TWM612677U - Tightening bolt - Google Patents

Abstract

A compression bolt includes a screw head, a screw rod integrally connected to the screw head and extending along an axis, and a screw thread extending continuously on the screw rod. The screw includes a threadless section adjacent to the screw head and a threaded section connected to the threadless section. The diameter of the threaded section along the axis perpendicular to the axis is 12.10-12.40 mm. The thread is formed on the threaded section, and the diameter and width perpendicular to the axis is 15.45-15.75 mm, and the pitch along the axis is 10.00-10.40 mm. By optimizing the parameters of the screw and the thread, the coupling stability of the tightening bolt can be improved.

Description

Tighten the bolt

The new model relates to a screw-locked workpiece, in particular to a compression bolt.

1, the conventional expansion screw 1 includes a screw 11, a nut 12 screwed on the screw 11, and a compression sleeve 13 sleeved on the screw 11. The compression sleeve 13 includes a housing 131 defining a through hole 133 and an expansion portion 132 integrally and radially expanded from one end of the housing 131. The screw 11 includes a rod body 111 that can penetrate through the through hole 133, a thread 112 screwed on the rod body 111, and a pusher connected to the rod body 111 and abutting against the expansion portion 132.到部113。 Arrived at 113.

When using the expansion screw 1, you must first drill a pre-drilled hole (not shown in the figure) on the wall, and then extend the expansion screw 1 into the pre-drilled hole in the tightening direction shown by the arrow in the figure Inside. When the nut 12 is locked in the tightening direction, the nut 12 pushes against the top edge of the tightening sleeve 13 and pushes the pushing portion 113 into the expansion portion 132. At this time, the pushing portion 113 will gradually expand the expansion portion 132 radially until it is pressed against the inner wall surface of the pre-drilled hole from the inside to the outside, and then it can be reliably fixed to the wall so that the screw 11 can be For fixing other items.

However, after the conventional expansion screw 1 is fixed on the wall, it is hardly removed because it is supported in the pre-drilled hole by the expansion of the expansion portion 132. Moreover, the structural design of the existing expansion screw 1 is relatively complicated, and the screw 11, the nut 12, and the compression sleeve 13 must also be manufactured separately and then assembled, so it is difficult to reduce the manufacturing cost.

Referring to FIG. 2, it is a compression bolt 2, which includes a screw head 21, a rod body 22 extending from the screw head 21, and a thread 23 surrounding and formed on the rod body 22. The thread 23 has a first thread portion 231 adjacent to the thread 21 and a second thread portion 232 continuously connected to the first thread portion 231 and formed with a plurality of serration portions 233.

When using the tightening bolt 2, a pre-drilled hole is also drilled in the wall first, and then the tightening bolt 2 is screwed in, and the sawtooth portion 233 is used for sawing and engraving on the inner wall of the pre-drilled hole. If there are many notches, the notches and the second thread portion 232 can be used to form a mutual engagement, so that the tightening bolt 2 can be stably installed on the wall. Different from the expansion screw 1 shown in Fig. 1, when the tightening bolt 2 needs to be disassembled, the tightening bolt 2 only needs to be screwed out of the pre-drilled hole in the opposite direction to achieve the purpose of disassembly.

However, although the compression bolt 2 has the advantage of being detachable and reusable, in order to hang objects of a certain weight, or other higher-strength support requirements, it is bound to require durability, single-body strength, and even combined stability. Sex is indeed considered. Therefore, how to further optimize all aspects of the tightening bolt 2 has become an important subject actively studied by those in the related technical field.

Therefore, the purpose of the present invention is to provide a compression bolt with high coupling stability.

Therefore, the compression bolt of the present invention includes a screw head, a screw thread integrally connected to the screw head and extending along an axis, and a thread extending continuously on the screw thread.

The screw includes a threadless section adjacent to the screw head and a threaded section connected to the threadless section. The diameter of the threaded section along the axis perpendicular to the axis is 12.10-12.40 mm.

The thread is continuously helically extended on the threaded section of the screw, and the diameter and width perpendicular to the axis is 15.45-15.75 mm, and the pitch along the axis is 10.00-10.40 mm.

