Threaded fastener

Abstract

The utility model relates to a threaded fastener, which is characterized by comprising a body, a threaded sleeve, a threaded sleeve and a threaded sleeve, and is characterized in that the body is provided with a head end and a guide end; the thread is arranged around the body in a spiral rising mode and rises on the body from the guiding end to the head end, the thread is provided with a driving side face facing the guiding end, a pressure side face facing the head end and a thread peak part, and the driving side face faces the pressure side face. The driving side surface and the pressure side surface extend from the body and converge at the thread peak part; wherein the thread is provided with a series of gaps which are distributed at intervals, and the gaps are retracted in the direction from the peak part of the thread to the body. The notch is formed in the thread, so that after the adjusting nut is tapped into a plastic opponent piece, the plastic opponent piece deforms, the part filling the notch is sunken, the torque of screwing out the adjusting nut from the plastic opponent piece is increased, and therefore the situation that connection between the adjusting nut and the plastic opponent piece is loosened after the adjusting nut is vibrated or fatigued is avoided.

Description

Technical Field

[0001] The present application relates to a threaded fastener in the technical field of vehicle parts, and more particularly to a threaded fastener for adjusting the spacing between vehicle panels. Background Art

[0002] There are many panel accessories inside the vehicle, and when installing these panel accessories, it is necessary to accurately position the panel accessories, such as determining and adjusting the height difference between two panels. Threaded fasteners are usually used, such as adjusting nuts that are driven into one of the panels, and the height difference between the two panels is adjusted by adjusting the depth of the nut. Utility Model Content

[0003] In the prior art, in order to reduce costs and weight, self-tapping nuts made of plastic are often used to tap into the plastic panel to be adjusted in height. However, many plastic products have a characteristic called "plastic creep", which makes it very difficult to fix the material permanently. The so-called "plastic creep" refers to the dimensional changes that occur inside the plastic material over time. "Plastic creep" often accelerates with increasing temperature, resulting in the joint formed by the threaded fasteners fixed in the plastic panel becoming loose over time. When the plastic panel is subjected to vibration, the threaded fasteners that play a fixing role will also encounter some difficulties: the vibration will cause the material inside the plastic panel to naturally move in the direction of loosening on the inclined surface of the screw thread. It can be seen that it is relatively difficult to maintain a continuous tightening torque for the threaded fasteners.

[0004] Therefore, the present application provides a threaded fastener which, after penetrating into a plastic product, can resist the loosening of the threaded connection caused by "plastic creep" or "cold deformation", and can also maintain the required tightening torque of the threaded fastener in the plastic panel when the plastic panel is subjected to vibration.

[0005] Therefore, according to the first aspect of the present application, a threaded fastener is provided, characterized in that it includes: a body, the body having a head end and a guide end; a thread, the thread is arranged around the body in a spiral ascending manner and rises from the guide end to the head end on the body, wherein the thread has a driving side facing the guide end, a pressure side facing the head end and a thread peak, the driving side and the pressure side extend from the body and converge at the thread peak; wherein a series of spaced notches are provided on the thread, and the notches are indented in a direction from the thread peak toward the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram showing the use of an adjusting nut to adjust the height of an opponent member relative to the vehicle sheet metal.

[0007] Figure 2A for Figure 1 A perspective view of the adjusting nut is shown.

[0008] Figure 2B This is a stereoscopic image from another perspective of the adjusting nut.

[0009] Figure 2C for Figure 2A An enlarged view of point A of the adjusting nut is shown.

[0010] Figure 2D for Figure 2B An enlarged view of point B of the adjusting nut is shown.

[0011] Figure 2E for Figure 2A-2B Schematic top view of the notch shown.

[0012] Figure 2F for Figure 2A Front view of the adjusting nut shown.

[0013] Figure 2G for Figure 2F CC section view of the adjusting nut shown.

[0014] Figure 2H for Figure 2A A top view of the adjusting nut is shown.

[0015] Figure 3 for Figure 1 A perspective view of another embodiment of the adjusting nut is shown. DETAILED DESCRIPTION

[0016] Figure 1 A schematic diagram of using an adjusting nut 102 to adjust the height of an opponent part 104 (eg, a panel attachment inside a vehicle) relative to a vehicle sheet metal 108 is shown.

