TWI419766B - Polygonal wrench - Google Patents

Description

Polygonal wrench

The invention relates to hand tools, and in particular to a polygonal wrench.

Objects such as bolts and screws are usually used for coupling or fastening in mechanical structures or building components, and in mechanical parts are classified as fasteners. According to the shape of the head, it can also be divided into a word, a cross, a plum, a four-corner, a hexagon, etc., and is generally called a polygon. When operating, when the force is too large, it will cause damage to the head. When the head is broken, it is difficult to lock or loosen with a suitable tool.

The reason is that to operate a tight body with a polygonal shape on the head (for example, a bolt), a wrench with a matching shape must be used. The wrench applies a force to the sides of the polygon of the bolt head to push the bolt to rotate. Therefore, when the edge of the polygon of the head is broken (for example, worn), that is, using a wrench having a shape conforming, it is difficult to apply force to the head. The bolt cannot be operated.

One aspect of the present invention provides a polygonal wrench for connecting a polygonal wrench to a bolt. Even if the head of the bolt is broken, it can be operated.

According to an embodiment of the invention, a polygonal wrench includes a rod body, a polygonal column, an external thread, and an internal thread. One end of the rod body includes a conical portion. The polygonal column includes a hole, a mouth, and a force receiving portion. The hole is located at one end of the polygonal column to accommodate the conical portion of the shaft. The two force portions are located at the bottom of the holes and are opposite each other. The two force portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole. The slit is located between the two force receiving portions such that the hole is open to the other end of the polygonal column and to the outside thereof. The external thread is placed outside the shaft. The internal thread is placed inside the hole of the polygonal column. The internal thread engages with the external thread. The thread directions of both the external thread and the internal thread are both one of a left thread or a right thread.

According to another embodiment of the present invention, a polygonal wrench includes a rod body, a polygonal column, and at least one slide rail. One end of the rod body includes a conical portion. The polygonal column includes a hole, a mouth, and a force receiving portion. The hole is located at one end of the polygonal column to accommodate the conical portion of the shaft. The two force portions are located at the bottom of the holes and are opposite each other. The two force portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole. The slit is located between the two force receiving portions such that the hole is open to the other end of the polygonal column and to the outside thereof. The slide rail includes a track and a slider, one of the track and the slider is disposed outside the pole body, and the other is disposed inside the hole. The slider is set on the track. Both the track and the slider are inclined downwardly from one of the left to right or right to left directions of the shaft.

FIG. 1 is a perspective view of a polygonal wrench according to an embodiment of the present invention. Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1. As shown, the polygonal wrench includes a rod 100, a polygonal column 200, an external thread 300, and an internal thread 400. One end of the rod 100 includes a conical portion 110. The polygonal column 200 includes a hole 210, a port 220, and two force receiving portions 230. The hole 210 is located at one end of the polygonal column 200 for receiving the conical portion 110 of the rod body 100. The two force receiving portions 230 are located at the bottom of the hole 210 and opposed to each other. The two force receiving portions 230 are opposed to the conical portion 110. The slit 220 is opened in the polygonal column 200 and communicates with the hole 210. The slit 220 is located between the two force receiving portions 230 such that the hole 210 is opened to the other end of the polygonal column 200 and the outside thereof. The external thread 300 is disposed outside the rod 100. The internal thread 400 is disposed inside the hole 210 of the polygonal column 200. The internal thread 400 meshes with the external thread 300. The thread directions of both the external thread 300 and the internal thread 400 are both one of a left thread or a right thread.

The aforementioned "polygon" refers to a closed shape composed of a finite line segment of a number greater than 2, and which is connected end to end. Since the shape of the bolt head is various, for example, plum, square, hexagon, etc. described in the prior art, it is collectively referred to as a polygon. The technique of the present invention can achieve the effect by using the same shape corresponding to the shape of the bolt head. Therefore, the detailed shape is not a technical feature of the present invention, as long as the polygon can correspond to the shape of the bolt head.

In the above-mentioned "the other end of the polygonal column 200 and its outer side", the axial surface of the polygonal column 200 is the end, and the radial surface is the outer side. In other words, "opening the hole 210 to the other end of the polygonal column 200 and its outer side" means that the hole 210 is open to the axial end of the polygonal column 200, and is also open to the outer side in the radial direction of the polygonal column 200.

