-tapping screw for plastic and wood boards, which comprises a screw head, a screw connecting portion, and a screw tail, which are connected in sequence; the head of the screw is of a conical structure, the screw connecting part is provided with an external thread structure, and the tail of the screw is provided with a cross groove; the conical structure is close to the position of the screw connecting part and is in seamless connection with the starting end of the external thread structure, and the upper end of the external thread structure is a smooth cylindrical surface. The screw tail is provided with a ladder, the ladder is sleeved with a pressing sheet, and the diameter of the pressing sheet is twice of the width of the screw tail. Although it is used for solving the self tapping screw and just has advanced very hard problem when timber or plastics, because the screw head adopts the taper structure to make and looks for the position accuracy when concrete operation, easily fixes a position, sets up the convenient messenger power when the pressing sheet that makes the screw installation in the screw afterbody. But it does not consider the plank that the thickness that often uses in daily life is not high, and these planks often appear in the contact department of screw embedding in-process screw thread and panel when fixing through the screw, can be toward crowded propping outward to can prop the edge of bad panel very easily, reduce the life's of panel the condition.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the edge of a board is broken by the aid of the existing screws in the process of embedding the board, and the board is cracked. The board anti-cracking embedded screw is capable of preventing the board from cracking due to the fact that the edge of the board is not broken in the process of embedding the board.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: the utility model provides a pre-buried screw of plank anti-cracking, includes screw cap and hexagonal screw, the screw cap includes upper portion and lower part, the upper portion inboard is equipped with the screw thread, the lower part inboard is equipped with and is used for fixing the hexagon recess of hexagonal screw, the bottom of screw cap is equipped with and is used for blockking the spacing portion of hexagonal screw. The plank anti-cracking embedded screw comprises two parts, namely a screw sleeve and a hexagonal screw, wherein the hexagonal screw penetrates through the upper part of the screw sleeve, a screw rod of the hexagonal screw penetrates through a limiting hole in the middle of the limiting part, a nut of the hexagonal screw is clamped in the inner side of the limiting part and a hexagonal groove, then a groove with the same size as the screw sleeve is formed in a plank to be penetrated firstly, the hexagonal screw and the screw sleeve extend into the groove formed in the plank, the hexagonal screw is screwed into the bottom of the groove of the plank, the hexagonal screw and the screw sleeve are both fixed on the plank, the screw sleeve can be arranged in the hole firstly through the screw thread on the upper part of the screw sleeve, then the positioning of the hexagonal screw is realized through the limiting hole, the hexagonal screw is screwed into one part of the plank, then the screw sleeve is lifted to combine the hexagonal screw and the screw sleeve, the hexagonal screw is convenient to be screwed into the middle position of the groove of the plank, and the larger-caliber screw directly fixed on the plank can support the damaged plank, therefore, the hexagonal screw with the smaller caliber and the screw sleeve are firstly fixed into the wood board and then connected with the screw with the larger caliber through the thread on the upper part of the screw sleeve, so that the cracking of the wood board caused by overlarge extrusion is effectively prevented.

Preferably, a limiting hole for the threaded rod of the hexagonal screw to pass through is formed in the middle of the limiting part. The screw sleeve can be stretched out of the screw rod portion of the hexagonal screw through the limiting hole of the limiting portion, the nut of the hexagonal screw is clamped in the screw sleeve, and therefore the screw sleeve can be prevented from falling outwards after the hexagonal screw is screwed into the wood board.

Preferably, the top of the nut of the hexagonal screw is provided with a rotating groove for screwing. A rotating groove for screwing is formed in the top of the nut of the hexagonal screw, so that the hexagonal screw can be screwed by a screwdriver after passing through the screw sleeve.

Preferably, the rotation groove is cross-shaped. The common screw driver has a straight shape and a cross shape, and the cross-shaped rotating groove is more convenient to be matched with the screw driver to rotate.

Preferably, the upper edge and the lower edge of the outer side of the screw sleeve are both provided with round corners. The screw sleeve is provided with the round angle, so that the collision loss during storage can be reduced, and the screw sleeve is more convenient to be arranged in the groove formed in the wood plate.

Preferably, a protective layer is arranged on the outer side of the screw sleeve. The protective layer is arranged on the outer side of the screw sleeve, so that the screw sleeve can be protected from being damaged in the transportation process, and the strength of the screw sleeve can be increased.

Preferably, the depth of the rotation groove is not more than two thirds of the thickness of the nut of the hexagonal screw. The nut strength of the hexagonal screw is affected by the excessive depth of the rotation groove.

Preferably, the depth of the rotation groove is not less than one third of the thickness of the nut of the hexagonal screw. The depth of the rotating groove is too small, so that the rotating groove is easy to be misplaced with a screwdriver during rotation and is not easy to rotate.

The substantial effects of the utility model are as follows: arrange the screw sleeve in the inslot of plank earlier, later realize the location of hexagonal screw through spacing hole, mention the screw sleeve after screwing in plank part again and make up hexagonal screw and screw sleeve, make things convenient for the intermediate position in hexagonal screw precession plank groove, because the screw of directly fixing great bore on the plank can prop bad plank, so fix into the plank with the screw sleeve with the less hexagonal screw of bore earlier, later the screw of great bore through the threaded connection on screw sleeve upper portion later, thereby prevent effectively that the plank from receiving too big extrusion and leading to the fracture.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view a-a of fig. 1.

Wherein: 1. the screw comprises a screw sleeve, 2 parts of a hexagonal screw, 3 parts of an upper part, 4 parts of a lower part, 5 parts of a limiting part, 6 parts of a limiting hole, 7 parts of a rotating groove, 8 parts of a screw cap.

Detailed Description

The following provides a more detailed description of the present invention, with reference to the accompanying drawings.