[0017] like Figure 1 As shown, during the installation of the vehicle accessory, the distance between the panel accessory 104 and the vehicle sheet metal 108 is generally controlled by adjusting the depth of the adjusting nut 102 screwed into the panel accessory 104. Figure 2A-2B), the panel attachment 104 is generally provided with a reserved hole 105 that matches the outer diameter of the adjusting nut 102. When tapping the adjusting nut 102, align the lower end of the adjusting nut 102 with the reserved hole 105 of the panel attachment 104, and use a tool to twist the adjusting nut 102 and apply downward pressure to the adjusting nut 102, so that the inner thread that matches the tapping thread 212 of the adjusting nut 102 can be tapped into the inner wall of the reserved hole 105 of the panel attachment 104, thereby fixing the panel attachment 104 and sleeved on a specific position on the adjusting nut 102. The inner side of the adjusting nut 102 has a through hole 272 that penetrates the adjusting nut 102 in the axial direction (see for details). Figure 2G-2H ), so that the fastening bolt 110 can pass through the through hole 272 and the hole 114 on the sheet metal 108, and the adjusting nut 102 and the sheet metal 108 are fixed together by the nut 112. During the fixing process, a gasket 106 is usually placed between the fastening bolt 110 and the adjusting nut 102 to meet the requirements of different sizes of the through hole 272 of the adjusting nut 102. By adjusting the depth of the adjusting nut 102 entering the panel attachment 104, the distance between the panel attachment 104 and the vehicle sheet metal 108 can be adjusted.

[0018] Figures 2A-2H Shown from various perspectives Figure 1 The specific structure of the adjusting nut 102 is shown.

[0019] Figure 2A-2B The three-dimensional view of the adjustment nut 102 is shown from the top view and the bottom view respectively. Figure 2A-2B As shown, the adjusting nut 102 of the present application is made by plastic injection molding, and has a cylindrical body 202, with the two ends of the body 202 being a head end 204 and a guide end 206 respectively. The guide end 206 has a guide portion 242 at its end, and the outer diameter of the guide portion 242 gradually decreases in the direction from the head end 204 to the guide end 206, so that the guide portion 242 is roughly truncated cone-shaped, which is used to assist the adjusting nut 102 to penetrate the opponent part 104. The outer periphery of the body 202 has a thread 212, and the thread 212 surrounds the body 202 in a spiral manner, and spirally rises from the guide end 206 of the body 202 to the head end 204. The thread 212 has a driving side 224 facing the guide end 206, a pressure side 222 facing the head end 204, and a thread peak 226. The driving side 224 and the pressure side 222 extend from the body 202 of the adjusting nut 102 and converge at the thread peak 226. From Figure 2F-2G It can be seen that the cross-section of the thread 212 is roughly trapezoidal, and the width of the thread peak 226 is narrower than the span of the driving side 224 and the pressure side 222 on the body 202. The narrow thread peak 226 helps the adjustment nut 102 to penetrate the opponent part 104.

[0020] Continue as Figure 2A-2B As shown, the adjusting nut 102 has four discharge grooves 252 evenly distributed in the circumferential direction of the outer periphery of the body 202. The discharge grooves 252 are recessed radially inward from the outer side of the body 202 and extend from the head end 204 of the body 202 to the guide end 206, thereby dividing the thread 212 spirally ascending around the body 202 into several parts. A cutting edge 254 extending in the axial direction of the body 202 is formed at the dividing part of the thread 212, which is used for material cutting when the adjusting nut 102 is tapped. At the guide portion 242 of the main body 202, the depth of the discharge groove 252 radially inwardly recessed is deeper than the depth of the portion outside the guide portion 242 radially inwardly recessed. At the same time, the width of the discharge groove 252 at the guide portion 242 is wider than the width of the portion outside the guide portion 242, which is beneficial for discharging a large amount of waste chips generated by the adjusting nut 102 in the initial stage of striking the striking piece 104 from the area where the adjusting nut 102 contacts the striking piece 104.

[0021] For ordinary technicians in this field, the number of discharge grooves 252 can also be set to two or three or more, as long as they can be evenly and symmetrically distributed around the circumference of the adjusting nut 102 and will not cause adverse forces when the adjusting nut 102 enters the striking piece 104.