The above-mentioned "left thread" means that the thread is inclined from left to right as viewed from the side. Simply put, the thread is viewed from the side, and if the thread is gradually downward from left to right, it is "left thread", also known as "left tooth". On the other hand, when the side view of the thread is tilted from right to left, it is "right thread", also known as "right tooth". The general thread is dominated by the right thread, which is due to the initial design of the right hand. When the thread is a right thread, the clockwise rotation is screwed, and the counterclockwise rotation is loose; conversely, the clockwise rotation of the left thread is loose, and the counterclockwise rotation is screwed. In the present embodiment, the external thread 300 and the internal thread 400 are both left-hand threads as an example.

FIG. 3 is a cross-sectional view showing the operation of the rod 100 and the polygonal column 200 of FIG. 2 . Rotating the rod 100 counterclockwise, using the external thread 300 and the internal thread 400, causes the rod 100 to move into the polygonal column 200. Fig. 4 is a cross-sectional view showing the enlarged slit 220 of Fig. 3. When the conical portion 110 of the rod 100 contacts the two force receiving portions 230 of the polygonal column 200 and continues to move the rod 100 into the polygonal column 200, the conical portion 110 pushes the two force receiving portions 230 to radially outward displacement. As such, the slit 220 is enlarged and the outer edge of the polygonal column 200 is also expanded.

The outer edge of the expanded polygonal column 200 is supported by the polygon of the bolt head inside, and the bolt can be rotated. Even if the polygon of the bolt head has been broken, since the outer edge of the polygonal column 200 is the inner side of the polygon that supports the head bolt head outward, the force of the polygonal column 200 can be surely transmitted to the bolt head to allow the bolt to rotate.

Moreover, when the external thread 300 and the internal thread 400 on the rod 100 and the polygonal column 200 are left-handed, the bolt is a right-hand thread, and the rod 100 is rotated counterclockwise to tighten the rod 100 and the polygonal column 200. Will loosen the bolts. So designed, as long as the rod 100 is rotated counterclockwise in one direction, the force of the polygonal column 200 can be transmitted to the bolt to loosen the bolt. On the other hand, when the external thread 300 and the internal thread 400 on the rod 100 and the polygonal column 200 are right-handed, and the bolt is left-threaded, the rod 100 can be rotated clockwise to achieve the same effect.

Fig. 5 is a cross-sectional view showing a polygonal wrench according to another embodiment of the present invention. The polygonal wrench of Fig. 5 is substantially the same as the polygonal wrench of Fig. 1, except that the polygonal wrench of Fig. 5 employs a T-shaped grip T to facilitate quick operation by the user. Further, the polygonal wrench of FIG. 5 replaces the external thread 300 and the internal thread 400 with the slide rail 500. That is to say, the rod 100 is identical in technology to the polygonal column 200. The technical features of the slide rail 500 are described below. The slide rail 500 includes a rail 510 and a slider 520. One of the rail 510 and the slider 520 is disposed outside the rod 100, and the other is disposed inside the hole 210. A slider 520 is disposed on the track 510. Both the track 510 and the slider 520 are inclined downwardly from one of left to right or right to left of the rod 100.

The aforementioned "inclined downward from left to right" means that the rod body 100 or the hole 210 is viewed from the side, and the rail 510 and the slider 520 are gradually downward from left to right. The effect of this feature is the same as that of the aforementioned left thread. When rotating counterclockwise, the rod 100 and the polygonal column 200 can be tightened to loosen the bolt. On the contrary, "extending obliquely from right to left" means that the rod body 100 or the hole 210 is viewed from the side, and the rail 510 and the slider 520 are gradually descended from right to left. The effect of this feature is the same as the effect of the right thread. When rotating clockwise, the rod 100 and the polygonal column 200 can be screwed together to loosen the bolt. In the present embodiment, the rail 510 and the slider 520 are both inclined from the left to the right of the rod 100 to extend as an example.

And the position where the track 510 and the slider 520 are disposed does not affect the technology of the present invention. The track 510 is disposed outside the rod 100, and the slider 520 is disposed inside the hole 210; or the track 510 is disposed inside the hole 210, and the slider 520 is disposed outside the rod 100, which does not affect the technology of the present invention.

