TWM644127U - Multi-diameter screw - Google Patents

Abstract

One is especially suitable for drilling and screwing composite materials such as thin iron plates and thin iron plates or thin iron plates and wood, and has the ability to fasten the screws without idling when locked on the thin iron plates, and can effectively produce a very flat screw head ( Slightly sinking) Multi-diameter screws with improved practical functions such as reducing the protrusion on the surface of the work object. The screw body includes a screw head, a screw neck connected under the screw head, a screw shank connected under the screw neck, and a screw body arranged on the screw head. The spiral thread of the rod body, wherein: the screw rod body from the bottom of the screw neck to the tail end of the screw rod body has at least three different rod outer diameters, at least one of which has a tapered rod whose outer diameter is larger at the top and smaller at the bottom Shaped rod body, at least one section of the rod body has a straight rod-shaped rod body with the same outer diameter up and down, and a tapered screw tail located at the last section of the screw rod body, and maintains the helical thread of the first circle under the screw neck. The outer diameter is the maximum outer diameter of the helical thread.

Description

Multi-diameter screw

One is especially suitable for drilling and screwing composite materials such as thin iron plates and thin iron plates or thin iron plates and wood, and has the ability to fasten the screws without idling when locked on the thin iron plates, and can effectively produce a very flat screw head ( Slight sinking) Multi-diameter screws that improve practical functions such as reducing protrusion on the surface of the work object.

It is generally known that in the structural design of drill tail screws with drilling and screwing, all strive to improve chip removal efficiency, rapid drilling efficiency, and practical screwing efficiency, so different technical creative thinking produces different structures. The performance of results and benefits, but for drilling screws that require drilling and screwing, in addition to striving for the improvement of chip removal efficiency, rapid drilling benefits and practical screwing performance, for materials of different materials Or the practicability of screwing in and screwing more than one composite material material requires continuous improvement and improvement in order to seek the advancement and practicability of the drilling screw in structure and locking performance.

However, in the related known screw structure design, there is a problem that the screw is easy to spin when it is locked on a thin iron plate and is not fastened, and the screw head cannot be reliably and effectively attached to the surface of the work object without protruding.

The purpose of creating the "multi-diameter screw" in this case is to:

1. To provide a drilling screw especially suitable for composite materials such as thin iron plates and thin iron plates or thin iron plates and wood. It is also equipped with screws that are fastened without idling when the screw is locked on a thin iron plate, and can effectively produce a screw with a very flat (slightly sinking) screw head and a reduced protrusion on the surface of the work object, etc. to improve practical functions.

2. Provide a screw structure with low screw-in torque and high tight locking effect.

3. Provide an advanced and practical screw structure to improve the industrial utilization and economic benefits of the screw.

Its creative characteristics are:

The screw body includes a screw head, a screw neck connected under the screw head, a screw body connected under the screw neck, and a helical thread arranged on the screw body; wherein:

The screw shank between the bottom of the screw neck and the tail end of the screw shank has at least three sections of different shank outer diameters, wherein the outer diameter of the section of shank connected to the bottom of the screw neck is a tapered rod with a larger upper part and a smaller lower part Body, the first circle of helical thread of the tapered rod body maintains the maximum outer diameter of the helical thread below the screw neck;

The helical thread provided on the screw body can be a single thread or multiple threads above a single thread;

The screw shank between the bottom of the screw neck and the tail end of the screw shank has at least three sections of different shank outer diameters, wherein the outer diameter of the section of shank connected to the bottom of the screw neck is a tapered rod with a larger upper part and a smaller lower part body, and the outside diameter of the rod connected under the tapered rod-shaped rod body is a straight rod-shaped rod body with the same upper and lower diameters;

The screw shank has at least one section of the shank whose outer diameter is a tapered shank whose upper part is larger and the lower part is smaller, at least one section of the shank whose outer diameter is a straight shank with the same upper and lower diameters, and a cone located at the most tail section of the screw shank. shaped screw tail;

Between the lower peripheral edge of the screw head and the screw neck is a conical annular surface with a larger outer diameter and a smaller lower one. The conical annular surface has at least one cutting tooth with the unidirectional tooth edge facing downward.

1: screw head

11: Tapered torus

12: Chip teeth

121: tooth blade

2: screw neck

3: Screw body

31: tapered rod body

32: straight rod body

33: Tapered screw tail

4: spiral thread

41: The first circle of spiral thread

42: Maximum outer diameter

Figure 1: Stereoscopic view of the creation embodiment of this case.