[0022] Continue as Figure 2A-2B As shown, a series of notches 214 are spaced apart on each spiral ascending circumference of the thread 212, and the notches 214 are indented from the thread peak 226 toward the body 202. After the adjusting nut 102 strikes the plastic counterpart 104, the plastic counterpart 104 will deform at the stressed portion (the portion in contact with the thread 212), and the deformed material can fill the concave area 232 (such as Figure 2C As shown), the torque for screwing out the adjusting nut 102 from the plastic counterpart 104 is increased, thereby preventing the adjusting nut 102 from loosening due to vibration and fatigue after being screwed into the counterpart 104. In an embodiment of the present application, one to two notches 214 are distributed on each row of threads between the two discharge grooves 252, and on the threads with two notches, the spacing between the notches 214 is approximately 1.6 mm. As long as the size of the manufacturing mold allows, the more notches there are, the more conducive it is to increasing the torque for screwing out the adjusting nut 102. For those of ordinary skill in the art, the number of notches 214 can also be flexibly set, for example, more than two notches can be distributed on each row of threads, or notches can be set on the threads in the upper row, but not on the threads in the lower row.

[0023] Figure 2C-2D They are Figure 2A-2B A and B of the middle adjusting nut 102 are enlarged, wherein Figure 2C The perspective of observing the notch 214 from the direction of the pressure side 222 is as follows: Figure 2D This is a viewing angle when observing the notch 214 from the direction of the driving side 224 .

[0024] like Figure 2C As shown, the pressure side surface 222 has a recessed area 232 near the notch 214, which is recessed from the pressure side surface 222 toward the guide end 206. At the same time, as described above, the thread peak 226 is recessed toward the body 202 to form a thread peak recessed area 231. Therefore, the notch 214 of the thread 212 can be regarded as being formed by the pressure side surface 222 and the thread peak 226 being recessed downward or inward. Figure 2D As shown, since the driving side surface 224 itself is not recessed in any direction, the driving side surface 224 has a substantially flat surface, which extends from the body 202 to the thread peak 226 or the thread peak recessed area 231 of the thread 212. Since the surface of the driving side surface 224 is substantially flat, during the process of the adjusting nut 102 entering the counterpart 104, the adjusting nut 102 will not be subjected to excessive additional resistance caused by material deformation of the counterpart 104.

[0025] Figure 2E for Figure 2A-2B The schematic top view of the notch 214 is shown to illustrate the size of the notch 214 in the present application. Figure 2E As shown, in one embodiment of the present application, the opening angle of the notch 214 is approximately 48°, and there is a notch chamfered edge 215 at the outer edge of the notch 214, and the opening angle of the notch chamfered edge 215 is approximately 120°. The depth of the notch 214 is approximately 0.5 mm, and the bottom 217 of the notch is approximately 0.3 mm wide. The above dimensions are set to meet the needs of mold manufacturing and can fully increase the torque when the adjusting nut 102 is screwed out. For ordinary technicians in this field, the notch 214 can also be of other shapes or have other sizes, as long as the torque for screwing the adjusting nut 102 out of the plastic hand piece 104 can be appropriately increased.

[0026] Figure 2F for Figure 2A The front view of the adjusting nut 102 is shown, Figure 2G for Figure 2F The CC cross-sectional view of the adjusting nut 102 is shown, and Figure 2H for Figure 2A The top view of the adjusting nut 102 is shown to illustrate the specific structure of the internal tooling portion 262 and the through hole 272 of the adjusting nut 102 .

[0027] like Figure 2F-2HAs shown, the adjusting nut 102 further includes a tooling portion 262, which is formed by being recessed downward from the central portion of the upper surface 205 of the head end 204 of the body 202, and is used to cooperate with an external tool (not shown in the figure), so that the external tool can screw the adjusting nut 102. In the embodiment of the present application, the shape of the tooling portion 262 recessed downward is an internal hexagon, so that it can be used in conjunction with an external hexagonal bolt wrench, and the depth of the tooling portion 262 recessed downward does not run through the entire axial length of the adjusting nut 102. There is an abutment surface 264 at the deepest part of the recess of the tooling portion 262, which allows the end of the external tool to abut against the abutment surface 264, thereby ensuring the stability of the external tool during operation.

