CN201763747U - screw - Google Patents

Abstract

A screw comprises a screw head and a screw rod, wherein one end of the screw head is connected with the screw head, the screw head is provided with a head body which defines a tool slot, the tool slot is provided with a polygonal slot part, four short slot parts which are arranged on the periphery of the polygonal slot part at equal angles at intervals and are communicated with the polygonal slot part, and two long slot parts which respectively extend to the peripheral surface of the head body from two opposite short slot parts in a reverse mode, and the screw rod is provided with at least one chip removal groove. The structure of the tool slot is suitable for the insertion and fixation of a polygonal, cross or straight screwdriver head, and the structure of the chip removal groove enables the whole tool slot to have the effects of wide applicability, simple and convenient use and the like.

Description

screw

technical field

The utility model relates to a screw, in particular to a screw which is applicable to various shapes of screwdriver heads and has the function of chip removal.

Background technique

When performing locking operations, the appropriate screwdriver bit must be selected according to the size of the screw. For example, the cross-slotted screw is limited to the cross-shaped screwdriver, the hexagonal-slotted screw is limited to the hexagonal-shaped screwdriver, and the slotted screw is limited to one. Glyph screwdriver bits... etc. Therefore, for the maintenance personnel, the toolbox usually has to be equipped with screwdriver bits of various shapes in order to adapt to the screw specifications of the actual maintenance site and disassemble the screws smoothly. Or assembly, to avoid the embarrassing situation of not being able to work due to incomplete tool specifications, which is really troublesome and inconvenient.

Contents of the invention

The purpose of the utility model is to provide a screwdriver head suitable for polygonal, cross-shaped or straight-shaped screwdrivers, which also has chip removal function, has wide overall applicability and is easy to use.

The screw of the present utility model comprises a screw head and a screw rod connected to the screw head at one end, the screw head has a head body defining a tool slot, the tool slot has a polygonal groove, four etc. The short grooves arranged at the periphery of the polygonal groove at angular intervals and communicated with the polygonal groove, and the two short grooves respectively extending from the facing two short grooves to the peripheral surface of the head body The long fluted portion of the screw has at least one flute.

In the screw described in the utility model, the polygonal groove is square.

In the screw described in the present invention, the short grooves respectively extend outward from the four corners of the polygonal groove, and are respectively located on two diagonals of the polygonal groove.

For the screw described in the utility model, the number of the chip removal grooves is not more than four.

In the screw described in the present invention, the chip removal groove extends straight from the other end of the screw rod to the direction of the screw head.

For the screw described in the utility model, the cross-sectional shape of the screw rod is an equilateral triangle with rounded corners.

In the screw described in the present invention, the screw rod has an average-diameter section, one end of which is connected to the screw head, and a reduced-diameter section axially extending from the other end of the average-diameter section and having a tapered outer diameter.

The beneficial effect of the utility model is that: through the structure of the tool slot, it is suitable for fixing polygonal, cross-shaped or inline screwdriver heads, and the structure of the chip removal groove makes the overall production wide applicability and easy to use and other effects.

Description of drawings

Fig. 1 is a top view, illustrating a first preferred embodiment of the screw of the present utility model, the structure of a tool slot;

Fig. 2 is a partial sectional view taken from line II-II of Fig. 1, illustrating the sectional structure of a screw head of the first preferred embodiment;

Fig. 3 is a sectional view taken from line III-III of Fig. 1, illustrating another sectional structure of the screw head of the first preferred embodiment;

Fig. 4 is a plan view illustrating a second preferred embodiment of the screw of the present utility model;

Fig. 5 is a schematic cross-sectional view illustrating the cross-sectional shape of the screw of the second preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.

As shown in Figures 1 to 3, a first preferred embodiment of the screw of the present utility model is a hexagon head screw, comprising a hexagonal screw head 1, and a cylinder whose one end is connected to the screw head 1 Shaped screw 2.

The screw head 1 has a hexagonal head body 11 delimiting a tool socket 12 . The tool socket 12 has a polygonal groove 13, four short grooves 14 arranged at equiangular intervals on the periphery of the polygonal groove 13 and respectively communicating with the four corners of the polygonal groove 13, and two short grooves 14 respectively The two short grooves 14 facing each other extend straight to the long groove 15 on the peripheral surface of the head body 11 in opposite directions; in this embodiment, the polygonal groove 13 is a square, but it can also be is a hexagon (that is, a hexagon).