Further, in the above-described polygonal wrench, each of the force receiving portions 230 is a slope. That is to say, when the conical portion 110 of the rod body 100 pushes the two force receiving portions 230, the tapered surface and the inclined surface are pushed into contact with each other. Therefore, the pressure applied to the conical portion 110 can be reduced.

100. . . Rod body

110. . . Cone

200. . . Polygonal column

210. . . hole

220. . . incision

230. . . Force department

T. . . Grip

300. . . External thread

400. . . internal thread

500. . . Slide rail

510. . . track

520. . . Slider

FIG. 1 is a perspective view of a polygonal wrench according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1.

FIG. 3 is a cross-sectional view showing the operation of the rod 100 and the polygonal column 200 of FIG. 2 .

Fig. 4 is a cross-sectional view showing the enlarged slit of Fig. 3.

Fig. 5 is a cross-sectional view showing a polygonal wrench according to another embodiment of the present invention.

100. . . Rod body

110. . . Cone

200. . . Polygonal column

210. . . hole

220. . . incision

300. . . External thread

400. . . internal thread

Claims (10)

A polygonal wrench comprising: a rod body having a conical portion at one end; a polygonal column comprising a hole, at least a plurality of ports, and two force receiving portions, the hole being located at one end of the polygonal column for receiving the cone of the rod body The two force receiving portions are located at the bottom of the hole and opposite to each other, and the two force receiving portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole, and the slit is located between the two force receiving portions. , the hole is open to the other end of the polygonal column and the outer side thereof; an outer left thread is disposed outside the rod body; and an inner left thread is disposed inside the hole of the polygonal column, the inner left thread and the inner thread The outer left thread engages. The polygonal wrench of claim 1, wherein each of the force receiving portions is a slope. The polygonal wrench of claim 1, wherein a T-shaped grip is attached to the upper portion of the rod. A polygonal wrench comprising: a rod body having a conical portion at one end; a polygonal column comprising a hole, at least a plurality of ports, and two force receiving portions, the hole being located at one end of the polygonal column for receiving the cone of the rod body The two force receiving portions are located at the bottom of the hole and opposite to each other, and the two force receiving portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole, and the slit is located between the two force receiving portions. Opening the hole to the other end of the polygonal column and the outside thereof; an outer right thread disposed outside the rod; and an inner right thread disposed inside the hole of the polygonal column, the inner right thread and the The outer right thread is engaged. The polygonal wrench of claim 4, wherein each of the force receiving portions is a slope. A polygonal wrench comprising: a rod body having a conical portion at one end; a polygonal column comprising a hole, at least a plurality of ports, and two force receiving portions, the hole being located at one end of the polygonal column for receiving the cone of the rod body The two force receiving portions are located at the bottom of the hole and opposite to each other, and the two force receiving portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole, and the slit is located between the two force receiving portions. Opening the hole to the other end of the polygonal column and the outer side thereof; and at least one sliding rail, the sliding rail includes a track and a slider, and one of the track and the slider is disposed outside the rod body, and One is disposed inside the hole, and the slider is disposed on the track, and the track and the slider are both inclined downward from the left to the right of the rod. The polygonal wrench of claim 6, wherein each of the force receiving portions is a slope. A polygonal wrench comprising: a rod body having a conical portion at one end; a polygonal column comprising a hole, at least a plurality of ports, and two force receiving portions, the hole being located at one end of the polygonal column for receiving the cone of the rod body The two force receiving portions are located at the bottom of the hole and opposite to each other, and the two force receiving portions are opposite to the cone portion. The slit is opened in the polygonal column and communicates with the hole, and the slit is located between the two force receiving portions. Opening the hole to the other end of the polygonal column and the outer side thereof; and at least one sliding rail, the sliding rail includes a track and a slider, and one of the track and the slider is disposed outside the rod body, and One is disposed inside the hole, and the slider is disposed on the track, and the track and the slider are both inclined downward from the right to the left of the rod. The polygonal wrench of claim 8, wherein each of the force receiving portions is a slope. The polygonal wrench of claim 8, wherein a T-shaped grip is attached to the upper portion of the rod.