[0028] Continue as Figure 2F-2H Combined with Figure 2A-2B As shown, the adjusting nut 102 is also provided with a through hole 272, which has a common central axis 201 with the body 202, that is, the through hole 272 is coaxially arranged with the body 202. The through hole 272 is arranged to penetrate the body 202 in the axial direction. Figure 2G-2H It can be seen that the through hole 272 continues downward from the abutment surface 264 of the tooling portion 262 (toward the guide end 206 of the body 202) through the body 202, thereby communicating with the tooling portion 262 for accommodating and installing Figure 1 The fastening bolt 110 shown in FIG.

[0029] Figure 3 for Figure 1 A perspective view of another embodiment of the adjusting nut is shown.

[0030] like Figure 3 As shown, the adjustment nut 302 shown is Figure 2A The difference between the illustrated adjusting nut 102 is only the different shape of the head end 304 to accommodate different installation requirements of the adjusting nut. For those skilled in the art, the head end of the adjusting nut can be designed to be not only Figure 2A The cylindrical and Figure 3 The outer hexagonal shape shown can also be designed into other shapes such as a square or a pentagon, as long as it can meet the needs of different installation scenarios.

[0031] The threaded fastener or adjusting nut of the present application has the following advantages over the prior art: by setting a notch on the external thread of the adjusting nut, after the adjusting nut strikes the plastic counterpart, the plastic counterpart is deformed and the portion filling the notch is recessed, resulting in an increase in the torque for unscrewing the adjusting nut from the plastic counterpart, thereby preventing the connection between the adjusting nut and the plastic counterpart from loosening due to vibration or fatigue.

[0032] The examples of embodiments of the present application set forth above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present application.

Claims

1. A threaded fastener (102), characterized in that include: A body (202) having a head end (204) and a leading end (206); a thread (212), the thread (212) being arranged around the body (202) in a spiral ascending manner and ascending from the guide end (206) to the head end (204) on the body (202), wherein the thread (212) has a driving side surface (224) facing the guide end (206), a pressure side surface (222) facing the head end (204), and a thread crest (226), the driving side surface (224) and the pressure side surface (222) extending from the body (202) and converging at the thread crest (226); The thread (212) is provided with a series of notches (214) distributed at intervals, the notches (214) are indented in the direction from the thread peak (226) toward the body (202), and the pressure side surface (222) has a recessed area (232) at the notch (214) that is recessed from the pressure side surface (222) toward the guide end (206).

2. The threaded fastener according to claim 1, characterized in that: The drive side (224) has a flat surface extending from the body (202) to the thread peaks (226) of the threads (212).

3. The threaded fastener according to claim 1, wherein: The guide end (206) has a guide portion (242), the outer diameter of which gradually decreases in a direction from the head end (204) to the guide end (206), for assisting the threaded fastener (102) in being screwed into the counterpart (104).

4. The threaded fastener according to claim 3, characterized in that Also includes: At least two discharge grooves (252) are uniformly distributed on the periphery of the body (202) in the circumferential direction of the body (202), and the at least two discharge grooves (252) are radially recessed inward from the outer side of the body (202) and extend from the head end (204) of the body (202) to the guide end (206), thereby isolating the thread (212) spirally arranged around the body (202), thereby forming a blade (254) along the axial direction of the body (202) at the interruption of the interrupted thread (212).

5. The threaded fastener according to claim 4, characterized in that: The depth of the at least two discharge grooves (252) recessed radially inward at the guide portion (242) is deeper than the depth of the portion of the body (202) recessed radially inward outside the guide portion (242).

6. The threaded fastener according to claim 4, wherein: The width of the at least two discharge grooves (252) at the guide portion (242) is wider than the width of the portion of the body (202) outside the guide portion (242).

7. The threaded fastener according to claim 1, characterized in that Also includes: A tooling portion (262) is recessed downward from an upper surface (205) of the head end (204) of the body (202) to a certain depth, and is used to cooperate with an external tool to screw the threaded fastener (102).

8. The threaded fastener according to claim 1, characterized in that Also includes: A through hole (272), wherein the through hole (272) penetrates the body (202) along the axial direction of the body (202), and the through hole (272) is coaxially arranged with the body (202).

9. The threaded fastener according to claim 7, characterized in that Also includes: A through hole (272) passes through the body (202) from the recessed lower surface (264) of the tooling portion (262) toward the guide end (206) of the body (202), and the through hole (272) is coaxially arranged with the body (202).

10. The threaded fastener according to claim 1, wherein: The threaded fastener (102) is made of plastic material.

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