Specifically, the short grooves 14 respectively extend outward from the four corners of the polygonal groove 13 and are located on two diagonals of the polygonal groove 13, so the part of the polygonal groove 13 It can cooperate with the short groove portion 14 to form a cross-shaped spatial form. In addition, the short groove portion 14 can also be respectively located at the four sides of the polygonal groove portion 13; in addition, the polygonal groove portion 13 The part, the short groove portion 14 and the long groove portion 15 can cooperate to form an inline shape.

Furthermore, the screw 2 has at least one chip removal groove 21. In this preferred embodiment, the number of the chip removal groove 21 is two and symmetrical at 180 degrees. Each chip removal groove 21 is from the other end of the screw rod 2 to the The screw head 1 extends straight in the direction of a rectangle. Of course, the number of chip removal grooves 21 may also be one, three or four, generally the number of chip removal grooves 21 is not more than four, and the shape of the chip removal grooves 21 is not limited thereto.

Therefore, when performing locking operation, the structure of the tool slot 12 is used to make the screw suitable for screwdriver bits of various shapes, for example, a square or hexagonal screwdriver bit can be inserted into the polygonal groove 13 A cross-shaped screwdriver bit can be inserted into the cross-shaped space formed by the polygonal groove 13 and the short groove 14, while a straight screwdriver bit can be inserted into the polygonal groove 13, the In the inline space formed by the short groove portion 14 and the long groove portion 15 . Therefore, the structure of the tool slot 12 utilizing the screw of the present invention can be applied to various shapes of screwdriver bits such as square, hexagonal, cross or straight, etc., has wide applicability, and can improve the simplicity of operation and use. . Moreover, the structure of the chip removal groove 21 of the screw can eliminate the debris generated in the screwing process (such as tapping), reduce the locking resistance, and improve the locking efficiency.

As shown in Figure 4 and Figure 5, it is a second preferred embodiment of the screw of the present utility model, the difference from the above-mentioned first preferred embodiment is that the cross-sectional shape of the screw rod 3 is about a regular triangle with rounded corners , Moreover, the screw rod 3 also has a triangular prism-shaped mean diameter section 31 whose one end is connected to the screw head 1, and a truncated triangular cone extending axially from the other end of the mean diameter section 31 and having a tapered outer diameter. In this embodiment, an imaginary straight line L1 passing through the helix of the average diameter section 31 and extending along the length direction of the average diameter section 31, and passing through the helix of the diameter reducing section 32 along the An imaginary straight line L2 extending in the length direction of the diameter-reducing section 32, the angle θ between the two is 20 degrees; moreover, the number of chip removal grooves 33 of the screw 3 is three, which are respectively located in the diameter-reducing section 32 At the three rounded corners, only one of the chip removal grooves 33 is shown in FIG. 4 due to the viewing angle. Therefore, through the above structure, the overall locking efficiency of the screw is further improved.

Claims (7)

1. a screw comprises a spiral shell head, and one end connects the screw rod of this spiral shell head, and this spiral shell head has a body that defines an instrument slot; It is characterized in that: this instrument slot has a polygonal slot part, four equi-angularly spaces are arranged in the periphery of this polygonal slot part and the short groove portion that is connected with this polygonal slot part, and two long groove portions that oppositely extend to the side face of this body respectively from wherein two short groove portions of facing mutually, this screw rod has at least one chip removal ditch.

2. screw according to claim 1 is characterized in that: this polygonal slot part is a square.

3. screw according to claim 2 is characterized in that: described short groove portion stretches out from four corners of this polygonal slot part respectively, and lays respectively on two diagonal of this polygonal slot part.

4. screw according to claim 1 is characterized in that: the quantity of described chip removal ditch is not more than four.

5. according to the described screw of arbitrary claim in the claim 1 to 4, it is characterized in that: described chip removal ditch from the other end of this screw rod toward this spiral shell head direction directly to extension.

6. screw according to claim 5 is characterized in that: the section configuration of this screw rod is the fillet equilateral triangle.

7. screw according to claim 6 is characterized in that: this screw rod has all footpath sections that an one end connects this spiral shell head, and one from this all the other end of footpath section extend axially and the undergauge section of external diameter convergent.

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