The effect of the new model is that by optimizing the screw setting section of the screw and the parameters of the screw, the parameters of the bottom diameter, outer diameter, and pitch of the screw can be matched with the screw to cut the inner wall surface of the pre-drilled hole To achieve the effect of saving labor, and to cooperate with the toothless segment to support the inner wall of the pre-drilled hole, the stability of the combination fixed to the pre-drilled hole is optimized, and the basic performance is indeed improved.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

Referring to Figure 3, a first embodiment of the new type of compression bolt includes a screw head 3, a screw 4 integrally connected to the screw head 3 and extending along an axis L, and a continuous spiral extending on the screw 4 Thread 5. Among them, the first embodiment is made of carbon steel to provide high strength required for drilling and tapping.

3 and 4, the screw head 3 includes a top surface 31 away from the screw 4, a surrounding surface 32 extending radially inward from the top surface 31 to the screw 4, and a surface 32 away from the screw 4 One end is recessed inward, and is suitable for an auxiliary groove 33 for positioning a rotating tool. In other words, the screw head 3 is actually a cone shape that tapers from the top. Wherein, the auxiliary groove 33 has a star shape, which is suitable for the time when the rotating tool used is a star wrench.

Referring to Figure 5 and in conjunction with Figure 3, the screw 4 includes a threadless section 41 adjacent to the screw head 3, and a threaded section 42 connected to the threadless section 41. The threaded section 42 is perpendicular to the axis L The diameter is 12.10~12.40 mm. Wherein, the diameter width of the threaded section 42 is the bottom diameter d of the thread 5.

The thread 5 is continuously spirally extended on the threaded section 42 of the screw 4, and the diameter width of the thread 5 perpendicular to the axis L, that is, the outer diameter D of the thread 5, is 15.45-15.75 mm. In addition, the pitch P of the thread 5 along the axis L direction is 10.00-10.40 mm. By setting the parameters of the bottom diameter d and the outer diameter D of the thread 5, with the appropriate pitch P, the stability of the locking can be optimized according to the locking target, and the effect of labor saving can be achieved at the same time.

Referring to Figure 6 and in conjunction with Figures 3 and 5, when the first embodiment is locked into a wall 9 with a pre-drilled hole 90, the thread 5 has an appropriate base diameter d, outer diameter D, and pitch P, the wall surface surrounding the pre-drilled hole 90 can be cut relatively labor-saving. Then, since the diameter of the toothless section 41 along the vertical axis L is between the threaded section 42 and the thread 5, after the toothless section 41 enters the pre-drilled hole 90, it will abut On the wall surface of the pre-drilled hole 90, the pressing force from the inside to the outside is further used to optimize the fixing effect. In addition, since the screw head 3 is tapered with a wider top, as long as a suitable rotating tool is used to connect the auxiliary groove 33, the rotation force is continuously applied to make the first embodiment screw into the pre-drilled hole 90. The screw head 3 can expand the pre-drilled hole 90 until the top surface 31 of the screw head 3 is flush with the wall surface, that is, the entire screw head 3 is buried in the pre-drilled hole 90, thereby Achieve a more beautiful effect.

Refer to FIG. 7, which is a second embodiment of a new type of compression bolt. The difference between this second embodiment and the first embodiment is that the screw 4 and the thread 5 extend from an end far away from the screw head 3. The set distance is made of reinforced material "carbon steel". Wherein, the set distance X is 33 mm. When the screw 4 and the part of the thread 5 near the end are made of carbon steel, the other parts that do not need to directly touch the screw lock and drill the target can be made of commonly used stainless steel, so that it can be manufactured in large quantities. At the same time of orientation, the purpose of making the second embodiment applicable to the goal of higher hardness is still achieved.

Refer to Figures 8 and 9, which are a third embodiment of a new type of compression bolt. The difference between this third embodiment and the first embodiment is that the screw head 3 includes a bottom surface 39 connected to the screw 4, The bottom surface 39 has a plurality of serrations 391 that surround the screw 4 and protrude in a serrated shape. Wherein, the cross section of the screw head 3 along the axis L is circular. When the third embodiment is screwed into the target until the screw head 3 abuts against the target, the concave-convex structure surface formed by the serrated parts 391 can generate a relatively large friction force to optimize the strength of the locking, and effectively prevent The third embodiment loosened after screwing.