Figure 2: Front view of the creation embodiment of this case.

Figure 3: Top view of Figure 2.

Figure 4: Section A-A of Figure 2.

Figure 5: B-B sectional view of Figure 3.

Please refer to the embodiment shown in Fig. 1 and Fig. 2 , the screw body in this embodiment includes: a screw head 1, a screw neck 2 connected under the screw head 1, and a screw shank connected under the screw neck 2 3 and the helical thread 4 arranged on the screw body 3 (the helical thread can be used as a single thread or more than one thread).

As shown in the figure, the screw body 3 between the bottom of the screw neck 2 and the tail end of the screw body has at least three sections with different outer diameters (the description of this case takes three sections as an example), wherein the connection between the screw neck 2 The outer diameter of this joint rod body below is a tapered rod-shaped rod body 31 with a large upper part and a smaller lower part. The outer diameter of another joint rod body below the tapered rod-shaped rod body 31 is a straight rod-shaped rod body 32 with the same up and down. The rod body below the straight rod-shaped rod body 32 is the tapered screw tail 33 of the last section.

As shown in Fig. 1, Fig. 2 and Fig. 5, the outer diameter of the joint rod body connected to the bottom of the screw neck 2 is a tapered rod-shaped rod body 31 with a large upper part and a smaller lower part. The turn of the helical thread 41 maintains the maximum outer diameter 42 of the helical thread 4 located below the screw neck 2 .

As shown in Fig. 1, Fig. 2 and Fig. 4, between the lower peripheral edge of the screw head 1 and the screw neck 2 is a tapered ring surface 11 with a large outer diameter and a small bottom, and the tapered ring surface 11 has at least one The cutting tooth 12 with the one-way tooth edge 121 facing downward.

The above-described embodiments are only preferred embodiments for fully explaining the creation of this case, and the scope of protection of the creation of this case is not limited thereto. Those skilled in the art may make equivalent substitutions or transformations based on the creation of this case. They are all within the scope of protection of the creation of this case, and are hereby declared.

Based on the above, the creation of the screw structure in this case can indeed achieve the following progressive practical purposes and effects:

1. It can indeed provide a kind of drilling and screwing, especially suitable for composite materials such as thin iron plate and thin iron plate or thin iron plate and wood, and has the ability to fasten the screw when it is locked on the thin iron plate without idling, and can effectively produce The screw head is very flat (slightly sunken) on the surface of the work object, reducing protrusion and improving practical effect.

2. It can indeed achieve the effect of providing a low screw-in torque and high tight locking.

3. It can indeed provide an advanced and practical screw structure, and effectively improve the industrial utilization and economic benefits of the screw.

1: screw head

12: Chip teeth

3: Screw body

31: tapered rod body

32: straight rod body

33: Tapered screw tail

4: spiral thread

41: The first circle of spiral thread

Claims (6)

A multi-diameter screw, the screw body includes a screw head, a screw neck connected under the screw head, a screw body connected under the screw neck, and a helical thread arranged on the screw body; it is characterized in that: the screw neck is The screw shank between the tail end of the screw shank has at least three sections with different shank outer diameters, wherein the first turn of the helical thread of the section of the shank below the screw neck maintains the helical thread below the screw neck maximum outer diameter. According to the multi-diameter screw described in item 1 of the scope of the patent application, the outer diameter of the section of the rod connected to the bottom of the screw neck is a tapered rod with a larger top and a smaller bottom. According to the multi-diameter screw described in item 1 of the scope of the patent application, the helical thread provided on the screw body can be a single thread or more than a single thread. According to the multi-diameter screw described in item 1 of the scope of the patent application, the screw shank connected under the screw neck has at least three different shank outer diameters, and the outer diameter of at least one shank is in the shape of a tapered rod with a larger top and a smaller bottom. The outer diameter of at least one section of the rod body is a straight rod-shaped rod body with the same upper and lower diameters, and a tapered screw tail located at the last section of the screw rod body. According to the multi-diameter screw described in item 1 of the scope of the patent application, the outer diameter of the rod connected under the tapered rod-shaped rod body is a straight rod-shaped rod body with the same upper and lower diameters. According to the multi-diameter screw described in item 1 of the scope of the patent application, there is a tapered ring surface with a larger outer diameter and a smaller outer diameter between the lower peripheral edge of the screw head and the screw neck, and the tapered ring surface has at least one unidirectional Chipping teeth facing downwards.

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