The utility model provides a plank prevents pre-buried screw that ftractures, as shown in figure 1, includes screw sleeve 1 and hexagonal screw 2, and screw sleeve 1 includes upper portion 3 and

lower part

4, and 3 inboards on upper portion are equipped with the screw thread, and 4 inboards on lower part are equipped with the hexagon recess that is used for fixed hexagonal screw 2, and as shown in figure 2, the bottom of screw sleeve 1 is equipped with the spacing portion 5 that is used for blockking hexagonal screw 2. The middle of the limiting part 5 is provided with a limiting hole 6 for the threaded rod of the hexagonal screw 2 to pass through. Can stretch out the screw boss 1 with the screw rod portion of hexagonal screw 2 through spacing hole 6 of spacing portion 5, block the nut 8 of hexagonal screw 2 in the screw boss 1, can prevent that the screw boss 1 from outwards droing after the plank is screwed in to hexagonal screw 2 like this. The upper edge and the lower edge of the outer side of the screw sleeve 1 are both provided with round corners. The screw sleeve 1 with the round corners can reduce collision loss during storage, and the screw sleeve 1 is more convenient to be arranged in a groove formed in a wood plate. The outer side of the screw sleeve 1 is provided with a protective layer. The protective layer is arranged on the outer side of the screw sleeve 1, so that the screw sleeve 1 can be protected from being damaged in the transportation process, and the strength of the screw sleeve 1 can be increased.

The top of a nut 8 of the hexagonal screw 2 is provided with a rotating groove 7 for screwing. A rotation groove 7 for screwing is provided at the top of the nut 8 of the hexagonal screw 2, so that the hexagonal screw 2 can be screwed by a screwdriver after the hexagonal screw 2 passes through the boss 1. The rotating groove 7 is cross-shaped. The common screw driver has a straight shape and a cross shape, and the cross-shaped rotating groove 7 is more convenient to be matched with the screw driver to rotate. The depth of the turning groove 7 is not more than two thirds of the thickness of the nut 8 of the hexagonal screw 2. The depth of the rotation groove 7 is too large to affect the strength of the nut 8 of the hexagonal screw 2. The depth of the rotation groove 7 is not less than one third of the thickness of the nut 8 of the hexagonal screw 2. The depth of the rotating groove 7 is too small, so that the rotating groove is easy to be misplaced with a screwdriver during rotation and is not easy to rotate.

The embodiment comprises two parts, namely a screw sleeve 1 and a hexagonal screw 2, wherein the hexagonal screw 2 penetrates through the upper part 3 of the screw sleeve 1, a screw rod of the hexagonal screw 2 penetrates through a limiting hole 6 in the middle of a limiting part 5, a nut 8 of the hexagonal screw 2 is clamped in the inner side of the limiting part 5 and a hexagonal groove, then a groove with the same size as the screw sleeve 1 is firstly formed in a wood plate to be penetrated, then the hexagonal screw 2 and the screw sleeve 1 are extended into the groove formed in the wood plate, the hexagonal screw 2 is screwed into the bottom of the groove of the wood plate, the hexagonal screw 2 and the screw sleeve 1 are both fixed on the wood plate, the screw connected through the thread of the upper part 3 of the screw sleeve 1 can also be used for firstly placing the screw sleeve 1 in the groove of the wood plate, then the positioning of the hexagonal screw 2 is realized through the limiting hole 6, the screw sleeve 1 is lifted after the hexagonal screw 2 is screwed into one part of the wood plate to combine the hexagonal screw sleeve 2 with the screw sleeve 1, make things convenient for hexagonal screw 2 to screw in the intermediate position of plank groove, because the screw of the fixed great bore on the plank directly can prop bad plank, so fix into the plank with the less hexagonal screw 2 of bore together with swivel nut 1 earlier, later through the screw of the great bore after the threaded connection of swivel nut 1 upper portion 3 to prevent effectively that the plank from receiving too big extrusion and leading to the fracture. In addition, the nut 8 of the hexagonal screw 2 can be directly fixed in the hexagonal groove of the lower part 4 of the screw cap 1 for use.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides a pre-buried screw of fracture is prevented to plank, its characterized in that, includes screw sleeve (1) and hexagonal screw (2), screw sleeve (1) includes upper portion (3) and lower part (4), upper portion (3) inboard is equipped with the screw thread, lower part (4) inboard is equipped with and is used for fixing the hexagon groove of hexagonal screw (2), the bottom of screw sleeve (1) is equipped with and is used for blockking spacing portion (5) of hexagonal screw (2).

2. The wood board anti-cracking embedded screw according to claim 1, wherein a limiting hole (6) for a threaded rod of the hexagonal screw (2) to pass through is formed in the middle of the limiting portion (5).

3. The wood board anti-cracking embedded screw as claimed in claim 1 or 2, wherein a rotating groove (7) for screwing is formed in the top of a nut (8) of the hexagonal screw (2).

4. The wood board anti-cracking embedded screw as claimed in claim 3, wherein the rotating groove (7) is cross-shaped.

5. The wood board anti-cracking embedded screw as claimed in claim 1 or 2, wherein the upper edge and the lower edge of the outer side of the screw sleeve (1) are provided with round corners.

6. The wood board anti-cracking embedded screw as claimed in claim 5, wherein a protective layer is arranged on the outer side of the screw sleeve (1).

7. A plank anti-cracking embedded screw according to claim 4, characterized in that the depth of the rotation groove (7) is not more than two thirds of the thickness of the nut (8) of the hexagonal screw (2).

8. The plank anti-cracking embedded screw as claimed in claim 7, wherein the depth of the rotation groove (7) is not less than one third of the thickness of the nut (8) of the hexagonal screw (2).