10 and 11 are a fourth embodiment of the new type of compression bolt. The difference between this fourth embodiment and the third embodiment is that the cross section of the screw head 3 along the axis L is hexagonal. Refer to FIG. 12, which is a fifth embodiment of the new type of tightening bolt. The difference between this fifth embodiment and the fourth embodiment is that the auxiliary groove 33 is annular. The screw head 3 with a hexagonal cross-section of the fourth embodiment can be applied with a hexagonal wrench or a rotating tool of a corresponding shape, while the fifth embodiment can cooperate with a ring-shaped rotating tool to individually In response to different usage needs.

In addition to the above-mentioned embodiments, the shape of the screw head 3, whether the serrations 391 are manufactured, and the type of the auxiliary groove 33, and even the choice of all-carbon steel material or part of the carbon steel form, can be free according to requirements. Different embodiments can be combined. For example, the cross-section of the screw head 3 can be hexagonal, the bottom surface 39 has the serrated parts 391, the auxiliary groove 33 is star-shaped, and a part of carbon steel design is adopted to form the same structure as the aforementioned Different embodiments are illustrated, and are not limited to the above-exemplified embodiments.

In summary, the new type of compression bolt can be adjusted by the parameters of the bottom diameter d, outer diameter D, and pitch P of the thread 5 to achieve the needs of optimized locking strength and labor saving, and can pass through the thread 3 and the shape of the auxiliary groove 33, with various force and rotation tools, effectively improve the versatility, so it can indeed achieve the purpose of new cost.

However, the above are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

3: screw head 31: Top plane 32: Surrounding surface 33: auxiliary slot 39: Bottom 391: Sawtooth 4: screw 41: toothless segment 42: Screw set section 5: Thread 9: Wall 90: Pre-drilled D: Outer diameter d: bottom diameter L: axis P: tooth pitch X: set distance

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a cross-sectional view illustrating a conventional expansion screw; Figure 2 is a perspective view illustrating an existing tightening bolt; Figure 3 is a side view illustrating a first embodiment of the tightening bolt of the present invention; Figure 4 is a top view illustrating a screw head of the first embodiment; Figure 5 is a partial cross-sectional view illustrating the specification of a thread of the first embodiment; Fig. 6 is a schematic diagram illustrating the fixing of the first embodiment to a pre-drilled hole; Figure 7 is a side view illustrating a second embodiment of the tightening bolt of the present invention; Figure 8 is a side view illustrating a third embodiment of the tightening bolt of the present invention; Figure 9 is a cross-sectional view illustrating a plurality of serrations of the screw head of the third embodiment; Figure 10 is a side view illustrating a fourth embodiment of the tightening bolt of the present invention; Figure 11 is a plan view illustrating an auxiliary groove of the screw head of the fourth embodiment; and Fig. 12 is a top view illustrating a fifth embodiment of the tightening bolt of the present invention.

3: screw head

31: Top plane

32: Surrounding surface

4: screw

41: toothless segment

42: Screw set section

5: Thread

L: axis

Claims (10)

A compression bolt, including: A screw head A screw is integrally connected to the screw head and extends along an axis, and includes a threadless section adjacent to the threaded head, and a threaded section connected to the threadless section, the threaded section being along a diameter perpendicular to the axis The width is 12.10~12.40 mm; and A thread continuously spirally extends on the threaded section of the screw, the diameter of the thread perpendicular to the axis is 15.45-15.75 mm, and the pitch along the axis is 10.00-10.40 mm. The compression bolt according to claim 1, wherein the screw and the thread extend a set distance from an end away from the screw head, and are made of carbon steel reinforced material. The tightening bolt according to claim 2, wherein the set distance is 33 mm. The tightening bolts described in claim 1 are made of carbon steel. The compression bolt according to claim 1, wherein the diameter width of the toothless section along the axis perpendicular to the axis is between the threaded section and the thread. The compression bolt according to claim 1, wherein the screw head includes a top plane away from the screw, and a surrounding surface extending radially inward from the periphery of the top plane to the screw. The compression bolt according to claim 1, wherein the screw head includes a bottom surface connected to the screw, and the bottom surface has a plurality of serrations protruding in a zigzag shape surrounding the screw. The compression bolt according to claim 7, wherein the cross section of the screw head along the axis is one of a hexagonal shape and a circular shape. The compression bolt according to any one of claims 6 to 8, wherein the screw head further includes an auxiliary groove recessed inward from an end away from the screw rod and suitable for positioning a rotating tool. The tightening bolt according to claim 9, wherein the auxiliary groove is one of a star shape and a ring shape.

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